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-rw-r--r--source4/scripting/python/samba/dbchecker.py183
1 files changed, 181 insertions, 2 deletions
diff --git a/source4/scripting/python/samba/dbchecker.py b/source4/scripting/python/samba/dbchecker.py
index bc68457a05..06fd82752f 100644
--- a/source4/scripting/python/samba/dbchecker.py
+++ b/source4/scripting/python/samba/dbchecker.py
@@ -21,9 +21,10 @@ import ldb
from samba import dsdb
from samba import common
from samba.dcerpc import misc
-from samba.ndr import ndr_unpack
+from samba.ndr import ndr_unpack, ndr_pack
from samba.dcerpc import drsblobs
from samba.common import dsdb_Dn
+from samba.dcerpc import security
class dbcheck(object):
@@ -49,6 +50,7 @@ class dbcheck(object):
self.fix_all_missing_backlinks = False
self.fix_all_orphaned_backlinks = False
self.fix_rmd_flags = False
+ self.fix_ntsecuritydescriptor = False
self.seize_fsmo_role = False
self.move_to_lost_and_found = False
self.fix_instancetype = False
@@ -58,6 +60,7 @@ class dbcheck(object):
self.schema_dn = samdb.get_schema_basedn()
self.rid_dn = ldb.Dn(samdb, "CN=RID Manager$,CN=System," + samdb.domain_dn())
self.ntds_dsa = samdb.get_dsServiceName()
+ self.class_schemaIDGUID = {}
res = self.samdb.search(base=self.ntds_dsa, scope=ldb.SCOPE_BASE, attrs=['msDS-hasMasterNCs', 'hasMasterNCs'])
if "msDS-hasMasterNCs" in res[0]:
@@ -548,6 +551,164 @@ newSuperior: %s""" % (str(from_dn), str(to_rdn), str(to_base)))
"Failed to fix metadata for attribute %s" % attr):
self.report("Fixed metadata for attribute %s" % attr)
+ def ace_get_effective_inherited_type(self, ace):
+ if ace.flags & security.SEC_ACE_FLAG_INHERIT_ONLY:
+ return None
+
+ check = False
+ if ace.type == security.SEC_ACE_TYPE_ACCESS_ALLOWED_OBJECT:
+ check = True
+ elif ace.type == security.SEC_ACE_TYPE_ACCESS_DENIED_OBJECT:
+ check = True
+ elif ace.type == security.SEC_ACE_TYPE_SYSTEM_AUDIT_OBJECT:
+ check = True
+ elif ace.type == security.SEC_ACE_TYPE_SYSTEM_ALARM_OBJECT:
+ check = True
+
+ if not check:
+ return None
+
+ if not ace.object.flags & security.SEC_ACE_INHERITED_OBJECT_TYPE_PRESENT:
+ return None
+
+ return str(ace.object.inherited_type)
+
+ def lookup_class_schemaIDGUID(self, cls):
+ if cls in self.class_schemaIDGUID:
+ return self.class_schemaIDGUID[cls]
+
+ flt = "(&(ldapDisplayName=%s)(objectClass=classSchema))" % cls
+ res = self.samdb.search(base=self.schema_dn,
+ expression=flt,
+ attrs=["schemaIDGUID"])
+ t = str(ndr_unpack(misc.GUID, res[0]["schemaIDGUID"][0]))
+
+ self.class_schemaIDGUID[cls] = t
+ return t
+
+ def process_sd(self, dn, obj):
+ sd_attr = "nTSecurityDescriptor"
+ sd_val = obj[sd_attr]
+
+ sd = ndr_unpack(security.descriptor, str(sd_val))
+
+ is_deleted = 'isDeleted' in obj and obj['isDeleted'][0].upper() == 'TRUE'
+ if is_deleted:
+ # we don't fix deleted objects
+ return (sd, None)
+
+ sd_clean = security.descriptor()
+ sd_clean.owner_sid = sd.owner_sid
+ sd_clean.group_sid = sd.group_sid
+ sd_clean.type = sd.type
+ sd_clean.revision = sd.revision
+
+ broken = False
+ last_inherited_type = None
+
+ aces = []
+ if sd.sacl is not None:
+ aces = sd.sacl.aces
+ for i in range(0, len(aces)):
+ ace = aces[i]
+
+ if not ace.flags & security.SEC_ACE_FLAG_INHERITED_ACE:
+ sd_clean.sacl_add(ace)
+ continue
+
+ t = self.ace_get_effective_inherited_type(ace)
+ if t is None:
+ continue
+
+ if last_inherited_type is not None:
+ if t != last_inherited_type:
+ # if it inherited from more than
+ # one type it's very likely to be broken
+ #
+ # If not the recalculation will calculate
+ # the same result.
+ broken = True
+ continue
+
+ last_inherited_type = t
+
+ aces = []
+ if sd.dacl is not None:
+ aces = sd.dacl.aces
+ for i in range(0, len(aces)):
+ ace = aces[i]
+
+ if not ace.flags & security.SEC_ACE_FLAG_INHERITED_ACE:
+ sd_clean.dacl_add(ace)
+ continue
+
+ t = self.ace_get_effective_inherited_type(ace)
+ if t is None:
+ continue
+
+ if last_inherited_type is not None:
+ if t != last_inherited_type:
+ # if it inherited from more than
+ # one type it's very likely to be broken
+ #
+ # If not the recalculation will calculate
+ # the same result.
+ broken = True
+ continue
+
+ last_inherited_type = t
+
+ if broken:
+ return (sd_clean, sd)
+
+ if last_inherited_type is None:
+ # ok
+ return (sd, None)
+
+ cls = None
+ try:
+ cls = obj["objectClass"][-1]
+ except KeyError, e:
+ pass
+
+ if cls is None:
+ res = self.samdb.search(base=dn, scope=ldb.SCOPE_BASE,
+ attrs=["isDeleted", "objectClass"],
+ controls=["show_recycled:1"])
+ o = res[0]
+ is_deleted = 'isDeleted' in o and o['isDeleted'][0].upper() == 'TRUE'
+ if is_deleted:
+ # we don't fix deleted objects
+ return (sd, None)
+ cls = o["objectClass"][-1]
+
+ t = self.lookup_class_schemaIDGUID(cls)
+
+ if t != last_inherited_type:
+ # broken
+ return (sd_clean, sd)
+
+ # ok
+ return (sd, None)
+
+ def err_wrong_sd(self, dn, sd, sd_broken):
+ '''re-write replPropertyMetaData elements for a single attribute for a
+ object. This is used to fix missing replPropertyMetaData elements'''
+ sd_attr = "nTSecurityDescriptor"
+ sd_val = ndr_pack(sd)
+ sd_flags = security.SECINFO_DACL | security.SECINFO_SACL
+
+ if not self.confirm_all('Fix %s on %s?' % (sd_attr, dn), 'fix_ntsecuritydescriptor'):
+ self.report('Not fixing %s on %s\n' % (sd_attr, dn))
+ return
+
+ nmsg = ldb.Message()
+ nmsg.dn = dn
+ nmsg[sd_attr] = ldb.MessageElement(sd_val, ldb.FLAG_MOD_REPLACE, sd_attr)
+ if self.do_modify(nmsg, ["sd_flags:1:%d" % sd_flags],
+ "Failed to fix metadata for attribute %s" % sd_attr):
+ self.report("Fixed attribute '%s' of '%s'\n" % (sd_attr, dn))
+
def is_fsmo_role(self, dn):
if dn == self.samdb.domain_dn:
return True
@@ -588,8 +749,19 @@ newSuperior: %s""" % (str(from_dn), str(to_rdn), str(to_base)))
attrs.append("replPropertyMetaData")
try:
+ sd_flags = 0
+ sd_flags |= security.SECINFO_OWNER
+ sd_flags |= security.SECINFO_GROUP
+ sd_flags |= security.SECINFO_DACL
+ sd_flags |= security.SECINFO_SACL
+
res = self.samdb.search(base=dn, scope=ldb.SCOPE_BASE,
- controls=["extended_dn:1:1", "show_recycled:1", "show_deleted:1"],
+ controls=[
+ "extended_dn:1:1",
+ "show_recycled:1",
+ "show_deleted:1",
+ "sd_flags:1:%d" % sd_flags,
+ ],
attrs=attrs)
except ldb.LdbError, (enum, estr):
if enum == ldb.ERR_NO_SUCH_OBJECT:
@@ -616,6 +788,13 @@ newSuperior: %s""" % (str(from_dn), str(to_rdn), str(to_base)))
got_repl_property_meta_data = True
continue
+ if str(attrname).lower() == 'ntsecuritydescriptor':
+ (sd, sd_broken) = self.process_sd(dn, obj)
+ if sd_broken is not None:
+ self.err_wrong_sd(dn, sd, sd_broken)
+ error_count += 1
+ continue
+
if str(attrname).lower() == 'objectclass':
normalised = self.samdb.dsdb_normalise_attributes(self.samdb_schema, attrname, list(obj[attrname]))
if list(normalised) != list(obj[attrname]):
generated by cgit (git 2.34.1) at 2024-11-23 01:20:17 +0000