encrypting_keypair.py 文件源码

def encrypt(self,
                data: bytes,
                pubkey: bytes = None) -> Tuple[bytes, bytes]:
        """
        :data:      The data to encrypt. If derived per-subpath, it's a
                    symmetric key to use for block ciphers.
        :pubkey:    Optional public key to encrypt for. If not given, encrypt
                    for ours

        :returns:   (ekey, edata) where ekey is needed for recepient to
                    reconstruct a DH secret, edata is data encrypted with this
                    DH secret. The output should be treated as a monolithic
                    ciphertext outside of this class
        """
        if pubkey is None:
            pubkey = self._pub_key
        else:
            pubkey = ec.deserialize(self.pre.ecgroup, pubkey)

        key, ekey = self.pre.encapsulate(pubkey)
        cipher = SecretBox(key)

        return ((ec.serialize(ekey.ekey), None),
                cipher.encrypt(data))