809ff5ac95
Allows to inject something into the default content policy. This is for
example useful when you're injecting Javascript code into a view belonging
to another controller and cannot modify its Content-Security-Policy itself.
Note that the adjustment is only applied to applications that use AppFramework
controllers.
To use this from your `app.php` use `\OC::$server->getContentSecurityPolicyManager()->addDefaultPolicy($policy)`,
$policy has to be of type `\OCP\AppFramework\Http\ContentSecurityPolicy`.
To test this add something like the following into an `app.php` of any enabled app:
```
$manager = \OC::$server->getContentSecurityPolicyManager();
$policy = new \OCP\AppFramework\Http\ContentSecurityPolicy(false);
$policy->addAllowedFrameDomain('asdf');
$policy->addAllowedScriptDomain('yolo.com');
$policy->allowInlineScript(false);
$manager->addDefaultPolicy($policy);
$policy = new \OCP\AppFramework\Http\ContentSecurityPolicy(false);
$policy->addAllowedFontDomain('yolo.com');
$manager->addDefaultPolicy($policy);
$policy = new \OCP\AppFramework\Http\ContentSecurityPolicy(false);
$policy->addAllowedFrameDomain('banana.com');
$manager->addDefaultPolicy($policy);
```
If you now open the files app the policy should be:
```
Content-Security-Policy:default-src 'none';script-src yolo.com 'self' 'unsafe-eval';style-src 'self' 'unsafe-inline';img-src 'self' data: blob:;font-src yolo.com 'self';connect-src 'self';media-src 'self';frame-src asdf banana.com 'self'
```
73 lines
2.3 KiB
PHP
73 lines
2.3 KiB
PHP
<?php
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/**
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* @author Lukas Reschke <lukas@owncloud.com>
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*
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* @copyright Copyright (c) 2016, ownCloud, Inc.
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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\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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/** {@inheritdoc} */
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public function addDefaultPolicy(EmptyContentSecurityPolicy $policy) {
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$this->policies[] = $policy;
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}
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/**
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* Get the configured default policy. This is not in the public namespace
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* as it is only supposed to be used by core itself.
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*
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* @return ContentSecurityPolicy
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*/
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public function getDefaultPolicy() {
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$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 $originalPolicy) {
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foreach((object)(array)$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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