3 * @copyright Copyright (C) 2010-2021, the Friendica project
5 * @license GNU AGPL version 3 or any later version
7 * This program is free software: you can redistribute it and/or modify
8 * it under the terms of the GNU Affero General Public License as
9 * published by the Free Software Foundation, either version 3 of the
10 * License, or (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU Affero General Public License for more details.
17 * You should have received a copy of the GNU Affero General Public License
18 * along with this program. If not, see <https://www.gnu.org/licenses/>.
24 use Friendica\Capabilities\ICanHandleRequests;
25 use Friendica\Core\Logger;
26 use Friendica\Model\User;
29 * All modules in Friendica should extend BaseModule, although not all modules
30 * need to extend all the methods described here
32 * The filename of the module in src/Module needs to match the class name
33 * exactly to make the module available.
35 * @author Hypolite Petovan <hypolite@mrpetovan.com>
37 abstract class BaseModule implements ICanHandleRequests
40 protected $parameters = [];
42 public function __construct(array $parameters = [])
44 $this->parameters = $parameters;
50 public function init()
57 public function rawContent()
66 public function content(): string
74 public function delete()
81 public function patch()
88 public function post()
90 // DI::baseurl()->redirect('module');
96 public function afterpost()
103 public function put()
107 /** Gets the name of the current class */
108 public function getClassName(): string
110 return static::class;
114 * Functions used to protect against Cross-Site Request Forgery
115 * The security token has to base on at least one value that an attacker can't know - here it's the session ID and the private key.
116 * In this implementation, a security token is reusable (if the user submits a form, goes back and resubmits the form, maybe with small changes;
117 * or if the security token is used for ajax-calls that happen several times), but only valid for a certain amount of time (3hours).
118 * The "typename" separates the security tokens of different types of forms. This could be relevant in the following case:
119 * A security token is used to protect a link from CSRF (e.g. the "delete this profile"-link).
120 * If the new page contains by any chance external elements, then the used security token is exposed by the referrer.
121 * Actually, important actions should not be triggered by Links / GET-Requests at all, but sometimes they still are,
122 * so this mechanism brings in some damage control (the attacker would be able to forge a request to a form of this type, but not to forms of other types).
124 public static function getFormSecurityToken($typename = '')
126 $user = User::getById(DI::app()->getLoggedInUserId(), ['guid', 'prvkey']);
128 $sec_hash = hash('whirlpool', ($user['guid'] ?? '') . ($user['prvkey'] ?? '') . session_id() . $timestamp . $typename);
130 return $timestamp . '.' . $sec_hash;
133 public static function checkFormSecurityToken($typename = '', $formname = 'form_security_token')
137 if (!empty($_REQUEST[$formname])) {
138 /// @TODO Careful, not secured!
139 $hash = $_REQUEST[$formname];
142 if (!empty($_SERVER['HTTP_X_CSRF_TOKEN'])) {
143 /// @TODO Careful, not secured!
144 $hash = $_SERVER['HTTP_X_CSRF_TOKEN'];
151 $max_livetime = 10800; // 3 hours
153 $user = User::getById(DI::app()->getLoggedInUserId(), ['guid', 'prvkey']);
155 $x = explode('.', $hash);
156 if (time() > (intval($x[0]) + $max_livetime)) {
160 $sec_hash = hash('whirlpool', ($user['guid'] ?? '') . ($user['prvkey'] ?? '') . session_id() . $x[0] . $typename);
162 return ($sec_hash == $x[1]);
165 public static function getFormSecurityStandardErrorMessage()
167 return DI::l10n()->t("The form security token was not correct. This probably happened because the form has been opened for too long \x28>3 hours\x29 before submitting it.") . EOL;
170 public static function checkFormSecurityTokenRedirectOnError($err_redirect, $typename = '', $formname = 'form_security_token')
172 if (!self::checkFormSecurityToken($typename, $formname)) {
173 Logger::notice('checkFormSecurityToken failed: user ' . DI::app()->getLoggedInUserNickname() . ' - form element ' . $typename);
174 Logger::debug('checkFormSecurityToken failed', ['request' => $_REQUEST]);
175 notice(self::getFormSecurityStandardErrorMessage());
176 DI::baseUrl()->redirect($err_redirect);
180 public static function checkFormSecurityTokenForbiddenOnError($typename = '', $formname = 'form_security_token')
182 if (!self::checkFormSecurityToken($typename, $formname)) {
183 Logger::notice('checkFormSecurityToken failed: user ' . DI::app()->getLoggedInUserNickname() . ' - form element ' . $typename);
184 Logger::debug('checkFormSecurityToken failed', ['request' => $_REQUEST]);
186 throw new \Friendica\Network\HTTPException\ForbiddenException();
190 protected static function getContactFilterTabs(string $baseUrl, string $current, bool $displayCommonTab)
194 'label' => DI::l10n()->t('All contacts'),
195 'url' => $baseUrl . '/contacts',
196 'sel' => !$current || $current == 'all' ? 'active' : '',
199 'label' => DI::l10n()->t('Followers'),
200 'url' => $baseUrl . '/contacts/followers',
201 'sel' => $current == 'followers' ? 'active' : '',
204 'label' => DI::l10n()->t('Following'),
205 'url' => $baseUrl . '/contacts/following',
206 'sel' => $current == 'following' ? 'active' : '',
209 'label' => DI::l10n()->t('Mutual friends'),
210 'url' => $baseUrl . '/contacts/mutuals',
211 'sel' => $current == 'mutuals' ? 'active' : '',
215 if ($displayCommonTab) {
217 'label' => DI::l10n()->t('Common'),
218 'url' => $baseUrl . '/contacts/common',
219 'sel' => $current == 'common' ? 'active' : '',