nextcloud/lib/private/Security/CSP/ContentSecurityPolicyManage...

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Add public API to give developers the possibility to adjust the global CSP defaults 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' ```
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<?php
/**
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* @copyright Copyright (c) 2016, ownCloud, Inc.
*
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* @author Lukas Reschke <lukas@statuscode.ch>
Add public API to give developers the possibility to adjust the global CSP defaults 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' ```
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*
* @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;
}
}