| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| * |
| */ |
| package org.apache.directory.server.kerberos.shared.io.encoder; |
| |
| |
| import java.io.ByteArrayOutputStream; |
| import java.io.IOException; |
| |
| import org.apache.directory.server.kerberos.shared.messages.value.EncryptedData; |
| import org.apache.directory.shared.asn1.der.ASN1OutputStream; |
| import org.apache.directory.shared.asn1.der.DERInteger; |
| import org.apache.directory.shared.asn1.der.DEROctetString; |
| import org.apache.directory.shared.asn1.der.DERSequence; |
| import org.apache.directory.shared.asn1.der.DERTaggedObject; |
| |
| |
| /** |
| * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> |
| * @version $Rev$, $Date$ |
| */ |
| public class EncryptedDataEncoder |
| { |
| /** |
| * Encodes an {@link EncryptedData} into a byte array. |
| * |
| * @param encryptedData |
| * @return The byte array. |
| * @throws IOException |
| */ |
| public static byte[] encode( EncryptedData encryptedData ) throws IOException |
| { |
| ByteArrayOutputStream baos = new ByteArrayOutputStream(); |
| ASN1OutputStream aos = new ASN1OutputStream( baos ); |
| |
| aos.writeObject( encodeSequence( encryptedData ) ); |
| aos.close(); |
| |
| return baos.toByteArray(); |
| } |
| |
| |
| /** |
| * Encodes an {@link EncryptedData} into a {@link DERSequence}. |
| * |
| * EncryptedData ::= SEQUENCE { |
| * etype[0] INTEGER, -- EncryptionEngine |
| * kvno[1] INTEGER OPTIONAL, |
| * cipher[2] OCTET STRING -- ciphertext |
| * } |
| * |
| * @param encryptedData |
| * @return The {@link DERSequence}. |
| */ |
| public static DERSequence encodeSequence( EncryptedData encryptedData ) |
| { |
| DERSequence sequence = new DERSequence(); |
| |
| sequence.add( new DERTaggedObject( 0, DERInteger.valueOf( encryptedData.getEType().getOrdinal() ) ) ); |
| |
| if ( encryptedData.hasKvno() ) |
| { |
| sequence.add( new DERTaggedObject( 1, DERInteger.valueOf( encryptedData.getKvno() ) ) ); |
| } |
| |
| sequence.add( new DERTaggedObject( 2, new DEROctetString( encryptedData.getCipher() ) ) ); |
| |
| return sequence; |
| } |
| } |