/[classpath]/classpath/java/lang/RuntimePermission.java
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revision 1.5 by mark, Tue Jan 22 22:27:00 2002 UTC revision 1.6 by ericb, Wed Mar 6 19:44:44 2002 UTC
# Line 1  Line 1 
1  /* RuntimePermission.java  /* RuntimePermission.java -- permission for a secure runtime action
2     Copyright (C) 1998, 2000 Free Software Foundation, Inc.     Copyright (C) 1998, 2000, 2002 Free Software Foundation, Inc.
3    
4  This file is part of GNU Classpath.  This file is part of GNU Classpath.
5    
# Line 7  GNU Classpath is free software; you can Line 7  GNU Classpath is free software; you can
7  it under the terms of the GNU General Public License as published by  it under the terms of the GNU General Public License as published by
8  the Free Software Foundation; either version 2, or (at your option)  the Free Software Foundation; either version 2, or (at your option)
9  any later version.  any later version.
10    
11  GNU Classpath is distributed in the hope that it will be useful, but  GNU Classpath is distributed in the hope that it will be useful, but
12  WITHOUT ANY WARRANTY; without even the implied warranty of  WITHOUT ANY WARRANTY; without even the implied warranty of
13  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
# Line 38  exception statement from your version. * Line 38  exception statement from your version. *
38    
39  package java.lang;  package java.lang;
40    
41  import java.security.*;  import java.security.BasicPermission;
42    
43  /**  /**
44   * A <code>RuntimePermission</code> contains a permission name, but no   * A <code>RuntimePermission</code> contains a permission name, but no
45   * actions list.  This means you either have the permission or you don't.   * actions list.  This means you either have the permission or you don't.
46   *   *
47   * Permission names have the follow the hierarchial property naming   * Permission names have the follow the hierarchial property naming
48   * convention.  In addition, an asterisk may appear at the end of a   * convention.  In addition, an asterisk may appear at the end of a
49   * name if following a period or by itself.   * name if following a period or by itself.
50   *   *
51   * <table border=1>   * <table border=1>
# Line 53  import java.security.*; Line 53  import java.security.*;
53   * <tr><td>"accessClassInPackage.*","*"</td>   * <tr><td>"accessClassInPackage.*","*"</td>
54   * <td>"**", "*x", "*.a"</td></tr>   * <td>"**", "*x", "*.a"</td></tr>
55   * </table>   * </table>
  * <br>  
  *  
  * The following table provides a list of all the possible RuntimePermission  
  * permission names with a description of what that permission allows.  
56   * <br>   * <br>
57     *
58     * The following table provides a list of all the possible RuntimePermission
59     * permission names with a description of what that permission allows.<br>
60   * <table border=1>   * <table border=1>
61   * <tr><th>Permission Name</th><th>Permission Allows</th></tr>   * <tr><th>Permission Name</th><th>Permission Allows</th><th>Risks</th</tr>
62   * <tr>   * <tr>
63   *   <td><code>createClassLoader</code></td>   *   <td><code>createClassLoader</code></td>
64   *   <td>creation of a class loader</td></tr>   *   <td>creation of a class loader</td>
65     *   <td>a class loader can load rogue classes which bypass all security
66     *       permissions</td></tr>
67   * <tr>   * <tr>
68   *   <td><code>getClassLoader</code></td>   *   <td><code>getClassLoader</code></td>
69   *   <td>retrieval of the class loader for the calling class</td></tr>   *   <td>retrieval of the class loader for the calling class</td>
70     *   <td>rogue code could load classes not otherwise available</td></tr>
71   * <tr>   * <tr>
72   *   <td><code>setContextClassLoader</code></td>   *   <td><code>setContextClassLoader</code></td>
73   *   <td>allows the setting of the context class loader used by a   *   <td>allows the setting of the context class loader used by a thread</td>
74   *       thread including system threads</td></tr>   *   <td>rogue code could change the context class loader needed by system
75     *       threads</td></tr>
76   * <tr>   * <tr>
77   *   <td><code>setSecurityManager</code></td>   *   <td><code>setSecurityManager</code></td>
78   *   <td>allows the application to replace the security manager with   *   <td>allows the application to replace the security manager</td>
79   *       another, possibly less restrictive one.</td></tr>   *   <td>the new manager may be less restrictive, so that rogue code can
80     *       bypass existing security checks</td></tr>
81   * <tr>   * <tr>
82   *   <td><code>createSecurityManager</code></td>   *   <td><code>createSecurityManager</code></td>
83   *   <td>allows the application to create a new security manager</td></tr>   *   <td>allows the application to create a new security manager</td>
84     *   <td>rogue code can use the new security manager to discover information
85     *       about the execution stack</td></tr>
86   * <tr>   * <tr>
87   *   <td><code>exitVM</code></td>   *   <td><code>exitVM</code></td>
88   *   <td>allows the application to halt the virtual machine</td></tr>   *   <td>allows the application to halt the virtual machine</td>
89     *   <td>rogue code can mount a denial-of-service attack by killing the
90     *       virtual machine</td></tr>
91     * <tr>
92     *   <td><code>shutdownHooks</code></td>
93     *   <td>allows registration and modification of shutdown hooks</td>
94     *   <td>rogue code can add a hook that interferes with clean
95     *       virtual machine shutdown</td></tr>
96   * <tr>   * <tr>
97   *   <td><code>setFactory</code></td>   *   <td><code>setFactory</code></td>
98   *   <td>allows the application to set the socket factory for socket,   *   <td>allows the application to set the socket factory for socket,
99   *       server socket, stream handler, or RMI socket factory.</td></tr>   *       server socket, stream handler, or RMI socket factory.</td>
100     *   <td>rogue code can create a rogue network object which mangles or
101     *       intercepts data</td></tr>
102   * <tr>   * <tr>
103   *   <td><code>setIO</code></td>   *   <td><code>setIO</code></td>
104   *   <td>allows the application to set System.out, System.in, and   *   <td>allows the application to set System.out, System.in, and
105   *       System.err</td></tr>   *       System.err</td>
106     *   <td>rogue code could sniff user input and intercept or mangle
107     *       output</td></tr>
108   * <tr>   * <tr>
109   *   <td><code>modifyThread</code></td>   *   <td><code>modifyThread</code></td>
110   *   <td>allows the application to modify any thread in the virtual machine   *   <td>allows the application to modify any thread in the virtual machine
111   *       using any of the methods <code>stop</code>, <code>resume</code>,   *       using any of the methods <code>stop</code>, <code>resume</code>,
112   *       <code>suspend</code>, <code>setPriority</code>, and   *       <code>suspend</code>, <code>setPriority</code>, and
113   *       <code>setName</code> of classs <code>Thread</code></td></tr>   *       <code>setName</code> of classs <code>Thread</code></td>
114     *   <td>rogue code could adversely modify system or user threads</td></tr>
115   * <tr>   * <tr>
116   *   <td><code>stopThread</code></td>   *   <td><code>stopThread</code></td>
117   *   <td>allows the application to <code>stop</code> any thread it has   *   <td>allows the application to <code>stop</code> any thread it has
118   *       access to in the system</td></tr>   *       access to in the system</td>
119     *   <td>rogue code can stop arbitrary threads</td></tr>
120   * <tr>   * <tr>
121   *   <td><code>modifyThreadGroup</td>   *   <td><code>modifyThreadGroup</td>
122   *   <td>allows the application to modify thread groups using any of the   *   <td>allows the application to modify thread groups using any of the
123   *       methods <code>destroy</code>, <code>resume</code>,   *       methods <code>destroy</code>, <code>resume</code>,
124   *       <code>setDaemon</code>, <code>setMaxPriority</code>,   *       <code>setDaemon</code>, <code>setMaxPriority</code>,
125   *       <code>stop</code>, and <code>suspend</code> of the class   *       <code>stop</code>, and <code>suspend</code> of the class
126   *       <code>ThreadGroup</code></td></tr>   *       <code>ThreadGroup</code></td>
127     *   <td>rogue code can mount a denial-of-service attack by changing run
128     *       priorities</td></tr>
129   * <tr>   * <tr>
130   *   <td><code>getProtectionDomain</code></td>   *   <td><code>getProtectionDomain</code></td>
131   *   <td></td></tr>   *   <td>retrieve a class's ProtectionDomain</td>
132     *   <td>rogue code can gain information about the security policy, to
133     *       prepare a better attack</td></tr>
134   * <tr>   * <tr>
135   *   <td><code>readFileDescriptor</code></td>   *   <td><code>readFileDescriptor</code></td>
136   *   <td></td></tr>   *   <td>read a file descriptor</td>
137   * <tr>   *   <td>rogue code can read sensitive information</td></tr>
  *   <td><code>writeFileDescriptor</code</td>  
  *   <td></td></tr>  
  * <tr>  
  *   <td><code>loadLibrary.{library name}</code></td>  
  *   <td></td></tr>  
  * <tr>  
  *   <td><code>accessClassInPackage.{package name}</code></td>  
  *   <td></td></tr>  
138   * <tr>   * <tr>
139   *   <td><code>defineClassInPackage.{package name}</code></td>   *   <td><code>writeFileDescriptor</code></td>
140   *   <td></td></tr>   *   <td>write a file descriptor</td>
141     *   <td>rogue code can write files, including viruses, and can modify the
142     *       virtual machine binary; if not just fill up the disk</td></tr>
143     * <tr>
144     *   <td><code>loadLibrary.<code><em>library name</em></td>
145     *   <td>dynamic linking of the named library</td>
146     *   <td>native code can bypass many security checks of pure Java</td></tr>
147     * <tr>
148     *   <td><code>accessClassInPackage.</code><em>package name</em></td>
149     *   <td>access to a package via a ClassLoader</td>
150     *   <td>rogue code can access classes not normally available</td></tr>
151     * <tr>
152     *   <td><code>defineClassInPackage.</code><em>package name</em></td>
153     *   <td>define a class inside a given package</td>
154     *   <td>rogue code can install rogue classes, including in trusted packages
155     *       like java.security or java.lang</td></tr>
156   * <tr>   * <tr>
157   *   <td><code>accessDeclaredMembers</code></td>   *   <td><code>accessDeclaredMembers</code></td>
158   *   <td></td></tr>   *   <td>access declared class members via reflection</td>
159     *   <td>rogue code can discover information, invoke methods, or modify fields
160     *       that are not otherwise available</td></tr>
161   * <tr>   * <tr>
162   *   <td><code>queuePrintJob</code></td>   *   <td><code>queuePrintJob</code></td>
163   *   <td></td></tr>   *   <td>initiate a print job</td>
164     *   <td>rogue code could make a hard copy of sensitive information, or
165     *       simply waste paper</td></tr>
166   * </table>   * </table>
167   *   *
  * @since JDK 1.2  
  *  
168   * @author Brian Jones   * @author Brian Jones
169     * @author Eric Blake <ebb9@email.byu.edu>
170     * @see BasicPermission
171     * @see Permission
172     * @see SecurityManager
173     * @since 1.2
174     * @status updated to 1.4
175   */   */
176  public final class RuntimePermission extends java.security.BasicPermission  public final class RuntimePermission extends BasicPermission
177  {  {
178    /**    /**
179     *     * Compatible with JDK 1.2+.
180       */
181      private static final long serialVersionUID = 7399184964622342223L;
182    
183      /**
184       * Create a new permission with the specified name.
185       *
186     * @param permissionName the name of the granted permission     * @param permissionName the name of the granted permission
187     *     * @throws NullPointerException if name is null
188     * @throws IllegalArgumentException thrown if the name contains an invalid     * @throws IllegalArgumentException thrown if name is empty or invalid
    * wildcard character  
189     */     */
190    public RuntimePermission(String permissionName)    public RuntimePermission(String permissionName)
191      {      {
192        this(permissionName, null);        super(permissionName);
193      }      }
194    
195    /**    /**
196       * Create a new permission with the specified name. The actions argument
197       * is ignored, as runtime permissions have no actions.
198     *     *
199     * @param permissionName the name of the granted permission     * @param permissionName the name of the granted permission
200     * @param actions this should always be null     * @param actions ignored
201     *     * @throws NullPointerException if name is null
202     * @throws IllegalArgumentException throw if the name contains an invalid     * @throws IllegalArgumentException thrown if name is empty or invalid
    * wildcard character  
203     */     */
204    public RuntimePermission(String permissionName, String actions)    public RuntimePermission(String permissionName, String actions)
205      {    {
206        super(permissionName, actions);      super(permissionName);
207      }    }
208  }  }

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