| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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.apache.jasper.security; |
| |
| import org.apache.jasper.Constants; |
| |
| /** |
| * Util class for Security related operations. |
| */ |
| |
| public final class SecurityUtil{ |
| |
| private static final boolean packageDefinitionEnabled = |
| System.getProperty("package.definition") == null ? false : true; |
| |
| /** |
| * Return the <code>SecurityManager</code> only if Security is enabled AND |
| * package protection mechanism is enabled. |
| */ |
| public static boolean isPackageProtectionEnabled(){ |
| if (packageDefinitionEnabled && Constants.IS_SECURITY_ENABLED){ |
| return true; |
| } |
| return false; |
| } |
| |
| |
| /** |
| * Filter the specified message string for characters that are sensitive |
| * in HTML. This avoids potential attacks caused by including JavaScript |
| * codes in the request URL that is often reported in error messages. |
| * |
| * @param message The message string to be filtered |
| */ |
| public static String filter(String message) { |
| |
| if (message == null) |
| return (null); |
| |
| char content[] = new char[message.length()]; |
| message.getChars(0, message.length(), content, 0); |
| StringBuilder result = new StringBuilder(content.length + 50); |
| for (int i = 0; i < content.length; i++) { |
| switch (content[i]) { |
| case '<': |
| result.append("<"); |
| break; |
| case '>': |
| result.append(">"); |
| break; |
| case '&': |
| result.append("&"); |
| break; |
| case '"': |
| result.append("""); |
| break; |
| default: |
| result.append(content[i]); |
| } |
| } |
| return (result.toString()); |
| |
| } |
| |
| } |