This modifies the signatures of all the transactions in the invalid
transaction data which involve checking signatures to ensure that they
are not failing for the wrong reason.
In order to make it easier for future updates, it introduces three
well-known private keys, 1, 2, and 3, that are used for signing all of
the transactions and adds them to the comments in the test data. The
first one is used for regular CHECKSIG while all three are used for
CHECKMULTISIG.
This removes the tests related to max money checks since txscript does
not do sanity checking on the monetary amounts as that is done by the
consensus rules in blockchain.
While here, update dcrscript -> txscript in the comments to reflect
reality.
As an aside, the existing tests were invalid anyways since the
signatures were invalid and thus the tests were failing for the wrong
reason.
This removes the test for the original Bitcoin bug in CHECKMULTISIG that
required an additional argument since that has been fixed in Decred and
the test therefore no longer applies.
As an aside, the existing test was invalid anyways since the signature
was invalid and thus the test would've failed for the wrong reason.
This replaces the tests for CODESEPARATOR in the invalid transaction
JSON data to be correct for Decred. It is always invalid to pass over
the CODESEPARATOR opcode in Decred as opposed to the Bitcoin behavior
where it changes what is hashed for the signature hash calculation.
As an aside, the previous tests were invalid anyways since they included
a signature that was invalid so the test would've failed for the wrong
reason. For all of these tests it's important for them to pass other
than the specific failure condition they are intended to trigger.
This corrects the hashes for the p2sh scripts in the invalid transaction
JSON data. This helps ensure the transactions are failing for the
intended reason as opposed to the p2sh script never being run because
the script hashes don't match.
This commit contains fixes from the results of a thorough audit of
txscript to find any cases of script evaluation which doesn't match the
required consensus behavior. These conditions are fairly obscure and
highly unlikely to happen in any real scripts, but they could have
nevertheless been used by a clever attacker with malicious intent to
cause a fork.
Test cases which exercise these conditions have been added to the
reference tests and will contributed upstream to improve the quality for
the entire ecosystem.
This commit adds two new verification flags to txscript named
ScriptVerifyStrictEncoding and ScriptVerifyDerSignatures.
The ScriptVerifyStrictEncoding flag enforces signature scripts
and public keys to follow the strict encoding requirements.
The ScriptVerifyDerSignatures flag enforces signature scripts
to follow the strict encoding requirements.
These flags mimic Bitcoin Core's SCRIPT_VERIFY_STRICTENC and
SCRIPT_VERIFY_DERSIG flags and brings the Bitcoin Core test scripts up
to date.
This commit contains the entire btcscript repository along with several
changes needed to move all of the files into the txscript directory in
order to prepare it for merging. This does NOT update btcd or any of the
other packages to use the new location as that will be done separately.
- All import paths in the old btcscript test files have been changed to the
new location
- All references to btcscript as the package name have been chagned to
txscript
This is ongoing work toward #214.
