import java.io.*;
import java.security.*;
import java.math.*;
import xjava.security.Cipher;
import cryptix.util.core.BI;
import cryptix.util.core.ArrayUtil;
import cryptix.util.core.Hex;
import cryptix.provider.key.*;


class tripleDES {

public static void main (String[] args) {

try {
	//add a security provider
	
	java.security.Security.addProvider(new cryptix.provider.Cryptix());
	
	// RawSecretKey implements a secret key in raw format. 
	//RawKeyGenerator creates keys that are instances of this class.
	
	// parametros ("algoritmo", "chave em hexadecimal")
	RawSecretKey key2 =
		new RawSecretKey("DES-EDE3",Hex.fromString("3812A419C63BE771AD9F61FEFA20CE633812A419C63BE771"));

	//	Use the following line instead for DES encryption
	//	RawSecretKey key2 = new	RawSecretKey("DES",Hex.fromString("3812A419C63BE771"));
	
	//     Returns:   a copy of the raw-encoded key data
	byte[] yval = key2.getEncoded();
	System.out.println("\n********************************************************");
	System.out.println("Yval = "+yval.toString());
	
	
	BigInteger Bkey = new BigInteger(yval);
	
	//Dump a BigInteger as a string, in a format that is easy to read for debugging purposes. 
	//The string m is prepended to the start of each line.
	String w = cryptix.util.core.BI.dumpString(Bkey);
	System.out.println("\n********************************************************");
	System.out.println("The Encryption Key = " + w);

	//retorna um objeto Cipher que implementa a cifra fornecida pelo fornecido provedor
	Cipher des= Cipher.getInstance("DES-EDE3/ECB/NONE","Cryptix");

	//inicializa a encriptação com a chave fornecida.
	des.initEncrypt(key2);
	
	//encripta
	byte[] ciphertext =
		des.crypt(Hex.fromString("01010101010101010102030405060708090A0B0C0D0E0F101112131415161718"));

	System.out.println("\n********************************************************");
	System.out.println("ciphertext.length = " + ciphertext.length);

	
	BigInteger Bciph = new BigInteger(ciphertext);
	w = cryptix.util.core.BI.dumpString(Bciph);

	System.out.println("\n********************************************************");
	System.out.println("Ciphertext for simple encryption = " + w);



	//decrypt ciphertext 
	des.initDecrypt(key2);
	ciphertext = des.crypt(ciphertext);
	System.out.println("\n********************************************************");
	System.out.println("plaintext.length = " + ciphertext.length);

	// print out representation of decrypted ciphertext 
	Bciph = new BigInteger(ciphertext);
	w = cryptix.util.core.BI.dumpString(Bciph);
	System.out.println("\n********************************************************");
	System.out.println("Plaintext for simple encryption = " + w);

      } catch (Exception e) {
            System.err.println("Caught exception " + e.toString());
      }

}}