move tls-unwrapping (it may be sharable with client)

This commit is contained in:
AJ ONeal 2018-04-25 17:41:20 +00:00
parent 98d31fc8d7
commit 07965d8eac
3 changed files with 216 additions and 203 deletions

55
lib/device-tracker.js Normal file
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@ -0,0 +1,55 @@
'use strict';
var Devices = module.exports;
Devices.add = function (store, servername, newDevice) {
var devices = store[servername] || [];
devices.push(newDevice);
store[servername] = devices;
};
Devices.remove = function (store, servername, device) {
var devices = store[servername] || [];
var index = devices.indexOf(device);
if (index < 0) {
console.warn('attempted to remove non-present device', device.deviceId, 'from', servername);
return null;
}
return devices.splice(index, 1)[0];
};
Devices.list = function (store, servername) {
if (store[servername] && store[servername].length) {
return store[servername];
}
// There wasn't an exact match so check any of the wildcard domains, sorted longest
// first so the one with the biggest natural match with be found first.
var deviceList = [];
Object.keys(store).filter(function (pattern) {
return pattern[0] === '*' && store[pattern].length;
}).sort(function (a, b) {
return b.length - a.length;
}).some(function (pattern) {
var subPiece = pattern.slice(1);
if (subPiece === servername.slice(-subPiece.length)) {
console.log('"'+servername+'" matches "'+pattern+'"');
deviceList = store[pattern];
return true;
}
});
return deviceList;
};
Devices.exist = function (store, servername) {
return !!(Devices.list(store, servername).length);
};
Devices.next = function (store, servername) {
var devices = Devices.list(store, servername);
var device;
if (devices._index >= devices.length) {
devices._index = 0;
}
device = devices[devices._index || 0];
devices._index = (devices._index || 0) + 1;
return device;
};

153
lib/unwrap-tls.js Normal file
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@ -0,0 +1,153 @@
'use strict';
var packer = require('tunnel-packer');
var sni = require('sni');
function pipeWs(servername, service, conn, remote) {
console.log('[pipeWs] servername:', servername, 'service:', service);
var browserAddr = packer.socketToAddr(conn);
browserAddr.service = service;
var cid = packer.addrToId(browserAddr);
conn.tunnelCid = cid;
console.log('[pipeWs] browser is', cid, 'home-cloud is', packer.socketToId(remote.upgradeReq.socket));
function sendWs(data, serviceOverride) {
if (remote.ws && (!conn.tunnelClosing || serviceOverride)) {
try {
remote.ws.send(packer.pack(browserAddr, data, serviceOverride), { binary: true });
// If we can't send data over the websocket as fast as this connection can send it to us
// (or there are a lot of connections trying to send over the same websocket) then we
// need to pause the connection for a little. We pause all connections if any are paused
// to make things more fair so a connection doesn't get stuck waiting for everyone else
// to finish because it got caught on the boundary. Also if serviceOverride is set it
// means the connection is over, so no need to pause it.
if (!serviceOverride && (remote.pausedConns.length || remote.ws.bufferedAmount > 1024*1024)) {
// console.log('pausing', cid, 'to allow web socket to catch up');
conn.pause();
remote.pausedConns.push(conn);
}
} catch (err) {
console.warn('[pipeWs] error sending websocket message', err);
}
}
}
remote.clients[cid] = conn;
conn.on('data', function (chunk) {
console.log('[pipeWs] data from browser to tunneler', chunk.byteLength);
sendWs(chunk);
});
conn.on('error', function (err) {
console.warn('[pipeWs] browser connection error', err);
});
conn.on('close', function (hadErr) {
console.log('[pipeWs] browser connection closing');
sendWs(null, hadErr ? 'error': 'end');
delete remote.clients[cid];
});
}
module.exports.createTcpConnectionHandler = function (copts) {
var Devices = copts.Devices;
return function onTcpConnection(conn) {
// this works when I put it here, but I don't know if it's tls yet here
// httpsServer.emit('connection', socket);
//tls3000.emit('connection', socket);
//var tlsSocket = new tls.TLSSocket(socket, { secureContext: tls.createSecureContext(tlsOpts) });
//tlsSocket.on('data', function (chunk) {
// console.log('dummy', chunk.byteLength);
//});
//return;
conn.once('data', function (firstChunk) {
// BUG XXX: this assumes that the packet won't be chunked smaller
// than the 'hello' or the point of the 'Host' header.
// This is fairly reasonable, but there are edge cases where
// it does not hold (such as manual debugging with telnet)
// and so it should be fixed at some point in the future
// defer after return (instead of being in many places)
process.nextTick(function () {
conn.unshift(firstChunk);
});
var service = 'tcp';
var servername;
var str;
var m;
function tryTls() {
if (-1 !== copts.servernames.indexOf(servername)) {
console.log("Lock and load, admin interface time!");
copts.httpsTunnel(servername, conn);
return;
}
if (!servername) {
console.log("No SNI was given, so there's nothing we can do here");
copts.httpsInvalid(servername, conn);
return;
}
var nextDevice = Devices.next(copts.deviceLists, servername);
if (!nextDevice) {
console.log("No devices match the given servername");
copts.httpsInvalid(servername, conn);
return;
}
console.log("pipeWs(servername, service, socket, deviceLists['" + servername + "'])");
pipeWs(servername, service, conn, nextDevice);
}
// https://github.com/mscdex/httpolyglot/issues/3#issuecomment-173680155
if (22 === firstChunk[0]) {
// TLS
service = 'https';
servername = (sni(firstChunk)||'').toLowerCase();
console.log("tls hello servername:", servername);
tryTls();
return;
}
if (firstChunk[0] > 32 && firstChunk[0] < 127) {
str = firstChunk.toString();
m = str.match(/(?:^|[\r\n])Host: ([^\r\n]+)[\r\n]*/im);
servername = (m && m[1].toLowerCase() || '').split(':')[0];
console.log('servername', servername);
if (/HTTP\//i.test(str)) {
service = 'http';
// TODO disallow http entirely
// /^\/\.well-known\/acme-challenge\//.test(str)
if (/well-known/.test(str)) {
// HTTP
if (Devices.exist(copts.deviceLists, servername)) {
pipeWs(servername, service, conn, Devices.next(copts.deviceLists, servername));
return;
}
copts.handleHttp(servername, conn);
}
else {
// redirect to https
copts.handleInsecureHttp(servername, conn);
}
return;
}
}
console.error("Got unexpected connection", str);
conn.write(JSON.stringify({ error: {
message: "not sure what you were trying to do there..."
, code: 'E_INVALID_PROTOCOL' }
}));
conn.end();
});
conn.on('error', function (err) {
console.error('[error] tcp socket raw TODO forward and close');
console.error(err);
});
};
};

View File

@ -1,6 +1,5 @@
'use strict';
var sni = require('sni');
var url = require('url');
var PromiseA = require('bluebird');
var jwt = require('jsonwebtoken');
@ -12,65 +11,16 @@ function timeoutPromise(duration) {
});
}
var Devices = {};
Devices.add = function (store, servername, newDevice) {
var devices = store[servername] || [];
devices.push(newDevice);
store[servername] = devices;
};
Devices.remove = function (store, servername, device) {
var devices = store[servername] || [];
var index = devices.indexOf(device);
if (index < 0) {
console.warn('attempted to remove non-present device', device.deviceId, 'from', servername);
return null;
}
return devices.splice(index, 1)[0];
};
Devices.list = function (store, servername) {
if (store[servername] && store[servername].length) {
return store[servername];
}
// There wasn't an exact match so check any of the wildcard domains, sorted longest
// first so the one with the biggest natural match with be found first.
var deviceList = [];
Object.keys(store).filter(function (pattern) {
return pattern[0] === '*' && store[pattern].length;
}).sort(function (a, b) {
return b.length - a.length;
}).some(function (pattern) {
var subPiece = pattern.slice(1);
if (subPiece === servername.slice(-subPiece.length)) {
console.log('"'+servername+'" matches "'+pattern+'"');
deviceList = store[pattern];
return true;
}
});
return deviceList;
};
Devices.exist = function (store, servername) {
return !!(Devices.list(store, servername).length);
};
Devices.next = function (store, servername) {
var devices = Devices.list(store, servername);
var device;
if (devices._index >= devices.length) {
devices._index = 0;
}
device = devices[devices._index || 0];
devices._index = (devices._index || 0) + 1;
return device;
};
var Devices = require('./lib/device-tracker');
module.exports.store = { Devices: Devices };
module.exports.create = function (copts) {
var deviceLists = {};
copts.deviceLists = {};
//var deviceLists = {};
var activityTimeout = copts.activityTimeout || 2*60*1000;
var pongTimeout = copts.pongTimeout || 10*1000;
copts.Devices = Devices;
var onTcpConnection = require('./lib/unwrap-tls').createTcpConnectionHandler(copts);
function onWsConnection(ws, upgradeReq) {
console.log(ws);
@ -204,7 +154,7 @@ module.exports.create = function (copts) {
token.domains.forEach(function (domainname) {
console.log('domainname', domainname);
Devices.add(deviceLists, domainname, token);
Devices.add(copts.deviceLists, domainname, token);
});
remotes[jwtoken] = token;
console.log("added token '" + token.deviceId + "' to websocket", socketId);
@ -220,7 +170,7 @@ module.exports.create = function (copts) {
// Prevent any more browser connections being sent to this remote, and any existing
// connections from trying to send more data across the connection.
remote.domains.forEach(function (domainname) {
Devices.remove(deviceLists, domainname, remote);
Devices.remove(copts.deviceLists, domainname, remote);
});
remote.ws = null;
remote.upgradeReq = null;
@ -437,154 +387,9 @@ module.exports.create = function (copts) {
sendTunnelMsg(null, [1, 'hello', [unpacker._version], Object.keys(commandHandlers)], 'control');
}
function pipeWs(servername, service, conn, remote) {
console.log('[pipeWs] servername:', servername, 'service:', service);
var browserAddr = packer.socketToAddr(conn);
browserAddr.service = service;
var cid = packer.addrToId(browserAddr);
conn.tunnelCid = cid;
console.log('[pipeWs] browser is', cid, 'home-cloud is', packer.socketToId(remote.upgradeReq.socket));
function sendWs(data, serviceOverride) {
if (remote.ws && (!conn.tunnelClosing || serviceOverride)) {
try {
remote.ws.send(packer.pack(browserAddr, data, serviceOverride), { binary: true });
// If we can't send data over the websocket as fast as this connection can send it to us
// (or there are a lot of connections trying to send over the same websocket) then we
// need to pause the connection for a little. We pause all connections if any are paused
// to make things more fair so a connection doesn't get stuck waiting for everyone else
// to finish because it got caught on the boundary. Also if serviceOverride is set it
// means the connection is over, so no need to pause it.
if (!serviceOverride && (remote.pausedConns.length || remote.ws.bufferedAmount > 1024*1024)) {
// console.log('pausing', cid, 'to allow web socket to catch up');
conn.pause();
remote.pausedConns.push(conn);
}
} catch (err) {
console.warn('[pipeWs] error sending websocket message', err);
}
}
}
remote.clients[cid] = conn;
conn.on('data', function (chunk) {
console.log('[pipeWs] data from browser to tunneler', chunk.byteLength);
sendWs(chunk);
});
conn.on('error', function (err) {
console.warn('[pipeWs] browser connection error', err);
});
conn.on('close', function (hadErr) {
console.log('[pipeWs] browser connection closing');
sendWs(null, hadErr ? 'error': 'end');
delete remote.clients[cid];
});
}
function onTcpConnection(conn) {
// this works when I put it here, but I don't know if it's tls yet here
// httpsServer.emit('connection', socket);
//tls3000.emit('connection', socket);
//var tlsSocket = new tls.TLSSocket(socket, { secureContext: tls.createSecureContext(tlsOpts) });
//tlsSocket.on('data', function (chunk) {
// console.log('dummy', chunk.byteLength);
//});
//return;
conn.once('data', function (firstChunk) {
// BUG XXX: this assumes that the packet won't be chunked smaller
// than the 'hello' or the point of the 'Host' header.
// This is fairly reasonable, but there are edge cases where
// it does not hold (such as manual debugging with telnet)
// and so it should be fixed at some point in the future
// defer after return (instead of being in many places)
process.nextTick(function () {
conn.unshift(firstChunk);
});
var service = 'tcp';
var servername;
var str;
var m;
function tryTls() {
if (-1 !== copts.servernames.indexOf(servername)) {
console.log("Lock and load, admin interface time!");
copts.httpsTunnel(servername, conn);
return;
}
if (!servername) {
console.log("No SNI was given, so there's nothing we can do here");
copts.httpsInvalid(servername, conn);
return;
}
var nextDevice = Devices.next(deviceLists, servername);
if (!nextDevice) {
console.log("No devices match the given servername");
copts.httpsInvalid(servername, conn);
return;
}
console.log("pipeWs(servername, service, socket, deviceLists['" + servername + "'])");
pipeWs(servername, service, conn, nextDevice);
}
// https://github.com/mscdex/httpolyglot/issues/3#issuecomment-173680155
if (22 === firstChunk[0]) {
// TLS
service = 'https';
servername = (sni(firstChunk)||'').toLowerCase();
console.log("tls hello servername:", servername);
tryTls();
return;
}
if (firstChunk[0] > 32 && firstChunk[0] < 127) {
str = firstChunk.toString();
m = str.match(/(?:^|[\r\n])Host: ([^\r\n]+)[\r\n]*/im);
servername = (m && m[1].toLowerCase() || '').split(':')[0];
console.log('servername', servername);
if (/HTTP\//i.test(str)) {
service = 'http';
// TODO disallow http entirely
// /^\/\.well-known\/acme-challenge\//.test(str)
if (/well-known/.test(str)) {
// HTTP
if (Devices.exist(deviceLists, servername)) {
pipeWs(servername, service, conn, Devices.next(deviceLists, servername));
return;
}
copts.handleHttp(servername, conn);
}
else {
// redirect to https
copts.handleInsecureHttp(servername, conn);
}
return;
}
}
console.error("Got unexpected connection", str);
conn.write(JSON.stringify({ error: {
message: "not sure what you were trying to do there..."
, code: 'E_INVALID_PROTOCOL' }
}));
conn.end();
});
conn.on('error', function (err) {
console.error('[error] tcp socket raw TODO forward and close');
console.error(err);
});
}
return {
tcp: onTcpConnection
, ws: onWsConnection
, isClientDomain: Devices.exist.bind(null, deviceLists)
, isClientDomain: Devices.exist.bind(null, copts.deviceLists)
};
};