hashes.sha256

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

SHA256	Class to contain the entire pipeline for SHA1 Hashing Algorithm
SHA256HashTest	Test class for the SHA256 class. Inherits the TestCase class from unittest

Functions

main(→ None)

Provides option 'string' or 'file' to take input

Module Contents

class hashes.sha256.SHA256(data: bytes)

Class to contain the entire pipeline for SHA1 Hashing Algorithm

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

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

final_hash() → None

static preprocessing(data: bytes) → bytes

ror(value: int, rotations: int) → int

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

data

hashes = [1779033703, 3144134277, 1013904242, 2773480762, 1359893119, 2600822924, 528734635, 1541459225]

preprocessed_data

round_constants = [1116352408, 1899447441, 3049323471, 3921009573, 961987163, 1508970993, 2453635748, 2870763221,...

class hashes.sha256.SHA256HashTest(methodName='runTest')

Bases: unittest.TestCase

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

test_match_hashes() → None

hashes.sha256.main() → None

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