/*

 * 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 Introduce constrained Kerberos delegation

 * @compile -XDignore.symbol.file S4U2self.java

 */

import java.util.Arrays;

import java.util.HashMap;

import java.util.List;

import java.util.Map;

import org.ietf.jgss.Oid;

import sun.security.jgss.GSSUtil;

public class S4U2self {

    public static void main(String[] args) throws Exception {

        // Test case, different policy settings in KDC:

        //                   |     ALLOW_S4U2SELF on

        //                   |   USER    USER2    none

        // ALLOW_S4U2PORXY   |-------------------------

        // USER to BACKEND   |   0       1        2

        // USER2 to BACKEND  |   3

        // USER to SERVER    |   4

        //      none         |   5

        //

        // 0 should succeed, all other fail

        int test = 0;

        Oid mech;

        if (args[0].equals("spnego")) {

            mech = GSSUtil.GSS_SPNEGO_MECH_OID;

        } else if (args[0].contains("krb5")) {

            mech = GSSUtil.GSS_KRB5_MECH_OID;

            test = Integer.parseInt(args[1]);

        } else {

            throw new Exception("Unknown mech");

        }

        OneKDC kdc = new OneKDC(null);

        kdc.writeJAASConf();

        switch (test) {

            case 1:

                kdc.setOption(KDC.Option.ALLOW_S4U2SELF, Arrays.asList(

                        new String[]{OneKDC.USER2 + "@" + OneKDC.REALM}));

                break;

            case 2:

                // No S4U2self

                break;

            default:

                kdc.setOption(KDC.Option.ALLOW_S4U2SELF, Arrays.asList(

                        new String[]{OneKDC.USER + "@" + OneKDC.REALM}));

                break;

        }

        Map<String,List<String>> map = new HashMap<>();

        switch (test) {

            case 3:

                map.put(OneKDC.USER2 + "@" + OneKDC.REALM, Arrays.asList(

                        new String[]{OneKDC.BACKEND + "@" + OneKDC.REALM}));

                kdc.setOption(KDC.Option.ALLOW_S4U2PROXY, map);

                break;

            case 4:

                map.put(OneKDC.USER + "@" + OneKDC.REALM, Arrays.asList(

                        new String[]{OneKDC.SERVER + "@" + OneKDC.REALM}));

                kdc.setOption(KDC.Option.ALLOW_S4U2PROXY, map);

                break;

            case 5:

                // No S4U2proxy set

                break;

            default:

                map.put(OneKDC.USER + "@" + OneKDC.REALM, Arrays.asList(

                        new String[]{OneKDC.BACKEND + "@" + OneKDC.REALM}));

                kdc.setOption(KDC.Option.ALLOW_S4U2PROXY, map);

                break;

        }

        Context c, s;

        c = Context.fromJAAS("client");

        c = c.impersonate(OneKDC.USER2);

        c.status();

        c.startAsClient(OneKDC.BACKEND, mech);

        s = Context.fromJAAS("backend");

        s.startAsServer(mech);

        Context.handshake(c, s);

        Context.transmit("i say high --", c, s);

        Context.transmit("   you say low", s, c);

        c.status();

        s.status();

        String n1 = c.x().getSrcName().toString().split("@")[0];

        String n2 = s.x().getSrcName().toString().split("@")[0];

        if (!n1.equals(OneKDC.USER2) || !n2.equals(OneKDC.USER2)) {

            throw new Exception("Impersonate failed");

        }

        s.dispose();

        c.dispose();

    }

}