89 lines
2.8 KiB
Python
89 lines
2.8 KiB
Python
# Pyrogram - Telegram MTProto API Client Library for Python
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# Copyright (C) 2017-2021 Dan <https://github.com/delivrance>
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#
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# This file is part of Pyrogram.
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#
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# Pyrogram is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Lesser General Public License as published
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# by the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# Pyrogram is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public License
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# along with Pyrogram. If not, see <http://www.gnu.org/licenses/>.
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import logging
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import os
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from typing import Optional
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from pyrogram import utils
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from pyrogram.crypto import aes
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from .tcp import TCP
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log = logging.getLogger(__name__)
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class TCPAbridgedO(TCP):
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RESERVED = (b"HEAD", b"POST", b"GET ", b"OPTI", b"\xee" * 4)
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def __init__(self, ipv6: bool, proxy: dict):
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super().__init__(ipv6, proxy)
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self.encrypt = None
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self.decrypt = None
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async def connect(self, address: tuple):
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await super().connect(address)
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while True:
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nonce = bytearray(os.urandom(64))
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if nonce[0] != b"\xef" and nonce[:4] not in self.RESERVED and nonce[4:4] != b"\x00" * 4:
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nonce[56] = nonce[57] = nonce[58] = nonce[59] = 0xef
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break
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temp = bytearray(nonce[55:7:-1])
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self.encrypt = (nonce[8:40], nonce[40:56], bytearray(1))
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self.decrypt = (temp[0:32], temp[32:48], bytearray(1))
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nonce[56:64] = aes.ctr256_encrypt(nonce, *self.encrypt)[56:64]
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await super().send(nonce)
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async def send(self, data: bytes, *args):
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length = len(data) // 4
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data = (bytes([length]) if length <= 126 else b"\x7f" + length.to_bytes(3, "little")) + data
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payload = await utils.maybe_run_in_executor(aes.ctr256_encrypt, data, len(data), self.loop, *self.encrypt)
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await super().send(payload)
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async def recv(self, length: int = 0) -> Optional[bytes]:
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length = await super().recv(1)
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if length is None:
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return None
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length = aes.ctr256_decrypt(length, *self.decrypt)
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if length == b"\x7f":
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length = await super().recv(3)
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if length is None:
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return None
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length = aes.ctr256_decrypt(length, *self.decrypt)
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data = await super().recv(int.from_bytes(length, "little") * 4)
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if data is None:
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return None
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return await utils.maybe_run_in_executor(aes.ctr256_decrypt, data, len(data), self.loop, *self.decrypt)
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