content: /**
   * 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.
   */
  package org.apache.activemq.transport.amqp.sasl;
  
  import org.apache.qpid.proton.engine.Sasl;
  import org.fusesource.hawtbuf.Buffer;
  
  /**
   * Implements the SASL Plain mechanism.
   */
  public class PlainMechanism extends AbstractSaslMechanism {
  
      @Override
      public void processSaslStep(Sasl sasl) {
          byte[] data = new byte[sasl.pending()];
          sasl.recv(data, 0, data.length);
  
          Buffer[] parts = new Buffer(data).split((byte) 0);
          switch (parts.length) {
              case 0:
                  // Treat this as anonymous connect to support legacy behavior
                  // which allowed this.  Connection will fail if broker is not
                  // configured to allow anonymous connections.
                  break;
              case 2:
                  username = parts[0].utf8().toString();
                  password = parts[1].utf8().toString();
                  break;
              case 3:
                  username = parts[1].utf8().toString();
                  password = parts[2].utf8().toString();
                  break;
              default:
                  setFailed("Invalid encoding of Authentication credentials");
                  break;
          }
      }
  
      @Override
      public String getMechanismName() {
          return "PLAIN";
      }
  }
  