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Code Issues Releases Wiki Activity

When checking test vectors, handle RuntimeException in signing

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This is better for playing around with the code. Now these
these exceptions can really be raised when the verification
during signing fails.
This commit is contained in:
Tim Ruffing 2020-03-17 02:30:39 +01:00
parent 07d938a214
commit 72657270d8
1 changed files with 12 additions and 8 deletions
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6
bip-0340/reference.py
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@ -122,7 +122,7 @@ def schnorr_sign(msg, seckey, aux_rand):
sig = bytes_from_point(R) + bytes_from_int((k + e * d) % n) sig = bytes_from_point(R) + bytes_from_int((k + e * d) % n)
debug_print_vars() debug_print_vars()
if not schnorr_verify(msg, bytes_from_point(P), sig): if not schnorr_verify(msg, bytes_from_point(P), sig):
raise RuntimeError('The signature does not pass verification.') raise RuntimeError('The created signature does not pass verification.')
return sig return sig
def schnorr_verify(msg, pubkey, sig): def schnorr_verify(msg, pubkey, sig):
@ -173,6 +173,7 @@ def test_vectors():
print(' Expected key:', pubkey.hex().upper()) print(' Expected key:', pubkey.hex().upper())
print(' Actual key:', pubkey_actual.hex().upper()) print(' Actual key:', pubkey_actual.hex().upper())
aux_rand = bytes.fromhex(aux_rand) aux_rand = bytes.fromhex(aux_rand)
try:
sig_actual = schnorr_sign(msg, seckey, aux_rand) sig_actual = schnorr_sign(msg, seckey, aux_rand)
if sig == sig_actual: if sig == sig_actual:
print(' * Passed signing test.') print(' * Passed signing test.')
@ -181,6 +182,9 @@ def test_vectors():
print(' Expected signature:', sig.hex().upper()) print(' Expected signature:', sig.hex().upper())
print(' Actual signature:', sig_actual.hex().upper()) print(' Actual signature:', sig_actual.hex().upper())
all_passed = False all_passed = False
except RuntimeError as e:
print(' * Signing test raised exception:', e)
all_passed = False
result_actual = schnorr_verify(msg, pubkey, sig) result_actual = schnorr_verify(msg, pubkey, sig)
if result == result_actual: if result == result_actual:
print(' * Passed verification test.') print(' * Passed verification test.')