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.kdcReqBody.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.BerValue; 026import org.apache.directory.api.asn1.ber.tlv.IntegerDecoder; 027import org.apache.directory.api.asn1.ber.tlv.IntegerDecoderException; 028import org.apache.directory.api.asn1.ber.tlv.TLV; 029import org.apache.directory.api.i18n.I18n; 030import org.apache.directory.api.util.Strings; 031import org.apache.directory.shared.kerberos.codec.kdcReqBody.KdcReqBodyContainer; 032import org.apache.directory.shared.kerberos.codec.types.EncryptionType; 033import org.apache.directory.shared.kerberos.components.KdcReqBody; 034import org.slf4j.Logger; 035import org.slf4j.LoggerFactory; 036 037 038/** 039 * The action used to add an EType 040 * 041 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> 042 */ 043public class AddEType extends GrammarAction<KdcReqBodyContainer> 044{ 045 /** The logger */ 046 private static final Logger LOG = LoggerFactory.getLogger( AddEType.class ); 047 048 /** Speedup for logs */ 049 private static final boolean IS_DEBUG = LOG.isDebugEnabled(); 050 051 052 /** 053 * Instantiates a new AddEType action. 054 */ 055 public AddEType() 056 { 057 super( "KDC-REQ-BODY AddEType" ); 058 } 059 060 061 /** 062 * {@inheritDoc} 063 */ 064 public void action( KdcReqBodyContainer kdcReqBodyContainer ) throws DecoderException 065 { 066 TLV tlv = kdcReqBodyContainer.getCurrentTLV(); 067 068 // The Length can't be null 069 if ( tlv.getLength() == 0 ) 070 { 071 LOG.error( I18n.err( I18n.ERR_01308_ZERO_LENGTH_TLV ) ); 072 073 // This will generate a PROTOCOL_ERROR 074 throw new DecoderException( I18n.err( I18n.ERR_01309_EMPTY_TLV ) ); 075 } 076 077 KdcReqBody kdcReqBody = kdcReqBodyContainer.getKdcReqBody(); 078 079 BerValue value = tlv.getValue(); 080 081 try 082 { 083 int etype = IntegerDecoder.parse( value ); 084 EncryptionType encryptionType = EncryptionType.getTypeByValue( etype ); 085 086 kdcReqBody.addEType( encryptionType ); 087 088 if ( IS_DEBUG ) 089 { 090 LOG.debug( "EncryptionType : {}", encryptionType ); 091 } 092 } 093 catch ( IntegerDecoderException ide ) 094 { 095 LOG.error( I18n.err( I18n.ERR_01310_INTEGER_DECODING_ERROR, Strings.dumpBytes( value.getData() ) ) ); 096 097 // This will generate a PROTOCOL_ERROR 098 throw new DecoderException( ide.getMessage() ); 099 } 100 101 kdcReqBodyContainer.setGrammarEndAllowed( true ); 102 } 103}