/*
* 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.components.EncKrbPrivPart;
import org.apache.directory.shared.asn1.der.ASN1OutputStream;
import org.apache.directory.shared.asn1.der.DERApplicationSpecific;
import org.apache.directory.shared.asn1.der.DERInteger;
import org.apache.directory.shared.asn1.der.DEROctetString;
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: 547131 $, $Date: 2007-06-14 07:41:06 +0200 (Jeu, 14 jui 2007) $
*/
public class EncKrbPrivPartEncoder implements Encoder, EncoderFactory
{
private static final int APPLICATION_CODE = 28;
public Encoder getEncoder()
{
return new EncKrbPrivPartEncoder();
}
public byte[] encode( Encodable privPart ) throws IOException
{
ByteArrayOutputStream baos = new ByteArrayOutputStream();
ASN1OutputStream aos = new ASN1OutputStream( baos );
DERSequence privPartSequence = encodePrivatePartSequence( ( EncKrbPrivPart ) privPart );
aos.writeObject( DERApplicationSpecific.valueOf( APPLICATION_CODE, privPartSequence ) );
aos.close();
return baos.toByteArray();
}
/**
* Encodes an {@link EncKrbPrivPart} into a {@link DERSequence}.
*
* EncKrbPrivPart ::= [APPLICATION 28] SEQUENCE {
* user-data [0] OCTET STRING,
* timestamp [1] KerberosTime OPTIONAL,
* usec [2] Microseconds OPTIONAL,
* seq-number [3] UInt32 OPTIONAL,
* s-address [4] HostAddress -- sender's addr --,
* r-address [5] HostAddress OPTIONAL -- recip's addr
* }
*
* @param message
* @return The {@link DERSequence};
*/
private DERSequence encodePrivatePartSequence( EncKrbPrivPart message )
{
DERSequence sequence = new DERSequence();
sequence.add( new DERTaggedObject( 0, new DEROctetString( message.getUserData() ) ) );
if ( message.getTimestamp() != null )
{
sequence.add( new DERTaggedObject( 1, KerberosTimeEncoder.encode( message.getTimestamp() ) ) );
}
if ( message.getMicroSecond() != null )
{
sequence.add( new DERTaggedObject( 2, DERInteger.valueOf( message.getMicroSecond().intValue() ) ) );
}
if ( message.getSequenceNumber() != null )
{
sequence.add( new DERTaggedObject( 3, DERInteger.valueOf( message.getSequenceNumber().intValue() ) ) );
}
sequence.add( new DERTaggedObject( 4, HostAddressesEncoder.encode( message.getSenderAddress() ) ) );
if ( message.getRecipientAddress() != null )
{
sequence.add( new DERTaggedObject( 5, HostAddressesEncoder.encode( message.getRecipientAddress() ) ) );
}
return sequence;
}
}