5ac857bcdc
This introduces and event that can be listend to when we actually use the CSP. This means that apps no longer have to always inject their CSP but only do so when it is required. Yay for being lazy. Signed-off-by: Roeland Jago Douma <roeland@famdouma.nl>
87 lines
2.8 KiB
PHP
87 lines
2.8 KiB
PHP
<?php
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declare(strict_types=1);
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/**
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* @copyright Copyright (c) 2016, ownCloud, Inc.
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*
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* @author Lukas Reschke <lukas@statuscode.ch>
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*
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* @license AGPL-3.0
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*
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* This code is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License, version 3,
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License, version 3,
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* along with this program. If not, see <http://www.gnu.org/licenses/>
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*
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*/
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namespace OC\Security\CSP;
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use OCP\AppFramework\Http\ContentSecurityPolicy;
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use OCP\AppFramework\Http\EmptyContentSecurityPolicy;
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use OCP\EventDispatcher\IEventDispatcher;
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use OCP\Security\CSP\AddContentSecurityPolicyEvent;
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use OCP\Security\IContentSecurityPolicyManager;
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class ContentSecurityPolicyManager implements IContentSecurityPolicyManager {
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/** @var ContentSecurityPolicy[] */
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private $policies = [];
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/** @var IEventDispatcher */
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private $dispatcher;
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public function __construct(IEventDispatcher $dispatcher) {
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$this->dispatcher = $dispatcher;
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}
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/** {@inheritdoc} */
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public function addDefaultPolicy(EmptyContentSecurityPolicy $policy) {
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$this->policies[] = $policy;
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}
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/**
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* Get the configured default policy. This is not in the public namespace
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* as it is only supposed to be used by core itself.
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*
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* @return ContentSecurityPolicy
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*/
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public function getDefaultPolicy(): ContentSecurityPolicy {
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$event = new AddContentSecurityPolicyEvent($this);
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$this->dispatcher->dispatch(AddContentSecurityPolicyEvent::class, $event);
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$defaultPolicy = new \OC\Security\CSP\ContentSecurityPolicy();
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foreach($this->policies as $policy) {
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$defaultPolicy = $this->mergePolicies($defaultPolicy, $policy);
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}
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return $defaultPolicy;
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}
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/**
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* Merges the first given policy with the second one
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*
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* @param ContentSecurityPolicy $defaultPolicy
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* @param EmptyContentSecurityPolicy $originalPolicy
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* @return ContentSecurityPolicy
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*/
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public function mergePolicies(ContentSecurityPolicy $defaultPolicy,
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EmptyContentSecurityPolicy $originalPolicy): ContentSecurityPolicy {
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foreach((object)(array)$originalPolicy as $name => $value) {
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$setter = 'set'.ucfirst($name);
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if(\is_array($value)) {
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$getter = 'get'.ucfirst($name);
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$currentValues = \is_array($defaultPolicy->$getter()) ? $defaultPolicy->$getter() : [];
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$defaultPolicy->$setter(array_values(array_unique(array_merge($currentValues, $value))));
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} elseif (\is_bool($value)) {
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$defaultPolicy->$setter($value);
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}
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}
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return $defaultPolicy;
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}
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}
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