[PATCH] wbemprox: Return WBEM_E_ACCESS_DENIED from IEnumWbemClassObject::Next() if the object is empty.

[Hans Leidekker]

On Mon, 2019-07-08 at 20:09 +0800, Dmitry Timoshkov wrote:
> Dmitry Timoshkov <dmitry at baikal.ru> wrote:
> 
> > > > Could you suggest a place in Wine where a permission check could be added?
> > > 
> > > It's not clear to me if this is a general WMI thing or if it depends on the
> > > object being queried.
> > 
> > I'll copy WMI tests from dlls/wbemprox/tests to the MSI custom action tests
> > to get a picture how it works under Windows.
> 
> I've ported dlls/wbemprox/query.c to run from the MSI custom action,
> added strict checks for ::Next() return values everywhere, and while
> some of the queries fail ::Next() never returns WBEM_E_ACCESS_DENIED.
> It turned out that commenting out CoSetProxyBlanket() made the ::Next()
> calls for empty objects always return WBEM_E_ACCESS_DENIED instead of
> WBEM_S_FALSE/WBEM_S_TIMEDOUT. It's not obvious to me where the proposed
> access check should be added. Hans, do the test results add any clue to you?

Commenting out the CoSetProxyBlanket call in the wbemprox tests doesn't change
anything however. We still don't know what's different when running as a custom
action.