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 20:14:59 +0200 (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 }