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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.
*
*
*/
package org.apache.qpid.server.security.access;
import org.apache.commons.configuration.Configuration;
import org.apache.commons.configuration.ConfigurationException;
import org.apache.qpid.server.registry.ApplicationRegistry;
import org.apache.qpid.server.security.access.plugins.DenyAll;
import org.apache.qpid.configuration.PropertyUtils;
import org.apache.log4j.Logger;
import java.util.List;
import java.lang.reflect.Method;
public class ACLManager
{
private static final Logger _logger = Logger.getLogger(ACLManager.class);
public static ACLPlugin loadACLManager(String name, Configuration hostConfig) throws ConfigurationException
{
ACLPlugin aclPlugin = ApplicationRegistry.getInstance().getAccessManager();
if (hostConfig == null)
{
_logger.warn("No Configuration specified. Using default ACLPlugin '" + aclPlugin.getPluginName()
+ "' for VirtualHost:'" + name + "'");
return aclPlugin;
}
String accessClass = hostConfig.getString("security.access.class");
if (accessClass == null)
{
_logger.warn("No ACL Plugin specified. Using default ACL Plugin '" + aclPlugin.getPluginName() +
"' for VirtualHost:'" + name + "'");
return aclPlugin;
}
Object o;
try
{
o = Class.forName(accessClass).newInstance();
}
catch (Exception e)
{
throw new ConfigurationException("Error initialising ACL: " + e, e);
}
if (!(o instanceof ACLPlugin))
{
throw new ConfigurationException("ACL Plugins must implement the ACLPlugin interface");
}
initialiseAccessControl((ACLPlugin) o, hostConfig);
aclPlugin = getManager((ACLPlugin) o);
if (_logger.isInfoEnabled())
{
_logger.info("Initialised ACL Plugin '" + aclPlugin.getPluginName()
+ "' for virtualhost '" + name + "' successfully");
}
return aclPlugin;
}
private static void initialiseAccessControl(ACLPlugin accessManager, Configuration config)
throws ConfigurationException
{
//First provide the ACLPlugin with the host configuration
accessManager.setConfiguaration(config);
//Provide additional attribute customisation.
String baseName = "security.access.attributes.attribute.";
List<String> argumentNames = config.getList(baseName + "name");
List<String> argumentValues = config.getList(baseName + "value");
for (int i = 0; i < argumentNames.size(); i++)
{
String argName = argumentNames.get(i);
if (argName == null || argName.length() == 0)
{
throw new ConfigurationException("Access Control argument names must have length >= 1 character");
}
if (Character.isLowerCase(argName.charAt(0)))
{
argName = Character.toUpperCase(argName.charAt(0)) + argName.substring(1);
}
String methodName = "set" + argName;
Method method = null;
try
{
method = accessManager.getClass().getMethod(methodName, String.class);
}
catch (NoSuchMethodException e)
{
//do nothing as method will be null
}
if (method == null)
{
throw new ConfigurationException("No method " + methodName + " found in class " + accessManager.getClass() +
" hence unable to configure access control. The method must be public and " +
"have a single String argument with a void return type");
}
try
{
method.invoke(accessManager, PropertyUtils.replaceProperties(argumentValues.get(i)));
}
catch (Exception e)
{
ConfigurationException ce = new ConfigurationException(e.getMessage(), e.getCause());
ce.initCause(e);
throw ce;
}
}
}
private static ACLPlugin getManager(ACLPlugin manager)
{
if (manager == null)
{
if (ApplicationRegistry.getInstance().getAccessManager() == null)
{
return new DenyAll();
}
else
{
return ApplicationRegistry.getInstance().getAccessManager();
}
}
else
{
return manager;
}
}
public static Logger getLogger()
{
return _logger;
}
}
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