Python XTEA

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 = b" "*16  # Never use this key
>>> text = b"This is a text. "*8
>>> x = new(key, mode=MODE_OFB, IV=b"12345678")  # IV's must be unpredictable
>>> c = x.encrypt(text)
>>> text == new(key, mode=MODE_OFB, IV=b"12345678").decrypt(c)
True

Resources

• PyPi: https://pypi.org/project/xtea
• Docs: http://xtea.readthedocs.io/
• Source code: https://github.com/varbin/xtea
• Issue tracker: https://github.com/varbin/xtea/issues