/*
* 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. Sun designates this
* particular file as subject to the "Classpath" exception as provided
* by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
* CA 95054 USA or visit www.sun.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.EncryptedData;
import sun.security.krb5.Asn1Exception;
import sun.security.krb5.RealmException;
import sun.security.util.*;
import java.util.Vector;
import java.io.IOException;
import java.math.BigInteger;
/**
* Implements the ASN.1 Authenticator type.
*
* <xmp>
* KRB-CRED ::= [APPLICATION 22] SEQUENCE {
* pvno [0] INTEGER (5),
* msg-type [1] INTEGER (22),
* tickets [2] SEQUENCE OF Ticket,
* enc-part [3] EncryptedData -- EncKrbCredPart
* }
* </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 KRBCred {
public Ticket[] tickets = null;
public EncryptedData encPart;
private int pvno;
private int msgType;
public KRBCred(Ticket[] new_tickets, EncryptedData new_encPart) throws IOException {
pvno = Krb5.PVNO;
msgType = Krb5.KRB_CRED;
if (new_tickets != null) {
tickets = new Ticket[new_tickets.length];
for (int i = 0; i < new_tickets.length; i++) {
if (new_tickets[i] == null) {
throw new IOException("Cannot create a KRBCred");
} else {
tickets[i] = (Ticket)new_tickets[i].clone();
}
}
}
encPart = new_encPart;
}
public KRBCred(byte[] data) throws Asn1Exception,
RealmException, KrbApErrException, IOException {
init(new DerValue(data));
}
public KRBCred(DerValue encoding) throws Asn1Exception,
RealmException, KrbApErrException, IOException {
init(encoding);
}
/**
* Initializes an KRBCred 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 {
if (((encoding.getTag() & (byte)0x1F) != (byte)0x16)
|| (encoding.isApplication() != true)
|| (encoding.isConstructed() != true))
throw new Asn1Exception(Krb5.ASN1_BAD_ID);
DerValue der, subDer;
der = encoding.getData().getDerValue();
if (der.getTag() != DerValue.tag_Sequence)
throw new Asn1Exception(Krb5.ASN1_BAD_ID);
subDer = der.getData().getDerValue();
if ((subDer.getTag() & 0x1F) == 0x00) {
pvno = subDer.getData().getBigInteger().intValue();
if (pvno != Krb5.PVNO) {
throw new KrbApErrException(Krb5.KRB_AP_ERR_BADVERSION);
}
}
else
throw new Asn1Exception(Krb5.ASN1_BAD_ID);
subDer = der.getData().getDerValue();
if ((subDer.getTag() & 0x1F) == 0x01) {
msgType = subDer.getData().getBigInteger().intValue();
if (msgType != Krb5.KRB_CRED)
throw new KrbApErrException(Krb5.KRB_AP_ERR_MSG_TYPE);
}
else
throw new Asn1Exception(Krb5.ASN1_BAD_ID);
subDer = der.getData().getDerValue();
if ((subDer.getTag() & 0x1F) == 0x02) {
DerValue subsubDer = subDer.getData().getDerValue();
if (subsubDer.getTag() != DerValue.tag_SequenceOf) {
throw new Asn1Exception(Krb5.ASN1_BAD_ID);
}
Vector<Ticket> v = new Vector<Ticket> ();
while (subsubDer.getData().available() > 0) {
v.addElement(new Ticket(subsubDer.getData().getDerValue()));
}
if (v.size() > 0) {
tickets = new Ticket[v.size()];
v.copyInto(tickets);
}
}
else
throw new Asn1Exception(Krb5.ASN1_BAD_ID);
encPart = EncryptedData.parse(der.getData(), (byte)0x03, false);
if (der.getData().available() > 0)
throw new Asn1Exception(Krb5.ASN1_BAD_ID);
}
/**
* Encodes an KRBCred object.
* @return the data of encoded EncAPRepPart 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 temp, bytes, out;
temp = new DerOutputStream();
temp.putInteger(BigInteger.valueOf(pvno));
out = new DerOutputStream();
out.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte)0x00), temp);
temp = new DerOutputStream();
temp.putInteger(BigInteger.valueOf(msgType));
out.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte)0x01), temp);
temp = new DerOutputStream();
for (int i = 0; i < tickets.length; i++) {
temp.write(tickets[i].asn1Encode());
}
bytes = new DerOutputStream();
bytes.write(DerValue.tag_SequenceOf, temp);
out.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte)0x02), bytes);
out.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte)0x03), encPart.asn1Encode());
bytes = new DerOutputStream();
bytes.write(DerValue.tag_Sequence, out);
out = new DerOutputStream();
out.write(DerValue.createTag(DerValue.TAG_APPLICATION, true, (byte)0x16), bytes);
return out.toByteArray();
}
}