RE: Dialog box with GINA
From: Marco van Nieuwenhoven (MarcovanNieuwenhoven_at_discussions.microsoft.com)
Date: 05/11/05
- Next message: russell.thamm_at_dsto.defence.gov.au: "Single Point of Login"
- Previous message: Eric Slesar [MS]: "RE: Authorization Manager Win 2k3 or XP"
- In reply to: Nick: "RE: Dialog box with GINA"
- Messages sorted by: [ date ] [ thread ] [ subject ] [ author ] [ attachment ]
Date: Tue, 10 May 2005 22:18:04 -0700
Completely true. I would suggest that you try to avoid this construction, but
it does really work!
Inside the DlgProc you can wait for WM_NCDESTROY and then act on it. This is
effectively the only thing you need to look at. All other messages you can
ignore.
Marco.
"Nick" wrote:
> Thank Marco.
>
> So you are saying that I could create an invisible dialog using the Wlx
> functions and let this dialog wait for the WLX_WM_SAS meesages and kill all
> the dialogs it knows when one of the messages arrives.
>
> Regards
>
> Nick
>
> "Marco van Nieuwenhoven" wrote:
>
> > Hi Nick,
> >
> > You can create a dialog which is not visible with the wlx function, place at
> > coordinate 2000,2000 (Or higher when you are lucky ;-). On destroy of that
> > dialog there was a SAS event which should kill a the active dialog. In that
> > case you should end all present dialogs and return from the active gina
> > function. You only need to kill all visibe dialogs and do it as fast as
> > possible.
> >
> > grtx Marco.
> >
> > "Nick" wrote:
> > > Thanks Marco for your reply.
> > >
> > > But is there any work around to make the dialog "robust" instead of touching
> > > the source code of third party libraries.
> > >
> > > As documented in MSDN, WLX_WM_SAS messages are sent to dialogs that Gina
> > > uses. And the SAS type in wParam parameter of WLX_WM_SAS tells what kind of
> > > messages that the Gina dialog is receiving, such as timeouts or user log off.
> > > My question here is that if I handle these messages in dialogs implemented
> > > with normal windows functions, does that make these dialogs equivalent to
> > > dialogs implemented with the Wlx functions?
> > >
> > > Thanks
> > >
> > > Nick
> > >
> > > "Marco van Nieuwenhoven" wrote:
> > >
> > > > Hi Nick,
> > > >
> > > > The Wlx functions take care of the fact that when a SAS event comes that the
> > > > Wlx functions themselves close the active dialog and return the control to
> > > > WinLogon.exe. When having third party modules which pop up normal windows you
> > > > will run into problems. Try to overrule these situations and make your own
> > > > implementations of them using Wlx functions. This will give you a robust Gina
> > > > implementation.
> > > >
> > > > Marco van Nieuwenhoven.
> > > >
> > > > "Nick" wrote:
> > > > > Hi There,
> > > > >
> > > > > In custom GINA, if you want to create a dialog box, you will need to use the
> > > > > functions provided by winlogon, such as WlxMessageBox, WlxDialogBox,
> > > > > WlxDialogBoxIndirect, WlxDialogBoxParam and WlxDialogBoxIndirectParam.
> > > > >
> > > > > According to MSDN:
> > > > >
> > > > > "Winlogon provides a set of dialog support functions for the GINA. The GINA
> > > > > must use these functions instead of their Windows counterparts to ensure that
> > > > > the GINA and Winlogon maintain appropriate control over the dialog boxes.
> > > > > Failure to use the Winlogon versions of these functions could result in
> > > > > unauthorized users gaining access to the system."
> > > > >
> > > > > My question is that when my custom GINA uses third party library (such as
> > > > > PKCS#11) and that thrid party library pops up dialog (such as a dialog asking
> > > > > for finger print) which is not created using those functions, what would be
> > > > > the implication of this?
> > > > >
> > > > > How should I handle this in my custom GINA?
> > > > >
> > > > > Thanks in advance and your help will be greatly appreciated.
> > > > >
> > > > > Regards
> > > > >
> > > > > Nick
- Next message: russell.thamm_at_dsto.defence.gov.au: "Single Point of Login"
- Previous message: Eric Slesar [MS]: "RE: Authorization Manager Win 2k3 or XP"
- In reply to: Nick: "RE: Dialog box with GINA"
- Messages sorted by: [ date ] [ thread ] [ subject ] [ author ] [ attachment ]
Relevant Pages
|
