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: 113ccbcda570622489c183f6a6e0121eSHA1加密: 40bd001563085fc35165329ea1ff5c5ecbdbbeefSHA224加密: 78d8045d684abd2eece923758f3cd781489df3a48e1278982466017fSHA256加密: a665a45920422f9d417e4867efdc4fb8a04a1f3fff1fa07e998e86f7f7a27ae3SHA512加密: 3c9909afec25354d551dae21590bb26e38d53f2173b8d3dc3eee4c047e7ab1c1eb8b85103e3be7ba613b31bb5c9c36214dc9f14a42fd7a2fdb84856bca5c44c2SHA3_256加密: a03ab19b866fc585b5cb1812a2f63ca861e7e7643ee5d43fd7106b623725fd67SHA3_384加密: 9bd942d1678a25d029b114306f5e1dae49fe8abeeacd03cfab0f156aa2e363c988b1c12803d4a8c9ba38fdc873e5f007SHA3_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 Falsedef 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 = "\n" + username + "|" + md5(password) # "\n"换行符 f.write(temp) return Truedef 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 Falsedef 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。

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