001 /* 002 * Licensed to the Apache Software Foundation (ASF) under one 003 * or more contributor license agreements. See the NOTICE file 004 * distributed with this work for additional information 005 * regarding copyright ownership. The ASF licenses this file 006 * to you under the Apache License, Version 2.0 (the 007 * "License"); you may not use this file except in compliance 008 * with the License. You may obtain a copy of the License at 009 * 010 * http://www.apache.org/licenses/LICENSE-2.0 011 * 012 * Unless required by applicable law or agreed to in writing, 013 * software distributed under the License is distributed on an 014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 015 * KIND, either express or implied. See the License for the 016 * specific language governing permissions and limitations 017 * under the License. 018 * 019 */ 020 package org.apache.directory.server.changepw.io; 021 022 023 import java.io.IOException; 024 import java.nio.ByteBuffer; 025 026 import org.apache.directory.server.changepw.messages.ChangePasswordError; 027 import org.apache.directory.server.changepw.messages.ChangePasswordErrorModifier; 028 import org.apache.directory.server.kerberos.shared.io.decoder.ErrorMessageDecoder; 029 import org.apache.directory.server.kerberos.shared.messages.ErrorMessage; 030 031 032 /** 033 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> 034 * @version $Rev$, $Date$ 035 */ 036 public class ChangePasswordErrorDecoder 037 { 038 private static final int HEADER_LENGTH = 6; 039 040 041 /** 042 * Decodes a {@link ByteBuffer} into a {@link ChangePasswordError}. 043 * 044 * @param buf 045 * @return The {@link ChangePasswordError}. 046 * @throws IOException 047 */ 048 public ChangePasswordError decode( ByteBuffer buf ) throws IOException 049 { 050 ChangePasswordErrorModifier modifier = new ChangePasswordErrorModifier(); 051 052 short messageLength = buf.getShort(); 053 054 modifier.setProtocolVersionNumber( buf.getShort() ); 055 056 // AP_REQ length will be 0 for error messages 057 buf.getShort(); // authHeader length 058 059 int errorLength = messageLength - HEADER_LENGTH; 060 061 byte[] errorBytes = new byte[errorLength]; 062 063 buf.get( errorBytes ); 064 ByteBuffer errorBuffer = ByteBuffer.wrap( errorBytes ); 065 066 ErrorMessageDecoder errorDecoder = new ErrorMessageDecoder(); 067 ErrorMessage errorMessage = errorDecoder.decode( errorBuffer ); 068 069 modifier.setErrorMessage( errorMessage ); 070 071 return modifier.getChangePasswordError(); 072 } 073 }