python/samba/netcmd/domain/level.py

   1 # domain management - domain level
   2 #
   3 # Copyright Matthias Dieter Wallnoefer 2009
   4 # Copyright Andrew Kroeger 2009
   5 # Copyright Jelmer Vernooij 2007-2012
   6 # Copyright Giampaolo Lauria 2011
   7 # Copyright Matthieu Patou <mat@matws.net> 2011
   8 # Copyright Andrew Bartlett 2008-2015
   9 # Copyright Stefan Metzmacher 2012
  10 #
  11 # This program is free software; you can redistribute it and/or modify
  12 # it under the terms of the GNU General Public License as published by
  13 # the Free Software Foundation; either version 3 of the License, or
  14 # (at your option) any later version.
  15 #
  16 # This program is distributed in the hope that it will be useful,
  17 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  18 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19 # GNU General Public License for more details.
  20 #
  21 # You should have received a copy of the GNU General Public License
  22 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  23 #
  24
  25 import ldb
  26 import samba.getopt as options
  27 from samba.auth import system_session
  28 from samba.dsdb import check_and_update_fl, DS_DOMAIN_FUNCTION_2000
  29 from samba.netcmd import Command, CommandError, Option
  30 from samba.samdb import SamDB
  31
  32 from samba import functional_level
  33
  34
  35 class cmd_domain_level(Command):
  36     """Raise domain and forest function levels."""
  37
  38     synopsis = "%prog (show|raise <options>) [options]"
  39
  40     takes_optiongroups = {
  41         "sambaopts": options.SambaOptions,
  42         "credopts": options.CredentialsOptions,
  43         "versionopts": options.VersionOptions,
  44     }
  45
  46     takes_options = [
  47         Option("-H", "--URL", help="LDB URL for database or target server", type=str,
  48                metavar="URL", dest="H"),
  49         Option("-q", "--quiet", help="Be quiet", action="store_true"),  # unused
  50         Option("--forest-level", type="choice", choices=["2003", "2008", "2008_R2", "2012", "2012_R2", "2016"],
  51                help="The forest function level (2003 | 2008 | 2008_R2 | 2012 | 2012_R2 | 2016)"),
  52         Option("--domain-level", type="choice", choices=["2003", "2008", "2008_R2", "2012", "2012_R2", "2016"],
  53                help="The domain function level (2003 | 2008 | 2008_R2 | 2012 | 2012_R2 | 2016)")
  54     ]
  55
  56     takes_args = ["subcommand"]
  57
  58     def run(self, subcommand, H=None, forest_level=None, domain_level=None,
  59             quiet=False, credopts=None, sambaopts=None, versionopts=None):
  60         if subcommand not in ["show", "raise"]:
  61             raise CommandError("invalid argument: '%s' (choose from 'show', 'raise')" % subcommand)
  62
  63         lp = sambaopts.get_loadparm()
  64         creds = credopts.get_credentials(lp, fallback_machine=True)
  65
  66         samdb = SamDB(url=H, session_info=system_session(),
  67                       credentials=creds, lp=lp)
  68
  69         domain_dn = samdb.domain_dn()
  70
  71         in_transaction = False
  72         if subcommand == "raise" and not H.startswith("ldap"):
  73             samdb.transaction_start()
  74             in_transaction = True
  75             try:
  76                 check_and_update_fl(samdb, lp)
  77             except Exception as e:
  78                 samdb.transaction_cancel()
  79                 raise e
  80
  81         try:
  82             res_forest = samdb.search("CN=Partitions,%s" % samdb.get_config_basedn(),
  83                                       scope=ldb.SCOPE_BASE, attrs=["msDS-Behavior-Version"])
  84             assert len(res_forest) == 1
  85
  86             res_domain = samdb.search(domain_dn, scope=ldb.SCOPE_BASE,
  87                                       attrs=["msDS-Behavior-Version", "nTMixedDomain"])
  88             assert len(res_domain) == 1
  89
  90             res_domain_cross = samdb.search("CN=Partitions,%s" % samdb.get_config_basedn(),
  91                                             scope=ldb.SCOPE_SUBTREE,
  92                                             expression="(&(objectClass=crossRef)(nCName=%s))" % domain_dn,
  93                                             attrs=["msDS-Behavior-Version"])
  94             assert len(res_domain_cross) == 1
  95
  96             res_dc_s = samdb.search("CN=Sites,%s" % samdb.get_config_basedn(),
  97                                     scope=ldb.SCOPE_SUBTREE, expression="(objectClass=nTDSDSA)",
  98                                     attrs=["msDS-Behavior-Version"])
  99             assert len(res_dc_s) >= 1
 100
 101             # default values, since "msDS-Behavior-Version" does not exist on Windows 2000 AD
 102             level_forest = DS_DOMAIN_FUNCTION_2000
 103             level_domain = DS_DOMAIN_FUNCTION_2000
 104
 105             if "msDS-Behavior-Version" in res_forest[0]:
 106                 level_forest = int(res_forest[0]["msDS-Behavior-Version"][0])
 107             if "msDS-Behavior-Version" in res_domain[0]:
 108                 level_domain = int(res_domain[0]["msDS-Behavior-Version"][0])
 109             level_domain_mixed = int(res_domain[0]["nTMixedDomain"][0])
 110
 111             min_level_dc = None
 112             for msg in res_dc_s:
 113                 if "msDS-Behavior-Version" in msg:
 114                     if min_level_dc is None or int(msg["msDS-Behavior-Version"][0]) < min_level_dc:
 115                         min_level_dc = int(msg["msDS-Behavior-Version"][0])
 116                 else:
 117                     min_level_dc = DS_DOMAIN_FUNCTION_2000
 118                     # well, this is the least
 119                     break
 120
 121             if level_forest < DS_DOMAIN_FUNCTION_2000 or level_domain < DS_DOMAIN_FUNCTION_2000:
 122                 raise CommandError("Domain and/or forest function level(s) is/are invalid. Correct them or reprovision!")
 123             if min_level_dc < DS_DOMAIN_FUNCTION_2000:
 124                 raise CommandError("Lowest function level of a DC is invalid. Correct this or reprovision!")
 125             if level_forest > level_domain:
 126                 raise CommandError("Forest function level is higher than the domain level(s). Correct this or reprovision!")
 127             if level_domain > min_level_dc:
 128                 raise CommandError("Domain function level is higher than the lowest function level of a DC. Correct this or reprovision!")
 129         except Exception as e:
 130             if in_transaction:
 131                 samdb.transaction_cancel()
 132             raise e
 133
 134         def do_show():
 135             self.message("Domain and forest function level for domain '%s'" % domain_dn)
 136             if level_forest == DS_DOMAIN_FUNCTION_2000 and level_domain_mixed != 0:
 137                 self.message("\nATTENTION: You run SAMBA 4 on a forest function level lower than Windows 2000 (Native). This isn't supported! Please raise!")
 138             if level_domain == DS_DOMAIN_FUNCTION_2000 and level_domain_mixed != 0:
 139                 self.message("\nATTENTION: You run SAMBA 4 on a domain function level lower than Windows 2000 (Native). This isn't supported! Please raise!")
 140             if min_level_dc == DS_DOMAIN_FUNCTION_2000 and level_domain_mixed != 0:
 141                 self.message("\nATTENTION: You run SAMBA 4 on a lowest function level of a DC lower than Windows 2003. This isn't supported! Please step-up or upgrade the concerning DC(s)!")
 142
 143             self.message("")
 144
 145             outstr = functional_level.level_to_string(level_forest)
 146             self.message("Forest function level: (Windows) " + outstr)
 147
 148             if level_domain == DS_DOMAIN_FUNCTION_2000 and level_domain_mixed:
 149                 outstr = "2000 mixed (NT4 DC support)"
 150             else:
 151                 outstr = functional_level.level_to_string(level_domain)
 152             self.message("Domain function level: (Windows) " + outstr)
 153
 154             outstr = functional_level.level_to_string(min_level_dc)
 155             self.message("Lowest function level of a DC: (Windows) " + outstr)
 156             return
 157
 158         def do_raise():
 159             msgs = []
 160
 161             current_level_domain = level_domain
 162
 163             if domain_level is not None:
 164                 try:
 165                     new_level_domain = functional_level.string_to_level(domain_level)
 166                 except KeyError:
 167                     raise CommandError(f"New functional level '{domain_level}' is not known to Samba as an AD functional level")
 168
 169                 if new_level_domain <= level_domain and level_domain_mixed == 0:
 170                     raise CommandError("Domain function level can't be smaller than or equal to the actual one!")
 171                 if new_level_domain > min_level_dc:
 172                     raise CommandError("Domain function level can't be higher than the lowest function level of a DC!")
 173
 174                 # Deactivate mixed/interim domain support
 175                 if level_domain_mixed != 0:
 176                     # Directly on the base DN
 177                     m = ldb.Message()
 178                     m.dn = ldb.Dn(samdb, domain_dn)
 179                     m["nTMixedDomain"] = ldb.MessageElement("0",
 180                                                             ldb.FLAG_MOD_REPLACE, "nTMixedDomain")
 181                     samdb.modify(m)
 182                     # Under partitions
 183                     m = ldb.Message()
 184                     m.dn = res_domain_cross[0].dn
 185                     m["nTMixedDomain"] = ldb.MessageElement("0",
 186                                                             ldb.FLAG_MOD_REPLACE, "nTMixedDomain")
 187                     try:
 188                         samdb.modify(m)
 189                     except ldb.LdbError as e:
 190                         (enum, emsg) = e.args
 191                         if enum != ldb.ERR_UNWILLING_TO_PERFORM:
 192                             raise
 193
 194                 # Directly on the base DN
 195                 m = ldb.Message()
 196                 m.dn = ldb.Dn(samdb, domain_dn)
 197                 m["msDS-Behavior-Version"] = ldb.MessageElement(
 198                     str(new_level_domain), ldb.FLAG_MOD_REPLACE,
 199                     "msDS-Behavior-Version")
 200                 samdb.modify(m)
 201                 # Under partitions
 202                 m = ldb.Message()
 203                 m.dn = res_domain_cross[0].dn
 204                 m["msDS-Behavior-Version"] = ldb.MessageElement(
 205                     str(new_level_domain), ldb.FLAG_MOD_REPLACE,
 206                     "msDS-Behavior-Version")
 207                 try:
 208                     samdb.modify(m)
 209                 except ldb.LdbError as e2:
 210                     (enum, emsg) = e2.args
 211                     if enum != ldb.ERR_UNWILLING_TO_PERFORM:
 212                         raise
 213
 214                 current_level_domain = new_level_domain
 215                 msgs.append("Domain function level changed!")
 216
 217             if forest_level is not None:
 218                 new_level_forest = functional_level.string_to_level(forest_level)
 219
 220                 if new_level_forest <= level_forest:
 221                     raise CommandError("Forest function level can't be smaller than or equal to the actual one!")
 222                 if new_level_forest > current_level_domain:
 223                     raise CommandError("Forest function level can't be higher than the domain function level(s). Please raise it/them first!")
 224
 225                 m = ldb.Message()
 226                 m.dn = ldb.Dn(samdb, "CN=Partitions,%s" % samdb.get_config_basedn())
 227                 m["msDS-Behavior-Version"] = ldb.MessageElement(
 228                     str(new_level_forest), ldb.FLAG_MOD_REPLACE,
 229                     "msDS-Behavior-Version")
 230                 samdb.modify(m)
 231                 msgs.append("Forest function level changed!")
 232             msgs.append("All changes applied successfully!")
 233             self.message("\n".join(msgs))
 234             return
 235
 236         if subcommand == "show":
 237             assert not in_transaction
 238             do_show()
 239             return
 240         elif subcommand == "raise":
 241             try:
 242                 do_raise()
 243             except Exception as e:
 244                 if in_transaction:
 245                     samdb.transaction_cancel()
 246                 raise e
 247             if in_transaction:
 248                 samdb.transaction_commit()
 249             return
 250
 251         raise AssertionError("Internal Error subcommand[%s] not handled" % subcommand)