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<?php |
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defined('ROOT_PATH') or exit('Access denied'); |
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/** |
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* TNH Framework |
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* |
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* A simple PHP framework using HMVC architecture |
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* |
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* This content is released under the GNU GPL License (GPL) |
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* |
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* Copyright (C) 2017 Tony NGUEREZA |
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* |
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* This program is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU General Public License |
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* as published by the Free Software Foundation; either version 3 |
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* of the License, or (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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*/ |
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class Security{ |
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/** |
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* The logger instance |
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* @var Log |
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*/ |
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private static $logger; |
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/** |
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* Get the logger singleton instance |
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* @return Log the logger instance |
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*/ |
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private static function getLogger(){ |
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if(self::$logger == null){ |
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self::$logger[0] =& class_loader('Log', 'classes'); |
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self::$logger[0]->setLogger('Library::Security'); |
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} |
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return self::$logger[0]; |
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} |
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/** |
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* This method is used to generate the CSRF token |
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* @return string the generated CSRF token |
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*/ |
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public static function generateCSRF(){ |
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$logger = self::getLogger(); |
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$logger->debug('Generation of CSRF ...'); |
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$key = get_config('csrf_key', 'csrf_key'); |
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$expire = get_config('csrf_expire', 60); |
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$keyExpire = 'csrf_expire'; |
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$currentTime = time(); |
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if(Session::exists($key) && Session::exists($keyExpire) && Session::get($keyExpire) > $currentTime){ |
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$logger->info('The CSRF token not yet expire just return it'); |
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return Session::get($key); |
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} |
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else{ |
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$newTime = $currentTime + $expire; |
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$token = sha1(uniqid()) . sha1(uniqid()); |
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$logger->info('The CSRF informations are listed below: key [' .$key. '], key expire [' .$keyExpire. '], expire time [' .$expire. '], token [' .$token. ']'); |
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Session::set($keyExpire, $newTime); |
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Session::set($key, $token); |
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return Session::get($key); |
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} |
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} |
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/** |
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* This method is used to check the CSRF if is valid, not yet expire, etc. |
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* @return boolean true if valid, false if not valid |
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*/ |
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public static function validateCSRF(){ |
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$logger = self::getLogger(); |
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$logger->debug('Validation of CSRF ...'); |
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$key = get_config('csrf_key', 'csrf_key'); |
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$expire = get_config('csrf_expire', 60); |
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$keyExpire = 'csrf_expire'; |
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$currentTime = time(); |
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$logger->info('The CSRF informations are listed below: key [' .$key. '], key expire [' .$keyExpire. '], expire time [' .$expire. ']'); |
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if(! Session::exists($key) || Session::get($keyExpire) <= $currentTime){ |
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$logger->warning('The CSRF session data is not valide'); |
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return false; |
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} |
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//perform form data |
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//need use request->query() for best retrieve |
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//super instance |
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$obj = & get_instance(); |
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$token = $obj->request->query($key); |
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if(! $token || $token !== Session::get($key) || Session::get($keyExpire) <= $currentTime){ |
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$logger->warning('The CSRF data [' .$token. '] is not valide may be attacker do his job'); |
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return false; |
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} |
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$logger->info('The CSRF data [' .$token. '] is valide the form data is safe continue'); |
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//remove the token from session |
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Session::clear($key); |
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Session::clear($keyExpire); |
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return true; |
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} |
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/** |
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* This method is used to check the whitelist IP address access |
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*/ |
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public static function checkWhiteListIpAccess(){ |
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$logger = self::getLogger(); |
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$logger->debug('Validation of the IP address access ...'); |
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$logger->debug('Check if whitelist IP access is enabled in the configuration ...'); |
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$isEnable = get_config('white_list_ip_enable', false); |
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if($isEnable){ |
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$logger->info('Whitelist IP access is enabled in the configuration'); |
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$list = get_config('white_list_ip_addresses', array()); |
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if(! empty($list)){ |
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//Can't use Loader::functions() at this time because teh "Loader" library is loader after the security prossessing |
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require_once CORE_FUNCTIONS_PATH . 'function_user_agent.php'; |
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$ip = get_ip(); |
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if((count($list) == 1 && $list[0] == '*') || in_array($ip, $list)){ |
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$logger->info('IP address ' . $ip . ' allowed using the wildcard "*" or the full IP'); |
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//wildcard to access all ip address |
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return; |
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} |
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else{ |
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// go through all whitelisted ips |
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foreach ($list as $ipaddr) { |
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// find the wild card * in whitelisted ip (f.e. find position in "127.0.*" or "127*") |
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$wildcardPosition = strpos($ipaddr, '*'); |
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if ($wildcardPosition === false) { |
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// no wild card in whitelisted ip --continue searching |
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continue; |
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} |
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// cut ip at the position where we got the wild card on the whitelisted ip |
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// and add the wold card to get the same pattern |
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if (substr($ip, 0, $wildcardPosition) . '*' === $ipaddr) { |
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// f.e. we got |
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// ip "127.0.0.1" |
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// whitelisted ip "127.0.*" |
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// then we compared "127.0.*" with "127.0.*" |
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// return success |
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$logger->info('IP address ' . $ip . ' allowed using the wildcard like "x.x.x.*"'); |
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return; |
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} |
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} |
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$logger->warning('IP address ' . $ip . ' is not allowed to access to this application'); |
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show_error('Access to this application is not allowed'); |
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} |
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} |
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} |
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else{ |
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$logger->info('Whitelist IP access is not enabled in the configuration, ignore checking'); |
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} |
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} |
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} |
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tnhfw /
tnh-fw
