powers.py 文件源码

def _encrypt_key(
            self,
            key: bytes,
            pubkey: bytes = None
    ) -> Tuple[bytes, bytes]:
        """
        Encrypts the `key` provided for the provided `pubkey` using the ECIES
        schema. If no `pubkey` is provided, it uses `self.pub_key`.

        :param key: Key to encrypt
        :param pubkey: Public Key to encrypt the `key` for

        :return (encrypted key, encapsulated ECIES key)
        """
        pubkey = pubkey or self.pub_key

        symm_key, enc_symm_key = API.ecies_encaspulate(pubkey)
        enc_key = API.symm_encrypt(symm_key, key)
        return (enc_key, enc_symm_key)