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.value.EncryptionKey; 027 import org.apache.directory.shared.asn1.der.ASN1OutputStream; 028 import org.apache.directory.shared.asn1.der.DERInteger; 029 import org.apache.directory.shared.asn1.der.DEROctetString; 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 EncryptionKeyEncoder 039 { 040 /** 041 * Encodes an {@link EncryptionKey} into a byte array. 042 * 043 * @param key 044 * @return The byte array. 045 * @throws IOException 046 */ 047 public static byte[] encode( EncryptionKey key ) throws IOException 048 { 049 ByteArrayOutputStream baos = new ByteArrayOutputStream(); 050 ASN1OutputStream aos = new ASN1OutputStream( baos ); 051 052 aos.writeObject( encodeSequence( key ) ); 053 aos.close(); 054 055 return baos.toByteArray(); 056 } 057 058 059 protected static DERSequence encodeSequence( EncryptionKey key ) 060 { 061 DERSequence vector = new DERSequence(); 062 063 vector.add( new DERTaggedObject( 0, DERInteger.valueOf( key.getKeyType().getOrdinal() ) ) ); 064 vector.add( new DERTaggedObject( 1, new DEROctetString( key.getKeyValue() ) ) ); 065 066 return vector; 067 } 068 }