mirror of
https://github.com/Ylianst/MeshCentral.git
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498 lines
20 KiB
JavaScript
498 lines
20 KiB
JavaScript
/**
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* @description APF/CIRA Client for duktape
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* @author Joko Sastriawan
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* @copyright Intel Corporation 2019
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* @license Apache-2.0
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* @version v0.0.1
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*/
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function CreateAPFClient(parent, args) {
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var obj = {};
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obj.parent = parent;
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obj.args = args;
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obj.http = require('http');
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//obj.common = require('common');
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obj.net = require('net');
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obj.forwardClient = null;
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obj.downlinks = {};
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obj.pfwd_idx = 0;
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// keep alive timer
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obj.timer = null;
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// some function copied from common.js
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function ReadInt(v, p) {
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return (v.charCodeAt(p) * 0x1000000) + (v.charCodeAt(p + 1) << 16) + (v.charCodeAt(p + 2) << 8) + v.charCodeAt(p + 3);
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}; // We use "*0x1000000" instead of "<<24" because the shift converts the number to signed int32.
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function IntToStr(v) {
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return String.fromCharCode((v >> 24) & 0xFF, (v >> 16) & 0xFF, (v >> 8) & 0xFF, v & 0xFF);
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};
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function hex2rstr(d) {
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var r = '', m = ('' + d).match(/../g), t;
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while (t = m.shift()) { r += String.fromCharCode('0x' + t); }
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return r;
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};
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// Convert decimal to hex
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function char2hex(i) { return (i + 0x100).toString(16).substr(-2).toUpperCase(); };
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// Convert a raw string to a hex string
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function rstr2hex(input) {
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var r = '', i;
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for (i = 0; i < input.length; i++) { r += char2hex(input.charCodeAt(i)); }
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return r;
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};
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function d2h(d) {
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return (d / 256 + 1 / 512).toString(16).substring(2, 4);
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}
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function buf2hex(input) {
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var r = '', i;
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for (i = 0; i < input.length; i++) { r += d2h(input[i]); }
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return r;
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};
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function Debug(str) {
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if (obj.parent.debug) {
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console.log(str);
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}
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}
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// CIRA state
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var CIRASTATE = {
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INITIAL: 0,
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PROTOCOL_VERSION_SENT: 1,
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AUTH_SERVICE_REQUEST_SENT: 2,
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AUTH_REQUEST_SENT: 3,
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PFWD_SERVICE_REQUEST_SENT: 4,
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GLOBAL_REQUEST_SENT: 5,
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FAILED: -1
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}
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obj.cirastate = CIRASTATE.INITIAL;
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// REDIR state
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var REDIR_TYPE = {
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REDIR_UNKNOWN: 0,
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REDIR_SOL: 1,
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REDIR_KVM: 2,
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REDIR_IDER: 3
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}
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// redirection start command
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obj.RedirectStartSol = String.fromCharCode(0x10, 0x00, 0x00, 0x00, 0x53, 0x4F, 0x4C, 0x20);
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obj.RedirectStartKvm = String.fromCharCode(0x10, 0x01, 0x00, 0x00, 0x4b, 0x56, 0x4d, 0x52);
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obj.RedirectStartIder = String.fromCharCode(0x10, 0x00, 0x00, 0x00, 0x49, 0x44, 0x45, 0x52);
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// AMT forwarded port list for non-TLS mode
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var pfwd_ports = [16992, 623, 16994, 5900];
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// protocol definitions
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var APFProtocol = {
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UNKNOWN: 0,
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DISCONNECT: 1,
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SERVICE_REQUEST: 5,
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SERVICE_ACCEPT: 6,
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USERAUTH_REQUEST: 50,
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USERAUTH_FAILURE: 51,
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USERAUTH_SUCCESS: 52,
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GLOBAL_REQUEST: 80,
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REQUEST_SUCCESS: 81,
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REQUEST_FAILURE: 82,
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CHANNEL_OPEN: 90,
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CHANNEL_OPEN_CONFIRMATION: 91,
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CHANNEL_OPEN_FAILURE: 92,
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CHANNEL_WINDOW_ADJUST: 93,
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CHANNEL_DATA: 94,
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CHANNEL_CLOSE: 97,
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PROTOCOLVERSION: 192,
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KEEPALIVE_REQUEST: 208,
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KEEPALIVE_REPLY: 209,
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KEEPALIVE_OPTIONS_REQUEST: 210,
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KEEPALIVE_OPTIONS_REPLY: 211
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}
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var APFDisconnectCode = {
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HOST_NOT_ALLOWED_TO_CONNECT: 1,
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PROTOCOL_ERROR: 2,
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KEY_EXCHANGE_FAILED: 3,
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RESERVED: 4,
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MAC_ERROR: 5,
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COMPRESSION_ERROR: 6,
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SERVICE_NOT_AVAILABLE: 7,
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PROTOCOL_VERSION_NOT_SUPPORTED: 8,
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HOST_KEY_NOT_VERIFIABLE: 9,
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CONNECTION_LOST: 10,
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BY_APPLICATION: 11,
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TOO_MANY_CONNECTIONS: 12,
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AUTH_CANCELLED_BY_USER: 13,
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NO_MORE_AUTH_METHODS_AVAILABLE: 14,
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INVALID_CREDENTIALS: 15,
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CONNECTION_TIMED_OUT: 16,
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BY_POLICY: 17,
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TEMPORARILY_UNAVAILABLE: 18
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}
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var APFChannelOpenFailCodes = {
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ADMINISTRATIVELY_PROHIBITED: 1,
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CONNECT_FAILED: 2,
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UNKNOWN_CHANNEL_TYPE: 3,
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RESOURCE_SHORTAGE: 4,
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}
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var APFChannelOpenFailureReasonCode = {
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AdministrativelyProhibited: 1,
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ConnectFailed: 2,
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UnknownChannelType: 3,
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ResourceShortage: 4,
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}
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obj.onSecureConnect = function onSecureConnect(resp, ws, head) {
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Debug("APF Secure WebSocket connected.");
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//console.log(JSON.stringify(resp));
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obj.forwardClient.tag = { accumulator: [] };
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obj.forwardClient.ws = ws;
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obj.forwardClient.ws.on('end', function () {
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Debug("APF: Connection is closing.");
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if (obj.timer != null) {
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clearInterval(obj.timer);
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obj.timer = null;
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}
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});
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obj.forwardClient.ws.on('data', function (data) {
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obj.forwardClient.tag.accumulator += hex2rstr(buf2hex(data));
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try {
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var len = 0;
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do {
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len = ProcessData(obj.forwardClient);
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if (len > 0) {
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obj.forwardClient.tag.accumulator = obj.forwardClient.tag.accumulator.slice(len);
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}
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if (obj.cirastate == CIRASTATE.FAILED) {
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Debug("APF: in a failed state, destroying socket.")
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obj.forwardClient.ws.end();
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}
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} while (len > 0);
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} catch (e) {
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Debug(e);
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}
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});
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obj.forwardClient.ws.on('error', function (e) {
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Debug("APF: Connection error, ending connecting.");
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if (obj.timer != null) {
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clearInterval(obj.timer);
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obj.timer = null;
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}
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});
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obj.state = CIRASTATE.INITIAL;
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SendProtocolVersion(obj.forwardClient.ws, obj.args.clientuuid);
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SendServiceRequest(obj.forwardClient.ws, 'auth@amt.intel.com');
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}
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function guidToStr(g) { return g.substring(6, 8) + g.substring(4, 6) + g.substring(2, 4) + g.substring(0, 2) + "-" + g.substring(10, 12) + g.substring(8, 10) + "-" + g.substring(14, 16) + g.substring(12, 14) + "-" + g.substring(16, 20) + "-" + g.substring(20); }
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function strToGuid(s) {
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s = s.replace(/-/g, '');
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var ret = s.substring(6, 8) + s.substring(4, 6) + s.substring(2, 4) + s.substring(0, 2);
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ret += s.substring(10, 12) + s.substring(8, 10) + s.substring(14, 16) + s.substring(12, 14) + s.substring(16, 20) + s.substring(20);
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return ret;
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}
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function binzerostring(len) {
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var res='';
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for (var l=0; l< len ; l++) {
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res+=String.fromCharCode(0 & 0xFF);
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}
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return res;
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}
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function SendProtocolVersion(socket, uuid) {
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var buuid = strToGuid(uuid);
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var data = String.fromCharCode(APFProtocol.PROTOCOLVERSION) + '' + IntToStr(1) + IntToStr(0) + IntToStr(0) + hex2rstr(buuid) + binzerostring(64);
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socket.write(data);
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Debug("APF: Send protocol version 1 0 " + uuid);
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obj.cirastate = CIRASTATE.PROTOCOL_VERSION_SENT;
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}
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function SendServiceRequest(socket, service) {
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var data = String.fromCharCode(APFProtocol.SERVICE_REQUEST) + IntToStr(service.length) + service;
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socket.write(data);
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Debug("APF: Send service request " + service);
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if (service == 'auth@amt.intel.com') {
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obj.cirastate = CIRASTATE.AUTH_SERVICE_REQUEST_SENT;
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} else if (service == 'pfwd@amt.intel.com') {
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obj.cirastate = CIRASTATE.PFWD_SERVICE_REQUEST_SENT;
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}
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}
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function SendUserAuthRequest(socket, user, pass) {
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var service = "pfwd@amt.intel.com";
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var data = String.fromCharCode(APFProtocol.USERAUTH_REQUEST) + IntToStr(user.length) + user + IntToStr(service.length) + service;
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//password auth
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data += IntToStr(8) + 'password';
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data += binzerostring(1) + IntToStr(pass.length) + pass;
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socket.write(data);
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Debug("APF: Send username password authentication to MPS");
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obj.cirastate = CIRASTATE.AUTH_REQUEST_SENT;
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}
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function SendGlobalRequestPfwd(socket, amthostname, amtport) {
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var tcpipfwd = 'tcpip-forward';
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var data = String.fromCharCode(APFProtocol.GLOBAL_REQUEST) + IntToStr(tcpipfwd.length) + tcpipfwd + binzerostring(1, 1);
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data += IntToStr(amthostname.length) + amthostname + IntToStr(amtport);
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socket.write(data);
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Debug("APF: Send tcpip-forward " + amthostname + ":" + amtport);
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obj.cirastate = CIRASTATE.GLOBAL_REQUEST_SENT;
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}
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function SendKeepAliveRequest(socket) {
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var data = String.fromCharCode(APFProtocol.KEEPALIVE_REQUEST) + IntToStr(255);
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socket.write(data);
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Debug("APF: Send keepalive request");
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}
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function SendKeepAliveReply(socket, cookie) {
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var data = String.fromCharCode(APFProtocol.KEEPALIVE_REPLY) + IntToStr(cookie);
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socket.write(data);
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Debug("APF: Send keepalive reply");
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}
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function ProcessData(socket) {
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var cmd = socket.tag.accumulator.charCodeAt(0);
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var len = socket.tag.accumulator.length;
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var data = socket.tag.accumulator;
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if (len == 0) { return 0; }
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// respond to MPS according to obj.cirastate
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switch (cmd) {
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case APFProtocol.SERVICE_ACCEPT: {
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var slen = ReadInt(data, 1);
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var service = data.substring(5, 6 + slen);
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Debug("APF: Service request to " + service + " accepted.");
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if (service == 'auth@amt.intel.com') {
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if (obj.cirastate >= CIRASTATE.AUTH_SERVICE_REQUEST_SENT) {
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SendUserAuthRequest(socket.ws, obj.args.mpsuser, obj.args.mpspass);
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}
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} else if (service == 'pfwd@amt.intel.com') {
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if (obj.cirastate >= CIRASTATE.PFWD_SERVICE_REQUEST_SENT) {
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SendGlobalRequestPfwd(socket.ws, obj.args.clientname, pfwd_ports[obj.pfwd_idx++]);
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}
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}
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return 5 + slen;
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}
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case APFProtocol.REQUEST_SUCCESS: {
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if (len >= 5) {
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var port = ReadInt(data, 1);
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Debug("APF: Request to port forward " + port + " successful.");
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// iterate to pending port forward request
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if (obj.pfwd_idx < pfwd_ports.length) {
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SendGlobalRequestPfwd(socket.ws, obj.args.clientname, pfwd_ports[obj.pfwd_idx++]);
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} else {
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// no more port forward, now setup timer to send keep alive
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Debug("APF: Start keep alive for every " + obj.args.mpskeepalive + " ms.");
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obj.timer = setInterval(function () {
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SendKeepAliveRequest(obj.forwardClient.ws);
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}, obj.args.mpskeepalive);//
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}
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return 5;
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}
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Debug("APF: Request successful.");
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return 1;
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}
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case APFProtocol.USERAUTH_SUCCESS: {
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Debug("APF: User Authentication successful");
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// Send Pfwd service request
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SendServiceRequest(socket.ws, 'pfwd@amt.intel.com');
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return 1;
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}
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case APFProtocol.USERAUTH_FAILURE: {
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Debug("APF: User Authentication failed");
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obj.cirastate = CIRASTATE.FAILED;
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return 14;
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}
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case APFProtocol.KEEPALIVE_REQUEST: {
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Debug("APF: Keep Alive Request with cookie: " + ReadInt(data, 1));
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SendKeepAliveReply(socket.ws, ReadInt(data, 1));
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return 5;
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}
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case APFProtocol.KEEPALIVE_REPLY: {
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Debug("APF: Keep Alive Reply with cookie: " + ReadInt(data, 1));
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return 5;
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}
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// Channel management
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case APFProtocol.CHANNEL_OPEN: {
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//parse CHANNEL OPEN request
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var p_res = parseChannelOpen(data);
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Debug("APF: CHANNEL_OPEN request: " + JSON.stringify(p_res));
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// Check if target port is in pfwd_ports
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if (pfwd_ports.indexOf(p_res.target_port) >= 0) {
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// connect socket to that port
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obj.downlinks[p_res.sender_chan] = obj.net.createConnection({ host: obj.args.clientaddress, port: p_res.target_port }, function () {
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//obj.downlinks[p_res.sender_chan].setEncoding('binary');//assume everything is binary, not interpreting
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SendChannelOpenConfirm(socket.ws, p_res);
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});
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obj.downlinks[p_res.sender_chan].on('data', function (ddata) {
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//Relay data to fordwardclient
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SendChannelData(socket.ws, p_res.sender_chan, ddata.length, ddata);
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});
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obj.downlinks[p_res.sender_chan].on('error', function (e) {
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Debug("Downlink connection error: " + e);
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});
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obj.downlinks[p_res.sender_chan].on('end', function () {
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if (obj.downlinks[p_res.sender_chan]) {
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try {
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Debug("Socket ends.");
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SendChannelClose(socket.ws, p_res.sender_chan);
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// add some delay before removing... otherwise race condition
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setTimeout(function () { delete obj.downlinks[p_res.sender_chan];},100);
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} catch (e) {
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Debug("Downlink connection exception: " + e);
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}
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}
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});
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} else {
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SendChannelOpenFailure(socket.ws, p_res);
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}
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return p_res.len;
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}
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case APFProtocol.CHANNEL_OPEN_CONFIRMATION: {
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Debug("APF: CHANNEL_OPEN_CONFIRMATION");
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return 17;
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}
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case APFProtocol.CHANNEL_CLOSE: {
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var rcpt_chan = ReadInt(data, 1);
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Debug("APF: CHANNEL_CLOSE: " + rcpt_chan);
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SendChannelClose(socket.ws, rcpt_chan);
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try {
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obj.downlinks[rcpt_chan].end();
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delete obj.downlinks[rcpt_chan];
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} catch (e) { }
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return 5;
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}
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case APFProtocol.CHANNEL_DATA: {
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Debug("APF: CHANNEL_DATA: " + JSON.stringify(rstr2hex(data)));
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var rcpt_chan = ReadInt(data, 1);
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var chan_data_len = ReadInt(data, 5);
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var chan_data = data.substring(9, 9 + chan_data_len);
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if (obj.downlinks[rcpt_chan]) {
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try {
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obj.downlinks[rcpt_chan].write(chan_data, 'binary', function () {
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Debug("Write completed.");
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SendChannelWindowAdjust(socket.ws, rcpt_chan, chan_data_len);//I have full window capacity now
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});
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} catch (e) {
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Debug("Cannot forward data to downlink socket.");
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}
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}
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return 9 + chan_data_len;
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}
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case APFProtocol.CHANNEL_WINDOW_ADJUST: {
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Debug("APF: CHANNEL_WINDOW_ADJUST ");
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return 9;
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}
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default: {
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Debug("CMD: " + cmd + " is not implemented.");
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obj.cirastate = CIRASTATE.FAILED;
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return 0;
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}
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}
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}
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function parseChannelOpen(data) {
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var result = {
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len: 0, //to be filled later
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cmd: APFProtocol.CHANNEL_OPEN,
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chan_type: "", //to be filled later
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sender_chan: 0, //to be filled later
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window_size: 0, //to be filled later
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target_address: "", //to be filled later
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target_port: 0, //to be filled later
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origin_address: "", //to be filled later
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origin_port: 0, //to be filled later
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};
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var chan_type_slen = ReadInt(data, 1);
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result.chan_type = data.substring(5, 5 + chan_type_slen);
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result.sender_chan = ReadInt(data, 5 + chan_type_slen);
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result.window_size = ReadInt(data, 9 + chan_type_slen);
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var c_len = ReadInt(data, 17 + chan_type_slen);
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result.target_address = data.substring(21 + chan_type_slen, 21 + chan_type_slen + c_len);
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result.target_port = ReadInt(data, 21 + chan_type_slen + c_len);
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var o_len = ReadInt(data, 25 + chan_type_slen + c_len);
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result.origin_address = data.substring(29 + chan_type_slen + c_len, 29 + chan_type_slen + c_len + o_len);
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result.origin_port = ReadInt(data, 29 + chan_type_slen + c_len + o_len);
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result.len = 33 + chan_type_slen + c_len + o_len;
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return result;
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}
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function SendChannelOpenFailure(socket, chan_data) {
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var data = String.fromCharCode(APFProtocol.CHANNEL_OPEN_FAILURE) + IntToStr(chan_data.sender_chan)
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+ IntToStr(2) + IntToStr(0) + IntToStr(0);
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socket.write(data);
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Debug("APF: Send ChannelOpenFailure");
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}
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function SendChannelOpenConfirm(socket, chan_data) {
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var data = String.fromCharCode(APFProtocol.CHANNEL_OPEN_CONFIRMATION) + IntToStr(chan_data.sender_chan)
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+ IntToStr(chan_data.sender_chan) + IntToStr(chan_data.window_size) + IntToStr(0xFFFFFFFF);
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socket.write(data);
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Debug("APF: Send ChannelOpenConfirmation");
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}
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function SendChannelWindowAdjust(socket, chan, size) {
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var data = String.fromCharCode(APFProtocol.CHANNEL_WINDOW_ADJUST) + IntToStr(chan) + IntToStr(size);
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socket.write(data);
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Debug("APF: Send ChannelWindowAdjust: " + rstr2hex(data));
|
|
}
|
|
|
|
function SendChannelData(socket, chan, len, data) {
|
|
var buf = String.fromCharCode(APFProtocol.CHANNEL_DATA) + IntToStr(chan) + IntToStr(len) + data;
|
|
socket.write(buf);
|
|
Debug("APF: Send ChannelData: " + rstr2hex(buf));
|
|
}
|
|
|
|
function SendChannelClose(socket, chan) {
|
|
var buf = String.fromCharCode(APFProtocol.CHANNEL_CLOSE) + IntToStr(chan);
|
|
socket.write(buf);
|
|
Debug("APF: Send ChannelClose ");
|
|
}
|
|
|
|
obj.connect = function () {
|
|
if (obj.forwardClient != null) {
|
|
try {
|
|
obj.forwardClient.ws.end();
|
|
} catch (e) {
|
|
Debug(e);
|
|
}
|
|
//obj.forwardClient = null;
|
|
}
|
|
obj.cirastate = CIRASTATE.INITIAL;
|
|
obj.pfwd_idx = 0;
|
|
|
|
//obj.forwardClient = new obj.ws(obj.args.mpsurl, obj.tlsoptions);
|
|
//obj.forwardClient.on("open", obj.onSecureConnect);
|
|
|
|
|
|
var wsoptions = obj.http.parseUri(obj.args.mpsurl);
|
|
wsoptions.rejectUnauthorized = 0;
|
|
obj.forwardClient = obj.http.request(wsoptions);
|
|
obj.forwardClient.upgrade = obj.onSecureConnect;
|
|
obj.forwardClient.end(); // end request, trigger completion of HTTP request
|
|
}
|
|
|
|
obj.disconnect = function () {
|
|
try {
|
|
obj.forwardClient.ws.end();
|
|
} catch (e) {
|
|
Debug(e);
|
|
}
|
|
}
|
|
|
|
return obj;
|
|
}
|
|
|
|
module.exports = CreateAPFClient;
|