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/*
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Sun designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Sun in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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* CA 95054 USA or visit www.sun.com if you need additional information or
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* have any questions.
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*/
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/*
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*
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* (C) Copyright IBM Corp. 1999 All Rights Reserved.
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* Copyright 1997 The Open Group Research Institute. All rights reserved.
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*/
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package sun.security.krb5.internal;
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import sun.security.krb5.*;
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import sun.security.util.*;
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import java.util.Vector;
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import java.io.IOException;
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import java.math.BigInteger;
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73
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2
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/**
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* Implements the ASN.1 KDC-REP type.
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*
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* <xmp>
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* KDC-REP ::= SEQUENCE {
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* pvno [0] INTEGER (5),
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* msg-type [1] INTEGER (11 -- AS -- | 13 -- TGS --),
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* padata [2] SEQUENCE OF PA-DATA OPTIONAL
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* -- NOTE: not empty --,
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* crealm [3] Realm,
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* cname [4] PrincipalName,
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* ticket [5] Ticket,
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* enc-part [6] EncryptedData
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* -- EncASRepPart or EncTGSRepPart,
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* -- as appropriate
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* }
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* </xmp>
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*
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* <p>
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* This definition reflects the Network Working Group RFC 4120
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* specification available at
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* <a href="http://www.ietf.org/rfc/rfc4120.txt">
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* http://www.ietf.org/rfc/rfc4120.txt</a>.
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*/
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public class KDCRep {
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public Realm crealm;
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public PrincipalName cname;
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public Ticket ticket;
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public EncryptedData encPart;
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public EncKDCRepPart encKDCRepPart; //not part of ASN.1 encoding
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private int pvno;
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private int msgType;
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private PAData[] pAData = null; //optional
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private boolean DEBUG = Krb5.DEBUG;
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2
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public KDCRep(
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PAData[] new_pAData,
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Realm new_crealm,
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PrincipalName new_cname,
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Ticket new_ticket,
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EncryptedData new_encPart,
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int req_type) throws IOException {
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pvno = Krb5.PVNO;
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msgType = req_type;
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if (new_pAData != null) {
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pAData = new PAData[new_pAData.length];
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for (int i = 0; i < new_pAData.length; i++) {
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if (new_pAData[i] == null) {
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throw new IOException("Cannot create a KDCRep");
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} else {
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pAData[i] = (PAData) new_pAData[i].clone();
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}
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}
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}
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crealm = new_crealm;
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cname = new_cname;
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ticket = new_ticket;
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encPart = new_encPart;
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}
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public KDCRep() {
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}
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public KDCRep(byte[] data, int req_type) throws Asn1Exception,
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KrbApErrException, RealmException, IOException {
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init(new DerValue(data), req_type);
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}
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public KDCRep(DerValue encoding, int req_type) throws Asn1Exception,
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RealmException, KrbApErrException, IOException {
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init(encoding, req_type);
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}
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/*
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// Not used? Don't know what keyusage to use here %%%
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public void decrypt(EncryptionKey key) throws Asn1Exception,
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IOException, KrbException, RealmException {
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encKDCRepPart = new EncKDCRepPart(encPart.decrypt(key), msgType);
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}
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*/
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/**
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* Initializes an KDCRep object.
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*
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* @param encoding a single DER-encoded value.
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* @param req_type reply message type.
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* @exception Asn1Exception if an error occurs while decoding an ASN1 encoded data.
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* @exception IOException if an I/O error occurs while reading encoded data.
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* @exception RealmException if an error occurs while constructing
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* a Realm object from DER-encoded data.
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* @exception KrbApErrException if the value read from the DER-encoded
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* data stream does not match the pre-defined value.
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*
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*/
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protected void init(DerValue encoding, int req_type)
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throws Asn1Exception, RealmException, IOException,
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KrbApErrException {
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DerValue der, subDer;
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if ((encoding.getTag() & 0x1F) != req_type) {
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if (DEBUG) {
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System.out.println(">>> KDCRep: init() " +
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"encoding tag is " +
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encoding.getTag() +
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" req type is " + req_type);
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}
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throw new Asn1Exception(Krb5.ASN1_BAD_ID);
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}
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der = encoding.getData().getDerValue();
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if (der.getTag() != DerValue.tag_Sequence) {
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throw new Asn1Exception(Krb5.ASN1_BAD_ID);
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}
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subDer = der.getData().getDerValue();
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if ((subDer.getTag() & 0x1F) == 0x00) {
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pvno = subDer.getData().getBigInteger().intValue();
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if (pvno != Krb5.PVNO) {
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throw new KrbApErrException(Krb5.KRB_AP_ERR_BADVERSION);
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}
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} else {
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throw new Asn1Exception(Krb5.ASN1_BAD_ID);
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}
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subDer = der.getData().getDerValue();
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if ((subDer.getTag() & 0x1F) == 0x01) {
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msgType = subDer.getData().getBigInteger().intValue();
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if (msgType != req_type) {
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throw new KrbApErrException(Krb5.KRB_AP_ERR_MSG_TYPE);
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}
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} else {
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throw new Asn1Exception(Krb5.ASN1_BAD_ID);
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}
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if ((der.getData().peekByte() & 0x1F) == 0x02) {
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subDer = der.getData().getDerValue();
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DerValue[] padata = subDer.getData().getSequence(1);
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pAData = new PAData[padata.length];
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for (int i = 0; i < padata.length; i++) {
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pAData[i] = new PAData(padata[i]);
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}
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} else {
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pAData = null;
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}
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crealm = Realm.parse(der.getData(), (byte) 0x03, false);
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cname = PrincipalName.parse(der.getData(), (byte) 0x04, false);
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ticket = Ticket.parse(der.getData(), (byte) 0x05, false);
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encPart = EncryptedData.parse(der.getData(), (byte) 0x06, false);
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if (der.getData().available() > 0) {
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throw new Asn1Exception(Krb5.ASN1_BAD_ID);
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}
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}
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/**
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* Encodes this object to a byte array.
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* @return byte array of encoded APReq object.
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* @exception Asn1Exception if an error occurs while decoding an ASN1 encoded data.
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* @exception IOException if an I/O error occurs while reading encoded data.
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*
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*/
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public byte[] asn1Encode() throws Asn1Exception, IOException {
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DerOutputStream bytes = new DerOutputStream();
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DerOutputStream temp = new DerOutputStream();
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temp.putInteger(BigInteger.valueOf(pvno));
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bytes.write(DerValue.createTag(DerValue.TAG_CONTEXT,
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true, (byte) 0x00), temp);
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temp = new DerOutputStream();
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temp.putInteger(BigInteger.valueOf(msgType));
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bytes.write(DerValue.createTag(DerValue.TAG_CONTEXT,
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true, (byte) 0x01), temp);
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if (pAData != null && pAData.length > 0) {
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DerOutputStream padata_stream = new DerOutputStream();
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for (int i = 0; i < pAData.length; i++) {
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padata_stream.write(pAData[i].asn1Encode());
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}
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temp = new DerOutputStream();
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temp.write(DerValue.tag_SequenceOf, padata_stream);
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bytes.write(DerValue.createTag(DerValue.TAG_CONTEXT,
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true, (byte) 0x02), temp);
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}
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bytes.write(DerValue.createTag(DerValue.TAG_CONTEXT,
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true, (byte) 0x03), crealm.asn1Encode());
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bytes.write(DerValue.createTag(DerValue.TAG_CONTEXT,
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true, (byte) 0x04), cname.asn1Encode());
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bytes.write(DerValue.createTag(DerValue.TAG_CONTEXT,
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true, (byte) 0x05), ticket.asn1Encode());
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bytes.write(DerValue.createTag(DerValue.TAG_CONTEXT,
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true, (byte) 0x06), encPart.asn1Encode());
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temp = new DerOutputStream();
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temp.write(DerValue.tag_Sequence, bytes);
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return temp.toByteArray();
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}
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}
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