SHA256

The SHA256 class implements the SHA-256 hash algorithm, as a direct wrapper on top of the functionality provided by hashlib, which is part of the SHA-2 family of cryptographic hash functions. SHA-256 is widely used for generating secure 256-bit hash values from arbitrary input data and is commonly used in digital signatures, certificates, and blockchain technologies.

class SHA256

Creates a new SHA256 instance.

Introduction

SHA-256 (Secure Hash Algorithm 256-bit) is one of the most popular cryptographic hash functions used today. It produces a 256-bit hash value, which is typically represented as a 64-character hexadecimal number. SHA-256 is widely used in security applications and protocols, including TLS and SSL, PGP, SSH, and Bitcoin. It is a member of the SHA-2 family, which was designed to overcome the weaknesses found in SHA-1.

Usage

# Example usage of SHA256 to generate hash
from cryptosystems import SHA256
sha256 = SHA256()
message_hash = sha256.hash("Hello World") # b'\x7f\x83\xb1e\x7f\xf1\xfcS\xb9-\xc1\x81H\xa1\xd6]\xfc-K\x1f\xa3\xd6w(J\xdd\xd2\x00\x12m\x90i'
file_hash = sha256.hash_file("test.txt") # b'\x7f\x83\xb1e\x7f\xf1\xfcS\xb9-\xc1\x81H\xa1\xd6]\xfc-K\x1f\xa3\xd6w(J\xdd\xd2\x00\x12m\x90i'

Methods

hash(message: int | str | bytes) → bytes

Hashes the given message using the SHA-256 Algorithm and returns the digest.

Parameters:

message – The message to compute the MD5 hash of.

Returns:

The SHA-256 hash digest of the message.

Return type:

str

hash_file(file: str) → bytes

Hashes the given file using the SHA-256 Algorithm and returns the digest.

Parameters:

file (str) – The original hash value to compare with the computed hash.

Returns:

The SHA-256 hash digest of the file with the given filename.

Return type:

str