| /* |
| * 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.BufferOverflowException; |
| import java.nio.ByteBuffer; |
| |
| import org.apache.directory.api.asn1.EncoderException; |
| import org.apache.directory.api.asn1.ber.tlv.BerValue; |
| import org.apache.directory.api.asn1.ber.tlv.TLV; |
| import org.apache.directory.api.asn1.ber.tlv.UniversalTag; |
| import org.apache.directory.api.util.Strings; |
| import org.apache.directory.server.i18n.I18n; |
| import org.apache.directory.shared.kerberos.KerberosConstants; |
| import org.apache.directory.shared.kerberos.KerberosMessageType; |
| import org.apache.directory.shared.kerberos.components.EncryptedData; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| |
| /** |
| * AP-REP message. |
| * It will store the object described by the ASN.1 grammar : |
| * <pre> |
| * AP-REP ::= [APPLICATION 15] SEQUENCE { |
| * pvno [0] INTEGER (5), |
| * msg-type [1] INTEGER (15), |
| * enc-part [2] <EncryptedData> -- EncAPRepPart |
| * } |
| * </pre> |
| * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> |
| */ |
| public class ApRep extends KerberosMessage |
| { |
| /** The logger */ |
| private static final Logger LOG = LoggerFactory.getLogger( ApRep.class ); |
| |
| /** Speedup for logs */ |
| private static final boolean IS_DEBUG = LOG.isDebugEnabled(); |
| |
| /** The encryptedData, an encrypted EncAPRepPart */ |
| private EncryptedData encPart; |
| |
| // Storage for computed lengths |
| private int pvnoLength; |
| private int msgTypeLength; |
| private int encPartLength; |
| private int apRepLength; |
| private int apRepSeqLength; |
| |
| |
| /** |
| * Creates a new instance of AP-REP. |
| */ |
| public ApRep() |
| { |
| super( KerberosMessageType.AP_REP ); |
| } |
| |
| |
| /** |
| * Returns the {@link EncryptedData}. |
| * |
| * @return The {@link EncryptedData}. |
| */ |
| public EncryptedData getEncPart() |
| { |
| return encPart; |
| } |
| |
| |
| /** |
| * Sets the {@link EncryptedData}. |
| * |
| * @param encPart The encrypted part |
| */ |
| public void setEncPart( EncryptedData encPart ) |
| { |
| this.encPart = encPart; |
| } |
| |
| |
| /** |
| * Compute the AP-REP length |
| * <pre> |
| * AP-REP : |
| * |
| * 0x6F L1 AP-REP message |
| * | |
| * +--> 0x30 L2 |
| * | |
| * +--> 0xA0 0x03 |
| * | | |
| * | +--> 0x02 0x01 0x05 pvno |
| * | |
| * +--> 0xA1 0x03 |
| * | | |
| * | +--> 0x02 0x01 0x0E msg-type |
| * | |
| * +--> 0xA2 L3 |
| * | |
| * +--> 0x30 L3-1 enc-part |
| * |
| * </pre> |
| */ |
| public int computeLength() |
| { |
| // Compute the PVNO length. |
| pvnoLength = 1 + 1 + BerValue.getNbBytes( getProtocolVersionNumber() ); |
| |
| // Compute the msg-type length |
| msgTypeLength = 1 + 1 + BerValue.getNbBytes( getMessageType().getValue() ); |
| |
| // Compute the enc-part length |
| encPartLength = encPart.computeLength(); |
| |
| // Compute the sequence size |
| apRepLength = |
| 1 + TLV.getNbBytes( pvnoLength ) + pvnoLength + |
| 1 + TLV.getNbBytes( msgTypeLength ) + msgTypeLength + |
| 1 + TLV.getNbBytes( encPartLength ) + encPartLength; |
| |
| apRepSeqLength = 1 + TLV.getNbBytes( apRepLength ) + apRepLength; |
| |
| return 1 + TLV.getNbBytes( apRepSeqLength ) + apRepSeqLength; |
| } |
| |
| |
| /** |
| * Encode the AP-REP 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() ); |
| } |
| |
| try |
| { |
| // The AP-REP Tag |
| buffer.put( ( byte ) KerberosConstants.AP_REP_TAG ); |
| buffer.put( TLV.getBytes( apRepSeqLength ) ); |
| |
| // The AP-REP SEQ Tag |
| buffer.put( UniversalTag.SEQUENCE.getValue() ); |
| buffer.put( TLV.getBytes( apRepLength ) ); |
| |
| // The PVNO ------------------------------------------------------- |
| // The tag |
| buffer.put( ( byte ) KerberosConstants.AP_REP_PVNO_TAG ); |
| buffer.put( TLV.getBytes( pvnoLength ) ); |
| |
| // The value |
| BerValue.encode( buffer, getProtocolVersionNumber() ); |
| |
| // The msg-type --------------------------------------------------- |
| // The tag |
| buffer.put( ( byte ) KerberosConstants.AP_REP_MSG_TYPE_TAG ); |
| buffer.put( TLV.getBytes( msgTypeLength ) ); |
| |
| // The value |
| BerValue.encode( buffer, getMessageType().getValue() ); |
| |
| // The enc-part --------------------------------------------------- |
| // The tag |
| buffer.put( ( byte ) KerberosConstants.AP_REP_ENC_PART_TAG ); |
| buffer.put( TLV.getBytes( encPartLength ) ); |
| |
| // The value |
| encPart.encode( buffer ); |
| } |
| catch ( BufferOverflowException boe ) |
| { |
| LOG.error( I18n.err( I18n.ERR_137, 1 + TLV.getNbBytes( apRepLength ) + apRepLength, |
| buffer.capacity() ) ); |
| throw new EncoderException( I18n.err( I18n.ERR_138 ) ); |
| } |
| |
| if ( IS_DEBUG ) |
| { |
| LOG.debug( "AP-REP encoding : {}", Strings.dumpBytes( buffer.array() ) ); |
| LOG.debug( "AP-REP initial value : {}", toString() ); |
| } |
| |
| return buffer; |
| } |
| |
| |
| /** |
| * @see Object#toString() |
| */ |
| public String toString() |
| { |
| StringBuilder sb = new StringBuilder(); |
| |
| sb.append( "AP-REP :\n" ); |
| sb.append( " pvno : " ).append( getProtocolVersionNumber() ).append( "\n" ); |
| sb.append( " msg-type : " ).append( getMessageType() ).append( "\n" ); |
| sb.append( " enc-part : " ).append( encPart ).append( "\n" ); |
| |
| return sb.toString(); |
| } |
| } |