danog/MadelineProto
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chidea 2015-03-12 01:57:30 +09:00
commit f2b846223c
2 changed files with 96 additions and 122 deletions
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TL_schema.JSON Normal file
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217
mtproto.py
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@ -5,57 +5,33 @@ Created on Tue Sep 2 19:26:15 2014
@author: agrigoryev
"""
from binascii import crc32
import struct
import socket
import re
from datetime import datetime
import sys
import io
import configparser
import json
import socket
import struct
current_module = sys.modules[__name__]
def vis(bs):
l = len(bs)
n = len(bs) // 8
"""
Function to visualize byte streams. Split into bytes, print to console.
:param bs: BYTE STRING
"""
symbols_in_one_line = 8
n = len(bs) // symbols_in_one_line
for i in range(n):
print(" ".join(["%02X" % b for b in bs[i*8:i*8+8]]))
print(" ".join(["%02X" % b for b in bs[i*8+8:]])+"\n")
class TlElement:
def __init__(self, type_string):
tl_re = re.compile("""([a-z]\w*) #name
\#?([0-9a-f]{8})?\s+ #id
(\{.*\}\s+)? #subtype
(.*)\s+ #arguments list
=\s+([A-Z]\w*) #result
(\s+(\w+))?; #subresult""", re.X)
assert isinstance(type_string, str)
x = tl_re.match(type_string)
if x is not None:
self.name = x.groups()[0]
if x.groups()[1] is not None:
self.id = int(x.groups()[1], 16)
else:
self.id = crc32(re.sub("(#[0-9a-f]{8})|([;\n{}])", "", type_string).encode())
self.args = self.get_arg_list(x.groups()[3])
self.result = x.groups()[4]
else:
raise SyntaxError
@staticmethod
def get_arg_list(arg_string):
arg_re = re.compile("([\w0-9]+)?:?([\w0-9]+)(<([\w0-0]+)>)?")
res = []
for s in arg_re.findall(arg_string):
d = {'name': s[0], 'type': s[1], 'subtype': s[3] if s[2] is not None else None}
res.append(d)
return res
print(" ".join(["%02X" % b for b in bs[i*symbols_in_one_line:(i+1)*symbols_in_one_line]])) # for every 8 symbols line
print(" ".join(["%02X" % b for b in bs[(i+1)*symbols_in_one_line:]])+"\n") # for last line
class TL:
def __init__(self):
with open("TL_schema.JSON", 'r') as f:
TL_dict = json.load(f)
self.methods = TL_dict['methods']
self.constructors = TL_dict['constructors']
self.func_dict_id = {}
self.func_dict_name = {}
self.obj_dict_id = {}
@ -63,83 +39,52 @@ class TL:
# Read constructors
f = open("TL_schema", 'r')
for line in f:
if line.startswith("---functions---"):
break
try:
z = TlElement(line)
self.obj_dict_id[z.id] = z
self.obj_dict_name[z.result] = z
except SyntaxError:
pass
for elem in self.constructors:
z = TlElement(elem)
self.func_dict_id = {}
# Read methods
def serialize(self, type_, data):
# 1. Type constructor ID
# 2. type costructor params
for line in f:
if line.startswith("---functions---"):
break
try:
z = TlElement(line)
self.func_dict_id[z.id] = z
self.func_dict_name[z.name] = z
except SyntaxError:
pass
# Bare types
if type_ == 'string':
assert isinstance(data, str)
struct.pack("<L", len(data))
if type_ == 'int':
assert isinstance(data, str)
struct.pack("<L", len(data))
def deserialize(self, byte_string, type_=None, subtype=None):
def tl_serialize(self, elem, kwargs):
assert isinstance(elem, TlElement)
for arg in elem.args:
pass
return struct.pack("<L", )
def tl_function_generator(elem, session, tl):
def dummy(**kwargs):
message = tl_serialize(elem, kwargs)
session.send_message(message)
answer = session.recv_message()
return deserialize(answer, TL)
def class_generator(self, tl_element):
class Dummy:
def __init__(self, bstring):
assert isinstance(bstring, bytes)
f = io.BytesIO(bstring)
dict = self.deserialize(f, type=tl_element.type)
def serialize(self, type=None, subtype=None):
pass
def deserialize(self, string, type=None, subtype=None):
if isinstance(string, io.BytesIO):
bytes_io = string
elif isinstance(string, bytes):
bytes_io = io.BytesIO(string)
if isinstance(byte_string, io.BytesIO):
bytes_io = byte_string
elif isinstance(byte_string, bytes):
bytes_io = io.BytesIO(byte_string)
else:
raise Exception("Bad input type, use bytes string or BytesIO object")
raise TypeError("Bad input type, use bytes string or BytesIO object")
# Built-in bare types
if type == 'int':
if type_ == 'int':
x = struct.unpack('<i', bytes_io.read(4))[0]
elif type == '#':
elif type_ == '#':
x = struct.unpack('<I', bytes_io.read(4))[0]
elif type == 'long':
elif type_ == 'long':
x = struct.unpack('<q', bytes_io.read(8))[0]
elif type == 'double':
elif type_ == 'double':
x = struct.unpack('<d', bytes_io.read(8))[0]
elif type == 'int128':
elif type_ == 'int128':
t = struct.unpack('<16s', bytes_io.read(16))[0]
x = int.from_bytes(t, 'little')
elif type == 'int256':
elif type_ == 'int256':
t = struct.unpack('<32s', bytes_io.read(32))[0]
x = int.from_bytes(t, 'little')
elif type == 'bytes':
elif type_ == 'bytes':
l = int.from_bytes(bytes_io.read(1), 'little')
x = bytes_io.read(l)
bytes_io.read(-(l+1) % 4) # skip padding bytes
elif type == 'string':
elif type_ == 'string':
l = int.from_bytes(bytes_io.read(1), 'little')
assert l <=254
if l == 254:
@ -152,10 +97,10 @@ class TL:
x = bytes_io.read(l)
bytes_io.read(-(l+1) % 4) # skip padding bytes
assert isinstance(x, bytes)
elif type == 'vector':
elif type_ == 'vector':
assert subtype is not None
count = int.from_bytes(bytes_io.read(4), 'little')
x = [self.deserialize(bytes_io, type=subtype) for i in range(count)]
x = [self.deserialize(bytes_io, type_=subtype) for i in range(count)]
else:
# Boxed types
@ -163,57 +108,85 @@ class TL:
try:
tl_elem = self.obj_dict_id[i]
except:
raise Exception("Could not extract type: %s" % type)
raise Exception("Could not extract type: %s" % type_)
base_boxed_types = ["Vector", "Int", "Long", "Double", "String", "Int128", "Int256"]
if tl_elem.result in base_boxed_types:
x = self.deserialize(bytes_io, type=tl_elem.name, subtype=subtype)
x = self.deserialize(bytes_io, type_=tl_elem.name, subtype=subtype)
else: # other types
x = {}
for arg in tl_elem.args:
x[arg['name']] = self.deserialize(bytes_io, type=arg['type'], subtype=arg['subtype'])
x[arg['name']] = self.deserialize(bytes_io, type_=arg['type'], subtype=arg['subtype'])
return x
class Session:
def __init__(self, credentials):
config = configparser.ConfigParser()
config.read(credentials)
def __init__(self, ip, port):
# creating socket
self.sock = socket.socket()
self.sock.connect((config['App data']['ip_adress'], config['App data'].getint('port')))
self.api_id = config['App data'].getint('api_id')
self.api_hash = config['App data']['api_hash']
self.auth_key_id = b'\x00\x00\x00\x00\x00\x00\x00\x00'
self.sock.connect((ip, port))
self.auth_key_id = None
self.number = 0
self.TL = TL()
def header(self, message):
return (self.auth_key_id +
struct.pack('<Q', int(datetime.utcnow().timestamp()*2**32)) +
def __del__(self):
# closing socket when session object is deleted
self.sock.close()
@staticmethod
def header_unencrypted(message):
"""
Creating header for the unencrypted message:
:param message: byte string to send
"""
# Basic instructions: https://core.telegram.org/mtproto/description#unencrypted-message
# Message id: https://core.telegram.org/mtproto/description#message-identifier-msg-id
msg_id = int(datetime.utcnow().timestamp()*2**30)*4
return (b'\x00\x00\x00\x00\x00\x00\x00\x00' +
struct.pack('<Q', msg_id) +
struct.pack('<L', len(message)))
# TCP Transport
# Instructions may be found here: https://core.telegram.org/mtproto#tcp-transport
# If a payload (packet) needs to be transmitted from server to client or from client to server,
# it is encapsulated as follows: 4 length bytes are added at the front (to include the length,
# the sequence number, and CRC32; always divisible by 4) and 4 bytes with the packet sequence number
# within this TCP connection (the first packet sent is numbered 0, the next one 1, etc.),
# and 4 CRC32 bytes at the end (length, sequence number, and payload together).
def send_message(self, message):
"""
Forming the message frame and sending message to server
:param message: byte string to send
"""
print('>>')
vis(message)
#self.number += 1
data = self.header(message) + message
vis(message) # Sending message visualisation to console
data = self.header_unencrypted(message) + message
step1 = struct.pack('<LL', len(data)+12, self.number) + data
step2 = step1 + struct.pack('<L', crc32(step1))
self.sock.send(step2)
self.number += 1
def recv_message(self):
"""
Reading socket and receiving message from server. Check the CRC32 and
"""
packet_length_data = self.sock.recv(4)
if len(packet_length_data) > 0: # if we have smth. in the socket
packet_length = struct.unpack("<L", packet_length_data)[0]
packet = self.sock.recv(packet_length - 4)
self.number = struct.unpack("<L", packet[0:4])[0]
auth_key_id = struct.unpack("<8s", packet[4:12])[0]
message_id = struct.unpack("<8s", packet[12:20])[0]
message_id = struct.unpack("<8s", packet[12:20])[0]
message_length = struct.unpack("<I", packet[20:24])[0]
data = packet[24:24+message_length]
crc = packet[-4:]
if crc32(packet_length_data + packet[0:-4]).to_bytes(4,'little') == crc:
# Checking the CRC32 correctness of received data
if crc32(packet_length_data + packet[0:-4]).to_bytes(4, 'little') == crc:
print('<<')
vis(data)
vis(data) # Received message visualisation to console
return data