/*
 * JBoss.java - Blowfish encryption/decryption tool with JBoss default password
 *    Daniel Martin Gomez <daniel@ngssoftware.com> - 03/Sep/2009
 *
 * This file may be used under the terms of the GNU General Public License 
 * version 2.0 as published by the Free Software Foundation:
 *   http://www.gnu.org/licenses/gpl-2.0.html
 */
import javax.crypto.*;
import javax.crypto.spec.SecretKeySpec;

import java.math.BigInteger;

public class JBoss 
{

  public static void main(String[] args) throws Exception
  {

    if ( ( args.length != 2 ) || !( args[0].equals("-e") | args[0].equals("-d") ) )
    {
      System.out.println( "Usage:\n\tjava JBoss <-e|-d> <encrypted_password>" );
      return;
    }
    
    String mode = args[0];

    byte[] kbytes = "jaas is the way".getBytes(); 
    SecretKeySpec key = new SecretKeySpec(kbytes, "Blowfish"); 
    Cipher cipher = Cipher.getInstance("Blowfish"); 

    String out = null;

    if ( mode.equals("-e") )
    {
      String secret = args[1];
      cipher.init(Cipher.ENCRYPT_MODE, key); 
      byte[] encoding = cipher.doFinal(secret.getBytes()); 
      out = new BigInteger(encoding).toString(16); 
    } 
    else
    {
      BigInteger secret = new BigInteger(args[1], 16);
      cipher.init(Cipher.DECRYPT_MODE, key);
      byte[] encoding = cipher.doFinal(secret.toByteArray()); 
      out = new String(encoding);
    }
    System.out.println( out );
  }
}