MainClass.java Source code

Introduction

Here is the source code for MainClass.java

Source

import java.util.Random;

import javax.crypto.Cipher;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.PBEKeySpec;
import javax.crypto.spec.PBEParameterSpec;

import sun.misc.BASE64Encoder;

public class MainClass {

    public static void main(String[] args) throws Exception {
        System.out.println(encrypt(new char[] { 'a', 'b', 'c', 'd' }, "plaintext1234567890"));
    }

    private static String encrypt(char[] password, String plaintext) throws Exception {

        byte[] salt = new byte[8];
        Random random = new Random();
        random.nextBytes(salt);

        PBEKeySpec keySpec = new PBEKeySpec(password);

        SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("PBEWithSHAAndTwofish-CBC");

        SecretKey key = keyFactory.generateSecret(keySpec);

        PBEParameterSpec paramSpec = new PBEParameterSpec(salt, 1000);

        Cipher cipher = Cipher.getInstance("PBEWithSHAAndTwofish-CBC");
        cipher.init(Cipher.ENCRYPT_MODE, key, paramSpec);

        byte[] ciphertext = cipher.doFinal(plaintext.getBytes());

        BASE64Encoder encoder = new BASE64Encoder();

        String saltString = encoder.encode(salt);
        String ciphertextString = encoder.encode(ciphertext);

        return saltString + ciphertextString;
    }

}