MainClass.java Source code

Introduction

Here is the source code for MainClass.java

Source

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.security.SecureRandom;

import javax.crypto.KeyGenerator;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESKeySpec;

public class MainClass {

    public static void main(String args[]) throws Exception {

        KeyGenerator keyGen = KeyGenerator.getInstance("DES");
        SecureRandom random = SecureRandom.getInstance("SHA1PRNG", "SUN");
        random.setSeed(101L);
        keyGen.init(56, random);
        SecretKey sKey = keyGen.generateKey();
        SecretKeyFactory kfactory = SecretKeyFactory.getInstance("DES");

        DESKeySpec kspec = (DESKeySpec) kfactory.getKeySpec(sKey, DESKeySpec.class);

        System.out.println(sKey);
        FileOutputStream fos = new FileOutputStream("secretKeys");
        ObjectOutputStream oos = new ObjectOutputStream(fos);

        oos.writeObject(kspec.getKey());

        FileInputStream fin = new FileInputStream("secretKeys");
        ObjectInputStream ois = new ObjectInputStream(fin);

        byte[] kMaterial = (byte[]) ois.readObject();

        DESKeySpec keyspec = new DESKeySpec(kMaterial);
        SecretKey newKey = kfactory.generateSecret(keyspec);
        System.out.println(newKey);
        System.out.println("Do the keys equal :" + newKey.equals(sKey));

    }
}