1 //Copyright (C) 2004, Brian Enigma <enigma at netninja.com>
2 //This file is part of MagicCodes.
3 //
4 //MagicCodes is free software; you can redistribute it and/or modify
5 //it under the terms of the GNU General Public License as published by
6 //the Free Software Foundation; either version 2 of the License, or
7 //(at your option) any later version.
8 //
9 //MagicCodes is distributed in the hope that it will be useful,
10 //but WITHOUT ANY WARRANTY; without even the implied warranty of
11 //MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 //GNU General Public License for more details.
13 //
14 //You should have received a copy of the GNU General Public License
15 //along with Foobar; if not, write to the Free Software
16 //Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17 package org.ninjasoft.magiccodes.plugins;
18
19 /***
20 * The Texel code from the MU arg. In this representation, the first byte is
21 * plaintext. It gets XORed with the next byte, etc.
22 *
23 * Sample data 1:
24 * 741116071d0709470844030e050d07094743110b09041b1c10111b19045446091d52531606160717455406130f1d1e041a001a060147
25 *
26 * Sample data 2:
27 * 771e070a480c52130807420c42101b0e0f1c5453061b400e4809131644541b4f5316004b0e4302041612135e0c43020f495354440b4f4d18160b484e0118590e4e0b13131752531b071a1908444809171345430c02084b0e571e05004c54060b59541b4f55051c030e054441050010184c4405151541490f4643020f
28 * @author enigma
29 */
30 public class TexelCode implements Plugin {
31 public String getName() {
32 return "Texel Decode";
33 }
34 public String getDescription() {
35 return "The chaining XOR code Texel used in MU";
36 }
37 public boolean usesKey() {
38 return false;
39 }
40 public boolean isInformational() {
41 return false;
42 }
43 public int[] doAction(int[] in, int[] key) {
44 int previous = 0;
45 for (int i=0; i<in.length; i++) {
46 int newValue = (in[i] ^ previous) % 256;
47 previous = newValue;
48 in[i] = newValue;
49 }
50 return in;
51 }
52 }
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