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#
# Unix SMB/CIFS implementation.
# backend code for provisioning a Samba4 server
#
# Copyright (C) Jelmer Vernooij <jelmer@samba.org> 2007-2008
# Copyright (C) Andrew Bartlett <abartlet@samba.org> 2008-2009
# Copyright (C) Oliver Liebel <oliver@itc.li> 2008-2009
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
"""Functions for setting up a Samba Schema."""
from base64 import b64encode
from samba import read_and_sub_file, substitute_var, check_all_substituted
from samba.dcerpc import security
from samba.ms_schema import read_ms_schema
from samba.ndr import ndr_pack
from samba.samdb import SamDB
from samba import dsdb
from ldb import SCOPE_SUBTREE, SCOPE_ONELEVEL
import os
def get_schema_descriptor(domain_sid):
sddl = "O:SAG:SAD:AI(OA;;CR;89e95b76-444d-4c62-991a-0facbeda640c" \
";;ER)(OA;;CR;1131f6aa-9c07-11d1-f79f-00c04fc2dcd2;;ER)(OA;;CR;1131f6ad-9c07-1" \
"1d1-f79f-00c04fc2dcd2;;ER)(OA;;CR;e12b56b6-0a95-11d1-adbb-00c04fd8d5cd;;SA)(O" \
"A;;CR;89e95b76-444d-4c62-991a-0facbeda640c;;BA)(OA;;CR;1131f6aa-9c07-11d1-f79" \
"f-00c04fc2dcd2;;BA)(OA;;CR;1131f6ab-9c07-11d1-f79f-00c04fc2dcd2;;BA)(OA;;CR;1" \
"131f6ac-9c07-11d1-f79f-00c04fc2dcd2;;BA)(OA;;CR;1131f6ad-9c07-11d1-f79f-00c04" \
"fc2dcd2;;BA)(OA;;CR;89e95b76-444d-4c62-991a-0facbeda640c;;ED)(OA;;CR;1131f6aa" \
"-9c07-11d1-f79f-00c04fc2dcd2;;ED)(OA;;CR;1131f6ab-9c07-11d1-f79f-00c04fc2dcd2" \
";;ED)(OA;;CR;1131f6ac-9c07-11d1-f79f-00c04fc2dcd2;;ED)(OA;;CR;1131f6ad-9c07-1" \
"1d1-f79f-00c04fc2dcd2;;ED)(A;;RPWPCCDCLCLORCWOWDSDDTSW;;;LA)(A;CI;RPWPCRCCLCL" \
"ORCWOWDSW;;;SA)(A;CI;RPLCLORC;;;AU)(A;CI;RPWPCRCCDCLCLORCWOWDSDDTSW;;;SY)S:(O" \
"U;SA;CR;45ec5156-db7e-47bb-b53f-dbeb2d03c40f;;WD)(OU;SA;CR;e12b56b6-0a95-11d1" \
"-adbb-00c04fd8d5cd;;WD)(AU;SA;CR;;;DU)(AU;SA;CR;;;BA)(AU;SA;WPCCDCWOWDSDDTSW;" \
";;WD)(AU;CISA;WP;;;WD)"
sec = security.descriptor.from_sddl(sddl, domain_sid)
return ndr_pack(sec)
class Schema(object):
def __init__(self, setup_path, domain_sid, invocationid=None, schemadn=None,
serverdn=None, files=None, override_prefixmap=None, additional_prefixmap=None):
"""Load schema for the SamDB from the AD schema files and samba4_schema.ldif
:param samdb: Load a schema into a SamDB.
:param setup_path: Setup path function.
:param schemadn: DN of the schema
:param serverdn: DN of the server
Returns the schema data loaded, to avoid double-parsing when then needing to add it to the db
"""
self.schemadn = schemadn
# We need to have the am_rodc=False just to keep some warnings quiet - this isn't a real SAM, so it's meaningless.
self.ldb = SamDB(global_schema=False, am_rodc=False)
if serverdn is not None:
self.ldb.set_ntds_settings_dn("CN=NTDS Settings,%s" % serverdn)
if invocationid is not None:
self.ldb.set_invocation_id(invocationid)
self.schema_data = read_ms_schema(
setup_path('ad-schema/MS-AD_Schema_2K8_R2_Attributes.txt'),
setup_path('ad-schema/MS-AD_Schema_2K8_R2_Classes.txt'))
if files is not None:
for file in files:
self.schema_data += open(file, 'r').read()
self.schema_data = substitute_var(self.schema_data,
{"SCHEMADN": schemadn})
check_all_substituted(self.schema_data)
self.schema_dn_modify = read_and_sub_file(
setup_path("provision_schema_basedn_modify.ldif"),
{"SCHEMADN": schemadn, "SERVERDN": serverdn})
descr = b64encode(get_schema_descriptor(domain_sid))
self.schema_dn_add = read_and_sub_file(
setup_path("provision_schema_basedn.ldif"),
{"SCHEMADN": schemadn, "DESCRIPTOR": descr})
if override_prefixmap is not None:
self.prefixmap_data = override_prefixmap
else:
self.prefixmap_data = open(setup_path("prefixMap.txt"), 'r').read()
if additional_prefixmap is not None:
for map in additional_prefixmap:
self.prefixmap_data += "%s\n" % map
self.prefixmap_data = b64encode(self.prefixmap_data)
# We don't actually add this ldif, just parse it
prefixmap_ldif = "dn: cn=schema\nprefixMap:: %s\n\n" % self.prefixmap_data
self.set_from_ldif(prefixmap_ldif, self.schema_data)
def set_from_ldif(self, pf, df):
dsdb._dsdb_set_schema_from_ldif(self.ldb, pf, df)
def write_to_tmp_ldb(self, schemadb_path):
self.ldb.connect(url=schemadb_path)
self.ldb.transaction_start()
try:
self.ldb.add_ldif("""dn: @ATTRIBUTES
linkID: INTEGER
dn: @INDEXLIST
@IDXATTR: linkID
@IDXATTR: attributeSyntax
""")
# These bits of LDIF are supplied when the Schema object is created
self.ldb.add_ldif(self.schema_dn_add)
self.ldb.modify_ldif(self.schema_dn_modify)
self.ldb.add_ldif(self.schema_data)
except:
self.ldb.transaction_cancel()
raise
else:
self.ldb.transaction_commit()
# Return a hash with the forward attribute as a key and the back as the value
def linked_attributes(self):
return get_linked_attributes(self.schemadn, self.ldb)
def dnsyntax_attributes(self):
return get_dnsyntax_attributes(self.schemadn, self.ldb)
def convert_to_openldap(self, target, mapping):
return dsdb._dsdb_convert_schema_to_openldap(self.ldb, target, mapping)
# Return a hash with the forward attribute as a key and the back as the value
def get_linked_attributes(schemadn,schemaldb):
attrs = ["linkID", "lDAPDisplayName"]
res = schemaldb.search(expression="(&(linkID=*)(!(linkID:1.2.840.113556.1.4.803:=1))(objectclass=attributeSchema)(attributeSyntax=2.5.5.1))", base=schemadn, scope=SCOPE_ONELEVEL, attrs=attrs)
attributes = {}
for i in range (0, len(res)):
expression = "(&(objectclass=attributeSchema)(linkID=%d)(attributeSyntax=2.5.5.1))" % (int(res[i]["linkID"][0])+1)
target = schemaldb.searchone(basedn=schemadn,
expression=expression,
attribute="lDAPDisplayName",
scope=SCOPE_SUBTREE)
if target is not None:
attributes[str(res[i]["lDAPDisplayName"])]=str(target)
return attributes
def get_dnsyntax_attributes(schemadn,schemaldb):
res = schemaldb.search(
expression="(&(!(linkID=*))(objectclass=attributeSchema)(attributeSyntax=2.5.5.1))",
base=schemadn, scope=SCOPE_ONELEVEL,
attrs=["linkID", "lDAPDisplayName"])
attributes = []
for i in range (0, len(res)):
attributes.append(str(res[i]["lDAPDisplayName"]))
return attributes
def ldb_with_schema(setup_dir=None,
schemadn="cn=schema,cn=configuration,dc=example,dc=com",
serverdn="cn=server,cn=servers,cn=default-first-site-name,cn=sites,cn=cn=configuration,dc=example,dc=com",
domainsid=None,
override_prefixmap=None):
"""Load schema for the SamDB from the AD schema files and samba4_schema.ldif
:param setup_dir: Setup path
:param schemadn: DN of the schema
:param serverdn: DN of the server
Returns the schema data loaded as an object, with .ldb being a
new ldb with the schema loaded. This allows certain tests to
operate without a remote or local schema.
"""
def setup_path(file):
return os.path.join(setup_dir, file)
if domainsid is None:
domainsid = security.random_sid()
else:
domainsid = security.dom_sid(domainsid)
return Schema(setup_path, domainsid, schemadn=schemadn, serverdn=serverdn, override_prefixmap=override_prefixmap)
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