<?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:----ODY4MTYyMTkzODgzODY5MCA5MDc4NTAxNzQ0NDQ2ODA5IDc1NTk0OTc1MTc4NTM2MTk=