J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2003 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 java.lang.management; |
| 27 | |
| 28 | /** |
| 29 | * The permission which the SecurityManager will check when code |
| 30 | * that is running with a SecurityManager calls methods defined |
| 31 | * in the management interface for the Java platform. |
| 32 | * <P> |
| 33 | * The following table |
| 34 | * provides a summary description of what the permission allows, |
| 35 | * and discusses the risks of granting code the permission. |
| 36 | * <P> |
| 37 | * |
| 38 | * <table border=1 cellpadding=5 summary="Table shows permission target name, wh |
| 39 | at the permission allows, and associated risks"> |
| 40 | * <tr> |
| 41 | * <th>Permission Target Name</th> |
| 42 | * <th>What the Permission Allows</th> |
| 43 | * <th>Risks of Allowing this Permission</th> |
| 44 | * </tr> |
| 45 | * |
| 46 | * <tr> |
| 47 | * <td>control</td> |
| 48 | * <td>Ability to control the runtime characteristics of the Java virtual |
| 49 | * machine, for example, setting the -verbose:gc and -verbose:class flag, |
| 50 | * setting the threshold of a memory pool, and enabling and disabling |
| 51 | * the thread contention monitoring support. |
| 52 | * </td> |
| 53 | * <td>This allows an attacker to control the runtime characteristics |
| 54 | * of the Java virtual machine and cause the system to misbehave. |
| 55 | * </td> |
| 56 | * </tr> |
| 57 | * <tr> |
| 58 | * <td>monitor</td> |
| 59 | * <td>Ability to retrieve runtime information about |
| 60 | * the Java virtual machine such as thread |
| 61 | * stack trace, a list of all loaded class names, and input arguments |
| 62 | * to the Java virtual machine.</td> |
| 63 | * <td>This allows malicious code to monitor runtime information and |
| 64 | * uncover vulnerabilities.</td> |
| 65 | * </tr> |
| 66 | * |
| 67 | * </table> |
| 68 | * |
| 69 | * <p> |
| 70 | * Programmers do not normally create ManagementPermission objects directly. |
| 71 | * Instead they are created by the security policy code based on reading |
| 72 | * the security policy file. |
| 73 | * |
| 74 | * @author Mandy Chung |
| 75 | * @since 1.5 |
| 76 | * |
| 77 | * @see java.security.BasicPermission |
| 78 | * @see java.security.Permission |
| 79 | * @see java.security.Permissions |
| 80 | * @see java.security.PermissionCollection |
| 81 | * @see java.lang.SecurityManager |
| 82 | * |
| 83 | */ |
| 84 | |
| 85 | public final class ManagementPermission extends java.security.BasicPermission { |
| 86 | |
| 87 | /** |
| 88 | * Constructs a ManagementPermission with the specified name. |
| 89 | * |
| 90 | * @param name Permission name. Must be either "monitor" or "control". |
| 91 | * |
| 92 | * @throws NullPointerException if <code>name</code> is <code>null</code>. |
| 93 | * @throws IllegalArgumentException if <code>name</code> is empty or invalid. |
| 94 | */ |
| 95 | public ManagementPermission(String name) { |
| 96 | super(name); |
| 97 | if (!name.equals("control") && !name.equals("monitor")) { |
| 98 | throw new IllegalArgumentException("name: " + name); |
| 99 | } |
| 100 | } |
| 101 | |
| 102 | /** |
| 103 | * Constructs a new ManagementPermission object. |
| 104 | * |
| 105 | * @param name Permission name. Must be either "monitor" or "control". |
| 106 | * @param actions Must be either null or the empty string. |
| 107 | * |
| 108 | * @throws NullPointerException if <code>name</code> is <code>null</code>. |
| 109 | * @throws IllegalArgumentException if <code>name</code> is empty or |
| 110 | * if arguments are invalid. |
| 111 | */ |
| 112 | public ManagementPermission(String name, String actions) |
| 113 | throws IllegalArgumentException { |
| 114 | super(name); |
| 115 | if (!name.equals("control") && !name.equals("monitor")) { |
| 116 | throw new IllegalArgumentException("name: " + name); |
| 117 | } |
| 118 | if (actions != null && actions.length() > 0) { |
| 119 | throw new IllegalArgumentException("actions: " + actions); |
| 120 | } |
| 121 | } |
| 122 | } |