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 */
020package org.apache.directory.shared.kerberos.codec;
021
022
023import java.io.IOException;
024import java.nio.ByteBuffer;
025
026import org.apache.directory.api.asn1.Asn1Object;
027import org.apache.directory.api.asn1.EncoderException;
028
029
030/**
031 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
032 */
033public class KerberosEncoder
034{
035    public static ByteBuffer encode( Asn1Object asn1Obj, boolean isTcp ) throws IOException
036    {
037        ByteBuffer kerberosMessage = null;
038
039        int responseLength = asn1Obj.computeLength();
040
041        int bufferLen = responseLength;
042
043        if ( isTcp )
044        {
045            bufferLen += 4;
046        }
047
048        kerberosMessage = ByteBuffer.allocate( bufferLen );
049
050        if ( isTcp )
051        {
052            kerberosMessage.putInt( responseLength );
053        }
054
055        try
056        {
057            asn1Obj.encode( kerberosMessage );
058
059            kerberosMessage.flip();
060
061            return kerberosMessage;
062        }
063        catch ( EncoderException e )
064        {
065            throw new IOException( e.getMessage() );
066        }
067    }
068}