Scalr\Service\Aws\Client\SoapClient::_calculateDigest PHP Метод

    protected function _calculateDigest($digestAlgorithm, $data)
    {
        switch ($digestAlgorithm) {
            case self::SHA1:
                $alg = 'sha1';
                break;
            case self::SHA256:
                $alg = 'sha256';
                break;
            case self::SHA512:
                $alg = 'sha512';
                break;
            case self::RIPEMD160:
                $alg = 'ripemd160';
                break;
            default:
                throw new \Exception("Cannot validate digest: Unsupported Algorith <{$digestAlgorithm}>");
        }
        if (function_exists('hash')) {
            return base64_encode(hash($alg, $data, true));
        } elseif (function_exists('mhash')) {
            $alg = "MHASH_" . strtoupper($alg);
            return base64_encode(mhash(constant($alg), $data));
        } elseif ($alg === 'sha1') {
            return base64_encode(sha1($data, true));
        } else {
            throw new \Exception('SoapClient is unable to calculate a digest. Maybe you need the mhash library?');
        }
    }