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# Unix SMB/CIFS implementation.
# Copyright (C) 2008 Kai Blin <kai@samba.org>
#
#
# 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/>.
#
"""Convenience functions for using the idmap database."""
__docformat__ = "restructuredText"
import ldb
import samba
class IDmapDB(samba.Ldb):
"""The IDmap database."""
# Mappings for ID_TYPE_UID, ID_TYPE_GID and ID_TYPE_BOTH
TYPE_UID = 1
TYPE_GID = 2
TYPE_BOTH = 3
def __init__(self, url=None, lp=None, modules_dir=None, session_info=None,
credentials=None, flags=0, options=None):
"""Opens the IDMap Database.
For parameter meanings see the super class (samba.Ldb)
"""
self.lp = lp
if url is None:
url = lp.private_path("idmap.ldb")
super(IDmapDB, self).__init__(url=url, lp=lp, modules_dir=modules_dir,
session_info=session_info, credentials=credentials, flags=flags,
options=options)
def connect(self, url=None, flags=0, options=None):
super(IDmapDB, self).connect(url=self.lp.private_path(url), flags=flags,
options=options)
def increment_xid(self):
"""Increment xidNumber, if not present it create and assign it to the lowerBound
:return xid can that be used for SID/unixid mapping
"""
res = self.search(expression="distinguishedName=CN=CONFIG", base="",
scope=ldb.SCOPE_SUBTREE)
id = res[0].get("xidNumber")
flag = ldb.FLAG_MOD_REPLACE
if id is None:
id = res[0].get("lowerBound")
flag = ldb.FLAG_MOD_ADD
newid = int(str(id)) + 1
msg = ldb.Message()
msg.dn = ldb.Dn(self, "CN=CONFIG")
msg["xidNumber"] = ldb.MessageElement(str(newid), flag, "xidNumber")
self.modify(msg)
return id
def setup_name_mapping(self, sid, type, unixid=None):
"""Setup a mapping between a sam name and a unix name.
:param sid: SID of the NT-side of the mapping.
:param unixname: Unix id to map to, if none supplied the next one will be selected
"""
if unixid is None:
unixid = self.increment_xid()
type_string = ""
if type == self.TYPE_UID:
type_string = "ID_TYPE_UID"
elif type == self.TYPE_GID:
type_string = "ID_TYPE_GID"
elif type == self.TYPE_BOTH:
type_string = "ID_TYPE_BOTH"
else:
return
mod = """
dn: CN=%s
xidNumber: %s
objectSid: %s
objectClass: sidMap
type: %s
cn: %s
""" % (sid, unixid, sid, type_string, sid)
self.add(next(self.parse_ldif(mod))[1])
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