import java.io.UnsupportedEncodingException;
import java.security.*;

import javax.crypto.*;

import org.bouncycastle.jce.provider.BouncyCastleProvider;


public class Test2 {

    public static void main (String[] args) throws NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeyException, UnsupportedEncodingException, IllegalBlockSizeException, BadPaddingException{

        BouncyCastleProvider provider = new BouncyCastleProvider();

        byte[] testo = "Gattino".getBytes("UTF8");

        KeyGenerator keyGenerator = KeyGenerator.getInstance("DESede", provider);
        keyGenerator.init(168);
        Key chiave = keyGenerator.generateKey();

        Cipher cifrario= Cipher.getInstance("DESede/ECB/PKCS5Padding", provider) ;
        cifrario.init(Cipher.ENCRYPT_MODE, chiave);

        System.out.println("Testo in chiaro: " + new String(testo));
        for (int i =0; i< testo.length; i++)
            System.out.print(Integer.toHexString((int)testo[i]) + " ");

        byte[] testo_cifrato = cifrario.doFinal(testo);

        System.out.println("\nTesto cifrato: ");
        for (int i =0; i< testo_cifrato.length; i++)
            System.out.print(Integer.toHexString((int)testo_cifrato[i]) + " ");

        cifrario.init(Cipher.DECRYPT_MODE, chiave);
        byte[] testo_decifrato = cifrario.doFinal(testo_cifrato);

        String output = new String(testo_decifrato,"UTF8");
        System.out.println("\nTesto decifrato: "+output);

    }
}