ConsumableNonce.php

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<?php
 
declare(strict_types=1);
 
/*
 * 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!
 */
 
namespace ‪TYPO3\CMS\Core\Security\ContentSecurityPolicy;
 
use ‪TYPO3\CMS\Core\Domain\ConsumableString;
use ‪TYPO3\CMS\Core\Utility\StringUtility;
 
final class ‪ConsumableNonce extends ‪ConsumableString
{
    private const ‪MIN_BYTES = 40;
 
    public function ‪__construct(string $nonce = null)
    {
        if ($nonce === null || strlen($nonce) < self::MIN_BYTES) {
            $nonce = random_bytes(self::MIN_BYTES);
            $nonce = ‪StringUtility::base64urlEncode($nonce);
        }
        parent::__construct($nonce);
    }
}