Python でソルト生成してハッシュ値メモ

(python2.7)

import random


def generate_salt(digit_num):
    DIGITS_AND_ALPHABETS = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
    return "".join(random.sample(DIGITS_AND_ALPHABETS, digit_num))

salt = generate_salt(20)
print(salt)
# => 6FVWlstUjcGf7Dm48ekN

import hashlib
salt = '6FVWlstUjcGf7Dm48ekN'
digest = hashlib.sha256(salt + 'hoge').hexdigest()
print(digest)
# => fc7f81f346906c8633341ed5c5a4765ce0c9419b3e87529de199d287d0f4cab3

参考

• 14.1. hashlib — Secure hashes and message digests — Python 2.7.9 documentation

• Hashing in SHA512 using a salt? - Python - Stack Overflow

• Creating a salt in python - Stack Overflow

• 追記：ソルト加えるなら HMAC が基本らしい...

  • 14.2. hmac — メッセージ認証のための鍵付きハッシュ化 — Python 2.7ja1 documentation