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ecc: (minor) use ECPubkey.from_point

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SomberNight 2018-05-27 03:55:10 +02:00
parent 25089aa9c2
commit facb7bbc0e
No known key found for this signature in database
GPG key ID: B33B5F232C6271E9
1 changed files with 2 additions and 2 deletions
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4
lib/ecc.py
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@ -179,7 +179,7 @@ class ECPubkey(object):
raise ValueError('recid is {}, but should be 0 <= recid <= 3'.format(recid))
ecdsa_verifying_key = _MyVerifyingKey.from_signature(sig_string, recid, msg_hash, curve=SECP256k1)
ecdsa_point = ecdsa_verifying_key.pubkey.point
return ECPubkey(point_to_ser(ecdsa_point))
return ECPubkey.from_point(ecdsa_point)
@classmethod
def from_signature65(cls, sig: bytes, msg_hash: bytes):
@ -396,7 +396,7 @@ class ECPrivkey(ECPubkey):
raise Exception('invalid ciphertext: invalid ephemeral pubkey') from e
if not ecdsa.ecdsa.point_is_valid(generator_secp256k1, ecdsa_point.x(), ecdsa_point.y()):
raise Exception('invalid ciphertext: invalid ephemeral pubkey')
ephemeral_pubkey = ECPubkey(point_to_ser(ecdsa_point))
ephemeral_pubkey = ECPubkey.from_point(ecdsa_point)
ecdh_key = (ephemeral_pubkey * self.secret_scalar).get_public_key_bytes(compressed=True)
key = hashlib.sha512(ecdh_key).digest()
iv, key_e, key_m = key[0:16], key[16:32], key[32:]