/
ntlm-payload.ts
171 lines (150 loc) · 5.5 KB
/
ntlm-payload.ts
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import WritableTrackingBuffer from './tracking-buffer/writable-tracking-buffer';
import * as crypto from 'crypto';
import JSBI from 'jsbi';
type Options = {
domain: string,
userName: string,
password: string,
ntlmpacket: {
target: Buffer,
nonce: Buffer
}
};
class NTLMResponsePayload {
data: Buffer;
constructor(loginData: Options) {
this.data = this.createResponse(loginData);
}
toString(indent: string = '') {
return indent + 'NTLM Auth';
}
createResponse(challenge: Options) {
const client_nonce = this.createClientNonce();
const lmv2len = 24;
const ntlmv2len = 16;
const domain = challenge.domain;
const username = challenge.userName;
const password = challenge.password;
const ntlmData = challenge.ntlmpacket;
const server_data = ntlmData.target;
const server_nonce = ntlmData.nonce;
const bufferLength = 64 + (domain.length * 2) + (username.length * 2) + lmv2len + ntlmv2len + 8 + 8 + 8 + 4 + server_data.length + 4;
const data = new WritableTrackingBuffer(bufferLength);
data.position = 0;
data.writeString('NTLMSSP\u0000', 'utf8');
data.writeUInt32LE(0x03);
const baseIdx = 64;
const dnIdx = baseIdx;
const unIdx = dnIdx + domain.length * 2;
const l2Idx = unIdx + username.length * 2;
const ntIdx = l2Idx + lmv2len;
data.writeUInt16LE(lmv2len);
data.writeUInt16LE(lmv2len);
data.writeUInt32LE(l2Idx);
data.writeUInt16LE(ntlmv2len);
data.writeUInt16LE(ntlmv2len);
data.writeUInt32LE(ntIdx);
data.writeUInt16LE(domain.length * 2);
data.writeUInt16LE(domain.length * 2);
data.writeUInt32LE(dnIdx);
data.writeUInt16LE(username.length * 2);
data.writeUInt16LE(username.length * 2);
data.writeUInt32LE(unIdx);
data.writeUInt16LE(0);
data.writeUInt16LE(0);
data.writeUInt32LE(baseIdx);
data.writeUInt16LE(0);
data.writeUInt16LE(0);
data.writeUInt32LE(baseIdx);
data.writeUInt16LE(0x8201);
data.writeUInt16LE(0x08);
data.writeString(domain, 'ucs2');
data.writeString(username, 'ucs2');
const lmv2Data = this.lmv2Response(domain, username, password, server_nonce, client_nonce);
data.copyFrom(lmv2Data);
const genTime = new Date().getTime();
const ntlmDataBuffer = this.ntlmv2Response(domain, username, password, server_nonce, server_data, client_nonce, genTime);
data.copyFrom(ntlmDataBuffer);
data.writeUInt32LE(0x0101);
data.writeUInt32LE(0x0000);
const timestamp = this.createTimestamp(genTime);
data.copyFrom(timestamp);
data.copyFrom(client_nonce);
data.writeUInt32LE(0x0000);
data.copyFrom(server_data);
data.writeUInt32LE(0x0000);
return data.data;
}
createClientNonce() {
const client_nonce = Buffer.alloc(8, 0);
let nidx = 0;
while (nidx < 8) {
client_nonce.writeUInt8(Math.ceil(Math.random() * 255), nidx);
nidx++;
}
return client_nonce;
}
ntlmv2Response(domain: string, user: string, password: string, serverNonce: Buffer, targetInfo: Buffer, clientNonce: Buffer, mytime: number) {
const timestamp = this.createTimestamp(mytime);
const hash = this.ntv2Hash(domain, user, password);
const dataLength = 40 + targetInfo.length;
const data = Buffer.alloc(dataLength, 0);
serverNonce.copy(data, 0, 0, 8);
data.writeUInt32LE(0x101, 8);
data.writeUInt32LE(0x0, 12);
timestamp.copy(data, 16, 0, 8);
clientNonce.copy(data, 24, 0, 8);
data.writeUInt32LE(0x0, 32);
targetInfo.copy(data, 36, 0, targetInfo.length);
data.writeUInt32LE(0x0, 36 + targetInfo.length);
return this.hmacMD5(data, hash);
}
createTimestamp(time: number) {
const tenthsOfAMicrosecond = JSBI.multiply(JSBI.add(JSBI.BigInt(time), JSBI.BigInt(11644473600)), JSBI.BigInt(10000000));
const lo = JSBI.toNumber(JSBI.bitwiseAnd(tenthsOfAMicrosecond, JSBI.BigInt(0xffffffff)));
const hi = JSBI.toNumber(JSBI.bitwiseAnd(JSBI.signedRightShift(tenthsOfAMicrosecond, JSBI.BigInt(32)), JSBI.BigInt(0xffffffff)));
const result = Buffer.alloc(8);
result.writeUInt32LE(lo, 0);
result.writeUInt32LE(hi, 4);
return result;
}
lmv2Response(domain: string, user: string, password: string, serverNonce: Buffer, clientNonce: Buffer) {
const hash = this.ntv2Hash(domain, user, password);
const data = Buffer.alloc(serverNonce.length + clientNonce.length, 0);
serverNonce.copy(data);
clientNonce.copy(data, serverNonce.length, 0, clientNonce.length);
const newhash = this.hmacMD5(data, hash);
const response = Buffer.alloc(newhash.length + clientNonce.length, 0);
newhash.copy(response);
clientNonce.copy(response, newhash.length, 0, clientNonce.length);
return response;
}
ntv2Hash(domain: string, user: string, password: string) {
const hash = this.ntHash(password);
const identity = Buffer.from(user.toUpperCase() + domain.toUpperCase(), 'ucs2');
return this.hmacMD5(identity, hash);
}
ntHash(text: string) {
const hash = Buffer.alloc(21, 0);
const unicodeString = Buffer.from(text, 'ucs2');
const md4 = crypto.createHash('md4').update(unicodeString).digest();
if (md4.copy) {
md4.copy(hash);
} else {
Buffer.from(md4).copy(hash);
}
return hash;
}
hmacMD5(data: Buffer, key: Buffer) {
const hmac = crypto.createHmac('MD5', key);
hmac.update(data);
const result = hmac.digest();
if (result.copy) {
return result;
} else {
return Buffer.from(result).slice(0, 16);
}
}
}
export default NTLMResponsePayload;
module.exports = NTLMResponsePayload;