def pack(data: TLObject) -> bytes:
return (
bytes(8)
+ Long(MsgId())
+ Int(len(data.write()))
+ data.write()
)
def pack(message: Message, salt: int, session_id: bytes, auth_key: bytes, auth_key_id: bytes) -> bytes:
data = Long(salt) + session_id + message.write()
padding = urandom(-(len(data) + 12) % 16 + 12)
# 88 = 88 + 0 (outgoing message)
msg_key_large = sha256(auth_key[88: 88 + 32] + data + padding).digest()
msg_key = msg_key_large[8:24]
aes_key, aes_iv = kdf(auth_key, msg_key, True)
return auth_key_id + msg_key + aes.ige256_encrypt(data + padding, aes_key, aes_iv)