Python uses socket to achieve network data encryption and decryption communication through SSL/TLS encryption protocol

In order to use sockets in Python to achieve network data encryption and decryption communication through SSL/TLS encryption protocol, some preparatory work needs to be done. Preparation work: 1. Install Python: Ensure that Python is installed and the correct environment variables are set. 2. Install OpenSSL: SSL/TLS is implemented based on the OpenSSL library, so OpenSSL needs to be installed. Dependent class libraries: 1. Socket: Python Standard library, used for network communication. 2. ssl: Python's Standard library, used for SSL/TLS encryption protocol. 3. Certification: A third-party library used for certificate verification, which can be installed through the pip install certification command. The following is a complete example that demonstrates how to use sockets and SSL libraries to establish encrypted communication between clients and servers. ##Client code python import socket import ssl #Create a socket sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) #Packaging the socket as an SSL socket ssl_sock = ssl.wrap_socket(sock, cert_reqs=ssl.CERT_REQUIRED, ca_certs="./ca.crt") #Connect to server ssl_sock.connect(('localhost', 8888)) #Sending data ssl_sock.sendall(b'Hello, server!') #Receive server response data = ssl_sock.recv(1024) print('Received from server:', data.decode()) #Close Connection ssl_sock.close() sock.close() ##Server side code python import socket import ssl #Create a socket sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) sock.bind(('localhost', 8888)) sock.listen(1) #Load SSL certificate and private key ssl_context = ssl.create_default_context(ssl.Purpose.CLIENT_AUTH) ssl_context.load_cert_chain(certfile="./server.crt", keyfile="./server.key") #Accept client connections conn, addr = sock.accept() #Packaging the socket as an SSL socket ssl_sock = ssl_context.wrap_socket(conn, server_side=True) #Receive client data data = ssl_sock.recv(1024) print('Received from client:', data.decode()) #Sending data to the client ssl_sock.sendall(b'Hello, client!') #Close Connection ssl_sock.close() sock.close() Summary: Through the above code example, it can be seen that Python provides socket and SSL libraries to achieve encrypted communication. Client uses ssl.wrap_ The socket function wraps a regular socket as an SSL socket and establishes an encrypted connection with the server. Server side through ssl. create_ Default_ Context and SSL_ Context. wrap_ The socket function creates an SSL socket and loads the SSL certificate and private key. The client and server send and receive encrypted data through sendall and recv functions. Finally, close the SSL socket and regular socket. The use of SSL/TLS encryption protocol can provide security for network data communication, ensuring the confidentiality and integrity of data.