001/*
002 *  Licensed to the Apache Software Foundation (ASF) under one
003 *  or more contributor license agreements.  See the NOTICE file
004 *  distributed with this work for additional information
005 *  regarding copyright ownership.  The ASF licenses this file
006 *  to you under the Apache License, Version 2.0 (the
007 *  "License"); you may not use this file except in compliance
008 *  with the License.  You may obtain a copy of the License at
009 *
010 *    http://www.apache.org/licenses/LICENSE-2.0
011 *
012 *  Unless required by applicable law or agreed to in writing,
013 *  software distributed under the License is distributed on an
014 *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015 *  KIND, either express or implied.  See the License for the
016 *  specific language governing permissions and limitations
017 *  under the License.
018 *
019 */
020package org.apache.directory.shared.kerberos.codec.tgsRep.actions;
021
022
023import org.apache.directory.api.asn1.DecoderException;
024import org.apache.directory.api.asn1.ber.Asn1Decoder;
025import org.apache.directory.api.asn1.ber.grammar.GrammarAction;
026import org.apache.directory.api.asn1.ber.tlv.TLV;
027import org.apache.directory.api.i18n.I18n;
028import org.apache.directory.shared.kerberos.KerberosMessageType;
029import org.apache.directory.shared.kerberos.codec.kdcRep.KdcRepContainer;
030import org.apache.directory.shared.kerberos.codec.tgsRep.TgsRepContainer;
031import org.apache.directory.shared.kerberos.messages.TgsRep;
032import org.slf4j.Logger;
033import org.slf4j.LoggerFactory;
034
035
036/**
037 * The action used to add a KDC-REP object
038 *
039 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
040 */
041public class StoreKdcRep extends GrammarAction<TgsRepContainer>
042{
043    /** The logger */
044    private static final Logger LOG = LoggerFactory.getLogger( StoreKdcRep.class );
045
046    /** Speedup for logs */
047    private static final boolean IS_DEBUG = LOG.isDebugEnabled();
048
049
050    /**
051     * Instantiates a new KDC-REP action.
052     */
053    public StoreKdcRep()
054    {
055        super( "Add an KDC-REP instance" );
056    }
057
058
059    /**
060     * {@inheritDoc}
061     */
062    public void action( TgsRepContainer tgsRepContainer ) throws DecoderException
063    {
064        TLV tlv = tgsRepContainer.getCurrentTLV();
065
066        // The Length should not be null
067        if ( tlv.getLength() == 0 )
068        {
069            LOG.error( I18n.err( I18n.ERR_01308_ZERO_LENGTH_TLV ) );
070
071            // This will generate a PROTOCOL_ERROR
072            throw new DecoderException( I18n.err( I18n.ERR_01309_EMPTY_TLV ) );
073        }
074
075        // Now, let's decode the KDC-REP
076        KdcRepContainer kdcRepContainer = new KdcRepContainer( tgsRepContainer.getStream() );
077
078        // Store the created TGS-REP object into the KDC-REP container
079        TgsRep tgsRep = new TgsRep();
080        kdcRepContainer.setKdcRep( tgsRep );
081
082        // Decode the KDC_REP PDU
083        Asn1Decoder.decode( tgsRepContainer.getStream(), kdcRepContainer );
084
085        // Update the expected length for the current TLV
086        tlv.setExpectedLength( tlv.getExpectedLength() - tlv.getLength() );
087
088        // Update the parent
089        tgsRepContainer.updateParent();
090
091        if ( tgsRep.getMessageType() != KerberosMessageType.TGS_REP )
092        {
093            throw new DecoderException( "Bad message type" );
094        }
095
096        tgsRepContainer.setTgsRep( tgsRep );
097
098        if ( IS_DEBUG )
099        {
100            LOG.debug( "TGS-REP : {}", tgsRep );
101        }
102
103        tgsRepContainer.setGrammarEndAllowed( true );
104    }
105}