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| 1 | <?php |
| 2 | /** |
| 3 | * Title Blacklist class |
| 4 | * @author Victor Vasiliev |
| 5 | * @copyright © 2007-2010 Victor Vasiliev et al |
| 6 | * @license GPL-2.0-or-later |
| 7 | * @file |
| 8 | */ |
| 9 | |
| 10 | namespace MediaWiki\Extension\TitleBlacklist; |
| 11 | |
| 12 | use MediaWiki\Config\ConfigException; |
| 13 | use MediaWiki\Extension\AntiSpoof\AntiSpoof; |
| 14 | use MediaWiki\MediaWikiServices; |
| 15 | use MediaWiki\Parser\CoreParserFunctions; |
| 16 | use MediaWiki\Registration\ExtensionRegistry; |
| 17 | use Wikimedia\AtEase\AtEase; |
| 18 | |
| 19 | /** |
| 20 | * @ingroup Extensions |
| 21 | */ |
| 22 | |
| 23 | /** |
| 24 | * Represents a title blacklist entry |
| 25 | */ |
| 26 | class TitleBlacklistEntry { |
| 27 | /** |
| 28 | * Raw line |
| 29 | * @var string |
| 30 | */ |
| 31 | private $mRaw; |
| 32 | |
| 33 | /** |
| 34 | * Regular expression to match |
| 35 | * @var string |
| 36 | */ |
| 37 | private $mRegex; |
| 38 | |
| 39 | /** |
| 40 | * Parameters for this entry |
| 41 | * @var array |
| 42 | */ |
| 43 | private $mParams; |
| 44 | |
| 45 | /** |
| 46 | * Entry format version |
| 47 | * @var int |
| 48 | */ |
| 49 | private $mFormatVersion; |
| 50 | |
| 51 | /** |
| 52 | * Source of this entry |
| 53 | * @var string |
| 54 | */ |
| 55 | private $mSource; |
| 56 | |
| 57 | /** |
| 58 | * @param string $regex Regular expression to match |
| 59 | * @param array $params Parameters for this entry |
| 60 | * @param string $raw Raw contents of this line |
| 61 | * @param string $source |
| 62 | */ |
| 63 | private function __construct( $regex, $params, $raw, $source ) { |
| 64 | $this->mRaw = $raw; |
| 65 | $this->mRegex = $regex; |
| 66 | $this->mParams = $params; |
| 67 | $this->mFormatVersion = TitleBlacklist::VERSION; |
| 68 | $this->mSource = $source; |
| 69 | } |
| 70 | |
| 71 | /** |
| 72 | * Returns whether this entry is capable of filtering new accounts. |
| 73 | * @return bool |
| 74 | */ |
| 75 | private function filtersNewAccounts() { |
| 76 | global $wgTitleBlacklistUsernameSources; |
| 77 | |
| 78 | if ( $wgTitleBlacklistUsernameSources === '*' ) { |
| 79 | return true; |
| 80 | } |
| 81 | |
| 82 | if ( !$wgTitleBlacklistUsernameSources ) { |
| 83 | return false; |
| 84 | } |
| 85 | |
| 86 | if ( !is_array( $wgTitleBlacklistUsernameSources ) ) { |
| 87 | throw new ConfigException( |
| 88 | '$wgTitleBlacklistUsernameSources must be "*", false or an array' ); |
| 89 | } |
| 90 | |
| 91 | return in_array( $this->mSource, $wgTitleBlacklistUsernameSources, true ); |
| 92 | } |
| 93 | |
| 94 | /** |
| 95 | * Check whether a user can perform the specified action on the specified Title |
| 96 | * |
| 97 | * @param string $title Title to check |
| 98 | * @param string $action Action to check |
| 99 | * @return bool TRUE if the regex matches the title, and is not overridden |
| 100 | * else false if it doesn't match (or was overridden) |
| 101 | */ |
| 102 | public function matches( $title, $action ) { |
| 103 | if ( $title == '' ) { |
| 104 | return false; |
| 105 | } |
| 106 | |
| 107 | if ( $action === 'new-account' && !$this->filtersNewAccounts() ) { |
| 108 | return false; |
| 109 | } |
| 110 | |
| 111 | if ( isset( $this->mParams['antispoof'] ) |
| 112 | && ExtensionRegistry::getInstance()->isLoaded( 'AntiSpoof' ) |
| 113 | ) { |
| 114 | if ( $action === 'edit' ) { |
| 115 | // Use process cache for frequently edited pages |
| 116 | $cache = MediaWikiServices::getInstance()->getMainWANObjectCache(); |
| 117 | $status = $cache->getWithSetCallback( |
| 118 | $cache->makeKey( 'titleblacklist', 'normalized-unicode-status', md5( $title ) ), |
| 119 | $cache::TTL_MONTH, |
| 120 | static function () use ( $title ) { |
| 121 | return AntiSpoof::checkUnicodeStringStatus( $title ); |
| 122 | }, |
| 123 | [ 'pcTTL' => $cache::TTL_PROC_LONG ] |
| 124 | ); |
| 125 | } else { |
| 126 | $status = AntiSpoof::checkUnicodeStringStatus( $title ); |
| 127 | } |
| 128 | |
| 129 | if ( $status->isOK() ) { |
| 130 | // Remove version from return value |
| 131 | [ , $title ] = explode( ':', $status->getValue(), 2 ); |
| 132 | } else { |
| 133 | wfDebugLog( 'TitleBlacklist', 'AntiSpoof could not normalize "' . $title . '" ' . |
| 134 | $status->getMessage( false, false, 'en' )->text() . '.' |
| 135 | ); |
| 136 | } |
| 137 | } |
| 138 | |
| 139 | AtEase::suppressWarnings(); |
| 140 | // @phan-suppress-next-line SecurityCheck-ReDoS |
| 141 | $match = preg_match( |
| 142 | "/^(?:{$this->mRegex})$/us" . ( isset( $this->mParams['casesensitive'] ) ? '' : 'i' ), |
| 143 | $title |
| 144 | ); |
| 145 | AtEase::restoreWarnings(); |
| 146 | |
| 147 | if ( $match ) { |
| 148 | if ( isset( $this->mParams['moveonly'] ) && $action != 'move' ) { |
| 149 | return false; |
| 150 | } |
| 151 | if ( isset( $this->mParams['newaccountonly'] ) && $action != 'new-account' ) { |
| 152 | return false; |
| 153 | } |
| 154 | if ( !isset( $this->mParams['noedit'] ) && $action == 'edit' ) { |
| 155 | return false; |
| 156 | } |
| 157 | if ( isset( $this->mParams['reupload'] ) && $action == 'upload' ) { |
| 158 | // Special:Upload also checks 'create' permissions when not reuploading |
| 159 | return false; |
| 160 | } |
| 161 | return true; |
| 162 | } |
| 163 | |
| 164 | return false; |
| 165 | } |
| 166 | |
| 167 | /** |
| 168 | * Create a new TitleBlacklistEntry from a line of text |
| 169 | * |
| 170 | * @param string $line String containing a line of blacklist text |
| 171 | * @param string $source |
| 172 | * @return TitleBlacklistEntry|null |
| 173 | */ |
| 174 | public static function newFromString( $line, $source ) { |
| 175 | // Keep line for raw data |
| 176 | $raw = $line; |
| 177 | $options = []; |
| 178 | // Strip comments |
| 179 | $line = preg_replace( "/^\\s*([^#]*)\\s*((.*)?)$/", "\\1", $line ); |
| 180 | $line = trim( $line ); |
| 181 | // A blank string causes problems later on |
| 182 | if ( $line === '' ) { |
| 183 | return null; |
| 184 | } |
| 185 | // Parse the rest of message |
| 186 | $pockets = []; |
| 187 | if ( !preg_match( '/^(.*?)(\s*<([^<>]*)>)?$/', $line, $pockets ) ) { |
| 188 | return null; |
| 189 | } |
| 190 | $regex = trim( $pockets[1] ); |
| 191 | // We'll be matching against text form |
| 192 | $regex = str_replace( '_', ' ', $regex ); |
| 193 | $opts_str = trim( $pockets[3] ?? '' ); |
| 194 | // Parse opts |
| 195 | $opts = preg_split( '/\s*\|\s*/', $opts_str ); |
| 196 | foreach ( $opts as $opt ) { |
| 197 | $opt2 = strtolower( $opt ); |
| 198 | if ( in_array( $opt2, [ |
| 199 | 'antispoof', |
| 200 | 'autoconfirmed', |
| 201 | 'casesensitive', |
| 202 | 'moveonly', |
| 203 | 'newaccountonly', |
| 204 | 'noedit', |
| 205 | 'reupload', |
| 206 | ] ) ) { |
| 207 | $options[$opt2] = true; |
| 208 | } |
| 209 | if ( preg_match( '/errmsg\s*=\s*(.+)/i', $opt, $matches ) ) { |
| 210 | $options['errmsg'] = $matches[1]; |
| 211 | } |
| 212 | } |
| 213 | // Process magic words |
| 214 | preg_match_all( '/{{\s*([a-z]+)\s*:\s*(.+?)\s*}}/', $regex, $magicwords, PREG_SET_ORDER ); |
| 215 | foreach ( $magicwords as $mword ) { |
| 216 | switch ( strtolower( $mword[1] ) ) { |
| 217 | case 'ns': |
| 218 | $cpf_result = CoreParserFunctions::ns( |
| 219 | MediaWikiServices::getInstance()->getParser(), |
| 220 | $mword[2] |
| 221 | ); |
| 222 | if ( is_string( $cpf_result ) ) { |
| 223 | // All result will have the same value, so we can just use str_replace() |
| 224 | $regex = str_replace( $mword[0], $cpf_result, $regex ); |
| 225 | } |
| 226 | break; |
| 227 | case 'int': |
| 228 | $cpf_result = wfMessage( $mword[2] )->inContentLanguage()->text(); |
| 229 | if ( is_string( $cpf_result ) ) { |
| 230 | $regex = str_replace( $mword[0], $cpf_result, $regex ); |
| 231 | } |
| 232 | } |
| 233 | } |
| 234 | return $regex ? new TitleBlacklistEntry( $regex, $options, $raw, $source ) : null; |
| 235 | } |
| 236 | |
| 237 | /** |
| 238 | * @return string This entry's regular expression |
| 239 | */ |
| 240 | public function getRegex() { |
| 241 | return $this->mRegex; |
| 242 | } |
| 243 | |
| 244 | /** |
| 245 | * @return string This entry's raw line |
| 246 | */ |
| 247 | public function getRaw() { |
| 248 | return $this->mRaw; |
| 249 | } |
| 250 | |
| 251 | /** |
| 252 | * @return array This entry's parameters |
| 253 | */ |
| 254 | public function getParams() { |
| 255 | return $this->mParams; |
| 256 | } |
| 257 | |
| 258 | /** |
| 259 | * @return string Custom message for this entry |
| 260 | */ |
| 261 | public function getCustomMessage() { |
| 262 | return $this->mParams['errmsg'] ?? null; |
| 263 | } |
| 264 | |
| 265 | /** |
| 266 | * @return int The format version |
| 267 | */ |
| 268 | public function getFormatVersion() { |
| 269 | return $this->mFormatVersion; |
| 270 | } |
| 271 | |
| 272 | /** |
| 273 | * @param int $v New version to set |
| 274 | */ |
| 275 | public function setFormatVersion( $v ) { |
| 276 | $this->mFormatVersion = $v; |
| 277 | } |
| 278 | |
| 279 | /** |
| 280 | * Return the error message name for the blacklist entry. |
| 281 | * |
| 282 | * @param string $operation Operation name (as in titleblacklist-forbidden message name) |
| 283 | * |
| 284 | * @return string The error message name |
| 285 | */ |
| 286 | public function getErrorMessage( $operation ) { |
| 287 | $message = $this->getCustomMessage(); |
| 288 | // For grep: |
| 289 | // titleblacklist-forbidden-edit, titleblacklist-forbidden-move, |
| 290 | // titleblacklist-forbidden-upload, titleblacklist-forbidden-new-account |
| 291 | return $message ?: "titleblacklist-forbidden-{$operation}"; |
| 292 | } |
| 293 | } |