crypto.py 文件源码

def decrypt(self, ciphertext: bytes):
        lenciphersymkey, = struct.unpack(">I", ciphertext[:4])
        ciphersymkey = ciphertext[4:4 + lenciphersymkey]
        ciphertext = ciphertext[4 + lenciphersymkey:]

        symkey = load_sym_key(self._hazmat_private_key.decrypt(
            ciphersymkey,
            padding.OAEP(
                mgf=padding.MGF1(algorithm=hashes.SHA256()),
                algorithm=hashes.SHA256(),
                label=None
            )
        ))
        return symkey.decrypt(ciphertext)