def update_signatures(self, raw):
"""Add new signatures to a transaction"""
d = deserialize(raw)
for i, txin in enumerate(self.inputs()):
sigs1 = txin.get('signatures')
sigs2 = d['inputs'][i].get('signatures')
for sig in sigs2:
if sig in sigs1:
continue
for_sig = Hash(self.tx_for_sig(i).decode('hex'))
# der to string
order = ecdsa.ecdsa.generator_secp256k1.order()
r, s = ecdsa.util.sigdecode_der(sig.decode('hex'), order)
sig_string = ecdsa.util.sigencode_string(r, s, order)
pubkeys = txin.get('pubkeys')
compressed = True
for recid in range(4):
public_key = MyVerifyingKey.from_signature(sig_string,
recid,
for_sig,
curve=SECP256k1)
pubkey = point_to_ser(public_key.pubkey.point,
compressed).encode('hex')
if pubkey in pubkeys:
public_key.verify_digest(
sig_string,
for_sig,
sigdecode=ecdsa.util.sigdecode_string)
j = pubkeys.index(pubkey)
print_error("adding sig", i, j, pubkey, sig)
self._inputs[i]['signatures'][j] = sig
self._inputs[i]['x_pubkeys'][j] = pubkey
break
# redo raw
self.raw = self.serialize()
def _do_test_crypto(self, message):
G = generator_secp256k1
_r = G.order()
pvk = ecdsa.util.randrange(pow(2, 256)) % _r
Pub = pvk * G
pubkey_c = point_to_ser(Pub, True)
# pubkey_u = point_to_ser(Pub,False)
addr_c = public_key_to_address(pubkey_c)
# addr_u = public_key_to_bc_address(pubkey_u)
# print "Private key ", '%064x'%pvk
eck = EC_KEY(number_to_string(pvk, _r))
# print "Compressed public key ", pubkey_c.encode('hex')
enc = EC_KEY.encrypt_message(message, pubkey_c)
dec = eck.decrypt_message(enc)
assert dec == message
# print "Uncompressed public key", pubkey_u.encode('hex')
# enc2 = EC_KEY.encrypt_message(message, pubkey_u)
dec2 = eck.decrypt_message(enc)
assert dec2 == message
signature = eck.sign_message(message, True, addr_c)
# print signature
EC_KEY.verify_message(addr_c, signature, message)
def update_signatures(self, raw):
"""Add new signatures to a transaction"""
d = deserialize(raw)
for i, txin in enumerate(self.inputs()):
sigs1 = txin.get('signatures')
sigs2 = d['inputs'][i].get('signatures')
for sig in sigs2:
if sig in sigs1:
continue
for_sig = Hash(self.tx_for_sig(i).decode('hex'))
# der to string
order = ecdsa.ecdsa.generator_secp256k1.order()
r, s = ecdsa.util.sigdecode_der(sig.decode('hex'), order)
sig_string = ecdsa.util.sigencode_string(r, s, order)
pubkeys = txin.get('pubkeys')
compressed = True
for recid in range(4):
public_key = MyVerifyingKey.from_signature(sig_string, recid, for_sig,
curve=SECP256k1)
pubkey = point_to_ser(public_key.pubkey.point, compressed).encode('hex')
if pubkey in pubkeys:
public_key.verify_digest(sig_string, for_sig,
sigdecode=ecdsa.util.sigdecode_string)
j = pubkeys.index(pubkey)
print_error("adding sig", i, j, pubkey, sig)
self._inputs[i]['signatures'][j] = sig
self._inputs[i]['x_pubkeys'][j] = pubkey
break
# redo raw
self.raw = self.serialize()