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Diffstat (limited to 'services/fxaccounts/FxAccounts.sys.mjs')
| -rw-r--r-- | services/fxaccounts/FxAccounts.sys.mjs | 1620 |
1 files changed, 1620 insertions, 0 deletions
diff --git a/services/fxaccounts/FxAccounts.sys.mjs b/services/fxaccounts/FxAccounts.sys.mjs new file mode 100644 index 0000000000..98ba910db0 --- /dev/null +++ b/services/fxaccounts/FxAccounts.sys.mjs @@ -0,0 +1,1620 @@ +/* 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/. */ + +import { PromiseUtils } from "resource://gre/modules/PromiseUtils.sys.mjs"; + +import { CryptoUtils } from "resource://services-crypto/utils.sys.mjs"; +import { XPCOMUtils } from "resource://gre/modules/XPCOMUtils.sys.mjs"; +import { clearTimeout, setTimeout } from "resource://gre/modules/Timer.sys.mjs"; + +import { FxAccountsStorageManager } from "resource://gre/modules/FxAccountsStorage.sys.mjs"; + +const { + ERRNO_INVALID_AUTH_TOKEN, + ERROR_AUTH_ERROR, + ERROR_INVALID_PARAMETER, + ERROR_NO_ACCOUNT, + ERROR_TO_GENERAL_ERROR_CLASS, + ERROR_UNKNOWN, + ERROR_UNVERIFIED_ACCOUNT, + FXA_PWDMGR_PLAINTEXT_FIELDS, + FXA_PWDMGR_REAUTH_ALLOWLIST, + FXA_PWDMGR_SECURE_FIELDS, + FX_OAUTH_CLIENT_ID, + ON_ACCOUNT_STATE_CHANGE_NOTIFICATION, + ONLOGIN_NOTIFICATION, + ONLOGOUT_NOTIFICATION, + ON_PRELOGOUT_NOTIFICATION, + ONVERIFIED_NOTIFICATION, + ON_DEVICE_DISCONNECTED_NOTIFICATION, + POLL_SESSION, + PREF_ACCOUNT_ROOT, + PREF_LAST_FXA_USER, + SERVER_ERRNO_TO_ERROR, + log, + logPII, + logManager, +} = ChromeUtils.import("resource://gre/modules/FxAccountsCommon.js"); + +const lazy = {}; + +ChromeUtils.defineESModuleGetters(lazy, { + FxAccountsClient: "resource://gre/modules/FxAccountsClient.sys.mjs", + FxAccountsCommands: "resource://gre/modules/FxAccountsCommands.sys.mjs", + FxAccountsConfig: "resource://gre/modules/FxAccountsConfig.sys.mjs", + FxAccountsDevice: "resource://gre/modules/FxAccountsDevice.sys.mjs", + FxAccountsKeys: "resource://gre/modules/FxAccountsKeys.sys.mjs", + FxAccountsProfile: "resource://gre/modules/FxAccountsProfile.sys.mjs", + FxAccountsTelemetry: "resource://gre/modules/FxAccountsTelemetry.sys.mjs", + Preferences: "resource://gre/modules/Preferences.sys.mjs", +}); + +XPCOMUtils.defineLazyGetter(lazy, "mpLocked", () => { + return ChromeUtils.importESModule("resource://services-sync/util.sys.mjs") + .Utils.mpLocked; +}); + +XPCOMUtils.defineLazyGetter(lazy, "ensureMPUnlocked", () => { + return ChromeUtils.importESModule("resource://services-sync/util.sys.mjs") + .Utils.ensureMPUnlocked; +}); + +XPCOMUtils.defineLazyPreferenceGetter( + lazy, + "FXA_ENABLED", + "identity.fxaccounts.enabled", + true +); + +// An AccountState object holds all state related to one specific account. +// It is considered "private" to the FxAccounts modules. +// Only one AccountState is ever "current" in the FxAccountsInternal object - +// whenever a user logs out or logs in, the current AccountState is discarded, +// making it impossible for the wrong state or state data to be accidentally +// used. +// In addition, it has some promise-related helpers to ensure that if an +// attempt is made to resolve a promise on a "stale" state (eg, if an +// operation starts, but a different user logs in before the operation +// completes), the promise will be rejected. +// It is intended to be used thusly: +// somePromiseBasedFunction: function() { +// let currentState = this.currentAccountState; +// return someOtherPromiseFunction().then( +// data => currentState.resolve(data) +// ); +// } +// If the state has changed between the function being called and the promise +// being resolved, the .resolve() call will actually be rejected. +export function AccountState(storageManager) { + this.storageManager = storageManager; + this.inFlightTokenRequests = new Map(); + this.promiseInitialized = this.storageManager + .getAccountData() + .then(data => { + this.oauthTokens = data && data.oauthTokens ? data.oauthTokens : {}; + }) + .catch(err => { + log.error("Failed to initialize the storage manager", err); + // Things are going to fall apart, but not much we can do about it here. + }); +} + +AccountState.prototype = { + oauthTokens: null, + whenVerifiedDeferred: null, + whenKeysReadyDeferred: null, + + // If the storage manager has been nuked then we are no longer current. + get isCurrent() { + return this.storageManager != null; + }, + + abort() { + if (this.whenVerifiedDeferred) { + this.whenVerifiedDeferred.reject( + new Error("Verification aborted; Another user signing in") + ); + this.whenVerifiedDeferred = null; + } + if (this.whenKeysReadyDeferred) { + this.whenKeysReadyDeferred.reject( + new Error("Key fetching aborted; Another user signing in") + ); + this.whenKeysReadyDeferred = null; + } + this.inFlightTokenRequests.clear(); + return this.signOut(); + }, + + // Clobber all cached data and write that empty data to storage. + async signOut() { + this.cert = null; + this.keyPair = null; + this.oauthTokens = null; + this.inFlightTokenRequests.clear(); + + // Avoid finalizing the storageManager multiple times (ie, .signOut() + // followed by .abort()) + if (!this.storageManager) { + return; + } + const storageManager = this.storageManager; + this.storageManager = null; + + await storageManager.deleteAccountData(); + await storageManager.finalize(); + }, + + // Get user account data. Optionally specify explicit field names to fetch + // (and note that if you require an in-memory field you *must* specify the + // field name(s).) + getUserAccountData(fieldNames = null) { + if (!this.isCurrent) { + return Promise.reject(new Error("Another user has signed in")); + } + return this.storageManager.getAccountData(fieldNames).then(result => { + return this.resolve(result); + }); + }, + + async updateUserAccountData(updatedFields) { + if ("uid" in updatedFields) { + const existing = await this.getUserAccountData(["uid"]); + if (existing.uid != updatedFields.uid) { + throw new Error( + "The specified credentials aren't for the current user" + ); + } + // We need to nuke uid as storage will complain if we try and + // update it (even when the value is the same) + updatedFields = Cu.cloneInto(updatedFields, {}); // clone it first + delete updatedFields.uid; + } + if (!this.isCurrent) { + return Promise.reject(new Error("Another user has signed in")); + } + return this.storageManager.updateAccountData(updatedFields); + }, + + resolve(result) { + if (!this.isCurrent) { + log.info( + "An accountState promise was resolved, but was actually rejected" + + " due to a different user being signed in. Originally resolved" + + " with", + result + ); + return Promise.reject(new Error("A different user signed in")); + } + return Promise.resolve(result); + }, + + reject(error) { + // It could be argued that we should just let it reject with the original + // error - but this runs the risk of the error being (eg) a 401, which + // might cause the consumer to attempt some remediation and cause other + // problems. + if (!this.isCurrent) { + log.info( + "An accountState promise was rejected, but we are ignoring that " + + "reason and rejecting it due to a different user being signed in. " + + "Originally rejected with", + error + ); + return Promise.reject(new Error("A different user signed in")); + } + return Promise.reject(error); + }, + + // Abstractions for storage of cached tokens - these are all sync, and don't + // handle revocation etc - it's just storage (and the storage itself is async, + // but we don't return the storage promises, so it *looks* sync) + // These functions are sync simply so we can handle "token races" - when there + // are multiple in-flight requests for the same scope, we can detect this + // and revoke the redundant token. + + // A preamble for the cache helpers... + _cachePreamble() { + if (!this.isCurrent) { + throw new Error("Another user has signed in"); + } + }, + + // Set a cached token. |tokenData| must have a 'token' element, but may also + // have additional fields. + // The 'get' functions below return the entire |tokenData| value. + setCachedToken(scopeArray, tokenData) { + this._cachePreamble(); + if (!tokenData.token) { + throw new Error("No token"); + } + let key = getScopeKey(scopeArray); + this.oauthTokens[key] = tokenData; + // And a background save... + this._persistCachedTokens(); + }, + + // Return data for a cached token or null (or throws on bad state etc) + getCachedToken(scopeArray) { + this._cachePreamble(); + let key = getScopeKey(scopeArray); + let result = this.oauthTokens[key]; + if (result) { + // later we might want to check an expiry date - but we currently + // have no such concept, so just return it. + log.trace("getCachedToken returning cached token"); + return result; + } + return null; + }, + + // Remove a cached token from the cache. Does *not* revoke it from anywhere. + // Returns the entire token entry if found, null otherwise. + removeCachedToken(token) { + this._cachePreamble(); + let data = this.oauthTokens; + for (let [key, tokenValue] of Object.entries(data)) { + if (tokenValue.token == token) { + delete data[key]; + // And a background save... + this._persistCachedTokens(); + return tokenValue; + } + } + return null; + }, + + // A hook-point for tests. Returns a promise that's ignored in most cases + // (notable exceptions are tests and when we explicitly are saving the entire + // set of user data.) + _persistCachedTokens() { + this._cachePreamble(); + return this.updateUserAccountData({ oauthTokens: this.oauthTokens }).catch( + err => { + log.error("Failed to update cached tokens", err); + } + ); + }, +}; + +/* Given an array of scopes, make a string key by normalizing. */ +function getScopeKey(scopeArray) { + let normalizedScopes = scopeArray.map(item => item.toLowerCase()); + return normalizedScopes.sort().join("|"); +} + +function getPropertyDescriptor(obj, prop) { + return ( + Object.getOwnPropertyDescriptor(obj, prop) || + getPropertyDescriptor(Object.getPrototypeOf(obj), prop) + ); +} + +/** + * Copies properties from a given object to another object. + * + * @param from (object) + * The object we read property descriptors from. + * @param to (object) + * The object that we set property descriptors on. + * @param thisObj (object) + * The object that will be used to .bind() all function properties we find to. + * @param keys ([...]) + * The names of all properties to be copied. + */ +function copyObjectProperties(from, to, thisObj, keys) { + for (let prop of keys) { + // Look for the prop in the prototype chain. + let desc = getPropertyDescriptor(from, prop); + + if (typeof desc.value == "function") { + desc.value = desc.value.bind(thisObj); + } + + if (desc.get) { + desc.get = desc.get.bind(thisObj); + } + + if (desc.set) { + desc.set = desc.set.bind(thisObj); + } + + Object.defineProperty(to, prop, desc); + } +} + +/** + * The public API. + * + * TODO - *all* non-underscore stuff here should have sphinx docstrings so + * that docs magically appear on https://firefox-source-docs.mozilla.org/ + * (although |./mach doc| is broken on windows (bug 1232403) and on Linux for + * markh (some obscure npm issue he gave up on) - so later...) + */ +export class FxAccounts { + constructor(mocks = null) { + this._internal = new FxAccountsInternal(); + if (mocks) { + // it's slightly unfortunate that we need to mock the main "internal" object + // before calling initialize, primarily so a mock `newAccountState` is in + // place before initialize calls it, but we need to initialize the + // "sub-object" mocks after. This can probably be fixed, but whatever... + copyObjectProperties( + mocks, + this._internal, + this._internal, + Object.keys(mocks).filter(key => !["device", "commands"].includes(key)) + ); + } + this._internal.initialize(); + // allow mocking our "sub-objects" too. + if (mocks) { + for (let subobject of [ + "currentAccountState", + "keys", + "fxaPushService", + "device", + "commands", + ]) { + if (typeof mocks[subobject] == "object") { + copyObjectProperties( + mocks[subobject], + this._internal[subobject], + this._internal[subobject], + Object.keys(mocks[subobject]) + ); + } + } + } + } + + get commands() { + return this._internal.commands; + } + + static get config() { + return lazy.FxAccountsConfig; + } + + get device() { + return this._internal.device; + } + + get keys() { + return this._internal.keys; + } + + get telemetry() { + return this._internal.telemetry; + } + + _withCurrentAccountState(func) { + return this._internal.withCurrentAccountState(func); + } + + _withVerifiedAccountState(func) { + return this._internal.withVerifiedAccountState(func); + } + + _withSessionToken(func, mustBeVerified = true) { + return this._internal.withSessionToken(func, mustBeVerified); + } + + /** + * Returns an array listing all the OAuth clients connected to the + * authenticated user's account. This includes browsers and web sessions - no + * filtering is done of the set returned by the FxA server. + * + * @typedef {Object} AttachedClient + * @property {String} id - OAuth `client_id` of the client. + * @property {Number} lastAccessedDaysAgo - How many days ago the client last + * accessed the FxA server APIs. + * + * @returns {Array.<AttachedClient>} A list of attached clients. + */ + async listAttachedOAuthClients() { + // We expose last accessed times in 'days ago' + const ONE_DAY = 24 * 60 * 60 * 1000; + + return this._withSessionToken(async sessionToken => { + const response = await this._internal.fxAccountsClient.attachedClients( + sessionToken + ); + const attachedClients = response.body; + const timestamp = response.headers["x-timestamp"]; + const now = + timestamp !== undefined + ? new Date(parseInt(timestamp, 10)) + : Date.now(); + return attachedClients.map(client => { + const daysAgo = client.lastAccessTime + ? Math.max(Math.floor((now - client.lastAccessTime) / ONE_DAY), 0) + : null; + return { + id: client.clientId, + lastAccessedDaysAgo: daysAgo, + }; + }); + }); + } + + /** + * Get an OAuth token for the user. + * + * @param options + * { + * scope: (string/array) the oauth scope(s) being requested. As a + * convenience, you may pass a string if only one scope is + * required, or an array of strings if multiple are needed. + * ttl: (number) OAuth token TTL in seconds. + * } + * + * @return Promise.<string | Error> + * The promise resolves the oauth token as a string or rejects with + * an error object ({error: ERROR, details: {}}) of the following: + * INVALID_PARAMETER + * NO_ACCOUNT + * UNVERIFIED_ACCOUNT + * NETWORK_ERROR + * AUTH_ERROR + * UNKNOWN_ERROR + */ + async getOAuthToken(options = {}) { + try { + return await this._internal.getOAuthToken(options); + } catch (err) { + throw this._internal._errorToErrorClass(err); + } + } + + /** + * Remove an OAuth token from the token cache. Callers should call this + * after they determine a token is invalid, so a new token will be fetched + * on the next call to getOAuthToken(). + * + * @param options + * { + * token: (string) A previously fetched token. + * } + * @return Promise.<undefined> This function will always resolve, even if + * an unknown token is passed. + */ + removeCachedOAuthToken(options) { + return this._internal.removeCachedOAuthToken(options); + } + + /** + * Get details about the user currently signed in to Firefox Accounts. + * + * @return Promise + * The promise resolves to the credentials object of the signed-in user: + * { + * email: String: The user's email address + * uid: String: The user's unique id + * verified: Boolean: email verification status + * displayName: String or null if not known. + * avatar: URL of the avatar for the user. May be the default + * avatar, or null in edge-cases (eg, if there's an account + * issue, etc + * avatarDefault: boolean - whether `avatar` is specific to the user + * or the default avatar. + * } + * + * or null if no user is signed in. This function never fails except + * in pathological cases (eg, file-system errors, etc) + */ + getSignedInUser() { + // Note we don't return the session token, but use it to see if we + // should fetch the profile. + const ACCT_DATA_FIELDS = ["email", "uid", "verified", "sessionToken"]; + const PROFILE_FIELDS = ["displayName", "avatar", "avatarDefault"]; + return this._withCurrentAccountState(async currentState => { + const data = await currentState.getUserAccountData(ACCT_DATA_FIELDS); + if (!data) { + return null; + } + if (!lazy.FXA_ENABLED) { + await this.signOut(); + return null; + } + if (!this._internal.isUserEmailVerified(data)) { + // If the email is not verified, start polling for verification, + // but return null right away. We don't want to return a promise + // that might not be fulfilled for a long time. + this._internal.startVerifiedCheck(data); + } + + let profileData = null; + if (data.sessionToken) { + delete data.sessionToken; + try { + profileData = await this._internal.profile.getProfile(); + } catch (error) { + log.error("Could not retrieve profile data", error); + } + } + for (let field of PROFILE_FIELDS) { + data[field] = profileData ? profileData[field] : null; + } + // and email is a special case - if we have profile data we prefer the + // email from that, as the email we stored for the account itself might + // not have been updated if the email changed since the user signed in. + if (profileData && profileData.email) { + data.email = profileData.email; + } + return data; + }); + } + + /** + * Checks the status of the account. Resolves with Promise<boolean>, where + * true indicates the account status is OK and false indicates there's some + * issue with the account - either that there's no user currently signed in, + * the entire account has been deleted (in which case there will be no user + * signed in after this call returns), or that the user must reauthenticate (in + * which case `this.hasLocalSession()` will return `false` after this call + * returns). + * + * Typically used when some external code which uses, for example, oauth tokens + * received a 401 error using the token, or that this external code has some + * other reason to believe the account status may be bad. Note that this will + * be called automatically in many cases - for example, if calls to fetch the + * profile, or fetch keys, etc return a 401, there's no need to call this + * function. + * + * Because this hits the server, you should only call this method when you have + * good reason to believe the session very recently became invalid (eg, because + * you saw an auth related exception from a remote service.) + */ + checkAccountStatus() { + // Note that we don't use _withCurrentAccountState here because that will + // cause an exception to be thrown if we end up signing out due to the + // account not existing, which isn't what we want here. + let state = this._internal.currentAccountState; + return this._internal.checkAccountStatus(state); + } + + /** + * Checks if we have a valid local session state for the current account. + * + * @return Promise + * Resolves with a boolean, with true indicating that we appear to + * have a valid local session, or false if we need to reauthenticate + * with the content server to obtain one. + * Note that this only checks local state, although typically that's + * OK, because we drop the local session information whenever we detect + * we are in this state. However, see checkAccountStatus() for a way to + * check the account and session status with the server, which can be + * considered the canonical, albiet expensive, way to determine the + * status of the account. + */ + hasLocalSession() { + return this._withCurrentAccountState(async state => { + let data = await state.getUserAccountData(["sessionToken"]); + return !!(data && data.sessionToken); + }); + } + + /** Returns a promise that resolves to true if we can currently connect (ie, + * sign in, or re-connect after a password change) to a Firefox Account. + * If this returns false, the caller can assume that some UI was shown + * which tells the user why we could not connect. + * + * Currently, the primary password being locked is the only reason why + * this returns false, and in this scenario, the primary password unlock + * dialog will have been shown. + * + * This currently doesn't need to return a promise, but does so that + * future enhancements, such as other explanatory UI which requires + * async can work without modification of the call-sites. + */ + static canConnectAccount() { + return Promise.resolve(!lazy.mpLocked() || lazy.ensureMPUnlocked()); + } + + /** + * Send a message to a set of devices in the same account + * + * @param deviceIds: (null/string/array) The device IDs to send the message to. + * If null, will be sent to all devices. + * + * @param excludedIds: (null/string/array) If deviceIds is null, this may + * list device IDs which should not receive the message. + * + * @param payload: (object) The payload, which will be JSON.stringified. + * + * @param TTL: How long the message should be retained before it is discarded. + */ + // XXX - used only by sync to tell other devices that the clients collection + // has changed so they should sync asap. The API here is somewhat vague (ie, + // "an object"), but to be useful across devices, the payload really needs + // formalizing. We should try and do something better here. + notifyDevices(deviceIds, excludedIds, payload, TTL) { + return this._internal.notifyDevices(deviceIds, excludedIds, payload, TTL); + } + + /** + * Resend the verification email for the currently signed-in user. + * + */ + resendVerificationEmail() { + return this._withSessionToken((token, currentState) => { + this._internal.startPollEmailStatus(currentState, token, "start"); + return this._internal.fxAccountsClient.resendVerificationEmail(token); + }, false); + } + + async signOut(localOnly) { + // Note that we do not use _withCurrentAccountState here, otherwise we + // end up with an exception due to the user signing out before the call is + // complete - but that's the entire point of this method :) + return this._internal.signOut(localOnly); + } + + // XXX - we should consider killing this - the only reason it is public is + // so that sync can change it when it notices the device name being changed, + // and that could probably be replaced with a pref observer. + updateDeviceRegistration() { + return this._withCurrentAccountState(_ => { + return this._internal.updateDeviceRegistration(); + }); + } + + // we should try and kill this too. + whenVerified(data) { + return this._withCurrentAccountState(_ => { + return this._internal.whenVerified(data); + }); + } + + /** + * Generate a log file for the FxA action that just completed + * and refresh the input & output streams. + */ + async flushLogFile() { + const logType = await logManager.resetFileLog(); + if (logType == logManager.ERROR_LOG_WRITTEN) { + console.error( + "FxA encountered an error - see about:sync-log for the log file." + ); + } + Services.obs.notifyObservers(null, "service:log-manager:flush-log-file"); + } +} + +var FxAccountsInternal = function () {}; + +/** + * The internal API's prototype. + */ +FxAccountsInternal.prototype = { + // Make a local copy of this constant so we can mock it in testing + POLL_SESSION, + + // The timeout (in ms) we use to poll for a verified mail for the first + // VERIFICATION_POLL_START_SLOWDOWN_THRESHOLD minutes if the user has + // logged-in in this session. + VERIFICATION_POLL_TIMEOUT_INITIAL: 60000, // 1 minute. + // All the other cases (> 5 min, on restart etc). + VERIFICATION_POLL_TIMEOUT_SUBSEQUENT: 5 * 60000, // 5 minutes. + // After X minutes, the polling will slow down to _SUBSEQUENT if we have + // logged-in in this session. + VERIFICATION_POLL_START_SLOWDOWN_THRESHOLD: 5, + + _fxAccountsClient: null, + + // All significant initialization should be done in this initialize() method + // to help with our mocking story. + initialize() { + XPCOMUtils.defineLazyGetter(this, "fxaPushService", function () { + return Cc["@mozilla.org/fxaccounts/push;1"].getService( + Ci.nsISupports + ).wrappedJSObject; + }); + + this.keys = new lazy.FxAccountsKeys(this); + + if (!this.observerPreloads) { + // A registry of promise-returning functions that `notifyObservers` should + // call before sending notifications. Primarily used so parts of Firefox + // which have yet to load for performance reasons can be force-loaded, and + // thus not miss notifications. + this.observerPreloads = [ + // Sync + () => { + let { Weave } = ChromeUtils.importESModule( + "resource://services-sync/main.sys.mjs" + ); + return Weave.Service.promiseInitialized; + }, + ]; + } + + this.currentTimer = null; + // This object holds details about, and storage for, the current user. It + // is replaced when a different user signs in. Instead of using it directly, + // you should try and use `withCurrentAccountState`. + this.currentAccountState = this.newAccountState(); + }, + + async withCurrentAccountState(func) { + const state = this.currentAccountState; + let result; + try { + result = await func(state); + } catch (ex) { + return state.reject(ex); + } + return state.resolve(result); + }, + + async withVerifiedAccountState(func) { + return this.withCurrentAccountState(async state => { + let data = await state.getUserAccountData(); + if (!data) { + // No signed-in user + throw this._error(ERROR_NO_ACCOUNT); + } + + if (!this.isUserEmailVerified(data)) { + // Signed-in user has not verified email + throw this._error(ERROR_UNVERIFIED_ACCOUNT); + } + return func(state); + }); + }, + + async withSessionToken(func, mustBeVerified = true) { + const state = this.currentAccountState; + let data = await state.getUserAccountData(); + if (!data) { + // No signed-in user + throw this._error(ERROR_NO_ACCOUNT); + } + + if (mustBeVerified && !this.isUserEmailVerified(data)) { + // Signed-in user has not verified email + throw this._error(ERROR_UNVERIFIED_ACCOUNT); + } + + if (!data.sessionToken) { + throw this._error(ERROR_AUTH_ERROR, "no session token"); + } + try { + // Anyone who needs the session token is going to send it to the server, + // so there's a chance we'll see an auth related error - so handle that + // here rather than requiring each caller to remember to. + let result = await func(data.sessionToken, state); + return state.resolve(result); + } catch (err) { + return this._handleTokenError(err); + } + }, + + get fxAccountsClient() { + if (!this._fxAccountsClient) { + this._fxAccountsClient = new lazy.FxAccountsClient(); + } + return this._fxAccountsClient; + }, + + // The profile object used to fetch the actual user profile. + _profile: null, + get profile() { + if (!this._profile) { + let profileServerUrl = Services.urlFormatter.formatURLPref( + "identity.fxaccounts.remote.profile.uri" + ); + this._profile = new lazy.FxAccountsProfile({ + fxa: this, + profileServerUrl, + }); + } + return this._profile; + }, + + _commands: null, + get commands() { + if (!this._commands) { + this._commands = new lazy.FxAccountsCommands(this); + } + return this._commands; + }, + + _device: null, + get device() { + if (!this._device) { + this._device = new lazy.FxAccountsDevice(this); + } + return this._device; + }, + + _telemetry: null, + get telemetry() { + if (!this._telemetry) { + this._telemetry = new lazy.FxAccountsTelemetry(this); + } + return this._telemetry; + }, + + // A hook-point for tests who may want a mocked AccountState or mocked storage. + newAccountState(credentials) { + let storage = new FxAccountsStorageManager(); + storage.initialize(credentials); + return new AccountState(storage); + }, + + notifyDevices(deviceIds, excludedIds, payload, TTL) { + if (typeof deviceIds == "string") { + deviceIds = [deviceIds]; + } + return this.withSessionToken(sessionToken => { + return this.fxAccountsClient.notifyDevices( + sessionToken, + deviceIds, + excludedIds, + payload, + TTL + ); + }); + }, + + /** + * Return the current time in milliseconds as an integer. Allows tests to + * manipulate the date to simulate token expiration. + */ + now() { + return this.fxAccountsClient.now(); + }, + + /** + * Return clock offset in milliseconds, as reported by the fxAccountsClient. + * This can be overridden for testing. + * + * The offset is the number of milliseconds that must be added to the client + * clock to make it equal to the server clock. For example, if the client is + * five minutes ahead of the server, the localtimeOffsetMsec will be -300000. + */ + get localtimeOffsetMsec() { + return this.fxAccountsClient.localtimeOffsetMsec; + }, + + /** + * Ask the server whether the user's email has been verified + */ + checkEmailStatus: function checkEmailStatus(sessionToken, options = {}) { + if (!sessionToken) { + return Promise.reject( + new Error("checkEmailStatus called without a session token") + ); + } + return this.fxAccountsClient + .recoveryEmailStatus(sessionToken, options) + .catch(error => this._handleTokenError(error)); + }, + + // set() makes sure that polling is happening, if necessary. + // get() does not wait for verification, and returns an object even if + // unverified. The caller of get() must check .verified . + // The "fxaccounts:onverified" event will fire only when the verified + // state goes from false to true, so callers must register their observer + // and then call get(). In particular, it will not fire when the account + // was found to be verified in a previous boot: if our stored state says + // the account is verified, the event will never fire. So callers must do: + // register notification observer (go) + // userdata = get() + // if (userdata.verified()) {go()} + + /** + * Set the current user signed in to Firefox Accounts. + * + * @param credentials + * The credentials object obtained by logging in or creating + * an account on the FxA server: + * { + * authAt: The time (seconds since epoch) that this record was + * authenticated + * email: The users email address + * keyFetchToken: a keyFetchToken which has not yet been used + * sessionToken: Session for the FxA server + * uid: The user's unique id + * unwrapBKey: used to unwrap kB, derived locally from the + * password (not revealed to the FxA server) + * verified: true/false + * } + * @return Promise + * The promise resolves to null when the data is saved + * successfully and is rejected on error. + */ + async setSignedInUser(credentials) { + if (!lazy.FXA_ENABLED) { + throw new Error("Cannot call setSignedInUser when FxA is disabled."); + } + lazy.Preferences.resetBranch(PREF_ACCOUNT_ROOT); + log.debug("setSignedInUser - aborting any existing flows"); + const signedInUser = await this.currentAccountState.getUserAccountData(); + if (signedInUser) { + await this._signOutServer( + signedInUser.sessionToken, + signedInUser.oauthTokens + ); + } + await this.abortExistingFlow(); + let currentAccountState = (this.currentAccountState = this.newAccountState( + Cu.cloneInto(credentials, {}) // Pass a clone of the credentials object. + )); + // This promise waits for storage, but not for verification. + // We're telling the caller that this is durable now (although is that + // really something we should commit to? Why not let the write happen in + // the background? Already does for updateAccountData ;) + await currentAccountState.promiseInitialized; + // Starting point for polling if new user + if (!this.isUserEmailVerified(credentials)) { + this.startVerifiedCheck(credentials); + } + await this.notifyObservers(ONLOGIN_NOTIFICATION); + await this.updateDeviceRegistration(); + return currentAccountState.resolve(); + }, + + /** + * Update account data for the currently signed in user. + * + * @param credentials + * The credentials object containing the fields to be updated. + * This object must contain the |uid| field and it must + * match the currently signed in user. + */ + updateUserAccountData(credentials) { + log.debug( + "updateUserAccountData called with fields", + Object.keys(credentials) + ); + if (logPII) { + log.debug("updateUserAccountData called with data", credentials); + } + let currentAccountState = this.currentAccountState; + return currentAccountState.promiseInitialized.then(() => { + if (!credentials.uid) { + throw new Error("The specified credentials have no uid"); + } + return currentAccountState.updateUserAccountData(credentials); + }); + }, + + /* + * Reset state such that any previous flow is canceled. + */ + abortExistingFlow() { + if (this.currentTimer) { + log.debug("Polling aborted; Another user signing in"); + clearTimeout(this.currentTimer); + this.currentTimer = 0; + } + if (this._profile) { + this._profile.tearDown(); + this._profile = null; + } + if (this._commands) { + this._commands = null; + } + if (this._device) { + this._device.reset(); + } + // We "abort" the accountState and assume our caller is about to throw it + // away and replace it with a new one. + return this.currentAccountState.abort(); + }, + + async checkVerificationStatus() { + log.trace("checkVerificationStatus"); + let state = this.currentAccountState; + let data = await state.getUserAccountData(); + if (!data) { + log.trace("checkVerificationStatus - no user data"); + return null; + } + + // Always check the verification status, even if the local state indicates + // we're already verified. If the user changed their password, the check + // will fail, and we'll enter the reauth state. + log.trace("checkVerificationStatus - forcing verification status check"); + return this.startPollEmailStatus(state, data.sessionToken, "push"); + }, + + _destroyOAuthToken(tokenData) { + return this.fxAccountsClient.oauthDestroy( + FX_OAUTH_CLIENT_ID, + tokenData.token + ); + }, + + _destroyAllOAuthTokens(tokenInfos) { + if (!tokenInfos) { + return Promise.resolve(); + } + // let's just destroy them all in parallel... + let promises = []; + for (let tokenInfo of Object.values(tokenInfos)) { + promises.push(this._destroyOAuthToken(tokenInfo)); + } + return Promise.all(promises); + }, + + async signOut(localOnly) { + let sessionToken; + let tokensToRevoke; + const data = await this.currentAccountState.getUserAccountData(); + // Save the sessionToken, tokens before resetting them in _signOutLocal(). + if (data) { + sessionToken = data.sessionToken; + tokensToRevoke = data.oauthTokens; + } + await this.notifyObservers(ON_PRELOGOUT_NOTIFICATION); + await this._signOutLocal(); + if (!localOnly) { + // Do this in the background so *any* slow request won't + // block the local sign out. + Services.tm.dispatchToMainThread(async () => { + await this._signOutServer(sessionToken, tokensToRevoke); + lazy.FxAccountsConfig.resetConfigURLs(); + this.notifyObservers("testhelper-fxa-signout-complete"); + }); + } else { + // We want to do this either way -- but if we're signing out remotely we + // need to wait until we destroy the oauth tokens if we want that to succeed. + lazy.FxAccountsConfig.resetConfigURLs(); + } + return this.notifyObservers(ONLOGOUT_NOTIFICATION); + }, + + async _signOutLocal() { + lazy.Preferences.resetBranch(PREF_ACCOUNT_ROOT); + await this.currentAccountState.signOut(); + // this "aborts" this.currentAccountState but doesn't make a new one. + await this.abortExistingFlow(); + this.currentAccountState = this.newAccountState(); + return this.currentAccountState.promiseInitialized; + }, + + async _signOutServer(sessionToken, tokensToRevoke) { + log.debug("Unsubscribing from FxA push."); + try { + await this.fxaPushService.unsubscribe(); + } catch (err) { + log.error("Could not unsubscribe from push.", err); + } + if (sessionToken) { + log.debug("Destroying session and device."); + try { + await this.fxAccountsClient.signOut(sessionToken, { service: "sync" }); + } catch (err) { + log.error("Error during remote sign out of Firefox Accounts", err); + } + } else { + log.warn("Missing session token; skipping remote sign out"); + } + log.debug("Destroying all OAuth tokens."); + try { + await this._destroyAllOAuthTokens(tokensToRevoke); + } catch (err) { + log.error("Error during destruction of oauth tokens during signout", err); + } + }, + + getUserAccountData(fieldNames = null) { + return this.currentAccountState.getUserAccountData(fieldNames); + }, + + isUserEmailVerified: function isUserEmailVerified(data) { + return !!(data && data.verified); + }, + + /** + * Setup for and if necessary do email verification polling. + */ + loadAndPoll() { + let currentState = this.currentAccountState; + return currentState.getUserAccountData().then(data => { + if (data) { + if (!this.isUserEmailVerified(data)) { + this.startPollEmailStatus( + currentState, + data.sessionToken, + "browser-startup" + ); + } + } + return data; + }); + }, + + startVerifiedCheck(data) { + log.debug("startVerifiedCheck", data && data.verified); + if (logPII) { + log.debug("startVerifiedCheck with user data", data); + } + + // Get us to the verified state. This returns a promise that will fire when + // verification is complete. + + // The callers of startVerifiedCheck never consume a returned promise (ie, + // this is simply kicking off a background fetch) so we must add a rejection + // handler to avoid runtime warnings about the rejection not being handled. + this.whenVerified(data).catch(err => + log.info("startVerifiedCheck promise was rejected: " + err) + ); + }, + + whenVerified(data) { + let currentState = this.currentAccountState; + if (data.verified) { + log.debug("already verified"); + return currentState.resolve(data); + } + if (!currentState.whenVerifiedDeferred) { + log.debug("whenVerified promise starts polling for verified email"); + this.startPollEmailStatus(currentState, data.sessionToken, "start"); + } + return currentState.whenVerifiedDeferred.promise.then(result => + currentState.resolve(result) + ); + }, + + async notifyObservers(topic, data) { + for (let f of this.observerPreloads) { + try { + await f(); + } catch (O_o) {} + } + log.debug("Notifying observers of " + topic); + Services.obs.notifyObservers(null, topic, data); + }, + + startPollEmailStatus(currentState, sessionToken, why) { + log.debug("entering startPollEmailStatus: " + why); + // If we were already polling, stop and start again. This could happen + // if the user requested the verification email to be resent while we + // were already polling for receipt of an earlier email. + if (this.currentTimer) { + log.debug( + "startPollEmailStatus starting while existing timer is running" + ); + clearTimeout(this.currentTimer); + this.currentTimer = null; + } + + this.pollStartDate = Date.now(); + if (!currentState.whenVerifiedDeferred) { + currentState.whenVerifiedDeferred = PromiseUtils.defer(); + // This deferred might not end up with any handlers (eg, if sync + // is yet to start up.) This might cause "A promise chain failed to + // handle a rejection" messages, so add an error handler directly + // on the promise to log the error. + currentState.whenVerifiedDeferred.promise.then( + () => { + log.info("the user became verified"); + // We are now ready for business. This should only be invoked once + // per setSignedInUser(), regardless of whether we've rebooted since + // setSignedInUser() was called. + this.notifyObservers(ONVERIFIED_NOTIFICATION); + }, + err => { + log.info("the wait for user verification was stopped: " + err); + } + ); + } + return this.pollEmailStatus(currentState, sessionToken, why); + }, + + // We return a promise for testing only. Other callers can ignore this, + // since verification polling continues in the background. + async pollEmailStatus(currentState, sessionToken, why) { + log.debug("entering pollEmailStatus: " + why); + let nextPollMs; + try { + const response = await this.checkEmailStatus(sessionToken, { + reason: why, + }); + log.debug("checkEmailStatus -> " + JSON.stringify(response)); + if (response && response.verified) { + await this.onPollEmailSuccess(currentState); + return; + } + } catch (error) { + if (error && error.code && error.code == 401) { + let error = new Error("Verification status check failed"); + this._rejectWhenVerified(currentState, error); + return; + } + if (error && error.retryAfter) { + // If the server told us to back off, back off the requested amount. + nextPollMs = (error.retryAfter + 3) * 1000; + log.warn( + `the server rejected our email status check and told us to try again in ${nextPollMs}ms` + ); + } else { + log.error(`checkEmailStatus failed to poll`, error); + } + } + if (why == "push") { + return; + } + let pollDuration = Date.now() - this.pollStartDate; + // Polling session expired. + if (pollDuration >= this.POLL_SESSION) { + if (currentState.whenVerifiedDeferred) { + let error = new Error("User email verification timed out."); + this._rejectWhenVerified(currentState, error); + } + log.debug("polling session exceeded, giving up"); + return; + } + // Poll email status again after a short delay. + if (nextPollMs === undefined) { + let currentMinute = Math.ceil(pollDuration / 60000); + nextPollMs = + why == "start" && + currentMinute < this.VERIFICATION_POLL_START_SLOWDOWN_THRESHOLD + ? this.VERIFICATION_POLL_TIMEOUT_INITIAL + : this.VERIFICATION_POLL_TIMEOUT_SUBSEQUENT; + } + this._scheduleNextPollEmailStatus( + currentState, + sessionToken, + nextPollMs, + why + ); + }, + + // Easy-to-mock testable method + _scheduleNextPollEmailStatus(currentState, sessionToken, nextPollMs, why) { + log.debug("polling with timeout = " + nextPollMs); + this.currentTimer = setTimeout(() => { + this.pollEmailStatus(currentState, sessionToken, why); + }, nextPollMs); + }, + + async onPollEmailSuccess(currentState) { + try { + await currentState.updateUserAccountData({ verified: true }); + const accountData = await currentState.getUserAccountData(); + this._setLastUserPref(accountData.email); + // Now that the user is verified, we can proceed to fetch keys + if (currentState.whenVerifiedDeferred) { + currentState.whenVerifiedDeferred.resolve(accountData); + delete currentState.whenVerifiedDeferred; + } + } catch (e) { + log.error(e); + } + }, + + _rejectWhenVerified(currentState, error) { + currentState.whenVerifiedDeferred.reject(error); + delete currentState.whenVerifiedDeferred; + }, + + /** + * Does the actual fetch of an oauth token for getOAuthToken() + * using the account session token. + * + * It's split out into a separate method so that we can easily + * stash in-flight calls in a cache. + * + * @param {String} scopeString + * @param {Number} ttl + * @returns {Promise<string>} + * @private + */ + async _doTokenFetchWithSessionToken(sessionToken, scopeString, ttl) { + const result = await this.fxAccountsClient.accessTokenWithSessionToken( + sessionToken, + FX_OAUTH_CLIENT_ID, + scopeString, + ttl + ); + return result.access_token; + }, + + getOAuthToken(options = {}) { + log.debug("getOAuthToken enter"); + let scope = options.scope; + if (typeof scope === "string") { + scope = [scope]; + } + + if (!scope || !scope.length) { + return Promise.reject( + this._error( + ERROR_INVALID_PARAMETER, + "Missing or invalid 'scope' option" + ) + ); + } + + return this.withSessionToken(async (sessionToken, currentState) => { + // Early exit for a cached token. + let cached = currentState.getCachedToken(scope); + if (cached) { + log.debug("getOAuthToken returning a cached token"); + return cached.token; + } + + // Build the string we use in our "inflight" map and that we send to the + // server. Because it's used as a key in the map we sort the scopes. + let scopeString = scope.sort().join(" "); + + // We keep a map of in-flight requests to avoid multiple promise-based + // consumers concurrently requesting the same token. + let maybeInFlight = currentState.inFlightTokenRequests.get(scopeString); + if (maybeInFlight) { + log.debug("getOAuthToken has an in-flight request for this scope"); + return maybeInFlight; + } + + // We need to start a new fetch and stick the promise in our in-flight map + // and remove it when it resolves. + let promise = this._doTokenFetchWithSessionToken( + sessionToken, + scopeString, + options.ttl + ) + .then(token => { + // As a sanity check, ensure something else hasn't raced getting a token + // of the same scope. If something has we just make noise rather than + // taking any concrete action because it should never actually happen. + if (currentState.getCachedToken(scope)) { + log.error(`detected a race for oauth token with scope ${scope}`); + } + // If we got one, cache it. + if (token) { + let entry = { token }; + currentState.setCachedToken(scope, entry); + } + return token; + }) + .finally(() => { + // Remove ourself from the in-flight map. There's no need to check the + // result of .delete() to handle a signout race, because setCachedToken + // above will fail in that case and cause the entire call to fail. + currentState.inFlightTokenRequests.delete(scopeString); + }); + + currentState.inFlightTokenRequests.set(scopeString, promise); + return promise; + }); + }, + + /** + * Remove an OAuth token from the token cache + * and makes a network request to FxA server to destroy the token. + * + * @param options + * { + * token: (string) A previously fetched token. + * } + * @return Promise.<undefined> This function will always resolve, even if + * an unknown token is passed. + */ + removeCachedOAuthToken(options) { + if (!options.token || typeof options.token !== "string") { + throw this._error( + ERROR_INVALID_PARAMETER, + "Missing or invalid 'token' option" + ); + } + return this.withCurrentAccountState(currentState => { + let existing = currentState.removeCachedToken(options.token); + if (existing) { + // background destroy. + this._destroyOAuthToken(existing).catch(err => { + log.warn("FxA failed to revoke a cached token", err); + }); + } + }); + }, + + async _getVerifiedAccountOrReject() { + let data = await this.currentAccountState.getUserAccountData(); + if (!data) { + // No signed-in user + throw this._error(ERROR_NO_ACCOUNT); + } + if (!this.isUserEmailVerified(data)) { + // Signed-in user has not verified email + throw this._error(ERROR_UNVERIFIED_ACCOUNT); + } + return data; + }, + + // _handle* methods used by push, used when the account/device status is + // changed on a different device. + async _handleAccountDestroyed(uid) { + let state = this.currentAccountState; + const accountData = await state.getUserAccountData(); + const localUid = accountData ? accountData.uid : null; + if (!localUid) { + log.info( + `Account destroyed push notification received, but we're already logged-out` + ); + return null; + } + if (uid == localUid) { + const data = JSON.stringify({ isLocalDevice: true }); + await this.notifyObservers(ON_DEVICE_DISCONNECTED_NOTIFICATION, data); + return this.signOut(true); + } + log.info( + `The destroyed account uid doesn't match with the local uid. ` + + `Local: ${localUid}, account uid destroyed: ${uid}` + ); + return null; + }, + + async _handleDeviceDisconnection(deviceId) { + let state = this.currentAccountState; + const accountData = await state.getUserAccountData(); + if (!accountData || !accountData.device) { + // Nothing we can do here. + return; + } + const localDeviceId = accountData.device.id; + const isLocalDevice = deviceId == localDeviceId; + if (isLocalDevice) { + this.signOut(true); + } + const data = JSON.stringify({ isLocalDevice }); + await this.notifyObservers(ON_DEVICE_DISCONNECTED_NOTIFICATION, data); + }, + + _setLastUserPref(newEmail) { + Services.prefs.setStringPref( + PREF_LAST_FXA_USER, + CryptoUtils.sha256Base64(newEmail) + ); + }, + + async _handleEmailUpdated(newEmail) { + this._setLastUserPref(newEmail); + await this.currentAccountState.updateUserAccountData({ email: newEmail }); + }, + + /* + * Coerce an error into one of the general error cases: + * NETWORK_ERROR + * AUTH_ERROR + * UNKNOWN_ERROR + * + * These errors will pass through: + * INVALID_PARAMETER + * NO_ACCOUNT + * UNVERIFIED_ACCOUNT + */ + _errorToErrorClass(aError) { + if (aError.errno) { + let error = SERVER_ERRNO_TO_ERROR[aError.errno]; + return this._error( + ERROR_TO_GENERAL_ERROR_CLASS[error] || ERROR_UNKNOWN, + aError + ); + } else if ( + aError.message && + (aError.message === "INVALID_PARAMETER" || + aError.message === "NO_ACCOUNT" || + aError.message === "UNVERIFIED_ACCOUNT" || + aError.message === "AUTH_ERROR") + ) { + return aError; + } + return this._error(ERROR_UNKNOWN, aError); + }, + + _error(aError, aDetails) { + log.error("FxA rejecting with error ${aError}, details: ${aDetails}", { + aError, + aDetails, + }); + let reason = new Error(aError); + if (aDetails) { + reason.details = aDetails; + } + return reason; + }, + + // Attempt to update the auth server with whatever device details are stored + // in the account data. Returns a promise that always resolves, never rejects. + // If the promise resolves to a value, that value is the device id. + updateDeviceRegistration() { + return this.device.updateDeviceRegistration(); + }, + + /** + * Delete all the persisted credentials we store for FxA. After calling + * this, the user will be forced to re-authenticate to continue. + * + * @return Promise resolves when the user data has been persisted + */ + dropCredentials(state) { + // Delete all fields except those required for the user to + // reauthenticate. + let updateData = {}; + let clearField = field => { + if (!FXA_PWDMGR_REAUTH_ALLOWLIST.has(field)) { + updateData[field] = null; + } + }; + FXA_PWDMGR_PLAINTEXT_FIELDS.forEach(clearField); + FXA_PWDMGR_SECURE_FIELDS.forEach(clearField); + + return state.updateUserAccountData(updateData); + }, + + async checkAccountStatus(state) { + log.info("checking account status..."); + let data = await state.getUserAccountData(["uid", "sessionToken"]); + if (!data) { + log.info("account status: no user"); + return false; + } + // If we have a session token, then check if that remains valid - if this + // works we know the account must also be OK. + if (data.sessionToken) { + if (await this.fxAccountsClient.sessionStatus(data.sessionToken)) { + log.info("account status: ok"); + return true; + } + } + let exists = await this.fxAccountsClient.accountStatus(data.uid); + if (!exists) { + // Delete all local account data. Since the account no longer + // exists, we can skip the remote calls. + log.info("account status: deleted"); + await this._handleAccountDestroyed(data.uid); + } else { + // Note that we may already have been in a "needs reauth" state (ie, if + // this function was called when we already had no session token), but + // that's OK - re-notifying etc should cause no harm. + log.info("account status: needs reauthentication"); + await this.dropCredentials(this.currentAccountState); + // Notify the account state has changed so the UI updates. + await this.notifyObservers(ON_ACCOUNT_STATE_CHANGE_NOTIFICATION); + } + return false; + }, + + async _handleTokenError(err) { + if (!err || err.code != 401 || err.errno != ERRNO_INVALID_AUTH_TOKEN) { + throw err; + } + log.warn("handling invalid token error", err); + // Note that we don't use `withCurrentAccountState` here as that will cause + // an error to be thrown if we sign out due to the account not existing. + let state = this.currentAccountState; + let ok = await this.checkAccountStatus(state); + if (ok) { + log.warn("invalid token error, but account state appears ok?"); + } + // always re-throw the error. + throw err; + }, +}; + +let fxAccountsSingleton = null; + +export function getFxAccountsSingleton() { + if (fxAccountsSingleton) { + return fxAccountsSingleton; + } + + fxAccountsSingleton = new FxAccounts(); + + // XXX Bug 947061 - We need a strategy for resuming email verification after + // browser restart + fxAccountsSingleton._internal.loadAndPoll(); + + return fxAccountsSingleton; +} + +// `AccountState` is exported for tests. |