content: /*
   * IzPack - Copyright 2001-2005 Julien Ponge, All Rights Reserved.
   * 
   * http://izpack.org/
   * http://izpack.codehaus.org/
   * 
   * Copyright 2003 Elmar Grom
   * 
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   * 
   *     http://www.apache.org/licenses/LICENSE-2.0
   *     
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package   com.izforge.izpack.sample;
  
  import    com.izforge.izpack.panels.*;
  
  /*---------------------------------------------------------------------------*/
  /**
   * This class provides a demonstration for using an encryption service in
   * connection with a password field, as used in a <code>UserInputPanel</code>.
   *
   * @version  0.0.1 / 02/19/03
   * @author   Elmar Grom
   */
  /*---------------------------------------------------------------------------*/
  public class PWDEncryptor implements Processor
  {
   /*--------------------------------------------------------------------------*/
   /**
    * Encrypts the a password and returns the encrypted result. <br>
    * <b>Note:</b> this is not a real encryption algorithm. The code only
    * demonstrates the use of this interface in a real installation environment.
    * For a real application a proper encryption mechanism must be used. Though
    * Java 1.4.X provides such algorithms, you need to consider that not all
    * potential target environments have this version installed. It seems best
    * to include the necessary encryption library with the installer.
    *
    * @param     client   the client object using the services of this encryptor.
    *
    * @return    the encryption result.
    */
   /*--------------------------------------------------------------------------*/
    public String process (ProcessingClient client)
    {
      if (client.getNumFields () < 1)
      {
        return ("");
      }
      
      char [] password = client.getFieldContents (0).toCharArray ();
      char [] result   = new char [password.length];
      int  temp;
      
      for (int i = 0; i < password.length; i++)
      {
        temp = password [i] - 57;
        if (i > 0)
        {
          temp = temp + password [i - 1];
        }
  
        if ((temp % 3) == 0)
        {
          temp = temp + 13;
        }
        if (temp < 0)
        {
          temp = temp + 193;
        }
      
        result [i] = (char)temp;
      }
  
      return (new String (result));
    }
  }
  /*---------------------------------------------------------------------------*/
  