def verifyVote(self, privateKey):
if (self.signature == "" or len(self.signature) == 0):
return False
r, s = ecdsa.sign(self.voteHash,
privateKey,
curve=curve.secp256k1,
hashfunc=hl.sha256)
decoded_r, decoded_s = DEREncoder.decode_signature(self.signature)
# Se os parâmetros são diferentes, a assinatura é inválida
if (r != decoded_r or s != decoded_s):
return False
# Verifica a assinatura
valid = ecdsa.verify((r, s),
self.voteHash,
self.voter,
curve=curve.secp256k1,
hashfunc=hl.sha256)
if (not valid):
return False
return True
def fast_ecdsa(count, loop):
private_key = keys.gen_private_key(curve.P256)
public_key = keys.get_public_key(private_key, curve.P256)
# standard signature, returns two integers
with open("message.txt", "rb") as f:
m = f.read()
time_list_sign = []
for l in range(loop):
start = time.time()
for c in range(count):
r, s = ecdsa.sign(m, private_key)
end = time.time() - start
# print("["+str(l)+"th fast_ecdsa:sign second is "+ str(end) + "/"+str(count)+" signature")
time_list_sign.append(end)
ave_sign = numpy.mean(numpy.array(time_list_sign))
time_list_vrfy = []
for l in range(loop):
start = time.time()
for c in range(count):
valid = ecdsa.verify((r, s), m, public_key)
end = time.time() - start
# print("["+str(l)+"th fast_ecdsa:vrfy second is "+ str(end) + "/"+str(count)+" signature")
time_list_vrfy.append(end)
ave_vrfy = numpy.mean(numpy.array(time_list_vrfy))
print("fast_ecdsa:sign average second is " + str(ave_sign) + "/" +
str(count) + " signature")
print("fast_ecdsa:vrfy average second is " + str(ave_vrfy) + "/" +
str(count) + " signature")
return time_list_sign, time_list_vrfy
def signdata(priv=None, wif=None, data=None):
def priv2pemlong(priv):
skey = ecdsa.SigningKey.from_string(priv, curve=ecdsa.SECP256k1)
skey = skey.to_pem()
d = b("").join([
l.strip() for l in skey.split(b("\n"))
if l and not l.startswith(b("-----"))
])
raw_data = binascii.a2b_base64(d)
p, Q = fasn1.decode_key(raw_data)
return p
assert data is not None, "no data given!"
pk = b(priv) if isinstance(priv, str) else priv
wiff = b(wif) if isinstance(wif, str) else wif
if pk == None:
assert wiff is not None, "no keys given!"
privkey = _wif2priv(wiff)
else:
privkey = binascii.unhexlify(pk)
s = priv2pemlong(privkey)
order = 'FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFE BAAEDCE6 AF48A03B BFD25E8C D0364141'
(r, s) = fecdsa.sign(data, s, fcurve.secp256k1)
signed = ecdsa.util.sigencode_der(r, s, order)
return str(binascii.hexlify(signed), 'ascii')
def export_recovery_seed(self, allow_algs):
for alg in allow_algs:
if alg == 0:
if self._recovery_seed_pri_key is None:
self._initialize_recovery_seed()
S = fastecdsa.keys.get_public_key(self._recovery_seed_pri_key, P256)
S_enc = encode_pub(S)
signed_data = struct.pack('>B16s65s', alg, self._aaguid, S_enc)
sig = DEREncoder.encode_signature(
*ecdsa.sign(
signed_data,
self._attestation_key,
hashfunc=hashlib.sha256
)
)
payload = {
1: alg,
2: [],
3: self._aaguid,
4: sig,
-1: S_enc,
}
return cbor.encode(payload)
raise UnknownKeyAgreementScheme(allow_algs)
def recordTimeECC(sizes, message):
""" This function documents the times taken to generate the
key, encrypt, and decrypt using the ECC cryptosystem
Inputs:
sizes: ECC key sizes
message: message to encrypt
Outputs:
keyTime, encryptTime, decryptTime: times taken to do task
"""
keyTime, encryptTime, decryptTime = [], [], []
for size in sizes:
print("Starting Size: ", size)
startK = time.time()
priv_key, pub_key = keys.gen_keypair(size)
endK = time.time()
keyTime.append((endK - startK))
startE = time.time()
(r, s) = ecdsa.sign(message, priv_key, size)
endE = time.time()
encryptTime.append((endE - startE))
startD = time.time()
ecdsa.verify((r, s), message, pub_key, size)
endD = time.time()
decryptTime.append((endD - startD))
return keyTime, encryptTime, decryptTime
def sign(s, message, sigfmt=None):
"signs `message` and returns a detached signature"
if sigfmt is None: sigfmt = s.SIGFMT
if s._key is None: return None
return s._sigencode(
fe_ecdsa.sign(message, s._key, curve=s.CURVE, hashfunc=s.HASH),
sigfmt)
def gen_transaction(self, sender: str, receiver: str, data: str):
'''
새로운 거래를 생성하는 함수
sender에서 receiver에게 물품(items)을 전달하는 과정을 Transaction이라고 정의한다.
1. 사용자는 거래에 들어갈 품목들을 선택한다.(items)
2. 사용자는 개인키로 전자서명을 생성한다.
3. Transaction에 공개키를 포함시킨다.
4. 생성된 Transaction을 P2P네트워크에 전파한다.
'''
ret_str = ""
if self.get_unique_node_count() >= 5 and self.miner_count >= 2:
digital_signature = ecdsa.sign(sender + receiver + data,
self.private_key)
new_transaction = self.Transaction(sender, receiver, data,
digital_signature,
self.public_key)
new_transaction.serialize()
jdata = json.dumps(new_transaction.__dict__)
jdata = json.loads(jdata)
jdata['Type'] = 'transaction'
new_transaction.deserialize()
self.transaction_pool.append(new_transaction.item_history)
self.sendAll(jdata)
return ret_str
else:
ret_str = "Failed to generate transaction: "
if self.get_unique_node_count() < 5:
ret_str += "'Too few users in network' "
if self.miner_count < 2:
ret_str += "'Too few miners in network'"
print(ret_str)
return ret_str
def sign(self, hash_):
"""
Signs a hash
"""
# sign 'hash_', returns two integers; 'curve' is the curve used to sign the message,
#'hashfunc' is the hash function used to compress the message
return ecdsa.sign(hash_, self.private_key, curve = curve.secp256k1, hashfunc = hashlib.sha256)
def test_sign(self):
with self.assertRaises(TypeError):
self.cryp.sign("Test")
self.cryp.private_key = self.private_key
r, s = ecdsa.sign("Test", self.private_key, curve=secp256k1)
self.assertEqual(self.cryp.sign("Test"), hex(r) + "," + hex(s))
def sign(self, message, generic=False):
"""
Sign a raw sequence of bytes
:param message: sequence of bytes, raw format or hexadecimal notation
:param generic: do not specify elliptic curve if set to True
:return: signature in base58 encoding
"""
message = scrub_input(message)
if not self.is_secret:
raise ValueError("Cannot sign without a secret key.")
# Ed25519
if self.curve == b"ed":
digest = pysodium.crypto_generichash(message)
signature = pysodium.crypto_sign_detached(digest, self._secret_key)
# Secp256k1
elif self.curve == b"sp":
pk = secp256k1.PrivateKey(self._secret_key)
signature = pk.ecdsa_serialize_compact(
pk.ecdsa_sign(message, digest=blake2b_32))
# P256
elif self.curve == b"p2":
r, s = sign(msg=message, d=bytes_to_int(self._secret_key), hashfunc=blake2b_32)
signature = int_to_bytes(r) + int_to_bytes(s)
else:
assert False
if generic:
prefix = b'sig'
else:
prefix = self.curve + b'sig'
return base58_encode(signature, prefix).decode()
def derivesk_authenticate(self, challenge, creds):
'''
Find a cred in creds that matches this authenticator's backup seed private key,
derive the private key, and sign the challenge with it.
'''
chosen_cred, pri_key = self.derivesk_find(creds)
sig = ecdsa.sign(challenge, pri_key, hashfunc=hashlib.sha256)
return chosen_cred, sig
def make_credential(self, challenge):
'''Abstraction of the basic WebAuthn registration operation.'''
cred = os.urandom(32)
pri, pub = fastecdsa.keys.gen_keypair(P256)
self._credentials[cred] = pri
sig = ecdsa.sign(challenge, pri, hashfunc=hashlib.sha256)
return pub, cred, sig
def sign(m):
#generate public key
private_key, public_key = gen_keypair(secp256k1)
#generate signature
r, s = ecdsa.sign(m, private_key, curve=secp256k1, hashfunc=sha256)
return (public_key, [r, s])
def sign(signing_key: SigningKey, message_digest_bytes: bytes) -> bytes:
r, s = ecdsa.sign(
message_digest_bytes.hex(),
signing_key,
curve=curve.secp256k1,
prehashed=True,
)
return DEREncoder.encode_signature(r, s)
def sign_msg(msg: str, priv_key: str) -> str:
'''
Given a message, and the private key,
return the signature (in hex). x, and y are joined
with 'x'
'''
r, s = ecdsa.sign(msg, int(priv_key, 16))
return '{:x}x{:x}'.format(r, s)
def mine():
priv_key, q = keys.import_key('./priv_key.key')
r, s = ecdsa.sign(m, priv_key, curve=curve.secp256k1)
files={'pub_key': open('./pub_key.pub','rb')}
values={'r': r, 's': s}
r = requests.post('http://localhost:5000/mine', files=files, data=values)
print(r.text)
def signVote(self, privateKey):
# Assina a cédula
r, s = ecdsa.sign(self.voteHash,
privateKey,
curve=curve.secp256k1,
hashfunc=hl.sha256)
# Transforma a assinatura para DER
self.signature = DEREncoder.encode_signature(r, s)
def sign(s, message):
"signs `message` and returns a signature"
if s._key is None: return None
sigr, sigs = fe_ecdsa.sign(message,
s._key,
curve=s.CURVE,
hashfunc=s.HASH)
sig = fe_der.DEREncoder.encode_signature(sigr, sigs)
return b64.b64encode(sig)
def sign(self, payload, user_id):
canonical_payload = json.dumps(payload,
sort_keys=True,
separators=(',', ':'))
private_key = self.keypairs[user_id]
r, s = ecdsa.sign(canonical_payload,
private_key,
curve=curve.secp256k1)
return {"r": hex(r)[2:], "s": hex(s)[2:]}
def sign(self, hash_):
"""
Signs a hash
"""
# sign 'hash_', returns a signature (<class 'tuple'>, contains 2 elements of <class 'int'>);
# parameters: 'curve' is the curve used to sign the message,
# 'hashfunc' is the hash function used to compress the message
signature = ecdsa.sign(hash_, self.private_key, curve = curve.secp256k1, hashfunc = hashlib.sha256)
return signature
def sign(msg, private_key):
#msg = "a message to sign via ECDSA" # some message
# standard signature, returns two integers
private_key = decode_privkey(private_key)
r, s = ecdsa.sign(msg, private_key, hashfunc=hashlib.sha256, curve=curve.secp256k1)
#encoding to pack the r and s components into single byte stream
rb, sb = encode(r, 256), encode(s, 256)
signature = base64.b64encode(b'\x00'*(32-len(rb))+rb+b'\x00'*(32-len(sb))+sb)
return signature
def test_ecdsa_P256_SHA224_sign(self):
d = 0xC9AFA9D845BA75166B5C215767B1D6934E50C3DB36E89B127B8A622B120F6721
expected = (
0x53B2FFF5D1752B2C689DF257C04C40A587FABABB3F6FC2702F1343AF7CA9AA3F,
0xB9AFB64FDC03DC1A131C7D2386D11E349F070AA432A4ACC918BEA988BF75C74C)
sig = sign('sample', d, curve=P256, hashfunc=sha224)
self.assertEqual(sig, expected)
Q = d * P256.G
self.assertTrue(verify(sig, 'sample', Q, curve=P256, hashfunc=sha224))
def test_ecdsa_P256_SHA2_sign(self):
d = 0xC9AFA9D845BA75166B5C215767B1D6934E50C3DB36E89B127B8A622B120F6721
expected = (
0xEFD48B2AACB6A8FD1140DD9CD45E81D69D2C877B56AAF991C34D0EA84EAF3716,
0xF7CB1C942D657C41D436C7A1B6E29F65F3E900DBB9AFF4064DC4AB2F843ACDA8)
sig = sign('sample', d, curve=P256, hashfunc=sha256)
self.assertEqual(sig, expected)
Q = d * P256.G
self.assertTrue(verify(sig, 'sample', Q, curve=P256, hashfunc=sha256))
def test_ecdsa_P256_SHA384_sign(self):
d = 0xC9AFA9D845BA75166B5C215767B1D6934E50C3DB36E89B127B8A622B120F6721
expected = (
0x0EAFEA039B20E9B42309FB1D89E213057CBF973DC0CFC8F129EDDDC800EF7719,
0x4861F0491E6998B9455193E34E7B0D284DDD7149A74B95B9261F13ABDE940954)
sig = sign('sample', d, curve=P256, hashfunc=sha384)
self.assertEqual(sig, expected)
Q = d * P256.G
self.assertTrue(verify(sig, 'sample', Q, curve=P256, hashfunc=sha384))
def make_cert(client_public):
msg = (pack('<LL', 0x17, 0x20) +
unhexlify('%064x' % client_public.x)[::-1] + (b'\0' * 0x24) +
unhexlify('%064x' % client_public.y)[::-1] + (b'\0' * 0x4c))
s = sign(msg, hs_key())
s = DEREncoder().encode_signature(s[0], s[1])
s = pack('<L', len(s)) + s
msg = msg + s
msg += b'\0' * (444 - len(msg)) # FIXME not sure this math is right
return msg
def test_ecdsa_P256_SHA512_sign(self):
d = 0xC9AFA9D845BA75166B5C215767B1D6934E50C3DB36E89B127B8A622B120F6721
expected = (
0x8496A60B5E9B47C825488827E0495B0E3FA109EC4568FD3F8D1097678EB97F00,
0x2362AB1ADBE2B8ADF9CB9EDAB740EA6049C028114F2460F96554F61FAE3302FE)
sig = sign('sample', d, curve=P256, hashfunc=sha512)
self.assertEqual(sig, expected)
Q = d * P256.G
self.assertTrue(verify(sig, 'sample', Q, curve=P256, hashfunc=sha512))
def signNonce(file, m):
private_key, _ = keys.import_key(file)
print("private key: ", private_key)
# standard signature, returns two integers
r, s = ecdsa.sign(m, private_key)
# should return True as the signature we just generated is valid.
print("r: ", r)
print("s: ", s)
return r, s
def digital_signature(curve, message):
sk, pk = keys.gen_keypair(curve)
# hash message and sign
r, s = ecdsa.sign(message, sk, hashfunc=sha256)
# verify signature
valid = ecdsa.verify((r, s), message, pk, hashfunc=sha256)
return valid
def test_verify_signature(self):
self.cryp.generate_keys()
signature_fastecda = ecdsa.sign("Test", self.private_key, curve=secp256k1)
signature_cryp1 = Cryp.get_signature("Test", self.private_key)
signature_cryp2 = Cryp.get_signature("Tests", self.cryp.private_key)
self.assertEqual(signature_fastecda, tuple(map(lambda sig: int(sig, 0), signature_cryp1.split(','))))
self.assertTrue(Cryp.verify_signature(self.public_key, signature_cryp1, "Test"))
self.assertFalse(Cryp.verify_signature(self.public_key, signature_cryp1, "Tests"))
self.assertFalse(Cryp.verify_signature(self.cryp.public_key, signature_cryp1, "Test"))
self.assertFalse(Cryp.verify_signature(self.public_key, signature_cryp2, "Test"))
def sign_message_bytes(byts, rel_data_bytes, pk):
"""
Return tuple of strings.
"""
bytes_to_sign = None
if rel_data_bytes is not None:
bytes_to_sign = byts + rel_data_bytes
else:
bytes_to_sign = byts
r, s = ecdsa.sign(bytes_to_sign, pk, hashfunc=sha256, curve=curve.P256)
return str(r), str(s)
