diff options
Diffstat (limited to 'services/fxaccounts/FxAccountsWebChannel.sys.mjs')
| -rw-r--r-- | services/fxaccounts/FxAccountsWebChannel.sys.mjs | 756 |
1 files changed, 756 insertions, 0 deletions
diff --git a/services/fxaccounts/FxAccountsWebChannel.sys.mjs b/services/fxaccounts/FxAccountsWebChannel.sys.mjs new file mode 100644 index 0000000000..a231608473 --- /dev/null +++ b/services/fxaccounts/FxAccountsWebChannel.sys.mjs @@ -0,0 +1,756 @@ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +/** + * Firefox Accounts Web Channel. + * + * Uses the WebChannel component to receive messages + * about account state changes. + */ + +import { XPCOMUtils } from "resource://gre/modules/XPCOMUtils.sys.mjs"; + +const { + COMMAND_PROFILE_CHANGE, + COMMAND_LOGIN, + COMMAND_LOGOUT, + COMMAND_DELETE, + COMMAND_CAN_LINK_ACCOUNT, + COMMAND_SYNC_PREFERENCES, + COMMAND_CHANGE_PASSWORD, + COMMAND_FXA_STATUS, + COMMAND_PAIR_HEARTBEAT, + COMMAND_PAIR_SUPP_METADATA, + COMMAND_PAIR_AUTHORIZE, + COMMAND_PAIR_DECLINE, + COMMAND_PAIR_COMPLETE, + COMMAND_PAIR_PREFERENCES, + COMMAND_FIREFOX_VIEW, + FX_OAUTH_CLIENT_ID, + ON_PROFILE_CHANGE_NOTIFICATION, + PREF_LAST_FXA_USER, + WEBCHANNEL_ID, + log, + logPII, +} = ChromeUtils.import("resource://gre/modules/FxAccountsCommon.js"); + +const lazy = {}; + +ChromeUtils.defineESModuleGetters(lazy, { + CryptoUtils: "resource://services-crypto/utils.sys.mjs", + FxAccountsPairingFlow: "resource://gre/modules/FxAccountsPairing.sys.mjs", + FxAccountsStorageManagerCanStoreField: + "resource://gre/modules/FxAccountsStorage.sys.mjs", + PrivateBrowsingUtils: "resource://gre/modules/PrivateBrowsingUtils.sys.mjs", + Weave: "resource://services-sync/main.sys.mjs", + WebChannel: "resource://gre/modules/WebChannel.sys.mjs", +}); +XPCOMUtils.defineLazyGetter(lazy, "fxAccounts", () => { + return ChromeUtils.importESModule( + "resource://gre/modules/FxAccounts.sys.mjs" + ).getFxAccountsSingleton(); +}); +XPCOMUtils.defineLazyPreferenceGetter( + lazy, + "pairingEnabled", + "identity.fxaccounts.pairing.enabled" +); +XPCOMUtils.defineLazyPreferenceGetter( + lazy, + "separatePrivilegedMozillaWebContentProcess", + "browser.tabs.remote.separatePrivilegedMozillaWebContentProcess", + false +); +XPCOMUtils.defineLazyPreferenceGetter( + lazy, + "separatedMozillaDomains", + "browser.tabs.remote.separatedMozillaDomains", + "", + false, + val => val.split(",") +); +XPCOMUtils.defineLazyPreferenceGetter( + lazy, + "accountServer", + "identity.fxaccounts.remote.root", + null, + false, + val => Services.io.newURI(val) +); + +// These engines were added years after Sync had been introduced, they need +// special handling since they are system add-ons and are un-available on +// older versions of Firefox. +const EXTRA_ENGINES = ["addresses", "creditcards"]; + +/** + * A helper function that extracts the message and stack from an error object. + * Returns a `{ message, stack }` tuple. `stack` will be null if the error + * doesn't have a stack trace. + */ +function getErrorDetails(error) { + // Replace anything that looks like it might be a filepath on Windows or Unix + let cleanMessage = String(error) + .replace(/\\.*\\/gm, "[REDACTED]") + .replace(/\/.*\//gm, "[REDACTED]"); + let details = { message: cleanMessage, stack: null }; + + // Adapted from Console.sys.mjs. + if (error.stack) { + let frames = []; + for (let frame = error.stack; frame; frame = frame.caller) { + frames.push(String(frame).padStart(4)); + } + details.stack = frames.join("\n"); + } + + return details; +} + +/** + * Create a new FxAccountsWebChannel to listen for account updates + * + * @param {Object} options Options + * @param {Object} options + * @param {String} options.content_uri + * The FxA Content server uri + * @param {String} options.channel_id + * The ID of the WebChannel + * @param {String} options.helpers + * Helpers functions. Should only be passed in for testing. + * @constructor + */ +export function FxAccountsWebChannel(options) { + if (!options) { + throw new Error("Missing configuration options"); + } + if (!options.content_uri) { + throw new Error("Missing 'content_uri' option"); + } + this._contentUri = options.content_uri; + + if (!options.channel_id) { + throw new Error("Missing 'channel_id' option"); + } + this._webChannelId = options.channel_id; + + // options.helpers is only specified by tests. + XPCOMUtils.defineLazyGetter(this, "_helpers", () => { + return options.helpers || new FxAccountsWebChannelHelpers(options); + }); + + this._setupChannel(); +} + +FxAccountsWebChannel.prototype = { + /** + * WebChannel that is used to communicate with content page + */ + _channel: null, + + /** + * Helpers interface that does the heavy lifting. + */ + _helpers: null, + + /** + * WebChannel ID. + */ + _webChannelId: null, + /** + * WebChannel origin, used to validate origin of messages + */ + _webChannelOrigin: null, + + /** + * Release all resources that are in use. + */ + tearDown() { + this._channel.stopListening(); + this._channel = null; + this._channelCallback = null; + }, + + /** + * Configures and registers a new WebChannel + * + * @private + */ + _setupChannel() { + // if this.contentUri is present but not a valid URI, then this will throw an error. + try { + this._webChannelOrigin = Services.io.newURI(this._contentUri); + this._registerChannel(); + } catch (e) { + log.error(e); + throw e; + } + }, + + _receiveMessage(message, sendingContext) { + const { command, data } = message; + let shouldCheckRemoteType = + lazy.separatePrivilegedMozillaWebContentProcess && + lazy.separatedMozillaDomains.some(function (val) { + return ( + lazy.accountServer.asciiHost == val || + lazy.accountServer.asciiHost.endsWith("." + val) + ); + }); + let { currentRemoteType } = sendingContext.browsingContext; + if (shouldCheckRemoteType && currentRemoteType != "privilegedmozilla") { + log.error( + `Rejected FxA webchannel message from remoteType = ${currentRemoteType}` + ); + return; + } + + let browser = sendingContext.browsingContext.top.embedderElement; + switch (command) { + case COMMAND_PROFILE_CHANGE: + Services.obs.notifyObservers( + null, + ON_PROFILE_CHANGE_NOTIFICATION, + data.uid + ); + break; + case COMMAND_LOGIN: + this._helpers + .login(data) + .catch(error => this._sendError(error, message, sendingContext)); + break; + case COMMAND_LOGOUT: + case COMMAND_DELETE: + this._helpers + .logout(data.uid) + .catch(error => this._sendError(error, message, sendingContext)); + break; + case COMMAND_CAN_LINK_ACCOUNT: + let canLinkAccount = this._helpers.shouldAllowRelink(data.email); + + let response = { + command, + messageId: message.messageId, + data: { ok: canLinkAccount }, + }; + + log.debug("FxAccountsWebChannel response", response); + this._channel.send(response, sendingContext); + break; + case COMMAND_SYNC_PREFERENCES: + this._helpers.openSyncPreferences(browser, data.entryPoint); + break; + case COMMAND_PAIR_PREFERENCES: + if (lazy.pairingEnabled) { + let window = browser.ownerGlobal; + // We should close the FxA tab after we open our pref page + let selectedTab = window.gBrowser.selectedTab; + window.switchToTabHavingURI( + "about:preferences?action=pair#sync", + true, + { + ignoreQueryString: true, + replaceQueryString: true, + adoptIntoActiveWindow: true, + ignoreFragment: "whenComparing", + triggeringPrincipal: + Services.scriptSecurityManager.getSystemPrincipal(), + } + ); + // close the tab + window.gBrowser.removeTab(selectedTab); + } + break; + case COMMAND_FIREFOX_VIEW: + this._helpers.openFirefoxView(browser, data.entryPoint); + break; + case COMMAND_CHANGE_PASSWORD: + this._helpers + .changePassword(data) + .catch(error => this._sendError(error, message, sendingContext)); + break; + case COMMAND_FXA_STATUS: + log.debug("fxa_status received"); + + const service = data && data.service; + const isPairing = data && data.isPairing; + const context = data && data.context; + this._helpers + .getFxaStatus(service, sendingContext, isPairing, context) + .then(fxaStatus => { + let response = { + command, + messageId: message.messageId, + data: fxaStatus, + }; + this._channel.send(response, sendingContext); + }) + .catch(error => this._sendError(error, message, sendingContext)); + break; + case COMMAND_PAIR_HEARTBEAT: + case COMMAND_PAIR_SUPP_METADATA: + case COMMAND_PAIR_AUTHORIZE: + case COMMAND_PAIR_DECLINE: + case COMMAND_PAIR_COMPLETE: + log.debug(`Pairing command ${command} received`); + const { channel_id: channelId } = data; + delete data.channel_id; + const flow = lazy.FxAccountsPairingFlow.get(channelId); + if (!flow) { + log.warn(`Could not find a pairing flow for ${channelId}`); + return; + } + flow.onWebChannelMessage(command, data).then(replyData => { + this._channel.send( + { + command, + messageId: message.messageId, + data: replyData, + }, + sendingContext + ); + }); + break; + default: + log.warn("Unrecognized FxAccountsWebChannel command", command); + // As a safety measure we also terminate any pending FxA pairing flow. + lazy.FxAccountsPairingFlow.finalizeAll(); + break; + } + }, + + _sendError(error, incomingMessage, sendingContext) { + log.error("Failed to handle FxAccountsWebChannel message", error); + this._channel.send( + { + command: incomingMessage.command, + messageId: incomingMessage.messageId, + data: { + error: getErrorDetails(error), + }, + }, + sendingContext + ); + }, + + /** + * Create a new channel with the WebChannelBroker, setup a callback listener + * @private + */ + _registerChannel() { + /** + * Processes messages that are called back from the FxAccountsChannel + * + * @param webChannelId {String} + * Command webChannelId + * @param message {Object} + * Command message + * @param sendingContext {Object} + * Message sending context. + * @param sendingContext.browsingContext {BrowsingContext} + * The browsingcontext from which the + * WebChannelMessageToChrome was sent. + * @param sendingContext.eventTarget {EventTarget} + * The <EventTarget> where the message was sent. + * @param sendingContext.principal {Principal} + * The <Principal> of the EventTarget where the message was sent. + * @private + * + */ + let listener = (webChannelId, message, sendingContext) => { + if (message) { + log.debug("FxAccountsWebChannel message received", message.command); + if (logPII) { + log.debug("FxAccountsWebChannel message details", message); + } + try { + this._receiveMessage(message, sendingContext); + } catch (error) { + this._sendError(error, message, sendingContext); + } + } + }; + + this._channelCallback = listener; + this._channel = new lazy.WebChannel( + this._webChannelId, + this._webChannelOrigin + ); + this._channel.listen(listener); + log.debug( + "FxAccountsWebChannel registered: " + + this._webChannelId + + " with origin " + + this._webChannelOrigin.prePath + ); + }, +}; + +export function FxAccountsWebChannelHelpers(options) { + options = options || {}; + + this._fxAccounts = options.fxAccounts || lazy.fxAccounts; + this._weaveXPCOM = options.weaveXPCOM || null; + this._privateBrowsingUtils = + options.privateBrowsingUtils || lazy.PrivateBrowsingUtils; +} + +FxAccountsWebChannelHelpers.prototype = { + // If the last fxa account used for sync isn't this account, we display + // a modal dialog checking they really really want to do this... + // (This is sync-specific, so ideally would be in sync's identity module, + // but it's a little more seamless to do here, and sync is currently the + // only fxa consumer, so... + shouldAllowRelink(acctName) { + return ( + !this._needRelinkWarning(acctName) || this._promptForRelink(acctName) + ); + }, + + /** + * stores sync login info it in the fxaccounts service + * + * @param accountData the user's account data and credentials + */ + async login(accountData) { + // We don't act on customizeSync anymore, it used to open a dialog inside + // the browser to selecte the engines to sync but we do it on the web now. + log.debug("Webchannel is logging a user in."); + delete accountData.customizeSync; + + // Save requested services for later. + const requestedServices = accountData.services; + delete accountData.services; + + // the user has already been shown the "can link account" + // screen. No need to keep this data around. + delete accountData.verifiedCanLinkAccount; + + // Remember who it was so we can log out next time. + if (accountData.verified) { + this.setPreviousAccountNameHashPref(accountData.email); + } + + await this._fxAccounts.telemetry.recordConnection( + Object.keys(requestedServices || {}), + "webchannel" + ); + + // A sync-specific hack - we want to ensure sync has been initialized + // before we set the signed-in user. + // XXX - probably not true any more, especially now we have observerPreloads + // in FxAccounts.jsm? + let xps = + this._weaveXPCOM || + Cc["@mozilla.org/weave/service;1"].getService(Ci.nsISupports) + .wrappedJSObject; + await xps.whenLoaded(); + await this._fxAccounts._internal.setSignedInUser(accountData); + + if (requestedServices) { + // User has enabled Sync. + if (requestedServices.sync) { + const { offeredEngines, declinedEngines } = requestedServices.sync; + if (offeredEngines && declinedEngines) { + EXTRA_ENGINES.forEach(engine => { + if ( + offeredEngines.includes(engine) && + !declinedEngines.includes(engine) + ) { + // These extra engines are disabled by default. + Services.prefs.setBoolPref( + `services.sync.engine.${engine}`, + true + ); + } + }); + log.debug("Received declined engines", declinedEngines); + lazy.Weave.Service.engineManager.setDeclined(declinedEngines); + declinedEngines.forEach(engine => { + Services.prefs.setBoolPref(`services.sync.engine.${engine}`, false); + }); + } + log.debug("Webchannel is enabling sync"); + await xps.Weave.Service.configure(); + } + } + }, + + /** + * logout the fxaccounts service + * + * @param the uid of the account which have been logged out + */ + async logout(uid) { + let fxa = this._fxAccounts; + let userData = await fxa._internal.getUserAccountData(["uid"]); + if (userData && userData.uid === uid) { + await fxa.telemetry.recordDisconnection(null, "webchannel"); + // true argument is `localOnly`, because server-side stuff + // has already been taken care of by the content server + await fxa.signOut(true); + } + }, + + /** + * Check if `sendingContext` is in private browsing mode. + */ + isPrivateBrowsingMode(sendingContext) { + if (!sendingContext) { + log.error("Unable to check for private browsing mode, assuming true"); + return true; + } + + let browser = sendingContext.browsingContext.top.embedderElement; + const isPrivateBrowsing = + this._privateBrowsingUtils.isBrowserPrivate(browser); + log.debug("is private browsing", isPrivateBrowsing); + return isPrivateBrowsing; + }, + + /** + * Check whether sending fxa_status data should be allowed. + */ + shouldAllowFxaStatus(service, sendingContext, isPairing, context) { + // Return user data for any service in non-PB mode. In PB mode, + // only return user data if service==="sync" or is in pairing mode + // (as service will be equal to the OAuth client ID and not "sync"). + // + // This behaviour allows users to click the "Manage Account" + // link from about:preferences#sync while in PB mode and things + // "just work". While in non-PB mode, users can sign into + // Pocket w/o entering their password a 2nd time, while in PB + // mode they *will* have to enter their email/password again. + // + // The difference in behaviour is to try to match user + // expectations as to what is and what isn't part of the browser. + // Sync is viewed as an integral part of the browser, interacting + // with FxA as part of a Sync flow should work all the time. If + // Sync is broken in PB mode, users will think Firefox is broken. + // See https://bugzilla.mozilla.org/show_bug.cgi?id=1323853 + log.debug("service", service); + return ( + !this.isPrivateBrowsingMode(sendingContext) || + service === "sync" || + context === "fx_desktop_v3" || + isPairing + ); + }, + + /** + * Get fxa_status information. Resolves to { signedInUser: <user_data> }. + * If returning status information is not allowed or no user is signed into + * Sync, `user_data` will be null. + */ + async getFxaStatus(service, sendingContext, isPairing, context) { + let signedInUser = null; + + if ( + this.shouldAllowFxaStatus(service, sendingContext, isPairing, context) + ) { + const userData = await this._fxAccounts._internal.getUserAccountData([ + "email", + "sessionToken", + "uid", + "verified", + ]); + if (userData) { + signedInUser = { + email: userData.email, + sessionToken: userData.sessionToken, + uid: userData.uid, + verified: userData.verified, + }; + } + } + + return { + signedInUser, + clientId: FX_OAUTH_CLIENT_ID, + capabilities: { + multiService: true, + pairing: lazy.pairingEnabled, + engines: this._getAvailableExtraEngines(), + }, + }; + }, + + _getAvailableExtraEngines() { + return EXTRA_ENGINES.filter(engineName => { + try { + return Services.prefs.getBoolPref( + `services.sync.engine.${engineName}.available` + ); + } catch (e) { + return false; + } + }); + }, + + async changePassword(credentials) { + // If |credentials| has fields that aren't handled by accounts storage, + // updateUserAccountData will throw - mainly to prevent errors in code + // that hard-codes field names. + // However, in this case the field names aren't really in our control. + // We *could* still insist the server know what fields names are valid, + // but that makes life difficult for the server when Firefox adds new + // features (ie, new fields) - forcing the server to track a map of + // versions to supported field names doesn't buy us much. + // So we just remove field names we know aren't handled. + let newCredentials = { + device: null, // Force a brand new device registration. + // We force the re-encryption of the send tab keys using the new sync key after the password change + encryptedSendTabKeys: null, + }; + for (let name of Object.keys(credentials)) { + if ( + name == "email" || + name == "uid" || + lazy.FxAccountsStorageManagerCanStoreField(name) + ) { + newCredentials[name] = credentials[name]; + } else { + log.info("changePassword ignoring unsupported field", name); + } + } + await this._fxAccounts._internal.updateUserAccountData(newCredentials); + await this._fxAccounts._internal.updateDeviceRegistration(); + }, + + /** + * Get the hash of account name of the previously signed in account + */ + getPreviousAccountNameHashPref() { + try { + return Services.prefs.getStringPref(PREF_LAST_FXA_USER); + } catch (_) { + return ""; + } + }, + + /** + * Given an account name, set the hash of the previously signed in account + * + * @param acctName the account name of the user's account. + */ + setPreviousAccountNameHashPref(acctName) { + Services.prefs.setStringPref( + PREF_LAST_FXA_USER, + lazy.CryptoUtils.sha256Base64(acctName) + ); + }, + + /** + * Open Sync Preferences in the current tab of the browser + * + * @param {Object} browser the browser in which to open preferences + * @param {String} [entryPoint] entryPoint to use for logging + */ + openSyncPreferences(browser, entryPoint) { + let uri = "about:preferences"; + if (entryPoint) { + uri += "?entrypoint=" + encodeURIComponent(entryPoint); + } + uri += "#sync"; + + browser.loadURI(Services.io.newURI(uri), { + triggeringPrincipal: Services.scriptSecurityManager.getSystemPrincipal(), + }); + }, + + /** + * Open Firefox View in the browser's window + * + * @param {Object} browser the browser in whose window we'll open Firefox View + * @param {String} [entryPoint] entryPoint Optional string to use for logging + */ + openFirefoxView(browser, entryPoint) { + browser.ownerGlobal.FirefoxViewHandler.openTab(entryPoint); + }, + + /** + * If a user signs in using a different account, the data from the + * previous account and the new account will be merged. Ask the user + * if they want to continue. + * + * @private + */ + _needRelinkWarning(acctName) { + let prevAcctHash = this.getPreviousAccountNameHashPref(); + return ( + prevAcctHash && prevAcctHash != lazy.CryptoUtils.sha256Base64(acctName) + ); + }, + + /** + * Show the user a warning dialog that the data from the previous account + * and the new account will be merged. + * + * @private + */ + _promptForRelink(acctName) { + let sb = Services.strings.createBundle( + "chrome://browser/locale/syncSetup.properties" + ); + let continueLabel = sb.GetStringFromName("continue.label"); + let title = sb.GetStringFromName("relinkVerify.title"); + let description = sb.formatStringFromName("relinkVerify.description", [ + acctName, + ]); + let body = + sb.GetStringFromName("relinkVerify.heading") + "\n\n" + description; + let ps = Services.prompt; + let buttonFlags = + ps.BUTTON_POS_0 * ps.BUTTON_TITLE_IS_STRING + + ps.BUTTON_POS_1 * ps.BUTTON_TITLE_CANCEL + + ps.BUTTON_POS_1_DEFAULT; + + // If running in context of the browser chrome, window does not exist. + let pressed = Services.prompt.confirmEx( + null, + title, + body, + buttonFlags, + continueLabel, + null, + null, + null, + {} + ); + return pressed === 0; // 0 is the "continue" button + }, +}; + +var singleton; + +// The entry-point for this module, which ensures only one of our channels is +// ever created - we require this because the WebChannel is global in scope +// (eg, it uses the observer service to tell interested parties of interesting +// things) and allowing multiple channels would cause such notifications to be +// sent multiple times. +export var EnsureFxAccountsWebChannel = () => { + let contentUri = Services.urlFormatter.formatURLPref( + "identity.fxaccounts.remote.root" + ); + if (singleton && singleton._contentUri !== contentUri) { + singleton.tearDown(); + singleton = null; + } + if (!singleton) { + try { + if (contentUri) { + // The FxAccountsWebChannel listens for events and updates + // the state machine accordingly. + singleton = new FxAccountsWebChannel({ + content_uri: contentUri, + channel_id: WEBCHANNEL_ID, + }); + } else { + log.warn("FxA WebChannel functionaly is disabled due to no URI pref."); + } + } catch (ex) { + log.error("Failed to create FxA WebChannel", ex); + } + } +}; |