Ex.
No: 5 Check Message IntegrityAnd Confidentiality Using SSL
Program:
KeyStore
Command to create KeyStore file:
keytool -genkeypair -keyalg RSA -keysize 2048 -validity 365 -alias myserverkey -keystore
samlKeystore.jks -storepass password -keypass password -dname
"CN=localhost,OU=Unknown,O=Unknown,L=Unknown,ST=Unknown,C=Unknown"
Server.java
import javax.net.ssl.*;
import java.io.*;
import java.security.*;
public class Server {
public static void main(String[] args) {
try {
// Load the keystore
char[] keystorePassword = "password".toCharArray();
char[] keyPassword = "password".toCharArray();
KeyStore keyStore = KeyStore.getInstance("JKS");
try (FileInputStream fis = new FileInputStream("samlKeystore.jks")) {
keyStore.load(fis, keystorePassword);
}
// Set up the key manager factory
KeyManagerFactory kmf = KeyManagerFactory.getInstance("SunX509");
kmf.init(keyStore, keyPassword);
// Set up the SSL context
SSLContext sslContext = SSLContext.getInstance("TLS");
sslContext.init(kmf.getKeyManagers(), null, null);
// Create the server socket factory
SSLServerSocketFactory ssf = sslContext.getServerSocketFactory();
SSLServerSocket serverSocket = (SSLServerSocket) ssf.createServerSocket(9999);
System.out.println("Server started. Waiting for client connection...");
// Accept client connections
SSLSocket socket = (SSLSocket) serverSocket.accept();
// Set up input and output streams
BufferedReader in = new BufferedReader(new
InputStreamReader(socket.getInputStream()));
PrintWriter out = new PrintWriter(socket.getOutputStream(), true);
// Read message from client
String message = in.readLine();
System.out.println("Received message from client: " + message);
// Send response back to client
out.println("Message received by server");
// Close streams and socket
out.close();
in.close();
socket.close();
serverSocket.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}
Client.java
import javax.net.ssl.*;
import java.io.*;
import java.security.*;
public class Client {
public static void main(String[] args) throws Exception {
// Load the truststore
char[] truststorePassword = "password".toCharArray();
KeyStore trustStore = KeyStore.getInstance("JKS");
FileInputStream fis = new FileInputStream("samlKeystore.jks");
trustStore.load(fis, truststorePassword);
// Set up the trust manager factory
TrustManagerFactory tmf = TrustManagerFactory.getInstance("SunX509");
tmf.init(trustStore);
// Set up the SSL context
SSLContext sslContext = SSLContext.getInstance("TLS");
sslContext.init(null, tmf.getTrustManagers(), null);
// Create the socket factory
SSLSocketFactory sf = sslContext.getSocketFactory();
SSLSocket socket = (SSLSocket) sf.createSocket("localhost", 9999);
// Set up input and output streams
PrintWriter out = new PrintWriter(socket.getOutputStream(), true);
BufferedReader in = new BufferedReader(new
InputStreamReader(socket.getInputStream()));
// Send message to server
out.println("Hello from client");
// Read response from server
String response = in.readLine();
System.out.println("Response from server: " + response);
// Close streams and socket
out.close();
in.close();
socket.close();
}
}
Output:
