001 /*
002 *
003 * Licensed to the Apache Software Foundation (ASF) under one
004 * or more contributor license agreements. See the NOTICE file
005 * distributed with this work for additional information
006 * regarding copyright ownership. The ASF licenses this file
007 * to you under the Apache License, Version 2.0 (the
008 * "License"); you may not use this file except in compliance
009 * with the License. You may obtain a copy of the License at
010 *
011 * http://www.apache.org/licenses/LICENSE-2.0
012 *
013 * Unless required by applicable law or agreed to in writing,
014 * software distributed under the License is distributed on an
015 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
016 * KIND, either express or implied. See the License for the
017 * specific language governing permissions and limitations
018 * under the License.
019 *
020 */
021 package org.apache.qpid.client.security;
022
023 import org.apache.qpid.client.protocol.AMQProtocolSession;
024
025 import org.slf4j.Logger;
026 import org.slf4j.LoggerFactory;
027
028 import javax.security.auth.callback.Callback;
029 import javax.security.auth.callback.NameCallback;
030 import javax.security.auth.callback.PasswordCallback;
031 import javax.security.auth.callback.UnsupportedCallbackException;
032
033 import java.io.IOException;
034 import java.io.UnsupportedEncodingException;
035 import java.security.MessageDigest;
036 import java.security.NoSuchAlgorithmException;
037
038 public class UsernameHashedPasswordCallbackHandler implements AMQCallbackHandler
039 {
040 private static final Logger _logger = LoggerFactory.getLogger(UsernameHashedPasswordCallbackHandler.class);
041
042 private AMQProtocolSession _protocolSession;
043
044 public void initialise(AMQProtocolSession protocolSession)
045 {
046 _protocolSession = protocolSession;
047 }
048
049 public void handle(Callback[] callbacks) throws IOException, UnsupportedCallbackException
050 {
051 for (int i = 0; i < callbacks.length; i++)
052 {
053 Callback cb = callbacks[i];
054 if (cb instanceof NameCallback)
055 {
056 ((NameCallback) cb).setName(_protocolSession.getUsername());
057 }
058 else if (cb instanceof PasswordCallback)
059 {
060 try
061 {
062 ((PasswordCallback) cb).setPassword(getHash(_protocolSession.getPassword()));
063 }
064 catch (NoSuchAlgorithmException e)
065 {
066 UnsupportedCallbackException uce = new UnsupportedCallbackException(cb);
067 uce.initCause(e);
068 throw uce;
069 }
070 }
071 else
072 {
073 throw new UnsupportedCallbackException(cb);
074 }
075 }
076 }
077
078 private char[] getHash(String text) throws NoSuchAlgorithmException, UnsupportedEncodingException
079 {
080
081 byte[] data = text.getBytes("utf-8");
082
083 MessageDigest md = MessageDigest.getInstance("MD5");
084
085 for (byte b : data)
086 {
087 md.update(b);
088 }
089
090 byte[] digest = md.digest();
091
092 char[] hash = new char[digest.length];
093
094 int index = 0;
095 for (byte b : digest)
096 {
097 hash[index++] = (char) b;
098 }
099
100 return hash;
101 }
102 }
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