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("", 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("", encoding='utf-8'))
 print("SHA1加密:", hhb.hexdigest())

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

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

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

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

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

 #=================SHA3_512()加密=====================
 hhb = hashlib.sha3_512()
 ret = hhb.update(bytes("", 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 = "\n" + username + "|" + md5(password)   #  "\n"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 == "":
         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 == "":
         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。