001/* RuntimePermission.java -- permission for a secure runtime action
002   Copyright (C) 1998, 2000, 2002, 2005  Free Software Foundation, Inc.
003
004This file is part of GNU Classpath.
005
006GNU Classpath is free software; you can redistribute it and/or modify
007it under the terms of the GNU General Public License as published by
008the Free Software Foundation; either version 2, or (at your option)
009any later version.
010
011GNU Classpath is distributed in the hope that it will be useful, but
012WITHOUT ANY WARRANTY; without even the implied warranty of
013MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
014General Public License for more details.
015
016You should have received a copy of the GNU General Public License
017along with GNU Classpath; see the file COPYING.  If not, write to the
018Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
01902110-1301 USA.
020
021Linking this library statically or dynamically with other modules is
022making a combined work based on this library.  Thus, the terms and
023conditions of the GNU General Public License cover the whole
024combination.
025
026As a special exception, the copyright holders of this library give you
027permission to link this library with independent modules to produce an
028executable, regardless of the license terms of these independent
029modules, and to copy and distribute the resulting executable under
030terms of your choice, provided that you also meet, for each linked
031independent module, the terms and conditions of the license of that
032module.  An independent module is a module which is not derived from
033or based on this library.  If you modify this library, you may extend
034this exception to your version of the library, but you are not
035obligated to do so.  If you do not wish to do so, delete this
036exception statement from your version. */
037
038
039package java.lang;
040
041import java.security.BasicPermission;
042import java.security.Permission;
043
044/**
045 * A <code>RuntimePermission</code> contains a permission name, but no
046 * actions list.  This means you either have the permission or you don't.
047 *
048 * Permission names have the follow the hierarchial property naming
049 * convention.  In addition, an asterisk may appear at the end of a
050 * name if following a period or by itself.
051 *
052 * <table border=1>
053 * <tr><th>Valid names</th><th>Invalid names</th></tr>
054 * <tr><td>"accessClassInPackage.*","*"</td>
055 * <td>"**", "*x", "*.a"</td></tr>
056 * </table>
057 * <br>
058 *
059 * The following table provides a list of all the possible RuntimePermission
060 * permission names with a description of what that permission allows.<br>
061 * <table border=1>
062 * <tr><th>Permission Name</th><th>Permission Allows</th><th>Risks</th</tr>
063 * <tr>
064 *   <td><code>createClassLoader</code></td>
065 *   <td>creation of a class loader</td>
066 *   <td>a class loader can load rogue classes which bypass all security
067 *       permissions</td></tr>
068 * <tr>
069 *   <td><code>getClassLoader</code></td>
070 *   <td>retrieval of the class loader for the calling class</td>
071 *   <td>rogue code could load classes not otherwise available</td></tr>
072 * <tr>
073 *   <td><code>setContextClassLoader</code></td>
074 *   <td>allows the setting of the context class loader used by a thread</td>
075 *   <td>rogue code could change the context class loader needed by system
076 *       threads</td></tr>
077 * <tr>
078 *   <td><code>setSecurityManager</code></td>
079 *   <td>allows the application to replace the security manager</td>
080 *   <td>the new manager may be less restrictive, so that rogue code can
081 *       bypass existing security checks</td></tr>
082 * <tr>
083 *   <td><code>createSecurityManager</code></td>
084 *   <td>allows the application to create a new security manager</td>
085 *   <td>rogue code can use the new security manager to discover information
086 *       about the execution stack</td></tr>
087 * <tr>
088 *   <td><code>exitVM</code></td>
089 *   <td>allows the application to halt the virtual machine</td>
090 *   <td>rogue code can mount a denial-of-service attack by killing the
091 *       virtual machine</td></tr>
092 * <tr>
093 *   <td><code>shutdownHooks</code></td>
094 *   <td>allows registration and modification of shutdown hooks</td>
095 *   <td>rogue code can add a hook that interferes with clean
096 *       virtual machine shutdown</td></tr>
097 * <tr>
098 *   <td><code>setFactory</code></td>
099 *   <td>allows the application to set the socket factory for socket,
100 *       server socket, stream handler, or RMI socket factory.</td>
101 *   <td>rogue code can create a rogue network object which mangles or
102 *       intercepts data</td></tr>
103 * <tr>
104 *   <td><code>setIO</code></td>
105 *   <td>allows the application to set System.out, System.in, and
106 *       System.err</td>
107 *   <td>rogue code could sniff user input and intercept or mangle
108 *       output</td></tr>
109 * <tr>
110 *   <td><code>modifyThread</code></td>
111 *   <td>allows the application to modify any thread in the virtual machine
112 *       using any of the methods <code>stop</code>, <code>resume</code>,
113 *       <code>suspend</code>, <code>setPriority</code>, and
114 *       <code>setName</code> of classs <code>Thread</code></td>
115 *   <td>rogue code could adversely modify system or user threads</td></tr>
116 * <tr>
117 *   <td><code>stopThread</code></td>
118 *   <td>allows the application to <code>stop</code> any thread it has
119 *       access to in the system</td>
120 *   <td>rogue code can stop arbitrary threads</td></tr>
121 * <tr>
122 *   <td><code>modifyThreadGroup</code></td>
123 *   <td>allows the application to modify thread groups using any of the
124 *       methods <code>destroy</code>, <code>resume</code>,
125 *       <code>setDaemon</code>, <code>setMaxPriority</code>,
126 *       <code>stop</code>, and <code>suspend</code> of the class
127 *       <code>ThreadGroup</code></td>
128 *   <td>rogue code can mount a denial-of-service attack by changing run
129 *       priorities</td></tr>
130 * <tr>
131 *   <td><code>getProtectionDomain</code></td>
132 *   <td>retrieve a class's ProtectionDomain</td>
133 *   <td>rogue code can gain information about the security policy, to
134 *       prepare a better attack</td></tr>
135 * <tr>
136 *   <td><code>readFileDescriptor</code></td>
137 *   <td>read a file descriptor</td>
138 *   <td>rogue code can read sensitive information</td></tr>
139 * <tr>
140 *   <td><code>writeFileDescriptor</code></td>
141 *   <td>write a file descriptor</td>
142 *   <td>rogue code can write files, including viruses, and can modify the
143 *       virtual machine binary; if not just fill up the disk</td></tr>
144 * <tr>
145 *   <td><code>loadLibrary.</code><em>library name</em></td>
146 *   <td>dynamic linking of the named library</td>
147 *   <td>native code can bypass many security checks of pure Java</td></tr>
148 * <tr>
149 *   <td><code>accessClassInPackage.</code><em>package name</em></td>
150 *   <td>access to a package via a ClassLoader</td>
151 *   <td>rogue code can access classes not normally available</td></tr>
152 * <tr>
153 *   <td><code>defineClassInPackage.</code><em>package name</em></td>
154 *   <td>define a class inside a given package</td>
155 *   <td>rogue code can install rogue classes, including in trusted packages
156 *       like java.security or java.lang</td></tr>
157 * <tr>
158 *   <td><code>accessDeclaredMembers</code></td>
159 *   <td>access declared class members via reflection</td>
160 *   <td>rogue code can discover information, invoke methods, or modify fields
161 *       that are not otherwise available</td></tr>
162 * <tr>
163 *   <td><code>queuePrintJob</code></td>
164 *   <td>initiate a print job</td>
165 *   <td>rogue code could make a hard copy of sensitive information, or
166 *       simply waste paper</td></tr>
167 * </table>
168 *
169 * @author Brian Jones
170 * @author Eric Blake (ebb9@email.byu.edu)
171 * @see BasicPermission
172 * @see Permission
173 * @see SecurityManager
174 * @since 1.2
175 * @status updated to 1.4
176 */
177public final class RuntimePermission extends BasicPermission
178{
179  /**
180   * Compatible with JDK 1.2+.
181   */
182  private static final long serialVersionUID = 7399184964622342223L;
183
184  /**
185   * Create a new permission with the specified name.
186   *
187   * @param permissionName the name of the granted permission
188   * @throws NullPointerException if name is null
189   * @throws IllegalArgumentException thrown if name is empty or invalid
190   */
191  public RuntimePermission(String permissionName)
192    {
193      super(permissionName);
194    }
195
196  /**
197   * Create a new permission with the specified name. The actions argument
198   * is ignored, as runtime permissions have no actions.
199   *
200   * @param permissionName the name of the granted permission
201   * @param actions ignored
202   * @throws NullPointerException if name is null
203   * @throws IllegalArgumentException thrown if name is empty or invalid
204   */
205  public RuntimePermission(String permissionName, String actions)
206  {
207    super(permissionName);
208  }
209}