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/*-
* ================================================================================
* eCOMP Portal SDK
* ================================================================================
* Copyright (C) 2017 AT&T Intellectual Property
* ================================================================================
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
* ================================================================================
*/
package org.openecomp.portalsdk.analytics.util;
/**
*
* This class is used to filter javascript tags to avoid XSS attacks.
*/
public class XSSFilter {
// private static String[] filterChars = { "<", ">", "<", ">", "\"", "\\", "0x" };
// private static String[] replacementChars = { " ", " ", " ", " ", "'", "/", "0 x" };
/* public static synchronized String filterRequest(String param) {
String value = param;
if (param != null) {
for (int i = 0; i < filterChars.length; i++) {
value = filterCharacters(filterChars[i], replacementChars[i],
value);
}
}
return value;
}
*/
public static synchronized String filterRequestOnlyScript(String param) {
String value = "";
value = nvl(param);
value = value.replaceAll("<[\\s]*[sS][\\s]*[cC][\\s]*[rR][\\s]*[iI][\\s]*[pP][\\s]*[tT][\\s]*>", "");
value = value.replaceAll("</[\\s]*[sS][\\s]*[cC][\\s]*[rR][\\s]*[iI][\\s]*[pP][\\s]*[tT][\\s]*>", "");
value = value.replaceAll("[\\s]*[jJ][\\s]*[aA][\\s]*[vV][\\s]*[aA][\\s]*[sS][\\s]*[cC][\\s]*[rR][\\s]*[iI][\\s]*[pP][\\s]*[tT][\\s]*", "");
return value;
}
public static synchronized String filterRequest (String param) {
String value = "";
value = nvl(param);
value = value.replaceAll("<[\\s]*[sS][\\s]*[cC][\\s]*[rR][\\s]*[iI][\\s]*[pP][\\s]*[tT][\\s]*>", "");
value = value.replaceAll("</[\\s]*[sS][\\s]*[cC][\\s]*[rR][\\s]*[iI][\\s]*[pP][\\s]*[tT][\\s]*>", "");
value = value.replaceAll("[\\s]*[jJ][\\s]*[aA][\\s]*[vV][\\s]*[aA][\\s]*[sS][\\s]*[cC][\\s]*[rR][\\s]*[iI][\\s]*[pP][\\s]*[tT][\\s]*", "");
value = value.replaceAll("[\\s]*<", "");
value = value.replaceAll("[\\s]*>", "");
return value;
}
// private static synchronized String filterCharacters(String originalChar, String newChar,
// String param) {
// StringBuffer sb = new StringBuffer(param);
//
// for (int position = param.toLowerCase().indexOf(originalChar); position >= 0;) {
// sb.replace(position, position + originalChar.length(), newChar);
// param = sb.toString();
// position = param.toLowerCase().indexOf(originalChar);
// }
//
// return sb.toString();
// }
public static void main (String args[]) {
String value = XSSFilter.filterRequest("<s\nC\nr\nI\np\nT\n>\na\nl\ne\nr\nt\n('sundar');</SCRIPT>javascript:alert('Sundar');");
int i = Integer.parseInt("8989");
System.out.println(value);
}
private static String nvl(String s) {
return (s == null) ? "" : s;
}
}
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