def CheckSig(sig, pubkey, script, txTo, inIdx, hashtype):
key = CKey()
key.set_pubkey(pubkey)
if len(sig) == 0:
return False
if hashtype == 0:
hashtype = ord(sig[-1])
elif hashtype != ord(sig[-1]):
return False
sig = sig[:-1]
tup = SignatureHash(script, txTo, inIdx, hashtype)
return key.verify(ser_uint256(tup[0]), sig)
def CheckSig(sig, pubkey, script, txTo, inIdx, hashtype):
key = CKey()
key.set_pubkey(pubkey)
if len(sig) == 0:
return False
if hashtype == 0:
hashtype = ord(sig[-1])
elif hashtype != ord(sig[-1]):
return False
sig = sig[:-1]
tup = SignatureHash(script, txTo, inIdx, hashtype)
return key.verify(ser_uint256(tup[0]), sig)
def verify(jsonbuf):
'''
:param jsondoc: str with JSON
:type jsondoc: str
returns: bool - True if signature verification succeeds
:raises: BadJSONError
'''
basedict = {}
jsondoc = json.loads(jsonbuf)
signatures = jsondoc.get('signatures', [])
if not len(signatures):
raise BadJSONError('Signatures not found')
for key in jsondoc.get('signed_keys', []):
value = jsondoc.get(key, None)
if not value:
raise BadJSONError('Missing attribute: %s' % (repr(key), ))
basedict[key] = value
ckey = CKey()
sigchecks = []
for signature_dict in signatures:
if 'secp256k1' != signature_dict.get('signature_type', ''):
continue
sig = binascii.unhexlify(signature_dict.get('signature', ''))
pubkey = binascii.unhexlify(signature_dict.get('pubkey', ''))
sigdict = {}
for key in signature_dict.get('extra_signed_keys', []):
value = jsondoc.get(key, None)
if not value:
raise BadJSONError('Missing attribute: %s' % (repr(key), ))
sigdict[key] = value
sigdict.update(basedict)
ckey.set_pubkey(pubkey)
instr = json.dumps(sigdict, separators=(',', ':'), sort_keys=True)
hash = hashlib.sha256(hashlib.sha256(instr).digest()).digest()
sigchecks.append(ckey.verify(hash, sig))
return (sigchecks and 0 not in sigchecks and -1 not in sigchecks)
def verify(jsonbuf):
'''
:param jsondoc: str with JSON
:type jsondoc: str
returns: bool - True if signature verification succeeds
:raises: BadJSONError
'''
basedict = {}
jsondoc = json.loads(jsonbuf)
signatures = jsondoc.get('signatures', [])
if not len(signatures):
raise BadJSONError('Signatures not found')
for key in jsondoc.get('signed_keys', []):
value = jsondoc.get(key, None)
if not value:
raise BadJSONError('Missing attribute: %s' % (repr(key),))
basedict[key] = value
ckey = CKey()
sigchecks = []
for signature_dict in signatures:
if 'secp256k1' != signature_dict.get('signature_type', ''):
continue
sig = binascii.unhexlify(signature_dict.get('signature', ''))
pubkey = binascii.unhexlify(signature_dict.get('pubkey', ''))
sigdict = {}
for key in signature_dict.get('extra_signed_keys', []):
value = jsondoc.get(key, None)
if not value:
raise BadJSONError('Missing attribute: %s' % (repr(key),))
sigdict[key] = value
sigdict.update(basedict)
ckey.set_pubkey(pubkey)
instr = json.dumps(sigdict, separators=(',',':'), sort_keys=True)
hash = hashlib.sha256(hashlib.sha256(instr).digest()).digest()
sigchecks.append(ckey.verify(hash, sig))
return (sigchecks and 0 not in sigchecks and -1 not in sigchecks)
