3 # Samba4 AD database checker
5 # Copyright (C) Andrew Tridgell 2011
7 # This program is free software; you can redistribute it and/or modify
8 # it under the terms of the GNU General Public License as published by
9 # the Free Software Foundation; either version 3 of the License, or
10 # (at your option) any later version.
12 # This program is distributed in the hope that it will be useful,
13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 # GNU General Public License for more details.
17 # You should have received a copy of the GNU General Public License
18 # along with this program. If not, see <http://www.gnu.org/licenses/>.
22 from samba import dsdb
23 from samba import common
24 from samba.dcerpc import misc
27 class dsdb_DN(object):
28 '''a class to manipulate DN components'''
30 def __init__(self, samdb, dnstring, syntax_oid):
31 if syntax_oid in [ dsdb.DSDB_SYNTAX_BINARY_DN, dsdb.DSDB_SYNTAX_STRING_DN ]:
32 colons = dnstring.split(':')
34 raise Exception("invalid DN prefix")
35 prefix_len = 4 + len(colons[1]) + int(colons[1])
36 self.prefix = dnstring[0:prefix_len]
37 self.dnstring = dnstring[prefix_len:]
39 self.dnstring = dnstring
42 self.dn = ldb.Dn(samdb, self.dnstring)
43 except Exception, msg:
44 print("ERROR: bad DN string '%s'" % self.dnstring)
48 return self.prefix + str(self.dn.extended_str(mode=1))
50 class dbcheck(object):
51 """check a SAM database for errors"""
53 def __init__(self, samdb, samdb_schema=None, verbose=False, fix=False, yes=False, quiet=False):
55 self.samdb_schema = (samdb_schema or samdb)
56 self.verbose = verbose
60 self.remove_all_unknown_attributes = False
62 def check_database(self, DN=None, scope=ldb.SCOPE_SUBTREE, controls=[], attrs=['*']):
63 '''perform a database check, returning the number of errors found'''
65 res = self.samdb.search(base=DN, scope=scope, attrs=['dn'], controls=controls)
66 self.report('Checking %u objects' % len(res))
69 error_count += self.check_object(object.dn, attrs=attrs)
70 if error_count != 0 and not self.fix:
71 self.report("Please use --fix to fix these errors")
72 self.report('Checked %u objects (%u errors)' % (len(res), error_count))
77 def report(self, msg):
78 '''print a message unless quiet is set'''
83 ################################################################
84 # a local confirm function that obeys the --fix and --yes options
85 def confirm(self, msg, allow_all=False, forced=False):
86 '''confirm a change'''
93 return common.confirm(msg, forced=forced, allow_all=allow_all)
95 ################################################################
96 # a local confirm function with support for 'all'
97 def confirm_all(self, msg, all_attr):
98 '''confirm a change with support for "all" '''
103 forced = self.yes or getattr(self, all_attr)
104 c = common.confirm(msg, forced=forced, allow_all=True)
106 setattr(self, all_attr, True)
111 ################################################################
112 # handle empty attributes
113 def err_empty_attribute(self, dn, attrname):
114 '''fix empty attributes'''
115 self.report("ERROR: Empty attribute %s in %s" % (attrname, dn))
116 if not self.confirm('Remove empty attribute %s from %s?' % (attrname, dn)):
117 self.report("Not fixing empty attribute %s" % attrname)
122 m[attrname] = ldb.MessageElement('', ldb.FLAG_MOD_DELETE, attrname)
124 self.report(self.samdb.write_ldif(m, ldb.CHANGETYPE_MODIFY))
126 self.samdb.modify(m, controls=["relax:0"], validate=False)
127 except Exception, msg:
128 self.report("Failed to remove empty attribute %s : %s" % (attrname, msg))
130 self.report("Removed empty attribute %s" % attrname)
133 ################################################################
134 # handle normalisation mismatches
135 def err_normalise_mismatch(self, dn, attrname, values):
136 '''fix attribute normalisation errors'''
137 self.report("ERROR: Normalisation error for attribute %s in %s" % (attrname, dn))
140 normalised = self.samdb.dsdb_normalise_attributes(self.samdb_schema, attrname, [val])
141 if len(normalised) != 1:
142 self.report("Unable to normalise value '%s'" % val)
143 mod_list.append((val, ''))
144 elif (normalised[0] != val):
145 self.report("value '%s' should be '%s'" % (val, normalised[0]))
146 mod_list.append((val, normalised[0]))
147 if not self.confirm('Fix normalisation for %s from %s?' % (attrname, dn)):
148 self.report("Not fixing attribute %s" % attrname)
153 for i in range(0, len(mod_list)):
154 (val, nval) = mod_list[i]
155 m['value_%u' % i] = ldb.MessageElement(val, ldb.FLAG_MOD_DELETE, attrname)
157 m['normv_%u' % i] = ldb.MessageElement(nval, ldb.FLAG_MOD_ADD, attrname)
160 self.report(self.samdb.write_ldif(m, ldb.CHANGETYPE_MODIFY))
162 self.samdb.modify(m, controls=["relax:0"], validate=False)
163 except Exception, msg:
164 self.report("Failed to normalise attribute %s : %s" % (attrname, msg))
166 self.report("Normalised attribute %s" % attrname)
168 def is_deleted_objects_dn(self, dsdb_dn):
169 '''see if a dsdb_DN is the special Deleted Objects DN'''
170 return dsdb_dn.prefix == "B:32:18E2EA80684F11D2B9AA00C04F79F805:"
173 ################################################################
174 # handle a missing GUID extended DN component
175 def err_incorrect_dn_GUID(self, dn, attrname, val, dsdb_dn, errstr):
176 self.report("ERROR: %s component for %s in object %s - %s" % (errstr, attrname, dn, val))
177 controls=["extended_dn:1:1"]
178 if self.is_deleted_objects_dn(dsdb_dn):
179 controls.append("show_deleted:1")
181 res = self.samdb.search(base=str(dsdb_dn.dn), scope=ldb.SCOPE_BASE,
182 attrs=[], controls=controls)
183 except ldb.LdbError, (enum, estr):
184 self.report("unable to find object for DN %s - cannot fix (%s)" % (dsdb_dn.dn, estr))
186 dsdb_dn.dn = res[0].dn
188 if not self.confirm('Change DN to %s?' % str(dsdb_dn)):
189 self.report("Not fixing %s" % errstr)
193 m['old_value'] = ldb.MessageElement(val, ldb.FLAG_MOD_DELETE, attrname)
194 m['new_value'] = ldb.MessageElement(str(dsdb_dn), ldb.FLAG_MOD_ADD, attrname)
196 self.report(self.samdb.write_ldif(m, ldb.CHANGETYPE_MODIFY))
199 except Exception, msg:
200 self.report("Failed to fix %s on attribute %s : %s" % (errstr, attrname, msg))
202 self.report("Fixed %s on attribute %s" % (errstr, attrname))
205 ################################################################
206 # handle a DN pointing to a deleted object
207 def err_deleted_dn(self, dn, attrname, val, dsdb_dn, correct_dn):
208 self.report("ERROR: target DN is deleted for %s in object %s - %s" % (attrname, dn, val))
209 self.report("Target GUID points at deleted DN %s" % correct_dn)
210 if not self.confirm('Remove DN?'):
211 self.report("Not removing")
215 m['old_value'] = ldb.MessageElement(val, ldb.FLAG_MOD_DELETE, attrname)
217 self.report(self.samdb.write_ldif(m, ldb.CHANGETYPE_MODIFY))
220 except Exception, msg:
221 self.report("Failed to remove deleted DN attribute %s : %s" % (attrname, msg))
223 self.report("Removed deleted DN on attribute %s" % attrname)
226 ################################################################
227 # handle a DN string being incorrect
228 def err_dn_target_mismatch(self, dn, attrname, val, dsdb_dn, correct_dn, errstr):
229 self.report("ERROR: incorrect DN string component for %s in object %s - %s" % (attrname, dn, val))
230 dsdb_dn.dn = correct_dn
232 if not self.confirm('Change DN to %s?' % str(dsdb_dn)):
233 self.report("Not fixing %s" % errstr)
237 m['old_value'] = ldb.MessageElement(val, ldb.FLAG_MOD_DELETE, attrname)
238 m['new_value'] = ldb.MessageElement(str(dsdb_dn), ldb.FLAG_MOD_ADD, attrname)
240 self.report(self.samdb.write_ldif(m, ldb.CHANGETYPE_MODIFY))
243 except Exception, msg:
244 self.report("Failed to fix incorrect DN string on attribute %s : %s" % (attrname, msg))
246 self.report("Fixed incorrect DN string on attribute %s" % (attrname))
248 ################################################################
249 # handle an unknown attribute error
250 def err_unknown_attribute(self, obj, attrname):
251 '''handle an unknown attribute error'''
252 self.report("ERROR: unknown attribute '%s' in %s" % (attrname, obj.dn))
253 if not self.confirm_all('Remove unknown attribute %s' % attrname, 'remove_all_unknown_attributes'):
254 self.report("Not removing %s" % attrname)
258 m['old_value'] = ldb.MessageElement([], ldb.FLAG_MOD_DELETE, attrname)
260 self.report(self.samdb.write_ldif(m, ldb.CHANGETYPE_MODIFY))
262 self.samdb.modify(m, controls=["relax:0"])
263 except Exception, msg:
264 self.report("Failed to remove unknown attribute %s : %s" % (attrname, msg))
266 self.report("Removed unknown attribute %s" % (attrname))
269 ################################################################
270 # specialised checking for a dn attribute
271 def check_dn(self, obj, attrname, syntax_oid):
272 '''check a DN attribute for correctness'''
274 for val in obj[attrname]:
275 dsdb_dn = dsdb_DN(self.samdb, val, syntax_oid)
277 # all DNs should have a GUID component
278 guid = dsdb_dn.dn.get_extended_component("GUID")
281 self.err_incorrect_dn_GUID(obj.dn, attrname, val, dsdb_dn, "missing GUID")
284 guidstr = str(misc.GUID(guid))
286 # check its the right GUID
288 res = self.samdb.search(base="<GUID=%s>" % guidstr, scope=ldb.SCOPE_BASE,
289 attrs=['isDeleted'], controls=["extended_dn:1:1", "show_deleted:1"])
290 except ldb.LdbError, (enum, estr):
292 self.err_incorrect_dn_GUID(obj.dn, attrname, val, dsdb_dn, "incorrect GUID")
295 # the target DN might be deleted
296 if ((not self.is_deleted_objects_dn(dsdb_dn)) and
297 'isDeleted' in res[0] and
298 res[0]['isDeleted'][0].upper() == "TRUE"):
299 # note that we don't check this for the special wellKnownObjects prefix
300 # for Deleted Objects, as we expect that to be deleted
302 self.err_deleted_dn(obj.dn, attrname, val, dsdb_dn, res[0].dn)
305 # check the DN matches in string form
306 if res[0].dn.extended_str() != dsdb_dn.dn.extended_str():
308 self.err_dn_target_mismatch(obj.dn, attrname, val, dsdb_dn,
309 res[0].dn, "incorrect string version of DN")
316 ################################################################
317 # check one object - calls to individual error handlers above
318 def check_object(self, dn, attrs=['*']):
319 '''check one object'''
321 self.report("Checking object %s" % dn)
322 res = self.samdb.search(base=dn, scope=ldb.SCOPE_BASE, controls=["extended_dn:1:1"], attrs=attrs)
324 self.report("Object %s disappeared during check" % dn)
332 # check for empty attributes
333 for val in obj[attrname]:
335 self.err_empty_attribute(dn, attrname)
339 # get the syntax oid for the attribute, so we can can have
340 # special handling for some specific attribute types
342 syntax_oid = self.samdb_schema.get_syntax_oid_from_lDAPDisplayName(attrname)
343 except Exception, msg:
344 self.err_unknown_attribute(obj, attrname)
348 if syntax_oid in [ dsdb.DSDB_SYNTAX_BINARY_DN, dsdb.DSDB_SYNTAX_OR_NAME,
349 dsdb.DSDB_SYNTAX_STRING_DN, ldb.LDB_SYNTAX_DN ]:
350 # it's some form of DN, do specialised checking on those
351 error_count += self.check_dn(obj, attrname, syntax_oid)
353 # check for incorrectly normalised attributes
354 for val in obj[attrname]:
355 normalised = self.samdb.dsdb_normalise_attributes(self.samdb_schema, attrname, [val])
356 if len(normalised) != 1 or normalised[0] != val:
357 self.err_normalise_mismatch(dn, attrname, obj[attrname])