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https://github.com/samba-team/samba.git
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121 lines
4.3 KiB
Python
121 lines
4.3 KiB
Python
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#!/usr/bin/python
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# Unix SMB/CIFS implementation.
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# Copyright (C) Matthieu Patou <mat@matws.net> 2009
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#
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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import samba.xattr
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from samba.dcerpc import security, xattr
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from samba.ndr import ndr_pack, ndr_unpack
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def getntacl(file):
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attribute = samba.xattr.wrap_getxattr(file,xattr.XATTR_NTACL_NAME)
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anysid=security.dom_sid(security.SID_NT_SELF)
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ntacl = ndr_unpack(xattr.NTACL,attribute,1)
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return ntacl.info.as_sddl(anysid)
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def setntacl(file,sddl):
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ntacl=xattr.NTACL()
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ntacl.version = 1
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anysid=security.dom_sid(security.SID_NT_SELF)
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sd = security.descriptor.from_sddl(sddl, anysid)
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ntacl.info = sd
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attribute = samba.xattr.wrap_setxattr(file,xattr.XATTR_NTACL_NAME,ndr_pack(ntacl))
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# Takes the access mask of a DS ACE and transform them in a File ACE mask
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def ldapmask2filemask(ldm):
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RIGHT_DS_CREATE_CHILD = 0x00000001
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RIGHT_DS_DELETE_CHILD = 0x00000002
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RIGHT_DS_LIST_CONTENTS = 0x00000004
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ACTRL_DS_SELF = 0x00000008
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RIGHT_DS_READ_PROPERTY = 0x00000010
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RIGHT_DS_WRITE_PROPERTY = 0x00000020
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RIGHT_DS_DELETE_TREE = 0x00000040
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RIGHT_DS_LIST_OBJECT = 0x00000080
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RIGHT_DS_CONTROL_ACCESS = 0x00000100
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FILE_READ_DATA = 0x0001
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FILE_LIST_DIRECTORY = 0x0001
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FILE_WRITE_DATA = 0x0002
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FILE_ADD_FILE = 0x0002
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FILE_APPEND_DATA = 0x0004
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FILE_ADD_SUBDIRECTORY = 0x0004
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FILE_CREATE_PIPE_INSTANCE = 0x0004
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FILE_READ_EA = 0x0008
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FILE_WRITE_EA = 0x0010
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FILE_EXECUTE = 0x0020
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FILE_TRAVERSE = 0x0020
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FILE_DELETE_CHILD = 0x0040
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FILE_READ_ATTRIBUTES = 0x0080
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FILE_WRITE_ATTRIBUTES = 0x0100
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DELETE = 0x00010000
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READ_CONTROL = 0x00020000
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WRITE_DAC = 0x00040000
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WRITE_OWNER = 0x00080000
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SYNCHRONIZE = 0x00100000
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STANDARD_RIGHTS_ALL = 0x001F0000
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filemask = ldm & STANDARD_RIGHTS_ALL
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#filemask = 0
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if( (ldm & RIGHT_DS_READ_PROPERTY) and (ldm & RIGHT_DS_LIST_CONTENTS) ):
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filemask = filemask | (SYNCHRONIZE | FILE_LIST_DIRECTORY |\
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FILE_READ_ATTRIBUTES | FILE_READ_EA |\
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FILE_READ_DATA | FILE_EXECUTE)
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if( (ldm & RIGHT_DS_WRITE_PROPERTY) ):
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filemask = filemask | (SYNCHRONIZE | FILE_WRITE_DATA |\
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FILE_APPEND_DATA | FILE_WRITE_EA |\
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FILE_WRITE_ATTRIBUTES | FILE_ADD_FILE |\
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FILE_ADD_SUBDIRECTORY)
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if( (ldm & RIGHT_DS_CREATE_CHILD) ):
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filemask = filemask | (FILE_ADD_SUBDIRECTORY | FILE_ADD_FILE)
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if( (ldm & RIGHT_DS_DELETE_CHILD) ):
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filemask = filemask | FILE_DELETE_CHILD
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return filemask
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# This function takes an the SDDL representation of a DS
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# ACL and return the SDDL representation of this ACL adapted
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# for files. It's used for Policy object provision
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def dsacl2fsacl(dssddl):
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anysid = security.dom_sid(security.SID_NT_SELF)
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ref = security.descriptor.from_sddl(dssddl,anysid)
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fdescr = security.descriptor()
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fdescr.owner_sid = ref.owner_sid
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fdescr.group_sid = ref.group_sid
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fdescr.type = ref.type
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fdescr.revision = ref.revision
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fdescr.sacl = ref.sacl
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aces = ref.dacl.aces
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for i in range(0,len(aces)):
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ace = aces[i]
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if not ace.type & security.SEC_ACE_TYPE_ACCESS_ALLOWED_OBJECT and str(ace.trustee) != security.SID_BUILTIN_PREW2K:
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# if fdescr.type & security.SEC_DESC_DACL_AUTO_INHERITED:
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ace.flags = ace.flags | security.SEC_ACE_FLAG_OBJECT_INHERIT | security.SEC_ACE_FLAG_CONTAINER_INHERIT
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if str(ace.trustee) == security.SID_CREATOR_OWNER:
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# For Creator/Owner the IO flag is set as this ACE has only a sense for child objects
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ace.flags = ace.flags | security.SEC_ACE_FLAG_INHERIT_ONLY
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ace.access_mask = ldapmask2filemask(ace.access_mask)
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fdescr.dacl_add(ace)
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return fdescr.as_sddl(anysid)
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