lbrycrd.py 文件源码

def _CKD_pub(cK, c, s):
    order = generator_secp256k1.order()
    I = hmac.new(c, cK + s, hashlib.sha512).digest()
    curve = SECP256k1
    pubkey_point = string_to_number(I[0:32]) * curve.generator + ser_to_point(cK)
    public_key = ecdsa.VerifyingKey.from_public_point(pubkey_point, curve=SECP256k1)
    c_n = I[32:]
    cK_n = GetPubKey(public_key.pubkey, True)
    return cK_n, c_n