This project recreates the SHA256 algorithm in Python similar to the Python module hashlib. It can take in any string and outputs a 256 bit hash that is not reversible.

A Python client library for interfacing with the SonicWall Capture service - sonicwall/sonicwall-capture-api-python ...

Domingo Martin has published a site ' Sha256 Algorithm Explained ' that gives a good understanding of the calculation process for generating hashes with SHA-256 , which is especially used in SHA-2.