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'use strict';
// Original file https://raw.githubusercontent.com/elasticio/node-ntlm-client/master/lib/ntlm.js
var os = require('os'), flags = require('./flags'), hash = require('./hash');
var NTLMSIGNATURE = "NTLMSSP\0";
function createType1Message(workstation, target) {
var dataPos = 32, pos = 0, buf = new Buffer.alloc(1024);
workstation = workstation === undefined ? os.hostname() : workstation;
target = target === undefined ? '' : target;
//signature
buf.write(NTLMSIGNATURE, pos, NTLMSIGNATURE.length, 'ascii');
pos += NTLMSIGNATURE.length;
//message type
buf.writeUInt32LE(1, pos);
pos += 4;
//flags
buf.writeUInt32LE(flags.NTLMFLAG_NEGOTIATE_OEM |
flags.NTLMFLAG_REQUEST_TARGET |
flags.NTLMFLAG_NEGOTIATE_NTLM_KEY |
flags.NTLMFLAG_NEGOTIATE_NTLM2_KEY |
flags.NTLMFLAG_NEGOTIATE_ALWAYS_SIGN, pos);
pos += 4;
//domain security buffer
buf.writeUInt16LE(target.length, pos);
pos += 2;
buf.writeUInt16LE(target.length, pos);
pos += 2;
buf.writeUInt32LE(target.length === 0 ? 0 : dataPos, pos);
pos += 4;
if (target.length > 0) {
dataPos += buf.write(target, dataPos, 'ascii');
}
//workstation security buffer
buf.writeUInt16LE(workstation.length, pos);
pos += 2;
buf.writeUInt16LE(workstation.length, pos);
pos += 2;
buf.writeUInt32LE(workstation.length === 0 ? 0 : dataPos, pos);
pos += 4;
if (workstation.length > 0) {
dataPos += buf.write(workstation, dataPos, 'ascii');
}
return 'NTLM ' + buf.toString('base64', 0, dataPos);
}
function decodeType2Message(str) {
if (str === undefined) {
throw new Error('Invalid argument');
}
//convenience
if (Object.prototype.toString.call(str) !== '[object String]') {
if (str.hasOwnProperty('headers') && str.headers.hasOwnProperty('www-authenticate')) {
str = str.headers['www-authenticate'];
}
else {
throw new Error('Invalid argument');
}
}
var ntlmMatch = /^NTLM ([^,\s]+)/.exec(str);
if (ntlmMatch) {
str = ntlmMatch[1];
}
var buf = new Buffer.from(str, 'base64'), obj = {};
//check signature
if (buf.toString('ascii', 0, NTLMSIGNATURE.length) !== NTLMSIGNATURE) {
throw new Error('Invalid message signature: ' + str);
}
//check message type
if (buf.readUInt32LE(NTLMSIGNATURE.length) !== 2) {
throw new Error('Invalid message type (no type 2)');
}
//read flags
obj.flags = buf.readUInt32LE(20);
obj.encoding = (obj.flags & flags.NTLMFLAG_NEGOTIATE_OEM) ? 'ascii' : 'ucs2';
obj.version = (obj.flags & flags.NTLMFLAG_NEGOTIATE_NTLM2_KEY) ? 2 : 1;
obj.challenge = buf.slice(24, 32);
//read target name
obj.targetName = (function () {
var length = buf.readUInt16LE(12);
//skipping allocated space
var offset = buf.readUInt32LE(16);
if (length === 0) {
return '';
}
if ((offset + length) > buf.length || offset < 32) {
throw new Error('Bad type 2 message');
}
return buf.toString(obj.encoding, offset, offset + length);
})();
//read target info
if (obj.flags & flags.NTLMFLAG_NEGOTIATE_TARGET_INFO) {
obj.targetInfo = (function () {
var info = {};
var length = buf.readUInt16LE(40);
//skipping allocated space
var offset = buf.readUInt32LE(44);
var targetInfoBuffer = new Buffer.alloc(length);
buf.copy(targetInfoBuffer, 0, offset, offset + length);
if (length === 0) {
return info;
}
if ((offset + length) > buf.length || offset < 32) {
throw new Error('Bad type 2 message');
}
var pos = offset;
while (pos < (offset + length)) {
var blockType = buf.readUInt16LE(pos);
pos += 2;
var blockLength = buf.readUInt16LE(pos);
pos += 2;
if (blockType === 0) {
//reached the terminator subblock
break;
}
var blockTypeStr = void 0;
switch (blockType) {
case 1:
blockTypeStr = 'SERVER';
break;
case 2:
blockTypeStr = 'DOMAIN';
break;
case 3:
blockTypeStr = 'FQDN';
break;
case 4:
blockTypeStr = 'DNS';
break;
case 5:
blockTypeStr = 'PARENT_DNS';
break;
default:
blockTypeStr = '';
break;
}
if (blockTypeStr) {
info[blockTypeStr] = buf.toString('ucs2', pos, pos + blockLength);
}
pos += blockLength;
}
return {
parsed: info,
buffer: targetInfoBuffer
};
})();
}
return obj;
}
function createType3Message(type2Message, username, password, workstation, target) {
var dataPos = 52, buf = new Buffer.alloc(1024);
if (workstation === undefined) {
workstation = os.hostname();
}
if (target === undefined) {
target = type2Message.targetName;
}
//signature
buf.write(NTLMSIGNATURE, 0, NTLMSIGNATURE.length, 'ascii');
//message type
buf.writeUInt32LE(3, 8);
if (type2Message.version === 2) {
dataPos = 64;
var ntlmHash = hash.createNTLMHash(password), nonce = hash.createPseudoRandomValue(16), lmv2 = hash.createLMv2Response(type2Message, username, ntlmHash, nonce, target), ntlmv2 = hash.createNTLMv2Response(type2Message, username, ntlmHash, nonce, target);
//lmv2 security buffer
buf.writeUInt16LE(lmv2.length, 12);
buf.writeUInt16LE(lmv2.length, 14);
buf.writeUInt32LE(dataPos, 16);
lmv2.copy(buf, dataPos);
dataPos += lmv2.length;
//ntlmv2 security buffer
buf.writeUInt16LE(ntlmv2.length, 20);
buf.writeUInt16LE(ntlmv2.length, 22);
buf.writeUInt32LE(dataPos, 24);
ntlmv2.copy(buf, dataPos);
dataPos += ntlmv2.length;
}
else {
var lmHash = hash.createLMHash(password), ntlmHash = hash.createNTLMHash(password), lm = hash.createLMResponse(type2Message.challenge, lmHash), ntlm = hash.createNTLMResponse(type2Message.challenge, ntlmHash);
//lm security buffer
buf.writeUInt16LE(lm.length, 12);
buf.writeUInt16LE(lm.length, 14);
buf.writeUInt32LE(dataPos, 16);
lm.copy(buf, dataPos);
dataPos += lm.length;
//ntlm security buffer
buf.writeUInt16LE(ntlm.length, 20);
buf.writeUInt16LE(ntlm.length, 22);
buf.writeUInt32LE(dataPos, 24);
ntlm.copy(buf, dataPos);
dataPos += ntlm.length;
}
//target name security buffer
buf.writeUInt16LE(type2Message.encoding === 'ascii' ? target.length : target.length * 2, 28);
buf.writeUInt16LE(type2Message.encoding === 'ascii' ? target.length : target.length * 2, 30);
buf.writeUInt32LE(dataPos, 32);
dataPos += buf.write(target, dataPos, type2Message.encoding);
//user name security buffer
buf.writeUInt16LE(type2Message.encoding === 'ascii' ? username.length : username.length * 2, 36);
buf.writeUInt16LE(type2Message.encoding === 'ascii' ? username.length : username.length * 2, 38);
buf.writeUInt32LE(dataPos, 40);
dataPos += buf.write(username, dataPos, type2Message.encoding);
//workstation name security buffer
buf.writeUInt16LE(type2Message.encoding === 'ascii' ? workstation.length : workstation.length * 2, 44);
buf.writeUInt16LE(type2Message.encoding === 'ascii' ? workstation.length : workstation.length * 2, 46);
buf.writeUInt32LE(dataPos, 48);
dataPos += buf.write(workstation, dataPos, type2Message.encoding);
if (type2Message.version === 2) {
//session key security buffer
buf.writeUInt16LE(0, 52);
buf.writeUInt16LE(0, 54);
buf.writeUInt32LE(0, 56);
//flags
buf.writeUInt32LE(type2Message.flags, 60);
}
return 'NTLM ' + buf.toString('base64', 0, dataPos);
}
module.exports = {
createType1Message: createType1Message,
decodeType2Message: decodeType2Message,
createType3Message: createType3Message
};
//# sourceMappingURL=ntlm.js.map
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