/*
*
* 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.qpid;
import java.io.UnsupportedEncodingException;
import java.util.HashSet;
import java.util.List;
import java.util.StringTokenizer;
import org.apache.qpid.security.AMQPCallbackHandler;
import org.apache.qpid.security.CallbackHandlerRegistry;
public class SecurityHelper
{
public static String chooseMechanism(List<Object> mechanisms) throws UnsupportedEncodingException
{
HashSet mechanismSet = new HashSet();
for (Object m : mechanisms)
{
mechanismSet.add(m);
}
String preferredMechanisms = CallbackHandlerRegistry.getInstance().getMechanisms();
StringTokenizer prefTokenizer = new StringTokenizer(preferredMechanisms, " ");
while (prefTokenizer.hasMoreTokens())
{
String mech = prefTokenizer.nextToken();
if (mechanismSet.contains(mech))
{
return mech;
}
}
return null;
}
public static AMQPCallbackHandler createCallbackHandler(String mechanism, String username,String password)
throws QpidException
{
Class mechanismClass = CallbackHandlerRegistry.getInstance().getCallbackHandlerClass(mechanism);
try
{
Object instance = mechanismClass.newInstance();
AMQPCallbackHandler cbh = (AMQPCallbackHandler) instance;
cbh.initialise(username,password);
return cbh;
}
catch (Exception e)
{
throw new QpidException("Unable to create callback handler: " + e,ErrorCode.UNDEFINED, e.getCause());
}
}
}