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.encryptionKey.actions;
021
022
023import org.apache.directory.api.asn1.DecoderException;
024import org.apache.directory.api.asn1.ber.grammar.GrammarAction;
025import org.apache.directory.api.asn1.ber.tlv.TLV;
026import org.apache.directory.server.i18n.I18n;
027import org.apache.directory.shared.kerberos.codec.encryptionKey.EncryptionKeyContainer;
028import org.apache.directory.shared.kerberos.components.EncryptionKey;
029import org.slf4j.Logger;
030import org.slf4j.LoggerFactory;
031
032
033/**
034 * The action used to initialize the EncryptionKey object
035 *
036 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
037 */
038public class EncryptionKeyInit extends GrammarAction<EncryptionKeyContainer>
039{
040    /** The logger */
041    private static final Logger LOG = LoggerFactory.getLogger( EncryptionKeyInit.class );
042
043    /** Speedup for logs */
044    private static final boolean IS_DEBUG = LOG.isDebugEnabled();
045
046
047    /**
048     * Instantiates a new EncryptionKeyInit action.
049     */
050    public EncryptionKeyInit()
051    {
052        super( "Creates a EncryptionKey instance" );
053    }
054
055
056    /**
057     * {@inheritDoc}
058     */
059    public void action( EncryptionKeyContainer encryptionKeyContainer ) throws DecoderException
060    {
061        TLV tlv = encryptionKeyContainer.getCurrentTLV();
062
063        // The Length should not be null
064        if ( tlv.getLength() == 0 )
065        {
066            LOG.error( I18n.err( I18n.ERR_744_NULL_PDU_LENGTH ) );
067
068            // This will generate a PROTOCOL_ERROR
069            throw new DecoderException( I18n.err( I18n.ERR_744_NULL_PDU_LENGTH ) );
070        }
071
072        EncryptionKey encKey = new EncryptionKey();
073        encryptionKeyContainer.setEncryptionKey( encKey );
074
075        if ( IS_DEBUG )
076        {
077            LOG.debug( "EncryptionKey created" );
078        }
079    }
080}