Python的加密模块md5、sha、crypt使用实例
MD5(Message-Digest Algorithm 5) 模块用于计算信息密文(信息摘要),得出一个128位的密文。sha模块跟md5相似,但生成的是160位的签名。使用方法是相同的。
如下实例是使用md5的:
# /usr/bin/python
# -*- coding:utf-8 -*-
import base64
try:
import hashlib
hash = hashlib.md5()
except ImportError:
# for Python import md5
hash = md5.new()
hash.update('spam,spam,and egges')
value = hash.digest()
print repr(value) #得到的是二进制的字符串
print hash.hexdigest() #得到的是一个十六进制的值
print base64.encodestring(value) #得到base64的值
# /usr/bin/python
# -*- coding:utf-8 -*-
# 客户端与服务器端通信的信息的验证
import string
import random
def getchallenge():
challenge = map(lambda i: chr(random.randint(0,255)),range(16))
return string.join(challenge,"")
def getresponse(password,challenge):
try:
import hashlib
hash = hashlib.md5()
except ImportError:
# for Python
import md5
hash = md5.new()
hash.update(password)
hash.update(challenge)
return hash.digest()
print "client: ","connect"
challenge= getchallenge()
print "server: ",repr(challenge)
client_response = getresponse("trustno1",challenge)
print "client: ",repr(client_response)
server_response = getresponse("trustno1",challenge)
if client_response == server_response:
print "server:","login ok"
crypt 模块(只用于 Unix)实现了单向的 DES 加密, Unix 系统使用这个加密算法来储存密码, 这个模块真正也就只在检查这样的密码时有用。
如下实例,展示了如何使用 crypt.crypt 来加密一个密码, 将密码和 salt组合起来然后传递给函数, 这里的 salt 包含两位随机字符.现在你可以扔掉原密码而只保存加密后的字符串了。
# /usr/bin/python
# -*- coding:utf-8 -*-
import crypt
import random,string
def getsalt(chars = string.letters+string.digits):
return random.choice(chars)+random.choice(chars)
salt = getsalt()
print salt
print crypt.crypt('bananas',salt)
PS:关于加密技术,本站还提供了如下加密工具供大家参考使用:
MD5在线加密工具:http://tools.jb51.net/password/CreateMD5Password
Escape加密/解密工具:http://tools.jb51.net/password/escapepwd
在线SHA1加密工具:http://tools.jb51.net/password/sha1encode
短链(短网址)在线生成工具:http://tools.jb51.net/password/dwzcreate
短链(短网址)在线还原工具:http://tools.jb51.net/password/unshorturl
高强度密码生成器:http://tools.jb51.net/password/CreateStrongPassword

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