Unified py3 checking of version (kind of) and now we support py3.2+ as I've tried it on a machine

ige.py

@@ -7,8 +7,9 @@
 from __future__ import print_function
 from Crypto.Util import number
 from Crypto.Cipher import AES
+MIN_SUPPORTED_PY3_VERSION = (3, 2, 0)
 from sys import version_info
-if version_info >= (3, 4, 0):
+if version_info >= MIN_SUPPORTED_PY3_VERSION:
     from binascii import hexlify
     long = int
 
@@ -31,7 +32,7 @@ def str_bytes_to_hex_string(val):
     tmp_aes_key_hex = '\xf0\x11(\x08\x87\xc7\xbb\x01\xdf\x0f\xc4\xe1x0\xe0\xb9\x1f\xbb\x8b\xe4\xb2&|\xb9\x85\xae%\xf3;RrS'
     Convert it back to it's uppercase string representation, like:
     tmp_aes_key_str = "F011280887C7BB01DF0FC4E17830E0B91FBB8BE4B2267CB985AE25F33B527253" """
-    if version_info >= (3, 4, 0):
+    if version_info >= MIN_SUPPORTED_PY3_VERSION:
         return str(hexlify(val).upper())
     return val.encode("hex").upper()
 
@@ -44,7 +45,7 @@ def hex_string_to_long(val):
 def xor_stuff(a, b):
     """XOR applied to every element of a with every element of b.
     Depending on python version and depeding on input some arrangements need to be done."""
-    if version_info < (3, 4, 0):
+    if version_info < MIN_SUPPORTED_PY3_VERSION:
         if len(a) > len(b):
             return "".join([chr(ord(x) ^ ord(y)) for (x, y) in zip(a[:len(b)], b)])
         else:
@@ -113,7 +114,7 @@ def ige(message, key, iv, operation="decrypt"):
         else:
             ciphered_ba = bytearray(ciphered)
             ciphered_ba.extend(outdata)
-            if version_info >= (3, 4, 0):
+            if version_info >= MIN_SUPPORTED_PY3_VERSION:
                 ciphered = bytes(ciphered_ba)
             else:
                 ciphered = str(ciphered_ba)
@@ -128,7 +129,7 @@ if __name__ == "__main__":
     tmp_aes_iv_str = "3212D579EE35452ED23E0D0C92841AA7D31B2E9BDEF2151E80D15860311C85DB"
     answer_str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
 
-    if version_info < (3, 4, 0):
+    if version_info < MIN_SUPPORTED_PY3_VERSION:
         # Crypto.Cipher.AES needs it's parameters to be 32byte str
         # So we can either give 'str' type like this ONLY WORKS ON PYTHON2.7
         encrypted_answer_hex = encrypted_answer_str.decode("hex")
@@ -148,7 +149,7 @@ if __name__ == "__main__":
     print("decrypted_answer using int version of input: ")
     print(decrypted_answer_in_int)
 
-    if version_info < (3, 4, 0):
+    if version_info < MIN_SUPPORTED_PY3_VERSION:
         if decrypted_answer_in_str == decrypted_answer_in_int:
             print("\nBoth str input and int input give the same result")
         else:

mtproto.py

@@ -6,6 +6,10 @@ Created on Tue Sep  2 19:26:15 2014
 @author: Sammy Pfeiffer
 """
 from binascii import crc32 as originalcrc32
+MIN_SUPPORTED_PY3_VERSION = (3, 2, 0)
+from sys import version_info
+if version_info >= MIN_SUPPORTED_PY3_VERSION: #py3 has no long
+    long = int
 def crc32(data):
     return originalcrc32(data) & 0xffffffff
 from datetime import datetime

testing.py

@@ -6,7 +6,7 @@ import prime
 import struct
 from Crypto.Cipher import AES
 # Deal with py2 and py3 differences
-try:
+try: # this only works in py2.7
     import configparser
 except ImportError:
     import ConfigParser as configparser