489 lines
15 KiB
PHP
489 lines
15 KiB
PHP
<?php
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/**
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* StatusNet, the distributed open-source microblogging tool
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*
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* Plugin to prevent use of nicknames or URLs on a blacklist
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*
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* PHP version 5
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*
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* LICENCE: This program 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 as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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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
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* @category Action
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* @package StatusNet
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* @author Evan Prodromou <evan@status.net>
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* @copyright 2010 StatusNet Inc.
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* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
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* @link http://status.net/
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*/
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if (!defined('GNUSOCIAL')) { exit(1); }
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/**
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* Plugin to prevent use of nicknames or URLs on a blacklist
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*
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* @category Plugin
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* @package StatusNet
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* @author Evan Prodromou <evan@status.net>
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* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
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* @link http://status.net/
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*/
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class BlacklistPlugin extends Plugin
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{
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const PLUGIN_VERSION = '2.0.0';
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public $nicknames = array();
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public $urls = array();
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public $canAdmin = true;
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function _getNicknamePatterns()
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{
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$confNicknames = $this->_configArray('blacklist', 'nicknames');
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$dbNicknames = Nickname_blacklist::getPatterns();
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return array_merge($this->nicknames,
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$confNicknames,
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$dbNicknames);
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}
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function _getUrlPatterns()
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{
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$confURLs = $this->_configArray('blacklist', 'urls');
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$dbURLs = Homepage_blacklist::getPatterns();
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return array_merge($this->urls,
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$confURLs,
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$dbURLs);
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}
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/**
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* Database schema setup
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*
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* @return boolean hook value
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*/
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function onCheckSchema()
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{
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$schema = Schema::get();
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// For storing blacklist patterns for nicknames
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$schema->ensureTable('nickname_blacklist', Nickname_blacklist::schemaDef());
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$schema->ensureTable('homepage_blacklist', Homepage_blacklist::schemaDef());
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return true;
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}
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/**
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* Retrieve an array from configuration
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*
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* Carefully checks a section.
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*
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* @param string $section Configuration section
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* @param string $setting Configuration setting
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*
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* @return array configuration values
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*/
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function _configArray($section, $setting)
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{
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$config = common_config($section, $setting);
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if (empty($config)) {
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return array();
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} else if (is_array($config)) {
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return $config;
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} else if (is_string($config)) {
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return explode("\r\n", $config);
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} else {
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// TRANS: Exception thrown if the Blacklist plugin configuration is incorrect.
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// TRANS: %1$s is a configuration section, %2$s is a configuration setting.
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throw new Exception(sprintf(_m('Unknown data type for config %1$s + %2$s.'),$section, $setting));
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}
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}
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/**
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* Hook profile update to prevent blacklisted homepages or nicknames
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*
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* Throws an exception if there's a blacklisted homepage or nickname.
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*
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* @param ManagedAction $action Action being called (usually register)
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*
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* @return boolean hook value
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*/
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function onStartProfileSaveForm(ManagedAction $action)
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{
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$homepage = strtolower($action->trimmed('homepage'));
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if (!empty($homepage)) {
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if (!$this->_checkUrl($homepage)) {
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// TRANS: Validation failure for URL. %s is the URL.
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$msg = sprintf(_m("You may not use homepage \"%s\"."),
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$homepage);
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throw new ClientException($msg);
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}
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}
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$nickname = strtolower($action->trimmed('nickname'));
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if (!empty($nickname)) {
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if (!$this->_checkNickname($nickname)) {
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// TRANS: Validation failure for nickname. %s is the nickname.
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$msg = sprintf(_m("You may not use nickname \"%s\"."),
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$nickname);
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throw new ClientException($msg);
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}
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}
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return true;
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}
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/**
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* Hook notice save to prevent blacklisted urls
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*
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* Throws an exception if there's a blacklisted url in the content.
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*
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* @param Notice &$notice Notice being saved
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*
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* @return boolean hook value
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*/
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public function onStartNoticeSave(&$notice)
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{
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common_replace_urls_callback($notice->content,
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array($this, 'checkNoticeUrl'));
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return true;
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}
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/**
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* Helper callback for notice save
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*
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* Throws an exception if there's a blacklisted url in the content.
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*
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* @param string $url URL in the notice content
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*
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* @return boolean hook value
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*/
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function checkNoticeUrl($url)
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{
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// It comes in special'd, so we unspecial it
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// before comparing against patterns
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$url = htmlspecialchars_decode($url);
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if (!$this->_checkUrl($url)) {
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// TRANS: Validation failure for URL. %s is the URL.
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$msg = sprintf(_m("You may not use URL \"%s\" in notices."),
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$url);
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throw new ClientException($msg);
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}
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return $url;
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}
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/**
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* Helper for checking URLs
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*
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* Checks an URL against our patterns for a match.
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*
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* @param string $url URL to check
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*
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* @return boolean true means it's OK, false means it's bad
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*/
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private function _checkUrl($url)
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{
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$patterns = $this->_getUrlPatterns();
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foreach ($patterns as $pattern) {
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if ($pattern != '' && preg_match("/$pattern/", $url)) {
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return false;
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}
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}
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return true;
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}
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public function onUrlBlacklistTest($url)
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{
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common_debug('Checking URL against blacklist: '._ve($url));
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if (!$this->_checkUrl($url)) {
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throw new ClientException('Forbidden URL', 403);
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}
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return true;
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}
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/**
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* Helper for checking nicknames
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*
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* Checks a nickname against our patterns for a match.
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*
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* @param string $nickname nickname to check
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*
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* @return boolean true means it's OK, false means it's bad
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*/
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private function _checkNickname($nickname)
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{
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$patterns = $this->_getNicknamePatterns();
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foreach ($patterns as $pattern) {
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if ($pattern != '' && preg_match("/$pattern/", $nickname)) {
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return false;
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}
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}
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return true;
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}
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/**
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* Add our actions to the URL router
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*
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* @param URLMapper $m URL mapper for this hit
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*
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* @return boolean hook return
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*/
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public function onRouterInitialized(URLMapper $m)
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{
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$m->connect('panel/blacklist',
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['action' => 'blacklistadminpanel']);
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return true;
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}
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/**
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* Plugin version data
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*
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* @param array &$versions array of version blocks
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*
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* @return boolean hook value
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*/
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public function onPluginVersion(array &$versions): bool
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{
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$versions[] = array('name' => 'Blacklist',
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'version' => self::PLUGIN_VERSION,
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'author' => 'Evan Prodromou',
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'homepage' =>
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'https://git.gnu.io/gnu/gnu-social/tree/master/plugins/Blacklist',
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'description' =>
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// TRANS: Plugin description.
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_m('Keeps a blacklist of forbidden nickname '.
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'and URL patterns.'));
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return true;
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}
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/**
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* Determines if our admin panel can be shown
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*
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* @param string $name name of the admin panel
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* @param boolean &$isOK result
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*
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* @return boolean hook value
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*/
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function onAdminPanelCheck($name, &$isOK)
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{
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if ($name == 'blacklist') {
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$isOK = $this->canAdmin;
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return false;
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}
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return true;
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}
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/**
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* Add our tab to the admin panel
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*
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* @param Widget $nav Admin panel nav
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*
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* @return boolean hook value
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*/
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function onEndAdminPanelNav(Menu $nav)
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{
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if (AdminPanelAction::canAdmin('blacklist')) {
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$action_name = $nav->action->trimmed('action');
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$nav->out->menuItem(common_local_url('blacklistadminpanel'),
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// TRANS: Menu item in admin panel.
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_m('MENU','Blacklist'),
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// TRANS: Tooltip for menu item in admin panel.
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_m('TOOLTIP','Blacklist configuration.'),
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$action_name == 'blacklistadminpanel',
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'nav_blacklist_admin_panel');
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}
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return true;
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}
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function onEndDeleteUserForm(HTMLOutputter $out, User $user)
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{
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$scoped = $out->getScoped();
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if ($scoped === null || !$scoped->hasRight(Right::CONFIGURESITE)) {
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return true;
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}
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try {
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$profile = $user->getProfile();
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} catch (UserNoProfileException $e) {
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return true;
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}
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$out->elementStart('ul', 'form_data');
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$out->elementStart('li');
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$this->checkboxAndText($out,
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'blacklistnickname',
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// TRANS: Checkbox label in the blacklist user form.
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_m('Add this nickname pattern to blacklist'),
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'blacklistnicknamepattern',
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$this->patternizeNickname($profile->getNickname()));
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$out->elementEnd('li');
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if (!empty($profile->getHomepage())) {
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$out->elementStart('li');
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$this->checkboxAndText($out,
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'blacklisthomepage',
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// TRANS: Checkbox label in the blacklist user form.
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_m('Add this homepage pattern to blacklist'),
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'blacklisthomepagepattern',
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$this->patternizeHomepage($profile->getHomepage()));
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$out->elementEnd('li');
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}
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$out->elementEnd('ul');
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}
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function onEndDeleteUser(HTMLOutputter $out, User $user)
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{
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if ($out->boolean('blacklisthomepage')) {
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$pattern = $out->trimmed('blacklisthomepagepattern');
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Homepage_blacklist::ensurePattern($pattern);
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}
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if ($out->boolean('blacklistnickname')) {
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$pattern = $out->trimmed('blacklistnicknamepattern');
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Nickname_blacklist::ensurePattern($pattern);
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}
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return true;
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}
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function checkboxAndText(HTMLOutputter $out, $checkID, $label, $textID, $value)
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{
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$out->element('input', array('name' => $checkID,
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'type' => 'checkbox',
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'class' => 'checkbox',
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'id' => $checkID));
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$out->text(' ');
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$out->element('label', array('class' => 'checkbox',
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'for' => $checkID),
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$label);
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$out->text(' ');
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$out->element('input', array('name' => $textID,
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'type' => 'text',
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'id' => $textID,
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'value' => $value));
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}
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function patternizeNickname($nickname)
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{
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return $nickname;
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}
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function patternizeHomepage($homepage)
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{
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$hostname = parse_url($homepage, PHP_URL_HOST);
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return $hostname;
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}
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function onStartHandleFeedEntry($activity)
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{
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return $this->_checkActivity($activity);
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}
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function onStartHandleSalmon($activity)
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{
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return $this->_checkActivity($activity);
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}
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function _checkActivity($activity)
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{
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$actor = $activity->actor;
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if (empty($actor)) {
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return true;
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}
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$homepage = strtolower($actor->link);
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if (!empty($homepage)) {
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if (!$this->_checkUrl($homepage)) {
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// TRANS: Exception thrown trying to post a notice while having set a blocked homepage URL. %s is the blocked URL.
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$msg = sprintf(_m("Users from \"%s\" are blocked."),
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$homepage);
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throw new ClientException($msg);
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}
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}
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if (!empty($actor->poco)) {
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$nickname = strtolower($actor->poco->preferredUsername);
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if (!empty($nickname)) {
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if (!$this->_checkNickname($nickname)) {
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// TRANS: Exception thrown trying to post a notice while having a blocked nickname. %s is the blocked nickname.
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$msg = sprintf(_m("Notices from nickname \"%s\" are disallowed."),
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$nickname);
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throw new ClientException($msg);
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}
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}
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}
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return true;
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}
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/**
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* Check URLs and homepages for blacklisted users.
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*/
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function onStartSubscribe(Profile $subscriber, Profile $other)
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{
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foreach ([$other->getUrl(), $other->getHomepage()] as $url) {
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if (empty($url)) {
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continue;
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}
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$url = strtolower($url);
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if (!$this->_checkUrl($url)) {
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// TRANS: Client exception thrown trying to subscribe to a person with a blocked homepage or site URL. %s is the blocked URL.
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$msg = sprintf(_m("Users from \"%s\" are blocked."),
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$url);
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throw new ClientException($msg);
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}
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}
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$nickname = $other->getNickname();
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if (!empty($nickname)) {
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if (!$this->_checkNickname($nickname)) {
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// TRANS: Client exception thrown trying to subscribe to a person with a blocked nickname. %s is the blocked nickname.
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$msg = sprintf(_m("Cannot subscribe to nickname \"%s\"."),
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$nickname);
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throw new ClientException($msg);
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}
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}
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return true;
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}
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}
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