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<?php |
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|
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// Do not allow the file to be called directly. |
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if ( ! defined( 'ABSPATH' ) ) { |
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exit; |
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} |
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|
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/** |
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* This class is used to perform interactions with the |
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* .htaccess file. |
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*/ |
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class P_Htaccess extends P_Core { |
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|
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/** |
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* Add the actions required for htaccess interactions. |
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* |
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* @param Patchstack $core |
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* @return void |
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*/ |
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public function __construct( $core ) { |
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parent::__construct( $core ); |
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|
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if ( $this->get_option( 'patchstack_license_free', 0 ) == 1 ) { |
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return; |
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} |
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|
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add_action( 'updated_option', array( $this, 'update_option_extras' ), 10, 3 ); |
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} |
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|
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/** |
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* If option is updated, write to .htaccess file. |
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* |
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* @param string $option_name |
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* @param string $option_name |
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* @param mixed $value |
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* @return void |
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*/ |
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public function update_option_extras( $option_name, $old_value, $value ) { |
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if ( in_array( $option_name, array( 'patchstack_prevent_default_file_access', 'patchstack_basic_firewall', 'patchstack_pingback_protection', 'patchstack_block_debug_log_access', 'patchstack_block_fake_bots', 'patchstack_index_views', 'patchstack_trace_and_track', 'patchstack_proxy_comment_posting', 'patchstack_image_hotlinking', 'patchstack_firewall_custom_rules' ) ) ) { |
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$this->plugin->rules->post_firewall_rules(); |
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} |
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} |
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|
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/** |
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* Get the turned on .htaccess firewall settings. |
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* |
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* @return array |
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*/ |
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public function get_firewall_rule_settings() { |
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$settings = array(); |
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$options = array( 'patchstack_prevent_default_file_access', 'patchstack_basic_firewall', 'patchstack_block_debug_log_access', 'patchstack_block_fake_bots', 'patchstack_index_views', 'patchstack_proxy_comment_posting', 'patchstack_image_hotlinking', 'patchstack_basicscanblock' ); |
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foreach ( $options as $option ) { |
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if ( get_site_option( $option ) ) { |
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$settings[] = ( $option == 'patchstack_basicscanblock' ? 'webarx_wpscan_block' : str_replace( 'patchstack_', 'webarx_', $option ) ); |
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} |
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} |
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|
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return $settings; |
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} |
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|
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/** |
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* Determine the current state of the firewall. |
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* |
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* @return boolean |
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*/ |
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public function firewall() { |
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// Get the firewall state. |
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$sum_of_firewall = 0; |
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foreach ( array( 'patchstack_prevent_default_file_access', 'patchstack_basic_firewall', 'patchstack_pingback_protection', 'patchstack_block_debug_log_access', 'patchstack_block_fake_bots', 'patchstack_index_views', 'patchstack_trace_and_track', 'patchstack_proxy_comment_posting', 'patchstack_image_hotlinking' ) as $option ) { |
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$value = get_site_option( $option, 0 ); |
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$sum_of_firewall += empty( $value ) ? 0 : 1; |
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} |
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|
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// Update the options. |
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$onoff = $sum_of_firewall > 1 ? 0 : 1; |
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foreach ( array( 'patchstack_prevent_default_file_access', 'patchstack_basic_firewall', 'patchstack_block_debug_log_access', 'patchstack_index_views', 'patchstack_proxy_comment_posting' ) as $option ) { |
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update_site_option( $option, $onoff ); |
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} |
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update_site_option( 'patchstack_block_fake_bots', 0 ); |
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update_site_option( 'patchstack_image_hotlinking', 0 ); |
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|
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// Pull the rules or cleanup the .htaccess file? |
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if ( $onoff == 1 ) { |
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$this->plugin->rules->post_firewall_rules(); |
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} else { |
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$this->cleanup_htaccess_file(); |
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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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* Write the .htaccess firewall rules to the .htaccess file. |
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* |
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* @param string $rules |
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* @return void |
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*/ |
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public function write_rules_to_htaccess( $rules = '' ) { |
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if ( ! $this->is_server_supported() || get_site_option( 'patchstack_disable_htaccess', 0 ) ) { |
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return false; |
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} |
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|
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// Determine if the .htaccess file exists. |
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require_once ABSPATH . 'wp-admin/includes/class-wp-filesystem-base.php'; |
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require_once ABSPATH . 'wp-admin/includes/class-wp-filesystem-direct.php'; |
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$fs = new WP_Filesystem_Direct( '' ); |
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if ( ! $fs->exists( ABSPATH . '.htaccess' ) ) { |
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$fs->touch( ABSPATH . '.htaccess' ); |
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|
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// Don't continue if .htaccess does not exist or cannot be written to. |
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if ( ! $fs->exists( ABSPATH . '.htaccess' ) ) { |
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return false; |
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} |
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} |
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|
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// Get the current rules. |
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$current = $old = $fs->get_contents( ABSPATH . '.htaccess' ); |
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$current = $this->delete_all_between( '# Patchstack Firewall Start', "# Patchstack Firewall End\r\n", $current ); |
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|
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// If no rules, then we delete the old ones. |
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if ( $rules != '' ) { |
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$current = "# Patchstack Firewall Start\r\n<IfModule mod_rewrite.c>\r\nRewriteEngine On\r\n" . $rules . "\r\n</IfModule>\r\n# Patchstack Firewall End\r\n" . $current; |
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} |
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|
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// Put the contents into the .htaccess file. |
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$fs->put_contents( ABSPATH . '.htaccess', $current, FS_CHMOD_FILE ); |
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|
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// Check if the new rules work. |
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// 500 internal server error - did not work. Restore old rules. |
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$status = $this->get_site_status_code(); |
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if ( $status == '' || $status >= 500 ) { |
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$fs->put_contents( ABSPATH . '.htaccess', $old, FS_CHMOD_FILE ); |
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return false; |
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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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* Write given rules to the .htaccess file. |
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* |
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* @param string $rules |
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* @return boolean |
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*/ |
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public function write_to_htaccess( $rules = '' ) { |
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if ( ! $this->is_server_supported() || get_site_option( 'patchstack_disable_htaccess', 0 ) ) { |
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return false; |
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} |
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|
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require_once ABSPATH . 'wp-admin/includes/class-wp-filesystem-base.php'; |
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require_once ABSPATH . 'wp-admin/includes/class-wp-filesystem-direct.php'; |
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$fs = new WP_Filesystem_Direct( '' ); |
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if ( ! $fs->exists( ABSPATH . '.htaccess' ) ) { |
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$fs->touch( ABSPATH . '.htaccess' ); |
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} |
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|
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return $this->plugin->htaccess->self_check( $rules ); |
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} |
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|
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/** |
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* Get the web-server type. |
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* |
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* @return boolean |
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*/ |
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public function is_server_supported() { |
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$server = strtolower( filter_var( $_SERVER['SERVER_SOFTWARE'], FILTER_SANITIZE_STRING ) ); |
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foreach ( array( 'apache', 'nginx', 'litespeed' ) as $webserver ) { |
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if ( strstr( $server, $webserver ) ) { |
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return true; |
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} |
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} |
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|
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return false; |
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} |
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|
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/** |
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* Write .htaccess directly without causing a server missconfiguration (500) |
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* (PHP will end the process even if the browser-window was closed.) |
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* |
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* @param string $new_rules |
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* @return boolean |
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*/ |
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public function self_check( $new_rules ) { |
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// Don't continue if we have no rules |
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if ( empty( $new_rules ) ) { |
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return false; |
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} |
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$new_rules = PHP_EOL . PHP_EOL . '# BEGIN Patchstack' . PHP_EOL . $new_rules . PHP_EOL . '# END Patchstack' . PHP_EOL . PHP_EOL; |
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|
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// Require the filesystem libraries. |
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require_once ABSPATH . 'wp-admin/includes/class-wp-filesystem-base.php'; |
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require_once ABSPATH . 'wp-admin/includes/class-wp-filesystem-direct.php'; |
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$fs = new WP_Filesystem_Direct( '' ); |
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|
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// Don't continue if .htaccess does not exist or cannot be written to. |
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if ( ! $fs->exists( ABSPATH . '.htaccess' ) ) { |
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return false; |
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} |
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|
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// Get the current data in the .htaccess file. |
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$current_rules = $old = $fs->get_contents( ABSPATH . '.htaccess' ); |
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|
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// Delete all Patchstack related stuff so we can properly re-inject it. |
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$current_rules = $this->delete_all_between( '# BEGIN WebARX', '# END WebARX', $current_rules ); |
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$current_rules = $this->delete_all_between( '# BEGIN Patchstack', '# END Patchstack', $current_rules ); |
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$current_rules = $this->delete_all_between( '# CUSTOM WEBARX RULES', '# END CUSTOM WEBARX RULES', $current_rules ); |
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$current_rules = $this->delete_all_between( '# CUSTOM PATCHSTACK RULES', '# END CUSTOM PATCHSTACK RULES', $current_rules ); |
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$new_rules = $this->delete_all_between( '# BEGIN WordPress', '# END WordPress', $new_rules ); |
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|
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// Get the custom .htaccess rules, if any are set. |
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$custom = $this->get_custom_rules(); |
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|
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if ( get_site_option( 'patchstack_firewall_custom_rules_loc', 'bottom' ) == 'top' ) { |
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$new_rules = $custom . $new_rules; |
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} else { |
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$new_rules = $new_rules . $custom; |
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} |
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|
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// Determine if the new rules even need to be saved. |
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$rules_hash = sha1( $new_rules ); |
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if ( get_site_option( 'patchstack_htaccess_rules_hash', '' ) == $rules_hash && ( stripos( $old, 'begin webarx' ) !== false || stripos( $old, 'begin patchstack' ) !== false ) ) { |
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return false; |
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} |
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|
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// Save the new rules and adjust # and newline of our own rules. |
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update_site_option( 'patchstack_htaccess_rules_hash', $rules_hash ); |
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$new_rules = preg_replace( "/[\r\n]+/", "\r\n", $new_rules ); |
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$new_rules = preg_replace( '/#/', "\r\n#", $new_rules ); |
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|
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// In order to support all Patchstack plugin versions with newline fix, we have to remove this part ourselves. |
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$new_rules = str_replace( "\r\n\r\n# BEGIN Patchstack", '# BEGIN Patchstack', $new_rules ); |
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$new_rules = str_replace( "# END Patchstack\r\n", '# END Patchstack', $new_rules ); |
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|
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// Remove RewriteBase / from the Patchstack rules. |
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$new_rules = str_replace( "\r\n RewriteBase /", '', $new_rules ); |
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$new_rules = str_replace( '/index.php', 'index.php', $new_rules ); |
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|
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// Merge the rules together. |
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$new_rules = $new_rules . "\n" . $current_rules; |
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|
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// Determine if the Patchstack rules starts on its own line. |
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$lines = explode( "\n", $new_rules ); |
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foreach ( $lines as $line ) { |
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if ( stripos( $line, 'begin patchstack' ) !== false && trim( strtolower( $line ) ) != '# begin patchstack' ) { |
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$new_rules = str_replace( '# BEGIN Patchstack', "\r\n# BEGIN Patchstack", $new_rules ); |
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} |
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} |
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|
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// Put the contents into the .htaccess file. |
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$fs->put_contents( ABSPATH . '.htaccess', $new_rules, FS_CHMOD_FILE ); |
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|
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// Check if the new rules work. |
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// 500 internal server error - did not work. Restore old rules. |
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$status = $this->get_site_status_code(); |
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if ( $status == '' || $status >= 500 ) { |
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$fs->put_contents( ABSPATH . '.htaccess', $old, FS_CHMOD_FILE ); |
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update_site_option( 'patchstack_firewall_custom_rules', '' ); |
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} |
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|
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return $status < 500; |
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} |
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|
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/** |
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* Retrieve the custom .htaccess rules and inject into the .htaccess file. |
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* |
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* @return string |
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*/ |
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public function get_custom_rules() { |
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$custom = get_site_option( 'patchstack_firewall_custom_rules', '' ); |
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if ( empty( $custom ) || is_array( $custom ) || $custom == 'Array' ) { |
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$custom = ''; |
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} |
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|
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// Do we have any custom rules to inject? |
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$tmp = ''; |
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if ( $custom != '' ) { |
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$tmp = PHP_EOL . '# CUSTOM PATCHSTACK RULES' . PHP_EOL; |
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$tmp .= $custom . PHP_EOL; |
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$tmp .= '# END CUSTOM PATCHSTACK RULES'; |
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} |
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return $tmp; |
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} |
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|
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/** |
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* Retrieve the status code of the site. |
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* This is done to determine if the .htaccess rules do not trigger an error. |
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* |
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* @return integer |
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*/ |
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public function get_site_status_code() { |
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$response = wp_remote_get( get_site_url() ); |
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$http_code = wp_remote_retrieve_response_code( $response ); |
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return $http_code; |
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} |
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|
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/** |
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* Remove all Patchstack rules from the .htaccess file. |
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* |
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* @return void |
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*/ |
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public function cleanup_htaccess_file() { |
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require_once ABSPATH . 'wp-admin/includes/class-wp-filesystem-base.php'; |
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require_once ABSPATH . 'wp-admin/includes/class-wp-filesystem-direct.php'; |
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$fs = new WP_Filesystem_Direct( '' ); |
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|
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if ( $fs->exists( ABSPATH . '.htaccess' ) ) { |
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$curdata = $fs->get_contents( ABSPATH . '.htaccess' ); |
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$rules = $this->delete_all_between( '# BEGIN Patchstack', '# END Patchstack', $curdata ); |
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$rules = $this->delete_all_between( '# CUSTOM PATCHSTACK RULES', '# END CUSTOM PATCHSTACK RULES', $rules ); |
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$fs->put_contents( ABSPATH . '.htaccess', $rules, FS_CHMOD_FILE ); |
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} |
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} |
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|
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/** |
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* Delete characters between a begin and end string. |
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* |
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* @param string $begin |
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* @param string $end |
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* @param string $string |
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* @return string |
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*/ |
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public function delete_all_between( $begin, $end, $string ) { |
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$begin_pos = strpos( $string, $begin ); |
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$end_pos = strpos( $string, $end ); |
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if ( $begin_pos === false || $end_pos === false ) { |
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return $string; |
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} |
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|
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$delete = substr( $string, $begin_pos, ( $end_pos + strlen( $end ) ) - $begin_pos ); |
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return str_replace( $delete, '', $string ); |
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} |
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} |
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|
