90 lines
3.5 KiB
JavaScript
90 lines
3.5 KiB
JavaScript
/**
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* @description Meshcentral Intel AMT Local Scanner
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* @author Ylian Saint-Hilaire & Joko Sastriawan
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* @version v0.0.1
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*/
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// Construct a Intel AMT Scanner object
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function AMTScanner() {
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var emitterUtils = require('events').inherits(this);
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emitterUtils.createEvent('found');
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this.dgram = require('dgram');
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this.buildRmcpPing = function (tag) {
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var packet = Buffer.from('06000006000011BE80000000', 'hex');
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packet[9] = tag;
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return packet;
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};
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this.parseRmcpPacket = function (server, data, rinfo, func) {
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if (data == null || data.length < 20) return;
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var res = {};
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if (((data[12] == 0) || (data[13] != 0) || (data[14] != 1) || (data[15] != 0x57)) && (data[21] & 32)) {
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res.servertag = data[9];
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res.minorVersion = data[18] & 0x0F;
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res.majorVersion = (data[18] >> 4) & 0x0F;
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res.provisioningState = data[19] & 0x03; // Pre = 0, In = 1, Post = 2
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var openPort = (data[16] * 256) + data[17];
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var dualPorts = ((data[19] & 0x04) != 0) ? true : false;
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res.openPorts = [openPort];
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res.address = rinfo.address;
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if (dualPorts == true) { res.openPorts = [16992, 16993]; }
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if (func !== undefined) {
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func(server, res);
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}
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}
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}
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this.parseIPv4Range = function (range) {
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if (range == undefined || range == null) return null;
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var x = range.split('-');
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if (x.length == 2) { return { min: this.parseIpv4Addr(x[0]), max: this.parseIpv4Addr(x[1]) }; }
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x = range.split('/');
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if (x.length == 2) {
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var ip = this.parseIpv4Addr(x[0]), masknum = parseInt(x[1]), mask = 0;
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if (masknum <= 16 || masknum > 32) return null;
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masknum = 32 - masknum;
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for (var i = 0; i < masknum; i++) { mask = (mask << 1); mask++; }
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return { min: ip & (0xFFFFFFFF - mask), max: (ip & (0xFFFFFFFF - mask)) + mask };
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}
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x = this.parseIpv4Addr(range);
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if (x == null) return null;
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return { min: x, max: x };
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};
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// Parse IP address. Takes a
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this.parseIpv4Addr = function (addr) {
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var x = addr.split('.');
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if (x.length == 4) { return (parseInt(x[0]) << 24) + (parseInt(x[1]) << 16) + (parseInt(x[2]) << 8) + (parseInt(x[3]) << 0); }
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return null;
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}
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// IP address number to string
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this.IPv4NumToStr = function (num) {
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return ((num >> 24) & 0xFF) + '.' + ((num >> 16) & 0xFF) + '.' + ((num >> 8) & 0xFF) + '.' + (num & 0xFF);
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}
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this.scan = function (rangestr, timeout) {
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var iprange = this.parseIPv4Range(rangestr);
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var rmcp = this.buildRmcpPing(0);
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var server = this.dgram.createSocket({ type: 'udp4' });
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server.parent = this;
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server.scanResults = [];
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server.on('error', function (err) { console.log('Error:' + err); });
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server.on('message', function (msg, rinfo) { if (rinfo.size > 4) { this.parent.parseRmcpPacket(this, msg, rinfo, function (s, res) { s.scanResults.push(res); }) }; });
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server.on('listening', function () { for (var i = iprange.min; i <= iprange.max; i++) { server.send(rmcp, 623, server.parent.IPv4NumToStr(i)); } });
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server.bind({ address: '0.0.0.0', port: 0, exclusive: true });
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var tmout = setTimeout(function cb() {
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//console.log("Server closed");
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server.close();
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server.parent.emit('found', server.scanResults);
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delete server;
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}, timeout);
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};
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}
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module.exports = AMTScanner;
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