May-25-2023, 10:39 AM
(This post was last modified: May-25-2023, 10:39 AM by JohnnyCoffee.)
Do I need to send a ( Server Hello ) as a response to the handshake ( Client Hello ) received, but I couldn’t find out why it doesn’t work? If I can help, below is an example:
import socket import ssl # Create a TCP/IP socket sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) # Bind the socket to port 443 sock.bind(("", 443)) # Listen for connections sock.listen(1) # Accept a connection conn, addr = sock.accept() # Create a SSL/TLS context ctx = ssl.SSLContext() # Load the server's certificate ctx.load_cert_chain("server.crt") # Create a SSL/TLS wrapper around the socket ssl_sock = ctx.wrap_socket(conn) # Receive the "ClientHello" message client_hello = ssl_sock.recv(16384) # Select the highest version of SSL/TLS common between the client and the server ssl_version = client_hello[0:2] # Select a set of encryption algorithms and security parameters supported by both the client and the server ciphers = ssl.get_ciphers() # Send the "ServerHello" message to the client ssl_sock.sendall(b"Server Hello\n" + ssl_version + b"\n" + ciphers + b"\n") # Receive the "ClientKeyExchange" message from the client client_key_exchange = ssl_sock.recv(16384) # Generate a shared secret shared_secret = ssl.generate_shared_secret(client_key_exchange) # Encrypt the data stream ssl_sock.write(shared_secret) # Receive data from the client data = ssl_sock.read() # Decrypt the data decrypted_data = ssl.decrypt_data(data, shared_secret) # Print the decrypted data print(decrypted_data) # Close the socket ssl_sock.close()