/*
* 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.internal;
import sun.security.krb5.PrincipalName;
import sun.security.krb5.EncryptedData;
import sun.security.krb5.Asn1Exception;
import sun.security.krb5.Realm;
import sun.security.krb5.RealmException;
import sun.security.util.*;
import java.io.IOException;
import java.math.BigInteger;
/**
* Implements the ASN.1 Ticket type.
*
* <xmp>
* Ticket ::= [APPLICATION 1] SEQUENCE {
* tkt-vno [0] INTEGER (5),
* realm [1] Realm,
* sname [2] PrincipalName,
* enc-part [3] EncryptedData -- EncTicketPart
* }
* </xmp>
*
* <p>
* This definition reflects the Network Working Group RFC 4120
* specification available at
* <a href="http://www.ietf.org/rfc/rfc4120.txt">
* http://www.ietf.org/rfc/rfc4120.txt</a>.
*/
public class Ticket implements Cloneable {
public int tkt_vno;
public Realm realm;
public PrincipalName sname;
public EncryptedData encPart;
private Ticket() {
}
public Object clone() {
Ticket new_ticket = new Ticket();
new_ticket.realm = (Realm)realm.clone();
new_ticket.sname = (PrincipalName)sname.clone();
new_ticket.encPart = (EncryptedData)encPart.clone();
new_ticket.tkt_vno = tkt_vno;
return new_ticket;
}
public Ticket(
Realm new_realm,
PrincipalName new_sname,
EncryptedData new_encPart
) {
tkt_vno = Krb5.TICKET_VNO;
realm = new_realm;
sname = new_sname;
encPart = new_encPart;
}
public Ticket(byte[] data) throws Asn1Exception,
RealmException, KrbApErrException, IOException {
init(new DerValue(data));
}
public Ticket(DerValue encoding) throws Asn1Exception,
RealmException, KrbApErrException, IOException {
init(encoding);
}
/**
* Initializes a Ticket object.
* @param encoding a single DER-encoded value.
* @exception Asn1Exception if an error occurs while decoding an ASN1 encoded data.
* @exception IOException if an I/O error occurs while reading encoded data.
* @exception KrbApErrException if the value read from the DER-encoded data stream does not match the pre-defined value.
* @exception RealmException if an error occurs while parsing a Realm object.
*/
private void init(DerValue encoding) throws Asn1Exception,
RealmException, KrbApErrException, IOException {
DerValue der;
DerValue subDer;
if (((encoding.getTag() & (byte)0x1F) != Krb5.KRB_TKT)
|| (encoding.isApplication() != true)
|| (encoding.isConstructed() != true))
throw new Asn1Exception(Krb5.ASN1_BAD_ID);
der = encoding.getData().getDerValue();
if (der.getTag() != DerValue.tag_Sequence)
throw new Asn1Exception(Krb5.ASN1_BAD_ID);
subDer = der.getData().getDerValue();
if ((subDer.getTag() & (byte)0x1F) != (byte)0x00)
throw new Asn1Exception(Krb5.ASN1_BAD_ID);
tkt_vno = subDer.getData().getBigInteger().intValue();
if (tkt_vno != Krb5.TICKET_VNO)
throw new KrbApErrException(Krb5.KRB_AP_ERR_BADVERSION);
realm = Realm.parse(der.getData(), (byte)0x01, false);
sname = PrincipalName.parse(der.getData(), (byte)0x02, false);
encPart = EncryptedData.parse(der.getData(), (byte)0x03, false);
if (der.getData().available() > 0)
throw new Asn1Exception(Krb5.ASN1_BAD_ID);
}
/**
* Encodes a Ticket object.
* @return byte array of encoded ticket object.
* @exception Asn1Exception if an error occurs while decoding an ASN1 encoded data.
* @exception IOException if an I/O error occurs while reading encoded data.
*/
public byte[] asn1Encode() throws Asn1Exception, IOException {
DerOutputStream bytes = new DerOutputStream();
DerOutputStream temp = new DerOutputStream();
DerValue der[] = new DerValue[4];
temp.putInteger(BigInteger.valueOf(tkt_vno));
bytes.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte)0x00), temp);
bytes.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte)0x01), realm.asn1Encode());
bytes.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte)0x02), sname.asn1Encode());
bytes.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte)0x03), encPart.asn1Encode());
temp = new DerOutputStream();
temp.write(DerValue.tag_Sequence, bytes);
DerOutputStream ticket = new DerOutputStream();
ticket.write(DerValue.createTag(DerValue.TAG_APPLICATION, true, (byte)0x01), temp);
return ticket.toByteArray();
}
/**
* Parse (unmarshal) a Ticket from a DER input stream. This form
* parsing might be used when expanding a value which is part of
* a constructed sequence and uses explicitly tagged type.
*
* @exception Asn1Exception on error.
* @param data the Der input stream value, which contains one or more marshaled value.
* @param explicitTag tag number.
* @param optional indicate if this data field is optional
* @return an instance of Ticket.
*/
public static Ticket parse(DerInputStream data, byte explicitTag, boolean optional) throws Asn1Exception, IOException, RealmException, KrbApErrException {
if ((optional) && (((byte)data.peekByte() & (byte)0x1F)!= explicitTag))
return null;
DerValue der = data.getDerValue();
if (explicitTag != (der.getTag() & (byte)0x1F)) {
throw new Asn1Exception(Krb5.ASN1_BAD_ID);
}
else {
DerValue subDer = der.getData().getDerValue();
return new Ticket(subDer);
}
}
}