SecurityActions.java

/*
 * JBoss, Home of Professional Open Source.
 * Copyright 2008, Red Hat Middleware LLC, and individual contributors
 * as indicated by the @author tags. See the copyright.txt file in the
 * distribution for a full listing of individual contributors.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */
package org.picketlink.identity.federation.bindings.jboss.auth;

import java.security.AccessController;
import java.security.PrivilegedAction;
import java.security.PrivilegedActionException;
import java.security.PrivilegedExceptionAction;

import org.jboss.security.SecurityContext;
import org.jboss.security.SecurityContextAssociation;
import org.jboss.security.SecurityContextFactory;

/**
 * Privileged blocks
 *
 * @author <a href="mmoyses@redhat.com">Marcus Moyses</a>
 * @version $Revision: 1 $
 */
class SecurityActions {
    static SecurityContext getSecurityContext() {
        SecurityManager sm = System.getSecurityManager();
        
        if (sm != null) {
            return AccessController.doPrivileged(new PrivilegedAction<SecurityContext>() {
                public SecurityContext run() {
                    return SecurityContextAssociation.getSecurityContext();
                }
            });
        } else {
            return SecurityContextAssociation.getSecurityContext();
        }
    }

    static SecurityContext createSecurityContext() throws PrivilegedActionException {
        SecurityManager sm = System.getSecurityManager();
        
        if (sm != null) {
            return AccessController.doPrivileged(new PrivilegedExceptionAction<SecurityContext>() {
                public SecurityContext run() throws Exception {
                    return SecurityContextFactory.createSecurityContext("CLIENT");
                }
            });
        } else {
            try {
                return SecurityContextFactory.createSecurityContext("CLIENT");
            } catch (Exception e) {
                throw new RuntimeException(e);
            }
        }
    }

    /**
     * <p>Returns a system property value using the specified <code>key</code>. If not found the <code>defaultValue</code> will be returned.</p>
     *
     * @param key
     * @param defaultValue
     * @return
     */
    static String getSystemProperty(final String key) {
        SecurityManager sm = System.getSecurityManager();
        
        if (sm != null) {
            return AccessController.doPrivileged(new PrivilegedAction<String>() {
                public String run() {
                    return System.getProperty(key);
                }
            });
        } else {
            return System.getProperty(key);
        }
    }
}