/*

 * Copyright 2009 Sun Microsystems, Inc.  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.

 *

 * 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

 * CA 95054 USA or visit www.sun.com if you need additional information or

 * have any questions.

 */

import com.sun.security.jgss.ExtendedGSSContext;

import java.io.File;

import java.io.FileOutputStream;

import java.io.IOException;

import java.security.Security;

import javax.security.auth.callback.Callback;

import javax.security.auth.callback.CallbackHandler;

import javax.security.auth.callback.NameCallback;

import javax.security.auth.callback.PasswordCallback;

import javax.security.auth.callback.UnsupportedCallbackException;

import org.ietf.jgss.GSSContext;

import org.ietf.jgss.GSSCredential;

import org.ietf.jgss.GSSException;

import org.ietf.jgss.GSSManager;

import org.ietf.jgss.GSSName;

import sun.security.jgss.GSSUtil;

import sun.security.krb5.Config;

public class OkAsDelegateXRealm implements CallbackHandler {

    /**

     * @param args boolean if the program should succeed

     */

    public static void main(String[] args)

            throws Exception {

        // Create and start the KDCs. Here we have 3 realms: R1, R2 and R3.

        // R1 is trusted by R2, and R2 trusted by R3.

        KDC kdc1 = KDC.create("R1");

        kdc1.setPolicy("ok-as-delegate",

                System.getProperty("test.kdc.policy.ok-as-delegate"));

        kdc1.addPrincipal("dummy", "bogus".toCharArray());

        kdc1.addPrincipalRandKey("krbtgt/R1");

        kdc1.addPrincipal("krbtgt/R2@R1", "r1->r2".toCharArray());

        KDC kdc2 = KDC.create("R2");

        kdc2.setPolicy("ok-as-delegate",

                System.getProperty("test.kdc.policy.ok-as-delegate"));

        kdc2.addPrincipalRandKey("krbtgt/R2");

        kdc2.addPrincipal("krbtgt/R2@R1", "r1->r2".toCharArray());

        kdc2.addPrincipal("krbtgt/R3@R2", "r2->r3".toCharArray());

        KDC kdc3 = KDC.create("R3");

        kdc3.setPolicy("ok-as-delegate",

                System.getProperty("test.kdc.policy.ok-as-delegate"));

        kdc3.addPrincipalRandKey("krbtgt/R3");

        kdc3.addPrincipal("krbtgt/R3@R2", "r2->r3".toCharArray());

        kdc3.addPrincipalRandKey("host/host.r3.local");

        KDC.saveConfig("krb5-localkdc.conf", kdc1, kdc2, kdc3,

                "forwardable=true",

                "[capaths]",

                "R1 = {",

                "    R2 = .",

                "    R3 = R2",

                "}",

                "[domain_realm]",

                ".r3.local=R3"

                );

        System.setProperty("java.security.krb5.conf", "krb5-localkdc.conf");

        kdc3.writeKtab("localkdc.ktab");

        FileOutputStream fos = new FileOutputStream("jaas-localkdc.conf");

        // Defines the client and server on R1 and R3 respectively.

        fos.write(("com.sun.security.jgss.krb5.initiate {\n" +

                "    com.sun.security.auth.module.Krb5LoginModule\n" +

                "    required\n" +

                "    principal=dummy\n" +

                "    doNotPrompt=false\n" +

                "    useTicketCache=false\n" +

                "    ;\n};\n" +

                "com.sun.security.jgss.krb5.accept {\n" +

                "    com.sun.security.auth.module.Krb5LoginModule required\n" +

                "    principal=\"host/host.r3.local@R3\"\n" +

                "    useKeyTab=true\n" +

                "    keyTab=localkdc.ktab\n" +

                "    isInitiator=false\n" +

                "    storeKey=true;\n};\n" +

                "\n").getBytes());

        fos.close();

        Security.setProperty("auth.login.defaultCallbackHandler",

                "OkAsDelegateXRealm");

        System.setProperty("java.security.auth.login.config", "jaas-localkdc.conf");

        new File("krb5-localkdc.conf").deleteOnExit();

        new File("localkdc.ktab").deleteOnExit();

        new File("jaas-localkdc.conf").deleteOnExit();

        Config.refresh();

        Context c = Context.fromJAAS("com.sun.security.jgss.krb5.initiate");

        Context s = Context.fromJAAS("com.sun.security.jgss.krb5.accept");

        // Test twice. The frist time the whole cross realm process is tried,

        // the second time the cached service ticket is used. This is to make sure

        // the behaviors are the same, especailly for the case when one of the

        // cross-realm TGTs does not have OK-AS-DELEGATE on.

        for (int i=0; i<2; i++) {

            c.startAsClient("host@host.r3.local", GSSUtil.GSS_KRB5_MECH_OID);

            s.startAsServer(GSSUtil.GSS_KRB5_MECH_OID);

            c.x().requestDelegPolicy(true);

            Context.handshake(c, s);

            boolean succeed = true;

            try {

                s.x().getDelegCred();

            } catch (GSSException gsse) {

                succeed = false;

            }

            if (succeed != Boolean.parseBoolean(args[0])) {

                throw new Exception("Test fail at round #" + i);

            }

        }

    }

    @Override

    public void handle(Callback[] callbacks)

            throws IOException, UnsupportedCallbackException {

        for (Callback callback : callbacks) {

            if (callback instanceof NameCallback) {

                ((NameCallback) callback).setName("dummy");

            }

            if (callback instanceof PasswordCallback) {

                ((PasswordCallback) callback).setPassword("bogus".toCharArray());

            }

        }

    }

}