sha256withrsa python code example

Example 1: python sha256 of file

# Python program to find SHA256 hash string of a file
import hashlib
 
filename = input("Enter the input file name: ")
sha256_hash = hashlib.sha256()
with open(filename,"rb") as f:
    # Read and update hash string value in blocks of 4K
    for byte_block in iter(lambda: f.read(4096),b""):
        sha256_hash.update(byte_block)
    print(sha256_hash.hexdigest())

Example 2: sha 256 python

import hashlib

secret_thing = hashlib.sha256()
# Keep in mind you add on to the already existing string when you .update the same thing.
secret_thing.update(b"hahahahaahhahaa nobody will guess my secret message")

secret_thing.digest_size
secret_thing.block_size