Source for java.lang.RuntimePermission

   1: /* RuntimePermission.java -- permission for a secure runtime action
   2:    Copyright (C) 1998, 2000, 2002, 2005  Free Software Foundation, Inc.
   3: 
   4: This file is part of GNU Classpath.
   5: 
   6: GNU Classpath is free software; you can redistribute it and/or modify
   7: 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)
   9: any later version.
  10: 
  11: GNU Classpath is distributed in the hope that it will be useful, but
  12: WITHOUT ANY WARRANTY; without even the implied warranty of
  13: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14: General Public License for more details.
  15: 
  16: You should have received a copy of the GNU General Public License
  17: along with GNU Classpath; see the file COPYING.  If not, write to the
  18: Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  19: 02110-1301 USA.
  20: 
  21: Linking this library statically or dynamically with other modules is
  22: making a combined work based on this library.  Thus, the terms and
  23: conditions of the GNU General Public License cover the whole
  24: combination.
  25: 
  26: As a special exception, the copyright holders of this library give you
  27: permission to link this library with independent modules to produce an
  28: executable, regardless of the license terms of these independent
  29: modules, and to copy and distribute the resulting executable under
  30: terms of your choice, provided that you also meet, for each linked
  31: independent module, the terms and conditions of the license of that
  32: module.  An independent module is a module which is not derived from
  33: or based on this library.  If you modify this library, you may extend
  34: this exception to your version of the library, but you are not
  35: obligated to do so.  If you do not wish to do so, delete this
  36: exception statement from your version. */
  37: 
  38: 
  39: package java.lang;
  40: 
  41: import java.security.BasicPermission;
  42: 
  43: /**
  44:  * A <code>RuntimePermission</code> contains a permission name, but no
  45:  * actions list.  This means you either have the permission or you don't.
  46:  *
  47:  * Permission names have the follow the hierarchial property naming
  48:  * convention.  In addition, an asterisk may appear at the end of a
  49:  * name if following a period or by itself.
  50:  *
  51:  * <table border=1>
  52:  * <tr><th>Valid names</th><th>Invalid names</th></tr>
  53:  * <tr><td>"accessClassInPackage.*","*"</td>
  54:  * <td>"**", "*x", "*.a"</td></tr>
  55:  * </table>
  56:  * <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>
  61:  * <tr><th>Permission Name</th><th>Permission Allows</th><th>Risks</th</tr>
  62:  * <tr>
  63:  *   <td><code>createClassLoader</code></td>
  64:  *   <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>
  68:  *   <td><code>getClassLoader</code></td>
  69:  *   <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>
  72:  *   <td><code>setContextClassLoader</code></td>
  73:  *   <td>allows the setting of the context class loader used by a thread</td>
  74:  *   <td>rogue code could change the context class loader needed by system
  75:  *       threads</td></tr>
  76:  * <tr>
  77:  *   <td><code>setSecurityManager</code></td>
  78:  *   <td>allows the application to replace the security manager</td>
  79:  *   <td>the new manager may be less restrictive, so that rogue code can
  80:  *       bypass existing security checks</td></tr>
  81:  * <tr>
  82:  *   <td><code>createSecurityManager</code></td>
  83:  *   <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>
  87:  *   <td><code>exitVM</code></td>
  88:  *   <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>
  97:  *   <td><code>setFactory</code></td>
  98:  *   <td>allows the application to set the socket factory for socket,
  99:  *       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>
 103:  *   <td><code>setIO</code></td>
 104:  *   <td>allows the application to set System.out, System.in, and
 105:  *       System.err</td>
 106:  *   <td>rogue code could sniff user input and intercept or mangle
 107:  *       output</td></tr>
 108:  * <tr>
 109:  *   <td><code>modifyThread</code></td>
 110:  *   <td>allows the application to modify any thread in the virtual machine
 111:  *       using any of the methods <code>stop</code>, <code>resume</code>,
 112:  *       <code>suspend</code>, <code>setPriority</code>, and
 113:  *       <code>setName</code> of classs <code>Thread</code></td>
 114:  *   <td>rogue code could adversely modify system or user threads</td></tr>
 115:  * <tr>
 116:  *   <td><code>stopThread</code></td>
 117:  *   <td>allows the application to <code>stop</code> any thread it has
 118:  *       access to in the system</td>
 119:  *   <td>rogue code can stop arbitrary threads</td></tr>
 120:  * <tr>
 121:  *   <td><code>modifyThreadGroup</code></td>
 122:  *   <td>allows the application to modify thread groups using any of the
 123:  *       methods <code>destroy</code>, <code>resume</code>,
 124:  *       <code>setDaemon</code>, <code>setMaxPriority</code>,
 125:  *       <code>stop</code>, and <code>suspend</code> of the class
 126:  *       <code>ThreadGroup</code></td>
 127:  *   <td>rogue code can mount a denial-of-service attack by changing run
 128:  *       priorities</td></tr>
 129:  * <tr>
 130:  *   <td><code>getProtectionDomain</code></td>
 131:  *   <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>
 135:  *   <td><code>readFileDescriptor</code></td>
 136:  *   <td>read a file descriptor</td>
 137:  *   <td>rogue code can read sensitive information</td></tr>
 138:  * <tr>
 139:  *   <td><code>writeFileDescriptor</code></td>
 140:  *   <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>
 157:  *   <td><code>accessDeclaredMembers</code></td>
 158:  *   <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>
 162:  *   <td><code>queuePrintJob</code></td>
 163:  *   <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>
 167:  *
 168:  * @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 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
 187:    * @throws NullPointerException if name is null
 188:    * @throws IllegalArgumentException thrown if name is empty or invalid
 189:    */
 190:   public RuntimePermission(String permissionName)
 191:     {
 192:       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
 200:    * @param actions ignored
 201:    * @throws NullPointerException if name is null
 202:    * @throws IllegalArgumentException thrown if name is empty or invalid
 203:    */
 204:   public RuntimePermission(String permissionName, String actions)
 205:   {
 206:     super(permissionName);
 207:   }
 208: }