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