pysha2

License

This software is distributed under the MIT License.

About

pysha2 is a pure Python implementation of the FIPS 180-2 secure hash standard. I originally wrote and published this on the web prior to the inclusion of hashlib into the Python standard library. Unfortunately, the original source was lost due to a hard drive failure. However, the library proved useful to some at the time (mainly due to the prevalence of Python 2.3 and 2.4), and so I was able to recover all but the unit tests (which I later rewrote).

Since then, Python 2 was deprecated and reached its end-of-life. Contributors have since found this implementation useful as an educational tool, and have given it a new life by updating it to Python 3.

Usage

The library supports both the "old" Python 2 hash interface of the md5 and sha modules, as well as the "new" hash interface introduced by hashlib. This was intended to permit you to use pysha2 as a drop-in replacement for either interface and make updating to SHA2 easier in legacy applications.

A quick example of hashing a string:

import sha2

print sha2.sha256("Can you keep a secret?").hexdigest()

Testing

To run the included unit tests:

python test_pysha2.py

in the current directory, or use pytest.