oVirt is software for managing medium-to-large scale deployments of
virtual machine guests across multiple hosts. It supports a feature
where users can authenticate with a central server and get
transparently connected to a guest system and then automatically get logged
into that guest to an associated user session.
Guests using old versions of GDM support this single-sign-on capability
by means of a greeter plugin, using the old greeter's extension
API.
This commit adds similar support to the gnome-shell based login screen.
How it works:
* The OVirtCredentialsManager singleton listens for
'org.ovirt.vdsm.Credentials.UserAuthenticated'
D-Bus signal on the system bus from the
'org.ovirt.vdsm.Credentials'
bus name. The service that provides that bus name is called
the oVirt guest agent. It is also responsible for interacting
with the the central server to get user credentials.
* This UserAuthenticated signal passes, as a parameter, the a token
which needs to be passed through to the PAM service that is specifically
set up to integrate with the oVirt authentication architecture.
The singleton object keeps the token internally so it can be queried
later on.
* The OVirtCredentialsManager emits a signal 'user-authenticated' on
it's object once the dbus signal is triggered
* When the 'user-authenticated' signal is emitted, the login screen
tells GDM to start user verification using the PAM service. The
authentication stack of the service includes a PAM module
provided by oVirt that securely retrieves user credentials
from the oVirt guest agent. The PAM module then forwards those
credentials on to other modules in the stack so, e.g.,
the user's gnome keyring can be automatically unlocked.
* In case of the screen shield being visible, it also will react on that
'user-authenticated' signal and lift the shield.
In that case the login screen will check on construction time if
the signal has already been triggered, and a token is available.
If a token is available it will immediately trigger the functionality
as described above.
Signed-off-by: Vinzenz Feenstra <evilissimo@redhat.com>
https://bugzilla.gnome.org/show_bug.cgi?id=702162
Gdk uses Xwayland, so it only sees the events we forward to X11
clients. Instead, we can use the abstraction API provided by
mutter and get the right value automatically.
Also, we need to use MetaCursorTracker to handle the cursor
visibility too.
https://bugzilla.gnome.org/show_bug.cgi?id=707467
We slide the shield over it, so the animation is rarely seen, and
since no other actor is under the lock screen, the not-cleared stage
can show through, causing weird issues when trying to blend.
https://bugzilla.gnome.org/show_bug.cgi?id=706841
We show a lightbox when we suspend, to animate the fading to black
caused by turning off the monitors, but we need to hide it when
coming back, otherwise the user is just staring at a black screen
it until he moves the mouse or presses a key.
https://bugzilla.gnome.org/show_bug.cgi?id=706654
When locking manually (or locking with an animation), fade the
screen to black after a small timeout. This provides a smoother
experience, instead of abruptly turning off the screen.
https://bugzilla.gnome.org/show_bug.cgi?id=699112
This commit detects when a user inserts a smartcard,
and then initiates user verification using the gdm-smartcard
PAM service.
Likewise, if a user removes their smartcard, password verification
(or the user list depending on auth mode and configuration) are initiated
https://bugzilla.gnome.org/show_bug.cgi?id=683437
Make the lock dialog group reactive, to intercept any events
before they go to the actors below.
In the future, we may restructure our chrome to have a clear
layer system, but for now it fixes a security issue in the lock
screen (you can see the contents of the windows by dragging
if the screen was locked with the overview active)
https://bugzilla.gnome.org/show_bug.cgi?id=705840
Showing the new message at full size marks an abrubt change and looks
bad. Instead, gradually animate from 0px to full natural height.
Includes hacks to workaround flickering scrollbars while the animation
is in progress.
https://bugzilla.gnome.org/show_bug.cgi?id=687660
If that fails (which only ever happens in initial-setup mode, which
has no unlock or login dialog), we don't want to go ahead with
whatever we were doing.
https://bugzilla.gnome.org/show_bug.cgi?id=701848
If we don't remove the animation, we might leave a pending call
to _lockScreenShown() which would confuse our state tracking into
thinking we're active when we're not.
https://bugzilla.gnome.org/show_bug.cgi?id=700901
Right now when a user types their password to unlock their session
we end up getting an unlock signal from GDM right away. We then
proceed to deactivate the screensaver before the user has a chance
to read his messages.
This commit makes sure we clear out the message queue before processing
the deactivation request.
https://bugzilla.gnome.org/show_bug.cgi?id=704347
logind sends out an "unlock" signal separately when
verification completes and we already listen for that,
so we don't need to unlock on verification-complete, too.
https://bugzilla.gnome.org/show_bug.cgi?id=704347
We can't assume "isActive implies isModal", so there is a risk
of pushing a modal that nothing else will ever pop, because we
take the early return and don't activate the user active watch.
https://bugzilla.gnome.org/show_bug.cgi?id=700901
If the drag action ends after something else has put the screen shield
into a different state we can end up in an inconsistent screen shield
state where the whole thing is empty.
https://bugzilla.gnome.org/show_bug.cgi?id=703126
Currently the clipboard's contents may leak to unauthorized parties by
pasting into the unlock dialog's password entry and unmasking the entry.
Prevent this from happening by clearing the clipboard on lock.
https://bugzilla.gnome.org/show_bug.cgi?id=698922
Upon popMode, MessageTray will try readding all notifications
to their rightful parent, so we must tell NotificationBox to
relinquish them before st_bin_set_child() fails (leaving a dangling
child pointer and crashing at the next allocation)
https://bugzilla.gnome.org/show_bug.cgi?id=698812
There's large performance issues with both the blur and desaturation
that make the screen shield hard to use on slower computers, and this
has always been a temporary stopgap until the user can pick a different
image for the lock screen.
https://bugzilla.gnome.org/show_bug.cgi?id=696322
To make sure that the screen shield is shown before suspending, we
take a logind inhibitor and release it when the screen shield is
shown. As the screen shield is not only shown on suspend, we can end
up releasing the inhibitor independently from suspending (lock, idle),
in which case the screen might not be locked when we do suspend.
To fix, only release the inhibitor after showing the screen shield
when we are about to suspend.
https://bugzilla.gnome.org/show_bug.cgi?id=693708
With fallback mode gone, we can no longer rely on gnome-screensaver
being installed. Rather than handling three different cases (GDM,
gnome-screensaver, no lock), disable the lock functionality when
not running under GDM.
https://bugzilla.gnome.org/show_bug.cgi?id=693403
Previously, we would create one StBin per monitor, but each was positioned
at 0,0 and sized as the screen, so they would overlap and draw the box shadows
on top of the other backgrounds.
Instead, we need to size appropriately the bin, and then we need to position
the actual MetaBacgroundActor at 0,0, so add a flag to BackgroundManager
for this.
Also, get rid of MetaBackgroundGroup, they do nothing because the screenshield
is not a descendant of the MetaWindowGroup and because the widget in between
blocks the propagation of the visible region. At the same time, use a
widget, not a bin, because StBin requires you to set .child, not call add_child().
https://bugzilla.gnome.org/show_bug.cgi?id=694394
St.Bin() really only expects one child at a time, and the
BackgroundManager will add two. This can cause assertion
failures when destroying one of the background actors.
https://bugzilla.gnome.org/show_bug.cgi?id=694227
This commit updates the code to use mutter's new background
api, and changes the shell's startup animation to be closer
to the mockups.
Based on initial work by Giovanni Campagna
https://bugzilla.gnome.org/show_bug.cgi?id=682429
Right now we very abruptly kill the login screen
and start the users session without any transition
out.
This commit introduces a fade out of the dialog and
panels.
https://bugzilla.gnome.org/show_bug.cgi?id=694062
StBoxLayout always fills on the orthogonal direction, so the icon
becomes distorted as the layout grows to accomodate more details.
Instead, use a bin that aligns at the start.
https://bugzilla.gnome.org/show_bug.cgi?id=693822
The screenshield was not checking the return value of pushModal(), meaning
that it believed it was fully locked when it was not. Later, calling
popModal() would fail, causing an exception and blocking the unlock.
Now when we fail we include an explanatory message, pointing the user
to the actual cause of the issue.
https://bugzilla.gnome.org/show_bug.cgi?id=689106
The curtain animation looks jerky at its current speed, and more so if
we blank the screen immediately at the end. Make it a little slower and
it becomes more confortable.
https://bugzilla.gnome.org/show_bug.cgi?id=691964
If the screen lock is enabled, lock the screen before suspension.
When using systemd, this will cover both explicitly suspending from
the user menu and suspension initiated by g-s-d (lid close, power
button).
https://bugzilla.gnome.org/show_bug.cgi?id=686482
Now that we have an explicit active-but-not-locked state, we should
use different signals to notify changes. lock-status-changed is
renamed to active-changed, and a new locked-changed is introduced.
https://bugzilla.gnome.org/show_bug.cgi?id=693007
In time span between idle and lock the shield should behave like autologin,
but should prevent accidental reactivation (for example when using a touch
screen) by showing the curtain.
https://bugzilla.gnome.org/show_bug.cgi?id=692560
gnome-settings-daemon wants to use ActiveChanged to drive screen
blanking policies.
I also added two big comments that should cover all cases, to clear
up what's happening when the idle timers fire.
https://bugzilla.gnome.org/show_bug.cgi?id=691964
We must remove music notifications before we're destroyed, otherwise
they get destroyed with us.
Also, integrate a review comment I previously forgot.
https://bugzilla.gnome.org/show_bug.cgi?id=685926
The designs says that only music notifications should be shown in full
in the screenshield, the others should be either shown as a summary or
with very light details.
https://bugzilla.gnome.org/show_bug.cgi?id=685926
Allow message tray sources to provide a NotificationPolicy object,
that will configure how and if the source is displayed. For notification
daemon sources, this object is hooked to GSettings.
https://bugzilla.gnome.org/show_bug.cgi?id=685926
When you click Suspend from the user menu, the following things happen:
- we lock the screen internally by calling Main.screenShield.lock() and waiting
for lock-screen-shown
- logind emits a Lock signal, which causes us to lock again
- gnome-settings-daemon notices PrepareForSleep, and calls org.gnome.ScreenSaver.Lock,
just in case, so we lock once more
This means that, if you're lucky, you can see the curtain fall down multiple times,
as each .lock() call resets the animation.
https://bugzilla.gnome.org/show_bug.cgi?id=690858
org.gnome.desktop.screensaver.lock-delay contains the grace period
of the screensaver: if deactivated within that many seconds from the
start of the idle period, the shell should not prompt for a password.
This setting correspond to the "Lock screen after" combo in screen
and privacy panels.
https://bugzilla.gnome.org/show_bug.cgi?id=690766
As we now allow the ctrl-alt-tab popup on the lock screen, it should
be possible to navigate back from the top bar, so add the corresponding
elements to the switcher.
https://bugzilla.gnome.org/show_bug.cgi?id=688202
For now we just use it to assign an identifier to modal modes in
which we want to allow some keybindings, but we don't use it for
any actual filtering; we'll start doing this shortly.
https://bugzilla.gnome.org/show_bug.cgi?id=688202
If the session mode has no locking support, screenshield had code to
unlock automatically, but it did so by checking the return value of
the constructor, instead of checking if the constructor was actually
callable, so it would get a TypeError before reaching the check.
https://bugzilla.gnome.org/show_bug.cgi?id=687708
Switch from a ClutterDragAction to a ClutterGestureAction, that gives
us the velocity of mouse motion at each step, and use it to compute the
animation time for completing the hide gesture.
https://bugzilla.gnome.org/show_bug.cgi?id=682537
The background is the same as the normal desktop, so we blur and
desaturate it to clearly show that it's not the normal system state.
To do so, we don't use standard ClutterEffects, to avoid the FBO
indirection. Instead, we take advantage of MetaBackgroundActor support
for GLSL code and paint the shaded background texture directly.
https://bugzilla.gnome.org/show_bug.cgi?id=682536
If we lock before the user becomes active again, gnome-session will never
change presence from IDLE, and thus we'll never hide the lightbox.
Instead, install our own idle monitor.
https://bugzilla.gnome.org/show_bug.cgi?id=687020
Rationale:
- Getting something out of the way should be quick;
- Very few things in the real world move linearly so, linear
animations, especially for something as big and visible as this,
felt too artificial;
- Moving the curtain out should start slower to make it feel like
having weight (it fills the whole screen after all) but quickly
accelerate towards the end to make it snappy too.
https://bugzilla.gnome.org/show_bug.cgi?id=686745
If esc is pressed twice in succession in the unlock dialog, the curtain
is cancelled, but the dialog is cleared after the first esc cancels it,
and it's not destroyed and recreated.
https://bugzilla.gnome.org/show_bug.cgi?id=685441
If there are either no resident or persistent notifications, we'll
add some spacing for those boxes that may contain nothing. Make them
invisible to remove the spacing for those elements. It's possible
that we may want to be smarter about this in StBoxLayout to remove
spacing for zero-sized actors, but today is not the day.
https://bugzilla.gnome.org/show_bug.cgi?id=685919
While the unlock dialog is created early so that it appears below
the shield while the curtain slides up, it is destroyed immediately
when the shield slides back in.
Keep it around until the shield is down instead.
https://bugzilla.gnome.org/show_bug.cgi?id=684342
The screenshield requires gdm 3.5, which can be problematic in
jhbuild configurations, or distributions that don't use GDM as the display
manager. Allow transparent fallback to gnome-screensaver in that case.
https://bugzilla.gnome.org/show_bug.cgi?id=683060
A couple of people have walked up to me and asked how to get to the
unlock screen from the screen shield. This was partly addressed by
bug 682285, but all three people who asked me about this said they
tried the return key and were surprised when it didn't work.
It sort of makes sense, since the user is "enter"ing the computer or
"return"ing to it.
This commit makes enter work in addition to the existing escape key.
https://bugzilla.gnome.org/show_bug.cgi?id=683889
In gdm, we would attempt to become modal during the synchronous initialization,
and this would fail, as X prevents grabs on unmapped windows. Instead,
wait for the stage to be visible before becoming modal.
https://bugzilla.gnome.org/show_bug.cgi?id=683357
Have distinct session modes for the lock screen and the unlock dialog,
and rework the logic in ScreenShield to have the lock-screen mode stack
onto the unlock-dialog mode (where applicable)
https://bugzilla.gnome.org/show_bug.cgi?id=682542
