MeshCentral/rdp-nla-test.js
2022-04-24 00:51:01 -07:00

329 lines
19 KiB
JavaScript

/*
YST: create_negotiate_message: 4e544c4d53535000010000003582086000000000000000000000000000000000
WRITE: negotiate_message 302fa003020102a12830263024a02204204e544c4d53535000010000003582086000000000000000000000000000000000
READ: read_ts_server_challenge 3081b2a003020106a181aa3081a73081a4a081a104819e4e544c4d53535000020000000e000e003800000035828a62f2290572b3cac375000000000000000058005800460000000a00614a0000000f430045004e005400520041004c0002000e00430045004e005400520041004c0001000e00430045004e005400520041004c0004000e00430065006e007400720061006c0003000e00430065006e007400720061006c0007000800afbc2c2a9256d80100000000
YST: read_challenge_message1: 4e544c4d53535000020000000e000e003800000035828a62f2290572b3cac375000000000000000058005800460000000a00614a0000000f430045004e005400520041004c0002000e00430045004e005400520041004c0001000e00430045004e005400520041004c0004000e00430065006e007400720061006c0003000e00430065006e007400720061006c0007000800afbc2c2a9256d80100000000
YST: target_name: 02000e00430045004e005400520041004c0001000e00430045004e005400520041004c0004000e00430065006e007400720061006c0003000e00430065006e007400720061006c0007000800afbc2c2a9256d80100000000
YST: timestamp: afbc2c2a9256d801
YST: client_challenge: f8d1e2057b9c7169
YST: nt_challenge_response: 32e87ea049485920fca6695ae9daee820101000000000000afbc2c2a9256d801f8d1e2057b9c71690000000002000e00430045004e005400520041004c0001000e00430045004e005400520041004c0004000e00430065006e007400720061006c0003000e00430065006e007400720061006c0007000800afbc2c2a9256d80100000000
YST: lm_challenge_response: 2b0f863797a00d4446a1c9f49de124a5f8d1e2057b9c7169
YST: session_base_key: 52f86f741e92e2e9d8013c1afcecfa13
YST: key_exchange_key: 52f86f741e92e2e9d8013c1afcecfa13
YST: encrypted_random_session_key: d9b2353a7f7ba9569ece01e96686cdef
YST: self.is_unicode: true
YST: domain:
YST: user: 640065006600610075006c007400
YST: tmp_final_auth_message: 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
YST: signature: 4cbff4ee21ce4114c7657d7aa427ca3f
YST: read_challenge_message2: 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
WRITE challenge: 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
READ: read_ts_validate 3081b2a003020106a181aa3081a73081a4a081a104819e4e544c4d53535000020000000e000e003800000035828a62f2290572b3cac375000000000000000058005800460000000a00614a0000000f430045004e005400520041004c0002000e00430045004e005400520041004c0001000e00430045004e005400520041004c0004000e00430065006e007400720061006c0003000e00430065006e007400720061006c0007000800afbc2c2a9256d80100000000
WRITE credentials: 302fa003020102a12830263024a02204204e544c4d53535000010000003582086000000000000000000000000000000000
*/
/*
"Signature" => Check::new(b"NTLMSSP\x00".to_vec()),
"MessageType" => Check::new(U32::LE(2)),
"TargetNameLen" => U16::LE(0),
"TargetNameLenMax" => U16::LE(0),
"TargetNameBufferOffset" => U32::LE(0),
"NegotiateFlags" => DynOption::new(U32::LE(0), |node| {
if node.inner() & (Negotiate::NtlmsspNegociateVersion as u32) == 0 {
return MessageOption::SkipField("Version".to_string())
}
return MessageOption::None
}),
"ServerChallenge" => vec![0; 8],
"Reserved" => vec![0; 8],
"TargetInfoLen" => U16::LE(0),
"TargetInfoMaxLen" => U16::LE(0),
"TargetInfoBufferOffset" => U32::LE(0),
"Version" => version(),
"Payload" => Vec::<u8>::new()
*/
const NegotiateFlags = {
NtlmsspNegociate56: 0x80000000,
NtlmsspNegociateKeyExch: 0x40000000,
NtlmsspNegociate128: 0x20000000,
NtlmsspNegociateVersion: 0x02000000,
NtlmsspNegociateTargetInfo: 0x00800000,
NtlmsspRequestNonNTSessionKey: 0x00400000,
NtlmsspNegociateIdentify: 0x00100000,
NtlmsspNegociateExtendedSessionSecurity: 0x00080000,
NtlmsspTargetTypeServer: 0x00020000,
NtlmsspTargetTypeDomain: 0x00010000,
NtlmsspNegociateAlwaysSign: 0x00008000,
NtlmsspNegociateOEMWorkstationSupplied: 0x00002000,
NtlmsspNegociateOEMDomainSupplied: 0x00001000,
NtlmsspNegociateNTLM: 0x00000200,
NtlmsspNegociateLMKey: 0x00000080,
NtlmsspNegociateDatagram: 0x00000040,
NtlmsspNegociateSeal: 0x00000020,
NtlmsspNegociateSign: 0x00000010,
NtlmsspRequestTarget: 0x00000004,
NtlmNegotiateOEM: 0x00000002,
NtlmsspNegociateUnicode: 0x00000001
}
const MajorVersion = {
WindowsMajorVersion5: 0x05,
WindowsMajorVersion6: 0x06
}
const MinorVersion = {
WindowsMinorVersion0: 0x00,
WindowsMinorVersion1: 0x01,
WindowsMinorVersion2: 0x02,
WindowsMinorVersion3: 0x03
}
const NTLMRevision = {
NtlmSspRevisionW2K3: 0x0F
}
function decodeTargetInfo(targetInfoBuf) {
var r = {}, type, len, data, ptr = 0;
while (true) {
type = targetInfoBuf.readInt16LE(ptr);
if (type == 0) break;
len = targetInfoBuf.readInt16LE(ptr + 2);
r[type] = targetInfoBuf.slice(ptr + 4, ptr + 4 + len);
ptr += (4 + len);
}
return r;
}
function bufToArr(b) { var r = []; for (var i = 0; i < b.length; i++) { r.push(b.readUInt8(i)); } return r; } // For unit testing
function toUnicode(str) { return Buffer.from(str, 'ucs2'); }
function md4(str) { return crypto.createHash('md4').update(str).digest(); }
function md5(str) { return crypto.createHash('md5').update(str).digest(); }
function hmacmd5(key, data) { return crypto.createHmac('md5', key).update(data).digest(); }
function ntowfv2(password, user, domain) { return hmacmd5(md4(toUnicode(password)), toUnicode(user.toUpperCase() + domain)); }
function lmowfv2(password, user, domain) { return ntowfv2(password, user, domain); }
function zeroBuffer(len) { return Buffer.alloc(len); }
function compute_response_v2(response_key_nt, response_key_lm, server_challenge, client_challenge, time, server_name) {
const response_version = Buffer.from('01', 'hex');
const hi_response_version = Buffer.from('01', 'hex');
const temp = Buffer.concat([response_version, hi_response_version, zeroBuffer(6), time, client_challenge, zeroBuffer(4), server_name]);
const nt_proof_str = hmacmd5(response_key_nt, Buffer.concat([server_challenge, temp]));
const nt_challenge_response = Buffer.concat([nt_proof_str, temp]);
const lm_challenge_response = Buffer.concat([hmacmd5(response_key_lm, Buffer.concat([server_challenge, client_challenge])), client_challenge]);
const session_base_key = hmacmd5(response_key_nt, nt_proof_str);
return [nt_challenge_response, lm_challenge_response, session_base_key];
}
function kx_key_v2(session_base_key, _lm_challenge_response, _server_challenge) { return session_base_key; }
function rc4k(key, data) { return crypto.createCipheriv('rc4', key, null).update(data); }
function mac(rc4_handle, signing_key, seq_num, data) {
const buf = Buffer.alloc(4);
buf.writeInt32LE(seq_num, 0);
var signature = hmacmd5(signing_key, Buffer.concat([buf, data]));
return message_signature_ex(rc4_handle.update(signature.slice(0, 8)), seq_num);
}
function message_signature_ex(check_sum, seq_num) {
const buf = Buffer.alloc(16);
buf.writeInt32LE(1, 0); // Version
if (check_sum) { check_sum.copy(buf, 4, 0, 8); } // check_sum
if (seq_num) { buf.writeInt32LE(seq_num, 12); } // seq_num
return buf;
}
/// Compute a signature of all data exchange during NTLMv2 handshake
function mic(exported_session_key, negotiate_message, challenge_message, authenticate_message) { return hmacmd5(exported_session_key, Buffer.concat([negotiate_message, challenge_message, authenticate_message])); }
/// NTLMv2 security interface generate a sign key
/// By using MD5 of the session key + a static member (sentense)
function sign_key(exported_session_key, is_client) {
if (is_client) {
return md5(Buffer.concat([exported_session_key, Buffer.from("session key to client-to-server signing key magic constant\0")]));
} else {
return md5(Buffer.concat([exported_session_key, Buffer.from("session key to server-to-client signing key magic constant\0")]));
}
}
/// NTLMv2 security interface generate a seal key
/// By using MD5 of the session key + a static member (sentense)
function seal_key(exported_session_key, is_client) {
if (is_client) {
return md5(Buffer.concat([exported_session_key, Buffer.from("session key to client-to-server sealing key magic constant\0")]));
} else {
return md5(Buffer.concat([exported_session_key, Buffer.from("session key to server-to-client sealing key magic constant\0")]));
}
}
/// We are now able to build a security interface
/// that will be used by the CSSP manager to cipherring message (private keys)
/// To detect MITM attack
function build_security_interface(ntlm) {
const obj = {};
if (ntlm) {
obj.signing_key = sign_key(ntlm.exported_session_key, true);
obj.verify_key = sign_key(ntlm.exported_session_key, false);
const client_sealing_key = seal_key(ntlm.exported_session_key, true);
const server_sealing_key = seal_key(ntlm.exported_session_key, false);
obj.encrypt = crypto.createCipheriv('rc4', client_sealing_key, null);
obj.decrypt = crypto.createCipheriv('rc4', server_sealing_key, null);
}
obj.seq_num = 0;
obj.gss_wrapex = function (data) {
const encrypted_data = obj.encrypt.update(data);
const signature = mac(obj.encrypt, obj.signing_key, obj.seq_num, data);
obj.seq_num++;
return Buffer.concat([ signature, encrypted_data ] );
}
obj.gss_unwrapex = function(data) {
const version = data.readInt32LE(0);
const checksum = data.slice(4, 12);
const seqnum = data.readInt32LE(12);
const payload = data.slice(16);
const plaintext_payload = obj.decrypt.update(payload);
const plaintext_checksum = obj.decrypt.update(checksum);
const seqnumbuf = Buffer.alloc(4);
seqnumbuf.writeInt32LE(seqnum, 0);
const computed_checksum = hmacmd5(obj.verify_key, Buffer.concat([ seqnumbuf, plaintext_payload ])).slice(0, 8);
if (!plaintext_checksum.equals(computed_checksum)) { console.log("Invalid checksum on NTLMv2"); }
return plaintext_payload.toString();
}
return obj;
}
function Create_Ntlm() {
return {
/// Microsoft Domain for Active Directory
domain: "", //String,
/// Username
user: "", //String,
/// Password
password: "", // String,
/// Key generated from NTLM hash
response_key_nt: null, // Buffer
/// Key generated from NTLM hash
response_key_lm: null, // Buffer
/// Keep trace of each messages to compute a final hash
negotiate_message: null, // Buffer
/// Key use to ciphering messages
exported_session_key: crypto.randomBytes(16), // Buffer
/// True if session use unicode
is_unicode: false // Boolean
}
}
function authenticate_message(lm_challenge_response, nt_challenge_response, domain, user, workstation, encrypted_random_session_key, flags) {
const payload = Buffer.concat([lm_challenge_response, nt_challenge_response, domain, user, workstation, encrypted_random_session_key]);
const offset = ((flags & NegotiateFlags.NtlmsspNegociateVersion) == 0) ? 80 : 88;
const buf = Buffer.alloc(offset - 16);
buf.write('4e544c4d53535000', 0, 8, 'hex'); // Signature
buf.writeInt32LE(3, 8); // MessageType
buf.writeInt16LE(lm_challenge_response.length, 12); // LmChallengeResponseLen
buf.writeInt16LE(lm_challenge_response.length, 14); // LmChallengeResponseMaxLen
buf.writeInt32LE(offset, 16); // LmChallengeResponseBufferOffset
buf.writeInt16LE(nt_challenge_response.length, 20); // NtChallengeResponseLen
buf.writeInt16LE(nt_challenge_response.length, 22); // NtChallengeResponseMaxLen
buf.writeInt32LE(offset + lm_challenge_response.length, 24); // NtChallengeResponseBufferOffset
buf.writeInt16LE(domain.length, 28); // DomainNameLen
buf.writeInt16LE(domain.length, 30); // DomainNameMaxLen
buf.writeInt32LE(offset + lm_challenge_response.length + nt_challenge_response.length, 32); // DomainNameBufferOffset
buf.writeInt16LE(user.length, 36); // UserNameLen
buf.writeInt16LE(user.length, 38); // UserNameMaxLen
buf.writeInt32LE(offset + lm_challenge_response.length + nt_challenge_response.length + domain.length, 40); // UserNameBufferOffset
buf.writeInt16LE(workstation.length, 44); // WorkstationLen
buf.writeInt16LE(workstation.length, 46); // WorkstationMaxLen
buf.writeInt32LE(offset + lm_challenge_response.length + nt_challenge_response.length + domain.length + user.length, 48); // WorkstationBufferOffset
buf.writeInt16LE(encrypted_random_session_key.length, 52); // EncryptedRandomSessionLen
buf.writeInt16LE(encrypted_random_session_key.length, 54); // EncryptedRandomSessionMaxLen
buf.writeInt32LE(offset + lm_challenge_response.length + nt_challenge_response.length + domain.length + user.length + workstation.length, 56); // EncryptedRandomSessionBufferOffset
buf.writeInt32LE(flags, 60); // NegotiateFlags
if ((flags & NegotiateFlags.NtlmsspNegociateVersion) != 0) {
buf.writeUInt8(MajorVersion.WindowsMajorVersion6, 64); // ProductMajorVersion
buf.writeUInt8(MinorVersion.WindowsMinorVersion0, 65); // ProductMinorVersion
buf.writeInt16LE(6002, 66); // ProductBuild
//buf.writeInt16LE(0, 68); // Reserved
//buf.writeUInt8(0, 70); // Reserved
buf.writeUInt8(NTLMRevision.NtlmSspRevisionW2K3, 71); // NTLMRevisionCurrent
}
return [buf, payload];
}
function read_challenge_message(ntlm, derBuffer) {
const headerSignature = derBuffer.slice(0, 8);
if (headerSignature.toString('hex') != '4e544c4d53535000') { console.log('BAD SIGNATURE'); }
const messageType = derBuffer.readInt32LE(8);
if (messageType != 2) { console.log('BAD MESSAGE TYPE'); }
const targetNameLen = derBuffer.readInt16LE(12);
const targetNameLenMax = derBuffer.readInt16LE(14);
const targetNameBufferOffset = derBuffer.readInt32LE(16);
const negotiateFlags = derBuffer.readInt32LE(20);
const serverChallenge = derBuffer.slice(24, 32);
const reserved = derBuffer.slice(32, 40);
if (reserved.toString('hex') != '0000000000000000') { console.log('BAD RESERVED'); }
const targetInfoLen = derBuffer.readInt16LE(40);
const targetInfoLenMax = derBuffer.readInt16LE(42);
const targetInfoBufferOffset = derBuffer.readInt32LE(44);
const targetName = derBuffer.slice(targetNameBufferOffset, targetNameBufferOffset + targetNameLen);
const targetInfo = decodeTargetInfo(derBuffer.slice(targetInfoBufferOffset, targetInfoBufferOffset + targetInfoLen));
const timestamp = targetInfo[7];
if (timestamp == null) { console.log('NO TIMESTAMP'); }
const clientChallenge = crypto.randomBytes(8);
const response_key_nt = ntowfv2(ntlm.password, ntlm.user, ntlm.domain); // Password, Username, Domain
const response_key_lm = lmowfv2(ntlm.password, ntlm.user, ntlm.domain); // Password, Username, Domain
var resp = compute_response_v2(response_key_nt, response_key_lm, serverChallenge, clientChallenge, timestamp, targetName);
const nt_challenge_response = resp[0];
const lm_challenge_response = resp[1];
const session_base_key = resp[2];
const key_exchange_key = kx_key_v2(session_base_key, lm_challenge_response, serverChallenge);
const encrypted_random_session_key = rc4k(key_exchange_key, ntlm.exported_session_key);
ntlm.is_unicode = ((negotiateFlags & 1) != 0)
var xdomain = null;
var xuser = null;
if (ntlm.is_unicode) {
xdomain = toUnicode(ntlm.domain);
xuser = toUnicode(ntlm.user);
} else {
xdomain = Buffer.from(ntlm.domain, 'utf8');
xuser = Buffer.from(ntlm.user, 'utf8');
}
const auth_message_compute = authenticate_message(lm_challenge_response, nt_challenge_response, xdomain, xuser, zeroBuffer(0), encrypted_random_session_key, negotiateFlags);
// Write a tmp message to compute MIC and then include it into final message
const tmp_final_auth_message = Buffer.concat([auth_message_compute[0], zeroBuffer(16), auth_message_compute[1]]);
const signature = mic(ntlm.exported_session_key, ntlm.negotiate_message, derBuffer, tmp_final_auth_message);
return Buffer.concat([auth_message_compute[0], signature, auth_message_compute[1]]);
}
// Create create_ts_request
const crypto = require('crypto');
const forge = require('node-forge');
const asn1 = forge.asn1;
const pki = forge.pki;
const entireBuffer = Buffer.from('3081b2a003020106a181aa3081a73081a4a081a104819e4e544c4d53535000020000000e000e003800000035828a62f2290572b3cac375000000000000000058005800460000000a00614a0000000f430045004e005400520041004c0002000e00430045004e005400520041004c0001000e00430045004e005400520041004c0004000e00430065006e007400720061006c0003000e00430065006e007400720061006c0007000800afbc2c2a9256d80100000000', 'hex').toString('binary');
const ntml = Create_Ntlm();
ntml.domain = "";
ntml.user = "default";
ntml.password = "";
ntml.negotiate_message = Buffer.from('4e544c4d53535000010000003582086000000000000000000000000000000000', 'hex');
// We have a full ASN1 data block, decode it now
const der = asn1.fromDer(entireBuffer.toString('binary'));
const derNum = der.value[0].value[0].value.charCodeAt(0);
const derBuffer = Buffer.from(der.value[1].value[0].value[0].value[0].value[0].value, 'binary');
const client_challenge = read_challenge_message(ntml, derBuffer);
console.log('client_challenge', client_challenge.toString('hex'));
const NTLMv2SecurityInterface = build_security_interface(ntml);