gnome-shell/js/gdm/util.js

769 lines
26 KiB
JavaScript

// -*- mode: js; js-indent-level: 4; indent-tabs-mode: nil -*-
/* exported BANNER_MESSAGE_KEY, BANNER_MESSAGE_TEXT_KEY, LOGO_KEY,
DISABLE_USER_LIST_KEY, fadeInActor, fadeOutActor, cloneAndFadeOutActor,
ShellUserVerifier */
const Clutter = imports.gi.Clutter;
const Gdm = imports.gi.Gdm;
const Gio = imports.gi.Gio;
const GLib = imports.gi.GLib;
const Signals = imports.misc.signals;
const Batch = imports.gdm.batch;
const OVirt = imports.gdm.oVirt;
const Vmware = imports.gdm.vmware;
const Main = imports.ui.main;
const { loadInterfaceXML } = imports.misc.fileUtils;
const Params = imports.misc.params;
const SmartcardManager = imports.misc.smartcardManager;
const FprintManagerIface = loadInterfaceXML('net.reactivated.Fprint.Manager');
const FprintManagerProxy = Gio.DBusProxy.makeProxyWrapper(FprintManagerIface);
const FprintDeviceIface = loadInterfaceXML('net.reactivated.Fprint.Device');
const FprintDeviceProxy = Gio.DBusProxy.makeProxyWrapper(FprintDeviceIface);
Gio._promisify(Gdm.Client.prototype, 'open_reauthentication_channel');
Gio._promisify(Gdm.Client.prototype, 'get_user_verifier');
Gio._promisify(Gdm.UserVerifierProxy.prototype,
'call_begin_verification_for_user');
Gio._promisify(Gdm.UserVerifierProxy.prototype, 'call_begin_verification');
var PASSWORD_SERVICE_NAME = 'gdm-password';
var FINGERPRINT_SERVICE_NAME = 'gdm-fingerprint';
var SMARTCARD_SERVICE_NAME = 'gdm-smartcard';
var CLONE_FADE_ANIMATION_TIME = 250;
var LOGIN_SCREEN_SCHEMA = 'org.gnome.login-screen';
var PASSWORD_AUTHENTICATION_KEY = 'enable-password-authentication';
var FINGERPRINT_AUTHENTICATION_KEY = 'enable-fingerprint-authentication';
var SMARTCARD_AUTHENTICATION_KEY = 'enable-smartcard-authentication';
var BANNER_MESSAGE_KEY = 'banner-message-enable';
var BANNER_MESSAGE_TEXT_KEY = 'banner-message-text';
var ALLOWED_FAILURES_KEY = 'allowed-failures';
var LOGO_KEY = 'logo';
var DISABLE_USER_LIST_KEY = 'disable-user-list';
// Give user 48ms to read each character of a PAM message
var USER_READ_TIME = 48;
const FINGERPRINT_ERROR_TIMEOUT_WAIT = 15;
/**
* Keep messages in order by priority
*
* @enum {number}
*/
var MessageType = {
NONE: 0,
HINT: 1,
INFO: 2,
ERROR: 3,
};
const FingerprintReaderType = {
NONE: 0,
PRESS: 1,
SWIPE: 2,
};
/**
* @param {Clutter.Actor} actor
*/
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();
const 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();
clone.ease({
opacity: 0,
duration: CLONE_FADE_ANIMATION_TIME,
mode: Clutter.AnimationMode.EASE_OUT_QUAD,
onComplete: () => {
clone.destroy();
hold.release();
},
});
return hold;
}
var ShellUserVerifier = class extends Signals.EventEmitter {
constructor(client, params) {
super();
params = Params.parse(params, { reauthenticationOnly: false });
this._reauthOnly = params.reauthenticationOnly;
this._client = client;
this._defaultService = null;
this._preemptingService = null;
this._settings = new Gio.Settings({ schema_id: LOGIN_SCREEN_SCHEMA });
this._settings.connect('changed',
this._updateDefaultService.bind(this));
this._updateDefaultService();
this._fprintManager = new FprintManagerProxy(Gio.DBus.system,
'net.reactivated.Fprint',
'/net/reactivated/Fprint/Manager',
null,
null,
Gio.DBusProxyFlags.DO_NOT_LOAD_PROPERTIES);
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 fingerprint readers, where we only check them
// after a user has been picked.
this.smartcardDetected = false;
this._checkForSmartcard();
this._smartcardManager.connectObject(
'smartcard-inserted', this._checkForSmartcard.bind(this),
'smartcard-removed', this._checkForSmartcard.bind(this), this);
this._messageQueue = [];
this._messageQueueTimeoutId = 0;
this.reauthenticating = false;
this._failCounter = 0;
this._unavailableServices = new Set();
this._credentialManagers = {};
this.addCredentialManager(OVirt.SERVICE_NAME, OVirt.getOVirtCredentialsManager());
this.addCredentialManager(Vmware.SERVICE_NAME, Vmware.getVmwareCredentialsManager());
}
addCredentialManager(serviceName, credentialManager) {
if (this._credentialManagers[serviceName])
return;
this._credentialManagers[serviceName] = credentialManager;
if (credentialManager.token) {
this._onCredentialManagerAuthenticated(credentialManager,
credentialManager.token);
}
credentialManager.connectObject('user-authenticated',
this._onCredentialManagerAuthenticated.bind(this), this);
}
removeCredentialManager(serviceName) {
let credentialManager = this._credentialManagers[serviceName];
if (!credentialManager)
return;
credentialManager.disconnectObject(this);
delete this._credentialManagers[serviceName];
}
get hasPendingMessages() {
return !!this._messageQueue.length;
}
get allowedFailures() {
return this._settings.get_int(ALLOWED_FAILURES_KEY);
}
get currentMessage() {
return this._messageQueue ? this._messageQueue[0] : null;
}
begin(userName, hold) {
this._cancellable = new Gio.Cancellable();
this._hold = hold;
this._userName = userName;
this.reauthenticating = false;
this._checkForFingerprintReader();
// If possible, reauthenticate an already running session,
// so any session specific credentials get updated appropriately
if (userName)
this._openReauthenticationChannel(userName);
else
this._getUserVerifier();
}
cancel() {
if (this._cancellable)
this._cancellable.cancel();
if (this._userVerifier) {
this._userVerifier.call_cancel_sync(null);
this.clear();
}
}
_clearUserVerifier() {
if (this._userVerifier) {
this._disconnectSignals();
this._userVerifier.run_dispose();
this._userVerifier = null;
if (this._userVerifierChoiceList) {
this._userVerifierChoiceList.run_dispose();
this._userVerifierChoiceList = null;
}
}
}
clear() {
if (this._cancellable) {
this._cancellable.cancel();
this._cancellable = null;
}
this._clearUserVerifier();
this._clearMessageQueue();
}
destroy() {
this.cancel();
this._settings.run_dispose();
this._settings = null;
this._smartcardManager.disconnectObject(this);
this._smartcardManager = null;
for (let service in this._credentialManagers)
this.removeCredentialManager(service);
}
selectChoice(serviceName, key) {
this._userVerifierChoiceList.call_select_choice(serviceName, key, this._cancellable, null);
}
async answerQuery(serviceName, answer) {
try {
await this._handlePendingMessages();
this._userVerifier.call_answer_query(serviceName, answer, this._cancellable, null);
} catch (e) {
if (!e.matches(Gio.IOErrorEnum, Gio.IOErrorEnum.CANCELLED))
logError(e);
}
}
_getIntervalForMessage(message) {
if (!message)
return 0;
// We probably could be smarter here
return message.length * USER_READ_TIME;
}
finishMessageQueue() {
if (!this.hasPendingMessages)
return;
this._messageQueue = [];
this.emit('no-more-messages');
}
increaseCurrentMessageTimeout(interval) {
if (!this._messageQueueTimeoutId && interval > 0)
this._currentMessageExtraInterval = interval;
}
_serviceHasPendingMessages(serviceName) {
return this._messageQueue.some(m => m.serviceName === serviceName);
}
_filterServiceMessages(serviceName, messageType) {
// This function allows to remove queued messages for the @serviceName
// whose type has lower priority than @messageType, replacing them
// with a null message that will lead to clearing the prompt once done.
if (this._serviceHasPendingMessages(serviceName))
this._queuePriorityMessage(serviceName, null, messageType);
}
_queueMessageTimeout() {
if (this._messageQueueTimeoutId != 0)
return;
const message = this.currentMessage;
delete this._currentMessageExtraInterval;
this.emit('show-message', message.serviceName, message.text, message.type);
this._messageQueueTimeoutId = GLib.timeout_add(GLib.PRIORITY_DEFAULT,
message.interval + (this._currentMessageExtraInterval | 0), () => {
this._messageQueueTimeoutId = 0;
if (this._messageQueue.length > 1) {
this._messageQueue.shift();
this._queueMessageTimeout();
} else {
this.finishMessageQueue();
}
return GLib.SOURCE_REMOVE;
});
GLib.Source.set_name_by_id(this._messageQueueTimeoutId, '[gnome-shell] this._queueMessageTimeout');
}
_queueMessage(serviceName, message, messageType) {
let interval = this._getIntervalForMessage(message);
this._messageQueue.push({ serviceName, text: message, type: messageType, interval });
this._queueMessageTimeout();
}
_queuePriorityMessage(serviceName, message, messageType) {
const newQueue = this._messageQueue.filter(m => {
if (m.serviceName !== serviceName || m.type >= messageType)
return m.text !== message;
return false;
});
if (!newQueue.includes(this.currentMessage))
this._clearMessageQueue();
this._messageQueue = newQueue;
this._queueMessage(serviceName, message, messageType);
}
_clearMessageQueue() {
this.finishMessageQueue();
if (this._messageQueueTimeoutId != 0) {
GLib.source_remove(this._messageQueueTimeoutId);
this._messageQueueTimeoutId = 0;
}
this.emit('show-message', null, null, MessageType.NONE);
}
async _checkForFingerprintReader() {
this._fingerprintReaderType = FingerprintReaderType.NONE;
if (!this._settings.get_boolean(FINGERPRINT_AUTHENTICATION_KEY) ||
this._fprintManager == null) {
this._updateDefaultService();
return;
}
try {
const [device] = await this._fprintManager.GetDefaultDeviceAsync(
Gio.DBusCallFlags.NONE, this._cancellable);
const fprintDeviceProxy = new FprintDeviceProxy(Gio.DBus.system,
'net.reactivated.Fprint',
device);
const fprintDeviceType = fprintDeviceProxy['scan-type'];
this._fingerprintReaderType = fprintDeviceType === 'swipe'
? FingerprintReaderType.SWIPE
: FingerprintReaderType.PRESS;
this._updateDefaultService();
} catch (e) {}
}
_onCredentialManagerAuthenticated(credentialManager, _token) {
this._preemptingService = credentialManager.service;
this.emit('credential-manager-authenticated');
}
_checkForSmartcard() {
let smartcardDetected;
if (!this._settings.get_boolean(SMARTCARD_AUTHENTICATION_KEY))
smartcardDetected = false;
else if (this._reauthOnly)
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(where, error, serviceName) {
logError(error, where);
this._hold.release();
this._queueMessage(serviceName, _('Authentication error'), MessageType.ERROR);
this._failCounter++;
this._verificationFailed(serviceName, false);
}
async _openReauthenticationChannel(userName) {
try {
this._clearUserVerifier();
this._userVerifier = await this._client.open_reauthentication_channel(
userName, this._cancellable);
} catch (e) {
if (e.matches(Gio.IOErrorEnum, Gio.IOErrorEnum.CANCELLED))
return;
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
this._getUserVerifier();
return;
}
this._reportInitError('Failed to open reauthentication channel', e);
return;
}
if (this._client.get_user_verifier_choice_list)
this._userVerifierChoiceList = this._client.get_user_verifier_choice_list();
else
this._userVerifierChoiceList = null;
this.reauthenticating = true;
this._connectSignals();
this._beginVerification();
this._hold.release();
}
async _getUserVerifier() {
try {
this._clearUserVerifier();
this._userVerifier =
await this._client.get_user_verifier(this._cancellable);
} catch (e) {
if (e.matches(Gio.IOErrorEnum, Gio.IOErrorEnum.CANCELLED))
return;
this._reportInitError('Failed to obtain user verifier', e);
return;
}
if (this._client.get_user_verifier_choice_list)
this._userVerifierChoiceList = this._client.get_user_verifier_choice_list();
else
this._userVerifierChoiceList = null;
this._connectSignals();
this._beginVerification();
this._hold.release();
}
_connectSignals() {
this._disconnectSignals();
this._userVerifier.connectObject(
'info', this._onInfo.bind(this),
'problem', this._onProblem.bind(this),
'info-query', this._onInfoQuery.bind(this),
'secret-info-query', this._onSecretInfoQuery.bind(this),
'conversation-stopped', this._onConversationStopped.bind(this),
'service-unavailable', this._onServiceUnavailable.bind(this),
'reset', this._onReset.bind(this),
'verification-complete', this._onVerificationComplete.bind(this),
this);
if (this._userVerifierChoiceList) {
this._userVerifierChoiceList.connectObject('choice-query',
this._onChoiceListQuery.bind(this), this);
}
}
_disconnectSignals() {
this._userVerifier?.disconnectObject(this);
this._userVerifierChoiceList?.disconnectObject(this);
}
_getForegroundService() {
if (this._preemptingService)
return this._preemptingService;
return this._defaultService;
}
serviceIsForeground(serviceName) {
return serviceName === this._getForegroundService();
}
foregroundServiceDeterminesUsername() {
for (let serviceName in this._credentialManagers) {
if (this.serviceIsForeground(serviceName))
return true;
}
return this.serviceIsForeground(SMARTCARD_SERVICE_NAME);
}
serviceIsDefault(serviceName) {
return serviceName == this._defaultService;
}
serviceIsFingerprint(serviceName) {
return this._fingerprintReaderType !== FingerprintReaderType.NONE &&
serviceName === FINGERPRINT_SERVICE_NAME;
}
_updateDefaultService() {
if (this._settings.get_boolean(PASSWORD_AUTHENTICATION_KEY))
this._defaultService = PASSWORD_SERVICE_NAME;
else if (this._settings.get_boolean(SMARTCARD_AUTHENTICATION_KEY))
this._defaultService = SMARTCARD_SERVICE_NAME;
else if (this._fingerprintReaderType !== FingerprintReaderType.NONE)
this._defaultService = FINGERPRINT_SERVICE_NAME;
if (!this._defaultService) {
log("no authentication service is enabled, using password authentication");
this._defaultService = PASSWORD_SERVICE_NAME;
}
}
async _startService(serviceName) {
this._hold.acquire();
try {
if (this._userName) {
await this._userVerifier.call_begin_verification_for_user(
serviceName, this._userName, this._cancellable);
} else {
await this._userVerifier.call_begin_verification(
serviceName, this._cancellable);
}
} catch (e) {
if (e.matches(Gio.IOErrorEnum, Gio.IOErrorEnum.CANCELLED))
return;
if (!this.serviceIsForeground(serviceName)) {
logError(e,
`Failed to start ${serviceName} for ${this._userName}`);
this._hold.release();
return;
}
this._reportInitError(
this._userName
? `Failed to start ${serviceName} verification for user`
: `Failed to start ${serviceName} verification`,
e, serviceName);
return;
}
this._hold.release();
}
_beginVerification() {
this._startService(this._getForegroundService());
if (this._userName &&
this._fingerprintReaderType !== FingerprintReaderType.NONE &&
!this.serviceIsForeground(FINGERPRINT_SERVICE_NAME))
this._startService(FINGERPRINT_SERVICE_NAME);
}
_onChoiceListQuery(client, serviceName, promptMessage, list) {
if (!this.serviceIsForeground(serviceName))
return;
this.emit('show-choice-list', serviceName, promptMessage, list.deepUnpack());
}
_onInfo(client, serviceName, info) {
if (this.serviceIsForeground(serviceName)) {
this._queueMessage(serviceName, info, MessageType.INFO);
} else if (this.serviceIsFingerprint(serviceName)) {
// 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.
if (this._fingerprintReaderType === FingerprintReaderType.SWIPE) {
// Translators: this message is shown below the password entry field
// to indicate the user can swipe their finger on the fingerprint reader
this._queueMessage(serviceName, _('(or swipe finger across reader)'),
MessageType.HINT);
} else {
// Translators: this message is shown below the password entry field
// to indicate the user can place their finger on the fingerprint reader instead
this._queueMessage(serviceName, _('(or place finger on reader)'),
MessageType.HINT);
}
}
}
_onProblem(client, serviceName, problem) {
const isFingerprint = this.serviceIsFingerprint(serviceName);
if (!this.serviceIsForeground(serviceName) && !isFingerprint)
return;
this._queuePriorityMessage(serviceName, problem, MessageType.ERROR);
if (isFingerprint) {
// pam_fprintd allows the user to retry multiple (maybe even infinite!
// times before failing the authentication conversation.
// We don't want this behavior to bypass the max-tries setting the user has set,
// so we count the problem messages to know how many times the user has failed.
// Once we hit the max number of failures we allow, it's time to failure the
// conversation from our side. We can't do that right away, however, because
// we may drop pending messages coming from pam_fprintd. In order to make sure
// the user sees everything, we queue the failure up to get handled in the
// near future, after we've finished up the current round of messages.
this._failCounter++;
if (!this._canRetry()) {
if (this._fingerprintFailedId)
GLib.source_remove(this._fingerprintFailedId);
const cancellable = this._cancellable;
this._fingerprintFailedId = GLib.timeout_add(GLib.PRIORITY_DEFAULT,
FINGERPRINT_ERROR_TIMEOUT_WAIT, () => {
this._fingerprintFailedId = 0;
if (!cancellable.is_cancelled())
this._verificationFailed(serviceName, false);
return GLib.SOURCE_REMOVE;
});
}
}
}
_onInfoQuery(client, serviceName, question) {
if (!this.serviceIsForeground(serviceName))
return;
this.emit('ask-question', serviceName, question, false);
}
_onSecretInfoQuery(client, serviceName, secretQuestion) {
if (!this.serviceIsForeground(serviceName))
return;
let token = null;
if (this._credentialManagers[serviceName])
token = this._credentialManagers[serviceName].token;
if (token) {
this.answerQuery(serviceName, token);
return;
}
this.emit('ask-question', serviceName, secretQuestion, true);
}
_onReset() {
// Clear previous attempts to authenticate
this._failCounter = 0;
this._unavailableServices.clear();
this._updateDefaultService();
this.emit('reset');
}
_onVerificationComplete() {
this.emit('verification-complete');
}
_cancelAndReset() {
this.cancel();
this._onReset();
}
_retry(serviceName) {
this._hold = new Batch.Hold();
this._connectSignals();
this._startService(serviceName);
}
_canRetry() {
return this._userName &&
(this._reauthOnly || this._failCounter < this.allowedFailures);
}
async _verificationFailed(serviceName, shouldRetry) {
if (serviceName === FINGERPRINT_SERVICE_NAME) {
if (this._fingerprintFailedId)
GLib.source_remove(this._fingerprintFailedId);
}
// For Not Listed / enterprise logins, immediately reset
// the dialog
// Otherwise, when in login mode we allow ALLOWED_FAILURES attempts.
// After that, we go back to the welcome screen.
this._filterServiceMessages(serviceName, MessageType.ERROR);
const doneTrying = !shouldRetry || !this._canRetry();
this.emit('verification-failed', serviceName, !doneTrying);
try {
if (doneTrying) {
this._disconnectSignals();
await this._handlePendingMessages();
this._cancelAndReset();
} else {
await this._handlePendingMessages();
this._retry(serviceName);
}
} catch (e) {
if (!e.matches(Gio.IOErrorEnum, Gio.IOErrorEnum.CANCELLED))
logError(e);
}
}
_handlePendingMessages() {
if (!this.hasPendingMessage)
return Promise.resolve();
const cancellable = this._cancellable;
return new Promise((resolve, reject) => {
let signalId = this.connect('no-more-messages', () => {
this.disconnect(signalId);
if (cancellable.is_cancelled())
reject(new GLib.Error(Gio.IOErrorEnum, Gio.IOErrorEnum.CANCELLED, 'Operation was cancelled'));
else
resolve();
});
});
}
_onServiceUnavailable(_client, serviceName, errorMessage) {
this._unavailableServices.add(serviceName);
if (!errorMessage)
return;
if (this.serviceIsForeground(serviceName) || this.serviceIsFingerprint(serviceName))
this._queueMessage(serviceName, errorMessage, MessageType.ERROR);
}
_onConversationStopped(client, serviceName) {
// If the login failed with the preauthenticated oVirt credentials
// then discard the credentials and revert to default authentication
// mechanism.
let foregroundService = Object.keys(this._credentialManagers).find(service =>
this.serviceIsForeground(service));
if (foregroundService) {
this._credentialManagers[foregroundService].token = null;
this._preemptingService = null;
this._verificationFailed(serviceName, false);
return;
}
this._filterServiceMessages(serviceName, MessageType.ERROR);
if (this._unavailableServices.has(serviceName))
return;
// 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._failCounter++;
this._verificationFailed(serviceName, true);
}
};