python/samba/tests/auth_log_samlogon.py

   1 # Unix SMB/CIFS implementation.
   2 # Copyright (C) Andrew Bartlett <abartlet@samba.org> 2017
   3 #
   4 # This program is free software; you can redistribute it and/or modify
   5 # it under the terms of the GNU General Public License as published by
   6 # the Free Software Foundation; either version 3 of the License, or
   7 # (at your option) any later version.
   8 #
   9 # This program is distributed in the hope that it will be useful,
  10 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 # GNU General Public License for more details.
  13 #
  14 # You should have received a copy of the GNU General Public License
  15 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16 #
  17
  18 """
  19     Tests auth logging tests that exercise SamLogon
  20 """
  21
  22 import samba.tests
  23 import os
  24 from samba.samdb import SamDB
  25 import samba.tests.auth_log_base
  26 from samba.credentials import (
  27     Credentials,
  28     DONT_USE_KERBEROS,
  29     CLI_CRED_NTLMv2_AUTH
  30 )
  31 from samba.dcerpc import ntlmssp, netlogon
  32 from samba.dcerpc.dcerpc import AS_SYSTEM_MAGIC_PATH_TOKEN
  33 from samba.ndr import ndr_pack
  34 from samba.auth import system_session
  35 from samba.tests import delete_force
  36 from samba.dsdb import UF_WORKSTATION_TRUST_ACCOUNT, UF_PASSWD_NOTREQD
  37 from samba.dcerpc.misc import SEC_CHAN_WKSTA
  38 from samba.dcerpc.windows_event_ids import (
  39     EVT_ID_SUCCESSFUL_LOGON,
  40     EVT_LOGON_NETWORK
  41 )
  42
  43
  44 class AuthLogTestsSamLogon(samba.tests.auth_log_base.AuthLogTestBase):
  45
  46     def setUp(self):
  47         super(AuthLogTestsSamLogon, self).setUp()
  48         self.lp = samba.tests.env_loadparm()
  49         self.session = system_session()
  50         self.ldb = SamDB(
  51             session_info=self.session,
  52             lp=self.lp)
  53
  54         self.domain = os.environ["DOMAIN"]
  55         self.netbios_name = "SamLogonTest"
  56         self.machinepass = "abcdefghij"
  57         self.remoteAddress = AS_SYSTEM_MAGIC_PATH_TOKEN
  58         self.base_dn = self.ldb.domain_dn()
  59         self.samlogon_dn = ("cn=%s,cn=users,%s" %
  60                            (self.netbios_name, self.base_dn))
  61
  62     def tearDown(self):
  63         super(AuthLogTestsSamLogon, self).tearDown()
  64         delete_force(self.ldb, self.samlogon_dn)
  65
  66     def _test_samlogon(self, binding, creds, checkFunction):
  67
  68         def isLastExpectedMessage(msg):
  69             return (
  70                 msg["type"] == "Authentication" and
  71                 msg["Authentication"]["serviceDescription"] == "SamLogon" and
  72                 msg["Authentication"]["authDescription"] == "network" and
  73                 msg["Authentication"]["passwordType"] == "NTLMv2" and
  74                 (msg["Authentication"]["eventId"] ==
  75                     EVT_ID_SUCCESSFUL_LOGON) and
  76                 (msg["Authentication"]["logonType"] == EVT_LOGON_NETWORK))
  77
  78         if binding:
  79             binding = "[schannel,%s]" % binding
  80         else:
  81             binding = "[schannel]"
  82
  83         utf16pw = ('"' + self.machinepass + '"').encode('utf-16-le')
  84         self.ldb.add({
  85             "dn": self.samlogon_dn,
  86             "objectclass": "computer",
  87             "sAMAccountName": "%s$" % self.netbios_name,
  88             "userAccountControl":
  89                 str(UF_WORKSTATION_TRUST_ACCOUNT | UF_PASSWD_NOTREQD),
  90             "unicodePwd": utf16pw})
  91
  92         machine_creds = Credentials()
  93         machine_creds.guess(self.get_loadparm())
  94         machine_creds.set_secure_channel_type(SEC_CHAN_WKSTA)
  95         machine_creds.set_password(self.machinepass)
  96         machine_creds.set_username(self.netbios_name + "$")
  97
  98         netlogon_conn = netlogon.netlogon("ncalrpc:%s" % binding,
  99                                           self.get_loadparm(),
 100                                           machine_creds)
 101         challenge = b"abcdefgh"
 102
 103         target_info = ntlmssp.AV_PAIR_LIST()
 104         target_info.count = 3
 105
 106         domainname = ntlmssp.AV_PAIR()
 107         domainname.AvId = ntlmssp.MsvAvNbDomainName
 108         domainname.Value = self.domain
 109
 110         computername = ntlmssp.AV_PAIR()
 111         computername.AvId = ntlmssp.MsvAvNbComputerName
 112         computername.Value = self.netbios_name
 113
 114         eol = ntlmssp.AV_PAIR()
 115         eol.AvId = ntlmssp.MsvAvEOL
 116         target_info.pair = [domainname, computername, eol]
 117
 118         target_info_blob = ndr_pack(target_info)
 119
 120         response = creds.get_ntlm_response(flags=CLI_CRED_NTLMv2_AUTH,
 121                                            challenge=challenge,
 122                                            target_info=target_info_blob)
 123
 124         netr_flags = 0
 125
 126         logon_level = netlogon.NetlogonNetworkTransitiveInformation
 127         logon = samba.dcerpc.netlogon.netr_NetworkInfo()
 128
 129         logon.challenge = [
 130             x if isinstance(x, int) else ord(x) for x in challenge]
 131         logon.nt = netlogon.netr_ChallengeResponse()
 132         logon.nt.length = len(response["nt_response"])
 133         logon.nt.data = [
 134             x if isinstance(x, int) else ord(x) for
 135             x in response["nt_response"]
 136         ]
 137         logon.identity_info = samba.dcerpc.netlogon.netr_IdentityInfo()
 138         (username, domain) = creds.get_ntlm_username_domain()
 139
 140         logon.identity_info.domain_name.string = domain
 141         logon.identity_info.account_name.string = username
 142         logon.identity_info.workstation.string = creds.get_workstation()
 143
 144         validation_level = samba.dcerpc.netlogon.NetlogonValidationSamInfo4
 145
 146         result = netlogon_conn.netr_LogonSamLogonEx(
 147             os.environ["SERVER"],
 148             machine_creds.get_workstation(),
 149             logon_level, logon,
 150             validation_level, netr_flags)
 151
 152         (validation, authoritative, netr_flags_out) = result
 153
 154         messages = self.waitForMessages(isLastExpectedMessage, netlogon_conn)
 155         checkFunction(messages)
 156
 157     def samlogon_check(self, messages):
 158
 159         messages = self.remove_netlogon_messages(messages)
 160         expected_messages = 5
 161         self.assertEqual(expected_messages,
 162                           len(messages),
 163                           "Did not receive the expected number of messages")
 164
 165         # Check the first message it should be an Authorization
 166         msg = messages[0]
 167         self.assertEqual("Authorization", msg["type"])
 168         self.assertEqual("DCE/RPC",
 169                           msg["Authorization"]["serviceDescription"])
 170         self.assertEqual("ncalrpc", msg["Authorization"]["authType"])
 171         self.assertEqual("NONE", msg["Authorization"]["transportProtection"])
 172         self.assertTrue(self.is_guid(msg["Authorization"]["sessionId"]))
 173
 174     def test_ncalrpc_samlogon(self):
 175
 176         creds = self.insta_creds(template=self.get_credentials(),
 177                                  kerberos_state=DONT_USE_KERBEROS)
 178         try:
 179             self._test_samlogon("SEAL", creds, self.samlogon_check)
 180         except Exception as e:
 181             self.fail("Unexpected exception: " + str(e))