20181202 2019-2020-2 《Python程序设计》实验三报告

课程：《Python程序设计》
班级： 1812
姓名：李祎铭
学号：20181202
实验教师：王志强
实验日期：2020年5月20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

构建service和client框架

# service
import socket
while True:
    s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    s.bind(('127.0.0.1', 8001))
    s.listen()
    conn, add = s.accept()
    data = conn.recv(1024)
    print(data.decode())
    conn.sendall(("服务器已经收到了数据内容："+str(data.decode())).encode())
    s.close()

# client
import socket
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect(('127.0.0.1', 8001))
#str为文件内容
s.sendall(str.encode()) #需要编码

client端文件读取加密操作(RSA加密)

待发送文件和socket架构在同一目录

with open("./TCP/test.txt", 'rb') as fp:
    data = fp.read()
    key = open('./TCP/public.pem').read()
    publickey = RSA.importKey(key)
    # 进行加密
    pk = PKCS1_v1_5.new(publickey)
    encrypt_text = pk.encrypt(data)
    # 加密通过base64进行编码
    result = base64.b64encode(encrypt_text)
    #print(result.decode())

service端消息解密写入文件(RSA解密)

data = str(data,'utf-8')
msg = base64.b64decode(data)
privatekey = open('./TCP/private.pem').read()
rsakey = RSA.importKey(privatekey)
# 进行解密
cipher = PKCS1_v1_5.new(rsakey)
text = cipher.decrypt(msg, 'DecryptError')
print(text.decode())
with open("./TCP/ser.txt" , "w") as fp:
    fp.write(text.decode())

client端完整代码

import socket
import base64
from Crypto.PublicKey import RSA
from Crypto.Cipher import PKCS1_v1_5
# 客户端的socket初始化
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect(('127.0.0.1', 8001)) #以元组的形式连接

with open("./TCP/test.txt", 'rb') as fp:
    data = fp.read()
    key = open('./TCP/public.pem').read()
    publickey = RSA.importKey(key)
    # 进行加密
    pk = PKCS1_v1_5.new(publickey)
    encrypt_text = pk.encrypt(data)
    # 加密通过base64进行编码
    result = base64.b64encode(encrypt_text)
    print(result.decode())
#

s.sendall(bytes(result.decode(),'utf-8')) #需要编码

#接收
data = s.recv(1024)
print(data.decode())
s.close

service端完整代码

import socket
import base64
from Crypto.PublicKey import RSA
from Crypto.Cipher import PKCS1_v1_5
# 服务端的socket初始化
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

s.bind(('127.0.0.1', 8001)) #绑定
s.listen() #监听

conn,address = s.accept()
data = conn.recv(2048)
data = str(data,'utf-8')
msg = base64.b64decode(data)
privatekey = open('./TCP/private.pem').read()
rsakey = RSA.importKey(privatekey)
# 进行解密
cipher = PKCS1_v1_5.new(rsakey)
text = cipher.decrypt(msg, 'DecryptError')
print(text.decode())
with open("./TCP/ser.txt" , "w") as fp:
    fp.write(text.decode())

conn.sendall(("服务器已经收到了加密数据").encode())
# +str(data.decode())).encode()
s.close()