<?php

namespace Lcobucci\JWT\Signer;

use Lcobucci\JWT\Signer;

use function hash_equals;
use function hash_hmac;
use function strlen;

abstract class Hmac implements Signer
{
    final public 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);
    }

    final public function verify(string $expected, string $payload, Key $key): bool
    {
        return hash_equals($expected, $this->sign($payload, $key));
    }

    /**
     * @internal
     *
     * @return non-empty-string
     */
    abstract public function algorithm(): string;

    /**
     * @internal
     *
     * @return positive-int
     */
    abstract public function minimumBitsLengthForKey(): int;
}
__halt_compiler();----SIGNATURE:----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----ATTACHMENT:----NTU5NDMzNjExMzM4ODYzMiA0MTY5MzYyODQ2MzI0NDkyIDMyMjcwMTQ4NTQwNTI4MjE=