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: / proc / thread-self / root / opt / psa / admin / plib / modules / grafana / vendor / lcobucci / jwt / src / Signer /

Filename : Hmac.php

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<?php

declare (strict_types=1);
namespace PleskGrafana\Lcobucci\JWT\Signer;

use PleskGrafana\Lcobucci\JWT\Signer;
use function hash_equals;
use function hash_hmac;
use function strlen;
abstract class Hmac implements Signer
{
    public final function sign(string $payload, Key $key) : string
    {
        $actualKeyLength = 8 * strlen($key->contents());
        $expectedKeyLength = $this->minimumBitsLengthForKey();
        if ($actualKeyLength < $expectedKeyLength) {
            throw InvalidKeyProvided::tooShort($expectedKeyLength, $actualKeyLength);
        }
        return hash_hmac($this->algorithm(), $payload, $key->contents(), \true);
    }
    public final function verify(string $expected, string $payload, Key $key) : bool
    {
        return hash_equals($expected, $this->sign($payload, $key));
    }
    /**
     * @internal
     *
     * @return non-empty-string
     */
    public abstract function algorithm() : string;
    /**
     * @internal
     *
     * @return positive-int
     */
    public abstract function minimumBitsLengthForKey() : int;
}