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 package org.apache.directory.server.kerberos.shared.io.decoder; 021 022 023 import java.util.Enumeration; 024 025 import org.apache.directory.server.kerberos.shared.messages.value.KerberosTime; 026 import org.apache.directory.server.kerberos.shared.messages.value.LastRequest; 027 import org.apache.directory.server.kerberos.shared.messages.value.LastRequestEntry; 028 import org.apache.directory.server.kerberos.shared.messages.value.LastRequestType; 029 import org.apache.directory.shared.asn1.der.DEREncodable; 030 import org.apache.directory.shared.asn1.der.DERGeneralizedTime; 031 import org.apache.directory.shared.asn1.der.DERInteger; 032 import org.apache.directory.shared.asn1.der.DERSequence; 033 import org.apache.directory.shared.asn1.der.DERTaggedObject; 034 035 036 /** 037 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> 038 * @version $Rev: 589780 $, $Date: 2007-10-29 19:14:59 +0100 (Mon, 29 Oct 2007) $ 039 */ 040 public class LastRequestDecoder 041 { 042 /** 043 * LastReq ::= SEQUENCE OF SEQUENCE { 044 * lr-type[0] INTEGER, 045 * lr-value[1] KerberosTime 046 * } 047 */ 048 protected static LastRequest decodeSequence( DERSequence sequence ) 049 { 050 LastRequestEntry[] entries = new LastRequestEntry[sequence.size()]; 051 052 int ii = 0; 053 for ( Enumeration<DEREncodable> e = sequence.getObjects(); e.hasMoreElements(); ) 054 { 055 DERSequence object = ( DERSequence ) e.nextElement(); 056 LastRequestEntry entry = decode( object ); 057 entries[ii] = entry; 058 ii++; 059 } 060 061 return new LastRequest( entries ); 062 } 063 064 065 protected static LastRequestEntry decode( DERSequence sequence ) 066 { 067 LastRequestType type = LastRequestType.NONE; 068 KerberosTime value = null; 069 070 for ( Enumeration<DEREncodable> e = sequence.getObjects(); e.hasMoreElements(); ) 071 { 072 DERTaggedObject object = ( DERTaggedObject ) e.nextElement(); 073 int tag = object.getTagNo(); 074 DEREncodable derObject = object.getObject(); 075 076 switch ( tag ) 077 { 078 case 0: 079 DERInteger tag0 = ( DERInteger ) derObject; 080 type = LastRequestType.getTypeByOrdinal( tag0.intValue() ); 081 break; 082 case 1: 083 DERGeneralizedTime tag1 = ( DERGeneralizedTime ) derObject; 084 value = KerberosTimeDecoder.decode( tag1 ); 085 break; 086 } 087 } 088 089 return new LastRequestEntry( type, value ); 090 } 091 }