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mtprotoproxy.py
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mtprotoproxy.py
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#!/usr/bin/env python3
import asyncio
import socket
import urllib.parse
import urllib.request
import collections
import time
import hashlib
import random
import binascii
import sys
try:
from Crypto.Cipher import AES
from Crypto.Util import Counter
def create_aes_ctr(key, iv):
ctr = Counter.new(128, initial_value=iv)
return AES.new(key, AES.MODE_CTR, counter=ctr)
def create_aes_cbc(key, iv):
return AES.new(key, AES.MODE_CBC, iv)
except ImportError:
print("Failed to find pycryptodome or pycrypto, using slow AES implementation",
flush=True, file=sys.stderr)
import pyaes
def create_aes_ctr(key, iv):
ctr = pyaes.Counter(iv)
return pyaes.AESModeOfOperationCTR(key, ctr)
def create_aes_cbc(key, iv):
class EncryptorAdapter:
def __init__(self, mode):
self.mode = mode
def encrypt(self, data):
encrypter = pyaes.Encrypter(self.mode, pyaes.PADDING_NONE)
return encrypter.feed(data) + encrypter.feed()
def decrypt(self, data):
decrypter = pyaes.Decrypter(self.mode, pyaes.PADDING_NONE)
return decrypter.feed(data) + decrypter.feed()
mode = pyaes.AESModeOfOperationCBC(key, iv)
return EncryptorAdapter(mode)
import config
PORT = getattr(config, "PORT")
USERS = getattr(config, "USERS")
# load advanced settings
PREFER_IPV6 = getattr(config, "PREFER_IPV6", socket.has_ipv6)
# disables tg->client trafic reencryption, faster but less secure
FAST_MODE = getattr(config, "FAST_MODE", True)
STATS_PRINT_PERIOD = getattr(config, "STATS_PRINT_PERIOD", 600)
READ_BUF_SIZE = getattr(config, "READ_BUF_SIZE", 4096)
AD_TAG = bytes.fromhex(getattr(config, "AD_TAG", ""))
TG_DATACENTER_PORT = 443
TG_DATACENTERS_V4 = [
"149.154.175.50", "149.154.167.51", "149.154.175.100",
"149.154.167.91", "149.154.171.5"
]
TG_DATACENTERS_V6 = [
"2001:b28:f23d:f001::a", "2001:67c:04e8:f002::a", "2001:b28:f23d:f003::a",
"2001:67c:04e8:f004::a", "2001:b28:f23f:f005::a"
]
TG_MIDDLE_PROXIES_V4 = [
("149.154.175.50", 8888), ("149.154.162.38", 80), ("149.154.175.100", 8888),
("91.108.4.136", 8888), ("91.108.56.181", 8888)
]
TG_MIDDLE_PROXIES_V6 = [
("2001:0b28:f23d:f001:0000:0000:0000:000d", 8888),
("2001:067c:04e8:f002:0000:0000:0000:000d", 80),
("2001:0b28:f23d:f003:0000:0000:0000:000d", 8888),
("2001:067c:04e8:f004:0000:0000:0000:000d", 8888),
("2001:0b28:f23f:f005:0000:0000:0000:000d", 8888)
]
USE_MIDDLE_PROXY = (len(AD_TAG) == 16)
PROXY_SECRET = bytes.fromhex(
"c4f9faca9678e6bb48ad6c7e2ce5c0d24430645d554addeb55419e034da62721" +
"d046eaab6e52ab14a95a443ecfb3463e79a05a66612adf9caeda8be9a80da698" +
"6fb0a6ff387af84d88ef3a6413713e5c3377f6e1a3d47d99f5e0c56eece8f05c" +
"54c490b079e31bef82ff0ee8f2b0a32756d249c5f21269816cb7061b265db212"
)
SKIP_LEN = 8
PREKEY_LEN = 32
KEY_LEN = 32
IV_LEN = 16
HANDSHAKE_LEN = 64
MAGIC_VAL_POS = 56
MAGIC_VAL_TO_CHECK = b'\xef\xef\xef\xef'
CBC_PADDING = 16
PADDING_FILLER = b"\x04\x00\x00\x00"
MIN_MSG_LEN = 12
MAX_MSG_LEN = 2 ** 24
my_ip_info = {"ipv4": None, "ipv6": None}
def print_err(*params):
print(*params, file=sys.stderr, flush=True)
def init_stats():
global stats
stats = {user: collections.Counter() for user in USERS}
def update_stats(user, connects=0, curr_connects_x2=0, octets=0):
global stats
if user not in stats:
stats[user] = collections.Counter()
stats[user].update(connects=connects, curr_connects_x2=curr_connects_x2,
octets=octets)
class LayeredStreamReaderBase:
def __init__(self, upstream):
self.upstream = upstream
async def read(self, n):
return await self.upstream.read(n)
async def readexactly(self, n):
return await self.upstream.readexactly(n)
class LayeredStreamWriterBase:
def __init__(self, upstream):
self.upstream = upstream
def write(self, data):
return self.upstream.write(data)
def write_eof(self):
return self.upstream.write_eof()
async def drain(self):
return await self.upstream.drain()
def close(self):
return self.upstream.close()
def abort(self):
return self.upstream.transport.abort()
@property
def transport(self):
return self.upstream.transport
class CryptoWrappedStreamReader(LayeredStreamReaderBase):
def __init__(self, upstream, decryptor, block_size=1):
self.upstream = upstream
self.decryptor = decryptor
self.block_size = block_size
self.buf = bytearray()
async def read(self, n):
if self.buf:
ret = bytes(self.buf)
self.buf.clear()
return ret
else:
data = await self.upstream.read(n)
if not data:
return b""
needed_till_full_block = -len(data) % self.block_size
if needed_till_full_block > 0:
data += self.upstream.readexactly(needed_till_full_block)
return self.decryptor.decrypt(data)
async def readexactly(self, n):
if n > len(self.buf):
to_read = n - len(self.buf)
needed_till_full_block = -to_read % self.block_size
to_read_block_aligned = to_read + needed_till_full_block
data = await self.upstream.readexactly(to_read_block_aligned)
self.buf += self.decryptor.decrypt(data)
ret = bytes(self.buf[:n])
self.buf = self.buf[n:]
return ret
class CryptoWrappedStreamWriter(LayeredStreamWriterBase):
def __init__(self, upstream, encryptor, block_size=1):
self.upstream = upstream
self.encryptor = encryptor
self.block_size = block_size
def write(self, data):
if len(data) % self.block_size != 0:
print_err("BUG: writing %d bytes not aligned to block size %d" % (
len(data), self.block_size))
return 0
q = self.encryptor.encrypt(data)
return self.upstream.write(q)
class MTProtoFrameStreamReader(LayeredStreamReaderBase):
def __init__(self, upstream, seq_no=0):
self.upstream = upstream
self.seq_no = seq_no
async def read(self, buf_size):
msg_len_bytes = await self.upstream.readexactly(4)
msg_len = int.from_bytes(msg_len_bytes, "little")
# skip paddings
while msg_len == 4:
msg_len_bytes = await self.upstream.readexactly(4)
msg_len = int.from_bytes(msg_len_bytes, "little")
len_is_bad = (msg_len % len(PADDING_FILLER) != 0)
if not MIN_MSG_LEN <= msg_len <= MAX_MSG_LEN or len_is_bad:
print_err("msg_len is bad, closing connection", msg_len)
return b""
msg_seq_bytes = await self.upstream.readexactly(4)
msg_seq = int.from_bytes(msg_seq_bytes, "little", signed=True)
if msg_seq != self.seq_no:
print_err("unexpected seq_no")
return b""
self.seq_no += 1
data = await self.upstream.readexactly(msg_len - 4 - 4 - 4)
checksum_bytes = await self.upstream.readexactly(4)
checksum = int.from_bytes(checksum_bytes, "little")
computed_checksum = binascii.crc32(msg_len_bytes + msg_seq_bytes + data)
if computed_checksum != checksum:
return b""
return data
class MTProtoFrameStreamWriter(LayeredStreamWriterBase):
def __init__(self, upstream, seq_no=0):
self.upstream = upstream
self.seq_no = seq_no
def write(self, msg):
len_bytes = int.to_bytes(len(msg) + 4 + 4 + 4, 4, "little")
seq_bytes = int.to_bytes(self.seq_no, 4, "little", signed=True)
self.seq_no += 1
msg_without_checksum = len_bytes + seq_bytes + msg
checksum = int.to_bytes(binascii.crc32(msg_without_checksum), 4, "little")
full_msg = msg_without_checksum + checksum
padding = PADDING_FILLER * ((-len(full_msg) % CBC_PADDING) // len(PADDING_FILLER))
return self.upstream.write(full_msg + padding)
class MTProtoCompactFrameStreamReader(LayeredStreamReaderBase):
async def read(self, buf_size):
msg_len_bytes = await self.upstream.readexactly(1)
msg_len = int.from_bytes(msg_len_bytes, "little")
if msg_len >= 0x80:
msg_len -= 0x80
if msg_len == 0x7f:
msg_len_bytes = await self.upstream.readexactly(3)
msg_len = int.from_bytes(msg_len_bytes, "little")
msg_len *= 4
data = await self.upstream.readexactly(msg_len)
return data
class MTProtoCompactFrameStreamWriter(LayeredStreamWriterBase):
def __init__(self, upstream, seq_no=0):
self.upstream = upstream
self.seq_no = seq_no
def write(self, data):
SMALL_PKT_BORDER = 0x7f
LARGE_PKT_BORGER = 256 ** 3
if len(data) % 4 != 0:
print_err("BUG: MTProtoFrameStreamWriter attempted to send msg with len %d" % len(msg))
return 0
len_div_four = len(data) // 4
if len_div_four < SMALL_PKT_BORDER:
return self.upstream.write(bytes([len_div_four]) + data)
elif len_div_four < LARGE_PKT_BORGER:
return self.upstream.write(b'\x7f' + bytes(int.to_bytes(len_div_four, 3, 'little')) +
data)
else:
print_err("Attempted to send too large pkt len =", len(data))
return 0
class ProxyReqStreamReader(LayeredStreamReaderBase):
async def read(self, msg):
RPC_PROXY_ANS = b"\x0d\xda\x03\x44"
RPC_CLOSE_EXT = b"\xa2\x34\xb6\x5e"
data = await self.upstream.read(1)
if len(data) < 4:
return b""
ans_type, ans_flags, conn_id, conn_data = data[:4], data[4:8], data[8:16], data[16:]
if ans_type == RPC_CLOSE_EXT:
return b""
if ans_type != RPC_PROXY_ANS:
print_err("ans_type != RPC_PROXY_ANS", ans_type)
return b""
return conn_data
class ProxyReqStreamWriter(LayeredStreamWriterBase):
def __init__(self, upstream, cl_ip, cl_port, my_ip, my_port):
self.upstream = upstream
if ":" not in cl_ip:
self.remote_ip_port = b"\x00" * 10 + b"\xff\xff"
self.remote_ip_port += socket.inet_pton(socket.AF_INET, cl_ip)
else:
self.remote_ip_port = socket.inet_pton(socket.AF_INET6, cl_ip)
self.remote_ip_port += int.to_bytes(cl_port, 4, "little")
if ":" not in my_ip:
self.our_ip_port = b"\x00" * 10 + b"\xff\xff"
self.our_ip_port += socket.inet_pton(socket.AF_INET, my_ip)
else:
self.our_ip_port = socket.inet_pton(socket.AF_INET6, my_ip)
self.our_ip_port += int.to_bytes(my_port, 4, "little")
self.out_conn_id = bytearray([random.randrange(0, 256) for i in range(8)])
def write(self, msg):
RPC_PROXY_REQ = b"\xee\xf1\xce\x36"
FLAGS = b"\x08\x10\x02\x40"
EXTRA_SIZE = b"\x18\x00\x00\x00"
PROXY_TAG = b"\xae\x26\x1e\xdb"
FOUR_BYTES_ALIGNER = b"\x00\x00\x00"
if len(msg) % 4 != 0:
print_err("BUG: attempted to send msg with len %d" % len(msg))
return 0
full_msg = bytearray()
full_msg += RPC_PROXY_REQ + FLAGS + self.out_conn_id + self.remote_ip_port
full_msg += self.our_ip_port + EXTRA_SIZE + PROXY_TAG
full_msg += bytes([len(AD_TAG)]) + AD_TAG + FOUR_BYTES_ALIGNER
full_msg += msg
return self.upstream.write(full_msg)
async def handle_handshake(reader, writer):
handshake = await reader.readexactly(HANDSHAKE_LEN)
for user in USERS:
secret = bytes.fromhex(USERS[user])
dec_prekey_and_iv = handshake[SKIP_LEN:SKIP_LEN+PREKEY_LEN+IV_LEN]
dec_prekey, dec_iv = dec_prekey_and_iv[:PREKEY_LEN], dec_prekey_and_iv[PREKEY_LEN:]
dec_key = hashlib.sha256(dec_prekey + secret).digest()
decryptor = create_aes_ctr(key=dec_key, iv=int.from_bytes(dec_iv, "big"))
enc_prekey_and_iv = handshake[SKIP_LEN:SKIP_LEN+PREKEY_LEN+IV_LEN][::-1]
enc_prekey, enc_iv = enc_prekey_and_iv[:PREKEY_LEN], enc_prekey_and_iv[PREKEY_LEN:]
enc_key = hashlib.sha256(enc_prekey + secret).digest()
encryptor = create_aes_ctr(key=enc_key, iv=int.from_bytes(enc_iv, "big"))
decrypted = decryptor.decrypt(handshake)
check_val = decrypted[MAGIC_VAL_POS:MAGIC_VAL_POS+4]
if check_val != MAGIC_VAL_TO_CHECK:
continue
dc_idx = abs(int.from_bytes(decrypted[60:62], "little", signed=True)) - 1
if dc_idx == 0:
continue
reader = CryptoWrappedStreamReader(reader, decryptor)
writer = CryptoWrappedStreamWriter(writer, encryptor)
return reader, writer, user, dc_idx, enc_key + enc_iv
return False
async def do_direct_handshake(dc_idx, dec_key_and_iv=None):
RESERVED_NONCE_FIRST_CHARS = [b"\xef"]
RESERVED_NONCE_BEGININGS = [b"\x48\x45\x41\x44", b"\x50\x4F\x53\x54",
b"\x47\x45\x54\x20", b"\xee\xee\xee\xee"]
RESERVED_NONCE_CONTINUES = [b"\x00\x00\x00\x00"]
if PREFER_IPV6:
if not 0 <= dc_idx < len(TG_DATACENTERS_V6):
return False
dc = TG_DATACENTERS_V6[dc_idx]
else:
if not 0 <= dc_idx < len(TG_DATACENTERS_V4):
return False
dc = TG_DATACENTERS_V4[dc_idx]
try:
reader_tgt, writer_tgt = await asyncio.open_connection(dc, TG_DATACENTER_PORT)
except ConnectionRefusedError as E:
print_err("Got connection refused while trying to connect to", dc, TG_DATACENTER_PORT)
return False
except OSError as E:
print_err("Unable to connect to", dc, TG_DATACENTER_PORT)
return False
while True:
rnd = bytearray([random.randrange(0, 256) for i in range(HANDSHAKE_LEN)])
if rnd[:1] in RESERVED_NONCE_FIRST_CHARS:
continue
if rnd[:4] in RESERVED_NONCE_BEGININGS:
continue
if rnd[4:8] in RESERVED_NONCE_CONTINUES:
continue
break
rnd[MAGIC_VAL_POS:MAGIC_VAL_POS+4] = MAGIC_VAL_TO_CHECK
if dec_key_and_iv:
rnd[SKIP_LEN:SKIP_LEN+KEY_LEN+IV_LEN] = dec_key_and_iv[::-1]
rnd = bytes(rnd)
dec_key_and_iv = rnd[SKIP_LEN:SKIP_LEN+KEY_LEN+IV_LEN][::-1]
dec_key, dec_iv = dec_key_and_iv[:KEY_LEN], dec_key_and_iv[KEY_LEN:]
decryptor = create_aes_ctr(key=dec_key, iv=int.from_bytes(dec_iv, "big"))
enc_key_and_iv = rnd[SKIP_LEN:SKIP_LEN+KEY_LEN+IV_LEN]
enc_key, enc_iv = enc_key_and_iv[:KEY_LEN], enc_key_and_iv[KEY_LEN:]
encryptor = create_aes_ctr(key=enc_key, iv=int.from_bytes(enc_iv, "big"))
rnd_enc = rnd[:MAGIC_VAL_POS] + encryptor.encrypt(rnd)[MAGIC_VAL_POS:]
writer_tgt.write(rnd_enc)
await writer_tgt.drain()
reader_tgt = CryptoWrappedStreamReader(reader_tgt, decryptor)
writer_tgt = CryptoWrappedStreamWriter(writer_tgt, encryptor)
return reader_tgt, writer_tgt
def get_middleproxy_aes_key_and_iv(nonce_srv, nonce_clt, clt_ts, srv_ip, clt_port, purpose,
clt_ip, srv_port, middleproxy_secret, clt_ipv6=None,
srv_ipv6=None):
EMPTY_IP = b"\x00\x00\x00\x00"
if not clt_ip or not srv_ip:
clt_ip = EMPTY_IP
srv_ip = EMPTY_IP
s = bytearray()
s += nonce_srv + nonce_clt + clt_ts + srv_ip + clt_port + purpose + clt_ip + srv_port
s += middleproxy_secret + nonce_srv
if clt_ipv6 and srv_ipv6:
s += clt_ipv6 + srv_ipv6
s += nonce_clt
md5_sum = hashlib.md5(s[1:]).digest()
sha1_sum = hashlib.sha1(s).digest()
key = md5_sum[:12] + sha1_sum
iv = hashlib.md5(s[2:]).digest()
return key, iv
def set_keepalive(sock, interval=40, attempts=5):
sock.setsockopt(socket.SOL_SOCKET, socket.SO_KEEPALIVE, 1)
if hasattr(socket, "TCP_KEEPIDLE"):
sock.setsockopt(socket.IPPROTO_TCP, socket.TCP_KEEPIDLE, interval)
if hasattr(socket, "TCP_KEEPINTVL"):
sock.setsockopt(socket.IPPROTO_TCP, socket.TCP_KEEPINTVL, interval)
if hasattr(socket, "TCP_KEEPCNT"):
sock.setsockopt(socket.IPPROTO_TCP, socket.TCP_KEEPCNT, attempts)
async def do_middleproxy_handshake(dc_idx, cl_ip, cl_port):
START_SEQ_NO = -2
NONCE_LEN = 16
RPC_NONCE = b"\xaa\x87\xcb\x7a"
RPC_HANDSHAKE = b"\xf5\xee\x82\x76"
CRYPTO_AES = b"\x01\x00\x00\x00"
RPC_NONCE_ANS_LEN = 32
RPC_HANDSHAKE_ANS_LEN = 32
# pass as consts to simplify code
RPC_FLAGS = b"\x00\x00\x00\x00"
use_ipv6_tg = PREFER_IPV6
use_ipv6_clt = (":" in cl_ip)
if use_ipv6_tg:
if not 0 <= dc_idx < len(TG_MIDDLE_PROXIES_V6):
return False
addr, port = TG_MIDDLE_PROXIES_V6[dc_idx]
else:
if not 0 <= dc_idx < len(TG_MIDDLE_PROXIES_V4):
return False
addr, port = TG_MIDDLE_PROXIES_V4[dc_idx]
try:
reader_tgt, writer_tgt = await asyncio.open_connection(addr, port)
set_keepalive(writer_tgt.get_extra_info("socket"))
except ConnectionRefusedError as E:
print_err("Got connection refused while trying to connect to", addr, port)
return False
except OSError as E:
print_err("Unable to connect to", addr, port)
return False
writer_tgt = MTProtoFrameStreamWriter(writer_tgt, START_SEQ_NO)
key_selector = PROXY_SECRET[:4]
crypto_ts = int.to_bytes(int(time.time()) % (256**4), 4, "little")
nonce = bytes([random.randrange(0, 256) for i in range(NONCE_LEN)])
msg = RPC_NONCE + key_selector + CRYPTO_AES + crypto_ts + nonce
writer_tgt.write(msg)
await writer_tgt.drain()
old_reader = reader_tgt
reader_tgt = MTProtoFrameStreamReader(reader_tgt, START_SEQ_NO)
ans = await reader_tgt.read(READ_BUF_SIZE)
if len(ans) != RPC_NONCE_ANS_LEN:
return False
rpc_type, rpc_key_selector, rpc_schema, rpc_crypto_ts, rpc_nonce = (
ans[:4], ans[4:8], ans[8:12], ans[12:16], ans[16:32]
)
if rpc_type != RPC_NONCE or rpc_key_selector != key_selector or rpc_schema != CRYPTO_AES:
return False
# get keys
tg_ip, tg_port = writer_tgt.upstream.get_extra_info('peername')[:2]
my_ip, my_port = writer_tgt.upstream.get_extra_info('sockname')[:2]
global my_ip_info
if not use_ipv6_tg:
if my_ip_info["ipv4"]:
# prefer global ip settings to work behind NAT
my_ip = my_ip_info["ipv4"]
tg_ip_bytes = socket.inet_pton(socket.AF_INET, tg_ip)[::-1]
my_ip_bytes = socket.inet_pton(socket.AF_INET, my_ip)[::-1]
tg_ipv6_bytes = None
my_ipv6_bytes = None
else:
if my_ip_info["ipv6"]:
my_ip = my_ip_info["ipv6"]
tg_ip_bytes = None
my_ip_bytes = None
tg_ipv6_bytes = socket.inet_pton(socket.AF_INET6, tg_ip)
my_ipv6_bytes = socket.inet_pton(socket.AF_INET6, my_ip)
tg_port_bytes = int.to_bytes(tg_port, 2, "little")
my_port_bytes = int.to_bytes(my_port, 2, "little")
enc_key, enc_iv = get_middleproxy_aes_key_and_iv(
nonce_srv=rpc_nonce, nonce_clt=nonce, clt_ts=crypto_ts, srv_ip=tg_ip_bytes,
clt_port=my_port_bytes, purpose=b"CLIENT", clt_ip=my_ip_bytes, srv_port=tg_port_bytes,
middleproxy_secret=PROXY_SECRET, clt_ipv6=my_ipv6_bytes, srv_ipv6=tg_ipv6_bytes)
dec_key, dec_iv = get_middleproxy_aes_key_and_iv(
nonce_srv=rpc_nonce, nonce_clt=nonce, clt_ts=crypto_ts, srv_ip=tg_ip_bytes,
clt_port=my_port_bytes, purpose=b"SERVER", clt_ip=my_ip_bytes, srv_port=tg_port_bytes,
middleproxy_secret=PROXY_SECRET, clt_ipv6=my_ipv6_bytes, srv_ipv6=tg_ipv6_bytes)
encryptor = create_aes_cbc(key=enc_key, iv=enc_iv)
decryptor = create_aes_cbc(key=dec_key, iv=dec_iv)
SENDER_PID = b"IPIPPRPDTIME"
PEER_PID = b"IPIPPRPDTIME"
# TODO: pass client ip and port here for statistics
handshake = RPC_HANDSHAKE + RPC_FLAGS + SENDER_PID + PEER_PID
writer_tgt.upstream = CryptoWrappedStreamWriter(writer_tgt.upstream, encryptor, block_size=16)
writer_tgt.write(handshake)
await writer_tgt.drain()
reader_tgt.upstream = CryptoWrappedStreamReader(reader_tgt.upstream, decryptor, block_size=16)
handshake_ans = await reader_tgt.read(1)
if len(handshake_ans) != RPC_HANDSHAKE_ANS_LEN:
return False
handshake_type, handshake_flags, handshake_sender_pid, handshake_peer_pid = (
handshake_ans[:4], handshake_ans[4:8], handshake_ans[8:20], handshake_ans[20:32])
if handshake_type != RPC_HANDSHAKE or handshake_peer_pid != SENDER_PID:
return False
writer_tgt = ProxyReqStreamWriter(writer_tgt, cl_ip, cl_port, my_ip, my_port)
reader_tgt = ProxyReqStreamReader(reader_tgt)
return reader_tgt, writer_tgt
async def handle_client(reader_clt, writer_clt):
clt_data = await handle_handshake(reader_clt, writer_clt)
if not clt_data:
writer_clt.transport.abort()
return
reader_clt, writer_clt, user, dc_idx, enc_key_and_iv = clt_data
update_stats(user, connects=1)
if not USE_MIDDLE_PROXY:
if FAST_MODE:
tg_data = await do_direct_handshake(dc_idx, dec_key_and_iv=enc_key_and_iv)
else:
tg_data = await do_direct_handshake(dc_idx)
else:
cl_ip, cl_port = writer_clt.upstream.get_extra_info('peername')[:2]
tg_data = await do_middleproxy_handshake(dc_idx, cl_ip, cl_port)
if not tg_data:
writer_clt.transport.abort()
return
reader_tg, writer_tg = tg_data
if not USE_MIDDLE_PROXY and FAST_MODE:
class FakeEncryptor:
def encrypt(self, data):
return data
class FakeDecryptor:
def decrypt(self, data):
return data
reader_tg.decryptor = FakeDecryptor()
writer_clt.encryptor = FakeEncryptor()
if USE_MIDDLE_PROXY:
reader_clt = MTProtoCompactFrameStreamReader(reader_clt)
writer_clt = MTProtoCompactFrameStreamWriter(writer_clt)
async def connect_reader_to_writer(rd, wr, user):
update_stats(user, curr_connects_x2=1)
try:
while True:
data = await rd.read(READ_BUF_SIZE)
if not data:
wr.write_eof()
await wr.drain()
wr.close()
return
else:
update_stats(user, octets=len(data))
wr.write(data)
await wr.drain()
except (OSError, AttributeError, asyncio.streams.IncompleteReadError) as e:
# print_err(e)
pass
finally:
wr.transport.abort()
update_stats(user, curr_connects_x2=-1)
asyncio.ensure_future(connect_reader_to_writer(reader_tg, writer_clt, user))
asyncio.ensure_future(connect_reader_to_writer(reader_clt, writer_tg, user))
async def handle_client_wrapper(reader, writer):
try:
await handle_client(reader, writer)
except (asyncio.IncompleteReadError, ConnectionResetError, TimeoutError):
writer.transport.abort()
async def stats_printer():
global stats
while True:
await asyncio.sleep(STATS_PRINT_PERIOD)
print("Stats for", time.strftime("%d.%m.%Y %H:%M:%S"))
for user, stat in stats.items():
print("%s: %d connects (%d current), %.2f MB" % (
user, stat["connects"], stat["curr_connects_x2"] // 2,
stat["octets"] / 1000000))
print(flush=True)
def init_ip_info():
global USE_MIDDLE_PROXY
global PREFER_IPV6
global my_ip_info
TIMEOUT = 5
try:
with urllib.request.urlopen('https://v4.ifconfig.co/ip', timeout=TIMEOUT) as f:
if f.status != 200:
raise Exception("Invalid status code")
my_ip_info["ipv4"] = f.read().decode().strip()
except Exception:
pass
if PREFER_IPV6:
try:
with urllib.request.urlopen('https://v6.ifconfig.co/ip', timeout=TIMEOUT) as f:
if f.status != 200:
raise Exception("Invalid status code")
my_ip_info["ipv6"] = f.read().decode().strip()
except Exception:
PREFER_IPV6 = False
else:
print_err("IPv6 found, using it for external communication")
if USE_MIDDLE_PROXY:
if ((not PREFER_IPV6 and not my_ip_info["ipv4"]) or
(PREFER_IPV6 and not my_ip_info["ipv6"])):
print_err("Failed to determine your ip, advertising disabled")
USE_MIDDLE_PROXY = False
def print_tg_info():
global my_ip_info
ip_addrs = [ip for ip in my_ip_info.values() if ip]
if not ip_addrs:
ip_addrs = ["YOUR_IP"]
for user, secret in sorted(USERS.items(), key=lambda x: x[0]):
for ip in ip_addrs:
params = {"server": ip, "port": PORT, "secret": secret}
params_encodeded = urllib.parse.urlencode(params, safe=':')
print("{}: tg://proxy?{}".format(user, params_encodeded), flush=True)
def loop_exception_handler(loop, context):
exception = context.get("exception")
transport = context.get("transport")
if exception:
if isinstance(exception, TimeoutError):
if transport:
print_err("Timeout, killing transport")
transport.abort()
return
if isinstance(exception, OSError):
IGNORE_ERRNO = {
10038 # operation on non-socket on Windows, likely because fd == -1
}
if exception.errno in IGNORE_ERRNO:
return
loop.default_exception_handler(context)
def main():
init_stats()
if sys.platform == 'win32':
loop = asyncio.ProactorEventLoop()
asyncio.set_event_loop(loop)
loop = asyncio.get_event_loop()
loop.set_exception_handler(loop_exception_handler)
stats_printer_task = asyncio.Task(stats_printer())
asyncio.ensure_future(stats_printer_task)
task_v4 = asyncio.start_server(handle_client_wrapper,
'0.0.0.0', PORT, loop=loop)
server_v4 = loop.run_until_complete(task_v4)
if socket.has_ipv6:
task_v6 = asyncio.start_server(handle_client_wrapper,
'::', PORT, loop=loop)
server_v6 = loop.run_until_complete(task_v6)
try:
loop.run_forever()
except KeyboardInterrupt:
pass
stats_printer_task.cancel()
server_v4.close()
loop.run_until_complete(server_v4.wait_closed())
if socket.has_ipv6:
server_v6.close()
loop.run_until_complete(server_v6.wait_closed())
loop.close()
if __name__ == "__main__":
init_ip_info()
print_tg_info()
main()