def verify_signtures_on_payments(inputs, outputs, signatures, verifier,
*extra_fields_for_signing):
correct_sigs_from = []
for inp, sig in zip(inputs, signatures):
try:
sig = base58.b58decode(sig)
except Exception as ex:
raise InvalidSignatureFormat from ex
new_data = [inp, outputs]
new_data.extend(extra_fields_for_signing)
idr = inp[ADDRESS]
ser = serialize_msg_for_signing(new_data)
try:
verkey = address_to_verkey(idr)
except ValueError:
continue
vr = verifier(verkey)
if vr.verify(sig, ser):
correct_sigs_from.append(idr)
if len(correct_sigs_from) != len(inputs):
# All inputs should have signatures present
raise InsufficientCorrectSignatures(len(correct_sigs_from),
len(inputs))
return correct_sigs_from
def authenticate_multi(self,
msg: Dict,
signatures: Dict[str, str],
threshold: int = None,
verifier: Verifier = DidVerifier):
num_sigs = len(signatures)
if threshold is not None:
if num_sigs < threshold:
raise InsufficientSignatures(num_sigs, threshold)
else:
threshold = num_sigs
correct_sigs_from = []
for idr, sig in signatures.items():
try:
sig = base58.b58decode(sig)
except Exception as ex:
raise InvalidSignatureFormat from ex
ser = self.serializeForSig(msg, identifier=idr)
verkey = self.getVerkey(idr)
if verkey is None:
raise CouldNotAuthenticate(
'Can not find verkey for {}'.format(idr))
vr = verifier(verkey, identifier=idr)
if vr.verify(sig, ser):
correct_sigs_from.append(idr)
if len(correct_sigs_from) == threshold:
break
else:
raise InsufficientCorrectSignatures(len(correct_sigs_from),
threshold)
return correct_sigs_from
def test_friendly_exception_formatting_multiple_exceptions():
"""
Check if the `friendyEx` is formatting multiple exceptions with and without reason field correctly
"""
ex1 = InsufficientCorrectSignatures(1, 2, {
'6ouriXMZkLeHsuXrN1X1fd':
'3GoEPiwhJUjALzrXmmE9tFTXAi7Emv8Y8jjSxQyQB'
})
ex2 = InsufficientSignatures(1, 3)
ex2.__cause__ = ex1
ex3 = SigningException()
ex3.__cause__ = ex2
expected = '{} [caused by {} [caused by {}]]'.format(
ex3, ex2.reason, ex1.reason)
formatted_exception = friendlyEx(ex3)
assert formatted_exception == expected
