TestCipher.java Source code

Introduction

Here is the source code for TestCipher.java

Source

import java.awt.Point;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.util.HashSet;
import java.util.Random;
import java.util.Set;

import javax.crypto.Cipher;
import javax.crypto.CipherInputStream;
import javax.crypto.CipherOutputStream;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESKeySpec;

public class TestCipher {
    // Password must be at least 8 characters
    private static final String password = "zukowski";

    public static void main(String args[]) throws Exception {
        Set set = new HashSet();
        Random random = new Random();
        for (int i = 0; i < 10; i++) {
            Point point = new Point(random.nextInt(1000), random.nextInt(2000));
            set.add(point);
        }
        int last = random.nextInt(5000);

        // Create Key
        byte key[] = password.getBytes();
        DESKeySpec desKeySpec = new DESKeySpec(key);
        SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
        SecretKey secretKey = keyFactory.generateSecret(desKeySpec);

        // Create Cipher
        Cipher desCipher = Cipher.getInstance("DES/ECB/PKCS5Padding");
        desCipher.init(Cipher.ENCRYPT_MODE, secretKey);

        // Create stream
        FileOutputStream fos = new FileOutputStream("out.des");
        BufferedOutputStream bos = new BufferedOutputStream(fos);
        CipherOutputStream cos = new CipherOutputStream(bos, desCipher);
        ObjectOutputStream oos = new ObjectOutputStream(cos);

        // Write objects
        oos.writeObject(set);
        oos.writeInt(last);
        oos.flush();
        oos.close();

        // Change cipher mode
        desCipher.init(Cipher.DECRYPT_MODE, secretKey);

        // Create stream
        FileInputStream fis = new FileInputStream("out.des");
        BufferedInputStream bis = new BufferedInputStream(fis);
        CipherInputStream cis = new CipherInputStream(bis, desCipher);
        ObjectInputStream ois = new ObjectInputStream(cis);

        // Read objects
        Set set2 = (Set) ois.readObject();
        int last2 = ois.readInt();
        ois.close();

        // Compare original with what was read back
        int count = 0;
        if (set.equals(set2)) {
            System.out.println("Set1: " + set);
            System.out.println("Set2: " + set2);
            System.out.println("Sets are okay.");
            count++;
        }
        if (last == last2) {
            System.out.println("int1: " + last);
            System.out.println("int2: " + last2);
            System.out.println("ints are okay.");
            count++;
        }
        if (count != 2) {
            System.out.println("Problem during encryption/decryption");
        }
    }
}