1 /*
2 * Copyright 1997-2005 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 java.awt;
27
28 import java.security.BasicPermission;
29
30 /**
31 * This class is for AWT permissions.
32 * An <code>AWTPermission</code> 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</code>
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 * <P>
47 *
48 * <table border=1 cellpadding=5 summary="AWTPermission target names, descriptions, and associated risks.">
49 * <tr>
50 * <th>Permission Target Name</th>
51 * <th>What the Permission Allows</th>
52 * <th>Risks of Allowing this Permission</th>
53 * </tr>
54 *
55 * <tr>
56 * <td>accessClipboard</td>
57 * <td>Posting and retrieval of information to and from the AWT clipboard</td>
58 * <td>This would allow malfeasant code to share
59 * potentially sensitive or confidential information.</td>
60 * </tr>
61 *
62 * <tr>
63 * <td>accessEventQueue</td>
64 * <td>Access to the AWT event queue</td>
65 * <td>After retrieving the AWT event queue,
66 * malicious code may peek at and even remove existing events
67 * from its event queue, as well as post bogus events which may purposefully
68 * cause the application or applet to misbehave in an insecure manner.</td>
69 * </tr>
70 *
71 * <tr>
72 * <td>accessSystemTray</td>
73 * <td>Access to the AWT SystemTray instance</td>
74 * <td>This would allow malicious code to add tray icons to the system tray.
75 * First, such an icon may look like the icon of some known application
76 * (such as a firewall or anti-virus) and order a user to do something unsafe
77 * (with help of balloon messages). Second, the system tray may be glutted with
78 * tray icons so that no one could add a tray icon anymore.</td>
79 * </tr>
80 *
81 * <tr>
82 * <td>createRobot</td>
83 * <td>Create java.awt.Robot objects</td>
84 * <td>The java.awt.Robot object allows code to generate native-level
85 * mouse and keyboard events as well as read the screen. It could allow
86 * malicious code to control the system, run other programs, read the
87 * display, and deny mouse and keyboard access to the user.</td>
88 * </tr>
89 *
90 * <tr>
91 * <td>fullScreenExclusive</td>
92 * <td>Enter full-screen exclusive mode</td>
93 * <td>Entering full-screen exclusive mode allows direct access to
94 * low-level graphics card memory. This could be used to spoof the
95 * system, since the program is in direct control of rendering.</td>
96 * </tr>
97 *
98 * <tr>
99 * <td>listenToAllAWTEvents</td>
100 * <td>Listen to all AWT events, system-wide</td>
101 * <td>After adding an AWT event listener,
102 * malicious code may scan all AWT events dispatched in the system,
103 * allowing it to read all user input (such as passwords). Each
104 * AWT event listener is called from within the context of that
105 * event queue's EventDispatchThread, so if the accessEventQueue
106 * permission is also enabled, malicious code could modify the
107 * contents of AWT event queues system-wide, causing the application
108 * or applet to misbehave in an insecure manner.</td>
109 * </tr>
110 *
111 * <tr>
112 * <td>readDisplayPixels</td>
113 * <td>Readback of pixels from the display screen</td>
114 * <td>Interfaces such as the java.awt.Composite interface or the
115 * java.awt.Robot class allow arbitrary code to examine pixels on the
116 * display enable malicious code to snoop on the activities of the user.</td>
117 * </tr>
118 *
119 * <tr>
120 * <td>replaceKeyboardFocusManager</td>
121 * <td>Sets the <code>KeyboardFocusManager</code> for
122 * a particular thread.
123 * <td>When <code>SecurityManager</code> is installed, the invoking
124 * thread must be granted this permission in order to replace
125 * the current <code>KeyboardFocusManager</code>. If permission
126 * is not granted, a <code>SecurityException</code> will be thrown.
127 * </tr>
128 *
129 * <tr>
130 * <td>setAppletStub</td>
131 * <td>Setting the stub which implements Applet container services</td>
132 * <td>Malicious code could set an applet's stub and result in unexpected
133 * behavior or denial of service to an applet.</td>
134 * </tr>
135 *
136 * <tr>
137 * <td>setWindowAlwaysOnTop</td>
138 * <td>Setting always-on-top property of the window: {@link Window#setAlwaysOnTop}</td>
139 * <td>The malicious window might make itself look and behave like a real full desktop, so that
140 * information entered by the unsuspecting user is captured and subsequently misused </td>
141 * </tr>
142 *
143 * <tr>
144 * <td>showWindowWithoutWarningBanner</td>
145 * <td>Display of a window without also displaying a banner warning
146 * that the window was created by an applet</td>
147 * <td>Without this warning,
148 * an applet may pop up windows without the user knowing that they
149 * belong to an applet. Since users may make security-sensitive
150 * decisions based on whether or not the window belongs to an applet
151 * (entering a username and password into a dialog box, for example),
152 * disabling this warning banner may allow applets to trick the user
153 * into entering such information.</td>
154 * </tr>
155 *
156 * <tr>
157 * <td>toolkitModality</td>
158 * <td>Creating {@link Dialog.ModalityType#TOOLKIT_MODAL TOOLKIT_MODAL} dialogs
159 * and setting the {@link Dialog.ModalExclusionType#TOOLKIT_EXCLUDE
160 * TOOLKIT_EXCLUDE} window property.</td>
161 * <td>When a toolkit-modal dialog is shown from an applet, it blocks all other
162 * applets in the browser. When launching applications from Java Web Start,
163 * its windows (such as the security dialog) may also be blocked by toolkit-modal
164 * dialogs, shown from these applications.</td>
165 * </tr>
166 *
167 * <tr>
168 * <td>watchMousePointer</td>
169 * <td>Getting the information about the mouse pointer position at any
170 * time</td>
171 * <td>Constantly watching the mouse pointer,
172 * an applet can make guesses about what the user is doing, i.e. moving
173 * the mouse to the lower left corner of the screen most likely means that
174 * the user is about to launch an application. If a virtual keypad is used
175 * so that keyboard is emulated using the mouse, an applet may guess what
176 * is being typed.</td>
177 * </tr>
178 * </table>
179 *
180 * @see java.security.BasicPermission
181 * @see java.security.Permission
182 * @see java.security.Permissions
183 * @see java.security.PermissionCollection
184 * @see java.lang.SecurityManager
185 *
186 *
187 * @author Marianne Mueller
188 * @author Roland Schemers
189 */
190
191 public final class AWTPermission extends BasicPermission {
192
193 /** use serialVersionUID from the Java 2 platform for interoperability */
194 private static final long serialVersionUID = 8890392402588814465L;
195
196 /**
197 * Creates a new <code>AWTPermission</code> with the specified name.
198 * The name is the symbolic name of the <code>AWTPermission</code>,
199 * such as "topLevelWindow", "systemClipboard", etc. An asterisk
200 * may be used to indicate all AWT permissions.
201 *
202 * @param name the name of the AWTPermission
203 *
204 * @throws NullPointerException if <code>name</code> is <code>null</code>.
205 * @throws IllegalArgumentException if <code>name</code> is empty.
206 */
207
208 public AWTPermission(String name)
209 {
210 super(name);
211 }
212
213 /**
214 * Creates a new <code>AWTPermission</code> object with the specified name.
215 * The name is the symbolic name of the <code>AWTPermission</code>, and the
216 * actions string is currently unused and should be <code>null</code>.
217 *
218 * @param name the name of the <code>AWTPermission</code>
219 * @param actions should be <code>null</code>
220 *
221 * @throws NullPointerException if <code>name</code> is <code>null</code>.
222 * @throws IllegalArgumentException if <code>name</code> is empty.
223 */
224
225 public AWTPermission(String name, String actions)
226 {
227 super(name, actions);
228 }
229 }
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