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getBrowser($UA); if (!$b || $b['Parent'] == 'DefaultProperties') { $IP = wfUtils::getIP(); return !wfLog::isHumanRequest($IP, $UA); } else if (isset($b['Crawler']) && $b['Crawler']) { return true; } return false; } public static function verifyCrawlerPTR($hostPattern, $IP){ $table = wfDB::networkTable('wfCrawlers'); $db = new wfDB(); $IPn = wfUtils::inet_pton($IP); $ipHex = wfDB::binaryValueToSQLHex($IPn); $status = $db->querySingle("select status from $table where IP={$ipHex} and patternSig=UNHEX(MD5('%s')) and lastUpdate > unix_timestamp() - %d", $hostPattern, WORDFENCE_CRAWLER_VERIFY_CACHE_TIME); if($status){ if($status == 'verified'){ return true; } else { return false; } } $host = wfUtils::reverseLookup($IP); if(! $host){ $db->queryWrite("insert into $table (IP, patternSig, status, lastUpdate, PTR) values ({$ipHex}, UNHEX(MD5('%s')), '%s', unix_timestamp(), '%s') ON DUPLICATE KEY UPDATE status='%s', lastUpdate=unix_timestamp(), PTR='%s'", $hostPattern, 'noPTR', '', 'noPTR', ''); return false; } if(preg_match($hostPattern, $host)){ $resultIPs = wfUtils::resolveDomainName($host); $addrsMatch = false; foreach($resultIPs as $resultIP){ if($resultIP == $IP){ $addrsMatch = true; break; } } if($addrsMatch){ $db->queryWrite("insert into $table (IP, patternSig, status, lastUpdate, PTR) values ({$ipHex}, UNHEX(MD5('%s')), '%s', unix_timestamp(), '%s') ON DUPLICATE KEY UPDATE status='%s', lastUpdate=unix_timestamp(), PTR='%s'", $hostPattern, 'verified', $host, 'verified', $host); return true; } else { $db->queryWrite("insert into $table (IP, patternSig, status, lastUpdate, PTR) values ({$ipHex}, UNHEX(MD5('%s')), '%s', unix_timestamp(), '%s') ON DUPLICATE KEY UPDATE status='%s', lastUpdate=unix_timestamp(), PTR='%s'", $hostPattern, 'fwdFail', $host, 'fwdFail', $host); return false; } } else { $db->queryWrite("insert into $table (IP, patternSig, status, lastUpdate, PTR) values ({$ipHex}, UNHEX(MD5('%s')), '%s', unix_timestamp(), '%s') ON DUPLICATE KEY UPDATE status='%s', lastUpdate=unix_timestamp(), PTR='%s'", $hostPattern, 'badPTR', $host, 'badPTR', $host); return false; } } public static function isGooglebot($userAgent = null){ if ($userAgent === null) { $userAgent = isset($_SERVER['HTTP_USER_AGENT']) ? $_SERVER['HTTP_USER_AGENT'] : ''; } return (bool) preg_match('/Googlebot\/\d\.\d/', $userAgent); } public static function isGoogleCrawler($userAgent = null){ if ($userAgent === null) { $userAgent = isset($_SERVER['HTTP_USER_AGENT']) ? $_SERVER['HTTP_USER_AGENT'] : ''; } foreach (self::$googPat as $pat) { if (preg_match($pat . 'i', $userAgent)) { return true; } } return false; } private static $googPat = array( '@^Mozilla/5\\.0 \\(.*Google Keyword Tool.*\\)$@', '@^Mozilla/5\\.0 \\(.*Feedfetcher\\-Google.*\\)$@', '@^Feedfetcher\\-Google\\-iGoogleGadgets.*$@', '@^searchbot admin\\@google\\.com$@', '@^Google\\-Site\\-Verification.*$@', '@^Google OpenSocial agent.*$@', '@^.*Googlebot\\-Mobile/2\\..*$@', '@^AdsBot\\-Google\\-Mobile.*$@', '@^google \\(.*Enterprise.*\\)$@', '@^Mediapartners\\-Google.*$@', '@^GoogleFriendConnect.*$@', '@^googlebot\\-urlconsole$@', '@^.*Google Web Preview.*$@', '@^Feedfetcher\\-Google.*$@', '@^AppEngine\\-Google.*$@', '@^Googlebot\\-Video.*$@', '@^Googlebot\\-Image.*$@', '@^Google\\-Sitemaps.*$@', '@^Googlebot/Test.*$@', '@^Googlebot\\-News.*$@', '@^.*Googlebot/2\\.1.*$@', '@^AdsBot\\-Google.*$@', '@^Google$@' ); /** * Has correct user agent and PTR record points to .googlebot.com domain. * * @param string|null $ip * @param string|null $ua * @return bool */ public static function isVerifiedGoogleCrawler($ip = null, $ua = null) { static $verified; if (!isset($verified)) { $verified = array(); } if ($ip === null) { $ip = wfUtils::getIP(); } if ($ip === null || $ip === false) { //Likely a CLI execution return false; } if (array_key_exists($ip, $verified)) { return $verified[$ip]; } if (self::isGoogleCrawler($ua)) { $services = wfUtils::whitelistPresets(); if (array_key_exists('google', $services)) { $ranges = $services['google']['r']; foreach ($ranges as $r) { if (wfUtils::subnetContainsIP($r, $ip)) { $verified[$ip] = true; return $verified[$ip]; } } } if (self::verifyCrawlerPTR(wordfence::getLog()->getGooglePattern(), $ip)) { $verified[$ip] = true; return $verified[$ip]; } $noc1Status = self::verifyGooglebotViaNOC1($ip); if ($noc1Status == self::GOOGLE_BOT_VERIFIED) { $verified[$ip] = true; return $verified[$ip]; } else if ($noc1Status == self::GOOGLE_BOT_FAKE) { $verified[$ip] = false; return $verified[$ip]; } if (!array_key_exists('google', $services)) { return true; //We were unable to successfully validate Googlebot status so default to being permissive if the service IP list is missing } } $verified[$ip] = false; return $verified[$ip]; } /** * Attempts to verify whether an IP claiming to be Googlebot is actually Googlebot. * * @param string|null $ip * @return string */ public static function verifyGooglebotViaNOC1($ip = null) { $table = wfDB::networkTable('wfCrawlers'); if ($ip === null) { $ip = wfUtils::getIP(); } $db = new wfDB(); $IPn = wfUtils::inet_pton($ip); $ipHex = wfDB::binaryValueToSQLHex($IPn); $patternSig = 'googlenoc1'; $status = $db->querySingle("select status from $table where IP={$ipHex} and patternSig=UNHEX(MD5('%s')) and lastUpdate > unix_timestamp() - %d", $patternSig, WORDFENCE_CRAWLER_VERIFY_CACHE_TIME); if ($status === 'verified') { return self::GOOGLE_BOT_VERIFIED; } else if ($status === 'fakeBot') { return self::GOOGLE_BOT_FAKE; } $api = new wfAPI(wfConfig::get('apiKey'), wfUtils::getWPVersion()); try { $data = $api->call('verify_googlebot', array( 'ip' => $ip, )); if (is_array($data) && !empty($data['verified'])) { // Cache results $db->queryWrite("INSERT INTO {$table} (IP, patternSig, status, lastUpdate) VALUES ({$ipHex}, UNHEX(MD5('%s')), '%s', unix_timestamp()) ON DUPLICATE KEY UPDATE status = VALUES(status), lastUpdate = VALUES(lastUpdate)", $patternSig, 'verified'); return self::GOOGLE_BOT_VERIFIED; } else { $db->queryWrite("INSERT INTO {$table} (IP, patternSig, status, lastUpdate) VALUES ({$ipHex}, UNHEX(MD5('%s')), '%s', unix_timestamp()) ON DUPLICATE KEY UPDATE status = VALUES(status), lastUpdate = VALUES(lastUpdate)", $patternSig, 'fakeBot'); self::GOOGLE_BOT_FAKE; } } catch (Exception $e) { // Do nothing, bail } return self::GOOGLE_BOT_UNDETERMINED; } }