mirror of
https://github.com/moparisthebest/mail
synced 2024-11-14 05:05:10 -05:00
874 lines
28 KiB
JavaScript
874 lines
28 KiB
JavaScript
define(function(require) {
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'use strict';
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var util = require('cryptoLib/util'),
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_ = require('underscore'),
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str = require('js/app-config').string,
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config = require('js/app-config').config;
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var EmailDAO = function(keychain, imapClient, smtpClient, crypto, devicestorage) {
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var self = this;
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self._keychain = keychain;
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self._imapClient = imapClient;
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self._smtpClient = smtpClient;
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self._crypto = crypto;
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self._devicestorage = devicestorage;
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// delegation-esque pattern to mitigate between node-style events and plain js
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self._imapClient.onIncomingMessage = function(message) {
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if (typeof self.onIncomingMessage === 'function') {
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self.onIncomingMessage(message);
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}
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};
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};
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//
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// External API
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//
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EmailDAO.prototype.init = function(options, callback) {
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var self = this,
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keypair;
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self._account = options.account;
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self._account.busy = false;
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// validate email address
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var emailAddress = self._account.emailAddress;
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if (!util.validateEmailAddress(emailAddress)) {
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callback({
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errMsg: 'The user email address must be specified!'
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});
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return;
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}
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// init keychain and then crypto module
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initKeychain();
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function initKeychain() {
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// init user's local database
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self._devicestorage.init(emailAddress, function() {
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// call getUserKeyPair to read/sync keypair with devicestorage/cloud
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self._keychain.getUserKeyPair(emailAddress, function(err, storedKeypair) {
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if (err) {
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callback(err);
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return;
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}
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keypair = storedKeypair;
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initFolders();
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});
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});
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}
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function initFolders() {
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self._imapLogin(function(err) {
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if (err) {
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callback(err);
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return;
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}
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self._imapListFolders(function(err, folders) {
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if (err) {
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callback(err);
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return;
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}
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self._account.folders = folders;
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callback(null, keypair);
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});
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});
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}
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};
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EmailDAO.prototype.unlock = function(options, callback) {
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var self = this;
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if (options.keypair) {
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// import existing key pair into crypto module
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self._crypto.importKeys({
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passphrase: options.passphrase,
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privateKeyArmored: options.keypair.privateKey.encryptedKey,
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publicKeyArmored: options.keypair.publicKey.publicKey
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}, callback);
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return;
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}
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// no keypair for is stored for the user... generate a new one
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self._crypto.generateKeys({
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emailAddress: self._account.emailAddress,
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keySize: self._account.asymKeySize,
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passphrase: options.passphrase
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}, function(err, generatedKeypair) {
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if (err) {
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callback(err);
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return;
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}
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handleGenerated(generatedKeypair);
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});
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function handleGenerated(generatedKeypair) {
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// import the new key pair into crypto module
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self._crypto.importKeys({
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passphrase: options.passphrase,
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privateKeyArmored: generatedKeypair.privateKeyArmored,
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publicKeyArmored: generatedKeypair.publicKeyArmored
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}, function(err) {
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if (err) {
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callback(err);
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return;
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}
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// persist newly generated keypair
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var newKeypair = {
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publicKey: {
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_id: generatedKeypair.keyId,
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userId: self._account.emailAddress,
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publicKey: generatedKeypair.publicKeyArmored
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},
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privateKey: {
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_id: generatedKeypair.keyId,
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userId: self._account.emailAddress,
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encryptedKey: generatedKeypair.privateKeyArmored
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}
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};
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self._keychain.putUserKeyPair(newKeypair, callback);
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});
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}
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};
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EmailDAO.prototype.sync = function(options, callback) {
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/*
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* Here's how delta sync works:
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* delta1: storage > memory => we deleted messages, remove from remote
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* delta2: memory > storage => we added messages, push to remote <<< not supported yet
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* delta3: memory > imap => we deleted messages directly from the remote, remove from memory and storage
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* delta4: imap > memory => we have new messages available, fetch to memory and storage
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*/
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var self = this,
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folder,
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delta1 /*, delta2 */ , delta3, delta4,
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isFolderInitialized;
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// validate options
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if (!options.folder) {
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callback({
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errMsg: 'Invalid options!'
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});
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return;
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}
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if (self._account.busy) {
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callback({
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errMsg: 'Sync aborted: Previous sync still in progress'
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});
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return;
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}
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self._account.busy = true;
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folder = _.findWhere(self._account.folders, {
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path: options.folder
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});
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isFolderInitialized = !! folder.messages;
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// initial filling from local storage is an exception from the normal sync.
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// after reading from local storage, do imap sync
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if (!isFolderInitialized) {
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initFolderMessages();
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return;
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}
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doLocalDelta();
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function initFolderMessages() {
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folder.messages = [];
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self._localListMessages({
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folder: folder.path
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}, function(err, messages) {
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if (err) {
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self._account.busy = false;
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callback(err);
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return;
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}
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if (_.isEmpty(messages)) {
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// if there's nothing here, we're good
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callback();
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doImapDelta();
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return;
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}
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var after = _.after(messages.length, function() {
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callback();
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doImapDelta();
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});
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messages.forEach(function(message) {
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handleMessage(message, function(err, cleartextMessage) {
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if (err) {
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self._account.busy = false;
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callback(err);
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return;
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}
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folder.messages.push(cleartextMessage);
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after();
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});
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});
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});
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}
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function doLocalDelta() {
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self._localListMessages({
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folder: folder.path
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}, function(err, messages) {
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if (err) {
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self._account.busy = false;
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callback(err);
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return;
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}
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/*
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* delta1: storage > memory => we deleted messages, remove from remote
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* delta2: memory > storage => we added messages, push to remote
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*/
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delta1 = checkDelta(messages, folder.messages);
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// delta2 = checkDelta(folder.messages, messages); // not supported yet
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if (_.isEmpty(delta1) /* && _.isEmpty(delta2)*/ ) {
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// if there is no delta, head directly to imap sync
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callback();
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doImapDelta();
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return;
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}
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doDelta1();
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function doDelta1() {
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var after = _.after(delta1.length, function() {
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// doDelta2(); when it is implemented
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callback();
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doImapDelta();
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});
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delta1.forEach(function(message) {
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var deleteMe = {
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folder: folder.path,
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uid: message.uid
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};
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self._imapDeleteMessage(deleteMe, function(err) {
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if (err) {
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self._account.busy = false;
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callback(err);
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return;
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}
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self._localDeleteMessage(deleteMe, function(err) {
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if (err) {
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self._account.busy = false;
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callback(err);
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return;
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}
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after();
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});
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});
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});
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}
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});
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}
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function doImapDelta() {
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self._imapListMessages({
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folder: folder.path
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}, function(err, headers) {
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if (err) {
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self._account.busy = false;
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callback(err);
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return;
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}
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// ignore non-whitelisted mails
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var nonWhitelisted = _.filter(headers, function(header) {
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return header.subject.indexOf(str.subjectPrefix) === -1;
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});
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nonWhitelisted.forEach(function(i) {
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headers.splice(headers.indexOf(i), 1);
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});
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/*
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* delta3: memory > imap => we deleted messages directly from the remote, remove from memory and storage
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* delta4: imap > memory => we have new messages available, fetch to memory and storage
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*/
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delta3 = checkDelta(folder.messages, headers);
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delta4 = checkDelta(headers, folder.messages);
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if (_.isEmpty(delta3) && _.isEmpty(delta4)) {
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// if there is no delta, we're done
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self._account.busy = false;
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callback();
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return;
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}
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doDelta3();
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// we deleted messages directly from the remote, remove from memory and storage
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function doDelta3() {
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if (_.isEmpty(delta3)) {
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doDelta4();
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return;
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}
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var after = _.after(delta3.length, function() {
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// we're done with delta 3, so let's continue
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doDelta4();
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});
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delta3.forEach(function(header) {
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// remove delta3 from memory
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var idx = folder.messages.indexOf(header);
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folder.messages.splice(idx, 1);
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// remove delta3 from local storage
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self._localDeleteMessage({
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folder: folder.path,
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uid: header.uid
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}, function(err) {
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if (err) {
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self._account.busy = false;
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callback(err);
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return;
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}
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after();
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});
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});
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}
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// we have new messages available, fetch to memory and storage
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// (downstream sync)
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function doDelta4() {
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// no delta, we're done here
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if (_.isEmpty(delta4)) {
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self._account.busy = false;
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callback();
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}
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var after = _.after(delta4.length, function() {
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self._account.busy = false;
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callback();
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});
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delta4.forEach(function(header) {
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// get the whole message
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self._imapGetMessage({
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folder: folder.path,
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uid: header.uid
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}, function(err, message) {
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if (err) {
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self._account.busy = false;
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callback(err);
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return;
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}
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if (isVerificationMail(message)) {
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verify(message, function(err) {
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if (err) {
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self._account.busy = false;
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callback(err);
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return;
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}
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after();
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});
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return;
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}
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// add the encrypted message to the local storage
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self._localStoreMessages({
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folder: folder.path,
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emails: [message]
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}, function(err) {
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if (err) {
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self._account.busy = false;
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callback(err);
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return;
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}
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// decrypt and add to folder in memory
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handleMessage(message, function(err, cleartextMessage) {
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if (err) {
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self._account.busy = false;
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callback(err);
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return;
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}
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folder.messages.push(cleartextMessage);
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after();
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});
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});
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});
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});
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}
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});
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}
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/*
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* Checks which messages are included in a, but not in b
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*/
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function checkDelta(a, b) {
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var i, msg, exists,
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delta = [];
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// find the delta
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for (i = a.length - 1; i >= 0; i--) {
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msg = a[i];
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exists = _.findWhere(b, {
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uid: msg.uid
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});
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if (!exists) {
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delta.push(msg);
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}
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}
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return delta;
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}
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function isVerificationMail(email) {
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return email.subject === str.subjectPrefix + str.verificationSubject;
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}
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function verify(email, localCallback) {
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var uuid, index, verifyUrlPrefix = config.cloudUrl + config.verificationUrl;
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if (!email.unread) {
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// don't bother if the email was already marked as read
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localCallback();
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return;
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}
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index = email.body.indexOf(verifyUrlPrefix);
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if (index === -1) {
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// there's no url in the email, so forget about that.
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localCallback();
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return;
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}
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uuid = email.body.substr(index + verifyUrlPrefix.length, config.verificationUuidLength);
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self._keychain.verifyPublicKey(uuid, function(err) {
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if (err) {
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localCallback({
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errMsg: 'Verifying your public key failed: ' + err.errMsg
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});
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return;
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}
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// public key has been verified, mark the message as read, delete it, and ignore it in the future
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self.markRead({
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folder: options.folder,
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uid: email.uid
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}, function(err) {
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if (err) {
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localCallback(err);
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return;
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}
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self._imapDeleteMessage({
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folder: options.folder,
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uid: email.uid
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}, localCallback);
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});
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});
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}
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function handleMessage(message, localCallback) {
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if (containsArmoredCiphertext(message)) {
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decrypt(message, localCallback);
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return;
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}
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// cleartext mail
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localCallback(null, message);
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}
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function containsArmoredCiphertext(email) {
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return typeof email.body === 'string' && email.body.indexOf(str.cryptPrefix) !== -1 && email.body.indexOf(str.cryptSuffix) !== -1;
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}
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function decrypt(email, localCallback) {
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var sender;
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extractArmoredContent(email);
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// fetch public key required to verify signatures
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sender = email.from[0].address;
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self._keychain.getReceiverPublicKey(sender, function(err, senderPubkey) {
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if (err) {
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localCallback(err);
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return;
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}
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if (!senderPubkey) {
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// this should only happen if a mail from another channel is in the inbox
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setBodyAndContinue('Public key for sender not found!');
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return;
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}
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// decrypt and verfiy signatures
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self._crypto.decrypt(email.body, senderPubkey.publicKey, function(err, decrypted) {
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if (err) {
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decrypted = err.errMsg;
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}
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setBodyAndContinue(decrypted);
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});
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});
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function extractArmoredContent(email) {
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var start = email.body.indexOf(str.cryptPrefix),
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end = email.body.indexOf(str.cryptSuffix) + str.cryptSuffix.length;
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// parse email body for encrypted message block
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email.body = email.body.substring(start, end);
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}
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function setBodyAndContinue(text) {
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email.body = text;
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localCallback(null, email);
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}
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}
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};
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EmailDAO.prototype.markRead = function(options, callback) {
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this._imapClient.updateFlags({
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path: options.folder,
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uid: options.uid,
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unread: false
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}, callback);
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};
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EmailDAO.prototype.markAnswered = function(options, callback) {
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this._imapClient.updateFlags({
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path: options.folder,
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uid: options.uid,
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answered: true
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}, callback);
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};
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EmailDAO.prototype.move = function(options, callback) {
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this._imapClient.moveMessage({
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path: options.folder,
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uid: options.uid,
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destination: options.destination
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}, callback);
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};
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EmailDAO.prototype.sendEncrypted = function(options, callback) {
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var self = this,
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email = options.email;
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// validate the email input
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if (!email.to || !email.from || !email.to[0].address || !email.from[0].address) {
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callback({
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errMsg: 'Invalid email object!'
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});
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return;
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}
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// validate email addresses
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for (var i = email.to.length - 1; i >= 0; i--) {
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if (!util.validateEmailAddress(email.to[i].address)) {
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callback({
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errMsg: 'Invalid recipient: ' + email.to[i].address
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});
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return;
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}
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}
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if (!util.validateEmailAddress(email.from[0].address)) {
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callback({
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errMsg: 'Invalid sender: ' + email.from
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});
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return;
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}
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// only support single recipient for e-2-e encryption
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// check if receiver has a public key
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self._keychain.getReceiverPublicKey(email.to[0].address, function(err, receiverPubkey) {
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if (err) {
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callback(err);
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return;
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}
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// validate public key
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if (!receiverPubkey) {
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callback({
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errMsg: 'User has no public key yet!'
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});
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return;
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}
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// public key found... encrypt and send
|
|
self._encrypt({
|
|
email: email,
|
|
keys: [receiverPubkey.publicKey]
|
|
}, function(err, email) {
|
|
if (err) {
|
|
callback(err);
|
|
return;
|
|
}
|
|
|
|
self._smtpClient.send(email, callback);
|
|
});
|
|
});
|
|
};
|
|
|
|
EmailDAO.prototype.sendPlaintext = function(options, callback) {
|
|
this._smtpClient.send(options.email, callback);
|
|
};
|
|
|
|
//
|
|
// Internal API
|
|
//
|
|
|
|
// Encryption API
|
|
|
|
EmailDAO.prototype._encrypt = function(options, callback) {
|
|
var self = this,
|
|
pt = options.email.body;
|
|
|
|
options.keys = options.keys || [];
|
|
|
|
// get own public key so send message can be read
|
|
self._crypto.exportKeys(function(err, ownKeys) {
|
|
if (err) {
|
|
callback(err);
|
|
return;
|
|
}
|
|
|
|
// add own public key to receiver list
|
|
options.keys.push(ownKeys.publicKeyArmored);
|
|
// encrypt the email
|
|
self._crypto.encrypt(pt, options.keys, function(err, ct) {
|
|
if (err) {
|
|
callback(err);
|
|
return;
|
|
}
|
|
|
|
// bundle encrypted email together for sending
|
|
frameEncryptedMessage(options.email, ct);
|
|
callback(null, options.email);
|
|
});
|
|
});
|
|
|
|
function frameEncryptedMessage(email, ct) {
|
|
var greeting,
|
|
message = str.message + '\n\n\n',
|
|
signature = '\n\n' + str.signature + '\n\n';
|
|
|
|
// get first name of recipient
|
|
greeting = 'Hi ' + (email.to[0].name || email.to[0].address).split('@')[0].split('.')[0].split(' ')[0] + ',\n\n';
|
|
|
|
// build encrypted text body
|
|
email.body = greeting + message + ct + signature;
|
|
email.subject = email.subject;
|
|
}
|
|
};
|
|
|
|
// Local Storage API
|
|
|
|
EmailDAO.prototype._localListMessages = function(options, callback) {
|
|
var dbType = 'email_' + options.folder;
|
|
this._devicestorage.listItems(dbType, 0, null, callback);
|
|
};
|
|
|
|
EmailDAO.prototype._localStoreMessages = function(options, callback) {
|
|
var dbType = 'email_' + options.folder;
|
|
this._devicestorage.storeList(options.emails, dbType, callback);
|
|
};
|
|
|
|
EmailDAO.prototype._localDeleteMessage = function(options, callback) {
|
|
if (!options.folder || !options.uid) {
|
|
callback({
|
|
errMsg: 'Invalid options!'
|
|
});
|
|
return;
|
|
}
|
|
var dbType = 'email_' + options.folder + '_' + options.uid;
|
|
this._devicestorage.removeList(dbType, callback);
|
|
};
|
|
|
|
|
|
// IMAP API
|
|
|
|
/**
|
|
* Login the imap client
|
|
*/
|
|
EmailDAO.prototype._imapLogin = function(callback) {
|
|
// login IMAP client if existent
|
|
this._imapClient.login(callback);
|
|
};
|
|
|
|
/**
|
|
* Cleanup by logging the user off.
|
|
*/
|
|
EmailDAO.prototype._imapLogout = function(callback) {
|
|
this._imapClient.logout(callback);
|
|
};
|
|
|
|
/**
|
|
* List messages from an imap folder. This will not yet fetch the email body.
|
|
* @param {String} options.folderName The name of the imap folder.
|
|
*/
|
|
EmailDAO.prototype._imapListMessages = function(options, callback) {
|
|
this._imapClient.listMessages({
|
|
path: options.folder,
|
|
offset: 0,
|
|
length: 100
|
|
}, callback);
|
|
};
|
|
|
|
EmailDAO.prototype._imapDeleteMessage = function(options, callback) {
|
|
this._imapClient.deleteMessage({
|
|
path: options.folder,
|
|
uid: options.uid
|
|
}, callback);
|
|
};
|
|
|
|
/**
|
|
* Get an email messsage including the email body from imap
|
|
* @param {String} options.messageId The
|
|
*/
|
|
EmailDAO.prototype._imapGetMessage = function(options, callback) {
|
|
this._imapClient.getMessagePreview({
|
|
path: options.folder,
|
|
uid: options.uid
|
|
}, callback);
|
|
};
|
|
|
|
/**
|
|
* List the folders in the user's IMAP mailbox.
|
|
*/
|
|
EmailDAO.prototype._imapListFolders = function(callback) {
|
|
var self = this,
|
|
dbType = 'folders';
|
|
|
|
// check local cache
|
|
self._devicestorage.listItems(dbType, 0, null, function(err, stored) {
|
|
if (err) {
|
|
callback(err);
|
|
return;
|
|
}
|
|
|
|
if (!stored || stored.length < 1) {
|
|
// no folders cached... fetch from server
|
|
fetchFromServer();
|
|
return;
|
|
}
|
|
|
|
callback(null, stored[0]);
|
|
});
|
|
|
|
function fetchFromServer() {
|
|
var folders;
|
|
|
|
// fetch list from imap server
|
|
self._imapClient.listWellKnownFolders(function(err, wellKnownFolders) {
|
|
if (err) {
|
|
callback(err);
|
|
return;
|
|
}
|
|
|
|
folders = [
|
|
wellKnownFolders.inbox,
|
|
wellKnownFolders.sent, {
|
|
type: 'Outbox',
|
|
path: 'OUTBOX'
|
|
},
|
|
wellKnownFolders.drafts,
|
|
wellKnownFolders.trash
|
|
];
|
|
|
|
// cache locally
|
|
// persist encrypted list in device storage
|
|
self._devicestorage.storeList([folders], dbType, function(err) {
|
|
if (err) {
|
|
callback(err);
|
|
return;
|
|
}
|
|
|
|
callback(null, folders);
|
|
});
|
|
});
|
|
}
|
|
};
|
|
|
|
// to be removed and solved with IMAP!
|
|
EmailDAO.prototype.store = function(email, callback) {
|
|
var self = this,
|
|
dbType = 'email_OUTBOX';
|
|
|
|
email.id = util.UUID();
|
|
|
|
// encrypt
|
|
self._encrypt({
|
|
email: email
|
|
}, function(err, email) {
|
|
if (err) {
|
|
callback(err);
|
|
return;
|
|
}
|
|
|
|
// store to local storage
|
|
self._devicestorage.storeList([email], dbType, callback);
|
|
});
|
|
};
|
|
|
|
// to be removed and solved with IMAP!
|
|
EmailDAO.prototype.list = function(callback) {
|
|
var self = this,
|
|
dbType = 'email_OUTBOX';
|
|
|
|
self._devicestorage.listItems(dbType, 0, null, function(err, mails) {
|
|
if (err) {
|
|
callback(err);
|
|
return;
|
|
}
|
|
|
|
if (mails.length === 0) {
|
|
callback(null, []);
|
|
return;
|
|
}
|
|
|
|
self._crypto.exportKeys(function(err, ownKeys) {
|
|
if (err) {
|
|
callback(err);
|
|
return;
|
|
}
|
|
|
|
var after = _.after(mails.length, function() {
|
|
callback(null, mails);
|
|
});
|
|
|
|
mails.forEach(function(mail) {
|
|
mail.body = str.cryptPrefix + mail.body.split(str.cryptPrefix)[1].split(str.cryptSuffix)[0] + str.cryptSuffix;
|
|
self._crypto.decrypt(mail.body, ownKeys.publicKeyArmored, function(err, decrypted) {
|
|
mail.body = err ? err.errMsg : decrypted;
|
|
after();
|
|
});
|
|
});
|
|
|
|
});
|
|
});
|
|
};
|
|
|
|
return EmailDAO;
|
|
}); |