def create_challenge(self, secret: Union[bytes, str, bytearray],
token: int):
secret_hash: int = crypto.hash_numeric(secret)
y: int = pow(self._g0, secret_hash, self._ecc.d)
r: int = convert.point_to_int(crypto.get_random_point(self._curve))
t: int = pow(self._g0, r, self._ecc.d)
payload = b''.join(map(convert.int_to_bytes, (y, t, token)))
c = crypto.hash_numeric(payload)
z = r - (secret_hash * c)
return ZKChallenge(params=self.params, token=token, c=c, z=z)
def prove_challenge(self, challenge: ZKChallenge, signature: ZKSignature,
token: int):
t = pow(signature.signature, challenge.c, self._ecc.d) * pow(
self._g0, challenge.z, self._ecc.d) % self._ecc.d
payload = b''.join(
map(convert.int_to_bytes, (signature.signature, t, token)))
return challenge.token == token and challenge.c == crypto.hash_numeric(
payload)
def create_signature(self, secret: Union[bytes, str, bytearray]):
signature = pow(self._g0, crypto.hash_numeric(secret), self._ecc.d)
return ZKSignature(params=self.params, signature=signature)
def hash(self, *values):
return hash_numeric(*[v for v in values if v is not None],
self.salt,
alg=self.params.alg) & self._mask