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Diffstat (limited to 'python/samba/schema.py')
| -rw-r--r-- | python/samba/schema.py | 204 |
1 files changed, 204 insertions, 0 deletions
diff --git a/python/samba/schema.py b/python/samba/schema.py new file mode 100644 index 0000000000..5c8f506f26 --- /dev/null +++ b/python/samba/schema.py @@ -0,0 +1,204 @@ +# +# 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, name_map={}): + sddl = "O:SAG:SAD:AI(OA;;CR;e12b56b6-0a95-11d1-adbb-00c04fd8d5cd;;SA)" \ + "(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;1131f6aa-9c07-11d1-f79f-00c04fc2dcd2;;BA)" \ + "(OA;;CR;1131f6ab-9c07-11d1-f79f-00c04fc2dcd2;;BA)" \ + "(OA;;CR;1131f6ac-9c07-11d1-f79f-00c04fc2dcd2;;BA)" \ + "(A;CI;RPLCLORC;;;AU)" \ + "(A;CI;RPWPCRCCLCLORCWOWDSW;;;SA)" \ + "(A;CI;RPWPCRCCDCLCLORCWOWDSDDTSW;;;SY)" \ + "(OA;;CR;1131f6ad-9c07-11d1-f79f-00c04fc2dcd2;;ED)" \ + "(OA;;CR;89e95b76-444d-4c62-991a-0facbeda640c;;ED)" \ + "(OA;;CR;1131f6ad-9c07-11d1-f79f-00c04fc2dcd2;;BA)" \ + "(OA;;CR;89e95b76-444d-4c62-991a-0facbeda640c;;BA)" \ + "(OA;;CR;1131f6aa-9c07-11d1-f79f-00c04fc2dcd2;;ER)" \ + "(OA;;CR;1131f6ad-9c07-11d1-f79f-00c04fc2dcd2;;ER)" \ + "(OA;;CR;89e95b76-444d-4c62-991a-0facbeda640c;;ER)" \ + "S:(AU;SA;WPCCDCWOWDSDDTSW;;;WD)" \ + "(AU;CISA;WP;;;WD)" \ + "(AU;SA;CR;;;BA)" \ + "(AU;SA;CR;;;DU)" \ + "(OU;SA;CR;e12b56b6-0a95-11d1-adbb-00c04fd8d5cd;;WD)" \ + "(OU;SA;CR;45ec5156-db7e-47bb-b53f-dbeb2d03c40f;;WD)" + sec = security.descriptor.from_sddl(sddl, domain_sid) + return ndr_pack(sec) + + +class Schema(object): + + def __init__(self, domain_sid, invocationid=None, schemadn=None, + files=None, override_prefixmap=None, additional_prefixmap=None): + from samba.provision import setup_path + + """Load schema for the SamDB from the AD schema files and + samba4_schema.ldif + + :param samdb: Load a schema into a SamDB. + :param schemadn: DN of the schema + + 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 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}) + + 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: %s\nprefixMap:: %s\n\n" % (self.schemadn, self.prefixmap_data) + self.set_from_ldif(prefixmap_ldif, self.schema_data, self.schemadn) + + def set_from_ldif(self, pf, df, dn): + dsdb._dsdb_set_schema_from_ldif(self.ldb, pf, df, dn) + + 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(schemadn="cn=schema,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 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. + """ + + if domainsid is None: + domainsid = security.random_sid() + else: + domainsid = security.dom_sid(domainsid) + return Schema(domainsid, schemadn=schemadn, + override_prefixmap=override_prefixmap) |