gnome-shell/js/gdm/util.js

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// -*- mode: js; js-indent-level: 4; indent-tabs-mode: nil -*-
const Clutter = imports.gi.Clutter;
const Gio = imports.gi.Gio;
const GLib = imports.gi.GLib;
const Lang = imports.lang;
const Mainloop = imports.mainloop;
const Signals = imports.signals;
const St = imports.gi.St;
const Batch = imports.gdm.batch;
const Fprint = imports.gdm.fingerprint;
const Main = imports.ui.main;
const Params = imports.misc.params;
const ShellEntry = imports.ui.shellEntry;
const SmartcardManager = imports.misc.smartcardManager;
const Tweener = imports.ui.tweener;
const PASSWORD_SERVICE_NAME = 'gdm-password';
const FINGERPRINT_SERVICE_NAME = 'gdm-fingerprint';
const SMARTCARD_SERVICE_NAME = 'gdm-smartcard';
const FADE_ANIMATION_TIME = 0.16;
const CLONE_FADE_ANIMATION_TIME = 0.25;
const LOGIN_SCREEN_SCHEMA = 'org.gnome.login-screen';
const PASSWORD_AUTHENTICATION_KEY = 'enable-password-authentication';
const FINGERPRINT_AUTHENTICATION_KEY = 'enable-fingerprint-authentication';
const SMARTCARD_AUTHENTICATION_KEY = 'enable-smartcard-authentication';
const BANNER_MESSAGE_KEY = 'banner-message-enable';
const BANNER_MESSAGE_TEXT_KEY = 'banner-message-text';
const ALLOWED_FAILURES_KEY = 'allowed-failures';
const LOGO_KEY = 'logo';
const DISABLE_USER_LIST_KEY = 'disable-user-list';
// Give user 16ms to read each character of a PAM message
const USER_READ_TIME = 16
const MessageType = {
NONE: 0,
ERROR: 1,
INFO: 2,
HINT: 3
};
function fadeInActor(actor) {
if (actor.opacity == 255 && actor.visible)
return null;
let hold = new Batch.Hold();
actor.show();
let [minHeight, naturalHeight] = actor.get_preferred_height(-1);
actor.opacity = 0;
actor.set_height(0);
Tweener.addTween(actor,
{ opacity: 255,
height: naturalHeight,
time: FADE_ANIMATION_TIME,
transition: 'easeOutQuad',
onComplete: function() {
this.set_height(-1);
hold.release();
},
});
return hold;
}
function fadeOutActor(actor) {
if (!actor.visible || actor.opacity == 0) {
actor.opacity = 0;
actor.hide();
return null;
}
let hold = new Batch.Hold();
Tweener.addTween(actor,
{ opacity: 0,
height: 0,
time: FADE_ANIMATION_TIME,
transition: 'easeOutQuad',
onComplete: function() {
this.hide();
this.set_height(-1);
hold.release();
},
});
return hold;
}
function cloneAndFadeOutActor(actor) {
// Immediately hide actor so its sibling can have its space
// and position, but leave a non-reactive clone on-screen,
// so from the user's point of view it smoothly fades away
// and reveals its sibling.
actor.hide();
let clone = new Clutter.Clone({ source: actor,
reactive: false });
Main.uiGroup.add_child(clone);
let [x, y] = actor.get_transformed_position();
clone.set_position(x, y);
let hold = new Batch.Hold();
Tweener.addTween(clone,
{ opacity: 0,
time: CLONE_FADE_ANIMATION_TIME,
transition: 'easeOutQuad',
onComplete: function() {
clone.destroy();
hold.release();
}
});
return hold;
}
const ShellUserVerifier = new Lang.Class({
Name: 'ShellUserVerifier',
_init: function(client, params) {
params = Params.parse(params, { reauthenticationOnly: false });
this._reauthOnly = params.reauthenticationOnly;
this._client = client;
this._settings = new Gio.Settings({ schema: LOGIN_SCREEN_SCHEMA });
this._settings.connect('changed',
Lang.bind(this, this._updateDefaultService));
this._updateDefaultService();
this._fprintManager = new Fprint.FprintManager();
this._smartcardManager = SmartcardManager.getSmartcardManager();
// We check for smartcards right away, since an inserted smartcard
// at startup should result in immediately initiating authentication.
// This is different than fingeprint readers, where we only check them
// after a user has been picked.
this._checkForSmartcard();
this._smartcardManager.connect('smartcard-inserted',
Lang.bind(this, this._checkForSmartcard));
this._smartcardManager.connect('smartcard-removed',
Lang.bind(this, this._checkForSmartcard));
this._messageQueue = [];
this._messageQueueTimeoutId = 0;
this.hasPendingMessages = false;
this.reauthenticating = false;
this._failCounter = 0;
},
begin: function(userName, hold) {
this._cancellable = new Gio.Cancellable();
this._hold = hold;
this._userName = userName;
this.reauthenticating = false;
this._checkForFingerprintReader();
if (userName) {
// If possible, reauthenticate an already running session,
// so any session specific credentials get updated appropriately
this._client.open_reauthentication_channel(userName, this._cancellable,
Lang.bind(this, this._reauthenticationChannelOpened));
} else {
this._client.get_user_verifier(this._cancellable, Lang.bind(this, this._userVerifierGot));
}
},
cancel: function() {
if (this._cancellable)
this._cancellable.cancel();
if (this._userVerifier) {
this._userVerifier.call_cancel_sync(null);
this.clear();
}
},
clear: function() {
if (this._cancellable) {
this._cancellable.cancel();
this._cancellable = null;
}
if (this._userVerifier) {
this._userVerifier.run_dispose();
this._userVerifier = null;
}
this._clearMessageQueue();
},
answerQuery: function(serviceName, answer) {
if (!this.hasPendingMessages) {
this._userVerifier.call_answer_query(serviceName, answer, this._cancellable, null);
} else {
let signalId = this.connect('no-more-messages',
Lang.bind(this, function() {
this.disconnect(signalId);
this._userVerifier.call_answer_query(serviceName, answer, this._cancellable, null);
}));
}
},
_getIntervalForMessage: function(message) {
// We probably could be smarter here
return message.length * USER_READ_TIME;
},
finishMessageQueue: function() {
if (!this.hasPendingMessages)
return;
this._messageQueue = [];
this.hasPendingMessages = false;
this.emit('no-more-messages');
},
_queueMessageTimeout: function() {
if (this._messageQueue.length == 0) {
this.finishMessageQueue();
return;
}
if (this._messageQueueTimeoutId != 0)
return;
let message = this._messageQueue.shift();
this.emit('show-message', message.text, message.type);
this._messageQueueTimeoutId = GLib.timeout_add(GLib.PRIORITY_DEFAULT,
message.interval,
Lang.bind(this, function() {
this._messageQueueTimeoutId = 0;
this._queueMessageTimeout();
}));
},
_queueMessage: function(message, messageType) {
let interval = this._getIntervalForMessage(message);
this.hasPendingMessages = true;
this._messageQueue.push({ text: message, type: messageType, interval: interval });
this._queueMessageTimeout();
},
_clearMessageQueue: function() {
this.finishMessageQueue();
if (this._messageQueueTimeoutId != 0) {
GLib.source_remove(this._messageQueueTimeoutId);
this._messageQueueTimeoutId = 0;
}
this.emit('show-message', null, MessageType.NONE);
},
_checkForFingerprintReader: function() {
this._haveFingerprintReader = false;
if (!this._settings.get_boolean(FINGERPRINT_AUTHENTICATION_KEY)) {
this._updateDefaultService();
return;
}
this._fprintManager.GetDefaultDeviceRemote(Gio.DBusCallFlags.NONE, this._cancellable, Lang.bind(this,
function(device, error) {
if (!error && device)
this._haveFingerprintReader = true;
this._updateDefaultService();
}));
},
_checkForSmartcard: function() {
let smartcardDetected;
if (!this._settings.get_boolean(SMARTCARD_AUTHENTICATION_KEY))
smartcardDetected = false;
else if (this.reauthenticating)
smartcardDetected = this._smartcardManager.hasInsertedLoginToken();
else
smartcardDetected = this._smartcardManager.hasInsertedTokens();
if (smartcardDetected != this.smartcardDetected) {
this.smartcardDetected = smartcardDetected;
if (this.smartcardDetected)
this._preemptingService = SMARTCARD_SERVICE_NAME;
else if (this._preemptingService == SMARTCARD_SERVICE_NAME)
this._preemptingService = null;
this.emit('smartcard-status-changed');
}
},
_reportInitError: function(where, error) {
logError(error, where);
this._hold.release();
this._queueMessage(_("Authentication error"), MessageType.ERROR);
this._verificationFailed(false);
},
_reauthenticationChannelOpened: function(client, result) {
try {
this._userVerifier = client.open_reauthentication_channel_finish(result);
} catch(e if e.matches(Gio.IOErrorEnum, Gio.IOErrorEnum.CANCELLED)) {
return;
} catch(e if e.matches(Gio.DBusError, Gio.DBusError.ACCESS_DENIED) &&
!this._reauthOnly) {
// Gdm emits org.freedesktop.DBus.Error.AccessDenied when there is
// no session to reauthenticate. Fall back to performing verification
// from this login session
client.get_user_verifier(this._cancellable, Lang.bind(this, this._userVerifierGot));
return;
} catch(e) {
this._reportInitError('Failed to open reauthentication channel', e);
return;
}
this.reauthenticating = true;
this._connectSignals();
this._beginVerification();
this._hold.release();
},
_userVerifierGot: function(client, result) {
try {
this._userVerifier = client.get_user_verifier_finish(result);
} catch(e if e.matches(Gio.IOErrorEnum, Gio.IOErrorEnum.CANCELLED)) {
return;
} catch(e) {
this._reportInitError('Failed to obtain user verifier', e);
return;
}
this._connectSignals();
this._beginVerification();
this._hold.release();
},
_connectSignals: function() {
this._userVerifier.connect('info', Lang.bind(this, this._onInfo));
this._userVerifier.connect('problem', Lang.bind(this, this._onProblem));
this._userVerifier.connect('info-query', Lang.bind(this, this._onInfoQuery));
this._userVerifier.connect('secret-info-query', Lang.bind(this, this._onSecretInfoQuery));
this._userVerifier.connect('conversation-stopped', Lang.bind(this, this._onConversationStopped));
this._userVerifier.connect('reset', Lang.bind(this, this._onReset));
this._userVerifier.connect('verification-complete', Lang.bind(this, this._onVerificationComplete));
},
_getForegroundService: function() {
if (this._preemptingService)
return this._preemptingService;
return this._defaultService;
},
serviceIsForeground: function(serviceName) {
return serviceName == this._getForegroundService();
},
serviceIsDefault: function(serviceName) {
return serviceName == this._defaultService;
},
_updateDefaultService: function() {
if (this._settings.get_boolean(PASSWORD_AUTHENTICATION_KEY))
this._defaultService = PASSWORD_SERVICE_NAME;
else if (this.smartcardDetected)
this._defaultService = SMARTCARD_SERVICE_NAME;
else if (this._haveFingerprintReader)
this._defaultService = FINGERPRINT_SERVICE_NAME;
},
_startService: function(serviceName) {
this._hold.acquire();
if (this._userName) {
this._userVerifier.call_begin_verification_for_user(serviceName,
this._userName,
this._cancellable,
Lang.bind(this, function(obj, result) {
try {
obj.call_begin_verification_for_user_finish(result);
} catch(e if e.matches(Gio.IOErrorEnum, Gio.IOErrorEnum.CANCELLED)) {
return;
} catch(e) {
this._reportInitError('Failed to start verification for user', e);
return;
}
this._hold.release();
}));
} else {
this._userVerifier.call_begin_verification(serviceName,
this._cancellable,
Lang.bind(this, function(obj, result) {
try {
obj.call_begin_verification_finish(result);
} catch(e if e.matches(Gio.IOErrorEnum, Gio.IOErrorEnum.CANCELLED)) {
return;
} catch(e) {
this._reportInitError('Failed to start verification', e);
return;
}
this._hold.release();
}));
}
},
_beginVerification: function() {
this._startService(this._getForegroundService());
if (this._userName && this._haveFingerprintReader && !this.serviceIsForeground(FINGERPRINT_SERVICE_NAME))
this._startService(FINGERPRINT_SERVICE_NAME);
},
_onInfo: function(client, serviceName, info) {
if (this.serviceIsForeground(serviceName)) {
this._queueMessage(info, MessageType.INFO);
} else if (serviceName == FINGERPRINT_SERVICE_NAME &&
this._haveFingerprintReader) {
// We don't show fingerprint messages directly since it's
// not the main auth service. Instead we use the messages
// as a cue to display our own message.
// Translators: this message is shown below the password entry field
// to indicate the user can swipe their finger instead
this._queueMessage(_("(or swipe finger)"), MessageType.HINT);
}
},
_onProblem: function(client, serviceName, problem) {
if (!this.serviceIsForeground(serviceName))
return;
this._queueMessage(problem, MessageType.ERROR);
},
_onInfoQuery: function(client, serviceName, question) {
if (!this.serviceIsForeground(serviceName))
return;
this.emit('ask-question', serviceName, question, '');
},
_onSecretInfoQuery: function(client, serviceName, secretQuestion) {
if (!this.serviceIsForeground(serviceName))
return;
this.emit('ask-question', serviceName, secretQuestion, '\u25cf');
},
_onReset: function() {
// Clear previous attempts to authenticate
this._failCounter = 0;
this._updateDefaultService();
this.emit('reset');
},
_onVerificationComplete: function() {
this.emit('verification-complete');
},
_cancelAndReset: function() {
this.cancel();
this._onReset();
},
_retry: function() {
this.begin(this._userName, new Batch.Hold());
},
_verificationFailed: function(retry) {
// For Not Listed / enterprise logins, immediately reset
// the dialog
// Otherwise, we allow ALLOWED_FAILURES attempts. After that, we
// go back to the welcome screen.
this._failCounter++;
let canRetry = retry && this._userName &&
this._failCounter < this._settings.get_int(ALLOWED_FAILURES_KEY);
if (canRetry) {
if (!this.hasPendingMessages) {
this._retry();
} else {
let signalId = this.connect('no-more-messages',
Lang.bind(this, function() {
this.disconnect(signalId);
this._retry();
}));
}
} else {
if (!this.hasPendingMessages) {
this._cancelAndReset();
} else {
let signalId = this.connect('no-more-messages',
Lang.bind(this, function() {
this.disconnect(signalId);
this._cancelAndReset();
}));
}
}
this.emit('verification-failed');
},
_onConversationStopped: function(client, serviceName) {
// if the password service fails, then cancel everything.
// But if, e.g., fingerprint fails, still give
// password authentication a chance to succeed
if (this.serviceIsForeground(serviceName)) {
this._verificationFailed(true);
}
},
});
Signals.addSignalMethods(ShellUserVerifier.prototype);