jdk8-mips64-public/jdk: src/share/classes/sun/security/krb5/KrbKdcRep.java@d8bd882cfd2a (annotated)

src/share/classes/sun/security/krb5/KrbKdcRep.java@d8bd882cfd2a (annotated)

src/share/classes/sun/security/krb5/KrbKdcRep.java

Sun, 31 May 2020 10:13:04 +0800

author: mbalao
date: Sun, 31 May 2020 10:13:04 +0800
changeset 14203: d8bd882cfd2a
parent 14114: 971263b8cd56
child 14222: 5a272e10d7e7
permissions: -rw-r--r--

8246193: Possible NPE in ENC-PA-REP search in AS-REQ
Reviewed-by: zgu, andrew

 /*
  * 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.*;
 import sun.security.krb5.internal.crypto.KeyUsage;
 import sun.security.util.DerInputStream;
 abstract class KrbKdcRep {
     static void check(
                       boolean isAsReq,
                       KDCReq req,
                       KDCRep rep,
                       EncryptionKey replyKey
                       ) throws KrbApErrException {
         // cname change in AS-REP is allowed only if the client
         // sent CANONICALIZE or an NT-ENTERPRISE cname in the request, and the
         // server supports RFC 6806 - Section 11 FAST scheme (ENC-PA-REP flag).
         if (isAsReq && !req.reqBody.cname.equals(rep.cname) &&
                 ((!req.reqBody.kdcOptions.get(KDCOptions.CANONICALIZE) &&
                 req.reqBody.cname.getNameType() !=
                 PrincipalName.KRB_NT_ENTERPRISE) ||
                 !rep.encKDCRepPart.flags.get(Krb5.TKT_OPTS_ENC_PA_REP))) {
             rep.encKDCRepPart.key.destroy();
             throw new KrbApErrException(Krb5.KRB_AP_ERR_MODIFIED);
         }
         // sname change in TGS-REP is allowed only if client
         // sent CANONICALIZE and new sname is a referral of
         // the form krbtgt/TO-REALM.COM@FROM-REALM.COM.
         if (!req.reqBody.sname.equals(rep.encKDCRepPart.sname)) {
             String[] snameStrings = rep.encKDCRepPart.sname.getNameStrings();
             if (isAsReq || !req.reqBody.kdcOptions.get(KDCOptions.CANONICALIZE) ||
                     snameStrings == null || snameStrings.length != 2 ||
                     !snameStrings[0].equals(PrincipalName.TGS_DEFAULT_SRV_NAME) ||
                     !rep.encKDCRepPart.sname.getRealmString().equals(
                             req.reqBody.sname.getRealmString())) {
                 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);
         }
         // We allow KDC to return a non-forwardable ticket if request has -f
         for (int i = 2; i < 6; i++) {
             if (req.reqBody.kdcOptions.get(i) !=
                    rep.encKDCRepPart.flags.get(i)) {
                 if (Krb5.DEBUG) {
                     System.out.println("> KrbKdcRep.check: at #" + i
                             + ". request for " + req.reqBody.kdcOptions.get(i)
                             + ", received " + rep.encKDCRepPart.flags.get(i));
                 }
                 throw new KrbApErrException(Krb5.KRB_AP_ERR_MODIFIED);
             }
         }
         // Reply to a renewable request should be renewable, but if request does
         // not contain renewable, KDC is free to issue a renewable ticket (for
         // example, if ticket_lifetime is too big).
         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);
         }
         // RFC 6806 - Section 11 mechanism check
         // The availability of the ENC-PA-REP flag in the KDC response is
         // mandatory on some cases (see Krb5.TKT_OPTS_ENC_PA_REP check above).
         if (rep.encKDCRepPart.flags.get(Krb5.TKT_OPTS_ENC_PA_REP)) {
             boolean reqPaReqEncPaRep = false;
             boolean repPaReqEncPaRepValid = false;
             if (req.pAData != null) {
                 for (PAData pa : req.pAData) {
                     if (pa.getType() == Krb5.PA_REQ_ENC_PA_REP) {
                         // The KDC supports RFC 6806 and ENC-PA-REP was sent in
                         // the request (AS-REQ). A valid checksum is now required.
                         reqPaReqEncPaRep = true;
                         break;
                     }
                 }
             }
             if (rep.encKDCRepPart.pAData != null) {
                 for (PAData pa : rep.encKDCRepPart.pAData) {
                     if (pa.getType() == Krb5.PA_REQ_ENC_PA_REP) {
                         try {
                             Checksum repCksum = new Checksum(
                                     new DerInputStream(
                                             pa.getValue()).getDerValue());
                             // The checksum is inside encKDCRepPart so we don't
                             // care if it's keyed or not.
                             repPaReqEncPaRepValid =
                                     repCksum.verifyAnyChecksum(
                                             req.asn1Encode(), replyKey,
                                             KeyUsage.KU_AS_REQ);
                         } catch (Exception e) {
                             if (Krb5.DEBUG) {
                                 e.printStackTrace();
                             }
                         }
                         break;
                     }
                 }
             }
             if (reqPaReqEncPaRep && !repPaReqEncPaRepValid) {
                 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);
                 }
             }
         }
     }
 }

Mercurial > jdk8-mips64-public > jdk / annotate

src/share/classes/sun/security/krb5/KrbKdcRep.java@d8bd882cfd2a (annotated)

src/share/classes/sun/security/krb5/KrbKdcRep.java