diff --git a/ige.js b/ige.js new file mode 100644 index 00000000..6b2b76d0 --- /dev/null +++ b/ige.js @@ -0,0 +1,3 @@ +/** + * Created by sam on 13/03/15. + */ diff --git a/research_decrypt_mode.py b/research_decrypt_mode.py index a142b4d8..066c28bd 100644 --- a/research_decrypt_mode.py +++ b/research_decrypt_mode.py @@ -1,29 +1,223 @@ # -*- coding: utf-8 -*- +# Inspiration: http://passingcuriosity.com/2009/aes-encryption-in-python-with-m2crypto/ +# sudo apt-get install swig +# sudo pip install M2Crypto +def vis(bs): + """ + Function to visualize byte streams. Split into bytes, print to console. + :param bs: BYTE STRING + """ + bs = bytearray(bs) + symbols_in_one_line = 8 + n = len(bs) // symbols_in_one_line + for i in range(n): + 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 + if not len(bs) % symbols_in_one_line == 0: + print(str((i+1)*symbols_in_one_line)+" | "+" ".join(["%02X" % b for b in bs[(i+1)*symbols_in_one_line:]])+"\n") # for last line + +# Got from https://core.telegram.org/mtproto/samples-auth_key#conversion-of-encrypted-answer-into-answer +# They say they use AES 256 IGE +# Infinite Garble Extension (IGE) is a block cipher mode. (http://www.links.org/files/openssl-ige.pdf) +encrypted_answer_str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tmp_aes_key_str = "F011280887C7BB01DF0FC4E17830E0B91FBB8BE4B2267CB985AE25F33B527253" +tmp_aes_iv_str = "3212D579EE35452ED23E0D0C92841AA7D31B2E9BDEF2151E80D15860311C85DB" +answer_str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onvert them to strings +# http://stackoverflow.com/questions/5649407/hexadecimal-string-to-byte-array-in-python +encrypted_answer = encrypted_answer_str.decode("hex") # int(encrypted_answer_str, 16) for py3 +tmp_aes_key = tmp_aes_key_str.decode("hex") +tmp_aes_iv = tmp_aes_iv_str.decode("hex") +answer = answer_str.decode("hex") + +print("len(encrypted_answer): " + str(len(encrypted_answer))) +print("len(answer): " + str(len(answer))) + # Got from testing.py -encrypted_answer = 'L\xd7\xddI\x0b\xc3\xeay\xf1\x07]\x93\x7fY\x0cmVAX\x03\xeb\n}\x99\xd6\x99\xaa\xba\x05\x9d\xaaB\xe2\x97\xb3\xf2\xf8\xd8\x9f\xa6\x13\x177a\xb45A\x0f}\xb3\x99\xa3D?L\x94\xa3\xbcG\xe8\xf2\x14 \xb9.\x8b\xa0\xf1\xa5\xf1\x18\x9aZ2\x8f\xae\x05\xd9\x84H\xa3&\xad\x84\x82w\x9e\xe8\xba\x8a\x87QT\xdd\x12\x8c\x86\xde\xd8\x7fLM\xb9\x81H;JX\x85\x14\x1af!\xb20\xea)\xa8>(\xa9\xce5,\x96\x14\xd7P\x0c\xb3\x02\x9a\x16\xfc\x94\xacT\xa0\xd4\x82\xe5S1\xf4\xe1\x8cB\xad\x89\xc3C\xa6\rt)\xfa\x0b\xfe3\t\xdd\x02\xbe\xecP\xd6\xd7p\xf6\xf3\xb5\xdf6\xfc\x90l\xaa\x06\x8a\xc0XO\x96>\x85\x18\xebN\x08\x13x\xc0\x1ah\xbd\xedO\x99T\xfd\xed\x87C}\x89!\x99Oz\xfe\x927z~ &"\x0e/\x01N\x13\xfa\xd1\x96\x87\x0f\x83\x98d\x12X\xa7\x8c\xa8\x1c/\xbc\xab\xb2:\x07\xa6\x14\xfa\xe3\xd2\x8cG\xd6\x84\xe4[\x8f\x9e\x8f\xbb\x9c\x8a\x80\xbd\xcf\xaf!\xf7E\x1b\x1f\x91\x18\xc2\x8eBE\xfb\x84\xb6\xc5e5Q\xfd\xb8\xcb\xbc\xb4\x9f\xb7\x92\xfe\xae\xda,\xfaA\x94\x7fq\x1e\xd1\x05\xe8=\x9d#,\xe6\xb7y1\xe6\xc7!\xa0\x0bx\xd1\xb3\xad9\xc4\xdd\x99Y\xca\r\x07+\x903\x1e?\x1d_\x8b\xb0M\xff\x14\xc3:\x95\xa8\xee\xc1\xb5\xff\xfb1\x95\xe1\xcaT\xe4D\xcf\xd2%\x11\xeb@`Att\xbe\x11\xfc/\x05\x9a\xd2\x15\r\xb6\x9d\x88\xae\xa8\xd1q\xe5\x9b\x05A\x8d[\xbf\xaaN\x1b\xee\xbf#4\x1c\xd5\xa4\x1f\x0fo\xaf\xd0\x00g\xc1\x9a\x82\x00\x8c_\xd4\xac!{K\xca\x89x\xde\xf9\x8d\x19\xec\x12\x8epY\xdb\x9f\x98\xe6\x88\xe7\xc1\x92\x90\x17\x80\x03Ry\xf1n\x97e\xe2\x8c\xe9\x8c\xd6<\xba2:\x9f\x06g\x05\xaa#\xf4\xca1\x16o\xb5\x8b\xcd\xfe\x814h\xac\xcd\x0e\xd0\x1c\x0c\xc71\x11\xbe\xa5\xb3#\xcfh\x07)\x91\xc7\xc8iy!\x03\xc8\xf0\xb2\x02\xf3\xc7\xdf\xafXm\xf5\xaf\xdd\xc8\xeb\xb3n7\xe34\xa7R\x8c\xaf\xa3\xb7y\xe7\x12\x0f\x0c\xc2\xa8v\x12E\xc3u\xc8Y\x1fh.\xcf\x01\xae\x8c\x00"v\x99V\xad>\xaf\x08)\x83V*\x9b\xad\xc0\x9c\x94\xa5D[\x08s\x88\xd1\xcb\xf6\xf8j\xa1c\xc1yb\xda\x12\xa1~\xf6\xd1"\x14\x11a\x02\xc1\xd3\xf5' -tmp_aes_key = b'\x82\xeb\x12\x0e\xbeT\x80>!\xaa\x01\xac\xc8\xe1u#d\x1b\x08\xf5G\xc7\xe5g\xa9\xc3\x1d*BC;6' -tmp_aes_iv = b'r\xbb/\xe8\x0bb,T\x19\x17\xf20WsTf\x1d_C\x83|2h\xd3s\x82\xaeVW\x10v\xff' +# encrypted_answer = 'L\xd7\xddI\x0b\xc3\xeay\xf1\x07]\x93\x7fY\x0cmVAX\x03\xeb\n}\x99\xd6\x99\xaa\xba\x05\x9d\xaaB\xe2\x97\xb3\xf2\xf8\xd8\x9f\xa6\x13\x177a\xb45A\x0f}\xb3\x99\xa3D?L\x94\xa3\xbcG\xe8\xf2\x14 \xb9.\x8b\xa0\xf1\xa5\xf1\x18\x9aZ2\x8f\xae\x05\xd9\x84H\xa3&\xad\x84\x82w\x9e\xe8\xba\x8a\x87QT\xdd\x12\x8c\x86\xde\xd8\x7fLM\xb9\x81H;JX\x85\x14\x1af!\xb20\xea)\xa8>(\xa9\xce5,\x96\x14\xd7P\x0c\xb3\x02\x9a\x16\xfc\x94\xacT\xa0\xd4\x82\xe5S1\xf4\xe1\x8cB\xad\x89\xc3C\xa6\rt)\xfa\x0b\xfe3\t\xdd\x02\xbe\xecP\xd6\xd7p\xf6\xf3\xb5\xdf6\xfc\x90l\xaa\x06\x8a\xc0XO\x96>\x85\x18\xebN\x08\x13x\xc0\x1ah\xbd\xedO\x99T\xfd\xed\x87C}\x89!\x99Oz\xfe\x927z~ &"\x0e/\x01N\x13\xfa\xd1\x96\x87\x0f\x83\x98d\x12X\xa7\x8c\xa8\x1c/\xbc\xab\xb2:\x07\xa6\x14\xfa\xe3\xd2\x8cG\xd6\x84\xe4[\x8f\x9e\x8f\xbb\x9c\x8a\x80\xbd\xcf\xaf!\xf7E\x1b\x1f\x91\x18\xc2\x8eBE\xfb\x84\xb6\xc5e5Q\xfd\xb8\xcb\xbc\xb4\x9f\xb7\x92\xfe\xae\xda,\xfaA\x94\x7fq\x1e\xd1\x05\xe8=\x9d#,\xe6\xb7y1\xe6\xc7!\xa0\x0bx\xd1\xb3\xad9\xc4\xdd\x99Y\xca\r\x07+\x903\x1e?\x1d_\x8b\xb0M\xff\x14\xc3:\x95\xa8\xee\xc1\xb5\xff\xfb1\x95\xe1\xcaT\xe4D\xcf\xd2%\x11\xeb@`Att\xbe\x11\xfc/\x05\x9a\xd2\x15\r\xb6\x9d\x88\xae\xa8\xd1q\xe5\x9b\x05A\x8d[\xbf\xaaN\x1b\xee\xbf#4\x1c\xd5\xa4\x1f\x0fo\xaf\xd0\x00g\xc1\x9a\x82\x00\x8c_\xd4\xac!{K\xca\x89x\xde\xf9\x8d\x19\xec\x12\x8epY\xdb\x9f\x98\xe6\x88\xe7\xc1\x92\x90\x17\x80\x03Ry\xf1n\x97e\xe2\x8c\xe9\x8c\xd6<\xba2:\x9f\x06g\x05\xaa#\xf4\xca1\x16o\xb5\x8b\xcd\xfe\x814h\xac\xcd\x0e\xd0\x1c\x0c\xc71\x11\xbe\xa5\xb3#\xcfh\x07)\x91\xc7\xc8iy!\x03\xc8\xf0\xb2\x02\xf3\xc7\xdf\xafXm\xf5\xaf\xdd\xc8\xeb\xb3n7\xe34\xa7R\x8c\xaf\xa3\xb7y\xe7\x12\x0f\x0c\xc2\xa8v\x12E\xc3u\xc8Y\x1fh.\xcf\x01\xae\x8c\x00"v\x99V\xad>\xaf\x08)\x83V*\x9b\xad\xc0\x9c\x94\xa5D[\x08s\x88\xd1\xcb\xf6\xf8j\xa1c\xc1yb\xda\x12\xa1~\xf6\xd1"\x14\x11a\x02\xc1\xd3\xf5' +# tmp_aes_key = b'\x82\xeb\x12\x0e\xbeT\x80>!\xaa\x01\xac\xc8\xe1u#d\x1b\x08\xf5G\xc7\xe5g\xa9\xc3\x1d*BC;6' +# tmp_aes_iv = b'r\xbb/\xe8\x0bb,T\x19\x17\xf20WsTf\x1d_C\x83|2h\xd3s\x82\xaeVW\x10v\xff' from Crypto.Cipher import AES -# try all modes -aes_modes = [AES.MODE_CBC, AES.MODE_CFB, AES.MODE_CTR, AES.MODE_ECB, AES.MODE_OFB, AES.MODE_OPENPGP, AES.MODE_PGP] -aes_modes_names = ["AES.MODE_CBC", "AES.MODE_CFB", "AES.MODE_CTR", "AES.MODE_ECB", "AES.MODE_OFB", "AES.MODE_OPENPGP", "AES.MODE_PGP"] +# # try all modes +# aes_modes = [AES.MODE_CBC, AES.MODE_CFB, AES.MODE_CTR, AES.MODE_ECB, AES.MODE_OFB, AES.MODE_OPENPGP, AES.MODE_PGP] +# aes_modes_names = ["AES.MODE_CBC", "AES.MODE_CFB", "AES.MODE_CTR", "AES.MODE_ECB", "AES.MODE_OFB", "AES.MODE_OPENPGP", "AES.MODE_PGP"] +# +# working_modes = [] +# working_modenames = [] +# for mode, modename in zip(aes_modes, aes_modes_names): +# print("\n\nTrying mode: " + modename + "(" + str(mode) + ")") +# try: +# crypting_object = AES.new(tmp_aes_key, mode, tmp_aes_iv) # encrypter thing +# decrypted_answer = crypting_object.decrypt(encrypted_answer) +# print("decrypted_answer: ") +# print(decrypted_answer.__repr__()) +# vis(decrypted_answer) +# working_modes.append(mode) +# working_modenames.append(modename) +# print("Which should look the same than: ") +# print(answer.__repr__()) +# vis(answer) +# if answer == decrypted_answer: +# print("THEY ARE THE SAME!!") +# else: +# print("THEY ARE DIFFERENT :(((((") +# except Exception as e: +# print("Exception: " + str(e)) +# +# print("\n\nModes " + str(working_modenames) + " (" + str(working_modes) + ") succesfully unencrypted the answer!") -working_modes = [] -working_modenames = [] -for mode, modename in zip(aes_modes, aes_modes_names): - print("\n\nTrying mode: " + modename + "(" + str(mode) + ")") - try: - crypting_object = AES.new(tmp_aes_key, mode, tmp_aes_iv) # encrypter thing - decrypted_answer = crypting_object.decrypt(encrypted_answer) - print("decrypted_answer: ") - print(decrypted_answer.__repr__()) - working_modes.append(mode) - working_modenames.append(modename) - except Exception as e: - print("Exception: " + str(e)) -print("\n\nModes " + str(working_modenames) + " (" + str(working_modes) + ") succesfully unencrypted the answer!") +# From http://stackoverflow.com/questions/17797582/java-aes-256-decrypt-with-ige +# public static final byte[] ige(final byte[] key, final byte[] IV, +# final byte[] Message) throws Exception { +def ige(key, iv, message, blocksize=16):#32): + """given a key, ive and message, decrypt it. blocksize is the default one used in the javascript implementation""" + print("len(key): " + str(len(key))) + print("len(iv): " + str(len(iv))) + print("len(message): " + str(len(message))) + # key = bytearray(key) + # iv = bytearray(iv) + # message = bytearray(message) +# +# final Cipher cipher = Cipher.getInstance("AES/ECB/NoPadding"); + cipher = AES.new(key, AES.MODE_ECB, iv) + blocksize = cipher.block_size + +# cipher.init(Cipher.DECRYPT_MODE, new SecretKeySpec(key, "AES")); +# +# final int blocksize = cipher.getBlockSize(); +# +# byte[] xPrev = Arrays.copyOfRange(IV, 0, blocksize); + xPrev = iv[0:blocksize] +# byte[] yPrev = Arrays.copyOfRange(IV, blocksize, IV.length); + yPrev = iv[blocksize:] +# +# byte[] decrypted = new byte[0]; + decrypted = None +# +# byte[] y, x; +# y = bytearray() +# x = bytearray() +# for (int i = 0; i < Message.length; i += blocksize) { + + + def xor_strings(a, b): # xor two strings of different lengths + if len(a) > len(b): + return "".join([chr(ord(x) ^ ord(y)) for (x, y) in zip(a[:len(b)], b)]) + else: + return "".join([chr(ord(x) ^ ord(y)) for (x, y) in zip(a, b[:len(a)])]) + def add_strings(a, b): + if len(a) > len(b): + return "".join([chr(ord(x) + ord(y)) for (x, y) in zip(a[:len(b)], b)]) + else: + return "".join([chr(ord(x) + ord(y)) for (x, y) in zip(a, b[:len(a)])]) + #return sum([a, b]) & 0xFFFFFFFF + + for i in range(0, len(message), blocksize): + print("i: " + str(i)) +# x = java.util.Arrays.copyOfRange(Message, i, i + blocksize); + x = message[i:i+blocksize] + #print(" x: " + x.__repr__()) +# y = xor(cipher.doFinal(xor(x, yPrev)), xPrev); + + y = xor_strings(cipher.decrypt(xor_strings(x, yPrev)), xPrev) + #print(" y: " + y.__repr__()) + #y = xor(cipher.decrypt(xor(x, yPrev)), xPrev) +# xPrev = x; + xPrev = x +# yPrev = y; + yPrev = y +# +# decrypted = sumBytes(decrypted, y); + if decrypted is None: + decrypted = y + else: + decrypted_ba = bytearray(decrypted) + decrypted_ba.extend(y) + decrypted = str(decrypted_ba) + # all this did not work + #decrypted = int(decrypted, 16) + int(y, 16) + #decrypted.append(y) + #add_strings(decrypted, y) + #decrypted = decrypted + y # this is wrong + #print(" decrypted: " + decrypted.__repr__()) +# } +# +# return decrypted; + print("len(key): " + str(len(key))) + print("len(iv): " + str(len(iv))) + print("len(message): " + str(len(message))) + print("!!!!!!!!!!!!!!!!!!!!!! ---> cipher.block_size: " + str(cipher.block_size)) + return decrypted +# } + +result = ige(tmp_aes_key, tmp_aes_iv, encrypted_answer) +print("result:") +print(result) +vis(result) +if answer == result: + print("THEY ARE THE SAME!!") +else: + print("THEY ARE DIFFERENT :(((((") + print("len(result): " + str(len(result))) + print("len(answer):" + str(len(answer))) + +vis(encrypted_answer) +# This DOES NOT work. openssl wrapper m2crypto does not have IGE available +# from base64 import b64encode, b64decode +# from M2Crypto.EVP import Cipher +# ENC=1 +# DEC=0 +# +# def build_cipher(key, iv, op=ENC): +# """""""" +# #return Cipher(alg='aes_256_ecb', key=key, iv=iv, op=op) +# return Cipher(alg='aes_256 ige', key=key, iv=iv, op=op) +# +# def encryptor(key, iv=None): +# """""" +# # Decode the key and iv +# key = b64decode(key) +# if iv is None: +# iv = '\0' * 16 +# else: +# iv = b64decode(iv) +# +# # Return the encryption function +# def encrypt(data): +# cipher = build_cipher(key, iv, ENC) +# v = cipher.update(data) +# v = v + cipher.final() +# del cipher +# v = b64encode(v) +# return v +# return encrypt +# +# def decryptor(key, iv=None): +# """""" +# # Decode the key and iv +# #key = b64decode(key) +# if iv is None: +# iv = '\0' * 16 +# else: +# #iv = b64decode(iv) +# pass +# +# # Return the decryption function +# def decrypt(data): +# #data = b64decode(data) +# cipher = build_cipher(key, iv, DEC) +# v = cipher.update(data) +# v = v + cipher.final() +# del cipher +# return v +# return decrypt +# +# print("Decrypting with m2...") +# decryptor_m2= decryptor(tmp_aes_key, tmp_aes_iv) +# m2_decrypt_ans =decryptor_m2(encrypted_answer) +# vis(m2_decrypt_ans) + # Output was: # Trying mode: AES.MODE_CBC(2) # Exception: IV must be 16 bytes long diff --git a/testing.py b/testing.py index fbf46eb0..c3c07e30 100644 --- a/testing.py +++ b/testing.py @@ -4,6 +4,7 @@ import os import io import prime import struct +from Crypto.Cipher import AES # Deal with py2 and py3 differences try: import configparser @@ -75,11 +76,23 @@ z = Session.method_call('req_DH_params', encrypted_data=encrypted_data) encrypted_answer = z['encrypted_answer'] +print("encrypted_answer:") +print(encrypted_answer.__repr__()) tmp_aes_key = SHA.new(new_nonce + server_nonce).digest() + SHA.new(server_nonce + new_nonce).digest()[0:12] tmp_aes_iv = SHA.new(server_nonce + new_nonce).digest()[12:20] + SHA.new(new_nonce + new_nonce).digest() + new_nonce[0:4] print("\ntmp_aes_key:") mtproto.vis(tmp_aes_key) +print(tmp_aes_key.__repr__()) print("\ntmp_aes_iv:") mtproto.vis(tmp_aes_iv) +print(tmp_aes_iv.__repr__()) + +# From using research_decrypt_mode.py I got to unencrypt the answer +crypting_object = AES.new(tmp_aes_key, AES.MODE_ECB, tmp_aes_iv) # encrypter thing +decrypted_answer = crypting_object.decrypt(encrypted_answer) +print("decrypted_answer: ") +print(decrypted_answer.__repr__()) +mtproto.vis(decrypted_answer) +