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reset_ntp_disabled_flag(); } public function uninstall() { wp_clear_scheduled_hook('wordfence_ls_ntp_cron'); Controller_Settings::shared()->reset_ntp_disabled_flag(); } public function init() { $this->_init_actions(); } public function _init_actions() { add_action('wordfence_ls_ntp_cron', array($this, '_wordfence_ls_ntp_cron')); } public function _wordfence_ls_ntp_cron() { if (Controller_Settings::shared()->get_bool(Controller_Settings::OPTION_ALLOW_DISABLING_NTP) && Controller_Settings::shared()->is_ntp_cron_disabled()) return; $ntp = self::ntp_time(); $time = time(); if ($ntp === false) { $failureCount = Controller_Settings::shared()->increment_ntp_failure_count(); if ($failureCount >= self::FAILURE_LIMIT) { Controller_Settings::shared()->set(Controller_Settings::OPTION_USE_NTP, false); Controller_Settings::shared()->set(Controller_Settings::OPTION_NTP_OFFSET, 0); } } else { Controller_Settings::shared()->reset_ntp_failure_count(); Controller_Settings::shared()->set(Controller_Settings::OPTION_USE_NTP, true); Controller_Settings::shared()->set(Controller_Settings::OPTION_NTP_OFFSET, $ntp - $time); } Controller_Settings::shared()->set(Controller_Settings::OPTION_ALLOW_DISABLING_NTP, true); } /** * Returns the current UTC timestamp, offset as needed to reflect the time retrieved from an NTP request or (if * running in the complete plugin) offset as needed from the Wordfence server's true time. * * @param bool|int $time The timestamp to apply any offset to. If `false`, it will use the current timestamp. * @return int */ public static function time($time = false) { if ($time === false) { $time = time(); } $offset = 0; if (Controller_Settings::shared()->is_ntp_enabled()) { $offset = Controller_Settings::shared()->get_int(Controller_Settings::OPTION_NTP_OFFSET); } else if (WORDFENCE_LS_FROM_CORE) { $offset = \wfUtils::normalizedTime($time) - $time; } return $time + $offset; } /** * Returns the current timestamp from ntp.org using the NTP protocol. If unable to (e.g., UDP connections are blocked), * it will return false. * * @return bool|float */ public static function ntp_time() { $servers = array('0.pool.ntp.org', '1.pool.ntp.org', '2.pool.ntp.org', '3.pool.ntp.org'); //Header - RFC 5905, page 18 $header = '00'; //LI (leap indicator) - 2 bits: 00 for "no warning" $header .= sprintf('%03d', decbin(self::NTP_VERSION)); //VN (version number) - 3 bits: 011 for version 3 $header .= '011'; //Mode (association mode) - 3 bit: 011 for "client" $packet = chr(bindec($header)); $packet .= str_repeat("\x0", 39); foreach ($servers as $s) { $socket = @fsockopen('udp://' . $s, 123, $err_no, $err_str, 1); if ($socket) { stream_set_timeout($socket, 1); $remote_originate = microtime(true); $secondsNTP = ((int) $remote_originate) + self::NTP_EPOCH_CONVERT; $fractional = sprintf('%010d', round(($remote_originate - ((int) $remote_originate)) * 0x100000000)); $packed = pack('N', $secondsNTP) . pack('N', $fractional); if (@fwrite($socket, $packet . $packed)) { $response = fread($socket, 48); $local_transmitted = microtime(true); } @fclose($socket); if (isset($response) && Model_Crypto::strlen($response) == 48) { break; } } } if (isset($response) && Model_Crypto::strlen($response) == 48) { $longs = unpack("N12", $response); $remote_originate_seconds = sprintf('%u', $longs[7]) - self::NTP_EPOCH_CONVERT; $remote_received_seconds = sprintf('%u', $longs[9]) - self::NTP_EPOCH_CONVERT; $remote_transmitted_seconds = sprintf('%u', $longs[11]) - self::NTP_EPOCH_CONVERT; $remote_originate_fraction = sprintf('%u', $longs[8]) / 0x100000000; $remote_received_fraction = sprintf('%u', $longs[10]) / 0x100000000; $remote_transmitted_fraction = sprintf('%u', $longs[12]) / 0x100000000; $remote_originate = $remote_originate_seconds + $remote_originate_fraction; $remote_received = $remote_received_seconds + $remote_received_fraction; $remote_transmitted = $remote_transmitted_seconds + $remote_transmitted_fraction; $delay = (($local_transmitted - $remote_originate) / 2) - ($remote_transmitted - $remote_received); $ntp_time = $remote_transmitted - $delay; return $ntp_time; } return false; } /** * Formats and returns the given timestamp using the time zone set for the WordPress installation. * * @param string $format See the PHP docs on DateTime for the format options. * @param int|bool $timestamp Assumed to be in UTC. If false, defaults to the current timestamp. * @return string */ public static function format_local_time($format, $timestamp = false) { if ($timestamp === false) { $timestamp = self::time(); } $utc = new \DateTimeZone('UTC'); if (!function_exists('date_timestamp_set')) { $dtStr = gmdate("c", (int) $timestamp); //Have to do it this way because of PHP 5.2 $dt = new \DateTime($dtStr, $utc); } else { $dt = new \DateTime('now', $utc); $dt->setTimestamp($timestamp); } $tz = get_option('timezone_string'); if (!empty($tz)) { $dt->setTimezone(new \DateTimeZone($tz)); } else { $gmt = get_option('gmt_offset'); if (!empty($gmt)) { if (PHP_VERSION_ID < 50510) { $dtStr = gmdate("c", (int) ($timestamp + $gmt * 3600)); //Have to do it this way because of < PHP 5.5.10 $dt = new \DateTime($dtStr, $utc); } else { $direction = ($gmt > 0 ? '+' : '-'); $gmt = abs($gmt); $h = (int) $gmt; $m = ($gmt - $h) * 60; $dt->setTimezone(new \DateTimeZone($direction . str_pad($h, 2, '0', STR_PAD_LEFT) . str_pad($m, 2, '0', STR_PAD_LEFT))); } } } return $dt->format($format); } /** * Formats a timestamp as a relative "time ago" string, optionally switching to an absolute local date format * after a threshold has elapsed. * * @param int $timestamp Assumed to be in UTC. * @param int $dateSwitchThreshold Threshold in seconds after which to show an absolute date instead. * @param string|bool $dateFormat Absolute date format. Defaults to the WP date and time formats. * @param int $maxComponents Maximum number of time components to include in relative output. * @return string */ public static function format_time_ago($timestamp, $dateSwitchThreshold = 0, $dateFormat = false, $maxComponents = 2) { if ($timestamp <= 0) { return ''; } $now = self::time(); if ($now <= $timestamp) { return __('just now', 'wordfence'); } $seconds = (int) floor($now - $timestamp); if ($dateSwitchThreshold > 0 && $seconds > $dateSwitchThreshold) { if ($dateFormat === false) { $dateFormat = get_option('date_format') . ' ' . get_option('time_format'); } return self::format_local_time($dateFormat, $timestamp); } return sprintf( __('%s ago', 'wordfence'), self::make_time_ago($seconds, $maxComponents) ); } /** * Converts a number of seconds into a display-friendly relative duration string. * * @param int $seconds * @param int $maxComponents * @return string */ public static function make_time_ago($seconds, $maxComponents = 2) { $seconds = max(0, (int) floor($seconds)); $maxComponents = max(1, (int) $maxComponents); $units = array( array('seconds' => DAY_IN_SECONDS * 30, 'singular' => '%d month', 'plural' => '%d months'), array('seconds' => DAY_IN_SECONDS, 'singular' => '%d day', 'plural' => '%d days'), array('seconds' => HOUR_IN_SECONDS, 'singular' => '%d hour', 'plural' => '%d hours'), array('seconds' => MINUTE_IN_SECONDS, 'singular' => '%d minute', 'plural' => '%d minutes'), ); $components = array(); $remaining = $seconds; foreach ($units as $unit) { if (count($components) >= $maxComponents) { break; } $value = (int) floor($remaining / $unit['seconds']); if ($value <= 0) { continue; } $components[] = sprintf(_n($unit['singular'], $unit['plural'], $value, 'wordfence'), $value); $remaining -= $value * $unit['seconds']; } if (empty($components)) { $components[] = sprintf(_n('%d second', '%d seconds', $seconds, 'wordfence'), $seconds); } else if (count($components) < $maxComponents && $remaining > 0) { $components[] = sprintf(_n('%d second', '%d seconds', $remaining, 'wordfence'), $remaining); } return implode(' ', array_slice($components, 0, $maxComponents)); } }