我的Python去哈希算法不起作用

Question

import hashlib

user_hash_dict = {}

with open('common_passwords.txt','r' ) as f:
    common_passwords = f.read().splitlines()

with open('user_hash.txt', 'r') as f:
    text = f.read().splitlines()
    for user_hash in text:
        username = user_hash.split(":")[0]
        hash = user_hash.split(":")[1]
        user_hash_dict[username] = hash

for password in common_passwords:
    hashed_password = hashlib.sha256(password.encode('utf-8')).hexdigest()
    for username , hash in user_hash_dict.items():
        if hashed_password == hash:
            print(f'hash found\n{username}:{password}')

文件“common_passwords.txt”和“user_hash.txt”包含常用密码库以及虚构帐户的登录名和哈希密码。

我问过我的朋友 我是一名初学者程序员，我不知道我应该做什么。

Answer 1

代码的不同结构可能会帮助您理解正在发生的事情。

首先构建 SHA256 哈希值（十六进制摘要）及其关联密码的字典。

然后处理用户文件，该文件假定被构造为多行，格式为 username:hexdigest

from hashlib import sha256 as SHA256

cpd = dict()

with open("common-passwords.txt") as cp:
    for line in map(str.rstrip, cp):
        cpd[SHA256(line.encode()).hexdigest()] = line

with open("user_hash.txt") as uh:
    for line in uh:
        user, _hash = line.rstrip().split(":")
        if (pw := cpd.get(_hash)) is not None:
            print(f"User name={user}, password={pw}")