/*
* 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.ApplicationRequest;
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.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: 2007-05-21 17:00:43 -0700 (Mon, 21 May 2007) $
*/
public class ApplicationRequestEncoder
{
/**
* Application code constant for the {@link ApplicationRequest} (14).
*/
public static final int APPLICATION_CODE = 14;
/**
* Encodes an {@link ApplicationRequest} into a byte array.
*
* @param request
* @return The byte array.
* @throws IOException
*/
public byte[] encode( ApplicationRequest request ) throws IOException
{
ByteArrayOutputStream baos = new ByteArrayOutputStream();
ASN1OutputStream aos = new ASN1OutputStream( baos );
DERSequence requestSequence = encodeReplySequence( request );
aos.writeObject( DERApplicationSpecific.valueOf( APPLICATION_CODE, requestSequence ) );
aos.close();
return baos.toByteArray();
}
/*
AP-REQ ::= [APPLICATION 14] SEQUENCE {
pvno[0] INTEGER,
msg-type[1] INTEGER,
ap-options[2] APOptions,
ticket[3] Ticket,
authenticator[4] EncryptedData
}
*/
private DERSequence encodeReplySequence( ApplicationRequest message )
{
DERSequence sequence = new DERSequence();
sequence.add( new DERTaggedObject( 0, DERInteger.valueOf( message.getProtocolVersionNumber() ) ) );
sequence.add( new DERTaggedObject( 1, DERInteger.valueOf( message.getMessageType().getOrdinal() ) ) );
sequence.add( new DERTaggedObject( 2, new DERBitString( message.getApOptions().getBytes() ) ) );
sequence.add( new DERTaggedObject( 3, TicketEncoder.encode( message.getTicket() ) ) );
sequence.add( new DERTaggedObject( 4, EncryptedDataEncoder.encodeSequence( message.getEncPart() ) ) );
return sequence;
}
}