miio.py 文件源码

def AES_cbc_decrypt(token: bytes, ciphertext: bytes) -> bytes:
    """Decrypt cipher text with device token."""
    key, iv = key_iv(token)
    cipher = Cipher(algorithms.AES(key), modes.CBC(iv), backend=_backend)
    decryptor = cipher.decryptor()
    padded_plaintext = decryptor.update(bytes(ciphertext)) \
        + decryptor.finalize()
    unpadder = padding.PKCS7(128).unpadder()
    unpadded_plaintext = unpadder.update(padded_plaintext)
    unpadded_plaintext += unpadder.finalize()
    return unpadded_plaintext