/*
* 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.decoder;
import java.io.IOException;
import java.util.Enumeration;
import org.apache.directory.server.kerberos.shared.messages.Encodable;
import org.apache.directory.server.kerberos.shared.messages.components.EncKrbPrivPart;
import org.apache.directory.server.kerberos.shared.messages.components.EncKrbPrivPartModifier;
import org.apache.directory.shared.asn1.der.ASN1InputStream;
import org.apache.directory.shared.asn1.der.DERApplicationSpecific;
import org.apache.directory.shared.asn1.der.DEREncodable;
import org.apache.directory.shared.asn1.der.DERGeneralizedTime;
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: 502338 $, $Date: 2007-02-01 20:59:43 +0100 (Jeu, 01 fév 2007) $
*/
public class EncKrbPrivPartDecoder implements Decoder, DecoderFactory
{
public Decoder getDecoder()
{
return new EncKrbPrivPartDecoder();
}
public Encodable decode( byte[] encodedPrivatePart ) throws IOException
{
ASN1InputStream ais = new ASN1InputStream( encodedPrivatePart );
DERApplicationSpecific app = ( DERApplicationSpecific ) ais.readObject();
DERSequence privatePart = ( DERSequence ) app.getObject();
return decodePrivatePartSequence( privatePart );
}
private EncKrbPrivPart decodePrivatePartSequence( DERSequence sequence )
{
EncKrbPrivPartModifier modifier = new EncKrbPrivPartModifier();
for ( Enumeration e = sequence.getObjects(); e.hasMoreElements(); )
{
DERTaggedObject object = ( DERTaggedObject ) e.nextElement();
int tag = object.getTagNo();
DEREncodable derObject = object.getObject();
switch ( tag )
{
case 0:
DEROctetString tag0 = ( DEROctetString ) derObject;
modifier.setUserData( tag0.getOctets() );
break;
case 1:
DERGeneralizedTime tag1 = ( DERGeneralizedTime ) derObject;
modifier.setTimestamp( KerberosTimeDecoder.decode( tag1 ) );
break;
case 2:
DERInteger tag2 = ( DERInteger ) derObject;
modifier.setMicroSecond( new Integer( tag2.intValue() ) );
break;
case 3:
DERInteger tag3 = ( DERInteger ) derObject;
modifier.setSequenceNumber( new Integer( tag3.intValue() ) );
break;
case 4:
DERSequence tag4 = ( DERSequence ) derObject;
modifier.setSenderAddress( HostAddressDecoder.decode( tag4 ) );
break;
case 5:
DERSequence tag5 = ( DERSequence ) derObject;
modifier.setRecipientAddress( HostAddressDecoder.decode( tag5 ) );
break;
}
}
return modifier.getEncKrbPrivPart();
}
}