20231318 实验三《Python程序设计》实验报告

20231318 傅述令 2024-04-23 16:05:38

20231318 2023-2024-2 《Python程序设计》实验三报告

课程：《Python程序设计》
班级： 2313
姓名：傅述令
学号：20231318
实验教师：王志强
实验日期：2024年4月21日
必修/选修：公选课

(一)实验内容

创建服务端和客户端，服务端在特定端口监听多个客户请求。
客户端和服务端通过Socket套接字（TCP/UDP）进行通信。

（二）实验过程及结果

服务端代码
作为服务端端口号为5418

import socket
from DesModule import des_decrypt, des_encrypt
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.bind(("192.168.1.104", 5418))
s.listen()
conn, address = s.accept()
data = conn.recv(1024)
print("Kunkun says:", data.decode())
conn.sendall("Kunkun, this is Mamba . What can I say? Mamba out!".encode())

s.close()

import socket

tcpserver = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
tcpserver.bind(("192.168.1.104", 5418))
tcpserver.listen(5)
while True:
    connection, address = tcpserver.accept()
    print(connection)
    while True:
        try:
            data = connection.recv(1024)
            print(data.decode("utf-8"))
            ret_data = input("请回复：")
            connection.send(ret_data.encode('utf-8'))
        except Exception:
            break
    connection.close()

客户端代码
作为客户端，端口号为8025

import socket
import os
from DesModule import *
file1 = open("Secret", "r+")
file1.write("Mamba!Mamba!Have you come to life again？")
file1.seek(0)
cryptostring = file1.readline()
print(cryptostring)
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect(("192.168.1.106", 8025))
s.sendall(cryptostring.encode())
data = s.recv(1024)
print("Mamba says:", data.decode())
s.close()

import socket

tcpclient = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
tcpclient.connect(("192.168.1.106", 8025))
while True:
    while True:
        data = input('>>>').strip()
        tcpclient.send(data.encode('utf-8'))
        ret = tcpclient.recv(1024)
        print(ret.decode('utf-8'))
tcpclient.close()

加密模块

from pyDes import *
import binascii


def des_encrypt(s, key):
    secret_key = key
    iv = secret_key
    k = des(secret_key, CBC, iv, pad=None, padmode=PAD_PKCS5)
    en = k.encrypt(s, padmode=PAD_PKCS5)
    return binascii.b2a_hex(en).decode()


def des_decrypt(s, key):
    secret_key = key
    iv = secret_key
    k = des(secret_key, CBC, iv, pad=None, padmode=PAD_PKCS5)
    de = k.decrypt(binascii.a2b_hex(s), padmode=PAD_PKCS5)
    return de.decode()


if __name__ == "__main__":
    ciphertext = des_encrypt("Kun,you are so beautiful!", "1145141919810")
    print("密文：", ciphertext)
    plaintext = des_decrypt(ciphertext, "1145141919810"
                                        "+")
    print("解密后的明文：", plaintext)