/projects/netbeans-7.3/mercurial/src/org/netbeans/modules/mercurial/config/Scrambler.java
Java | 338 lines | 262 code | 11 blank | 65 comment | 6 complexity | 7c57fc9cbeecb69c17b26e6efbef82d8 MD5 | raw file
- /**
- * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
- *
- * Copyright 1997-2010 Oracle and/or its affiliates. All rights reserved.
- *
- * Oracle and Java are registered trademarks of Oracle and/or its affiliates.
- * Other names may be trademarks of their respective owners.
- *
- * The contents of this file are subject to the terms of either the GNU
- * General Public License Version 2 only ("GPL") or the Common
- * Development and Distribution License("CDDL") (collectively, the
- * "License"). You may not use this file except in compliance with the
- * License. You can obtain a copy of the License at
- * http://www.netbeans.org/cddl-gplv2.html
- * or nbbuild/licenses/CDDL-GPL-2-CP. See the License for the
- * specific language governing permissions and limitations under the
- * License. When distributing the software, include this License Header
- * Notice in each file and include the License file at
- * nbbuild/licenses/CDDL-GPL-2-CP. Oracle designates this
- * particular file as subject to the "Classpath" exception as provided
- * by Oracle in the GPL Version 2 section of the License file that
- * accompanied this code. If applicable, add the following below the
- * License Header, with the fields enclosed by brackets [] replaced by
- * your own identifying information:
- * "Portions Copyrighted [year] [name of copyright owner]"
- *
- * Contributor(s):
- *
- * The Original Software is the CVS Client Library.
- * The Initial Developer of the Original Software is Robert Greig.
- * Portions created by Robert Greig are Copyright (C) 2000.
- * All Rights Reserved.
- *
- * If you wish your version of this file to be governed by only the CDDL
- * or only the GPL Version 2, indicate your decision by adding
- * "[Contributor] elects to include this software in this distribution
- * under the [CDDL or GPL Version 2] license." If you do not indicate a
- * single choice of license, a recipient has the option to distribute
- * your version of this file under either the CDDL, the GPL Version 2 or
- * to extend the choice of license to its licensees as provided above.
- * However, if you add GPL Version 2 code and therefore, elected the GPL
- * Version 2 license, then the option applies only if the new code is
- * made subject to such option by the copyright holder.
- *
- * Contributor(s): Robert Greig.
- */
- package org.netbeans.modules.mercurial.config;
- import java.io.IOException;
- import org.netbeans.modules.proxy.Base64Encoder;
- /**
- * Scrambles text (the password) using the standard scheme described in the
- * CVS protocol version 1.10. This encoding is trivial and should not be
- * used for security, but rather as a mechanism for avoiding inadvertant
- * compromise.
- * @author Robert Greig, Tomas Stupka
- */
- public class Scrambler {
- /**
- * The mapping array
- */
- private int[] shifts;
- /**
- * The single instance of this class (Singleton design pattern)
- */
- public static Scrambler instance;
- /**
- * Do not instantiate the scrambler directly. Use the getInstance() method
- */
- private Scrambler() {
- int i;
- shifts = new int[256];
- for (i = 0; i < 32; ++i) {
- shifts[i] = i;
- }
- shifts[i++] = 114;
- shifts[i++] = 120;
- shifts[i++] = 53;
- shifts[i++] = 79;
- shifts[i++] = 96;
- shifts[i++] = 109;
- shifts[i++] = 72;
- shifts[i++] = 108;
- shifts[i++] = 70;
- shifts[i++] = 64;
- shifts[i++] = 76;
- shifts[i++] = 67;
- shifts[i++] = 116;
- shifts[i++] = 74;
- shifts[i++] = 68;
- shifts[i++] = 87;
- shifts[i++] = 111;
- shifts[i++] = 52;
- shifts[i++] = 75;
- shifts[i++] = 119;
- shifts[i++] = 49;
- shifts[i++] = 34;
- shifts[i++] = 82;
- shifts[i++] = 81;
- shifts[i++] = 95;
- shifts[i++] = 65;
- shifts[i++] = 112;
- shifts[i++] = 86;
- shifts[i++] = 118;
- shifts[i++] = 110;
- shifts[i++] = 122;
- shifts[i++] = 105;
- shifts[i++] = 41;
- shifts[i++] = 57;
- shifts[i++] = 83;
- shifts[i++] = 43;
- shifts[i++] = 46;
- shifts[i++] = 102;
- shifts[i++] = 40;
- shifts[i++] = 89;
- shifts[i++] = 38;
- shifts[i++] = 103;
- shifts[i++] = 45;
- shifts[i++] = 50;
- shifts[i++] = 42;
- shifts[i++] = 123;
- shifts[i++] = 91;
- shifts[i++] = 35;
- shifts[i++] = 125;
- shifts[i++] = 55;
- shifts[i++] = 54;
- shifts[i++] = 66;
- shifts[i++] = 124;
- shifts[i++] = 126;
- shifts[i++] = 59;
- shifts[i++] = 47;
- shifts[i++] = 92;
- shifts[i++] = 71;
- shifts[i++] = 115;
- shifts[i++] = 78;
- shifts[i++] = 88;
- shifts[i++] = 107;
- shifts[i++] = 106;
- shifts[i++] = 56;
- shifts[i++] = 36;
- shifts[i++] = 121;
- shifts[i++] = 117;
- shifts[i++] = 104;
- shifts[i++] = 101;
- shifts[i++] = 100;
- shifts[i++] = 69;
- shifts[i++] = 73;
- shifts[i++] = 99;
- shifts[i++] = 63;
- shifts[i++] = 94;
- shifts[i++] = 93;
- shifts[i++] = 39;
- shifts[i++] = 37;
- shifts[i++] = 61;
- shifts[i++] = 48;
- shifts[i++] = 58;
- shifts[i++] = 113;
- shifts[i++] = 32;
- shifts[i++] = 90;
- shifts[i++] = 44;
- shifts[i++] = 98;
- shifts[i++] = 60;
- shifts[i++] = 51;
- shifts[i++] = 33;
- shifts[i++] = 97;
- shifts[i++] = 62;
- shifts[i++] = 77;
- shifts[i++] = 84;
- shifts[i++] = 80;
- shifts[i++] = 85;
- shifts[i++] = 223;
- shifts[i++] = 225;
- shifts[i++] = 216;
- shifts[i++] = 187;
- shifts[i++] = 166;
- shifts[i++] = 229;
- shifts[i++] = 189;
- shifts[i++] = 222;
- shifts[i++] = 188;
- shifts[i++] = 141;
- shifts[i++] = 249;
- shifts[i++] = 148;
- shifts[i++] = 200;
- shifts[i++] = 184;
- shifts[i++] = 136;
- shifts[i++] = 248;
- shifts[i++] = 190;
- shifts[i++] = 199;
- shifts[i++] = 170;
- shifts[i++] = 181;
- shifts[i++] = 204;
- shifts[i++] = 138;
- shifts[i++] = 232;
- shifts[i++] = 218;
- shifts[i++] = 183;
- shifts[i++] = 255;
- shifts[i++] = 234;
- shifts[i++] = 220;
- shifts[i++] = 247;
- shifts[i++] = 213;
- shifts[i++] = 203;
- shifts[i++] = 226;
- shifts[i++] = 193;
- shifts[i++] = 174;
- shifts[i++] = 172;
- shifts[i++] = 228;
- shifts[i++] = 252;
- shifts[i++] = 217;
- shifts[i++] = 201;
- shifts[i++] = 131;
- shifts[i++] = 230;
- shifts[i++] = 197;
- shifts[i++] = 211;
- shifts[i++] = 145;
- shifts[i++] = 238;
- shifts[i++] = 161;
- shifts[i++] = 179;
- shifts[i++] = 160;
- shifts[i++] = 212;
- shifts[i++] = 207;
- shifts[i++] = 221;
- shifts[i++] = 254;
- shifts[i++] = 173;
- shifts[i++] = 202;
- shifts[i++] = 146;
- shifts[i++] = 224;
- shifts[i++] = 151;
- shifts[i++] = 140;
- shifts[i++] = 196;
- shifts[i++] = 205;
- shifts[i++] = 130;
- shifts[i++] = 135;
- shifts[i++] = 133;
- shifts[i++] = 143;
- shifts[i++] = 246;
- shifts[i++] = 192;
- shifts[i++] = 159;
- shifts[i++] = 244;
- shifts[i++] = 239;
- shifts[i++] = 185;
- shifts[i++] = 168;
- shifts[i++] = 215;
- shifts[i++] = 144;
- shifts[i++] = 139;
- shifts[i++] = 165;
- shifts[i++] = 180;
- shifts[i++] = 157;
- shifts[i++] = 147;
- shifts[i++] = 186;
- shifts[i++] = 214;
- shifts[i++] = 176;
- shifts[i++] = 227;
- shifts[i++] = 231;
- shifts[i++] = 219;
- shifts[i++] = 169;
- shifts[i++] = 175;
- shifts[i++] = 156;
- shifts[i++] = 206;
- shifts[i++] = 198;
- shifts[i++] = 129;
- shifts[i++] = 164;
- shifts[i++] = 150;
- shifts[i++] = 210;
- shifts[i++] = 154;
- shifts[i++] = 177;
- shifts[i++] = 134;
- shifts[i++] = 127;
- shifts[i++] = 182;
- shifts[i++] = 128;
- shifts[i++] = 158;
- shifts[i++] = 208;
- shifts[i++] = 162;
- shifts[i++] = 132;
- shifts[i++] = 167;
- shifts[i++] = 209;
- shifts[i++] = 149;
- shifts[i++] = 241;
- shifts[i++] = 153;
- shifts[i++] = 251;
- shifts[i++] = 237;
- shifts[i++] = 236;
- shifts[i++] = 171;
- shifts[i++] = 195;
- shifts[i++] = 243;
- shifts[i++] = 233;
- shifts[i++] = 253;
- shifts[i++] = 240;
- shifts[i++] = 194;
- shifts[i++] = 250;
- shifts[i++] = 191;
- shifts[i++] = 155;
- shifts[i++] = 142;
- shifts[i++] = 137;
- shifts[i++] = 245;
- shifts[i++] = 235;
- shifts[i++] = 163;
- shifts[i++] = 242;
- shifts[i++] = 178;
- shifts[i++] = 152;
- }
- /**
- * Get an instance of the standard scrambler
- */
- public static Scrambler getInstance() {
- if (instance == null) {
- instance = new Scrambler();
- }
- return instance;
- }
- public String descramble(String scrambledText) {
- StringBuffer buf = new StringBuffer();
- if (scrambledText != null) {
- byte[] decoded = decode(scrambledText);
- for (int i = 1; i < decoded.length; ++i) {
- buf.append(scramble((char)decoded[i]));
- }
- }
- return buf.toString();
- }
-
- private char scramble(char ch) {
- int i = ( shifts[ (((int) ch) & 0xFF) & 255] & 255 ) &
- ( shifts[ (((int) ch) & 0x00FF) & 255] & 255 );
- return Character.toChars(i)[0];
- }
-
- private byte[] decode(String str) {
- return Base64Encoder.decode(str);
- }
- }