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<?php
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/**
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* Licensed to Jasig under one or more contributor license
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* agreements. See the NOTICE file distributed with this work for
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* additional information regarding copyright ownership.
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*
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* Jasig licenses this file to you under the Apache License,
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* Version 2.0 (the "License"); you may not use this file except in
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* compliance with the License. You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* PHP Version 7
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*
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* @file CAS/ProxyChain/AllowedList.php
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* @category Authentication
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* @package PhpCAS
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* @author Adam Franco <afranco@middlebury.edu>
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* @license http://www.apache.org/licenses/LICENSE-2.0 Apache License 2.0
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* @link https://wiki.jasig.org/display/CASC/phpCAS
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*/
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/**
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* ProxyChain is a container for storing chains of valid proxies that can
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* be used to validate proxied requests to a service
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*
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* @class CAS_ProxyChain_AllowedList
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* @category Authentication
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* @package PhpCAS
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* @author Adam Franco <afranco@middlebury.edu>
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* @license http://www.apache.org/licenses/LICENSE-2.0 Apache License 2.0
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* @link https://wiki.jasig.org/display/CASC/phpCAS
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*/
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class CAS_ProxyChain_AllowedList
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{
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private $_chains = array();
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/**
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* Check whether proxies are allowed by configuration
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*
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* @return bool
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*/
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public function isProxyingAllowed()
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{
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return (count($this->_chains) > 0);
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}
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/**
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* Add a chain of proxies to the list of possible chains
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*
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* @param CAS_ProxyChain_Interface $chain A chain of proxies
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*
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* @return void
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*/
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public function allowProxyChain(CAS_ProxyChain_Interface $chain)
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{
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$this->_chains[] = $chain;
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}
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/**
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* Check if the proxies found in the response match the allowed proxies
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*
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* @param array $proxies list of proxies to check
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*
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* @return bool whether the proxies match the allowed proxies
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*/
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public function isProxyListAllowed(array $proxies)
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{
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phpCAS::traceBegin();
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if (empty($proxies)) {
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phpCAS::trace("No proxies were found in the response");
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phpCAS::traceEnd(true);
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return true;
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} elseif (!$this->isProxyingAllowed()) {
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phpCAS::trace("Proxies are not allowed");
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phpCAS::traceEnd(false);
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return false;
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} else {
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$res = $this->contains($proxies);
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phpCAS::traceEnd($res);
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return $res;
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}
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}
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/**
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* Validate the proxies from the proxy ticket validation against the
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* chains that were definded.
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*
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* @param array $list List of proxies from the proxy ticket validation.
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*
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* @return bool if any chain fully matches the supplied list
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*/
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public function contains(array $list)
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{
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phpCAS::traceBegin();
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$count = 0;
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foreach ($this->_chains as $chain) {
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phpCAS::trace("Checking chain ". $count++);
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if ($chain->matches($list)) {
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phpCAS::traceEnd(true);
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return true;
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}
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}
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phpCAS::trace("No proxy chain matches.");
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phpCAS::traceEnd(false);
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return false;
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}
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}
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?>
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