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<?php /** * Handles core integrity scan. * * @package WP_Defender\Behavior\Scan / namespace WP_Defender\Behavior\Scan; use ArrayIterator; use WP_Defender\Traits\IO; use WP_Defender\Model\Scan; use Calotes\Component\Behavior; use WP_Defender\Model\Scan_Item; use WP_Defender\Component\Timer; use WP_Defender\Helper\Analytics\Scan as Scan_Analytics; use WP_Defender\Controller\Scan as Scan_Controller; /* * Handles core integrity scan. / class Core_Integrity extends Behavior { use IO; public const CACHE_CHECKSUMS = 'wd_cache_checksums', ISSUE_CHECKSUMS = 'wd_issue_checksums'; /* * Check that the folder is empty. * * @param string $path The path to check. * * @return bool / protected function is_dir_empty( $path ) { $rfiles = scandir( $path ); foreach ( $rfiles as $rfile ) { if ( ! in_array( $rfile, array( '.', '..' ), true ) ) { return false; } } return true; } /* * Check if the core file is on touch. * * @return bool / public function core_integrity_check(): bool { $checksums = $this->get_checksum(); if ( false === $checksums ) { return false; } $core_files = get_site_option( Gather_Fact::CACHE_CORE, array() ); $core_files = new ArrayIterator( $core_files ); $timer = new Timer(); $model = $this->owner->scan; $pos = (int) $model->task_checkpoint; if ( $pos > 0 ) { $core_files->seek( $pos ); } $this->log( sprintf( 'current pos %s', $pos ), Scan_Controller::SCAN_LOG ); while ( $core_files->valid() ) { if ( ! $timer->check() ) { $reason = 'break out cause too long'; /* * Retrieves an instance of the Scan_Analytics class. * * @var Scan_Analytics $scan_analytics / $scan_analytics = wd_di()->get( Scan_Analytics::class ); $scan_analytics->track_feature( $scan_analytics::EVENT_SCAN_FAILED, array( $scan_analytics::EVENT_SCAN_FAILED_PROP => $scan_analytics::EVENT_SCAN_FAILED_ERROR, 'Error_Reason' => $reason, ) ); $this->log( $reason, Scan_Controller::SCAN_LOG ); break; } if ( $model->is_issue_whitelisted( $core_files->current() ) ) { // This is whitelisted, so do nothing. $this->log( sprintf( 'skip %s because of file is whitelisted', $core_files->current() ), Scan_Controller::SCAN_LOG ); $core_files->next(); continue; } if ( $model->is_issue_ignored( $core_files->current() ) ) { // This is ignored, so do nothing. $this->log( sprintf( 'skip %s because of file is ignored', $core_files->current() ), Scan_Controller::SCAN_LOG ); $core_files->next(); continue; } $file = $core_files->current(); // Get relative so we can compare. $abs_path = defender_replace_line( ABSPATH ); $rev_file = str_replace( $abs_path, '', $file ); // Remove directory separator on the left. $rev_file = ltrim( $rev_file, DIRECTORY_SEPARATOR ); if ( isset( $checksums[ $rev_file ] ) ) { if ( ! $this->compare_hashes( $file, $checksums[ $rev_file ] ) ) { $this->log( sprintf( 'modified %s', $file ), Scan_Controller::SCAN_LOG ); $model->add_item( Scan_Item::TYPE_INTEGRITY, array( 'file' => $file, 'type' => 'modified', ) ); } } else { if ( is_dir( $file ) ) { if ( $this->is_dir_empty( $core_files->current() ) ) { $this->log( sprintf( 'skip %s because of non-WP directory is empty', $core_files->current() ), Scan_Controller::SCAN_LOG ); $core_files->next(); continue; } $item_type = 'dir'; } else { $item_type = 'unversion'; } $model->add_item( Scan_Item::TYPE_INTEGRITY, array( 'file' => $file, 'type' => $item_type, ) ); } $model->calculate_percent( $core_files->key() 100 / $core_files->count(), 2 ); if ( 0 === $core_files->key() % 100 ) { // We should update the model percent each 100 files, so we have some progress ont he screen$pos * 100 / $core_files->count(). $model->save(); } $core_files->next(); } if ( $core_files->valid() ) { // Save the current progress and quit. $model->task_checkpoint = $core_files->key(); } else { // We will check if we have any ignore issue from last scan, so we can bring it here. $last = Scan::get_last(); if ( is_object( $last ) ) { $ignored_issues = $last->get_issues( Scan_Item::TYPE_INTEGRITY, Scan_Item::STATUS_IGNORE ); foreach ( $ignored_issues as $issue ) { $model->add_item( Scan_Item::TYPE_INTEGRITY, $issue->raw_data, Scan_Item::STATUS_IGNORE ); } } // Done, reset this, so we can use it later. $model->task_checkpoint = ''; } $model->save(); return ! $core_files->valid(); } /** * Fetch the checksums. * * @return bool\|array / protected function get_checksum() { $cache = get_site_option( self::CACHE_CHECKSUMS, false ); if ( is_array( $cache ) ) { return $cache; } $this->log( 'Fetch checksums, should only once', Scan_Controller::SCAN_LOG ); global $wp_version, $wp_local_package; if ( ! function_exists( 'get_core_checksums' ) ) { include_once ABSPATH . 'wp-admin/includes/update.php'; } $checksums = get_core_checksums( $wp_version, empty( $wp_local_package ) ? 'en_US' : $wp_local_package ); if ( false === $checksums ) { $this->log( 'Error from fetching checksums from wp.org', Scan_Controller::SCAN_LOG ); $scan = $this->owner->scan; $scan->status = Scan::STATUS_IDLE; $scan->save(); update_site_option( self::ISSUE_CHECKSUMS, time() ); // We can't send to MP event now because the Scan process continues to ping wp.org. This can cause a event's surge. return false; } if ( isset( $checksums[ $wp_version ] ) ) { /* * Sometimes the API returns the format [$wp_version]=>'...' when locale not right. * Use this as fail-safe. */ $checksums = $checksums[ $wp_version ]; } if ( is_array( $checksums ) ) { foreach ( $checksums as $key => $checksum ) { $formatted_key = defender_replace_line( $key ); if ( $key !== $formatted_key ) { $checksums[ $formatted_key ] = $checksum; unset( $checksums[ $key ] ); } } } update_site_option( self::CACHE_CHECKSUMS, $checksums ); return $checksums; } }

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