1 /*
2 * Copyright (c) 1997, 2013, 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.awt;
27
28 import java.security.BasicPermission;
29
30 /**
31 * This class is for AWT permissions.
32 * An {@code AWTPermission} contains a target name but
33 * no actions list; you either have the named permission
34 * or you don't.
35 *
36 * <P>
37 * The target name is the name of the AWT permission (see below). The naming
38 * convention follows the hierarchical property naming convention.
39 * Also, an asterisk could be used to represent all AWT permissions.
40 *
41 * <P>
42 * The following table lists all the possible {@code AWTPermission}
43 * target names, and for each provides a description of what the
44 * permission allows and a discussion of the risks of granting code
45 * the permission.
46 *
47 * <table border=1 cellpadding=5 summary="AWTPermission target names, descriptions, and associated risks.">
48 * <tr>
49 * <th>Permission Target Name</th>
50 * <th>What the Permission Allows</th>
51 * <th>Risks of Allowing this Permission</th>
52 * </tr>
53 *
54 * <tr>
55 * <td>accessClipboard</td>
56 * <td>Posting and retrieval of information to and from the AWT clipboard</td>
57 * <td>This would allow malfeasant code to share
58 * potentially sensitive or confidential information.</td>
59 * </tr>
60 *
61 * <tr>
62 * <td>accessEventQueue</td>
63 * <td>Access to the AWT event queue</td>
64 * <td>After retrieving the AWT event queue,
65 * malicious code may peek at and even remove existing events
66 * from its event queue, as well as post bogus events which may purposefully
67 * cause the application or applet to misbehave in an insecure manner.</td>
68 * </tr>
69 *
70 * <tr>
71 * <td>accessSystemTray</td>
72 * <td>Access to the AWT SystemTray instance</td>
73 * <td>This would allow malicious code to add tray icons to the system tray.
74 * First, such an icon may look like the icon of some known application
75 * (such as a firewall or anti-virus) and order a user to do something unsafe
76 * (with help of balloon messages). Second, the system tray may be glutted with
77 * tray icons so that no one could add a tray icon anymore.</td>
78 * </tr>
79 *
80 * <tr>
81 * <td>createRobot</td>
82 * <td>Create java.awt.Robot objects</td>
83 * <td>The java.awt.Robot object allows code to generate native-level
84 * mouse and keyboard events as well as read the screen. It could allow
85 * malicious code to control the system, run other programs, read the
86 * display, and deny mouse and keyboard access to the user.</td>
87 * </tr>
88 *
89 * <tr>
90 * <td>fullScreenExclusive</td>
91 * <td>Enter full-screen exclusive mode</td>
92 * <td>Entering full-screen exclusive mode allows direct access to
93 * low-level graphics card memory. This could be used to spoof the
94 * system, since the program is in direct control of rendering. Depending on
95 * the implementation, the security warning may not be shown for the windows
96 * used to enter the full-screen exclusive mode (assuming that the {@code
97 * fullScreenExclusive} permission has been granted to this application). Note
98 * that this behavior does not mean that the {@code
99 * showWindowWithoutWarningBanner} permission will be automatically granted to
100 * the application which has the {@code fullScreenExclusive} permission:
101 * non-full-screen windows will continue to be shown with the security
102 * warning.</td>
103 * </tr>
104 *
105 * <tr>
106 * <td>listenToAllAWTEvents</td>
107 * <td>Listen to all AWT events, system-wide</td>
108 * <td>After adding an AWT event listener,
109 * malicious code may scan all AWT events dispatched in the system,
110 * allowing it to read all user input (such as passwords). Each
111 * AWT event listener is called from within the context of that
112 * event queue's EventDispatchThread, so if the accessEventQueue
113 * permission is also enabled, malicious code could modify the
114 * contents of AWT event queues system-wide, causing the application
115 * or applet to misbehave in an insecure manner.</td>
116 * </tr>
117 *
118 * <tr>
119 * <td>readDisplayPixels</td>
120 * <td>Readback of pixels from the display screen</td>
121 * <td>Interfaces such as the java.awt.Composite interface or the
122 * java.awt.Robot class allow arbitrary code to examine pixels on the
123 * display enable malicious code to snoop on the activities of the user.</td>
124 * </tr>
125 *
126 * <tr>
127 * <td>replaceKeyboardFocusManager</td>
128 * <td>Sets the {@code KeyboardFocusManager} for
129 * a particular thread.
130 * <td>When {@code SecurityManager} is installed, the invoking
131 * thread must be granted this permission in order to replace
132 * the current {@code KeyboardFocusManager}. If permission
133 * is not granted, a {@code SecurityException} will be thrown.
134 * </tr>
135 *
136 * <tr>
137 * <td>setAppletStub</td>
138 * <td>Setting the stub which implements Applet container services</td>
139 * <td>Malicious code could set an applet's stub and result in unexpected
140 * behavior or denial of service to an applet.</td>
141 * </tr>
142 *
143 * <tr>
144 * <td>setWindowAlwaysOnTop</td>
145 * <td>Setting always-on-top property of the window: {@link Window#setAlwaysOnTop}</td>
146 * <td>The malicious window might make itself look and behave like a real full desktop, so that
147 * information entered by the unsuspecting user is captured and subsequently misused </td>
148 * </tr>
149 *
150 * <tr>
151 * <td>showWindowWithoutWarningBanner</td>
152 * <td>Display of a window without also displaying a banner warning
153 * that the window was created by an applet</td>
154 * <td>Without this warning,
155 * an applet may pop up windows without the user knowing that they
156 * belong to an applet. Since users may make security-sensitive
157 * decisions based on whether or not the window belongs to an applet
158 * (entering a username and password into a dialog box, for example),
159 * disabling this warning banner may allow applets to trick the user
160 * into entering such information.</td>
161 * </tr>
162 *
163 * <tr>
164 * <td>toolkitModality</td>
165 * <td>Creating {@link Dialog.ModalityType#TOOLKIT_MODAL TOOLKIT_MODAL} dialogs
166 * and setting the {@link Dialog.ModalExclusionType#TOOLKIT_EXCLUDE
167 * TOOLKIT_EXCLUDE} window property.</td>
168 * <td>When a toolkit-modal dialog is shown from an applet, it blocks all other
169 * applets in the browser. When launching applications from Java Web Start,
170 * its windows (such as the security dialog) may also be blocked by toolkit-modal
171 * dialogs, shown from these applications.</td>
172 * </tr>
173 *
174 * <tr>
175 * <td>watchMousePointer</td>
176 * <td>Getting the information about the mouse pointer position at any
177 * time</td>
178 * <td>Constantly watching the mouse pointer,
179 * an applet can make guesses about what the user is doing, i.e. moving
180 * the mouse to the lower left corner of the screen most likely means that
181 * the user is about to launch an application. If a virtual keypad is used
182 * so that keyboard is emulated using the mouse, an applet may guess what
183 * is being typed.</td>
184 * </tr>
185 * </table>
186 *
187 * @see java.security.BasicPermission
188 * @see java.security.Permission
189 * @see java.security.Permissions
190 * @see java.security.PermissionCollection
191 * @see java.lang.SecurityManager
192 *
193 *
194 * @author Marianne Mueller
195 * @author Roland Schemers
196 */
197
198 public final class AWTPermission extends BasicPermission {
199
200 /** use serialVersionUID from the Java 2 platform for interoperability */
201 private static final long serialVersionUID = 8890392402588814465L;
202
203 /**
204 * Creates a new {@code AWTPermission} with the specified name.
205 * The name is the symbolic name of the {@code AWTPermission},
206 * such as "topLevelWindow", "systemClipboard", etc. An asterisk
207 * may be used to indicate all AWT permissions.
208 *
209 * @param name the name of the AWTPermission
210 *
211 * @throws NullPointerException if {@code name} is {@code null}.
212 * @throws IllegalArgumentException if {@code name} is empty.
213 */
214
215 public AWTPermission(String name)
216 {
217 super(name);
218 }
219
220 /**
221 * Creates a new {@code AWTPermission} object with the specified name.
222 * The name is the symbolic name of the {@code AWTPermission}, and the
223 * actions string is currently unused and should be {@code null}.
224 *
225 * @param name the name of the {@code AWTPermission}
226 * @param actions should be {@code null}
227 *
228 * @throws NullPointerException if {@code name} is {@code null}.
229 * @throws IllegalArgumentException if {@code name} is empty.
230 */
231
232 public AWTPermission(String name, String actions)
233 {
234 super(name, actions);
235 }
236 }