Argument parsing code for functions _ssl.enum_certificates() and _ssl.enum_crls() look not correct. 

    if (!PyArg_ParseTupleAndKeywords(args, kwds, "s|s:enum_certificates",
                                     kwlist, &store_name)) {
        return NULL;
    }

The format contains codes for two string arguments. But only one address (&store_name) is passed. And kwlist contains only one member, "store_name".

These functions are provided only on Windows, so I can't check what happen if call them with two string arguments. May be crash or memory corruption.