nextcloud-server/lib/public/AppFramework/Http/StrictContentSecurityPolicy.php

<?php
declare(strict_types=1);
/**
 * @copyright 2018, Roeland Jago Douma <roeland@famdouma.nl>
 *
 * @author Roeland Jago Douma <roeland@famdouma.nl>
 *
 * @license GNU AGPL version 3 or any later version
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * 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
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

namespace OCP\AppFramework\Http;

/**
 * Class StrictContentSecurityPolicy is a simple helper which allows applications to
 * modify the Content-Security-Policy sent by Nextcloud. Per default only JavaScript,
 * stylesheets, images, fonts, media and connections from the same domain
 * ('self') are allowed.
 *
 * Even if a value gets modified above defaults will still get appended. Please
 * notice that Nextcloud ships already with sensible defaults and those policies
 * should require no modification at all for most use-cases.
 *
 * This class represents out strictest defaults. They may get change from release
 * to release if more strict CSP directives become available.
 *
 * @package OCP\AppFramework\Http
 * @since 14.0.0
 */
class StrictContentSecurityPolicy extends EmptyContentSecurityPolicy {
	/** @var bool Whether inline JS snippets are allowed */
	protected $inlineScriptAllowed = false;
	/** @var bool Whether eval in JS scripts is allowed */
	protected $evalScriptAllowed = false;
	/** @var array Domains from which scripts can get loaded */
	protected $allowedScriptDomains = [
		'\'self\'',
	];
	/** @var bool Whether inline CSS is allowed */
	protected $inlineStyleAllowed = false;
	/** @var array Domains from which CSS can get loaded */
	protected $allowedStyleDomains = [
		'\'self\'',
	];
	/** @var array Domains from which images can get loaded */
	protected $allowedImageDomains = [
		'\'self\'',
		'data:',
		'blob:',
	];
	/** @var array Domains to which connections can be done */
	protected $allowedConnectDomains = [
		'\'self\'',
	];
	/** @var array Domains from which media elements can be loaded */
	protected $allowedMediaDomains = [
		'\'self\'',
	];
	/** @var array Domains from which object elements can be loaded */
	protected $allowedObjectDomains = [];
	/** @var array Domains from which iframes can be loaded */
	protected $allowedFrameDomains = [];
	/** @var array Domains from which fonts can be loaded */
	protected $allowedFontDomains = [
		'\'self\'',
	];
	/** @var array Domains from which web-workers and nested browsing content can load elements */
	protected $allowedChildSrcDomains = [];

	/** @var array Domains which can embed this Nextcloud instance */
	protected $allowedFrameAncestors = [];
}