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https://bugs.launchpad.net/bugs/2084306

Title:
  Impossible to patch gnome shell to set a custom ShellUserVerifier

Status in gnome-shell package in Ubuntu:
  Fix Released
Status in gnome-shell source package in Noble:
  Fix Released

Bug description:
  [ Impact ]

  GNOME Shell in ubuntu is also used to show custom user verifiers in
  order to be able to login with specific authenticators, but since
  version 46 extensions providing this are not working anymore.

  This is due to the fact that it's not possible anymore to override the
  shell verifier from a GNOME extension.

  In particular, AWS's Amazon DCV requires an extension in order to login, and 
this does not work anymore in GNOME 46:
   - https://github.com/aws/dcv-gnome-shell-extension

  Without this extension, the shell native authenticator can't be
  bypassed in AWS installations when the web authentication has
  validated the user credentials.

  [ Test case ]

  To verify that the the function can be overridden, a new symbol has to
  be exported.

  Use the gnome shell looking glass (Alt+F2 -> 'lg' -> Enter) and paste
  this code:

  import('../gdm/authPrompt.js').then(m => Main.notify("Found",
  `${m.AuthPrompt.prototype._createUserVerifier ?? false}`))

  A notification should be shown with the function code, while it should
  not contain the word "false" only.

  This can also be verified installing the extension
  https://github.com/aws/dcv-gnome-shell-extension and it should load
  without errors in the journal

  [ Regression potential ]

  It's just a simple abstraction of few lines of code, so potential is
  very low, but potentially the GDM user verifier (and so the user list)
  may not be loaded.

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