1065 lines
41 KiB
Java
1065 lines
41 KiB
Java
/* SecurityManager.java -- security checks for privileged actions
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Copyright (C) 1998, 1999, 2001, 2002, 2005 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., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 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.awt.AWTPermission;
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import java.io.File;
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import java.io.FileDescriptor;
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import java.io.FilePermission;
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import java.lang.reflect.Member;
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import java.net.InetAddress;
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import java.net.SocketPermission;
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import java.security.AllPermission;
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import java.security.Permission;
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import java.security.Security;
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import java.security.SecurityPermission;
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import java.util.PropertyPermission;
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/**
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* SecurityManager is a class you can extend to create your own Java
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* security policy. By default, there is no SecurityManager installed in
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* 1.1, which means that all things are permitted to all people. The security
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* manager, if set, is consulted before doing anything with potentially
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* dangerous results, and throws a <code>SecurityException</code> if the
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* action is forbidden.
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*
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* <p>A typical check is as follows, just before the dangerous operation:<br>
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* <pre>
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* SecurityManager sm = System.getSecurityManager();
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* if (sm != null)
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* sm.checkABC(<em>argument</em>, ...);
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* </pre>
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* Note that this is thread-safe, by caching the security manager in a local
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* variable rather than risking a NullPointerException if the mangager is
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* changed between the check for null and before the permission check.
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*
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* <p>The special method <code>checkPermission</code> is a catchall, and
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* the default implementation calls
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* <code>AccessController.checkPermission</code>. In fact, all the other
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* methods default to calling checkPermission.
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*
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* <p>Sometimes, the security check needs to happen from a different context,
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* such as when called from a worker thread. In such cases, use
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* <code>getSecurityContext</code> to take a snapshot that can be passed
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* to the worker thread:<br>
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* <pre>
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* Object context = null;
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* SecurityManager sm = System.getSecurityManager();
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* if (sm != null)
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* context = sm.getSecurityContext(); // defaults to an AccessControlContext
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* // now, in worker thread
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* if (sm != null)
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* sm.checkPermission(permission, context);
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* </pre>
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*
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* <p>Permissions fall into these categories: File, Socket, Net, Security,
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* Runtime, Property, AWT, Reflect, and Serializable. Each of these
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* permissions have a property naming convention, that follows a hierarchical
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* naming convention, to make it easy to grant or deny several permissions
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* at once. Some permissions also take a list of permitted actions, such
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* as "read" or "write", to fine-tune control even more. The permission
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* <code>java.security.AllPermission</code> grants all permissions.
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*
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* <p>The default methods in this class deny all things to all people. You
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* must explicitly grant permission for anything you want to be legal when
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* subclassing this class.
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*
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* @author John Keiser
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* @author Eric Blake (ebb9@email.byu.edu)
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* @see ClassLoader
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* @see SecurityException
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* @see #checkTopLevelWindow(Object)
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* @see System#getSecurityManager()
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* @see System#setSecurityManager(SecurityManager)
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* @see AccessController
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* @see AccessControlContext
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* @see AccessControlException
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* @see Permission
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* @see BasicPermission
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* @see java.io.FilePermission
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* @see java.net.SocketPermission
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* @see java.util.PropertyPermission
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* @see RuntimePermission
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* @see java.awt.AWTPermission
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* @see Policy
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* @see SecurityPermission
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* @see ProtectionDomain
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* @since 1.0
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* @status still missing 1.4 functionality
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*/
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public class SecurityManager
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{
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/**
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* The current security manager. This is located here instead of in
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* System, to avoid security problems, as well as bootstrap issues.
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* Make sure to access it in a thread-safe manner; it is package visible
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* to avoid overhead in java.lang.
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*/
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static volatile SecurityManager current;
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/**
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* Tells whether or not the SecurityManager is currently performing a
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* security check.
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* @deprecated Use {@link #checkPermission(Permission)} instead.
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*/
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protected boolean inCheck;
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/**
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* Construct a new security manager. There may be a security check, of
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* <code>RuntimePermission("createSecurityManager")</code>.
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*
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* @throws SecurityException if permission is denied
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*/
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public SecurityManager()
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{
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SecurityManager sm = System.getSecurityManager();
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if (sm != null)
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sm.checkPermission(new RuntimePermission("createSecurityManager"));
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}
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/**
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* Tells whether or not the SecurityManager is currently performing a
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* security check.
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*
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* @return true if the SecurityManager is in a security check
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* @see #inCheck
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* @deprecated use {@link #checkPermission(Permission)} instead
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*/
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public boolean getInCheck()
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{
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return inCheck;
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}
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/**
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* Get a list of all the classes currently executing methods on the Java
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* stack. getClassContext()[0] is the currently executing method (ie. the
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* class that CALLED getClassContext, not SecurityManager).
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*
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* @return an array of classes on the Java execution stack
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*/
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protected Class[] getClassContext()
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{
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return VMSecurityManager.getClassContext(SecurityManager.class);
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}
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/**
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* Find the ClassLoader of the first non-system class on the execution
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* stack. A non-system class is one whose ClassLoader is not equal to
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* {@link ClassLoader#getSystemClassLoader()} or its ancestors. This
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* will return null in three cases:
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*
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* <ul>
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* <li>All methods on the stack are from system classes</li>
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* <li>All methods on the stack up to the first "privileged" caller, as
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* created by {@link AccessController.doPrivileged(PrivilegedAction)},
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* are from system classes</li>
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* <li>A check of <code>java.security.AllPermission</code> succeeds.</li>
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* </ul>
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*
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* @return the most recent non-system ClassLoader on the execution stack
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* @deprecated use {@link #checkPermission(Permission)} instead
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*/
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protected ClassLoader currentClassLoader()
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{
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return VMSecurityManager.currentClassLoader(SecurityManager.class);
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}
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/**
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* Find the first non-system class on the execution stack. A non-system
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* class is one whose ClassLoader is not equal to
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* {@link ClassLoader#getSystemClassLoader()} or its ancestors. This
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* will return null in three cases:
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*
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* <ul>
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* <li>All methods on the stack are from system classes</li>
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* <li>All methods on the stack up to the first "privileged" caller, as
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* created by {@link AccessController.doPrivileged(PrivilegedAction)},
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* are from system classes</li>
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* <li>A check of <code>java.security.AllPermission</code> succeeds.</li>
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* </ul>
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*
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* @return the most recent non-system Class on the execution stack
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* @deprecated use {@link #checkPermission(Permission)} instead
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*/
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protected Class currentLoadedClass()
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{
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int i = classLoaderDepth();
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return i >= 0 ? getClassContext()[i] : null;
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}
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/**
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* Get the depth of a particular class on the execution stack.
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*
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* @param className the fully-qualified name to search for
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* @return the index of the class on the stack, or -1
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* @deprecated use {@link #checkPermission(Permission)} instead
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*/
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protected int classDepth(String className)
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{
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Class[] c = getClassContext();
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for (int i = 0; i < c.length; i++)
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if (className.equals(c[i].getName()))
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return i;
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return -1;
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}
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/**
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* Get the depth on the execution stack of the most recent non-system class.
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* A non-system class is one whose ClassLoader is not equal to
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* {@link ClassLoader#getSystemClassLoader()} or its ancestors. This
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* will return -1 in three cases:
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*
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* <ul>
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* <li>All methods on the stack are from system classes</li>
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* <li>All methods on the stack up to the first "privileged" caller, as
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* created by {@link AccessController.doPrivileged(PrivilegedAction)},
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* are from system classes</li>
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* <li>A check of <code>java.security.AllPermission</code> succeeds.</li>
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* </ul>
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*
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* @return the index of the most recent non-system Class on the stack
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* @deprecated use {@link #checkPermission(Permission)} instead
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*/
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protected int classLoaderDepth()
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{
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try
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{
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checkPermission(new AllPermission());
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}
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catch (SecurityException e)
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{
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Class[] c = getClassContext();
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for (int i = 0; i < c.length; i++)
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if (c[i].getClassLoader() != null)
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// XXX Check if c[i] is AccessController, or a system class.
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return i;
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}
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return -1;
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}
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/**
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* Tell whether the specified class is on the execution stack.
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*
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* @param className the fully-qualified name of the class to find
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* @return whether the specified class is on the execution stack
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* @deprecated use {@link #checkPermission(Permission)} instead
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*/
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protected boolean inClass(String className)
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{
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return classDepth(className) != -1;
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}
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/**
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* Tell whether there is a class loaded with an explicit ClassLoader on
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* the stack.
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*
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* @return whether a class with an explicit ClassLoader is on the stack
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* @deprecated use {@link #checkPermission(Permission)} instead
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*/
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protected boolean inClassLoader()
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{
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return classLoaderDepth() != -1;
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}
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/**
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* Get an implementation-dependent Object that contains enough information
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* about the current environment to be able to perform standard security
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* checks later. This is used by trusted methods that need to verify that
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* their callers have sufficient access to perform certain operations.
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*
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* <p>Currently the only methods that use this are checkRead() and
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* checkConnect(). The default implementation returns an
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* <code>AccessControlContext</code>.
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*
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* @return a security context
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* @see #checkConnect(String, int, Object)
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* @see #checkRead(String, Object)
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* @see AccessControlContext
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* @see AccessController#getContext()
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*/
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public Object getSecurityContext()
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{
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// XXX Should be: return AccessController.getContext();
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return new SecurityContext(getClassContext());
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}
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/**
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* Check if the current thread is allowed to perform an operation that
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* requires the specified <code>Permission</code>. This defaults to
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* <code>AccessController.checkPermission</code>.
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*
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* @param perm the <code>Permission</code> required
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* @throws SecurityException if permission is denied
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* @throws NullPointerException if perm is null
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* @since 1.2
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*/
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public void checkPermission(Permission perm)
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{
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// XXX Should be: AccessController.checkPermission(perm);
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//.throw new SecurityException("Operation not allowed");
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}
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/**
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* Check if the current thread is allowed to perform an operation that
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* requires the specified <code>Permission</code>. This is done in a
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* context previously returned by <code>getSecurityContext()</code>. The
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* default implementation expects context to be an AccessControlContext,
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* and it calls <code>AccessControlContext.checkPermission(perm)</code>.
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*
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* @param perm the <code>Permission</code> required
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* @param context a security context
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* @throws SecurityException if permission is denied, or if context is
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* not an AccessControlContext
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* @throws NullPointerException if perm is null
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* @see #getSecurityContext()
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* @see AccessControlContext#checkPermission(Permission)
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* @since 1.2
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*/
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public void checkPermission(Permission perm, Object context)
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{
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// XXX Should be:
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// if (! (context instanceof AccessControlContext))
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// throw new SecurityException("Missing context");
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// ((AccessControlContext) context).checkPermission(perm);
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throw new SecurityException("Operation not allowed");
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}
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/**
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* Check if the current thread is allowed to create a ClassLoader. This
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* method is called from ClassLoader.ClassLoader(), and checks
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* <code>RuntimePermission("createClassLoader")</code>. If you override
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* this, you should call <code>super.checkCreateClassLoader()</code> rather
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* than throwing an exception.
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*
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* @throws SecurityException if permission is denied
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* @see ClassLoader#ClassLoader()
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*/
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public void checkCreateClassLoader()
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{
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checkPermission(new RuntimePermission("createClassLoader"));
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}
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/**
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* Check if the current thread is allowed to modify another Thread. This is
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* called by Thread.stop(), suspend(), resume(), interrupt(), destroy(),
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* setPriority(), setName(), and setDaemon(). The default implementation
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* checks <code>RuntimePermission("modifyThread")</code> on system threads
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* (ie. threads in ThreadGroup with a null parent), and returns silently on
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* other threads.
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*
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* <p>If you override this, you must do two things. First, call
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* <code>super.checkAccess(t)</code>, to make sure you are not relaxing
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* requirements. Second, if the calling thread has
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* <code>RuntimePermission("modifyThread")</code>, return silently, so that
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* core classes (the Classpath library!) can modify any thread.
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*
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* @param thread the other Thread to check
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* @throws SecurityException if permission is denied
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* @throws NullPointerException if thread is null
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* @see Thread#stop()
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* @see Thread#suspend()
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* @see Thread#resume()
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* @see Thread#setPriority(int)
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* @see Thread#setName(String)
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* @see Thread#setDaemon(boolean)
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*/
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public void checkAccess(Thread thread)
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{
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if (thread.getThreadGroup() != null
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&& thread.getThreadGroup().getParent() != null)
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checkPermission(new RuntimePermission("modifyThread"));
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}
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/**
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* Check if the current thread is allowed to modify a ThreadGroup. This is
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* called by Thread.Thread() (to add a thread to the ThreadGroup),
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* ThreadGroup.ThreadGroup() (to add this ThreadGroup to a parent),
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* ThreadGroup.stop(), suspend(), resume(), interrupt(), destroy(),
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* setDaemon(), and setMaxPriority(). The default implementation
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* checks <code>RuntimePermission("modifyThread")</code> on the system group
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* (ie. the one with a null parent), and returns silently on other groups.
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*
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* <p>If you override this, you must do two things. First, call
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* <code>super.checkAccess(t)</code>, to make sure you are not relaxing
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* requirements. Second, if the calling thread has
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* <code>RuntimePermission("modifyThreadGroup")</code>, return silently,
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* so that core classes (the Classpath library!) can modify any thread.
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*
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* @param g the ThreadGroup to check
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* @throws SecurityException if permission is denied
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* @throws NullPointerException if g is null
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* @see Thread#Thread()
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* @see ThreadGroup#ThreadGroup()
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* @see ThreadGroup#stop()
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* @see ThreadGroup#suspend()
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* @see ThreadGroup#resume()
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* @see ThreadGroup#interrupt()
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* @see ThreadGroup#setDaemon(boolean)
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* @see ThreadGroup#setMaxPriority(int)
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*/
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public void checkAccess(ThreadGroup g)
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{
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if (g.getParent() != null)
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checkPermission(new RuntimePermission("modifyThreadGroup"));
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}
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/**
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* Check if the current thread is allowed to exit the JVM with the given
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* status. This method is called from Runtime.exit() and Runtime.halt().
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* The default implementation checks
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* <code>RuntimePermission("exitVM")</code>. If you override this, call
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* <code>super.checkExit</code> rather than throwing an exception.
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*
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* @param status the status to exit with
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* @throws SecurityException if permission is denied
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* @see Runtime#exit(int)
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* @see Runtime#halt(int)
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*/
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public void checkExit(int status)
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{
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checkPermission(new RuntimePermission("exitVM"));
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}
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/**
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* Check if the current thread is allowed to execute the given program. This
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* method is called from Runtime.exec(). If the name is an absolute path,
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* the default implementation checks
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* <code>FilePermission(program, "execute")</code>, otherwise it checks
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* <code>FilePermission("<<ALL FILES>>", "execute")</code>. If
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* you override this, call <code>super.checkExec</code> rather than
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* throwing an exception.
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*
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* @param program the name of the program to exec
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* @throws SecurityException if permission is denied
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* @throws NullPointerException if program is null
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* @see Runtime#exec(String[], String[], File)
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*/
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public void checkExec(String program)
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{
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if (! program.equals(new File(program).getAbsolutePath()))
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program = "<<ALL FILES>>";
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checkPermission(new FilePermission(program, "execute"));
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}
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/**
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* Check if the current thread is allowed to link in the given native
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* library. This method is called from Runtime.load() (and hence, by
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* loadLibrary() as well). The default implementation checks
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* <code>RuntimePermission("loadLibrary." + filename)</code>. If you
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* override this, call <code>super.checkLink</code> rather than throwing
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* an exception.
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*
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* @param filename the full name of the library to load
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* @throws SecurityException if permission is denied
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* @throws NullPointerException if filename is null
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* @see Runtime#load(String)
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*/
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public void checkLink(String filename)
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{
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// Use the toString() hack to do the null check.
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checkPermission(new RuntimePermission("loadLibrary."
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+ filename.toString()));
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}
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|
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/**
|
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* Check if the current thread is allowed to read the given file using the
|
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* FileDescriptor. This method is called from
|
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* FileInputStream.FileInputStream(). The default implementation checks
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|
* <code>RuntimePermission("readFileDescriptor")</code>. If you override
|
|
* this, call <code>super.checkRead</code> rather than throwing an
|
|
* exception.
|
|
*
|
|
* @param desc the FileDescriptor representing the file to access
|
|
* @throws SecurityException if permission is denied
|
|
* @throws NullPointerException if desc is null
|
|
* @see FileInputStream#FileInputStream(FileDescriptor)
|
|
*/
|
|
public void checkRead(FileDescriptor desc)
|
|
{
|
|
if (desc == null)
|
|
throw new NullPointerException();
|
|
checkPermission(new RuntimePermission("readFileDescriptor"));
|
|
}
|
|
|
|
/**
|
|
* Check if the current thread is allowed to read the given file. This
|
|
* method is called from FileInputStream.FileInputStream(),
|
|
* RandomAccessFile.RandomAccessFile(), File.exists(), canRead(), isFile(),
|
|
* isDirectory(), lastModified(), length() and list(). The default
|
|
* implementation checks <code>FilePermission(filename, "read")</code>. If
|
|
* you override this, call <code>super.checkRead</code> rather than
|
|
* throwing an exception.
|
|
*
|
|
* @param filename the full name of the file to access
|
|
* @throws SecurityException if permission is denied
|
|
* @throws NullPointerException if filename is null
|
|
* @see File
|
|
* @see FileInputStream#FileInputStream(String)
|
|
* @see RandomAccessFile#RandomAccessFile(String)
|
|
*/
|
|
public void checkRead(String filename)
|
|
{
|
|
checkPermission(new FilePermission(filename, "read"));
|
|
}
|
|
|
|
/**
|
|
* Check if the current thread is allowed to read the given file. using the
|
|
* given security context. The context must be a result of a previous call
|
|
* to <code>getSecurityContext()</code>. The default implementation checks
|
|
* <code>AccessControlContext.checkPermission(new FilePermission(filename,
|
|
* "read"))</code>. If you override this, call <code>super.checkRead</code>
|
|
* rather than throwing an exception.
|
|
*
|
|
* @param filename the full name of the file to access
|
|
* @param context the context to determine access for
|
|
* @throws SecurityException if permission is denied, or if context is
|
|
* not an AccessControlContext
|
|
* @throws NullPointerException if filename is null
|
|
* @see #getSecurityContext()
|
|
* @see AccessControlContext#checkPermission(Permission)
|
|
*/
|
|
public void checkRead(String filename, Object context)
|
|
{
|
|
// XXX Should be:
|
|
// if (! (context instanceof AccessControlContext))
|
|
// throw new SecurityException("Missing context");
|
|
// AccessControlContext ac = (AccessControlContext) context;
|
|
// ac.checkPermission(new FilePermission(filename, "read"));
|
|
// throw new SecurityException("Cannot read files via file names.");
|
|
}
|
|
|
|
/**
|
|
* Check if the current thread is allowed to write the given file using the
|
|
* FileDescriptor. This method is called from
|
|
* FileOutputStream.FileOutputStream(). The default implementation checks
|
|
* <code>RuntimePermission("writeFileDescriptor")</code>. If you override
|
|
* this, call <code>super.checkWrite</code> rather than throwing an
|
|
* exception.
|
|
*
|
|
* @param desc the FileDescriptor representing the file to access
|
|
* @throws SecurityException if permission is denied
|
|
* @throws NullPointerException if desc is null
|
|
* @see FileOutputStream#FileOutputStream(FileDescriptor)
|
|
*/
|
|
public void checkWrite(FileDescriptor desc)
|
|
{
|
|
if (desc == null)
|
|
throw new NullPointerException();
|
|
checkPermission(new RuntimePermission("writeFileDescriptor"));
|
|
}
|
|
|
|
/**
|
|
* Check if the current thread is allowed to write the given file. This
|
|
* method is called from FileOutputStream.FileOutputStream(),
|
|
* RandomAccessFile.RandomAccessFile(), File.canWrite(), mkdir(), and
|
|
* renameTo(). The default implementation checks
|
|
* <code>FilePermission(filename, "write")</code>. If you override this,
|
|
* call <code>super.checkWrite</code> rather than throwing an exception.
|
|
*
|
|
* @param filename the full name of the file to access
|
|
* @throws SecurityException if permission is denied
|
|
* @throws NullPointerException if filename is null
|
|
* @see File
|
|
* @see File#canWrite()
|
|
* @see File#mkdir()
|
|
* @see File#renameTo()
|
|
* @see FileOutputStream#FileOutputStream(String)
|
|
* @see RandomAccessFile#RandomAccessFile(String)
|
|
*/
|
|
public void checkWrite(String filename)
|
|
{
|
|
checkPermission(new FilePermission(filename, "write"));
|
|
}
|
|
|
|
/**
|
|
* Check if the current thread is allowed to delete the given file. This
|
|
* method is called from File.delete(). The default implementation checks
|
|
* <code>FilePermission(filename, "delete")</code>. If you override this,
|
|
* call <code>super.checkDelete</code> rather than throwing an exception.
|
|
*
|
|
* @param filename the full name of the file to delete
|
|
* @throws SecurityException if permission is denied
|
|
* @throws NullPointerException if filename is null
|
|
* @see File#delete()
|
|
*/
|
|
public void checkDelete(String filename)
|
|
{
|
|
checkPermission(new FilePermission(filename, "delete"));
|
|
}
|
|
|
|
/**
|
|
* Check if the current thread is allowed to connect to a given host on a
|
|
* given port. This method is called from Socket.Socket(). A port number
|
|
* of -1 indicates the caller is attempting to determine an IP address, so
|
|
* the default implementation checks
|
|
* <code>SocketPermission(host, "resolve")</code>. Otherwise, the default
|
|
* implementation checks
|
|
* <code>SocketPermission(host + ":" + port, "connect")</code>. If you
|
|
* override this, call <code>super.checkConnect</code> rather than throwing
|
|
* an exception.
|
|
*
|
|
* @param host the host to connect to
|
|
* @param port the port to connect on
|
|
* @throws SecurityException if permission is denied
|
|
* @throws NullPointerException if host is null
|
|
* @see Socket#Socket()
|
|
*/
|
|
public void checkConnect(String host, int port)
|
|
{
|
|
if (port == -1)
|
|
checkPermission(new SocketPermission(host, "resolve"));
|
|
else
|
|
// Use the toString() hack to do the null check.
|
|
checkPermission(new SocketPermission(host.toString() + ":" + port,
|
|
"connect"));
|
|
}
|
|
|
|
/**
|
|
* Check if the current thread is allowed to connect to a given host on a
|
|
* given port, using the given security context. The context must be a
|
|
* result of a previous call to <code>getSecurityContext</code>. A port
|
|
* number of -1 indicates the caller is attempting to determine an IP
|
|
* address, so the default implementation checks
|
|
* <code>AccessControlContext.checkPermission(new SocketPermission(host,
|
|
* "resolve"))</code>. Otherwise, the default implementation checks
|
|
* <code>AccessControlContext.checkPermission(new SocketPermission(host
|
|
* + ":" + port, "connect"))</code>. If you override this, call
|
|
* <code>super.checkConnect</code> rather than throwing an exception.
|
|
*
|
|
* @param host the host to connect to
|
|
* @param port the port to connect on
|
|
* @param context the context to determine access for
|
|
*
|
|
* @throws SecurityException if permission is denied, or if context is
|
|
* not an AccessControlContext
|
|
* @throws NullPointerException if host is null
|
|
*
|
|
* @see #getSecurityContext()
|
|
* @see AccessControlContext#checkPermission(Permission)
|
|
*/
|
|
public void checkConnect(String host, int port, Object context)
|
|
{
|
|
// XXX Should be:
|
|
// if (! (context instanceof AccessControlContext))
|
|
// throw new SecurityException("Missing context");
|
|
// AccessControlContext ac = (AccessControlContext) context;
|
|
// if (port == -1)
|
|
// ac.checkPermission(new SocketPermission(host, "resolve"));
|
|
// else
|
|
// // Use the toString() hack to do the null check.
|
|
// ac.checkPermission(new SocketPermission(host.toString + ":" +port,
|
|
// "connect"));
|
|
// throw new SecurityException("Cannot make network connections.");
|
|
}
|
|
|
|
/**
|
|
* Check if the current thread is allowed to listen to a specific port for
|
|
* data. This method is called by ServerSocket.ServerSocket(). The default
|
|
* implementation checks
|
|
* <code>SocketPermission("localhost:" + (port == 0 ? "1024-" : "" + port),
|
|
* "listen")</code>. If you override this, call
|
|
* <code>super.checkListen</code> rather than throwing an exception.
|
|
*
|
|
* @param port the port to listen on
|
|
* @throws SecurityException if permission is denied
|
|
* @see ServerSocket#ServerSocket(int)
|
|
*/
|
|
public void checkListen(int port)
|
|
{
|
|
checkPermission(new SocketPermission("localhost:"
|
|
+ (port == 0 ? "1024-" : "" +port),
|
|
"listen"));
|
|
}
|
|
|
|
/**
|
|
* Check if the current thread is allowed to accept a connection from a
|
|
* particular host on a particular port. This method is called by
|
|
* ServerSocket.implAccept(). The default implementation checks
|
|
* <code>SocketPermission(host + ":" + port, "accept")</code>. If you
|
|
* override this, call <code>super.checkAccept</code> rather than throwing
|
|
* an exception.
|
|
*
|
|
* @param host the host which wishes to connect
|
|
* @param port the port the connection will be on
|
|
* @throws SecurityException if permission is denied
|
|
* @throws NullPointerException if host is null
|
|
* @see ServerSocket#accept()
|
|
*/
|
|
public void checkAccept(String host, int port)
|
|
{
|
|
// Use the toString() hack to do the null check.
|
|
checkPermission(new SocketPermission(host.toString() + ":" + port,
|
|
"accept"));
|
|
}
|
|
|
|
/**
|
|
* Check if the current thread is allowed to read and write multicast to
|
|
* a particular address. The default implementation checks
|
|
* <code>SocketPermission(addr.getHostAddress(), "accept,connect")</code>.
|
|
* If you override this, call <code>super.checkMulticast</code> rather than
|
|
* throwing an exception.
|
|
*
|
|
* @param addr the address to multicast to
|
|
* @throws SecurityException if permission is denied
|
|
* @throws NullPointerException if host is null
|
|
* @since 1.1
|
|
*/
|
|
public void checkMulticast(InetAddress addr)
|
|
{
|
|
checkPermission(new SocketPermission(addr.getHostAddress(),
|
|
"accept,connect"));
|
|
}
|
|
|
|
/**
|
|
*Check if the current thread is allowed to read and write multicast to
|
|
* a particular address with a particular ttl (time-to-live) value. The
|
|
* default implementation ignores ttl, and checks
|
|
* <code>SocketPermission(addr.getHostAddress(), "accept,connect")</code>.
|
|
* If you override this, call <code>super.checkMulticast</code> rather than
|
|
* throwing an exception.
|
|
*
|
|
* @param addr the address to multicast to
|
|
* @param ttl value in use for multicast send
|
|
* @throws SecurityException if permission is denied
|
|
* @throws NullPointerException if host is null
|
|
* @since 1.1
|
|
* @deprecated use {@link #checkPermission(Permission)} instead
|
|
*/
|
|
public void checkMulticast(InetAddress addr, byte ttl)
|
|
{
|
|
checkPermission(new SocketPermission(addr.getHostAddress(),
|
|
"accept,connect"));
|
|
}
|
|
|
|
/**
|
|
* Check if the current thread is allowed to read or write all the system
|
|
* properties at once. This method is called by System.getProperties()
|
|
* and setProperties(). The default implementation checks
|
|
* <code>PropertyPermission("*", "read,write")</code>. If you override
|
|
* this, call <code>super.checkPropertiesAccess</code> rather than
|
|
* throwing an exception.
|
|
*
|
|
* @throws SecurityException if permission is denied
|
|
* @see System#getProperties()
|
|
* @see System#setProperties(Properties)
|
|
*/
|
|
public void checkPropertiesAccess()
|
|
{
|
|
checkPermission(new PropertyPermission("*", "read,write"));
|
|
}
|
|
|
|
/**
|
|
* Check if the current thread is allowed to read a particular system
|
|
* property (writes are checked directly via checkPermission). This method
|
|
* is called by System.getProperty() and setProperty(). The default
|
|
* implementation checks <code>PropertyPermission(key, "read")</code>. If
|
|
* you override this, call <code>super.checkPropertyAccess</code> rather
|
|
* than throwing an exception.
|
|
*
|
|
* @param key the key of the property to check
|
|
*
|
|
* @throws SecurityException if permission is denied
|
|
* @throws NullPointerException if key is null
|
|
* @throws IllegalArgumentException if key is ""
|
|
*
|
|
* @see System#getProperty(String)
|
|
*/
|
|
public void checkPropertyAccess(String key)
|
|
{
|
|
checkPermission(new PropertyPermission(key, "read"));
|
|
}
|
|
|
|
/**
|
|
* Check if the current thread is allowed to create a top-level window. If
|
|
* it is not, the operation should still go through, but some sort of
|
|
* nonremovable warning should be placed on the window to show that it
|
|
* is untrusted. This method is called by Window.Window(). The default
|
|
* implementation checks
|
|
* <code>AWTPermission("showWindowWithoutWarningBanner")</code>, and returns
|
|
* true if no exception was thrown. If you override this, use
|
|
* <code>return super.checkTopLevelWindow</code> rather than returning
|
|
* false.
|
|
*
|
|
* @param window the window to create
|
|
* @return true if there is permission to show the window without warning
|
|
* @throws NullPointerException if window is null
|
|
* @see Window#Window(Frame)
|
|
*/
|
|
public boolean checkTopLevelWindow(Object window)
|
|
{
|
|
if (window == null)
|
|
throw new NullPointerException();
|
|
try
|
|
{
|
|
checkPermission(new AWTPermission("showWindowWithoutWarningBanner"));
|
|
return true;
|
|
}
|
|
catch (SecurityException e)
|
|
{
|
|
return false;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Check if the current thread is allowed to create a print job. This
|
|
* method is called by Toolkit.getPrintJob(). The default implementation
|
|
* checks <code>RuntimePermission("queuePrintJob")</code>. If you override
|
|
* this, call <code>super.checkPrintJobAccess</code> rather than throwing
|
|
* an exception.
|
|
*
|
|
* @throws SecurityException if permission is denied
|
|
* @see Toolkit#getPrintJob(Frame, String, Properties)
|
|
* @since 1.1
|
|
*/
|
|
public void checkPrintJobAccess()
|
|
{
|
|
checkPermission(new RuntimePermission("queuePrintJob"));
|
|
}
|
|
|
|
/**
|
|
* Check if the current thread is allowed to use the system clipboard. This
|
|
* method is called by Toolkit.getSystemClipboard(). The default
|
|
* implementation checks <code>AWTPermission("accessClipboard")</code>. If
|
|
* you override this, call <code>super.checkSystemClipboardAccess</code>
|
|
* rather than throwing an exception.
|
|
*
|
|
* @throws SecurityException if permission is denied
|
|
* @see Toolkit#getSystemClipboard()
|
|
* @since 1.1
|
|
*/
|
|
public void checkSystemClipboardAccess()
|
|
{
|
|
checkPermission(new AWTPermission("accessClipboard"));
|
|
}
|
|
|
|
/**
|
|
* Check if the current thread is allowed to use the AWT event queue. This
|
|
* method is called by Toolkit.getSystemEventQueue(). The default
|
|
* implementation checks <code>AWTPermission("accessEventQueue")</code>.
|
|
* you override this, call <code>super.checkAwtEventQueueAccess</code>
|
|
* rather than throwing an exception.
|
|
*
|
|
* @throws SecurityException if permission is denied
|
|
* @see Toolkit#getSystemEventQueue()
|
|
* @since 1.1
|
|
*/
|
|
public void checkAwtEventQueueAccess()
|
|
{
|
|
checkPermission(new AWTPermission("accessEventQueue"));
|
|
}
|
|
|
|
/**
|
|
* Check if the current thread is allowed to access the specified package
|
|
* at all. This method is called by ClassLoader.loadClass() in user-created
|
|
* ClassLoaders. The default implementation gets a list of all restricted
|
|
* packages, via <code>Security.getProperty("package.access")</code>. Then,
|
|
* if packageName starts with or equals any restricted package, it checks
|
|
* <code>RuntimePermission("accessClassInPackage." + packageName)</code>.
|
|
* If you override this, you should call
|
|
* <code>super.checkPackageAccess</code> before doing anything else.
|
|
*
|
|
* @param packageName the package name to check access to
|
|
* @throws SecurityException if permission is denied
|
|
* @throws NullPointerException if packageName is null
|
|
* @see ClassLoader#loadClass(String, boolean)
|
|
* @see Security#getProperty(String)
|
|
*/
|
|
public void checkPackageAccess(String packageName)
|
|
{
|
|
checkPackageList(packageName, "access", "accessClassInPackage.");
|
|
}
|
|
|
|
/**
|
|
* Check if the current thread is allowed to define a class into the
|
|
* specified package. This method is called by ClassLoader.loadClass() in
|
|
* user-created ClassLoaders. The default implementation gets a list of all
|
|
* restricted packages, via
|
|
* <code>Security.getProperty("package.definition")</code>. Then, if
|
|
* packageName starts with or equals any restricted package, it checks
|
|
* <code>RuntimePermission("defineClassInPackage." + packageName)</code>.
|
|
* If you override this, you should call
|
|
* <code>super.checkPackageDefinition</code> before doing anything else.
|
|
*
|
|
* @param packageName the package name to check access to
|
|
* @throws SecurityException if permission is denied
|
|
* @throws NullPointerException if packageName is null
|
|
* @see ClassLoader#loadClass(String, boolean)
|
|
* @see Security#getProperty(String)
|
|
*/
|
|
public void checkPackageDefinition(String packageName)
|
|
{
|
|
checkPackageList(packageName, "definition", "defineClassInPackage.");
|
|
}
|
|
|
|
/**
|
|
* Check if the current thread is allowed to set the current socket factory.
|
|
* This method is called by Socket.setSocketImplFactory(),
|
|
* ServerSocket.setSocketFactory(), and URL.setURLStreamHandlerFactory().
|
|
* The default implementation checks
|
|
* <code>RuntimePermission("setFactory")</code>. If you override this, call
|
|
* <code>super.checkSetFactory</code> rather than throwing an exception.
|
|
*
|
|
* @throws SecurityException if permission is denied
|
|
* @see Socket#setSocketImplFactory(SocketImplFactory)
|
|
* @see ServerSocket#setSocketFactory(SocketImplFactory)
|
|
* @see URL#setURLStreamHandlerFactory(URLStreamHandlerFactory)
|
|
*/
|
|
public void checkSetFactory()
|
|
{
|
|
checkPermission(new RuntimePermission("setFactory"));
|
|
}
|
|
|
|
/**
|
|
* Check if the current thread is allowed to get certain types of Methods,
|
|
* Fields and Constructors from a Class object. This method is called by
|
|
* Class.getMethod[s](), Class.getField[s](), Class.getConstructor[s],
|
|
* Class.getDeclaredMethod[s](), Class.getDeclaredField[s](), and
|
|
* Class.getDeclaredConstructor[s](). The default implementation allows
|
|
* PUBLIC access, and access to classes defined by the same classloader as
|
|
* the code performing the reflection. Otherwise, it checks
|
|
* <code>RuntimePermission("accessDeclaredMembers")</code>. If you override
|
|
* this, do not call <code>super.checkMemberAccess</code>, as this would
|
|
* mess up the stack depth check that determines the ClassLoader requesting
|
|
* the access.
|
|
*
|
|
* @param c the Class to check
|
|
* @param memberType either DECLARED or PUBLIC
|
|
* @throws SecurityException if permission is denied, including when
|
|
* memberType is not DECLARED or PUBLIC
|
|
* @throws NullPointerException if c is null
|
|
* @see Class
|
|
* @see Member#DECLARED
|
|
* @see Member#PUBLIC
|
|
* @since 1.1
|
|
*/
|
|
public void checkMemberAccess(Class c, int memberType)
|
|
{
|
|
if (c == null)
|
|
throw new NullPointerException();
|
|
if (memberType == Member.PUBLIC)
|
|
return;
|
|
// XXX Allow access to classes created by same classloader before next
|
|
// check.
|
|
checkPermission(new RuntimePermission("accessDeclaredMembers"));
|
|
}
|
|
|
|
/**
|
|
* Test whether a particular security action may be taken. The default
|
|
* implementation checks <code>SecurityPermission(action)</code>. If you
|
|
* override this, call <code>super.checkSecurityAccess</code> rather than
|
|
* throwing an exception.
|
|
*
|
|
* @param action the desired action to take
|
|
* @throws SecurityException if permission is denied
|
|
* @throws NullPointerException if action is null
|
|
* @throws IllegalArgumentException if action is ""
|
|
* @since 1.1
|
|
*/
|
|
public void checkSecurityAccess(String action)
|
|
{
|
|
checkPermission(new SecurityPermission(action));
|
|
}
|
|
|
|
/**
|
|
* Get the ThreadGroup that a new Thread should belong to by default. Called
|
|
* by Thread.Thread(). The default implementation returns the current
|
|
* ThreadGroup of the current Thread. <STRONG>Spec Note:</STRONG> it is not
|
|
* clear whether the new Thread is guaranteed to pass the
|
|
* checkAccessThreadGroup() test when using this ThreadGroup, but I presume
|
|
* so.
|
|
*
|
|
* @return the ThreadGroup to put the new Thread into
|
|
* @since 1.1
|
|
*/
|
|
public ThreadGroup getThreadGroup()
|
|
{
|
|
return Thread.currentThread().getThreadGroup();
|
|
}
|
|
|
|
/**
|
|
* Helper that checks a comma-separated list of restricted packages, from
|
|
* <code>Security.getProperty("package.definition")</code>, for the given
|
|
* package access permission. If packageName starts with or equals any
|
|
* restricted package, it checks
|
|
* <code>RuntimePermission(permission + packageName)</code>.
|
|
*
|
|
* @param packageName the package name to check access to
|
|
* @param restriction the list of restrictions, after "package."
|
|
* @param permission the base permission, including the '.'
|
|
* @throws SecurityException if permission is denied
|
|
* @throws NullPointerException if packageName is null
|
|
* @see #checkPackageAccess(String)
|
|
* @see #checkPackageDefinition(String)
|
|
*/
|
|
void checkPackageList(String packageName, String restriction,
|
|
String permission)
|
|
{
|
|
// Use the toString() hack to do the null check.
|
|
Permission p = new RuntimePermission(permission + packageName.toString());
|
|
String list = Security.getProperty("package." + restriction);
|
|
if (list == null)
|
|
return;
|
|
while (! "".equals(packageName))
|
|
{
|
|
for (int index = list.indexOf(packageName);
|
|
index != -1; index = list.indexOf(packageName, index + 1))
|
|
{
|
|
// Exploit package visibility for speed.
|
|
int packageNameCount = packageName.length();
|
|
if (index + packageNameCount == list.length()
|
|
|| list.charAt(index + packageNameCount) == ',')
|
|
{
|
|
checkPermission(p);
|
|
return;
|
|
}
|
|
}
|
|
int index = packageName.lastIndexOf('.');
|
|
packageName = index < 0 ? "" : packageName.substring(0, index);
|
|
}
|
|
}
|
|
} // class SecurityManager
|
|
|
|
// XXX This class is unnecessary.
|
|
class SecurityContext {
|
|
Class[] classes;
|
|
SecurityContext(Class[] classes) {
|
|
this.classes = classes;
|
|
}
|
|
}
|