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# 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-LSAT] 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 impacket import nt_errors 

from impacket.dcerpc.v5.dtypes import ULONG, LONG, PRPC_SID, RPC_UNICODE_STRING, LPWSTR, PRPC_UNICODE_STRING, NTSTATUS, \ 

NULL 

from impacket.dcerpc.v5.enum import Enum 

from impacket.dcerpc.v5.lsad import LSAPR_HANDLE, PLSAPR_TRUST_INFORMATION_ARRAY 

from impacket.dcerpc.v5.ndr import NDRCALL, NDRSTRUCT, NDRENUM, NDRPOINTER, NDRUniConformantArray 

from impacket.dcerpc.v5.rpcrt import DCERPCException 

from impacket.dcerpc.v5.samr import SID_NAME_USE 

from impacket.uuid import uuidtup_to_bin 

 

MSRPC_UUID_LSAT = uuidtup_to_bin(('12345778-1234-ABCD-EF00-0123456789AB','0.0')) 

 

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 

39 ↛ 44line 39 didn't jump to line 44, because the condition on line 39 was never false if key in nt_errors.ERROR_MESSAGES: 

error_msg_short = nt_errors.ERROR_MESSAGES[key][0] 

error_msg_verbose = nt_errors.ERROR_MESSAGES[key][1] 

return 'LSAT SessionError: code: 0x%x - %s - %s' % (self.error_code, error_msg_short, error_msg_verbose) 

else: 

return 'LSAT SessionError: unknown error code: 0x%x' % self.error_code 

 

################################################################################ 

# CONSTANTS 

################################################################################ 

# 2.2.10 ACCESS_MASK 

POLICY_LOOKUP_NAMES = 0x00000800 

 

################################################################################ 

# STRUCTURES 

################################################################################ 

# 2.2.12 LSAPR_REFERENCED_DOMAIN_LIST 

class LSAPR_REFERENCED_DOMAIN_LIST(NDRSTRUCT): 

structure = ( 

('Entries', ULONG), 

('Domains', PLSAPR_TRUST_INFORMATION_ARRAY), 

('MaxEntries', ULONG), 

) 

 

class PLSAPR_REFERENCED_DOMAIN_LIST(NDRPOINTER): 

referent = ( 

('Data', LSAPR_REFERENCED_DOMAIN_LIST), 

) 

 

# 2.2.14 LSA_TRANSLATED_SID 

class LSA_TRANSLATED_SID(NDRSTRUCT): 

structure = ( 

('Use', SID_NAME_USE), 

('RelativeId', ULONG), 

('DomainIndex', LONG), 

) 

 

# 2.2.15 LSAPR_TRANSLATED_SIDS 

class LSA_TRANSLATED_SID_ARRAY(NDRUniConformantArray): 

item = LSA_TRANSLATED_SID 

 

class PLSA_TRANSLATED_SID_ARRAY(NDRPOINTER): 

referent = ( 

('Data', LSA_TRANSLATED_SID_ARRAY), 

) 

 

class LSAPR_TRANSLATED_SIDS(NDRSTRUCT): 

structure = ( 

('Entries', ULONG), 

('Sids', PLSA_TRANSLATED_SID_ARRAY), 

) 

 

# 2.2.16 LSAP_LOOKUP_LEVEL 

class LSAP_LOOKUP_LEVEL(NDRENUM): 

class enumItems(Enum): 

LsapLookupWksta = 1 

LsapLookupPDC = 2 

LsapLookupTDL = 3 

LsapLookupGC = 4 

LsapLookupXForestReferral = 5 

LsapLookupXForestResolve = 6 

LsapLookupRODCReferralToFullDC = 7 

 

# 2.2.17 LSAPR_SID_INFORMATION 

class LSAPR_SID_INFORMATION(NDRSTRUCT): 

structure = ( 

('Sid', PRPC_SID), 

) 

 

# 2.2.18 LSAPR_SID_ENUM_BUFFER 

class LSAPR_SID_INFORMATION_ARRAY(NDRUniConformantArray): 

item = LSAPR_SID_INFORMATION 

 

class PLSAPR_SID_INFORMATION_ARRAY(NDRPOINTER): 

referent = ( 

('Data', LSAPR_SID_INFORMATION_ARRAY), 

) 

 

class LSAPR_SID_ENUM_BUFFER(NDRSTRUCT): 

structure = ( 

('Entries', ULONG), 

('SidInfo', PLSAPR_SID_INFORMATION_ARRAY), 

) 

 

# 2.2.19 LSAPR_TRANSLATED_NAME 

class LSAPR_TRANSLATED_NAME(NDRSTRUCT): 

structure = ( 

('Use', SID_NAME_USE), 

('Name', RPC_UNICODE_STRING), 

('DomainIndex', LONG), 

) 

 

# 2.2.20 LSAPR_TRANSLATED_NAMES 

class LSAPR_TRANSLATED_NAME_ARRAY(NDRUniConformantArray): 

item = LSAPR_TRANSLATED_NAME 

 

class PLSAPR_TRANSLATED_NAME_ARRAY(NDRPOINTER): 

referent = ( 

('Data', LSAPR_TRANSLATED_NAME_ARRAY), 

) 

 

class LSAPR_TRANSLATED_NAMES(NDRSTRUCT): 

structure = ( 

('Entries', ULONG), 

('Names', PLSAPR_TRANSLATED_NAME_ARRAY), 

) 

 

# 2.2.21 LSAPR_TRANSLATED_NAME_EX 

class LSAPR_TRANSLATED_NAME_EX(NDRSTRUCT): 

structure = ( 

('Use', SID_NAME_USE), 

('Name', RPC_UNICODE_STRING), 

('DomainIndex', LONG), 

('Flags', ULONG), 

) 

 

# 2.2.22 LSAPR_TRANSLATED_NAMES_EX 

class LSAPR_TRANSLATED_NAME_EX_ARRAY(NDRUniConformantArray): 

item = LSAPR_TRANSLATED_NAME_EX 

 

class PLSAPR_TRANSLATED_NAME_EX_ARRAY(NDRPOINTER): 

referent = ( 

('Data', LSAPR_TRANSLATED_NAME_EX_ARRAY), 

) 

 

class LSAPR_TRANSLATED_NAMES_EX(NDRSTRUCT): 

structure = ( 

('Entries', ULONG), 

('Names', PLSAPR_TRANSLATED_NAME_EX_ARRAY), 

) 

 

# 2.2.23 LSAPR_TRANSLATED_SID_EX 

class LSAPR_TRANSLATED_SID_EX(NDRSTRUCT): 

structure = ( 

('Use', SID_NAME_USE), 

('RelativeId', ULONG), 

('DomainIndex', LONG), 

('Flags', ULONG), 

) 

 

# 2.2.24 LSAPR_TRANSLATED_SIDS_EX 

class LSAPR_TRANSLATED_SID_EX_ARRAY(NDRUniConformantArray): 

item = LSAPR_TRANSLATED_SID_EX 

 

class PLSAPR_TRANSLATED_SID_EX_ARRAY(NDRPOINTER): 

referent = ( 

('Data', LSAPR_TRANSLATED_SID_EX_ARRAY), 

) 

 

class LSAPR_TRANSLATED_SIDS_EX(NDRSTRUCT): 

structure = ( 

('Entries', ULONG), 

('Sids', PLSAPR_TRANSLATED_SID_EX_ARRAY), 

) 

 

# 2.2.25 LSAPR_TRANSLATED_SID_EX2 

class LSAPR_TRANSLATED_SID_EX2(NDRSTRUCT): 

structure = ( 

('Use', SID_NAME_USE), 

('Sid', PRPC_SID), 

('DomainIndex', LONG), 

('Flags', ULONG), 

) 

 

# 2.2.26 LSAPR_TRANSLATED_SIDS_EX2 

class LSAPR_TRANSLATED_SID_EX2_ARRAY(NDRUniConformantArray): 

item = LSAPR_TRANSLATED_SID_EX2 

 

class PLSAPR_TRANSLATED_SID_EX2_ARRAY(NDRPOINTER): 

referent = ( 

('Data', LSAPR_TRANSLATED_SID_EX2_ARRAY), 

) 

 

class LSAPR_TRANSLATED_SIDS_EX2(NDRSTRUCT): 

structure = ( 

('Entries', ULONG), 

('Sids', PLSAPR_TRANSLATED_SID_EX2_ARRAY), 

) 

 

class RPC_UNICODE_STRING_ARRAY(NDRUniConformantArray): 

item = RPC_UNICODE_STRING 

 

################################################################################ 

# RPC CALLS 

################################################################################ 

# 3.1.4.4 LsarGetUserName (Opnum 45) 

class LsarGetUserName(NDRCALL): 

opnum = 45 

structure = ( 

('SystemName', LPWSTR), 

('UserName', PRPC_UNICODE_STRING), 

('DomainName', PRPC_UNICODE_STRING), 

) 

 

class LsarGetUserNameResponse(NDRCALL): 

structure = ( 

('UserName', PRPC_UNICODE_STRING), 

('DomainName', PRPC_UNICODE_STRING), 

('ErrorCode', NTSTATUS), 

) 

 

# 3.1.4.5 LsarLookupNames4 (Opnum 77) 

class LsarLookupNames4(NDRCALL): 

opnum = 77 

structure = ( 

('Count', ULONG), 

('Names', RPC_UNICODE_STRING_ARRAY), 

('TranslatedSids', LSAPR_TRANSLATED_SIDS_EX2), 

('LookupLevel', LSAP_LOOKUP_LEVEL), 

('MappedCount', ULONG), 

('LookupOptions', ULONG), 

('ClientRevision', ULONG), 

) 

 

class LsarLookupNames4Response(NDRCALL): 

structure = ( 

('ReferencedDomains', PLSAPR_REFERENCED_DOMAIN_LIST), 

('TranslatedSids', LSAPR_TRANSLATED_SIDS_EX2), 

('MappedCount', ULONG), 

('ErrorCode', NTSTATUS), 

) 

 

# 3.1.4.6 LsarLookupNames3 (Opnum 68) 

class LsarLookupNames3(NDRCALL): 

opnum = 68 

structure = ( 

('PolicyHandle', LSAPR_HANDLE), 

('Count', ULONG), 

('Names', RPC_UNICODE_STRING_ARRAY), 

('TranslatedSids', LSAPR_TRANSLATED_SIDS_EX2), 

('LookupLevel', LSAP_LOOKUP_LEVEL), 

('MappedCount', ULONG), 

('LookupOptions', ULONG), 

('ClientRevision', ULONG), 

) 

 

class LsarLookupNames3Response(NDRCALL): 

structure = ( 

('ReferencedDomains', PLSAPR_REFERENCED_DOMAIN_LIST), 

('TranslatedSids', LSAPR_TRANSLATED_SIDS_EX2), 

('MappedCount', ULONG), 

('ErrorCode', NTSTATUS), 

) 

 

# 3.1.4.7 LsarLookupNames2 (Opnum 58) 

class LsarLookupNames2(NDRCALL): 

opnum = 58 

structure = ( 

('PolicyHandle', LSAPR_HANDLE), 

('Count', ULONG), 

('Names', RPC_UNICODE_STRING_ARRAY), 

('TranslatedSids', LSAPR_TRANSLATED_SIDS_EX), 

('LookupLevel', LSAP_LOOKUP_LEVEL), 

('MappedCount', ULONG), 

('LookupOptions', ULONG), 

('ClientRevision', ULONG), 

) 

 

class LsarLookupNames2Response(NDRCALL): 

structure = ( 

('ReferencedDomains', PLSAPR_REFERENCED_DOMAIN_LIST), 

('TranslatedSids', LSAPR_TRANSLATED_SIDS_EX), 

('MappedCount', ULONG), 

('ErrorCode', NTSTATUS), 

) 

 

# 3.1.4.8 LsarLookupNames (Opnum 14) 

class LsarLookupNames(NDRCALL): 

opnum = 14 

structure = ( 

('PolicyHandle', LSAPR_HANDLE), 

('Count', ULONG), 

('Names', RPC_UNICODE_STRING_ARRAY), 

('TranslatedSids', LSAPR_TRANSLATED_SIDS), 

('LookupLevel', LSAP_LOOKUP_LEVEL), 

('MappedCount', ULONG), 

) 

 

class LsarLookupNamesResponse(NDRCALL): 

structure = ( 

('ReferencedDomains', PLSAPR_REFERENCED_DOMAIN_LIST), 

('TranslatedSids', LSAPR_TRANSLATED_SIDS), 

('MappedCount', ULONG), 

('ErrorCode', NTSTATUS), 

) 

 

# 3.1.4.9 LsarLookupSids3 (Opnum 76) 

class LsarLookupSids3(NDRCALL): 

opnum = 76 

structure = ( 

('SidEnumBuffer', LSAPR_SID_ENUM_BUFFER), 

('TranslatedNames', LSAPR_TRANSLATED_NAMES_EX), 

('LookupLevel', LSAP_LOOKUP_LEVEL), 

('MappedCount', ULONG), 

('LookupOptions', ULONG), 

('ClientRevision', ULONG), 

) 

 

class LsarLookupSids3Response(NDRCALL): 

structure = ( 

('ReferencedDomains', PLSAPR_REFERENCED_DOMAIN_LIST), 

('TranslatedNames', LSAPR_TRANSLATED_NAMES_EX), 

('MappedCount', ULONG), 

('ErrorCode', NTSTATUS), 

) 

 

# 3.1.4.10 LsarLookupSids2 (Opnum 57) 

class LsarLookupSids2(NDRCALL): 

opnum = 57 

structure = ( 

('PolicyHandle', LSAPR_HANDLE), 

('SidEnumBuffer', LSAPR_SID_ENUM_BUFFER), 

('TranslatedNames', LSAPR_TRANSLATED_NAMES_EX), 

('LookupLevel', LSAP_LOOKUP_LEVEL), 

('MappedCount', ULONG), 

('LookupOptions', ULONG), 

('ClientRevision', ULONG), 

) 

 

class LsarLookupSids2Response(NDRCALL): 

structure = ( 

('ReferencedDomains', PLSAPR_REFERENCED_DOMAIN_LIST), 

('TranslatedNames', LSAPR_TRANSLATED_NAMES_EX), 

('MappedCount', ULONG), 

('ErrorCode', NTSTATUS), 

) 

 

# 3.1.4.11 LsarLookupSids (Opnum 15) 

class LsarLookupSids(NDRCALL): 

opnum = 15 

structure = ( 

('PolicyHandle', LSAPR_HANDLE), 

('SidEnumBuffer', LSAPR_SID_ENUM_BUFFER), 

('TranslatedNames', LSAPR_TRANSLATED_NAMES), 

('LookupLevel', LSAP_LOOKUP_LEVEL), 

('MappedCount', ULONG), 

) 

 

class LsarLookupSidsResponse(NDRCALL): 

structure = ( 

('ReferencedDomains', PLSAPR_REFERENCED_DOMAIN_LIST), 

('TranslatedNames', LSAPR_TRANSLATED_NAMES), 

('MappedCount', ULONG), 

('ErrorCode', NTSTATUS), 

) 

 

################################################################################ 

# OPNUMs and their corresponding structures 

################################################################################ 

OPNUMS = { 

14 : (LsarLookupNames, LsarLookupNamesResponse), 

15 : (LsarLookupSids, LsarLookupSidsResponse), 

45 : (LsarGetUserName, LsarGetUserNameResponse), 

57 : (LsarLookupSids2, LsarLookupSids2Response), 

58 : (LsarLookupNames2, LsarLookupNames2Response), 

68 : (LsarLookupNames3, LsarLookupNames3Response), 

76 : (LsarLookupSids3, LsarLookupSids3Response), 

77 : (LsarLookupNames4, LsarLookupNames4Response), 

} 

 

################################################################################ 

# HELPER FUNCTIONS 

################################################################################ 

def hLsarGetUserName(dce, userName = NULL, domainName = NULL): 

request = LsarGetUserName() 

request['SystemName'] = NULL 

request['UserName'] = userName 

request['DomainName'] = domainName 

return dce.request(request) 

 

def hLsarLookupNames4(dce, names, lookupLevel = LSAP_LOOKUP_LEVEL.LsapLookupWksta, lookupOptions=0x00000000, clientRevision=0x00000001): 

request = LsarLookupNames4() 

request['Count'] = len(names) 

for name in names: 

itemn = RPC_UNICODE_STRING() 

itemn['Data'] = name 

request['Names'].append(itemn) 

request['TranslatedSids']['Sids'] = NULL 

request['LookupLevel'] = lookupLevel 

request['LookupOptions'] = lookupOptions 

request['ClientRevision'] = clientRevision 

 

return dce.request(request) 

 

def hLsarLookupNames3(dce, policyHandle, names, lookupLevel = LSAP_LOOKUP_LEVEL.LsapLookupWksta, lookupOptions=0x00000000, clientRevision=0x00000001): 

request = LsarLookupNames3() 

request['PolicyHandle'] = policyHandle 

request['Count'] = len(names) 

for name in names: 

itemn = RPC_UNICODE_STRING() 

itemn['Data'] = name 

request['Names'].append(itemn) 

request['TranslatedSids']['Sids'] = NULL 

request['LookupLevel'] = lookupLevel 

request['LookupOptions'] = lookupOptions 

request['ClientRevision'] = clientRevision 

 

return dce.request(request) 

 

def hLsarLookupNames2(dce, policyHandle, names, lookupLevel = LSAP_LOOKUP_LEVEL.LsapLookupWksta, lookupOptions=0x00000000, clientRevision=0x00000001): 

request = LsarLookupNames2() 

request['PolicyHandle'] = policyHandle 

request['Count'] = len(names) 

for name in names: 

itemn = RPC_UNICODE_STRING() 

itemn['Data'] = name 

request['Names'].append(itemn) 

request['TranslatedSids']['Sids'] = NULL 

request['LookupLevel'] = lookupLevel 

request['LookupOptions'] = lookupOptions 

request['ClientRevision'] = clientRevision 

 

return dce.request(request) 

 

def hLsarLookupNames(dce, policyHandle, names, lookupLevel = LSAP_LOOKUP_LEVEL.LsapLookupWksta): 

request = LsarLookupNames() 

request['PolicyHandle'] = policyHandle 

request['Count'] = len(names) 

for name in names: 

itemn = RPC_UNICODE_STRING() 

itemn['Data'] = name 

request['Names'].append(itemn) 

request['TranslatedSids']['Sids'] = NULL 

request['LookupLevel'] = lookupLevel 

 

return dce.request(request) 

 

def hLsarLookupSids2(dce, policyHandle, sids, lookupLevel = LSAP_LOOKUP_LEVEL.LsapLookupWksta, lookupOptions=0x00000000, clientRevision=0x00000001): 

request = LsarLookupSids2() 

request['PolicyHandle'] = policyHandle 

request['SidEnumBuffer']['Entries'] = len(sids) 

for sid in sids: 

itemn = LSAPR_SID_INFORMATION() 

itemn['Sid'].fromCanonical(sid) 

request['SidEnumBuffer']['SidInfo'].append(itemn) 

 

request['TranslatedNames']['Names'] = NULL 

request['LookupLevel'] = lookupLevel 

request['LookupOptions'] = lookupOptions 

request['ClientRevision'] = clientRevision 

 

return dce.request(request) 

 

def hLsarLookupSids(dce, policyHandle, sids, lookupLevel = LSAP_LOOKUP_LEVEL.LsapLookupWksta): 

request = LsarLookupSids() 

request['PolicyHandle'] = policyHandle 

request['SidEnumBuffer']['Entries'] = len(sids) 

for sid in sids: 

itemn = LSAPR_SID_INFORMATION() 

itemn['Sid'].fromCanonical(sid) 

request['SidEnumBuffer']['SidInfo'].append(itemn) 

 

request['TranslatedNames']['Names'] = NULL 

request['LookupLevel'] = lookupLevel 

 

return dce.request(request)