crypto.py 文件源码

def master_key_from_seed(seed):
        """ Generates a master key from a provided seed.

        Args:
            seed (bytes or str): a string of bytes or a hex string

        Returns:
            HDPrivateKey: the master private key.
        """
        S = get_bytes(seed)
        I = hmac.new(b"Bitcoin seed", S, hashlib.sha512).digest()
        Il, Ir = I[:32], I[32:]
        parse_Il = int.from_bytes(Il, 'big')
        if parse_Il == 0 or parse_Il >= bitcoin_curve.n:
            raise ValueError("Bad seed, resulting in invalid key!")

        return HDPrivateKey(key=parse_Il, chain_code=Ir, index=0, depth=0)