/*

 * 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

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 * questions.

 */

package com.sun.security.auth.module;

/**

 * This class implementation retrieves and makes available NT

 * security information for the current user.

 *

 */

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} and load

     * the native library to access the underlying system information.

     */

    public NTSystem() {

        this(false);

    }

    /**

     * Instantiate an {@code NTSystem} 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.

     *

     * @return the username for the current NT user.

     */

    public String getName() {

        return userName;

    }

    /**

     * Get the domain for the current NT user.

     *

     * @return the domain for the current NT user.

     */

    public String getDomain() {

        return domain;

    }

    /**

     * Get a printable SID for the current NT user's domain.

     *

     * @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.

     *

     * @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.

     *

     * @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.

     *

     * @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.

     *

     * @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");

    }

}