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<?php
/**
* @copyright Copyright (c) 2016, ownCloud, Inc.
*
* @author Lukas Reschke <lukas@statuscode.ch>
*
* @license AGPL-3.0
*
* This code is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License, version 3,
* along with this program. If not, see <http://www.gnu.org/licenses/>
*
*/
namespace OC\Security\CSP;
use OCP\AppFramework\Http\ContentSecurityPolicy;
use OCP\AppFramework\Http\EmptyContentSecurityPolicy;
use OCP\Security\IContentSecurityPolicyManager;
class ContentSecurityPolicyManager implements IContentSecurityPolicyManager {
/** @var ContentSecurityPolicy[] */
private $policies = [];
/** {@inheritdoc} */
public function addDefaultPolicy(EmptyContentSecurityPolicy $policy) {
$this->policies[] = $policy;
}
/**
* Get the configured default policy. This is not in the public namespace
* as it is only supposed to be used by core itself.
*
* @return ContentSecurityPolicy
*/
public function getDefaultPolicy() {
$defaultPolicy = new \OC\Security\CSP\ContentSecurityPolicy();
foreach($this->policies as $policy) {
$defaultPolicy = $this->mergePolicies($defaultPolicy, $policy);
}
return $defaultPolicy;
}
/**
* Merges the first given policy with the second one
*
* @param ContentSecurityPolicy $defaultPolicy
* @param EmptyContentSecurityPolicy $originalPolicy
* @return ContentSecurityPolicy
*/
public function mergePolicies(ContentSecurityPolicy $defaultPolicy,
EmptyContentSecurityPolicy $originalPolicy) {
foreach((object)(array)$originalPolicy as $name => $value) {
$setter = 'set'.ucfirst($name);
if(is_array($value)) {
$getter = 'get'.ucfirst($name);
$currentValues = is_array($defaultPolicy->$getter()) ? $defaultPolicy->$getter() : [];
$defaultPolicy->$setter(array_values(array_unique(array_merge($currentValues, $value))));
} elseif (is_bool($value)) {
$defaultPolicy->$setter($value);
}
}
return $defaultPolicy;
}
}
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