/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*
*/
package org.apache.directory.server.kerberos.shared.io.encoder;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import org.apache.directory.server.kerberos.shared.messages.Encodable;
import org.apache.directory.server.kerberos.shared.messages.KdcReply;
import org.apache.directory.shared.asn1.der.ASN1OutputStream;
import org.apache.directory.shared.asn1.der.DERApplicationSpecific;
import org.apache.directory.shared.asn1.der.DERBitString;
import org.apache.directory.shared.asn1.der.DERGeneralString;
import org.apache.directory.shared.asn1.der.DERInteger;
import org.apache.directory.shared.asn1.der.DERSequence;
import org.apache.directory.shared.asn1.der.DERTaggedObject;
/**
* @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
* @version $Rev: 540371 $, $Date: 2007-05-22 02:00:43 +0200 (Mar, 22 mai 2007) $
*/
public abstract class EncKdcRepPartEncoder implements Encoder
{
private int applicationCode;
protected EncKdcRepPartEncoder(int applicationCode)
{
this.applicationCode = applicationCode;
}
public byte[] encode( Encodable app ) throws IOException
{
ByteArrayOutputStream baos = new ByteArrayOutputStream();
ASN1OutputStream aos = new ASN1OutputStream( baos );
DERSequence initialSequence = encodeInitialSequence( ( KdcReply ) app );
aos.writeObject( DERApplicationSpecific.valueOf( applicationCode, initialSequence ) );
return baos.toByteArray();
}
/**
* EncKDCRepPart ::= SEQUENCE {
* key[0] EncryptionKey,
* last-req[1] LastReq,
*
* nonce[2] INTEGER,
* key-expiration[3] KerberosTime OPTIONAL,
* flags[4] TicketFlags,
* authtime[5] KerberosTime,
* starttime[6] KerberosTime OPTIONAL,
* endtime[7] KerberosTime,
* renew-till[8] KerberosTime OPTIONAL,
* srealm[9] Realm,
* sname[10] PrincipalName,
* caddr[11] HostAddresses OPTIONAL
* }
*/
protected DERSequence encodeInitialSequence( KdcReply reply )
{
DERSequence sequence = new DERSequence();
sequence.add( new DERTaggedObject( 0, EncryptionKeyEncoder.encodeSequence( reply.getKey() ) ) );
sequence.add( new DERTaggedObject( 1, LastRequestEncoder.encode( reply.getLastRequest() ) ) );
sequence.add( new DERTaggedObject( 2, DERInteger.valueOf( reply.getNonce() ) ) );
// OPTIONAL
if ( reply.getKeyExpiration() != null )
{
sequence.add( new DERTaggedObject( 3, KerberosTimeEncoder.encode( reply.getKeyExpiration() ) ) );
}
sequence.add( new DERTaggedObject( 4, new DERBitString( reply.getFlags().getBytes() ) ) );
sequence.add( new DERTaggedObject( 5, KerberosTimeEncoder.encode( reply.getAuthTime() ) ) );
// OPTIONAL
if ( reply.getStartTime() != null )
{
sequence.add( new DERTaggedObject( 6, KerberosTimeEncoder.encode( reply.getStartTime() ) ) );
}
sequence.add( new DERTaggedObject( 7, KerberosTimeEncoder.encode( reply.getEndTime() ) ) );
// OPTIONAL
if ( reply.getRenewTill() != null )
{
sequence.add( new DERTaggedObject( 8, KerberosTimeEncoder.encode( reply.getRenewTill() ) ) );
}
sequence.add( new DERTaggedObject( 9, DERGeneralString.valueOf( reply.getServerRealm().toString() ) ) );
sequence.add( new DERTaggedObject( 10, PrincipalNameEncoder.encode( reply.getServerPrincipal() ) ) );
// OPTIONAL
if ( reply.getClientAddresses() != null )
{
sequence.add( new DERTaggedObject( 11, HostAddressesEncoder.encodeSequence( reply.getClientAddresses() ) ) );
}
return sequence;
}
}