# SECUREAUTH LABS. Copyright 2018 SecureAuth Corporation. All rights reserved.
#
# This software is provided under under a slightly modified version
# of the Apache Software License. See the accompanying LICENSE file
# for more information.
#
# Author: Alberto Solino (@agsolino)
#
# Description:
#   SMB 2 and 3 Protocol Structures and constants [MS-SMB2]
#

from impacket.structure import Structure

# Constants

# SMB Packet
SMB2_PACKET_SIZE     = 64

# SMB Commands
SMB2_NEGOTIATE       = 0x0000 #
SMB2_SESSION_SETUP   = 0x0001 #
SMB2_LOGOFF          = 0x0002 #
SMB2_TREE_CONNECT    = 0x0003 #
SMB2_TREE_DISCONNECT = 0x0004 #
SMB2_CREATE          = 0x0005 #
SMB2_CLOSE           = 0x0006 #
SMB2_FLUSH           = 0x0007 #
SMB2_READ            = 0x0008 #
SMB2_WRITE           = 0x0009 #
SMB2_LOCK            = 0x000A #
SMB2_IOCTL           = 0x000B #
SMB2_CANCEL          = 0x000C #
SMB2_ECHO            = 0x000D #
SMB2_QUERY_DIRECTORY = 0x000E #
SMB2_CHANGE_NOTIFY   = 0x000F
SMB2_QUERY_INFO      = 0x0010 #
SMB2_SET_INFO        = 0x0011
SMB2_OPLOCK_BREAK    = 0x0012

# SMB Flags
SMB2_FLAGS_SERVER_TO_REDIR    = 0x00000001
SMB2_FLAGS_ASYNC_COMMAND      = 0x00000002
SMB2_FLAGS_RELATED_OPERATIONS = 0x00000004
SMB2_FLAGS_SIGNED             = 0x00000008
SMB2_FLAGS_DFS_OPERATIONS     = 0x10000000
SMB2_FLAGS_REPLAY_OPERATION   = 0x80000000

# SMB Error SymLink Flags
SYMLINK_FLAG_ABSOLUTE         = 0x0
SYMLINK_FLAG_RELATIVE         = 0x1

# SMB2_NEGOTIATE
# Security Modes
SMB2_NEGOTIATE_SIGNING_ENABLED  = 0x1
SMB2_NEGOTIATE_SIGNING_REQUIRED = 0x2

# Capabilities
SMB2_GLOBAL_CAP_DFS                = 0x01
SMB2_GLOBAL_CAP_LEASING            = 0x02
SMB2_GLOBAL_CAP_LARGE_MTU          = 0x04
SMB2_GLOBAL_CAP_MULTI_CHANNEL      = 0x08
SMB2_GLOBAL_CAP_PERSISTENT_HANDLES = 0x10
SMB2_GLOBAL_CAP_DIRECTORY_LEASING  = 0x20
SMB2_GLOBAL_CAP_ENCRYPTION         = 0x40

# Dialects
SMB2_DIALECT_002      = 0x0202 
SMB2_DIALECT_21       = 0x0210 
SMB2_DIALECT_30       = 0x0300 
SMB2_DIALECT_302      = 0x0302  #SMB 3.0.2
SMB2_DIALECT_311      = 0x0311  #SMB 3.1.1
SMB2_DIALECT_WILDCARD = 0x02FF 

# SMB2_SESSION_SETUP
# Flags
SMB2_SESSION_FLAG_BINDING        = 0x01
SMB2_SESSION_FLAG_IS_GUEST       = 0x01
SMB2_SESSION_FLAG_IS_NULL        = 0x02
SMB2_SESSION_FLAG_ENCRYPT_DATA   = 0x04

# SMB2_TREE_CONNECT 
# Types
SMB2_SHARE_TYPE_DISK   = 0x1
SMB2_SHARE_TYPE_PIPE   = 0x2
SMB2_SHARE_TYPE_PRINT  = 0x3

# Share Flags
SMB2_SHAREFLAG_MANUAL_CACHING              = 0x00000000
SMB2_SHAREFLAG_AUTO_CACHING                = 0x00000010
SMB2_SHAREFLAG_VDO_CACHING                 = 0x00000020
SMB2_SHAREFLAG_NO_CACHING                  = 0x00000030
SMB2_SHAREFLAG_DFS                         = 0x00000001
SMB2_SHAREFLAG_DFS_ROOT                    = 0x00000002
SMB2_SHAREFLAG_RESTRICT_EXCLUSIVE_OPENS    = 0x00000100
SMB2_SHAREFLAG_FORCE_SHARED_DELETE         = 0x00000200
SMB2_SHAREFLAG_ALLOW_NAMESPACE_CACHING     = 0x00000400
SMB2_SHAREFLAG_ACCESS_BASED_DIRECTORY_ENUM = 0x00000800
SMB2_SHAREFLAG_FORCE_LEVELII_OPLOCK        = 0x00001000
SMB2_SHAREFLAG_ENABLE_HASH_V1              = 0x00002000
SMB2_SHAREFLAG_ENABLE_HASH_V2              = 0x00004000
SMB2_SHAREFLAG_ENCRYPT_DATA                = 0x00008000

# Capabilities
SMB2_SHARE_CAP_DFS                         = 0x00000008
SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY     = 0x00000010
SMB2_SHARE_CAP_SCALEOUT                    = 0x00000020
SMB2_SHARE_CAP_CLUSTER                     = 0x00000040

# SMB_CREATE 
# Oplocks
SMB2_OPLOCK_LEVEL_NONE       = 0x00
SMB2_OPLOCK_LEVEL_II         = 0x01
SMB2_OPLOCK_LEVEL_EXCLUSIVE  = 0x08
SMB2_OPLOCK_LEVEL_BATCH      = 0x09
SMB2_OPLOCK_LEVEL_LEASE      = 0xFF

# Impersonation Level
SMB2_IL_ANONYMOUS       = 0x00000000
SMB2_IL_IDENTIFICATION  = 0x00000001
SMB2_IL_IMPERSONATION   = 0x00000002
SMB2_IL_DELEGATE        = 0x00000003

# File Attributes
FILE_ATTRIBUTE_ARCHIVE             = 0x00000020
FILE_ATTRIBUTE_COMPRESSED          = 0x00000800
FILE_ATTRIBUTE_DIRECTORY           = 0x00000010
FILE_ATTRIBUTE_ENCRYPTED           = 0x00004000
FILE_ATTRIBUTE_HIDDEN              = 0x00000002
FILE_ATTRIBUTE_NORMAL              = 0x00000080
FILE_ATTRIBUTE_NOT_CONTENT_INDEXED = 0x00002000
FILE_ATTRIBUTE_OFFLINE             = 0x00001000
FILE_ATTRIBUTE_READONLY            = 0x00000001
FILE_ATTRIBUTE_REPARSE_POINT       = 0x00000400
FILE_ATTRIBUTE_SPARSE_FILE         = 0x00000200
FILE_ATTRIBUTE_SYSTEM              = 0x00000004
FILE_ATTRIBUTE_TEMPORARY           = 0x00000100
FILE_ATTRIBUTE_INTEGRITY_STREAM    = 0x00000800
FILE_ATTRIBUTE_NO_SCRUB_DATA       = 0x00020000

# Share Access
FILE_SHARE_READ         = 0x00000001
FILE_SHARE_WRITE        = 0x00000002
FILE_SHARE_DELETE       = 0x00000004

# Create Disposition
FILE_SUPERSEDE          = 0x00000000 
FILE_OPEN               = 0x00000001
FILE_CREATE             = 0x00000002
FILE_OPEN_IF            = 0x00000003
FILE_OVERWRITE          = 0x00000004
FILE_OVERWRITE_IF       = 0x00000005

# Create Options
FILE_DIRECTORY_FILE            = 0x00000001
FILE_WRITE_THROUGH             = 0x00000002
FILE_SEQUENTIAL_ONLY           = 0x00000004
FILE_NO_INTERMEDIATE_BUFFERING = 0x00000008
FILE_SYNCHRONOUS_IO_ALERT      = 0x00000010
FILE_SYNCHRONOUS_IO_NONALERT   = 0x00000020
FILE_NON_DIRECTORY_FILE        = 0x00000040
FILE_COMPLETE_IF_OPLOCKED      = 0x00000100
FILE_NO_EA_KNOWLEDGE           = 0x00000200
FILE_RANDOM_ACCESS             = 0x00000800
FILE_DELETE_ON_CLOSE           = 0x00001000
FILE_OPEN_BY_FILE_ID           = 0x00002000
FILE_OPEN_FOR_BACKUP_INTENT    = 0x00004000
FILE_NO_COMPRESSION            = 0x00008000
FILE_RESERVE_OPFILTER          = 0x00100000
FILE_OPEN_REPARSE_POINT        = 0x00200000 
FILE_OPEN_NO_RECALL            = 0x00400000
FILE_OPEN_FOR_FREE_SPACE_QUERY = 0x00800000

# File Access Mask / Desired Access
FILE_READ_DATA         = 0x00000001
FILE_WRITE_DATA        = 0x00000002
FILE_APPEND_DATA       = 0x00000004
FILE_READ_EA           = 0x00000008
FILE_WRITE_EA          = 0x00000010
FILE_EXECUTE           = 0x00000020
FILE_READ_ATTRIBUTES   = 0x00000080
FILE_WRITE_ATTRIBUTES  = 0x00000100
DELETE                 = 0x00010000
READ_CONTROL           = 0x00020000
WRITE_DAC              = 0x00040000
WRITE_OWNER            = 0x00080000
SYNCHRONIZE            = 0x00100000
ACCESS_SYSTEM_SECURITY = 0x01000000
MAXIMUM_ALLOWED        = 0x02000000
GENERIC_ALL            = 0x10000000
GENERIC_EXECUTE        = 0x20000000
GENERIC_WRITE          = 0x40000000
GENERIC_READ           = 0x80000000

# Directory Access Mask 
FILE_LIST_DIRECTORY    = 0x00000001
FILE_ADD_FILE          = 0x00000002
FILE_ADD_SUBDIRECTORY  = 0x00000004
FILE_TRAVERSE          = 0x00000020
FILE_DELETE_CHILD      = 0x00000040

# Create Contexts
SMB2_CREATE_EA_BUFFER                     = 0x45787441 
SMB2_CREATE_SD_BUFFER                     = 0x53656344
SMB2_CREATE_DURABLE_HANDLE_REQUEST        = 0x44486e51 
SMB2_CREATE_DURABLE_HANDLE_RECONNECT      = 0x44486e43 
SMB2_CREATE_ALLOCATION_SIZE               = 0x416c5369 
SMB2_CREATE_QUERY_MAXIMAL_ACCESS_REQUEST  = 0x4d784163 
SMB2_CREATE_TIMEWARP_TOKEN                = 0x54577270 
SMB2_CREATE_QUERY_ON_DISK_ID              = 0x51466964 
SMB2_CREATE_REQUEST                       = 0x52714c73 
SMB2_CREATE_REQUEST_LEASE_V2              = 0x52714c73 
SMB2_CREATE_DURABLE_HANDLE_REQUEST_V2     = 0x44483251 
SMB2_CREATE_DURABLE_HANDLE_RECONNECT_V2   = 0x44483243 
SMB2_CREATE_APP_INSTANCE_ID               = 0x45BCA66AEFA7F74A9008FA462E144D74 

# Flags
SMB2_CREATE_FLAG_REPARSEPOINT  = 0x1
FILE_NEED_EA                   = 0x80

# CreateAction
FILE_SUPERSEDED    = 0x00000000
FILE_OPENED        = 0x00000001
FILE_CREATED       = 0x00000002
FILE_OVERWRITTEN   = 0x00000003

# SMB2_CREATE_REQUEST_LEASE states
SMB2_LEASE_NONE            = 0x00
SMB2_LEASE_READ_CACHING    = 0x01
SMB2_LEASE_HANDLE_CACHING  = 0x02
SMB2_LEASE_WRITE_CACHING   = 0x04

# SMB2_CREATE_REQUEST_LEASE_V2 Flags
SMB2_LEASE_FLAG_PARENT_LEASE_KEY_SET = 0x4

# SMB2_CREATE_DURABLE_HANDLE_REQUEST_V2 Flags
SMB2_DHANDLE_FLAG_PERSISTENT = 0x02
 
# SMB2_CLOSE
# Flags
SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB  = 0x0001

# SMB2_READ
# Channel
SMB2_CHANNEL_NONE     = 0x00
SMB2_CHANNEL_RDMA_V1  = 0x01

# SMB2_WRITE
# Flags
SMB2_WRITEFLAG_WRITE_THROUGH = 0x01

# Lease Break Notification
SMB2_NOTIFY_BREAK_LEASE_FLAG_ACK_REQUIRED  = 0x01

# SMB_LOCK
# Flags
SMB2_LOCKFLAG_SHARED_LOCK       = 0x01
SMB2_LOCKFLAG_EXCLUSIVE_LOCK    = 0x02
SMB2_LOCKFLAG_UNLOCK            = 0x04
SMB2_LOCKFLAG_FAIL_IMMEDIATELY  = 0x10

# SMB IOCTL
# Control Codes
FSCTL_DFS_GET_REFERRALS              = 0x00060194
FSCTL_PIPE_PEEK                      = 0x0011400C
FSCTL_PIPE_WAIT                      = 0x00110018
FSCTL_PIPE_TRANSCEIVE                = 0x0011C017
FSCTL_SRV_COPYCHUNK                  = 0x001440F2
FSCTL_SRV_ENUMERATE_SNAPSHOTS        = 0x00144064
FSCTL_SRV_REQUEST_RESUME_KEY         = 0x00140078
FSCTL_SRV_READ_HASH                  = 0x001441bb
FSCTL_SRV_COPYCHUNK_WRITE            = 0x001480F2
FSCTL_LMR_REQUEST_RESILIENCY         = 0x001401D4
FSCTL_QUERY_NETWORK_INTERFACE_INFO   = 0x001401FC
FSCTL_SET_REPARSE_POINT              = 0x000900A4
FSCTL_DELETE_REPARSE_POINT           = 0x000900AC
FSCTL_DFS_GET_REFERRALS_EX           = 0x000601B0
FSCTL_FILE_LEVEL_TRIM                = 0x00098208
FSCTL_VALIDATE_NEGOTIATE_INFO        = 0x00140204

# Flags
SMB2_0_IOCTL_IS_FSCTL  = 0x1

# SRV_READ_HASH
# Type
SRV_HASH_TYPE_PEER_DIST  = 0x01

# Version
SRV_HASH_VER_1  = 0x1
SRV_HASH_VER_2  = 0x2

# Retrieval Type
SRV_HASH_RETRIEVE_HASH_BASED  = 0x01
SRV_HASH_RETRIEVE_FILE_BASED  = 0x02

# NETWORK_INTERFACE_INFO
# Capabilities
RSS_CAPABLE  = 0x01
RDMA_CAPABLE = 0x02

# SMB2_QUERY_DIRECTORIES
# Information Class 
FILE_DIRECTORY_INFORMATION         = 0x01
FILE_FULL_DIRECTORY_INFORMATION    = 0x02
FILEID_FULL_DIRECTORY_INFORMATION  = 0x26
FILE_BOTH_DIRECTORY_INFORMATION    = 0x03
FILEID_BOTH_DIRECTORY_INFORMATION  = 0x25
FILENAMES_INFORMATION              = 0x0C

# Flags
SMB2_RESTART_SCANS        = 0x01
SMB2_RETURN_SINGLE_ENTRY  = 0x02
SMB2_INDEX_SPECIFIED      = 0x04
SMB2_REOPEN               = 0x10

# SMB2_CHANGE_NOTIFY
# Flags
SMB2_WATCH_TREE  = 0x01

# Filters
FILE_NOTIFY_CHANGE_FILE_NAME     = 0x00000001
FILE_NOTIFY_CHANGE_DIR_NAME      = 0x00000002
FILE_NOTIFY_CHANGE_ATTRIBUTES    = 0x00000004
FILE_NOTIFY_CHANGE_SIZE          = 0x00000008
FILE_NOTIFY_CHANGE_LAST_WRITE    = 0x00000010
FILE_NOTIFY_CHANGE_LAST_ACCESS   = 0x00000020
FILE_NOTIFY_CHANGE_CREATION      = 0x00000040
FILE_NOTIFY_CHANGE_EA            = 0x00000080
FILE_NOTIFY_CHANGE_SECURITY      = 0x00000100
FILE_NOTIFY_CHANGE_STREAM_NAME   = 0x00000200
FILE_NOTIFY_CHANGE_STREAM_SIZE   = 0x00000400
FILE_NOTIFY_CHANGE_STREAM_WRITE  = 0x00000800

# FILE_NOTIFY_INFORMATION
# Actions
FILE_ACTION_ADDED            = 0x00000001
FILE_ACTION_REMOVED          = 0x00000002
FILE_ACTION_MODIFIED         = 0x00000003
FILE_ACTION_RENAMED_OLD_NAME = 0x00000004 
FILE_ACTION_RENAMED_NEW_NAME = 0x00000005

# SMB2_QUERY_INFO
# InfoTypes
SMB2_0_INFO_FILE        = 0x01
SMB2_0_INFO_FILESYSTEM  = 0x02
SMB2_0_INFO_SECURITY    = 0x03
SMB2_0_INFO_QUOTA       = 0x04

# File Information Classes
SMB2_SEC_INFO_00                      = 0
SMB2_FILE_ACCESS_INFO                 = 8
SMB2_FILE_ALIGNMENT_INFO              = 17
SMB2_FILE_ALL_INFO                    = 18
SMB2_FILE_ALLOCATION_INFO             = 19
SMB2_FILE_ALTERNATE_NAME_INFO         = 21
SMB2_ATTRIBUTE_TAG_INFO               = 35
SMB2_FILE_BASIC_INFO                  = 4
SMB2_FILE_BOTH_DIRECTORY_INFO         = 3
SMB2_FILE_COMPRESSION_INFO            = 28
SMB2_FILE_DIRECTORY_INFO              = 1
SMB2_FILE_DISPOSITION_INFO            = 13
SMB2_FILE_EA_INFO                     = 7
SMB2_FILE_END_OF_FILE_INFO            = 20
SMB2_FULL_DIRECTORY_INFO              = 2
SMB2_FULL_EA_INFO                     = 15
SMB2_FILE_HARDLINK_INFO               = 46
SMB2_FILE_ID_BOTH_DIRECTORY_INFO      = 37
SMB2_FILE_ID_FULL_DIRECTORY_INFO      = 38
SMB2_FILE_ID_GLOBAL_TX_DIRECTORY_INFO = 50
SMB2_FILE_INTERNAL_INFO               = 6
SMB2_FILE_LINK_INFO                   = 11
SMB2_FILE_MAILSLOT_QUERY_INFO         = 26
SMB2_FILE_MAILSLOT_SET_INFO           = 27
SMB2_FILE_MODE_INFO                   = 16
SMB2_FILE_MOVE_CLUSTER_INFO           = 31
SMB2_FILE_NAME_INFO                   = 9
SMB2_FILE_NAMES_INFO                  = 12
SMB2_FILE_NETWORK_OPEN_INFO           = 34
SMB2_FILE_NORMALIZED_NAME_INFO        = 48
SMB2_FILE_OBJECT_ID_INFO              = 29
SMB2_FILE_PIPE_INFO                   = 23
SMB2_FILE_PIPE_LOCAL_INFO             = 24
SMB2_FILE_PIPE_REMOTE_INFO            = 25
SMB2_FILE_POSITION_INFO               = 14
SMB2_FILE_QUOTA_INFO                  = 32
SMB2_FILE_RENAME_INFO                 = 10
SMB2_FILE_REPARSE_POINT_INFO          = 33
SMB2_FILE_SFIO_RESERVE_INFO           = 44
SMB2_FILE_SHORT_NAME_INFO             = 45
SMB2_FILE_STANDARD_INFO               = 5
SMB2_FILE_STANDARD_LINK_INFO          = 54
SMB2_FILE_STREAM_INFO                 = 22
SMB2_FILE_TRACKING_INFO               = 36
SMB2_FILE_VALID_DATA_LENGTH_INFO      = 39

# File System Information Classes
SMB2_FILESYSTEM_VOLUME_INFO           = 1
SMB2_FILESYSTEM_LABEL_INFO            = 2
SMB2_FILESYSTEM_SIZE_INFO             = 3
SMB2_FILESYSTEM_DEVICE_INFO           = 4
SMB2_FILESYSTEM_ATTRIBUTE_INFO        = 5
SMB2_FILESYSTEM_CONTROL_INFO          = 6
SMB2_FILESYSTEM_FULL_SIZE_INFO        = 7
SMB2_FILESYSTEM_OBJECT_ID_INFO        = 8
SMB2_FILESYSTEM_DRIVER_PATH_INFO      = 9
SMB2_FILESYSTEM_SECTOR_SIZE_INFO      = 11

# Additional information
OWNER_SECURITY_INFORMATION  = 0x00000001
GROUP_SECURITY_INFORMATION  = 0x00000002
DACL_SECURITY_INFORMATION   = 0x00000004
SACL_SECURITY_INFORMATION   = 0x00000008
LABEL_SECURITY_INFORMATION  = 0x00000010

# Flags
SL_RESTART_SCAN         = 0x00000001
SL_RETURN_SINGLE_ENTRY  = 0x00000002
SL_INDEX_SPECIFIED      = 0x00000004

# TRANSFORM_HEADER
SMB2_ENCRYPTION_AES128_CCM = 0x0001
SMB2_ENCRYPTION_AES128_GCM = 0x0002


# STRUCtures
# Represents a SMB2/3 Packet
class SMBPacketBase(Structure):
    def addCommand(self,command):
        # Pad to 8 bytes and put the offset of another SMBPacket
        raise Exception('Implement This!')

    def isValidAnswer(self, status):
        if self['Status'] != status:
            import smb3
            raise smb3.SessionError(self['Status'], self)
        return True

    def __init__(self, data = None):
        Structure.__init__(self,data)
        if data is None:
            self['TreeID'] = 0


class SMB2PacketAsync(SMBPacketBase):
    structure = (
        ('ProtocolID','"\xfeSMB'),
        ('StructureSize','<H=64'),
        ('CreditCharge','<H=0'),
        ('Status','<L=0'),
        ('Command','<H=0'),
        ('CreditRequestResponse','<H=0'),
        ('Flags','<L=0'),
        ('NextCommand','<L=0'),
        ('MessageID','<Q=0'),
        ('AsyncID','<Q=0'),
        ('SessionID','<Q=0'),
        ('Signature','16s=""'),
        ('Data',':=""'),
    )

class SMB3PacketAsync(SMBPacketBase):
    structure = (
        ('ProtocolID','"\xfeSMB'),
        ('StructureSize','<H=64'),
        ('CreditCharge','<H=0'),
        ('ChannelSequence','<H=0'),
        ('Reserved','<H=0'),
        ('Command','<H=0'),
        ('CreditRequestResponse','<H=0'),
        ('Flags','<L=0'),
        ('NextCommand','<L=0'),
        ('MessageID','<Q=0'),
        ('AsyncID','<Q=0'),
        ('SessionID','<Q=0'),
        ('Signature','16s=""'),
        ('Data',':=""'),
    )

class SMB2Packet(SMBPacketBase):
    structure = (
        ('ProtocolID','"\xfeSMB'),
        ('StructureSize','<H=64'),
        ('CreditCharge','<H=0'),
        ('Status','<L=0'),
        ('Command','<H=0'),
        ('CreditRequestResponse','<H=0'),
        ('Flags','<L=0'),
        ('NextCommand','<L=0'),
        ('MessageID','<Q=0'),
        ('Reserved','<L=0'),
        ('TreeID','<L=0'),
        ('SessionID','<Q=0'),
        ('Signature','16s=""'),
        ('Data',':=""'),
    )

class SMB3Packet(SMBPacketBase):
    structure = (
        ('ProtocolID','"\xfeSMB'),
        ('StructureSize','<H=64'),
        ('CreditCharge','<H=0'),
        ('ChannelSequence','<H=0'),
        ('Reserved','<H=0'),
        ('Command','<H=0'),
        ('CreditRequestResponse','<H=0'),
        ('Flags','<L=0'),
        ('NextCommand','<L=0'),
        ('MessageID','<Q=0'),
        ('Reserved','<L=0'),
        ('TreeID','<L=0'),
        ('SessionID','<Q=0'),
        ('Signature','16s=""'),
        ('Data',':=""'),
    )

class SMB2Error(Structure):
    structure = (
        ('StructureSize','<H=9'),
        ('Reserved','<H=0'),
        ('ByteCount','<L=0'),
        ('_ErrorData','_-ErrorData','self["ByteCount"]'),
        ('ErrorData','"\xff'),
    )

class SMB2ErrorSymbolicLink(Structure):
    structure = (
        ('SymLinkLength','<L=0'),
        ('SymLinkErrorTag','<L=0'),
        ('ReparseTag','<L=0'),
        ('ReparseDataLenght','<H=0'),
        ('UnparsedPathLength','<H=0'),
        ('SubstituteNameOffset','<H=0'),
        ('SubstituteNameLength','<H=0'),
        ('PrintNameOffset','<H=0'),
        ('PrintNameLength','<H=0'),
        ('Flags','<L=0'),
        ('PathBuffer',':'),
    )

# SMB2_NEGOTIATE
class SMB2Negotiate(Structure):
    structure = (
        ('StructureSize','<H=36'),
        ('DialectCount','<H=0'),
        ('SecurityMode','<H=0'),
        ('Reserved','<H=0'),
        ('Capabilities','<L=0'),
        ('ClientGuid','16s=""'),
        ('ClientStartTime','<Q=0'),
        ('Dialects','*<H'),
    )

class SMB2Negotiate_Response(Structure):
    structure = (
        ('StructureSize','<H=65'),
        ('SecurityMode','<H=0'),
        ('DialectRevision','<H=0'),
        ('Reserved','<H=0'),
        ('ServerGuid','16s=""'),
        ('Capabilities','<L=0'),
        ('MaxTransactSize','<L=0'),
        ('MaxReadSize','<L=0'),
        ('MaxWriteSize','<L=0'),
        ('SystemTime','<Q=0'),
        ('ServerStartTime','<Q=0'),
        ('SecurityBufferOffset','<H=0'),
        ('SecurityBufferLength','<H=0'),
        ('Reserved2','<L=0'),
        ('_AlignPad','_-AlignPad','self["SecurityBufferOffset"] - (64 + self["StructureSize"] - 1)'),
        ('AlignPad',':=""'),
        ('_Buffer','_-Buffer','self["SecurityBufferLength"]'),
        ('Buffer',':'),
    )

# SMB2_SESSION_SETUP 
class SMB2SessionSetup(Structure):
    SIZE = 24
    structure = (
        ('StructureSize','<H=25'),
        ('Flags','<B=0'),
        ('SecurityMode','<B=0'),
        ('Capabilities','<L=0'),
        ('Channel','<L=0'),
        ('SecurityBufferOffset','<H=(self.SIZE + 64 + len(self["AlignPad"]))'),
        ('SecurityBufferLength','<H=0'),
        ('PreviousSessionId','<Q=0'),
        ('_AlignPad','_-AlignPad','self["SecurityBufferOffset"] - (64 + self["StructureSize"] - 1)'),
        ('AlignPad',':=""'),
        ('_Buffer','_-Buffer','self["SecurityBufferLength"]'),
        ('Buffer',':'),
    )

    def __init__(self, data = None):
        Structure.__init__(self,data)
        if data is None:
            self['AlignPad'] = ''

    def getData(self):
        #self['AlignPad'] = '\x00' * ((8 - ((24 + SMB2_PACKET_SIZE) & 7)) & 7)
        #self['SecurityBufferOffset'] = 24 + SMB2_PACKET_SIZE +len(self['AlignPad']) 
        #self['SecurityBufferLength'] += len(self['AlignPad'])
        return Structure.getData(self)
        

class SMB2SessionSetup_Response(Structure):
    structure = (
        ('StructureSize','<H=9'),
        ('SessionFlags','<H=0'),
        ('SecurityBufferOffset','<H=0'),
        ('SecurityBufferLength','<H=0'),
        ('_AlignPad','_-AlignPad','self["SecurityBufferOffset"] - (64 + self["StructureSize"] - 1)'),
        ('AlignPad',':=""'),
        ('_Buffer','_-Buffer','self["SecurityBufferLength"]'),
        ('Buffer',':'),
    )

# SMB2_LOGOFF
class SMB2Logoff(Structure):
    structure = (
        ('StructureSize','<H=4'),
        ('Reserved','<H=0'),
    ) 


class SMB2Logoff_Response(Structure):
    structure = (
        ('StructureSize','<H=4'),
        ('Reserved','<H=0'),
    )

# SMB2_TREE_CONNECT
class SMB2TreeConnect(Structure):
    SIZE = 8
    structure = (
        ('StructureSize','<H=9'),
        ('Reserved','<H=0'),
        ('PathOffset','<H=(self.SIZE + 64 + len(self["AlignPad"]))'),
        ('PathLength','<H=0'),
        ('_AlignPad','_-AlignPad','self["PathOffset"] - (64 + self.SIZE - 1)'),
        ('AlignPad',':=""'),
        ('_Buffer','_-Buffer','self["PathLength"]'),
        ('Buffer',':'),
    )
    def __init__(self, data = None):
        Structure.__init__(self,data)
        if data is None:
            self['AlignPad'] = ''

class SMB2TreeConnect_Response(Structure):
    structure = (
        ('StructureSize','<H=16'),
        ('ShareType','<B=0'),
        ('Reserved','<B=0'),
        ('ShareFlags','<L=0'),
        ('Capabilities','<L=0'),
        ('MaximalAccess','<L=0'),
    )

# SMB2_TREE_DISCONNECT
class SMB2TreeDisconnect(Structure):
    structure = (
        ('StructureSize','<H=4'),
        ('Reserved','<H=0'),
    )

class SMB2TreeDisconnect_Response(Structure):
    structure = (
        ('StructureSize','<H=4'),
        ('Reserved','<H=0'),
    )

# SMB2_CREATE
class SMB2Create(Structure):
    SIZE = 56
    structure = (
        ('StructureSize','<H=57'),
        ('SecurityFlags','<B=0'),
        ('RequestedOplockLevel','<B=0'),
        ('ImpersonationLevel','<L=0'),
        ('SmbCreateFlags','<Q=0'),
        ('Reserved','<Q=0'),
        ('DesiredAccess','<L=0'),
        ('FileAttributes','<L=0'),
        ('ShareAccess','<L=0'),
        ('CreateDisposition','<L=0'),
        ('CreateOptions','<L=0'),
        ('NameOffset','<H=(self.SIZE + 64 + len(self["AlignPad"]))'),
        ('NameLength','<H=0'),
        ('CreateContextsOffset','<L=0'),
        ('CreateContextsLength','<L=0'),
        ('_AlignPad','_-AlignPad','self["NameOffset"] - (64 + self["StructureSize"] - 1)'),
        ('AlignPad',':=""'),
        ('_Buffer','_-Buffer','self["CreateContextsLength"]+self["NameLength"]'),
        ('Buffer',':'),
    )
    def __init__(self, data = None):
        Structure.__init__(self,data)
        if data is None:
            self['AlignPad'] = ''

class SMB2CreateContext(Structure):
     structure = (
         ('Next','<L=0'),
         ('NameOffset','<H=0'),
         ('NameLength','<H=0'),
         ('Reserved','<H=0'),
         ('DataOffset','<H=0'),
         ('DataLength','<L=0'),
         ('_Buffer','_-Buffer','self["DataLength"]+self["NameLength"]'),
         ('Buffer',':'),
     )

class SMB2_FILEID(Structure):
    structure = (
        ('Persistent','<Q=0'),
        ('Volatile','<Q=0'),
    )

class SMB2Create_Response(Structure):
    structure = (
        ('StructureSize','<H=89'),
        ('OplockLevel','<B=0'),
        ('Flags','<B=0'),
        ('CreateAction','<L=0'),
        ('CreationTime','<Q=0'),
        ('LastAccessTime','<Q=0'),
        ('LastWriteTime','<Q=0'),
        ('ChangeTime','<Q=0'),
        ('AllocationSize','<Q=0'),
        ('EndOfFile','<Q=0'),
        ('FileAttributes','<L=0'),
        ('Reserved2','<L=0'),
        ('FileID',':',SMB2_FILEID),
        ('CreateContextsOffset','<L=0'),
        ('CreateContextsLength','<L=0'),
        ('_AlignPad','_-AlignPad','self["CreateContextsOffset"] - (64 + self["StructureSize"] - 1)'),
        ('AlignPad',':=""'),
        ('_Buffer','_-Buffer','self["CreateContextsLength"]'),
        ('Buffer',':'),
    )

class FILE_FULL_EA_INFORMATION(Structure):
    structure = (
        ('NextEntryOffset','<L=0'),
        ('Flags','<B=0'),
        ('EaNameLength','<B=0'),
        ('EaValueLength','<H=0'),
        ('_EaName','_-EaName','self["EaNameLength"]'),
        ('EaName',':'),
        ('_EaValue','_-EaValue','self["EaValue"]'),
        ('EaValue',':'),
    )


class SMB2_CREATE_DURABLE_HANDLE_RECONNECT(Structure):
    structure = (
        ('Data',':',SMB2_FILEID),
    )

class SMB2_CREATE_DURABLE_HANDLE_REQUEST(Structure):
    structure = (
        ('DurableRequest','16s=""'),
    )

class SMB2_CREATE_DURABLE_HANDLE_RESPONSE(Structure):
    structure = (
        ('Reserved','<Q=0'),
    )

class SMB2_CREATE_QUERY_MAXIMAL_ACCESS_REQUEST(Structure):
    structure = (
        ('Timestamp','<Q=0'),
    )

class SMB2_CREATE_QUERY_MAXIMAL_ACCESS_RESPONSE(Structure):
    structure = (
        ('QueryStatus','<L=0'),
        ('MaximalAccess','<L=0'),
    )

class SMB2_CREATE_ALLOCATION_SIZE(Structure):
    structure = (
        ('AllocationSize','<Q=0'),
    )

class SMB2_CREATE_TIMEWARP_TOKEN(Structure):
    structure = (
        ('AllocationSize','<Q=0'),
    )

class SMB2_CREATE_REQUEST_LEASE(Structure):
    structure = (
        ('LeaseKey','16s=""'),
        ('LeaseState','<L=0'),
        ('LeaseFlags','<L=0'),
        ('LeaseDuration','<Q=0'),
    )

SMB2_CREATE_RESPONSE_LEASE = SMB2_CREATE_REQUEST_LEASE

class SMB2_CREATE_REQUEST_LEASE_V2(Structure):
    structure = (
        ('LeaseKey','16s=""'),
        ('LeaseState','<L=0'),
        ('Flags','<L=0'),
        ('LeaseDuration','<Q=0'),
        ('ParentLeaseKey','16s=""'),
        ('Epoch','<H=0'),
        ('Reserved','<H=0'),
    )

SMB2_CREATE_RESPONSE_LEASE_V2 = SMB2_CREATE_REQUEST_LEASE_V2

class SMB2_CREATE_DURABLE_HANDLE_REQUEST_V2(Structure):
    structure = (
        ('Timeout','<L=0'),
        ('Flags','<L=0'),
        ('Reserved','8s=""'),
        ('CreateGuid','16s=""'),
    )

class SMB2_CREATE_DURABLE_HANDLE_RESPONSE_V2(Structure):
    structure = (
        ('Timeout','<L=0'),
        ('Flags','<L=0'),
    )

class SMB2_CREATE_DURABLE_HANDLE_RECONNECT_V2(Structure):
    structure = (
        ('FileID',':', SMB2_FILEID),
        ('CreateGuid','16s=""'),
        ('Flags','<L=0'),
    )

class SMB2_CREATE_APP_INSTANCE_ID(Structure):
    structure = (
        ('StructureSize','<H=0'),
        ('Reserved','<H=0'),
        ('AppInstanceId','16s=""'),
    )

class SMB2_CREATE_QUERY_ON_DISK_ID(Structure):
    structure = (
        ('DiskIDBuffer','32s=""'),
    )

# Todo: Add Classes for
#SMB2_CREATE_SD_BUFFER                    

# SMB2_CLOSE
class SMB2Close(Structure):
    structure = (
        ('StructureSize','<H=24'),
        ('Flags','<H=0'),
        ('Reserved','<L=0'),
        ('FileID',':', SMB2_FILEID),
    )

class SMB2Close_Response(Structure):
    structure = (
        ('StructureSize','<H=60'),
        ('Flags','<H=0'),
        ('Reserved','<L=0'),
        ('CreationTime','<Q=0'),
        ('LastAccessTime','<Q=0'),
        ('LastWriteTime','<Q=0'),
        ('ChangeTime','<Q=0'),
        ('AllocationSize','<Q=0'),
        ('EndofFile','<Q=0'),
        ('FileAttributes','<L=0'),
    )

# SMB2_FLUSH
class SMB2Flush(Structure):
    structure = (
        ('StructureSize','<H=24'),
        ('Reserved1','<H=0'),
        ('Reserved2','<L=0'),
        ('FileID',':',SMB2_FILEID),
    )

class SMB2Flush_Response(Structure):
    structure = (
        ('StructureSize','<H=4'),
        ('Reserved','<H=0'),
    )

# SMB2_READ
class SMB2Read(Structure):
    SIZE = 48
    structure = (
        ('StructureSize','<H=49'),
        ('Padding','<B=0'),
        ('Reserved','<B=0'),
        ('Length','<L=0'),
        ('Offset','<Q=0'),
        ('FileID',':',SMB2_FILEID),
        ('MinimumCount','<L=0'),
        ('Channel','<L=0'),
        ('RemainingBytes','<L=0'),
        ('ReadChannelInfoOffset','<H=0'),
        ('ReadChannelInfoLength','<H=0'),
        ('_AlignPad','_-AlignPad','self["ReadChannelInfoOffset"] - (64 + self["StructureSize"] - 1)'),
        ('AlignPad',':=""'),
        ('_Buffer','_-Buffer','self["ReadChannelInfoLength"]'),
        ('Buffer',':=0'),
    )
    def __init__(self, data = None):
        Structure.__init__(self,data)
        if data is None:
            self['AlignPad'] = ''


class SMB2Read_Response(Structure):
    structure = (
        ('StructureSize','<H=17'),
        ('DataOffset','<B=0'),
        ('Reserved','<B=0'),
        ('DataLength','<L=0'),
        ('DataRemaining','<L=0'),
        ('Reserved2','<L=0'),
        ('_AlignPad','_-AlignPad','self["DataOffset"] - (64 + self["StructureSize"] - 1)'),
        ('AlignPad',':=""'),
        ('_Buffer','_-Buffer','self["DataLength"]'),
        ('Buffer',':'),
    )

# SMB2_WRITE
class SMB2Write(Structure):
    SIZE = 48
    structure = (
        ('StructureSize','<H=49'),
        ('DataOffset','<H=(self.SIZE + 64 + len(self["AlignPad"]))'),
        ('Length','<L=0'),
        ('Offset','<Q=0'),
        ('FileID',':',SMB2_FILEID),
        ('Channel','<L=0'),
        ('RemainingBytes','<L=0'),
        ('WriteChannelInfoOffset','<H=0'),
        ('WriteChannelInfoLength','<H=0'),
        ('_AlignPad','_-AlignPad','self["DataOffset"] + self["WriteChannelInfoOffset"] - (64 + self["StructureSize"] - 1)'),
        ('AlignPad',':=""'),
        ('Flags','<L=0'),
        ('_Buffer','_-Buffer','self["Length"]+self["WriteChannelInfoLength"]'),
        ('Buffer',':'),
    )
    def __init__(self, data = None):
        Structure.__init__(self,data)
        if data is None:
            self['AlignPad'] = ''


class SMB2Write_Response(Structure):
    structure = (
        ('StructureSize','<H=17'),
        ('Reserved','<H=0'),
        ('Count','<L=0'),
        ('Remaining','<L=0'),
        ('WriteChannelInfoOffset','<H=0'),
        ('WriteChannelInfoLength','<H=0'),
    )

class SMB2OplockBreakNotification(Structure):
    structure = (
        ('StructureSize','<H=24'),
        ('OplockLevel','<B=0'),
        ('Reserved','<B=0'),
        ('Reserved2','<L=0'),
        ('FileID',':',SMB2_FILEID),
    )

SMB2OplockBreakAcknowledgment = SMB2OplockBreakNotification
SMB2OplockBreakResponse       = SMB2OplockBreakNotification

class SMB2LeaseBreakNotification(Structure):
    structure = (
        ('StructureSize','<H=44'),
        ('NewEpoch','<H=0'),
        ('Flags','<L=0'),
        ('LeaseKey','16s=""'),
        ('CurrentLeaseState','<L=0'),
        ('NewLeaseState','<L=0'),
        ('BreakReason','<L=0'),
        ('AccessMaskHint','<L=0'),
        ('ShareMaskHint','<L=0'),
    )

class SMB2LeaseBreakAcknowledgement(Structure):
    structure = (
        ('StructureSize','<H=36'),
        ('Reserved','<H=0'),
        ('Flags','<L=0'),
        ('LeaseKey','16s=""'),
        ('LeaseState','<L=0'),
        ('LeaseDuration','<Q=0'),
    )

SMB2LeaseBreakResponse = SMB2LeaseBreakAcknowledgement

# SMB2_LOCK
class SMB2_LOCK_ELEMENT(Structure):
    structure = (
        ('Offset','<Q=0'),
        ('Length','<Q=0'),
        ('Flags','<L=0'),
        ('Reserved','<L=0'),
    )

class SMB2Lock(Structure):
    structure = (
        ('StructureSize','<H=48'),
        ('LockCount','<H=0'),
        ('LockSequence','<L=0'),
        ('FileID',':',SMB2_FILEID),
        ('_Locks','_-Locks','self["LockCount"]*24'),
        ('Locks',':'),
    )

class SMB2Lock_Response(Structure):
    structure = (
        ('StructureSize','<H=4'),
        ('Reserved','<H=0'),
    )


# SMB2_ECHO
class SMB2Echo(Structure):
    structure = (
        ('StructureSize','<H=4'),
        ('Reserved','<H=0'),
    )

SMB2Echo_Response = SMB2Echo

# SMB2_CANCEL`
class SMB2Cancel(Structure):
    structure = (
        ('StructureSize','<H=4'),
        ('Reserved','<H=0'),
    )

# SMB2_IOCTL
class SMB2Ioctl(Structure):
    SIZE = 56
    structure = (
        ('StructureSize','<H=57'),
        ('Reserved','<H=0'),
        ('CtlCode','<L=0'),
        ('FileID',':',SMB2_FILEID),
        ('InputOffset','<L=(self.SIZE + 64 + len(self["AlignPad"]))'),
        ('InputCount','<L=0'),
        ('MaxInputResponse','<L=0'),
        ('OutputOffset','<L=(self.SIZE + 64 + len(self["AlignPad"]) + self["InputCount"])'),
        ('OutputCount','<L=0'),
        ('MaxOutputResponse','<L=0'),
        ('Flags','<L=0'),
        ('Reserved2','<L=0'),
        #('_AlignPad','_-AlignPad','self["InputOffset"] + self["OutputOffset"] - (64 + self["StructureSize"] - 1)'),
        #('AlignPad',':=""'),
        ('_Buffer','_-Buffer','self["InputCount"]+self["OutputCount"]'),
        ('Buffer',':'),
    )
    def __init__(self, data = None):
        Structure.__init__(self,data)
        if data is None:
            self['AlignPad'] = ''

class FSCTL_PIPE_WAIT_STRUCTURE(Structure):
    structure = (
        ('Timeout','<q=0'),
        ('NameLength','<L=0'),
        ('TimeoutSpecified','<B=0'),
        ('Padding','<B=0'),
        ('_Name','_-Name','self["NameLength"]'),
        ('Name',':'),
    )

class SRV_COPYCHUNK_COPY(Structure):
    structure = (
        ('SourceKey','24s=""'),
        ('ChunkCount','<L=0'),
        ('Reserved','<L=0'),
        ('_Chunks','_-Chunks', 'self["ChunkCount"]*len(SRV_COPYCHUNK)'),
        ('Chunks',':'),
    )

class SRV_COPYCHUNK(Structure):
    structure = (
        ('SourceOffset','<Q=0'),
        ('TargetOffset','<Q=0'),
        ('Length','<L=0'),
        ('Reserved','<L=0'),
    )

class SRV_COPYCHUNK_RESPONSE(Structure):
    structure = (
        ('ChunksWritten','<L=0'),
        ('ChunkBytesWritten','<L=0'),
        ('TotalBytesWritten','<L=0'),
    )

class SRV_READ_HASH(Structure):
    structure = (
        ('HashType','<L=0'),
        ('HashVersion','<L=0'),
        ('HashRetrievalType','<L=0'),
        ('Length','<L=0'),
        ('Offset','<Q=0'),
    )

class NETWORK_RESILIENCY_REQUEST(Structure):
    structure = (
        ('Timeout','<L=0'),
        ('Reserved','<L=0'),
    ) 

class VALIDATE_NEGOTIATE_INFO(Structure):
    structure = (
        ('Capabilities','<L=0'),
        ('Guid','16s=""'),
        ('SecurityMode','<H=0'),
        #('DialectCount','<H=0'),
        ('Dialects','<H*<H'),
    )

class VALIDATE_NEGOTIATE_INFO_RESPONSE(Structure):
    structure = (
        ('Capabilities','<L=0'),
        ('Guid','16s=""'),
        ('SecurityMode','<H=0'),
        ('Dialect','<H'),
    )

class SRV_SNAPSHOT_ARRAY(Structure):
    structure = (
        ('NumberOfSnapShots','<L=0'),
        ('NumberOfSnapShotsReturned','<L=0'),
        ('SnapShotArraySize','<L=0'),
        ('_SnapShots','_-SnapShots','self["SnapShotArraySize"]'),
        ('SnapShots',':'),
    )

class SRV_REQUEST_RESUME_KEY(Structure):
    structure = (
        ('ResumeKey','24s=""'),
        ('ContextLength','<L=0'),
        ('_Context','_-Context','self["ContextLength"]'),
        ('Context',':'),
    )

class HASH_HEADER(Structure):
    structure = (
        ('HashType','<L=0'),
        ('HashVersion','<L=0'),
        ('SourceFileChangeTime','<Q=0'),
        ('SourceFileSize','<Q=0'),
        ('HashBlobLength','<L=0'),
        ('HashBlobOffset','<L=0'),
        ('Dirty','<H=0'),
        ('SourceFileNameLength','<L=0'),
        ('_SourceFileName','_-SourceFileName','self["SourceFileNameLength"]',),
        ('SourceFileName',':'),
    )

class SRV_HASH_RETRIEVE_HASH_BASED(Structure):
    structure = (
        ('Offset','<Q=0'),
        ('BufferLength','<L=0'),
        ('Reserved','<L=0'),
        ('_Buffer','_-Buffer','self["BufferLength"]'),
        ('Buffer',':'),
    )

class SRV_HASH_RETRIEVE_FILE_BASED(Structure):
    structure = (
        ('FileDataOffset','<Q=0'),
        ('FileDataLength','<Q=0'),
        ('BufferLength','<L=0'),
        ('Reserved','<L=0'),
        ('_Buffer','_-Buffer','self["BufferLength"]'),
        ('Buffer',':'),
    )

class NETWORK_INTERFACE_INFO(Structure):
    structure = (
        ('Next','<L=0'),
        ('IfIndex','<L=0'),
        ('Capability','<L=0'),
        ('Reserved','<L=0'),
        ('LinkSpeed','<Q=0'),
        ('SockAddr_Storage','128s=""'),
    )

class MOUNT_POINT_REPARSE_DATA_STRUCTURE(Structure):
    structure = (
        ("ReparseTag", "<L=0xA0000003"),
        ("ReparseDataLen", "<H=len(self['PathBuffer']) + 8"),
        ("Reserved", "<H=0"),
        ("SubstituteNameOffset", "<H=0"),
        ("SubstituteNameLength", "<H=0"),
        ("PrintNameOffset", "<H=0"),
        ("PrintNameLength", "<H=0"),
        ("PathBuffer", ":")
    )

class MOUNT_POINT_REPARSE_GUID_DATA_STRUCTURE(Structure):
    structure = (
        ("ReparseTag", "<L=0xA0000003"),
        ("ReparseDataLen", "<H=len(self['DataBuffer'])"),
        ("Reserved", "<H=0"),
        ("ReparseGuid", "16s=''"),
        ("DataBuffer", ":")
    )

class SMB2Ioctl_Response(Structure):
    structure = (
        ('StructureSize','<H=49'),
        ('Reserved','<H=0'),
        ('CtlCode','<L=0'),
        ('FileID',':',SMB2_FILEID),
        ('InputOffset','<L=0'),
        ('InputCount','<L=0'),
        ('OutputOffset','<L=0'),
        ('OutputCount','<L=0'),
        ('Flags','<L=0'),
        ('Reserved2','<L=0'),
        ('_AlignPad','_-AlignPad','self["OutputOffset"] - (64 + self["StructureSize"] - 1)'),
        ('AlignPad',':=""'),
        ('_Buffer','_-Buffer','self["InputCount"]+self["OutputCount"]'),
        ('Buffer',':'),
    )

# SMB2_QUERY_DIRECTORY
class SMB2QueryDirectory(Structure):
    SIZE = 32
    structure = (
        ('StructureSize','<H=33'),
        ('FileInformationClass','<B=0'),
        ('Flags','<B=0'),
        ('FileIndex','<L=0'),
        ('FileID',':',SMB2_FILEID),
        ('FileNameOffset','<H=(self.SIZE + 64 + len(self["AlignPad"]))'),
        ('FileNameLength','<H=0'),
        ('OutputBufferLength','<L=0'),
        ('_AlignPad','_-AlignPad','self["FileNameOffset"] - (64 + self["StructureSize"] - 1)'),
        ('AlignPad',':=""'),
        ('_Buffer','_-Buffer','self["FileNameLength"]'),
        ('Buffer',':'),
    )
    def __init__(self, data = None):
        Structure.__init__(self,data)
        if data is None:
            self['AlignPad'] = ''

class SMB2QueryDirectory_Response(Structure):
    structure = (
        ('StructureSize','<H=9'),
        ('OutputBufferOffset','<H=0'),
        ('OutputBufferLength','<L=0'),
        ('_AlignPad','_-AlignPad','self["OutputBufferOffset"] - (64 + self["StructureSize"] - 1)'),
        ('AlignPad',':=""'),
        ('_Buffer','_-Buffer','self["OutputBufferLength"]'),
        ('Buffer',':'),
    )

# SMB2_CHANGE_NOTIFY
class SMB2ChangeNotify(Structure):
    structure = (
        ('StructureSize','<H=32'),
        ('Flags','<H=0'),
        ('OutputBufferLength','<L=0'),
        ('FileID',':',SMB2_FILEID),
        ('CompletionFilter','<L=0'),
        ('Reserved','<L=0'),
    )

class SMB2ChangeNotify_Response(Structure):
    structure = (
        ('StructureSize','<H=9'),
        ('OutputBufferOffset','<H=0'),
        ('OutputBufferLength','<L=0'),
        ('_AlignPad','_-AlignPad','self["OutputBufferOffset"] - (64 + self["StructureSize"] - 1)'),
        ('AlignPad',':=""'),
        ('_Buffer','_-Buffer','self["OutputBufferLength"]'),
        ('Buffer',':'),
    )

class FILE_NOTIFY_INFORMATION(Structure):
    structure = (
        ('NextEntryOffset','<L=0'),
        ('Action','<L=0'),
        ('FileNameLength','<L=0'),
        ('_FileName','_-FileName','self["FileNameLength"]',),
        ('FileName',':'),
    )

# SMB2_QUERY_INFO
class SMB2QueryInfo(Structure):
    SIZE = 40
    structure = (
       ('StructureSize','<H=41'),
       ('InfoType','<B=0'),
       ('FileInfoClass','<B=0'),
       ('OutputBufferLength','<L=0'),
       ('InputBufferOffset','<H=(self.SIZE + 64 + len(self["AlignPad"]))'),
       ('Reserved','<H=0'),
       ('InputBufferLength','<L=0'),
       ('AdditionalInformation','<L=0'),
       ('Flags','<L=0'),
       ('FileID',':',SMB2_FILEID),
       ('_AlignPad','_-AlignPad','self["InputBufferOffset"] - (64 + self["StructureSize"] - 1)'),
       ('AlignPad',':=""'),
       ('_Buffer','_-Buffer','self["InputBufferLength"]'),
       ('Buffer',':'),
    )
    def __init__(self, data = None):
        Structure.__init__(self,data)
        if data is None:
            self['AlignPad'] = ''


class SMB2_QUERY_QUOTA_INFO(Structure):
    structure = (
        ('ReturnSingle','<B=0'),
        ('RestartScan','<B=0'),
        ('Reserved','<H=0'),
        ('SidListLength','<L=0'),
        ('StartSidLength','<L=0'),
        ('StartSidOffset','<L=0'),
        # ToDo: Check 2.2.37.1 here
        ('SidBuffer',':'),
    )

class SMB2QueryInfo_Response(Structure):
   structure = (
       ('StructureSize','<H=9'),
       ('OutputBufferOffset','<H=0'),
       ('OutputBufferLength','<L=0'),
       ('_AlignPad','_-AlignPad','self["OutputBufferOffset"] - (64 + self["StructureSize"] - 1)'),
       ('AlignPad',':=""'),
       ('_Buffer','_-Buffer','self["OutputBufferLength"]'),
       ('Buffer',':'),
   )

# SMB2_SET_INFO
class SMB2SetInfo(Structure):
    SIZE = 32
    structure = (
       ('StructureSize','<H=33'),
       ('InfoType','<B=0'),
       ('FileInfoClass','<B=0'),
       ('BufferLength','<L=0'),
       ('BufferOffset','<H=(self.SIZE + 64 + len(self["AlignPad"]))'),
       ('Reserved','<H=0'),
       ('AdditionalInformation','<L=0'),
       ('FileID',':',SMB2_FILEID),
       ('_AlignPad','_-AlignPad','self["BufferOffset"] - (64 + self["StructureSize"] - 1)'),
       ('AlignPad',':=""'),
       ('_Buffer','_-Buffer','self["BufferLength"]'),
       ('Buffer',':'),
    )
    def __init__(self, data = None):
        Structure.__init__(self,data)
        if data is None:
            self['AlignPad'] = ''

class SMB2SetInfo_Response(Structure):
    structure = (
       ('StructureSize','<H=2'),
    )

class FILE_RENAME_INFORMATION_TYPE_2(Structure):
    structure = (
        ('ReplaceIfExists','<B=0'),
        ('Reserved','7s=""'),
        ('RootDirectory','<Q=0'),
        ('FileNameLength','<L=0'),
        ('_FileName','_-FileName','self["FileNameLength"]'),
        ('FileName',':'),
    )

class SMB2_TRANSFORM_HEADER(Structure):
    structure = (
        ('ProtocolID','"\xfdSMB'),
        ('Signature','16s=""'),
        ('Nonce','16s=""'),
        ('OriginalMessageSize','<L=0'),
        ('Reserved','<H=0'),
        ('EncryptionAlgorithm','<H=0'),
        ('SessionID','<Q=0'),
    )

# SMB2_FILE_INTERNAL_INFO
class FileInternalInformation(Structure):
    structure = (
        ('IndexNumber','<q=0'),
    )

# SMB2_SEC_INFO_00       
class FileSecInformation(Structure):
    structure = (
        ('Revision','<h=1'),
        ('Type','<h=0'),
        ('OffsetToOwner','<I=0'),
        ('OffsetToGroup','<I=0'),
        ('OffsetToSACL','<I=0'),
        ('OffsetToDACL','<I=0'),
    )
