%PDF-
%PDF-
Mini Shell
Mini Shell
<?php
defined( 'ABSPATH' ) || die();
/**
* Class to handle the creation and include of the firewall
*/
class rsssl_firewall_manager {
/**
* Firewall object
*
* @var rsssl_firewall_manager
*/
private static $this;
/**
* File
*
* @var string
*/
private $file = WP_CONTENT_DIR . '/advanced-headers.php';
/**
* If we can use a dynamic path
*
* @var bool
*/
private $use_dynamic_path = WP_CONTENT_DIR === ABSPATH . 'wp-content';
//rules to add to the firewall.
private $rules;
/**
* Our constructor
*/
public function __construct() {
if ( isset( self::$this ) ) {
wp_die();
}
self::$this = $this;
// trigger this action to force rules update
add_action( 'rsssl_update_rules', array( $this, 'install' ), 10 );
add_action( 'rsssl_after_saved_fields', array( $this, 'install' ), 100 );
add_action( 'rsssl_deactivate', array( $this, 'uninstall' ), 20 );
add_filter( 'rsssl_notices', array( $this, 'notices' ) );
add_filter( 'before_rocket_htaccess_rules', array( $this, 'add_htaccess_rules_before_wp_rocket' ), 999 );
//handle activation and deactivation of wp rocket
add_action( 'rocket_activation', array( $this, 'remove_prepend_file_in_htaccess' ) );
add_action( 'rocket_deactivation', array( $this, 'include_prepend_file_in_htaccess' ) );
if ( ! defined( 'RSSSL_IS_WP_ENGINE' ) ) {
define( 'RSSSL_IS_WP_ENGINE', isset( $_SERVER['IS_WPE'] ) );
}
if ( ! defined( 'RSSSL_IS_FLYWHEEL' ) ) {
define( 'RSSSL_IS_FLYWHEEL', isset( $_SERVER['SERVER_SOFTWARE'] ) && strpos( $_SERVER['SERVER_SOFTWARE'], 'Flywheel/' ) === 0 );
}
if ( ! defined( 'RSSSL_IS_PRESSABLE' ) ) {
define( 'RSSSL_IS_PRESSABLE', ( defined( 'IS_ATOMIC' ) && IS_ATOMIC ) || ( defined( 'IS_PRESSABLE' ) && IS_PRESSABLE ) );
}
}
/**
* Main installer for the firewall file
*
* @return void
*/
public function install(): void {
if ( ! rsssl_admin_logged_in() ) {
return;
}
if ( wp_doing_ajax() ) {
return;
}
if ( empty( $this->rules ) ) {
$this->rules = apply_filters( 'rsssl_firewall_rules', '' );
}
// no rules? remove the file.
if ( empty( trim( $this->rules ) ) ) {
// $this->delete_file();
$this->remove_prepend_file_in_htaccess();
$this->remove_prepend_file_in_wp_config();
return;
}
// update the file to be included.
$this->update_firewall( $this->rules );
$this->include_prepend_file_in_wp_config();
if ( $this->uses_htaccess() ) {
$this->include_prepend_file_in_htaccess();
}
if ( $this->has_user_ini_file() ) {
$this->include_prepend_file_in_user_ini();
}
}
/**
* Remove file and file inclusions
*
* @return void
*/
public function uninstall(): void {
if ( ! rsssl_user_can_manage() ) {
return;
}
if ( wp_doing_ajax() ) {
return;
}
$this->remove_prepend_file_in_htaccess();
$this->remove_prepend_file_in_wp_config();
$this->remove_auto_prepend_file_in_user_ini();
$this->delete_file();
}
/**
* Check if our firewall file exists
*
* @param string $file // filename, including path
*
* @return bool
*/
private function file_exists( string $file ): bool {
return file_exists( $file );
// $wp_filesystem = $this->init_file_system();
// return $wp_filesystem->is_file($this->file);
}
/**
* Initialize the WP_Filesyste
*
* @return false|WP_Filesystem_Base
*/
private function init_file_system() {
if ( ! function_exists( 'WP_Filesystem' ) ) {
include_once ABSPATH . 'wp-admin/includes/file.php';
}
if ( false === ( $creds = request_filesystem_credentials( site_url(), '', false, false, null ) ) ) {
return false; // stop processing here.
}
global $wp_filesystem;
if ( ! WP_Filesystem( $creds ) ) {
// request_filesystem_credentials(site_url(), '', true, false, null);//phpcs:ingore
return false;
}
return $wp_filesystem;
}
/**
* Update the file that contains the firewall rules, advanced-headers.php
*
* @param string $rules //rules to add to the firewall.
*
* @return void
*/
public function update_firewall( string $rules ): void {
if ( ! rsssl_admin_logged_in() ) {
return;
}
$contents = '<?php' . "\n";
$contents .= '/**' . "\n";
$contents .= '* This file is created by Really Simple Security' . "\n";
$contents .= '*/' . "\n\n";
$contents .= '$base_path = dirname(__FILE__);' . "\n";
$contents .= 'if( file_exists( $base_path . "/rsssl-safe-mode.lock" ) ) {' . "\n";
$contents .= ' if ( ! defined( "RSSSL_SAFE_MODE" ) ) {' . "\n";
$contents .= ' define( "RSSSL_SAFE_MODE", true );' . "\n";
$contents .= ' }' . "\n";
$contents .= ' return;' . "\n";
$contents .= '}' . "\n\n";
// allow disabling of headers for detection purposes.
$contents .= 'if ( isset($_GET["rsssl_header_test"]) && (int) $_GET["rsssl_header_test"] === ' . $this->get_headers_nonce() . ' ) return;' . "\n\n";
//if already included at some point, don't execute again.
$contents .= 'if ( defined("RSSSL_HEADERS_ACTIVE" ) ) return;' . "\n";
$contents .= 'define( "RSSSL_HEADERS_ACTIVE", true );' . "\n";
$contents .= "//RULES START\n" . $rules;
$this->put_contents( $this->file, $contents );
}
/**
* Save data
*
* @param string $file //filename, including path.
* @param string $contents //data to save.
*
* @return void
*/
private function put_contents( $file, $contents ): void {
if ( ! rsssl_admin_logged_in() ) {
return;
}
if ( !file_exists($file) || $this->is_writable($file)) {
// $wp_filesystem = $this->init_file_system();
// $result = $wp_filesystem->put_contents($contents, $this->file);
file_put_contents( $file, $contents );//phpcs:ignore
} else if ( !$this->is_writable($file)) {
return;
}
//only chmod other files than .htaccess and wpconfig. We leave these as is.
if ( strpos($file, 'htaccess') === false || strpos($file, 'wp-config.php') === false ) {
if ( $this->file_exists( $this->file) ) {
chmod( $this->file, 0644 );//phpcs:ignore
}
}
}
/**
* Get the contents of a file
*
* @param string $file //filename, including path.
*
* @return string
*/
private function get_contents( string $file ): string {
if ( ! $this->file_exists( $file ) ) {
return '';
}
// $wp_filesystem = $this->init_file_system();
// $result = $wp_filesystem->get_contents($file);
return file_get_contents( $file );//phpcs:ignore
}
/**
* Delete a file
*
* @return void
*/
private function delete_file(): void {
if ( ! rsssl_user_can_manage() ) {
return;
}
if ( $this->file_exists( $this->file ) ) {
unlink( $this->file );//phpcs:ignore
}
// $wp_filesystem = $this->init_file_system();
// $wp_filesystem->delete($this->file);
}
/**
* @return bool
*
* Check if installation uses htaccess.conf (Bitnami)
*/
private function uses_htaccess_conf() {
$htaccess_conf_file = dirname( ABSPATH ) . '/conf/htaccess.conf';
//conf/htaccess.conf can be outside of open basedir, return false if so
$open_basedir = ini_get( 'open_basedir' );
if ( ! empty( $open_basedir ) ) {
return false;
}
return is_file( $htaccess_conf_file );
}
/**
* Get the .htaccess path
*
* @return string
*/
private function htaccess_path(): string {
if ( $this->uses_htaccess_conf() ) {
$htaccess_file = realpath( dirname( ABSPATH ) . '/conf/htaccess.conf' );
} else {
$htaccess_file = $this->get_home_path() . '.htaccess';
}
return $htaccess_file;
}
/**
* Get the home path
*
* @return string
*/
public function get_home_path(): string {
if ( ! function_exists( 'get_home_path' ) ) {
include_once ABSPATH . 'wp-admin/includes/file.php';
}
if ( RSSSL_IS_FLYWHEEL && isset( $_SERVER['DOCUMENT_ROOT'] ) ) {
return trailingslashit( $this->sanitize_path( wp_unslash( $_SERVER['DOCUMENT_ROOT'] ) ) );
}
return get_home_path();
}
/**
* Sanitize a path
*
* @param string $path //string to sanitize.
*
* @return string
*/
private function sanitize_path( $path ): string {
// prevent path traversal.
return str_replace( '../', '/', realpath( sanitize_text_field( $path ) ) );
}
/**
* Check if this server uses .htaccess. Not by checking the server header, but simply by checking
* if the htaccess file exists.
*
* @return bool
*/
private function uses_htaccess(): bool {
return $this->file_exists( $this->htaccess_path() );
}
/**
* Include the prepend file in the .htaccess
*
* @return void
*/
public function include_prepend_file_in_htaccess(): void {
if ( ! $this->file_exists( $this->file ) ) {
return;
}
// check if the wp-config contains the if constant condition, to prevent duplicate loading. If not, try upgrading. If that fails, skip.
if ( ! $this->wp_config_contains_latest() ) {
return;
}
$rules = $this->get_htaccess_rules();
$start = '#Begin Really Simple Auto Prepend File' . "\n";
$end = "\n" . '#End Really Simple Auto Prepend File' . "\n";
$pattern_content = '/' . $start . '(.*?)' . $end . '/is';
$htaccess_file = $this->htaccess_path();
if ( $this->file_exists( $htaccess_file ) ) {
$content = $this->get_contents( $htaccess_file );
// remove first, to ensure we are at the top of the file.
$content = preg_replace( $pattern_content, '', $content );
if ( ! empty( $rules ) ) {
if ( ! $this->is_writable( $htaccess_file ) ) {
update_site_option( 'rsssl_htaccess_error', 'not-writable' );
update_site_option( 'rsssl_htaccess_rules', $rules . get_site_option( 'rsssl_htaccess_rules' ) );
} else {
delete_site_option( 'rsssl_htaccess_error' );
delete_site_option( 'rsssl_htaccess_rules' );
// add rules as new block.
$content = $start . $rules . $end . $content;
// clean up.
if ( strpos( $content, "\n\n\n" ) !== false ) {
$content = str_replace( "\n\n\n", "\n\n", $content );
}
}
}
//by putting this outside the empty($rules) condition, the rules get removed if disabled or not available
if ( $this->is_writable( $htaccess_file ) ) {
$this->put_contents( $htaccess_file, $content );
}
}
}
/**
* Get the .htaccess rules for the prepend file
* Add user.ini blocking rules if user.ini filename exist.
*
* @return string //the string containing the lines of rules
*/
private function get_htaccess_rules() : string {
if ( defined('RSSSL_HTACCESS_SKIP_AUTO_PREPEND') && RSSSL_HTACCESS_SKIP_AUTO_PREPEND ) {
return '';
}
if (isset(RSSSL()->server) ) {
$config = RSSSL()->server->auto_prepend_config();
} else {
$config = get_option('rsssl_auto_prepend_config');
if (empty($config)) {
return '';
}
}
$file = addcslashes($this->file, "'");
switch ($config) {
case 'litespeed':
$rules = array(
'<IfModule LiteSpeed>',
'php_value auto_prepend_file ' . $file ,
'</IfModule>',
'<IfModule lsapi_module>',
'php_value auto_prepend_file ' . $file,
'</IfModule>',
);
break;
case 'apache-mod_php':
default:
$rules = array(
'<IfModule mod_php7.c>',
'php_value auto_prepend_file ' . $file ,
'</IfModule>',
'<IfModule mod_php.c>',
'php_value auto_prepend_file ' . $file,
'</IfModule>',
);
}
$userIni = ini_get('user_ini.filename');
if ($userIni) {
$rules = array_merge(
$rules,
array(
sprintf('<Files "%s">', addcslashes($userIni, '"')),
'<IfModule mod_authz_core.c>' ,
'Require all denied',
'</IfModule>',
'<IfModule !mod_authz_core.c>',
'Order deny,allow',
'Deny from all',
'</IfModule>',
'</Files>',
));
}
return implode( "\n", $rules );
}
/**
* Include the file in the wp-config
*
* @return void
*/
private function include_prepend_file_in_wp_config(): void {
if ( ! rsssl_user_can_manage() ) {
return;
}
$file = $this->wpconfig_path();
$content = $this->get_contents( $file );
if ( $this->is_writable( $file ) && strpos( $content, 'advanced-headers.php' ) === false ) {
$rule = $this->get_wp_config_rule();
// if RSSSL comment is found, insert after.
$rsssl_comment = '//END Really Simple Security Server variable fix';
if ( strpos( $content, $rsssl_comment ) !== false ) {
$pos = strrpos( $content, $rsssl_comment );
$updated = substr_replace( $content, $rsssl_comment . "\n" . $rule . "\n", $pos, strlen( $rsssl_comment ) );
} else {
$updated = preg_replace( '/<\?php/', "<?php\n" . $rule . "\n", $content, 1 );
}
if ( strpos( $updated, "\n\n\n" ) !== false ) {
$updated = str_replace( "\n\n\n", "\n\n", $updated );
}
$this->put_contents( $file, $updated );
}
// save errors.
if ( $this->is_writable( WP_CONTENT_DIR ) && ( $this->is_writable( $file ) || strpos( $content, 'advanced-headers.php' ) !== false ) ) {
update_option( 'rsssl_firewall_error', false, false );
} elseif ( ! $this->is_writable( $file ) ) {
update_option( 'rsssl_firewall_error', 'wpconfig-notwritable', false );
} elseif ( ! $this->is_writable( WP_CONTENT_DIR ) ) {
update_option( 'rsssl_firewall_error', 'advanced-headers-notwritable', false );
}
}
/**
* Clear the rules
*
* @return void
*/
public function remove_prepend_file_in_htaccess(): void {
if ( ! rsssl_user_can_manage() ) {
return;
}
$start = '#Begin Really Simple Auto Prepend File' . "\n";
$end = "\n" . '#End Really Simple Auto Prepend File' . "\n";
$pattern = '/' . $start . '(.*?)' . $end . '/is';
$htaccess_file = $this->htaccess_path();
if ( $this->file_exists( $htaccess_file ) ) {
$content = $this->get_contents( $htaccess_file );
// remove first, to ensure we are at the top of the file.
$content = preg_replace( $pattern, '', $content );
$this->put_contents( $htaccess_file, $content );
}
}
/**
* Remove the prepend file from the config
*
* @return void
*/
private function remove_prepend_file_in_wp_config(): void {
if ( ! rsssl_user_can_manage() ) {
return;
}
$file = $this->wpconfig_path();
if ( $this->is_writable( $file ) ) {
$content = $this->get_contents( $file );
$rule = $this->get_wp_config_rule();
if ( strpos( $content, $rule ) !== false ) {
$content = str_replace( $rule, '', $content );
if ( strpos( $content, "\n\n\n" ) !== false ) {
$content = str_replace( "\n\n\n", "\n\n", $content );
}
$this->put_contents( $file, $content );
}
}
}
/**
* Wrapper function
*
* @param string $file // filename, including path.
*
* @return bool
*/
private function is_writable( $file ): bool {
// $wp_filesystem = $this->init_file_system();
// return $wp_filesystem->is_writable($file);
return is_writable( $file );//phpcs:ignore
}
/**
* This class has it's own settings page, to ensure it can always be called
*
* @return bool
*/
public function is_settings_page() {
if ( rsssl_is_logged_in_rest() ) {
return true;
}
if ( isset( $_GET['page'] ) && 'really-simple-security' === $_GET['page'] ) {//phpcs:ignore
return true;
}
return false;
}
/**
* Generate and return a random nonce
*
* @return int
*/
public function get_headers_nonce() {
if ( ! get_site_option( 'rsssl_header_detection_nonce' ) ) {
update_site_option( 'rsssl_header_detection_nonce', wp_rand( 1000, 999999999 ) );
}
return (int) get_site_option( 'rsssl_header_detection_nonce' );
}
/**
* Check if any rules were added
*
* @return bool
*/
public function has_rules() {
if ( empty( $this->rules ) ) {
$this->rules = apply_filters( 'rsssl_firewall_rules', '' );
}
return ! empty( trim( $this->rules ) );
}
/**
* Get the status for the firewall rules writing
*
* @return false|string
*/
public function firewall_write_error() {
return get_site_option( 'rsssl_firewall_error' );
}
/**
* Get the status for the firewall
*
* @return bool
*/
public function firewall_active_error() {
if ( ! $this->has_rules() ) {
return false;
}
return ! defined( 'RSSSL_HEADERS_ACTIVE' );
}
/**
* Show some notices
*
* @param array $notices //array of notices.
*
* @return array
*/
public function notices( $notices ) {
$notices['firewall-error'] = array(
'callback' => 'RSSSL_SECURITY()->firewall_manager->firewall_write_error',
'score' => 5,
'output' => array(
'wpconfig-notwritable' => array(
'title' => __( 'Firewall', 'really-simple-ssl' ),
'msg' => __( 'A firewall rule was enabled, but the wp-config.php is not writable.', 'really-simple-ssl' ) . ' ' . __( 'Please set the wp-config.php to writable until the rule has been written.', 'really-simple-ssl' ),
'icon' => 'open',
'dismissible' => true,
),
'advanced-headers-notwritable' => array(
'title' => __( 'Firewall', 'really-simple-ssl' ),
'msg' => __( 'A firewall rule was enabled, but /the wp-content/ folder is not writable.', 'really-simple-ssl' ) . ' ' . __( 'Please set the wp-content folder to writable:', 'really-simple-ssl' ),
'icon' => 'open',
'dismissible' => true,
),
),
'show_with_options' => array(
'disable_http_methods',
),
);
$notices['firewall-active'] = array(
'condition' => array( 'RSSSL_SECURITY()->firewall_manager->firewall_active_error' ),
'callback' => '_true_',
'score' => 5,
'output' => array(
'true' => array(
'title' => __( 'Firewall', 'really-simple-ssl' ),
'msg' => __( 'A firewall rule was enabled, but the firewall does not seem to get loaded correctly.', 'really-simple-ssl' ) . ' ' . __( 'Please check if the advanced-headers.php file is included in the wp-config.php, and exists in the wp-content folder.', 'really-simple-ssl' ),
'icon' => 'open',
'dismissible' => true,
),
),
'show_with_options' => array(
'disable_http_methods',
),
);
return $notices;
}
/**
* // As WP_CONTENT_DIR is not defined at this point in the wp-config, we can't use that.
* // for those setups where the WP_CONTENT_DIR is not in the default location, we hardcode the path.
*
* @return string
*/
public function get_wp_config_rule() {
if ( $this->use_dynamic_path ) {
$rule = 'if (!defined("RSSSL_HEADERS_ACTIVE") && file_exists( ABSPATH . "wp-content/advanced-headers.php")) {' . "\n";
$rule .= "\t" . 'require_once ABSPATH . "wp-content/advanced-headers.php";' . "\n" . '}';
} else {
$rule = 'if (!defined("RSSSL_HEADERS_ACTIVE") && file_exists(\'' . WP_CONTENT_DIR . '/advanced-headers.php\')) {' . "\n";
$rule .= "\t" . 'require_once \'' . WP_CONTENT_DIR . '/advanced-headers.php\';' . "\n" . '}';
}
return $rule;
}
/**
* Check if the wp-config contains the if constant condition, to prevent duplicate loading. If not, try upgrading. If that fails, skip.
* Wrapper function added for clearer purpose in code
*
* @return bool
*/
private function wp_config_contains_latest(): bool {
return $this->update_wp_config_rule();
}
/**
* Called in upgrade.php, to upgrade older rules to the latest.
* Returns true if the wpconfig contains the upgraded lines
*
* @return bool
*/
public function update_wp_config_rule(): bool {
$file = $this->wpconfig_path();
if ( ! $file ) {
return false;
}
$content = $this->get_contents( $file );
$find = '(file_exists( ABSPATH . "wp-content/advanced-headers.php"))';
if ( false !== strpos( $content, $find ) ) {
if ( ! $this->is_writable( $file ) ) {
return false;
}
$replace = '(!defined("RSSSL_HEADERS_ACTIVE") && file_exists( ABSPATH . "wp-content/advanced-headers.php"))';
$content = str_replace( $find, $replace, $content );
$this->put_contents( $file, $content );
}
return true;
}
/**
* Admin is not always loaded here, so we define our own function
*
* @return string|null
*/
public function wpconfig_path() {
// limit nr of iterations to 5.
$i = 0;
$maxiterations = 5;
$dir = ABSPATH;
do {
++$i;
if ( $this->file_exists( $dir . 'wp-config.php' ) ) {
return apply_filters('rsssl_wpconfig_path', $dir . 'wp-config.php' );
}
} while ( ( $dir = realpath( "$dir/.." ) ) && ( $i < $maxiterations ) );//phpcs:ignore
return apply_filters( 'rsssl_wpconfig_path', null );
}
/**
* Clear the headers
*
* @return void
*/
public function remove_advanced_headers() {
$this->uninstall();
}
/**
* Return .htaccess redirect when using WP Rocket
* @return string
*/
public function add_htaccess_rules_before_wp_rocket($rules) {
if ( !file_exists( $this->file ) ) {
return $rules;
}
$rules = $this->get_htaccess_rules()."\n".$rules;
if ( ! empty( $rules ) ) {
$start = '#Begin Really Simple Auto Prepend File' . "\n";
$end = "\n" . '#End Really Simple Auto Prepend File' . "\n";
$rules = $start . $rules . $end;
}
return $rules;
}
/**
* Check if a user.ini file exists or is in user.
*
* @return bool
*/
private function has_user_ini_file():bool {
$userIni = ini_get('user_ini.filename');
if ( $userIni ) {
return true;
}
return false;
}
/**
* Add auto prepend file to user.ini
*
* @return void
*/
private function include_prepend_file_in_user_ini():void{
if ( ! rsssl_user_can_manage() ) {
return;
}
if ( defined('RSSSL_HTACCESS_SKIP_AUTO_PREPEND') && RSSSL_HTACCESS_SKIP_AUTO_PREPEND ) {
return;
}
$config = RSSSL()->server->auto_prepend_config();
if ( !$this->has_user_ini_file() ) {
return;
}
$autoPrependIni = '';
$userIniPath = $this->get_user_ini_path();
// .user.ini configuration
switch ($config) {
case 'cgi':
case 'nginx':
case 'apache-suphp':
case 'litespeed':
case 'iis':
$autoPrependIni = sprintf("; BEGIN Really Simple Auto Prepend File
auto_prepend_file = '%s'
; END Really Simple Auto Prepend File", addcslashes($this->file, "'"));
break;
}
if ( !empty($autoPrependIni) ) {
// Modify .user.ini
$userIniContent = $this->get_contents($userIniPath);
if ( $userIniContent ) {
$userIniContent = str_replace('auto_prepend_file', ';auto_prepend_file', $userIniContent);
$regex = '/; BEGIN Really Simple Auto Prepend File.*?; END Really Simple Auto Prepend File/is';
if (preg_match($regex, $userIniContent, $matches)) {
$userIniContent = preg_replace($regex, $autoPrependIni, $userIniContent);
} else {
$userIniContent .= "\n" . $autoPrependIni;
}
} else {
$userIniContent = $autoPrependIni;
}
$this->put_contents($userIniPath, $userIniContent);
}
}
/**
* Get the user.ini path
*
* @return false|string
*/
public function get_user_ini_path() {
$userIni = ini_get('user_ini.filename');
if ($userIni) {
return $this->get_home_path() . $userIni;
}
return false;
}
/**
* Remove the added auto prepend file
*
* @return void
*/
private function remove_auto_prepend_file_in_user_ini() {
if ( ! rsssl_user_can_manage() ) {
return;
}
if ( ! $this->has_user_ini_file() ) {
return;
}
$userIniPath = $this->get_user_ini_path();
$userIniContent = $this->get_contents( $userIniPath );
$userIniContent = preg_replace( '/; BEGIN Really Simple Auto Prepend File.*?; END Really Simple Auto Prepend File/is', '', $userIniContent );
$userIniContent = str_replace( 'auto_prepend_file', ';auto_prepend_file', $userIniContent );
$this->put_contents( $userIniPath, $userIniContent );
}
}
Zerion Mini Shell 1.0