1 /**
2 * This file Copyright (c) 2012 Magnolia International
3 * Ltd. (http://www.magnolia-cms.com). All rights reserved.
4 *
5 *
6 * This file is dual-licensed under both the Magnolia
7 * Network Agreement and the GNU General Public License.
8 * You may elect to use one or the other of these licenses.
9 *
10 * This file is distributed in the hope that it will be
11 * useful, but AS-IS and WITHOUT ANY WARRANTY; without even the
12 * implied warranty of MERCHANTABILITY or FITNESS FOR A
13 * PARTICULAR PURPOSE, TITLE, or NONINFRINGEMENT.
14 * Redistribution, except as permitted by whichever of the GPL
15 * or MNA you select, is prohibited.
16 *
17 * 1. For the GPL license (GPL), you can redistribute and/or
18 * modify this file under the terms of the GNU General
19 * Public License, Version 3, as published by the Free Software
20 * Foundation. You should have received a copy of the GNU
21 * General Public License, Version 3 along with this program;
22 * if not, write to the Free Software Foundation, Inc., 51
23 * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
24 *
25 * 2. For the Magnolia Network Agreement (MNA), this file
26 * and the accompanying materials are made available under the
27 * terms of the MNA which accompanies this distribution, and
28 * is available at http://www.magnolia-cms.com/mna.html
29 *
30 * Any modifications to this file must keep this entire header
31 * intact.
32 *
33 */
34 package info.magnolia.util;
35
36 /**
37 * <p>Utilities to escaping characters for preventing XSS attack.</p>
38 * <p>This class escapes only & (&), "("), <(<), >(>) characters, but doesn't escape others characters.</p>
39 * <p>Use when StringEscapeUtils cannot be used because of escaping more or less character entities.</p>
40 */
41 public class EscapeUtil {
42
43 public static String escapeXss(String str) {
44 return str == null ? null : str.replace("&", "&").replace("\"", """).replace("<", "<").replace(">", ">");
45 }
46
47 public static String[] escapeXss(String[] str) {
48 if (str == null) {
49 return null;
50 }
51 String[] retValue = new String[str.length];
52 for(int i = 0; i < retValue.length; i++) {
53 retValue[i] = escapeXss(unescapeXss(str[i]));
54 }
55 return retValue;
56 }
57
58 public static String unescapeXss(String str) {
59 return str == null ? null : str.replace("&", "&").replace(""", "\"").replace("<", "<").replace(">", ">");
60 }
61
62 public static String[] unescapeXss(String[] str) {
63 if (str == null) {
64 return null;
65 }
66 String[] retValue = new String[str.length];
67 for(int i = 0; i < retValue.length; i++) {
68 retValue[i] = unescapeXss(str[i]);
69 }
70 return retValue;
71 }
72 }