python之hashlib模块

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

'''
hashlib：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, SHA384, SHA512 ，MD5 算法
'''

import hashlib

# ######## md5 ########
hash = hashlib.md5()    #创建一个md5对象
# help(hash.update)
hash.update(bytes('admin', encoding='utf-8'))   #进行加密，python3中参数必须为字节类型（bytes），python2不需要
print(hash.hexdigest())   #获取md5加密后的结果
print(hash.digest())   #二进制表示加密结果
'''
下面两种加密等价
import hashlib

s = 'lihui'
hash = hashlib.md5()
hash.update(bytes('123',encoding='utf-8'))
hash.update(bytes(s,encoding='utf-8'))
print(hash.hexdigest())

s = 'lihui'
hash = hashlib.md5(bytes('123',encoding='utf-8'))
hash.update(bytes(s,encoding='utf-8'))
print(hash.hexdigest())
'''

######## sha1 ########

hash = hashlib.sha1()
hash.update(bytes('admin', encoding='utf-8'))
print(hash.hexdigest())


# ######## sha256 ########

hash = hashlib.sha256()
hash.update(bytes('admin', encoding='utf-8'))
print(hash.hexdigest())

# ######## sha384 ########

hash = hashlib.sha384()
hash.update(bytes('admin', encoding='utf-8'))
print(hash.hexdigest())

# ######## sha512 ########

hash = hashlib.sha512()
hash.update(bytes('admin', encoding='utf-8'))
print(hash.hexdigest())