To delete all the enrolled finger prints for a particular user.
We can already overwrite existing enrolled fingerprints, and there's
not really any point in dismissing just one fingerprint.
Add PolicyKit checks to all the public functions, grouped
in 2 main groups: Verify and Enroll
By default, only the user is able to enroll new fingers,
or verify themselves.
You need to be allowed at least one of those 2 actions
to be allowed to claim or release the device.
We also add a new SetUsername function, for administration
functions. Users will need to be authenticate as admins to
be allowed to change the username on which the actions will
be taken. Any prints loaded before the change of username will
be unloaded.
Get a PolicyKit context per-device, set up its main loop,
and steal more code from gnome-panel to check whether
the actions are allowed for a particular caller.
Last FromStorage variant killed, we need to make sure all
the functions now use the storage functions internally,
otherwise we won't be able to load from the place we save.
Mark all the methods on the device as async, so we
can get access to the associated DBusGMethodInvocation.
When claiming the device, remember the sender, and for every
API entry point, check that the sender is the same as the one
that made the original claim.
Trying to enroll a user whilst the device is already claimed
from another program will fail with:
** ERROR **: failed to claim device: Device was already claimed
This is the first step towards PolicyKit and multi-user support
