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PyCryptoPlus: a pycrypto extension written 100% in Python
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PYCRYPTOPLUS ============= TABLE OF CONTENTS ================== 1. WHAT IS CRYPTOPLUS 2. INSTALLING 3. GETTING STARTED 4. LIMITATIONS 1. WHAT IS CRYPTOPLUS ====================== PyCryptoPlus is an extension to the Python Crypto module (www.pycrypto.org). PyCryptoPlus provides same ciphers as included in pycrypto but also new ones, all being written 100% in Python. Some additional chaining modes have been added, also in pure Python, while the ones already available in pycrypto are provided in pure python in this package. The reasoning is that Python code has the advantage to be more readable and so easier to be adapted to your needs or experiments. All other functions of pycrypto are still available via the interface of CryptoPlus. The new cipher implementations can be accessed via CryptoPlus.Cipher.python_* while the original ones from pycrypto are still available under their original name via CryptoPlus.Cipher.*. When using the original ciphers, the original pycrypto code written in C is used but the chaining modes being used are the new ones in Python. New functions: Ciphers: Rijndael Serpent Twofish Chaining Modes: XTS CMAC Note: for the cipher algorithms, code has been reused from third parties. Corresponding copyright notices are available in their source code. 2. INSTALLING ============== required packages before installing: - python-setuptools - python-pkg-resources python setup.py install 3. GETTING STARTED =================== Same API from PyCrypto can be used. See: http://www.dlitz.net/software/pycrypto/doc/ Biggest changes are the addition of some chain modes and block ciphers. A lot of examples are provided as docstrings. Have a look at them in '../CryptoPlus/Cipher/*.py' or via an interactive python session by using 'CryptoPlus.Cipher.python_AES.new?'. Once a cipher object is constructed with 'cipher = CryptoPlus.Cipher.python_AES.new(...)' you can get more info about encrypting and decrypting by reading the apprioprate docstring ('cipher.encrypt?','cipher.decrypt?'). Some test functions are provided in the docstrings and in the 'test' folder. Run all the doctests in the new Cipher function by using the '../test/test_doctest.py' script. '../test/test.py' provides some test function for the testvectors available from the module via 'CryptoPlus.Cipher.testvectors'. Have a look at the test.py sourcecode to have an idea of how to use those test vectors. 4. LIMITATIONS =============== CMAC can only be used with ciphers of 64 or 128 bits blocksizes XTS can only be used with ciphers of 128 bits blocksize