| /* |
| * 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.messages.value; |
| |
| |
| import java.nio.BufferOverflowException; |
| import java.nio.ByteBuffer; |
| |
| import org.apache.directory.server.kerberos.shared.messages.value.types.TransitedEncodingType; |
| import org.apache.directory.shared.asn1.AbstractAsn1Object; |
| import org.apache.directory.shared.asn1.ber.tlv.TLV; |
| import org.apache.directory.shared.asn1.ber.tlv.UniversalTag; |
| import org.apache.directory.shared.asn1.ber.tlv.Value; |
| import org.apache.directory.shared.asn1.codec.EncoderException; |
| import org.apache.directory.shared.ldap.util.StringTools; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| |
| /** |
| * The TransitedEncoding structure. |
| * |
| * The ASN.1 grammar is : |
| * |
| * -- encoded Transited field |
| * TransitedEncoding ::= SEQUENCE { |
| * tr-type [0] Int32 -- must be registered --, |
| * contents [1] OCTET STRING |
| * } |
| * |
| * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> |
| * @version $Rev$, $Date$ |
| */ |
| public class TransitedEncoding extends AbstractAsn1Object |
| { |
| /** The logger */ |
| private static final Logger log = LoggerFactory.getLogger( TransitedEncoding.class ); |
| |
| /** Speedup for logs */ |
| private static final boolean IS_DEBUG = log.isDebugEnabled(); |
| |
| /** The transited type. One of : |
| * NULL |
| * DOMAIN_X500_COMPRESS |
| */ |
| private TransitedEncodingType trType; |
| |
| /** The transited data */ |
| private byte[] contents; |
| |
| // Storage for computed lengths |
| private transient int trTypeLength; |
| private transient int contentsLength; |
| private transient int transitedEncodingLength; |
| |
| |
| /** |
| * Creates a new instance of TransitedEncoding. |
| */ |
| public TransitedEncoding() |
| { |
| trType = TransitedEncodingType.NULL; |
| contents = new byte[0]; |
| } |
| |
| |
| /** |
| * Creates a new instance of TransitedEncoding. |
| * |
| * @param trType |
| * @param contents |
| */ |
| public TransitedEncoding( TransitedEncodingType trType, byte[] contents ) |
| { |
| this.trType = trType; |
| this.contents = contents; |
| } |
| |
| |
| /** |
| * Returns the contents. |
| * |
| * @return The contents. |
| */ |
| public byte[] getContents() |
| { |
| return contents; |
| } |
| |
| |
| /** |
| * Set the contents |
| * @param contents The contents |
| */ |
| public void setContents( byte[] contents ) |
| { |
| this.contents = contents; |
| } |
| |
| |
| /** |
| * Returns the {@link TransitedEncodingType}. |
| * |
| * @return The {@link TransitedEncodingType}. |
| */ |
| public TransitedEncodingType getTrType() |
| { |
| return trType; |
| } |
| |
| |
| /** |
| * Set the transited encoding type |
| * @param trType The transited encoding type |
| */ |
| public void setTrType( TransitedEncodingType trType ) |
| { |
| this.trType = trType; |
| } |
| |
| |
| /** |
| * Compute the TransitedEncoding length |
| * |
| * TransitedEncoding : |
| * |
| * 0x30 L1 TransitedEncoding |
| * | |
| * +--> 0xA0 L2 trType tag |
| * | | |
| * | +--> 0x02 L2-1 trType (int) |
| * | |
| * +--> 0xA1 L3 contents tag |
| * | |
| * +--> 0x04 L3-1 contents (OCTET STRING) |
| * |
| * where L1 = L2 + lenght(0xA0) + length(L2) + |
| * L3 + lenght(0xA1) + length(L3) |
| * and |
| * L2 = L2-1 + length(0x02) + length( L2-1) |
| * L3 = L3-1 + length(0x04) + length( L3-1) |
| */ |
| public int computeLength() |
| { |
| // Compute the trType. The Length will always be contained in 1 byte |
| trTypeLength = 1 + 1 + Value.getNbBytes( trType.getOrdinal() ); |
| transitedEncodingLength = 1 + TLV.getNbBytes( trTypeLength ) + trTypeLength; |
| |
| // Compute the keyValue |
| if ( contents == null ) |
| { |
| contentsLength = 1 + 1; |
| } |
| else |
| { |
| contentsLength = 1 + TLV.getNbBytes( contents.length ) + contents.length; |
| } |
| |
| transitedEncodingLength += 1 + TLV.getNbBytes( contentsLength ) + contentsLength; |
| |
| // Compute the whole sequence length |
| int transitedEncodingSeqLength = 1 + Value.getNbBytes( transitedEncodingLength ) + transitedEncodingLength; |
| |
| return transitedEncodingSeqLength; |
| |
| } |
| |
| |
| /** |
| * Encode the TransitedEncoding message to a PDU. |
| * |
| * TransitedEncoding : |
| * |
| * 0x30 LL |
| * 0xA0 LL |
| * 0x02 0x01 trType |
| * 0xA1 LL |
| * 0x04 LL adData |
| * |
| * @param buffer The buffer where to put the PDU. It should have been allocated |
| * before, with the right size. |
| * @return The constructed PDU. |
| */ |
| public ByteBuffer encode( ByteBuffer buffer ) throws EncoderException |
| { |
| if ( buffer == null ) |
| { |
| throw new EncoderException( "Cannot put a PDU in a null buffer !" ); |
| } |
| |
| try |
| { |
| // The AuthorizationDataEntry SEQ Tag |
| buffer.put( UniversalTag.SEQUENCE_TAG ); |
| buffer.put( TLV.getBytes( transitedEncodingLength ) ); |
| |
| // The tr-type, first the tag, then the value |
| buffer.put( ( byte ) 0xA0 ); |
| buffer.put( TLV.getBytes( trTypeLength ) ); |
| Value.encode( buffer, trType.getOrdinal() ); |
| |
| // The contents, first the tag, then the value |
| buffer.put( ( byte ) 0xA1 ); |
| buffer.put( TLV.getBytes( contentsLength ) ); |
| Value.encode( buffer, contents ); |
| } |
| catch ( BufferOverflowException boe ) |
| { |
| log.error( |
| "Cannot encode the TransitedEncoding object, the PDU size is {} when only {} bytes has been allocated", |
| 1 + TLV.getNbBytes( transitedEncodingLength ) + transitedEncodingLength, buffer.capacity() ); |
| throw new EncoderException( "The PDU buffer size is too small !" ); |
| } |
| |
| if ( IS_DEBUG ) |
| { |
| log.debug( "TransitedEncoding encoding : {}", StringTools.dumpBytes( buffer.array() ) ); |
| log.debug( "TransitedEncoding initial value : {}", toString() ); |
| } |
| |
| return buffer; |
| } |
| |
| |
| /** |
| * @see Object#toString() |
| */ |
| public String toString() |
| { |
| StringBuilder sb = new StringBuilder(); |
| |
| sb.append( "TransitedEncoding : {\n" ); |
| sb.append( " tr-type: " ).append( trType ).append( '\n' ); |
| |
| sb.append( " contents: " ).append( StringTools.dumpBytes( contents ) ).append( "\n}\n" ); |
| |
| return sb.toString(); |
| } |
| } |