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1780 lines
73 KiB
1780 lines
73 KiB
/*
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* Copyright (c) 1995, 2013, Oracle and/or its affiliates. All rights reserved.
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* ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*/
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package java.lang;
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import java.security.*;
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import java.io.FileDescriptor;
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import java.io.File;
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import java.io.FilePermission;
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import java.awt.AWTPermission;
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import java.util.PropertyPermission;
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import java.lang.RuntimePermission;
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import java.net.SocketPermission;
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import java.net.NetPermission;
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import java.util.Hashtable;
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import java.net.InetAddress;
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import java.lang.reflect.*;
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import java.net.URL;
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import sun.reflect.CallerSensitive;
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import sun.security.util.SecurityConstants;
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/**
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* The security manager is a class that allows
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* applications to implement a security policy. It allows an
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* application to determine, before performing a possibly unsafe or
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* sensitive operation, what the operation is and whether
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* it is being attempted in a security context that allows the
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* operation to be performed. The
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* application can allow or disallow the operation.
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* <p>
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* The <code>SecurityManager</code> class contains many methods with
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* names that begin with the word <code>check</code>. These methods
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* are called by various methods in the Java libraries before those
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* methods perform certain potentially sensitive operations. The
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* invocation of such a <code>check</code> method typically looks like this:
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* <blockquote><pre>
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* SecurityManager security = System.getSecurityManager();
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* if (security != null) {
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* security.check<i>XXX</i>(argument, . . . );
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* }
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* </pre></blockquote>
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* <p>
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* The security manager is thereby given an opportunity to prevent
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* completion of the operation by throwing an exception. A security
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* manager routine simply returns if the operation is permitted, but
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* throws a <code>SecurityException</code> if the operation is not
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* permitted. The only exception to this convention is
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* <code>checkTopLevelWindow</code>, which returns a
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* <code>boolean</code> value.
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* <p>
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* The current security manager is set by the
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* <code>setSecurityManager</code> method in class
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* <code>System</code>. The current security manager is obtained
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* by the <code>getSecurityManager</code> method.
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* <p>
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* The special method
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* {@link SecurityManager#checkPermission(java.security.Permission)}
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* determines whether an access request indicated by a specified
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* permission should be granted or denied. The
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* default implementation calls
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*
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* <pre>
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* AccessController.checkPermission(perm);
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* </pre>
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*
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* <p>
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* If a requested access is allowed,
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* <code>checkPermission</code> returns quietly. If denied, a
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* <code>SecurityException</code> is thrown.
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* <p>
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* As of Java 2 SDK v1.2, the default implementation of each of the other
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* <code>check</code> methods in <code>SecurityManager</code> is to
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* call the <code>SecurityManager checkPermission</code> method
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* to determine if the calling thread has permission to perform the requested
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* operation.
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* <p>
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* Note that the <code>checkPermission</code> method with
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* just a single permission argument always performs security checks
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* within the context of the currently executing thread.
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* Sometimes a security check that should be made within a given context
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* will actually need to be done from within a
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* <i>different</i> context (for example, from within a worker thread).
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* The {@link SecurityManager#getSecurityContext getSecurityContext} method
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* and the {@link SecurityManager#checkPermission(java.security.Permission,
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* java.lang.Object) checkPermission}
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* method that includes a context argument are provided
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* for this situation. The
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* <code>getSecurityContext</code> method returns a "snapshot"
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* of the current calling context. (The default implementation
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* returns an AccessControlContext object.) A sample call is
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* the following:
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*
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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) context = sm.getSecurityContext();
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* </pre>
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*
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* <p>
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* The <code>checkPermission</code> method
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* that takes a context object in addition to a permission
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* makes access decisions based on that context,
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* rather than on that of the current execution thread.
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* Code within a different context can thus call that method,
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* passing the permission and the
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* previously-saved context object. A sample call, using the
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* SecurityManager <code>sm</code> obtained as in the previous example,
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* is the following:
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*
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* <pre>
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* if (sm != null) 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,
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* Security, Runtime, Property, AWT, Reflect, and Serializable.
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* The classes managing these various
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* permission categories are <code>java.io.FilePermission</code>,
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* <code>java.net.SocketPermission</code>,
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* <code>java.net.NetPermission</code>,
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* <code>java.security.SecurityPermission</code>,
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* <code>java.lang.RuntimePermission</code>,
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* <code>java.util.PropertyPermission</code>,
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* <code>java.awt.AWTPermission</code>,
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* <code>java.lang.reflect.ReflectPermission</code>, and
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* <code>java.io.SerializablePermission</code>.
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*
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* <p>All but the first two (FilePermission and SocketPermission) are
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* subclasses of <code>java.security.BasicPermission</code>, which itself
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* is an abstract subclass of the
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* top-level class for permissions, which is
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* <code>java.security.Permission</code>. BasicPermission defines the
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* functionality needed for all permissions that contain a name
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* that follows the hierarchical property naming convention
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* (for example, "exitVM", "setFactory", "queuePrintJob", etc).
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* An asterisk
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* may appear at the end of the name, following a ".", or by itself, to
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* signify a wildcard match. For example: "a.*" or "*" is valid,
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* "*a" or "a*b" is not valid.
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*
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* <p>FilePermission and SocketPermission are subclasses of the
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* top-level class for permissions
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* (<code>java.security.Permission</code>). Classes like these
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* that have a more complicated name syntax than that used by
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* BasicPermission subclass directly from Permission rather than from
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* BasicPermission. For example,
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* for a <code>java.io.FilePermission</code> object, the permission name is
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* the path name of a file (or directory).
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*
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* <p>Some of the permission classes have an "actions" list that tells
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* the actions that are permitted for the object. For example,
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* for a <code>java.io.FilePermission</code> object, the actions list
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* (such as "read, write") specifies which actions are granted for the
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* specified file (or for files in the specified directory).
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*
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* <p>Other permission classes are for "named" permissions -
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* ones that contain a name but no actions list; you either have the
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* named permission or you don't.
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*
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* <p>Note: There is also a <code>java.security.AllPermission</code>
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* permission that implies all permissions. It exists to simplify the work
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* of system administrators who might need to perform multiple
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* tasks that require all (or numerous) permissions.
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* <p>
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* See <a href ="../../../technotes/guides/security/permissions.html">
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* Permissions in the JDK</a> for permission-related information.
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* This document includes, for example, a table listing the various SecurityManager
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* <code>check</code> methods and the permission(s) the default
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* implementation of each such method requires.
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* It also contains a table of all the version 1.2 methods
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* that require permissions, and for each such method tells
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* which permission it requires.
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* <p>
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* For more information about <code>SecurityManager</code> changes made in
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* the JDK and advice regarding porting of 1.1-style security managers,
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* see the <a href="../../../technotes/guides/security/index.html">security documentation</a>.
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*
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* @author Arthur van Hoff
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* @author Roland Schemers
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*
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* @see java.lang.ClassLoader
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* @see java.lang.SecurityException
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* @see java.lang.SecurityManager#checkTopLevelWindow(java.lang.Object)
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* checkTopLevelWindow
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* @see java.lang.System#getSecurityManager() getSecurityManager
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* @see java.lang.System#setSecurityManager(java.lang.SecurityManager)
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* setSecurityManager
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* @see java.security.AccessController AccessController
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* @see java.security.AccessControlContext AccessControlContext
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* @see java.security.AccessControlException AccessControlException
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* @see java.security.Permission
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* @see java.security.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 java.lang.RuntimePermission
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* @see java.awt.AWTPermission
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* @see java.security.Policy Policy
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* @see java.security.SecurityPermission SecurityPermission
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* @see java.security.ProtectionDomain
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*
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* @since JDK1.0
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*/
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public
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class SecurityManager {
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/**
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* This field is <code>true</code> if there is a security check in
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* progress; <code>false</code> otherwise.
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*
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* @deprecated This type of security checking is not recommended.
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* It is recommended that the <code>checkPermission</code>
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* call be used instead.
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*/
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@Deprecated
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protected boolean inCheck;
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/*
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* Have we been initialized. Effective against finalizer attacks.
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*/
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private boolean initialized = false;
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/**
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* returns true if the current context has been granted AllPermission
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*/
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private boolean hasAllPermission()
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{
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try {
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checkPermission(SecurityConstants.ALL_PERMISSION);
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return true;
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} catch (SecurityException se) {
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return false;
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}
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}
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/**
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* Tests if there is a security check in progress.
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*
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* @return the value of the <code>inCheck</code> field. This field
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* should contain <code>true</code> if a security check is
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* in progress,
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* <code>false</code> otherwise.
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* @see java.lang.SecurityManager#inCheck
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* @deprecated This type of security checking is not recommended.
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* It is recommended that the <code>checkPermission</code>
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* call be used instead.
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*/
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@Deprecated
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public boolean getInCheck() {
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return inCheck;
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}
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/**
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* Constructs a new <code>SecurityManager</code>.
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*
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* <p> If there is a security manager already installed, this method first
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* calls the security manager's <code>checkPermission</code> method
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* with the <code>RuntimePermission("createSecurityManager")</code>
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* permission to ensure the calling thread has permission to create a new
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* security manager.
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* This may result in throwing a <code>SecurityException</code>.
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*
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* @exception java.lang.SecurityException if a security manager already
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* exists and its <code>checkPermission</code> method
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* doesn't allow creation of a new security manager.
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* @see java.lang.System#getSecurityManager()
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* @see #checkPermission(java.security.Permission) checkPermission
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* @see java.lang.RuntimePermission
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*/
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public SecurityManager() {
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synchronized(SecurityManager.class) {
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SecurityManager sm = System.getSecurityManager();
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if (sm != null) {
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// ask the currently installed security manager if we
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// can create a new one.
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sm.checkPermission(new RuntimePermission
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("createSecurityManager"));
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}
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initialized = true;
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}
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}
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/**
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* Returns the current execution stack as an array of classes.
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* <p>
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* The length of the array is the number of methods on the execution
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* stack. The element at index <code>0</code> is the class of the
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* currently executing method, the element at index <code>1</code> is
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* the class of that method's caller, and so on.
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*
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* @return the execution stack.
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*/
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protected native Class[] getClassContext();
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/**
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* Returns the class loader of the most recently executing method from
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* a class defined using a non-system class loader. A non-system
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* class loader is defined as being a class loader that is not equal to
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* the system class loader (as returned
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* by {@link ClassLoader#getSystemClassLoader}) or one of its ancestors.
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* <p>
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* This method will return
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* <code>null</code> in the following three cases:
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* <ol>
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* <li>All methods on the execution stack are from classes
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* defined using the system class loader or one of its ancestors.
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*
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* <li>All methods on the execution stack up to the first
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* "privileged" caller
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* (see {@link java.security.AccessController#doPrivileged})
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* are from classes
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* defined using the system class loader or one of its ancestors.
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*
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* <li> A call to <code>checkPermission</code> with
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* <code>java.security.AllPermission</code> does not
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* result in a SecurityException.
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*
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* </ol>
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*
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* @return the class loader of the most recent occurrence on the stack
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* of a method from a class defined using a non-system class
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* loader.
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*
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* @deprecated This type of security checking is not recommended.
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* It is recommended that the <code>checkPermission</code>
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* call be used instead.
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*
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* @see java.lang.ClassLoader#getSystemClassLoader() getSystemClassLoader
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* @see #checkPermission(java.security.Permission) checkPermission
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*/
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@Deprecated
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protected ClassLoader currentClassLoader()
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{
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ClassLoader cl = currentClassLoader0();
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if ((cl != null) && hasAllPermission())
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cl = null;
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return cl;
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}
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private native ClassLoader currentClassLoader0();
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/**
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* Returns the class of the most recently executing method from
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* a class defined using a non-system class loader. A non-system
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* class loader is defined as being a class loader that is not equal to
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* the system class loader (as returned
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* by {@link ClassLoader#getSystemClassLoader}) or one of its ancestors.
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* <p>
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* This method will return
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* <code>null</code> in the following three cases:
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* <ol>
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* <li>All methods on the execution stack are from classes
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* defined using the system class loader or one of its ancestors.
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*
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* <li>All methods on the execution stack up to the first
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* "privileged" caller
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* (see {@link java.security.AccessController#doPrivileged})
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* are from classes
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* defined using the system class loader or one of its ancestors.
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*
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* <li> A call to <code>checkPermission</code> with
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* <code>java.security.AllPermission</code> does not
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* result in a SecurityException.
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*
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* </ol>
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*
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* @return the class of the most recent occurrence on the stack
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* of a method from a class defined using a non-system class
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* loader.
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*
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* @deprecated This type of security checking is not recommended.
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* It is recommended that the <code>checkPermission</code>
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* call be used instead.
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*
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* @see java.lang.ClassLoader#getSystemClassLoader() getSystemClassLoader
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* @see #checkPermission(java.security.Permission) checkPermission
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*/
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@Deprecated
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protected Class<?> currentLoadedClass() {
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Class<?> c = currentLoadedClass0();
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if ((c != null) && hasAllPermission())
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c = null;
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return c;
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}
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/**
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* Returns the stack depth of the specified class.
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*
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* @param name the fully qualified name of the class to search for.
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* @return the depth on the stack frame of the first occurrence of a
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* method from a class with the specified name;
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* <code>-1</code> if such a frame cannot be found.
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* @deprecated This type of security checking is not recommended.
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* It is recommended that the <code>checkPermission</code>
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* call be used instead.
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*
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*/
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@Deprecated
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protected native int classDepth(String name);
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/**
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* Returns the stack depth of the most recently executing method
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* from a class defined using a non-system class loader. A non-system
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* class loader is defined as being a class loader that is not equal to
|
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* the system class loader (as returned
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* by {@link ClassLoader#getSystemClassLoader}) or one of its ancestors.
|
|
* <p>
|
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* This method will return
|
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* -1 in the following three cases:
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* <ol>
|
|
* <li>All methods on the execution stack are from classes
|
|
* defined using the system class loader or one of its ancestors.
|
|
*
|
|
* <li>All methods on the execution stack up to the first
|
|
* "privileged" caller
|
|
* (see {@link java.security.AccessController#doPrivileged})
|
|
* are from classes
|
|
* defined using the system class loader or one of its ancestors.
|
|
*
|
|
* <li> A call to <code>checkPermission</code> with
|
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* <code>java.security.AllPermission</code> does not
|
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* result in a SecurityException.
|
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*
|
|
* </ol>
|
|
*
|
|
* @return the depth on the stack frame of the most recent occurrence of
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* a method from a class defined using a non-system class loader.
|
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*
|
|
* @deprecated This type of security checking is not recommended.
|
|
* It is recommended that the <code>checkPermission</code>
|
|
* call be used instead.
|
|
*
|
|
* @see java.lang.ClassLoader#getSystemClassLoader() getSystemClassLoader
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* @see #checkPermission(java.security.Permission) checkPermission
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*/
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@Deprecated
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|
protected int classLoaderDepth()
|
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{
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int depth = classLoaderDepth0();
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if (depth != -1) {
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if (hasAllPermission())
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depth = -1;
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else
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depth--; // make sure we don't include ourself
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}
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return depth;
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}
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|
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private native int classLoaderDepth0();
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|
|
/**
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* Tests if a method from a class with the specified
|
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* name is on the execution stack.
|
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*
|
|
* @param name the fully qualified name of the class.
|
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* @return <code>true</code> if a method from a class with the specified
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* name is on the execution stack; <code>false</code> otherwise.
|
|
* @deprecated This type of security checking is not recommended.
|
|
* It is recommended that the <code>checkPermission</code>
|
|
* call be used instead.
|
|
*/
|
|
@Deprecated
|
|
protected boolean inClass(String name) {
|
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return classDepth(name) >= 0;
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}
|
|
|
|
/**
|
|
* Basically, tests if a method from a class defined using a
|
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* class loader is on the execution stack.
|
|
*
|
|
* @return <code>true</code> if a call to <code>currentClassLoader</code>
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|
* has a non-null return value.
|
|
*
|
|
* @deprecated This type of security checking is not recommended.
|
|
* It is recommended that the <code>checkPermission</code>
|
|
* call be used instead.
|
|
* @see #currentClassLoader() currentClassLoader
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|
*/
|
|
@Deprecated
|
|
protected boolean inClassLoader() {
|
|
return currentClassLoader() != null;
|
|
}
|
|
|
|
/**
|
|
* Creates an object that encapsulates the current execution
|
|
* environment. The result of this method is used, for example, by the
|
|
* three-argument <code>checkConnect</code> method and by the
|
|
* two-argument <code>checkRead</code> method.
|
|
* These methods are needed because a trusted method may be called
|
|
* on to read a file or open a socket on behalf of another method.
|
|
* The trusted method needs to determine if the other (possibly
|
|
* untrusted) method would be allowed to perform the operation on its
|
|
* own.
|
|
* <p> The default implementation of this method is to return
|
|
* an <code>AccessControlContext</code> object.
|
|
*
|
|
* @return an implementation-dependent object that encapsulates
|
|
* sufficient information about the current execution environment
|
|
* to perform some security checks later.
|
|
* @see java.lang.SecurityManager#checkConnect(java.lang.String, int,
|
|
* java.lang.Object) checkConnect
|
|
* @see java.lang.SecurityManager#checkRead(java.lang.String,
|
|
* java.lang.Object) checkRead
|
|
* @see java.security.AccessControlContext AccessControlContext
|
|
*/
|
|
public Object getSecurityContext() {
|
|
return AccessController.getContext();
|
|
}
|
|
|
|
/**
|
|
* Throws a <code>SecurityException</code> if the requested
|
|
* access, specified by the given permission, is not permitted based
|
|
* on the security policy currently in effect.
|
|
* <p>
|
|
* This method calls <code>AccessController.checkPermission</code>
|
|
* with the given permission.
|
|
*
|
|
* @param perm the requested permission.
|
|
* @exception SecurityException if access is not permitted based on
|
|
* the current security policy.
|
|
* @exception NullPointerException if the permission argument is
|
|
* <code>null</code>.
|
|
* @since 1.2
|
|
*/
|
|
public void checkPermission(Permission perm) {
|
|
java.security.AccessController.checkPermission(perm);
|
|
}
|
|
|
|
/**
|
|
* Throws a <code>SecurityException</code> if the
|
|
* specified security context is denied access to the resource
|
|
* specified by the given permission.
|
|
* The context must be a security
|
|
* context returned by a previous call to
|
|
* <code>getSecurityContext</code> and the access control
|
|
* decision is based upon the configured security policy for
|
|
* that security context.
|
|
* <p>
|
|
* If <code>context</code> is an instance of
|
|
* <code>AccessControlContext</code> then the
|
|
* <code>AccessControlContext.checkPermission</code> method is
|
|
* invoked with the specified permission.
|
|
* <p>
|
|
* If <code>context</code> is not an instance of
|
|
* <code>AccessControlContext</code> then a
|
|
* <code>SecurityException</code> is thrown.
|
|
*
|
|
* @param perm the specified permission
|
|
* @param context a system-dependent security context.
|
|
* @exception SecurityException if the specified security context
|
|
* is not an instance of <code>AccessControlContext</code>
|
|
* (e.g., is <code>null</code>), or is denied access to the
|
|
* resource specified by the given permission.
|
|
* @exception NullPointerException if the permission argument is
|
|
* <code>null</code>.
|
|
* @see java.lang.SecurityManager#getSecurityContext()
|
|
* @see java.security.AccessControlContext#checkPermission(java.security.Permission)
|
|
* @since 1.2
|
|
*/
|
|
public void checkPermission(Permission perm, Object context) {
|
|
if (context instanceof AccessControlContext) {
|
|
((AccessControlContext)context).checkPermission(perm);
|
|
} else {
|
|
throw new SecurityException();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Throws a <code>SecurityException</code> if the
|
|
* calling thread is not allowed to create a new class loader.
|
|
* <p>
|
|
* This method calls <code>checkPermission</code> with the
|
|
* <code>RuntimePermission("createClassLoader")</code>
|
|
* permission.
|
|
* <p>
|
|
* If you override this method, then you should make a call to
|
|
* <code>super.checkCreateClassLoader</code>
|
|
* at the point the overridden method would normally throw an
|
|
* exception.
|
|
*
|
|
* @exception SecurityException if the calling thread does not
|
|
* have permission
|
|
* to create a new class loader.
|
|
* @see java.lang.ClassLoader#ClassLoader()
|
|
* @see #checkPermission(java.security.Permission) checkPermission
|
|
*/
|
|
public void checkCreateClassLoader() {
|
|
checkPermission(SecurityConstants.CREATE_CLASSLOADER_PERMISSION);
|
|
}
|
|
|
|
/**
|
|
* reference to the root thread group, used for the checkAccess
|
|
* methods.
|
|
*/
|
|
|
|
private static ThreadGroup rootGroup = getRootGroup();
|
|
|
|
private static ThreadGroup getRootGroup() {
|
|
ThreadGroup root = Thread.currentThread().getThreadGroup();
|
|
while (root.getParent() != null) {
|
|
root = root.getParent();
|
|
}
|
|
return root;
|
|
}
|
|
|
|
/**
|
|
* Throws a <code>SecurityException</code> if the
|
|
* calling thread is not allowed to modify the thread argument.
|
|
* <p>
|
|
* This method is invoked for the current security manager by the
|
|
* <code>stop</code>, <code>suspend</code>, <code>resume</code>,
|
|
* <code>setPriority</code>, <code>setName</code>, and
|
|
* <code>setDaemon</code> methods of class <code>Thread</code>.
|
|
* <p>
|
|
* If the thread argument is a system thread (belongs to
|
|
* the thread group with a <code>null</code> parent) then
|
|
* this method calls <code>checkPermission</code> with the
|
|
* <code>RuntimePermission("modifyThread")</code> permission.
|
|
* If the thread argument is <i>not</i> a system thread,
|
|
* this method just returns silently.
|
|
* <p>
|
|
* Applications that want a stricter policy should override this
|
|
* method. If this method is overridden, the method that overrides
|
|
* it should additionally check to see if the calling thread has the
|
|
* <code>RuntimePermission("modifyThread")</code> permission, and
|
|
* if so, return silently. This is to ensure that code granted
|
|
* that permission (such as the JDK itself) is allowed to
|
|
* manipulate any thread.
|
|
* <p>
|
|
* If this method is overridden, then
|
|
* <code>super.checkAccess</code> should
|
|
* be called by the first statement in the overridden method, or the
|
|
* equivalent security check should be placed in the overridden method.
|
|
*
|
|
* @param t the thread to be checked.
|
|
* @exception SecurityException if the calling thread does not have
|
|
* permission to modify the thread.
|
|
* @exception NullPointerException if the thread argument is
|
|
* <code>null</code>.
|
|
* @see java.lang.Thread#resume() resume
|
|
* @see java.lang.Thread#setDaemon(boolean) setDaemon
|
|
* @see java.lang.Thread#setName(java.lang.String) setName
|
|
* @see java.lang.Thread#setPriority(int) setPriority
|
|
* @see java.lang.Thread#stop() stop
|
|
* @see java.lang.Thread#suspend() suspend
|
|
* @see #checkPermission(java.security.Permission) checkPermission
|
|
*/
|
|
public void checkAccess(Thread t) {
|
|
if (t == null) {
|
|
throw new NullPointerException("thread can't be null");
|
|
}
|
|
if (t.getThreadGroup() == rootGroup) {
|
|
checkPermission(SecurityConstants.MODIFY_THREAD_PERMISSION);
|
|
} else {
|
|
// just return
|
|
}
|
|
}
|
|
/**
|
|
* Throws a <code>SecurityException</code> if the
|
|
* calling thread is not allowed to modify the thread group argument.
|
|
* <p>
|
|
* This method is invoked for the current security manager when a
|
|
* new child thread or child thread group is created, and by the
|
|
* <code>setDaemon</code>, <code>setMaxPriority</code>,
|
|
* <code>stop</code>, <code>suspend</code>, <code>resume</code>, and
|
|
* <code>destroy</code> methods of class <code>ThreadGroup</code>.
|
|
* <p>
|
|
* If the thread group argument is the system thread group (
|
|
* has a <code>null</code> parent) then
|
|
* this method calls <code>checkPermission</code> with the
|
|
* <code>RuntimePermission("modifyThreadGroup")</code> permission.
|
|
* If the thread group argument is <i>not</i> the system thread group,
|
|
* this method just returns silently.
|
|
* <p>
|
|
* Applications that want a stricter policy should override this
|
|
* method. If this method is overridden, the method that overrides
|
|
* it should additionally check to see if the calling thread has the
|
|
* <code>RuntimePermission("modifyThreadGroup")</code> permission, and
|
|
* if so, return silently. This is to ensure that code granted
|
|
* that permission (such as the JDK itself) is allowed to
|
|
* manipulate any thread.
|
|
* <p>
|
|
* If this method is overridden, then
|
|
* <code>super.checkAccess</code> should
|
|
* be called by the first statement in the overridden method, or the
|
|
* equivalent security check should be placed in the overridden method.
|
|
*
|
|
* @param g the thread group to be checked.
|
|
* @exception SecurityException if the calling thread does not have
|
|
* permission to modify the thread group.
|
|
* @exception NullPointerException if the thread group argument is
|
|
* <code>null</code>.
|
|
* @see java.lang.ThreadGroup#destroy() destroy
|
|
* @see java.lang.ThreadGroup#resume() resume
|
|
* @see java.lang.ThreadGroup#setDaemon(boolean) setDaemon
|
|
* @see java.lang.ThreadGroup#setMaxPriority(int) setMaxPriority
|
|
* @see java.lang.ThreadGroup#stop() stop
|
|
* @see java.lang.ThreadGroup#suspend() suspend
|
|
* @see #checkPermission(java.security.Permission) checkPermission
|
|
*/
|
|
public void checkAccess(ThreadGroup g) {
|
|
if (g == null) {
|
|
throw new NullPointerException("thread group can't be null");
|
|
}
|
|
if (g == rootGroup) {
|
|
checkPermission(SecurityConstants.MODIFY_THREADGROUP_PERMISSION);
|
|
} else {
|
|
// just return
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Throws a <code>SecurityException</code> if the
|
|
* calling thread is not allowed to cause the Java Virtual Machine to
|
|
* halt with the specified status code.
|
|
* <p>
|
|
* This method is invoked for the current security manager by the
|
|
* <code>exit</code> method of class <code>Runtime</code>. A status
|
|
* of <code>0</code> indicates success; other values indicate various
|
|
* errors.
|
|
* <p>
|
|
* This method calls <code>checkPermission</code> with the
|
|
* <code>RuntimePermission("exitVM."+status)</code> permission.
|
|
* <p>
|
|
* If you override this method, then you should make a call to
|
|
* <code>super.checkExit</code>
|
|
* at the point the overridden method would normally throw an
|
|
* exception.
|
|
*
|
|
* @param status the exit status.
|
|
* @exception SecurityException if the calling thread does not have
|
|
* permission to halt the Java Virtual Machine with
|
|
* the specified status.
|
|
* @see java.lang.Runtime#exit(int) exit
|
|
* @see #checkPermission(java.security.Permission) checkPermission
|
|
*/
|
|
public void checkExit(int status) {
|
|
checkPermission(new RuntimePermission("exitVM."+status));
|
|
}
|
|
|
|
/**
|
|
* Throws a <code>SecurityException</code> if the
|
|
* calling thread is not allowed to create a subprocess.
|
|
* <p>
|
|
* This method is invoked for the current security manager by the
|
|
* <code>exec</code> methods of class <code>Runtime</code>.
|
|
* <p>
|
|
* This method calls <code>checkPermission</code> with the
|
|
* <code>FilePermission(cmd,"execute")</code> permission
|
|
* if cmd is an absolute path, otherwise it calls
|
|
* <code>checkPermission</code> with
|
|
* <code>FilePermission("<<ALL FILES>>","execute")</code>.
|
|
* <p>
|
|
* If you override this method, then you should make a call to
|
|
* <code>super.checkExec</code>
|
|
* at the point the overridden method would normally throw an
|
|
* exception.
|
|
*
|
|
* @param cmd the specified system command.
|
|
* @exception SecurityException if the calling thread does not have
|
|
* permission to create a subprocess.
|
|
* @exception NullPointerException if the <code>cmd</code> argument is
|
|
* <code>null</code>.
|
|
* @see java.lang.Runtime#exec(java.lang.String)
|
|
* @see java.lang.Runtime#exec(java.lang.String, java.lang.String[])
|
|
* @see java.lang.Runtime#exec(java.lang.String[])
|
|
* @see java.lang.Runtime#exec(java.lang.String[], java.lang.String[])
|
|
* @see #checkPermission(java.security.Permission) checkPermission
|
|
*/
|
|
public void checkExec(String cmd) {
|
|
File f = new File(cmd);
|
|
if (f.isAbsolute()) {
|
|
checkPermission(new FilePermission(cmd,
|
|
SecurityConstants.FILE_EXECUTE_ACTION));
|
|
} else {
|
|
checkPermission(new FilePermission("<<ALL FILES>>",
|
|
SecurityConstants.FILE_EXECUTE_ACTION));
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Throws a <code>SecurityException</code> if the
|
|
* calling thread is not allowed to dynamic link the library code
|
|
* specified by the string argument file. The argument is either a
|
|
* simple library name or a complete filename.
|
|
* <p>
|
|
* This method is invoked for the current security manager by
|
|
* methods <code>load</code> and <code>loadLibrary</code> of class
|
|
* <code>Runtime</code>.
|
|
* <p>
|
|
* This method calls <code>checkPermission</code> with the
|
|
* <code>RuntimePermission("loadLibrary."+lib)</code> permission.
|
|
* <p>
|
|
* If you override this method, then you should make a call to
|
|
* <code>super.checkLink</code>
|
|
* at the point the overridden method would normally throw an
|
|
* exception.
|
|
*
|
|
* @param lib the name of the library.
|
|
* @exception SecurityException if the calling thread does not have
|
|
* permission to dynamically link the library.
|
|
* @exception NullPointerException if the <code>lib</code> argument is
|
|
* <code>null</code>.
|
|
* @see java.lang.Runtime#load(java.lang.String)
|
|
* @see java.lang.Runtime#loadLibrary(java.lang.String)
|
|
* @see #checkPermission(java.security.Permission) checkPermission
|
|
*/
|
|
public void checkLink(String lib) {
|
|
if (lib == null) {
|
|
throw new NullPointerException("library can't be null");
|
|
}
|
|
checkPermission(new RuntimePermission("loadLibrary."+lib));
|
|
}
|
|
|
|
/**
|
|
* Throws a <code>SecurityException</code> if the
|
|
* calling thread is not allowed to read from the specified file
|
|
* descriptor.
|
|
* <p>
|
|
* This method calls <code>checkPermission</code> with the
|
|
* <code>RuntimePermission("readFileDescriptor")</code>
|
|
* permission.
|
|
* <p>
|
|
* If you override this method, then you should make a call to
|
|
* <code>super.checkRead</code>
|
|
* at the point the overridden method would normally throw an
|
|
* exception.
|
|
*
|
|
* @param fd the system-dependent file descriptor.
|
|
* @exception SecurityException if the calling thread does not have
|
|
* permission to access the specified file descriptor.
|
|
* @exception NullPointerException if the file descriptor argument is
|
|
* <code>null</code>.
|
|
* @see java.io.FileDescriptor
|
|
* @see #checkPermission(java.security.Permission) checkPermission
|
|
*/
|
|
public void checkRead(FileDescriptor fd) {
|
|
if (fd == null) {
|
|
throw new NullPointerException("file descriptor can't be null");
|
|
}
|
|
checkPermission(new RuntimePermission("readFileDescriptor"));
|
|
}
|
|
|
|
/**
|
|
* Throws a <code>SecurityException</code> if the
|
|
* calling thread is not allowed to read the file specified by the
|
|
* string argument.
|
|
* <p>
|
|
* This method calls <code>checkPermission</code> with the
|
|
* <code>FilePermission(file,"read")</code> permission.
|
|
* <p>
|
|
* If you override this method, then you should make a call to
|
|
* <code>super.checkRead</code>
|
|
* at the point the overridden method would normally throw an
|
|
* exception.
|
|
*
|
|
* @param file the system-dependent file name.
|
|
* @exception SecurityException if the calling thread does not have
|
|
* permission to access the specified file.
|
|
* @exception NullPointerException if the <code>file</code> argument is
|
|
* <code>null</code>.
|
|
* @see #checkPermission(java.security.Permission) checkPermission
|
|
*/
|
|
public void checkRead(String file) {
|
|
checkPermission(new FilePermission(file,
|
|
SecurityConstants.FILE_READ_ACTION));
|
|
}
|
|
|
|
/**
|
|
* Throws a <code>SecurityException</code> if the
|
|
* specified security context is not allowed to read the file
|
|
* specified by the string argument. The context must be a security
|
|
* context returned by a previous call to
|
|
* <code>getSecurityContext</code>.
|
|
* <p> If <code>context</code> is an instance of
|
|
* <code>AccessControlContext</code> then the
|
|
* <code>AccessControlContext.checkPermission</code> method will
|
|
* be invoked with the <code>FilePermission(file,"read")</code> permission.
|
|
* <p> If <code>context</code> is not an instance of
|
|
* <code>AccessControlContext</code> then a
|
|
* <code>SecurityException</code> is thrown.
|
|
* <p>
|
|
* If you override this method, then you should make a call to
|
|
* <code>super.checkRead</code>
|
|
* at the point the overridden method would normally throw an
|
|
* exception.
|
|
*
|
|
* @param file the system-dependent filename.
|
|
* @param context a system-dependent security context.
|
|
* @exception SecurityException if the specified security context
|
|
* is not an instance of <code>AccessControlContext</code>
|
|
* (e.g., is <code>null</code>), or does not have permission
|
|
* to read the specified file.
|
|
* @exception NullPointerException if the <code>file</code> argument is
|
|
* <code>null</code>.
|
|
* @see java.lang.SecurityManager#getSecurityContext()
|
|
* @see java.security.AccessControlContext#checkPermission(java.security.Permission)
|
|
*/
|
|
public void checkRead(String file, Object context) {
|
|
checkPermission(
|
|
new FilePermission(file, SecurityConstants.FILE_READ_ACTION),
|
|
context);
|
|
}
|
|
|
|
/**
|
|
* Throws a <code>SecurityException</code> if the
|
|
* calling thread is not allowed to write to the specified file
|
|
* descriptor.
|
|
* <p>
|
|
* This method calls <code>checkPermission</code> with the
|
|
* <code>RuntimePermission("writeFileDescriptor")</code>
|
|
* permission.
|
|
* <p>
|
|
* If you override this method, then you should make a call to
|
|
* <code>super.checkWrite</code>
|
|
* at the point the overridden method would normally throw an
|
|
* exception.
|
|
*
|
|
* @param fd the system-dependent file descriptor.
|
|
* @exception SecurityException if the calling thread does not have
|
|
* permission to access the specified file descriptor.
|
|
* @exception NullPointerException if the file descriptor argument is
|
|
* <code>null</code>.
|
|
* @see java.io.FileDescriptor
|
|
* @see #checkPermission(java.security.Permission) checkPermission
|
|
*/
|
|
public void checkWrite(FileDescriptor fd) {
|
|
if (fd == null) {
|
|
throw new NullPointerException("file descriptor can't be null");
|
|
}
|
|
checkPermission(new RuntimePermission("writeFileDescriptor"));
|
|
|
|
}
|
|
|
|
/**
|
|
* Throws a <code>SecurityException</code> if the
|
|
* calling thread is not allowed to write to the file specified by
|
|
* the string argument.
|
|
* <p>
|
|
* This method calls <code>checkPermission</code> with the
|
|
* <code>FilePermission(file,"write")</code> permission.
|
|
* <p>
|
|
* If you override this method, then you should make a call to
|
|
* <code>super.checkWrite</code>
|
|
* at the point the overridden method would normally throw an
|
|
* exception.
|
|
*
|
|
* @param file the system-dependent filename.
|
|
* @exception SecurityException if the calling thread does not
|
|
* have permission to access the specified file.
|
|
* @exception NullPointerException if the <code>file</code> argument is
|
|
* <code>null</code>.
|
|
* @see #checkPermission(java.security.Permission) checkPermission
|
|
*/
|
|
public void checkWrite(String file) {
|
|
checkPermission(new FilePermission(file,
|
|
SecurityConstants.FILE_WRITE_ACTION));
|
|
}
|
|
|
|
/**
|
|
* Throws a <code>SecurityException</code> if the
|
|
* calling thread is not allowed to delete the specified file.
|
|
* <p>
|
|
* This method is invoked for the current security manager by the
|
|
* <code>delete</code> method of class <code>File</code>.
|
|
* <p>
|
|
* This method calls <code>checkPermission</code> with the
|
|
* <code>FilePermission(file,"delete")</code> permission.
|
|
* <p>
|
|
* If you override this method, then you should make a call to
|
|
* <code>super.checkDelete</code>
|
|
* at the point the overridden method would normally throw an
|
|
* exception.
|
|
*
|
|
* @param file the system-dependent filename.
|
|
* @exception SecurityException if the calling thread does not
|
|
* have permission to delete the file.
|
|
* @exception NullPointerException if the <code>file</code> argument is
|
|
* <code>null</code>.
|
|
* @see java.io.File#delete()
|
|
* @see #checkPermission(java.security.Permission) checkPermission
|
|
*/
|
|
public void checkDelete(String file) {
|
|
checkPermission(new FilePermission(file,
|
|
SecurityConstants.FILE_DELETE_ACTION));
|
|
}
|
|
|
|
/**
|
|
* Throws a <code>SecurityException</code> if the
|
|
* calling thread is not allowed to open a socket connection to the
|
|
* specified host and port number.
|
|
* <p>
|
|
* A port number of <code>-1</code> indicates that the calling
|
|
* method is attempting to determine the IP address of the specified
|
|
* host name.
|
|
* <p>
|
|
* This method calls <code>checkPermission</code> with the
|
|
* <code>SocketPermission(host+":"+port,"connect")</code> permission if
|
|
* the port is not equal to -1. If the port is equal to -1, then
|
|
* it calls <code>checkPermission</code> with the
|
|
* <code>SocketPermission(host,"resolve")</code> permission.
|
|
* <p>
|
|
* If you override this method, then you should make a call to
|
|
* <code>super.checkConnect</code>
|
|
* at the point the overridden method would normally throw an
|
|
* exception.
|
|
*
|
|
* @param host the host name port to connect to.
|
|
* @param port the protocol port to connect to.
|
|
* @exception SecurityException if the calling thread does not have
|
|
* permission to open a socket connection to the specified
|
|
* <code>host</code> and <code>port</code>.
|
|
* @exception NullPointerException if the <code>host</code> argument is
|
|
* <code>null</code>.
|
|
* @see #checkPermission(java.security.Permission) checkPermission
|
|
*/
|
|
public void checkConnect(String host, int port) {
|
|
if (host == null) {
|
|
throw new NullPointerException("host can't be null");
|
|
}
|
|
if (!host.startsWith("[") && host.indexOf(':') != -1) {
|
|
host = "[" + host + "]";
|
|
}
|
|
if (port == -1) {
|
|
checkPermission(new SocketPermission(host,
|
|
SecurityConstants.SOCKET_RESOLVE_ACTION));
|
|
} else {
|
|
checkPermission(new SocketPermission(host+":"+port,
|
|
SecurityConstants.SOCKET_CONNECT_ACTION));
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Throws a <code>SecurityException</code> if the
|
|
* specified security context is not allowed to open a socket
|
|
* connection to the specified host and port number.
|
|
* <p>
|
|
* A port number of <code>-1</code> indicates that the calling
|
|
* method is attempting to determine the IP address of the specified
|
|
* host name.
|
|
* <p> If <code>context</code> is not an instance of
|
|
* <code>AccessControlContext</code> then a
|
|
* <code>SecurityException</code> is thrown.
|
|
* <p>
|
|
* Otherwise, the port number is checked. If it is not equal
|
|
* to -1, the <code>context</code>'s <code>checkPermission</code>
|
|
* method is called with a
|
|
* <code>SocketPermission(host+":"+port,"connect")</code> permission.
|
|
* If the port is equal to -1, then
|
|
* the <code>context</code>'s <code>checkPermission</code> method
|
|
* is called with a
|
|
* <code>SocketPermission(host,"resolve")</code> permission.
|
|
* <p>
|
|
* If you override this method, then you should make a call to
|
|
* <code>super.checkConnect</code>
|
|
* at the point the overridden method would normally throw an
|
|
* exception.
|
|
*
|
|
* @param host the host name port to connect to.
|
|
* @param port the protocol port to connect to.
|
|
* @param context a system-dependent security context.
|
|
* @exception SecurityException if the specified security context
|
|
* is not an instance of <code>AccessControlContext</code>
|
|
* (e.g., is <code>null</code>), or does not have permission
|
|
* to open a socket connection to the specified
|
|
* <code>host</code> and <code>port</code>.
|
|
* @exception NullPointerException if the <code>host</code> argument is
|
|
* <code>null</code>.
|
|
* @see java.lang.SecurityManager#getSecurityContext()
|
|
* @see java.security.AccessControlContext#checkPermission(java.security.Permission)
|
|
*/
|
|
public void checkConnect(String host, int port, Object context) {
|
|
if (host == null) {
|
|
throw new NullPointerException("host can't be null");
|
|
}
|
|
if (!host.startsWith("[") && host.indexOf(':') != -1) {
|
|
host = "[" + host + "]";
|
|
}
|
|
if (port == -1)
|
|
checkPermission(new SocketPermission(host,
|
|
SecurityConstants.SOCKET_RESOLVE_ACTION),
|
|
context);
|
|
else
|
|
checkPermission(new SocketPermission(host+":"+port,
|
|
SecurityConstants.SOCKET_CONNECT_ACTION),
|
|
context);
|
|
}
|
|
|
|
/**
|
|
* Throws a <code>SecurityException</code> if the
|
|
* calling thread is not allowed to wait for a connection request on
|
|
* the specified local port number.
|
|
* <p>
|
|
* This method calls <code>checkPermission</code> with the
|
|
* <code>SocketPermission("localhost:"+port,"listen")</code>.
|
|
* <p>
|
|
* If you override this method, then you should make a call to
|
|
* <code>super.checkListen</code>
|
|
* at the point the overridden method would normally throw an
|
|
* exception.
|
|
*
|
|
* @param port the local port.
|
|
* @exception SecurityException if the calling thread does not have
|
|
* permission to listen on the specified port.
|
|
* @see #checkPermission(java.security.Permission) checkPermission
|
|
*/
|
|
public void checkListen(int port) {
|
|
checkPermission(new SocketPermission("localhost:"+port,
|
|
SecurityConstants.SOCKET_LISTEN_ACTION));
|
|
}
|
|
|
|
/**
|
|
* Throws a <code>SecurityException</code> if the
|
|
* calling thread is not permitted to accept a socket connection from
|
|
* the specified host and port number.
|
|
* <p>
|
|
* This method is invoked for the current security manager by the
|
|
* <code>accept</code> method of class <code>ServerSocket</code>.
|
|
* <p>
|
|
* This method calls <code>checkPermission</code> with the
|
|
* <code>SocketPermission(host+":"+port,"accept")</code> permission.
|
|
* <p>
|
|
* If you override this method, then you should make a call to
|
|
* <code>super.checkAccept</code>
|
|
* at the point the overridden method would normally throw an
|
|
* exception.
|
|
*
|
|
* @param host the host name of the socket connection.
|
|
* @param port the port number of the socket connection.
|
|
* @exception SecurityException if the calling thread does not have
|
|
* permission to accept the connection.
|
|
* @exception NullPointerException if the <code>host</code> argument is
|
|
* <code>null</code>.
|
|
* @see java.net.ServerSocket#accept()
|
|
* @see #checkPermission(java.security.Permission) checkPermission
|
|
*/
|
|
public void checkAccept(String host, int port) {
|
|
if (host == null) {
|
|
throw new NullPointerException("host can't be null");
|
|
}
|
|
if (!host.startsWith("[") && host.indexOf(':') != -1) {
|
|
host = "[" + host + "]";
|
|
}
|
|
checkPermission(new SocketPermission(host+":"+port,
|
|
SecurityConstants.SOCKET_ACCEPT_ACTION));
|
|
}
|
|
|
|
/**
|
|
* Throws a <code>SecurityException</code> if the
|
|
* calling thread is not allowed to use
|
|
* (join/leave/send/receive) IP multicast.
|
|
* <p>
|
|
* This method calls <code>checkPermission</code> with the
|
|
* <code>java.net.SocketPermission(maddr.getHostAddress(),
|
|
* "accept,connect")</code> permission.
|
|
* <p>
|
|
* If you override this method, then you should make a call to
|
|
* <code>super.checkMulticast</code>
|
|
* at the point the overridden method would normally throw an
|
|
* exception.
|
|
*
|
|
* @param maddr Internet group address to be used.
|
|
* @exception SecurityException if the calling thread is not allowed to
|
|
* use (join/leave/send/receive) IP multicast.
|
|
* @exception NullPointerException if the address argument is
|
|
* <code>null</code>.
|
|
* @since JDK1.1
|
|
* @see #checkPermission(java.security.Permission) checkPermission
|
|
*/
|
|
public void checkMulticast(InetAddress maddr) {
|
|
String host = maddr.getHostAddress();
|
|
if (!host.startsWith("[") && host.indexOf(':') != -1) {
|
|
host = "[" + host + "]";
|
|
}
|
|
checkPermission(new SocketPermission(host,
|
|
SecurityConstants.SOCKET_CONNECT_ACCEPT_ACTION));
|
|
}
|
|
|
|
/**
|
|
* Throws a <code>SecurityException</code> if the
|
|
* calling thread is not allowed to use
|
|
* (join/leave/send/receive) IP multicast.
|
|
* <p>
|
|
* This method calls <code>checkPermission</code> with the
|
|
* <code>java.net.SocketPermission(maddr.getHostAddress(),
|
|
* "accept,connect")</code> permission.
|
|
* <p>
|
|
* If you override this method, then you should make a call to
|
|
* <code>super.checkMulticast</code>
|
|
* at the point the overridden method would normally throw an
|
|
* exception.
|
|
*
|
|
* @param maddr Internet group address to be used.
|
|
* @param ttl value in use, if it is multicast send.
|
|
* Note: this particular implementation does not use the ttl
|
|
* parameter.
|
|
* @exception SecurityException if the calling thread is not allowed to
|
|
* use (join/leave/send/receive) IP multicast.
|
|
* @exception NullPointerException if the address argument is
|
|
* <code>null</code>.
|
|
* @since JDK1.1
|
|
* @deprecated Use #checkPermission(java.security.Permission) instead
|
|
* @see #checkPermission(java.security.Permission) checkPermission
|
|
*/
|
|
@Deprecated
|
|
public void checkMulticast(InetAddress maddr, byte ttl) {
|
|
String host = maddr.getHostAddress();
|
|
if (!host.startsWith("[") && host.indexOf(':') != -1) {
|
|
host = "[" + host + "]";
|
|
}
|
|
checkPermission(new SocketPermission(host,
|
|
SecurityConstants.SOCKET_CONNECT_ACCEPT_ACTION));
|
|
}
|
|
|
|
/**
|
|
* Throws a <code>SecurityException</code> if the
|
|
* calling thread is not allowed to access or modify the system
|
|
* properties.
|
|
* <p>
|
|
* This method is used by the <code>getProperties</code> and
|
|
* <code>setProperties</code> methods of class <code>System</code>.
|
|
* <p>
|
|
* This method calls <code>checkPermission</code> with the
|
|
* <code>PropertyPermission("*", "read,write")</code> permission.
|
|
* <p>
|
|
* If you override this method, then you should make a call to
|
|
* <code>super.checkPropertiesAccess</code>
|
|
* at the point the overridden method would normally throw an
|
|
* exception.
|
|
* <p>
|
|
*
|
|
* @exception SecurityException if the calling thread does not have
|
|
* permission to access or modify the system properties.
|
|
* @see java.lang.System#getProperties()
|
|
* @see java.lang.System#setProperties(java.util.Properties)
|
|
* @see #checkPermission(java.security.Permission) checkPermission
|
|
*/
|
|
public void checkPropertiesAccess() {
|
|
checkPermission(new PropertyPermission("*",
|
|
SecurityConstants.PROPERTY_RW_ACTION));
|
|
}
|
|
|
|
/**
|
|
* Throws a <code>SecurityException</code> if the
|
|
* calling thread is not allowed to access the system property with
|
|
* the specified <code>key</code> name.
|
|
* <p>
|
|
* This method is used by the <code>getProperty</code> method of
|
|
* class <code>System</code>.
|
|
* <p>
|
|
* This method calls <code>checkPermission</code> with the
|
|
* <code>PropertyPermission(key, "read")</code> permission.
|
|
* <p>
|
|
* If you override this method, then you should make a call to
|
|
* <code>super.checkPropertyAccess</code>
|
|
* at the point the overridden method would normally throw an
|
|
* exception.
|
|
*
|
|
* @param key a system property key.
|
|
*
|
|
* @exception SecurityException if the calling thread does not have
|
|
* permission to access the specified system property.
|
|
* @exception NullPointerException if the <code>key</code> argument is
|
|
* <code>null</code>.
|
|
* @exception IllegalArgumentException if <code>key</code> is empty.
|
|
*
|
|
* @see java.lang.System#getProperty(java.lang.String)
|
|
* @see #checkPermission(java.security.Permission) checkPermission
|
|
*/
|
|
public void checkPropertyAccess(String key) {
|
|
checkPermission(new PropertyPermission(key,
|
|
SecurityConstants.PROPERTY_READ_ACTION));
|
|
}
|
|
|
|
/**
|
|
* Returns <code>false</code> if the calling
|
|
* thread is not trusted to bring up the top-level window indicated
|
|
* by the <code>window</code> argument. In this case, the caller can
|
|
* still decide to show the window, but the window should include
|
|
* some sort of visual warning. If the method returns
|
|
* <code>true</code>, then the window can be shown without any
|
|
* special restrictions.
|
|
* <p>
|
|
* See class <code>Window</code> for more information on trusted and
|
|
* untrusted windows.
|
|
* <p>
|
|
* This method calls
|
|
* <code>checkPermission</code> with the
|
|
* <code>AWTPermission("showWindowWithoutWarningBanner")</code> permission,
|
|
* and returns <code>true</code> if a SecurityException is not thrown,
|
|
* otherwise it returns <code>false</code>.
|
|
* In the case of subset Profiles of Java SE that do not include the
|
|
* {@code java.awt} package, {@code checkPermission} is instead called
|
|
* to check the permission {@code java.security.AllPermission}.
|
|
* <p>
|
|
* If you override this method, then you should make a call to
|
|
* <code>super.checkTopLevelWindow</code>
|
|
* at the point the overridden method would normally return
|
|
* <code>false</code>, and the value of
|
|
* <code>super.checkTopLevelWindow</code> should
|
|
* be returned.
|
|
*
|
|
* @param window the new window that is being created.
|
|
* @return <code>true</code> if the calling thread is trusted to put up
|
|
* top-level windows; <code>false</code> otherwise.
|
|
* @exception NullPointerException if the <code>window</code> argument is
|
|
* <code>null</code>.
|
|
* @deprecated The dependency on {@code AWTPermission} creates an
|
|
* impediment to future modularization of the Java platform.
|
|
* Users of this method should instead invoke
|
|
* {@link #checkPermission} directly.
|
|
* This method will be changed in a future release to check
|
|
* the permission {@code java.security.AllPermission}.
|
|
* @see java.awt.Window
|
|
* @see #checkPermission(java.security.Permission) checkPermission
|
|
*/
|
|
@Deprecated
|
|
public boolean checkTopLevelWindow(Object window) {
|
|
if (window == null) {
|
|
throw new NullPointerException("window can't be null");
|
|
}
|
|
Permission perm = SecurityConstants.AWT.TOPLEVEL_WINDOW_PERMISSION;
|
|
if (perm == null) {
|
|
perm = SecurityConstants.ALL_PERMISSION;
|
|
}
|
|
try {
|
|
checkPermission(perm);
|
|
return true;
|
|
} catch (SecurityException se) {
|
|
// just return false
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Throws a <code>SecurityException</code> if the
|
|
* calling thread is not allowed to initiate a print job request.
|
|
* <p>
|
|
* This method calls
|
|
* <code>checkPermission</code> with the
|
|
* <code>RuntimePermission("queuePrintJob")</code> permission.
|
|
* <p>
|
|
* If you override this method, then you should make a call to
|
|
* <code>super.checkPrintJobAccess</code>
|
|
* at the point the overridden method would normally throw an
|
|
* exception.
|
|
* <p>
|
|
*
|
|
* @exception SecurityException if the calling thread does not have
|
|
* permission to initiate a print job request.
|
|
* @since JDK1.1
|
|
* @see #checkPermission(java.security.Permission) checkPermission
|
|
*/
|
|
public void checkPrintJobAccess() {
|
|
checkPermission(new RuntimePermission("queuePrintJob"));
|
|
}
|
|
|
|
/**
|
|
* Throws a <code>SecurityException</code> if the
|
|
* calling thread is not allowed to access the system clipboard.
|
|
* <p>
|
|
* This method calls <code>checkPermission</code> with the
|
|
* <code>AWTPermission("accessClipboard")</code>
|
|
* permission.
|
|
* In the case of subset Profiles of Java SE that do not include the
|
|
* {@code java.awt} package, {@code checkPermission} is instead called
|
|
* to check the permission {@code java.security.AllPermission}.
|
|
* <p>
|
|
* If you override this method, then you should make a call to
|
|
* <code>super.checkSystemClipboardAccess</code>
|
|
* at the point the overridden method would normally throw an
|
|
* exception.
|
|
*
|
|
* @since JDK1.1
|
|
* @exception SecurityException if the calling thread does not have
|
|
* permission to access the system clipboard.
|
|
* @deprecated The dependency on {@code AWTPermission} creates an
|
|
* impediment to future modularization of the Java platform.
|
|
* Users of this method should instead invoke
|
|
* {@link #checkPermission} directly.
|
|
* This method will be changed in a future release to check
|
|
* the permission {@code java.security.AllPermission}.
|
|
* @see #checkPermission(java.security.Permission) checkPermission
|
|
*/
|
|
@Deprecated
|
|
public void checkSystemClipboardAccess() {
|
|
Permission perm = SecurityConstants.AWT.ACCESS_CLIPBOARD_PERMISSION;
|
|
if (perm == null) {
|
|
perm = SecurityConstants.ALL_PERMISSION;
|
|
}
|
|
checkPermission(perm);
|
|
}
|
|
|
|
/**
|
|
* Throws a <code>SecurityException</code> if the
|
|
* calling thread is not allowed to access the AWT event queue.
|
|
* <p>
|
|
* This method calls <code>checkPermission</code> with the
|
|
* <code>AWTPermission("accessEventQueue")</code> permission.
|
|
* In the case of subset Profiles of Java SE that do not include the
|
|
* {@code java.awt} package, {@code checkPermission} is instead called
|
|
* to check the permission {@code java.security.AllPermission}.
|
|
*
|
|
* <p>
|
|
* If you override this method, then you should make a call to
|
|
* <code>super.checkAwtEventQueueAccess</code>
|
|
* at the point the overridden method would normally throw an
|
|
* exception.
|
|
*
|
|
* @since JDK1.1
|
|
* @exception SecurityException if the calling thread does not have
|
|
* permission to access the AWT event queue.
|
|
* @deprecated The dependency on {@code AWTPermission} creates an
|
|
* impediment to future modularization of the Java platform.
|
|
* Users of this method should instead invoke
|
|
* {@link #checkPermission} directly.
|
|
* This method will be changed in a future release to check
|
|
* the permission {@code java.security.AllPermission}.
|
|
* @see #checkPermission(java.security.Permission) checkPermission
|
|
*/
|
|
@Deprecated
|
|
public void checkAwtEventQueueAccess() {
|
|
Permission perm = SecurityConstants.AWT.CHECK_AWT_EVENTQUEUE_PERMISSION;
|
|
if (perm == null) {
|
|
perm = SecurityConstants.ALL_PERMISSION;
|
|
}
|
|
checkPermission(perm);
|
|
}
|
|
|
|
/*
|
|
* We have an initial invalid bit (initially false) for the class
|
|
* variables which tell if the cache is valid. If the underlying
|
|
* java.security.Security property changes via setProperty(), the
|
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* Security class uses reflection to change the variable and thus
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* invalidate the cache.
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*
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* Locking is handled by synchronization to the
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* packageAccessLock/packageDefinitionLock objects. They are only
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* used in this class.
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*
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* Note that cache invalidation as a result of the property change
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* happens without using these locks, so there may be a delay between
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* when a thread updates the property and when other threads updates
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* the cache.
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*/
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private static boolean packageAccessValid = false;
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private static String[] packageAccess;
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private static final Object packageAccessLock = new Object();
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private static boolean packageDefinitionValid = false;
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private static String[] packageDefinition;
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private static final Object packageDefinitionLock = new Object();
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private static String[] getPackages(String p) {
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String packages[] = null;
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if (p != null && !p.equals("")) {
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java.util.StringTokenizer tok =
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new java.util.StringTokenizer(p, ",");
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int n = tok.countTokens();
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if (n > 0) {
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packages = new String[n];
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int i = 0;
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while (tok.hasMoreElements()) {
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String s = tok.nextToken().trim();
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packages[i++] = s;
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}
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}
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}
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if (packages == null)
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packages = new String[0];
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return packages;
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}
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/**
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* Throws a <code>SecurityException</code> if the
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* calling thread is not allowed to access the package specified by
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* the argument.
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* <p>
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* This method is used by the <code>loadClass</code> method of class
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* loaders.
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* <p>
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* This method first gets a list of
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* restricted packages by obtaining a comma-separated list from
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* a call to
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* <code>java.security.Security.getProperty("package.access")</code>,
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* and checks to see if <code>pkg</code> starts with or equals
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* any of the restricted packages. If it does, then
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* <code>checkPermission</code> gets called with the
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* <code>RuntimePermission("accessClassInPackage."+pkg)</code>
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* permission.
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* <p>
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* If this method is overridden, then
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* <code>super.checkPackageAccess</code> should be called
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* as the first line in the overridden method.
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*
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* @param pkg the package name.
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* @exception SecurityException if the calling thread does not have
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* permission to access the specified package.
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* @exception NullPointerException if the package name argument is
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* <code>null</code>.
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* @see java.lang.ClassLoader#loadClass(java.lang.String, boolean)
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* loadClass
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* @see java.security.Security#getProperty getProperty
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* @see #checkPermission(java.security.Permission) checkPermission
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*/
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public void checkPackageAccess(String pkg) {
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if (pkg == null) {
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throw new NullPointerException("package name can't be null");
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}
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String[] pkgs;
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synchronized (packageAccessLock) {
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/*
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* Do we need to update our property array?
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*/
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if (!packageAccessValid) {
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String tmpPropertyStr =
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AccessController.doPrivileged(
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new PrivilegedAction<String>() {
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public String run() {
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return java.security.Security.getProperty(
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"package.access");
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}
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}
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);
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packageAccess = getPackages(tmpPropertyStr);
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packageAccessValid = true;
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}
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// Using a snapshot of packageAccess -- don't care if static field
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// changes afterwards; array contents won't change.
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pkgs = packageAccess;
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}
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/*
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* Traverse the list of packages, check for any matches.
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*/
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for (int i = 0; i < pkgs.length; i++) {
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if (pkg.startsWith(pkgs[i]) || pkgs[i].equals(pkg + ".")) {
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checkPermission(
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new RuntimePermission("accessClassInPackage."+pkg));
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|
break; // No need to continue; only need to check this once
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|
}
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|
}
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|
}
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|
|
|
/**
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|
* Throws a <code>SecurityException</code> if the
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* calling thread is not allowed to define classes in the package
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|
* specified by the argument.
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* <p>
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|
* This method is used by the <code>loadClass</code> method of some
|
|
* class loaders.
|
|
* <p>
|
|
* This method first gets a list of restricted packages by
|
|
* obtaining a comma-separated list from a call to
|
|
* <code>java.security.Security.getProperty("package.definition")</code>,
|
|
* and checks to see if <code>pkg</code> starts with or equals
|
|
* any of the restricted packages. If it does, then
|
|
* <code>checkPermission</code> gets called with the
|
|
* <code>RuntimePermission("defineClassInPackage."+pkg)</code>
|
|
* permission.
|
|
* <p>
|
|
* If this method is overridden, then
|
|
* <code>super.checkPackageDefinition</code> should be called
|
|
* as the first line in the overridden method.
|
|
*
|
|
* @param pkg the package name.
|
|
* @exception SecurityException if the calling thread does not have
|
|
* permission to define classes in the specified package.
|
|
* @see java.lang.ClassLoader#loadClass(java.lang.String, boolean)
|
|
* @see java.security.Security#getProperty getProperty
|
|
* @see #checkPermission(java.security.Permission) checkPermission
|
|
*/
|
|
public void checkPackageDefinition(String pkg) {
|
|
if (pkg == null) {
|
|
throw new NullPointerException("package name can't be null");
|
|
}
|
|
|
|
String[] pkgs;
|
|
synchronized (packageDefinitionLock) {
|
|
/*
|
|
* Do we need to update our property array?
|
|
*/
|
|
if (!packageDefinitionValid) {
|
|
String tmpPropertyStr =
|
|
AccessController.doPrivileged(
|
|
new PrivilegedAction<String>() {
|
|
public String run() {
|
|
return java.security.Security.getProperty(
|
|
"package.definition");
|
|
}
|
|
}
|
|
);
|
|
packageDefinition = getPackages(tmpPropertyStr);
|
|
packageDefinitionValid = true;
|
|
}
|
|
// Using a snapshot of packageDefinition -- don't care if static
|
|
// field changes afterwards; array contents won't change.
|
|
pkgs = packageDefinition;
|
|
}
|
|
|
|
/*
|
|
* Traverse the list of packages, check for any matches.
|
|
*/
|
|
for (int i = 0; i < pkgs.length; i++) {
|
|
if (pkg.startsWith(pkgs[i]) || pkgs[i].equals(pkg + ".")) {
|
|
checkPermission(
|
|
new RuntimePermission("defineClassInPackage."+pkg));
|
|
break; // No need to continue; only need to check this once
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Throws a <code>SecurityException</code> if the
|
|
* calling thread is not allowed to set the socket factory used by
|
|
* <code>ServerSocket</code> or <code>Socket</code>, or the stream
|
|
* handler factory used by <code>URL</code>.
|
|
* <p>
|
|
* This method calls <code>checkPermission</code> with the
|
|
* <code>RuntimePermission("setFactory")</code> permission.
|
|
* <p>
|
|
* If you override this method, then you should make a call to
|
|
* <code>super.checkSetFactory</code>
|
|
* at the point the overridden method would normally throw an
|
|
* exception.
|
|
* <p>
|
|
*
|
|
* @exception SecurityException if the calling thread does not have
|
|
* permission to specify a socket factory or a stream
|
|
* handler factory.
|
|
*
|
|
* @see java.net.ServerSocket#setSocketFactory(java.net.SocketImplFactory) setSocketFactory
|
|
* @see java.net.Socket#setSocketImplFactory(java.net.SocketImplFactory) setSocketImplFactory
|
|
* @see java.net.URL#setURLStreamHandlerFactory(java.net.URLStreamHandlerFactory) setURLStreamHandlerFactory
|
|
* @see #checkPermission(java.security.Permission) checkPermission
|
|
*/
|
|
public void checkSetFactory() {
|
|
checkPermission(new RuntimePermission("setFactory"));
|
|
}
|
|
|
|
/**
|
|
* Throws a <code>SecurityException</code> if the
|
|
* calling thread is not allowed to access members.
|
|
* <p>
|
|
* The default policy is to allow access to PUBLIC members, as well
|
|
* as access to classes that have the same class loader as the caller.
|
|
* In all other cases, this method calls <code>checkPermission</code>
|
|
* with the <code>RuntimePermission("accessDeclaredMembers")
|
|
* </code> permission.
|
|
* <p>
|
|
* If this method is overridden, then a call to
|
|
* <code>super.checkMemberAccess</code> cannot be made,
|
|
* as the default implementation of <code>checkMemberAccess</code>
|
|
* relies on the code being checked being at a stack depth of
|
|
* 4.
|
|
*
|
|
* @param clazz the class that reflection is to be performed on.
|
|
*
|
|
* @param which type of access, PUBLIC or DECLARED.
|
|
*
|
|
* @exception SecurityException if the caller does not have
|
|
* permission to access members.
|
|
* @exception NullPointerException if the <code>clazz</code> argument is
|
|
* <code>null</code>.
|
|
*
|
|
* @deprecated This method relies on the caller being at a stack depth
|
|
* of 4 which is error-prone and cannot be enforced by the runtime.
|
|
* Users of this method should instead invoke {@link #checkPermission}
|
|
* directly. This method will be changed in a future release
|
|
* to check the permission {@code java.security.AllPermission}.
|
|
*
|
|
* @see java.lang.reflect.Member
|
|
* @since JDK1.1
|
|
* @see #checkPermission(java.security.Permission) checkPermission
|
|
*/
|
|
@Deprecated
|
|
@CallerSensitive
|
|
public void checkMemberAccess(Class<?> clazz, int which) {
|
|
if (clazz == null) {
|
|
throw new NullPointerException("class can't be null");
|
|
}
|
|
if (which != Member.PUBLIC) {
|
|
Class<?> stack[] = getClassContext();
|
|
/*
|
|
* stack depth of 4 should be the caller of one of the
|
|
* methods in java.lang.Class that invoke checkMember
|
|
* access. The stack should look like:
|
|
*
|
|
* someCaller [3]
|
|
* java.lang.Class.someReflectionAPI [2]
|
|
* java.lang.Class.checkMemberAccess [1]
|
|
* SecurityManager.checkMemberAccess [0]
|
|
*
|
|
*/
|
|
if ((stack.length<4) ||
|
|
(stack[3].getClassLoader() != clazz.getClassLoader())) {
|
|
checkPermission(SecurityConstants.CHECK_MEMBER_ACCESS_PERMISSION);
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Determines whether the permission with the specified permission target
|
|
* name should be granted or denied.
|
|
*
|
|
* <p> If the requested permission is allowed, this method returns
|
|
* quietly. If denied, a SecurityException is raised.
|
|
*
|
|
* <p> This method creates a <code>SecurityPermission</code> object for
|
|
* the given permission target name and calls <code>checkPermission</code>
|
|
* with it.
|
|
*
|
|
* <p> See the documentation for
|
|
* <code>{@link java.security.SecurityPermission}</code> for
|
|
* a list of possible permission target names.
|
|
*
|
|
* <p> If you override this method, then you should make a call to
|
|
* <code>super.checkSecurityAccess</code>
|
|
* at the point the overridden method would normally throw an
|
|
* exception.
|
|
*
|
|
* @param target the target name of the <code>SecurityPermission</code>.
|
|
*
|
|
* @exception SecurityException if the calling thread does not have
|
|
* permission for the requested access.
|
|
* @exception NullPointerException if <code>target</code> is null.
|
|
* @exception IllegalArgumentException if <code>target</code> is empty.
|
|
*
|
|
* @since JDK1.1
|
|
* @see #checkPermission(java.security.Permission) checkPermission
|
|
*/
|
|
public void checkSecurityAccess(String target) {
|
|
checkPermission(new SecurityPermission(target));
|
|
}
|
|
|
|
private native Class<?> currentLoadedClass0();
|
|
|
|
/**
|
|
* Returns the thread group into which to instantiate any new
|
|
* thread being created at the time this is being called.
|
|
* By default, it returns the thread group of the current
|
|
* thread. This should be overridden by a specific security
|
|
* manager to return the appropriate thread group.
|
|
*
|
|
* @return ThreadGroup that new threads are instantiated into
|
|
* @since JDK1.1
|
|
* @see java.lang.ThreadGroup
|
|
*/
|
|
public ThreadGroup getThreadGroup() {
|
|
return Thread.currentThread().getThreadGroup();
|
|
}
|
|
|
|
}
|