| 1 | /** |
| 2 | * @description Intel AMT Redirection Transport Module - using Node |
| 3 | * @author Ylian Saint-Hilaire |
| 4 | * @version v0.0.1f |
| 5 | */ |
| 6 | |
| 7 | // Construct a MeshServer object |
| 8 | module.exports = function CreateAmtRedirect(module) { |
| 9 | var obj = {}; |
| 10 | obj.m = module; // This is the inner module (Terminal or Desktop) |
| 11 | module.parent = obj; |
| 12 | obj.State = 0; |
| 13 | obj.net = require('net'); |
| 14 | obj.tls = require('tls'); |
| 15 | obj.socket = null; |
| 16 | obj.host = null; |
| 17 | obj.port = 0; |
| 18 | obj.user = null; |
| 19 | obj.pass = null; |
| 20 | obj.connectstate = 0; |
| 21 | obj.protocol = module.protocol; // 1 = SOL, 2 = KVM, 3 = IDER |
| 22 | obj.xtlsoptions = null; |
| 23 | |
| 24 | obj.amtaccumulator = Buffer.alloc(0); |
| 25 | obj.amtsequence = 1; |
| 26 | obj.amtkeepalivetimer = null; |
| 27 | obj.authuri = '/RedirectionService'; |
| 28 | obj.digestRealmMatch = null; |
| 29 | |
| 30 | obj.onStateChanged = null; |
| 31 | |
| 32 | // Private method |
| 33 | obj.Debug = function (msg) { console.log(msg); } |
| 34 | var urlvars = null; |
| 35 | |
| 36 | obj.Start = function (host, port, user, pass, tls, tlsFingerprint, tlsoptions) { |
| 37 | obj.host = host; |
| 38 | obj.port = port; |
| 39 | obj.user = user; |
| 40 | obj.pass = pass; |
| 41 | obj.xtls = tls; |
| 42 | obj.xtlsoptions = tlsoptions; |
| 43 | obj.xtlsFingerprint = tlsFingerprint; |
| 44 | obj.connectstate = 0; |
| 45 | |
| 46 | if (tls == true) { |
| 47 | obj.socket = obj.tls.connect({ host: host, port: port, rejectUnauthorized: false, checkServerIdentity: obj.onCheckServerIdentity }, obj.xxOnSocketConnected); |
| 48 | } else { |
| 49 | obj.socket = obj.net.createConnection({ host: host, port: port }, obj.xxOnSocketConnected); |
| 50 | } |
| 51 | obj.socket.on('data', obj.xxOnSocketData); |
| 52 | obj.socket.on('close', obj.xxOnSocketClosed); |
| 53 | obj.socket.on('error', obj.xxOnSocketClosed); |
| 54 | obj.xxStateChange(1); |
| 55 | } |
| 56 | |
| 57 | // Get the certificate of Intel AMT |
| 58 | //obj.getPeerCertificate = function () { if (obj.xtls == true) { return obj.socket.getPeerCertificate(); } return null; } |
| 59 | |
| 60 | obj.onCheckServerIdentity = function (cert) { |
| 61 | var f = cert[0].fingerprint.split(':').join('').toLowerCase(); |
| 62 | if ((obj.xtlsFingerprint != null) && (obj.xtlsFingerprint != f)) { |
| 63 | console.log('Invalid TLS Cert, SHA384: ' + f); |
| 64 | process.exit(2); |
| 65 | return; |
| 66 | } else { |
| 67 | if (obj.xtlsFingerprint == null) { |
| 68 | obj.xtlsFingerprint = f; |
| 69 | console.log('TLS Cert SHA384: ' + f); |
| 70 | } |
| 71 | } |
| 72 | } |
| 73 | |
| 74 | obj.xxOnSocketConnected = function () { |
| 75 | if (obj.socket == null) return; |
| 76 | /* |
| 77 | if (obj.xtls == true) { |
| 78 | obj.xtlsCertificate = obj.socket.getPeerCertificate(); |
| 79 | if ((obj.xtlsFingerprint != 0) && (obj.xtlsCertificate.fingerprint.split(':').join('').toLowerCase() != obj.xtlsFingerprint)) { obj.Stop(); return; } |
| 80 | } |
| 81 | */ |
| 82 | |
| 83 | if (urlvars && urlvars['redirtrace']) { console.log('REDIR-CONNECTED'); } |
| 84 | //obj.Debug("Socket Connected"); |
| 85 | obj.xxStateChange(2); |
| 86 | if (obj.protocol == 1) obj.xxSend(obj.RedirectStartSol); // TODO: Put these strings in higher level module to tighten code |
| 87 | else if (obj.protocol == 2) obj.xxSend(obj.RedirectStartKvm); // Don't need these is the feature if not compiled-in. |
| 88 | else if (obj.protocol == 3) obj.xxSend(obj.RedirectStartIder); |
| 89 | } |
| 90 | |
| 91 | obj.xxOnSocketData = function (data) { |
| 92 | if (!data || obj.connectstate == -1) return; |
| 93 | if (urlvars && urlvars['redirtrace']) { console.log('REDIR-RECV(' + data.length + '): ' + data.toString('hex')); } |
| 94 | //obj.Debug("Recv(" + data.length + "): " + rstr2hex(data)); |
| 95 | if ((obj.protocol == 2 || obj.protocol == 3) && obj.connectstate == 1) { return obj.m.ProcessData(data); } // KVM or IDER traffic, forward it directly. |
| 96 | obj.amtaccumulator = Buffer.concat([obj.amtaccumulator, data]); |
| 97 | //obj.Debug("Recv(" + obj.amtaccumulator.length + "): " + obj.amtaccumulator.toString('hex')); |
| 98 | |
| 99 | while (obj.amtaccumulator.length > 0) { |
| 100 | var cmdsize = 0; |
| 101 | //console.log('CMD: ' + obj.amtaccumulator[0]); |
| 102 | switch (obj.amtaccumulator[0]) { |
| 103 | case 0x11: // StartRedirectionSessionReply (17) |
| 104 | if (obj.amtaccumulator.length < 4) return; |
| 105 | var statuscode = obj.amtaccumulator[1]; |
| 106 | switch (statuscode) { |
| 107 | case 0: // STATUS_SUCCESS |
| 108 | if (obj.amtaccumulator.length < 13) return; |
| 109 | var oemlen = obj.amtaccumulator[12]; |
| 110 | if (obj.amtaccumulator.length < 13 + oemlen) return; |
| 111 | obj.xxSend(String.fromCharCode(0x13, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00)); // Query authentication support |
| 112 | cmdsize = (13 + oemlen); |
| 113 | break; |
| 114 | default: |
| 115 | obj.Stop(); |
| 116 | break; |
| 117 | } |
| 118 | break; |
| 119 | case 0x14: // AuthenticateSessionReply (20) |
| 120 | if (obj.amtaccumulator.length < 9) return; |
| 121 | var authDataLen = obj.amtaccumulator.readInt32LE(5); |
| 122 | if (obj.amtaccumulator.length < 9 + authDataLen) return; |
| 123 | var status = obj.amtaccumulator[1]; |
| 124 | var authType = obj.amtaccumulator[4]; |
| 125 | var authData = []; |
| 126 | for (i = 0; i < authDataLen; i++) { authData.push(obj.amtaccumulator[9 + i]); } |
| 127 | var authDataBuf = obj.amtaccumulator.slice(9, 9 + authDataLen); |
| 128 | cmdsize = 9 + authDataLen; |
| 129 | if (authType == 0) { |
| 130 | // Query |
| 131 | if (authData.indexOf(4) >= 0) { |
| 132 | // Good Digest Auth (With cnonce and all) |
| 133 | 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)); |
| 134 | } |
| 135 | /* |
| 136 | else if (authData.indexOf(3) >= 0) { |
| 137 | // Bad Digest Auth (Not sure why this is supported, cnonce is not used!) |
| 138 | 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)); |
| 139 | } |
| 140 | else if (authData.indexOf(1) >= 0) { |
| 141 | // Basic Auth (Probably a good idea to not support this unless this is an old version of Intel AMT) |
| 142 | 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); |
| 143 | } |
| 144 | */ |
| 145 | else obj.Stop(); |
| 146 | } |
| 147 | else if ((authType == 3 || authType == 4) && status == 1) { |
| 148 | var curptr = 0; |
| 149 | |
| 150 | // Realm |
| 151 | var realmlen = authDataBuf[curptr]; |
| 152 | var realm = authDataBuf.slice(curptr + 1, curptr + 1 + realmlen).toString(); |
| 153 | curptr += (realmlen + 1); |
| 154 | |
| 155 | // Check the digest realm. If it does not match, close the connection. |
| 156 | if (obj.digestRealmMatch && (obj.digestRealmMatch != realm)) { obj.Stop(); return; } |
| 157 | |
| 158 | // Nonce |
| 159 | var noncelen = authDataBuf[curptr]; |
| 160 | var nonce = authDataBuf.slice(curptr + 1, curptr + 1 + noncelen).toString(); |
| 161 | curptr += (noncelen + 1); |
| 162 | |
| 163 | // QOP |
| 164 | var qoplen = 0; |
| 165 | var qop = null; |
| 166 | var cnonce = obj.xxRandomValueHex(32); |
| 167 | var snc = '00000002'; |
| 168 | var extra = ''; |
| 169 | if (authType == 4) { |
| 170 | qoplen = authDataBuf[curptr]; |
| 171 | qop = authDataBuf.slice(curptr + 1, curptr + 1 + qoplen).toString(); |
| 172 | curptr += (qoplen + 1); |
| 173 | extra = snc + ':' + cnonce + ':' + qop + ':'; |
| 174 | } |
| 175 | var digest = hex_md5(hex_md5(obj.user + ':' + realm + ':' + obj.pass) + ':' + nonce + ':' + extra + hex_md5('POST:' + obj.authuri)); |
| 176 | var totallen = obj.user.length + realm.length + nonce.length + obj.authuri.length + cnonce.length + snc.length + digest.length + 7; |
| 177 | if (authType == 4) totallen += (qop.length + 1); |
| 178 | var buf = Buffer.concat([new Buffer([0x13, 0x00, 0x00, 0x00, authType]), new Buffer([totallen & 0xFF, (totallen >> 8) & 0xFF, 0x00, 0x00]), new Buffer([obj.user.length]), new Buffer(obj.user), new Buffer([realm.length]), new Buffer(realm), new Buffer([nonce.length]), new Buffer(nonce), new Buffer([obj.authuri.length]), new Buffer(obj.authuri), new Buffer([cnonce.length]), new Buffer(cnonce), new Buffer([snc.length]), new Buffer(snc), new Buffer([digest.length]), new Buffer(digest)]); |
| 179 | if (authType == 4) buf = Buffer.concat([buf, new Buffer([qop.length]), new Buffer(qop) ]); |
| 180 | obj.xxSend(buf); |
| 181 | } |
| 182 | else if (status == 0) { // Success |
| 183 | if (obj.protocol == 1) { |
| 184 | // Serial-over-LAN: Send Intel AMT serial settings... |
| 185 | var MaxTxBuffer = 10000; |
| 186 | var TxTimeout = 100; |
| 187 | var TxOverflowTimeout = 0; |
| 188 | var RxTimeout = 10000; |
| 189 | var RxFlushTimeout = 100; |
| 190 | var Heartbeat = 0;//5000; |
| 191 | obj.xxSend(String.fromCharCode(0x20, 0x00, 0x00, 0x00) + ToIntStr(obj.amtsequence++) + ToShortStr(MaxTxBuffer) + ToShortStr(TxTimeout) + ToShortStr(TxOverflowTimeout) + ToShortStr(RxTimeout) + ToShortStr(RxFlushTimeout) + ToShortStr(Heartbeat) + ToIntStr(0)); |
| 192 | } |
| 193 | if (obj.protocol == 2) { |
| 194 | // Remote Desktop: Send traffic directly... |
| 195 | obj.xxSend(new Buffer([0x40, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00])); |
| 196 | } |
| 197 | if (obj.protocol == 3) { |
| 198 | // Remote IDER: Send traffic directly... |
| 199 | obj.connectstate = 1; |
| 200 | obj.xxStateChange(3); |
| 201 | } |
| 202 | } else obj.Stop(); |
| 203 | break; |
| 204 | case 0x21: // Response to settings (33) |
| 205 | if (obj.amtaccumulator.length < 23) break; |
| 206 | cmdsize = 23; |
| 207 | obj.xxSend(String.fromCharCode(0x27, 0x00, 0x00, 0x00) + ToIntStr(obj.amtsequence++) + String.fromCharCode(0x00, 0x00, 0x1B, 0x00, 0x00, 0x00)); |
| 208 | if (obj.protocol == 1) { obj.amtkeepalivetimer = setInterval(obj.xxSendAmtKeepAlive, 2000); } |
| 209 | obj.connectstate = 1; |
| 210 | obj.xxStateChange(3); |
| 211 | break; |
| 212 | case 0x29: // Serial Settings (41) |
| 213 | if (obj.amtaccumulator.length < 10) break; |
| 214 | cmdsize = 10; |
| 215 | break; |
| 216 | case 0x2A: // Incoming display data (42) |
| 217 | if (obj.amtaccumulator.length < 10) break; |
| 218 | var cs = (10 + ((obj.amtaccumulator[9] & 0xFF) << 8) + (obj.amtaccumulator[8] & 0xFF)); |
| 219 | if (obj.amtaccumulator.length < cs) break; |
| 220 | obj.m.ProcessData(obj.amtaccumulator.slice(10, cs)); |
| 221 | cmdsize = cs; |
| 222 | break; |
| 223 | case 0x2B: // Keep alive message (43) |
| 224 | if (obj.amtaccumulator.length < 8) break; |
| 225 | cmdsize = 8; |
| 226 | break; |
| 227 | case 0x41: |
| 228 | if (obj.amtaccumulator.length < 8) break; |
| 229 | obj.connectstate = 1; |
| 230 | obj.m.Start(); |
| 231 | // KVM traffic, forward rest of accumulator directly. |
| 232 | if (obj.amtaccumulator.length > 8) { obj.m.ProcessData(obj.amtaccumulator.substring(8)); } |
| 233 | cmdsize = obj.amtaccumulator.length; |
| 234 | break; |
| 235 | default: |
| 236 | console.log('Unknown Intel AMT command: ' + obj.amtaccumulator[0] + ' acclen=' + obj.amtaccumulator.length); |
| 237 | obj.Stop(); |
| 238 | return; |
| 239 | } |
| 240 | if (cmdsize == 0) return; |
| 241 | obj.amtaccumulator = obj.amtaccumulator.slice(cmdsize); |
| 242 | } |
| 243 | } |
| 244 | |
| 245 | obj.xxSend = function (x) { |
| 246 | if (urlvars && urlvars['redirtrace']) { console.log('REDIR-SEND(' + x.length + '): ' + rstr2hex(x)); } |
| 247 | //obj.Debug('Send(' + x.length + '): ' + Buffer.from(x, 'binary').toString('hex')); |
| 248 | if (typeof x == 'string') { obj.socket.write(Buffer.from(x, 'binary')); } else { obj.socket.write(x); } |
| 249 | } |
| 250 | |
| 251 | // Send Serial-over-LAN ASCII characters |
| 252 | obj.Send = function (x) { |
| 253 | if (obj.socket == null || obj.connectstate != 1) return; |
| 254 | if (obj.protocol == 1) { obj.xxSend(String.fromCharCode(0x28, 0x00, 0x00, 0x00) + ToIntStr(obj.amtsequence++) + ToShortStr(x.length) + x); } else { obj.xxSend(x); } |
| 255 | } |
| 256 | |
| 257 | obj.xxSendAmtKeepAlive = function () { |
| 258 | if (obj.socket == null) return; |
| 259 | obj.xxSend(String.fromCharCode(0x2B, 0x00, 0x00, 0x00) + ToIntStr(obj.amtsequence++)); |
| 260 | } |
| 261 | |
| 262 | // Uses OpenSSL random to generate a hex string |
| 263 | obj.xxRandomValueHex = function (len) { |
| 264 | var t = [], l = Math.floor(len / 2); |
| 265 | for (var i = 0; i < l; i++) { t.push(obj.tls.generateRandomInteger('0', '255')); } |
| 266 | return new Buffer(t).toString('hex'); |
| 267 | } |
| 268 | |
| 269 | obj.xxOnSocketClosed = function () { |
| 270 | obj.socket = null; |
| 271 | if (urlvars && urlvars['redirtrace']) { console.log('REDIR-CLOSED'); } |
| 272 | //obj.Debug('Socket Closed'); |
| 273 | obj.Stop(); |
| 274 | } |
| 275 | |
| 276 | obj.xxStateChange = function(newstate) { |
| 277 | if (obj.State == newstate) return; |
| 278 | obj.State = newstate; |
| 279 | obj.m.xxStateChange(obj.State); |
| 280 | if (obj.onStateChanged != null) obj.onStateChanged(obj, obj.State); |
| 281 | } |
| 282 | |
| 283 | obj.Stop = function () { |
| 284 | if (urlvars && urlvars['redirtrace']) { console.log('REDIR-CLOSED'); } |
| 285 | //obj.Debug('Socket Stopped'); |
| 286 | obj.xxStateChange(0); |
| 287 | obj.connectstate = -1; |
| 288 | obj.amtaccumulator = Buffer.alloc(0); |
| 289 | if (obj.socket != null) { obj.socket.destroy(); obj.socket = null; } |
| 290 | if (obj.amtkeepalivetimer != null) { clearInterval(obj.amtkeepalivetimer); obj.amtkeepalivetimer = null; } |
| 291 | } |
| 292 | |
| 293 | obj.RedirectStartSol = new Buffer([0x10, 0x00, 0x00, 0x00, 0x53, 0x4F, 0x4C, 0x20]); |
| 294 | obj.RedirectStartKvm = new Buffer([0x10, 0x01, 0x00, 0x00, 0x4b, 0x56, 0x4d, 0x52]); |
| 295 | obj.RedirectStartIder = new Buffer([0x10, 0x00, 0x00, 0x00, 0x49, 0x44, 0x45, 0x52]); |
| 296 | |
| 297 | return obj; |
| 298 | } |
| 299 | |
| 300 | function ToIntStr(v) { return String.fromCharCode((v & 0xFF), ((v >> 8) & 0xFF), ((v >> 16) & 0xFF), ((v >> 24) & 0xFF)); } |
| 301 | function ToShortStr(v) { return String.fromCharCode((v & 0xFF), ((v >> 8) & 0xFF)); } |
| 302 | |
| 303 | function ShortToStr(v) { return String.fromCharCode((v >> 8) & 0xFF, v & 0xFF); } |
| 304 | function ShortToStrX(v) { return String.fromCharCode(v & 0xFF, (v >> 8) & 0xFF); } |
| 305 | function IntToStr(v) { return String.fromCharCode((v >> 24) & 0xFF, (v >> 16) & 0xFF, (v >> 8) & 0xFF, v & 0xFF); } |
| 306 | function IntToStrX(v) { return String.fromCharCode(v & 0xFF, (v >> 8) & 0xFF, (v >> 16) & 0xFF, (v >> 24) & 0xFF); } |
| 307 | |
| 308 | var md5hasher = require('MD5Stream').create(); |
| 309 | function hex_md5(a) { return md5hasher.syncHash(a).toString('hex').toLowerCase(); } |