import os
import hmac
import socket
secret_key = b'egg'
sk = socket.socket()
sk.bind(('127.0.0.1',8080))
sk.listen()
def check_conn(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_conn(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 hmac
import socket
secret_key = b'egg'
sk = socket.socket()
sk.connect(('127.0.0.1',8080))
msg = sk.recv(1024)
h = hmac.new(secret_key,msg)
digest = h.digest()
sk.send(digest)
sk.close()

#_*_coding:utf-8_*_
from socket import *
import hmac,ossecret_key=b'linhaifeng bang bang bang'
def conn_auth(conn):'''认证客户端链接:param conn::return:'''print('开始验证新链接的合法性')msg=os.urandom(32)conn.sendall(msg)h=hmac.new(secret_key,msg)digest=h.digest()respone=conn.recv(len(digest))return hmac.compare_digest(respone,digest)def data_handler(conn,bufsize=1024):if not conn_auth(conn):print('该链接不合法,关闭')conn.close()returnprint('链接合法,开始通信')while True:data=conn.recv(bufsize)if not data:breakconn.sendall(data.upper())def server_handler(ip_port,bufsize,backlog=5):'''只处理链接:param ip_port::return:'''tcp_socket_server=socket(AF_INET,SOCK_STREAM)tcp_socket_server.bind(ip_port)tcp_socket_server.listen(backlog)while True:conn,addr=tcp_socket_server.accept()print('新连接[%s:%s]' %(addr[0],addr[1]))data_handler(conn,bufsize)if __name__ == '__main__':ip_port=('127.0.0.1',9999)bufsize=1024server_handler(ip_port,bufsize)

#_*_coding:utf-8_*_
__author__ = 'Linhaifeng'
from socket import *
import hmac,ossecret_key=b'linhaifeng bang bang bang'
def conn_auth(conn):'''验证客户端到服务器的链接:param conn::return:'''msg=conn.recv(32)h=hmac.new(secret_key,msg)digest=h.digest()conn.sendall(digest)def client_handler(ip_port,bufsize=1024):tcp_socket_client=socket(AF_INET,SOCK_STREAM)tcp_socket_client.connect(ip_port)conn_auth(tcp_socket_client)while True:data=input('>>: ').strip()if not data:continueif data == 'quit':breaktcp_socket_client.sendall(data.encode('utf-8'))respone=tcp_socket_client.recv(bufsize)print(respone.decode('utf-8'))tcp_socket_client.close()if __name__ == '__main__':ip_port=('127.0.0.1',9999)bufsize=1024client_handler(ip_port,bufsize)

#_*_coding:utf-8_*_
__author__ = 'Linhaifeng'
from socket import *def client_handler(ip_port,bufsize=1024):tcp_socket_client=socket(AF_INET,SOCK_STREAM)tcp_socket_client.connect(ip_port)while True:data=input('>>: ').strip()if not data:continueif data == 'quit':breaktcp_socket_client.sendall(data.encode('utf-8'))respone=tcp_socket_client.recv(bufsize)print(respone.decode('utf-8'))tcp_socket_client.close()if __name__ == '__main__':ip_port=('127.0.0.1',9999)bufsize=1024client_handler(ip_port,bufsize)

#_*_coding:utf-8_*_
__author__ = 'Linhaifeng'
from socket import *
import hmac,ossecret_key=b'linhaifeng bang bang bang1111'
def conn_auth(conn):'''验证客户端到服务器的链接:param conn::return:'''msg=conn.recv(32)h=hmac.new(secret_key,msg)digest=h.digest()conn.sendall(digest)def client_handler(ip_port,bufsize=1024):tcp_socket_client=socket(AF_INET,SOCK_STREAM)tcp_socket_client.connect(ip_port)conn_auth(tcp_socket_client)while True:data=input('>>: ').strip()if not data:continueif data == 'quit':breaktcp_socket_client.sendall(data.encode('utf-8'))respone=tcp_socket_client.recv(bufsize)print(respone.decode('utf-8'))tcp_socket_client.close()if __name__ == '__main__':ip_port=('127.0.0.1',9999)bufsize=1024client_handler(ip_port,bufsize)