1 /*
2 * Copyright (c) 2003, 2017, Oracle and/or its affiliates. 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. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * 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 *
37 * <table class="striped">
38 * <caption style="display:none">Table shows permission target name, what the permission allows, and associated risks</caption>
39 * <thead>
40 * <tr>
41 * <th scope="col">Permission Target Name</th>
42 * <th scope="col">What the Permission Allows</th>
43 * <th scope="col">Risks of Allowing this Permission</th>
44 * </tr>
45 * </thead>
46 * <tbody style="text=align:left">
47 *
48 * <tr>
49 * <th scope="row">control</th>
50 * <td>Ability to control the runtime characteristics of the Java virtual
51 * machine, for example, enabling and disabling the verbose output for
52 * the class loading or memory system, setting the threshold of a memory
53 * pool, and enabling and disabling the thread contention monitoring
54 * support. Some actions controlled by this permission can disclose
55 * information about the running application, like the -verbose:class
56 * flag.
57 * </td>
58 * <td>This allows an attacker to control the runtime characteristics
59 * of the Java virtual machine and cause the system to misbehave. An
60 * attacker can also access some information related to the running
61 * application.
62 * </td>
63 * </tr>
64 * <tr>
65 * <th scope="row">monitor</th>
66 * <td>Ability to retrieve runtime information about
67 * the Java virtual machine such as thread
68 * stack trace, a list of all loaded class names, and input arguments
69 * to the Java virtual machine.</td>
70 * <td>This allows malicious code to monitor runtime information and
71 * uncover vulnerabilities.</td>
72 * </tr>
73 *
74 * </tbody>
75 * </table>
76 *
77 * <p>
78 * Programmers do not normally create ManagementPermission objects directly.
79 * Instead they are created by the security policy code based on reading
80 * the security policy file.
81 *
82 * @author Mandy Chung
83 * @since 1.5
84 *
85 * @see java.security.BasicPermission
86 * @see java.security.Permission
87 * @see java.security.Permissions
88 * @see java.security.PermissionCollection
89 * @see java.lang.SecurityManager
90 *
91 */
92
93 public final class ManagementPermission extends java.security.BasicPermission {
94 private static final long serialVersionUID = 1897496590799378737L;
95
96 /**
97 * Constructs a ManagementPermission with the specified name.
98 *
99 * @param name Permission name. Must be either "monitor" or "control".
100 *
101 * @throws NullPointerException if <code>name</code> is <code>null</code>.
102 * @throws IllegalArgumentException if <code>name</code> is empty or invalid.
103 */
104 public ManagementPermission(String name) {
105 super(name);
106 if (!name.equals("control") && !name.equals("monitor")) {
107 throw new IllegalArgumentException("name: " + name);
108 }
109 }
110
111 /**
112 * Constructs a new ManagementPermission object.
113 *
114 * @param name Permission name. Must be either "monitor" or "control".
115 * @param actions Must be either null or the empty string.
116 *
117 * @throws NullPointerException if <code>name</code> is <code>null</code>.
118 * @throws IllegalArgumentException if <code>name</code> is empty or
119 * if arguments are invalid.
120 */
121 public ManagementPermission(String name, String actions)
122 throws IllegalArgumentException {
123 super(name);
124 if (!name.equals("control") && !name.equals("monitor")) {
125 throw new IllegalArgumentException("name: " + name);
126 }
127 if (actions != null && actions.length() > 0) {
128 throw new IllegalArgumentException("actions: " + actions);
129 }
130 }
131 }
132