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<?php |
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use Xmf\IPAddress; |
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/** |
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* XOOPS security handler |
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* |
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* You may not change or alter any portion of this comment or credits |
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* of supporting developers from this source code or any supporting source code |
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* which is considered copyrighted (c) material of the original comment or credit authors. |
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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. |
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* |
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* @author Kazumi Ono <[email protected]> |
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* @author Jan Pedersen <[email protected]> |
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* @author John Neill <[email protected]> |
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* @copyright (c) 2000-2025 XOOPS Project (https://xoops.org) |
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* @license GNU GPL 2 (https://www.gnu.org/licenses/gpl-2.0.html) |
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* @package kernel |
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* @since 2.0.0 |
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*/ |
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defined('XOOPS_ROOT_PATH') || exit('Restricted access'); |
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/** |
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* Class XoopsSecurity |
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*/ |
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class XoopsSecurity |
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{ |
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public $errors = []; |
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/** |
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* Check if there is a valid token in $_REQUEST[$name . '_REQUEST'] - can be expanded for more wide use, later (Mith) |
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* |
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* @param bool $clearIfValid whether to clear the token after validation |
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* @param string|false $token token to validate |
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* @param string $name name of session variable |
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* |
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* @return bool |
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*/ |
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public function check($clearIfValid = true, $token = false, $name = 'XOOPS_TOKEN') |
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{ |
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return $this->validateToken($token, $clearIfValid, $name); |
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} |
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/** |
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* Create a token in the user's session |
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* |
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* @param int|string $timeout time in seconds the token should be valid |
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* @param string $name name of session variable |
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* |
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* @return string token value |
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*/ |
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public function createToken($timeout = 0, $name = 'XOOPS_TOKEN') |
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{ |
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$this->garbageCollection($name); |
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if ($timeout == 0) { |
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$expire = @ini_get('session.gc_maxlifetime'); |
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$timeout = ($expire > 0) ? $expire : 900; |
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} |
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$token_id = md5(uniqid(mt_rand(), true)); |
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// save token data on the server |
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if (!isset($_SESSION[$name . '_SESSION'])) { |
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$_SESSION[$name . '_SESSION'] = []; |
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} |
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$token_data = [ |
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'id' => $token_id, |
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'expire' => time() + (int) $timeout, |
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]; |
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$_SESSION[$name . '_SESSION'][] = $token_data; |
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// Force update of session in base |
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// session_write_close(); |
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return md5($token_id . $_SERVER['HTTP_USER_AGENT'] . XOOPS_DB_PREFIX); |
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} |
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/** |
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* Check if a token is valid. If no token is specified, $_REQUEST[$name . '_REQUEST'] is checked |
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* |
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* @param string|false $token token to validate |
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* @param bool $clearIfValid whether to clear the token value if valid |
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* @param string $name session name to validate |
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* |
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* @return bool |
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*/ |
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public function validateToken($token = false, $clearIfValid = true, $name = 'XOOPS_TOKEN') |
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{ |
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// Optional: Ensure a session is active, keep this as a safeguard, but it’s likely unnecessary |
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if (session_status() !== PHP_SESSION_ACTIVE) { |
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session_start(); |
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} |
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global $xoopsLogger; |
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$token = ($token !== false) ? $token : ($_REQUEST[$name . '_REQUEST'] ?? ''); |
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if (empty($token) || empty($_SESSION[$name . '_SESSION'])) { |
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$xoopsLogger->addExtra('Token Validation', 'No valid token found in request/session'); |
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return false; |
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} |
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$validFound = false; |
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$token_data = &$_SESSION[$name . '_SESSION']; |
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foreach (array_keys($token_data) as $i) { |
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if ($token === md5($token_data[$i]['id'] . $_SERVER['HTTP_USER_AGENT'] . XOOPS_DB_PREFIX)) { |
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if ($this->filterToken($token_data[$i])) { |
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if ($clearIfValid) { |
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// token should be valid once, so clear it once validated |
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unset($token_data[$i]); |
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} |
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$xoopsLogger->addExtra('Token Validation', 'Valid token found'); |
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$validFound = true; |
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} else { |
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$str = 'Valid token expired'; |
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$this->setErrors($str); |
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$xoopsLogger->addExtra('Token Validation', $str); |
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} |
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} |
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} |
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if (!$validFound && !isset($str)) { |
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$str = 'No valid token found'; |
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$this->setErrors($str); |
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$xoopsLogger->addExtra('Token Validation', $str); |
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} |
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$this->garbageCollection($name); |
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return $validFound; |
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} |
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/** |
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* Clear all token values from user's session |
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* |
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* @param string $name session name |
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* |
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* @return void |
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*/ |
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public function clearTokens($name = 'XOOPS_TOKEN') |
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{ |
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$_SESSION[$name . '_SESSION'] = []; |
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} |
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/** |
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* Check whether a token value is expired or not |
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* |
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* @param string $token token |
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* |
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* @return bool |
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*/ |
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public function filterToken($token) |
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{ |
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return (!empty($token['expire']) && $token['expire'] >= time()); |
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} |
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/** |
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* Perform garbage collection, clearing expired tokens |
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* |
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* @param string $name session name |
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* |
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* @return void |
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*/ |
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public function garbageCollection($name = 'XOOPS_TOKEN') |
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{ |
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$sessionName = $name . '_SESSION'; |
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if (!empty($_SESSION[$sessionName]) && \is_array($_SESSION[$sessionName])) { |
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$_SESSION[$sessionName] = array_filter($_SESSION[$sessionName], [$this, 'filterToken']); |
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} |
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} |
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/** |
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* Check the user agent's HTTP REFERER against XOOPS_URL |
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* |
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* @param int $docheck 0 to not check the referer (used with XML-RPC), 1 to actively check it |
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* |
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* @return bool |
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*/ |
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public function checkReferer($docheck = 1) |
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{ |
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$ref = xoops_getenv('HTTP_REFERER'); |
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if ($docheck == 0) { |
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return true; |
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} |
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if ($ref == '') { |
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return false; |
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} |
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return !(strpos($ref, XOOPS_URL) !== 0); |
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} |
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/** |
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* Check superglobals for contamination |
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* |
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* @return void |
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**/ |
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public function checkSuperglobals() |
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{ |
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foreach ( |
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[ |
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'GLOBALS', |
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'_SESSION', |
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'HTTP_SESSION_VARS', |
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'_GET', |
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'HTTP_GET_VARS', |
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'_POST', |
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'HTTP_POST_VARS', |
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'_COOKIE', |
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'HTTP_COOKIE_VARS', |
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'_REQUEST', |
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'_SERVER', |
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'HTTP_SERVER_VARS', |
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'_ENV', |
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'HTTP_ENV_VARS', |
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'_FILES', |
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'HTTP_POST_FILES', |
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'xoopsDB', |
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'xoopsUser', |
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'xoopsUserId', |
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'xoopsUserGroups', |
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'xoopsUserIsAdmin', |
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'xoopsConfig', |
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'xoopsOption', |
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'xoopsModule', |
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'xoopsModuleConfig', |
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'xoopsRequestUri', |
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] as $bad_global) { |
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if (isset($_REQUEST[$bad_global])) { |
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header('Location: ' . XOOPS_URL . '/'); |
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exit(); |
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} |
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} |
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} |
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/** |
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* Check if visitor's IP address is banned |
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* Should be changed to return bool and let the action be up to the calling script |
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* |
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* @return void |
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*/ |
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public function checkBadips() |
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{ |
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global $xoopsConfig; |
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$addr = IPAddress::fromRequest(); |
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$ip = $addr->asReadable(); |
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if ($xoopsConfig['enable_badips'] == 1 && $ip != '0.0.0.0') { |
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foreach ($xoopsConfig['bad_ips'] as $bi) { |
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if (!empty($bi) && preg_match('/' . $bi . '/', $ip)) { |
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exit(); |
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} |
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} |
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} |
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} |
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/** |
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* Get the HTML code for a XoopsFormHiddenToken object - used in forms that do not use XoopsForm elements |
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* |
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* @param string $name session token name |
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* |
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* @return string |
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*/ |
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public function getTokenHTML($name = 'XOOPS_TOKEN') |
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{ |
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require_once XOOPS_ROOT_PATH . '/class/xoopsformloader.php'; |
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$token = new XoopsFormHiddenToken($name); |
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return $token->render(); |
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} |
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/** |
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* Add an error |
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* |
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* @param string $error message |
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* |
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* @return void |
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*/ |
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public function setErrors($error) |
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{ |
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$this->errors[] = trim($error); |
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} |
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/** |
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* Get generated errors |
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* |
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* @param bool $ashtml Format using HTML? |
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* |
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* @return array|string Array of array messages OR HTML string |
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*/ |
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public function &getErrors($ashtml = false) |
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{ |
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if (!$ashtml) { |
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return $this->errors; |
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} else { |
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$ret = ''; |
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if (count($this->errors) > 0) { |
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foreach ($this->errors as $error) { |
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$ret .= $error . '<br>'; |
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} |
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} |
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return $ret; |
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} |
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} |
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} |
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In general, usage of exit should be done with care and only when running in a scripting context like a CLI script.