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.jaas;
  
  import java.io.IOException;
  import java.security.cert.X509Certificate;
  
  import javax.security.auth.callback.Callback;
  import javax.security.auth.callback.CallbackHandler;
  import javax.security.auth.callback.UnsupportedCallbackException;
  
  /**
   * A Standard JAAS callback handler for SSL certificate requests. Will only
   * handle callbacks of type CertificateCallback.
   *
   * @author sepandm@gmail.com (Sepand)
   */
  public class JaasCertificateCallbackHandler implements CallbackHandler {
      final X509Certificate certificates[];
  
      /**
       * Basic constructor.
       *
       * @param certs The certificate returned when calling back.
       */
      public JaasCertificateCallbackHandler(X509Certificate certs[]) {
          certificates = certs;
      }
  
      /**
       * Overriding handle method to handle certificates.
       *
       * @param callbacks The callbacks requested.
       * @throws IOException
       * @throws UnsupportedCallbackException Thrown if an unkown Callback type is
       *                 encountered.
       */
      @Override
      public void handle(Callback[] callbacks) throws IOException, UnsupportedCallbackException {
          for (int i = 0; i < callbacks.length; i++) {
              Callback callback = callbacks[i];
              if (callback instanceof CertificateCallback) {
                  CertificateCallback certCallback = (CertificateCallback)callback;
  
                  certCallback.setCertificates(certificates);
  
              } else {
                  throw new UnsupportedCallbackException(callback);
              }
          }
      }
  }
  