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.encoder;
021
022
023 import java.io.ByteArrayOutputStream;
024 import java.io.IOException;
025
026 import org.apache.directory.server.kerberos.shared.messages.Encodable;
027 import org.apache.directory.server.kerberos.shared.messages.value.EncryptedTimeStamp;
028 import org.apache.directory.shared.asn1.der.ASN1OutputStream;
029 import org.apache.directory.shared.asn1.der.DERInteger;
030 import org.apache.directory.shared.asn1.der.DERSequence;
031 import org.apache.directory.shared.asn1.der.DERTaggedObject;
032
033
034 /**
035 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
036 * @version $Rev: 540371 $, $Date: 2007-05-22 03:00:43 +0300 (Tue, 22 May 2007) $
037 */
038 public class EncryptedTimestampEncoder implements Encoder, EncoderFactory
039 {
040 public byte[] encode( Encodable encryptedTimestamp ) throws IOException
041 {
042 ByteArrayOutputStream baos = new ByteArrayOutputStream();
043 ASN1OutputStream aos = new ASN1OutputStream( baos );
044
045 aos.writeObject( encodeTimestamp( ( EncryptedTimeStamp ) encryptedTimestamp ) );
046 aos.close();
047
048 return baos.toByteArray();
049 }
050
051
052 public Encoder getEncoder()
053 {
054 return new EncryptedTimestampEncoder();
055 }
056
057
058 /**
059 * PA-ENC-TS-ENC ::= SEQUENCE {
060 * patimestamp[0] KerberosTime, -- client's time
061 * pausec[1] INTEGER OPTIONAL
062 * }
063 */
064 private DERSequence encodeTimestamp( EncryptedTimeStamp encryptedTimestamp )
065 {
066 DERSequence sequence = new DERSequence();
067
068 sequence.add( new DERTaggedObject( 0, KerberosTimeEncoder.encode( encryptedTimestamp.getTimeStamp() ) ) );
069
070 if ( encryptedTimestamp.getMicroSeconds() > 0 )
071 {
072 sequence.add( new DERTaggedObject( 1, DERInteger.valueOf( encryptedTimestamp.getMicroSeconds() ) ) );
073 }
074
075 return sequence;
076 }
077 }