01: /*
02: * IzPack - Copyright 2001-2008 Julien Ponge, All Rights Reserved.
03: *
04: * http://izpack.org/
05: * http://izpack.codehaus.org/
06: *
07: * Copyright 2003 Elmar Grom
08: *
09: * Licensed under the Apache License, Version 2.0 (the "License");
10: * you may not use this file except in compliance with the License.
11: * You may obtain a copy of the License at
12: *
13: * http://www.apache.org/licenses/LICENSE-2.0
14: *
15: * Unless required by applicable law or agreed to in writing, software
16: * distributed under the License is distributed on an "AS IS" BASIS,
17: * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
18: * See the License for the specific language governing permissions and
19: * limitations under the License.
20: */
21:
22: package com.izforge.izpack.sample;
23:
24: import com.izforge.izpack.panels.ProcessingClient;
25: import com.izforge.izpack.panels.Processor;
26:
27: /*---------------------------------------------------------------------------*/
28: /**
29: * This class provides a demonstration for using an encryption service in
30: * connection with a password field, as used in a <code>UserInputPanel</code>.
31: *
32: * @version 0.0.1 / 02/19/03
33: * @author Elmar Grom
34: */
35: /*---------------------------------------------------------------------------*/
36: public class PWDEncryptor implements Processor {
37: /*--------------------------------------------------------------------------*/
38: /**
39: * Encrypts the a password and returns the encrypted result. <br>
40: * <b>Note:</b> this is not a real encryption algorithm. The code only
41: * demonstrates the use of this interface in a real installation environment.
42: * For a real application a proper encryption mechanism must be used. Though
43: * Java 1.4.X provides such algorithms, you need to consider that not all
44: * potential target environments have this version installed. It seems best
45: * to include the necessary encryption library with the installer.
46: *
47: * @param client the client object using the services of this encryptor.
48: *
49: * @return the encryption result.
50: */
51: /*--------------------------------------------------------------------------*/
52: public String process(ProcessingClient client) {
53: if (client.getNumFields() < 1) {
54: return ("");
55: }
56:
57: char[] password = client.getFieldContents(0).toCharArray();
58: char[] result = new char[password.length];
59: int temp;
60:
61: for (int i = 0; i < password.length; i++) {
62: temp = password[i] - 57;
63: if (i > 0) {
64: temp += password[i - 1];
65: }
66:
67: if ((temp % 3) == 0) {
68: temp += 13;
69: }
70: if (temp < 0) {
71: temp += 193;
72: }
73:
74: result[i] = (char) temp;
75: }
76:
77: return (new String(result));
78: }
79: }
80: /*---------------------------------------------------------------------------*/
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