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	/*
	* Copyright (c) 2000, 2013, 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.security.auth.module;

	/**
	* <p> This class implementation retrieves and makes available NT
	* security information for the current user.
	*
	*/
	@jdk.Exported
	public class NTSystem {

	private native void getCurrent(boolean debug);
	private native long getImpersonationToken0();

	private String userName;
	private String domain;
	private String domainSID;
	private String userSID;
	private String groupIDs[];
	private String primaryGroupID;
	private long impersonationToken;

	/**
	* Instantiate an <code>NTSystem</code> and load
	* the native library to access the underlying system information.
	*/
	public NTSystem() {
	this(false);
	}

	/**
	* Instantiate an <code>NTSystem</code> and load
	* the native library to access the underlying system information.
	*/
	NTSystem(boolean debug) {
	loadNative();
	getCurrent(debug);
	}

	/**
	* Get the username for the current NT user.
	*
	* <p>
	*
	* @return the username for the current NT user.
	*/
	public String getName() {
	return userName;
	}

	/**
	* Get the domain for the current NT user.
	*
	* <p>
	*
	* @return the domain for the current NT user.
	*/
	public String getDomain() {
	return domain;
	}

	/**
	* Get a printable SID for the current NT user's domain.
	*
	* <p>
	*
	* @return a printable SID for the current NT user's domain.
	*/
	public String getDomainSID() {
	return domainSID;
	}

	/**
	* Get a printable SID for the current NT user.
	*
	* <p>
	*
	* @return a printable SID for the current NT user.
	*/
	public String getUserSID() {
	return userSID;
	}

	/**
	* Get a printable primary group SID for the current NT user.
	*
	* <p>
	*
	* @return the primary group SID for the current NT user.
	*/
	public String getPrimaryGroupID() {
	return primaryGroupID;
	}

	/**
	* Get the printable group SIDs for the current NT user.
	*
	* <p>
	*
	* @return the group SIDs for the current NT user.
	*/
	public String[] getGroupIDs() {
	return groupIDs == null ? null : groupIDs.clone();
	}

	/**
	* Get an impersonation token for the current NT user.
	*
	* <p>
	*
	* @return an impersonation token for the current NT user.
	*/
	public synchronized long getImpersonationToken() {
	if (impersonationToken == 0) {
	impersonationToken = getImpersonationToken0();
	}
	return impersonationToken;
	}


	private void loadNative() {
	System.loadLibrary("jaas_nt");
	}
	}

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