/* -*- Mode: java; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Rhino code, released
* May 6, 1999.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1997-1999
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Norris Boyd
* Igor Bukanov
*
* Alternatively, the contents of this file may be used under the terms of
* the GNU General Public License Version 2 or later (the "GPL"), in which
* case the provisions of the GPL are applicable instead of those above. If
* you wish to allow use of your version of this file only under the terms of
* the GPL and not to allow others to use your version of this file under the
* MPL, indicate your decision by deleting the provisions above and replacing
* them with the notice and other provisions required by the GPL. If you do
* not delete the provisions above, a recipient may use your version of this
* file under either the MPL or the GPL.
*
* ***** END LICENSE BLOCK ***** */
package org.mozilla.javascript;
import java.security.AccessController;
import java.security.PrivilegedAction;
import java.security.ProtectionDomain;
/**
* @author Attila Szegedi
*/
public class SecurityUtilities
{
/**
* Retrieves a system property within a privileged block. Use it only when
* the property is used from within Rhino code and is not passed out of it.
* @param name the name of the system property
* @return the value of the system property
*/
public static String getSystemProperty(final String name)
{
return AccessController.doPrivileged(
new PrivilegedAction<String>()
{
public String run()
{
return System.getProperty(name);
}
});
}
public static ProtectionDomain getProtectionDomain(final Class<?> clazz)
{
return AccessController.doPrivileged(
new PrivilegedAction<ProtectionDomain>()
{
public ProtectionDomain run()
{
return clazz.getProtectionDomain();
}
});
}
/**
* Look up the top-most element in the current stack representing a
* script and return its protection domain. This relies on the system-wide
* SecurityManager being an instance of {@link RhinoSecurityManager},
* otherwise it returns <code>null</code>.
* @return The protection of the top-most script in the current stack, or null
*/
public static ProtectionDomain getScriptProtectionDomain() {
final SecurityManager securityManager = System.getSecurityManager();
if (securityManager instanceof RhinoSecurityManager) {
return AccessController.doPrivileged(
new PrivilegedAction<ProtectionDomain>() {
public ProtectionDomain run() {
Class c = ((RhinoSecurityManager) securityManager)
.getCurrentScriptClass();
return c == null ? null : c.getProtectionDomain();
}
}
);
}
return null;
}
}