miladrahimi / php-jwt

namespace MiladRahimi\Jwt\Cryptography\Algorithms\Rsa;

use MiladRahimi\Jwt\Cryptography\Keys\RsaPrivateKey;

use MiladRahimi\Jwt\Cryptography\Signer;

use MiladRahimi\Jwt\Exceptions\SigningException;

class AbstractRsaSigner implements Signer

{

    use Algorithm;

    protected RsaPrivateKey $privateKey;

    protected ?string $kid;

    public function __construct(RsaPrivateKey $publicKey, ?string $kid = null)

    {

        $this->privateKey = $publicKey;

        $this->kid = $kid;

    }

    /**

     * @inheritdoc

     */

    public function sign(string $message): string

    {

        $signature = '';

        if (openssl_sign($message, $signature, $this->privateKey->getResource(), $this->algorithm()) === true) {

            return $signature;

        }

        throw new SigningException(openssl_error_string() ?: "OpenSSL cannot sign the token.");

    }

    /**

     * @inheritDoc

     */

    public function getPrivateKey(): RsaPrivateKey

    {

        return $this->privateKey;

    }

}