Export SeedQR

(cherry picked from commit a1f6743de2)

releases/ChangeLog.md

@@ -1,6 +1,7 @@
 ## 5.2.1 - 2023-11-XX
 
 - New Feature: Temporary Seed from COLDCARD encrypted backup.
+- New Feature: Export seed as SeedQR
 - Enhancement: Add current temporary seed to Seed Vault from within Seed Vault menu.
   If current seed is temporary and not saved yet, `Add current tmp` menu item is 
   shown in Seed Vault menu.

shared/actions.py

@@ -719,6 +719,42 @@ async def view_seed_words(*a):
     stash.blank_object(msg)
     stash.blank_object(raw)
 
+async def export_seedqr(*a):
+    # see standard: <https://github.com/SeedSigner/seedsigner/blob/dev/docs/seed_qr/README.md>
+    import bip39, stash
+
+    if not await ux_confirm('The next screen will show the seed words in a QR code.'
+                            '\n\nAnyone with knowledge of those words '
+                            'can control all funds in this wallet.'):
+        return
+
+    from glob import dis
+    dis.fullscreen("Wait...")
+    dis.busy_bar(True)
+
+    # Note: cannot reach this menu item if no words. If they are tmp, that's cool.
+
+    with stash.SensitiveValues(bypass_tmp=False) as sv:
+        if sv.deltamode:
+            # give up and wipe self rather than show true seed values.
+            import callgate
+            callgate.fast_wipe()
+
+        if sv.mode != 'words':
+            raise ValueError(sv.mode)
+
+        words = bip39.b2a_words(sv.raw).split(' ')
+
+        dis.busy_bar(False)
+        qr = ''.join('%04d'% bip39.get_word_index(w) for w in words)
+
+        del words
+
+    from ux import show_qr_code
+    await show_qr_code(qr, True)
+
+    stash.blank_object(qr)
+
 async def damage_myself():
     # called when it's time to disable ourselves due to various
     # features related to duress and so on

shared/flow.py

@@ -212,6 +212,8 @@ SeedFunctionsMenu = [
     MenuItem('Seed XOR', menu=SeedXORMenu),
     MenuItem("Destroy Seed", f=clear_seed),
     MenuItem('Lock Down Seed', f=convert_ephemeral_to_master),
+    MenuItem('Export SeedQR', f=export_seedqr,
+             predicate=lambda: settings.get('words', True)),
 ]
 
 DangerZoneMenu = [

shared/qrs.py

@@ -29,14 +29,14 @@ class QRDisplaySingle(UserInteraction):
         # - inverted QR (black/white swap) still readable by scanners, altho wrong
         if self.is_alnum:
             # targeting 'alpha numeric' mode, nice and dense; caps only tho
-            enc = uqr.Mode_ALPHANUMERIC
+            enc = uqr.Mode_ALPHANUMERIC if not msg.isdigit() else uqr.Mode_NUMERIC
             msg = msg.upper()
         else:
             # has to be 'binary' mode, altho shorter msg, typical 34-36
             enc = uqr.Mode_BYTE
 
         # can fail if not enough space in QR
-        self.qr_data = uqr.make(msg, min_version=3, max_version=11, encoding=enc)
+        self.qr_data = uqr.make(msg, min_version=2, max_version=11, encoding=enc)
 
     def redraw(self):
         # Redraw screen.

shared/ux.py

@@ -364,9 +364,9 @@ async def show_qr_codes(addrs, is_alnum, start_n):
     o = QRDisplaySingle(addrs, is_alnum, start_n, sidebar=None)
     await o.interact_bare()
 
-async def show_qr_code(data, is_alnum):
+async def show_qr_code(data, is_alnum, msg=None):
     from qrs import QRDisplaySingle
-    o = QRDisplaySingle([data], is_alnum)
+    o = QRDisplaySingle([data], is_alnum, sidebar=msg)
     await o.interact_bare()
 
 async def ux_enter_bip32_index(prompt, can_cancel=False, unlimited=False):

testing/test_ux.py

@@ -669,6 +669,46 @@ def test_show_seed(mode, b39_word, goto_home, pick_menu_item, cap_story, need_ke
 
     need_keypress('y')      # clear screen
 
+@pytest.mark.qrcode
+@pytest.mark.parametrize("data", [
+    (simulator_fixed_words, [2007, 1585, 123, 131, 745, 43, 1506, 1930, 664, 749, 1200, 113, 1321, 330, 1764, 698, 1160, 656, 647, 1424, 135, 767, 987, 335]),
+    ("task tube actor end cannon potato sign card occur donkey soup baby tooth bless barely pull gap priority", [1776, 1872, 21, 588, 267, 1350, 1602, 276, 1222, 521, 1663, 136, 1830, 189, 148, 1386, 762, 1367]),
+    ("vacuum bridge buddy supreme exclude milk consider tail expand wasp pattern nuclear", [1924,222,235,1743,631,1124,378,1770,641,1980,1290,1210]),
+    ("approve fruit lens brass ring actual stool coin doll boss strong rate", "008607501025021714880023171503630517020917211425"),
+    ("good battle boil exact add seed angle hurry success glad carbon whisper", "080301540200062600251559007008931730078802752004"),
+    ("forum undo fragile fade shy sign arrest garment culture tube off merit", "073318950739065415961602009907670428187212261116"),
+    ("sound federal bonus bleak light raise false engage round stock update render quote truck quality fringe palace foot recipe labor glow tortoise potato still", "166206750203018810361417065805941507171219081456140818651401074412730727143709940798183613501710"),
+    ("atom solve joy ugly ankle message setup typical bean era cactus various odor refuse element afraid meadow quick medal plate wisdom swap noble shallow", "011416550964188800731119157218870156061002561932122514430573003611011405110613292018175411971576"),
+    ("attack pizza motion avocado network gather crop fresh patrol unusual wild holiday candy pony ranch winter theme error hybrid van cereal salon goddess expire", "011513251154012711900771041507421289190620080870026613431420201617920614089619290300152408010643"),
+])
+def test_show_seed_qr(data, goto_home, pick_menu_item, cap_story, need_keypress,
+                      sim_exec, cap_menu, get_pp_sofar, get_secrets, cap_screen_qr,
+                      set_encoded_secret, qr_quality_check, set_seed_words):
+    n = 4  # SeedQr 4 str chars for each index
+    words, qr_expect = data
+    if isinstance(qr_expect, str):
+        qr_expect = [int(qr_expect[i:i+n]) for i in range(0, len(qr_expect), n)]
+    set_seed_words(words)
+
+    goto_home()
+    pick_menu_item('Advanced/Tools')
+    pick_menu_item('Danger Zone')
+    pick_menu_item('Seed Functions')
+    pick_menu_item('Export SeedQR')
+
+    time.sleep(.01)
+    title, body = cap_story()
+    assert 'Are you SURE' in body
+    assert 'can control all funds' in body
+    need_keypress('y')  # skip warning
+    time.sleep(0.01)
+
+    qr = cap_screen_qr().decode('ascii')
+    qr = [int(qr[i:i+n]) for i in range(0, len(qr), n)]
+    assert qr == qr_expect
+
+    need_keypress('y')  # clear screen
+
 def test_destroy_seed(goto_home, pick_menu_item, cap_story, need_keypress, sim_exec,
                                 cap_menu, get_secrets):