| /* |
| * Copyright (c) 2005, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package com.sun.script.javascript; |
| |
| import java.util.*; |
| import sun.org.mozilla.javascript.internal.*; |
| |
| /** |
| * This class prevents script access to certain sensitive classes. |
| * Note that this class checks over and above SecurityManager. i.e., although |
| * a SecurityManager would pass, class shutter may still prevent access. |
| * |
| * @author A. Sundararajan |
| * @since 1.6 |
| */ |
| final class RhinoClassShutter implements ClassShutter { |
| private static Map<String, Boolean> protectedClasses; |
| private static RhinoClassShutter theInstance; |
| |
| private RhinoClassShutter() { |
| } |
| |
| static synchronized ClassShutter getInstance() { |
| if (theInstance == null) { |
| theInstance = new RhinoClassShutter(); |
| protectedClasses = new HashMap<String, Boolean>(); |
| |
| // For now, we just have AccessController. Allowing scripts |
| // to this class will allow it to execute doPrivileged in |
| // bootstrap context. We can add more classes for other reasons. |
| protectedClasses.put("java.security.AccessController", Boolean.TRUE); |
| } |
| return theInstance; |
| } |
| |
| public boolean visibleToScripts(String fullClassName) { |
| // first do the security check. |
| SecurityManager sm = System.getSecurityManager(); |
| if (sm != null) { |
| int i = fullClassName.lastIndexOf("."); |
| if (i != -1) { |
| try { |
| sm.checkPackageAccess(fullClassName.substring(0, i)); |
| } catch (SecurityException se) { |
| return false; |
| } |
| } |
| } |
| // now, check is it a protected class. |
| return protectedClasses.get(fullClassName) == null; |
| } |
| } |