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A python version of XTEA

Project description

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This is an XTEA-Cipher implementation in Python (eXtended Tiny Encryption Algorithm).

XTEA is a blockcipher with 8 bytes blocksize and 16 bytes Keysize (128-Bit). The algorithm is secure at 2014 with the recommend 64 rounds (32 cycles). This implementation supports following modes of operation: ECB, CBC, CFB, OFB, CTR

Example:

>>> from xtea import *
>>> key = " "*16  # Never use this
>>> text = "This is a text. "*8
>>> x = new(key, mode=MODE_OFB, IV="12345678")
>>> c = x.encrypt(text)
>>> text == x.decrypt(c)
True

Resources

Changelog

Version 0.7.1, former 0.6.1 / 0.7.0; Jun 16, 2018

  • Improved tests

  • PEP8-style formatting

  • Unittests: Counter, modes (but not results of them!), test vectors

  • [BREAKING CHANGE] Counter class is now in xtea.counter

  • Python 3.3 is not tested anymore on Travis CI

  • [BREAKING CHANGE] CFB mode is now correctly implemented. By setting partition_size it is possible to set the internal partition size (in bits) as per PEP-272.

  • Python 3: An optional C extension improves speed upto a factor of 10.

  • [BREAKING CHANGE] block_size and key_size is now in bytes.

  • Skipped 0.7.0 with

(unreleased) Version 0.6.0; Oct 16, 2016

  • Python 3 does work now

  • [BREAKING CHANGE] counters cannot return numbers any more, they must return bytestrings now

  • [BREAKING CHANGE] Cipher objects remember state, so two consecutive calls to XTEACipher.encrypt should not return the same

  • improved documentation

(unreleased) Version 0.5.0; Oct 15, 2016

  • Removed CBCMAC

Version 0.4.1; Jul 30, 2015

  • Fixed installer

Version 0.4.0; Jul 12, 2014

  • Buggless & PEP compliant CTR

  • CTR mode works with strings now

  • raises DeprecatedWarning if a number is returned

  • CBCMAC class added (use static method CBCMAC.new(args) to create)

Version 0.3.2; Jul 11, 2014

  • Minor Fixes

Version 0.3.1; Jul 11, 2014

  • Minor Fixes

  • Fixed that the length of data will not be checked

Version 0.3.0; Jul 11, 2014

  • Added CFB mode

  • Fully working with PEP 272

  • Raising NotImplementedError only on PGP-CFB (OpenPGP) mode

  • Wheel support and changelog (0.2.1)

(unreleased) Version 0.2.1 - dev; Jul 10, 2014

  • Added better wheel support for uploading (just for me) with a setup.cfg

  • Added this file (auto uploading on pypi/warehouse and github)

  • (upload.py for github)

Version 0.2.0; Jul 9, 2014

  • Added a test feature; warning in CTR

  • Raises warning on CTR, added a handler that CTR will not crash anymore ;)

Version 0.1.1; Jul 9, 2014

  • Module raises a NotImplementedError on CFB

  • Minor changes

Version 0.1; Jun 22, 2014

  • Initial release

  • Supports all mode except CFB

  • Buggy CTR ( “ß” = “\xc3\x9f” )

  • Working with PEP 272, default mode is ECB

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