1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one
3 * or more contributor license agreements. See the NOTICE file
4 * distributed with this work for additional information
5 * regarding copyright ownership. The ASF licenses this file
6 * to you under the Apache License, Version 2.0 (the
7 * "License"); you may not use this file except in compliance
8 * with the License. You may obtain a copy of the License at
9 *
10 * http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing,
13 * software distributed under the License is distributed on an
14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15 * KIND, either express or implied. See the License for the
16 * specific language governing permissions and limitations
17 * under the License.
18 *
19 */
20 package org.apache.directory.server.changepw.io;
21
22
23 import java.io.IOException;
24 import java.nio.ByteBuffer;
25
26 import org.apache.directory.server.changepw.messages.ChangePasswordError;
27 import org.apache.directory.server.changepw.messages.ChangePasswordErrorModifier;
28 import org.apache.directory.server.kerberos.shared.io.decoder.ErrorMessageDecoder;
29 import org.apache.directory.server.kerberos.shared.messages.ErrorMessage;
30
31
32 /**
33 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
34 * @version $Rev$, $Date$
35 */
36 public class ChangePasswordErrorDecoder
37 {
38 private static final int HEADER_LENGTH = 6;
39
40
41 /**
42 * Decodes a {@link ByteBuffer} into a {@link ChangePasswordError}.
43 *
44 * @param buf
45 * @return The {@link ChangePasswordError}.
46 * @throws IOException
47 */
48 public ChangePasswordError decode( ByteBuffer buf ) throws IOException
49 {
50 ChangePasswordErrorModifier modifier = new ChangePasswordErrorModifier();
51
52 short messageLength = buf.getShort();
53
54 modifier.setProtocolVersionNumber( buf.getShort() );
55
56 // AP_REQ length will be 0 for error messages
57 buf.getShort(); // authHeader length
58
59 int errorLength = messageLength - HEADER_LENGTH;
60
61 byte[] errorBytes = new byte[errorLength];
62
63 buf.get( errorBytes );
64 ByteBuffer errorBuffer = ByteBuffer.wrap( errorBytes );
65
66 ErrorMessageDecoder errorDecoder = new ErrorMessageDecoder();
67 ErrorMessage errorMessage = errorDecoder.decode( errorBuffer );
68
69 modifier.setErrorMessage( errorMessage );
70
71 return modifier.getChangePasswordError();
72 }
73 }