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1 /*
2 Copyright 2018-2021 Intel Corporation
3
4 Licensed under the Apache License, Version 2.0 (the "License");
5 you may not use this file except in compliance with the License.
6 You may obtain a copy of the License at
7
8 http://www.apache.org/licenses/LICENSE-2.0
9
10 Unless required by applicable law or agreed to in writing, software
11 distributed under the License is distributed on an "AS IS" BASIS,
12 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 See the License for the specific language governing permissions and
14 limitations under the License.
15 */
16
17 /**
18 * @description Meshcentral Intel AMT Local Scanner
19 * @author Ylian Saint-Hilaire & Joko Sastriawan
20 * @version v0.0.1
21 */
22
23 // Construct a Intel AMT Scanner object
24
25 function AMTScanner() {
26 var emitterUtils = require('events').inherits(this);
27 emitterUtils.createEvent('found');
28
29 this.dgram = require('dgram');
30
31 this.buildRmcpPing = function (tag) {
32 var packet = Buffer.from('06000006000011BE80000000', 'hex');
33 packet[9] = tag;
34 return packet;
35 };
36
37 this.parseRmcpPacket = function (server, data, rinfo, func) {
38 if (data == null || data.length < 20) return;
39 var res = {};
40 if (((data[12] == 0) || (data[13] != 0) || (data[14] != 1) || (data[15] != 0x57)) && (data[21] & 32)) {
41 res.servertag = data[9];
42 res.minorVersion = data[18] & 0x0F;
43 res.majorVersion = (data[18] >> 4) & 0x0F;
44 res.provisioningState = data[19] & 0x03; // Pre = 0, In = 1, Post = 2
45
46 var openPort = (data[16] * 256) + data[17];
47 var dualPorts = ((data[19] & 0x04) != 0) ? true : false;
48 res.openPorts = [openPort];
49 res.address = rinfo.address;
50 if (dualPorts == true) { res.openPorts = [16992, 16993]; }
51 if (func !== undefined) {
52 func(server, res);
53 }
54 }
55 }
56
57 this.parseIPv4Range = function (range) {
58 if (range == undefined || range == null) return null;
59 var x = range.split('-');
60 if (x.length == 2) { return { min: this.parseIpv4Addr(x[0]), max: this.parseIpv4Addr(x[1]) }; }
61 x = range.split('/');
62 if (x.length == 2) {
63 var ip = this.parseIpv4Addr(x[0]), masknum = parseInt(x[1]), mask = 0;
64 if (masknum <= 16 || masknum > 32) return null;
65 masknum = 32 - masknum;
66 for (var i = 0; i < masknum; i++) { mask = (mask << 1); mask++; }
67 return { min: (ip & (0xFFFFFFFF - mask))+1, max: (ip & (0xFFFFFFFF - mask)) + mask -1 };//remove network and broadcast address to avoid irrecoverable socket error
68 }
69 x = this.parseIpv4Addr(range);
70 if (x == null) return null;
71 return { min: x, max: x };
72 };
73
74 // Parse IP address. Takes a
75 this.parseIpv4Addr = function (addr) {
76 var x = addr.split('.');
77 if (x.length == 4) { return (parseInt(x[0]) << 24) + (parseInt(x[1]) << 16) + (parseInt(x[2]) << 8) + (parseInt(x[3]) << 0); }
78 return null;
79 }
80
81 // IP address number to string
82 this.IPv4NumToStr = function (num) {
83 return ((num >> 24) & 0xFF) + '.' + ((num >> 16) & 0xFF) + '.' + ((num >> 8) & 0xFF) + '.' + (num & 0xFF);
84 }
85
86 this.scan = function (rangestr, timeout, callback) {
87 var iprange = this.parseIPv4Range(rangestr);
88 var rmcp = this.buildRmcpPing(0);
89 var server = this.dgram.createSocket({ type: 'udp4' });
90 server.parent = this;
91 server.scanResults = [];
92 server.on('error', function (err) { console.log('Error:' + err); });
93 server.on('message', function (msg, rinfo) { if (rinfo.size > 4) { this.parent.parseRmcpPacket(this, msg, rinfo, function (s, res) { s.scanResults.push(res); }) }; });
94 server.on('listening', function () { for (var i = iprange.min; i <= iprange.max; i++) {
95 server.send(rmcp, 623, server.parent.IPv4NumToStr(i)); } });
96 server.bind({ address: '0.0.0.0', port: 0, exclusive: true });
97 var tmout = setTimeout(function cb() {
98 //console.log("Server closed");
99 server.close();
100 if (callback) {
101 callback(server.scanResults);
102 }
103 server.parent.emit('found', server.scanResults);
104 delete server;
105 }, timeout);
106 };
107 }
108
109 module.exports = AMTScanner;