phpseclib\Crypt\Common\PKCS8::getPBES1KDF PHP Метод

    static function getPBES1KDF($algo)
    {
        switch ($algo) {
            case 'pbeWithMD2AndDES-CBC':
            case 'pbeWithMD2AndRC2-CBC':
            case 'pbeWithMD5AndDES-CBC':
            case 'pbeWithMD5AndRC2-CBC':
            case 'pbeWithSHA1AndDES-CBC':
            case 'pbeWithSHA1AndRC2-CBC':
                return 'pbkdf1';
        }
        return 'pkcs12';
    }