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 02:00:43 +0200 (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    }