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.changepw.io;
021
022
023 import java.io.ByteArrayOutputStream;
024 import java.io.IOException;
025 import java.nio.ByteBuffer;
026
027 import org.apache.directory.server.changepw.value.ChangePasswordData;
028 import org.apache.directory.server.kerberos.shared.io.encoder.PrincipalNameEncoder;
029 import org.apache.directory.shared.asn1.der.ASN1OutputStream;
030 import org.apache.directory.shared.asn1.der.DERGeneralString;
031 import org.apache.directory.shared.asn1.der.DEROctetString;
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 $Rev$, $Date$
039 */
040 public class ChangePasswordDataEncoder
041 {
042 /**
043 * Encodes a {@link ChangePasswordData} into a byte array.
044 *
045 * @param data
046 * @return The byte array.
047 * @throws IOException
048 */
049 public byte[] encode( ChangePasswordData data ) throws IOException
050 {
051 ByteArrayOutputStream baos = new ByteArrayOutputStream();
052 ASN1OutputStream aos = new ASN1OutputStream( baos );
053
054 DERSequence dataSequence = encodeDataSequence( data );
055 aos.writeObject( dataSequence );
056
057 aos.close();
058
059 return baos.toByteArray();
060 }
061
062
063 /**
064 * Encodes a {@link ChangePasswordData} into a {@link ByteBuffer}.
065 *
066 * @param data
067 * @param out
068 * @throws IOException
069 */
070 public void encode( ChangePasswordData data, ByteBuffer out ) throws IOException
071 {
072 ASN1OutputStream aos = new ASN1OutputStream( out );
073
074 DERSequence sequence = encodeDataSequence( data );
075 aos.writeObject( sequence );
076
077 aos.close();
078 }
079
080
081 private DERSequence encodeDataSequence( ChangePasswordData data )
082 {
083 DERSequence sequence = new DERSequence();
084 sequence.add( new DERTaggedObject( 0, new DEROctetString( data.getPassword() ) ) );
085
086 // OPTIONAL
087 if ( data.getPrincipalName() != null )
088 {
089 sequence.add( new DERTaggedObject( 1, PrincipalNameEncoder.encode( data.getPrincipalName() ) ) );
090 }
091
092 // OPTIONAL
093 if ( data.getRealm() != null )
094 {
095 sequence.add( new DERTaggedObject( 2, DERGeneralString.valueOf( data.getRealm() ) ) );
096 }
097
098 return sequence;
099 }
100 }