import hashlib

m = hashlib.md5()

m.update(b"Hello")     #加密

m.update(b"It's me")   #再加密一句

print(m.digest())    #二进制

print(m.hexdigest())   #16进制

#SHA1

m = hashlib.sha1()

m.update(b"Hello")     #加密

m.update(b"It's me")   #再加密一句

print(m.digest())    #二进制

print(m.hexdigest())   #16进制

#SHA512

m = hashlib.sha512()

m.update(b"Hello")     #加密

m.update(b"It's me")   #再加密一句

print(m.digest())    #二进制

print(m.hexdigest())   #16进制

#其它加密方法类似

import hmac

h = hmac.new(b'secret_key')    #生成key

h.update(b'hello')    #加密

print(h.hexdigest())

#下面是一个简单的C/S程序，使用了hmac签名

# 客户端 (signs the data)

import xmlrpclib,hmac,hashlib

key = "mysecret"

server = xmlrpclib.ServerProxy("http://localhost:8888")

name = "Homer"

signature = hmac.new(key,name).hexdigest()

print server.sayHello(signature,name)

# 服务器 (verifies the signature)

import SimpleXMLRPCServer,hmac,hashlib

key = "mysecret"

class MyClass:

    def sayHello(self, signature, name):

        if hmac.new(key,name).hexdigest() != signature:

            return "Wrong signature ! You're a hacker !"

        else:

            return u"Hello, %s !" % name

server_object = MyClass()

server = SimpleXMLRPCServer.SimpleXMLRPCServer(("localhost", 8888))   # (2)

server.register_instance(server_object)   # (3)

print "Listening on port 8888"

server.serve_forever()

#该代码片段来自于: http://www.sharejs.com/codes/python/1880