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MeshCommander/amt-redir-node-0.1.0.js
EstiFeit e56b9c0ece TLS: implement ECDHE/DHE key exchange and cipher suites 
- Updated cipher suites to include modern algorithms with SHA-256 and SHA-384 support.
- Implemented Diffie-Hellman Ephemeral (DHE) and Elliptic Curve Diffie-Hellman (ECDH) key exchange methods.
- Added HMAC-SHA256 and HMAC-SHA384 for message authentication.
- Improved TLS handshake process to accommodate new key exchange algorithms.

This update strengthens the security of the TLS implementation and aligns with current best practices.
2025-09-09 22:30:39 +03:00

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JavaScript
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/**
* @description Intel AMT Redirection Transport Module - using Node
* @author Ylian Saint-Hilaire
* @version v0.0.1f
*/
// Construct a MeshServer object
var CreateAmtRedirect = function (module) {
var obj = {};
obj.m = module; // This is the inner module (Terminal or Desktop)
module.parent = obj;
obj.State = 0;
obj.net = require('net');
obj.tls = require('tls');
obj.crypto = require('crypto');
obj.constants = require('constants');
obj.socket = null;
obj.host = null;
obj.port = 0;
obj.user = null;
obj.pass = null;
obj.connectstate = 0;
obj.protocol = module.protocol; // 1 = SOL, 2 = KVM, 3 = IDER
obj.xtlsoptions = null;
obj.amtaccumulator = '';
obj.amtsequence = 1;
obj.amtkeepalivetimer = null;
obj.authuri = '/RedirectionService';
obj.digestRealmMatch = null;
obj.onStateChanged = null;
obj.disconnectCode = 0; // 2 = BUSY, 3 = UNSUPPORTED, 256 = ERROR, 50000 = RLE16 fail, 50001 = AmtDisconnect.
function ToIntStr(v) { return String.fromCharCode((v & 0xFF), ((v >> 8) & 0xFF), ((v >> 16) & 0xFF), ((v >> 24) & 0xFF)); }
function ToShortStr(v) { return String.fromCharCode((v & 0xFF), ((v >> 8) & 0xFF)); }
function arrToStr(arr) { return String.fromCharCode.apply(null, arr); }
function randomHex(length) { var r = ''; for (var i = 0; i < length; i++) { r += 'abcdef0123456789'.charAt(Math.floor(Math.random() * 16)); } return r; }
// Private method
//obj.Debug = function (msg) { console.log(msg); }
obj.Start = function (host, port, user, pass, tls, tlsFingerprint, tlsoptions) {
obj.host = host;
obj.port = port;
obj.user = user;
obj.pass = pass;
obj.xtls = tls;
obj.xtlsoptions = tlsoptions;
obj.xtlsFingerprint = tlsFingerprint;
obj.connectstate = 0;
obj.disconnectCode = 0;
if (obj.xtlsoptions && obj.xtlsoptions.meshServerConnect) {
// Use the websocket wrapper to connect to MeshServer server
obj.socket = CreateWebSocketWrapper(obj.xtlsoptions.host, obj.xtlsoptions.port, '/webrelay.ashx?user=' + encodeURIComponent(obj.xtlsoptions.username) + '&pass=' + encodeURIComponent(obj.xtlsoptions.password) + '&host=' + encodeURIComponent(obj.host) + '&p=2&tls=' + tlsFingerprint.xtls + '&tls1only=' + tlsFingerprint.xtlsMethod, obj.xtlsoptions.xtlsFingerprint);
//obj.socket.setEncoding('binary');
obj.socket.ondata = obj.xxOnSocketData;
obj.socket.onclose = obj.xxOnSocketClosed;
obj.socket.connect(obj.xxOnSocketConnected);
} else if (tls == false) {
obj.socket = new obj.net.Socket();
//obj.socket.setEncoding('binary');
obj.socket.connect(port, host, obj.xxOnSocketConnected);
obj.socket.on('data', obj.xxOnSocketData);
obj.socket.on('close', obj.xxOnSocketClosed);
obj.socket.on('error', obj.xxOnSocketClosed);
} else {
if (obj.xtlsoptions == null) { obj.xtlsoptions = { secureProtocol: 'TLSv1_method', ciphers: 'ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-SHA384:ECDHE-RSA-AES128-SHA256:RSA+AES:!aNULL:!MD5:!DSS', secureOptions: obj.constants.SSL_OP_NO_SSLv2 | obj.constants.SSL_OP_NO_SSLv3 | obj.constants.SSL_OP_NO_COMPRESSION | obj.constants.SSL_OP_CIPHER_SERVER_PREFERENCE, rejectUnauthorized: false }; }
obj.socket = obj.tls.connect(port, host, obj.xtlsoptions, obj.xxOnSocketConnected);
//obj.socket.setEncoding('binary');
obj.socket.on('data', obj.xxOnSocketData);
obj.socket.on('close', obj.xxOnSocketClosed);
obj.socket.on('error', obj.xxOnSocketClosed);
}
obj.xxStateChange(1);
}
// Get the certificate of Intel AMT
obj.getPeerCertificate = function () { if (obj.xtls == true) { return obj.socket.getPeerCertificate(); } return null; }
obj.xxOnSocketConnected = function () {
if (obj.socket == null) return;
if (!obj.xtlsoptions || !obj.xtlsoptions.meshServerConnect) {
if (obj.xtls == true) {
obj.xtlsCertificate = obj.socket.getPeerCertificate();
if ((obj.xtlsFingerprint != 0) && (obj.xtlsCertificate.fingerprint.split(':').join('').toLowerCase() != obj.xtlsFingerprint)) { obj.Stop(); return; }
}
}
if (urlvars && urlvars['redirtrace']) { console.log('REDIR-CONNECTED'); }
//obj.Debug('Socket Connected');
obj.xxStateChange(2);
if (obj.protocol == 1) obj.directSend(new Uint8Array([0x10, 0x00, 0x00, 0x00, 0x53, 0x4F, 0x4C, 0x20])); // SOL
if (obj.protocol == 2) obj.directSend(new Uint8Array([0x10, 0x01, 0x00, 0x00, 0x4b, 0x56, 0x4d, 0x52])); // KVM
if (obj.protocol == 3) obj.directSend(new Uint8Array([0x10, 0x00, 0x00, 0x00, 0x49, 0x44, 0x45, 0x52])); // IDER
}
obj.xxOnSocketData = function (data) {
if (!data || obj.connectstate == -1) return;
if (typeof(data)=='string') {data = new Buffer(data,'binary')}
// Redirection tracing
if (urlvars && urlvars['redirtrace']) {
var datastr = arrToStr(new Uint8Array(data));
console.log('REDIR-RECV(' + datastr.length + '): ' + rstr2hex(datastr));
}
//obj.inDataCount++;
data = new Uint8Array(data).buffer;
// KVM traffic, forward it directly.
if ((obj.connectstate == 1) && ((obj.protocol == 2) || (obj.protocol == 3))) {
return obj.m.ProcessBinaryData ? obj.m.ProcessBinaryData(data) : obj.m.ProcessData(arrToStr(new Uint8Array(data)));
}
// Append to accumulator
if (obj.acc == null) {
obj.acc = data;
} else {
var tmp = new Uint8Array(obj.acc.byteLength + data.byteLength);
tmp.set(new Uint8Array(obj.acc), 0);
tmp.set(new Uint8Array(data), obj.acc.byteLength);
obj.acc = tmp.buffer;
}
//console.log('Redir Recv', obj.acc);
while ((obj.acc != null) && (obj.acc.byteLength >= 1)) {
var cmdsize = 0, accArray = new Uint8Array(obj.acc);
switch (accArray[0]) {
case 0x11: // StartRedirectionSessionReply (17)
if (accArray.byteLength < 4) return;
var statuscode = accArray[1];
switch (statuscode) {
case 0: // STATUS_SUCCESS
if (accArray.byteLength < 13) return;
var oemlen = accArray[12];
if (accArray.byteLength < 13 + oemlen) return;
obj.directSend(new Uint8Array([0x13, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00])); // Query for available authentication
cmdsize = (13 + oemlen);
break;
default:
obj.disconnectCode = statuscode; // 2 = BUSY, 3 = UNSUPPORTED, 0xFF = ERROR.
obj.Stop(1);
break;
}
break;
case 0x14: // AuthenticateSessionReply (20)
if (accArray.byteLength < 9) return;
var authDataLen = new DataView(obj.acc).getUint32(5, true);
if (accArray.byteLength < 9 + authDataLen) return;
var status = accArray[1], authType = accArray[4], authData = [];
for (i = 0; i < authDataLen; i++) { authData.push(accArray[9 + i]); }
var authDataBuf = new Uint8Array(obj.acc.slice(9, 9 + authDataLen));
cmdsize = 9 + authDataLen;
if (authType == 0) {
// ###BEGIN###{Mode-NodeWebkit}
if (obj.user == '*') {
if (authData.indexOf(2) >= 0) {
// Kerberos Auth
var ticket;
if (kerberos && kerberos != null) {
var ticketReturn = kerberos.getTicket('HTTP' + ((obj.tls == 1)?'S':'') + '/' + ((obj.pass == '') ? (obj.host + ':' + obj.port) : obj.pass));
if (ticketReturn.returnCode == 0 || ticketReturn.returnCode == 0x90312) {
ticket = ticketReturn.ticket;
if (process.platform.indexOf('win') >= 0) {
// Clear kerberos tickets on both 32 and 64bit Windows platforms
try { require('child_process').exec('%windir%\\system32\\klist purge', function (error, stdout, stderr) { if (error) { require('child_process').exec('%windir%\\sysnative\\klist purge', function (error, stdout, stderr) { if (error) { console.error('Unable to purge kerberos tickets'); } }); } }); } catch (e) { console.log(e); }
}
} else {
console.error('Unexpected Kerberos error code: ' + ticketReturn.returnCode);
}
}
if (ticket) {
obj.xxSend(String.fromCharCode(0x13, 0x00, 0x00, 0x00, 0x02) + IntToStrX(ticket.length) + ticket);
} else {
obj.Stop(2);
}
}
else obj.Stop(2);
} else {
// ###END###{Mode-NodeWebkit}
// Query
if (authData.indexOf(4) >= 0) {
// Good Digest Auth (With cnonce and all)
obj.xxSend(String.fromCharCode(0x13, 0x00, 0x00, 0x00, 0x04) + IntToStrX(obj.user.length + obj.authuri.length + 8) + String.fromCharCode(obj.user.length) + obj.user + String.fromCharCode(0x00, 0x00) + String.fromCharCode(obj.authuri.length) + obj.authuri + String.fromCharCode(0x00, 0x00, 0x00, 0x00));
}
/*
else if (authData.indexOf(3) >= 0) {
// Bad Digest Auth (Not sure why this is supported, cnonce is not used!)
obj.xxSend(String.fromCharCode(0x13, 0x00, 0x00, 0x00, 0x03) + IntToStrX(obj.user.length + obj.authuri.length + 7) + String.fromCharCode(obj.user.length) + obj.user + String.fromCharCode(0x00, 0x00) + String.fromCharCode(obj.authuri.length) + obj.authuri + String.fromCharCode(0x00, 0x00, 0x00));
}
else if (authData.indexOf(1) >= 0) {
// Basic Auth (Probably a good idea to not support this unless this is an old version of Intel AMT)
obj.xxSend(String.fromCharCode(0x13, 0x00, 0x00, 0x00, 0x01) + IntToStrX(obj.user.length + obj.pass.length + 2) + String.fromCharCode(obj.user.length) + obj.user + String.fromCharCode(obj.pass.length) + obj.pass);
}
*/
else obj.Stop(2);
// ###BEGIN###{Mode-NodeWebkit}
}
// ###END###{Mode-NodeWebkit}
} else if (((authType == 3) || (authType == 4)) && (status == 1)) {
var curptr = 0;
// Realm
var realmlen = authDataBuf[curptr];
var realm = arrToStr(new Uint8Array(authDataBuf.buffer.slice(curptr + 1, curptr + 1 + realmlen)));
curptr += (realmlen + 1);
// Nonce
var noncelen = authDataBuf[curptr];
var nonce = arrToStr(new Uint8Array(authDataBuf.buffer.slice(curptr + 1, curptr + 1 + noncelen)));
curptr += (noncelen + 1);
// QOP
var qoplen = 0;
var qop = null;
var cnonce = randomHex(32);
var snc = '00000002';
var extra = '';
if (authType == 4) {
qoplen = authDataBuf[curptr];
qop = arrToStr(new Uint8Array(authDataBuf.buffer.slice(curptr + 1, curptr + 1 + qoplen)));
curptr += (qoplen + 1);
extra = snc + ':' + cnonce + ':' + qop + ':';
}
var digest = hex_md5(hex_md5(obj.user + ':' + realm + ':' + obj.pass) + ':' + nonce + ':' + extra + hex_md5('POST:' + obj.authuri));
var totallen = obj.user.length + realm.length + nonce.length + obj.authuri.length + cnonce.length + snc.length + digest.length + 7;
if (authType == 4) totallen += (qop.length + 1);
var buf = String.fromCharCode(0x13, 0x00, 0x00, 0x00, authType) + IntToStrX(totallen) + String.fromCharCode(obj.user.length) + obj.user + String.fromCharCode(realm.length) + realm + String.fromCharCode(nonce.length) + nonce + String.fromCharCode(obj.authuri.length) + obj.authuri + String.fromCharCode(cnonce.length) + cnonce + String.fromCharCode(snc.length) + snc + String.fromCharCode(digest.length) + digest;
if (authType == 4) buf += (String.fromCharCode(qop.length) + qop);
obj.xxSend(buf);
} else if (status == 0) { // Success
switch (obj.protocol) {
case 1: {
// Serial-over-LAN: Send Intel AMT serial settings...
var MaxTxBuffer = 10000;
var TxTimeout = 100;
var TxOverflowTimeout = 0;
var RxTimeout = 10000;
var RxFlushTimeout = 100;
var Heartbeat = 0;//5000;
obj.xxSend(String.fromCharCode(0x20, 0x00, 0x00, 0x00) + IntToStrX(obj.amtsequence++) + ShortToStrX(MaxTxBuffer) + ShortToStrX(TxTimeout) + ShortToStrX(TxOverflowTimeout) + ShortToStrX(RxTimeout) + ShortToStrX(RxFlushTimeout) + ShortToStrX(Heartbeat) + IntToStrX(0));
break;
}
case 2: {
// Remote Desktop: Send traffic directly...
obj.directSend(new Uint8Array([0x40, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00]));
break;
}
case 3: {
// Remote IDER: Send traffic directly...
obj.connectstate = 1;
obj.xxStateChange(3);
break;
}
}
} else obj.Stop(3);
break;
case 0x21: // Response to settings (33)
if (accArray.byteLength < 23) break;
cmdsize = 23;
obj.xxSend(String.fromCharCode(0x27, 0x00, 0x00, 0x00) + IntToStrX(obj.amtsequence++) + String.fromCharCode(0x00, 0x00, 0x1B, 0x00, 0x00, 0x00));
if (obj.protocol == 1) { obj.amtkeepalivetimer = setInterval(obj.xxSendAmtKeepAlive, 2000); }
obj.connectstate = 1;
obj.xxStateChange(3);
break;
case 0x29: // Serial Settings (41)
if (accArray.byteLength < 10) break;
cmdsize = 10;
break;
case 0x2A: // Incoming display data (42)
if (accArray.byteLength < 10) break;
var cs = (10 + (accArray[9] << 8) + accArray[8]);
if (accArray.byteLength < cs) break;
if (obj.m.ProcessBinaryData) { obj.m.ProcessBinaryData(obj.acc.slice(10, cs)); } else { obj.m.ProcessData(arrToStr(new Uint8Array(obj.acc.slice(10, cs)))); }
cmdsize = cs;
break;
case 0x2B: // Keep alive message (43)
if (accArray.byteLength < 8) break;
cmdsize = 8;
break;
case 0x41:
if (accArray.byteLength < 8) break;
obj.connectstate = 1;
obj.m.Start();
// KVM traffic, forward rest of accumulator directly.
if (accArray.byteLength > 8) { if (obj.m.ProcessBinaryData) { obj.m.ProcessBinaryData(obj.acc.slice(8)); } else { obj.m.ProcessData(arrToStr(new Uint8Array(obj.acc.slice(8)))); } }
cmdsize = accArray.byteLength;
break;
case 0xF0:
// console.log('Session is being recorded');
obj.serverIsRecording = true;
cmdsize = 1;
break;
default:
console.log('Unknown Intel AMT command: ' + accArray[0] + ' acclen=' + accArray.byteLength);
obj.Stop(4);
return;
}
if (cmdsize == 0) return;
if (cmdsize != obj.acc.byteLength) { obj.acc = obj.acc.slice(cmdsize); } else { obj.acc = null; }
}
}
obj.directSend = function (arr) {
// Redirection tracing
if (urlvars && urlvars['redirtrace']) {
var datastr = arrToStr(new Uint8Array(arr));
console.log('REDIR-DSEND(' + datastr.length + '): ' + rstr2hex(datastr));
}
try { obj.socket.write(new Buffer(arr)); } catch (ex) { console.log(ex); }
}
obj.xxSend = function (x) {
if (urlvars && urlvars['redirtrace']) { console.log('REDIR-SEND(' + x.length + '): ' + rstr2hex(x)); }
//obj.Debug('Send(' + x.length + '): ' + rstr2hex(x));
obj.socket.write(new Buffer(x, 'binary'));
}
obj.Send = obj.send = function (x) {
if (obj.socket == null || obj.connectstate != 1) return;
if (obj.protocol == 1) { obj.xxSend(String.fromCharCode(0x28, 0x00, 0x00, 0x00) + ToIntStr(obj.amtsequence++) + ToShortStr(x.length) + x); } else { obj.xxSend(x); }
}
obj.xxSendAmtKeepAlive = function () {
if (obj.socket == null) return;
obj.xxSend(String.fromCharCode(0x2B, 0x00, 0x00, 0x00) + ToIntStr(obj.amtsequence++));
}
obj.xxOnSocketClosed = function () {
if (urlvars && urlvars['redirtrace']) { console.log('REDIR-CLOSED'); }
//obj.Debug('Socket Closed');
obj.Stop();
}
obj.xxStateChange = function(newstate) {
if (obj.State == newstate) return;
obj.State = newstate;
obj.m.xxStateChange(obj.State);
if (obj.onStateChanged != null) obj.onStateChanged(obj, obj.State);
}
obj.Stop = function () {
if (urlvars && urlvars['redirtrace']) { console.log('REDIR-CLOSED'); }
//obj.Debug('Socket Stopped');
obj.xxStateChange(0);
obj.connectstate = -1;
obj.amtaccumulator = '';
if (obj.socket != null) { obj.socket.destroy(); obj.socket = null; }
if (obj.amtkeepalivetimer != null) { clearInterval(obj.amtkeepalivetimer); obj.amtkeepalivetimer = null; }
}
return obj;
}
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