| /* |
| * 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.components; |
| |
| |
| import java.nio.BufferOverflowException; |
| import java.nio.ByteBuffer; |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| import org.apache.directory.api.asn1.Asn1Object; |
| import org.apache.directory.api.asn1.EncoderException; |
| 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.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| |
| /** |
| * Store a list of METHOD-DATA |
| * |
| * The ASN.1 grammar is : |
| * <pre> |
| * METHOD-DATA ::= SEQUENCE OF <PA-DATA> |
| * </pre> |
| * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> |
| */ |
| public class MethodData implements Asn1Object |
| { |
| /** The logger */ |
| private static final Logger LOG = LoggerFactory.getLogger( MethodData.class ); |
| |
| /** Speedup for logs */ |
| private static final boolean IS_DEBUG = LOG.isDebugEnabled(); |
| |
| /** List of all PA-DATA stored */ |
| private List<PaData> paDatas; |
| |
| // Storage for computed lengths |
| private int methodDataLength; |
| |
| |
| /** |
| * Creates a new instance of MethodData. |
| */ |
| public MethodData() |
| { |
| this.paDatas = new ArrayList<>(); |
| } |
| |
| |
| /** |
| * Adds an {@link PaData} to the list |
| * @param paData The PaData to add |
| */ |
| public void addPaData( PaData paData ) |
| { |
| paDatas.add( paData ); |
| } |
| |
| |
| /** |
| * Returns true if this {@link PaData} contains a specified {@link PaData}. |
| * |
| * @param paData The paData we are looking for in the existing list |
| * @return true if this {@link PaData} contains a specified {@link PaData}. |
| */ |
| public boolean contains( PaData paData ) |
| { |
| if ( paDatas != null ) |
| { |
| return paDatas.contains( paData ); |
| } |
| |
| return false; |
| } |
| |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override |
| public int hashCode() |
| { |
| int hash = 37; |
| |
| if ( paDatas != null ) |
| { |
| hash = hash * 17 + paDatas.size(); |
| |
| for ( PaData paData : paDatas ) |
| { |
| hash = hash * 17 + paData.hashCode(); |
| } |
| } |
| |
| return hash; |
| } |
| |
| |
| /** |
| * Returns true if two {@link MethodData} are equal. |
| * |
| * @param that The {@link MethodData} we want to compare with the current one |
| * @return true if two {@link MethodData} are equal. |
| */ |
| public boolean equals( MethodData that ) |
| { |
| if ( that == null ) |
| { |
| return false; |
| } |
| |
| // infoEntries can't be null after creation |
| if ( paDatas.size() != that.paDatas.size() ) |
| { |
| return false; |
| } |
| |
| for ( int i = 0; i < paDatas.size(); i++ ) |
| { |
| if ( !paDatas.get( i ).equals( that.paDatas.get( i ) ) ) |
| { |
| return false; |
| } |
| } |
| |
| return true; |
| } |
| |
| |
| /** |
| * Returns the contained {@link PaData}s as an array. |
| * |
| * @return An array of {@link PaData}s. |
| */ |
| public PaData[] getPaDatas() |
| { |
| return paDatas.toArray( new PaData[0] ); |
| } |
| |
| |
| /** |
| * Compute the METHOD-DATA length |
| * <pre> |
| * METHOD-DATA : |
| * |
| * 0x30 L1 METHOD-DATA sequence of PA-DATA |
| * | |
| * +--> 0x30 L2[1] PA-DATA[1] |
| * | |
| * +--> 0x30 L2[2] PA-DATA[2] |
| * | |
| * ... |
| * | |
| * +--> 0x30 L2[n] PA-DATA[n] |
| * |
| * where L1 = sum( L2[1], l2[2], ..., L2[n] ) |
| * </pre> |
| */ |
| public int computeLength() |
| { |
| // Compute the PA-DATA length. |
| methodDataLength = 0; |
| |
| if ( ( paDatas != null ) && !paDatas.isEmpty() ) |
| { |
| for ( PaData paData : paDatas ) |
| { |
| int length = paData.computeLength(); |
| methodDataLength += length; |
| } |
| } |
| |
| return 1 + TLV.getNbBytes( methodDataLength ) + methodDataLength; |
| } |
| |
| |
| /** |
| * Encode the METHOD-DATA message to a PDU. |
| * <pre> |
| * METHOD-DATA : |
| * |
| * 0x30 LL |
| * 0x30 LL PA-DATA[1] |
| * 0x30 LL PA-DATA[1] |
| * ... |
| * 0x30 LL PA-DATA[1] |
| * </pre> |
| * @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( I18n.err( I18n.ERR_148 ) ); |
| } |
| |
| try |
| { |
| // The METHOD-DATA SEQ Tag |
| buffer.put( UniversalTag.SEQUENCE.getValue() ); |
| buffer.put( TLV.getBytes( methodDataLength ) ); |
| |
| // The PA-DATA list, if it's not empty |
| if ( ( paDatas != null ) && !paDatas.isEmpty() ) |
| { |
| for ( PaData paData : paDatas ) |
| { |
| paData.encode( buffer ); |
| } |
| } |
| } |
| catch ( BufferOverflowException boe ) |
| { |
| LOG.error( I18n.err( I18n.ERR_144, 1 + TLV.getNbBytes( methodDataLength ) |
| + methodDataLength, buffer.capacity() ) ); |
| throw new EncoderException( I18n.err( I18n.ERR_138 ), boe ); |
| } |
| |
| if ( IS_DEBUG ) |
| { |
| LOG.debug( "METHOD-DATA encoding : {}", Strings.dumpBytes( buffer.array() ) ); |
| LOG.debug( "METHOD-DATA initial value : {}", this ); |
| } |
| |
| return buffer; |
| } |
| |
| |
| /** |
| * @see Object#toString() |
| */ |
| public String toString() |
| { |
| StringBuilder sb = new StringBuilder(); |
| boolean isFirst = true; |
| |
| sb.append( "METHOD-DATA : " ); |
| |
| for ( PaData paData : paDatas ) |
| { |
| if ( isFirst ) |
| { |
| isFirst = false; |
| } |
| else |
| { |
| sb.append( ", " ); |
| } |
| |
| sb.append( paData.toString() ); |
| } |
| |
| return sb.toString(); |
| } |
| } |