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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 MIT License (MIT) |
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* |
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* Copyright (c) 2017 TNH Framework |
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* |
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* Permission is hereby granted, free of charge, to any person obtaining a copy |
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* of this software and associated documentation files (the "Software"), to deal |
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* in the Software without restriction, including without limitation the rights |
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
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* copies of the Software, and to permit persons to whom the Software is |
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* furnished to do so, subject to the following conditions: |
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* |
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* The above copyright notice and this permission notice shall be included in all |
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* copies or substantial portions of the Software. |
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* |
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
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* SOFTWARE. |
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*/ |
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class Security extends BaseClass { |
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/** |
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* Construct new instance |
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*/ |
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public function __construct() { |
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parent::__construct(); |
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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 function generateCSRF() { |
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$this->logger->debug('Generation of CSRF ...'); |
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$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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$currentTime = time(); |
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$sessionInstance = get_instance()->session; |
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if ( |
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$sessionInstance->exists($key) |
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&& $sessionInstance->exists($keyExpire) |
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&& $sessionInstance->get($keyExpire) > $currentTime |
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) { |
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$this->logger->info('The CSRF token not yet expire just return it'); |
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return $sessionInstance->get($key); |
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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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$this->logger->info('The CSRF informations are listed below: ' |
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. 'key [' . $key . '], key expire [' . $keyExpire . '], ' |
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. 'expire time [' . $expire . '], token [' . $token . ']'); |
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$sessionInstance->set($keyExpire, $newTime); |
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$sessionInstance->set($key, $token); |
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return $sessionInstance->get($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 function validateCSRF() { |
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$this->logger->debug('Validation of CSRF ...'); |
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$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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$currentTime = time(); |
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$sessionInstance = get_instance()->session; |
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$this->logger->info('The CSRF informations are listed below: key [' . $key . '], key expire [' . $keyExpire . '], expire time [' . $expire . ']'); |
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if (!$sessionInstance->exists($key) || $sessionInstance->get($keyExpire) <= $currentTime) { |
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$this->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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$token = get_instance()->request->post($key); |
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if ($token !== $sessionInstance->get($key) || $sessionInstance->get($keyExpire) <= $currentTime) { |
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$this->logger->warning('The CSRF data [' . $token . '] is not valide may be attacker do his job'); |
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return false; |
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} |
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$this->logger->info('The CSRF data [' . $token . '] is valide the form data is safe continue'); |
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//remove the token from session and data |
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$sessionInstance->clear($key); |
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$sessionInstance->clear($keyExpire); |
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get_instance()->globalvar->removePost($key); |
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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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* @return boolean |
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*/ |
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public function checkWhiteListIpAccess() { |
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$this->logger->debug('Validation of the IP address access ...'); |
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$this->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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$this->logger->info('Whitelist IP access is not enabled in the configuration, ignore checking'); |
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return true; |
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} |
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$this->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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$this->logger->info('The list of whitelist IP is empty, ignore checking'); |
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return true; |
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} |
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//Can't use Loader::functions() at this time because teh "Loader" library is loader after the security prossessing |
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require_once CORE_FUNCTIONS_PATH . 'function_user_agent.php'; |
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$ip = get_ip(); |
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if ((count($list) == 1 && $list[0] == '*') || in_array($ip, $list)) { |
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$this->logger->info('IP address ' . $ip . ' is allowed using the wildcard "*" or the full IP address'); |
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//wildcard to access all ip address |
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return true; |
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} |
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// go through all whitelisted ips |
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foreach ($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) . '*' === $ipaddr) { |
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// f.e. we got |
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// ip "127.0.0.1" |
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// whitelisted ip "127.0.*" |
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// then we compared "127.0.*" with "127.0.*" |
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// return success |
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$this->logger->info('IP address ' . $ip . ' is allowed using the wildcard address like "x.x.x.*"'); |
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return true; |
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} |
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} |
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$this->logger->warning('IP address ' . $ip . ' is not allowed to access to this application'); |
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return false; |
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} |
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} |
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tnhfw /
tnh-fw
