20221218 2022-2023-2 《Python程序设计》实验三报告

jywfang 2023-04-20 22:46:28

课程：《Python程序设计》
班级： 2212
姓名：党万方
学号：20221218
实验教师：王志强
实验日期：2023年4月13日
必修/选修：公选课

1.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。

2. 实验过程及结果

1.导入加密DesModule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_descrypt(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("hello, world!", "12345678")
    print("密文：",ciphertext)
    plaintext = des_descrypt(ciphertext, "12345678")
    print("解密后的明文：", plaintext)

2.编写服务器程序

import socket
import os
from DesModule import *

s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.bind(("192.168.1.107", 8000))
s.listen()
conn, address = s.accept()
data = conn.recv(1024)
ciphertext = des_encrypt("goodnight", "wff12345")
print("解密前", data.decode())
plaintext = des_descrypt(data, "12345678")
print("来自客户端的信息是", plaintext)
if os.path.exists("C:\\Users\\党万方\\PycharmProjects\\pythonProject2\\dwf"):
    file = open("dwf", 'a+')
    file.write(plaintext)
else:
    file = open("dwf", 'w+')
    file.write(plaintext)
    file.seek(0)
file.close()
conn.sendall(ciphertext.encode())

3.编写用户端程序

import os
import socket

from DesModule import des_encrypt, des_descrypt

if os.path.exists("C:\\Users\\党万方\\PycharmProjects\\pythonProject2\\dwf"):
    file1 = open("dwf", 'r+')
else:
    file1 = open("dwf", 'w+')
    file1.write("howsitgoing")
    file1.seek(0)
howsitgoing = file1.readline()
ciphertext = des_encrypt(howsitgoing, "zmh12345")

s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect(("192.168.1.104", 8000))
s.sendall(ciphertext.encode())
data = s.recv(1024)
print("解密前", data.decode())
plaintext = des_descrypt(data, "12345678")
print("从服务器接受的数据是：", plaintext)
file1.write(plaintext)
file1.close()
s.close()

4.运行结果