MainClass.java Source code

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Here is the source code for MainClass.java

Source

import java.security.Key;

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

public class MainClass {
    public static void main(String[] args) throws Exception {
        KeyGenerator kg = KeyGenerator.getInstance("DESede");
        Key sharedKey = kg.generateKey();

        String password = "password";
        byte[] salt = "salt1234".getBytes();
        PBEParameterSpec paramSpec = new PBEParameterSpec(salt, 20);
        PBEKeySpec keySpec = new PBEKeySpec(password.toCharArray());
        SecretKeyFactory kf = SecretKeyFactory.getInstance("PBEWithMD5AndDES");
        SecretKey passwordKey = kf.generateSecret(keySpec);
        Cipher c = Cipher.getInstance("PBEWithMD5AndDES");
        c.init(Cipher.WRAP_MODE, passwordKey, paramSpec);
        byte[] wrappedKey = c.wrap(sharedKey);

        c = Cipher.getInstance("DESede");
        c.init(Cipher.ENCRYPT_MODE, sharedKey);
        byte[] input = "input".getBytes();
        byte[] encrypted = c.doFinal(input);

        c = Cipher.getInstance("PBEWithMD5AndDES");

        c.init(Cipher.UNWRAP_MODE, passwordKey, paramSpec);
        Key unwrappedKey = c.unwrap(wrappedKey, "DESede", Cipher.SECRET_KEY);

        c = Cipher.getInstance("DESede");
        c.init(Cipher.DECRYPT_MODE, unwrappedKey);
        System.out.println(new String(c.doFinal(encrypted)));
    }
}