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-/*
- *
- * 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.
- *
- */
-
-using System;
-using System.Collections;
-using System.Configuration;
-using System.Text;
-using Apache.Qpid.Sasl;
-using Apache.Qpid.Sasl.Mechanisms;
-
-using Apache.Qpid.Client.Configuration;
-
-namespace Apache.Qpid.Client.Security
-{
-
- /// <summary>
- /// Helper class to map SASL mechanisms to our
- /// internal ISaslCallbackHandler implementations.
- /// </summary>
- /// <remarks>
- /// The set of configured callback handlers and their order
- /// controls the selection of the SASL mechanism used for authentication.
- /// <para>
- /// You can either replace the default handler for CRAM-MD5 and PLAIN
- /// authentication (the two default options) using the application
- /// configuration file. Configuration is done by especifying the SASL
- /// mechanism name (e.g PLAIN) and the type implementing the callback handler
- /// used to provide any data required by the mechanism like username and password.
- /// </para>
- /// <para>
- /// Callback handler types should implement the IAMQCallbackHandler interface.
- /// </para>
- /// <para>
- /// New callbacks or authentication mechanisms can be configured like this:
- /// </para>
- /// <example><![CDATA[
- /// <configuration>
- /// <configSections>
- /// <sectionGroup name="qpid.client">
- /// <section name="authentication" type="Apache.Qpid.Client.Configuration.AuthenticationConfigurationSectionHandler, Apache.Qpid.Client"/>
- /// </sectionGroup>
- /// </configSections>
- /// <qpid.client>
- /// <authentication>
- /// <add key="TEST" value="Apache.Qpid.Client.Tests.Security.TestCallbackHandler, Apache.Qpid.Client.Tests"/>
- /// </authentication>
- /// </qpid.client>
- /// </configuration>
- /// ]]></example>
- /// </remarks>
- public sealed class CallbackHandlerRegistry
- {
- private static CallbackHandlerRegistry _instance =
- new CallbackHandlerRegistry();
- private OrderedHashTable _mechanism2HandlerMap;
- private string[] _mechanisms;
-
- public static CallbackHandlerRegistry Instance
- {
- get { return _instance; }
- }
-
- public string[] Mechanisms
- {
- get { return _mechanisms; }
- }
-
- private CallbackHandlerRegistry()
- {
- _mechanism2HandlerMap = (OrderedHashTable)
- ConfigurationSettings.GetConfig("qpid.client/authentication");
-
- // configure default options if not available
- if ( _mechanism2HandlerMap == null )
- _mechanism2HandlerMap = new OrderedHashTable();
-
- if ( !_mechanism2HandlerMap.Contains(ExternalSaslClient.Mechanism) )
- _mechanism2HandlerMap.Add(ExternalSaslClient.Mechanism, typeof(UsernamePasswordCallbackHandler));
- if ( !_mechanism2HandlerMap.Contains(CramMD5SaslClient.Mechanism) )
- _mechanism2HandlerMap.Add(CramMD5SaslClient.Mechanism, typeof(UsernamePasswordCallbackHandler));
- if ( !_mechanism2HandlerMap.Contains(PlainSaslClient.Mechanism) )
- _mechanism2HandlerMap.Add(PlainSaslClient.Mechanism, typeof(UsernamePasswordCallbackHandler));
-
- _mechanisms = new string[_mechanism2HandlerMap.Count];
- _mechanism2HandlerMap.OrderedKeys.CopyTo(_mechanisms, 0);
- }
-
- public bool IsSupportedMechanism(string mechanism)
- {
- return _mechanism2HandlerMap.Contains(mechanism);
- }
-
- public string ChooseMechanism(string mechanisms)
- {
- IList mechs = mechanisms.Split(' ');
- foreach ( string supportedMech in _mechanisms )
- {
- if ( mechs.Contains(supportedMech) )
- return supportedMech;
- }
- return null;
- }
-
- public Type GetCallbackHandler(string mechanism)
- {
- return (Type)_mechanism2HandlerMap[mechanism];
- }
- }
-}