2016-01-28 16:33:02 +03:00
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<?php
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/**
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2016-07-21 18:07:57 +03:00
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* @copyright Copyright (c) 2016, ownCloud, Inc.
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*
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2016-05-26 20:56:05 +03:00
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* @author Lukas Reschke <lukas@statuscode.ch>
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2017-11-06 17:56:42 +03:00
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* @author Pierre Rudloff <contact@rudloff.pro>
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* @author Roeland Jago Douma <roeland@famdouma.nl>
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* @author Thomas Citharel <tcit@tcit.fr>
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2016-01-28 16:33:02 +03:00
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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 OCP\AppFramework\Http;
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/**
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* Class EmptyContentSecurityPolicy is a simple helper which allows applications
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* to modify the Content-Security-Policy sent by ownCloud. Per default the policy
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* is forbidding everything.
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*
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* As alternative with sane exemptions look at ContentSecurityPolicy
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*
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* @see \OCP\AppFramework\Http\ContentSecurityPolicy
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* @package OCP\AppFramework\Http
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* @since 9.0.0
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*/
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class EmptyContentSecurityPolicy {
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/** @var bool Whether inline JS snippets are allowed */
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protected $inlineScriptAllowed = null;
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2016-10-24 12:00:00 +03:00
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/** @var string Whether JS nonces should be used */
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protected $useJsNonce = null;
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2016-01-28 16:33:02 +03:00
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/**
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* @var bool Whether eval in JS scripts is allowed
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* TODO: Disallow per default
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* @link https://github.com/owncloud/core/issues/11925
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*/
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protected $evalScriptAllowed = null;
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/** @var array Domains from which scripts can get loaded */
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protected $allowedScriptDomains = null;
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/**
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* @var bool Whether inline CSS is allowed
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* TODO: Disallow per default
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* @link https://github.com/owncloud/core/issues/13458
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*/
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protected $inlineStyleAllowed = null;
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/** @var array Domains from which CSS can get loaded */
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protected $allowedStyleDomains = null;
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/** @var array Domains from which images can get loaded */
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protected $allowedImageDomains = null;
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/** @var array Domains to which connections can be done */
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protected $allowedConnectDomains = null;
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/** @var array Domains from which media elements can be loaded */
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protected $allowedMediaDomains = null;
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/** @var array Domains from which object elements can be loaded */
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protected $allowedObjectDomains = null;
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/** @var array Domains from which iframes can be loaded */
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protected $allowedFrameDomains = null;
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/** @var array Domains from which fonts can be loaded */
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protected $allowedFontDomains = null;
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/** @var array Domains from which web-workers and nested browsing content can load elements */
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protected $allowedChildSrcDomains = null;
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2017-07-27 18:25:09 +03:00
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/** @var array Domains which can embed this Nextcloud instance */
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2017-06-19 14:55:46 +03:00
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protected $allowedFrameAncestors = null;
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2018-09-03 17:47:52 +03:00
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/** @var array Domains from which web-workers can be loaded */
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protected $allowedWorkerSrcDomains = null;
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2019-07-31 00:13:46 +03:00
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/** @var array Domains which can be used as target for forms */
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protected $allowedFormActionDomains = null;
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2016-01-28 16:33:02 +03:00
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2018-10-16 15:04:22 +03:00
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/** @var array Locations to report violations to */
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protected $reportTo = null;
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2016-01-28 16:33:02 +03:00
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/**
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* Whether inline JavaScript snippets are allowed or forbidden
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* @param bool $state
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* @return $this
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* @since 8.1.0
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2016-10-24 12:00:00 +03:00
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* @deprecated 10.0 CSP tokens are now used
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2016-01-28 16:33:02 +03:00
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*/
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public function allowInlineScript($state = false) {
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$this->inlineScriptAllowed = $state;
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return $this;
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}
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2016-10-24 12:00:00 +03:00
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/**
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* Use the according JS nonce
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*
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* @param string $nonce
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* @return $this
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2016-11-15 20:51:52 +03:00
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* @since 11.0.0
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2016-10-24 12:00:00 +03:00
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*/
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public function useJsNonce($nonce) {
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$this->useJsNonce = $nonce;
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return $this;
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}
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2016-01-28 16:33:02 +03:00
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/**
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* Whether eval in JavaScript is allowed or forbidden
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* @param bool $state
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* @return $this
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* @since 8.1.0
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2019-08-29 15:52:10 +03:00
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* @deprecated Eval should not be used anymore. Please update your scripts. This function will stop functioning in a future version of Nextcloud.
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2016-01-28 16:33:02 +03:00
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*/
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public function allowEvalScript($state = true) {
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$this->evalScriptAllowed = $state;
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return $this;
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}
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/**
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* Allows to execute JavaScript files from a specific domain. Use * to
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* allow JavaScript from all domains.
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* @param string $domain Domain to whitelist. Any passed value needs to be properly sanitized.
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* @return $this
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* @since 8.1.0
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*/
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public function addAllowedScriptDomain($domain) {
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$this->allowedScriptDomains[] = $domain;
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return $this;
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}
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/**
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* Remove the specified allowed script domain from the allowed domains.
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*
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* @param string $domain
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* @return $this
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* @since 8.1.0
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*/
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public function disallowScriptDomain($domain) {
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$this->allowedScriptDomains = array_diff($this->allowedScriptDomains, [$domain]);
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return $this;
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}
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/**
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* Whether inline CSS snippets are allowed or forbidden
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* @param bool $state
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* @return $this
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* @since 8.1.0
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*/
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public function allowInlineStyle($state = true) {
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$this->inlineStyleAllowed = $state;
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return $this;
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}
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/**
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* Allows to execute CSS files from a specific domain. Use * to allow
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* CSS from all domains.
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* @param string $domain Domain to whitelist. Any passed value needs to be properly sanitized.
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* @return $this
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* @since 8.1.0
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*/
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public function addAllowedStyleDomain($domain) {
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$this->allowedStyleDomains[] = $domain;
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return $this;
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}
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/**
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* Remove the specified allowed style domain from the allowed domains.
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*
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* @param string $domain
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* @return $this
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* @since 8.1.0
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*/
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public function disallowStyleDomain($domain) {
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$this->allowedStyleDomains = array_diff($this->allowedStyleDomains, [$domain]);
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return $this;
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}
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/**
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* Allows using fonts from a specific domain. Use * to allow
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* fonts from all domains.
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* @param string $domain Domain to whitelist. Any passed value needs to be properly sanitized.
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* @return $this
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* @since 8.1.0
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*/
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public function addAllowedFontDomain($domain) {
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$this->allowedFontDomains[] = $domain;
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return $this;
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}
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/**
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* Remove the specified allowed font domain from the allowed domains.
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*
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* @param string $domain
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* @return $this
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* @since 8.1.0
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*/
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public function disallowFontDomain($domain) {
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$this->allowedFontDomains = array_diff($this->allowedFontDomains, [$domain]);
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return $this;
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}
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/**
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* Allows embedding images from a specific domain. Use * to allow
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* images from all domains.
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* @param string $domain Domain to whitelist. Any passed value needs to be properly sanitized.
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* @return $this
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* @since 8.1.0
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*/
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public function addAllowedImageDomain($domain) {
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$this->allowedImageDomains[] = $domain;
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return $this;
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}
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/**
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* Remove the specified allowed image domain from the allowed domains.
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*
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* @param string $domain
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* @return $this
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* @since 8.1.0
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*/
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public function disallowImageDomain($domain) {
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$this->allowedImageDomains = array_diff($this->allowedImageDomains, [$domain]);
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return $this;
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}
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/**
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* To which remote domains the JS connect to.
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* @param string $domain Domain to whitelist. Any passed value needs to be properly sanitized.
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* @return $this
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* @since 8.1.0
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*/
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public function addAllowedConnectDomain($domain) {
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$this->allowedConnectDomains[] = $domain;
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return $this;
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}
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/**
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* Remove the specified allowed connect domain from the allowed domains.
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*
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* @param string $domain
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* @return $this
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* @since 8.1.0
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*/
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public function disallowConnectDomain($domain) {
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$this->allowedConnectDomains = array_diff($this->allowedConnectDomains, [$domain]);
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return $this;
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}
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/**
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* From which domains media elements can be embedded.
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* @param string $domain Domain to whitelist. Any passed value needs to be properly sanitized.
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* @return $this
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* @since 8.1.0
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*/
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public function addAllowedMediaDomain($domain) {
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$this->allowedMediaDomains[] = $domain;
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return $this;
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}
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/**
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* Remove the specified allowed media domain from the allowed domains.
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*
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* @param string $domain
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* @return $this
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* @since 8.1.0
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*/
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public function disallowMediaDomain($domain) {
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$this->allowedMediaDomains = array_diff($this->allowedMediaDomains, [$domain]);
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return $this;
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}
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/**
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* From which domains objects such as <object>, <embed> or <applet> are executed
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* @param string $domain Domain to whitelist. Any passed value needs to be properly sanitized.
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* @return $this
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* @since 8.1.0
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*/
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public function addAllowedObjectDomain($domain) {
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$this->allowedObjectDomains[] = $domain;
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return $this;
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}
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/**
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* Remove the specified allowed object domain from the allowed domains.
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*
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* @param string $domain
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* @return $this
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* @since 8.1.0
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*/
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public function disallowObjectDomain($domain) {
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$this->allowedObjectDomains = array_diff($this->allowedObjectDomains, [$domain]);
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return $this;
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}
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/**
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* Which domains can be embedded in an iframe
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* @param string $domain Domain to whitelist. Any passed value needs to be properly sanitized.
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* @return $this
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* @since 8.1.0
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*/
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public function addAllowedFrameDomain($domain) {
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$this->allowedFrameDomains[] = $domain;
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return $this;
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}
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/**
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* Remove the specified allowed frame domain from the allowed domains.
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*
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* @param string $domain
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* @return $this
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* @since 8.1.0
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*/
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public function disallowFrameDomain($domain) {
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$this->allowedFrameDomains = array_diff($this->allowedFrameDomains, [$domain]);
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return $this;
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}
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/**
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* Domains from which web-workers and nested browsing content can load elements
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* @param string $domain Domain to whitelist. Any passed value needs to be properly sanitized.
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* @return $this
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* @since 8.1.0
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2018-09-03 17:54:33 +03:00
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* @deprecated 15.0.0 use addAllowedWorkerSrcDomains or addAllowedFrameDomain
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2016-01-28 16:33:02 +03:00
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*/
|
|
|
|
|
public function addAllowedChildSrcDomain($domain) {
|
|
|
|
|
$this->allowedChildSrcDomains[] = $domain;
|
|
|
|
|
return $this;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* Remove the specified allowed child src domain from the allowed domains.
|
|
|
|
|
*
|
|
|
|
|
* @param string $domain
|
|
|
|
|
* @return $this
|
|
|
|
|
* @since 8.1.0
|
2018-09-03 17:54:33 +03:00
|
|
|
|
* @deprecated 15.0.0 use the WorkerSrcDomains or FrameDomain
|
2016-01-28 16:33:02 +03:00
|
|
|
|
*/
|
|
|
|
|
public function disallowChildSrcDomain($domain) {
|
|
|
|
|
$this->allowedChildSrcDomains = array_diff($this->allowedChildSrcDomains, [$domain]);
|
|
|
|
|
return $this;
|
|
|
|
|
}
|
|
|
|
|
|
2017-06-19 14:55:46 +03:00
|
|
|
|
/**
|
2017-07-27 18:25:09 +03:00
|
|
|
|
* Domains which can embed an iFrame of the Nextcloud instance
|
2017-06-19 14:55:46 +03:00
|
|
|
|
*
|
|
|
|
|
* @param string $domain
|
|
|
|
|
* @return $this
|
2017-07-27 18:25:09 +03:00
|
|
|
|
* @since 13.0.0
|
2017-06-19 14:55:46 +03:00
|
|
|
|
*/
|
|
|
|
|
public function addAllowedFrameAncestorDomain($domain) {
|
|
|
|
|
$this->allowedFrameAncestors[] = $domain;
|
|
|
|
|
return $this;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
2017-07-27 18:25:09 +03:00
|
|
|
|
* Domains which can embed an iFrame of the Nextcloud instance
|
2017-06-19 14:55:46 +03:00
|
|
|
|
*
|
|
|
|
|
* @param string $domain
|
|
|
|
|
* @return $this
|
2017-07-27 18:25:09 +03:00
|
|
|
|
* @since 13.0.0
|
2017-06-19 14:55:46 +03:00
|
|
|
|
*/
|
|
|
|
|
public function disallowFrameAncestorDomain($domain) {
|
|
|
|
|
$this->allowedFrameAncestors = array_diff($this->allowedFrameAncestors, [$domain]);
|
|
|
|
|
return $this;
|
|
|
|
|
}
|
|
|
|
|
|
2018-09-03 17:47:52 +03:00
|
|
|
|
/**
|
|
|
|
|
* Domain from which workers can be loaded
|
|
|
|
|
*
|
|
|
|
|
* @param string $domain
|
|
|
|
|
* @return $this
|
|
|
|
|
* @since 15.0.0
|
|
|
|
|
*/
|
|
|
|
|
public function addAllowedWorkerSrcDomain(string $domain) {
|
|
|
|
|
$this->allowedWorkerSrcDomains[] = $domain;
|
|
|
|
|
return $this;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* Remove domain from which workers can be loaded
|
|
|
|
|
*
|
|
|
|
|
* @param string $domain
|
|
|
|
|
* @return $this
|
|
|
|
|
* @since 15.0.0
|
|
|
|
|
*/
|
|
|
|
|
public function disallowWorkerSrcDomain(string $domain) {
|
|
|
|
|
$this->allowedWorkerSrcDomains = array_diff($this->allowedWorkerSrcDomains, [$domain]);
|
|
|
|
|
return $this;
|
|
|
|
|
}
|
|
|
|
|
|
2019-07-31 00:13:46 +03:00
|
|
|
|
/**
|
|
|
|
|
* Domain to where forms can submit
|
|
|
|
|
*
|
|
|
|
|
* @since 17.0.0
|
|
|
|
|
*
|
|
|
|
|
* @return $this
|
|
|
|
|
*/
|
|
|
|
|
public function addAllowedFormActionDomain(string $domain) {
|
|
|
|
|
$this->allowedFormActionDomains[] = $domain;
|
|
|
|
|
return $this;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* Remove domain to where forms can submit
|
|
|
|
|
*
|
|
|
|
|
* @return $this
|
|
|
|
|
* @since 17.0.0
|
|
|
|
|
*/
|
|
|
|
|
public function disallowFormActionDomain(string $domain) {
|
|
|
|
|
$this->allowedFormActionDomains = array_diff($this->allowedFormActionDomains, [$domain]);
|
|
|
|
|
return $this;
|
|
|
|
|
}
|
|
|
|
|
|
2018-10-16 15:04:22 +03:00
|
|
|
|
/**
|
|
|
|
|
* Add location to report CSP violations to
|
|
|
|
|
*
|
|
|
|
|
* @param string $location
|
|
|
|
|
* @return $this
|
|
|
|
|
* @since 15.0.0
|
|
|
|
|
*/
|
|
|
|
|
public function addReportTo(string $location) {
|
|
|
|
|
$this->reportTo[] = $location;
|
|
|
|
|
return $this;
|
|
|
|
|
}
|
|
|
|
|
|
2016-01-28 16:33:02 +03:00
|
|
|
|
/**
|
|
|
|
|
* Get the generated Content-Security-Policy as a string
|
|
|
|
|
* @return string
|
|
|
|
|
* @since 8.1.0
|
|
|
|
|
*/
|
|
|
|
|
public function buildPolicy() {
|
|
|
|
|
$policy = "default-src 'none';";
|
2017-03-16 17:16:20 +03:00
|
|
|
|
$policy .= "base-uri 'none';";
|
2016-09-20 18:24:29 +03:00
|
|
|
|
$policy .= "manifest-src 'self';";
|
2016-01-28 16:33:02 +03:00
|
|
|
|
|
|
|
|
|
if(!empty($this->allowedScriptDomains) || $this->inlineScriptAllowed || $this->evalScriptAllowed) {
|
|
|
|
|
$policy .= 'script-src ';
|
2016-10-24 12:00:00 +03:00
|
|
|
|
if(is_string($this->useJsNonce)) {
|
|
|
|
|
$policy .= '\'nonce-'.base64_encode($this->useJsNonce).'\'';
|
|
|
|
|
$allowedScriptDomains = array_flip($this->allowedScriptDomains);
|
|
|
|
|
unset($allowedScriptDomains['\'self\'']);
|
|
|
|
|
$this->allowedScriptDomains = array_flip($allowedScriptDomains);
|
|
|
|
|
if(count($allowedScriptDomains) !== 0) {
|
|
|
|
|
$policy .= ' ';
|
|
|
|
|
}
|
|
|
|
|
}
|
2016-01-28 16:33:02 +03:00
|
|
|
|
if(is_array($this->allowedScriptDomains)) {
|
|
|
|
|
$policy .= implode(' ', $this->allowedScriptDomains);
|
|
|
|
|
}
|
|
|
|
|
if($this->inlineScriptAllowed) {
|
|
|
|
|
$policy .= ' \'unsafe-inline\'';
|
|
|
|
|
}
|
|
|
|
|
if($this->evalScriptAllowed) {
|
|
|
|
|
$policy .= ' \'unsafe-eval\'';
|
|
|
|
|
}
|
|
|
|
|
$policy .= ';';
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if(!empty($this->allowedStyleDomains) || $this->inlineStyleAllowed) {
|
|
|
|
|
$policy .= 'style-src ';
|
|
|
|
|
if(is_array($this->allowedStyleDomains)) {
|
|
|
|
|
$policy .= implode(' ', $this->allowedStyleDomains);
|
|
|
|
|
}
|
|
|
|
|
if($this->inlineStyleAllowed) {
|
|
|
|
|
$policy .= ' \'unsafe-inline\'';
|
|
|
|
|
}
|
|
|
|
|
$policy .= ';';
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if(!empty($this->allowedImageDomains)) {
|
|
|
|
|
$policy .= 'img-src ' . implode(' ', $this->allowedImageDomains);
|
|
|
|
|
$policy .= ';';
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if(!empty($this->allowedFontDomains)) {
|
|
|
|
|
$policy .= 'font-src ' . implode(' ', $this->allowedFontDomains);
|
|
|
|
|
$policy .= ';';
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if(!empty($this->allowedConnectDomains)) {
|
|
|
|
|
$policy .= 'connect-src ' . implode(' ', $this->allowedConnectDomains);
|
|
|
|
|
$policy .= ';';
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if(!empty($this->allowedMediaDomains)) {
|
|
|
|
|
$policy .= 'media-src ' . implode(' ', $this->allowedMediaDomains);
|
|
|
|
|
$policy .= ';';
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if(!empty($this->allowedObjectDomains)) {
|
|
|
|
|
$policy .= 'object-src ' . implode(' ', $this->allowedObjectDomains);
|
|
|
|
|
$policy .= ';';
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if(!empty($this->allowedFrameDomains)) {
|
2019-03-16 22:19:43 +03:00
|
|
|
|
$policy .= 'frame-src ';
|
|
|
|
|
$policy .= implode(' ', $this->allowedFrameDomains);
|
2016-01-28 16:33:02 +03:00
|
|
|
|
$policy .= ';';
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if(!empty($this->allowedChildSrcDomains)) {
|
|
|
|
|
$policy .= 'child-src ' . implode(' ', $this->allowedChildSrcDomains);
|
|
|
|
|
$policy .= ';';
|
|
|
|
|
}
|
|
|
|
|
|
2017-06-19 14:55:46 +03:00
|
|
|
|
if(!empty($this->allowedFrameAncestors)) {
|
|
|
|
|
$policy .= 'frame-ancestors ' . implode(' ', $this->allowedFrameAncestors);
|
|
|
|
|
$policy .= ';';
|
|
|
|
|
}
|
|
|
|
|
|
2018-09-03 17:47:52 +03:00
|
|
|
|
if (!empty($this->allowedWorkerSrcDomains)) {
|
|
|
|
|
$policy .= 'worker-src ' . implode(' ', $this->allowedWorkerSrcDomains);
|
|
|
|
|
$policy .= ';';
|
|
|
|
|
}
|
|
|
|
|
|
2019-07-31 00:13:46 +03:00
|
|
|
|
if (!empty($this->allowedFormActionDomains)) {
|
|
|
|
|
$policy .= 'form-action ' . implode(' ', $this->allowedFormActionDomains);
|
|
|
|
|
$policy .= ';';
|
|
|
|
|
}
|
|
|
|
|
|
2018-10-16 15:04:22 +03:00
|
|
|
|
if (!empty($this->reportTo)) {
|
|
|
|
|
$policy .= 'report-uri ' . implode(' ', $this->reportTo);
|
|
|
|
|
$policy .= ';';
|
|
|
|
|
}
|
|
|
|
|
|
2016-01-28 16:33:02 +03:00
|
|
|
|
return rtrim($policy, ';');
|
|
|
|
|
}
|
|
|
|
|
}
|