mirror of
https://github.com/mozilla/gecko-dev.git
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651 lines
20 KiB
JavaScript
651 lines
20 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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this.EXPORTED_SYMBOLS = ["XPCOMUtils", "Services", "NetUtil", "PlacesUtils",
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"FileUtils", "Utils", "Async", "Svc", "Str"];
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const {classes: Cc, interfaces: Ci, results: Cr, utils: Cu} = Components;
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Cu.import("resource://services-common/log4moz.js");
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Cu.import("resource://services-common/observers.js");
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Cu.import("resource://services-common/stringbundle.js");
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Cu.import("resource://services-common/utils.js");
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Cu.import("resource://services-common/async.js", this);
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Cu.import("resource://services-crypto/utils.js");
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Cu.import("resource://services-sync/constants.js");
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Cu.import("resource://gre/modules/FileUtils.jsm", this);
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Cu.import("resource://gre/modules/NetUtil.jsm", this);
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Cu.import("resource://gre/modules/PlacesUtils.jsm", this);
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Cu.import("resource://gre/modules/Preferences.jsm");
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Cu.import("resource://gre/modules/Services.jsm", this);
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Cu.import("resource://gre/modules/XPCOMUtils.jsm", this);
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/*
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* Utility functions
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*/
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this.Utils = {
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// Alias in functions from CommonUtils. These previously were defined here.
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// In the ideal world, references to these would be removed.
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nextTick: CommonUtils.nextTick,
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namedTimer: CommonUtils.namedTimer,
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exceptionStr: CommonUtils.exceptionStr,
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stackTrace: CommonUtils.stackTrace,
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makeURI: CommonUtils.makeURI,
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encodeUTF8: CommonUtils.encodeUTF8,
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decodeUTF8: CommonUtils.decodeUTF8,
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safeAtoB: CommonUtils.safeAtoB,
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byteArrayToString: CommonUtils.byteArrayToString,
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bytesAsHex: CommonUtils.bytesAsHex,
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encodeBase32: CommonUtils.encodeBase32,
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decodeBase32: CommonUtils.decodeBase32,
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// Aliases from CryptoUtils.
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generateRandomBytes: CryptoUtils.generateRandomBytes,
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computeHTTPMACSHA1: CryptoUtils.computeHTTPMACSHA1,
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digestUTF8: CryptoUtils.digestUTF8,
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digestBytes: CryptoUtils.digestBytes,
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sha1: CryptoUtils.sha1,
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sha1Base32: CryptoUtils.sha1Base32,
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makeHMACKey: CryptoUtils.makeHMACKey,
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makeHMACHasher: CryptoUtils.makeHMACHasher,
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hkdfExpand: CryptoUtils.hkdfExpand,
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pbkdf2Generate: CryptoUtils.pbkdf2Generate,
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deriveKeyFromPassphrase: CryptoUtils.deriveKeyFromPassphrase,
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getHTTPMACSHA1Header: CryptoUtils.getHTTPMACSHA1Header,
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/**
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* Wrap a function to catch all exceptions and log them
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*
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* @usage MyObj._catch = Utils.catch;
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* MyObj.foo = function() { this._catch(func)(); }
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*
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* Optionally pass a function which will be called if an
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* exception occurs.
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*/
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catch: function Utils_catch(func, exceptionCallback) {
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let thisArg = this;
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return function WrappedCatch() {
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try {
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return func.call(thisArg);
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}
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catch(ex) {
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thisArg._log.debug("Exception: " + Utils.exceptionStr(ex));
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if (exceptionCallback) {
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return exceptionCallback.call(thisArg, ex);
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}
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return null;
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}
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};
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},
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/**
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* Wrap a function to call lock before calling the function then unlock.
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*
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* @usage MyObj._lock = Utils.lock;
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* MyObj.foo = function() { this._lock(func)(); }
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*/
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lock: function lock(label, func) {
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let thisArg = this;
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return function WrappedLock() {
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if (!thisArg.lock()) {
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throw "Could not acquire lock. Label: \"" + label + "\".";
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}
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try {
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return func.call(thisArg);
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}
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finally {
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thisArg.unlock();
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}
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};
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},
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isLockException: function isLockException(ex) {
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return ex && ex.indexOf && ex.indexOf("Could not acquire lock.") == 0;
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},
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/**
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* Wrap functions to notify when it starts and finishes executing or if it
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* threw an error.
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*
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* The message is a combination of a provided prefix, the local name, and
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* the event. Possible events are: "start", "finish", "error". The subject
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* is the function's return value on "finish" or the caught exception on
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* "error". The data argument is the predefined data value.
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*
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* Example:
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*
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* @usage function MyObj(name) {
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* this.name = name;
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* this._notify = Utils.notify("obj:");
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* }
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* MyObj.prototype = {
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* foo: function() this._notify("func", "data-arg", function () {
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* //...
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* }(),
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* };
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*/
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notify: function Utils_notify(prefix) {
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return function NotifyMaker(name, data, func) {
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let thisArg = this;
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let notify = function(state, subject) {
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let mesg = prefix + name + ":" + state;
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thisArg._log.trace("Event: " + mesg);
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Observers.notify(mesg, subject, data);
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};
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return function WrappedNotify() {
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try {
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notify("start", null);
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let ret = func.call(thisArg);
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notify("finish", ret);
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return ret;
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}
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catch(ex) {
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notify("error", ex);
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throw ex;
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}
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};
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};
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},
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runInTransaction: function(db, callback, thisObj) {
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let hasTransaction = false;
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try {
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db.beginTransaction();
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hasTransaction = true;
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} catch(e) { /* om nom nom exceptions */ }
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try {
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return callback.call(thisObj);
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} finally {
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if (hasTransaction) {
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db.commitTransaction();
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}
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}
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},
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/**
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* GUIDs are 9 random bytes encoded with base64url (RFC 4648).
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* That makes them 12 characters long with 72 bits of entropy.
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*/
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makeGUID: function makeGUID() {
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return CommonUtils.encodeBase64URL(Utils.generateRandomBytes(9));
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},
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_base64url_regex: /^[-abcdefghijklmnopqrstuvwxyz0123456789_]{12}$/i,
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checkGUID: function checkGUID(guid) {
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return !!guid && this._base64url_regex.test(guid);
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},
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/**
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* Add a simple getter/setter to an object that defers access of a property
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* to an inner property.
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*
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* @param obj
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* Object to add properties to defer in its prototype
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* @param defer
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* Property of obj to defer to
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* @param prop
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* Property name to defer (or an array of property names)
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*/
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deferGetSet: function Utils_deferGetSet(obj, defer, prop) {
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if (Array.isArray(prop))
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return prop.map(function(prop) Utils.deferGetSet(obj, defer, prop));
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let prot = obj.prototype;
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// Create a getter if it doesn't exist yet
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if (!prot.__lookupGetter__(prop)) {
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prot.__defineGetter__(prop, function () {
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return this[defer][prop];
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});
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}
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// Create a setter if it doesn't exist yet
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if (!prot.__lookupSetter__(prop)) {
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prot.__defineSetter__(prop, function (val) {
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this[defer][prop] = val;
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});
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}
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},
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lazyStrings: function Weave_lazyStrings(name) {
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let bundle = "chrome://weave/locale/services/" + name + ".properties";
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return function() new StringBundle(bundle);
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},
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deepEquals: function eq(a, b) {
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// If they're triple equals, then it must be equals!
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if (a === b)
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return true;
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// If they weren't equal, they must be objects to be different
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if (typeof a != "object" || typeof b != "object")
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return false;
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// But null objects won't have properties to compare
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if (a === null || b === null)
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return false;
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// Make sure all of a's keys have a matching value in b
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for (let k in a)
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if (!eq(a[k], b[k]))
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return false;
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// Do the same for b's keys but skip those that we already checked
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for (let k in b)
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if (!(k in a) && !eq(a[k], b[k]))
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return false;
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return true;
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},
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// Generator and discriminator for HMAC exceptions.
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// Split these out in case we want to make them richer in future, and to
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// avoid inevitable confusion if the message changes.
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throwHMACMismatch: function throwHMACMismatch(shouldBe, is) {
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throw "Record SHA256 HMAC mismatch: should be " + shouldBe + ", is " + is;
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},
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isHMACMismatch: function isHMACMismatch(ex) {
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const hmacFail = "Record SHA256 HMAC mismatch: ";
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return ex && ex.indexOf && (ex.indexOf(hmacFail) == 0);
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},
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/**
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* Turn RFC 4648 base32 into our own user-friendly version.
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* ABCDEFGHIJKLMNOPQRSTUVWXYZ234567
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* becomes
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* abcdefghijk8mn9pqrstuvwxyz234567
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*/
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base32ToFriendly: function base32ToFriendly(input) {
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return input.toLowerCase()
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.replace("l", '8', "g")
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.replace("o", '9', "g");
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},
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base32FromFriendly: function base32FromFriendly(input) {
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return input.toUpperCase()
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.replace("8", 'L', "g")
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.replace("9", 'O', "g");
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},
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/**
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* Key manipulation.
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*/
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// Return an octet string in friendly base32 *with no trailing =*.
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encodeKeyBase32: function encodeKeyBase32(keyData) {
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return Utils.base32ToFriendly(
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Utils.encodeBase32(keyData))
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.slice(0, SYNC_KEY_ENCODED_LENGTH);
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},
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decodeKeyBase32: function decodeKeyBase32(encoded) {
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return Utils.decodeBase32(
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Utils.base32FromFriendly(
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Utils.normalizePassphrase(encoded)))
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.slice(0, SYNC_KEY_DECODED_LENGTH);
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},
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base64Key: function base64Key(keyData) {
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return btoa(keyData);
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},
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/**
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* N.B., salt should be base64 encoded, even though we have to decode
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* it later!
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*/
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derivePresentableKeyFromPassphrase : function derivePresentableKeyFromPassphrase(passphrase, salt, keyLength, forceJS) {
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let k = CryptoUtils.deriveKeyFromPassphrase(passphrase, salt, keyLength,
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forceJS);
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return Utils.encodeKeyBase32(k);
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},
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/**
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* N.B., salt should be base64 encoded, even though we have to decode
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* it later!
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*/
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deriveEncodedKeyFromPassphrase : function deriveEncodedKeyFromPassphrase(passphrase, salt, keyLength, forceJS) {
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let k = CryptoUtils.deriveKeyFromPassphrase(passphrase, salt, keyLength,
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forceJS);
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return Utils.base64Key(k);
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},
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/**
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* Take a base64-encoded 128-bit AES key, returning it as five groups of five
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* uppercase alphanumeric characters, separated by hyphens.
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* A.K.A. base64-to-base32 encoding.
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*/
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presentEncodedKeyAsSyncKey : function presentEncodedKeyAsSyncKey(encodedKey) {
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return Utils.encodeKeyBase32(atob(encodedKey));
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},
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/**
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* Load a JSON file from disk in the profile directory.
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*
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* @param filePath
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* JSON file path load from profile. Loaded file will be
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* <profile>/<filePath>.json. i.e. Do not specify the ".json"
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* extension.
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* @param that
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* Object to use for logging and "this" for callback.
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* @param callback
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* Function to process json object as its first argument. If the file
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* could not be loaded, the first argument will be undefined.
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*/
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jsonLoad: function jsonLoad(filePath, that, callback) {
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let path = "weave/" + filePath + ".json";
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if (that._log) {
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that._log.trace("Loading json from disk: " + filePath);
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}
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let file = FileUtils.getFile("ProfD", path.split("/"), true);
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if (!file.exists()) {
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callback.call(that);
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return;
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}
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let channel = NetUtil.newChannel(file);
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channel.contentType = "application/json";
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NetUtil.asyncFetch(channel, function (is, result) {
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if (!Components.isSuccessCode(result)) {
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callback.call(that);
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return;
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}
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let string = NetUtil.readInputStreamToString(is, is.available());
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is.close();
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let json;
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try {
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json = JSON.parse(string);
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} catch (ex) {
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if (that._log) {
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that._log.debug("Failed to load json: " +
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CommonUtils.exceptionStr(ex));
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}
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}
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callback.call(that, json);
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});
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},
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/**
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* Save a json-able object to disk in the profile directory.
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*
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* @param filePath
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* JSON file path save to <filePath>.json
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* @param that
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* Object to use for logging and "this" for callback
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* @param obj
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* Function to provide json-able object to save. If this isn't a
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* function, it'll be used as the object to make a json string.
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* @param callback
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* Function called when the write has been performed. Optional.
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* The first argument will be a Components.results error
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* constant on error or null if no error was encountered (and
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* the file saved successfully).
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*/
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jsonSave: function jsonSave(filePath, that, obj, callback) {
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let path = "weave/" + filePath + ".json";
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if (that._log) {
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that._log.trace("Saving json to disk: " + path);
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}
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let file = FileUtils.getFile("ProfD", path.split("/"), true);
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let json = typeof obj == "function" ? obj.call(that) : obj;
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let out = JSON.stringify(json);
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let fos = FileUtils.openSafeFileOutputStream(file);
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let is = this._utf8Converter.convertToInputStream(out);
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NetUtil.asyncCopy(is, fos, function (result) {
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if (typeof callback == "function") {
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let error = (result == Cr.NS_OK) ? null : result;
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callback.call(that, error);
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}
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});
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},
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getIcon: function(iconUri, defaultIcon) {
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try {
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let iconURI = Utils.makeURI(iconUri);
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return PlacesUtils.favicons.getFaviconLinkForIcon(iconURI).spec;
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}
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catch(ex) {}
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// Just give the provided default icon or the system's default
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return defaultIcon || PlacesUtils.favicons.defaultFavicon.spec;
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},
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getErrorString: function Utils_getErrorString(error, args) {
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try {
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return Str.errors.get(error, args || null);
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} catch (e) {}
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// basically returns "Unknown Error"
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return Str.errors.get("error.reason.unknown");
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},
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/**
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* Generate 26 characters.
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*/
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generatePassphrase: function generatePassphrase() {
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// Note that this is a different base32 alphabet to the one we use for
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// other tasks. It's lowercase, uses different letters, and needs to be
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// decoded with decodeKeyBase32, not just decodeBase32.
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return Utils.encodeKeyBase32(CryptoUtils.generateRandomBytes(16));
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},
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/**
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* The following are the methods supported for UI use:
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*
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* * isPassphrase:
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* determines whether a string is either a normalized or presentable
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* passphrase.
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* * hyphenatePassphrase:
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* present a normalized passphrase for display. This might actually
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* perform work beyond just hyphenation; sorry.
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* * hyphenatePartialPassphrase:
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* present a fragment of a normalized passphrase for display.
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* * normalizePassphrase:
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* take a presentable passphrase and reduce it to a normalized
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* representation for storage. normalizePassphrase can safely be called
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* on normalized input.
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* * normalizeAccount:
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* take user input for account/username, cleaning up appropriately.
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*/
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isPassphrase: function(s) {
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if (s) {
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return /^[abcdefghijkmnpqrstuvwxyz23456789]{26}$/.test(Utils.normalizePassphrase(s));
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}
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return false;
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},
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/**
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* Hyphenate a passphrase (26 characters) into groups.
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* abbbbccccddddeeeeffffggggh
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* =>
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* a-bbbbc-cccdd-ddeee-effff-ggggh
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*/
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hyphenatePassphrase: function hyphenatePassphrase(passphrase) {
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// For now, these are the same.
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return Utils.hyphenatePartialPassphrase(passphrase, true);
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},
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hyphenatePartialPassphrase: function hyphenatePartialPassphrase(passphrase, omitTrailingDash) {
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if (!passphrase)
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return null;
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// Get the raw data input. Just base32.
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let data = passphrase.toLowerCase().replace(/[^abcdefghijkmnpqrstuvwxyz23456789]/g, "");
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// This is the neatest way to do this.
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if ((data.length == 1) && !omitTrailingDash)
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return data + "-";
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// Hyphenate it.
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let y = data.substr(0,1);
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let z = data.substr(1).replace(/(.{1,5})/g, "-$1");
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// Correct length? We're done.
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if ((z.length == 30) || omitTrailingDash)
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return y + z;
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// Add a trailing dash if appropriate.
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return (y + z.replace(/([^-]{5})$/, "$1-")).substr(0, SYNC_KEY_HYPHENATED_LENGTH);
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},
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normalizePassphrase: function normalizePassphrase(pp) {
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// Short var name... have you seen the lines below?!
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// Allow leading and trailing whitespace.
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pp = pp.trim().toLowerCase();
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// 20-char sync key.
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if (pp.length == 23 &&
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[5, 11, 17].every(function(i) pp[i] == '-')) {
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return pp.slice(0, 5) + pp.slice(6, 11)
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+ pp.slice(12, 17) + pp.slice(18, 23);
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}
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// "Modern" 26-char key.
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if (pp.length == 31 &&
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|
[1, 7, 13, 19, 25].every(function(i) pp[i] == '-')) {
|
|
|
|
return pp.slice(0, 1) + pp.slice(2, 7)
|
|
+ pp.slice(8, 13) + pp.slice(14, 19)
|
|
+ pp.slice(20, 25) + pp.slice(26, 31);
|
|
}
|
|
|
|
// Something else -- just return.
|
|
return pp;
|
|
},
|
|
|
|
normalizeAccount: function normalizeAccount(acc) {
|
|
return acc.trim();
|
|
},
|
|
|
|
/**
|
|
* Create an array like the first but without elements of the second. Reuse
|
|
* arrays if possible.
|
|
*/
|
|
arraySub: function arraySub(minuend, subtrahend) {
|
|
if (!minuend.length || !subtrahend.length)
|
|
return minuend;
|
|
return minuend.filter(function(i) subtrahend.indexOf(i) == -1);
|
|
},
|
|
|
|
/**
|
|
* Build the union of two arrays. Reuse arrays if possible.
|
|
*/
|
|
arrayUnion: function arrayUnion(foo, bar) {
|
|
if (!foo.length)
|
|
return bar;
|
|
if (!bar.length)
|
|
return foo;
|
|
return foo.concat(Utils.arraySub(bar, foo));
|
|
},
|
|
|
|
bind2: function Async_bind2(object, method) {
|
|
return function innerBind() { return method.apply(object, arguments); };
|
|
},
|
|
|
|
mpLocked: function mpLocked() {
|
|
let modules = Cc["@mozilla.org/security/pkcs11moduledb;1"]
|
|
.getService(Ci.nsIPKCS11ModuleDB);
|
|
let sdrSlot = modules.findSlotByName("");
|
|
let status = sdrSlot.status;
|
|
let slots = Ci.nsIPKCS11Slot;
|
|
|
|
if (status == slots.SLOT_READY || status == slots.SLOT_LOGGED_IN
|
|
|| status == slots.SLOT_UNINITIALIZED)
|
|
return false;
|
|
|
|
if (status == slots.SLOT_NOT_LOGGED_IN)
|
|
return true;
|
|
|
|
// something wacky happened, pretend MP is locked
|
|
return true;
|
|
},
|
|
|
|
// If Master Password is enabled and locked, present a dialog to unlock it.
|
|
// Return whether the system is unlocked.
|
|
ensureMPUnlocked: function ensureMPUnlocked() {
|
|
if (!Utils.mpLocked()) {
|
|
return true;
|
|
}
|
|
let sdr = Cc["@mozilla.org/security/sdr;1"]
|
|
.getService(Ci.nsISecretDecoderRing);
|
|
try {
|
|
sdr.encryptString("bacon");
|
|
return true;
|
|
} catch(e) {}
|
|
return false;
|
|
},
|
|
|
|
/**
|
|
* Return a value for a backoff interval. Maximum is eight hours, unless
|
|
* Status.backoffInterval is higher.
|
|
*
|
|
*/
|
|
calculateBackoff: function calculateBackoff(attempts, baseInterval,
|
|
statusInterval) {
|
|
let backoffInterval = attempts *
|
|
(Math.floor(Math.random() * baseInterval) +
|
|
baseInterval);
|
|
return Math.max(Math.min(backoffInterval, MAXIMUM_BACKOFF_INTERVAL),
|
|
statusInterval);
|
|
},
|
|
};
|
|
|
|
XPCOMUtils.defineLazyGetter(Utils, "_utf8Converter", function() {
|
|
let converter = Cc["@mozilla.org/intl/scriptableunicodeconverter"]
|
|
.createInstance(Ci.nsIScriptableUnicodeConverter);
|
|
converter.charset = "UTF-8";
|
|
return converter;
|
|
});
|
|
|
|
/*
|
|
* Commonly-used services
|
|
*/
|
|
this.Svc = {};
|
|
Svc.Prefs = new Preferences(PREFS_BRANCH);
|
|
Svc.DefaultPrefs = new Preferences({branch: PREFS_BRANCH, defaultBranch: true});
|
|
Svc.Obs = Observers;
|
|
|
|
let _sessionCID = Services.appinfo.ID == SEAMONKEY_ID ?
|
|
"@mozilla.org/suite/sessionstore;1" :
|
|
"@mozilla.org/browser/sessionstore;1";
|
|
|
|
[
|
|
["Idle", "@mozilla.org/widget/idleservice;1", "nsIIdleService"],
|
|
["Session", _sessionCID, "nsISessionStore"]
|
|
].forEach(function([name, contract, iface]) {
|
|
XPCOMUtils.defineLazyServiceGetter(Svc, name, contract, iface);
|
|
});
|
|
|
|
XPCOMUtils.defineLazyModuleGetter(Svc, "FormHistory", "resource://gre/modules/FormHistory.jsm");
|
|
|
|
Svc.__defineGetter__("Crypto", function() {
|
|
let cryptoSvc;
|
|
let ns = {};
|
|
Cu.import("resource://services-crypto/WeaveCrypto.js", ns);
|
|
cryptoSvc = new ns.WeaveCrypto();
|
|
delete Svc.Crypto;
|
|
return Svc.Crypto = cryptoSvc;
|
|
});
|
|
|
|
this.Str = {};
|
|
["errors", "sync"].forEach(function(lazy) {
|
|
XPCOMUtils.defineLazyGetter(Str, lazy, Utils.lazyStrings(lazy));
|
|
});
|
|
|
|
Svc.Obs.add("xpcom-shutdown", function () {
|
|
for (let name in Svc)
|
|
delete Svc[name];
|
|
});
|