128 lines
4.3 KiB
PHP
128 lines
4.3 KiB
PHP
<?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.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
|
|
*/
|
|
|
|
/**
|
|
* A normal proxy-chain definition that lists each level of the chain as either
|
|
* a string or regular expression.
|
|
*
|
|
* @class CAS_ProxyChain
|
|
* @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
|
|
implements CAS_ProxyChain_Interface
|
|
{
|
|
|
|
protected $chain = array();
|
|
|
|
/**
|
|
* A chain is an array of strings or regexp strings that will be matched
|
|
* against. Regexp will be matched with preg_match and strings will be
|
|
* matched from the beginning. A string must fully match the beginning of
|
|
* an proxy url. So you can define a full domain as acceptable or go further
|
|
* down.
|
|
* Proxies have to be defined in reverse from the service to the user. If a
|
|
* user hits service A get proxied via B to service C the list of acceptable
|
|
* proxies on C would be array(B,A);
|
|
*
|
|
* @param array $chain A chain of proxies
|
|
*/
|
|
public function __construct(array $chain)
|
|
{
|
|
// Ensure that we have an indexed array
|
|
$this->chain = array_values($chain);
|
|
}
|
|
|
|
/**
|
|
* Match a list of proxies.
|
|
*
|
|
* @param array $list The list of proxies in front of this service.
|
|
*
|
|
* @return bool
|
|
*/
|
|
public function matches(array $list)
|
|
{
|
|
$list = array_values($list); // Ensure that we have an indexed array
|
|
if ($this->isSizeValid($list)) {
|
|
$mismatch = false;
|
|
foreach ($this->chain as $i => $search) {
|
|
$proxy_url = $list[$i];
|
|
if (preg_match('/^\/.*\/[ixASUXu]*$/s', $search)) {
|
|
if (preg_match($search, $proxy_url)) {
|
|
phpCAS::trace(
|
|
"Found regexp " . $search . " matching " . $proxy_url
|
|
);
|
|
} else {
|
|
phpCAS::trace(
|
|
"No regexp match " . $search . " != " . $proxy_url
|
|
);
|
|
$mismatch = true;
|
|
break;
|
|
}
|
|
} else {
|
|
if (strncasecmp($search, $proxy_url, strlen($search)) == 0) {
|
|
phpCAS::trace(
|
|
"Found string " . $search . " matching " . $proxy_url
|
|
);
|
|
} else {
|
|
phpCAS::trace(
|
|
"No match " . $search . " != " . $proxy_url
|
|
);
|
|
$mismatch = true;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
if (!$mismatch) {
|
|
phpCAS::trace("Proxy chain matches");
|
|
return true;
|
|
}
|
|
} else {
|
|
phpCAS::trace("Proxy chain skipped: size mismatch");
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Validate the size of the the list as compared to our chain.
|
|
*
|
|
* @param array $list List of proxies
|
|
*
|
|
* @return bool
|
|
*/
|
|
protected function isSizeValid (array $list)
|
|
{
|
|
return (sizeof($this->chain) == sizeof($list));
|
|
}
|
|
}
|