Error! The URL value is empty. Please specify a correct URL value to redirect to!"; exit; } if (!headers_sent()) { header('Location: ' . $url); } else { echo ''; } if ($exit == '1') { exit; } } /** * Returns logout URL with "after logout URL" query params * * @param type $after_logout_url * @return type */ static function get_logout_url_with_after_logout_url_value($after_logout_url) { return AIOWPSEC_WP_URL . '?aiowpsec_do_log_out=1&after_logout=' . $after_logout_url; } /** * Checks if a particular username exists in the WP Users table * @global type $wpdb * @param type $username * @return boolean */ static function check_user_exists($username) { global $wpdb; //if username is empty just return false if ($username == '') { return false; } //If multisite if (AIOWPSecurity_Utility::is_multisite_install()) { $blog_id = get_current_blog_id(); $admin_users = get_users('blog_id=' . $blog_id . '&orderby=login&role=administrator'); foreach ($admin_users as $user) { if ($user->user_login == $username) { return true; } } return false; } //check users table $sanitized_username = sanitize_text_field($username); $sql_1 = $wpdb->prepare("SELECT user_login FROM $wpdb->users WHERE user_login=%s", $sanitized_username); $user_login = $wpdb->get_var($sql_1); if ($user_login == $sanitized_username) { return true; } else { //make sure that the sanitized username is an integer before comparing it to the users table's ID column $sanitized_username_is_an_integer = (1 === preg_match('/^\d+$/', $sanitized_username)); if ($sanitized_username_is_an_integer) { $sql_2 = $wpdb->prepare("SELECT ID FROM $wpdb->users WHERE ID=%d", intval($sanitized_username)); $userid = $wpdb->get_var($sql_2); return ($userid == $sanitized_username); } else { return false; } } } /** * This function will return a list of user accounts which have login and nick names which are identical * @global type $wpdb * @return type */ static function check_identical_login_and_nick_names() { global $wpdb; $accounts_found = $wpdb->get_results("SELECT ID,user_login FROM `" . $wpdb->users . "` WHERE user_login<=>display_name;", ARRAY_A); return $accounts_found; } static function add_query_data_to_url($url, $name, $value) { if (strpos($url, '?') === false) { $url .= '?'; } else { $url .= '&'; } $url .= $name . '=' . urlencode($value); return $url; } /** * Generates a random alpha-numeric number * @param type $string_length * @return string */ static function generate_alpha_numeric_random_string($string_length) { //Charecters present in table prefix $allowed_chars = 'abcdefghijklmnopqrstuvwxyz0123456789'; $string = ''; //Generate random string for ($i = 0; $i < $string_length; $i++) { $string .= $allowed_chars[rand(0, strlen($allowed_chars) - 1)]; } return $string; } /** * Generates a random string using a-z characters * @param type $string_length * @return string */ static function generate_alpha_random_string($string_length) { //Charecters present in table prefix $allowed_chars = 'abcdefghijklmnopqrstuvwxyz'; $string = ''; //Generate random string for ($i = 0; $i < $string_length; $i++) { $string .= $allowed_chars[rand(0, strlen($allowed_chars) - 1)]; } return $string; } /** * Sets cookie * @param type $cookie_name * @param type $cookie_value * @param type $expiry_seconds * @param type $path * @param string $cookie_domain */ static function set_cookie_value($cookie_name, $cookie_value, $expiry_seconds = 86400, $path = '/', $cookie_domain = '') { $expiry_time = time() + intval($expiry_seconds); if (empty($cookie_domain)) { $cookie_domain = COOKIE_DOMAIN; } setcookie($cookie_name, $cookie_value, $expiry_time, $path, $cookie_domain); } /** * Gets cookie * @param type $cookie_name * @return string */ static function get_cookie_value($cookie_name) { if (isset($_COOKIE[$cookie_name])) { return $_COOKIE[$cookie_name]; } return ""; } /** * Checks if installation is multisite * @return type */ static function is_multisite_install() { return function_exists('is_multisite') && is_multisite(); } /** * This is a general yellow box message for when we want to suppress a feature's config items because site is subsite of multi-site */ static function display_multisite_message() { echo '
'; echo '

' . __('The plugin has detected that you are using a Multi-Site WordPress installation.', 'all-in-one-wp-security-and-firewall') . '

' . __('This feature can only be configured by the "superadmin" on the main site.', 'all-in-one-wp-security-and-firewall') . '

'; echo '
'; } /** * Modifies the wp-config.php file to disable PHP file editing from the admin panel * This function will add the following code: * define('DISALLOW_FILE_EDIT', false); * * NOTE: This function will firstly check if the above code already exists * and it will modify the bool value, otherwise it will insert the code mentioned above * * @global type $aio_wp_security * @return boolean */ static function disable_file_edits() { global $aio_wp_security; $edit_file_config_entry_exists = false; //Config file path $config_file = AIOWPSecurity_Utility_File::get_wp_config_file_path(); //Get wp-config.php file contents so we can check if the "DISALLOW_FILE_EDIT" variable already exists $config_contents = file($config_file); foreach ($config_contents as $line_num => $line) { if (strpos($line, "'DISALLOW_FILE_EDIT', false")) { $config_contents[$line_num] = str_replace('false', 'true', $line); $edit_file_config_entry_exists = true; //$this->show_msg_updated(__('Settings Saved - The ability to edit PHP files via the admin the panel has been DISABLED.', 'all-in-one-wp-security-and-firewall')); } else if (strpos($line, "'DISALLOW_FILE_EDIT', true")) { $edit_file_config_entry_exists = true; //$this->show_msg_updated(__('Your system config file is already configured to disallow PHP file editing.', 'all-in-one-wp-security-and-firewall')); return true; } //For wp-config.php files originating from early WP versions we will remove the closing php tag if (strpos($line, "?>") !== false) { $config_contents[$line_num] = str_replace("?>", "", $line); } } if (!$edit_file_config_entry_exists) { //Construct the config code which we will insert into wp-config.php $new_snippet = '//Disable File Edits' . PHP_EOL; $new_snippet .= 'define(\'DISALLOW_FILE_EDIT\', true);'; $config_contents[] = $new_snippet; //Append the new snippet to the end of the array } //Make a backup of the config file if (!AIOWPSecurity_Utility_File::backup_and_rename_wp_config($config_file)) { AIOWPSecurity_Admin_Menu::show_msg_error_st(__('Failed to make a backup of the wp-config.php file. This operation will not go ahead.', 'all-in-one-wp-security-and-firewall')); //$aio_wp_security->debug_logger->log_debug("Disable PHP File Edit - Failed to make a backup of the wp-config.php file.",4); return false; } else { //$this->show_msg_updated(__('A backup copy of your wp-config.php file was created successfully....', 'all-in-one-wp-security-and-firewall')); } //Now let's modify the wp-config.php file if (AIOWPSecurity_Utility_File::write_content_to_file($config_file, $config_contents)) { //$this->show_msg_updated(__('Settings Saved - Your system is now configured to not allow PHP file editing.', 'all-in-one-wp-security-and-firewall')); return true; } else { //$this->show_msg_error(__('Operation failed! Unable to modify wp-config.php file!', 'all-in-one-wp-security-and-firewall')); $aio_wp_security->debug_logger->log_debug("Disable PHP File Edit - Unable to modify wp-config.php", 4); return false; } } /** * Modifies the wp-config.php file to allow PHP file editing from the admin panel * This func will modify the following code by replacing "true" with "false": * define('DISALLOW_FILE_EDIT', true); * * @global type $aio_wp_security * @return boolean */ static function enable_file_edits() { global $aio_wp_security; $edit_file_config_entry_exists = false; //Config file path $config_file = AIOWPSecurity_Utility_File::get_wp_config_file_path(); //Get wp-config.php file contents $config_contents = file($config_file); foreach ($config_contents as $line_num => $line) { if (strpos($line, "'DISALLOW_FILE_EDIT', true")) { $config_contents[$line_num] = str_replace('true', 'false', $line); $edit_file_config_entry_exists = true; } else if (strpos($line, "'DISALLOW_FILE_EDIT', false")) { $edit_file_config_entry_exists = true; //$this->show_msg_updated(__('Your system config file is already configured to allow PHP file editing.', 'all-in-one-wp-security-and-firewall')); return true; } } if (!$edit_file_config_entry_exists) { //if the DISALLOW_FILE_EDIT settings don't exist in wp-config.php then we don't need to do anything //$this->show_msg_updated(__('Your system config file is already configured to allow PHP file editing.', 'all-in-one-wp-security-and-firewall')); return true; } else { //Now let's modify the wp-config.php file if (AIOWPSecurity_Utility_File::write_content_to_file($config_file, $config_contents)) { //$this->show_msg_updated(__('Settings Saved - Your system is now configured to allow PHP file editing.', 'all-in-one-wp-security-and-firewall')); return true; } else { //$this->show_msg_error(__('Operation failed! Unable to modify wp-config.php file!', 'all-in-one-wp-security-and-firewall')); //$aio_wp_security->debug_logger->log_debug("Disable PHP File Edit - Unable to modify wp-config.php",4); return false; } } } /** * Inserts event logs to the database * For now we are using for 404 events but in future will expand for other events * * @param string $event_type : Event type, eg, 404 (see below for list of event types) * @param string $username (optional): username * * Event types: 404 (...add more as we expand this) * @param $event_type * @param string $username * @return bool */ static function event_logger($event_type, $username = '') { global $wpdb, $aio_wp_security; //Some initialising $url = ''; $referer_info = ''; $events_table_name = AIOWPSEC_TBL_EVENTS; $ip_or_host = AIOWPSecurity_Utility_IP::get_user_ip_address(); //Get the IP address of user $username = sanitize_user($username); $user = get_user_by('login', $username); //Returns WP_User object if exists if ($user) { //If valid user set variables for DB storage later on $user_id = (absint($user->ID) > 0) ? $user->ID : 0; } else { //If the login attempt was made using a non-existent user then let's set user_id to blank and record the attempted user login name for DB storage later on $user_id = 0; } if ($event_type == '404') { //if 404 event get some relevant data $url = isset($_SERVER['REQUEST_URI']) ? esc_attr($_SERVER['REQUEST_URI']) : ''; $referer_info = isset($_SERVER['HTTP_REFERER']) ? esc_attr($_SERVER['HTTP_REFERER']) : ''; } $current_time = date_i18n( 'Y-m-d H:i:s' ); $data = array( 'event_type' => $event_type, 'username' => $username, 'user_id' => $user_id, 'event_date' => $current_time, 'ip_or_host' => $ip_or_host, 'referer_info' => $referer_info, 'url' => $url, 'event_data' => '', ); $data = apply_filters( 'filter_event_logger_data', $data ); //log to database $result = $wpdb->insert($events_table_name, $data); if ($result === FALSE) { $aio_wp_security->debug_logger->log_debug("event_logger: Error inserting record into " . $events_table_name, 4);//Log the highly unlikely event of DB error return false; } return true; } /** * Checks if IP address is locked * * @param string $ip : ip address * @returns TRUE if locked, FALSE otherwise * **/ static function check_locked_ip($ip) { global $wpdb; $login_lockdown_table = AIOWPSEC_TBL_LOGIN_LOCKDOWN; $locked_ip = $wpdb->get_row("SELECT * FROM $login_lockdown_table " . "WHERE release_date > now() AND " . "failed_login_ip = '" . esc_sql($ip) . "'", ARRAY_A); if ($locked_ip != NULL) { return TRUE; } else { return FALSE; } } /** * Returns list of IP addresses locked out * @global type $wpdb * @return array of addresses found or FALSE otherwise */ static function get_locked_ips() { global $wpdb; $login_lockdown_table = AIOWPSEC_TBL_LOGIN_LOCKDOWN; $locked_ips = $wpdb->get_results("SELECT * FROM $login_lockdown_table " . "WHERE release_date > now()", ARRAY_A); if ($locked_ips != NULL) { return $locked_ips; } else { return FALSE; } } /** * Locks an IP address - Adds an entry to the aiowps_lockdowns table * @global type $wpdb * @global type $aio_wp_security * @param type $ip * @param type $lock_reason * @param type $username */ static function lock_IP($ip, $lock_reason = '', $username = '') { global $wpdb, $aio_wp_security; $login_lockdown_table = AIOWPSEC_TBL_LOGIN_LOCKDOWN; $lockout_time_length = $aio_wp_security->configs->get_value('aiowps_lockout_time_length'); //TODO add a setting for this feature $username = sanitize_user($username); $user = get_user_by('login', $username); //Returns WP_User object if exists if (FALSE == $user) { // Not logged in. $username = ''; $user_id = 0; } else { // Logged in. $username = sanitize_user($user->user_login); $user_id = $user->ID; } $ip_str = esc_sql($ip); $insert = "INSERT INTO " . $login_lockdown_table . " (user_id, user_login, lockdown_date, release_date, failed_login_IP, lock_reason) " . "VALUES ('" . $user_id . "', '" . $username . "', now(), date_add(now(), INTERVAL " . $lockout_time_length . " MINUTE), '" . $ip_str . "', '" . $lock_reason . "')"; $result = $wpdb->query($insert); if ($result > 0) { } else if ($result === FALSE) { $aio_wp_security->debug_logger->log_debug("lock_IP: Error inserting record into " . $login_lockdown_table, 4);//Log the highly unlikely event of DB error } } /** * Returns an array of blog_ids for a multisite install * * @global type $wpdb * @global type $wpdb * @return array or empty array if not multisite */ static function get_blog_ids() { global $wpdb; if (AIOWPSecurity_Utility::is_multisite_install()) { global $wpdb; $blog_ids = $wpdb->get_col("SELECT blog_id FROM " . $wpdb->prefix . "blogs"); } else { $blog_ids = array(); } return $blog_ids; } /** * This function will delete the oldest rows from a table which are over the max amount of rows specified * @global type $wpdb * @global type $aio_wp_security * @param type $table_name * @param type $max_rows * @return bool */ static function cleanup_table($table_name, $max_rows = '10000') { global $wpdb, $aio_wp_security; $num_rows = $wpdb->get_var("select count(*) from $table_name"); $result = true; if ($num_rows > $max_rows) { //if the table has more than max entries delete oldest rows $del_sql = "DELETE FROM $table_name WHERE id <= ( SELECT id FROM ( SELECT id FROM $table_name ORDER BY id DESC LIMIT 1 OFFSET $max_rows ) foo_tmp )"; $result = $wpdb->query($del_sql); if ($result === false) { $aio_wp_security->debug_logger->log_debug("AIOWPSecurity_Utility::cleanup_table failed for table name: " . $table_name, 4); } } return ($result === false) ? false : true; } /** * Delete expired captcha info transients * * Note: A unique instance these transients is created everytime the login page is loaded with captcha enabled * This function will help prune the options table of old expired entries. * * @global wpdb $wpdb */ static function delete_expired_captcha_transients(){ global $wpdb; $current_unix_time = current_time( 'timestamp', true ); $tbl = $wpdb->prefix . 'options'; $query = "SELECT * FROM ".$tbl." WHERE `option_name` LIKE '%\_transient\_timeout\_aiowps\_captcha\_string\_info%' AND `option_value` < ".$current_unix_time; $res = $wpdb->get_results( $query, ARRAY_A ); if(!empty($res)){ foreach($res as $item){ $transient_name = str_replace('_transient_timeout_', '', $item['option_name']); //extract transient name AIOWPSecurity_Utility::is_multisite_install()?delete_site_transient($transient_name):delete_transient($transient_name); } } } /** * Gets server type. * * @return string or -1 if server is not supported */ static function get_server_type() { //figure out what server they're using if (strstr(strtolower(filter_var($_SERVER['SERVER_SOFTWARE'], FILTER_SANITIZE_STRING)), 'apache')) { return 'apache'; } else if (strstr(strtolower(filter_var($_SERVER['SERVER_SOFTWARE'], FILTER_SANITIZE_STRING)), 'nginx')) { return 'nginx'; } else if (strstr(strtolower(filter_var($_SERVER['SERVER_SOFTWARE'], FILTER_SANITIZE_STRING)), 'litespeed')) { return 'litespeed'; } else if (strstr(strtolower(filter_var($_SERVER['SERVER_SOFTWARE'], FILTER_SANITIZE_STRING)), 'iis')) { return 'iis'; } else { //unsupported server return -1; } } /** * Checks if the string exists in the array key value of the provided array. * If it doesn't exist, it returns the first key element from the valid values. * @param type $to_check * @param type $valid_values * @return type */ static function sanitize_value_by_array($to_check, $valid_values) { $keys = array_keys($valid_values); $keys = array_map('strtolower', $keys); if (in_array(strtolower($to_check), $keys)) { return $to_check; } return reset($keys); //Return the first element from the valid values } }