{{ message }}
forked from pyrogram/pyrogram
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathsession.py
More file actions
478 lines (369 loc) · 15.8 KB
/
Copy pathsession.py
File metadata and controls
478 lines (369 loc) · 15.8 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
# Pyrogram - Telegram MTProto API Client Library for Python
# Copyright (C) 2017-2020 Dan <https://github.com/delivrance>
#
# This file is part of Pyrogram.
#
# Pyrogram is free software: you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as published
# by the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Pyrogram is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with Pyrogram. If not, see <http://www.gnu.org/licenses/>.
import logging
import threading
import time
from datetime import timedelta, datetime
from hashlib import sha1, sha256
from io import BytesIO
from os import urandom
from queue import Queue
from threading import Event, Thread
import pyrogram
from pyrogram import __copyright__, __license__, __version__
from pyrogram.api import functions, types, core
from pyrogram.api.all import layer
from pyrogram.api.core import Message, TLObject, MsgContainer, Long, FutureSalt, Int
from pyrogram.connection import Connection
from pyrogram.crypto import AES, KDF
from pyrogram.errors import RPCError, InternalServerError, AuthKeyDuplicated, FloodWait
from .internals import MsgId, MsgFactory
log = logging.getLogger(__name__)
class Result:
def __init__(self):
self.value = None
self.event = Event()
class Session:
INITIAL_SALT = 0x616e67656c696361
NET_WORKERS = 1
START_TIMEOUT = 1
WAIT_TIMEOUT = 15
SLEEP_THRESHOLD = 60
MAX_RETRIES = 5
ACKS_THRESHOLD = 8
PING_INTERVAL = 5
notice_displayed = False
BAD_MSG_DESCRIPTION = {
16: "[16] msg_id too low, the client time has to be synchronized",
17: "[17] msg_id too high, the client time has to be synchronized",
18: "[18] incorrect two lower order msg_id bits, the server expects client message msg_id to be divisible by 4",
19: "[19] container msg_id is the same as msg_id of a previously received message",
20: "[20] message too old, it cannot be verified by the server",
32: "[32] msg_seqno too low",
33: "[33] msg_seqno too high",
34: "[34] an even msg_seqno expected, but odd received",
35: "[35] odd msg_seqno expected, but even received",
48: "[48] incorrect server salt",
64: "[64] invalid container"
}
def __init__(
self,
client: pyrogram,
dc_id: int,
auth_key: bytes,
is_media: bool = False,
is_cdn: bool = False
):
if not Session.notice_displayed:
print("Pyrogram v{}, {}".format(__version__, __copyright__))
print("Licensed under the terms of the " + __license__, end="\n\n")
Session.notice_displayed = True
self.client = client
self.dc_id = dc_id
self.auth_key = auth_key
self.is_media = is_media
self.is_cdn = is_cdn
self.connection = None
self.auth_key_id = sha1(auth_key).digest()[-8:]
self.session_id = Long(MsgId())
self.msg_factory = MsgFactory()
self.current_salt = None
self.pending_acks = set()
self.recv_queue = Queue()
self.results = {}
self.ping_thread = None
self.ping_thread_event = Event()
self.next_salt_thread = None
self.next_salt_thread_event = Event()
self.net_worker_list = []
self.is_connected = Event()
def start(self):
while True:
self.connection = Connection(
self.dc_id,
self.client.storage.test_mode(),
self.client.ipv6,
self.client.proxy
)
try:
self.connection.connect()
for i in range(self.NET_WORKERS):
self.net_worker_list.append(
Thread(
target=self.net_worker,
name="NetWorker#{}".format(i + 1)
)
)
self.net_worker_list[-1].start()
Thread(target=self.recv, name="RecvThread").start()
self.current_salt = FutureSalt(0, 0, self.INITIAL_SALT)
self.current_salt = FutureSalt(
0, 0,
self._send(
functions.Ping(ping_id=0),
timeout=self.START_TIMEOUT
).new_server_salt
)
self.current_salt = self._send(functions.GetFutureSalts(num=1), timeout=self.START_TIMEOUT).salts[0]
self.next_salt_thread = Thread(target=self.next_salt, name="NextSaltThread")
self.next_salt_thread.start()
if not self.is_cdn:
self._send(
functions.InvokeWithLayer(
layer=layer,
query=functions.InitConnection(
api_id=self.client.api_id,
app_version=self.client.app_version,
device_model=self.client.device_model,
system_version=self.client.system_version,
system_lang_code=self.client.lang_code,
lang_code=self.client.lang_code,
lang_pack="",
query=functions.help.GetConfig(),
)
),
timeout=self.START_TIMEOUT
)
self.ping_thread = Thread(target=self.ping, name="PingThread")
self.ping_thread.start()
log.info("Session initialized: Layer {}".format(layer))
log.info("Device: {} - {}".format(self.client.device_model, self.client.app_version))
log.info("System: {} ({})".format(self.client.system_version, self.client.lang_code.upper()))
except AuthKeyDuplicated as e:
self.stop()
raise e
except (OSError, TimeoutError, RPCError):
self.stop()
except Exception as e:
self.stop()
raise e
else:
break
self.is_connected.set()
log.debug("Session started")
def stop(self):
self.is_connected.clear()
self.ping_thread_event.set()
self.next_salt_thread_event.set()
if self.ping_thread is not None:
self.ping_thread.join()
if self.next_salt_thread is not None:
self.next_salt_thread.join()
self.ping_thread_event.clear()
self.next_salt_thread_event.clear()
self.connection.close()
for i in range(self.NET_WORKERS):
self.recv_queue.put(None)
for i in self.net_worker_list:
i.join()
self.net_worker_list.clear()
self.recv_queue.queue.clear()
for i in self.results.values():
i.event.set()
if not self.is_media and callable(self.client.disconnect_handler):
try:
self.client.disconnect_handler(self.client)
except Exception as e:
log.error(e, exc_info=True)
log.debug("Session stopped")
def restart(self):
self.stop()
self.start()
def pack(self, message: Message):
data = Long(self.current_salt.salt) + self.session_id + message.write()
padding = urandom(-(len(data) + 12) % 16 + 12)
# 88 = 88 + 0 (outgoing message)
msg_key_large = sha256(self.auth_key[88: 88 + 32] + data + padding).digest()
msg_key = msg_key_large[8:24]
aes_key, aes_iv = KDF(self.auth_key, msg_key, True)
return self.auth_key_id + msg_key + AES.ige256_encrypt(data + padding, aes_key, aes_iv)
def unpack(self, b: BytesIO) -> Message:
assert b.read(8) == self.auth_key_id, b.getvalue()
msg_key = b.read(16)
aes_key, aes_iv = KDF(self.auth_key, msg_key, False)
data = BytesIO(AES.ige256_decrypt(b.read(), aes_key, aes_iv))
data.read(8)
# https://core.telegram.org/mtproto/security_guidelines#checking-session-id
assert data.read(8) == self.session_id
message = Message.read(data)
# https://core.telegram.org/mtproto/security_guidelines#checking-sha256-hash-value-of-msg-key
# https://core.telegram.org/mtproto/security_guidelines#checking-message-length
# 96 = 88 + 8 (incoming message)
assert msg_key == sha256(self.auth_key[96:96 + 32] + data.getvalue()).digest()[8:24]
# https://core.telegram.org/mtproto/security_guidelines#checking-msg-id
# TODO: check for lower msg_ids
assert message.msg_id % 2 != 0
return message
def net_worker(self):
name = threading.current_thread().name
log.debug("{} started".format(name))
while True:
packet = self.recv_queue.get()
if packet is None:
break
try:
data = self.unpack(BytesIO(packet))
messages = (
data.body.messages
if isinstance(data.body, MsgContainer)
else [data]
)
log.debug("Received:\n{}".format(data))
for msg in messages:
if msg.seq_no % 2 != 0:
if msg.msg_id in self.pending_acks:
continue
else:
self.pending_acks.add(msg.msg_id)
if isinstance(msg.body, (types.MsgDetailedInfo, types.MsgNewDetailedInfo)):
self.pending_acks.add(msg.body.answer_msg_id)
continue
if isinstance(msg.body, types.NewSessionCreated):
continue
msg_id = None
if isinstance(msg.body, (types.BadMsgNotification, types.BadServerSalt)):
msg_id = msg.body.bad_msg_id
elif isinstance(msg.body, (core.FutureSalts, types.RpcResult)):
msg_id = msg.body.req_msg_id
elif isinstance(msg.body, types.Pong):
msg_id = msg.body.msg_id
else:
if self.client is not None:
self.client.updates_queue.put(msg.body)
if msg_id in self.results:
self.results[msg_id].value = getattr(msg.body, "result", msg.body)
self.results[msg_id].event.set()
if len(self.pending_acks) >= self.ACKS_THRESHOLD:
log.info("Send {} acks".format(len(self.pending_acks)))
try:
self._send(types.MsgsAck(msg_ids=list(self.pending_acks)), False)
except (OSError, TimeoutError):
pass
else:
self.pending_acks.clear()
except Exception as e:
log.error(e, exc_info=True)
log.debug("{} stopped".format(name))
def ping(self):
log.debug("PingThread started")
while True:
self.ping_thread_event.wait(self.PING_INTERVAL)
if self.ping_thread_event.is_set():
break
try:
self._send(functions.PingDelayDisconnect(
ping_id=0, disconnect_delay=self.WAIT_TIMEOUT + 10
), False)
except (OSError, TimeoutError, RPCError):
pass
log.debug("PingThread stopped")
def next_salt(self):
log.debug("NextSaltThread started")
while True:
now = datetime.now()
# Seconds to wait until middle-overlap, which is
# 15 minutes before/after the current/next salt end/start time
valid_until = datetime.fromtimestamp(self.current_salt.valid_until)
dt = (valid_until - now).total_seconds() - 900
log.debug("Current salt: {} | Next salt in {:.0f}m {:.0f}s ({})".format(
self.current_salt.salt,
dt // 60,
dt % 60,
now + timedelta(seconds=dt)
))
self.next_salt_thread_event.wait(dt)
if self.next_salt_thread_event.is_set():
break
try:
self.current_salt = self._send(functions.GetFutureSalts(num=1)).salts[0]
except (OSError, TimeoutError, RPCError):
self.connection.close()
break
log.debug("NextSaltThread stopped")
def recv(self):
log.debug("RecvThread started")
while True:
packet = self.connection.recv()
if packet is None or len(packet) == 4:
if packet:
log.warning("Server sent \"{}\"".format(Int.read(BytesIO(packet))))
if self.is_connected.is_set():
Thread(target=self.restart, name="RestartThread").start()
break
self.recv_queue.put(packet)
log.debug("RecvThread stopped")
def _send(self, data: TLObject, wait_response: bool = True, timeout: float = WAIT_TIMEOUT):
message = self.msg_factory(data)
msg_id = message.msg_id
if wait_response:
self.results[msg_id] = Result()
log.debug("Sent:\n{}".format(message))
payload = self.pack(message)
try:
self.connection.send(payload)
except OSError as e:
self.results.pop(msg_id, None)
raise e
if wait_response:
self.results[msg_id].event.wait(timeout)
result = self.results.pop(msg_id).value
if result is None:
raise TimeoutError
elif isinstance(result, types.RpcError):
if isinstance(data, (functions.InvokeWithoutUpdates, functions.InvokeWithTakeout)):
data = data.query
RPCError.raise_it(result, type(data))
elif isinstance(result, types.BadMsgNotification):
raise Exception(self.BAD_MSG_DESCRIPTION.get(
result.error_code,
"Error code {}".format(result.error_code)
))
else:
return result
def send(
self,
data: TLObject,
retries: int = MAX_RETRIES,
timeout: float = WAIT_TIMEOUT,
sleep_threshold: float = SLEEP_THRESHOLD
):
self.is_connected.wait(self.WAIT_TIMEOUT)
if isinstance(data, (functions.InvokeWithoutUpdates, functions.InvokeWithTakeout)):
query = data.query
else:
query = data
query = ".".join(query.QUALNAME.split(".")[1:])
while True:
try:
return self._send(data, timeout=timeout)
except FloodWait as e:
amount = e.x
if amount > sleep_threshold:
raise
log.warning('[{}] Sleeping for {}s (required by "{}")'.format(
self.client.session_name, amount, query))
time.sleep(amount)
except (OSError, TimeoutError, InternalServerError) as e:
if retries == 0:
raise e from None
(log.warning if retries < 2 else log.info)(
'[{}] Retrying "{}" due to {}'.format(
Session.MAX_RETRIES - retries + 1,
query, e))
time.sleep(0.5)
return self.send(data, retries - 1, timeout)
You can’t perform that action at this time.