Display GUI Authorization Plug-in at Screen Saver Unlock

Question

Created Aug ’15

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I have a NSWindow that I display at the Login Window using a non-privileged mech with an auth plug-in.

This window can be displayed at the Login Window without any issues by placing an entry in the system.login.console portion of the authdb.

I want to do the same for the Screen Saver unlock screen. When I put the entry in the authenticate portion of the authdb, the Window does load but is not shown. I have an audio clip play inside of awakeFromNib so I know the window is launching. The runModalForWindow will block the login until I press enter. Once I press enter the modal is stopped and things continue as normal.

How do I get the window to display at the Screen Saver unlock screen?

Also, something similar happens with my window at the Fast User Switching prompt (system.login.console). Except I can see the window behind the gradient background, but can not interact with it.

I have tried many combinations of NSScreenSaverWindowLevel (-1 +1 etc):

[[self window] setCanBecomeVisibleWithoutLogin:TRUE];

[[self window] setLevel:NSScreenSaverWindowLevel + 1];

[[self window] orderFrontRegardless];

Here is a simple example of a window:

https://github.com/tburgin/MacTech_2015/blob/master/VerifyAuthPlugin/Views/Prompt/PromptWindowController.m

Boost

Answer 1

DTS Engineer OP

Apple

Aug ’15

In my experience debugging authorisation plug-ins is way too hard to attempt in the DevForums context. If no one else chimes in, I recommend you open a DTS tech support incident and I, or on of my colleagues, can help you out there.

ps One tip: make sure your window can become ‘key’, that is, it returns YES for the

canBecomeKeyWindow

property. If that’s not happening by default, you can fix it with with a (trivial) subclass of NSWindow.

Share and Enjoy
—
Quinn "The Eskimo!"
Apple Developer Relations, Developer Technical Support, Core OS/Hardware

let myEmail = "eskimo" + "1" + "@apple.com"

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Answer 2

mikegbduo OP

Mar ’17

Hey burgintj,

I'm curious if you ever found a solution to this issue. I've been trying quite a few things myself and working with DTS without much help.

Apple seems to suggest using a subclass of SFAuthorizationPluginView when displaying UI in the context of the screen saver authorization, but that doesn't seem suitable for our needs as it seems to require we re-implement the login window functionality.

0

Answer 3

tom_bur OP

Jun ’17

Subclass NSWindow and override canBecomeKeyWindow to return YES.

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