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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.Text;

namespace Apache.Qpid.Sasl.Mechanisms
{
   /// <summary>
   /// Implements the ANONYMOUS authentication mechanism
   /// as outlined in RFC 2245
   /// </summary>
   public class AnonymousSaslClient : SaslClient
   {
      public const string Mechanism = "ANONYMOUS";

      public AnonymousSaslClient(
         string authid, IDictionary properties, 
         ISaslCallbackHandler handler)
         : base(authid, null, null, properties, handler)
      {
      }

      #region ISaslClient Implementation
      //
      // ISaslClient Implementation
      //

      public override string MechanismName
      {
         get { return Mechanism; }
      }

      public override bool HasInitialResponse
      {
         get { return true; }
      }

      public override byte[] EvaluateChallenge(byte[] challenge)
      {
         // ignore challenge
         SetComplete();
         return Encoding.UTF8.GetBytes(AuthorizationId);
      }

      #endregion // ISaslClient Implementation

   } // class AnonymousSaslClient

} // namespace Apache.Qpid.Sasl.Mechanisms