Question

How to hash a file using the SHA-1 hashing algorithm in Python

Answer 1

import hashlib

BLOCK_SIZE = 1024

def hash_file(filename):
    sha1 = hashlib.sha1()
    with open(filename, 'rb') as file:
        buf = file.read(BLOCK_SIZE)
        while len(buf) > 0:
            sha1.update(buf)
            buf = file.read(BLOCK_SIZE)
    return sha1.hexdigest()

sha1_file = hash_file("d:\data.txt")
print(sha1_file)

'''
run:

76ce11dfae23755820c99076c068cae775f04dbc

'''

 

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Answer 2

import hashlib

BLOCK_SIZE = 1024

def hash_file(filename):
    sha1 = hashlib.sha1()
    with open(filename, 'rb') as file:
        buf = 0
        while buf != b'':
            buf = file.read(BLOCK_SIZE)
            sha1.update(buf)
    return sha1.hexdigest()

sha1_file = hash_file("d:\data.txt")
print(sha1_file)

'''
run:

76ce11dfae23755820c99076c068cae775f04dbc

'''

 

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