SplitStorage.php

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<?php
namespace ‪TYPO3\CMS\Rsaauth\Storage;
 
/*
 * This file is part of the TYPO3 CMS project.
 *
 * It is free software; you can redistribute it and/or modify it under
 * the terms of the GNU General Public License, either version 2
 * of the License, or any later version.
 *
 * For the full copyright and license information, please read the
 * LICENSE.txt file that was distributed with this source code.
 *
 * The TYPO3 project - inspiring people to share!
 */
 
use Symfony\Component\HttpFoundation\Cookie;
use ‪TYPO3\CMS\Core\Database\ConnectionPool;
use ‪TYPO3\CMS\Core\Http\CookieHeaderTrait;
use ‪TYPO3\CMS\Core\Utility\GeneralUtility;
use ‪TYPO3\CMS\Core\Utility\MathUtility;
 
class ‪SplitStorage extends ‪AbstractStorage
{
    use ‪CookieHeaderTrait;
 
    public function ‪__construct()
    {
        if (session_id() === '') {
            $options = [
                'cookie_httponly' => true,
                'cookie_secure' => GeneralUtility::getIndpEnv('TYPO3_SSL'),
            ];
            if ($this->‪hasSameSiteCookieSupport()) {
                $options['cookie_samesite'] = Cookie::SAMESITE_STRICT;
            }
            session_start($options);
            if (!$this->‪hasSameSiteCookieSupport()) {
                $this->‪resendCookieHeader([session_name()]);
            }
        }
    }
 
    public function get()
    {
        $result = null;
        list($keyId, $keyPart1) = $_SESSION['tx_rsaauth_key'];
        if (‪MathUtility::canBeInterpretedAsInteger($keyId)) {
            $this->‪removeExpiredKeys();
 
            // Get our value
            $keyValue = GeneralUtility::makeInstance(ConnectionPool::class)
                ->getConnectionForTable('tx_rsaauth_keys')
                ->select(['key_value'], 'tx_rsaauth_keys', ['uid' => $keyId])
                ->fetchColumn();
 
            if ($keyValue !== false) {
                $result = $keyPart1 . $keyValue;
            }
        }
 
        return $result;
    }
 
    public function ‪put($key)
    {
        $connection = GeneralUtility::makeInstance(ConnectionPool::class)->getConnectionForTable('tx_rsaauth_keys');
        if ($key == null) {
            // Remove existing key
            list($keyId) = $_SESSION['tx_rsaauth_key'];
            if (‪MathUtility::canBeInterpretedAsInteger($keyId)) {
                $connection->delete(
                    'tx_rsaauth_keys',
                    ['uid' => $keyId]
                );
                unset($_SESSION['tx_rsaauth_key']);
                if (empty($_SESSION)) {
                    $sessionName = session_name();
                    $sessionCookie = session_get_cookie_params();
                    session_destroy();
                    // By using setcookie with the second parameter set to false we actually delete the cookie
                    setcookie(
                        $sessionName,
                        false,
                        -1,
                        $sessionCookie['path'],
                        $sessionCookie['domain'],
                        $sessionCookie['secure']
                    );
                }
            }
        } else {
            // Add key
            // Get split point. First part is always smaller than the second
            // because it goes to the file system
            $keyLength = strlen($key);
            $splitPoint = rand((int)($keyLength / 10), (int)($keyLength / 2));
            // Get key parts
            $keyPart1 = substr($key, 0, $splitPoint);
            $keyPart2 = substr($key, $splitPoint);
            // Store part of the key in the database
            //
            // Notice: we may not use DataHandler below to insert key part into the
            // table because DataHandler requires a valid BE user!
            $time = ‪$GLOBALS['EXEC_TIME'];
            $connection->insert(
                'tx_rsaauth_keys',
                [
                    'pid' => 0,
                    'crdate' => $time,
                    'key_value' => $keyPart2
                ]
            );
            $keyId = $connection->lastInsertId('tx_rsaauth_keys');
            // Store another part in session
            $_SESSION['tx_rsaauth_key'] = [$keyId, $keyPart1];
        }
 
        $this->‪removeExpiredKeys();
    }
 
    protected function ‪removeExpiredKeys(): int
    {
        $queryBuilder = GeneralUtility::makeInstance(ConnectionPool::class)->getQueryBuilderForTable('tx_rsaauth_keys');
        $count = $queryBuilder->delete('tx_rsaauth_keys')
            ->where(
                $queryBuilder->expr()->lt(
                    'crdate',
                    $queryBuilder->createNamedParameter(‪$GLOBALS['EXEC_TIME'] - 30 * 60, \PDO::PARAM_INT)
                )
            )
            ->execute();
 
        return (int)$count;
    }
}