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.compat import text_type
  39 from samba.dcerpc.windows_event_ids import EVT_ID_SUCCESSFUL_LOGON
  40
  41
  42 class AuthLogTestsSamLogon(samba.tests.auth_log_base.AuthLogTestBase):
  43
  44     def setUp(self):
  45         super(AuthLogTestsSamLogon, self).setUp()
  46         self.lp      = samba.tests.env_loadparm()
  47         self.creds   = Credentials()
  48
  49         self.session = system_session()
  50         self.ldb = SamDB(
  51             session_info=self.session,
  52             credentials=self.creds,
  53             lp=self.lp)
  54
  55         self.domain        = os.environ["DOMAIN"]
  56         self.netbios_name  = "SamLogonTest"
  57         self.machinepass   = "abcdefghij"
  58         self.remoteAddress = AS_SYSTEM_MAGIC_PATH_TOKEN
  59         self.base_dn       = self.ldb.domain_dn()
  60         self.samlogon_dn   = ("cn=%s,cn=users,%s" %
  61                               (self.netbios_name, self.base_dn))
  62
  63     def tearDown(self):
  64         super(AuthLogTestsSamLogon, self).tearDown()
  65         delete_force(self.ldb, self.samlogon_dn)
  66
  67     def _test_samlogon(self, binding, creds, checkFunction):
  68
  69         def isLastExpectedMessage(msg):
  70             return (
  71                 msg["type"] == "Authentication" and
  72                 msg["Authentication"]["serviceDescription"]  == "SamLogon" and
  73                 msg["Authentication"]["authDescription"]     == "network" and
  74                 msg["Authentication"]["passwordType"]        == "NTLMv2" and
  75                 msg["Authentication"]["eventId"] == EVT_ID_SUCCESSFUL_LOGON)
  76
  77         if binding:
  78             binding = "[schannel,%s]" % binding
  79         else:
  80             binding = "[schannel]"
  81
  82         utf16pw = text_type('"' + self.machinepass + '"').encode('utf-16-le')
  83         self.ldb.add({
  84             "dn": self.samlogon_dn,
  85             "objectclass": "computer",
  86             "sAMAccountName": "%s$" % self.netbios_name,
  87             "userAccountControl":
  88                 str(UF_WORKSTATION_TRUST_ACCOUNT | UF_PASSWD_NOTREQD),
  89             "unicodePwd": utf16pw})
  90
  91         machine_creds = Credentials()
  92         machine_creds.guess(self.get_loadparm())
  93         machine_creds.set_secure_channel_type(SEC_CHAN_WKSTA)
  94         machine_creds.set_password(self.machinepass)
  95         machine_creds.set_username(self.netbios_name + "$")
  96
  97         netlogon_conn = netlogon.netlogon("ncalrpc:%s" % binding,
  98                                           self.get_loadparm(),
  99                                           machine_creds)
 100         challenge = b"abcdefgh"
 101
 102         target_info = ntlmssp.AV_PAIR_LIST()
 103         target_info.count = 3
 104
 105         domainname = ntlmssp.AV_PAIR()
 106         domainname.AvId = ntlmssp.MsvAvNbDomainName
 107         domainname.Value = self.domain
 108
 109         computername = ntlmssp.AV_PAIR()
 110         computername.AvId = ntlmssp.MsvAvNbComputerName
 111         computername.Value = self.netbios_name
 112
 113         eol = ntlmssp.AV_PAIR()
 114         eol.AvId = ntlmssp.MsvAvEOL
 115         target_info.pair = [domainname, computername, eol]
 116
 117         target_info_blob = ndr_pack(target_info)
 118
 119         response = creds.get_ntlm_response(flags=CLI_CRED_NTLMv2_AUTH,
 120                                            challenge=challenge,
 121                                            target_info=target_info_blob)
 122
 123         netr_flags = 0
 124
 125         logon_level = netlogon.NetlogonNetworkTransitiveInformation
 126         logon = samba.dcerpc.netlogon.netr_NetworkInfo()
 127
 128         logon.challenge = [x if isinstance(x,int) else ord(x) for x in challenge]
 129         logon.nt = netlogon.netr_ChallengeResponse()
 130         logon.nt.length = len(response["nt_response"])
 131         logon.nt.data = [x if isinstance(x,int) else ord(x) for x in response["nt_response"]]
 132         logon.identity_info = samba.dcerpc.netlogon.netr_IdentityInfo()
 133         (username, domain) = creds.get_ntlm_username_domain()
 134
 135         logon.identity_info.domain_name.string = domain
 136         logon.identity_info.account_name.string = username
 137         logon.identity_info.workstation.string = creds.get_workstation()
 138
 139         validation_level = samba.dcerpc.netlogon.NetlogonValidationSamInfo4
 140
 141         result = netlogon_conn.netr_LogonSamLogonEx(
 142             os.environ["SERVER"],
 143             machine_creds.get_workstation(),
 144             logon_level, logon,
 145             validation_level, netr_flags)
 146
 147         (validation, authoritative, netr_flags_out) = result
 148
 149         messages = self.waitForMessages(isLastExpectedMessage, netlogon_conn)
 150         checkFunction(messages)
 151
 152     def samlogon_check(self, messages):
 153
 154         messages = self.remove_netlogon_messages(messages)
 155         expected_messages = 5
 156         self.assertEquals(expected_messages,
 157                           len(messages),
 158                           "Did not receive the expected number of messages")
 159
 160         # Check the first message it should be an Authorization
 161         msg = messages[0]
 162         self.assertEquals("Authorization", msg["type"])
 163         self.assertEquals("DCE/RPC",
 164                           msg["Authorization"]["serviceDescription"])
 165         self.assertEquals("ncalrpc", msg["Authorization"]["authType"])
 166         self.assertEquals("NONE", msg["Authorization"]["transportProtection"])
 167         self.assertTrue(self.is_guid(msg["Authorization"]["sessionId"]))
 168
 169     def test_ncalrpc_samlogon(self):
 170
 171         creds = self.insta_creds(template=self.get_credentials(),
 172                                  kerberos_state=DONT_USE_KERBEROS)
 173         try:
 174             self._test_samlogon("SEAL", creds, self.samlogon_check)
 175         except Exception as e:
 176             self.fail("Unexpected exception: " + str(e))