| /* |
| * Copyright (c) 2003, 2005, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package com.sun.jmx.remote.security; |
| |
| import java.security.AccessControlContext; |
| import java.security.AccessController; |
| import java.security.CodeSource; |
| import java.security.Permissions; |
| import java.security.ProtectionDomain; |
| import javax.security.auth.Subject; |
| import javax.security.auth.SubjectDomainCombiner; |
| |
| /** |
| * <p>This class represents an extension to the {@link SubjectDomainCombiner} |
| * and is used to add a new {@link ProtectionDomain}, comprised of a null |
| * codesource/signers and an empty permission set, to the access control |
| * context with which this combiner is combined.</p> |
| * |
| * <p>When the {@link #combine} method is called the {@link ProtectionDomain} |
| * is augmented with the permissions granted to the set of principals present |
| * in the supplied {@link Subject}.</p> |
| */ |
| public class JMXSubjectDomainCombiner extends SubjectDomainCombiner { |
| |
| public JMXSubjectDomainCombiner(Subject s) { |
| super(s); |
| } |
| |
| public ProtectionDomain[] combine(ProtectionDomain[] current, |
| ProtectionDomain[] assigned) { |
| // Add a new ProtectionDomain with the null codesource/signers, and |
| // the empty permission set, to the end of the array containing the |
| // 'current' protections domains, i.e. the ones that will be augmented |
| // with the permissions granted to the set of principals present in |
| // the supplied subject. |
| // |
| ProtectionDomain[] newCurrent; |
| if (current == null || current.length == 0) { |
| newCurrent = new ProtectionDomain[1]; |
| newCurrent[0] = pdNoPerms; |
| } else { |
| newCurrent = new ProtectionDomain[current.length + 1]; |
| for (int i = 0; i < current.length; i++) { |
| newCurrent[i] = current[i]; |
| } |
| newCurrent[current.length] = pdNoPerms; |
| } |
| return super.combine(newCurrent, assigned); |
| } |
| |
| /** |
| * A null CodeSource. |
| */ |
| private static final CodeSource nullCodeSource = |
| new CodeSource(null, (java.security.cert.Certificate[]) null); |
| |
| /** |
| * A ProtectionDomain with a null CodeSource and an empty permission set. |
| */ |
| private static final ProtectionDomain pdNoPerms = |
| new ProtectionDomain(nullCodeSource, new Permissions()); |
| |
| /** |
| * Get the current AccessControlContext combined with the supplied subject. |
| */ |
| public static AccessControlContext getContext(Subject subject) { |
| return new AccessControlContext(AccessController.getContext(), |
| new JMXSubjectDomainCombiner(subject)); |
| } |
| |
| /** |
| * Get the AccessControlContext of the domain combiner created with |
| * the supplied subject, i.e. an AccessControlContext with the domain |
| * combiner created with the supplied subject and where the caller's |
| * context has been removed. |
| */ |
| public static AccessControlContext |
| getDomainCombinerContext(Subject subject) { |
| return new AccessControlContext( |
| new AccessControlContext(new ProtectionDomain[0]), |
| new JMXSubjectDomainCombiner(subject)); |
| } |
| } |