mirror of
https://github.com/LonamiWebs/Telethon.git
synced 2024-11-14 13:36:43 +03:00
52 lines
1.8 KiB
Python
52 lines
1.8 KiB
Python
import os
|
|
|
|
from .tcpabridged import ConnectionTcpAbridged
|
|
from ...crypto import AESModeCTR
|
|
|
|
|
|
class ConnectionTcpObfuscated(ConnectionTcpAbridged):
|
|
"""
|
|
Encodes the packet just like `ConnectionTcpAbridged`, but encrypts
|
|
every message with a randomly generated key using the
|
|
AES-CTR mode so the packets are harder to discern.
|
|
"""
|
|
def __init__(self, ip, port, *, loop, loggers, proxy=None):
|
|
super().__init__(ip, port, loop=loop, loggers=loggers, proxy=proxy)
|
|
self._aes_encrypt = None
|
|
self._aes_decrypt = None
|
|
|
|
def _write(self, data):
|
|
self._writer.write(self._aes_encrypt.encrypt(data))
|
|
|
|
async def _read(self, n):
|
|
return self._aes_decrypt.encrypt(await self._reader.readexactly(n))
|
|
|
|
async def connect(self, timeout=None, ssl=None):
|
|
await super().connect(timeout=timeout, ssl=ssl)
|
|
|
|
# Obfuscated messages secrets cannot start with any of these
|
|
keywords = (b'PVrG', b'GET ', b'POST', b'\xee\xee\xee\xee')
|
|
while True:
|
|
random = os.urandom(64)
|
|
if (random[0] != b'\xef' and
|
|
random[:4] not in keywords and
|
|
random[4:4] != b'\0\0\0\0'):
|
|
break
|
|
|
|
random = bytearray(random)
|
|
random[56] = random[57] = random[58] = random[59] = 0xef
|
|
random_reversed = random[55:7:-1] # Reversed (8, len=48)
|
|
|
|
# Encryption has "continuous buffer" enabled
|
|
encrypt_key = bytes(random[8:40])
|
|
encrypt_iv = bytes(random[40:56])
|
|
decrypt_key = bytes(random_reversed[:32])
|
|
decrypt_iv = bytes(random_reversed[32:48])
|
|
|
|
self._aes_encrypt = AESModeCTR(encrypt_key, encrypt_iv)
|
|
self._aes_decrypt = AESModeCTR(decrypt_key, decrypt_iv)
|
|
|
|
random[56:64] = self._aes_encrypt.encrypt(bytes(random))[56:64]
|
|
self._writer.write(random)
|
|
await self._writer.drain()
|