2 Unix SMB/CIFS implementation.
3 SMB NT Security Descriptor / Unix permission conversion.
4 Copyright (C) Jeremy Allison 1994-2000.
5 Copyright (C) Andreas Gruenbacher 2002.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24 extern struct current_user current_user
;
25 extern struct generic_mapping file_generic_mapping
;
28 #define DBGC_CLASS DBGC_ACLS
30 /****************************************************************************
31 Data structures representing the internal ACE format.
32 ****************************************************************************/
34 enum ace_owner
{UID_ACE
, GID_ACE
, WORLD_ACE
};
35 enum ace_attribute
{ALLOW_ACE
, DENY_ACE
}; /* Used for incoming NT ACLS. */
37 typedef union posix_id
{
43 typedef struct canon_ace
{
44 struct canon_ace
*next
, *prev
;
46 mode_t perms
; /* Only use S_I(R|W|X)USR mode bits here. */
48 enum ace_owner owner_type
;
49 enum ace_attribute attr
;
54 #define ALL_ACE_PERMS (S_IRUSR|S_IWUSR|S_IXUSR)
57 * EA format of user.SAMBA_PAI (Samba_Posix_Acl_Interitance)
60 * | 1 | 1 | 2 | 2 | ....
61 * +------+------+-------------+---------------------+-------------+--------------------+
62 * | vers | flag | num_entries | num_default_entries | ..entries.. | default_entries... |
63 * +------+------+-------------+---------------------+-------------+--------------------+
66 #define PAI_VERSION_OFFSET 0
67 #define PAI_FLAG_OFFSET 1
68 #define PAI_NUM_ENTRIES_OFFSET 2
69 #define PAI_NUM_DEFAULT_ENTRIES_OFFSET 4
70 #define PAI_ENTRIES_BASE 6
73 #define PAI_ACL_FLAG_PROTECTED 0x1
74 #define PAI_ENTRY_LENGTH 5
77 * In memory format of user.SAMBA_PAI attribute.
81 struct pai_entry
*next
, *prev
;
82 enum ace_owner owner_type
;
88 unsigned int num_entries
;
89 struct pai_entry
*entry_list
;
90 unsigned int num_def_entries
;
91 struct pai_entry
*def_entry_list
;
94 /************************************************************************
95 Return a uint32 of the pai_entry principal.
96 ************************************************************************/
98 static uint32
get_pai_entry_val(struct pai_entry
*paie
)
100 switch (paie
->owner_type
) {
102 DEBUG(10,("get_pai_entry_val: uid = %u\n", (unsigned int)paie
->unix_ug
.uid
));
103 return (uint32
)paie
->unix_ug
.uid
;
105 DEBUG(10,("get_pai_entry_val: gid = %u\n", (unsigned int)paie
->unix_ug
.gid
));
106 return (uint32
)paie
->unix_ug
.gid
;
109 DEBUG(10,("get_pai_entry_val: world ace\n"));
114 /************************************************************************
115 Return a uint32 of the entry principal.
116 ************************************************************************/
118 static uint32
get_entry_val(canon_ace
*ace_entry
)
120 switch (ace_entry
->owner_type
) {
122 DEBUG(10,("get_entry_val: uid = %u\n", (unsigned int)ace_entry
->unix_ug
.uid
));
123 return (uint32
)ace_entry
->unix_ug
.uid
;
125 DEBUG(10,("get_entry_val: gid = %u\n", (unsigned int)ace_entry
->unix_ug
.gid
));
126 return (uint32
)ace_entry
->unix_ug
.gid
;
129 DEBUG(10,("get_entry_val: world ace\n"));
134 /************************************************************************
135 Count the inherited entries.
136 ************************************************************************/
138 static unsigned int num_inherited_entries(canon_ace
*ace_list
)
140 unsigned int num_entries
= 0;
142 for (; ace_list
; ace_list
= ace_list
->next
)
143 if (ace_list
->inherited
)
148 /************************************************************************
149 Create the on-disk format. Caller must free.
150 ************************************************************************/
152 static char *create_pai_buf(canon_ace
*file_ace_list
, canon_ace
*dir_ace_list
, BOOL pai_protected
, size_t *store_size
)
154 char *pai_buf
= NULL
;
155 canon_ace
*ace_list
= NULL
;
156 char *entry_offset
= NULL
;
157 unsigned int num_entries
= 0;
158 unsigned int num_def_entries
= 0;
160 for (ace_list
= file_ace_list
; ace_list
; ace_list
= ace_list
->next
)
161 if (ace_list
->inherited
)
164 for (ace_list
= dir_ace_list
; ace_list
; ace_list
= ace_list
->next
)
165 if (ace_list
->inherited
)
168 DEBUG(10,("create_pai_buf: num_entries = %u, num_def_entries = %u\n", num_entries
, num_def_entries
));
170 *store_size
= PAI_ENTRIES_BASE
+ ((num_entries
+ num_def_entries
)*PAI_ENTRY_LENGTH
);
172 pai_buf
= SMB_MALLOC(*store_size
);
177 /* Set up the header. */
178 memset(pai_buf
, '\0', PAI_ENTRIES_BASE
);
179 SCVAL(pai_buf
,PAI_VERSION_OFFSET
,PAI_VERSION
);
180 SCVAL(pai_buf
,PAI_FLAG_OFFSET
,(pai_protected
? PAI_ACL_FLAG_PROTECTED
: 0));
181 SSVAL(pai_buf
,PAI_NUM_ENTRIES_OFFSET
,num_entries
);
182 SSVAL(pai_buf
,PAI_NUM_DEFAULT_ENTRIES_OFFSET
,num_def_entries
);
184 entry_offset
= pai_buf
+ PAI_ENTRIES_BASE
;
186 for (ace_list
= file_ace_list
; ace_list
; ace_list
= ace_list
->next
) {
187 if (ace_list
->inherited
) {
188 uint8 type_val
= (unsigned char)ace_list
->owner_type
;
189 uint32 entry_val
= get_entry_val(ace_list
);
191 SCVAL(entry_offset
,0,type_val
);
192 SIVAL(entry_offset
,1,entry_val
);
193 entry_offset
+= PAI_ENTRY_LENGTH
;
197 for (ace_list
= dir_ace_list
; ace_list
; ace_list
= ace_list
->next
) {
198 if (ace_list
->inherited
) {
199 uint8 type_val
= (unsigned char)ace_list
->owner_type
;
200 uint32 entry_val
= get_entry_val(ace_list
);
202 SCVAL(entry_offset
,0,type_val
);
203 SIVAL(entry_offset
,1,entry_val
);
204 entry_offset
+= PAI_ENTRY_LENGTH
;
211 /************************************************************************
212 Store the user.SAMBA_PAI attribute on disk.
213 ************************************************************************/
215 static void store_inheritance_attributes(files_struct
*fsp
, canon_ace
*file_ace_list
,
216 canon_ace
*dir_ace_list
, BOOL pai_protected
)
222 if (!lp_map_acl_inherit(SNUM(fsp
->conn
)))
226 * Don't store if this ACL isn't protected and
227 * none of the entries in it are marked as inherited.
230 if (!pai_protected
&& num_inherited_entries(file_ace_list
) == 0 && num_inherited_entries(dir_ace_list
) == 0) {
231 /* Instead just remove the attribute if it exists. */
232 if (fsp
->fh
->fd
!= -1)
233 SMB_VFS_FREMOVEXATTR(fsp
, fsp
->fh
->fd
, SAMBA_POSIX_INHERITANCE_EA_NAME
);
235 SMB_VFS_REMOVEXATTR(fsp
->conn
, fsp
->fsp_name
, SAMBA_POSIX_INHERITANCE_EA_NAME
);
239 pai_buf
= create_pai_buf(file_ace_list
, dir_ace_list
, pai_protected
, &store_size
);
241 if (fsp
->fh
->fd
!= -1)
242 ret
= SMB_VFS_FSETXATTR(fsp
, fsp
->fh
->fd
, SAMBA_POSIX_INHERITANCE_EA_NAME
,
243 pai_buf
, store_size
, 0);
245 ret
= SMB_VFS_SETXATTR(fsp
->conn
,fsp
->fsp_name
, SAMBA_POSIX_INHERITANCE_EA_NAME
,
246 pai_buf
, store_size
, 0);
250 DEBUG(10,("store_inheritance_attribute:%s for file %s\n", pai_protected
? " (protected)" : "", fsp
->fsp_name
));
251 if (ret
== -1 && !no_acl_syscall_error(errno
))
252 DEBUG(1,("store_inheritance_attribute: Error %s\n", strerror(errno
) ));
255 /************************************************************************
256 Delete the in memory inheritance info.
257 ************************************************************************/
259 static void free_inherited_info(struct pai_val
*pal
)
262 struct pai_entry
*paie
, *paie_next
;
263 for (paie
= pal
->entry_list
; paie
; paie
= paie_next
) {
264 paie_next
= paie
->next
;
267 for (paie
= pal
->def_entry_list
; paie
; paie
= paie_next
) {
268 paie_next
= paie
->next
;
275 /************************************************************************
276 Was this ACL protected ?
277 ************************************************************************/
279 static BOOL
get_protected_flag(struct pai_val
*pal
)
283 return pal
->pai_protected
;
286 /************************************************************************
287 Was this ACE inherited ?
288 ************************************************************************/
290 static BOOL
get_inherited_flag(struct pai_val
*pal
, canon_ace
*ace_entry
, BOOL default_ace
)
292 struct pai_entry
*paie
;
297 /* If the entry exists it is inherited. */
298 for (paie
= (default_ace
? pal
->def_entry_list
: pal
->entry_list
); paie
; paie
= paie
->next
) {
299 if (ace_entry
->owner_type
== paie
->owner_type
&&
300 get_entry_val(ace_entry
) == get_pai_entry_val(paie
))
306 /************************************************************************
307 Ensure an attribute just read is valid.
308 ************************************************************************/
310 static BOOL
check_pai_ok(char *pai_buf
, size_t pai_buf_data_size
)
313 uint16 num_def_entries
;
315 if (pai_buf_data_size
< PAI_ENTRIES_BASE
) {
316 /* Corrupted - too small. */
320 if (CVAL(pai_buf
,PAI_VERSION_OFFSET
) != PAI_VERSION
)
323 num_entries
= SVAL(pai_buf
,PAI_NUM_ENTRIES_OFFSET
);
324 num_def_entries
= SVAL(pai_buf
,PAI_NUM_DEFAULT_ENTRIES_OFFSET
);
326 /* Check the entry lists match. */
327 /* Each entry is 5 bytes (type plus 4 bytes of uid or gid). */
329 if (((num_entries
+ num_def_entries
)*PAI_ENTRY_LENGTH
) + PAI_ENTRIES_BASE
!= pai_buf_data_size
)
336 /************************************************************************
337 Convert to in-memory format.
338 ************************************************************************/
340 static struct pai_val
*create_pai_val(char *buf
, size_t size
)
343 struct pai_val
*paiv
= NULL
;
346 if (!check_pai_ok(buf
, size
))
349 paiv
= SMB_MALLOC_P(struct pai_val
);
353 memset(paiv
, '\0', sizeof(struct pai_val
));
355 paiv
->pai_protected
= (CVAL(buf
,PAI_FLAG_OFFSET
) == PAI_ACL_FLAG_PROTECTED
);
357 paiv
->num_entries
= SVAL(buf
,PAI_NUM_ENTRIES_OFFSET
);
358 paiv
->num_def_entries
= SVAL(buf
,PAI_NUM_DEFAULT_ENTRIES_OFFSET
);
360 entry_offset
= buf
+ PAI_ENTRIES_BASE
;
362 DEBUG(10,("create_pai_val:%s num_entries = %u, num_def_entries = %u\n",
363 paiv
->pai_protected
? " (pai_protected)" : "", paiv
->num_entries
, paiv
->num_def_entries
));
365 for (i
= 0; i
< paiv
->num_entries
; i
++) {
366 struct pai_entry
*paie
;
368 paie
= SMB_MALLOC_P(struct pai_entry
);
370 free_inherited_info(paiv
);
374 paie
->owner_type
= (enum ace_owner
)CVAL(entry_offset
,0);
375 switch( paie
->owner_type
) {
377 paie
->unix_ug
.uid
= (uid_t
)IVAL(entry_offset
,1);
378 DEBUG(10,("create_pai_val: uid = %u\n", (unsigned int)paie
->unix_ug
.uid
));
381 paie
->unix_ug
.gid
= (gid_t
)IVAL(entry_offset
,1);
382 DEBUG(10,("create_pai_val: gid = %u\n", (unsigned int)paie
->unix_ug
.gid
));
385 paie
->unix_ug
.world
= -1;
386 DEBUG(10,("create_pai_val: world ace\n"));
389 free_inherited_info(paiv
);
392 entry_offset
+= PAI_ENTRY_LENGTH
;
393 DLIST_ADD(paiv
->entry_list
, paie
);
396 for (i
= 0; i
< paiv
->num_def_entries
; i
++) {
397 struct pai_entry
*paie
;
399 paie
= SMB_MALLOC_P(struct pai_entry
);
401 free_inherited_info(paiv
);
405 paie
->owner_type
= (enum ace_owner
)CVAL(entry_offset
,0);
406 switch( paie
->owner_type
) {
408 paie
->unix_ug
.uid
= (uid_t
)IVAL(entry_offset
,1);
409 DEBUG(10,("create_pai_val: (def) uid = %u\n", (unsigned int)paie
->unix_ug
.uid
));
412 paie
->unix_ug
.gid
= (gid_t
)IVAL(entry_offset
,1);
413 DEBUG(10,("create_pai_val: (def) gid = %u\n", (unsigned int)paie
->unix_ug
.gid
));
416 paie
->unix_ug
.world
= -1;
417 DEBUG(10,("create_pai_val: (def) world ace\n"));
420 free_inherited_info(paiv
);
423 entry_offset
+= PAI_ENTRY_LENGTH
;
424 DLIST_ADD(paiv
->def_entry_list
, paie
);
430 /************************************************************************
431 Load the user.SAMBA_PAI attribute.
432 ************************************************************************/
434 static struct pai_val
*load_inherited_info(files_struct
*fsp
)
437 size_t pai_buf_size
= 1024;
438 struct pai_val
*paiv
= NULL
;
441 if (!lp_map_acl_inherit(SNUM(fsp
->conn
)))
444 if ((pai_buf
= SMB_MALLOC(pai_buf_size
)) == NULL
)
448 if (fsp
->fh
->fd
!= -1)
449 ret
= SMB_VFS_FGETXATTR(fsp
, fsp
->fh
->fd
, SAMBA_POSIX_INHERITANCE_EA_NAME
,
450 pai_buf
, pai_buf_size
);
452 ret
= SMB_VFS_GETXATTR(fsp
->conn
,fsp
->fsp_name
,SAMBA_POSIX_INHERITANCE_EA_NAME
,
453 pai_buf
, pai_buf_size
);
456 if (errno
!= ERANGE
) {
459 /* Buffer too small - enlarge it. */
462 if (pai_buf_size
> 1024*1024) {
463 return NULL
; /* Limit malloc to 1mb. */
465 if ((pai_buf
= SMB_MALLOC(pai_buf_size
)) == NULL
)
470 DEBUG(10,("load_inherited_info: ret = %lu for file %s\n", (unsigned long)ret
, fsp
->fsp_name
));
473 /* No attribute or not supported. */
475 if (errno
!= ENOATTR
)
476 DEBUG(10,("load_inherited_info: Error %s\n", strerror(errno
) ));
479 DEBUG(10,("load_inherited_info: Error %s\n", strerror(errno
) ));
485 paiv
= create_pai_val(pai_buf
, ret
);
487 if (paiv
&& paiv
->pai_protected
)
488 DEBUG(10,("load_inherited_info: ACL is protected for file %s\n", fsp
->fsp_name
));
494 /****************************************************************************
495 Functions to manipulate the internal ACE format.
496 ****************************************************************************/
498 /****************************************************************************
499 Count a linked list of canonical ACE entries.
500 ****************************************************************************/
502 static size_t count_canon_ace_list( canon_ace
*list_head
)
507 for (ace
= list_head
; ace
; ace
= ace
->next
)
513 /****************************************************************************
514 Free a linked list of canonical ACE entries.
515 ****************************************************************************/
517 static void free_canon_ace_list( canon_ace
*list_head
)
520 canon_ace
*old_head
= list_head
;
521 DLIST_REMOVE(list_head
, list_head
);
526 /****************************************************************************
527 Function to duplicate a canon_ace entry.
528 ****************************************************************************/
530 static canon_ace
*dup_canon_ace( canon_ace
*src_ace
)
532 canon_ace
*dst_ace
= SMB_MALLOC_P(canon_ace
);
538 dst_ace
->prev
= dst_ace
->next
= NULL
;
542 /****************************************************************************
543 Print out a canon ace.
544 ****************************************************************************/
546 static void print_canon_ace(canon_ace
*pace
, int num
)
550 dbgtext( "canon_ace index %d. Type = %s ", num
, pace
->attr
== ALLOW_ACE
? "allow" : "deny" );
551 dbgtext( "SID = %s ", sid_to_string( str
, &pace
->trustee
));
552 if (pace
->owner_type
== UID_ACE
) {
553 const char *u_name
= uidtoname(pace
->unix_ug
.uid
);
554 dbgtext( "uid %u (%s) ", (unsigned int)pace
->unix_ug
.uid
, u_name
);
555 } else if (pace
->owner_type
== GID_ACE
) {
556 char *g_name
= gidtoname(pace
->unix_ug
.gid
);
557 dbgtext( "gid %u (%s) ", (unsigned int)pace
->unix_ug
.gid
, g_name
);
560 switch (pace
->type
) {
562 dbgtext( "SMB_ACL_USER ");
564 case SMB_ACL_USER_OBJ
:
565 dbgtext( "SMB_ACL_USER_OBJ ");
568 dbgtext( "SMB_ACL_GROUP ");
570 case SMB_ACL_GROUP_OBJ
:
571 dbgtext( "SMB_ACL_GROUP_OBJ ");
574 dbgtext( "SMB_ACL_OTHER ");
578 dbgtext( "(inherited) ");
580 dbgtext( "%c", pace
->perms
& S_IRUSR
? 'r' : '-');
581 dbgtext( "%c", pace
->perms
& S_IWUSR
? 'w' : '-');
582 dbgtext( "%c\n", pace
->perms
& S_IXUSR
? 'x' : '-');
585 /****************************************************************************
586 Print out a canon ace list.
587 ****************************************************************************/
589 static void print_canon_ace_list(const char *name
, canon_ace
*ace_list
)
593 if( DEBUGLVL( 10 )) {
594 dbgtext( "print_canon_ace_list: %s\n", name
);
595 for (;ace_list
; ace_list
= ace_list
->next
, count
++)
596 print_canon_ace(ace_list
, count
);
600 /****************************************************************************
601 Map POSIX ACL perms to canon_ace permissions (a mode_t containing only S_(R|W|X)USR bits).
602 ****************************************************************************/
604 static mode_t
convert_permset_to_mode_t(connection_struct
*conn
, SMB_ACL_PERMSET_T permset
)
608 ret
|= (SMB_VFS_SYS_ACL_GET_PERM(conn
, permset
, SMB_ACL_READ
) ? S_IRUSR
: 0);
609 ret
|= (SMB_VFS_SYS_ACL_GET_PERM(conn
, permset
, SMB_ACL_WRITE
) ? S_IWUSR
: 0);
610 ret
|= (SMB_VFS_SYS_ACL_GET_PERM(conn
, permset
, SMB_ACL_EXECUTE
) ? S_IXUSR
: 0);
615 /****************************************************************************
616 Map generic UNIX permissions to canon_ace permissions (a mode_t containing only S_(R|W|X)USR bits).
617 ****************************************************************************/
619 static mode_t
unix_perms_to_acl_perms(mode_t mode
, int r_mask
, int w_mask
, int x_mask
)
633 /****************************************************************************
634 Map canon_ace permissions (a mode_t containing only S_(R|W|X)USR bits) to
635 an SMB_ACL_PERMSET_T.
636 ****************************************************************************/
638 static int map_acl_perms_to_permset(connection_struct
*conn
, mode_t mode
, SMB_ACL_PERMSET_T
*p_permset
)
640 if (SMB_VFS_SYS_ACL_CLEAR_PERMS(conn
, *p_permset
) == -1)
642 if (mode
& S_IRUSR
) {
643 if (SMB_VFS_SYS_ACL_ADD_PERM(conn
, *p_permset
, SMB_ACL_READ
) == -1)
646 if (mode
& S_IWUSR
) {
647 if (SMB_VFS_SYS_ACL_ADD_PERM(conn
, *p_permset
, SMB_ACL_WRITE
) == -1)
650 if (mode
& S_IXUSR
) {
651 if (SMB_VFS_SYS_ACL_ADD_PERM(conn
, *p_permset
, SMB_ACL_EXECUTE
) == -1)
656 /****************************************************************************
657 Function to create owner and group SIDs from a SMB_STRUCT_STAT.
658 ****************************************************************************/
660 static void create_file_sids(SMB_STRUCT_STAT
*psbuf
, DOM_SID
*powner_sid
, DOM_SID
*pgroup_sid
)
662 uid_to_sid( powner_sid
, psbuf
->st_uid
);
663 gid_to_sid( pgroup_sid
, psbuf
->st_gid
);
666 /****************************************************************************
667 Merge aces with a common sid - if both are allow or deny, OR the permissions together and
668 delete the second one. If the first is deny, mask the permissions off and delete the allow
669 if the permissions become zero, delete the deny if the permissions are non zero.
670 ****************************************************************************/
672 static void merge_aces( canon_ace
**pp_list_head
)
674 canon_ace
*list_head
= *pp_list_head
;
675 canon_ace
*curr_ace_outer
;
676 canon_ace
*curr_ace_outer_next
;
679 * First, merge allow entries with identical SIDs, and deny entries
680 * with identical SIDs.
683 for (curr_ace_outer
= list_head
; curr_ace_outer
; curr_ace_outer
= curr_ace_outer_next
) {
685 canon_ace
*curr_ace_next
;
687 curr_ace_outer_next
= curr_ace_outer
->next
; /* Save the link in case we delete. */
689 for (curr_ace
= curr_ace_outer
->next
; curr_ace
; curr_ace
= curr_ace_next
) {
691 curr_ace_next
= curr_ace
->next
; /* Save the link in case of delete. */
693 if (sid_equal(&curr_ace
->trustee
, &curr_ace_outer
->trustee
) &&
694 (curr_ace
->attr
== curr_ace_outer
->attr
)) {
696 if( DEBUGLVL( 10 )) {
697 dbgtext("merge_aces: Merging ACE's\n");
698 print_canon_ace( curr_ace_outer
, 0);
699 print_canon_ace( curr_ace
, 0);
702 /* Merge two allow or two deny ACE's. */
704 curr_ace_outer
->perms
|= curr_ace
->perms
;
705 DLIST_REMOVE(list_head
, curr_ace
);
707 curr_ace_outer_next
= curr_ace_outer
->next
; /* We may have deleted the link. */
713 * Now go through and mask off allow permissions with deny permissions.
714 * We can delete either the allow or deny here as we know that each SID
715 * appears only once in the list.
718 for (curr_ace_outer
= list_head
; curr_ace_outer
; curr_ace_outer
= curr_ace_outer_next
) {
720 canon_ace
*curr_ace_next
;
722 curr_ace_outer_next
= curr_ace_outer
->next
; /* Save the link in case we delete. */
724 for (curr_ace
= curr_ace_outer
->next
; curr_ace
; curr_ace
= curr_ace_next
) {
726 curr_ace_next
= curr_ace
->next
; /* Save the link in case of delete. */
729 * Subtract ACE's with different entries. Due to the ordering constraints
730 * we've put on the ACL, we know the deny must be the first one.
733 if (sid_equal(&curr_ace
->trustee
, &curr_ace_outer
->trustee
) &&
734 (curr_ace_outer
->attr
== DENY_ACE
) && (curr_ace
->attr
== ALLOW_ACE
)) {
736 if( DEBUGLVL( 10 )) {
737 dbgtext("merge_aces: Masking ACE's\n");
738 print_canon_ace( curr_ace_outer
, 0);
739 print_canon_ace( curr_ace
, 0);
742 curr_ace
->perms
&= ~curr_ace_outer
->perms
;
744 if (curr_ace
->perms
== 0) {
747 * The deny overrides the allow. Remove the allow.
750 DLIST_REMOVE(list_head
, curr_ace
);
752 curr_ace_outer_next
= curr_ace_outer
->next
; /* We may have deleted the link. */
757 * Even after removing permissions, there
758 * are still allow permissions - delete the deny.
759 * It is safe to delete the deny here,
760 * as we are guarenteed by the deny first
761 * ordering that all the deny entries for
762 * this SID have already been merged into one
763 * before we can get to an allow ace.
766 DLIST_REMOVE(list_head
, curr_ace_outer
);
767 SAFE_FREE(curr_ace_outer
);
772 } /* end for curr_ace */
773 } /* end for curr_ace_outer */
775 /* We may have modified the list. */
777 *pp_list_head
= list_head
;
780 /****************************************************************************
781 Check if we need to return NT4.x compatible ACL entries.
782 ****************************************************************************/
784 static BOOL
nt4_compatible_acls(void)
786 const char *compat
= lp_acl_compatibility();
788 if (*compat
== '\0') {
789 enum remote_arch_types ra_type
= get_remote_arch();
791 /* Automatically adapt to client */
792 return (ra_type
<= RA_WINNT
);
794 return (strequal(compat
, "winnt"));
798 /****************************************************************************
799 Map canon_ace perms to permission bits NT.
800 The attr element is not used here - we only process deny entries on set,
801 not get. Deny entries are implicit on get with ace->perms = 0.
802 ****************************************************************************/
804 static SEC_ACCESS
map_canon_ace_perms(int snum
, int *pacl_type
, DOM_SID
*powner_sid
, canon_ace
*ace
, BOOL directory_ace
)
809 *pacl_type
= SEC_ACE_TYPE_ACCESS_ALLOWED
;
811 if (lp_acl_map_full_control(snum
) && ((ace
->perms
& ALL_ACE_PERMS
) == ALL_ACE_PERMS
)) {
813 nt_mask
= UNIX_DIRECTORY_ACCESS_RWX
;
815 nt_mask
= UNIX_ACCESS_RWX
;
817 } else if ((ace
->perms
& ALL_ACE_PERMS
) == (mode_t
)0) {
819 * Windows NT refuses to display ACEs with no permissions in them (but
820 * they are perfectly legal with Windows 2000). If the ACE has empty
821 * permissions we cannot use 0, so we use the otherwise unused
822 * WRITE_OWNER permission, which we ignore when we set an ACL.
823 * We abstract this into a #define of UNIX_ACCESS_NONE to allow this
824 * to be changed in the future.
827 if (nt4_compatible_acls())
828 nt_mask
= UNIX_ACCESS_NONE
;
833 nt_mask
|= ((ace
->perms
& S_IRUSR
) ? UNIX_DIRECTORY_ACCESS_R
: 0 );
834 nt_mask
|= ((ace
->perms
& S_IWUSR
) ? UNIX_DIRECTORY_ACCESS_W
: 0 );
835 nt_mask
|= ((ace
->perms
& S_IXUSR
) ? UNIX_DIRECTORY_ACCESS_X
: 0 );
837 nt_mask
|= ((ace
->perms
& S_IRUSR
) ? UNIX_ACCESS_R
: 0 );
838 nt_mask
|= ((ace
->perms
& S_IWUSR
) ? UNIX_ACCESS_W
: 0 );
839 nt_mask
|= ((ace
->perms
& S_IXUSR
) ? UNIX_ACCESS_X
: 0 );
843 DEBUG(10,("map_canon_ace_perms: Mapped (UNIX) %x to (NT) %x\n",
844 (unsigned int)ace
->perms
, (unsigned int)nt_mask
));
846 init_sec_access(&sa
,nt_mask
);
850 /****************************************************************************
851 Map NT perms to a UNIX mode_t.
852 ****************************************************************************/
854 #define FILE_SPECIFIC_READ_BITS (FILE_READ_DATA|FILE_READ_EA|FILE_READ_ATTRIBUTES)
855 #define FILE_SPECIFIC_WRITE_BITS (FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_WRITE_EA|FILE_WRITE_ATTRIBUTES)
856 #define FILE_SPECIFIC_EXECUTE_BITS (FILE_EXECUTE)
858 static mode_t
map_nt_perms( SEC_ACCESS sec_access
, int type
)
864 if(sec_access
.mask
& GENERIC_ALL_ACCESS
)
865 mode
= S_IRUSR
|S_IWUSR
|S_IXUSR
;
867 mode
|= (sec_access
.mask
& (GENERIC_READ_ACCESS
|FILE_SPECIFIC_READ_BITS
)) ? S_IRUSR
: 0;
868 mode
|= (sec_access
.mask
& (GENERIC_WRITE_ACCESS
|FILE_SPECIFIC_WRITE_BITS
)) ? S_IWUSR
: 0;
869 mode
|= (sec_access
.mask
& (GENERIC_EXECUTE_ACCESS
|FILE_SPECIFIC_EXECUTE_BITS
)) ? S_IXUSR
: 0;
873 if(sec_access
.mask
& GENERIC_ALL_ACCESS
)
874 mode
= S_IRGRP
|S_IWGRP
|S_IXGRP
;
876 mode
|= (sec_access
.mask
& (GENERIC_READ_ACCESS
|FILE_SPECIFIC_READ_BITS
)) ? S_IRGRP
: 0;
877 mode
|= (sec_access
.mask
& (GENERIC_WRITE_ACCESS
|FILE_SPECIFIC_WRITE_BITS
)) ? S_IWGRP
: 0;
878 mode
|= (sec_access
.mask
& (GENERIC_EXECUTE_ACCESS
|FILE_SPECIFIC_EXECUTE_BITS
)) ? S_IXGRP
: 0;
882 if(sec_access
.mask
& GENERIC_ALL_ACCESS
)
883 mode
= S_IROTH
|S_IWOTH
|S_IXOTH
;
885 mode
|= (sec_access
.mask
& (GENERIC_READ_ACCESS
|FILE_SPECIFIC_READ_BITS
)) ? S_IROTH
: 0;
886 mode
|= (sec_access
.mask
& (GENERIC_WRITE_ACCESS
|FILE_SPECIFIC_WRITE_BITS
)) ? S_IWOTH
: 0;
887 mode
|= (sec_access
.mask
& (GENERIC_EXECUTE_ACCESS
|FILE_SPECIFIC_EXECUTE_BITS
)) ? S_IXOTH
: 0;
895 /****************************************************************************
896 Unpack a SEC_DESC into a UNIX owner and group.
897 ****************************************************************************/
899 static BOOL
unpack_nt_owners(int snum
, SMB_STRUCT_STAT
*psbuf
, uid_t
*puser
, gid_t
*pgrp
, uint32 security_info_sent
, SEC_DESC
*psd
)
907 if(security_info_sent
== 0) {
908 DEBUG(0,("unpack_nt_owners: no security info sent !\n"));
913 * Validate the owner and group SID's.
916 memset(&owner_sid
, '\0', sizeof(owner_sid
));
917 memset(&grp_sid
, '\0', sizeof(grp_sid
));
919 DEBUG(5,("unpack_nt_owners: validating owner_sids.\n"));
922 * Don't immediately fail if the owner sid cannot be validated.
923 * This may be a group chown only set.
926 if (security_info_sent
& OWNER_SECURITY_INFORMATION
) {
927 sid_copy(&owner_sid
, psd
->owner_sid
);
928 if (!NT_STATUS_IS_OK(sid_to_uid(&owner_sid
, puser
))) {
929 if (lp_force_unknown_acl_user(snum
)) {
930 /* this allows take ownership to work
932 *puser
= current_user
.uid
;
934 DEBUG(3,("unpack_nt_owners: unable to validate"
935 " owner sid for %s\n",
936 sid_string_static(&owner_sid
)));
943 * Don't immediately fail if the group sid cannot be validated.
944 * This may be an owner chown only set.
947 if (security_info_sent
& GROUP_SECURITY_INFORMATION
) {
948 sid_copy(&grp_sid
, psd
->grp_sid
);
949 if (!NT_STATUS_IS_OK(sid_to_gid( &grp_sid
, pgrp
))) {
950 if (lp_force_unknown_acl_user(snum
)) {
951 /* this allows take group ownership to work
953 *pgrp
= current_user
.gid
;
955 DEBUG(3,("unpack_nt_owners: unable to validate"
962 DEBUG(5,("unpack_nt_owners: owner_sids validated.\n"));
967 /****************************************************************************
968 Ensure the enforced permissions for this share apply.
969 ****************************************************************************/
971 static void apply_default_perms(files_struct
*fsp
, canon_ace
*pace
, mode_t type
)
973 int snum
= SNUM(fsp
->conn
);
974 mode_t and_bits
= (mode_t
)0;
975 mode_t or_bits
= (mode_t
)0;
977 /* Get the initial bits to apply. */
979 if (fsp
->is_directory
) {
980 and_bits
= lp_dir_security_mask(snum
);
981 or_bits
= lp_force_dir_security_mode(snum
);
983 and_bits
= lp_security_mask(snum
);
984 or_bits
= lp_force_security_mode(snum
);
987 /* Now bounce them into the S_USR space. */
990 /* Ensure owner has read access. */
991 pace
->perms
|= S_IRUSR
;
992 if (fsp
->is_directory
)
993 pace
->perms
|= (S_IWUSR
|S_IXUSR
);
994 and_bits
= unix_perms_to_acl_perms(and_bits
, S_IRUSR
, S_IWUSR
, S_IXUSR
);
995 or_bits
= unix_perms_to_acl_perms(or_bits
, S_IRUSR
, S_IWUSR
, S_IXUSR
);
998 and_bits
= unix_perms_to_acl_perms(and_bits
, S_IRGRP
, S_IWGRP
, S_IXGRP
);
999 or_bits
= unix_perms_to_acl_perms(or_bits
, S_IRGRP
, S_IWGRP
, S_IXGRP
);
1002 and_bits
= unix_perms_to_acl_perms(and_bits
, S_IROTH
, S_IWOTH
, S_IXOTH
);
1003 or_bits
= unix_perms_to_acl_perms(or_bits
, S_IROTH
, S_IWOTH
, S_IXOTH
);
1007 pace
->perms
= ((pace
->perms
& and_bits
)|or_bits
);
1010 /****************************************************************************
1011 Check if a given uid/SID is in a group gid/SID. This is probably very
1012 expensive and will need optimisation. A *lot* of optimisation :-). JRA.
1013 ****************************************************************************/
1015 static BOOL
uid_entry_in_group( canon_ace
*uid_ace
, canon_ace
*group_ace
)
1020 /* "Everyone" always matches every uid. */
1022 if (sid_equal(&group_ace
->trustee
, &global_sid_World
))
1025 /* Assume that the current user is in the current group (force group) */
1027 if (uid_ace
->unix_ug
.uid
== current_user
.uid
&& group_ace
->unix_ug
.gid
== current_user
.gid
)
1030 fstrcpy(u_name
, uidtoname(uid_ace
->unix_ug
.uid
));
1031 fstrcpy(g_name
, gidtoname(group_ace
->unix_ug
.gid
));
1034 * Due to the winbind interfaces we need to do this via names,
1038 return user_in_group_list(u_name
, g_name
, NULL
, 0);
1041 /****************************************************************************
1042 A well formed POSIX file or default ACL has at least 3 entries, a
1043 SMB_ACL_USER_OBJ, SMB_ACL_GROUP_OBJ, SMB_ACL_OTHER_OBJ.
1044 In addition, the owner must always have at least read access.
1045 When using this call on get_acl, the pst struct is valid and contains
1046 the mode of the file. When using this call on set_acl, the pst struct has
1047 been modified to have a mode containing the default for this file or directory
1049 ****************************************************************************/
1051 static BOOL
ensure_canon_entry_valid(canon_ace
**pp_ace
,
1053 const DOM_SID
*pfile_owner_sid
,
1054 const DOM_SID
*pfile_grp_sid
,
1055 SMB_STRUCT_STAT
*pst
,
1059 BOOL got_user
= False
;
1060 BOOL got_grp
= False
;
1061 BOOL got_other
= False
;
1062 canon_ace
*pace_other
= NULL
;
1064 for (pace
= *pp_ace
; pace
; pace
= pace
->next
) {
1065 if (pace
->type
== SMB_ACL_USER_OBJ
) {
1068 apply_default_perms(fsp
, pace
, S_IRUSR
);
1071 } else if (pace
->type
== SMB_ACL_GROUP_OBJ
) {
1074 * Ensure create mask/force create mode is respected on set.
1078 apply_default_perms(fsp
, pace
, S_IRGRP
);
1081 } else if (pace
->type
== SMB_ACL_OTHER
) {
1084 * Ensure create mask/force create mode is respected on set.
1088 apply_default_perms(fsp
, pace
, S_IROTH
);
1095 if ((pace
= SMB_MALLOC_P(canon_ace
)) == NULL
) {
1096 DEBUG(0,("ensure_canon_entry_valid: malloc fail.\n"));
1101 pace
->type
= SMB_ACL_USER_OBJ
;
1102 pace
->owner_type
= UID_ACE
;
1103 pace
->unix_ug
.uid
= pst
->st_uid
;
1104 pace
->trustee
= *pfile_owner_sid
;
1105 pace
->attr
= ALLOW_ACE
;
1108 /* See if the owning user is in any of the other groups in
1109 the ACE. If so, OR in the permissions from that group. */
1111 BOOL group_matched
= False
;
1112 canon_ace
*pace_iter
;
1114 for (pace_iter
= *pp_ace
; pace_iter
; pace_iter
= pace_iter
->next
) {
1115 if (pace_iter
->type
== SMB_ACL_GROUP_OBJ
|| pace_iter
->type
== SMB_ACL_GROUP
) {
1116 if (uid_entry_in_group(pace
, pace_iter
)) {
1117 pace
->perms
|= pace_iter
->perms
;
1118 group_matched
= True
;
1123 /* If we only got an "everyone" perm, just use that. */
1124 if (!group_matched
) {
1126 pace
->perms
= pace_other
->perms
;
1131 apply_default_perms(fsp
, pace
, S_IRUSR
);
1133 pace
->perms
= unix_perms_to_acl_perms(pst
->st_mode
, S_IRUSR
, S_IWUSR
, S_IXUSR
);
1136 DLIST_ADD(*pp_ace
, pace
);
1140 if ((pace
= SMB_MALLOC_P(canon_ace
)) == NULL
) {
1141 DEBUG(0,("ensure_canon_entry_valid: malloc fail.\n"));
1146 pace
->type
= SMB_ACL_GROUP_OBJ
;
1147 pace
->owner_type
= GID_ACE
;
1148 pace
->unix_ug
.uid
= pst
->st_gid
;
1149 pace
->trustee
= *pfile_grp_sid
;
1150 pace
->attr
= ALLOW_ACE
;
1152 /* If we only got an "everyone" perm, just use that. */
1154 pace
->perms
= pace_other
->perms
;
1157 apply_default_perms(fsp
, pace
, S_IRGRP
);
1159 pace
->perms
= unix_perms_to_acl_perms(pst
->st_mode
, S_IRGRP
, S_IWGRP
, S_IXGRP
);
1162 DLIST_ADD(*pp_ace
, pace
);
1166 if ((pace
= SMB_MALLOC_P(canon_ace
)) == NULL
) {
1167 DEBUG(0,("ensure_canon_entry_valid: malloc fail.\n"));
1172 pace
->type
= SMB_ACL_OTHER
;
1173 pace
->owner_type
= WORLD_ACE
;
1174 pace
->unix_ug
.world
= -1;
1175 pace
->trustee
= global_sid_World
;
1176 pace
->attr
= ALLOW_ACE
;
1179 apply_default_perms(fsp
, pace
, S_IROTH
);
1181 pace
->perms
= unix_perms_to_acl_perms(pst
->st_mode
, S_IROTH
, S_IWOTH
, S_IXOTH
);
1183 DLIST_ADD(*pp_ace
, pace
);
1189 /****************************************************************************
1190 Check if a POSIX ACL has the required SMB_ACL_USER_OBJ and SMB_ACL_GROUP_OBJ entries.
1191 If it does not have them, check if there are any entries where the trustee is the
1192 file owner or the owning group, and map these to SMB_ACL_USER_OBJ and SMB_ACL_GROUP_OBJ.
1193 ****************************************************************************/
1195 static void check_owning_objs(canon_ace
*ace
, DOM_SID
*pfile_owner_sid
, DOM_SID
*pfile_grp_sid
)
1197 BOOL got_user_obj
, got_group_obj
;
1198 canon_ace
*current_ace
;
1201 entries
= count_canon_ace_list(ace
);
1202 got_user_obj
= False
;
1203 got_group_obj
= False
;
1205 for (i
=0, current_ace
= ace
; i
< entries
; i
++, current_ace
= current_ace
->next
) {
1206 if (current_ace
->type
== SMB_ACL_USER_OBJ
)
1207 got_user_obj
= True
;
1208 else if (current_ace
->type
== SMB_ACL_GROUP_OBJ
)
1209 got_group_obj
= True
;
1211 if (got_user_obj
&& got_group_obj
) {
1212 DEBUG(10,("check_owning_objs: ACL had owning user/group entries.\n"));
1216 for (i
=0, current_ace
= ace
; i
< entries
; i
++, current_ace
= current_ace
->next
) {
1217 if (!got_user_obj
&& current_ace
->owner_type
== UID_ACE
&&
1218 sid_equal(¤t_ace
->trustee
, pfile_owner_sid
)) {
1219 current_ace
->type
= SMB_ACL_USER_OBJ
;
1220 got_user_obj
= True
;
1222 if (!got_group_obj
&& current_ace
->owner_type
== GID_ACE
&&
1223 sid_equal(¤t_ace
->trustee
, pfile_grp_sid
)) {
1224 current_ace
->type
= SMB_ACL_GROUP_OBJ
;
1225 got_group_obj
= True
;
1229 DEBUG(10,("check_owning_objs: ACL is missing an owner entry.\n"));
1231 DEBUG(10,("check_owning_objs: ACL is missing an owning group entry.\n"));
1234 /****************************************************************************
1235 Unpack a SEC_DESC into two canonical ace lists.
1236 ****************************************************************************/
1238 static BOOL
create_canon_ace_lists(files_struct
*fsp
, SMB_STRUCT_STAT
*pst
,
1239 DOM_SID
*pfile_owner_sid
,
1240 DOM_SID
*pfile_grp_sid
,
1241 canon_ace
**ppfile_ace
, canon_ace
**ppdir_ace
,
1244 BOOL all_aces_are_inherit_only
= (fsp
->is_directory
? True
: False
);
1245 canon_ace
*file_ace
= NULL
;
1246 canon_ace
*dir_ace
= NULL
;
1247 canon_ace
*tmp_ace
= NULL
;
1248 canon_ace
*current_ace
= NULL
;
1249 BOOL got_dir_allow
= False
;
1250 BOOL got_file_allow
= False
;
1257 * Convert the incoming ACL into a more regular form.
1260 for(i
= 0; i
< dacl
->num_aces
; i
++) {
1261 SEC_ACE
*psa
= &dacl
->ace
[i
];
1263 if((psa
->type
!= SEC_ACE_TYPE_ACCESS_ALLOWED
) && (psa
->type
!= SEC_ACE_TYPE_ACCESS_DENIED
)) {
1264 DEBUG(3,("create_canon_ace_lists: unable to set anything but an ALLOW or DENY ACE.\n"));
1268 if (nt4_compatible_acls()) {
1270 * The security mask may be UNIX_ACCESS_NONE which should map into
1271 * no permissions (we overload the WRITE_OWNER bit for this) or it
1272 * should be one of the ALL/EXECUTE/READ/WRITE bits. Arrange for this
1273 * to be so. Any other bits override the UNIX_ACCESS_NONE bit.
1277 * Convert GENERIC bits to specific bits.
1280 se_map_generic(&psa
->info
.mask
, &file_generic_mapping
);
1282 psa
->info
.mask
&= (UNIX_ACCESS_NONE
|FILE_ALL_ACCESS
);
1284 if(psa
->info
.mask
!= UNIX_ACCESS_NONE
)
1285 psa
->info
.mask
&= ~UNIX_ACCESS_NONE
;
1290 * Deal with the fact that NT 4.x re-writes the canonical format
1291 * that we return for default ACLs. If a directory ACE is identical
1292 * to a inherited directory ACE then NT changes the bits so that the
1293 * first ACE is set to OI|IO and the second ACE for this SID is set
1294 * to CI. We need to repair this. JRA.
1297 for(i
= 0; i
< dacl
->num_aces
; i
++) {
1298 SEC_ACE
*psa1
= &dacl
->ace
[i
];
1300 for (j
= i
+ 1; j
< dacl
->num_aces
; j
++) {
1301 SEC_ACE
*psa2
= &dacl
->ace
[j
];
1303 if (psa1
->info
.mask
!= psa2
->info
.mask
)
1306 if (!sid_equal(&psa1
->trustee
, &psa2
->trustee
))
1310 * Ok - permission bits and SIDs are equal.
1311 * Check if flags were re-written.
1314 if (psa1
->flags
& SEC_ACE_FLAG_INHERIT_ONLY
) {
1316 psa1
->flags
|= (psa2
->flags
& (SEC_ACE_FLAG_CONTAINER_INHERIT
|SEC_ACE_FLAG_OBJECT_INHERIT
));
1317 psa2
->flags
&= ~(SEC_ACE_FLAG_CONTAINER_INHERIT
|SEC_ACE_FLAG_OBJECT_INHERIT
);
1319 } else if (psa2
->flags
& SEC_ACE_FLAG_INHERIT_ONLY
) {
1321 psa2
->flags
|= (psa1
->flags
& (SEC_ACE_FLAG_CONTAINER_INHERIT
|SEC_ACE_FLAG_OBJECT_INHERIT
));
1322 psa1
->flags
&= ~(SEC_ACE_FLAG_CONTAINER_INHERIT
|SEC_ACE_FLAG_OBJECT_INHERIT
);
1328 for(i
= 0; i
< dacl
->num_aces
; i
++) {
1329 SEC_ACE
*psa
= &dacl
->ace
[i
];
1332 * Ignore non-mappable SIDs (NT Authority, BUILTIN etc).
1335 if (non_mappable_sid(&psa
->trustee
)) {
1337 DEBUG(10,("create_canon_ace_lists: ignoring non-mappable SID %s\n",
1338 sid_to_string(str
, &psa
->trustee
) ));
1343 * Create a cannon_ace entry representing this NT DACL ACE.
1346 if ((current_ace
= SMB_MALLOC_P(canon_ace
)) == NULL
) {
1347 free_canon_ace_list(file_ace
);
1348 free_canon_ace_list(dir_ace
);
1349 DEBUG(0,("create_canon_ace_lists: malloc fail.\n"));
1353 ZERO_STRUCTP(current_ace
);
1355 sid_copy(¤t_ace
->trustee
, &psa
->trustee
);
1358 * Try and work out if the SID is a user or group
1359 * as we need to flag these differently for POSIX.
1360 * Note what kind of a POSIX ACL this should map to.
1363 if( sid_equal(¤t_ace
->trustee
, &global_sid_World
)) {
1364 current_ace
->owner_type
= WORLD_ACE
;
1365 current_ace
->unix_ug
.world
= -1;
1366 current_ace
->type
= SMB_ACL_OTHER
;
1367 } else if (sid_equal(¤t_ace
->trustee
, &global_sid_Creator_Owner
)) {
1368 current_ace
->owner_type
= UID_ACE
;
1369 current_ace
->unix_ug
.uid
= pst
->st_uid
;
1370 current_ace
->type
= SMB_ACL_USER_OBJ
;
1373 * The Creator Owner entry only specifies inheritable permissions,
1374 * never access permissions. WinNT doesn't always set the ACE to
1375 *INHERIT_ONLY, though.
1378 if (nt4_compatible_acls())
1379 psa
->flags
|= SEC_ACE_FLAG_INHERIT_ONLY
;
1380 } else if (sid_equal(¤t_ace
->trustee
, &global_sid_Creator_Group
)) {
1381 current_ace
->owner_type
= GID_ACE
;
1382 current_ace
->unix_ug
.gid
= pst
->st_gid
;
1383 current_ace
->type
= SMB_ACL_GROUP_OBJ
;
1386 * The Creator Group entry only specifies inheritable permissions,
1387 * never access permissions. WinNT doesn't always set the ACE to
1388 *INHERIT_ONLY, though.
1390 if (nt4_compatible_acls())
1391 psa
->flags
|= SEC_ACE_FLAG_INHERIT_ONLY
;
1393 } else if (NT_STATUS_IS_OK(sid_to_uid( ¤t_ace
->trustee
, ¤t_ace
->unix_ug
.uid
))) {
1394 current_ace
->owner_type
= UID_ACE
;
1395 current_ace
->type
= SMB_ACL_USER
;
1396 } else if (NT_STATUS_IS_OK(sid_to_gid( ¤t_ace
->trustee
, ¤t_ace
->unix_ug
.gid
))) {
1397 current_ace
->owner_type
= GID_ACE
;
1398 current_ace
->type
= SMB_ACL_GROUP
;
1402 free_canon_ace_list(file_ace
);
1403 free_canon_ace_list(dir_ace
);
1404 DEBUG(0,("create_canon_ace_lists: unable to map SID %s to uid or gid.\n",
1405 sid_to_string(str
, ¤t_ace
->trustee
) ));
1406 SAFE_FREE(current_ace
);
1411 * Map the given NT permissions into a UNIX mode_t containing only
1412 * S_I(R|W|X)USR bits.
1415 current_ace
->perms
|= map_nt_perms( psa
->info
, S_IRUSR
);
1416 current_ace
->attr
= (psa
->type
== SEC_ACE_TYPE_ACCESS_ALLOWED
) ? ALLOW_ACE
: DENY_ACE
;
1417 current_ace
->inherited
= ((psa
->flags
& SEC_ACE_FLAG_INHERITED_ACE
) ? True
: False
);
1420 * Now add the created ace to either the file list, the directory
1421 * list, or both. We *MUST* preserve the order here (hence we use
1422 * DLIST_ADD_END) as NT ACLs are order dependent.
1425 if (fsp
->is_directory
) {
1428 * We can only add to the default POSIX ACE list if the ACE is
1429 * designed to be inherited by both files and directories.
1432 if ((psa
->flags
& (SEC_ACE_FLAG_OBJECT_INHERIT
|SEC_ACE_FLAG_CONTAINER_INHERIT
)) ==
1433 (SEC_ACE_FLAG_OBJECT_INHERIT
|SEC_ACE_FLAG_CONTAINER_INHERIT
)) {
1435 DLIST_ADD_END(dir_ace
, current_ace
, tmp_ace
);
1438 * Note if this was an allow ace. We can't process
1439 * any further deny ace's after this.
1442 if (current_ace
->attr
== ALLOW_ACE
)
1443 got_dir_allow
= True
;
1445 if ((current_ace
->attr
== DENY_ACE
) && got_dir_allow
) {
1446 DEBUG(0,("create_canon_ace_lists: malformed ACL in inheritable ACL ! \
1447 Deny entry after Allow entry. Failing to set on file %s.\n", fsp
->fsp_name
));
1448 free_canon_ace_list(file_ace
);
1449 free_canon_ace_list(dir_ace
);
1450 SAFE_FREE(current_ace
);
1454 if( DEBUGLVL( 10 )) {
1455 dbgtext("create_canon_ace_lists: adding dir ACL:\n");
1456 print_canon_ace( current_ace
, 0);
1460 * If this is not an inherit only ACE we need to add a duplicate
1464 if (!(psa
->flags
& SEC_ACE_FLAG_INHERIT_ONLY
)) {
1465 canon_ace
*dup_ace
= dup_canon_ace(current_ace
);
1468 DEBUG(0,("create_canon_ace_lists: malloc fail !\n"));
1469 free_canon_ace_list(file_ace
);
1470 free_canon_ace_list(dir_ace
);
1475 * We must not free current_ace here as its
1476 * pointer is now owned by the dir_ace list.
1478 current_ace
= dup_ace
;
1481 * We must not free current_ace here as its
1482 * pointer is now owned by the dir_ace list.
1490 * Only add to the file ACL if not inherit only.
1493 if (!(psa
->flags
& SEC_ACE_FLAG_INHERIT_ONLY
)) {
1494 DLIST_ADD_END(file_ace
, current_ace
, tmp_ace
);
1497 * Note if this was an allow ace. We can't process
1498 * any further deny ace's after this.
1501 if (current_ace
->attr
== ALLOW_ACE
)
1502 got_file_allow
= True
;
1504 if ((current_ace
->attr
== DENY_ACE
) && got_file_allow
) {
1505 DEBUG(0,("create_canon_ace_lists: malformed ACL in file ACL ! \
1506 Deny entry after Allow entry. Failing to set on file %s.\n", fsp
->fsp_name
));
1507 free_canon_ace_list(file_ace
);
1508 free_canon_ace_list(dir_ace
);
1509 SAFE_FREE(current_ace
);
1513 if( DEBUGLVL( 10 )) {
1514 dbgtext("create_canon_ace_lists: adding file ACL:\n");
1515 print_canon_ace( current_ace
, 0);
1517 all_aces_are_inherit_only
= False
;
1519 * We must not free current_ace here as its
1520 * pointer is now owned by the file_ace list.
1526 * Free if ACE was not added.
1529 SAFE_FREE(current_ace
);
1532 if (fsp
->is_directory
&& all_aces_are_inherit_only
) {
1534 * Windows 2000 is doing one of these weird 'inherit acl'
1535 * traverses to conserve NTFS ACL resources. Just pretend
1536 * there was no DACL sent. JRA.
1539 DEBUG(10,("create_canon_ace_lists: Win2k inherit acl traverse. Ignoring DACL.\n"));
1540 free_canon_ace_list(file_ace
);
1541 free_canon_ace_list(dir_ace
);
1546 * Check if we have SMB_ACL_USER_OBJ and SMB_ACL_GROUP_OBJ entries in each
1547 * ACL. If we don't have them, check if any SMB_ACL_USER/SMB_ACL_GROUP
1548 * entries can be converted to *_OBJ. Usually we will already have these
1549 * entries in the Default ACL, and the Access ACL will not have them.
1552 check_owning_objs(file_ace
, pfile_owner_sid
, pfile_grp_sid
);
1555 check_owning_objs(dir_ace
, pfile_owner_sid
, pfile_grp_sid
);
1559 *ppfile_ace
= file_ace
;
1560 *ppdir_ace
= dir_ace
;
1565 /****************************************************************************
1566 ASCII art time again... JRA :-).
1568 We have 4 cases to process when moving from an NT ACL to a POSIX ACL. Firstly,
1569 we insist the ACL is in canonical form (ie. all DENY entries preceede ALLOW
1570 entries). Secondly, the merge code has ensured that all duplicate SID entries for
1571 allow or deny have been merged, so the same SID can only appear once in the deny
1572 list or once in the allow list.
1574 We then process as follows :
1576 ---------------------------------------------------------------------------
1577 First pass - look for a Everyone DENY entry.
1579 If it is deny all (rwx) trunate the list at this point.
1580 Else, walk the list from this point and use the deny permissions of this
1581 entry as a mask on all following allow entries. Finally, delete
1582 the Everyone DENY entry (we have applied it to everything possible).
1584 In addition, in this pass we remove any DENY entries that have
1585 no permissions (ie. they are a DENY nothing).
1586 ---------------------------------------------------------------------------
1587 Second pass - only deal with deny user entries.
1589 DENY user1 (perms XXX)
1592 for all following allow group entries where user1 is in group
1593 new_perms |= group_perms;
1595 user1 entry perms = new_perms & ~ XXX;
1597 Convert the deny entry to an allow entry with the new perms and
1598 push to the end of the list. Note if the user was in no groups
1599 this maps to a specific allow nothing entry for this user.
1601 The common case from the NT ACL choser (userX deny all) is
1602 optimised so we don't do the group lookup - we just map to
1603 an allow nothing entry.
1605 What we're doing here is inferring the allow permissions the
1606 person setting the ACE on user1 wanted by looking at the allow
1607 permissions on the groups the user is currently in. This will
1608 be a snapshot, depending on group membership but is the best
1609 we can do and has the advantage of failing closed rather than
1611 ---------------------------------------------------------------------------
1612 Third pass - only deal with deny group entries.
1614 DENY group1 (perms XXX)
1616 for all following allow user entries where user is in group1
1617 user entry perms = user entry perms & ~ XXX;
1619 If there is a group Everyone allow entry with permissions YYY,
1620 convert the group1 entry to an allow entry and modify its
1623 new_perms = YYY & ~ XXX
1625 and push to the end of the list.
1627 If there is no group Everyone allow entry then convert the
1628 group1 entry to a allow nothing entry and push to the end of the list.
1630 Note that the common case from the NT ACL choser (groupX deny all)
1631 cannot be optimised here as we need to modify user entries who are
1632 in the group to change them to a deny all also.
1634 What we're doing here is modifying the allow permissions of
1635 user entries (which are more specific in POSIX ACLs) to mask
1636 out the explicit deny set on the group they are in. This will
1637 be a snapshot depending on current group membership but is the
1638 best we can do and has the advantage of failing closed rather
1640 ---------------------------------------------------------------------------
1641 Fourth pass - cope with cumulative permissions.
1643 for all allow user entries, if there exists an allow group entry with
1644 more permissive permissions, and the user is in that group, rewrite the
1645 allow user permissions to contain both sets of permissions.
1647 Currently the code for this is #ifdef'ed out as these semantics make
1648 no sense to me. JRA.
1649 ---------------------------------------------------------------------------
1651 Note we *MUST* do the deny user pass first as this will convert deny user
1652 entries into allow user entries which can then be processed by the deny
1655 The above algorithm took a *lot* of thinking about - hence this
1656 explaination :-). JRA.
1657 ****************************************************************************/
1659 /****************************************************************************
1660 Process a canon_ace list entries. This is very complex code. We need
1661 to go through and remove the "deny" permissions from any allow entry that matches
1662 the id of this entry. We have already refused any NT ACL that wasn't in correct
1663 order (DENY followed by ALLOW). If any allow entry ends up with zero permissions,
1664 we just remove it (to fail safe). We have already removed any duplicate ace
1665 entries. Treat an "Everyone" DENY_ACE as a special case - use it to mask all
1667 ****************************************************************************/
1669 static void process_deny_list( canon_ace
**pp_ace_list
)
1671 canon_ace
*ace_list
= *pp_ace_list
;
1672 canon_ace
*curr_ace
= NULL
;
1673 canon_ace
*curr_ace_next
= NULL
;
1675 /* Pass 1 above - look for an Everyone, deny entry. */
1677 for (curr_ace
= ace_list
; curr_ace
; curr_ace
= curr_ace_next
) {
1678 canon_ace
*allow_ace_p
;
1680 curr_ace_next
= curr_ace
->next
; /* So we can't lose the link. */
1682 if (curr_ace
->attr
!= DENY_ACE
)
1685 if (curr_ace
->perms
== (mode_t
)0) {
1687 /* Deny nothing entry - delete. */
1689 DLIST_REMOVE(ace_list
, curr_ace
);
1693 if (!sid_equal(&curr_ace
->trustee
, &global_sid_World
))
1696 /* JRATEST - assert. */
1697 SMB_ASSERT(curr_ace
->owner_type
== WORLD_ACE
);
1699 if (curr_ace
->perms
== ALL_ACE_PERMS
) {
1702 * Optimisation. This is a DENY_ALL to Everyone. Truncate the
1703 * list at this point including this entry.
1706 canon_ace
*prev_entry
= curr_ace
->prev
;
1708 free_canon_ace_list( curr_ace
);
1710 prev_entry
->next
= NULL
;
1712 /* We deleted the entire list. */
1718 for (allow_ace_p
= curr_ace
->next
; allow_ace_p
; allow_ace_p
= allow_ace_p
->next
) {
1721 * Only mask off allow entries.
1724 if (allow_ace_p
->attr
!= ALLOW_ACE
)
1727 allow_ace_p
->perms
&= ~curr_ace
->perms
;
1731 * Now it's been applied, remove it.
1734 DLIST_REMOVE(ace_list
, curr_ace
);
1737 /* Pass 2 above - deal with deny user entries. */
1739 for (curr_ace
= ace_list
; curr_ace
; curr_ace
= curr_ace_next
) {
1740 mode_t new_perms
= (mode_t
)0;
1741 canon_ace
*allow_ace_p
;
1744 curr_ace_next
= curr_ace
->next
; /* So we can't lose the link. */
1746 if (curr_ace
->attr
!= DENY_ACE
)
1749 if (curr_ace
->owner_type
!= UID_ACE
)
1752 if (curr_ace
->perms
== ALL_ACE_PERMS
) {
1755 * Optimisation - this is a deny everything to this user.
1756 * Convert to an allow nothing and push to the end of the list.
1759 curr_ace
->attr
= ALLOW_ACE
;
1760 curr_ace
->perms
= (mode_t
)0;
1761 DLIST_DEMOTE(ace_list
, curr_ace
, tmp_ace
);
1765 for (allow_ace_p
= curr_ace
->next
; allow_ace_p
; allow_ace_p
= allow_ace_p
->next
) {
1767 if (allow_ace_p
->attr
!= ALLOW_ACE
)
1770 /* We process GID_ACE and WORLD_ACE entries only. */
1772 if (allow_ace_p
->owner_type
== UID_ACE
)
1775 if (uid_entry_in_group( curr_ace
, allow_ace_p
))
1776 new_perms
|= allow_ace_p
->perms
;
1780 * Convert to a allow entry, modify the perms and push to the end
1784 curr_ace
->attr
= ALLOW_ACE
;
1785 curr_ace
->perms
= (new_perms
& ~curr_ace
->perms
);
1786 DLIST_DEMOTE(ace_list
, curr_ace
, tmp_ace
);
1789 /* Pass 3 above - deal with deny group entries. */
1791 for (curr_ace
= ace_list
; curr_ace
; curr_ace
= curr_ace_next
) {
1793 canon_ace
*allow_ace_p
;
1794 canon_ace
*allow_everyone_p
= NULL
;
1796 curr_ace_next
= curr_ace
->next
; /* So we can't lose the link. */
1798 if (curr_ace
->attr
!= DENY_ACE
)
1801 if (curr_ace
->owner_type
!= GID_ACE
)
1804 for (allow_ace_p
= curr_ace
->next
; allow_ace_p
; allow_ace_p
= allow_ace_p
->next
) {
1806 if (allow_ace_p
->attr
!= ALLOW_ACE
)
1809 /* Store a pointer to the Everyone allow, if it exists. */
1810 if (allow_ace_p
->owner_type
== WORLD_ACE
)
1811 allow_everyone_p
= allow_ace_p
;
1813 /* We process UID_ACE entries only. */
1815 if (allow_ace_p
->owner_type
!= UID_ACE
)
1818 /* Mask off the deny group perms. */
1820 if (uid_entry_in_group( allow_ace_p
, curr_ace
))
1821 allow_ace_p
->perms
&= ~curr_ace
->perms
;
1825 * Convert the deny to an allow with the correct perms and
1826 * push to the end of the list.
1829 curr_ace
->attr
= ALLOW_ACE
;
1830 if (allow_everyone_p
)
1831 curr_ace
->perms
= allow_everyone_p
->perms
& ~curr_ace
->perms
;
1833 curr_ace
->perms
= (mode_t
)0;
1834 DLIST_DEMOTE(ace_list
, curr_ace
, tmp_ace
);
1838 /* Doing this fourth pass allows Windows semantics to be layered
1839 * on top of POSIX semantics. I'm not sure if this is desirable.
1840 * For example, in W2K ACLs there is no way to say, "Group X no
1841 * access, user Y full access" if user Y is a member of group X.
1842 * This seems completely broken semantics to me.... JRA.
1846 /* Pass 4 above - deal with allow entries. */
1848 for (curr_ace
= ace_list
; curr_ace
; curr_ace
= curr_ace_next
) {
1849 canon_ace
*allow_ace_p
;
1851 curr_ace_next
= curr_ace
->next
; /* So we can't lose the link. */
1853 if (curr_ace
->attr
!= ALLOW_ACE
)
1856 if (curr_ace
->owner_type
!= UID_ACE
)
1859 for (allow_ace_p
= ace_list
; allow_ace_p
; allow_ace_p
= allow_ace_p
->next
) {
1861 if (allow_ace_p
->attr
!= ALLOW_ACE
)
1864 /* We process GID_ACE entries only. */
1866 if (allow_ace_p
->owner_type
!= GID_ACE
)
1869 /* OR in the group perms. */
1871 if (uid_entry_in_group( curr_ace
, allow_ace_p
))
1872 curr_ace
->perms
|= allow_ace_p
->perms
;
1877 *pp_ace_list
= ace_list
;
1880 /****************************************************************************
1881 Create a default mode that will be used if a security descriptor entry has
1882 no user/group/world entries.
1883 ****************************************************************************/
1885 static mode_t
create_default_mode(files_struct
*fsp
, BOOL interitable_mode
)
1887 int snum
= SNUM(fsp
->conn
);
1888 mode_t and_bits
= (mode_t
)0;
1889 mode_t or_bits
= (mode_t
)0;
1890 mode_t mode
= interitable_mode
? unix_mode( fsp
->conn
, FILE_ATTRIBUTE_ARCHIVE
, fsp
->fsp_name
, False
) : S_IRUSR
;
1892 if (fsp
->is_directory
)
1893 mode
|= (S_IWUSR
|S_IXUSR
);
1896 * Now AND with the create mode/directory mode bits then OR with the
1897 * force create mode/force directory mode bits.
1900 if (fsp
->is_directory
) {
1901 and_bits
= lp_dir_security_mask(snum
);
1902 or_bits
= lp_force_dir_security_mode(snum
);
1904 and_bits
= lp_security_mask(snum
);
1905 or_bits
= lp_force_security_mode(snum
);
1908 return ((mode
& and_bits
)|or_bits
);
1911 /****************************************************************************
1912 Unpack a SEC_DESC into two canonical ace lists. We don't depend on this
1914 ****************************************************************************/
1916 static BOOL
unpack_canon_ace(files_struct
*fsp
,
1917 SMB_STRUCT_STAT
*pst
,
1918 DOM_SID
*pfile_owner_sid
,
1919 DOM_SID
*pfile_grp_sid
,
1920 canon_ace
**ppfile_ace
, canon_ace
**ppdir_ace
,
1921 uint32 security_info_sent
, SEC_DESC
*psd
)
1923 canon_ace
*file_ace
= NULL
;
1924 canon_ace
*dir_ace
= NULL
;
1929 if(security_info_sent
== 0) {
1930 DEBUG(0,("unpack_canon_ace: no security info sent !\n"));
1935 * If no DACL then this is a chown only security descriptor.
1938 if(!(security_info_sent
& DACL_SECURITY_INFORMATION
) || !psd
->dacl
)
1942 * Now go through the DACL and create the canon_ace lists.
1945 if (!create_canon_ace_lists( fsp
, pst
, pfile_owner_sid
, pfile_grp_sid
,
1946 &file_ace
, &dir_ace
, psd
->dacl
))
1949 if ((file_ace
== NULL
) && (dir_ace
== NULL
)) {
1950 /* W2K traverse DACL set - ignore. */
1955 * Go through the canon_ace list and merge entries
1956 * belonging to identical users of identical allow or deny type.
1957 * We can do this as all deny entries come first, followed by
1958 * all allow entries (we have mandated this before accepting this acl).
1961 print_canon_ace_list( "file ace - before merge", file_ace
);
1962 merge_aces( &file_ace
);
1964 print_canon_ace_list( "dir ace - before merge", dir_ace
);
1965 merge_aces( &dir_ace
);
1968 * NT ACLs are order dependent. Go through the acl lists and
1969 * process DENY entries by masking the allow entries.
1972 print_canon_ace_list( "file ace - before deny", file_ace
);
1973 process_deny_list( &file_ace
);
1975 print_canon_ace_list( "dir ace - before deny", dir_ace
);
1976 process_deny_list( &dir_ace
);
1979 * A well formed POSIX file or default ACL has at least 3 entries, a
1980 * SMB_ACL_USER_OBJ, SMB_ACL_GROUP_OBJ, SMB_ACL_OTHER_OBJ
1981 * and optionally a mask entry. Ensure this is the case.
1984 print_canon_ace_list( "file ace - before valid", file_ace
);
1987 * A default 3 element mode entry for a file should be r-- --- ---.
1988 * A default 3 element mode entry for a directory should be rwx --- ---.
1991 pst
->st_mode
= create_default_mode(fsp
, False
);
1993 if (!ensure_canon_entry_valid(&file_ace
, fsp
, pfile_owner_sid
, pfile_grp_sid
, pst
, True
)) {
1994 free_canon_ace_list(file_ace
);
1995 free_canon_ace_list(dir_ace
);
1999 print_canon_ace_list( "dir ace - before valid", dir_ace
);
2002 * A default inheritable 3 element mode entry for a directory should be the
2003 * mode Samba will use to create a file within. Ensure user rwx bits are set if
2007 pst
->st_mode
= create_default_mode(fsp
, True
);
2009 if (dir_ace
&& !ensure_canon_entry_valid(&dir_ace
, fsp
, pfile_owner_sid
, pfile_grp_sid
, pst
, True
)) {
2010 free_canon_ace_list(file_ace
);
2011 free_canon_ace_list(dir_ace
);
2015 print_canon_ace_list( "file ace - return", file_ace
);
2016 print_canon_ace_list( "dir ace - return", dir_ace
);
2018 *ppfile_ace
= file_ace
;
2019 *ppdir_ace
= dir_ace
;
2024 /******************************************************************************
2025 When returning permissions, try and fit NT display
2026 semantics if possible. Note the the canon_entries here must have been malloced.
2027 The list format should be - first entry = owner, followed by group and other user
2028 entries, last entry = other.
2030 Note that this doesn't exactly match the NT semantics for an ACL. As POSIX entries
2031 are not ordered, and match on the most specific entry rather than walking a list,
2032 then a simple POSIX permission of rw-r--r-- should really map to 5 entries,
2034 Entry 0: owner : deny all except read and write.
2035 Entry 1: owner : allow read and write.
2036 Entry 2: group : deny all except read.
2037 Entry 3: group : allow read.
2038 Entry 4: Everyone : allow read.
2040 But NT cannot display this in their ACL editor !
2041 ********************************************************************************/
2043 static void arrange_posix_perms( char *filename
, canon_ace
**pp_list_head
)
2045 canon_ace
*list_head
= *pp_list_head
;
2046 canon_ace
*owner_ace
= NULL
;
2047 canon_ace
*other_ace
= NULL
;
2048 canon_ace
*ace
= NULL
;
2050 for (ace
= list_head
; ace
; ace
= ace
->next
) {
2051 if (ace
->type
== SMB_ACL_USER_OBJ
)
2053 else if (ace
->type
== SMB_ACL_OTHER
) {
2054 /* Last ace - this is "other" */
2059 if (!owner_ace
|| !other_ace
) {
2060 DEBUG(0,("arrange_posix_perms: Invalid POSIX permissions for file %s, missing owner or other.\n",
2066 * The POSIX algorithm applies to owner first, and other last,
2067 * so ensure they are arranged in this order.
2071 DLIST_PROMOTE(list_head
, owner_ace
);
2075 DLIST_DEMOTE(list_head
, other_ace
, ace
);
2078 /* We have probably changed the head of the list. */
2080 *pp_list_head
= list_head
;
2083 /****************************************************************************
2084 Create a linked list of canonical ACE entries.
2085 ****************************************************************************/
2087 static canon_ace
*canonicalise_acl( files_struct
*fsp
, SMB_ACL_T posix_acl
, SMB_STRUCT_STAT
*psbuf
,
2088 const DOM_SID
*powner
, const DOM_SID
*pgroup
, struct pai_val
*pal
, SMB_ACL_TYPE_T the_acl_type
)
2090 connection_struct
*conn
= fsp
->conn
;
2091 mode_t acl_mask
= (S_IRUSR
|S_IWUSR
|S_IXUSR
);
2092 canon_ace
*list_head
= NULL
;
2093 canon_ace
*ace
= NULL
;
2094 canon_ace
*next_ace
= NULL
;
2095 int entry_id
= SMB_ACL_FIRST_ENTRY
;
2096 SMB_ACL_ENTRY_T entry
;
2099 while ( posix_acl
&& (SMB_VFS_SYS_ACL_GET_ENTRY(conn
, posix_acl
, entry_id
, &entry
) == 1)) {
2100 SMB_ACL_TAG_T tagtype
;
2101 SMB_ACL_PERMSET_T permset
;
2104 enum ace_owner owner_type
;
2107 if (entry_id
== SMB_ACL_FIRST_ENTRY
)
2108 entry_id
= SMB_ACL_NEXT_ENTRY
;
2110 /* Is this a MASK entry ? */
2111 if (SMB_VFS_SYS_ACL_GET_TAG_TYPE(conn
, entry
, &tagtype
) == -1)
2114 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn
, entry
, &permset
) == -1)
2117 /* Decide which SID to use based on the ACL type. */
2119 case SMB_ACL_USER_OBJ
:
2120 /* Get the SID from the owner. */
2121 sid_copy(&sid
, powner
);
2122 unix_ug
.uid
= psbuf
->st_uid
;
2123 owner_type
= UID_ACE
;
2127 uid_t
*puid
= (uid_t
*)SMB_VFS_SYS_ACL_GET_QUALIFIER(conn
, entry
);
2129 DEBUG(0,("canonicalise_acl: Failed to get uid.\n"));
2133 * A SMB_ACL_USER entry for the owner is shadowed by the
2134 * SMB_ACL_USER_OBJ entry and Windows also cannot represent
2135 * that entry, so we ignore it. We also don't create such
2136 * entries out of the blue when setting ACLs, so a get/set
2137 * cycle will drop them.
2139 if (the_acl_type
== SMB_ACL_TYPE_ACCESS
&& *puid
== psbuf
->st_uid
) {
2140 SMB_VFS_SYS_ACL_FREE_QUALIFIER(conn
, (void *)puid
,tagtype
);
2143 uid_to_sid( &sid
, *puid
);
2144 unix_ug
.uid
= *puid
;
2145 owner_type
= UID_ACE
;
2146 SMB_VFS_SYS_ACL_FREE_QUALIFIER(conn
, (void *)puid
,tagtype
);
2149 case SMB_ACL_GROUP_OBJ
:
2150 /* Get the SID from the owning group. */
2151 sid_copy(&sid
, pgroup
);
2152 unix_ug
.gid
= psbuf
->st_gid
;
2153 owner_type
= GID_ACE
;
2157 gid_t
*pgid
= (gid_t
*)SMB_VFS_SYS_ACL_GET_QUALIFIER(conn
, entry
);
2159 DEBUG(0,("canonicalise_acl: Failed to get gid.\n"));
2162 gid_to_sid( &sid
, *pgid
);
2163 unix_ug
.gid
= *pgid
;
2164 owner_type
= GID_ACE
;
2165 SMB_VFS_SYS_ACL_FREE_QUALIFIER(conn
, (void *)pgid
,tagtype
);
2169 acl_mask
= convert_permset_to_mode_t(conn
, permset
);
2170 continue; /* Don't count the mask as an entry. */
2172 /* Use the Everyone SID */
2173 sid
= global_sid_World
;
2175 owner_type
= WORLD_ACE
;
2178 DEBUG(0,("canonicalise_acl: Unknown tagtype %u\n", (unsigned int)tagtype
));
2183 * Add this entry to the list.
2186 if ((ace
= SMB_MALLOC_P(canon_ace
)) == NULL
)
2190 ace
->type
= tagtype
;
2191 ace
->perms
= convert_permset_to_mode_t(conn
, permset
);
2192 ace
->attr
= ALLOW_ACE
;
2194 ace
->unix_ug
= unix_ug
;
2195 ace
->owner_type
= owner_type
;
2196 ace
->inherited
= get_inherited_flag(pal
, ace
, (the_acl_type
== SMB_ACL_TYPE_DEFAULT
));
2198 DLIST_ADD(list_head
, ace
);
2202 * This next call will ensure we have at least a user/group/world set.
2205 if (!ensure_canon_entry_valid(&list_head
, fsp
, powner
, pgroup
, psbuf
, False
))
2209 * Now go through the list, masking the permissions with the
2210 * acl_mask. Ensure all DENY Entries are at the start of the list.
2213 DEBUG(10,("canonicalise_acl: %s ace entries before arrange :\n", the_acl_type
== SMB_ACL_TYPE_ACCESS
? "Access" : "Default" ));
2215 for ( ace_count
= 0, ace
= list_head
; ace
; ace
= next_ace
, ace_count
++) {
2216 next_ace
= ace
->next
;
2218 /* Masks are only applied to entries other than USER_OBJ and OTHER. */
2219 if (ace
->type
!= SMB_ACL_OTHER
&& ace
->type
!= SMB_ACL_USER_OBJ
)
2220 ace
->perms
&= acl_mask
;
2222 if (ace
->perms
== 0) {
2223 DLIST_PROMOTE(list_head
, ace
);
2226 if( DEBUGLVL( 10 ) ) {
2227 print_canon_ace(ace
, ace_count
);
2231 arrange_posix_perms(fsp
->fsp_name
,&list_head
);
2233 print_canon_ace_list( "canonicalise_acl: ace entries after arrange", list_head
);
2239 free_canon_ace_list(list_head
);
2243 /****************************************************************************
2244 Check if the current user group list contains a given group.
2245 ****************************************************************************/
2247 static BOOL
current_user_in_group(gid_t gid
)
2251 for (i
= 0; i
< current_user
.ngroups
; i
++) {
2252 if (current_user
.groups
[i
] == gid
) {
2260 /****************************************************************************
2261 Should we override a deny ?
2262 ****************************************************************************/
2264 static BOOL
acl_group_override(connection_struct
*conn
, gid_t prim_gid
)
2266 if ((errno
== EACCES
|| errno
== EPERM
) &&
2267 lp_acl_group_control(SNUM(conn
)) &&
2268 current_user_in_group(prim_gid
)) {
2275 /****************************************************************************
2276 Attempt to apply an ACL to a file or directory.
2277 ****************************************************************************/
2279 static BOOL
set_canon_ace_list(files_struct
*fsp
, canon_ace
*the_ace
, BOOL default_ace
, gid_t prim_gid
, BOOL
*pacl_set_support
)
2281 connection_struct
*conn
= fsp
->conn
;
2283 SMB_ACL_T the_acl
= SMB_VFS_SYS_ACL_INIT(conn
, (int)count_canon_ace_list(the_ace
) + 1);
2286 SMB_ACL_ENTRY_T mask_entry
;
2287 BOOL got_mask_entry
= False
;
2288 SMB_ACL_PERMSET_T mask_permset
;
2289 SMB_ACL_TYPE_T the_acl_type
= (default_ace
? SMB_ACL_TYPE_DEFAULT
: SMB_ACL_TYPE_ACCESS
);
2290 BOOL needs_mask
= False
;
2291 mode_t mask_perms
= 0;
2293 #if defined(POSIX_ACL_NEEDS_MASK)
2294 /* HP-UX always wants to have a mask (called "class" there). */
2298 if (the_acl
== NULL
) {
2300 if (!no_acl_syscall_error(errno
)) {
2302 * Only print this error message if we have some kind of ACL
2303 * support that's not working. Otherwise we would always get this.
2305 DEBUG(0,("set_canon_ace_list: Unable to init %s ACL. (%s)\n",
2306 default_ace
? "default" : "file", strerror(errno
) ));
2308 *pacl_set_support
= False
;
2312 if( DEBUGLVL( 10 )) {
2313 dbgtext("set_canon_ace_list: setting ACL:\n");
2314 for (i
= 0, p_ace
= the_ace
; p_ace
; p_ace
= p_ace
->next
, i
++ ) {
2315 print_canon_ace( p_ace
, i
);
2319 for (i
= 0, p_ace
= the_ace
; p_ace
; p_ace
= p_ace
->next
, i
++ ) {
2320 SMB_ACL_ENTRY_T the_entry
;
2321 SMB_ACL_PERMSET_T the_permset
;
2324 * ACLs only "need" an ACL_MASK entry if there are any named user or
2325 * named group entries. But if there is an ACL_MASK entry, it applies
2326 * to ACL_USER, ACL_GROUP, and ACL_GROUP_OBJ entries. Set the mask
2327 * so that it doesn't deny (i.e., mask off) any permissions.
2330 if (p_ace
->type
== SMB_ACL_USER
|| p_ace
->type
== SMB_ACL_GROUP
) {
2332 mask_perms
|= p_ace
->perms
;
2333 } else if (p_ace
->type
== SMB_ACL_GROUP_OBJ
) {
2334 mask_perms
|= p_ace
->perms
;
2338 * Get the entry for this ACE.
2341 if (SMB_VFS_SYS_ACL_CREATE_ENTRY(conn
, &the_acl
, &the_entry
) == -1) {
2342 DEBUG(0,("set_canon_ace_list: Failed to create entry %d. (%s)\n",
2343 i
, strerror(errno
) ));
2347 if (p_ace
->type
== SMB_ACL_MASK
) {
2348 mask_entry
= the_entry
;
2349 got_mask_entry
= True
;
2353 * Ok - we now know the ACL calls should be working, don't
2354 * allow fallback to chmod.
2357 *pacl_set_support
= True
;
2360 * Initialise the entry from the canon_ace.
2364 * First tell the entry what type of ACE this is.
2367 if (SMB_VFS_SYS_ACL_SET_TAG_TYPE(conn
, the_entry
, p_ace
->type
) == -1) {
2368 DEBUG(0,("set_canon_ace_list: Failed to set tag type on entry %d. (%s)\n",
2369 i
, strerror(errno
) ));
2374 * Only set the qualifier (user or group id) if the entry is a user
2378 if ((p_ace
->type
== SMB_ACL_USER
) || (p_ace
->type
== SMB_ACL_GROUP
)) {
2379 if (SMB_VFS_SYS_ACL_SET_QUALIFIER(conn
, the_entry
,(void *)&p_ace
->unix_ug
.uid
) == -1) {
2380 DEBUG(0,("set_canon_ace_list: Failed to set qualifier on entry %d. (%s)\n",
2381 i
, strerror(errno
) ));
2387 * Convert the mode_t perms in the canon_ace to a POSIX permset.
2390 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn
, the_entry
, &the_permset
) == -1) {
2391 DEBUG(0,("set_canon_ace_list: Failed to get permset on entry %d. (%s)\n",
2392 i
, strerror(errno
) ));
2396 if (map_acl_perms_to_permset(conn
, p_ace
->perms
, &the_permset
) == -1) {
2397 DEBUG(0,("set_canon_ace_list: Failed to create permset for mode (%u) on entry %d. (%s)\n",
2398 (unsigned int)p_ace
->perms
, i
, strerror(errno
) ));
2403 * ..and apply them to the entry.
2406 if (SMB_VFS_SYS_ACL_SET_PERMSET(conn
, the_entry
, the_permset
) == -1) {
2407 DEBUG(0,("set_canon_ace_list: Failed to add permset on entry %d. (%s)\n",
2408 i
, strerror(errno
) ));
2413 print_canon_ace( p_ace
, i
);
2417 if (needs_mask
&& !got_mask_entry
) {
2418 if (SMB_VFS_SYS_ACL_CREATE_ENTRY(conn
, &the_acl
, &mask_entry
) == -1) {
2419 DEBUG(0,("set_canon_ace_list: Failed to create mask entry. (%s)\n", strerror(errno
) ));
2423 if (SMB_VFS_SYS_ACL_SET_TAG_TYPE(conn
, mask_entry
, SMB_ACL_MASK
) == -1) {
2424 DEBUG(0,("set_canon_ace_list: Failed to set tag type on mask entry. (%s)\n",strerror(errno
) ));
2428 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn
, mask_entry
, &mask_permset
) == -1) {
2429 DEBUG(0,("set_canon_ace_list: Failed to get mask permset. (%s)\n", strerror(errno
) ));
2433 if (map_acl_perms_to_permset(conn
, S_IRUSR
|S_IWUSR
|S_IXUSR
, &mask_permset
) == -1) {
2434 DEBUG(0,("set_canon_ace_list: Failed to create mask permset. (%s)\n", strerror(errno
) ));
2438 if (SMB_VFS_SYS_ACL_SET_PERMSET(conn
, mask_entry
, mask_permset
) == -1) {
2439 DEBUG(0,("set_canon_ace_list: Failed to add mask permset. (%s)\n", strerror(errno
) ));
2445 * Check if the ACL is valid.
2448 if (SMB_VFS_SYS_ACL_VALID(conn
, the_acl
) == -1) {
2449 DEBUG(0,("set_canon_ace_list: ACL type (%s) is invalid for set (%s).\n",
2450 the_acl_type
== SMB_ACL_TYPE_DEFAULT
? "directory default" : "file",
2456 * Finally apply it to the file or directory.
2459 if(default_ace
|| fsp
->is_directory
|| fsp
->fh
->fd
== -1) {
2460 if (SMB_VFS_SYS_ACL_SET_FILE(conn
, fsp
->fsp_name
, the_acl_type
, the_acl
) == -1) {
2462 * Some systems allow all the above calls and only fail with no ACL support
2463 * when attempting to apply the acl. HPUX with HFS is an example of this. JRA.
2465 if (no_acl_syscall_error(errno
)) {
2466 *pacl_set_support
= False
;
2469 if (acl_group_override(conn
, prim_gid
)) {
2472 DEBUG(5,("set_canon_ace_list: acl group control on and current user in file %s primary group.\n",
2476 sret
= SMB_VFS_SYS_ACL_SET_FILE(conn
, fsp
->fsp_name
, the_acl_type
, the_acl
);
2484 DEBUG(2,("set_canon_ace_list: sys_acl_set_file type %s failed for file %s (%s).\n",
2485 the_acl_type
== SMB_ACL_TYPE_DEFAULT
? "directory default" : "file",
2486 fsp
->fsp_name
, strerror(errno
) ));
2491 if (SMB_VFS_SYS_ACL_SET_FD(fsp
, fsp
->fh
->fd
, the_acl
) == -1) {
2493 * Some systems allow all the above calls and only fail with no ACL support
2494 * when attempting to apply the acl. HPUX with HFS is an example of this. JRA.
2496 if (no_acl_syscall_error(errno
)) {
2497 *pacl_set_support
= False
;
2500 if (acl_group_override(conn
, prim_gid
)) {
2503 DEBUG(5,("set_canon_ace_list: acl group control on and current user in file %s primary group.\n",
2507 sret
= SMB_VFS_SYS_ACL_SET_FD(fsp
, fsp
->fh
->fd
, the_acl
);
2515 DEBUG(2,("set_canon_ace_list: sys_acl_set_file failed for file %s (%s).\n",
2516 fsp
->fsp_name
, strerror(errno
) ));
2526 if (the_acl
!= NULL
) {
2527 SMB_VFS_SYS_ACL_FREE_ACL(conn
, the_acl
);
2533 /****************************************************************************
2534 Find a particular canon_ace entry.
2535 ****************************************************************************/
2537 static struct canon_ace
*canon_ace_entry_for(struct canon_ace
*list
, SMB_ACL_TAG_T type
, posix_id
*id
)
2540 if (list
->type
== type
&& ((type
!= SMB_ACL_USER
&& type
!= SMB_ACL_GROUP
) ||
2541 (type
== SMB_ACL_USER
&& id
&& id
->uid
== list
->unix_ug
.uid
) ||
2542 (type
== SMB_ACL_GROUP
&& id
&& id
->gid
== list
->unix_ug
.gid
)))
2549 /****************************************************************************
2551 ****************************************************************************/
2553 SMB_ACL_T
free_empty_sys_acl(connection_struct
*conn
, SMB_ACL_T the_acl
)
2555 SMB_ACL_ENTRY_T entry
;
2559 if (SMB_VFS_SYS_ACL_GET_ENTRY(conn
, the_acl
, SMB_ACL_FIRST_ENTRY
, &entry
) != 1) {
2560 SMB_VFS_SYS_ACL_FREE_ACL(conn
, the_acl
);
2566 /****************************************************************************
2567 Convert a canon_ace to a generic 3 element permission - if possible.
2568 ****************************************************************************/
2570 #define MAP_PERM(p,mask,result) (((p) & (mask)) ? (result) : 0 )
2572 static BOOL
convert_canon_ace_to_posix_perms( files_struct
*fsp
, canon_ace
*file_ace_list
, mode_t
*posix_perms
)
2574 int snum
= SNUM(fsp
->conn
);
2575 size_t ace_count
= count_canon_ace_list(file_ace_list
);
2577 canon_ace
*owner_ace
= NULL
;
2578 canon_ace
*group_ace
= NULL
;
2579 canon_ace
*other_ace
= NULL
;
2583 if (ace_count
!= 3) {
2584 DEBUG(3,("convert_canon_ace_to_posix_perms: Too many ACE entries for file %s to convert to \
2585 posix perms.\n", fsp
->fsp_name
));
2589 for (ace_p
= file_ace_list
; ace_p
; ace_p
= ace_p
->next
) {
2590 if (ace_p
->owner_type
== UID_ACE
)
2592 else if (ace_p
->owner_type
== GID_ACE
)
2594 else if (ace_p
->owner_type
== WORLD_ACE
)
2598 if (!owner_ace
|| !group_ace
|| !other_ace
) {
2599 DEBUG(3,("convert_canon_ace_to_posix_perms: Can't get standard entries for file %s.\n",
2604 *posix_perms
= (mode_t
)0;
2606 *posix_perms
|= owner_ace
->perms
;
2607 *posix_perms
|= MAP_PERM(group_ace
->perms
, S_IRUSR
, S_IRGRP
);
2608 *posix_perms
|= MAP_PERM(group_ace
->perms
, S_IWUSR
, S_IWGRP
);
2609 *posix_perms
|= MAP_PERM(group_ace
->perms
, S_IXUSR
, S_IXGRP
);
2610 *posix_perms
|= MAP_PERM(other_ace
->perms
, S_IRUSR
, S_IROTH
);
2611 *posix_perms
|= MAP_PERM(other_ace
->perms
, S_IWUSR
, S_IWOTH
);
2612 *posix_perms
|= MAP_PERM(other_ace
->perms
, S_IXUSR
, S_IXOTH
);
2614 /* The owner must have at least read access. */
2616 *posix_perms
|= S_IRUSR
;
2617 if (fsp
->is_directory
)
2618 *posix_perms
|= (S_IWUSR
|S_IXUSR
);
2620 /* If requested apply the masks. */
2622 /* Get the initial bits to apply. */
2624 if (fsp
->is_directory
) {
2625 and_bits
= lp_dir_security_mask(snum
);
2626 or_bits
= lp_force_dir_security_mode(snum
);
2628 and_bits
= lp_security_mask(snum
);
2629 or_bits
= lp_force_security_mode(snum
);
2632 *posix_perms
= (((*posix_perms
) & and_bits
)|or_bits
);
2634 DEBUG(10,("convert_canon_ace_to_posix_perms: converted u=%o,g=%o,w=%o to perm=0%o for file %s.\n",
2635 (int)owner_ace
->perms
, (int)group_ace
->perms
, (int)other_ace
->perms
, (int)*posix_perms
,
2641 /****************************************************************************
2642 Incoming NT ACLs on a directory can be split into a default POSIX acl (CI|OI|IO) and
2643 a normal POSIX acl. Win2k needs these split acls re-merging into one ACL
2644 with CI|OI set so it is inherited and also applies to the directory.
2645 Based on code from "Jim McDonough" <jmcd@us.ibm.com>.
2646 ****************************************************************************/
2648 static size_t merge_default_aces( SEC_ACE
*nt_ace_list
, size_t num_aces
)
2652 for (i
= 0; i
< num_aces
; i
++) {
2653 for (j
= i
+1; j
< num_aces
; j
++) {
2654 uint32 i_flags_ni
= (nt_ace_list
[i
].flags
& ~SEC_ACE_FLAG_INHERITED_ACE
);
2655 uint32 j_flags_ni
= (nt_ace_list
[j
].flags
& ~SEC_ACE_FLAG_INHERITED_ACE
);
2656 BOOL i_inh
= (nt_ace_list
[i
].flags
& SEC_ACE_FLAG_INHERITED_ACE
) ? True
: False
;
2657 BOOL j_inh
= (nt_ace_list
[j
].flags
& SEC_ACE_FLAG_INHERITED_ACE
) ? True
: False
;
2659 /* We know the lower number ACE's are file entries. */
2660 if ((nt_ace_list
[i
].type
== nt_ace_list
[j
].type
) &&
2661 (nt_ace_list
[i
].size
== nt_ace_list
[j
].size
) &&
2662 (nt_ace_list
[i
].info
.mask
== nt_ace_list
[j
].info
.mask
) &&
2663 sid_equal(&nt_ace_list
[i
].trustee
, &nt_ace_list
[j
].trustee
) &&
2665 (i_flags_ni
== 0) &&
2666 (j_flags_ni
== (SEC_ACE_FLAG_OBJECT_INHERIT
|
2667 SEC_ACE_FLAG_CONTAINER_INHERIT
|
2668 SEC_ACE_FLAG_INHERIT_ONLY
))) {
2670 * W2K wants to have access allowed zero access ACE's
2671 * at the end of the list. If the mask is zero, merge
2672 * the non-inherited ACE onto the inherited ACE.
2675 if (nt_ace_list
[i
].info
.mask
== 0) {
2676 nt_ace_list
[j
].flags
= SEC_ACE_FLAG_OBJECT_INHERIT
|SEC_ACE_FLAG_CONTAINER_INHERIT
|
2677 (i_inh
? SEC_ACE_FLAG_INHERITED_ACE
: 0);
2678 if (num_aces
- i
- 1 > 0)
2679 memmove(&nt_ace_list
[i
], &nt_ace_list
[i
+1], (num_aces
-i
-1) *
2682 DEBUG(10,("merge_default_aces: Merging zero access ACE %u onto ACE %u.\n",
2683 (unsigned int)i
, (unsigned int)j
));
2686 * These are identical except for the flags.
2687 * Merge the inherited ACE onto the non-inherited ACE.
2690 nt_ace_list
[i
].flags
= SEC_ACE_FLAG_OBJECT_INHERIT
|SEC_ACE_FLAG_CONTAINER_INHERIT
|
2691 (i_inh
? SEC_ACE_FLAG_INHERITED_ACE
: 0);
2692 if (num_aces
- j
- 1 > 0)
2693 memmove(&nt_ace_list
[j
], &nt_ace_list
[j
+1], (num_aces
-j
-1) *
2696 DEBUG(10,("merge_default_aces: Merging ACE %u onto ACE %u.\n",
2697 (unsigned int)j
, (unsigned int)i
));
2707 /****************************************************************************
2708 Reply to query a security descriptor from an fsp. If it succeeds it allocates
2709 the space for the return elements and returns the size needed to return the
2710 security descriptor. This should be the only external function needed for
2711 the UNIX style get ACL.
2712 ****************************************************************************/
2714 size_t get_nt_acl(files_struct
*fsp
, uint32 security_info
, SEC_DESC
**ppdesc
)
2716 connection_struct
*conn
= fsp
->conn
;
2717 SMB_STRUCT_STAT sbuf
;
2718 SEC_ACE
*nt_ace_list
= NULL
;
2722 SEC_ACL
*psa
= NULL
;
2723 size_t num_acls
= 0;
2724 size_t num_def_acls
= 0;
2725 size_t num_aces
= 0;
2726 SMB_ACL_T posix_acl
= NULL
;
2727 SMB_ACL_T def_acl
= NULL
;
2728 canon_ace
*file_ace
= NULL
;
2729 canon_ace
*dir_ace
= NULL
;
2730 size_t num_profile_acls
= 0;
2731 struct pai_val
*pal
= NULL
;
2732 SEC_DESC
*psd
= NULL
;
2736 DEBUG(10,("get_nt_acl: called for file %s\n", fsp
->fsp_name
));
2738 if(fsp
->is_directory
|| fsp
->fh
->fd
== -1) {
2740 /* Get the stat struct for the owner info. */
2741 if(SMB_VFS_STAT(fsp
->conn
,fsp
->fsp_name
, &sbuf
) != 0) {
2745 * Get the ACL from the path.
2748 posix_acl
= SMB_VFS_SYS_ACL_GET_FILE(conn
, fsp
->fsp_name
, SMB_ACL_TYPE_ACCESS
);
2751 * If it's a directory get the default POSIX ACL.
2754 if(fsp
->is_directory
) {
2755 def_acl
= SMB_VFS_SYS_ACL_GET_FILE(conn
, fsp
->fsp_name
, SMB_ACL_TYPE_DEFAULT
);
2756 def_acl
= free_empty_sys_acl(conn
, def_acl
);
2761 /* Get the stat struct for the owner info. */
2762 if(SMB_VFS_FSTAT(fsp
,fsp
->fh
->fd
,&sbuf
) != 0) {
2766 * Get the ACL from the fd.
2768 posix_acl
= SMB_VFS_SYS_ACL_GET_FD(fsp
, fsp
->fh
->fd
);
2771 DEBUG(5,("get_nt_acl : file ACL %s, directory ACL %s\n",
2772 posix_acl
? "present" : "absent",
2773 def_acl
? "present" : "absent" ));
2775 pal
= load_inherited_info(fsp
);
2778 * Get the owner, group and world SIDs.
2781 if (lp_profile_acls(SNUM(conn
))) {
2782 /* For WXP SP1 the owner must be administrators. */
2783 sid_copy(&owner_sid
, &global_sid_Builtin_Administrators
);
2784 sid_copy(&group_sid
, &global_sid_Builtin_Users
);
2785 num_profile_acls
= 2;
2787 create_file_sids(&sbuf
, &owner_sid
, &group_sid
);
2790 if ((security_info
& DACL_SECURITY_INFORMATION
) && !(security_info
& PROTECTED_DACL_SECURITY_INFORMATION
)) {
2793 * In the optimum case Creator Owner and Creator Group would be used for
2794 * the ACL_USER_OBJ and ACL_GROUP_OBJ entries, respectively, but this
2795 * would lead to usability problems under Windows: The Creator entries
2796 * are only available in browse lists of directories and not for files;
2797 * additionally the identity of the owning group couldn't be determined.
2798 * We therefore use those identities only for Default ACLs.
2801 /* Create the canon_ace lists. */
2802 file_ace
= canonicalise_acl( fsp
, posix_acl
, &sbuf
, &owner_sid
, &group_sid
, pal
, SMB_ACL_TYPE_ACCESS
);
2804 /* We must have *some* ACLS. */
2806 if (count_canon_ace_list(file_ace
) == 0) {
2807 DEBUG(0,("get_nt_acl : No ACLs on file (%s) !\n", fsp
->fsp_name
));
2811 if (fsp
->is_directory
&& def_acl
) {
2812 dir_ace
= canonicalise_acl(fsp
, def_acl
, &sbuf
,
2813 &global_sid_Creator_Owner
,
2814 &global_sid_Creator_Group
, pal
, SMB_ACL_TYPE_DEFAULT
);
2818 * Create the NT ACE list from the canonical ace lists.
2826 if (nt4_compatible_acls() && dir_ace
) {
2828 * NT 4 chokes if an ACL contains an INHERIT_ONLY entry
2829 * but no non-INHERIT_ONLY entry for one SID. So we only
2830 * remove entries from the Access ACL if the
2831 * corresponding Default ACL entries have also been
2832 * removed. ACEs for CREATOR-OWNER and CREATOR-GROUP
2833 * are exceptions. We can do nothing
2834 * intelligent if the Default ACL contains entries that
2835 * are not also contained in the Access ACL, so this
2836 * case will still fail under NT 4.
2839 ace
= canon_ace_entry_for(dir_ace
, SMB_ACL_OTHER
, NULL
);
2840 if (ace
&& !ace
->perms
) {
2841 DLIST_REMOVE(dir_ace
, ace
);
2844 ace
= canon_ace_entry_for(file_ace
, SMB_ACL_OTHER
, NULL
);
2845 if (ace
&& !ace
->perms
) {
2846 DLIST_REMOVE(file_ace
, ace
);
2852 * WinNT doesn't usually have Creator Group
2853 * in browse lists, so we send this entry to
2854 * WinNT even if it contains no relevant
2855 * permissions. Once we can add
2856 * Creator Group to browse lists we can
2861 ace
= canon_ace_entry_for(dir_ace
, SMB_ACL_GROUP_OBJ
, NULL
);
2862 if (ace
&& !ace
->perms
) {
2863 DLIST_REMOVE(dir_ace
, ace
);
2868 ace
= canon_ace_entry_for(file_ace
, SMB_ACL_GROUP_OBJ
, NULL
);
2869 if (ace
&& !ace
->perms
) {
2870 DLIST_REMOVE(file_ace
, ace
);
2875 num_acls
= count_canon_ace_list(file_ace
);
2876 num_def_acls
= count_canon_ace_list(dir_ace
);
2878 /* Allocate the ace list. */
2879 if ((nt_ace_list
= SMB_MALLOC_ARRAY(SEC_ACE
,num_acls
+ num_profile_acls
+ num_def_acls
)) == NULL
) {
2880 DEBUG(0,("get_nt_acl: Unable to malloc space for nt_ace_list.\n"));
2884 memset(nt_ace_list
, '\0', (num_acls
+ num_def_acls
) * sizeof(SEC_ACE
) );
2887 * Create the NT ACE list from the canonical ace lists.
2892 for (i
= 0; i
< num_acls
; i
++, ace
= ace
->next
) {
2895 acc
= map_canon_ace_perms(SNUM(conn
), &nt_acl_type
, &owner_sid
, ace
, fsp
->is_directory
);
2896 init_sec_ace(&nt_ace_list
[num_aces
++], &ace
->trustee
, nt_acl_type
, acc
, ace
->inherited
? SEC_ACE_FLAG_INHERITED_ACE
: 0);
2899 /* The User must have access to a profile share - even if we can't map the SID. */
2900 if (lp_profile_acls(SNUM(conn
))) {
2903 init_sec_access(&acc
,FILE_GENERIC_ALL
);
2904 init_sec_ace(&nt_ace_list
[num_aces
++], &global_sid_Builtin_Users
, SEC_ACE_TYPE_ACCESS_ALLOWED
,
2910 for (i
= 0; i
< num_def_acls
; i
++, ace
= ace
->next
) {
2913 acc
= map_canon_ace_perms(SNUM(conn
), &nt_acl_type
, &owner_sid
, ace
, fsp
->is_directory
);
2914 init_sec_ace(&nt_ace_list
[num_aces
++], &ace
->trustee
, nt_acl_type
, acc
,
2915 SEC_ACE_FLAG_OBJECT_INHERIT
|SEC_ACE_FLAG_CONTAINER_INHERIT
|
2916 SEC_ACE_FLAG_INHERIT_ONLY
|
2917 (ace
->inherited
? SEC_ACE_FLAG_INHERITED_ACE
: 0));
2920 /* The User must have access to a profile share - even if we can't map the SID. */
2921 if (lp_profile_acls(SNUM(conn
))) {
2924 init_sec_access(&acc
,FILE_GENERIC_ALL
);
2925 init_sec_ace(&nt_ace_list
[num_aces
++], &global_sid_Builtin_Users
, SEC_ACE_TYPE_ACCESS_ALLOWED
, acc
,
2926 SEC_ACE_FLAG_OBJECT_INHERIT
|SEC_ACE_FLAG_CONTAINER_INHERIT
|
2927 SEC_ACE_FLAG_INHERIT_ONLY
|0);
2931 * Merge POSIX default ACLs and normal ACLs into one NT ACE.
2932 * Win2K needs this to get the inheritance correct when replacing ACLs
2933 * on a directory tree. Based on work by Jim @ IBM.
2936 num_aces
= merge_default_aces(nt_ace_list
, num_aces
);
2941 if((psa
= make_sec_acl( main_loop_talloc_get(), NT4_ACL_REVISION
, num_aces
, nt_ace_list
)) == NULL
) {
2942 DEBUG(0,("get_nt_acl: Unable to malloc space for acl.\n"));
2946 } /* security_info & DACL_SECURITY_INFORMATION */
2948 psd
= make_standard_sec_desc( main_loop_talloc_get(),
2949 (security_info
& OWNER_SECURITY_INFORMATION
) ? &owner_sid
: NULL
,
2950 (security_info
& GROUP_SECURITY_INFORMATION
) ? &group_sid
: NULL
,
2955 DEBUG(0,("get_nt_acl: Unable to malloc space for security descriptor.\n"));
2961 * Windows 2000: The DACL_PROTECTED flag in the security
2962 * descriptor marks the ACL as non-inheriting, i.e., no
2963 * ACEs from higher level directories propagate to this
2964 * ACL. In the POSIX ACL model permissions are only
2965 * inherited at file create time, so ACLs never contain
2966 * any ACEs that are inherited dynamically. The DACL_PROTECTED
2967 * flag doesn't seem to bother Windows NT.
2968 * Always set this if map acl inherit is turned off.
2970 if (get_protected_flag(pal
) || !lp_map_acl_inherit(SNUM(conn
))) {
2971 psd
->type
|= SE_DESC_DACL_PROTECTED
;
2975 dacl_sort_into_canonical_order(psd
->dacl
->ace
, (unsigned int)psd
->dacl
->num_aces
);
2983 SMB_VFS_SYS_ACL_FREE_ACL(conn
, posix_acl
);
2986 SMB_VFS_SYS_ACL_FREE_ACL(conn
, def_acl
);
2988 free_canon_ace_list(file_ace
);
2989 free_canon_ace_list(dir_ace
);
2990 free_inherited_info(pal
);
2991 SAFE_FREE(nt_ace_list
);
2996 /****************************************************************************
2997 Try to chown a file. We will be able to chown it under the following conditions.
2999 1) If we have root privileges, then it will just work.
3000 2) If we have SeTakeOwnershipPrivilege we can change the user to the current user.
3001 3) If we have SeRestorePrivilege we can change the user to any other user.
3002 4) If we have write permission to the file and dos_filemodes is set
3003 then allow chown to the currently authenticated user.
3004 ****************************************************************************/
3006 static int try_chown(connection_struct
*conn
, const char *fname
, uid_t uid
, gid_t gid
)
3012 if(!CAN_WRITE(conn
)) {
3017 /* try the direct way first */
3018 ret
= SMB_VFS_CHOWN(conn
, fname
, uid
, gid
);
3022 /* Case (2) / (3) */
3023 if (lp_enable_privileges()) {
3025 BOOL has_take_ownership_priv
= user_has_privileges(current_user
.nt_user_token
,
3026 &se_take_ownership
);
3027 BOOL has_restore_priv
= user_has_privileges(current_user
.nt_user_token
,
3031 if ( ( has_take_ownership_priv
&& ( uid
== current_user
.uid
) ) ||
3033 ( has_restore_priv
) ) {
3036 /* Keep the current file gid the same - take ownership doesn't imply group change. */
3037 ret
= SMB_VFS_CHOWN(conn
, fname
, uid
, (gid_t
)-1);
3044 if (!lp_dos_filemode(SNUM(conn
))) {
3048 if (SMB_VFS_STAT(conn
,fname
,&st
)) {
3052 fsp
= open_file_fchmod(conn
,fname
,&st
);
3057 /* only allow chown to the current user. This is more secure,
3058 and also copes with the case where the SID in a take ownership ACL is
3059 a local SID on the users workstation
3061 uid
= current_user
.uid
;
3064 /* Keep the current file gid the same. */
3065 ret
= SMB_VFS_FCHOWN(fsp
, fsp
->fh
->fd
, uid
, (gid_t
)-1);
3068 close_file_fchmod(fsp
);
3073 /****************************************************************************
3074 Reply to set a security descriptor on an fsp. security_info_sent is the
3075 description of the following NT ACL.
3076 This should be the only external function needed for the UNIX style set ACL.
3077 ****************************************************************************/
3079 BOOL
set_nt_acl(files_struct
*fsp
, uint32 security_info_sent
, SEC_DESC
*psd
)
3081 connection_struct
*conn
= fsp
->conn
;
3082 uid_t user
= (uid_t
)-1;
3083 gid_t grp
= (gid_t
)-1;
3084 SMB_STRUCT_STAT sbuf
;
3085 DOM_SID file_owner_sid
;
3086 DOM_SID file_grp_sid
;
3087 canon_ace
*file_ace_list
= NULL
;
3088 canon_ace
*dir_ace_list
= NULL
;
3089 BOOL acl_perms
= False
;
3090 mode_t orig_mode
= (mode_t
)0;
3093 BOOL need_chown
= False
;
3095 DEBUG(10,("set_nt_acl: called for file %s\n", fsp
->fsp_name
));
3097 if (!CAN_WRITE(conn
)) {
3098 DEBUG(10,("set acl rejected on read-only share\n"));
3103 * Get the current state of the file.
3106 if(fsp
->is_directory
|| fsp
->fh
->fd
== -1) {
3107 if(SMB_VFS_STAT(fsp
->conn
,fsp
->fsp_name
, &sbuf
) != 0)
3110 if(SMB_VFS_FSTAT(fsp
,fsp
->fh
->fd
,&sbuf
) != 0)
3114 /* Save the original elements we check against. */
3115 orig_mode
= sbuf
.st_mode
;
3116 orig_uid
= sbuf
.st_uid
;
3117 orig_gid
= sbuf
.st_gid
;
3120 * Unpack the user/group/world id's.
3123 if (!unpack_nt_owners( SNUM(conn
), &sbuf
, &user
, &grp
, security_info_sent
, psd
)) {
3128 * Do we need to chown ?
3131 if (((user
!= (uid_t
)-1) && (orig_uid
!= user
)) || (( grp
!= (gid_t
)-1) && (orig_gid
!= grp
))) {
3136 * Chown before setting ACL only if we don't change the user, or
3137 * if we change to the current user, but not if we want to give away
3141 if (need_chown
&& (user
== (uid_t
)-1 || user
== current_user
.uid
)) {
3143 DEBUG(3,("set_nt_acl: chown %s. uid = %u, gid = %u.\n",
3144 fsp
->fsp_name
, (unsigned int)user
, (unsigned int)grp
));
3146 if(try_chown( fsp
->conn
, fsp
->fsp_name
, user
, grp
) == -1) {
3147 DEBUG(3,("set_nt_acl: chown %s, %u, %u failed. Error = %s.\n",
3148 fsp
->fsp_name
, (unsigned int)user
, (unsigned int)grp
, strerror(errno
) ));
3153 * Recheck the current state of the file, which may have changed.
3154 * (suid/sgid bits, for instance)
3157 if(fsp
->is_directory
) {
3158 if(SMB_VFS_STAT(fsp
->conn
, fsp
->fsp_name
, &sbuf
) != 0) {
3165 if(fsp
->fh
->fd
== -1)
3166 ret
= SMB_VFS_STAT(fsp
->conn
, fsp
->fsp_name
, &sbuf
);
3168 ret
= SMB_VFS_FSTAT(fsp
,fsp
->fh
->fd
,&sbuf
);
3174 /* Save the original elements we check against. */
3175 orig_mode
= sbuf
.st_mode
;
3176 orig_uid
= sbuf
.st_uid
;
3177 orig_gid
= sbuf
.st_gid
;
3179 /* We did it, don't try again */
3183 create_file_sids(&sbuf
, &file_owner_sid
, &file_grp_sid
);
3185 acl_perms
= unpack_canon_ace( fsp
, &sbuf
, &file_owner_sid
, &file_grp_sid
,
3186 &file_ace_list
, &dir_ace_list
, security_info_sent
, psd
);
3188 /* Ignore W2K traverse DACL set. */
3189 if (file_ace_list
|| dir_ace_list
) {
3192 DEBUG(3,("set_nt_acl: cannot set permissions\n"));
3193 free_canon_ace_list(file_ace_list
);
3194 free_canon_ace_list(dir_ace_list
);
3199 * Only change security if we got a DACL.
3202 if((security_info_sent
& DACL_SECURITY_INFORMATION
) && (psd
->dacl
!= NULL
)) {
3204 BOOL acl_set_support
= False
;
3208 * Try using the POSIX ACL set first. Fall back to chmod if
3209 * we have no ACL support on this filesystem.
3212 if (acl_perms
&& file_ace_list
) {
3213 ret
= set_canon_ace_list(fsp
, file_ace_list
, False
, sbuf
.st_gid
, &acl_set_support
);
3214 if (acl_set_support
&& ret
== False
) {
3215 DEBUG(3,("set_nt_acl: failed to set file acl on file %s (%s).\n", fsp
->fsp_name
, strerror(errno
) ));
3216 free_canon_ace_list(file_ace_list
);
3217 free_canon_ace_list(dir_ace_list
);
3222 if (acl_perms
&& acl_set_support
&& fsp
->is_directory
) {
3224 if (!set_canon_ace_list(fsp
, dir_ace_list
, True
, sbuf
.st_gid
, &acl_set_support
)) {
3225 DEBUG(3,("set_nt_acl: failed to set default acl on directory %s (%s).\n", fsp
->fsp_name
, strerror(errno
) ));
3226 free_canon_ace_list(file_ace_list
);
3227 free_canon_ace_list(dir_ace_list
);
3233 * No default ACL - delete one if it exists.
3236 if (SMB_VFS_SYS_ACL_DELETE_DEF_FILE(conn
, fsp
->fsp_name
) == -1) {
3239 if (acl_group_override(conn
, sbuf
.st_gid
)) {
3240 DEBUG(5,("set_nt_acl: acl group control on and "
3241 "current user in file %s primary group. Override delete_def_acl\n",
3245 sret
= SMB_VFS_SYS_ACL_DELETE_DEF_FILE(conn
, fsp
->fsp_name
);
3250 DEBUG(3,("set_nt_acl: sys_acl_delete_def_file failed (%s)\n", strerror(errno
)));
3251 free_canon_ace_list(file_ace_list
);
3252 free_canon_ace_list(dir_ace_list
);
3259 if (acl_set_support
) {
3260 store_inheritance_attributes(fsp
, file_ace_list
, dir_ace_list
,
3261 (psd
->type
& SE_DESC_DACL_PROTECTED
) ? True
: False
);
3265 * If we cannot set using POSIX ACLs we fall back to checking if we need to chmod.
3268 if(!acl_set_support
&& acl_perms
) {
3271 if (!convert_canon_ace_to_posix_perms( fsp
, file_ace_list
, &posix_perms
)) {
3272 free_canon_ace_list(file_ace_list
);
3273 free_canon_ace_list(dir_ace_list
);
3274 DEBUG(3,("set_nt_acl: failed to convert file acl to posix permissions for file %s.\n",
3279 if (orig_mode
!= posix_perms
) {
3281 DEBUG(3,("set_nt_acl: chmod %s. perms = 0%o.\n",
3282 fsp
->fsp_name
, (unsigned int)posix_perms
));
3284 if(SMB_VFS_CHMOD(conn
,fsp
->fsp_name
, posix_perms
) == -1) {
3286 if (acl_group_override(conn
, sbuf
.st_gid
)) {
3287 DEBUG(5,("set_nt_acl: acl group control on and "
3288 "current user in file %s primary group. Override chmod\n",
3292 sret
= SMB_VFS_CHMOD(conn
,fsp
->fsp_name
, posix_perms
);
3297 DEBUG(3,("set_nt_acl: chmod %s, 0%o failed. Error = %s.\n",
3298 fsp
->fsp_name
, (unsigned int)posix_perms
, strerror(errno
) ));
3299 free_canon_ace_list(file_ace_list
);
3300 free_canon_ace_list(dir_ace_list
);
3308 free_canon_ace_list(file_ace_list
);
3309 free_canon_ace_list(dir_ace_list
);
3312 /* Any chown pending? */
3315 DEBUG(3,("set_nt_acl: chown %s. uid = %u, gid = %u.\n",
3316 fsp
->fsp_name
, (unsigned int)user
, (unsigned int)grp
));
3318 if(try_chown( fsp
->conn
, fsp
->fsp_name
, user
, grp
) == -1) {
3319 DEBUG(3,("set_nt_acl: chown %s, %u, %u failed. Error = %s.\n",
3320 fsp
->fsp_name
, (unsigned int)user
, (unsigned int)grp
, strerror(errno
) ));
3328 /****************************************************************************
3329 Get the actual group bits stored on a file with an ACL. Has no effect if
3330 the file has no ACL. Needed in dosmode code where the stat() will return
3331 the mask bits, not the real group bits, for a file with an ACL.
3332 ****************************************************************************/
3334 int get_acl_group_bits( connection_struct
*conn
, const char *fname
, mode_t
*mode
)
3336 int entry_id
= SMB_ACL_FIRST_ENTRY
;
3337 SMB_ACL_ENTRY_T entry
;
3338 SMB_ACL_T posix_acl
;
3341 posix_acl
= SMB_VFS_SYS_ACL_GET_FILE(conn
, fname
, SMB_ACL_TYPE_ACCESS
);
3342 if (posix_acl
== (SMB_ACL_T
)NULL
)
3345 while (SMB_VFS_SYS_ACL_GET_ENTRY(conn
, posix_acl
, entry_id
, &entry
) == 1) {
3346 SMB_ACL_TAG_T tagtype
;
3347 SMB_ACL_PERMSET_T permset
;
3350 if (entry_id
== SMB_ACL_FIRST_ENTRY
)
3351 entry_id
= SMB_ACL_NEXT_ENTRY
;
3353 if (SMB_VFS_SYS_ACL_GET_TAG_TYPE(conn
, entry
, &tagtype
) ==-1)
3356 if (tagtype
== SMB_ACL_GROUP_OBJ
) {
3357 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn
, entry
, &permset
) == -1) {
3360 *mode
&= ~(S_IRGRP
|S_IWGRP
|S_IXGRP
);
3361 *mode
|= (SMB_VFS_SYS_ACL_GET_PERM(conn
, permset
, SMB_ACL_READ
) ? S_IRGRP
: 0);
3362 *mode
|= (SMB_VFS_SYS_ACL_GET_PERM(conn
, permset
, SMB_ACL_WRITE
) ? S_IWGRP
: 0);
3363 *mode
|= (SMB_VFS_SYS_ACL_GET_PERM(conn
, permset
, SMB_ACL_EXECUTE
) ? S_IXGRP
: 0);
3369 SMB_VFS_SYS_ACL_FREE_ACL(conn
, posix_acl
);
3373 /****************************************************************************
3374 Do a chmod by setting the ACL USER_OBJ, GROUP_OBJ and OTHER bits in an ACL
3375 and set the mask to rwx. Needed to preserve complex ACLs set by NT.
3376 ****************************************************************************/
3378 static int chmod_acl_internals( connection_struct
*conn
, SMB_ACL_T posix_acl
, mode_t mode
)
3380 int entry_id
= SMB_ACL_FIRST_ENTRY
;
3381 SMB_ACL_ENTRY_T entry
;
3382 int num_entries
= 0;
3384 while ( SMB_VFS_SYS_ACL_GET_ENTRY(conn
, posix_acl
, entry_id
, &entry
) == 1) {
3385 SMB_ACL_TAG_T tagtype
;
3386 SMB_ACL_PERMSET_T permset
;
3390 if (entry_id
== SMB_ACL_FIRST_ENTRY
)
3391 entry_id
= SMB_ACL_NEXT_ENTRY
;
3393 if (SMB_VFS_SYS_ACL_GET_TAG_TYPE(conn
, entry
, &tagtype
) == -1)
3396 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn
, entry
, &permset
) == -1)
3402 case SMB_ACL_USER_OBJ
:
3403 perms
= unix_perms_to_acl_perms(mode
, S_IRUSR
, S_IWUSR
, S_IXUSR
);
3405 case SMB_ACL_GROUP_OBJ
:
3406 perms
= unix_perms_to_acl_perms(mode
, S_IRGRP
, S_IWGRP
, S_IXGRP
);
3410 * FIXME: The ACL_MASK entry permissions should really be set to
3411 * the union of the permissions of all ACL_USER,
3412 * ACL_GROUP_OBJ, and ACL_GROUP entries. That's what
3413 * acl_calc_mask() does, but Samba ACLs doesn't provide it.
3415 perms
= S_IRUSR
|S_IWUSR
|S_IXUSR
;
3418 perms
= unix_perms_to_acl_perms(mode
, S_IROTH
, S_IWOTH
, S_IXOTH
);
3424 if (map_acl_perms_to_permset(conn
, perms
, &permset
) == -1)
3427 if (SMB_VFS_SYS_ACL_SET_PERMSET(conn
, entry
, permset
) == -1)
3432 * If this is a simple 3 element ACL or no elements then it's a standard
3433 * UNIX permission set. Just use chmod...
3436 if ((num_entries
== 3) || (num_entries
== 0))
3442 /****************************************************************************
3443 Get the access ACL of FROM, do a chmod by setting the ACL USER_OBJ,
3444 GROUP_OBJ and OTHER bits in an ACL and set the mask to rwx. Set the
3445 resulting ACL on TO. Note that name is in UNIX character set.
3446 ****************************************************************************/
3448 static int copy_access_acl(connection_struct
*conn
, const char *from
, const char *to
, mode_t mode
)
3450 SMB_ACL_T posix_acl
= NULL
;
3453 if ((posix_acl
= SMB_VFS_SYS_ACL_GET_FILE(conn
, from
, SMB_ACL_TYPE_ACCESS
)) == NULL
)
3456 if ((ret
= chmod_acl_internals(conn
, posix_acl
, mode
)) == -1)
3459 ret
= SMB_VFS_SYS_ACL_SET_FILE(conn
, to
, SMB_ACL_TYPE_ACCESS
, posix_acl
);
3463 SMB_VFS_SYS_ACL_FREE_ACL(conn
, posix_acl
);
3467 /****************************************************************************
3468 Do a chmod by setting the ACL USER_OBJ, GROUP_OBJ and OTHER bits in an ACL
3469 and set the mask to rwx. Needed to preserve complex ACLs set by NT.
3470 Note that name is in UNIX character set.
3471 ****************************************************************************/
3473 int chmod_acl(connection_struct
*conn
, const char *name
, mode_t mode
)
3475 return copy_access_acl(conn
, name
, name
, mode
);
3478 /****************************************************************************
3479 If "inherit permissions" is set and the parent directory has no default
3480 ACL but it does have an Access ACL, inherit this Access ACL to file name.
3481 ****************************************************************************/
3483 int inherit_access_acl(connection_struct
*conn
, const char *name
, mode_t mode
)
3486 pstrcpy(dirname
, parent_dirname(name
));
3488 if (!lp_inherit_perms(SNUM(conn
)) || directory_has_default_acl(conn
, dirname
))
3491 return copy_access_acl(conn
, dirname
, name
, mode
);
3494 /****************************************************************************
3495 Do an fchmod by setting the ACL USER_OBJ, GROUP_OBJ and OTHER bits in an ACL
3496 and set the mask to rwx. Needed to preserve complex ACLs set by NT.
3497 ****************************************************************************/
3499 int fchmod_acl(files_struct
*fsp
, int fd
, mode_t mode
)
3501 connection_struct
*conn
= fsp
->conn
;
3502 SMB_ACL_T posix_acl
= NULL
;
3505 if ((posix_acl
= SMB_VFS_SYS_ACL_GET_FD(fsp
, fd
)) == NULL
)
3508 if ((ret
= chmod_acl_internals(conn
, posix_acl
, mode
)) == -1)
3511 ret
= SMB_VFS_SYS_ACL_SET_FD(fsp
, fd
, posix_acl
);
3515 SMB_VFS_SYS_ACL_FREE_ACL(conn
, posix_acl
);
3519 /****************************************************************************
3520 Check for an existing default POSIX ACL on a directory.
3521 ****************************************************************************/
3523 BOOL
directory_has_default_acl(connection_struct
*conn
, const char *fname
)
3525 SMB_ACL_T def_acl
= SMB_VFS_SYS_ACL_GET_FILE( conn
, fname
, SMB_ACL_TYPE_DEFAULT
);
3526 BOOL has_acl
= False
;
3527 SMB_ACL_ENTRY_T entry
;
3529 if (def_acl
!= NULL
&& (SMB_VFS_SYS_ACL_GET_ENTRY(conn
, def_acl
, SMB_ACL_FIRST_ENTRY
, &entry
) == 1)) {
3534 SMB_VFS_SYS_ACL_FREE_ACL(conn
, def_acl
);
3539 /****************************************************************************
3540 Map from wire type to permset.
3541 ****************************************************************************/
3543 static BOOL
unix_ex_wire_to_permset(connection_struct
*conn
, unsigned char wire_perm
, SMB_ACL_PERMSET_T
*p_permset
)
3545 if (wire_perm
& ~(SMB_POSIX_ACL_READ
|SMB_POSIX_ACL_WRITE
|SMB_POSIX_ACL_EXECUTE
)) {
3549 if (SMB_VFS_SYS_ACL_CLEAR_PERMS(conn
, *p_permset
) == -1) {
3553 if (wire_perm
& SMB_POSIX_ACL_READ
) {
3554 if (SMB_VFS_SYS_ACL_ADD_PERM(conn
, *p_permset
, SMB_ACL_READ
) == -1) {
3558 if (wire_perm
& SMB_POSIX_ACL_WRITE
) {
3559 if (SMB_VFS_SYS_ACL_ADD_PERM(conn
, *p_permset
, SMB_ACL_WRITE
) == -1) {
3563 if (wire_perm
& SMB_POSIX_ACL_EXECUTE
) {
3564 if (SMB_VFS_SYS_ACL_ADD_PERM(conn
, *p_permset
, SMB_ACL_EXECUTE
) == -1) {
3571 /****************************************************************************
3572 Map from wire type to tagtype.
3573 ****************************************************************************/
3575 static BOOL
unix_ex_wire_to_tagtype(unsigned char wire_tt
, SMB_ACL_TAG_T
*p_tt
)
3578 case SMB_POSIX_ACL_USER_OBJ
:
3579 *p_tt
= SMB_ACL_USER_OBJ
;
3581 case SMB_POSIX_ACL_USER
:
3582 *p_tt
= SMB_ACL_USER
;
3584 case SMB_POSIX_ACL_GROUP_OBJ
:
3585 *p_tt
= SMB_ACL_GROUP_OBJ
;
3587 case SMB_POSIX_ACL_GROUP
:
3588 *p_tt
= SMB_ACL_GROUP
;
3590 case SMB_POSIX_ACL_MASK
:
3591 *p_tt
= SMB_ACL_MASK
;
3593 case SMB_POSIX_ACL_OTHER
:
3594 *p_tt
= SMB_ACL_OTHER
;
3602 /****************************************************************************
3603 Create a new POSIX acl from wire permissions.
3604 FIXME ! How does the share mask/mode fit into this.... ?
3605 ****************************************************************************/
3607 static SMB_ACL_T
create_posix_acl_from_wire(connection_struct
*conn
, uint16 num_acls
, const char *pdata
)
3610 SMB_ACL_T the_acl
= SMB_VFS_SYS_ACL_INIT(conn
, num_acls
);
3612 if (the_acl
== NULL
) {
3616 for (i
= 0; i
< num_acls
; i
++) {
3617 SMB_ACL_ENTRY_T the_entry
;
3618 SMB_ACL_PERMSET_T the_permset
;
3619 SMB_ACL_TAG_T tag_type
;
3621 if (SMB_VFS_SYS_ACL_CREATE_ENTRY(conn
, &the_acl
, &the_entry
) == -1) {
3622 DEBUG(0,("create_posix_acl_from_wire: Failed to create entry %u. (%s)\n",
3623 i
, strerror(errno
) ));
3627 if (!unix_ex_wire_to_tagtype(CVAL(pdata
,(i
*SMB_POSIX_ACL_ENTRY_SIZE
)), &tag_type
)) {
3628 DEBUG(0,("create_posix_acl_from_wire: invalid wire tagtype %u on entry %u.\n",
3629 CVAL(pdata
,(i
*SMB_POSIX_ACL_ENTRY_SIZE
)), i
));
3633 if (SMB_VFS_SYS_ACL_SET_TAG_TYPE(conn
, the_entry
, tag_type
) == -1) {
3634 DEBUG(0,("create_posix_acl_from_wire: Failed to set tagtype on entry %u. (%s)\n",
3635 i
, strerror(errno
) ));
3639 /* Get the permset pointer from the new ACL entry. */
3640 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn
, the_entry
, &the_permset
) == -1) {
3641 DEBUG(0,("create_posix_acl_from_wire: Failed to get permset on entry %u. (%s)\n",
3642 i
, strerror(errno
) ));
3646 /* Map from wire to permissions. */
3647 if (!unix_ex_wire_to_permset(conn
, CVAL(pdata
,(i
*SMB_POSIX_ACL_ENTRY_SIZE
)+1), &the_permset
)) {
3648 DEBUG(0,("create_posix_acl_from_wire: invalid permset %u on entry %u.\n",
3649 CVAL(pdata
,(i
*SMB_POSIX_ACL_ENTRY_SIZE
) + 1), i
));
3653 /* Now apply to the new ACL entry. */
3654 if (SMB_VFS_SYS_ACL_SET_PERMSET(conn
, the_entry
, the_permset
) == -1) {
3655 DEBUG(0,("create_posix_acl_from_wire: Failed to add permset on entry %u. (%s)\n",
3656 i
, strerror(errno
) ));
3660 if (tag_type
== SMB_ACL_USER
) {
3661 uint32 uidval
= IVAL(pdata
,(i
*SMB_POSIX_ACL_ENTRY_SIZE
)+2);
3662 uid_t uid
= (uid_t
)uidval
;
3663 if (SMB_VFS_SYS_ACL_SET_QUALIFIER(conn
, the_entry
,(void *)&uid
) == -1) {
3664 DEBUG(0,("create_posix_acl_from_wire: Failed to set uid %u on entry %u. (%s)\n",
3665 (unsigned int)uid
, i
, strerror(errno
) ));
3670 if (tag_type
== SMB_ACL_GROUP
) {
3671 uint32 gidval
= IVAL(pdata
,(i
*SMB_POSIX_ACL_ENTRY_SIZE
)+2);
3672 gid_t gid
= (uid_t
)gidval
;
3673 if (SMB_VFS_SYS_ACL_SET_QUALIFIER(conn
, the_entry
,(void *)&gid
) == -1) {
3674 DEBUG(0,("create_posix_acl_from_wire: Failed to set gid %u on entry %u. (%s)\n",
3675 (unsigned int)gid
, i
, strerror(errno
) ));
3685 if (the_acl
!= NULL
) {
3686 SMB_VFS_SYS_ACL_FREE_ACL(conn
, the_acl
);
3691 /****************************************************************************
3692 Calls from UNIX extensions - Default POSIX ACL set.
3693 If num_def_acls == 0 and not a directory just return. If it is a directory
3694 and num_def_acls == 0 then remove the default acl. Else set the default acl
3696 ****************************************************************************/
3698 BOOL
set_unix_posix_default_acl(connection_struct
*conn
, const char *fname
, SMB_STRUCT_STAT
*psbuf
,
3699 uint16 num_def_acls
, const char *pdata
)
3701 SMB_ACL_T def_acl
= NULL
;
3703 if (num_def_acls
&& !S_ISDIR(psbuf
->st_mode
)) {
3704 DEBUG(5,("set_unix_posix_default_acl: Can't set default ACL on non-directory file %s\n", fname
));
3709 if (!num_def_acls
) {
3710 /* Remove the default ACL. */
3711 if (SMB_VFS_SYS_ACL_DELETE_DEF_FILE(conn
, fname
) == -1) {
3712 DEBUG(5,("set_unix_posix_default_acl: acl_delete_def_file failed on directory %s (%s)\n",
3713 fname
, strerror(errno
) ));
3719 if ((def_acl
= create_posix_acl_from_wire(conn
, num_def_acls
, pdata
)) == NULL
) {
3723 if (SMB_VFS_SYS_ACL_SET_FILE(conn
, fname
, SMB_ACL_TYPE_DEFAULT
, def_acl
) == -1) {
3724 DEBUG(5,("set_unix_posix_default_acl: acl_set_file failed on directory %s (%s)\n",
3725 fname
, strerror(errno
) ));
3726 SMB_VFS_SYS_ACL_FREE_ACL(conn
, def_acl
);
3730 DEBUG(10,("set_unix_posix_default_acl: set default acl for file %s\n", fname
));
3731 SMB_VFS_SYS_ACL_FREE_ACL(conn
, def_acl
);
3735 /****************************************************************************
3736 Remove an ACL from a file. As we don't have acl_delete_entry() available
3737 we must read the current acl and copy all entries except MASK, USER and GROUP
3738 to a new acl, then set that. This (at least on Linux) causes any ACL to be
3740 FIXME ! How does the share mask/mode fit into this.... ?
3741 ****************************************************************************/
3743 static BOOL
remove_posix_acl(connection_struct
*conn
, files_struct
*fsp
, const char *fname
)
3745 SMB_ACL_T file_acl
= NULL
;
3746 int entry_id
= SMB_ACL_FIRST_ENTRY
;
3747 SMB_ACL_ENTRY_T entry
;
3749 /* Create a new ACL with only 3 entries, u/g/w. */
3750 SMB_ACL_T new_file_acl
= SMB_VFS_SYS_ACL_INIT(conn
, 3);
3751 SMB_ACL_ENTRY_T user_ent
= NULL
;
3752 SMB_ACL_ENTRY_T group_ent
= NULL
;
3753 SMB_ACL_ENTRY_T other_ent
= NULL
;
3755 if (new_file_acl
== NULL
) {
3756 DEBUG(5,("remove_posix_acl: failed to init new ACL with 3 entries for file %s.\n", fname
));
3760 /* Now create the u/g/w entries. */
3761 if (SMB_VFS_SYS_ACL_CREATE_ENTRY(conn
, &new_file_acl
, &user_ent
) == -1) {
3762 DEBUG(5,("remove_posix_acl: Failed to create user entry for file %s. (%s)\n",
3763 fname
, strerror(errno
) ));
3766 if (SMB_VFS_SYS_ACL_SET_TAG_TYPE(conn
, user_ent
, SMB_ACL_USER_OBJ
) == -1) {
3767 DEBUG(5,("remove_posix_acl: Failed to set user entry for file %s. (%s)\n",
3768 fname
, strerror(errno
) ));
3772 if (SMB_VFS_SYS_ACL_CREATE_ENTRY(conn
, &new_file_acl
, &group_ent
) == -1) {
3773 DEBUG(5,("remove_posix_acl: Failed to create group entry for file %s. (%s)\n",
3774 fname
, strerror(errno
) ));
3777 if (SMB_VFS_SYS_ACL_SET_TAG_TYPE(conn
, group_ent
, SMB_ACL_GROUP_OBJ
) == -1) {
3778 DEBUG(5,("remove_posix_acl: Failed to set group entry for file %s. (%s)\n",
3779 fname
, strerror(errno
) ));
3783 if (SMB_VFS_SYS_ACL_CREATE_ENTRY(conn
, &new_file_acl
, &other_ent
) == -1) {
3784 DEBUG(5,("remove_posix_acl: Failed to create other entry for file %s. (%s)\n",
3785 fname
, strerror(errno
) ));
3788 if (SMB_VFS_SYS_ACL_SET_TAG_TYPE(conn
, other_ent
, SMB_ACL_OTHER
) == -1) {
3789 DEBUG(5,("remove_posix_acl: Failed to set other entry for file %s. (%s)\n",
3790 fname
, strerror(errno
) ));
3794 /* Get the current file ACL. */
3795 if (fsp
&& fsp
->fh
->fd
!= -1) {
3796 file_acl
= SMB_VFS_SYS_ACL_GET_FD(fsp
, fsp
->fh
->fd
);
3798 file_acl
= SMB_VFS_SYS_ACL_GET_FILE( conn
, fname
, SMB_ACL_TYPE_ACCESS
);
3801 if (file_acl
== NULL
) {
3802 /* This is only returned if an error occurred. Even for a file with
3803 no acl a u/g/w acl should be returned. */
3804 DEBUG(5,("remove_posix_acl: failed to get ACL from file %s (%s).\n",
3805 fname
, strerror(errno
) ));
3809 while ( SMB_VFS_SYS_ACL_GET_ENTRY(conn
, file_acl
, entry_id
, &entry
) == 1) {
3810 SMB_ACL_TAG_T tagtype
;
3811 SMB_ACL_PERMSET_T permset
;
3814 if (entry_id
== SMB_ACL_FIRST_ENTRY
)
3815 entry_id
= SMB_ACL_NEXT_ENTRY
;
3817 if (SMB_VFS_SYS_ACL_GET_TAG_TYPE(conn
, entry
, &tagtype
) == -1) {
3818 DEBUG(5,("remove_posix_acl: failed to get tagtype from ACL on file %s (%s).\n",
3819 fname
, strerror(errno
) ));
3823 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn
, entry
, &permset
) == -1) {
3824 DEBUG(5,("remove_posix_acl: failed to get permset from ACL on file %s (%s).\n",
3825 fname
, strerror(errno
) ));
3829 if (tagtype
== SMB_ACL_USER_OBJ
) {
3830 if (SMB_VFS_SYS_ACL_SET_PERMSET(conn
, user_ent
, permset
) == -1) {
3831 DEBUG(5,("remove_posix_acl: failed to set permset from ACL on file %s (%s).\n",
3832 fname
, strerror(errno
) ));
3834 } else if (tagtype
== SMB_ACL_GROUP_OBJ
) {
3835 if (SMB_VFS_SYS_ACL_SET_PERMSET(conn
, group_ent
, permset
) == -1) {
3836 DEBUG(5,("remove_posix_acl: failed to set permset from ACL on file %s (%s).\n",
3837 fname
, strerror(errno
) ));
3839 } else if (tagtype
== SMB_ACL_OTHER
) {
3840 if (SMB_VFS_SYS_ACL_SET_PERMSET(conn
, other_ent
, permset
) == -1) {
3841 DEBUG(5,("remove_posix_acl: failed to set permset from ACL on file %s (%s).\n",
3842 fname
, strerror(errno
) ));
3852 SMB_VFS_SYS_ACL_FREE_ACL(conn
, file_acl
);
3855 SMB_VFS_SYS_ACL_FREE_ACL(conn
, new_file_acl
);
3860 /****************************************************************************
3861 Calls from UNIX extensions - POSIX ACL set.
3862 If num_def_acls == 0 then read/modify/write acl after removing all entries
3863 except SMB_ACL_USER_OBJ, SMB_ACL_GROUP_OBJ, SMB_ACL_OTHER.
3864 ****************************************************************************/
3866 BOOL
set_unix_posix_acl(connection_struct
*conn
, files_struct
*fsp
, const char *fname
, uint16 num_acls
, const char *pdata
)
3868 SMB_ACL_T file_acl
= NULL
;
3871 /* Remove the ACL from the file. */
3872 return remove_posix_acl(conn
, fsp
, fname
);
3875 if ((file_acl
= create_posix_acl_from_wire(conn
, num_acls
, pdata
)) == NULL
) {
3879 if (fsp
&& fsp
->fh
->fd
!= -1) {
3880 /* The preferred way - use an open fd. */
3881 if (SMB_VFS_SYS_ACL_SET_FD(fsp
, fsp
->fh
->fd
, file_acl
) == -1) {
3882 DEBUG(5,("set_unix_posix_acl: acl_set_file failed on %s (%s)\n",
3883 fname
, strerror(errno
) ));
3884 SMB_VFS_SYS_ACL_FREE_ACL(conn
, file_acl
);
3888 if (SMB_VFS_SYS_ACL_SET_FILE(conn
, fname
, SMB_ACL_TYPE_ACCESS
, file_acl
) == -1) {
3889 DEBUG(5,("set_unix_posix_acl: acl_set_file failed on %s (%s)\n",
3890 fname
, strerror(errno
) ));
3891 SMB_VFS_SYS_ACL_FREE_ACL(conn
, file_acl
);
3896 DEBUG(10,("set_unix_posix_acl: set acl for file %s\n", fname
));
3897 SMB_VFS_SYS_ACL_FREE_ACL(conn
, file_acl
);
3901 /****************************************************************************
3902 Check for POSIX group ACLs. If none use stat entry.
3903 Return -1 if no match, 0 if match and denied, 1 if match and allowed.
3904 ****************************************************************************/
3906 static int check_posix_acl_group_write(connection_struct
*conn
, const char *fname
, SMB_STRUCT_STAT
*psbuf
)
3908 SMB_ACL_T posix_acl
= NULL
;
3909 int entry_id
= SMB_ACL_FIRST_ENTRY
;
3910 SMB_ACL_ENTRY_T entry
;
3912 BOOL seen_mask
= False
;
3916 if ((posix_acl
= SMB_VFS_SYS_ACL_GET_FILE(conn
, fname
, SMB_ACL_TYPE_ACCESS
)) == NULL
) {
3920 /* First ensure the group mask allows group read. */
3921 /* Also check any user entries (these take preference over group). */
3923 while ( SMB_VFS_SYS_ACL_GET_ENTRY(conn
, posix_acl
, entry_id
, &entry
) == 1) {
3924 SMB_ACL_TAG_T tagtype
;
3925 SMB_ACL_PERMSET_T permset
;
3926 int have_write
= -1;
3929 if (entry_id
== SMB_ACL_FIRST_ENTRY
)
3930 entry_id
= SMB_ACL_NEXT_ENTRY
;
3932 if (SMB_VFS_SYS_ACL_GET_TAG_TYPE(conn
, entry
, &tagtype
) == -1) {
3936 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn
, entry
, &permset
) == -1) {
3940 have_write
= SMB_VFS_SYS_ACL_GET_PERM(conn
, permset
, SMB_ACL_WRITE
);
3941 if (have_write
== -1) {
3946 * Solaris returns 2 for this if write is available.
3947 * canonicalize to 0 or 1.
3949 have_write
= (have_write
? 1 : 0);
3954 /* We don't have any group or explicit user write permission. */
3955 ret
= -1; /* Allow caller to check "other" permissions. */
3956 DEBUG(10,("check_posix_acl_group_write: file %s \
3957 refusing write due to mask.\n", fname
));
3964 /* Check against current_user.uid. */
3965 uid_t
*puid
= (uid_t
*)SMB_VFS_SYS_ACL_GET_QUALIFIER(conn
, entry
);
3969 if (current_user
.uid
== *puid
) {
3970 /* We have a uid match but we must ensure we have seen the acl mask. */
3972 DEBUG(10,("check_posix_acl_group_write: file %s \
3973 match on user %u -> %s.\n", fname
, (unsigned int)*puid
, ret
? "can write" : "cannot write"));
3985 /* If ret is anything other than -1 we matched on a user entry. */
3990 /* Next check all group entries. */
3991 entry_id
= SMB_ACL_FIRST_ENTRY
;
3992 while ( SMB_VFS_SYS_ACL_GET_ENTRY(conn
, posix_acl
, entry_id
, &entry
) == 1) {
3993 SMB_ACL_TAG_T tagtype
;
3994 SMB_ACL_PERMSET_T permset
;
3995 int have_write
= -1;
3998 if (entry_id
== SMB_ACL_FIRST_ENTRY
)
3999 entry_id
= SMB_ACL_NEXT_ENTRY
;
4001 if (SMB_VFS_SYS_ACL_GET_TAG_TYPE(conn
, entry
, &tagtype
) == -1) {
4005 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn
, entry
, &permset
) == -1) {
4009 have_write
= SMB_VFS_SYS_ACL_GET_PERM(conn
, permset
, SMB_ACL_WRITE
);
4010 if (have_write
== -1) {
4015 * Solaris returns 2 for this if write is available.
4016 * canonicalize to 0 or 1.
4018 have_write
= (have_write
? 1 : 0);
4023 gid_t
*pgid
= (gid_t
*)SMB_VFS_SYS_ACL_GET_QUALIFIER(conn
, entry
);
4029 * Does it match the current effective group
4030 * or supplementary groups ?
4032 for (cu_gid
= get_current_user_gid_first(&i
); cu_gid
!= (gid_t
)-1;
4033 cu_gid
= get_current_user_gid_next(&i
)) {
4034 if (cu_gid
== *pgid
) {
4036 DEBUG(10,("check_posix_acl_group_write: file %s \
4037 match on group %u -> can write.\n", fname
, (unsigned int)cu_gid
));
4039 /* If we don't have write permission this entry doesn't
4040 terminate the enumeration of the entries. */
4044 /* But does terminate the group iteration. */
4055 /* If ret is -1 here we didn't match on the user entry or
4056 supplemental group entries. */
4058 DEBUG(10,("check_posix_acl_group_write: ret = %d before check_stat:\n", ret
));
4062 /* Do we match on the owning group entry ? */
4064 * Does it match the current effective group
4065 * or supplementary groups ?
4067 for (cu_gid
= get_current_user_gid_first(&i
); cu_gid
!= (gid_t
)-1;
4068 cu_gid
= get_current_user_gid_next(&i
)) {
4069 if (cu_gid
== psbuf
->st_gid
) {
4070 ret
= (psbuf
->st_mode
& S_IWGRP
) ? 1 : 0;
4071 DEBUG(10,("check_posix_acl_group_write: file %s \
4072 match on owning group %u -> %s.\n", fname
, (unsigned int)psbuf
->st_gid
, ret
? "can write" : "cannot write"));
4077 if (cu_gid
== (gid_t
)-1) {
4078 DEBUG(10,("check_posix_acl_group_write: file %s \
4079 failed to match on user or group in token (ret = %d).\n", fname
, ret
));
4085 SMB_VFS_SYS_ACL_FREE_ACL(conn
, posix_acl
);
4088 DEBUG(10,("check_posix_acl_group_write: file %s returning (ret = %d).\n", fname
, ret
));
4092 /****************************************************************************
4093 Actually emulate the in-kernel access checking for delete access. We need
4094 this to successfully return ACCESS_DENIED on a file open for delete access.
4095 ****************************************************************************/
4097 BOOL
can_delete_file_in_directory(connection_struct
*conn
, const char *fname
)
4099 SMB_STRUCT_STAT sbuf
;
4103 if (!CAN_WRITE(conn
)) {
4107 /* Get the parent directory permission mask and owners. */
4108 pstrcpy(dname
, parent_dirname(fname
));
4109 if(SMB_VFS_STAT(conn
, dname
, &sbuf
) != 0) {
4112 if (!S_ISDIR(sbuf
.st_mode
)) {
4115 if (current_user
.uid
== 0 || conn
->admin_user
) {
4116 /* I'm sorry sir, I didn't know you were root... */
4120 /* Check primary owner write access. */
4121 if (current_user
.uid
== sbuf
.st_uid
) {
4122 return (sbuf
.st_mode
& S_IWUSR
) ? True
: False
;
4126 /* sticky bit means delete only by owner or root. */
4127 if (sbuf
.st_mode
& S_ISVTX
) {
4128 SMB_STRUCT_STAT sbuf_file
;
4129 if(SMB_VFS_STAT(conn
, fname
, &sbuf_file
) != 0) {
4132 if (current_user
.uid
== sbuf_file
.st_uid
) {
4139 /* Check group or explicit user acl entry write access. */
4140 ret
= check_posix_acl_group_write(conn
, dname
, &sbuf
);
4141 if (ret
== 0 || ret
== 1) {
4142 return ret
? True
: False
;
4145 /* Finally check other write access. */
4146 return (sbuf
.st_mode
& S_IWOTH
) ? True
: False
;
4149 /****************************************************************************
4150 Actually emulate the in-kernel access checking for write access. We need
4151 this to successfully check for ability to write for dos filetimes.
4152 ****************************************************************************/
4154 BOOL
can_write_to_file(connection_struct
*conn
, const char *fname
, SMB_STRUCT_STAT
*psbuf
)
4158 if (!CAN_WRITE(conn
)) {
4162 if (current_user
.uid
== 0 || conn
->admin_user
) {
4163 /* I'm sorry sir, I didn't know you were root... */
4167 if (!VALID_STAT(*psbuf
)) {
4168 /* Get the file permission mask and owners. */
4169 if(SMB_VFS_STAT(conn
, fname
, psbuf
) != 0) {
4174 /* Check primary owner write access. */
4175 if (current_user
.uid
== psbuf
->st_uid
) {
4176 return (psbuf
->st_mode
& S_IWUSR
) ? True
: False
;
4179 /* Check group or explicit user acl entry write access. */
4180 ret
= check_posix_acl_group_write(conn
, fname
, psbuf
);
4181 if (ret
== 0 || ret
== 1) {
4182 return ret
? True
: False
;
4185 /* Finally check other write access. */
4186 return (psbuf
->st_mode
& S_IWOTH
) ? True
: False
;