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.tgsReq.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.kdcReq.KdcReqContainer; 030import org.apache.directory.shared.kerberos.codec.tgsReq.TgsReqContainer; 031import org.apache.directory.shared.kerberos.messages.TgsReq; 032import org.slf4j.Logger; 033import org.slf4j.LoggerFactory; 034 035 036/** 037 * The action used to add a KDC-REQ object 038 * 039 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> 040 */ 041public class StoreKdcReq extends GrammarAction<TgsReqContainer> 042{ 043 /** The logger */ 044 private static final Logger LOG = LoggerFactory.getLogger( StoreKdcReq.class ); 045 046 /** Speedup for logs */ 047 private static final boolean IS_DEBUG = LOG.isDebugEnabled(); 048 049 050 /** 051 * Instantiates a new KDC-REQ action. 052 */ 053 public StoreKdcReq() 054 { 055 super( "Add an KDC-REQ instance" ); 056 } 057 058 059 /** 060 * {@inheritDoc} 061 */ 062 public void action( TgsReqContainer tgsReqContainer ) throws DecoderException 063 { 064 TLV tlv = tgsReqContainer.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-REQ 076 KdcReqContainer kdcReqContainer = new KdcReqContainer( tgsReqContainer.getStream() ); 077 078 // Store the created TGS-REQ object into the KDC-REQ container 079 TgsReq tgsReq = new TgsReq(); 080 kdcReqContainer.setKdcReq( tgsReq ); 081 082 // Decode the KDC_REQ PDU 083 Asn1Decoder.decode( tgsReqContainer.getStream(), kdcReqContainer ); 084 085 // Update the expected length for the current TLV 086 tlv.setExpectedLength( tlv.getExpectedLength() - tlv.getLength() ); 087 088 // Update the parent 089 tgsReqContainer.updateParent(); 090 091 if ( tgsReq.getMessageType() != KerberosMessageType.TGS_REQ ) 092 { 093 throw new DecoderException( "Bad message type" ); 094 } 095 096 tgsReqContainer.setTgsReq( tgsReq ); 097 098 if ( IS_DEBUG ) 099 { 100 LOG.debug( "TGS-REQ : {}", tgsReq ); 101 } 102 103 tgsReqContainer.setGrammarEndAllowed( true ); 104 } 105}