Add stricter CSPs

* Deprecate our default CSP
* Add strict CSP that is always our strictest setting
* Add strict eval CSP (disable unsafe-eval)
* Add strict inline CSP (disables inline styles)

This is just to move forward and have a incremental improvement of our
CSP

Signed-off-by: Roeland Jago Douma <roeland@famdouma.nl>

lib/composer/composer/autoload_classmap.php

@@ -40,6 +40,9 @@ return array(
     'OCP\\AppFramework\\Http\\RedirectResponse' => $baseDir . '/lib/public/AppFramework/Http/RedirectResponse.php',
     'OCP\\AppFramework\\Http\\Response' => $baseDir . '/lib/public/AppFramework/Http/Response.php',
     'OCP\\AppFramework\\Http\\StreamResponse' => $baseDir . '/lib/public/AppFramework/Http/StreamResponse.php',
+    'OCP\\AppFramework\\Http\\StrictContentSecurityPolicy' => $baseDir . '/lib/public/AppFramework/Http/StrictContentSecurityPolicy.php',
+    'OCP\\AppFramework\\Http\\StrictEvalContentSecurityPolicy' => $baseDir . '/lib/public/AppFramework/Http/StrictEvalContentSecurityPolicy.php',
+    'OCP\\AppFramework\\Http\\StrictInlineContentSecurityPolicy' => $baseDir . '/lib/public/AppFramework/Http/StrictInlineContentSecurityPolicy.php',
     'OCP\\AppFramework\\Http\\TemplateResponse' => $baseDir . '/lib/public/AppFramework/Http/TemplateResponse.php',
     'OCP\\AppFramework\\Http\\Template\\ExternalShareMenuAction' => $baseDir . '/lib/public/AppFramework/Http/Template/ExternalShareMenuAction.php',
     'OCP\\AppFramework\\Http\\Template\\IMenuAction' => $baseDir . '/lib/public/AppFramework/Http/Template/IMenuAction.php',

lib/composer/composer/autoload_static.php

@@ -70,6 +70,9 @@ class ComposerStaticInit53792487c5a8370acc0b06b1a864ff4c
         'OCP\\AppFramework\\Http\\RedirectResponse' => __DIR__ . '/../../..' . '/lib/public/AppFramework/Http/RedirectResponse.php',
         'OCP\\AppFramework\\Http\\Response' => __DIR__ . '/../../..' . '/lib/public/AppFramework/Http/Response.php',
         'OCP\\AppFramework\\Http\\StreamResponse' => __DIR__ . '/../../..' . '/lib/public/AppFramework/Http/StreamResponse.php',
+        'OCP\\AppFramework\\Http\\StrictContentSecurityPolicy' => __DIR__ . '/../../..' . '/lib/public/AppFramework/Http/StrictContentSecurityPolicy.php',
+        'OCP\\AppFramework\\Http\\StrictEvalContentSecurityPolicy' => __DIR__ . '/../../..' . '/lib/public/AppFramework/Http/StrictEvalContentSecurityPolicy.php',
+        'OCP\\AppFramework\\Http\\StrictInlineContentSecurityPolicy' => __DIR__ . '/../../..' . '/lib/public/AppFramework/Http/StrictInlineContentSecurityPolicy.php',
         'OCP\\AppFramework\\Http\\TemplateResponse' => __DIR__ . '/../../..' . '/lib/public/AppFramework/Http/TemplateResponse.php',
         'OCP\\AppFramework\\Http\\Template\\ExternalShareMenuAction' => __DIR__ . '/../../..' . '/lib/public/AppFramework/Http/Template/ExternalShareMenuAction.php',
         'OCP\\AppFramework\\Http\\Template\\IMenuAction' => __DIR__ . '/../../..' . '/lib/public/AppFramework/Http/Template/IMenuAction.php',

lib/public/AppFramework/Http/ContentSecurityPolicy.php

@@ -27,16 +27,19 @@ namespace OCP\AppFramework\Http;
 
 /**
  * Class ContentSecurityPolicy is a simple helper which allows applications to
- * modify the Content-Security-Policy sent by ownCloud. Per default only JavaScript,
+ * 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 ownCloud ships already with sensible defaults and those policies
+ * notice that Nextcloud ships already with sensible defaults and those policies
  * should require no modification at all for most use-cases.
  *
+ * This class allows unsafe-eval of javascript and unsafe-inline of CSS.
+ *
  * @package OCP\AppFramework\Http
  * @since 8.1.0
+ * @deprecated 14.0.0 Use one of our stricter CSP policies
  */
 class ContentSecurityPolicy extends EmptyContentSecurityPolicy {
 	/** @var bool Whether inline JS snippets are allowed */

lib/public/AppFramework/Http/StrictContentSecurityPolicy.php

@@ -0,0 +1,85 @@
+<?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 = [];
+}

lib/public/AppFramework/Http/StrictEvalContentSecurityPolicy.php

@@ -0,0 +1,51 @@
+<?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 StrictInlineContentSecurityPolicy 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 is a temp helper class from the default ContentSecurityPolicy to allow slow
+ * migration to a stricter CSP. This does not allow unsafe eval.
+ *
+ * @package OCP\AppFramework\Http
+ * @since 14.0.0
+ */
+class StrictEvalContentSecurityPolicy extends ContentSecurityPolicy {
+
+	/**
+	 * @since 14.0.0
+	 */
+	public function __construct() {
+		$this->inlineStyleAllowed = false;
+	}
+}

lib/public/AppFramework/Http/StrictInlineContentSecurityPolicy.php

@@ -0,0 +1,51 @@
+<?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 StrictInlineContentSecurityPolicy 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 is a temp helper class from the default ContentSecurityPolicy to allow slow
+ * migration to a stricter CSP. This does not allow inline styles.
+ *
+ * @package OCP\AppFramework\Http
+ * @since 14.0.0
+ */
+class StrictInlineContentSecurityPolicy extends ContentSecurityPolicy {
+
+	/**
+	 * @since 14.0.0
+	 */
+	public function __construct() {
+		$this->inlineStyleAllowed = false;
+	}
+}