1 /**
2 * This file Copyright (c) 2012-2013 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 final class EscapeUtil {
42
43 private EscapeUtil() {
44 }
45
46 public static String escapeXss(String str) {
47 return escape(unescapeXss(str));
48 }
49
50 public static String unescapeXss(String str) {
51 return str == null ? null : str.replace("&", "&").replace(""", "\"").replace("<", "<").replace(">", ">");
52 }
53
54 public static String[] escapeXss(String[] str) {
55 if (str == null) {
56 return null;
57 }
58 String[] retValue = new String[str.length];
59 for(int i = 0; i < retValue.length; i++) {
60 retValue[i] = escapeXss(str[i]);
61 }
62 return retValue;
63 }
64
65 public static String[] unescapeXss(String[] str) {
66 if (str == null) {
67 return null;
68 }
69 String[] retValue = new String[str.length];
70 for(int i = 0; i < retValue.length; i++) {
71 retValue[i] = unescapeXss(str[i]);
72 }
73 return retValue;
74 }
75
76 private static String escape(String str) {
77 return str == null ? null : str.replace("&", "&").replace("\"", """).replace("<", "<").replace(">", ">");
78 }
79 }