<?php
/**
* s2Member's Brute Force protection routines.
*
* Copyright: © 2009-2011
* {@link http://www.websharks-inc.com/ WebSharks, Inc.}
* ( coded in the USA )
*
* Released under the terms of the GNU General Public License.
* You should have received a copy of the GNU General Public License,
* along with this software. In the main directory, see: /licensing/
* If not, see: {@link http://www.gnu.org/licenses/}.
*
* @package s2Member\Brute_Force
* @since 3.5
*/
if (realpath (__FILE__) === realpath ($_SERVER["SCRIPT_FILENAME"]))
	exit("Do not access this file directly.");
/**/
if (!class_exists ("c_ws_plugin__s2member_brute_force"))
	{
		/**
		* s2Member's Brute Force protection routines.
		*
		* @package s2Member\Brute_Force
		* @since 3.5
		*/
		class c_ws_plugin__s2member_brute_force
			{
				/**
				* Tracks failed login attempts.
				*
				* Prevents an attacker from guessing Usernames/Passwords.
				* Allows only 5 failed login attempts every 30 minutes.
				*
				* @package s2Member\Brute_Force
				* @since 3.5
				*
				* @attaches-to ``add_action("wp_login_failed");``
				*
				* @param str $username Expects the $username to be passed in through the Hook.
				* @return null
				*/
				public static function track_failed_logins ($username = FALSE)
					{
						eval('foreach(array_keys(get_defined_vars())as$__v)$__refs[$__v]=&$$__v;');
						do_action ("ws_plugin__s2member_before_track_failed_logins", get_defined_vars ());
						unset ($__refs, $__v); /* Unset defined __refs, __v. */
						/**/
						if (($max = $GLOBALS["WS_PLUGIN__"]["s2member"]["o"]["max_failed_login_attempts"]))
							{
								$exp_secs = strtotime ("+" . apply_filters ("ws_plugin__s2member_track_failed_logins__exp_time", "30 minutes", get_defined_vars ())) - time ();
								/* If you add Filters to this value, you should use a string that is compatible with PHP's strtotime() function. */
								/**/
								$transient = "s2m_ipr_" . md5 ("s2member_transient_failed_login_attempts_" . $_SERVER["REMOTE_ADDR"]);
								set_transient ($transient, (int)get_transient ($transient) + 1, $exp_secs);
							}
						/**/
						do_action ("ws_plugin__s2member_after_track_failed_logins", get_defined_vars ());
						/**/
						return; /* Return for uniformity. */
					}
				/**
				* Stops anyone attempting a Brute Force attack.
				*
				* Prevents an attacker from guessing Usernames/Passwords.
				* Allows only 5 failed login attempts every 30 minutes.
				*
				* @package s2Member\Brute_Force
				* @since 3.5
				*
				* @attaches-to ``add_filter("authenticate");``
				*
				* @param obj $user Expects a WP_User object, or possibly a null value.
				* 	This parameter value is simply passed through this routine.
				* @return obj|null Either null, the ``$user`` obj, or a `WP_Error` obj.
				*/
				public static function stop_brute_force_logins ($user = FALSE)
					{
						eval('foreach(array_keys(get_defined_vars())as$__v)$__refs[$__v]=&$$__v;');
						do_action ("ws_plugin__s2member_before_stop_brute_force_logins", get_defined_vars ());
						unset ($__refs, $__v); /* Unset defined __refs, __v. */
						/**/
						if (($max = $GLOBALS["WS_PLUGIN__"]["s2member"]["o"]["max_failed_login_attempts"]))
							{
								$exp_secs = strtotime ("+" . apply_filters ("ws_plugin__s2member_track_failed_logins__exp_time", "30 minutes", get_defined_vars ())) - time ();
								/* If you add Filters to this value, you should use a string that is compatible with PHP's strtotime() function. */
								/**/
								$about = c_ws_plugin__s2member_utils_time::approx_time_difference (time (), time () + $exp_secs);
								/**/
								if ((int)get_transient ("s2m_ipr_" . md5 ("s2member_transient_failed_login_attempts_" . $_SERVER["REMOTE_ADDR"])) > $max)
									{
										$errors = new WP_Error ("incorrect_password", "Max failed logins. Please wait " . $about . " and try again.");
										/**/
										eval('foreach(array_keys(get_defined_vars())as$__v)$__refs[$__v]=&$$__v;');
										do_action ("ws_plugin__s2member_during_stop_brute_force_logins", get_defined_vars ());
										unset ($__refs, $__v); /* Unset defined __refs, __v. */
									}
							}
						/**/
						return apply_filters ("ws_plugin__s2member_stop_brute_force_logins", ((!empty ($errors)) ? $errors : $user), get_defined_vars ());
					}
			}
	}
?>