mirror of
https://github.com/samba-team/samba.git
synced 2024-12-22 13:34:15 +03:00
87afc3aee1
Reviewed-by: Andrew Bartlett <abartlet@samba.org> Autobuild-User(master): Andrew Bartlett <abartlet@samba.org> Autobuild-Date(master): Sat Mar 2 03:57:34 CET 2013 on sn-devel-104
81 lines
3.1 KiB
Python
81 lines
3.1 KiB
Python
# Utility methods for security descriptor manipulation
|
|
#
|
|
# Copyright Nadezhda Ivanova 2010 <nivanova@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/>.
|
|
#
|
|
|
|
"""Utility methods for security descriptor manipulation."""
|
|
|
|
import samba
|
|
from ldb import Message, MessageElement, Dn
|
|
from ldb import FLAG_MOD_REPLACE, SCOPE_BASE
|
|
from samba.ndr import ndr_pack, ndr_unpack
|
|
from samba.dcerpc import security
|
|
|
|
|
|
class SDUtils(object):
|
|
"""Some utilities for manipulation of security descriptors on objects."""
|
|
|
|
def __init__(self, samdb):
|
|
self.ldb = samdb
|
|
self.domain_sid = security.dom_sid(self.ldb.get_domain_sid())
|
|
|
|
def modify_sd_on_dn(self, object_dn, sd, controls=None):
|
|
"""Modify security descriptor using either SDDL string
|
|
or security.descriptor object
|
|
"""
|
|
m = Message()
|
|
m.dn = Dn(self.ldb, object_dn)
|
|
assert(isinstance(sd, str) or isinstance(sd, security.descriptor))
|
|
if isinstance(sd, str):
|
|
tmp_desc = security.descriptor.from_sddl(sd, self.domain_sid)
|
|
elif isinstance(sd, security.descriptor):
|
|
tmp_desc = sd
|
|
|
|
m["nTSecurityDescriptor"] = MessageElement(ndr_pack(tmp_desc),
|
|
FLAG_MOD_REPLACE,
|
|
"nTSecurityDescriptor")
|
|
self.ldb.modify(m, controls)
|
|
|
|
def read_sd_on_dn(self, object_dn, controls=None):
|
|
res = self.ldb.search(object_dn, SCOPE_BASE, None,
|
|
["nTSecurityDescriptor"], controls=controls)
|
|
desc = res[0]["nTSecurityDescriptor"][0]
|
|
return ndr_unpack(security.descriptor, desc)
|
|
|
|
def get_object_sid(self, object_dn):
|
|
res = self.ldb.search(object_dn)
|
|
return ndr_unpack(security.dom_sid, res[0]["objectSid"][0])
|
|
|
|
def dacl_add_ace(self, object_dn, ace):
|
|
"""Add an ACE to an objects security descriptor
|
|
"""
|
|
desc = self.read_sd_on_dn(object_dn)
|
|
desc_sddl = desc.as_sddl(self.domain_sid)
|
|
if ace in desc_sddl:
|
|
return
|
|
if desc_sddl.find("(") >= 0:
|
|
desc_sddl = (desc_sddl[:desc_sddl.index("(")] + ace +
|
|
desc_sddl[desc_sddl.index("("):])
|
|
else:
|
|
desc_sddl = desc_sddl + ace
|
|
self.modify_sd_on_dn(object_dn, desc_sddl)
|
|
|
|
def get_sd_as_sddl(self, object_dn, controls=None):
|
|
"""Return object nTSecutiryDescriptor in SDDL format
|
|
"""
|
|
desc = self.read_sd_on_dn(object_dn, controls=controls)
|
|
return desc.as_sddl(self.domain_sid)
|