2 Unix SMB/CIFS implementation.
3 SMB NT Security Descriptor / Unix permission conversion.
4 Copyright (C) Jeremy Allison 1994-2009.
5 Copyright (C) Andreas Gruenbacher 2002.
6 Copyright (C) Simo Sorce <idra@samba.org> 2009.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>.
23 #include "smbd/smbd.h"
24 #include "system/filesys.h"
25 #include "../libcli/security/security.h"
27 #include "passdb/lookup_sid.h"
29 #include "../librpc/gen_ndr/idmap.h"
30 #include "../librpc/gen_ndr/ndr_smb_acl.h"
31 #include "lib/param/loadparm.h"
33 extern const struct generic_mapping file_generic_mapping
;
36 #define DBGC_CLASS DBGC_ACLS
38 /****************************************************************************
39 Data structures representing the internal ACE format.
40 ****************************************************************************/
42 enum ace_owner
{UID_ACE
, GID_ACE
, WORLD_ACE
};
43 enum ace_attribute
{ALLOW_ACE
, DENY_ACE
}; /* Used for incoming NT ACLS. */
45 typedef struct canon_ace
{
46 struct canon_ace
*next
, *prev
;
48 mode_t perms
; /* Only use S_I(R|W|X)USR mode bits here. */
49 struct dom_sid trustee
;
50 enum ace_owner owner_type
;
51 enum ace_attribute attr
;
52 struct unixid unix_ug
;
53 uint8_t ace_flags
; /* From windows ACE entry. */
56 #define ALL_ACE_PERMS (S_IRUSR|S_IWUSR|S_IXUSR)
59 * EA format of user.SAMBA_PAI (Samba_Posix_Acl_Interitance)
60 * attribute on disk - version 1.
61 * All values are little endian.
63 * | 1 | 1 | 2 | 2 | ....
64 * +------+------+-------------+---------------------+-------------+--------------------+
65 * | vers | flag | num_entries | num_default_entries | ..entries.. | default_entries... |
66 * +------+------+-------------+---------------------+-------------+--------------------+
71 * +------+-------------------+
72 * | value| uid/gid or world |
74 * +------+-------------------+
76 * Version 2 format. Stores extra Windows metadata about an ACL.
78 * | 1 | 2 | 2 | 2 | ....
79 * +------+----------+-------------+---------------------+-------------+--------------------+
80 * | vers | ace | num_entries | num_default_entries | ..entries.. | default_entries... |
81 * | 2 | type | | | | |
82 * +------+----------+-------------+---------------------+-------------+--------------------+
87 * +------+------+-------------------+
88 * | ace | value| uid/gid or world |
89 * | flag | type | value |
90 * +------+-------------------+------+
94 #define PAI_VERSION_OFFSET 0
96 #define PAI_V1_FLAG_OFFSET 1
97 #define PAI_V1_NUM_ENTRIES_OFFSET 2
98 #define PAI_V1_NUM_DEFAULT_ENTRIES_OFFSET 4
99 #define PAI_V1_ENTRIES_BASE 6
100 #define PAI_V1_ACL_FLAG_PROTECTED 0x1
101 #define PAI_V1_ENTRY_LENGTH 5
103 #define PAI_V1_VERSION 1
105 #define PAI_V2_TYPE_OFFSET 1
106 #define PAI_V2_NUM_ENTRIES_OFFSET 3
107 #define PAI_V2_NUM_DEFAULT_ENTRIES_OFFSET 5
108 #define PAI_V2_ENTRIES_BASE 7
109 #define PAI_V2_ENTRY_LENGTH 6
111 #define PAI_V2_VERSION 2
114 * In memory format of user.SAMBA_PAI attribute.
118 struct pai_entry
*next
, *prev
;
120 enum ace_owner owner_type
;
121 struct unixid unix_ug
;
126 unsigned int num_entries
;
127 struct pai_entry
*entry_list
;
128 unsigned int num_def_entries
;
129 struct pai_entry
*def_entry_list
;
132 /************************************************************************
133 Return a uint32_t of the pai_entry principal.
134 ************************************************************************/
136 static uint32_t get_pai_entry_val(struct pai_entry
*paie
)
138 switch (paie
->owner_type
) {
140 DEBUG(10,("get_pai_entry_val: uid = %u\n", (unsigned int)paie
->unix_ug
.id
));
141 return (uint32_t)paie
->unix_ug
.id
;
143 DEBUG(10,("get_pai_entry_val: gid = %u\n", (unsigned int)paie
->unix_ug
.id
));
144 return (uint32_t)paie
->unix_ug
.id
;
147 DEBUG(10,("get_pai_entry_val: world ace\n"));
152 /************************************************************************
153 Return a uint32_t of the entry principal.
154 ************************************************************************/
156 static uint32_t get_entry_val(canon_ace
*ace_entry
)
158 switch (ace_entry
->owner_type
) {
160 DEBUG(10,("get_entry_val: uid = %u\n", (unsigned int)ace_entry
->unix_ug
.id
));
161 return (uint32_t)ace_entry
->unix_ug
.id
;
163 DEBUG(10,("get_entry_val: gid = %u\n", (unsigned int)ace_entry
->unix_ug
.id
));
164 return (uint32_t)ace_entry
->unix_ug
.id
;
167 DEBUG(10,("get_entry_val: world ace\n"));
172 /************************************************************************
173 Create the on-disk format (always v2 now). Caller must free.
174 ************************************************************************/
176 static char *create_pai_buf_v2(canon_ace
*file_ace_list
,
177 canon_ace
*dir_ace_list
,
181 char *pai_buf
= NULL
;
182 canon_ace
*ace_list
= NULL
;
183 char *entry_offset
= NULL
;
184 unsigned int num_entries
= 0;
185 unsigned int num_def_entries
= 0;
188 for (ace_list
= file_ace_list
; ace_list
; ace_list
= ace_list
->next
) {
192 for (ace_list
= dir_ace_list
; ace_list
; ace_list
= ace_list
->next
) {
196 DEBUG(10,("create_pai_buf_v2: num_entries = %u, num_def_entries = %u\n", num_entries
, num_def_entries
));
198 *store_size
= PAI_V2_ENTRIES_BASE
+
199 ((num_entries
+ num_def_entries
)*PAI_V2_ENTRY_LENGTH
);
201 pai_buf
= talloc_array(talloc_tos(), char, *store_size
);
206 /* Set up the header. */
207 memset(pai_buf
, '\0', PAI_V2_ENTRIES_BASE
);
208 SCVAL(pai_buf
,PAI_VERSION_OFFSET
,PAI_V2_VERSION
);
209 SSVAL(pai_buf
,PAI_V2_TYPE_OFFSET
, sd_type
);
210 SSVAL(pai_buf
,PAI_V2_NUM_ENTRIES_OFFSET
,num_entries
);
211 SSVAL(pai_buf
,PAI_V2_NUM_DEFAULT_ENTRIES_OFFSET
,num_def_entries
);
213 DEBUG(10,("create_pai_buf_v2: sd_type = 0x%x\n",
214 (unsigned int)sd_type
));
216 entry_offset
= pai_buf
+ PAI_V2_ENTRIES_BASE
;
219 for (ace_list
= file_ace_list
; ace_list
; ace_list
= ace_list
->next
) {
220 uint8_t type_val
= (uint8_t)ace_list
->owner_type
;
221 uint32_t entry_val
= get_entry_val(ace_list
);
223 SCVAL(entry_offset
,0,ace_list
->ace_flags
);
224 SCVAL(entry_offset
,1,type_val
);
225 SIVAL(entry_offset
,2,entry_val
);
226 DEBUG(10,("create_pai_buf_v2: entry %u [0x%x] [0x%x] [0x%x]\n",
228 (unsigned int)ace_list
->ace_flags
,
229 (unsigned int)type_val
,
230 (unsigned int)entry_val
));
232 entry_offset
+= PAI_V2_ENTRY_LENGTH
;
235 for (ace_list
= dir_ace_list
; ace_list
; ace_list
= ace_list
->next
) {
236 uint8_t type_val
= (uint8_t)ace_list
->owner_type
;
237 uint32_t entry_val
= get_entry_val(ace_list
);
239 SCVAL(entry_offset
,0,ace_list
->ace_flags
);
240 SCVAL(entry_offset
,1,type_val
);
241 SIVAL(entry_offset
,2,entry_val
);
242 DEBUG(10,("create_pai_buf_v2: entry %u [0x%x] [0x%x] [0x%x]\n",
244 (unsigned int)ace_list
->ace_flags
,
245 (unsigned int)type_val
,
246 (unsigned int)entry_val
));
248 entry_offset
+= PAI_V2_ENTRY_LENGTH
;
254 /************************************************************************
255 Store the user.SAMBA_PAI attribute on disk.
256 ************************************************************************/
258 static void store_inheritance_attributes(files_struct
*fsp
,
259 canon_ace
*file_ace_list
,
260 canon_ace
*dir_ace_list
,
267 if (!lp_map_acl_inherit(SNUM(fsp
->conn
))) {
271 pai_buf
= create_pai_buf_v2(file_ace_list
, dir_ace_list
,
272 sd_type
, &store_size
);
274 if (fsp_get_pathref_fd(fsp
) != -1) {
275 ret
= SMB_VFS_FSETXATTR(fsp
, SAMBA_POSIX_INHERITANCE_EA_NAME
,
276 pai_buf
, store_size
, 0);
278 ret
= SMB_VFS_SETXATTR(fsp
->conn
, fsp
->fsp_name
,
279 SAMBA_POSIX_INHERITANCE_EA_NAME
,
280 pai_buf
, store_size
, 0);
283 TALLOC_FREE(pai_buf
);
285 DEBUG(10,("store_inheritance_attribute: type 0x%x for file %s\n",
286 (unsigned int)sd_type
,
289 if (ret
== -1 && !no_acl_syscall_error(errno
)) {
290 DEBUG(1,("store_inheritance_attribute: Error %s\n", strerror(errno
) ));
294 /************************************************************************
295 Delete the in memory inheritance info.
296 ************************************************************************/
298 static void free_inherited_info(struct pai_val
*pal
)
301 struct pai_entry
*paie
, *paie_next
;
302 for (paie
= pal
->entry_list
; paie
; paie
= paie_next
) {
303 paie_next
= paie
->next
;
306 for (paie
= pal
->def_entry_list
; paie
; paie
= paie_next
) {
307 paie_next
= paie
->next
;
314 /************************************************************************
315 Get any stored ACE flags.
316 ************************************************************************/
318 static uint16_t get_pai_flags(struct pai_val
*pal
, canon_ace
*ace_entry
, bool default_ace
)
320 struct pai_entry
*paie
;
326 /* If the entry exists it is inherited. */
327 for (paie
= (default_ace
? pal
->def_entry_list
: pal
->entry_list
); paie
; paie
= paie
->next
) {
328 if (ace_entry
->owner_type
== paie
->owner_type
&&
329 get_entry_val(ace_entry
) == get_pai_entry_val(paie
))
330 return paie
->ace_flags
;
335 /************************************************************************
336 Ensure an attribute just read is valid - v1.
337 ************************************************************************/
339 static bool check_pai_ok_v1(const char *pai_buf
, size_t pai_buf_data_size
)
341 uint16_t num_entries
;
342 uint16_t num_def_entries
;
344 if (pai_buf_data_size
< PAI_V1_ENTRIES_BASE
) {
345 /* Corrupted - too small. */
349 if (CVAL(pai_buf
,PAI_VERSION_OFFSET
) != PAI_V1_VERSION
) {
353 num_entries
= SVAL(pai_buf
,PAI_V1_NUM_ENTRIES_OFFSET
);
354 num_def_entries
= SVAL(pai_buf
,PAI_V1_NUM_DEFAULT_ENTRIES_OFFSET
);
356 /* Check the entry lists match. */
357 /* Each entry is 5 bytes (type plus 4 bytes of uid or gid). */
359 if (((num_entries
+ num_def_entries
)*PAI_V1_ENTRY_LENGTH
) +
360 PAI_V1_ENTRIES_BASE
!= pai_buf_data_size
) {
367 /************************************************************************
368 Ensure an attribute just read is valid - v2.
369 ************************************************************************/
371 static bool check_pai_ok_v2(const char *pai_buf
, size_t pai_buf_data_size
)
373 uint16_t num_entries
;
374 uint16_t num_def_entries
;
376 if (pai_buf_data_size
< PAI_V2_ENTRIES_BASE
) {
377 /* Corrupted - too small. */
381 if (CVAL(pai_buf
,PAI_VERSION_OFFSET
) != PAI_V2_VERSION
) {
385 num_entries
= SVAL(pai_buf
,PAI_V2_NUM_ENTRIES_OFFSET
);
386 num_def_entries
= SVAL(pai_buf
,PAI_V2_NUM_DEFAULT_ENTRIES_OFFSET
);
388 /* Check the entry lists match. */
389 /* Each entry is 6 bytes (flags + type + 4 bytes of uid or gid). */
391 if (((num_entries
+ num_def_entries
)*PAI_V2_ENTRY_LENGTH
) +
392 PAI_V2_ENTRIES_BASE
!= pai_buf_data_size
) {
399 /************************************************************************
401 ************************************************************************/
403 static bool get_pai_owner_type(struct pai_entry
*paie
, const char *entry_offset
)
405 paie
->owner_type
= (enum ace_owner
)CVAL(entry_offset
,0);
406 switch( paie
->owner_type
) {
408 paie
->unix_ug
.type
= ID_TYPE_UID
;
409 paie
->unix_ug
.id
= (uid_t
)IVAL(entry_offset
,1);
410 DEBUG(10,("get_pai_owner_type: uid = %u\n",
411 (unsigned int)paie
->unix_ug
.id
));
414 paie
->unix_ug
.type
= ID_TYPE_GID
;
415 paie
->unix_ug
.id
= (gid_t
)IVAL(entry_offset
,1);
416 DEBUG(10,("get_pai_owner_type: gid = %u\n",
417 (unsigned int)paie
->unix_ug
.id
));
420 paie
->unix_ug
.type
= ID_TYPE_NOT_SPECIFIED
;
421 paie
->unix_ug
.id
= -1;
422 DEBUG(10,("get_pai_owner_type: world ace\n"));
425 DEBUG(10,("get_pai_owner_type: unknown type %u\n",
426 (unsigned int)paie
->owner_type
));
432 /************************************************************************
434 ************************************************************************/
436 static const char *create_pai_v1_entries(struct pai_val
*paiv
,
437 const char *entry_offset
,
442 for (i
= 0; i
< paiv
->num_entries
; i
++) {
443 struct pai_entry
*paie
= talloc(talloc_tos(), struct pai_entry
);
448 paie
->ace_flags
= SEC_ACE_FLAG_INHERITED_ACE
;
449 if (!get_pai_owner_type(paie
, entry_offset
)) {
455 DLIST_ADD(paiv
->entry_list
, paie
);
457 DLIST_ADD(paiv
->def_entry_list
, paie
);
459 entry_offset
+= PAI_V1_ENTRY_LENGTH
;
464 /************************************************************************
465 Convert to in-memory format from version 1.
466 ************************************************************************/
468 static struct pai_val
*create_pai_val_v1(const char *buf
, size_t size
)
470 const char *entry_offset
;
471 struct pai_val
*paiv
= NULL
;
473 if (!check_pai_ok_v1(buf
, size
)) {
477 paiv
= talloc(talloc_tos(), struct pai_val
);
482 memset(paiv
, '\0', sizeof(struct pai_val
));
484 paiv
->sd_type
= (CVAL(buf
,PAI_V1_FLAG_OFFSET
) == PAI_V1_ACL_FLAG_PROTECTED
) ?
485 SEC_DESC_DACL_PROTECTED
: 0;
487 paiv
->num_entries
= SVAL(buf
,PAI_V1_NUM_ENTRIES_OFFSET
);
488 paiv
->num_def_entries
= SVAL(buf
,PAI_V1_NUM_DEFAULT_ENTRIES_OFFSET
);
490 entry_offset
= buf
+ PAI_V1_ENTRIES_BASE
;
492 DEBUG(10,("create_pai_val: num_entries = %u, num_def_entries = %u\n",
493 paiv
->num_entries
, paiv
->num_def_entries
));
495 entry_offset
= create_pai_v1_entries(paiv
, entry_offset
, false);
496 if (entry_offset
== NULL
) {
497 free_inherited_info(paiv
);
500 entry_offset
= create_pai_v1_entries(paiv
, entry_offset
, true);
501 if (entry_offset
== NULL
) {
502 free_inherited_info(paiv
);
509 /************************************************************************
511 ************************************************************************/
513 static const char *create_pai_v2_entries(struct pai_val
*paiv
,
514 unsigned int num_entries
,
515 const char *entry_offset
,
520 for (i
= 0; i
< num_entries
; i
++) {
521 struct pai_entry
*paie
= talloc(talloc_tos(), struct pai_entry
);
526 paie
->ace_flags
= CVAL(entry_offset
,0);
528 if (!get_pai_owner_type(paie
, entry_offset
+1)) {
533 DLIST_ADD(paiv
->entry_list
, paie
);
535 DLIST_ADD(paiv
->def_entry_list
, paie
);
537 entry_offset
+= PAI_V2_ENTRY_LENGTH
;
542 /************************************************************************
543 Convert to in-memory format from version 2.
544 ************************************************************************/
546 static struct pai_val
*create_pai_val_v2(const char *buf
, size_t size
)
548 const char *entry_offset
;
549 struct pai_val
*paiv
= NULL
;
551 if (!check_pai_ok_v2(buf
, size
)) {
555 paiv
= talloc(talloc_tos(), struct pai_val
);
560 memset(paiv
, '\0', sizeof(struct pai_val
));
562 paiv
->sd_type
= SVAL(buf
,PAI_V2_TYPE_OFFSET
);
564 paiv
->num_entries
= SVAL(buf
,PAI_V2_NUM_ENTRIES_OFFSET
);
565 paiv
->num_def_entries
= SVAL(buf
,PAI_V2_NUM_DEFAULT_ENTRIES_OFFSET
);
567 entry_offset
= buf
+ PAI_V2_ENTRIES_BASE
;
569 DEBUG(10,("create_pai_val_v2: sd_type = 0x%x num_entries = %u, num_def_entries = %u\n",
570 (unsigned int)paiv
->sd_type
,
571 paiv
->num_entries
, paiv
->num_def_entries
));
573 entry_offset
= create_pai_v2_entries(paiv
, paiv
->num_entries
,
574 entry_offset
, false);
575 if (entry_offset
== NULL
) {
576 free_inherited_info(paiv
);
579 entry_offset
= create_pai_v2_entries(paiv
, paiv
->num_def_entries
,
581 if (entry_offset
== NULL
) {
582 free_inherited_info(paiv
);
589 /************************************************************************
590 Convert to in-memory format - from either version 1 or 2.
591 ************************************************************************/
593 static struct pai_val
*create_pai_val(const char *buf
, size_t size
)
598 if (CVAL(buf
,PAI_VERSION_OFFSET
) == PAI_V1_VERSION
) {
599 return create_pai_val_v1(buf
, size
);
600 } else if (CVAL(buf
,PAI_VERSION_OFFSET
) == PAI_V2_VERSION
) {
601 return create_pai_val_v2(buf
, size
);
607 /************************************************************************
608 Load the user.SAMBA_PAI attribute.
609 ************************************************************************/
611 static struct pai_val
*fload_inherited_info(files_struct
*fsp
)
614 size_t pai_buf_size
= 1024;
615 struct pai_val
*paiv
= NULL
;
618 if (!lp_map_acl_inherit(SNUM(fsp
->conn
))) {
622 if ((pai_buf
= talloc_array(talloc_tos(), char, pai_buf_size
)) == NULL
) {
627 if (fsp_get_pathref_fd(fsp
) != -1) {
628 ret
= SMB_VFS_FGETXATTR(fsp
, SAMBA_POSIX_INHERITANCE_EA_NAME
,
629 pai_buf
, pai_buf_size
);
631 ret
= SMB_VFS_GETXATTR(fsp
->conn
,
633 SAMBA_POSIX_INHERITANCE_EA_NAME
,
634 pai_buf
, pai_buf_size
);
638 if (errno
!= ERANGE
) {
641 /* Buffer too small - enlarge it. */
643 TALLOC_FREE(pai_buf
);
644 if (pai_buf_size
> 1024*1024) {
645 return NULL
; /* Limit malloc to 1mb. */
647 if ((pai_buf
= talloc_array(talloc_tos(), char, pai_buf_size
)) == NULL
)
652 DEBUG(10,("load_inherited_info: ret = %lu for file %s\n",
653 (unsigned long)ret
, fsp_str_dbg(fsp
)));
656 /* No attribute or not supported. */
658 if (errno
!= ENOATTR
)
659 DEBUG(10,("load_inherited_info: Error %s\n", strerror(errno
) ));
662 DEBUG(10,("load_inherited_info: Error %s\n", strerror(errno
) ));
664 TALLOC_FREE(pai_buf
);
668 paiv
= create_pai_val(pai_buf
, ret
);
671 DEBUG(10,("load_inherited_info: ACL type is 0x%x for file %s\n",
672 (unsigned int)paiv
->sd_type
, fsp_str_dbg(fsp
)));
675 TALLOC_FREE(pai_buf
);
679 /************************************************************************
680 Load the user.SAMBA_PAI attribute.
681 ************************************************************************/
683 static struct pai_val
*load_inherited_info(const struct connection_struct
*conn
,
684 const struct smb_filename
*smb_fname
)
687 size_t pai_buf_size
= 1024;
688 struct pai_val
*paiv
= NULL
;
691 if (!lp_map_acl_inherit(SNUM(conn
))) {
695 if ((pai_buf
= talloc_array(talloc_tos(), char, pai_buf_size
)) == NULL
) {
700 ret
= SMB_VFS_GETXATTR(conn
, smb_fname
,
701 SAMBA_POSIX_INHERITANCE_EA_NAME
,
702 pai_buf
, pai_buf_size
);
705 if (errno
!= ERANGE
) {
708 /* Buffer too small - enlarge it. */
710 TALLOC_FREE(pai_buf
);
711 if (pai_buf_size
> 1024*1024) {
712 return NULL
; /* Limit malloc to 1mb. */
714 if ((pai_buf
= talloc_array(talloc_tos(), char, pai_buf_size
)) == NULL
)
719 DEBUG(10,("load_inherited_info: ret = %lu for file %s\n",
720 (unsigned long)ret
, smb_fname
->base_name
));
723 /* No attribute or not supported. */
725 if (errno
!= ENOATTR
)
726 DEBUG(10,("load_inherited_info: Error %s\n", strerror(errno
) ));
729 DEBUG(10,("load_inherited_info: Error %s\n", strerror(errno
) ));
731 TALLOC_FREE(pai_buf
);
735 paiv
= create_pai_val(pai_buf
, ret
);
738 DEBUG(10,("load_inherited_info: ACL type 0x%x for file %s\n",
739 (unsigned int)paiv
->sd_type
,
740 smb_fname
->base_name
));
743 TALLOC_FREE(pai_buf
);
747 /****************************************************************************
748 Functions to manipulate the internal ACE format.
749 ****************************************************************************/
751 /****************************************************************************
752 Count a linked list of canonical ACE entries.
753 ****************************************************************************/
755 static size_t count_canon_ace_list( canon_ace
*l_head
)
760 for (ace
= l_head
; ace
; ace
= ace
->next
)
766 /****************************************************************************
767 Free a linked list of canonical ACE entries.
768 ****************************************************************************/
770 static void free_canon_ace_list( canon_ace
*l_head
)
772 canon_ace
*list
, *next
;
774 for (list
= l_head
; list
; list
= next
) {
776 DLIST_REMOVE(l_head
, list
);
781 /****************************************************************************
782 Function to duplicate a canon_ace entry.
783 ****************************************************************************/
785 static canon_ace
*dup_canon_ace( canon_ace
*src_ace
)
787 canon_ace
*dst_ace
= talloc(talloc_tos(), canon_ace
);
793 dst_ace
->prev
= dst_ace
->next
= NULL
;
797 /****************************************************************************
798 Print out a canon ace.
799 ****************************************************************************/
801 static void print_canon_ace(canon_ace
*pace
, int num
)
803 struct dom_sid_buf buf
;
804 dbgtext( "canon_ace index %d. Type = %s ", num
, pace
->attr
== ALLOW_ACE
? "allow" : "deny" );
805 dbgtext( "SID = %s ", dom_sid_str_buf(&pace
->trustee
, &buf
));
806 if (pace
->owner_type
== UID_ACE
) {
807 dbgtext( "uid %u ", (unsigned int)pace
->unix_ug
.id
);
808 } else if (pace
->owner_type
== GID_ACE
) {
809 dbgtext( "gid %u ", (unsigned int)pace
->unix_ug
.id
);
812 switch (pace
->type
) {
814 dbgtext( "SMB_ACL_USER ");
816 case SMB_ACL_USER_OBJ
:
817 dbgtext( "SMB_ACL_USER_OBJ ");
820 dbgtext( "SMB_ACL_GROUP ");
822 case SMB_ACL_GROUP_OBJ
:
823 dbgtext( "SMB_ACL_GROUP_OBJ ");
826 dbgtext( "SMB_ACL_OTHER ");
833 dbgtext( "ace_flags = 0x%x ", (unsigned int)pace
->ace_flags
);
835 dbgtext( "%c", pace
->perms
& S_IRUSR
? 'r' : '-');
836 dbgtext( "%c", pace
->perms
& S_IWUSR
? 'w' : '-');
837 dbgtext( "%c\n", pace
->perms
& S_IXUSR
? 'x' : '-');
840 /****************************************************************************
841 Print out a canon ace list.
842 ****************************************************************************/
844 static void print_canon_ace_list(const char *name
, canon_ace
*ace_list
)
848 if( DEBUGLVL( 10 )) {
849 dbgtext( "print_canon_ace_list: %s\n", name
);
850 for (;ace_list
; ace_list
= ace_list
->next
, count
++)
851 print_canon_ace(ace_list
, count
);
855 /****************************************************************************
856 Map POSIX ACL perms to canon_ace permissions (a mode_t containing only S_(R|W|X)USR bits).
857 ****************************************************************************/
859 static mode_t
convert_permset_to_mode_t(SMB_ACL_PERMSET_T permset
)
863 ret
|= (sys_acl_get_perm(permset
, SMB_ACL_READ
) ? S_IRUSR
: 0);
864 ret
|= (sys_acl_get_perm(permset
, SMB_ACL_WRITE
) ? S_IWUSR
: 0);
865 ret
|= (sys_acl_get_perm(permset
, SMB_ACL_EXECUTE
) ? S_IXUSR
: 0);
870 /****************************************************************************
871 Map generic UNIX permissions to canon_ace permissions (a mode_t containing only S_(R|W|X)USR bits).
872 ****************************************************************************/
874 mode_t
unix_perms_to_acl_perms(mode_t mode
, int r_mask
, int w_mask
, int x_mask
)
888 /****************************************************************************
889 Map canon_ace permissions (a mode_t containing only S_(R|W|X)USR bits) to
890 an SMB_ACL_PERMSET_T.
891 ****************************************************************************/
893 int map_acl_perms_to_permset(mode_t mode
, SMB_ACL_PERMSET_T
*p_permset
)
895 if (sys_acl_clear_perms(*p_permset
) == -1)
897 if (mode
& S_IRUSR
) {
898 if (sys_acl_add_perm(*p_permset
, SMB_ACL_READ
) == -1)
901 if (mode
& S_IWUSR
) {
902 if (sys_acl_add_perm(*p_permset
, SMB_ACL_WRITE
) == -1)
905 if (mode
& S_IXUSR
) {
906 if (sys_acl_add_perm(*p_permset
, SMB_ACL_EXECUTE
) == -1)
912 /****************************************************************************
913 Function to create owner and group SIDs from a SMB_STRUCT_STAT.
914 ****************************************************************************/
916 static void create_file_sids(const SMB_STRUCT_STAT
*psbuf
,
917 struct dom_sid
*powner_sid
,
918 struct dom_sid
*pgroup_sid
)
920 uid_to_sid( powner_sid
, psbuf
->st_ex_uid
);
921 gid_to_sid( pgroup_sid
, psbuf
->st_ex_gid
);
924 /****************************************************************************
925 Merge aces with a common UID or GID - if both are allow or deny, OR the permissions together and
926 delete the second one. If the first is deny, mask the permissions off and delete the allow
927 if the permissions become zero, delete the deny if the permissions are non zero.
928 ****************************************************************************/
930 static void merge_aces( canon_ace
**pp_list_head
, bool dir_acl
)
932 canon_ace
*l_head
= *pp_list_head
;
933 canon_ace
*curr_ace_outer
;
934 canon_ace
*curr_ace_outer_next
;
937 * First, merge allow entries with identical SIDs, and deny entries
938 * with identical SIDs.
941 for (curr_ace_outer
= l_head
; curr_ace_outer
; curr_ace_outer
= curr_ace_outer_next
) {
943 canon_ace
*curr_ace_next
;
945 curr_ace_outer_next
= curr_ace_outer
->next
; /* Save the link in case we delete. */
947 for (curr_ace
= curr_ace_outer
->next
; curr_ace
; curr_ace
= curr_ace_next
) {
948 bool can_merge
= false;
950 curr_ace_next
= curr_ace
->next
; /* Save the link in case of delete. */
952 /* For file ACLs we can merge if the SIDs and ALLOW/DENY
953 * types are the same. For directory acls we must also
954 * ensure the POSIX ACL types are the same.
956 * For the IDMAP_BOTH case, we must not merge
957 * the UID and GID ACE values for same SID
961 can_merge
= (curr_ace
->unix_ug
.id
== curr_ace_outer
->unix_ug
.id
&&
962 curr_ace
->owner_type
== curr_ace_outer
->owner_type
&&
963 (curr_ace
->attr
== curr_ace_outer
->attr
));
965 can_merge
= (curr_ace
->unix_ug
.id
== curr_ace_outer
->unix_ug
.id
&&
966 curr_ace
->owner_type
== curr_ace_outer
->owner_type
&&
967 (curr_ace
->type
== curr_ace_outer
->type
) &&
968 (curr_ace
->attr
== curr_ace_outer
->attr
));
972 if( DEBUGLVL( 10 )) {
973 dbgtext("merge_aces: Merging ACE's\n");
974 print_canon_ace( curr_ace_outer
, 0);
975 print_canon_ace( curr_ace
, 0);
978 /* Merge two allow or two deny ACE's. */
980 /* Theoretically we shouldn't merge a dir ACE if
981 * one ACE has the CI flag set, and the other
982 * ACE has the OI flag set, but this is rare
983 * enough we can ignore it. */
985 curr_ace_outer
->perms
|= curr_ace
->perms
;
986 curr_ace_outer
->ace_flags
|= curr_ace
->ace_flags
;
987 DLIST_REMOVE(l_head
, curr_ace
);
988 TALLOC_FREE(curr_ace
);
989 curr_ace_outer_next
= curr_ace_outer
->next
; /* We may have deleted the link. */
995 * Now go through and mask off allow permissions with deny permissions.
996 * We can delete either the allow or deny here as we know that each SID
997 * appears only once in the list.
1000 for (curr_ace_outer
= l_head
; curr_ace_outer
; curr_ace_outer
= curr_ace_outer_next
) {
1001 canon_ace
*curr_ace
;
1002 canon_ace
*curr_ace_next
;
1004 curr_ace_outer_next
= curr_ace_outer
->next
; /* Save the link in case we delete. */
1006 for (curr_ace
= curr_ace_outer
->next
; curr_ace
; curr_ace
= curr_ace_next
) {
1008 curr_ace_next
= curr_ace
->next
; /* Save the link in case of delete. */
1011 * Subtract ACE's with different entries. Due to the ordering constraints
1012 * we've put on the ACL, we know the deny must be the first one.
1015 if (curr_ace
->unix_ug
.id
== curr_ace_outer
->unix_ug
.id
&&
1016 (curr_ace
->owner_type
== curr_ace_outer
->owner_type
) &&
1017 (curr_ace_outer
->attr
== DENY_ACE
) && (curr_ace
->attr
== ALLOW_ACE
)) {
1019 if( DEBUGLVL( 10 )) {
1020 dbgtext("merge_aces: Masking ACE's\n");
1021 print_canon_ace( curr_ace_outer
, 0);
1022 print_canon_ace( curr_ace
, 0);
1025 curr_ace
->perms
&= ~curr_ace_outer
->perms
;
1027 if (curr_ace
->perms
== 0) {
1030 * The deny overrides the allow. Remove the allow.
1033 DLIST_REMOVE(l_head
, curr_ace
);
1034 TALLOC_FREE(curr_ace
);
1035 curr_ace_outer_next
= curr_ace_outer
->next
; /* We may have deleted the link. */
1040 * Even after removing permissions, there
1041 * are still allow permissions - delete the deny.
1042 * It is safe to delete the deny here,
1043 * as we are guarenteed by the deny first
1044 * ordering that all the deny entries for
1045 * this SID have already been merged into one
1046 * before we can get to an allow ace.
1049 DLIST_REMOVE(l_head
, curr_ace_outer
);
1050 TALLOC_FREE(curr_ace_outer
);
1055 } /* end for curr_ace */
1056 } /* end for curr_ace_outer */
1058 /* We may have modified the list. */
1060 *pp_list_head
= l_head
;
1063 /****************************************************************************
1064 Map canon_ace perms to permission bits NT.
1065 The attr element is not used here - we only process deny entries on set,
1066 not get. Deny entries are implicit on get with ace->perms = 0.
1067 ****************************************************************************/
1069 uint32_t map_canon_ace_perms(int snum
,
1070 enum security_ace_type
*pacl_type
,
1074 uint32_t nt_mask
= 0;
1076 *pacl_type
= SEC_ACE_TYPE_ACCESS_ALLOWED
;
1078 if (lp_acl_map_full_control(snum
) && ((perms
& ALL_ACE_PERMS
) == ALL_ACE_PERMS
)) {
1079 if (directory_ace
) {
1080 nt_mask
= UNIX_DIRECTORY_ACCESS_RWX
;
1082 nt_mask
= (UNIX_ACCESS_RWX
& ~DELETE_ACCESS
);
1084 } else if ((perms
& ALL_ACE_PERMS
) == (mode_t
)0) {
1086 * Windows NT refuses to display ACEs with no permissions in them (but
1087 * they are perfectly legal with Windows 2000). If the ACE has empty
1088 * permissions we cannot use 0, so we use the otherwise unused
1089 * WRITE_OWNER permission, which we ignore when we set an ACL.
1090 * We abstract this into a #define of UNIX_ACCESS_NONE to allow this
1091 * to be changed in the future.
1096 if (directory_ace
) {
1097 nt_mask
|= ((perms
& S_IRUSR
) ? UNIX_DIRECTORY_ACCESS_R
: 0 );
1098 nt_mask
|= ((perms
& S_IWUSR
) ? UNIX_DIRECTORY_ACCESS_W
: 0 );
1099 nt_mask
|= ((perms
& S_IXUSR
) ? UNIX_DIRECTORY_ACCESS_X
: 0 );
1101 nt_mask
|= ((perms
& S_IRUSR
) ? UNIX_ACCESS_R
: 0 );
1102 nt_mask
|= ((perms
& S_IWUSR
) ? UNIX_ACCESS_W
: 0 );
1103 nt_mask
|= ((perms
& S_IXUSR
) ? UNIX_ACCESS_X
: 0 );
1107 if ((perms
& S_IWUSR
) && lp_dos_filemode(snum
)) {
1108 nt_mask
|= (SEC_STD_WRITE_DAC
|SEC_STD_WRITE_OWNER
|DELETE_ACCESS
);
1111 DEBUG(10,("map_canon_ace_perms: Mapped (UNIX) %x to (NT) %x\n",
1112 (unsigned int)perms
, (unsigned int)nt_mask
));
1117 /****************************************************************************
1118 Map NT perms to a UNIX mode_t.
1119 ****************************************************************************/
1121 #define FILE_SPECIFIC_READ_BITS (FILE_READ_DATA|FILE_READ_EA)
1122 #define FILE_SPECIFIC_WRITE_BITS (FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_WRITE_EA)
1123 #define FILE_SPECIFIC_EXECUTE_BITS (FILE_EXECUTE)
1125 static mode_t
map_nt_perms( uint32_t *mask
, int type
)
1131 if((*mask
) & GENERIC_ALL_ACCESS
)
1132 mode
= S_IRUSR
|S_IWUSR
|S_IXUSR
;
1134 mode
|= ((*mask
) & (GENERIC_READ_ACCESS
|FILE_SPECIFIC_READ_BITS
)) ? S_IRUSR
: 0;
1135 mode
|= ((*mask
) & (GENERIC_WRITE_ACCESS
|FILE_SPECIFIC_WRITE_BITS
)) ? S_IWUSR
: 0;
1136 mode
|= ((*mask
) & (GENERIC_EXECUTE_ACCESS
|FILE_SPECIFIC_EXECUTE_BITS
)) ? S_IXUSR
: 0;
1140 if((*mask
) & GENERIC_ALL_ACCESS
)
1141 mode
= S_IRGRP
|S_IWGRP
|S_IXGRP
;
1143 mode
|= ((*mask
) & (GENERIC_READ_ACCESS
|FILE_SPECIFIC_READ_BITS
)) ? S_IRGRP
: 0;
1144 mode
|= ((*mask
) & (GENERIC_WRITE_ACCESS
|FILE_SPECIFIC_WRITE_BITS
)) ? S_IWGRP
: 0;
1145 mode
|= ((*mask
) & (GENERIC_EXECUTE_ACCESS
|FILE_SPECIFIC_EXECUTE_BITS
)) ? S_IXGRP
: 0;
1149 if((*mask
) & GENERIC_ALL_ACCESS
)
1150 mode
= S_IROTH
|S_IWOTH
|S_IXOTH
;
1152 mode
|= ((*mask
) & (GENERIC_READ_ACCESS
|FILE_SPECIFIC_READ_BITS
)) ? S_IROTH
: 0;
1153 mode
|= ((*mask
) & (GENERIC_WRITE_ACCESS
|FILE_SPECIFIC_WRITE_BITS
)) ? S_IWOTH
: 0;
1154 mode
|= ((*mask
) & (GENERIC_EXECUTE_ACCESS
|FILE_SPECIFIC_EXECUTE_BITS
)) ? S_IXOTH
: 0;
1162 /****************************************************************************
1163 Unpack a struct security_descriptor into a UNIX owner and group.
1164 ****************************************************************************/
1166 NTSTATUS
unpack_nt_owners(struct connection_struct
*conn
,
1167 uid_t
*puser
, gid_t
*pgrp
,
1168 uint32_t security_info_sent
, const struct
1169 security_descriptor
*psd
)
1174 if(security_info_sent
== 0) {
1175 DEBUG(0,("unpack_nt_owners: no security info sent !\n"));
1176 return NT_STATUS_OK
;
1180 * Validate the owner and group SID's.
1183 DEBUG(5,("unpack_nt_owners: validating owner_sids.\n"));
1186 * Don't immediately fail if the owner sid cannot be validated.
1187 * This may be a group chown only set.
1190 if (security_info_sent
& SECINFO_OWNER
) {
1191 if (!sid_to_uid(psd
->owner_sid
, puser
)) {
1192 if (lp_force_unknown_acl_user(SNUM(conn
))) {
1193 /* this allows take ownership to work
1195 *puser
= get_current_uid(conn
);
1197 struct dom_sid_buf buf
;
1198 DBG_NOTICE("unable to validate"
1199 " owner sid for %s\n",
1200 dom_sid_str_buf(psd
->owner_sid
,
1202 return NT_STATUS_INVALID_OWNER
;
1205 DEBUG(3,("unpack_nt_owners: owner sid mapped to uid %u\n",
1206 (unsigned int)*puser
));
1210 * Don't immediately fail if the group sid cannot be validated.
1211 * This may be an owner chown only set.
1214 if (security_info_sent
& SECINFO_GROUP
) {
1215 if (!sid_to_gid(psd
->group_sid
, pgrp
)) {
1216 if (lp_force_unknown_acl_user(SNUM(conn
))) {
1217 /* this allows take group ownership to work
1219 *pgrp
= get_current_gid(conn
);
1221 DEBUG(3,("unpack_nt_owners: unable to validate"
1223 return NT_STATUS_INVALID_OWNER
;
1226 DEBUG(3,("unpack_nt_owners: group sid mapped to gid %u\n",
1227 (unsigned int)*pgrp
));
1230 DEBUG(5,("unpack_nt_owners: owner_sids validated.\n"));
1232 return NT_STATUS_OK
;
1236 static void trim_ace_perms(canon_ace
*pace
)
1238 pace
->perms
= pace
->perms
& (S_IXUSR
|S_IWUSR
|S_IRUSR
);
1241 static void ensure_minimal_owner_ace_perms(const bool is_directory
,
1244 pace
->perms
|= S_IRUSR
;
1246 pace
->perms
|= (S_IWUSR
|S_IXUSR
);
1250 /****************************************************************************
1251 Check if a given uid/SID is in a group gid/SID. This is probably very
1252 expensive and will need optimisation. A *lot* of optimisation :-). JRA.
1253 ****************************************************************************/
1255 static bool uid_entry_in_group(connection_struct
*conn
, canon_ace
*uid_ace
, canon_ace
*group_ace
)
1257 bool is_sid
= false;
1258 bool has_sid
= false;
1259 struct security_token
*security_token
= NULL
;
1261 /* "Everyone" always matches every uid. */
1263 if (dom_sid_equal(&group_ace
->trustee
, &global_sid_World
))
1266 security_token
= conn
->session_info
->security_token
;
1267 /* security_token should not be NULL */
1268 SMB_ASSERT(security_token
);
1269 is_sid
= security_token_is_sid(security_token
,
1272 has_sid
= security_token_has_sid(security_token
,
1273 &group_ace
->trustee
);
1281 * if it's the current user, we already have the unix token
1282 * and don't need to do the complex user_in_group_sid() call
1284 if (uid_ace
->unix_ug
.id
== get_current_uid(conn
)) {
1285 const struct security_unix_token
*curr_utok
= NULL
;
1288 if (group_ace
->unix_ug
.id
== get_current_gid(conn
)) {
1292 curr_utok
= get_current_utok(conn
);
1293 for (i
=0; i
< curr_utok
->ngroups
; i
++) {
1294 if (group_ace
->unix_ug
.id
== curr_utok
->groups
[i
]) {
1301 * user_in_group_sid() uses create_token_from_sid()
1302 * which creates an artificial NT token given just a username,
1303 * so this is not reliable for users from foreign domains
1304 * exported by winbindd!
1306 return user_sid_in_group_sid(&uid_ace
->trustee
, &group_ace
->trustee
);
1309 /****************************************************************************
1310 A well formed POSIX file or default ACL has at least 3 entries, a
1311 SMB_ACL_USER_OBJ, SMB_ACL_GROUP_OBJ, SMB_ACL_OTHER_OBJ.
1312 In addition, the owner must always have at least read access.
1313 When using this call on get_acl, the pst struct is valid and contains
1314 the mode of the file.
1315 ****************************************************************************/
1317 static bool ensure_canon_entry_valid_on_get(connection_struct
*conn
,
1319 const struct dom_sid
*pfile_owner_sid
,
1320 const struct dom_sid
*pfile_grp_sid
,
1321 const SMB_STRUCT_STAT
*pst
)
1324 bool got_user
= false;
1325 bool got_group
= false;
1326 bool got_other
= false;
1328 for (pace
= *pp_ace
; pace
; pace
= pace
->next
) {
1329 if (pace
->type
== SMB_ACL_USER_OBJ
) {
1331 } else if (pace
->type
== SMB_ACL_GROUP_OBJ
) {
1333 } else if (pace
->type
== SMB_ACL_OTHER
) {
1339 if ((pace
= talloc(talloc_tos(), canon_ace
)) == NULL
) {
1340 DEBUG(0,("malloc fail.\n"));
1345 pace
->type
= SMB_ACL_USER_OBJ
;
1346 pace
->owner_type
= UID_ACE
;
1347 pace
->unix_ug
.type
= ID_TYPE_UID
;
1348 pace
->unix_ug
.id
= pst
->st_ex_uid
;
1349 pace
->trustee
= *pfile_owner_sid
;
1350 pace
->attr
= ALLOW_ACE
;
1351 pace
->perms
= unix_perms_to_acl_perms(pst
->st_ex_mode
, S_IRUSR
, S_IWUSR
, S_IXUSR
);
1352 DLIST_ADD(*pp_ace
, pace
);
1356 if ((pace
= talloc(talloc_tos(), canon_ace
)) == NULL
) {
1357 DEBUG(0,("malloc fail.\n"));
1362 pace
->type
= SMB_ACL_GROUP_OBJ
;
1363 pace
->owner_type
= GID_ACE
;
1364 pace
->unix_ug
.type
= ID_TYPE_GID
;
1365 pace
->unix_ug
.id
= pst
->st_ex_gid
;
1366 pace
->trustee
= *pfile_grp_sid
;
1367 pace
->attr
= ALLOW_ACE
;
1368 pace
->perms
= unix_perms_to_acl_perms(pst
->st_ex_mode
, S_IRGRP
, S_IWGRP
, S_IXGRP
);
1369 DLIST_ADD(*pp_ace
, pace
);
1373 if ((pace
= talloc(talloc_tos(), canon_ace
)) == NULL
) {
1374 DEBUG(0,("malloc fail.\n"));
1379 pace
->type
= SMB_ACL_OTHER
;
1380 pace
->owner_type
= WORLD_ACE
;
1381 pace
->unix_ug
.type
= ID_TYPE_NOT_SPECIFIED
;
1382 pace
->unix_ug
.id
= -1;
1383 pace
->trustee
= global_sid_World
;
1384 pace
->attr
= ALLOW_ACE
;
1385 pace
->perms
= unix_perms_to_acl_perms(pst
->st_ex_mode
, S_IROTH
, S_IWOTH
, S_IXOTH
);
1386 DLIST_ADD(*pp_ace
, pace
);
1392 /****************************************************************************
1393 A well formed POSIX file or default ACL has at least 3 entries, a
1394 SMB_ACL_USER_OBJ, SMB_ACL_GROUP_OBJ, SMB_ACL_OTHER_OBJ.
1395 In addition, the owner must always have at least read access.
1396 When using this call on set_acl, the pst struct has
1397 been modified to have a mode containing the default for this file or directory
1399 ****************************************************************************/
1401 static bool ensure_canon_entry_valid_on_set(connection_struct
*conn
,
1403 bool is_default_acl
,
1404 const struct share_params
*params
,
1405 const bool is_directory
,
1406 const struct dom_sid
*pfile_owner_sid
,
1407 const struct dom_sid
*pfile_grp_sid
,
1408 const SMB_STRUCT_STAT
*pst
)
1411 canon_ace
*pace_user
= NULL
;
1412 canon_ace
*pace_group
= NULL
;
1413 canon_ace
*pace_other
= NULL
;
1414 bool got_duplicate_user
= false;
1415 bool got_duplicate_group
= false;
1417 for (pace
= *pp_ace
; pace
; pace
= pace
->next
) {
1418 trim_ace_perms(pace
);
1419 if (pace
->type
== SMB_ACL_USER_OBJ
) {
1420 ensure_minimal_owner_ace_perms(is_directory
, pace
);
1422 } else if (pace
->type
== SMB_ACL_GROUP_OBJ
) {
1424 } else if (pace
->type
== SMB_ACL_OTHER
) {
1430 canon_ace
*pace_iter
;
1432 if ((pace
= talloc(talloc_tos(), canon_ace
)) == NULL
) {
1433 DEBUG(0,("talloc fail.\n"));
1438 pace
->type
= SMB_ACL_USER_OBJ
;
1439 pace
->owner_type
= UID_ACE
;
1440 pace
->unix_ug
.type
= ID_TYPE_UID
;
1441 pace
->unix_ug
.id
= pst
->st_ex_uid
;
1442 pace
->trustee
= *pfile_owner_sid
;
1443 pace
->attr
= ALLOW_ACE
;
1444 /* Start with existing user permissions, principle of least
1445 surprises for the user. */
1446 pace
->perms
= unix_perms_to_acl_perms(pst
->st_ex_mode
, S_IRUSR
, S_IWUSR
, S_IXUSR
);
1448 /* See if the owning user is in any of the other groups in
1449 the ACE, or if there's a matching user entry (by uid
1450 or in the case of ID_TYPE_BOTH by SID).
1451 If so, OR in the permissions from that entry. */
1454 for (pace_iter
= *pp_ace
; pace_iter
; pace_iter
= pace_iter
->next
) {
1455 if (pace_iter
->type
== SMB_ACL_USER
&&
1456 pace_iter
->unix_ug
.id
== pace
->unix_ug
.id
) {
1457 pace
->perms
|= pace_iter
->perms
;
1458 } else if (pace_iter
->type
== SMB_ACL_GROUP_OBJ
|| pace_iter
->type
== SMB_ACL_GROUP
) {
1459 if (dom_sid_equal(&pace
->trustee
, &pace_iter
->trustee
)) {
1460 pace
->perms
|= pace_iter
->perms
;
1461 } else if (uid_entry_in_group(conn
, pace
, pace_iter
)) {
1462 pace
->perms
|= pace_iter
->perms
;
1467 if (pace
->perms
== 0) {
1468 /* If we only got an "everyone" perm, just use that. */
1470 pace
->perms
= pace_other
->perms
;
1474 * Ensure we have default parameters for the
1475 * user (owner) even on default ACLs.
1477 ensure_minimal_owner_ace_perms(is_directory
, pace
);
1479 DLIST_ADD(*pp_ace
, pace
);
1484 if ((pace
= talloc(talloc_tos(), canon_ace
)) == NULL
) {
1485 DEBUG(0,("talloc fail.\n"));
1490 pace
->type
= SMB_ACL_GROUP_OBJ
;
1491 pace
->owner_type
= GID_ACE
;
1492 pace
->unix_ug
.type
= ID_TYPE_GID
;
1493 pace
->unix_ug
.id
= pst
->st_ex_gid
;
1494 pace
->trustee
= *pfile_grp_sid
;
1495 pace
->attr
= ALLOW_ACE
;
1497 /* If we only got an "everyone" perm, just use that. */
1499 pace
->perms
= pace_other
->perms
;
1504 DLIST_ADD(*pp_ace
, pace
);
1509 if ((pace
= talloc(talloc_tos(), canon_ace
)) == NULL
) {
1510 DEBUG(0,("talloc fail.\n"));
1515 pace
->type
= SMB_ACL_OTHER
;
1516 pace
->owner_type
= WORLD_ACE
;
1517 pace
->unix_ug
.type
= ID_TYPE_NOT_SPECIFIED
;
1518 pace
->unix_ug
.id
= -1;
1519 pace
->trustee
= global_sid_World
;
1520 pace
->attr
= ALLOW_ACE
;
1523 DLIST_ADD(*pp_ace
, pace
);
1527 /* Ensure when setting a POSIX ACL, that the uid for a
1528 SMB_ACL_USER_OBJ ACE (the owner ACE entry) has a duplicate
1529 permission entry as an SMB_ACL_USER, and a gid for a
1530 SMB_ACL_GROUP_OBJ ACE (the primary group ACE entry) also has
1531 a duplicate permission entry as an SMB_ACL_GROUP. If not,
1532 then if the ownership or group ownership of this file or
1533 directory gets changed, the user or group can lose their
1536 for (pace
= *pp_ace
; pace
; pace
= pace
->next
) {
1537 if (pace
->type
== SMB_ACL_USER
&&
1538 pace
->unix_ug
.id
== pace_user
->unix_ug
.id
) {
1539 /* Already got one. */
1540 got_duplicate_user
= true;
1541 } else if (pace
->type
== SMB_ACL_GROUP
&&
1542 pace
->unix_ug
.id
== pace_group
->unix_ug
.id
) {
1543 /* Already got one. */
1544 got_duplicate_group
= true;
1545 } else if ((pace
->type
== SMB_ACL_GROUP
)
1546 && (dom_sid_equal(&pace
->trustee
, &pace_user
->trustee
))) {
1547 /* If the SID owning the file appears
1548 * in a group entry, then we have
1549 * enough duplication, they will still
1551 got_duplicate_user
= true;
1555 /* If the SID is equal for the user and group that we need
1556 to add the duplicate for, add only the group */
1557 if (!got_duplicate_user
&& !got_duplicate_group
1558 && dom_sid_equal(&pace_group
->trustee
,
1559 &pace_user
->trustee
)) {
1560 /* Add a duplicate SMB_ACL_GROUP entry, this
1561 * will cover the owning SID as well, as it
1562 * will always be mapped to both a uid and
1565 if ((pace
= talloc(talloc_tos(), canon_ace
)) == NULL
) {
1566 DEBUG(0,("talloc fail.\n"));
1571 pace
->type
= SMB_ACL_GROUP
;;
1572 pace
->owner_type
= GID_ACE
;
1573 pace
->unix_ug
.type
= ID_TYPE_GID
;
1574 pace
->unix_ug
.id
= pace_group
->unix_ug
.id
;
1575 pace
->trustee
= pace_group
->trustee
;
1576 pace
->attr
= pace_group
->attr
;
1577 pace
->perms
= pace_group
->perms
;
1579 DLIST_ADD(*pp_ace
, pace
);
1581 /* We're done here, make sure the
1582 statements below are not executed. */
1583 got_duplicate_user
= true;
1584 got_duplicate_group
= true;
1587 if (!got_duplicate_user
) {
1588 /* Add a duplicate SMB_ACL_USER entry. */
1589 if ((pace
= talloc(talloc_tos(), canon_ace
)) == NULL
) {
1590 DEBUG(0,("talloc fail.\n"));
1595 pace
->type
= SMB_ACL_USER
;;
1596 pace
->owner_type
= UID_ACE
;
1597 pace
->unix_ug
.type
= ID_TYPE_UID
;
1598 pace
->unix_ug
.id
= pace_user
->unix_ug
.id
;
1599 pace
->trustee
= pace_user
->trustee
;
1600 pace
->attr
= pace_user
->attr
;
1601 pace
->perms
= pace_user
->perms
;
1603 DLIST_ADD(*pp_ace
, pace
);
1605 got_duplicate_user
= true;
1608 if (!got_duplicate_group
) {
1609 /* Add a duplicate SMB_ACL_GROUP entry. */
1610 if ((pace
= talloc(talloc_tos(), canon_ace
)) == NULL
) {
1611 DEBUG(0,("talloc fail.\n"));
1616 pace
->type
= SMB_ACL_GROUP
;;
1617 pace
->owner_type
= GID_ACE
;
1618 pace
->unix_ug
.type
= ID_TYPE_GID
;
1619 pace
->unix_ug
.id
= pace_group
->unix_ug
.id
;
1620 pace
->trustee
= pace_group
->trustee
;
1621 pace
->attr
= pace_group
->attr
;
1622 pace
->perms
= pace_group
->perms
;
1624 DLIST_ADD(*pp_ace
, pace
);
1626 got_duplicate_group
= true;
1632 /****************************************************************************
1633 Check if a POSIX ACL has the required SMB_ACL_USER_OBJ and SMB_ACL_GROUP_OBJ entries.
1634 If it does not have them, check if there are any entries where the trustee is the
1635 file owner or the owning group, and map these to SMB_ACL_USER_OBJ and SMB_ACL_GROUP_OBJ.
1636 Note we must not do this to default directory ACLs.
1637 ****************************************************************************/
1639 static void check_owning_objs(canon_ace
*ace
, struct dom_sid
*pfile_owner_sid
, struct dom_sid
*pfile_grp_sid
)
1641 bool got_user_obj
, got_group_obj
;
1642 canon_ace
*current_ace
;
1645 entries
= count_canon_ace_list(ace
);
1646 got_user_obj
= False
;
1647 got_group_obj
= False
;
1649 for (i
=0, current_ace
= ace
; i
< entries
; i
++, current_ace
= current_ace
->next
) {
1650 if (current_ace
->type
== SMB_ACL_USER_OBJ
)
1651 got_user_obj
= True
;
1652 else if (current_ace
->type
== SMB_ACL_GROUP_OBJ
)
1653 got_group_obj
= True
;
1655 if (got_user_obj
&& got_group_obj
) {
1656 DEBUG(10,("check_owning_objs: ACL had owning user/group entries.\n"));
1660 for (i
=0, current_ace
= ace
; i
< entries
; i
++, current_ace
= current_ace
->next
) {
1661 if (!got_user_obj
&& current_ace
->owner_type
== UID_ACE
&&
1662 dom_sid_equal(¤t_ace
->trustee
, pfile_owner_sid
)) {
1663 current_ace
->type
= SMB_ACL_USER_OBJ
;
1664 got_user_obj
= True
;
1666 if (!got_group_obj
&& current_ace
->owner_type
== GID_ACE
&&
1667 dom_sid_equal(¤t_ace
->trustee
, pfile_grp_sid
)) {
1668 current_ace
->type
= SMB_ACL_GROUP_OBJ
;
1669 got_group_obj
= True
;
1673 DEBUG(10,("check_owning_objs: ACL is missing an owner entry.\n"));
1675 DEBUG(10,("check_owning_objs: ACL is missing an owning group entry.\n"));
1678 static bool add_current_ace_to_acl(files_struct
*fsp
, struct security_ace
*psa
,
1679 canon_ace
**file_ace
, canon_ace
**dir_ace
,
1680 bool *got_file_allow
, bool *got_dir_allow
,
1681 bool *all_aces_are_inherit_only
,
1682 canon_ace
*current_ace
)
1686 * Map the given NT permissions into a UNIX mode_t containing only
1687 * S_I(R|W|X)USR bits.
1690 current_ace
->perms
|= map_nt_perms( &psa
->access_mask
, S_IRUSR
);
1691 current_ace
->attr
= (psa
->type
== SEC_ACE_TYPE_ACCESS_ALLOWED
) ? ALLOW_ACE
: DENY_ACE
;
1693 /* Store the ace_flag. */
1694 current_ace
->ace_flags
= psa
->flags
;
1697 * Now add the created ace to either the file list, the directory
1698 * list, or both. We *MUST* preserve the order here (hence we use
1699 * DLIST_ADD_END) as NT ACLs are order dependent.
1702 if (fsp
->fsp_flags
.is_directory
) {
1705 * We can only add to the default POSIX ACE list if the ACE is
1706 * designed to be inherited by both files and directories.
1709 if ((psa
->flags
& (SEC_ACE_FLAG_OBJECT_INHERIT
|SEC_ACE_FLAG_CONTAINER_INHERIT
)) ==
1710 (SEC_ACE_FLAG_OBJECT_INHERIT
|SEC_ACE_FLAG_CONTAINER_INHERIT
)) {
1712 canon_ace
*current_dir_ace
= current_ace
;
1713 DLIST_ADD_END(*dir_ace
, current_ace
);
1716 * Note if this was an allow ace. We can't process
1717 * any further deny ace's after this.
1720 if (current_ace
->attr
== ALLOW_ACE
)
1721 *got_dir_allow
= True
;
1723 if ((current_ace
->attr
== DENY_ACE
) && *got_dir_allow
) {
1724 DEBUG(0,("add_current_ace_to_acl: "
1726 "inheritable ACL! Deny entry "
1727 "after Allow entry. Failing "
1728 "to set on file %s.\n",
1733 if( DEBUGLVL( 10 )) {
1734 dbgtext("add_current_ace_to_acl: adding dir ACL:\n");
1735 print_canon_ace( current_ace
, 0);
1739 * If this is not an inherit only ACE we need to add a duplicate
1743 if (!(psa
->flags
& SEC_ACE_FLAG_INHERIT_ONLY
)) {
1744 canon_ace
*dup_ace
= dup_canon_ace(current_ace
);
1747 DEBUG(0,("add_current_ace_to_acl: malloc fail !\n"));
1752 * We must not free current_ace here as its
1753 * pointer is now owned by the dir_ace list.
1755 current_ace
= dup_ace
;
1756 /* We've essentially split this ace into two,
1757 * and added the ace with inheritance request
1758 * bits to the directory ACL. Drop those bits for
1759 * the ACE we're adding to the file list. */
1760 current_ace
->ace_flags
&= ~(SEC_ACE_FLAG_OBJECT_INHERIT
|
1761 SEC_ACE_FLAG_CONTAINER_INHERIT
|
1762 SEC_ACE_FLAG_INHERIT_ONLY
);
1765 * We must not free current_ace here as its
1766 * pointer is now owned by the dir_ace list.
1772 * current_ace is now either owned by file_ace
1773 * or is NULL. We can safely operate on current_dir_ace
1774 * to treat mapping for default acl entries differently
1775 * than access acl entries.
1778 if (current_dir_ace
->owner_type
== UID_ACE
) {
1780 * We already decided above this is a uid,
1781 * for default acls ace's only CREATOR_OWNER
1782 * maps to ACL_USER_OBJ. All other uid
1783 * ace's are ACL_USER.
1785 if (dom_sid_equal(¤t_dir_ace
->trustee
,
1786 &global_sid_Creator_Owner
)) {
1787 current_dir_ace
->type
= SMB_ACL_USER_OBJ
;
1789 current_dir_ace
->type
= SMB_ACL_USER
;
1793 if (current_dir_ace
->owner_type
== GID_ACE
) {
1795 * We already decided above this is a gid,
1796 * for default acls ace's only CREATOR_GROUP
1797 * maps to ACL_GROUP_OBJ. All other uid
1798 * ace's are ACL_GROUP.
1800 if (dom_sid_equal(¤t_dir_ace
->trustee
,
1801 &global_sid_Creator_Group
)) {
1802 current_dir_ace
->type
= SMB_ACL_GROUP_OBJ
;
1804 current_dir_ace
->type
= SMB_ACL_GROUP
;
1811 * Only add to the file ACL if not inherit only.
1814 if (current_ace
&& !(psa
->flags
& SEC_ACE_FLAG_INHERIT_ONLY
)) {
1815 DLIST_ADD_END(*file_ace
, current_ace
);
1818 * Note if this was an allow ace. We can't process
1819 * any further deny ace's after this.
1822 if (current_ace
->attr
== ALLOW_ACE
)
1823 *got_file_allow
= True
;
1825 if ((current_ace
->attr
== DENY_ACE
) && *got_file_allow
) {
1826 DEBUG(0,("add_current_ace_to_acl: malformed "
1827 "ACL in file ACL ! Deny entry after "
1828 "Allow entry. Failing to set on file "
1829 "%s.\n", fsp_str_dbg(fsp
)));
1833 if( DEBUGLVL( 10 )) {
1834 dbgtext("add_current_ace_to_acl: adding file ACL:\n");
1835 print_canon_ace( current_ace
, 0);
1837 *all_aces_are_inherit_only
= False
;
1839 * We must not free current_ace here as its
1840 * pointer is now owned by the file_ace list.
1846 * Free if ACE was not added.
1849 TALLOC_FREE(current_ace
);
1853 /****************************************************************************
1854 Unpack a struct security_descriptor into two canonical ace lists.
1855 ****************************************************************************/
1857 static bool create_canon_ace_lists(files_struct
*fsp
,
1858 const SMB_STRUCT_STAT
*pst
,
1859 struct dom_sid
*pfile_owner_sid
,
1860 struct dom_sid
*pfile_grp_sid
,
1861 canon_ace
**ppfile_ace
,
1862 canon_ace
**ppdir_ace
,
1863 const struct security_acl
*dacl
)
1865 bool all_aces_are_inherit_only
= (fsp
->fsp_flags
.is_directory
);
1866 canon_ace
*file_ace
= NULL
;
1867 canon_ace
*dir_ace
= NULL
;
1868 canon_ace
*current_ace
= NULL
;
1869 bool got_dir_allow
= False
;
1870 bool got_file_allow
= False
;
1877 * Convert the incoming ACL into a more regular form.
1880 for(i
= 0; i
< dacl
->num_aces
; i
++) {
1881 struct security_ace
*psa
= &dacl
->aces
[i
];
1883 if((psa
->type
!= SEC_ACE_TYPE_ACCESS_ALLOWED
) && (psa
->type
!= SEC_ACE_TYPE_ACCESS_DENIED
)) {
1884 DEBUG(3,("create_canon_ace_lists: unable to set anything but an ALLOW or DENY ACE.\n"));
1890 * Deal with the fact that NT 4.x re-writes the canonical format
1891 * that we return for default ACLs. If a directory ACE is identical
1892 * to a inherited directory ACE then NT changes the bits so that the
1893 * first ACE is set to OI|IO and the second ACE for this SID is set
1894 * to CI. We need to repair this. JRA.
1897 for(i
= 0; i
< dacl
->num_aces
; i
++) {
1898 struct security_ace
*psa1
= &dacl
->aces
[i
];
1900 for (j
= i
+ 1; j
< dacl
->num_aces
; j
++) {
1901 struct security_ace
*psa2
= &dacl
->aces
[j
];
1903 if (psa1
->access_mask
!= psa2
->access_mask
)
1906 if (!dom_sid_equal(&psa1
->trustee
, &psa2
->trustee
))
1910 * Ok - permission bits and SIDs are equal.
1911 * Check if flags were re-written.
1914 if (psa1
->flags
& SEC_ACE_FLAG_INHERIT_ONLY
) {
1916 psa1
->flags
|= (psa2
->flags
& (SEC_ACE_FLAG_CONTAINER_INHERIT
|SEC_ACE_FLAG_OBJECT_INHERIT
));
1917 psa2
->flags
&= ~(SEC_ACE_FLAG_CONTAINER_INHERIT
|SEC_ACE_FLAG_OBJECT_INHERIT
);
1919 } else if (psa2
->flags
& SEC_ACE_FLAG_INHERIT_ONLY
) {
1921 psa2
->flags
|= (psa1
->flags
& (SEC_ACE_FLAG_CONTAINER_INHERIT
|SEC_ACE_FLAG_OBJECT_INHERIT
));
1922 psa1
->flags
&= ~(SEC_ACE_FLAG_CONTAINER_INHERIT
|SEC_ACE_FLAG_OBJECT_INHERIT
);
1928 for(i
= 0; i
< dacl
->num_aces
; i
++) {
1929 struct security_ace
*psa
= &dacl
->aces
[i
];
1932 * Create a canon_ace entry representing this NT DACL ACE.
1935 if ((current_ace
= talloc(talloc_tos(), canon_ace
)) == NULL
) {
1936 free_canon_ace_list(file_ace
);
1937 free_canon_ace_list(dir_ace
);
1938 DEBUG(0,("create_canon_ace_lists: malloc fail.\n"));
1942 ZERO_STRUCTP(current_ace
);
1944 sid_copy(¤t_ace
->trustee
, &psa
->trustee
);
1947 * Try and work out if the SID is a user or group
1948 * as we need to flag these differently for POSIX.
1949 * Note what kind of a POSIX ACL this should map to.
1952 if( dom_sid_equal(¤t_ace
->trustee
, &global_sid_World
)) {
1953 current_ace
->owner_type
= WORLD_ACE
;
1954 current_ace
->unix_ug
.type
= ID_TYPE_NOT_SPECIFIED
;
1955 current_ace
->unix_ug
.id
= -1;
1956 current_ace
->type
= SMB_ACL_OTHER
;
1957 } else if (dom_sid_equal(¤t_ace
->trustee
, &global_sid_Creator_Owner
)) {
1958 current_ace
->owner_type
= UID_ACE
;
1959 current_ace
->unix_ug
.type
= ID_TYPE_UID
;
1960 current_ace
->unix_ug
.id
= pst
->st_ex_uid
;
1961 current_ace
->type
= SMB_ACL_USER_OBJ
;
1964 * The Creator Owner entry only specifies inheritable permissions,
1965 * never access permissions. WinNT doesn't always set the ACE to
1966 * INHERIT_ONLY, though.
1969 psa
->flags
|= SEC_ACE_FLAG_INHERIT_ONLY
;
1971 } else if (dom_sid_equal(¤t_ace
->trustee
, &global_sid_Creator_Group
)) {
1972 current_ace
->owner_type
= GID_ACE
;
1973 current_ace
->unix_ug
.type
= ID_TYPE_GID
;
1974 current_ace
->unix_ug
.id
= pst
->st_ex_gid
;
1975 current_ace
->type
= SMB_ACL_GROUP_OBJ
;
1978 * The Creator Group entry only specifies inheritable permissions,
1979 * never access permissions. WinNT doesn't always set the ACE to
1980 * INHERIT_ONLY, though.
1982 psa
->flags
|= SEC_ACE_FLAG_INHERIT_ONLY
;
1985 struct unixid unixid
;
1987 if (!sids_to_unixids(¤t_ace
->trustee
, 1, &unixid
)) {
1988 struct dom_sid_buf buf
;
1989 free_canon_ace_list(file_ace
);
1990 free_canon_ace_list(dir_ace
);
1991 TALLOC_FREE(current_ace
);
1992 DBG_ERR("sids_to_unixids failed for %s "
1993 "(allocation failure)\n",
1994 dom_sid_str_buf(¤t_ace
->trustee
,
1999 if (unixid
.type
== ID_TYPE_BOTH
) {
2001 * We must add both a user and group
2003 * This is due to the fact that in POSIX
2004 * user entries are more specific than
2007 current_ace
->owner_type
= UID_ACE
;
2008 current_ace
->unix_ug
.type
= ID_TYPE_UID
;
2009 current_ace
->unix_ug
.id
= unixid
.id
;
2011 (unixid
.id
== pst
->st_ex_uid
) ?
2015 /* Add the user object to the posix ACL,
2016 and proceed to the group mapping
2017 below. This handles the talloc_free
2018 of current_ace if not added for some
2020 if (!add_current_ace_to_acl(fsp
,
2026 &all_aces_are_inherit_only
,
2028 free_canon_ace_list(file_ace
);
2029 free_canon_ace_list(dir_ace
);
2033 if ((current_ace
= talloc(talloc_tos(),
2034 canon_ace
)) == NULL
) {
2035 free_canon_ace_list(file_ace
);
2036 free_canon_ace_list(dir_ace
);
2037 DEBUG(0,("create_canon_ace_lists: "
2042 ZERO_STRUCTP(current_ace
);
2044 sid_copy(¤t_ace
->trustee
, &psa
->trustee
);
2046 current_ace
->unix_ug
.type
= ID_TYPE_GID
;
2047 current_ace
->unix_ug
.id
= unixid
.id
;
2048 current_ace
->owner_type
= GID_ACE
;
2049 /* If it's the primary group, this is a
2050 group_obj, not a group. */
2051 if (current_ace
->unix_ug
.id
== pst
->st_ex_gid
) {
2052 current_ace
->type
= SMB_ACL_GROUP_OBJ
;
2054 current_ace
->type
= SMB_ACL_GROUP
;
2057 } else if (unixid
.type
== ID_TYPE_UID
) {
2058 current_ace
->owner_type
= UID_ACE
;
2059 current_ace
->unix_ug
.type
= ID_TYPE_UID
;
2060 current_ace
->unix_ug
.id
= unixid
.id
;
2061 /* If it's the owning user, this is a user_obj,
2063 if (current_ace
->unix_ug
.id
== pst
->st_ex_uid
) {
2064 current_ace
->type
= SMB_ACL_USER_OBJ
;
2066 current_ace
->type
= SMB_ACL_USER
;
2068 } else if (unixid
.type
== ID_TYPE_GID
) {
2069 current_ace
->unix_ug
.type
= ID_TYPE_GID
;
2070 current_ace
->unix_ug
.id
= unixid
.id
;
2071 current_ace
->owner_type
= GID_ACE
;
2072 /* If it's the primary group, this is a
2073 group_obj, not a group. */
2074 if (current_ace
->unix_ug
.id
== pst
->st_ex_gid
) {
2075 current_ace
->type
= SMB_ACL_GROUP_OBJ
;
2077 current_ace
->type
= SMB_ACL_GROUP
;
2080 struct dom_sid_buf buf
;
2082 * Silently ignore map failures in non-mappable SIDs (NT Authority, BUILTIN etc).
2085 if (non_mappable_sid(&psa
->trustee
)) {
2086 DBG_DEBUG("ignoring "
2087 "non-mappable SID %s\n",
2091 TALLOC_FREE(current_ace
);
2095 if (lp_force_unknown_acl_user(SNUM(fsp
->conn
))) {
2096 DBG_DEBUG("ignoring unknown or "
2101 TALLOC_FREE(current_ace
);
2105 free_canon_ace_list(file_ace
);
2106 free_canon_ace_list(dir_ace
);
2107 DBG_ERR("unable to map SID %s to uid or "
2109 dom_sid_str_buf(¤t_ace
->trustee
,
2111 TALLOC_FREE(current_ace
);
2116 /* handles the talloc_free of current_ace if not added for some reason */
2117 if (!add_current_ace_to_acl(fsp
, psa
, &file_ace
, &dir_ace
,
2118 &got_file_allow
, &got_dir_allow
,
2119 &all_aces_are_inherit_only
, current_ace
)) {
2120 free_canon_ace_list(file_ace
);
2121 free_canon_ace_list(dir_ace
);
2126 if (fsp
->fsp_flags
.is_directory
&& all_aces_are_inherit_only
) {
2128 * Windows 2000 is doing one of these weird 'inherit acl'
2129 * traverses to conserve NTFS ACL resources. Just pretend
2130 * there was no DACL sent. JRA.
2133 DEBUG(10,("create_canon_ace_lists: Win2k inherit acl traverse. Ignoring DACL.\n"));
2134 free_canon_ace_list(file_ace
);
2135 free_canon_ace_list(dir_ace
);
2140 * Check if we have SMB_ACL_USER_OBJ and SMB_ACL_GROUP_OBJ entries in
2141 * the file ACL. If we don't have them, check if any SMB_ACL_USER/SMB_ACL_GROUP
2142 * entries can be converted to *_OBJ. Don't do this for the default
2143 * ACL, we will create them separately for this if needed inside
2144 * ensure_canon_entry_valid_on_set().
2147 check_owning_objs(file_ace
, pfile_owner_sid
, pfile_grp_sid
);
2151 *ppfile_ace
= file_ace
;
2152 *ppdir_ace
= dir_ace
;
2157 /****************************************************************************
2158 ASCII art time again... JRA :-).
2160 We have 4 cases to process when moving from an NT ACL to a POSIX ACL. Firstly,
2161 we insist the ACL is in canonical form (ie. all DENY entries preceede ALLOW
2162 entries). Secondly, the merge code has ensured that all duplicate SID entries for
2163 allow or deny have been merged, so the same SID can only appear once in the deny
2164 list or once in the allow list.
2166 We then process as follows :
2168 ---------------------------------------------------------------------------
2169 First pass - look for a Everyone DENY entry.
2171 If it is deny all (rwx) trunate the list at this point.
2172 Else, walk the list from this point and use the deny permissions of this
2173 entry as a mask on all following allow entries. Finally, delete
2174 the Everyone DENY entry (we have applied it to everything possible).
2176 In addition, in this pass we remove any DENY entries that have
2177 no permissions (ie. they are a DENY nothing).
2178 ---------------------------------------------------------------------------
2179 Second pass - only deal with deny user entries.
2181 DENY user1 (perms XXX)
2184 for all following allow group entries where user1 is in group
2185 new_perms |= group_perms;
2187 user1 entry perms = new_perms & ~ XXX;
2189 Convert the deny entry to an allow entry with the new perms and
2190 push to the end of the list. Note if the user was in no groups
2191 this maps to a specific allow nothing entry for this user.
2193 The common case from the NT ACL choser (userX deny all) is
2194 optimised so we don't do the group lookup - we just map to
2195 an allow nothing entry.
2197 What we're doing here is inferring the allow permissions the
2198 person setting the ACE on user1 wanted by looking at the allow
2199 permissions on the groups the user is currently in. This will
2200 be a snapshot, depending on group membership but is the best
2201 we can do and has the advantage of failing closed rather than
2203 ---------------------------------------------------------------------------
2204 Third pass - only deal with deny group entries.
2206 DENY group1 (perms XXX)
2208 for all following allow user entries where user is in group1
2209 user entry perms = user entry perms & ~ XXX;
2211 If there is a group Everyone allow entry with permissions YYY,
2212 convert the group1 entry to an allow entry and modify its
2215 new_perms = YYY & ~ XXX
2217 and push to the end of the list.
2219 If there is no group Everyone allow entry then convert the
2220 group1 entry to a allow nothing entry and push to the end of the list.
2222 Note that the common case from the NT ACL choser (groupX deny all)
2223 cannot be optimised here as we need to modify user entries who are
2224 in the group to change them to a deny all also.
2226 What we're doing here is modifying the allow permissions of
2227 user entries (which are more specific in POSIX ACLs) to mask
2228 out the explicit deny set on the group they are in. This will
2229 be a snapshot depending on current group membership but is the
2230 best we can do and has the advantage of failing closed rather
2232 ---------------------------------------------------------------------------
2233 Fourth pass - cope with cumulative permissions.
2235 for all allow user entries, if there exists an allow group entry with
2236 more permissive permissions, and the user is in that group, rewrite the
2237 allow user permissions to contain both sets of permissions.
2239 Currently the code for this is #ifdef'ed out as these semantics make
2240 no sense to me. JRA.
2241 ---------------------------------------------------------------------------
2243 Note we *MUST* do the deny user pass first as this will convert deny user
2244 entries into allow user entries which can then be processed by the deny
2247 The above algorithm took a *lot* of thinking about - hence this
2248 explaination :-). JRA.
2249 ****************************************************************************/
2251 /****************************************************************************
2252 Process a canon_ace list entries. This is very complex code. We need
2253 to go through and remove the "deny" permissions from any allow entry that matches
2254 the id of this entry. We have already refused any NT ACL that wasn't in correct
2255 order (DENY followed by ALLOW). If any allow entry ends up with zero permissions,
2256 we just remove it (to fail safe). We have already removed any duplicate ace
2257 entries. Treat an "Everyone" DENY_ACE as a special case - use it to mask all
2259 ****************************************************************************/
2261 static void process_deny_list(connection_struct
*conn
, canon_ace
**pp_ace_list
)
2263 canon_ace
*ace_list
= *pp_ace_list
;
2264 canon_ace
*curr_ace
= NULL
;
2265 canon_ace
*curr_ace_next
= NULL
;
2267 /* Pass 1 above - look for an Everyone, deny entry. */
2269 for (curr_ace
= ace_list
; curr_ace
; curr_ace
= curr_ace_next
) {
2270 canon_ace
*allow_ace_p
;
2272 curr_ace_next
= curr_ace
->next
; /* So we can't lose the link. */
2274 if (curr_ace
->attr
!= DENY_ACE
)
2277 if (curr_ace
->perms
== (mode_t
)0) {
2279 /* Deny nothing entry - delete. */
2281 DLIST_REMOVE(ace_list
, curr_ace
);
2285 if (!dom_sid_equal(&curr_ace
->trustee
, &global_sid_World
))
2288 /* JRATEST - assert. */
2289 SMB_ASSERT(curr_ace
->owner_type
== WORLD_ACE
);
2291 if (curr_ace
->perms
== ALL_ACE_PERMS
) {
2294 * Optimisation. This is a DENY_ALL to Everyone. Truncate the
2295 * list at this point including this entry.
2298 canon_ace
*prev_entry
= DLIST_PREV(curr_ace
);
2300 free_canon_ace_list( curr_ace
);
2302 DLIST_REMOVE(ace_list
, prev_entry
);
2304 /* We deleted the entire list. */
2310 for (allow_ace_p
= curr_ace
->next
; allow_ace_p
; allow_ace_p
= allow_ace_p
->next
) {
2313 * Only mask off allow entries.
2316 if (allow_ace_p
->attr
!= ALLOW_ACE
)
2319 allow_ace_p
->perms
&= ~curr_ace
->perms
;
2323 * Now it's been applied, remove it.
2326 DLIST_REMOVE(ace_list
, curr_ace
);
2329 /* Pass 2 above - deal with deny user entries. */
2331 for (curr_ace
= ace_list
; curr_ace
; curr_ace
= curr_ace_next
) {
2332 mode_t new_perms
= (mode_t
)0;
2333 canon_ace
*allow_ace_p
;
2335 curr_ace_next
= curr_ace
->next
; /* So we can't lose the link. */
2337 if (curr_ace
->attr
!= DENY_ACE
)
2340 if (curr_ace
->owner_type
!= UID_ACE
)
2343 if (curr_ace
->perms
== ALL_ACE_PERMS
) {
2346 * Optimisation - this is a deny everything to this user.
2347 * Convert to an allow nothing and push to the end of the list.
2350 curr_ace
->attr
= ALLOW_ACE
;
2351 curr_ace
->perms
= (mode_t
)0;
2352 DLIST_DEMOTE(ace_list
, curr_ace
);
2356 for (allow_ace_p
= curr_ace
->next
; allow_ace_p
; allow_ace_p
= allow_ace_p
->next
) {
2358 if (allow_ace_p
->attr
!= ALLOW_ACE
)
2361 /* We process GID_ACE and WORLD_ACE entries only. */
2363 if (allow_ace_p
->owner_type
== UID_ACE
)
2366 if (uid_entry_in_group(conn
, curr_ace
, allow_ace_p
))
2367 new_perms
|= allow_ace_p
->perms
;
2371 * Convert to a allow entry, modify the perms and push to the end
2375 curr_ace
->attr
= ALLOW_ACE
;
2376 curr_ace
->perms
= (new_perms
& ~curr_ace
->perms
);
2377 DLIST_DEMOTE(ace_list
, curr_ace
);
2380 /* Pass 3 above - deal with deny group entries. */
2382 for (curr_ace
= ace_list
; curr_ace
; curr_ace
= curr_ace_next
) {
2383 canon_ace
*allow_ace_p
;
2384 canon_ace
*allow_everyone_p
= NULL
;
2386 curr_ace_next
= curr_ace
->next
; /* So we can't lose the link. */
2388 if (curr_ace
->attr
!= DENY_ACE
)
2391 if (curr_ace
->owner_type
!= GID_ACE
)
2394 for (allow_ace_p
= curr_ace
->next
; allow_ace_p
; allow_ace_p
= allow_ace_p
->next
) {
2396 if (allow_ace_p
->attr
!= ALLOW_ACE
)
2399 /* Store a pointer to the Everyone allow, if it exists. */
2400 if (allow_ace_p
->owner_type
== WORLD_ACE
)
2401 allow_everyone_p
= allow_ace_p
;
2403 /* We process UID_ACE entries only. */
2405 if (allow_ace_p
->owner_type
!= UID_ACE
)
2408 /* Mask off the deny group perms. */
2410 if (uid_entry_in_group(conn
, allow_ace_p
, curr_ace
))
2411 allow_ace_p
->perms
&= ~curr_ace
->perms
;
2415 * Convert the deny to an allow with the correct perms and
2416 * push to the end of the list.
2419 curr_ace
->attr
= ALLOW_ACE
;
2420 if (allow_everyone_p
)
2421 curr_ace
->perms
= allow_everyone_p
->perms
& ~curr_ace
->perms
;
2423 curr_ace
->perms
= (mode_t
)0;
2424 DLIST_DEMOTE(ace_list
, curr_ace
);
2427 /* Doing this fourth pass allows Windows semantics to be layered
2428 * on top of POSIX semantics. I'm not sure if this is desirable.
2429 * For example, in W2K ACLs there is no way to say, "Group X no
2430 * access, user Y full access" if user Y is a member of group X.
2431 * This seems completely broken semantics to me.... JRA.
2435 /* Pass 4 above - deal with allow entries. */
2437 for (curr_ace
= ace_list
; curr_ace
; curr_ace
= curr_ace_next
) {
2438 canon_ace
*allow_ace_p
;
2440 curr_ace_next
= curr_ace
->next
; /* So we can't lose the link. */
2442 if (curr_ace
->attr
!= ALLOW_ACE
)
2445 if (curr_ace
->owner_type
!= UID_ACE
)
2448 for (allow_ace_p
= ace_list
; allow_ace_p
; allow_ace_p
= allow_ace_p
->next
) {
2450 if (allow_ace_p
->attr
!= ALLOW_ACE
)
2453 /* We process GID_ACE entries only. */
2455 if (allow_ace_p
->owner_type
!= GID_ACE
)
2458 /* OR in the group perms. */
2460 if (uid_entry_in_group(conn
, curr_ace
, allow_ace_p
))
2461 curr_ace
->perms
|= allow_ace_p
->perms
;
2466 *pp_ace_list
= ace_list
;
2469 /****************************************************************************
2470 Unpack a struct security_descriptor into two canonical ace lists. We don't depend on this
2472 ****************************************************************************/
2474 static bool unpack_canon_ace(files_struct
*fsp
,
2475 const SMB_STRUCT_STAT
*pst
,
2476 struct dom_sid
*pfile_owner_sid
,
2477 struct dom_sid
*pfile_grp_sid
,
2478 canon_ace
**ppfile_ace
,
2479 canon_ace
**ppdir_ace
,
2480 uint32_t security_info_sent
,
2481 const struct security_descriptor
*psd
)
2483 canon_ace
*file_ace
= NULL
;
2484 canon_ace
*dir_ace
= NULL
;
2490 if(security_info_sent
== 0) {
2491 DEBUG(0,("unpack_canon_ace: no security info sent !\n"));
2496 * If no DACL then this is a chown only security descriptor.
2499 if(!(security_info_sent
& SECINFO_DACL
) || !psd
->dacl
)
2503 * Now go through the DACL and create the canon_ace lists.
2506 if (!create_canon_ace_lists(fsp
, pst
, pfile_owner_sid
, pfile_grp_sid
,
2507 &file_ace
, &dir_ace
, psd
->dacl
)) {
2511 if ((file_ace
== NULL
) && (dir_ace
== NULL
)) {
2512 /* W2K traverse DACL set - ignore. */
2517 * Go through the canon_ace list and merge entries
2518 * belonging to identical users of identical allow or deny type.
2519 * We can do this as all deny entries come first, followed by
2520 * all allow entries (we have mandated this before accepting this acl).
2523 print_canon_ace_list( "file ace - before merge", file_ace
);
2524 merge_aces( &file_ace
, false);
2526 print_canon_ace_list( "dir ace - before merge", dir_ace
);
2527 merge_aces( &dir_ace
, true);
2530 * NT ACLs are order dependent. Go through the acl lists and
2531 * process DENY entries by masking the allow entries.
2534 print_canon_ace_list( "file ace - before deny", file_ace
);
2535 process_deny_list(fsp
->conn
, &file_ace
);
2537 print_canon_ace_list( "dir ace - before deny", dir_ace
);
2538 process_deny_list(fsp
->conn
, &dir_ace
);
2541 * A well formed POSIX file or default ACL has at least 3 entries, a
2542 * SMB_ACL_USER_OBJ, SMB_ACL_GROUP_OBJ, SMB_ACL_OTHER_OBJ
2543 * and optionally a mask entry. Ensure this is the case.
2546 print_canon_ace_list( "file ace - before valid", file_ace
);
2548 ok
= ensure_canon_entry_valid_on_set(
2553 fsp
->fsp_flags
.is_directory
,
2558 free_canon_ace_list(file_ace
);
2559 free_canon_ace_list(dir_ace
);
2563 print_canon_ace_list( "dir ace - before valid", dir_ace
);
2565 if (dir_ace
!= NULL
) {
2566 ok
= ensure_canon_entry_valid_on_set(
2571 fsp
->fsp_flags
.is_directory
,
2576 free_canon_ace_list(file_ace
);
2577 free_canon_ace_list(dir_ace
);
2582 print_canon_ace_list( "file ace - return", file_ace
);
2583 print_canon_ace_list( "dir ace - return", dir_ace
);
2585 *ppfile_ace
= file_ace
;
2586 *ppdir_ace
= dir_ace
;
2591 /******************************************************************************
2592 When returning permissions, try and fit NT display
2593 semantics if possible. Note the the canon_entries here must have been malloced.
2594 The list format should be - first entry = owner, followed by group and other user
2595 entries, last entry = other.
2597 Note that this doesn't exactly match the NT semantics for an ACL. As POSIX entries
2598 are not ordered, and match on the most specific entry rather than walking a list,
2599 then a simple POSIX permission of rw-r--r-- should really map to 5 entries,
2601 Entry 0: owner : deny all except read and write.
2602 Entry 1: owner : allow read and write.
2603 Entry 2: group : deny all except read.
2604 Entry 3: group : allow read.
2605 Entry 4: Everyone : allow read.
2607 But NT cannot display this in their ACL editor !
2608 ********************************************************************************/
2610 static void arrange_posix_perms(const char *filename
, canon_ace
**pp_list_head
)
2612 canon_ace
*l_head
= *pp_list_head
;
2613 canon_ace
*owner_ace
= NULL
;
2614 canon_ace
*other_ace
= NULL
;
2615 canon_ace
*ace
= NULL
;
2617 for (ace
= l_head
; ace
; ace
= ace
->next
) {
2618 if (ace
->type
== SMB_ACL_USER_OBJ
)
2620 else if (ace
->type
== SMB_ACL_OTHER
) {
2621 /* Last ace - this is "other" */
2626 if (!owner_ace
|| !other_ace
) {
2627 DEBUG(0,("arrange_posix_perms: Invalid POSIX permissions for file %s, missing owner or other.\n",
2633 * The POSIX algorithm applies to owner first, and other last,
2634 * so ensure they are arranged in this order.
2638 DLIST_PROMOTE(l_head
, owner_ace
);
2642 DLIST_DEMOTE(l_head
, other_ace
);
2645 /* We have probably changed the head of the list. */
2647 *pp_list_head
= l_head
;
2650 /****************************************************************************
2651 Create a linked list of canonical ACE entries.
2652 ****************************************************************************/
2654 static canon_ace
*canonicalise_acl(struct connection_struct
*conn
,
2655 const char *fname
, SMB_ACL_T posix_acl
,
2656 const SMB_STRUCT_STAT
*psbuf
,
2657 const struct dom_sid
*powner
, const struct dom_sid
*pgroup
, struct pai_val
*pal
, SMB_ACL_TYPE_T the_acl_type
)
2659 mode_t acl_mask
= (S_IRUSR
|S_IWUSR
|S_IXUSR
);
2660 canon_ace
*l_head
= NULL
;
2661 canon_ace
*ace
= NULL
;
2662 canon_ace
*next_ace
= NULL
;
2663 int entry_id
= SMB_ACL_FIRST_ENTRY
;
2664 bool is_default_acl
= (the_acl_type
== SMB_ACL_TYPE_DEFAULT
);
2665 SMB_ACL_ENTRY_T entry
;
2668 while ( posix_acl
&& (sys_acl_get_entry(posix_acl
, entry_id
, &entry
) == 1)) {
2669 SMB_ACL_TAG_T tagtype
;
2670 SMB_ACL_PERMSET_T permset
;
2672 struct unixid unix_ug
;
2673 enum ace_owner owner_type
;
2675 entry_id
= SMB_ACL_NEXT_ENTRY
;
2677 if (sys_acl_get_tag_type(entry
, &tagtype
) == -1)
2680 if (sys_acl_get_permset(entry
, &permset
) == -1)
2683 /* Decide which SID to use based on the ACL type. */
2685 case SMB_ACL_USER_OBJ
:
2686 /* Get the SID from the owner. */
2687 sid_copy(&sid
, powner
);
2688 unix_ug
.type
= ID_TYPE_UID
;
2689 unix_ug
.id
= psbuf
->st_ex_uid
;
2690 owner_type
= UID_ACE
;
2694 uid_t
*puid
= (uid_t
*)sys_acl_get_qualifier(entry
);
2696 DEBUG(0,("canonicalise_acl: Failed to get uid.\n"));
2699 uid_to_sid( &sid
, *puid
);
2700 unix_ug
.type
= ID_TYPE_UID
;
2702 owner_type
= UID_ACE
;
2705 case SMB_ACL_GROUP_OBJ
:
2706 /* Get the SID from the owning group. */
2707 sid_copy(&sid
, pgroup
);
2708 unix_ug
.type
= ID_TYPE_GID
;
2709 unix_ug
.id
= psbuf
->st_ex_gid
;
2710 owner_type
= GID_ACE
;
2714 gid_t
*pgid
= (gid_t
*)sys_acl_get_qualifier(entry
);
2716 DEBUG(0,("canonicalise_acl: Failed to get gid.\n"));
2719 gid_to_sid( &sid
, *pgid
);
2720 unix_ug
.type
= ID_TYPE_GID
;
2722 owner_type
= GID_ACE
;
2726 acl_mask
= convert_permset_to_mode_t(permset
);
2727 continue; /* Don't count the mask as an entry. */
2729 /* Use the Everyone SID */
2730 sid
= global_sid_World
;
2731 unix_ug
.type
= ID_TYPE_NOT_SPECIFIED
;
2733 owner_type
= WORLD_ACE
;
2736 DEBUG(0,("canonicalise_acl: Unknown tagtype %u\n", (unsigned int)tagtype
));
2741 * Add this entry to the list.
2744 if ((ace
= talloc(talloc_tos(), canon_ace
)) == NULL
)
2747 *ace
= (canon_ace
) {
2749 .perms
= convert_permset_to_mode_t(permset
),
2753 .owner_type
= owner_type
2755 ace
->ace_flags
= get_pai_flags(pal
, ace
, is_default_acl
);
2757 DLIST_ADD(l_head
, ace
);
2761 * This next call will ensure we have at least a user/group/world set.
2764 if (!ensure_canon_entry_valid_on_get(conn
, &l_head
,
2770 * Now go through the list, masking the permissions with the
2771 * acl_mask. Ensure all DENY Entries are at the start of the list.
2774 DEBUG(10,("canonicalise_acl: %s ace entries before arrange :\n", is_default_acl
? "Default" : "Access"));
2776 for ( ace_count
= 0, ace
= l_head
; ace
; ace
= next_ace
, ace_count
++) {
2777 next_ace
= ace
->next
;
2779 /* Masks are only applied to entries other than USER_OBJ and OTHER. */
2780 if (ace
->type
!= SMB_ACL_OTHER
&& ace
->type
!= SMB_ACL_USER_OBJ
)
2781 ace
->perms
&= acl_mask
;
2783 if (ace
->perms
== 0) {
2784 DLIST_PROMOTE(l_head
, ace
);
2787 if( DEBUGLVL( 10 ) ) {
2788 print_canon_ace(ace
, ace_count
);
2792 arrange_posix_perms(fname
,&l_head
);
2794 print_canon_ace_list( "canonicalise_acl: ace entries after arrange", l_head
);
2800 free_canon_ace_list(l_head
);
2804 /****************************************************************************
2805 Check if the current user group list contains a given group.
2806 ****************************************************************************/
2808 bool current_user_in_group(connection_struct
*conn
, gid_t gid
)
2811 const struct security_unix_token
*utok
= get_current_utok(conn
);
2813 for (i
= 0; i
< utok
->ngroups
; i
++) {
2814 if (utok
->groups
[i
] == gid
) {
2822 /****************************************************************************
2823 Should we override a deny ? Check 'acl group control' and 'dos filemode'.
2824 ****************************************************************************/
2826 static bool acl_group_override(connection_struct
*conn
,
2827 const struct smb_filename
*smb_fname
)
2829 if ((errno
!= EPERM
) && (errno
!= EACCES
)) {
2833 /* file primary group == user primary or supplementary group */
2834 if (lp_acl_group_control(SNUM(conn
)) &&
2835 current_user_in_group(conn
, smb_fname
->st
.st_ex_gid
)) {
2839 /* user has writeable permission */
2840 if (lp_dos_filemode(SNUM(conn
)) &&
2841 can_write_to_file(conn
,
2851 /****************************************************************************
2852 Attempt to apply an ACL to a file or directory.
2853 ****************************************************************************/
2855 static bool set_canon_ace_list(files_struct
*fsp
,
2858 const SMB_STRUCT_STAT
*psbuf
,
2859 bool *pacl_set_support
)
2861 connection_struct
*conn
= fsp
->conn
;
2863 SMB_ACL_T the_acl
= sys_acl_init(talloc_tos());
2866 SMB_ACL_ENTRY_T mask_entry
;
2867 bool got_mask_entry
= False
;
2868 SMB_ACL_PERMSET_T mask_permset
;
2869 SMB_ACL_TYPE_T the_acl_type
= (default_ace
? SMB_ACL_TYPE_DEFAULT
: SMB_ACL_TYPE_ACCESS
);
2870 bool needs_mask
= False
;
2871 mode_t mask_perms
= 0;
2874 /* Use the psbuf that was passed in. */
2875 if (psbuf
!= &fsp
->fsp_name
->st
) {
2876 fsp
->fsp_name
->st
= *psbuf
;
2879 #if defined(POSIX_ACL_NEEDS_MASK)
2880 /* HP-UX always wants to have a mask (called "class" there). */
2884 if (the_acl
== NULL
) {
2885 DEBUG(0, ("sys_acl_init failed to allocate an ACL\n"));
2889 if( DEBUGLVL( 10 )) {
2890 dbgtext("set_canon_ace_list: setting ACL:\n");
2891 for (i
= 0, p_ace
= the_ace
; p_ace
; p_ace
= p_ace
->next
, i
++ ) {
2892 print_canon_ace( p_ace
, i
);
2896 for (i
= 0, p_ace
= the_ace
; p_ace
; p_ace
= p_ace
->next
, i
++ ) {
2897 SMB_ACL_ENTRY_T the_entry
;
2898 SMB_ACL_PERMSET_T the_permset
;
2901 * ACLs only "need" an ACL_MASK entry if there are any named user or
2902 * named group entries. But if there is an ACL_MASK entry, it applies
2903 * to ACL_USER, ACL_GROUP, and ACL_GROUP_OBJ entries. Set the mask
2904 * so that it doesn't deny (i.e., mask off) any permissions.
2907 if (p_ace
->type
== SMB_ACL_USER
|| p_ace
->type
== SMB_ACL_GROUP
) {
2909 mask_perms
|= p_ace
->perms
;
2910 } else if (p_ace
->type
== SMB_ACL_GROUP_OBJ
) {
2911 mask_perms
|= p_ace
->perms
;
2915 * Get the entry for this ACE.
2918 if (sys_acl_create_entry(&the_acl
, &the_entry
) == -1) {
2919 DEBUG(0,("set_canon_ace_list: Failed to create entry %d. (%s)\n",
2920 i
, strerror(errno
) ));
2924 if (p_ace
->type
== SMB_ACL_MASK
) {
2925 mask_entry
= the_entry
;
2926 got_mask_entry
= True
;
2930 * Ok - we now know the ACL calls should be working, don't
2931 * allow fallback to chmod.
2934 *pacl_set_support
= True
;
2937 * Initialise the entry from the canon_ace.
2941 * First tell the entry what type of ACE this is.
2944 if (sys_acl_set_tag_type(the_entry
, p_ace
->type
) == -1) {
2945 DEBUG(0,("set_canon_ace_list: Failed to set tag type on entry %d. (%s)\n",
2946 i
, strerror(errno
) ));
2951 * Only set the qualifier (user or group id) if the entry is a user
2955 if ((p_ace
->type
== SMB_ACL_USER
) || (p_ace
->type
== SMB_ACL_GROUP
)) {
2956 if (sys_acl_set_qualifier(the_entry
,(void *)&p_ace
->unix_ug
.id
) == -1) {
2957 DEBUG(0,("set_canon_ace_list: Failed to set qualifier on entry %d. (%s)\n",
2958 i
, strerror(errno
) ));
2964 * Convert the mode_t perms in the canon_ace to a POSIX permset.
2967 if (sys_acl_get_permset(the_entry
, &the_permset
) == -1) {
2968 DEBUG(0,("set_canon_ace_list: Failed to get permset on entry %d. (%s)\n",
2969 i
, strerror(errno
) ));
2973 if (map_acl_perms_to_permset(p_ace
->perms
, &the_permset
) == -1) {
2974 DEBUG(0,("set_canon_ace_list: Failed to create permset for mode (%u) on entry %d. (%s)\n",
2975 (unsigned int)p_ace
->perms
, i
, strerror(errno
) ));
2980 * ..and apply them to the entry.
2983 if (sys_acl_set_permset(the_entry
, the_permset
) == -1) {
2984 DEBUG(0,("set_canon_ace_list: Failed to add permset on entry %d. (%s)\n",
2985 i
, strerror(errno
) ));
2990 print_canon_ace( p_ace
, i
);
2994 if (needs_mask
&& !got_mask_entry
) {
2995 if (sys_acl_create_entry(&the_acl
, &mask_entry
) == -1) {
2996 DEBUG(0,("set_canon_ace_list: Failed to create mask entry. (%s)\n", strerror(errno
) ));
3000 if (sys_acl_set_tag_type(mask_entry
, SMB_ACL_MASK
) == -1) {
3001 DEBUG(0,("set_canon_ace_list: Failed to set tag type on mask entry. (%s)\n",strerror(errno
) ));
3005 if (sys_acl_get_permset(mask_entry
, &mask_permset
) == -1) {
3006 DEBUG(0,("set_canon_ace_list: Failed to get mask permset. (%s)\n", strerror(errno
) ));
3010 if (map_acl_perms_to_permset(S_IRUSR
|S_IWUSR
|S_IXUSR
, &mask_permset
) == -1) {
3011 DEBUG(0,("set_canon_ace_list: Failed to create mask permset. (%s)\n", strerror(errno
) ));
3015 if (sys_acl_set_permset(mask_entry
, mask_permset
) == -1) {
3016 DEBUG(0,("set_canon_ace_list: Failed to add mask permset. (%s)\n", strerror(errno
) ));
3022 * Finally apply it to the file or directory.
3024 sret
= SMB_VFS_SYS_ACL_SET_FD(fsp
, the_acl_type
, the_acl
);
3027 * Some systems allow all the above calls and only fail with no ACL support
3028 * when attempting to apply the acl. HPUX with HFS is an example of this. JRA.
3030 if (no_acl_syscall_error(errno
)) {
3031 *pacl_set_support
= false;
3034 if (acl_group_override(conn
, fsp
->fsp_name
)) {
3035 DBG_DEBUG("acl group control on and current user in "
3036 "file [%s] primary group.\n",
3040 sret
= SMB_VFS_SYS_ACL_SET_FD(fsp
,
3050 DBG_WARNING("sys_acl_set_file on file [%s]: (%s)\n",
3051 fsp_str_dbg(fsp
), strerror(errno
));
3060 if (the_acl
!= NULL
) {
3061 TALLOC_FREE(the_acl
);
3067 /****************************************************************************
3069 ****************************************************************************/
3071 SMB_ACL_T
free_empty_sys_acl(connection_struct
*conn
, SMB_ACL_T the_acl
)
3073 SMB_ACL_ENTRY_T entry
;
3077 if (sys_acl_get_entry(the_acl
, SMB_ACL_FIRST_ENTRY
, &entry
) != 1) {
3078 TALLOC_FREE(the_acl
);
3084 /****************************************************************************
3085 Convert a canon_ace to a generic 3 element permission - if possible.
3086 ****************************************************************************/
3088 #define MAP_PERM(p,mask,result) (((p) & (mask)) ? (result) : 0 )
3090 static bool convert_canon_ace_to_posix_perms( files_struct
*fsp
, canon_ace
*file_ace_list
, mode_t
*posix_perms
)
3092 size_t ace_count
= count_canon_ace_list(file_ace_list
);
3094 canon_ace
*owner_ace
= NULL
;
3095 canon_ace
*group_ace
= NULL
;
3096 canon_ace
*other_ace
= NULL
;
3098 if (ace_count
> 5) {
3099 DEBUG(3,("convert_canon_ace_to_posix_perms: Too many ACE "
3100 "entries for file %s to convert to posix perms.\n",
3105 for (ace_p
= file_ace_list
; ace_p
; ace_p
= ace_p
->next
) {
3106 if (ace_p
->owner_type
== UID_ACE
)
3108 else if (ace_p
->owner_type
== GID_ACE
)
3110 else if (ace_p
->owner_type
== WORLD_ACE
)
3114 if (!owner_ace
|| !group_ace
|| !other_ace
) {
3115 DEBUG(3,("convert_canon_ace_to_posix_perms: Can't get "
3116 "standard entries for file %s.\n", fsp_str_dbg(fsp
)));
3121 * Ensure all ACE entries are owner, group or other.
3122 * We can't set if there are any other SIDs.
3124 for (ace_p
= file_ace_list
; ace_p
; ace_p
= ace_p
->next
) {
3125 if (ace_p
== owner_ace
|| ace_p
== group_ace
||
3126 ace_p
== other_ace
) {
3129 if (ace_p
->owner_type
== UID_ACE
) {
3130 if (ace_p
->unix_ug
.id
!= owner_ace
->unix_ug
.id
) {
3131 DEBUG(3,("Invalid uid %u in ACE for file %s.\n",
3132 (unsigned int)ace_p
->unix_ug
.id
,
3136 } else if (ace_p
->owner_type
== GID_ACE
) {
3137 if (ace_p
->unix_ug
.id
!= group_ace
->unix_ug
.id
) {
3138 DEBUG(3,("Invalid gid %u in ACE for file %s.\n",
3139 (unsigned int)ace_p
->unix_ug
.id
,
3145 * There should be no duplicate WORLD_ACE entries.
3148 DEBUG(3,("Invalid type %u, uid %u in "
3149 "ACE for file %s.\n",
3150 (unsigned int)ace_p
->owner_type
,
3151 (unsigned int)ace_p
->unix_ug
.id
,
3157 *posix_perms
= (mode_t
)0;
3159 *posix_perms
|= owner_ace
->perms
;
3160 *posix_perms
|= MAP_PERM(group_ace
->perms
, S_IRUSR
, S_IRGRP
);
3161 *posix_perms
|= MAP_PERM(group_ace
->perms
, S_IWUSR
, S_IWGRP
);
3162 *posix_perms
|= MAP_PERM(group_ace
->perms
, S_IXUSR
, S_IXGRP
);
3163 *posix_perms
|= MAP_PERM(other_ace
->perms
, S_IRUSR
, S_IROTH
);
3164 *posix_perms
|= MAP_PERM(other_ace
->perms
, S_IWUSR
, S_IWOTH
);
3165 *posix_perms
|= MAP_PERM(other_ace
->perms
, S_IXUSR
, S_IXOTH
);
3167 /* The owner must have at least read access. */
3169 *posix_perms
|= S_IRUSR
;
3170 if (fsp
->fsp_flags
.is_directory
)
3171 *posix_perms
|= (S_IWUSR
|S_IXUSR
);
3173 DEBUG(10,("convert_canon_ace_to_posix_perms: converted u=%o,g=%o,w=%o "
3174 "to perm=0%o for file %s.\n", (int)owner_ace
->perms
,
3175 (int)group_ace
->perms
, (int)other_ace
->perms
,
3176 (int)*posix_perms
, fsp_str_dbg(fsp
)));
3181 /****************************************************************************
3182 Incoming NT ACLs on a directory can be split into a default POSIX acl (CI|OI|IO) and
3183 a normal POSIX acl. Win2k needs these split acls re-merging into one ACL
3184 with CI|OI set so it is inherited and also applies to the directory.
3185 Based on code from "Jim McDonough" <jmcd@us.ibm.com>.
3186 ****************************************************************************/
3188 static size_t merge_default_aces( struct security_ace
*nt_ace_list
, size_t num_aces
)
3192 for (i
= 0; i
< num_aces
; i
++) {
3193 for (j
= i
+1; j
< num_aces
; j
++) {
3194 uint32_t i_flags_ni
= (nt_ace_list
[i
].flags
& ~SEC_ACE_FLAG_INHERITED_ACE
);
3195 uint32_t j_flags_ni
= (nt_ace_list
[j
].flags
& ~SEC_ACE_FLAG_INHERITED_ACE
);
3196 bool i_inh
= (nt_ace_list
[i
].flags
& SEC_ACE_FLAG_INHERITED_ACE
) ? True
: False
;
3197 bool j_inh
= (nt_ace_list
[j
].flags
& SEC_ACE_FLAG_INHERITED_ACE
) ? True
: False
;
3199 /* We know the lower number ACE's are file entries. */
3200 if ((nt_ace_list
[i
].type
== nt_ace_list
[j
].type
) &&
3201 (nt_ace_list
[i
].size
== nt_ace_list
[j
].size
) &&
3202 (nt_ace_list
[i
].access_mask
== nt_ace_list
[j
].access_mask
) &&
3203 dom_sid_equal(&nt_ace_list
[i
].trustee
, &nt_ace_list
[j
].trustee
) &&
3205 (i_flags_ni
== 0) &&
3206 (j_flags_ni
== (SEC_ACE_FLAG_OBJECT_INHERIT
|
3207 SEC_ACE_FLAG_CONTAINER_INHERIT
|
3208 SEC_ACE_FLAG_INHERIT_ONLY
))) {
3210 * W2K wants to have access allowed zero access ACE's
3211 * at the end of the list. If the mask is zero, merge
3212 * the non-inherited ACE onto the inherited ACE.
3215 if (nt_ace_list
[i
].access_mask
== 0) {
3216 nt_ace_list
[j
].flags
= SEC_ACE_FLAG_OBJECT_INHERIT
|SEC_ACE_FLAG_CONTAINER_INHERIT
|
3217 (i_inh
? SEC_ACE_FLAG_INHERITED_ACE
: 0);
3218 ARRAY_DEL_ELEMENT(nt_ace_list
, i
, num_aces
);
3220 DEBUG(10,("merge_default_aces: Merging zero access ACE %u onto ACE %u.\n",
3221 (unsigned int)i
, (unsigned int)j
));
3224 * These are identical except for the flags.
3225 * Merge the inherited ACE onto the non-inherited ACE.
3228 nt_ace_list
[i
].flags
= SEC_ACE_FLAG_OBJECT_INHERIT
|SEC_ACE_FLAG_CONTAINER_INHERIT
|
3229 (i_inh
? SEC_ACE_FLAG_INHERITED_ACE
: 0);
3230 ARRAY_DEL_ELEMENT(nt_ace_list
, j
, num_aces
);
3232 DEBUG(10,("merge_default_aces: Merging ACE %u onto ACE %u.\n",
3233 (unsigned int)j
, (unsigned int)i
));
3245 /****************************************************************************
3246 Reply to query a security descriptor from an fsp. If it succeeds it allocates
3247 the space for the return elements and returns the size needed to return the
3248 security descriptor. This should be the only external function needed for
3249 the UNIX style get ACL.
3250 ****************************************************************************/
3252 static NTSTATUS
posix_get_nt_acl_common(struct connection_struct
*conn
,
3254 const SMB_STRUCT_STAT
*sbuf
,
3255 struct pai_val
*pal
,
3256 SMB_ACL_T posix_acl
,
3258 uint32_t security_info
,
3259 TALLOC_CTX
*mem_ctx
,
3260 struct security_descriptor
**ppdesc
)
3262 struct dom_sid owner_sid
;
3263 struct dom_sid group_sid
;
3265 struct security_acl
*psa
= NULL
;
3266 size_t num_acls
= 0;
3267 size_t num_def_acls
= 0;
3268 size_t num_aces
= 0;
3269 canon_ace
*file_ace
= NULL
;
3270 canon_ace
*dir_ace
= NULL
;
3271 struct security_ace
*nt_ace_list
= NULL
;
3272 struct security_descriptor
*psd
= NULL
;
3275 * Get the owner, group and world SIDs.
3278 create_file_sids(sbuf
, &owner_sid
, &group_sid
);
3280 if (security_info
& SECINFO_DACL
) {
3283 * In the optimum case Creator Owner and Creator Group would be used for
3284 * the ACL_USER_OBJ and ACL_GROUP_OBJ entries, respectively, but this
3285 * would lead to usability problems under Windows: The Creator entries
3286 * are only available in browse lists of directories and not for files;
3287 * additionally the identity of the owning group couldn't be determined.
3288 * We therefore use those identities only for Default ACLs.
3291 /* Create the canon_ace lists. */
3292 file_ace
= canonicalise_acl(conn
, name
, posix_acl
, sbuf
,
3293 &owner_sid
, &group_sid
, pal
,
3294 SMB_ACL_TYPE_ACCESS
);
3296 /* We must have *some* ACLS. */
3298 if (count_canon_ace_list(file_ace
) == 0) {
3299 DEBUG(0,("get_nt_acl : No ACLs on file (%s) !\n", name
));
3303 if (S_ISDIR(sbuf
->st_ex_mode
) && def_acl
) {
3304 dir_ace
= canonicalise_acl(conn
, name
, def_acl
,
3306 &global_sid_Creator_Owner
,
3307 &global_sid_Creator_Group
,
3308 pal
, SMB_ACL_TYPE_DEFAULT
);
3312 * Create the NT ACE list from the canonical ace lists.
3317 enum security_ace_type nt_acl_type
;
3319 num_acls
= count_canon_ace_list(file_ace
);
3320 num_def_acls
= count_canon_ace_list(dir_ace
);
3322 nt_ace_list
= talloc_zero_array(
3323 talloc_tos(), struct security_ace
,
3324 num_acls
+ num_def_acls
);
3326 if (nt_ace_list
== NULL
) {
3327 DEBUG(0,("get_nt_acl: Unable to malloc space for nt_ace_list.\n"));
3332 * Create the NT ACE list from the canonical ace lists.
3335 for (ace
= file_ace
; ace
!= NULL
; ace
= ace
->next
) {
3336 uint32_t acc
= map_canon_ace_perms(SNUM(conn
),
3339 S_ISDIR(sbuf
->st_ex_mode
));
3340 init_sec_ace(&nt_ace_list
[num_aces
++],
3347 for (ace
= dir_ace
; ace
!= NULL
; ace
= ace
->next
) {
3348 uint32_t acc
= map_canon_ace_perms(SNUM(conn
),
3351 S_ISDIR(sbuf
->st_ex_mode
));
3352 init_sec_ace(&nt_ace_list
[num_aces
++],
3357 SEC_ACE_FLAG_OBJECT_INHERIT
|
3358 SEC_ACE_FLAG_CONTAINER_INHERIT
|
3359 SEC_ACE_FLAG_INHERIT_ONLY
);
3363 * Merge POSIX default ACLs and normal ACLs into one NT ACE.
3364 * Win2K needs this to get the inheritance correct when replacing ACLs
3365 * on a directory tree. Based on work by Jim @ IBM.
3368 num_aces
= merge_default_aces(nt_ace_list
, num_aces
);
3372 if((psa
= make_sec_acl( talloc_tos(), NT4_ACL_REVISION
, num_aces
, nt_ace_list
)) == NULL
) {
3373 DEBUG(0,("get_nt_acl: Unable to malloc space for acl.\n"));
3377 } /* security_info & SECINFO_DACL */
3379 psd
= make_standard_sec_desc(mem_ctx
,
3380 (security_info
& SECINFO_OWNER
) ? &owner_sid
: NULL
,
3381 (security_info
& SECINFO_GROUP
) ? &group_sid
: NULL
,
3386 DEBUG(0,("get_nt_acl: Unable to malloc space for security descriptor.\n"));
3392 * Windows 2000: The DACL_PROTECTED flag in the security
3393 * descriptor marks the ACL as non-inheriting, i.e., no
3394 * ACEs from higher level directories propagate to this
3395 * ACL. In the POSIX ACL model permissions are only
3396 * inherited at file create time, so ACLs never contain
3397 * any ACEs that are inherited dynamically. The DACL_PROTECTED
3398 * flag doesn't seem to bother Windows NT.
3399 * Always set this if map acl inherit is turned off.
3401 if (pal
== NULL
|| !lp_map_acl_inherit(SNUM(conn
))) {
3402 psd
->type
|= SEC_DESC_DACL_PROTECTED
;
3404 psd
->type
|= pal
->sd_type
;
3408 dacl_sort_into_canonical_order(psd
->dacl
->aces
, (unsigned int)psd
->dacl
->num_aces
);
3416 TALLOC_FREE(posix_acl
);
3419 TALLOC_FREE(def_acl
);
3421 free_canon_ace_list(file_ace
);
3422 free_canon_ace_list(dir_ace
);
3423 free_inherited_info(pal
);
3424 TALLOC_FREE(nt_ace_list
);
3426 return NT_STATUS_OK
;
3429 NTSTATUS
posix_fget_nt_acl(struct files_struct
*fsp
, uint32_t security_info
,
3430 TALLOC_CTX
*mem_ctx
,
3431 struct security_descriptor
**ppdesc
)
3433 SMB_STRUCT_STAT sbuf
;
3434 SMB_ACL_T posix_acl
= NULL
;
3435 struct pai_val
*pal
;
3436 TALLOC_CTX
*frame
= talloc_stackframe();
3441 DEBUG(10,("posix_fget_nt_acl: called for file %s\n",
3444 /* Get the stat struct for the owner info. */
3445 if(SMB_VFS_FSTAT(fsp
, &sbuf
) != 0) {
3447 return map_nt_error_from_unix(errno
);
3450 /* Get the ACL from the fd. */
3451 posix_acl
= SMB_VFS_SYS_ACL_GET_FD(fsp
, frame
);
3453 pal
= fload_inherited_info(fsp
);
3455 status
= posix_get_nt_acl_common(fsp
->conn
, fsp
->fsp_name
->base_name
,
3456 &sbuf
, pal
, posix_acl
, NULL
,
3457 security_info
, mem_ctx
, ppdesc
);
3462 NTSTATUS
posix_get_nt_acl(struct connection_struct
*conn
,
3463 const struct smb_filename
*smb_fname_in
,
3464 uint32_t security_info
,
3465 TALLOC_CTX
*mem_ctx
,
3466 struct security_descriptor
**ppdesc
)
3468 SMB_ACL_T posix_acl
= NULL
;
3469 SMB_ACL_T def_acl
= NULL
;
3470 struct pai_val
*pal
;
3471 struct smb_filename
*smb_fname
= NULL
;
3473 TALLOC_CTX
*frame
= talloc_stackframe();
3478 DEBUG(10,("posix_get_nt_acl: called for file %s\n",
3479 smb_fname_in
->base_name
));
3481 smb_fname
= cp_smb_filename(talloc_tos(), smb_fname_in
);
3482 if (smb_fname
== NULL
) {
3484 return NT_STATUS_NO_MEMORY
;
3487 /* Get the stat struct for the owner info. */
3489 * We can directly use SMB_VFS_STAT here, as if this was a
3490 * POSIX call on a symlink, we've already refused it.
3491 * For a Windows acl mapped call on a symlink, we want to follow
3494 ret
= SMB_VFS_STAT(conn
, smb_fname
);
3498 return map_nt_error_from_unix(errno
);
3501 /* Get the ACL from the path. */
3502 posix_acl
= SMB_VFS_SYS_ACL_GET_FILE(conn
, smb_fname
,
3503 SMB_ACL_TYPE_ACCESS
, frame
);
3505 /* If it's a directory get the default POSIX ACL. */
3506 if(S_ISDIR(smb_fname
->st
.st_ex_mode
)) {
3507 def_acl
= SMB_VFS_SYS_ACL_GET_FILE(conn
, smb_fname
,
3508 SMB_ACL_TYPE_DEFAULT
, frame
);
3509 def_acl
= free_empty_sys_acl(conn
, def_acl
);
3512 pal
= load_inherited_info(conn
, smb_fname
);
3514 status
= posix_get_nt_acl_common(conn
,
3515 smb_fname
->base_name
,
3527 /****************************************************************************
3528 Try to chown a file. We will be able to chown it under the following conditions.
3530 1) If we have root privileges, then it will just work.
3531 2) If we have SeRestorePrivilege we can change the user + group to any other user.
3532 3) If we have SeTakeOwnershipPrivilege we can change the user to the current user.
3533 4) If we have write permission to the file and dos_filemodes is set
3534 then allow chown to the currently authenticated user.
3535 ****************************************************************************/
3537 NTSTATUS
try_chown(files_struct
*fsp
, uid_t uid
, gid_t gid
)
3542 if(!CAN_WRITE(fsp
->conn
)) {
3543 return NT_STATUS_MEDIA_WRITE_PROTECTED
;
3547 ret
= SMB_VFS_FCHOWN(fsp
, uid
, gid
);
3549 return NT_STATUS_OK
;
3552 /* Case (2) / (3) */
3553 if (lp_enable_privileges()) {
3554 bool has_take_ownership_priv
= security_token_has_privilege(
3555 get_current_nttok(fsp
->conn
),
3556 SEC_PRIV_TAKE_OWNERSHIP
);
3557 bool has_restore_priv
= security_token_has_privilege(
3558 get_current_nttok(fsp
->conn
),
3561 if (has_restore_priv
) {
3563 } else if (has_take_ownership_priv
) {
3565 if (uid
== get_current_uid(fsp
->conn
)) {
3568 has_take_ownership_priv
= false;
3572 if (has_take_ownership_priv
|| has_restore_priv
) {
3573 status
= NT_STATUS_OK
;
3575 ret
= SMB_VFS_FCHOWN(fsp
, uid
, gid
);
3577 status
= map_nt_error_from_unix(errno
);
3585 if (!lp_dos_filemode(SNUM(fsp
->conn
))) {
3586 return NT_STATUS_ACCESS_DENIED
;
3589 /* only allow chown to the current user. This is more secure,
3590 and also copes with the case where the SID in a take ownership ACL is
3591 a local SID on the users workstation
3593 if (uid
!= get_current_uid(fsp
->conn
)) {
3594 return NT_STATUS_INVALID_OWNER
;
3597 status
= NT_STATUS_OK
;
3599 /* Keep the current file gid the same. */
3600 ret
= SMB_VFS_FCHOWN(fsp
, uid
, (gid_t
)-1);
3602 status
= map_nt_error_from_unix(errno
);
3609 /****************************************************************************
3610 Reply to set a security descriptor on an fsp. security_info_sent is the
3611 description of the following NT ACL.
3612 This should be the only external function needed for the UNIX style set ACL.
3613 We make a copy of psd_orig as internal functions modify the elements inside
3614 it, even though it's a const pointer.
3615 ****************************************************************************/
3617 NTSTATUS
set_nt_acl(files_struct
*fsp
, uint32_t security_info_sent
, const struct security_descriptor
*psd_orig
)
3619 connection_struct
*conn
= fsp
->conn
;
3620 uid_t user
= (uid_t
)-1;
3621 gid_t grp
= (gid_t
)-1;
3622 struct dom_sid file_owner_sid
;
3623 struct dom_sid file_grp_sid
;
3624 canon_ace
*file_ace_list
= NULL
;
3625 canon_ace
*dir_ace_list
= NULL
;
3626 bool acl_perms
= False
;
3627 mode_t orig_mode
= (mode_t
)0;
3629 bool set_acl_as_root
= false;
3630 bool acl_set_support
= false;
3632 struct security_descriptor
*psd
= NULL
;
3634 DEBUG(10,("set_nt_acl: called for file %s\n",
3637 if (!CAN_WRITE(conn
)) {
3638 DEBUG(10,("set acl rejected on read-only share\n"));
3639 return NT_STATUS_MEDIA_WRITE_PROTECTED
;
3642 if (psd_orig
== NULL
) {
3643 return NT_STATUS_INVALID_PARAMETER
;
3647 * MS NFS mode, here's the deal: the client merely wants to
3648 * modify the mode, but roundtripping get_acl/set/acl would
3649 * add additional POSIX ACEs. So in case we get a request
3650 * containing a MS NFS mode SID, we do nothing here.
3652 if (security_descriptor_with_ms_nfs(psd_orig
)) {
3653 return NT_STATUS_OK
;
3656 psd
= security_descriptor_copy(talloc_tos(), psd_orig
);
3658 return NT_STATUS_NO_MEMORY
;
3662 * Get the current state of the file.
3665 status
= vfs_stat_fsp(fsp
);
3666 if (!NT_STATUS_IS_OK(status
)) {
3670 /* Save the original element we check against. */
3671 orig_mode
= fsp
->fsp_name
->st
.st_ex_mode
;
3674 * Unpack the user/group/world id's.
3677 /* POSIX can't cope with missing owner/group. */
3678 if ((security_info_sent
& SECINFO_OWNER
) && (psd
->owner_sid
== NULL
)) {
3679 security_info_sent
&= ~SECINFO_OWNER
;
3681 if ((security_info_sent
& SECINFO_GROUP
) && (psd
->group_sid
== NULL
)) {
3682 security_info_sent
&= ~SECINFO_GROUP
;
3685 /* If UNIX owner is inherited and Windows isn't, then
3686 * setting the UNIX owner based on Windows owner conflicts
3687 * with the inheritance rule
3689 if (lp_inherit_owner(SNUM(conn
)) == INHERIT_OWNER_UNIX_ONLY
) {
3690 security_info_sent
&= ~SECINFO_OWNER
;
3693 status
= unpack_nt_owners( conn
, &user
, &grp
, security_info_sent
, psd
);
3694 if (!NT_STATUS_IS_OK(status
)) {
3699 * Do we need to chown ? If so this must be done first as the incoming
3700 * CREATOR_OWNER acl will be relative to the *new* owner, not the old.
3704 if (((user
!= (uid_t
)-1) && (fsp
->fsp_name
->st
.st_ex_uid
!= user
)) ||
3705 (( grp
!= (gid_t
)-1) && (fsp
->fsp_name
->st
.st_ex_gid
!= grp
))) {
3707 DEBUG(3,("set_nt_acl: chown %s. uid = %u, gid = %u.\n",
3708 fsp_str_dbg(fsp
), (unsigned int)user
,
3709 (unsigned int)grp
));
3711 status
= try_chown(fsp
, user
, grp
);
3712 if(!NT_STATUS_IS_OK(status
)) {
3713 DEBUG(3,("set_nt_acl: chown %s, %u, %u failed. Error "
3714 "= %s.\n", fsp_str_dbg(fsp
),
3717 nt_errstr(status
)));
3722 * Recheck the current state of the file, which may have changed.
3723 * (suid/sgid bits, for instance)
3726 status
= vfs_stat_fsp(fsp
);
3727 if (!NT_STATUS_IS_OK(status
)) {
3731 /* Save the original element we check against. */
3732 orig_mode
= fsp
->fsp_name
->st
.st_ex_mode
;
3734 /* If we successfully chowned, we know we must
3735 * be able to set the acl, so do it as root.
3737 set_acl_as_root
= true;
3740 create_file_sids(&fsp
->fsp_name
->st
, &file_owner_sid
, &file_grp_sid
);
3742 if((security_info_sent
& SECINFO_DACL
) &&
3743 (psd
->type
& SEC_DESC_DACL_PRESENT
) &&
3744 (psd
->dacl
== NULL
)) {
3745 struct security_ace ace
[3];
3747 /* We can't have NULL DACL in POSIX.
3748 Use owner/group/Everyone -> full access. */
3750 init_sec_ace(&ace
[0],
3752 SEC_ACE_TYPE_ACCESS_ALLOWED
,
3755 init_sec_ace(&ace
[1],
3757 SEC_ACE_TYPE_ACCESS_ALLOWED
,
3760 init_sec_ace(&ace
[2],
3762 SEC_ACE_TYPE_ACCESS_ALLOWED
,
3765 psd
->dacl
= make_sec_acl(talloc_tos(),
3769 if (psd
->dacl
== NULL
) {
3770 return NT_STATUS_NO_MEMORY
;
3772 security_acl_map_generic(psd
->dacl
, &file_generic_mapping
);
3775 acl_perms
= unpack_canon_ace(fsp
, &fsp
->fsp_name
->st
, &file_owner_sid
,
3776 &file_grp_sid
, &file_ace_list
,
3777 &dir_ace_list
, security_info_sent
, psd
);
3779 /* Ignore W2K traverse DACL set. */
3780 if (!file_ace_list
&& !dir_ace_list
) {
3781 return NT_STATUS_OK
;
3785 DEBUG(3,("set_nt_acl: cannot set permissions\n"));
3786 free_canon_ace_list(file_ace_list
);
3787 free_canon_ace_list(dir_ace_list
);
3788 return NT_STATUS_ACCESS_DENIED
;
3792 * Only change security if we got a DACL.
3795 if(!(security_info_sent
& SECINFO_DACL
) || (psd
->dacl
== NULL
)) {
3796 free_canon_ace_list(file_ace_list
);
3797 free_canon_ace_list(dir_ace_list
);
3798 return NT_STATUS_OK
;
3802 * Try using the POSIX ACL set first. Fall back to chmod if
3803 * we have no ACL support on this filesystem.
3806 if (acl_perms
&& file_ace_list
) {
3807 if (set_acl_as_root
) {
3810 ret
= set_canon_ace_list(fsp
, file_ace_list
, false,
3811 &fsp
->fsp_name
->st
, &acl_set_support
);
3812 if (set_acl_as_root
) {
3815 if (acl_set_support
&& ret
== false) {
3816 DEBUG(3,("set_nt_acl: failed to set file acl on file "
3817 "%s (%s).\n", fsp_str_dbg(fsp
),
3819 free_canon_ace_list(file_ace_list
);
3820 free_canon_ace_list(dir_ace_list
);
3821 return map_nt_error_from_unix(errno
);
3825 if (acl_perms
&& acl_set_support
&& fsp
->fsp_flags
.is_directory
) {
3827 if (set_acl_as_root
) {
3830 ret
= set_canon_ace_list(fsp
, dir_ace_list
, true,
3833 if (set_acl_as_root
) {
3837 DEBUG(3,("set_nt_acl: failed to set default "
3838 "acl on directory %s (%s).\n",
3839 fsp_str_dbg(fsp
), strerror(errno
)));
3840 free_canon_ace_list(file_ace_list
);
3841 free_canon_ace_list(dir_ace_list
);
3842 return map_nt_error_from_unix(errno
);
3848 * No default ACL - delete one if it exists.
3851 if (set_acl_as_root
) {
3854 sret
= SMB_VFS_SYS_ACL_DELETE_DEF_FILE(conn
,
3856 if (set_acl_as_root
) {
3860 if (acl_group_override(conn
, fsp
->fsp_name
)) {
3861 DEBUG(5,("set_nt_acl: acl group "
3862 "control on and current user "
3863 "in file %s primary group. "
3864 "Override delete_def_acl\n",
3869 SMB_VFS_SYS_ACL_DELETE_DEF_FILE(
3876 DEBUG(3,("set_nt_acl: sys_acl_delete_def_file failed (%s)\n", strerror(errno
)));
3877 free_canon_ace_list(file_ace_list
);
3878 free_canon_ace_list(dir_ace_list
);
3879 return map_nt_error_from_unix(errno
);
3885 if (acl_set_support
) {
3886 if (set_acl_as_root
) {
3889 store_inheritance_attributes(fsp
,
3893 if (set_acl_as_root
) {
3899 * If we cannot set using POSIX ACLs we fall back to checking if we need to chmod.
3902 if(!acl_set_support
&& acl_perms
) {
3905 if (!convert_canon_ace_to_posix_perms( fsp
, file_ace_list
, &posix_perms
)) {
3906 free_canon_ace_list(file_ace_list
);
3907 free_canon_ace_list(dir_ace_list
);
3908 DEBUG(3,("set_nt_acl: failed to convert file acl to "
3909 "posix permissions for file %s.\n",
3911 return NT_STATUS_ACCESS_DENIED
;
3914 if (orig_mode
!= posix_perms
) {
3917 DEBUG(3,("set_nt_acl: chmod %s. perms = 0%o.\n",
3918 fsp_str_dbg(fsp
), (unsigned int)posix_perms
));
3920 if (set_acl_as_root
) {
3923 sret
= SMB_VFS_FCHMOD(fsp
, posix_perms
);
3924 if (set_acl_as_root
) {
3928 if (acl_group_override(conn
, fsp
->fsp_name
)) {
3929 DEBUG(5,("set_nt_acl: acl group "
3930 "control on and current user "
3931 "in file %s primary group. "
3936 sret
= SMB_VFS_FCHMOD(fsp
, posix_perms
);
3941 DEBUG(3,("set_nt_acl: chmod %s, 0%o "
3942 "failed. Error = %s.\n",
3944 (unsigned int)posix_perms
,
3946 free_canon_ace_list(file_ace_list
);
3947 free_canon_ace_list(dir_ace_list
);
3948 return map_nt_error_from_unix(errno
);
3954 free_canon_ace_list(file_ace_list
);
3955 free_canon_ace_list(dir_ace_list
);
3957 /* Ensure the stat struct in the fsp is correct. */
3958 status
= vfs_stat_fsp(fsp
);
3960 return NT_STATUS_OK
;
3963 /****************************************************************************
3964 Get the actual group bits stored on a file with an ACL. Has no effect if
3965 the file has no ACL. Needed in dosmode code where the stat() will return
3966 the mask bits, not the real group bits, for a file with an ACL.
3967 ****************************************************************************/
3969 int get_acl_group_bits( connection_struct
*conn
,
3970 const struct smb_filename
*smb_fname
,
3973 int entry_id
= SMB_ACL_FIRST_ENTRY
;
3974 SMB_ACL_ENTRY_T entry
;
3975 SMB_ACL_T posix_acl
;
3978 posix_acl
= SMB_VFS_SYS_ACL_GET_FILE(conn
, smb_fname
,
3979 SMB_ACL_TYPE_ACCESS
, talloc_tos());
3980 if (posix_acl
== (SMB_ACL_T
)NULL
)
3983 while (sys_acl_get_entry(posix_acl
, entry_id
, &entry
) == 1) {
3984 SMB_ACL_TAG_T tagtype
;
3985 SMB_ACL_PERMSET_T permset
;
3987 entry_id
= SMB_ACL_NEXT_ENTRY
;
3989 if (sys_acl_get_tag_type(entry
, &tagtype
) ==-1)
3992 if (tagtype
== SMB_ACL_GROUP_OBJ
) {
3993 if (sys_acl_get_permset(entry
, &permset
) == -1) {
3996 *mode
&= ~(S_IRGRP
|S_IWGRP
|S_IXGRP
);
3997 *mode
|= (sys_acl_get_perm(permset
, SMB_ACL_READ
) ? S_IRGRP
: 0);
3998 *mode
|= (sys_acl_get_perm(permset
, SMB_ACL_WRITE
) ? S_IWGRP
: 0);
3999 *mode
|= (sys_acl_get_perm(permset
, SMB_ACL_EXECUTE
) ? S_IXGRP
: 0);
4005 TALLOC_FREE(posix_acl
);
4009 /****************************************************************************
4010 Do a chmod by setting the ACL USER_OBJ, GROUP_OBJ and OTHER bits in an ACL
4011 and set the mask to rwx. Needed to preserve complex ACLs set by NT.
4012 ****************************************************************************/
4014 static int chmod_acl_internals( connection_struct
*conn
, SMB_ACL_T posix_acl
, mode_t mode
)
4016 int entry_id
= SMB_ACL_FIRST_ENTRY
;
4017 SMB_ACL_ENTRY_T entry
;
4018 int num_entries
= 0;
4020 while ( sys_acl_get_entry(posix_acl
, entry_id
, &entry
) == 1) {
4021 SMB_ACL_TAG_T tagtype
;
4022 SMB_ACL_PERMSET_T permset
;
4025 entry_id
= SMB_ACL_NEXT_ENTRY
;
4027 if (sys_acl_get_tag_type(entry
, &tagtype
) == -1)
4030 if (sys_acl_get_permset(entry
, &permset
) == -1)
4036 case SMB_ACL_USER_OBJ
:
4037 perms
= unix_perms_to_acl_perms(mode
, S_IRUSR
, S_IWUSR
, S_IXUSR
);
4039 case SMB_ACL_GROUP_OBJ
:
4040 perms
= unix_perms_to_acl_perms(mode
, S_IRGRP
, S_IWGRP
, S_IXGRP
);
4044 * FIXME: The ACL_MASK entry permissions should really be set to
4045 * the union of the permissions of all ACL_USER,
4046 * ACL_GROUP_OBJ, and ACL_GROUP entries. That's what
4047 * acl_calc_mask() does, but Samba ACLs doesn't provide it.
4049 perms
= S_IRUSR
|S_IWUSR
|S_IXUSR
;
4052 perms
= unix_perms_to_acl_perms(mode
, S_IROTH
, S_IWOTH
, S_IXOTH
);
4058 if (map_acl_perms_to_permset(perms
, &permset
) == -1)
4061 if (sys_acl_set_permset(entry
, permset
) == -1)
4066 * If this is a simple 3 element ACL or no elements then it's a standard
4067 * UNIX permission set. Just use chmod...
4070 if ((num_entries
== 3) || (num_entries
== 0))
4076 /****************************************************************************
4077 Get the access ACL of FROM, do a chmod by setting the ACL USER_OBJ,
4078 GROUP_OBJ and OTHER bits in an ACL and set the mask to rwx. Set the
4079 resulting ACL on TO. Note that name is in UNIX character set.
4080 ****************************************************************************/
4082 static int copy_access_posix_acl(connection_struct
*conn
,
4083 const struct smb_filename
*smb_fname_from
,
4084 const struct smb_filename
*smb_fname_to
,
4087 SMB_ACL_T posix_acl
= NULL
;
4090 if ((posix_acl
= SMB_VFS_SYS_ACL_GET_FILE(conn
, smb_fname_from
,
4091 SMB_ACL_TYPE_ACCESS
,
4092 talloc_tos())) == NULL
)
4095 if ((ret
= chmod_acl_internals(conn
, posix_acl
, mode
)) == -1)
4098 ret
= SMB_VFS_SYS_ACL_SET_FD(smb_fname_to
->fsp
,
4099 SMB_ACL_TYPE_ACCESS
, posix_acl
);
4103 TALLOC_FREE(posix_acl
);
4107 /****************************************************************************
4108 Check for an existing default POSIX ACL on a directory.
4109 ****************************************************************************/
4111 static bool directory_has_default_posix_acl(connection_struct
*conn
,
4112 const struct smb_filename
*smb_fname
)
4114 SMB_ACL_T def_acl
= SMB_VFS_SYS_ACL_GET_FILE(conn
, smb_fname
,
4115 SMB_ACL_TYPE_DEFAULT
,
4117 bool has_acl
= False
;
4118 SMB_ACL_ENTRY_T entry
;
4120 if (def_acl
!= NULL
&& (sys_acl_get_entry(def_acl
, SMB_ACL_FIRST_ENTRY
, &entry
) == 1)) {
4125 TALLOC_FREE(def_acl
);
4130 /****************************************************************************
4131 If the parent directory has no default ACL but it does have an Access ACL,
4132 inherit this Access ACL to file name.
4133 ****************************************************************************/
4135 int inherit_access_posix_acl(connection_struct
*conn
,
4136 struct smb_filename
*inherit_from_dir
,
4137 const struct smb_filename
*smb_fname
,
4140 if (directory_has_default_posix_acl(conn
, inherit_from_dir
))
4143 return copy_access_posix_acl(conn
, inherit_from_dir
, smb_fname
, mode
);
4146 /****************************************************************************
4147 Map from wire type to permset.
4148 ****************************************************************************/
4150 static bool unix_ex_wire_to_permset(connection_struct
*conn
, unsigned char wire_perm
, SMB_ACL_PERMSET_T
*p_permset
)
4152 if (wire_perm
& ~(SMB_POSIX_ACL_READ
|SMB_POSIX_ACL_WRITE
|SMB_POSIX_ACL_EXECUTE
)) {
4156 if (sys_acl_clear_perms(*p_permset
) == -1) {
4160 if (wire_perm
& SMB_POSIX_ACL_READ
) {
4161 if (sys_acl_add_perm(*p_permset
, SMB_ACL_READ
) == -1) {
4165 if (wire_perm
& SMB_POSIX_ACL_WRITE
) {
4166 if (sys_acl_add_perm(*p_permset
, SMB_ACL_WRITE
) == -1) {
4170 if (wire_perm
& SMB_POSIX_ACL_EXECUTE
) {
4171 if (sys_acl_add_perm(*p_permset
, SMB_ACL_EXECUTE
) == -1) {
4178 /****************************************************************************
4179 Map from wire type to tagtype.
4180 ****************************************************************************/
4182 static bool unix_ex_wire_to_tagtype(unsigned char wire_tt
, SMB_ACL_TAG_T
*p_tt
)
4185 case SMB_POSIX_ACL_USER_OBJ
:
4186 *p_tt
= SMB_ACL_USER_OBJ
;
4188 case SMB_POSIX_ACL_USER
:
4189 *p_tt
= SMB_ACL_USER
;
4191 case SMB_POSIX_ACL_GROUP_OBJ
:
4192 *p_tt
= SMB_ACL_GROUP_OBJ
;
4194 case SMB_POSIX_ACL_GROUP
:
4195 *p_tt
= SMB_ACL_GROUP
;
4197 case SMB_POSIX_ACL_MASK
:
4198 *p_tt
= SMB_ACL_MASK
;
4200 case SMB_POSIX_ACL_OTHER
:
4201 *p_tt
= SMB_ACL_OTHER
;
4209 /****************************************************************************
4210 Create a new POSIX acl from wire permissions.
4211 FIXME ! How does the share mask/mode fit into this.... ?
4212 ****************************************************************************/
4214 static SMB_ACL_T
create_posix_acl_from_wire(connection_struct
*conn
,
4217 TALLOC_CTX
*mem_ctx
)
4220 SMB_ACL_T the_acl
= sys_acl_init(mem_ctx
);
4222 if (the_acl
== NULL
) {
4226 for (i
= 0; i
< num_acls
; i
++) {
4227 SMB_ACL_ENTRY_T the_entry
;
4228 SMB_ACL_PERMSET_T the_permset
;
4229 SMB_ACL_TAG_T tag_type
;
4231 if (sys_acl_create_entry(&the_acl
, &the_entry
) == -1) {
4232 DEBUG(0,("create_posix_acl_from_wire: Failed to create entry %u. (%s)\n",
4233 i
, strerror(errno
) ));
4237 if (!unix_ex_wire_to_tagtype(CVAL(pdata
,(i
*SMB_POSIX_ACL_ENTRY_SIZE
)), &tag_type
)) {
4238 DEBUG(0,("create_posix_acl_from_wire: invalid wire tagtype %u on entry %u.\n",
4239 CVAL(pdata
,(i
*SMB_POSIX_ACL_ENTRY_SIZE
)), i
));
4243 if (sys_acl_set_tag_type(the_entry
, tag_type
) == -1) {
4244 DEBUG(0,("create_posix_acl_from_wire: Failed to set tagtype on entry %u. (%s)\n",
4245 i
, strerror(errno
) ));
4249 /* Get the permset pointer from the new ACL entry. */
4250 if (sys_acl_get_permset(the_entry
, &the_permset
) == -1) {
4251 DEBUG(0,("create_posix_acl_from_wire: Failed to get permset on entry %u. (%s)\n",
4252 i
, strerror(errno
) ));
4256 /* Map from wire to permissions. */
4257 if (!unix_ex_wire_to_permset(conn
, CVAL(pdata
,(i
*SMB_POSIX_ACL_ENTRY_SIZE
)+1), &the_permset
)) {
4258 DEBUG(0,("create_posix_acl_from_wire: invalid permset %u on entry %u.\n",
4259 CVAL(pdata
,(i
*SMB_POSIX_ACL_ENTRY_SIZE
) + 1), i
));
4263 /* Now apply to the new ACL entry. */
4264 if (sys_acl_set_permset(the_entry
, the_permset
) == -1) {
4265 DEBUG(0,("create_posix_acl_from_wire: Failed to add permset on entry %u. (%s)\n",
4266 i
, strerror(errno
) ));
4270 if (tag_type
== SMB_ACL_USER
) {
4271 uint32_t uidval
= IVAL(pdata
,(i
*SMB_POSIX_ACL_ENTRY_SIZE
)+2);
4272 uid_t uid
= (uid_t
)uidval
;
4273 if (sys_acl_set_qualifier(the_entry
,(void *)&uid
) == -1) {
4274 DEBUG(0,("create_posix_acl_from_wire: Failed to set uid %u on entry %u. (%s)\n",
4275 (unsigned int)uid
, i
, strerror(errno
) ));
4280 if (tag_type
== SMB_ACL_GROUP
) {
4281 uint32_t gidval
= IVAL(pdata
,(i
*SMB_POSIX_ACL_ENTRY_SIZE
)+2);
4282 gid_t gid
= (uid_t
)gidval
;
4283 if (sys_acl_set_qualifier(the_entry
,(void *)&gid
) == -1) {
4284 DEBUG(0,("create_posix_acl_from_wire: Failed to set gid %u on entry %u. (%s)\n",
4285 (unsigned int)gid
, i
, strerror(errno
) ));
4295 if (the_acl
!= NULL
) {
4296 TALLOC_FREE(the_acl
);
4301 /****************************************************************************
4302 Calls from UNIX extensions - Default POSIX ACL set.
4303 If num_def_acls == 0 and not a directory just return. If it is a directory
4304 and num_def_acls == 0 then remove the default acl. Else set the default acl
4306 ****************************************************************************/
4308 NTSTATUS
set_unix_posix_default_acl(connection_struct
*conn
,
4310 uint16_t num_def_acls
,
4313 SMB_ACL_T def_acl
= NULL
;
4317 if (!fsp
->fsp_flags
.is_directory
) {
4318 return NT_STATUS_INVALID_HANDLE
;
4321 if (!num_def_acls
) {
4322 /* Remove the default ACL. */
4323 ret
= SMB_VFS_SYS_ACL_DELETE_DEF_FILE(conn
, fsp
->fsp_name
);
4325 status
= map_nt_error_from_unix(errno
);
4326 DBG_INFO("acl_delete_def_file failed on "
4327 "directory %s (%s)\n",
4332 return NT_STATUS_OK
;
4335 def_acl
= create_posix_acl_from_wire(conn
,
4339 if (def_acl
== NULL
) {
4340 return map_nt_error_from_unix(errno
);
4343 ret
= SMB_VFS_SYS_ACL_SET_FD(fsp
,
4344 SMB_ACL_TYPE_DEFAULT
,
4347 status
= map_nt_error_from_unix(errno
);
4348 DBG_INFO("acl_set_file failed on directory %s (%s)\n",
4351 TALLOC_FREE(def_acl
);
4355 DBG_DEBUG("set default acl for file %s\n",
4357 TALLOC_FREE(def_acl
);
4358 return NT_STATUS_OK
;
4361 /****************************************************************************
4362 Remove an ACL from a file. As we don't have acl_delete_entry() available
4363 we must read the current acl and copy all entries except MASK, USER and GROUP
4364 to a new acl, then set that. This (at least on Linux) causes any ACL to be
4366 FIXME ! How does the share mask/mode fit into this.... ?
4367 ****************************************************************************/
4369 static NTSTATUS
remove_posix_acl(connection_struct
*conn
,
4372 SMB_ACL_T file_acl
= NULL
;
4373 int entry_id
= SMB_ACL_FIRST_ENTRY
;
4374 SMB_ACL_ENTRY_T entry
;
4375 /* Create a new ACL with only 3 entries, u/g/w. */
4376 SMB_ACL_T new_file_acl
= NULL
;
4377 SMB_ACL_ENTRY_T user_ent
= NULL
;
4378 SMB_ACL_ENTRY_T group_ent
= NULL
;
4379 SMB_ACL_ENTRY_T other_ent
= NULL
;
4383 new_file_acl
= sys_acl_init(talloc_tos());
4384 if (new_file_acl
== NULL
) {
4385 status
= map_nt_error_from_unix(errno
);
4386 DBG_INFO("failed to init new ACL with 3 entries "
4387 "for file %s %s.\n",
4393 /* Now create the u/g/w entries. */
4394 ret
= sys_acl_create_entry(&new_file_acl
, &user_ent
);
4396 status
= map_nt_error_from_unix(errno
);
4397 DBG_INFO("Failed to create user entry for file %s. (%s)\n",
4402 ret
= sys_acl_set_tag_type(user_ent
, SMB_ACL_USER_OBJ
);
4404 status
= map_nt_error_from_unix(errno
);
4405 DBG_INFO("Failed to set user entry for file %s. (%s)\n",
4411 ret
= sys_acl_create_entry(&new_file_acl
, &group_ent
);
4413 status
= map_nt_error_from_unix(errno
);
4414 DBG_INFO("Failed to create group entry for file %s. (%s)\n",
4419 ret
= sys_acl_set_tag_type(group_ent
, SMB_ACL_GROUP_OBJ
);
4421 status
= map_nt_error_from_unix(errno
);
4422 DBG_INFO("Failed to set group entry for file %s. (%s)\n",
4428 ret
= sys_acl_create_entry(&new_file_acl
, &other_ent
);
4430 status
= map_nt_error_from_unix(errno
);
4431 DBG_INFO("Failed to create other entry for file %s. (%s)\n",
4436 ret
= sys_acl_set_tag_type(other_ent
, SMB_ACL_OTHER
);
4438 status
= map_nt_error_from_unix(errno
);
4439 DBG_INFO("Failed to set other entry for file %s. (%s)\n",
4445 /* Get the current file ACL. */
4446 file_acl
= SMB_VFS_SYS_ACL_GET_FD(fsp
, talloc_tos());
4448 if (file_acl
== NULL
) {
4449 status
= map_nt_error_from_unix(errno
);
4450 /* This is only returned if an error occurred. Even for a file with
4451 no acl a u/g/w acl should be returned. */
4452 DBG_INFO("failed to get ACL from file %s (%s).\n",
4458 while ( sys_acl_get_entry(file_acl
, entry_id
, &entry
) == 1) {
4459 SMB_ACL_TAG_T tagtype
;
4460 SMB_ACL_PERMSET_T permset
;
4462 entry_id
= SMB_ACL_NEXT_ENTRY
;
4464 ret
= sys_acl_get_tag_type(entry
, &tagtype
);
4466 status
= map_nt_error_from_unix(errno
);
4467 DBG_INFO("failed to get tagtype from ACL "
4468 "on file %s (%s).\n",
4474 ret
= sys_acl_get_permset(entry
, &permset
);
4476 status
= map_nt_error_from_unix(errno
);
4477 DBG_INFO("failed to get permset from ACL "
4478 "on file %s (%s).\n",
4484 if (tagtype
== SMB_ACL_USER_OBJ
) {
4485 ret
= sys_acl_set_permset(user_ent
, permset
);
4487 status
= map_nt_error_from_unix(errno
);
4488 DBG_INFO("failed to set permset from ACL "
4489 "on file %s (%s).\n",
4494 } else if (tagtype
== SMB_ACL_GROUP_OBJ
) {
4495 ret
= sys_acl_set_permset(group_ent
, permset
);
4497 status
= map_nt_error_from_unix(errno
);
4498 DBG_INFO("failed to set permset from ACL "
4499 "on file %s (%s).\n",
4504 } else if (tagtype
== SMB_ACL_OTHER
) {
4505 ret
= sys_acl_set_permset(other_ent
, permset
);
4507 status
= map_nt_error_from_unix(errno
);
4508 DBG_INFO("failed to set permset from ACL "
4509 "on file %s (%s).\n",
4517 /* Set the new empty file ACL. */
4518 ret
= SMB_VFS_SYS_ACL_SET_FD(fsp
, SMB_ACL_TYPE_ACCESS
, new_file_acl
);
4520 status
= map_nt_error_from_unix(errno
);
4521 DBG_INFO("acl_set_file failed on %s (%s)\n",
4527 status
= NT_STATUS_OK
;
4531 TALLOC_FREE(file_acl
);
4532 TALLOC_FREE(new_file_acl
);
4536 /****************************************************************************
4537 Calls from UNIX extensions - POSIX ACL set.
4538 If num_def_acls == 0 then read/modify/write acl after removing all entries
4539 except SMB_ACL_USER_OBJ, SMB_ACL_GROUP_OBJ, SMB_ACL_OTHER.
4540 ****************************************************************************/
4542 NTSTATUS
set_unix_posix_acl(connection_struct
*conn
,
4547 SMB_ACL_T file_acl
= NULL
;
4552 /* Remove the ACL from the file. */
4553 return remove_posix_acl(conn
, fsp
);
4556 file_acl
= create_posix_acl_from_wire(conn
,
4560 if (file_acl
== NULL
) {
4561 return map_nt_error_from_unix(errno
);
4564 ret
= SMB_VFS_SYS_ACL_SET_FD(fsp
, SMB_ACL_TYPE_ACCESS
, file_acl
);
4566 status
= map_nt_error_from_unix(errno
);
4567 DBG_INFO("acl_set_file failed on %s (%s)\n",
4570 TALLOC_FREE(file_acl
);
4574 DBG_DEBUG("set acl for file %s\n",
4577 TALLOC_FREE(file_acl
);
4578 return NT_STATUS_OK
;
4581 int posix_sys_acl_blob_get_file(vfs_handle_struct
*handle
,
4582 const struct smb_filename
*smb_fname_in
,
4583 TALLOC_CTX
*mem_ctx
,
4584 char **blob_description
,
4588 TALLOC_CTX
*frame
= talloc_stackframe();
4589 /* Initialise this to zero, in a portable way */
4590 struct smb_acl_wrapper acl_wrapper
= {
4593 struct smb_filename
*smb_fname
= cp_smb_filename_nostream(frame
,
4595 if (smb_fname
== NULL
) {
4601 acl_wrapper
.access_acl
4602 = smb_vfs_call_sys_acl_get_file(handle
,
4604 SMB_ACL_TYPE_ACCESS
,
4607 ret
= smb_vfs_call_stat(handle
, smb_fname
);
4613 if (S_ISDIR(smb_fname
->st
.st_ex_mode
)) {
4614 acl_wrapper
.default_acl
4615 = smb_vfs_call_sys_acl_get_file(handle
,
4617 SMB_ACL_TYPE_DEFAULT
,
4621 acl_wrapper
.owner
= smb_fname
->st
.st_ex_uid
;
4622 acl_wrapper
.group
= smb_fname
->st
.st_ex_gid
;
4623 acl_wrapper
.mode
= smb_fname
->st
.st_ex_mode
;
4625 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_push_struct_blob(blob
, mem_ctx
,
4627 (ndr_push_flags_fn_t
)ndr_push_smb_acl_wrapper
))) {
4633 *blob_description
= talloc_strdup(mem_ctx
, "posix_acl");
4634 if (!*blob_description
) {
4644 int posix_sys_acl_blob_get_fd(vfs_handle_struct
*handle
,
4646 TALLOC_CTX
*mem_ctx
,
4647 char **blob_description
,
4650 SMB_STRUCT_STAT sbuf
;
4652 struct smb_acl_wrapper acl_wrapper
= { 0 };
4653 int fd
= fsp_get_pathref_fd(fsp
);
4654 char buf
[PATH_MAX
] = {0};
4655 struct smb_filename fname
;
4658 if (fsp
->fsp_flags
.have_proc_fds
) {
4659 const char *proc_fd_path
= NULL
;
4661 proc_fd_path
= sys_proc_fd_path(fd
, buf
, sizeof(buf
));
4662 if (proc_fd_path
== NULL
) {
4666 fname
= (struct smb_filename
) {
4667 .base_name
= discard_const_p(char, proc_fd_path
),
4671 * This is no longer a handle based call.
4674 fname
= (struct smb_filename
) {
4675 .base_name
= fsp
->fsp_name
->base_name
,
4679 frame
= talloc_stackframe();
4681 acl_wrapper
.access_acl
= smb_vfs_call_sys_acl_get_file(
4684 SMB_ACL_TYPE_ACCESS
,
4687 if (fsp
->fsp_flags
.is_directory
) {
4688 acl_wrapper
.default_acl
= smb_vfs_call_sys_acl_get_file(
4691 SMB_ACL_TYPE_DEFAULT
,
4695 ret
= smb_vfs_call_fstat(handle
, fsp
, &sbuf
);
4701 acl_wrapper
.owner
= sbuf
.st_ex_uid
;
4702 acl_wrapper
.group
= sbuf
.st_ex_gid
;
4703 acl_wrapper
.mode
= sbuf
.st_ex_mode
;
4705 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_push_struct_blob(blob
, mem_ctx
,
4707 (ndr_push_flags_fn_t
)ndr_push_smb_acl_wrapper
))) {
4713 *blob_description
= talloc_strdup(mem_ctx
, "posix_acl");
4714 if (!*blob_description
) {
4724 static NTSTATUS
make_default_acl_posix(TALLOC_CTX
*ctx
,
4726 const SMB_STRUCT_STAT
*psbuf
,
4727 struct security_descriptor
**ppdesc
)
4729 struct dom_sid owner_sid
, group_sid
;
4731 struct security_ace aces
[4];
4732 uint32_t access_mask
= 0;
4733 mode_t mode
= psbuf
->st_ex_mode
;
4734 struct security_acl
*new_dacl
= NULL
;
4737 DBG_DEBUG("file %s mode = 0%o\n",name
, (int)mode
);
4739 uid_to_sid(&owner_sid
, psbuf
->st_ex_uid
);
4740 gid_to_sid(&group_sid
, psbuf
->st_ex_gid
);
4743 We provide up to 4 ACEs
4750 if (mode
& S_IRUSR
) {
4751 if (mode
& S_IWUSR
) {
4752 access_mask
|= SEC_RIGHTS_FILE_ALL
;
4754 access_mask
|= SEC_RIGHTS_FILE_READ
| SEC_FILE_EXECUTE
;
4757 if (mode
& S_IWUSR
) {
4758 access_mask
|= SEC_RIGHTS_FILE_WRITE
| SEC_STD_DELETE
;
4761 init_sec_ace(&aces
[idx
],
4763 SEC_ACE_TYPE_ACCESS_ALLOWED
,
4769 if (mode
& S_IRGRP
) {
4770 access_mask
|= SEC_RIGHTS_FILE_READ
| SEC_FILE_EXECUTE
;
4772 if (mode
& S_IWGRP
) {
4773 /* note that delete is not granted - this matches posix behaviour */
4774 access_mask
|= SEC_RIGHTS_FILE_WRITE
;
4777 init_sec_ace(&aces
[idx
],
4779 SEC_ACE_TYPE_ACCESS_ALLOWED
,
4786 if (mode
& S_IROTH
) {
4787 access_mask
|= SEC_RIGHTS_FILE_READ
| SEC_FILE_EXECUTE
;
4789 if (mode
& S_IWOTH
) {
4790 access_mask
|= SEC_RIGHTS_FILE_WRITE
;
4793 init_sec_ace(&aces
[idx
],
4795 SEC_ACE_TYPE_ACCESS_ALLOWED
,
4801 init_sec_ace(&aces
[idx
],
4803 SEC_ACE_TYPE_ACCESS_ALLOWED
,
4804 SEC_RIGHTS_FILE_ALL
,
4808 new_dacl
= make_sec_acl(ctx
,
4814 return NT_STATUS_NO_MEMORY
;
4817 *ppdesc
= make_sec_desc(ctx
,
4818 SECURITY_DESCRIPTOR_REVISION_1
,
4819 SEC_DESC_SELF_RELATIVE
|SEC_DESC_DACL_PRESENT
,
4826 return NT_STATUS_NO_MEMORY
;
4828 return NT_STATUS_OK
;
4831 static NTSTATUS
make_default_acl_windows(TALLOC_CTX
*ctx
,
4833 const SMB_STRUCT_STAT
*psbuf
,
4834 struct security_descriptor
**ppdesc
)
4836 struct dom_sid owner_sid
, group_sid
;
4838 struct security_ace aces
[4];
4839 uint32_t access_mask
= 0;
4840 mode_t mode
= psbuf
->st_ex_mode
;
4841 struct security_acl
*new_dacl
= NULL
;
4844 DBG_DEBUG("file [%s] mode [0%o]\n", name
, (int)mode
);
4846 uid_to_sid(&owner_sid
, psbuf
->st_ex_uid
);
4847 gid_to_sid(&group_sid
, psbuf
->st_ex_gid
);
4850 * We provide 2 ACEs:
4855 if (mode
& S_IRUSR
) {
4856 if (mode
& S_IWUSR
) {
4857 access_mask
|= SEC_RIGHTS_FILE_ALL
;
4859 access_mask
|= SEC_RIGHTS_FILE_READ
| SEC_FILE_EXECUTE
;
4862 if (mode
& S_IWUSR
) {
4863 access_mask
|= SEC_RIGHTS_FILE_WRITE
| SEC_STD_DELETE
;
4866 init_sec_ace(&aces
[idx
],
4868 SEC_ACE_TYPE_ACCESS_ALLOWED
,
4873 init_sec_ace(&aces
[idx
],
4875 SEC_ACE_TYPE_ACCESS_ALLOWED
,
4876 SEC_RIGHTS_FILE_ALL
,
4880 new_dacl
= make_sec_acl(ctx
,
4886 return NT_STATUS_NO_MEMORY
;
4889 *ppdesc
= make_sec_desc(ctx
,
4890 SECURITY_DESCRIPTOR_REVISION_1
,
4891 SEC_DESC_SELF_RELATIVE
|SEC_DESC_DACL_PRESENT
,
4898 return NT_STATUS_NO_MEMORY
;
4900 return NT_STATUS_OK
;
4903 static NTSTATUS
make_default_acl_everyone(TALLOC_CTX
*ctx
,
4905 const SMB_STRUCT_STAT
*psbuf
,
4906 struct security_descriptor
**ppdesc
)
4908 struct dom_sid owner_sid
, group_sid
;
4910 struct security_ace aces
[1];
4911 mode_t mode
= psbuf
->st_ex_mode
;
4912 struct security_acl
*new_dacl
= NULL
;
4915 DBG_DEBUG("file [%s] mode [0%o]\n", name
, (int)mode
);
4917 uid_to_sid(&owner_sid
, psbuf
->st_ex_uid
);
4918 gid_to_sid(&group_sid
, psbuf
->st_ex_gid
);
4921 * We provide one ACEs: full access for everyone
4924 init_sec_ace(&aces
[idx
],
4926 SEC_ACE_TYPE_ACCESS_ALLOWED
,
4927 SEC_RIGHTS_FILE_ALL
,
4931 new_dacl
= make_sec_acl(ctx
,
4937 return NT_STATUS_NO_MEMORY
;
4940 *ppdesc
= make_sec_desc(ctx
,
4941 SECURITY_DESCRIPTOR_REVISION_1
,
4942 SEC_DESC_SELF_RELATIVE
|SEC_DESC_DACL_PRESENT
,
4949 return NT_STATUS_NO_MEMORY
;
4951 return NT_STATUS_OK
;
4954 static const struct enum_list default_acl_style_list
[] = {
4955 {DEFAULT_ACL_POSIX
, "posix"},
4956 {DEFAULT_ACL_WINDOWS
, "windows"},
4957 {DEFAULT_ACL_EVERYONE
, "everyone"},
4960 const struct enum_list
*get_default_acl_style_list(void)
4962 return default_acl_style_list
;
4965 NTSTATUS
make_default_filesystem_acl(
4967 enum default_acl_style acl_style
,
4969 const SMB_STRUCT_STAT
*psbuf
,
4970 struct security_descriptor
**ppdesc
)
4974 switch (acl_style
) {
4975 case DEFAULT_ACL_POSIX
:
4976 status
= make_default_acl_posix(ctx
, name
, psbuf
, ppdesc
);
4979 case DEFAULT_ACL_WINDOWS
:
4980 status
= make_default_acl_windows(ctx
, name
, psbuf
, ppdesc
);
4983 case DEFAULT_ACL_EVERYONE
:
4984 status
= make_default_acl_everyone(ctx
, name
, psbuf
, ppdesc
);
4988 DBG_ERR("unknown acl style %d", acl_style
);
4989 status
= NT_STATUS_INTERNAL_ERROR
;