001/* 002 * IzPack - Copyright 2001-2005 Julien Ponge, All Rights Reserved. 003 * 004 * http://www.izforge.com/izpack/ 005 * http://developer.berlios.de/projects/izpack/ 006 * 007 * Copyright 2003 Elmar Grom 008 * 009 * Licensed under the Apache License, Version 2.0 (the "License"); 010 * you may not use this file except in compliance with the License. 011 * You may obtain a copy of the License at 012 * 013 * http://www.apache.org/licenses/LICENSE-2.0 014 * 015 * Unless required by applicable law or agreed to in writing, software 016 * distributed under the License is distributed on an "AS IS" BASIS, 017 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 018 * See the License for the specific language governing permissions and 019 * limitations under the License. 020 */ 021 022package com.izforge.izpack.sample; 023 024import com.izforge.izpack.panels.ProcessingClient; 025import com.izforge.izpack.panels.Processor; 026 027/*---------------------------------------------------------------------------*/ 028/** 029 * This class provides a demonstration for using an encryption service in 030 * connection with a password field, as used in a <code>UserInputPanel</code>. 031 * 032 * @version 0.0.1 / 02/19/03 033 * @author Elmar Grom 034 */ 035/*---------------------------------------------------------------------------*/ 036public class PWDEncryptor implements Processor 037{ 038 /*--------------------------------------------------------------------------*/ 039 /** 040 * Encrypts the a password and returns the encrypted result. <br> 041 * <b>Note:</b> this is not a real encryption algorithm. The code only 042 * demonstrates the use of this interface in a real installation environment. 043 * For a real application a proper encryption mechanism must be used. Though 044 * Java 1.4.X provides such algorithms, you need to consider that not all 045 * potential target environments have this version installed. It seems best 046 * to include the necessary encryption library with the installer. 047 * 048 * @param client the client object using the services of this encryptor. 049 * 050 * @return the encryption result. 051 */ 052 /*--------------------------------------------------------------------------*/ 053 public String process (ProcessingClient client) 054 { 055 if (client.getNumFields () < 1) 056 { 057 return (""); 058 } 059 060 char [] password = client.getFieldContents (0).toCharArray (); 061 char [] result = new char [password.length]; 062 int temp; 063 064 for (int i = 0; i < password.length; i++) 065 { 066 temp = password [i] - 57; 067 if (i > 0) 068 { 069 temp = temp + password [i - 1]; 070 } 071 072 if ((temp % 3) == 0) 073 { 074 temp = temp + 13; 075 } 076 if (temp < 0) 077 { 078 temp = temp + 193; 079 } 080 081 result [i] = (char)temp; 082 } 083 084 return (new String (result)); 085 } 086} 087/*---------------------------------------------------------------------------*/