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<?php
/**
* This file is part of the ramsey/uuid library
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*
* @copyright Copyright (c) Ben Ramsey <ben@benramsey.com>
* @license http://opensource.org/licenses/MIT MIT
*/
declare(strict_types=1);
namespace Ramsey\Uuid\Generator;
use Ramsey\Uuid\Exception\NameException;
use Ramsey\Uuid\UuidInterface;
use ValueError;
use function hash;
/**
* DefaultNameGenerator generates strings of binary data based on a namespace,
* name, and hashing algorithm
*/
class DefaultNameGenerator implements NameGeneratorInterface
{
/** @psalm-pure */
public function generate(UuidInterface $ns, string $name, string $hashAlgorithm): string
{
try {
/** @var string|bool $bytes */
$bytes = @hash($hashAlgorithm, $ns->getBytes() . $name, true);
} catch (ValueError $e) {
$bytes = false; // keep same behavior than PHP 7
}
if ($bytes === false) {
throw new NameException(sprintf(
'Unable to hash namespace and name with algorithm \'%s\'',
$hashAlgorithm
));
}
return (string) $bytes;
}
}
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