miladrahimi / php-jwt

namespace MiladRahimi\Jwt\Cryptography\Keys;

use MiladRahimi\Jwt\Exceptions\InvalidKeyException;

use Throwable;

class RsaPublicKey

{

    /**

     * @var mixed Key file resource handler

     */

    private $resource;

    protected ?string $id;

    /**

     * @throws InvalidKeyException

     */

    public function __construct(string $filePath, ?string $id = null)

    {

        try {

            $this->resource = openssl_pkey_get_public(file_get_contents(realpath($filePath)));

        } catch (Throwable $e) {

            throw new InvalidKeyException('Failed to read the key.', 0, $e);

        }

        if ($this->resource === false) {

            throw new InvalidKeyException(openssl_error_string());

        }

        $this->id = $id;

    }

    /**

     * @return mixed

     */

    public function getResource()

    {

        return $this->resource;

    }

}