mirror of git://gcc.gnu.org/git/gcc.git
209 lines
8.4 KiB
Java
209 lines
8.4 KiB
Java
/* RuntimePermission.java -- permission for a secure runtime action
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Copyright (C) 1998, 2000, 2002 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package java.lang;
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import java.security.BasicPermission;
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/**
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* A <code>RuntimePermission</code> contains a permission name, but no
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* actions list. This means you either have the permission or you don't.
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*
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* Permission names have the follow the hierarchial property naming
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* convention. In addition, an asterisk may appear at the end of a
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* name if following a period or by itself.
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*
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* <table border=1>
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* <tr><th>Valid names</th><th>Invalid names</th></tr>
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* <tr><td>"accessClassInPackage.*","*"</td>
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* <td>"**", "*x", "*.a"</td></tr>
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* </table>
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* <br>
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*
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* The following table provides a list of all the possible RuntimePermission
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* permission names with a description of what that permission allows.<br>
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* <table border=1>
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* <tr><th>Permission Name</th><th>Permission Allows</th><th>Risks</th</tr>
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* <tr>
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* <td><code>createClassLoader</code></td>
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* <td>creation of a class loader</td>
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* <td>a class loader can load rogue classes which bypass all security
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* permissions</td></tr>
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* <tr>
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* <td><code>getClassLoader</code></td>
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* <td>retrieval of the class loader for the calling class</td>
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* <td>rogue code could load classes not otherwise available</td></tr>
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* <tr>
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* <td><code>setContextClassLoader</code></td>
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* <td>allows the setting of the context class loader used by a thread</td>
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* <td>rogue code could change the context class loader needed by system
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* threads</td></tr>
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* <tr>
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* <td><code>setSecurityManager</code></td>
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* <td>allows the application to replace the security manager</td>
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* <td>the new manager may be less restrictive, so that rogue code can
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* bypass existing security checks</td></tr>
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* <tr>
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* <td><code>createSecurityManager</code></td>
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* <td>allows the application to create a new security manager</td>
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* <td>rogue code can use the new security manager to discover information
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* about the execution stack</td></tr>
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* <tr>
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* <td><code>exitVM</code></td>
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* <td>allows the application to halt the virtual machine</td>
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* <td>rogue code can mount a denial-of-service attack by killing the
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* virtual machine</td></tr>
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* <tr>
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* <td><code>shutdownHooks</code></td>
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* <td>allows registration and modification of shutdown hooks</td>
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* <td>rogue code can add a hook that interferes with clean
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* virtual machine shutdown</td></tr>
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* <tr>
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* <td><code>setFactory</code></td>
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* <td>allows the application to set the socket factory for socket,
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* server socket, stream handler, or RMI socket factory.</td>
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* <td>rogue code can create a rogue network object which mangles or
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* intercepts data</td></tr>
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* <tr>
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* <td><code>setIO</code></td>
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* <td>allows the application to set System.out, System.in, and
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* System.err</td>
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* <td>rogue code could sniff user input and intercept or mangle
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* output</td></tr>
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* <tr>
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* <td><code>modifyThread</code></td>
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* <td>allows the application to modify any thread in the virtual machine
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* using any of the methods <code>stop</code>, <code>resume</code>,
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* <code>suspend</code>, <code>setPriority</code>, and
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* <code>setName</code> of classs <code>Thread</code></td>
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* <td>rogue code could adversely modify system or user threads</td></tr>
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* <tr>
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* <td><code>stopThread</code></td>
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* <td>allows the application to <code>stop</code> any thread it has
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* access to in the system</td>
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* <td>rogue code can stop arbitrary threads</td></tr>
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* <tr>
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* <td><code>modifyThreadGroup</code></td>
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* <td>allows the application to modify thread groups using any of the
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* methods <code>destroy</code>, <code>resume</code>,
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* <code>setDaemon</code>, <code>setMaxPriority</code>,
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* <code>stop</code>, and <code>suspend</code> of the class
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* <code>ThreadGroup</code></td>
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* <td>rogue code can mount a denial-of-service attack by changing run
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* priorities</td></tr>
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* <tr>
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* <td><code>getProtectionDomain</code></td>
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* <td>retrieve a class's ProtectionDomain</td>
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* <td>rogue code can gain information about the security policy, to
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* prepare a better attack</td></tr>
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* <tr>
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* <td><code>readFileDescriptor</code></td>
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* <td>read a file descriptor</td>
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* <td>rogue code can read sensitive information</td></tr>
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* <tr>
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* <td><code>writeFileDescriptor</code></td>
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* <td>write a file descriptor</td>
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* <td>rogue code can write files, including viruses, and can modify the
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* virtual machine binary; if not just fill up the disk</td></tr>
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* <tr>
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* <td><code>loadLibrary.</code><em>library name</em></td>
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* <td>dynamic linking of the named library</td>
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* <td>native code can bypass many security checks of pure Java</td></tr>
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* <tr>
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* <td><code>accessClassInPackage.</code><em>package name</em></td>
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* <td>access to a package via a ClassLoader</td>
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* <td>rogue code can access classes not normally available</td></tr>
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* <tr>
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* <td><code>defineClassInPackage.</code><em>package name</em></td>
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* <td>define a class inside a given package</td>
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* <td>rogue code can install rogue classes, including in trusted packages
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* like java.security or java.lang</td></tr>
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* <tr>
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* <td><code>accessDeclaredMembers</code></td>
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* <td>access declared class members via reflection</td>
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* <td>rogue code can discover information, invoke methods, or modify fields
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* that are not otherwise available</td></tr>
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* <tr>
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* <td><code>queuePrintJob</code></td>
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* <td>initiate a print job</td>
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* <td>rogue code could make a hard copy of sensitive information, or
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* simply waste paper</td></tr>
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* </table>
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*
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* @author Brian Jones
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* @author Eric Blake <ebb9@email.byu.edu>
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* @see BasicPermission
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* @see Permission
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* @see SecurityManager
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* @since 1.2
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* @status updated to 1.4
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*/
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public final class RuntimePermission extends BasicPermission
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{
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/**
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* Compatible with JDK 1.2+.
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*/
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private static final long serialVersionUID = 7399184964622342223L;
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/**
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* Create a new permission with the specified name.
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*
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* @param permissionName the name of the granted permission
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* @throws NullPointerException if name is null
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* @throws IllegalArgumentException thrown if name is empty or invalid
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*/
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public RuntimePermission(String permissionName)
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{
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super(permissionName);
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}
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/**
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* Create a new permission with the specified name. The actions argument
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* is ignored, as runtime permissions have no actions.
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*
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* @param permissionName the name of the granted permission
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* @param actions ignored
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* @throws NullPointerException if name is null
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* @throws IllegalArgumentException thrown if name is empty or invalid
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*/
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public RuntimePermission(String permissionName, String actions)
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{
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super(permissionName);
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}
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}
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