[Bug 2054835] Re: Xubuntu installer launcher is untrusted

[Darin]

To be trusted in Xfce, the file needs to be marked executable (seems
like it already is) and gio set string metadata::xfce-exe-checksum:
FILE_SHA256_CHECKSUM

The solution is here (also in some of the related links below):

https://forum.xfce.org/viewtopic.php?pid=70143#p70143

---

Xubuntu is now using ubuntu-desktop-bootstrap.

So, this command works for me:


desktop_launcher="/home/xubuntu/Desktop/ubuntu-desktop-bootstrap_ubuntu-desktop-bootstrap.desktop"

gio set -t string $desktop_launcher metadata::xfce-exe-checksum
"$(sha256sum $desktop_launcher | awk '{print $1}')"


The snap launcher may also need this at some point. The Settings Manager
and Whisker/App Menus don't seem to require this currently, but if they
do in the future or if it's launched from the file manager the same may
need to be applied to it:

snap_launcher="/var/lib/snapd/desktop/applications/ubuntu-desktop-
bootstrap_ubuntu-desktop-bootstrap.desktop"

---

Is this something that can be done in casper or ubuntu-desktop-
provision/bootstrap?

---

Also related/duplicate issues:

https://github.com/Xubuntu/xubuntu-default-
settings/issues/57#issuecomment-1416728186

https://bugs.launchpad.net/ubuntu/+source/xubuntu-default-
settings/+bug/1991389

https://bugs.launchpad.net/ubuntu/+source/ubiquity/+bug/1987958

** Bug watch added: github.com/Xubuntu/xubuntu-default-settings/issues #57
   https://github.com/Xubuntu/xubuntu-default-settings/issues/57

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https://bugs.launchpad.net/bugs/2054835

Title:
  Xubuntu installer launcher is untrusted

Status in subiquity:
  Invalid
Status in ubuntu-desktop-provision:
  New
Status in casper package in Ubuntu:
  Triaged

Bug description:
  Try install Xubuntu from iso dated 23feb click on the icon 'Install
  Xubuntu' received a message saying the application launcher is
  untrusted.

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