зеркало из https://github.com/mozilla/gecko-dev.git
598 строки
23 KiB
JavaScript
598 строки
23 KiB
JavaScript
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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"use strict";
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this.EXPORTED_SYMBOLS = [
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"FxAccountsStorageManager",
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];
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const {classes: Cc, interfaces: Ci, utils: Cu} = Components;
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Cu.import("resource://gre/modules/Services.jsm");
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Cu.import("resource://gre/modules/Task.jsm");
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Cu.import("resource://gre/modules/FxAccountsCommon.js");
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Cu.import("resource://gre/modules/osfile.jsm");
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Cu.import("resource://services-common/utils.js");
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this.FxAccountsStorageManager = function(options = {}) {
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this.options = {
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filename: options.filename || DEFAULT_STORAGE_FILENAME,
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baseDir: options.baseDir || OS.Constants.Path.profileDir,
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}
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this.plainStorage = new JSONStorage(this.options);
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// On b2g we have no loginManager for secure storage, and tests may want
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// to pretend secure storage isn't available.
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let useSecure = 'useSecure' in options ? options.useSecure : haveLoginManager;
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if (useSecure) {
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this.secureStorage = new LoginManagerStorage();
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} else {
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this.secureStorage = null;
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}
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this._clearCachedData();
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// See .initialize() below - this protects against it not being called.
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this._promiseInitialized = Promise.reject("initialize not called");
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// A promise to avoid storage races - see _queueStorageOperation
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this._promiseStorageComplete = Promise.resolve();
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}
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this.FxAccountsStorageManager.prototype = {
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_initialized: false,
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_needToReadSecure: true,
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// An initialization routine that *looks* synchronous to the callers, but
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// is actually async as everything else waits for it to complete.
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initialize(accountData) {
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if (this._initialized) {
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throw new Error("already initialized");
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}
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this._initialized = true;
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// If we just throw away our pre-rejected promise it is reported as an
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// unhandled exception when it is GCd - so add an empty .catch handler here
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// to prevent this.
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this._promiseInitialized.catch(() => {});
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this._promiseInitialized = this._initialize(accountData);
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},
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_initialize: Task.async(function* (accountData) {
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log.trace("initializing new storage manager");
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try {
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if (accountData) {
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// If accountData is passed we don't need to read any storage.
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this._needToReadSecure = false;
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// split it into the 2 parts, write it and we are done.
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for (let [name, val] of Iterator(accountData)) {
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if (FXA_PWDMGR_PLAINTEXT_FIELDS.has(name)) {
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this.cachedPlain[name] = val;
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} else if (FXA_PWDMGR_SECURE_FIELDS.has(name)) {
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this.cachedSecure[name] = val;
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} else {
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// Hopefully it's an "in memory" field. If it's not we log a warning
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// but still treat it as such (so it will still be available in this
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// session but isn't persisted anywhere.)
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if (!FXA_PWDMGR_MEMORY_FIELDS.has(name)) {
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log.warn("Unknown FxA field name in user data, treating as in-memory", name);
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}
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this.cachedMemory[name] = val;
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}
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}
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// write it out and we are done.
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yield this._write();
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return;
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}
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// So we were initialized without account data - that means we need to
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// read the state from storage. We try and read plain storage first and
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// only attempt to read secure storage if the plain storage had a user.
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this._needToReadSecure = yield this._readPlainStorage();
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if (this._needToReadSecure && this.secureStorage) {
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yield this._doReadAndUpdateSecure();
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}
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} finally {
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log.trace("initializing of new storage manager done");
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}
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}),
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finalize() {
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// We can't throw this instance away while it is still writing or we may
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// end up racing with the newly created one.
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log.trace("StorageManager finalizing");
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return this._promiseInitialized.then(() => {
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return this._promiseStorageComplete;
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}).then(() => {
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this._promiseStorageComplete = null;
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this._promiseInitialized = null;
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this._clearCachedData();
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log.trace("StorageManager finalized");
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})
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},
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// We want to make sure we don't end up doing multiple storage requests
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// concurrently - which has a small window for reads if the master-password
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// is locked at initialization time and becomes unlocked later, and always
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// has an opportunity for updates.
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// We also want to make sure we finished writing when finalizing, so we
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// can't accidentally end up with the previous user's write finishing after
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// a signOut attempts to clear it.
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// So all such operations "queue" themselves via this.
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_queueStorageOperation(func) {
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// |result| is the promise we return - it has no .catch handler, so callers
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// of the storage operation still see failure as a normal rejection.
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let result = this._promiseStorageComplete.then(func);
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// But the promise we assign to _promiseStorageComplete *does* have a catch
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// handler so that rejections in one storage operation does not prevent
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// future operations from starting (ie, _promiseStorageComplete must never
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// be in a rejected state)
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this._promiseStorageComplete = result.catch(err => {
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log.error("${func} failed: ${err}", {func, err});
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});
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return result;
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},
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// Get the account data by combining the plain and secure storage.
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// If fieldNames is specified, it may be a string or an array of strings,
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// and only those fields are returned. If not specified the entire account
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// data is returned except for "in memory" fields. Note that not specifying
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// field names will soon be deprecated/removed - we want all callers to
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// specify the fields they care about.
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getAccountData: Task.async(function* (fieldNames = null) {
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yield this._promiseInitialized;
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// We know we are initialized - this means our .cachedPlain is accurate
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// and doesn't need to be read (it was read if necessary by initialize).
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// So if there's no uid, there's no user signed in.
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if (!('uid' in this.cachedPlain)) {
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return null;
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}
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let result = {};
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if (fieldNames === null) {
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// The "old" deprecated way of fetching a logged in user.
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for (let [name, value] of Iterator(this.cachedPlain)) {
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result[name] = value;
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}
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// But the secure data may not have been read, so try that now.
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yield this._maybeReadAndUpdateSecure();
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// .cachedSecure now has as much as it possibly can (which is possibly
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// nothing if (a) secure storage remains locked and (b) we've never updated
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// a field to be stored in secure storage.)
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for (let [name, value] of Iterator(this.cachedSecure)) {
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result[name] = value;
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}
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// Note we don't return cachedMemory fields here - they must be explicitly
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// requested.
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return result;
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}
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// The new explicit way of getting attributes.
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if (!Array.isArray(fieldNames)) {
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fieldNames = [fieldNames];
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}
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let checkedSecure = false;
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for (let fieldName of fieldNames) {
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if (FXA_PWDMGR_MEMORY_FIELDS.has(fieldName)) {
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if (this.cachedMemory[fieldName] !== undefined) {
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result[fieldName] = this.cachedMemory[fieldName];
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}
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} else if (FXA_PWDMGR_PLAINTEXT_FIELDS.has(fieldName)) {
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if (this.cachedPlain[fieldName] !== undefined) {
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result[fieldName] = this.cachedPlain[fieldName];
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}
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} else if (FXA_PWDMGR_SECURE_FIELDS.has(fieldName)) {
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// We may not have read secure storage yet.
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if (!checkedSecure) {
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yield this._maybeReadAndUpdateSecure();
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checkedSecure = true;
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}
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if (this.cachedSecure[fieldName] !== undefined) {
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result[fieldName] = this.cachedSecure[fieldName];
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}
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} else {
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throw new Error("unexpected field '" + name + "'");
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}
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}
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return result;
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}),
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// Update just the specified fields. This DOES NOT allow you to change to
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// a different user, nor to set the user as signed-out.
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updateAccountData: Task.async(function* (newFields) {
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yield this._promiseInitialized;
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if (!('uid' in this.cachedPlain)) {
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// If this storage instance shows no logged in user, then you can't
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// update fields.
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throw new Error("No user is logged in");
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}
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if (!newFields || 'uid' in newFields || 'email' in newFields) {
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// Once we support
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// user changing email address this may need to change, but it's not
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// clear how we would be told of such a change anyway...
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throw new Error("Can't change uid or email address");
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}
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log.debug("_updateAccountData with items", Object.keys(newFields));
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// work out what bucket.
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for (let [name, value] of Iterator(newFields)) {
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if (FXA_PWDMGR_MEMORY_FIELDS.has(name)) {
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if (value == null) {
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delete this.cachedMemory[name];
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} else {
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this.cachedMemory[name] = value;
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}
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} else if (FXA_PWDMGR_PLAINTEXT_FIELDS.has(name)) {
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if (value == null) {
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delete this.cachedPlain[name];
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} else {
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this.cachedPlain[name] = value;
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}
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} else if (FXA_PWDMGR_SECURE_FIELDS.has(name)) {
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// don't do the "delete on null" thing here - we need to keep it until
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// we have managed to read so we can nuke it on write.
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this.cachedSecure[name] = value;
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} else {
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// Throwing seems reasonable here as some client code has explicitly
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// specified the field name, so it's either confused or needs to update
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// how this field is to be treated.
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throw new Error("unexpected field '" + name + "'");
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}
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}
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// If we haven't yet read the secure data, do so now, else we may write
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// out partial data.
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yield this._maybeReadAndUpdateSecure();
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// Now save it - but don't wait on the _write promise - it's queued up as
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// a storage operation, so .finalize() will wait for completion, but no need
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// for us to.
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this._write();
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}),
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_clearCachedData() {
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this.cachedMemory = {};
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this.cachedPlain = {};
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// If we don't have secure storage available we have cachedPlain and
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// cachedSecure be the same object.
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this.cachedSecure = this.secureStorage == null ? this.cachedPlain : {};
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},
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/* Reads the plain storage and caches the read values in this.cachedPlain.
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Only ever called once and unlike the "secure" storage, is expected to never
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fail (ie, plain storage is considered always available, whereas secure
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storage may be unavailable if it is locked).
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Returns a promise that resolves with true if valid account data was found,
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false otherwise.
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Note: _readPlainStorage is only called during initialize, so isn't
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protected via _queueStorageOperation() nor _promiseInitialized.
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*/
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_readPlainStorage: Task.async(function* () {
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let got;
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try {
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got = yield this.plainStorage.get();
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} catch(err) {
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// File hasn't been created yet. That will be done
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// when write is called.
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if (!(err instanceof OS.File.Error) || !err.becauseNoSuchFile) {
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log.error("Failed to read plain storage", err);
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}
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// either way, we return null.
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got = null;
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}
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if (!got || !got.accountData || !got.accountData.uid ||
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got.version != DATA_FORMAT_VERSION) {
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return false;
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}
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// We need to update our .cachedPlain, but can't just assign to it as
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// it may need to be the exact same object as .cachedSecure
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// As a sanity check, .cachedPlain must be empty (as we are called by init)
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// XXX - this would be a good use-case for a RuntimeAssert or similar, as
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// being added in bug 1080457.
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if (Object.keys(this.cachedPlain).length != 0) {
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throw new Error("should be impossible to have cached data already.")
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}
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for (let [name, value] of Iterator(got.accountData)) {
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this.cachedPlain[name] = value;
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}
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return true;
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}),
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/* If we haven't managed to read the secure storage, try now, so
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we can merge our cached data with the data that's already been set.
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*/
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_maybeReadAndUpdateSecure: Task.async(function* () {
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if (this.secureStorage == null || !this._needToReadSecure) {
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return;
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}
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return this._queueStorageOperation(() => {
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if (this._needToReadSecure) { // we might have read it by now!
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return this._doReadAndUpdateSecure();
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}
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});
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}),
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/* Unconditionally read the secure storage and merge our cached data (ie, data
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which has already been set while the secure storage was locked) with
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the read data
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*/
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_doReadAndUpdateSecure: Task.async(function* () {
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let { uid, email } = this.cachedPlain;
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try {
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log.debug("reading secure storage with existing", Object.keys(this.cachedSecure));
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// If we already have anything in .cachedSecure it means something has
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// updated cachedSecure before we've read it. That means that after we do
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// manage to read we must write back the merged data.
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let needWrite = Object.keys(this.cachedSecure).length != 0;
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let readSecure = yield this.secureStorage.get(uid, email);
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// and update our cached data with it - anything already in .cachedSecure
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// wins (including the fact it may be null or undefined, the latter
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// which means it will be removed from storage.
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if (readSecure && readSecure.version != DATA_FORMAT_VERSION) {
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log.warn("got secure data but the data format version doesn't match");
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readSecure = null;
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}
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if (readSecure && readSecure.accountData) {
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log.debug("secure read fetched items", Object.keys(readSecure.accountData));
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for (let [name, value] of Iterator(readSecure.accountData)) {
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if (!(name in this.cachedSecure)) {
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this.cachedSecure[name] = value;
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}
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}
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if (needWrite) {
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log.debug("successfully read secure data; writing updated data back")
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yield this._doWriteSecure();
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}
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}
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this._needToReadSecure = false;
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} catch (ex if ex instanceof this.secureStorage.STORAGE_LOCKED) {
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log.debug("setAccountData: secure storage is locked trying to read");
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} catch (ex) {
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log.error("failed to read secure storage", ex);
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throw ex;
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}
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}),
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_write() {
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// We don't want multiple writes happening concurrently, and we also need to
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// know when an "old" storage manager is done (this.finalize() waits for this)
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return this._queueStorageOperation(() => this.__write());
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},
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__write: Task.async(function* () {
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// Write everything back - later we could track what's actually dirty,
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// but for now we write it all.
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log.debug("writing plain storage", Object.keys(this.cachedPlain));
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let toWritePlain = {
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version: DATA_FORMAT_VERSION,
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accountData: this.cachedPlain,
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}
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yield this.plainStorage.set(toWritePlain);
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// If we have no secure storage manager we are done.
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if (this.secureStorage == null) {
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return;
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}
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// and only attempt to write to secure storage if we've managed to read it,
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// otherwise we might clobber data that's already there.
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if (!this._needToReadSecure) {
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yield this._doWriteSecure();
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}
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}),
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/* Do the actual write of secure data. Caller is expected to check if we actually
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need to write and to ensure we are in a queued storage operation.
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*/
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_doWriteSecure: Task.async(function* () {
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// We need to remove null items here.
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for (let [name, value] of Iterator(this.cachedSecure)) {
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if (value == null) {
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delete this.cachedSecure[name];
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}
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}
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log.debug("writing secure storage", Object.keys(this.cachedSecure));
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let toWriteSecure = {
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version: DATA_FORMAT_VERSION,
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accountData: this.cachedSecure,
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}
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try {
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yield this.secureStorage.set(this.cachedPlain.email, toWriteSecure);
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} catch (ex if ex instanceof this.secureStorage.STORAGE_LOCKED) {
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// This shouldn't be possible as once it is unlocked it can't be
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// re-locked, and we can only be here if we've previously managed to
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// read.
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log.error("setAccountData: secure storage is locked trying to write");
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}
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}),
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// Delete the data for an account - ie, called on "sign out".
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deleteAccountData() {
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return this._queueStorageOperation(() => this._deleteAccountData());
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},
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_deleteAccountData: Task.async(function() {
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log.debug("removing account data");
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yield this._promiseInitialized;
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yield this.plainStorage.set(null);
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if (this.secureStorage) {
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yield this.secureStorage.set(null);
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}
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this._clearCachedData();
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log.debug("account data reset");
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}),
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}
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/**
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* JSONStorage constructor that creates instances that may set/get
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* to a specified file, in a directory that will be created if it
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* doesn't exist.
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*
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* @param options {
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* filename: of the file to write to
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* baseDir: directory where the file resides
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* }
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* @return instance
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*/
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function JSONStorage(options) {
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this.baseDir = options.baseDir;
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this.path = OS.Path.join(options.baseDir, options.filename);
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};
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JSONStorage.prototype = {
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set: function(contents) {
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log.trace("starting write of json user data", contents ? Object.keys(contents.accountData) : "null");
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let start = Date.now();
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return OS.File.makeDir(this.baseDir, {ignoreExisting: true})
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.then(CommonUtils.writeJSON.bind(null, contents, this.path))
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.then(result => {
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log.trace("finished write of json user data - took", Date.now()-start);
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return result;
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});
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},
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get: function() {
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log.trace("starting fetch of json user data");
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let start = Date.now();
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return CommonUtils.readJSON(this.path).then(result => {
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log.trace("finished fetch of json user data - took", Date.now()-start);
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return result;
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});
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},
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};
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function StorageLockedError() {
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}
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/**
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* LoginManagerStorage constructor that creates instances that set/get
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* data stored securely in the nsILoginManager.
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*
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* @return instance
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*/
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function LoginManagerStorage() {
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}
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LoginManagerStorage.prototype = {
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STORAGE_LOCKED: StorageLockedError,
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// The fields in the credentials JSON object that are stored in plain-text
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// in the profile directory. All other fields are stored in the login manager,
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// and thus are only available when the master-password is unlocked.
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// a hook point for testing.
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get _isLoggedIn() {
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return Services.logins.isLoggedIn;
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},
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// Clear any data from the login manager. Returns true if the login manager
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// 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* (email, contents) {
|
|
if (!contents) {
|
|
// Nuke it from the login manager.
|
|
let cleared = yield this._clearLoginMgrData();
|
|
if (!cleared) {
|
|
// just log a message - we verify that the uid 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");
|
|
}
|
|
log.trace("storage set finished clearing account data");
|
|
return;
|
|
}
|
|
|
|
// We are saving actual data.
|
|
log.trace("starting write of user data to the login manager");
|
|
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");
|
|
throw new this.STORAGE_LOCKED();
|
|
}
|
|
// write 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,
|
|
email, // aUsername
|
|
JSON.stringify(contents), // 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);
|
|
}
|
|
log.trace("finished write of user data to the login manager");
|
|
} catch (ex if ex instanceof this.STORAGE_LOCKED) {
|
|
throw ex;
|
|
} catch (ex) {
|
|
// just log and consume the error here - it may be a 3rd party login
|
|
// manager replacement that's simply broken.
|
|
log.error("Failed to save data to the login manager", ex);
|
|
}
|
|
}),
|
|
|
|
get: Task.async(function* (uid, email) {
|
|
log.trace("starting fetch of user data from the login manager");
|
|
|
|
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.");
|
|
throw new this.STORAGE_LOCKED();
|
|
}
|
|
|
|
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 any credentials in the login manager");
|
|
return null;
|
|
}
|
|
let login = logins[0];
|
|
// Support either the uid or the email as the username - we plan to move
|
|
// to storing the uid once Fx41 hits the release channel as the code below
|
|
// that handles either first landed in 41. Bug 1183951 is to store the uid.
|
|
if (login.username == uid || login.username == email) {
|
|
return JSON.parse(login.password);
|
|
}
|
|
log.info("username in the login manager doesn't match - ignoring it");
|
|
yield this._clearLoginMgrData();
|
|
} catch (ex if ex instanceof this.STORAGE_LOCKED) {
|
|
throw ex;
|
|
} catch (ex) {
|
|
// just log and consume the error here - it may be a 3rd party login
|
|
// manager replacement that's simply broken.
|
|
log.error("Failed to get data from the login manager", ex);
|
|
}
|
|
return null;
|
|
}),
|
|
}
|
|
|
|
// A global variable to indicate if the login manager is available - it doesn't
|
|
// exist on b2g. Defined here as the use of preprocessor directives skews line
|
|
// numbers in the runtime, meaning stack-traces etc end up off by a few lines.
|
|
// Doing it at the end of the file makes that less of a pita.
|
|
var haveLoginManager =
|
|
#if defined(MOZ_B2G)
|
|
false;
|
|
#else
|
|
true;
|
|
#endif
|