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.methodData.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.codec.methodData.MethodDataContainer; 029import org.apache.directory.shared.kerberos.codec.padata.PaDataContainer; 030import org.apache.directory.shared.kerberos.components.PaData; 031import org.slf4j.Logger; 032import org.slf4j.LoggerFactory; 033 034 035/** 036 * The action used to add an PA-DATA object 037 * 038 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> 039 */ 040public class AddPaData extends GrammarAction<MethodDataContainer> 041{ 042 /** The logger */ 043 private static final Logger LOG = LoggerFactory.getLogger( AddPaData.class ); 044 045 /** Speedup for logs */ 046 private static final boolean IS_DEBUG = LOG.isDebugEnabled(); 047 048 049 /** 050 * Instantiates a new AddPaData action. 051 */ 052 public AddPaData() 053 { 054 super( "Add a PA-DATA instance" ); 055 } 056 057 058 /** 059 * {@inheritDoc} 060 */ 061 public void action( MethodDataContainer methodDataContainer ) throws DecoderException 062 { 063 TLV tlv = methodDataContainer.getCurrentTLV(); 064 065 // The Length should not be null 066 if ( tlv.getLength() == 0 ) 067 { 068 LOG.error( I18n.err( I18n.ERR_01308_ZERO_LENGTH_TLV ) ); 069 070 // This will generate a PROTOCOL_ERROR 071 throw new DecoderException( I18n.err( I18n.ERR_01309_EMPTY_TLV ) ); 072 } 073 074 // Now, let's decode the PA-DATA 075 PaDataContainer paDataContainer = new PaDataContainer(); 076 paDataContainer.setStream( methodDataContainer.getStream() ); 077 078 // Compute the start position in the stream for the PA-DATA to decode : 079 // We have to move back to the PA-DATA tag 080 methodDataContainer.rewind(); 081 082 // Decode the PA-DATA PDU 083 Asn1Decoder.decode( methodDataContainer.getStream(), paDataContainer ); 084 085 // Update the expected length for the current TLV 086 tlv.setExpectedLength( tlv.getExpectedLength() - tlv.getLength() ); 087 088 // Update the parent 089 methodDataContainer.updateParent(); 090 091 // Store the PA-DATA in the container 092 PaData paData = paDataContainer.getPaData(); 093 methodDataContainer.addPaData( paData ); 094 095 if ( IS_DEBUG ) 096 { 097 LOG.debug( "PA-DATA added : {}", paData ); 098 } 099 100 methodDataContainer.setGrammarEndAllowed( true ); 101 } 102}