019dac3214
2005-02-08 Andrew Haley <aph@redhat.com>
* javax/security/auth/Subject.java (doAsPrivileged): If acc is
null, create a new AccessControlContext.
* java/security/SecureClassLoader.java (protectionDomainCache):
new field.
(defineClass): Create a new protection domain and add it to our
cache.
* java/rmi/server/UnicastRemoteObject.java (exportObject): Call
addStub() to keep track of the stub we've exported.
(unexportObject): Call deleteStub().
* java/rmi/server/RemoteObject.java (stubs): New field.
(addStub): New method.
(deleteStub): New method.
(toStub): Rewrite.
* java/lang/VMCompiler.java (loadSharedLibrary): Pass
true to findHelper (tryParents).
* gnu/gcj/runtime/SharedLibLoader.java (SharedLibLoader):
Likewise.
* java/net/URLClassLoader.java (SoURLLoader): Likewise.
* gnu/gcj/runtime/SharedLibHelper.java (SharedLibHelper): Pass
ProtectionDomain.
If tryParents is false, don't scan parent class loaders.
* java/security/Permissions.java (PermissionsHash.implies):
Iterate over the collection and invoke implies() on each
element.
From-SVN: r95111
129 lines
4.3 KiB
Java
129 lines
4.3 KiB
Java
/* SecureClassLoader.java --- A Secure Class Loader
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Copyright (C) 1999, 2004 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package java.security;
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/**
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* A Secure Class Loader for loading classes with additional
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* support for specifying code source and permissions when
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* they are retrieved by the system policy handler.
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*
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* @since 1.2
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*
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* @author Mark Benvenuto
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*/
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public class SecureClassLoader extends ClassLoader
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{
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java.util.WeakHashMap protectionDomainCache = new java.util.WeakHashMap();
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protected SecureClassLoader(ClassLoader parent)
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{
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super(parent);
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SecurityManager sm = System.getSecurityManager();
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if(sm != null)
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sm.checkCreateClassLoader();
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}
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protected SecureClassLoader()
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{
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SecurityManager sm = System.getSecurityManager();
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if(sm != null)
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sm.checkCreateClassLoader();
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}
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/**
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* Creates a class using an array of bytes and a
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* CodeSource.
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*
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* @param name the name to give the class. null if unknown.
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* @param b the data representing the classfile, in classfile format.
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* @param off the offset into the data where the classfile starts.
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* @param len the length of the classfile data in the array.
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* @param cs the CodeSource for the class or null when unknown.
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*
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* @return the class that was defined and optional CodeSource.
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*
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* @exception ClassFormatError if the byte array is not in proper classfile format.
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*/
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protected final Class defineClass(String name, byte[] b, int off, int len,
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CodeSource cs)
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{
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if (cs != null)
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{
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ProtectionDomain protectionDomain;
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synchronized (protectionDomainCache)
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{
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protectionDomain = (ProtectionDomain)protectionDomainCache.get(cs);
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}
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if (protectionDomain == null)
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{
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protectionDomain
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= new ProtectionDomain(cs, getPermissions(cs), this, null);
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synchronized (protectionDomainCache)
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{
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ProtectionDomain domain
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= (ProtectionDomain)protectionDomainCache.get(cs);
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if (domain == null)
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protectionDomainCache.put(cs, protectionDomain);
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else
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protectionDomain = domain;
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}
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}
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return super.defineClass(name, b, off, len, protectionDomain);
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}
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else
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return super.defineClass(name, b, off, len);
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}
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/**
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* Returns a PermissionCollection for the specified CodeSource.
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* The default implementation invokes
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* java.security.Policy.getPermissions.
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*
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* This method is called by defineClass that takes a CodeSource
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* arguement to build a proper ProtectionDomain for the class
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* being defined.
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*/
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protected PermissionCollection getPermissions(CodeSource cs)
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{
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Policy policy = Policy.getCurrentPolicy();
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return policy.getPermissions(cs);
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}
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}
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