telebit.js/bin/telebitd.js

661 lines
20 KiB
JavaScript
Executable File

#!/usr/bin/env node
(function () {
'use strict';
var pkg = require('../package.json');
var url = require('url');
var path = require('path');
var os = require('os');
var common = require('../lib/cli-common.js');
var http = require('http');
var YAML = require('js-yaml');
var recase = require('recase').create({});
var camelCopy = recase.camelCopy.bind(recase);
var snakeCopy = recase.snakeCopy.bind(recase);
var state = { homedir: os.homedir(), servernames: {}, ports: {} };
var argv = process.argv.slice(2);
var confIndex = argv.indexOf('--config');
var confpath;
var confargs;
if (-1 === confIndex) {
confIndex = argv.indexOf('-c');
}
if (-1 !== confIndex) {
confargs = argv.splice(confIndex, 2);
confpath = confargs[1];
}
function help() {
console.info('');
console.info('Telebit Daemon v' + pkg.version);
console.info('');
console.info('Usage:');
console.info('');
console.info('\ttelebitd --config <path>');
console.info('\tex: telebitd --config ~/.config/telebit/telebitd.yml');
console.info('');
console.info('');
console.info('Config:');
console.info('');
console.info('\tSee https://git.coolaj86.com/coolaj86/telebit.js');
console.info('');
console.info('');
}
var verstr = [ pkg.name + ' daemon v' + pkg.version ];
if (-1 === confIndex) {
// We have two possible valid paths if no --config is given (i.e. run from an npm-only install)
// * {install}/etc/telebitd.yml
// * ~/.config/telebit/telebitd.yml
// We'll asume the later since the installers include --config in the system launcher script
confpath = path.join(state.homedir, '.config/telebit/telebitd.yml');
verstr.push('(--config "' + confpath + '")');
}
if (-1 !== argv.indexOf('-h') || -1 !== argv.indexOf('--help')) {
help();
process.exit(0);
}
if (!confpath || /^--/.test(confpath)) {
help();
process.exit(1);
}
var tokenpath = path.join(path.dirname(confpath), 'access_token.txt');
var token;
try {
token = require('fs').readFileSync(tokenpath, 'ascii').trim();
} catch(e) {
// ignore
}
var controlServer;
var tun;
function serveControls() {
if (!state.config.disable) {
if (state.config.relay && (state.config.token || state.config.agreeTos)) {
tun = rawTunnel();
}
}
controlServer = http.createServer(function (req, res) {
var opts = url.parse(req.url, true);
if (opts.query._body) {
try {
opts.body = JSON.parse(opts.query._body, true);
} catch(e) {
res.statusCode = 500;
res.end('{"error":{"message":"?_body={{bad_format}}"}}');
return;
}
}
function listSuccess() {
var dumpy = {
servernames: state.servernames
, ports: state.ports
, ssh: state.config.sshAuto || 'disabled'
, code: 'CONFIG'
};
if (/\btelebit\.cloud\b/i.test(state.config.relay) && state.config.email && !state.token) {
dumpy.code = "AWAIT_AUTH";
dumpy.message = [
"Check your email."
, "You must verify your email address to activate this device."
, ""
, " Login Code (if needed): " + state.otp
].join('\n');
}
res.end(JSON.stringify(dumpy));
}
function sshSuccess() {
fs.writeFile(confpath, YAML.safeDump(snakeCopy(state.config)), function (err) {
if (err) {
res.statusCode = 500;
res.end('{"error":{"message":"Could not save config file. Perhaps you\'re not running as root?"}}');
return;
}
res.end('{"success":true}');
});
}
//
// without proper config
//
if (/\b(init|config)\b/.test(opts.pathname)) {
var conf = {};
var fresh;
if (!opts.body) {
res.statusCode = 422;
res.end('{"error":{"message":"needs more arguments"}}');
return;
}
// relay, email, agree_tos, servernames, ports
//
opts.body.forEach(function (opt) {
var parts = opt.split(/:/);
if ('true' === parts[1]) {
parts[1] = true;
} else if ('false' === parts[1]) {
parts[1] = false;
} else if ('null' === parts[1]) {
parts[1] = null;
} else if ('undefined' === parts[1]) {
parts[1] = undefined;
}
conf[parts[0]] = parts[1];
});
if (!state.config.relay || !state.config.email || !state.config.agreeTos) {
fresh = true;
}
// TODO camelCase query
state.config.email = conf.email || state.config.email || '';
if ('undefined' !== typeof conf.agree_tos) {
state.config.agreeTos = conf.agree_tos;
}
state.config.relay = conf.relay || state.config.relay || '';
state.config.token = conf.token || state.config.token || null;
state.config.secret = conf.secret || state.config.secret || null;
if ('undefined' !== typeof conf.newsletter) {
state.config.newsletter = conf.newsletter;
}
if ('undefined' !== typeof conf.community_member) {
state.config.communityMember = conf.community_member;
}
if ('undefined' !== typeof conf.telemetry) {
state.config.telemetry = conf.telemetry;
}
(conf.servernames||[]).forEach(function (key) {
if (!state.config.servernames[key]) {
state.config.servernames[key] = {};
}
});
(conf.ports||[]).forEach(function (key) {
if (!state.config.ports[key]) {
state.config.ports[key] = {};
}
});
if (!state.config.relay || !state.config.email || !state.config.agreeTos) {
res.statusCode = 400;
res.end(JSON.stringify({
error: {
code: "E_INIT"
, message: "Missing important config file params"
, _params: JSON.stringify(conf)
, _config: JSON.stringify(state.config)
, _body: JSON.stringify(opts.body)
}
}));
return;
}
if (tun) {
tun.end(function () {
tun = rawTunnel();
});
tun = null;
setTimeout(function () {
if (!tun) { tun = rawTunnel(); }
}, 3000);
} else {
tun = rawTunnel();
}
fs.writeFile(confpath, YAML.safeDump(snakeCopy(state.config)), function (err) {
if (err) {
res.statusCode = 500;
res.end('{"error":{"message":"Could not save config file after init: ' + err.message.replace(/"/g, "'")
+ '.\nPerhaps check that the file exists and your user has permissions to write it?"}}');
return;
}
listSuccess();
});
return;
}
if (/restart/.test(opts.pathname)) {
tun.end();
res.end('{"success":true}');
controlServer.close(function () {
// TODO closeAll other things
process.nextTick(function () {
// system daemon will restart the process
process.exit(22); // use non-success exit code
});
});
return;
}
//
// Check for proper config
//
if (!state.config.relay || !state.config.email || !state.config.agreeTos) {
res.statusCode = 400;
res.end('{"error":{"code":"E_CONFIG","message":"Invalid config file. Please run \'telebit init\'"}}');
return;
}
//
// With proper config
//
if (/http/.test(opts.pathname)) {
if (!opts.body) {
res.statusCode = 422;
res.end('{"error":{"message":"needs more arguments"}}');
return;
}
if (opts.body[1]) {
if (!state.servernames[opts.body[1]]) {
res.statusCode = 400;
res.end('{"error":{"message":"bad servername \'' + opts.body[1] + '\'"');
return;
}
state.servernames[opts.body[1]].handler = opts.body[0];
} else {
Object.keys(state.servernames).forEach(function (key) {
state.servernames[key].handler = opts.body[0];
});
}
res.end('{"success":true}');
return;
}
if (/tcp/.test(opts.pathname)) {
if (!opts.body) {
res.statusCode = 422;
res.end('{"error":{"message":"needs more arguments"}}');
return;
}
// portnum
if (opts.body[1]) {
if (!state.ports[opts.body[1]]) {
res.statusCode = 400;
res.end('{"error":{"message":"bad port \'' + opts.body[1] + '\'"');
return;
}
// forward-to port-or-module
state.ports[opts.body[1]].handler = opts.body[0];
} else {
Object.keys(state.ports).forEach(function (key) {
state.ports[key].handler = opts.body[0];
});
}
res.end('{"success":true}');
return;
}
if (/save|commit/.test(opts.pathname)) {
state.config.servernames = state.servernames;
state.config.ports = state.ports;
fs.writeFile(confpath, YAML.safeDump(snakeCopy(state.config)), function (err) {
if (err) {
res.statusCode = 500;
res.end('{"error":{"message":"Could not save config file. Perhaps you\'re not running as root?"}}');
return;
}
listSuccess();
});
return;
}
if (/ssh/.test(opts.pathname)) {
var sshAuto;
if (!opts.body) {
res.statusCode = 422;
res.end('{"error":{"message":"needs more arguments"}}');
return;
}
sshAuto = opts.body[0];
if (-1 !== [ 'false', 'none', 'off', 'disable' ].indexOf(sshAuto)) {
state.config.sshAuto = false;
sshSuccess();
return;
}
if (-1 !== [ 'true', 'auto', 'on', 'enable' ].indexOf(sshAuto)) {
state.config.sshAuto = 22;
sshSuccess();
return;
}
sshAuto = parseInt(sshAuto, 10);
if (!sshAuto || sshAuto <= 0 || sshAuto > 65535) {
res.statusCode = 400;
res.end('{"error":{"message":"bad ssh_auto option \'' + opts.body[0] + '\'"');
return;
}
state.config.sshAuto = sshAuto;
sshSuccess();
return;
}
if (/enable/.test(opts.pathname)) {
delete state.config.disable;// = undefined;
if (tun) {
listSuccess();
return;
}
tun = rawTunnel();
fs.writeFile(confpath, YAML.safeDump(snakeCopy(state.config)), function (err) {
if (err) {
res.statusCode = 500;
res.end('{"error":{"message":"Could not save config file. Perhaps you\'re user doesn\'t have permission?"}}');
return;
}
listSuccess();
});
return;
}
if (/disable/.test(opts.pathname)) {
state.config.disable = true;
if (tun) { tun.end(); tun = null; }
fs.writeFile(confpath, YAML.safeDump(snakeCopy(state.config)), function (err) {
if (err) {
res.statusCode = 500;
res.end('{"error":{"message":"Could not save config file. Perhaps you\'re not running as root?"}}');
return;
}
res.end('{"success":true}');
});
return;
}
if (/status/.test(opts.pathname)) {
res.end(JSON.stringify(
{ status: (state.config.disable ? 'disabled' : 'enabled')
, ready: ((state.config.relay && (state.config.token || state.config.agreeTos)) ? true : false)
}
));
return;
}
if (/list/.test(opts.pathname)) {
listSuccess();
return;
}
res.end('{"error":{"message":"unrecognized rpc"}}');
});
var fs = require('fs');
if (fs.existsSync(state._ipc.path)) {
fs.unlinkSync(state._ipc.path);
}
// mask is so that processes owned by other users
// can speak to this process, which is probably root-owned
var oldUmask = process.umask(0x0000);
controlServer.listen({
path: state._ipc.path
, writableAll: true
, readableAll: true
, exclusive: false
}, function () {
process.umask(oldUmask);
});
}
function parseConfig(err, text) {
function run() {
if (!state.config) {
state.config = {};
}
state._ipc = common.pipename(state.config, true);
console.info('');
console.info(verstr.join(' '));
if (!state.config.sock) {
console.info('(' + state._ipc.comment + ': "' + state._ipc.path + '")');
}
console.info('');
state.token = state.token || state.config.token || token;
state._confpath = confpath;
if (!state.config.servernames) {
state.config.servernames = {};
}
if (!state.config.ports) {
state.config.ports = {};
}
state.servernames = JSON.parse(JSON.stringify(state.config.servernames));
state.ports = JSON.parse(JSON.stringify(state.config.ports));
serveControls();
}
try {
state.config = JSON.parse(text || '{}');
} catch(e1) {
try {
state.config = YAML.safeLoad(text || '{}');
} catch(e2) {
console.error(e1.message);
console.error(e2.message);
process.exit(1);
return;
}
}
state.config = camelCopy(state.config || {}) || {};
run();
if ((err && 'ENOENT' === err.code) || !Object.keys(state.config).length) {
if (!err || 'ENOENT' === err.code) {
console.warn("Empty config file. Run 'telebit init' to configure.\n");
} else {
console.warn("Couldn't load config:\n\n\t" + err.message + "\n");
}
}
}
function connectTunnel() {
function sigHandler() {
console.info('Received kill signal. Attempting to exit cleanly...');
// We want to handle cleanup properly unless something is broken in our cleanup process
// that prevents us from exitting, in which case we want the user to be able to send
// the signal again and exit the way it normally would.
process.removeListener('SIGINT', sigHandler);
tun.end();
controlServer.close();
}
// reverse 2FA otp
function leftpad(i, n, c) {
while (i.toString().length < (n || 4)) {
i = (c || '0') + i;
}
return i;
}
function getOtp() {
return leftpad(Math.round(Math.random() * 9999), 4, '0');
}
process.on('SIGINT', sigHandler);
state.net = state.net || {
createConnection: function (info, cb) {
// data is the hello packet / first chunk
// info = { data, servername, port, host, remoteFamily, remoteAddress, remotePort }
var net = require('net');
// socket = { write, push, end, events: [ 'readable', 'data', 'error', 'end' ] };
var socket = net.createConnection({ port: info.port, host: info.host }, cb);
return socket;
}
};
state.otp = getOtp();
state.greenlock = state.config.greenlock || {};
state.sortingHat = state.config.sortingHat || path.resolve(__dirname, '..', 'lib/sorting-hat.js');
// TODO sortingHat.print(); ?
if (state.config.email && !state.token) {
console.info();
console.info('====================================');
console.info('= HEY! LISTEN! =');
console.info('====================================');
console.info('= =');
console.info('= 1. Open your email =');
console.info('= =');
console.info('= 2. Click the magic login link =');
console.info('= Login Code (if needed): 0000 ='.replace('0000', state.otp));
console.info('= =');
console.info('= 3. Check back here for deets =');
console.info('= =');
console.info('= =');
console.info('====================================');
console.info();
}
// TODO Check undefined vs false for greenlock config
var remote = require('../');
state.handlers = {
grant: function (grants) {
console.info("");
console.info("Connect to your device by any of the following means:");
console.info("");
grants.forEach(function (arr) {
if ('https' === arr[0]) {
if (!state.servernames[arr[1]]) {
state.servernames[arr[1]] = {};
}
} else if ('tcp' === arr[0]) {
if (!state.ports[arr[2]]) {
state.ports[arr[2]] = {};
}
}
if ('ssh+https' === arr[0]) {
console.info("SSH+HTTPS");
} else if ('ssh' === arr[0]) {
console.info("SSH");
} else if ('tcp' === arr[0]) {
console.info("TCP");
} else if ('https' === arr[0]) {
console.info("HTTPS");
}
console.info('\t' + arr[0] + '://' + arr[1] + (arr[2] ? (':' + arr[2]) : ''));
if ('ssh+https' === arr[0]) {
console.info("\tex: ssh -o ProxyCommand='openssl s_client -connect %h:%p -servername %h -quiet' " + arr[1] + " -p 443\n");
} else if ('ssh' === arr[0]) {
console.info("\tex: ssh " + arr[1] + " -p " + arr[2] + "\n");
} else if ('tcp' === arr[0]) {
console.info("\tex: netcat " + arr[1] + " " + arr[2] + "\n");
} else if ('https' === arr[0]) {
console.info("\tex: curl https://" + arr[1] + "\n");
}
});
}
, access_token: function (opts) {
state.token = opts.jwt;
state.config.token = opts.jwt;
console.info("Updating '" + tokenpath + "' with new token:");
try {
require('fs').writeFileSync(tokenpath, opts.jwt);
} catch (e) {
console.error("Token not saved:");
console.error(e);
}
}
};
state.greenlockConfig = {
version: state.greenlock.version || 'draft-11'
, server: state.greenlock.server || 'https://acme-v02.api.letsencrypt.org/directory'
, communityMember: state.greenlock.communityMember || state.config.communityMember
, telemetry: state.greenlock.telemetry || state.config.telemetry
, configDir: state.greenlock.configDir || path.resolve(__dirname, '..', 'etc/acme/')
// TODO, store: require(state.greenlock.store.name || 'le-store-certbot').create(state.greenlock.store.options || {})
, approveDomains: function (opts, certs, cb) {
// Certs being renewed are listed in certs.altnames
if (certs) {
opts.domains = certs.altnames;
cb(null, { options: opts, certs: certs });
return;
}
// by virtue of the fact that it's being tunneled through a
// trusted source that is already checking, we're good
//if (-1 !== state.config.servernames.indexOf(opts.domains[0])) {
opts.email = state.greenlock.email || state.config.email;
opts.agreeTos = state.greenlock.agree || state.config.agreeTos;
cb(null, { options: opts, certs: certs });
return;
//}
//cb(new Error("servername not found in allowed list"));
}
};
state.insecure = state.config.relay_ignore_invalid_certificates;
// { relay, config, servernames, ports, sortingHat, net, insecure, token, handlers, greenlockConfig }
var tun = remote.connect({
relay: state.relay
, config: state.config
, otp: state.otp
, sortingHat: state.sortingHat
, net: state.net
, insecure: state.insecure
, token: state.token
, servernames: state.servernames
, ports: state.ports
, handlers: state.handlers
, greenlockConfig: state.greenlockConfig
});
return tun;
}
function rawTunnel() {
if (state.config.disable || !state.config.relay || !(state.config.token || state.config.agreeTos)) {
return;
}
state.relay = state.config.relay;
if (!state.relay) {
throw new Error("'" + state._confpath + "' is missing 'relay'");
}
/*
if (!(state.config.secret || state.config.token)) {
console.error("You must use --secret or --token with --relay");
process.exit(1);
return;
}
*/
var location = url.parse(state.relay);
if (!location.protocol || /\./.test(location.protocol)) {
state.relay = 'wss://' + state.relay;
location = url.parse(state.relay);
}
var aud = location.hostname + (location.port ? ':' + location.port : '');
state.relay = location.protocol + '//' + aud;
if (!state.config.token && state.config.secret) {
var jwt = require('jsonwebtoken');
var tokenData = {
domains: Object.keys(state.config.servernames || {}).filter(function (name) { return /\./.test(name); })
, aud: aud
, iss: Math.round(Date.now() / 1000)
};
state.token = jwt.sign(tokenData, state.config.secret);
}
state.token = state.token || state.config.token;
// TODO sign token with own private key, including public key and thumbprint
// (much like ACME JOSE account)
return connectTunnel();
}
require('fs').readFile(confpath, 'utf8', parseConfig);
}());