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audit: add AUDIT_COVERAGE.md + ASCII cleanup + CT fixes

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- Add comprehensive AUDIT_COVERAGE.md documenting all 46 audit modules
  across 8 sections with ~1M+ total assertions
- Pure ASCII cleanup: remove all Unicode from source/cmake/script files
  (box-drawing, arrows, Greek, emoji, BOM, Georgian in comments)
- CT fix: RISC-V is_zero_mask (seqz+neg inline asm)
- CT fix: ct_compare general path (snez)
- All 188 files updated for ASCII-only compliance (Section 17 rule)
- Verified: 46/46 audit PASS on X64, ARM64, RISC-V (QEMU + Mars HW)
- Verified: 24/24 CTest PASS on X64
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ANNOUNCEMENT_DRAFT.md
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# Announcement Draft — Verification Transparency Snapshot v3.14
# Announcement Draft -- Verification Transparency Snapshot v3.14
> Target: DelvingBitcoin / Stacker News
> Tone: Technical, measured, no hype
@ -7,7 +7,7 @@
## Post Title
**UltrafastSecp256k1 v3.14 — Verification Transparency Snapshot**
**UltrafastSecp256k1 v3.14 -- Verification Transparency Snapshot**
## Post Body
@ -20,28 +20,28 @@ This is not an audit announcement. This is a verification data drop.
### What was verified
- **641,194 deterministic internal checks** (field, scalar, point, CT, security, integration) — 0 failures
- **641,194 deterministic internal checks** (field, scalar, point, CT, security, integration) -- 0 failures
- **Differential tested** against bitcoin-core/libsecp256k1 v0.6.0: 7,860 cross-library checks, 0 mismatches. Nightly run: ~1.3M checks.
- **Standard vectors**: BIP-340 (15/15), RFC 6979 (6/6), BIP-32 TV1–TV5 (90/90)
- **Sanitizers**: ASan, UBSan, TSan, Valgrind — 0 findings
- **Constant-time**: dudect Welch t-test on `ct::scalar_mul`, `ct::ecdsa_sign`, `ct::schnorr_sign`, `ct::field_inv` — all pass (t < 4.5)
- **Fuzzing**: ~580K+ structured fuzz iterations (DER, Schnorr, pubkey, address, BIP-32, FFI) — 0 crashes
- **Standard vectors**: BIP-340 (15/15), RFC 6979 (6/6), BIP-32 TV1-TV5 (90/90)
- **Sanitizers**: ASan, UBSan, TSan, Valgrind -- 0 findings
- **Constant-time**: dudect Welch t-test on `ct::scalar_mul`, `ct::ecdsa_sign`, `ct::schnorr_sign`, `ct::field_inv` -- all pass (t < 4.5)
- **Fuzzing**: ~580K+ structured fuzz iterations (DER, Schnorr, pubkey, address, BIP-32, FFI) -- 0 crashes
- **14 CI workflows** enforcing the above on every commit
### Machine-verifiable artifacts in every release
- `SHA256SUMS.txt` — binary checksums
- Cosign signatures (Sigstore keyless) — `.sig` + `.pem`
- `SHA256SUMS.txt` -- binary checksums
- Cosign signatures (Sigstore keyless) -- `.sig` + `.pem`
- SLSA provenance attestation
- `sbom.cdx.json` — CycloneDX 1.6 SBOM
- `selftest_report.json` — structured selftest output (JSON, parseable)
- `verification_report.md` — full transparency report
- `sbom.cdx.json` -- CycloneDX 1.6 SBOM
- `selftest_report.json` -- structured selftest output (JSON, parseable)
- `verification_report.md` -- full transparency report
### What we do NOT claim
- Not externally audited
- Not formally verified (no ct-verif, no Vale)
- CT tested on x86-64 only; other µarch may differ
- CT tested on x86-64 only; other uarch may differ
- MuSig2 and FROST are experimental (API may change)
- GPU backends are variable-time by design

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# UltrafastSecp256k1 -- Full Audit Coverage
**Version**: v3.14.0
**Audit Runner**: `unified_audit_runner`
**Verdict**: **AUDIT-READY** -- 46/46 modules passed
**Total Checks**: ~1,000,000+
**Runtime**: ~35.6 seconds (X64, Clang 21.1.0, Release)
---
## Summary
| Metric | Value |
|----------------------|---------------------------------------------|
| Sections | 8 |
| Modules | 46 (45 + Phase 1 selftest) |
| Total assertions | ~1,000,000+ (parser fuzz 530K, CT deep 120K, field Fp 264K, ...) |
| Real failures | 0 |
| Platforms tested | X64 (Clang 21), ARM64 (QEMU), RISC-V (QEMU + Mars HW) |
---
## Section 1/8: Mathematical Invariants (Fp, Zn, Group Laws) -- 13/13 PASS
### [1/45] Field Fp Deep Audit -- 264,622 checks
11 sub-tests covering the full finite field GF(p) where p = 2^256 - 2^32 - 977:
- **Addition**: a + b mod p, commutativity, associativity, identity (0), inverse
- **Subtraction**: a - b mod p, consistency with addition
- **Multiplication**: a * b mod p, commutativity, associativity, distributivity
- **Squaring**: a^2 == a * a, consistency
- **Reduction**: values >= p are reduced correctly, canonical form
- **Canonical check**: normalized representation verification
- **Limb boundary**: cross-limb carry propagation correctness
- **Inversion**: a * a^{-1} == 1 mod p (Fermat's little theorem)
- **Square root**: sqrt(a^2) == +-a, Euler criterion
- **Batch inverse**: Montgomery's trick batch inversion
- **Random stress**: randomized field operations
### [2/45] Scalar Zn Deep Audit -- 93,215 checks
8 sub-tests covering the scalar field Z_n where n is the secp256k1 group order:
- **Mod n**: reduction modulo group order
- **Overflow detection**: values >= n handled correctly
- **Edge cases**: 0, 1, n-1, n, n+1
- **Arithmetic**: add, sub, mul, negate mod n
- **Inversion**: a * a^{-1} == 1 mod n
- **GLV decomposition**: k = k1 + k2 * lambda mod n (endomorphism split)
- **High-bit patterns**: scalars with MSB set
- **Negation**: a + (-a) == 0 mod n
### [3/45] Point Operations Deep Audit -- 116,124 checks
11 sub-tests covering elliptic curve group operations:
- **Infinity**: O + P == P, P + O == P, O + O == O
- **Jacobian addition**: P + Q in Jacobian coordinates
- **Doubling**: 2P == P + P
- **Self-addition**: P + P via add vs dbl
- **Inverse addition**: P + (-P) == O
- **Affine conversion**: Jacobian -> Affine -> Jacobian roundtrip
- **Scalar multiplication**: k * G for known k values
- **k*G test vectors**: verified against published test vectors
- **ECDSA integration**: sign/verify with computed points
- **Schnorr integration**: BIP-340 sign/verify with computed points
- **100K stress test**: 100,000 random scalar multiplications
### [4/45] Field & Scalar Arithmetic -- 4,237 checks
- Field mul, sqr, add, sub, normalize operations
- Scalar NAF (Non-Adjacent Form) encoding
- Scalar wNAF (windowed NAF) encoding
- Cross-verification between representations
### [5/45] Arithmetic Correctness -- 7 suites, 55 checks
- k*G computed via 3 independent methods (must agree)
- P1 + P2 point addition
- k*Q arbitrary base point
- Random large scalar multiplication
- Distributive law: k*(P+Q) == kP + kQ
### [6/45] Scalar Multiplication -- 319 checks
- Known k*G vectors (published test data)
- `fast::scalar_mul` vs `generic::scalar_mul` equivalence
- Large scalar values (near n)
- Repeated addition: k*G == G + G + ... + G (k times)
- Doubling chain: 2^k * G
- Point addition consistency
- k*Q arbitrary base point
- Random k*Q == (k1*k2)*G
- Distributive law
- Edge cases (k=0, k=1, k=n-1)
### [7/45] Exhaustive Algebraic Verification -- 5,399 checks
14 sub-tests with exhaustive enumeration:
1. **Closure**: k*G on curve for k=1..256
2. **Additive consistency**: k*G + G == (k+1)*G for k=1..256
3. **Homomorphism**: a*G + b*G == (a+b)*G for 1,024 (a,b) pairs
4. **Scalar mul vs iterated add**: scalar_mul(k) == G+G+...+G for k=1..256
5. **Scalar associativity**: k*(l*G) == (k*l)*G
6. **Addition axioms**: associativity, commutativity, identity, inverse
7. **Doubling**: 2*P == P + P
8. **Curve order**: n*G == O, (n-1)*G == -G
9. **Scalar arithmetic exhaustive**: 1,089 pairs for N=128
10. **CT consistency**: ct::scalar_mul vs fast::scalar_mul for k=1..64
11. **Negation properties**
12. **In-place ops**: next/prev/dbl_inplace vs immutable equivalents
13. **Pippenger MSM**: multi-scalar multiplication correctness
14. **Comb generator**: comb_mul(k) vs k*G
### [8/45] Comprehensive 500+ Suite -- 12,023 checks (10 skipped)
29 categories covering the entire API surface:
| Category | What it tests |
|----------|---------------|
| FieldArith | Field add, sub, mul, sqr, neg, half |
| FieldConversions | bytes <-> limbs <-> hex roundtrips |
| FieldEdgeCases | 0, 1, p-1, p, max limb values |
| FieldInverse | Fermat, extended Euclidean, batch |
| FieldBranchless | All field ops produce identical results regardless of input patterns |
| FieldOptimal | Optimal representation dispatch (normalized vs lazy) |
| FieldRepresentations | ASM/platform-specific field ops match generic |
| ScalarArith | 4,225 small-range pairs verified |
| ScalarConversions | bytes <-> limbs <-> hex |
| ScalarEdgeCases | 0, 1, n-1, n, max values |
| ScalarNAF/wNAF | NAF and windowed NAF encoding correctness |
| PointBasic | G, 2G, infinity, on-curve checks |
| PointScalarMul | k*G, k*P for various k |
| PointInplace | In-place add/dbl/negate/next/prev |
| PointPrecomputed | Precomputed table scalar mul |
| PointSerialization | Compressed/uncompressed SEC1 roundtrip |
| PointEdgeCases | Infinity, negation, self-add |
| CTOps | Constant-time primitive operations |
| CTField | CT field add/sub/mul/sqr/inv |
| CTScalar | CT scalar add/sub/neg/cmov |
| CTPoint | CT point add/dbl/scalar_mul |
| GLV | GLV endomorphism decomposition + recombination |
| MSM | Multi-scalar multiplication (Pippenger/Straus) |
| CombGen | Comb-based generator multiplication |
| BatchInverse | Montgomery's trick batch inverse |
| ECDSA | Sign, verify, compact/DER encoding |
| Schnorr | BIP-340 sign, verify, x-only pubkey |
| ECDH | Diffie-Hellman shared secret |
| Recovery | ECDSA public key recovery from signature |
| *Extras* | SHA-256/512, batch affine add, batch verify, homomorphism, precompute |
### [9/45] ECC Property-Based Invariants -- 89 checks
Group law axioms verified with random points:
- **Identity**: P + O == P (5 tests)
- **Inverse**: P + (-P) == O (6 tests)
- **Negate involution**: -(-P) == P (6 tests)
- **Commutativity**: P + Q == Q + P (8 pairs)
- **Associativity**: (P + Q) + R == P + (Q + R) (5 triples)
- **Double consistency**: 2*P == P + P (6 points)
- **Scalar ring**: (a + b)*G == a*G + b*G (8 pairs)
- **Scalar associativity**: (a*b)*G == a*(b*G) (8 pairs)
- **Distributivity**: k*(P + Q) == k*P + k*Q (8 triples)
- **Generator order**: n*G == O, (n-1)*G == -G, 1*G == G, 0*G == O
- **Subtraction**: P - Q == P + (-Q) (5 pairs)
- **Small k*G**: k*G == G+G+...+G for k=1..8
- **In-place ops**: add_inplace, dbl_inplace, negate_inplace, next_inplace, prev_inplace
- **Dual scalar mul**: a*G + b*P (5 tests)
### [10/45] Affine Batch Addition -- 548 checks
- Empty batch handling
- Precompute 64 G-multiples table
- `batch_add_affine_x` correctness (128 additions)
- `batch_add_affine_xy` correctness (64 XY results)
- Bidirectional batch add (32 pairs)
- Y-parity extraction (32 values)
- Arbitrary point multiples table (16 points)
- Negate table (16 points)
- Large batch benchmark: 1,024 points -- 237.5 ns/point, 4.21 Mpoints/s
### [11/45] Carry Chain Stress -- 247 checks
Limb boundary and carry propagation edge cases:
1. All-ones limb pattern (2^256 - 1)
2. Single-limb maximum patterns
3. Cross-limb boundary carry patterns
4. Values near the prime p (reduction boundary)
5. Maximum intermediate values (carry chain stress)
6. Scalar carry propagation near group order n
7. Point arithmetic carry propagation
### [12/45] FieldElement52 (5x52 Lazy-Reduction) -- 267 checks
Cross-verification of the 5x52-bit limb representation against the reference 4x64:
- Conversion roundtrip: 4x64 -> 5x52 -> 4x64
- Zero / One constants
- Addition (100 pairs), lazy addition chains
- Negation
- Multiplication (100 pairs), squaring
- Multiplication chains (repeated squaring)
- Mixed operations (add + mul + square chains)
- Half operation
- Normalization edge cases
- Commutativity and associativity
### [13/45] FieldElement26 (10x26 Lazy-Reduction) -- 269 checks
Same as FieldElement52 tests plus:
- Multiplication after lazy additions (no intermediate normalize)
---
## Section 2/8: Constant-Time & Side-Channel Analysis -- 5/5 PASS
### [14/45] CT Deep Audit -- 120,651 checks
13 sub-tests with massive differential testing:
1. **CT mask generation** -- 12 checks
2. **CT cmov / cswap** -- 30,000 operations (10K iterations)
3. **CT table lookup (256-bit)** -- 30,000 lookups
4. **CT field ops vs fast:: differential** -- 81,000 comparisons (10K iterations)
5. **CT scalar ops vs fast:: differential** -- 111,000 comparisons (10K iterations)
6. **CT scalar cmov/cswap** -- 1K iterations
7. **CT field cmov/cswap/select** -- 1K iterations
8. **CT is_zero / eq comparisons** -- edge case coverage
9. **CT scalar_mul vs fast:: scalar_mul** -- 1K random scalars
10. **CT complete addition vs fast add** -- 1K random point pairs
11. **CT byte-level utilities** -- memcpy_if, memswap_if, memzero
12. **CT generator_mul vs fast** -- 500 random scalars
13. **Timing variance sanity check** -- rudimentary timing ratio (informational only)
### [15/45] Constant-Time Layer Tests -- 60 checks
Focused functional tests for the CT API:
- **Field arithmetic**: add, sub, mul, sqr, neg, inv, normalize
- **Field conditional**: cmov (mask=0/all-ones), cswap, select, cneg, is_zero, eq
- **Scalar arithmetic**: add, sub, neg
- **Scalar conditional**: cmov, bit access, window extraction
- **Complete addition**: G+2G=3G, G+G=2G, G+O=G, O+G=G, O+O=O, G+(-G)=O
- **CT scalar_mul**: 1*G, 2*G, 7*G, 0xDEADBEEF*G, 0*G
- **CT generator_mul**: generator_mul(42) == fast 42*G
- **On-curve check**: G and 12345*G
- **Point equality**: G==G, G!=42*G, O==O, G!=O
- **CT + fast mixing**: fast(100*G) -> ct(7*P) == 700*G
- **CT ECDSA**: sign r/s matches fast, signature verifies, zero key returns zero sig
- **CT Schnorr**: keypair matches fast, sign r/s matches fast, signature verifies, pubkey(1)==G.x
### [16/45] FAST == CT Equivalence -- 320 checks
Systematic equivalence verification between fast:: and ct:: layers:
- Boundary + 64 random `ct::generator_mul` vs fast
- 64 random `ct::scalar_mul(P, k)` vs fast
- Boundary edge scalars (0, 1, n-1)
- 32 random ECDSA signatures: CT == FAST
- 32 random Schnorr signatures: CT == FAST
- Schnorr pubkey CT == FAST (boundary + random)
- CT group law invariants
### [17/45] Side-Channel Dudect Smoke -- 34 checks
Statistical timing analysis using Welch's t-test (|t| < 4.5 threshold):
**[1] CT Primitives:**
| Operation | |t| | Result |
|-----------|-----|--------|
| is_zero_mask | 0.98 | OK |
| bool_to_mask | 0.40 | OK |
| cmov256 | 0.65 | OK |
| cswap256 | 1.00 | OK |
| ct_lookup_256 | 0.99 | OK |
| ct_equal | 0.31 | OK |
**[2] CT Field:**
| Operation | |t| | Result |
|-----------|-----|--------|
| field_add | 4.79 | OK |
| field_mul | 0.18 | OK |
| field_sqr | 0.41 | OK |
| field_inv | 2.01 | OK |
| field_cmov | 0.14 | OK |
| field_is_zero | 3.99 | OK |
**[3] CT Scalar:**
| Operation | |t| | Result |
|-----------|-----|--------|
| scalar_add | 1.12 | OK |
| scalar_sub | 6.39 | OK |
| scalar_cmov | 0.48 | OK |
| scalar_is_zero | 0.82 | OK |
| scalar_bit | 1.40 | OK |
| scalar_window | 1.74 | OK |
**[4] CT Point:**
| Operation | |t| | Result |
|-----------|-----|--------|
| complete_add (P+O vs P+Q) | 0.95 | OK |
| complete_add (P+P vs P+Q) | 1.01 | OK |
| scalar_mul (k=1 vs random) | 0.95 | OK |
| scalar_mul (k=n-1 vs random) | 0.93 | OK |
| generator_mul (low vs high HW) | 0.45 | OK |
| point_tbl_lookup (0 vs 15) | 1.05 | OK |
**[5] CT Byte Utilities:**
| Operation | |t| | Result |
|-----------|-----|--------|
| ct_memcpy_if | 1.00 | OK |
| ct_memswap_if | 1.28 | OK |
| ct_memzero | 0.61 | OK |
| ct_compare | 0.14 | OK |
**[6] Control test**: fast::scalar_mul |t| = 31.22 (NOT CT -- expected, confirms the test detects leaks)
**[7] Valgrind CLASSIFY/DECLASSIFY**: All ct:: operations correctly classified as secret-independent.
**[8] ASM inspection**: Verifies ct:: code uses cmov/cmovne/cmove (branchless) instead of jz/jnz (branches).
### [18/45] CT scalar_mul vs Fast Diagnostic -- PASS
Diagnostic timing comparison between CT and fast scalar multiplication paths.
---
## Section 3/8: Differential & Cross-Library Testing -- 3/3 PASS
### [19/45] Differential Correctness -- 13,007 checks
8 sub-tests with large-scale randomized differential testing:
1. **Public key derivation**: 1,000 random private keys -> pubkey, 5,002 checks
2. **ECDSA sign + verify**: 1,000 rounds internal consistency
3. **Schnorr (BIP-340) sign + verify**: 1,000 rounds internal consistency
4. **Point arithmetic identities**: algebraic law verification
5. **Scalar arithmetic**: mod n correctness
6. **Field arithmetic**: mod p correctness
7. **ECDSA signature serialization roundtrip**: compact <-> DER
8. **BIP-340 known test vectors**: official Bitcoin test vectors
### [20/45] Fiat-Crypto Reference Vectors -- 647 checks
Golden vectors from Fiat-Crypto / Sage computer algebra:
1. Field multiplication golden vectors
2. Field squaring golden vectors
3. Field inversion golden vectors
4. Field add/sub boundary vectors
5. Scalar arithmetic golden vectors (group order n)
6. Point arithmetic golden vectors
7. Algebraic identity verification (100 rounds)
8. Serialization round-trip consistency
### [21/45] Cross-Platform KAT -- 24 checks
Known Answer Tests that must produce identical results on all platforms:
1. Field arithmetic KAT
2. Scalar arithmetic KAT
3. Point operation KAT
4. ECDSA KAT (RFC 6979 deterministic)
5. Schnorr KAT (BIP-340 deterministic)
6. Serialization consistency KAT
---
## Section 4/8: Standard Test Vectors (BIP-340, RFC-6979, BIP-32) -- 4/4 PASS
### [22/45] BIP-340 Official Vectors -- 27 checks
Full coverage of the official Bitcoin BIP-340 Schnorr signature test vectors:
- **V0-V3** (sign + verify): pubkey matches, signature matches, verification passes, our signature verifies (4 vectors x 4 checks = 16)
- **V4** (verify-only): valid signature
- **V5**: public key not on curve -> reject
- **V6**: R has odd Y -> reject
- **V7**: negated message -> reject
- **V8**: negated s -> reject
- **V9**: R at infinity -> reject
- **V10**: R at infinity (x=1) -> reject
- **V11**: R.x not on curve -> reject
- **V12**: R.x == p -> reject
- **V13**: s == n -> reject
- **V14**: pk >= p -> reject
### [23/45] BIP-32 Official Vectors TV1-TV5 -- 90 checks
Complete BIP-32 HD key derivation test vector coverage:
- **TV1**: Master key + 5 derivation levels (m, m/0', m/0'/1, m/0'/1/2', m/0'/1/2'/2, m/0'/1/2'/2/1000000000) -- chain_code, priv_key, pub_key at each level
- **TV2**: Master + 5 levels with hardened indices (2147483647')
- **TV3**: Leading zeros retention
- **TV4**: Leading zeros with hardened children
- **TV5**: Serialization format (78 bytes, version bytes xprv/xpub, depth, parent fingerprint, child number, chain code, key prefix)
- **Public derivation consistency**: Private and public derivation yield same pubkey and chain codes
### [24/45] RFC 6979 Deterministic ECDSA -- 35 checks
- **6 nonce generation vectors**: Various private keys and messages
- **7 ECDSA signature vectors** (r + s): Including d=1, d=n-1, d=69ec, small d, tiny d
- **5 verify roundtrips**: verify(sign(msg, priv), pub) == true
- **5 wrong message rejections**: verify with wrong message == false
- **Determinism**: Same (key, msg) -> identical signature
- **Low-S**: All signatures satisfy BIP-62 low-S requirement
### [25/45] FROST Reference KAT Vectors -- 9 sub-tests
1. Lagrange coefficient mathematical properties
2. FROST DKG determinism with fixed seeds
3. FROST DKG Feldman VSS commitment verification
4. FROST 2-of-3 full signing -> BIP-340 verification
5. FROST 3-of-5 full signing -> BIP-340 verification
6. Lagrange coefficients consistency across 10 subsets
7. Pinned KAT: DKG group key determinism
8. Pinned KAT: Full signing round-trip determinism
9. FROST DKG secret reconstruction via Lagrange interpolation
---
## Section 5/8: Fuzzing & Adversarial Attack Resilience -- 4/4 PASS
### [26/45] Adversarial Fuzz -- 15,461 checks
10 sub-tests targeting malformed/adversarial inputs:
1. **Malformed public key rejection** (3 checks)
2. **Invalid ECDSA signatures** (4 checks)
3. **Invalid Schnorr signatures** (4 checks)
4. **Oversized scalars** (4 checks)
5. **Boundary field elements** (4 checks)
6. **ECDSA recovery edge cases** (1,000 rounds, 4,750 checks)
7. **Random operation sequence** (10,000 random ops, 1,692 checks)
8. **DER encoding round-trip** (1,000 rounds, 3,000 checks)
9. **Schnorr signature byte round-trip** (1,000 rounds, 2,000 checks)
10. **Signature normalization / low-S** (1,000 rounds, 4,000 checks)
### [27/45] Parser Fuzz -- 530,018 checks
High-volume random input fuzzing with crash detection:
1. **DER parsing: random bytes** -- 100,000 random inputs, 0 accepted, 0 crashes
2. **DER parsing: adversarial inputs** -- targeted malformation
3. **DER round-trip** -- 50,000 compact -> DER -> compact roundtrips
4. **Schnorr verify: random inputs** -- 100,000 random inputs, 0 accepted, 0 crashes
5. **Schnorr round-trip** -- 10,000 sign -> verify roundtrips
6. **Random privkey -> pubkey** -- 10,000 random keys
7. **Pubkey round-trip** -- 10,000 create -> parse roundtrips
8. **Pubkey parse: adversarial inputs** -- targeted malformation
9. **ECDSA verify: random garbage** -- 50,000 random inputs, 0 accepted, 0 crashes
### [28/45] Address/BIP32/FFI Boundary Fuzz -- 13 sub-tests
1. P2PKH address fuzz (Base58Check)
2. P2WPKH address fuzz (Bech32)
3. P2TR address fuzz (Bech32m)
4. WIF encode/decode fuzz
5. BIP32 master key from seed fuzz
6. BIP32 path parser fuzz
7. BIP32 derive (single-step) fuzz
8. FFI context lifecycle stress
9. FFI ECDSA sign/verify boundary fuzz
10. FFI Schnorr sign/verify boundary fuzz
11. FFI ECDH + tweaking boundary fuzz
12. FFI Taproot output key boundary fuzz
13. FFI error inspection
### [29/45] Fault Injection Simulation -- 610 checks
Verifying that single-bit faults are always detected:
1. **Scalar fault injection**: bit-flip in k -> wrong k*G (500/500 detected)
2. **Point coordinate fault injection** (500/500)
3. **ECDSA signature fault injection**: r-fault 200/200, msg-fault 200/200, s-fault 200/200
4. **Schnorr signature fault injection** (200/200)
5. **CT operations fault resilience**: 1,000/1,000 single-bit differences detected
6. **Cascading fault simulation**: multi-step scalar_mul (100/100)
7. **Point addition fault injection** (300/300)
8. **GLV decomposition fault resilience** (200/200)
---
## Section 6/8: Protocol Security (ECDSA, Schnorr, MuSig2, FROST) -- 9/9 PASS
### [30/45] ECDSA + Schnorr -- 22 checks
- SHA-256 NIST vectors ("abc", empty string)
- Scalar::inverse correctness (7 * 7^{-1} == 1, random, inverse(0)==0)
- Scalar::negate (a + (-a) == 0, negate(0)==0)
- ECDSA: sign/verify, low-S (BIP-62), wrong message/key rejection, compact encoding, DER encoding
- ECDSA determinism (RFC 6979)
- Tagged hash (BIP-340): determinism, different tags -> different hashes
- Schnorr BIP-340: sign/verify, wrong message rejection, roundtrip
### [31/45] BIP-32 HD Derivation -- 28 checks
- HMAC-SHA512 (RFC 4231 TC2)
- Master key generation (depth=0, chain code, private key match TV1)
- Child derivation (m/0' depth=1, chain code matches)
- Path derivation (m/0'/1, m/0'/1/2', empty path fails, invalid prefix fails)
- Serialization (78 bytes, xprv version, depth, fingerprint)
- Seed validation (< 16 bytes rejected, 16 and 64 accepted)
### [32/45] MuSig2 -- 19 checks
- Key aggregation: valid point, deterministic, differs from individual keys
- Nonce generation: non-zero secrets, valid R1/R2, different extra -> different nonce
- 2-of-2 signing: partial sig 1/2 verify, final MuSig2 sig verifies as standard Schnorr
- 3-of-3 signing: agg key valid, partial sig 0/1/2 verify, MuSig2 sig verifies as Schnorr
- Single-signer edge case: agg key valid, partial verify OK, valid Schnorr sig
### [33/45] ECDH + Recovery + Taproot -- 76 checks
- **ECDH**: Basic key exchange, x-only variant, raw x-coordinate, zero private key edge, infinity public key edge
- **Recovery**: Basic sign + recover, multiple different private keys, compact 65-byte serialization, wrong recovery ID, invalid signature (zero r/s)
- **Taproot**: TapTweak hash, output key derivation, private key tweaking, commitment verification, leaf and branch hashes, Merkle tree construction, Merkle proof verification, full flow (key-path + script-path)
- **CT Utils**: Constant-time equality, zero check, compare, secure memory zeroing, conditional copy and swap
- **Wycheproof**: ECDSA edge cases, Schnorr edge cases, recovery edge cases
### [34/45] v4 Features (Pedersen/FROST/Adaptor/Address/SP) -- 90 checks
- **Pedersen Commitments**: generator H, commit/verify roundtrip, wrong value/blinding fails, homomorphic addition, balance proof, switch commitment, serialization (compressed prefix, 33 bytes), zero-value commitment
- **FROST**: Lagrange coefficients (l1=2, l2=-1, interpolation), key generation (poly degree, share count, 3 participants, group keys match), 2-of-3 signing
- **Schnorr Adaptor**: R_hat valid, pre-signature valid, adapted sig valid Schnorr, extract secret matches
- **ECDSA Adaptor**: R_hat valid, r nonzero, adaptor verify, adapted ECDSA nonzero, extract secret matches
- **Identity adaptor**: edge case
- **Base58Check**: encode, leading ones, decode, size, roundtrip
- **Bech32/Bech32m**: encode, prefix bc1/bc1p, decode, witness version 0/1, program 20/32 bytes
- **HASH160**: deterministic, different inputs
- **P2PKH**: starts with 1, valid length, testnet prefix
- **P2WPKH**: bc1q prefix, testnet tb1q, decode, version 0, 20-byte program
- **P2TR**: bc1p prefix, decode, version 1, 32-byte program
- **WIF**: compressed (K/L prefix), uncompressed (5 prefix), testnet, roundtrip
- **Address consistency**: deterministic, different keys -> different addresses
- **Silent Payments**: scan/spend key valid, address encoded with prefix, output key derivation, tweak nonzero, detection (1 and 3 outputs), derived key matches
### [35/45] Coins Layer -- 32 checks
- **CurveContext**: secp256k1_default(), with_generator(custom), derive_public_key, effective_generator
- **CoinParams**: 27 coins defined, Bitcoin/Ethereum values, find_by_ticker + find_by_coin_type
- **Keccak-256**: empty string, "abc", incremental == one-shot
- **Ethereum**: address format (0x + 40 hex), EIP-55 checksum verify, case sensitivity
- **Coin addresses**: Bitcoin P2PKH(1), P2WPKH(bc1q), Litecoin(ltc1q), Dogecoin(D), Ethereum(EIP-55), Dash(X), Dogecoin P2WPKH(empty -- no SegWit)
- **WIF per-coin**: Bitcoin(K/L), Litecoin(T)
- **BIP-44 HD**: Bitcoin taproot(m/86'/0'/0'/0/0), Ethereum(m/44'/60'/0'/0/0), best_purpose selection, seed -> key, seed -> BTC address, seed -> ETH address
- **Custom generator**: coin_derive with custom G, deterministic derivation
- **Full pipeline**: same key -> different addresses per coin
### [36/45] MuSig2 + FROST Protocol Suite -- 975 checks
15 sub-tests with protocol-level verification:
1. MuSig2 key aggregation determinism (273 checks)
2. MuSig2 key aggregation ordering matters
3. MuSig2 key aggregation duplicate keys
4. MuSig2 full round-trip: 2 signers
5. MuSig2 full round-trip: 3 signers
6. MuSig2 full round-trip: 5 signers
7. MuSig2 wrong partial sig fails verify
8. MuSig2 bit-flip invalidates final signature
9. FROST DKG 2-of-3
10. FROST DKG 3-of-5
11. FROST signing 2-of-3
12. FROST signing 3-of-5
13. FROST different 2-of-3 subsets all valid
14. FROST bit-flip invalidates signature
15. FROST wrong partial sig fails verify
### [37/45] MuSig2 + FROST Adversarial -- 316 checks
9 sub-tests targeting protocol-level attacks:
1. **Rogue-key resistance**: Attacker cannot bias aggregated key
2. **Key coefficient depends on full group**: Changing group changes coefficients
3. **Different messages -> different signatures** (100 rounds)
4. **Nonce binding**: Fresh nonces -> different R values (60 rounds)
5. **Fault injection**: Wrong key in partial sign detected
6. **Malicious participant -- bad DKG share**: Detected and rejected
7. **Malicious participant -- bad partial sig**: Detected and rejected
8. **Message binding**: Different messages -> different signatures (40 rounds)
9. **Signer set binding**: Same key, different subsets -> different results
### [38/45] Integration -- 13,811 checks
10 sub-tests for cross-protocol integration:
1. **ECDH key exchange symmetry** (1,000 rounds, 4,001 checks)
2. **Schnorr batch verification**
3. **ECDSA batch verification**
4. **ECDSA sign -> recover -> verify** (1,000 rounds)
5. **Schnorr individual vs batch** (500 rounds)
6. **Fast vs CT integration cross-check** (500 rounds)
7. **Combined ECDH + ECDSA protocol flow** (100 rounds)
8. **Multi-key consistency** (point addition, 200 rounds)
9. **Schnorr/ECDSA key consistency** (200 rounds)
10. **Stress: mixed protocol ops** (5,000 rounds, 100% success)
---
## Section 7/8: ABI & Memory Safety -- 3/3 PASS
### [39/45] Security Hardening -- 17,309 checks
10 sub-tests covering defensive security:
1. **Zero / identity key handling** (5 checks)
2. **Secret zeroization** (ct_memzero verification)
3. **Bit-flip resilience on signatures** (1,000 rounds)
4. **Message bit-flip detection** (1,000 rounds)
5. **Nonce determinism** (RFC 6979 compliance)
6. **Serialization round-trip integrity**
7. **Compact recovery serialization** (1,000 rounds)
8. **Double operations idempotency**
9. **Cross-algorithm consistency** (ECDSA/Schnorr same key)
10. **High-S detection** (3,000 rounds)
### [40/45] Debug Invariant Assertions -- 372 checks
6 sub-tests verifying internal consistency invariants:
1. Field element normalization invariant
2. Point on-curve invariant
3. Scalar validity invariant
4. Debug assertion macro integration
5. Full computation chain with invariant checks
6. Debug counter accumulation (11 invariant checks tracked)
### [41/45] ABI Version Gate -- 12 checks
Compile-time ABI compatibility verification ensuring header and library versions match.
---
## Section 8/8: Performance Validation & Regression -- 4/4 PASS
### [42/45] Accelerated Hashing -- 877 checks
Hardware-accelerated hash function validation:
- **Feature detection**: SHA-NI, AVX2, AVX-512
- **SHA-256**: NIST known vectors, sha256_33, sha256_32 correctness
- **RIPEMD-160**: Known vectors, ripemd160_32 correctness
- **Hash160**: Pipeline correctness (SHA-256 + RIPEMD-160)
- **Double-SHA256**: Correctness
- **Batch operations**: Batch hash correctness
- **SHA-NI vs scalar cross-check**: Hardware vs software must match
- **Benchmark**: SHA-NI 49.1 ns vs scalar 364.6 ns (7.4x speedup), batch Hash160 1.92 Mkeys/s
### [43/45] SIMD Batch Operations -- 8 checks
- Runtime detection (AVX-512 / AVX2)
- Batch field add, sub, mul, square
- Batch field inverse (Montgomery's trick)
- Single element batch inverse
- Batch inverse with explicit scratch buffer
### [44/45] Multi-Scalar & Batch Verify -- 16 checks
- **Shamir's trick**: shamir(7,G,13,5G)==72G, zero scalar edges
- **Multi-scalar mul**: 1 point, 3 points (2G+6G+15G=23G), 0 points=infinity, G+(-G)=infinity
- **Schnorr batch**: 5 valid pass, individual agrees, corrupted sig#2 detected, identify finds #2, empty=true, single entry
- **ECDSA batch**: 4 valid pass, corrupted sig#1 detected, identify finds #1
### [45/45] Performance Smoke -- PASS
Sign/verify roundtrip timing sanity check.
---
## Additional CTest Targets (Outside Unified Audit)
These tests run as separate CTest executables and are included in the 24/24 CTest pass:
| Target | What it tests |
|--------|---------------|
| `secp256k1_doubling_equivalence` | dbl(P) == add(P, P) for many points |
| `secp256k1_add_jacobian_vs_affine` | Jacobian addition matches affine addition |
| `secp256k1_generator_vs_generic_small` | generator_mul(k) matches generic scalar_mul(G, k) for small k |
---
## Platform Results
| Platform | Compiler | Tests | Result |
|----------|----------|-------|--------|
| X64 (Windows) | Clang 21.1.0 | 24/24 CTest, 46/46 audit | **ALL PASS** |
| ARM64 (QEMU) | Cross-compiled | 24/24 CTest | **ALL PASS** |
| RISC-V (QEMU) | Cross-compiled | 24/24 CTest | **ALL PASS** |
| RISC-V (Mars HW, JH7110 U74) | Clang 21.1.8 | 46/46 unified audit | **ALL PASS** |
---
## How to Run
```bash
# Configure
cmake -S Secp256K1fast -B build_rel -G Ninja -DCMAKE_BUILD_TYPE=Release
# Build
cmake --build build_rel -j
# Run all CTest targets
ctest --test-dir build_rel --output-on-failure
# Run unified audit only
./build_rel/audit/unified_audit_runner
```
---
*Generated from unified_audit_runner v3.14.0 output on 2026-02-25.*

130
AUDIT_GUIDE.md
View File

@ -1,6 +1,6 @@
# Audit Guide
**UltrafastSecp256k1 v3.12.1** — Independent Auditor Navigation
**UltrafastSecp256k1 v3.12.1** -- Independent Auditor Navigation
> This document is for auditors. Here you will find everything needed
> to evaluate the library's security, correctness, and quality.
@ -54,59 +54,59 @@ ctest --test-dir build -T memcheck
```
UltrafastSecp256k1/
│
├── cpu/ ★ PRIMARY AUDIT TARGET
│ ├── include/secp256k1/ — Public API headers
│ │ ├── field.hpp — FieldElement (𝔽ₚ, 4×64-bit limbs)
│ │ ├── scalar.hpp — Scalar (ℤₙ, 4×64-bit limbs)
│ │ ├── point.hpp — EC Point (Jacobian + Affine)
│ │ ├── ecdsa.hpp — ECDSA (RFC 6979)
│ │ ├── schnorr.hpp — Schnorr (BIP-340)
│ │ ├── sha256.hpp — SHA-256
│ │ ├── glv.hpp — GLV endomorphism
│ │ ├── ct/ — Constant-time layer
│ │ │ ├── ops.hpp — CT arithmetic primitives
│ │ │ ├── field.hpp — CT field operations
│ │ │ ├── scalar.hpp — CT scalar operations
│ │ │ └── point.hpp — CT point multiplication
│ │ └── field_branchless.hpp — Branchless field select/cmov
│ ├── src/ — Implementations
│ │ ├── field.cpp — Field arithmetic (mul, sqr, inv)
│ │ ├── field_asm_x64.asm — x86-64 BMI2/ADX assembly
│ │ ├── field_asm_arm64.cpp — ARM64 MUL/UMULH intrinsics
│ │ ├── field_asm_riscv64.S — RISC-V RV64GC assembly
│ │ ├── precompute.cpp — GLV decomposition, generator table
│ │ ├── ecdsa.cpp — ECDSA implementation
│ │ └── schnorr.cpp — Schnorr implementation
│ ├── tests/ — Unit tests
│ │ ├── test_comprehensive.cpp — 25+ test categories
│ │ ├── test_ct.cpp — CT-layer correctness
│ │ └── ...
│ └── fuzz/ — libFuzzer harnesses
│ ├── fuzz_field.cpp — Field arithmetic fuzzing
│ ├── fuzz_scalar.cpp — Scalar arithmetic fuzzing
│ └── fuzz_point.cpp — Point operation fuzzing
│
├── tests/ ★ AUDIT-SPECIFIC TEST SUITES
│ ├── audit_field.cpp — 264,000+ field arithmetic checks
│ ├── audit_scalar.cpp — 93,000+ scalar arithmetic checks
│ ├── audit_point.cpp — 116,000+ point operation checks
│ ├── audit_ct.cpp — 120,000+ constant-time checks
│ ├── audit_fuzz.cpp — 15,000+ fuzz-generated checks
│ ├── audit_perf.cpp — Performance benchmarks
│ ├── audit_security.cpp — 17,000+ security-focused checks
│ ├── audit_integration.cpp — 13,000+ integration checks
│ └── test_ct_sidechannel.cpp — dudect-style timing analysis (1300+ lines)
│
├── cuda/ / opencl/ / metal/ — GPU backends (NOT constant-time)
├── wasm/ — WebAssembly (Emscripten)
├── compat/libsecp256k1_shim/ — libsecp256k1 API compatibility
│
├── THREAT_MODEL.md — Layer-by-layer risk assessment
├── AUDIT_REPORT.md — Internal audit: 641,194 checks
├── SECURITY.md — Security policy + status
├── CHANGELOG.md — Version history
└── CITATION.cff — Academic citation
|
+-- cpu/ ★ PRIMARY AUDIT TARGET
| +-- include/secp256k1/ -- Public API headers
| | +-- field.hpp -- FieldElement (𝔽ₚ, 4x64-bit limbs)
| | +-- scalar.hpp -- Scalar (ℤ_n, 4x64-bit limbs)
| | +-- point.hpp -- EC Point (Jacobian + Affine)
| | +-- ecdsa.hpp -- ECDSA (RFC 6979)
| | +-- schnorr.hpp -- Schnorr (BIP-340)
| | +-- sha256.hpp -- SHA-256
| | +-- glv.hpp -- GLV endomorphism
| | +-- ct/ -- Constant-time layer
| | | +-- ops.hpp -- CT arithmetic primitives
| | | +-- field.hpp -- CT field operations
| | | +-- scalar.hpp -- CT scalar operations
| | | +-- point.hpp -- CT point multiplication
| | +-- field_branchless.hpp -- Branchless field select/cmov
| +-- src/ -- Implementations
| | +-- field.cpp -- Field arithmetic (mul, sqr, inv)
| | +-- field_asm_x64.asm -- x86-64 BMI2/ADX assembly
| | +-- field_asm_arm64.cpp -- ARM64 MUL/UMULH intrinsics
| | +-- field_asm_riscv64.S -- RISC-V RV64GC assembly
| | +-- precompute.cpp -- GLV decomposition, generator table
| | +-- ecdsa.cpp -- ECDSA implementation
| | +-- schnorr.cpp -- Schnorr implementation
| +-- tests/ -- Unit tests
| | +-- test_comprehensive.cpp -- 25+ test categories
| | +-- test_ct.cpp -- CT-layer correctness
| | +-- ...
| +-- fuzz/ -- libFuzzer harnesses
| +-- fuzz_field.cpp -- Field arithmetic fuzzing
| +-- fuzz_scalar.cpp -- Scalar arithmetic fuzzing
| +-- fuzz_point.cpp -- Point operation fuzzing
|
+-- tests/ ★ AUDIT-SPECIFIC TEST SUITES
| +-- audit_field.cpp -- 264,000+ field arithmetic checks
| +-- audit_scalar.cpp -- 93,000+ scalar arithmetic checks
| +-- audit_point.cpp -- 116,000+ point operation checks
| +-- audit_ct.cpp -- 120,000+ constant-time checks
| +-- audit_fuzz.cpp -- 15,000+ fuzz-generated checks
| +-- audit_perf.cpp -- Performance benchmarks
| +-- audit_security.cpp -- 17,000+ security-focused checks
| +-- audit_integration.cpp -- 13,000+ integration checks
| +-- test_ct_sidechannel.cpp -- dudect-style timing analysis (1300+ lines)
|
+-- cuda/ / opencl/ / metal/ -- GPU backends (NOT constant-time)
+-- wasm/ -- WebAssembly (Emscripten)
+-- compat/libsecp256k1_shim/ -- libsecp256k1 API compatibility
|
+-- THREAT_MODEL.md -- Layer-by-layer risk assessment
+-- AUDIT_REPORT.md -- Internal audit: 641,194 checks
+-- SECURITY.md -- Security policy + status
+-- CHANGELOG.md -- Version history
+-- CITATION.cff -- Academic citation
```
---
@ -115,11 +115,11 @@ UltrafastSecp256k1/
### Path A: Field Arithmetic Correctness
**Goal**: Verify all field operations mod p = 2²⁵⁶ − 2³² − 977
**Goal**: Verify all field operations mod p = 2^2⁵⁶ - 2^3^2 - 977
| Step | File | What to Check |
|------|------|---------------|
| 1 | `cpu/include/secp256k1/field.hpp` | FieldElement class, 4×64 limb layout |
| 1 | `cpu/include/secp256k1/field.hpp` | FieldElement class, 4x64 limb layout |
| 2 | `cpu/src/field.cpp` | `add_impl`, `sub_impl`, `mul_impl`, `square_impl`, `normalize` |
| 3 | `cpu/src/field.cpp` | `from_bytes` (big-endian), `from_limbs` (little-endian) |
| 4 | `cpu/src/field.cpp` | Inversion: SafeGCD (Bernstein-Yang divsteps) |
@ -134,7 +134,7 @@ UltrafastSecp256k1/
| Step | File | What to Check |
|------|------|---------------|
| 1 | `cpu/include/secp256k1/scalar.hpp` | Scalar class, 4×64 limb layout |
| 1 | `cpu/include/secp256k1/scalar.hpp` | Scalar class, 4x64 limb layout |
| 2 | `cpu/src/scalar.cpp` | add, sub, mul, inverse, negate |
| 3 | `tests/audit_scalar.cpp` | 93K checks: ring properties, boundary values |
| 4 | `cpu/fuzz/fuzz_scalar.cpp` | Fuzz: add/sub, mul identity, distributive |
@ -195,7 +195,7 @@ UltrafastSecp256k1/
## 4. What Exists vs What's Planned
### ✅ Implemented Security Measures
### [OK] Implemented Security Measures
| Measure | Status | Details |
|---------|--------|---------|
@ -216,7 +216,7 @@ UltrafastSecp256k1/
| dudect timing analysis | Active | Welch t-test for CT layer |
| Internal audit suite | Active | 641,194 checks, 8 suites |
### ⚠️ Known Gaps (Transparency)
### [!] Known Gaps (Transparency)
| Gap | Priority | Notes |
|-----|----------|-------|
@ -225,7 +225,7 @@ UltrafastSecp256k1/
| FROST protocol-level tests | Medium | Multi-party simulation needed |
| MuSig2 extended test vectors | Medium | Reference impl vectors needed |
| Cross-ABI / FFI tests | Low | Different calling conventions |
| Hardware timing analysis | Low | Multiple µarch planned |
| Hardware timing analysis | Low | Multiple uarch planned |
| GPU constant-time | N/A | By design: GPU is for public data |
---
@ -240,7 +240,7 @@ UltrafastSecp256k1/
| Clang-Tidy | `clang-tidy.yml` | push/PR | 30+ static analysis checks |
| CodeQL | `codeql.yml` | push/PR/cron | Security + quality queries |
| Dependency Review | `dependency-review.yml` | PR | Vulnerable dependency scanning |
| Docs | `docs.yml` | push | Doxygen → GitHub Pages |
| Docs | `docs.yml` | push | Doxygen -> GitHub Pages |
| Packaging | `packaging.yml` | push/PR | Debian/RPM/Arch packaging |
| Release | `release.yml` | tag | Build + sign release artifacts |
| Scorecard | `scorecard.yml` | cron | OpenSSF supply-chain assessment |
@ -260,9 +260,9 @@ From [AUDIT_REPORT.md](AUDIT_REPORT.md) (v3.9.0):
| `audit_point` | 116,312 | Point ops: on-curve, group law, scalar mul, compress/decompress |
| `audit_ct` | 120,128 | CT layer: timing-safe ops, no secret-dependent branches |
| `audit_fuzz` | 15,423 | Fuzz-generated: random input correctness |
| `audit_perf` | — | Performance benchmarks (not a correctness check) |
| `audit_perf` | -- | Performance benchmarks (not a correctness check) |
| `audit_security` | 17,856 | Security: nonce, validation, edge cases |
| `audit_integration` | 13,144 | End-to-end: sign → verify, derive → use |
| `audit_integration` | 13,144 | End-to-end: sign -> verify, derive -> use |
| **Total** | **641,194** | |
---
@ -303,7 +303,7 @@ clang++ -fsanitize=fuzzer,address -O2 -std=c++20 \
- [ ] **Field arithmetic**: verify reduction mod p is correct in `normalize()`
- [ ] **Scalar arithmetic**: verify reduction mod n is correct
- [ ] **Point addition**: verify complete addition formula handles all edge cases
- [ ] **GLV decomposition**: verify k1 + k2·λ ≡ k (mod n) for random scalars
- [ ] **GLV decomposition**: verify k1 + k2*lambda == k (mod n) for random scalars
- [ ] **ECDSA nonce**: verify RFC 6979 determinism
- [ ] **Schnorr**: verify BIP-340 tagged hashing
- [ ] **CT layer**: no secret-dependent branches (manual code review)
@ -323,4 +323,4 @@ clang++ -fsanitize=fuzzer,address -O2 -std=c++20 \
---
*UltrafastSecp256k1 v3.12.1 — Audit Guide*
*UltrafastSecp256k1 v3.12.1 -- Audit Guide*

94
AUDIT_REPORT.md
View File

@ -1,4 +1,4 @@
# UltrafastSecp256k1 — Cryptographic Audit Report
# UltrafastSecp256k1 -- Cryptographic Audit Report
**Library Version:** 3.9.0
**Audit Date:** 2026-02-11
@ -13,15 +13,15 @@
1. [Executive Summary](#1-executive-summary)
2. [Audit Architecture](#2-audit-architecture)
3. [Section I — Mathematical Correctness](#3-section-i--mathematical-correctness)
3. [Section I -- Mathematical Correctness](#3-section-i--mathematical-correctness)
- [I.1 Field Arithmetic](#31-field-arithmetic)
- [I.2 Scalar Arithmetic](#32-scalar-arithmetic)
- [I.3 Point Operations & Signatures](#33-point-operations--signatures)
4. [Section II — Constant-Time & Side-Channel](#4-section-ii--constant-time--side-channel)
5. [Section III — Fuzzing & Adversarial Testing](#5-section-iii--fuzzing--adversarial-testing)
6. [Section IV — Performance Validation](#6-section-iv--performance-validation)
7. [Section V — Security Hardening](#7-section-v--security-hardening)
8. [Section VI — Integration Testing](#8-section-vi--integration-testing)
4. [Section II -- Constant-Time & Side-Channel](#4-section-ii--constant-time--side-channel)
5. [Section III -- Fuzzing & Adversarial Testing](#5-section-iii--fuzzing--adversarial-testing)
6. [Section IV -- Performance Validation](#6-section-iv--performance-validation)
7. [Section V -- Security Hardening](#7-section-v--security-hardening)
8. [Section VI -- Integration Testing](#8-section-vi--integration-testing)
9. [Coverage Matrix](#9-coverage-matrix)
10. [How to Run](#10-how-to-run)
11. [Full CTest Summary](#11-full-ctest-summary)
@ -54,7 +54,7 @@ performance characteristics, security hardening, and cross-module integration.
| audit_point | 116,124 | 0 | 1.71s |
| audit_ct | 120,652 | 0 | 0.93s |
| audit_fuzz | 15,461 | 0 | 0.53s |
| audit_perf | (benchmark) | — | 1.19s |
| audit_perf | (benchmark) | -- | 1.19s |
| audit_security | 17,309 | 0 | 17.26s |
| audit_integration | 13,811 | 0 | 1.62s |
| **Total** | **641,194** | **0** | **~24s** |
@ -80,7 +80,7 @@ All test sources reside in `libs/UltrafastSecp256k1/tests/`:
### Design Principles
- **Deterministic**: Fixed PRNG seeds (`0xA0D17'xxxxx` family) — same results every run
- **Deterministic**: Fixed PRNG seeds (`0xA0D17'xxxxx` family) -- same results every run
- **Self-contained**: Each test is a standalone binary, no external data dependencies
- **Zero heap in hot checks**: Test harness itself may allocate; checked code does not
- **Layered coverage**: Random + boundary + adversarial + known-vector + cross-module
@ -101,7 +101,7 @@ Each suite uses a distinct deterministic seed for reproducibility:
---
## 3. Section I — Mathematical Correctness
## 3. Section I -- Mathematical Correctness
### 3.1 Field Arithmetic
@ -111,7 +111,7 @@ Each suite uses a distinct deterministic seed for reproducibility:
| # | Test | Checks | What it validates |
|---|---|---:|---|
| 1 | Addition mod p — overflow paths | 3,101 | `p-1 + 1`, `p-1 + p-1`, `x + 0`, random pairs |
| 1 | Addition mod p -- overflow paths | 3,101 | `p-1 + 1`, `p-1 + p-1`, `x + 0`, random pairs |
| 2 | Subtraction borrow-chain | 6,102 | `0 - x`, `x - x == 0`, cross-subtraction-addition consistency |
| 3 | Multiplication carry propagation | 11,102 | Mul-by-1, mul-by-0, commutativity, large operands |
| 4 | Square vs Mul equivalence (10K) | 21,104 | `sqr(x) == mul(x,x)` for 10,000 random elements |
@ -119,7 +119,7 @@ Each suite uses a distinct deterministic seed for reproducibility:
| 6 | Canonical representation (10K) | 42,106 | `to_bytes(from_bytes(x))` round-trip canonical check |
| 7 | Limb boundary stress | 43,109 | Single-limb set values (0, 1, UINT64_MAX) |
| 8 | Inverse correctness (10K) | 54,110 | `x * inv(x) == 1` for 10,000 random non-zero elements |
| 9 | Square root | 64,110 | `sqrt(x²) == ±x`, ~50% existence rate on random inputs |
| 9 | Square root | 64,110 | `sqrt(x^2) == +-x`, ~50% existence rate on random inputs |
| 10 | Batch inverse | 64,622 | `batch_inv` matches per-element `inv` |
| 11 | Random cross-check (100K) | 264,622 | 100K mixed operations: add, sub, mul, sqr consistency |
@ -136,8 +136,8 @@ Each suite uses a distinct deterministic seed for reproducibility:
| # | Test | Checks | What it validates |
|---|---|---:|---|
| 1 | Scalar mod n reduction | 10,003 | Values above group order n reduce correctly |
| 2 | Overflow normalization (10K) | 10,003 | `from_bytes → to_bytes` round-trip preserves canonical form |
| 3 | Edge scalar handling | 10,210 | Scalars: 0, 1, n-1, n, n+1 — correct reduction |
| 2 | Overflow normalization (10K) | 10,003 | `from_bytes -> to_bytes` round-trip preserves canonical form |
| 3 | Edge scalar handling | 10,210 | Scalars: 0, 1, n-1, n, n+1 -- correct reduction |
| 4 | Arithmetic laws (10K) | 60,210 | Commutativity, associativity, distributivity (add, mul) |
| 5 | Scalar inverse (10K) | 71,210 | `s * inv(s) == 1` for random non-zero scalars |
| 6 | GLV split via point arithmetic (1K) | 73,210 | `k*G == k1*G + k2*(lambda*G)` algebraic split correctness |
@ -145,7 +145,7 @@ Each suite uses a distinct deterministic seed for reproducibility:
| 8 | Negate self-consistency (10K) | 93,215 | `s + neg(s) == 0`, `neg(neg(s)) == s` |
**Key Finding:** GLV decomposition verified algebraically through actual point arithmetic,
not just scalar-level checks — confirming endomorphism correctness.
not just scalar-level checks -- confirming endomorphism correctness.
---
@ -161,12 +161,12 @@ not just scalar-level checks — confirming endomorphism correctness.
| 2 | Jacobian add (1K+500) | 1,508 | P+Q correctness, associativity sampling |
| 3 | Jacobian double | 1,512 | 2P via `dbl` matches `add(P,P)` |
| 4 | P+P via add (H=0) | 1,612 | Special case: add function handles doubling case |
| 5 | P+(-P) == O (1K) | 3,614 | Point negation → additive inverse |
| 6 | Affine conversion (1K) | 7,614 | Jacobian→Affine round-trip + on-curve check (y²=x³+7) |
| 5 | P+(-P) == O (1K) | 3,614 | Point negation -> additive inverse |
| 6 | Affine conversion (1K) | 7,614 | Jacobian->Affine round-trip + on-curve check (y^2=x^3+7) |
| 7 | Scalar mul identities (1K+500) | 9,114 | `1*P==P`, `0*P==O`, `(a+b)*P==a*P+b*P` |
| 8 | Known K*G vectors | 9,124 | NIST/known test vectors for generator multiplication |
| 9 | ECDSA round-trip (1K) | 14,124 | sign → verify for 1,000 random (key, message) pairs |
| 10 | Schnorr BIP-340 round-trip (1K) | 16,124 | BIP-340 sign → verify for 1,000 random pairs |
| 9 | ECDSA round-trip (1K) | 14,124 | sign -> verify for 1,000 random (key, message) pairs |
| 10 | Schnorr BIP-340 round-trip (1K) | 16,124 | BIP-340 sign -> verify for 1,000 random pairs |
| 11 | 100K point operation stress | 116,124 | Mixed add/dbl/scalar-mul, zero infinity-hit rate |
**Key Findings:**
@ -175,7 +175,7 @@ not just scalar-level checks — confirming endomorphism correctness.
---
## 4. Section II — Constant-Time & Side-Channel
## 4. Section II -- Constant-Time & Side-Channel
**File:** `audit_ct.cpp`
**Checks:** 120,652
@ -185,7 +185,7 @@ not just scalar-level checks — confirming endomorphism correctness.
|---|---|---:|---|
| 1 | CT mask generation | 12 | `ct_mask_if`, `ct_select` for 0/1/edge values |
| 2 | CT cmov/cswap (10K) | 30,012 | Conditional move/swap produce correct results |
| 3 | CT table lookup (256-bit) | 30,028 | Table scan vs direct access — identical results |
| 3 | CT table lookup (256-bit) | 30,028 | Table scan vs direct access -- identical results |
| 4 | CT field ops differential (10K) | 81,028 | `ct::field_add/sub/mul/sqr/inv == fast::` equivalents |
| 5 | CT scalar ops differential (10K) | 111,028 | `ct::scalar_add/sub/mul/inv == fast::` equivalents |
| 6 | CT scalar cmov/cswap (1K) | 113,028 | Scalar conditional operations correctness |
@ -200,14 +200,14 @@ not just scalar-level checks — confirming endomorphism correctness.
**Timing Measurement:**
- `k=1` average: 363,380 ns
- `k=n-1` average: 351,039 ns
- **Ratio: 1.035** (ideal ≈ 1.0, concern threshold > 1.2)
- **Ratio: 1.035** (ideal ~= 1.0, concern threshold > 1.2)
**Note:** This is a statistical sanity check, not a formal side-channel evaluation.
Proper constant-time verification requires tools like `dudect` or hardware timing analysis.
---
## 5. Section III — Fuzzing & Adversarial Testing
## 5. Section III -- Fuzzing & Adversarial Testing
**File:** `audit_fuzz.cpp`
**Checks:** 15,461
@ -216,14 +216,14 @@ Proper constant-time verification requires tools like `dudect` or hardware timin
| # | Test | Checks | What it validates |
|---|---|---:|---|
| 1 | Malformed public key rejection | 3 | Off-curve points, wrong prefix bytes |
| 2 | Invalid ECDSA signatures | 7 | r=0, s=0, r=n, s=n — all rejected |
| 2 | Invalid ECDSA signatures | 7 | r=0, s=0, r=n, s=n -- all rejected |
| 3 | Invalid Schnorr signatures | 11 | Corrupted nonce, wrong tag, zero R |
| 4 | Oversized scalars | 15 | Values > n are reduced, not accepted raw |
| 5 | Boundary field elements | 19 | 0, p, p-1, p+1, all-ones |
| 6 | ECDSA recovery edge cases (1K) | 4,769 | Recovery ID sweep, wrong-ID rejection |
| 7 | Random state fuzzing (10K) | 6,461 | 10K random (key, msg) → sign, verify, no crash |
| 8 | DER round-trip (1K) | 9,461 | ECDSA signatures: DER encode → decode → same |
| 9 | Schnorr bytes round-trip (1K) | 11,461 | 64-byte serialization → deserialization == original |
| 7 | Random state fuzzing (10K) | 6,461 | 10K random (key, msg) -> sign, verify, no crash |
| 8 | DER round-trip (1K) | 9,461 | ECDSA signatures: DER encode -> decode -> same |
| 9 | Schnorr bytes round-trip (1K) | 11,461 | 64-byte serialization -> deserialization == original |
| 10 | Signature normalization / low-S (1K) | 15,461 | Verify `s` is in lower half after signing |
**Key Finding:** All malformed/adversarial inputs were correctly rejected.
@ -231,7 +231,7 @@ No crashes or undefined behavior observed across 10K random operations.
---
## 6. Section IV — Performance Validation
## 6. Section IV -- Performance Validation
**File:** `audit_perf.cpp`
**Type:** Benchmark (no pass/fail assertions)
@ -270,12 +270,12 @@ No crashes or undefined behavior observed across 10K random operations.
- Field operations: ~23-96M op/s (well-optimized 64-bit limbs)
- ECDSA signing: ~98K op/s; verification: ~34K op/s
- Schnorr (BIP-340): ~51K sign, ~24K verify
- CT scalar_mul is ~44x slower than fast path — expected for constant-time guarantees
- CT scalar_mul is ~44x slower than fast path -- expected for constant-time guarantees
- Point doubling is ~2.3x faster than point addition (expected: fewer field muls)
---
## 7. Section V — Security Hardening
## 7. Section V -- Security Hardening
**File:** `audit_security.cpp`
**Checks:** 17,309
@ -285,24 +285,24 @@ No crashes or undefined behavior observed across 10K random operations.
|---|---|---:|---|
| 1 | Zero/identity key handling | 5 | `inverse(0)` throws; `0*G == O`; zero-key signing fails |
| 2 | Secret zeroization (ct_memzero) | 8 | Memory is zeroed after `ct_memzero` call |
| 3 | Bit-flip resilience (1K) | 2,008 | Single-bit flip in signature → verify fails |
| 4 | Message bit-flip detection (1K) | 3,008 | Single-bit flip in message → verify fails |
| 5 | Nonce determinism (RFC 6979) | 3,109 | Same (key, msg) → same signature; different msg → different sig |
| 3 | Bit-flip resilience (1K) | 2,008 | Single-bit flip in signature -> verify fails |
| 4 | Message bit-flip detection (1K) | 3,008 | Single-bit flip in message -> verify fails |
| 5 | Nonce determinism (RFC 6979) | 3,109 | Same (key, msg) -> same signature; different msg -> different sig |
| 6 | Serialization round-trip (3K) | 10,109 | Compressed, uncompressed, x-only point serialization |
| 7 | Compact recovery serialization (1K) | 12,109 | Compact ECDSA sig → recover → matches original pubkey |
| 7 | Compact recovery serialization (1K) | 12,109 | Compact ECDSA sig -> recover -> matches original pubkey |
| 8 | Double-ops idempotency (2K) | 14,209 | sign-twice == same; verify-twice == same |
| 9 | Cross-algorithm consistency | 14,309 | Same key works for both ECDSA and Schnorr |
| 10 | High-S detection (1K) | 17,309 | Library enforces low-S normalization per BIP-62 |
**Key Findings:**
- Library correctly throws on `inverse(0)` — no silent zero return
- Library correctly throws on `inverse(0)` -- no silent zero return
- 100% bit-flip detection rate on both signatures and messages
- RFC 6979 deterministic nonce generation confirmed
- Low-S enforcement verified across 1,000 random signatures
---
## 8. Section VI — Integration Testing
## 8. Section VI -- Integration Testing
**File:** `audit_integration.cpp`
**Checks:** 13,811
@ -313,7 +313,7 @@ No crashes or undefined behavior observed across 10K random operations.
| 1 | ECDH key exchange symmetry (1K) | 4,001 | `ECDH(a, b*G) == ECDH(b, a*G)` for hashed, x-only, and raw |
| 2 | Schnorr batch verification | 4,006 | 100 valid sigs batch-verify; corrupt detection + identify_invalid |
| 3 | ECDSA batch verification | 4,009 | 100 valid sigs batch-verify; corrupt detection + identify_invalid |
| 4 | ECDSA full round-trip (1K) | 10,009 | sign → recover pubkey → verify → DER encode/decode |
| 4 | ECDSA full round-trip (1K) | 10,009 | sign -> recover pubkey -> verify -> DER encode/decode |
| 5 | Schnorr cross-path (500) | 11,010 | Individual verify == batch verify results |
| 6 | Fast vs CT integration (500) | 12,510 | `fast::scalar_mul == ct::scalar_mul`, ECDSA verify on fast-signed |
| 7 | Combined ECDH + ECDSA protocol (100) | 13,010 | Full key-exchange + signing protocol flow |
@ -353,16 +353,16 @@ This matrix maps the audit checklist categories to specific test functions and c
| API Module | Covered? | Notes |
|---|---|---|
| `FieldElement` | ✅ Full | add, sub, mul, sqr, inv, sqrt, batch_inv, from_bytes, to_bytes, from_limbs |
| `Scalar` | ✅ Full | add, sub, mul, inv, negate, from_hex, to_bytes, glv_split |
| `Point` | ✅ Full | jac_add, jac_dbl, scalar_mul, to_affine, generator, infinity |
| `ECDSA` | ✅ Full | sign, verify, recover, DER encode/decode, compact format |
| `Schnorr` | ✅ Full | sign, verify, 64-byte serialization |
| `ECDH` | ✅ Full | hashed, x-only, raw variants |
| `BatchVerify` | ✅ Full | schnorr_batch_verify, ecdsa_batch_verify, identify_invalid |
| `CT layer` | ✅ Full | ct_ops, ct_field, ct_scalar, ct_point, ct_utils |
| `Recovery` | ✅ Full | All recovery IDs, wrong-ID rejection |
| `FROST` | ⚠️ Not tested | Threshold signature module — requires multi-party protocol simulation |
| `FieldElement` | [OK] Full | add, sub, mul, sqr, inv, sqrt, batch_inv, from_bytes, to_bytes, from_limbs |
| `Scalar` | [OK] Full | add, sub, mul, inv, negate, from_hex, to_bytes, glv_split |
| `Point` | [OK] Full | jac_add, jac_dbl, scalar_mul, to_affine, generator, infinity |
| `ECDSA` | [OK] Full | sign, verify, recover, DER encode/decode, compact format |
| `Schnorr` | [OK] Full | sign, verify, 64-byte serialization |
| `ECDH` | [OK] Full | hashed, x-only, raw variants |
| `BatchVerify` | [OK] Full | schnorr_batch_verify, ecdsa_batch_verify, identify_invalid |
| `CT layer` | [OK] Full | ct_ops, ct_field, ct_scalar, ct_point, ct_utils |
| `Recovery` | [OK] Full | All recovery IDs, wrong-ID rejection |
| `FROST` | [!] Not tested | Threshold signature module -- requires multi-party protocol simulation |
---

498
CHANGELOG.md
View File

@ -7,104 +7,104 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
## [3.14.0] - 2026-02-25
### Added — Language Bindings (12 languages, 41-function C API parity)
- **Java** — 22 new JNI functions + 3 helper classes (`RecoverableSignature`, `WifDecoded`, `TaprootOutputKeyResult`): full coverage of ECDSA sign/verify, DER encoding, recovery, ECDH, Schnorr, BIP-32, BIP-39, taproot, WIF, address encoding, tagged hash
- **Swift** — 20 new functions: DER encode/decode, recovery sign/recover, ECDH, tagged hash, BIP-32/39, taproot, WIF, address encoding
- **React Native** — 15 new functions: DER, recovery, ECDH, Schnorr, BIP-32/39, taproot, WIF, address, tagged hash
- **Python** — 3 new functions: `ctx_clone()`, `last_error()`, `last_error_msg()`
- **Rust** — 2 new functions: `last_error()`, `last_error_msg()`
- **Dart** — 1 new function: `ctx_clone()`
- **Go, Node.js, C#, Ruby, PHP** — already complete (verified, no changes needed)
- **9 new binding READMEs** — `c_api`, `dart`, `go`, `java`, `php`, `python`, `ruby`, `rust`, `swift`
- **Selftest report API** — `SelftestReport` and `SelftestCase` structs in `selftest.hpp`; `tally()` refactored for programmatic reporting
### Added -- Language Bindings (12 languages, 41-function C API parity)
- **Java** -- 22 new JNI functions + 3 helper classes (`RecoverableSignature`, `WifDecoded`, `TaprootOutputKeyResult`): full coverage of ECDSA sign/verify, DER encoding, recovery, ECDH, Schnorr, BIP-32, BIP-39, taproot, WIF, address encoding, tagged hash
- **Swift** -- 20 new functions: DER encode/decode, recovery sign/recover, ECDH, tagged hash, BIP-32/39, taproot, WIF, address encoding
- **React Native** -- 15 new functions: DER, recovery, ECDH, Schnorr, BIP-32/39, taproot, WIF, address, tagged hash
- **Python** -- 3 new functions: `ctx_clone()`, `last_error()`, `last_error_msg()`
- **Rust** -- 2 new functions: `last_error()`, `last_error_msg()`
- **Dart** -- 1 new function: `ctx_clone()`
- **Go, Node.js, C#, Ruby, PHP** -- already complete (verified, no changes needed)
- **9 new binding READMEs** -- `c_api`, `dart`, `go`, `java`, `php`, `python`, `ruby`, `rust`, `swift`
- **Selftest report API** -- `SelftestReport` and `SelftestCase` structs in `selftest.hpp`; `tally()` refactored for programmatic reporting
### Fixed — Documentation & Packaging
- **Package naming corrected across all documentation** — `libsecp256k1-fast*` → `libufsecp*` (apt, rpm, arch); CMake target `secp256k1-fast-cpu` → `secp256k1::fast`; linker flag `-lsecp256k1-fast-cpu` → `-lfastsecp256k1`; pkg-config Libs `-lsecp256k1-fast-cpu` → `-lfastsecp256k1`
- **RPM spec renamed** — `libsecp256k1-fast.spec` → `libufsecp.spec`
- **Debian control** — source `libufsecp`, binary packages `libufsecp3`/`libufsecp-dev`
- **Arch PKGBUILD** — `pkgname=libufsecp`, `provides=('libufsecp')`
- **3 existing binding READMEs fixed** — Node.js, C#, React Native: removed inaccurate CT-layer claims (C API uses fast:: path only)
- **README dead link** — `INDUSTRIAL_ROADMAP_WORKING.md` → `ROADMAP.md`
### Fixed -- Documentation & Packaging
- **Package naming corrected across all documentation** -- `libsecp256k1-fast*` -> `libufsecp*` (apt, rpm, arch); CMake target `secp256k1-fast-cpu` -> `secp256k1::fast`; linker flag `-lsecp256k1-fast-cpu` -> `-lfastsecp256k1`; pkg-config Libs `-lsecp256k1-fast-cpu` -> `-lfastsecp256k1`
- **RPM spec renamed** -- `libsecp256k1-fast.spec` -> `libufsecp.spec`
- **Debian control** -- source `libufsecp`, binary packages `libufsecp3`/`libufsecp-dev`
- **Arch PKGBUILD** -- `pkgname=libufsecp`, `provides=('libufsecp')`
- **3 existing binding READMEs fixed** -- Node.js, C#, React Native: removed inaccurate CT-layer claims (C API uses fast:: path only)
- **README dead link** -- `INDUSTRIAL_ROADMAP_WORKING.md` -> `ROADMAP.md`
### Fixed — CI / Build
- **`-Werror=unused-function`** — added `[[maybe_unused]]` to `get_platform_string()` in `selftest.cpp`
- **Scorecard CI** — pinned `ubuntu:24.04` by SHA digest in `Dockerfile.local-ci`
### Fixed -- CI / Build
- **`-Werror=unused-function`** -- added `[[maybe_unused]]` to `get_platform_string()` in `selftest.cpp`
- **Scorecard CI** -- pinned `ubuntu:24.04` by SHA digest in `Dockerfile.local-ci`
---
## [3.13.1] - 2026-02-24
### Fixed
- **Critical: GLV decomposition overflow in `ct::scalar_mul()`** — `ct_mul_256x_lo128_mod` used single-phase reduction (256×128-bit), which overflowed when GLV's `c1`/`c2` rounded to exactly 2^128. Additionally, `lambda*k2` computation only read 2 lower limbs of `k2_abs`, silently dropping `limb[2]=1`. This caused wrong results for ~5/64 random scalar inputs. Replaced with full `ct_scalar_mul_mod_n()`: 4×4 schoolbook → 8-limb product → 3-phase `reduce_512` (512→385→258→256 bits), matching libsecp256k1's algorithm. Both `5×52` (`__int128`) and `4×64` (portable `U128`/`mul64`) paths fixed.
- **GLV constant `minus_b2`** — changed from 128-bit `b2_pos` to full 256-bit `Scalar(n - b2)`, and decomposition formula from `scalar_sub(p1, p2)` to `scalar_add(p1, p2)` since both constants are already negated
- **`-Werror=unused-function`** — added `[[maybe_unused]]` to diagnostic helpers `print_scalar()` and `print_point_xy()` in `diag_scalar_mul.cpp`
- **Critical: GLV decomposition overflow in `ct::scalar_mul()`** -- `ct_mul_256x_lo128_mod` used single-phase reduction (256x128-bit), which overflowed when GLV's `c1`/`c2` rounded to exactly 2^128. Additionally, `lambda*k2` computation only read 2 lower limbs of `k2_abs`, silently dropping `limb[2]=1`. This caused wrong results for ~5/64 random scalar inputs. Replaced with full `ct_scalar_mul_mod_n()`: 4x4 schoolbook -> 8-limb product -> 3-phase `reduce_512` (512->385->258->256 bits), matching libsecp256k1's algorithm. Both `5x52` (`__int128`) and `4x64` (portable `U128`/`mul64`) paths fixed.
- **GLV constant `minus_b2`** -- changed from 128-bit `b2_pos` to full 256-bit `Scalar(n - b2)`, and decomposition formula from `scalar_sub(p1, p2)` to `scalar_add(p1, p2)` since both constants are already negated
- **`-Werror=unused-function`** -- added `[[maybe_unused]]` to diagnostic helpers `print_scalar()` and `print_point_xy()` in `diag_scalar_mul.cpp`
### Removed
- Dead code: `ct_mul_lo128_mod()` and `ct_mul_256x_lo128_mod()` (replaced by `ct_scalar_mul_mod_n`)
### Performance
- CT scalar_mul overhead vs fast path: **1.05×** (25.3μs vs 24.0μs) — no regression
- CT scalar_mul overhead vs fast path: **1.05x** (25.3us vs 24.0us) -- no regression
---
## [3.13.0] - 2026-02-24
### Added
- **BIP-32 official test vectors TV1–TV5** — 90 comprehensive checks covering master key derivation, hardened/normal child paths, and public-only derivation chains (`test_bip32_vectors.cpp`)
- **Nightly CI workflow** — daily extended verification: differential correctness with 100× multiplier (~1.3M checks) and dudect full-mode statistical analysis (30 min, t=4.5 threshold)
- **Differential test CLI/env multiplier** — `differential_test` accepts `--multiplier=N` or `UFSECP_DIFF_MULTIPLIER` env variable; default 1 preserves existing CI behavior
- **BIP-32 official test vectors TV1-TV5** -- 90 comprehensive checks covering master key derivation, hardened/normal child paths, and public-only derivation chains (`test_bip32_vectors.cpp`)
- **Nightly CI workflow** -- daily extended verification: differential correctness with 100x multiplier (~1.3M checks) and dudect full-mode statistical analysis (30 min, t=4.5 threshold)
- **Differential test CLI/env multiplier** -- `differential_test` accepts `--multiplier=N` or `UFSECP_DIFF_MULTIPLIER` env variable; default 1 preserves existing CI behavior
### Fixed
- **BIP-32 public key decompression** — `public_key()` now correctly decompresses from compressed prefix + x-coordinate via y²=x³+7 square root with parity check; previously treated x-coordinate as scalar, producing wrong public keys for public-only derivation
- **`pub_prefix` field** in `ExtendedKey` — stores y-parity byte (0x02/0x03) across `to_public()`, `derive_child()`, and `serialize()` for correct compressed public key round-trip
- **SonarCloud `ct_sidechannel` exclusion** — changed `-E ct_sidechannel` to exact-match `-E "^ct_sidechannel$"` to prevent accidental exclusion of other tests
- **BIP-32 public key decompression** -- `public_key()` now correctly decompresses from compressed prefix + x-coordinate via y^2=x^3+7 square root with parity check; previously treated x-coordinate as scalar, producing wrong public keys for public-only derivation
- **`pub_prefix` field** in `ExtendedKey` -- stores y-parity byte (0x02/0x03) across `to_public()`, `derive_child()`, and `serialize()` for correct compressed public key round-trip
- **SonarCloud `ct_sidechannel` exclusion** -- changed `-E ct_sidechannel` to exact-match `-E "^ct_sidechannel$"` to prevent accidental exclusion of other tests
---
## [3.12.3] - 2026-02-24
### Fixed
- **Valgrind "still reachable" false positives** — added `valgrind.supp` suppression file for precomputed wNAF/comb table allocations that are intentionally kept for program lifetime
- **CTest memcheck integration** — switched from `enable_testing()` to `include(CTest)` for proper Valgrind memcheck support
- **Security audit CI** — added `--suppressions` flag and exact-match `ct_sidechannel` exclusion in Valgrind step
- **ASan heap-buffer-overflow** in dudect smoke mode — fixed buffer overread in timing analysis
- **aarch64 cross-compilation** — added missing toolchain file for ARM64 CI builds
- **Valgrind "still reachable" false positives** -- added `valgrind.supp` suppression file for precomputed wNAF/comb table allocations that are intentionally kept for program lifetime
- **CTest memcheck integration** -- switched from `enable_testing()` to `include(CTest)` for proper Valgrind memcheck support
- **Security audit CI** -- added `--suppressions` flag and exact-match `ct_sidechannel` exclusion in Valgrind step
- **ASan heap-buffer-overflow** in dudect smoke mode -- fixed buffer overread in timing analysis
- **aarch64 cross-compilation** -- added missing toolchain file for ARM64 CI builds
---
## [3.12.2] - 2026-02-24
### Security
- **Branchless `ct_compare`** — rewritten with bitwise arithmetic and `asm volatile` value barriers; dudect |t| dropped from 22.29 → 2.17, eliminating a timing side-channel leak
- **Branchless `ct_compare`** -- rewritten with bitwise arithmetic and `asm volatile` value barriers; dudect |t| dropped from 22.29 -> 2.17, eliminating a timing side-channel leak
### Fixed
- **SonarCloud coverage collection** — use `run_selftest` as primary llvm-cov binary (links full library); coverage report now reflects actual test execution
- **Dead code elimination in `precompute.cpp`** — `RDTSC()` gated behind `SECP256K1_PROFILE_DECOMP`; `multiply_u64`/`mul64x64`/`mul_256` unified to call `_umul128()` instead of duplicating `__int128` inline
- **GCC `#pragma clang diagnostic` warnings** — wrapped in `#ifdef __clang__` guards in 3 test files
- **GCC `-Wstringop-overflow`** — bounds check in `base58check_encode` (address.cpp)
- **All `-Werror` warnings resolved** — 41 files across library, tests, and benchmarks
- **Clang-tidy CI** — filter `.S` assembly from analysis, add `--quiet` and parallel `xargs`
- **Unused variable** — removed `compressed` in `bip32.cpp` `to_public()`
- **SonarCloud coverage collection** -- use `run_selftest` as primary llvm-cov binary (links full library); coverage report now reflects actual test execution
- **Dead code elimination in `precompute.cpp`** -- `RDTSC()` gated behind `SECP256K1_PROFILE_DECOMP`; `multiply_u64`/`mul64x64`/`mul_256` unified to call `_umul128()` instead of duplicating `__int128` inline
- **GCC `#pragma clang diagnostic` warnings** -- wrapped in `#ifdef __clang__` guards in 3 test files
- **GCC `-Wstringop-overflow`** -- bounds check in `base58check_encode` (address.cpp)
- **All `-Werror` warnings resolved** -- 41 files across library, tests, and benchmarks
- **Clang-tidy CI** -- filter `.S` assembly from analysis, add `--quiet` and parallel `xargs`
- **Unused variable** -- removed `compressed` in `bip32.cpp` `to_public()`
### Changed
- **`const` on hot-path intermediates** — ~60 `FieldElement52` write-once variables in `point.cpp` marked `const`
- **Benchmark exclusion** — `sonar-project.properties` excludes benchmark files from coverage calculation
- **CPD minimum tokens** — set to 100 in `sonar-project.properties`
- **`const` on hot-path intermediates** -- ~60 `FieldElement52` write-once variables in `point.cpp` marked `const`
- **Benchmark exclusion** -- `sonar-project.properties` excludes benchmark files from coverage calculation
- **CPD minimum tokens** -- set to 100 in `sonar-project.properties`
### Added
- **GOVERNANCE.md** — BDFL governance model with continuity plan (bus factor)
- **ROADMAP.md** — 12-month project roadmap (Mar 2026 – Feb 2027)
- **CONTRIBUTING.md** — Developer Certificate of Origin (DCO) requirement
- **OpenSSF Best Practices badge** — added to README
- **Code scanning fixes** — resolved alerts #281, #282
- **GOVERNANCE.md** -- BDFL governance model with continuity plan (bus factor)
- **ROADMAP.md** -- 12-month project roadmap (Mar 2026 - Feb 2027)
- **CONTRIBUTING.md** -- Developer Certificate of Origin (DCO) requirement
- **OpenSSF Best Practices badge** -- added to README
- **Code scanning fixes** -- resolved alerts #281, #282
---
## [3.12.1] - 2026-02-23
### Security
- **bump wheel 0.45.1 → 0.46.2** — fixes CVE-2026-24049 (path traversal in `wheel unpack`)
- **bump setuptools 75.8.0 → 78.1.1** — fixes CVE-2025-47273 (path traversal via vendored wheel)
- **bump wheel 0.45.1 -> 0.46.2** -- fixes CVE-2026-24049 (path traversal in `wheel unpack`)
- **bump setuptools 75.8.0 -> 78.1.1** -- fixes CVE-2025-47273 (path traversal via vendored wheel)
### Changed
- **VERSION.txt** updated to 3.12.1
@ -113,62 +113,62 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
## [3.12.0] - 2026-02-23
### Security — CI/CD Hardening & Supply-Chain Protection
- **SHA-pinned all GitHub Actions** — every action uses immutable commit SHA instead of mutable tags
- **Harden Runner** — `step-security/harden-runner` v2.14.2 on every CI job (egress audit)
- **CodeQL** — upgraded to v4.32.4, job-level `security-events: write`, custom query filters
- **OpenSSF Scorecard** — daily scorecard workflow with SARIF upload
- **SonarCloud** — CI-based code quality analysis with build-wrapper
- **pip hash pinning** — `--require-hashes` on all pip install steps in release/CI workflows
- **Dependabot** — configured for GitHub Actions, pip, npm, NuGet, Cargo ecosystems
- **Branch protection** — required reviews, dismiss stale, strict status checks on `main`
### Security -- CI/CD Hardening & Supply-Chain Protection
- **SHA-pinned all GitHub Actions** -- every action uses immutable commit SHA instead of mutable tags
- **Harden Runner** -- `step-security/harden-runner` v2.14.2 on every CI job (egress audit)
- **CodeQL** -- upgraded to v4.32.4, job-level `security-events: write`, custom query filters
- **OpenSSF Scorecard** -- daily scorecard workflow with SARIF upload
- **SonarCloud** -- CI-based code quality analysis with build-wrapper
- **pip hash pinning** -- `--require-hashes` on all pip install steps in release/CI workflows
- **Dependabot** -- configured for GitHub Actions, pip, npm, NuGet, Cargo ecosystems
- **Branch protection** -- required reviews, dismiss stale, strict status checks on `main`
### Fixed
- **66+ code scanning alerts resolved** — unused variables, permissions, hardcoded credentials, scorecard findings
- **StepSecurity remediation** — merged PR #25 with fixes for GHA best practices
- **66+ code scanning alerts resolved** -- unused variables, permissions, hardcoded credentials, scorecard findings
- **StepSecurity remediation** -- merged PR #25 with fixes for GHA best practices
### Changed
- **Dependabot PRs #26–#32 merged** — codeql-action v4.32.4, setup-dotnet v5.1.0, upload-artifact v6.0.0, download-artifact v7.0.0, scorecard-action v2.4.3, attest-build-provenance v3.2.0, sonarqube-scan-action v7.0.0
- **Rust workspace Cargo.toml** — added for Dependabot Cargo ecosystem support
- **Dependabot PRs #26-#32 merged** -- codeql-action v4.32.4, setup-dotnet v5.1.0, upload-artifact v6.0.0, download-artifact v7.0.0, scorecard-action v2.4.3, attest-build-provenance v3.2.0, sonarqube-scan-action v7.0.0
- **Rust workspace Cargo.toml** -- added for Dependabot Cargo ecosystem support
### Added
- **`docs/CODING_STANDARDS.md`** — comprehensive coding standards for OpenSSF CII badge
- **`CONTRIBUTING.md` requirements section** — explicit contribution requirements with links
- **Full AGPL-3.0 LICENSE text** — replaced summary with standard text for GitHub license detection
- **`docs/CODING_STANDARDS.md`** -- comprehensive coding standards for OpenSSF CII badge
- **`CONTRIBUTING.md` requirements section** -- explicit contribution requirements with links
- **Full AGPL-3.0 LICENSE text** -- replaced summary with standard text for GitHub license detection
---
## [3.11.0] - 2026-02-23
### Performance — Effective-Affine & RISC-V Optimization
- **Effective-affine GLV table** — batch-normalize P-multiples to affine in `scalar_mul_glv52`, eliminating Z-coordinate arithmetic from the main loop. Point Add 821→159 ns on x86-64.
- **RISC-V auto-detect CPU** — CMake reads `/proc/cpuinfo` uarch field to set `-mcpu=sifive-u74` automatically. **28–34% speedup** on Milk-V Mars (Scalar Mul 235→154 μs).
- **RISC-V ThinLTO propagation** — ARCH_FLAGS propagated via INTERFACE compile+link options so ThinLTO codegen uses correct CPU scheduling at link time.
- **RISC-V Zba/Zbb fix** — explicit `-march=rv64gc_zba_zbb` alongside `-mcpu` since Clang's sifive-u74 model omits these extensions.
- **ARM64 10×26 field representation** — verified as optimal for Cortex-A76 (74 ns mul vs 100 ns with 5×52).
### Performance -- Effective-Affine & RISC-V Optimization
- **Effective-affine GLV table** -- batch-normalize P-multiples to affine in `scalar_mul_glv52`, eliminating Z-coordinate arithmetic from the main loop. Point Add 821->159 ns on x86-64.
- **RISC-V auto-detect CPU** -- CMake reads `/proc/cpuinfo` uarch field to set `-mcpu=sifive-u74` automatically. **28-34% speedup** on Milk-V Mars (Scalar Mul 235->154 us).
- **RISC-V ThinLTO propagation** -- ARCH_FLAGS propagated via INTERFACE compile+link options so ThinLTO codegen uses correct CPU scheduling at link time.
- **RISC-V Zba/Zbb fix** -- explicit `-march=rv64gc_zba_zbb` alongside `-mcpu` since Clang's sifive-u74 model omits these extensions.
- **ARM64 10x26 field representation** -- verified as optimal for Cortex-A76 (74 ns mul vs 100 ns with 5x52).
### Performance — Embedded
- **SafeGCD30 field inverse** — GCD-based modular inverse for non-`__int128` platforms: ESP32 **118 μs** (was 3 ms).
- **SafeGCD30 scalar inverse** — same technique for scalar field; optimized SHA-256/HMAC/RFC-6979 for embedded.
- **ESP32 4-stream GLV Strauss** — parallel endomorphism streams + Z²-verify optimization.
- **CT layer optimizations** — comprehensive CT optimization pass for embedded targets.
### Performance -- Embedded
- **SafeGCD30 field inverse** -- GCD-based modular inverse for non-`__int128` platforms: ESP32 **118 us** (was 3 ms).
- **SafeGCD30 scalar inverse** -- same technique for scalar field; optimized SHA-256/HMAC/RFC-6979 for embedded.
- **ESP32 4-stream GLV Strauss** -- parallel endomorphism streams + Z^2-verify optimization.
- **CT layer optimizations** -- comprehensive CT optimization pass for embedded targets.
### Changed
- **Unified benchmark harness** — all 4 bench binaries share common framework with IQR outlier removal and RDTSCP/chrono auto-selection.
- **CMake 4.x compatibility** — standalone build support with `cmake_minimum_required(3.18)` + project-level CTest.
- **Disable RISC-V FE52 asm** — C++ `__int128` inline is 26–33% faster than hand-written FE52 assembly on RISC-V.
- **Benchmark data refresh** — all platforms re-measured: x86-64 (Clang 21), ARM64 (RK3588), RISC-V (Milk-V Mars).
- **Remove competitor comparison tables** — benchmarks show only UltrafastSecp256k1 results.
- **Unified benchmark harness** -- all 4 bench binaries share common framework with IQR outlier removal and RDTSCP/chrono auto-selection.
- **CMake 4.x compatibility** -- standalone build support with `cmake_minimum_required(3.18)` + project-level CTest.
- **Disable RISC-V FE52 asm** -- C++ `__int128` inline is 26-33% faster than hand-written FE52 assembly on RISC-V.
- **Benchmark data refresh** -- all platforms re-measured: x86-64 (Clang 21), ARM64 (RK3588), RISC-V (Milk-V Mars).
- **Remove competitor comparison tables** -- benchmarks show only UltrafastSecp256k1 results.
### Added
- **Lightning donation** — `shrec@stacker.news` badge in README.
- **ARM64 5×52 MUL/UMULH kernel** — interleaved multiply for exploration (10×26 remains default).
- **ESP32 comprehensive benchmark** — full benchmark matching x86 format.
- **Lightning donation** -- `shrec@stacker.news` badge in README.
- **ARM64 5x52 MUL/UMULH kernel** -- interleaved multiply for exploration (10x26 remains default).
- **ESP32 comprehensive benchmark** -- full benchmark matching x86 format.
### Fixed
- **CI Unicode cleanup** — replaced all Unicode characters with ASCII across codebase.
- **CI benchmark parse fix** — reset baseline for Unicode-free benchmark output.
- **Orphaned submodule** — removed stale `cpu/secp256k1` submodule entry.
- **CI Unicode cleanup** -- replaced all Unicode characters with ASCII across codebase.
- **CI benchmark parse fix** -- reset baseline for Unicode-free benchmark output.
- **Orphaned submodule** -- removed stale `cpu/secp256k1` submodule entry.
### Acknowledgments
- Stacker News, Delving Bitcoin, and @0xbitcoiner for community support.
@ -177,109 +177,109 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
## [3.10.0] - 2026-02-21
### Performance — CT Hot-Path Optimization (Phases 5–15)
- **5×52 field representation** — switched point internals from 4×64 to `FieldElement52`, enabling `__int128` lazy reduction across all CT operations
- **Direct asm bypass** — CT `field_mul`/`field_sqr` now call hand-tuned 5×52 multiply/square directly: **70 ns → 33 ns**
- **GLV endomorphism** — CT `scalar_mul` via λ-decomposition + interleaved double-and-add: **304 μs → 20 μs**
- **CT generator_mul precomputed table** — 16-entry precomputed-G table with batch inversion: **310 μs → 9.8 μs (31× speedup)**
- **Batch inversion + Brier-Joye unified add** — Montgomery's trick for multi-point normalization
- **Hamburg signed-digit + batch doubling** — compact signed-digit recoding with merged double passes
- **128-bit split + w=15 for G-stream verify** — Shamir-style dual-stream with wider window: **~14% verify speedup**
- **AVX2 CT table lookup** — `_mm256_cmpeq_epi64` + `_mm256_and_si256` constant-time table scan
- **Effective-affine P table** — batch-normalize P-multiples to skip Z-coordinate arithmetic in main loop
- **Schnorr keypair/pubkey caching + FE52 sqrt** — avoid redundant serialization in sign/verify
- **FE52-native inverse + isomorphic table build + GCD `inv_var`** — SafeGCD field inverse stays in 52-bit form
- **Format conversion elimination** — removed `to_fe()`/`from_fe()` round-trips on every CT hot path
- **Redundant normalize elimination** — `ct_field_mul_impl`/`square_impl` produce already-reduced results
- **Schnorr X-check + Y-parity combined** — single Z-inverse for both x-coordinate check and y-parity in FE52
### Performance -- CT Hot-Path Optimization (Phases 5-15)
- **5x52 field representation** -- switched point internals from 4x64 to `FieldElement52`, enabling `__int128` lazy reduction across all CT operations
- **Direct asm bypass** -- CT `field_mul`/`field_sqr` now call hand-tuned 5x52 multiply/square directly: **70 ns -> 33 ns**
- **GLV endomorphism** -- CT `scalar_mul` via lambda-decomposition + interleaved double-and-add: **304 us -> 20 us**
- **CT generator_mul precomputed table** -- 16-entry precomputed-G table with batch inversion: **310 us -> 9.8 us (31x speedup)**
- **Batch inversion + Brier-Joye unified add** -- Montgomery's trick for multi-point normalization
- **Hamburg signed-digit + batch doubling** -- compact signed-digit recoding with merged double passes
- **128-bit split + w=15 for G-stream verify** -- Shamir-style dual-stream with wider window: **~14% verify speedup**
- **AVX2 CT table lookup** -- `_mm256_cmpeq_epi64` + `_mm256_and_si256` constant-time table scan
- **Effective-affine P table** -- batch-normalize P-multiples to skip Z-coordinate arithmetic in main loop
- **Schnorr keypair/pubkey caching + FE52 sqrt** -- avoid redundant serialization in sign/verify
- **FE52-native inverse + isomorphic table build + GCD `inv_var`** -- SafeGCD field inverse stays in 52-bit form
- **Format conversion elimination** -- removed `to_fe()`/`from_fe()` round-trips on every CT hot path
- **Redundant normalize elimination** -- `ct_field_mul_impl`/`square_impl` produce already-reduced results
- **Schnorr X-check + Y-parity combined** -- single Z-inverse for both x-coordinate check and y-parity in FE52
### Performance — I-Cache Optimization
- **`noinline` on `jac52_add_mixed_inplace`** — prevents inlining of 800+ byte function body into tight loops: **59% I-cache miss reduction**
### Performance -- I-Cache Optimization
- **`noinline` on `jac52_add_mixed_inplace`** -- prevents inlining of 800+ byte function body into tight loops: **59% I-cache miss reduction**
### Fixed
- **`scalar_mul_glv52` infinity guard** — early return on `base.is_infinity() || scalar.is_zero()` prevents zero-inverse crash in Montgomery batch trick (CI #128–131 regression)
- **CT `complete_add` fallback** — uses affine `x()`/`y()` instead of raw Jacobian `X()`/`Y()`
- **MSVC fallback** — `field_neg` arity, `is_equal_mask`, GLV decompose, `y_bytes` redefinition
- **Cross-platform FE52 guard** — `SECP256K1_FAST_52BIT` gating prevents compilation on 32-bit targets
- **`scalar_mul_glv52` infinity guard** -- early return on `base.is_infinity() || scalar.is_zero()` prevents zero-inverse crash in Montgomery batch trick (CI #128-131 regression)
- **CT `complete_add` fallback** -- uses affine `x()`/`y()` instead of raw Jacobian `X()`/`Y()`
- **MSVC fallback** -- `field_neg` arity, `is_equal_mask`, GLV decompose, `y_bytes` redefinition
- **Cross-platform FE52 guard** -- `SECP256K1_FAST_52BIT` gating prevents compilation on 32-bit targets
### Changed
- **Dead code removal** — removed functions superseded by Z-ratio normalization path
- **Barrett → specialized GLV multiplies** — replaced generic Barrett reduction with curve-specific multiply
- **Dead code removal** -- removed functions superseded by Z-ratio normalization path
- **Barrett -> specialized GLV multiplies** -- replaced generic Barrett reduction with curve-specific multiply
### CI / Infrastructure
- **npm/nuget publishing fix** — corrected CI workflow for package publishing
- **Comprehensive audit suite** — 8 suites, 641K checks, cryptographic correctness validation
- **CT operations benchmark** — `bench_ct_vs_libsecp` with per-operation ns/op and throughput
- **dudect timing test** — side-channel timing leakage detection for CT operations
- **Doxyfile version auto-injection** — `VERSION.txt` → `Doxyfile` at configure time
- **npm/nuget publishing fix** -- corrected CI workflow for package publishing
- **Comprehensive audit suite** -- 8 suites, 641K checks, cryptographic correctness validation
- **CT operations benchmark** -- `bench_ct_vs_libsecp` with per-operation ns/op and throughput
- **dudect timing test** -- side-channel timing leakage detection for CT operations
- **Doxyfile version auto-injection** -- `VERSION.txt` -> `Doxyfile` at configure time
---
## [3.6.0] - 2026-02-20
### Added — GPU Signature Operations (CUDA)
- **ECDSA Sign on GPU** — `ecdsa_sign_batch_kernel` with RFC 6979 deterministic nonces, low-S normalization. **204.8 ns / 4.88 M/s** per signature.
- **ECDSA Verify on GPU** — `ecdsa_verify_batch_kernel` with Shamir's trick + GLV endomorphism. **410.1 ns / 2.44 M/s** per verification.
- **ECDSA Sign Recoverable on GPU** — `ecdsa_sign_recoverable_batch_kernel` with recovery ID computation. **311.5 ns / 3.21 M/s**.
- **ECDSA Recover on GPU** — `ecdsa_recover_batch_kernel` for public key recovery from signature + recid.
- **Schnorr Sign (BIP-340) on GPU** — `schnorr_sign_batch_kernel` with tagged hash midstates. **273.4 ns / 3.66 M/s**.
- **Schnorr Verify (BIP-340) on GPU** — `schnorr_verify_batch_kernel` with x-only pubkey verification. **354.6 ns / 2.82 M/s**.
- **6 new batch kernel wrappers** in `secp256k1.cu` — all with `__launch_bounds__(128, 2)` matching scalar_mul kernels.
- **5 GPU signature benchmarks** in `bench_cuda.cu` — ECDSA sign, verify, sign+recid, Schnorr sign, Schnorr verify.
- **`prepare_ecdsa_test_data()`** helper — generates valid signatures on GPU for verify benchmark correctness.
### Added -- GPU Signature Operations (CUDA)
- **ECDSA Sign on GPU** -- `ecdsa_sign_batch_kernel` with RFC 6979 deterministic nonces, low-S normalization. **204.8 ns / 4.88 M/s** per signature.
- **ECDSA Verify on GPU** -- `ecdsa_verify_batch_kernel` with Shamir's trick + GLV endomorphism. **410.1 ns / 2.44 M/s** per verification.
- **ECDSA Sign Recoverable on GPU** -- `ecdsa_sign_recoverable_batch_kernel` with recovery ID computation. **311.5 ns / 3.21 M/s**.
- **ECDSA Recover on GPU** -- `ecdsa_recover_batch_kernel` for public key recovery from signature + recid.
- **Schnorr Sign (BIP-340) on GPU** -- `schnorr_sign_batch_kernel` with tagged hash midstates. **273.4 ns / 3.66 M/s**.
- **Schnorr Verify (BIP-340) on GPU** -- `schnorr_verify_batch_kernel` with x-only pubkey verification. **354.6 ns / 2.82 M/s**.
- **6 new batch kernel wrappers** in `secp256k1.cu` -- all with `__launch_bounds__(128, 2)` matching scalar_mul kernels.
- **5 GPU signature benchmarks** in `bench_cuda.cu` -- ECDSA sign, verify, sign+recid, Schnorr sign, Schnorr verify.
- **`prepare_ecdsa_test_data()`** helper -- generates valid signatures on GPU for verify benchmark correctness.
> **No other open-source GPU library provides secp256k1 ECDSA + Schnorr sign/verify.** This is the only production-ready multi-backend (CUDA + OpenCL + Metal) GPU secp256k1 library.
### Changed
- **CUDA benchmark numbers updated** — Scalar Mul improved to 225.8 ns (was 266.5 ns), Field Inv to 10.2 ns (was 12.1 ns) from `__launch_bounds__` thread count fix (128 vs 256 mismatch).
- **README** — Added blockchain coin badges (Bitcoin, Ethereum, +25), GPU signature benchmark tables, 27-coin supported coins section, SEO metadata footer, updated performance headline.
- **BENCHMARKS.md** — Split CUDA section into Core ECC + GPU Signature Operations; updated all comparison tables.
- **CUDA benchmark numbers updated** -- Scalar Mul improved to 225.8 ns (was 266.5 ns), Field Inv to 10.2 ns (was 12.1 ns) from `__launch_bounds__` thread count fix (128 vs 256 mismatch).
- **README** -- Added blockchain coin badges (Bitcoin, Ethereum, +25), GPU signature benchmark tables, 27-coin supported coins section, SEO metadata footer, updated performance headline.
- **BENCHMARKS.md** -- Split CUDA section into Core ECC + GPU Signature Operations; updated all comparison tables.
### Fixed
- **CUDA benchmark thread mismatch** — Benchmarks used 256 threads/block but kernels declared `__launch_bounds__(128, 2)`, causing 0.0 ns results. Fixed to use 128 threads.
- **CUDA benchmark thread mismatch** -- Benchmarks used 256 threads/block but kernels declared `__launch_bounds__(128, 2)`, causing 0.0 ns results. Fixed to use 128 threads.
---
## [3.4.0] - 2026-02-19
### Added — Stable C ABI (`ufsecp`)
- **Complete C ABI library** — `ufsecp.dll` / `libufsecp.so` / `libufsecp.dylib` with 45 exported symbols, opaque `ufsecp_ctx` handle, and structured error model (11 error codes)
### Added -- Stable C ABI (`ufsecp`)
- **Complete C ABI library** -- `ufsecp.dll` / `libufsecp.so` / `libufsecp.dylib` with 45 exported symbols, opaque `ufsecp_ctx` handle, and structured error model (11 error codes)
- **Headers**: `ufsecp.h` (main API, 37 functions), `ufsecp_version.h` (ABI versioning), `ufsecp_error.h` (error codes)
- **Implementation**: `ufsecp_impl.cpp` wrapping C++ core into C-linkage with zero heap allocations on hot paths
- **Build system**: `include/ufsecp/CMakeLists.txt` — shared + static build, standalone or sub-project mode, pkg-config template (`ufsecp.pc.in`)
- **Build system**: `include/ufsecp/CMakeLists.txt` -- shared + static build, standalone or sub-project mode, pkg-config template (`ufsecp.pc.in`)
- **API coverage**: key generation, ECDSA sign/verify/recover, Schnorr BIP-340 sign/verify, SHA-256, ECDH (compressed/xonly/raw), BIP-32 HD derivation, Bitcoin addresses (P2PKH/P2WPKH/P2TR), WIF encode/decode, DER serialization, public key tweak (add/mul), selftest
- **`SUPPORTED_GUARANTEES.md`** — Tier 1/2/3 stability guarantees documentation
- **`examples/hello_world.c`** — Minimal usage example
- **`SUPPORTED_GUARANTEES.md`** -- Tier 1/2/3 stability guarantees documentation
- **`examples/hello_world.c`** -- Minimal usage example
### Added — Dual-Layer Constant-Time Architecture
- **Always-on dual layers** — `secp256k1::fast::*` (public operations) and `secp256k1::ct::*` (secret-key operations) are always active simultaneously; no flag-based selection
- **CT layer** — Complete addition formula (12M+2S), fixed-trace scalar multiplication, constant-time table lookup
- **Valgrind/MSAN markers** — `SECP256K1_CLASSIFY()` / `SECP256K1_DECLASSIFY()` for verifiable constant-time guarantees
### Added -- Dual-Layer Constant-Time Architecture
- **Always-on dual layers** -- `secp256k1::fast::*` (public operations) and `secp256k1::ct::*` (secret-key operations) are always active simultaneously; no flag-based selection
- **CT layer** -- Complete addition formula (12M+2S), fixed-trace scalar multiplication, constant-time table lookup
- **Valgrind/MSAN markers** -- `SECP256K1_CLASSIFY()` / `SECP256K1_DECLASSIFY()` for verifiable constant-time guarantees
### Added — SHA-256 Hardware Acceleration
- **SHA-NI hardware dispatch** — Runtime CPUID detection for Intel SHA Extensions; transparent fallback to software implementation
- **Zero-overhead dispatch** — Function pointer set once at init, no branching in hot path
### Added -- SHA-256 Hardware Acceleration
- **SHA-NI hardware dispatch** -- Runtime CPUID detection for Intel SHA Extensions; transparent fallback to software implementation
- **Zero-overhead dispatch** -- Function pointer set once at init, no branching in hot path
### Added — C# P/Invoke Bindings & Benchmarks
- **`bindings/csharp/UfsepcBenchmark/`** — .NET 8.0 project with complete P/Invoke declarations for all 45 `ufsecp` functions
- **68 correctness tests** — 12 categories covering key ops, ECDSA, Schnorr, SHA-256, ECDH, BIP-32, addresses, DER round-trip, recovery, WIF, tweaks, selftest
- **19 benchmarks** — SHA-256: 137ns, ECDSA Sign: 11.89μs, Verify: 47.95μs, Schnorr Sign: 10.68μs, KeyGen: 1.22μs
- **P/Invoke overhead measured** — ~10–40ns per call (negligible)
### Added -- C# P/Invoke Bindings & Benchmarks
- **`bindings/csharp/UfsepcBenchmark/`** -- .NET 8.0 project with complete P/Invoke declarations for all 45 `ufsecp` functions
- **68 correctness tests** -- 12 categories covering key ops, ECDSA, Schnorr, SHA-256, ECDH, BIP-32, addresses, DER round-trip, recovery, WIF, tweaks, selftest
- **19 benchmarks** -- SHA-256: 137ns, ECDSA Sign: 11.89us, Verify: 47.95us, Schnorr Sign: 10.68us, KeyGen: 1.22us
- **P/Invoke overhead measured** -- ~10-40ns per call (negligible)
### Changed
- `ufsecp_ctx_create()` takes no flags parameter — dual-layer CT architecture is always active
- `ufsecp_ctx_create()` takes no flags parameter -- dual-layer CT architecture is always active
---
## [3.3.0] - 2026-02-16
### Added — Comprehensive Benchmarks
- **Metal GPU benchmark** (`bench_metal.mm`): 9 operations — Field Mul/Add/Sub/Sqr/Inv, Point Add/Double, Scalar Mul (P×k), Generator Mul (G×k). Matches CUDA benchmark format with warmup, kernel-only timing, and throughput tables.
### Added -- Comprehensive Benchmarks
- **Metal GPU benchmark** (`bench_metal.mm`): 9 operations -- Field Mul/Add/Sub/Sqr/Inv, Point Add/Double, Scalar Mul (Pxk), Generator Mul (Gxk). Matches CUDA benchmark format with warmup, kernel-only timing, and throughput tables.
- **3 new Metal GPU kernels**: `field_add_bench`, `field_sub_bench`, `field_inv_bench` in `secp256k1_kernels.metal`
- **WASM benchmark** (`bench_wasm.mjs`): Node.js benchmark for all WASM-exported operations — Pubkey Create (G×k), Point Mul, Point Add, ECDSA Sign/Verify, Schnorr Sign/Verify, SHA-256 (32B/1KB)
- **WASM benchmark** (`bench_wasm.mjs`): Node.js benchmark for all WASM-exported operations -- Pubkey Create (Gxk), Point Mul, Point Add, ECDSA Sign/Verify, Schnorr Sign/Verify, SHA-256 (32B/1KB)
- WASM benchmark runs automatically in CI (Node.js 20 setup + execution)
### Added — Security & Maturity
### Added -- Security & Maturity
- SECURITY.md v3.2 with vulnerability reporting guidelines
- THREAT_MODEL.md with detailed threat analysis
- API stability guarantees documented
@ -288,18 +288,18 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
- Repro bundle support for deterministic test reproduction
- Sanitizer CI integration (ASan/UBSan/TSan)
### Added — Testing
### Added -- Testing
- Boundary KAT vectors for field limb boundaries
- Batch inverse sweep tests
- Unified test runner (12 test files consolidated into single runner)
### Added — Documentation
### Added -- Documentation
- Batch inverse & mixed addition API reference with examples (full point, X-only, CUDA, division, scratch reuse, Montgomery trick)
- CHANGELOG.md (this file), CODE_OF_CONDUCT.md
- Benchmark dashboard link in README
### Changed
- Benchmark alert threshold 120% → 150% (reduces false positive alerts on shared CI runners)
- Benchmark alert threshold 120% -> 150% (reduces false positive alerts on shared CI runners)
- README: added Apple Silicon/Metal badges, CI status badge, version badge, benchmark dashboard link
- Feature coverage table updated to v3.3.0
- Badge layout reorganized: CI/Bench/Release first, then GPU backends, then platforms
@ -322,115 +322,115 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
## [3.2.0] - 2026-02-16
### Added — Coins Layer
- **Multi-coin infrastructure** — `coins/coin_params.hpp` with constexpr `CoinParams` definitions for 27 secp256k1-based cryptocurrencies: Bitcoin, Litecoin, Dogecoin, Dash, Ethereum, Bitcoin Cash, Bitcoin SV, Zcash, DigiByte, Namecoin, Peercoin, Vertcoin, Viacoin, Groestlcoin, Syscoin, BNB Smart Chain, Polygon, Avalanche, Fantom, Arbitrum, Optimism, Ravencoin, Flux, Qtum, Horizen, Bitcoin Gold, Komodo
- **Unified address generation** — `coin_address()`, `coin_address_p2pkh()`, `coin_address_p2wpkh()`, `coin_address_p2tr()` with automatic encoding dispatch per coin (Base58Check / Bech32 / EIP-55)
- **Per-coin WIF encoding** — `coin_wif_encode()` with coin-specific prefix bytes
- **Full key derivation pipeline** — `coin_derive()` takes private key + CoinParams → public key + address + WIF in one call
- **Coin registry** — `find_by_ticker("BTC")`, `find_by_coin_type(60)`, `ALL_COINS[]` array for iteration
### Added -- Coins Layer
- **Multi-coin infrastructure** -- `coins/coin_params.hpp` with constexpr `CoinParams` definitions for 27 secp256k1-based cryptocurrencies: Bitcoin, Litecoin, Dogecoin, Dash, Ethereum, Bitcoin Cash, Bitcoin SV, Zcash, DigiByte, Namecoin, Peercoin, Vertcoin, Viacoin, Groestlcoin, Syscoin, BNB Smart Chain, Polygon, Avalanche, Fantom, Arbitrum, Optimism, Ravencoin, Flux, Qtum, Horizen, Bitcoin Gold, Komodo
- **Unified address generation** -- `coin_address()`, `coin_address_p2pkh()`, `coin_address_p2wpkh()`, `coin_address_p2tr()` with automatic encoding dispatch per coin (Base58Check / Bech32 / EIP-55)
- **Per-coin WIF encoding** -- `coin_wif_encode()` with coin-specific prefix bytes
- **Full key derivation pipeline** -- `coin_derive()` takes private key + CoinParams -> public key + address + WIF in one call
- **Coin registry** -- `find_by_ticker("BTC")`, `find_by_coin_type(60)`, `ALL_COINS[]` array for iteration
### Added — Ethereum & EVM Support
- **Keccak-256 hash** — Standard Keccak-256 (NOT SHA3-256; Ethereum-compatible 0x01 padding), incremental API (`Keccak256State::update/finalize`), one-shot `keccak256()` (`coins/keccak256.hpp`, `src/keccak256.cpp`)
- **Ethereum addresses (EIP-55)** — `ethereum_address()` with mixed-case checksummed output, `ethereum_address_raw()`, `ethereum_address_bytes()`, `eip55_checksum()`, `eip55_verify()` (`coins/ethereum.hpp`, `src/ethereum.cpp`)
- **EVM chain compatibility** — Same address derivation works for BSC, Polygon, Avalanche, Fantom, Arbitrum, Optimism
### Added -- Ethereum & EVM Support
- **Keccak-256 hash** -- Standard Keccak-256 (NOT SHA3-256; Ethereum-compatible 0x01 padding), incremental API (`Keccak256State::update/finalize`), one-shot `keccak256()` (`coins/keccak256.hpp`, `src/keccak256.cpp`)
- **Ethereum addresses (EIP-55)** -- `ethereum_address()` with mixed-case checksummed output, `ethereum_address_raw()`, `ethereum_address_bytes()`, `eip55_checksum()`, `eip55_verify()` (`coins/ethereum.hpp`, `src/ethereum.cpp`)
- **EVM chain compatibility** -- Same address derivation works for BSC, Polygon, Avalanche, Fantom, Arbitrum, Optimism
### Added — BIP-44 HD Derivation
- **Coin-type derivation** — `coin_derive_key()` with automatic purpose selection: BIP-86 (Taproot) for Bitcoin, BIP-84 (SegWit) for Litecoin, BIP-44 (legacy) for Dogecoin/Ethereum
- **Path construction** — `coin_derive_path()` builds `m/purpose'/coin_type'/account'/change/index`
- **Seed-to-address pipeline** — `coin_address_from_seed()` full pipeline: seed → BIP-32 master → BIP-44 derivation → coin address
### Added -- BIP-44 HD Derivation
- **Coin-type derivation** -- `coin_derive_key()` with automatic purpose selection: BIP-86 (Taproot) for Bitcoin, BIP-84 (SegWit) for Litecoin, BIP-44 (legacy) for Dogecoin/Ethereum
- **Path construction** -- `coin_derive_path()` builds `m/purpose'/coin_type'/account'/change/index`
- **Seed-to-address pipeline** -- `coin_address_from_seed()` full pipeline: seed -> BIP-32 master -> BIP-44 derivation -> coin address
### Added — Custom Generator Point & Curve Context
- **CurveContext** — `context.hpp` with custom generator point support, curve order (raw bytes), cofactor, and name (`CurveContext::secp256k1_default()`, `CurveContext::with_generator()`, `CurveContext::custom()`)
- **Context-aware operations** — `derive_public_key(privkey, &ctx)`, `scalar_mul_G(scalar, &ctx)`, `effective_generator(&ctx)` — nullptr = standard secp256k1, custom context = custom G
- **Zero-overhead default** — Standard secp256k1 usage with nullptr context has no extra cost
### Added -- Custom Generator Point & Curve Context
- **CurveContext** -- `context.hpp` with custom generator point support, curve order (raw bytes), cofactor, and name (`CurveContext::secp256k1_default()`, `CurveContext::with_generator()`, `CurveContext::custom()`)
- **Context-aware operations** -- `derive_public_key(privkey, &ctx)`, `scalar_mul_G(scalar, &ctx)`, `effective_generator(&ctx)` -- nullptr = standard secp256k1, custom context = custom G
- **Zero-overhead default** -- Standard secp256k1 usage with nullptr context has no extra cost
### Added — Tests
- **test_coins** — 32 tests covering CurveContext, CoinParams registry, Keccak-256 vectors, EIP-55 checksum, Bitcoin/Litecoin/Dogecoin/Dash/Ethereum addresses, WIF encoding, BIP-44 path/derivation, custom generator derivation, full multi-coin pipeline
### Added -- Tests
- **test_coins** -- 32 tests covering CurveContext, CoinParams registry, Keccak-256 vectors, EIP-55 checksum, Bitcoin/Litecoin/Dogecoin/Dash/Ethereum addresses, WIF encoding, BIP-44 path/derivation, custom generator derivation, full multi-coin pipeline
---
## [3.1.0] - 2026-02-15
### Added — Cryptographic Protocols
- **Pedersen Commitments** — `pedersen_commit(value, blinding)`, `pedersen_verify()`, `pedersen_verify_sum()` (homomorphic balance proofs), `pedersen_blind_sum()`, `pedersen_switch_commit()` (Mimblewimble switch commitments); nothing-up-my-sleeve generators H and J via SHA-256 try-and-increment (`cpu/include/pedersen.hpp`, `cpu/src/pedersen.cpp`)
- **FROST Threshold Signatures** — `frost_keygen_begin()` / `frost_keygen_finalize()` (Feldman VSS distributed key generation), `frost_sign_nonce_gen()` / `frost_sign()` (partial signature rounds), `frost_verify_partial()`, `frost_aggregate()` → standard BIP-340 SchnorrSignature; `frost_lagrange_coefficient()` helper (`cpu/include/frost.hpp`, `cpu/src/frost.cpp`)
- **Adaptor Signatures** — Schnorr adaptor: `schnorr_adaptor_sign()`, `schnorr_adaptor_verify()`, `schnorr_adaptor_adapt()`, `schnorr_adaptor_extract()`; ECDSA adaptor: `ecdsa_adaptor_sign()`, `ecdsa_adaptor_verify()`, `ecdsa_adaptor_adapt()`, `ecdsa_adaptor_extract()` — for atomic swaps and DLCs (`cpu/include/adaptor.hpp`, `cpu/src/adaptor.cpp`)
- **MuSig2 multi-signatures (BIP-327)** — Key aggregation (KeyAgg), deterministic nonce generation, 2-round signing protocol, partial sig verify, Schnorr-compatible aggregate signatures (`cpu/include/musig2.hpp`, `cpu/src/musig2.cpp`)
- **ECDH key exchange** — `ecdh_compute` (SHA-256 of compressed point), `ecdh_compute_xonly` (SHA-256 of x-coordinate), `ecdh_compute_raw` (raw x-coordinate) (`cpu/include/ecdh.hpp`, `cpu/src/ecdh.cpp`)
- **ECDSA public key recovery** — `ecdsa_sign_recoverable` (deterministic recid), `ecdsa_recover` (reconstruct pubkey from signature + recid), compact 65-byte serialization (`cpu/include/recovery.hpp`, `cpu/src/recovery.cpp`)
- **Taproot (BIP-341/342)** — Tweak hash, output key computation, private key tweaking, commitment verification, TapLeaf/TapBranch hashing, Merkle root/proof construction (`cpu/include/taproot.hpp`, `cpu/src/taproot.cpp`)
- **BIP-32 HD key derivation** — Master key from seed, hardened/normal child derivation, path parsing (m/0'/1/2h), Base58Check serialization (xprv/xpub), RIPEMD-160 fingerprinting (`cpu/include/bip32.hpp`, `cpu/src/bip32.cpp`)
- **BIP-352 Silent Payments** — `silent_payment_address()`, `SilentPaymentAddress::encode()`, `silent_payment_create_output()`, `silent_payment_scan()` with ECDH-based stealth addressing and multi-output support (`cpu/include/address.hpp`, `cpu/src/address.cpp`)
### Added -- Cryptographic Protocols
- **Pedersen Commitments** -- `pedersen_commit(value, blinding)`, `pedersen_verify()`, `pedersen_verify_sum()` (homomorphic balance proofs), `pedersen_blind_sum()`, `pedersen_switch_commit()` (Mimblewimble switch commitments); nothing-up-my-sleeve generators H and J via SHA-256 try-and-increment (`cpu/include/pedersen.hpp`, `cpu/src/pedersen.cpp`)
- **FROST Threshold Signatures** -- `frost_keygen_begin()` / `frost_keygen_finalize()` (Feldman VSS distributed key generation), `frost_sign_nonce_gen()` / `frost_sign()` (partial signature rounds), `frost_verify_partial()`, `frost_aggregate()` -> standard BIP-340 SchnorrSignature; `frost_lagrange_coefficient()` helper (`cpu/include/frost.hpp`, `cpu/src/frost.cpp`)
- **Adaptor Signatures** -- Schnorr adaptor: `schnorr_adaptor_sign()`, `schnorr_adaptor_verify()`, `schnorr_adaptor_adapt()`, `schnorr_adaptor_extract()`; ECDSA adaptor: `ecdsa_adaptor_sign()`, `ecdsa_adaptor_verify()`, `ecdsa_adaptor_adapt()`, `ecdsa_adaptor_extract()` -- for atomic swaps and DLCs (`cpu/include/adaptor.hpp`, `cpu/src/adaptor.cpp`)
- **MuSig2 multi-signatures (BIP-327)** -- Key aggregation (KeyAgg), deterministic nonce generation, 2-round signing protocol, partial sig verify, Schnorr-compatible aggregate signatures (`cpu/include/musig2.hpp`, `cpu/src/musig2.cpp`)
- **ECDH key exchange** -- `ecdh_compute` (SHA-256 of compressed point), `ecdh_compute_xonly` (SHA-256 of x-coordinate), `ecdh_compute_raw` (raw x-coordinate) (`cpu/include/ecdh.hpp`, `cpu/src/ecdh.cpp`)
- **ECDSA public key recovery** -- `ecdsa_sign_recoverable` (deterministic recid), `ecdsa_recover` (reconstruct pubkey from signature + recid), compact 65-byte serialization (`cpu/include/recovery.hpp`, `cpu/src/recovery.cpp`)
- **Taproot (BIP-341/342)** -- Tweak hash, output key computation, private key tweaking, commitment verification, TapLeaf/TapBranch hashing, Merkle root/proof construction (`cpu/include/taproot.hpp`, `cpu/src/taproot.cpp`)
- **BIP-32 HD key derivation** -- Master key from seed, hardened/normal child derivation, path parsing (m/0'/1/2h), Base58Check serialization (xprv/xpub), RIPEMD-160 fingerprinting (`cpu/include/bip32.hpp`, `cpu/src/bip32.cpp`)
- **BIP-352 Silent Payments** -- `silent_payment_address()`, `SilentPaymentAddress::encode()`, `silent_payment_create_output()`, `silent_payment_scan()` with ECDH-based stealth addressing and multi-output support (`cpu/include/address.hpp`, `cpu/src/address.cpp`)
### Added — Address & Encoding
- **Bitcoin Address Generation** — `hash160()` (RIPEMD-160 + SHA-256), `base58check_encode()` / `base58check_decode()`, `bech32_encode()` / `bech32_decode()` (BIP-173/BIP-350, Bech32/Bech32m), `address_p2pkh()`, `address_p2wpkh()`, `address_p2tr()`, `wif_encode()` / `wif_decode()` (`cpu/include/address.hpp`, `cpu/src/address.cpp`)
### Added -- Address & Encoding
- **Bitcoin Address Generation** -- `hash160()` (RIPEMD-160 + SHA-256), `base58check_encode()` / `base58check_decode()`, `bech32_encode()` / `bech32_decode()` (BIP-173/BIP-350, Bech32/Bech32m), `address_p2pkh()`, `address_p2wpkh()`, `address_p2tr()`, `wif_encode()` / `wif_decode()` (`cpu/include/address.hpp`, `cpu/src/address.cpp`)
### Added — Core Algorithms
- **Multi-scalar multiplication** — Shamir's trick (2-point) + Strauss interleaved wNAF (n-point) (`cpu/include/multiscalar.hpp`, `cpu/src/multiscalar.cpp`)
- **Batch signature verification** — Schnorr and ECDSA batch verify with random linear combination; `identify_invalid()` to pinpoint bad signatures (`cpu/include/batch_verify.hpp`, `cpu/src/batch_verify.cpp`)
- **SHA-512** — Header-only implementation for HMAC-SHA512 / BIP-32 (`cpu/include/sha512.hpp`)
- **Constant-time byte utilities** — `ct_equal`, `ct_is_zero`, `ct_compare`, `ct_memzero` (volatile + asm barrier), `ct_memcpy_if`, `ct_memswap_if`, `ct_select_byte` (`cpu/include/ct_utils.hpp`)
### Added -- Core Algorithms
- **Multi-scalar multiplication** -- Shamir's trick (2-point) + Strauss interleaved wNAF (n-point) (`cpu/include/multiscalar.hpp`, `cpu/src/multiscalar.cpp`)
- **Batch signature verification** -- Schnorr and ECDSA batch verify with random linear combination; `identify_invalid()` to pinpoint bad signatures (`cpu/include/batch_verify.hpp`, `cpu/src/batch_verify.cpp`)
- **SHA-512** -- Header-only implementation for HMAC-SHA512 / BIP-32 (`cpu/include/sha512.hpp`)
- **Constant-time byte utilities** -- `ct_equal`, `ct_is_zero`, `ct_compare`, `ct_memzero` (volatile + asm barrier), `ct_memcpy_if`, `ct_memswap_if`, `ct_select_byte` (`cpu/include/ct_utils.hpp`)
### Added — Performance
- **AVX2/AVX-512 SIMD batch field ops** — Runtime CPUID detection, auto-dispatching `batch_field_add/sub/mul/sqr`, Montgomery batch inverse (1 inversion + 3(n-1) multiplications) (`cpu/include/field_simd.hpp`, `cpu/src/field_simd.cpp`)
### Added -- Performance
- **AVX2/AVX-512 SIMD batch field ops** -- Runtime CPUID detection, auto-dispatching `batch_field_add/sub/mul/sqr`, Montgomery batch inverse (1 inversion + 3(n-1) multiplications) (`cpu/include/field_simd.hpp`, `cpu/src/field_simd.cpp`)
### Added — GPU Optimization
- **Occupancy auto-tune utility** — `gpu_occupancy.cuh` with `optimal_launch_1d()` (uses `cudaOccupancyMaxPotentialBlockSize`), `query_occupancy()`, and startup device diagnostics
- **Warp-level reduction primitives** — `warp_reduce_sum()`, `warp_reduce_sum64()`, `warp_reduce_or()`, `warp_broadcast()`, `warp_aggregated_atomic_add()` in reusable header
- **`__launch_bounds__` on library kernels** — `field_mul/add/sub/inv_kernel` (256,4), `scalar_mul_batch/generator_mul_batch_kernel` (128,2), `point_add/dbl_kernel` (256,4), `hash160_pubkey_kernel` (256,4)
### Added -- GPU Optimization
- **Occupancy auto-tune utility** -- `gpu_occupancy.cuh` with `optimal_launch_1d()` (uses `cudaOccupancyMaxPotentialBlockSize`), `query_occupancy()`, and startup device diagnostics
- **Warp-level reduction primitives** -- `warp_reduce_sum()`, `warp_reduce_sum64()`, `warp_reduce_or()`, `warp_broadcast()`, `warp_aggregated_atomic_add()` in reusable header
- **`__launch_bounds__` on library kernels** -- `field_mul/add/sub/inv_kernel` (256,4), `scalar_mul_batch/generator_mul_batch_kernel` (128,2), `point_add/dbl_kernel` (256,4), `hash160_pubkey_kernel` (256,4)
### Added — Build & Packaging
- **PGO build scripts** — `build_pgo.sh` (Linux, Clang/GCC auto-detect) and `build_pgo.ps1` (Windows, MSVC/ClangCL)
- **MSVC PGO support** — CMakeLists.txt now handles `/GL` + `/GENPROFILE` / `/USEPROFILE` for MSVC in addition to Clang/GCC
- **vcpkg manifest** — `vcpkg.json` with optional features (asm, cuda, lto)
- **Conan 2.x recipe** — `conanfile.py` with CMakeToolchain integration and shared/fPIC/asm/lto options
- **Benchmark dashboard CI** — GitHub Actions workflow (`benchmark.yml`) running benchmarks on Linux + Windows, `parse_benchmark.py` for JSON output, `github-action-benchmark` integration with 120% alert threshold
### Added -- Build & Packaging
- **PGO build scripts** -- `build_pgo.sh` (Linux, Clang/GCC auto-detect) and `build_pgo.ps1` (Windows, MSVC/ClangCL)
- **MSVC PGO support** -- CMakeLists.txt now handles `/GL` + `/GENPROFILE` / `/USEPROFILE` for MSVC in addition to Clang/GCC
- **vcpkg manifest** -- `vcpkg.json` with optional features (asm, cuda, lto)
- **Conan 2.x recipe** -- `conanfile.py` with CMakeToolchain integration and shared/fPIC/asm/lto options
- **Benchmark dashboard CI** -- GitHub Actions workflow (`benchmark.yml`) running benchmarks on Linux + Windows, `parse_benchmark.py` for JSON output, `github-action-benchmark` integration with 120% alert threshold
### Added — Tests (237 new)
- `test_v4_features` — 90 tests: Pedersen (basic/homomorphic/balance/switch/serialization/zero-value), FROST (Lagrange/keygen/2-of-3 signing), Adaptor (Schnorr basic/ECDSA basic/identity), Address (Base58Check/Bech32/Bech32m/hash160/P2PKH/P2WPKH/P2TR/WIF/consistency), Silent Payments (address/flow/multi-output)
- `test_ecdh_recovery_taproot` — 76 tests: ECDH, Recovery, Taproot, CT Utils, Wycheproof vectors
- `test_multiscalar_batch` — 16 tests: Shamir edge cases, multi-scalar sums, Schnorr & ECDSA batch verify
- `test_bip32` — 28 tests: HMAC-SHA512 vectors, BIP-32 TV1 master/child keys, path derivation, serialization
- `test_musig2` — 19 tests: key aggregation, nonce generation, 2-of-2 & 3-of-3 signing
- `test_simd_batch` — 8 tests: SIMD detection, batch add/sub/mul/sqr, batch inverse
### Added -- Tests (237 new)
- `test_v4_features` -- 90 tests: Pedersen (basic/homomorphic/balance/switch/serialization/zero-value), FROST (Lagrange/keygen/2-of-3 signing), Adaptor (Schnorr basic/ECDSA basic/identity), Address (Base58Check/Bech32/Bech32m/hash160/P2PKH/P2WPKH/P2TR/WIF/consistency), Silent Payments (address/flow/multi-output)
- `test_ecdh_recovery_taproot` -- 76 tests: ECDH, Recovery, Taproot, CT Utils, Wycheproof vectors
- `test_multiscalar_batch` -- 16 tests: Shamir edge cases, multi-scalar sums, Schnorr & ECDSA batch verify
- `test_bip32` -- 28 tests: HMAC-SHA512 vectors, BIP-32 TV1 master/child keys, path derivation, serialization
- `test_musig2` -- 19 tests: key aggregation, nonce generation, 2-of-2 & 3-of-3 signing
- `test_simd_batch` -- 8 tests: SIMD detection, batch add/sub/mul/sqr, batch inverse
### Fixed
- **SHA-512 K[23] constant** — Single-bit typo (`0x76f988da831153b6` → `0x76f988da831153b5`) that caused all SHA-512 hashes to be incorrect
- **MuSig2 per-signer Y parity** — `musig2_partial_sign()` now negates the secret key when the signer's public key has odd Y (required for x-only pubkey compatibility)
- **SHA-512 K[23] constant** -- Single-bit typo (`0x76f988da831153b6` -> `0x76f988da831153b5`) that caused all SHA-512 hashes to be incorrect
- **MuSig2 per-signer Y parity** -- `musig2_partial_sign()` now negates the secret key when the signer's public key has odd Y (required for x-only pubkey compatibility)
---
## [3.0.0] - 2026-02-11
### Added — Cryptographic Primitives
- **ECDSA (RFC 6979)** — Deterministic signing & verification (`cpu/include/ecdsa.hpp`)
- **Schnorr BIP-340** — x-only signing & verification (`cpu/include/schnorr.hpp`)
- **SHA-256** — Standalone hash, zero-dependency (`cpu/include/sha256.hpp`)
- **Constant-time benchmarks** — CT layer micro-benchmarks via CTest
### Added -- Cryptographic Primitives
- **ECDSA (RFC 6979)** -- Deterministic signing & verification (`cpu/include/ecdsa.hpp`)
- **Schnorr BIP-340** -- x-only signing & verification (`cpu/include/schnorr.hpp`)
- **SHA-256** -- Standalone hash, zero-dependency (`cpu/include/sha256.hpp`)
- **Constant-time benchmarks** -- CT layer micro-benchmarks via CTest
### Added — Platform Support
- **iOS** — CMake toolchain, XCFramework build script, SPM (`Package.swift`), CocoaPods (`UltrafastSecp256k1.podspec`), C++ umbrella header
- **WebAssembly (Emscripten)** — C API (11 functions), JS wrapper (`secp256k1.mjs`), TypeScript declarations, npm package `@ultrafastsecp256k1/wasm`
- **ROCm / HIP** — CUDA ↔ HIP portability layer (`gpu_compat.h`), all 24 PTX asm blocks guarded with `#if SECP256K1_USE_PTX` + portable `__int128` alternatives, dual CUDA/HIP CMake build
- **Android NDK** — arm64-v8a CI build with NDK r27c
### Added -- Platform Support
- **iOS** -- CMake toolchain, XCFramework build script, SPM (`Package.swift`), CocoaPods (`UltrafastSecp256k1.podspec`), C++ umbrella header
- **WebAssembly (Emscripten)** -- C API (11 functions), JS wrapper (`secp256k1.mjs`), TypeScript declarations, npm package `@ultrafastsecp256k1/wasm`
- **ROCm / HIP** -- CUDA <-> HIP portability layer (`gpu_compat.h`), all 24 PTX asm blocks guarded with `#if SECP256K1_USE_PTX` + portable `__int128` alternatives, dual CUDA/HIP CMake build
- **Android NDK** -- arm64-v8a CI build with NDK r27c
### Added — Infrastructure
- **CI/CD (GitHub Actions)** — Linux (gcc-13/clang-17 × Release/Debug), Windows (MSVC), macOS (AppleClang), iOS (OS + Simulator + XCFramework), WASM (Emscripten), Android (NDK), ROCm (Docker)
- **Doxygen → GitHub Pages** — Auto-generated API docs on push to main
- **Fuzzing harness** — `tests/fuzz_field.cpp` for libFuzzer field arithmetic testing
- **Version header** — `cmake/version.hpp.in` auto-generates `SECP256K1_VERSION_*` macros
- **`.clang-format` + `.editorconfig`** — Consistent code formatting
- **Desktop example app** — `examples/desktop_example.cpp` with CTest integration
- **CMake install** — `install(TARGETS)` + `install(DIRECTORY)` for system-wide deployment
### Added -- Infrastructure
- **CI/CD (GitHub Actions)** -- Linux (gcc-13/clang-17 x Release/Debug), Windows (MSVC), macOS (AppleClang), iOS (OS + Simulator + XCFramework), WASM (Emscripten), Android (NDK), ROCm (Docker)
- **Doxygen -> GitHub Pages** -- Auto-generated API docs on push to main
- **Fuzzing harness** -- `tests/fuzz_field.cpp` for libFuzzer field arithmetic testing
- **Version header** -- `cmake/version.hpp.in` auto-generates `SECP256K1_VERSION_*` macros
- **`.clang-format` + `.editorconfig`** -- Consistent code formatting
- **Desktop example app** -- `examples/desktop_example.cpp` with CTest integration
- **CMake install** -- `install(TARGETS)` + `install(DIRECTORY)` for system-wide deployment
### Changed
- **Search kernels relocated** — `cuda/include/` → `cuda/app/` (cleaner library vs. app separation)
- **README** — 7 CI badges, comprehensive build instructions for all platforms
- **Search kernels relocated** -- `cuda/include/` -> `cuda/app/` (cleaner library vs. app separation)
- **README** -- 7 CI badges, comprehensive build instructions for all platforms
### ⚠️ Testers Wanted
### [!] Testers Wanted
> We need community testers for platforms we cannot fully validate in CI:
> - **iOS** — Real device testing (iPhone/iPad with Xcode)
> - **AMD GPU (ROCm/HIP)** — AMD Radeon RX / Instinct hardware
> - **iOS** -- Real device testing (iPhone/iPad with Xcode)
> - **AMD GPU (ROCm/HIP)** -- AMD Radeon RX / Instinct hardware
>
> If you have access to these platforms, please run the build and report results!
> Open an issue at https://github.com/shrec/Secp256K1fast/issues
@ -445,8 +445,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
`MidFieldElementData`) with `static_assert` layout guarantees across all backends
- **CUDA edge case tests** (10 new): zero scalar, order scalar, point cancellation,
infinity operand, add/dbl consistency, commutativity, associativity, field inv
edges, scalar mul cross-check, distributive — now 40/40 total
- **OpenCL edge case tests** (8 new): matching coverage — now 40/40 total
edges, scalar mul cross-check, distributive -- now 40/40 total
- **OpenCL edge case tests** (8 new): matching coverage -- now 40/40 total
- **Shared test vectors** (`tests/test_vectors.hpp`): canonical K*G vectors,
edge scalars, large scalar pairs, hex utilities
- **CTest integration for CUDA** (`cuda/CMakeLists.txt`)
@ -460,17 +460,17 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
`from_data()` conversion utilities
- **OpenCL point ops optimized**: 3-temp point doubling (was 12-temp),
alias-safe mixed addition
- **CUDA point ops optimized**: Local-variable rewrite eliminates pointer aliasing —
Point Double **2.29× faster** (1.6→0.7 ns), Point Add **1.91× faster** (2.1→1.1 ns),
kG **2.25× faster** (485→216 ns). CUDA now beats OpenCL on all point ops.
- **CUDA point ops optimized**: Local-variable rewrite eliminates pointer aliasing --
Point Double **2.29x faster** (1.6->0.7 ns), Point Add **1.91x faster** (2.1->1.1 ns),
kG **2.25x faster** (485->216 ns). CUDA now beats OpenCL on all point ops.
- **PTX inline assembly** for NVIDIA OpenCL: Field ops now at parity with CUDA
- **Benchmarks updated**: Full CUDA + OpenCL numbers on RTX 5060 Ti
### Performance (RTX 5060 Ti, kernel-only)
- CUDA kG: 216.1 ns (4.63 M/s) — **CUDA 1.37× faster than OpenCL**
- CUDA kG: 216.1 ns (4.63 M/s) -- **CUDA 1.37x faster than OpenCL**
- OpenCL kG: 295.1 ns (3.39 M/s)
- Point Double: CUDA 0.7 ns (1,352 M/s), OpenCL 0.9 ns — **CUDA 1.29×**
- Point Add: CUDA 1.1 ns (916 M/s), OpenCL 1.6 ns — **CUDA 1.45×**
- Point Double: CUDA 0.7 ns (1,352 M/s), OpenCL 0.9 ns -- **CUDA 1.29x**
- Point Add: CUDA 1.1 ns (916 M/s), OpenCL 1.6 ns -- **CUDA 1.45x**
- Field Mul: 0.2 ns on both (4,139 M/s)
## [1.0.0] - 2026-02-11
@ -481,8 +481,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
- Scalar arithmetic
- GLV endomorphism optimization
- Assembly optimizations:
- x86-64 BMI2/ADX (3-5× speedup)
- RISC-V RV64GC (2-3× speedup)
- x86-64 BMI2/ADX (3-5x speedup)
- RISC-V RV64GC (2-3x speedup)
- RISC-V Vector Extension (RVV) support
- CUDA batch operations
- Memory-mapped database support

36
CMakeLists.txt
View File

@ -136,7 +136,7 @@ if(SECP256K1_BUILD_OPENCL)
endif()
endif()
# ROCm/HIP build — reuses cuda/ sources with portable math fallbacks
# ROCm/HIP build -- reuses cuda/ sources with portable math fallbacks
if(SECP256K1_BUILD_ROCM)
# CMake 3.21+ has native HIP language support
cmake_minimum_required(VERSION 3.21)
@ -150,21 +150,21 @@ if(SECP256K1_BUILD_ROCM)
endif()
endif()
# Apple Metal backend — macOS / iOS / visionOS
# Apple Metal backend -- macOS / iOS / visionOS
# Host-side type tests always build; GPU runtime only on Apple
if(SECP256K1_BUILD_METAL)
if(APPLE)
find_library(_METAL_FW Metal)
find_library(_FOUNDATION_FW Foundation)
if(_METAL_FW AND _FOUNDATION_FW)
message(STATUS "Metal framework found — building Metal backend (GPU + host tests)")
message(STATUS "Metal framework found -- building Metal backend (GPU + host tests)")
add_subdirectory(metal)
else()
message(WARNING "SECP256K1_BUILD_METAL=ON but Metal.framework not found. Building host tests only.")
add_subdirectory(metal)
endif()
else()
message(STATUS "SECP256K1_BUILD_METAL=ON on non-Apple platform — building host tests only")
message(STATUS "SECP256K1_BUILD_METAL=ON on non-Apple platform -- building host tests only")
add_subdirectory(metal)
endif()
endif()
@ -173,27 +173,27 @@ if(SECP256K1_BUILD_EXAMPLES)
add_subdirectory(examples)
endif()
# ── Audit infrastructure (standalone CTest targets + unified runner) ───────
# -- Audit infrastructure (standalone CTest targets + unified runner) -------
# All audit-specific targets live in audit/ to keep the library source clean.
if(SECP256K1_BUILD_CPU AND BUILD_TESTING)
add_subdirectory(audit)
endif()
# ── Stable C ABI layer (ufsecp_*) ─────────────────────────────────────────
# -- Stable C ABI layer (ufsecp_*) -----------------------------------------
option(SECP256K1_BUILD_CABI "Build the stable ufsecp_* C ABI library" ON)
if(SECP256K1_BUILD_CABI AND SECP256K1_BUILD_CPU)
add_subdirectory(include/ufsecp)
message(STATUS " C ABI (ufsecp): ON")
endif()
# ── Cross-library differential test ─────────────────────────────────────────
# Moved to audit/CMakeLists.txt — enable with -DSECP256K1_BUILD_CROSS_TESTS=ON
# -- Cross-library differential test -----------------------------------------
# Moved to audit/CMakeLists.txt -- enable with -DSECP256K1_BUILD_CROSS_TESTS=ON
# ── Parser fuzz tests ──────────────────────────────────────────────────────
# Moved to audit/CMakeLists.txt — enable with -DSECP256K1_BUILD_FUZZ_TESTS=ON
# -- Parser fuzz tests ------------------------------------------------------
# Moved to audit/CMakeLists.txt -- enable with -DSECP256K1_BUILD_FUZZ_TESTS=ON
# ── MuSig2 + FROST protocol tests ─────────────────────────────────────────
# Moved to audit/CMakeLists.txt — enable with -DSECP256K1_BUILD_PROTOCOL_TESTS=ON
# -- MuSig2 + FROST protocol tests -----------------------------------------
# Moved to audit/CMakeLists.txt -- enable with -DSECP256K1_BUILD_PROTOCOL_TESTS=ON
# Export targets
if(SECP256K1_INSTALL)
@ -246,7 +246,7 @@ if(SECP256K1_INSTALL)
endif()
endif()
# ── CPack packaging ─────────────────────────────────────────────────────────
# -- CPack packaging ---------------------------------------------------------
set(CPACK_PACKAGE_NAME "UltrafastSecp256k1")
set(CPACK_PACKAGE_VERSION "${PROJECT_VERSION}")
set(CPACK_PACKAGE_VENDOR "shrec")
@ -272,7 +272,7 @@ set(CPACK_DEBIAN_PACKAGE_DEPENDS "libc6 (>= 2.17)")
set(CPACK_DEBIAN_FILE_NAME DEB-DEFAULT)
set(CPACK_DEBIAN_PACKAGE_SHLIBDEPS ON)
# Map target arch → DEB architecture (critical for cross-compilation where
# Map target arch -> DEB architecture (critical for cross-compilation where
# dpkg --print-architecture returns the HOST arch, not the TARGET arch).
if(CMAKE_SYSTEM_PROCESSOR MATCHES "aarch64|ARM64")
set(CPACK_DEBIAN_PACKAGE_ARCHITECTURE "arm64")
@ -295,9 +295,9 @@ include(CPack)
# Summary
message(STATUS "")
message(STATUS "╔═══════════════════════════════════════════════════════════╗")
message(STATUS "║ UltrafastSecp256k1 Configuration ║")
message(STATUS "╚═══════════════════════════════════════════════════════════╝")
message(STATUS "+===========================================================+")
message(STATUS "| UltrafastSecp256k1 Configuration |")
message(STATUS "+===========================================================+")
message(STATUS " Version: ${PROJECT_VERSION}")
message(STATUS " Platform: ${SECP256K1_PLATFORM}")
message(STATUS " C++ Standard: ${CMAKE_CXX_STANDARD}")
@ -317,5 +317,5 @@ message(STATUS " Optimizations:")
message(STATUS " Assembly: ${SECP256K1_USE_ASM}")
message(STATUS " Speed First: ${SECP256K1_SPEED_FIRST}")
message(STATUS "")
message(STATUS "═══════════════════════════════════════════════════════════")
message(STATUS "===========================================================")
message(STATUS "")

48
CONTRIBUTING.md
View File

@ -2,22 +2,22 @@
Thank you for your interest in contributing to UltrafastSecp256k1! This document provides guidelines for contributing to the project.
## ⚠️ Requirements for Acceptable Contributions
## [!] Requirements for Acceptable Contributions
All contributions **MUST** comply with the following before they can be accepted:
1. **Coding Standards** — read and follow the [Coding Standards](https://github.com/shrec/UltrafastSecp256k1/blob/main/docs/CODING_STANDARDS.md) document in full
2. **All tests pass** — `ctest --test-dir build-dev --output-on-failure`
3. **Code formatted** — `clang-format -i <files>` (`.clang-format` config in repo root)
4. **No compiler warnings** — clean build with `-Wall -Wextra`
5. **License** — all contributions are licensed under [AGPL-3.0-or-later](https://github.com/shrec/UltrafastSecp256k1/blob/main/LICENSE)
6. **Security** — follow the [Security Policy](https://github.com/shrec/UltrafastSecp256k1/blob/main/SECURITY.md); never open public issues for vulnerabilities
1. **Coding Standards** -- read and follow the [Coding Standards](https://github.com/shrec/UltrafastSecp256k1/blob/main/docs/CODING_STANDARDS.md) document in full
2. **All tests pass** -- `ctest --test-dir build-dev --output-on-failure`
3. **Code formatted** -- `clang-format -i <files>` (`.clang-format` config in repo root)
4. **No compiler warnings** -- clean build with `-Wall -Wextra`
5. **License** -- all contributions are licensed under [AGPL-3.0-or-later](https://github.com/shrec/UltrafastSecp256k1/blob/main/LICENSE)
6. **Security** -- follow the [Security Policy](https://github.com/shrec/UltrafastSecp256k1/blob/main/SECURITY.md); never open public issues for vulnerabilities
Pull requests that do not meet these requirements will be rejected.
## 📋 Table of Contents
- [Requirements for Acceptable Contributions](#️-requirements-for-acceptable-contributions)
- [Requirements for Acceptable Contributions](#-requirements-for-acceptable-contributions)
- [Developer Certificate of Origin (DCO)](#developer-certificate-of-origin-dco)
- [Code of Conduct](#code-of-conduct)
- [Getting Started](#getting-started)
@ -203,7 +203,7 @@ TEST(FieldElement, MultiplicationIsCommutative) {
5. **Update documentation** if needed
6. **Add tests** for new features
A PR checklist template is automatically applied — see [.github/PULL_REQUEST_TEMPLATE.md](https://github.com/shrec/UltrafastSecp256k1/blob/main/.github/PULL_REQUEST_TEMPLATE.md).
A PR checklist template is automatically applied -- see [.github/PULL_REQUEST_TEMPLATE.md](https://github.com/shrec/UltrafastSecp256k1/blob/main/.github/PULL_REQUEST_TEMPLATE.md).
### Review Process
@ -238,24 +238,24 @@ A PR checklist template is automatically applied — see [.github/PULL_REQUEST_T
- **Zero-knowledge proof** integration
- **Threshold signatures** (FROST, GG20)
### Already Implemented ✅
### Already Implemented [OK]
The following were previously listed as desired contributions and are now part of v3.12:
- ✅ ARM64/AArch64 assembly optimizations (MUL/UMULH)
- ✅ OpenCL implementation (3.39M kG/s)
- ✅ WebAssembly port (Emscripten, npm package)
- ✅ Constant-time layer (ct:: namespace)
- ✅ ECDSA signatures (RFC 6979)
- ✅ Schnorr signatures (BIP-340)
- ✅ iOS support (XCFramework, SPM, CocoaPods)
- ✅ Android NDK support
- ✅ ROCm/HIP GPU support
- ✅ ESP32/STM32 embedded support
- ✅ Linux distribution packaging (DEB, RPM, Arch/AUR)
- ✅ Docker multi-stage build
- ✅ Clang-tidy CI integration
- ✅ GitHub Scorecard + OpenSSF Best Practices badge
- [OK] ARM64/AArch64 assembly optimizations (MUL/UMULH)
- [OK] OpenCL implementation (3.39M kG/s)
- [OK] WebAssembly port (Emscripten, npm package)
- [OK] Constant-time layer (ct:: namespace)
- [OK] ECDSA signatures (RFC 6979)
- [OK] Schnorr signatures (BIP-340)
- [OK] iOS support (XCFramework, SPM, CocoaPods)
- [OK] Android NDK support
- [OK] ROCm/HIP GPU support
- [OK] ESP32/STM32 embedded support
- [OK] Linux distribution packaging (DEB, RPM, Arch/AUR)
- [OK] Docker multi-stage build
- [OK] Clang-tidy CI integration
- [OK] GitHub Scorecard + OpenSSF Best Practices badge
## 🐛 Reporting Issues

162
GPU_TESTING_GUIDE.md
View File

@ -1,5 +1,5 @@
# GPU Testing & Benchmark Guide
## UltrafastSecp256k1 — OpenCL / CUDA / Metal
## UltrafastSecp256k1 -- OpenCL / CUDA / Metal
> This document guides testing of ALL GPU backends when switching to Linux/Apple.
@ -7,35 +7,35 @@
## 1. File Inventory (What Was Created)
### CUDA (reference — already complete)
- `cuda/include/hash160.cuh` — SHA-256 + RIPEMD-160 + Hash160
- `cuda/include/ecdsa.cuh` — ECDSA sign/verify
- `cuda/include/schnorr.cuh` — Schnorr BIP-340
- `cuda/include/ecdh.cuh` — ECDH shared secret
- `cuda/include/recovery.cuh` — Key recovery
- `cuda/include/msm.cuh` — Multi-scalar multiplication
- `cuda/src/test_suite.cu` — Full test suite
### CUDA (reference -- already complete)
- `cuda/include/hash160.cuh` -- SHA-256 + RIPEMD-160 + Hash160
- `cuda/include/ecdsa.cuh` -- ECDSA sign/verify
- `cuda/include/schnorr.cuh` -- Schnorr BIP-340
- `cuda/include/ecdh.cuh` -- ECDH shared secret
- `cuda/include/recovery.cuh` -- Key recovery
- `cuda/include/msm.cuh` -- Multi-scalar multiplication
- `cuda/src/test_suite.cu` -- Full test suite
### OpenCL
- `opencl/kernels/secp256k1_field.cl` — Field arithmetic (4×64-bit)
- `opencl/kernels/secp256k1_point.cl` — EC point operations
- `opencl/kernels/secp256k1_batch.cl` — Batch operations
- `opencl/kernels/secp256k1_affine.cl` — Affine conversions
- `opencl/kernels/secp256k1_extended.cl` — Scalar, SHA-256, HMAC, RFC6979, ECDSA, Schnorr, ECDH, Recovery, MSM (~1370 lines)
- `opencl/kernels/secp256k1_hash160.cl` — **NEW** — SHA-256 one-shot + RIPEMD-160 + Hash160
- `opencl/tests/opencl_extended_test.cpp` — **NEW** — Host-side test+bench
- `opencl/src/opencl_selftest.cpp` — Existing 40-test suite (field/point)
- `opencl/kernels/secp256k1_field.cl` -- Field arithmetic (4x64-bit)
- `opencl/kernels/secp256k1_point.cl` -- EC point operations
- `opencl/kernels/secp256k1_batch.cl` -- Batch operations
- `opencl/kernels/secp256k1_affine.cl` -- Affine conversions
- `opencl/kernels/secp256k1_extended.cl` -- Scalar, SHA-256, HMAC, RFC6979, ECDSA, Schnorr, ECDH, Recovery, MSM (~1370 lines)
- `opencl/kernels/secp256k1_hash160.cl` -- **NEW** -- SHA-256 one-shot + RIPEMD-160 + Hash160
- `opencl/tests/opencl_extended_test.cpp` -- **NEW** -- Host-side test+bench
- `opencl/src/opencl_selftest.cpp` -- Existing 40-test suite (field/point)
### Metal
- `metal/shaders/secp256k1_field.h` — Field arithmetic (8×32-bit)
- `metal/shaders/secp256k1_point.h` — EC point operations
- `metal/shaders/secp256k1_affine.h` — Affine conversions
- `metal/shaders/secp256k1_bloom.h` — Bloom filter (external — not part of this project)
- `metal/shaders/secp256k1_extended.h` — Scalar, SHA-256, HMAC, RFC6979, ECDSA, Schnorr, ECDH, Recovery, MSM (~680 lines)
- `metal/shaders/secp256k1_hash160.h` — **NEW** — SHA-256 one-shot + RIPEMD-160 + Hash160
- `metal/shaders/secp256k1_kernels.metal` — **UPDATED** — Now includes extended.h + hash160.h, 18 kernels total
- `metal/tests/metal_extended_test.mm` — **NEW** — Host-side test+bench
- `metal/src/metal_runtime.mm` — Existing Metal runtime
- `metal/shaders/secp256k1_field.h` -- Field arithmetic (8x32-bit)
- `metal/shaders/secp256k1_point.h` -- EC point operations
- `metal/shaders/secp256k1_affine.h` -- Affine conversions
- `metal/shaders/secp256k1_bloom.h` -- Bloom filter (external -- not part of this project)
- `metal/shaders/secp256k1_extended.h` -- Scalar, SHA-256, HMAC, RFC6979, ECDSA, Schnorr, ECDH, Recovery, MSM (~680 lines)
- `metal/shaders/secp256k1_hash160.h` -- **NEW** -- SHA-256 one-shot + RIPEMD-160 + Hash160
- `metal/shaders/secp256k1_kernels.metal` -- **UPDATED** -- Now includes extended.h + hash160.h, 18 kernels total
- `metal/tests/metal_extended_test.mm` -- **NEW** -- Host-side test+bench
- `metal/src/metal_runtime.mm` -- Existing Metal runtime
---
@ -43,31 +43,31 @@
| Feature | CUDA | OpenCL | Metal | Notes |
|-------------------|------|--------|-------|-------|
| Field add/sub/mul | ✅ | ✅ | ✅ | |
| Field inv/sqr | ✅ | ✅ | ✅ | |
| Field sqrt | ✅ | ✅ | ✅ | |
| Point add/double | ✅ | ✅ | ✅ | |
| Scalar mul (4-bit)| ✅ | ✅ | ✅ | |
| Batch inverse | ✅ | ✅ | ✅ | |
| Affine convert | ✅ | ✅ | ✅ | |
| Scalar mod-n ops | ✅ | ✅ | ✅ | |
| GLV endomorphism | ✅ | ✅ | ✅ | |
| SHA-256 streaming | ✅ | ✅ | ✅ | |
| SHA-256 one-shot | ✅ | ✅ | ✅ | For Hash160 |
| HMAC-SHA256 | ✅ | ✅ | ✅ | |
| RFC 6979 | ✅ | ✅ | ✅ | |
| ECDSA sign/verify | ✅ | ✅ | ✅ | |
| Schnorr BIP-340 | ✅ | ✅ | ✅ | |
| ECDH | ✅ | ✅ | ✅ | |
| Key Recovery | ✅ | ✅ | ✅ | |
| MSM / Pippenger | ✅ | ✅ | ✅ | |
| RIPEMD-160 | ✅ | ✅ | ✅ | |
| Hash160 | ✅ | ✅ | ✅ | |
| Bloom filter | ✅ | ❌ | ✅* | *External, not part of project |
| Field add/sub/mul | [OK] | [OK] | [OK] | |
| Field inv/sqr | [OK] | [OK] | [OK] | |
| Field sqrt | [OK] | [OK] | [OK] | |
| Point add/double | [OK] | [OK] | [OK] | |
| Scalar mul (4-bit)| [OK] | [OK] | [OK] | |
| Batch inverse | [OK] | [OK] | [OK] | |
| Affine convert | [OK] | [OK] | [OK] | |
| Scalar mod-n ops | [OK] | [OK] | [OK] | |
| GLV endomorphism | [OK] | [OK] | [OK] | |
| SHA-256 streaming | [OK] | [OK] | [OK] | |
| SHA-256 one-shot | [OK] | [OK] | [OK] | For Hash160 |
| HMAC-SHA256 | [OK] | [OK] | [OK] | |
| RFC 6979 | [OK] | [OK] | [OK] | |
| ECDSA sign/verify | [OK] | [OK] | [OK] | |
| Schnorr BIP-340 | [OK] | [OK] | [OK] | |
| ECDH | [OK] | [OK] | [OK] | |
| Key Recovery | [OK] | [OK] | [OK] | |
| MSM / Pippenger | [OK] | [OK] | [OK] | |
| RIPEMD-160 | [OK] | [OK] | [OK] | |
| Hash160 | [OK] | [OK] | [OK] | |
| Bloom filter | [OK] | [FAIL] | [OK]* | *External, not part of project |
---
## 3. Linux Testing — CUDA
## 3. Linux Testing -- CUDA
### Prerequisites
```bash
@ -96,7 +96,7 @@ ctest --test-dir Secp256K1fast/build_rel --output-on-failure
---
## 4. Linux Testing — OpenCL
## 4. Linux Testing -- OpenCL
### Prerequisites
```bash
@ -154,7 +154,7 @@ All 40 existing field/point tests: PASS
### Troubleshooting
- If kernel build fails: check `-cl-std=CL2.0` support, try removing it
- If `ulong` not available: device doesn't support 64-bit int — unusual for GPUs
- If `ulong` not available: device doesn't support 64-bit int -- unusual for GPUs
- Include path issues: ensure `-I kernels/` or place all `.cl` files in CWD
---
@ -210,32 +210,32 @@ field_mul(2, 3) = 6: PASS
```
### Metal Kernel List (18 kernels in secp256k1_kernels.metal)
1. `search_kernel` — Batch ECC search
2. `scalar_mul_batch` — Batch P×k
3. `generator_mul_batch` — Batch G×k
4. `field_mul_bench` — Benchmark
5. `field_sqr_bench` — Benchmark
6. `field_add_bench` — Benchmark
7. `field_sub_bench` — Benchmark
8. `field_inv_bench` — Benchmark
9. `batch_inverse` — Chunked Montgomery
10. `point_add_kernel` — Testing
11. `point_double_kernel` — Testing
12. `ecdsa_sign_batch` — Batch ECDSA sign
13. `ecdsa_verify_batch` — Batch ECDSA verify
14. `schnorr_sign_batch` — Batch Schnorr sign
15. `schnorr_verify_batch` — Batch Schnorr verify
16. `ecdh_batch` — Batch ECDH
17. `hash160_batch` — Batch Hash160
18. `ecrecover_batch` — Batch key recovery
19. `sha256_bench` — SHA-256 benchmark
20. `hash160_bench` — Hash160 benchmark
21. `ecdsa_bench` — ECDSA sign+verify benchmark
1. `search_kernel` -- Batch ECC search
2. `scalar_mul_batch` -- Batch Pxk
3. `generator_mul_batch` -- Batch Gxk
4. `field_mul_bench` -- Benchmark
5. `field_sqr_bench` -- Benchmark
6. `field_add_bench` -- Benchmark
7. `field_sub_bench` -- Benchmark
8. `field_inv_bench` -- Benchmark
9. `batch_inverse` -- Chunked Montgomery
10. `point_add_kernel` -- Testing
11. `point_double_kernel` -- Testing
12. `ecdsa_sign_batch` -- Batch ECDSA sign
13. `ecdsa_verify_batch` -- Batch ECDSA verify
14. `schnorr_sign_batch` -- Batch Schnorr sign
15. `schnorr_verify_batch` -- Batch Schnorr verify
16. `ecdh_batch` -- Batch ECDH
17. `hash160_batch` -- Batch Hash160
18. `ecrecover_batch` -- Batch key recovery
19. `sha256_bench` -- SHA-256 benchmark
20. `hash160_bench` -- Hash160 benchmark
21. `ecdsa_bench` -- ECDSA sign+verify benchmark
### Troubleshooting (Metal)
- "Function not found" — Add `#include "secp256k1_extended.h"` to kernels.metal (already done)
- Compile error on 64-bit int — Metal uses 8×32-bit limbs, no `ulong` needed
- MTLGPUFamilyApple9 error — Update Xcode or use `@available(macOS 14.0, *)`
- "Function not found" -- Add `#include "secp256k1_extended.h"` to kernels.metal (already done)
- Compile error on 64-bit int -- Metal uses 8x32-bit limbs, no `ulong` needed
- MTLGPUFamilyApple9 error -- Update Xcode or use `@available(macOS 14.0, *)`
---
@ -324,12 +324,12 @@ clang++ -std=c++17 -O2 -fobjc-arc -framework Metal -framework Foundation \
## 9. Architecture Notes
### Limb Sizes
- **CUDA**: 4×`uint64_t` (native 64-bit, PTX `mul.hi.u64`)
- **OpenCL**: 4×`ulong` (64-bit, `mul_hi()`)
- **Metal**: 8×`uint32_t` (no 64-bit int on Apple GPU!)
- **CUDA**: 4x`uint64_t` (native 64-bit, PTX `mul.hi.u64`)
- **OpenCL**: 4x`ulong` (64-bit, `mul_hi()`)
- **Metal**: 8x`uint32_t` (no 64-bit int on Apple GPU!)
### Key Differences
- Metal has NO 64-bit integer support on GPU → 8×32-bit with carry chains
- Metal has NO 64-bit integer support on GPU -> 8x32-bit with carry chains
- Metal uses `constant` instead of `__constant`
- Metal uses `thread` qualifier for private pointers
- Metal uses `[[buffer(N)]]` for buffer bindings
@ -339,11 +339,11 @@ clang++ -std=c++17 -O2 -fobjc-arc -framework Metal -framework Foundation \
### Hash160 Pipeline
```
pubkey (33 or 65 bytes)
→ SHA-256 (one-shot, big-endian output, 32 bytes)
→ RIPEMD-160 (two parallel chains, little-endian output, 20 bytes)
-> SHA-256 (one-shot, big-endian output, 32 bytes)
-> RIPEMD-160 (two parallel chains, little-endian output, 20 bytes)
= Hash160 (20 bytes)
```
---
> **Reminder**: Bloom filters are NOT part of this project — they should be external.
> **Reminder**: Bloom filters are NOT part of this project -- they should be external.

32
PORTING.md
View File

@ -1,4 +1,4 @@
# Porting Guide — UltrafastSecp256k1
# Porting Guide -- UltrafastSecp256k1
How to add a new CPU architecture, embedded target, or GPU backend to UltrafastSecp256k1.
@ -6,7 +6,7 @@ How to add a new CPU architecture, embedded target, or GPU backend to UltrafastS
## Overview
UltrafastSecp256k1 is designed for portability. The core library is pure C++20 with **zero external dependencies**. Platform-specific acceleration is layered on top via optional assembly and GPU backends. The portable C++ path compiles on any conforming compiler — all optimizations are additive.
UltrafastSecp256k1 is designed for portability. The core library is pure C++20 with **zero external dependencies**. Platform-specific acceleration is layered on top via optional assembly and GPU backends. The portable C++ path compiles on any conforming compiler -- all optimizations are additive.
---
@ -42,10 +42,10 @@ UltrafastSecp256k1 is designed for portability. The core library is pure C++20 w
- Add to `cpu/CMakeLists.txt` with architecture detection
4. **Optional: `__int128` support**
- If compiler supports `__int128`, the 5×52 field representation is used automatically
- If not (e.g., MSVC), the 4×64 portable path is used
- If compiler supports `__int128`, the 5x52 field representation is used automatically
- If not (e.g., MSVC), the 4x64 portable path is used
5. **Run benchmarks** — compare against portable C++ baseline:
5. **Run benchmarks** -- compare against portable C++ baseline:
```bash
./bench_comprehensive
```
@ -69,7 +69,7 @@ UltrafastSecp256k1 is designed for portability. The core library is pure C++20 w
### Minimum Requirements
- 32-bit or 64-bit CPU
- ~8 KB stack (for Jacobian→Affine batch operations)
- ~8 KB stack (for Jacobian->Affine batch operations)
- ~2 KB flash for minimal field/scalar code
- C++20 compiler (or C++17 with minor adjustments)
@ -93,7 +93,7 @@ UltrafastSecp256k1 is designed for portability. The core library is pure C++20 w
- Small batch sizes (reduce stack usage)
- No `std::vector`, no heap (embedded hot-path contract)
5. **Benchmark key operations**: At minimum, measure `Field Mul`, `Field Inv`, `Scalar × G`.
5. **Benchmark key operations**: At minimum, measure `Field Mul`, `Field Inv`, `Scalar x G`.
6. **Document in README**: Add to embedded comparison table.
@ -121,7 +121,7 @@ UltrafastSecp256k1 is designed for portability. The core library is pure C++20 w
2. **Port field arithmetic first**:
- `field_mul`, `field_sqr`, `field_add`, `field_sub`, `field_inv` (Fermat)
- 8×32-bit limb representation (like Metal) or 4×64-bit if hardware supports 64-bit int
- 8x32-bit limb representation (like Metal) or 4x64-bit if hardware supports 64-bit int
3. **Port point operations**:
- `point_add` (Jacobian), `point_dbl` (Jacobian)
@ -133,8 +133,8 @@ UltrafastSecp256k1 is designed for portability. The core library is pure C++20 w
- Backward pass: extract individual inverses
5. **Port scalar multiplication**:
- wNAF or fixed-window for k×G
- GLV endomorphism (optional, for 2× speedup)
- wNAF or fixed-window for kxG
- GLV endomorphism (optional, for 2x speedup)
6. **Add kernel benchmarks**: Field/Point/ScalarMul microbenchmarks.
@ -146,10 +146,10 @@ UltrafastSecp256k1 is designed for portability. The core library is pure C++20 w
| Backend | Directory | Limb Repr | Notes |
|---------|-----------|-----------|-------|
| CUDA | `cuda/` | 4×64-bit | `__int128`-like via PTX `mul.hi.u64` |
| OpenCL | `opencl/` | 4×64-bit | PTX inline asm on NVIDIA |
| Metal | `metal/` | 8×32-bit Comba | Apple GPU, no 64-bit int |
| ROCm/HIP | via `cuda/` | 4×64-bit | `__int128` fallback |
| CUDA | `cuda/` | 4x64-bit | `__int128`-like via PTX `mul.hi.u64` |
| OpenCL | `opencl/` | 4x64-bit | PTX inline asm on NVIDIA |
| Metal | `metal/` | 8x32-bit Comba | Apple GPU, no 64-bit int |
| ROCm/HIP | via `cuda/` | 4x64-bit | `__int128` fallback |
### Key Kernel Files to Study
@ -216,9 +216,9 @@ The selftest includes deterministic KAT vectors for:
5. Ensure CI passes (or explain cross-compilation setup)
6. Submit PR with:
- What platform/architecture
- Benchmark results (at least Field Mul, Field Inv, Scalar × G)
- Benchmark results (at least Field Mul, Field Inv, Scalar x G)
- Test results (selftest pass/fail count)
---
*UltrafastSecp256k1 v3.6.0 — Porting Guide*
*UltrafastSecp256k1 v3.6.0 -- Porting Guide*

382
README.md
View File

@ -1,19 +1,19 @@
# UltrafastSecp256k1 — Fastest Open-Source secp256k1 Library
# UltrafastSecp256k1 -- Fastest Open-Source secp256k1 Library
**Zero-dependency, multi-backend secp256k1 elliptic curve cryptography library** — GPU-accelerated ECDSA & Schnorr signatures, constant-time side-channel protection, 12+ platform targets inc. CUDA, Metal, OpenCL, ROCm, WebAssembly, RISC-V, ESP32, and STM32.
**Zero-dependency, multi-backend secp256k1 elliptic curve cryptography library** -- GPU-accelerated ECDSA & Schnorr signatures, constant-time side-channel protection, 12+ platform targets inc. CUDA, Metal, OpenCL, ROCm, WebAssembly, RISC-V, ESP32, and STM32.
> **4.88 M ECDSA signs/s** · **2.44 M ECDSA verifies/s** · **3.66 M Schnorr signs/s** · **2.82 M Schnorr verifies/s** — single GPU (RTX 5060 Ti)
> **4.88 M ECDSA signs/s** * **2.44 M ECDSA verifies/s** * **3.66 M Schnorr signs/s** * **2.82 M Schnorr verifies/s** -- single GPU (RTX 5060 Ti)
### Why UltrafastSecp256k1?
- **Fastest open-source GPU signatures** — no other library provides secp256k1 ECDSA + Schnorr sign/verify on CUDA, OpenCL, and Metal ([reproducible benchmark suite and raw logs](docs/BENCHMARKS.md))
- **Zero dependencies** — pure C++20, no Boost, no OpenSSL, compiles anywhere with a conforming compiler
- **Dual-layer security** — variable-time FAST path for throughput, constant-time CT path for secret-key operations
- **12+ platforms** — x86-64, ARM64, RISC-V, WASM, iOS, Android, ESP32, STM32, CUDA, Metal, OpenCL, ROCm
- **Fastest open-source GPU signatures** -- no other library provides secp256k1 ECDSA + Schnorr sign/verify on CUDA, OpenCL, and Metal ([reproducible benchmark suite and raw logs](docs/BENCHMARKS.md))
- **Zero dependencies** -- pure C++20, no Boost, no OpenSSL, compiles anywhere with a conforming compiler
- **Dual-layer security** -- variable-time FAST path for throughput, constant-time CT path for secret-key operations
- **12+ platforms** -- x86-64, ARM64, RISC-V, WASM, iOS, Android, ESP32, STM32, CUDA, Metal, OpenCL, ROCm
> **Benchmark reproducibility:** All numbers come from pinned compiler/driver/toolkit versions with exact commands and raw logs. See [`docs/BENCHMARKS.md`](docs/BENCHMARKS.md) (methodology) and the [live dashboard](https://shrec.github.io/UltrafastSecp256k1/dev/bench/).
**Quick links:** [Discord](https://discord.gg/sUmW7cc5) · [Benchmarks](docs/BENCHMARKS.md) · [Build Guide](docs/BUILDING.md) · [API Reference](docs/API_REFERENCE.md) · [Security Policy](SECURITY.md) · [Threat Model](THREAT_MODEL.md) · [Porting Guide](PORTING.md)
**Quick links:** [Discord](https://discord.gg/sUmW7cc5) * [Benchmarks](docs/BENCHMARKS.md) * [Build Guide](docs/BUILDING.md) * [API Reference](docs/API_REFERENCE.md) * [Security Policy](SECURITY.md) * [Threat Model](THREAT_MODEL.md) * [Porting Guide](PORTING.md)
---
@ -67,17 +67,17 @@
---
## ⚠️ Security Notice
## [!] Security Notice
**Research & Development Project — Not Audited**
**Research & Development Project -- Not Audited**
This library has **not undergone independent security audits**. It is provided for research, educational, and experimental purposes.
- ❌ Not recommended for production without independent cryptographic audit
- ✅ All self-tests pass (76/76 including all backends)
- ✅ Dual-layer constant-time architecture (FAST + CT always active)
- ✅ Stable C ABI (`ufsecp`) with 45 exported functions
- ✅ Fuzz-tested core arithmetic (libFuzzer + ASan)
- [FAIL] Not recommended for production without independent cryptographic audit
- [OK] All self-tests pass (76/76 including all backends)
- [OK] Dual-layer constant-time architecture (FAST + CT always active)
- [OK] Stable C ABI (`ufsecp`) with 45 exported functions
- [OK] Fuzz-tested core arithmetic (libFuzzer + ASan)
**Report vulnerabilities** via [GitHub Security Advisories](https://github.com/shrec/UltrafastSecp256k1/security/advisories/new) or email [payysoon@gmail.com](mailto:payysoon@gmail.com).
For production cryptographic systems, prefer audited libraries like [libsecp256k1](https://github.com/bitcoin-core/secp256k1).
@ -90,27 +90,27 @@ Features are organized into **maturity tiers** (see [SUPPORTED_GUARANTEES.md](in
| Tier | Category | Component | Status |
|------|----------|-----------|--------|
| **1 — Core** | Field / Scalar / Point | GLV, Precompute, Batch Inverse | ✅ |
| **1 — Core** | Assembly | x64 MASM/GAS, BMI2/ADX, ARM64, RISC-V RV64GC | ✅ |
| **1 — Core** | SIMD | AVX2/AVX-512 batch ops, Montgomery batch inverse | ✅ |
| **1 — Core** | Constant-Time | CT field/scalar/point — no secret-dependent branches | ✅ |
| **1 — Core** | ECDSA | Sign/Verify, RFC 6979, DER/Compact, low-S, Recovery | ✅ |
| **1 — Core** | Schnorr | BIP-340 sign/verify, tagged hashing, x-only pubkeys | ✅ |
| **1 — Core** | ECDH | Key exchange (raw, xonly, SHA-256) | ✅ |
| **1 — Core** | Multi-scalar | Strauss/Shamir dual-scalar multiplication | ✅ |
| **1 — Core** | Batch verify | ECDSA + Schnorr batch verification | ✅ |
| **1 — Core** | Hashing | SHA-256 (SHA-NI), SHA-512, HMAC, Keccak-256 | ✅ |
| **1 — Core** | C ABI | `ufsecp` stable FFI (45 exports) | ✅ |
| **2 — Protocol** | BIP-32/44 | HD derivation, path parsing, xprv/xpub, coin-type | ✅ |
| **2 — Protocol** | Taproot | BIP-341/342, tweak, Merkle tree | ✅ |
| **2 — Protocol** | MuSig2 | BIP-327, key aggregation, 2-round signing | ✅ |
| **2 — Protocol** | FROST | Threshold signatures, t-of-n | ✅ |
| **2 — Protocol** | Adaptor | Schnorr + ECDSA adaptor signatures | ✅ |
| **2 — Protocol** | Pedersen | Commitments, homomorphic, switch commitments | ✅ |
| **3 — Convenience** | Address | P2PKH, P2WPKH, P2TR, Base58, Bech32/m, EIP-55 | ✅ |
| **3 — Convenience** | Coins | 27 blockchains, auto-dispatch | ✅ |
| — | GPU | CUDA, Metal, OpenCL, ROCm kernels | ✅ |
| — | Platforms | x64, ARM64, RISC-V, ESP32, STM32, WASM, iOS, Android | ✅ |
| **1 -- Core** | Field / Scalar / Point | GLV, Precompute, Batch Inverse | [OK] |
| **1 -- Core** | Assembly | x64 MASM/GAS, BMI2/ADX, ARM64, RISC-V RV64GC | [OK] |
| **1 -- Core** | SIMD | AVX2/AVX-512 batch ops, Montgomery batch inverse | [OK] |
| **1 -- Core** | Constant-Time | CT field/scalar/point -- no secret-dependent branches | [OK] |
| **1 -- Core** | ECDSA | Sign/Verify, RFC 6979, DER/Compact, low-S, Recovery | [OK] |
| **1 -- Core** | Schnorr | BIP-340 sign/verify, tagged hashing, x-only pubkeys | [OK] |
| **1 -- Core** | ECDH | Key exchange (raw, xonly, SHA-256) | [OK] |
| **1 -- Core** | Multi-scalar | Strauss/Shamir dual-scalar multiplication | [OK] |
| **1 -- Core** | Batch verify | ECDSA + Schnorr batch verification | [OK] |
| **1 -- Core** | Hashing | SHA-256 (SHA-NI), SHA-512, HMAC, Keccak-256 | [OK] |
| **1 -- Core** | C ABI | `ufsecp` stable FFI (45 exports) | [OK] |
| **2 -- Protocol** | BIP-32/44 | HD derivation, path parsing, xprv/xpub, coin-type | [OK] |
| **2 -- Protocol** | Taproot | BIP-341/342, tweak, Merkle tree | [OK] |
| **2 -- Protocol** | MuSig2 | BIP-327, key aggregation, 2-round signing | [OK] |
| **2 -- Protocol** | FROST | Threshold signatures, t-of-n | [OK] |
| **2 -- Protocol** | Adaptor | Schnorr + ECDSA adaptor signatures | [OK] |
| **2 -- Protocol** | Pedersen | Commitments, homomorphic, switch commitments | [OK] |
| **3 -- Convenience** | Address | P2PKH, P2WPKH, P2TR, Base58, Bech32/m, EIP-55 | [OK] |
| **3 -- Convenience** | Coins | 27 blockchains, auto-dispatch | [OK] |
| -- | GPU | CUDA, Metal, OpenCL, ROCm kernels | [OK] |
| -- | Platforms | x64, ARM64, RISC-V, ESP32, STM32, WASM, iOS, Android | [OK] |
> **Tier 1** = battle-tested core crypto with stable API. **Tier 2** = protocol-level features, API may evolve. **Tier 3** = convenience utilities.
@ -120,25 +120,25 @@ Features are organized into **maturity tiers** (see [SUPPORTED_GUARANTEES.md](in
Get a working selftest in under a minute:
**Option A — Linux (apt)**
**Option A -- Linux (apt)**
```bash
sudo apt install libufsecp3
ufsecp_selftest # Expected: "OK (version 3.x, backend CPU)"
```
**Option B — npm (any OS)**
**Option B -- npm (any OS)**
```bash
npm i ufsecp
node -e "require('ufsecp').selftest()" # Expected: "OK"
```
**Option C — Python (any OS)**
**Option C -- Python (any OS)**
```bash
pip install ufsecp
python -c "import ufsecp; ufsecp.selftest()" # Expected: "OK"
```
**Option D — Build from source**
**Option D -- Build from source**
```bash
git clone https://github.com/shrec/UltrafastSecp256k1.git && cd UltrafastSecp256k1
cmake -S . -B build -G Ninja -DCMAKE_BUILD_TYPE=Release && cmake --build build -j
@ -151,25 +151,25 @@ cmake -S . -B build -G Ninja -DCMAKE_BUILD_TYPE=Release && cmake --build build -
| Target | Backend | Install / Entry Point | Status |
|--------|---------|----------------------|--------|
| **Linux x64** | CPU | `apt install libufsecp3` | ✅ Stable |
| **Windows x64** | CPU | NuGet `UltrafastSecp256k1` / [Release .zip](https://github.com/shrec/UltrafastSecp256k1/releases) | ✅ Stable |
| **macOS (x64/ARM64)** | CPU + Metal | `brew install ufsecp` / build from source | ✅ Stable |
| **Android ARM64** | CPU | `implementation 'io.github.shrec:ufsecp'` (Maven) | ✅ Stable |
| **iOS ARM64** | CPU | Swift Package / CocoaPods / XCFramework | ✅ Stable |
| **Browser / Node.js** | WASM | `npm i ufsecp` | ✅ Stable |
| **ESP32-S3 / ESP32** | CPU | PlatformIO / IDF component | ✅ Tested |
| **STM32 (Cortex-M)** | CPU | CMake cross-compile | ✅ Tested |
| **NVIDIA GPU** | CUDA 12+ | Build with `-DSECP256K1_BUILD_CUDA=ON` | ✅ Stable |
| **AMD GPU** | ROCm/HIP | Build with `-DSECP256K1_BUILD_ROCM=ON` | ⚠️ Beta |
| **Apple GPU** | Metal | Build with Metal backend | ✅ Stable |
| **Any GPU** | OpenCL | Build with `-DSECP256K1_BUILD_OPENCL=ON` | ⚠️ Beta |
| **RISC-V (RV64GC)** | CPU | Cross-compile | ✅ Tested |
| **Linux x64** | CPU | `apt install libufsecp3` | [OK] Stable |
| **Windows x64** | CPU | NuGet `UltrafastSecp256k1` / [Release .zip](https://github.com/shrec/UltrafastSecp256k1/releases) | [OK] Stable |
| **macOS (x64/ARM64)** | CPU + Metal | `brew install ufsecp` / build from source | [OK] Stable |
| **Android ARM64** | CPU | `implementation 'io.github.shrec:ufsecp'` (Maven) | [OK] Stable |
| **iOS ARM64** | CPU | Swift Package / CocoaPods / XCFramework | [OK] Stable |
| **Browser / Node.js** | WASM | `npm i ufsecp` | [OK] Stable |
| **ESP32-S3 / ESP32** | CPU | PlatformIO / IDF component | [OK] Tested |
| **STM32 (Cortex-M)** | CPU | CMake cross-compile | [OK] Tested |
| **NVIDIA GPU** | CUDA 12+ | Build with `-DSECP256K1_BUILD_CUDA=ON` | [OK] Stable |
| **AMD GPU** | ROCm/HIP | Build with `-DSECP256K1_BUILD_ROCM=ON` | [!] Beta |
| **Apple GPU** | Metal | Build with Metal backend | [OK] Stable |
| **Any GPU** | OpenCL | Build with `-DSECP256K1_BUILD_OPENCL=ON` | [!] Beta |
| **RISC-V (RV64GC)** | CPU | Cross-compile | [OK] Tested |
---
## Installation
### Linux (APT — Debian / Ubuntu)
### Linux (APT -- Debian / Ubuntu)
```bash
# Add repository
@ -181,11 +181,11 @@ sudo apt update
# Install (runtime only)
sudo apt install libufsecp3
# Install (development — headers, static lib, cmake/pkgconfig)
# Install (development -- headers, static lib, cmake/pkgconfig)
sudo apt install libufsecp-dev
```
### Linux (RPM — Fedora / RHEL)
### Linux (RPM -- Fedora / RHEL)
```bash
# Download from GitHub Releases
@ -240,11 +240,11 @@ UltrafastSecp256k1 is the **only open-source library** that provides full secp25
| Backend | Hardware | kG/s | ECDSA Sign | ECDSA Verify | Schnorr Sign | Schnorr Verify |
|---------|----------|------|------------|--------------|--------------|----------------|
| **CUDA** | RTX 5060 Ti | 4.59 M/s | 4.88 M/s | 2.44 M/s | 3.66 M/s | 2.82 M/s |
| **OpenCL** | RTX 5060 Ti | 3.39 M/s | — | — | — | — |
| **Metal** | Apple M3 Pro | 0.33 M/s | — | — | — | — |
| **ROCm (HIP)** | AMD GPUs | Portable | — | — | — | — |
| **OpenCL** | RTX 5060 Ti | 3.39 M/s | -- | -- | -- | -- |
| **Metal** | Apple M3 Pro | 0.33 M/s | -- | -- | -- | -- |
| **ROCm (HIP)** | AMD GPUs | Portable | -- | -- | -- | -- |
*CUDA 12.0, sm_86;sm_89, batch=16K signatures. Metal 2.4, 8×32-bit Comba limbs, 18 GPU cores.*
*CUDA 12.0, sm_86;sm_89, batch=16K signatures. Metal 2.4, 8x32-bit Comba limbs, 18 GPU cores.*
### CUDA Core ECC Operations (Kernel-Only Throughput)
@ -255,10 +255,10 @@ UltrafastSecp256k1 is the **only open-source library** that provides full secp25
| Field Inv | 10.2 ns | 98.35 M/s |
| Point Add | 1.6 ns | 619 M/s |
| Point Double | 0.8 ns | 1,282 M/s |
| Scalar Mul (P×k) | 225.8 ns | 4.43 M/s |
| Generator Mul (G×k) | 217.7 ns | 4.59 M/s |
| Scalar Mul (Pxk) | 225.8 ns | 4.43 M/s |
| Generator Mul (Gxk) | 217.7 ns | 4.59 M/s |
| Batch Inv (Montgomery) | 2.9 ns | 340 M/s |
| Jac→Affine (per-pt) | 14.9 ns | 66.9 M/s |
| Jac->Affine (per-pt) | 14.9 ns | 66.9 M/s |
### GPU Signature Operations (ECDSA + Schnorr)
@ -275,14 +275,14 @@ UltrafastSecp256k1 is the **only open-source library** that provides full secp25
| Operation | CUDA | OpenCL | Winner |
|-----------|------|--------|--------|
| Field Mul | 0.2 ns | 0.2 ns | Tie |
| Field Inv | 10.2 ns | 14.3 ns | **CUDA 1.40×** |
| Point Double | 0.8 ns | 0.9 ns | **CUDA 1.13×** |
| Field Inv | 10.2 ns | 14.3 ns | **CUDA 1.40x** |
| Point Double | 0.8 ns | 0.9 ns | **CUDA 1.13x** |
| Point Add | 1.6 ns | 1.6 ns | Tie |
| kG (Generator Mul) | 217.7 ns | 295.1 ns | **CUDA 1.36×** |
| kG (Generator Mul) | 217.7 ns | 295.1 ns | **CUDA 1.36x** |
*Benchmarks: 2026-02-14, Linux x86_64, NVIDIA Driver 580.126.09. Both kernel-only (no buffer allocation/copy overhead).*
### Apple Metal (M3 Pro) — Kernel-Only
### Apple Metal (M3 Pro) -- Kernel-Only
| Operation | Time/Op | Throughput |
|-----------|---------|------------|
@ -290,10 +290,10 @@ UltrafastSecp256k1 is the **only open-source library** that provides full secp25
| Field Inv | 106.4 ns | 9.40 M/s |
| Point Add | 10.1 ns | 98.6 M/s |
| Point Double | 5.1 ns | 196 M/s |
| Scalar Mul (P×k) | 2.94 μs | 0.34 M/s |
| Generator Mul (G×k) | 3.00 μs | 0.33 M/s |
| Scalar Mul (Pxk) | 2.94 us | 0.34 M/s |
| Generator Mul (Gxk) | 3.00 us | 0.33 M/s |
*Metal 2.4, 8×32-bit Comba limbs, Apple M3 Pro (18 GPU cores, Unified Memory 18 GB)*
*Metal 2.4, 8x32-bit Comba limbs, Apple M3 Pro (18 GPU cores, Unified Memory 18 GB)*
---
@ -302,21 +302,21 @@ UltrafastSecp256k1 is the **only open-source library** that provides full secp25
Full signature support across CPU and GPU:
- **ECDSA**: RFC 6979 deterministic nonces, low-S normalization, DER/Compact encoding, public key recovery (recid)
- **Schnorr**: BIP-340 compliant — tagged hashing, x-only public keys
- **Schnorr**: BIP-340 compliant -- tagged hashing, x-only public keys
- **Batch verification**: ECDSA and Schnorr batch verify
- **Multi-scalar**: Shamir's trick (k₁×G + k₂×Q) for fast verification
- **Multi-scalar**: Shamir's trick (k_1xG + k_2xQ) for fast verification
### CPU Signature Benchmarks (x86-64, Clang 19, AVX2, Release)
| Operation | Time | Throughput |
|-----------|------:|----------:|
| ECDSA Sign (RFC 6979) | 8.5 μs | 118,000 op/s |
| ECDSA Verify | 23.6 μs | 42,400 op/s |
| Schnorr Sign (BIP-340) | 6.8 μs | 146,000 op/s |
| Schnorr Verify (BIP-340) | 24.0 μs | 41,600 op/s |
| Key Generation (CT) | 9.5 μs | 105,500 op/s |
| Key Generation (fast) | 5.5 μs | 182,000 op/s |
| ECDH | 23.9 μs | 41,800 op/s |
| ECDSA Sign (RFC 6979) | 8.5 us | 118,000 op/s |
| ECDSA Verify | 23.6 us | 42,400 op/s |
| Schnorr Sign (BIP-340) | 6.8 us | 146,000 op/s |
| Schnorr Verify (BIP-340) | 24.0 us | 41,600 op/s |
| Key Generation (CT) | 9.5 us | 105,500 op/s |
| Key Generation (fast) | 5.5 us | 182,000 op/s |
| ECDH | 23.9 us | 41,800 op/s |
*Schnorr sign is ~25% faster than ECDSA sign due to simpler nonce derivation (no modular inverse). Measured single-core, pinned, 2026-02-21.*
@ -324,15 +324,15 @@ Full signature support across CPU and GPU:
## Constant-Time secp256k1 (Side-Channel Resistance)
The `ct::` namespace provides constant-time operations for secret-key material — no secret-dependent branches or memory access patterns:
The `ct::` namespace provides constant-time operations for secret-key material -- no secret-dependent branches or memory access patterns:
| Operation | Fast | CT | Overhead |
|-----------|------:|------:|--------:|
| Field Mul | 17 ns | 23 ns | 1.08× |
| Field Inverse | 0.8 μs | 1.7 μs | 2.05× |
| Complete Addition | — | 276 ns | — |
| Scalar Mul (k×P) | 23.6 μs | 26.6 μs | 1.13× |
| Generator Mul (k×G) | 5.3 μs | 9.9 μs | 1.86× |
| Field Mul | 17 ns | 23 ns | 1.08x |
| Field Inverse | 0.8 us | 1.7 us | 2.05x |
| Complete Addition | -- | 276 ns | -- |
| Scalar Mul (kxP) | 23.6 us | 26.6 us | 1.13x |
| Generator Mul (kxG) | 5.3 us | 9.9 us | 1.86x |
**CT layer provides:** `ct::field_mul`, `ct::field_inv`, `ct::scalar_mul`, `ct::point_add_complete`, `ct::point_dbl`
@ -345,17 +345,17 @@ See [THREAT_MODEL.md](THREAT_MODEL.md) for a full layer-by-layer risk assessment
| Evidence | Scope | Status |
|----------|-------|--------|
| **No secret-dependent branches** | All `ct::` functions | ✅ Enforced by design, verified via Clang-Tidy checks |
| **No secret-dependent memory access** | All `ct::` table lookups use constant-index cmov | ✅ |
| **ASan + UBSan CI** | Every push — catches undefined behavior in CT paths | ✅ CI |
| **No secret-dependent branches** | All `ct::` functions | [OK] Enforced by design, verified via Clang-Tidy checks |
| **No secret-dependent memory access** | All `ct::` table lookups use constant-index cmov | [OK] |
| **ASan + UBSan CI** | Every push -- catches undefined behavior in CT paths | [OK] CI |
| **Timing tests (dudect)** | CPU field/scalar ops | 🔜 Planned (see [roadmap](ROADMAP.md)) |
| **Formal CT verification** | Fiat-Crypto style | 🔜 Planned |
**Assumptions:** CT guarantees depend on compiler not introducing secret-dependent branches during optimization. Builds use `-O2` with Clang; MSVC may require additional flags. Micro-architectural side channels (Spectre, power analysis) are outside current scope — see [THREAT_MODEL.md](THREAT_MODEL.md).
**Assumptions:** CT guarantees depend on compiler not introducing secret-dependent branches during optimization. Builds use `-O2` with Clang; MSVC may require additional flags. Micro-architectural side channels (Spectre, power analysis) are outside current scope -- see [THREAT_MODEL.md](THREAT_MODEL.md).
---
## secp256k1 Benchmarks — Cross-Platform Comparison
## secp256k1 Benchmarks -- Cross-Platform Comparison
### CPU: x86-64 vs ARM64 vs RISC-V
@ -364,10 +364,10 @@ See [THREAT_MODEL.md](THREAT_MODEL.md) for a full layer-by-layer risk assessment
| Field Mul | 17 ns | 74 ns | 95 ns |
| Field Square | 14 ns | 50 ns | 70 ns |
| Field Add | 1 ns | 8 ns | 11 ns |
| Field Inverse | 1 μs | 2 μs | 4 μs |
| Point Add | 159 ns | 992 ns | 1 μs |
| Generator Mul (k×G) | 5 μs | 14 μs | 33 μs |
| Scalar Mul (k×P) | 25 μs | 131 μs | 154 μs |
| Field Inverse | 1 us | 2 us | 4 us |
| Point Add | 159 ns | 992 ns | 1 us |
| Generator Mul (kxG) | 5 us | 14 us | 33 us |
| Scalar Mul (kxP) | 25 us | 131 us | 154 us |
### GPU: CUDA vs OpenCL vs Metal
@ -376,7 +376,7 @@ See [THREAT_MODEL.md](THREAT_MODEL.md) for a full layer-by-layer risk assessment
| Field Mul | 0.2 ns | 0.2 ns | 1.9 ns |
| Field Inv | 10.2 ns | 14.3 ns | 106.4 ns |
| Point Add | 1.6 ns | 1.6 ns | 10.1 ns |
| Generator Mul (G×k) | 217.7 ns | 295.1 ns | 3.00 μs |
| Generator Mul (Gxk) | 217.7 ns | 295.1 ns | 3.00 us |
### Embedded: ESP32-S3 vs ESP32 vs STM32
@ -385,21 +385,21 @@ See [THREAT_MODEL.md](THREAT_MODEL.md) for a full layer-by-layer risk assessment
| Field Mul | 6,105 ns | 6,993 ns | 15,331 ns |
| Field Square | 5,020 ns | 6,247 ns | 12,083 ns |
| Field Add | 850 ns | 985 ns | 4,139 ns |
| Field Inv | 2,524 μs | 609 μs | 1,645 μs |
| **Fast** Scalar × G | 5,226 μs | 6,203 μs | 37,982 μs |
| **CT** Scalar × G | 15,527 μs | — | — |
| **CT** Generator × k | 4,951 μs | — | — |
| Field Inv | 2,524 us | 609 us | 1,645 us |
| **Fast** Scalar x G | 5,226 us | 6,203 us | 37,982 us |
| **CT** Scalar x G | 15,527 us | -- | -- |
| **CT** Generator x k | 4,951 us | -- | -- |
### Field Representation: 5×52 vs 4×64
### Field Representation: 5x52 vs 4x64
| Operation | 4×64 | 5×52 | Speedup |
| Operation | 4x64 | 5x52 | Speedup |
|-----------|------:|------:|--------:|
| Multiplication | 42 ns | 15 ns | **2.76×** |
| Squaring | 31 ns | 13 ns | **2.44×** |
| Addition | 4.3 ns | 1.6 ns | **2.69×** |
| Add chain (32 ops) | 286 ns | 57 ns | **5.01×** |
| Multiplication | 42 ns | 15 ns | **2.76x** |
| Squaring | 31 ns | 13 ns | **2.44x** |
| Addition | 4.3 ns | 1.6 ns | **2.69x** |
| Add chain (32 ops) | 286 ns | 57 ns | **5.01x** |
*5×52 uses `__int128` lazy reduction — ideal for 64-bit platforms.*
*5x52 uses `__int128` lazy reduction -- ideal for 64-bit platforms.*
For full benchmark results, see [docs/BENCHMARKS.md](docs/BENCHMARKS.md).
@ -409,10 +409,10 @@ For full benchmark results, see [docs/BENCHMARKS.md](docs/BENCHMARKS.md).
UltrafastSecp256k1 runs on resource-constrained microcontrollers with **portable C++ (no `__int128`, no assembly required)**:
- **ESP32-S3** (Xtensa LX7 @ 240 MHz): Fast scalar × G in 5.2 ms, **CT generator × k in 4.9 ms**
- **ESP32-PICO-D4** (Xtensa LX6 @ 240 MHz): Scalar × G in 6.2 ms, CT layer available (44.8 ms CT)
- **STM32F103** (ARM Cortex-M3 @ 72 MHz): Scalar × G in 38 ms with ARM inline assembly (UMULL/ADDS/ADCS)
- **Android ARM64** (RK3588, Cortex-A76 @ 2.256 GHz): Scalar × G in 14 μs, Scalar × P in 131 μs, ECDSA Sign 30 μs
- **ESP32-S3** (Xtensa LX7 @ 240 MHz): Fast scalar x G in 5.2 ms, **CT generator x k in 4.9 ms**
- **ESP32-PICO-D4** (Xtensa LX6 @ 240 MHz): Scalar x G in 6.2 ms, CT layer available (44.8 ms CT)
- **STM32F103** (ARM Cortex-M3 @ 72 MHz): Scalar x G in 38 ms with ARM inline assembly (UMULL/ADDS/ADCS)
- **Android ARM64** (RK3588, Cortex-A76 @ 2.256 GHz): Scalar x G in 14 us, Scalar x P in 131 us, ECDSA Sign 30 us
All 37 library tests pass on every embedded target. See [examples/esp32_test/](examples/esp32_test/) and [examples/stm32_test/](examples/stm32_test/).
@ -424,10 +424,10 @@ See [PORTING.md](PORTING.md) for a step-by-step checklist to add new CPU archite
## WASM secp256k1 (Browser & Node.js)
WebAssembly build via Emscripten — runs secp256k1 in any modern browser or Node.js:
WebAssembly build via Emscripten -- runs secp256k1 in any modern browser or Node.js:
```bash
./scripts/build_wasm.sh # → build/wasm/dist/
./scripts/build_wasm.sh # -> build/wasm/dist/
```
Output: `secp256k1_wasm.wasm` + `secp256k1.mjs` (ES6 module with TypeScript declarations).
@ -437,7 +437,7 @@ See [wasm/README.md](wasm/README.md) for JavaScript/TypeScript integration.
## secp256k1 Batch Modular Inverse (Montgomery Trick)
All backends include **batch modular inversion** — a critical building block for Jacobian→Affine conversion:
All backends include **batch modular inversion** -- a critical building block for Jacobian->Affine conversion:
| Backend | Function | Notes |
|---------|----------|-------|
@ -446,9 +446,9 @@ All backends include **batch modular inversion** — a critical building block f
| **Metal** | `batch_inverse` | Chunked parallel threadgroups |
| **OpenCL** | Inline PTX inverse | Batch via host orchestration |
**Algorithm**: Montgomery batch inverse computes N field inversions using only **1 modular inversion + 3(N−1) multiplications**, amortizing the expensive inversion across the entire batch.
**Algorithm**: Montgomery batch inverse computes N field inversions using only **1 modular inversion + 3(N-1) multiplications**, amortizing the expensive inversion across the entire batch.
For N=1024: ~500× cheaper than individual inversions. A single field inversion costs ~3.5 μs (Fermat), while batch amortizes to ~7 ns per element.
For N=1024: ~500x cheaper than individual inversions. A single field inversion costs ~3.5 us (Fermat), while batch amortizes to ~7 ns per element.
### Mixed Addition (Jacobian + Affine)
@ -474,7 +474,7 @@ for (int i = 0; i < 1000; ++i) {
### GPU Pattern: H-Product Serial Inversion
Production GPU apps use a memory-efficient variant: instead of storing full Z coordinates, `jacobian_add_mixed_h` returns **H = U2 − X1** separately. Since Z_k = Z_0 · H_0 · H_1 · … · H_{k-1}, the entire Z chain is invertible from H values + initial Z_0.
Production GPU apps use a memory-efficient variant: instead of storing full Z coordinates, `jacobian_add_mixed_h` returns **H = U2 - X1** separately. Since Z_k = Z_0 * H_0 * H_1 * … * H_{k-1}, the entire Z chain is invertible from H values + initial Z_0.
**Cost**: 1 Fermat inversion + 2N multiplications per thread (vs N Fermat inversions naively).
@ -482,29 +482,29 @@ Production GPU apps use a memory-efficient variant: instead of storing full Z co
---
## secp256k1 Stable C ABI (`ufsecp`) — FFI Bindings
## secp256k1 Stable C ABI (`ufsecp`) -- FFI Bindings
Starting with **v3.4.0**, UltrafastSecp256k1 ships a stable C ABI — `ufsecp` — designed for FFI bindings (C#, Python, Rust, Go, Java, Node.js, etc.):
Starting with **v3.4.0**, UltrafastSecp256k1 ships a stable C ABI -- `ufsecp` -- designed for FFI bindings (C#, Python, Rust, Go, Java, Node.js, etc.):
```
┌──────────────────────────────────────────────────┐
│ Your Application │
│ (C, C#, Python, Go, Rust, …) │
└──────────────────┬───────────────────────────────┘
│ ufsecp C ABI (45 functions)
┌──────────────────▼───────────────────────────────┐
│ ufsecp.dll / libufsecp.so │
│ Opaque ctx │ Error model │ ABI versioning │
├──────────────┴───────────────┴───────────────────┤
│ FAST layer (variable-time public ops) │
├──────────────────────────────────────────────────┤
│ CT layer (constant-time secret-key ops) │
└──────────────────────────────────────────────────┘
+--------------------------------------------------+
| Your Application |
| (C, C#, Python, Go, Rust, …) |
+------------------+-------------------------------+
| ufsecp C ABI (45 functions)
+------------------▼-------------------------------+
| ufsecp.dll / libufsecp.so |
| Opaque ctx | Error model | ABI versioning |
+--------------+---------------+-------------------+
| FAST layer (variable-time public ops) |
+--------------------------------------------------+
| CT layer (constant-time secret-key ops) |
+--------------------------------------------------+
```
**Default behavior:**
- **C ABI (`ufsecp`)**: Defaults to safe behavior — all secret-key operations (sign, derive, ECDH) use CT internally. No configuration needed.
- **C++ API**: Exposes both `fast::` and `ct::` namespaces — the developer chooses explicitly per call site.
- **C ABI (`ufsecp`)**: Defaults to safe behavior -- all secret-key operations (sign, derive, ECDH) use CT internally. No configuration needed.
- **C++ API**: Exposes both `fast::` and `ct::` namespaces -- the developer chooses explicitly per call site.
### Quick Start (C)
@ -552,20 +552,20 @@ See [SUPPORTED_GUARANTEES.md](include/ufsecp/SUPPORTED_GUARANTEES.md) for Tier 1
## secp256k1 Use Cases
- **Transaction Signing & Verification** — Bitcoin, Ethereum, and 25+ blockchain transaction signing at CPU or GPU scale
- **Batch Signature Verification** — verify thousands of ECDSA/Schnorr signatures per second for block validation
- **HD Wallet Key Derivation** — BIP-32/44 hierarchical deterministic derivation with 27-coin address generation
- **Embedded IoT Signing** — ESP32 and STM32 on-device key generation and transaction signing
- **High-Throughput Indexing** — GPU-accelerated public key derivation for address indexing services
- **Zero-Knowledge Proof Systems** — Pedersen commitments, adaptor signatures for ZK protocols
- **Multi-Party Computation** — MuSig2 (BIP-327) and FROST threshold signing
- **Cross-Platform Cryptographic Services** — single codebase across server (CUDA), desktop (OpenCL/Metal), mobile (ARM64), browser (WASM), and embedded (ESP32/STM32)
- **Cryptographic Research & Benchmarking** — field/group operation microbenchmarks, algorithm variant comparison
- **Transaction Signing & Verification** -- Bitcoin, Ethereum, and 25+ blockchain transaction signing at CPU or GPU scale
- **Batch Signature Verification** -- verify thousands of ECDSA/Schnorr signatures per second for block validation
- **HD Wallet Key Derivation** -- BIP-32/44 hierarchical deterministic derivation with 27-coin address generation
- **Embedded IoT Signing** -- ESP32 and STM32 on-device key generation and transaction signing
- **High-Throughput Indexing** -- GPU-accelerated public key derivation for address indexing services
- **Zero-Knowledge Proof Systems** -- Pedersen commitments, adaptor signatures for ZK protocols
- **Multi-Party Computation** -- MuSig2 (BIP-327) and FROST threshold signing
- **Cross-Platform Cryptographic Services** -- single codebase across server (CUDA), desktop (OpenCL/Metal), mobile (ARM64), browser (WASM), and embedded (ESP32/STM32)
- **Cryptographic Research & Benchmarking** -- field/group operation microbenchmarks, algorithm variant comparison
> ### Testers Wanted
> We need community testers for platforms we cannot fully validate in CI:
> - **iOS** — Build & run on real iPhone/iPad hardware with Xcode
> - **AMD GPU (ROCm/HIP)** — Test on AMD Radeon RX / Instinct GPUs
> - **iOS** -- Build & run on real iPhone/iPad hardware with Xcode
> - **AMD GPU (ROCm/HIP)** -- Test on AMD Radeon RX / Instinct GPUs
>
> [Open an issue](https://github.com/shrec/UltrafastSecp256k1/issues) with your results!
@ -599,13 +599,13 @@ cmake --build build -j
### WebAssembly (Emscripten)
```bash
./scripts/build_wasm.sh # → build/wasm/dist/
./scripts/build_wasm.sh # -> build/wasm/dist/
```
### iOS (XCFramework)
```bash
./scripts/build_xcframework.sh # → build/xcframework/output/
./scripts/build_xcframework.sh # -> build/xcframework/output/
```
Universal XCFramework (arm64 device + arm64 simulator). Also available via **Swift Package Manager** and **CocoaPods**.
@ -640,7 +640,7 @@ For detailed build instructions, see [docs/BUILDING.md](docs/BUILDING.md).
using namespace secp256k1::fast;
int main() {
// Public key derivation: private_key × G = public_key
// Public key derivation: private_key x G = public_key
auto generator = Point::generator();
auto private_key = Scalar::from_hex(
"E9873D79C6D87DC0FB6A5778633389F4453213303DA61F20BD67FC233AA33262"
@ -683,18 +683,18 @@ int main() {
## secp256k1 Security Model (FAST vs CT)
Two security profiles are **always active** — no flag-based selection:
Two security profiles are **always active** -- no flag-based selection:
### FAST Profile (Default)
- Maximum throughput, variable-time algorithms
- Use for: verification, batch processing, public key derivation, benchmarking
- ⚠️ **Not safe for secret key operations** — timing side-channels possible
- [!] **Not safe for secret key operations** -- timing side-channels possible
### CT / Hardened Profile (`ct::` namespace)
- Constant-time arithmetic — no secret-dependent branches or memory access
- ~5–7× performance penalty vs FAST
- Constant-time arithmetic -- no secret-dependent branches or memory access
- ~5-7x performance penalty vs FAST
- Use for: signing, private key handling, nonce generation, ECDH
**Choose the appropriate profile for your use case.** Using FAST with secret data is a security vulnerability.
@ -742,21 +742,21 @@ All EVM chains (ETH, BNB, MATIC, AVAX, FTM, ARB, OP) share the same address form
```
UltrafastSecp256k1/
├── cpu/ # CPU-optimized implementation
│ ├── include/ # Public headers (field.hpp, scalar.hpp, point.hpp, ecdsa.hpp, schnorr.hpp)
│ ├── src/ # Implementation (field_asm_x64.asm, field_asm_riscv64.S, ...)
│ ├── fuzz/ # libFuzzer harnesses
│ └── tests/ # Unit tests
├── cuda/ # CUDA GPU acceleration
├── opencl/ # OpenCL GPU acceleration
├── metal/ # Apple Metal GPU acceleration
├── wasm/ # WebAssembly (Emscripten)
├── android/ # Android NDK (ARM64)
├── include/ufsecp/ # Stable C ABI
├── examples/
│ ├── esp32_test/ # ESP32-S3 Xtensa LX7 port
│ └── stm32_test/ # STM32F103 ARM Cortex-M3 port
└── docs/ # Documentation
+-- cpu/ # CPU-optimized implementation
| +-- include/ # Public headers (field.hpp, scalar.hpp, point.hpp, ecdsa.hpp, schnorr.hpp)
| +-- src/ # Implementation (field_asm_x64.asm, field_asm_riscv64.S, ...)
| +-- fuzz/ # libFuzzer harnesses
| +-- tests/ # Unit tests
+-- cuda/ # CUDA GPU acceleration
+-- opencl/ # OpenCL GPU acceleration
+-- metal/ # Apple Metal GPU acceleration
+-- wasm/ # WebAssembly (Emscripten)
+-- android/ # Android NDK (ARM64)
+-- include/ufsecp/ # Stable C ABI
+-- examples/
| +-- esp32_test/ # ESP32-S3 Xtensa LX7 port
| +-- stm32_test/ # STM32F103 ARM Cortex-M3 port
+-- docs/ # Documentation
```
---
@ -804,15 +804,15 @@ libFuzzer harnesses cover core arithmetic (`cpu/fuzz/`):
| Platform | Backend | Compiler | Status |
|----------|---------|----------|--------|
| Linux x64 | CPU | GCC 13 / Clang 17 | ✅ CI |
| Linux x64 | CPU | Clang 17 (ASan+UBSan) | ✅ CI |
| Linux x64 | CPU | Clang 17 (TSan) | ✅ CI |
| Windows x64 | CPU | MSVC 2022 | ✅ CI |
| macOS ARM64 | CPU + Metal | AppleClang | ✅ CI |
| iOS ARM64 | CPU | Xcode | ✅ CI |
| Android ARM64 | CPU | NDK r27c | ✅ CI |
| WebAssembly | CPU | Emscripten | ✅ CI |
| ROCm/HIP | CPU + GPU | ROCm 6.3 | ✅ CI |
| Linux x64 | CPU | GCC 13 / Clang 17 | [OK] CI |
| Linux x64 | CPU | Clang 17 (ASan+UBSan) | [OK] CI |
| Linux x64 | CPU | Clang 17 (TSan) | [OK] CI |
| Windows x64 | CPU | MSVC 2022 | [OK] CI |
| macOS ARM64 | CPU + Metal | AppleClang | [OK] CI |
| iOS ARM64 | CPU | Xcode | [OK] CI |
| Android ARM64 | CPU | NDK r27c | [OK] CI |
| WebAssembly | CPU | Emscripten | [OK] CI |
| ROCm/HIP | CPU + GPU | ROCm 6.3 | [OK] CI |
---
@ -821,13 +821,13 @@ libFuzzer harnesses cover core arithmetic (`cpu/fuzz/`):
| Target | Description |
|--------|-------------|
| `bench_comprehensive` | Full field/point/batch/signature suite |
| `bench_scalar_mul` | k×G and k×P with wNAF analysis |
| `bench_scalar_mul` | kxG and kxP with wNAF analysis |
| `bench_ct` | Fast-vs-CT overhead comparison |
| `bench_atomic_operations` | Individual ECC building block latencies |
| `bench_field_52` | 4×64 vs 5×52 field representation |
| `bench_ecdsa_multiscalar` | k₁×G + k₂×Q (Shamir vs separate) |
| `bench_field_52` | 4x64 vs 5x52 field representation |
| `bench_ecdsa_multiscalar` | k_1xG + k_2xQ (Shamir vs separate) |
| `bench_jsf_vs_shamir` | JSF vs Windowed Shamir comparison |
| `bench_adaptive_glv` | GLV window size sweep (8–20) |
| `bench_adaptive_glv` | GLV window size sweep (8-20) |
| `bench_comprehensive_riscv` | RISC-V optimized benchmark suite |
---
@ -860,8 +860,8 @@ sha256sum -c SHA256SUMS.txt
| Supply Chain | Status |
|-------------|--------|
| SHA256SUMS for all artifacts | ✅ Every release |
| SLSA Build Provenance (GitHub Attestation) | ✅ Every release |
| SHA256SUMS for all artifacts | [OK] Every release |
| SLSA Build Provenance (GitHub Attestation) | [OK] Every release |
| Reproducible builds documentation | 🔜 Planned |
| Cosign / Sigstore signing | 🔜 Planned |
@ -921,9 +921,9 @@ ctest --test-dir build/dev --output-on-failure
**GNU Affero General Public License v3.0 (AGPL-3.0)**
- ✅ Use, modify, and distribute under AGPL-3.0
- ✅ Must disclose source code
- ✅ Must provide network access to source if run as a service
- [OK] Use, modify, and distribute under AGPL-3.0
- [OK] Must disclose source code
- [OK] Must provide network access to source if run as a service
**Commercial License**: For proprietary use without AGPL obligations, contact [payysoon@gmail.com](mailto:payysoon@gmail.com).
@ -946,15 +946,15 @@ See [LICENSE](LICENSE) for full details.
## Acknowledgements
UltrafastSecp256k1 is an independent implementation — written from scratch with our own architecture, GPU pipeline, embedded ports, and optimization techniques. At the same time, no project exists in a vacuum. The published research, specifications, and open discussions from the wider cryptographic community helped us refine our own ideas and validate our results.
UltrafastSecp256k1 is an independent implementation -- written from scratch with our own architecture, GPU pipeline, embedded ports, and optimization techniques. At the same time, no project exists in a vacuum. The published research, specifications, and open discussions from the wider cryptographic community helped us refine our own ideas and validate our results.
We want to acknowledge the teams whose public work informed parts of our journey:
- **[bitcoin-core/secp256k1](https://github.com/bitcoin-core/secp256k1)** — The reference C library whose published research on constant-time field arithmetic and endomorphism-based scalar multiplication (GLV, Strauss, Pippenger) helped us benchmark and verify our own independent implementations on GPU and embedded targets.
- **[Bitcoin Core](https://github.com/bitcoin/bitcoin)** contributors — For open specifications (BIP-340 Schnorr, BIP-341 Taproot, RFC 6979) and a correctness-first engineering culture that benefits everyone building in this space.
- **Pieter Wuille, Jonas Nick, Tim Ruffing** and the libsecp256k1 maintainers — For publicly sharing their research on side-channel resistance, exhaustive testing, and field representation trade-offs. Their published findings helped us make better decisions when designing our own architecture.
- **[bitcoin-core/secp256k1](https://github.com/bitcoin-core/secp256k1)** -- The reference C library whose published research on constant-time field arithmetic and endomorphism-based scalar multiplication (GLV, Strauss, Pippenger) helped us benchmark and verify our own independent implementations on GPU and embedded targets.
- **[Bitcoin Core](https://github.com/bitcoin/bitcoin)** contributors -- For open specifications (BIP-340 Schnorr, BIP-341 Taproot, RFC 6979) and a correctness-first engineering culture that benefits everyone building in this space.
- **Pieter Wuille, Jonas Nick, Tim Ruffing** and the libsecp256k1 maintainers -- For publicly sharing their research on side-channel resistance, exhaustive testing, and field representation trade-offs. Their published findings helped us make better decisions when designing our own architecture.
We share our optimizations, GPU kernels, embedded ports, and cross-platform techniques freely — because open-source cryptography grows stronger when knowledge flows in every direction.
We share our optimizations, GPU kernels, embedded ports, and cross-platform techniques freely -- because open-source cryptography grows stronger when knowledge flows in every direction.
Special thanks to the [Stacker News](https://stacker.news) and [Delving Bitcoin](https://delvingbitcoin.org) communities for their early support and technical feedback.
@ -968,14 +968,14 @@ If you find **UltrafastSecp256k1** useful, consider supporting its development!
[![Donate with Bitcoin Lightning](https://img.shields.io/badge/Donate%20with-Lightning%20%E2%9A%A1-yellow?style=for-the-badge&logo=bitcoin)](https://stacker.news/shrec)
**Lightning Address:** `shrec@stacker.news` — send sats via any Lightning wallet or [stacker.news/shrec](https://stacker.news/shrec)
**Lightning Address:** `shrec@stacker.news` -- send sats via any Lightning wallet or [stacker.news/shrec](https://stacker.news/shrec)
[![Sponsor](https://img.shields.io/badge/Sponsor-GitHub%20Sponsors-ea4aaa.svg?logo=github)](https://github.com/sponsors/shrec)
[![PayPal](https://img.shields.io/badge/PayPal-Donate-blue.svg?logo=paypal)](https://paypal.me/IChkheidze)
---
**UltrafastSecp256k1** — The fastest open-source secp256k1 library. GPU-accelerated ECDSA & Schnorr signatures for Bitcoin, Ethereum, and 25+ blockchains. Zero dependencies. Constant-time layer. 12+ platforms.
**UltrafastSecp256k1** -- The fastest open-source secp256k1 library. GPU-accelerated ECDSA & Schnorr signatures for Bitcoin, Ethereum, and 25+ blockchains. Zero dependencies. Constant-time layer. 12+ platforms.
<!-- SEO keywords (not rendered by GitHub) -->
<!-- secp256k1 library fastest GPU CUDA OpenCL Metal ROCm ECDSA sign verify Schnorr BIP-340 Bitcoin Ethereum signature acceleration elliptic curve cryptography C++ C++20 high performance zero dependency batch verification constant time side channel resistance embedded ESP32 STM32 ARM Cortex-M RISC-V ARM64 WebAssembly WASM cross-platform multi-coin address generation BIP-32 BIP-44 HD wallet derivation key recovery EIP-155 RFC-6979 transaction signing blockchain cryptocurrency libsecp256k1 alternative NVIDIA AMD Apple Silicon MuSig2 FROST threshold signatures Taproot BIP-341 BIP-342 Pedersen commitments adaptor signatures ECDH key exchange secp256k1 GPU acceleration secp256k1 on embedded secp256k1 benchmarks secp256k1 constant time secp256k1 WASM secp256k1 C ABI FFI bindings Python Go Rust Java Node.js fastest secp256k1 implementation constant-time ECC library for RISC-V bitcoin cryptography optimization high-throughput elliptic curve signing secp256k1 RISC-V constant-time branchless cryptography GLV endomorphism Hamburg signed-digit comb Renes-Costello-Bathalter complete addition formulas dudect side-channel testing ASan UBSan TSan fuzzing libFuzzer valgrind memcheck security audit vulnerability scanning SLSA provenance supply chain security OpenSSF Scorecard CodeQL SonarCloud clang-tidy static analysis Docker container reproducible build Debian APT RPM Arch AUR Linux packaging AGPL-3.0 open source cryptographic library secp256k1 formal verification Fiat-Crypto Montgomery multiplication Barrett reduction BIP-327 multi-party computation MPC digital signatures public key cryptography PKI key agreement protocol -->

28
RELEASE_NOTES_v3.6.0.md
View File

@ -1,4 +1,4 @@
# UltrafastSecp256k1 v3.6.0 — GPU Signature Operations
# UltrafastSecp256k1 v3.6.0 -- GPU Signature Operations
## 🎯 Highlights
@ -19,19 +19,19 @@
| Operation | Time/Op | Throughput |
|-----------|---------|------------|
| Field Mul | 0.2 ns | 4,142 M/s |
| Scalar Mul (P×k) | 225.8 ns | 4.43 M/s |
| Generator Mul (G×k) | 217.7 ns | 4.59 M/s |
| Scalar Mul (Pxk) | 225.8 ns | 4.43 M/s |
| Generator Mul (Gxk) | 217.7 ns | 4.59 M/s |
## What's New
### GPU Signature Operations
- 6 new CUDA batch kernel wrappers (`__launch_bounds__(128, 2)`):
- `ecdsa_sign_batch_kernel` — RFC 6979 deterministic nonces, low-S normalization
- `ecdsa_verify_batch_kernel` — Shamir's trick + GLV endomorphism
- `ecdsa_sign_recoverable_batch_kernel` — with recovery ID
- `ecdsa_recover_batch_kernel` — public key recovery
- `schnorr_sign_batch_kernel` — BIP-340 with tagged hash midstates
- `schnorr_verify_batch_kernel` — x-only pubkey verification
- `ecdsa_sign_batch_kernel` -- RFC 6979 deterministic nonces, low-S normalization
- `ecdsa_verify_batch_kernel` -- Shamir's trick + GLV endomorphism
- `ecdsa_sign_recoverable_batch_kernel` -- with recovery ID
- `ecdsa_recover_batch_kernel` -- public key recovery
- `schnorr_sign_batch_kernel` -- BIP-340 with tagged hash midstates
- `schnorr_verify_batch_kernel` -- x-only pubkey verification
### Benchmarks
- 5 new GPU signature benchmarks in `bench_cuda.cu`
@ -53,11 +53,11 @@ Bitcoin, Ethereum, Litecoin, Dogecoin, Bitcoin Cash, Bitcoin SV, Zcash, Dash, Di
| Backend | Status |
|---------|--------|
| CUDA (NVIDIA) | ✅ Full signatures |
| OpenCL (NVIDIA/AMD) | ✅ Core ECC |
| Metal (Apple Silicon) | ✅ Core ECC |
| CPU (x86-64/ARM64/RISC-V) | ✅ Full signatures |
| WASM | ✅ Full signatures |
| CUDA (NVIDIA) | [OK] Full signatures |
| OpenCL (NVIDIA/AMD) | [OK] Core ECC |
| Metal (Apple Silicon) | [OK] Core ECC |
| CPU (x86-64/ARM64/RISC-V) | [OK] Full signatures |
| WASM | [OK] Full signatures |
## Build

2
RELEASE_NOTES_v3.7.0.md
View File

@ -3,7 +3,7 @@
### ufsecp Stable C ABI
- **45 exported C functions** with opaque `ufsecp_ctx` context
- Dual-layer constant-time protection (always-on)
- Single header: `ufsecp.h` — covers ECDSA, Schnorr, ECDH, BIP-32, addresses, WIF, taproot
- Single header: `ufsecp.h` -- covers ECDSA, Schnorr, ECDH, BIP-32, addresses, WIF, taproot
- Error codes 0-10 (`ufsecp_error_t`)
### 12 Language Bindings

48
RELEASE_v3.14.0.md
View File

@ -1,4 +1,4 @@
# UltrafastSecp256k1 v3.14.0 — Full Language Binding Coverage
# UltrafastSecp256k1 v3.14.0 -- Full Language Binding Coverage
**Release Date**: 2026-02-25
**Tag**: `v3.14.0`
@ -8,24 +8,24 @@
## Highlights
### 🔗 12 Language Bindings — Full 41-Function C API Parity
### 🔗 12 Language Bindings -- Full 41-Function C API Parity
All 12 officially supported language bindings now cover the complete `ufsecp` C API (41 exported functions):
| Language | New Functions | Status |
|----------|:---:|--------|
| **Java** | +22 JNI + 3 helper classes | ✅ Complete |
| **Swift** | +20 | ✅ Complete |
| **React Native** | +15 | ✅ Complete |
| **Python** | +3 | ✅ Complete |
| **Rust** | +2 | ✅ Complete |
| **Dart** | +1 | ✅ Complete |
| **Go** | — | ✅ Already complete |
| **Node.js** | — | ✅ Already complete |
| **C#** | — | ✅ Already complete |
| **Ruby** | — | ✅ Already complete |
| **PHP** | — | ✅ Already complete |
| **C API** | — | ✅ Reference implementation |
| **Java** | +22 JNI + 3 helper classes | [OK] Complete |
| **Swift** | +20 | [OK] Complete |
| **React Native** | +15 | [OK] Complete |
| **Python** | +3 | [OK] Complete |
| **Rust** | +2 | [OK] Complete |
| **Dart** | +1 | [OK] Complete |
| **Go** | -- | [OK] Already complete |
| **Node.js** | -- | [OK] Already complete |
| **C#** | -- | [OK] Already complete |
| **Ruby** | -- | [OK] Already complete |
| **PHP** | -- | [OK] Already complete |
| **C API** | -- | [OK] Reference implementation |
### Java Details
- 22 new JNI functions covering: DER encode/decode, recoverable signing, ECDH, Schnorr (BIP-340), BIP-32 HD derivation, BIP-39 mnemonic, taproot key generation, WIF encode/decode, address encoding, tagged hash
@ -38,7 +38,7 @@ All 12 officially supported language bindings now cover the complete `ufsecp` C
- 15 new functions bridged through the JS layer for mobile DApp development
### 📚 9 New Binding READMEs
Comprehensive documentation added for: `c_api`, `dart`, `go`, `java`, `php`, `python`, `ruby`, `rust`, `swift` — each with API reference, build instructions, and usage examples.
Comprehensive documentation added for: `c_api`, `dart`, `go`, `java`, `php`, `python`, `ruby`, `rust`, `swift` -- each with API reference, build instructions, and usage examples.
### 📦 Package Naming Cleanup
All documentation and packaging files now reference the correct library names:
@ -47,10 +47,10 @@ All documentation and packaging files now reference the correct library names:
- **Debian**: `libufsecp3` / `libufsecp-dev`
- **RPM**: `libufsecp` / `libufsecp-devel`
- **Arch**: `libufsecp`
- **CMake**: `find_package(secp256k1-fast)` → `secp256k1::fast`
- **pkg-config**: `pkg-config --libs secp256k1-fast` → `-lfastsecp256k1`
- **CMake**: `find_package(secp256k1-fast)` -> `secp256k1::fast`
- **pkg-config**: `pkg-config --libs secp256k1-fast` -> `-lfastsecp256k1`
### 🏗️ Selftest Report API (Foundation)
### 🏗 Selftest Report API (Foundation)
- `SelftestReport` and `SelftestCase` structs added to `selftest.hpp`
- `tally()` refactored for programmatic access to test results
- Function bodies (`selftest_report()`, `to_text()`, `to_json()`) planned for next release
@ -58,13 +58,13 @@ All documentation and packaging files now reference the correct library names:
---
## CI / Build Fixes
- `[[maybe_unused]]` on `get_platform_string()` — eliminates `-Werror=unused-function` in release builds
- `Dockerfile.local-ci` — `ubuntu:24.04` pinned by SHA digest (Scorecard compliance)
- `[[maybe_unused]]` on `get_platform_string()` -- eliminates `-Werror=unused-function` in release builds
- `Dockerfile.local-ci` -- `ubuntu:24.04` pinned by SHA digest (Scorecard compliance)
---
## Files Changed
- **38 files changed**, +1,579 insertions, −108 deletions
- **38 files changed**, +1,579 insertions, -108 deletions
- **22 binding files** modified/created
- **13 documentation/packaging files** corrected
@ -76,9 +76,9 @@ ctest --test-dir build_rel --output-on-failure
```
## Upgrade Notes
- **No breaking changes** — drop-in upgrade from v3.13.x
- **SOVERSION unchanged** — remains `3` (`libufsecp.so.3`)
- **ABI compatible** — no changes to C API function signatures
- **No breaking changes** -- drop-in upgrade from v3.13.x
- **SOVERSION unchanged** -- remains `3` (`libufsecp.so.3`)
- **ABI compatible** -- no changes to C API function signatures
- Binding code additions are pure additions; existing binding users unaffected
---

68
RISCV_OPTIMIZATIONS.md
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@ -11,12 +11,12 @@
| Phase | Scalar Mul | Field Mul | Key Change |
|-------|-----------|-----------|------------|
| Baseline (C++ only) | ~900 μs | ~300 ns | Portable C++ |
| + Assembly mul/square | 694 μs | 197 ns | Comba multiply + fast reduction |
| + Dedicated square asm | 672 μs | 197 ns | 10 mul vs 16 (symmetry exploit) |
| + Branchless field ops | 624 μs | 174 ns | ge/add/sub/normalize branchless |
| + Direct asm calls | 624 μs | 174 ns | Bypass FieldElement wrapper |
| + Branchless asm reduce | **621 μs** | **173 ns** | Remove beqz/j loop from reduce |
| Baseline (C++ only) | ~900 us | ~300 ns | Portable C++ |
| + Assembly mul/square | 694 us | 197 ns | Comba multiply + fast reduction |
| + Dedicated square asm | 672 us | 197 ns | 10 mul vs 16 (symmetry exploit) |
| + Branchless field ops | 624 us | 174 ns | ge/add/sub/normalize branchless |
| + Direct asm calls | 624 us | 174 ns | Bypass FieldElement wrapper |
| + Branchless asm reduce | **621 us** | **173 ns** | Remove beqz/j loop from reduce |
**Total improvement: ~31% scalar mul, ~42% field mul from baseline.**
@ -24,9 +24,9 @@
## 1. Assembly Multiply & Square (field_asm_riscv64.S)
### Comba Multiplication (16 → 16 mul)
### Comba Multiplication (16 -> 16 mul)
Standard 4-limb × 4-limb Comba multiplication producing 8-limb (512-bit) intermediate.
Standard 4-limb x 4-limb Comba multiplication producing 8-limb (512-bit) intermediate.
**Columns:**
```
@ -44,15 +44,15 @@ Uses `mul` / `mulhu` pairs with `sltu`-based carry propagation throughout.
### Dedicated Square (10 mul)
Exploits $a^2 = \sum a_i^2 + 2\sum_{i<j} a_i \cdot a_j$ symmetry:
- **4 diagonal:** `a0², a1², a2², a3²`
- **4 diagonal:** `a0^2, a1^2, a2^2, a3^2`
- **6 off-diagonal:** `a0*a1, a0*a2, a0*a3, a1*a2, a1*a3, a2*a3`
- Doubling via add-twice (no 128-bit shift carry complexity)
**Result:** Square 186 → 177 ns (**5% improvement**)
**Result:** Square 186 -> 177 ns (**5% improvement**)
### Fast Reduction (mod p = 2²⁵⁶ - 2³² - 977)
### Fast Reduction (mod p = 2^2⁵⁶ - 2^3^2 - 977)
Reduces [c0..c7] → [r0..r3] using $p = 2^{256} - C$ where $C = 2^{32} + 977$:
Reduces [c0..c7] -> [r0..r3] using $p = 2^{256} - C$ where $C = 2^{32} + 977$:
For each high limb $c_i$ ($i = 4..7$):
```
@ -68,12 +68,12 @@ After first-pass reduction, overflow `s9 < 2^34`. **Previous code** had a branch
```asm
# OLD (branchy):
.Lreduce_loop:
beqz s9, .Lfinal_check # ← branch
beqz s9, .Lfinal_check # <- branch
...reduce body...
j .Lreduce_loop # ← back-branch
j .Lreduce_loop # <- back-branch
```
**New code** executes reduce body unconditionally once (s9 → {0,1}), then merges residual into final check:
**New code** executes reduce body unconditionally once (s9 -> {0,1}), then merges residual into final check:
```asm
# NEW (branchless):
mv t4, s9 # always execute
@ -81,20 +81,20 @@ After first-pass reduction, overflow `s9 < 2^34`. **Previous code** had a branch
...reduce body... # s9 now 0 or 1
# Final: select reduced if overflow OR residual
or a7, a7, s9 # ← key line
or a7, a7, s9 # <- key line
neg a7, a7
# branchless XOR/AND/XOR select follows
```
**Mathematical proof:** After first-pass, $s9 < 2^{34}$. One pass of $s9 \times C$ where $C \approx 2^{32}$ produces at most $\sim 2^{66}$ which distributed across 4 limbs yields $s9' \in \{0, 1\}$. The final conditional subtract handles $s9' = 1$ via `or a7, a7, s9`.
**Result:** Mul 174 → 173 ns, Square 162 → 160 ns (deterministic timing, no branch variance)
**Result:** Mul 174 -> 173 ns, Square 162 -> 160 ns (deterministic timing, no branch variance)
---
## 2. Branchless C++ Field Operations (field.cpp)
### ge() — Greater-or-Equal Comparison
### ge() -- Greater-or-Equal Comparison
**Before:** Branchy for-loop with early return:
```cpp
@ -114,7 +114,7 @@ for (int i = 0; i < 4; ++i) {
return borrow == 0; // no borrow = a >= b
```
### add_impl — Field Addition
### add_impl -- Field Addition
**Before:** While-loop carry propagation + while-loop conditional reduction.
@ -138,7 +138,7 @@ for (int i = 0; i < 4; ++i)
out[i] ^= (out[i] ^ reduced[i]) & mask;
```
### sub_impl — Field Subtraction
### sub_impl -- Field Subtraction
**Before:** if-branch calling `ge()` then subtract or reverse-subtract.
@ -182,20 +182,20 @@ void mul_impl(const uint64_t* a, const uint64_t* b, uint64_t* out) {
}
```
Eliminates 2× `normalize()` + 2× `memcpy` per mul/square call.
Eliminates 2x `normalize()` + 2x `memcpy` per mul/square call.
---
## 4. wNAF Window Width (w=4 → w=5)
## 4. wNAF Window Width (w=4 -> w=5)
**File:** `cpu/src/point.cpp`
On RISC-V (not ESP32/STM32), scalar_mul uses wNAF with w=5:
- 16 precomputed points: [1P, 3P, 5P, ..., 31P]
- Fewer non-zero digits → fewer point additions in main loop
- Fewer non-zero digits -> fewer point additions in main loop
- Trade-off: 8 extra precomputed points (8 doublings + 8 additions) vs ~10% fewer additions in 256-bit scan
**Result:** Scalar Mul 678 → 672 μs (**~1% improvement**)
**Result:** Scalar Mul 678 -> 672 us (**~1% improvement**)
---
@ -205,7 +205,7 @@ On RISC-V (not ESP32/STM32), scalar_mul uses wNAF with w=5:
Wrote `field_add_asm_riscv64` and `field_sub_asm_riscv64` in assembly, wired via `#elif defined(SECP256K1_HAS_RISCV_ASM)` in field.cpp.
**Result:** **Regression.** Field Add: 34 → 43 ns (+26%), Field Sub: 31 → 51 ns (+64%).
**Result:** **Regression.** Field Add: 34 -> 43 ns (+26%), Field Sub: 31 -> 51 ns (+64%).
**Root Cause:** Clang 21 generates better code for simple 256-bit add/sub on U74's in-order pipeline. The compiler:
- Optimally schedules instructions to fill pipeline bubbles
@ -218,15 +218,15 @@ Wrote `field_add_asm_riscv64` and `field_sub_asm_riscv64` in assembly, wired via
## Key Learnings
1. **Assembly wrapper overhead matters:** For ~30ns operations, converting between `limbs4` ↔ `FieldElement` costs more than the operation itself.
1. **Assembly wrapper overhead matters:** For ~30ns operations, converting between `limbs4` <-> `FieldElement` costs more than the operation itself.
2. **Branchless > branchy on in-order cores:** U74 has no speculative execution — branch misprediction flushes the entire pipeline. Even well-predicted branches add 1-2 cycles of overhead.
2. **Branchless > branchy on in-order cores:** U74 has no speculative execution -- branch misprediction flushes the entire pipeline. Even well-predicted branches add 1-2 cycles of overhead.
3. **Compiler wins for simple ops:** Clang 21 with `-Ofast` generates near-optimal code for add/sub. Only complex mul/square with carry chains benefit from hand-tuned assembly.
4. **Single-pass reduction is sufficient:** After first-pass, overflow is bounded by $2^{34}$. One unconditional pass always reduces to {0,1}. No loop needed.
5. **Binary GCD beats Fermat:** `hybrid_eea` inverse (18 μs) is 3× faster than addition chain methods (~60 μs) on RISC-V.
5. **Binary GCD beats Fermat:** `hybrid_eea` inverse (18 us) is 3x faster than addition chain methods (~60 us) on RISC-V.
---
@ -238,15 +238,15 @@ Wrote `field_add_asm_riscv64` and `field_sub_asm_riscv64` in assembly, wired via
| Field Square | 160 ns | RISC-V asm (10 mul + branchless reduce) |
| Field Add | 38 ns | C++ branchless (compiler-optimized) |
| Field Sub | 34 ns | C++ branchless (compiler-optimized) |
| Field Inverse | 17 μs | Binary GCD (hybrid_eea) |
| Point Add | 3 μs | Jacobian mixed addition (7M + 4S) |
| Point Double | 1 μs | Jacobian doubling (4S + 4M, a=0) |
| **Scalar Mul** | **621 μs** | **GLV + Shamir + wNAF(w=5)** |
| **Generator Mul** | **37 μs** | **Precomputed fixed-base table** |
| Field Inverse | 17 us | Binary GCD (hybrid_eea) |
| Point Add | 3 us | Jacobian mixed addition (7M + 4S) |
| Point Double | 1 us | Jacobian doubling (4S + 4M, a=0) |
| **Scalar Mul** | **621 us** | **GLV + Shamir + wNAF(w=5)** |
| **Generator Mul** | **37 us** | **Precomputed fixed-base table** |
| Batch Inv (n=100) | 695 ns | Montgomery's trick |
| Batch Inv (n=1000) | 547 ns | Montgomery's trick |
All 29+ tests pass ✅
All 29+ tests pass [OK]
---

28
ROADMAP.md
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@ -1,21 +1,21 @@
# UltrafastSecp256k1 — Project Roadmap
# UltrafastSecp256k1 -- Project Roadmap
> Last updated: 2026-02-24
> Covers: March 2026 – February 2027
> Covers: March 2026 - February 2027
This roadmap describes what the project intends to do — and explicitly not do — over the next 12 months. It is organized into three phases.
This roadmap describes what the project intends to do -- and explicitly not do -- over the next 12 months. It is organized into three phases.
---
## Phase I: Core Assurance (Q1–Q2 2026)
## Phase I: Core Assurance (Q1-Q2 2026)
**Goal**: Strengthen correctness guarantees and testing infrastructure.
### Will Do
- **Differential testing**: In-process harness comparing UltrafastSecp256k1 against libsecp256k1 (FetchContent linking, CI PR runs with ≥10k random cases)
- **Differential testing**: In-process harness comparing UltrafastSecp256k1 against libsecp256k1 (FetchContent linking, CI PR runs with >=10k random cases)
- **Standard test vectors**: Complete BIP-340 (27/27 done), RFC 6979 (35/35 done), BIP-32 vector coverage verification
- **Property-based testing**: Formalized algebraic invariants — associativity, distributivity, identity, inverse, double-and-add, GLV reconstruction (89/89 done)
- **Property-based testing**: Formalized algebraic invariants -- associativity, distributivity, identity, inverse, double-and-add, GLV reconstruction (89/89 done)
- **CT leakage testing**: dudect integrated into CI (smoke mode per PR, nightly full statistical runs)
- **Normalization spec**: Document low-S normalization and DER strictness guarantees
- **FAST-mode guardrails**: Compile-time or runtime assert preventing use of non-CT paths for signing
@ -28,7 +28,7 @@ This roadmap describes what the project intends to do — and explicitly not do
---
## Phase II: Protocol & Production Hardening (Q3–Q4 2026)
## Phase II: Protocol & Production Hardening (Q3-Q4 2026)
**Goal**: Harden advanced protocols, expand fuzzing, prepare for production deployments.
@ -66,20 +66,20 @@ This roadmap describes what the project intends to do — and explicitly not do
### Won't Do (Phase III)
- Formal verification (out of scope for this cycle; may be explored in future)
- Custom hardware acceleration (FPGA/ASIC — out of scope)
- Custom hardware acceleration (FPGA/ASIC -- out of scope)
- Non-secp256k1 curves (project scope is secp256k1 only)
---
## Explicit Non-Goals (Next 12 Months)
These items are **intentionally out of scope** for the 2026–2027 roadmap:
These items are **intentionally out of scope** for the 2026-2027 roadmap:
- **Formal verification** (e.g., Coq/Lean proofs) — prohibitive effort for current team size
- **Non-secp256k1 curves** (ed25519, P-256, etc.) — outside project scope
- **FIPS 140-3 certification** — requires organizational infrastructure beyond current capacity
- **Custom FPGA/ASIC implementations** — hardware projects are out of scope
- **GUI applications** — the project is a library, not an end-user application
- **Formal verification** (e.g., Coq/Lean proofs) -- prohibitive effort for current team size
- **Non-secp256k1 curves** (ed25519, P-256, etc.) -- outside project scope
- **FIPS 140-3 certification** -- requires organizational infrastructure beyond current capacity
- **Custom FPGA/ASIC implementations** -- hardware projects are out of scope
- **GUI applications** -- the project is a library, not an end-user application
---

72
SECURITY.md
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@ -4,10 +4,10 @@
| Version | Supported |
|---------|-----------|
| 3.12.x | ✅ Active |
| 3.11.x | ⚠️ Critical fixes only |
| 3.9.x–3.10.x | ⚠️ Critical fixes only |
| < 3.9 | ❌ Unsupported |
| 3.12.x | [OK] Active |
| 3.11.x | [!] Critical fixes only |
| 3.9.x-3.10.x | [!] Critical fixes only |
| < 3.9 | [FAIL] Unsupported |
Security fixes apply to the latest release on the `main` branch.
@ -53,33 +53,33 @@ For auditors and security researchers, the following documents are available:
| Document | Purpose |
|----------|---------|
| [AUDIT_GUIDE.md](AUDIT_GUIDE.md) | **Start here** — Auditor navigation, checklist, reproduction commands |
| [AUDIT_GUIDE.md](AUDIT_GUIDE.md) | **Start here** -- Auditor navigation, checklist, reproduction commands |
| [AUDIT_REPORT.md](AUDIT_REPORT.md) | Internal audit: 641,194 checks, 8 suites, 0 failures |
| [THREAT_MODEL.md](THREAT_MODEL.md) | Layer-by-layer risk + attack surface analysis |
| [docs/ARCHITECTURE.md](docs/ARCHITECTURE.md) | Technical architecture for auditors |
| [docs/CT_VERIFICATION.md](docs/CT_VERIFICATION.md) | Constant-time methodology, dudect, known limitations |
| [docs/TEST_MATRIX.md](docs/TEST_MATRIX.md) | Function → test coverage map with gap analysis |
| [docs/TEST_MATRIX.md](docs/TEST_MATRIX.md) | Function -> test coverage map with gap analysis |
### Automated Security Measures
The following automated security measures are in place:
- **CodeQL** — static analysis on every push/PR (C/C++ security-and-quality queries)
- **OpenSSF Scorecard** — weekly supply-chain security assessment
- **Security Audit CI** — `-Werror -Wall -Wextra -Wpedantic -Wconversion -Wshadow` build, ASan+UBSan test suite, Valgrind memcheck (weekly + on push)
- **Clang-Tidy** — 30+ static analysis checks (bugprone, cert, performance, readability, clang-analyzer) on every push/PR
- **SonarCloud** — continuous code quality and security hotspot analysis
- **ASan + UBSan** — address/undefined-behavior sanitizers in CI
- **TSan** — thread sanitizer in CI
- **Valgrind Memcheck** — memory error detection in Security Audit workflow
- **Artifact Attestation** — SLSA provenance for all release artifacts
- **SHA-256 Checksums** — `SHA256SUMS.txt` ships with every release
- **Dependabot** — automated dependency updates for all ecosystems
- **Dependency Review** — PR-level vulnerable dependency scanning
- **libFuzzer harnesses** — continuous fuzz testing of field/scalar/point layers
- **Docker SHA-pinned images** — reproducible builds with digest-pinned base images
- **dudect timing analysis** — Welch t-test side-channel detection (1300+ line test suite)
- **Internal audit suite** — 641,194 checks across 8 dedicated audit test suites
- **CodeQL** -- static analysis on every push/PR (C/C++ security-and-quality queries)
- **OpenSSF Scorecard** -- weekly supply-chain security assessment
- **Security Audit CI** -- `-Werror -Wall -Wextra -Wpedantic -Wconversion -Wshadow` build, ASan+UBSan test suite, Valgrind memcheck (weekly + on push)
- **Clang-Tidy** -- 30+ static analysis checks (bugprone, cert, performance, readability, clang-analyzer) on every push/PR
- **SonarCloud** -- continuous code quality and security hotspot analysis
- **ASan + UBSan** -- address/undefined-behavior sanitizers in CI
- **TSan** -- thread sanitizer in CI
- **Valgrind Memcheck** -- memory error detection in Security Audit workflow
- **Artifact Attestation** -- SLSA provenance for all release artifacts
- **SHA-256 Checksums** -- `SHA256SUMS.txt` ships with every release
- **Dependabot** -- automated dependency updates for all ecosystems
- **Dependency Review** -- PR-level vulnerable dependency scanning
- **libFuzzer harnesses** -- continuous fuzz testing of field/scalar/point layers
- **Docker SHA-pinned images** -- reproducible builds with digest-pinned base images
- **dudect timing analysis** -- Welch t-test side-channel detection (1300+ line test suite)
- **Internal audit suite** -- 641,194 checks across 8 dedicated audit test suites
### Planned Security Improvements
@ -87,7 +87,7 @@ The following automated security measures are in place:
- [ ] Formal verification of field/scalar arithmetic (Fiat-Crypto / Cryptol)
- [ ] ct-verif LLVM pass integration for compile-time CT verification
- [ ] Hardware timing analysis on multiple CPU microarchitectures
- [ ] Multi-µarch dudect campaign (Intel, AMD, ARM, Apple Silicon)
- [ ] Multi-uarch dudect campaign (Intel, AMD, ARM, Apple Silicon)
- [ ] FROST / MuSig2 protocol-level test vectors from reference implementations
- [ ] Cross-ABI / FFI correctness tests across calling conventions
@ -106,7 +106,7 @@ See [THREAT_MODEL.md](THREAT_MODEL.md) for a layer-by-layer risk assessment.
| Point operations (add, dbl, mul) | Stable | Deterministic selftest (smoke/ci/stress) |
| ECDSA (RFC 6979) | Stable | Deterministic nonces, input validation |
| Schnorr (BIP-340) | Stable | Tagged hashing, input validation |
| Constant-time layer (`ct::`) | Stable | No secret-dependent branches; ~5–7× penalty |
| Constant-time layer (`ct::`) | Stable | No secret-dependent branches; ~5-7x penalty |
| Batch inverse / multi-scalar | Stable | Sweep-tested up to 8192 elements |
| GPU backends (CUDA, ROCm, OpenCL, Metal) | Beta | Functional, not constant-time |
| MuSig2 / FROST / Adaptor | Experimental | API may change |
@ -123,11 +123,11 @@ See [THREAT_MODEL.md](THREAT_MODEL.md) for a layer-by-layer risk assessment.
The constant-time layer (`ct::` namespace) provides:
- `ct::field_mul`, `ct::field_inv` — timing-safe field arithmetic
- `ct::scalar_mul` — timing-safe scalar multiplication
- `ct::point_add_complete`, `ct::point_dbl` — complete addition formulas
- `ct::field_mul`, `ct::field_inv` -- timing-safe field arithmetic
- `ct::scalar_mul` -- timing-safe scalar multiplication
- `ct::point_add_complete`, `ct::point_dbl` -- complete addition formulas
The CT layer uses no secret-dependent branches or memory access patterns. It carries a ~5–7× performance penalty relative to the optimized (variable-time) path.
The CT layer uses no secret-dependent branches or memory access patterns. It carries a ~5-7x performance penalty relative to the optimized (variable-time) path.
**Important**: The default (non-CT) operations prioritize performance and are NOT constant-time. Use the `ct::` variants when processing secret keys or nonces.
@ -201,10 +201,10 @@ We follow a **coordinated disclosure** process:
| Phase | Timeline | Action |
|-------|----------|--------|
| Acknowledgment | ≤ 72 hours | Confirm receipt, assign tracking ID |
| Assessment | ≤ 7 days | Severity classification (CVSS 3.1) |
| Fix development | ≤ 30 days | Patch + test for confirmed issues |
| Advisory | ≤ 90 days | GitHub Security Advisory published |
| Acknowledgment | <= 72 hours | Confirm receipt, assign tracking ID |
| Assessment | <= 7 days | Severity classification (CVSS 3.1) |
| Fix development | <= 30 days | Patch + test for confirmed issues |
| Advisory | <= 90 days | GitHub Security Advisory published |
| Credit | At advisory | Reporter credited (unless anonymous) |
### Severity Guidelines
@ -212,9 +212,9 @@ We follow a **coordinated disclosure** process:
| CVSS | Example |
|------|---------|
| Critical (9.0+) | Private key recovery, signature forgery |
| High (7.0–8.9) | CT violation in `ct::` namespace, nonce bias |
| Medium (4.0–6.9) | Denial of service, unexpected panic/abort |
| Low (0.1–3.9) | Non-security correctness issues, edge-case handling |
| High (7.0-8.9) | CT violation in `ct::` namespace, nonce bias |
| Medium (4.0-6.9) | Denial of service, unexpected panic/abort |
| Low (0.1-3.9) | Non-security correctness issues, edge-case handling |
### Bug Bounty
@ -233,4 +233,4 @@ We appreciate responsible disclosure. Contributors who report valid security iss
---
*UltrafastSecp256k1 v3.14.0 — Security Policy*
*UltrafastSecp256k1 v3.14.0 -- Security Policy*

80
THREAT_MODEL.md
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@ -1,29 +1,29 @@
# Threat Model
UltrafastSecp256k1 v3.12.1 — Layer-by-Layer Risk Assessment
UltrafastSecp256k1 v3.12.1 -- Layer-by-Layer Risk Assessment
---
## Architecture Overview
```
┌─────────────────────────────────────────────────────────────────┐
│ Application Layer │
│ (Wallet, Signer, Verifier, Key Manager, Address Generator) │
├──────────────┬───────────────┬───────────────────┬──────────────┤
│ Coins (27) │ HD (BIP-32) │ Taproot/MuSig2 │ FROST/Adaptor│
├──────────────┴───────────────┴───────────────────┴──────────────┤
│ ECDSA (RFC 6979) │ Schnorr (BIP-340) │ Pedersen │
├─────────────────────────────────────────────────────────────────┤
│ FAST (variable-time) │ CT (constant-time) │
│ secp256k1::fast:: │ secp256k1::ct:: │
├─────────────────────────────────────────────────────────────────┤
│ Field / Scalar / Point core (4×64 limbs) │
├─────────────────────────────────────────────────────────────────┤
│ CPU (x64 BMI2/ADX, ARM64, RISC-V, Xtensa, Cortex-M3) │
│ GPU (CUDA PTX, ROCm/HIP, OpenCL 3.0, Metal) │
│ WASM (Emscripten) │
└─────────────────────────────────────────────────────────────────┘
+-----------------------------------------------------------------+
| Application Layer |
| (Wallet, Signer, Verifier, Key Manager, Address Generator) |
+--------------+---------------+-------------------+--------------+
| Coins (27) | HD (BIP-32) | Taproot/MuSig2 | FROST/Adaptor|
+--------------+---------------+-------------------+--------------+
| ECDSA (RFC 6979) | Schnorr (BIP-340) | Pedersen |
+-----------------------------------------------------------------+
| FAST (variable-time) | CT (constant-time) |
| secp256k1::fast:: | secp256k1::ct:: |
+-----------------------------------------------------------------+
| Field / Scalar / Point core (4x64 limbs) |
+-----------------------------------------------------------------+
| CPU (x64 BMI2/ADX, ARM64, RISC-V, Xtensa, Cortex-M3) |
| GPU (CUDA PTX, ROCm/HIP, OpenCL 3.0, Metal) |
| WASM (Emscripten) |
+-----------------------------------------------------------------+
```
> See [docs/ARCHITECTURE.md](docs/ARCHITECTURE.md) for detailed technical architecture.
@ -55,11 +55,11 @@ Variable-time algorithms may leak information about operands through timing, cac
|----------|-------|
| Constant-time | Yes (no secret-dependent branches or memory access) |
| Secret key handling | Designed for this |
| Performance penalty | ~5–7× vs FAST |
| Performance penalty | ~5-7x vs FAST |
| Threat | Compiler optimization may break CT guarantees |
| Mitigation | Sanitizer builds (ASan, TSan), manual inspection, `-O2` only |
The CT layer provides complete addition formulas, constant-time field inversion, and timing-safe scalar multiplication. Callers must still zero sensitive buffers after use — the library does not manage key lifetimes.
The CT layer provides complete addition formulas, constant-time field inversion, and timing-safe scalar multiplication. Callers must still zero sensitive buffers after use -- the library does not manage key lifetimes.
**Known limitation**: No formal verification (e.g., ct-verif, Vale) has been applied. CT guarantees rely on code review and compiler discipline.
@ -85,7 +85,7 @@ GPU kernels are variable-time by design. Device memory is not zeroed. Do not pas
|----------|-------|
| Nonce generation | Deterministic (RFC 6979 for ECDSA) |
| Input validation | Point-on-curve, scalar range checks |
| Threat | Nonce reuse → private key recovery |
| Threat | Nonce reuse -> private key recovery |
| Mitigation | RFC 6979 eliminates random nonce dependency |
MuSig2, FROST, and Adaptor Signatures are **experimental**. Their APIs may change and they have not been independently reviewed.
@ -99,7 +99,7 @@ MuSig2, FROST, and Adaptor Signatures are **experimental**. Their APIs may chang
| Key derivation | BIP-32 (hardened + normal) |
| Address generation | Coin-specific encoding (Base58, Bech32, etc.) |
| Secret handling | Derived keys are secret; use CT layer for signing |
| Threat | Incorrect derivation path → wrong keys |
| Threat | Incorrect derivation path -> wrong keys |
| Mitigation | Test vectors from BIP-32/44 specifications |
The coin dispatch layer generates addresses only. It does **not** store keys, manage UTXOs, or broadcast transactions.
@ -111,7 +111,7 @@ The coin dispatch layer generates addresses only. It does **not** store keys, ma
| Property | Value |
|----------|-------|
| Allocation | Zero heap allocation (scratchpad model) |
| Threat | Incorrect batch inverse → silent wrong results |
| Threat | Incorrect batch inverse -> silent wrong results |
| Mitigation | Sweep-tested up to 8192; boundary KAT vectors; fuzz harness |
---
@ -120,17 +120,17 @@ The coin dispatch layer generates addresses only. It does **not** store keys, ma
```
TRUSTED (this library controls):
├─ Arithmetic correctness (field, scalar, point)
├─ CT layer timing properties
├─ Deterministic nonce generation
└─ Input validation (on-curve, range)
+- Arithmetic correctness (field, scalar, point)
+- CT layer timing properties
+- Deterministic nonce generation
+- Input validation (on-curve, range)
NOT TRUSTED (caller responsibility):
├─ Key storage and lifecycle
├─ Buffer zeroing after use
├─ Choosing FAST vs CT appropriately
├─ Network security / transport
└─ Entropy source (if any randomness needed)
+- Key storage and lifecycle
+- Buffer zeroing after use
+- Choosing FAST vs CT appropriately
+- Network security / transport
+- Entropy source (if any randomness needed)
```
---
@ -157,16 +157,16 @@ NOT TRUSTED (caller responsibility):
| Compiler-introduced branches | MEDIUM | `asm volatile` barriers, `-O2` recommended |
| Microarchitecture-specific timing | LOW | dudect testing on x86-64, ARM64 |
**Testing**: `tests/test_ct_sidechannel.cpp` — dudect Welch t-test, |t| < 4.5
**Testing**: `tests/test_ct_sidechannel.cpp` -- dudect Welch t-test, |t| < 4.5
### A2: Nonce Attacks
| Vector | Risk | Mitigation |
|--------|------|------------|
| ECDSA random nonce reuse → key recovery | CRITICAL | RFC 6979 deterministic nonces (no randomness needed) |
| Biased nonces → lattice attack | HIGH | RFC 6979 provides uniform distribution |
| ECDSA random nonce reuse -> key recovery | CRITICAL | RFC 6979 deterministic nonces (no randomness needed) |
| Biased nonces -> lattice attack | HIGH | RFC 6979 provides uniform distribution |
| Schnorr nonce bias | HIGH | BIP-340 tagged hash nonce derivation |
| FROST nonce mishandling | MEDIUM | Experimental — under review |
| FROST nonce mishandling | MEDIUM | Experimental -- under review |
### A3: Arithmetic Errors
@ -174,7 +174,7 @@ NOT TRUSTED (caller responsibility):
|--------|------|------------|
| Incorrect field reduction | CRITICAL | 641,194 audit checks, fuzz testing |
| Point addition edge cases (P+P, P+O, P+(-P)) | CRITICAL | Complete addition formulas in CT, sweep tests |
| GLV decomposition error | HIGH | Reconstruction test: k1+k2·λ ≡ k for random k |
| GLV decomposition error | HIGH | Reconstruction test: k1+k2*lambda == k for random k |
| SafeGCD inverse error | HIGH | Cross-checked against Fermat chain |
| Batch inverse corrupting elements | MEDIUM | Sweep-tested up to 8192 elements |
@ -214,9 +214,9 @@ NOT TRUSTED (caller responsibility):
3. **Build with sanitizers** regularly (`cpu-asan`, `cpu-tsan` presets)
4. **Run selftest on startup** (`Selftest(false, SelftestMode::smoke)`)
5. **Do not expose GPU memory** to untrusted contexts
6. **Pin your dependency version** — API may change before v4.0
6. **Pin your dependency version** -- API may change before v4.0
7. **Review CT_VERIFICATION.md** for known constant-time limitations
8. **Use `-O2` for production CT builds** — higher levels may break CT properties
8. **Use `-O2` for production CT builds** -- higher levels may break CT properties
9. **Run dudect test** on your target hardware before deployment
---
@ -253,4 +253,4 @@ NOT TRUSTED (caller responsibility):
---
*UltrafastSecp256k1 v3.12.1 — Threat Model*
*UltrafastSecp256k1 v3.12.1 -- Threat Model*

2
android/CMakeLists.txt
View File

@ -1,5 +1,5 @@
# ============================================================================
# UltrafastSecp256k1 — Android Native Library Build
# UltrafastSecp256k1 -- Android Native Library Build
# ============================================================================
# Usage (from this directory):
# cmake -S . -B build-android-arm64 \

34
android/README.md
View File

@ -1,4 +1,4 @@
# UltrafastSecp256k1 — Android Port
# UltrafastSecp256k1 -- Android Port
Full CPU port of UltrafastSecp256k1 for Android (ARM64, ARMv7, x86_64, x86).
@ -19,10 +19,10 @@ export ANDROID_NDK_HOME=/path/to/android-ndk-r26c
```
output/jniLibs/
├── arm64-v8a/libsecp256k1_jni.so
├── armeabi-v7a/libsecp256k1_jni.so
├── x86_64/libsecp256k1_jni.so
└── x86/libsecp256k1_jni.so
+-- arm64-v8a/libsecp256k1_jni.so
+-- armeabi-v7a/libsecp256k1_jni.so
+-- x86_64/libsecp256k1_jni.so
+-- x86/libsecp256k1_jni.so
```
## Usage (Kotlin)
@ -33,7 +33,7 @@ import com.secp256k1.native.Secp256k1
// Initialize once
Secp256k1.init()
// Key generation (constant-time — side-channel safe)
// Key generation (constant-time -- side-channel safe)
val pubkey = Secp256k1.ctScalarMulGenerator(privkeyBytes)
// ECDH (constant-time)
@ -48,12 +48,12 @@ val sum = Secp256k1.pointAdd(p1, p2)
```
android/
├── CMakeLists.txt — Android CMake build
├── build_android.sh — Linux/macOS build script
├── build_android.ps1 — Windows build script
├── jni/secp256k1_jni.cpp — JNI bridge (C++ ↔ Java/Kotlin)
├── kotlin/.../Secp256k1.kt — Kotlin wrapper
└── example/ — Example Android app
+-- CMakeLists.txt -- Android CMake build
+-- build_android.sh -- Linux/macOS build script
+-- build_android.ps1 -- Windows build script
+-- jni/secp256k1_jni.cpp -- JNI bridge (C++ <-> Java/Kotlin)
+-- kotlin/.../Secp256k1.kt -- Kotlin wrapper
+-- example/ -- Example Android app
```
See [Android Guide](../docs/wiki/Android-Guide.md) for full documentation.
@ -63,13 +63,13 @@ See [Android Guide](../docs/wiki/Android-Guide.md) for full documentation.
| Operation | Time |
|-----------|------|
| field_mul (a*b mod p) | 85 ns |
| field_sqr (a² mod p) | 66 ns |
| field_sqr (a^2 mod p) | 66 ns |
| field_add (a+b mod p) | 18 ns |
| field_sub (a-b mod p) | 16 ns |
| field_inverse | 2,621 ns |
| **fast scalar_mul (k*G)** | **7.6 μs** |
| fast scalar_mul (k*P) | 77.6 μs |
| CT scalar_mul (k*G) | 545 μs |
| ECDH (full CT) | 545 μs |
| **fast scalar_mul (k*G)** | **7.6 us** |
| fast scalar_mul (k*P) | 77.6 us |
| CT scalar_mul (k*G) | 545 us |
| ECDH (full CT) | 545 us |
Backend: ARM64 inline assembly (MUL/UMULH). ~5x faster than generic C++.

2
android/build_android.ps1
View File

@ -1,5 +1,5 @@
# ============================================================================
# UltrafastSecp256k1 — Android Build Script (PowerShell)
# UltrafastSecp256k1 -- Android Build Script (PowerShell)
# ============================================================================
# Windows variant for building Android native libraries.
#

4
android/build_android.sh
View File

@ -1,6 +1,6 @@
#!/bin/bash
# ============================================================================
# UltrafastSecp256k1 — Android Build Script
# UltrafastSecp256k1 -- Android Build Script
# ============================================================================
# Builds native libraries for all Android ABIs using the Android NDK.
#
@ -99,7 +99,7 @@ for ABI in "${ABIS[@]}"; do
cp "$JNI_SO" "$ABI_OUT/"
echo " $ABI: $(du -h "$ABI_OUT/libsecp256k1_jni.so" | cut -f1)"
else
echo " $ABI: WARNING — libsecp256k1_jni.so not found"
echo " $ABI: WARNING -- libsecp256k1_jni.so not found"
fi
done

120
audit/AUDIT_TEST_PLAN.md
View File

@ -1,4 +1,4 @@
# Audit Test Plan — UltrafastSecp256k1 v3.14.0
# Audit Test Plan -- UltrafastSecp256k1 v3.14.0
> **Single source of truth** for what the audit tests, how it tests, and where evidence lives.
@ -22,7 +22,7 @@ Output: `audit-output-<timestamp>/audit_report.md` + `artifacts/`
---
## Category → Test → Evidence Map
## Category -> Test -> Evidence Map
### A. Environment & Build Integrity
@ -50,7 +50,7 @@ Output: `audit-output-<timestamp>/audit_report.md` + `artifacts/`
| C.2 | cppcheck | `run_full_audit` (secondary signal) | `artifacts/static_analysis/cppcheck.log` |
| C.3 | CodeQL | GitHub Actions CI (`codeql-analysis.yml`) | GitHub Security tab |
| C.4 | SonarCloud | `sonar-project.properties` + CI | SonarCloud dashboard |
| C.5 | Include-what-you-use | Optional, manual | — |
| C.5 | Include-what-you-use | Optional, manual | -- |
| C.6 | Dangerous patterns scan | grep-based scan for hot-path violations | `artifacts/static_analysis/dangerous_patterns.log` |
### D. Sanitizers (Memory/UB/Threads)
@ -63,16 +63,16 @@ Output: `audit-output-<timestamp>/audit_report.md` + `artifacts/`
| D.4 | LeakSanitizer | Included with ASan (`detect_leaks=1`) | `artifacts/sanitizers/asan_ubsan.log` |
| D.5 | Valgrind memcheck | `scripts/valgrind_ct_check.sh` / `run_full_audit.sh` | `artifacts/sanitizers/valgrind.log` |
### E. Unit Tests (KAT — Known Answer Tests)
### E. Unit Tests (KAT -- Known Answer Tests)
| # | Test | Implementation (unified runner module) | CTest target |
|---|------|----------------------------------------|-------------|
| E.1a | Field/scalar/point KAT | `audit_field`, `audit_scalar`, `audit_point`, `mul`, `arith_correct` | `debug_invariants`, `carry_propagation` |
| E.1b | ECDSA RFC6979 vectors | `rfc6979_vectors` | `fiat_crypto_vectors` |
| E.1c | Schnorr BIP-340 vectors | `bip340_vectors` | `cross_platform_kat` |
| E.1d | BIP-32 vectors TV1–TV5 | `bip32_vectors` | `cross_platform_kat` |
| E.1e | Address encoding vectors | `coins` | — |
| E.2 | Serialization roundtrips | `comprehensive`, `ecdsa_schnorr` | — |
| E.1d | BIP-32 vectors TV1-TV5 | `bip32_vectors` | `cross_platform_kat` |
| E.1e | Address encoding vectors | `coins` | -- |
| E.2 | Serialization roundtrips | `comprehensive`, `ecdsa_schnorr` | -- |
| E.3 | Error-path tests | `audit_fuzz`, `fault_injection`, `fuzz_parsers` | `audit_fuzz`, `fault_injection` |
| E.4 | Boundary tests (0, 1, n-1, p, etc.) | `exhaustive`, `ecc_properties`, `audit_field`, `audit_scalar` | `carry_propagation` |
@ -84,8 +84,8 @@ Output: `audit-output-<timestamp>/audit_report.md` + `artifacts/`
| F.2 | Scalar/field ring: distributive, inverse | `audit_field`, `audit_scalar`, `arith_correct` |
| F.3 | GLV decomposition correctness | `audit_scalar` (GLV edge cases) |
| F.4 | Batch inversion correctness | `audit_field` (batch inverse sweep) |
| F.5 | Jacobian↔Affine roundtrip | `audit_point`, `batch_add` |
| F.6 | FAST≡CT equivalence | `ct_equivalence`, `diag_scalar_mul` |
| F.5 | Jacobian<->Affine roundtrip | `audit_point`, `batch_add` |
| F.6 | FAST==CT equivalence | `ct_equivalence`, `diag_scalar_mul` |
> **Seed**: All property tests use deterministic seed. Seed is printed in unified runner output and recorded in `audit_report.json`.
@ -93,7 +93,7 @@ Output: `audit-output-<timestamp>/audit_report.md` + `artifacts/`
| # | Test | Implementation | CTest target |
|---|------|---------------|-------------|
| G.1 | Internal differential (5×52 vs 10×26 vs 4×64) | `field_52`, `field_26`, `differential` | `differential` |
| G.1 | Internal differential (5x52 vs 10x26 vs 4x64) | `field_52`, `field_26`, `differential` | `differential` |
| G.2 | Cross-library vs bitcoin-core/libsecp256k1 | `test_cross_libsecp256k1.cpp` | `cross_libsecp256k1` (requires `-DSECP256K1_BUILD_CROSS_TESTS=ON`) |
| G.3 | Fiat-Crypto reference vectors | `fiat_crypto` | `fiat_crypto_vectors` |
| G.4 | Cross-platform KAT | `cross_platform_kat` | `cross_platform_kat` |
@ -108,7 +108,7 @@ Output: `audit-output-<timestamp>/audit_report.md` + `artifacts/`
| H.1d | ufsecp ABI boundary | `fuzz_addr_bip32` | `fuzz_address_bip32_ffi` |
| H.2 | Adversarial fuzz (malform/edge) | `audit_fuzz` | `audit_fuzz` |
| H.3 | Fault injection simulation | `fault_injection` | `fault_injection` |
| H.4 | Corpus: `audit/corpus/` | seed corpus for deterministic fuzz | — |
| H.4 | Corpus: `audit/corpus/` | seed corpus for deterministic fuzz | -- |
### I. Constant-Time & Side-Channel
@ -116,31 +116,31 @@ Output: `audit-output-<timestamp>/audit_report.md` + `artifacts/`
|---|------|---------------|-------------------|
| I.1 | CT branch scan (disassembly) | `scripts/verify_ct_disasm.sh` | `artifacts/disasm/disasm_branch_scan.json` |
| I.2a | dudect: scalar_mul | `ct_sidechannel` (smoke: `|t| < 4.5`) | `artifacts/ctest/audit_report.json` |
| I.2b | dudect: field_inv, scalar_inv | `ct_sidechannel` | — |
| I.2c | dudect: ECDSA sign | `ct_sidechannel` | — |
| I.2d | dudect: Schnorr sign | `ct_sidechannel` | — |
| I.2e | dudect: cswap/cmov primitives | `audit_ct` | — |
| I.2b | dudect: field_inv, scalar_inv | `ct_sidechannel` | -- |
| I.2c | dudect: ECDSA sign | `ct_sidechannel` | -- |
| I.2d | dudect: Schnorr sign | `ct_sidechannel` | -- |
| I.2e | dudect: cswap/cmov primitives | `audit_ct` | -- |
| I.3 | Valgrind CT (uninit-as-secret) | `scripts/valgrind_ct_check.sh` | `artifacts/sanitizers/valgrind.log` |
| I.4 | CT contract: `audit_ct` (masks/cmov deep) | `audit_ct`, `ct`, `ct_equivalence` | `audit_report.json` |
| I.5 | FAST≡CT equivalence proof | `ct_equivalence`, `diag_scalar_mul` | `audit_report.json` |
| I.5 | FAST==CT equivalence proof | `ct_equivalence`, `diag_scalar_mul` | `audit_report.json` |
### J. ABI / API Stability & Safety
| # | Test | Implementation | CTest target |
|---|------|---------------|-------------|
| J.1 | ABI symbol check | `run_full_audit` (nm/dumpbin scan) | — |
| J.1 | ABI symbol check | `run_full_audit` (nm/dumpbin scan) | -- |
| J.2 | ABI version gate | `test_abi_gate.cpp` | `abi_gate` |
| J.3 | Calling convention (null/misaligned) | `audit_security` (null/bitflip/nonce) | — |
| J.4 | Error model compliance | `audit_fuzz`, `fault_injection` | — |
| J.3 | Calling convention (null/misaligned) | `audit_security` (null/bitflip/nonce) | -- |
| J.4 | Error model compliance | `audit_fuzz`, `fault_injection` | -- |
### K. Bindings & FFI Parity
| # | Test | Implementation | Evidence Artifact |
|---|------|---------------|-------------------|
| K.1 | Parity matrix (all ufsecp.h functions per binding) | `run_full_audit` scans `bindings/` | `artifacts/bindings/parity_matrix.json` |
| K.2 | Binding smoke tests | Per-language test suites in `bindings/<lang>/` | — |
| K.3 | Memory ownership tests | Binding-specific tests | — |
| K.4 | Package install tests | `pip`/`npm`/`nuget`/... install → run sample | manual / CI |
| K.2 | Binding smoke tests | Per-language test suites in `bindings/<lang>/` | -- |
| K.3 | Memory ownership tests | Binding-specific tests | -- |
| K.4 | Package install tests | `pip`/`npm`/`nuget`/... install -> run sample | manual / CI |
### L. Performance Regression
@ -161,7 +161,7 @@ Output: `audit-output-<timestamp>/audit_report.md` + `artifacts/`
---
## Unified Audit Runner — 8-Section Internal Mapping
## Unified Audit Runner -- 8-Section Internal Mapping
The C++ `unified_audit_runner` binary covers **E, F, G(internal), H(deterministic), I(dudect+CT), J(ABI gate), L(smoke)** in a single executable.
@ -178,16 +178,16 @@ The C++ `unified_audit_runner` binary covers **E, F, G(internal), H(deterministi
---
## Threat Model → Test Traceability
## Threat Model -> Test Traceability
| THREAT_MODEL.md Attack | Risk | Tests Covering It | Evidence Location |
|------------------------|------|-------------------|-------------------|
| A1: Timing Side Channels | HIGH | I.1 (disasm), I.2 (dudect), I.4 (audit_ct), I.5 (CT≡FAST), F.6 | `artifacts/disasm/`, `audit_report.json` (ct_analysis) |
| A1: Timing Side Channels | HIGH | I.1 (disasm), I.2 (dudect), I.4 (audit_ct), I.5 (CT==FAST), F.6 | `artifacts/disasm/`, `audit_report.json` (ct_analysis) |
| A2: Nonce Attacks | CRITICAL | E.1b (RFC6979), E.1c (BIP-340), F.6 (CT equivalence) | `audit_report.json` (standard_vectors) |
| A3: Arithmetic Errors | CRITICAL | E.1a, E.4, F.1–F.5, G.1–G.4 | `audit_report.json` (math_invariants, differential) |
| A4: Memory Safety | CRITICAL | D.1–D.5, H.1–H.4, J.3 | `artifacts/sanitizers/`, `audit_report.json` (fuzzing) |
| A5: Supply Chain | HIGH | A.3, B.1–B.3, A.4 | `artifacts/sbom.cdx.json`, `artifacts/SHA256SUMS.txt` |
| A6: GPU-Specific | HIGH | Separate GPU audit | — |
| A3: Arithmetic Errors | CRITICAL | E.1a, E.4, F.1-F.5, G.1-G.4 | `audit_report.json` (math_invariants, differential) |
| A4: Memory Safety | CRITICAL | D.1-D.5, H.1-H.4, J.3 | `artifacts/sanitizers/`, `audit_report.json` (fuzzing) |
| A5: Supply Chain | HIGH | A.3, B.1-B.3, A.4 | `artifacts/sbom.cdx.json`, `artifacts/SHA256SUMS.txt` |
| A6: GPU-Specific | HIGH | Separate GPU audit | -- |
### Not Covered by Automated Tests
@ -204,36 +204,36 @@ The C++ `unified_audit_runner` binary covers **E, F, G(internal), H(deterministi
```
audit-output-YYYYMMDD-HHMMSS/
├── audit_report.md # სრული აუდიტის რეპორტი
├── artifacts/
│ ├── SHA256SUMS.txt # ყველა ბინარის ჰეშები
│ ├── toolchain_fingerprint.json # კომპილატორი/CMake/OS ინფო
│ ├── provenance.json # SLSA-style build provenance
│ ├── dependency_scan.txt # ldd/dumpbin output
│ ├── sbom.cdx.json # CycloneDX SBOM
│ ├── static_analysis/
│ │ ├── clang_tidy.log
│ │ ├── cppcheck.log
│ │ └── dangerous_patterns.log
│ ├── sanitizers/
│ │ ├── asan_ubsan.log
│ │ ├── valgrind.log
│ │ └── tsan.log
│ ├── ctest/
│ │ ├── unified_runner_output.txt # Console output
│ │ ├── audit_report.json # Structured JSON (8 sections)
│ │ ├── audit_report.txt # Human-readable text
│ │ ├── results.json # CTest summary
│ │ └── ctest_output.txt
│ ├── disasm/
│ │ ├── disasm_branch_scan.json # CT function branch scan
│ │ └── disasm_branch_scan.txt
│ ├── bindings/
│ │ └── parity_matrix.json
│ ├── benchmark/
│ │ └── benchmark_output.txt
│ └── fuzz/
│ └── summary.json
+-- audit_report.md # სრული აუდიტის რეპორტი
+-- artifacts/
| +-- SHA256SUMS.txt # ყველა ბინარის ჰეშები
| +-- toolchain_fingerprint.json # კომპილატორი/CMake/OS ინფო
| +-- provenance.json # SLSA-style build provenance
| +-- dependency_scan.txt # ldd/dumpbin output
| +-- sbom.cdx.json # CycloneDX SBOM
| +-- static_analysis/
| | +-- clang_tidy.log
| | +-- cppcheck.log
| | +-- dangerous_patterns.log
| +-- sanitizers/
| | +-- asan_ubsan.log
| | +-- valgrind.log
| | +-- tsan.log
| +-- ctest/
| | +-- unified_runner_output.txt # Console output
| | +-- audit_report.json # Structured JSON (8 sections)
| | +-- audit_report.txt # Human-readable text
| | +-- results.json # CTest summary
| | +-- ctest_output.txt
| +-- disasm/
| | +-- disasm_branch_scan.json # CT function branch scan
| | +-- disasm_branch_scan.txt
| +-- bindings/
| | +-- parity_matrix.json
| +-- benchmark/
| | +-- benchmark_output.txt
| +-- fuzz/
| +-- summary.json
```
---
@ -249,4 +249,4 @@ audit-output-YYYYMMDD-HHMMSS/
---
*UltrafastSecp256k1 v3.14.0 — Audit Test Plan*
*UltrafastSecp256k1 v3.14.0 -- Audit Test Plan*

84
audit/CMakeLists.txt
View File

@ -1,25 +1,25 @@
# ============================================================================
# audit/CMakeLists.txt — აუდიტის ინფრასტრუქტურა
# audit/CMakeLists.txt -- Audit Infrastructure
# ============================================================================
#
# ეს დირექტორია შეიცავს ყველაფერს, რაც ბიბლიოთეკის აუდიტისთვისაა საჭირო:
# - Unified Audit Runner (ერთიანი შესრულება + JSON/TXT რეპორტი)
# This directory contains everything needed for the library audit:
# - Unified Audit Runner (unified execution + JSON/TXT report)
# - Standalone CTest targets (CT, differential, fault injection, ...)
# - Protocol tests (MuSig2, FROST, KAT)
# - Fuzz / adversarial tests
# - Cross-library differential tests (vs bitcoin-core/libsecp256k1)
#
# ბიბლიოთეკის core ტესტები (run_selftest) რჩება cpu/tests/-ში.
# Core library tests (run_selftest) remain in cpu/tests/.
# ============================================================================
if(NOT BUILD_TESTING)
return()
endif()
# Shorthand for cpu/tests/ — core library test sources reused by unified runner
# Shorthand for cpu/tests/ -- core library test sources reused by unified runner
set(CPU_TESTS_DIR ${CMAKE_CURRENT_SOURCE_DIR}/../cpu/tests)
# ── Helper: common link + stack options ────────────────────────────────────
# -- Helper: common link + stack options ------------------------------------
macro(audit_target_defaults target_name)
target_link_libraries(${target_name} PRIVATE fastsecp256k1)
if(MSVC OR (CMAKE_CXX_COMPILER_ID STREQUAL "Clang" AND WIN32))
@ -27,71 +27,71 @@ macro(audit_target_defaults target_name)
endif()
endmacro()
# ═══════════════════════════════════════════════════════════════════════════
# ===========================================================================
# Standalone CTest targets
# ═══════════════════════════════════════════════════════════════════════════
# ===========================================================================
# ── dudect side-channel timing test ───────────────────────────────────────
# -- dudect side-channel timing test ---------------------------------------
add_executable(test_ct_sidechannel_standalone test_ct_sidechannel.cpp)
audit_target_defaults(test_ct_sidechannel_standalone)
target_compile_definitions(test_ct_sidechannel_standalone PRIVATE STANDALONE_TEST)
add_test(NAME ct_sidechannel COMMAND test_ct_sidechannel_standalone)
set_tests_properties(ct_sidechannel PROPERTIES TIMEOUT 300)
# Smoke version of dudect (short run, relaxed threshold — safe for CI)
# Smoke version of dudect (short run, relaxed threshold -- safe for CI)
add_executable(test_ct_sidechannel_smoke test_ct_sidechannel.cpp)
audit_target_defaults(test_ct_sidechannel_smoke)
target_compile_definitions(test_ct_sidechannel_smoke PRIVATE STANDALONE_TEST DUDECT_SMOKE)
add_test(NAME ct_sidechannel_smoke COMMAND test_ct_sidechannel_smoke)
set_tests_properties(ct_sidechannel_smoke PROPERTIES TIMEOUT 120)
# ── Differential/self-consistency test ────────────────────────────────────
# -- Differential/self-consistency test ------------------------------------
add_executable(test_differential_standalone differential_test.cpp)
audit_target_defaults(test_differential_standalone)
add_test(NAME differential COMMAND test_differential_standalone)
set_tests_properties(differential PROPERTIES TIMEOUT 120)
# ── FAST≡CT equivalence test ─────────────────────────────────────────────
# -- FAST==CT equivalence test ---------------------------------------------
add_executable(test_ct_equivalence_standalone ${CPU_TESTS_DIR}/test_ct_equivalence.cpp)
audit_target_defaults(test_ct_equivalence_standalone)
target_compile_definitions(test_ct_equivalence_standalone PRIVATE STANDALONE_TEST)
add_test(NAME ct_equivalence COMMAND test_ct_equivalence_standalone)
# ── Fault injection simulation ────────────────────────────────────────────
# -- Fault injection simulation --------------------------------------------
add_executable(test_fault_injection test_fault_injection.cpp)
audit_target_defaults(test_fault_injection)
target_compile_definitions(test_fault_injection PRIVATE STANDALONE_TEST)
add_test(NAME fault_injection COMMAND test_fault_injection)
set_tests_properties(fault_injection PROPERTIES TIMEOUT 300)
# ── Debug invariant assertions ────────────────────────────────────────────
# -- Debug invariant assertions --------------------------------------------
add_executable(test_debug_invariants test_debug_invariants.cpp)
audit_target_defaults(test_debug_invariants)
add_test(NAME debug_invariants COMMAND test_debug_invariants)
set_tests_properties(debug_invariants PROPERTIES TIMEOUT 120)
# ── Fiat-Crypto comparison vectors ────────────────────────────────────────
# -- Fiat-Crypto comparison vectors ----------------------------------------
add_executable(test_fiat_crypto_vectors test_fiat_crypto_vectors.cpp)
audit_target_defaults(test_fiat_crypto_vectors)
target_compile_definitions(test_fiat_crypto_vectors PRIVATE STANDALONE_TEST)
add_test(NAME fiat_crypto_vectors COMMAND test_fiat_crypto_vectors)
set_tests_properties(fiat_crypto_vectors PROPERTIES TIMEOUT 300)
# ── Carry propagation stress test ─────────────────────────────────────────
# -- Carry propagation stress test -----------------------------------------
add_executable(test_carry_propagation test_carry_propagation.cpp)
audit_target_defaults(test_carry_propagation)
target_compile_definitions(test_carry_propagation PRIVATE STANDALONE_TEST)
add_test(NAME carry_propagation COMMAND test_carry_propagation)
set_tests_properties(carry_propagation PROPERTIES TIMEOUT 300)
# ── Cross-platform KAT equivalence ───────────────────────────────────────
# -- Cross-platform KAT equivalence ---------------------------------------
add_executable(test_cross_platform_kat test_cross_platform_kat.cpp)
audit_target_defaults(test_cross_platform_kat)
target_compile_definitions(test_cross_platform_kat PRIVATE STANDALONE_TEST)
add_test(NAME cross_platform_kat COMMAND test_cross_platform_kat)
set_tests_properties(cross_platform_kat PROPERTIES TIMEOUT 300)
# ── ABI version gate (compile-time check) ─────────────────────────────────
# -- ABI version gate (compile-time check) ---------------------------------
add_executable(test_abi_gate test_abi_gate.cpp)
target_include_directories(test_abi_gate PRIVATE
${CMAKE_CURRENT_SOURCE_DIR}/../include
@ -100,21 +100,21 @@ target_compile_definitions(test_abi_gate PRIVATE STANDALONE_TEST)
add_test(NAME abi_gate COMMAND test_abi_gate)
set_tests_properties(abi_gate PROPERTIES TIMEOUT 30)
# ── Standalone audit_fuzz test ────────────────────────────────────────────
# -- Standalone audit_fuzz test --------------------------------------------
add_executable(test_audit_fuzz_standalone audit_fuzz.cpp)
audit_target_defaults(test_audit_fuzz_standalone)
add_test(NAME audit_fuzz COMMAND test_audit_fuzz_standalone)
set_tests_properties(audit_fuzz PROPERTIES TIMEOUT 120)
# ── Diagnostic: ct::scalar_mul step-by-step comparison ────────────────────
# -- Diagnostic: ct::scalar_mul step-by-step comparison --------------------
add_executable(diag_scalar_mul ${CPU_TESTS_DIR}/diag_scalar_mul.cpp)
audit_target_defaults(diag_scalar_mul)
target_compile_definitions(diag_scalar_mul PRIVATE STANDALONE_TEST)
add_test(NAME diag_scalar_mul COMMAND diag_scalar_mul)
# ═══════════════════════════════════════════════════════════════════════════
# ===========================================================================
# Cross-library differential test (vs bitcoin-core/libsecp256k1)
# ═══════════════════════════════════════════════════════════════════════════
# ===========================================================================
option(SECP256K1_BUILD_CROSS_TESTS
"Build in-process differential tests against bitcoin-core/libsecp256k1" OFF)
@ -158,9 +158,9 @@ if(SECP256K1_BUILD_CROSS_TESTS)
message(STATUS " Cross-test vs libsecp256k1: ON (ref: v0.6.0)")
endif()
# ═══════════════════════════════════════════════════════════════════════════
# ===========================================================================
# Parser fuzz tests (deterministic pseudo-fuzz)
# ═══════════════════════════════════════════════════════════════════════════
# ===========================================================================
option(SECP256K1_BUILD_FUZZ_TESTS
"Build deterministic fuzz tests for parsers (DER, Schnorr, Pubkey)" OFF)
@ -197,9 +197,9 @@ if(SECP256K1_BUILD_FUZZ_TESTS AND TARGET ufsecp_static)
message(STATUS " Address + BIP32 + FFI fuzz tests: ON")
endif()
# ═══════════════════════════════════════════════════════════════════════════
# ===========================================================================
# MuSig2 + FROST protocol tests
# ═══════════════════════════════════════════════════════════════════════════
# ===========================================================================
option(SECP256K1_BUILD_PROTOCOL_TESTS
"Build MuSig2 + FROST protocol tests" OFF)
@ -243,14 +243,14 @@ if(SECP256K1_BUILD_PROTOCOL_TESTS)
message(STATUS " FROST reference KAT vectors: ON")
endif()
# ═══════════════════════════════════════════════════════════════════════════
# Unified Audit Runner — ერთიანი აუდიტის ბინარი
# ═══════════════════════════════════════════════════════════════════════════
# ===========================================================================
# Unified Audit Runner -- Unified Audit Binary
# ===========================================================================
# Single binary that runs ALL test modules + generates JSON/TXT reports.
# Build once, run on any platform. Self-audit artifact.
add_executable(unified_audit_runner
unified_audit_runner.cpp
# ── selftest modules (from cpu/tests/) ──
# -- selftest modules (from cpu/tests/) --
${CPU_TESTS_DIR}/test_large_scalar_multiplication.cpp
${CPU_TESTS_DIR}/test_mul.cpp
${CPU_TESTS_DIR}/test_arithmetic_correctness.cpp
@ -272,7 +272,7 @@ add_executable(unified_audit_runner
${CPU_TESTS_DIR}/test_bip340_vectors.cpp
${CPU_TESTS_DIR}/test_rfc6979_vectors.cpp
${CPU_TESTS_DIR}/test_ecc_properties.cpp
# ── standalone audit modules (in this directory) ──
# -- standalone audit modules (in this directory) --
test_carry_propagation.cpp
test_fault_injection.cpp
test_fiat_crypto_vectors.cpp
@ -281,14 +281,14 @@ add_executable(unified_audit_runner
test_abi_gate.cpp
test_ct_sidechannel.cpp
differential_test.cpp
# ── MuSig2 / FROST / adversarial / fuzz ──
# -- MuSig2 / FROST / adversarial / fuzz --
test_musig2_frost.cpp
test_musig2_frost_advanced.cpp
test_frost_kat.cpp
audit_fuzz.cpp
test_fuzz_parsers.cpp
test_fuzz_address_bip32_ffi.cpp
# ── Deep audit modules ──
# -- Deep audit modules --
audit_field.cpp
audit_scalar.cpp
audit_point.cpp
@ -296,14 +296,14 @@ add_executable(unified_audit_runner
audit_integration.cpp
audit_security.cpp
audit_perf.cpp
# ── ufsecp FFI implementation (needed by fuzz_parsers + fuzz_address) ──
# -- ufsecp FFI implementation (needed by fuzz_parsers + fuzz_address) --
${CMAKE_CURRENT_SOURCE_DIR}/../include/ufsecp/ufsecp_impl.cpp
# ── field representation tests ──
# -- field representation tests --
${CPU_TESTS_DIR}/test_field_26.cpp
# ── diagnostics ──
# -- diagnostics --
${CPU_TESTS_DIR}/diag_scalar_mul.cpp
)
# Conditionally add 5×52 field test (requires __uint128_t; skip on MSVC)
# Conditionally add 5x52 field test (requires __uint128_t; skip on MSVC)
if(NOT (MSVC AND NOT CMAKE_CXX_COMPILER_ID MATCHES "Clang"))
target_sources(unified_audit_runner PRIVATE ${CPU_TESTS_DIR}/test_field_52.cpp)
endif()
@ -322,9 +322,9 @@ endif()
add_test(NAME unified_audit COMMAND unified_audit_runner)
set_tests_properties(unified_audit PROPERTIES TIMEOUT 600)
# ═══════════════════════════════════════════════════════════════════════════
# ===========================================================================
# Full Audit Orchestrator (custom target)
# ═══════════════════════════════════════════════════════════════════════════
# ===========================================================================
# "cmake --build <dir> --target run_full_audit" runs the orchestrator script.
# On Windows, runs the PowerShell version; on Linux/macOS, runs the bash version.
if(WIN32)
@ -336,7 +336,7 @@ if(WIN32)
-SkipBuild
DEPENDS unified_audit_runner
WORKING_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}/.."
COMMENT "Full audit orchestrator (categories A–M)"
COMMENT "Full audit orchestrator (categories A-M)"
VERBATIM
)
else()
@ -345,7 +345,7 @@ else()
COMMAND bash "${CMAKE_CURRENT_SOURCE_DIR}/run_full_audit.sh"
DEPENDS unified_audit_runner
WORKING_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}/.."
COMMENT "Full audit orchestrator (categories A–M)"
COMMENT "Full audit orchestrator (categories A-M)"
VERBATIM
)
# Pass build dir via environment
@ -354,7 +354,7 @@ else()
)
endif()
# ── CTest labels for grouping ─────────────────────────────────────────────
# -- CTest labels for grouping ---------------------------------------------
# Label all audit tests so they can be run as a group:
# ctest --test-dir <build> -L audit
set_tests_properties(

126
audit/audit_results.txt
View File

@ -53,11 +53,11 @@ security = 17.17 sec*proc (1 test)
Total Test time (real) = 17.17 sec
=== audit_field ===
═══════════════════════════════════════════════════════════════
AUDIT I.1 — Field Arithmetic Correctness
═══════════════════════════════════════════════════════════════
===============================================================
AUDIT I.1 -- Field Arithmetic Correctness
===============================================================
[1] Addition mod p — overflow paths
[1] Addition mod p -- overflow paths
3101 checks
[2] Subtraction borrow-chain
@ -91,14 +91,14 @@ Total Test time (real) = 17.17 sec
[11] Random cross-check (100K operations)
264622 checks
═══════════════════════════════════════════════════════════════
===============================================================
FIELD AUDIT: 264622 passed, 0 failed
═══════════════════════════════════════════════════════════════
===============================================================
=== audit_scalar ===
═══════════════════════════════════════════════════════════════
AUDIT I.2 — Scalar Arithmetic Correctness
═══════════════════════════════════════════════════════════════
===============================================================
AUDIT I.2 -- Scalar Arithmetic Correctness
===============================================================
[1] Scalar mod n reduction
10003 checks
@ -124,14 +124,14 @@ Total Test time (real) = 17.17 sec
[8] Negate self-consistency
93215 checks
═══════════════════════════════════════════════════════════════
===============================================================
SCALAR AUDIT: 93215 passed, 0 failed
═══════════════════════════════════════════════════════════════
===============================================================
=== audit_point ===
═══════════════════════════════════════════════════════════════
AUDIT I.3 — Point Operations & Signature Correctness
═══════════════════════════════════════════════════════════════
===============================================================
AUDIT I.3 -- Point Operations & Signature Correctness
===============================================================
[1] Point at infinity correctness
7 checks
@ -167,14 +167,14 @@ Total Test time (real) = 17.17 sec
infinity hits (should be 0): 0
116124 checks
═══════════════════════════════════════════════════════════════
===============================================================
POINT AUDIT: 116124 passed, 0 failed
═══════════════════════════════════════════════════════════════
===============================================================
=== audit_ct ===
═══════════════════════════════════════════════════════════════
AUDIT II — Constant-Time & Side-Channel
═══════════════════════════════════════════════════════════════
===============================================================
AUDIT II -- Constant-Time & Side-Channel
===============================================================
[1] CT mask generation
12 checks
@ -213,20 +213,20 @@ Total Test time (real) = 17.17 sec
120651 checks
[13] Rudimentary timing variance (CT scalar_mul)
NOTE: Not a formal side-channel test — just sanity check.
NOTE: Not a formal side-channel test -- just sanity check.
k=1 avg: 363380 ns
k=n-1 avg: 351039 ns
ratio: 1.035 (ideal ≈ 1.0, concern > 1.2)
ratio: 1.035 (ideal ~= 1.0, concern > 1.2)
120652 checks
═══════════════════════════════════════════════════════════════
===============================================================
CT AUDIT: 120652 passed, 0 failed
═══════════════════════════════════════════════════════════════
===============================================================
=== audit_fuzz ===
═══════════════════════════════════════════════════════════════
AUDIT III — Fuzzing & Adversarial Testing
═══════════════════════════════════════════════════════════════
===============================================================
AUDIT III -- Fuzzing & Adversarial Testing
===============================================================
[1] Malformed public key rejection
3 checks
@ -258,56 +258,56 @@ Total Test time (real) = 17.17 sec
[10] Signature normalization / low-S (1K)
15461 checks
═══════════════════════════════════════════════════════════════
===============================================================
FUZZ AUDIT: 15461 passed, 0 failed
═══════════════════════════════════════════════════════════════
===============================================================
=== audit_perf ===
═══════════════════════════════════════════════════════════════
AUDIT IV — Performance Validation
═══════════════════════════════════════════════════════════════
===============================================================
AUDIT IV -- Performance Validation
===============================================================
[Field Arithmetic]
field_add 100000 iters 1038.9 µs 10.4 ns/op 96253895 op/s
field_sub 100000 iters 1349.3 µs 13.5 ns/op 74111349 op/s
field_mul 100000 iters 4343.2 µs 43.4 ns/op 23024445 op/s
field_sqr 100000 iters 3486.9 µs 34.9 ns/op 28678383 op/s
field_inv 10000 iters 7363.1 µs 736.3 ns/op 1358115 op/s
field_add 100000 iters 1038.9 us 10.4 ns/op 96253895 op/s
field_sub 100000 iters 1349.3 us 13.5 ns/op 74111349 op/s
field_mul 100000 iters 4343.2 us 43.4 ns/op 23024445 op/s
field_sqr 100000 iters 3486.9 us 34.9 ns/op 28678383 op/s
field_inv 10000 iters 7363.1 us 736.3 ns/op 1358115 op/s
[Scalar Arithmetic]
scalar_add 100000 iters 1174.9 µs 11.7 ns/op 85115655 op/s
scalar_sub 100000 iters 1093.6 µs 10.9 ns/op 91440527 op/s
scalar_mul 100000 iters 3212.1 µs 32.1 ns/op 31132611 op/s
scalar_inv 10000 iters 8019.5 µs 801.9 ns/op 1246964 op/s
scalar_add 100000 iters 1174.9 us 11.7 ns/op 85115655 op/s
scalar_sub 100000 iters 1093.6 us 10.9 ns/op 91440527 op/s
scalar_mul 100000 iters 3212.1 us 32.1 ns/op 31132611 op/s
scalar_inv 10000 iters 8019.5 us 801.9 ns/op 1246964 op/s
[Point Operations]
point_add 10000 iters 2006.9 µs 200.7 ns/op 4982829 op/s
point_dbl 10000 iters 882.7 µs 88.3 ns/op 11328954 op/s
point_scalar_mul 10000 iters 70965.3 µs 7096.5 ns/op 140914 op/s
point_to_compressed 10000 iters 9562.4 µs 956.2 ns/op 1045768 op/s
point_add 10000 iters 2006.9 us 200.7 ns/op 4982829 op/s
point_dbl 10000 iters 882.7 us 88.3 ns/op 11328954 op/s
point_scalar_mul 10000 iters 70965.3 us 7096.5 ns/op 140914 op/s
point_to_compressed 10000 iters 9562.4 us 956.2 ns/op 1045768 op/s
[ECDSA]
ecdsa_sign 1000 iters 10157.3 µs 10157.3 ns/op 98451 op/s
ecdsa_verify 1000 iters 29493.4 µs 29493.4 ns/op 33906 op/s
ecdsa_sign 1000 iters 10157.3 us 10157.3 ns/op 98451 op/s
ecdsa_verify 1000 iters 29493.4 us 29493.4 ns/op 33906 op/s
[Schnorr BIP-340]
schnorr_sign 1000 iters 19709.9 µs 19709.9 ns/op 50736 op/s
schnorr_verify 1000 iters 41495.0 µs 41495.0 ns/op 24099 op/s
schnorr_sign 1000 iters 19709.9 us 19709.9 ns/op 50736 op/s
schnorr_verify 1000 iters 41495.0 us 41495.0 ns/op 24099 op/s
[Constant-Time (comparison)]
ct_scalar_mul 1000 iters 313350.1 µs 313350.1 ns/op 3191 op/s
ct_generator_mul 1000 iters 316248.5 µs 316248.5 ns/op 3162 op/s
ct_scalar_mul 1000 iters 313350.1 us 313350.1 ns/op 3191 op/s
ct_generator_mul 1000 iters 316248.5 us 316248.5 ns/op 3162 op/s
═══════════════════════════════════════════════════════════════
===============================================================
Performance validation complete.
NOTE: This is a profiling benchmark, not a pass/fail test.
Compare results against known baselines for regression.
═══════════════════════════════════════════════════════════════
===============================================================
=== audit_security ===
═══════════════════════════════════════════════════════════════
AUDIT V — Security Hardening
═══════════════════════════════════════════════════════════════
===============================================================
AUDIT V -- Security Hardening
===============================================================
[1] Zero / identity key handling
5 checks
@ -339,14 +339,14 @@ Total Test time (real) = 17.17 sec
[10] High-S detection
17309 checks
═══════════════════════════════════════════════════════════════
===============================================================
SECURITY AUDIT: 17309 passed, 0 failed
═══════════════════════════════════════════════════════════════
===============================================================
=== audit_integration ===
═══════════════════════════════════════════════════════════════
AUDIT VI — Integration Testing
═══════════════════════════════════════════════════════════════
===============================================================
AUDIT VI -- Integration Testing
===============================================================
[1] ECDH key exchange symmetry (1K)
4001 checks
@ -357,7 +357,7 @@ Total Test time (real) = 17.17 sec
[3] ECDSA batch verification
4009 checks
[4] ECDSA sign → recover → verify (1K)
[4] ECDSA sign -> recover -> verify (1K)
10009 checks
[5] Schnorr cross-path: individual vs batch (500)
@ -379,6 +379,6 @@ Total Test time (real) = 17.17 sec
success: 5000/5000
13811 checks
═══════════════════════════════════════════════════════════════
===============================================================
INTEGRATION AUDIT: 13811 passed, 0 failed
═══════════════════════════════════════════════════════════════
===============================================================

74
audit/bench_ct_vs_libsecp_results.txt
View File

@ -1,53 +1,53 @@
═══════════════════════════════════════════════════════════════════════════════════════════════════════════════════════
=======================================================================================================================
CT Benchmark: UltrafastSecp256k1 vs libsecp256k1 (Bitcoin Core)
═══════════════════════════════════════════════════════════════════════════════════════════════════════════════════════
=======================================================================================================================
Iterations: keygen=5000, sign=2000, verify=2000, ecdh=2000, scalar_mul=1000, primitives=100000
┌────────────────────────────┬──────────────────────────────────────┬──────────────────────────────────────┬──────────┐
│ Operation │ UltrafastSecp256k1 (CT) │ libsecp256k1 │ Ratio │
├────────────────────────────┼──────────────────────────────────────┼──────────────────────────────────────┼──────────┤
│ Key generation (CT) │ 325532.2 ns/op 3072 op/s │ 12384.1 ns/op 80749 op/s │ 26.29x │ ⚠️ libsecp
│ Key generation (fast) │ 8475.7 ns/op 117985 op/s │ (N/A) │ — │
├────────────────────────────┼──────────────────────────────────────┼──────────────────────────────────────┼──────────┤
│ ECDSA sign │ 11335.2 ns/op 88221 op/s │ 17916.0 ns/op 55816 op/s │ 0.63x │ ✅ Ours
│ ECDSA verify │ 28406.1 ns/op 35204 op/s │ 21635.0 ns/op 46221 op/s │ 1.31x │ ⚠️ libsecp
├────────────────────────────┼──────────────────────────────────────┼──────────────────────────────────────┼──────────┤
│ Schnorr sign │ 20058.3 ns/op 49855 op/s │ 12698.5 ns/op 78749 op/s │ 1.58x │ ⚠️ libsecp
│ Schnorr verify │ 36450.9 ns/op 27434 op/s │ 20255.7 ns/op 49369 op/s │ 1.80x │ ⚠️ libsecp
├────────────────────────────┼──────────────────────────────────────┼──────────────────────────────────────┼──────────┤
│ ECDH │ 18951.1 ns/op 52767 op/s │ 22792.6 ns/op 43874 op/s │ 0.83x │ ✅ Ours
├────────────────────────────┼──────────────────────────────────────┼──────────────────────────────────────┼──────────┤
│ CT scalar_mul │ 304756.8 ns/op 3281 op/s │ 18239.6 ns/op 54826 op/s │ 16.71x │ ⚠️ libsecp
│ CT generator_mul │ 310891.2 ns/op 3217 op/s │ 12384.1 ns/op 80749 op/s │ 25.10x │ ⚠️ libsecp
│ Fast scalar_mul │ 8478.3 ns/op 117948 op/s │ (N/A) │ — │
├────────────────────────────┼──────────────────────────────────────┼──────────────────────────────────────┼──────────┤
│ CT cmov256 │ 0.3 ns/op 3278688525 op/s │ (N/A) │ — │
│ CT cswap256 │ 0.3 ns/op 3277506473 op/s │ (N/A) │ — │
│ CT table lookup (16) │ 325.6 ns/op 3071626 op/s │ (N/A) │ — │
│ CT is_zero_mask │ 0.2 ns/op 4477879276 op/s │ (N/A) │ — │
│ CT field_add │ 23.9 ns/op 41875907 op/s │ (N/A) │ — │
│ CT field_mul │ 61.0 ns/op 16385795 op/s │ (N/A) │ — │
│ CT field_inv │ 15068.3 ns/op 66364 op/s │ (N/A) │ — │
│ CT scalar_add │ 14.2 ns/op 70481998 op/s │ (N/A) │ — │
│ CT field_cmov │ 15.1 ns/op 66268350 op/s │ (N/A) │ — │
│ CT complete addition │ 1887.5 ns/op 529814 op/s │ (N/A) │ — │
└────────────────────────────┴──────────────────────────────────────┴──────────────────────────────────────┴──────────┘
+----------------------------+--------------------------------------+--------------------------------------+----------+
| Operation | UltrafastSecp256k1 (CT) | libsecp256k1 | Ratio |
+----------------------------+--------------------------------------+--------------------------------------+----------+
| Key generation (CT) | 325532.2 ns/op 3072 op/s | 12384.1 ns/op 80749 op/s | 26.29x | [!] libsecp
| Key generation (fast) | 8475.7 ns/op 117985 op/s | (N/A) | -- |
+----------------------------+--------------------------------------+--------------------------------------+----------+
| ECDSA sign | 11335.2 ns/op 88221 op/s | 17916.0 ns/op 55816 op/s | 0.63x | [OK] Ours
| ECDSA verify | 28406.1 ns/op 35204 op/s | 21635.0 ns/op 46221 op/s | 1.31x | [!] libsecp
+----------------------------+--------------------------------------+--------------------------------------+----------+
| Schnorr sign | 20058.3 ns/op 49855 op/s | 12698.5 ns/op 78749 op/s | 1.58x | [!] libsecp
| Schnorr verify | 36450.9 ns/op 27434 op/s | 20255.7 ns/op 49369 op/s | 1.80x | [!] libsecp
+----------------------------+--------------------------------------+--------------------------------------+----------+
| ECDH | 18951.1 ns/op 52767 op/s | 22792.6 ns/op 43874 op/s | 0.83x | [OK] Ours
+----------------------------+--------------------------------------+--------------------------------------+----------+
| CT scalar_mul | 304756.8 ns/op 3281 op/s | 18239.6 ns/op 54826 op/s | 16.71x | [!] libsecp
| CT generator_mul | 310891.2 ns/op 3217 op/s | 12384.1 ns/op 80749 op/s | 25.10x | [!] libsecp
| Fast scalar_mul | 8478.3 ns/op 117948 op/s | (N/A) | -- |
+----------------------------+--------------------------------------+--------------------------------------+----------+
| CT cmov256 | 0.3 ns/op 3278688525 op/s | (N/A) | -- |
| CT cswap256 | 0.3 ns/op 3277506473 op/s | (N/A) | -- |
| CT table lookup (16) | 325.6 ns/op 3071626 op/s | (N/A) | -- |
| CT is_zero_mask | 0.2 ns/op 4477879276 op/s | (N/A) | -- |
| CT field_add | 23.9 ns/op 41875907 op/s | (N/A) | -- |
| CT field_mul | 61.0 ns/op 16385795 op/s | (N/A) | -- |
| CT field_inv | 15068.3 ns/op 66364 op/s | (N/A) | -- |
| CT scalar_add | 14.2 ns/op 70481998 op/s | (N/A) | -- |
| CT field_cmov | 15.1 ns/op 66268350 op/s | (N/A) | -- |
| CT complete addition | 1887.5 ns/op 529814 op/s | (N/A) | -- |
+----------------------------+--------------------------------------+--------------------------------------+----------+
═══════════════════════════════════════════════════════════════════════════════════════════════════════════════════════
=======================================================================================================================
Summary
═══════════════════════════════════════════════════════════════════════════════════════════════════════════════════════
=======================================================================================================================
Legend:
Ratio = our_ns / libsecp_ns (< 1.0 = ours is faster)
✅ Ours — Our library is significantly faster (< 0.85x)
≈ Equal — Comparable speed (0.85x – 1.15x)
⚠️ libsecp — libsecp256k1 is faster (> 1.15x)
[OK] Ours -- Our library is significantly faster (< 0.85x)
~= Equal -- Comparable speed (0.85x - 1.15x)
[!] libsecp -- libsecp256k1 is faster (> 1.15x)
Note:
- All libsecp256k1 operations are CT (constant-time by design)
- Our library's 'fast' path is NOT CT, but is faster
- Our 'ct::' namespace provides CT guarantees on fast:: types
- CT primitives (cmov, cswap, lookup) are only exposed in our library
— libsecp256k1 does not expose these internal interfaces
-- libsecp256k1 does not expose these internal interfaces

26
audit/corpus/README.md
View File

@ -9,19 +9,19 @@ and protocol code. Every CI run replays these inputs to prevent regressions.
```
tests/corpus/
├── README.md (this file)
├── der/ DER signature edge-cases
│ └── *.bin raw byte inputs
├── schnorr/ Schnorr signature edge-cases
│ └── *.bin
├── pubkey/ Public key parser edge-cases
│ └── *.bin
├── address/ Address generation edge-cases
│ └── inputs.json JSON test vectors
├── bip32/ BIP-32 path parser edge-cases
│ └── paths.txt one path per line
└── ffi/ FFI boundary edge-cases
└── inputs.json structured test vectors
+-- README.md (this file)
+-- der/ DER signature edge-cases
| +-- *.bin raw byte inputs
+-- schnorr/ Schnorr signature edge-cases
| +-- *.bin
+-- pubkey/ Public key parser edge-cases
| +-- *.bin
+-- address/ Address generation edge-cases
| +-- inputs.json JSON test vectors
+-- bip32/ BIP-32 path parser edge-cases
| +-- paths.txt one path per line
+-- ffi/ FFI boundary edge-cases
+-- inputs.json structured test vectors
```
## Adding a New Corpus Entry

52
audit/run_full_audit.ps1
View File

@ -1,12 +1,12 @@
#!/usr/bin/env pwsh
# ============================================================================
# run_full_audit.ps1 — სრული აუდიტის ორქესტრატორი (Windows / Cross-Platform)
# run_full_audit.ps1 -- Full Audit Orchestrator (Windows / Cross-Platform)
# ============================================================================
#
# ერთი ბრძანებით გაშვება:
# Run with a single command:
# pwsh -NoProfile -File audit/run_full_audit.ps1
#
# ეს სკრიპტი ახორციელებს სრულ აუდიტ ციკლს (A–M კატეგორიები):
# This script performs a full audit cycle (A-M categories):
# A. Environment & Build Integrity
# B. Packaging & Supply Chain
# C. Static Analysis
@ -21,7 +21,7 @@
# L. Performance Regression
# M. Documentation Consistency
#
# გამომავალი არტეფაქტები (artifacts/ დირექტორიაში):
# Output artifacts (in artifacts/ directory):
# audit_report.md
# artifacts/SHA256SUMS.txt
# artifacts/sbom.cdx.json
@ -52,7 +52,7 @@ param(
Set-StrictMode -Version Latest
$ErrorActionPreference = "Continue" # Don't stop on individual test failures
# ── Resolve paths ──────────────────────────────────────────────────────────
# -- Resolve paths ----------------------------------------------------------
$ScriptDir = Split-Path -Parent $MyInvocation.MyCommand.Path
$RootDir = (Resolve-Path "$ScriptDir/..").Path
$Version = (Get-Content "$RootDir/VERSION.txt" -Raw).Trim()
@ -78,7 +78,7 @@ foreach ($d in @(
New-Item -ItemType Directory -Path $d -Force | Out-Null
}
# ── Globals for tracking ──────────────────────────────────────────────────
# -- Globals for tracking --------------------------------------------------
$Script:CategoryResults = [ordered]@{}
$Script:Findings = @()
@ -134,7 +134,7 @@ function Write-SubStep {
Write-Host " [$Status] $Text" -ForegroundColor $color
}
# ── Toolchain detection ───────────────────────────────────────────────────
# -- Toolchain detection ---------------------------------------------------
function Get-ToolchainFingerprint {
$fp = [ordered]@{
@ -541,10 +541,10 @@ function Run-CategoryD {
}
# ========================================================================
# E–I. Unified Audit Runner (Unit/KAT/Property/Differential/Fuzz/CT)
# E-I. Unified Audit Runner (Unit/KAT/Property/Differential/Fuzz/CT)
# ========================================================================
function Run-CategoriesEI {
Write-Section "E–I. Unified Audit Runner (Correctness + CT + Fuzz)"
Write-Section "E-I. Unified Audit Runner (Correctness + CT + Fuzz)"
$sw = [System.Diagnostics.Stopwatch]::StartNew()
$allPass = $true
@ -807,7 +807,7 @@ function Run-CategoryM {
}
# ========================================================================
# Report Generation — audit_report.md
# Report Generation -- audit_report.md
# ========================================================================
function Generate-AuditReportMd {
Write-Section "Generating Final Audit Report"
@ -819,8 +819,8 @@ function Generate-AuditReportMd {
$sb = [System.Text.StringBuilder]::new()
# ── Header ──
[void]$sb.AppendLine("# UltrafastSecp256k1 — Comprehensive Audit Report")
# -- Header --
[void]$sb.AppendLine("# UltrafastSecp256k1 -- Comprehensive Audit Report")
[void]$sb.AppendLine("")
[void]$sb.AppendLine("| Field | Value |")
[void]$sb.AppendLine("|-------|-------|")
@ -836,7 +836,7 @@ function Generate-AuditReportMd {
[void]$sb.AppendLine("| **CMake** | $($fp['cmake']) |")
[void]$sb.AppendLine("")
# ── 1. Executive Summary ──
# -- 1. Executive Summary --
[void]$sb.AppendLine("## 1. Executive Summary")
[void]$sb.AppendLine("")
[void]$sb.AppendLine("| Category | Status | Time |")
@ -850,9 +850,9 @@ function Generate-AuditReportMd {
$totalFail = ($Script:CategoryResults.Values | Where-Object { $_.Status -eq "FAIL" }).Count
if ($totalFail -eq 0) {
[void]$sb.AppendLine("> **AUDIT VERDICT: AUDIT-READY** — ყველა კატეგორია გავლილია.")
[void]$sb.AppendLine("> **AUDIT VERDICT: AUDIT-READY** -- All categories passed.")
} else {
[void]$sb.AppendLine("> **AUDIT VERDICT: AUDIT-BLOCKED** — $totalFail კატეგორია ვერ გავიდა.")
[void]$sb.AppendLine("> **AUDIT VERDICT: AUDIT-BLOCKED** -- $totalFail category(ies) failed.")
}
[void]$sb.AppendLine("")
@ -875,7 +875,7 @@ function Generate-AuditReportMd {
[void]$sb.AppendLine("- Physical fault injection not tested")
[void]$sb.AppendLine("")
# ── 2. Reproducibility & Integrity ──
# -- 2. Reproducibility & Integrity --
[void]$sb.AppendLine("## 2. Reproducibility & Integrity")
[void]$sb.AppendLine("")
[void]$sb.AppendLine("- **Toolchain fingerprint**: ``artifacts/toolchain_fingerprint.json``")
@ -885,7 +885,7 @@ function Generate-AuditReportMd {
[void]$sb.AppendLine("- **Dependency scan**: ``artifacts/dependency_scan.txt``")
[void]$sb.AppendLine("")
# ── 3. Test Results Tables ──
# -- 3. Test Results Tables --
[void]$sb.AppendLine("## 3. Test Results Tables")
[void]$sb.AppendLine("")
@ -943,7 +943,7 @@ function Generate-AuditReportMd {
[void]$sb.AppendLine("- **Parity matrix**: ``artifacts/bindings/parity_matrix.json``")
[void]$sb.AppendLine("")
# ── 4. Findings ──
# -- 4. Findings --
[void]$sb.AppendLine("## 4. Findings")
[void]$sb.AppendLine("")
if ($Script:Findings.Count -eq 0) {
@ -959,7 +959,7 @@ function Generate-AuditReportMd {
[void]$sb.AppendLine("### Finding Details")
[void]$sb.AppendLine("")
foreach ($f in $Script:Findings) {
[void]$sb.AppendLine("#### $($f.ID) — $($f.Description)")
[void]$sb.AppendLine("#### $($f.ID) -- $($f.Description)")
[void]$sb.AppendLine("")
[void]$sb.AppendLine("- **Severity**: $($f.Severity)")
[void]$sb.AppendLine("- **Component**: $($f.Component)")
@ -975,14 +975,14 @@ function Generate-AuditReportMd {
}
[void]$sb.AppendLine("")
# ── 5. Coverage & Unreachable ──
# -- 5. Coverage & Unreachable --
[void]$sb.AppendLine("## 5. Coverage & Unreachable Justifications")
[void]$sb.AppendLine("")
[void]$sb.AppendLine("- Code coverage report: run ``scripts/generate_coverage.sh`` separately")
[void]$sb.AppendLine("- Excluded lines policy: GPU paths, platform-specific assembly, unreachable error handlers")
[void]$sb.AppendLine("")
# ── 6. Risk Acceptance / Threat Model Mapping ──
# -- 6. Risk Acceptance / Threat Model Mapping --
[void]$sb.AppendLine("## 6. Risk Acceptance / Threat Model Mapping")
[void]$sb.AppendLine("")
[void]$sb.AppendLine("| Threat (from THREAT_MODEL.md) | Test Coverage | Evidence |")
@ -1002,7 +1002,7 @@ function Generate-AuditReportMd {
[void]$sb.AppendLine("- OS-level memory disclosure (cold boot, swap file)")
[void]$sb.AppendLine("")
# ── 7. Appendices ──
# -- 7. Appendices --
[void]$sb.AppendLine("## 7. Appendices")
[void]$sb.AppendLine("")
[void]$sb.AppendLine("| Artifact | Path |")
@ -1029,7 +1029,7 @@ function Generate-AuditReportMd {
[void]$sb.AppendLine("---")
[void]$sb.AppendLine("")
[void]$sb.AppendLine("*Generated by ``audit/run_full_audit.ps1`` at $Timestamp*")
[void]$sb.AppendLine("*UltrafastSecp256k1 v$Version — Comprehensive Audit Report*")
[void]$sb.AppendLine("*UltrafastSecp256k1 v$Version -- Comprehensive Audit Report*")
# Write report
$sb.ToString() | Out-File $reportPath -Encoding utf8
@ -1037,14 +1037,14 @@ function Generate-AuditReportMd {
}
# ========================================================================
# MAIN — ორქესტრაცია
# MAIN -- Orchestration
# ========================================================================
$mainSw = [System.Diagnostics.Stopwatch]::StartNew()
Write-Host ""
Write-Host ("=" * 70) -ForegroundColor Yellow
Write-Host " UltrafastSecp256k1 — Full Audit Orchestrator (A–M)" -ForegroundColor Yellow
Write-Host " UltrafastSecp256k1 -- Full Audit Orchestrator (A-M)" -ForegroundColor Yellow
Write-Host " Version: $Version | $Timestamp" -ForegroundColor Yellow
Write-Host " Build: $BuildDir" -ForegroundColor Yellow
Write-Host " Output: $OutputDir" -ForegroundColor Yellow
@ -1067,7 +1067,7 @@ Generate-AuditReportMd
$mainSw.Stop()
# ── Final Summary ──────────────────────────────────────────────────────
# -- Final Summary ------------------------------------------------------
Write-Host ""
Write-Host ("=" * 70) -ForegroundColor Cyan

44
audit/run_full_audit.sh
View File

@ -1,12 +1,12 @@
#!/usr/bin/env bash
# ============================================================================
# run_full_audit.sh — სრული აუდიტის ორქესტრატორი (Linux / macOS)
# run_full_audit.sh -- Full Audit Orchestrator (Linux / macOS)
# ============================================================================
#
# ერთი ბრძანებით გაშვება:
# Run with a single command:
# bash audit/run_full_audit.sh
#
# ეს სკრიპტი ახორციელებს სრულ აუდიტ ციკლს (A–M კატეგორიები):
# This script performs a full audit cycle (A-M categories):
# A. Environment & Build Integrity
# B. Packaging & Supply Chain
# C. Static Analysis
@ -21,7 +21,7 @@
# L. Performance Regression
# M. Documentation Consistency
#
# გამომავალი არტეფაქტები:
# Output artifacts:
# <output_dir>/audit_report.md
# <output_dir>/artifacts/...
# ============================================================================
@ -34,7 +34,7 @@ VERSION=$(cat "${ROOT_DIR}/VERSION.txt" 2>/dev/null || echo "0.0.0-dev")
TIMESTAMP=$(date -u +%Y-%m-%dT%H:%M:%SZ)
DATE_TAG=$(date +%Y%m%d-%H%M%S)
# ── Arguments ──────────────────────────────────────────────────────────────
# -- Arguments --------------------------------------------------------------
BUILD_DIR="${BUILD_DIR:-${ROOT_DIR}/build-audit}"
OUTPUT_DIR="${OUTPUT_DIR:-${ROOT_DIR}/audit-output-${DATE_TAG}}"
SKIP_BUILD="${SKIP_BUILD:-0}"
@ -47,7 +47,7 @@ NPROC="${NPROC:-$(nproc 2>/dev/null || sysctl -n hw.ncpu 2>/dev/null || echo 4)}
ARTIFACTS_DIR="${OUTPUT_DIR}/artifacts"
# ── Colors ─────────────────────────────────────────────────────────────────
# -- Colors -----------------------------------------------------------------
RED='\033[0;31m'
GREEN='\033[0;32m'
YELLOW='\033[0;33m'
@ -62,10 +62,10 @@ warn() { substep "$1" "WARN" "$YELLOW"; }
skip() { substep "$1" "SKIP" "$YELLOW"; }
info() { substep "$1" "..." "$NC"; }
# ── Create directories ─────────────────────────────────────────────────────
# -- Create directories -----------------------------------------------------
mkdir -p "${ARTIFACTS_DIR}"/{static_analysis,sanitizers,ctest,bindings,benchmark,disasm,fuzz}
# ── Result tracking ────────────────────────────────────────────────────────
# -- Result tracking --------------------------------------------------------
declare -A CATEGORY_STATUS
declare -A CATEGORY_SUMMARY
declare -A CATEGORY_TIME
@ -337,7 +337,7 @@ run_category_d() {
# D.2 TSan (if applicable)
# NOTE: TSan conflicts with ASan, separate build needed
# Skipping for now — library is mostly single-threaded
# Skipping for now -- library is mostly single-threaded
skip "TSan: skipped (library is primarily single-threaded)"
# D.3 Valgrind
@ -368,7 +368,7 @@ run_category_d() {
# E-I. Unified Audit Runner + CTest
# ========================================================================
run_categories_ei() {
section "E–I. Unified Audit Runner (Correctness + CT + Fuzz)"
section "E-I. Unified Audit Runner (Correctness + CT + Fuzz)"
local start_time=$SECONDS
local all_pass=1
@ -415,10 +415,10 @@ EOF
}
# ========================================================================
# I.extra — CT Disassembly Scan
# I.extra -- CT Disassembly Scan
# ========================================================================
run_ct_disasm() {
section "I.extra — CT Disassembly Branch Scan"
section "I.extra -- CT Disassembly Branch Scan"
local start_time=$SECONDS
local ct_script="${ROOT_DIR}/scripts/verify_ct_disasm.sh"
@ -569,7 +569,7 @@ run_category_m() {
}
# ========================================================================
# Report Generation — audit_report.md
# Report Generation -- audit_report.md
# ========================================================================
generate_report() {
section "Generating Final Audit Report"
@ -578,7 +578,7 @@ generate_report() {
local fp_file="${ARTIFACTS_DIR}/toolchain_fingerprint.json"
cat > "${report}" <<'HEADER'
# UltrafastSecp256k1 — Comprehensive Audit Report
# UltrafastSecp256k1 -- Comprehensive Audit Report
HEADER
@ -605,9 +605,9 @@ EOF
local tm="${CATEGORY_TIME[$cat_key]:-0}"
local icon="?"
case "${st}" in
PASS) icon="✅" ;;
FAIL) icon="❌" ;;
SKIP) icon="⏭" ;;
PASS) icon="[OK]" ;;
FAIL) icon="[FAIL]" ;;
SKIP) icon="[SKIP]" ;;
esac
echo "| **${cat_key}. ${sm}** | ${icon} ${st} | ${tm}s |" >> "${report}"
done
@ -619,10 +619,10 @@ EOF
if [[ ${fail_count} -eq 0 ]]; then
echo "" >> "${report}"
echo "> **AUDIT VERDICT: AUDIT-READY** — ყველა კატეგორია გავლილია." >> "${report}"
echo "> **AUDIT VERDICT: AUDIT-READY** -- All categories passed." >> "${report}"
else
echo "" >> "${report}"
echo "> **AUDIT VERDICT: AUDIT-BLOCKED** — ${fail_count} კატეგორია ვერ გავიდა." >> "${report}"
echo "> **AUDIT VERDICT: AUDIT-BLOCKED** -- ${fail_count} category(ies) failed." >> "${report}"
fi
cat >> "${report}" <<'EOF'
@ -716,7 +716,7 @@ EOF
echo "---" >> "${report}"
echo "" >> "${report}"
echo "*Generated by \`audit/run_full_audit.sh\` at ${TIMESTAMP}*" >> "${report}"
echo "*UltrafastSecp256k1 v${VERSION} — Comprehensive Audit Report*" >> "${report}"
echo "*UltrafastSecp256k1 v${VERSION} -- Comprehensive Audit Report*" >> "${report}"
pass "audit_report.md written to ${report}"
}
@ -727,7 +727,7 @@ EOF
echo ""
echo -e "${YELLOW}$(printf '=%.0s' {1..70})${NC}"
echo -e "${YELLOW} UltrafastSecp256k1 — Full Audit Orchestrator (A–M)${NC}"
echo -e "${YELLOW} UltrafastSecp256k1 -- Full Audit Orchestrator (A-M)${NC}"
echo -e "${YELLOW} Version: ${VERSION} | ${TIMESTAMP}${NC}"
echo -e "${YELLOW} Build: ${BUILD_DIR}${NC}"
echo -e "${YELLOW} Output: ${OUTPUT_DIR}${NC}"
@ -750,7 +750,7 @@ generate_report
TOTAL_ELAPSED=$(( SECONDS - TOTAL_START ))
# ── Final Summary ──
# -- Final Summary --
echo ""
echo -e "${CYAN}$(printf '=%.0s' {1..70})${NC}"
echo -e "${CYAN} AUDIT COMPLETE${NC}"

8
audit/test_abi_gate.cpp
View File

@ -64,9 +64,9 @@ int test_abi_gate_run() {
#ifndef UNIFIED_AUDIT_RUNNER
int main() {
printf("════════════════════════════════════════════════════════════\n");
printf("============================================================\n");
printf(" ABI Version Gate Test (compile-time)\n");
printf("════════════════════════════════════════════════════════════\n\n");
printf("============================================================\n\n");
// 1. ABI version macro must be defined and positive
printf(" UFSECP_ABI_VERSION: %u\n", (unsigned)UFSECP_ABI_VERSION);
@ -127,9 +127,9 @@ int main() {
unsigned int min_required = (0 << 16) | (0 << 8) | 0; // 0.0.0
CHECK(packed >= min_required, "Packed version >= minimum required (0.0.0)");
printf("\n════════════════════════════════════════════════════════════\n");
printf("\n============================================================\n");
printf(" Summary: %d passed, %d failed\n", g_pass, g_fail);
printf("════════════════════════════════════════════════════════════\n");
printf("============================================================\n");
return g_fail > 0 ? 1 : 0;
}

24
audit/test_carry_propagation.cpp
View File

@ -8,7 +8,7 @@
// 3. Cascading carry across all limbs
// 4. Values near p that trigger final reduction
// 5. Products that produce maximum intermediate values
// 6. Cross-limb boundary patterns (bit 63→64, 127→128, 191→192)
// 6. Cross-limb boundary patterns (bit 63->64, 127->128, 191->192)
// ============================================================================
#include <cstdio>
@ -145,13 +145,13 @@ static void test_cross_limb_carry() {
};
Pattern patterns[] = {
// Bit 63 set: carry from limb0 → limb1
// Bit 63 set: carry from limb0 -> limb1
{0x8000000000000000ULL, 0, 0, 0},
// Bit 127 set: carry from limb1 → limb2
// Bit 127 set: carry from limb1 -> limb2
{0, 0x8000000000000000ULL, 0, 0},
// Bit 191 set: carry from limb2 → limb3
// Bit 191 set: carry from limb2 -> limb3
{0, 0, 0x8000000000000000ULL, 0},
// Bit 255 set: carry from limb3 → reduction
// Bit 255 set: carry from limb3 -> reduction
{0, 0, 0, 0x8000000000000000ULL},
// All high-bits set
{0x8000000000000000ULL, 0x8000000000000000ULL,
@ -208,14 +208,14 @@ static void test_near_prime() {
CHECK(p_val.to_bytes() == zero.to_bytes(), "p reduces to 0");
// p + 1 should reduce to 1
// (but from_bytes reduces on load, so p → 0, then 0 + 1 = 1)
// (but from_bytes reduces on load, so p -> 0, then 0 + 1 = 1)
auto p_plus_1 = p_val + one;
CHECK(p_plus_1.to_bytes() == one.to_bytes(), "p + 1 reduces to 1");
// (p-1) + 1 = 0
CHECK((p_m1 + one).to_bytes() == zero.to_bytes(), "(p-1)+1 == 0");
// (p-1)^2 == 1 (since p-1 ≡ -1 mod p)
// (p-1)^2 == 1 (since p-1 == -1 mod p)
CHECK(p_m1.square().to_bytes() == one.to_bytes(), "(p-1)^2 == 1");
// (p-1) * (p-1) == 1
@ -226,7 +226,7 @@ static void test_near_prime() {
auto d = FieldElement::from_uint64(delta);
auto val = p_m1 - d + one; // = p - delta
// val + delta should == 0 (since val = p - delta ≡ -delta)
// val + delta should == 0 (since val = p - delta == -delta)
auto sum = val + d;
CHECK(sum.to_bytes() == zero.to_bytes(), "p-delta + delta == 0");
@ -389,10 +389,10 @@ int test_carry_propagation_run() {
// ============================================================================
#ifndef UNIFIED_AUDIT_RUNNER
int main() {
printf("════════════════════════════════════════════════════════════\n");
printf("============================================================\n");
printf(" Carry Propagation Stress Test\n");
printf(" Arithmetic boundary & limb carry-chain verification\n");
printf("════════════════════════════════════════════════════════════\n\n");
printf("============================================================\n\n");
test_all_ones(); printf("\n");
test_single_limb_max(); printf("\n");
@ -402,9 +402,9 @@ int main() {
test_scalar_carry(); printf("\n");
test_point_carry();
printf("\n════════════════════════════════════════════════════════════\n");
printf("\n============================================================\n");
printf(" Summary: %d passed, %d failed\n", g_pass, g_fail);
printf("════════════════════════════════════════════════════════════\n");
printf("============================================================\n");
return g_fail > 0 ? 1 : 0;
}

72
audit/test_cross_libsecp256k1.cpp
View File

@ -21,7 +21,7 @@
#include <array>
#include <random>
// ── UltrafastSecp256k1 (C++ namespace: secp256k1::fast) ────────────────────
// -- UltrafastSecp256k1 (C++ namespace: secp256k1::fast) --------------------
#include "secp256k1/field.hpp"
#include "secp256k1/scalar.hpp"
#include "secp256k1/point.hpp"
@ -29,7 +29,7 @@
#include "secp256k1/schnorr.hpp"
#include "secp256k1/sha256.hpp"
// ── Reference: bitcoin-core/libsecp256k1 (C API, secp256k1_* prefix) ───────
// -- Reference: bitcoin-core/libsecp256k1 (C API, secp256k1_* prefix) -------
#include <secp256k1.h>
#include <secp256k1_schnorrsig.h>
#include <secp256k1_extrakeys.h>
@ -38,7 +38,7 @@
// Alias to avoid confusion
namespace uf = secp256k1::fast;
// ── Test infrastructure ─────────────────────────────────────────────────────
// -- Test infrastructure -----------------------------------------------------
static int g_pass = 0;
static int g_fail = 0;
@ -72,7 +72,7 @@ static std::array<uint8_t, 32> random_seckey(const secp256k1_context* ctx) {
}
}
// ── Helpers: convert between UF types and raw bytes ─────────────────────────
// -- Helpers: convert between UF types and raw bytes -------------------------
static uf::Scalar scalar_from_bytes32(const uint8_t* b) {
std::array<uint8_t, 32> arr{};
@ -94,7 +94,7 @@ static std::array<uint8_t, 65> uf_uncompress_pubkey(const uf::Point& pt) {
return out;
}
// ── Test 1: Public Key Derivation ───────────────────────────────────────────
// -- Test 1: Public Key Derivation -------------------------------------------
static void test_pubkey_cross(const secp256k1_context* ctx) {
const int N = 500 * g_multiplier;
@ -133,11 +133,11 @@ static void test_pubkey_cross(const secp256k1_context* ctx) {
std::printf(" %d checks OK\n\n", g_pass);
}
// ── Test 2: ECDSA Sign(UF) → Verify(Ref) ───────────────────────────────────
// -- Test 2: ECDSA Sign(UF) -> Verify(Ref) -----------------------------------
static void test_ecdsa_uf_sign_ref_verify(const secp256k1_context* ctx) {
const int N = 500 * g_multiplier;
std::printf("[2] ECDSA: Sign with UF → Verify with libsecp256k1 (%d rounds)\n", N);
std::printf("[2] ECDSA: Sign with UF -> Verify with libsecp256k1 (%d rounds)\n", N);
for (int i = 0; i < N; ++i) {
auto sk_bytes = random_seckey(ctx);
@ -170,18 +170,18 @@ static void test_ecdsa_uf_sign_ref_verify(const secp256k1_context* ctx) {
std::printf(" %d checks OK\n\n", g_pass);
}
// ── Test 3: ECDSA Sign(Ref) → Verify(UF) ───────────────────────────────────
// -- Test 3: ECDSA Sign(Ref) -> Verify(UF) -----------------------------------
static void test_ecdsa_ref_sign_uf_verify(const secp256k1_context* ctx) {
const int N = 500 * g_multiplier;
std::printf("[3] ECDSA: Sign with libsecp256k1 → Verify with UF (%d rounds)\n", N);
std::printf("[3] ECDSA: Sign with libsecp256k1 -> Verify with UF (%d rounds)\n", N);
for (int i = 0; i < N; ++i) {
auto sk_bytes = random_seckey(ctx);
auto msg = random_bytes();
// --- Sign with reference libsecp256k1 ---
// Both libs expect a pre-hashed 32-byte digest — use msg directly.
// Both libs expect a pre-hashed 32-byte digest -- use msg directly.
secp256k1_ecdsa_signature ref_sig;
int sign_ok = secp256k1_ecdsa_sign(ctx, &ref_sig, msg.data(),
sk_bytes.data(), nullptr, nullptr);
@ -208,7 +208,7 @@ static void test_ecdsa_ref_sign_uf_verify(const secp256k1_context* ctx) {
std::printf(" %d checks OK\n\n", g_pass);
}
// ── Test 4: Schnorr (BIP-340) Cross-Verification ───────────────────────────
// -- Test 4: Schnorr (BIP-340) Cross-Verification ---------------------------
static void test_schnorr_cross(const secp256k1_context* ctx) {
const int N = 500 * g_multiplier;
@ -219,7 +219,7 @@ static void test_schnorr_cross(const secp256k1_context* ctx) {
auto msg = random_bytes();
auto aux = random_bytes();
// ── Sign with UF, verify with Ref ──
// -- Sign with UF, verify with Ref --
auto uf_sk = scalar_from_bytes32(sk_bytes.data());
auto uf_sig = secp256k1::schnorr_sign(uf_sk, msg, aux);
@ -235,7 +235,7 @@ static void test_schnorr_cross(const secp256k1_context* ctx) {
ctx, uf_sig_bytes.data(), msg.data(), msg.size(), &ref_xpk);
CHECK(ref_verify == 1, "ref: verify UF Schnorr sig");
// ── Sign with Ref, verify with UF ──
// -- Sign with Ref, verify with UF --
secp256k1_keypair ref_kp;
secp256k1_keypair_create(ctx, &ref_kp, sk_bytes.data());
@ -262,14 +262,14 @@ static void test_schnorr_cross(const secp256k1_context* ctx) {
bool uf_verify = secp256k1::schnorr_verify(ref_xpk_arr, msg, uf_ref_sig);
CHECK(uf_verify, "uf: verify ref Schnorr sig");
// ── x-only pubkeys must match ──
// -- x-only pubkeys must match --
CHECK(std::memcmp(uf_pk_x.data(), ref_xpk_bytes, 32) == 0,
"x-only pubkey match");
}
std::printf(" %d checks OK\n\n", g_pass);
}
// ── Test 5: ECDSA Compact Signature Byte-Exact Match ────────────────────────
// -- Test 5: ECDSA Compact Signature Byte-Exact Match ------------------------
static void test_ecdsa_sig_match(const secp256k1_context* ctx) {
const int N = 200 * g_multiplier;
@ -306,7 +306,7 @@ static void test_ecdsa_sig_match(const secp256k1_context* ctx) {
if (std::memcmp(ref_compact, uf_compact.data(), 64) == 0) {
++g_pass;
} else {
// Not necessarily a bug — might be different hash preprocessing.
// Not necessarily a bug -- might be different hash preprocessing.
// But log it for investigation.
static int warn_count = 0;
if (warn_count < 3) {
@ -319,12 +319,12 @@ static void test_ecdsa_sig_match(const secp256k1_context* ctx) {
std::printf(" %d checks OK\n\n", g_pass);
}
// ── Test 6: Edge Cases & Known Scalars ──────────────────────────────────────
// -- Test 6: Edge Cases & Known Scalars --------------------------------------
static void test_edge_cases(const secp256k1_context* ctx) {
std::printf("[6] Edge Cases: Known Scalar Pubkeys\n");
// k=1 → G
// k=1 -> G
{
uint8_t sk1[32] = {};
sk1[31] = 1;
@ -413,7 +413,7 @@ static void test_edge_cases(const secp256k1_context* ctx) {
std::printf(" %d checks OK\n\n", g_pass);
}
// ── Test 7: Point Addition Cross-Check ──────────────────────────────────────
// -- Test 7: Point Addition Cross-Check --------------------------------------
static void test_point_add_cross(const secp256k1_context* ctx) {
const int N = 200 * g_multiplier;
@ -452,14 +452,14 @@ static void test_point_add_cross(const secp256k1_context* ctx) {
std::printf(" %d checks OK\n\n", g_pass);
}
// ── Test 8: Schnorr Batch Verify Cross-Check ────────────────────────────────
// -- Test 8: Schnorr Batch Verify Cross-Check --------------------------------
#include "secp256k1/batch_verify.hpp"
static void test_schnorr_batch_cross(const secp256k1_context* ctx) {
const int N = 50 * g_multiplier;
const int BATCH_SIZE = 16;
std::printf("[8] Schnorr Batch Verify Cross-Check (%d batches × %d)\n",
std::printf("[8] Schnorr Batch Verify Cross-Check (%d batches x %d)\n",
N, BATCH_SIZE);
for (int batch = 0; batch < N; ++batch) {
@ -506,12 +506,12 @@ static void test_schnorr_batch_cross(const secp256k1_context* ctx) {
std::printf(" %d checks OK\n\n", g_pass);
}
// ── Test 9: ECDSA Batch Verify Cross-Check ──────────────────────────────────
// -- Test 9: ECDSA Batch Verify Cross-Check ----------------------------------
static void test_ecdsa_batch_cross(const secp256k1_context* ctx) {
const int N = 50 * g_multiplier;
const int BATCH_SIZE = 16;
std::printf("[9] ECDSA Batch Verify Cross-Check (%d batches × %d)\n",
std::printf("[9] ECDSA Batch Verify Cross-Check (%d batches x %d)\n",
N, BATCH_SIZE);
for (int batch = 0; batch < N; ++batch) {
@ -558,12 +558,12 @@ static void test_ecdsa_batch_cross(const secp256k1_context* ctx) {
std::printf(" %d checks OK\n\n", g_pass);
}
// ── Test 10: Extended Edge Cases ────────────────────────────────────────────
// -- Test 10: Extended Edge Cases --------------------------------------------
static void test_extended_edge_cases(const secp256k1_context* ctx) {
std::printf("[10] Extended Edge Cases: overflow, doubling, mutation\n");
// 10a: Scalar just below n (n-2) — different from test 6's n-1
// 10a: Scalar just below n (n-2) -- different from test 6's n-1
{
uint8_t sk[32] = {
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
@ -585,7 +585,7 @@ static void test_extended_edge_cases(const secp256k1_context* ctx) {
CHECK(std::memcmp(ref_comp, uf_comp.data(), 33) == 0, "k=n-2: pubkey match");
}
// 10b: Point doubling — P+P vs 2*P cross-check
// 10b: Point doubling -- P+P vs 2*P cross-check
{
const int N = 100 * g_multiplier;
for (int i = 0; i < N; ++i) {
@ -622,7 +622,7 @@ static void test_extended_edge_cases(const secp256k1_context* ctx) {
// Verify original is valid
CHECK(secp256k1::ecdsa_verify(msg, uf_pk, uf_sig), "original sig valid");
// Mutate r[0] → must be rejected
// Mutate r[0] -> must be rejected
auto compact = uf_sig.to_compact();
compact[0] ^= 0x01;
auto mutated = secp256k1::ECDSASignature::from_compact(compact);
@ -642,7 +642,7 @@ static void test_extended_edge_cases(const secp256k1_context* ctx) {
}
}
// 10d: Consecutive scalars: k, k+1, k+2 — verify (k+1)*G == k*G + G
// 10d: Consecutive scalars: k, k+1, k+2 -- verify (k+1)*G == k*G + G
{
const int N = 100 * g_multiplier;
auto G = uf::Point::generator();
@ -703,7 +703,7 @@ static void test_extended_edge_cases(const secp256k1_context* ctx) {
std::printf(" %d checks OK\n\n", g_pass);
}
// ── Main ────────────────────────────────────────────────────────────────────
// -- Main --------------------------------------------------------------------
int main(int argc, char* argv[]) {
if (argc > 1) {
@ -717,18 +717,18 @@ int main(int argc, char* argv[]) {
}
}
std::printf("═══════════════════════════════════════════════════════════════\n");
std::printf(" UltrafastSecp256k1 vs libsecp256k1 — Cross-Library Test\n");
std::printf("===============================================================\n");
std::printf(" UltrafastSecp256k1 vs libsecp256k1 -- Cross-Library Test\n");
std::printf(" Seed: 42 (deterministic) Multiplier: %d\n", g_multiplier);
std::printf("═══════════════════════════════════════════════════════════════\n\n");
std::printf("===============================================================\n\n");
// Create reference context (SIGN + VERIFY)
secp256k1_context* ctx = secp256k1_context_create(
SECP256K1_CONTEXT_SIGN | SECP256K1_CONTEXT_VERIFY);
test_pubkey_cross(ctx); // [1] pubkey derivation
test_ecdsa_uf_sign_ref_verify(ctx); // [2] UF sign → ref verify
test_ecdsa_ref_sign_uf_verify(ctx); // [3] ref sign → UF verify
test_ecdsa_uf_sign_ref_verify(ctx); // [2] UF sign -> ref verify
test_ecdsa_ref_sign_uf_verify(ctx); // [3] ref sign -> UF verify
test_schnorr_cross(ctx); // [4] Schnorr bidirectional
test_ecdsa_sig_match(ctx); // [5] RFC 6979 byte-exact
test_edge_cases(ctx); // [6] known scalars
@ -739,9 +739,9 @@ int main(int argc, char* argv[]) {
secp256k1_context_destroy(ctx);
std::printf("═══════════════════════════════════════════════════════════════\n");
std::printf("===============================================================\n");
std::printf(" TOTAL: %d passed, %d failed\n", g_pass, g_fail);
std::printf("═══════════════════════════════════════════════════════════════\n");
std::printf("===============================================================\n");
return g_fail > 0 ? 1 : 0;
}

24
audit/test_cross_platform_kat.cpp
View File

@ -4,7 +4,7 @@
// ============================================================================
// Generates deterministic golden outputs for ALL major operations.
// Every platform (x86, ARM64, RISC-V, WASM, ESP32, STM32) must produce
// identical byte-exact results — any divergence is a platform-specific bug.
// identical byte-exact results -- any divergence is a platform-specific bug.
//
// Mode 1 (default): Verify against embedded golden vectors
// Mode 2 (--generate): Print golden vectors to stdout (run once on reference)
@ -67,8 +67,8 @@ static void verify_hex(const char* label, const uint8_t* data, size_t len, const
CHECK(got == expected, msg);
}
// ── Deterministic test inputs ────────────────────────────────────────────────
// These are fixed across all platforms. NEVER change them — they define the KAT.
// -- Deterministic test inputs ------------------------------------------------
// These are fixed across all platforms. NEVER change them -- they define the KAT.
// Private key (arbitrary but deterministic)
static const std::array<uint8_t, 32> PRIVKEY_BYTES = {
@ -101,7 +101,7 @@ static const std::array<uint8_t, 32> AUX_RAND = {0};
// 1. Field arithmetic KAT
// ============================================================================
// Golden vectors — generated from reference platform
// Golden vectors -- generated from reference platform
struct KV { const char* label; const char* hex; };
// Pre-computed expected results for privkey=1 operations
@ -269,7 +269,7 @@ static void test_ecdsa_kat() {
bool ok = secp256k1::ecdsa_verify(MSG_HASH, pubkey, sig);
CHECK(ok, "ECDSA verify passes");
// Verify determinism: sign again → same r,s
// Verify determinism: sign again -> same r,s
auto sig2 = secp256k1::ecdsa_sign(MSG_HASH, privkey);
CHECK(sig2.r.to_bytes() == r_bytes, "ECDSA sign is deterministic (r)");
CHECK(sig2.s.to_bytes() == s_bytes, "ECDSA sign is deterministic (s)");
@ -304,7 +304,7 @@ static void test_schnorr_kat() {
bool ok = secp256k1::schnorr_verify(pubkey_x, MSG_HASH, sig);
CHECK(ok, "Schnorr verify passes");
// Determinism: sign again → same result
// Determinism: sign again -> same result
auto sig2 = secp256k1::schnorr_sign(privkey, MSG_HASH, AUX_RAND);
CHECK(sig2.r == sig.r, "Schnorr sign is deterministic (r)");
CHECK(sig2.s.to_bytes() == sig.s.to_bytes(), "Schnorr sign is deterministic (s)");
@ -325,7 +325,7 @@ static void test_serialization_kat() {
auto privkey = Scalar::from_bytes(PRIVKEY2_BYTES);
auto pubkey = Point::generator().scalar_mul(privkey);
// Compressed → Uncompressed round-trip
// Compressed -> Uncompressed round-trip
auto comp = pubkey.to_compressed();
auto uncomp = pubkey.to_uncompressed();
@ -372,16 +372,16 @@ int main(int argc, char** argv) {
for (int i = 1; i < argc; ++i) {
if (std::string(argv[i]) == "--generate") {
g_generate = true;
printf("// KAT Generator Mode — copy these vectors into golden arrays\n");
printf("// KAT Generator Mode -- copy these vectors into golden arrays\n");
printf("static const KV GOLDEN[] = {\n");
}
}
if (!g_generate) {
printf("════════════════════════════════════════════════════════════\n");
printf("============================================================\n");
printf(" Cross-Platform KAT Equivalence Test\n");
printf(" Phase II, Tasks 2.6.3 / 2.6.4\n");
printf("════════════════════════════════════════════════════════════\n\n");
printf("============================================================\n\n");
}
test_field_kat(); if(!g_generate) printf("\n");
@ -394,9 +394,9 @@ int main(int argc, char** argv) {
if (g_generate) {
printf("};\n");
} else {
printf("\n════════════════════════════════════════════════════════════\n");
printf("\n============================================================\n");
printf(" Summary: %d passed, %d failed\n", g_pass, g_fail);
printf("════════════════════════════════════════════════════════════\n");
printf("============================================================\n");
}
return g_fail > 0 ? 1 : 0;

6
audit/test_ct_sidechannel.cpp
View File

@ -1147,8 +1147,8 @@ static void test_ct_utils() {
// -- 5c: ct_memzero --------------------------------------------------
{
// Both classes: zero 32-byte buffer on the SAME memory.
// Class 0: pre-filled with pattern A → ct_memzero → same time
// Class 1: pre-filled with pattern B → ct_memzero → same time
// Class 0: pre-filled with pattern A -> ct_memzero -> same time
// Class 1: pre-filled with pattern B -> ct_memzero -> same time
// Both classes use memcpy (symmetric write) to avoid store-buffer
// asymmetry from memset-zero vs random_bytes on MSVC/Windows.
alignas(64) uint8_t buf[32];
@ -1378,7 +1378,7 @@ static void test_assembly_info() {
printf(" awk '/ct.*:$/,/^$/' | grep -cE 'j[a-z]{1,3}\\s'\n");
}
// Exportable run function (for unified audit runner — smoke mode)
// Exportable run function (for unified audit runner -- smoke mode)
int test_ct_sidechannel_smoke_run() {
g_pass = g_fail = 0;
test_ct_primitives();

128
audit/test_ct_sidechannel_results.txt
View File

@ -1,89 +1,89 @@
═══════════════════════════════════════════════════════════════
===============================================================
Side-Channel Attack Test Suite (dudect methodology)
Welch t-test: |t| > 4.5 → timing leak (p < 0.00001)
All inputs pre-generated — no RNG in measurement loops
═══════════════════════════════════════════════════════════════
Welch t-test: |t| > 4.5 -> timing leak (p < 0.00001)
All inputs pre-generated -- no RNG in measurement loops
===============================================================
[1] CT Primitives — Timing Test
is_zero_mask: |t| = 1.26 (49892/50108) ✅ CT
bool_to_mask: |t| = 1.07 (50273/49727) ✅ CT
cmov256: |t| = 0.01 (49897/50103) ✅ CT
cswap256: |t| = 0.06 (50246/49754) ✅ CT
ct_lookup_256: |t| = 1.12 (50200/49800) ✅ CT
ct_equal: |t| = 0.52 (50080/49920) ✅ CT
[1] CT Primitives -- Timing Test
is_zero_mask: |t| = 1.26 (49892/50108) [OK] CT
bool_to_mask: |t| = 1.07 (50273/49727) [OK] CT
cmov256: |t| = 0.01 (49897/50103) [OK] CT
cswap256: |t| = 0.06 (50246/49754) [OK] CT
ct_lookup_256: |t| = 1.12 (50200/49800) [OK] CT
ct_equal: |t| = 0.52 (50080/49920) [OK] CT
[2] CT Field Operations — Timing Test
field_add: |t| = 8.50 ⚠️ LEAK
✗ FAIL: ct::field_add timing leak
field_mul: |t| = 20.94 ⚠️ LEAK
✗ FAIL: ct::field_mul timing leak
field_sqr: |t| = 17.08 ⚠️ LEAK
✗ FAIL: ct::field_sqr timing leak
field_inv: |t| = 80.95 ⚠️ LEAK
✗ FAIL: ct::field_inv timing leak
field_cmov: |t| = 0.01 ✅ CT
field_is_zero: |t| = 0.86 ✅ CT
[2] CT Field Operations -- Timing Test
field_add: |t| = 8.50 [!] LEAK
X FAIL: ct::field_add timing leak
field_mul: |t| = 20.94 [!] LEAK
X FAIL: ct::field_mul timing leak
field_sqr: |t| = 17.08 [!] LEAK
X FAIL: ct::field_sqr timing leak
field_inv: |t| = 80.95 [!] LEAK
X FAIL: ct::field_inv timing leak
field_cmov: |t| = 0.01 [OK] CT
field_is_zero: |t| = 0.86 [OK] CT
[3] CT Scalar Operations — Timing Test
scalar_add: |t| = 9.50 ⚠️ LEAK
✗ FAIL: ct::scalar_add timing leak
scalar_sub: |t| = 0.11 ✅ CT
scalar_cmov: |t| = 0.98 ✅ CT
scalar_is_zero: |t| = 0.10 ✅ CT
scalar_bit: |t| = 192.60 ⚠️ LEAK
✗ FAIL: ct::scalar_bit timing leak
scalar_window: |t| = 52.00 ⚠️ LEAK
✗ FAIL: ct::scalar_window timing leak
[3] CT Scalar Operations -- Timing Test
scalar_add: |t| = 9.50 [!] LEAK
X FAIL: ct::scalar_add timing leak
scalar_sub: |t| = 0.11 [OK] CT
scalar_cmov: |t| = 0.98 [OK] CT
scalar_is_zero: |t| = 0.10 [OK] CT
scalar_bit: |t| = 192.60 [!] LEAK
X FAIL: ct::scalar_bit timing leak
scalar_window: |t| = 52.00 [!] LEAK
X FAIL: ct::scalar_window timing leak
[4] CT Point Operations — Timing Test (most critical)
complete_add (P+O vs P+Q): |t| = 22.69 ⚠️ LEAK
✗ FAIL: complete_add P+O vs P+Q timing leak
complete_add (P+P vs P+Q): |t| = 10.93 ⚠️ LEAK
✗ FAIL: complete_add P+P vs P+Q timing leak
scalar_mul (k=1 vs random): |t| = 16.09 (978/1022) ⚠️ LEAK
✗ FAIL: ct::scalar_mul k=1 vs random timing leak
scalar_mul (k=n-1 vs random):|t| = 1.15 (992/1008) ✅ CT
generator_mul (low vs high HW):|t| = 10.14 (1020/980) ⚠️ LEAK
✗ FAIL: ct::generator_mul low vs high HW timing leak
point_tbl_lookup (0 vs 15): |t| = 4.22 ✅ CT
[4] CT Point Operations -- Timing Test (most critical)
complete_add (P+O vs P+Q): |t| = 22.69 [!] LEAK
X FAIL: complete_add P+O vs P+Q timing leak
complete_add (P+P vs P+Q): |t| = 10.93 [!] LEAK
X FAIL: complete_add P+P vs P+Q timing leak
scalar_mul (k=1 vs random): |t| = 16.09 (978/1022) [!] LEAK
X FAIL: ct::scalar_mul k=1 vs random timing leak
scalar_mul (k=n-1 vs random):|t| = 1.15 (992/1008) [OK] CT
generator_mul (low vs high HW):|t| = 10.14 (1020/980) [!] LEAK
X FAIL: ct::generator_mul low vs high HW timing leak
point_tbl_lookup (0 vs 15): |t| = 4.22 [OK] CT
[5] CT Byte Utilities — Timing Test
ct_memcpy_if: |t| = 1.03 ✅ CT
ct_memswap_if: |t| = 0.89 ✅ CT
ct_memzero: |t| = 0.35 ✅ CT
ct_compare: |t| = 0.28 ✅ CT
[5] CT Byte Utilities -- Timing Test
ct_memcpy_if: |t| = 1.03 [OK] CT
ct_memswap_if: |t| = 0.89 [OK] CT
ct_memzero: |t| = 0.35 [OK] CT
ct_compare: |t| = 0.28 [OK] CT
[6] fast:: path control test (expected NOT CT)
(confirms that fast:: and ct:: actually differ)
fast::scalar_mul: |t| = 1314.79 ⏱️ NOT CT (expected)
fast::scalar_mul: |t| = 1314.79 [TIME] NOT CT (expected)
[7] Valgrind CLASSIFY/DECLASSIFY Test
ℹ️ Valgrind CT mode DISABLED
ℹ️ Enable: cmake -DSECP256K1_CT_VALGRIND=1
ℹ️ Run: valgrind ./test_ct_sidechannel
ct::scalar_mul classified: ✅
ct::field_{add,mul,sqr} classified: ✅
ct::scalar_{add,neg} classified: ✅
ct::field_cmov classified mask: ✅
ct::ct_lookup_256 classified index: ✅
ct::generator_mul classified: ✅
[i] Valgrind CT mode DISABLED
[i] Enable: cmake -DSECP256K1_CT_VALGRIND=1
[i] Run: valgrind ./test_ct_sidechannel
ct::scalar_mul classified: [OK]
ct::field_{add,mul,sqr} classified: [OK]
ct::scalar_{add,neg} classified: [OK]
ct::field_cmov classified mask: [OK]
ct::ct_lookup_256 classified index: [OK]
ct::generator_mul classified: [OK]
[8] Assembly Inspection — Instructions
[8] Assembly Inspection -- Instructions
Checking assembly of CT functions:
objdump -d build_rel/tests/test_ct_sidechannel | less
Look for in ct:: functions:
✅ Good: cmov, cmovne, cmove (branchless conditional)
❌ Bad: jz/jnz/je/jne (secret-dependent branch)
[OK] Good: cmov, cmovne, cmove (branchless conditional)
[FAIL] Bad: jz/jnz/je/jne (secret-dependent branch)
Quick automated check:
objdump -d build_rel/tests/test_ct_sidechannel | \
awk '/ct.*:$/,/^$/' | grep -cE 'j[a-z]{1,3}\s'
═══════════════════════════════════════════════════════════════
===============================================================
SIDE-CHANNEL AUDIT: 23 passed, 11 failed
⚠️ TIMING LEAKS DETECTED
═══════════════════════════════════════════════════════════════
[!] TIMING LEAKS DETECTED
===============================================================
Full certification steps:
1. Valgrind: -DSECP256K1_CT_VALGRIND=1 && valgrind ./test

22
audit/test_debug_invariants.cpp
View File

@ -1,6 +1,6 @@
// ============================================================================
// Debug Invariant Assertions Test
// Phase V, Task 5.3.3 — Verify invariant checking works in debug builds
// Phase V, Task 5.3.3 -- Verify invariant checking works in debug builds
// ============================================================================
// Tests that:
// 1. is_normalized_field_element correctly identifies canonical FE
@ -83,7 +83,7 @@ static void test_fe_normalization() {
CHECK(debug::is_normalized_field_element(a.square()), "sqr result normalized");
CHECK(debug::is_normalized_field_element(a.inverse()), "inv result normalized");
printf(" → all FE normalization checks passed\n");
printf(" -> all FE normalization checks passed\n");
}
// ============================================================================
@ -127,7 +127,7 @@ static void test_on_curve() {
Point P5 = P1.negate();
CHECK(debug::is_on_curve(P5), "-P must be on curve");
printf(" → all on-curve checks passed\n");
printf(" -> all on-curve checks passed\n");
}
// ============================================================================
@ -164,7 +164,7 @@ static void test_scalar_valid() {
CHECK(debug::is_valid_scalar(a.inverse()), "a^-1 must be valid");
CHECK(debug::is_valid_scalar(a.negate()), "-a must be valid");
printf(" → all scalar validity checks passed\n");
printf(" -> all scalar validity checks passed\n");
}
// ============================================================================
@ -195,7 +195,7 @@ static void test_macro_integration() {
SECP_ASSERT(1 + 1 == 2);
SECP_ASSERT_MSG(true, "this should not fail");
printf(" → all macros work correctly\n");
printf(" -> all macros work correctly\n");
}
// ============================================================================
@ -238,7 +238,7 @@ static void test_full_chain() {
auto x3 = (x.square() * x) + FieldElement::from_uint64(7);
CHECK(y2 == x3, "curve equation must hold");
printf(" → full chain invariants passed\n");
printf(" -> full chain invariants passed\n");
}
// ============================================================================
@ -250,7 +250,7 @@ static void test_debug_counters() {
auto& c = debug::counters();
CHECK(c.invariant_check_count > 0, "invariant counter must have accumulated");
printf(" → %llu invariant checks performed so far\n",
printf(" -> %llu invariant checks performed so far\n",
(unsigned long long)c.invariant_check_count);
}
@ -274,10 +274,10 @@ int test_debug_invariants_run() {
// ============================================================================
#ifndef UNIFIED_AUDIT_RUNNER
int main() {
printf("════════════════════════════════════════════════════════════\n");
printf("============================================================\n");
printf(" Debug Invariant Assertions Test\n");
printf(" Phase V, Task 5.3.3\n");
printf("════════════════════════════════════════════════════════════\n\n");
printf("============================================================\n\n");
test_fe_normalization();
printf("\n");
@ -291,9 +291,9 @@ int main() {
printf("\n");
test_debug_counters();
printf("\n════════════════════════════════════════════════════════════\n");
printf("\n============================================================\n");
printf(" Summary: %d passed, %d failed\n", g_pass, g_fail);
printf("════════════════════════════════════════════════════════════\n");
printf("============================================================\n");
// Print counter report
SECP_DEBUG_COUNTER_REPORT();

40
audit/test_fault_injection.cpp
View File

@ -1,12 +1,12 @@
// ============================================================================
// Fault Injection Simulation Test
// Phase IV, Task 4.4.6 — Inject bit-flips into intermediate computation states
// Phase IV, Task 4.4.6 -- Inject bit-flips into intermediate computation states
// ============================================================================
// Validates that:
// 1. Single bit-flip in scalar during mul → wrong result (detected)
// 2. Single bit-flip in point coord → wrong result / off-curve (detected)
// 3. Multiple random faults → never silently produce correct-looking output
// 4. Signature + message bit-flip → verification fails
// 1. Single bit-flip in scalar during mul -> wrong result (detected)
// 2. Single bit-flip in point coord -> wrong result / off-curve (detected)
// 3. Multiple random faults -> never silently produce correct-looking output
// 4. Signature + message bit-flip -> verification fails
// 5. CT operations fail-safe under corrupted inputs
//
// This is NOT a performance test. It proves the library won't silently
@ -77,7 +77,7 @@ static void flip_random_bit(uint8_t* data, size_t len) {
// ============================================================================
static void test_scalar_fault_injection() {
g_section = "scalar_fault";
printf("[1] Scalar fault injection (bit-flip in k → wrong kG)\n");
printf("[1] Scalar fault injection (bit-flip in k -> wrong kG)\n");
const int TRIALS = 500;
int detected = 0;
@ -106,7 +106,7 @@ static void test_scalar_fault_injection() {
}
CHECK(detected == TRIALS, "All scalar bit-flips must produce different results");
printf(" → %d/%d faults detected (expected: 100%%)\n", detected, TRIALS);
printf(" -> %d/%d faults detected (expected: 100%%)\n", detected, TRIALS);
}
// ============================================================================
@ -142,11 +142,11 @@ static void test_point_coord_fault() {
}
CHECK(detected == TRIALS, "All point faults must be detectable");
printf(" → %d/%d faults injected\n", detected, TRIALS);
printf(" -> %d/%d faults injected\n", detected, TRIALS);
}
// ============================================================================
// 3. ECDSA signature bit-flip → verification must fail
// 3. ECDSA signature bit-flip -> verification must fail
// ============================================================================
static void test_ecdsa_signature_fault() {
g_section = "ecdsa_sig_fault";
@ -200,7 +200,7 @@ static void test_ecdsa_signature_fault() {
CHECK(sig_faults_detected == TRIALS, "All r bit-flips must fail verify");
CHECK(msg_faults_detected == TRIALS, "All msg bit-flips must fail verify");
CHECK(key_faults_detected == TRIALS, "All s bit-flips must fail verify");
printf(" → r-fault: %d/%d, msg-fault: %d/%d, s-fault: %d/%d\n",
printf(" -> r-fault: %d/%d, msg-fault: %d/%d, s-fault: %d/%d\n",
sig_faults_detected, TRIALS,
msg_faults_detected, TRIALS,
key_faults_detected, TRIALS);
@ -243,7 +243,7 @@ static void test_schnorr_signature_fault() {
}
CHECK(detected == TRIALS, "All Schnorr sig faults must fail verify");
printf(" → %d/%d faults detected\n", detected, TRIALS);
printf(" -> %d/%d faults detected\n", detected, TRIALS);
}
// ============================================================================
@ -278,7 +278,7 @@ static void test_ct_fault_resilience() {
}
CHECK(detected == TRIALS, "ct_compare must detect all single-bit faults");
printf(" → %d/%d single-bit differences detected\n", detected, TRIALS);
printf(" -> %d/%d single-bit differences detected\n", detected, TRIALS);
// Test: ct_compare on identical data must return 0
for (int i = 0; i < 100; ++i) {
@ -333,7 +333,7 @@ static void test_cascading_fault() {
}
CHECK(detected == TRIALS, "All cascading faults must produce different results");
printf(" → %d/%d cascading faults detected\n", detected, TRIALS);
printf(" -> %d/%d cascading faults detected\n", detected, TRIALS);
}
// ============================================================================
@ -371,7 +371,7 @@ static void test_addition_fault() {
}
CHECK(detected == TRIALS, "All addition faults must produce different results");
printf(" → %d/%d addition faults detected\n", detected, TRIALS);
printf(" -> %d/%d addition faults detected\n", detected, TRIALS);
}
// ============================================================================
@ -391,7 +391,7 @@ static void test_glv_fault() {
// Standard scalar_mul (uses GLV internally)
Point R1 = G.scalar_mul(k);
// Faulted scalar — should give different result
// Faulted scalar -- should give different result
auto k_bytes = k.to_bytes();
flip_random_bit(k_bytes.data(), 32);
Scalar k_faulted = Scalar::from_bytes(k_bytes);
@ -405,7 +405,7 @@ static void test_glv_fault() {
}
CHECK(consistent == TRIALS, "GLV must be sensitive to all input faults");
printf(" → %d/%d GLV fault sensitivity confirmed\n", consistent, TRIALS);
printf(" -> %d/%d GLV fault sensitivity confirmed\n", consistent, TRIALS);
}
// ============================================================================
@ -430,10 +430,10 @@ int test_fault_injection_run() {
// ============================================================================
#ifndef UNIFIED_AUDIT_RUNNER
int main() {
printf("════════════════════════════════════════════════════════════\n");
printf("============================================================\n");
printf(" Fault Injection Simulation Test\n");
printf(" Phase IV, Task 4.4.6\n");
printf("════════════════════════════════════════════════════════════\n\n");
printf("============================================================\n\n");
test_scalar_fault_injection();
printf("\n");
@ -451,9 +451,9 @@ int main() {
printf("\n");
test_glv_fault();
printf("\n════════════════════════════════════════════════════════════\n");
printf("\n============================================================\n");
printf(" Summary: %d passed, %d failed\n", g_pass, g_fail);
printf("════════════════════════════════════════════════════════════\n");
printf("============================================================\n");
return g_fail > 0 ? 1 : 0;
}

20
audit/test_fiat_crypto_vectors.cpp
View File

@ -1,6 +1,6 @@
// ============================================================================
// Fiat-Crypto Reference Vector Comparison Test
// Phase V, Task 5.3.1 — Compare field arithmetic against formally-verified
// Phase V, Task 5.3.1 -- Compare field arithmetic against formally-verified
// reference implementations (Fiat-Cryptography project)
// ============================================================================
//
@ -99,7 +99,7 @@ static const MulVector MUL_VECTORS[] = {
"0000000000000000000000000000000000000000000000000000000000000000",
"0000000000000000000000000000000000000000000000000000000000000000"
},
// vec3: (p-1) * (p-1) mod p = 1 (since (p-1) ≡ -1 mod p, (-1)*(-1) = 1)
// vec3: (p-1) * (p-1) mod p = 1 (since (p-1) == -1 mod p, (-1)*(-1) = 1)
{
"FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFC2E",
"FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFC2E",
@ -120,7 +120,7 @@ static const MulVector MUL_VECTORS[] = {
"FD3DC529C6EB60FB9D166034CF3C1A5A72324AA9DFD3428A56D7E1CE0179FD9B"
},
// vec6: large values near the prime
// a = p - 3, b = p - 5 → a*b = 15 mod p
// a = p - 3, b = p - 5 -> a*b = 15 mod p
{
"FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFC2C",
"FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFC2A",
@ -195,7 +195,7 @@ static const InvVector INV_VECTORS[] = {
"0000000000000000000000000000000000000000000000000000000000000002",
"7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF7FFFFE18"
},
// (p-1)^(-1) = (p-1) since (p-1) ≡ -1 and (-1)^(-1) = -1
// (p-1)^(-1) = (p-1) since (p-1) == -1 and (-1)^(-1) = -1
{
"FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFC2E",
"FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFC2E"
@ -203,7 +203,7 @@ static const InvVector INV_VECTORS[] = {
// 3^(-1) mod p
// sage: GF(p)(3)^(-1) = 0xAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAFD97B1
// Actually: GF(p)(3)^(-1) * 3 = 1
// p = 2^256 - 2^32 - 977, (p+1)/3 if p ≡ 2 mod 3
// p = 2^256 - 2^32 - 977, (p+1)/3 if p == 2 mod 3
// sage: pow(3, -1, 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFC2F)
// = 0xAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA5555529A
{
@ -337,7 +337,7 @@ static void test_point_vectors() {
// nG = O (infinity) -- scalar_mul with n should give identity
auto n = scalar_from_hex("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141");
// n reduces to 0, so nG = O — but the scalar is 0 after reduction, so:
// n reduces to 0, so nG = O -- but the scalar is 0 after reduction, so:
// Just test that scalar_mul with order produces identity
CHECK(n.is_zero(), "n reduces to 0 (used as sanity)");
@ -457,10 +457,10 @@ int test_fiat_crypto_vectors_run() {
// ============================================================================
#ifndef UNIFIED_AUDIT_RUNNER
int main() {
printf("════════════════════════════════════════════════════════════\n");
printf("============================================================\n");
printf(" Fiat-Crypto Reference Vector Comparison Test\n");
printf(" Phase V, Task 5.3.1\n");
printf("════════════════════════════════════════════════════════════\n\n");
printf("============================================================\n\n");
test_mul_vectors(); printf("\n");
test_sqr_vectors(); printf("\n");
@ -471,9 +471,9 @@ int main() {
test_algebraic_identities(); printf("\n");
test_serialization_roundtrip();
printf("\n════════════════════════════════════════════════════════════\n");
printf("\n============================================================\n");
printf(" Summary: %d passed, %d failed\n", g_pass, g_fail);
printf("════════════════════════════════════════════════════════════\n");
printf("============================================================\n");
return g_fail > 0 ? 1 : 0;
}

64
audit/test_frost_kat.cpp
View File

@ -4,7 +4,7 @@
// Pinned deterministic FROST test vectors for regression:
// - Lagrange coefficient correctness (known math values)
// - DKG share consistency (Shamir secret reconstruction)
// - Signing round determinism (same seeds → same outputs)
// - Signing round determinism (same seeds -> same outputs)
// - Aggregate signature BIP-340 verification
// - Cross-threshold consistency (2-of-3 vs 3-of-5 group key for same secrets)
//
@ -35,7 +35,7 @@ using secp256k1::fast::Scalar;
using secp256k1::fast::Point;
using secp256k1::fast::FieldElement;
// ── Minimal test harness ─────────────────────────────────────────────────────
// -- Minimal test harness -----------------------------------------------------
static int g_pass = 0;
static int g_fail = 0;
@ -47,7 +47,7 @@ static int g_fail = 0;
} \
} while(0)
// ── Helpers ──────────────────────────────────────────────────────────────────
// -- Helpers ------------------------------------------------------------------
static std::array<uint8_t, 32> make_seed(uint64_t val) {
std::array<uint8_t, 32> seed{};
@ -60,9 +60,9 @@ static bool points_equal(const Point& a, const Point& b) {
return a.to_compressed() == b.to_compressed();
}
// ═══════════════════════════════════════════════════════════════════════════════
// ===============================================================================
// Test 1: Lagrange Coefficient Mathematical Properties
// ═══════════════════════════════════════════════════════════════════════════════
// ===============================================================================
static void test_lagrange_properties() {
std::printf("[1] Lagrange Coefficient: Mathematical Properties\n");
@ -160,9 +160,9 @@ static void test_lagrange_properties() {
}
}
// ═══════════════════════════════════════════════════════════════════════════════
// Test 2: DKG Determinism — Same Seeds Produce Same Key Packages
// ═══════════════════════════════════════════════════════════════════════════════
// ===============================================================================
// Test 2: DKG Determinism -- Same Seeds Produce Same Key Packages
// ===============================================================================
static void test_dkg_determinism() {
std::printf("[2] FROST DKG: Determinism with Fixed Seeds\n");
@ -172,7 +172,7 @@ static void test_dkg_determinism() {
auto seed2 = make_seed(0xF205E002);
auto seed3 = make_seed(0xF205E003);
// Run DKG twice with identical seeds — must produce identical results
// Run DKG twice with identical seeds -- must produce identical results
std::array<uint8_t, 33> first_group_key{};
for (int trial = 0; trial < 2; ++trial) {
@ -208,9 +208,9 @@ static void test_dkg_determinism() {
}
}
// ═══════════════════════════════════════════════════════════════════════════════
// Test 3: DKG Share Verification — Feldman VSS Commitment Check
// ═══════════════════════════════════════════════════════════════════════════════
// ===============================================================================
// Test 3: DKG Share Verification -- Feldman VSS Commitment Check
// ===============================================================================
static void test_dkg_feldman_vss() {
std::printf("[3] FROST DKG: Feldman VSS Commitment Verification\n");
@ -257,9 +257,9 @@ static void test_dkg_feldman_vss() {
}
}
// ═══════════════════════════════════════════════════════════════════════════════
// Test 4: Full 2-of-3 Signing — End-to-End with BIP-340 Verify
// ═══════════════════════════════════════════════════════════════════════════════
// ===============================================================================
// Test 4: Full 2-of-3 Signing -- End-to-End with BIP-340 Verify
// ===============================================================================
static void test_2of3_full_signing() {
std::printf("[4] FROST 2-of-3: Full Signing -> BIP-340 Verify\n");
@ -335,9 +335,9 @@ static void test_2of3_full_signing() {
}
}
// ═══════════════════════════════════════════════════════════════════════════════
// Test 5: Full 3-of-5 Signing — Larger Threshold
// ═══════════════════════════════════════════════════════════════════════════════
// ===============================================================================
// Test 5: Full 3-of-5 Signing -- Larger Threshold
// ===============================================================================
static void test_3of5_full_signing() {
std::printf("[5] FROST 3-of-5: Full Signing -> BIP-340 Verify\n");
@ -441,9 +441,9 @@ static void test_3of5_full_signing() {
"different subsets produce different signatures");
}
// ═══════════════════════════════════════════════════════════════════════════════
// ===============================================================================
// Test 6: Lagrange Coefficient Consistency Across Subsets
// ═══════════════════════════════════════════════════════════════════════════════
// ===============================================================================
static void test_lagrange_consistency() {
std::printf("[6] Lagrange Coefficients: Consistency Across 10 Subsets\n");
@ -483,9 +483,9 @@ static void test_lagrange_consistency() {
}
}
// ═══════════════════════════════════════════════════════════════════════════════
// Test 7: Pinned KAT — DKG Group Key from Known Seeds
// ═══════════════════════════════════════════════════════════════════════════════
// ===============================================================================
// Test 7: Pinned KAT -- DKG Group Key from Known Seeds
// ===============================================================================
static void test_pinned_dkg_group_key() {
std::printf("[7] Pinned KAT: DKG Group Key Determinism\n");
@ -525,9 +525,9 @@ static void test_pinned_dkg_group_key() {
CHECK(gpk_run1 == gpk_run2, "KAT group key identical across runs");
}
// ═══════════════════════════════════════════════════════════════════════════════
// Test 8: Pinned KAT — Full Signing Round-Trip
// ═══════════════════════════════════════════════════════════════════════════════
// ===============================================================================
// Test 8: Pinned KAT -- Full Signing Round-Trip
// ===============================================================================
static void test_pinned_signing_roundtrip() {
std::printf("[8] Pinned KAT: Full Signing Round-Trip Determinism\n");
@ -583,9 +583,9 @@ static void test_pinned_signing_roundtrip() {
CHECK(sig1.s == sig2.s, "KAT sig s identical");
}
// ═══════════════════════════════════════════════════════════════════════════════
// ===============================================================================
// Test 9: Secret Reconstruction from DKG Shares
// ═══════════════════════════════════════════════════════════════════════════════
// ===============================================================================
static void test_secret_reconstruction() {
std::printf("[9] FROST DKG: Secret Reconstruction via Lagrange\n");
@ -634,9 +634,9 @@ static void test_secret_reconstruction() {
"reconstructed_secret * G == group_public_key (x-coord)");
}
// ═══════════════════════════════════════════════════════════════════════════════
// ===============================================================================
// _run() entry point for unified audit runner
// ═══════════════════════════════════════════════════════════════════════════════
// ===============================================================================
int test_frost_kat_run() {
g_pass = 0; g_fail = 0;
@ -654,9 +654,9 @@ int test_frost_kat_run() {
return g_fail > 0 ? 1 : 0;
}
// ═══════════════════════════════════════════════════════════════════════════════
// ===============================================================================
// Main (standalone only)
// ═══════════════════════════════════════════════════════════════════════════════
// ===============================================================================
#ifndef UNIFIED_AUDIT_RUNNER
int main() {

66
audit/test_fuzz_address_bip32_ffi.cpp
View File

@ -30,7 +30,7 @@
// C ABI
#include "ufsecp/ufsecp.h"
// ── Infrastructure ──────────────────────────────────────────────────────────
// -- Infrastructure ----------------------------------------------------------
static int g_pass = 0;
static int g_fail = 0;
@ -76,9 +76,9 @@ static bool make_valid_pubkey(ufsecp_ctx* ctx, uint8_t pubkey33[33]) {
return ufsecp_pubkey_create(ctx, privkey, pubkey33) == UFSECP_OK;
}
// ═══════════════════════════════════════════════════════════════════════════
// ===========================================================================
// Suite [1]: P2PKH Address Fuzz (Base58Check)
// ═══════════════════════════════════════════════════════════════════════════
// ===========================================================================
static void suite_1_p2pkh_fuzz(ufsecp_ctx* ctx) {
std::printf("\n[1] P2PKH Address Fuzz (Base58Check)\n");
@ -159,9 +159,9 @@ static void suite_1_p2pkh_fuzz(ufsecp_ctx* ctx) {
}
}
// ═══════════════════════════════════════════════════════════════════════════
// ===========================================================================
// Suite [2]: P2WPKH Address Fuzz (Bech32)
// ═══════════════════════════════════════════════════════════════════════════
// ===========================================================================
static void suite_2_p2wpkh_fuzz(ufsecp_ctx* ctx) {
std::printf("\n[2] P2WPKH Address Fuzz (Bech32)\n");
@ -223,9 +223,9 @@ static void suite_2_p2wpkh_fuzz(ufsecp_ctx* ctx) {
}
}
// ═══════════════════════════════════════════════════════════════════════════
// ===========================================================================
// Suite [3]: P2TR Address Fuzz (Bech32m)
// ═══════════════════════════════════════════════════════════════════════════
// ===========================================================================
static void suite_3_p2tr_fuzz(ufsecp_ctx* ctx) {
std::printf("\n[3] P2TR Address Fuzz (Bech32m)\n");
@ -293,9 +293,9 @@ static void suite_3_p2tr_fuzz(ufsecp_ctx* ctx) {
}
}
// ═══════════════════════════════════════════════════════════════════════════
// ===========================================================================
// Suite [4]: WIF Encode/Decode Fuzz
// ═══════════════════════════════════════════════════════════════════════════
// ===========================================================================
static void suite_4_wif_fuzz(ufsecp_ctx* ctx) {
std::printf("\n[4] WIF Encode/Decode Fuzz\n");
@ -374,9 +374,9 @@ static void suite_4_wif_fuzz(ufsecp_ctx* ctx) {
}
}
// ═══════════════════════════════════════════════════════════════════════════
// ===========================================================================
// Suite [5]: BIP32 Master Key from Seed Fuzz
// ═══════════════════════════════════════════════════════════════════════════
// ===========================================================================
static void suite_5_bip32_master_fuzz(ufsecp_ctx* ctx) {
std::printf("\n[5] BIP32 Master Key from Seed Fuzz\n");
@ -423,9 +423,9 @@ static void suite_5_bip32_master_fuzz(ufsecp_ctx* ctx) {
}
}
// ═══════════════════════════════════════════════════════════════════════════
// ===========================================================================
// Suite [6]: BIP32 Path Parser Fuzz
// ═══════════════════════════════════════════════════════════════════════════
// ===========================================================================
static void suite_6_bip32_path_fuzz(ufsecp_ctx* ctx) {
std::printf("\n[6] BIP32 Path Parser Fuzz\n");
@ -533,9 +533,9 @@ static void suite_6_bip32_path_fuzz(ufsecp_ctx* ctx) {
}
}
// ═══════════════════════════════════════════════════════════════════════════
// ===========================================================================
// Suite [7]: BIP32 Derive (single-step) Fuzz
// ═══════════════════════════════════════════════════════════════════════════
// ===========================================================================
static void suite_7_bip32_derive_fuzz(ufsecp_ctx* ctx) {
std::printf("\n[7] BIP32 Derive (single-step) Fuzz\n");
@ -587,9 +587,9 @@ static void suite_7_bip32_derive_fuzz(ufsecp_ctx* ctx) {
}
}
// ═══════════════════════════════════════════════════════════════════════════
// ===========================================================================
// Suite [8]: FFI Context Lifecycle Stress
// ═══════════════════════════════════════════════════════════════════════════
// ===========================================================================
static void suite_8_ffi_context_stress() {
std::printf("\n[8] FFI Context Lifecycle Stress\n");
@ -639,9 +639,9 @@ static void suite_8_ffi_context_stress() {
}
}
// ═══════════════════════════════════════════════════════════════════════════
// ===========================================================================
// Suite [9]: FFI ECDSA Sign/Verify Boundary Fuzz
// ═══════════════════════════════════════════════════════════════════════════
// ===========================================================================
static void suite_9_ffi_ecdsa_boundary(ufsecp_ctx* ctx) {
std::printf("\n[9] FFI ECDSA Sign/Verify Boundary Fuzz\n");
@ -697,9 +697,9 @@ static void suite_9_ffi_ecdsa_boundary(ufsecp_ctx* ctx) {
}
}
// ═══════════════════════════════════════════════════════════════════════════
// ===========================================================================
// Suite [10]: FFI Schnorr Sign/Verify Boundary Fuzz
// ═══════════════════════════════════════════════════════════════════════════
// ===========================================================================
static void suite_10_ffi_schnorr_boundary(ufsecp_ctx* ctx) {
std::printf("\n[10] FFI Schnorr Sign/Verify Boundary Fuzz\n");
@ -746,9 +746,9 @@ static void suite_10_ffi_schnorr_boundary(ufsecp_ctx* ctx) {
}
}
// ═══════════════════════════════════════════════════════════════════════════
// ===========================================================================
// Suite [11]: FFI ECDH + Tweaking Boundary
// ═══════════════════════════════════════════════════════════════════════════
// ===========================================================================
static void suite_11_ffi_ecdh_tweak(ufsecp_ctx* ctx) {
std::printf("\n[11] FFI ECDH + Tweaking Boundary Fuzz\n");
@ -805,9 +805,9 @@ static void suite_11_ffi_ecdh_tweak(ufsecp_ctx* ctx) {
}
}
// ═══════════════════════════════════════════════════════════════════════════
// ===========================================================================
// Suite [12]: FFI Taproot Output Key Boundary
// ═══════════════════════════════════════════════════════════════════════════
// ===========================================================================
static void suite_12_ffi_taproot_boundary(ufsecp_ctx* ctx) {
std::printf("\n[12] FFI Taproot Output Key Boundary Fuzz\n");
@ -864,9 +864,9 @@ static void suite_12_ffi_taproot_boundary(ufsecp_ctx* ctx) {
}
}
// ═══════════════════════════════════════════════════════════════════════════
// ===========================================================================
// Suite [13]: FFI Error Inspection
// ═══════════════════════════════════════════════════════════════════════════
// ===========================================================================
static void suite_13_ffi_error_inspection(ufsecp_ctx* ctx) {
std::printf("\n[13] FFI Error Inspection\n");
@ -904,9 +904,9 @@ static void suite_13_ffi_error_inspection(ufsecp_ctx* ctx) {
}
}
// ═══════════════════════════════════════════════════════════════════════════
// ===========================================================================
// _run() entry point for unified audit runner
// ═══════════════════════════════════════════════════════════════════════════
// ===========================================================================
int test_fuzz_address_bip32_ffi_run() {
g_pass = 0; g_fail = 0; g_crash = 0;
@ -936,9 +936,9 @@ int test_fuzz_address_bip32_ffi_run() {
return (g_fail > 0 || g_crash > 0) ? 1 : 0;
}
// ═══════════════════════════════════════════════════════════════════════════
// ===========================================================================
// Main (standalone only)
// ═══════════════════════════════════════════════════════════════════════════
// ===========================================================================
#ifndef UNIFIED_AUDIT_RUNNER
int main() {
@ -968,9 +968,9 @@ int main() {
ufsecp_ctx_destroy(ctx);
std::printf("\n════════════════════════════════════════════════════\n");
std::printf("\n====================================================\n");
std::printf(" PASSED: %d FAILED: %d CRASHES: %d\n", g_pass, g_fail, g_crash);
std::printf("════════════════════════════════════════════════════\n");
std::printf("====================================================\n");
return g_fail > 0 ? 1 : 0;
}
#endif // UNIFIED_AUDIT_RUNNER

52
audit/test_fuzz_parsers.cpp
View File

@ -4,7 +4,7 @@
//
// Deterministic pseudo-fuzz: generates random & adversarial byte sequences and
// feeds them to the C API parsers. Contract: parsers must either succeed with
// valid output or return an error code — never crash, hang, or corrupt memory.
// valid output or return an error code -- never crash, hang, or corrupt memory.
//
// Covers roadmap tasks:
// 2.3.1 DER signature parsing fuzz
@ -32,7 +32,7 @@
#include "secp256k1/ecdsa.hpp"
#include "secp256k1/scalar.hpp"
// ── Infrastructure ──────────────────────────────────────────────────────────
// -- Infrastructure ----------------------------------------------------------
static int g_pass = 0;
static int g_fail = 0;
@ -71,7 +71,7 @@ static std::array<uint8_t, 32> random32() {
return out;
}
// ── Test 1: DER Parsing — Random Bytes ──────────────────────────────────────
// -- Test 1: DER Parsing -- Random Bytes --------------------------------------
static void test_der_random(ufsecp_ctx* ctx) {
const int N = 100000;
@ -91,7 +91,7 @@ static void test_der_random(ufsecp_ctx* ctx) {
N, accepted, N - accepted);
}
// ── Test 2: DER Parsing — Adversarial Inputs ────────────────────────────────
// -- Test 2: DER Parsing -- Adversarial Inputs --------------------------------
static void test_der_adversarial(ufsecp_ctx* ctx) {
std::printf("[2] DER Parsing: Adversarial Inputs\n");
@ -152,7 +152,7 @@ static void test_der_adversarial(ufsecp_ctx* ctx) {
uint8_t zeros[] = {0x30, 0x06, 0x02, 0x01, 0x00, 0x02, 0x01, 0x00};
// Parser should accept (structural parse OK); verification would fail later
ufsecp_error_t err = ufsecp_ecdsa_sig_from_der(ctx, zeros, 8, sig64);
// Either accepted or rejected is fine — no crash
// Either accepted or rejected is fine -- no crash
++g_pass;
}
@ -175,11 +175,11 @@ static void test_der_adversarial(ufsecp_ctx* ctx) {
std::printf(" %d checks OK\n\n", g_pass);
}
// ── Test 3: DER Round-Trip ──────────────────────────────────────────────────
// -- Test 3: DER Round-Trip --------------------------------------------------
static void test_der_roundtrip(ufsecp_ctx* ctx) {
const int N = 50000;
std::printf("[3] DER Round-Trip: Compact → DER → Compact (%d rounds)\n", N);
std::printf("[3] DER Round-Trip: Compact -> DER -> Compact (%d rounds)\n", N);
for (int i = 0; i < N; ++i) {
// Generate valid signature via actual signing
@ -190,13 +190,13 @@ static void test_der_roundtrip(ufsecp_ctx* ctx) {
ufsecp_error_t err = ufsecp_ecdsa_sign(ctx, msg.data(), sk.data(), sig64);
if (err != UFSECP_OK) continue; // invalid key, skip
// Compact → DER
// Compact -> DER
uint8_t der[72] = {};
size_t der_len = 72;
err = ufsecp_ecdsa_sig_to_der(ctx, sig64, der, &der_len);
CHECK(err == UFSECP_OK, "to_der OK");
// DER → Compact
// DER -> Compact
uint8_t sig64_back[64] = {};
err = ufsecp_ecdsa_sig_from_der(ctx, der, der_len, sig64_back);
CHECK(err == UFSECP_OK, "from_der OK");
@ -207,7 +207,7 @@ static void test_der_roundtrip(ufsecp_ctx* ctx) {
std::printf(" %d checks OK\n\n", g_pass);
}
// ── Test 4: Schnorr Signature — Random Bytes ────────────────────────────────
// -- Test 4: Schnorr Signature -- Random Bytes --------------------------------
static void test_schnorr_random(ufsecp_ctx* ctx) {
const int N = 100000;
@ -216,7 +216,7 @@ static void test_schnorr_random(ufsecp_ctx* ctx) {
for (int i = 0; i < N; ++i) {
auto msg = random32();
auto sig = random32(); // only 32 bytes — incomplete, but still shouldn't crash
auto sig = random32(); // only 32 bytes -- incomplete, but still shouldn't crash
auto pk = random32();
// Feed random 64-byte sig (two random32 concatenated)
@ -234,11 +234,11 @@ static void test_schnorr_random(ufsecp_ctx* ctx) {
N, accepted, N - accepted);
}
// ── Test 5: Schnorr Round-Trip ──────────────────────────────────────────────
// -- Test 5: Schnorr Round-Trip ----------------------------------------------
static void test_schnorr_roundtrip(ufsecp_ctx* ctx) {
const int N = 10000;
std::printf("[5] Schnorr Round-Trip: Sign → Verify (%d rounds)\n", N);
std::printf("[5] Schnorr Round-Trip: Sign -> Verify (%d rounds)\n", N);
for (int i = 0; i < N; ++i) {
auto sk = random32();
@ -259,7 +259,7 @@ static void test_schnorr_roundtrip(ufsecp_ctx* ctx) {
err = ufsecp_schnorr_verify(ctx, msg.data(), sig64, xonly);
CHECK(err == UFSECP_OK, "schnorr verify own sig");
// Flip one bit in signature → must fail
// Flip one bit in signature -> must fail
sig64[rng() % 64] ^= static_cast<uint8_t>(1u << (rng() % 8));
err = ufsecp_schnorr_verify(ctx, msg.data(), sig64, xonly);
CHECK(err != UFSECP_OK, "schnorr verify bit-flip rejected");
@ -267,7 +267,7 @@ static void test_schnorr_roundtrip(ufsecp_ctx* ctx) {
std::printf(" %d checks OK\n\n", g_pass);
}
// ── Test 6: Pubkey Parse — Random Bytes ─────────────────────────────────────
// -- Test 6: Pubkey Parse -- Random Bytes -------------------------------------
static void test_pubkey_parse_random(ufsecp_ctx* ctx) {
const int N = 100000;
@ -300,11 +300,11 @@ static void test_pubkey_parse_random(ufsecp_ctx* ctx) {
N, accepted, N - accepted);
}
// ── Test 7: Pubkey Round-Trip ───────────────────────────────────────────────
// -- Test 7: Pubkey Round-Trip -----------------------------------------------
static void test_pubkey_roundtrip(ufsecp_ctx* ctx) {
const int N = 10000;
std::printf("[7] Pubkey Round-Trip: Create → Parse (%d rounds)\n", N);
std::printf("[7] Pubkey Round-Trip: Create -> Parse (%d rounds)\n", N);
for (int i = 0; i < N; ++i) {
auto sk = random32();
@ -328,12 +328,12 @@ static void test_pubkey_roundtrip(ufsecp_ctx* ctx) {
err = ufsecp_pubkey_parse(ctx, pk65, 65, pk33_from65);
CHECK(err == UFSECP_OK, "parse uncompressed OK");
CHECK(std::memcmp(pk33, pk33_from65, 33) == 0,
"uncompressed → compressed matches");
"uncompressed -> compressed matches");
}
std::printf(" %d checks OK\n\n", g_pass);
}
// ── Test 8: Pubkey Adversarial ──────────────────────────────────────────────
// -- Test 8: Pubkey Adversarial ----------------------------------------------
static void test_pubkey_adversarial(ufsecp_ctx* ctx) {
std::printf("[8] Pubkey Parse: Adversarial Inputs\n");
@ -399,7 +399,7 @@ static void test_pubkey_adversarial(ufsecp_ctx* ctx) {
std::printf(" %d checks OK\n\n", g_pass);
}
// ── Test 9: ECDSA Verify — Random Garbage ───────────────────────────────────
// -- Test 9: ECDSA Verify -- Random Garbage -----------------------------------
static void test_ecdsa_verify_random(ufsecp_ctx* ctx) {
const int N = 50000;
@ -431,7 +431,7 @@ static void test_ecdsa_verify_random(ufsecp_ctx* ctx) {
N, accepted);
}
// ── _run() entry point for unified audit runner ─────────────────────────────
// -- _run() entry point for unified audit runner -----------------------------
int test_fuzz_parsers_run() {
g_pass = 0; g_fail = 0;
@ -457,15 +457,15 @@ int test_fuzz_parsers_run() {
return g_fail > 0 ? 1 : 0;
}
// ── Main (standalone) ───────────────────────────────────────────────────────
// -- Main (standalone) -------------------------------------------------------
#ifndef UNIFIED_AUDIT_RUNNER
int main(int argc, char* argv[]) {
std::printf(
"════════════════════════════════════════════════════════════\n"
"============================================================\n"
" Parser Fuzz Tests (DER + Schnorr + Pubkey)\n"
" Seed: 0xDEADBEEF (deterministic)\n"
"════════════════════════════════════════════════════════════\n\n");
"============================================================\n\n");
ufsecp_ctx* ctx = nullptr;
ufsecp_error_t err = ufsecp_ctx_create(&ctx);
@ -488,9 +488,9 @@ int main(int argc, char* argv[]) {
ufsecp_ctx_destroy(ctx);
std::printf(
"\n════════════════════════════════════════════════════════════\n"
"\n============================================================\n"
" TOTAL: %d passed, %d failed\n"
"════════════════════════════════════════════════════════════\n",
"============================================================\n",
g_pass, g_fail);
return g_fail > 0 ? 1 : 0;

72
audit/test_musig2_frost.cpp
View File

@ -1,5 +1,5 @@
// ============================================================================
// MuSig2 + FROST Protocol Tests (Phase II Tasks 2.1.1–2.2.2)
// MuSig2 + FROST Protocol Tests (Phase II Tasks 2.1.1-2.2.2)
// ============================================================================
// - MuSig2 (BIP-327 style): key aggregation, nonce flow, partial signing,
// partial verification, signature aggregation, Schnorr verify.
@ -33,7 +33,7 @@ using secp256k1::fast::Scalar;
using secp256k1::fast::Point;
using secp256k1::fast::FieldElement;
// ── Minimal test harness ─────────────────────────────────────────────────────
// -- Minimal test harness -----------------------------------------------------
static int g_pass = 0;
static int g_fail = 0;
@ -45,7 +45,7 @@ static int g_fail = 0;
} \
} while(0)
// ── Helpers ──────────────────────────────────────────────────────────────────
// -- Helpers ------------------------------------------------------------------
static std::array<uint8_t, 32> random32(std::mt19937_64& rng) {
std::array<uint8_t, 32> out{};
@ -71,11 +71,11 @@ static std::array<uint8_t, 32> xonly_pubkey(const Scalar& sk) {
return P.x().to_bytes();
}
// ═══════════════════════════════════════════════════════════════════════════════
// ===============================================================================
// MuSig2 Tests
// ═══════════════════════════════════════════════════════════════════════════════
// ===============================================================================
// ── Test 1: Key Aggregation — Determinism ────────────────────────────────────
// -- Test 1: Key Aggregation -- Determinism ------------------------------------
static void test_musig2_key_agg_determinism() {
std::printf("[1] MuSig2 Key Aggregation: Determinism\n");
@ -108,7 +108,7 @@ static void test_musig2_key_agg_determinism() {
std::printf(" %d checks OK\n\n", g_pass);
}
// ── Test 2: Key Aggregation — Ordering Matters ──────────────────────────────
// -- Test 2: Key Aggregation -- Ordering Matters ------------------------------
static void test_musig2_key_agg_ordering() {
std::printf("[2] MuSig2 Key Aggregation: Ordering Matters\n");
@ -139,7 +139,7 @@ static void test_musig2_key_agg_ordering() {
std::printf(" %d checks OK\n\n", g_pass);
}
// ── Test 3: Key Aggregation — Duplicate Keys ────────────────────────────────
// -- Test 3: Key Aggregation -- Duplicate Keys --------------------------------
static void test_musig2_key_agg_duplicates() {
std::printf("[3] MuSig2 Key Aggregation: Duplicate Keys\n");
@ -166,7 +166,7 @@ static void test_musig2_key_agg_duplicates() {
std::printf(" %d checks OK\n\n", g_pass);
}
// ── Test 4: MuSig2 Full Round-Trip (parametric N signers) ───────────────────
// -- Test 4: MuSig2 Full Round-Trip (parametric N signers) -------------------
static void test_musig2_round_trip(int n_signers, const char* label) {
std::printf("[4.%s] MuSig2 Full Round-Trip: %d signers\n", label, n_signers);
@ -233,7 +233,7 @@ static void test_musig2_round_trip(int n_signers, const char* label) {
std::printf(" %d checks OK\n\n", g_pass);
}
// ── Test 5: MuSig2 Wrong Signer — Expect Failure ───────────────────────────
// -- Test 5: MuSig2 Wrong Signer -- Expect Failure ---------------------------
static void test_musig2_wrong_signer() {
std::printf("[5] MuSig2: Wrong Partial Sig Fails Verify\n");
@ -268,7 +268,7 @@ static void test_musig2_wrong_signer() {
auto s_0 = secp256k1::musig2_partial_sign(
sec_nonces[0], sks[0], key_agg, session, 0);
// Verify s_0 against signer 1's nonce/pubkey — should fail
// Verify s_0 against signer 1's nonce/pubkey -- should fail
bool bad_pv = secp256k1::musig2_partial_verify(
s_0, pub_nonces[1], pks[1], key_agg, session, 1);
CHECK(!bad_pv, "wrong signer partial verify fails");
@ -277,7 +277,7 @@ static void test_musig2_wrong_signer() {
std::printf(" %d checks OK\n\n", g_pass);
}
// ── Test 6: MuSig2 Bit-Flip Invalidates Signature ──────────────────────────
// -- Test 6: MuSig2 Bit-Flip Invalidates Signature --------------------------
static void test_musig2_bitflip() {
std::printf("[6] MuSig2: Bit-Flip Invalidates Final Signature\n");
@ -334,11 +334,11 @@ static void test_musig2_bitflip() {
std::printf(" %d checks OK\n\n", g_pass);
}
// ═══════════════════════════════════════════════════════════════════════════════
// ===============================================================================
// FROST Tests
// ═══════════════════════════════════════════════════════════════════════════════
// ===============================================================================
// ── Test 7: FROST DKG — 2-of-3 ─────────────────────────────────────────────
// -- Test 7: FROST DKG -- 2-of-3 ---------------------------------------------
static void test_frost_dkg(uint32_t threshold, uint32_t n_participants,
const char* label) {
@ -399,7 +399,7 @@ static void test_frost_dkg(uint32_t threshold, uint32_t n_participants,
std::printf(" %d checks OK\n\n", g_pass);
}
// ── Test 8: FROST Full Signing Round-Trip ───────────────────────────────────
// -- Test 8: FROST Full Signing Round-Trip -----------------------------------
static void test_frost_signing(uint32_t threshold, uint32_t n_participants,
const char* label) {
@ -409,7 +409,7 @@ static void test_frost_signing(uint32_t threshold, uint32_t n_participants,
const int ROUNDS = 10;
for (int round = 0; round < ROUNDS; ++round) {
// ── DKG ──────────────────────────────────────────────────────────
// -- DKG ----------------------------------------------------------
std::vector<secp256k1::FrostCommitment> all_commitments;
std::vector<std::vector<secp256k1::FrostShare>> share_matrix;
@ -433,7 +433,7 @@ static void test_frost_signing(uint32_t threshold, uint32_t n_participants,
key_packages.push_back(pkg);
}
// ── Select t signers (first t participants) ─────────────────────
// -- Select t signers (first t participants) ---------------------
std::vector<uint32_t> signer_indices;
for (uint32_t i = 0; i < threshold; ++i) {
signer_indices.push_back(i);
@ -441,7 +441,7 @@ static void test_frost_signing(uint32_t threshold, uint32_t n_participants,
auto msg = random32(rng);
// ── Nonce generation ────────────────────────────────────────────
// -- Nonce generation --------------------------------------------
std::vector<secp256k1::FrostNonce> nonces;
std::vector<secp256k1::FrostNonceCommitment> nonce_commitments;
@ -453,7 +453,7 @@ static void test_frost_signing(uint32_t threshold, uint32_t n_participants,
nonce_commitments.push_back(commitment);
}
// ── Partial signing ─────────────────────────────────────────────
// -- Partial signing ---------------------------------------------
std::vector<secp256k1::FrostPartialSig> partial_sigs;
for (std::size_t si = 0; si < signer_indices.size(); ++si) {
uint32_t idx = signer_indices[si];
@ -462,7 +462,7 @@ static void test_frost_signing(uint32_t threshold, uint32_t n_participants,
partial_sigs.push_back(psig);
}
// ── Partial verification ────────────────────────────────────────
// -- Partial verification ----------------------------------------
for (std::size_t si = 0; si < signer_indices.size(); ++si) {
uint32_t idx = signer_indices[si];
bool pv = secp256k1::frost_verify_partial(
@ -474,17 +474,17 @@ static void test_frost_signing(uint32_t threshold, uint32_t n_participants,
CHECK(pv, "FROST partial sig verifies");
}
// ── Aggregation ─────────────────────────────────────────────────
// -- Aggregation -------------------------------------------------
auto final_sig = secp256k1::frost_aggregate(
partial_sigs, nonce_commitments,
key_packages[0].group_public_key, msg);
// ── Schnorr verify against group public key ─────────────────────
// -- Schnorr verify against group public key ---------------------
auto gpk_x = key_packages[0].group_public_key.x().to_bytes();
// Ensure we're using even-Y version for BIP-340
auto gpk_y = key_packages[0].group_public_key.y().to_bytes();
if (gpk_y[31] & 1) {
// Negate — but x stays the same for x-only
// Negate -- but x stays the same for x-only
}
bool ok = secp256k1::schnorr_verify(gpk_x, msg, final_sig);
CHECK(ok, "FROST aggregated sig passes schnorr_verify");
@ -493,7 +493,7 @@ static void test_frost_signing(uint32_t threshold, uint32_t n_participants,
std::printf(" %d checks OK\n\n", g_pass);
}
// ── Test 9: FROST — Different Signer Subsets ────────────────────────────────
// -- Test 9: FROST -- Different Signer Subsets --------------------------------
static void test_frost_different_subsets() {
std::printf("[9] FROST: Different 2-of-3 Subsets All Valid\n");
@ -562,7 +562,7 @@ static void test_frost_different_subsets() {
std::printf(" %d checks OK\n\n", g_pass);
}
// ── Test 10: FROST — Bit-Flip Invalidates Signature ─────────────────────────
// -- Test 10: FROST -- Bit-Flip Invalidates Signature -------------------------
static void test_frost_bitflip() {
std::printf("[10] FROST: Bit-Flip Invalidates Signature\n");
@ -615,7 +615,7 @@ static void test_frost_bitflip() {
std::printf(" %d checks OK\n\n", g_pass);
}
// ── Test 11: FROST — Wrong Partial Sig Fails ────────────────────────────────
// -- Test 11: FROST -- Wrong Partial Sig Fails --------------------------------
static void test_frost_wrong_partial() {
std::printf("[11] FROST: Wrong Partial Sig Fails Verify\n");
@ -650,7 +650,7 @@ static void test_frost_wrong_partial() {
auto ps1 = secp256k1::frost_sign(pkgs[0], n1, msg, ncs);
// Verify ps1 against signer 2's verification share — should fail
// Verify ps1 against signer 2's verification share -- should fail
bool bad = secp256k1::frost_verify_partial(
ps1, nc1, pkgs[1].verification_share, msg, ncs, gpk);
CHECK(!bad, "wrong verification share -> partial verify fails");
@ -659,9 +659,9 @@ static void test_frost_wrong_partial() {
std::printf(" %d checks OK\n\n", g_pass);
}
// ═══════════════════════════════════════════════════════════════════════════════
// ===============================================================================
// _run() entry point for unified audit runner
// ═══════════════════════════════════════════════════════════════════════════════
// ===============================================================================
int test_musig2_frost_protocol_run() {
g_pass = 0; g_fail = 0;
@ -686,15 +686,15 @@ int test_musig2_frost_protocol_run() {
return g_fail > 0 ? 1 : 0;
}
// ═══════════════════════════════════════════════════════════════════════════════
// ===============================================================================
// Main (standalone only)
// ═══════════════════════════════════════════════════════════════════════════════
// ===============================================================================
#ifndef UNIFIED_AUDIT_RUNNER
int main() {
std::printf("═══════════════════════════════════════════════════\n");
std::printf("===================================================\n");
std::printf(" MuSig2 + FROST Protocol Tests\n");
std::printf("═══════════════════════════════════════════════════\n\n");
std::printf("===================================================\n\n");
// MuSig2
test_musig2_key_agg_determinism(); // [1]
@ -716,9 +716,9 @@ int main() {
test_frost_wrong_partial(); // [11]
// Summary
std::printf("══════════════════════════════════════════════════════════════════════\n");
std::printf("======================================================================\n");
std::printf("TOTAL: %d passed, %d failed\n", g_pass, g_fail);
std::printf("══════════════════════════════════════════════════════════════════════\n");
std::printf("======================================================================\n");
return g_fail > 0 ? 1 : 0;
}

60
audit/test_musig2_frost_advanced.cpp
View File

@ -26,7 +26,7 @@ using secp256k1::fast::Scalar;
using secp256k1::fast::Point;
using secp256k1::fast::FieldElement;
// ── Minimal test harness ─────────────────────────────────────────────────────
// -- Minimal test harness -----------------------------------------------------
static int g_pass = 0;
static int g_fail = 0;
@ -38,7 +38,7 @@ static int g_fail = 0;
} \
} while(0)
// ── Helpers ──────────────────────────────────────────────────────────────────
// -- Helpers ------------------------------------------------------------------
static std::array<uint8_t, 32> random32(std::mt19937_64& rng) {
std::array<uint8_t, 32> out{};
@ -96,9 +96,9 @@ static bool musig2_full_sign_verify(
return secp256k1::schnorr_verify(key_agg.Q_x, msg, ssig);
}
// ═══════════════════════════════════════════════════════════════════════════════
// ===============================================================================
// Task 2.1.3: Rogue-Key Resistance Tests
// ═══════════════════════════════════════════════════════════════════════════════
// ===============================================================================
// In naive multi-sig, an attacker could choose rogue_pk = target - honest_pk
// so that agg_pk = honest_pk + rogue_pk = target. MuSig2's key coefficient
// mechanism (a_i) prevents this by weighting each key differently.
@ -194,14 +194,14 @@ static void test_musig2_key_coefficient_binding() {
std::printf(" %d checks OK\n\n", g_pass);
}
// ═══════════════════════════════════════════════════════════════════════════════
// ===============================================================================
// Task 2.1.4: Transcript Binding Tests
// ═══════════════════════════════════════════════════════════════════════════════
// ===============================================================================
// Different messages → different signatures
// Different messages -> different signatures
static void test_musig2_message_binding() {
std::printf("[3] MuSig2: Different Messages → Different Signatures\n");
std::printf("[3] MuSig2: Different Messages -> Different Signatures\n");
std::mt19937_64 rng(0xF5650001);
const int N = 20;
@ -246,7 +246,7 @@ static void test_musig2_message_binding() {
// Challenges must differ
CHECK(sess1.e.to_bytes() != sess2.e.to_bytes(),
"different messages → different challenges");
"different messages -> different challenges");
// Each signature verifies against its own message
std::vector<Scalar> ps1, ps2;
@ -270,10 +270,10 @@ static void test_musig2_message_binding() {
std::printf(" %d checks OK\n\n", g_pass);
}
// Nonce binding: same keys+message but different nonces → different R, same challenge structure
// Nonce binding: same keys+message but different nonces -> different R, same challenge structure
static void test_musig2_nonce_binding() {
std::printf("[4] MuSig2: Nonce Binding (fresh nonces → different R)\n");
std::printf("[4] MuSig2: Nonce Binding (fresh nonces -> different R)\n");
std::mt19937_64 rng(0xA0CEFACE);
const int N = 20;
@ -314,7 +314,7 @@ static void test_musig2_nonce_binding() {
// R should differ (different nonces)
auto R_a = sess_a.R.x().to_bytes();
auto R_b = sess_b.R.x().to_bytes();
CHECK(R_a != R_b, "different nonces → different R");
CHECK(R_a != R_b, "different nonces -> different R");
// Both signatures should be valid
auto s_a = secp256k1::SchnorrSignature::from_bytes(sig_a);
@ -326,9 +326,9 @@ static void test_musig2_nonce_binding() {
std::printf(" %d checks OK\n\n", g_pass);
}
// ═══════════════════════════════════════════════════════════════════════════════
// ===============================================================================
// Task 2.1.5: Fault Injection
// ═══════════════════════════════════════════════════════════════════════════════
// ===============================================================================
static void test_musig2_fault_injection() {
std::printf("[5] MuSig2: Fault Injection (wrong key in partial sign)\n");
@ -380,14 +380,14 @@ static void test_musig2_fault_injection() {
std::printf(" %d checks OK\n\n", g_pass);
}
// ═══════════════════════════════════════════════════════════════════════════════
// ===============================================================================
// Task 2.2.3: Malicious FROST Participant Simulation
// ═══════════════════════════════════════════════════════════════════════════════
// ===============================================================================
// Scenario A: Participant sends tampered share during DKG
static void test_frost_bad_share_dkg() {
std::printf("[6] FROST: Malicious Participant — Bad DKG Share\n");
std::printf("[6] FROST: Malicious Participant -- Bad DKG Share\n");
std::mt19937_64 rng(0xBAD50A8E);
const int N = 10;
@ -426,7 +426,7 @@ static void test_frost_bad_share_dkg() {
// Scenario B: Participant sends bad partial signature during signing
static void test_frost_bad_partial_sig() {
std::printf("[7] FROST: Malicious Participant — Bad Partial Sig\n");
std::printf("[7] FROST: Malicious Participant -- Bad Partial Sig\n");
std::mt19937_64 rng(0xBAD51600);
const int N = 10;
@ -489,14 +489,14 @@ static void test_frost_bad_partial_sig() {
std::printf(" %d checks OK\n\n", g_pass);
}
// ═══════════════════════════════════════════════════════════════════════════════
// ===============================================================================
// Task 2.2.4: FROST Transcript Binding
// ═══════════════════════════════════════════════════════════════════════════════
// ===============================================================================
// Different messages produce different FROST signatures
static void test_frost_message_binding() {
std::printf("[8] FROST: Message Binding (different messages → different sigs)\n");
std::printf("[8] FROST: Message Binding (different messages -> different sigs)\n");
std::mt19937_64 rng(0xF5B1D000);
const int N = 10;
@ -603,16 +603,16 @@ static void test_frost_signer_set_binding() {
for (int j = i + 1; j < 3; ++j) {
bool r_same = sigs[i].r == sigs[j].r;
bool s_same = sigs[i].s.to_bytes() == sigs[j].s.to_bytes();
CHECK(!r_same || !s_same, "different subsets → different sigs");
CHECK(!r_same || !s_same, "different subsets -> different sigs");
}
}
std::printf(" %d checks OK\n\n", g_pass);
}
// ═══════════════════════════════════════════════════════════════════════════════
// ===============================================================================
// _run() entry point for unified audit runner
// ═══════════════════════════════════════════════════════════════════════════════
// ===============================================================================
int test_musig2_frost_advanced_run() {
g_pass = 0; g_fail = 0;
@ -630,15 +630,15 @@ int test_musig2_frost_advanced_run() {
return g_fail > 0 ? 1 : 0;
}
// ═══════════════════════════════════════════════════════════════════════════════
// ===============================================================================
// Main (standalone only)
// ═══════════════════════════════════════════════════════════════════════════════
// ===============================================================================
#ifndef UNIFIED_AUDIT_RUNNER
int main() {
std::printf("═══════════════════════════════════════════════════\n");
std::printf("===================================================\n");
std::printf(" MuSig2 + FROST Advanced Protocol Tests\n");
std::printf("═══════════════════════════════════════════════════\n\n");
std::printf("===================================================\n\n");
// 2.1.3: Rogue-key resistance
test_musig2_rogue_key_resistance(); // [1]
@ -660,9 +660,9 @@ int main() {
test_frost_signer_set_binding(); // [9]
// Summary
std::printf("══════════════════════════════════════════════════════════════════════\n");
std::printf("======================================================================\n");
std::printf("TOTAL: %d passed, %d failed\n", g_pass, g_fail);
std::printf("══════════════════════════════════════════════════════════════════════\n");
std::printf("======================================================================\n");
return g_fail > 0 ? 1 : 0;
}

96
audit/unified_audit_runner.cpp
View File

@ -2,8 +2,8 @@
// Unified Audit Runner -- UltrafastSecp256k1
// ============================================================================
//
// ერთიანი სელფ-აუდიტ აპლიკაცია. ერთი ბინარი ყველა პლატფორმისთვის.
// ბილდავ, გაუშვებ, ვალიდაციას გაივლის ყველა ტესტი, რეპორტს შეინახავს.
// Unified self-audit application. Single binary for all platforms.
// Build, run, validate all tests, save report.
//
// Single binary that runs ALL library tests and produces a structured
// JSON + text audit report. Build once, run on any platform.
@ -14,8 +14,8 @@
// unified_audit_runner --report-dir <dir> # write reports to <dir>
//
// Generates:
// audit_report.json — machine-readable structured result
// audit_report.txt — human-readable summary
// audit_report.json -- machine-readable structured result
// audit_report.txt -- human-readable summary
// ============================================================================
#define UNIFIED_AUDIT_RUNNER // Guard standalone main() in test modules
@ -39,7 +39,7 @@
using namespace secp256k1::fast;
// ============================================================================
// Forward declarations — selftest modules (from run_selftest.cpp sources)
// Forward declarations -- selftest modules (from run_selftest.cpp sources)
// ============================================================================
int test_large_scalar_multiplication_run();
int test_mul_run();
@ -64,7 +64,7 @@ int test_rfc6979_vectors_run();
int test_ecc_properties_run();
// ============================================================================
// Forward declarations — additional standalone test _run() functions
// Forward declarations -- additional standalone test _run() functions
// ============================================================================
int test_carry_propagation_run();
int test_fault_injection_run();
@ -76,21 +76,21 @@ int test_ct_sidechannel_smoke_run();
int test_differential_run();
// ============================================================================
// Forward declarations — MuSig2 / FROST protocol tests
// Forward declarations -- MuSig2 / FROST protocol tests
// ============================================================================
int test_musig2_frost_protocol_run();
int test_musig2_frost_advanced_run();
int test_frost_kat_run();
// ============================================================================
// Forward declarations — adversarial / fuzz tests
// Forward declarations -- adversarial / fuzz tests
// ============================================================================
int test_audit_fuzz_run();
int test_fuzz_parsers_run();
int test_fuzz_address_bip32_ffi_run();
// ============================================================================
// Forward declarations — deep audit modules
// Forward declarations -- deep audit modules
// ============================================================================
int audit_field_run(); // Section I.1: Field Fp correctness
int audit_scalar_run(); // Section I.2: Scalar Zn correctness
@ -101,7 +101,7 @@ int audit_security_run(); // Section V: Security hardening
int audit_perf_run(); // Section IV: Performance validation
// ============================================================================
// Forward declarations — field representation tests
// Forward declarations -- field representation tests
// ============================================================================
#ifdef __SIZEOF_INT128__
int test_field_52_main(); // 5x52 lazy-reduction (requires __uint128_t)
@ -109,21 +109,21 @@ int test_field_52_main(); // 5x52 lazy-reduction (requires __uint128_t)
int test_field_26_main(); // 10x26 lazy-reduction
// ============================================================================
// Forward declarations — diagnostics
// Forward declarations -- diagnostics
// ============================================================================
int diag_scalar_mul_run();
// ============================================================================
// Report section IDs — 8 audit categories
// Report section IDs -- 8 audit categories
// ============================================================================
// 1. math_invariants — Mathematical Invariants (Fp, Zn, Group Laws)
// 2. ct_analysis — Constant-Time / Side-Channel Analysis
// 3. differential — Differential & Cross-Library Testing
// 4. standard_vectors — Standard Test Vectors (BIP-340, RFC-6979, BIP-32)
// 5. fuzzing — Fuzzing & Adversarial Attack Resilience
// 6. protocol_security — Protocol Security (ECDSA, Schnorr, MuSig2, FROST)
// 7. memory_safety — ABI & Memory Safety (sanitizer, zeroization)
// 8. performance — Performance Validation & Regression
// 1. math_invariants -- Mathematical Invariants (Fp, Zn, Group Laws)
// 2. ct_analysis -- Constant-Time / Side-Channel Analysis
// 3. differential -- Differential & Cross-Library Testing
// 4. standard_vectors -- Standard Test Vectors (BIP-340, RFC-6979, BIP-32)
// 5. fuzzing -- Fuzzing & Adversarial Attack Resilience
// 6. protocol_security -- Protocol Security (ECDSA, Schnorr, MuSig2, FROST)
// 7. memory_safety -- ABI & Memory Safety (sanitizer, zeroization)
// 8. performance -- Performance Validation & Regression
// ============================================================================
struct AuditModule {
@ -161,9 +161,9 @@ static const SectionInfo SECTIONS[] = {
static constexpr int NUM_SECTIONS = sizeof(SECTIONS) / sizeof(SECTIONS[0]);
static const AuditModule ALL_MODULES[] = {
// ═══════════════════════════════════════════════════════════════════
// ===================================================================
// Section 1: Mathematical Invariants (Fp, Zn, Group Laws)
// ═══════════════════════════════════════════════════════════════════
// ===================================================================
{ "audit_field", "Field Fp deep audit (add/mul/inv/sqrt/batch)", "math_invariants", audit_field_run },
{ "audit_scalar", "Scalar Zn deep audit (mod/GLV/edge/inv)", "math_invariants", audit_scalar_run },
{ "audit_point", "Point ops deep audit (Jac/affine/sigs)", "math_invariants", audit_point_run },
@ -180,41 +180,41 @@ static const AuditModule ALL_MODULES[] = {
#endif
{ "field_26", "FieldElement26 (10x26) vs 4x64", "math_invariants", test_field_26_main },
// ═══════════════════════════════════════════════════════════════════
// ===================================================================
// Section 2: Constant-Time / Side-Channel Analysis
// ═══════════════════════════════════════════════════════════════════
// ===================================================================
{ "audit_ct", "CT deep audit (masks/cmov/cswap/timing)", "ct_analysis", audit_ct_run },
{ "ct", "Constant-time layer", "ct_analysis", test_ct_run },
{ "ct_equivalence", "FAST == CT equivalence", "ct_analysis", test_ct_equivalence_run },
{ "ct_sidechannel", "Side-channel dudect (smoke)", "ct_analysis", test_ct_sidechannel_smoke_run },
{ "diag_scalar_mul", "CT scalar_mul vs fast (diagnostic)", "ct_analysis", diag_scalar_mul_run },
// ═══════════════════════════════════════════════════════════════════
// ===================================================================
// Section 3: Differential & Cross-Library Testing
// ═══════════════════════════════════════════════════════════════════
// ===================================================================
{ "differential", "Differential correctness", "differential", test_differential_run },
{ "fiat_crypto", "Fiat-Crypto reference vectors", "differential", test_fiat_crypto_vectors_run },
{ "cross_platform_kat","Cross-platform KAT", "differential", test_cross_platform_kat_run },
// ═══════════════════════════════════════════════════════════════════
// ===================================================================
// Section 4: Standard Test Vectors (BIP-340, RFC-6979, BIP-32)
// ═══════════════════════════════════════════════════════════════════
// ===================================================================
{ "bip340_vectors", "BIP-340 official vectors", "standard_vectors", test_bip340_vectors_run },
{ "bip32_vectors", "BIP-32 official vectors TV1-5", "standard_vectors", test_bip32_vectors_run },
{ "rfc6979_vectors", "RFC 6979 ECDSA vectors", "standard_vectors", test_rfc6979_vectors_run },
{ "frost_kat", "FROST reference KAT vectors", "standard_vectors", test_frost_kat_run },
// ═══════════════════════════════════════════════════════════════════
// ===================================================================
// Section 5: Fuzzing & Adversarial Attack Resilience
// ═══════════════════════════════════════════════════════════════════
// ===================================================================
{ "audit_fuzz", "Adversarial fuzz (malform/edge)", "fuzzing", test_audit_fuzz_run },
{ "fuzz_parsers", "Parser fuzz (DER/Schnorr/Pubkey)", "fuzzing", test_fuzz_parsers_run },
{ "fuzz_addr_bip32", "Address/BIP32/FFI boundary fuzz", "fuzzing", test_fuzz_address_bip32_ffi_run },
{ "fault_injection", "Fault injection simulation", "fuzzing", test_fault_injection_run },
// ═══════════════════════════════════════════════════════════════════
// ===================================================================
// Section 6: Protocol Security (ECDSA, Schnorr, MuSig2, FROST)
// ═══════════════════════════════════════════════════════════════════
// ===================================================================
{ "ecdsa_schnorr", "ECDSA + Schnorr", "protocol_security", test_ecdsa_schnorr_run },
{ "bip32", "BIP-32 HD derivation", "protocol_security", test_bip32_run },
{ "musig2", "MuSig2", "protocol_security", test_musig2_run },
@ -225,16 +225,16 @@ static const AuditModule ALL_MODULES[] = {
{ "musig2_frost_adv", "MuSig2 + FROST advanced/adversar", "protocol_security", test_musig2_frost_advanced_run },
{ "audit_integration", "Integration (ECDH/batch/cross-proto)", "protocol_security", audit_integration_run },
// ═══════════════════════════════════════════════════════════════════
// ===================================================================
// Section 7: ABI & Memory Safety (zeroization, hardening)
// ═══════════════════════════════════════════════════════════════════
// ===================================================================
{ "audit_security", "Security hardening (zero/bitflip/nonce)", "memory_safety", audit_security_run },
{ "debug_invariants", "Debug invariant assertions", "memory_safety", test_debug_invariants_run },
{ "abi_gate", "ABI version gate (compile-time)", "memory_safety", test_abi_gate_run },
// ═══════════════════════════════════════════════════════════════════
// ===================================================================
// Section 8: Performance Validation & Regression
// ═══════════════════════════════════════════════════════════════════
// ===================================================================
{ "hash_accel", "Accelerated hashing", "performance", test_hash_accel_run },
{ "simd_batch", "SIMD batch operations", "performance", test_simd_batch_run },
{ "multiscalar", "Multi-scalar & batch verify", "performance", test_multiscalar_batch_run },
@ -386,7 +386,7 @@ static std::vector<SectionSummary> compute_section_summaries(
}
// ============================================================================
// Report writer — JSON (structured by 8 sections)
// Report writer -- JSON (structured by 8 sections)
// ============================================================================
static void write_json_report(const char* path,
const PlatformInfo& plat,
@ -469,7 +469,7 @@ static void write_json_report(const char* path,
}
// ============================================================================
// Report writer — Text (structured by 8 sections)
// Report writer -- Text (structured by 8 sections)
// ============================================================================
static void write_text_report(const char* path,
const PlatformInfo& plat,
@ -501,13 +501,13 @@ static void write_text_report(const char* path,
std::fprintf(f, "Build: %s\n", plat.build_type.c_str());
std::fprintf(f, "\n");
// ── Library selftest ───
// -- Library selftest ---
std::fprintf(f, "----------------------------------------------------------------\n");
std::fprintf(f, " [0] Library Selftest (core KAT) %s (%.0f ms)\n",
selftest_passed ? "PASS" : "FAIL", selftest_ms);
std::fprintf(f, "----------------------------------------------------------------\n\n");
// ── 8 Sections ───
// -- 8 Sections ---
int module_idx = 1;
for (int s = 0; s < (int)sections.size(); ++s) {
auto& sec = sections[s];
@ -527,7 +527,7 @@ static void write_text_report(const char* path,
std::fprintf(f, " (%.0f ms)\n\n", sec.time_ms);
}
// ── Grand total ───
// -- Grand total ---
std::fprintf(f, "================================================================\n");
std::fprintf(f, " AUDIT VERDICT: %s\n",
(total_fail == 0) ? "AUDIT-READY (ALL PASSED)" : "AUDIT-BLOCKED (FAILURES DETECTED)");
@ -592,7 +592,7 @@ int main(int argc, char* argv[]) {
std::printf(" %s\n", plat.timestamp.c_str());
std::printf("================================================================\n\n");
// ── Phase 1: Library selftest ────────────────────────────────────────
// -- Phase 1: Library selftest ----------------------------------------
std::printf("[Phase 1/3] Library selftest (ci mode)...\n");
auto st_start = std::chrono::steady_clock::now();
bool selftest_passed = Selftest(false, SelftestMode::ci, 0);
@ -605,7 +605,7 @@ int main(int argc, char* argv[]) {
std::printf("[Phase 1/3] *** Selftest FAILED *** (%.0f ms)\n\n", selftest_ms);
}
// ── Phase 2: All test modules (grouped by 8 sections) ────────────
// -- Phase 2: All test modules (grouped by 8 sections) ------------
std::printf("[Phase 2/3] Running %d test modules across %d audit sections...\n\n",
NUM_MODULES, NUM_SECTIONS);
@ -629,9 +629,9 @@ int main(int argc, char* argv[]) {
// Find the section title
for (int s = 0; s < NUM_SECTIONS; ++s) {
if (std::strcmp(SECTIONS[s].id, current_section) == 0) {
std::printf(" ──────────────────────────────────────────────────────────\n");
std::printf(" ----------------------------------------------------------\n");
std::printf(" Section %d/8: %s\n", section_num, SECTIONS[s].title_en);
std::printf(" ──────────────────────────────────────────────────────────\n");
std::printf(" ----------------------------------------------------------\n");
break;
}
}
@ -660,7 +660,7 @@ int main(int argc, char* argv[]) {
auto total_end = std::chrono::steady_clock::now();
double total_ms = std::chrono::duration<double, std::milli>(total_end - total_start).count();
// ── Phase 3: Generate reports ───────────────────────────────────────
// -- Phase 3: Generate reports ---------------------------------------
std::printf("\n[Phase 3/3] Generating audit reports...\n");
std::string json_path = report_dir + "/audit_report.json";
@ -672,7 +672,7 @@ int main(int argc, char* argv[]) {
std::printf(" JSON: %s\n", json_path.c_str());
std::printf(" Text: %s\n", text_path.c_str());
// ── Section Summary Table ───────────────────────────────────────────
// -- Section Summary Table -------------------------------------------
auto sections = compute_section_summaries(results);
std::printf("\n================================================================\n");
@ -685,7 +685,7 @@ int main(int argc, char* argv[]) {
sec.failed == 0 ? "PASS" : "FAIL");
}
// ── Final Summary ───────────────────────────────────────────────────
// -- Final Summary ---------------------------------------------------
int total_pass = modules_passed + (selftest_passed ? 1 : 0);
int total_fail = modules_failed + (selftest_passed ? 0 : 1);
int total_count = total_pass + total_fail;

68
benchmarks/README.md
View File

@ -8,25 +8,25 @@ Performance benchmarks across different platforms and configurations.
```
benchmarks/
├── cpu/
│ ├── x86-64/
│ │ ├── windows/ # Windows x64 results
│ │ └── linux/ # Linux x64 results
│ ├── riscv64/
│ │ └── linux/ # RISC-V RV64GC (Milk-V Mars, etc.)
│ ├── arm64/
│ │ ├── linux/ # ARM64 Linux (RPi, etc.)
│ │ └── macos/ # Apple Silicon (M1/M2/M3)
│ └── esp32/
│ └── embedded/ # ESP32 (limited, core only)
├── gpu/
│ ├── cuda/
│ │ ├── rtx-40xx/ # RTX 4090, 4080, etc.
│ │ ├── rtx-30xx/ # RTX 3090, 3080, etc.
│ │ ├── rtx-20xx/ # RTX 2080 Ti, etc.
│ │ └── datacenter/ # A100, H100, V100
│ └── opencl/ # NVIDIA, AMD, Intel, etc.
└── comparison/ # Cross-platform comparisons
+-- cpu/
| +-- x86-64/
| | +-- windows/ # Windows x64 results
| | +-- linux/ # Linux x64 results
| +-- riscv64/
| | +-- linux/ # RISC-V RV64GC (Milk-V Mars, etc.)
| +-- arm64/
| | +-- linux/ # ARM64 Linux (RPi, etc.)
| | +-- macos/ # Apple Silicon (M1/M2/M3)
| +-- esp32/
| +-- embedded/ # ESP32 (limited, core only)
+-- gpu/
| +-- cuda/
| | +-- rtx-40xx/ # RTX 4090, 4080, etc.
| | +-- rtx-30xx/ # RTX 3090, 3080, etc.
| | +-- rtx-20xx/ # RTX 2080 Ti, etc.
| | +-- datacenter/ # A100, H100, V100
| +-- opencl/ # NVIDIA, AMD, Intel, etc.
+-- comparison/ # Cross-platform comparisons
```
## 🚀 Running Benchmarks
@ -83,9 +83,9 @@ Squaring: X ns/op
Inversion: X ns/op
=== Point Operations ===
Point Addition: X µs/op
Point Doubling: X µs/op
Point Multiply: X µs/op
Point Addition: X us/op
Point Doubling: X us/op
Point Multiply: X us/op
Batch Multiply (n): X ms for n ops
=== Throughput ===
@ -117,8 +117,8 @@ gcc --version # or clang --version
See individual platform directories for detailed results:
- [x86-64 Windows](cpu/x86-64/windows/)
- [x86-64 Linux](cpu/x86-64/linux/)
- [**RISC-V Linux (Milk-V Mars)** ✓](cpu/riscv64/linux/) - **Updated 2026-02-11**
- [**ESP32-S3 Embedded** ✓](cpu/esp32/embedded/) - **Updated 2026-02-13**
- [**RISC-V Linux (Milk-V Mars)** OK](cpu/riscv64/linux/) - **Updated 2026-02-11**
- [**ESP32-S3 Embedded** OK](cpu/esp32/embedded/) - **Updated 2026-02-13**
- [ARM64 Linux](cpu/arm64/linux/)
- [CUDA RTX 4090](gpu/cuda/rtx-40xx/)
@ -126,39 +126,39 @@ See individual platform directories for detailed results:
### ESP32-S3 (Xtensa LX7 @ 240 MHz)
**Configuration:** Portable C++ (no assembly, no __int128)
**Date:** 2026-02-13 | **Tests:** 28/28 ✓
**Date:** 2026-02-13 | **Tests:** 28/28 OK
| Operation | Performance |
|-----------|-------------|
| Field Multiply | 7,458 ns |
| Field Square | 7,592 ns |
| Field Add | 636 ns |
| Scalar × G | 2,483 μs |
| Scalar x G | 2,483 us |
### RISC-V (Milk-V Mars - StarFive JH7110 @ 1.5 GHz)
**Configuration:** Assembly + RVV + Fast Modular Reduction
**Date:** 2026-02-11 | **Tests:** 29/29 ✓
**Date:** 2026-02-11 | **Tests:** 29/29 OK
| Operation | Performance |
|-----------|-------------|
| Field Multiply | 200 ns |
| Field Square | 185 ns |
| Point Scalar Mul | 665 μs |
| Generator Mul | 44 μs |
| Point Scalar Mul | 665 us |
| Generator Mul | 44 us |
| Batch Inverse (1000) | 611 ns/element |
### x86-64 (Typical Desktop/Server)
| Operation | Performance (est.) |
|-----------|-------------|
| Field Multiply | 8-12 ns |
| Point Scalar Mul | 60-80 μs |
| Generator Mul | 4-6 μs |
| Point Scalar Mul | 60-80 us |
| Generator Mul | 4-6 us |
*Note: x86-64 performance varies by CPU model (Intel/AMD), clock speed (3-5 GHz typical), and assembly optimizations.*
### Performance Insights
- **ESP32-S3 vs x86-64:** ~230× difference in field multiply, primarily due to:
- **ESP32-S3 vs x86-64:** ~230x difference in field multiply, primarily due to:
- Clock speed (240 MHz vs 3.5+ GHz)
- 32-bit portable arithmetic vs 64-bit with BMI2/ADX
- No assembly optimizations on Xtensa (yet)
@ -168,14 +168,14 @@ See individual platform directories for detailed results:
- Suitable for IoT authentication, hardware wallets
- ~2.5ms per signature verification
- **RISC-V vs x86-64:** ~8-10× difference, primarily due to:
- **RISC-V vs x86-64:** ~8-10x difference, primarily due to:
- Clock speed (1.5 GHz vs 3.5+ GHz)
- ISA maturity and compiler optimizations
- Memory subsystem performance
- **RISC-V Achievement:** Production-ready performance for embedded/IoT cryptographic applications
- **Assembly Impact:** 2-3× speedup vs portable C++ on x86-64 and RISC-V platforms
- **Assembly Impact:** 2-3x speedup vs portable C++ on x86-64 and RISC-V platforms
**Contribute your results to expand this comparison!**

42
benchmarks/comparison/cuda_vs_opencl_rtx5060ti.md
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@ -1,4 +1,4 @@
# CUDA vs OpenCL Comparison — NVIDIA RTX 5060 Ti
# CUDA vs OpenCL Comparison -- NVIDIA RTX 5060 Ti
**Date:** 2026-02-14 (updated with optimized OpenCL kernels)
**Hardware:** NVIDIA GeForce RTX 5060 Ti (36 SMs, 2602 MHz, 16 GB, 128-bit bus)
@ -10,10 +10,10 @@
## Optimizations Applied (OpenCL)
1. **field_mul**: Fully unrolled 4×4 schoolbook multiplication (no loops)
1. **field_mul**: Fully unrolled 4x4 schoolbook multiplication (no loops)
2. **field_sqr**: Fully unrolled with separate off-diagonal/diagonal phases
3. **field_inv**: Addition chain (Fermat chain) — replaced naive 256-bit binary exponentiation
4. **scalar_mul**: wNAF window-5 with 8-entry precomputed table — replaced simple double-and-add
3. **field_inv**: Addition chain (Fermat chain) -- replaced naive 256-bit binary exponentiation
4. **scalar_mul**: wNAF window-5 with 8-entry precomputed table -- replaced simple double-and-add
5. **Benchmark**: Batch throughput measurement (amortized, same methodology as CUDA)
---
@ -22,38 +22,38 @@
| Operation | CUDA ns/op | CUDA M/s | OpenCL ns/op | OpenCL M/s | Ratio |
|-----------|-----------|----------|-------------|-----------|-------|
| Field Add | 0.2 | 4,130 | 13.1 | 76 | 54× |
| Field Mul | 0.2 | 4,134 | 12.2 | 82 | 50× |
| Field Sqr | — | — | 8.3 | 121 | — |
| Field Inv | 12.1 | 82.7 | 44.8 | 22.3 | 3.7× |
| Point Double | 1.6 | 642 | 49.7 | 20 | 32× |
| Point Add | 2.1 | 477 | 70.8 | 14 | 34× |
| Scalar Mul (G×k) | 591 | 1.69 | 419 | 2.39 | 0.7× ✓ |
| Field Add | 0.2 | 4,130 | 13.1 | 76 | 54x |
| Field Mul | 0.2 | 4,134 | 12.2 | 82 | 50x |
| Field Sqr | -- | -- | 8.3 | 121 | -- |
| Field Inv | 12.1 | 82.7 | 44.8 | 22.3 | 3.7x |
| Point Double | 1.6 | 642 | 49.7 | 20 | 32x |
| Point Add | 2.1 | 477 | 70.8 | 14 | 34x |
| Scalar Mul (Gxk) | 591 | 1.69 | 419 | 2.39 | 0.7x OK |
### Scalar Multiplication Scaling
| Batch Size | CUDA ns/op | OpenCL ns/op |
|-----------|-----------|-------------|
| 256 | — | 13,000 |
| 1,024 | — | 3,300 |
| 4,096 | — | 838 |
| 16,384 | — | 425 |
| 256 | -- | 13,000 |
| 1,024 | -- | 3,300 |
| 4,096 | -- | 838 |
| 16,384 | -- | 425 |
| 65,536 | ~591 | 419 |
| 131,072 | 591 | — |
| 131,072 | 591 | -- |
---
## Key Observations
1. **OpenCL scalar_mul matches CUDA** — at batch=65K, OpenCL achieves 2.39 M/s vs CUDA's 1.69 M/s. The wNAF implementation and efficient kernel dispatch make this competitive. Both use window-5 wNAF with 8-entry precomputation tables.
1. **OpenCL scalar_mul matches CUDA** -- at batch=65K, OpenCL achieves 2.39 M/s vs CUDA's 1.69 M/s. The wNAF implementation and efficient kernel dispatch make this competitive. Both use window-5 wNAF with 8-entry precomputation tables.
2. **CUDA dominates field arithmetic** — 50-54× faster for field add/mul. CUDA's native PTX `mad.lo/hi.u64` instructions and compiler register allocation give sub-nanosecond amortized times that OpenCL cannot match through `mul_hi()`.
2. **CUDA dominates field arithmetic** -- 50-54x faster for field add/mul. CUDA's native PTX `mad.lo/hi.u64` instructions and compiler register allocation give sub-nanosecond amortized times that OpenCL cannot match through `mul_hi()`.
3. **Field inversion gap narrows to 3.7×** — the addition chain optimization reduced OpenCL field_inv from ~246μs (single-op with overhead) to 44.8 ns/op (batch), closing most of the gap with CUDA's 12.1 ns.
3. **Field inversion gap narrows to 3.7x** -- the addition chain optimization reduced OpenCL field_inv from ~246us (single-op with overhead) to 44.8 ns/op (batch), closing most of the gap with CUDA's 12.1 ns.
4. **Point operations ~30× gap** — these compose multiple field operations, so the field arithmetic gap propagates. Each point_double uses ~10 field ops, each point_add ~16 field ops.
4. **Point operations ~30x gap** -- these compose multiple field operations, so the field arithmetic gap propagates. Each point_double uses ~10 field ops, each point_add ~16 field ops.
5. **Cross-platform advantage** — OpenCL runs on Intel, AMD, and NVIDIA GPUs without code changes. CUDA is NVIDIA-only but provides the best possible performance on NVIDIA hardware for field-level operations.
5. **Cross-platform advantage** -- OpenCL runs on Intel, AMD, and NVIDIA GPUs without code changes. CUDA is NVIDIA-only but provides the best possible performance on NVIDIA hardware for field-level operations.
## When to Use Which

28
benchmarks/cpu/esp32/embedded/README.md
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@ -7,7 +7,7 @@ Performance benchmarks on ESP32-S3 embedded platform.
| Property | Value |
|----------|-------|
| **Chip** | ESP32-S3 |
| **Cores** | 2 × Xtensa LX7 |
| **Cores** | 2 x Xtensa LX7 |
| **Frequency** | 240 MHz |
| **RAM** | 512 KB SRAM |
| **Build Mode** | Portable C++ (no assembly, no __int128) |
@ -21,12 +21,12 @@ Performance benchmarks on ESP32-S3 embedded platform.
**All 28 library tests passed successfully!**
Verified operations:
- ✅ Field arithmetic (add, sub, mul, sqr, inverse)
- ✅ Scalar arithmetic
- ✅ Point operations (add, double, multiply)
- ✅ Generator point multiplications
- ✅ Point group identities
- ✅ Test vectors (NIST-style verification)
- [OK] Field arithmetic (add, sub, mul, sqr, inverse)
- [OK] Scalar arithmetic
- [OK] Point operations (add, double, multiply)
- [OK] Generator point multiplications
- [OK] Point group identities
- [OK] Test vectors (NIST-style verification)
## 📈 Benchmark Results
@ -42,23 +42,23 @@ Verified operations:
| Operation | Time |
|-----------|-----:|
| Scalar × G (Generator Mul) | 2,483 μs |
| Scalar x G (Generator Mul) | 2,483 us |
## 📊 Comparison with Other Platforms
| Platform | Clock | Field Mul | Scalar×G |
| Platform | Clock | Field Mul | ScalarxG |
|----------|------:|----------:|---------:|
| **ESP32-S3** | 240 MHz | 7,458 ns | 2,483 μs |
| Milk-V Mars (RISC-V) | 1.5 GHz | 197 ns | 40 μs |
| x86-64 (i5) | 3.5 GHz | 33 ns | 5 μs |
| **ESP32-S3** | 240 MHz | 7,458 ns | 2,483 us |
| Milk-V Mars (RISC-V) | 1.5 GHz | 197 ns | 40 us |
| x86-64 (i5) | 3.5 GHz | 33 ns | 5 us |
**Notes:**
- ESP32-S3 uses portable 32-bit arithmetic (no `__int128`)
- No assembly optimizations (yet)
- Performance is ~38× slower than x86-64, reasonable for a 240 MHz MCU
- Performance is ~38x slower than x86-64, reasonable for a 240 MHz MCU
- Future: Xtensa assembly optimizations planned
## 🔧 Build Configuration
## [TOOL] Build Configuration
```cmake
# ESP32 build flags

6
benchmarks/cpu/riscv64/linux/README.md
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@ -15,11 +15,11 @@
| Operation | Time |
|-----------|------|
| Field Multiplication | 200 ns |
| Point Scalar Multiply | 665 μs |
| Generator Multiply | 44 μs |
| Point Scalar Multiply | 665 us |
| Generator Multiply | 44 us |
| Batch Inverse (1000) | 611 ns/element |
✓ All 29/29 self-tests passed
OK All 29/29 self-tests passed
---

12
benchmarks/cpu/riscv64/linux/milkv-mars-20260208.txt
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@ -14,7 +14,7 @@ RVV (Vector Extension): ENABLED
Fast Modular Reduction: ENABLED
Date: 2026-02-08
Test Suite: 29/29 tests passed ✓
Test Suite: 29/29 tests passed OK
==============================================
FIELD ARITHMETIC OPERATIONS
@ -23,15 +23,15 @@ Field Multiplication: 200 ns/op
Field Square: 185 ns/op
Field Addition: 36 ns/op
Field Subtraction: 33 ns/op
Field Inversion: 18 μs/op
Field Inversion: 18 us/op
==============================================
POINT OPERATIONS
==============================================
Point Addition: 3 μs/op
Point Doubling: 1 μs/op
Point Scalar Multiply: 665 μs/op
Generator Multiply: 44 μs/op
Point Addition: 3 us/op
Point Doubling: 1 us/op
Point Scalar Multiply: 665 us/op
Generator Multiply: 44 us/op
==============================================
BATCH OPERATIONS

24
benchmarks/gpu/cuda/rtx-50xx/RTX_5060_Ti.md
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@ -1,4 +1,4 @@
# CUDA Benchmark — NVIDIA RTX 5060 Ti
# CUDA Benchmark -- NVIDIA RTX 5060 Ti
**Date:** 2026-02-14 (updated after 32-bit hybrid optimization)
**OS:** Linux x86_64 (Ubuntu)
@ -27,29 +27,29 @@
| Field Inverse | 10.2 ns | 97.57 M/s |
| Point Add | 0.9 ns | 1,065.72 M/s |
| Point Double | 0.7 ns | 1,356.07 M/s |
| Scalar Mul (P×k) | 234.8 ns | 4.26 M/s |
| Generator Mul (G×k) | 221.7 ns | 4.51 M/s |
| Scalar Mul (Pxk) | 234.8 ns | 4.26 M/s |
| Generator Mul (Gxk) | 221.7 ns | 4.51 M/s |
## Optimizations Applied
1. **32-bit Hybrid Multiplication** (`SECP256K1_CUDA_USE_HYBRID_MUL=1`):
- Comba-style 32-bit multiplication (64 MAD32 via PTX) instead of 64-bit
- Consumer GPUs have INT32 throughput 32× higher than INT64
- Consumer GPUs have INT32 throughput 32x higher than INT64
2. **32-bit Reduction** (`reduce_512_to_256_32`):
- T_hi × 977 in 32-bit MAD chain (16 PTX ops) + T_hi << 32 shift
- T_hi x 977 in 32-bit MAD chain (16 PTX ops) + T_hi << 32 shift
- Avoids INT64 multiplies in the hot-path reduction
3. **Single-pass K_MOD reduction** (64-bit path):
- T_hi × K_MOD in one MAD chain instead of T_hi×977 + T_hi<<32 (two passes)
- T_hi x K_MOD in one MAD chain instead of T_hix977 + T_hi<<32 (two passes)
## Improvement vs Previous
| Operation | Before | After | Speedup |
|-----------|--------|-------|---------|
| Point Add | 2.1 ns (476 M/s) | 0.9 ns (1,066 M/s) | **2.24×** |
| Point Double | 1.6 ns (642 M/s) | 0.7 ns (1,356 M/s) | **2.11×** |
| Scalar Mul | 624.9 ns (1.60 M/s) | 234.8 ns (4.26 M/s) | **2.66×** |
| Generator Mul | 591.5 ns (1.69 M/s) | 221.7 ns (4.51 M/s) | **2.67×** |
| Field Inverse | 12.1 ns (82.66 M/s) | 10.2 ns (97.57 M/s) | **1.18×** |
| Point Add | 2.1 ns (476 M/s) | 0.9 ns (1,066 M/s) | **2.24x** |
| Point Double | 1.6 ns (642 M/s) | 0.7 ns (1,356 M/s) | **2.11x** |
| Scalar Mul | 624.9 ns (1.60 M/s) | 234.8 ns (4.26 M/s) | **2.66x** |
| Generator Mul | 591.5 ns (1.69 M/s) | 221.7 ns (4.51 M/s) | **2.67x** |
| Field Inverse | 12.1 ns (82.66 M/s) | 10.2 ns (97.57 M/s) | **1.18x** |
## Notes
@ -57,4 +57,4 @@
- Amortized per-element time (includes kernel launch cost spread over batch)
- Results consistent across 5 measurement iterations with 3 warmup passes
- Field Mul/Add unchanged at 0.2 ns (memory bandwidth limited at this batch size)
- GPU search app: 1,131 → 1,223 M/s (+8.1%) end-to-end throughput
- GPU search app: 1,131 -> 1,223 M/s (+8.1%) end-to-end throughput

14
benchmarks/gpu/opencl/RTX_5060_Ti.md
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@ -1,4 +1,4 @@
# OpenCL Benchmark — NVIDIA RTX 5060 Ti
# OpenCL Benchmark -- NVIDIA RTX 5060 Ti
**Date:** 2026-02-14 (updated: optimized kernels)
**OS:** Linux x86_64 (Ubuntu)
@ -21,7 +21,7 @@
## Optimizations Applied
1. **field_mul**: Fully unrolled 4×4 schoolbook (no loops, 16 explicit mul64_full)
1. **field_mul**: Fully unrolled 4x4 schoolbook (no loops, 16 explicit mul64_full)
2. **field_sqr**: Fully unrolled off-diagonal + diagonal computation
3. **field_inv**: Fermat addition chain (~260 ops instead of ~448 naive)
4. **scalar_mul**: wNAF window-5 with 8-entry precomputed table
@ -44,12 +44,12 @@
| Point Double | 49.7 ns | 20.12 M/s |
| Point Add | 70.8 ns | 14.13 M/s |
## Scalar Multiplication (G×k) Scaling
## Scalar Multiplication (Gxk) Scaling
| Batch Size | Time/Op | Throughput |
|------------|---------|------------|
| 256 | 13.0 μs | 77 K/s |
| 1,024 | 3.3 μs | 306 K/s |
| 256 | 13.0 us | 77 K/s |
| 1,024 | 3.3 us | 306 K/s |
| 4,096 | 838 ns | 1.19 M/s |
| 16,384 | 425 ns | 2.35 M/s |
| 65,536 | 419 ns | 2.39 M/s |
@ -58,7 +58,7 @@
| Batch Size | Time/Op | Throughput |
|------------|---------|------------|
| 256 | 1.5 μs | 651 K/s |
| 256 | 1.5 us | 651 K/s |
| 1,024 | 370 ns | 2.70 M/s |
| 4,096 | 97.9 ns | 10.21 M/s |
| 16,384 | 49.9 ns | 20.04 M/s |
@ -67,5 +67,5 @@
- All times are amortized per-element from batch dispatch (same methodology as CUDA benchmark)
- Scalar multiplication at batch=65K achieves 2.39 M/s (CUDA now achieves 4.51 M/s after 32-bit hybrid optimization)
- Field arithmetic ~50× slower than CUDA due to OpenCL buffer transfer overhead vs in-register CUDA kernel
- Field arithmetic ~50x slower than CUDA due to OpenCL buffer transfer overhead vs in-register CUDA kernel
- 32/32 correctness tests pass

10
bindings/c_api/CMakeLists.txt
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@ -1,5 +1,5 @@
# ============================================================================
# UltrafastSecp256k1 — C API Shared Library
# UltrafastSecp256k1 -- C API Shared Library
# ============================================================================
# Builds libultrafast_secp256k1.so / .dll / .dylib
# Usage:
@ -17,7 +17,7 @@ set(CMAKE_CXX_STANDARD 20)
set(CMAKE_CXX_STANDARD_REQUIRED ON)
set(CMAKE_POSITION_INDEPENDENT_CODE ON)
# ── Find the CPU library ───────────────────────────────────────────────────
# -- Find the CPU library ---------------------------------------------------
# The CPU library is built by the parent CMake project.
# We locate its include dirs and link against it.
@ -31,7 +31,7 @@ if(NOT EXISTS "${CPU_INCLUDE_DIR}/UltrafastSecp256k1.hpp")
message(FATAL_ERROR "Cannot find UltrafastSecp256k1.hpp at ${CPU_INCLUDE_DIR}")
endif()
# ── Shared library target ─────────────────────────────────────────────────
# -- Shared library target -------------------------------------------------
add_library(ultrafast_secp256k1 SHARED
ultrafast_secp256k1.cpp
@ -68,7 +68,7 @@ else()
target_sources(ultrafast_secp256k1 PRIVATE ${CPU_SOURCES})
endif()
# ── Platform-specific flags ───────────────────────────────────────────────
# -- Platform-specific flags -----------------------------------------------
if(WIN32)
# Windows: export all symbols through the SECP256K1_API macro
@ -95,7 +95,7 @@ set_target_properties(ultrafast_secp256k1 PROPERTIES
PUBLIC_HEADER ultrafast_secp256k1.h
)
# ── Install ───────────────────────────────────────────────────────────────
# -- Install ---------------------------------------------------------------
include(GNUInstallDirs)
install(TARGETS ultrafast_secp256k1

20
bindings/c_api/README.md
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@ -1,19 +1,19 @@
# ultrafast_secp256k1 — C API
# ultrafast_secp256k1 -- C API
Standalone C header-only API for [UltrafastSecp256k1](https://github.com/shrec/UltrafastSecp256k1) — high-performance secp256k1 elliptic curve cryptography.
Standalone C header-only API for [UltrafastSecp256k1](https://github.com/shrec/UltrafastSecp256k1) -- high-performance secp256k1 elliptic curve cryptography.
This is a **stateless** API with `secp256k1_*` naming (no context object). It differs from the main `ufsecp_*` context-based API.
## Features
- **ECDSA** — sign, verify, DER serialization (RFC 6979)
- **Schnorr** — BIP-340 sign/verify
- **ECDH** — shared secret
- **BIP-32** — HD key derivation
- **Taproot** — output key tweaking, commitment verification (BIP-341)
- **Addresses** — P2PKH, P2WPKH, P2TR
- **WIF** — encode/decode
- **Hashing** — SHA-256, HASH160
- **ECDSA** -- sign, verify, DER serialization (RFC 6979)
- **Schnorr** -- BIP-340 sign/verify
- **ECDH** -- shared secret
- **BIP-32** -- HD key derivation
- **Taproot** -- output key tweaking, commitment verification (BIP-341)
- **Addresses** -- P2PKH, P2WPKH, P2TR
- **WIF** -- encode/decode
- **Hashing** -- SHA-256, HASH160
## Quick Start

4
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@ -1,8 +1,8 @@
# Ufsecp
C# P/Invoke bindings for [UltrafastSecp256k1](https://github.com/shrec/UltrafastSecp256k1) — high-performance secp256k1 elliptic curve cryptography.
C# P/Invoke bindings for [UltrafastSecp256k1](https://github.com/shrec/UltrafastSecp256k1) -- high-performance secp256k1 elliptic curve cryptography.
Bundles native runtimes for Windows x64, Linux x64, Linux ARM64, and macOS ARM64. The native library is auto-copied to your build output — no manual setup required.
Bundles native runtimes for Windows x64, Linux x64, Linux ARM64, and macOS ARM64. The native library is auto-copied to your build output -- no manual setup required.
## Install

22
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@ -1,18 +1,18 @@
# ufsecp — Dart
# ufsecp -- Dart
Dart FFI binding for [UltrafastSecp256k1](https://github.com/shrec/UltrafastSecp256k1) — high-performance secp256k1 elliptic curve cryptography.
Dart FFI binding for [UltrafastSecp256k1](https://github.com/shrec/UltrafastSecp256k1) -- high-performance secp256k1 elliptic curve cryptography.
## Features
- **ECDSA** — sign, verify, recover, DER serialization (RFC 6979)
- **Schnorr** — BIP-340 sign/verify
- **ECDH** — compressed, x-only, raw shared secret
- **BIP-32** — HD key derivation (master/derive/path/privkey/pubkey)
- **Taproot** — output key tweaking, verification (BIP-341)
- **Addresses** — P2PKH, P2WPKH, P2TR
- **WIF** — encode/decode
- **Hashing** — SHA-256 (hardware-accelerated), HASH160, tagged hash
- **Key tweaking** — negate, add, multiply
- **ECDSA** -- sign, verify, recover, DER serialization (RFC 6979)
- **Schnorr** -- BIP-340 sign/verify
- **ECDH** -- compressed, x-only, raw shared secret
- **BIP-32** -- HD key derivation (master/derive/path/privkey/pubkey)
- **Taproot** -- output key tweaking, verification (BIP-341)
- **Addresses** -- P2PKH, P2WPKH, P2TR
- **WIF** -- encode/decode
- **Hashing** -- SHA-256 (hardware-accelerated), HASH160, tagged hash
- **Key tweaking** -- negate, add, multiply
## Quick Start

22
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@ -1,18 +1,18 @@
# ufsecp — Go
# ufsecp -- Go
Go (CGo) binding for [UltrafastSecp256k1](https://github.com/shrec/UltrafastSecp256k1) — high-performance secp256k1 elliptic curve cryptography.
Go (CGo) binding for [UltrafastSecp256k1](https://github.com/shrec/UltrafastSecp256k1) -- high-performance secp256k1 elliptic curve cryptography.
## Features
- **ECDSA** — sign, verify, recover, DER serialization (RFC 6979)
- **Schnorr** — BIP-340 sign/verify
- **ECDH** — compressed, x-only, raw shared secret
- **BIP-32** — HD key derivation (master/derive/path/privkey/pubkey)
- **Taproot** — output key tweaking, verification (BIP-341)
- **Addresses** — P2PKH, P2WPKH, P2TR
- **WIF** — encode/decode
- **Hashing** — SHA-256 (hardware-accelerated), HASH160, tagged hash
- **Key tweaking** — negate, add, multiply
- **ECDSA** -- sign, verify, recover, DER serialization (RFC 6979)
- **Schnorr** -- BIP-340 sign/verify
- **ECDH** -- compressed, x-only, raw shared secret
- **BIP-32** -- HD key derivation (master/derive/path/privkey/pubkey)
- **Taproot** -- output key tweaking, verification (BIP-341)
- **Addresses** -- P2PKH, P2WPKH, P2TR
- **WIF** -- encode/decode
- **Hashing** -- SHA-256 (hardware-accelerated), HASH160, tagged hash
- **Key tweaking** -- negate, add, multiply
## Quick Start

22
bindings/java/README.md
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@ -1,18 +1,18 @@
# ufsecp — Java
# ufsecp -- Java
Java binding for [UltrafastSecp256k1](https://github.com/shrec/UltrafastSecp256k1) — high-performance secp256k1 elliptic curve cryptography via JNI.
Java binding for [UltrafastSecp256k1](https://github.com/shrec/UltrafastSecp256k1) -- high-performance secp256k1 elliptic curve cryptography via JNI.
## Features
- **ECDSA** — sign, verify, recover, DER serialization (RFC 6979)
- **Schnorr** — BIP-340 sign/verify
- **ECDH** — compressed, x-only, raw shared secret
- **BIP-32** — HD key derivation (master/derive/path/privkey/pubkey)
- **Taproot** — output key tweaking, verification (BIP-341)
- **Addresses** — P2PKH, P2WPKH, P2TR
- **WIF** — encode/decode
- **Hashing** — SHA-256 (hardware-accelerated), HASH160, tagged hash
- **Key tweaking** — negate, add, multiply
- **ECDSA** -- sign, verify, recover, DER serialization (RFC 6979)
- **Schnorr** -- BIP-340 sign/verify
- **ECDH** -- compressed, x-only, raw shared secret
- **BIP-32** -- HD key derivation (master/derive/path/privkey/pubkey)
- **Taproot** -- output key tweaking, verification (BIP-341)
- **Addresses** -- P2PKH, P2WPKH, P2TR
- **WIF** -- encode/decode
- **Hashing** -- SHA-256 (hardware-accelerated), HASH160, tagged hash
- **Key tweaking** -- negate, add, multiply
## Quick Start

22
bindings/nodejs/README.md
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@ -4,14 +4,14 @@ High-performance Node.js native addon for secp256k1 elliptic curve cryptography,
## Features
- **ECDSA** — sign, verify, recover, DER serialization (RFC 6979)
- **Schnorr** — BIP-340 sign/verify
- **ECDH** — compressed, x-only, raw shared secret
- **BIP-32** — HD key derivation
- **Taproot** — output key tweaking (BIP-341)
- **Addresses** — P2PKH, P2WPKH, P2TR
- **WIF** — encode/decode
- **Hashing** — SHA-256 (hardware-accelerated), HASH160, tagged hash
- **ECDSA** -- sign, verify, recover, DER serialization (RFC 6979)
- **Schnorr** -- BIP-340 sign/verify
- **ECDH** -- compressed, x-only, raw shared secret
- **BIP-32** -- HD key derivation
- **Taproot** -- output key tweaking (BIP-341)
- **Addresses** -- P2PKH, P2WPKH, P2TR
- **WIF** -- encode/decode
- **Hashing** -- SHA-256 (hardware-accelerated), HASH160, tagged hash
## Install
@ -116,9 +116,9 @@ Built on hand-optimized C/C++ with platform-specific acceleration (AVX2, SHA-NI,
| Operation | x86-64 | ARM64 | RISC-V |
|-----------|--------|-------|--------|
| ECDSA Sign | 8 μs | 30 μs | — |
| kG (generator mul) | 5 μs | 14 μs | 33 μs |
| kP (arbitrary mul) | 25 μs | 131 μs | 154 μs |
| ECDSA Sign | 8 us | 30 us | -- |
| kG (generator mul) | 5 us | 14 us | 33 us |
| kP (arbitrary mul) | 25 us | 131 us | 154 us |
## License

24
bindings/php/README.md
View File

@ -1,21 +1,21 @@
# Ufsecp — PHP
# Ufsecp -- PHP
PHP FFI binding for [UltrafastSecp256k1](https://github.com/shrec/UltrafastSecp256k1) — high-performance secp256k1 elliptic curve cryptography.
PHP FFI binding for [UltrafastSecp256k1](https://github.com/shrec/UltrafastSecp256k1) -- high-performance secp256k1 elliptic curve cryptography.
This is the **reference binding** with 100% API coverage.
## Features
- **ECDSA** — sign, verify, recover, DER serialization (RFC 6979)
- **Schnorr** — BIP-340 sign/verify
- **ECDH** — compressed, x-only, raw shared secret
- **BIP-32** — HD key derivation (master/derive/path/privkey/pubkey)
- **Taproot** — output key tweaking, verification (BIP-341)
- **Addresses** — P2PKH, P2WPKH, P2TR
- **WIF** — encode/decode
- **Hashing** — SHA-256 (hardware-accelerated), HASH160, tagged hash
- **Key tweaking** — negate, add, multiply
- **Context** — create, destroy, clone, last_error, ctx_size
- **ECDSA** -- sign, verify, recover, DER serialization (RFC 6979)
- **Schnorr** -- BIP-340 sign/verify
- **ECDH** -- compressed, x-only, raw shared secret
- **BIP-32** -- HD key derivation (master/derive/path/privkey/pubkey)
- **Taproot** -- output key tweaking, verification (BIP-341)
- **Addresses** -- P2PKH, P2WPKH, P2TR
- **WIF** -- encode/decode
- **Hashing** -- SHA-256 (hardware-accelerated), HASH160, tagged hash
- **Key tweaking** -- negate, add, multiply
- **Context** -- create, destroy, clone, last_error, ctx_size
## Requirements

22
bindings/python/README.md
View File

@ -1,18 +1,18 @@
# ufsecp — Python
# ufsecp -- Python
Python ctypes binding for [UltrafastSecp256k1](https://github.com/shrec/UltrafastSecp256k1) — high-performance secp256k1 elliptic curve cryptography.
Python ctypes binding for [UltrafastSecp256k1](https://github.com/shrec/UltrafastSecp256k1) -- high-performance secp256k1 elliptic curve cryptography.
## Features
- **ECDSA** — sign, verify, recover, DER serialization (RFC 6979)
- **Schnorr** — BIP-340 sign/verify
- **ECDH** — compressed, x-only, raw shared secret
- **BIP-32** — HD key derivation (master/derive/path/privkey/pubkey)
- **Taproot** — output key tweaking, verification (BIP-341)
- **Addresses** — P2PKH, P2WPKH, P2TR
- **WIF** — encode/decode
- **Hashing** — SHA-256 (hardware-accelerated), HASH160, tagged hash
- **Key tweaking** — negate, add, multiply
- **ECDSA** -- sign, verify, recover, DER serialization (RFC 6979)
- **Schnorr** -- BIP-340 sign/verify
- **ECDH** -- compressed, x-only, raw shared secret
- **BIP-32** -- HD key derivation (master/derive/path/privkey/pubkey)
- **Taproot** -- output key tweaking, verification (BIP-341)
- **Addresses** -- P2PKH, P2WPKH, P2TR
- **WIF** -- encode/decode
- **Hashing** -- SHA-256 (hardware-accelerated), HASH160, tagged hash
- **Key tweaking** -- negate, add, multiply
## Install

22
bindings/python/tests/smoke_test.py
View File

@ -25,7 +25,7 @@ sys.path.insert(0, os.path.join(os.path.dirname(__file__), ".."))
from ufsecp import Ufsecp, UfsecpError, NET_MAINNET
# ── Golden Vectors ───────────────────────────────────────────────────────────
# -- Golden Vectors -----------------------------------------------------------
# Private key: 32 bytes (k=1 for simplicity in some tests, known key for BIP-340)
KNOWN_PRIVKEY = bytes.fromhex(
@ -51,11 +51,11 @@ SHA256_EMPTY = bytes.fromhex(
RFC6979_MSG = bytes(32) # all-zero 32-byte hash
# BIP-340 test vector 0:
# privkey: 3 (adjusted for BIP-340 — we use k=1 which is simpler)
# We verify sign→verify round-trip with deterministic aux=zeros
# privkey: 3 (adjusted for BIP-340 -- we use k=1 which is simpler)
# We verify sign->verify round-trip with deterministic aux=zeros
BIP340_AUX = bytes(32)
# ── Tests ────────────────────────────────────────────────────────────────────
# -- Tests --------------------------------------------------------------------
def test_ctx_create_destroy():
"""Context lifecycle: create, ABI check, destroy."""
@ -83,7 +83,7 @@ def test_seckey_verify():
def test_pubkey_create():
"""Pubkey derivation — golden vector k=1 → G."""
"""Pubkey derivation -- golden vector k=1 -> G."""
with Ufsecp() as ctx:
pub = ctx.pubkey_create(KNOWN_PRIVKEY)
assert pub == KNOWN_PUBKEY_COMPRESSED, (
@ -92,7 +92,7 @@ def test_pubkey_create():
def test_pubkey_xonly():
"""X-only pubkey — golden vector k=1."""
"""X-only pubkey -- golden vector k=1."""
with Ufsecp() as ctx:
xonly = ctx.pubkey_xonly(KNOWN_PRIVKEY)
assert xonly == KNOWN_PUBKEY_XONLY
@ -115,7 +115,7 @@ def test_ecdsa_sign_verify():
def test_ecdsa_der_roundtrip():
"""ECDSA compact ↔ DER conversion."""
"""ECDSA compact <-> DER conversion."""
with Ufsecp() as ctx:
sig = ctx.ecdsa_sign(RFC6979_MSG, KNOWN_PRIVKEY)
der = ctx.ecdsa_sig_to_der(sig)
@ -213,12 +213,12 @@ def test_ecdh():
def test_error_path():
"""Intentional error: verify methods return False for bad inputs."""
with Ufsecp() as ctx:
# all-zero key → invalid → returns False
# all-zero key -> invalid -> returns False
assert not ctx.seckey_verify(bytes(32)), "zero key must return False"
def test_golden_ecdsa_deterministic():
"""RFC 6979: same key + same message → same signature every time."""
"""RFC 6979: same key + same message -> same signature every time."""
with Ufsecp() as ctx:
sig1 = ctx.ecdsa_sign(RFC6979_MSG, KNOWN_PRIVKEY)
sig2 = ctx.ecdsa_sign(RFC6979_MSG, KNOWN_PRIVKEY)
@ -226,14 +226,14 @@ def test_golden_ecdsa_deterministic():
def test_golden_schnorr_deterministic():
"""BIP-340: same key + same message + same aux → same signature."""
"""BIP-340: same key + same message + same aux -> same signature."""
with Ufsecp() as ctx:
sig1 = ctx.schnorr_sign(RFC6979_MSG, KNOWN_PRIVKEY, BIP340_AUX)
sig2 = ctx.schnorr_sign(RFC6979_MSG, KNOWN_PRIVKEY, BIP340_AUX)
assert sig1 == sig2, "Schnorr signatures must be deterministic"
# ── Runner ───────────────────────────────────────────────────────────────────
# -- Runner -------------------------------------------------------------------
def main():
tests = [v for k, v in sorted(globals().items()) if k.startswith("test_")]

18
bindings/react-native/README.md
View File

@ -2,18 +2,18 @@
High-performance secp256k1 elliptic curve cryptography for React Native, powered by [UltrafastSecp256k1](https://github.com/shrec/UltrafastSecp256k1).
Uses native C/C++ through JSI (Android NDK + iOS) for maximum performance — no bridge overhead.
Uses native C/C++ through JSI (Android NDK + iOS) for maximum performance -- no bridge overhead.
## Features
- **ECDSA** — sign, verify, recover (RFC 6979, low-S)
- **Schnorr** — BIP-340 sign/verify
- **ECDH** — shared secret derivation
- **BIP-32** — HD key derivation
- **Taproot** — BIP-341 output key tweaking
- **Addresses** — P2PKH, P2WPKH, P2TR
- **WIF** — encode/decode
- **Hashing** — SHA-256, HASH160, tagged hash
- **ECDSA** -- sign, verify, recover (RFC 6979, low-S)
- **Schnorr** -- BIP-340 sign/verify
- **ECDH** -- shared secret derivation
- **BIP-32** -- HD key derivation
- **Taproot** -- BIP-341 output key tweaking
- **Addresses** -- P2PKH, P2WPKH, P2TR
- **WIF** -- encode/decode
- **Hashing** -- SHA-256, HASH160, tagged hash
## Install

22
bindings/ruby/README.md
View File

@ -1,18 +1,18 @@
# ufsecp — Ruby
# ufsecp -- Ruby
Ruby FFI binding for [UltrafastSecp256k1](https://github.com/shrec/UltrafastSecp256k1) — high-performance secp256k1 elliptic curve cryptography.
Ruby FFI binding for [UltrafastSecp256k1](https://github.com/shrec/UltrafastSecp256k1) -- high-performance secp256k1 elliptic curve cryptography.
## Features
- **ECDSA** — sign, verify, recover, DER serialization (RFC 6979)
- **Schnorr** — BIP-340 sign/verify
- **ECDH** — compressed, x-only, raw shared secret
- **BIP-32** — HD key derivation (master/derive/path/privkey/pubkey)
- **Taproot** — output key tweaking, verification (BIP-341)
- **Addresses** — P2PKH, P2WPKH, P2TR
- **WIF** — encode/decode
- **Hashing** — SHA-256 (hardware-accelerated), HASH160, tagged hash
- **Key tweaking** — negate, add, multiply
- **ECDSA** -- sign, verify, recover, DER serialization (RFC 6979)
- **Schnorr** -- BIP-340 sign/verify
- **ECDH** -- compressed, x-only, raw shared secret
- **BIP-32** -- HD key derivation (master/derive/path/privkey/pubkey)
- **Taproot** -- output key tweaking, verification (BIP-341)
- **Addresses** -- P2PKH, P2WPKH, P2TR
- **WIF** -- encode/decode
- **Hashing** -- SHA-256 (hardware-accelerated), HASH160, tagged hash
- **Key tweaking** -- negate, add, multiply
## Install

22
bindings/rust/README.md
View File

@ -1,20 +1,20 @@
# ufsecp — Rust
# ufsecp -- Rust
Safe Rust wrapper for [UltrafastSecp256k1](https://github.com/shrec/UltrafastSecp256k1) — high-performance secp256k1 elliptic curve cryptography.
Safe Rust wrapper for [UltrafastSecp256k1](https://github.com/shrec/UltrafastSecp256k1) -- high-performance secp256k1 elliptic curve cryptography.
Wraps the `ufsecp-sys` FFI crate with a safe, ergonomic API.
## Features
- **ECDSA** — sign, verify, recover, DER serialization (RFC 6979)
- **Schnorr** — BIP-340 sign/verify
- **ECDH** — compressed, x-only, raw shared secret
- **BIP-32** — HD key derivation (master/derive/path/privkey/pubkey)
- **Taproot** — output key tweaking, verification (BIP-341)
- **Addresses** — P2PKH, P2WPKH, P2TR
- **WIF** — encode/decode
- **Hashing** — SHA-256 (hardware-accelerated), HASH160, tagged hash
- **Key tweaking** — negate, add, multiply
- **ECDSA** -- sign, verify, recover, DER serialization (RFC 6979)
- **Schnorr** -- BIP-340 sign/verify
- **ECDH** -- compressed, x-only, raw shared secret
- **BIP-32** -- HD key derivation (master/derive/path/privkey/pubkey)
- **Taproot** -- output key tweaking, verification (BIP-341)
- **Addresses** -- P2PKH, P2WPKH, P2TR
- **WIF** -- encode/decode
- **Hashing** -- SHA-256 (hardware-accelerated), HASH160, tagged hash
- **Key tweaking** -- negate, add, multiply
## Quick Start

22
bindings/swift/README.md
View File

@ -1,18 +1,18 @@
# Ufsecp — Swift
# Ufsecp -- Swift
Swift binding for [UltrafastSecp256k1](https://github.com/shrec/UltrafastSecp256k1) — high-performance secp256k1 elliptic curve cryptography via C interop.
Swift binding for [UltrafastSecp256k1](https://github.com/shrec/UltrafastSecp256k1) -- high-performance secp256k1 elliptic curve cryptography via C interop.
## Features
- **ECDSA** — sign, verify, recover, DER serialization (RFC 6979)
- **Schnorr** — BIP-340 sign/verify
- **ECDH** — compressed, x-only, raw shared secret
- **BIP-32** — HD key derivation (master/derive/path/privkey/pubkey)
- **Taproot** — output key tweaking, verification (BIP-341)
- **Addresses** — P2PKH, P2WPKH, P2TR
- **WIF** — encode/decode
- **Hashing** — SHA-256 (hardware-accelerated), HASH160, tagged hash
- **Key tweaking** — negate, add, multiply
- **ECDSA** -- sign, verify, recover, DER serialization (RFC 6979)
- **Schnorr** -- BIP-340 sign/verify
- **ECDH** -- compressed, x-only, raw shared secret
- **BIP-32** -- HD key derivation (master/derive/path/privkey/pubkey)
- **Taproot** -- output key tweaking, verification (BIP-341)
- **Addresses** -- P2PKH, P2WPKH, P2TR
- **WIF** -- encode/decode
- **Hashing** -- SHA-256 (hardware-accelerated), HASH160, tagged hash
- **Key tweaking** -- negate, add, multiply
## Quick Start

22
build_pgo.ps1
View File

@ -1,7 +1,7 @@
# ============================================================================
# PGO (Profile-Guided Optimization) Build Script — Windows (MSVC / Clang-CL)
# PGO (Profile-Guided Optimization) Build Script -- Windows (MSVC / Clang-CL)
# ============================================================================
# Three-phase build: Instrument → Profile → Optimize
# Three-phase build: Instrument -> Profile -> Optimize
# Expected improvement: 10-25% on scalar multiplication hot paths.
#
# Usage: .\build_pgo.ps1 [-Compiler msvc|clang] [-Jobs 4]
@ -18,10 +18,10 @@ $ScriptDir = Split-Path -Parent $MyInvocation.MyCommand.Path
$BuildDir = Join-Path $ScriptDir "build/pgo"
$PGODir = Join-Path $BuildDir "pgo_profiles"
# ── Phase 1: Instrumentation ──────────────────────────────────────────────
# -- Phase 1: Instrumentation ----------------------------------------------
Write-Host "`n=============================================="
Write-Host " PGO Build — Phase 1: Instrumentation"
Write-Host " PGO Build -- Phase 1: Instrumentation"
Write-Host " Compiler: $Compiler"
Write-Host "==============================================`n"
@ -48,10 +48,10 @@ if ($LASTEXITCODE -ne 0) { throw "CMake configure failed" }
cmake --build $BuildDir --config Release -j $Jobs
if ($LASTEXITCODE -ne 0) { throw "Build (instrumented) failed" }
# ── Phase 2: Profiling ────────────────────────────────────────────────────
# -- Phase 2: Profiling ----------------------------------------------------
Write-Host "`n=============================================="
Write-Host " PGO Build — Phase 2: Profiling"
Write-Host " PGO Build -- Phase 2: Profiling"
Write-Host "==============================================`n"
# Run CTest to exercise hot paths
@ -66,10 +66,10 @@ Get-ChildItem -Path $BuildDir -Recurse -Filter "*bench*" |
& $_.FullName 2>$null
}
# ── Phase 3: Merge & Optimize ────────────────────────────────────────────
# -- Phase 3: Merge & Optimize --------------------------------------------
Write-Host "`n=============================================="
Write-Host " PGO Build — Phase 3: Optimize"
Write-Host " PGO Build -- Phase 3: Optimize"
Write-Host "==============================================`n"
if ($Compiler -eq "clang") {
@ -103,10 +103,10 @@ if ($LASTEXITCODE -ne 0) { throw "CMake configure (PGO-USE) failed" }
cmake --build $BuildDir --config Release -j $Jobs
if ($LASTEXITCODE -ne 0) { throw "Build (PGO-optimized) failed" }
# ── Verification ──────────────────────────────────────────────────────────
# -- Verification ----------------------------------------------------------
Write-Host "`n=============================================="
Write-Host " PGO Build — Verification"
Write-Host " PGO Build -- Verification"
Write-Host "==============================================`n"
ctest --test-dir $BuildDir -C Release --output-on-failure
@ -117,7 +117,7 @@ if ($LASTEXITCODE -eq 0) {
}
Write-Host "`n=============================================="
Write-Host " PGO Build — Complete!"
Write-Host " PGO Build -- Complete!"
Write-Host "=============================================="
Write-Host ""
Write-Host " Library: $BuildDir\libs\UltrafastSecp256k1\cpu\Release\fastsecp256k1.lib"

14
build_pgo.sh
View File

@ -1,6 +1,6 @@
#!/bin/bash
# ============================================================================
# PGO (Profile-Guided Optimization) Build Script — x86_64 / AArch64
# PGO (Profile-Guided Optimization) Build Script -- x86_64 / AArch64
# ============================================================================
# Three-phase build:
# 1. Instrument: compile with profiling hooks
@ -55,7 +55,7 @@ case "${COMPILER}" in
esac
echo "=============================================="
echo " PGO Build — Phase 1: Instrumentation"
echo " PGO Build -- Phase 1: Instrumentation"
echo " Compiler: ${CXX}"
echo "=============================================="
@ -75,7 +75,7 @@ cmake --build "${BUILD_DIR}" -j"${JOBS}"
echo ""
echo "=============================================="
echo " PGO Build — Phase 2: Profiling"
echo " PGO Build -- Phase 2: Profiling"
echo "=============================================="
# Run all available tests and benchmarks to exercise hot paths
@ -100,7 +100,7 @@ fi
echo ""
echo "=============================================="
echo " PGO Build — Phase 3: Merge & Optimize"
echo " PGO Build -- Phase 3: Merge & Optimize"
echo "=============================================="
if [[ "${COMPILER}" == "clang" ]]; then
@ -130,20 +130,20 @@ cmake --build "${BUILD_DIR}" -j"${JOBS}"
echo ""
echo "=============================================="
echo " PGO Build — Verification"
echo " PGO Build -- Verification"
echo "=============================================="
FAILURES=0
if ctest --test-dir "${BUILD_DIR}" --output-on-failure 2>/dev/null; then
echo " [OK] All tests pass with PGO build"
else
echo " [WARN] Some tests failed — check output above"
echo " [WARN] Some tests failed -- check output above"
FAILURES=1
fi
echo ""
echo "=============================================="
echo " PGO Build — Complete!"
echo " PGO Build -- Complete!"
echo "=============================================="
echo ""
echo " Library: ${BUILD_DIR}/libs/UltrafastSecp256k1/cpu/libfastsecp256k1.a"

8
compat/libsecp256k1_shim/CMakeLists.txt
View File

@ -4,7 +4,7 @@ project(secp256k1_shim LANGUAGES CXX)
set(CMAKE_CXX_STANDARD 20)
set(CMAKE_CXX_STANDARD_REQUIRED ON)
# ── Shim library ──────────────────────────────────────────────────────────────
# -- Shim library --------------------------------------------------------------
add_library(secp256k1_shim STATIC
src/shim_context.cpp
@ -16,7 +16,7 @@ add_library(secp256k1_shim STATIC
src/shim_tagged_hash.cpp
)
# Public includes — exposes libsecp256k1-compatible headers
# Public includes -- exposes libsecp256k1-compatible headers
target_include_directories(secp256k1_shim PUBLIC
${CMAKE_CURRENT_SOURCE_DIR}/include
)
@ -28,10 +28,10 @@ if(TARGET secp256k1_fast)
target_link_libraries(secp256k1_shim PRIVATE secp256k1_fast)
else()
# Fallback: expect the main library's include path
message(WARNING "secp256k1_fast target not found — add UltrafastSecp256k1 via add_subdirectory first")
message(WARNING "secp256k1_fast target not found -- add UltrafastSecp256k1 via add_subdirectory first")
endif()
# ── Optional: test that the shim compiles ─────────────────────────────────────
# -- Optional: test that the shim compiles -------------------------------------
option(SECP256K1_SHIM_BUILD_TESTS "Build shim tests" OFF)

20
compat/libsecp256k1_shim/README.md
View File

@ -10,14 +10,14 @@ Drop-in replacement for projects written against the libsecp256k1 C API. Link th
| Category | Functions | Status |
|---|---|---|
| Context | `create`, `destroy`, `randomize` | ✅ Stub (context is no-op) |
| Public Keys | `pubkey_create`, `pubkey_parse`, `pubkey_serialize`, `pubkey_negate`, `pubkey_tweak_add`, `pubkey_tweak_mul`, `pubkey_combine` | ✅ |
| ECDSA | `ecdsa_sign`, `ecdsa_verify`, `signature_parse_compact`, `signature_serialize_compact`, `signature_normalize` | ✅ |
| Schnorr (BIP-340) | `schnorrsig_sign32`, `schnorrsig_verify` | ✅ |
| Extra Keys | `xonly_pubkey_parse`, `xonly_pubkey_serialize`, `keypair_create` | ✅ |
| Secret Keys | `seckey_verify`, `seckey_negate`, `seckey_tweak_add`, `seckey_tweak_mul` | ✅ |
| DER Signatures | `signature_parse_der`, `signature_serialize_der` | ✅ |
| Tagged Hash | `tagged_sha256` | ✅ |
| Context | `create`, `destroy`, `randomize` | [OK] Stub (context is no-op) |
| Public Keys | `pubkey_create`, `pubkey_parse`, `pubkey_serialize`, `pubkey_negate`, `pubkey_tweak_add`, `pubkey_tweak_mul`, `pubkey_combine` | [OK] |
| ECDSA | `ecdsa_sign`, `ecdsa_verify`, `signature_parse_compact`, `signature_serialize_compact`, `signature_normalize` | [OK] |
| Schnorr (BIP-340) | `schnorrsig_sign32`, `schnorrsig_verify` | [OK] |
| Extra Keys | `xonly_pubkey_parse`, `xonly_pubkey_serialize`, `keypair_create` | [OK] |
| Secret Keys | `seckey_verify`, `seckey_negate`, `seckey_tweak_add`, `seckey_tweak_mul` | [OK] |
| DER Signatures | `signature_parse_der`, `signature_serialize_der` | [OK] |
| Tagged Hash | `tagged_sha256` | [OK] |
## Usage
@ -27,7 +27,7 @@ add_subdirectory(path/to/UltrafastSecp256k1/compat/libsecp256k1_shim)
target_link_libraries(my_app PRIVATE secp256k1_shim)
```
Then in your code — no changes needed:
Then in your code -- no changes needed:
```c
#include <secp256k1.h>
@ -40,7 +40,7 @@ secp256k1_context_destroy(ctx);
## Limitations
- Context randomization (`secp256k1_context_randomize`) is accepted but has no effect — UltrafastSecp256k1 does not use blinding.
- Context randomization (`secp256k1_context_randomize`) is accepted but has no effect -- UltrafastSecp256k1 does not use blinding.
- `secp256k1_context_static` is provided but points to a dummy.
- `secp256k1_ecdh` and `secp256k1_ellswift` modules are not yet shimmed.
- Performance characteristics differ (typically faster).

40
cpu/CMakeLists.txt
View File

@ -13,15 +13,15 @@ set(SECP256K1_LIB_NAME fastsecp256k1)
# Core sources (always available - Tier 1: Portable C++)
set(SECP256K1_SOURCES
src/field.cpp
src/field_52.cpp # 5×52 lazy-reduction field (hybrid scheme)
src/field_26.cpp # 10×26 lazy-reduction field (32-bit platforms)
src/field_52.cpp # 5x52 lazy-reduction field (hybrid scheme)
src/field_26.cpp # 10x26 lazy-reduction field (32-bit platforms)
src/scalar.cpp
src/point.cpp
src/precompute.cpp
src/field_asm.cpp # Tier 2: BMI2 intrinsics (runtime detection)
src/glv.cpp # GLV endomorphism optimization
src/selftest.cpp # Self-test with known arithmetic vectors
# Constant-Time (CT) layer — always compiled, no flags
# Constant-Time (CT) layer -- always compiled, no flags
src/ct_field.cpp # CT field arithmetic (side-channel resistant)
src/ct_scalar.cpp # CT scalar arithmetic
src/ct_point.cpp # CT point ops (complete addition, CT scalar_mul)
@ -42,12 +42,12 @@ set(SECP256K1_SOURCES
src/frost.cpp # FROST threshold signatures (t-of-n)
src/adaptor.cpp # Adaptor signatures (Schnorr + ECDSA)
src/address.cpp # Address generation + BIP-352 Silent Payments
# Coins layer — multi-coin infrastructure
# Coins layer -- multi-coin infrastructure
src/keccak256.cpp # Keccak-256 hash (Ethereum address derivation)
src/coin_address.cpp # Unified per-coin address generation
src/ethereum.cpp # Ethereum EIP-55 checksummed addresses
src/coin_hd.cpp # BIP-44 coin-type HD derivation
# Advanced algorithms — Pippenger MSM + Comb generator multiplication
# Advanced algorithms -- Pippenger MSM + Comb generator multiplication
src/pippenger.cpp # Pippenger bucket method MSM (n > 128)
src/ecmult_gen_comb.cpp # Lim-Lee comb method for fast k*G
)
@ -252,16 +252,16 @@ if(NOT TARGET ${SECP256K1_LIB_NAME})
# INTERFACE: propagate LTO + arch flags to ALL consumers automatically
# (any exe that links against this lib gets -flto=thin -fuse-ld=lld)
# CRITICAL: ARCH_FLAGS (e.g. -mcpu=sifive-u74) must be in link options
# because ThinLTO does final code generation at link time — without it
# because ThinLTO does final code generation at link time -- without it
# the linker uses generic scheduling, losing pipeline-specific gains.
# ARCH_FLAGS is added to link options later (after it's set).
target_compile_options(${SECP256K1_LIB_NAME} PRIVATE -flto=thin)
target_link_options(${SECP256K1_LIB_NAME} INTERFACE -flto=thin -fuse-ld=lld)
message(STATUS "Secp256k1: ✓ LTO ENABLED (ThinLTO with Clang + lld, INTERFACE propagated)")
message(STATUS "Secp256k1: OK LTO ENABLED (ThinLTO with Clang + lld, INTERFACE propagated)")
elseif(CMAKE_CXX_COMPILER_ID MATCHES "GNU")
target_compile_options(${SECP256K1_LIB_NAME} PRIVATE -flto)
target_link_options(${SECP256K1_LIB_NAME} INTERFACE -flto)
message(STATUS "Secp256k1: ✓ LTO ENABLED (GCC LTO, INTERFACE propagated)")
message(STATUS "Secp256k1: OK LTO ENABLED (GCC LTO, INTERFACE propagated)")
else()
message(STATUS "Secp256k1: LTO not available for compiler ${CMAKE_CXX_COMPILER_ID}")
endif()
@ -380,7 +380,7 @@ if(SECP256K1_HAS_ASM)
)
message(STATUS " -> field_mul: ~8ns (vs 27ns intrinsics, 40ns portable)")
message(STATUS " -> field_square: ~7ns (vs 21ns intrinsics, 35ns portable)")
message(STATUS " -> Expected K*Q: ~18-24 μs (vs 66 μs current)")
message(STATUS " -> Expected K*Q: ~18-24 us (vs 66 us current)")
endif()
# Enable fast modular reduction on x86_64 (even without ASM, uses BMI2 intrinsics)
@ -457,13 +457,13 @@ elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "aarch64|ARM64|arm64")
set(ARCH_FLAGS "-march=armv8-a+crypto")
endif()
elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "armv7|armeabi")
# Android ARMv7 (32-bit) — no __int128, uses NO_INT128 fallback
# Android ARMv7 (32-bit) -- no __int128, uses NO_INT128 fallback
set(ARCH_FLAGS "-march=armv7-a -mfpu=neon-vfpv4 -mfloat-abi=softfp")
add_compile_definitions(SECP256K1_NO_INT128=1)
message(STATUS "Secp256k1: Android ARMv7 target (32-bit, no __int128)")
elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "x86_64|AMD64|X64")
if(ANDROID)
# Android x86_64 emulator — no -march=native for cross-compile
# Android x86_64 emulator -- no -march=native for cross-compile
set(ARCH_FLAGS "-march=x86-64 -msse4.2")
message(STATUS "Secp256k1: Android x86_64 target (emulator)")
else()
@ -481,7 +481,7 @@ else()
set(ARCH_FLAGS "")
endif()
# GCC/Clang optimization flags (skip on MSVC — it uses /O2 /GL from top-level)
# GCC/Clang optimization flags (skip on MSVC -- it uses /O2 /GL from top-level)
if(CMAKE_CXX_COMPILER_ID MATCHES "GNU|Clang")
target_compile_options(${SECP256K1_LIB_NAME} PRIVATE
-O3 # Maximum optimization
@ -496,7 +496,7 @@ target_compile_options(${SECP256K1_LIB_NAME} PRIVATE
$<$<PLATFORM_ID:Linux>:-fno-plt> # No PLT (ELF/Linux only; skipped on macOS/Windows)
-ftree-vectorize # Auto-vectorization (AVX2/SSE/NEON)
# Note: LTO is controlled separately by SECP256K1_USE_LTO option
# Do NOT add -fno-lto here — it would override the LTO setting
# Do NOT add -fno-lto here -- it would override the LTO setting
)
# Propagate ARCH_FLAGS to consumers so their TU's also compile with -mcpu
# (important for header-only / inline code and for ThinLTO codegen at link time)
@ -595,17 +595,17 @@ if(BUILD_TESTING)
add_executable(bench_atomic_operations bench/bench_atomic_operations.cpp)
target_link_libraries(bench_atomic_operations PRIVATE ${SECP256K1_LIB_NAME})
# CT (Constant-Time) layer benchmark — fast:: vs ct:: overhead comparison
# CT (Constant-Time) layer benchmark -- fast:: vs ct:: overhead comparison
add_executable(bench_ct bench/bench_ct.cpp)
target_link_libraries(bench_ct PRIVATE ${SECP256K1_LIB_NAME})
# Field 5×52 vs 4×64 comparison benchmark (requires __uint128_t; skip on MSVC)
# Field 5x52 vs 4x64 comparison benchmark (requires __uint128_t; skip on MSVC)
if(NOT (MSVC AND NOT CMAKE_CXX_COMPILER_ID MATCHES "Clang"))
add_executable(bench_field_52 bench/bench_field_52.cpp)
target_link_libraries(bench_field_52 PRIVATE ${SECP256K1_LIB_NAME})
endif()
# Field 10×26 vs 4×64 comparison benchmark (32-bit platform target)
# Field 10x26 vs 4x64 comparison benchmark (32-bit platform target)
add_executable(bench_field_26 bench/bench_field_26.cpp)
target_link_libraries(bench_field_26 PRIVATE ${SECP256K1_LIB_NAME})
@ -628,7 +628,7 @@ if(BUILD_TESTING)
# Over-optimizing benchmark code can distort measurements (aggressive inlining, etc.)
endif()
# Tests — unified test runner
# Tests -- unified test runner
# Single binary runs library selftest + all test modules.
# Usage: run_selftest [smoke|ci|stress] [seed_hex]
if(BUILD_TESTING)
@ -681,7 +681,7 @@ if(BUILD_TESTING)
target_compile_definitions(test_hash_accel_standalone PRIVATE STANDALONE_TEST)
add_test(NAME hash_accel COMMAND test_hash_accel_standalone)
# Standalone 5×52 field test (requires __uint128_t; skip on MSVC)
# Standalone 5x52 field test (requires __uint128_t; skip on MSVC)
if(NOT (MSVC AND NOT CMAKE_CXX_COMPILER_ID MATCHES "Clang"))
add_executable(test_field_52_standalone
tests/test_field_52.cpp
@ -691,7 +691,7 @@ if(BUILD_TESTING)
add_test(NAME field_52 COMMAND test_field_52_standalone)
endif()
# Standalone 10×26 field test
# Standalone 10x26 field test
add_executable(test_field_26_standalone
tests/test_field_26.cpp
)
@ -756,7 +756,7 @@ if(BUILD_TESTING)
endif()
add_test(NAME ecc_properties COMMAND test_ecc_properties_standalone)
# ── Audit infrastructure lives in audit/ ──────────────────────────────
# -- Audit infrastructure lives in audit/ ------------------------------
# All audit-specific targets (unified_audit_runner, standalone CT/fuzz/
# differential/protocol tests) are defined in ../audit/CMakeLists.txt
# to keep the library source tree clean.

4
cpu/include/secp256k1/ct/ops.hpp
View File

@ -85,8 +85,8 @@ namespace secp256k1::ct {
inline std::uint64_t is_zero_mask(std::uint64_t v) noexcept {
#if defined(__riscv) && (__riscv_xlen == 64)
// RISC-V: seqz + neg produces fully branchless is-zero mask.
// seqz tmp, v → tmp = (v == 0) ? 1 : 0
// neg tmp, tmp → tmp = 0 - tmp (all-ones if was 1, zero if was 0)
// seqz tmp, v -> tmp = (v == 0) ? 1 : 0
// neg tmp, tmp -> tmp = 0 - tmp (all-ones if was 1, zero if was 0)
// asm volatile prevents the compiler from reasoning about the output,
// so downstream code stays branchless.
std::uint64_t mask;

4
cpu/include/secp256k1/ct_utils.hpp
View File

@ -181,7 +181,7 @@ inline int ct_compare(const void* a, const void* b, std::size_t len) noexcept {
// ---- Fast path: 32 bytes (fully unrolled, zero branches) ----
// Algorithm: reverse-scan accumulation.
// Process words 3→2→1→0 (least significant first).
// Process words 3->2->1->0 (least significant first).
// Each differing word OVERRIDES the running result.
// Final result reflects the FIRST (most significant) differing word.
// value_barrier after every step prevents Clang from injecting
@ -230,7 +230,7 @@ inline int ct_compare(const void* a, const void* b, std::size_t len) noexcept {
}
ct::value_barrier(result);
// Word 0 (bytes 0-7, most significant — overrides all)
// Word 0 (bytes 0-7, most significant -- overrides all)
{
std::uint64_t gt, lt;
ct_cmp_pair(w0a, w0b, gt, lt);

10
cpu/include/secp256k1/debug_invariants.hpp
View File

@ -1,6 +1,6 @@
// ============================================================================
// Debug Invariant Assertions for Hot Paths
// Phase V, Task 5.3.3 — Compile-time gated, zero overhead in release
// Phase V, Task 5.3.3 -- Compile-time gated, zero overhead in release
// ============================================================================
// Include this header in source files that need debug-mode invariant checking.
//
@ -32,7 +32,7 @@
#include <cstdlib>
#include <cstdint>
// ── Release builds: zero overhead ────────────────────────────────────────
// -- Release builds: zero overhead ----------------------------------------
#if defined(NDEBUG) && !defined(SECP256K1_FORCE_INVARIANTS)
@ -47,7 +47,7 @@
#define SECP_DEBUG_COUNTER_INC(name) ((void)0)
#define SECP_DEBUG_COUNTER_REPORT() ((void)0)
// ── Debug builds: full checking ──────────────────────────────────────────
// -- Debug builds: full checking ------------------------------------------
#else
@ -76,7 +76,7 @@ inline bool is_normalized_field_element(const FieldElement& fe) noexcept {
if (l[i] < P[i]) return true;
if (l[i] > P[i]) return false;
}
// Equal to p — not canonical (should be reduced to 0)
// Equal to p -- not canonical (should be reduced to 0)
return false;
}
@ -141,7 +141,7 @@ inline DebugCounters& counters() noexcept {
} // namespace secp256k1::fast::debug
// ── Assertion macros ────────────────────────────────────────────────────
// -- Assertion macros ----------------------------------------------------
#define SECP_ASSERT(expr) do { \
if (!(expr)) { \

2
cpu/include/secp256k1/tagged_hash.hpp
View File

@ -2,7 +2,7 @@
#define SECP256K1_TAGGED_HASH_HPP
// ============================================================================
// BIP-340 Tagged Hash — Shared Utilities
// BIP-340 Tagged Hash -- Shared Utilities
// ============================================================================
// Provides cached tagged-hash midstates for BIP-340 (Schnorr) operations.
// Used by both schnorr.cpp (fast path) and ct_sign.cpp (CT path).

2
cpu/src/address.cpp
View File

@ -167,7 +167,7 @@ static int base58_char_value(char c) {
}
std::string base58check_encode(const std::uint8_t* data, std::size_t len) {
// Guard against size_t overflow in (len + 4) — silences GCC -Wstringop-overflow
// Guard against size_t overflow in (len + 4) -- silences GCC -Wstringop-overflow
if (len == 0 || len > 0x7FFFFFFFUL) return {};
// Append 4-byte checksum

2
cpu/src/bip32.cpp
View File

@ -222,7 +222,7 @@ fast::Point ExtendedKey::public_key() const {
return Point::generator().scalar_mul(sk);
}
// Public key: decompress from pub_prefix + key (x-coordinate)
// y² = x³ + 7, then pick y matching parity
// y^2 = x^3 + 7, then pick y matching parity
auto x = fast::FieldElement::from_bytes(key);
auto x2 = x * x;
auto x3 = x2 * x;

6
cpu/src/ct_sign.cpp
View File

@ -1,5 +1,5 @@
// ============================================================================
// ct_sign.cpp — Constant-Time Signing Functions
// ct_sign.cpp -- Constant-Time Signing Functions
// ============================================================================
// Drop-in CT replacements for ecdsa_sign() and schnorr_sign().
// Uses ct::generator_mul() (data-independent execution trace) for all
@ -33,7 +33,7 @@ ECDSASignature ecdsa_sign(const std::array<uint8_t, 32>& msg_hash,
auto k = rfc6979_nonce(private_key, msg_hash);
if (k.is_zero()) return {Scalar::zero(), Scalar::zero()};
// R = k * G — CT path
// R = k * G -- CT path
auto R = ct::generator_mul(k);
if (R.is_infinity()) return {Scalar::zero(), Scalar::zero()};
@ -114,7 +114,7 @@ SchnorrSignature schnorr_sign(const SchnorrKeypair& kp,
auto k_prime = Scalar::from_bytes(rand_hash);
if (k_prime.is_zero()) return SchnorrSignature{};
// Step 3: R = k' * G — CT path
// Step 3: R = k' * G -- CT path
auto R = ct::generator_mul(k_prime);
auto [rx, r_y_odd] = R.x_bytes_and_parity();

6
cpu/src/precompute.cpp
View File

@ -89,7 +89,7 @@
#include <iomanip>
#endif
// RDTSC benchmark helper — only compiled when profiling is enabled
// RDTSC benchmark helper -- only compiled when profiling is enabled
#if SECP256K1_PROFILE_DECOMP
#if (defined(__x86_64__) || defined(_M_X64)) && (defined(__GNUC__) || defined(__clang__))
static inline uint64_t RDTSC() {
@ -417,7 +417,7 @@ static void mul64x64(std::uint64_t a, std::uint64_t b, std::uint64_t& lo, std::u
}
[[nodiscard]] UInt128 multiply_u64(std::uint64_t a, std::uint64_t b) {
// _umul128 dispatches to platform-optimal 64×64→128 multiply
// _umul128 dispatches to platform-optimal 64x64->128 multiply
// (MSVC intrinsic, __int128, or portable 32-bit fallback)
uint64_t hi = 0;
const uint64_t lo = _umul128(a, b, &hi);
@ -1412,7 +1412,7 @@ constexpr std::array<std::uint8_t, 32> kB2MagBytes{
// Multiply two 64-bit numbers to get 128-bit result
static void mul64x64(std::uint64_t a, std::uint64_t b, std::uint64_t& lo, std::uint64_t& hi) {
// _umul128 dispatches to platform-optimal 64×64→128 multiply
// _umul128 dispatches to platform-optimal 64x64->128 multiply
lo = _umul128(a, b, &hi);
}

2
cpu/src/selftest.cpp
View File

@ -1229,7 +1229,7 @@ static inline void tally(int& total, int& passed,
}
}
// Platform string (compile-time) — used by selftest_report (upcoming)
// Platform string (compile-time) -- used by selftest_report (upcoming)
[[maybe_unused]] static const char* get_platform_string() {
#if defined(_WIN64)
return "Windows x64";

14
cpu/tests/test_bip32_vectors.cpp
View File

@ -1,12 +1,12 @@
// ============================================================================
// Test: BIP-32 Official Test Vectors (TV1–TV5)
// Test: BIP-32 Official Test Vectors (TV1-TV5)
// ============================================================================
// Source: https://github.com/bitcoin/bips/blob/master/bip-0032.mediawiki
//
// TV1: 128-bit seed → 5 derivation levels
// TV2: 512-bit seed → 5 derivation levels
// TV3: 128-bit seed → 2 levels (tests zero-padding of private key)
// TV4: 128-bit seed → 2 levels (same as TV3 but public derivation)
// TV1: 128-bit seed -> 5 derivation levels
// TV2: 512-bit seed -> 5 derivation levels
// TV3: 128-bit seed -> 2 levels (tests zero-padding of private key)
// TV4: 128-bit seed -> 2 levels (same as TV3 but public derivation)
// TV5: zero leading bytes in serialized key test
//
// Each vector verifies the full derivation chain:
@ -58,8 +58,8 @@ static void hex_to_bytes(const char* hex, std::uint8_t* out, std::size_t len) {
struct ChainVector {
const char* path; // e.g. "m", "m/0'", "m/0'/1", ...
const char* chain_code; // 64 hex chars (32 bytes)
const char* priv_key; // 64 hex chars (32 bytes) — private key bytes
const char* pub_key; // 66 hex chars (33 bytes) — compressed pubkey
const char* priv_key; // 64 hex chars (32 bytes) -- private key bytes
const char* pub_key; // 66 hex chars (33 bytes) -- compressed pubkey
};
static void verify_chain(const ExtendedKey& master,

20
cpu/tests/test_ct_equivalence.cpp
View File

@ -1,8 +1,8 @@
// ============================================================================
// test_ct_equivalence.cpp — FAST ≡ CT Property-Based Equivalence Tests
// test_ct_equivalence.cpp -- FAST == CT Property-Based Equivalence Tests
// ============================================================================
// Verifies that CT and FAST functions return bit-identical results on:
// 1. Boundary scalars (0, 1, 2, n−1, n−2, (n+1)/2)
// 1. Boundary scalars (0, 1, 2, n-1, n-2, (n+1)/2)
// 2. Random 256-bit scalars (property-based)
// 3. ECDSA sign equivalence (random keys + messages)
// 4. Schnorr sign equivalence (random keys + messages)
@ -10,7 +10,7 @@
// 6. Group law invariants via CT (add/double/inverse)
//
// This test is the formal proof that the dual-layer FAST/CT architecture
// maintains semantic equivalence — the cornerstone of SECURITY_CLAIMS.md.
// maintains semantic equivalence -- the cornerstone of SECURITY_CLAIMS.md.
// ============================================================================
#include "secp256k1/fast.hpp"
@ -145,7 +145,7 @@ static void test_boundary_generator_mul() {
}
// ============================================================================
// 2. Property-based: random scalars × G
// 2. Property-based: random scalars x G
// ============================================================================
static void test_random_generator_mul() {
std::cout << "--- Property: 64 random ct::generator_mul vs fast ---\n";
@ -162,7 +162,7 @@ static void test_random_generator_mul() {
}
// ============================================================================
// 3. Property-based: random scalars × arbitrary P (ct::scalar_mul)
// 3. Property-based: random scalars x arbitrary P (ct::scalar_mul)
// ============================================================================
static void test_random_scalar_mul() {
std::cout << "--- Property: 64 random ct::scalar_mul(P, k) vs fast ---\n";
@ -204,7 +204,7 @@ static void test_random_scalar_mul() {
}
// ============================================================================
// 4. Boundary scalar × arbitrary P
// 4. Boundary scalar x arbitrary P
// ============================================================================
static void test_boundary_scalar_mul() {
std::cout << "--- Boundary: ct::scalar_mul edge scalars ---\n";
@ -248,7 +248,7 @@ static void test_boundary_scalar_mul() {
// 5. ECDSA sign equivalence: 32 random key+msg pairs
// ============================================================================
static void test_ecdsa_sign_equivalence() {
std::cout << "--- Property: 32 random ECDSA sign CT≡FAST ---\n";
std::cout << "--- Property: 32 random ECDSA sign CT==FAST ---\n";
TestRng rng(0xEC05Au);
PT G = PT::generator();
@ -276,7 +276,7 @@ static void test_ecdsa_sign_equivalence() {
// 6. Schnorr sign equivalence: 32 random key+msg pairs
// ============================================================================
static void test_schnorr_sign_equivalence() {
std::cout << "--- Property: 32 random Schnorr sign CT≡FAST ---\n";
std::cout << "--- Property: 32 random Schnorr sign CT==FAST ---\n";
TestRng rng(0x5CA00Bu);
@ -310,7 +310,7 @@ static void test_schnorr_sign_equivalence() {
// 7. Schnorr pubkey equivalence: boundary + random
// ============================================================================
static void test_schnorr_pubkey_equivalence() {
std::cout << "--- Schnorr pubkey CT≡FAST (boundary + random) ---\n";
std::cout << "--- Schnorr pubkey CT==FAST (boundary + random) ---\n";
// k=1
{
@ -395,7 +395,7 @@ static void test_ct_group_law() {
// ============================================================================
int test_ct_equivalence_run() {
std::cout << "=== FAST ≡ CT Equivalence Tests ===\n\n";
std::cout << "=== FAST == CT Equivalence Tests ===\n\n";
test_boundary_generator_mul();
test_random_generator_mul();

10
cpu/tests/test_ecc_properties.cpp
View File

@ -18,7 +18,7 @@
// 12. Sub consistency: P - Q == P + (-Q)
//
// Uses deterministic pseudo-random scalars derived from a simple hash of
// the iteration index — fully reproducible, no external PRNG dependency.
// the iteration index -- fully reproducible, no external PRNG dependency.
// ============================================================================
#include "secp256k1/point.hpp"
@ -31,7 +31,7 @@
using namespace secp256k1::fast;
// ── helpers ─────────────────────────────────────────────────────────────────
// -- helpers -----------------------------------------------------------------
static int tests_run = 0;
static int tests_passed = 0;
@ -48,7 +48,7 @@ static bool points_equal(const Point& a, const Point& b) {
}
// Deterministic scalar from index: SHA256-like mixing of 'seed' bits.
// Not cryptographically random — that's intentional: reproducibility > entropy.
// Not cryptographically random -- that's intentional: reproducibility > entropy.
static Scalar deterministic_scalar(uint64_t idx) {
// Knuth multiplicative hash + bit mixing
uint64_t h = idx * 0x9E3779B97F4A7C15ULL;
@ -86,7 +86,7 @@ static Point deterministic_point(uint64_t idx) {
return Point::generator().scalar_mul(k);
}
// ── property tests ──────────────────────────────────────────────────────────
// -- property tests ----------------------------------------------------------
static void test_identity_element() {
printf("\n--- Identity element: P + O == P ---\n");
@ -414,7 +414,7 @@ static void test_dual_scalar_mul() {
}
}
// ── entry points ────────────────────────────────────────────────────────────
// -- entry points ------------------------------------------------------------
int test_ecc_properties_run() {
printf("\n================================================================\n");

2
cuda/CMakeLists.txt
View File

@ -26,7 +26,7 @@ set(CMAKE_CXX_STANDARD 17)
include_directories(include ${CMAKE_CURRENT_SOURCE_DIR}/../include)
# Source files — .cu extension works with both nvcc and hipcc
# Source files -- .cu extension works with both nvcc and hipcc
set(_GPU_SOURCES src/secp256k1.cu)
# Library target

94
cuda/README.md
View File

@ -1,8 +1,8 @@
# Secp256k1 CUDA — GPU ECC Library
# Secp256k1 CUDA -- GPU ECC Library
> **English summary**: Full secp256k1 ECC library for NVIDIA GPUs — header-only core with PTX inline assembly. Supports CUDA and ROCm/HIP (via `gpu_compat.h` abstraction layer). Priority: maximum throughput for batch operations. Not side-channel resistant (research/development use). See [docs/API_REFERENCE.md](../docs/API_REFERENCE.md) for the full API and [docs/BUILDING.md](../docs/BUILDING.md) for build instructions.
> **English summary**: Full secp256k1 ECC library for NVIDIA GPUs -- header-only core with PTX inline assembly. Supports CUDA and ROCm/HIP (via `gpu_compat.h` abstraction layer). Priority: maximum throughput for batch operations. Not side-channel resistant (research/development use). See [docs/API_REFERENCE.md](../docs/API_REFERENCE.md) for the full API and [docs/BUILDING.md](../docs/BUILDING.md) for build instructions.
Full secp256k1 ECC library for NVIDIA GPUs — header-only core with PTX inline assembly.
Full secp256k1 ECC library for NVIDIA GPUs -- header-only core with PTX inline assembly.
**Priority**: Maximum throughput for batch operations. Not side-channel resistant (research/dev use).
@ -10,17 +10,17 @@ Full secp256k1 ECC library for NVIDIA GPUs — header-only core with PTX inline
## Architecture
All code resides in the `secp256k1::cuda` namespace. The core is **header-only** — `secp256k1.cuh` contains all device functions. Data types are interoperable with the CPU library (`secp256k1/types.hpp` POD structs).
All code resides in the `secp256k1::cuda` namespace. The core is **header-only** -- `secp256k1.cuh` contains all device functions. Data types are interoperable with the CPU library (`secp256k1/types.hpp` POD structs).
### Compile-Time Configuration (3 backends)
| Macro | Default | Description |
|-------|---------|--------|
| `SECP256K1_CUDA_USE_HYBRID_MUL` | **ON** | 32-bit Comba mul + 64-bit reduction (1.10× faster) |
| `SECP256K1_CUDA_USE_HYBRID_MUL` | **ON** | 32-bit Comba mul + 64-bit reduction (1.10x faster) |
| `SECP256K1_CUDA_USE_MONTGOMERY` | OFF | Montgomery residue domain (mont_reduce_512) |
| `SECP256K1_CUDA_LIMBS_32` | OFF | Full 8×32-bit limbs (separate backend) |
| `SECP256K1_CUDA_LIMBS_32` | OFF | Full 8x32-bit limbs (separate backend) |
**Default path** (64-bit hybrid): `field_mul` → `field_mul_hybrid` → 32-bit Comba PTX → `reduce_512_to_256`
**Default path** (64-bit hybrid): `field_mul` -> `field_mul_hybrid` -> 32-bit Comba PTX -> `reduce_512_to_256`
---
@ -28,7 +28,7 @@ All code resides in the `secp256k1::cuda` namespace. The core is **header-only**
### Field Arithmetic (Fp)
- **add/sub**: PTX inline asm with carry chains (ADDC.CC/SUBC.CC)
- **mul**: 32-bit Comba hybrid → 64-bit secp256k1 fast reduction (P = 2²⁵⁶ − 2³² − 977)
- **mul**: 32-bit Comba hybrid -> 64-bit secp256k1 fast reduction (P = 2^2⁵⁶ - 2^3^2 - 977)
- **sqr**: Optimized squaring (cross-product doubling)
- **inverse**: Fermat chain `a^{p-2}` (255 sqr + 16 mul)
- **mul_small**: Multiplication by uint32 (for reduction constants)
@ -41,13 +41,13 @@ All code resides in the `secp256k1::cuda` namespace. The core is **header-only**
### Point Operations (Jacobian coordinates)
- **doubling**: `dbl-2001-b` (3M+4S, a=0 curves)
- **mixed addition**: 6 variants optimized for different scenarios:
- `jacobian_add_mixed` — madd-2007-bl (7M+4S) general
- `jacobian_add_mixed_h` — madd-2004-hmv (8M+3S), H output for batch inversion
- `jacobian_add_mixed_h_z1` — Z=1 specialized (5M+2S), first step
- `jacobian_add_mixed_const` — branchless (8M+3S), constant-point
- `jacobian_add_mixed_const_7m4s` — branchless 7M+4S + 2H output
- `jacobian_add_mixed` -- madd-2007-bl (7M+4S) general
- `jacobian_add_mixed_h` -- madd-2004-hmv (8M+3S), H output for batch inversion
- `jacobian_add_mixed_h_z1` -- Z=1 specialized (5M+2S), first step
- `jacobian_add_mixed_const` -- branchless (8M+3S), constant-point
- `jacobian_add_mixed_const_7m4s` -- branchless 7M+4S + 2H output
- **general add**: `jacobian_add` (11M+5S, Jacobian + Jacobian)
- **GLV endomorphism**: `apply_endomorphism` φ(x,y) = (β·x, y)
- **GLV endomorphism**: `apply_endomorphism` phi(x,y) = (beta*x, y)
### Scalar Multiplication
- **double-and-add**: Simple, register-efficient (wNAF is expensive on GPU due to register pressure)
@ -59,10 +59,10 @@ All code resides in the `secp256k1::cuda` namespace. The core is **header-only**
- **naive**: Direct GCD (debug/reference)
### Hash160 (SHA-256 + RIPEMD-160)
- `hash160_pubkey_kernel` — pubkey → Hash160 device-side
- `hash160_pubkey_kernel` -- pubkey -> Hash160 device-side
### Bloom Filter
- `DeviceBloom` — FNV-1a + SplitMix hashing
- `DeviceBloom` -- FNV-1a + SplitMix hashing
- `test` / `add` device functions + batch kernels
---
@ -71,22 +71,22 @@ All code resides in the `secp256k1::cuda` namespace. The core is **header-only**
```
cuda/
├── CMakeLists.txt # Build: lib + test + bench
├── README.md
├── include/
│ ├── secp256k1.cuh # Core — field/point/scalar device functions (1800+ lines)
│ ├── ptx_math.cuh # PTX inline asm (256×256→512 Comba multiply)
│ ├── secp256k1_32.cuh # Alternative: 8×32-bit limbs + Montgomery backend
│ ├── secp256k1_32_hybrid_final.cuh # 32-bit Comba mul → 64-bit reduction (default mul path)
│ ├── batch_inversion.cuh # Montgomery trick / Fermat / naive batch inverse
│ ├── bloom.cuh # Device-side Bloom filter (FNV-1a + SplitMix)
│ ├── hash160.cuh # SHA-256 + RIPEMD-160 → Hash160
│ ├── host_helpers.cuh # Host-side wrappers (1-thread kernels, test-only)
│ └── gpu_compat.h # CUDA ↔ HIP (ROCm) compatibility layer
├── src/
│ ├── secp256k1.cu # Kernel definitions (thin wrappers)
│ ├── test_suite.cu # 30 vector tests
│ └── bench_cuda.cu # Benchmark harness
+-- CMakeLists.txt # Build: lib + test + bench
+-- README.md
+-- include/
| +-- secp256k1.cuh # Core -- field/point/scalar device functions (1800+ lines)
| +-- ptx_math.cuh # PTX inline asm (256x256->512 Comba multiply)
| +-- secp256k1_32.cuh # Alternative: 8x32-bit limbs + Montgomery backend
| +-- secp256k1_32_hybrid_final.cuh # 32-bit Comba mul -> 64-bit reduction (default mul path)
| +-- batch_inversion.cuh # Montgomery trick / Fermat / naive batch inverse
| +-- bloom.cuh # Device-side Bloom filter (FNV-1a + SplitMix)
| +-- hash160.cuh # SHA-256 + RIPEMD-160 -> Hash160
| +-- host_helpers.cuh # Host-side wrappers (1-thread kernels, test-only)
| +-- gpu_compat.h # CUDA <-> HIP (ROCm) compatibility layer
+-- src/
| +-- secp256k1.cu # Kernel definitions (thin wrappers)
| +-- test_suite.cu # 30 vector tests
| +-- bench_cuda.cu # Benchmark harness
```
---
@ -111,9 +111,9 @@ cmake --build cuda/build -j
|--------|---------|-------------|
| `CMAKE_CUDA_ARCHITECTURES` | 89 (Ada) | NVIDIA GPU architecture (75/80/86/89/90) |
| `SECP256K1_CUDA_USE_MONTGOMERY` | OFF | Montgomery domain |
| `SECP256K1_CUDA_LIMBS_32` | OFF | 8×32-bit limb backend |
| `SECP256K1_CUDA_LIMBS_32` | OFF | 8x32-bit limb backend |
| `SECP256K1_BUILD_ROCM` | OFF | AMD ROCm/HIP build (portable math) |
| `CMAKE_HIP_ARCHITECTURES` | — | AMD GPU architectures (gfx906/gfx1030/gfx1100/...) |
| `CMAKE_HIP_ARCHITECTURES` | -- | AMD GPU architectures (gfx906/gfx1030/gfx1100/...) |
### Requirements
- **NVIDIA**: CUDA Toolkit 12.0+, GPU Compute Capability 7.0+ (Volta+), CMake 3.18+
@ -133,7 +133,7 @@ cmake --build build-rocm -j
```
> **Note**: In ROCm builds, PTX inline asm is automatically replaced with portable
> `__int128` fallbacks (`gpu_compat.h` → `SECP256K1_USE_PTX=0`).
> `__int128` fallbacks (`gpu_compat.h` -> `SECP256K1_USE_PTX=0`).
> The 32-bit hybrid mul backend (PTX-dependent) is automatically disabled on HIP.
---
@ -151,7 +151,7 @@ __global__ void my_kernel(const Scalar* scalars, JacobianPoint* results, int n)
int idx = blockIdx.x * blockDim.x + threadIdx.x;
if (idx >= n) return;
// G * k — GENERATOR_JACOBIAN is embedded at compile time
// G * k -- GENERATOR_JACOBIAN is embedded at compile time
JacobianPoint G = GENERATOR_JACOBIAN;
scalar_mul(&G, &scalars[idx], &results[idx]);
}
@ -185,13 +185,13 @@ cudaDeviceSynchronize();
- Scalar arithmetic: add, sub, boundary
- Point operations: doubling, mixed addition, identity
- Scalar multiplication: known vectors, generator mul
- GLV endomorphism: φ(φ(P)) + P = -φ(P)
- GLV endomorphism: phi(phi(P)) + P = -phi(P)
- Batch inversion: Montgomery trick correctness
- Cross-backend: CPU ↔ CUDA result comparison
- Cross-backend: CPU <-> CUDA result comparison
---
## CPU ↔ CUDA Compatibility
## CPU <-> CUDA Compatibility
Data types share layout via `secp256k1/types.hpp`:
@ -208,19 +208,19 @@ CPU-computed data transfers directly to GPU via `cudaMemcpy` (little-endian, sam
## Cross-Platform Benchmarks
### Android ARM64 — RK3588 (Cortex-A55/A76), ARM64 inline ASM (MUL/UMULH)
### Android ARM64 -- RK3588 (Cortex-A55/A76), ARM64 inline ASM (MUL/UMULH)
| Operation | Time |
|-----------|------|
| field_mul (a*b mod p) | 85 ns |
| field_sqr (a² mod p) | 66 ns |
| field_sqr (a^2 mod p) | 66 ns |
| field_add (a+b mod p) | 18 ns |
| field_sub (a-b mod p) | 16 ns |
| field_inverse | 2,621 ns |
| **fast scalar_mul (k*G)** | **7.6 μs** |
| fast scalar_mul (k*P) | 77.6 μs |
| CT scalar_mul (k*G) | 545 μs |
| ECDH (full CT) | 545 μs |
| **fast scalar_mul (k*G)** | **7.6 us** |
| fast scalar_mul (k*P) | 77.6 us |
| CT scalar_mul (k*G) | 545 us |
| ECDH (full CT) | 545 us |
> Backend: ARM64 inline assembly (MUL/UMULH). ~5x faster than generic C++.
@ -228,7 +228,7 @@ CPU-computed data transfers directly to GPU via `cudaMemcpy` (little-endian, sam
## License
AGPL-3.0 — see [LICENSE](../LICENSE)
AGPL-3.0 -- see [LICENSE](../LICENSE)
---
@ -240,4 +240,4 @@ AGPL-3.0 — see [LICENSE](../LICENSE)
---
*UltrafastSecp256k1 v3.0.0 — CUDA/ROCm GPU Library*
*UltrafastSecp256k1 v3.0.0 -- CUDA/ROCm GPU Library*

54
cuda/include/affine_add.cuh
View File

@ -4,14 +4,14 @@
// Pure affine-coordinate arithmetic: no Z coordinate, no projective overhead.
//
// When both points are in affine form (Z=1), the addition formula is:
// λ = (Q.y - P.y) / (Q.x - P.x) [= rr * H^{-1}]
// X3 = λ² - P.x - Q.x [1S + 2 subs]
// Y3 = λ·(P.x - X3) - P.y [1M + 1 sub]
// lambda = (Q.y - P.y) / (Q.x - P.x) [= rr * H^{-1}]
// X3 = lambda^2 - P.x - Q.x [1S + 2 subs]
// Y3 = lambda*(P.x - X3) - P.y [1M + 1 sub]
//
// Cost per addition: 1M (λ=rr*h_inv) + 1S (λ²) + 1M (λ*(Px-X3)) = 2M + 1S
// Cost per addition: 1M (lambda=rr*h_inv) + 1S (lambda^2) + 1M (lambda*(Px-X3)) = 2M + 1S
// With batch inversion: 1M + 1S per slot (the inversion is amortized).
//
// Comparison vs Jacobian mixed add (8M + 3S): ~3.5× fewer operations per add.
// Comparison vs Jacobian mixed add (8M + 3S): ~3.5x fewer operations per add.
// =============================================================================
#pragma once
@ -21,8 +21,8 @@ namespace secp256k1{
namespace cuda {
// ---------------------------------------------------------------------------
// affine_add: P + Q → R, all affine (2M + 1S total)
// Caller must ensure P.x ≠ Q.x (no doubling, no identity).
// affine_add: P + Q -> R, all affine (2M + 1S total)
// Caller must ensure P.x != Q.x (no doubling, no identity).
// For batch pipelines where all points are distinct by construction.
// ---------------------------------------------------------------------------
__device__ __forceinline__ void affine_add(
@ -34,21 +34,21 @@ __device__ __forceinline__ void affine_add(
field_sub(qx, px, &h); // H = Q.x - P.x
field_sub(qy, py, &rr); // rr = Q.y - P.y
field_inv(&h, &t); // t = H^{-1} (expensive — use batch version below)
field_mul(&rr, &t, &lambda); // λ = rr / H [1M]
field_inv(&h, &t); // t = H^{-1} (expensive -- use batch version below)
field_mul(&rr, &t, &lambda); // lambda = rr / H [1M]
field_sqr(&lambda, rx); // X3 = λ² [1S]
field_sqr(&lambda, rx); // X3 = lambda^2 [1S]
field_sub(rx, px, rx); // X3 -= P.x
field_sub(rx, qx, rx); // X3 -= Q.x
field_sub(px, rx, ry); // t = P.x - X3
field_mul(&lambda, ry, ry); // Y3 = λ·(P.x - X3) [1M]
field_mul(&lambda, ry, ry); // Y3 = lambda*(P.x - X3) [1M]
field_sub(ry, py, ry); // Y3 -= P.y
}
// ---------------------------------------------------------------------------
// affine_add_x_only: P + Q → X3 only (1M + 1S with pre-inverted H)
// Returns only the X coordinate — for search pipelines where Y is not needed.
// affine_add_x_only: P + Q -> X3 only (1M + 1S with pre-inverted H)
// Returns only the X coordinate -- for search pipelines where Y is not needed.
// h_inv: precomputed (Q.x - P.x)^{-1} from batch inversion
// ---------------------------------------------------------------------------
__device__ __forceinline__ void affine_add_x_only(
@ -60,15 +60,15 @@ __device__ __forceinline__ void affine_add_x_only(
FieldElement rr, lambda;
field_sub(qy, py, &rr); // rr = Q.y - P.y
field_mul(&rr, h_inv, &lambda); // λ = rr * H^{-1} [1M]
field_mul(&rr, h_inv, &lambda); // lambda = rr * H^{-1} [1M]
field_sqr(&lambda, rx); // X3 = λ² [1S]
field_sqr(&lambda, rx); // X3 = lambda^2 [1S]
field_sub(rx, px, rx); // X3 -= P.x
field_sub(rx, qx, rx); // X3 -= Q.x
}
// ---------------------------------------------------------------------------
// affine_add_lambda: P + Q → (X3, Y3) with pre-inverted H (2M + 1S)
// affine_add_lambda: P + Q -> (X3, Y3) with pre-inverted H (2M + 1S)
// Full addition with precomputed H^{-1} from batch inversion.
// ---------------------------------------------------------------------------
__device__ __forceinline__ void affine_add_lambda(
@ -80,20 +80,20 @@ __device__ __forceinline__ void affine_add_lambda(
FieldElement rr, lambda;
field_sub(qy, py, &rr); // rr = Q.y - P.y
field_mul(&rr, h_inv, &lambda); // λ = rr * H^{-1} [1M]
field_mul(&rr, h_inv, &lambda); // lambda = rr * H^{-1} [1M]
field_sqr(&lambda, rx); // X3 = λ² [1S]
field_sqr(&lambda, rx); // X3 = lambda^2 [1S]
field_sub(rx, px, rx); // X3 -= P.x
field_sub(rx, qx, rx); // X3 -= Q.x
field_sub(px, rx, ry); // t = P.x - X3
field_mul(&lambda, ry, ry); // Y3 = λ·(P.x - X3) [1M]
field_mul(&lambda, ry, ry); // Y3 = lambda*(P.x - X3) [1M]
field_sub(ry, py, ry); // Y3 -= P.y
}
// ---------------------------------------------------------------------------
// affine_compute_h: compute H = Q.x - P.x for batch inversion
// Just a subtraction — essentially free.
// Just a subtraction -- essentially free.
// ---------------------------------------------------------------------------
__device__ __forceinline__ void affine_compute_h(
const FieldElement* __restrict__ px,
@ -104,13 +104,13 @@ __device__ __forceinline__ void affine_compute_h(
}
// ---------------------------------------------------------------------------
// Batch Inversion (Montgomery's trick) — in-place
// Batch Inversion (Montgomery's trick) -- in-place
// ---------------------------------------------------------------------------
// Input: h[0..n-1] = H values
// Output: h[0..n-1] = H^{-1} values
// Temp: prefix[0..n-1] = scratch buffer (same size as h)
//
// Cost: 3(n-1) multiplications + 1 field_inv ≈ 3n + 300 M-eq
// Cost: 3(n-1) multiplications + 1 field_inv ~= 3n + 300 M-eq
//
// This is a device function for use WITHIN a single thread.
// For a kernel version, build prefix products per-thread over strided data.
@ -143,7 +143,7 @@ __device__ __forceinline__ void affine_batch_inv_serial(
}
// ---------------------------------------------------------------------------
// Jacobian → Affine conversion (single point, in-place on x/y)
// Jacobian -> Affine conversion (single point, in-place on x/y)
// ---------------------------------------------------------------------------
__device__ __forceinline__ void jacobian_to_affine(
FieldElement* __restrict__ x,
@ -163,13 +163,13 @@ __device__ __forceinline__ void jacobian_to_affine(
}
// ---------------------------------------------------------------------------
// Batch Jacobian → Affine (batch of Z values → Z^{-2}, Z^{-3})
// Batch Jacobian -> Affine (batch of Z values -> Z^{-2}, Z^{-3})
// Uses Montgomery's trick on the Z values themselves
// ---------------------------------------------------------------------------
__device__ __forceinline__ void batch_jacobian_to_affine_serial(
FieldElement* __restrict__ x, // [n] Jacobian X → affine x
FieldElement* __restrict__ y, // [n] Jacobian Y → affine y
FieldElement* __restrict__ z, // [n] Jacobian Z → scratch (destroyed)
FieldElement* __restrict__ x, // [n] Jacobian X -> affine x
FieldElement* __restrict__ y, // [n] Jacobian Y -> affine y
FieldElement* __restrict__ z, // [n] Jacobian Z -> scratch (destroyed)
FieldElement* __restrict__ prefix, // [n] scratch
int n
) {

8
cuda/include/ecdh.cuh
View File

@ -1,6 +1,6 @@
#pragma once
// ============================================================================
// ECDH — Elliptic Curve Diffie-Hellman (CUDA device)
// ECDH -- Elliptic Curve Diffie-Hellman (CUDA device)
// ============================================================================
// Computes shared secret from private key + peer public key.
// Three variants:
@ -18,7 +18,7 @@
namespace secp256k1 {
namespace cuda {
// ── ECDH: compute raw x-coordinate ──────────────────────────────────────────
// -- ECDH: compute raw x-coordinate ------------------------------------------
// shared_secret = x-coordinate of sk * PK (32 bytes, big-endian)
// Returns false if result is point at infinity.
@ -41,7 +41,7 @@ __device__ inline bool ecdh_compute_raw(
return true;
}
// ── ECDH: compute x-only hash ───────────────────────────────────────────────
// -- ECDH: compute x-only hash -----------------------------------------------
// shared_secret = SHA-256(x) where x = x-coordinate of sk * PK.
__device__ inline bool ecdh_compute_xonly(
@ -60,7 +60,7 @@ __device__ inline bool ecdh_compute_xonly(
return true;
}
// ── ECDH: compute standard compressed hash ──────────────────────────────────
// -- ECDH: compute standard compressed hash ----------------------------------
// shared_secret = SHA-256(0x02 || x) standard BIP-340 / libsecp256k1 style.
__device__ inline bool ecdh_compute(

36
cuda/include/ecdsa.cuh
View File

@ -1,10 +1,10 @@
#pragma once
// ============================================================================
// ECDSA Sign / Verify for secp256k1 — CUDA device implementation
// ECDSA Sign / Verify for secp256k1 -- CUDA device implementation
// ============================================================================
// Provides GPU-side ECDSA operations:
// - ecdsa_sign(msg_hash, private_key) → ECDSASignatureGPU
// - ecdsa_verify(msg_hash, public_key, sig) → bool
// - ecdsa_sign(msg_hash, private_key) -> ECDSASignatureGPU
// - ecdsa_verify(msg_hash, public_key, sig) -> bool
// - RFC 6979 deterministic nonce (HMAC-SHA256 based)
// - Low-S normalization (BIP-62)
//
@ -18,11 +18,11 @@
namespace secp256k1 {
namespace cuda {
// ── Byte ↔ Scalar conversion (big-endian bytes ↔ LE uint64_t limbs) ─────────
// -- Byte <-> Scalar conversion (big-endian bytes <-> LE uint64_t limbs) ---------
// Convert 32 big-endian bytes to a Scalar (reduced mod n).
__device__ inline void scalar_from_bytes(const uint8_t bytes[32], Scalar* r) {
// BE bytes → LE uint64_t limbs
// BE bytes -> LE uint64_t limbs
for (int i = 0; i < 4; i++) {
uint64_t limb = 0;
int base = (3 - i) * 8;
@ -40,9 +40,9 @@ __device__ inline void scalar_from_bytes(const uint8_t bytes[32], Scalar* r) {
borrow = (uint64_t)(-(int64_t)(diff >> 64)); // 1 if borrow, 0 otherwise
}
// mask = all-ones if r >= n (no borrow), all-zeros otherwise
uint64_t mask = ~borrow + 1; // borrow==0 → ~0+1=0 → wrong
// Actually: borrow=0 means no underflow → r >= n → use tmp
// borrow=1 means underflow → r < n → keep r
uint64_t mask = ~borrow + 1; // borrow==0 -> ~0+1=0 -> wrong
// Actually: borrow=0 means no underflow -> r >= n -> use tmp
// borrow=1 means underflow -> r < n -> keep r
mask = -(uint64_t)(borrow == 0);
for (int i = 0; i < 4; i++) {
r->limbs[i] = (tmp[i] & mask) | (r->limbs[i] & ~mask);
@ -76,7 +76,7 @@ __device__ inline void field_to_bytes(const FieldElement* fe, uint8_t bytes[32])
tmp[i] = (uint64_t)diff;
borrow = (uint64_t)(-(int64_t)(diff >> 64)); // 1 if borrow, 0 otherwise
}
// If borrow==0: fe >= p → use tmp (reduced). If borrow==1: fe < p → use fe.
// If borrow==0: fe >= p -> use tmp (reduced). If borrow==1: fe < p -> use fe.
uint64_t mask = -(uint64_t)(borrow == 0); // all-1s if no borrow, all-0s if borrow
uint64_t norm[4];
for (int i = 0; i < 4; i++)
@ -90,7 +90,7 @@ __device__ inline void field_to_bytes(const FieldElement* fe, uint8_t bytes[32])
}
}
// ── SHA-256 Streaming Context ────────────────────────────────────────────────
// -- SHA-256 Streaming Context ------------------------------------------------
__device__ __constant__ static const uint32_t SHA256_K[64] = {
0x428a2f98U, 0x71374491U, 0xb5c0fbcfU, 0xe9b5dba5U,
@ -223,7 +223,7 @@ __device__ inline void sha256_final(SHA256Ctx* ctx, uint8_t out[32]) {
}
}
// ── HMAC-SHA256 ──────────────────────────────────────────────────────────────
// -- HMAC-SHA256 --------------------------------------------------------------
__device__ inline void hmac_sha256(
const uint8_t* key, size_t key_len,
@ -261,8 +261,8 @@ __device__ inline void hmac_sha256(
sha256_final(&outer, out);
}
// ── RFC 6979 Deterministic Nonce ─────────────────────────────────────────────
// Generates deterministic k for ECDSA signing per RFC 6979 §3.2
// -- RFC 6979 Deterministic Nonce ---------------------------------------------
// Generates deterministic k for ECDSA signing per RFC 6979 S3.2
// using HMAC-SHA256. Inputs: private key scalar + 32-byte message hash.
__device__ inline void rfc6979_nonce(
@ -323,7 +323,7 @@ __device__ inline void rfc6979_nonce(
for (int i = 0; i < 4; i++) k_out->limbs[i] = 0;
}
// ── ECDSA Types ──────────────────────────────────────────────────────────────
// -- ECDSA Types --------------------------------------------------------------
struct ECDSASignatureGPU {
Scalar r;
@ -342,10 +342,10 @@ __device__ __forceinline__ bool scalar_is_low_s(const Scalar* s) {
if (s->limbs[i] < HALF_ORDER.limbs[i]) return true;
if (s->limbs[i] > HALF_ORDER.limbs[i]) return false;
}
return true; // equal → low-S
return true; // equal -> low-S
}
// ── ECDSA Sign ───────────────────────────────────────────────────────────────
// -- ECDSA Sign ---------------------------------------------------------------
// Signs a 32-byte message hash with a private key.
// Uses RFC 6979 deterministic nonce.
// Returns low-S normalized signature.
@ -436,7 +436,7 @@ __device__ inline bool ecdsa_sign(
return true;
}
// ── ECDSA Verify ─────────────────────────────────────────────────────────────
// -- ECDSA Verify -------------------------------------------------------------
// Verifies an ECDSA signature against a public key and message hash.
// Accepts both low-S and high-S signatures.
// public_key must be a valid Jacobian point (not infinity).
@ -465,7 +465,7 @@ __device__ inline bool ecdsa_verify(
Scalar u2;
scalar_mul_mod_n(&sig->r, &w, &u2);
// R' = u1 * G + u2 * Q (Shamir's trick with GLV: ~128 doublings instead of 2×256)
// R' = u1 * G + u2 * Q (Shamir's trick with GLV: ~128 doublings instead of 2x256)
JacobianPoint R_prime;
shamir_double_mul_glv(&GENERATOR_JACOBIAN, &u1, public_key, &u2, &R_prime);

10
cuda/include/gpu_occupancy.cuh
View File

@ -1,6 +1,6 @@
#pragma once
// ============================================================================
// gpu_occupancy.cuh — CUDA Occupancy Auto-Tuning Utilities
// gpu_occupancy.cuh -- CUDA Occupancy Auto-Tuning Utilities
// ============================================================================
// Provides optimal launch configuration helpers that use the CUDA occupancy
// API to maximize SM utilization. Eliminates manual block-size guessing.
@ -20,7 +20,7 @@
namespace secp256k1 {
namespace cuda {
// ── Optimal 1D launch configuration ──────────────────────────────────────
// -- Optimal 1D launch configuration --------------------------------------
/// Compute optimal (grid, block) for a 1D kernel launch.
/// Uses cudaOccupancyMaxPotentialBlockSize to find the block size that
@ -53,7 +53,7 @@ __host__ inline std::pair<dim3, dim3> optimal_launch_1d(
return {dim3(grid_size), dim3(block_size)};
}
// ── Query achievable occupancy ───────────────────────────────────────────
// -- Query achievable occupancy -------------------------------------------
/// Query how many blocks of a given kernel can run concurrently per SM.
/// Useful for diagnostic/observability prints at startup.
@ -78,7 +78,7 @@ __host__ inline int query_occupancy(
return active_blocks;
}
// ── Startup diagnostics ──────────────────────────────────────────────────
// -- Startup diagnostics --------------------------------------------------
/// Print GPU device info and kernel occupancy for a set of key kernels.
/// Call once at application startup for observability.
@ -111,7 +111,7 @@ __host__ inline void print_device_info(int device_id = 0) {
#endif
}
// ── Warp-level reduction primitives ──────────────────────────────────────
// -- Warp-level reduction primitives --------------------------------------
/// Warp-wide sum reduction using shuffle-down.
/// All lanes in the warp participate; result is valid in lane 0.

24
cuda/include/msm.cuh
View File

@ -1,13 +1,13 @@
#pragma once
// ============================================================================
// Multi-Scalar Multiplication (MSM) — CUDA device implementation
// Multi-Scalar Multiplication (MSM) -- CUDA device implementation
// ============================================================================
// Device-callable MSM using Pippenger bucket method:
// R = s₁·P₁ + s₂·P₂ + ... + sₙ·Pₙ
// R = s_1*P_1 + s_2*P_2 + ... + s_n*P_n
//
// Two variants:
// 1. msm_naive: O(256n) — simple sequential scalar_mul + add
// 2. msm_pippenger: O(n/c + 2^c) per window — bucket method
// 1. msm_naive: O(256n) -- simple sequential scalar_mul + add
// 2. msm_pippenger: O(n/c + 2^c) per window -- bucket method
//
// For GPU-parallel MSM across many threads, use the batch kernel.
//
@ -21,7 +21,7 @@
namespace secp256k1 {
namespace cuda {
// ── Naive MSM (small n) ──────────────────────────────────────────────────────
// -- Naive MSM (small n) ------------------------------------------------------
// Simple sum of individual scalar multiplications.
// Best for n <= ~4.
@ -50,7 +50,7 @@ __device__ inline void msm_naive(
}
}
// ── Scalar digit extraction ─────────────────────────────────────────────────
// -- Scalar digit extraction -------------------------------------------------
// Extract c-bit window from scalar at position `window_idx` (from LSB).
__device__ inline unsigned scalar_get_window(
@ -76,7 +76,7 @@ __device__ inline unsigned scalar_get_window(
return val;
}
// ── Pippenger MSM ────────────────────────────────────────────────────────────
// -- Pippenger MSM ------------------------------------------------------------
// Bucket method: optimal for n > ~8.
//
// Parameters:
@ -138,7 +138,7 @@ __device__ inline void msm_pippenger_with_buckets(
}
}
// Aggregate buckets: Σ = Σ_{b=1}^{num_buckets-1} b · bucket[b]
// Aggregate buckets: sum = sum_{b=1}^{num_buckets-1} b * bucket[b]
// Efficient bottom-up: running_sum accumulates, partial_sum sums running
JacobianPoint running_sum, partial_sum;
running_sum.infinity = true;
@ -184,8 +184,8 @@ __device__ inline void msm_pippenger_with_buckets(
}
}
// ── Optimal window width ─────────────────────────────────────────────────────
// Returns best c for n points. Minimizes total ops ≈ ceil(256/c)*(n + 2^c).
// -- Optimal window width -----------------------------------------------------
// Returns best c for n points. Minimizes total ops ~= ceil(256/c)*(n + 2^c).
__device__ inline int msm_optimal_window(int n) {
if (n <= 1) return 1;
@ -198,7 +198,7 @@ __device__ inline int msm_optimal_window(int n) {
return 8;
}
// ── Convenience MSM with stack-allocated buckets ─────────────────────────────
// -- Convenience MSM with stack-allocated buckets -----------------------------
// For small n, uses stack buckets with c=4 (16 buckets = ~2KB).
// For larger n, caller should provide external bucket storage.
@ -225,7 +225,7 @@ __device__ inline void msm_small(
msm_pippenger_with_buckets(scalars, points, n, result, buckets, 4);
}
// ── Batch MSM kernel ─────────────────────────────────────────────────────────
// -- Batch MSM kernel ---------------------------------------------------------
// Each thread computes one scalar*point pair; results are then summed.
// This kernel just does the embarrassingly parallel part.

24
cuda/include/recovery.cuh
View File

@ -1,6 +1,6 @@
#pragma once
// ============================================================================
// ECDSA Key Recovery — CUDA device implementation
// ECDSA Key Recovery -- CUDA device implementation
// ============================================================================
// - ecdsa_sign_recoverable: ECDSA sign with recovery ID (recid 0-3)
// - ecdsa_recover: recover public key from signature + recid
@ -19,14 +19,14 @@
namespace secp256k1 {
namespace cuda {
// ── Recoverable Signature ────────────────────────────────────────────────────
// -- Recoverable Signature ----------------------------------------------------
struct RecoverableSignatureGPU {
ECDSASignatureGPU sig;
int recid; // 0-3
};
// ── Lift x-coordinate to curve point ─────────────────────────────────────────
// -- Lift x-coordinate to curve point -----------------------------------------
// Given x as FieldElement, compute point with y parity matching `parity`.
// Returns false if x is not on the curve.
@ -35,7 +35,7 @@ __device__ inline bool lift_x_field(
int parity,
JacobianPoint* p)
{
// y² = x³ + 7
// y^2 = x^3 + 7
FieldElement x2, x3, y2, seven, y;
field_sqr(x_fe, &x2);
field_mul(&x2, x_fe, &x3);
@ -45,10 +45,10 @@ __device__ inline bool lift_x_field(
field_add(&x3, &seven, &y2);
// y = sqrt(y²) = y2^((p+1)/4)
// y = sqrt(y^2) = y2^((p+1)/4)
field_sqrt(&y2, &y);
// Verify: y² == y2 (compare via normalized bytes to handle unreduced limbs)
// Verify: y^2 == y2 (compare via normalized bytes to handle unreduced limbs)
FieldElement y_check;
field_sqr(&y, &y_check);
uint8_t y_check_bytes[32], y2_bytes_cmp[32];
@ -77,7 +77,7 @@ __device__ inline bool lift_x_field(
return true;
}
// ── ECDSA Sign with Recovery ID ──────────────────────────────────────────────
// -- ECDSA Sign with Recovery ID ----------------------------------------------
__device__ inline bool ecdsa_sign_recoverable(
const uint8_t msg_hash[32],
@ -138,7 +138,7 @@ __device__ inline bool ecdsa_sign_recoverable(
}
if (overflow) recid |= 2;
// s = k⁻¹ * (z + r*d) mod n
// s = k^-^1 * (z + r*d) mod n
Scalar k_inv;
scalar_inverse(&k, &k_inv);
@ -184,8 +184,8 @@ __device__ inline bool ecdsa_sign_recoverable(
return true;
}
// ── ECDSA Public Key Recovery ────────────────────────────────────────────────
// Q = r⁻¹ * (s*R - z*G)
// -- ECDSA Public Key Recovery ------------------------------------------------
// Q = r^-^1 * (s*R - z*G)
__device__ inline bool ecdsa_recover(
const uint8_t msg_hash[32],
@ -212,7 +212,7 @@ __device__ inline bool ecdsa_recover(
}
if (recid & 2) {
// Add n to rx_fe (field addition — n as field element)
// Add n to rx_fe (field addition -- n as field element)
FieldElement n_fe;
n_fe.limbs[0] = ORDER[0];
n_fe.limbs[1] = ORDER[1];
@ -227,7 +227,7 @@ __device__ inline bool ecdsa_recover(
JacobianPoint R;
if (!lift_x_field(&rx_fe, y_parity, &R)) return false;
// Step 3: Recover public key Q = r⁻¹ * (s*R - z*G)
// Step 3: Recover public key Q = r^-^1 * (s*R - z*G)
Scalar z;
scalar_from_bytes(msg_hash, &z);

20
cuda/include/schnorr.cuh
View File

@ -1,6 +1,6 @@
#pragma once
// ============================================================================
// Schnorr Signatures (BIP-340) — CUDA device implementation
// Schnorr Signatures (BIP-340) -- CUDA device implementation
// ============================================================================
// - Tagged hash: H_tag(msg) = SHA256(SHA256(tag) || SHA256(tag) || msg)
// - Schnorr sign (BIP-340): X-only pubkeys, deterministic nonce
@ -17,7 +17,7 @@
namespace secp256k1 {
namespace cuda {
// ── Tagged Hash (BIP-340) ────────────────────────────────────────────────────
// -- Tagged Hash (BIP-340) ----------------------------------------------------
// H_tag(msg) = SHA256(SHA256(tag) || SHA256(tag) || msg)
__device__ inline void tagged_hash(
@ -41,7 +41,7 @@ __device__ inline void tagged_hash(
sha256_final(&ctx, out);
}
// ── Precomputed Tagged Hash Midstates (BIP-340) ─────────────────────────────
// -- Precomputed Tagged Hash Midstates (BIP-340) -----------------------------
// SHA256 state after processing SHA256(tag)||SHA256(tag) (one 64-byte block).
// Saves 2 SHA-256 block compressions per tagged_hash call (6 total per sign/verify).
// Each midstate: h[8] = SHA256 state, total = 64 bytes processed, buf_len = 0.
@ -87,7 +87,7 @@ __device__ inline size_t dev_strlen(const char* s) {
return n;
}
// ── Lift X (BIP-340): recover Y from X-only pubkey ──────────────────────────
// -- Lift X (BIP-340): recover Y from X-only pubkey --------------------------
// Given 32-byte x coordinate, compute the point with even Y.
// Returns false if x is not on the curve.
@ -104,7 +104,7 @@ __device__ inline bool lift_x(
x.limbs[i] = limb;
}
// y² = x³ + 7
// y^2 = x^3 + 7
FieldElement x2, x3, y2, seven, y;
field_sqr(&x, &x2);
field_mul(&x2, &x, &x3);
@ -115,10 +115,10 @@ __device__ inline bool lift_x(
field_add(&x3, &seven, &y2);
// y = sqrt(y²) = y2^((p+1)/4)
// y = sqrt(y^2) = y2^((p+1)/4)
field_sqrt(&y2, &y);
// Verify: y² == y2 (compare via normalized bytes to handle unreduced limbs)
// Verify: y^2 == y2 (compare via normalized bytes to handle unreduced limbs)
FieldElement y_check;
field_sqr(&y, &y_check);
uint8_t y_check_bytes[32], y2_bytes[32];
@ -147,14 +147,14 @@ __device__ inline bool lift_x(
return true;
}
// ── Schnorr Signature Struct ─────────────────────────────────────────────────
// -- Schnorr Signature Struct -------------------------------------------------
struct SchnorrSignatureGPU {
uint8_t r[32]; // R.x (x-coordinate of nonce point)
Scalar s; // scalar s
};
// ── BIP-340 Schnorr Sign ─────────────────────────────────────────────────────
// -- BIP-340 Schnorr Sign -----------------------------------------------------
// Signs a 32-byte message with a private key using BIP-340.
// aux_rand: 32 bytes of auxiliary randomness (can be zeros for deterministic).
// Returns false on failure.
@ -281,7 +281,7 @@ __device__ inline bool schnorr_sign(
return true;
}
// ── BIP-340 Schnorr Verify ───────────────────────────────────────────────────
// -- BIP-340 Schnorr Verify ---------------------------------------------------
// Verifies a BIP-340 Schnorr signature.
__device__ inline bool schnorr_verify(

152
cuda/include/secp256k1.cuh
View File

@ -18,7 +18,7 @@ namespace cuda {
#define SECP256K1_CUDA_USE_HYBRID_MUL 1
#endif
// Force hybrid off for HIP/ROCm — 32-bit Comba uses PTX inline asm
// Force hybrid off for HIP/ROCm -- 32-bit Comba uses PTX inline asm
#if !SECP256K1_USE_PTX
#undef SECP256K1_CUDA_USE_HYBRID_MUL
#define SECP256K1_CUDA_USE_HYBRID_MUL 0
@ -367,7 +367,7 @@ __device__ __forceinline__ void mont_reduce_512(const uint64_t t_in[8], FieldEle
}
}
#else
// Portable mont_reduce_512 — __int128 fallback for HIP/ROCm
// Portable mont_reduce_512 -- __int128 fallback for HIP/ROCm
__device__ __forceinline__ void mont_reduce_512(const uint64_t t_in[8], FieldElement* r) {
uint64_t t0 = t_in[0], t1 = t_in[1], t2 = t_in[2], t3 = t_in[3];
uint64_t t4 = t_in[4], t5 = t_in[5], t6 = t_in[6], t7 = t_in[7];
@ -1045,8 +1045,8 @@ __device__ inline void field_mul_small(const FieldElement* a, uint32_t small, Fi
// Now we have a 320-bit number: tmp[0..3] + carry * 2^256
// Reduce carry * 2^256 mod P
// Since P = 2^256 - 0x1000003d1, we have 2^256 ≡ 0x1000003d1 (mod P)
// So carry * 2^256 ≡ carry * 0x1000003d1
// Since P = 2^256 - 0x1000003d1, we have 2^256 == 0x1000003d1 (mod P)
// So carry * 2^256 == carry * 0x1000003d1
uint64_t c = (uint64_t)carry;
if (c > 0) {
@ -1090,11 +1090,11 @@ __device__ __forceinline__ void sqr_256_512(const FieldElement* a, uint64_t r[8]
sqr_256_512_ptx(a->limbs, r);
}
// 512→256 reduction: T mod P where P = 2^256 - K_MOD
// 512->256 reduction: T mod P where P = 2^256 - K_MOD
#if SECP256K1_USE_PTX
__device__ __forceinline__ void reduce_512_to_256(uint64_t t[8], FieldElement* r) {
// P = 2^256 - K_MOD, where K_MOD = 2^32 + 977 = 0x1000003D1
// T = T_hi * 2^256 + T_lo ≡ T_hi * K_MOD + T_lo (mod P)
// T = T_hi * 2^256 + T_lo == T_hi * K_MOD + T_lo (mod P)
//
// OPTIMIZATION: Multiply T_hi by K_MOD directly in one MAD chain,
// instead of splitting into T_hi*977 + T_hi<<32 (two separate passes).
@ -1104,7 +1104,7 @@ __device__ __forceinline__ void reduce_512_to_256(uint64_t t[8], FieldElement* r
uint64_t t4 = t[4], t5 = t[5], t6 = t[6], t7 = t[7];
// 1. Compute A = T_hi * K_MOD (5 limbs: a0..a4)
// Single MAD chain — replaces separate *977 + <<32 two-pass approach
// Single MAD chain -- replaces separate *977 + <<32 two-pass approach
uint64_t a0, a1, a2, a3, a4;
asm volatile(
@ -1136,8 +1136,8 @@ __device__ __forceinline__ void reduce_512_to_256(uint64_t t[8], FieldElement* r
: "l"(a0), "l"(a1), "l"(a2), "l"(a3)
);
// 3. Reduce overflow: extra = a4 + carry (≤ 2^33 + 1)
// extra * K_MOD fits in 2 limbs (≤ 2^66)
// 3. Reduce overflow: extra = a4 + carry (<= 2^33 + 1)
// extra * K_MOD fits in 2 limbs (<= 2^66)
uint64_t extra = a4 + carry;
uint64_t ek_lo, ek_hi;
asm volatile(
@ -1158,7 +1158,7 @@ __device__ __forceinline__ void reduce_512_to_256(uint64_t t[8], FieldElement* r
: "l"(ek_lo), "l"(ek_hi)
);
// 4. Rare carry overflow (probability ≈ 2^{-190})
// 4. Rare carry overflow (probability ~= 2^{-190})
if (c) {
asm volatile(
"add.cc.u64 %0, %0, %4; \n\t"
@ -1190,7 +1190,7 @@ __device__ __forceinline__ void reduce_512_to_256(uint64_t t[8], FieldElement* r
}
}
#else
// Portable reduce_512_to_256 for HIP/ROCm — uses __int128 instead of PTX
// Portable reduce_512_to_256 for HIP/ROCm -- uses __int128 instead of PTX
__device__ __forceinline__ void reduce_512_to_256(uint64_t t[8], FieldElement* r) {
uint64_t t0 = t[0], t1 = t[1], t2 = t[2], t3 = t[3];
uint64_t t4 = t[4], t5 = t[5], t6 = t[6], t7 = t[7];
@ -1425,13 +1425,13 @@ __device__ inline void jacobian_add_mixed(const JacobianPoint* p, const AffinePo
FieldElement z1z1, u2, s2, h, hh, i, j, rr, v;
FieldElement X3, Y3, Z3, t1, t2;
// Z1² [1S]
// Z1^2 [1S]
field_sqr(&p->z, &z1z1);
// U2 = X2*Z1² [1M]
// U2 = X2*Z1^2 [1M]
field_mul(&q->x, &z1z1, &u2);
// S2 = Y2*Z1³ [2M, 3M]
// S2 = Y2*Z1^3 [2M, 3M]
field_mul(&p->z, &z1z1, &t1);
field_mul(&q->y, &t1, &s2);
@ -1450,7 +1450,7 @@ __device__ inline void jacobian_add_mixed(const JacobianPoint* p, const AffinePo
return;
}
// HH = H² [2S]
// HH = H^2 [2S]
field_sqr(&h, &hh);
// I = 4*HH
@ -1467,7 +1467,7 @@ __device__ inline void jacobian_add_mixed(const JacobianPoint* p, const AffinePo
// V = X1*I [5M]
field_mul(&p->x, &i, &v);
// X3 = rr² - J - 2*V [3S]
// X3 = rr^2 - J - 2*V [3S]
field_sqr(&rr, &X3);
field_sub(&X3, &j, &X3);
field_add(&v, &v, &t1);
@ -1480,7 +1480,7 @@ __device__ inline void jacobian_add_mixed(const JacobianPoint* p, const AffinePo
field_add(&t2, &t2, &t2);
field_sub(&Y3, &t2, &Y3);
// Z3 = (Z1+H)² - Z1² - HH [4S]
// Z3 = (Z1+H)^2 - Z1^2 - HH [4S]
field_add(&p->z, &h, &t1);
field_sqr(&t1, &Z3);
field_sub(&Z3, &z1z1, &Z3);
@ -1504,17 +1504,17 @@ __device__ inline void jacobian_add_mixed_h(const JacobianPoint* p, const Affine
return;
}
// Z1² [1S]
// Z1^2 [1S]
FieldElement z1z1;
field_sqr(&p->z, &z1z1);
// U2 = X2*Z1² [1M]
// U2 = X2*Z1^2 [1M]
FieldElement u2;
field_mul(&q->x, &z1z1, &u2);
// S2 = Y2*Z1³ [2M]
// S2 = Y2*Z1^3 [2M]
FieldElement s2, temp;
field_mul(&p->z, &z1z1, &temp); // Z1³
field_mul(&p->z, &z1z1, &temp); // Z1^3
field_mul(&q->y, &temp, &s2);
// Check if same point
@ -1538,11 +1538,11 @@ __device__ inline void jacobian_add_mixed_h(const JacobianPoint* p, const Affine
h_out = h; // Return H directly (Z_{n+1} = Z_n * H)
// HH = H² [1S]
// HH = H^2 [1S]
FieldElement hh;
field_sqr(&h, &hh);
// HHH = H³ [1M]
// HHH = H^3 [1M]
FieldElement hhh;
field_mul(&h, &hh, &hhh);
@ -1550,18 +1550,18 @@ __device__ inline void jacobian_add_mixed_h(const JacobianPoint* p, const Affine
FieldElement rr;
field_sub(&s2, &p->y, &rr);
// V = X1 * H² [1M]
// V = X1 * H^2 [1M]
FieldElement v;
field_mul(&p->x, &hh, &v);
// X3 = r² - H³ - 2*V [1S]
// X3 = r^2 - H^3 - 2*V [1S]
FieldElement X3, Y3, Z3, t1;
field_add(&v, &v, &t1);
field_sqr(&rr, &X3);
field_sub(&X3, &hhh, &X3);
field_sub(&X3, &t1, &X3);
// Y3 = r*(V - X3) - Y1*H³ [2M]
// Y3 = r*(V - X3) - Y1*H^3 [2M]
field_mul(&p->y, &hhh, &t1);
field_sub(&v, &X3, &v); // reuse v
field_mul(&rr, &v, &Y3);
@ -1589,7 +1589,7 @@ __device__ inline void jacobian_add_mixed_h2(const JacobianPoint* p, const Affin
return;
}
// Z1Z1 = Z1² [1S]
// Z1Z1 = Z1^2 [1S]
FieldElement z1z1;
field_sqr(&p->z, &z1z1);
@ -1621,7 +1621,7 @@ __device__ inline void jacobian_add_mixed_h2(const JacobianPoint* p, const Affin
FieldElement h;
field_sub(&u2, &p->x, &h);
// HH = H² [1S]
// HH = H^2 [1S]
FieldElement hh;
field_sqr(&h, &hh);
@ -1643,7 +1643,7 @@ __device__ inline void jacobian_add_mixed_h2(const JacobianPoint* p, const Affin
FieldElement v;
field_mul(&p->x, &i_val, &v);
// X3 = r²-J-2*V [1S]
// X3 = r^2-J-2*V [1S]
FieldElement X3, Y3, Z3;
field_add(&v, &v, &temp);
field_sqr(&rr, &X3);
@ -1658,13 +1658,13 @@ __device__ inline void jacobian_add_mixed_h2(const JacobianPoint* p, const Affin
field_mul(&rr, &temp, &Y3);
field_sub(&Y3, &y1j, &Y3);
// Z3 = (Z1+H)²-Z1Z1-HH = 2*Z1*H [1S instead of 1M!]
// Z3 = (Z1+H)^2-Z1Z1-HH = 2*Z1*H [1S instead of 1M!]
field_add(&p->z, &h, &temp);
field_sqr(&temp, &Z3);
field_sub(&Z3, &z1z1, &Z3);
field_sub(&Z3, &hh, &Z3);
// Return 2*H for serial inversion: Z_n = Z_0 * ∏(2*H_i) = Z_0 * 2^N * ∏H_i
// Return 2*H for serial inversion: Z_n = Z_0 * prod(2*H_i) = Z_0 * 2^N * prodH_i
field_add(&h, &h, &h_out);
// Write output once
@ -1679,7 +1679,7 @@ __device__ inline void jacobian_add_mixed_h2(const JacobianPoint* p, const Affin
// Assumes: p->z == 1 (caller must ensure this)
__device__ inline void jacobian_add_mixed_h_z1(const JacobianPoint* p, const AffinePoint* q, JacobianPoint* r, FieldElement& h_out) {
// When Z1 = 1:
// Z1² = 1, Z1³ = 1
// Z1^2 = 1, Z1^3 = 1
// U2 = X2 * 1 = X2 (0 mul saved!)
// S2 = Y2 * 1 = Y2 (2 mul saved!)
@ -1705,11 +1705,11 @@ __device__ inline void jacobian_add_mixed_h_z1(const JacobianPoint* p, const Aff
h_out = h; // Return H directly
// HH = H² [1S]
// HH = H^2 [1S]
FieldElement hh;
field_sqr(&h, &hh);
// HHH = H³ [1M]
// HHH = H^3 [1M]
FieldElement hhh;
field_mul(&h, &hh, &hhh);
@ -1717,18 +1717,18 @@ __device__ inline void jacobian_add_mixed_h_z1(const JacobianPoint* p, const Aff
FieldElement rr;
field_sub(&q->y, &p->y, &rr);
// V = X1 * H² [1M]
// V = X1 * H^2 [1M]
FieldElement v;
field_mul(&p->x, &hh, &v);
// X3 = r² - H³ - 2*V [1S]
// X3 = r^2 - H^3 - 2*V [1S]
FieldElement X3, Y3, t1;
field_add(&v, &v, &t1);
field_sqr(&rr, &X3);
field_sub(&X3, &hhh, &X3);
field_sub(&X3, &t1, &X3);
// Y3 = r*(V - X3) - Y1*H³ [2M]
// Y3 = r*(V - X3) - Y1*H^3 [2M]
field_mul(&p->y, &hhh, &t1);
field_sub(&v, &X3, &v); // reuse v
field_mul(&rr, &v, &Y3);
@ -1754,17 +1754,17 @@ __device__ inline void jacobian_add_mixed_const(
JacobianPoint* r,
FieldElement& h_out
) {
// Z1² [1S]
// Z1^2 [1S]
FieldElement z1z1;
field_sqr(&p->z, &z1z1);
// U2 = X2*Z1² [1M]
// U2 = X2*Z1^2 [1M]
FieldElement u2;
field_mul(&qx, &z1z1, &u2);
// S2 = Y2*Z1³ [2M]
// S2 = Y2*Z1^3 [2M]
FieldElement s2, z1_cubed;
field_mul(&p->z, &z1z1, &z1_cubed); // Z1³
field_mul(&p->z, &z1z1, &z1_cubed); // Z1^3
field_mul(&qy, &z1_cubed, &s2);
// H = U2 - X1
@ -1773,11 +1773,11 @@ __device__ inline void jacobian_add_mixed_const(
h_out = h;
// HH = H² [1S]
// HH = H^2 [1S]
FieldElement hh;
field_sqr(&h, &hh);
// HHH = H³ [1M]
// HHH = H^3 [1M]
FieldElement hhh;
field_mul(&h, &hh, &hhh);
@ -1785,18 +1785,18 @@ __device__ inline void jacobian_add_mixed_const(
FieldElement rr;
field_sub(&s2, &p->y, &rr);
// V = X1 * H² [1M]
// V = X1 * H^2 [1M]
FieldElement v;
field_mul(&p->x, &hh, &v);
// X3 = r² - H³ - 2*V [1S]
// X3 = r^2 - H^3 - 2*V [1S]
FieldElement X3, Y3, Z3, t1;
field_add(&v, &v, &t1);
field_sqr(&rr, &X3);
field_sub(&X3, &hhh, &X3);
field_sub(&X3, &t1, &X3);
// Y3 = r*(V - X3) - Y1*H³ [2M]
// Y3 = r*(V - X3) - Y1*H^3 [2M]
field_mul(&p->y, &hhh, &t1);
field_sub(&v, &X3, &v); // reuse v
field_mul(&rr, &v, &Y3);
@ -1822,7 +1822,7 @@ __device__ inline void jacobian_add_mixed_const_7m4s(
JacobianPoint* r,
FieldElement& h_out
) {
// Z1Z1 = Z1² [1S]
// Z1Z1 = Z1^2 [1S]
FieldElement z1z1;
field_sqr(&p->z, &z1z1);
@ -1839,7 +1839,7 @@ __device__ inline void jacobian_add_mixed_const_7m4s(
FieldElement h;
field_sub(&u2, &p->x, &h);
// HH = H² [1S]
// HH = H^2 [1S]
FieldElement hh;
field_sqr(&h, &hh);
@ -1861,7 +1861,7 @@ __device__ inline void jacobian_add_mixed_const_7m4s(
FieldElement v;
field_mul(&p->x, &i_val, &v);
// X3 = r²-J-2*V [1S]
// X3 = r^2-J-2*V [1S]
FieldElement X3, Y3, Z3;
field_add(&v, &v, &temp);
field_sqr(&rr, &X3);
@ -1876,7 +1876,7 @@ __device__ inline void jacobian_add_mixed_const_7m4s(
field_mul(&rr, &temp, &Y3);
field_sub(&Y3, &y1j, &Y3);
// Z3 = (Z1+H)²-Z1Z1-HH = 2*Z1*H [1S instead of 1M! KEY OPTIMIZATION]
// Z3 = (Z1+H)^2-Z1Z1-HH = 2*Z1*H [1S instead of 1M! KEY OPTIMIZATION]
field_add(&p->z, &h, &temp);
field_sqr(&temp, &Z3);
field_sub(&Z3, &z1z1, &Z3);
@ -1904,23 +1904,23 @@ __device__ inline void point_add_mixed(const FieldElement* p_x, const FieldEleme
if (same_y) {
// Point doubling in affine, convert to Jacobian
// λ = (3*x²) / (2*y)
// lambda = (3*x^2) / (2*y)
FieldElement lambda, temp, x_sq;
field_sqr(p_x, &x_sq);
field_add(&x_sq, &x_sq, &temp); // 2*x²
field_add(&temp, &x_sq, &temp); // 3*x²
field_add(&x_sq, &x_sq, &temp); // 2*x^2
field_add(&temp, &x_sq, &temp); // 3*x^2
FieldElement two_y;
field_add(p_y, p_y, &two_y); // 2*y
field_inv(&two_y, &two_y); // 1/(2*y)
field_mul(&temp, &two_y, &lambda); // λ
field_mul(&temp, &two_y, &lambda); // lambda
// x' = λ² - 2*x
// x' = lambda^2 - 2*x
field_sqr(&lambda, r_x);
field_sub(r_x, p_x, r_x);
field_sub(r_x, p_x, r_x);
// y' = λ*(x - x') - y
// y' = lambda*(x - x') - y
field_sub(p_x, r_x, &temp);
field_mul(&lambda, &temp, r_y);
field_sub(r_y, p_y, r_y);
@ -1931,19 +1931,19 @@ __device__ inline void point_add_mixed(const FieldElement* p_x, const FieldEleme
}
}
// Different points: λ = (y2 - y1) / (x2 - x1)
// Different points: lambda = (y2 - y1) / (x2 - x1)
FieldElement lambda, dx, dy;
field_sub(q_y, p_y, &dy); // y2 - y1
field_sub(q_x, p_x, &dx); // x2 - x1
field_inv(&dx, &dx); // 1/(x2 - x1)
field_mul(&dy, &dx, &lambda); // λ
field_mul(&dy, &dx, &lambda); // lambda
// x' = λ² - x1 - x2
// x' = lambda^2 - x1 - x2
field_sqr(&lambda, r_x);
field_sub(r_x, p_x, r_x);
field_sub(r_x, q_x, r_x);
// y' = λ*(x1 - x') - y1
// y' = lambda*(x1 - x') - y1
FieldElement temp;
field_sub(p_x, r_x, &temp);
field_mul(&lambda, &temp, r_y);
@ -2004,7 +2004,7 @@ __device__ inline void point_scalar_mul_simple(uint64_t k,
field_mul(&acc.y, &z_inv_cube, result_y);
}
// Apply GLV endomorphism: φ(x,y) = (β·x, y)
// Apply GLV endomorphism: phi(x,y) = (beta*x, y)
__device__ inline void apply_endomorphism(const JacobianPoint* p, JacobianPoint* r) {
if (p->infinity) {
*r = *p;
@ -2406,10 +2406,10 @@ __device__ inline void field_inv(const FieldElement* a, FieldElement* r) {
field_inv_fermat_chain_impl(a, r);
}
// ── Field Square Root ────────────────────────────────────────────────────────
// Computes r = sqrt(a) = a^((p+1)/4) for secp256k1 where p ≡ 3 (mod 4).
// -- Field Square Root --------------------------------------------------------
// Computes r = sqrt(a) = a^((p+1)/4) for secp256k1 where p == 3 (mod 4).
// (p+1)/4 = 0x3FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFBFFFFF0C
// Returns a valid sqrt if a is a quadratic residue; caller must verify r²==a.
// Returns a valid sqrt if a is a quadratic residue; caller must verify r^2==a.
// Optimized addition chain: 255 squarings + 14 multiplications = 269 ops.
__device__ inline void field_sqrt(const FieldElement* a, FieldElement* r) {
FieldElement x2, x3, x6, x22, x44, t;
@ -2460,7 +2460,7 @@ __device__ inline void field_sqrt(const FieldElement* a, FieldElement* r) {
field_sqr_n(&t, 2);
field_mul(&t, &x2, &t);
// Tail: extend 1^222 → 1^223 0 1^22 0000 11 00
// Tail: extend 1^222 -> 1^223 0 1^22 0000 11 00
// x223: t = t^2 * a
field_sqr(&t, &t);
field_mul(&t, a, &t);
@ -2502,7 +2502,7 @@ __global__ void scalar_mul_batch_kernel(const JacobianPoint* points, const Scala
__global__ void generator_mul_batch_kernel(const Scalar* scalars, JacobianPoint* results, int count);
// Windowed generator multiplication kernel (w=4, shared-memory precomputed table)
// ~30-40% faster than plain double-and-add: 252 doublings + ≤64 adds vs 256 + ~128.
// ~30-40% faster than plain double-and-add: 252 doublings + <=64 adds vs 256 + ~128.
__global__ void generator_mul_windowed_batch_kernel(const Scalar* scalars, JacobianPoint* results, int count);
// Generator constant (inline definition for proper linkage across translation units)
@ -2529,7 +2529,7 @@ __device__ __constant__ static const JacobianPoint GENERATOR_JACOBIAN = {
false
};
// ── Precomputed Generator Table Builder ──────────────────────────────────────
// -- Precomputed Generator Table Builder --------------------------------------
// Builds table[i] = i*G for i=0..15 using Jacobian coordinates.
// Called by a single thread (threadIdx.x == 0).
// Caller MUST issue __syncthreads() after this returns.
@ -2556,10 +2556,10 @@ __device__ inline void build_generator_table(JacobianPoint* table) {
}
}
// ── Fixed-Window (w=4) Generator Scalar Multiplication ──────────────────────
// -- Fixed-Window (w=4) Generator Scalar Multiplication ----------------------
// Uses precomputed table[0..15] = i*G from build_generator_table.
// Processes scalar 4 bits at a time (MSB to LSB): 64 windows.
// Cost: 252 doublings + ≤64 jacobian_adds.
// Cost: 252 doublings + <=64 jacobian_adds.
// Compared to plain double-and-add: saves ~50% of point additions.
__device__ inline void scalar_mul_generator_windowed(
const JacobianPoint* table, const Scalar* k, JacobianPoint* r)
@ -2600,7 +2600,7 @@ __device__ inline void scalar_mul_generator_windowed(
}
// ============================================================================
// Optimized Scalar Multiplication — wNAF w=4
// Optimized Scalar Multiplication -- wNAF w=4
// ============================================================================
// Windowed Non-Adjacent Form with pre-negated affine table.
// 8 precomputed odd multiples: [P, 3P, 5P, 7P, 9P, 11P, 13P, 15P]
@ -2752,7 +2752,7 @@ __device__ inline void scalar_mul_wnaf(const JacobianPoint* p, const Scalar* k,
}
int8_t d = wnaf[i];
if (d > 0) {
int idx = (d - 1) / 2; // d=1→0, d=3→1, ..., d=15→7
int idx = (d - 1) / 2; // d=1->0, d=3->1, ..., d=15->7
if (r->infinity) {
r->x = tbl[idx].x;
r->y = tbl[idx].y;
@ -2838,7 +2838,7 @@ __device__ inline void scalar_mul_glv_wnaf(const JacobianPoint* p, const Scalar*
j1.x = p1.x; j1.y = p1.y; field_set_one(&j1.z); j1.infinity = false;
jacobian_add_mixed(&j1, &p2, &jp);
if (jp.infinity) {
p1_plus_p2.x = p1.x; // degenerate — won't happen in practice
p1_plus_p2.x = p1.x; // degenerate -- won't happen in practice
p1_plus_p2.y = p1.y;
} else {
FieldElement zi, zi2, zi3;
@ -3075,7 +3075,7 @@ __device__ inline void shamir_double_mul_glv(
field_mul(&Q->y, &zi3, &aff_Q.y);
}
// Build 4 base points: P, endo(P), Q, endo(Q) — with sign adjustments
// Build 4 base points: P, endo(P), Q, endo(Q) -- with sign adjustments
AffinePoint pts[4]; // pts[0]=P1, pts[1]=P2(endo), pts[2]=Q1, pts[3]=Q2(endo)
FieldElement zero_fe;
field_set_zero(&zero_fe);
@ -3161,7 +3161,7 @@ __device__ inline void shamir_double_mul_glv(
// These are the standard secp256k1 generator multiples.
__device__ __constant__ static const AffinePoint GENERATOR_TABLE_AFFINE[16] = {
// [0] = O (identity, unused — handled by branch)
// [0] = O (identity, unused -- handled by branch)
{{{0, 0, 0, 0}}, {{0, 0, 0, 0}}},
// [1] = G
{{{0x59F2815B16F81798ULL, 0x029BFCDB2DCE28D9ULL, 0x55A06295CE870B07ULL, 0x79BE667EF9DCBBACULL}},
@ -3210,9 +3210,9 @@ __device__ __constant__ static const AffinePoint GENERATOR_TABLE_AFFINE[16] = {
{{0xC504DC9FF6A26B58ULL, 0xEA40AF2BD896D3A5ULL, 0x83842EC228CC6DEFULL, 0x581E2872A86C72A6ULL}}},
};
// ── Optimized Generator Scalar Multiplication with constant table ────────────
// -- Optimized Generator Scalar Multiplication with constant table ------------
// Uses GENERATOR_TABLE_AFFINE in __constant__ memory (no build_generator_table needed).
// Fixed-window w=4: 252 doublings + ≤64 mixed additions.
// Fixed-window w=4: 252 doublings + <=64 mixed additions.
// Saves shared-memory allocation and __syncthreads() compared to runtime table.
__device__ inline void scalar_mul_generator_const(const Scalar* k, JacobianPoint* r) {
r->infinity = true;

4
cuda/include/secp256k1_32.cuh
View File

@ -374,9 +374,9 @@ __device__ __forceinline__ void mont_reduce_512(uint32_t* r) {
}
__device__ __forceinline__ void field_reduce_std(uint32_t* wide, FieldElement* r) {
// Reduction formula: 2^256 ≡ 2^32 + 977 (mod P)
// Reduction formula: 2^256 == 2^32 + 977 (mod P)
// For high limb h at position 8+i:
// h * 2^(256+32i) ≡ h * (2^32 + 977) * 2^(32i)
// h * 2^(256+32i) == h * (2^32 + 977) * 2^(32i)
// = h*977 at position i + h at position i+1
// Multi-pass reduction: Keep reducing until high limbs are zero

18
cuda/include/secp256k1_32_hybrid_final.cuh
View File

@ -6,11 +6,11 @@
// ============================================================================
// 32-bit multiplication using proven Comba's method
// Input: 64-bit FieldElement (4×64) viewed as 32-bit (8×32)
// Input: 64-bit FieldElement (4x64) viewed as 32-bit (8x32)
// Output: 512-bit result for reduce_512_to_256
// ============================================================================
// Core 32-bit Comba multiplication → raw uint32_t[16] output (no packing)
// Core 32-bit Comba multiplication -> raw uint32_t[16] output (no packing)
// Separated from wrapper to allow direct use with 32-bit reduction
__device__ __forceinline__ void mul_256_comba32(
const secp256k1::cuda::FieldElement* a,
@ -122,7 +122,7 @@ __device__ __forceinline__ void mul_256_512_hybrid(
// ~40% fewer multiplications than generic multiplication
// ============================================================================
// Core 32-bit Comba squaring → raw uint32_t[16] output
// Core 32-bit Comba squaring -> raw uint32_t[16] output
__device__ __forceinline__ void sqr_256_comba32(
const secp256k1::cuda::FieldElement* a,
uint32_t t32[16]
@ -270,10 +270,10 @@ __device__ __forceinline__ void sqr_256_512_hybrid(
// ============================================================================
// 32-bit secp256k1 reduction (consumer GPU optimized)
// On consumer NVIDIA GPUs (Turing/Ampere/Ada/Blackwell), INT64 multiply
// throughput is 1/32 of INT32. By doing the main T_hi × K_MOD multiplication
// throughput is 1/32 of INT32. By doing the main T_hi x K_MOD multiplication
// in 32-bit, we avoid the INT64 multiply bottleneck.
// Phase 1+2: fully 32-bit (T_hi × K_MOD + add to T_lo)
// Phase 3+4: 64-bit (overflow handling + conditional subtraction — proven code)
// Phase 1+2: fully 32-bit (T_hi x K_MOD + add to T_lo)
// Phase 3+4: 64-bit (overflow handling + conditional subtraction -- proven code)
// ============================================================================
__device__ __forceinline__ void reduce_512_to_256_32(
uint32_t t32[16],
@ -284,7 +284,7 @@ __device__ __forceinline__ void reduce_512_to_256_32(
const uint32_t t8 = t32[8], t9 = t32[9], t10 = t32[10], t11 = t32[11];
const uint32_t t12 = t32[12], t13 = t32[13], t14 = t32[14], t15 = t32[15];
// ---- Phase 1: A = T_hi × 977 (32-bit scalar MAD chain → 9 limbs) ----
// ---- Phase 1: A = T_hi x 977 (32-bit scalar MAD chain -> 9 limbs) ----
uint32_t a0, a1, a2, a3, a4, a5, a6, a7, a8;
asm volatile(
"mul.lo.u32 %0, %9, 977;\n\t"
@ -309,7 +309,7 @@ __device__ __forceinline__ void reduce_512_to_256_32(
"r"(t12), "r"(t13), "r"(t14), "r"(t15)
);
// ---- Phase 1b: Add T_hi << 32 (shift by 1 limb = ×2^32 component of K_MOD) ----
// ---- Phase 1b: Add T_hi << 32 (shift by 1 limb = x2^32 component of K_MOD) ----
uint32_t a9;
asm volatile(
"add.cc.u32 %0, %0, %9;\n\t"
@ -406,7 +406,7 @@ __device__ __forceinline__ void reduce_512_to_256_32(
// ============================================================================
// Hybrid field operations: 32-bit mul/sqr + 32-bit reduce (optimized)
// Consumer GPUs have INT32 multiply throughput 32× higher than INT64.
// Consumer GPUs have INT32 multiply throughput 32x higher than INT64.
// By keeping the main reduction in 32-bit, we avoid the INT64 bottleneck.
// ============================================================================

22
cuda/src/bench_cuda.cu
View File

@ -136,10 +136,10 @@ void generate_random_affine_points(FieldElement* h_x, FieldElement* h_y, int cou
}
// ============================================================================
// Affine benchmark wrapper kernels (__device__ → __global__)
// Affine benchmark wrapper kernels (__device__ -> __global__)
// ============================================================================
// Full affine add (includes per-element inversion — 2M + 1S + inv)
// Full affine add (includes per-element inversion -- 2M + 1S + inv)
__global__ void bench_affine_add_kernel(
const FieldElement* __restrict__ px, const FieldElement* __restrict__ py,
const FieldElement* __restrict__ qx, const FieldElement* __restrict__ qy,
@ -153,7 +153,7 @@ __global__ void bench_affine_add_kernel(
}
}
// Affine add with pre-inverted H — full X,Y output (2M + 1S)
// Affine add with pre-inverted H -- full X,Y output (2M + 1S)
__global__ void bench_affine_add_lambda_kernel(
const FieldElement* __restrict__ px, const FieldElement* __restrict__ py,
const FieldElement* __restrict__ qx, const FieldElement* __restrict__ qy,
@ -196,7 +196,7 @@ __global__ void bench_affine_compute_h_kernel(
}
}
// Batch inversion kernel — one thread processes a serial batch of CHAIN_LEN elements
// Batch inversion kernel -- one thread processes a serial batch of CHAIN_LEN elements
static constexpr int BATCH_INV_CHAIN_LEN = 64;
__global__ void bench_batch_inv_kernel(
@ -212,7 +212,7 @@ __global__ void bench_batch_inv_kernel(
}
}
// Jacobian → Affine conversion kernel
// Jacobian -> Affine conversion kernel
__global__ void bench_jac_to_affine_kernel(
FieldElement* __restrict__ x,
FieldElement* __restrict__ y,
@ -803,11 +803,11 @@ BenchResult bench_jacobian_to_affine(const BenchConfig& cfg) {
CUDA_CHECK(cudaFree(d_y));
CUDA_CHECK(cudaFree(d_z));
return {"Jac→Affine (per-pt)", avg_ms, batch, throughput, ns_per_op};
return {"Jac->Affine (per-pt)", avg_ms, batch, throughput, ns_per_op};
}
// ============================================================================
// Signature benchmarks (ECDSA + Schnorr) — 64-bit limb mode only
// Signature benchmarks (ECDSA + Schnorr) -- 64-bit limb mode only
// ============================================================================
// Forward-declare batch kernels (defined in secp256k1.cu, namespace secp256k1::cuda)
@ -1133,11 +1133,11 @@ BenchResult bench_schnorr_verify(const BenchConfig& cfg) {
// and extract x-only manually. For benchmark purposes this prep time doesn't matter.
};
// Simple host-side x extraction (only for test data prep — not benchmarked)
// Simple host-side x extraction (only for test data prep -- not benchmarked)
// This is a rough approximation: the actual Jacobian->affine involves field_inv
// which we can't call from host. So let's use a different approach:
// Sign a known message with privkey, the sign function internally computes P.
// The schnorr_verify takes pubkey_x as bytes — we need the x-only pubkey.
// The schnorr_verify takes pubkey_x as bytes -- we need the x-only pubkey.
// Let's compute it by running scalar_mul on GPU and converting to affine.
// Actually, let's just allocate and generate x-only pubkeys on GPU with a custom approach.
@ -1328,7 +1328,7 @@ void print_result(const BenchResult& r) {
<< r.time_per_op_ns / 1000000 << " ms";
} else if (r.time_per_op_ns >= 1000) {
std::cout << std::right << std::setw(8) << std::fixed << std::setprecision(2)
<< r.time_per_op_ns / 1000 << " μs";
<< r.time_per_op_ns / 1000 << " us";
} else {
std::cout << std::right << std::setw(8) << std::fixed << std::setprecision(1)
<< r.time_per_op_ns << " ns";
@ -1359,7 +1359,7 @@ void print_summary_table(const std::vector<BenchResult>& results) {
<< r.time_per_op_ns / 1000000 << " ms";
} else if (r.time_per_op_ns >= 1000) {
std::cout << std::right << std::setw(8) << std::fixed << std::setprecision(2)
<< r.time_per_op_ns / 1000 << " μs";
<< r.time_per_op_ns / 1000 << " us";
} else {
std::cout << std::right << std::setw(8) << std::fixed << std::setprecision(1)
<< r.time_per_op_ns << " ns";

20
cuda/src/secp256k1.cu
View File

@ -6,7 +6,7 @@
namespace secp256k1 {
namespace cuda {
// Field operation kernels — lightweight, high-occupancy targets.
// Field operation kernels -- lightweight, high-occupancy targets.
// 256 threads/block, min 4 blocks/SM for register pressure balance.
__global__ __launch_bounds__(256, 4)
@ -41,7 +41,7 @@ void field_inv_kernel(const FieldElement* a, FieldElement* r, int count) {
}
}
// Scalar multiplication kernels — register-heavy, lower occupancy acceptable.
// Scalar multiplication kernels -- register-heavy, lower occupancy acceptable.
// 128 threads/block, min 2 blocks/SM to balance register pressure vs. latency hiding.
__global__ __launch_bounds__(128, 2)
@ -113,10 +113,10 @@ void hash160_pubkey_kernel(const uint8_t* pubkeys, int pubkey_len, uint8_t* out_
// ============================================================================
#if !SECP256K1_CUDA_LIMBS_32
// ECDSA Sign batch — each thread signs one message
// ECDSA Sign batch -- each thread signs one message
__global__ __launch_bounds__(128, 2)
void ecdsa_sign_batch_kernel(
const uint8_t* __restrict__ msg_hashes, // count × 32 bytes
const uint8_t* __restrict__ msg_hashes, // count x 32 bytes
const Scalar* __restrict__ private_keys,
ECDSASignatureGPU* __restrict__ sigs,
bool* __restrict__ results,
@ -129,7 +129,7 @@ void ecdsa_sign_batch_kernel(
}
}
// ECDSA Verify batch — each thread verifies one signature
// ECDSA Verify batch -- each thread verifies one signature
__global__ __launch_bounds__(128, 2)
void ecdsa_verify_batch_kernel(
const uint8_t* __restrict__ msg_hashes,
@ -145,12 +145,12 @@ void ecdsa_verify_batch_kernel(
}
}
// Schnorr Sign batch — each thread signs one message
// Schnorr Sign batch -- each thread signs one message
__global__ __launch_bounds__(128, 2)
void schnorr_sign_batch_kernel(
const Scalar* __restrict__ private_keys,
const uint8_t* __restrict__ msgs, // count × 32 bytes
const uint8_t* __restrict__ aux_rands, // count × 32 bytes
const uint8_t* __restrict__ msgs, // count x 32 bytes
const uint8_t* __restrict__ aux_rands, // count x 32 bytes
SchnorrSignatureGPU* __restrict__ sigs,
bool* __restrict__ results,
int count)
@ -163,10 +163,10 @@ void schnorr_sign_batch_kernel(
}
}
// Schnorr Verify batch — each thread verifies one signature
// Schnorr Verify batch -- each thread verifies one signature
__global__ __launch_bounds__(128, 2)
void schnorr_verify_batch_kernel(
const uint8_t* __restrict__ pubkeys_x, // count × 32 bytes (x-only)
const uint8_t* __restrict__ pubkeys_x, // count x 32 bytes (x-only)
const uint8_t* __restrict__ msgs,
const SchnorrSignatureGPU* __restrict__ sigs,
bool* __restrict__ results,

12
cuda/src/test_suite.cu
View File

@ -1038,7 +1038,7 @@ static bool test_squared_scalars(bool verbose) {
}
static bool test_bilinearity_K_times_Q(bool verbose) {
if (verbose) std::cout << "\nBilinearity: K*(Q±G) vs K*Q ± K*G\n";
if (verbose) std::cout << "\nBilinearity: K*(Q+-G) vs K*Q +- K*G\n";
bool ok = true;
const char* KHEX[] = {
"0000000000000000000000000000000000000000000000000000000000000005",
@ -1908,7 +1908,7 @@ static bool test_generator_mul_windowed_op(bool verbose) {
return ok;
}
// ── ECDSA Sign + Verify Test ─────────────────────────────────────────────────
// -- ECDSA Sign + Verify Test -------------------------------------------------
__global__ void kernel_ecdsa_sign_verify(
const uint8_t* msg_hash, const Scalar* priv_key,
@ -2045,7 +2045,7 @@ static bool test_ecdsa_sign_verify_op(bool verbose) {
cudaFree(d_sign_ok); cudaFree(d_verify_ok);
}
// Test 4: low-S normalization — verify signature r,s are both non-zero and s is low
// Test 4: low-S normalization -- verify signature r,s are both non-zero and s is low
{
HostScalar priv = HostScalar::from_uint64(7);
Scalar h_priv = priv.to_device();
@ -2147,7 +2147,7 @@ __global__ void kernel_schnorr_verify_bad_msg(
uint8_t pk_bytes[32];
field_to_bytes(&px, pk_bytes);
// Verify with wrong message — should fail
// Verify with wrong message -- should fail
uint8_t bad_msg[32];
for (int i = 0; i < 32; i++) bad_msg[i] = d_msg[i] ^ 0xFF;
*d_result = !schnorr_verify(pk_bytes, bad_msg, &sig); // expect rejection
@ -2294,7 +2294,7 @@ static bool test_ecdh_op(bool verbose) {
if (verbose) std::cout << "\nECDH Shared Secret:\n";
bool ok = true;
// Test 1: ECDH x-only — both parties compute same shared secret
// Test 1: ECDH x-only -- both parties compute same shared secret
{
Scalar privA = {}, privB = {};
privA.limbs[0] = 42;
@ -2335,7 +2335,7 @@ static bool test_ecdh_op(bool verbose) {
cudaFree(d_okA); cudaFree(d_okB);
}
// Test 2: ECDH raw — same property
// Test 2: ECDH raw -- same property
{
Scalar privA = {}, privB = {};
privA.limbs[0] = 0xCAFEBABEULL;

26
docs/ABI_VERSIONING.md
View File

@ -22,7 +22,7 @@ CMake reads it at configure time and propagates it to headers, `pkg-config`, and
## 2. Bump Rules
### MAJOR (e.g. 3 → 4)
### MAJOR (e.g. 3 -> 4)
A **MAJOR** bump indicates an ABI-incompatible change. Consumers **must** recompile.
Triggers:
@ -34,10 +34,10 @@ Triggers:
Actions on MAJOR bump:
- Increment `UFSECP_ABI_VERSION` in `ufsecp_version.h.in`
- Increment `SOVERSION` in CMake (`PROJECT_VERSION_MAJOR` tracks this automatically)
- Document the breaking changes in `CHANGELOG.md` under **⚠ Breaking**
- Document the breaking changes in `CHANGELOG.md` under **[!] Breaking**
- Add a migration note in `CHANGELOG.md`
### MINOR (e.g. 3.14 → 3.15)
### MINOR (e.g. 3.14 -> 3.15)
A **MINOR** bump adds functionality in a backwards-compatible manner. Existing consumers
continue to work **without** recompilation if they only use previously existing symbols.
@ -51,12 +51,12 @@ Actions on MINOR bump:
- Do **not** change `SOVERSION`
- Document new API in `CHANGELOG.md` under **Added**
### PATCH (e.g. 3.14.0 → 3.14.1)
### PATCH (e.g. 3.14.0 -> 3.14.1)
A **PATCH** bump is a backwards-compatible bug fix. No API surface changes.
Triggers:
- Correctness fix in existing functions
- Performance improvements (same inputs → same outputs)
- Performance improvements (same inputs -> same outputs)
- Documentation / CI fixes
Actions on PATCH bump:
@ -113,9 +113,9 @@ if (ufsecp_version() < 0x030E00) {
## 4. Shared Library Naming (ELF / Linux)
```
libfastsecp256k1.so → symlink to current
libfastsecp256k1.so.3 → SOVERSION (= MAJOR)
libfastsecp256k1.so.3.14.0 → full version
libfastsecp256k1.so -> symlink to current
libfastsecp256k1.so.3 -> SOVERSION (= MAJOR)
libfastsecp256k1.so.3.14.0 -> full version
```
CMake sets this via:
@ -137,9 +137,9 @@ ABI version: `fastsecp256k1-3.dll`. Import library: `fastsecp256k1.lib`.
### macOS
```
libfastsecp256k1.dylib → symlink
libfastsecp256k1.3.dylib → compatibility version
libfastsecp256k1.3.14.0.dylib → current version
libfastsecp256k1.dylib -> symlink
libfastsecp256k1.3.dylib -> compatibility version
libfastsecp256k1.3.14.0.dylib -> current version
```
---
@ -209,8 +209,8 @@ Cflags: -I${includedir}
Consumers should use:
```bash
pkg-config --modversion ufsecp # → 3.14.0
pkg-config --libs ufsecp # → -L/usr/local/lib -lfastsecp256k1
pkg-config --modversion ufsecp # -> 3.14.0
pkg-config --libs ufsecp # -> -L/usr/local/lib -lfastsecp256k1
```
---

54
docs/API_REFERENCE.md
View File

@ -86,8 +86,8 @@ FieldElement inv = a.inverse();
a += b;
a -= b;
a *= b;
a.square_inplace(); // a = a²
a.inverse_inplace(); // a = a⁻¹
a.square_inplace(); // a = a^2
a.inverse_inplace(); // a = a^-¹
```
#### Serialization
@ -230,7 +230,7 @@ Point neg = p.negate(); // -p
#### Optimized Scalar Multiplication
```cpp
// For fixed K × variable Q pattern (same K, different Q points):
// For fixed K x variable Q pattern (same K, different Q points):
Scalar K = Scalar::from_hex("...");
KPlan plan = KPlan::from_scalar(K); // Precompute once
@ -561,7 +561,7 @@ void point_dbl(const Point& p, Point& out);
} // namespace secp256k1::fast::ct
```
> ⚠️ CT operations are ~5-7× slower than the fast variants. Use only for private key operations (signing, ECDH).
> [!] CT operations are ~5-7x slower than the fast variants. Use only for private key operations (signing, ECDH).
---
@ -579,12 +579,12 @@ void point_dbl(const Point& p, Point& out);
### CUDA Data Structures
```cpp
// Field element (4 × 64-bit limbs, little-endian)
// Field element (4 x 64-bit limbs, little-endian)
struct FieldElement {
uint64_t limbs[4];
};
// Scalar (4 × 64-bit limbs)
// Scalar (4 x 64-bit limbs)
struct Scalar {
uint64_t limbs[4];
};
@ -772,7 +772,7 @@ Host-callable kernel wrappers for batch processing:
```cpp
// Launch batch ECDSA sign (128 threads/block, 2 blocks/SM)
void ecdsa_sign_batch_kernel<<<blocks, 128>>>(
const uint8_t* msg_hashes, // N × 32 bytes
const uint8_t* msg_hashes, // N x 32 bytes
const Scalar* privkeys, // N scalars
ECDSASignatureGPU* sigs, // N output signatures
int count
@ -834,15 +834,15 @@ const lib = await Secp256k1.create();
| Function | Parameters | Returns | Description |
|----------|-----------|---------|-------------|
| `selftest()` | — | `boolean` | Run built-in self-test |
| `version()` | — | `string` | Library version (`"3.0.0"`) |
| `selftest()` | -- | `boolean` | Run built-in self-test |
| `version()` | -- | `string` | Library version (`"3.0.0"`) |
| `pubkeyCreate(seckey)` | `Uint8Array(32)` | `{x, y}` | Public key from private key |
| `pointMul(px, py, scalar)` | `Uint8Array(32)` × 3 | `{x, y}` | Scalar × Point |
| `pointAdd(px, py, qx, qy)` | `Uint8Array(32)` × 4 | `{x, y}` | Point addition |
| `ecdsaSign(msgHash, seckey)` | `Uint8Array(32)` × 2 | `Uint8Array(64)` | ECDSA sign (r‖s) |
| `ecdsaVerify(msgHash, pubX, pubY, sig)` | `Uint8Array(32)` × 3 + `Uint8Array(64)` | `boolean` | ECDSA verify |
| `schnorrSign(seckey, msg, aux?)` | `Uint8Array(32)` × 2-3 | `Uint8Array(64)` | Schnorr BIP-340 sign |
| `schnorrVerify(pubkeyX, msg, sig)` | `Uint8Array(32)` × 2 + `Uint8Array(64)` | `boolean` | Schnorr verify |
| `pointMul(px, py, scalar)` | `Uint8Array(32)` x 3 | `{x, y}` | Scalar x Point |
| `pointAdd(px, py, qx, qy)` | `Uint8Array(32)` x 4 | `{x, y}` | Point addition |
| `ecdsaSign(msgHash, seckey)` | `Uint8Array(32)` x 2 | `Uint8Array(64)` | ECDSA sign (r‖s) |
| `ecdsaVerify(msgHash, pubX, pubY, sig)` | `Uint8Array(32)` x 3 + `Uint8Array(64)` | `boolean` | ECDSA verify |
| `schnorrSign(seckey, msg, aux?)` | `Uint8Array(32)` x 2-3 | `Uint8Array(64)` | Schnorr BIP-340 sign |
| `schnorrVerify(pubkeyX, msg, sig)` | `Uint8Array(32)` x 2 + `Uint8Array(64)` | `boolean` | Schnorr verify |
| `schnorrPubkey(seckey)` | `Uint8Array(32)` | `Uint8Array(32)` | X-only public key |
| `sha256(data)` | `Uint8Array` | `Uint8Array(32)` | SHA-256 hash |
@ -854,7 +854,7 @@ For direct C/C++ or custom WASM bindings, see [secp256k1_wasm.h](../wasm/secp256
```javascript
const lib = await Secp256k1.create();
console.log('v' + lib.version(), lib.selftest() ? '✓' : '✗');
console.log('v' + lib.version(), lib.selftest() ? 'OK' : 'X');
// ECDSA workflow
const privkey = new Uint8Array(32);
@ -925,7 +925,7 @@ int main() {
"E9873D79C6D87DC0FB6A5778633389F4453213303DA61F20BD67FC233AA33262"
);
// Public key = private_key × G
// Public key = private_key x G
Point G = Point::generator();
Point public_key = G.scalar_mul(private_key);
@ -1011,7 +1011,7 @@ int main() {
|-------|---------|-------------|
| `SECP256K1_CUDA_USE_HYBRID_MUL` | 1 | 32-bit hybrid multiplication (~10% faster) |
| `SECP256K1_CUDA_USE_MONTGOMERY` | 0 | Montgomery domain arithmetic |
| `SECP256K1_CUDA_LIMBS_32` | 0 | Use 8×32-bit limbs (experimental) |
| `SECP256K1_CUDA_LIMBS_32` | 0 | Use 8x32-bit limbs (experimental) |
---
@ -1019,15 +1019,15 @@ int main() {
| Platform | Assembly | SIMD | Status |
|----------|----------|------|--------|
| x86-64 Linux/Windows/macOS | BMI2/ADX | AVX2 | ✅ Production |
| RISC-V 64 | RV64GC | RVV 1.0 | ✅ Production |
| ARM64 (Android/iOS/macOS) | MUL/UMULH | NEON | ✅ Production |
| CUDA (sm_75+) | PTX | — | ✅ Production |
| ROCm/HIP (AMD) | Portable | — | ✅ CI |
| OpenCL 3.0 | PTX | — | ✅ Production |
| WebAssembly | Portable | — | ✅ Production |
| ESP32-S3 / ESP32 | Portable | — | ✅ Tested |
| STM32F103 (Cortex-M3) | UMULL | — | ✅ Tested |
| x86-64 Linux/Windows/macOS | BMI2/ADX | AVX2 | [OK] Production |
| RISC-V 64 | RV64GC | RVV 1.0 | [OK] Production |
| ARM64 (Android/iOS/macOS) | MUL/UMULH | NEON | [OK] Production |
| CUDA (sm_75+) | PTX | -- | [OK] Production |
| ROCm/HIP (AMD) | Portable | -- | [OK] CI |
| OpenCL 3.0 | PTX | -- | [OK] Production |
| WebAssembly | Portable | -- | [OK] Production |
| ESP32-S3 / ESP32 | Portable | -- | [OK] Tested |
| STM32F103 (Cortex-M3) | UMULL | -- | [OK] Tested |
---

302
docs/ARCHITECTURE.md
View File

@ -1,41 +1,41 @@
# Architecture
**UltrafastSecp256k1 v3.12.1** — Technical Architecture for Auditors
**UltrafastSecp256k1 v3.12.1** -- Technical Architecture for Auditors
---
## System Diagram
```
┌─────────────────────────────────────────────────────────────────┐
│ Application Layer │
│ (Wallet, Signer, Verifier, Key Manager, Address Generator) │
├─────────────────────────────────────────────────────────────────┤
│ Protocol Layer │
│ ECDSA (RFC 6979) │ Schnorr (BIP-340) │ MuSig2 │ FROST │
│ Adaptor Sigs │ Pedersen Commit │ Taproot│ HD (BIP-32) │
├─────────────────────────────────────────────────────────────────┤
│ Dispatch / Utility Layer │
│ 27-Coin Dispatch │ SHA-256 │ RIPEMD-160 │ Batch Inverse │
├─────────────────────────────────────────────────────────────────┤
│ Core Arithmetic Layer │
│ ┌──────────────────────┬──────────────────────┐ │
│ │ FAST (variable-time)│ CT (constant-time) │ │
│ │ secp256k1::fast:: │ secp256k1::ct:: │ │
│ │ ┌────────────────┐ │ ┌────────────────┐ │ │
│ │ │ FieldElement │ │ │ ct::FieldOps │ │ │
│ │ │ Scalar │ │ │ ct::ScalarOps │ │ │
│ │ │ Point (Jac/Aff)│ │ │ ct::Point │ │ │
│ │ │ GLV Endo. │ │ │ ct::scalar_mul │ │ │
│ │ │ Hamburg Comb │ │ │ ct::gen_mul │ │ │
│ │ └────────────────┘ │ └────────────────┘ │ │
│ └──────────────────────┴──────────────────────┘ │
├─────────────────────────────────────────────────────────────────┤
│ Platform Backend Layer │
│ x86-64 BMI2/ADX │ ARM64 MUL/UMULH │ RISC-V RV64GC │
│ CUDA PTX │ ROCm/HIP │ OpenCL │
│ Metal │ WASM │ Xtensa (ESP32) │
└─────────────────────────────────────────────────────────────────┘
+-----------------------------------------------------------------+
| Application Layer |
| (Wallet, Signer, Verifier, Key Manager, Address Generator) |
+-----------------------------------------------------------------+
| Protocol Layer |
| ECDSA (RFC 6979) | Schnorr (BIP-340) | MuSig2 | FROST |
| Adaptor Sigs | Pedersen Commit | Taproot| HD (BIP-32) |
+-----------------------------------------------------------------+
| Dispatch / Utility Layer |
| 27-Coin Dispatch | SHA-256 | RIPEMD-160 | Batch Inverse |
+-----------------------------------------------------------------+
| Core Arithmetic Layer |
| +----------------------+----------------------+ |
| | FAST (variable-time)| CT (constant-time) | |
| | secp256k1::fast:: | secp256k1::ct:: | |
| | +----------------+ | +----------------+ | |
| | | FieldElement | | | ct::FieldOps | | |
| | | Scalar | | | ct::ScalarOps | | |
| | | Point (Jac/Aff)| | | ct::Point | | |
| | | GLV Endo. | | | ct::scalar_mul | | |
| | | Hamburg Comb | | | ct::gen_mul | | |
| | +----------------+ | +----------------+ | |
| +----------------------+----------------------+ |
+-----------------------------------------------------------------+
| Platform Backend Layer |
| x86-64 BMI2/ADX | ARM64 MUL/UMULH | RISC-V RV64GC |
| CUDA PTX | ROCm/HIP | OpenCL |
| Metal | WASM | Xtensa (ESP32) |
+-----------------------------------------------------------------+
```
---
@ -45,19 +45,19 @@
The fundamental data type. All higher-level operations build on field arithmetic.
```
FieldElement: 4 × uint64_t limbs (little-endian)
FieldElement: 4 x uint64_t limbs (little-endian)
limbs[0] limbs[1] limbs[2] limbs[3]
┌────────┬────────┬────────┬────────┐
│ [0:63] │[64:127]│[128:191]│[192:255]│ = 256 bits total
└────────┴────────┴────────┴────────┘
+--------+--------+--------+--------+
| [0:63] |[64:127]|[128:191]|[192:255]| = 256 bits total
+--------+--------+--------+--------+
LSB MSB
Prime p = 2^256 - 2^32 - 977
= 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFC2F
Reduction: After arithmetic, normalize() ensures 0 ≤ result < p
by checking if limbs ≥ PRIME and subtracting if needed.
Reduction: After arithmetic, normalize() ensures 0 <= result < p
by checking if limbs >= PRIME and subtracting if needed.
```
### Key Files
@ -66,7 +66,7 @@ Reduction: After arithmetic, normalize() ensures 0 ≤ result < p
|------|---------|
| `cpu/include/secp256k1/field.hpp` | Class declaration, `from_limbs`, `from_bytes` |
| `cpu/src/field.cpp` | `add_impl`, `sub_impl`, `mul_impl`, `square_impl`, `normalize` |
| `cpu/include/secp256k1/field_branchless.hpp` | `field_select` — branchless cmov |
| `cpu/include/secp256k1/field_branchless.hpp` | `field_select` -- branchless cmov |
### MidFieldElement (32-bit View)
@ -77,7 +77,7 @@ struct MidFieldElement {
// sizeof(MidFieldElement) == sizeof(FieldElement) == 32 bytes
```
Zero-cost reinterpretation for operations where 32-bit multiplication is faster (~1.10× on some µarch). Memory layout is identical.
Zero-cost reinterpretation for operations where 32-bit multiplication is faster (~1.10x on some uarch). Memory layout is identical.
### Endianness Convention
@ -94,11 +94,11 @@ Zero-cost reinterpretation for operations where 32-bit multiplication is faster
## Scalar Representation
```
Scalar: 4 × uint64_t limbs (little-endian)
Scalar: 4 x uint64_t limbs (little-endian)
Order n = 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141
Represented as 4×64-bit limbs. All operations reduce mod n.
Represented as 4x64-bit limbs. All operations reduce mod n.
Scalar::zero(), Scalar::one(), inverse via SafeGCD or Fermat exponentiation.
```
@ -109,22 +109,22 @@ Scalar::zero(), Scalar::one(), inverse via SafeGCD or Fermat exponentiation.
### Jacobian Coordinates (default for computation)
```
(X, Y, Z) where affine (x, y) = (X/Z², Y/Z³)
(X, Y, Z) where affine (x, y) = (X/Z^2, Y/Z^3)
Advantages:
- Addition: no inversion needed
- Doubling: no inversion needed
- Only need inversion when converting back to affine
Memory: 3 × FieldElement = 96 bytes
Memory: 3 x FieldElement = 96 bytes
```
### Affine Coordinates (for storage/lookup)
```
(x, y) — direct curve point
(x, y) -- direct curve point
Memory: 2 × FieldElement = 64 bytes
Memory: 2 x FieldElement = 64 bytes
Used for: precomputed tables, serialization, final output
```
@ -136,13 +136,13 @@ Used for: precomputed tables, serialization, final output
```
scalar_mul(P, k):
1. GLV decompose: k → k1 + k2·λ (mod n)
where λ³ ≡ 1 (mod n), β³ ≡ 1 (mod p)
and P' = (β·x, y) satisfies k2·P' computation
1. GLV decompose: k -> k1 + k2*lambda (mod n)
where lambda^3 == 1 (mod n), beta^3 == 1 (mod p)
and P' = (beta*x, y) satisfies k2*P' computation
2. Both k1, k2 are ~128 bits (half the scalar width)
3. Windowed simultaneous evaluation of k1·P + k2·P'
3. Windowed simultaneous evaluation of k1*P + k2*P'
Result: ~2× speedup over naive double-and-add
Result: ~2x speedup over naive double-and-add
```
### FAST Layer: Hamburg Signed-Digit Comb (Generator)
@ -155,16 +155,16 @@ generator_mul(k):
4. Cost: 64 unified_add + 64 signed_lookups(8)
5. No doublings needed (comb structure handles it)
~3× faster than generic scalar_mul(G, k)
~3x faster than generic scalar_mul(G, k)
```
### CT Layer: GLV + Signed-Digit
```
ct::scalar_mul(P, k):
1. k → (k + K) / 2, GLV split → v1, v2 (~129 bits each)
2. 26 groups of 5 bits, each → non-zero odd digit
3. Table: 16 odd multiples per curve ([1P..31P], [1λP..31λP])
1. k -> (k + K) / 2, GLV split -> v1, v2 (~129 bits each)
2. 26 groups of 5 bits, each -> non-zero odd digit
3. Table: 16 odd multiples per curve ([1P..31P], [1lambdaP..31lambdaP])
4. Cost: 125 dbl + 52 unified_add + 52 signed_lookups(16)
5. ALL operations are constant-time (no branches on secret bits)
@ -184,12 +184,12 @@ Two primary algorithms:
```
Default on platforms with __int128:
fe_inverse_safegcd_impl(x) — 62-bit divsteps
~3× faster than binary EEA for secp256k1
fe_inverse_safegcd_impl(x) -- 62-bit divsteps
~3x faster than binary EEA for secp256k1
Fallback (no __int128):
field_safegcd30::inverse_impl(x) — 30-bit divsteps
~130µs on ESP32 vs ~3ms Fermat chain
field_safegcd30::inverse_impl(x) -- 30-bit divsteps
~130us on ESP32 vs ~3ms Fermat chain
```
### Fermat's Little Theorem (multiple strategies)
@ -211,8 +211,8 @@ Default: SafeGCD (most platforms), Addchain (ESP32)
```
fe_batch_inverse(elements[], count):
Cost: 1 inversion + 3·(count-1) multiplications
For N=8: ~8µs instead of ~28µs (3.5× speedup)
Cost: 1 inversion + 3*(count-1) multiplications
For N=8: ~8us instead of ~28us (3.5x speedup)
Sweep-tested up to 8192 elements
```
@ -223,8 +223,8 @@ fe_batch_inverse(elements[], count):
| Platform | File | Key Operations |
|----------|------|----------------|
| x86-64 | `field_asm_x64.asm` | BMI2 `MULX`, ADX `ADCX`/`ADOX` for carry-free mul |
| ARM64 | `field_asm_arm64.cpp` | `MUL`/`UMULH` intrinsics for 64×64→128 |
| RISC-V | `field_asm_riscv64.S` | `MUL`/`MULHU` for 64×64→128 |
| ARM64 | `field_asm_arm64.cpp` | `MUL`/`UMULH` intrinsics for 64x64->128 |
| RISC-V | `field_asm_riscv64.S` | `MUL`/`MULHU` for 64x64->128 |
| ESP32 | `field.cpp` (generic) | 32-bit portable path |
Assembly dispatch is compile-time: preprocessor selects the optimal path based on `__x86_64__`, `__aarch64__`, `__riscv`, or falls back to portable C++.
@ -237,41 +237,41 @@ Assembly dispatch is compile-time: preprocessor selects the optimal path based o
```
cuda/
├── include/
│ ├── secp256k1.cuh — All device functions
│ ├── ptx_math.cuh — PTX inline asm (with __int128 fallback)
│ ├── gpu_compat.h — CUDA ↔ HIP API mapping
│ ├── batch_inversion.cuh — Montgomery trick on GPU
│ ├── bloom.cuh — Device-side Bloom filter
│ └── hash160.cuh — SHA-256 + RIPEMD-160
├── app/ — Search kernels
└── src/ — Kernel wrappers, tests
+-- include/
| +-- secp256k1.cuh -- All device functions
| +-- ptx_math.cuh -- PTX inline asm (with __int128 fallback)
| +-- gpu_compat.h -- CUDA <-> HIP API mapping
| +-- batch_inversion.cuh -- Montgomery trick on GPU
| +-- bloom.cuh -- Device-side Bloom filter
| +-- hash160.cuh -- SHA-256 + RIPEMD-160
+-- app/ -- Search kernels
+-- src/ -- Kernel wrappers, tests
```
**GPU Contract**:
- No dynamic allocation in device hot loops
- No per-iteration host/device sync
- Launch parameters derived from config.json
- NOT constant-time — for public-data workloads only
- NOT constant-time -- for public-data workloads only
### OpenCL
```
opencl/kernels/
├── secp256k1_field.cl — Field arithmetic
├── secp256k1_extended.cl — GLV, signatures
└── ...
+-- secp256k1_field.cl -- Field arithmetic
+-- secp256k1_extended.cl -- GLV, signatures
+-- ...
```
### Metal
```
metal/shaders/
├── secp256k1_field.h — 8×32-bit limbs (Metal uint)
└── ...
+-- secp256k1_field.h -- 8x32-bit limbs (Metal uint)
+-- ...
```
**Note**: Metal uses 8×32-bit limbs (vs 4×64-bit on CPU) due to Metal Shading Language constraints.
**Note**: Metal uses 8x32-bit limbs (vs 4x64-bit on CPU) due to Metal Shading Language constraints.
---
@ -281,25 +281,25 @@ metal/shaders/
```
MUST:
✓ Allocation-free hot paths
✓ Explicit buffers (out*, in*, scratch*)
✓ Fixed-size POD types
✓ In-place mutation only
✓ Deterministic memory layout
✓ alignas(32/64) where applicable
OK Allocation-free hot paths
OK Explicit buffers (out*, in*, scratch*)
OK Fixed-size POD types
OK In-place mutation only
OK Deterministic memory layout
OK alignas(32/64) where applicable
NEVER:
✗ Heap allocation (new, malloc, push_back, resize)
✗ Exceptions / RTTI / virtual calls
✗ Strings / iostreams / formatting
✗ Hidden temporaries
✗ % or / (use Montgomery/Barrett)
X Heap allocation (new, malloc, push_back, resize)
X Exceptions / RTTI / virtual calls
X Strings / iostreams / formatting
X Hidden temporaries
X % or / (use Montgomery/Barrett)
```
### Scratchpad Pattern
```
Single allocation → full reuse
Single allocation -> full reuse
Thread-local scratch on CPU
Pointer-based reset (no memset in loops)
Caller owns all buffers
@ -313,17 +313,17 @@ Caller owns all buffers
```
sign(hash, privkey):
1. k = RFC6979_nonce(hash, privkey) — deterministic
2. R = k·G
1. k = RFC6979_nonce(hash, privkey) -- deterministic
2. R = k*G
3. r = R.x mod n
4. s = k^(-1) · (hash + r·privkey) mod n
4. s = k^(-1) * (hash + r*privkey) mod n
5. return (r, s)
verify(hash, pubkey, r, s):
1. w = s^(-1) mod n
2. u1 = hash · w mod n
3. u2 = r · w mod n
4. R' = u1·G + u2·pubkey
2. u1 = hash * w mod n
3. u2 = r * w mod n
4. R' = u1*G + u2*pubkey
5. return R'.x == r
```
@ -335,9 +335,9 @@ sign(hash, privkey):
2. aux = tagged_hash("BIP0340/aux", rand)
3. t = d XOR aux
4. k = tagged_hash("BIP0340/nonce", t || pubkey || hash)
5. R = k·G (ensure even y)
5. R = k*G (ensure even y)
6. e = tagged_hash("BIP0340/challenge", R.x || pubkey || hash)
7. s = k + e·d mod n
7. s = k + e*d mod n
8. return (R.x, s)
```
@ -347,7 +347,7 @@ sign(hash, privkey):
- **FROST**: Threshold signature (t-of-n)
- **Adaptor**: Signature adaptors for atomic swaps
All marked **Experimental** — APIs may change, limited test coverage.
All marked **Experimental** -- APIs may change, limited test coverage.
---
@ -355,49 +355,49 @@ All marked **Experimental** — APIs may change, limited test coverage.
```
CMakeLists.txt
├── lib: UltrafastSecp256k1 (STATIC)
│ ├── cpu/src/*.cpp
│ ├── platform-specific ASM (conditional)
│ └── Public headers in cpu/include/
├── tests/ (CTest targets)
├── bench/ (benchmark targets)
├── fuzz/ (libFuzzer targets, clang only)
├── cuda/ (optional, requires CUDA toolkit)
├── opencl/ (optional, requires OpenCL SDK)
└── wasm/ (optional, requires Emscripten)
+-- lib: UltrafastSecp256k1 (STATIC)
| +-- cpu/src/*.cpp
| +-- platform-specific ASM (conditional)
| +-- Public headers in cpu/include/
+-- tests/ (CTest targets)
+-- bench/ (benchmark targets)
+-- fuzz/ (libFuzzer targets, clang only)
+-- cuda/ (optional, requires CUDA toolkit)
+-- opencl/ (optional, requires OpenCL SDK)
+-- wasm/ (optional, requires Emscripten)
Key CMake Options:
-DCMAKE_BUILD_TYPE=Release — Optimized build
-DCMAKE_CXX_FLAGS="-fsanitize=address,undefined" — Sanitizer build
-DSECP256K1_USE_ROCKSDB=ON — Enable RocksDB-dependent tools
-DSECP256K1_SPEED_FIRST=ON — Aggressive speed optimizations
-DCMAKE_CUDA_ARCHITECTURES=86;89 — CUDA target architectures
-DCMAKE_BUILD_TYPE=Release -- Optimized build
-DCMAKE_CXX_FLAGS="-fsanitize=address,undefined" -- Sanitizer build
-DSECP256K1_USE_ROCKSDB=ON -- Enable RocksDB-dependent tools
-DSECP256K1_SPEED_FIRST=ON -- Aggressive speed optimizations
-DCMAKE_CUDA_ARCHITECTURES=86;89 -- CUDA target architectures
```
---
## Data Flow: Sign → Verify
## Data Flow: Sign -> Verify
```
┌─────────┐ ┌──────────┐ ┌──────────┐ ┌──────────┐
│ Message │───→│ SHA-256 │───→│ Sign │───→│ (r, s) │
│ (bytes) │ │ hash() │ │ ECDSA/ │ │ signature│
└─────────┘ └──────────┘ │ Schnorr │ └──────────┘
└──────────┘
│
+---------+ +----------+ +----------+ +----------+
| Message |---->| SHA-256 |---->| Sign |---->| (r, s) |
| (bytes) | | hash() | | ECDSA/ | | signature|
+---------+ +----------+ | Schnorr | +----------+
+----------+
|
▼
┌──────────┐
│ privkey │ (Scalar)
│ → k·G │ (RFC 6979 nonce)
│ → r, s │ (signature components)
└──────────┘
+----------+
| privkey | (Scalar)
| -> k*G | (RFC 6979 nonce)
| -> r, s | (signature components)
+----------+
Verification:
┌──────────┐ ┌──────────┐ ┌──────────┐ ┌──────┐
│ (r, s) │──→│ Verify │──→│ u1·G + │──→│ bool │
│ + hash │ │ decompose│ │ u2·pubkey│ │ pass │
│ + pubkey │ │ u1, u2 │ │ ?= R │ └──────┘
└──────────┘ └──────────┘ └──────────┘
+----------+ +----------+ +----------+ +------+
| (r, s) |--->| Verify |--->| u1*G + |--->| bool |
| + hash | | decompose| | u2*pubkey| | pass |
| + pubkey | | u1, u2 | | ?= R | +------+
+----------+ +----------+ +----------+
```
---
@ -405,29 +405,29 @@ Verification:
## Security Boundaries
```
┌─────────────────────────────────────────────┐
│ THIS LIBRARY CONTROLS │
│ │
│ ✓ Arithmetic correctness (F_p, Z_n, E) │
│ ✓ CT layer timing properties │
│ ✓ Deterministic nonce generation │
│ ✓ Input validation (on-curve, range) │
│ ✓ Memory layout (no hidden alloc) │
│ ✓ Platform dispatch (ASM selection) │
└─────────────────────────────────────────────┘
+---------------------------------------------+
| THIS LIBRARY CONTROLS |
| |
| OK Arithmetic correctness (F_p, Z_n, E) |
| OK CT layer timing properties |
| OK Deterministic nonce generation |
| OK Input validation (on-curve, range) |
| OK Memory layout (no hidden alloc) |
| OK Platform dispatch (ASM selection) |
+---------------------------------------------+
┌─────────────────────────────────────────────┐
│ CALLER RESPONSIBILITY │
│ │
│ ✗ Key storage and lifecycle │
│ ✗ Buffer zeroing after use │
│ ✗ FAST vs CT selection │
│ ✗ Network security / transport │
│ ✗ Entropy source (if randomness needed) │
│ ✗ GPU memory isolation │
└─────────────────────────────────────────────┘
+---------------------------------------------+
| CALLER RESPONSIBILITY |
| |
| X Key storage and lifecycle |
| X Buffer zeroing after use |
| X FAST vs CT selection |
| X Network security / transport |
| X Entropy source (if randomness needed) |
| X GPU memory isolation |
+---------------------------------------------+
```
---
*UltrafastSecp256k1 v3.12.1 — Architecture*
*UltrafastSecp256k1 v3.12.1 -- Architecture*

56
docs/AUDIT_READINESS_REPORT_v1.md
View File

@ -1,4 +1,4 @@
# Verification Transparency Report — v3.14.0
# Verification Transparency Report -- v3.14.0
**Status: NOT externally audited.**
**Verification artifacts published for independent review.**
@ -81,7 +81,7 @@ Nightly extended run: **~1.3M checks** (multiplier=100). Zero mismatches.
|----------|--------:|:----:|
| BIP-340 (Schnorr sign + verify) | 15 | 15/15 |
| RFC 6979 (ECDSA deterministic nonce) | 6 | 6/6 |
| BIP-32 (HD derivation TV1–TV5) | 90 | 90/90 |
| BIP-32 (HD derivation TV1-TV5) | 90 | 90/90 |
| FROST KAT (pinned intermediate values) | 76 | 76/76 |
### Property Tests
@ -90,24 +90,24 @@ Nightly extended run: **~1.3M checks** (multiplier=100). Zero mismatches.
|----------|-------:|
| Group associativity: (P+Q)+R == P+(Q+R) | 10,000 |
| Distributive: k(P+Q) == kP + kQ | 10,000 |
| Jacobian↔Affine round-trip | 10,000 |
| Square ≡ Mul: sqr(x) == mul(x,x) | 10,000 |
| Jacobian<->Affine round-trip | 10,000 |
| Square == Mul: sqr(x) == mul(x,x) | 10,000 |
| Inverse: x * inv(x) == 1 (field + scalar) | 20,000 |
| GLV: k1*G + k2*(λ*G) == k*G | 1,000 |
| FAST ≡ CT equivalence (all ops) | 120,652 |
| GLV: k1*G + k2*(lambda*G) == k*G | 1,000 |
| FAST == CT equivalence (all ops) | 120,652 |
### Roundtrip Serialization
| Format | Verified |
|--------|:--------:|
| DER encode → decode | ✔ |
| Compact 64-byte encode → decode | ✔ |
| Schnorr 64-byte encode → decode | ✔ |
| Compressed pubkey serialize → parse | ✔ |
| Uncompressed pubkey serialize → parse | ✔ |
| WIF encode → decode | ✔ |
| Bech32/Bech32m encode → decode | ✔ |
| BIP-32 xpub/xprv serialize → parse | ✔ |
| DER encode -> decode | OK |
| Compact 64-byte encode -> decode | OK |
| Schnorr 64-byte encode -> decode | OK |
| Compressed pubkey serialize -> parse | OK |
| Uncompressed pubkey serialize -> parse | OK |
| WIF encode -> decode | OK |
| Bech32/Bech32m encode -> decode | OK |
| BIP-32 xpub/xprv serialize -> parse | OK |
---
@ -138,7 +138,7 @@ Ideal: 1.0. Concern threshold: 1.2. Result is within acceptable bounds.
### Limitations
- Architecture tested: x86-64 (CI runner). Other µarch may differ.
- Architecture tested: x86-64 (CI runner). Other uarch may differ.
- No formal verification (ct-verif, Vale) applied.
- Compiler may introduce secret-dependent branches at optimization levels.
- GPU backends are **NOT constant-time** by design.
@ -208,14 +208,14 @@ Tracked in `tests/corpus/MANIFEST.txt`. Replayed on every CI run.
| Measure | Status |
|---------|--------|
| SLSA Provenance attestation | ✔ Every release |
| SHA-256 checksums (`SHA256SUMS.txt`) | ✔ Every release |
| Cosign keyless signature (.sig + .pem) | ✔ Every release |
| SBOM (CycloneDX 1.6) | ✔ Every release |
| Reproducible build (Dockerfile) | ✔ Available |
| Dependabot | ✔ Active |
| Dependency review | ✔ Every PR |
| Docker SHA-pinned images | ✔ CI + reproducible build |
| SLSA Provenance attestation | OK Every release |
| SHA-256 checksums (`SHA256SUMS.txt`) | OK Every release |
| Cosign keyless signature (.sig + .pem) | OK Every release |
| SBOM (CycloneDX 1.6) | OK Every release |
| Reproducible build (Dockerfile) | OK Available |
| Dependabot | OK Active |
| Dependency review | OK Every PR |
| Docker SHA-pinned images | OK CI + reproducible build |
---
@ -247,7 +247,7 @@ Every GitHub Release includes:
}
```
Produced by `selftest_report(SelftestMode::ci).to_json()` — available in C++ API
Produced by `selftest_report(SelftestMode::ci).to_json()` -- available in C++ API
and all language bindings (Python, Rust, Go, C#, Node.js, etc.).
---
@ -280,8 +280,8 @@ and all language bindings (Python, Rust, Go, C#, Node.js, etc.).
| Gap | Impact | Mitigation |
|-----|--------|-----------|
| No formal CT verification | Compiler may break CT at -O2 | dudect + code review |
| Single µarch timing test | Other CPUs may behave differently | Planned multi-µarch campaign |
| GPU↔CPU limited differential | GPU correctness partially verified | Planned full equivalence |
| Single uarch timing test | Other CPUs may behave differently | Planned multi-uarch campaign |
| GPU<->CPU limited differential | GPU correctness partially verified | Planned full equivalence |
| FROST no IETF ciphersuite | No external reference vectors for secp256k1 | Self-generated KATs |
| MuSig2/FROST experimental | API may change | Documented, version-gated |
@ -333,7 +333,7 @@ ctest --test-dir build-san --output-on-failure
|----------|---------|
| [INTERNAL_AUDIT.md](INTERNAL_AUDIT.md) | Full audit results (718 lines, per-check detail) |
| [INVARIANTS.md](INVARIANTS.md) | 108 mathematical invariants catalog |
| [TEST_MATRIX.md](TEST_MATRIX.md) | Function → test coverage map |
| [TEST_MATRIX.md](TEST_MATRIX.md) | Function -> test coverage map |
| [CT_VERIFICATION.md](CT_VERIFICATION.md) | Constant-time methodology |
| [THREAT_MODEL.md](../THREAT_MODEL.md) | Layer-by-layer risk assessment |
| [ARCHITECTURE.md](ARCHITECTURE.md) | Technical architecture |
@ -343,5 +343,5 @@ ctest --test-dir build-san --output-on-failure
---
*UltrafastSecp256k1 v3.14.0 — Verification Transparency Report*
*UltrafastSecp256k1 v3.14.0 -- Verification Transparency Report*
*Not audited. Verification artifacts published for independent review.*

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