refactor: mylib 重命名为 libs

更清晰的目录命名，libs/ 存放内嵌的独立协议实现库。
2026-09-24 20:21:52 +08:00 · 2026-06-01 08:22:13 +08:00
parent 019d13c9d4
commit a02eed0518
30 changed files with 57 additions and 57 deletions
@@ -0,0 +1,183 @@
+package lic
+
+import (
+	"io"
+
+	"github.com/shadow1ng/fscan/libs/grdp/core"
+)
+
+const (
+	LICENSE_REQUEST             = 0x01
+	PLATFORM_CHALLENGE          = 0x02
+	NEW_LICENSE                 = 0x03
+	UPGRADE_LICENSE             = 0x04
+	LICENSE_INFO                = 0x12
+	NEW_LICENSE_REQUEST         = 0x13
+	PLATFORM_CHALLENGE_RESPONSE = 0x15
+	ERROR_ALERT                 = 0xFF
+)
+
+// error code
+const (
+	ERR_INVALID_SERVER_CERTIFICATE = 0x00000001
+	ERR_NO_LICENSE                 = 0x00000002
+	ERR_INVALID_SCOPE              = 0x00000004
+	ERR_NO_LICENSE_SERVER          = 0x00000006
+	STATUS_VALID_CLIENT            = 0x00000007
+	ERR_INVALID_CLIENT             = 0x00000008
+	ERR_INVALID_PRODUCTID          = 0x0000000B
+	ERR_INVALID_MESSAGE_LEN        = 0x0000000C
+	ERR_INVALID_MAC                = 0x00000003
+)
+
+// state transition
+const (
+	ST_TOTAL_ABORT          = 0x00000001
+	ST_NO_TRANSITION        = 0x00000002
+	ST_RESET_PHASE_TO_START = 0x00000003
+	ST_RESEND_LAST_MESSAGE  = 0x00000004
+)
+
+/*
+"""
+@summary: Binary blob data type
+@see: http://msdn.microsoft.com/en-us/library/cc240481.aspx
+"""
+*/
+type BinaryBlobType uint16
+
+const (
+	BB_ANY_BLOB                 = 0x0000
+	BB_DATA_BLOB                = 0x0001
+	BB_RANDOM_BLOB              = 0x0002
+	BB_CERTIFICATE_BLOB         = 0x0003
+	BB_ERROR_BLOB               = 0x0004
+	BB_ENCRYPTED_DATA_BLOB      = 0x0009
+	BB_KEY_EXCHG_ALG_BLOB       = 0x000D
+	BB_SCOPE_BLOB               = 0x000E
+	BB_CLIENT_USER_NAME_BLOB    = 0x000F
+	BB_CLIENT_MACHINE_NAME_BLOB = 0x0010
+)
+
+type ErrorMessage struct {
+	DwErrorCode        uint32
+	DwStateTransaction uint32
+	Blob               []byte
+}
+
+func readErrorMessage(r io.Reader) *ErrorMessage {
+	m := &ErrorMessage{}
+	m.DwErrorCode, _ = core.ReadUInt32LE(r)
+	m.DwStateTransaction, _ = core.ReadUInt32LE(r)
+	return m
+}
+
+type LicensePacket struct {
+	BMsgtype         uint8
+	Flag             uint8
+	WMsgSize         uint16
+	LicensingMessage interface{}
+}
+
+func ReadLicensePacket(r io.Reader) *LicensePacket {
+	l := &LicensePacket{}
+	l.BMsgtype, _ = core.ReadUInt8(r)
+	l.Flag, _ = core.ReadUInt8(r)
+	l.WMsgSize, _ = core.ReadUint16LE(r)
+
+	switch l.BMsgtype {
+	case ERROR_ALERT:
+		l.LicensingMessage = readErrorMessage(r)
+	default:
+		l.LicensingMessage, _ = core.ReadBytes(int(l.WMsgSize-4), r)
+	}
+
+	return l
+}
+
+/*
+"""
+@summary: Blob use by license manager to exchange security data
+@see: http://msdn.microsoft.com/en-us/library/cc240481.aspx
+"""
+*/
+type LicenseBinaryBlob struct {
+	WBlobType uint16 `struc:"little"`
+	WBlobLen  uint16 `struc:"little"`
+	BlobData  []byte `struc:"sizefrom=WBlobLen"`
+}
+
+func NewLicenseBinaryBlob(WBlobType uint16) *LicenseBinaryBlob {
+	return &LicenseBinaryBlob{}
+}
+
+/*
+"""
+@summary: License server product information
+@see: http://msdn.microsoft.com/en-us/library/cc241915.aspx
+"""
+*/
+type ProductInformation struct {
+	DwVersion     uint32 `struc:"little"`
+	CbCompanyName uint32 `struc:"little"`
+	//may contain "Microsoft Corporation" from server microsoft
+	PbCompanyName []byte `struc:"sizefrom=CbCompanyName"`
+	CbProductId   uint32 `struc:"little"`
+	//may contain "A02" from microsoft license server
+	PbProductId []byte `struc:"sizefrom=CbProductId"`
+}
+
+/*
+@summary:  Send by server to signal license request
+
+	server -> client
+
+@see: http://msdn.microsoft.com/en-us/library/cc241914.aspx
+*/
+type ServerLicenseRequest struct {
+	ServerRandom      []byte             `struc:"[32]byte"`
+	ProductInfo       ProductInformation `struc:"little"`
+	KeyExchangeList   LicenseBinaryBlob  `struc:"little"`
+	ServerCertificate LicenseBinaryBlob  `struc:"little"`
+	//ScopeList         ScopeList
+}
+
+/*
+@summary:  Send by client to ask new license for client.
+            RDPY doesn'support license reuse, need it in futur version
+@see: http://msdn.microsoft.com/en-us/library/cc241918.aspx
+ 	#RSA and must be only RSA
+    #pure microsoft client ;-)
+    #http://msdn.microsoft.com/en-us/library/1040af38-c733-4fb3-acd1-8db8cc979eda#id10
+*/
+
+type ClientNewLicenseRequest struct {
+	PreferredKeyExchangeAlg  uint32            `struc:"little"`
+	PlatformId               uint32            `struc:"little"`
+	ClientRandom             []byte            `struc:"[32]byte"`
+	EncryptedPreMasterSecret LicenseBinaryBlob `struc:"little"`
+	ClientUserName           LicenseBinaryBlob `struc:"little"`
+	ClientMachineName        LicenseBinaryBlob `struc:"little"`
+}
+
+/*
+@summary: challenge send from server to client
+@see: http://msdn.microsoft.com/en-us/library/cc241921.aspx
+*/
+type ServerPlatformChallenge struct {
+	ConnectFlags               uint32
+	EncryptedPlatformChallenge LicenseBinaryBlob
+	MACData                    [16]byte
+}
+
+/*
+"""
+@summary: client challenge response
+@see: http://msdn.microsoft.com/en-us/library/cc241922.aspx
+"""
+*/
+type ClientPLatformChallengeResponse struct {
+	EncryptedPlatformChallengeResponse LicenseBinaryBlob
+	EncryptedHWID                      LicenseBinaryBlob
+	MACData                            []byte //[16]byte
+}
@@ -0,0 +1,99 @@
+package nla
+
+import (
+	"encoding/asn1"
+
+	"github.com/shadow1ng/fscan/libs/grdp/glog"
+)
+
+type NegoToken struct {
+	Data []byte `asn1:"explicit,tag:0"`
+}
+
+type TSRequest struct {
+	Version    int         `asn1:"explicit,tag:0"`
+	NegoTokens []NegoToken `asn1:"optional,explicit,tag:1"`
+	AuthInfo   []byte      `asn1:"optional,explicit,tag:2"`
+	PubKeyAuth []byte      `asn1:"optional,explicit,tag:3"`
+	ErrorCode  int         `asn1:"optional,explicit,tag:4"`
+}
+
+type TSCredentials struct {
+	CredType    int    `asn1:"explicit,tag:0"`
+	Credentials []byte `asn1:"explicit,tag:1"`
+}
+
+type TSPasswordCreds struct {
+	DomainName []byte `asn1:"explicit,tag:0"`
+	UserName   []byte `asn1:"explicit,tag:1"`
+	Password   []byte `asn1:"explicit,tag:2"`
+}
+
+type TSCspDataDetail struct {
+	KeySpec       int    `asn1:"explicit,tag:0"`
+	CardName      string `asn1:"explicit,tag:1"`
+	ReaderName    string `asn1:"explicit,tag:2"`
+	ContainerName string `asn1:"explicit,tag:3"`
+	CspName       string `asn1:"explicit,tag:4"`
+}
+
+type TSSmartCardCreds struct {
+	Pin        string            `asn1:"explicit,tag:0"`
+	CspData    []TSCspDataDetail `asn1:"explicit,tag:1"`
+	UserHint   string            `asn1:"explicit,tag:2"`
+	DomainHint string            `asn1:"explicit,tag:3"`
+}
+
+func EncodeDERTRequest(msgs []Message, authInfo []byte, pubKeyAuth []byte) []byte {
+	req := TSRequest{
+		Version: 2,
+	}
+
+	if len(msgs) > 0 {
+		req.NegoTokens = make([]NegoToken, 0, len(msgs))
+	}
+
+	for _, msg := range msgs {
+		token := NegoToken{msg.Serialize()}
+		req.NegoTokens = append(req.NegoTokens, token)
+	}
+
+	if len(authInfo) > 0 {
+		req.AuthInfo = authInfo
+	}
+
+	if len(pubKeyAuth) > 0 {
+		req.PubKeyAuth = pubKeyAuth
+	}
+
+	result, err := asn1.Marshal(req)
+	if err != nil {
+		glog.Error(err)
+	}
+	return result
+}
+
+func DecodeDERTRequest(s []byte) (*TSRequest, error) {
+	treq := &TSRequest{}
+	_, err := asn1.Unmarshal(s, treq)
+	return treq, err
+}
+func EncodeDERTCredentials(domain, username, password []byte) []byte {
+	tpas := TSPasswordCreds{domain, username, password}
+	result, err := asn1.Marshal(tpas)
+	if err != nil {
+		glog.Error(err)
+	}
+	tcre := TSCredentials{1, result}
+	result, err = asn1.Marshal(tcre)
+	if err != nil {
+		glog.Error(err)
+	}
+	return result
+}
+
+func DecodeDERTCredentials(s []byte) (*TSCredentials, error) {
+	tcre := &TSCredentials{}
+	_, err := asn1.Unmarshal(s, tcre)
+	return tcre, err
+}
@@ -0,0 +1,46 @@
+package nla
+
+import (
+	"crypto/hmac"
+	"crypto/md5"
+	"crypto/rc4"
+	"strings"
+
+	"github.com/shadow1ng/fscan/libs/grdp/core"
+	"golang.org/x/crypto/md4"
+)
+
+func MD4(data []byte) []byte {
+	h := md4.New()
+	h.Write(data)
+	return h.Sum(nil)
+}
+
+func MD5(data []byte) []byte {
+	h := md5.New()
+	h.Write(data)
+	return h.Sum(nil)
+}
+
+func HMAC_MD5(key, data []byte) []byte {
+	h := hmac.New(md5.New, key)
+	h.Write(data)
+	return h.Sum(nil)
+}
+
+// Version 2 of NTLM hash function
+func NTOWFv2(password, user, domain string) []byte {
+	return HMAC_MD5(MD4(core.UnicodeEncode(password)), core.UnicodeEncode(strings.ToUpper(user)+domain))
+}
+
+// Same as NTOWFv2
+func LMOWFv2(password, user, domain string) []byte {
+	return NTOWFv2(password, user, domain)
+}
+
+func RC4K(key, src []byte) []byte {
+	result := make([]byte, len(src))
+	rc4obj, _ := rc4.NewCipher(key)
+	rc4obj.XORKeyStream(result, src)
+	return result
+}
@@ -0,0 +1,515 @@
+package nla
+
+import (
+	"bytes"
+	"crypto/md5"
+	"crypto/rc4"
+	"encoding/binary"
+	"encoding/hex"
+	"time"
+
+	"github.com/lunixbochs/struc"
+	"github.com/shadow1ng/fscan/libs/grdp/core"
+	"github.com/shadow1ng/fscan/libs/grdp/glog"
+)
+
+const (
+	WINDOWS_MINOR_VERSION_0 = 0x00
+	WINDOWS_MINOR_VERSION_1 = 0x01
+	WINDOWS_MINOR_VERSION_2 = 0x02
+	WINDOWS_MINOR_VERSION_3 = 0x03
+
+	WINDOWS_MAJOR_VERSION_5 = 0x05
+	WINDOWS_MAJOR_VERSION_6 = 0x06
+	NTLMSSP_REVISION_W2K3   = 0x0F
+)
+
+const (
+	MsvAvEOL             = 0x0000
+	MsvAvNbComputerName  = 0x0001
+	MsvAvNbDomainName    = 0x0002
+	MsvAvDnsComputerName = 0x0003
+	MsvAvDnsDomainName   = 0x0004
+	MsvAvDnsTreeName     = 0x0005
+	MsvAvFlags           = 0x0006
+	MsvAvTimestamp       = 0x0007
+	MsvAvSingleHost      = 0x0008
+	MsvAvTargetName      = 0x0009
+	MsvChannelBindings   = 0x000A
+)
+
+type AVPair struct {
+	Id    uint16 `struc:"little"`
+	Len   uint16 `struc:"little,sizeof=Value"`
+	Value []byte `struc:"little"`
+}
+
+const (
+	NTLMSSP_NEGOTIATE_56                       = 0x80000000
+	NTLMSSP_NEGOTIATE_KEY_EXCH                 = 0x40000000
+	NTLMSSP_NEGOTIATE_128                      = 0x20000000
+	NTLMSSP_NEGOTIATE_VERSION                  = 0x02000000
+	NTLMSSP_NEGOTIATE_TARGET_INFO              = 0x00800000
+	NTLMSSP_REQUEST_NON_NT_SESSION_KEY         = 0x00400000
+	NTLMSSP_NEGOTIATE_IDENTIFY                 = 0x00100000
+	NTLMSSP_NEGOTIATE_EXTENDED_SESSIONSECURITY = 0x00080000
+	NTLMSSP_TARGET_TYPE_SERVER                 = 0x00020000
+	NTLMSSP_TARGET_TYPE_DOMAIN                 = 0x00010000
+	NTLMSSP_NEGOTIATE_ALWAYS_SIGN              = 0x00008000
+	NTLMSSP_NEGOTIATE_OEM_WORKSTATION_SUPPLIED = 0x00002000
+	NTLMSSP_NEGOTIATE_OEM_DOMAIN_SUPPLIED      = 0x00001000
+	NTLMSSP_NEGOTIATE_NTLM                     = 0x00000200
+	NTLMSSP_NEGOTIATE_LM_KEY                   = 0x00000080
+	NTLMSSP_NEGOTIATE_DATAGRAM                 = 0x00000040
+	NTLMSSP_NEGOTIATE_SEAL                     = 0x00000020
+	NTLMSSP_NEGOTIATE_SIGN                     = 0x00000010
+	NTLMSSP_REQUEST_TARGET                     = 0x00000004
+	NTLM_NEGOTIATE_OEM                         = 0x00000002
+	NTLMSSP_NEGOTIATE_UNICODE                  = 0x00000001
+)
+
+type NVersion struct {
+	ProductMajorVersion uint8   `struc:"little"`
+	ProductMinorVersion uint8   `struc:"little"`
+	ProductBuild        uint16  `struc:"little"`
+	Reserved            [3]byte `struc:"little"`
+	NTLMRevisionCurrent uint8   `struc:"little"`
+}
+
+func NewNVersion() NVersion {
+	return NVersion{
+		ProductMajorVersion: WINDOWS_MAJOR_VERSION_6,
+		ProductMinorVersion: WINDOWS_MINOR_VERSION_0,
+		ProductBuild:        6002,
+		NTLMRevisionCurrent: NTLMSSP_REVISION_W2K3,
+	}
+}
+
+type Message interface {
+	Serialize() []byte
+}
+
+type NegotiateMessage struct {
+	Signature               [8]byte  `struc:"little"`
+	MessageType             uint32   `struc:"little"`
+	NegotiateFlags          uint32   `struc:"little"`
+	DomainNameLen           uint16   `struc:"little"`
+	DomainNameMaxLen        uint16   `struc:"little"`
+	DomainNameBufferOffset  uint32   `struc:"little"`
+	WorkstationLen          uint16   `struc:"little"`
+	WorkstationMaxLen       uint16   `struc:"little"`
+	WorkstationBufferOffset uint32   `struc:"little"`
+	Version                 NVersion `struc:"little"`
+	Payload                 [32]byte `struc:"skip"`
+}
+
+func NewNegotiateMessage() *NegotiateMessage {
+	return &NegotiateMessage{
+		Signature:   [8]byte{'N', 'T', 'L', 'M', 'S', 'S', 'P', 0x00},
+		MessageType: 0x00000001,
+	}
+}
+
+func (m *NegotiateMessage) Serialize() []byte {
+	if (m.NegotiateFlags & NTLMSSP_NEGOTIATE_VERSION) != 0 {
+		m.Version = NewNVersion()
+	}
+	buff := &bytes.Buffer{}
+	struc.Pack(buff, m)
+
+	return buff.Bytes()
+}
+
+type ChallengeMessage struct {
+	Signature              []byte   `struc:"[8]byte"`
+	MessageType            uint32   `struc:"little"`
+	TargetNameLen          uint16   `struc:"little"`
+	TargetNameMaxLen       uint16   `struc:"little"`
+	TargetNameBufferOffset uint32   `struc:"little"`
+	NegotiateFlags         uint32   `struc:"little"`
+	ServerChallenge        [8]byte  `struc:"little"`
+	Reserved               [8]byte  `struc:"little"`
+	TargetInfoLen          uint16   `struc:"little"`
+	TargetInfoMaxLen       uint16   `struc:"little"`
+	TargetInfoBufferOffset uint32   `struc:"little"`
+	Version                NVersion `struc:"skip"`
+	Payload                []byte   `struc:"skip"`
+}
+
+func (m *ChallengeMessage) Serialize() []byte {
+	buff := &bytes.Buffer{}
+	struc.Pack(buff, m)
+	if (m.NegotiateFlags & NTLMSSP_NEGOTIATE_VERSION) != 0 {
+		struc.Pack(buff, m.Version)
+	}
+	buff.Write(m.Payload)
+	return buff.Bytes()
+}
+
+func NewChallengeMessage() *ChallengeMessage {
+	return &ChallengeMessage{
+		Signature:   []byte{'N', 'T', 'L', 'M', 'S', 'S', 'P', 0x00},
+		MessageType: 0x00000002,
+	}
+}
+
+// total len - payload len
+func (m *ChallengeMessage) BaseLen() uint32 {
+	return 56
+}
+
+func (m *ChallengeMessage) getTargetInfo() []byte {
+	if m.TargetInfoLen == 0 {
+		return make([]byte, 0)
+	}
+	offset := m.BaseLen()
+	start := m.TargetInfoBufferOffset - offset
+	return m.Payload[start : start+uint32(m.TargetInfoLen)]
+}
+func (m *ChallengeMessage) getTargetName() []byte {
+	if m.TargetNameLen == 0 {
+		return make([]byte, 0)
+	}
+	offset := m.BaseLen()
+	start := m.TargetNameBufferOffset - offset
+	return m.Payload[start : start+uint32(m.TargetNameLen)]
+}
+func (m *ChallengeMessage) getTargetInfoTimestamp(data []byte) []byte {
+	r := bytes.NewReader(data)
+	for r.Len() > 0 {
+		avPair := &AVPair{}
+		struc.Unpack(r, avPair)
+		if avPair.Id == MsvAvTimestamp {
+			return avPair.Value
+		}
+
+		if avPair.Id == MsvAvEOL {
+			break
+		}
+	}
+	return nil
+}
+
+type AuthenticateMessage struct {
+	Signature                          [8]byte
+	MessageType                        uint32   `struc:"little"`
+	LmChallengeResponseLen             uint16   `struc:"little"`
+	LmChallengeResponseMaxLen          uint16   `struc:"little"`
+	LmChallengeResponseBufferOffset    uint32   `struc:"little"`
+	NtChallengeResponseLen             uint16   `struc:"little"`
+	NtChallengeResponseMaxLen          uint16   `struc:"little"`
+	NtChallengeResponseBufferOffset    uint32   `struc:"little"`
+	DomainNameLen                      uint16   `struc:"little"`
+	DomainNameMaxLen                   uint16   `struc:"little"`
+	DomainNameBufferOffset             uint32   `struc:"little"`
+	UserNameLen                        uint16   `struc:"little"`
+	UserNameMaxLen                     uint16   `struc:"little"`
+	UserNameBufferOffset               uint32   `struc:"little"`
+	WorkstationLen                     uint16   `struc:"little"`
+	WorkstationMaxLen                  uint16   `struc:"little"`
+	WorkstationBufferOffset            uint32   `struc:"little"`
+	EncryptedRandomSessionLen          uint16   `struc:"little"`
+	EncryptedRandomSessionMaxLen       uint16   `struc:"little"`
+	EncryptedRandomSessionBufferOffset uint32   `struc:"little"`
+	NegotiateFlags                     uint32   `struc:"little"`
+	Version                            NVersion `struc:"little"`
+	MIC                                [16]byte `struc:"little"`
+	Payload                            []byte   `struc:"skip"`
+}
+
+func (m *AuthenticateMessage) BaseLen() uint32 {
+	return 88
+}
+
+func NewAuthenticateMessage(negFlag uint32, domain, user, workstation []byte,
+	lmchallResp, ntchallResp, enRandomSessKey []byte) *AuthenticateMessage {
+	msg := &AuthenticateMessage{
+		Signature:      [8]byte{'N', 'T', 'L', 'M', 'S', 'S', 'P', 0x00},
+		MessageType:    0x00000003,
+		NegotiateFlags: negFlag,
+	}
+	payloadBuff := &bytes.Buffer{}
+
+	msg.LmChallengeResponseLen = uint16(len(lmchallResp))
+	msg.LmChallengeResponseMaxLen = msg.LmChallengeResponseLen
+	msg.LmChallengeResponseBufferOffset = msg.BaseLen()
+	payloadBuff.Write(lmchallResp)
+
+	msg.NtChallengeResponseLen = uint16(len(ntchallResp))
+	msg.NtChallengeResponseMaxLen = msg.NtChallengeResponseLen
+	msg.NtChallengeResponseBufferOffset = msg.LmChallengeResponseBufferOffset + uint32(msg.LmChallengeResponseLen)
+	payloadBuff.Write(ntchallResp)
+
+	msg.DomainNameLen = uint16(len(domain))
+	msg.DomainNameMaxLen = msg.DomainNameLen
+	msg.DomainNameBufferOffset = msg.NtChallengeResponseBufferOffset + uint32(msg.NtChallengeResponseLen)
+	payloadBuff.Write(domain)
+
+	msg.UserNameLen = uint16(len(user))
+	msg.UserNameMaxLen = msg.UserNameLen
+	msg.UserNameBufferOffset = msg.DomainNameBufferOffset + uint32(msg.DomainNameLen)
+	payloadBuff.Write(user)
+
+	msg.WorkstationLen = uint16(len(workstation))
+	msg.WorkstationMaxLen = msg.WorkstationLen
+	msg.WorkstationBufferOffset = msg.UserNameBufferOffset + uint32(msg.UserNameLen)
+	payloadBuff.Write(workstation)
+
+	msg.EncryptedRandomSessionLen = uint16(len(enRandomSessKey))
+	msg.EncryptedRandomSessionMaxLen = msg.EncryptedRandomSessionLen
+	msg.EncryptedRandomSessionBufferOffset = msg.WorkstationBufferOffset + uint32(msg.WorkstationLen)
+	payloadBuff.Write(enRandomSessKey)
+
+	if (msg.NegotiateFlags & NTLMSSP_NEGOTIATE_VERSION) != 0 {
+		msg.Version = NewNVersion()
+	}
+	msg.Payload = payloadBuff.Bytes()
+
+	return msg
+}
+
+func (m *AuthenticateMessage) Serialize() []byte {
+	buff := &bytes.Buffer{}
+	struc.Pack(buff, m)
+	buff.Write(m.Payload)
+	return buff.Bytes()
+}
+
+type NTLMv2 struct {
+	domain              string
+	user                string
+	password            string
+	respKeyNT           []byte
+	respKeyLM           []byte
+	negotiateMessage    *NegotiateMessage
+	challengeMessage    *ChallengeMessage
+	authenticateMessage *AuthenticateMessage
+	enableUnicode       bool
+}
+
+func NewNTLMv2(domain, user, password string) *NTLMv2 {
+	return &NTLMv2{
+		domain:    domain,
+		user:      user,
+		password:  password,
+		respKeyNT: NTOWFv2(password, user, domain),
+		respKeyLM: LMOWFv2(password, user, domain),
+	}
+}
+
+// generate first handshake messgae
+func (n *NTLMv2) GetNegotiateMessage() *NegotiateMessage {
+	negoMsg := NewNegotiateMessage()
+	negoMsg.NegotiateFlags = NTLMSSP_NEGOTIATE_KEY_EXCH |
+		NTLMSSP_NEGOTIATE_128 |
+		NTLMSSP_NEGOTIATE_EXTENDED_SESSIONSECURITY |
+		NTLMSSP_NEGOTIATE_ALWAYS_SIGN |
+		NTLMSSP_NEGOTIATE_NTLM |
+		NTLMSSP_NEGOTIATE_SEAL |
+		NTLMSSP_NEGOTIATE_SIGN |
+		NTLMSSP_REQUEST_TARGET |
+		NTLMSSP_NEGOTIATE_UNICODE
+	n.negotiateMessage = negoMsg
+	return n.negotiateMessage
+}
+
+// process NTLMv2 Authenticate hash
+func (n *NTLMv2) ComputeResponseV2(respKeyNT, respKeyLM, serverChallenge, clientChallenge,
+	timestamp, serverInfo []byte) (ntChallResp, lmChallResp, SessBaseKey []byte) {
+
+	tempBuff := &bytes.Buffer{}
+	tempBuff.Write([]byte{0x01, 0x01}) // Responser version, HiResponser version
+	tempBuff.Write([]byte{0x00, 0x00, 0x00, 0x00, 0x00, 0x00})
+	tempBuff.Write(timestamp)
+	tempBuff.Write(clientChallenge)
+	tempBuff.Write([]byte{0x00, 0x00, 0x00, 0x00})
+	tempBuff.Write(serverInfo)
+	tempBuff.Write([]byte{0x00, 0x00, 0x00, 0x00})
+
+	ntBuf := bytes.NewBuffer(serverChallenge)
+	ntBuf.Write(tempBuff.Bytes())
+	ntProof := HMAC_MD5(respKeyNT, ntBuf.Bytes())
+
+	ntChallResp = make([]byte, 0, len(ntProof)+tempBuff.Len())
+	ntChallResp = append(ntChallResp, ntProof...)
+	ntChallResp = append(ntChallResp, tempBuff.Bytes()...)
+
+	lmBuf := bytes.NewBuffer(serverChallenge)
+	lmBuf.Write(clientChallenge)
+	lmChallResp = HMAC_MD5(respKeyLM, lmBuf.Bytes())
+	lmChallResp = append(lmChallResp, clientChallenge...)
+
+	SessBaseKey = HMAC_MD5(respKeyNT, ntProof)
+	return
+}
+
+func MIC(exportedSessionKey []byte, negotiateMessage, challengeMessage, authenticateMessage Message) []byte {
+	buff := bytes.Buffer{}
+	buff.Write(negotiateMessage.Serialize())
+	buff.Write(challengeMessage.Serialize())
+	buff.Write(authenticateMessage.Serialize())
+	return HMAC_MD5(exportedSessionKey, buff.Bytes())
+}
+
+func concat(bs ...[]byte) []byte {
+	return bytes.Join(bs, nil)
+}
+
+var (
+	clientSigning = concat([]byte("session key to client-to-server signing key magic constant"), []byte{0x00})
+	serverSigning = concat([]byte("session key to server-to-client signing key magic constant"), []byte{0x00})
+	clientSealing = concat([]byte("session key to client-to-server sealing key magic constant"), []byte{0x00})
+	serverSealing = concat([]byte("session key to server-to-client sealing key magic constant"), []byte{0x00})
+)
+
+func (n *NTLMv2) GetAuthenticateMessage(s []byte) (*AuthenticateMessage, *NTLMv2Security) {
+	challengeMsg := &ChallengeMessage{}
+	r := bytes.NewReader(s)
+	err := struc.Unpack(r, challengeMsg)
+	if err != nil {
+		glog.Error("read challengeMsg", err)
+		return nil, nil
+	}
+	if challengeMsg.NegotiateFlags&NTLMSSP_NEGOTIATE_VERSION != 0 {
+		version := NVersion{}
+		err := struc.Unpack(r, &version)
+		if err != nil {
+			glog.Error("read version", err)
+			return nil, nil
+		}
+		challengeMsg.Version = version
+	}
+	challengeMsg.Payload, _ = core.ReadBytes(r.Len(), r)
+	n.challengeMessage = challengeMsg
+	glog.Debugf("challengeMsg:%+v", challengeMsg)
+
+	serverName := challengeMsg.getTargetName()
+	serverInfo := challengeMsg.getTargetInfo()
+	timestamp := challengeMsg.getTargetInfoTimestamp(serverInfo)
+	computeMIC := false
+	if timestamp == nil {
+		ft := uint64(time.Now().UnixNano()) / 100
+		ft += 116444736000000000 // add time between unix & windows offset
+		timestamp = make([]byte, 8)
+		binary.LittleEndian.PutUint64(timestamp, ft)
+	} else {
+		computeMIC = true
+	}
+	glog.Infof("serverName=%+v", core.UnicodeDecode(serverName))
+	serverChallenge := challengeMsg.ServerChallenge[:]
+	clientChallenge := core.Random(8)
+	ntChallengeResponse, lmChallengeResponse, SessionBaseKey := n.ComputeResponseV2(
+		n.respKeyNT, n.respKeyLM, serverChallenge, clientChallenge, timestamp, serverInfo)
+
+	exchangeKey := SessionBaseKey
+	exportedSessionKey := core.Random(16)
+	EncryptedRandomSessionKey := make([]byte, len(exportedSessionKey))
+	rc, _ := rc4.NewCipher(exchangeKey)
+	rc.XORKeyStream(EncryptedRandomSessionKey, exportedSessionKey)
+
+	if challengeMsg.NegotiateFlags&NTLMSSP_NEGOTIATE_UNICODE != 0 {
+		n.enableUnicode = true
+	}
+	glog.Infof("user: %s, passwd:%s", n.user, n.password)
+	domain, user, _ := n.GetEncodedCredentials()
+
+	n.authenticateMessage = NewAuthenticateMessage(challengeMsg.NegotiateFlags,
+		domain, user, []byte(""), lmChallengeResponse, ntChallengeResponse, EncryptedRandomSessionKey)
+
+	if computeMIC {
+		copy(n.authenticateMessage.MIC[:], MIC(exportedSessionKey, n.negotiateMessage, n.challengeMessage, n.authenticateMessage)[:16])
+	}
+
+	md := md5.New()
+	//ClientSigningKey
+	a := concat(exportedSessionKey, clientSigning)
+	md.Write(a)
+	ClientSigningKey := md.Sum(nil)
+	//ServerSigningKey
+	md.Reset()
+	a = concat(exportedSessionKey, serverSigning)
+	md.Write(a)
+	ServerSigningKey := md.Sum(nil)
+	//ClientSealingKey
+	md.Reset()
+	a = concat(exportedSessionKey, clientSealing)
+	md.Write(a)
+	ClientSealingKey := md.Sum(nil)
+	//ServerSealingKey
+	md.Reset()
+	a = concat(exportedSessionKey, serverSealing)
+	md.Write(a)
+	ServerSealingKey := md.Sum(nil)
+
+	glog.Debugf("ClientSigningKey:%s", hex.EncodeToString(ClientSigningKey))
+	glog.Debugf("ServerSigningKey:%s", hex.EncodeToString(ServerSigningKey))
+	glog.Debugf("ClientSealingKey:%s", hex.EncodeToString(ClientSealingKey))
+	glog.Debugf("ServerSealingKey:%s", hex.EncodeToString(ServerSealingKey))
+
+	encryptRC4, _ := rc4.NewCipher(ClientSealingKey)
+	decryptRC4, _ := rc4.NewCipher(ServerSealingKey)
+
+	ntlmSec := &NTLMv2Security{encryptRC4, decryptRC4, ClientSigningKey, ServerSigningKey, 0}
+
+	return n.authenticateMessage, ntlmSec
+}
+
+func (n *NTLMv2) GetEncodedCredentials() ([]byte, []byte, []byte) {
+	if n.enableUnicode {
+		return core.UnicodeEncode(n.domain), core.UnicodeEncode(n.user), core.UnicodeEncode(n.password)
+	}
+	return []byte(n.domain), []byte(n.user), []byte(n.password)
+}
+
+type NTLMv2Security struct {
+	EncryptRC4 *rc4.Cipher
+	DecryptRC4 *rc4.Cipher
+	SigningKey []byte
+	VerifyKey  []byte
+	SeqNum     uint32
+}
+
+func (n *NTLMv2Security) GssEncrypt(s []byte) []byte {
+	p := make([]byte, len(s))
+	n.EncryptRC4.XORKeyStream(p, s)
+	b := &bytes.Buffer{}
+
+	//signature
+	core.WriteUInt32LE(n.SeqNum, b)
+	core.WriteBytes(s, b)
+	s1 := HMAC_MD5(n.SigningKey, b.Bytes())[:8]
+	checksum := make([]byte, 8)
+	n.EncryptRC4.XORKeyStream(checksum, s1)
+	b.Reset()
+	core.WriteUInt32LE(0x00000001, b)
+	core.WriteBytes(checksum, b)
+	core.WriteUInt32LE(n.SeqNum, b)
+
+	core.WriteBytes(p, b)
+
+	n.SeqNum++
+
+	return b.Bytes()
+}
+func (n *NTLMv2Security) GssDecrypt(s []byte) []byte {
+	r := bytes.NewReader(s)
+	core.ReadUInt32LE(r) //version
+	checksum, _ := core.ReadBytes(8, r)
+	seqNum, _ := core.ReadUInt32LE(r)
+	data, _ := core.ReadBytes(r.Len(), r)
+
+	p := make([]byte, len(data))
+	n.DecryptRC4.XORKeyStream(p, data)
+
+	check := make([]byte, len(checksum))
+	n.DecryptRC4.XORKeyStream(check, checksum)
+
+	b := &bytes.Buffer{}
+	core.WriteUInt32LE(seqNum, b)
+	core.WriteBytes(p, b)
+	verify := HMAC_MD5(n.VerifyKey, b.Bytes())
+	if string(verify) != string(check) {
+		return nil
+	}
+	return p
+}
@@ -0,0 +1,760 @@
+package pdu
+
+import (
+	"bytes"
+	"encoding/hex"
+	"errors"
+	"fmt"
+	"io"
+
+	"github.com/shadow1ng/fscan/libs/grdp/glog"
+
+	"github.com/lunixbochs/struc"
+	"github.com/shadow1ng/fscan/libs/grdp/core"
+	"github.com/shadow1ng/fscan/libs/grdp/protocol/t125/gcc"
+)
+
+type CapsType uint16
+
+const (
+	CAPSTYPE_GENERAL                 CapsType = 0x0001
+	CAPSTYPE_BITMAP                           = 0x0002
+	CAPSTYPE_ORDER                            = 0x0003
+	CAPSTYPE_BITMAPCACHE                      = 0x0004
+	CAPSTYPE_CONTROL                          = 0x0005
+	CAPSTYPE_ACTIVATION                       = 0x0007
+	CAPSTYPE_POINTER                          = 0x0008
+	CAPSTYPE_SHARE                            = 0x0009
+	CAPSTYPE_COLORCACHE                       = 0x000A
+	CAPSTYPE_SOUND                            = 0x000C
+	CAPSTYPE_INPUT                            = 0x000D
+	CAPSTYPE_FONT                             = 0x000E
+	CAPSTYPE_BRUSH                            = 0x000F
+	CAPSTYPE_GLYPHCACHE                       = 0x0010
+	CAPSTYPE_OFFSCREENCACHE                   = 0x0011
+	CAPSTYPE_BITMAPCACHE_HOSTSUPPORT          = 0x0012
+	CAPSTYPE_BITMAPCACHE_REV2                 = 0x0013
+	CAPSTYPE_VIRTUALCHANNEL                   = 0x0014
+	CAPSTYPE_DRAWNINEGRIDCACHE                = 0x0015
+	CAPSTYPE_DRAWGDIPLUS                      = 0x0016
+	CAPSTYPE_RAIL                             = 0x0017
+	CAPSTYPE_WINDOW                           = 0x0018
+	CAPSETTYPE_COMPDESK                       = 0x0019
+	CAPSETTYPE_MULTIFRAGMENTUPDATE            = 0x001A
+	CAPSETTYPE_LARGE_POINTER                  = 0x001B
+	CAPSETTYPE_SURFACE_COMMANDS               = 0x001C
+	CAPSETTYPE_BITMAP_CODECS                  = 0x001D
+	CAPSSETTYPE_FRAME_ACKNOWLEDGE             = 0x001E
+)
+
+func (c CapsType) String() string {
+	switch c {
+	case CAPSTYPE_GENERAL:
+		return "CAPSTYPE_GENERAL"
+	case CAPSTYPE_BITMAP:
+		return "CAPSTYPE_BITMAP"
+	case CAPSTYPE_ORDER:
+		return "CAPSTYPE_ORDER"
+	case CAPSTYPE_BITMAPCACHE:
+		return "CAPSTYPE_BITMAPCACHE"
+	case CAPSTYPE_CONTROL:
+		return "CAPSTYPE_CONTROL"
+	case CAPSTYPE_ACTIVATION:
+		return "CAPSTYPE_ACTIVATION"
+	case CAPSTYPE_POINTER:
+		return "CAPSTYPE_POINTER"
+	case CAPSTYPE_SHARE:
+		return "CAPSTYPE_SHARE"
+	case CAPSTYPE_COLORCACHE:
+		return "CAPSTYPE_COLORCACHE"
+	case CAPSTYPE_SOUND:
+		return "CAPSTYPE_SOUND"
+	case CAPSTYPE_INPUT:
+		return "CAPSTYPE_INPUT"
+	case CAPSTYPE_FONT:
+		return "CAPSTYPE_FONT"
+	case CAPSTYPE_BRUSH:
+		return "CAPSTYPE_BRUSH"
+	case CAPSTYPE_GLYPHCACHE:
+		return "CAPSTYPE_GLYPHCACHE"
+	case CAPSTYPE_OFFSCREENCACHE:
+		return "CAPSTYPE_OFFSCREENCACHE"
+	case CAPSTYPE_BITMAPCACHE_HOSTSUPPORT:
+		return "CAPSTYPE_BITMAPCACHE_HOSTSUPPORT"
+	case CAPSTYPE_BITMAPCACHE_REV2:
+		return "CAPSTYPE_BITMAPCACHE_REV2"
+	case CAPSTYPE_VIRTUALCHANNEL:
+		return "CAPSTYPE_VIRTUALCHANNEL"
+	case CAPSTYPE_DRAWNINEGRIDCACHE:
+		return "CAPSTYPE_DRAWNINEGRIDCACHE"
+	case CAPSTYPE_DRAWGDIPLUS:
+		return "CAPSTYPE_DRAWGDIPLUS"
+	case CAPSTYPE_RAIL:
+		return "CAPSTYPE_RAIL"
+	case CAPSTYPE_WINDOW:
+		return "CAPSTYPE_WINDOW"
+	case CAPSETTYPE_COMPDESK:
+		return "CAPSETTYPE_COMPDESK"
+	case CAPSETTYPE_MULTIFRAGMENTUPDATE:
+		return "CAPSETTYPE_MULTIFRAGMENTUPDATE"
+	case CAPSETTYPE_LARGE_POINTER:
+		return "CAPSETTYPE_LARGE_POINTER"
+	case CAPSETTYPE_SURFACE_COMMANDS:
+		return "CAPSETTYPE_SURFACE_COMMANDS"
+	case CAPSETTYPE_BITMAP_CODECS:
+		return "CAPSETTYPE_BITMAP_CODECS"
+	case CAPSSETTYPE_FRAME_ACKNOWLEDGE:
+		return "CAPSSETTYPE_FRAME_ACKNOWLEDGE"
+	}
+
+	return "Unknown"
+}
+
+type MajorType uint16
+
+const (
+	OSMAJORTYPE_UNSPECIFIED MajorType = 0x0000
+	OSMAJORTYPE_WINDOWS               = 0x0001
+	OSMAJORTYPE_OS2                   = 0x0002
+	OSMAJORTYPE_MACINTOSH             = 0x0003
+	OSMAJORTYPE_UNIX                  = 0x0004
+	OSMAJORTYPE_IOS                   = 0x0005
+	OSMAJORTYPE_OSX                   = 0x0006
+	OSMAJORTYPE_ANDROID               = 0x0007
+)
+
+type MinorType uint16
+
+const (
+	OSMINORTYPE_UNSPECIFIED    MinorType = 0x0000
+	OSMINORTYPE_WINDOWS_31X              = 0x0001
+	OSMINORTYPE_WINDOWS_95               = 0x0002
+	OSMINORTYPE_WINDOWS_NT               = 0x0003
+	OSMINORTYPE_OS2_V21                  = 0x0004
+	OSMINORTYPE_POWER_PC                 = 0x0005
+	OSMINORTYPE_MACINTOSH                = 0x0006
+	OSMINORTYPE_NATIVE_XSERVER           = 0x0007
+	OSMINORTYPE_PSEUDO_XSERVER           = 0x0008
+	OSMINORTYPE_WINDOWS_RT               = 0x0009
+)
+
+const (
+	FASTPATH_OUTPUT_SUPPORTED  uint16 = 0x0001
+	NO_BITMAP_COMPRESSION_HDR         = 0x0400
+	LONG_CREDENTIALS_SUPPORTED        = 0x0004
+	AUTORECONNECT_SUPPORTED           = 0x0008
+	ENC_SALTED_CHECKSUM               = 0x0010
+)
+
+type OrderFlag uint16
+
+const (
+	NEGOTIATEORDERSUPPORT   OrderFlag = 0x0002
+	ZEROBOUNDSDELTASSUPPORT           = 0x0008
+	COLORINDEXSUPPORT                 = 0x0020
+	SOLIDPATTERNBRUSHONLY             = 0x0040
+	ORDERFLAGS_EXTRA_FLAGS            = 0x0080
+)
+
+/**
+ * @see http://msdn.microsoft.com/en-us/library/cc240556.aspx
+ */
+type Order uint8
+
+const (
+	TS_NEG_DSTBLT_INDEX             Order = 0x00
+	TS_NEG_PATBLT_INDEX                   = 0x01
+	TS_NEG_SCRBLT_INDEX                   = 0x02
+	TS_NEG_MEMBLT_INDEX                   = 0x03
+	TS_NEG_MEM3BLT_INDEX                  = 0x04
+	TS_NEG_DRAWNINEGRID_INDEX             = 0x07
+	TS_NEG_LINETO_INDEX                   = 0x08
+	TS_NEG_MULTI_DRAWNINEGRID_INDEX       = 0x09
+	TS_NEG_SAVEBITMAP_INDEX               = 0x0B
+	TS_NEG_MULTIDSTBLT_INDEX              = 0x0F
+	TS_NEG_MULTIPATBLT_INDEX              = 0x10
+	TS_NEG_MULTISCRBLT_INDEX              = 0x11
+	TS_NEG_MULTIOPAQUERECT_INDEX          = 0x12
+	TS_NEG_FAST_INDEX_INDEX               = 0x13
+	TS_NEG_POLYGON_SC_INDEX               = 0x14
+	TS_NEG_POLYGON_CB_INDEX               = 0x15
+	TS_NEG_POLYLINE_INDEX                 = 0x16
+	TS_NEG_FAST_GLYPH_INDEX               = 0x18
+	TS_NEG_ELLIPSE_SC_INDEX               = 0x19
+	TS_NEG_ELLIPSE_CB_INDEX               = 0x1A
+	TS_NEG_GLYPH_INDEX_INDEX              = 0x1B
+)
+
+type OrderEx uint16
+
+const (
+	ORDERFLAGS_EX_CACHE_BITMAP_REV3_SUPPORT   OrderEx = 0x0002
+	ORDERFLAGS_EX_ALTSEC_FRAME_MARKER_SUPPORT         = 0x0004
+)
+
+/**
+ * @see http://msdn.microsoft.com/en-us/library/cc240563.aspx
+ */
+
+const (
+	INPUT_FLAG_SCANCODES       uint16 = 0x0001
+	INPUT_FLAG_MOUSEX                 = 0x0004
+	INPUT_FLAG_FASTPATH_INPUT         = 0x0008
+	INPUT_FLAG_UNICODE                = 0x0010
+	INPUT_FLAG_FASTPATH_INPUT2        = 0x0020
+	INPUT_FLAG_UNUSED1                = 0x0040
+	INPUT_FLAG_UNUSED2                = 0x0080
+	INPUT_FLAG_MOUSE_HWHEEL           = 0x0100
+)
+
+/**
+ * @see http://msdn.microsoft.com/en-us/library/cc240564.aspx
+ */
+type BrushSupport uint32
+
+const (
+	BRUSH_DEFAULT    BrushSupport = 0x00000000
+	BRUSH_COLOR_8x8               = 0x00000001
+	BRUSH_COLOR_FULL              = 0x00000002
+)
+
+/**
+ * @see http://msdn.microsoft.com/en-us/library/cc240565.aspx
+ */
+type GlyphSupport uint16
+
+const (
+	GLYPH_SUPPORT_NONE    GlyphSupport = 0x0000
+	GLYPH_SUPPORT_PARTIAL              = 0x0001
+	GLYPH_SUPPORT_FULL                 = 0x0002
+	GLYPH_SUPPORT_ENCODE               = 0x0003
+)
+
+/**
+ * @see http://msdn.microsoft.com/en-us/library/cc240550.aspx
+ */
+type OffscreenSupportLevel uint32
+
+const (
+	OSL_FALSE OffscreenSupportLevel = 0x00000000
+	OSL_TRUE                        = 0x00000001
+)
+
+/**
+ * @see http://msdn.microsoft.com/en-us/library/cc240551.aspx
+ */
+type VirtualChannelCompressionFlag uint32
+
+const (
+	VCCAPS_NO_COMPR    VirtualChannelCompressionFlag = 0x00000000
+	VCCAPS_COMPR_SC                                  = 0x00000001
+	VCCAPS_COMPR_CS_8K                               = 0x00000002
+)
+
+type SoundFlag uint16
+
+const (
+	SOUND_NONE       SoundFlag = 0x0000
+	SOUND_BEEPS_FLAG           = 0x0001
+)
+
+type RailsupportLevel uint32
+
+const (
+	RAIL_LEVEL_SUPPORTED                           = 0x00000001
+	RAIL_LEVEL_DOCKED_LANGBAR_SUPPORTED            = 0x00000002
+	RAIL_LEVEL_SHELL_INTEGRATION_SUPPORTED         = 0x00000004
+	RAIL_LEVEL_LANGUAGE_IME_SYNC_SUPPORTED         = 0x00000008
+	RAIL_LEVEL_SERVER_TO_CLIENT_IME_SYNC_SUPPORTED = 0x00000010
+	RAIL_LEVEL_HIDE_MINIMIZED_APPS_SUPPORTED       = 0x00000020
+	RAIL_LEVEL_WINDOW_CLOAKING_SUPPORTED           = 0x00000040
+	RAIL_LEVEL_HANDSHAKE_EX_SUPPORTED              = 0x00000080
+)
+
+const (
+	INPUT_EVENT_SYNC     = 0x0000
+	INPUT_EVENT_UNUSED   = 0x0002
+	INPUT_EVENT_SCANCODE = 0x0004
+	INPUT_EVENT_UNICODE  = 0x0005
+	INPUT_EVENT_MOUSE    = 0x8001
+	INPUT_EVENT_MOUSEX   = 0x8002
+)
+
+const (
+	PTRFLAGS_HWHEEL         = 0x0400
+	PTRFLAGS_WHEEL          = 0x0200
+	PTRFLAGS_WHEEL_NEGATIVE = 0x0100
+	WheelRotationMask       = 0x01FF
+	PTRFLAGS_MOVE           = 0x0800
+	PTRFLAGS_DOWN           = 0x8000
+	PTRFLAGS_BUTTON1        = 0x1000
+	PTRFLAGS_BUTTON2        = 0x2000
+	PTRFLAGS_BUTTON3        = 0x4000
+)
+
+const (
+	KBDFLAGS_EXTENDED = 0x0100
+	KBDFLAGS_DOWN     = 0x4000
+	KBDFLAGS_RELEASE  = 0x8000
+)
+
+type SurfaceCmdFlags uint32
+
+const (
+	SURFCMDS_SET_SURFACE_BITS    = 0x00000002
+	SURFCMDS_FRAME_MARKER        = 0x00000010
+	SURFCMDS_STREAM_SURFACE_BITS = 0x00000040
+)
+
+type Capability interface {
+	Type() CapsType
+}
+
+type GeneralCapability struct {
+	// 010018000100030000020000000015040000000000000000
+	OSMajorType             MajorType `struc:"little"`
+	OSMinorType             MinorType `struc:"little"`
+	ProtocolVersion         uint16    `struc:"little"`
+	Pad2octetsA             uint16    `struc:"little"`
+	GeneralCompressionTypes uint16    `struc:"little"`
+	ExtraFlags              uint16    `struc:"little"`
+	UpdateCapabilityFlag    uint16    `struc:"little"`
+	RemoteUnshareFlag       uint16    `struc:"little"`
+	GeneralCompressionLevel uint16    `struc:"little"`
+	RefreshRectSupport      uint8     `struc:"little"`
+	SuppressOutputSupport   uint8     `struc:"little"`
+}
+
+func (*GeneralCapability) Type() CapsType {
+	return CAPSTYPE_GENERAL
+}
+
+type BitmapCapability struct {
+	// 02001c00180001000100010000052003000000000100000001000000
+	PreferredBitsPerPixel    gcc.HighColor `struc:"little"`
+	Receive1BitPerPixel      uint16        `struc:"little"`
+	Receive4BitsPerPixel     uint16        `struc:"little"`
+	Receive8BitsPerPixel     uint16        `struc:"little"`
+	DesktopWidth             uint16        `struc:"little"`
+	DesktopHeight            uint16        `struc:"little"`
+	Pad2octets               uint16        `struc:"little"`
+	DesktopResizeFlag        uint16        `struc:"little"`
+	BitmapCompressionFlag    uint16        `struc:"little"`
+	HighColorFlags           uint8         `struc:"little"`
+	DrawingFlags             uint8         `struc:"little"`
+	MultipleRectangleSupport uint16        `struc:"little"`
+	Pad2octetsB              uint16        `struc:"little"`
+}
+
+func (*BitmapCapability) Type() CapsType {
+	return CAPSTYPE_BITMAP
+}
+
+type BitmapCacheCapability struct {
+	// 04002800000000000000000000000000000000000000000000000000000000000000000000000000
+	Pad1                  uint32 `struc:"little"`
+	Pad2                  uint32 `struc:"little"`
+	Pad3                  uint32 `struc:"little"`
+	Pad4                  uint32 `struc:"little"`
+	Pad5                  uint32 `struc:"little"`
+	Pad6                  uint32 `struc:"little"`
+	Cache0Entries         uint16 `struc:"little"`
+	Cache0MaximumCellSize uint16 `struc:"little"`
+	Cache1Entries         uint16 `struc:"little"`
+	Cache1MaximumCellSize uint16 `struc:"little"`
+	Cache2Entries         uint16 `struc:"little"`
+	Cache2MaximumCellSize uint16 `struc:"little"`
+}
+
+func (*BitmapCacheCapability) Type() CapsType {
+	return CAPSTYPE_BITMAPCACHE
+}
+
+type OrderCapability struct {
+	// 030058000000000000000000000000000000000000000000010014000000010000000a0000000000000000000000000000000000000000000000000000000000000000000000000000000000008403000000000000000000
+	TerminalDescriptor      [16]byte
+	Pad4octetsA             uint32    `struc:"little"`
+	DesktopSaveXGranularity uint16    `struc:"little"`
+	DesktopSaveYGranularity uint16    `struc:"little"`
+	Pad2octetsA             uint16    `struc:"little"`
+	MaximumOrderLevel       uint16    `struc:"little"`
+	NumberFonts             uint16    `struc:"little"`
+	OrderFlags              OrderFlag `struc:"little"`
+	OrderSupport            [32]byte
+	TextFlags               uint16 `struc:"little"`
+	OrderSupportExFlags     uint16 `struc:"little"`
+	Pad4octetsB             uint32 `struc:"little"`
+	DesktopSaveSize         uint32 `struc:"little"`
+	Pad2octetsC             uint16 `struc:"little"`
+	Pad2octetsD             uint16 `struc:"little"`
+	TextANSICodePage        uint16 `struc:"little"`
+	Pad2octetsE             uint16 `struc:"little"`
+}
+
+func (*OrderCapability) Type() CapsType {
+	return CAPSTYPE_ORDER
+}
+
+type PointerCapability struct {
+	ColorPointerFlag      uint16 `struc:"little"`
+	ColorPointerCacheSize uint16 `struc:"little"`
+	// old version of rdp doesn't support ...
+	PointerCacheSize uint16 `struc:"little"` // only server need
+}
+
+func (*PointerCapability) Type() CapsType {
+	return CAPSTYPE_POINTER
+}
+
+type InputCapability struct {
+	// 0d005c001500000009040000040000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000c000000
+	Flags       uint16 `struc:"little"`
+	Pad2octetsA uint16 `struc:"little"`
+	// same value as gcc.ClientCoreSettings.kbdLayout
+	KeyboardLayout gcc.KeyboardLayout `struc:"little"`
+	// same value as gcc.ClientCoreSettings.keyboardType
+	KeyboardType uint32 `struc:"little"`
+	// same value as gcc.ClientCoreSettings.keyboardSubType
+	KeyboardSubType uint32 `struc:"little"`
+	// same value as gcc.ClientCoreSettings.keyboardFnKeys
+	KeyboardFunctionKey uint32 `struc:"little"`
+	// same value as gcc.ClientCoreSettingrrs.imeFileName
+	ImeFileName [64]byte
+	//need add 0c000000 in the end
+}
+
+func (*InputCapability) Type() CapsType {
+	return CAPSTYPE_INPUT
+}
+
+type BrushCapability struct {
+	// 0f00080000000000
+	SupportLevel BrushSupport `struc:"little"`
+}
+
+func (*BrushCapability) Type() CapsType {
+	return CAPSTYPE_BRUSH
+}
+
+type cacheEntry struct {
+	Entries         uint16 `struc:"little"`
+	MaximumCellSize uint16 `struc:"little"`
+}
+
+type GlyphCapability struct {
+	// 10003400000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
+	GlyphCache   [10]cacheEntry `struc:"little"`
+	FragCache    uint32         `struc:"little"`
+	SupportLevel GlyphSupport   `struc:"little"`
+	Pad2octets   uint16         `struc:"little"`
+}
+
+func (*GlyphCapability) Type() CapsType {
+	return CAPSTYPE_GLYPHCACHE
+}
+
+type OffscreenBitmapCacheCapability struct {
+	// 11000c000000000000000000
+	SupportLevel OffscreenSupportLevel `struc:"little"`
+	CacheSize    uint16                `struc:"little"`
+	CacheEntries uint16                `struc:"little"`
+}
+
+func (*OffscreenBitmapCacheCapability) Type() CapsType {
+	return CAPSTYPE_OFFSCREENCACHE
+}
+
+type BitmapCache2Capability struct {
+	BitmapCachePersist uint16   `struc:"little"`
+	Pad2octets         uint8    `struc:"little"`
+	CachesNum          uint8    `struc:"little"`
+	BmpC0Cells         uint32   `struc:"little"`
+	BmpC1Cells         uint32   `struc:"little"`
+	BmpC2Cells         uint32   `struc:"little"`
+	BmpC3Cells         uint32   `struc:"little"`
+	BmpC4Cells         uint32   `struc:"little"`
+	Pad2octets1        [12]byte `struc:"little"`
+}
+
+func (*BitmapCache2Capability) Type() CapsType {
+	return CAPSTYPE_BITMAPCACHE_REV2
+}
+
+type VirtualChannelCapability struct {
+	// 14000c000000000000000000
+	Flags       VirtualChannelCompressionFlag `struc:"little"`
+	VCChunkSize uint32                        `struc:"little"` // optional
+}
+
+func (*VirtualChannelCapability) Type() CapsType {
+	return CAPSTYPE_VIRTUALCHANNEL
+}
+
+type SoundCapability struct {
+	// 0c00080000000000
+	Flags      SoundFlag `struc:"little"`
+	Pad2octets uint16    `struc:"little"`
+}
+
+func (*SoundCapability) Type() CapsType {
+	return CAPSTYPE_SOUND
+}
+
+type ControlCapability struct {
+	ControlFlags     uint16 `struc:"little"`
+	RemoteDetachFlag uint16 `struc:"little"`
+	ControlInterest  uint16 `struc:"little"`
+	DetachInterest   uint16 `struc:"little"`
+}
+
+func (*ControlCapability) Type() CapsType {
+	return CAPSTYPE_CONTROL
+}
+
+type WindowActivationCapability struct {
+	HelpKeyFlag          uint16 `struc:"little"`
+	HelpKeyIndexFlag     uint16 `struc:"little"`
+	HelpExtendedKeyFlag  uint16 `struc:"little"`
+	WindowManagerKeyFlag uint16 `struc:"little"`
+}
+
+func (*WindowActivationCapability) Type() CapsType {
+	return CAPSTYPE_ACTIVATION
+}
+
+type FontCapability struct {
+	SupportFlags uint16 `struc:"little"`
+	Pad2octets   uint16 `struc:"little"`
+}
+
+func (*FontCapability) Type() CapsType {
+	return CAPSTYPE_FONT
+}
+
+type ColorCacheCapability struct {
+	CacheSize  uint16 `struc:"little"`
+	Pad2octets uint16 `struc:"little"`
+}
+
+func (*ColorCacheCapability) Type() CapsType {
+	return CAPSTYPE_COLORCACHE
+}
+
+type ShareCapability struct {
+	NodeId     uint16 `struc:"little"`
+	Pad2octets uint16 `struc:"little"`
+}
+
+func (*ShareCapability) Type() CapsType {
+	return CAPSTYPE_SHARE
+}
+
+type MultiFragmentUpdate struct {
+	// 1a00080000000000
+	MaxRequestSize uint32 `struc:"little"`
+}
+
+func (*MultiFragmentUpdate) Type() CapsType {
+	return CAPSETTYPE_MULTIFRAGMENTUPDATE
+}
+
+// see https://docs.microsoft.com/en-us/openspecs/windows_protocols/ms-rdpegdi/52635737-d144-4f47-9c88-b48ceaf3efb4
+
+type DrawGDIPlusCapability struct {
+	SupportLevel             uint32
+	GdipVersion              uint32
+	CacheLevel               uint32
+	GdipCacheEntries         [10]byte
+	GdipCacheChunkSize       [8]byte
+	GdipImageCacheProperties [6]byte
+}
+
+func (*DrawGDIPlusCapability) Type() CapsType {
+	return CAPSTYPE_DRAWGDIPLUS
+}
+
+// see https://docs.microsoft.com/en-us/openspecs/windows_protocols/ms-rdpbcgr/86507fed-a0ee-4242-b802-237534a8f65e
+type BitmapCodec struct {
+	GUID             [16]byte
+	ID               uint8
+	PropertiesLength uint16 `struc:"little,sizeof=Properties"`
+	Properties       []byte
+}
+
+// see https://docs.microsoft.com/en-us/openspecs/windows_protocols/ms-rdpbcgr/408b1878-9f6e-4106-8329-1af42219ba6a
+type BitmapCodecS struct {
+	Count uint8 `struc:"sizeof=Array"`
+	Array []BitmapCodec
+}
+
+// see https://docs.microsoft.com/en-us/openspecs/windows_protocols/ms-rdpbcgr/17e80f50-d163-49de-a23b-fd6456aa472f
+type BitmapCodecsCapability struct {
+	SupportedBitmapCodecs BitmapCodecS // A variable-length field containing a TS_BITMAPCODECS structure (section 2.2.7.2.10.1).
+}
+
+func (*BitmapCodecsCapability) Type() CapsType {
+	return CAPSETTYPE_BITMAP_CODECS
+}
+
+// see https://docs.microsoft.com/en-us/openspecs/windows_protocols/ms-rdpbcgr/fc05c385-46c3-42cb-9ed2-c475a3990e0b
+type BitmapCacheHostSupportCapability struct {
+	CacheVersion uint8
+	Pad1         uint8
+	Pad2         uint16
+}
+
+func (*BitmapCacheHostSupportCapability) Type() CapsType {
+	return CAPSTYPE_BITMAPCACHE_HOSTSUPPORT
+}
+
+// see https://docs.microsoft.com/en-us/openspecs/windows_protocols/ms-rdpbcgr/41323437-c753-460e-8108-495a6fdd68a8
+type LargePointerCapability struct {
+	SupportFlags uint16 `struc:"little"`
+}
+
+func (*LargePointerCapability) Type() CapsType {
+	return CAPSETTYPE_LARGE_POINTER
+}
+
+// see https://docs.microsoft.com/en-us/openspecs/windows_protocols/ms-rdperp/36a25e21-25e1-4954-aae8-09aaf6715c79
+type RemoteProgramsCapability struct {
+	RailSupportLevel uint32 `struc:"little"`
+}
+
+func (*RemoteProgramsCapability) Type() CapsType {
+	return CAPSTYPE_RAIL
+}
+
+// see https://docs.microsoft.com/en-us/openspecs/windows_protocols/ms-rdperp/82ec7a69-f7e3-4294-830d-666178b35d15
+type WindowListCapability struct {
+	WndSupportLevel     uint32 `struc:"little"`
+	NumIconCaches       uint8
+	NumIconCacheEntries uint16 `struc:"little"`
+}
+
+func (*WindowListCapability) Type() CapsType {
+	return CAPSTYPE_WINDOW
+}
+
+// see https://docs.microsoft.com/en-us/openspecs/windows_protocols/ms-rdpbcgr/9132002f-f133-4a0f-ba2f-2dc48f1e7f93
+type DesktopCompositionCapability struct {
+	CompDeskSupportLevel uint16 `struc:"little"`
+}
+
+func (*DesktopCompositionCapability) Type() CapsType {
+	return CAPSETTYPE_COMPDESK
+}
+
+// see https://docs.microsoft.com/en-us/openspecs/windows_protocols/ms-rdpbcgr/aa953018-c0a8-4761-bb12-86586c2cd56a
+type SurfaceCommandsCapability struct {
+	CmdFlags uint32 `struc:"little"`
+	Reserved uint32 `struc:"little"`
+}
+
+func (*SurfaceCommandsCapability) Type() CapsType {
+	return CAPSETTYPE_SURFACE_COMMANDS
+}
+
+type FrameAcknowledgeCapability struct {
+	FrameCount uint32 `struc:"little"`
+}
+
+func (*FrameAcknowledgeCapability) Type() CapsType {
+	return CAPSSETTYPE_FRAME_ACKNOWLEDGE
+}
+
+type DrawNineGridCapability struct {
+	SupportLevel uint32 `struc:"little"`
+	CacheSize    uint16 `struc:"little"`
+	CacheEntries uint16 `struc:"little"`
+}
+
+func (*DrawNineGridCapability) Type() CapsType {
+	return CAPSTYPE_DRAWNINEGRIDCACHE
+}
+
+func readCapability(r io.Reader) (Capability, error) {
+	capType, err := core.ReadUint16LE(r)
+	if err != nil {
+		return nil, err
+	}
+	capLen, err := core.ReadUint16LE(r)
+	if err != nil {
+		return nil, err
+	}
+	if int(capLen)-4 <= 0 {
+		return nil, errors.New(fmt.Sprintf("Capability length expected %d", capLen))
+	}
+
+	capBytes, err := core.ReadBytes(int(capLen)-4, r)
+	if err != nil {
+		return nil, err
+	}
+	capReader := bytes.NewReader(capBytes)
+	var c Capability
+	glog.Debugf("Capability type 0x%04x", capType)
+	switch CapsType(capType) {
+	case CAPSTYPE_GENERAL:
+		c = &GeneralCapability{}
+	case CAPSTYPE_BITMAP:
+		c = &BitmapCapability{}
+	case CAPSTYPE_ORDER:
+		c = &OrderCapability{}
+	case CAPSTYPE_BITMAPCACHE:
+		c = &BitmapCacheCapability{}
+	case CAPSTYPE_POINTER:
+		c = &PointerCapability{}
+	case CAPSTYPE_INPUT:
+		c = &InputCapability{}
+	case CAPSTYPE_BRUSH:
+		c = &BrushCapability{}
+	case CAPSTYPE_GLYPHCACHE:
+		c = &GlyphCapability{}
+	case CAPSTYPE_OFFSCREENCACHE:
+		c = &OffscreenBitmapCacheCapability{}
+	case CAPSTYPE_VIRTUALCHANNEL:
+		c = &VirtualChannelCapability{}
+	case CAPSTYPE_SOUND:
+		c = &SoundCapability{}
+	case CAPSTYPE_CONTROL:
+		c = &ControlCapability{}
+	case CAPSTYPE_ACTIVATION:
+		c = &WindowActivationCapability{}
+	case CAPSTYPE_FONT:
+		c = &FontCapability{}
+	case CAPSTYPE_COLORCACHE:
+		c = &ColorCacheCapability{}
+	case CAPSTYPE_SHARE:
+		c = &ShareCapability{}
+	case CAPSETTYPE_MULTIFRAGMENTUPDATE:
+		c = &MultiFragmentUpdate{}
+	case CAPSTYPE_DRAWGDIPLUS:
+		c = &DrawGDIPlusCapability{}
+	case CAPSETTYPE_BITMAP_CODECS:
+		c = &BitmapCodecsCapability{}
+	case CAPSTYPE_BITMAPCACHE_HOSTSUPPORT:
+		c = &BitmapCacheHostSupportCapability{}
+	case CAPSETTYPE_LARGE_POINTER:
+		c = &LargePointerCapability{}
+	case CAPSTYPE_RAIL:
+		c = &RemoteProgramsCapability{}
+	case CAPSTYPE_WINDOW:
+		c = &WindowListCapability{}
+	case CAPSETTYPE_COMPDESK:
+		c = &DesktopCompositionCapability{}
+	case CAPSETTYPE_SURFACE_COMMANDS:
+		c = &SurfaceCommandsCapability{}
+	case CAPSSETTYPE_FRAME_ACKNOWLEDGE:
+		c = &FrameAcknowledgeCapability{}
+	default:
+		err := errors.New(fmt.Sprintf("unsupported Capability type 0x%04x", capType))
+		glog.Error(err)
+		return nil, err
+	}
+	if err := struc.Unpack(capReader, c); err != nil {
+		glog.Error("Capability unpack error", err, fmt.Sprintf("0x%04x", capType), hex.EncodeToString(capBytes))
+		return nil, err
+	}
+	glog.Debugf("Capability<%s>: %+v", c.Type(), c)
+	return c, nil
+}
@@ -0,0 +1,465 @@
+package pdu
+
+import (
+	"bytes"
+	"encoding/hex"
+	"github.com/shadow1ng/fscan/libs/grdp/core"
+	"github.com/shadow1ng/fscan/libs/grdp/emission"
+	"github.com/shadow1ng/fscan/libs/grdp/glog"
+	"github.com/shadow1ng/fscan/libs/grdp/protocol/t125/gcc"
+)
+
+type PDULayer struct {
+	emission.Emitter
+	transport          core.Transport
+	sharedId           uint32
+	userId             uint16
+	channelId          uint16
+	serverCapabilities map[CapsType]Capability
+	clientCapabilities map[CapsType]Capability
+	fastPathSender     core.FastPathSender
+	demandActivePDU    *DemandActivePDU
+}
+
+func NewPDULayer(t core.Transport) *PDULayer {
+	p := &PDULayer{
+		Emitter:   *emission.NewEmitter(),
+		transport: t,
+		sharedId:  0x103EA,
+		serverCapabilities: map[CapsType]Capability{
+			CAPSTYPE_GENERAL: &GeneralCapability{
+				ProtocolVersion: 0x0200,
+			},
+			CAPSTYPE_BITMAP: &BitmapCapability{
+				Receive1BitPerPixel:      0x0001,
+				Receive4BitsPerPixel:     0x0001,
+				Receive8BitsPerPixel:     0x0001,
+				BitmapCompressionFlag:    0x0001,
+				MultipleRectangleSupport: 0x0001,
+			},
+			CAPSTYPE_ORDER: &OrderCapability{
+				DesktopSaveXGranularity: 1,
+				DesktopSaveYGranularity: 20,
+				MaximumOrderLevel:       1,
+				OrderFlags:              NEGOTIATEORDERSUPPORT,
+				DesktopSaveSize:         480 * 480,
+			},
+			CAPSTYPE_POINTER:        &PointerCapability{ColorPointerCacheSize: 20},
+			CAPSTYPE_INPUT:          &InputCapability{},
+			CAPSTYPE_VIRTUALCHANNEL: &VirtualChannelCapability{},
+			CAPSTYPE_FONT:           &FontCapability{SupportFlags: 0x0001},
+			CAPSTYPE_COLORCACHE:     &ColorCacheCapability{CacheSize: 0x0006},
+			CAPSTYPE_SHARE:          &ShareCapability{},
+		},
+		clientCapabilities: map[CapsType]Capability{
+			CAPSTYPE_GENERAL: &GeneralCapability{
+				ProtocolVersion: 0x0200,
+			},
+			CAPSTYPE_BITMAP: &BitmapCapability{
+				Receive1BitPerPixel:      0x0001,
+				Receive4BitsPerPixel:     0x0001,
+				Receive8BitsPerPixel:     0x0001,
+				BitmapCompressionFlag:    0x0001,
+				MultipleRectangleSupport: 0x0001,
+			},
+			CAPSTYPE_ORDER: &OrderCapability{
+				DesktopSaveXGranularity: 1,
+				DesktopSaveYGranularity: 20,
+				MaximumOrderLevel:       1,
+				OrderFlags:              NEGOTIATEORDERSUPPORT,
+				DesktopSaveSize:         480 * 480,
+				TextANSICodePage:        0x4e4,
+			},
+			CAPSTYPE_CONTROL:         &ControlCapability{0, 0, 2, 2},
+			CAPSTYPE_ACTIVATION:      &WindowActivationCapability{},
+			CAPSTYPE_POINTER:         &PointerCapability{1, 20, 20},
+			CAPSTYPE_SHARE:           &ShareCapability{},
+			CAPSTYPE_COLORCACHE:      &ColorCacheCapability{6, 0},
+			CAPSTYPE_SOUND:           &SoundCapability{0x0001, 0},
+			CAPSTYPE_INPUT:           &InputCapability{},
+			CAPSTYPE_FONT:            &FontCapability{0x0001, 0},
+			CAPSTYPE_BRUSH:           &BrushCapability{BRUSH_COLOR_8x8},
+			CAPSTYPE_GLYPHCACHE:      &GlyphCapability{},
+			CAPSETTYPE_BITMAP_CODECS: &BitmapCodecsCapability{},
+			CAPSTYPE_BITMAPCACHE_REV2: &BitmapCache2Capability{
+				BitmapCachePersist: 2,
+				CachesNum:          5,
+				BmpC0Cells:         0x258,
+				BmpC1Cells:         0x258,
+				BmpC2Cells:         0x800,
+				BmpC3Cells:         0x1000,
+				BmpC4Cells:         0x800,
+			},
+			CAPSTYPE_VIRTUALCHANNEL:        &VirtualChannelCapability{0, 1600},
+			CAPSETTYPE_MULTIFRAGMENTUPDATE: &MultiFragmentUpdate{65535},
+			CAPSTYPE_RAIL: &RemoteProgramsCapability{
+				RailSupportLevel: RAIL_LEVEL_SUPPORTED |
+					RAIL_LEVEL_SHELL_INTEGRATION_SUPPORTED |
+					RAIL_LEVEL_LANGUAGE_IME_SYNC_SUPPORTED |
+					RAIL_LEVEL_SERVER_TO_CLIENT_IME_SYNC_SUPPORTED |
+					RAIL_LEVEL_HIDE_MINIMIZED_APPS_SUPPORTED |
+					RAIL_LEVEL_WINDOW_CLOAKING_SUPPORTED |
+					RAIL_LEVEL_HANDSHAKE_EX_SUPPORTED |
+					RAIL_LEVEL_DOCKED_LANGBAR_SUPPORTED,
+			},
+			CAPSETTYPE_LARGE_POINTER: &LargePointerCapability{1},
+			CAPSETTYPE_SURFACE_COMMANDS: &SurfaceCommandsCapability{
+				CmdFlags: SURFCMDS_SET_SURFACE_BITS | SURFCMDS_STREAM_SURFACE_BITS | SURFCMDS_FRAME_MARKER,
+			},
+			CAPSSETTYPE_FRAME_ACKNOWLEDGE: &FrameAcknowledgeCapability{2},
+		},
+	}
+
+	t.On("close", func() {
+		p.Emit("close")
+	}).On("error", func(err error) {
+		p.Emit("error", err)
+	})
+	return p
+}
+
+func (p *PDULayer) sendPDU(message PDUMessage) {
+	pdu := NewPDU(p.userId, message)
+	p.transport.Write(pdu.serialize())
+}
+
+func (p *PDULayer) sendDataPDU(message DataPDUData) {
+	dataPdu := NewDataPDU(message, p.sharedId)
+	p.sendPDU(dataPdu)
+}
+
+func (p *PDULayer) SetFastPathSender(f core.FastPathSender) {
+	p.fastPathSender = f
+}
+
+type Client struct {
+	*PDULayer
+	clientCoreData *gcc.ClientCoreData
+	buff           *bytes.Buffer
+}
+
+func NewClient(t core.Transport) *Client {
+	c := &Client{
+		PDULayer: NewPDULayer(t),
+		buff:     &bytes.Buffer{},
+	}
+	c.transport.Once("connect", c.connect)
+	return c
+}
+
+func (c *Client) connect(data *gcc.ClientCoreData, userId uint16, channelId uint16) {
+	glog.Debug("pdu connect:", userId, ",", channelId)
+	c.clientCoreData = data
+	c.userId = userId
+	c.channelId = channelId
+	c.transport.Once("data", c.recvDemandActivePDU)
+}
+
+func (c *Client) recvDemandActivePDU(s []byte) {
+	glog.Trace("PDU recvDemandActivePDU", hex.EncodeToString(s))
+	r := bytes.NewReader(s)
+	pdu, err := readPDU(r)
+	if err != nil {
+		glog.Error(err)
+		return
+	}
+	if pdu.ShareCtrlHeader.PDUType != PDUTYPE_DEMANDACTIVEPDU {
+		glog.Info("PDU ignore message during connection sequence, type is", pdu.ShareCtrlHeader.PDUType)
+		c.transport.Once("data", c.recvDemandActivePDU)
+		return
+	}
+
+	c.sharedId = pdu.Message.(*DemandActivePDU).SharedId
+	c.demandActivePDU = pdu.Message.(*DemandActivePDU)
+	for _, caps := range c.demandActivePDU.CapabilitySets {
+		glog.Debugf("serverCapabilities<%s>: %+v", caps.Type(), caps)
+		c.serverCapabilities[caps.Type()] = caps
+	}
+
+	c.sendConfirmActivePDU()
+	c.sendClientFinalizeSynchronizePDU()
+	c.transport.Once("data", c.recvServerSynchronizePDU)
+}
+
+func (c *Client) sendConfirmActivePDU() {
+	glog.Debug("PDU start sendConfirmActivePDU")
+
+	pdu := NewConfirmActivePDU()
+	generalCapa := c.clientCapabilities[CAPSTYPE_GENERAL].(*GeneralCapability)
+	generalCapa.OSMajorType = OSMAJORTYPE_WINDOWS
+	generalCapa.OSMinorType = OSMINORTYPE_WINDOWS_NT
+	generalCapa.ExtraFlags = LONG_CREDENTIALS_SUPPORTED | NO_BITMAP_COMPRESSION_HDR |
+		FASTPATH_OUTPUT_SUPPORTED | AUTORECONNECT_SUPPORTED
+	generalCapa.RefreshRectSupport = 0
+	generalCapa.SuppressOutputSupport = 0
+
+	bitmapCapa := c.clientCapabilities[CAPSTYPE_BITMAP].(*BitmapCapability)
+	bitmapCapa.PreferredBitsPerPixel = c.clientCoreData.HighColorDepth
+	bitmapCapa.DesktopWidth = c.clientCoreData.DesktopWidth
+	bitmapCapa.DesktopHeight = c.clientCoreData.DesktopHeight
+	bitmapCapa.DesktopResizeFlag = 0x0001
+
+	orderCapa := c.clientCapabilities[CAPSTYPE_ORDER].(*OrderCapability)
+	orderCapa.OrderFlags = NEGOTIATEORDERSUPPORT | ZEROBOUNDSDELTASSUPPORT | COLORINDEXSUPPORT | ORDERFLAGS_EXTRA_FLAGS
+	orderCapa.OrderSupportExFlags |= ORDERFLAGS_EX_ALTSEC_FRAME_MARKER_SUPPORT
+	orderCapa.OrderSupport[TS_NEG_DSTBLT_INDEX] = 1
+	orderCapa.OrderSupport[TS_NEG_PATBLT_INDEX] = 1
+	orderCapa.OrderSupport[TS_NEG_SCRBLT_INDEX] = 1
+	//orderCapa.OrderSupport[TS_NEG_LINETO_INDEX] = 1
+	//orderCapa.OrderSupport[TS_NEG_MEMBLT_INDEX] = 1
+	//orderCapa.OrderSupport[TS_NEG_MEM3BLT_INDEX] = 1
+	//orderCapa.OrderSupport[TS_NEG_POLYLINE_INDEX] = 1
+	/*orderCapa.OrderSupport[TS_NEG_MULTIOPAQUERECT_INDEX] = 1
+	orderCapa.OrderSupport[TS_NEG_GLYPH_INDEX_INDEX] = 1
+	//orderCapa.OrderSupport[TS_NEG_DRAWNINEGRID_INDEX] = 1
+	orderCapa.OrderSupport[TS_NEG_SAVEBITMAP_INDEX] = 1
+	orderCapa.OrderSupport[TS_NEG_POLYGON_SC_INDEX] = 1
+	orderCapa.OrderSupport[TS_NEG_POLYGON_CB_INDEX] = 1
+	orderCapa.OrderSupport[TS_NEG_ELLIPSE_SC_INDEX] = 1
+	orderCapa.OrderSupport[TS_NEG_ELLIPSE_CB_INDEX] = 1*/
+	orderCapa.OrderSupport[TS_NEG_FAST_GLYPH_INDEX] = 1
+
+	inputCapa := c.clientCapabilities[CAPSTYPE_INPUT].(*InputCapability)
+	inputCapa.Flags = INPUT_FLAG_SCANCODES | INPUT_FLAG_MOUSEX | INPUT_FLAG_UNICODE
+	inputCapa.KeyboardLayout = c.clientCoreData.KbdLayout
+	inputCapa.KeyboardType = c.clientCoreData.KeyboardType
+	inputCapa.KeyboardSubType = c.clientCoreData.KeyboardSubType
+	inputCapa.KeyboardFunctionKey = c.clientCoreData.KeyboardFnKeys
+	inputCapa.ImeFileName = c.clientCoreData.ImeFileName
+
+	glyphCapa := c.clientCapabilities[CAPSTYPE_GLYPHCACHE].(*GlyphCapability)
+	/*glyphCapa.GlyphCache[0] = cacheEntry{254, 4}
+	glyphCapa.GlyphCache[1] = cacheEntry{254, 4}
+	glyphCapa.GlyphCache[2] = cacheEntry{254, 8}
+	glyphCapa.GlyphCache[3] = cacheEntry{254, 8}
+	glyphCapa.GlyphCache[4] = cacheEntry{254, 16}
+	glyphCapa.GlyphCache[5] = cacheEntry{254, 32}
+	glyphCapa.GlyphCache[6] = cacheEntry{254, 64}
+	glyphCapa.GlyphCache[7] = cacheEntry{254, 128}
+	glyphCapa.GlyphCache[8] = cacheEntry{254, 256}
+	glyphCapa.GlyphCache[9] = cacheEntry{64, 2048}
+	glyphCapa.FragCache = 0x01000100*/
+	glyphCapa.SupportLevel = GLYPH_SUPPORT_NONE
+
+	pdu.SharedId = c.sharedId
+	for _, v := range c.clientCapabilities {
+		glog.Debugf("clientCapabilities<%s>: %+v", v.Type(), v)
+		pdu.CapabilitySets = append(pdu.CapabilitySets, v)
+	}
+	pdu.NumberCapabilities = uint16(len(pdu.CapabilitySets))
+	pdu.LengthSourceDescriptor = c.demandActivePDU.LengthSourceDescriptor
+	pdu.SourceDescriptor = c.demandActivePDU.SourceDescriptor
+	pdu.LengthCombinedCapabilities = c.demandActivePDU.LengthCombinedCapabilities
+
+	c.sendPDU(pdu)
+}
+
+func (c *Client) sendClientFinalizeSynchronizePDU() {
+	glog.Debug("PDU start sendClientFinalizeSynchronizePDU")
+	c.sendDataPDU(NewSynchronizeDataPDU(c.channelId))
+	c.sendDataPDU(&ControlDataPDU{Action: CTRLACTION_COOPERATE})
+	c.sendDataPDU(&ControlDataPDU{Action: CTRLACTION_REQUEST_CONTROL})
+	//c.sendDataPDU(&PersistKeyPDU{BBitMask: 0x03})
+	c.sendDataPDU(&FontListDataPDU{ListFlags: 0x0003, EntrySize: 0x0032})
+}
+
+func (c *Client) recvServerSynchronizePDU(s []byte) {
+	glog.Debug("PDU recvServerSynchronizePDU")
+	r := bytes.NewReader(s)
+	pdu, err := readPDU(r)
+	if err != nil {
+		glog.Error(err)
+		return
+	}
+	dataPdu, ok := pdu.Message.(*DataPDU)
+	if !ok || dataPdu.Header.PDUType2 != PDUTYPE2_SYNCHRONIZE {
+		if ok {
+			glog.Error("recvServerSynchronizePDU ignore datapdu type2", dataPdu.Header.PDUType2)
+		} else {
+			glog.Error("recvServerSynchronizePDU ignore message type", pdu.ShareCtrlHeader.PDUType)
+		}
+		glog.Infof("%+v", dataPdu)
+		c.transport.Once("data", c.recvServerSynchronizePDU)
+		return
+	}
+	c.transport.Once("data", c.recvServerControlCooperatePDU)
+}
+
+func (c *Client) recvServerControlCooperatePDU(s []byte) {
+	glog.Debug("PDU recvServerControlCooperatePDU")
+	r := bytes.NewReader(s)
+	pdu, err := readPDU(r)
+	if err != nil {
+		glog.Error(err)
+		return
+	}
+
+	dataPdu, ok := pdu.Message.(*DataPDU)
+
+	if !ok || dataPdu.Header.PDUType2 != PDUTYPE2_CONTROL {
+		if ok {
+			glog.Error("recvServerControlCooperatePDU ignore datapdu type2", dataPdu.Header.PDUType2)
+		} else {
+			glog.Error("recvServerControlCooperatePDU ignore message type", pdu.ShareCtrlHeader.PDUType)
+		}
+		c.transport.Once("data", c.recvServerControlCooperatePDU)
+		return
+	}
+	glog.Debugf("-------------PDUType2 = %02x\n", dataPdu.Header.PDUType2)
+	if dataPdu.Header.PDUType2 == PDUTYPE2_SAVE_SESSION_INFO {
+		c.Emit("success")
+	}
+
+	if dataPdu.Data.(*ControlDataPDU).Action != CTRLACTION_COOPERATE {
+		glog.Error("recvServerControlCooperatePDU ignore action", dataPdu.Data.(*ControlDataPDU).Action)
+		c.transport.Once("data", c.recvServerControlCooperatePDU)
+		return
+	}
+	c.transport.Once("data", c.recvServerControlGrantedPDU)
+}
+
+func (c *Client) recvServerControlGrantedPDU(s []byte) {
+	glog.Debug("PDU recvServerControlGrantedPDU")
+	r := bytes.NewReader(s)
+	pdu, err := readPDU(r)
+	if err != nil {
+		glog.Error(err)
+		return
+	}
+	dataPdu, ok := pdu.Message.(*DataPDU)
+	if !ok || dataPdu.Header.PDUType2 != PDUTYPE2_CONTROL {
+		if ok {
+			glog.Error("recvServerControlGrantedPDU ignore datapdu type2", dataPdu.Header.PDUType2)
+		} else {
+			glog.Error("recvServerControlGrantedPDU ignore message type", pdu.ShareCtrlHeader.PDUType)
+		}
+		c.transport.Once("data", c.recvServerControlGrantedPDU)
+		return
+	}
+	if dataPdu.Data.(*ControlDataPDU).Action != CTRLACTION_GRANTED_CONTROL {
+		glog.Error("recvServerControlGrantedPDU ignore action", dataPdu.Data.(*ControlDataPDU).Action)
+		c.transport.Once("data", c.recvServerControlGrantedPDU)
+		return
+	}
+	c.transport.Once("data", c.recvServerFontMapPDU)
+}
+
+func (c *Client) recvServerFontMapPDU(s []byte) {
+	glog.Debug("PDU recvServerFontMapPDU")
+	r := bytes.NewReader(s)
+	pdu, err := readPDU(r)
+	if err != nil {
+		glog.Error(err)
+		return
+	}
+	dataPdu, ok := pdu.Message.(*DataPDU)
+	if !ok || dataPdu.Header.PDUType2 != PDUTYPE2_FONTMAP {
+		if ok {
+			glog.Error("recvServerFontMapPDU ignore datapdu type2", dataPdu.Header.PDUType2)
+		} else {
+			glog.Error("recvServerFontMapPDU ignore message type", pdu.ShareCtrlHeader.PDUType)
+		}
+		return
+	}
+	c.transport.On("data", c.recvPDU)
+	c.Emit("ready")
+}
+
+func (c *Client) recvPDU(s []byte) {
+	glog.Trace("PDU recvPDU", hex.EncodeToString(s))
+	r := bytes.NewReader(s)
+	if r.Len() > 0 {
+		p, err := readPDU(r)
+		if err != nil {
+			glog.Error(err)
+			return
+		}
+		if p.ShareCtrlHeader.PDUType == PDUTYPE_DEACTIVATEALLPDU {
+			c.transport.Once("data", c.recvDemandActivePDU)
+		} else if p.ShareCtrlHeader.PDUType == PDUTYPE_DATAPDU {
+			d := p.Message.(*DataPDU)
+			if d.Header.PDUType2 == PDUTYPE2_UPDATE {
+				up := d.Data.(*UpdateDataPDU)
+				p := up.Udata
+				if up.UpdateType == FASTPATH_UPDATETYPE_BITMAP {
+					c.Emit("bitmap", p.(*BitmapUpdateDataPDU).Rectangles)
+				}
+			}
+			if d.Header.PDUType2 == PDUTYPE2_SAVE_SESSION_INFO {
+				c.Emit("success")
+			}
+		}
+	}
+}
+
+func (c *Client) RecvFastPath(secFlag byte, s []byte) {
+	glog.Trace("PDU RecvFastPath", hex.EncodeToString(s))
+	r := bytes.NewReader(s)
+	for r.Len() > 0 {
+		updateHeader, err := core.ReadUInt8(r)
+		if err != nil {
+			return
+		}
+		updateCode := updateHeader & 0x0f
+		fragmentation := updateHeader & 0x30
+		compression := updateHeader & 0xC0
+
+		var compressionFlags uint8 = 0
+		if compression == FASTPATH_OUTPUT_COMPRESSION_USED {
+			compressionFlags, err = core.ReadUInt8(r)
+		}
+
+		size, err := core.ReadUint16LE(r)
+
+		if err != nil {
+			return
+		}
+		glog.Trace("Code:", FastPathUpdateType(updateCode),
+			"compressionFlags:", compressionFlags,
+			"fragmentation:", fragmentation,
+			"size:", size, "len:", r.Len())
+		if compressionFlags&RDP_MPPC_COMPRESSED != 0 {
+			glog.Info("RDP_MPPC_COMPRESSED")
+		}
+		if fragmentation != FASTPATH_FRAGMENT_SINGLE {
+			if fragmentation == FASTPATH_FRAGMENT_FIRST {
+				c.buff.Reset()
+			}
+			b, _ := core.ReadBytes(r.Len(), r)
+			c.buff.Write(b)
+			if fragmentation != FASTPATH_FRAGMENT_LAST {
+				return
+			}
+			r = bytes.NewReader(c.buff.Bytes())
+		}
+
+		p, err := readFastPathUpdatePDU(r, updateCode)
+		if err != nil || p == nil || p.Data == nil {
+			glog.Debug("readFastPathUpdatePDU:", err)
+			return
+		}
+
+		if updateCode == FASTPATH_UPDATETYPE_BITMAP {
+			c.Emit("bitmap", p.Data.(*FastPathBitmapUpdateDataPDU).Rectangles)
+		} else if updateCode == FASTPATH_UPDATETYPE_COLOR {
+			c.Emit("color", p.Data.(*FastPathColorPdu))
+		}
+	}
+}
+
+type InputEventsInterface interface {
+	Serialize() []byte
+}
+
+func (c *Client) SendInputEvents(msgType uint16, events []InputEventsInterface) {
+	p := &ClientInputEventPDU{}
+	p.NumEvents = uint16(len(events))
+	p.SlowPathInputEvents = make([]SlowPathInputEvent, 0, p.NumEvents)
+	for _, in := range events {
+		seria := in.Serialize()
+		s := SlowPathInputEvent{0, msgType, len(seria), seria}
+		p.SlowPathInputEvents = append(p.SlowPathInputEvents, s)
+	}
+
+	c.sendDataPDU(p)
+}
@@ -0,0 +1,927 @@
+package sec
+
+import (
+	"bytes"
+	"crypto/md5"
+	"crypto/rand"
+	"crypto/rc4"
+	"crypto/rsa"
+	"crypto/sha1"
+	"encoding/hex"
+	"errors"
+	"fmt"
+	"io"
+	"unicode/utf16"
+
+	"github.com/lunixbochs/struc"
+
+	"github.com/shadow1ng/fscan/libs/grdp/protocol/nla"
+
+	"github.com/shadow1ng/fscan/libs/grdp/core"
+	"github.com/shadow1ng/fscan/libs/grdp/emission"
+	"github.com/shadow1ng/fscan/libs/grdp/glog"
+	"github.com/shadow1ng/fscan/libs/grdp/protocol/lic"
+	"github.com/shadow1ng/fscan/libs/grdp/protocol/t125"
+	"github.com/shadow1ng/fscan/libs/grdp/protocol/t125/gcc"
+)
+
+/**
+ * SecurityFlag
+ * @see http://msdn.microsoft.com/en-us/library/cc240579.aspx
+ */
+const (
+	EXCHANGE_PKT       uint16 = 0x0001
+	TRANSPORT_REQ             = 0x0002
+	TRANSPORT_RSP             = 0x0004
+	ENCRYPT                   = 0x0008
+	RESET_SEQNO               = 0x0010
+	IGNORE_SEQNO              = 0x0020
+	INFO_PKT                  = 0x0040
+	LICENSE_PKT               = 0x0080
+	LICENSE_ENCRYPT_CS        = 0x0200
+	LICENSE_ENCRYPT_SC        = 0x0200
+	REDIRECTION_PKT           = 0x0400
+	SECURE_CHECKSUM           = 0x0800
+	AUTODETECT_REQ            = 0x1000
+	AUTODETECT_RSP            = 0x2000
+	HEARTBEAT                 = 0x4000
+	FLAGSHI_VALID             = 0x8000
+)
+
+const (
+	INFO_MOUSE                  uint32 = 0x00000001
+	INFO_DISABLECTRLALTDEL             = 0x00000002
+	INFO_AUTOLOGON                     = 0x00000008
+	INFO_UNICODE                       = 0x00000010
+	INFO_MAXIMIZESHELL                 = 0x00000020
+	INFO_LOGONNOTIFY                   = 0x00000040
+	INFO_COMPRESSION                   = 0x00000080
+	INFO_ENABLEWINDOWSKEY              = 0x00000100
+	INFO_REMOTECONSOLEAUDIO            = 0x00002000
+	INFO_FORCE_ENCRYPTED_CS_PDU        = 0x00004000
+	INFO_RAIL                          = 0x00008000
+	INFO_LOGONERRORS                   = 0x00010000
+	INFO_MOUSE_HAS_WHEEL               = 0x00020000
+	INFO_PASSWORD_IS_SC_PIN            = 0x00040000
+	INFO_NOAUDIOPLAYBACK               = 0x00080000
+	INFO_USING_SAVED_CREDS             = 0x00100000
+	INFO_AUDIOCAPTURE                  = 0x00200000
+	INFO_VIDEO_DISABLE                 = 0x00400000
+	INFO_CompressionTypeMask           = 0x00001E00
+)
+
+const (
+	AF_INET  uint16 = 0x00002
+	AF_INET6        = 0x0017
+)
+
+const (
+	PERF_DISABLE_WALLPAPER          uint32 = 0x00000001
+	PERF_DISABLE_FULLWINDOWDRAG            = 0x00000002
+	PERF_DISABLE_MENUANIMATIONS            = 0x00000004
+	PERF_DISABLE_THEMING                   = 0x00000008
+	PERF_DISABLE_CURSOR_SHADOW             = 0x00000020
+	PERF_DISABLE_CURSORSETTINGS            = 0x00000040
+	PERF_ENABLE_FONT_SMOOTHING             = 0x00000080
+	PERF_ENABLE_DESKTOP_COMPOSITION        = 0x00000100
+)
+
+const (
+	FASTPATH_OUTPUT_SECURE_CHECKSUM = 0x1
+	FASTPATH_OUTPUT_ENCRYPTED       = 0x2
+)
+
+type ClientAutoReconnect struct {
+	CbAutoReconnectLen uint16
+	CbLen              uint32
+	Version            uint32
+	LogonId            uint32
+	SecVerifier        []byte
+}
+
+func NewClientAutoReconnect(id uint32, random []byte) *ClientAutoReconnect {
+	return &ClientAutoReconnect{
+		CbAutoReconnectLen: 28,
+		CbLen:              28,
+		Version:            1,
+		LogonId:            id,
+		SecVerifier:        nla.HMAC_MD5(random, random),
+	}
+}
+
+type RDPExtendedInfo struct {
+	ClientAddressFamily uint16 `struc:"little"`
+	CbClientAddress     uint16 `struc:"little,sizeof=ClientAddress"`
+	ClientAddress       []byte `struc:"[]byte"`
+	CbClientDir         uint16 `struc:"little,sizeof=ClientDir"`
+	ClientDir           []byte `struc:"[]byte"`
+	ClientTimeZone      []byte `struc:"[172]byte"`
+	ClientSessionId     uint32 `struc:"litttle"`
+	PerformanceFlags    uint32 `struc:"little"`
+	AutoReconnect       *ClientAutoReconnect
+}
+
+func NewExtendedInfo(auto *ClientAutoReconnect) *RDPExtendedInfo {
+	return &RDPExtendedInfo{
+		ClientAddressFamily: AF_INET,
+		ClientAddress:       []byte{0, 0},
+		ClientDir:           []byte{0, 0},
+		ClientTimeZone:      make([]byte, 172),
+		ClientSessionId:     0,
+		AutoReconnect:       auto,
+	}
+}
+
+func (o *RDPExtendedInfo) Serialize() []byte {
+	buff := &bytes.Buffer{}
+	core.WriteUInt16LE(o.ClientAddressFamily, buff)
+	core.WriteUInt16LE(uint16(len(o.ClientAddress)), buff)
+	core.WriteBytes(o.ClientAddress, buff)
+	core.WriteUInt16LE(uint16(len(o.ClientDir)), buff)
+	core.WriteBytes(o.ClientDir, buff)
+	core.WriteBytes(o.ClientTimeZone, buff)
+	core.WriteUInt32LE(o.ClientSessionId, buff)
+	core.WriteUInt32LE(o.PerformanceFlags, buff)
+
+	if o.AutoReconnect != nil {
+		core.WriteUInt16LE(o.AutoReconnect.CbAutoReconnectLen, buff)
+		core.WriteUInt32LE(o.AutoReconnect.CbLen, buff)
+		core.WriteUInt32LE(o.AutoReconnect.Version, buff)
+		core.WriteUInt32LE(o.AutoReconnect.LogonId, buff)
+		core.WriteBytes(o.AutoReconnect.SecVerifier, buff)
+	}
+
+	return buff.Bytes()
+}
+
+type RDPInfo struct {
+	CodePage         uint32
+	Flag             uint32
+	CbDomain         uint16
+	CbUserName       uint16
+	CbPassword       uint16
+	CbAlternateShell uint16
+	CbWorkingDir     uint16
+	Domain           []byte
+	UserName         []byte
+	Password         []byte
+	AlternateShell   []byte
+	WorkingDir       []byte
+	ExtendedInfo     *RDPExtendedInfo
+}
+
+func NewRDPInfo() *RDPInfo {
+	info := &RDPInfo{
+		Flag: INFO_MOUSE | INFO_UNICODE | INFO_MAXIMIZESHELL |
+			INFO_ENABLEWINDOWSKEY | INFO_DISABLECTRLALTDEL | INFO_MOUSE_HAS_WHEEL |
+			INFO_FORCE_ENCRYPTED_CS_PDU | INFO_AUTOLOGON,
+		Domain:         []byte{0, 0},
+		UserName:       []byte{0, 0},
+		Password:       []byte{0, 0},
+		AlternateShell: []byte{0, 0},
+		WorkingDir:     []byte{0, 0},
+		ExtendedInfo:   NewExtendedInfo(nil),
+	}
+	return info
+}
+
+func (o *RDPInfo) SetClientAutoReconnect(auto *ClientAutoReconnect) {
+	o.ExtendedInfo.AutoReconnect = auto
+}
+
+func (o *RDPInfo) SetClientInfo() {
+	o.Flag |= INFO_LOGONNOTIFY | INFO_LOGONERRORS
+}
+
+func (o *RDPInfo) Serialize(hasExtended bool) []byte {
+	buff := &bytes.Buffer{}
+	core.WriteUInt32LE(o.CodePage, buff)                      // 0000000
+	core.WriteUInt32LE(o.Flag, buff)                          // 0530101
+	core.WriteUInt16LE(uint16(len(o.Domain)-2), buff)         // 001c
+	core.WriteUInt16LE(uint16(len(o.UserName)-2), buff)       // 0008
+	core.WriteUInt16LE(uint16(len(o.Password)-2), buff)       //000c
+	core.WriteUInt16LE(uint16(len(o.AlternateShell)-2), buff) //0000
+	core.WriteUInt16LE(uint16(len(o.WorkingDir)-2), buff)     //0000
+	core.WriteBytes(o.Domain, buff)
+	core.WriteBytes(o.UserName, buff)
+	core.WriteBytes(o.Password, buff)
+	core.WriteBytes(o.AlternateShell, buff)
+	core.WriteBytes(o.WorkingDir, buff)
+	if hasExtended {
+		core.WriteBytes(o.ExtendedInfo.Serialize(), buff)
+	}
+	return buff.Bytes()
+}
+
+type SecurityHeader struct {
+	securityFlag   uint16
+	securityFlagHi uint16
+}
+
+func readSecurityHeader(r io.Reader) *SecurityHeader {
+	s := &SecurityHeader{}
+	s.securityFlag, _ = core.ReadUint16LE(r)
+	s.securityFlagHi, _ = core.ReadUint16LE(r)
+	return s
+}
+
+type SEC struct {
+	emission.Emitter
+	transport   core.Transport
+	info        *RDPInfo
+	machineName string
+	clientData  []interface{}
+	serverData  []interface{}
+
+	enableEncryption bool
+	//Enable Secure Mac generation
+	enableSecureCheckSum bool
+	//counter before update
+	nbEncryptedPacket int
+	nbDecryptedPacket int
+
+	currentDecrytKey  []byte
+	currentEncryptKey []byte
+
+	//current rc4 tab
+	decryptRc4 *rc4.Cipher
+	encryptRc4 *rc4.Cipher
+
+	macKey  []byte
+	macSalt []byte
+}
+
+func NewSEC(t core.Transport) *SEC {
+	sec := &SEC{
+		*emission.NewEmitter(),
+		t,
+		NewRDPInfo(),
+		"",
+		nil,
+		nil,
+		false,
+		false,
+		0,
+		0,
+		nil,
+		nil,
+		nil,
+		nil,
+		nil,
+		nil,
+	}
+
+	t.On("close", func() {
+		sec.Emit("close")
+	}).On("error", func(err error) {
+		sec.Emit("error", err)
+	})
+	return sec
+}
+
+func (s *SEC) Read(data []byte) (n int, err error) {
+	return s.transport.Read(data)
+}
+
+func (s *SEC) Write(b []byte) (n int, err error) {
+	if !s.enableEncryption {
+		return s.transport.Write(b)
+	}
+	data := s.encrytData(b)
+	return s.transport.Write(data)
+}
+
+func (s *SEC) Close() error {
+	return s.transport.Close()
+}
+
+func (s *SEC) sendFlagged(flag uint16, data []byte) (n int, err error) {
+	glog.Trace("sendFlagged:", hex.EncodeToString(data))
+	b := s.encryt(flag, data)
+	return s.transport.Write(b)
+}
+
+/*
+@see: http://msdn.microsoft.com/en-us/library/cc241995.aspx
+@param macSaltKey: {str} mac key
+@param data: {str} data to sign
+@return: {str} signature
+*/
+func macData(macSaltKey, data []byte) []byte {
+	sha1Digest := sha1.New()
+	md5Digest := md5.New()
+
+	b := &bytes.Buffer{}
+	core.WriteUInt32LE(uint32(len(data)), b)
+
+	sha1Digest.Write(macSaltKey)
+	for i := 0; i < 40; i++ {
+		sha1Digest.Write([]byte("\x36"))
+	}
+
+	sha1Digest.Write(b.Bytes())
+	sha1Digest.Write(data)
+
+	sha1Sig := sha1Digest.Sum(nil)
+
+	md5Digest.Write(macSaltKey)
+	for i := 0; i < 48; i++ {
+		md5Digest.Write([]byte("\x5c"))
+	}
+
+	md5Digest.Write(sha1Sig)
+
+	return md5Digest.Sum(nil)
+}
+func (s *SEC) readEncryptedPayload(data []byte, checkSum bool) []byte {
+	r := bytes.NewReader(data)
+	sign, _ := core.ReadBytes(8, r)
+	glog.Debug("read sign:", sign)
+	encryptedPayload, _ := core.ReadBytes(r.Len(), r)
+	if s.decryptRc4 == nil {
+		s.decryptRc4, _ = rc4.NewCipher(s.currentDecrytKey)
+	}
+	s.nbDecryptedPacket++
+	glog.Debug("nbDecryptedPacket:", s.nbDecryptedPacket)
+	plaintext := make([]byte, len(encryptedPayload))
+	s.decryptRc4.XORKeyStream(plaintext, encryptedPayload)
+
+	return plaintext
+
+}
+func (s *SEC) writeEncryptedPayload(data []byte, checkSum bool) []byte {
+	if s.nbEncryptedPacket == 4096 {
+
+	}
+
+	if checkSum {
+		glog.Debug("need checkSum")
+		return []byte{}
+	}
+
+	s.nbEncryptedPacket++
+	glog.Debug("nbEncryptedPacket:", s.nbEncryptedPacket)
+	b := &bytes.Buffer{}
+
+	sign := macData(s.macKey, data)[:8]
+	//sign := macData(s.macSalt, data)[:8]
+	if s.encryptRc4 == nil {
+		s.encryptRc4, _ = rc4.NewCipher(s.currentEncryptKey)
+	}
+
+	plaintext := make([]byte, len(data))
+	s.encryptRc4.XORKeyStream(plaintext, data)
+	b.Write(sign)
+	b.Write(plaintext)
+	glog.Debug("sign:", hex.EncodeToString(sign), "plaintext:", hex.EncodeToString(plaintext))
+	return b.Bytes()
+}
+
+func (s *SEC) encryt(flag uint16, b []byte) []byte {
+	data := b
+	if flag&ENCRYPT != 0 {
+		data = s.writeEncryptedPayload(b, flag&SECURE_CHECKSUM != 0)
+	}
+	buff := &bytes.Buffer{}
+	core.WriteUInt16LE(flag, buff)
+	core.WriteUInt16LE(0, buff)
+	core.WriteBytes(data, buff)
+
+	return buff.Bytes()
+}
+func (s *SEC) encrytData(b []byte) []byte {
+	if !s.enableEncryption {
+		return b
+	}
+
+	var flag uint16 = ENCRYPT
+	if s.enableSecureCheckSum {
+		flag |= SECURE_CHECKSUM
+	}
+	return s.encryt(flag, b)
+}
+
+func (s *SEC) decrytData(b []byte) []byte {
+	if !s.enableEncryption {
+		return b
+	}
+
+	r := bytes.NewReader(b)
+	securityFlag, _ := core.ReadUint16LE(r)
+	_, _ = core.ReadUint16LE(r) //securityFlagHi
+	data, _ := core.ReadBytes(r.Len(), r)
+	if securityFlag&ENCRYPT != 0 {
+		data = s.readEncryptedPayload(data, securityFlag&SECURE_CHECKSUM != 0)
+	}
+	return data
+}
+
+type Client struct {
+	*SEC
+	userId    uint16
+	channelId uint16
+	//initialise decrypt and encrypt keys
+	initialDecrytKey  []byte
+	initialEncryptKey []byte
+
+	fastPathListener core.FastPathListener
+	channelSender    core.ChannelSender
+}
+
+func NewClient(t core.Transport) *Client {
+	c := &Client{
+		SEC: NewSEC(t),
+	}
+	t.On("connect", c.connect)
+	return c
+}
+
+func (c *Client) SetClientAutoReconnect(id uint32, random []byte) {
+	auto := NewClientAutoReconnect(id, random)
+	c.info.SetClientAutoReconnect(auto)
+}
+
+func (c *Client) SetAlternateShell(shell string) {
+	buff := &bytes.Buffer{}
+	for _, ch := range utf16.Encode([]rune(shell)) {
+		core.WriteUInt16LE(ch, buff)
+	}
+	core.WriteUInt16LE(0, buff)
+	c.info.AlternateShell = buff.Bytes()
+	c.info.Flag |= INFO_RAIL
+}
+
+func (c *Client) SetUser(user string) {
+	buff := &bytes.Buffer{}
+	for _, ch := range utf16.Encode([]rune(user)) {
+		core.WriteUInt16LE(ch, buff)
+	}
+	core.WriteUInt16LE(0, buff)
+	c.info.UserName = buff.Bytes()
+}
+
+func (c *Client) SetPwd(pwd string) {
+	buff := &bytes.Buffer{}
+	for _, ch := range utf16.Encode([]rune(pwd)) {
+		core.WriteUInt16LE(ch, buff)
+	}
+	core.WriteUInt16LE(0, buff)
+	c.info.Password = buff.Bytes()
+}
+
+func (c *Client) SetDomain(domain string) {
+	buff := &bytes.Buffer{}
+	for _, ch := range utf16.Encode([]rune(domain)) {
+		core.WriteUInt16LE(ch, buff)
+	}
+	core.WriteUInt16LE(0, buff)
+	c.info.Domain = buff.Bytes()
+}
+
+func (c *Client) connect(clientData []interface{}, serverData []interface{}, userId uint16, channels []t125.MCSChannelInfo) {
+	glog.Debug("sec on connect:", clientData)
+	glog.Debug("sec on connect:", serverData)
+	glog.Debug("sec on connect:", userId)
+	glog.Debug("sec on connect:", channels)
+	c.clientData = clientData
+	c.serverData = serverData
+	c.userId = userId
+	for _, channel := range channels {
+		glog.Infof("channel: %s <%d>:", channel.Name, channel.ID)
+		if channel.Name == t125.GLOBAL_CHANNEL_NAME {
+			c.channelId = channel.ID
+			//break
+		}
+	}
+	c.enableEncryption = c.ClientCoreData().ServerSelectedProtocol == 0
+
+	if c.enableEncryption {
+		if !c.sendClientRandom() {
+			return
+		}
+	}
+
+	c.sendInfoPkt()
+	c.transport.Once("sec", c.recvLicenceInfo)
+}
+
+func (c *Client) ClientCoreData() *gcc.ClientCoreData {
+	return c.clientData[0].(*gcc.ClientCoreData)
+}
+func (c *Client) ClientSecurityData() *gcc.ClientSecurityData {
+	return c.clientData[1].(*gcc.ClientSecurityData)
+}
+func (c *Client) ClientNetworkData() *gcc.ClientNetworkData {
+	return c.clientData[2].(*gcc.ClientNetworkData)
+}
+
+func (c *Client) ServerSecurityData() *gcc.ServerSecurityData {
+	return c.serverData[1].(*gcc.ServerSecurityData)
+}
+
+/*
+@summary: generate 40 bits data from 128 bits data
+@param data: {str} 128 bits data
+@return: {str} 40 bits data
+@see: http://msdn.microsoft.com/en-us/library/cc240785.aspx
+*/
+func gen40bits(data []byte) []byte {
+	return append([]byte("\xd1\x26\x9e"), data[3:8]...)
+}
+
+/*
+@summary: generate 56 bits data from 128 bits data
+@param data: {str} 128 bits data
+@return: {str} 56 bits data
+@see: http://msdn.microsoft.com/en-us/library/cc240785.aspx
+*/
+func gen56bits(data []byte) []byte {
+	return append([]byte("\xd1"), data[1:8]...)
+}
+
+/*
+@summary: Generate particular signature from combination of sha1 and md5
+@see: http://msdn.microsoft.com/en-us/library/cc241992.aspx
+@param inputData: strange input (see doc)
+@param salt: salt for context call
+@param salt1: another salt (ex : client random)
+@param salt2: another another salt (ex: server random)
+@return : MD5(Salt + SHA1(Input + Salt + Salt1 + Salt2))
+*/
+func saltedHash(inputData, salt, salt1, salt2 []byte) []byte {
+	sha1Digest := sha1.New()
+	md5Digest := md5.New()
+
+	sha1Digest.Write(inputData)
+	sha1Digest.Write(salt[:48])
+	sha1Digest.Write(salt1)
+	sha1Digest.Write(salt2)
+	sha1Sig := sha1Digest.Sum(nil)
+
+	md5Digest.Write(salt[:48])
+	md5Digest.Write(sha1Sig)
+
+	return md5Digest.Sum(nil)[:16]
+}
+
+/*
+@summary: MD5(in0[:16] + in1[:32] + in2[:32])
+@param key: in 16
+@param random1: in 32
+@param random2: in 32
+@return MD5(in0[:16] + in1[:32] + in2[:32])
+*/
+func finalHash(key, random1, random2 []byte) []byte {
+	md5Digest := md5.New()
+	md5Digest.Write(key)
+	md5Digest.Write(random1)
+	md5Digest.Write(random2)
+	return md5Digest.Sum(nil)
+}
+
+/*
+@summary: Generate master secret
+@param secret: {str} secret
+@param clientRandom : {str} client random
+@param serverRandom : {str} server random
+@see: http://msdn.microsoft.com/en-us/library/cc241992.aspx
+*/
+func masterSecret(secret, random1, random2 []byte) []byte {
+	sh1 := saltedHash([]byte("A"), secret, random1, random2)
+	sh2 := saltedHash([]byte("BB"), secret, random1, random2)
+	sh3 := saltedHash([]byte("CCC"), secret, random1, random2)
+	ms := bytes.NewBuffer(nil)
+	ms.Write(sh1)
+	ms.Write(sh2)
+	ms.Write(sh3)
+	return ms.Bytes()
+}
+
+/*
+@summary: Generate master secret
+@param secret: secret
+@param clientRandom : client random
+@param serverRandom : server random
+*/
+func sessionKeyBlob(secret, random1, random2 []byte) []byte {
+	sh1 := saltedHash([]byte("X"), secret, random1, random2)
+	sh2 := saltedHash([]byte("YY"), secret, random1, random2)
+	sh3 := saltedHash([]byte("ZZZ"), secret, random1, random2)
+	ms := bytes.NewBuffer(nil)
+	ms.Write(sh1)
+	ms.Write(sh2)
+	ms.Write(sh3)
+	return ms.Bytes()
+
+}
+func generateKeys(clientRandom, serverRandom []byte, method uint32) ([]byte, []byte, []byte, error) {
+	if len(clientRandom) < 32 || len(serverRandom) < 32 {
+		return nil, nil, nil, fmt.Errorf("invalid RDP random length: client=%d server=%d", len(clientRandom), len(serverRandom))
+	}
+
+	b := &bytes.Buffer{}
+	b.Write(clientRandom[:24])
+	b.Write(serverRandom[:24])
+	preMasterHash := b.Bytes()
+	glog.Debug("preMasterHash:", hex.EncodeToString(preMasterHash))
+
+	masterHash := masterSecret(preMasterHash, clientRandom, serverRandom)
+	glog.Debug("masterHash:", hex.EncodeToString(masterHash))
+
+	sessionKey := sessionKeyBlob(masterHash, clientRandom, serverRandom)
+	glog.Debug("sessionKey:", hex.EncodeToString(sessionKey))
+
+	macKey128 := sessionKey[:16]
+	initialFirstKey128 := finalHash(sessionKey[16:32], clientRandom, serverRandom)
+	initialSecondKey128 := finalHash(sessionKey[32:48], clientRandom, serverRandom)
+
+	glog.Debug("macKey128:", hex.EncodeToString(macKey128))
+	glog.Debug("FirstKey128:", hex.EncodeToString(initialFirstKey128))
+	glog.Debug("SecondKey128:", hex.EncodeToString(initialSecondKey128))
+	//generate valid key
+	if method == gcc.ENCRYPTION_FLAG_40BIT {
+		return gen40bits(macKey128), gen40bits(initialFirstKey128), gen40bits(initialSecondKey128), nil
+	} else if method == gcc.ENCRYPTION_FLAG_56BIT {
+		return gen56bits(macKey128), gen56bits(initialFirstKey128), gen56bits(initialSecondKey128), nil
+	}
+	// method == gcc.ENCRYPTION_FLAG_128BIT
+	return macKey128, initialFirstKey128, initialSecondKey128, nil
+
+}
+
+type ClientSecurityExchangePDU struct {
+	Length                uint32 `struc:"little"`
+	EncryptedClientRandom []byte `struc:"little"`
+	Padding               []byte `struc:"[8]byte"`
+}
+
+func (e *ClientSecurityExchangePDU) serialize() []byte {
+	buff := &bytes.Buffer{}
+	core.WriteUInt32LE(e.Length, buff)
+	core.WriteBytes(e.EncryptedClientRandom, buff)
+	core.WriteBytes(e.Padding, buff)
+
+	return buff.Bytes()
+}
+func (c *Client) sendClientRandom() bool {
+	glog.Debug("send Client Random")
+
+	clientRandom := core.Random(32)
+	glog.Debug("clientRandom:", hex.EncodeToString(clientRandom))
+
+	serverRandom := c.ServerSecurityData().ServerRandom
+	glog.Debug("ServerRandom:", hex.EncodeToString(serverRandom))
+
+	var err error
+	c.macKey, c.initialDecrytKey, c.initialEncryptKey, err = generateKeys(clientRandom,
+		serverRandom, c.ServerSecurityData().EncryptionMethod)
+	if err != nil {
+		glog.Error("generateKeys failed:", err)
+		c.Emit("error", err)
+		return false
+	}
+
+	//initialize keys
+	c.currentDecrytKey = c.initialDecrytKey
+	c.currentEncryptKey = c.initialEncryptKey
+
+	//verify certificate
+	if !c.ServerSecurityData().ServerCertificate.CertData.Verify() {
+		glog.Warn("Cannot verify server identity")
+	}
+
+	serverPubKey, err := c.ServerSecurityData().ServerCertificate.CertData.GetPublicKey()
+	if err != nil || serverPubKey == nil {
+		glog.Error("GetPublicKey failed:", err)
+		c.Emit("error", errors.New("failed to get server public key"))
+		return false
+	}
+	ret, err := rsa.EncryptPKCS1v15(rand.Reader, serverPubKey, core.Reverse(clientRandom))
+	if err != nil {
+		glog.Error("EncryptPKCS1v15 err:", err)
+		c.Emit("error", err)
+		return false
+	}
+	message := ClientSecurityExchangePDU{}
+	message.EncryptedClientRandom = core.Reverse(ret)
+	message.Length = uint32(len(message.EncryptedClientRandom) + 8)
+	message.Padding = make([]byte, 8)
+
+	glog.Debug("message:", message)
+
+	c.sendFlagged(EXCHANGE_PKT, message.serialize())
+	return true
+}
+func (c *Client) sendInfoPkt() {
+	var secFlag uint16 = INFO_PKT
+	if c.enableEncryption {
+		secFlag |= ENCRYPT
+	}
+
+	glog.Debug("RdpVersion:", c.ClientCoreData().RdpVersion, ":", gcc.RDP_VERSION_5_PLUS)
+	c.sendFlagged(secFlag, c.info.Serialize(c.ClientCoreData().RdpVersion == gcc.RDP_VERSION_5_PLUS))
+}
+
+func (c *Client) recvLicenceInfo(channel string, s []byte) {
+	glog.Debug("sec recvLicenceInfo", hex.EncodeToString(s))
+	r := bytes.NewReader(s)
+	h := readSecurityHeader(r)
+	if (h.securityFlag & LICENSE_PKT) == 0 {
+		c.Emit("error", errors.New("NODE_RDP_PROTOCOL_PDU_SEC_BAD_LICENSE_HEADER"))
+		return
+	}
+
+	p := lic.ReadLicensePacket(r)
+	switch p.BMsgtype {
+	case lic.NEW_LICENSE:
+		glog.Info("sec NEW_LICENSE")
+		c.Emit("success")
+		goto connect
+	case lic.ERROR_ALERT:
+		message := p.LicensingMessage.(*lic.ErrorMessage)
+		glog.Info("sec ERROR_ALERT and ErrorCode:", message.DwErrorCode)
+		if message.DwErrorCode == lic.STATUS_VALID_CLIENT && message.DwStateTransaction == lic.ST_NO_TRANSITION {
+			goto connect
+		}
+		goto retry
+	case lic.LICENSE_REQUEST:
+		glog.Info("sec LICENSE_REQUEST")
+		c.sendClientNewLicenseRequest(p.LicensingMessage.([]byte))
+		goto retry
+	case lic.PLATFORM_CHALLENGE:
+		glog.Info("sec PLATFORM_CHALLENGE")
+		c.sendClientChallengeResponse(p.LicensingMessage.([]byte))
+		goto retry
+	default:
+		glog.Error("Not a valid license packet")
+		c.Emit("error", errors.New("Not a valid license packet"))
+		return
+	}
+
+connect:
+	c.transport.On("sec", c.recvData)
+	c.Emit("connect", c.clientData[0].(*gcc.ClientCoreData), c.userId, c.channelId)
+	return
+
+retry:
+	c.transport.Once("sec", c.recvLicenceInfo)
+	return
+}
+
+func (c *Client) sendClientNewLicenseRequest(data []byte) {
+	var req lic.ServerLicenseRequest
+	struc.Unpack(bytes.NewReader(data), &req)
+
+	var sc gcc.ServerCertificate
+	if c.ServerSecurityData().ServerCertificate.DwVersion != 0 {
+		sc = c.ServerSecurityData().ServerCertificate
+	} else {
+		rd := bytes.NewReader(req.ServerCertificate.BlobData)
+		err := sc.Unpack(rd)
+		if err != nil {
+			glog.Error("read serverCertificate err:", err)
+			return
+		}
+	}
+
+	serverRandom := req.ServerRandom
+	clientRandom := core.Random(32)
+	preMasterSecret := core.Random(48)
+	masSecret := masterSecret(preMasterSecret, clientRandom, serverRandom)
+	sessionKeyBlob := masterSecret(masSecret, serverRandom, clientRandom)
+	//c.macKey = sessionKeyBlob[:16]
+	c.macSalt = sessionKeyBlob[:16]
+	c.initialDecrytKey = finalHash(sessionKeyBlob[16:32], clientRandom, serverRandom)
+
+	//format message
+	message := &lic.ClientNewLicenseRequest{}
+	message.PreferredKeyExchangeAlg = 0x00000001
+	message.PlatformId = 0x04000000 | 0x00010000
+	message.ClientRandom = clientRandom
+
+	buff := &bytes.Buffer{}
+
+	serverPubKey, err := sc.CertData.GetPublicKey()
+	if err != nil {
+		glog.Error("GetPublicKey failed:", err)
+		return
+	}
+	ret, err := rsa.EncryptPKCS1v15(rand.Reader, serverPubKey, core.Reverse(preMasterSecret))
+	if err != nil {
+		glog.Error("EncryptPKCS1v15 failed:", err)
+		return
+	}
+
+	buff.Write(core.Reverse(ret))
+	buff.Write([]byte{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00})
+	message.EncryptedPreMasterSecret.BlobData = buff.Bytes()
+	message.EncryptedPreMasterSecret.WBlobLen = uint16(buff.Len())
+	message.EncryptedPreMasterSecret.WBlobType = lic.BB_RANDOM_BLOB
+
+	buff.Reset()
+	buff.Write(c.info.UserName)
+	buff.Write([]byte{0x00})
+	message.ClientUserName.BlobData = buff.Bytes()
+	message.ClientUserName.WBlobLen = uint16(buff.Len())
+	message.ClientUserName.WBlobType = lic.BB_CLIENT_USER_NAME_BLOB
+
+	buff.Reset()
+	buff.Write(c.ClientCoreData().ClientName[:])
+	buff.Write([]byte{0x00})
+	message.ClientMachineName.BlobData = buff.Bytes()
+	message.ClientMachineName.WBlobLen = uint16(buff.Len())
+	message.ClientMachineName.WBlobType = lic.BB_CLIENT_MACHINE_NAME_BLOB
+
+	buff.Reset()
+	err = struc.Pack(buff, message)
+	if err != nil {
+		glog.Error("err:", err)
+	}
+
+	c.sendFlagged(LICENSE_PKT, buff.Bytes())
+}
+
+func (c *Client) sendClientChallengeResponse(data []byte) {
+	var pc lic.ServerPlatformChallenge
+	struc.Unpack(bytes.NewReader(data), &pc)
+
+	serverEncryptedChallenge := pc.EncryptedPlatformChallenge.BlobData
+	//decrypt server challenge
+	//it should be TEST word in unicode format
+	rc, _ := rc4.NewCipher(c.initialDecrytKey)
+	serverChallenge := make([]byte, 20)
+	rc.XORKeyStream(serverChallenge, serverEncryptedChallenge)
+	//if serverChallenge != "T\x00E\x00S\x00T\x00\x00\x00":
+	//raise InvalidExpectedDataException("bad license server challenge")
+
+	//generate hwid
+	b := &bytes.Buffer{}
+	b.Write(c.ClientCoreData().ClientName[:])
+	b.Write(c.info.UserName)
+	for i := 0; i < 2; i++ {
+		b.Write([]byte{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00})
+	}
+	hwid := b.Bytes()[:20]
+
+	encryptedHWID := make([]byte, 20)
+	rc.XORKeyStream(encryptedHWID, hwid)
+
+	b.Reset()
+	b.Write(serverChallenge)
+	b.Write(hwid)
+
+	message := &lic.ClientPLatformChallengeResponse{}
+	message.EncryptedPlatformChallengeResponse.BlobData = serverEncryptedChallenge
+	message.EncryptedHWID.BlobData = encryptedHWID
+	//message.MACData = macData(c.macKey, b.Bytes())[:16]
+	message.MACData = macData(c.macSalt, b.Bytes())[:16]
+
+	b.Reset()
+	struc.Pack(b, message)
+	c.sendFlagged(LICENSE_PKT, b.Bytes())
+}
+
+func (c *Client) recvData(channel string, s []byte) {
+	glog.Trace("sec recvData", hex.EncodeToString(s))
+	glog.Debugf("channel<%s> data len: %d", channel, len(s))
+	data := c.decrytData(s)
+	if channel != t125.GLOBAL_CHANNEL_NAME {
+		c.Emit("channel", channel, data)
+		return
+	}
+	c.Emit("data", data)
+}
+func (c *Client) SetFastPathListener(f core.FastPathListener) {
+	c.fastPathListener = f
+}
+
+func (c *Client) RecvFastPath(secFlag byte, s []byte) {
+	data := s
+	if c.enableEncryption && secFlag&FASTPATH_OUTPUT_ENCRYPTED != 0 {
+		data = c.readEncryptedPayload(s, secFlag&FASTPATH_OUTPUT_SECURE_CHECKSUM != 0)
+	}
+	c.fastPathListener.RecvFastPath(secFlag, data)
+}
+
+func (c *Client) SetChannelSender(f core.ChannelSender) {
+	c.channelSender = f
+}
+
+func (c *Client) SendToChannel(channel string, b []byte) (int, error) {
+	if !c.enableEncryption {
+		glog.Debug("Sec Client write", hex.EncodeToString(b))
+		return c.channelSender.SendToChannel(channel, b)
+	}
+	var flag uint16 = ENCRYPT
+	if c.enableSecureCheckSum {
+		flag |= SECURE_CHECKSUM
+	}
+	data := c.writeEncryptedPayload(b, c.enableSecureCheckSum)
+
+	buff := &bytes.Buffer{}
+	core.WriteUInt16LE(flag, buff)
+	core.WriteUInt16LE(0, buff)
+	core.WriteBytes(data, buff)
+	glog.Debug("Sec Client write", channel, hex.EncodeToString(buff.Bytes()))
+	return c.channelSender.SendToChannel(channel, buff.Bytes())
+}
@@ -0,0 +1,38 @@
+package sec
+
+import (
+	"testing"
+
+	"github.com/shadow1ng/fscan/libs/grdp/glog"
+	"github.com/shadow1ng/fscan/libs/grdp/protocol/t125/gcc"
+)
+
+func TestGenerateKeysRejectsShortRandoms(t *testing.T) {
+	glog.SetLevel(glog.NONE)
+
+	clientRandom := make([]byte, 32)
+	serverRandom := make([]byte, 32)
+
+	if _, _, _, err := generateKeys(clientRandom, nil, gcc.ENCRYPTION_FLAG_128BIT); err == nil {
+		t.Fatal("expected error for empty server random")
+	}
+
+	if _, _, _, err := generateKeys(nil, serverRandom, gcc.ENCRYPTION_FLAG_128BIT); err == nil {
+		t.Fatal("expected error for empty client random")
+	}
+}
+
+func TestGenerateKeysAcceptsValidRandoms(t *testing.T) {
+	glog.SetLevel(glog.NONE)
+
+	clientRandom := make([]byte, 32)
+	serverRandom := make([]byte, 32)
+
+	macKey, decryptKey, encryptKey, err := generateKeys(clientRandom, serverRandom, gcc.ENCRYPTION_FLAG_128BIT)
+	if err != nil {
+		t.Fatalf("generateKeys returned error for valid randoms: %v", err)
+	}
+	if len(macKey) != 16 || len(decryptKey) != 16 || len(encryptKey) != 16 {
+		t.Fatalf("unexpected key lengths: mac=%d decrypt=%d encrypt=%d", len(macKey), len(decryptKey), len(encryptKey))
+	}
+}
@@ -0,0 +1,189 @@
+package ber
+
+import (
+	"errors"
+	"fmt"
+	"io"
+
+	"github.com/shadow1ng/fscan/libs/grdp/core"
+)
+
+const (
+	CLASS_MASK uint8 = 0xC0
+	CLASS_UNIV       = 0x00
+	CLASS_APPL       = 0x40
+	CLASS_CTXT       = 0x80
+	CLASS_PRIV       = 0xC0
+)
+
+const (
+	PC_MASK      uint8 = 0x20
+	PC_PRIMITIVE       = 0x00
+	PC_CONSTRUCT       = 0x20
+)
+
+const (
+	TAG_MASK            uint8 = 0x1F
+	TAG_BOOLEAN               = 0x01
+	TAG_INTEGER               = 0x02
+	TAG_BIT_STRING            = 0x03
+	TAG_OCTET_STRING          = 0x04
+	TAG_OBJECT_IDENFIER       = 0x06
+	TAG_ENUMERATED            = 0x0A
+	TAG_SEQUENCE              = 0x10
+	TAG_SEQUENCE_OF           = 0x10
+)
+
+func berPC(pc bool) uint8 {
+	if pc {
+		return PC_CONSTRUCT
+	}
+	return PC_PRIMITIVE
+}
+
+func ReadEnumerated(r io.Reader) (uint8, error) {
+	if !ReadUniversalTag(TAG_ENUMERATED, false, r) {
+		return 0, errors.New("invalid ber tag")
+	}
+	length, err := ReadLength(r)
+	if err != nil {
+		return 0, err
+	}
+	if length != 1 {
+		return 0, errors.New(fmt.Sprintf("enumerate size is wrong, get %v, expect 1", length))
+	}
+	return core.ReadUInt8(r)
+}
+
+func ReadUniversalTag(tag uint8, pc bool, r io.Reader) bool {
+	bb, _ := core.ReadUInt8(r)
+	return bb == (CLASS_UNIV|berPC(pc))|(TAG_MASK&tag)
+}
+
+func WriteUniversalTag(tag uint8, pc bool, w io.Writer) {
+	core.WriteUInt8((CLASS_UNIV|berPC(pc))|(TAG_MASK&tag), w)
+}
+
+func ReadLength(r io.Reader) (int, error) {
+	ret := 0
+	size, _ := core.ReadUInt8(r)
+	if size&0x80 > 0 {
+		size = size &^ 0x80
+		if size == 1 {
+			r, err := core.ReadUInt8(r)
+			if err != nil {
+				return 0, err
+			}
+			ret = int(r)
+		} else if size == 2 {
+			r, err := core.ReadUint16BE(r)
+			if err != nil {
+				return 0, err
+			}
+			ret = int(r)
+		} else {
+			return 0, errors.New("BER length may be 1 or 2")
+		}
+	} else {
+		ret = int(size)
+	}
+	return ret, nil
+}
+
+func WriteLength(size int, w io.Writer) {
+	if size > 0x7f {
+		core.WriteUInt8(0x82, w)
+		core.WriteUInt16BE(uint16(size), w)
+	} else {
+		core.WriteUInt8(uint8(size), w)
+	}
+}
+
+func ReadInteger(r io.Reader) (int, error) {
+	if !ReadUniversalTag(TAG_INTEGER, false, r) {
+		return 0, errors.New("Bad integer tag")
+	}
+	size, _ := ReadLength(r)
+	switch size {
+	case 1:
+		num, _ := core.ReadUInt8(r)
+		return int(num), nil
+	case 2:
+		num, _ := core.ReadUint16BE(r)
+		return int(num), nil
+	case 3:
+		integer1, _ := core.ReadUInt8(r)
+		integer2, _ := core.ReadUint16BE(r)
+		return int(integer2) + (int(integer1) << 16), nil
+	case 4:
+		num, _ := core.ReadUInt32BE(r)
+		return int(num), nil
+	default:
+		return 0, errors.New("wrong size")
+	}
+}
+
+func WriteInteger(n int, w io.Writer) {
+	WriteUniversalTag(TAG_INTEGER, false, w)
+	if n <= 0xff {
+		WriteLength(1, w)
+		core.WriteUInt8(uint8(n), w)
+	} else if n <= 0xffff {
+		WriteLength(2, w)
+		core.WriteUInt16BE(uint16(n), w)
+	} else {
+		WriteLength(4, w)
+		core.WriteUInt32BE(uint32(n), w)
+	}
+}
+
+func WriteOctetstring(str string, w io.Writer) {
+	WriteUniversalTag(TAG_OCTET_STRING, false, w)
+	WriteLength(len(str), w)
+	core.WriteBytes([]byte(str), w)
+}
+
+func WriteBoolean(b bool, w io.Writer) {
+	bb := uint8(0)
+	if b {
+		bb = uint8(0xff)
+	}
+	WriteUniversalTag(TAG_BOOLEAN, false, w)
+	WriteLength(1, w)
+	core.WriteUInt8(bb, w)
+}
+
+func ReadApplicationTag(tag uint8, r io.Reader) (int, error) {
+	bb, _ := core.ReadUInt8(r)
+	if tag > 30 {
+		if bb != (CLASS_APPL|PC_CONSTRUCT)|TAG_MASK {
+			return 0, errors.New("ReadApplicationTag invalid data")
+		}
+		bb, _ := core.ReadUInt8(r)
+		if bb != tag {
+			return 0, errors.New("ReadApplicationTag bad tag")
+		}
+	} else {
+		if bb != (CLASS_APPL|PC_CONSTRUCT)|(TAG_MASK&tag) {
+			return 0, errors.New("ReadApplicationTag invalid data2")
+		}
+	}
+	return ReadLength(r)
+}
+
+func WriteApplicationTag(tag uint8, size int, w io.Writer) {
+	if tag > 30 {
+		core.WriteUInt8((CLASS_APPL|PC_CONSTRUCT)|TAG_MASK, w)
+		core.WriteUInt8(tag, w)
+		WriteLength(size, w)
+	} else {
+		core.WriteUInt8((CLASS_APPL|PC_CONSTRUCT)|(TAG_MASK&tag), w)
+		WriteLength(size, w)
+	}
+}
+
+func WriteEncodedDomainParams(data []byte, w io.Writer) {
+	WriteUniversalTag(TAG_SEQUENCE, true, w)
+	WriteLength(len(data), w)
+	core.WriteBytes(data, w)
+}
@@ -0,0 +1,639 @@
+package gcc
+
+import (
+	"bytes"
+	"crypto/rsa"
+	"crypto/x509"
+	"crypto/x509/pkix"
+	"encoding/asn1"
+	"errors"
+	"fmt"
+	"io"
+	"math/big"
+
+	"github.com/shadow1ng/fscan/libs/grdp/glog"
+
+	"github.com/lunixbochs/struc"
+	"github.com/shadow1ng/fscan/libs/grdp/core"
+	"github.com/shadow1ng/fscan/libs/grdp/protocol/t125/per"
+)
+
+var t124_02_98_oid = []byte{0, 0, 20, 124, 0, 1}
+var h221_cs_key = "Duca"
+var h221_sc_key = "McDn"
+
+/**
+ * @see http://msdn.microsoft.com/en-us/library/cc240509.aspx
+ */
+type Message uint16
+
+const (
+	//server -> client
+	SC_CORE     Message = 0x0C01
+	SC_SECURITY         = 0x0C02
+	SC_NET              = 0x0C03
+	//client -> server
+	CS_CORE     = 0xC001
+	CS_SECURITY = 0xC002
+	CS_NET      = 0xC003
+	CS_CLUSTER  = 0xC004
+	CS_MONITOR  = 0xC005
+)
+
+/**
+ * @see http://msdn.microsoft.com/en-us/library/cc240510.aspx
+ */
+type ColorDepth uint16
+
+const (
+	RNS_UD_COLOR_8BPP      ColorDepth = 0xCA01
+	RNS_UD_COLOR_16BPP_555            = 0xCA02
+	RNS_UD_COLOR_16BPP_565            = 0xCA03
+	RNS_UD_COLOR_24BPP                = 0xCA04
+)
+
+/**
+ * @see http://msdn.microsoft.com/en-us/library/cc240510.aspx
+ */
+type HighColor uint16
+
+const (
+	HIGH_COLOR_4BPP  HighColor = 0x0004
+	HIGH_COLOR_8BPP            = 0x0008
+	HIGH_COLOR_15BPP           = 0x000f
+	HIGH_COLOR_16BPP           = 0x0010
+	HIGH_COLOR_24BPP           = 0x0018
+)
+
+/**
+ * @see http://msdn.microsoft.com/en-us/library/cc240510.aspx
+ */
+type Support uint16
+
+const (
+	RNS_UD_24BPP_SUPPORT uint16 = 0x0001
+	RNS_UD_16BPP_SUPPORT        = 0x0002
+	RNS_UD_15BPP_SUPPORT        = 0x0004
+	RNS_UD_32BPP_SUPPORT        = 0x0008
+)
+
+/**
+ * @see http://msdn.microsoft.com/en-us/library/cc240510.aspx
+ */
+type CapabilityFlag uint16
+
+const (
+	RNS_UD_CS_SUPPORT_ERRINFO_PDU        uint16 = 0x0001
+	RNS_UD_CS_WANT_32BPP_SESSION                = 0x0002
+	RNS_UD_CS_SUPPORT_STATUSINFO_PDU            = 0x0004
+	RNS_UD_CS_STRONG_ASYMMETRIC_KEYS            = 0x0008
+	RNS_UD_CS_UNUSED                            = 0x0010
+	RNS_UD_CS_VALID_CONNECTION_TYPE             = 0x0020
+	RNS_UD_CS_SUPPORT_MONITOR_LAYOUT_PDU        = 0x0040
+	RNS_UD_CS_SUPPORT_NETCHAR_AUTODETECT        = 0x0080
+	RNS_UD_CS_SUPPORT_DYNVC_GFX_PROTOCOL        = 0x0100
+	RNS_UD_CS_SUPPORT_DYNAMIC_TIME_ZONE         = 0x0200
+	RNS_UD_CS_SUPPORT_HEARTBEAT_PDU             = 0x0400
+)
+
+/**
+ * @see http://msdn.microsoft.com/en-us/library/cc240510.aspx
+ */
+type ConnectionType uint8
+
+const (
+	CONNECTION_TYPE_MODEM          ConnectionType = 0x01
+	CONNECTION_TYPE_BROADBAND_LOW                 = 0x02
+	CONNECTION_TYPE_SATELLITEV                    = 0x03
+	CONNECTION_TYPE_BROADBAND_HIGH                = 0x04
+	CONNECTION_TYPE_WAN                           = 0x05
+	CONNECTION_TYPE_LAN                           = 0x06
+	CONNECTION_TYPE_AUTODETECT                    = 0x07
+)
+
+/**
+ * @see http://msdn.microsoft.com/en-us/library/cc240510.aspx
+ */
+type VERSION uint32
+
+const (
+	RDP_VERSION_4      VERSION = 0x00080001
+	RDP_VERSION_5_PLUS         = 0x00080004
+)
+
+type Sequence uint16
+
+const (
+	RNS_UD_SAS_DEL Sequence = 0xAA03
+)
+
+/**
+ * @see http://msdn.microsoft.com/en-us/library/cc240511.aspx
+ */
+type EncryptionMethod uint32
+
+const (
+	ENCRYPTION_FLAG_40BIT  uint32 = 0x00000001
+	ENCRYPTION_FLAG_128BIT        = 0x00000002
+	ENCRYPTION_FLAG_56BIT         = 0x00000008
+	FIPS_ENCRYPTION_FLAG          = 0x00000010
+)
+
+/**
+ * @see http://msdn.microsoft.com/en-us/library/cc240518.aspx
+ */
+type EncryptionLevel uint32
+
+const (
+	ENCRYPTION_LEVEL_NONE              EncryptionLevel = 0x00000000
+	ENCRYPTION_LEVEL_LOW                               = 0x00000001
+	ENCRYPTION_LEVEL_CLIENT_COMPATIBLE                 = 0x00000002
+	ENCRYPTION_LEVEL_HIGH                              = 0x00000003
+	ENCRYPTION_LEVEL_FIPS                              = 0x00000004
+)
+
+/**
+ * @see http://msdn.microsoft.com/en-us/library/cc240513.aspx
+ */
+type ChannelOptions uint32
+
+const (
+	CHANNEL_OPTION_INITIALIZED   ChannelOptions = 0x80000000
+	CHANNEL_OPTION_ENCRYPT_RDP                  = 0x40000000
+	CHANNEL_OPTION_ENCRYPT_SC                   = 0x20000000
+	CHANNEL_OPTION_ENCRYPT_CS                   = 0x10000000
+	CHANNEL_OPTION_PRI_HIGH                     = 0x08000000
+	CHANNEL_OPTION_PRI_MED                      = 0x04000000
+	CHANNEL_OPTION_PRI_LOW                      = 0x02000000
+	CHANNEL_OPTION_COMPRESS_RDP                 = 0x00800000
+	CHANNEL_OPTION_COMPRESS                     = 0x00400000
+	CHANNEL_OPTION_SHOW_PROTOCOL                = 0x00200000
+	REMOTE_CONTROL_PERSISTENT                   = 0x00100000
+)
+
+/**
+ * IBM_101_102_KEYS is the most common keyboard type
+ */
+type KeyboardType uint32
+
+const (
+	KT_IBM_PC_XT_83_KEY KeyboardType = 0x00000001
+	KT_OLIVETTI                      = 0x00000002
+	KT_IBM_PC_AT_84_KEY              = 0x00000003
+	KT_IBM_101_102_KEYS              = 0x00000004
+	KT_NOKIA_1050                    = 0x00000005
+	KT_NOKIA_9140                    = 0x00000006
+	KT_JAPANESE                      = 0x00000007
+)
+
+/**
+ * @see http://technet.microsoft.com/en-us/library/cc766503%28WS.10%29.aspx
+ */
+type KeyboardLayout uint32
+
+const (
+	ARABIC              KeyboardLayout = 0x00000401
+	BULGARIAN                          = 0x00000402
+	CHINESE_US_KEYBOARD                = 0x00000404
+	CZECH                              = 0x00000405
+	DANISH                             = 0x00000406
+	GERMAN                             = 0x00000407
+	GREEK                              = 0x00000408
+	US                                 = 0x00000409
+	SPANISH                            = 0x0000040a
+	FINNISH                            = 0x0000040b
+	FRENCH                             = 0x0000040c
+	HEBREW                             = 0x0000040d
+	HUNGARIAN                          = 0x0000040e
+	ICELANDIC                          = 0x0000040f
+	ITALIAN                            = 0x00000410
+	JAPANESE                           = 0x00000411
+	KOREAN                             = 0x00000412
+	DUTCH                              = 0x00000413
+	NORWEGIAN                          = 0x00000414
+)
+
+/**
+ * @see http://msdn.microsoft.com/en-us/library/cc240521.aspx
+ */
+type CertificateType uint32
+
+const (
+	CERT_CHAIN_VERSION_1 CertificateType = 0x00000001
+	CERT_CHAIN_VERSION_2                 = 0x00000002
+)
+
+type ChannelDef struct {
+	Name    string `struc:"little"`
+	Options uint32 `struc:"little"`
+}
+
+type ClientCoreData struct {
+	RdpVersion             VERSION        `struc:"uint32,little"`
+	DesktopWidth           uint16         `struc:"little"`
+	DesktopHeight          uint16         `struc:"little"`
+	ColorDepth             ColorDepth     `struc:"little"`
+	SasSequence            Sequence       `struc:"little"`
+	KbdLayout              KeyboardLayout `struc:"little"`
+	ClientBuild            uint32         `struc:"little"`
+	ClientName             [32]byte       `struc:"[32]byte"`
+	KeyboardType           uint32         `struc:"little"`
+	KeyboardSubType        uint32         `struc:"little"`
+	KeyboardFnKeys         uint32         `struc:"little"`
+	ImeFileName            [64]byte       `struc:"[64]byte"`
+	PostBeta2ColorDepth    ColorDepth     `struc:"little"`
+	ClientProductId        uint16         `struc:"little"`
+	SerialNumber           uint32         `struc:"little"`
+	HighColorDepth         HighColor      `struc:"little"`
+	SupportedColorDepths   uint16         `struc:"little"`
+	EarlyCapabilityFlags   uint16         `struc:"little"`
+	ClientDigProductId     [64]byte       `struc:"[64]byte"`
+	ConnectionType         uint8          `struc:"uint8"`
+	Pad1octet              uint8          `struc:"uint8"`
+	ServerSelectedProtocol uint32         `struc:"little"`
+}
+
+func NewClientCoreData() *ClientCoreData {
+	var ClientName [32]byte
+	return &ClientCoreData{
+		RDP_VERSION_5_PLUS, 1280, 800, RNS_UD_COLOR_8BPP,
+		RNS_UD_SAS_DEL, US, 3790, ClientName, KT_IBM_101_102_KEYS,
+		0, 12, [64]byte{}, RNS_UD_COLOR_8BPP, 1, 0, HIGH_COLOR_24BPP,
+		RNS_UD_15BPP_SUPPORT | RNS_UD_16BPP_SUPPORT | RNS_UD_24BPP_SUPPORT | RNS_UD_32BPP_SUPPORT,
+		RNS_UD_CS_SUPPORT_ERRINFO_PDU, [64]byte{}, 0, 0, 0}
+}
+
+func (data *ClientCoreData) Pack() []byte {
+	buff := &bytes.Buffer{}
+	core.WriteUInt16LE(CS_CORE, buff) // 01C0
+	core.WriteUInt16LE(0xd8, buff)    // d800
+	struc.Pack(buff, data)
+	return buff.Bytes()
+}
+
+type ClientNetworkData struct {
+	ChannelCount    uint32
+	ChannelDefArray []ChannelDef
+}
+
+func NewClientNetworkData() *ClientNetworkData {
+	n := &ClientNetworkData{ChannelDefArray: make([]ChannelDef, 0, 100)}
+
+	/*var d1 ChannelDef
+	d1.Name = plugin.RDPDR_SVC_CHANNEL_NAME
+	d1.Options = uint32(CHANNEL_OPTION_INITIALIZED | CHANNEL_OPTION_ENCRYPT_RDP |
+		CHANNEL_OPTION_COMPRESS_RDP)
+	n.ChannelDefArray = append(n.ChannelDefArray, d1)
+
+	var d2 ChannelDef
+	d2.Name = plugin.RDPSND_SVC_CHANNEL_NAME
+	d2.Options = uint32(CHANNEL_OPTION_INITIALIZED | CHANNEL_OPTION_ENCRYPT_RDP |
+		CHANNEL_OPTION_COMPRESS_RDP | CHANNEL_OPTION_SHOW_PROTOCOL)
+	n.ChannelDefArray = append(n.ChannelDefArray, d2)*/
+
+	return n
+}
+
+func (n *ClientNetworkData) AddVirtualChannel(name string, option uint32) {
+	var d ChannelDef
+	d.Name = name
+	d.Options = option
+	n.ChannelDefArray = append(n.ChannelDefArray, d)
+	n.ChannelCount++
+}
+
+func (n *ClientNetworkData) Pack() []byte {
+	buff := &bytes.Buffer{}
+	core.WriteUInt16LE(CS_NET, buff) // type
+	length := uint16(n.ChannelCount*12 + 8)
+	core.WriteUInt16LE(length, buff) // len 8
+	core.WriteUInt32LE(n.ChannelCount, buff)
+	for i := 0; i < int(n.ChannelCount); i++ {
+		v := n.ChannelDefArray[i]
+		name := make([]byte, 8)
+		copy(name, []byte(v.Name))
+		core.WriteBytes(name[:], buff)
+		core.WriteUInt32LE(v.Options, buff)
+	}
+	return buff.Bytes()
+}
+
+type ClientSecurityData struct {
+	EncryptionMethods    uint32
+	ExtEncryptionMethods uint32
+}
+
+func NewClientSecurityData() *ClientSecurityData {
+	return &ClientSecurityData{
+		ENCRYPTION_FLAG_40BIT | ENCRYPTION_FLAG_56BIT | ENCRYPTION_FLAG_128BIT,
+		00}
+}
+
+func (d *ClientSecurityData) Pack() []byte {
+	buff := &bytes.Buffer{}
+	core.WriteUInt16LE(CS_SECURITY, buff) // type
+	core.WriteUInt16LE(0x0c, buff)        // len 12
+	core.WriteUInt32LE(d.EncryptionMethods, buff)
+	core.WriteUInt32LE(d.ExtEncryptionMethods, buff)
+	return buff.Bytes()
+}
+
+type RSAPublicKey struct {
+	Magic   uint32 `struc:"little"` //0x31415352
+	Keylen  uint32 `struc:"little,sizeof=Modulus"`
+	Bitlen  uint32 `struc:"little"`
+	Datalen uint32 `struc:"little"`
+	PubExp  uint32 `struc:"little"`
+	Modulus []byte `struc:"little"`
+	Padding []byte `struc:"[8]byte"`
+}
+
+type ProprietaryServerCertificate struct {
+	DwSigAlgId        uint32       `struc:"little"` //0x00000001
+	DwKeyAlgId        uint32       `struc:"little"` //0x00000001
+	PublicKeyBlobType uint16       `struc:"little"` //0x0006
+	PublicKeyBlobLen  uint16       `struc:"little,sizeof=PublicKeyBlob"`
+	PublicKeyBlob     RSAPublicKey `struc:"little"`
+	SignatureBlobType uint16       `struc:"little"` //0x0008
+	SignatureBlobLen  uint16       `struc:"little,sizeof=SignatureBlob"`
+	SignatureBlob     []byte       `struc:"little"`
+	//PaddingLen        uint16       `struc:"little,sizeof=Padding,skip"`
+	Padding []byte `struc:"[8]byte"`
+}
+
+func (p *ProprietaryServerCertificate) GetPublicKey() (*rsa.PublicKey, error) {
+	b := new(big.Int).SetBytes(core.Reverse(p.PublicKeyBlob.Modulus))
+	e := new(big.Int).SetInt64(int64(p.PublicKeyBlob.PubExp))
+	return &rsa.PublicKey{N: b, E: int(e.Int64())}, nil
+}
+func (p *ProprietaryServerCertificate) Verify() bool {
+	return true
+}
+func (p *ProprietaryServerCertificate) Encrypt() []byte {
+	//todo
+	return nil
+}
+func (p *ProprietaryServerCertificate) Unpack(r io.Reader) error {
+	p.DwSigAlgId, _ = core.ReadUInt32LE(r)
+	p.DwKeyAlgId, _ = core.ReadUInt32LE(r)
+	p.PublicKeyBlobType, _ = core.ReadUint16LE(r)
+	p.PublicKeyBlobLen, _ = core.ReadUint16LE(r)
+	var b RSAPublicKey
+	b.Magic, _ = core.ReadUInt32LE(r)
+	b.Keylen, _ = core.ReadUInt32LE(r)
+	b.Bitlen, _ = core.ReadUInt32LE(r)
+	b.Datalen, _ = core.ReadUInt32LE(r)
+	b.PubExp, _ = core.ReadUInt32LE(r)
+	b.Modulus, _ = core.ReadBytes(int(b.Keylen)-8, r)
+	b.Padding, _ = core.ReadBytes(8, r)
+	p.PublicKeyBlob = b
+	p.SignatureBlobType, _ = core.ReadUint16LE(r)
+	p.SignatureBlobLen, _ = core.ReadUint16LE(r)
+	p.SignatureBlob, _ = core.ReadBytes(int(p.SignatureBlobLen)-8, r)
+	p.Padding, _ = core.ReadBytes(8, r)
+
+	return nil
+}
+
+type CertBlob struct {
+	CbCert uint32 `struc:"little,sizeof=AbCert"`
+	AbCert []byte `struc:"little"`
+}
+type X509CertificateChain struct {
+	NumCertBlobs  uint32     `struc:"little,sizeof=CertBlobArray"`
+	CertBlobArray []CertBlob `struc:"little"`
+	Padding       []byte     `struc:"[12]byte"`
+}
+
+func (x *X509CertificateChain) GetPublicKey() (*rsa.PublicKey, error) {
+	if len(x.CertBlobArray) == 0 {
+		return nil, errors.New("empty certificate chain")
+	}
+	data := x.CertBlobArray[len(x.CertBlobArray)-1].AbCert
+	cert, err := x509.ParseCertificate(data)
+	if err != nil {
+		return nil, fmt.Errorf("parse certificate: %w", err)
+	}
+	if cert.PublicKey == nil {
+		var pubKeyInfo struct {
+			Algorithm        pkix.AlgorithmIdentifier
+			SubjectPublicKey asn1.BitString
+		}
+		_, err = asn1.Unmarshal(cert.RawSubjectPublicKeyInfo, &pubKeyInfo)
+		if err != nil {
+			return nil, fmt.Errorf("unmarshal public key info: %w", err)
+		}
+		rsaPublicKey, err := x509.ParsePKCS1PublicKey(pubKeyInfo.SubjectPublicKey.Bytes)
+		if err != nil {
+			return nil, fmt.Errorf("parse PKCS1 public key: %w", err)
+		}
+		return rsaPublicKey, nil
+	}
+	rsaPublicKey, ok := cert.PublicKey.(*rsa.PublicKey)
+	if !ok {
+		return nil, fmt.Errorf("unsupported public key type: %T", cert.PublicKey)
+	}
+	return rsaPublicKey, nil
+}
+func (x *X509CertificateChain) Verify() bool {
+	return true
+}
+func (x *X509CertificateChain) Encrypt() []byte {
+	//todo
+	return nil
+}
+func (x *X509CertificateChain) Unpack(r io.Reader) error {
+	return struc.Unpack(r, x)
+}
+
+type ServerCoreData struct {
+	RdpVersion              VERSION `struc:"uint32,little"`
+	ClientRequestedProtocol uint32  `struc:"little"`
+	EarlyCapabilityFlags    uint32  `struc:"little"`
+}
+
+func NewServerCoreData() *ServerCoreData {
+	return &ServerCoreData{
+		RDP_VERSION_5_PLUS, 0, 0}
+}
+
+func (d *ServerCoreData) Serialize() []byte {
+	return []byte{}
+}
+
+func (d *ServerCoreData) ScType() Message {
+	return SC_CORE
+}
+func (d *ServerCoreData) Unpack(r io.Reader) error {
+	version, _ := core.ReadUInt32LE(r)
+	d.RdpVersion = VERSION(version)
+	d.ClientRequestedProtocol, _ = core.ReadUInt32LE(r)
+	d.EarlyCapabilityFlags, _ = core.ReadUInt32LE(r)
+
+	return nil
+	//return struc.Unpack(r, d)
+}
+
+type ServerNetworkData struct {
+	MCSChannelId   uint16   `struc:"little"`
+	ChannelCount   uint16   `struc:"little,sizeof=ChannelIdArray"`
+	ChannelIdArray []uint16 `struc:"little"`
+}
+
+func NewServerNetworkData() *ServerNetworkData {
+	return &ServerNetworkData{}
+}
+func (d *ServerNetworkData) ScType() Message {
+	return SC_NET
+}
+func (d *ServerNetworkData) Unpack(r io.Reader) error {
+	return struc.Unpack(r, d)
+}
+
+type CertData interface {
+	GetPublicKey() (*rsa.PublicKey, error)
+	Verify() bool
+	Unpack(io.Reader) error
+}
+type ServerCertificate struct {
+	DwVersion uint32
+	CertData  CertData
+}
+
+func (sc *ServerCertificate) Unpack(r io.Reader) error {
+	sc.DwVersion, _ = core.ReadUInt32LE(r)
+	var cd CertData
+	switch CertificateType(sc.DwVersion & 0x7fffffff) {
+	case CERT_CHAIN_VERSION_1:
+		glog.Debug("ProprietaryServerCertificate")
+		cd = &ProprietaryServerCertificate{}
+	case CERT_CHAIN_VERSION_2:
+		glog.Debug("X509CertificateChain")
+		cd = &X509CertificateChain{}
+	default:
+		glog.Error("Unsupported version:", sc.DwVersion&0x7fffffff)
+		return errors.New("Unsupported version")
+	}
+	if cd != nil {
+		err := cd.Unpack(r)
+		if err != nil {
+			glog.Error("Unpack:", err)
+			return err
+		}
+	}
+	sc.CertData = cd
+
+	return nil
+}
+
+type ServerSecurityData struct {
+	EncryptionMethod  uint32 `struc:"little"`
+	EncryptionLevel   uint32 `struc:"little"`
+	ServerRandomLen   uint32 //0x00000020
+	ServerCertLen     uint32
+	ServerRandom      []byte
+	ServerCertificate ServerCertificate
+}
+
+func NewServerSecurityData() *ServerSecurityData {
+	return &ServerSecurityData{
+		0, 0, 0x00000020, 0, []byte{}, ServerCertificate{}}
+}
+func (d *ServerSecurityData) ScType() Message {
+	return SC_SECURITY
+}
+func (s *ServerSecurityData) Unpack(r io.Reader) error {
+	s.EncryptionMethod, _ = core.ReadUInt32LE(r)
+	s.EncryptionLevel, _ = core.ReadUInt32LE(r)
+	if !(s.EncryptionMethod == 0 && s.EncryptionLevel == 0) {
+		s.ServerRandomLen, _ = core.ReadUInt32LE(r)
+		s.ServerCertLen, _ = core.ReadUInt32LE(r)
+		s.ServerRandom, _ = core.ReadBytes(int(s.ServerRandomLen), r)
+		var sc ServerCertificate
+		data, _ := core.ReadBytes(int(s.ServerCertLen), r)
+		rd := bytes.NewReader(data)
+		err := sc.Unpack(rd)
+		if err != nil {
+			return err
+		}
+		s.ServerCertificate = sc
+	}
+
+	return nil
+}
+
+func MakeConferenceCreateRequest(userData []byte) []byte {
+	buff := &bytes.Buffer{}
+	per.WriteChoice(0, buff)                        // 00
+	per.WriteObjectIdentifier(t124_02_98_oid, buff) // 05:00:14:7c:00:01
+	per.WriteLength(len(userData)+14, buff)
+	per.WriteChoice(0, buff)                   // 00
+	per.WriteSelection(0x08, buff)             // 08
+	per.WriteNumericString("1", 1, buff)       // 00 10
+	per.WritePadding(1, buff)                  // 00
+	per.WriteNumberOfSet(1, buff)              // 01
+	per.WriteChoice(0xc0, buff)                // c0
+	per.WriteOctetStream(h221_cs_key, 4, buff) // 00 44:75:63:61
+	per.WriteOctetStream(string(userData), 0, buff)
+	return buff.Bytes()
+}
+
+type ScData interface {
+	ScType() Message
+	Unpack(io.Reader) error
+}
+
+func ReadConferenceCreateResponse(data []byte) []interface{} {
+	ret := make([]interface{}, 0, 3)
+
+	r := bytes.NewReader(data)
+	per.ReadChoice(r)
+	if !per.ReadObjectIdentifier(r, t124_02_98_oid) {
+		glog.Error("NODE_RDP_PROTOCOL_T125_GCC_BAD_OBJECT_IDENTIFIER_T124")
+		return ret
+	}
+	per.ReadLength(r)
+	per.ReadChoice(r)
+	per.ReadInteger16(r)
+	per.ReadInteger(r)
+	per.ReadEnumerates(r)
+	per.ReadNumberOfSet(r)
+	per.ReadChoice(r)
+
+	if !per.ReadOctetStream(r, h221_sc_key, 4) {
+		glog.Error("NODE_RDP_PROTOCOL_T125_GCC_BAD_H221_SC_KEY")
+		return ret
+	}
+
+	ln, _ := per.ReadLength(r)
+	for ln > 0 {
+		t, _ := core.ReadUint16LE(r)
+		glog.Debugf("Message type 0x%x,ln:%v", t, ln)
+		l, _ := core.ReadUint16LE(r)
+		dataBytes, _ := core.ReadBytes(int(l)-4, r)
+		ln = ln - l
+		var d ScData
+		switch Message(t) {
+		case SC_CORE:
+			d = &ServerCoreData{}
+		case SC_SECURITY:
+			d = &ServerSecurityData{}
+		case SC_NET:
+			d = &ServerNetworkData{}
+		default:
+			glog.Error("Unknown type", t)
+			continue
+		}
+
+		if d != nil {
+			r := bytes.NewReader(dataBytes)
+			err := d.Unpack(r)
+			if err != nil {
+				glog.Warn("Unpack:", err)
+			}
+			ret = append(ret, d)
+		}
+	}
+
+	return ret
+}
@@ -0,0 +1,13 @@
+package gcc
+
+import (
+	"bytes"
+	"testing"
+)
+
+func TestClientCoreDataDoesNotExposeClientName(t *testing.T) {
+	data := NewClientCoreData()
+	if !bytes.Equal(data.ClientName[:], make([]byte, len(data.ClientName))) {
+		t.Fatalf("client name is not empty: %x", data.ClientName)
+	}
+}
@@ -0,0 +1,558 @@
+package t125
+
+import (
+	"bytes"
+	"encoding/hex"
+	"errors"
+	"fmt"
+	"io"
+	"reflect"
+
+	"github.com/shadow1ng/fscan/libs/grdp/core"
+	"github.com/shadow1ng/fscan/libs/grdp/emission"
+	"github.com/shadow1ng/fscan/libs/grdp/glog"
+	"github.com/shadow1ng/fscan/libs/grdp/protocol/t125/ber"
+	"github.com/shadow1ng/fscan/libs/grdp/protocol/t125/gcc"
+	"github.com/shadow1ng/fscan/libs/grdp/protocol/t125/per"
+)
+
+// take idea from https://github.com/Madnikulin50/gordp
+
+// Multiple Channel Service layer
+
+type MCSMessage uint8
+
+const (
+	MCS_TYPE_CONNECT_INITIAL  MCSMessage = 0x65
+	MCS_TYPE_CONNECT_RESPONSE            = 0x66
+)
+
+type MCSDomainPDU uint16
+
+const (
+	ERECT_DOMAIN_REQUEST          MCSDomainPDU = 1
+	DISCONNECT_PROVIDER_ULTIMATUM              = 8
+	ATTACH_USER_REQUEST                        = 10
+	ATTACH_USER_CONFIRM                        = 11
+	CHANNEL_JOIN_REQUEST                       = 14
+	CHANNEL_JOIN_CONFIRM                       = 15
+	SEND_DATA_REQUEST                          = 25
+	SEND_DATA_INDICATION                       = 26
+)
+
+const (
+	MCS_GLOBAL_CHANNEL_ID uint16 = 1003
+	MCS_USERCHANNEL_BASE         = 1001
+)
+
+const (
+	GLOBAL_CHANNEL_NAME = "global"
+)
+
+/**
+ * Format MCS PDULayer header packet
+ * @param mcsPdu {integer}
+ * @param options {integer}
+ * @returns {type.UInt8} headers
+ */
+func writeMCSPDUHeader(mcsPdu MCSDomainPDU, options uint8, w io.Writer) {
+	core.WriteUInt8((uint8(mcsPdu)<<2)|options, w)
+}
+
+func readMCSPDUHeader(options uint8, mcsPdu MCSDomainPDU) bool {
+	return (options >> 2) == uint8(mcsPdu)
+}
+
+type DomainParameters struct {
+	MaxChannelIds   int
+	MaxUserIds      int
+	MaxTokenIds     int
+	NumPriorities   int
+	MinThoughput    int
+	MaxHeight       int
+	MaxMCSPDUsize   int
+	ProtocolVersion int
+}
+
+/**
+ * @see http://www.itu.int/rec/T-REC-T.125-199802-I/en page 25
+ * @returns {asn1.univ.Sequence}
+ */
+func NewDomainParameters(
+	maxChannelIds int,
+	maxUserIds int,
+	maxTokenIds int,
+	numPriorities int,
+	minThoughput int,
+	maxHeight int,
+	maxMCSPDUsize int,
+	protocolVersion int) *DomainParameters {
+	return &DomainParameters{maxChannelIds, maxUserIds, maxTokenIds,
+		numPriorities, minThoughput, maxHeight, maxMCSPDUsize, protocolVersion}
+}
+
+func (d *DomainParameters) BER() []byte {
+	buff := &bytes.Buffer{}
+	ber.WriteInteger(d.MaxChannelIds, buff)
+	ber.WriteInteger(d.MaxUserIds, buff)
+	ber.WriteInteger(d.MaxTokenIds, buff)
+	ber.WriteInteger(1, buff)
+	ber.WriteInteger(0, buff)
+	ber.WriteInteger(1, buff)
+	ber.WriteInteger(d.MaxMCSPDUsize, buff)
+	ber.WriteInteger(2, buff)
+	return buff.Bytes()
+}
+
+func ReadDomainParameters(r io.Reader) (*DomainParameters, error) {
+	if !ber.ReadUniversalTag(ber.TAG_SEQUENCE, true, r) {
+		return nil, errors.New("bad BER tags")
+	}
+	d := &DomainParameters{}
+	ber.ReadLength(r)
+
+	d.MaxChannelIds, _ = ber.ReadInteger(r)
+	d.MaxUserIds, _ = ber.ReadInteger(r)
+	d.MaxTokenIds, _ = ber.ReadInteger(r)
+	ber.ReadInteger(r)
+	ber.ReadInteger(r)
+	ber.ReadInteger(r)
+	d.MaxMCSPDUsize, _ = ber.ReadInteger(r)
+	ber.ReadInteger(r)
+	return d, nil
+}
+
+/**
+ * @see http://www.itu.int/rec/T-REC-T.125-199802-I/en page 25
+ * @param userData {Buffer}
+ * @returns {asn1.univ.Sequence}
+ */
+type ConnectInitial struct {
+	CallingDomainSelector []byte
+	CalledDomainSelector  []byte
+	UpwardFlag            bool
+	TargetParameters      DomainParameters
+	MinimumParameters     DomainParameters
+	MaximumParameters     DomainParameters
+	UserData              []byte
+}
+
+func NewConnectInitial(userData []byte) ConnectInitial {
+	return ConnectInitial{[]byte{0x1},
+		[]byte{0x1},
+		true,
+		*NewDomainParameters(34, 2, 0, 1, 0, 1, 0xffff, 2),
+		*NewDomainParameters(1, 1, 1, 1, 0, 1, 0x420, 2),
+		*NewDomainParameters(0xffff, 0xfc17, 0xffff, 1, 0, 1, 0xffff, 2),
+		userData}
+}
+
+func (c *ConnectInitial) BER() []byte {
+	buff := &bytes.Buffer{}
+	ber.WriteOctetstring(string(c.CallingDomainSelector), buff)
+	ber.WriteOctetstring(string(c.CalledDomainSelector), buff)
+	ber.WriteBoolean(c.UpwardFlag, buff)
+	ber.WriteEncodedDomainParams(c.TargetParameters.BER(), buff)
+	ber.WriteEncodedDomainParams(c.MinimumParameters.BER(), buff)
+	ber.WriteEncodedDomainParams(c.MaximumParameters.BER(), buff)
+	ber.WriteOctetstring(string(c.UserData), buff)
+	return buff.Bytes()
+}
+
+/**
+ * @see http://www.itu.int/rec/T-REC-T.125-199802-I/en page 25
+ * @returns {asn1.univ.Sequence}
+ */
+
+type ConnectResponse struct {
+	result           uint8
+	calledConnectId  int
+	domainParameters *DomainParameters
+	userData         []byte
+}
+
+func NewConnectResponse(userData []byte) *ConnectResponse {
+	return &ConnectResponse{0,
+		0,
+		NewDomainParameters(22, 3, 0, 1, 0, 1, 0xfff8, 2),
+		userData}
+}
+
+func ReadConnectResponse(r io.Reader) (*ConnectResponse, error) {
+	c := &ConnectResponse{}
+	var err error
+	_, err = ber.ReadApplicationTag(MCS_TYPE_CONNECT_RESPONSE, r)
+	if err != nil {
+		return nil, err
+	}
+	c.result, err = ber.ReadEnumerated(r)
+	if err != nil {
+		return nil, err
+	}
+
+	c.calledConnectId, err = ber.ReadInteger(r)
+	c.domainParameters, err = ReadDomainParameters(r)
+	if err != nil {
+		return nil, err
+	}
+	if !ber.ReadUniversalTag(ber.TAG_OCTET_STRING, false, r) {
+		return nil, errors.New("invalid expected BER tag")
+	}
+	dataLen, _ := ber.ReadLength(r)
+	c.userData, err = core.ReadBytes(dataLen, r)
+	return c, err
+}
+
+type MCSChannelInfo struct {
+	ID   uint16
+	Name string
+}
+
+type MCS struct {
+	emission.Emitter
+	transport  core.Transport
+	recvOpCode MCSDomainPDU
+	sendOpCode MCSDomainPDU
+	channels   []MCSChannelInfo
+}
+
+func NewMCS(t core.Transport, recvOpCode MCSDomainPDU, sendOpCode MCSDomainPDU) *MCS {
+	m := &MCS{
+		*emission.NewEmitter(),
+		t,
+		recvOpCode,
+		sendOpCode,
+		[]MCSChannelInfo{{MCS_GLOBAL_CHANNEL_ID, GLOBAL_CHANNEL_NAME}},
+	}
+
+	m.transport.On("close", func() {
+		m.Emit("close")
+	}).On("error", func(err error) {
+		m.Emit("error", err)
+	})
+	return m
+}
+
+func (x *MCS) Read(b []byte) (n int, err error) {
+	return x.transport.Read(b)
+}
+
+func (x *MCS) Write(b []byte) (n int, err error) {
+	return x.transport.Write(b)
+}
+
+func (m *MCS) Close() error {
+	return m.transport.Close()
+}
+
+type MCSClient struct {
+	*MCS
+	clientCoreData     *gcc.ClientCoreData
+	clientNetworkData  *gcc.ClientNetworkData
+	clientSecurityData *gcc.ClientSecurityData
+
+	serverCoreData     *gcc.ServerCoreData
+	serverNetworkData  *gcc.ServerNetworkData
+	serverSecurityData *gcc.ServerSecurityData
+
+	channelsConnected  int
+	userId             uint16
+	nbChannelRequested int
+}
+
+func NewMCSClient(t core.Transport) *MCSClient {
+	c := &MCSClient{
+		MCS:                NewMCS(t, SEND_DATA_INDICATION, SEND_DATA_REQUEST),
+		clientCoreData:     gcc.NewClientCoreData(),
+		clientNetworkData:  gcc.NewClientNetworkData(),
+		clientSecurityData: gcc.NewClientSecurityData(),
+		userId:             1 + MCS_USERCHANNEL_BASE,
+	}
+	c.transport.On("connect", c.connect)
+	return c
+}
+
+func (c *MCSClient) SetClientCoreData(width, height uint16) {
+	c.clientCoreData.DesktopWidth = width
+	c.clientCoreData.DesktopHeight = height
+}
+
+func (c *MCSClient) connect(selectedProtocol uint32) {
+	glog.Debug("mcs client on connect", selectedProtocol)
+	c.clientCoreData.ServerSelectedProtocol = selectedProtocol
+
+	glog.Debugf("clientCoreData:%+v", c.clientCoreData)
+	glog.Debugf("clientNetworkData:%+v", c.clientNetworkData)
+	glog.Debugf("clientSecurityData:%+v", c.clientSecurityData)
+	// sendConnectclientCoreDataInitial
+	userDataBuff := bytes.Buffer{}
+	userDataBuff.Write(c.clientCoreData.Pack())
+	userDataBuff.Write(c.clientNetworkData.Pack())
+	userDataBuff.Write(c.clientSecurityData.Pack())
+
+	ccReq := gcc.MakeConferenceCreateRequest(userDataBuff.Bytes())
+	connectInitial := NewConnectInitial(ccReq)
+	connectInitialBerEncoded := connectInitial.BER()
+
+	dataBuff := &bytes.Buffer{}
+	ber.WriteApplicationTag(uint8(MCS_TYPE_CONNECT_INITIAL), len(connectInitialBerEncoded), dataBuff)
+	dataBuff.Write(connectInitialBerEncoded)
+
+	_, err := c.transport.Write(dataBuff.Bytes())
+	if err != nil {
+		c.Emit("error", errors.New(fmt.Sprintf("mcs sendConnectInitial write error %v", err)))
+		return
+	}
+	glog.Debug("mcs wait for data event")
+	c.transport.Once("data", c.recvConnectResponse)
+}
+
+func (c *MCSClient) recvConnectResponse(s []byte) {
+	glog.Debug("mcs recvConnectResponse", hex.EncodeToString(s))
+	cResp, err := ReadConnectResponse(bytes.NewReader(s))
+	if err != nil {
+		c.Emit("error", errors.New(fmt.Sprintf("ReadConnectResponse %v", err)))
+		return
+	}
+	// record server gcc block
+	serverSettings := gcc.ReadConferenceCreateResponse(cResp.userData)
+	for _, v := range serverSettings {
+		switch v.(type) {
+		case *gcc.ServerSecurityData:
+			c.serverSecurityData = v.(*gcc.ServerSecurityData)
+
+		case *gcc.ServerCoreData:
+			c.serverCoreData = v.(*gcc.ServerCoreData)
+
+		case *gcc.ServerNetworkData:
+			c.serverNetworkData = v.(*gcc.ServerNetworkData)
+
+		default:
+			err := errors.New(fmt.Sprintf("unhandle server gcc block %v", reflect.TypeOf(v)))
+			glog.Error(err)
+			c.Emit("error", err)
+			return
+		}
+	}
+	glog.Debugf("serverSecurityData: %+v", c.serverSecurityData)
+	glog.Debugf("serverCoreData: %+v", c.serverCoreData)
+	glog.Info("version", c.serverCoreData.RdpVersion, c.serverCoreData.ClientRequestedProtocol)
+	glog.Debugf("serverNetworkData: %+v", c.serverNetworkData)
+	glog.Debug("mcs sendErectDomainRequest")
+	c.sendErectDomainRequest()
+
+	glog.Debug("mcs sendAttachUserRequest")
+	c.sendAttachUserRequest()
+
+	c.transport.Once("data", c.recvAttachUserConfirm)
+}
+
+func (c *MCSClient) sendErectDomainRequest() {
+	buff := &bytes.Buffer{}
+	writeMCSPDUHeader(ERECT_DOMAIN_REQUEST, 0, buff)
+	per.WriteInteger(0, buff)
+	per.WriteInteger(0, buff)
+	c.transport.Write(buff.Bytes())
+}
+
+func (c *MCSClient) sendAttachUserRequest() {
+	buff := &bytes.Buffer{}
+	writeMCSPDUHeader(ATTACH_USER_REQUEST, 0, buff)
+	c.transport.Write(buff.Bytes())
+}
+
+func (c *MCSClient) recvAttachUserConfirm(s []byte) {
+	glog.Debug("mcs recvAttachUserConfirm", hex.EncodeToString(s))
+	r := bytes.NewReader(s)
+
+	option, err := core.ReadUInt8(r)
+	if err != nil {
+		c.Emit("error", err)
+		return
+	}
+
+	if !readMCSPDUHeader(option, ATTACH_USER_CONFIRM) {
+		c.Emit("error", errors.New("NODE_RDP_PROTOCOL_T125_MCS_BAD_HEADER"))
+		return
+	}
+
+	e, err := per.ReadEnumerates(r)
+	if err != nil {
+		c.Emit("error", err)
+		return
+	}
+	if e != 0 {
+		c.Emit("error", errors.New("NODE_RDP_PROTOCOL_T125_MCS_SERVER_REJECT_USER'"))
+		return
+	}
+
+	userId, _ := per.ReadInteger16(r)
+	userId += MCS_USERCHANNEL_BASE
+	c.userId = userId
+
+	c.channels = append(c.channels, MCSChannelInfo{userId, "user"})
+	c.connectChannels()
+}
+
+func (c *MCSClient) connectChannels() {
+	glog.Debug("mcs connectChannels:", c.channelsConnected, ":", len(c.channels))
+	if c.channelsConnected == len(c.channels) && c.serverNetworkData != nil {
+		if c.nbChannelRequested < int(c.serverNetworkData.ChannelCount) {
+			//static virtual channel
+			chanId := c.serverNetworkData.ChannelIdArray[c.nbChannelRequested]
+			c.nbChannelRequested++
+			c.sendChannelJoinRequest(chanId)
+			c.transport.Once("data", c.recvChannelJoinConfirm)
+			return
+		}
+		c.transport.On("data", c.recvData)
+		// send client and sever gcc informations callback to sec
+		clientData := make([]interface{}, 0)
+		clientData = append(clientData, c.clientCoreData)
+		clientData = append(clientData, c.clientSecurityData)
+		clientData = append(clientData, c.clientNetworkData)
+
+		serverData := make([]interface{}, 0)
+		serverData = append(serverData, c.serverCoreData)
+		serverData = append(serverData, c.serverSecurityData)
+		glog.Debug("msc connectChannels callback to sec")
+		c.Emit("connect", clientData, serverData, c.userId, c.channels)
+		return
+	}
+
+	// sendChannelJoinRequest
+	glog.Debug("sendChannelJoinRequest:", c.channels[c.channelsConnected].Name)
+	c.sendChannelJoinRequest(c.channels[c.channelsConnected].ID)
+
+	c.transport.Once("data", c.recvChannelJoinConfirm)
+}
+
+func (c *MCSClient) sendChannelJoinRequest(channelId uint16) {
+	glog.Debug("mcs sendChannelJoinRequest", channelId)
+	buff := &bytes.Buffer{}
+	writeMCSPDUHeader(CHANNEL_JOIN_REQUEST, 0, buff)
+	per.WriteInteger16(c.userId-MCS_USERCHANNEL_BASE, buff)
+	per.WriteInteger16(channelId, buff)
+	c.transport.Write(buff.Bytes())
+}
+
+func (c *MCSClient) recvData(s []byte) {
+	glog.Debug("msc on data recvData:", hex.EncodeToString(s))
+
+	r := bytes.NewReader(s)
+	option, err := core.ReadUInt8(r)
+	if err != nil {
+		c.Emit("error", err)
+		return
+	}
+
+	if readMCSPDUHeader(option, DISCONNECT_PROVIDER_ULTIMATUM) {
+		c.Emit("error", errors.New("MCS DISCONNECT_PROVIDER_ULTIMATUM"))
+		c.transport.Close()
+		return
+	} else if !readMCSPDUHeader(option, c.recvOpCode) {
+		c.Emit("error", errors.New("Invalid expected MCS opcode receive data"))
+		return
+	}
+
+	userId, _ := per.ReadInteger16(r)
+	userId += MCS_USERCHANNEL_BASE
+
+	channelId, _ := per.ReadInteger16(r)
+	per.ReadEnumerates(r)
+	size, _ := per.ReadLength(r)
+	// channel ID doesn't match a requested layer
+	found := false
+	channelName := ""
+	for _, channel := range c.channels {
+		if channel.ID == channelId {
+			found = true
+			channelName = channel.Name
+			break
+		}
+	}
+	if !found {
+		glog.Error("mcs receive data for an unconnected layer")
+		return
+	}
+	left, err := core.ReadBytes(int(size), r)
+	if err != nil {
+		c.Emit("error", errors.New(fmt.Sprintf("mcs recvData get data error %v", err)))
+		return
+	}
+	glog.Debugf("mcs emit channel<%s>:%v", channelName, left)
+	c.Emit("sec", channelName, left)
+}
+
+func (c *MCSClient) recvChannelJoinConfirm(s []byte) {
+	glog.Debug("mcs recvChannelJoinConfirm", hex.EncodeToString(s))
+	r := bytes.NewReader(s)
+	option, err := core.ReadUInt8(r)
+	if err != nil {
+		c.Emit("error", err)
+		return
+	}
+
+	if !readMCSPDUHeader(option, CHANNEL_JOIN_CONFIRM) {
+		c.Emit("error", errors.New("NODE_RDP_PROTOCOL_T125_MCS_WAIT_CHANNEL_JOIN_CONFIRM"))
+		return
+	}
+
+	confirm, _ := per.ReadEnumerates(r)
+	userId, _ := per.ReadInteger16(r)
+	userId += MCS_USERCHANNEL_BASE
+
+	if c.userId != userId {
+		c.Emit("error", errors.New("NODE_RDP_PROTOCOL_T125_MCS_INVALID_USER_ID"))
+		return
+	}
+
+	channelId, _ := per.ReadInteger16(r)
+	if (confirm != 0) && (channelId == uint16(MCS_GLOBAL_CHANNEL_ID) || channelId == c.userId) {
+		c.Emit("error", errors.New("NODE_RDP_PROTOCOL_T125_MCS_SERVER_MUST_CONFIRM_STATIC_CHANNEL"))
+		return
+	}
+	glog.Debug("Confirm channelId:", channelId)
+	if confirm == 0 && c.serverNetworkData != nil {
+		for i := 0; i < int(c.serverNetworkData.ChannelCount); i++ {
+			if channelId == c.serverNetworkData.ChannelIdArray[i] {
+				var t MCSChannelInfo
+				t.ID = channelId
+				t.Name = string(c.clientNetworkData.ChannelDefArray[i].Name[:])
+				c.channels = append(c.channels, t)
+			}
+		}
+	}
+	c.channelsConnected++
+	c.connectChannels()
+}
+
+func (c *MCSClient) Pack(data []byte, channelId uint16) []byte {
+	buff := &bytes.Buffer{}
+	writeMCSPDUHeader(c.sendOpCode, 0, buff)
+	per.WriteInteger16(c.userId-MCS_USERCHANNEL_BASE, buff)
+	per.WriteInteger16(channelId, buff)
+	core.WriteUInt8(0x70, buff)
+	per.WriteLength(len(data), buff)
+	core.WriteBytes(data, buff)
+	glog.Debug("MCSClient write", channelId, ":", hex.EncodeToString(buff.Bytes()))
+	return buff.Bytes()
+}
+
+func (c *MCSClient) Write(data []byte) (n int, err error) {
+	data = c.Pack(data, c.channels[0].ID)
+	return c.transport.Write(data)
+}
+
+func (c *MCSClient) SendToChannel(channel string, data []byte) (n int, err error) {
+	channelId := c.channels[0].ID
+	for _, ch := range c.channels {
+		if channel == ch.Name {
+			channelId = ch.ID
+			break
+		}
+	}
+
+	data = c.Pack(data, channelId)
+	return c.transport.Write(data)
+}
@@ -0,0 +1,574 @@
+package t125
+
+import (
+	"bytes"
+	"encoding/hex"
+	"errors"
+	"fmt"
+	"io"
+	"reflect"
+
+	"github.com/xxx/wscan/mylib/grdp/plugin/rail"
+
+	"github.com/xxx/wscan/mylib/grdp/plugin/drdynvc"
+
+	"github.com/xxx/wscan/mylib/grdp/core"
+	"github.com/xxx/wscan/mylib/grdp/emission"
+	"github.com/xxx/wscan/mylib/grdp/glog"
+	"github.com/xxx/wscan/mylib/grdp/protocol/t125/ber"
+	"github.com/xxx/wscan/mylib/grdp/protocol/t125/gcc"
+	"github.com/xxx/wscan/mylib/grdp/protocol/t125/per"
+)
+
+// take idea from https://github.com/Madnikulin50/gordp
+
+// Multiple Channel Service layer
+
+type MCSMessage uint8
+
+const (
+	MCS_TYPE_CONNECT_INITIAL  MCSMessage = 0x65
+	MCS_TYPE_CONNECT_RESPONSE            = 0x66
+)
+
+type MCSDomainPDU uint16
+
+const (
+	ERECT_DOMAIN_REQUEST          MCSDomainPDU = 1
+	DISCONNECT_PROVIDER_ULTIMATUM              = 8
+	ATTACH_USER_REQUEST                        = 10
+	ATTACH_USER_CONFIRM                        = 11
+	CHANNEL_JOIN_REQUEST                       = 14
+	CHANNEL_JOIN_CONFIRM                       = 15
+	SEND_DATA_REQUEST                          = 25
+	SEND_DATA_INDICATION                       = 26
+)
+
+const (
+	MCS_GLOBAL_CHANNEL_ID uint16 = 1003
+	MCS_USERCHANNEL_BASE         = 1001
+)
+
+const (
+	GLOBAL_CHANNEL_NAME = "global"
+)
+
+/**
+ * Format MCS PDULayer header packet
+ * @param mcsPdu {integer}
+ * @param options {integer}
+ * @returns {type.UInt8} headers
+ */
+func writeMCSPDUHeader(mcsPdu MCSDomainPDU, options uint8, w io.Writer) {
+	core.WriteUInt8((uint8(mcsPdu)<<2)|options, w)
+}
+
+func readMCSPDUHeader(options uint8, mcsPdu MCSDomainPDU) bool {
+	return (options >> 2) == uint8(mcsPdu)
+}
+
+type DomainParameters struct {
+	MaxChannelIds   int
+	MaxUserIds      int
+	MaxTokenIds     int
+	NumPriorities   int
+	MinThoughput    int
+	MaxHeight       int
+	MaxMCSPDUsize   int
+	ProtocolVersion int
+}
+
+/**
+ * @see http://www.itu.int/rec/T-REC-T.125-199802-I/en page 25
+ * @returns {asn1.univ.Sequence}
+ */
+func NewDomainParameters(
+	maxChannelIds int,
+	maxUserIds int,
+	maxTokenIds int,
+	numPriorities int,
+	minThoughput int,
+	maxHeight int,
+	maxMCSPDUsize int,
+	protocolVersion int) *DomainParameters {
+	return &DomainParameters{maxChannelIds, maxUserIds, maxTokenIds,
+		numPriorities, minThoughput, maxHeight, maxMCSPDUsize, protocolVersion}
+}
+
+func (d *DomainParameters) BER() []byte {
+	buff := &bytes.Buffer{}
+	ber.WriteInteger(d.MaxChannelIds, buff)
+	ber.WriteInteger(d.MaxUserIds, buff)
+	ber.WriteInteger(d.MaxTokenIds, buff)
+	ber.WriteInteger(1, buff)
+	ber.WriteInteger(0, buff)
+	ber.WriteInteger(1, buff)
+	ber.WriteInteger(d.MaxMCSPDUsize, buff)
+	ber.WriteInteger(2, buff)
+	return buff.Bytes()
+}
+
+func ReadDomainParameters(r io.Reader) (*DomainParameters, error) {
+	if !ber.ReadUniversalTag(ber.TAG_SEQUENCE, true, r) {
+		return nil, errors.New("bad BER tags")
+	}
+	d := &DomainParameters{}
+	ber.ReadLength(r)
+
+	d.MaxChannelIds, _ = ber.ReadInteger(r)
+	d.MaxUserIds, _ = ber.ReadInteger(r)
+	d.MaxTokenIds, _ = ber.ReadInteger(r)
+	ber.ReadInteger(r)
+	ber.ReadInteger(r)
+	ber.ReadInteger(r)
+	d.MaxMCSPDUsize, _ = ber.ReadInteger(r)
+	ber.ReadInteger(r)
+	return d, nil
+}
+
+/**
+ * @see http://www.itu.int/rec/T-REC-T.125-199802-I/en page 25
+ * @param userData {Buffer}
+ * @returns {asn1.univ.Sequence}
+ */
+type ConnectInitial struct {
+	CallingDomainSelector []byte
+	CalledDomainSelector  []byte
+	UpwardFlag            bool
+	TargetParameters      DomainParameters
+	MinimumParameters     DomainParameters
+	MaximumParameters     DomainParameters
+	UserData              []byte
+}
+
+func NewConnectInitial(userData []byte) ConnectInitial {
+	return ConnectInitial{[]byte{0x1},
+		[]byte{0x1},
+		true,
+		*NewDomainParameters(34, 2, 0, 1, 0, 1, 0xffff, 2),
+		*NewDomainParameters(1, 1, 1, 1, 0, 1, 0x420, 2),
+		*NewDomainParameters(0xffff, 0xfc17, 0xffff, 1, 0, 1, 0xffff, 2),
+		userData}
+}
+
+func (c *ConnectInitial) BER() []byte {
+	buff := &bytes.Buffer{}
+	ber.WriteOctetstring(string(c.CallingDomainSelector), buff)
+	ber.WriteOctetstring(string(c.CalledDomainSelector), buff)
+	ber.WriteBoolean(c.UpwardFlag, buff)
+	ber.WriteEncodedDomainParams(c.TargetParameters.BER(), buff)
+	ber.WriteEncodedDomainParams(c.MinimumParameters.BER(), buff)
+	ber.WriteEncodedDomainParams(c.MaximumParameters.BER(), buff)
+	ber.WriteOctetstring(string(c.UserData), buff)
+	return buff.Bytes()
+}
+
+/**
+ * @see http://www.itu.int/rec/T-REC-T.125-199802-I/en page 25
+ * @returns {asn1.univ.Sequence}
+ */
+
+type ConnectResponse struct {
+	result           uint8
+	calledConnectId  int
+	domainParameters *DomainParameters
+	userData         []byte
+}
+
+func NewConnectResponse(userData []byte) *ConnectResponse {
+	return &ConnectResponse{0,
+		0,
+		NewDomainParameters(22, 3, 0, 1, 0, 1, 0xfff8, 2),
+		userData}
+}
+
+func ReadConnectResponse(r io.Reader) (*ConnectResponse, error) {
+	c := &ConnectResponse{}
+	var err error
+	_, err = ber.ReadApplicationTag(MCS_TYPE_CONNECT_RESPONSE, r)
+	if err != nil {
+		return nil, err
+	}
+	c.result, err = ber.ReadEnumerated(r)
+	if err != nil {
+		return nil, err
+	}
+
+	c.calledConnectId, err = ber.ReadInteger(r)
+	c.domainParameters, err = ReadDomainParameters(r)
+	if err != nil {
+		return nil, err
+	}
+	if !ber.ReadUniversalTag(ber.TAG_OCTET_STRING, false, r) {
+		return nil, errors.New("invalid expected BER tag")
+	}
+	dataLen, _ := ber.ReadLength(r)
+	c.userData, err = core.ReadBytes(dataLen, r)
+	return c, err
+}
+
+type MCSChannelInfo struct {
+	ID   uint16
+	Name string
+}
+
+type MCS struct {
+	emission.Emitter
+	transport  core.Transport
+	recvOpCode MCSDomainPDU
+	sendOpCode MCSDomainPDU
+	channels   []MCSChannelInfo
+}
+
+func NewMCS(t core.Transport, recvOpCode MCSDomainPDU, sendOpCode MCSDomainPDU) *MCS {
+	m := &MCS{
+		*emission.NewEmitter(),
+		t,
+		recvOpCode,
+		sendOpCode,
+		[]MCSChannelInfo{{MCS_GLOBAL_CHANNEL_ID, GLOBAL_CHANNEL_NAME}},
+	}
+
+	m.transport.On("close", func() {
+		m.Emit("close")
+	}).On("error", func(err error) {
+		m.Emit("error", err)
+	})
+	return m
+}
+
+func (x *MCS) Read(b []byte) (n int, err error) {
+	return x.transport.Read(b)
+}
+
+func (x *MCS) Write(b []byte) (n int, err error) {
+	return x.transport.Write(b)
+}
+
+func (m *MCS) Close() error {
+	return m.transport.Close()
+}
+
+type MCSClient struct {
+	*MCS
+	clientCoreData     *gcc.ClientCoreData
+	clientNetworkData  *gcc.ClientNetworkData
+	clientSecurityData *gcc.ClientSecurityData
+
+	serverCoreData     *gcc.ServerCoreData
+	serverNetworkData  *gcc.ServerNetworkData
+	serverSecurityData *gcc.ServerSecurityData
+
+	channelsConnected  int
+	userId             uint16
+	nbChannelRequested int
+}
+
+func NewMCSClient(t core.Transport) *MCSClient {
+	c := &MCSClient{
+		MCS:                NewMCS(t, SEND_DATA_INDICATION, SEND_DATA_REQUEST),
+		clientCoreData:     gcc.NewClientCoreData(),
+		clientNetworkData:  gcc.NewClientNetworkData(),
+		clientSecurityData: gcc.NewClientSecurityData(),
+		userId:             1 + MCS_USERCHANNEL_BASE,
+	}
+	c.transport.On("connect", c.connect)
+	return c
+}
+
+func (c *MCSClient) SetClientDesktop(width, height uint16) {
+	c.clientCoreData.DesktopWidth = width
+	c.clientCoreData.DesktopHeight = height
+}
+
+func (c *MCSClient) SetClientDynvcProtocol() {
+	c.clientCoreData.EarlyCapabilityFlags = gcc.RNS_UD_CS_SUPPORT_DYNVC_GFX_PROTOCOL
+	c.clientNetworkData.AddVirtualChannel(drdynvc.ChannelName, drdynvc.ChannelOption)
+}
+
+func (c *MCSClient) SetClientRemoteProgram() {
+	c.clientNetworkData.AddVirtualChannel(rail.ChannelName, rail.ChannelOption)
+}
+
+func (c *MCSClient) SetClientCliprdr() {
+	//c.clientNetworkData.AddVirtualChannel(cliprdr.ChannelName, cliprdr.ChannelOption)
+}
+
+func (c *MCSClient) connect(selectedProtocol uint32) {
+	glog.Debug("mcs client on connect", selectedProtocol)
+	c.clientCoreData.ServerSelectedProtocol = selectedProtocol
+
+	glog.Debugf("clientCoreData:%+v", c.clientCoreData)
+	glog.Debugf("clientNetworkData:%+v", c.clientNetworkData)
+	glog.Debugf("clientSecurityData:%+v", c.clientSecurityData)
+	// sendConnectclientCoreDataInitial
+	userDataBuff := bytes.Buffer{}
+	userDataBuff.Write(c.clientCoreData.Pack())
+	userDataBuff.Write(c.clientNetworkData.Pack())
+	userDataBuff.Write(c.clientSecurityData.Pack())
+
+	ccReq := gcc.MakeConferenceCreateRequest(userDataBuff.Bytes())
+	connectInitial := NewConnectInitial(ccReq)
+	connectInitialBerEncoded := connectInitial.BER()
+
+	dataBuff := &bytes.Buffer{}
+	ber.WriteApplicationTag(uint8(MCS_TYPE_CONNECT_INITIAL), len(connectInitialBerEncoded), dataBuff)
+	dataBuff.Write(connectInitialBerEncoded)
+
+	_, err := c.transport.Write(dataBuff.Bytes())
+	if err != nil {
+		c.Emit("error", errors.New(fmt.Sprintf("mcs sendConnectInitial write error %v", err)))
+		return
+	}
+	glog.Debug("mcs wait for data event")
+	c.transport.Once("data", c.recvConnectResponse)
+}
+
+func (c *MCSClient) recvConnectResponse(s []byte) {
+	glog.Trace("mcs recvConnectResponse", hex.EncodeToString(s))
+	cResp, err := ReadConnectResponse(bytes.NewReader(s))
+	if err != nil {
+		c.Emit("error", errors.New(fmt.Sprintf("ReadConnectResponse %v", err)))
+		return
+	}
+	// record server gcc block
+	serverSettings := gcc.ReadConferenceCreateResponse(cResp.userData)
+	for _, v := range serverSettings {
+		switch v.(type) {
+		case *gcc.ServerSecurityData:
+			c.serverSecurityData = v.(*gcc.ServerSecurityData)
+
+		case *gcc.ServerCoreData:
+			c.serverCoreData = v.(*gcc.ServerCoreData)
+
+		case *gcc.ServerNetworkData:
+			c.serverNetworkData = v.(*gcc.ServerNetworkData)
+
+		default:
+			err := errors.New(fmt.Sprintf("unhandle server gcc block %v", reflect.TypeOf(v)))
+			glog.Error(err)
+			c.Emit("error", err)
+			return
+		}
+	}
+	glog.Debugf("serverSecurityData: %+v", c.serverSecurityData)
+	glog.Debugf("serverCoreData: %+v", c.serverCoreData)
+	glog.Debugf("serverNetworkData: %+v", c.serverNetworkData)
+	glog.Debug("mcs sendErectDomainRequest")
+	c.sendErectDomainRequest()
+
+	glog.Debug("mcs sendAttachUserRequest")
+	c.sendAttachUserRequest()
+
+	c.transport.Once("data", c.recvAttachUserConfirm)
+}
+
+func (c *MCSClient) sendErectDomainRequest() {
+	buff := &bytes.Buffer{}
+	writeMCSPDUHeader(ERECT_DOMAIN_REQUEST, 0, buff)
+	per.WriteInteger(0, buff)
+	per.WriteInteger(0, buff)
+	c.transport.Write(buff.Bytes())
+}
+
+func (c *MCSClient) sendAttachUserRequest() {
+	buff := &bytes.Buffer{}
+	writeMCSPDUHeader(ATTACH_USER_REQUEST, 0, buff)
+	c.transport.Write(buff.Bytes())
+}
+
+func (c *MCSClient) recvAttachUserConfirm(s []byte) {
+	glog.Debug("mcs recvAttachUserConfirm", hex.EncodeToString(s))
+	r := bytes.NewReader(s)
+
+	option, err := core.ReadUInt8(r)
+	if err != nil {
+		c.Emit("error", err)
+		return
+	}
+
+	if !readMCSPDUHeader(option, ATTACH_USER_CONFIRM) {
+		c.Emit("error", errors.New("NODE_RDP_PROTOCOL_T125_MCS_BAD_HEADER"))
+		return
+	}
+
+	e, err := per.ReadEnumerates(r)
+	if err != nil {
+		c.Emit("error", err)
+		return
+	}
+	if e != 0 {
+		c.Emit("error", errors.New("NODE_RDP_PROTOCOL_T125_MCS_SERVER_REJECT_USER'"))
+		return
+	}
+
+	userId, _ := per.ReadInteger16(r)
+	userId += MCS_USERCHANNEL_BASE
+	c.userId = userId
+
+	c.channels = append(c.channels, MCSChannelInfo{userId, "user"})
+	c.connectChannels()
+}
+
+func (c *MCSClient) connectChannels() {
+	glog.Debug("mcs connectChannels:", c.channelsConnected, ":", len(c.channels))
+	if c.channelsConnected == len(c.channels) {
+		if c.nbChannelRequested < int(c.serverNetworkData.ChannelCount) {
+			//static virtual channel
+			chanId := c.serverNetworkData.ChannelIdArray[c.nbChannelRequested]
+			c.nbChannelRequested++
+			c.sendChannelJoinRequest(chanId)
+			c.transport.Once("data", c.recvChannelJoinConfirm)
+			return
+		}
+		c.transport.On("data", c.recvData)
+		// send client and sever gcc informations callback to sec
+		clientData := make([]interface{}, 0)
+		clientData = append(clientData, c.clientCoreData)
+		clientData = append(clientData, c.clientSecurityData)
+		clientData = append(clientData, c.clientNetworkData)
+
+		serverData := make([]interface{}, 0)
+		serverData = append(serverData, c.serverCoreData)
+		serverData = append(serverData, c.serverSecurityData)
+		glog.Debug("msc connectChannels callback to sec")
+		c.Emit("connect", clientData, serverData, c.userId, c.channels)
+		return
+	}
+
+	// sendChannelJoinRequest
+	glog.Debug("sendChannelJoinRequest:", c.channels[c.channelsConnected].Name)
+	c.sendChannelJoinRequest(c.channels[c.channelsConnected].ID)
+
+	c.transport.Once("data", c.recvChannelJoinConfirm)
+}
+
+func (c *MCSClient) sendChannelJoinRequest(channelId uint16) {
+	glog.Debug("mcs sendChannelJoinRequest", channelId)
+	buff := &bytes.Buffer{}
+	writeMCSPDUHeader(CHANNEL_JOIN_REQUEST, 0, buff)
+	per.WriteInteger16(c.userId-MCS_USERCHANNEL_BASE, buff)
+	per.WriteInteger16(channelId, buff)
+	c.transport.Write(buff.Bytes())
+}
+
+func (c *MCSClient) recvData(s []byte) {
+	glog.Trace("msc on data recvData:", hex.EncodeToString(s))
+
+	r := bytes.NewReader(s)
+	option, err := core.ReadUInt8(r)
+	if err != nil {
+		c.Emit("error", err)
+		return
+	}
+
+	if readMCSPDUHeader(option, DISCONNECT_PROVIDER_ULTIMATUM) {
+		c.Emit("error", errors.New("MCS DISCONNECT_PROVIDER_ULTIMATUM"))
+		c.transport.Close()
+		return
+	} else if !readMCSPDUHeader(option, c.recvOpCode) {
+		c.Emit("error", errors.New("Invalid expected MCS opcode receive data"))
+		return
+	}
+
+	userId, _ := per.ReadInteger16(r)
+	userId += MCS_USERCHANNEL_BASE
+
+	channelId, _ := per.ReadInteger16(r)
+	per.ReadEnumerates(r)
+	size, _ := per.ReadLength(r)
+	// channel ID doesn't match a requested layer
+	found := false
+	channelName := ""
+	for _, channel := range c.channels {
+		if channel.ID == channelId {
+			found = true
+			channelName = channel.Name
+			break
+		}
+	}
+	if !found {
+		glog.Error("mcs receive data for an unconnected layer")
+		return
+	}
+	left, err := core.ReadBytes(int(size), r)
+	if err != nil {
+		c.Emit("error", errors.New(fmt.Sprintf("mcs recvData get data error %v", err)))
+		return
+	}
+	glog.Debugf("mcs emit channel<%s>", channelName)
+	c.Emit("sec", channelName, left)
+}
+
+func (c *MCSClient) recvChannelJoinConfirm(s []byte) {
+	glog.Debug("mcs recvChannelJoinConfirm", hex.EncodeToString(s))
+	r := bytes.NewReader(s)
+	option, err := core.ReadUInt8(r)
+	if err != nil {
+		c.Emit("error", err)
+		return
+	}
+
+	if !readMCSPDUHeader(option, CHANNEL_JOIN_CONFIRM) {
+		c.Emit("error", errors.New("NODE_RDP_PROTOCOL_T125_MCS_WAIT_CHANNEL_JOIN_CONFIRM"))
+		return
+	}
+
+	confirm, _ := per.ReadEnumerates(r)
+	userId, _ := per.ReadInteger16(r)
+	userId += MCS_USERCHANNEL_BASE
+
+	if c.userId != userId {
+		c.Emit("error", errors.New("NODE_RDP_PROTOCOL_T125_MCS_INVALID_USER_ID"))
+		return
+	}
+
+	channelId, _ := per.ReadInteger16(r)
+	if (confirm != 0) && (channelId == uint16(MCS_GLOBAL_CHANNEL_ID) || channelId == c.userId) {
+		c.Emit("error", errors.New("NODE_RDP_PROTOCOL_T125_MCS_SERVER_MUST_CONFIRM_STATIC_CHANNEL"))
+		return
+	}
+	glog.Debug("Confirm channelId:", channelId)
+	if confirm == 0 {
+		for i := 0; i < int(c.serverNetworkData.ChannelCount); i++ {
+			if channelId == c.serverNetworkData.ChannelIdArray[i] {
+				var t MCSChannelInfo
+				t.ID = channelId
+				t.Name = string(c.clientNetworkData.ChannelDefArray[i].Name[:])
+				c.channels = append(c.channels, t)
+			}
+		}
+	}
+	c.channelsConnected++
+	c.connectChannels()
+}
+
+func (c *MCSClient) Pack(data []byte, channelId uint16) []byte {
+	buff := &bytes.Buffer{}
+	writeMCSPDUHeader(c.sendOpCode, 0, buff)
+	per.WriteInteger16(c.userId-MCS_USERCHANNEL_BASE, buff)
+	per.WriteInteger16(channelId, buff)
+	core.WriteUInt8(0x70, buff)
+	per.WriteLength(len(data), buff)
+	core.WriteBytes(data, buff)
+	glog.Trace("MCSClient write", channelId, ":", hex.EncodeToString(buff.Bytes()))
+	return buff.Bytes()
+}
+
+func (c *MCSClient) Write(data []byte) (n int, err error) {
+	data = c.Pack(data, c.channels[0].ID)
+	return c.transport.Write(data)
+}
+
+func (c *MCSClient) SendToChannel(channel string, data []byte) (n int, err error) {
+	channelId := c.channels[0].ID
+	for _, ch := range c.channels {
+		if channel == ch.Name {
+			channelId = ch.ID
+			break
+		}
+	}
+
+	data = c.Pack(data, channelId)
+	return c.transport.Write(data)
+}
@@ -0,0 +1,203 @@
+package per
+
+import (
+	"bytes"
+	"io"
+
+	"github.com/shadow1ng/fscan/libs/grdp/glog"
+
+	"github.com/shadow1ng/fscan/libs/grdp/core"
+)
+
+func ReadEnumerates(r io.Reader) (uint8, error) {
+	return core.ReadUInt8(r)
+}
+
+func WriteInteger(n int, w io.Writer) {
+	if n <= 0xff {
+		WriteLength(1, w)
+		core.WriteUInt8(uint8(n), w)
+	} else if n <= 0xffff {
+		WriteLength(2, w)
+		core.WriteUInt16BE(uint16(n), w)
+	} else {
+		WriteLength(4, w)
+		core.WriteUInt32BE(uint32(n), w)
+	}
+}
+
+func ReadInteger16(r io.Reader) (uint16, error) {
+	return core.ReadUint16BE(r)
+}
+
+func WriteInteger16(value uint16, w io.Writer) {
+	core.WriteUInt16BE(value, w)
+}
+
+/**
+ * @param choice {integer}
+ * @returns {type.UInt8} choice per encoded
+ */
+func WriteChoice(choice uint8, w io.Writer) {
+	core.WriteUInt8(choice, w)
+}
+
+/**
+ * @param value {raw} value to convert to per format
+ * @returns type objects per encoding value
+ */
+func WriteLength(value int, w io.Writer) {
+	if value > 0x7f {
+		core.WriteUInt16BE(uint16(value|0x8000), w)
+	} else {
+		core.WriteUInt8(uint8(value), w)
+	}
+}
+
+func ReadLength(r io.Reader) (uint16, error) {
+	b, err := core.ReadUInt8(r)
+	if err != nil {
+		return 0, nil
+	}
+	var size uint16
+	if b&0x80 > 0 {
+		b = b &^ 0x80
+		size = uint16(b) << 8
+		left, _ := core.ReadUInt8(r)
+		size += uint16(left)
+	} else {
+		size = uint16(b)
+	}
+	return size, nil
+}
+
+/**
+ * @param oid {array} oid to write
+ * @returns {type.Component} per encoded object identifier
+ */
+func WriteObjectIdentifier(oid []byte, w io.Writer) {
+	core.WriteUInt8(5, w)
+	core.WriteByte((oid[0]<<4)&(oid[1]&0x0f), w)
+	core.WriteByte(oid[2], w)
+	core.WriteByte(oid[3], w)
+	core.WriteByte(oid[4], w)
+	core.WriteByte(oid[5], w)
+}
+
+/**
+ * @param selection {integer}
+ * @returns {type.UInt8} per encoded selection
+ */
+func WriteSelection(selection uint8, w io.Writer) {
+	core.WriteUInt8(selection, w)
+}
+
+func WriteNumericString(s string, minValue int, w io.Writer) {
+	length := len(s)
+	mLength := minValue
+	if length >= minValue {
+		mLength = length - minValue
+	}
+	buff := &bytes.Buffer{}
+	for i := 0; i < length; i += 2 {
+		c1 := int(s[i])
+		c2 := 0x30
+		if i+1 < length {
+			c2 = int(s[i+1])
+		}
+		c1 = (c1 - 0x30) % 10
+		c2 = (c2 - 0x30) % 10
+		core.WriteUInt8(uint8((c1<<4)|c2), buff)
+	}
+	WriteLength(mLength, w)
+	w.Write(buff.Bytes())
+}
+
+func WritePadding(length int, w io.Writer) {
+	b := make([]byte, length)
+	w.Write(b)
+}
+
+func WriteNumberOfSet(n int, w io.Writer) {
+	core.WriteUInt8(uint8(n), w)
+}
+
+/**
+ * @param oStr {String}
+ * @param minValue {integer} default 0
+ * @returns {type.Component} per encoded octet stream
+ */
+func WriteOctetStream(oStr string, minValue int, w io.Writer) {
+	length := len(oStr)
+	mlength := minValue
+
+	if length-minValue >= 0 {
+		mlength = length - minValue
+	}
+	WriteLength(mlength, w)
+	w.Write([]byte(oStr)[:length])
+}
+
+func ReadChoice(r io.Reader) uint8 {
+	choice, _ := core.ReadUInt8(r)
+	return choice
+}
+func ReadNumberOfSet(r io.Reader) uint8 {
+	choice, _ := core.ReadUInt8(r)
+	return choice
+}
+func ReadInteger(r io.Reader) uint32 {
+	size, _ := ReadLength(r)
+	switch size {
+	case 1:
+		ret, _ := core.ReadUInt8(r)
+		return uint32(ret)
+	case 2:
+		ret, _ := core.ReadUint16BE(r)
+		return uint32(ret)
+	case 4:
+		ret, _ := core.ReadUInt32BE(r)
+		return ret
+	default:
+		glog.Info("ReadInteger")
+	}
+	return 0
+}
+
+func ReadObjectIdentifier(r io.Reader, oid []byte) bool {
+	size, _ := ReadLength(r)
+	if size != 5 {
+		return false
+	}
+
+	a_oid := []byte{0, 0, 0, 0, 0, 0}
+	t12, _ := core.ReadByte(r)
+	a_oid[0] = t12 >> 4
+	a_oid[1] = t12 & 0x0f
+	a_oid[2], _ = core.ReadByte(r)
+	a_oid[3], _ = core.ReadByte(r)
+	a_oid[4], _ = core.ReadByte(r)
+	a_oid[5], _ = core.ReadByte(r)
+
+	for i, _ := range oid {
+		if oid[i] != a_oid[i] {
+			return false
+		}
+	}
+	return true
+}
+func ReadOctetStream(r io.Reader, s string, min int) bool {
+	ln, _ := ReadLength(r)
+	size := int(ln) + min
+	if size != len(s) {
+		return false
+	}
+	for i := 0; i < size; i++ {
+		b, _ := core.ReadByte(r)
+		if b != s[i] {
+			return false
+		}
+	}
+
+	return true
+}
@@ -0,0 +1,482 @@
+package tpkt
+
+import (
+	"bytes"
+	"encoding/binary"
+	"encoding/hex"
+	"fmt"
+	"reflect"
+	"strings"
+	"time"
+
+	"github.com/shadow1ng/fscan/libs/grdp/core"
+	"github.com/shadow1ng/fscan/libs/grdp/emission"
+	"github.com/shadow1ng/fscan/libs/grdp/glog"
+	"github.com/shadow1ng/fscan/libs/grdp/protocol/nla"
+)
+
+// take idea from https://github.com/Madnikulin50/gordp
+
+/**
+ * Type of tpkt packet
+ * Fastpath is use to shortcut RDP stack
+ * @see http://msdn.microsoft.com/en-us/library/cc240621.aspx
+ * @see http://msdn.microsoft.com/en-us/library/cc240589.aspx
+ */
+const (
+	FASTPATH_ACTION_FASTPATH = 0x0
+	FASTPATH_ACTION_X224     = 0x3
+)
+
+/**
+ * TPKT layer of rdp stack
+ */
+type TPKT struct {
+	emission.Emitter
+	Conn             *core.SocketLayer
+	ntlm             *nla.NTLMv2
+	secFlag          byte
+	lastShortLength  int
+	fastPathListener core.FastPathListener
+	ntlmSec          *nla.NTLMv2Security
+	nlaAuthOnly      bool // NLA仅验证模式：验证成功后立即断开，不建立会话
+}
+
+var OsVersion = map[string]string{
+	"3.10.511":      "Windows NT 3.1",
+	"3.50.807":      "Windows NT 3.5",
+	"3.10.528":      "Windows NT 3.1, Service Pack 3",
+	"3.51.1057":     "Windows NT 3.51",
+	"4.00.950":      "Windows 95",
+	"4.0.1381":      "Windows NT 4.0",
+	"4.10.1998":     "Windows 98",
+	"4.10.2222":     "Windows 98 Second Edition (SE)",
+	"5.0.2195":      "Windows 2000",
+	"4.90.3000":     "Windows Me",
+	"5.1.2600":      "Windows XP/Windows XP, Service Pack 3",
+	"5.1.2600.1105": "Windows XP, Service Pack 1",
+	"5.2.3790":      "Windows Server 2003/Windows Server 2003 R2/Windows Server 2003, Service Pack 2",
+	"5.1.2600.2180": "Windows XP, Service Pack 2",
+	"5.2.3790.1180": "Windows Server 2003, Service Pack 1",
+	"6.0.6000":      "Windows Vista",
+	"5.2.4500":      "Windows Home Server",
+	"6.0.6001":      "Windows Vista, Service Pack 1/Windows Server 2008",
+	"6.0.6002":      "Windows Vista, Service Pack 2/Windows Server 2008, Service Pack 2",
+	"6.1.7600":      "Windows 7/Windows Server 2008 R2",
+	"6.1.7601":      "Windows 7, Service Pack 1/Windows Server 2008 R2, Service Pack 1",
+	"6.1.8400":      "Windows Home Server 2011",
+	"6.2.9200":      "Windows Server 2012/Windows 8",
+	"6.3.9600":      "Windows 8.1/Windows Server 2012 R2",
+	"10.0.10240":    "Windows 10, Version 1507",
+	"10.0.10586":    "Windows 10, Version 1511",
+	"10.0.14393":    "Windows 10, Version 1607/Windows Server 2016, Version 1607",
+	"10.0.15063":    "Windows 10, Version 1703",
+	"10.0.16299":    "Windows 10, Version 1709",
+	"10.0.17134":    "Windows 10, Version 1803",
+	"10.0.17763":    "Windows Server 2019, Version 1809/Windows 10, Version 1809",
+	"6.0.6003":      "Windows Server 2008, Service Pack 2, Rollup KB4489887",
+	"10.0.18362":    "Windows 10, Version 1903",
+	"10.0.18363":    "Windows 10, Version 1909/Windows Server, Version 1909",
+	"10.0.19041":    "Windows 10, Version 2004/Windows Server, Version 2004",
+	"10.0.19042":    "Windows 10, Version 20H2/Windows Server, Version 20H2",
+	"10.0.19043":    "Windows 10, Version 21H1",
+	"10.0.20348":    "Windows Server 2022",
+	"10.0.22000":    "Windows 11, Version 21H2",
+	"10.0.19044":    "Windows 10, Version 21H2",
+}
+
+func New(s *core.SocketLayer, ntlm *nla.NTLMv2) *TPKT {
+	t := &TPKT{
+		Emitter: *emission.NewEmitter(),
+		Conn:    s,
+		secFlag: 0,
+		ntlm:    ntlm}
+	core.StartReadBytes(2, s, t.recvHeader)
+	return t
+}
+
+func (t *TPKT) StartTLS() error {
+	return t.Conn.StartTLS()
+}
+
+// SetNLAAuthOnly 设置NLA仅验证模式
+// 启用后，NLA认证成功即返回，不发送credentials建立会话，不会挤掉已登录用户
+func (t *TPKT) SetNLAAuthOnly(authOnly bool) {
+	t.nlaAuthOnly = authOnly
+}
+
+func (t *TPKT) StartNLA() error {
+	err := t.StartTLS()
+	if err != nil {
+		glog.Info("start tls failed", err)
+		return err
+	}
+	req := nla.EncodeDERTRequest([]nla.Message{t.ntlm.GetNegotiateMessage()}, nil, nil)
+	_, err = t.Conn.Write(req)
+	if err != nil {
+		glog.Info("send NegotiateMessage", err)
+		return err
+	}
+
+	resp := make([]byte, 1024)
+	n, err := t.Conn.Read(resp)
+	if err != nil {
+		return fmt.Errorf("read %s", err)
+	} else {
+		glog.Debug("StartNLA Read success")
+	}
+	return t.recvChallenge(resp[:n])
+}
+
+func (t *TPKT) recvChallenge(data []byte) error {
+	//own add
+	glog.Debug("start recv challenge......")
+	info := make(map[string]any)
+	type NTLMChallenge struct {
+		Signature              [8]byte
+		MessageType            uint32
+		TargetNameLen          uint16
+		TargetNameMaxLen       uint16
+		TargetNameBufferOffset uint32
+		NegotiateFlags         uint32
+		ServerChallenge        uint64
+		Reserved               uint64
+		TargetInfoLen          uint16
+		TargetInfoMaxLen       uint16
+		TargetInfoBufferOffset uint32
+		Version                [8]byte
+		// Payload (variable)
+	}
+	var challengeLen = 56
+
+	challengeStartOffset := bytes.Index(data, []byte{'N', 'T', 'L', 'M', 'S', 'S', 'P', 0})
+	if challengeStartOffset == -1 {
+	}
+	if len(data) < challengeStartOffset+challengeLen {
+		return nil
+	}
+	var responseData NTLMChallenge
+	response := data[challengeStartOffset:]
+	responseBuf := bytes.NewBuffer(response)
+	err := binary.Read(responseBuf, binary.LittleEndian, &responseData)
+	if err != nil {
+		return err
+	}
+	// Check if valid NTLM challenge response message structure
+	if responseData.MessageType != 0x00000002 ||
+		responseData.Reserved != 0 ||
+		!reflect.DeepEqual(responseData.Version[4:], []byte{0, 0, 0, 0xF}) {
+		return nil
+	}
+
+	// Parse: Version
+	type version struct {
+		MajorVersion byte
+		MinorVersion byte
+		BuildNumber  uint16
+	}
+	var versionData version
+	versionBuf := bytes.NewBuffer(responseData.Version[:4])
+	err = binary.Read(versionBuf, binary.LittleEndian, &versionData)
+	if err != nil {
+		return err
+	}
+	ProductVersion := fmt.Sprintf("%d.%d.%d", versionData.MajorVersion,
+		versionData.MinorVersion,
+		versionData.BuildNumber)
+	glog.Debug("get product version: Windows", ProductVersion)
+	info["ProductVersion"] = ProductVersion
+
+	v, ok := OsVersion[ProductVersion]
+	if ok {
+		info["OsVerion"] = v
+		glog.Debug("get os version:", v)
+	} else {
+		if versionData.BuildNumber >= 22000 {
+			info["OsVerion"] = fmt.Sprintf("Windows 11, version:%s", ProductVersion)
+		} else {
+			info["OsVerion"] = fmt.Sprintf("Windows %s", ProductVersion)
+		}
+	}
+
+	// Parse: TargetName
+	targetNameLen := int(responseData.TargetNameLen)
+	if targetNameLen > 0 {
+		startIdx := int(responseData.TargetNameBufferOffset)
+		endIdx := startIdx + targetNameLen
+		targetName := strings.ReplaceAll(string(response[startIdx:endIdx]), "\x00", "")
+		info["TargetName"] = targetName
+		glog.Debug("target Name = ", targetName)
+	}
+
+	// Parse: TargetInfo
+	AvIDMap := map[uint16]string{
+		1: "NetBIOSComputerName",
+		2: "NetBIOSDomainName",
+		3: "FQDN", // DNS Computer Name
+		4: "DNSDomainName",
+		5: "DNSTreeName",
+		7: "Timestamp",
+		9: "MsvAvTargetName",
+	}
+
+	type AVPair struct {
+		AvID  uint16
+		AvLen uint16
+		// Value (variable)
+	}
+	var avPairLen = 4
+	targetInfoLen := int(responseData.TargetInfoLen)
+	if targetInfoLen > 0 {
+		startIdx := int(responseData.TargetInfoBufferOffset)
+		if startIdx+targetInfoLen > len(response) {
+			return fmt.Errorf("Invalid TargetInfoLen value")
+		}
+		var avPair AVPair
+		avPairBuf := bytes.NewBuffer(response[startIdx : startIdx+avPairLen])
+		err = binary.Read(avPairBuf, binary.LittleEndian, &avPair)
+		if err != nil {
+			return err
+		}
+		currIdx := startIdx
+		for avPair.AvID != 0 {
+			if field, exists := AvIDMap[avPair.AvID]; exists {
+				var value string
+				r := response[currIdx+avPairLen : currIdx+avPairLen+int(avPair.AvLen)]
+				if avPair.AvID == 7 {
+					unixStamp := binary.LittleEndian.Uint64(r)/10000000 - 11644473600
+					tm := time.Unix(int64(unixStamp), 0)
+					value = tm.Format("2006-01-02 15:04:05")
+				} else {
+					value = strings.ReplaceAll(string(r), "\x00", "")
+				}
+				info[field] = value
+			}
+			currIdx += avPairLen + int(avPair.AvLen)
+			if currIdx+avPairLen > startIdx+targetInfoLen {
+				return fmt.Errorf("Invalid AV_PAIR list")
+			}
+			avPairBuf = bytes.NewBuffer(response[currIdx : currIdx+avPairLen])
+			err = binary.Read(avPairBuf, binary.LittleEndian, &avPair)
+			if err != nil {
+				return err
+			}
+		}
+	}
+	glog.Info("get os info by NLA done !")
+	glog.Info("=======================================")
+	for key, value := range info {
+		glog.Info(key, ":", value)
+	}
+	glog.Info("=======================================")
+
+	//判断是否存在windows域
+	if netBiosDomainName, exists := info["NetBIOSDomainName"]; exists {
+		if netBiosComputerName, exists := info["NetBIOSComputerName"]; exists {
+			if netBiosDomainName == netBiosComputerName {
+				info["DNSDomainName"], info["NetBIOSDomainName"] = "WORKGROUP", "WORKGROUP"
+				//delete(info, "FQDN")
+			} else {
+
+			}
+		}
+	}
+
+	t.Emit("os_info", info)
+
+	// end
+	glog.Trace("recvChallenge", hex.EncodeToString(data))
+	tsreq, err := nla.DecodeDERTRequest(data)
+	if err != nil {
+		glog.Info("DecodeDERTRequest", err)
+		return err
+	}
+	glog.Debugf("tsreq:%+v", tsreq)
+	// get pubkey
+	pubkey, err := t.Conn.TlsPubKey()
+	glog.Debugf("pubkey=%+v", pubkey)
+
+	authMsg, ntlmSec := t.ntlm.GetAuthenticateMessage(tsreq.NegoTokens[0].Data)
+	t.ntlmSec = ntlmSec
+
+	encryptPubkey := ntlmSec.GssEncrypt(pubkey)
+	req := nla.EncodeDERTRequest([]nla.Message{authMsg}, nil, encryptPubkey)
+	_, err = t.Conn.Write(req)
+	if err != nil {
+		glog.Info("send AuthenticateMessage", err)
+		return err
+	}
+	resp := make([]byte, 1024)
+	n, err := t.Conn.Read(resp)
+	if err != nil {
+		glog.Error("Read:", err)
+		return fmt.Errorf("read %s", err)
+	} else {
+		glog.Debug("recvChallenge Read success")
+	}
+	return t.recvPubKeyInc(resp[:n])
+}
+
+// ErrNLAAuthSuccess 表示NLA仅验证模式下认证成功（非真正错误）
+var ErrNLAAuthSuccess = fmt.Errorf("NLA_AUTH_SUCCESS")
+
+func (t *TPKT) recvPubKeyInc(data []byte) error {
+	glog.Trace("recvPubKeyInc", hex.EncodeToString(data))
+
+	tsreq, err := nla.DecodeDERTRequest(data)
+	if err != nil {
+		glog.Info("DecodeDERTRequest", err)
+		return err
+	}
+
+	// 检查服务器是否返回错误码（认证失败）
+	// 常见错误码: 0xC000006D = STATUS_LOGON_FAILURE (密码错误)
+	if tsreq.ErrorCode != 0 {
+		glog.Error("NLA authentication failed with error code:", tsreq.ErrorCode)
+		return fmt.Errorf("NLA auth failed: error code %d (0x%X)", tsreq.ErrorCode, uint32(tsreq.ErrorCode))
+	}
+
+	// 验证 PubKeyAuth 不为空（认证成功的标志）
+	if len(tsreq.PubKeyAuth) == 0 {
+		glog.Error("NLA authentication failed: empty PubKeyAuth")
+		return fmt.Errorf("NLA auth failed: empty PubKeyAuth")
+	}
+
+	glog.Trace("PubKeyAuth:", tsreq.PubKeyAuth)
+
+	// 尝试解密验证公钥，但不作为强制失败条件
+	// 因为某些Windows版本的响应格式可能略有不同
+	pubkey := t.ntlmSec.GssDecrypt(tsreq.PubKeyAuth)
+	if pubkey == nil {
+		glog.Debug("GssDecrypt returned nil, but continuing since no ErrorCode was returned")
+	}
+
+	// NLA仅验证模式：凭据已验证成功，不发送credentials，直接返回
+	// 这样不会建立RDP会话，不会挤掉已登录用户
+	if t.nlaAuthOnly {
+		glog.Info("NLA auth-only mode: credentials verified, skipping session establishment")
+		return ErrNLAAuthSuccess
+	}
+
+	domain, username, password := t.ntlm.GetEncodedCredentials()
+	credentials := nla.EncodeDERTCredentials(domain, username, password)
+	authInfo := t.ntlmSec.GssEncrypt(credentials)
+	req := nla.EncodeDERTRequest(nil, authInfo, nil)
+	_, err = t.Conn.Write(req)
+	if err != nil {
+		glog.Info("send AuthenticateMessage", err)
+		return err
+	}
+
+	return nil
+}
+
+func (t *TPKT) Read(b []byte) (n int, err error) {
+	return t.Conn.Read(b)
+}
+
+func (t *TPKT) Write(data []byte) (n int, err error) {
+	buff := &bytes.Buffer{}
+	core.WriteUInt8(FASTPATH_ACTION_X224, buff)
+	core.WriteUInt8(0, buff)
+	core.WriteUInt16BE(uint16(len(data)+4), buff)
+	buff.Write(data)
+	glog.Trace("tpkt Write", hex.EncodeToString(buff.Bytes()))
+	return t.Conn.Write(buff.Bytes())
+}
+
+func (t *TPKT) Close() error {
+	return t.Conn.Close()
+}
+
+func (t *TPKT) SetFastPathListener(f core.FastPathListener) {
+	t.fastPathListener = f
+}
+
+func (t *TPKT) SendFastPath(secFlag byte, data []byte) (n int, err error) {
+	buff := &bytes.Buffer{}
+	core.WriteUInt8(FASTPATH_ACTION_FASTPATH|((secFlag&0x3)<<6), buff)
+	core.WriteUInt16BE(uint16(len(data)+3)|0x8000, buff)
+	buff.Write(data)
+	glog.Trace("TPTK SendFastPath", hex.EncodeToString(buff.Bytes()))
+	return t.Conn.Write(buff.Bytes())
+}
+
+func (t *TPKT) recvHeader(s []byte, err error) {
+	glog.Trace("tpkt recvHeader", hex.EncodeToString(s), err)
+	if err != nil {
+		t.Emit("error", err)
+		return
+	}
+	r := bytes.NewReader(s)
+	version, _ := core.ReadUInt8(r)
+	if version == FASTPATH_ACTION_X224 {
+		glog.Debug("tptk recvHeader FASTPATH_ACTION_X224, wait for recvExtendedHeader")
+		core.StartReadBytes(2, t.Conn, t.recvExtendedHeader)
+	} else {
+		glog.Debug("[-] !!!! version is not FASTPATH_ACTION_X224, version=", version)
+		t.secFlag = (version >> 6) & 0x3
+		length, _ := core.ReadUInt8(r)
+		t.lastShortLength = int(length)
+		glog.Debug("last read len:", length)
+		if t.lastShortLength&0x80 != 0 {
+			core.StartReadBytes(1, t.Conn, t.recvExtendedFastPathHeader)
+		} else {
+			//core.StartReadBytes(1, t.Conn, t.recvExtendedFastPathHeader)
+			if t.lastShortLength >= 2 {
+				core.StartReadBytes(t.lastShortLength-2, t.Conn, t.recvFastPath)
+			} else {
+				glog.Debug("lastShortLength = 0")
+			}
+		}
+	}
+}
+
+func (t *TPKT) recvExtendedHeader(s []byte, err error) {
+	glog.Trace("tpkt recvExtendedHeader", hex.EncodeToString(s), err)
+	if err != nil {
+		return
+	}
+	r := bytes.NewReader(s)
+	size, _ := core.ReadUint16BE(r)
+	glog.Debug("tpkt wait recvData:", size)
+	core.StartReadBytes(int(size-4), t.Conn, t.recvData)
+}
+
+func (t *TPKT) recvData(s []byte, err error) {
+	glog.Trace("tpkt recvData", hex.EncodeToString(s), err)
+	if err != nil {
+		return
+	}
+	t.Emit("data", s)
+	core.StartReadBytes(2, t.Conn, t.recvHeader)
+}
+
+func (t *TPKT) recvExtendedFastPathHeader(s []byte, err error) {
+	glog.Trace("tpkt recvExtendedFastPathHeader", hex.EncodeToString(s))
+	r := bytes.NewReader(s)
+	rightPart, err := core.ReadUInt8(r)
+	if err != nil {
+		glog.Error("TPTK recvExtendedFastPathHeader", err)
+		return
+	}
+
+	leftPart := t.lastShortLength & ^0x80
+	packetSize := (leftPart << 8) + int(rightPart)
+	if packetSize == 0 {
+		fmt.Println("get packetSize,rightPart=", packetSize, rightPart)
+		t.Emit("close")
+	} else {
+		core.StartReadBytes(packetSize-3, t.Conn, t.recvFastPath)
+	}
+}
+
+func (t *TPKT) recvFastPath(s []byte, err error) {
+	glog.Trace("tpkt recvFastPath")
+	if err != nil {
+		return
+	}
+
+	t.fastPathListener.RecvFastPath(t.secFlag, s)
+	core.StartReadBytes(2, t.Conn, t.recvHeader)
+}
@@ -0,0 +1,431 @@
+package x224
+
+import (
+	"bytes"
+	"encoding/hex"
+	"errors"
+	"fmt"
+
+	"github.com/shadow1ng/fscan/libs/grdp/glog"
+
+	"github.com/lunixbochs/struc"
+	"github.com/shadow1ng/fscan/libs/grdp/core"
+	"github.com/shadow1ng/fscan/libs/grdp/emission"
+	"github.com/shadow1ng/fscan/libs/grdp/protocol/tpkt"
+)
+
+// take idea from https://github.com/Madnikulin50/gordp
+
+/**
+ * Message type present in X224 packet header
+ */
+type MessageType byte
+
+const (
+	TPDU_CONNECTION_REQUEST MessageType = 0xE0
+	TPDU_CONNECTION_CONFIRM             = 0xD0
+	TPDU_DISCONNECT_REQUEST             = 0x80
+	TPDU_DATA                           = 0xF0
+	TPDU_ERROR                          = 0x70
+)
+
+/**
+ * Type of negotiation present in negotiation packet
+ */
+type NegotiationType byte
+
+const (
+	TYPE_RDP_NEG_REQ     NegotiationType = 0x01
+	TYPE_RDP_NEG_RSP                     = 0x02
+	TYPE_RDP_NEG_FAILURE                 = 0x03
+)
+
+/**
+ * Protocols available for x224 layer
+ */
+
+const (
+	PROTOCOL_RDP       uint32 = 0x00000000
+	PROTOCOL_SSL              = 0x00000001
+	PROTOCOL_HYBRID           = 0x00000002
+	PROTOCOL_HYBRID_EX        = 0x00000008
+)
+
+/**
+ * Use to negotiate security layer of RDP stack
+ * In node-rdpjs only ssl is available
+ * @param opt {object} component type options
+ * @see request -> http://msdn.microsoft.com/en-us/library/cc240500.aspx
+ * @see response -> http://msdn.microsoft.com/en-us/library/cc240506.aspx
+ * @see failure ->http://msdn.microsoft.com/en-us/library/cc240507.aspx
+ */
+type Negotiation struct {
+	Type   NegotiationType `struc:"byte"`
+	Flag   uint8           `struc:"uint8"`
+	Length uint16          `struc:"little"`
+	Result uint32          `struc:"little"`
+}
+
+func NewNegotiation() *Negotiation {
+	return &Negotiation{0, 0, 0x0008 /*constant*/, PROTOCOL_RDP}
+}
+
+const (
+	//The server requires that the client support Enhanced RDP Security (section 5.4) with either TLS 1.0, 1.1 or 1.2 (section 5.4.5.1) or CredSSP (section 5.4.5.2). If only CredSSP was requested then the server only supports TLS.
+	SSL_REQUIRED_BY_SERVER = 0x00000001
+
+	//The server is configured to only use Standard RDP Security mechanisms (section 5.3) and does not support any External Security Protocols (section 5.4.5).
+	SSL_NOT_ALLOWED_BY_SERVER = 0x00000002
+
+	//The server does not possess a valid authentication certificate and cannot initialize the External Security Protocol Provider (section 5.4.5).
+	SSL_CERT_NOT_ON_SERVER = 0x00000003
+
+	//The list of requested security protocols is not consistent with the current security protocol in effect. This error is only possible when the Direct Approach (sections 5.4.2.2 and 1.3.1.2) is used and an External Security Protocol (section 5.4.5) is already being used.
+	INCONSISTENT_FLAGS = 0x00000004
+
+	//The server requires that the client support Enhanced RDP Security (section 5.4) with CredSSP (section 5.4.5.2).
+	HYBRID_REQUIRED_BY_SERVER = 0x00000005
+
+	//The server requires that the client support Enhanced RDP Security (section 5.4) with TLS 1.0, 1.1 or 1.2 (section 5.4.5.1) and certificate-based client authentication.<4>
+	SSL_WITH_USER_AUTH_REQUIRED_BY_SERVER = 0x00000006
+)
+
+/**
+ * X224 client connection request
+ * @param opt {object} component type options
+ * @see	http://msdn.microsoft.com/en-us/library/cc240470.aspx
+ */
+type ClientConnectionRequestPDU struct {
+	Len               uint8
+	Code              MessageType
+	Padding1          uint16
+	Padding2          uint16
+	Padding3          uint8
+	Cookie            []byte
+	requestedProtocol uint32
+	ProtocolNeg       *Negotiation
+}
+
+func NewClientConnectionRequestPDU(cookie []byte, requestedProtocol uint32) *ClientConnectionRequestPDU {
+	x := ClientConnectionRequestPDU{0, TPDU_CONNECTION_REQUEST, 0, 0, 0,
+		cookie, requestedProtocol, NewNegotiation()}
+
+	x.Len = 6
+	if len(cookie) > 0 {
+		x.Len += uint8(len(cookie) + 2)
+	}
+	if x.requestedProtocol > PROTOCOL_RDP {
+		x.Len += 8
+	}
+
+	return &x
+}
+
+func (x *ClientConnectionRequestPDU) Serialize() []byte {
+	buff := &bytes.Buffer{}
+	core.WriteUInt8(x.Len, buff)
+	core.WriteUInt8(uint8(x.Code), buff)
+	core.WriteUInt16BE(x.Padding1, buff)
+	core.WriteUInt16BE(x.Padding2, buff)
+	core.WriteUInt8(x.Padding3, buff)
+
+	if len(x.Cookie) > 0 {
+		buff.Write(x.Cookie)
+		core.WriteUInt8(0x0D, buff)
+		core.WriteUInt8(0x0A, buff)
+	}
+
+	if x.requestedProtocol > PROTOCOL_RDP {
+		struc.Pack(buff, x.ProtocolNeg)
+	}
+
+	return buff.Bytes()
+}
+
+/**
+ * X224 Server connection confirm
+ * @param opt {object} component type options
+ * @see	http://msdn.microsoft.com/en-us/library/cc240506.aspx
+ */
+type ServerConnectionConfirm struct {
+	Len         uint8
+	Code        MessageType
+	Padding1    uint16
+	Padding2    uint16
+	Padding3    uint8
+	ProtocolNeg *Negotiation
+}
+
+/**
+ * Header of each data message from x224 layer
+ * @returns {type.Component}
+ */
+type DataHeader struct {
+	Header      uint8       `struc:"little"`
+	MessageType MessageType `struc:"uint8"`
+	Separator   uint8       `struc:"little"`
+}
+
+func NewDataHeader() *DataHeader {
+	return &DataHeader{2, TPDU_DATA /* constant */, 0x80 /*constant*/}
+}
+
+/**
+ * Common X224 Automata
+ * @param presentation {Layer} presentation layer
+ */
+type X224 struct {
+	emission.Emitter
+	transport         core.Transport
+	requestedProtocol uint32
+	selectedProtocol  uint32
+	dataHeader        *DataHeader
+}
+
+func New(t core.Transport) *X224 {
+	x := &X224{
+		*emission.NewEmitter(),
+		t,
+		PROTOCOL_RDP | PROTOCOL_SSL | PROTOCOL_HYBRID,
+		PROTOCOL_SSL,
+		NewDataHeader(),
+	}
+
+	t.On("close", func() {
+		x.Emit("close")
+	}).On("error", func(err error) {
+		x.Emit("error", err)
+	})
+
+	return x
+}
+
+func (x *X224) ServerChooseProtocol() uint32 {
+	return x.selectedProtocol
+}
+
+func (x *X224) Read(b []byte) (n int, err error) {
+	return x.transport.Read(b)
+}
+
+func (x *X224) Write(b []byte) (n int, err error) {
+	buff := &bytes.Buffer{}
+	err = struc.Pack(buff, x.dataHeader)
+	if err != nil {
+		return 0, err
+	}
+	buff.Write(b)
+
+	glog.Trace("x224 write:", hex.EncodeToString(buff.Bytes()))
+	return x.transport.Write(buff.Bytes())
+}
+
+func (x *X224) Close() error {
+	return x.transport.Close()
+}
+
+func (x *X224) SetRequestedProtocol(p uint32) {
+	x.requestedProtocol = p
+}
+
+func (x *X224) Connect() error {
+	if x.transport == nil {
+		return errors.New("no transport")
+	}
+	cookie := "Cookie: mstshash=bob"
+	message := NewClientConnectionRequestPDU([]byte(cookie), x.requestedProtocol)
+	message.ProtocolNeg.Type = TYPE_RDP_NEG_REQ
+	message.ProtocolNeg.Result = uint32(x.requestedProtocol)
+
+	glog.Debug("x224 sendConnectionRequest", hex.EncodeToString(message.Serialize()))
+	_, err := x.transport.Write(message.Serialize())
+	x.transport.Once("data", x.recvConnectionConfirm)
+	return err
+}
+
+func (x *X224) recvConnectionConfirm(s []byte) {
+	/*
+		在Windows的远程桌面协议（RDP）交互过程中，NLA是指网络级别身份验证（Network Level Authentication）。NLA是一种用于增强远程桌面连接安全性的机制。在启用了NLA的情况下，客户端必须在建立RDP会话之前通过网络级别的身份验证，这样可以防止未经授权的用户连接到远程桌面服务器。
+
+		NLA的优点
+		提高安全性：在建立RDP会话之前进行身份验证，确保只有经过验证的用户才能连接。
+		减少资源消耗：因为身份验证是在连接建立之前完成的，可以减少未授权用户消耗的系统资源。
+		RDP协议中的不同连接类型
+		RDP协议有几种不同的连接类型，它们在使用NLA方面有所不同：
+
+		PROTOCOL_RDP：标准的RDP连接方式。这是最早期的RDP连接类型，不使用任何额外的安全层。
+
+		PROTOCOL_SSL：使用SSL/TLS加密的RDP连接方式。这种方式可以增强连接的安全性。
+
+		PROTOCOL_HYBRID：混合连接方式，通常指的是使用NLA和TLS结合的连接方式。它先进行网络级别的身份验证（NLA），然后使用TLS加密传输数据。
+
+		PROTOCOL_HYBRID_EX：这是PROTOCOL_HYBRID的扩展版本，可能包含额外的安全特性或增强功能，具体细节通常会在相关文档中描述。
+
+		NLA与不同连接类型的关系
+		PROTOCOL_RDP：不使用NLA，因为这是最基本的连接方式。
+		PROTOCOL_SSL：可以与NLA结合使用。首先通过NLA进行身份验证，然后使用SSL/TLS加密数据传输。
+		PROTOCOL_HYBRID：使用NLA进行身份验证，然后通过TLS加密数据传输。因此，NLA在这种连接类型中是必需的。
+		PROTOCOL_HYBRID_EX：作为PROTOCOL_HYBRID的扩展版本，也可以使用NLA进行身份验证，并结合其他安全增强特性。
+
+		总的来说，除了最基本的PROTOCOL_RDP之外，其他连接类型（PROTOCOL_SSL、PROTOCOL_HYBRID、PROTOCOL_HYBRID_EX）都可以使用或要求使用NLA来提高连接的安全性。
+	*/
+
+	/*
+		总体而言，较早的Windows版本（如Windows 2000、Windows XP、Windows Server 2003等）默认使用基本的RDP协议（PROTOCOL_RDP），而现代的Windows版本（如Windows 7及之后的版本）默认启用网络级别身份验证（NLA）并支持SSL/TLS加密，以提高连接的安全性。具体的默认协议如下：
+
+		Windows 2000、Windows XP、Windows Server 2003：	PROTOCOL_RDP
+		Windows Vista、Windows Server 2008：				PROTOCOL_RDP（NLA可配置）
+		Windows 7、Windows Server 2008 R2：				PROTOCOL_HYBRID（默认启用NLA）
+		Windows 8、Windows Server 2012：					PROTOCOL_HYBRID（默认启用NLA）
+		Windows 8.1、Windows Server 2012 R2：			PROTOCOL_HYBRID（默认启用NLA）
+		Windows 10、Windows Server 2016：				PROTOCOL_HYBRID（默认启用NLA）
+		Windows 10（1809及以上版本）、Windows Server 2019：PROTOCOL_HYBRID（默认启用NLA）
+		Windows 11、Windows Server 2022：				PROTOCOL_HYBRID（默认启用NLA）
+
+	*/
+	glog.Debug("x224 recvConnectionConfirm ", hex.EncodeToString(s))
+	r := bytes.NewReader(s)
+	ln, _ := core.ReadUInt8(r)
+
+	if ln > 6 {
+		message := &ServerConnectionConfirm{}
+		if err := struc.Unpack(bytes.NewReader(s), message); err != nil {
+			glog.Error("ReadServerConnectionConfirm err", err)
+			return
+		}
+		glog.Debugf("message: %+v", *message.ProtocolNeg)
+
+		if message.ProtocolNeg.Type == TYPE_RDP_NEG_FAILURE {
+			glog.Error(fmt.Sprintf("NODE_RDP_PROTOCOL_X224_NEG_FAILURE with code: %d,see https://msdn.microsoft.com/en-us/library/cc240507.aspx",
+				message.ProtocolNeg.Result))
+			//only use Standard RDP Security mechanisms
+			if message.ProtocolNeg.Result == 2 {
+				glog.Info("Only use Standard RDP Security mechanisms, Reconnect with Standard RDP")
+			}
+			switch message.ProtocolNeg.Result {
+			case SSL_REQUIRED_BY_SERVER:
+				// mean need use PROTOCOL_SSL
+				glog.Info("The server requires that the client support Enhanced RDP Security")
+				x.Emit("reconnect", PROTOCOL_SSL)
+			case SSL_NOT_ALLOWED_BY_SERVER:
+				// mean need to use PROTOCOL_RDP only
+				glog.Info("The server is configured to only use Standard RDP Security mechanisms")
+				x.Emit("reconnect", PROTOCOL_RDP)
+
+			case SSL_CERT_NOT_ON_SERVER:
+				glog.Info("The server does not possess a valid authentication certificate and cannot initialize the External Security Protocol Provider")
+			case INCONSISTENT_FLAGS:
+				glog.Info("The list of requested security protocols is not consistent with the current security protocol in effect. This error is only possible when the Direct Approach")
+			case HYBRID_REQUIRED_BY_SERVER:
+				glog.Info("The server requires that the client support Enhanced RDP Security (section 5.4) with CredSSP (section 5.4.5.2).")
+				x.Emit("reconnect", PROTOCOL_HYBRID)
+			case SSL_WITH_USER_AUTH_REQUIRED_BY_SERVER:
+				glog.Info("The server requires that the client support Enhanced RDP Security (section 5.4) with TLS 1.0, 1.1 or 1.2 (section 5.4.5.1) and certificate-based client authentication.<4>")
+				x.Emit("reconnect", PROTOCOL_SSL)
+				////The server requires that the client support Enhanced RDP Security (section 5.4) with either TLS 1.0, 1.1 or 1.2 (section 5.4.5.1) or CredSSP (section 5.4.5.2). If only CredSSP was requested then the server only supports TLS.
+				//	SSL_REQUIRED_BY_SERVER = 0x00000001
+				//
+				//	//The server is configured to only use Standard RDP Security mechanisms (section 5.3) and does not support any External Security Protocols (section 5.4.5).
+				//	SSL_NOT_ALLOWED_BY_SERVER = 0x00000002
+				//
+				//	//The server does not possess a valid authentication certificate and cannot initialize the External Security Protocol Provider (section 5.4.5).
+				//	SSL_CERT_NOT_ON_SERVER = 0x00000003
+				//
+				//	//The list of requested security protocols is not consistent with the current security protocol in effect. This error is only possible when the Direct Approach (sections 5.4.2.2 and 1.3.1.2) is used and an External Security Protocol (section 5.4.5) is already being used.
+				//	INCONSISTENT_FLAGS = 0x00000004
+				//
+				//	//The server requires that the client support Enhanced RDP Security (section 5.4) with CredSSP (section 5.4.5.2).
+				//	HYBRID_REQUIRED_BY_SERVER = 0x00000005
+				//
+				//	//The server requires that the client support Enhanced RDP Security (section 5.4) with TLS 1.0, 1.1 or 1.2 (section 5.4.5.1) and certificate-based client authentication.<4>
+				//	SSL_WITH_USER_AUTH_REQUIRED_BY_SERVER = 0x00000006
+			}
+
+			x.Close()
+			return
+		}
+
+		if message.ProtocolNeg.Type == TYPE_RDP_NEG_RSP {
+			glog.Info("TYPE_RDP_NEG_RSP", message.ProtocolNeg.Result)
+			x.selectedProtocol = message.ProtocolNeg.Result
+		}
+	} else {
+		x.selectedProtocol = PROTOCOL_RDP
+	}
+
+	serverChooseProtocol := "other not support protocol"
+	switch x.selectedProtocol {
+	case PROTOCOL_RDP:
+		serverChooseProtocol = "PROTOCOL_RDP"
+		x.Emit("more_timeout")
+	case PROTOCOL_SSL:
+		serverChooseProtocol = "PROTOCOL_SSL"
+	case PROTOCOL_HYBRID:
+		serverChooseProtocol = "PROTOCOL_HYBRID"
+	case PROTOCOL_HYBRID_EX:
+		serverChooseProtocol = "PROTOCOL_HYBRID_EX"
+	}
+	glog.Info("Server choose protocol:", serverChooseProtocol)
+
+	//if x.selectedProtocol == PROTOCOL_HYBRID_EX {
+	//	glog.Error("NODE_RDP_PROTOCOL_HYBRID_EX_NOT_SUPPORTED")
+	//	return
+	//}
+
+	if x.selectedProtocol == PROTOCOL_HYBRID_EX {
+		glog.Info("*** NLA Security selected ***")
+		err := x.transport.(*tpkt.TPKT).StartNLA()
+		glog.Debug("nla end, err?:", err)
+		if err != nil {
+			x.transport.Emit("close")
+			glog.Error("start NLA failed:", err)
+			return
+		}
+		x.Emit("connect", uint32(x.selectedProtocol))
+		return
+	}
+
+	x.transport.On("data", x.recvData)
+
+	if x.selectedProtocol == PROTOCOL_RDP {
+		glog.Info("*** RDP security selected ***")
+		x.Emit("connect", x.selectedProtocol)
+		return
+	}
+
+	if x.selectedProtocol == PROTOCOL_SSL {
+		glog.Info("*** SSL security selected ***")
+		err := x.transport.(*tpkt.TPKT).StartTLS()
+		if err != nil {
+			glog.Error("start tls failed:", err)
+			return
+		}
+		x.Emit("connect", x.selectedProtocol)
+		return
+	}
+
+	if x.selectedProtocol == PROTOCOL_HYBRID {
+		glog.Info("*** NLA Security selected ***")
+		err := x.transport.(*tpkt.TPKT).StartNLA()
+		glog.Debug("nla end, err?:", err)
+		if err != nil {
+			// 检查是否是NLA仅验证模式的成功返回
+			if err == tpkt.ErrNLAAuthSuccess {
+				glog.Info("NLA auth-only mode: credentials verified successfully")
+				x.Emit("error", err) // 通过 error 事件传播成功信号
+				return
+			}
+			glog.Error("start NLA failed:", err)
+			x.Emit("error", err)
+			return
+		}
+		x.Emit("connect", x.selectedProtocol)
+		return
+	}
+}
+
+func (x *X224) recvData(s []byte) {
+	glog.Trace("x224 recvData", hex.EncodeToString(s), "emit data")
+	// x224 header takes 3 bytes
+	x.Emit("data", s[3:])
+}