def get_rpmsign_class(env):
    """
    Get signing class for KojiSignRPMs from environment settings.
    """
    class_path = env["rpmsign_class"]
    module_name, class_name = class_path.rsplit(".", 1)
    mod = __import__(module_name, globals(), locals(), [class_name], 0)
    cls = getattr(mod, class_name)
    return cls