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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. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* 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.PrincipalName;
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import sun.security.krb5.EncryptedData;
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import sun.security.krb5.Asn1Exception;
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import sun.security.krb5.Realm;
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import sun.security.krb5.RealmException;
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import sun.security.util.*;
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import java.io.IOException;
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import java.math.BigInteger;
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/**
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* Implements the ASN.1 Ticket type.
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*
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* <xmp>
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* Ticket ::= [APPLICATION 1] SEQUENCE {
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* tkt-vno [0] INTEGER (5),
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* realm [1] Realm,
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* sname [2] PrincipalName,
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* enc-part [3] EncryptedData -- EncTicketPart
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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 Ticket implements Cloneable {
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public int tkt_vno;
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public PrincipalName sname;
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public EncryptedData encPart;
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private Ticket() {
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}
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public Object clone() {
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Ticket new_ticket = new Ticket();
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new_ticket.sname = (PrincipalName)sname.clone();
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new_ticket.encPart = (EncryptedData)encPart.clone();
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new_ticket.tkt_vno = tkt_vno;
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return new_ticket;
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}
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public Ticket(
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PrincipalName new_sname,
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EncryptedData new_encPart
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) {
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tkt_vno = Krb5.TICKET_VNO;
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sname = new_sname;
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encPart = new_encPart;
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}
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public Ticket(byte[] data) throws Asn1Exception,
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RealmException, KrbApErrException, IOException {
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init(new DerValue(data));
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}
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public Ticket(DerValue encoding) throws Asn1Exception,
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RealmException, KrbApErrException, IOException {
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init(encoding);
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}
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/**
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* Initializes a Ticket object.
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* @param encoding a single DER-encoded value.
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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 KrbApErrException if the value read from the DER-encoded data stream does not match the pre-defined value.
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* @exception RealmException if an error occurs while parsing a Realm object.
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*/
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private void init(DerValue encoding) throws Asn1Exception,
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RealmException, KrbApErrException, IOException {
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DerValue der;
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DerValue subDer;
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if (((encoding.getTag() & (byte)0x1F) != Krb5.KRB_TKT)
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|| (encoding.isApplication() != true)
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|| (encoding.isConstructed() != true))
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throw new Asn1Exception(Krb5.ASN1_BAD_ID);
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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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subDer = der.getData().getDerValue();
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if ((subDer.getTag() & (byte)0x1F) != (byte)0x00)
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throw new Asn1Exception(Krb5.ASN1_BAD_ID);
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tkt_vno = subDer.getData().getBigInteger().intValue();
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if (tkt_vno != Krb5.TICKET_VNO)
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throw new KrbApErrException(Krb5.KRB_AP_ERR_BADVERSION);
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Realm srealm = Realm.parse(der.getData(), (byte)0x01, false);
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sname = PrincipalName.parse(der.getData(), (byte)0x02, false, srealm);
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encPart = EncryptedData.parse(der.getData(), (byte)0x03, 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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* Encodes a Ticket object.
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* @return byte array of encoded ticket 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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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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DerValue der[] = new DerValue[4];
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temp.putInteger(BigInteger.valueOf(tkt_vno));
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bytes.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte)0x00), temp);
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bytes.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte)0x01), sname.getRealm().asn1Encode());
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bytes.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte)0x02), sname.asn1Encode());
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bytes.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte)0x03), encPart.asn1Encode());
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temp = new DerOutputStream();
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temp.write(DerValue.tag_Sequence, bytes);
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DerOutputStream ticket = new DerOutputStream();
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ticket.write(DerValue.createTag(DerValue.TAG_APPLICATION, true, (byte)0x01), temp);
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return ticket.toByteArray();
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}
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/**
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* Parse (unmarshal) a Ticket from a DER input stream. This form
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* parsing might be used when expanding a value which is part of
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* a constructed sequence and uses explicitly tagged type.
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*
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* @exception Asn1Exception on error.
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* @param data the Der input stream value, which contains one or more marshaled value.
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* @param explicitTag tag number.
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* @param optional indicate if this data field is optional
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* @return an instance of Ticket.
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*/
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public static Ticket parse(DerInputStream data, byte explicitTag, boolean optional) throws Asn1Exception, IOException, RealmException, KrbApErrException {
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if ((optional) && (((byte)data.peekByte() & (byte)0x1F)!= explicitTag))
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return null;
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DerValue der = data.getDerValue();
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if (explicitTag != (der.getTag() & (byte)0x1F)) {
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throw new Asn1Exception(Krb5.ASN1_BAD_ID);
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}
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else {
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DerValue subDer = der.getData().getDerValue();
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return new Ticket(subDer);
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}
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}
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}
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