source4/scripting/python/samba/dbchecker.py

   1 # Samba4 AD database checker
   2 #
   3 # Copyright (C) Andrew Tridgell 2011
   4 # Copyright (C) Matthieu Patou <mat@matws.net> 2011
   5 #
   6 # This program is free software; you can redistribute it and/or modify
   7 # it under the terms of the GNU General Public License as published by
   8 # the Free Software Foundation; either version 3 of the License, or
   9 # (at your option) any later version.
  10 #
  11 # This program is distributed in the hope that it will be useful,
  12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 # GNU General Public License for more details.
  15 #
  16 # You should have received a copy of the GNU General Public License
  17 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18 #
  19
  20 import ldb
  21 from samba import dsdb
  22 from samba import common
  23 from samba.dcerpc import misc
  24 from samba.ndr import ndr_unpack, ndr_pack
  25 from samba.dcerpc import drsblobs
  26 from samba.common import dsdb_Dn
  27 from samba.dcerpc import security
  28
  29
  30 class dbcheck(object):
  31     """check a SAM database for errors"""
  32
  33     def __init__(self, samdb, samdb_schema=None, verbose=False, fix=False,
  34                  yes=False, quiet=False, in_transaction=False):
  35         self.samdb = samdb
  36         self.dict_oid_name = None
  37         self.samdb_schema = (samdb_schema or samdb)
  38         self.verbose = verbose
  39         self.fix = fix
  40         self.yes = yes
  41         self.quiet = quiet
  42         self.remove_all_unknown_attributes = False
  43         self.remove_all_empty_attributes = False
  44         self.fix_all_normalisation = False
  45         self.fix_all_DN_GUIDs = False
  46         self.remove_all_deleted_DN_links = False
  47         self.fix_all_target_mismatch = False
  48         self.fix_all_metadata = False
  49         self.fix_time_metadata = False
  50         self.fix_all_missing_backlinks = False
  51         self.fix_all_orphaned_backlinks = False
  52         self.fix_rmd_flags = False
  53         self.fix_ntsecuritydescriptor = False
  54         self.seize_fsmo_role = False
  55         self.move_to_lost_and_found = False
  56         self.fix_instancetype = False
  57         self.in_transaction = in_transaction
  58         self.infrastructure_dn = ldb.Dn(samdb, "CN=Infrastructure," + samdb.domain_dn())
  59         self.naming_dn = ldb.Dn(samdb, "CN=Partitions,%s" % samdb.get_config_basedn())
  60         self.schema_dn = samdb.get_schema_basedn()
  61         self.rid_dn = ldb.Dn(samdb, "CN=RID Manager$,CN=System," + samdb.domain_dn())
  62         self.ntds_dsa = samdb.get_dsServiceName()
  63         self.class_schemaIDGUID = {}
  64
  65         res = self.samdb.search(base=self.ntds_dsa, scope=ldb.SCOPE_BASE, attrs=['msDS-hasMasterNCs', 'hasMasterNCs'])
  66         if "msDS-hasMasterNCs" in res[0]:
  67             self.write_ncs = res[0]["msDS-hasMasterNCs"]
  68         else:
  69             # If the Forest Level is less than 2003 then there is no
  70             # msDS-hasMasterNCs, so we fall back to hasMasterNCs
  71             # no need to merge as all the NCs that are in hasMasterNCs must
  72             # also be in msDS-hasMasterNCs (but not the opposite)
  73             if "hasMasterNCs" in res[0]:
  74                 self.write_ncs = res[0]["hasMasterNCs"]
  75             else:
  76                 self.write_ncs = None
  77
  78
  79     def check_database(self, DN=None, scope=ldb.SCOPE_SUBTREE, controls=[], attrs=['*']):
  80         '''perform a database check, returning the number of errors found'''
  81
  82         res = self.samdb.search(base=DN, scope=scope, attrs=['dn'], controls=controls)
  83         self.report('Checking %u objects' % len(res))
  84         error_count = 0
  85
  86         for object in res:
  87             error_count += self.check_object(object.dn, attrs=attrs)
  88
  89         if DN is None:
  90             error_count += self.check_rootdse()
  91
  92         if error_count != 0 and not self.fix:
  93             self.report("Please use --fix to fix these errors")
  94
  95         self.report('Checked %u objects (%u errors)' % (len(res), error_count))
  96         return error_count
  97
  98     def report(self, msg):
  99         '''print a message unless quiet is set'''
 100         if not self.quiet:
 101             print(msg)
 102
 103     def confirm(self, msg, allow_all=False, forced=False):
 104         '''confirm a change'''
 105         if not self.fix:
 106             return False
 107         if self.quiet:
 108             return self.yes
 109         if self.yes:
 110             forced = True
 111         return common.confirm(msg, forced=forced, allow_all=allow_all)
 112
 113     ################################################################
 114     # a local confirm function with support for 'all'
 115     def confirm_all(self, msg, all_attr):
 116         '''confirm a change with support for "all" '''
 117         if not self.fix:
 118             return False
 119         if self.quiet:
 120             return self.yes
 121         if getattr(self, all_attr) == 'NONE':
 122             return False
 123         if getattr(self, all_attr) == 'ALL':
 124             forced = True
 125         else:
 126             forced = self.yes
 127         c = common.confirm(msg, forced=forced, allow_all=True)
 128         if c == 'ALL':
 129             setattr(self, all_attr, 'ALL')
 130             return True
 131         if c == 'NONE':
 132             setattr(self, all_attr, 'NONE')
 133             return False
 134         return c
 135
 136     def do_modify(self, m, controls, msg, validate=True):
 137         '''perform a modify with optional verbose output'''
 138         if self.verbose:
 139             self.report(self.samdb.write_ldif(m, ldb.CHANGETYPE_MODIFY))
 140         try:
 141             controls = controls + ["local_oid:%s:0" % dsdb.DSDB_CONTROL_DBCHECK]
 142             self.samdb.modify(m, controls=controls, validate=validate)
 143         except Exception, err:
 144             self.report("%s : %s" % (msg, err))
 145             return False
 146         return True
 147
 148     def do_rename(self, from_dn, to_rdn, to_base, controls, msg):
 149         '''perform a modify with optional verbose output'''
 150         if self.verbose:
 151             self.report("""dn: %s
 152 changeType: modrdn
 153 newrdn: %s
 154 deleteOldRdn: 1
 155 newSuperior: %s""" % (str(from_dn), str(to_rdn), str(to_base)))
 156         try:
 157             to_dn = to_rdn + to_base
 158             controls = controls + ["local_oid:%s:0" % dsdb.DSDB_CONTROL_DBCHECK]
 159             self.samdb.rename(from_dn, to_dn, controls=controls)
 160         except Exception, err:
 161             self.report("%s : %s" % (msg, err))
 162             return False
 163         return True
 164
 165     def err_empty_attribute(self, dn, attrname):
 166         '''fix empty attributes'''
 167         self.report("ERROR: Empty attribute %s in %s" % (attrname, dn))
 168         if not self.confirm_all('Remove empty attribute %s from %s?' % (attrname, dn), 'remove_all_empty_attributes'):
 169             self.report("Not fixing empty attribute %s" % attrname)
 170             return
 171
 172         m = ldb.Message()
 173         m.dn = dn
 174         m[attrname] = ldb.MessageElement('', ldb.FLAG_MOD_DELETE, attrname)
 175         if self.do_modify(m, ["relax:0", "show_recycled:1"],
 176                           "Failed to remove empty attribute %s" % attrname, validate=False):
 177             self.report("Removed empty attribute %s" % attrname)
 178
 179     def err_normalise_mismatch(self, dn, attrname, values):
 180         '''fix attribute normalisation errors'''
 181         self.report("ERROR: Normalisation error for attribute %s in %s" % (attrname, dn))
 182         mod_list = []
 183         for val in values:
 184             normalised = self.samdb.dsdb_normalise_attributes(
 185                 self.samdb_schema, attrname, [val])
 186             if len(normalised) != 1:
 187                 self.report("Unable to normalise value '%s'" % val)
 188                 mod_list.append((val, ''))
 189             elif (normalised[0] != val):
 190                 self.report("value '%s' should be '%s'" % (val, normalised[0]))
 191                 mod_list.append((val, normalised[0]))
 192         if not self.confirm_all('Fix normalisation for %s from %s?' % (attrname, dn), 'fix_all_normalisation'):
 193             self.report("Not fixing attribute %s" % attrname)
 194             return
 195
 196         m = ldb.Message()
 197         m.dn = dn
 198         for i in range(0, len(mod_list)):
 199             (val, nval) = mod_list[i]
 200             m['value_%u' % i] = ldb.MessageElement(val, ldb.FLAG_MOD_DELETE, attrname)
 201             if nval != '':
 202                 m['normv_%u' % i] = ldb.MessageElement(nval, ldb.FLAG_MOD_ADD,
 203                     attrname)
 204
 205         if self.do_modify(m, ["relax:0", "show_recycled:1"],
 206                           "Failed to normalise attribute %s" % attrname,
 207                           validate=False):
 208             self.report("Normalised attribute %s" % attrname)
 209
 210     def err_normalise_mismatch_replace(self, dn, attrname, values):
 211         '''fix attribute normalisation errors'''
 212         normalised = self.samdb.dsdb_normalise_attributes(self.samdb_schema, attrname, values)
 213         self.report("ERROR: Normalisation error for attribute '%s' in '%s'" % (attrname, dn))
 214         self.report("Values/Order of values do/does not match: %s/%s!" % (values, list(normalised)))
 215         if list(normalised) == values:
 216             return
 217         if not self.confirm_all("Fix normalisation for '%s' from '%s'?" % (attrname, dn), 'fix_all_normalisation'):
 218             self.report("Not fixing attribute '%s'" % attrname)
 219             return
 220
 221         m = ldb.Message()
 222         m.dn = dn
 223         m[attrname] = ldb.MessageElement(normalised, ldb.FLAG_MOD_REPLACE, attrname)
 224
 225         if self.do_modify(m, ["relax:0", "show_recycled:1"],
 226                           "Failed to normalise attribute %s" % attrname,
 227                           validate=False):
 228             self.report("Normalised attribute %s" % attrname)
 229
 230     def is_deleted_objects_dn(self, dsdb_dn):
 231         '''see if a dsdb_Dn is the special Deleted Objects DN'''
 232         return dsdb_dn.prefix == "B:32:18E2EA80684F11D2B9AA00C04F79F805:"
 233
 234     def err_deleted_dn(self, dn, attrname, val, dsdb_dn, correct_dn):
 235         """handle a DN pointing to a deleted object"""
 236         self.report("ERROR: target DN is deleted for %s in object %s - %s" % (attrname, dn, val))
 237         self.report("Target GUID points at deleted DN %s" % correct_dn)
 238         if not self.confirm_all('Remove DN link?', 'remove_all_deleted_DN_links'):
 239             self.report("Not removing")
 240             return
 241         m = ldb.Message()
 242         m.dn = dn
 243         m['old_value'] = ldb.MessageElement(val, ldb.FLAG_MOD_DELETE, attrname)
 244         if self.do_modify(m, ["show_recycled:1", "local_oid:%s:0" % dsdb.DSDB_CONTROL_DBCHECK],
 245                           "Failed to remove deleted DN attribute %s" % attrname):
 246             self.report("Removed deleted DN on attribute %s" % attrname)
 247
 248     def err_missing_dn_GUID(self, dn, attrname, val, dsdb_dn):
 249         """handle a missing target DN (both GUID and DN string form are missing)"""
 250         # check if its a backlink
 251         linkID = self.samdb_schema.get_linkId_from_lDAPDisplayName(attrname)
 252         if (linkID & 1 == 0) and str(dsdb_dn).find('DEL\\0A') == -1:
 253             self.report("Not removing dangling forward link")
 254             return
 255         self.err_deleted_dn(dn, attrname, val, dsdb_dn, dsdb_dn)
 256
 257     def err_incorrect_dn_GUID(self, dn, attrname, val, dsdb_dn, errstr):
 258         """handle a missing GUID extended DN component"""
 259         self.report("ERROR: %s component for %s in object %s - %s" % (errstr, attrname, dn, val))
 260         controls=["extended_dn:1:1", "show_recycled:1"]
 261         try:
 262             res = self.samdb.search(base=str(dsdb_dn.dn), scope=ldb.SCOPE_BASE,
 263                                     attrs=[], controls=controls)
 264         except ldb.LdbError, (enum, estr):
 265             self.report("unable to find object for DN %s - (%s)" % (dsdb_dn.dn, estr))
 266             self.err_missing_dn_GUID(dn, attrname, val, dsdb_dn)
 267             return
 268         if len(res) == 0:
 269             self.report("unable to find object for DN %s" % dsdb_dn.dn)
 270             self.err_missing_dn_GUID(dn, attrname, val, dsdb_dn)
 271             return
 272         dsdb_dn.dn = res[0].dn
 273
 274         if not self.confirm_all('Change DN to %s?' % str(dsdb_dn), 'fix_all_DN_GUIDs'):
 275             self.report("Not fixing %s" % errstr)
 276             return
 277         m = ldb.Message()
 278         m.dn = dn
 279         m['old_value'] = ldb.MessageElement(val, ldb.FLAG_MOD_DELETE, attrname)
 280         m['new_value'] = ldb.MessageElement(str(dsdb_dn), ldb.FLAG_MOD_ADD, attrname)
 281
 282         if self.do_modify(m, ["show_recycled:1"],
 283                           "Failed to fix %s on attribute %s" % (errstr, attrname)):
 284             self.report("Fixed %s on attribute %s" % (errstr, attrname))
 285
 286     def err_dn_target_mismatch(self, dn, attrname, val, dsdb_dn, correct_dn, errstr):
 287         """handle a DN string being incorrect"""
 288         self.report("ERROR: incorrect DN string component for %s in object %s - %s" % (attrname, dn, val))
 289         dsdb_dn.dn = correct_dn
 290
 291         if not self.confirm_all('Change DN to %s?' % str(dsdb_dn), 'fix_all_target_mismatch'):
 292             self.report("Not fixing %s" % errstr)
 293             return
 294         m = ldb.Message()
 295         m.dn = dn
 296         m['old_value'] = ldb.MessageElement(val, ldb.FLAG_MOD_DELETE, attrname)
 297         m['new_value'] = ldb.MessageElement(str(dsdb_dn), ldb.FLAG_MOD_ADD, attrname)
 298         if self.do_modify(m, ["show_recycled:1"],
 299                           "Failed to fix incorrect DN string on attribute %s" % attrname):
 300             self.report("Fixed incorrect DN string on attribute %s" % (attrname))
 301
 302     def err_unknown_attribute(self, obj, attrname):
 303         '''handle an unknown attribute error'''
 304         self.report("ERROR: unknown attribute '%s' in %s" % (attrname, obj.dn))
 305         if not self.confirm_all('Remove unknown attribute %s' % attrname, 'remove_all_unknown_attributes'):
 306             self.report("Not removing %s" % attrname)
 307             return
 308         m = ldb.Message()
 309         m.dn = obj.dn
 310         m['old_value'] = ldb.MessageElement([], ldb.FLAG_MOD_DELETE, attrname)
 311         if self.do_modify(m, ["relax:0", "show_recycled:1"],
 312                           "Failed to remove unknown attribute %s" % attrname):
 313             self.report("Removed unknown attribute %s" % (attrname))
 314
 315     def err_missing_backlink(self, obj, attrname, val, backlink_name, target_dn):
 316         '''handle a missing backlink value'''
 317         self.report("ERROR: missing backlink attribute '%s' in %s for link %s in %s" % (backlink_name, target_dn, attrname, obj.dn))
 318         if not self.confirm_all('Fix missing backlink %s' % backlink_name, 'fix_all_missing_backlinks'):
 319             self.report("Not fixing missing backlink %s" % backlink_name)
 320             return
 321         m = ldb.Message()
 322         m.dn = obj.dn
 323         m['old_value'] = ldb.MessageElement(val, ldb.FLAG_MOD_DELETE, attrname)
 324         m['new_value'] = ldb.MessageElement(val, ldb.FLAG_MOD_ADD, attrname)
 325         if self.do_modify(m, ["show_recycled:1"],
 326                           "Failed to fix missing backlink %s" % backlink_name):
 327             self.report("Fixed missing backlink %s" % (backlink_name))
 328
 329     def err_incorrect_rmd_flags(self, obj, attrname, revealed_dn):
 330         '''handle a incorrect RMD_FLAGS value'''
 331         rmd_flags = int(revealed_dn.dn.get_extended_component("RMD_FLAGS"))
 332         self.report("ERROR: incorrect RMD_FLAGS value %u for attribute '%s' in %s for link %s" % (rmd_flags, attrname, obj.dn, revealed_dn.dn.extended_str()))
 333         if not self.confirm_all('Fix incorrect RMD_FLAGS %u' % rmd_flags, 'fix_rmd_flags'):
 334             self.report("Not fixing incorrect RMD_FLAGS %u" % rmd_flags)
 335             return
 336         m = ldb.Message()
 337         m.dn = obj.dn
 338         m['old_value'] = ldb.MessageElement(str(revealed_dn), ldb.FLAG_MOD_DELETE, attrname)
 339         if self.do_modify(m, ["show_recycled:1", "reveal_internals:0", "show_deleted:0"],
 340                           "Failed to fix incorrect RMD_FLAGS %u" % rmd_flags):
 341             self.report("Fixed incorrect RMD_FLAGS %u" % (rmd_flags))
 342
 343     def err_orphaned_backlink(self, obj, attrname, val, link_name, target_dn):
 344         '''handle a orphaned backlink value'''
 345         self.report("ERROR: orphaned backlink attribute '%s' in %s for link %s in %s" % (attrname, obj.dn, link_name, target_dn))
 346         if not self.confirm_all('Remove orphaned backlink %s' % link_name, 'fix_all_orphaned_backlinks'):
 347             self.report("Not removing orphaned backlink %s" % link_name)
 348             return
 349         m = ldb.Message()
 350         m.dn = obj.dn
 351         m['value'] = ldb.MessageElement(val, ldb.FLAG_MOD_DELETE, attrname)
 352         if self.do_modify(m, ["show_recycled:1", "relax:0"],
 353                           "Failed to fix orphaned backlink %s" % link_name):
 354             self.report("Fixed orphaned backlink %s" % (link_name))
 355
 356     def err_no_fsmoRoleOwner(self, obj):
 357         '''handle a missing fSMORoleOwner'''
 358         self.report("ERROR: fSMORoleOwner not found for role %s" % (obj.dn))
 359         res = self.samdb.search("",
 360                                 scope=ldb.SCOPE_BASE, attrs=["dsServiceName"])
 361         assert len(res) == 1
 362         serviceName = res[0]["dsServiceName"][0]
 363         if not self.confirm_all('Sieze role %s onto current DC by adding fSMORoleOwner=%s' % (obj.dn, serviceName), 'seize_fsmo_role'):
 364             self.report("Not Siezing role %s onto current DC by adding fSMORoleOwner=%s" % (obj.dn, serviceName))
 365             return
 366         m = ldb.Message()
 367         m.dn = obj.dn
 368         m['value'] = ldb.MessageElement(serviceName, ldb.FLAG_MOD_ADD, 'fSMORoleOwner')
 369         if self.do_modify(m, [],
 370                           "Failed to sieze role %s onto current DC by adding fSMORoleOwner=%s" % (obj.dn, serviceName)):
 371             self.report("Siezed role %s onto current DC by adding fSMORoleOwner=%s" % (obj.dn, serviceName))
 372
 373     def err_missing_parent(self, obj):
 374         '''handle a missing parent'''
 375         self.report("ERROR: parent object not found for %s" % (obj.dn))
 376         if not self.confirm_all('Move object %s into LostAndFound?' % (obj.dn), 'move_to_lost_and_found'):
 377             self.report('Not moving object %s into LostAndFound' % (obj.dn))
 378             return
 379
 380         keep_transaction = True
 381         self.samdb.transaction_start()
 382         try:
 383             nc_root = self.samdb.get_nc_root(obj.dn);
 384             lost_and_found = self.samdb.get_wellknown_dn(nc_root, dsdb.DS_GUID_LOSTANDFOUND_CONTAINER)
 385             new_dn = ldb.Dn(self.samdb, str(obj.dn))
 386             new_dn.remove_base_components(len(new_dn) - 1)
 387             if self.do_rename(obj.dn, new_dn, lost_and_found, ["show_deleted:0", "relax:0"],
 388                               "Failed to rename object %s into lostAndFound at %s" % (obj.dn, new_dn + lost_and_found)):
 389                 self.report("Renamed object %s into lostAndFound at %s" % (obj.dn, new_dn + lost_and_found))
 390
 391                 m = ldb.Message()
 392                 m.dn = obj.dn
 393                 m['lastKnownParent'] = ldb.MessageElement(str(obj.dn.parent()), ldb.FLAG_MOD_REPLACE, 'lastKnownParent')
 394
 395                 if self.do_modify(m, [],
 396                                   "Failed to set lastKnownParent on lostAndFound object at %s" % (new_dn + lost_and_found)):
 397                     self.report("Set lastKnownParent on lostAndFound object at %s" % (new_dn + lost_and_found))
 398                     keep_transaction = True
 399         except:
 400             self.samdb.transaction_cancel()
 401             raise
 402
 403         if keep_transaction:
 404             self.samdb.transaction_commit()
 405         else:
 406             self.samdb.transaction_cancel()
 407
 408
 409     def err_wrong_instancetype(self, obj, calculated_instancetype):
 410         '''handle a wrong instanceType'''
 411         self.report("ERROR: wrong instanceType %s on %s, should be %d" % (obj["instanceType"], obj.dn, calculated_instancetype))
 412         if not self.confirm_all('Change instanceType from %s to %d on %s?' % (obj["instanceType"], calculated_instancetype, obj.dn), 'fix_instancetype'):
 413             self.report('Not changing instanceType from %s to %d on %s' % (obj["instanceType"], calculated_instancetype, obj.dn))
 414             return
 415
 416         m = ldb.Message()
 417         m.dn = obj.dn
 418         m['value'] = ldb.MessageElement(str(calculated_instancetype), ldb.FLAG_MOD_REPLACE, 'instanceType')
 419         if self.do_modify(m, ["local_oid:%s:0" % dsdb.DSDB_CONTROL_DBCHECK_MODIFY_RO_REPLICA],
 420                           "Failed to correct missing instanceType on %s by setting instanceType=%d" % (obj.dn, calculated_instancetype)):
 421             self.report("Corrected instancetype on %s by setting instanceType=%d" % (obj.dn, calculated_instancetype))
 422
 423     def find_revealed_link(self, dn, attrname, guid):
 424         '''return a revealed link in an object'''
 425         res = self.samdb.search(base=dn, scope=ldb.SCOPE_BASE, attrs=[attrname],
 426                                 controls=["show_deleted:0", "extended_dn:0", "reveal_internals:0"])
 427         syntax_oid = self.samdb_schema.get_syntax_oid_from_lDAPDisplayName(attrname)
 428         for val in res[0][attrname]:
 429             dsdb_dn = dsdb_Dn(self.samdb, val, syntax_oid)
 430             guid2 = dsdb_dn.dn.get_extended_component("GUID")
 431             if guid == guid2:
 432                 return dsdb_dn
 433         return None
 434
 435     def check_dn(self, obj, attrname, syntax_oid):
 436         '''check a DN attribute for correctness'''
 437         error_count = 0
 438         for val in obj[attrname]:
 439             dsdb_dn = dsdb_Dn(self.samdb, val, syntax_oid)
 440
 441             # all DNs should have a GUID component
 442             guid = dsdb_dn.dn.get_extended_component("GUID")
 443             if guid is None:
 444                 error_count += 1
 445                 self.err_incorrect_dn_GUID(obj.dn, attrname, val, dsdb_dn,
 446                     "missing GUID")
 447                 continue
 448
 449             guidstr = str(misc.GUID(guid))
 450
 451             attrs = ['isDeleted']
 452             linkID = self.samdb_schema.get_linkId_from_lDAPDisplayName(attrname)
 453             reverse_link_name = self.samdb_schema.get_backlink_from_lDAPDisplayName(attrname)
 454             if reverse_link_name is not None:
 455                 attrs.append(reverse_link_name)
 456
 457             # check its the right GUID
 458             try:
 459                 res = self.samdb.search(base="<GUID=%s>" % guidstr, scope=ldb.SCOPE_BASE,
 460                                         attrs=attrs, controls=["extended_dn:1:1", "show_recycled:1"])
 461             except ldb.LdbError, (enum, estr):
 462                 error_count += 1
 463                 self.err_incorrect_dn_GUID(obj.dn, attrname, val, dsdb_dn, "incorrect GUID")
 464                 continue
 465
 466             # now we have two cases - the source object might or might not be deleted
 467             is_deleted = 'isDeleted' in obj and obj['isDeleted'][0].upper() == 'TRUE'
 468             target_is_deleted = 'isDeleted' in res[0] and res[0]['isDeleted'][0].upper() == 'TRUE'
 469
 470             # the target DN is not allowed to be deleted, unless the target DN is the
 471             # special Deleted Objects container
 472             if target_is_deleted and not is_deleted and not self.is_deleted_objects_dn(dsdb_dn):
 473                 error_count += 1
 474                 self.err_deleted_dn(obj.dn, attrname, val, dsdb_dn, res[0].dn)
 475                 continue
 476
 477             # check the DN matches in string form
 478             if res[0].dn.extended_str() != dsdb_dn.dn.extended_str():
 479                 error_count += 1
 480                 self.err_dn_target_mismatch(obj.dn, attrname, val, dsdb_dn,
 481                                             res[0].dn, "incorrect string version of DN")
 482                 continue
 483
 484             if is_deleted and not target_is_deleted and reverse_link_name is not None:
 485                 revealed_dn = self.find_revealed_link(obj.dn, attrname, guid)
 486                 rmd_flags = revealed_dn.dn.get_extended_component("RMD_FLAGS")
 487                 if rmd_flags is not None and (int(rmd_flags) & 1) == 0:
 488                     # the RMD_FLAGS for this link should be 1, as the target is deleted
 489                     self.err_incorrect_rmd_flags(obj, attrname, revealed_dn)
 490                     continue
 491
 492             # check the reverse_link is correct if there should be one
 493             if reverse_link_name is not None:
 494                 match_count = 0
 495                 if reverse_link_name in res[0]:
 496                     for v in res[0][reverse_link_name]:
 497                         if v == obj.dn.extended_str():
 498                             match_count += 1
 499                 if match_count != 1:
 500                     error_count += 1
 501                     if linkID & 1:
 502                         self.err_orphaned_backlink(obj, attrname, val, reverse_link_name, dsdb_dn.dn)
 503                     else:
 504                         self.err_missing_backlink(obj, attrname, val, reverse_link_name, dsdb_dn.dn)
 505                     continue
 506
 507         return error_count
 508
 509
 510     def get_originating_time(self, val, attid):
 511         '''Read metadata properties and return the originating time for
 512            a given attributeId.
 513
 514            :return: the originating time or 0 if not found
 515         '''
 516
 517         repl = ndr_unpack(drsblobs.replPropertyMetaDataBlob, str(val))
 518         obj = repl.ctr
 519
 520         for o in repl.ctr.array:
 521             if o.attid == attid:
 522                 return o.originating_change_time
 523
 524         return 0
 525
 526     def process_metadata(self, val):
 527         '''Read metadata properties and list attributes in it'''
 528
 529         list_att = []
 530
 531         repl = ndr_unpack(drsblobs.replPropertyMetaDataBlob, str(val))
 532         obj = repl.ctr
 533
 534         for o in repl.ctr.array:
 535             att = self.samdb_schema.get_lDAPDisplayName_by_attid(o.attid)
 536             list_att.append(att.lower())
 537
 538         return list_att
 539
 540
 541     def fix_metadata(self, dn, attr):
 542         '''re-write replPropertyMetaData elements for a single attribute for a
 543         object. This is used to fix missing replPropertyMetaData elements'''
 544         res = self.samdb.search(base = dn, scope=ldb.SCOPE_BASE, attrs = [attr],
 545                                 controls = ["search_options:1:2", "show_recycled:1"])
 546         msg = res[0]
 547         nmsg = ldb.Message()
 548         nmsg.dn = dn
 549         nmsg[attr] = ldb.MessageElement(msg[attr], ldb.FLAG_MOD_REPLACE, attr)
 550         if self.do_modify(nmsg, ["relax:0", "provision:0", "show_recycled:1"],
 551                           "Failed to fix metadata for attribute %s" % attr):
 552             self.report("Fixed metadata for attribute %s" % attr)
 553
 554     def ace_get_effective_inherited_type(self, ace):
 555         if ace.flags & security.SEC_ACE_FLAG_INHERIT_ONLY:
 556             return None
 557
 558         check = False
 559         if ace.type == security.SEC_ACE_TYPE_ACCESS_ALLOWED_OBJECT:
 560             check = True
 561         elif ace.type == security.SEC_ACE_TYPE_ACCESS_DENIED_OBJECT:
 562             check = True
 563         elif ace.type == security.SEC_ACE_TYPE_SYSTEM_AUDIT_OBJECT:
 564             check = True
 565         elif ace.type == security.SEC_ACE_TYPE_SYSTEM_ALARM_OBJECT:
 566             check = True
 567
 568         if not check:
 569             return None
 570
 571         if not ace.object.flags & security.SEC_ACE_INHERITED_OBJECT_TYPE_PRESENT:
 572             return None
 573
 574         return str(ace.object.inherited_type)
 575
 576     def lookup_class_schemaIDGUID(self, cls):
 577         if cls in self.class_schemaIDGUID:
 578             return self.class_schemaIDGUID[cls]
 579
 580         flt = "(&(ldapDisplayName=%s)(objectClass=classSchema))" % cls
 581         res = self.samdb.search(base=self.schema_dn,
 582                                 expression=flt,
 583                                 attrs=["schemaIDGUID"])
 584         t = str(ndr_unpack(misc.GUID, res[0]["schemaIDGUID"][0]))
 585
 586         self.class_schemaIDGUID[cls] = t
 587         return t
 588
 589     def process_sd(self, dn, obj):
 590         sd_attr = "nTSecurityDescriptor"
 591         sd_val = obj[sd_attr]
 592
 593         sd = ndr_unpack(security.descriptor, str(sd_val))
 594
 595         is_deleted = 'isDeleted' in obj and obj['isDeleted'][0].upper() == 'TRUE'
 596         if is_deleted:
 597             # we don't fix deleted objects
 598             return (sd, None)
 599
 600         sd_clean = security.descriptor()
 601         sd_clean.owner_sid = sd.owner_sid
 602         sd_clean.group_sid = sd.group_sid
 603         sd_clean.type = sd.type
 604         sd_clean.revision = sd.revision
 605
 606         broken = False
 607         last_inherited_type = None
 608
 609         aces = []
 610         if sd.sacl is not None:
 611             aces = sd.sacl.aces
 612         for i in range(0, len(aces)):
 613             ace = aces[i]
 614
 615             if not ace.flags & security.SEC_ACE_FLAG_INHERITED_ACE:
 616                 sd_clean.sacl_add(ace)
 617                 continue
 618
 619             t = self.ace_get_effective_inherited_type(ace)
 620             if t is None:
 621                 continue
 622
 623             if last_inherited_type is not None:
 624                 if t != last_inherited_type:
 625                     # if it inherited from more than
 626                     # one type it's very likely to be broken
 627                     #
 628                     # If not the recalculation will calculate
 629                     # the same result.
 630                     broken = True
 631                 continue
 632
 633             last_inherited_type = t
 634
 635         aces = []
 636         if sd.dacl is not None:
 637             aces = sd.dacl.aces
 638         for i in range(0, len(aces)):
 639             ace = aces[i]
 640
 641             if not ace.flags & security.SEC_ACE_FLAG_INHERITED_ACE:
 642                 sd_clean.dacl_add(ace)
 643                 continue
 644
 645             t = self.ace_get_effective_inherited_type(ace)
 646             if t is None:
 647                 continue
 648
 649             if last_inherited_type is not None:
 650                 if t != last_inherited_type:
 651                     # if it inherited from more than
 652                     # one type it's very likely to be broken
 653                     #
 654                     # If not the recalculation will calculate
 655                     # the same result.
 656                     broken = True
 657                 continue
 658
 659             last_inherited_type = t
 660
 661         if broken:
 662             return (sd_clean, sd)
 663
 664         if last_inherited_type is None:
 665             # ok
 666             return (sd, None)
 667
 668         cls = None
 669         try:
 670             cls = obj["objectClass"][-1]
 671         except KeyError, e:
 672             pass
 673
 674         if cls is None:
 675             res = self.samdb.search(base=dn, scope=ldb.SCOPE_BASE,
 676                                     attrs=["isDeleted", "objectClass"],
 677                                     controls=["show_recycled:1"])
 678             o = res[0]
 679             is_deleted = 'isDeleted' in o and o['isDeleted'][0].upper() == 'TRUE'
 680             if is_deleted:
 681                 # we don't fix deleted objects
 682                 return (sd, None)
 683             cls = o["objectClass"][-1]
 684
 685         t = self.lookup_class_schemaIDGUID(cls)
 686
 687         if t != last_inherited_type:
 688             # broken
 689             return (sd_clean, sd)
 690
 691         # ok
 692         return (sd, None)
 693
 694     def err_wrong_sd(self, dn, sd, sd_broken):
 695         '''re-write replPropertyMetaData elements for a single attribute for a
 696         object. This is used to fix missing replPropertyMetaData elements'''
 697         sd_attr = "nTSecurityDescriptor"
 698         sd_val = ndr_pack(sd)
 699         sd_flags = security.SECINFO_DACL | security.SECINFO_SACL
 700
 701         if not self.confirm_all('Fix %s on %s?' % (sd_attr, dn), 'fix_ntsecuritydescriptor'):
 702             self.report('Not fixing %s on %s\n' % (sd_attr, dn))
 703             return
 704
 705         nmsg = ldb.Message()
 706         nmsg.dn = dn
 707         nmsg[sd_attr] = ldb.MessageElement(sd_val, ldb.FLAG_MOD_REPLACE, sd_attr)
 708         if self.do_modify(nmsg, ["sd_flags:1:%d" % sd_flags],
 709                           "Failed to fix metadata for attribute %s" % sd_attr):
 710             self.report("Fixed attribute '%s' of '%s'\n" % (sd_attr, dn))
 711
 712     def is_fsmo_role(self, dn):
 713         if dn == self.samdb.domain_dn:
 714             return True
 715         if dn == self.infrastructure_dn:
 716             return True
 717         if dn == self.naming_dn:
 718             return True
 719         if dn == self.schema_dn:
 720             return True
 721         if dn == self.rid_dn:
 722             return True
 723
 724         return False
 725
 726     def calculate_instancetype(self, dn):
 727         instancetype = 0
 728         nc_root = self.samdb.get_nc_root(dn)
 729         if dn == nc_root:
 730             instancetype |= dsdb.INSTANCE_TYPE_IS_NC_HEAD
 731             try:
 732                 self.samdb.search(base=dn.parent(), scope=ldb.SCOPE_BASE, attrs=[], controls=["show_recycled:1"])
 733             except ldb.LdbError, (enum, estr):
 734                 if enum != ldb.ERR_NO_SUCH_OBJECT:
 735                     raise
 736             else:
 737                 instancetype |= dsdb.INSTANCE_TYPE_NC_ABOVE
 738
 739         if self.write_ncs is not None and str(nc_root) in self.write_ncs:
 740             instancetype |= dsdb.INSTANCE_TYPE_WRITE
 741
 742         return instancetype
 743
 744     def check_object(self, dn, attrs=['*']):
 745         '''check one object'''
 746         if self.verbose:
 747             self.report("Checking object %s" % dn)
 748         if '*' in attrs:
 749             attrs.append("replPropertyMetaData")
 750
 751         try:
 752             sd_flags = 0
 753             sd_flags |= security.SECINFO_OWNER
 754             sd_flags |= security.SECINFO_GROUP
 755             sd_flags |= security.SECINFO_DACL
 756             sd_flags |= security.SECINFO_SACL
 757
 758             res = self.samdb.search(base=dn, scope=ldb.SCOPE_BASE,
 759                                     controls=[
 760                                         "extended_dn:1:1",
 761                                         "show_recycled:1",
 762                                         "show_deleted:1",
 763                                         "sd_flags:1:%d" % sd_flags,
 764                                     ],
 765                                     attrs=attrs)
 766         except ldb.LdbError, (enum, estr):
 767             if enum == ldb.ERR_NO_SUCH_OBJECT:
 768                 if self.in_transaction:
 769                     self.report("ERROR: Object %s disappeared during check" % dn)
 770                     return 1
 771                 return 0
 772             raise
 773         if len(res) != 1:
 774             self.report("ERROR: Object %s failed to load during check" % dn)
 775             return 1
 776         obj = res[0]
 777         error_count = 0
 778         list_attrs_from_md = []
 779         list_attrs_seen = []
 780         got_repl_property_meta_data = False
 781
 782         for attrname in obj:
 783             if attrname == 'dn':
 784                 continue
 785
 786             if str(attrname).lower() == 'replpropertymetadata':
 787                 list_attrs_from_md = self.process_metadata(obj[attrname])
 788                 got_repl_property_meta_data = True
 789                 continue
 790
 791             if str(attrname).lower() == 'ntsecuritydescriptor':
 792                 (sd, sd_broken) = self.process_sd(dn, obj)
 793                 if sd_broken is not None:
 794                     self.err_wrong_sd(dn, sd, sd_broken)
 795                     error_count += 1
 796                 continue
 797
 798             if str(attrname).lower() == 'objectclass':
 799                 normalised = self.samdb.dsdb_normalise_attributes(self.samdb_schema, attrname, list(obj[attrname]))
 800                 if list(normalised) != list(obj[attrname]):
 801                     self.err_normalise_mismatch_replace(dn, attrname, list(obj[attrname]))
 802                     error_count += 1
 803                 continue
 804
 805             # check for empty attributes
 806             for val in obj[attrname]:
 807                 if val == '':
 808                     self.err_empty_attribute(dn, attrname)
 809                     error_count += 1
 810                     continue
 811
 812             # get the syntax oid for the attribute, so we can can have
 813             # special handling for some specific attribute types
 814             try:
 815                 syntax_oid = self.samdb_schema.get_syntax_oid_from_lDAPDisplayName(attrname)
 816             except Exception, msg:
 817                 self.err_unknown_attribute(obj, attrname)
 818                 error_count += 1
 819                 continue
 820
 821             flag = self.samdb_schema.get_systemFlags_from_lDAPDisplayName(attrname)
 822             if (not flag & dsdb.DS_FLAG_ATTR_NOT_REPLICATED
 823                 and not flag & dsdb.DS_FLAG_ATTR_IS_CONSTRUCTED
 824                 and not self.samdb_schema.get_linkId_from_lDAPDisplayName(attrname)):
 825                 list_attrs_seen.append(str(attrname).lower())
 826
 827             if syntax_oid in [ dsdb.DSDB_SYNTAX_BINARY_DN, dsdb.DSDB_SYNTAX_OR_NAME,
 828                                dsdb.DSDB_SYNTAX_STRING_DN, ldb.SYNTAX_DN ]:
 829                 # it's some form of DN, do specialised checking on those
 830                 error_count += self.check_dn(obj, attrname, syntax_oid)
 831
 832             # check for incorrectly normalised attributes
 833             for val in obj[attrname]:
 834                 normalised = self.samdb.dsdb_normalise_attributes(self.samdb_schema, attrname, [val])
 835                 if len(normalised) != 1 or normalised[0] != val:
 836                     self.err_normalise_mismatch(dn, attrname, obj[attrname])
 837                     error_count += 1
 838                     break
 839
 840             if str(attrname).lower() == "instancetype":
 841                 calculated_instancetype = self.calculate_instancetype(dn)
 842                 if len(obj["instanceType"]) != 1 or obj["instanceType"][0] != str(calculated_instancetype):
 843                     self.err_wrong_instancetype(obj, calculated_instancetype)
 844
 845         show_dn = True
 846         if got_repl_property_meta_data:
 847             rdn = (str(dn).split(","))[0]
 848             if rdn == "CN=Deleted Objects":
 849                 isDeletedAttId = 131120
 850                 # It's 29/12/9999 at 23:59:59 UTC as specified in MS-ADTS 7.1.1.4.2 Deleted Objects Container
 851
 852                 expectedTimeDo = 2650466015990000000
 853                 originating = self.get_originating_time(obj["replPropertyMetaData"], isDeletedAttId)
 854                 if originating != expectedTimeDo:
 855                     if self.confirm_all("Fix isDeleted originating_change_time on '%s'" % str(dn), 'fix_time_metadata'):
 856                         nmsg = ldb.Message()
 857                         nmsg.dn = dn
 858                         nmsg["isDeleted"] = ldb.MessageElement("TRUE", ldb.FLAG_MOD_REPLACE, "isDeleted")
 859                         error_count += 1
 860                         self.samdb.modify(nmsg, controls=["provision:0"])
 861
 862                     else:
 863                         self.report("Not fixing isDeleted originating_change_time on '%s'" % str(dn))
 864             for att in list_attrs_seen:
 865                 if not att in list_attrs_from_md:
 866                     if show_dn:
 867                         self.report("On object %s" % dn)
 868                         show_dn = False
 869                     error_count += 1
 870                     self.report("ERROR: Attribute %s not present in replication metadata" % att)
 871                     if not self.confirm_all("Fix missing replPropertyMetaData element '%s'" % att, 'fix_all_metadata'):
 872                         self.report("Not fixing missing replPropertyMetaData element '%s'" % att)
 873                         continue
 874                     self.fix_metadata(dn, att)
 875
 876         if self.is_fsmo_role(dn):
 877             if "fSMORoleOwner" not in obj:
 878                 self.err_no_fsmoRoleOwner(obj)
 879                 error_count += 1
 880
 881         try:
 882             if dn != self.samdb.get_root_basedn():
 883                 res = self.samdb.search(base=dn.parent(), scope=ldb.SCOPE_BASE,
 884                                         controls=["show_recycled:1", "show_deleted:1"])
 885         except ldb.LdbError, (enum, estr):
 886             if enum == ldb.ERR_NO_SUCH_OBJECT:
 887                 self.err_missing_parent(obj)
 888                 error_count += 1
 889             else:
 890                 raise
 891
 892         return error_count
 893
 894     ################################################################
 895     # check special @ROOTDSE attributes
 896     def check_rootdse(self):
 897         '''check the @ROOTDSE special object'''
 898         dn = ldb.Dn(self.samdb, '@ROOTDSE')
 899         if self.verbose:
 900             self.report("Checking object %s" % dn)
 901         res = self.samdb.search(base=dn, scope=ldb.SCOPE_BASE)
 902         if len(res) != 1:
 903             self.report("Object %s disappeared during check" % dn)
 904             return 1
 905         obj = res[0]
 906         error_count = 0
 907
 908         # check that the dsServiceName is in GUID form
 909         if not 'dsServiceName' in obj:
 910             self.report('ERROR: dsServiceName missing in @ROOTDSE')
 911             return error_count+1
 912
 913         if not obj['dsServiceName'][0].startswith('<GUID='):
 914             self.report('ERROR: dsServiceName not in GUID form in @ROOTDSE')
 915             error_count += 1
 916             if not self.confirm('Change dsServiceName to GUID form?'):
 917                 return error_count
 918             res = self.samdb.search(base=ldb.Dn(self.samdb, obj['dsServiceName'][0]),
 919                                     scope=ldb.SCOPE_BASE, attrs=['objectGUID'])
 920             guid_str = str(ndr_unpack(misc.GUID, res[0]['objectGUID'][0]))
 921             m = ldb.Message()
 922             m.dn = dn
 923             m['dsServiceName'] = ldb.MessageElement("<GUID=%s>" % guid_str,
 924                                                     ldb.FLAG_MOD_REPLACE, 'dsServiceName')
 925             if self.do_modify(m, [], "Failed to change dsServiceName to GUID form", validate=False):
 926                 self.report("Changed dsServiceName to GUID form")
 927         return error_count
 928
 929
 930     ###############################################
 931     # re-index the database
 932     def reindex_database(self):
 933         '''re-index the whole database'''
 934         m = ldb.Message()
 935         m.dn = ldb.Dn(self.samdb, "@ATTRIBUTES")
 936         m['add']    = ldb.MessageElement('NONE', ldb.FLAG_MOD_ADD, 'force_reindex')
 937         m['delete'] = ldb.MessageElement('NONE', ldb.FLAG_MOD_DELETE, 'force_reindex')
 938         return self.do_modify(m, [], 're-indexed database', validate=False)
 939
 940     ###############################################
 941     # reset @MODULES
 942     def reset_modules(self):
 943         '''reset @MODULES to that needed for current sam.ldb (to read a very old database)'''
 944         m = ldb.Message()
 945         m.dn = ldb.Dn(self.samdb, "@MODULES")
 946         m['@LIST'] = ldb.MessageElement('samba_dsdb', ldb.FLAG_MOD_REPLACE, '@LIST')
 947         return self.do_modify(m, [], 'reset @MODULES on database', validate=False)