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| 1 | <?php |
| 2 | /** |
| 3 | * This program is free software; you can redistribute it and/or modify |
| 4 | * it under the terms of the GNU General Public License as published by |
| 5 | * the Free Software Foundation; either version 2 of the License, or |
| 6 | * (at your option) any later version. |
| 7 | * |
| 8 | * This program is distributed in the hope that it will be useful, |
| 9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 11 | * GNU General Public License for more details. |
| 12 | * |
| 13 | * You should have received a copy of the GNU General Public License along |
| 14 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 15 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
| 16 | * http://www.gnu.org/copyleft/gpl.html |
| 17 | * |
| 18 | * @file |
| 19 | */ |
| 20 | namespace MediaWiki\Extension\AbuseFilter\BlockedDomains; |
| 21 | |
| 22 | use MediaWiki\CheckUser\Services\CheckUserInsert; |
| 23 | use MediaWiki\Extension\AbuseFilter\Variables\UnsetVariableException; |
| 24 | use MediaWiki\Extension\AbuseFilter\Variables\VariableHolder; |
| 25 | use MediaWiki\Extension\AbuseFilter\Variables\VariablesManager; |
| 26 | use MediaWiki\Logging\LogPage; |
| 27 | use MediaWiki\Logging\ManualLogEntry; |
| 28 | use MediaWiki\MediaWikiServices; |
| 29 | use MediaWiki\Message\Message; |
| 30 | use MediaWiki\Page\PageReference; |
| 31 | use MediaWiki\Registration\ExtensionRegistry; |
| 32 | use MediaWiki\Status\Status; |
| 33 | use MediaWiki\User\UserIdentity; |
| 34 | |
| 35 | /** |
| 36 | * Filters blocked domains |
| 37 | * |
| 38 | * @ingroup SpecialPage |
| 39 | */ |
| 40 | class BlockedDomainFilter implements IBlockedDomainFilter { |
| 41 | public function __construct( |
| 42 | private readonly VariablesManager $variablesManager, |
| 43 | private readonly IBlockedDomainStorage $blockedDomainStorage |
| 44 | ) { |
| 45 | } |
| 46 | |
| 47 | /** @inheritDoc */ |
| 48 | public function filter( VariableHolder $vars, UserIdentity $user, PageReference $title ): Status { |
| 49 | // whether the feature is enabled is checked in ServiceWiring |
| 50 | |
| 51 | $status = Status::newGood(); |
| 52 | try { |
| 53 | $urls = $this->variablesManager->getVar( $vars, 'added_links', VariablesManager::GET_STRICT ); |
| 54 | } catch ( UnsetVariableException ) { |
| 55 | return $status; |
| 56 | } |
| 57 | |
| 58 | $addedDomains = []; |
| 59 | foreach ( $urls->toArray() as $addedUrl ) { |
| 60 | $parsedHost = parse_url( (string)$addedUrl->getData(), PHP_URL_HOST ); |
| 61 | if ( !is_string( $parsedHost ) ) { |
| 62 | continue; |
| 63 | } |
| 64 | $parsedHost = strtolower( $parsedHost ); |
| 65 | $addedDomains[$parsedHost] = true; |
| 66 | // Given that we block subdomains of blocked domains too |
| 67 | // pretend that all the higher-level domains are added as well |
| 68 | // so for foo.bar.com, you will have three domains to check: |
| 69 | // foo.bar.com, bar.com, and com |
| 70 | // This saves string search in the large list of blocked domains |
| 71 | // making it much faster. |
| 72 | $pos = 0; |
| 73 | // phpcs:ignore Generic.CodeAnalysis.AssignmentInCondition |
| 74 | while ( ( $pos = strpos( $parsedHost, '.', $pos ) ) !== false ) { |
| 75 | // Skip the dot we just found |
| 76 | $pos++; |
| 77 | // It should be a map, benchmark at https://phabricator.wikimedia.org/P48956 |
| 78 | $addedDomains[ substr( $parsedHost, $pos ) ] = true; |
| 79 | } |
| 80 | } |
| 81 | if ( !$addedDomains ) { |
| 82 | return $status; |
| 83 | } |
| 84 | $blockedDomains = $this->blockedDomainStorage->loadComputed(); |
| 85 | $blockedDomainsAdded = array_intersect_key( $addedDomains, $blockedDomains ); |
| 86 | if ( !$blockedDomainsAdded ) { |
| 87 | return $status; |
| 88 | } |
| 89 | $blockedDomainsAdded = array_keys( $blockedDomainsAdded ); |
| 90 | $error = Message::newFromSpecifier( 'abusefilter-blocked-domains-attempted' ); |
| 91 | $error->params( Message::listParam( $blockedDomainsAdded ) ); |
| 92 | $status->fatal( $error ); |
| 93 | $this->logFilterHit( |
| 94 | $user, |
| 95 | $title, |
| 96 | implode( ' ', $blockedDomainsAdded ) |
| 97 | ); |
| 98 | return $status; |
| 99 | } |
| 100 | |
| 101 | /** |
| 102 | * Logs the filter hit to Special:Log |
| 103 | * |
| 104 | * @param UserIdentity $user |
| 105 | * @param PageReference $title |
| 106 | * @param string $blockedDomain The blocked domain the user attempted to add |
| 107 | */ |
| 108 | private function logFilterHit( UserIdentity $user, PageReference $title, string $blockedDomain ) { |
| 109 | $logEntry = new ManualLogEntry( 'abusefilterblockeddomainhit', 'hit' ); |
| 110 | $logEntry->setPerformer( $user ); |
| 111 | $logEntry->setTarget( $title ); |
| 112 | $logEntry->setParameters( [ '4::blocked' => $blockedDomain ] ); |
| 113 | $logid = $logEntry->insert(); |
| 114 | $log = new LogPage( 'abusefilterblockeddomainhit' ); |
| 115 | if ( $log->isRestricted() ) { |
| 116 | // Make sure checkusers can see this action if the log is restricted |
| 117 | // (which is the default) |
| 118 | if ( ExtensionRegistry::getInstance()->isLoaded( 'CheckUser' ) ) { |
| 119 | $rc = $logEntry->getRecentChange( $logid ); |
| 120 | /** @var CheckUserInsert $checkUserInsert */ |
| 121 | $checkUserInsert = MediaWikiServices::getInstance()->get( 'CheckUserInsert' ); |
| 122 | $checkUserInsert->updateCheckUserData( $rc ); |
| 123 | } |
| 124 | } else { |
| 125 | // If the log is unrestricted, publish normally to RC, |
| 126 | // which will also update checkuser |
| 127 | $logEntry->publish( $logid, "rc" ); |
| 128 | } |
| 129 | } |
| 130 | } |
| 131 | |
| 132 | // @deprecated since 1.44 |
| 133 | class_alias( BlockedDomainFilter::class, 'MediaWiki\Extension\AbuseFilter\BlockedDomainFilter' ); |