| /* |
| * 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.shared.kerberos.messages; |
| |
| |
| import java.nio.ByteBuffer; |
| |
| import org.apache.directory.api.asn1.EncoderException; |
| import org.apache.directory.api.asn1.ber.tlv.TLV; |
| import org.apache.directory.shared.kerberos.KerberosConstants; |
| import org.apache.directory.shared.kerberos.KerberosMessageType; |
| import org.apache.directory.shared.kerberos.components.KdcReq; |
| |
| |
| /** |
| * AS-REQ message. It's just a KDC-REQ message with a message type set to 10. |
| * It will store the object described by the ASN.1 grammar : |
| * <pre> |
| * AS-REQ ::= [APPLICATION 10] <KDC-REQ> |
| * </pre> |
| * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> |
| */ |
| public class AsReq extends KdcReq |
| { |
| // Storage for computed lengths |
| private int kdcReqLength; |
| |
| |
| /** |
| * Creates a new instance of AS-REQ. |
| */ |
| public AsReq() |
| { |
| super( KerberosMessageType.AS_REQ ); |
| } |
| |
| |
| /** |
| * Compute the AS-REQ length |
| * <pre> |
| * AS-REQ : |
| * |
| * 0x6A L1 AS-REQ message |
| * | |
| * +--> 0x30 L2 KDC-REQ sequence |
| * </pre> |
| */ |
| public int computeLength() |
| { |
| kdcReqLength = super.computeLength(); |
| return 1 + TLV.getNbBytes( kdcReqLength ) + kdcReqLength; |
| } |
| |
| |
| /** |
| * Encode the AS-REQ component |
| * |
| * @param buffer The buffer containing the encoded result |
| * @return The encoded component |
| * @throws EncoderException If the encoding failed |
| */ |
| public ByteBuffer encode( ByteBuffer buffer ) throws EncoderException |
| { |
| if ( buffer == null ) |
| { |
| buffer = ByteBuffer.allocate( computeLength() ); |
| } |
| |
| // The AS-REQ SEQ Tag |
| buffer.put( ( byte ) KerberosConstants.AS_REQ_TAG ); |
| buffer.put( TLV.getBytes( kdcReqLength ) ); |
| |
| // The KDC-REQ -------------------------------------------------------- |
| super.encode( buffer ); |
| |
| return buffer; |
| } |
| } |