/*********************************************************************************
 *  TotalCross Software Development Kit                                          *
 *  Copyright (C) 2000-2012 SuperWaba Ltda.                                      *
 *  All Rights Reserved                                                          *
 *                                                                               *
 *  This library and virtual machine is distributed in the hope that it will     *
 *  be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of    *
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.                         *
 *                                                                               *
 *********************************************************************************/



package tc.samples.api.crypto;

import tc.samples.api.*;

import totalcross.crypto.*;
import totalcross.crypto.digest.*;
import totalcross.sys.*;
import totalcross.ui.*;
import totalcross.ui.event.*;

public class DigestSample extends BaseContainer
{
   private Edit edtInput;
   private ComboBox cboDigests;
   private Button btnGo;
   private Object[] comboItems;
   
   public DigestSample()
   {
      try
      {
         comboItems = new Object[] {new MD5Digest(), new SHA1Digest(), new SHA256Digest()};
      }
      catch (NoSuchAlgorithmException e)
      {
         e.printStackTrace();
      }
   }
   
   public void initUI()
   {
      super.initUI();
      edtInput = new Edit();
      edtInput.setText("0123456789ABCDEF");
      cboDigests = new ComboBox(comboItems);
      cboDigests.setSelectedIndex(0);
      btnGo = new Button(" Go! ");
      
      add(edtInput, LEFT + 2, TOP + fmH/4, FILL - (btnGo.getPreferredWidth() + cboDigests.getPreferredWidth() + 6), PREFERRED);
      add(cboDigests, AFTER + 2, SAME, PREFERRED, PREFERRED);
      add(btnGo, AFTER + 2, SAME, PREFERRED, PREFERRED);
      addLog(LEFT + 2, AFTER + 2, FILL - 2, FILL - 2,null);
   }
   
   public void onEvent(Event e)
   {
      switch (e.type)
      {
         case ControlEvent.PRESSED:
            if (e.target == btnGo)
            {
               Digest alg = (Digest)cboDigests.getSelectedItem();
               String message = edtInput.getText();
               
               alg.reset();
               alg.update(message.getBytes());
               byte[] digest = alg.getDigest();
               
               log("Message: " + message);
               log("Digest: " + Convert.bytesToHexString(digest) + " (" + digest.length + " bytes)");
               log("=========================");
            }
            break;
      }
   }
}