KrbKdcRep.java

/*
 * 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
 * or visit www.oracle.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);
		}
    }


}