/*

 * 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.

 *

 * 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.

 */

/*

 * @test

 * @summary GSSAPI/SPNEGO does not work with server using MIT Kerberos library

 */

import sun.security.jgss.GSSUtil;

import sun.security.util.BitArray;

import sun.security.util.DerInputStream;

import sun.security.util.DerValue;

public class SpnegoReqFlags {

    public static void main(String[] args)

            throws Exception {

        // Create and start the KDC

        new OneKDC(null).writeJAASConf();

        new SpnegoReqFlags().go();

    }

    void go() throws Exception {

        Context c = Context.fromJAAS("client");

        c.startAsClient(OneKDC.SERVER, GSSUtil.GSS_SPNEGO_MECH_OID);

        byte[] token = c.doAs(new Action() {

            @Override

            public byte[] run(Context me, byte[] input) throws Exception {

                me.x().requestCredDeleg(true);

                me.x().requestReplayDet(false);

                me.x().requestSequenceDet(false);

                return me.x().initSecContext(new byte[0], 0, 0);

            }

        }, null);

        DerValue d = new DerValue(token);   // GSSToken

        DerInputStream ins = d.data;        // OID + mech token

        d.data.getDerValue();               // skip OID

        d = d.data.getDerValue();           // NegTokenInit

        d = d.data.getDerValue();           // The SEQUENCE inside

        boolean found = false;

        // Go through all fields inside NegTokenInit. The reqFlags field

        // is optional. It's even not recommended in RFC 4178.

        while (d.data.available() > 0) {

            DerValue d2 = d.data.getDerValue();

            if (d2.isContextSpecific((byte)1)) {

                found = true;

                System.out.println("regFlags field located.");

                BitArray ba = d2.data.getUnalignedBitString();

                if (ba.length() != 7) {

                    throw new Exception("reqFlags should contain 7 bits");

                }

                if (!ba.get(0)) {

                    throw new Exception("delegFlag should be true");

                }

                if (ba.get(2) || ba.get(3)) {

                    throw new Exception("replay/sequenceFlag should be false");

                }

            }

        }

        if (!found) {

            System.out.println("Warning: regFlags field not found, too new?");

        }

        c.dispose();

    }

}