J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2005 Sun Microsystems, Inc. All Rights Reserved. |
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 | * |
| 5 | * This code is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of the GNU General Public License version 2 only, as |
| 7 | * published by the Free Software Foundation. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun in the LICENSE file that accompanied this code. |
| 10 | * |
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 14 | * version 2 for more details (a copy is included in the LICENSE file that |
| 15 | * accompanied this code). |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License version |
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, |
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| 20 | * |
| 21 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any questions. |
| 24 | */ |
| 25 | |
| 26 | package com.sun.script.javascript; |
| 27 | |
| 28 | import java.util.*; |
| 29 | import sun.org.mozilla.javascript.internal.*; |
| 30 | |
| 31 | /** |
| 32 | * This class prevents script access to certain sensitive classes. |
| 33 | * Note that this class checks over and above SecurityManager. i.e., although |
| 34 | * a SecurityManager would pass, class shutter may still prevent access. |
| 35 | * |
| 36 | * @author A. Sundararajan |
| 37 | * @since 1.6 |
| 38 | */ |
| 39 | final class RhinoClassShutter implements ClassShutter { |
| 40 | private static Map<String, Boolean> protectedClasses; |
| 41 | private static RhinoClassShutter theInstance; |
| 42 | |
| 43 | private RhinoClassShutter() { |
| 44 | } |
| 45 | |
| 46 | static synchronized ClassShutter getInstance() { |
| 47 | if (theInstance == null) { |
| 48 | theInstance = new RhinoClassShutter(); |
| 49 | protectedClasses = new HashMap<String, Boolean>(); |
| 50 | |
| 51 | // For now, we just have AccessController. Allowing scripts |
| 52 | // to this class will allow it to execute doPrivileged in |
| 53 | // bootstrap context. We can add more classes for other reasons. |
| 54 | protectedClasses.put("java.security.AccessController", Boolean.TRUE); |
| 55 | } |
| 56 | return theInstance; |
| 57 | } |
| 58 | |
| 59 | public boolean visibleToScripts(String fullClassName) { |
| 60 | // first do the security check. |
| 61 | SecurityManager sm = System.getSecurityManager(); |
| 62 | if (sm != null) { |
| 63 | int i = fullClassName.lastIndexOf("."); |
| 64 | if (i != -1) { |
| 65 | try { |
| 66 | sm.checkPackageAccess(fullClassName.substring(0, i)); |
| 67 | } catch (SecurityException se) { |
| 68 | return false; |
| 69 | } |
| 70 | } |
| 71 | } |
| 72 | // now, check is it a protected class. |
| 73 | return protectedClasses.get(fullClassName) == null; |
| 74 | } |
| 75 | } |