# 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:
#   [MS-DRSR] Directory Replication Service (DRS) DRSUAPI Interface implementation
#
#   Best way to learn how to use these calls is to grab the protocol standard
#   so you understand what the call does, and then read the test case located
#   at https://github.com/SecureAuthCorp/impacket/tree/master/tests/SMB_RPC
#
#   Some calls have helper functions, which makes it even easier to use.
#   They are located at the end of this file. 
#   Helper functions start with "h"<name of the call>.
#   There are test cases for them too. 
#
from __future__ import division
from __future__ import print_function
from builtins import bytes
import hashlib
from struct import pack
import six
from six import PY2

from impacket import LOG
from impacket.dcerpc.v5.ndr import NDRCALL, NDRSTRUCT, NDRPOINTER, NDRUniConformantArray, NDRUNION, NDR, NDRENUM
from impacket.dcerpc.v5.dtypes import PUUID, DWORD, NULL, GUID, LPWSTR, BOOL, ULONG, UUID, LONGLONG, ULARGE_INTEGER, LARGE_INTEGER
from impacket import hresult_errors, system_errors
from impacket.structure import Structure
from impacket.uuid import uuidtup_to_bin, string_to_bin
from impacket.dcerpc.v5.enum import Enum
from impacket.dcerpc.v5.rpcrt import DCERPCException
from impacket.krb5 import crypto
from pyasn1.type import univ
from pyasn1.codec.ber import decoder
from impacket.crypto import transformKey

try:
    from Cryptodome.Cipher import ARC4, DES
except Exception:
    LOG.critical("Warning: You don't have any crypto installed. You need pycryptodomex")
    LOG.critical("See https://pypi.org/project/pycryptodomex/")

MSRPC_UUID_DRSUAPI = uuidtup_to_bin(('E3514235-4B06-11D1-AB04-00C04FC2DCD2','4.0'))

class DCERPCSessionError(DCERPCException):
    def __init__(self, error_string=None, error_code=None, packet=None):
        DCERPCException.__init__(self, error_string, error_code, packet)

    def __str__( self ):
        key = self.error_code
        if key in hresult_errors.ERROR_MESSAGES:
            error_msg_short = hresult_errors.ERROR_MESSAGES[key][0]
            error_msg_verbose = hresult_errors.ERROR_MESSAGES[key][1]
            return 'DRSR SessionError: code: 0x%x - %s - %s' % (self.error_code, error_msg_short, error_msg_verbose)
        elif key & 0xffff in system_errors.ERROR_MESSAGES:
            error_msg_short = system_errors.ERROR_MESSAGES[key & 0xffff][0]
            error_msg_verbose = system_errors.ERROR_MESSAGES[key & 0xffff][1]
            return 'DRSR SessionError: code: 0x%x - %s - %s' % (self.error_code, error_msg_short, error_msg_verbose)
        else:
            return 'DRSR SessionError: unknown error code: 0x%x' % self.error_code

################################################################################
# CONSTANTS
################################################################################
# 4.1.10.2.17 EXOP_ERR Codes
class EXOP_ERR(NDRENUM):
    align = 4
    align64 = 4
    structure = (
        ('Data', '<L'),
    )
    class enumItems(Enum):
        EXOP_ERR_SUCCESS               = 0x00000001
        EXOP_ERR_UNKNOWN_OP            = 0x00000002
        EXOP_ERR_FSMO_NOT_OWNER        = 0x00000003
        EXOP_ERR_UPDATE_ERR            = 0x00000004
        EXOP_ERR_EXCEPTION             = 0x00000005
        EXOP_ERR_UNKNOWN_CALLER        = 0x00000006
        EXOP_ERR_RID_ALLOC             = 0x00000007
        EXOP_ERR_FSMO_OWNER_DELETED    = 0x00000008
        EXOP_ERR_FSMO_PENDING_OP       = 0x00000009
        EXOP_ERR_MISMATCH              = 0x0000000A
        EXOP_ERR_COULDNT_CONTACT       = 0x0000000B
        EXOP_ERR_FSMO_REFUSING_ROLES   = 0x0000000C
        EXOP_ERR_DIR_ERROR             = 0x0000000D
        EXOP_ERR_FSMO_MISSING_SETTINGS = 0x0000000E
        EXOP_ERR_ACCESS_DENIED         = 0x0000000F
        EXOP_ERR_PARAM_ERROR           = 0x00000010

    def dump(self, msg = None, indent = 0):
        if msg is None:
            msg = self.__class__.__name__
        if msg != '':
            print(msg, end=' ')

        try:
            print(" %s" % self.enumItems(self.fields['Data']).name, end=' ')
        except ValueError:
            print(" %d" % self.fields['Data'])

# 4.1.10.2.18 EXOP_REQ Codes
EXOP_FSMO_REQ_ROLE = 0x00000001
EXOP_FSMO_REQ_RID_ALLOC = 0x00000002
EXOP_FSMO_RID_REQ_ROLE = 0x00000003
EXOP_FSMO_REQ_PDC = 0x00000004
EXOP_FSMO_ABANDON_ROLE = 0x00000005
EXOP_REPL_OBJ = 0x00000006
EXOP_REPL_SECRETS = 0x00000007

# 5.14 ATTRTYP
ATTRTYP = ULONG

# 5.51 DSTIME
DSTIME = LONGLONG

# 5.39 DRS_EXTENSIONS_INT
DRS_EXT_BASE = 0x00000001
DRS_EXT_ASYNCREPL = 0x00000002
DRS_EXT_REMOVEAPI = 0x00000004
DRS_EXT_MOVEREQ_V2 = 0x00000008
DRS_EXT_GETCHG_DEFLATE = 0x00000010
DRS_EXT_DCINFO_V1 = 0x00000020
DRS_EXT_RESTORE_USN_OPTIMIZATION = 0x00000040
DRS_EXT_ADDENTRY = 0x00000080
DRS_EXT_KCC_EXECUTE = 0x00000100
DRS_EXT_ADDENTRY_V2 = 0x00000200
DRS_EXT_LINKED_VALUE_REPLICATION = 0x00000400
DRS_EXT_DCINFO_V2 = 0x00000800
DRS_EXT_INSTANCE_TYPE_NOT_REQ_ON_MOD = 0x00001000
DRS_EXT_CRYPTO_BIND = 0x00002000
DRS_EXT_GET_REPL_INFO = 0x00004000
DRS_EXT_STRONG_ENCRYPTION = 0x00008000
DRS_EXT_DCINFO_VFFFFFFFF = 0x00010000
DRS_EXT_TRANSITIVE_MEMBERSHIP = 0x00020000
DRS_EXT_ADD_SID_HISTORY = 0x00040000
DRS_EXT_POST_BETA3 = 0x00080000
DRS_EXT_GETCHGREQ_V5 = 0x00100000
DRS_EXT_GETMEMBERSHIPS2 = 0x00200000
DRS_EXT_GETCHGREQ_V6 = 0x00400000
DRS_EXT_NONDOMAIN_NCS = 0x00800000
DRS_EXT_GETCHGREQ_V8 = 0x01000000
DRS_EXT_GETCHGREPLY_V5 = 0x02000000
DRS_EXT_GETCHGREPLY_V6 = 0x04000000
DRS_EXT_GETCHGREPLY_V9 = 0x00000100
DRS_EXT_WHISTLER_BETA3 = 0x08000000
DRS_EXT_W2K3_DEFLATE = 0x10000000
DRS_EXT_GETCHGREQ_V10 = 0x20000000
DRS_EXT_RESERVED_FOR_WIN2K_OR_DOTNET_PART2 = 0x40000000
DRS_EXT_RESERVED_FOR_WIN2K_OR_DOTNET_PART3 = 0x80000000

# dwFlagsExt
DRS_EXT_ADAM = 0x00000001
DRS_EXT_LH_BETA2 = 0x00000002
DRS_EXT_RECYCLE_BIN = 0x00000004

# 5.41 DRS_OPTIONS
DRS_ASYNC_OP = 0x00000001
DRS_GETCHG_CHECK = 0x00000002
DRS_UPDATE_NOTIFICATION = 0x00000002
DRS_ADD_REF = 0x00000004
DRS_SYNC_ALL = 0x00000008
DRS_DEL_REF = 0x00000008
DRS_WRIT_REP = 0x00000010
DRS_INIT_SYNC = 0x00000020
DRS_PER_SYNC = 0x00000040
DRS_MAIL_REP = 0x00000080
DRS_ASYNC_REP = 0x00000100
DRS_IGNORE_ERROR = 0x00000100
DRS_TWOWAY_SYNC = 0x00000200
DRS_CRITICAL_ONLY = 0x00000400
DRS_GET_ANC = 0x00000800
DRS_GET_NC_SIZE = 0x00001000
DRS_LOCAL_ONLY = 0x00001000
DRS_NONGC_RO_REP = 0x00002000
DRS_SYNC_BYNAME = 0x00004000
DRS_REF_OK = 0x00004000
DRS_FULL_SYNC_NOW = 0x00008000
DRS_NO_SOURCE = 0x00008000
DRS_FULL_SYNC_IN_PROGRESS = 0x00010000
DRS_FULL_SYNC_PACKET = 0x00020000
DRS_SYNC_REQUEUE = 0x00040000
DRS_SYNC_URGENT = 0x00080000
DRS_REF_GCSPN = 0x00100000
DRS_NO_DISCARD = 0x00100000
DRS_NEVER_SYNCED = 0x00200000
DRS_SPECIAL_SECRET_PROCESSING = 0x00400000
DRS_INIT_SYNC_NOW = 0x00800000
DRS_PREEMPTED = 0x01000000
DRS_SYNC_FORCED = 0x02000000
DRS_DISABLE_AUTO_SYNC = 0x04000000
DRS_DISABLE_PERIODIC_SYNC = 0x08000000
DRS_USE_COMPRESSION = 0x10000000
DRS_NEVER_NOTIFY = 0x20000000
DRS_SYNC_PAS = 0x40000000
DRS_GET_ALL_GROUP_MEMBERSHIP = 0x80000000


# 5.113 LDAP_CONN_PROPERTIES
BND = 0x00000001
SSL = 0x00000002
UDP = 0x00000004
GC = 0x00000008
GSS = 0x00000010
NGO = 0x00000020
SPL = 0x00000040
MD5 = 0x00000080
SGN = 0x00000100
SL = 0x00000200

# 5.137 NTSAPI_CLIENT_GUID
NTDSAPI_CLIENT_GUID = string_to_bin('e24d201a-4fd6-11d1-a3da-0000f875ae0d')

# 5.139 NULLGUID
NULLGUID = string_to_bin('00000000-0000-0000-0000-000000000000')

# 5.205 USN
USN = LONGLONG

# 4.1.4.1.2 DRS_MSG_CRACKREQ_V1
DS_NAME_FLAG_GCVERIFY = 0x00000004
DS_NAME_FLAG_TRUST_REFERRAL = 0x00000008
DS_NAME_FLAG_PRIVATE_RESOLVE_FPOS = 0x80000000

DS_LIST_SITES = 0xFFFFFFFF
DS_LIST_SERVERS_IN_SITE = 0xFFFFFFFE
DS_LIST_DOMAINS_IN_SITE = 0xFFFFFFFD
DS_LIST_SERVERS_FOR_DOMAIN_IN_SITE = 0xFFFFFFFC
DS_LIST_INFO_FOR_SERVER = 0xFFFFFFFB
DS_LIST_ROLES = 0xFFFFFFFA
DS_NT4_ACCOUNT_NAME_SANS_DOMAIN = 0xFFFFFFF9
DS_MAP_SCHEMA_GUID = 0xFFFFFFF8
DS_LIST_DOMAINS = 0xFFFFFFF7
DS_LIST_NCS = 0xFFFFFFF6
DS_ALT_SECURITY_IDENTITIES_NAME = 0xFFFFFFF5
DS_STRING_SID_NAME = 0xFFFFFFF4
DS_LIST_SERVERS_WITH_DCS_IN_SITE = 0xFFFFFFF3
DS_LIST_GLOBAL_CATALOG_SERVERS = 0xFFFFFFF1
DS_NT4_ACCOUNT_NAME_SANS_DOMAIN_EX = 0xFFFFFFF0
DS_USER_PRINCIPAL_NAME_AND_ALTSECID = 0xFFFFFFEF

DS_USER_PRINCIPAL_NAME_FOR_LOGON = 0xFFFFFFF2

# 5.53 ENTINF
ENTINF_FROM_MASTER = 0x00000001
ENTINF_DYNAMIC_OBJECT = 0x00000002
ENTINF_REMOTE_MODIFY = 0x00010000

# 4.1.27.1.2 DRS_MSG_VERIFYREQ_V1
DRS_VERIFY_DSNAMES = 0x00000000
DRS_VERIFY_SIDS = 0x00000001
DRS_VERIFY_SAM_ACCOUNT_NAMES = 0x00000002
DRS_VERIFY_FPOS = 0x00000003

# 4.1.11.1.2 DRS_MSG_NT4_CHGLOG_REQ_V1
DRS_NT4_CHGLOG_GET_CHANGE_LOG = 0x00000001
DRS_NT4_CHGLOG_GET_SERIAL_NUMBERS = 0x00000002

# 4.1.10.2.15 DRS_MSG_GETCHGREPLY_NATIVE_VERSION_NUMBER
DRS_MSG_GETCHGREPLY_NATIVE_VERSION_NUMBER = 9
################################################################################
# STRUCTURES
################################################################################
# 4.1.10.2.16 ENCRYPTED_PAYLOAD
class ENCRYPTED_PAYLOAD(Structure):
    structure = (
        ('Salt','16s'),
        ('CheckSum','<L'),
        ('EncryptedData',':'),
    )

# 5.136 NT4SID
class NT4SID(NDRSTRUCT):
    structure =  (
        ('Data','28s=b""'),
    )
    def getAlignment(self):
        return 4

# 5.40 DRS_HANDLE
class DRS_HANDLE(NDRSTRUCT):
    structure =  (
        ('Data','20s=b""'),
    )
    def getAlignment(self):
        return 4

class PDRS_HANDLE(NDRPOINTER):
    referent = (
        ('Data',DRS_HANDLE),
    )

# 5.38 DRS_EXTENSIONS
class BYTE_ARRAY(NDRUniConformantArray):
    item = 'c'

class PBYTE_ARRAY(NDRPOINTER):
    referent = (
        ('Data',BYTE_ARRAY),
    )

class DRS_EXTENSIONS(NDRSTRUCT):
    structure =  (
        ('cb',DWORD),
        ('rgb',BYTE_ARRAY),
    )

class PDRS_EXTENSIONS(NDRPOINTER):
    referent = (
        ('Data',DRS_EXTENSIONS),
    )

# 5.39 DRS_EXTENSIONS_INT
class DRS_EXTENSIONS_INT(Structure):
    structure =  (
        ('dwFlags','<L=0'),
        ('SiteObjGuid','16s=b""'),
        ('Pid','<L=0'),
        ('dwReplEpoch','<L=0'),
        ('dwFlagsExt','<L=0'),
        ('ConfigObjGUID','16s=b""'),
        ('dwExtCaps','<L=0'),
    )

# 4.1.5.1.2 DRS_MSG_DCINFOREQ_V1
class DRS_MSG_DCINFOREQ_V1(NDRSTRUCT):
    structure =  (
        ('Domain',LPWSTR),
        ('InfoLevel',DWORD),
    )

# 4.1.5.1.1 DRS_MSG_DCINFOREQ
class DRS_MSG_DCINFOREQ(NDRUNION):
    commonHdr = (
        ('tag', DWORD),
    )
    union = {
        1  : ('V1', DRS_MSG_DCINFOREQ_V1),
    }

# 4.1.5.1.8 DS_DOMAIN_CONTROLLER_INFO_1W
class DS_DOMAIN_CONTROLLER_INFO_1W(NDRSTRUCT):
    structure =  (
        ('NetbiosName',LPWSTR),
        ('DnsHostName',LPWSTR),
        ('SiteName',LPWSTR),
        ('ComputerObjectName',LPWSTR),
        ('ServerObjectName',LPWSTR),
        ('fIsPdc',BOOL),
        ('fDsEnabled',BOOL),
    )

class DS_DOMAIN_CONTROLLER_INFO_1W_ARRAY(NDRUniConformantArray):
    item = DS_DOMAIN_CONTROLLER_INFO_1W

class PDS_DOMAIN_CONTROLLER_INFO_1W_ARRAY(NDRPOINTER):
    referent = (
        ('Data',DS_DOMAIN_CONTROLLER_INFO_1W_ARRAY),
    )

# 4.1.5.1.4 DRS_MSG_DCINFOREPLY_V1
class DRS_MSG_DCINFOREPLY_V1(NDRSTRUCT):
    structure =  (
        ('cItems',DWORD),
        ('rItems',PDS_DOMAIN_CONTROLLER_INFO_1W_ARRAY),
    )

# 4.1.5.1.9 DS_DOMAIN_CONTROLLER_INFO_2W
class DS_DOMAIN_CONTROLLER_INFO_2W(NDRSTRUCT):
    structure =  (
        ('NetbiosName',LPWSTR),
        ('DnsHostName',LPWSTR),
        ('SiteName',LPWSTR),
        ('SiteObjectName',LPWSTR),
        ('ComputerObjectName',LPWSTR),
        ('ServerObjectName',LPWSTR),
        ('NtdsDsaObjectName',LPWSTR),
        ('fIsPdc',BOOL),
        ('fDsEnabled',BOOL),
        ('fIsGc',BOOL),
        ('SiteObjectGuid',GUID),
        ('ComputerObjectGuid',GUID),
        ('ServerObjectGuid',GUID),
        ('NtdsDsaObjectGuid',GUID),
    )

class DS_DOMAIN_CONTROLLER_INFO_2W_ARRAY(NDRUniConformantArray):
    item = DS_DOMAIN_CONTROLLER_INFO_2W

class PDS_DOMAIN_CONTROLLER_INFO_2W_ARRAY(NDRPOINTER):
    referent = (
        ('Data',DS_DOMAIN_CONTROLLER_INFO_2W_ARRAY),
    )

# 4.1.5.1.5 DRS_MSG_DCINFOREPLY_V2
class DRS_MSG_DCINFOREPLY_V2(NDRSTRUCT):
    structure =  (
        ('cItems',DWORD),
        ('rItems',PDS_DOMAIN_CONTROLLER_INFO_2W_ARRAY),
    )

# 4.1.5.1.10 DS_DOMAIN_CONTROLLER_INFO_3W
class DS_DOMAIN_CONTROLLER_INFO_3W(NDRSTRUCT):
    structure =  (
        ('NetbiosName',LPWSTR),
        ('DnsHostName',LPWSTR),
        ('SiteName',LPWSTR),
        ('SiteObjectName',LPWSTR),
        ('ComputerObjectName',LPWSTR),
        ('ServerObjectName',LPWSTR),
        ('NtdsDsaObjectName',LPWSTR),
        ('fIsPdc',BOOL),
        ('fDsEnabled',BOOL),
        ('fIsGc',BOOL),
        ('fIsRodc',BOOL),
        ('SiteObjectGuid',GUID),
        ('ComputerObjectGuid',GUID),
        ('ServerObjectGuid',GUID),
        ('NtdsDsaObjectGuid',GUID),
    )

class DS_DOMAIN_CONTROLLER_INFO_3W_ARRAY(NDRUniConformantArray):
    item = DS_DOMAIN_CONTROLLER_INFO_3W

class PDS_DOMAIN_CONTROLLER_INFO_3W_ARRAY(NDRPOINTER):
    referent = (
        ('Data',DS_DOMAIN_CONTROLLER_INFO_3W_ARRAY),
    )

# 4.1.5.1.6 DRS_MSG_DCINFOREPLY_V3
class DRS_MSG_DCINFOREPLY_V3(NDRSTRUCT):
    structure =  (
        ('cItems',DWORD),
        ('rItems',PDS_DOMAIN_CONTROLLER_INFO_3W_ARRAY),
    )

# 4.1.5.1.11 DS_DOMAIN_CONTROLLER_INFO_FFFFFFFFW
class DS_DOMAIN_CONTROLLER_INFO_FFFFFFFFW(NDRSTRUCT):
    structure =  (
        ('IPAddress',DWORD),
        ('NotificationCount',DWORD),
        ('secTimeConnected',DWORD),
        ('Flags',DWORD),
        ('TotalRequests',DWORD),
        ('Reserved1',DWORD),
        ('UserName',LPWSTR),
    )

class DS_DOMAIN_CONTROLLER_INFO_FFFFFFFFW_ARRAY(NDRUniConformantArray):
    item = DS_DOMAIN_CONTROLLER_INFO_FFFFFFFFW

class PDS_DOMAIN_CONTROLLER_INFO_FFFFFFFFW_ARRAY(NDRPOINTER):
    referent = (
        ('Data',DS_DOMAIN_CONTROLLER_INFO_FFFFFFFFW_ARRAY),
    )

# 4.1.5.1.7 DRS_MSG_DCINFOREPLY_VFFFFFFFF
class DRS_MSG_DCINFOREPLY_VFFFFFFFF(NDRSTRUCT):
    structure =  (
        ('cItems',DWORD),
        ('rItems',PDS_DOMAIN_CONTROLLER_INFO_FFFFFFFFW_ARRAY),
    )

# 4.1.5.1.3 DRS_MSG_DCINFOREPLY
class DRS_MSG_DCINFOREPLY(NDRUNION):
    commonHdr = (
        ('tag', DWORD),
    )
    union = {
        1  : ('V1', DRS_MSG_DCINFOREPLY_V1),
        2  : ('V2', DRS_MSG_DCINFOREPLY_V2),
        3  : ('V3', DRS_MSG_DCINFOREPLY_V3),
        0xffffffff  : ('V1', DRS_MSG_DCINFOREPLY_VFFFFFFFF),
    }

# 4.1.4.1.2 DRS_MSG_CRACKREQ_V1
class LPWSTR_ARRAY(NDRUniConformantArray):
    item = LPWSTR

class PLPWSTR_ARRAY(NDRPOINTER):
    referent = (
        ('Data',LPWSTR_ARRAY),
    )

class DRS_MSG_CRACKREQ_V1(NDRSTRUCT):
    structure =  (
        ('CodePage',ULONG),
        ('LocaleId',ULONG),
        ('dwFlags',DWORD),
        ('formatOffered',DWORD),
        ('formatDesired',DWORD),
        ('cNames',DWORD),
        ('rpNames',PLPWSTR_ARRAY),
    )

# 4.1.4.1.1 DRS_MSG_CRACKREQ
class DRS_MSG_CRACKREQ(NDRUNION):
    commonHdr = (
        ('tag', DWORD),
    )
    union = {
        1  : ('V1', DRS_MSG_CRACKREQ_V1),
    }

# 4.1.4.1.3 DS_NAME_FORMAT
class DS_NAME_FORMAT(NDRENUM):
    class enumItems(Enum):
        DS_UNKNOWN_NAME            = 0
        DS_FQDN_1779_NAME          = 1
        DS_NT4_ACCOUNT_NAME        = 2
        DS_DISPLAY_NAME            = 3
        DS_UNIQUE_ID_NAME          = 6
        DS_CANONICAL_NAME          = 7
        DS_USER_PRINCIPAL_NAME     = 8
        DS_CANONICAL_NAME_EX       = 9
        DS_SERVICE_PRINCIPAL_NAME  = 10
        DS_SID_OR_SID_HISTORY_NAME = 11
        DS_DNS_DOMAIN_NAME         = 12

# 4.1.4.1.4 DS_NAME_RESULT_ITEMW
class DS_NAME_RESULT_ITEMW(NDRSTRUCT):
    structure =  (
        ('status',DWORD),
        ('pDomain',LPWSTR),
        ('pName',LPWSTR),
    )

class DS_NAME_RESULT_ITEMW_ARRAY(NDRUniConformantArray):
    item = DS_NAME_RESULT_ITEMW

class PDS_NAME_RESULT_ITEMW_ARRAY(NDRPOINTER):
    referent = (
        ('Data',DS_NAME_RESULT_ITEMW_ARRAY),
    )

# 4.1.4.1.5 DS_NAME_RESULTW
class DS_NAME_RESULTW(NDRSTRUCT):
    structure =  (
        ('cItems',DWORD),
        ('rItems',PDS_NAME_RESULT_ITEMW_ARRAY),
    )

class PDS_NAME_RESULTW(NDRPOINTER):
    referent = (
        ('Data',DS_NAME_RESULTW),
    )

# 4.1.4.1.7 DRS_MSG_CRACKREPLY_V1
class DRS_MSG_CRACKREPLY_V1(NDRSTRUCT):
    structure =  (
        ('pResult',PDS_NAME_RESULTW),
    )

# 4.1.4.1.6 DRS_MSG_CRACKREPLY
class DRS_MSG_CRACKREPLY(NDRUNION):
    commonHdr = (
        ('tag', DWORD),
    )
    union = {
        1  : ('V1', DRS_MSG_CRACKREPLY_V1),
    }

# 5.198 UPTODATE_CURSOR_V1
class UPTODATE_CURSOR_V1(NDRSTRUCT):
    structure =  (
        ('uuidDsa',UUID),
        ('usnHighPropUpdate',USN),
    )

class UPTODATE_CURSOR_V1_ARRAY(NDRUniConformantArray):
    item = UPTODATE_CURSOR_V1

# 5.200 UPTODATE_VECTOR_V1_EXT
class UPTODATE_VECTOR_V1_EXT(NDRSTRUCT):
    structure =  (
        ('dwVersion',DWORD),
        ('dwReserved1',DWORD),
        ('cNumCursors',DWORD),
        ('dwReserved2',DWORD),
        ('rgCursors',UPTODATE_CURSOR_V1_ARRAY),
    )

class PUPTODATE_VECTOR_V1_EXT(NDRPOINTER):
    referent = (
        ('Data',UPTODATE_VECTOR_V1_EXT),
    )

# 5.206 USN_VECTOR
class USN_VECTOR(NDRSTRUCT):
    structure =  (
        ('usnHighObjUpdate',USN),
        ('usnReserved',USN),
        ('usnHighPropUpdate',USN),
    )

# 5.50 DSNAME
class WCHAR_ARRAY(NDRUniConformantArray):
    item  = 'H'

    def __setitem__(self, key, value):
        self.fields['MaximumCount'] = None
        self.data = None        # force recompute
        return NDRUniConformantArray.__setitem__(self, key, [ord(c) for c in value])

    def __getitem__(self, key):
        if key == 'Data':
            try:
                return ''.join([six.unichr(i) for i in self.fields[key]])
            except ValueError as e:
                LOG.debug("ValueError Exception", exc_info=True)
                LOG.error(str(e))
        else:
            return NDR.__getitem__(self,key)

class DSNAME(NDRSTRUCT):
    structure =  (
        ('structLen',ULONG),
        ('SidLen',ULONG),
        ('Guid',GUID),
        ('Sid',NT4SID),
        ('NameLen',ULONG),
        ('StringName', WCHAR_ARRAY),
    )
    def getDataLen(self, data, offset=0):
        return self['NameLen']
    def getData(self, soFar = 0):
        return NDRSTRUCT.getData(self, soFar)

class PDSNAME(NDRPOINTER):
    referent = (
        ('Data',DSNAME),
    )

class PDSNAME_ARRAY(NDRUniConformantArray):
    item = PDSNAME

class PPDSNAME_ARRAY(NDRPOINTER):
    referent = (
        ('Data',PDSNAME_ARRAY),
    )

class ATTRTYP_ARRAY(NDRUniConformantArray):
    item = ATTRTYP

# 5.145 PARTIAL_ATTR_VECTOR_V1_EXT
class PARTIAL_ATTR_VECTOR_V1_EXT(NDRSTRUCT):
    structure =  (
        ('dwVersion',DWORD),
        ('dwReserved1',DWORD),
        ('cAttrs',DWORD),
        ('rgPartialAttr',ATTRTYP_ARRAY),
    )

class PPARTIAL_ATTR_VECTOR_V1_EXT(NDRPOINTER):
    referent = (
        ('Data',PARTIAL_ATTR_VECTOR_V1_EXT),
    )

# 5.142 OID_t
class OID_t(NDRSTRUCT):
    structure =  (
        ('length',ULONG),
        ('elements',PBYTE_ARRAY),
    )

# 5.153 PrefixTableEntry
class PrefixTableEntry(NDRSTRUCT):
    structure =  (
        ('ndx',ULONG),
        ('prefix',OID_t),
    )

class PrefixTableEntry_ARRAY(NDRUniConformantArray):
    item = PrefixTableEntry

class PPrefixTableEntry_ARRAY(NDRPOINTER):
    referent = (
        ('Data',PrefixTableEntry_ARRAY),
    )

# 5.177 SCHEMA_PREFIX_TABLE
class SCHEMA_PREFIX_TABLE(NDRSTRUCT):
    structure =  (
        ('PrefixCount',DWORD),
        ('pPrefixEntry',PPrefixTableEntry_ARRAY),
    )

# 4.1.10.2.2 DRS_MSG_GETCHGREQ_V3
class DRS_MSG_GETCHGREQ_V3(NDRSTRUCT):
    structure =  (
        ('uuidDsaObjDest',UUID),
        ('uuidInvocIdSrc',UUID),
        ('pNC',PDSNAME),
        ('usnvecFrom',USN_VECTOR),
        ('pUpToDateVecDestV1',PUPTODATE_VECTOR_V1_EXT),
        ('pPartialAttrVecDestV1',PPARTIAL_ATTR_VECTOR_V1_EXT),
        ('PrefixTableDest',SCHEMA_PREFIX_TABLE),
        ('ulFlags',ULONG),
        ('cMaxObjects',ULONG),
        ('cMaxBytes',ULONG),
        ('ulExtendedOp',ULONG),
    )

# 5.131 MTX_ADDR
class MTX_ADDR(NDRSTRUCT):
    structure =  (
        ('mtx_namelen',ULONG),
        ('mtx_name',PBYTE_ARRAY),
    )

class PMTX_ADDR(NDRPOINTER):
    referent = (
        ('Data',MTX_ADDR),
    )

# 4.1.10.2.3 DRS_MSG_GETCHGREQ_V4
class DRS_MSG_GETCHGREQ_V4(NDRSTRUCT):
    structure =  (
        ('uuidTransportObj',UUID),
        ('pmtxReturnAddress',PMTX_ADDR),
        ('V3',DRS_MSG_GETCHGREQ_V3),
    )

# 4.1.10.2.4 DRS_MSG_GETCHGREQ_V5
class DRS_MSG_GETCHGREQ_V5(NDRSTRUCT):
    structure =  (
        ('uuidDsaObjDest',UUID),
        ('uuidInvocIdSrc',UUID),
        ('pNC',PDSNAME),
        ('usnvecFrom',USN_VECTOR),
        ('pUpToDateVecDestV1',PUPTODATE_VECTOR_V1_EXT),
        ('ulFlags',ULONG),
        ('cMaxObjects',ULONG),
        ('cMaxBytes',ULONG),
        ('ulExtendedOp',ULONG),
        ('liFsmoInfo',ULARGE_INTEGER),
    )

# 4.1.10.2.5 DRS_MSG_GETCHGREQ_V7
class DRS_MSG_GETCHGREQ_V7(NDRSTRUCT):
    structure =  (
        ('uuidTransportObj',UUID),
        ('pmtxReturnAddress',PMTX_ADDR),
        ('V3',DRS_MSG_GETCHGREQ_V3),
        ('pPartialAttrSet',PPARTIAL_ATTR_VECTOR_V1_EXT),
        ('pPartialAttrSetEx1',PPARTIAL_ATTR_VECTOR_V1_EXT),
        ('PrefixTableDest',SCHEMA_PREFIX_TABLE),
    )

# 4.1.10.2.6 DRS_MSG_GETCHGREQ_V8
class DRS_MSG_GETCHGREQ_V8(NDRSTRUCT):
    structure =  (
        ('uuidDsaObjDest',UUID),
        ('uuidInvocIdSrc',UUID),
        ('pNC',PDSNAME),
        ('usnvecFrom',USN_VECTOR),
        ('pUpToDateVecDest',PUPTODATE_VECTOR_V1_EXT),
        ('ulFlags',ULONG),
        ('cMaxObjects',ULONG),
        ('cMaxBytes',ULONG),
        ('ulExtendedOp',ULONG),
        ('liFsmoInfo',ULARGE_INTEGER),
        ('pPartialAttrSet',PPARTIAL_ATTR_VECTOR_V1_EXT),
        ('pPartialAttrSetEx1',PPARTIAL_ATTR_VECTOR_V1_EXT),
        ('PrefixTableDest',SCHEMA_PREFIX_TABLE),
    )

# 4.1.10.2.7 DRS_MSG_GETCHGREQ_V10
class DRS_MSG_GETCHGREQ_V10(NDRSTRUCT):
    structure =  (
        ('uuidDsaObjDest',UUID),
        ('uuidInvocIdSrc',UUID),
        ('pNC',PDSNAME),
        ('usnvecFrom',USN_VECTOR),
        ('pUpToDateVecDest',PUPTODATE_VECTOR_V1_EXT),
        ('ulFlags',ULONG),
        ('cMaxObjects',ULONG),
        ('cMaxBytes',ULONG),
        ('ulExtendedOp',ULONG),
        ('liFsmoInfo',ULARGE_INTEGER),
        ('pPartialAttrSet',PPARTIAL_ATTR_VECTOR_V1_EXT),
        ('pPartialAttrSetEx1',PPARTIAL_ATTR_VECTOR_V1_EXT),
        ('PrefixTableDest',SCHEMA_PREFIX_TABLE),
        ('ulMoreFlags',ULONG),
    )

# 4.1.10.2.1 DRS_MSG_GETCHGREQ
class DRS_MSG_GETCHGREQ(NDRUNION):
    commonHdr = (
        ('tag', DWORD),
    )
    union = {
        4  : ('V4', DRS_MSG_GETCHGREQ_V4),
        5  : ('V5', DRS_MSG_GETCHGREQ_V5),
        7  : ('V7', DRS_MSG_GETCHGREQ_V7),
        8  : ('V8', DRS_MSG_GETCHGREQ_V8),
        10 : ('V10', DRS_MSG_GETCHGREQ_V10),
    }

# 5.16 ATTRVAL
class ATTRVAL(NDRSTRUCT):
    structure =  (
        ('valLen',ULONG),
        ('pVal',PBYTE_ARRAY),
    )

class ATTRVAL_ARRAY(NDRUniConformantArray):
    item = ATTRVAL

class PATTRVAL_ARRAY(NDRPOINTER):
    referent = (
        ('Data',ATTRVAL_ARRAY),
    )

# 5.17 ATTRVALBLOCK
class ATTRVALBLOCK(NDRSTRUCT):
    structure =  (
        ('valCount',ULONG),
        ('pAVal',PATTRVAL_ARRAY),
    )

# 5.9 ATTR
class ATTR(NDRSTRUCT):
    structure =  (
        ('attrTyp',ATTRTYP),
        ('AttrVal',ATTRVALBLOCK),
    )

class ATTR_ARRAY(NDRUniConformantArray):
    item = ATTR

class PATTR_ARRAY(NDRPOINTER):
    referent = (
        ('Data',ATTR_ARRAY),
    )

# 5.10 ATTRBLOCK
class ATTRBLOCK(NDRSTRUCT):
    structure =  (
        ('attrCount',ULONG),
        ('pAttr',PATTR_ARRAY),
    )

# 5.53 ENTINF
class ENTINF(NDRSTRUCT):
    structure =  (
        ('pName',PDSNAME),
        ('ulFlags',ULONG),
        ('AttrBlock',ATTRBLOCK),
    )

class ENTINF_ARRAY(NDRUniConformantArray):
    item = ENTINF

class PENTINF_ARRAY(NDRPOINTER):
    referent = (
        ('Data',ENTINF_ARRAY),
    )

# 5.154 PROPERTY_META_DATA_EXT
class PROPERTY_META_DATA_EXT(NDRSTRUCT):
    structure =  (
        ('dwVersion',DWORD),
        ('timeChanged',DSTIME),
        ('uuidDsaOriginating',UUID),
        ('usnOriginating',USN),
    )

class PROPERTY_META_DATA_EXT_ARRAY(NDRUniConformantArray):
    item = PROPERTY_META_DATA_EXT

# 5.155 PROPERTY_META_DATA_EXT_VECTOR
class PROPERTY_META_DATA_EXT_VECTOR(NDRSTRUCT):
    structure =  (
        ('cNumProps',DWORD),
        ('rgMetaData',PROPERTY_META_DATA_EXT_ARRAY),
    )

class PPROPERTY_META_DATA_EXT_VECTOR(NDRPOINTER):
    referent = (
        ('Data',PROPERTY_META_DATA_EXT_VECTOR),
    )

# 5.161 REPLENTINFLIST

class REPLENTINFLIST(NDRSTRUCT):
    structure =  (
        ('pNextEntInf',NDRPOINTER),
        ('Entinf',ENTINF),
        ('fIsNCPrefix',BOOL),
        ('pParentGuidm',PUUID),
        ('pMetaDataExt',PPROPERTY_META_DATA_EXT_VECTOR),
    )
    # ToDo: Here we should work with getData and fromString because we're cheating with pNextEntInf
    def fromString(self, data, soFar = 0 ):
        # Here we're changing the struct so we can represent a linked list with NDR
        self.fields['pNextEntInf'] = PREPLENTINFLIST(isNDR64 = self._isNDR64)
        retVal = NDRSTRUCT.fromString(self, data, soFar)
        return retVal

class PREPLENTINFLIST(NDRPOINTER):
    referent = (
        ('Data',REPLENTINFLIST),
    )

# 4.1.10.2.9 DRS_MSG_GETCHGREPLY_V1
class DRS_MSG_GETCHGREPLY_V1(NDRSTRUCT):
    structure =  (
        ('uuidDsaObjSrc',UUID),
        ('uuidInvocIdSrc',UUID),
        ('pNC',PDSNAME),
        ('usnvecFrom',USN_VECTOR),
        ('usnvecTo',USN_VECTOR),
        ('pUpToDateVecSrcV1',PUPTODATE_VECTOR_V1_EXT),
        ('PrefixTableSrc',SCHEMA_PREFIX_TABLE),
        ('ulExtendedRet',EXOP_ERR),
        ('cNumObjects',ULONG),
        ('cNumBytes',ULONG),
        ('pObjects',PREPLENTINFLIST),
        ('fMoreData',BOOL),
    )

# 4.1.10.2.15 DRS_COMPRESSED_BLOB
class DRS_COMPRESSED_BLOB(NDRSTRUCT):
    structure =  (
        ('cbUncompressedSize',DWORD),
        ('cbCompressedSize',DWORD),
        ('pbCompressedData',BYTE_ARRAY),
    )

# 4.1.10.2.10 DRS_MSG_GETCHGREPLY_V2
class DRS_MSG_GETCHGREPLY_V2(NDRSTRUCT):
    structure =  (
        ('CompressedV1',DRS_COMPRESSED_BLOB),
    )

# 5.199 UPTODATE_CURSOR_V2
class UPTODATE_CURSOR_V2(NDRSTRUCT):
    structure =  (
        ('uuidDsa',UUID),
        ('usnHighPropUpdate',USN),
        ('timeLastSyncSuccess',DSTIME),
    )

class UPTODATE_CURSOR_V2_ARRAY(NDRUniConformantArray):
    item = UPTODATE_CURSOR_V2

# 5.201 UPTODATE_VECTOR_V2_EXT
class UPTODATE_VECTOR_V2_EXT(NDRSTRUCT):
    structure =  (
        ('dwVersion',DWORD),
        ('dwReserved1',DWORD),
        ('cNumCursors',DWORD),
        ('dwReserved2',DWORD),
        ('rgCursors',UPTODATE_CURSOR_V2_ARRAY),
    )

class PUPTODATE_VECTOR_V2_EXT(NDRPOINTER):
    referent = (
        ('Data',UPTODATE_VECTOR_V2_EXT),
    )

# 5.211 VALUE_META_DATA_EXT_V1
class VALUE_META_DATA_EXT_V1(NDRSTRUCT):
    structure =  (
        ('timeCreated',DSTIME),
        ('MetaData',PROPERTY_META_DATA_EXT),
    )

# 5.215 VALUE_META_DATA_EXT_V3
class VALUE_META_DATA_EXT_V3(NDRSTRUCT):
    structure =  (
        ('timeCreated',DSTIME),
        ('MetaData',PROPERTY_META_DATA_EXT),
        ('unused1',DWORD),
        ('unused1',DWORD),
        ('unused1',DWORD),
        ('timeExpired',DSTIME),
    )

# 5.167 REPLVALINF_V1
class REPLVALINF_V1(NDRSTRUCT):
    structure =  (
        ('pObject',PDSNAME),
        ('attrTyp',ATTRTYP),
        ('Aval',ATTRVAL),
        ('fIsPresent',BOOL),
        ('MetaData',VALUE_META_DATA_EXT_V1),
    )

    def fromString(self, data, soFar = 0):
        retVal = NDRSTRUCT.fromString(self, data, soFar)
        #self.dumpRaw()
        return retVal

class REPLVALINF_V1_ARRAY(NDRUniConformantArray):
    item = REPLVALINF_V1

class PREPLVALINF_V1_ARRAY(NDRPOINTER):
    referent = (
        ('Data', REPLVALINF_V1_ARRAY),
    )

# 5.168 REPLVALINF_V3
class REPLVALINF_V3(NDRSTRUCT):
    structure = (
        ('pObject', PDSNAME),
        ('attrTyp', ATTRTYP),
        ('Aval', ATTRVAL),
        ('fIsPresent', BOOL),
        ('MetaData', VALUE_META_DATA_EXT_V3),
    )

    def fromString(self, data, soFar=0):
        retVal = NDRSTRUCT.fromString(self, data, soFar)
        # self.dumpRaw()
        return retVal

class REPLVALINF_V3_ARRAY(NDRUniConformantArray):
    item = REPLVALINF_V3

class PREPLVALINF_V3_ARRAY(NDRPOINTER):
    referent = (
        ('Data', REPLVALINF_V3_ARRAY),
    )

# 5.169 REPLVALINF_NATIVE
REPLVALINF_NATIVE = REPLVALINF_V3

# 4.1.10.2.11 DRS_MSG_GETCHGREPLY_V6
class DRS_MSG_GETCHGREPLY_V6(NDRSTRUCT):
    structure =  (
        ('uuidDsaObjSrc',UUID),
        ('uuidInvocIdSrc',UUID),
        ('pNC',PDSNAME),
        ('usnvecFrom',USN_VECTOR),
        ('usnvecTo',USN_VECTOR),
        ('pUpToDateVecSrc',PUPTODATE_VECTOR_V2_EXT),
        ('PrefixTableSrc',SCHEMA_PREFIX_TABLE),
        ('ulExtendedRet',EXOP_ERR),
        ('cNumObjects',ULONG),
        ('cNumBytes',ULONG),
        ('pObjects',PREPLENTINFLIST),
        ('fMoreData',BOOL),
        ('cNumNcSizeObjectsc',ULONG),
        ('cNumNcSizeValues',ULONG),
        ('cNumValues',DWORD),
        #('rgValues',PREPLVALINF_V1_ARRAY),
        # ToDo: Once we find out what's going on with PREPLVALINF_ARRAY get it back
        # Seems there's something in there that is not being parsed correctly
        ('rgValues',DWORD),
        ('dwDRSError',DWORD),
    )

# 4.1.10.2.14 DRS_COMP_ALG_TYPE
class DRS_COMP_ALG_TYPE(NDRENUM):
    class enumItems(Enum):
        DRS_COMP_ALG_NONE   = 0
        DRS_COMP_ALG_UNUSED = 1
        DRS_COMP_ALG_MSZIP  = 2
        DRS_COMP_ALG_WIN2K3 = 3

# 4.1.10.2.12 DRS_MSG_GETCHGREPLY_V7
class DRS_MSG_GETCHGREPLY_V7(NDRSTRUCT):
    structure =  (
        ('dwCompressedVersion',DWORD),
        ('CompressionAlg',DRS_COMP_ALG_TYPE),
        ('CompressedAny',DRS_COMPRESSED_BLOB),
    )

# 4.1.10.2.13 DRS_MSG_GETCHGREPLY_V9
class DRS_MSG_GETCHGREPLY_V9(NDRSTRUCT):
    structure =  (
        ('uuidDsaObjSrc',UUID),
        ('uuidInvocIdSrc',UUID),
        ('pNC',PDSNAME),
        ('usnvecFrom',USN_VECTOR),
        ('usnvecTo',USN_VECTOR),
        ('pUpToDateVecSrc',PUPTODATE_VECTOR_V2_EXT),
        ('PrefixTableSrc',SCHEMA_PREFIX_TABLE),
        ('ulExtendedRet',EXOP_ERR),
        ('cNumObjects',ULONG),
        ('cNumBytes',ULONG),
        ('pObjects',PREPLENTINFLIST),
        ('fMoreData',BOOL),
        ('cNumNcSizeObjectsc',ULONG),
        ('cNumNcSizeValues',ULONG),
        ('cNumValues',DWORD),
        #('rgValues',PREPLVALINF_V3_ARRAY),
        # ToDo: Once we find out what's going on with PREPLVALINF_ARRAY get it back
        # Seems there's something in there that is not being parsed correctly
        ('rgValues',DWORD),
        ('dwDRSError',DWORD),
    )

# 4.1.10.2.14 DRS_MSG_GETCHGREPLY_NATIVE
DRS_MSG_GETCHGREPLY_NATIVE = DRS_MSG_GETCHGREPLY_V9

# 4.1.10.2.8 DRS_MSG_GETCHGREPLY
class DRS_MSG_GETCHGREPLY(NDRUNION):
    commonHdr = (
        ('tag', DWORD),
    )
    union = {
        1  : ('V1', DRS_MSG_GETCHGREPLY_V1),
        2  : ('V2', DRS_MSG_GETCHGREPLY_V2),
        6  : ('V6', DRS_MSG_GETCHGREPLY_V6),
        7  : ('V7', DRS_MSG_GETCHGREPLY_V7),
        9  : ('V9', DRS_MSG_GETCHGREPLY_V9),
    }

# 4.1.27.1.2 DRS_MSG_VERIFYREQ_V1
class DRS_MSG_VERIFYREQ_V1(NDRSTRUCT):
    structure =  (
        ('dwFlags',DWORD),
        ('cNames',DWORD),
        ('rpNames',PPDSNAME_ARRAY),
        ('RequiredAttrs',ATTRBLOCK),
        ('PrefixTable',SCHEMA_PREFIX_TABLE),
    )

# 4.1.27.1.1 DRS_MSG_VERIFYREQ
class DRS_MSG_VERIFYREQ(NDRUNION):
    commonHdr = (
        ('tag', DWORD),
    )
    union = {
        1  : ('V1', DRS_MSG_VERIFYREQ_V1),
    }

# 4.1.27.1.4 DRS_MSG_VERIFYREPLY_V1
class DRS_MSG_VERIFYREPLY_V1(NDRSTRUCT):
    structure =  (
        ('error',DWORD),
        ('cNames',DWORD),
        ('rpEntInf',PENTINF_ARRAY),
        ('PrefixTable',SCHEMA_PREFIX_TABLE),
    )

# 4.1.27.1.3 DRS_MSG_VERIFYREPLY
class DRS_MSG_VERIFYREPLY(NDRUNION):
    commonHdr = (
        ('tag', DWORD),
    )
    union = {
        1  : ('V1', DRS_MSG_VERIFYREPLY_V1),
    }

# 4.1.11.1.2 DRS_MSG_NT4_CHGLOG_REQ_V1
class DRS_MSG_NT4_CHGLOG_REQ_V1(NDRSTRUCT):
    structure =  (
        ('dwFlags',DWORD),
        ('PreferredMaximumLength',DWORD),
        ('cbRestart',DWORD),
        ('pRestart',PBYTE_ARRAY),
    )

# 4.1.11.1.1 DRS_MSG_NT4_CHGLOG_REQ
class DRS_MSG_NT4_CHGLOG_REQ(NDRUNION):
    commonHdr = (
        ('tag', DWORD),
    )
    union = {
        1  : ('V1', DRS_MSG_NT4_CHGLOG_REQ_V1),
    }

# 4.1.11.1.5 NT4_REPLICATION_STATE
class NT4_REPLICATION_STATE(NDRSTRUCT):
    structure =  (
        ('SamSerialNumber',LARGE_INTEGER),
        ('SamCreationTime',LARGE_INTEGER),
        ('BuiltinSerialNumber',LARGE_INTEGER),
        ('BuiltinCreationTime',LARGE_INTEGER),
        ('LsaSerialNumber',LARGE_INTEGER),
        ('LsaCreationTime',LARGE_INTEGER),
    )

# 4.1.11.1.4 DRS_MSG_NT4_CHGLOG_REPLY_V1
class DRS_MSG_NT4_CHGLOG_REPLY_V1(NDRSTRUCT):
    structure =  (
        ('cbRestart',DWORD),
        ('cbLog',DWORD),
        ('ReplicationState',NT4_REPLICATION_STATE),
        ('ActualNtStatus',DWORD),
        ('pRestart',PBYTE_ARRAY),
        ('pLog',PBYTE_ARRAY),
    )

# 4.1.11.1.3 DRS_MSG_NT4_CHGLOG_REPLY
class DRS_MSG_NT4_CHGLOG_REPLY(NDRUNION):
    commonHdr = (
        ('tag', DWORD),
    )
    union = {
        1  : ('V1', DRS_MSG_NT4_CHGLOG_REPLY_V1),
    }

################################################################################
# RPC CALLS
################################################################################
# 4.1.3 IDL_DRSBind (Opnum 0)
class DRSBind(NDRCALL):
    opnum = 0
    structure = (
        ('puuidClientDsa', PUUID),
        ('pextClient', PDRS_EXTENSIONS),
    )

class DRSBindResponse(NDRCALL):
    structure = (
        ('ppextServer', PDRS_EXTENSIONS),
        ('phDrs', DRS_HANDLE),
        ('ErrorCode',DWORD),
    )

# 4.1.25 IDL_DRSUnbind (Opnum 1)
class DRSUnbind(NDRCALL):
    opnum = 1
    structure = (
        ('phDrs', DRS_HANDLE),
    )

class DRSUnbindResponse(NDRCALL):
    structure = (
        ('phDrs', DRS_HANDLE),
        ('ErrorCode',DWORD),
    )

# 4.1.10 IDL_DRSGetNCChanges (Opnum 3)
class DRSGetNCChanges(NDRCALL):
    opnum = 3
    structure = (
        ('hDrs', DRS_HANDLE),
        ('dwInVersion', DWORD),
        ('pmsgIn', DRS_MSG_GETCHGREQ),
    )

class DRSGetNCChangesResponse(NDRCALL):
    structure = (
        ('pdwOutVersion', DWORD),
        ('pmsgOut', DRS_MSG_GETCHGREPLY),
        ('ErrorCode',DWORD),
    )

# 4.1.27 IDL_DRSVerifyNames (Opnum 8)
class DRSVerifyNames(NDRCALL):
    opnum = 8
    structure = (
        ('hDrs', DRS_HANDLE),
        ('dwInVersion', DWORD),
        ('pmsgIn', DRS_MSG_VERIFYREQ),
    )

class DRSVerifyNamesResponse(NDRCALL):
    structure = (
        ('pdwOutVersion', DWORD),
        ('pmsgOut', DRS_MSG_VERIFYREPLY),
        ('ErrorCode',DWORD),
    )
# 4.1.11 IDL_DRSGetNT4ChangeLog (Opnum 11)
class DRSGetNT4ChangeLog(NDRCALL):
    opnum = 11
    structure = (
        ('hDrs', DRS_HANDLE),
        ('dwInVersion', DWORD),
        ('pmsgIn', DRS_MSG_NT4_CHGLOG_REQ),
    )

class DRSGetNT4ChangeLogResponse(NDRCALL):
    structure = (
        ('pdwOutVersion', DWORD),
        ('pmsgOut', DRS_MSG_NT4_CHGLOG_REPLY),
        ('ErrorCode',DWORD),
    )

# 4.1.4 IDL_DRSCrackNames (Opnum 12)
class DRSCrackNames(NDRCALL):
    opnum = 12
    structure = (
        ('hDrs', DRS_HANDLE),
        ('dwInVersion', DWORD),
        ('pmsgIn', DRS_MSG_CRACKREQ),
    )

class DRSCrackNamesResponse(NDRCALL):
    structure = (
        ('pdwOutVersion', DWORD),
        ('pmsgOut', DRS_MSG_CRACKREPLY),
        ('ErrorCode',DWORD),
    )

# 4.1.5 IDL_DRSDomainControllerInfo (Opnum 16)
class DRSDomainControllerInfo(NDRCALL):
    opnum = 16
    structure = (
        ('hDrs', DRS_HANDLE),
        ('dwInVersion', DWORD),
        ('pmsgIn', DRS_MSG_DCINFOREQ),
    )

class DRSDomainControllerInfoResponse(NDRCALL):
    structure = (
        ('pdwOutVersion', DWORD),
        ('pmsgOut', DRS_MSG_DCINFOREPLY),
        ('ErrorCode',DWORD),
    )

################################################################################
# OPNUMs and their corresponding structures
################################################################################
OPNUMS = {
 0 : (DRSBind,DRSBindResponse ),
 1 : (DRSUnbind,DRSUnbindResponse ),
 3 : (DRSGetNCChanges,DRSGetNCChangesResponse ),
 12: (DRSCrackNames,DRSCrackNamesResponse ),
 16: (DRSDomainControllerInfo,DRSDomainControllerInfoResponse ),
}

################################################################################
# HELPER FUNCTIONS
################################################################################
def checkNullString(string):
    if string == NULL:
        return string

    if string[-1:] != '\x00':
        return string + '\x00'
    else:
        return string

def hDRSUnbind(dce, hDrs):
    request = DRSUnbind()
    request['phDrs'] = hDrs
    return dce.request(request)

def hDRSDomainControllerInfo(dce, hDrs, domain, infoLevel):
    request = DRSDomainControllerInfo()
    request['hDrs'] = hDrs
    request['dwInVersion'] = 1

    request['pmsgIn']['tag'] = 1
    request['pmsgIn']['V1']['Domain'] = checkNullString(domain)
    request['pmsgIn']['V1']['InfoLevel'] = infoLevel
    return dce.request(request)

def hDRSCrackNames(dce, hDrs, flags, formatOffered, formatDesired, rpNames = ()):
    request = DRSCrackNames()
    request['hDrs'] = hDrs
    request['dwInVersion'] = 1

    request['pmsgIn']['tag'] = 1
    request['pmsgIn']['V1']['CodePage'] = 0
    request['pmsgIn']['V1']['LocaleId'] = 0
    request['pmsgIn']['V1']['dwFlags'] = flags
    request['pmsgIn']['V1']['formatOffered'] = formatOffered
    request['pmsgIn']['V1']['formatDesired'] = formatDesired
    request['pmsgIn']['V1']['cNames'] = len(rpNames)
    for name in rpNames:
        record = LPWSTR()
        record['Data'] = checkNullString(name)
        request['pmsgIn']['V1']['rpNames'].append(record)

    return dce.request(request)

def deriveKey(baseKey):
        # 2.2.11.1.3 Deriving Key1 and Key2 from a Little-Endian, Unsigned Integer Key
        # Let I be the little-endian, unsigned integer.
        # Let I[X] be the Xth byte of I, where I is interpreted as a zero-base-index array of bytes.
        # Note that because I is in little-endian byte order, I[0] is the least significant byte.
        # Key1 is a concatenation of the following values: I[0], I[1], I[2], I[3], I[0], I[1], I[2].
        # Key2 is a concatenation of the following values: I[3], I[0], I[1], I[2], I[3], I[0], I[1]
        key = pack('<L',baseKey)
        key1 = [key[0] , key[1] , key[2] , key[3] , key[0] , key[1] , key[2]]
        key2 = [key[3] , key[0] , key[1] , key[2] , key[3] , key[0] , key[1]]
        if PY2:
            return transformKey(b''.join(key1)),transformKey(b''.join(key2))
        else:
            return transformKey(bytes(key1)),transformKey(bytes(key2))

def removeDESLayer(cryptedHash, rid):
        Key1,Key2 = deriveKey(rid)

        Crypt1 = DES.new(Key1, DES.MODE_ECB)
        Crypt2 = DES.new(Key2, DES.MODE_ECB)

        decryptedHash = Crypt1.decrypt(cryptedHash[:8]) + Crypt2.decrypt(cryptedHash[8:])

        return decryptedHash

def DecryptAttributeValue(dce, attribute):
    sessionKey = dce.get_session_key()
    # Is it a Kerberos Session Key?
    if isinstance(sessionKey, crypto.Key):
        # Extract its contents and move on
        sessionKey = sessionKey.contents

    encryptedPayload = ENCRYPTED_PAYLOAD(attribute)

    md5 = hashlib.new('md5')
    md5.update(sessionKey)
    md5.update(encryptedPayload['Salt'])
    finalMD5 = md5.digest()

    cipher = ARC4.new(finalMD5)
    plainText = cipher.decrypt(attribute[16:])

    #chkSum = (binascii.crc32(plainText[4:])) & 0xffffffff
    #if unpack('<L',plainText[:4])[0] != chkSum:
    #    print "RECEIVED 0x%x" % unpack('<L',plainText[:4])[0]
    #    print "CALCULATED 0x%x" % chkSum

    return plainText[4:]

# 5.16.4 ATTRTYP-to-OID Conversion
def MakeAttid(prefixTable, oid):
    # get the last value in the original OID: the value * after the last '.'
    lastValue = int(oid.split('.')[-1])

    # convert the dotted form of OID into a BER encoded binary * format.
    # The BER encoding of OID is described in section * 8.19 of [ITUX690]
    from pyasn1.type import univ
    from pyasn1.codec.ber import encoder
    binaryOID = encoder.encode(univ.ObjectIdentifier(oid))[2:]

    # get the prefix of the OID
    if lastValue < 128:
        oidPrefix = list(binaryOID[:-1])
    else:
        oidPrefix = list(binaryOID[:-2])

    # search the prefix in the prefix table, if none found, add
    # one entry for the new prefix.
    fToAdd = True
    pos = len(prefixTable)
    for j, item in enumerate(prefixTable):
        if item['prefix']['elements'] == oidPrefix:
            fToAdd = False
            pos = j
            break

    if fToAdd is True:
        entry = PrefixTableEntry()
        entry['ndx'] = pos
        entry['prefix']['length'] = len(oidPrefix)
        entry['prefix']['elements'] = oidPrefix
        prefixTable.append(entry)

    # compose the attid
    lowerWord = lastValue % 16384
    if lastValue >= 16384:
        # mark it so that it is known to not be the whole lastValue
        lowerWord += 32768

    upperWord = pos

    attrTyp = ATTRTYP()
    attrTyp['Data'] = (upperWord << 16) + lowerWord
    return attrTyp

def OidFromAttid(prefixTable, attr):
    # separate the ATTRTYP into two parts
    upperWord = attr // 65536
    lowerWord = attr % 65536

    # search in the prefix table to find the upperWord, if found,
    # construct the binary OID by appending lowerWord to the end of
    # found prefix.

    binaryOID = None
    for j, item in enumerate(prefixTable):
        if item['ndx'] == upperWord:
            binaryOID = item['prefix']['elements'][:item['prefix']['length']]
            if lowerWord < 128:
                binaryOID.append(pack('B',lowerWord))
            else:
                if lowerWord >= 32768:
                    lowerWord -= 32768
                binaryOID.append(pack('B',(((lowerWord//128) % 128)+128)))
                binaryOID.append(pack('B',(lowerWord%128)))
            break

    if binaryOID is None:
        return None
    return str(decoder.decode(b'\x06' + pack('B',(len(binaryOID))) + b''.join(binaryOID), asn1Spec = univ.ObjectIdentifier())[0])

if __name__ == '__main__':
    prefixTable = []
    oid0 = '1.2.840.113556.1.4.94'
    oid1 = '2.5.6.2'
    oid2 = '1.2.840.113556.1.2.1'
    oid3 = '1.2.840.113556.1.3.223'
    oid4 = '1.2.840.113556.1.5.7000.53'

    o0 = MakeAttid(prefixTable, oid0)
    print(hex(o0))
    o1 = MakeAttid(prefixTable, oid1)
    print(hex(o1))
    o2 = MakeAttid(prefixTable, oid2)
    print(hex(o2))
    o3 = MakeAttid(prefixTable, oid3)
    print(hex(o3))
    o4 = MakeAttid(prefixTable, oid4)
    print(hex(o4))
    jj = OidFromAttid(prefixTable, o0)
    print(jj)
    jj = OidFromAttid(prefixTable, o1)
    print(jj)
    jj = OidFromAttid(prefixTable, o2)
    print(jj)
    jj = OidFromAttid(prefixTable, o3)
    print(jj)
    jj = OidFromAttid(prefixTable, o4)
    print(jj)