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MeshCentral/amthelloserver.js

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Started work on Intel AMT hello server.
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/**
* @description MeshCentral Intel AMT Hello server
* @author Ylian Saint-Hilaire
* @copyright Intel Corporation 2018-2021
* @license Apache-2.0
* @version v0.0.1
*/
/*xjslint node: true */
/*xjslint plusplus: true */
/*xjslint maxlen: 256 */
/*jshint node: true */
/*jshint strict: false */
/*jshint esversion: 6 */
"use strict";
// Construct the Intel AMT hello server. This is used for Intel AMT bare-metal activation on the local LAN.
// This server can receive a notification from Intel AMT and attempt activation.
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// In Intel documentation, this is called the Setup and Configuration Application (SCA)
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module.exports.CreateAmtHelloServer = function (parent, config) {
var obj = {};
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// WSMAN stack
const CreateWsmanComm = require('./amt/amt-wsman-comm');
const WsmanStackCreateService = require('./amt/amt-wsman');
const AmtStackCreateService = require('./amt/amt');
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// Start the Intel AMT hello server
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var port = 9971;
if (typeof config.port == 'number') { port = config.port; }
const net = require('net');
obj.server = net.createServer(function (socket) {
socket.ra = socket.remoteAddress;
socket.data = null;
socket.on('error', function (err) { })
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socket.on('close', function () { if (this.data != null) { processHelloData(this.data, this.ra); } delete this.ra; this.removeAllListeners(); })
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socket.on('data', function (data) {
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console.log('indata', data.toString('hex'));
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if (this.data == null) { this.data = data; } else { Buffer.concat([this.data, data]); }
var str = this.data.toString();
if (str.startsWith('GET ') && (str.indexOf('\r\n\r\n') >= 0)) {
this.data = null;
var content = "<!DOCTYPE html><html><head><meta charset=\"UTF-8\"><title>Intel&reg; AMT Hello Server</title></head><body>Intel AMT hello server.<br />Intel&reg; AMT devices should send notification to this port for activation.</body></html>";
try { socket.end('HTTP/1.1 200 OK\r\nContent-Type: text/html\r\nContent-Length: ' + content.length + '\r\nConnection: close\r\n\r\n' + content); } catch (ex) {}
} else if (this.data.length > 16000) {
try { this.end(); } catch (ex) { };
}
})
});
obj.server.listen(port);
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console.log('MeshCentral Intel(R) AMT provisioning server running on port ' + port + '.');
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// Example hello data for testing
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//setTimeout(function () { processHelloData(Buffer.from('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', 'hex'), '192.168.2.148'); }, 500);
setTimeout(function () { processHelloData(Buffer.from('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', 'hex'), '192.168.2.148'); }, 500);
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// Parse Intel AMT hello data
function parseHelloData(data, addr) {
try {
if (addr.startsWith('::ffff:')) { addr = addr.substring(7); }
var amtHello = { time: Date.now(), addr: addr };
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// Decode header
if (data.length < 25) return; // Invalid data
const firstBytes = data.readInt16LE(0);
if (firstBytes > 1) return; // Invalid data
amtHello.adminCredentialsSet = (firstBytes != 0);
amtHello.version = data.readInt16LE(2);
if (amtHello.version != 3) return null; // One touch PID not supported, only version 3 supported.
amtHello.retryCount = data.readInt32LE(4);
amtHello.guidhex = data.slice(8, 24).toString('hex');
amtHello.guid = guidToStr(amtHello.guidhex);
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// Get the list of hashes
const hashCount = data[24];
amtHello.hashes = [];
var ptr = 25;
for (var i = 0; i < hashCount; i++)
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{
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const hashType = data[ptr]; // 1=SHA1 (20 byte hash); 2 = SHA256 (32 byte hash); 3 = SHA384 (48 byte hash)
const hashSize = data[ptr + 1];
if ((hashType < 1) || (hashType > 3)) return null; // Unexpected hash type
if ((hashType == 1) && (hashSize != 20)) return null; // Unexpected SHA1 hash size
if ((hashType == 2) && (hashSize != 32)) return null; // Unexpected SHA256 hash size
if ((hashType == 3) && (hashSize != 48)) return null; // Unexpected SHA384 hash size
const hash = data.slice(ptr + 2, ptr + 2 + hashSize);
amtHello.hashes.push(hash.toString('hex'));
ptr += (hashSize + 2);
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}
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if (amtHello.hashes.length != hashCount) return null; // Unexpected number of hashes
return amtHello; // Everything looks good.
} catch (ex) { return null; }
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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); }
function strToGuid(s) { s = s.replace(/-/g, ''); var ret = s.substring(6, 8) + s.substring(4, 6) + s.substring(2, 4) + s.substring(0, 2) + s.substring(10, 12) + s.substring(8, 10) + s.substring(14, 16) + s.substring(12, 14) + s.substring(16, 20) + s.substring(20); return ret; }
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// Process incoming Intel AMT hello data
function processHelloData(data, addr) {
// Check if we can parse the incoming data
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const dev = parseHelloData(data, addr);
if (dev == null) { parent.debug('amtsca', addr, 'Got invalid hello from: ' + addr); return; } // Invalid Intel AMT hello
parent.debug('amtsca', 'Got hello from ' + addr);
// Get assumed trusted FQDN and device group
dev.trustedFqdn = config.trustedfqdn;
var mesh = parent.webserver.meshes[config.devicegroup];
if ((mesh == null) || (mesh.mtype !== 1) || (typeof mesh.amt !== 'object') || (typeof mesh.amt.type !== 'number')) { parent.debug('amtsca', addr, 'Invalid device group for Intel AMT activation.'); return; }
if ((mesh.amt.type != 3) && (mesh.amt.type != 4)) { parent.debug('amtsca', addr, 'Device group does not have ACM activation policy.'); return; }
dev.mesh = mesh;
dev.domainid = mesh.domain;
// Compute the nodeid for this device using the device GUID
const g = dev.guid.split('-').join('');
const id = Buffer.from(g + g + g, 'hex').toString('base64');
dev.nodeid = 'node/' + mesh.domain + '/' + id;
// Attempts reverse DNS loopup on the device IP address
const func = function dnsReverseLoopup(err, hostnames) {
var hostname = dnsReverseLoopup.addr;
if ((err == null) && (hostnames != null) && (hostnames.length > 0)) { hostname = hostnames[0]; }
dnsReverseLoopup.dev.hostname = hostname;
processHelloDataEx1(dnsReverseLoopup.dev);
}
func.addr = addr;
func.dev = dev;
require('dns').reverse(addr, func);
}
// Check if this device has any way to be activated in ACM using our server certificates.
function checkAcmActivation(hello) {
var domain = parent.config.domains[hello.domainid];
if ((domain == null) || (domain.amtacmactivation == null) || (domain.amtacmactivation.certs == null) || (domain.amtacmactivation.certs.length == 0)) return null;
const activationCerts = domain.amtacmactivation.certs;
// Get the trusted FQDN of the device
var trustedFqdn = hello.trustedFqdn;
// Find a matching certificate
for (var i in activationCerts) {
var cert = activationCerts[i];
if ((cert.cn == '*') || (cert.cn == trustedFqdn)) {
for (var j in hello.hashes) {
var hash = hello.hashes[j];
if (hash == cert.sha256) { return { cert: cert, fqdn: trustedFqdn, hash: cert.sha256 }; } // Found a match
else if (hash == cert.sha1) { return { cert: cert, fqdn: trustedFqdn, hash: cert.sha1 }; } // Found a match
}
}
}
return null; // Did not find a match
}
function processHelloDataEx1(dev) {
// Get an activation certificate chain
const certinfo = checkAcmActivation(dev);
if (certinfo == null) { parent.debug('amtsca', dev.hostname, 'Unable to find a matching ACM activation certificate.'); destroyDevice(dev); return; }
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var certchain = parent.certificateOperations.getAcmCertChain(parent.config.domains[dev.domainid], dev.trustedFqdn, certinfo.cert.sha256);
if (certchain == null) { parent.debug('amtsca', dev.hostname, 'Unable to create TLS certificate chain.'); destroyDevice(dev); return; }
dev.certchain = certchain;
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// Setup a connection to the Intel AMT device
parent.debug('amtsca', dev.hostname, 'Launching TLS connection...');
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var comm = CreateWsmanComm(dev.hostname, 16993, 'admin', '', 1, { cert: dev.certchain.certs.reverse().join(''), key: dev.certchain.signkey }); // Perform TLS connection
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comm.xtlsFingerprint = 0; // No Intel AMT certificate checking.
var wsstack = WsmanStackCreateService(comm);
dev.amtstack = AmtStackCreateService(wsstack);
dev.amtstack.dev = dev;
dev.amtstack.BatchEnum(null, ['*AMT_GeneralSettings', '*IPS_HostBasedSetupService'], processHelloDataEx2);
}
function processHelloDataEx2(stack, name, responses, status) {
const dev = stack.dev;
if (status != 200) { parent.debug('amtsca', dev.hostname, 'Failed TLS connection, status=' + status + '.'); destroyDevice(dev); return; }
parent.debug('amtsca', dev.hostname, 'Succesful TLS connection.');
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//console.log(JSON.stringify(dev.certinfo, null, 2));
console.log('processHelloDataEx2', status, responses);
// TODO: Perform ACM activation
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}
// Do aggressive cleanup on the device
function destroyDevice(dev) {
if (dev.amtstack != null) { delete dev.amtstack.dev; delete dev.amtstack; }
delete dev.certinfo;
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}
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return obj;
};