def verify(cls, cpubkey, signature, message):
'''refer:https://github.com/cityofzion/neo-python/neo/Cryptography/Crypto.py'''
bitcoin.change_curve(
int("FFFFFFFF00000001000000000000000000000000FFFFFFFFFFFFFFFFFFFFFFFF", 16),
int("FFFFFFFF00000000FFFFFFFFFFFFFFFFBCE6FAADA7179E84F3B9CAC2FC632551", 16),
int("FFFFFFFF00000001000000000000000000000000FFFFFFFFFFFFFFFFFFFFFFFC", 16),
int("5AC635D8AA3A93E7B3EBBD55769886BC651D06B0CC53B0F63BCE3C3E27D2604B", 16),
int("6B17D1F2E12C4247F8BCE6E563A440F277037D812DEB33A0F4A13945D898C296", 16),
int("4FE342E2FE1A7F9B8EE7EB4A7C0F9E162BCE33576B315ECECBB6406837BF51F5", 16)
)
try:
pubkey = cls.uncompress_pubkey(cpubkey)
pubkey = binascii.unhexlify(pubkey)[1:]
except Exception as e:
return False,'wrong publickey'
try:
m = binascii.unhexlify(message)
except Exception as e:
return False,"wrong transaction"
try:
s = binascii.unhexlify(signature)
except Exception as e:
return False,'wrong signature'
try:
vk = VerifyingKey.from_string(pubkey, curve=NIST256p, hashfunc=hashlib.sha256)
res = vk.verify(s, m, hashfunc=hashlib.sha256)
return res,''
except Exception as e:
print('verify failth:%s' % e)
return False,'failth'
def __init__(self, private_key: bytes):
self.private_key = private_key
self.public_key = None
bitcoin.change_curve(
115792089210356248762697446949407573530086143415290314195533631308867097853951,
115792089210356248762697446949407573529996955224135760342422259061068512044369,
115792089210356248762697446949407573530086143415290314195533631308867097853948,
41058363725152142129326129780047268409114441015993725554835256314039467401291,
48439561293906451759052585252797914202762949526041747995844080717082404635286,
36134250956749795798585127919587881956611106672985015071877198253568414405109
)
length = len(self.private_key)
if length != 32:
raise ValueError("Invalid private key")
if length == 32:
try:
pubkey_encoded_not_compressed = bitcoin.privkey_to_pubkey(
private_key)
pubkey_points = bitcoin.decode_pubkey(
pubkey_encoded_not_compressed, 'bin')
pubx = pubkey_points[0]
puby = pubkey_points[1]
self.public_key = cryptography.ECDSA.secp256r1().Curve.point(
pubx, puby)
except Exception:
raise ValueError("Could not determine public key")
def setup_curve(self):
bitcoin.change_curve(
115792089210356248762697446949407573530086143415290314195533631308867097853951,
115792089210356248762697446949407573529996955224135760342422259061068512044369,
115792089210356248762697446949407573530086143415290314195533631308867097853948,
41058363725152142129326129780047268409114441015993725554835256314039467401291,
48439561293906451759052585252797914202762949526041747995844080717082404635286,
36134250956749795798585127919587881956611106672985015071877198253568414405109
)
def reset_curve_to_eth():
# this is standart btc/eth params for curve
# this function reset it because 1) this params is global in bitcoin-1.1.42 lib and 2) this params are changing in neo KeyPair init
P = 2**256 - 2**32 - 977
N = 115792089237316195423570985008687907852837564279074904382605163141518161494337
A = 0
B = 7
Gx = 55066263022277343669578718895168534326250603453777594175500187360389116729240
Gy = 32670510020758816978083085130507043184471273380659243275938904335757337482424
bitcoin.change_curve(P, N, A, B, Gx, Gy)
def SetupSignatureCurve():
"""
Setup the Elliptic curve parameters.
"""
bitcoin.change_curve(
int("FFFFFFFF00000001000000000000000000000000FFFFFFFFFFFFFFFFFFFFFFFF", 16),
int("FFFFFFFF00000000FFFFFFFFFFFFFFFFBCE6FAADA7179E84F3B9CAC2FC632551", 16),
int("FFFFFFFF00000001000000000000000000000000FFFFFFFFFFFFFFFFFFFFFFFC", 16),
int("5AC635D8AA3A93E7B3EBBD55769886BC651D06B0CC53B0F63BCE3C3E27D2604B", 16),
int("6B17D1F2E12C4247F8BCE6E563A440F277037D812DEB33A0F4A13945D898C296", 16),
int("4FE342E2FE1A7F9B8EE7EB4A7C0F9E162BCE33576B315ECECBB6406837BF51F5", 16)
)
def setup_curve(self):
# bitcoin.change_curve(
# int("FFFFFFFF00000001000000000000000000000000FFFFFFFFFFFFFFFFFFFFFFFF", 16),
# int("FFFFFFFF00000000FFFFFFFFFFFFFFFFBCE6FAADA7179E84F3B9CAC2FC632551", 16),
# int("FFFFFFFF00000001000000000000000000000000FFFFFFFFFFFFFFFFFFFFFFFC", 16),
# int("5AC635D8AA3A93E7B3EBBD55769886BC651D06B0CC53B0F63BCE3C3E27D2604B", 16),
# int("6B17D1F2E12C4247F8BCE6E563A440F277037D812DEB33A0F4A13945D898C296", 16),
# int("4FE342E2FE1A7F9B8EE7EB4A7C0F9E162BCE33576B315ECECBB6406837BF51F5", 16)
# )
bitcoin.change_curve(
115792089210356248762697446949407573530086143415290314195533631308867097853951,
115792089210356248762697446949407573529996955224135760342422259061068512044369,
115792089210356248762697446949407573530086143415290314195533631308867097853948,
41058363725152142129326129780047268409114441015993725554835256314039467401291,
48439561293906451759052585252797914202762949526041747995844080717082404635286,
36134250956749795798585127919587881956611106672985015071877198253568414405109
)
#!/usr/bin/env python
from bitcoin import change_curve, fast_add, fast_multiply, inv
import random
# define a 16-bits curve (not secure)
P = 10177
A = 1
B = P-1
G = (1,1)
N = 10331
change_curve(P, N, A, B, G[0], G[1])
# generate private and public key
k = random.randint(1, N)
Q = fast_multiply(G, k)
print("SEARCH - {0}".format(k))
# Pollard rho
def new_xab(x, a, b):
S = x[0] % 3
if S == 0:
a = (a + 1) % N
x = fast_add(x, G)
elif S == 1:
a = (a * 2) % N
b = (b * 2) % N
x = fast_add(x, x)
elif S == 2:
b = (b + 1) % N
x = fast_add(x, Q)
def setUp(self):
import bitcoin
# reset Elliptic curve parameters to secp256k1
bitcoin.change_curve(bitcoin.P, bitcoin.N, bitcoin.A, bitcoin.B,
bitcoin.Gx, bitcoin.Gy)