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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.naming;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
/**
* Handles the access control on the JNDI contexts.
*
* @author Remy Maucherat
*/
public class ContextAccessController {
// -------------------------------------------------------------- Variables
/**
* Catalina context names on which writing is not allowed.
*/
private static final Map<Object,Object> readOnlyContexts = new ConcurrentHashMap<>();
/**
* Security tokens repository.
*/
private static final Map<Object,Object> securityTokens = new ConcurrentHashMap<>();
// --------------------------------------------------------- Public Methods
/**
* Set a security token for a Catalina context. Can be set only once.
*
* @param name Name of the Catalina context
* @param token Security token
*/
public static void setSecurityToken(Object name, Object token) {
SecurityManager sm = System.getSecurityManager();
if (sm != null) {
sm.checkPermission(new RuntimePermission(
ContextAccessController.class.getName()
+ ".setSecurityToken"));
}
if ((!securityTokens.containsKey(name)) && (token != null)) {
securityTokens.put(name, token);
}
}
/**
* Remove a security token for a context.
*
* @param name Name of the Catalina context
* @param token Security token
*/
public static void unsetSecurityToken(Object name, Object token) {
if (checkSecurityToken(name, token)) {
securityTokens.remove(name);
}
}
/**
* Check a submitted security token.
*
* @param name Name of the Catalina context
* @param token Submitted security token
*
* @return <code>true</code> if the submitted token is equal to the token
* in the repository or if no token is present in the repository.
* Otherwise, <code>false</code>
*/
public static boolean checkSecurityToken
(Object name, Object token) {
Object refToken = securityTokens.get(name);
return (refToken == null || refToken.equals(token));
}
/**
* Allow writing to a context.
*
* @param name Name of the Catalina context
* @param token Security token
*/
public static void setWritable(Object name, Object token) {
if (checkSecurityToken(name, token)) {
readOnlyContexts.remove(name);
}
}
/**
* Set whether or not a Catalina context is writable.
*
* @param name Name of the Catalina context
*/
public static void setReadOnly(Object name) {
readOnlyContexts.put(name, name);
}
/**
* Is the context is writable?
*
* @param name Name of the Catalina context
*
* @return <code>true</code> if it is writable, otherwise <code>false</code>
*/
public static boolean isWritable(Object name) {
return !(readOnlyContexts.containsKey(name));
}
}
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