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diff --git a/infrastructure/rhino1_7R1/src/org/mozilla/javascript/SecurityUtilities.java b/infrastructure/rhino1_7R1/src/org/mozilla/javascript/SecurityUtilities.java
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+/* -*- 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 (String)AccessController.doPrivileged(
+            new PrivilegedAction()
+            {
+                public Object run()
+                {
+                    return System.getProperty(name);
+                }
+            });
+    }
+    
+    public static ProtectionDomain getProtectionDomain(final Class clazz)
+    {
+        return (ProtectionDomain)AccessController.doPrivileged(
+                new PrivilegedAction()
+                {
+                    public Object run()
+                    {
+                        return clazz.getProtectionDomain();
+                    }
+                });
+    }
+}