When we got an error, all the other HINT or INFO messages are not useful
anymore and delaying to show them is just a waste of time and may be
even wrong in scenarios with fast authentication devices.
An example are the fingerprint devices, where the user may touch the
sensor repeatedly while we may still show the "touch the sensor" hint
instead of notifying of possible errors.
So, in case we got an error override all the other errors coming from
the same service with lower priority.
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1683>
Once the verification has been stopped or has failed all the messages
that are not of error type are just not needed or wrong to show.
For example, in the fingerprint case we may still show the hint to swipe
or touch the device, while the fingerprint PAM service has already been
stopped.
So filter them by adding a new function that adds a null message to the
queue, overriding all the messages that have a lower priority.
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1683>
There are cases in which a service may want to override a message with
one coming with higher priority, for example an info or hint message
isn't useful anymore if we've already got an error message.
In the same way when a service has been stopped we don't care anymore
showing its info or hint messages, while it still may be relevant to show
errors.
An example is the fingerprint service that may emit errors quickly while
the hints messages should not be kept around when an error is already
queued or when the service has been stopped.
So, add function that allows to override queued messages based by their
type that follows this policy:
- Messages coming from different services are always preserved in
their original order.
- Messages (from the same service) with a priority equal or higher than
the last queued one are preserved.
- Messages matching completely the last queued are dropped in favor of
this one.
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1683>
It can be convenient to get the currently showing message in order to
replace or remove it in case it's not needed anymore.
So simplify the message queue handling by only depending on a single
local variable (_messageQueue) and redefining hasPendingMessages
depending on its content.
Now messages are kept in queue till they are not fully processed and the
first message is always the one currently shown.
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1683>
When a fingerprint failure event happens we may also soon receive a
conversation-stopped event with an error message (such as in the case
we hit the MAXRETRIES value), but this is going to be ignored in case we
are too quick in consider the first failure a verification-failed event
because that implies disconnecting from all the events and then ignoring
such signals.
To prevent this, add a small timeout before failing the verification so
that if we get a further event we will process it.
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1683>
In the case a service is not available (as it can be in the fingereprint
case when a supported reader is available but has not enrolled prints)
we were trying indefinitely to restart it, however this can lead to
troubles since commit 7a2e629b as when the service conversation was
stopped we had no way to figure out this case and we'd end up to
eventually fail the whole authentication.
However, in such cases the PAM services are expected to return a
PAM_AUTHINFO_UNAVAIL and gdm to handle it, emitting service-unavailable
signal.
So connect to ::service-unavailable and keep track of the unavailable
services so that we can avoid retrying with them.
In case such service is not the foreground one, we can just silently
ignore the error as we did before commit 7a2e629b, without bothering
failing the whole verification.
In case we got a valid error message on service-unavailable, we also
show it, this is normally not happening unless GDM isn't redirecting
here other kind of problems (such as MAXTRIES) which are supposed to
stop the authentication stopping any further retry.
Closes: https://gitlab.gnome.org/GNOME/gnome-shell/-/issues/3734
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1683>
Currently when the foreground service conversation stops we increase the
verification failed count and try to start it again, while if a
background service has been stopped we just ignore it.
This is causing a various number of issues, for example in the case of
the fingerprint authentication service, it is normally configured to die
after a timeout, and we end up never restarting it (while the UI still
keeps showing to the user the message about swipe/touch the device).
So, in such case let's just consider it a "soft" verification failure
that doesn't increase the failures count but will cause us to reset the
UI and try to restart the authentication (and so the affected service).
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1652>
Wiggle may make the error message to be visible for less time so provide
the auth prompt an API to increase the timeout to be used for showing a
message in some cases.
This could be reworked when we'll have a proper asyn wiggle function so
that we could just make the user verifier to "freeze", then await for
the wiggle transition to complete and eventually release the verifier.
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1652>
Currently whenever an authentication failure happens we wiggle the
entry, however this may not be related to the service which failed.
For example if the fingerprint authentication failed for whatever reason,
there's no point to wiggle the text input as it's something unrelated to it.
So, only apply the wiggle effect to the entry in case the failure is
coming from the querying service.
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1652>
By giving to the AuthPrompt information regarding the source service
name (and so the ability to know whether it's a foreground service) can
give it the ability to behave differently.
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1652>
Fingerprint PAM module can have multiple failures during a runtime
and we rely on the pam module configuration for the maximum allowed
retries.
However, while that setting should be always followed, we should never
ignore the login-screen's allowed-failures setting that can provide
a lower value.
So, once we have a fingerprint failure let's count it to increase our
internal fail counter, and when we've reached the limit we can emit a
verification-failed signal to our clients.
As per this we need also to ignore any further 'info' messages that we
could receive from the fingerprint service, as it may be configured to
handle more retries than us and they might arrive before we have
cancelled the verification session.
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1652>
Decouple the verification failure count increase from
_verificationFailed as there are some cases in which we may want to
increase it without emitting a verification-failed signal.
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1652>
When the login/lock screen is shown the error messages for background
services are always ignored.
However, in case the service is the fingerprint authentication method
we still want to be able to show error messages to inform the user
about what failed, and eventually that the max retries (that may be
different from the login screen configuration) has been reached.
This handles partially the design issue [1] related to the login/lock
screen fingerprint authentication.
Eventually we want to use pam extensions to use clearer and parse-able
messages, however in the case of the fingerprint service we can be sure
that the fprint PAM module will only send errors on auth failures.
[1] https://gitlab.gnome.org/Teams/Design/os-mockups/-/issues/56
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1652>
When verification failed using a specific authentication service we're
currently restarting the whole user authentication system, which leads
to lots of unneeded operations (reinitializing a new user verifier proxy,
restarting all the gdm workers with the relative PAM modules and so on).
And this makes also debugging of login problems more complicated, given
we're cluttering the journal with repeated data.
However, at reauthentication failure GDM has already set up for us an
user verifier that we can use reuse to start only the service that had a
failure. So when possible, just start a new service instead of rebooting
the whole authorization process.
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1622>
When retrying the authentication we should make sure that all the
previously initiated services are stopped in order to begin a new
authentication session with all the configured services.
Unfortunately at the current state we only dispose the currently used
user verifier, but we don't make it to stop all the relative gdm workers
and then they'll stay around potentially blocking any further usage of
them (as it happens with the fingerprint one, that has unique access to
the device).
So, cancel the currently running authentication before starting a new
one if we're explicitly retrying.
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1622>
In case a background service such as the fingerprint authentication
fails to start we'd just mark the whole authentication process as
failed.
Currently this may happen by just putting a wrong password when an user
has some fingerprints enrolled, the fingerprint gdm authentication
worker may take some time to restart leading to a failure and this is
currently also making the password authentication to fail:
JS ERROR: Failed to start gdm-fingerprint for u: Gio.DBusError:
GDBus.Error:org.freedesktop.DBus.Error.Spawn.Failed:
Could not create authentication helper process
_promisify/proto[asyncFunc]/</<@resource:///org/gnome/gjs/modules/core/overrides/Gio.js:435:45
### Promise created here: ###
_startService@resource:///org/gnome/shell/gdm/util.js:470:42
_beginVerification@resource:///org/gnome/shell/gdm/util.js:495:18
_getUserVerifier@resource:///org/gnome/shell/gdm/util.js:405:14
async*_openReauthenticationChannel@resource:///org/gnome/shell/gdm/util.js:378:22
async*begin@resource:///org/gnome/shell/gdm/util.js:194:18
_retry@resource:///org/gnome/shell/gdm/util.js:561:14
_verificationFailed/signalId<@resource:///org/gnome/shell/gdm/util.js:584:30
_emit@resource:///org/gnome/gjs/modules/core/_signals.js:133:47
finishMessageQueue@resource:///org/gnome/shell/gdm/util.js:268:14
_queueMessageTimeout@resource:///org/gnome/shell/gdm/util.js:273:18
_queueMessageTimeout/this._messageQueueTimeoutId<@resource:///org/gnome/shell/gdm/util.js:288:65
Given that background services are ignored even for queries or any kind
of message, we should not fail the authentication request unless the
default service fails.
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1622>
When a verification session has failed we may want to wait for the user
to have completed all the waiting queries and to have read all the
incoming messages, however during such time an user verifier should
not be allowed to queue further messages to the UI, as we're about to
completely stop the identification or start a new one.
Unfortunately this is not true because we're still connected to the
identifier signals, and so we may still show messages.
This is particularly true when using the fingerprint PAM module as it
may restart the authentication while we're in the process of stopping
it.
So, keep track of all the signals we've connected to, and disconnect on
verification failed and during cancel/clear operations.
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1622>
Answering a query may be delayed to the moment in which we've not any
more messages in the queue, however this case can also happen just after
we've cleared the UserVerifier and in such case we'd have nothing to
answer, but we currently throw an error:
JS ERROR: Exception in callback for signal: no-more-messages:
TypeError: this._userVerifier is null
answerQuery/signalId<@resource:///org/gnome/shell/gdm/util.js:249:17
_emit@resource:///org/gnome/gjs/modules/core/_signals.js:133:47
finishMessageQueue@resource:///org/gnome/shell/gdm/util.js:266:14
_clearMessageQueue@resource:///org/gnome/shell/gdm/util.js:301:14
clear@resource:///org/gnome/shell/gdm/util.js:223:14
cancel@resource:///org/gnome/shell/gdm/util.js:205:18
reset@resource:///org/gnome/shell/gdm/authPrompt.js:482:32
cancel@resource:///org/gnome/shell/gdm/authPrompt.js:569:14
vfunc_key_press_event@resource:///org/gnome/shell/gdm/authPrompt.js:128
So handle this case more gracefully keeping track of the current
cancellable and checking whether it is still valid before trying to answer
a query or do a delayed action.
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1622>
As per previous commit the user can cancel an ongoing authentication via
Escape key and that will always send the user back to the clock view in
lockscreen or user-selection view in login prompt.
However, we can be a little more permissive and don't switch view to be
able to restart the authentication without further action.
To avoid this to be abused though, we consider the user verification
cancellation via escape key to be a "soft-failure", so once the
configured "allowed-failures" gsettings value has been reached, we'd
just act as before, ignoring any further request (until we don't get
back to the user auth view).
In this way we still make brute-force attacks harder to do, while still
giving the well-behaving user some ability to fix mistakes.
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1622>
Escape key is supposed to cancel a verification, however if the user
already hit Enter to begin the authentication the Escape key won't work
until the verification completed.
This may be quite inconvenient when an user did a typo while writing and
wants to cancel the already started auth.
So, while authenticating (or in general while the entry is unsensitive)
give the key focus to the authpromt itself so that we can still get the
input events and cancel an user action.
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1622>
When a cancel event in the user lockscreen happens we first emit a reset
signal and immediately a cancelled one.
This lead to start a new gdm worker for each enabled authentication
method and then immediately to stop it.
As per the previous commit, we don't have anymore dangling gdm workers
around, but still we should not even start a new one in such case.
So, when the user explicitly cancelled the authentication session, first
emit a cancelled event and only emit a reset event with a begin request
if we are outside the lockscreen.
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1622>
When we cancel an user authentication via Escape key or cancel button on
AuthPrompt we reset the view and we emit a 'cancelled' signal that leads
to destroying the auth prompt and the user verifier.
However, the verifier may still have an operation in progress and its
completion may take some time (as in the case of gdm-fingerprint), but
we just leave the gdm worker running until its pam module completes
(potentially never) clearing and disposing its handle.
So, instead of just clearing the verify, actually cancel and clear it.
In case the user verifier is set, clearing the relevant data will happen
anyway as part of the cancel() call.
Ideally this would have been handled by gdm itself, but unfortunately we
can't fix it there because the verifier itself is a class generated by
gdbus-codegen, so we can't handle this automatically on disposal nor we
can automatically monitor when the caller proxy is stopped on our side.
Fixes: https://gitlab.gnome.org/GNOME/gnome-shell/-/issues/3654
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1622>
The reason this wasn't using the Gio.DBus.makeProxyWrapper() convenience API is that it passes custom flags to the proxy, and that wasn't supported by the wrapper at the time.
As this is now possible, this commit migrates us to the new API.
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1572>
Plain classes are private to their file, so accessing them from
another module results in the following warning:
That property was defined with 'let' or 'const' inside the module.
This was previously supported, but is not correct according to the
ES6 standard.
Fix by assigning the class to a public variable instead.
(Eventually switching to ES6 modules with proper imports/exports will
fix this as well)
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1512>
The purpose of password peeking is to spot and correct errors;
the latter isn't possible when the entry is non-editable, so
we can hide the password again while authentication is ongoing.
https://gitlab.gnome.org/GNOME/gnome-shell/-/issues/3138
At the moment, if a user switches to the login screen vt,
the login screen fades in whatever was on screen prior, and
then does a reset.
It makes more sense to reset first, so we fade in what the
user is going to interact with instead of what they interacted
with before.
Fixes: https://gitlab.gnome.org/GNOME/gnome-shell/-/issues/2997
The previous commit implemented a new CredentialManager interface to
facilitate adding additional providers for pre-authenticating the user
at the login screen.
This commit implements a new credential manager using that interface
for vmware deployments.
Closes: https://gitlab.gnome.org/GNOME/gnome-shell/issues/1983
Commit 4cda61a1 added support for pre-authenticated logins in
oVirt environments. This feature prevents a user from having
to type their password twice (once to the oVirt management machine,
and then immediately again in the provisioned guest running gnome-shell).
That feature is currently oVirt specific, but a similar feature would
be useful in non-oVirt based virt farm environments.
Toward that end, this commit generalizes the various aspects of the
oVirt integration code, so that it can be reused in a subsequent
commit for adding single sign on support in vmware deployments, too.
Closes: https://gitlab.gnome.org/GNOME/gnome-shell/issues/1983
ClutterActor provides the same function, but with a different return
value. So since we already switched to the ClutterActor implementation
in our C code, we can now safely remove st_widget_get_resource_scale()
and update the JS code that's still using the old API.
https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1287
We currently let the entry of the autoPrompt grab the key focus inside
setQuestion(), which is called from _onAskQuestion(), which is the
callback of the "ask-question" signal.
It seems that the "ask-question" signal isn't emitted again right after
the password-check failed, but a few seconds after that. Since we get
the "verification-failed" signal earlier than "ask-question" (right
after we know the check failed) and we also get a hint whether the entry
should be usable again with the canRetry argument, we can also grab key
focus to in the same step.
So do that by grabbing key focus when making the entry sensitive.
Fixes https://gitlab.gnome.org/GNOME/gnome-shell/-/issues/2655
We want the spinner to be centered with regard to the entry, but
constraining the height breaks that:
1. clutter_actor_allocate() is called with the available size
2. clutter_actor_update_constraints() then adjusts that according
to the constraints
3. clutter_actor_adjust_allocation() applies the margin/expand/align
properties.
The issue there is that 2. reduces the allocation to the desired size,
so there is no more extra space to distribute in 3.
We can fix this by either constraining everything (and rely on the
cancel button's alignment) or limit the constraint to the width. The
latter seems more appropriate, given that the constraint is only used
to center the entry horizontally.
https://gitlab.gnome.org/GNOME/gnome-shell/-/issues/2628
Promises make asynchronous operations easier to manage, in particular
when used through the async/await syntax that allows for asynchronous
code to closely resemble synchronous one.
gjs has included a Gio._promisify() helper for a while now, which
monkey-patches methods that follow GIO's async pattern to return a
Promise when called without a callback argument.
Use that to get rid of all those GAsyncReadyCallbacks!
https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1126
Commit 55b57421d changed signal handlers to the corresponding vfuncs,
but didn't always chain up as necessary. In most places this doesn't
matter, but at the very least the commit broke activating message list
items via the keyboard.
Add all (hopefully) the missing chain-ups to get the expected behavior
back.
https://gitlab.gnome.org/GNOME/gnome-shell/-/issues/2319
Visually the button is just an interactive label, so having the
interactive area extend to the empty space next to the label
is surprising.
Instead, left-align the whole button rather than just the label
inside, so the clickable area corresponds to the visible one.
https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/1046
We turned both the auth prompt's cancel button and the switch user
button into icon buttons now, which means they are completely cryptic
when using a screen reader.
Just use the previously used labels as accessible names, which has the
nice side effect of lowering the impact of the string freeze break.
https://gitlab.gnome.org/GNOME/gnome-shell/issues/2210
The button is hidden on the lock screen, so it shouldn't be allowed to
activate it, be it via click or keyboard. The latter is still possible
by keynaving to the button and hitting space/enter. Fix that by making
the button unfocusable when we make it unreactive.
https://gitlab.gnome.org/GNOME/gnome-shell/issues/2210
