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<?php
declare(strict_types=1);
namespace u2flib_server;
/**
* Class Utility
*
* @package u2flib_server
*/
class Utility
{
* @return string
* @throws \Exception
public static function createChallenge(): string
$challenge = random_bytes(32);
return Convert::base64uEncode($challenge);
}
Yubico /
php-u2flib-server
