def sender(self):
if not self._sender:
# Determine sender
if self.v:
if self.r >= N or self.s >= N or self.v < 27 or self.v > 28 \
or self.r == 0 or self.s == 0:
raise InvalidTransaction("Invalid signature values!")
log.debug('recovering sender')
rlpdata = rlp.encode(self, UnsignedTransaction)
rawhash = utils.sha3(rlpdata)
pk = PublicKey(flags=ALL_FLAGS)
try:
pk.public_key = pk.ecdsa_recover(
rawhash,
pk.ecdsa_recoverable_deserialize(
zpad(utils.bytearray_to_bytestr(int_to_32bytearray(self.r)), 32) + zpad(utils.bytearray_to_bytestr(int_to_32bytearray(self.s)), 32),
self.v - 27
),
raw=True
)
pub = pk.serialize(compressed=False)
except Exception:
raise InvalidTransaction("Invalid signature values (x^3+7 is non-residue)")
if pub[1:] == b"\x00" * 32:
raise InvalidTransaction("Invalid signature (zero privkey cannot sign)")
pub = encode_pubkey(pub, 'bin')
self._sender = utils.sha3(pub[1:])[-20:]
assert self.sender == self._sender
else:
self._sender = 0
return self._sender
class Secp256k1_compact(object):
def __init__(self):
self.priv_key = PrivateKey()
self.pub_key = PublicKey(pubkey=None, raw=False, flags=secp256k1.ALL_FLAGS)
def ecdsa_compact_sign(self, msg32, privkey):
if type(privkey) == unicode:
privkey = privkey.encode('utf-8')
self.priv_key.set_raw_privkey(privkey)
sig = self.priv_key.ecdsa_sign_recoverable(msg32, raw=True)
return self.priv_key.ecdsa_recoverable_serialize(sig)
def ecdsa_compact_recover(self, msg32, sign):
if not len(sign) == 2:
sign = (sign[:64], ord(sign[64]))
assert len(sign) == 2
deserialized_sig = self.pub_key.ecdsa_recoverable_deserialize(sign[0], sign[1])
self.pub_key.public_key = self.pub_key.ecdsa_recover(msg32, deserialized_sig, raw=True)
return self.pub_key.serialize(compressed=False)
def ecdsa_compact_verify(self, msg32, sign, pub):
# Check if pubkey has been bin_electrum encoded.
# If so, append \04 to the front of the key, to make sure the length is 65
if len(pub) == 64:
pub = '\04'+pub
pub_k = PublicKey().deserialize(pub)
pub_key = PublicKey(pub_k, raw=False, flags=secp256k1.ALL_FLAGS)
der_sig = pub_key.ecdsa_recoverable_deserialize(sign[0], sign[1])
raw_sig = pub_key.ecdsa_recoverable_convert(der_sig)
return pub_key.ecdsa_verify(msg32, raw_sig, raw=True)
def verify(base64sig, msg, address, ctx=None, net=BC):
if len(base64sig) != 88:
raise Exception("Invalid base64 signature length")
msg = msg.encode('utf8')
fullmsg = (varint(len(net.msgprefix)) + net.msgprefix + varint(len(msg)) +
msg)
hmsg = shasha(fullmsg).digest()
sigbytes = base64.b64decode(base64sig)
if len(sigbytes) != 65:
raise Exception("Invalid signature length")
compressed = (ord(sigbytes[0:1]) - 27) & 4 != 0
rec_id = (ord(sigbytes[0:1]) - 27) & 3
p = PublicKey(ctx=ctx, flags=ALL_FLAGS)
sig = p.ecdsa_recoverable_deserialize(sigbytes[1:], rec_id)
# Recover the ECDSA public key.
recpub = p.ecdsa_recover(hmsg, sig, raw=True)
pubser = PublicKey(recpub, ctx=ctx).serialize(compressed=compressed)
addr = pubkey_to_addr(pubser, net)
return addr == address
def verifyData(self, data):
# verify hash
msg_hash = data[:32]
if msg_hash != keccak256(data[32:]):
print " First 32 bytes are not keccak256 hash of the rest."
return
else:
print " Verified message hash."
# verify signature
signature = data[32:97]
signed_data = data[97:]
deserialized_sig = self.priv_key.ecdsa_recoverable_deserialize(signature[:64], ord(signature[64]))
remote_pubkey = self.priv_key.ecdsa_recover(keccak256(signed_data), deserialized_sig, raw = True)
pub = PublicKey()
pub.public_key = remote_pubkey
verified = pub.ecdsa_verify(keccak256(signed_data),
pub.ecdsa_recoverable_convert(deserialized_sig),
raw = True)
if not verified:
print " Signature invalid"
return False
else:
print " Verified signature."
return True
def __validate_icx_signature(self, tx_hash, signature, address) -> bool:
"""
:param tx_hash:
:param signature:
:param address:
:return:
"""
try:
origin_signature, recover_code = signature[:-1], signature[-1]
recoverable_sig = self.__pri.ecdsa_recoverable_deserialize(origin_signature, recover_code)
pub = self.__pri.ecdsa_recover(binascii.unhexlify(tx_hash),
recover_sig=recoverable_sig,
raw=True,
digest=hashlib.sha3_256)
public_key = PublicKey(pub, ctx=self.__ctx_cached)
hash_pub = hashlib.sha3_256(public_key.serialize(compressed=False)[1:]).hexdigest()
expect_address = f"hx{hash_pub[-40:]}"
if expect_address != address:
logging.info(f"tx address validate fail expect : {expect_address} input : {address}")
raise TransactionInvalidAddressNotMatchError(tx_hash, address, expect_address)
return True
except TransactionInvalidAddressNotMatchError as e:
raise e
except Exception as e:
logging.error(f"tx signature validate fail cause {e}")
traceback.print_exc()
raise TransactionInvalidSignatureError(tx_hash, signature, address)
def _recover_key(msg_hash: bytes, signature: bytes,
compressed: bool) -> Optional[bytes]:
"""Returns the public key from message hash and recoverable signature
:param msg_hash: 32 bytes data
:param signature: signature_data(64) + recovery_id(1)
:param compressed: the type of public key to return
:return: public key recovered from msg_hash and signature
(compressed: 33 bytes key, uncompressed: 65 bytes key)
"""
if isinstance(msg_hash, bytes) \
and len(msg_hash) == 32 \
and isinstance(signature, bytes) \
and len(signature) == 65:
internal_recover_sig = _public_key.ecdsa_recoverable_deserialize(
ser_sig=signature[:64], rec_id=signature[64])
internal_pubkey = _public_key.ecdsa_recover(msg_hash,
internal_recover_sig,
raw=True,
digest=None)
public_key = PublicKey(internal_pubkey, raw=False, ctx=_public_key.ctx)
return public_key.serialize(compressed)
return None
def verify(base64sig, msg, address, ctx=None, net=BC):
if len(base64sig) != 88:
raise Exception("Invalid base64 signature length")
msg = msg.encode('utf8')
fullmsg = (varint(len(net.msgprefix)) + net.msgprefix +
varint(len(msg)) + msg)
hmsg = shasha(fullmsg).digest()
sigbytes = base64.b64decode(base64sig)
if len(sigbytes) != 65:
raise Exception("Invalid signature length")
compressed = (ord(sigbytes[0:1]) - 27) & 4 != 0
rec_id = (ord(sigbytes[0:1]) - 27) & 3
p = PublicKey(ctx=ctx, flags=ALL_FLAGS)
sig = p.ecdsa_recoverable_deserialize(sigbytes[1:], rec_id)
# Recover the ECDSA public key.
recpub = p.ecdsa_recover(hmsg, sig, raw=True)
pubser = PublicKey(recpub, ctx=ctx).serialize(compressed=compressed)
addr = pubkey_to_addr(pubser, net)
return addr == address
def ecdsa_verify(pubkey, signature, message):
assert len(signature) == 65
assert len(pubkey) == 64
pk = PublicKey('\04' + pubkey, raw=True, ctx=ctx)
return pk.ecdsa_verify(message,
pk.ecdsa_recoverable_convert(
pk.ecdsa_recoverable_deserialize(
signature[:64], ord(signature[64]))),
raw=True)
def ecdsa_compact_verify(self, msg32, sign, pub):
# Check if pubkey has been bin_electrum encoded.
# If so, append \04 to the front of the key, to make sure the length is 65
if len(pub) == 64:
pub = '\04'+pub
pub_k = PublicKey().deserialize(pub)
pub_key = PublicKey(pub_k, raw=False, flags=secp256k1.ALL_FLAGS)
der_sig = pub_key.ecdsa_recoverable_deserialize(sign[0], sign[1])
raw_sig = pub_key.ecdsa_recoverable_convert(der_sig)
return pub_key.ecdsa_verify(msg32, raw_sig, raw=True)
def sender(self):
if not self._sender:
if not is_bitcoin_available() or not is_secp256k1_available():
raise ImportError(
"In order to derive the sender for transactions the "
"`bitcoin` and `secp256k1` packages must be installed."
)
from bitcoin import N
from secp256k1 import PublicKey, ALL_FLAGS
# Determine sender
if self.v:
has_invalid_signature_values = (
self.r >= N or
self.s >= N or
self.v < 27 or
self.v > 28 or
self.r == 0 or
self.s == 0
)
if has_invalid_signature_values:
raise ValueError("Invalid signature values!")
rlpdata = rlp.encode(self, UnsignedTransaction)
rawhash = decode_hex(sha3(rlpdata))
pk = PublicKey(flags=ALL_FLAGS)
try:
pk.public_key = pk.ecdsa_recover(
rawhash,
pk.ecdsa_recoverable_deserialize(
pad_left(
int_to_big_endian(self.r),
32,
b'\x00',
) + pad_left(
int_to_big_endian(self.s),
32,
b'\x00',
),
self.v - 27
),
raw=True
)
pub = pk.serialize(compressed=False)
except Exception:
raise ValueError("Invalid signature values (x^3+7 is non-residue)")
if pub[1:] == b"\x00" * (len(pub) - 1):
raise ValueError("Invalid signature (zero privkey cannot sign)")
self._sender = to_address(sha3(pub[1:])[-40:])
assert self.sender == self._sender
else:
self._sender = 0
return self._sender
def receive(self, data, addr):
"""
macSize = 256 / 8 = 32
sigSize = 520 / 8 = 65
headSize = macSize + sigSize = 97
hash, sig, sigdata := buf[:macSize], buf[macSize:headSize], buf[headSize:]
shouldhash := crypto.Sha3(buf[macSize:])
"""
# verify hash
msg_hash = data[:32]
if msg_hash != keccak256(data[32:]):
print " First 32 bytes are not keccak256 hash of the rest."
return
else:
print " Verified message hash."
# verify signature
signature = data[32:97]
signed_data = data[97:]
deserialized_sig = self.priv_key.ecdsa_recoverable_deserialize(signature[:64],
ord(signature[64]))
remote_pubkey = self.priv_key.ecdsa_recover(keccak256(signed_data),
deserialized_sig,
raw=True)
pub = PublicKey()
pub.public_key = remote_pubkey
verified = pub.ecdsa_verify(keccak256(signed_data),
pub.ecdsa_recoverable_convert(deserialized_sig),
raw=True)
if not verified:
print " Signature invalid"
return
else:
print " Verified signature."
response_types = {
PingNode.packet_type: self.receive_ping,
Pong.packet_type: self.receive_pong,
FindNeighbors.packet_type: self.receive_find_neighbors,
Neighbors.packet_type: self.receive_neighbors
}
try:
packet_type = data[97]
dispatch = response_types[packet_type]
except KeyError:
print " Unknown message type: " + data[97]
return
payload = data[98:]
dispatch(payload, msg_hash, addr)
def verify(self, message):
pub = PublicKey(self.pub_key, raw=True)
message = VarInt(len(message)).encode() + message
# LOGGER.debug("Comparing with %r" % (MESSAGE_TEMPLATE % message))
try:
sig_raw = pub.ecdsa_deserialize(self.sig_ser)
good = pub.ecdsa_verify(MESSAGE_TEMPLATE % message, sig_raw)
except Exception:
LOGGER.exception("Verification failed")
good = False
return good
def check_sig(public_key, signature, message):
raw = bytes(bytearray.fromhex(public_key))
sig = bytes(bytearray.fromhex(signature))
pub = PublicKey(raw, raw=True)
try:
sig_raw = pub.ecdsa_deserialize(sig)
good = pub.ecdsa_verify(bytes(bytearray.fromhex(message)), sig_raw)
except:
good = False
print(u"{}\n".format(good))
return 0 if good else 1
def verify_message(message):
"""验证信息有效性"""
# 验证公钥
if message.sender != pubkey2address(message.pubkey):
return False
# 验证签名
ecc_pubkey = PublicKey(bytes(bytearray.fromhex(message.pubkey)), raw=True)
# print(ecc_pubkey)
sign = ecc_pubkey.ecdsa_deserialize(binascii.unhexlify(message.sign))
verified = ecc_pubkey.ecdsa_verify(binascii.unhexlify(message.content), sign)
# print(verified)
return verified
def verify_sign(message, pubkey, address, sign):
"""verify message sign"""
# verify public key
if address != pubkey2address(pubkey):
return False
# verify sign
ecc_pubkey = PublicKey(bytes(bytearray.fromhex(pubkey)), raw=True)
# print(ecc_pubkey)
sign = ecc_pubkey.ecdsa_deserialize(binascii.unhexlify(sign))
verified = ecc_pubkey.ecdsa_verify(binascii.unhexlify(message), sign)
# print(verified)
return verified
def receive(self):
print "listening..."
data, addr = self.sock.recvfrom(1024)
print "received message[", addr, "]"
## verify hash
msg_hash = data[:32]
if msg_hash != keccak256(data[32:]):
print " First 32 bytes are not keccak256 hash of the rest."
return
else:
print " Verified message hash."
## verify signature
signature = data[32:97]
signed_data = data[97:]
deserialized_sig = self.priv_key.ecdsa_recoverable_deserialize(
signature[:64], ord(signature[64]))
remote_pubkey = self.priv_key.ecdsa_recover(keccak256(signed_data),
deserialized_sig,
raw=True)
pub = PublicKey()
pub.public_key = remote_pubkey
verified = pub.ecdsa_verify(
keccak256(signed_data),
pub.ecdsa_recoverable_convert(deserialized_sig),
raw=True)
if not verified:
print " Signature invalid"
return
else:
print " Verified signature."
response_types = {
PingNode.packet_type: self.receive_ping,
Pong.packet_type: self.receive_pong
}
try:
packet_type = data[97]
dispatch = response_types[packet_type]
except KeyError:
print " Unknown message type: " + data[97]
return
payload = data[98:]
dispatch(payload)
def _test_signature(public_key, private_key, msg):
print('uncompressed pub key %i bytes: %s' %
(len(public_key), public_key.hex()))
comp_pubkey = Key.from_sec(public_key)
print('compressed pub key: %s' %
comp_pubkey.sec_as_hex(use_uncompressed=False))
secp_pubkey = PublicKey(public_key, raw=True)
secp_privkey = PrivateKey(private_key, raw=True)
print('checking signature')
signature = secp_privkey.ecdsa_sign(msg)
if (secp_pubkey.ecdsa_verify(msg, signature)):
print('signature OK')
else:
raise Exception('signature test failed')
def _recover_key(msg_hash: bytes, signature: bytes, compressed: bool) -> Optional[bytes]:
if isinstance(msg_hash, bytes) \
and len(msg_hash) == 32 \
and isinstance(signature, bytes) \
and len(signature) == 65:
internal_recover_sig = _public_key.ecdsa_recoverable_deserialize(
ser_sig=signature[:64], rec_id=signature[64])
internal_pubkey = _public_key.ecdsa_recover(
msg_hash, internal_recover_sig, raw=True, digest=None)
public_key = PublicKey(internal_pubkey, raw=False, ctx=_public_key.ctx)
return public_key.serialize(compressed)
return None
def getDeployedSecret(dongle, masterPrivate, targetid):
testMaster = PrivateKey(bytes(masterPrivate))
testMasterPublic = bytearray(testMaster.pubkey.serialize(compressed=False))
targetid = bytearray(struct.pack('>I', targetid))
# identify
apdu = bytearray([0xe0, 0x04, 0x00, 0x00]) + bytearray([len(targetid)]) + targetid
dongle.exchange(apdu)
# walk the chain
batch_info = bytearray(dongle.exchange(bytearray.fromhex('E050000000')))
cardKey = batch_info[5:5 + batch_info[4]]
# if not found, get another pair
#if cardKey <> testMasterPublic:
# raise Exception("Invalid batch public key")
# provide the ephemeral certificate
ephemeralPrivate = PrivateKey()
ephemeralPublic = bytearray(ephemeralPrivate.pubkey.serialize(compressed=False))
print "Using ephemeral key " + str(ephemeralPublic).encode('hex')
signature = testMaster.ecdsa_sign(bytes(ephemeralPublic))
signature = testMaster.ecdsa_serialize(signature)
certificate = bytearray([len(ephemeralPublic)]) + ephemeralPublic + bytearray([len(signature)]) + signature
apdu = bytearray([0xE0, 0x51, 0x00, 0x00]) + bytearray([len(certificate)]) + certificate
dongle.exchange(apdu)
# walk the device certificates to retrieve the public key to use for authentication
index = 0
last_pub_key = PublicKey(bytes(testMasterPublic), raw=True)
while True:
certificate = bytearray(dongle.exchange(bytearray.fromhex('E052000000')))
if len(certificate) == 0:
break
certificatePublic = certificate[1 : 1 + certificate[0]]
certificateSignature = last_pub_key.ecdsa_deserialize(bytes(certificate[2 + certificate[0] :]))
if not last_pub_key.ecdsa_verify(bytes(certificatePublic), certificateSignature):
if index == 0:
# Not an error if loading from user key
print "Broken certificate chain - loading from user key"
else:
raise Exception("Broken certificate chain")
last_pub_key = PublicKey(bytes(certificatePublic), raw=True)
index = index + 1
# Commit device ECDH channel
dongle.exchange(bytearray.fromhex('E053000000'))
secret = last_pub_key.ecdh(bytes(ephemeralPrivate.serialize().decode('hex')))
return str(secret[0:16])
def recover_publickey(messagedata, signature):
if len(signature) != 65:
raise ValueError('invalid signature')
key = PublicKey(flags=ALL_FLAGS) # FLAG_SIGN is required to recover publickeys
signature_data = key.ecdsa_recoverable_deserialize(
signature[:64],
ord(signature[64]),
)
message_hash = sha3(messagedata)
publickey_data = key.ecdsa_recover(message_hash, signature_data, raw=True)
publickey = PublicKey(publickey_data).serialize(compressed=False)
return publickey
def verify_signature(self, tx: 'Transaction'):
recoverable_sig = self._ecdsa.ecdsa_recoverable_deserialize(
tx.signature.signature(),
tx.signature.recover_id())
raw_public_key = self._ecdsa.ecdsa_recover(tx.hash,
recover_sig=recoverable_sig,
raw=True,
digest=hashlib.sha3_256)
public_key = PublicKey(raw_public_key, ctx=self._ecdsa.ctx)
hash_pub = hashlib.sha3_256(public_key.serialize(compressed=False)[1:]).digest()
expect_address = hash_pub[-20:]
if expect_address != tx.from_address:
raise RuntimeError(f"tx from address {tx.from_address.hex_xx()}, "
f"expected {ExternalAddress(expect_address).hex_xx()}")
def verify_signature(self, block: 'Block'):
recoverable_sig = self._ecdsa.ecdsa_recoverable_deserialize(
block.header.signature.signature(),
block.header.signature.recover_id())
raw_public_key = self._ecdsa.ecdsa_recover(block.header.hash,
recover_sig=recoverable_sig,
raw=True,
digest=hashlib.sha3_256)
public_key = PublicKey(raw_public_key, ctx=self._ecdsa.ctx)
hash_pub = hashlib.sha3_256(public_key.serialize(compressed=False)[1:]).digest()
expect_address = hash_pub[-20:]
if expect_address != block.header.peer_id:
exception = RuntimeError(f"block peer id {block.header.peer_id.hex_xx()}, "
f"expected {ExternalAddress(expect_address).hex_xx()}")
self._handle_exception(exception)
def __init__(self, data, raw=True):
"""
Refer to https://github.com/ludbb/secp256k1-py api documents.
:param data: 65 bytes data which PublicKey.serialize() returns.
:param raw: if False, it is assumed that pubkey has gone through PublicKey.deserialize already, otherwise it must be specified as bytes.
"""
self.__pubkey = PublicKey(data, raw, FLAG_VERIFY)
def validate(self, transaction, unspent_tx_outs):
if not self.validate_struct():
return False
utx_out = None
for unspent_tx_out in unspent_tx_outs:
if unspent_tx_out.tx_out_id == self.tx_out_id and unspent_tx_out.tx_out_index == self.tx_out_index:
utx_out = unspent_tx_out
if utx_out is None:
return False
pubkey = PublicKey(unhexlify(utx_out.address), raw=True)
if not pubkey.ecdsa_verify(
unhexlify(transaction.id),
pubkey.ecdsa_deserialize(unhexlify(self.signature))):
logging.error("invalid tx_in signature")
return False
return True
def add_node(gid, pubkey, plugin=None):
"""Add a mesh-connected node to the routing table.
arg: gid: integer within valid goTenna GID range
arg: pubkey: a node's lightning pubkey
"""
# Check that GID and pubkey are valid
_gid = int(gid)
if not 0 <= _gid <= GID_MAX:
return f"GID {_gid} not in range 0 <= n <= {GID_MAX}"
try:
_pubkey = PublicKey(pubkey=bytes.fromhex(pubkey), raw=True)
except Exception as e:
logger.exception("Error with pubkey")
return f"Error with pubkey: {e}"
# Add to router
_node = network.Node(_gid, str(pubkey))
# Check for dupes
if _gid in router:
return (f"GID {_gid} already in router, remove before adding again: "
f"{router.get_node(_gid)}")
elif pubkey in router:
return (
f"Pubkey {pubkey} already in router, remove before adding again: "
f"{router.get_node(router.get_gid(pubkey))}")
else:
router.add(_node)
return f"{_node} added to gotenna plugin router."
async def verify_signature(address_bytes, random_bytes, sign_bytes, private_key):
recoverable_sig = private_key.ecdsa_recoverable_deserialize(
ser_sig=sign_bytes[:-1],
rec_id=sign_bytes[-1]
)
raw_public_key = private_key.ecdsa_recover(
msg=random_bytes,
recover_sig=recoverable_sig,
raw=True,
digest=hashlib.sha3_256
)
public_key = PublicKey(raw_public_key)
hash_pub = hashlib.sha3_256(public_key.serialize(compressed=False)[1:]).digest()
expect_address = hash_pub[-20:]
if expect_address != address_bytes:
raise RuntimeError
def recover_publickey(messagedata, signature):
if len(signature) != 65:
raise ValueError('invalid signature')
key = PublicKey(
flags=ALL_FLAGS) # FLAG_SIGN is required to recover publickeys
signature_data = key.ecdsa_recoverable_deserialize(
signature[:64],
ord(signature[64]),
)
message_hash = sha3(messagedata)
publickey_data = key.ecdsa_recover(message_hash, signature_data, raw=True)
publickey = PublicKey(publickey_data).serialize(compressed=False)
return publickey
def _convert_key(public_key: bytes, compressed: bool) -> Optional[bytes]:
"""Convert key between compressed and uncompressed keys
:param public_key: compressed or uncompressed key
:return: the counterpart key of a given public_key
"""
public_key = PublicKey(public_key, raw=True, flags=NO_FLAGS, ctx=_public_key.ctx)
return public_key.serialize(compressed=not compressed)
def recover(message: Union[bytes, str],
signature: str,
hex: bool = True) -> str:
"""Signs input data with provided private key
Args:
message (str): Message to recover address from
signature (str): Signature with recovery bit
hex (bool): Hex string is provided as input message
Returns:
signature (str): Recoverable signature with appended recovery bit
"""
if type(message) == str and hex:
data = bytes.fromhex(message)
elif type(message) == str:
data = message.encode("utf-8")
else:
data = message
pub_key = PublicKey(flags=ALL_FLAGS)
signature = bytes.fromhex(signature)
signature = pub_key.ecdsa_recoverable_deserialize(
signature[:-1], int.from_bytes(signature[-1:], "big"))
pub_key = PublicKey(pub_key.ecdsa_recover(data, signature,
digest=sha3_256))
return address_from_public(pub_key.serialize(False).hex()[2:])
def check_signature(message: bytes, signature: str, pub_key: str):
try:
pub_key = PublicKey(bytes(bytearray.fromhex(pub_key)), raw=True)
sig = pub_key.ecdsa_deserialize_compact(
bytes(bytearray.fromhex(signature)))
return pub_key.ecdsa_verify(message, sig)
except Exception as ex:
log.exception(ex)
return False
def extract_ecdsa_signer(msg_hash, signature):
msg_hash_bytes = decode_hex(msg_hash) if msg_hash.startswith(b'0x') else msg_hash
signature_bytes = decode_hex(signature) if signature.startswith(b'0x') else signature
pk = PublicKey(flags=ALL_FLAGS)
rec_id = signature_bytes[64]
if is_string(rec_id):
rec_id = ord(rec_id)
pk.public_key = pk.ecdsa_recover(
msg_hash_bytes,
pk.ecdsa_recoverable_deserialize(
signature_bytes[:64], rec_id,
),
raw=True,
)
pk_serialized = pk.serialize(compressed=False)
address = add_0x_prefix(sha3(encode_pubkey(pk_serialized, 'bin')[1:])[-40:])
return address
def proc_ecrecover(ext, msg):
# print('ecrecover proc', msg.gas)
OP_GAS = opcodes.GECRECOVER
gas_cost = OP_GAS
if msg.gas < gas_cost:
return 0, 0, []
message_hash_bytes = [0] * 32
msg.data.extract_copy(message_hash_bytes, 0, 0, 32)
message_hash = b''.join(map(ascii_chr, message_hash_bytes))
# TODO: This conversion isn't really necessary.
# TODO: Invesitage if the check below is really needed.
v = msg.data.extract32(32)
r = msg.data.extract32(64)
s = msg.data.extract32(96)
if r >= bitcoin.N or s >= bitcoin.N or v < 27 or v > 28:
return 1, msg.gas - opcodes.GECRECOVER, []
signature_bytes = [0] * 64
msg.data.extract_copy(signature_bytes, 0, 64, 32)
msg.data.extract_copy(signature_bytes, 32, 96, 32)
signature = b''.join(map(ascii_chr, signature_bytes))
pk = PublicKey(flags=ALL_FLAGS)
try:
pk.public_key = pk.ecdsa_recover(
message_hash,
pk.ecdsa_recoverable_deserialize(
signature,
v - 27
),
raw=True
)
except Exception:
# Recovery failed
return 1, msg.gas - gas_cost, []
pub = pk.serialize(compressed=False)
o = [0] * 12 + [safe_ord(x) for x in utils.sha3(pub[1:])[-20:]]
return 1, msg.gas - gas_cost, o
def verify_recoverable_message(signature, message, recid):
""" Verifies a signature of a hash and returns the address that signed it.
If no address is returned, signature is bad.
"""
empty = PublicKey(flags=ALL_FLAGS)
sig = empty.ecdsa_recoverable_deserialize(signature, args.recid)
msg = MESSAGE_TEMPLATE.format(message)
pubkey = empty.ecdsa_recover(msg, sig)
addr_hash = public_key_to_hash(pubkey.serialize())
address = address_from_hash(address)
try:
sig_raw = pub.ecdsa_deserialize(signature)
good = pub.ecdsa_verify(message, sig_raw)
except:
good = False
if good:
return address
else:
return None
def ecrecover(msg, signature, address=None):
"""
Returns None on failure, returns the recovered address on success.
If address is provided: Returns True if the recovered address matches it,
otherwise False.
"""
rawhash = sha3(msg)
if len(signature) >= 65:
v = safe_ord(signature[64]) + 27
r = big_endian_to_int(signature[0:32])
s = big_endian_to_int(signature[32:64])
else:
if address:
return False
else:
return None
pk = PublicKey(flags=ALL_FLAGS)
pk.public_key = pk.ecdsa_recover(
rawhash,
pk.ecdsa_recoverable_deserialize(
zpad(bytearray_to_bytestr(int_to_32bytearray(r)), 32) +
zpad(bytearray_to_bytestr(int_to_32bytearray(s)), 32), v - 27),
raw=True)
pub = pk.serialize(compressed=False)
recaddr = data_encoder(sha3(pub[1:])[-20:])
if address:
if not address.startswith("0x"):
recaddr = recaddr[2:]
return recaddr == address
return recaddr
def recover_sender(self):
if self.v:
if self.r >= N or self.s >= P or self.v < 27 or self.v > 28 \
or self.r == 0 or self.s == 0:
raise InvalidSignature()
rlpdata = rlp.encode(self, self.__class__.exclude(['v', 'r', 's']))
rawhash = sha3(rlpdata)
pk = PublicKey(flags=ALL_FLAGS)
try:
pk.public_key = pk.ecdsa_recover(
rawhash,
pk.ecdsa_recoverable_deserialize(
zpad(
"".join(
chr(c)
for c in int_to_32bytearray(self.r)), 32) +
zpad(
"".join(
chr(c)
for c in int_to_32bytearray(self.s)), 32),
self.v - 27),
raw=True)
pub = pk.serialize(compressed=False)
except Exception:
raise InvalidSignature()
if pub[1:] == "\x00" * 32:
raise InvalidSignature()
pub = encode_pubkey(pub, 'bin')
return sha3(pub[1:])[-20:]
def sender(self):
if not self._sender:
# Determine sender
if self.v:
if self.r >= N or self.s >= N or self.v < 27 or self.v > 28 \
or self.r == 0 or self.s == 0:
raise InvalidTransaction("Invalid signature values!")
log.debug('recovering sender')
rlpdata = rlp.encode(self, UnsignedTransaction)
rawhash = utils.sha3(rlpdata)
pk = PublicKey(flags=ALL_FLAGS)
try:
pk.public_key = pk.ecdsa_recover(
rawhash,
pk.ecdsa_recoverable_deserialize(
zpad(utils.bytearray_to_bytestr(int_to_32bytearray(self.r)), 32) + zpad(utils.bytearray_to_bytestr(int_to_32bytearray(self.s)), 32),
self.v - 27
),
raw=True
)
pub = pk.serialize(compressed=False)
except Exception:
raise InvalidTransaction("Invalid signature values (x^3+7 is non-residue)")
if pub[1:] == b"\x00" * 32:
raise InvalidTransaction("Invalid signature (zero privkey cannot sign)")
pub = encode_pubkey(pub, 'bin')
self._sender = utils.sha3(pub[1:])[-20:]
assert self.sender == self._sender
else:
self._sender = 0
return self._sender
def handlePacket(self, data, addr):
# print("received message[" + str(addr) + "]")
msg_hash = data[:32] # 32 Byte Hash
raw_sig = data[32:97] # 64 Byte + 1 Byte Signature
ptype = data[97] # 1 Byte packet_type
pdata = data[98:] # Rest is rlp-encoded data
decdata = rlp.decode(pdata)
signedData = data[97:]
# Verify hash
if msg_hash != keccak256(data[32:]):
print("Invalid message hash!")
exit(0)
# Verify signature
deserialized_sig = self.priv_key.ecdsa_recoverable_deserialize(
raw_sig[:64], raw_sig[64])
remote_pubkey = self.priv_key.ecdsa_recover(keccak256(signedData),
deserialized_sig,
raw=True)
pub = PublicKey()
pub.public_key = remote_pubkey
verified = pub.ecdsa_verify(
keccak256(signedData),
pub.ecdsa_recoverable_convert(deserialized_sig),
raw=True)
if not verified:
print("Signature invalid!")
exit(0)
else:
print("Public Key: " + pub.serialize().hex())
packet_type = bytes([ptype])
if packet_type == PingPacket.packet_type:
print("Got ping.")
recv_ping = PingPacket.unpack(rlp.decode(pdata))
print(str(recv_ping))
# self.pong(msg_hash, recv_ping.To())
# TODO: Find out the correct endpoint
self.pong(self.theirEndpoint, msg_hash)
if packet_type == PongPacket.packet_type:
print("Got pong.")
recv_pong = PongPacket.unpack(decdata)
print(str(recv_pong))
# self.ping(self.theirEndpoint)
if packet_type == FindNodePacket.packet_type:
print("Got FindNodePacket.")
recv_findnode = FindNodePacket.unpack(rlp.decode(pdata))
target = recv_findnode.target
print("Target: " + str(target.hex()))
self.neighbors(self.theirEndpoint, target)
if packet_type == NeighborsPacket.packet_type:
print("Got NeighborsPacket.")
recv_neighbors = NeighborsPacket.unpack(rlp.decode(pdata))
print("# Neighbors: " + str(len(recv_neighbors.neighbors)))
def valid(self):
"""Check if this object is valid or not"""
if not self.signature:
return False
assert isinstance(self.signature, bytes)
assert 70 <= len(self.signature) <= 71
assert isinstance(self.user_public_key, bytes)
assert len(self.user_public_key) == 33
assert isinstance(self.user_address, str)
assert re.match(r'^(?:0[xX])?[0-9a-fA-F]{40}$', self.user_address)
public_key = PublicKey(self.user_public_key, raw=True)
verified = public_key.ecdsa_verify(
self.serialize(include_signature=False),
public_key.ecdsa_deserialize(self.signature))
if not verified:
return False
if get_address(public_key) != self.user_address:
return False
return self.id == self.hash
def verify_signature(self, origin_data: bytes, signature: bytes, is_hash: bool):
try:
origin_signature, recover_code = signature[:-1], signature[-1]
recoverable_sig = self._pri.ecdsa_recoverable_deserialize(origin_signature, recover_code)
pub = self._pri.ecdsa_recover(origin_data,
recover_sig=recoverable_sig,
raw=is_hash,
digest=hashlib.sha3_256)
extract_pub = PublicKey(pub, ctx=self._base.ctx).serialize(compressed=False)
return self.verify_address(extract_pub)
except Exception as e:
raise RuntimeError(f"signature verification fail : {origin_data} {signature}\n"
f"{e}")
def __init__(self):
self.priv_key = PrivateKey()
self.pub_key = PublicKey(pubkey=None, raw=False, flags=secp256k1.ALL_FLAGS)
break
textToSign += data + "\n"
dongle = getDongle(True)
publicKey = dongle.exchange(bytes("8004000000".decode('hex')))
print "publicKey " + str(publicKey).encode('hex')
try:
offset = 0
while offset <> len(textToSign):
if (len(textToSign) - offset) > 255:
chunk = textToSign[offset : offset + 255]
else:
chunk = textToSign[offset:]
if (offset + len(chunk)) == len(textToSign):
p1 = 0x80
else:
p1 = 0x00
apdu = bytes("8002".decode('hex')) + chr(p1) + chr(0x00) + chr(len(chunk)) + bytes(chunk)
signature = dongle.exchange(apdu)
offset += len(chunk)
print "signature " + str(signature).encode('hex')
publicKey = PublicKey(bytes(publicKey), raw=True)
signature = publicKey.ecdsa_deserialize(bytes(signature))
print "verified " + str(publicKey.ecdsa_verify(bytes(textToSign), signature))
except CommException as comm:
if comm.sw == 0x6985:
print "Aborted by user"
else:
print "Invalid status " + comm.sw