/*

 * 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.  Sun designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Sun 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 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.

 */

/*

 *

 *  (C) Copyright IBM Corp. 1999 All Rights Reserved.

 *  Copyright 1997 The Open Group Research Institute.  All rights reserved.

 */

package sun.security.krb5;

import sun.security.krb5.internal.*;

abstract class KrbKdcRep {

    static void check(

                      KDCReq req,

                      KDCRep rep

                      ) throws KrbApErrException {

        if (!req.reqBody.cname.equalsWithoutRealm(rep.cname)) {

            rep.encKDCRepPart.key.destroy();

            throw new KrbApErrException(Krb5.KRB_AP_ERR_MODIFIED);

        }

        /**** XXX

              if (!req.reqBody.crealm.equals(rep.crealm)) {

              rep.encKDCRepPart.key.destroy();

              throw new KrbApErrException(Krb5.KRB_AP_ERR_MODIFIED);

              }

        *****/

        if (!req.reqBody.sname.equalsWithoutRealm(rep.encKDCRepPart.sname)) {

            rep.encKDCRepPart.key.destroy();

            throw new KrbApErrException(Krb5.KRB_AP_ERR_MODIFIED);

        }

        if (!req.reqBody.crealm.equals(rep.encKDCRepPart.srealm)) {

            rep.encKDCRepPart.key.destroy();

            throw new KrbApErrException(Krb5.KRB_AP_ERR_MODIFIED);

        }

        if (req.reqBody.getNonce() != rep.encKDCRepPart.nonce) {

            rep.encKDCRepPart.key.destroy();

            throw new KrbApErrException(Krb5.KRB_AP_ERR_MODIFIED);

        }

        if (

            ((req.reqBody.addresses != null && rep.encKDCRepPart.caddr != null) &&

             !req.reqBody.addresses.equals(rep.encKDCRepPart.caddr))) {

            rep.encKDCRepPart.key.destroy();

            throw new KrbApErrException(Krb5.KRB_AP_ERR_MODIFIED);

        }

        for (int i = 1; i < 6; i++) {

            if (req.reqBody.kdcOptions.get(i) !=

                rep.encKDCRepPart.flags.get(i)) {

                throw new KrbApErrException(Krb5.KRB_AP_ERR_MODIFIED);

            }

        }

        // XXX Can renew a ticket but not ask for a renewable renewed ticket

        // See impl of Credentials.renew().

        if (req.reqBody.kdcOptions.get(KDCOptions.RENEWABLE) !=

            rep.encKDCRepPart.flags.get(KDCOptions.RENEWABLE)) {

            throw new KrbApErrException(Krb5.KRB_AP_ERR_MODIFIED);

        }

        if ((req.reqBody.from == null) || req.reqBody.from.isZero())

            // verify this is allowed

            if ((rep.encKDCRepPart.starttime != null) &&

                !rep.encKDCRepPart.starttime.inClockSkew()) {

                rep.encKDCRepPart.key.destroy();

                throw new KrbApErrException(Krb5.KRB_AP_ERR_SKEW);

            }

        if ((req.reqBody.from != null) && !req.reqBody.from.isZero())

            // verify this is allowed

            if ((rep.encKDCRepPart.starttime != null) &&

                !req.reqBody.from.equals(rep.encKDCRepPart.starttime)) {

                rep.encKDCRepPart.key.destroy();

                throw new KrbApErrException(Krb5.KRB_AP_ERR_MODIFIED);

            }

        if (!req.reqBody.till.isZero() &&

            rep.encKDCRepPart.endtime.greaterThan(req.reqBody.till)) {

            rep.encKDCRepPart.key.destroy();

            throw new KrbApErrException(Krb5.KRB_AP_ERR_MODIFIED);

        }

        if (req.reqBody.kdcOptions.get(KDCOptions.RENEWABLE))

            if (req.reqBody.rtime != null && !req.reqBody.rtime.isZero())

                                // verify this is required

                if ((rep.encKDCRepPart.renewTill == null) ||

                    rep.encKDCRepPart.renewTill.greaterThan(req.reqBody.rtime)

                    ) {

                    rep.encKDCRepPart.key.destroy();

                    throw new KrbApErrException(Krb5.KRB_AP_ERR_MODIFIED);

                }

        if (req.reqBody.kdcOptions.get(KDCOptions.RENEWABLE_OK) &&

            rep.encKDCRepPart.flags.get(KDCOptions.RENEWABLE))

            if (!req.reqBody.till.isZero())

                                // verify this is required

                if ((rep.encKDCRepPart.renewTill == null) ||

                    rep.encKDCRepPart.renewTill.greaterThan(req.reqBody.till)

                    ) {

                    rep.encKDCRepPart.key.destroy();

                    throw new KrbApErrException(Krb5.KRB_AP_ERR_MODIFIED);

                }

    }

}