61 lines
1.7 KiB
Python
61 lines
1.7 KiB
Python
# -*- coding: utf-8 -*-
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import mtproto
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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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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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client_nonce = os.urandom(16)
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x = Session.method_call('req_pq', nonce=client_nonce)
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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) |