/* 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/. */ this.EXPORTED_SYMBOLS = ["fxAccounts", "FxAccounts"]; const {classes: Cc, interfaces: Ci, utils: Cu} = Components; Cu.import("resource://gre/modules/Log.jsm"); Cu.import("resource://gre/modules/Promise.jsm"); Cu.import("resource://gre/modules/osfile.jsm"); Cu.import("resource://services-common/utils.js"); Cu.import("resource://services-crypto/utils.js"); Cu.import("resource://gre/modules/Services.jsm"); Cu.import("resource://gre/modules/XPCOMUtils.jsm"); Cu.import("resource://gre/modules/Timer.jsm"); Cu.import("resource://gre/modules/Task.jsm"); Cu.import("resource://gre/modules/FxAccountsCommon.js"); XPCOMUtils.defineLazyModuleGetter(this, "FxAccountsClient", "resource://gre/modules/FxAccountsClient.jsm"); XPCOMUtils.defineLazyModuleGetter(this, "jwcrypto", "resource://gre/modules/identity/jwcrypto.jsm"); XPCOMUtils.defineLazyModuleGetter(this, "FxAccountsOAuthGrantClient", "resource://gre/modules/FxAccountsOAuthGrantClient.jsm"); XPCOMUtils.defineLazyModuleGetter(this, "FxAccountsProfile", "resource://gre/modules/FxAccountsProfile.jsm"); // All properties exposed by the public FxAccounts API. let publicProperties = [ "accountStatus", "getAccountsClient", "getAccountsSignInURI", "getAccountsSignUpURI", "getAssertion", "getKeys", "getSignedInUser", "getOAuthToken", "getSignedInUserProfile", "loadAndPoll", "localtimeOffsetMsec", "now", "promiseAccountsForceSigninURI", "promiseAccountsChangeProfileURI", "promiseAccountsManageURI", "removeCachedOAuthToken", "resendVerificationEmail", "setSignedInUser", "signOut", "version", "whenVerified" ]; // An AccountState object holds all state related to one specific account. // 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. let AccountState = function(fxaInternal, signedInUserStorage, accountData = null) { this.fxaInternal = fxaInternal; this.signedInUserStorage = signedInUserStorage; this.signedInUser = accountData ? {version: DATA_FORMAT_VERSION, accountData} : null; this.uid = accountData ? accountData.uid : null; this.oauthTokens = {}; }; AccountState.prototype = { cert: null, keyPair: null, signedInUser: null, oauthTokens: null, whenVerifiedDeferred: null, whenKeysReadyDeferred: null, profile: null, promiseInitialAccountData: null, uid: null, get isCurrent() this.fxaInternal && this.fxaInternal.currentAccountState === this, abort: function() { 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("Verification aborted; Another user signing in")); this.whenKeysReadyDeferred = null; } this.cert = null; this.keyPair = null; this.signedInUser = null; this.uid = null; this.fxaInternal = null; this.initProfilePromise = null; if (this.profile) { this.profile.tearDown(); this.profile = null; } }, // Clobber all cached data and write that empty data to storage. signOut() { this.cert = null; this.keyPair = null; this.signedInUser = null; this.oauthTokens = {}; this.uid = null; return this.persistUserData(); }, getUserAccountData() { if (!this.isCurrent) { return this.reject(new Error("Another user has signed in")); } if (this.promiseInitialAccountData) { // We are still reading the data for the first and only time. return this.promiseInitialAccountData; } // We've previously read it successfully (and possibly updated it since) if (this.signedInUser) { return this.resolve(this.signedInUser.accountData); } // We fetch the signedInUser data first, then fetch the token store and // ensure the uid in the tokens matches our user. let accountData = null; let oauthTokens = {}; return this.promiseInitialAccountData = this.signedInUserStorage.get() .then(user => { if (logPII) { log.debug("getUserAccountData", user); } // In an ideal world we could cache the data in this.signedInUser, but // if we do, the interaction with the login manager breaks when the // password is locked as this read may only have obtained partial data. // Therefore every read *must* really read incase the login manager is // now unlocked. We could fix this with a refactor... accountData = user ? user.accountData : null; }, err => { // Error reading signed in user account data. this.promiseInitialAccountData = null; if (err instanceof OS.File.Error && err.becauseNoSuchFile) { // File hasn't been created yet. That will be done // on the first call to setSignedInUser return; } // something else went wrong - report the error but continue without // user data. log.error("Failed to read signed in user data", err); }).then(() => { if (!accountData) { return null; } return this.signedInUserStorage.getOAuthTokens(); }).then(tokenData => { if (tokenData && tokenData.tokens && tokenData.version == DATA_FORMAT_VERSION && tokenData.uid == accountData.uid ) { oauthTokens = tokenData.tokens; } }, err => { // Error reading the OAuth tokens file. if (err instanceof OS.File.Error && err.becauseNoSuchFile) { // File hasn't been created yet, but will be when tokens are saved. return; } log.error("Failed to read oauth tokens", err) }).then(() => { // We are done - clear our promise and save the data if we are still // current. this.promiseInitialAccountData = null; if (this.isCurrent) { // As above, we can not cache the data to this.signedInUser as we // may only have partial data due to a locked MP, so the next // request must re-read incase it is now unlocked. // But we do save the tokens and the uid this.oauthTokens = oauthTokens; this.uid = accountData ? accountData.uid : null; } return accountData; }); // phew! }, // XXX - this should really be called "updateCurrentUserData" or similar as // it is only ever used to add new fields to the *current* user, not to // set a new user as current. setUserAccountData: function(accountData) { if (!this.isCurrent) { return this.reject(new Error("Another user has signed in")); } if (this.promiseInitialAccountData) { throw new Error("Can't set account data before it's been read."); } if (!accountData) { // see above - this should really be called "updateCurrentUserData" or similar. throw new Error("Attempt to use setUserAccountData with null user data."); } if (accountData.uid != this.uid) { // see above - this should really be called "updateCurrentUserData" or similar. throw new Error("Attempt to use setUserAccountData with a different user."); } // Set our signedInUser before we start the write, so any updates to the // data while the write completes are still captured. this.signedInUser = {version: DATA_FORMAT_VERSION, accountData: accountData}; return this.signedInUserStorage.set(this.signedInUser) .then(() => this.resolve(accountData)); }, getCertificate: function(data, keyPair, mustBeValidUntil) { if (logPII) { // don't stringify unless it will be written. We should replace this // check with param substitutions added in bug 966674 log.debug("getCertificate" + JSON.stringify(this.signedInUser)); } // TODO: get the lifetime from the cert's .exp field if (this.cert && this.cert.validUntil > mustBeValidUntil) { log.debug(" getCertificate already had one"); return this.resolve(this.cert.cert); } if (Services.io.offline) { return this.reject(new Error(ERROR_OFFLINE)); } let willBeValidUntil = this.fxaInternal.now() + CERT_LIFETIME; return this.fxaInternal.getCertificateSigned(data.sessionToken, keyPair.serializedPublicKey, CERT_LIFETIME).then( cert => { log.debug("getCertificate got a new one: " + !!cert); this.cert = { cert: cert, validUntil: willBeValidUntil }; return cert; } ).then(result => this.resolve(result)); }, getKeyPair: function(mustBeValidUntil) { // If the debugging pref to ignore cached authentication credentials is set for Sync, // then don't use any cached key pair, i.e., generate a new one and get it signed. // The purpose of this pref is to expedite any auth errors as the result of a // expired or revoked FxA session token, e.g., from resetting or changing the FxA // password. let ignoreCachedAuthCredentials = false; try { ignoreCachedAuthCredentials = Services.prefs.getBoolPref("services.sync.debug.ignoreCachedAuthCredentials"); } catch(e) { // Pref doesn't exist } if (!ignoreCachedAuthCredentials && this.keyPair && (this.keyPair.validUntil > mustBeValidUntil)) { log.debug("getKeyPair: already have a keyPair"); return this.resolve(this.keyPair.keyPair); } // Otherwse, create a keypair and set validity limit. let willBeValidUntil = this.fxaInternal.now() + KEY_LIFETIME; let d = Promise.defer(); jwcrypto.generateKeyPair("DS160", (err, kp) => { if (err) { return this.reject(err); } this.keyPair = { keyPair: kp, validUntil: willBeValidUntil }; log.debug("got keyPair"); delete this.cert; d.resolve(this.keyPair.keyPair); }); return d.promise.then(result => this.resolve(result)); }, // Get the account's profile image URL from the profile server getProfile: function () { return this.initProfile() .then(() => this.profile.getProfile()); }, // Instantiate a FxAccountsProfile with a fresh OAuth token if needed initProfile: function () { let profileServerUrl = Services.urlFormatter.formatURLPref("identity.fxaccounts.remote.profile.uri"); let oAuthOptions = { scope: "profile" }; if (this.initProfilePromise) { return this.initProfilePromise; } this.initProfilePromise = this.fxaInternal.getOAuthToken(oAuthOptions) .then(token => { this.profile = new FxAccountsProfile(this, { profileServerUrl: profileServerUrl, token: token }); this.initProfilePromise = null; }) .then(null, err => { this.initProfilePromise = null; throw err; }); return this.initProfilePromise; }, resolve: function(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: function(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. // 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 (eg, it probably specifies the server to revoke // from). 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); if (this.oauthTokens[key]) { // 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 this.oauthTokens[key]; } return null; }, // Get an array of tokenData for all cached tokens. getAllCachedTokens() { this._cachePreamble(); let result = []; for (let [key, tokenValue] in Iterator(this.oauthTokens)) { result.push(tokenValue); } return result; }, // 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] in Iterator(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(); let record; if (this.uid) { record = { version: DATA_FORMAT_VERSION, uid: this.uid, tokens: this.oauthTokens, }; } else { record = null; } return this.signedInUserStorage.setOAuthTokens(record).catch( err => { log.error("Failed to save account data for token cache", err); } ); }, persistUserData() { return this._persistCachedTokens().catch(err => { log.error("Failed to persist cached tokens", err); }).then(() => { return this.signedInUserStorage.set(this.signedInUser); }).catch(err => { log.error("Failed to persist account data", 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("|"); } /** * 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 options (object) (optional) * {keys: [...]} * Lets the caller pass the names of all properties they want to be * copied. Will copy all properties of the given source object by * default. * {bind: object} * Lets the caller specify the object that will be used to .bind() * all function properties we find to. Will bind to the given target * object by default. */ function copyObjectProperties(from, to, opts = {}) { let keys = (opts && opts.keys) || Object.keys(from); let thisArg = (opts && opts.bind) || to; for (let prop of keys) { let desc = Object.getOwnPropertyDescriptor(from, prop); if (typeof(desc.value) == "function") { desc.value = desc.value.bind(thisArg); } if (desc.get) { desc.get = desc.get.bind(thisArg); } if (desc.set) { desc.set = desc.set.bind(thisArg); } Object.defineProperty(to, prop, desc); } } /** * The public API's constructor. */ this.FxAccounts = function (mockInternal) { let internal = new FxAccountsInternal(); let external = {}; // Copy all public properties to the 'external' object. let prototype = FxAccountsInternal.prototype; let options = {keys: publicProperties, bind: internal}; copyObjectProperties(prototype, external, options); // Copy all of the mock's properties to the internal object. if (mockInternal && !mockInternal.onlySetInternal) { copyObjectProperties(mockInternal, internal); } if (mockInternal) { // A little work-around to ensure the initial currentAccountState has // the same mock storage the test passed in. if (mockInternal.signedInUserStorage) { internal.currentAccountState.signedInUserStorage = mockInternal.signedInUserStorage; } // Exposes the internal object for testing only. external.internal = internal; } return Object.freeze(external); } /** * The internal API's constructor. */ function FxAccountsInternal() { this.version = DATA_FORMAT_VERSION; // Make a local copy of this constant so we can mock it in testing this.POLL_SESSION = POLL_SESSION; // The one and only "storage" object. While this is created here, the // FxAccountsInternal object does *not* use it directly, but instead passes // it to AccountState objects which has sole responsibility for storage. // Ideally we would create it in the AccountState objects, but that makes // testing hard as AccountState objects are regularly created and thrown // away. Doing it this way means tests can mock/replace this storage object // and have it used by all AccountState objects, even those created before // and after the mock has been setup. // We only want the fancy LoginManagerStorage on desktop. #if defined(MOZ_B2G) this.signedInUserStorage = new JSONStorage({ #else this.signedInUserStorage = new LoginManagerStorage({ #endif // We don't reference |profileDir| in the top-level module scope // as we may be imported before we know where it is. filename: DEFAULT_STORAGE_FILENAME, oauthTokensFilename: DEFAULT_OAUTH_TOKENS_FILENAME, baseDir: OS.Constants.Path.profileDir, }); // We interact with the Firefox Accounts auth server in order to confirm that // a user's email has been verified and also to fetch the user's keys from // the server. We manage these processes in possibly long-lived promises // that are internal to this object (never exposed to callers). Because // Firefox Accounts allows for only one logged-in user, and because it's // conceivable that while we are waiting to verify one identity, a caller // could start verification on a second, different identity, we need to be // able to abort all work on the first sign-in process. The currentTimer and // currentAccountState are used for this purpose. // (XXX - should the timer be directly on the currentAccountState?) this.currentTimer = null; this.currentAccountState = new AccountState(this, this.signedInUserStorage); } /** * The internal API's prototype. */ FxAccountsInternal.prototype = { /** * The current data format's version number. */ version: DATA_FORMAT_VERSION, // The timeout (in ms) we use to poll for a verified mail for the first 2 mins. VERIFICATION_POLL_TIMEOUT_INITIAL: 5000, // 5 seconds // And how often we poll after the first 2 mins. VERIFICATION_POLL_TIMEOUT_SUBSEQUENT: 15000, // 15 seconds. _fxAccountsClient: null, get fxAccountsClient() { if (!this._fxAccountsClient) { this._fxAccountsClient = new FxAccountsClient(); } return this._fxAccountsClient; }, /** * Return the current time in milliseconds as an integer. Allows tests to * manipulate the date to simulate certificate expiration. */ now: function() { return this.fxAccountsClient.now(); }, getAccountsClient: function() { return this.fxAccountsClient; }, /** * 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) { return this.fxAccountsClient.recoveryEmailStatus(sessionToken); }, /** * Once the user's email is verified, we can request the keys */ fetchKeys: function fetchKeys(keyFetchToken) { log.debug("fetchKeys: " + !!keyFetchToken); if (logPII) { log.debug("fetchKeys - the token is " + keyFetchToken); } return this.fxAccountsClient.accountKeys(keyFetchToken); }, // 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()} /** * Get the user currently signed in to Firefox Accounts. * * @return Promise * The promise resolves to the credentials object of the signed-in user: * { * email: The user's email address * uid: The user's unique id * sessionToken: Session for the FxA server * kA: An encryption key from the FxA server * kB: An encryption key derived from the user's FxA password * verified: email verification status * authAt: The time (seconds since epoch) that this record was * authenticated * } * or null if no user is signed in. */ getSignedInUser: function getSignedInUser() { let currentState = this.currentAccountState; return currentState.getUserAccountData().then(data => { if (!data) { return null; } if (!this.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.startVerifiedCheck(data); } return data; }).then(result => currentState.resolve(result)); }, /** * 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. */ setSignedInUser: function setSignedInUser(credentials) { log.debug("setSignedInUser - aborting any existing flows"); this.abortExistingFlow(); let currentAccountState = this.currentAccountState = new AccountState( this, this.signedInUserStorage, JSON.parse(JSON.stringify(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. return currentAccountState.persistUserData().then(() => { this.notifyObservers(ONLOGIN_NOTIFICATION); if (!this.isUserEmailVerified(credentials)) { this.startVerifiedCheck(credentials); } }).then(() => { return currentAccountState.resolve(); }); }, /** * returns a promise that fires with the assertion. If there is no verified * signed-in user, fires with null. */ getAssertion: function getAssertion(audience) { log.debug("enter getAssertion()"); let currentState = this.currentAccountState; let mustBeValidUntil = this.now() + ASSERTION_USE_PERIOD; return currentState.getUserAccountData().then(data => { if (!data) { // No signed-in user return null; } if (!this.isUserEmailVerified(data)) { // Signed-in user has not verified email return null; } return currentState.getKeyPair(mustBeValidUntil).then(keyPair => { return currentState.getCertificate(data, keyPair, mustBeValidUntil) .then(cert => { return this.getAssertionFromCert(data, keyPair, cert, audience); }); }); }).then(result => currentState.resolve(result)); }, /** * Resend the verification email fot the currently signed-in user. * */ resendVerificationEmail: function resendVerificationEmail() { let currentState = this.currentAccountState; return this.getSignedInUser().then(data => { // If the caller is asking for verification to be re-sent, and there is // no signed-in user to begin with, this is probably best regarded as an // error. if (data) { this.pollEmailStatus(currentState, data.sessionToken, "start"); return this.fxAccountsClient.resendVerificationEmail(data.sessionToken); } throw new Error("Cannot resend verification email; no signed-in user"); }); }, /* * Reset state such that any previous flow is canceled. */ abortExistingFlow: function abortExistingFlow() { if (this.currentTimer) { log.debug("Polling aborted; Another user signing in"); clearTimeout(this.currentTimer); this.currentTimer = 0; } this.currentAccountState.abort(); this.currentAccountState = new AccountState(this, this.signedInUserStorage); }, accountStatus: function accountStatus() { return this.currentAccountState.getUserAccountData().then(data => { if (!data) { return false; } return this.fxAccountsClient.accountStatus(data.uid); }); }, _destroyOAuthToken: function(tokenData) { let client = new FxAccountsOAuthGrantClient({ serverURL: tokenData.server, client_id: FX_OAUTH_CLIENT_ID }); return client.destroyToken(tokenData.token) }, _destroyAllOAuthTokens: function(tokenInfos) { // let's just destroy them all in parallel... let promises = []; for (let tokenInfo of tokenInfos) { promises.push(this._destroyOAuthToken(tokenInfo)); } return Promise.all(promises); }, signOut: function signOut(localOnly) { let currentState = this.currentAccountState; let sessionToken; let tokensToRevoke; return currentState.getUserAccountData().then(data => { // Save the session token for use in the call to signOut below. sessionToken = data && data.sessionToken; tokensToRevoke = currentState.getAllCachedTokens(); return this._signOutLocal(); }).then(() => { // FxAccountsManager calls here, then does its own call // to FxAccountsClient.signOut(). if (!localOnly) { // Wrap this in a promise so *any* errors in signOut won't // block the local sign out. This is *not* returned. Promise.resolve().then(() => { // This can happen in the background and shouldn't block // the user from signing out. The server must tolerate // clients just disappearing, so this call should be best effort. return this._signOutServer(sessionToken); }).catch(err => { log.error("Error during remote sign out of Firefox Accounts", err); }).then(() => { return this._destroyAllOAuthTokens(tokensToRevoke); }).catch(err => { log.error("Error during destruction of oauth tokens during signout", err); }).then(() => { // just for testing - notifications are cheap when no observers. this.notifyObservers("testhelper-fxa-signout-complete"); }); } }).then(() => { this.notifyObservers(ONLOGOUT_NOTIFICATION); }); }, /** * This function should be called in conjunction with a server-side * signOut via FxAccountsClient. */ _signOutLocal: function signOutLocal() { let currentAccountState = this.currentAccountState; return currentAccountState.signOut().then(() => { this.abortExistingFlow(); // this resets this.currentAccountState. }); }, _signOutServer: function signOutServer(sessionToken) { return this.fxAccountsClient.signOut(sessionToken); }, /** * Fetch encryption keys for the signed-in-user from the FxA API server. * * Not for user consumption. Exists to cause the keys to be fetch. * * Returns user data so that it can be chained with other methods. * * @return Promise * The promise resolves to the credentials object of the signed-in user: * { * email: The user's email address * uid: The user's unique id * sessionToken: Session for the FxA server * kA: An encryption key from the FxA server * kB: An encryption key derived from the user's FxA password * verified: email verification status * } * or null if no user is signed in */ getKeys: function() { let currentState = this.currentAccountState; return currentState.getUserAccountData().then((userData) => { if (!userData) { throw new Error("Can't get keys; User is not signed in"); } if (userData.kA && userData.kB) { return userData; } if (!currentState.whenKeysReadyDeferred) { currentState.whenKeysReadyDeferred = Promise.defer(); if (userData.keyFetchToken) { this.fetchAndUnwrapKeys(userData.keyFetchToken).then( (dataWithKeys) => { if (!dataWithKeys.kA || !dataWithKeys.kB) { currentState.whenKeysReadyDeferred.reject( new Error("user data missing kA or kB") ); return; } currentState.whenKeysReadyDeferred.resolve(dataWithKeys); }, (err) => { currentState.whenKeysReadyDeferred.reject(err); } ); } else { currentState.whenKeysReadyDeferred.reject('No keyFetchToken'); } } return currentState.whenKeysReadyDeferred.promise; }).then(result => currentState.resolve(result)); }, fetchAndUnwrapKeys: function(keyFetchToken) { if (logPII) { log.debug("fetchAndUnwrapKeys: token: " + keyFetchToken); } let currentState = this.currentAccountState; return Task.spawn(function* task() { // Sign out if we don't have a key fetch token. if (!keyFetchToken) { log.warn("improper fetchAndUnwrapKeys() call: token missing"); yield this.signOut(); return null; } let {kA, wrapKB} = yield this.fetchKeys(keyFetchToken); let data = yield currentState.getUserAccountData(); // Sanity check that the user hasn't changed out from under us if (data.keyFetchToken !== keyFetchToken) { throw new Error("Signed in user changed while fetching keys!"); } // Next statements must be synchronous until we setUserAccountData // so that we don't risk getting into a weird state. let kB_hex = CryptoUtils.xor(CommonUtils.hexToBytes(data.unwrapBKey), wrapKB); if (logPII) { log.debug("kB_hex: " + kB_hex); } data.kA = CommonUtils.bytesAsHex(kA); data.kB = CommonUtils.bytesAsHex(kB_hex); delete data.keyFetchToken; delete data.unwrapBKey; log.debug("Keys Obtained: kA=" + !!data.kA + ", kB=" + !!data.kB); if (logPII) { log.debug("Keys Obtained: kA=" + data.kA + ", kB=" + data.kB); } yield currentState.setUserAccountData(data); // 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); return data; }.bind(this)).then(result => currentState.resolve(result)); }, getAssertionFromCert: function(data, keyPair, cert, audience) { log.debug("getAssertionFromCert"); let payload = {}; let d = Promise.defer(); let options = { duration: ASSERTION_LIFETIME, localtimeOffsetMsec: this.localtimeOffsetMsec, now: this.now() }; let currentState = this.currentAccountState; // "audience" should look like "http://123done.org". // The generated assertion will expire in two minutes. jwcrypto.generateAssertion(cert, keyPair, audience, options, (err, signed) => { if (err) { log.error("getAssertionFromCert: " + err); d.reject(err); } else { log.debug("getAssertionFromCert returning signed: " + !!signed); if (logPII) { log.debug("getAssertionFromCert returning signed: " + signed); } d.resolve(signed); } }); return d.promise.then(result => currentState.resolve(result)); }, getCertificateSigned: function(sessionToken, serializedPublicKey, lifetime) { log.debug("getCertificateSigned: " + !!sessionToken + " " + !!serializedPublicKey); if (logPII) { log.debug("getCertificateSigned: " + sessionToken + " " + serializedPublicKey); } return this.fxAccountsClient.signCertificate( sessionToken, JSON.parse(serializedPublicKey), lifetime ); }, getUserAccountData: function() { return this.currentAccountState.getUserAccountData(); }, isUserEmailVerified: function isUserEmailVerified(data) { return !!(data && data.verified); }, /** * Setup for and if necessary do email verification polling. */ loadAndPoll: function() { let currentState = this.currentAccountState; return currentState.getUserAccountData() .then(data => { if (data && !this.isUserEmailVerified(data)) { this.pollEmailStatus(currentState, data.sessionToken, "start"); } return data; }); }, startVerifiedCheck: function(data) { log.debug("startVerifiedCheck", data && data.verified); if (logPII) { log.debug("startVerifiedCheck with user data", data); } // Get us to the verified state, then get the keys. This returns a promise // that will fire when we are completely ready. // // Login is truly complete once keys have been fetched, so once getKeys() // obtains and stores kA and kB, it will fire the onverified observer // notification. // 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).then( () => this.getKeys(), err => log.info("startVerifiedCheck promise was rejected: " + err) ); }, whenVerified: function(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.pollEmailStatus(currentState, data.sessionToken, "start"); } return currentState.whenVerifiedDeferred.promise.then( result => currentState.resolve(result) ); }, notifyObservers: function(topic, data) { log.debug("Notifying observers of " + topic); Services.obs.notifyObservers(null, topic, data); }, // XXX - pollEmailStatus should maybe be on the AccountState object? pollEmailStatus: function pollEmailStatus(currentState, sessionToken, why) { log.debug("entering pollEmailStatus: " + why); if (why == "start") { if (this.currentTimer) { log.debug("pollEmailStatus starting while existing timer is running"); clearTimeout(this.currentTimer); this.currentTimer = null; } // 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. this.pollStartDate = Date.now(); if (!currentState.whenVerifiedDeferred) { currentState.whenVerifiedDeferred = Promise.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(null, err => { log.info("the wait for user verification was stopped: " + err); }); } } this.checkEmailStatus(sessionToken) .then((response) => { log.debug("checkEmailStatus -> " + JSON.stringify(response)); if (response && response.verified) { currentState.getUserAccountData() .then((data) => { data.verified = true; return currentState.setUserAccountData(data); }) .then((data) => { // Now that the user is verified, we can proceed to fetch keys if (currentState.whenVerifiedDeferred) { currentState.whenVerifiedDeferred.resolve(data); delete currentState.whenVerifiedDeferred; } // Tell FxAccountsManager to clear its cache this.notifyObservers(ON_FXA_UPDATE_NOTIFICATION, ONVERIFIED_NOTIFICATION); }); } else { // Poll email status again after a short delay. this.pollEmailStatusAgain(currentState, sessionToken); } }, error => { let timeoutMs = undefined; if (error && error.retryAfter) { // If the server told us to back off, back off the requested amount. timeoutMs = (error.retryAfter + 3) * 1000; } // The server will return 401 if a request parameter is erroneous or // if the session token expired. Let's continue polling otherwise. if (!error || !error.code || error.code != 401) { this.pollEmailStatusAgain(currentState, sessionToken, timeoutMs); } }); }, // Poll email status using truncated exponential back-off. pollEmailStatusAgain: function (currentState, sessionToken, timeoutMs) { let ageMs = Date.now() - this.pollStartDate; if (ageMs >= this.POLL_SESSION) { if (currentState.whenVerifiedDeferred) { let error = new Error("User email verification timed out.") currentState.whenVerifiedDeferred.reject(error); delete currentState.whenVerifiedDeferred; } log.debug("polling session exceeded, giving up"); return; } if (timeoutMs === undefined) { let currentMinute = Math.ceil(ageMs / 60000); timeoutMs = currentMinute <= 2 ? this.VERIFICATION_POLL_TIMEOUT_INITIAL : this.VERIFICATION_POLL_TIMEOUT_SUBSEQUENT; } log.debug("polling with timeout = " + timeoutMs); this.currentTimer = setTimeout(() => { this.pollEmailStatus(currentState, sessionToken, "timer"); }, timeoutMs); }, _requireHttps: function() { let allowHttp = false; try { allowHttp = Services.prefs.getBoolPref("identity.fxaccounts.allowHttp"); } catch(e) { // Pref doesn't exist } return allowHttp !== true; }, // Return the URI of the remote UI flows. getAccountsSignUpURI: function() { let url = Services.urlFormatter.formatURLPref("identity.fxaccounts.remote.signup.uri"); if (this._requireHttps() && !/^https:/.test(url)) { // Comment to un-break emacs js-mode highlighting throw new Error("Firefox Accounts server must use HTTPS"); } return url; }, // Return the URI of the remote UI flows. getAccountsSignInURI: function() { let url = Services.urlFormatter.formatURLPref("identity.fxaccounts.remote.signin.uri"); if (this._requireHttps() && !/^https:/.test(url)) { // Comment to un-break emacs js-mode highlighting throw new Error("Firefox Accounts server must use HTTPS"); } return url; }, // Returns a promise that resolves with the URL to use to force a re-signin // of the current account. promiseAccountsForceSigninURI: function() { let url = Services.urlFormatter.formatURLPref("identity.fxaccounts.remote.force_auth.uri"); if (this._requireHttps() && !/^https:/.test(url)) { // Comment to un-break emacs js-mode highlighting throw new Error("Firefox Accounts server must use HTTPS"); } let currentState = this.currentAccountState; // but we need to append the email address onto a query string. return this.getSignedInUser().then(accountData => { if (!accountData) { return null; } let newQueryPortion = url.indexOf("?") == -1 ? "?" : "&"; newQueryPortion += "email=" + encodeURIComponent(accountData.email); return url + newQueryPortion; }).then(result => currentState.resolve(result)); }, // Returns a promise that resolves with the URL to use to change // the current account's profile image. // if settingToEdit is set, the profile page should hightlight that setting // for the user to edit. promiseAccountsChangeProfileURI: function(settingToEdit = null) { let url = Services.urlFormatter.formatURLPref("identity.fxaccounts.settings.uri"); if (settingToEdit) { url += (url.indexOf("?") == -1 ? "?" : "&") + "setting=" + encodeURIComponent(settingToEdit); } if (this._requireHttps() && !/^https:/.test(url)) { // Comment to un-break emacs js-mode highlighting throw new Error("Firefox Accounts server must use HTTPS"); } let currentState = this.currentAccountState; // but we need to append the email address onto a query string. return this.getSignedInUser().then(accountData => { if (!accountData) { return null; } let newQueryPortion = url.indexOf("?") == -1 ? "?" : "&"; newQueryPortion += "email=" + encodeURIComponent(accountData.email); newQueryPortion += "&uid=" + encodeURIComponent(accountData.uid); return url + newQueryPortion; }).then(result => currentState.resolve(result)); }, // Returns a promise that resolves with the URL to use to manage the current // user's FxA acct. promiseAccountsManageURI: function() { let url = Services.urlFormatter.formatURLPref("identity.fxaccounts.settings.uri"); if (this._requireHttps() && !/^https:/.test(url)) { // Comment to un-break emacs js-mode highlighting throw new Error("Firefox Accounts server must use HTTPS"); } let currentState = this.currentAccountState; // but we need to append the uid and email address onto a query string // (if the server has no matching uid it will offer to sign in with the // email address) return this.getSignedInUser().then(accountData => { if (!accountData) { return null; } let newQueryPortion = url.indexOf("?") == -1 ? "?" : "&"; newQueryPortion += "uid=" + encodeURIComponent(accountData.uid) + "&email=" + encodeURIComponent(accountData.email); return url + newQueryPortion; }).then(result => currentState.resolve(result)); }, /** * 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. * } * * @return Promise. * 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 */ getOAuthToken: Task.async(function* (options = {}) { log.debug("getOAuthToken enter"); let scope = options.scope; if (typeof scope === "string") { scope = [scope]; } if (!scope || !scope.length) { throw this._error(ERROR_INVALID_PARAMETER, "Missing or invalid 'scope' option"); } yield this._getVerifiedAccountOrReject(); // Early exit for a cached token. let currentState = this.currentAccountState; let cached = currentState.getCachedToken(scope); if (cached) { log.debug("getOAuthToken returning a cached token"); return cached.token; } // We are going to hit the server - this is the string we pass to it. let scopeString = scope.join(" "); let client = options.client; if (!client) { try { let defaultURL = Services.urlFormatter.formatURLPref("identity.fxaccounts.remote.oauth.uri"); client = new FxAccountsOAuthGrantClient({ serverURL: defaultURL, client_id: FX_OAUTH_CLIENT_ID }); } catch (e) { throw this._error(ERROR_INVALID_PARAMETER, e); } } let oAuthURL = client.serverURL.href; try { log.debug("getOAuthToken fetching new token from", oAuthURL); let assertion = yield this.getAssertion(oAuthURL); let result = yield client.getTokenFromAssertion(assertion, scopeString); let token = result.access_token; // If we got one, cache it. if (token) { let entry = {token: token, server: oAuthURL}; // But before we do, check the cache again - if we find one now, it // means someone else concurrently requested the same scope and beat // us to the cache write. To be nice to the server, we revoke the one // we just got and return the newly cached value. let cached = currentState.getCachedToken(scope); if (cached) { log.debug("Detected a race for this token - revoking the new one."); this._destroyOAuthToken(entry); return cached.token; } currentState.setCachedToken(scope, entry); } return token; } catch (err) { throw this._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. This function will always resolve, even if * an unknown token is passed. */ removeCachedOAuthToken: Task.async(function* (options) { if (!options.token || typeof options.token !== "string") { throw this._error(ERROR_INVALID_PARAMETER, "Missing or invalid 'token' option"); } let currentState = this.currentAccountState; 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); }); } }), _getVerifiedAccountOrReject: Task.async(function* () { let data = yield 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); } }), /* * 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: function (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")) { return aError; } return this._error(ERROR_UNKNOWN, aError); }, _error: function(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; }, /** * Get the user's account and profile data * * @param options * { * contentUrl: (string) Used by the FxAccountsProfileChannel. * Defaults to pref identity.fxaccounts.settings.uri * profileServerUrl: (string) Used by the FxAccountsProfileChannel. * Defaults to pref identity.fxaccounts.remote.profile.uri * } * * @return Promise. * The promise resolves to an accountData object with extra profile * information such as profileImageUrl, or rejects with * an error object ({error: ERROR, details: {}}) of the following: * INVALID_PARAMETER * NO_ACCOUNT * UNVERIFIED_ACCOUNT * NETWORK_ERROR * AUTH_ERROR * UNKNOWN_ERROR */ getSignedInUserProfile: function () { let accountState = this.currentAccountState; return accountState.getProfile() .then((profileData) => { let profile = JSON.parse(JSON.stringify(profileData)); return accountState.resolve(profile); }, (error) => { log.error("Could not retrieve profile data", error); return accountState.reject(error); }) .then(null, err => Promise.reject(this._errorToErrorClass(err))); }, }; /** * JSONStorage constructor that creates instances that may set/get * to a specified file, in a directory that will be created if it * doesn't exist. * * @param options { * filename: of the file to write to * baseDir: directory where the file resides * } * @return instance */ function JSONStorage(options) { this.baseDir = options.baseDir; this.path = OS.Path.join(options.baseDir, options.filename); this.oauthTokensPath = OS.Path.join(options.baseDir, options.oauthTokensFilename); }; JSONStorage.prototype = { set: function(contents) { return OS.File.makeDir(this.baseDir, {ignoreExisting: true}) .then(CommonUtils.writeJSON.bind(null, contents, this.path)); }, get: function() { return CommonUtils.readJSON(this.path); }, setOAuthTokens: function(contents) { return OS.File.makeDir(this.baseDir, {ignoreExisting: true}) .then(CommonUtils.writeJSON.bind(null, contents, this.oauthTokensPath)); }, getOAuthTokens: function(contents) { return CommonUtils.readJSON(this.oauthTokensPath); }, }; /** * LoginManagerStorage constructor that creates instances that may set/get * from a combination of a clear-text JSON file and stored securely in * the nsILoginManager. * * @param options { * filename: of the plain-text file to write to * baseDir: directory where the file resides * } * @return instance */ function LoginManagerStorage(options) { // we reuse the JSONStorage for writing the plain-text stuff. this.jsonStorage = new JSONStorage(options); } LoginManagerStorage.prototype = { // The fields in the credentials JSON object that are stored in plain-text // in the profile directory. All other fields are stored in the login manager, // and thus are only available when the master-password is unlocked. // a hook point for testing. get _isLoggedIn() { return Services.logins.isLoggedIn; }, // Clear any data from the login manager. Returns true if the login manager // was unlocked (even if no existing logins existed) or false if it was // locked (meaning we don't even know if it existed or not.) _clearLoginMgrData: Task.async(function* () { try { // Services.logins might be third-party and broken... yield Services.logins.initializationPromise; if (!this._isLoggedIn) { return false; } let logins = Services.logins.findLogins({}, FXA_PWDMGR_HOST, null, FXA_PWDMGR_REALM); for (let login of logins) { Services.logins.removeLogin(login); } return true; } catch (ex) { log.error("Failed to clear login data: ${}", ex); return false; } }), set: Task.async(function* (contents) { if (!contents) { // User is signing out - write the null to the json file. yield this.jsonStorage.set(contents); // And nuke it from the login manager. let cleared = yield this._clearLoginMgrData(); if (!cleared) { // just log a message - we verify that the email address matches when // we reload it, so having a stale entry doesn't really hurt. log.info("not removing credentials from login manager - not logged in"); } return; } // We are saving actual data. // Split the data into 2 chunks - one to go to the plain-text, and the // other to write to the login manager. let toWriteJSON = {version: contents.version}; let accountDataJSON = toWriteJSON.accountData = {}; let toWriteLoginMgr = {version: contents.version}; let accountDataLoginMgr = toWriteLoginMgr.accountData = {}; for (let [name, value] of Iterator(contents.accountData)) { if (FXA_PWDMGR_PLAINTEXT_FIELDS.indexOf(name) >= 0) { accountDataJSON[name] = value; } else { accountDataLoginMgr[name] = value; } } yield this.jsonStorage.set(toWriteJSON); try { // Services.logins might be third-party and broken... // and the stuff into the login manager. yield Services.logins.initializationPromise; // If MP is locked we silently fail - the user may need to re-auth // next startup. if (!this._isLoggedIn) { log.info("not saving credentials to login manager - not logged in"); return; } // write the rest of the data to the login manager. let loginInfo = new Components.Constructor( "@mozilla.org/login-manager/loginInfo;1", Ci.nsILoginInfo, "init"); let login = new loginInfo(FXA_PWDMGR_HOST, null, // aFormSubmitURL, FXA_PWDMGR_REALM, // aHttpRealm, contents.accountData.email, // aUsername JSON.stringify(toWriteLoginMgr), // aPassword "", // aUsernameField "");// aPasswordField let existingLogins = Services.logins.findLogins({}, FXA_PWDMGR_HOST, null, FXA_PWDMGR_REALM); if (existingLogins.length) { Services.logins.modifyLogin(existingLogins[0], login); } else { Services.logins.addLogin(login); } } catch (ex) { log.error("Failed to save data to the login manager: ${}", ex); } }), get: Task.async(function* () { // we need to suck some data from the .json file in the profile dir and // some other from the login manager. let data = yield this.jsonStorage.get(); if (!data) { // no user logged in, nuke the storage data incase we couldn't remove // it previously and then we are done. yield this._clearLoginMgrData(); return null; } // if we have encryption keys it must have been saved before we // used the login manager, so re-save it. if (data.accountData.kA || data.accountData.kB || data.keyFetchToken) { // We need to migrate, but the MP might be locked (eg, on the first run // with this enabled, we will get here very soon after startup, so will // certainly be locked.) This means we can't actually store the data in // the login manager (and thus might lose it if we migrated now) // So if the MP is locked, we *don't* migrate, but still just return // the subset of data we now store in the JSON. // This will cause sync to notice the lack of keys, force an unlock then // re-fetch the account data to see if the keys are there. At *that* // point we will end up back here, but because the MP is now unlocked // we can actually perform the migration. if (!this._isLoggedIn) { // return the "safe" subset but leave the storage alone. log.info("account data needs migration to the login manager but the MP is locked."); let result = { version: data.version, accountData: {}, }; for (let fieldName of FXA_PWDMGR_PLAINTEXT_FIELDS) { result.accountData[fieldName] = data.accountData[fieldName]; } return result; } // actually migrate - just calling .set() will split everything up. log.info("account data is being migrated to the login manager."); yield this.set(data); } try { // Services.logins might be third-party and broken... // read the data from the login manager and merge it for return. yield Services.logins.initializationPromise; if (!this._isLoggedIn) { log.info("returning partial account data as the login manager is locked."); return data; } let logins = Services.logins.findLogins({}, FXA_PWDMGR_HOST, null, FXA_PWDMGR_REALM); if (logins.length == 0) { // This could happen if the MP was locked when we wrote the data. log.info("Can't find the rest of the credentials in the login manager"); return data; } let login = logins[0]; if (login.username == data.accountData.email) { let lmData = JSON.parse(login.password); if (lmData.version == data.version) { // Merge the login manager data copyObjectProperties(lmData.accountData, data.accountData); } else { log.info("version field in the login manager doesn't match - ignoring it"); yield this._clearLoginMgrData(); } } else { log.info("username in the login manager doesn't match - ignoring it"); yield this._clearLoginMgrData(); } } catch (ex) { log.error("Failed to get data from the login manager: ${}", ex); } return data; }), // OAuth tokens are always written to disk, so delegate to our JSON storage. // (Bug 1013064 comments 23-25 explain why we save the sessionToken into the // plain JSON file, and the same logic applies for oauthTokens being in JSON) getOAuthTokens() { return this.jsonStorage.getOAuthTokens(); }, setOAuthTokens(contents) { return this.jsonStorage.setOAuthTokens(contents); }, } // A getter for the instance to export XPCOMUtils.defineLazyGetter(this, "fxAccounts", function() { let a = new FxAccounts(); // XXX Bug 947061 - We need a strategy for resuming email verification after // browser restart a.loadAndPoll(); return a; });