python-hashlib加密

用于加密相关的操作，代替了md5模块和sha模块，主要提供SHA1,SHA224,SHA256,SHA512,MD5算法。

以下是算法示例：

#!/usr/bin/env python
# -*- coding:utf-8 -*-
import hashlib
#=================MD5()加密=====================
hhb = hashlib.md5(bytes("jahiuhfdakj", encoding='utf-8'))  #加盐处理
ret = hhb.update(bytes("123", encoding='utf-8'))   #“123”是需要加密的字符串
print("MD5加密:", hhb.hexdigest())


#=================SHA1()加密=====================
hhb = hashlib.sha1()
ret = hhb.update(bytes("123", encoding='utf-8'))
print("SHA1加密:", hhb.hexdigest())


#=================SHA224()加密=====================
hhb = hashlib.sha224()
ret = hhb.update(bytes("123", encoding='utf-8'))
print("SHA224加密:", hhb.hexdigest())

#=================SHA256()加密=====================
hhb = hashlib.sha256()
ret = hhb.update(bytes("123", encoding='utf-8'))
print("SHA256加密:", hhb.hexdigest())

#=================SHA512()加密=====================
hhb = hashlib.sha512()
ret = hhb.update(bytes("123", encoding='utf-8'))
print("SHA512加密:", hhb.hexdigest())

#=================SHA3_256()加密=====================
hhb = hashlib.sha3_256()
ret = hhb.update(bytes("123", encoding='utf-8'))
print("SHA3_256加密:", hhb.hexdigest())

#=================SHA3_384()加密=====================
hhb = hashlib.sha3_384()
ret = hhb.update(bytes("123", encoding='utf-8'))
print("SHA3_384加密:", hhb.hexdigest())

#=================SHA3_512()加密=====================
hhb = hashlib.sha3_512()
ret = hhb.update(bytes("123", encoding='utf-8'))
print("SHA3_512加密:", hhb.hexdigest())

算法示例的结果：

MD5加密: 113ccbcda570622489c183f6a6e0121e
SHA1加密: 40bd001563085fc35165329ea1ff5c5ecbdbbeef
SHA224加密: 78d8045d684abd2eece923758f3cd781489df3a48e1278982466017f
SHA256加密: a665a45920422f9d417e4867efdc4fb8a04a1f3fff1fa07e998e86f7f7a27ae3
SHA512加密: 3c9909afec25354d551dae21590bb26e38d53f2173b8d3dc3eee4c047e7ab1c1eb8b85103e3be7ba613b31bb5c9c36214dc9f14a42fd7a2fdb84856bca5c44c2
SHA3_256加密: a03ab19b866fc585b5cb1812a2f63ca861e7e7643ee5d43fd7106b623725fd67
SHA3_384加密: 9bd942d1678a25d029b114306f5e1dae49fe8abeeacd03cfab0f156aa2e363c988b1c12803d4a8c9ba38fdc873e5f007
SHA3_512加密: 48c8947f69c054a5caa934674ce8881d02bb18fb59d5a63eeaddff735b0e9801e87294783281ae49fc8287a0fd86779b27d7972d3e84f0fa0d826d7cb67dfefc

基于hashlib.md5()对密码进行加密实现用户登录验证的示例：

#!/usr/bin/env python
# -*- coding:utf-8 -*-

import hashlib
#基于MD5对密码进行加密实现用户登录验证

def md5(arg):
    """
    使用hashlib.md5()对密码进行加密处理
    :param arg: 需要加密处理的密码
    :return:
    """
    hash = hashlib.md5(bytes("我在学习python", encoding='utf-8'))  #加盐，使用密码加密更有保障
    hash.update(bytes(arg, encoding='utf-8'))
    return hash.hexdigest()

def login(username, password):
    """
    用于用户登录验证
    :param username: 用户名
    :param password: 密码
    :return: True,登录成功；False，登录失败。
    """
    with open("user.txt", "r", encoding="utf-8") as f:
        for line in f:
            line = line.strip()  #默认strip无参数，会去掉首尾空格、换行符；有参数则去除指定值
            line_list = line.split("|")   #以|符号提取用户名和密码
            if username == line_list[0] and md5(password) == line_list[1]:
                return True
            else:
                return False

def register(username, password):
    """
    用户注册
    :param username:用户名
    :param password:密码
    :return: True，注册成功
    """
    with open("user.txt", "a", encoding="utf-8") as f:
        temp = "
" + username + "|" + md5(password)   #  "
"换行符
        f.write(temp)
    return True

def user_exsit(username):
    """
    注册时，判断用户名是否存在
    :param username:用户名
    :return:True, 用户名已存在
    """
    with open("user.txt", "r", encoding="utf-8") as f:
        for line in f:
            line = line.strip()
            line_list = line.split("|")
            if username == line_list[0]:
                return True
        return False

def main():
    print("欢迎您使用本系统,请输入你进行操作选项。")
    inp = input("1.登录；2.注册。请输入编号： ")
    if inp == "1":
        times = 1
        while True:
            if times == 4:
                print("输入3次用户名或密码不正确，请在一小时后再重试。")
                break
            user = input("请输入你的用户名：")
            pwd = input("请输入你的密码：")
            is_login = login(user, pwd)
            if is_login:
                print("恭喜您！系统登录成功。")
                break
            else:
                print("用户名或密码不正确。")
            times += 1
    if inp == "2":
        user = input("请输入你的用户名：")
        pwd = input("请输入你的密码：")
        if user_exsit(user):
            print("用户名已经存在，注册失败！")
        else:
            ret = register(user, pwd)
            if ret:
                print("注册成功！")
            else:
                print("注册失败！")

main()

加密后的user.txt的文件内容。