3 # Unix SMB/CIFS implementation.
4 # Copyright (C) Matthieu Patou <mat@matws.net> 2009-2010
7 # This program is free software; you can redistribute it and/or modify
8 # it under the terms of the GNU General Public License as published by
9 # the Free Software Foundation; either version 3 of the License, or
10 # (at your option) any later version.
12 # This program is distributed in the hope that it will be useful,
13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 # GNU General Public License for more details.
17 # You should have received a copy of the GNU General Public License
18 # along with this program. If not, see <http://www.gnu.org/licenses/>.
23 import samba
.xattr_native
, samba
.xattr_tdb
24 from samba
.dcerpc
import security
, xattr
25 from samba
.ndr
import ndr_pack
, ndr_unpack
26 class XattrBackendError(Exception):
27 """A generic xattr backend error."""
29 def checkset_backend(lp
,backend
,eadbfile
):
31 if backend
== "native":
32 lp
.set("posix:eadb","")
33 elif backend
== "tdb":
35 lp
.set("posix:eadb",eadbfile
)
37 os
.path
.abspath(os
.path
.join(lp
.get("private dir"),"eadb.tdb"))
39 raise XattrBackendError("Unvalid xattr backend choice %s"%backend
)
41 def getntacl(lp
,file,backend
=None,eadbfile
=None):
43 checkset_backend(lp
,backend
,eadbfile
)
46 eadbname
= lp
.get("posix:eadb")
47 if eadbname
!= None and eadbname
!= "" :
48 attribute
= samba
.xattr_tdb
.wrap_getxattr(eadbname
,file,xattr
.XATTR_NTACL_NAME
)
50 attribute
= samba
.xattr_tdb
.wrap_getxattr(eadbname
,file,xattr
.XATTR_NTACL_NAME
)
52 print "Fail to open %s"%eadbname
53 attribute
= samba
.xattr_native
.wrap_getxattr(file,xattr
.XATTR_NTACL_NAME
)
55 attribute
= samba
.xattr_native
.wrap_getxattr(file,xattr
.XATTR_NTACL_NAME
)
56 ntacl
= ndr_unpack(xattr
.NTACL
,attribute
)
59 def setntacl(lp
,file,sddl
,domsid
,backend
=None,eadbfile
=None):
61 checkset_backend(lp
,backend
,eadbfile
)
66 sid
=security
.dom_sid(domsid
)
67 sd
= security
.descriptor
.from_sddl(sddl
, sid
)
69 eadbname
= lp
.get("posix:eadb")
70 if eadbname
!= None and eadbname
!= "":
72 attribute
= samba
.xattr_tdb
.wrap_setxattr(eadbname
,file,xattr
.XATTR_NTACL_NAME
,ndr_pack(ntacl
))
74 print "Fail to open %s"%eadbname
75 attribute
= samba
.xattr_native
.wrap_setxattr(file,xattr
.XATTR_NTACL_NAME
,ndr_pack(ntacl
))
77 attribute
= samba
.xattr_native
.wrap_setxattr(file,xattr
.XATTR_NTACL_NAME
,ndr_pack(ntacl
))
79 # Takes the access mask of a DS ACE and transform them in a File ACE mask
80 def ldapmask2filemask(ldm
):
81 RIGHT_DS_CREATE_CHILD
= 0x00000001
82 RIGHT_DS_DELETE_CHILD
= 0x00000002
83 RIGHT_DS_LIST_CONTENTS
= 0x00000004
84 ACTRL_DS_SELF
= 0x00000008
85 RIGHT_DS_READ_PROPERTY
= 0x00000010
86 RIGHT_DS_WRITE_PROPERTY
= 0x00000020
87 RIGHT_DS_DELETE_TREE
= 0x00000040
88 RIGHT_DS_LIST_OBJECT
= 0x00000080
89 RIGHT_DS_CONTROL_ACCESS
= 0x00000100
90 FILE_READ_DATA
= 0x0001
91 FILE_LIST_DIRECTORY
= 0x0001
92 FILE_WRITE_DATA
= 0x0002
93 FILE_ADD_FILE
= 0x0002
94 FILE_APPEND_DATA
= 0x0004
95 FILE_ADD_SUBDIRECTORY
= 0x0004
96 FILE_CREATE_PIPE_INSTANCE
= 0x0004
98 FILE_WRITE_EA
= 0x0010
100 FILE_TRAVERSE
= 0x0020
101 FILE_DELETE_CHILD
= 0x0040
102 FILE_READ_ATTRIBUTES
= 0x0080
103 FILE_WRITE_ATTRIBUTES
= 0x0100
105 READ_CONTROL
= 0x00020000
106 WRITE_DAC
= 0x00040000
107 WRITE_OWNER
= 0x00080000
108 SYNCHRONIZE
= 0x00100000
109 STANDARD_RIGHTS_ALL
= 0x001F0000
111 filemask
= ldm
& STANDARD_RIGHTS_ALL
114 if( (ldm
& RIGHT_DS_READ_PROPERTY
) and (ldm
& RIGHT_DS_LIST_CONTENTS
) ):
115 filemask
= filemask |
(SYNCHRONIZE | FILE_LIST_DIRECTORY |\
116 FILE_READ_ATTRIBUTES | FILE_READ_EA |\
117 FILE_READ_DATA | FILE_EXECUTE
)
119 if( (ldm
& RIGHT_DS_WRITE_PROPERTY
) ):
120 filemask
= filemask |
(SYNCHRONIZE | FILE_WRITE_DATA |\
121 FILE_APPEND_DATA | FILE_WRITE_EA |\
122 FILE_WRITE_ATTRIBUTES | FILE_ADD_FILE |\
123 FILE_ADD_SUBDIRECTORY
)
125 if( (ldm
& RIGHT_DS_CREATE_CHILD
) ):
126 filemask
= filemask |
(FILE_ADD_SUBDIRECTORY | FILE_ADD_FILE
)
128 if( (ldm
& RIGHT_DS_DELETE_CHILD
) ):
129 filemask
= filemask | FILE_DELETE_CHILD
133 # This function takes an the SDDL representation of a DS
134 # ACL and return the SDDL representation of this ACL adapted
135 # for files. It's used for Policy object provision
137 def dsacl2fsacl(dssddl
,domsid
):
138 sid
= security
.dom_sid(domsid
)
139 ref
= security
.descriptor
.from_sddl(dssddl
,sid
)
140 fdescr
= security
.descriptor()
141 fdescr
.owner_sid
= ref
.owner_sid
142 fdescr
.group_sid
= ref
.group_sid
143 fdescr
.type = ref
.type
144 fdescr
.revision
= ref
.revision
145 fdescr
.sacl
= ref
.sacl
147 for i
in range(0,len(aces
)):
149 if not ace
.type & security
.SEC_ACE_TYPE_ACCESS_ALLOWED_OBJECT
and str(ace
.trustee
) != security
.SID_BUILTIN_PREW2K
:
150 # if fdescr.type & security.SEC_DESC_DACL_AUTO_INHERITED:
151 ace
.flags
= ace
.flags | security
.SEC_ACE_FLAG_OBJECT_INHERIT | security
.SEC_ACE_FLAG_CONTAINER_INHERIT
152 if str(ace
.trustee
) == security
.SID_CREATOR_OWNER
:
153 # For Creator/Owner the IO flag is set as this ACE has only a sense for child objects
154 ace
.flags
= ace
.flags | security
.SEC_ACE_FLAG_INHERIT_ONLY
155 ace
.access_mask
= ldapmask2filemask(ace
.access_mask
)
158 return fdescr
.as_sddl(sid
)