theLogicBlog

keytool -genkey -keystore ServerKeystore -alias SSLCertificate -keyalg RSA -validity 360

keytool -keystore ServerKeystore -export -alias ServerKeystore -file ServerCertificate.crt
keytool -keystore ClientKeystore -import -file ServerCertificate.cer

keytool -list -keystore ServerKeystore -v
keytool -list -keystore ClientKeystore -v

import java.io.InputStream;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.util.Scanner;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
 
import javax.net.ssl.SSLServerSocket;
import javax.net.ssl.SSLServerSocketFactory;
import javax.net.ssl.SSLSocket;
 
public class SSLServer implements Runnable {
 
	public static void main(String[] args) {
		ExecutorService executor = Executors.newSingleThreadExecutor();
		executor.execute(new SSLServer());
		System.out.println("Server started on port 7777");
		executor.shutdown();
	}
 
	@Override
	public void run() {
		try {
			// create a server socket and listen on it
			SSLServerSocket serverSocket = (SSLServerSocket) SSLServerSocketFactory
					.getDefault().createServerSocket(7777);
			SSLSocket server = (SSLSocket) serverSocket.accept();
 
			// input and output stream
			InputStream in = server.getInputStream();
			OutputStream out = server.getOutputStream();
 
			// receive data from client and echo it back
			Scanner scanner = new Scanner(in);
			PrintWriter printWriter = new PrintWriter(out);
			String line = null;
			while (scanner.hasNextLine()) {
				line = scanner.nextLine();
				System.out.println("Server received: " + line);
				printWriter.println(line);
				printWriter.flush();
			}
			scanner.close();
			server.close();
			serverSocket.close();
		} catch (Exception e) {
			System.out.println(e.getMessage());
		}
	}
}

import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.PrintWriter;
 
import javax.net.ssl.SSLSocket;
import javax.net.ssl.SSLSocketFactory;
 
public class SSLClient {
 
	public static void main(String[] args) {
 
		try {
			// create a client socket and connect to server
			SSLSocket client = (SSLSocket) SSLSocketFactory.getDefault()
					.createSocket("localhost", 7777);
 
			// output stream to server
			OutputStream out = client.getOutputStream();
 
			// input stream for user input
			InputStream in = System.in;
			InputStreamReader reader = new InputStreamReader(in);
			BufferedReader breader = new BufferedReader(reader);
 
			// send data to server
			PrintWriter printWriter = new PrintWriter(out);
			String line = null;
			while ((line = breader.readLine()) != null) {
				printWriter.println(line);
				printWriter.flush();
			}
		} catch (Exception e) {
			System.out.println(e.getMessage());
		}
	}
}

SSLServer: -Djavax.net.debug=all -Djavax.net.ssl.keyStore="/path/to/ServerKeystore"  -Djavax.net.ssl.keyStorePassword=serverKeystorePassword

SSLClient: -Djavax.net.debug=all -Djavax.net.ssl.trustStore="/path/to/ClientKeystore" -Djavax.net.ssl.trustStorePassword=clientKeystorePassword

sudo apt-get install cryptsetup

sudo cfdisk /dev/sdX

sudo luksformat -t ext2 /dev/sdX
Creating encrypted device on /dev/sdX...
Are you sure? (Type uppercase yes): YES
Enter LUKS passphrase: