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<?php
/**
* Licensed to Jasig under one or more contributor license
* agreements. See the NOTICE file distributed with this work for
* additional information regarding copyright ownership.
*
* Jasig 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.
*
* PHP Version 5
*
* @file CAS/ProxyChain/AllowedList.php
* @category Authentication
* @package PhpCAS
* @author Adam Franco <afranco@middlebury.edu>
* @license http://www.apache.org/licenses/LICENSE-2.0 Apache License 2.0
* @link https://wiki.jasig.org/display/CASC/phpCAS
*/
/**
* ProxyChain is a container for storing chains of valid proxies that can
* be used to validate proxied requests to a service
*
* @class CAS_ProxyChain_AllowedList
* @category Authentication
* @package PhpCAS
* @author Adam Franco <afranco@middlebury.edu>
* @license http://www.apache.org/licenses/LICENSE-2.0 Apache License 2.0
* @link https://wiki.jasig.org/display/CASC/phpCAS
*/
class CAS_ProxyChain_AllowedList
{
private $_chains = array();
/**
* Check whether proxies are allowed by configuration
*
* @return bool
*/
public function isProxyingAllowed()
{
return (count($this->_chains) > 0);
}
/**
* Add a chain of proxies to the list of possible chains
*
* @param CAS_ProxyChain_Interface $chain A chain of proxies
*
* @return void
*/
public function allowProxyChain(CAS_ProxyChain_Interface $chain)
{
$this->_chains[] = $chain;
}
/**
* Check if the proxies found in the response match the allowed proxies
*
* @param array $proxies list of proxies to check
*
* @return bool whether the proxies match the allowed proxies
*/
public function isProxyListAllowed(array $proxies)
{
phpCAS::traceBegin();
if (empty($proxies)) {
phpCAS::trace("No proxies were found in the response");
phpCAS::traceEnd(true);
return true;
} elseif (!$this->isProxyingAllowed()) {
phpCAS::trace("Proxies are not allowed");
phpCAS::traceEnd(false);
return false;
} else {
$res = $this->contains($proxies);
phpCAS::traceEnd($res);
return $res;
}
}
/**
* Validate the proxies from the proxy ticket validation against the
* chains that were definded.
*
* @param array $list List of proxies from the proxy ticket validation.
*
* @return if any chain fully matches the supplied list
*/
public function contains(array $list)
{
phpCAS::traceBegin();
$count = 0;
foreach ($this->_chains as $chain) {
phpCAS::trace("Checking chain ". $count++);
if ($chain->matches($list)) {
phpCAS::traceEnd(true);
return true;
}
}
phpCAS::trace("No proxy chain matches.");
phpCAS::traceEnd(false);
return false;
}
}
?>
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