hashes.sha256
=============

.. py:module:: hashes.sha256

.. autoapi-nested-parse::

   Implementation of SHA256 Hash function in a Python class and provides utilities
   to find hash of string or hash of text from a file.

   Usage: python sha256.py --string "Hello World!!"
          python sha256.py --file "hello_world.txt"
          When run without any arguments,
          it prints the hash of the string "Hello World!! Welcome to Cryptography"

   References:
   https://qvault.io/cryptography/how-sha-2-works-step-by-step-sha-256/
   https://en.wikipedia.org/wiki/SHA-2



Classes
-------

.. autoapisummary::

   hashes.sha256.SHA256
   hashes.sha256.SHA256HashTest


Functions
---------

.. autoapisummary::

   hashes.sha256.main


Module Contents
---------------

.. py:class:: SHA256(data: bytes)

   Class to contain the entire pipeline for SHA1 Hashing Algorithm

   >>> SHA256(b'Python').hash
   '18885f27b5af9012df19e496460f9294d5ab76128824c6f993787004f6d9a7db'

   >>> SHA256(b'hello world').hash
   'b94d27b9934d3e08a52e52d7da7dabfac484efe37a5380ee9088f7ace2efcde9'


   .. py:method:: final_hash() -> None


   .. py:method:: preprocessing(data: bytes) -> bytes
      :staticmethod:



   .. py:method:: ror(value: int, rotations: int) -> int

      Right rotate a given unsigned number by a certain amount of rotations



   .. py:attribute:: data


   .. py:attribute:: hashes
      :value: [1779033703, 3144134277, 1013904242, 2773480762, 1359893119, 2600822924, 528734635, 1541459225]



   .. py:attribute:: preprocessed_data


   .. py:attribute:: round_constants
      :value: [1116352408, 1899447441, 3049323471, 3921009573, 961987163, 1508970993, 2453635748, 2870763221,...



.. py:class:: SHA256HashTest(methodName='runTest')

   Bases: :py:obj:`unittest.TestCase`


   Test class for the SHA256 class. Inherits the TestCase class from unittest


   .. py:method:: test_match_hashes() -> None


.. py:function:: main() -> None

   Provides option 'string' or 'file' to take input
   and prints the calculated SHA-256 hash