1 //////////////////////////////////////////////////////////////////////////////
2 // dexterIM - Instant Messaging Framework
3 // Copyright (C) 2003 Christoph Walcher
4 //
5 // This program is free software; you can redistribute it and/or modify
6 // it under the terms of the GNU General Public License as published by
7 // the Free Software Foundation; either version 2 of the License, or
8 // (at your option) any later version.
9 //
10 // This program is distributed in the hope that it will be useful,
11 // but WITHOUT ANY WARRANTY; without even the implied warranty of
12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 // GNU General Public License for more details.
14 //
15 // You should have received a copy of the GNU General Public License
16 // along with this program; if not, write to the Free Software
17 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 //////////////////////////////////////////////////////////////////////////////
19 package net.sf.dexterim.oscar.util;
20
21 /***
22 * @author christoph
23 * TODO Document
24 */
25 public final class PasswordRoaster {
26 private static PasswordRoaster instance;
27
28 private static final int[] roaster = {
29 0xF3, 0x26, 0x81, 0xC4,
30 0x39, 0x86, 0xDB, 0x92,
31 0x71, 0xA3, 0xB9, 0xE6,
32 0x53, 0x7A, 0x95, 0x7C
33 };
34
35 private PasswordRoaster() {
36 }
37
38 public int[] roast(String password) {
39
40 byte tmp[] = password.getBytes();
41
42 int returnValue[] = new int[tmp.length];
43
44
45 for (int i=0; i<tmp.length; i++) {
46 int entry = (tmp[i] & 0xFF);
47
48 returnValue[i] = (entry ^ roaster[i % roaster.length]);
49 }
50
51 return returnValue;
52 }
53
54 public static synchronized PasswordRoaster getInstance() {
55 if (instance == null) {
56 instance = new PasswordRoaster();
57 }
58
59 return instance;
60 }
61 }