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211 lines
9.5 KiB
Java
211 lines
9.5 KiB
Java
/*
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* Copyright (c) 1997, 2017, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package java.awt;
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import java.security.BasicPermission;
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/**
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* This class is for AWT permissions.
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* An {@code AWTPermission} contains a target name but
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* no actions list; you either have the named permission
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* or you don't.
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*
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* <P>
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* The target name is the name of the AWT permission (see below). The naming
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* convention follows the hierarchical property naming convention.
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* Also, an asterisk could be used to represent all AWT permissions.
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*
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* <P>
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* The following table lists all the possible {@code AWTPermission}
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* target names, and for each provides a description of what the
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* permission allows and a discussion of the risks of granting code
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* the permission.
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*
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* <table class="striped">
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* <caption>AWTPermission target names, descriptions, and associated risks
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* </caption>
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* <thead>
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* <tr>
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* <th scope="col">Permission Target Name
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* <th scope="col">What the Permission Allows
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* <th scope="col">Risks of Allowing this Permission
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* </thead>
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* <tbody>
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* <tr>
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* <th scope="row">accessClipboard
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* <td>Posting and retrieval of information to and from the AWT clipboard
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* <td>This would allow malfeasant code to share potentially sensitive or
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* confidential information.
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* <tr>
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* <th scope="row">accessEventQueue
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* <td>Access to the AWT event queue
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* <td>After retrieving the AWT event queue, malicious code may peek at and
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* even remove existing events from its event queue, as well as post bogus
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* events which may purposefully cause the application or applet to
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* misbehave in an insecure manner.
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* <tr>
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* <th scope="row">accessSystemTray
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* <td>Access to the AWT SystemTray instance
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* <td>This would allow malicious code to add tray icons to the system tray.
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* First, such an icon may look like the icon of some known application
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* (such as a firewall or anti-virus) and order a user to do something
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* unsafe (with help of balloon messages). Second, the system tray may be
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* glutted with tray icons so that no one could add a tray icon anymore.
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* <tr>
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* <th scope="row">createRobot
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* <td>Create java.awt.Robot objects
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* <td>The java.awt.Robot object allows code to generate native-level mouse
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* and keyboard events as well as read the screen. It could allow malicious
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* code to control the system, run other programs, read the display, and
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* deny mouse and keyboard access to the user.
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* <tr>
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* <th scope="row">fullScreenExclusive
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* <td>Enter full-screen exclusive mode
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* <td>Entering full-screen exclusive mode allows direct access to low-level
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* graphics card memory. This could be used to spoof the system, since the
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* program is in direct control of rendering. Depending on the
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* implementation, the security warning may not be shown for the windows
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* used to enter the full-screen exclusive mode (assuming that the
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* {@code fullScreenExclusive} permission has been granted to this
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* application). Note that this behavior does not mean that the
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* {@code showWindowWithoutWarningBanner} permission will be automatically
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* granted to the application which has the {@code fullScreenExclusive}
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* permission: non-full-screen windows will continue to be shown with the
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* security warning.
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* <tr>
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* <th scope="row">listenToAllAWTEvents
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* <td>Listen to all AWT events, system-wide
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* <td>After adding an AWT event listener, malicious code may scan all AWT
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* events dispatched in the system, allowing it to read all user input (such
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* as passwords). Each AWT event listener is called from within the context
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* of that event queue's EventDispatchThread, so if the accessEventQueue
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* permission is also enabled, malicious code could modify the contents of
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* AWT event queues system-wide, causing the application or applet to
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* misbehave in an insecure manner.
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* <tr>
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* <th scope="row">readDisplayPixels
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* <td>Readback of pixels from the display screen
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* <td>Interfaces such as the java.awt.Composite interface or the
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* java.awt.Robot class allow arbitrary code to examine pixels on the
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* display enable malicious code to snoop on the activities of the user.
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* <tr>
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* <th scope="row">replaceKeyboardFocusManager
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* <td>Sets the {@code KeyboardFocusManager} for a particular thread.
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* <td>When {@code SecurityManager} is installed, the invoking thread must
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* be granted this permission in order to replace the current
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* {@code KeyboardFocusManager}. If permission is not granted, a
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* {@code SecurityException} will be thrown.
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* <tr>
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* <th scope="row">setAppletStub
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* <td>Setting the stub which implements Applet container services
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* <td>Malicious code could set an applet's stub and result in unexpected
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* behavior or denial of service to an applet.
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* <tr>
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* <th scope="row">setWindowAlwaysOnTop
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* <td>Setting always-on-top property of the window:
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* {@link Window#setAlwaysOnTop}
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* <td>The malicious window might make itself look and behave like a real
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* full desktop, so that information entered by the unsuspecting user is
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* captured and subsequently misused
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* <tr>
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* <th scope="row">showWindowWithoutWarningBanner
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* <td>Display of a window without also displaying a banner warning that the
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* window was created by an applet
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* <td>Without this warning, an applet may pop up windows without the user
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* knowing that they belong to an applet. Since users may make
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* security-sensitive decisions based on whether or not the window belongs
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* to an applet (entering a username and password into a dialog box, for
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* example), disabling this warning banner may allow applets to trick the
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* user into entering such information.
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* <tr>
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* <th scope="row">toolkitModality
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* <td>Creating {@link Dialog.ModalityType#TOOLKIT_MODAL TOOLKIT_MODAL}
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* dialogs and setting the
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* {@link Dialog.ModalExclusionType#TOOLKIT_EXCLUDE TOOLKIT_EXCLUDE} window
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* property.
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* <td>When a toolkit-modal dialog is shown from an applet, it blocks all
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* other applets in the browser. When launching applications from Java Web
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* Start, its windows (such as the security dialog) may also be blocked by
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* toolkit-modal dialogs, shown from these applications.
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* <tr>
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* <th scope="row">watchMousePointer
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* <td>Getting the information about the mouse pointer position at any time
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* <td>Constantly watching the mouse pointer, an applet can make guesses
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* about what the user is doing, i.e. moving the mouse to the lower left
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* corner of the screen most likely means that the user is about to launch
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* an application. If a virtual keypad is used so that keyboard is emulated
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* using the mouse, an applet may guess what is being typed.
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* </tbody>
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* </table>
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*
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* @see java.security.BasicPermission
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* @see java.security.Permission
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* @see java.security.Permissions
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* @see java.security.PermissionCollection
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* @see java.lang.SecurityManager
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*
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* @author Marianne Mueller
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* @author Roland Schemers
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*/
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public final class AWTPermission extends BasicPermission {
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/** use serialVersionUID from the Java 2 platform for interoperability */
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private static final long serialVersionUID = 8890392402588814465L;
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/**
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* Creates a new {@code AWTPermission} with the specified name.
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* The name is the symbolic name of the {@code AWTPermission},
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* such as "topLevelWindow", "systemClipboard", etc. An asterisk
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* may be used to indicate all AWT permissions.
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*
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* @param name the name of the AWTPermission
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*
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* @throws NullPointerException if {@code name} is {@code null}.
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* @throws IllegalArgumentException if {@code name} is empty.
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*/
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public AWTPermission(String name)
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{
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super(name);
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}
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/**
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* Creates a new {@code AWTPermission} object with the specified name.
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* The name is the symbolic name of the {@code AWTPermission}, and the
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* actions string is currently unused and should be {@code null}.
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*
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* @param name the name of the {@code AWTPermission}
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* @param actions should be {@code null}
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*
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* @throws NullPointerException if {@code name} is {@code null}.
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* @throws IllegalArgumentException if {@code name} is empty.
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*/
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public AWTPermission(String name, String actions)
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{
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super(name, actions);
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}
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}
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