MeshCentral/agents/recoverycore.js
2019-01-21 14:05:50 -08:00

284 lines
14 KiB
JavaScript

var http = require('http');
var childProcess = require('child_process');
var meshCoreObj = { "action": "coreinfo", "value": "MeshCore Recovery", "caps": 10 }; // Capability bitmask: 1 = Desktop, 2 = Terminal, 4 = Files, 8 = Console, 16 = JavaScript
var nextTunnelIndex = 1;
var tunnels = {};
function sendConsoleText(msg)
{
require('MeshAgent').SendCommand({ "action": "msg", "type": "console", "value": msg });
}
// Split a string taking into account the quoats. Used for command line parsing
function splitArgs(str)
{
var myArray = [], myRegexp = /[^\s"]+|"([^"]*)"/gi;
do { var match = myRegexp.exec(str); if (match != null) { myArray.push(match[1] ? match[1] : match[0]); } } while (match != null);
return myArray;
}
// Parse arguments string array into an object
function parseArgs(argv)
{
var results = { '_': [] }, current = null;
for (var i = 1, len = argv.length; i < len; i++) {
var x = argv[i];
if (x.length > 2 && x[0] == '-' && x[1] == '-') {
if (current != null) { results[current] = true; }
current = x.substring(2);
} else {
if (current != null) { results[current] = toNumberIfNumber(x); current = null; } else { results['_'].push(toNumberIfNumber(x)); }
}
}
if (current != null) { results[current] = true; }
return results;
}
// Get server target url with a custom path
function getServerTargetUrl(path)
{
var x = require('MeshAgent').ServerUrl;
//sendConsoleText("mesh.ServerUrl: " + mesh.ServerUrl);
if (x == null) { return null; }
if (path == null) { path = ''; }
x = http.parseUri(x);
if (x == null) return null;
return x.protocol + '//' + x.host + ':' + x.port + '/' + path;
}
// Get server url. If the url starts with "*/..." change it, it not use the url as is.
function getServerTargetUrlEx(url)
{
if (url.substring(0, 2) == '*/') { return getServerTargetUrl(url.substring(2)); }
return url;
}
require('MeshAgent').on('Connected', function ()
{
require('os').name().then(function (v)
{
sendConsoleText("Mesh Agent Receovery Console, OS: " + v);
require('MeshAgent').SendCommand(meshCoreObj);
});
});
// Tunnel callback operations
function onTunnelUpgrade(response, s, head) {
this.s = s;
s.httprequest = this;
s.end = onTunnelClosed;
s.tunnel = this;
//sendConsoleText('onTunnelUpgrade');
if (this.tcpport != null) {
// This is a TCP relay connection, pause now and try to connect to the target.
s.pause();
s.data = onTcpRelayServerTunnelData;
var connectionOptions = { port: parseInt(this.tcpport) };
if (this.tcpaddr != null) { connectionOptions.host = this.tcpaddr; } else { connectionOptions.host = '127.0.0.1'; }
s.tcprelay = net.createConnection(connectionOptions, onTcpRelayTargetTunnelConnect);
s.tcprelay.peerindex = this.index;
} else {
// This is a normal connect for KVM/Terminal/Files
s.data = onTunnelData;
}
}
require('MeshAgent').AddCommandHandler(function (data)
{
if (typeof data == 'object')
{
// If this is a console command, parse it and call the console handler
switch (data.action)
{
case 'msg':
{
switch (data.type)
{
case 'console': { // Process a console command
if (data.value && data.sessionid)
{
var args = splitArgs(data.value);
processConsoleCommand(args[0].toLowerCase(), parseArgs(args), data.rights, data.sessionid);
}
break;
}
case 'tunnel':
{
if (data.value != null) { // Process a new tunnel connection request
// Create a new tunnel object
var xurl = getServerTargetUrlEx(data.value);
if (xurl != null) {
var woptions = http.parseUri(xurl);
woptions.rejectUnauthorized = 0;
//sendConsoleText(JSON.stringify(woptions));
var tunnel = http.request(woptions);
tunnel.on('upgrade', function (response, s, head)
{
this.s = s;
s.httprequest = this;
s.tunnel = this;
s.on('end', function ()
{
if (tunnels[this.httprequest.index] == null) return; // Stop duplicate calls.
//sendConsoleText("Tunnel #" + this.httprequest.index + " closed.", this.httprequest.sessionid);
delete tunnels[this.httprequest.index];
// Clean up WebSocket
this.removeAllListeners('data');
});
s.on('data', function (data)
{
if (this.httprequest.state == 0) {
// Check if this is a relay connection
if (data == 'c') { this.httprequest.state = 1; sendConsoleText("Tunnel #" + this.httprequest.index + " now active", this.httprequest.sessionid); }
} else {
// Handle tunnel data
if (this.httprequest.protocol == 0)
{
// Take a look at the protocol
this.httprequest.protocol = parseInt(data);
if (typeof this.httprequest.protocol != 'number') { this.httprequest.protocol = 0; }
if (this.httprequest.protocol == 1)
{
// Remote terminal using native pipes
if (process.platform == "win32")
{
this.httprequest._term = require('win-terminal').Start(80, 25);
this.httprequest._term.pipe(this, { dataTypeSkip: 1 });
this.pipe(this.httprequest._term, { dataTypeSkip: 1, end: false });
this.prependListener('end', function () { this.httprequest._term.end(function () { sendConsoleText('Terminal was closed'); }); });
}
else
{
this.httprequest.process = childProcess.execFile("/bin/sh", ["sh"], { type: childProcess.SpawnTypes.TERM });
this.httprequest.process.tunnel = this;
this.httprequest.process.on('exit', function (ecode, sig) { this.tunnel.end(); });
this.httprequest.process.stderr.on('data', function (chunk) { this.parent.tunnel.write(chunk); });
this.httprequest.process.stdout.pipe(this, { dataTypeSkip: 1 }); // 0 = Binary, 1 = Text.
this.pipe(this.httprequest.process.stdin, { dataTypeSkip: 1, end: false }); // 0 = Binary, 1 = Text.
this.prependListener('end', function () { this.httprequest.process.kill(); });
}
this.on('end', function () {
if (process.platform == "win32")
{
// Unpipe the web socket
this.unpipe(this.httprequest._term);
this.httprequest._term.unpipe(this);
// Clean up
this.httprequest._term.end();
this.httprequest._term = null;
}
});
}
}
}
});
});
tunnel.onerror = function (e) { sendConsoleText('ERROR: ' + JSON.stringify(e)); }
tunnel.sessionid = data.sessionid;
tunnel.rights = data.rights;
tunnel.state = 0;
tunnel.url = xurl;
tunnel.protocol = 0;
tunnel.tcpaddr = data.tcpaddr;
tunnel.tcpport = data.tcpport;
tunnel.end();
// Put the tunnel in the tunnels list
var index = nextTunnelIndex++;
tunnel.index = index;
tunnels[index] = tunnel;
//sendConsoleText('New tunnel connection #' + index + ': ' + tunnel.url + ', rights: ' + tunnel.rights, data.sessionid);
}
}
break;
}
default:
// Unknown action, ignore it.
break;
}
break;
}
default:
// Unknown action, ignore it.
break;
}
}
});
function processConsoleCommand(cmd, args, rights, sessionid)
{
try
{
var response = null;
switch (cmd)
{
case 'help':
response = 'Available commands are: osinfo, dbkeys, dbget, dbset, dbcompact, netinfo.';
break;
case 'osinfo': { // Return the operating system information
var i = 1;
if (args['_'].length > 0) { i = parseInt(args['_'][0]); if (i > 8) { i = 8; } response = 'Calling ' + i + ' times.'; }
for (var j = 0; j < i; j++) {
var pr = require('os').name();
pr.sessionid = sessionid;
pr.then(function (v) { sendConsoleText("OS: " + v, this.sessionid); });
}
break;
}
case 'dbkeys': { // Return all data store keys
response = JSON.stringify(db.Keys);
break;
}
case 'dbget': { // Return the data store value for a given key
if (db == null) { response = 'Database not accessible.'; break; }
if (args['_'].length != 1) {
response = 'Proper usage: dbget (key)'; // Display the value for a given database key
} else {
response = db.Get(args['_'][0]);
}
break;
}
case 'dbset': { // Set a data store key and value pair
if (db == null) { response = 'Database not accessible.'; break; }
if (args['_'].length != 2) {
response = 'Proper usage: dbset (key) (value)'; // Set a database key
} else {
var r = db.Put(args['_'][0], args['_'][1]);
response = 'Key set: ' + r;
}
break;
}
case 'dbcompact': { // Compact the data store
if (db == null) { response = 'Database not accessible.'; break; }
var r = db.Compact();
response = 'Database compacted: ' + r;
break;
}
case 'tunnels': { // Show the list of current tunnels
response = '';
for (var i in tunnels) { response += 'Tunnel #' + i + ', ' + tunnels[i].url + '\r\n'; }
if (response == '') { response = 'No websocket sessions.'; }
break;
}
case 'netinfo': { // Show network interface information
//response = objToString(mesh.NetInfo, 0, ' ');
var interfaces = require('os').networkInterfaces();
response = objToString(interfaces, 0, ' ', true);
break;
}
default: { // This is an unknown command, return an error message
response = 'Unknown command \"' + cmd + '\", type \"help\" for list of avaialble commands.';
break;
}
}
} catch (e) { response = 'Command returned an exception error: ' + e; console.log(e); }
if (response != null) { sendConsoleText(response, sessionid); }
}