import hmac

# h = hmac.new() #括号里要给它连个bytes类型，一个是自定义的secret_key，一个是你想进行加密的bytes

# 密文 = h.digest()

# hmac.compare_digest() #括号内传另外一个密文，看是否相等

h = hmac.new(b'secret',b'')

digest = h.digest()

print(digest)

#>>>>  b'\xa4<\r\xf8\xec0\x7f\x8ao\xec\xa7(\xf7[t\xfb'

h = hmac.new(b'secret',b'')

digest2 = h.digest()

print(hmac.compare_digest(digest,digest2)) #返回true

import os

import hmac

import socket

secret_key = b'wwl'

sk = socket.socket()

sk.bind(('127.0.0.1',8080))

sk.listen()

def check_client(conn):

    msg = os.urandom(32)

    conn.send(msg)

    h = hmac.new(secret_key,msg)

    digest = h.digest()

    client_digest = conn.recv(1024)

    return hmac.compare_digest(digest,client_digest)

conn,addr = sk.accept()

res = check_client(conn)

if res:

    print('合法的客户端')

    conn.close()

else:

    print('不合法的客户端')

    conn.close()

sk.close()

import socket

import hmac

secret_key = b'wwl111'

sk = socket.socket()

sk.connect(('127.0.0.1',8080))

msg = sk.recv(1024)

h = hmac.new(secret_key,msg)

client_digest = h.digest()

sk.send(client_digest)

sk.close()

import socketserver

class MyServer(socketserver.BaseRequestHandler):

    def handle(self):#原来socket写的程序里所有和conn有关的操作，都挪到handle方法里

        #self.request#相当于conn  #一旦客户端断开连接了，handle方法也应该结束

        while True:

            msg = self.request.recv(1024).decode('utf-8')

            if msg == 'q':break

            print(msg)

            info = input('%s>>>> '%msg[:2])

            self.request.send(info.encode('utf-8'))

if __name__ == '__main__':

    server = socketserver.ThreadingTCPServer(('127.0.0.1',8080),MyServer)

    server.serve_forever()

import socket

sk = socket.socket()

sk.connect(('127.0.0.1',8080))

while True:

    msg = input('>>>> ')

    if msg == 'q':

        break

    sk.send(msg.encode('utf-8'))

    ret = sk.recv(1024).decode('utf-8')

    print(ret)

sk.close()