Trying to go through step 4.
Generatin encrypted_data But server doesn't answer ((
This commit is contained in:
Anton Grigoryev
parent
66a5577ab9
commit
c01bb7871b
99
mtproto.py
99
mtproto.py
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@ -20,7 +20,7 @@ def vis(bs):
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symbols_in_one_line = 8
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n = len(bs) // symbols_in_one_line
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for i in range(n):
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print(" ".join(["%02X" % b for b in bs[i*symbols_in_one_line:(i+1)*symbols_in_one_line]])) # for every 8 symbols line
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print(str(i*symbols_in_one_line)+" | "+" ".join(["%02X" % b for b in bs[i*symbols_in_one_line:(i+1)*symbols_in_one_line]])) # for every 8 symbols line
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print(" ".join(["%02X" % b for b in bs[(i+1)*symbols_in_one_line:]])+"\n") # for last line
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@ -47,7 +47,6 @@ class TlMethod:
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self.params = json_dict['params']
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class TL:
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def __init__(self, filename):
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with open(filename, 'r') as f:
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@ -61,7 +60,7 @@ class TL:
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for elem in self.constructors:
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z = TlConstructor(elem)
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self.constructor_id[z.id] = z
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self.constructor_type[z.type] = z
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self.constructor_type[z.predicate] = z
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self.methods = TL_dict['methods']
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self.method_id = {}
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@ -75,39 +74,65 @@ class TL:
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## Loading TL_schema
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tl = TL("TL_schema.JSON")
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def serialize(bytes_io, type_, value):
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if type_ == "int":
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def serialize_obj(bytes_io, type_, **kwargs):
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try:
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tl_constructor = tl.constructor_type[type_]
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except KeyError:
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raise Exception("Could not extract type: %s" % type_)
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bytes_io.write(struct.pack('<i', tl_constructor.id))
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for arg in tl_constructor.params:
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serialize_param(bytes_io, type_=arg['type'], value=kwargs[arg['name']])
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def serialize_method(bytes_io, type_, **kwargs):
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try:
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tl_method = tl.method_name[type_]
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except KeyError:
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raise Exception("Could not extract type: %s" % type_)
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bytes_io.write(struct.pack('<i', tl_method.id))
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for arg in tl_method.params:
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serialize_param(bytes_io, type_=arg['type'], value=kwargs[arg['name']])
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def serialize_param(bytes_io, type_, value):
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if type_ == "int":
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assert isinstance(value, int)
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bytes_io.write(struct.pack('<i', value))
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if type_ == "int128":
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elif type_ == "long":
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assert isinstance(value, int)
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bytes_io.write(struct.pack('<q', value))
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elif type_ in ["int128", "int256"]:
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assert isinstance(value, bytes)
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bytes_io.write(struct.pack('<16s', value))
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bytes_io.write(value)
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elif type_ == 'string' or 'bytes':
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l = len(value)
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if l < 254: # short string format
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bytes_io.write(int.to_bytes(l, 1, 'little')) # 1 byte of string
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bytes_io.write(value) # string
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bytes_io.write(b'\x00'*((-l-1) % 4)) # padding bytes
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else:
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bytes_io.write(b'\xfe') # byte 254
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bytes_io.write(int.to_bytes(l, 3, 'little')) # 3 bytes of string
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bytes_io.write(value) # string
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bytes_io.write(b'\x00'*(-l % 4)) # padding bytes
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def deserialize(bytes_io, type_=None, subtype=None):
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"""
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:type bytes_io: io.BytesIO object
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"""
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assert isinstance(bytes_io, io.BytesIO)
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# Built-in bare types
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if type_ == 'int':
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x = struct.unpack('<i', bytes_io.read(4))[0]
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elif type_ == '#':
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x = struct.unpack('<I', bytes_io.read(4))[0]
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elif type_ == 'long':
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x = struct.unpack('<q', bytes_io.read(8))[0]
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elif type_ == 'double':
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x = struct.unpack('<d', bytes_io.read(8))[0]
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elif type_ == 'int128':
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t = struct.unpack('<16s', bytes_io.read(16))[0]
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x = int.from_bytes(t, 'little')
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elif type_ == 'int256':
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t = struct.unpack('<32s', bytes_io.read(32))[0]
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x = int.from_bytes(t, 'little')
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elif type_ == 'bytes':
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if type_ == 'int': x = struct.unpack('<i', bytes_io.read(4))[0]
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elif type_ == '#': x = struct.unpack('<I', bytes_io.read(4))[0]
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elif type_ == 'long': x = struct.unpack('<q', bytes_io.read(8))[0]
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elif type_ == 'double': x = struct.unpack('<d', bytes_io.read(8))[0]
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elif type_ == 'int128': x = bytes_io.read(16)
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elif type_ == 'int256': x = bytes_io.read(32)
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elif type_ == 'string' or type_ == 'bytes':
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l = int.from_bytes(bytes_io.read(1), 'little')
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x = bytes_io.read(l)
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bytes_io.read(-(l+1) % 4) # skip padding bytes
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elif type_ == 'string':
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l = int.from_bytes(bytes_io.read(1), 'little')
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assert l <=254
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assert l <= 254
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if l == 254:
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# We have a long string
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long_len = int.from_bytes(bytes_io.read(3), 'little')
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@ -127,7 +152,7 @@ def deserialize(bytes_io, type_=None, subtype=None):
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i = struct.unpack('<i', bytes_io.read(4))[0] # read type ID
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try:
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tl_elem = tl.constructor_id[i]
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except:
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except KeyError:
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raise Exception("Could not extract type: %s" % type_)
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base_boxed_types = ["Vector t", "Int", "Long", "Double", "String", "Int128", "Int256"]
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if tl_elem.type in base_boxed_types:
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@ -209,17 +234,11 @@ class Session:
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return data
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def method_call(self, method, **kwargs):
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z = io.BytesIO()
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tl_method = tl.method_name[method]
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z.write(struct.pack('<i', tl_method.id))
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for param in tl_method.params:
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serialize(bytes_io=z, value=kwargs[param['name']], type_=param['type'])
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z=io.BytesIO()
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serialize_method(z, method, **kwargs)
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self.send_message(z.getvalue())
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server_answer = self.recv_message()
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return deserialize(io.BytesIO(server_answer))
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class Telegram:
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global tl
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def connect(self, ip, port):
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self.session = Session(ip, port)
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if server_answer is not None:
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return deserialize(io.BytesIO(server_answer))
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else:
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raise Exception("Server not answered")
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2
prime.py
2
prime.py
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@ -135,4 +135,4 @@ def gcd(a, b):
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def lcm(a, b):
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return abs(a * b) // gcd(a, b)
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49
testing.py
49
testing.py
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@ -1,8 +1,10 @@
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# -*- coding: utf-8 -*-
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import mtproto
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import os
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import os, io
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import prime
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import configparser
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from Crypto.Hash import SHA
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from Crypto.PublicKey import RSA
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config = configparser.ConfigParser()
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config.read('credentials')
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@ -10,9 +12,50 @@ ip = config['App data']['ip_address']
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port = config['App data'].getint('port')
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Session = mtproto.Session(ip, port)
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x = Session.method_call('req_pq', nonce=os.urandom(16))
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client_nonce = os.urandom(16)
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x = Session.method_call('req_pq', nonce=client_nonce)
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PQ = int.from_bytes(x['pq'], 'big')
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server_nonce = x['server_nonce']
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public_key_fingerprint = x['server_public_key_fingerprints'][0]
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PQ_bytes = x['pq']
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PQ = int.from_bytes(PQ_bytes, 'big')
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[p, q] = prime.primefactors(PQ)
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if p > q: (p, q) = (q, p) # swap values in way p<q
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print("PQ = %d\np = %d, q = %d" % (PQ, p, q))
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P_bytes = int.to_bytes(p, p.bit_length()//8+1, 'big')
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Q_bytes = int.to_bytes(q, q.bit_length()//8+1, 'big')
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f = open('rsa.pub', 'r')
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key = RSA.importKey(f.read())
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z= io.BytesIO()
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new_nonce = os.urandom(32)
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mtproto.serialize_obj(z, 'p_q_inner_data',
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pq=PQ_bytes,
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p=P_bytes,
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q=Q_bytes,
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nonce=client_nonce,
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server_nonce=server_nonce,
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new_nonce=new_nonce)
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data = z.getvalue()
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sha_digest = SHA.new(data).digest()
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random_bytes = os.urandom(255-len(data)-len(sha_digest))
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to_encrypt = sha_digest + data + random_bytes
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encrypted_data = key.encrypt(to_encrypt, 0)[0]
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z = Session.method_call('req_DH_params',
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nonce=client_nonce,
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server_nonce=server_nonce,
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p=P_bytes,
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q=Q_bytes,
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public_key_fingerprint=public_key_fingerprint,
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encrypted_data=encrypted_data)
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print(z)
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