cryptpad/www/common/common-messenger.js

905 lines
32 KiB
JavaScript
Raw Blame History

This file contains invisible Unicode characters

This file contains invisible Unicode characters that are indistinguishable to humans but may be processed differently by a computer. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

define([
'/bower_components/chainpad-crypto/crypto.js',
'/common/curve.js',
'/common/common-hash.js',
'/common/common-util.js',
'/common/common-realtime.js',
'/common/common-constants.js',
'/bower_components/nthen/index.js',
], function (Crypto, Curve, Hash, Util, Realtime, Constants, nThen) {
'use strict';
var Msg = {
inputs: [],
};
var Types = {
message: 'MSG',
update: 'UPDATE',
unfriend: 'UNFRIEND',
mapId: 'MAP_ID',
mapIdAck: 'MAP_ID_ACK'
};
var clone = function (o) {
return JSON.parse(JSON.stringify(o));
};
// TODO
// - mute a channel (hide notifications or don't open it?)
var createData = Msg.createData = function (proxy, hash) {
return {
channel: hash || Hash.createChannelId(),
displayName: proxy[Constants.displayNameKey],
profile: proxy.profile && proxy.profile.view,
edPublic: proxy.edPublic,
curvePublic: proxy.curvePublic,
avatar: proxy.profile && proxy.profile.avatar
};
};
var getFriend = function (proxy, pubkey) {
if (pubkey === proxy.curvePublic) {
var data = createData(proxy);
delete data.channel;
return data;
}
return proxy.friends ? proxy.friends[pubkey] : undefined;
};
var getFriendList = Msg.getFriendList = function (proxy) {
if (!proxy.friends) { proxy.friends = {}; }
return proxy.friends;
};
var msgAlreadyKnown = function (channel, sig) {
return channel.messages.some(function (message) {
return message[0] === sig;
});
};
Msg.messenger = function (store) {
var messenger = {
handlers: {
message: [],
join: [],
leave: [],
update: [],
friend: [],
unfriend: [],
event: []
},
range_requests: {},
};
var eachHandler = function (type, g) {
messenger.handlers[type].forEach(g);
};
messenger.on = function (type, f) {
var stack = messenger.handlers[type];
if (!Array.isArray(stack)) {
return void console.error('unsupported message type');
}
if (typeof(f) !== 'function') {
return void console.error('expected function');
}
stack.push(f);
};
var channels = messenger.channels = {};
var joining = {};
// declare common variables
var network = store.network;
var proxy = store.proxy;
var realtime = store.realtime;
Msg.hk = network.historyKeeper;
var friends = getFriendList(proxy);
var getChannel = function (chanId) {
return channels[chanId];
};
var getFriendFromChannel = function (id) {
var friend;
for (var k in friends) {
if (friends[k].channel === id) {
friend = friends[k];
break;
}
}
return friend;
};
var initRangeRequest = function (txid, chanId, sig, cb) {
messenger.range_requests[txid] = {
messages: [],
cb: cb,
chanId: chanId,
sig: sig,
};
};
var getRangeRequest = function (txid) {
return messenger.range_requests[txid];
};
var deleteRangeRequest = function (txid) {
delete messenger.range_requests[txid];
};
messenger.getMoreHistory = function (chanId, hash, count, cb) {
if (typeof(cb) !== 'function') { return; }
if (typeof(hash) !== 'string') {
// Channel is empty!
return void cb(void 0, []);
}
var chan = getChannel(chanId);
if (typeof(chan) === 'undefined') {
console.error("chan is undefined. we're going to have a problem here");
return;
}
var txid = Util.uid();
initRangeRequest(txid, chanId, hash, cb);
var msg = [ 'GET_HISTORY_RANGE', chan.id, {
from: hash,
count: count,
txid: txid,
}
];
network.sendto(network.historyKeeper, JSON.stringify(msg)).then(function () {
}, function (err) {
throw new Error(err);
});
};
/*var getCurveForChannel = function (id) {
var channel = channels[id];
if (!channel) { return; }
return channel.curve;
};*/
/*messenger.getChannelHead = function (id, cb) {
var channel = getChannel(id);
if (channel.isFriendChat) {
var friend;
for (var k in friends) {
if (friends[k].channel === id) {
friend = friends[k];
break;
}
}
if (!friend) { return void cb('NO_SUCH_FRIEND'); }
cb(void 0, friend.lastKnownHash);
} else {
// TODO room
cb('NOT_IMPLEMENTED');
}
};*/
messenger.setChannelHead = function (id, hash, cb) {
var channel = getChannel(id);
if (channel.isFriendChat) {
var friend = getFriendFromChannel(id);
if (!friend) { return void cb('NO_SUCH_FRIEND'); }
friend.lastKnownHash = hash;
} else if (channel.isPadChat) {
// Nothing to do
} else {
// TODO room
return void cb('NOT_IMPLEMENTED');
}
cb();
};
// Make sure the data we have about our friends are up-to-date when we see them online
var checkFriendData = function (curve, data) {
if (curve === proxy.curvePublic) { return; }
var friend = getFriend(proxy, curve);
if (!friend) { return; }
var types = [];
Object.keys(data).forEach(function (k) {
if (friend[k] !== data[k]) {
types.push(k);
friend[k] = data[k];
}
});
eachHandler('update', function (f) {
f(clone(data), types);
});
};
// Id message allows us to map a netfluxId with a public curve key
var onIdMessage = function (msg, sender) {
var channel, parsed0;
try {
parsed0 = JSON.parse(msg);
channel = channels[parsed0.channel];
if (!channel) { return; }
if (channel.userList.indexOf(sender) === -1) { return; }
} catch (e) {
console.log(msg);
console.error(e);
// Not an ID message
return;
}
var decryptedMsg = channel.encryptor.decrypt(parsed0.msg);
if (decryptedMsg === null) {
return void console.error("Failed to decrypt message");
}
if (!decryptedMsg) {
console.error('decrypted message was falsey but not null');
return;
}
var parsed;
try {
parsed = JSON.parse(decryptedMsg);
} catch (e) {
console.error(decryptedMsg);
return;
}
if (parsed[0] !== Types.mapId && parsed[0] !== Types.mapIdAck) { return; }
// check that the responding peer's encrypted netflux id matches
// the sender field. This is to prevent replay attacks.
if (parsed[2] !== sender || !parsed[1]) { return; }
channel.mapId[sender] = parsed[1];
checkFriendData(parsed[1].curvePublic, parsed[1]);
eachHandler('join', function (f) {
f(parsed[1], channel.id);
});
if (parsed[0] !== Types.mapId) { return; } // Don't send your key if it's already an ACK
// Answer with your own key
var myData = createData(proxy);
delete myData.channel;
var rMsg = [Types.mapIdAck, myData, channel.wc.myID];
var rMsgStr = JSON.stringify(rMsg);
var cryptMsg = channel.encryptor.encrypt(rMsgStr);
var data = {
channel: channel.id,
msg: cryptMsg
};
network.sendto(sender, JSON.stringify(data));
};
var orderMessages = function (channel, new_messages /*, sig */) {
var messages = channel.messages;
// TODO improve performance, guarantee correct ordering
new_messages.reverse().forEach(function (msg) {
messages.unshift(msg);
});
};
var removeFromFriendList = function (curvePublic, cb) {
if (!proxy.friends) { return; }
var friends = proxy.friends;
delete friends[curvePublic];
Realtime.whenRealtimeSyncs(realtime, cb);
};
var pushMsg = function (channel, cryptMsg) {
var msg = channel.encryptor.decrypt(cryptMsg);
var sig = cryptMsg.slice(0, 64);
if (msgAlreadyKnown(channel, sig)) { return; }
var parsedMsg = JSON.parse(msg);
var curvePublic;
if (parsedMsg[0] === Types.message) {
// TODO validate messages here
var res = {
type: parsedMsg[0],
sig: sig,
author: parsedMsg[1],
time: parsedMsg[2],
text: parsedMsg[3],
channel: channel.id,
name: parsedMsg[4] // Display name for multi-user rooms
// this makes debugging a whole lot easier
//curve: getCurveForChannel(channel.id),
};
channel.messages.push(res);
if (!joining[channel.id]) {
// Channel is ready
eachHandler('message', function (f) {
f(res);
});
}
return true;
}
if (parsedMsg[0] === Types.update) {
checkFriendData(parsedMsg[1], parsedMsg[3]);
return;
}
if (parsedMsg[0] === Types.unfriend) {
curvePublic = parsedMsg[1];
// If this a removal from our part by in another tab, do nothing.
// The channel is already closed in the proxy.on('remove') part
if (curvePublic === proxy.curvePublic) { return; }
removeFromFriendList(curvePublic, function () {
channel.wc.leave(Types.unfriend);
delete channels[channel.id];
eachHandler('unfriend', function (f) {
f(curvePublic, false);
});
});
return;
}
};
/* Broadcast a display name, profile, or avatar change to all contacts
*/
// TODO send event...
messenger.updateMyData = function () {
var friends = getFriendList(proxy);
var mySyncData = friends.me;
var myData = createData(proxy);
if (!mySyncData || mySyncData.displayName !== myData.displayName
|| mySyncData.profile !== myData.profile
|| mySyncData.avatar !== myData.avatar) {
delete myData.channel;
Object.keys(channels).forEach(function (chan) {
var channel = channels[chan];
if (!channel) {
return void console.error('NO_SUCH_CHANNEL');
}
var msg = [Types.update, myData.curvePublic, +new Date(), myData];
var msgStr = JSON.stringify(msg);
var cryptMsg = channel.encryptor.encrypt(msgStr);
channel.wc.bcast(cryptMsg).then(function () {
// TODO send event
//channel.refresh();
}, function (err) {
console.error(err);
});
});
eachHandler('update', function (f) {
f(myData, ['displayName', 'profile', 'avatar']);
});
friends.me = myData;
}
};
var onChannelReady = function (chanId) {
var cb = joining[chanId];
if (typeof(cb) !== 'function') {
return void console.error('channel ready without callback');
}
delete joining[chanId];
return cb();
};
var onDirectMessage = function (msg, sender) {
if (sender !== Msg.hk) { return void onIdMessage(msg, sender); }
var parsed = JSON.parse(msg);
if (/HISTORY_RANGE/.test(parsed[0])) {
//console.log(parsed);
var txid = parsed[1];
var req = getRangeRequest(txid);
var type = parsed[0];
if (!req) {
return void console.error("received response to unknown request");
}
if (type === 'HISTORY_RANGE') {
req.messages.push(parsed[2]);
} else if (type === 'HISTORY_RANGE_END') {
// process all the messages (decrypt)
var channel = getChannel(req.chanId);
var decrypted = req.messages.map(function (msg) {
if (msg[2] !== 'MSG') { return; }
try {
return {
d: JSON.parse(channel.encryptor.decrypt(msg[4])),
sig: msg[4].slice(0, 64),
};
} catch (e) {
console.log('failed to decrypt');
return null;
}
}).filter(function (decrypted) {
return decrypted;
}).map(function (O) {
return {
type: O.d[0],
sig: O.sig,
author: O.d[1],
time: O.d[2],
text: O.d[3],
channel: req.chanId,
name: O.d[4]
};
});
orderMessages(channel, decrypted, req.sig);
req.cb(void 0, decrypted);
return deleteRangeRequest(txid);
} else {
console.log(parsed);
}
return;
}
if ((parsed.validateKey || parsed.owners) && parsed.channel) {
return;
}
// End of initial history
if (parsed.state && parsed.state === 1 && parsed.channel) {
if (channels[parsed.channel]) {
// parsed.channel is Ready
// channel[parsed.channel].ready();
channels[parsed.channel].ready = true;
onChannelReady(parsed.channel);
var updateTypes = channels[parsed.channel].updateOnReady;
if (updateTypes) {
//channels[parsed.channel].updateUI(updateTypes);
}
}
return;
}
// Initial history message
var chan = parsed[3];
if (!chan || !channels[chan]) { return; }
pushMsg(channels[chan], parsed[4]);
};
var onMessage = function (msg, sender, chan) {
if (!channels[chan.id]) { return; }
var isMessage = pushMsg(channels[chan.id], msg);
if (isMessage) {
if (channels[chan.id].wc.myID !== sender) {
// Don't notify for your own messages
//channels[chan.id].notify();
}
//channels[chan.id].refresh();
// TODO emit message event
}
};
// listen for messages...
network.on('message', function(msg, sender) {
onDirectMessage(msg, sender);
});
messenger.removeFriend = function (curvePublic, cb) {
if (typeof(cb) !== 'function') { throw new Error('NO_CALLBACK'); }
var data = getFriend(proxy, curvePublic);
if (!data) {
// friend is not valid
console.error('friend is not valid');
return void cb('INVALID_FRIEND');
}
var channel = channels[data.channel];
if (!channel) {
return void cb("NO_SUCH_CHANNEL");
}
if (!network.webChannels.some(function (wc) {
return wc.id === channel.id;
})) {
console.error('bad channel: ', curvePublic);
}
var msg = [Types.unfriend, proxy.curvePublic, +new Date()];
var msgStr = JSON.stringify(msg);
var cryptMsg = channel.encryptor.encrypt(msgStr);
try {
channel.wc.bcast(cryptMsg).then(function () {
removeFromFriendList(curvePublic, function () {
delete channels[channel.id];
eachHandler('unfriend', function (f) {
f(curvePublic, true);
});
cb();
});
}, function (err) {
console.error(err);
cb(err);
});
} catch (e) {
cb(e);
}
};
var getChannelMessagesSince = function (chan, data, keys) {
console.log('Fetching [%s] messages since [%s]', chan.id, data.lastKnownHash || '');
var cfg = {
validateKey: keys ? keys.validateKey : undefined,
owners: [proxy.edPublic, data.edPublic],
lastKnownHash: data.lastKnownHash
};
var msg = ['GET_HISTORY', chan.id, cfg];
network.sendto(network.historyKeeper, JSON.stringify(msg))
.then(function () {}, function (err) {
throw new Error(err);
});
};
var openChannel = function (data) {
var keys = data.keys;
var encryptor = data.encryptor || Curve.createEncryptor(keys);
network.join(data.channel).then(function (chan) {
var channel = channels[data.channel] = {
id: data.channel,
isFriendChat: data.isFriendChat,
isPadChat: data.isPadChat,
sending: false,
encryptor: encryptor,
messages: [],
wc: chan,
userList: [],
mapId: {},
};
chan.on('message', function (msg, sender) {
onMessage(msg, sender, chan);
});
var onJoining = function (peer) {
if (peer === Msg.hk) { return; }
if (channel.userList.indexOf(peer) !== -1) { return; }
channel.userList.push(peer);
// Join event will be sent once we are able to ID this peer
var myData = createData(proxy);
delete myData.channel;
var msg = [Types.mapId, myData, chan.myID];
var msgStr = JSON.stringify(msg);
var cryptMsg = channel.encryptor.encrypt(msgStr);
var data = {
channel: channel.id,
msg: cryptMsg
};
network.sendto(peer, JSON.stringify(data));
};
chan.members.forEach(function (peer) {
if (peer === Msg.hk) { return; }
if (channel.userList.indexOf(peer) !== -1) { return; }
channel.userList.push(peer);
});
chan.on('join', onJoining);
chan.on('leave', function (peer) {
var i = channel.userList.indexOf(peer);
while (i !== -1) {
channel.userList.splice(i, 1);
i = channel.userList.indexOf(peer);
}
// update status
var otherData = channel.mapId[peer];
if (!otherData) { return; }
// Make sure the leaving user is not connected with another netflux id
if (channel.userList.some(function (nId) {
return channel.mapId[nId]
&& channel.mapId[nId].curvePublic === otherData.curvePublic;
})) { return; }
// Send the notification
eachHandler('leave', function (f) {
f(otherData, channel.id);
});
});
// FIXME don't subscribe to the channel implicitly
getChannelMessagesSince(chan, data, keys);
}, function (err) {
console.error(err);
});
};
messenger.getFriendList = function (cb) {
var friends = proxy.friends;
if (!friends) { return void cb(void 0, []); }
cb(void 0, Object.keys(proxy.friends).filter(function (k) {
return k !== 'me';
}));
};
/*messenger.openFriendChannel = function (curvePublic, cb) {
if (typeof(curvePublic) !== 'string') { return void cb('INVALID_ID'); }
if (typeof(cb) !== 'function') { throw new Error('expected callback'); }
var friend = clone(friends[curvePublic]);
if (typeof(friend) !== 'object') {
return void cb('NO_FRIEND_DATA');
}
var channel = friend.channel;
if (!channel) { return void cb('E_NO_CHANNEL'); }
joining[channel] = cb;
openFriendChannel(friend, curvePublic);
};*/
messenger.sendMessage = function (id, payload, cb) {
var channel = getChannel(id);
if (!channel) { return void cb('NO_CHANNEL'); }
if (!network.webChannels.some(function (wc) {
if (wc.id === channel.wc.id) { return true; }
})) {
return void cb('NO_SUCH_CHANNEL');
}
var msg = [Types.message, proxy.curvePublic, +new Date(), payload];
if (!channel.isFriendChat) {
msg.push(proxy[Constants.displayNameKey]);
}
var msgStr = JSON.stringify(msg);
var cryptMsg = channel.encryptor.encrypt(msgStr);
channel.wc.bcast(cryptMsg).then(function () {
pushMsg(channel, cryptMsg);
cb();
}, function (err) {
cb(err);
});
};
messenger.getStatus = function (chanId, cb) {
// Display green status if one member is not me
var channel = getChannel(chanId);
if (!channel) { return void cb('NO_SUCH_CHANNEL'); }
var online = channel.userList.some(function (nId) {
var data = channel.mapId[nId] || undefined;
if (!data) { return false; }
return data.curvePublic !== proxy.curvePublic;
});
cb(void 0, online);
};
messenger.getFriendInfo = function (channel, cb) {
setTimeout(function () {
var friend;
for (var k in friends) {
if (friends[k].channel === channel) {
friend = friends[k];
break;
}
}
if (!friend) { return void cb('NO_SUCH_FRIEND'); }
// this clone will be redundant when ui uses postmessage
cb(void 0, clone(friend));
});
};
messenger.getMyInfo = function (cb) {
cb(void 0, {
curvePublic: proxy.curvePublic,
displayName: proxy[Constants.displayNameKey]
});
};
var loadFriend = function (friend, cb) {
var channel = friend.channel;
if (getChannel(channel)) { return void cb(); }
joining[channel] = cb;
var keys = Curve.deriveKeys(friend.curvePublic, proxy.curvePrivate);
var data = {
keys: keys,
channel: friend.channel,
lastKnownHash: friend.lastKnownHash,
owners: [proxy.edPublic, friend.edPublic],
isFriendChat: true
};
openChannel(data);
};
// Detect friends changes made in another worker
proxy.on('change', ['friends'], function (o, n, p) {
var curvePublic;
if (o === undefined) {
// new friend added
curvePublic = p.slice(-1)[0];
// Load channel
var friend = friends[curvePublic];
if (typeof(friend) !== 'object') { return; }
var channel = friend.channel;
if (!channel) { return; }
loadFriend(friend, function () {
eachHandler('friend', function (f) {
f(curvePublic);
});
});
return;
}
if (typeof(n) === 'undefined') {
// Handled by .on('remove')
return;
}
}).on('remove', ['friends'], function (o, p) {
var curvePublic = p[1];
if (!curvePublic) { return; }
if (p[2] !== 'channel') { return; }
var channel = channels[o];
channel.wc.leave(Types.unfriend);
delete channels[channel.id];
eachHandler('unfriend', function (f) {
f(curvePublic, true);
});
});
// Friend added in our contacts in the current worker
messenger.onFriendAdded = function (friendData) {
var friend = friends[friendData.curvePublic];
if (typeof(friend) !== 'object') { return; }
var channel = friend.channel;
if (!channel) { return; }
loadFriend(friend, function () {
eachHandler('friend', function (f) {
f(friend.curvePublic);
});
});
};
var ready = false;
var init = function () {
var friends = getFriendList(proxy);
nThen(function (waitFor) {
Object.keys(friends).forEach(function (key) {
if (key === 'me') { return; }
var friend = clone(friends[key]);
if (typeof(friend) !== 'object') { return; }
var channel = friend.channel;
if (!channel) { return; }
loadFriend(friend, waitFor());
});
// TODO load rooms
}).nThen(function () {
// TODO send event chat ready
// Remove spinner in chatbox
ready = true;
eachHandler('event', function (f) {
f('READY');
});
});
};
init();
var getRooms = function (data, cb) {
if (data && data.curvePublic) {
var curvePublic = data.curvePublic;
// We need to get data about a new friend's room
var friend = getFriend(proxy, curvePublic);
if (!friend) { return void cb({error: 'NO_SUCH_FRIEND'}); }
var channel = getChannel(friend.channel);
if (!channel) { return void cb({error: 'NO_SUCH_CHANNEL'}); }
return void cb([{
id: channel.id,
isFriendChat: true,
name: friend.displayName,
lastKnownHash: friend.lastKnownHash,
curvePublic: friend.curvePublic,
messages: channel.messages
}]);
}
if (data && data.padChat) {
var pCChannel = getChannel(data.padChat);
if (!pCChannel) { return void cb({error: 'NO_SUCH_CHANNEL'}); }
return void cb([{
id: pCChannel.id,
isPadChat: true,
messages: pCChannel.messages
}]);
}
var rooms = Object.keys(channels).map(function (id) {
var r = getChannel(id);
var name, lastKnownHash, curvePublic;
if (r.isFriendChat) {
var friend = getFriendFromChannel(id);
if (!friend) { return null; }
name = friend.displayName;
lastKnownHash = friend.lastKnownHash;
curvePublic = friend.curvePublic;
} else {
// TODO room get metadata (name) && lastKnownHash
}
return {
id: r.id,
isFriendChat: r.isFriendChat,
name: name,
lastKnownHash: lastKnownHash,
curvePublic: curvePublic,
messages: r.messages
};
}).filter(function (x) { return x; });
cb(rooms);
};
var getUserList = function (data, cb) {
var room = getChannel(data.id);
if (!room) { return void cb({error: 'NO_SUCH_CHANNEL'}); }
if (room.isFriendChat) {
var friend = getFriendFromChannel(data.id);
if (!friend) { return void cb({error: 'NO_SUCH_FRIEND'}); }
cb([friend]);
} else {
// TODO room userlist in rooms...
// (this is the static userlist, not the netflux one)
cb([]);
}
};
var openPadChat = function (data, cb) {
var channel = data.channel;
if (getChannel(channel)) {
eachHandler('event', function (f) {
f('PADCHAT_READY', channel);
});
return void cb();
}
var keys = data.secret && data.secret.keys;
var cryptKey = keys.viewKeyStr ? Crypto.b64AddSlashes(keys.viewKeyStr) : data.secret.key;
var encryptor = Crypto.createEncryptor(cryptKey);
var chanData = {
encryptor: encryptor,
channel: data.channel,
isPadChat: true,
//lastKnownHash: friend.lastKnownHash,
//owners: [proxy.edPublic, friend.edPublic],
//isFriendChat: true
};
openChannel(chanData);
joining[channel] = function () {
eachHandler('event', function (f) {
f('PADCHAT_READY', channel);
});
};
cb();
};
messenger.execCommand = function (obj, cb) {
var cmd = obj.cmd;
var data = obj.data;
if (cmd === 'IS_READY') {
return void cb(ready);
}
if (cmd === 'GET_ROOMS') {
return void getRooms(data, cb);
}
if (cmd === 'GET_USERLIST') {
return void getUserList(data, cb);
}
if (cmd === 'OPEN_PAD_CHAT') {
return void openPadChat(data, cb);
}
};
Object.freeze(messenger);
return messenger;
};
return Msg;
});