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ecc: add test that verify_usermessage does not enforce low-S rule

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This commit is contained in:
SomberNight
2024-05-27 17:09:45 +00:00
parent bafd52ec6d
commit d61c6037ea
2 changed files with 11 additions and 0 deletions
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9
tests/test_bitcoin.py
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@@ -246,6 +246,15 @@ class Test_bitcoin(ElectrumTestCase):
self.assertFalse(ecc.verify_usermessage_with_address(addr1, b'wrong', msg1))
self.assertFalse(ecc.verify_usermessage_with_address(addr1, sig2, msg1))
def test_signmessage_low_s(self):
"""`$ bitcoin-cli verifymessage` does NOT enforce the low-S rule for ecdsa sigs. This tests we do the same."""
addr = "15hETetDmcXm1mM4sEf7U2KXC9hDHFMSzz"
sig_low_s = b'Hzsu0U/THAsPz/MSuXGBKSULz2dTfmrg1NsAhFp+wH5aKfmX4Db7ExLGa7FGn0m6Mf43KsbEOWpvUUUBTM3Uusw='
sig_high_s = b'IDsu0U/THAsPz/MSuXGBKSULz2dTfmrg1NsAhFp+wH5a1gZoH8kE7O05lE65YLZFzLx3sh/rDzXMbo1dQAJhhnU='
msg = b'Chancellor on brink of second bailout for banks'
self.assertTrue(ecc.verify_usermessage_with_address(address=addr, sig65=base64.b64decode(sig_low_s), message=msg))
self.assertTrue(ecc.verify_usermessage_with_address(address=addr, sig65=base64.b64decode(sig_high_s), message=msg))
def test_signmessage_segwit_witness_v0_address(self):
msg = b'Electrum'
# p2wpkh-p2sh