Do a reset at initialization time.
Technically, this isn't needed, since to start the process we'll need
to reset(); anyway after all the signals have connected, but this helps
the code be clean.
If we fail to verify, and don't have any pending messages, we'll retry
or cancel, which will cause a state change to VERIFYING or NOT_VERIFYING,
and then change the state again to VERIFICATION_FAILED, messing up our
state machine.
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
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
The duplication makes the function look a lot more complicated
than it actually is.
This commit moves the common code to a new _startService function.
https://bugzilla.gnome.org/show_bug.cgi?id=683437
Currently, fingerprint authentication is always a secondary thing.
If a user wants to swipe their finger when the computer is asking
for a password, so be it.
This commit paves the way for making fingerprint auth optionally
be the main way to authenticate. Currently there's no way to enable
this, but in a future commit will honor
enable-password-authentication=false
in gsettings.
https://bugzilla.gnome.org/show_bug.cgi?id=683437
Right now, the primary way a user logs in is with
a password. They can also swipe their finger, if their
fingerprint is enrolled, but it's expected the fingerprint
auth service won't ask questions the user has to respond to
by typing. As such, we ignore questions that comes from
anything but the main auth service: gdm-password.
In the future, if a user inserts a smartcard, we'll want
to treat the gdm-smartcard service as the main auth service,
and let any questions from it get to the user.
This commit tries to prepare for that eventuality by storing
the name of the default auth service away in a _defaultService variable
before verification has begun, and then later checking incoming
queries against that service instead of checking against
string 'gdm-password' directly.
Of course, right now, _defaultService is always gdm-password.
https://bugzilla.gnome.org/show_bug.cgi?id=683437
When a ShellUserVerifier is asked to verify a user at the login
screen it will transparently first try to reauthenticate the user
against an existing session and then fall back to logging a user
into a new session. The former is used for user switching.
It's useful to know which type of verification is happening, so
the next button can be made to say "Unlock" instead of "Sign In" when
a user is already signed in.
This commit exports a new "reauthenticating" property on the
ShellUserVerifier that the auth prompt checks when deciding which
label to use for its next button.
https://bugzilla.gnome.org/show_bug.cgi?id=704795
Right now there is a lot of duplicated code between the unlock
dialog and the login dialog.
This commit moves the login dialog's auth prompt to a separate
class, so that it can (in a subsequent commit) be used by the
unlock dialog.
https://bugzilla.gnome.org/show_bug.cgi?id=702308
this._clearMessageQueue() is a noop when this.hasPendingMessages is
false so calling it in that case doesn't make sense.
This commit drops that call.
https://bugzilla.gnome.org/show_bug.cgi?id=704347
Right now, if multiple messages come in, they just sort of
clobber each other.
This commit sets up a message queue, and introduces pauses
long enough for the user to hopefully be able to read those
messages.
https://bugzilla.gnome.org/show_bug.cgi?id=694688
Right, the common code between the login screen and
the unlock screen handles clearing the user verifier
when GDM sends a reset.
We don't actually always want to clear the messages on
reset in the unlock case, though, so doing it implicitly
is problematic.
This commit moves the clear() call from the common code
to the specific reset handlers.
https://bugzilla.gnome.org/show_bug.cgi?id=694688
In some deployments showing a user list at the login
screen is undesirable.
GDM's fallback login screen has a configuration key:
org.gnome.login-screen disable-user-list false
that causes the user-list to get hidden.
This commit adds similar functionality to the normal,
shell-based login screen.
Based on a series of patches by Marius Rieder.
https://bugzilla.gnome.org/show_bug.cgi?id=660660
If it is updated after checking, it counts the number of failures
not including the current one, so it allows one extra attempt. Instead,
by updating it before checking, we get the expected result of dropping the
curtain at the third password.
https://bugzilla.gnome.org/show_bug.cgi?id=687132
When the user has the entered the password for the second time
and clicked OK, clear messages from the previous attempt, so any
new failure is shown clearly.
https://bugzilla.gnome.org/show_bug.cgi?id=687132
Instead of leaving the login or unlock dialogs in an inconsistent state,
catch DBus errors and show an Authentication Error message. The error
details are logged in the session logs.
https://bugzilla.gnome.org/show_bug.cgi?id=683060
Instead of showing a notification, add a small message immediately
below the entry, and give the user two more attempts to login,
before going back to the welcome or lock screen.
https://bugzilla.gnome.org/show_bug.cgi?id=682544
Ensure that all async callbacks check and ignore G_IO_ERROR_CANCELLED.
Ensure that all runs of authentication have their own GCancellable, so
that .begin() can be called multiple times on the same user verifier.
Check for fingerprint reader when beginning authentication, and not
when reset by GDM.
https://bugzilla.gnome.org/show_bug.cgi?id=682544
Otherwise the second attempt tot login after pressing "escape" key
on the login "freeze" and raise an exception about IOError operation
cancelled.
https://bugzilla.gnome.org/show_bug.cgi?id=681537
The fingerprint message is useful for users that click their
names in the user list to let them know if fingerprint login
is available.
This same place on screen (below the login entry) can potentially
be used for other messages as well.
This commit changes the variable and style names surrounding
this feature to be more generic.
A subsequent commit will leverage this functionality to provide
a hint on how to log in to the local enterprise domain controller
(if relevant).
https://bugzilla.gnome.org/show_bug.cgi?id=681975
GetUserVerifier can only be called from the greeter session,
and fails with AccessDenied in all other cases. Also, calling it
hides the real error from OpenReauthenticationChannel, which
instead should be logged.
https://bugzilla.gnome.org/show_bug.cgi?id=680750
