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 */
020
021package org.apache.directory.shared.kerberos.codec.encTicketPart.actions;
022
023
024import org.apache.directory.api.asn1.DecoderException;
025import org.apache.directory.api.asn1.ber.Asn1Decoder;
026import org.apache.directory.api.asn1.ber.grammar.GrammarAction;
027import org.apache.directory.api.asn1.ber.tlv.TLV;
028import org.apache.directory.api.i18n.I18n;
029import org.apache.directory.shared.kerberos.codec.encTicketPart.EncTicketPartContainer;
030import org.apache.directory.shared.kerberos.codec.transitedEncoding.TransitedEncodingContainer;
031import org.apache.directory.shared.kerberos.components.TransitedEncoding;
032import org.slf4j.Logger;
033import org.slf4j.LoggerFactory;
034
035
036/**
037 * Store the transited value of EncTicketPart.
038 *
039 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
040 */
041public class StoreTransited extends GrammarAction<EncTicketPartContainer>
042{
043    /** The logger */
044    private static final Logger LOG = LoggerFactory.getLogger( StoreTransited.class );
045
046    /** Speedup for logs */
047    private static final boolean IS_DEBUG = LOG.isDebugEnabled();
048
049
050    /**
051     * Creates a new instance of StoreTransited.
052     */
053    public StoreTransited()
054    {
055        super( "EncTicketPart transited" );
056    }
057
058
059    /**
060     * {@inheritDoc}
061     */
062    public void action( EncTicketPartContainer encTicketPartContainer ) throws DecoderException
063    {
064        TLV tlv = encTicketPartContainer.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        TransitedEncodingContainer transitedContainer = new TransitedEncodingContainer();
076
077        // Now, let's decode the TransitedEncoding
078        Asn1Decoder.decode( encTicketPartContainer.getStream(), transitedContainer );
079
080        TransitedEncoding te = transitedContainer.getTransitedEncoding();
081
082        if ( IS_DEBUG )
083        {
084            LOG.debug( "TransitedEncoding {}", te );
085        }
086
087        encTicketPartContainer.getEncTicketPart().setTransited( te );
088
089        // Update the expected length for the current TLV
090        tlv.setExpectedLength( tlv.getExpectedLength() - tlv.getLength() );
091
092        // Update the parent
093        encTicketPartContainer.updateParent();
094    }
095}