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 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>.
23 extern struct current_user current_user
;
24 extern const struct generic_mapping file_generic_mapping
;
27 #define DBGC_CLASS DBGC_ACLS
29 /****************************************************************************
30 Data structures representing the internal ACE format.
31 ****************************************************************************/
33 enum ace_owner
{UID_ACE
, GID_ACE
, WORLD_ACE
};
34 enum ace_attribute
{ALLOW_ACE
, DENY_ACE
}; /* Used for incoming NT ACLS. */
36 typedef union posix_id
{
42 typedef struct canon_ace
{
43 struct canon_ace
*next
, *prev
;
45 mode_t perms
; /* Only use S_I(R|W|X)USR mode bits here. */
47 enum ace_owner owner_type
;
48 enum ace_attribute attr
;
53 #define ALL_ACE_PERMS (S_IRUSR|S_IWUSR|S_IXUSR)
56 * EA format of user.SAMBA_PAI (Samba_Posix_Acl_Interitance)
59 * | 1 | 1 | 2 | 2 | ....
60 * +------+------+-------------+---------------------+-------------+--------------------+
61 * | vers | flag | num_entries | num_default_entries | ..entries.. | default_entries... |
62 * +------+------+-------------+---------------------+-------------+--------------------+
65 #define PAI_VERSION_OFFSET 0
66 #define PAI_FLAG_OFFSET 1
67 #define PAI_NUM_ENTRIES_OFFSET 2
68 #define PAI_NUM_DEFAULT_ENTRIES_OFFSET 4
69 #define PAI_ENTRIES_BASE 6
72 #define PAI_ACL_FLAG_PROTECTED 0x1
73 #define PAI_ENTRY_LENGTH 5
76 * In memory format of user.SAMBA_PAI attribute.
80 struct pai_entry
*next
, *prev
;
81 enum ace_owner owner_type
;
87 unsigned int num_entries
;
88 struct pai_entry
*entry_list
;
89 unsigned int num_def_entries
;
90 struct pai_entry
*def_entry_list
;
93 /************************************************************************
94 Return a uint32 of the pai_entry principal.
95 ************************************************************************/
97 static uint32
get_pai_entry_val(struct pai_entry
*paie
)
99 switch (paie
->owner_type
) {
101 DEBUG(10,("get_pai_entry_val: uid = %u\n", (unsigned int)paie
->unix_ug
.uid
));
102 return (uint32
)paie
->unix_ug
.uid
;
104 DEBUG(10,("get_pai_entry_val: gid = %u\n", (unsigned int)paie
->unix_ug
.gid
));
105 return (uint32
)paie
->unix_ug
.gid
;
108 DEBUG(10,("get_pai_entry_val: world ace\n"));
113 /************************************************************************
114 Return a uint32 of the entry principal.
115 ************************************************************************/
117 static uint32
get_entry_val(canon_ace
*ace_entry
)
119 switch (ace_entry
->owner_type
) {
121 DEBUG(10,("get_entry_val: uid = %u\n", (unsigned int)ace_entry
->unix_ug
.uid
));
122 return (uint32
)ace_entry
->unix_ug
.uid
;
124 DEBUG(10,("get_entry_val: gid = %u\n", (unsigned int)ace_entry
->unix_ug
.gid
));
125 return (uint32
)ace_entry
->unix_ug
.gid
;
128 DEBUG(10,("get_entry_val: world ace\n"));
133 /************************************************************************
134 Count the inherited entries.
135 ************************************************************************/
137 static unsigned int num_inherited_entries(canon_ace
*ace_list
)
139 unsigned int num_entries
= 0;
141 for (; ace_list
; ace_list
= ace_list
->next
)
142 if (ace_list
->inherited
)
147 /************************************************************************
148 Create the on-disk format. Caller must free.
149 ************************************************************************/
151 static char *create_pai_buf(canon_ace
*file_ace_list
, canon_ace
*dir_ace_list
, bool pai_protected
, size_t *store_size
)
153 char *pai_buf
= NULL
;
154 canon_ace
*ace_list
= NULL
;
155 char *entry_offset
= NULL
;
156 unsigned int num_entries
= 0;
157 unsigned int num_def_entries
= 0;
159 for (ace_list
= file_ace_list
; ace_list
; ace_list
= ace_list
->next
)
160 if (ace_list
->inherited
)
163 for (ace_list
= dir_ace_list
; ace_list
; ace_list
= ace_list
->next
)
164 if (ace_list
->inherited
)
167 DEBUG(10,("create_pai_buf: num_entries = %u, num_def_entries = %u\n", num_entries
, num_def_entries
));
169 *store_size
= PAI_ENTRIES_BASE
+ ((num_entries
+ num_def_entries
)*PAI_ENTRY_LENGTH
);
171 pai_buf
= (char *)SMB_MALLOC(*store_size
);
176 /* Set up the header. */
177 memset(pai_buf
, '\0', PAI_ENTRIES_BASE
);
178 SCVAL(pai_buf
,PAI_VERSION_OFFSET
,PAI_VERSION
);
179 SCVAL(pai_buf
,PAI_FLAG_OFFSET
,(pai_protected
? PAI_ACL_FLAG_PROTECTED
: 0));
180 SSVAL(pai_buf
,PAI_NUM_ENTRIES_OFFSET
,num_entries
);
181 SSVAL(pai_buf
,PAI_NUM_DEFAULT_ENTRIES_OFFSET
,num_def_entries
);
183 entry_offset
= pai_buf
+ PAI_ENTRIES_BASE
;
185 for (ace_list
= file_ace_list
; ace_list
; ace_list
= ace_list
->next
) {
186 if (ace_list
->inherited
) {
187 uint8 type_val
= (unsigned char)ace_list
->owner_type
;
188 uint32 entry_val
= get_entry_val(ace_list
);
190 SCVAL(entry_offset
,0,type_val
);
191 SIVAL(entry_offset
,1,entry_val
);
192 entry_offset
+= PAI_ENTRY_LENGTH
;
196 for (ace_list
= dir_ace_list
; ace_list
; ace_list
= ace_list
->next
) {
197 if (ace_list
->inherited
) {
198 uint8 type_val
= (unsigned char)ace_list
->owner_type
;
199 uint32 entry_val
= get_entry_val(ace_list
);
201 SCVAL(entry_offset
,0,type_val
);
202 SIVAL(entry_offset
,1,entry_val
);
203 entry_offset
+= PAI_ENTRY_LENGTH
;
210 /************************************************************************
211 Store the user.SAMBA_PAI attribute on disk.
212 ************************************************************************/
214 static void store_inheritance_attributes(files_struct
*fsp
, canon_ace
*file_ace_list
,
215 canon_ace
*dir_ace_list
, bool pai_protected
)
221 if (!lp_map_acl_inherit(SNUM(fsp
->conn
)))
225 * Don't store if this ACL isn't protected and
226 * none of the entries in it are marked as inherited.
229 if (!pai_protected
&& num_inherited_entries(file_ace_list
) == 0 && num_inherited_entries(dir_ace_list
) == 0) {
230 /* Instead just remove the attribute if it exists. */
231 if (fsp
->fh
->fd
!= -1)
232 SMB_VFS_FREMOVEXATTR(fsp
, SAMBA_POSIX_INHERITANCE_EA_NAME
);
234 SMB_VFS_REMOVEXATTR(fsp
->conn
, fsp
->fsp_name
, SAMBA_POSIX_INHERITANCE_EA_NAME
);
238 pai_buf
= create_pai_buf(file_ace_list
, dir_ace_list
, pai_protected
, &store_size
);
240 if (fsp
->fh
->fd
!= -1)
241 ret
= SMB_VFS_FSETXATTR(fsp
, SAMBA_POSIX_INHERITANCE_EA_NAME
,
242 pai_buf
, store_size
, 0);
244 ret
= SMB_VFS_SETXATTR(fsp
->conn
,fsp
->fsp_name
, SAMBA_POSIX_INHERITANCE_EA_NAME
,
245 pai_buf
, store_size
, 0);
249 DEBUG(10,("store_inheritance_attribute:%s for file %s\n", pai_protected
? " (protected)" : "", fsp
->fsp_name
));
250 if (ret
== -1 && !no_acl_syscall_error(errno
))
251 DEBUG(1,("store_inheritance_attribute: Error %s\n", strerror(errno
) ));
254 /************************************************************************
255 Delete the in memory inheritance info.
256 ************************************************************************/
258 static void free_inherited_info(struct pai_val
*pal
)
261 struct pai_entry
*paie
, *paie_next
;
262 for (paie
= pal
->entry_list
; paie
; paie
= paie_next
) {
263 paie_next
= paie
->next
;
266 for (paie
= pal
->def_entry_list
; paie
; paie
= paie_next
) {
267 paie_next
= paie
->next
;
274 /************************************************************************
275 Was this ACL protected ?
276 ************************************************************************/
278 static bool get_protected_flag(struct pai_val
*pal
)
282 return pal
->pai_protected
;
285 /************************************************************************
286 Was this ACE inherited ?
287 ************************************************************************/
289 static bool get_inherited_flag(struct pai_val
*pal
, canon_ace
*ace_entry
, bool default_ace
)
291 struct pai_entry
*paie
;
296 /* If the entry exists it is inherited. */
297 for (paie
= (default_ace
? pal
->def_entry_list
: pal
->entry_list
); paie
; paie
= paie
->next
) {
298 if (ace_entry
->owner_type
== paie
->owner_type
&&
299 get_entry_val(ace_entry
) == get_pai_entry_val(paie
))
305 /************************************************************************
306 Ensure an attribute just read is valid.
307 ************************************************************************/
309 static bool check_pai_ok(char *pai_buf
, size_t pai_buf_data_size
)
312 uint16 num_def_entries
;
314 if (pai_buf_data_size
< PAI_ENTRIES_BASE
) {
315 /* Corrupted - too small. */
319 if (CVAL(pai_buf
,PAI_VERSION_OFFSET
) != PAI_VERSION
)
322 num_entries
= SVAL(pai_buf
,PAI_NUM_ENTRIES_OFFSET
);
323 num_def_entries
= SVAL(pai_buf
,PAI_NUM_DEFAULT_ENTRIES_OFFSET
);
325 /* Check the entry lists match. */
326 /* Each entry is 5 bytes (type plus 4 bytes of uid or gid). */
328 if (((num_entries
+ num_def_entries
)*PAI_ENTRY_LENGTH
) + PAI_ENTRIES_BASE
!= pai_buf_data_size
)
335 /************************************************************************
336 Convert to in-memory format.
337 ************************************************************************/
339 static struct pai_val
*create_pai_val(char *buf
, size_t size
)
342 struct pai_val
*paiv
= NULL
;
345 if (!check_pai_ok(buf
, size
))
348 paiv
= SMB_MALLOC_P(struct pai_val
);
352 memset(paiv
, '\0', sizeof(struct pai_val
));
354 paiv
->pai_protected
= (CVAL(buf
,PAI_FLAG_OFFSET
) == PAI_ACL_FLAG_PROTECTED
);
356 paiv
->num_entries
= SVAL(buf
,PAI_NUM_ENTRIES_OFFSET
);
357 paiv
->num_def_entries
= SVAL(buf
,PAI_NUM_DEFAULT_ENTRIES_OFFSET
);
359 entry_offset
= buf
+ PAI_ENTRIES_BASE
;
361 DEBUG(10,("create_pai_val:%s num_entries = %u, num_def_entries = %u\n",
362 paiv
->pai_protected
? " (pai_protected)" : "", paiv
->num_entries
, paiv
->num_def_entries
));
364 for (i
= 0; i
< paiv
->num_entries
; i
++) {
365 struct pai_entry
*paie
;
367 paie
= SMB_MALLOC_P(struct pai_entry
);
369 free_inherited_info(paiv
);
373 paie
->owner_type
= (enum ace_owner
)CVAL(entry_offset
,0);
374 switch( paie
->owner_type
) {
376 paie
->unix_ug
.uid
= (uid_t
)IVAL(entry_offset
,1);
377 DEBUG(10,("create_pai_val: uid = %u\n", (unsigned int)paie
->unix_ug
.uid
));
380 paie
->unix_ug
.gid
= (gid_t
)IVAL(entry_offset
,1);
381 DEBUG(10,("create_pai_val: gid = %u\n", (unsigned int)paie
->unix_ug
.gid
));
384 paie
->unix_ug
.world
= -1;
385 DEBUG(10,("create_pai_val: world ace\n"));
388 free_inherited_info(paiv
);
391 entry_offset
+= PAI_ENTRY_LENGTH
;
392 DLIST_ADD(paiv
->entry_list
, paie
);
395 for (i
= 0; i
< paiv
->num_def_entries
; i
++) {
396 struct pai_entry
*paie
;
398 paie
= SMB_MALLOC_P(struct pai_entry
);
400 free_inherited_info(paiv
);
404 paie
->owner_type
= (enum ace_owner
)CVAL(entry_offset
,0);
405 switch( paie
->owner_type
) {
407 paie
->unix_ug
.uid
= (uid_t
)IVAL(entry_offset
,1);
408 DEBUG(10,("create_pai_val: (def) uid = %u\n", (unsigned int)paie
->unix_ug
.uid
));
411 paie
->unix_ug
.gid
= (gid_t
)IVAL(entry_offset
,1);
412 DEBUG(10,("create_pai_val: (def) gid = %u\n", (unsigned int)paie
->unix_ug
.gid
));
415 paie
->unix_ug
.world
= -1;
416 DEBUG(10,("create_pai_val: (def) world ace\n"));
419 free_inherited_info(paiv
);
422 entry_offset
+= PAI_ENTRY_LENGTH
;
423 DLIST_ADD(paiv
->def_entry_list
, paie
);
429 /************************************************************************
430 Load the user.SAMBA_PAI attribute.
431 ************************************************************************/
433 static struct pai_val
*fload_inherited_info(files_struct
*fsp
)
436 size_t pai_buf_size
= 1024;
437 struct pai_val
*paiv
= NULL
;
440 if (!lp_map_acl_inherit(SNUM(fsp
->conn
)))
443 if ((pai_buf
= (char *)SMB_MALLOC(pai_buf_size
)) == NULL
)
447 if (fsp
->fh
->fd
!= -1)
448 ret
= SMB_VFS_FGETXATTR(fsp
, SAMBA_POSIX_INHERITANCE_EA_NAME
,
449 pai_buf
, pai_buf_size
);
451 ret
= SMB_VFS_GETXATTR(fsp
->conn
,fsp
->fsp_name
,SAMBA_POSIX_INHERITANCE_EA_NAME
,
452 pai_buf
, pai_buf_size
);
455 if (errno
!= ERANGE
) {
458 /* Buffer too small - enlarge it. */
461 if (pai_buf_size
> 1024*1024) {
462 return NULL
; /* Limit malloc to 1mb. */
464 if ((pai_buf
= (char *)SMB_MALLOC(pai_buf_size
)) == NULL
)
469 DEBUG(10,("load_inherited_info: ret = %lu for file %s\n", (unsigned long)ret
, fsp
->fsp_name
));
472 /* No attribute or not supported. */
474 if (errno
!= ENOATTR
)
475 DEBUG(10,("load_inherited_info: Error %s\n", strerror(errno
) ));
478 DEBUG(10,("load_inherited_info: Error %s\n", strerror(errno
) ));
484 paiv
= create_pai_val(pai_buf
, ret
);
486 if (paiv
&& paiv
->pai_protected
)
487 DEBUG(10,("load_inherited_info: ACL is protected for file %s\n", fsp
->fsp_name
));
493 /************************************************************************
494 Load the user.SAMBA_PAI attribute.
495 ************************************************************************/
497 static struct pai_val
*load_inherited_info(const struct connection_struct
*conn
,
501 size_t pai_buf_size
= 1024;
502 struct pai_val
*paiv
= NULL
;
505 if (!lp_map_acl_inherit(SNUM(conn
))) {
509 if ((pai_buf
= (char *)SMB_MALLOC(pai_buf_size
)) == NULL
) {
514 ret
= SMB_VFS_GETXATTR(conn
, fname
,
515 SAMBA_POSIX_INHERITANCE_EA_NAME
,
516 pai_buf
, pai_buf_size
);
519 if (errno
!= ERANGE
) {
522 /* Buffer too small - enlarge it. */
525 if (pai_buf_size
> 1024*1024) {
526 return NULL
; /* Limit malloc to 1mb. */
528 if ((pai_buf
= (char *)SMB_MALLOC(pai_buf_size
)) == NULL
)
533 DEBUG(10,("load_inherited_info: ret = %lu for file %s\n", (unsigned long)ret
, fname
));
536 /* No attribute or not supported. */
538 if (errno
!= ENOATTR
)
539 DEBUG(10,("load_inherited_info: Error %s\n", strerror(errno
) ));
542 DEBUG(10,("load_inherited_info: Error %s\n", strerror(errno
) ));
548 paiv
= create_pai_val(pai_buf
, ret
);
550 if (paiv
&& paiv
->pai_protected
) {
551 DEBUG(10,("load_inherited_info: ACL is protected for file %s\n", fname
));
558 /****************************************************************************
559 Functions to manipulate the internal ACE format.
560 ****************************************************************************/
562 /****************************************************************************
563 Count a linked list of canonical ACE entries.
564 ****************************************************************************/
566 static size_t count_canon_ace_list( canon_ace
*list_head
)
571 for (ace
= list_head
; ace
; ace
= ace
->next
)
577 /****************************************************************************
578 Free a linked list of canonical ACE entries.
579 ****************************************************************************/
581 static void free_canon_ace_list( canon_ace
*list_head
)
583 canon_ace
*list
, *next
;
585 for (list
= list_head
; list
; list
= next
) {
587 DLIST_REMOVE(list_head
, list
);
592 /****************************************************************************
593 Function to duplicate a canon_ace entry.
594 ****************************************************************************/
596 static canon_ace
*dup_canon_ace( canon_ace
*src_ace
)
598 canon_ace
*dst_ace
= SMB_MALLOC_P(canon_ace
);
604 dst_ace
->prev
= dst_ace
->next
= NULL
;
608 /****************************************************************************
609 Print out a canon ace.
610 ****************************************************************************/
612 static void print_canon_ace(canon_ace
*pace
, int num
)
614 dbgtext( "canon_ace index %d. Type = %s ", num
, pace
->attr
== ALLOW_ACE
? "allow" : "deny" );
615 dbgtext( "SID = %s ", sid_string_dbg(&pace
->trustee
));
616 if (pace
->owner_type
== UID_ACE
) {
617 const char *u_name
= uidtoname(pace
->unix_ug
.uid
);
618 dbgtext( "uid %u (%s) ", (unsigned int)pace
->unix_ug
.uid
, u_name
);
619 } else if (pace
->owner_type
== GID_ACE
) {
620 char *g_name
= gidtoname(pace
->unix_ug
.gid
);
621 dbgtext( "gid %u (%s) ", (unsigned int)pace
->unix_ug
.gid
, g_name
);
624 switch (pace
->type
) {
626 dbgtext( "SMB_ACL_USER ");
628 case SMB_ACL_USER_OBJ
:
629 dbgtext( "SMB_ACL_USER_OBJ ");
632 dbgtext( "SMB_ACL_GROUP ");
634 case SMB_ACL_GROUP_OBJ
:
635 dbgtext( "SMB_ACL_GROUP_OBJ ");
638 dbgtext( "SMB_ACL_OTHER ");
645 dbgtext( "(inherited) ");
647 dbgtext( "%c", pace
->perms
& S_IRUSR
? 'r' : '-');
648 dbgtext( "%c", pace
->perms
& S_IWUSR
? 'w' : '-');
649 dbgtext( "%c\n", pace
->perms
& S_IXUSR
? 'x' : '-');
652 /****************************************************************************
653 Print out a canon ace list.
654 ****************************************************************************/
656 static void print_canon_ace_list(const char *name
, canon_ace
*ace_list
)
660 if( DEBUGLVL( 10 )) {
661 dbgtext( "print_canon_ace_list: %s\n", name
);
662 for (;ace_list
; ace_list
= ace_list
->next
, count
++)
663 print_canon_ace(ace_list
, count
);
667 /****************************************************************************
668 Map POSIX ACL perms to canon_ace permissions (a mode_t containing only S_(R|W|X)USR bits).
669 ****************************************************************************/
671 static mode_t
convert_permset_to_mode_t(connection_struct
*conn
, SMB_ACL_PERMSET_T permset
)
675 ret
|= (SMB_VFS_SYS_ACL_GET_PERM(conn
, permset
, SMB_ACL_READ
) ? S_IRUSR
: 0);
676 ret
|= (SMB_VFS_SYS_ACL_GET_PERM(conn
, permset
, SMB_ACL_WRITE
) ? S_IWUSR
: 0);
677 ret
|= (SMB_VFS_SYS_ACL_GET_PERM(conn
, permset
, SMB_ACL_EXECUTE
) ? S_IXUSR
: 0);
682 /****************************************************************************
683 Map generic UNIX permissions to canon_ace permissions (a mode_t containing only S_(R|W|X)USR bits).
684 ****************************************************************************/
686 static mode_t
unix_perms_to_acl_perms(mode_t mode
, int r_mask
, int w_mask
, int x_mask
)
700 /****************************************************************************
701 Map canon_ace permissions (a mode_t containing only S_(R|W|X)USR bits) to
702 an SMB_ACL_PERMSET_T.
703 ****************************************************************************/
705 static int map_acl_perms_to_permset(connection_struct
*conn
, mode_t mode
, SMB_ACL_PERMSET_T
*p_permset
)
707 if (SMB_VFS_SYS_ACL_CLEAR_PERMS(conn
, *p_permset
) == -1)
709 if (mode
& S_IRUSR
) {
710 if (SMB_VFS_SYS_ACL_ADD_PERM(conn
, *p_permset
, SMB_ACL_READ
) == -1)
713 if (mode
& S_IWUSR
) {
714 if (SMB_VFS_SYS_ACL_ADD_PERM(conn
, *p_permset
, SMB_ACL_WRITE
) == -1)
717 if (mode
& S_IXUSR
) {
718 if (SMB_VFS_SYS_ACL_ADD_PERM(conn
, *p_permset
, SMB_ACL_EXECUTE
) == -1)
724 /****************************************************************************
725 Function to create owner and group SIDs from a SMB_STRUCT_STAT.
726 ****************************************************************************/
728 static void create_file_sids(const SMB_STRUCT_STAT
*psbuf
, DOM_SID
*powner_sid
, DOM_SID
*pgroup_sid
)
730 uid_to_sid( powner_sid
, psbuf
->st_uid
);
731 gid_to_sid( pgroup_sid
, psbuf
->st_gid
);
734 /****************************************************************************
735 Is the identity in two ACEs equal ? Check both SID and uid/gid.
736 ****************************************************************************/
738 static bool identity_in_ace_equal(canon_ace
*ace1
, canon_ace
*ace2
)
740 if (sid_equal(&ace1
->trustee
, &ace2
->trustee
)) {
743 if (ace1
->owner_type
== ace2
->owner_type
) {
744 if (ace1
->owner_type
== UID_ACE
&&
745 ace1
->unix_ug
.uid
== ace2
->unix_ug
.uid
) {
747 } else if (ace1
->owner_type
== GID_ACE
&&
748 ace1
->unix_ug
.gid
== ace2
->unix_ug
.gid
) {
755 /****************************************************************************
756 Merge aces with a common sid - if both are allow or deny, OR the permissions together and
757 delete the second one. If the first is deny, mask the permissions off and delete the allow
758 if the permissions become zero, delete the deny if the permissions are non zero.
759 ****************************************************************************/
761 static void merge_aces( canon_ace
**pp_list_head
)
763 canon_ace
*list_head
= *pp_list_head
;
764 canon_ace
*curr_ace_outer
;
765 canon_ace
*curr_ace_outer_next
;
768 * First, merge allow entries with identical SIDs, and deny entries
769 * with identical SIDs.
772 for (curr_ace_outer
= list_head
; curr_ace_outer
; curr_ace_outer
= curr_ace_outer_next
) {
774 canon_ace
*curr_ace_next
;
776 curr_ace_outer_next
= curr_ace_outer
->next
; /* Save the link in case we delete. */
778 for (curr_ace
= curr_ace_outer
->next
; curr_ace
; curr_ace
= curr_ace_next
) {
780 curr_ace_next
= curr_ace
->next
; /* Save the link in case of delete. */
782 if (identity_in_ace_equal(curr_ace
, curr_ace_outer
) &&
783 (curr_ace
->attr
== curr_ace_outer
->attr
)) {
785 if( DEBUGLVL( 10 )) {
786 dbgtext("merge_aces: Merging ACE's\n");
787 print_canon_ace( curr_ace_outer
, 0);
788 print_canon_ace( curr_ace
, 0);
791 /* Merge two allow or two deny ACE's. */
793 curr_ace_outer
->perms
|= curr_ace
->perms
;
794 DLIST_REMOVE(list_head
, curr_ace
);
796 curr_ace_outer_next
= curr_ace_outer
->next
; /* We may have deleted the link. */
802 * Now go through and mask off allow permissions with deny permissions.
803 * We can delete either the allow or deny here as we know that each SID
804 * appears only once in the list.
807 for (curr_ace_outer
= list_head
; curr_ace_outer
; curr_ace_outer
= curr_ace_outer_next
) {
809 canon_ace
*curr_ace_next
;
811 curr_ace_outer_next
= curr_ace_outer
->next
; /* Save the link in case we delete. */
813 for (curr_ace
= curr_ace_outer
->next
; curr_ace
; curr_ace
= curr_ace_next
) {
815 curr_ace_next
= curr_ace
->next
; /* Save the link in case of delete. */
818 * Subtract ACE's with different entries. Due to the ordering constraints
819 * we've put on the ACL, we know the deny must be the first one.
822 if (identity_in_ace_equal(curr_ace
, curr_ace_outer
) &&
823 (curr_ace_outer
->attr
== DENY_ACE
) && (curr_ace
->attr
== ALLOW_ACE
)) {
825 if( DEBUGLVL( 10 )) {
826 dbgtext("merge_aces: Masking ACE's\n");
827 print_canon_ace( curr_ace_outer
, 0);
828 print_canon_ace( curr_ace
, 0);
831 curr_ace
->perms
&= ~curr_ace_outer
->perms
;
833 if (curr_ace
->perms
== 0) {
836 * The deny overrides the allow. Remove the allow.
839 DLIST_REMOVE(list_head
, curr_ace
);
841 curr_ace_outer_next
= curr_ace_outer
->next
; /* We may have deleted the link. */
846 * Even after removing permissions, there
847 * are still allow permissions - delete the deny.
848 * It is safe to delete the deny here,
849 * as we are guarenteed by the deny first
850 * ordering that all the deny entries for
851 * this SID have already been merged into one
852 * before we can get to an allow ace.
855 DLIST_REMOVE(list_head
, curr_ace_outer
);
856 SAFE_FREE(curr_ace_outer
);
861 } /* end for curr_ace */
862 } /* end for curr_ace_outer */
864 /* We may have modified the list. */
866 *pp_list_head
= list_head
;
869 /****************************************************************************
870 Check if we need to return NT4.x compatible ACL entries.
871 ****************************************************************************/
873 static bool nt4_compatible_acls(void)
875 int compat
= lp_acl_compatibility();
877 if (compat
== ACL_COMPAT_AUTO
) {
878 enum remote_arch_types ra_type
= get_remote_arch();
880 /* Automatically adapt to client */
881 return (ra_type
<= RA_WINNT
);
883 return (compat
== ACL_COMPAT_WINNT
);
887 /****************************************************************************
888 Map canon_ace perms to permission bits NT.
889 The attr element is not used here - we only process deny entries on set,
890 not get. Deny entries are implicit on get with ace->perms = 0.
891 ****************************************************************************/
893 static uint32_t map_canon_ace_perms(int snum
,
894 enum security_ace_type
*pacl_type
,
898 uint32_t nt_mask
= 0;
900 *pacl_type
= SEC_ACE_TYPE_ACCESS_ALLOWED
;
902 if (lp_acl_map_full_control(snum
) && ((perms
& ALL_ACE_PERMS
) == ALL_ACE_PERMS
)) {
904 nt_mask
= UNIX_DIRECTORY_ACCESS_RWX
;
906 nt_mask
= (UNIX_ACCESS_RWX
& ~DELETE_ACCESS
);
908 } else if ((perms
& ALL_ACE_PERMS
) == (mode_t
)0) {
910 * Windows NT refuses to display ACEs with no permissions in them (but
911 * they are perfectly legal with Windows 2000). If the ACE has empty
912 * permissions we cannot use 0, so we use the otherwise unused
913 * WRITE_OWNER permission, which we ignore when we set an ACL.
914 * We abstract this into a #define of UNIX_ACCESS_NONE to allow this
915 * to be changed in the future.
918 if (nt4_compatible_acls())
919 nt_mask
= UNIX_ACCESS_NONE
;
924 nt_mask
|= ((perms
& S_IRUSR
) ? UNIX_DIRECTORY_ACCESS_R
: 0 );
925 nt_mask
|= ((perms
& S_IWUSR
) ? UNIX_DIRECTORY_ACCESS_W
: 0 );
926 nt_mask
|= ((perms
& S_IXUSR
) ? UNIX_DIRECTORY_ACCESS_X
: 0 );
928 nt_mask
|= ((perms
& S_IRUSR
) ? UNIX_ACCESS_R
: 0 );
929 nt_mask
|= ((perms
& S_IWUSR
) ? UNIX_ACCESS_W
: 0 );
930 nt_mask
|= ((perms
& S_IXUSR
) ? UNIX_ACCESS_X
: 0 );
934 DEBUG(10,("map_canon_ace_perms: Mapped (UNIX) %x to (NT) %x\n",
935 (unsigned int)perms
, (unsigned int)nt_mask
));
940 /****************************************************************************
941 Map NT perms to a UNIX mode_t.
942 ****************************************************************************/
944 #define FILE_SPECIFIC_READ_BITS (FILE_READ_DATA|FILE_READ_EA|FILE_READ_ATTRIBUTES)
945 #define FILE_SPECIFIC_WRITE_BITS (FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_WRITE_EA|FILE_WRITE_ATTRIBUTES)
946 #define FILE_SPECIFIC_EXECUTE_BITS (FILE_EXECUTE)
948 static mode_t
map_nt_perms( uint32
*mask
, int type
)
954 if((*mask
) & GENERIC_ALL_ACCESS
)
955 mode
= S_IRUSR
|S_IWUSR
|S_IXUSR
;
957 mode
|= ((*mask
) & (GENERIC_READ_ACCESS
|FILE_SPECIFIC_READ_BITS
)) ? S_IRUSR
: 0;
958 mode
|= ((*mask
) & (GENERIC_WRITE_ACCESS
|FILE_SPECIFIC_WRITE_BITS
)) ? S_IWUSR
: 0;
959 mode
|= ((*mask
) & (GENERIC_EXECUTE_ACCESS
|FILE_SPECIFIC_EXECUTE_BITS
)) ? S_IXUSR
: 0;
963 if((*mask
) & GENERIC_ALL_ACCESS
)
964 mode
= S_IRGRP
|S_IWGRP
|S_IXGRP
;
966 mode
|= ((*mask
) & (GENERIC_READ_ACCESS
|FILE_SPECIFIC_READ_BITS
)) ? S_IRGRP
: 0;
967 mode
|= ((*mask
) & (GENERIC_WRITE_ACCESS
|FILE_SPECIFIC_WRITE_BITS
)) ? S_IWGRP
: 0;
968 mode
|= ((*mask
) & (GENERIC_EXECUTE_ACCESS
|FILE_SPECIFIC_EXECUTE_BITS
)) ? S_IXGRP
: 0;
972 if((*mask
) & GENERIC_ALL_ACCESS
)
973 mode
= S_IROTH
|S_IWOTH
|S_IXOTH
;
975 mode
|= ((*mask
) & (GENERIC_READ_ACCESS
|FILE_SPECIFIC_READ_BITS
)) ? S_IROTH
: 0;
976 mode
|= ((*mask
) & (GENERIC_WRITE_ACCESS
|FILE_SPECIFIC_WRITE_BITS
)) ? S_IWOTH
: 0;
977 mode
|= ((*mask
) & (GENERIC_EXECUTE_ACCESS
|FILE_SPECIFIC_EXECUTE_BITS
)) ? S_IXOTH
: 0;
985 /****************************************************************************
986 Unpack a SEC_DESC into a UNIX owner and group.
987 ****************************************************************************/
989 NTSTATUS
unpack_nt_owners(int snum
, uid_t
*puser
, gid_t
*pgrp
, uint32 security_info_sent
, const SEC_DESC
*psd
)
997 if(security_info_sent
== 0) {
998 DEBUG(0,("unpack_nt_owners: no security info sent !\n"));
1003 * Validate the owner and group SID's.
1006 memset(&owner_sid
, '\0', sizeof(owner_sid
));
1007 memset(&grp_sid
, '\0', sizeof(grp_sid
));
1009 DEBUG(5,("unpack_nt_owners: validating owner_sids.\n"));
1012 * Don't immediately fail if the owner sid cannot be validated.
1013 * This may be a group chown only set.
1016 if (security_info_sent
& OWNER_SECURITY_INFORMATION
) {
1017 sid_copy(&owner_sid
, psd
->owner_sid
);
1018 if (!sid_to_uid(&owner_sid
, puser
)) {
1019 if (lp_force_unknown_acl_user(snum
)) {
1020 /* this allows take ownership to work
1022 *puser
= current_user
.ut
.uid
;
1024 DEBUG(3,("unpack_nt_owners: unable to validate"
1025 " owner sid for %s\n",
1026 sid_string_dbg(&owner_sid
)));
1027 return NT_STATUS_INVALID_OWNER
;
1030 DEBUG(3,("unpack_nt_owners: owner sid mapped to uid %u\n",
1031 (unsigned int)*puser
));
1035 * Don't immediately fail if the group sid cannot be validated.
1036 * This may be an owner chown only set.
1039 if (security_info_sent
& GROUP_SECURITY_INFORMATION
) {
1040 sid_copy(&grp_sid
, psd
->group_sid
);
1041 if (!sid_to_gid( &grp_sid
, pgrp
)) {
1042 if (lp_force_unknown_acl_user(snum
)) {
1043 /* this allows take group ownership to work
1045 *pgrp
= current_user
.ut
.gid
;
1047 DEBUG(3,("unpack_nt_owners: unable to validate"
1049 return NT_STATUS_INVALID_OWNER
;
1052 DEBUG(3,("unpack_nt_owners: group sid mapped to gid %u\n",
1053 (unsigned int)*pgrp
));
1056 DEBUG(5,("unpack_nt_owners: owner_sids validated.\n"));
1058 return NT_STATUS_OK
;
1061 /****************************************************************************
1062 Ensure the enforced permissions for this share apply.
1063 ****************************************************************************/
1065 static void apply_default_perms(const struct share_params
*params
,
1066 const bool is_directory
, canon_ace
*pace
,
1069 mode_t and_bits
= (mode_t
)0;
1070 mode_t or_bits
= (mode_t
)0;
1072 /* Get the initial bits to apply. */
1075 and_bits
= lp_dir_security_mask(params
->service
);
1076 or_bits
= lp_force_dir_security_mode(params
->service
);
1078 and_bits
= lp_security_mask(params
->service
);
1079 or_bits
= lp_force_security_mode(params
->service
);
1082 /* Now bounce them into the S_USR space. */
1085 /* Ensure owner has read access. */
1086 pace
->perms
|= S_IRUSR
;
1088 pace
->perms
|= (S_IWUSR
|S_IXUSR
);
1089 and_bits
= unix_perms_to_acl_perms(and_bits
, S_IRUSR
, S_IWUSR
, S_IXUSR
);
1090 or_bits
= unix_perms_to_acl_perms(or_bits
, S_IRUSR
, S_IWUSR
, S_IXUSR
);
1093 and_bits
= unix_perms_to_acl_perms(and_bits
, S_IRGRP
, S_IWGRP
, S_IXGRP
);
1094 or_bits
= unix_perms_to_acl_perms(or_bits
, S_IRGRP
, S_IWGRP
, S_IXGRP
);
1097 and_bits
= unix_perms_to_acl_perms(and_bits
, S_IROTH
, S_IWOTH
, S_IXOTH
);
1098 or_bits
= unix_perms_to_acl_perms(or_bits
, S_IROTH
, S_IWOTH
, S_IXOTH
);
1102 pace
->perms
= ((pace
->perms
& and_bits
)|or_bits
);
1105 /****************************************************************************
1106 Check if a given uid/SID is in a group gid/SID. This is probably very
1107 expensive and will need optimisation. A *lot* of optimisation :-). JRA.
1108 ****************************************************************************/
1110 static bool uid_entry_in_group( canon_ace
*uid_ace
, canon_ace
*group_ace
)
1112 const char *u_name
= NULL
;
1114 /* "Everyone" always matches every uid. */
1116 if (sid_equal(&group_ace
->trustee
, &global_sid_World
))
1119 /* Assume that the current user is in the current group (force group) */
1121 if (uid_ace
->unix_ug
.uid
== current_user
.ut
.uid
&& group_ace
->unix_ug
.gid
== current_user
.ut
.gid
)
1124 /* u_name talloc'ed off tos. */
1125 u_name
= uidtoname(uid_ace
->unix_ug
.uid
);
1129 return user_in_group_sid(u_name
, &group_ace
->trustee
);
1132 /****************************************************************************
1133 A well formed POSIX file or default ACL has at least 3 entries, a
1134 SMB_ACL_USER_OBJ, SMB_ACL_GROUP_OBJ, SMB_ACL_OTHER_OBJ.
1135 In addition, the owner must always have at least read access.
1136 When using this call on get_acl, the pst struct is valid and contains
1137 the mode of the file. When using this call on set_acl, the pst struct has
1138 been modified to have a mode containing the default for this file or directory
1140 ****************************************************************************/
1142 static bool ensure_canon_entry_valid(canon_ace
**pp_ace
,
1143 const struct share_params
*params
,
1144 const bool is_directory
,
1145 const DOM_SID
*pfile_owner_sid
,
1146 const DOM_SID
*pfile_grp_sid
,
1147 const SMB_STRUCT_STAT
*pst
,
1151 bool got_user
= False
;
1152 bool got_grp
= False
;
1153 bool got_other
= False
;
1154 canon_ace
*pace_other
= NULL
;
1156 for (pace
= *pp_ace
; pace
; pace
= pace
->next
) {
1157 if (pace
->type
== SMB_ACL_USER_OBJ
) {
1160 apply_default_perms(params
, is_directory
, pace
, S_IRUSR
);
1163 } else if (pace
->type
== SMB_ACL_GROUP_OBJ
) {
1166 * Ensure create mask/force create mode is respected on set.
1170 apply_default_perms(params
, is_directory
, pace
, S_IRGRP
);
1173 } else if (pace
->type
== SMB_ACL_OTHER
) {
1176 * Ensure create mask/force create mode is respected on set.
1180 apply_default_perms(params
, is_directory
, pace
, S_IROTH
);
1187 if ((pace
= SMB_MALLOC_P(canon_ace
)) == NULL
) {
1188 DEBUG(0,("ensure_canon_entry_valid: malloc fail.\n"));
1193 pace
->type
= SMB_ACL_USER_OBJ
;
1194 pace
->owner_type
= UID_ACE
;
1195 pace
->unix_ug
.uid
= pst
->st_uid
;
1196 pace
->trustee
= *pfile_owner_sid
;
1197 pace
->attr
= ALLOW_ACE
;
1200 /* See if the owning user is in any of the other groups in
1201 the ACE. If so, OR in the permissions from that group. */
1203 bool group_matched
= False
;
1204 canon_ace
*pace_iter
;
1206 for (pace_iter
= *pp_ace
; pace_iter
; pace_iter
= pace_iter
->next
) {
1207 if (pace_iter
->type
== SMB_ACL_GROUP_OBJ
|| pace_iter
->type
== SMB_ACL_GROUP
) {
1208 if (uid_entry_in_group(pace
, pace_iter
)) {
1209 pace
->perms
|= pace_iter
->perms
;
1210 group_matched
= True
;
1215 /* If we only got an "everyone" perm, just use that. */
1216 if (!group_matched
) {
1218 pace
->perms
= pace_other
->perms
;
1223 apply_default_perms(params
, is_directory
, pace
, S_IRUSR
);
1225 pace
->perms
= unix_perms_to_acl_perms(pst
->st_mode
, S_IRUSR
, S_IWUSR
, S_IXUSR
);
1228 DLIST_ADD(*pp_ace
, pace
);
1232 if ((pace
= SMB_MALLOC_P(canon_ace
)) == NULL
) {
1233 DEBUG(0,("ensure_canon_entry_valid: malloc fail.\n"));
1238 pace
->type
= SMB_ACL_GROUP_OBJ
;
1239 pace
->owner_type
= GID_ACE
;
1240 pace
->unix_ug
.uid
= pst
->st_gid
;
1241 pace
->trustee
= *pfile_grp_sid
;
1242 pace
->attr
= ALLOW_ACE
;
1244 /* If we only got an "everyone" perm, just use that. */
1246 pace
->perms
= pace_other
->perms
;
1249 apply_default_perms(params
, is_directory
, pace
, S_IRGRP
);
1251 pace
->perms
= unix_perms_to_acl_perms(pst
->st_mode
, S_IRGRP
, S_IWGRP
, S_IXGRP
);
1254 DLIST_ADD(*pp_ace
, pace
);
1258 if ((pace
= SMB_MALLOC_P(canon_ace
)) == NULL
) {
1259 DEBUG(0,("ensure_canon_entry_valid: malloc fail.\n"));
1264 pace
->type
= SMB_ACL_OTHER
;
1265 pace
->owner_type
= WORLD_ACE
;
1266 pace
->unix_ug
.world
= -1;
1267 pace
->trustee
= global_sid_World
;
1268 pace
->attr
= ALLOW_ACE
;
1271 apply_default_perms(params
, is_directory
, pace
, S_IROTH
);
1273 pace
->perms
= unix_perms_to_acl_perms(pst
->st_mode
, S_IROTH
, S_IWOTH
, S_IXOTH
);
1275 DLIST_ADD(*pp_ace
, pace
);
1281 /****************************************************************************
1282 Check if a POSIX ACL has the required SMB_ACL_USER_OBJ and SMB_ACL_GROUP_OBJ entries.
1283 If it does not have them, check if there are any entries where the trustee is the
1284 file owner or the owning group, and map these to SMB_ACL_USER_OBJ and SMB_ACL_GROUP_OBJ.
1285 ****************************************************************************/
1287 static void check_owning_objs(canon_ace
*ace
, DOM_SID
*pfile_owner_sid
, DOM_SID
*pfile_grp_sid
)
1289 bool got_user_obj
, got_group_obj
;
1290 canon_ace
*current_ace
;
1293 entries
= count_canon_ace_list(ace
);
1294 got_user_obj
= False
;
1295 got_group_obj
= False
;
1297 for (i
=0, current_ace
= ace
; i
< entries
; i
++, current_ace
= current_ace
->next
) {
1298 if (current_ace
->type
== SMB_ACL_USER_OBJ
)
1299 got_user_obj
= True
;
1300 else if (current_ace
->type
== SMB_ACL_GROUP_OBJ
)
1301 got_group_obj
= True
;
1303 if (got_user_obj
&& got_group_obj
) {
1304 DEBUG(10,("check_owning_objs: ACL had owning user/group entries.\n"));
1308 for (i
=0, current_ace
= ace
; i
< entries
; i
++, current_ace
= current_ace
->next
) {
1309 if (!got_user_obj
&& current_ace
->owner_type
== UID_ACE
&&
1310 sid_equal(¤t_ace
->trustee
, pfile_owner_sid
)) {
1311 current_ace
->type
= SMB_ACL_USER_OBJ
;
1312 got_user_obj
= True
;
1314 if (!got_group_obj
&& current_ace
->owner_type
== GID_ACE
&&
1315 sid_equal(¤t_ace
->trustee
, pfile_grp_sid
)) {
1316 current_ace
->type
= SMB_ACL_GROUP_OBJ
;
1317 got_group_obj
= True
;
1321 DEBUG(10,("check_owning_objs: ACL is missing an owner entry.\n"));
1323 DEBUG(10,("check_owning_objs: ACL is missing an owning group entry.\n"));
1326 /****************************************************************************
1327 Unpack a SEC_DESC into two canonical ace lists.
1328 ****************************************************************************/
1330 static bool create_canon_ace_lists(files_struct
*fsp
,
1331 SMB_STRUCT_STAT
*pst
,
1332 DOM_SID
*pfile_owner_sid
,
1333 DOM_SID
*pfile_grp_sid
,
1334 canon_ace
**ppfile_ace
,
1335 canon_ace
**ppdir_ace
,
1336 const SEC_ACL
*dacl
)
1338 bool all_aces_are_inherit_only
= (fsp
->is_directory
? True
: False
);
1339 canon_ace
*file_ace
= NULL
;
1340 canon_ace
*dir_ace
= NULL
;
1341 canon_ace
*current_ace
= NULL
;
1342 bool got_dir_allow
= False
;
1343 bool got_file_allow
= False
;
1350 * Convert the incoming ACL into a more regular form.
1353 for(i
= 0; i
< dacl
->num_aces
; i
++) {
1354 SEC_ACE
*psa
= &dacl
->aces
[i
];
1356 if((psa
->type
!= SEC_ACE_TYPE_ACCESS_ALLOWED
) && (psa
->type
!= SEC_ACE_TYPE_ACCESS_DENIED
)) {
1357 DEBUG(3,("create_canon_ace_lists: unable to set anything but an ALLOW or DENY ACE.\n"));
1361 if (nt4_compatible_acls()) {
1363 * The security mask may be UNIX_ACCESS_NONE which should map into
1364 * no permissions (we overload the WRITE_OWNER bit for this) or it
1365 * should be one of the ALL/EXECUTE/READ/WRITE bits. Arrange for this
1366 * to be so. Any other bits override the UNIX_ACCESS_NONE bit.
1370 * Convert GENERIC bits to specific bits.
1373 se_map_generic(&psa
->access_mask
, &file_generic_mapping
);
1375 psa
->access_mask
&= (UNIX_ACCESS_NONE
|FILE_ALL_ACCESS
);
1377 if(psa
->access_mask
!= UNIX_ACCESS_NONE
)
1378 psa
->access_mask
&= ~UNIX_ACCESS_NONE
;
1383 * Deal with the fact that NT 4.x re-writes the canonical format
1384 * that we return for default ACLs. If a directory ACE is identical
1385 * to a inherited directory ACE then NT changes the bits so that the
1386 * first ACE is set to OI|IO and the second ACE for this SID is set
1387 * to CI. We need to repair this. JRA.
1390 for(i
= 0; i
< dacl
->num_aces
; i
++) {
1391 SEC_ACE
*psa1
= &dacl
->aces
[i
];
1393 for (j
= i
+ 1; j
< dacl
->num_aces
; j
++) {
1394 SEC_ACE
*psa2
= &dacl
->aces
[j
];
1396 if (psa1
->access_mask
!= psa2
->access_mask
)
1399 if (!sid_equal(&psa1
->trustee
, &psa2
->trustee
))
1403 * Ok - permission bits and SIDs are equal.
1404 * Check if flags were re-written.
1407 if (psa1
->flags
& SEC_ACE_FLAG_INHERIT_ONLY
) {
1409 psa1
->flags
|= (psa2
->flags
& (SEC_ACE_FLAG_CONTAINER_INHERIT
|SEC_ACE_FLAG_OBJECT_INHERIT
));
1410 psa2
->flags
&= ~(SEC_ACE_FLAG_CONTAINER_INHERIT
|SEC_ACE_FLAG_OBJECT_INHERIT
);
1412 } else if (psa2
->flags
& SEC_ACE_FLAG_INHERIT_ONLY
) {
1414 psa2
->flags
|= (psa1
->flags
& (SEC_ACE_FLAG_CONTAINER_INHERIT
|SEC_ACE_FLAG_OBJECT_INHERIT
));
1415 psa1
->flags
&= ~(SEC_ACE_FLAG_CONTAINER_INHERIT
|SEC_ACE_FLAG_OBJECT_INHERIT
);
1421 for(i
= 0; i
< dacl
->num_aces
; i
++) {
1422 SEC_ACE
*psa
= &dacl
->aces
[i
];
1425 * Create a cannon_ace entry representing this NT DACL ACE.
1428 if ((current_ace
= SMB_MALLOC_P(canon_ace
)) == NULL
) {
1429 free_canon_ace_list(file_ace
);
1430 free_canon_ace_list(dir_ace
);
1431 DEBUG(0,("create_canon_ace_lists: malloc fail.\n"));
1435 ZERO_STRUCTP(current_ace
);
1437 sid_copy(¤t_ace
->trustee
, &psa
->trustee
);
1440 * Try and work out if the SID is a user or group
1441 * as we need to flag these differently for POSIX.
1442 * Note what kind of a POSIX ACL this should map to.
1445 if( sid_equal(¤t_ace
->trustee
, &global_sid_World
)) {
1446 current_ace
->owner_type
= WORLD_ACE
;
1447 current_ace
->unix_ug
.world
= -1;
1448 current_ace
->type
= SMB_ACL_OTHER
;
1449 } else if (sid_equal(¤t_ace
->trustee
, &global_sid_Creator_Owner
)) {
1450 current_ace
->owner_type
= UID_ACE
;
1451 current_ace
->unix_ug
.uid
= pst
->st_uid
;
1452 current_ace
->type
= SMB_ACL_USER_OBJ
;
1455 * The Creator Owner entry only specifies inheritable permissions,
1456 * never access permissions. WinNT doesn't always set the ACE to
1457 *INHERIT_ONLY, though.
1460 if (nt4_compatible_acls())
1461 psa
->flags
|= SEC_ACE_FLAG_INHERIT_ONLY
;
1462 } else if (sid_equal(¤t_ace
->trustee
, &global_sid_Creator_Group
)) {
1463 current_ace
->owner_type
= GID_ACE
;
1464 current_ace
->unix_ug
.gid
= pst
->st_gid
;
1465 current_ace
->type
= SMB_ACL_GROUP_OBJ
;
1468 * The Creator Group entry only specifies inheritable permissions,
1469 * never access permissions. WinNT doesn't always set the ACE to
1470 *INHERIT_ONLY, though.
1472 if (nt4_compatible_acls())
1473 psa
->flags
|= SEC_ACE_FLAG_INHERIT_ONLY
;
1475 } else if (sid_to_uid( ¤t_ace
->trustee
, ¤t_ace
->unix_ug
.uid
)) {
1476 current_ace
->owner_type
= UID_ACE
;
1477 /* If it's the owning user, this is a user_obj, not
1479 if (current_ace
->unix_ug
.uid
== pst
->st_uid
) {
1480 current_ace
->type
= SMB_ACL_USER_OBJ
;
1482 current_ace
->type
= SMB_ACL_USER
;
1484 } else if (sid_to_gid( ¤t_ace
->trustee
, ¤t_ace
->unix_ug
.gid
)) {
1485 current_ace
->owner_type
= GID_ACE
;
1486 /* If it's the primary group, this is a group_obj, not
1488 if (current_ace
->unix_ug
.gid
== pst
->st_gid
) {
1489 current_ace
->type
= SMB_ACL_GROUP_OBJ
;
1491 current_ace
->type
= SMB_ACL_GROUP
;
1495 * Silently ignore map failures in non-mappable SIDs (NT Authority, BUILTIN etc).
1498 if (non_mappable_sid(&psa
->trustee
)) {
1499 DEBUG(10, ("create_canon_ace_lists: ignoring "
1500 "non-mappable SID %s\n",
1501 sid_string_dbg(&psa
->trustee
)));
1502 SAFE_FREE(current_ace
);
1506 free_canon_ace_list(file_ace
);
1507 free_canon_ace_list(dir_ace
);
1508 DEBUG(0, ("create_canon_ace_lists: unable to map SID "
1509 "%s to uid or gid.\n",
1510 sid_string_dbg(¤t_ace
->trustee
)));
1511 SAFE_FREE(current_ace
);
1516 * Map the given NT permissions into a UNIX mode_t containing only
1517 * S_I(R|W|X)USR bits.
1520 current_ace
->perms
|= map_nt_perms( &psa
->access_mask
, S_IRUSR
);
1521 current_ace
->attr
= (psa
->type
== SEC_ACE_TYPE_ACCESS_ALLOWED
) ? ALLOW_ACE
: DENY_ACE
;
1522 current_ace
->inherited
= ((psa
->flags
& SEC_ACE_FLAG_INHERITED_ACE
) ? True
: False
);
1525 * Now add the created ace to either the file list, the directory
1526 * list, or both. We *MUST* preserve the order here (hence we use
1527 * DLIST_ADD_END) as NT ACLs are order dependent.
1530 if (fsp
->is_directory
) {
1533 * We can only add to the default POSIX ACE list if the ACE is
1534 * designed to be inherited by both files and directories.
1537 if ((psa
->flags
& (SEC_ACE_FLAG_OBJECT_INHERIT
|SEC_ACE_FLAG_CONTAINER_INHERIT
)) ==
1538 (SEC_ACE_FLAG_OBJECT_INHERIT
|SEC_ACE_FLAG_CONTAINER_INHERIT
)) {
1540 DLIST_ADD_END(dir_ace
, current_ace
, canon_ace
*);
1543 * Note if this was an allow ace. We can't process
1544 * any further deny ace's after this.
1547 if (current_ace
->attr
== ALLOW_ACE
)
1548 got_dir_allow
= True
;
1550 if ((current_ace
->attr
== DENY_ACE
) && got_dir_allow
) {
1551 DEBUG(0,("create_canon_ace_lists: malformed ACL in inheritable ACL ! \
1552 Deny entry after Allow entry. Failing to set on file %s.\n", fsp
->fsp_name
));
1553 free_canon_ace_list(file_ace
);
1554 free_canon_ace_list(dir_ace
);
1558 if( DEBUGLVL( 10 )) {
1559 dbgtext("create_canon_ace_lists: adding dir ACL:\n");
1560 print_canon_ace( current_ace
, 0);
1564 * If this is not an inherit only ACE we need to add a duplicate
1568 if (!(psa
->flags
& SEC_ACE_FLAG_INHERIT_ONLY
)) {
1569 canon_ace
*dup_ace
= dup_canon_ace(current_ace
);
1572 DEBUG(0,("create_canon_ace_lists: malloc fail !\n"));
1573 free_canon_ace_list(file_ace
);
1574 free_canon_ace_list(dir_ace
);
1579 * We must not free current_ace here as its
1580 * pointer is now owned by the dir_ace list.
1582 current_ace
= dup_ace
;
1585 * We must not free current_ace here as its
1586 * pointer is now owned by the dir_ace list.
1594 * Only add to the file ACL if not inherit only.
1597 if (current_ace
&& !(psa
->flags
& SEC_ACE_FLAG_INHERIT_ONLY
)) {
1598 DLIST_ADD_END(file_ace
, current_ace
, canon_ace
*);
1601 * Note if this was an allow ace. We can't process
1602 * any further deny ace's after this.
1605 if (current_ace
->attr
== ALLOW_ACE
)
1606 got_file_allow
= True
;
1608 if ((current_ace
->attr
== DENY_ACE
) && got_file_allow
) {
1609 DEBUG(0,("create_canon_ace_lists: malformed ACL in file ACL ! \
1610 Deny entry after Allow entry. Failing to set on file %s.\n", fsp
->fsp_name
));
1611 free_canon_ace_list(file_ace
);
1612 free_canon_ace_list(dir_ace
);
1616 if( DEBUGLVL( 10 )) {
1617 dbgtext("create_canon_ace_lists: adding file ACL:\n");
1618 print_canon_ace( current_ace
, 0);
1620 all_aces_are_inherit_only
= False
;
1622 * We must not free current_ace here as its
1623 * pointer is now owned by the file_ace list.
1629 * Free if ACE was not added.
1632 SAFE_FREE(current_ace
);
1635 if (fsp
->is_directory
&& all_aces_are_inherit_only
) {
1637 * Windows 2000 is doing one of these weird 'inherit acl'
1638 * traverses to conserve NTFS ACL resources. Just pretend
1639 * there was no DACL sent. JRA.
1642 DEBUG(10,("create_canon_ace_lists: Win2k inherit acl traverse. Ignoring DACL.\n"));
1643 free_canon_ace_list(file_ace
);
1644 free_canon_ace_list(dir_ace
);
1649 * Check if we have SMB_ACL_USER_OBJ and SMB_ACL_GROUP_OBJ entries in each
1650 * ACL. If we don't have them, check if any SMB_ACL_USER/SMB_ACL_GROUP
1651 * entries can be converted to *_OBJ. Usually we will already have these
1652 * entries in the Default ACL, and the Access ACL will not have them.
1655 check_owning_objs(file_ace
, pfile_owner_sid
, pfile_grp_sid
);
1658 check_owning_objs(dir_ace
, pfile_owner_sid
, pfile_grp_sid
);
1662 *ppfile_ace
= file_ace
;
1663 *ppdir_ace
= dir_ace
;
1668 /****************************************************************************
1669 ASCII art time again... JRA :-).
1671 We have 4 cases to process when moving from an NT ACL to a POSIX ACL. Firstly,
1672 we insist the ACL is in canonical form (ie. all DENY entries preceede ALLOW
1673 entries). Secondly, the merge code has ensured that all duplicate SID entries for
1674 allow or deny have been merged, so the same SID can only appear once in the deny
1675 list or once in the allow list.
1677 We then process as follows :
1679 ---------------------------------------------------------------------------
1680 First pass - look for a Everyone DENY entry.
1682 If it is deny all (rwx) trunate the list at this point.
1683 Else, walk the list from this point and use the deny permissions of this
1684 entry as a mask on all following allow entries. Finally, delete
1685 the Everyone DENY entry (we have applied it to everything possible).
1687 In addition, in this pass we remove any DENY entries that have
1688 no permissions (ie. they are a DENY nothing).
1689 ---------------------------------------------------------------------------
1690 Second pass - only deal with deny user entries.
1692 DENY user1 (perms XXX)
1695 for all following allow group entries where user1 is in group
1696 new_perms |= group_perms;
1698 user1 entry perms = new_perms & ~ XXX;
1700 Convert the deny entry to an allow entry with the new perms and
1701 push to the end of the list. Note if the user was in no groups
1702 this maps to a specific allow nothing entry for this user.
1704 The common case from the NT ACL choser (userX deny all) is
1705 optimised so we don't do the group lookup - we just map to
1706 an allow nothing entry.
1708 What we're doing here is inferring the allow permissions the
1709 person setting the ACE on user1 wanted by looking at the allow
1710 permissions on the groups the user is currently in. This will
1711 be a snapshot, depending on group membership but is the best
1712 we can do and has the advantage of failing closed rather than
1714 ---------------------------------------------------------------------------
1715 Third pass - only deal with deny group entries.
1717 DENY group1 (perms XXX)
1719 for all following allow user entries where user is in group1
1720 user entry perms = user entry perms & ~ XXX;
1722 If there is a group Everyone allow entry with permissions YYY,
1723 convert the group1 entry to an allow entry and modify its
1726 new_perms = YYY & ~ XXX
1728 and push to the end of the list.
1730 If there is no group Everyone allow entry then convert the
1731 group1 entry to a allow nothing entry and push to the end of the list.
1733 Note that the common case from the NT ACL choser (groupX deny all)
1734 cannot be optimised here as we need to modify user entries who are
1735 in the group to change them to a deny all also.
1737 What we're doing here is modifying the allow permissions of
1738 user entries (which are more specific in POSIX ACLs) to mask
1739 out the explicit deny set on the group they are in. This will
1740 be a snapshot depending on current group membership but is the
1741 best we can do and has the advantage of failing closed rather
1743 ---------------------------------------------------------------------------
1744 Fourth pass - cope with cumulative permissions.
1746 for all allow user entries, if there exists an allow group entry with
1747 more permissive permissions, and the user is in that group, rewrite the
1748 allow user permissions to contain both sets of permissions.
1750 Currently the code for this is #ifdef'ed out as these semantics make
1751 no sense to me. JRA.
1752 ---------------------------------------------------------------------------
1754 Note we *MUST* do the deny user pass first as this will convert deny user
1755 entries into allow user entries which can then be processed by the deny
1758 The above algorithm took a *lot* of thinking about - hence this
1759 explaination :-). JRA.
1760 ****************************************************************************/
1762 /****************************************************************************
1763 Process a canon_ace list entries. This is very complex code. We need
1764 to go through and remove the "deny" permissions from any allow entry that matches
1765 the id of this entry. We have already refused any NT ACL that wasn't in correct
1766 order (DENY followed by ALLOW). If any allow entry ends up with zero permissions,
1767 we just remove it (to fail safe). We have already removed any duplicate ace
1768 entries. Treat an "Everyone" DENY_ACE as a special case - use it to mask all
1770 ****************************************************************************/
1772 static void process_deny_list( canon_ace
**pp_ace_list
)
1774 canon_ace
*ace_list
= *pp_ace_list
;
1775 canon_ace
*curr_ace
= NULL
;
1776 canon_ace
*curr_ace_next
= NULL
;
1778 /* Pass 1 above - look for an Everyone, deny entry. */
1780 for (curr_ace
= ace_list
; curr_ace
; curr_ace
= curr_ace_next
) {
1781 canon_ace
*allow_ace_p
;
1783 curr_ace_next
= curr_ace
->next
; /* So we can't lose the link. */
1785 if (curr_ace
->attr
!= DENY_ACE
)
1788 if (curr_ace
->perms
== (mode_t
)0) {
1790 /* Deny nothing entry - delete. */
1792 DLIST_REMOVE(ace_list
, curr_ace
);
1796 if (!sid_equal(&curr_ace
->trustee
, &global_sid_World
))
1799 /* JRATEST - assert. */
1800 SMB_ASSERT(curr_ace
->owner_type
== WORLD_ACE
);
1802 if (curr_ace
->perms
== ALL_ACE_PERMS
) {
1805 * Optimisation. This is a DENY_ALL to Everyone. Truncate the
1806 * list at this point including this entry.
1809 canon_ace
*prev_entry
= curr_ace
->prev
;
1811 free_canon_ace_list( curr_ace
);
1813 prev_entry
->next
= NULL
;
1815 /* We deleted the entire list. */
1821 for (allow_ace_p
= curr_ace
->next
; allow_ace_p
; allow_ace_p
= allow_ace_p
->next
) {
1824 * Only mask off allow entries.
1827 if (allow_ace_p
->attr
!= ALLOW_ACE
)
1830 allow_ace_p
->perms
&= ~curr_ace
->perms
;
1834 * Now it's been applied, remove it.
1837 DLIST_REMOVE(ace_list
, curr_ace
);
1840 /* Pass 2 above - deal with deny user entries. */
1842 for (curr_ace
= ace_list
; curr_ace
; curr_ace
= curr_ace_next
) {
1843 mode_t new_perms
= (mode_t
)0;
1844 canon_ace
*allow_ace_p
;
1846 curr_ace_next
= curr_ace
->next
; /* So we can't lose the link. */
1848 if (curr_ace
->attr
!= DENY_ACE
)
1851 if (curr_ace
->owner_type
!= UID_ACE
)
1854 if (curr_ace
->perms
== ALL_ACE_PERMS
) {
1857 * Optimisation - this is a deny everything to this user.
1858 * Convert to an allow nothing and push to the end of the list.
1861 curr_ace
->attr
= ALLOW_ACE
;
1862 curr_ace
->perms
= (mode_t
)0;
1863 DLIST_DEMOTE(ace_list
, curr_ace
, canon_ace
*);
1867 for (allow_ace_p
= curr_ace
->next
; allow_ace_p
; allow_ace_p
= allow_ace_p
->next
) {
1869 if (allow_ace_p
->attr
!= ALLOW_ACE
)
1872 /* We process GID_ACE and WORLD_ACE entries only. */
1874 if (allow_ace_p
->owner_type
== UID_ACE
)
1877 if (uid_entry_in_group( curr_ace
, allow_ace_p
))
1878 new_perms
|= allow_ace_p
->perms
;
1882 * Convert to a allow entry, modify the perms and push to the end
1886 curr_ace
->attr
= ALLOW_ACE
;
1887 curr_ace
->perms
= (new_perms
& ~curr_ace
->perms
);
1888 DLIST_DEMOTE(ace_list
, curr_ace
, canon_ace
*);
1891 /* Pass 3 above - deal with deny group entries. */
1893 for (curr_ace
= ace_list
; curr_ace
; curr_ace
= curr_ace_next
) {
1894 canon_ace
*allow_ace_p
;
1895 canon_ace
*allow_everyone_p
= NULL
;
1897 curr_ace_next
= curr_ace
->next
; /* So we can't lose the link. */
1899 if (curr_ace
->attr
!= DENY_ACE
)
1902 if (curr_ace
->owner_type
!= GID_ACE
)
1905 for (allow_ace_p
= curr_ace
->next
; allow_ace_p
; allow_ace_p
= allow_ace_p
->next
) {
1907 if (allow_ace_p
->attr
!= ALLOW_ACE
)
1910 /* Store a pointer to the Everyone allow, if it exists. */
1911 if (allow_ace_p
->owner_type
== WORLD_ACE
)
1912 allow_everyone_p
= allow_ace_p
;
1914 /* We process UID_ACE entries only. */
1916 if (allow_ace_p
->owner_type
!= UID_ACE
)
1919 /* Mask off the deny group perms. */
1921 if (uid_entry_in_group( allow_ace_p
, curr_ace
))
1922 allow_ace_p
->perms
&= ~curr_ace
->perms
;
1926 * Convert the deny to an allow with the correct perms and
1927 * push to the end of the list.
1930 curr_ace
->attr
= ALLOW_ACE
;
1931 if (allow_everyone_p
)
1932 curr_ace
->perms
= allow_everyone_p
->perms
& ~curr_ace
->perms
;
1934 curr_ace
->perms
= (mode_t
)0;
1935 DLIST_DEMOTE(ace_list
, curr_ace
, canon_ace
*);
1938 /* Doing this fourth pass allows Windows semantics to be layered
1939 * on top of POSIX semantics. I'm not sure if this is desirable.
1940 * For example, in W2K ACLs there is no way to say, "Group X no
1941 * access, user Y full access" if user Y is a member of group X.
1942 * This seems completely broken semantics to me.... JRA.
1946 /* Pass 4 above - deal with allow entries. */
1948 for (curr_ace
= ace_list
; curr_ace
; curr_ace
= curr_ace_next
) {
1949 canon_ace
*allow_ace_p
;
1951 curr_ace_next
= curr_ace
->next
; /* So we can't lose the link. */
1953 if (curr_ace
->attr
!= ALLOW_ACE
)
1956 if (curr_ace
->owner_type
!= UID_ACE
)
1959 for (allow_ace_p
= ace_list
; allow_ace_p
; allow_ace_p
= allow_ace_p
->next
) {
1961 if (allow_ace_p
->attr
!= ALLOW_ACE
)
1964 /* We process GID_ACE entries only. */
1966 if (allow_ace_p
->owner_type
!= GID_ACE
)
1969 /* OR in the group perms. */
1971 if (uid_entry_in_group( curr_ace
, allow_ace_p
))
1972 curr_ace
->perms
|= allow_ace_p
->perms
;
1977 *pp_ace_list
= ace_list
;
1980 /****************************************************************************
1981 Create a default mode that will be used if a security descriptor entry has
1982 no user/group/world entries.
1983 ****************************************************************************/
1985 static mode_t
create_default_mode(files_struct
*fsp
, bool interitable_mode
)
1987 int snum
= SNUM(fsp
->conn
);
1988 mode_t and_bits
= (mode_t
)0;
1989 mode_t or_bits
= (mode_t
)0;
1990 mode_t mode
= interitable_mode
1991 ? unix_mode( fsp
->conn
, FILE_ATTRIBUTE_ARCHIVE
, fsp
->fsp_name
,
1995 if (fsp
->is_directory
)
1996 mode
|= (S_IWUSR
|S_IXUSR
);
1999 * Now AND with the create mode/directory mode bits then OR with the
2000 * force create mode/force directory mode bits.
2003 if (fsp
->is_directory
) {
2004 and_bits
= lp_dir_security_mask(snum
);
2005 or_bits
= lp_force_dir_security_mode(snum
);
2007 and_bits
= lp_security_mask(snum
);
2008 or_bits
= lp_force_security_mode(snum
);
2011 return ((mode
& and_bits
)|or_bits
);
2014 /****************************************************************************
2015 Unpack a SEC_DESC into two canonical ace lists. We don't depend on this
2017 ****************************************************************************/
2019 static bool unpack_canon_ace(files_struct
*fsp
,
2020 SMB_STRUCT_STAT
*pst
,
2021 DOM_SID
*pfile_owner_sid
,
2022 DOM_SID
*pfile_grp_sid
,
2023 canon_ace
**ppfile_ace
,
2024 canon_ace
**ppdir_ace
,
2025 uint32 security_info_sent
,
2026 const SEC_DESC
*psd
)
2028 canon_ace
*file_ace
= NULL
;
2029 canon_ace
*dir_ace
= NULL
;
2034 if(security_info_sent
== 0) {
2035 DEBUG(0,("unpack_canon_ace: no security info sent !\n"));
2040 * If no DACL then this is a chown only security descriptor.
2043 if(!(security_info_sent
& DACL_SECURITY_INFORMATION
) || !psd
->dacl
)
2047 * Now go through the DACL and create the canon_ace lists.
2050 if (!create_canon_ace_lists( fsp
, pst
, pfile_owner_sid
, pfile_grp_sid
,
2051 &file_ace
, &dir_ace
, psd
->dacl
))
2054 if ((file_ace
== NULL
) && (dir_ace
== NULL
)) {
2055 /* W2K traverse DACL set - ignore. */
2060 * Go through the canon_ace list and merge entries
2061 * belonging to identical users of identical allow or deny type.
2062 * We can do this as all deny entries come first, followed by
2063 * all allow entries (we have mandated this before accepting this acl).
2066 print_canon_ace_list( "file ace - before merge", file_ace
);
2067 merge_aces( &file_ace
);
2069 print_canon_ace_list( "dir ace - before merge", dir_ace
);
2070 merge_aces( &dir_ace
);
2073 * NT ACLs are order dependent. Go through the acl lists and
2074 * process DENY entries by masking the allow entries.
2077 print_canon_ace_list( "file ace - before deny", file_ace
);
2078 process_deny_list( &file_ace
);
2080 print_canon_ace_list( "dir ace - before deny", dir_ace
);
2081 process_deny_list( &dir_ace
);
2084 * A well formed POSIX file or default ACL has at least 3 entries, a
2085 * SMB_ACL_USER_OBJ, SMB_ACL_GROUP_OBJ, SMB_ACL_OTHER_OBJ
2086 * and optionally a mask entry. Ensure this is the case.
2089 print_canon_ace_list( "file ace - before valid", file_ace
);
2092 * A default 3 element mode entry for a file should be r-- --- ---.
2093 * A default 3 element mode entry for a directory should be rwx --- ---.
2096 pst
->st_mode
= create_default_mode(fsp
, False
);
2098 if (!ensure_canon_entry_valid(&file_ace
, fsp
->conn
->params
, fsp
->is_directory
, pfile_owner_sid
, pfile_grp_sid
, pst
, True
)) {
2099 free_canon_ace_list(file_ace
);
2100 free_canon_ace_list(dir_ace
);
2104 print_canon_ace_list( "dir ace - before valid", dir_ace
);
2107 * A default inheritable 3 element mode entry for a directory should be the
2108 * mode Samba will use to create a file within. Ensure user rwx bits are set if
2112 pst
->st_mode
= create_default_mode(fsp
, True
);
2114 if (dir_ace
&& !ensure_canon_entry_valid(&dir_ace
, fsp
->conn
->params
, fsp
->is_directory
, pfile_owner_sid
, pfile_grp_sid
, pst
, True
)) {
2115 free_canon_ace_list(file_ace
);
2116 free_canon_ace_list(dir_ace
);
2120 print_canon_ace_list( "file ace - return", file_ace
);
2121 print_canon_ace_list( "dir ace - return", dir_ace
);
2123 *ppfile_ace
= file_ace
;
2124 *ppdir_ace
= dir_ace
;
2129 /******************************************************************************
2130 When returning permissions, try and fit NT display
2131 semantics if possible. Note the the canon_entries here must have been malloced.
2132 The list format should be - first entry = owner, followed by group and other user
2133 entries, last entry = other.
2135 Note that this doesn't exactly match the NT semantics for an ACL. As POSIX entries
2136 are not ordered, and match on the most specific entry rather than walking a list,
2137 then a simple POSIX permission of rw-r--r-- should really map to 5 entries,
2139 Entry 0: owner : deny all except read and write.
2140 Entry 1: owner : allow read and write.
2141 Entry 2: group : deny all except read.
2142 Entry 3: group : allow read.
2143 Entry 4: Everyone : allow read.
2145 But NT cannot display this in their ACL editor !
2146 ********************************************************************************/
2148 static void arrange_posix_perms(const char *filename
, canon_ace
**pp_list_head
)
2150 canon_ace
*list_head
= *pp_list_head
;
2151 canon_ace
*owner_ace
= NULL
;
2152 canon_ace
*other_ace
= NULL
;
2153 canon_ace
*ace
= NULL
;
2155 for (ace
= list_head
; ace
; ace
= ace
->next
) {
2156 if (ace
->type
== SMB_ACL_USER_OBJ
)
2158 else if (ace
->type
== SMB_ACL_OTHER
) {
2159 /* Last ace - this is "other" */
2164 if (!owner_ace
|| !other_ace
) {
2165 DEBUG(0,("arrange_posix_perms: Invalid POSIX permissions for file %s, missing owner or other.\n",
2171 * The POSIX algorithm applies to owner first, and other last,
2172 * so ensure they are arranged in this order.
2176 DLIST_PROMOTE(list_head
, owner_ace
);
2180 DLIST_DEMOTE(list_head
, other_ace
, canon_ace
*);
2183 /* We have probably changed the head of the list. */
2185 *pp_list_head
= list_head
;
2188 /****************************************************************************
2189 Create a linked list of canonical ACE entries.
2190 ****************************************************************************/
2192 static canon_ace
*canonicalise_acl(struct connection_struct
*conn
,
2193 const char *fname
, SMB_ACL_T posix_acl
,
2194 const SMB_STRUCT_STAT
*psbuf
,
2195 const DOM_SID
*powner
, const DOM_SID
*pgroup
, struct pai_val
*pal
, SMB_ACL_TYPE_T the_acl_type
)
2197 mode_t acl_mask
= (S_IRUSR
|S_IWUSR
|S_IXUSR
);
2198 canon_ace
*list_head
= NULL
;
2199 canon_ace
*ace
= NULL
;
2200 canon_ace
*next_ace
= NULL
;
2201 int entry_id
= SMB_ACL_FIRST_ENTRY
;
2202 SMB_ACL_ENTRY_T entry
;
2205 while ( posix_acl
&& (SMB_VFS_SYS_ACL_GET_ENTRY(conn
, posix_acl
, entry_id
, &entry
) == 1)) {
2206 SMB_ACL_TAG_T tagtype
;
2207 SMB_ACL_PERMSET_T permset
;
2210 enum ace_owner owner_type
;
2212 entry_id
= SMB_ACL_NEXT_ENTRY
;
2214 /* Is this a MASK entry ? */
2215 if (SMB_VFS_SYS_ACL_GET_TAG_TYPE(conn
, entry
, &tagtype
) == -1)
2218 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn
, entry
, &permset
) == -1)
2221 /* Decide which SID to use based on the ACL type. */
2223 case SMB_ACL_USER_OBJ
:
2224 /* Get the SID from the owner. */
2225 sid_copy(&sid
, powner
);
2226 unix_ug
.uid
= psbuf
->st_uid
;
2227 owner_type
= UID_ACE
;
2231 uid_t
*puid
= (uid_t
*)SMB_VFS_SYS_ACL_GET_QUALIFIER(conn
, entry
);
2233 DEBUG(0,("canonicalise_acl: Failed to get uid.\n"));
2237 * A SMB_ACL_USER entry for the owner is shadowed by the
2238 * SMB_ACL_USER_OBJ entry and Windows also cannot represent
2239 * that entry, so we ignore it. We also don't create such
2240 * entries out of the blue when setting ACLs, so a get/set
2241 * cycle will drop them.
2243 if (the_acl_type
== SMB_ACL_TYPE_ACCESS
&& *puid
== psbuf
->st_uid
) {
2244 SMB_VFS_SYS_ACL_FREE_QUALIFIER(conn
, (void *)puid
,tagtype
);
2247 uid_to_sid( &sid
, *puid
);
2248 unix_ug
.uid
= *puid
;
2249 owner_type
= UID_ACE
;
2250 SMB_VFS_SYS_ACL_FREE_QUALIFIER(conn
, (void *)puid
,tagtype
);
2253 case SMB_ACL_GROUP_OBJ
:
2254 /* Get the SID from the owning group. */
2255 sid_copy(&sid
, pgroup
);
2256 unix_ug
.gid
= psbuf
->st_gid
;
2257 owner_type
= GID_ACE
;
2261 gid_t
*pgid
= (gid_t
*)SMB_VFS_SYS_ACL_GET_QUALIFIER(conn
, entry
);
2263 DEBUG(0,("canonicalise_acl: Failed to get gid.\n"));
2266 gid_to_sid( &sid
, *pgid
);
2267 unix_ug
.gid
= *pgid
;
2268 owner_type
= GID_ACE
;
2269 SMB_VFS_SYS_ACL_FREE_QUALIFIER(conn
, (void *)pgid
,tagtype
);
2273 acl_mask
= convert_permset_to_mode_t(conn
, permset
);
2274 continue; /* Don't count the mask as an entry. */
2276 /* Use the Everyone SID */
2277 sid
= global_sid_World
;
2279 owner_type
= WORLD_ACE
;
2282 DEBUG(0,("canonicalise_acl: Unknown tagtype %u\n", (unsigned int)tagtype
));
2287 * Add this entry to the list.
2290 if ((ace
= SMB_MALLOC_P(canon_ace
)) == NULL
)
2294 ace
->type
= tagtype
;
2295 ace
->perms
= convert_permset_to_mode_t(conn
, permset
);
2296 ace
->attr
= ALLOW_ACE
;
2298 ace
->unix_ug
= unix_ug
;
2299 ace
->owner_type
= owner_type
;
2300 ace
->inherited
= get_inherited_flag(pal
, ace
, (the_acl_type
== SMB_ACL_TYPE_DEFAULT
));
2302 DLIST_ADD(list_head
, ace
);
2306 * This next call will ensure we have at least a user/group/world set.
2309 if (!ensure_canon_entry_valid(&list_head
, conn
->params
,
2310 S_ISDIR(psbuf
->st_mode
), powner
, pgroup
,
2315 * Now go through the list, masking the permissions with the
2316 * acl_mask. Ensure all DENY Entries are at the start of the list.
2319 DEBUG(10,("canonicalise_acl: %s ace entries before arrange :\n", the_acl_type
== SMB_ACL_TYPE_ACCESS
? "Access" : "Default" ));
2321 for ( ace_count
= 0, ace
= list_head
; ace
; ace
= next_ace
, ace_count
++) {
2322 next_ace
= ace
->next
;
2324 /* Masks are only applied to entries other than USER_OBJ and OTHER. */
2325 if (ace
->type
!= SMB_ACL_OTHER
&& ace
->type
!= SMB_ACL_USER_OBJ
)
2326 ace
->perms
&= acl_mask
;
2328 if (ace
->perms
== 0) {
2329 DLIST_PROMOTE(list_head
, ace
);
2332 if( DEBUGLVL( 10 ) ) {
2333 print_canon_ace(ace
, ace_count
);
2337 arrange_posix_perms(fname
,&list_head
);
2339 print_canon_ace_list( "canonicalise_acl: ace entries after arrange", list_head
);
2345 free_canon_ace_list(list_head
);
2349 /****************************************************************************
2350 Check if the current user group list contains a given group.
2351 ****************************************************************************/
2353 static bool current_user_in_group(gid_t gid
)
2357 for (i
= 0; i
< current_user
.ut
.ngroups
; i
++) {
2358 if (current_user
.ut
.groups
[i
] == gid
) {
2366 /****************************************************************************
2367 Should we override a deny ? Check 'acl group control' and 'dos filemode'.
2368 ****************************************************************************/
2370 static bool acl_group_override(connection_struct
*conn
,
2374 SMB_STRUCT_STAT sbuf
;
2376 if ((errno
!= EPERM
) && (errno
!= EACCES
)) {
2380 /* file primary group == user primary or supplementary group */
2381 if (lp_acl_group_control(SNUM(conn
)) &&
2382 current_user_in_group(prim_gid
)) {
2386 /* user has writeable permission */
2387 if (lp_dos_filemode(SNUM(conn
)) &&
2388 can_write_to_file(conn
, fname
, &sbuf
)) {
2395 /****************************************************************************
2396 Attempt to apply an ACL to a file or directory.
2397 ****************************************************************************/
2399 static bool set_canon_ace_list(files_struct
*fsp
, canon_ace
*the_ace
, bool default_ace
, gid_t prim_gid
, bool *pacl_set_support
)
2401 connection_struct
*conn
= fsp
->conn
;
2403 SMB_ACL_T the_acl
= SMB_VFS_SYS_ACL_INIT(conn
, (int)count_canon_ace_list(the_ace
) + 1);
2406 SMB_ACL_ENTRY_T mask_entry
;
2407 bool got_mask_entry
= False
;
2408 SMB_ACL_PERMSET_T mask_permset
;
2409 SMB_ACL_TYPE_T the_acl_type
= (default_ace
? SMB_ACL_TYPE_DEFAULT
: SMB_ACL_TYPE_ACCESS
);
2410 bool needs_mask
= False
;
2411 mode_t mask_perms
= 0;
2413 #if defined(POSIX_ACL_NEEDS_MASK)
2414 /* HP-UX always wants to have a mask (called "class" there). */
2418 if (the_acl
== NULL
) {
2420 if (!no_acl_syscall_error(errno
)) {
2422 * Only print this error message if we have some kind of ACL
2423 * support that's not working. Otherwise we would always get this.
2425 DEBUG(0,("set_canon_ace_list: Unable to init %s ACL. (%s)\n",
2426 default_ace
? "default" : "file", strerror(errno
) ));
2428 *pacl_set_support
= False
;
2432 if( DEBUGLVL( 10 )) {
2433 dbgtext("set_canon_ace_list: setting ACL:\n");
2434 for (i
= 0, p_ace
= the_ace
; p_ace
; p_ace
= p_ace
->next
, i
++ ) {
2435 print_canon_ace( p_ace
, i
);
2439 for (i
= 0, p_ace
= the_ace
; p_ace
; p_ace
= p_ace
->next
, i
++ ) {
2440 SMB_ACL_ENTRY_T the_entry
;
2441 SMB_ACL_PERMSET_T the_permset
;
2444 * ACLs only "need" an ACL_MASK entry if there are any named user or
2445 * named group entries. But if there is an ACL_MASK entry, it applies
2446 * to ACL_USER, ACL_GROUP, and ACL_GROUP_OBJ entries. Set the mask
2447 * so that it doesn't deny (i.e., mask off) any permissions.
2450 if (p_ace
->type
== SMB_ACL_USER
|| p_ace
->type
== SMB_ACL_GROUP
) {
2452 mask_perms
|= p_ace
->perms
;
2453 } else if (p_ace
->type
== SMB_ACL_GROUP_OBJ
) {
2454 mask_perms
|= p_ace
->perms
;
2458 * Get the entry for this ACE.
2461 if (SMB_VFS_SYS_ACL_CREATE_ENTRY(conn
, &the_acl
, &the_entry
) == -1) {
2462 DEBUG(0,("set_canon_ace_list: Failed to create entry %d. (%s)\n",
2463 i
, strerror(errno
) ));
2467 if (p_ace
->type
== SMB_ACL_MASK
) {
2468 mask_entry
= the_entry
;
2469 got_mask_entry
= True
;
2473 * Ok - we now know the ACL calls should be working, don't
2474 * allow fallback to chmod.
2477 *pacl_set_support
= True
;
2480 * Initialise the entry from the canon_ace.
2484 * First tell the entry what type of ACE this is.
2487 if (SMB_VFS_SYS_ACL_SET_TAG_TYPE(conn
, the_entry
, p_ace
->type
) == -1) {
2488 DEBUG(0,("set_canon_ace_list: Failed to set tag type on entry %d. (%s)\n",
2489 i
, strerror(errno
) ));
2494 * Only set the qualifier (user or group id) if the entry is a user
2498 if ((p_ace
->type
== SMB_ACL_USER
) || (p_ace
->type
== SMB_ACL_GROUP
)) {
2499 if (SMB_VFS_SYS_ACL_SET_QUALIFIER(conn
, the_entry
,(void *)&p_ace
->unix_ug
.uid
) == -1) {
2500 DEBUG(0,("set_canon_ace_list: Failed to set qualifier on entry %d. (%s)\n",
2501 i
, strerror(errno
) ));
2507 * Convert the mode_t perms in the canon_ace to a POSIX permset.
2510 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn
, the_entry
, &the_permset
) == -1) {
2511 DEBUG(0,("set_canon_ace_list: Failed to get permset on entry %d. (%s)\n",
2512 i
, strerror(errno
) ));
2516 if (map_acl_perms_to_permset(conn
, p_ace
->perms
, &the_permset
) == -1) {
2517 DEBUG(0,("set_canon_ace_list: Failed to create permset for mode (%u) on entry %d. (%s)\n",
2518 (unsigned int)p_ace
->perms
, i
, strerror(errno
) ));
2523 * ..and apply them to the entry.
2526 if (SMB_VFS_SYS_ACL_SET_PERMSET(conn
, the_entry
, the_permset
) == -1) {
2527 DEBUG(0,("set_canon_ace_list: Failed to add permset on entry %d. (%s)\n",
2528 i
, strerror(errno
) ));
2533 print_canon_ace( p_ace
, i
);
2537 if (needs_mask
&& !got_mask_entry
) {
2538 if (SMB_VFS_SYS_ACL_CREATE_ENTRY(conn
, &the_acl
, &mask_entry
) == -1) {
2539 DEBUG(0,("set_canon_ace_list: Failed to create mask entry. (%s)\n", strerror(errno
) ));
2543 if (SMB_VFS_SYS_ACL_SET_TAG_TYPE(conn
, mask_entry
, SMB_ACL_MASK
) == -1) {
2544 DEBUG(0,("set_canon_ace_list: Failed to set tag type on mask entry. (%s)\n",strerror(errno
) ));
2548 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn
, mask_entry
, &mask_permset
) == -1) {
2549 DEBUG(0,("set_canon_ace_list: Failed to get mask permset. (%s)\n", strerror(errno
) ));
2553 if (map_acl_perms_to_permset(conn
, S_IRUSR
|S_IWUSR
|S_IXUSR
, &mask_permset
) == -1) {
2554 DEBUG(0,("set_canon_ace_list: Failed to create mask permset. (%s)\n", strerror(errno
) ));
2558 if (SMB_VFS_SYS_ACL_SET_PERMSET(conn
, mask_entry
, mask_permset
) == -1) {
2559 DEBUG(0,("set_canon_ace_list: Failed to add mask permset. (%s)\n", strerror(errno
) ));
2565 * Finally apply it to the file or directory.
2568 if(default_ace
|| fsp
->is_directory
|| fsp
->fh
->fd
== -1) {
2569 if (SMB_VFS_SYS_ACL_SET_FILE(conn
, fsp
->fsp_name
, the_acl_type
, the_acl
) == -1) {
2571 * Some systems allow all the above calls and only fail with no ACL support
2572 * when attempting to apply the acl. HPUX with HFS is an example of this. JRA.
2574 if (no_acl_syscall_error(errno
)) {
2575 *pacl_set_support
= False
;
2578 if (acl_group_override(conn
, prim_gid
, fsp
->fsp_name
)) {
2581 DEBUG(5,("set_canon_ace_list: acl group control on and current user in file %s primary group.\n",
2585 sret
= SMB_VFS_SYS_ACL_SET_FILE(conn
, fsp
->fsp_name
, the_acl_type
, the_acl
);
2593 DEBUG(2,("set_canon_ace_list: sys_acl_set_file type %s failed for file %s (%s).\n",
2594 the_acl_type
== SMB_ACL_TYPE_DEFAULT
? "directory default" : "file",
2595 fsp
->fsp_name
, strerror(errno
) ));
2600 if (SMB_VFS_SYS_ACL_SET_FD(fsp
, the_acl
) == -1) {
2602 * Some systems allow all the above calls and only fail with no ACL support
2603 * when attempting to apply the acl. HPUX with HFS is an example of this. JRA.
2605 if (no_acl_syscall_error(errno
)) {
2606 *pacl_set_support
= False
;
2609 if (acl_group_override(conn
, prim_gid
, fsp
->fsp_name
)) {
2612 DEBUG(5,("set_canon_ace_list: acl group control on and current user in file %s primary group.\n",
2616 sret
= SMB_VFS_SYS_ACL_SET_FD(fsp
, the_acl
);
2624 DEBUG(2,("set_canon_ace_list: sys_acl_set_file failed for file %s (%s).\n",
2625 fsp
->fsp_name
, strerror(errno
) ));
2635 if (the_acl
!= NULL
) {
2636 SMB_VFS_SYS_ACL_FREE_ACL(conn
, the_acl
);
2642 /****************************************************************************
2643 Find a particular canon_ace entry.
2644 ****************************************************************************/
2646 static struct canon_ace
*canon_ace_entry_for(struct canon_ace
*list
, SMB_ACL_TAG_T type
, posix_id
*id
)
2649 if (list
->type
== type
&& ((type
!= SMB_ACL_USER
&& type
!= SMB_ACL_GROUP
) ||
2650 (type
== SMB_ACL_USER
&& id
&& id
->uid
== list
->unix_ug
.uid
) ||
2651 (type
== SMB_ACL_GROUP
&& id
&& id
->gid
== list
->unix_ug
.gid
)))
2658 /****************************************************************************
2660 ****************************************************************************/
2662 SMB_ACL_T
free_empty_sys_acl(connection_struct
*conn
, SMB_ACL_T the_acl
)
2664 SMB_ACL_ENTRY_T entry
;
2668 if (SMB_VFS_SYS_ACL_GET_ENTRY(conn
, the_acl
, SMB_ACL_FIRST_ENTRY
, &entry
) != 1) {
2669 SMB_VFS_SYS_ACL_FREE_ACL(conn
, the_acl
);
2675 /****************************************************************************
2676 Convert a canon_ace to a generic 3 element permission - if possible.
2677 ****************************************************************************/
2679 #define MAP_PERM(p,mask,result) (((p) & (mask)) ? (result) : 0 )
2681 static bool convert_canon_ace_to_posix_perms( files_struct
*fsp
, canon_ace
*file_ace_list
, mode_t
*posix_perms
)
2683 int snum
= SNUM(fsp
->conn
);
2684 size_t ace_count
= count_canon_ace_list(file_ace_list
);
2686 canon_ace
*owner_ace
= NULL
;
2687 canon_ace
*group_ace
= NULL
;
2688 canon_ace
*other_ace
= NULL
;
2692 if (ace_count
!= 3) {
2693 DEBUG(3,("convert_canon_ace_to_posix_perms: Too many ACE entries for file %s to convert to \
2694 posix perms.\n", fsp
->fsp_name
));
2698 for (ace_p
= file_ace_list
; ace_p
; ace_p
= ace_p
->next
) {
2699 if (ace_p
->owner_type
== UID_ACE
)
2701 else if (ace_p
->owner_type
== GID_ACE
)
2703 else if (ace_p
->owner_type
== WORLD_ACE
)
2707 if (!owner_ace
|| !group_ace
|| !other_ace
) {
2708 DEBUG(3,("convert_canon_ace_to_posix_perms: Can't get standard entries for file %s.\n",
2713 *posix_perms
= (mode_t
)0;
2715 *posix_perms
|= owner_ace
->perms
;
2716 *posix_perms
|= MAP_PERM(group_ace
->perms
, S_IRUSR
, S_IRGRP
);
2717 *posix_perms
|= MAP_PERM(group_ace
->perms
, S_IWUSR
, S_IWGRP
);
2718 *posix_perms
|= MAP_PERM(group_ace
->perms
, S_IXUSR
, S_IXGRP
);
2719 *posix_perms
|= MAP_PERM(other_ace
->perms
, S_IRUSR
, S_IROTH
);
2720 *posix_perms
|= MAP_PERM(other_ace
->perms
, S_IWUSR
, S_IWOTH
);
2721 *posix_perms
|= MAP_PERM(other_ace
->perms
, S_IXUSR
, S_IXOTH
);
2723 /* The owner must have at least read access. */
2725 *posix_perms
|= S_IRUSR
;
2726 if (fsp
->is_directory
)
2727 *posix_perms
|= (S_IWUSR
|S_IXUSR
);
2729 /* If requested apply the masks. */
2731 /* Get the initial bits to apply. */
2733 if (fsp
->is_directory
) {
2734 and_bits
= lp_dir_security_mask(snum
);
2735 or_bits
= lp_force_dir_security_mode(snum
);
2737 and_bits
= lp_security_mask(snum
);
2738 or_bits
= lp_force_security_mode(snum
);
2741 *posix_perms
= (((*posix_perms
) & and_bits
)|or_bits
);
2743 DEBUG(10,("convert_canon_ace_to_posix_perms: converted u=%o,g=%o,w=%o to perm=0%o for file %s.\n",
2744 (int)owner_ace
->perms
, (int)group_ace
->perms
, (int)other_ace
->perms
, (int)*posix_perms
,
2750 /****************************************************************************
2751 Incoming NT ACLs on a directory can be split into a default POSIX acl (CI|OI|IO) and
2752 a normal POSIX acl. Win2k needs these split acls re-merging into one ACL
2753 with CI|OI set so it is inherited and also applies to the directory.
2754 Based on code from "Jim McDonough" <jmcd@us.ibm.com>.
2755 ****************************************************************************/
2757 static size_t merge_default_aces( SEC_ACE
*nt_ace_list
, size_t num_aces
)
2761 for (i
= 0; i
< num_aces
; i
++) {
2762 for (j
= i
+1; j
< num_aces
; j
++) {
2763 uint32 i_flags_ni
= (nt_ace_list
[i
].flags
& ~SEC_ACE_FLAG_INHERITED_ACE
);
2764 uint32 j_flags_ni
= (nt_ace_list
[j
].flags
& ~SEC_ACE_FLAG_INHERITED_ACE
);
2765 bool i_inh
= (nt_ace_list
[i
].flags
& SEC_ACE_FLAG_INHERITED_ACE
) ? True
: False
;
2766 bool j_inh
= (nt_ace_list
[j
].flags
& SEC_ACE_FLAG_INHERITED_ACE
) ? True
: False
;
2768 /* We know the lower number ACE's are file entries. */
2769 if ((nt_ace_list
[i
].type
== nt_ace_list
[j
].type
) &&
2770 (nt_ace_list
[i
].size
== nt_ace_list
[j
].size
) &&
2771 (nt_ace_list
[i
].access_mask
== nt_ace_list
[j
].access_mask
) &&
2772 sid_equal(&nt_ace_list
[i
].trustee
, &nt_ace_list
[j
].trustee
) &&
2774 (i_flags_ni
== 0) &&
2775 (j_flags_ni
== (SEC_ACE_FLAG_OBJECT_INHERIT
|
2776 SEC_ACE_FLAG_CONTAINER_INHERIT
|
2777 SEC_ACE_FLAG_INHERIT_ONLY
))) {
2779 * W2K wants to have access allowed zero access ACE's
2780 * at the end of the list. If the mask is zero, merge
2781 * the non-inherited ACE onto the inherited ACE.
2784 if (nt_ace_list
[i
].access_mask
== 0) {
2785 nt_ace_list
[j
].flags
= SEC_ACE_FLAG_OBJECT_INHERIT
|SEC_ACE_FLAG_CONTAINER_INHERIT
|
2786 (i_inh
? SEC_ACE_FLAG_INHERITED_ACE
: 0);
2787 if (num_aces
- i
- 1 > 0)
2788 memmove(&nt_ace_list
[i
], &nt_ace_list
[i
+1], (num_aces
-i
-1) *
2791 DEBUG(10,("merge_default_aces: Merging zero access ACE %u onto ACE %u.\n",
2792 (unsigned int)i
, (unsigned int)j
));
2795 * These are identical except for the flags.
2796 * Merge the inherited ACE onto the non-inherited ACE.
2799 nt_ace_list
[i
].flags
= SEC_ACE_FLAG_OBJECT_INHERIT
|SEC_ACE_FLAG_CONTAINER_INHERIT
|
2800 (i_inh
? SEC_ACE_FLAG_INHERITED_ACE
: 0);
2801 if (num_aces
- j
- 1 > 0)
2802 memmove(&nt_ace_list
[j
], &nt_ace_list
[j
+1], (num_aces
-j
-1) *
2805 DEBUG(10,("merge_default_aces: Merging ACE %u onto ACE %u.\n",
2806 (unsigned int)j
, (unsigned int)i
));
2817 /****************************************************************************
2818 Reply to query a security descriptor from an fsp. If it succeeds it allocates
2819 the space for the return elements and returns the size needed to return the
2820 security descriptor. This should be the only external function needed for
2821 the UNIX style get ACL.
2822 ****************************************************************************/
2824 static NTSTATUS
posix_get_nt_acl_common(struct connection_struct
*conn
,
2826 const SMB_STRUCT_STAT
*sbuf
,
2827 struct pai_val
*pal
,
2828 SMB_ACL_T posix_acl
,
2830 uint32_t security_info
,
2836 SEC_ACL
*psa
= NULL
;
2837 size_t num_acls
= 0;
2838 size_t num_def_acls
= 0;
2839 size_t num_aces
= 0;
2840 canon_ace
*file_ace
= NULL
;
2841 canon_ace
*dir_ace
= NULL
;
2842 SEC_ACE
*nt_ace_list
= NULL
;
2843 size_t num_profile_acls
= 0;
2844 SEC_DESC
*psd
= NULL
;
2847 * Get the owner, group and world SIDs.
2850 if (lp_profile_acls(SNUM(conn
))) {
2851 /* For WXP SP1 the owner must be administrators. */
2852 sid_copy(&owner_sid
, &global_sid_Builtin_Administrators
);
2853 sid_copy(&group_sid
, &global_sid_Builtin_Users
);
2854 num_profile_acls
= 2;
2856 create_file_sids(sbuf
, &owner_sid
, &group_sid
);
2859 if ((security_info
& DACL_SECURITY_INFORMATION
) && !(security_info
& PROTECTED_DACL_SECURITY_INFORMATION
)) {
2862 * In the optimum case Creator Owner and Creator Group would be used for
2863 * the ACL_USER_OBJ and ACL_GROUP_OBJ entries, respectively, but this
2864 * would lead to usability problems under Windows: The Creator entries
2865 * are only available in browse lists of directories and not for files;
2866 * additionally the identity of the owning group couldn't be determined.
2867 * We therefore use those identities only for Default ACLs.
2870 /* Create the canon_ace lists. */
2871 file_ace
= canonicalise_acl(conn
, name
, posix_acl
, sbuf
,
2872 &owner_sid
, &group_sid
, pal
,
2873 SMB_ACL_TYPE_ACCESS
);
2875 /* We must have *some* ACLS. */
2877 if (count_canon_ace_list(file_ace
) == 0) {
2878 DEBUG(0,("get_nt_acl : No ACLs on file (%s) !\n", name
));
2882 if (S_ISDIR(sbuf
->st_mode
) && def_acl
) {
2883 dir_ace
= canonicalise_acl(conn
, name
, def_acl
,
2885 &global_sid_Creator_Owner
,
2886 &global_sid_Creator_Group
,
2887 pal
, SMB_ACL_TYPE_DEFAULT
);
2891 * Create the NT ACE list from the canonical ace lists.
2896 enum security_ace_type nt_acl_type
;
2898 if (nt4_compatible_acls() && dir_ace
) {
2900 * NT 4 chokes if an ACL contains an INHERIT_ONLY entry
2901 * but no non-INHERIT_ONLY entry for one SID. So we only
2902 * remove entries from the Access ACL if the
2903 * corresponding Default ACL entries have also been
2904 * removed. ACEs for CREATOR-OWNER and CREATOR-GROUP
2905 * are exceptions. We can do nothing
2906 * intelligent if the Default ACL contains entries that
2907 * are not also contained in the Access ACL, so this
2908 * case will still fail under NT 4.
2911 ace
= canon_ace_entry_for(dir_ace
, SMB_ACL_OTHER
, NULL
);
2912 if (ace
&& !ace
->perms
) {
2913 DLIST_REMOVE(dir_ace
, ace
);
2916 ace
= canon_ace_entry_for(file_ace
, SMB_ACL_OTHER
, NULL
);
2917 if (ace
&& !ace
->perms
) {
2918 DLIST_REMOVE(file_ace
, ace
);
2924 * WinNT doesn't usually have Creator Group
2925 * in browse lists, so we send this entry to
2926 * WinNT even if it contains no relevant
2927 * permissions. Once we can add
2928 * Creator Group to browse lists we can
2933 ace
= canon_ace_entry_for(dir_ace
, SMB_ACL_GROUP_OBJ
, NULL
);
2934 if (ace
&& !ace
->perms
) {
2935 DLIST_REMOVE(dir_ace
, ace
);
2940 ace
= canon_ace_entry_for(file_ace
, SMB_ACL_GROUP_OBJ
, NULL
);
2941 if (ace
&& !ace
->perms
) {
2942 DLIST_REMOVE(file_ace
, ace
);
2947 num_acls
= count_canon_ace_list(file_ace
);
2948 num_def_acls
= count_canon_ace_list(dir_ace
);
2950 /* Allocate the ace list. */
2951 if ((nt_ace_list
= SMB_MALLOC_ARRAY(SEC_ACE
,num_acls
+ num_profile_acls
+ num_def_acls
)) == NULL
) {
2952 DEBUG(0,("get_nt_acl: Unable to malloc space for nt_ace_list.\n"));
2956 memset(nt_ace_list
, '\0', (num_acls
+ num_def_acls
) * sizeof(SEC_ACE
) );
2959 * Create the NT ACE list from the canonical ace lists.
2962 for (ace
= file_ace
; ace
!= NULL
; ace
= ace
->next
) {
2963 uint32_t acc
= map_canon_ace_perms(SNUM(conn
),
2966 S_ISDIR(sbuf
->st_mode
));
2967 init_sec_ace(&nt_ace_list
[num_aces
++],
2972 SEC_ACE_FLAG_INHERITED_ACE
: 0);
2975 /* The User must have access to a profile share - even
2976 * if we can't map the SID. */
2977 if (lp_profile_acls(SNUM(conn
))) {
2978 init_sec_ace(&nt_ace_list
[num_aces
++],
2979 &global_sid_Builtin_Users
,
2980 SEC_ACE_TYPE_ACCESS_ALLOWED
,
2981 FILE_GENERIC_ALL
, 0);
2984 for (ace
= dir_ace
; ace
!= NULL
; ace
= ace
->next
) {
2985 uint32_t acc
= map_canon_ace_perms(SNUM(conn
),
2988 S_ISDIR(sbuf
->st_mode
));
2989 init_sec_ace(&nt_ace_list
[num_aces
++],
2993 SEC_ACE_FLAG_OBJECT_INHERIT
|
2994 SEC_ACE_FLAG_CONTAINER_INHERIT
|
2995 SEC_ACE_FLAG_INHERIT_ONLY
|
2997 SEC_ACE_FLAG_INHERITED_ACE
: 0));
3000 /* The User must have access to a profile share - even
3001 * if we can't map the SID. */
3002 if (lp_profile_acls(SNUM(conn
))) {
3003 init_sec_ace(&nt_ace_list
[num_aces
++], &global_sid_Builtin_Users
, SEC_ACE_TYPE_ACCESS_ALLOWED
, FILE_GENERIC_ALL
,
3004 SEC_ACE_FLAG_OBJECT_INHERIT
|SEC_ACE_FLAG_CONTAINER_INHERIT
|
3005 SEC_ACE_FLAG_INHERIT_ONLY
|0);
3009 * Merge POSIX default ACLs and normal ACLs into one NT ACE.
3010 * Win2K needs this to get the inheritance correct when replacing ACLs
3011 * on a directory tree. Based on work by Jim @ IBM.
3014 num_aces
= merge_default_aces(nt_ace_list
, num_aces
);
3019 if((psa
= make_sec_acl( talloc_tos(), NT4_ACL_REVISION
, num_aces
, nt_ace_list
)) == NULL
) {
3020 DEBUG(0,("get_nt_acl: Unable to malloc space for acl.\n"));
3024 } /* security_info & DACL_SECURITY_INFORMATION */
3026 psd
= make_standard_sec_desc( talloc_tos(),
3027 (security_info
& OWNER_SECURITY_INFORMATION
) ? &owner_sid
: NULL
,
3028 (security_info
& GROUP_SECURITY_INFORMATION
) ? &group_sid
: NULL
,
3033 DEBUG(0,("get_nt_acl: Unable to malloc space for security descriptor.\n"));
3039 * Windows 2000: The DACL_PROTECTED flag in the security
3040 * descriptor marks the ACL as non-inheriting, i.e., no
3041 * ACEs from higher level directories propagate to this
3042 * ACL. In the POSIX ACL model permissions are only
3043 * inherited at file create time, so ACLs never contain
3044 * any ACEs that are inherited dynamically. The DACL_PROTECTED
3045 * flag doesn't seem to bother Windows NT.
3046 * Always set this if map acl inherit is turned off.
3048 if (get_protected_flag(pal
) || !lp_map_acl_inherit(SNUM(conn
))) {
3049 psd
->type
|= SE_DESC_DACL_PROTECTED
;
3053 dacl_sort_into_canonical_order(psd
->dacl
->aces
, (unsigned int)psd
->dacl
->num_aces
);
3061 SMB_VFS_SYS_ACL_FREE_ACL(conn
, posix_acl
);
3064 SMB_VFS_SYS_ACL_FREE_ACL(conn
, def_acl
);
3066 free_canon_ace_list(file_ace
);
3067 free_canon_ace_list(dir_ace
);
3068 free_inherited_info(pal
);
3069 SAFE_FREE(nt_ace_list
);
3071 return NT_STATUS_OK
;
3074 NTSTATUS
posix_fget_nt_acl(struct files_struct
*fsp
, uint32_t security_info
,
3077 SMB_STRUCT_STAT sbuf
;
3078 SMB_ACL_T posix_acl
= NULL
;
3079 struct pai_val
*pal
;
3083 DEBUG(10,("posix_fget_nt_acl: called for file %s\n", fsp
->fsp_name
));
3085 /* can it happen that fsp_name == NULL ? */
3086 if (fsp
->is_directory
|| fsp
->fh
->fd
== -1) {
3087 return posix_get_nt_acl(fsp
->conn
, fsp
->fsp_name
,
3088 security_info
, ppdesc
);
3091 /* Get the stat struct for the owner info. */
3092 if(SMB_VFS_FSTAT(fsp
, &sbuf
) != 0) {
3093 return map_nt_error_from_unix(errno
);
3096 /* Get the ACL from the fd. */
3097 posix_acl
= SMB_VFS_SYS_ACL_GET_FD(fsp
);
3099 pal
= fload_inherited_info(fsp
);
3101 return posix_get_nt_acl_common(fsp
->conn
, fsp
->fsp_name
, &sbuf
, pal
,
3102 posix_acl
, NULL
, security_info
, ppdesc
);
3105 NTSTATUS
posix_get_nt_acl(struct connection_struct
*conn
, const char *name
,
3106 uint32_t security_info
, SEC_DESC
**ppdesc
)
3108 SMB_STRUCT_STAT sbuf
;
3109 SMB_ACL_T posix_acl
= NULL
;
3110 SMB_ACL_T def_acl
= NULL
;
3111 struct pai_val
*pal
;
3115 DEBUG(10,("posix_get_nt_acl: called for file %s\n", name
));
3117 /* Get the stat struct for the owner info. */
3118 if(SMB_VFS_STAT(conn
, name
, &sbuf
) != 0) {
3119 return map_nt_error_from_unix(errno
);
3122 /* Get the ACL from the path. */
3123 posix_acl
= SMB_VFS_SYS_ACL_GET_FILE(conn
, name
, SMB_ACL_TYPE_ACCESS
);
3125 /* If it's a directory get the default POSIX ACL. */
3126 if(S_ISDIR(sbuf
.st_mode
)) {
3127 def_acl
= SMB_VFS_SYS_ACL_GET_FILE(conn
, name
, SMB_ACL_TYPE_DEFAULT
);
3128 def_acl
= free_empty_sys_acl(conn
, def_acl
);
3131 pal
= load_inherited_info(conn
, name
);
3133 return posix_get_nt_acl_common(conn
, name
, &sbuf
, pal
, posix_acl
,
3134 def_acl
, security_info
, ppdesc
);
3137 /****************************************************************************
3138 Try to chown a file. We will be able to chown it under the following conditions.
3140 1) If we have root privileges, then it will just work.
3141 2) If we have SeTakeOwnershipPrivilege we can change the user to the current user.
3142 3) If we have SeRestorePrivilege we can change the user to any other user.
3143 4) If we have write permission to the file and dos_filemodes is set
3144 then allow chown to the currently authenticated user.
3145 ****************************************************************************/
3147 int try_chown(connection_struct
*conn
, const char *fname
, uid_t uid
, gid_t gid
)
3153 if(!CAN_WRITE(conn
)) {
3158 /* try the direct way first */
3159 ret
= SMB_VFS_CHOWN(conn
, fname
, uid
, gid
);
3163 /* Case (2) / (3) */
3164 if (lp_enable_privileges()) {
3166 bool has_take_ownership_priv
= user_has_privileges(current_user
.nt_user_token
,
3167 &se_take_ownership
);
3168 bool has_restore_priv
= user_has_privileges(current_user
.nt_user_token
,
3172 if ( ( has_take_ownership_priv
&& ( uid
== current_user
.ut
.uid
) ) ||
3174 ( has_restore_priv
) ) {
3177 /* Keep the current file gid the same - take ownership doesn't imply group change. */
3178 ret
= SMB_VFS_CHOWN(conn
, fname
, uid
, (gid_t
)-1);
3185 if (!lp_dos_filemode(SNUM(conn
))) {
3190 if (SMB_VFS_STAT(conn
,fname
,&st
)) {
3194 if (!NT_STATUS_IS_OK(open_file_fchmod(conn
,fname
,&st
,&fsp
))) {
3198 /* only allow chown to the current user. This is more secure,
3199 and also copes with the case where the SID in a take ownership ACL is
3200 a local SID on the users workstation
3202 uid
= current_user
.ut
.uid
;
3205 /* Keep the current file gid the same. */
3206 ret
= SMB_VFS_FCHOWN(fsp
, uid
, (gid_t
)-1);
3209 close_file_fchmod(fsp
);
3214 /****************************************************************************
3215 Take care of parent ACL inheritance.
3216 ****************************************************************************/
3218 NTSTATUS
append_parent_acl(files_struct
*fsp
,
3219 const SEC_DESC
*pcsd
,
3220 SEC_DESC
**pp_new_sd
)
3222 SEC_DESC
*parent_sd
= NULL
;
3223 files_struct
*parent_fsp
= NULL
;
3224 TALLOC_CTX
*mem_ctx
= talloc_tos();
3225 char *parent_name
= NULL
;
3226 SEC_ACE
*new_ace
= NULL
;
3227 unsigned int num_aces
= pcsd
->dacl
->num_aces
;
3228 SMB_STRUCT_STAT sbuf
;
3232 SEC_DESC
*psd
= dup_sec_desc(talloc_tos(), pcsd
);
3233 bool is_dacl_protected
= (pcsd
->type
& SE_DESC_DACL_PROTECTED
);
3238 return NT_STATUS_NO_MEMORY
;
3241 if (!parent_dirname_talloc(mem_ctx
,
3245 return NT_STATUS_NO_MEMORY
;
3248 status
= open_directory(fsp
->conn
,
3252 FILE_READ_ATTRIBUTES
, /* Just a stat open */
3253 FILE_SHARE_NONE
, /* Ignored for stat opens */
3260 if (!NT_STATUS_IS_OK(status
)) {
3264 status
= SMB_VFS_GET_NT_ACL(parent_fsp
->conn
, parent_fsp
->fsp_name
,
3265 DACL_SECURITY_INFORMATION
, &parent_sd
);
3267 close_file(parent_fsp
, NORMAL_CLOSE
);
3269 if (!NT_STATUS_IS_OK(status
)) {
3274 * Make room for potentially all the ACLs from
3275 * the parent. We used to add the ugw triple here,
3276 * as we knew we were dealing with POSIX ACLs.
3277 * We no longer need to do so as we can guarentee
3278 * that a default ACL from the parent directory will
3279 * be well formed for POSIX ACLs if it came from a
3280 * POSIX ACL source, and if we're not writing to a
3281 * POSIX ACL sink then we don't care if it's not well
3285 num_aces
+= parent_sd
->dacl
->num_aces
;
3287 if((new_ace
= TALLOC_ZERO_ARRAY(mem_ctx
, SEC_ACE
,
3288 num_aces
)) == NULL
) {
3289 return NT_STATUS_NO_MEMORY
;
3292 /* Start by copying in all the given ACE entries. */
3293 for (i
= 0; i
< psd
->dacl
->num_aces
; i
++) {
3294 sec_ace_copy(&new_ace
[i
], &psd
->dacl
->aces
[i
]);
3298 * Note that we're ignoring "inherit permissions" here
3299 * as that really only applies to newly created files. JRA.
3302 /* Finally append any inherited ACEs. */
3303 for (j
= 0; j
< parent_sd
->dacl
->num_aces
; j
++) {
3304 SEC_ACE
*se
= &parent_sd
->dacl
->aces
[j
];
3306 if (fsp
->is_directory
) {
3307 if (!(se
->flags
& SEC_ACE_FLAG_CONTAINER_INHERIT
)) {
3308 /* Doesn't apply to a directory - ignore. */
3309 DEBUG(10,("append_parent_acl: directory %s "
3310 "ignoring non container "
3311 "inherit flags %u on ACE with sid %s "
3314 (unsigned int)se
->flags
,
3315 sid_string_dbg(&se
->trustee
),
3320 if (!(se
->flags
& SEC_ACE_FLAG_OBJECT_INHERIT
)) {
3321 /* Doesn't apply to a file - ignore. */
3322 DEBUG(10,("append_parent_acl: file %s "
3323 "ignoring non object "
3324 "inherit flags %u on ACE with sid %s "
3327 (unsigned int)se
->flags
,
3328 sid_string_dbg(&se
->trustee
),
3334 if (is_dacl_protected
) {
3335 /* If the DACL is protected it means we must
3336 * not overwrite an existing ACE entry with the
3337 * same SID. This is order N^2. Ouch :-(. JRA. */
3339 for (k
= 0; k
< psd
->dacl
->num_aces
; k
++) {
3340 if (sid_equal(&psd
->dacl
->aces
[k
].trustee
,
3345 if (k
< psd
->dacl
->num_aces
) {
3346 /* SID matched. Ignore. */
3347 DEBUG(10,("append_parent_acl: path %s "
3348 "ignoring ACE with protected sid %s "
3351 sid_string_dbg(&se
->trustee
),
3357 sec_ace_copy(&new_ace
[i
], se
);
3358 if (se
->flags
& SEC_ACE_FLAG_NO_PROPAGATE_INHERIT
) {
3359 new_ace
[i
].flags
&= ~(SEC_ACE_FLAG_VALID_INHERIT
);
3361 new_ace
[i
].flags
|= SEC_ACE_FLAG_INHERITED_ACE
;
3363 if (fsp
->is_directory
) {
3365 * Strip off any inherit only. It's applied.
3367 new_ace
[i
].flags
&= ~(SEC_ACE_FLAG_INHERIT_ONLY
);
3368 if (se
->flags
& SEC_ACE_FLAG_NO_PROPAGATE_INHERIT
) {
3369 /* No further inheritance. */
3371 ~(SEC_ACE_FLAG_CONTAINER_INHERIT
|
3372 SEC_ACE_FLAG_OBJECT_INHERIT
);
3376 * Strip off any container or inherit
3377 * flags, they can't apply to objects.
3379 new_ace
[i
].flags
&= ~(SEC_ACE_FLAG_CONTAINER_INHERIT
|
3380 SEC_ACE_FLAG_INHERIT_ONLY
|
3381 SEC_ACE_FLAG_NO_PROPAGATE_INHERIT
);
3385 DEBUG(10,("append_parent_acl: path %s "
3386 "inheriting ACE with sid %s "
3389 sid_string_dbg(&se
->trustee
),
3393 psd
->dacl
->aces
= new_ace
;
3394 psd
->dacl
->num_aces
= i
;
3395 psd
->type
&= ~(SE_DESC_DACL_AUTO_INHERITED
|
3396 SE_DESC_DACL_AUTO_INHERIT_REQ
);
3402 /****************************************************************************
3403 Reply to set a security descriptor on an fsp. security_info_sent is the
3404 description of the following NT ACL.
3405 This should be the only external function needed for the UNIX style set ACL.
3406 ****************************************************************************/
3408 NTSTATUS
set_nt_acl(files_struct
*fsp
, uint32 security_info_sent
, const SEC_DESC
*psd
)
3410 connection_struct
*conn
= fsp
->conn
;
3411 uid_t user
= (uid_t
)-1;
3412 gid_t grp
= (gid_t
)-1;
3413 SMB_STRUCT_STAT sbuf
;
3414 DOM_SID file_owner_sid
;
3415 DOM_SID file_grp_sid
;
3416 canon_ace
*file_ace_list
= NULL
;
3417 canon_ace
*dir_ace_list
= NULL
;
3418 bool acl_perms
= False
;
3419 mode_t orig_mode
= (mode_t
)0;
3423 bool need_chown
= False
;
3425 DEBUG(10,("set_nt_acl: called for file %s\n", fsp
->fsp_name
));
3427 if (!CAN_WRITE(conn
)) {
3428 DEBUG(10,("set acl rejected on read-only share\n"));
3429 return NT_STATUS_MEDIA_WRITE_PROTECTED
;
3433 * Get the current state of the file.
3436 if(fsp
->is_directory
|| fsp
->fh
->fd
== -1) {
3437 if(SMB_VFS_STAT(fsp
->conn
,fsp
->fsp_name
, &sbuf
) != 0)
3438 return map_nt_error_from_unix(errno
);
3440 if(SMB_VFS_FSTAT(fsp
, &sbuf
) != 0)
3441 return map_nt_error_from_unix(errno
);
3444 /* Save the original elements we check against. */
3445 orig_mode
= sbuf
.st_mode
;
3446 orig_uid
= sbuf
.st_uid
;
3447 orig_gid
= sbuf
.st_gid
;
3450 * Unpack the user/group/world id's.
3453 status
= unpack_nt_owners( SNUM(conn
), &user
, &grp
, security_info_sent
, psd
);
3454 if (!NT_STATUS_IS_OK(status
)) {
3459 * Do we need to chown ?
3462 if (((user
!= (uid_t
)-1) && (orig_uid
!= user
)) || (( grp
!= (gid_t
)-1) && (orig_gid
!= grp
))) {
3466 if (need_chown
&& (user
== (uid_t
)-1 || user
== current_user
.ut
.uid
)) {
3468 DEBUG(3,("set_nt_acl: chown %s. uid = %u, gid = %u.\n",
3469 fsp
->fsp_name
, (unsigned int)user
, (unsigned int)grp
));
3471 if(try_chown( fsp
->conn
, fsp
->fsp_name
, user
, grp
) == -1) {
3472 DEBUG(3,("set_nt_acl: chown %s, %u, %u failed. Error = %s.\n",
3473 fsp
->fsp_name
, (unsigned int)user
, (unsigned int)grp
, strerror(errno
) ));
3474 if (errno
== EPERM
) {
3475 return NT_STATUS_INVALID_OWNER
;
3477 return map_nt_error_from_unix(errno
);
3481 * Recheck the current state of the file, which may have changed.
3482 * (suid/sgid bits, for instance)
3485 if(fsp
->is_directory
) {
3486 if(SMB_VFS_STAT(fsp
->conn
, fsp
->fsp_name
, &sbuf
) != 0) {
3487 return map_nt_error_from_unix(errno
);
3493 if(fsp
->fh
->fd
== -1)
3494 ret
= SMB_VFS_STAT(fsp
->conn
, fsp
->fsp_name
, &sbuf
);
3496 ret
= SMB_VFS_FSTAT(fsp
, &sbuf
);
3499 return map_nt_error_from_unix(errno
);
3502 /* Save the original elements we check against. */
3503 orig_mode
= sbuf
.st_mode
;
3504 orig_uid
= sbuf
.st_uid
;
3505 orig_gid
= sbuf
.st_gid
;
3507 /* We did chown already, drop the flag */
3511 create_file_sids(&sbuf
, &file_owner_sid
, &file_grp_sid
);
3513 if ((security_info_sent
& DACL_SECURITY_INFORMATION
) &&
3514 psd
->dacl
!= NULL
&&
3515 (psd
->type
& (SE_DESC_DACL_AUTO_INHERITED
|
3516 SE_DESC_DACL_AUTO_INHERIT_REQ
))==
3517 (SE_DESC_DACL_AUTO_INHERITED
|
3518 SE_DESC_DACL_AUTO_INHERIT_REQ
) ) {
3519 SEC_DESC
*new_sd
= NULL
;
3520 status
= append_parent_acl(fsp
, psd
, &new_sd
);
3521 if (!NT_STATUS_IS_OK(status
)) {
3527 acl_perms
= unpack_canon_ace( fsp
, &sbuf
, &file_owner_sid
, &file_grp_sid
,
3528 &file_ace_list
, &dir_ace_list
, security_info_sent
, psd
);
3530 /* Ignore W2K traverse DACL set. */
3531 if (file_ace_list
|| dir_ace_list
) {
3534 DEBUG(3,("set_nt_acl: cannot set permissions\n"));
3535 free_canon_ace_list(file_ace_list
);
3536 free_canon_ace_list(dir_ace_list
);
3537 return NT_STATUS_ACCESS_DENIED
;
3541 * Only change security if we got a DACL.
3544 if((security_info_sent
& DACL_SECURITY_INFORMATION
) && (psd
->dacl
!= NULL
)) {
3546 bool acl_set_support
= False
;
3550 * Try using the POSIX ACL set first. Fall back to chmod if
3551 * we have no ACL support on this filesystem.
3554 if (acl_perms
&& file_ace_list
) {
3555 ret
= set_canon_ace_list(fsp
, file_ace_list
, False
, sbuf
.st_gid
, &acl_set_support
);
3556 if (acl_set_support
&& ret
== False
) {
3557 DEBUG(3,("set_nt_acl: failed to set file acl on file %s (%s).\n", fsp
->fsp_name
, strerror(errno
) ));
3558 free_canon_ace_list(file_ace_list
);
3559 free_canon_ace_list(dir_ace_list
);
3560 return map_nt_error_from_unix(errno
);
3564 if (acl_perms
&& acl_set_support
&& fsp
->is_directory
) {
3566 if (!set_canon_ace_list(fsp
, dir_ace_list
, True
, sbuf
.st_gid
, &acl_set_support
)) {
3567 DEBUG(3,("set_nt_acl: failed to set default acl on directory %s (%s).\n", fsp
->fsp_name
, strerror(errno
) ));
3568 free_canon_ace_list(file_ace_list
);
3569 free_canon_ace_list(dir_ace_list
);
3570 return map_nt_error_from_unix(errno
);
3575 * No default ACL - delete one if it exists.
3578 if (SMB_VFS_SYS_ACL_DELETE_DEF_FILE(conn
, fsp
->fsp_name
) == -1) {
3581 if (acl_group_override(conn
, sbuf
.st_gid
, fsp
->fsp_name
)) {
3582 DEBUG(5,("set_nt_acl: acl group control on and "
3583 "current user in file %s primary group. Override delete_def_acl\n",
3587 sret
= SMB_VFS_SYS_ACL_DELETE_DEF_FILE(conn
, fsp
->fsp_name
);
3592 DEBUG(3,("set_nt_acl: sys_acl_delete_def_file failed (%s)\n", strerror(errno
)));
3593 free_canon_ace_list(file_ace_list
);
3594 free_canon_ace_list(dir_ace_list
);
3595 return map_nt_error_from_unix(errno
);
3601 if (acl_set_support
) {
3602 store_inheritance_attributes(fsp
, file_ace_list
, dir_ace_list
,
3603 (psd
->type
& SE_DESC_DACL_PROTECTED
) ? True
: False
);
3607 * If we cannot set using POSIX ACLs we fall back to checking if we need to chmod.
3610 if(!acl_set_support
&& acl_perms
) {
3613 if (!convert_canon_ace_to_posix_perms( fsp
, file_ace_list
, &posix_perms
)) {
3614 free_canon_ace_list(file_ace_list
);
3615 free_canon_ace_list(dir_ace_list
);
3616 DEBUG(3,("set_nt_acl: failed to convert file acl to posix permissions for file %s.\n",
3618 return NT_STATUS_ACCESS_DENIED
;
3621 if (orig_mode
!= posix_perms
) {
3623 DEBUG(3,("set_nt_acl: chmod %s. perms = 0%o.\n",
3624 fsp
->fsp_name
, (unsigned int)posix_perms
));
3626 if(SMB_VFS_CHMOD(conn
,fsp
->fsp_name
, posix_perms
) == -1) {
3628 if (acl_group_override(conn
, sbuf
.st_gid
, fsp
->fsp_name
)) {
3629 DEBUG(5,("set_nt_acl: acl group control on and "
3630 "current user in file %s primary group. Override chmod\n",
3634 sret
= SMB_VFS_CHMOD(conn
,fsp
->fsp_name
, posix_perms
);
3639 DEBUG(3,("set_nt_acl: chmod %s, 0%o failed. Error = %s.\n",
3640 fsp
->fsp_name
, (unsigned int)posix_perms
, strerror(errno
) ));
3641 free_canon_ace_list(file_ace_list
);
3642 free_canon_ace_list(dir_ace_list
);
3643 return map_nt_error_from_unix(errno
);
3650 free_canon_ace_list(file_ace_list
);
3651 free_canon_ace_list(dir_ace_list
);
3654 /* Any chown pending? */
3656 DEBUG(3,("set_nt_acl: chown %s. uid = %u, gid = %u.\n",
3657 fsp
->fsp_name
, (unsigned int)user
, (unsigned int)grp
));
3659 if(try_chown( fsp
->conn
, fsp
->fsp_name
, user
, grp
) == -1) {
3660 DEBUG(3,("set_nt_acl: chown %s, %u, %u failed. Error = %s.\n",
3661 fsp
->fsp_name
, (unsigned int)user
, (unsigned int)grp
, strerror(errno
) ));
3662 if (errno
== EPERM
) {
3663 return NT_STATUS_INVALID_OWNER
;
3665 return map_nt_error_from_unix(errno
);
3669 return NT_STATUS_OK
;
3672 /****************************************************************************
3673 Get the actual group bits stored on a file with an ACL. Has no effect if
3674 the file has no ACL. Needed in dosmode code where the stat() will return
3675 the mask bits, not the real group bits, for a file with an ACL.
3676 ****************************************************************************/
3678 int get_acl_group_bits( connection_struct
*conn
, const char *fname
, mode_t
*mode
)
3680 int entry_id
= SMB_ACL_FIRST_ENTRY
;
3681 SMB_ACL_ENTRY_T entry
;
3682 SMB_ACL_T posix_acl
;
3685 posix_acl
= SMB_VFS_SYS_ACL_GET_FILE(conn
, fname
, SMB_ACL_TYPE_ACCESS
);
3686 if (posix_acl
== (SMB_ACL_T
)NULL
)
3689 while (SMB_VFS_SYS_ACL_GET_ENTRY(conn
, posix_acl
, entry_id
, &entry
) == 1) {
3690 SMB_ACL_TAG_T tagtype
;
3691 SMB_ACL_PERMSET_T permset
;
3693 entry_id
= SMB_ACL_NEXT_ENTRY
;
3695 if (SMB_VFS_SYS_ACL_GET_TAG_TYPE(conn
, entry
, &tagtype
) ==-1)
3698 if (tagtype
== SMB_ACL_GROUP_OBJ
) {
3699 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn
, entry
, &permset
) == -1) {
3702 *mode
&= ~(S_IRGRP
|S_IWGRP
|S_IXGRP
);
3703 *mode
|= (SMB_VFS_SYS_ACL_GET_PERM(conn
, permset
, SMB_ACL_READ
) ? S_IRGRP
: 0);
3704 *mode
|= (SMB_VFS_SYS_ACL_GET_PERM(conn
, permset
, SMB_ACL_WRITE
) ? S_IWGRP
: 0);
3705 *mode
|= (SMB_VFS_SYS_ACL_GET_PERM(conn
, permset
, SMB_ACL_EXECUTE
) ? S_IXGRP
: 0);
3711 SMB_VFS_SYS_ACL_FREE_ACL(conn
, posix_acl
);
3715 /****************************************************************************
3716 Do a chmod by setting the ACL USER_OBJ, GROUP_OBJ and OTHER bits in an ACL
3717 and set the mask to rwx. Needed to preserve complex ACLs set by NT.
3718 ****************************************************************************/
3720 static int chmod_acl_internals( connection_struct
*conn
, SMB_ACL_T posix_acl
, mode_t mode
)
3722 int entry_id
= SMB_ACL_FIRST_ENTRY
;
3723 SMB_ACL_ENTRY_T entry
;
3724 int num_entries
= 0;
3726 while ( SMB_VFS_SYS_ACL_GET_ENTRY(conn
, posix_acl
, entry_id
, &entry
) == 1) {
3727 SMB_ACL_TAG_T tagtype
;
3728 SMB_ACL_PERMSET_T permset
;
3731 entry_id
= SMB_ACL_NEXT_ENTRY
;
3733 if (SMB_VFS_SYS_ACL_GET_TAG_TYPE(conn
, entry
, &tagtype
) == -1)
3736 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn
, entry
, &permset
) == -1)
3742 case SMB_ACL_USER_OBJ
:
3743 perms
= unix_perms_to_acl_perms(mode
, S_IRUSR
, S_IWUSR
, S_IXUSR
);
3745 case SMB_ACL_GROUP_OBJ
:
3746 perms
= unix_perms_to_acl_perms(mode
, S_IRGRP
, S_IWGRP
, S_IXGRP
);
3750 * FIXME: The ACL_MASK entry permissions should really be set to
3751 * the union of the permissions of all ACL_USER,
3752 * ACL_GROUP_OBJ, and ACL_GROUP entries. That's what
3753 * acl_calc_mask() does, but Samba ACLs doesn't provide it.
3755 perms
= S_IRUSR
|S_IWUSR
|S_IXUSR
;
3758 perms
= unix_perms_to_acl_perms(mode
, S_IROTH
, S_IWOTH
, S_IXOTH
);
3764 if (map_acl_perms_to_permset(conn
, perms
, &permset
) == -1)
3767 if (SMB_VFS_SYS_ACL_SET_PERMSET(conn
, entry
, permset
) == -1)
3772 * If this is a simple 3 element ACL or no elements then it's a standard
3773 * UNIX permission set. Just use chmod...
3776 if ((num_entries
== 3) || (num_entries
== 0))
3782 /****************************************************************************
3783 Get the access ACL of FROM, do a chmod by setting the ACL USER_OBJ,
3784 GROUP_OBJ and OTHER bits in an ACL and set the mask to rwx. Set the
3785 resulting ACL on TO. Note that name is in UNIX character set.
3786 ****************************************************************************/
3788 static int copy_access_posix_acl(connection_struct
*conn
, const char *from
, const char *to
, mode_t mode
)
3790 SMB_ACL_T posix_acl
= NULL
;
3793 if ((posix_acl
= SMB_VFS_SYS_ACL_GET_FILE(conn
, from
, SMB_ACL_TYPE_ACCESS
)) == NULL
)
3796 if ((ret
= chmod_acl_internals(conn
, posix_acl
, mode
)) == -1)
3799 ret
= SMB_VFS_SYS_ACL_SET_FILE(conn
, to
, SMB_ACL_TYPE_ACCESS
, posix_acl
);
3803 SMB_VFS_SYS_ACL_FREE_ACL(conn
, posix_acl
);
3807 /****************************************************************************
3808 Do a chmod by setting the ACL USER_OBJ, GROUP_OBJ and OTHER bits in an ACL
3809 and set the mask to rwx. Needed to preserve complex ACLs set by NT.
3810 Note that name is in UNIX character set.
3811 ****************************************************************************/
3813 int chmod_acl(connection_struct
*conn
, const char *name
, mode_t mode
)
3815 return copy_access_posix_acl(conn
, name
, name
, mode
);
3818 /****************************************************************************
3819 Check for an existing default POSIX ACL on a directory.
3820 ****************************************************************************/
3822 static bool directory_has_default_posix_acl(connection_struct
*conn
, const char *fname
)
3824 SMB_ACL_T def_acl
= SMB_VFS_SYS_ACL_GET_FILE( conn
, fname
, SMB_ACL_TYPE_DEFAULT
);
3825 bool has_acl
= False
;
3826 SMB_ACL_ENTRY_T entry
;
3828 if (def_acl
!= NULL
&& (SMB_VFS_SYS_ACL_GET_ENTRY(conn
, def_acl
, SMB_ACL_FIRST_ENTRY
, &entry
) == 1)) {
3833 SMB_VFS_SYS_ACL_FREE_ACL(conn
, def_acl
);
3838 /****************************************************************************
3839 If the parent directory has no default ACL but it does have an Access ACL,
3840 inherit this Access ACL to file name.
3841 ****************************************************************************/
3843 int inherit_access_posix_acl(connection_struct
*conn
, const char *inherit_from_dir
,
3844 const char *name
, mode_t mode
)
3846 if (directory_has_default_posix_acl(conn
, inherit_from_dir
))
3849 return copy_access_posix_acl(conn
, inherit_from_dir
, name
, mode
);
3852 /****************************************************************************
3853 Do an fchmod by setting the ACL USER_OBJ, GROUP_OBJ and OTHER bits in an ACL
3854 and set the mask to rwx. Needed to preserve complex ACLs set by NT.
3855 ****************************************************************************/
3857 int fchmod_acl(files_struct
*fsp
, mode_t mode
)
3859 connection_struct
*conn
= fsp
->conn
;
3860 SMB_ACL_T posix_acl
= NULL
;
3863 if ((posix_acl
= SMB_VFS_SYS_ACL_GET_FD(fsp
)) == NULL
)
3866 if ((ret
= chmod_acl_internals(conn
, posix_acl
, mode
)) == -1)
3869 ret
= SMB_VFS_SYS_ACL_SET_FD(fsp
, posix_acl
);
3873 SMB_VFS_SYS_ACL_FREE_ACL(conn
, posix_acl
);
3877 /****************************************************************************
3878 Map from wire type to permset.
3879 ****************************************************************************/
3881 static bool unix_ex_wire_to_permset(connection_struct
*conn
, unsigned char wire_perm
, SMB_ACL_PERMSET_T
*p_permset
)
3883 if (wire_perm
& ~(SMB_POSIX_ACL_READ
|SMB_POSIX_ACL_WRITE
|SMB_POSIX_ACL_EXECUTE
)) {
3887 if (SMB_VFS_SYS_ACL_CLEAR_PERMS(conn
, *p_permset
) == -1) {
3891 if (wire_perm
& SMB_POSIX_ACL_READ
) {
3892 if (SMB_VFS_SYS_ACL_ADD_PERM(conn
, *p_permset
, SMB_ACL_READ
) == -1) {
3896 if (wire_perm
& SMB_POSIX_ACL_WRITE
) {
3897 if (SMB_VFS_SYS_ACL_ADD_PERM(conn
, *p_permset
, SMB_ACL_WRITE
) == -1) {
3901 if (wire_perm
& SMB_POSIX_ACL_EXECUTE
) {
3902 if (SMB_VFS_SYS_ACL_ADD_PERM(conn
, *p_permset
, SMB_ACL_EXECUTE
) == -1) {
3909 /****************************************************************************
3910 Map from wire type to tagtype.
3911 ****************************************************************************/
3913 static bool unix_ex_wire_to_tagtype(unsigned char wire_tt
, SMB_ACL_TAG_T
*p_tt
)
3916 case SMB_POSIX_ACL_USER_OBJ
:
3917 *p_tt
= SMB_ACL_USER_OBJ
;
3919 case SMB_POSIX_ACL_USER
:
3920 *p_tt
= SMB_ACL_USER
;
3922 case SMB_POSIX_ACL_GROUP_OBJ
:
3923 *p_tt
= SMB_ACL_GROUP_OBJ
;
3925 case SMB_POSIX_ACL_GROUP
:
3926 *p_tt
= SMB_ACL_GROUP
;
3928 case SMB_POSIX_ACL_MASK
:
3929 *p_tt
= SMB_ACL_MASK
;
3931 case SMB_POSIX_ACL_OTHER
:
3932 *p_tt
= SMB_ACL_OTHER
;
3940 /****************************************************************************
3941 Create a new POSIX acl from wire permissions.
3942 FIXME ! How does the share mask/mode fit into this.... ?
3943 ****************************************************************************/
3945 static SMB_ACL_T
create_posix_acl_from_wire(connection_struct
*conn
, uint16 num_acls
, const char *pdata
)
3948 SMB_ACL_T the_acl
= SMB_VFS_SYS_ACL_INIT(conn
, num_acls
);
3950 if (the_acl
== NULL
) {
3954 for (i
= 0; i
< num_acls
; i
++) {
3955 SMB_ACL_ENTRY_T the_entry
;
3956 SMB_ACL_PERMSET_T the_permset
;
3957 SMB_ACL_TAG_T tag_type
;
3959 if (SMB_VFS_SYS_ACL_CREATE_ENTRY(conn
, &the_acl
, &the_entry
) == -1) {
3960 DEBUG(0,("create_posix_acl_from_wire: Failed to create entry %u. (%s)\n",
3961 i
, strerror(errno
) ));
3965 if (!unix_ex_wire_to_tagtype(CVAL(pdata
,(i
*SMB_POSIX_ACL_ENTRY_SIZE
)), &tag_type
)) {
3966 DEBUG(0,("create_posix_acl_from_wire: invalid wire tagtype %u on entry %u.\n",
3967 CVAL(pdata
,(i
*SMB_POSIX_ACL_ENTRY_SIZE
)), i
));
3971 if (SMB_VFS_SYS_ACL_SET_TAG_TYPE(conn
, the_entry
, tag_type
) == -1) {
3972 DEBUG(0,("create_posix_acl_from_wire: Failed to set tagtype on entry %u. (%s)\n",
3973 i
, strerror(errno
) ));
3977 /* Get the permset pointer from the new ACL entry. */
3978 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn
, the_entry
, &the_permset
) == -1) {
3979 DEBUG(0,("create_posix_acl_from_wire: Failed to get permset on entry %u. (%s)\n",
3980 i
, strerror(errno
) ));
3984 /* Map from wire to permissions. */
3985 if (!unix_ex_wire_to_permset(conn
, CVAL(pdata
,(i
*SMB_POSIX_ACL_ENTRY_SIZE
)+1), &the_permset
)) {
3986 DEBUG(0,("create_posix_acl_from_wire: invalid permset %u on entry %u.\n",
3987 CVAL(pdata
,(i
*SMB_POSIX_ACL_ENTRY_SIZE
) + 1), i
));
3991 /* Now apply to the new ACL entry. */
3992 if (SMB_VFS_SYS_ACL_SET_PERMSET(conn
, the_entry
, the_permset
) == -1) {
3993 DEBUG(0,("create_posix_acl_from_wire: Failed to add permset on entry %u. (%s)\n",
3994 i
, strerror(errno
) ));
3998 if (tag_type
== SMB_ACL_USER
) {
3999 uint32 uidval
= IVAL(pdata
,(i
*SMB_POSIX_ACL_ENTRY_SIZE
)+2);
4000 uid_t uid
= (uid_t
)uidval
;
4001 if (SMB_VFS_SYS_ACL_SET_QUALIFIER(conn
, the_entry
,(void *)&uid
) == -1) {
4002 DEBUG(0,("create_posix_acl_from_wire: Failed to set uid %u on entry %u. (%s)\n",
4003 (unsigned int)uid
, i
, strerror(errno
) ));
4008 if (tag_type
== SMB_ACL_GROUP
) {
4009 uint32 gidval
= IVAL(pdata
,(i
*SMB_POSIX_ACL_ENTRY_SIZE
)+2);
4010 gid_t gid
= (uid_t
)gidval
;
4011 if (SMB_VFS_SYS_ACL_SET_QUALIFIER(conn
, the_entry
,(void *)&gid
) == -1) {
4012 DEBUG(0,("create_posix_acl_from_wire: Failed to set gid %u on entry %u. (%s)\n",
4013 (unsigned int)gid
, i
, strerror(errno
) ));
4023 if (the_acl
!= NULL
) {
4024 SMB_VFS_SYS_ACL_FREE_ACL(conn
, the_acl
);
4029 /****************************************************************************
4030 Calls from UNIX extensions - Default POSIX ACL set.
4031 If num_def_acls == 0 and not a directory just return. If it is a directory
4032 and num_def_acls == 0 then remove the default acl. Else set the default acl
4034 ****************************************************************************/
4036 bool set_unix_posix_default_acl(connection_struct
*conn
, const char *fname
, SMB_STRUCT_STAT
*psbuf
,
4037 uint16 num_def_acls
, const char *pdata
)
4039 SMB_ACL_T def_acl
= NULL
;
4041 if (num_def_acls
&& !S_ISDIR(psbuf
->st_mode
)) {
4042 DEBUG(5,("set_unix_posix_default_acl: Can't set default ACL on non-directory file %s\n", fname
));
4047 if (!num_def_acls
) {
4048 /* Remove the default ACL. */
4049 if (SMB_VFS_SYS_ACL_DELETE_DEF_FILE(conn
, fname
) == -1) {
4050 DEBUG(5,("set_unix_posix_default_acl: acl_delete_def_file failed on directory %s (%s)\n",
4051 fname
, strerror(errno
) ));
4057 if ((def_acl
= create_posix_acl_from_wire(conn
, num_def_acls
, pdata
)) == NULL
) {
4061 if (SMB_VFS_SYS_ACL_SET_FILE(conn
, fname
, SMB_ACL_TYPE_DEFAULT
, def_acl
) == -1) {
4062 DEBUG(5,("set_unix_posix_default_acl: acl_set_file failed on directory %s (%s)\n",
4063 fname
, strerror(errno
) ));
4064 SMB_VFS_SYS_ACL_FREE_ACL(conn
, def_acl
);
4068 DEBUG(10,("set_unix_posix_default_acl: set default acl for file %s\n", fname
));
4069 SMB_VFS_SYS_ACL_FREE_ACL(conn
, def_acl
);
4073 /****************************************************************************
4074 Remove an ACL from a file. As we don't have acl_delete_entry() available
4075 we must read the current acl and copy all entries except MASK, USER and GROUP
4076 to a new acl, then set that. This (at least on Linux) causes any ACL to be
4078 FIXME ! How does the share mask/mode fit into this.... ?
4079 ****************************************************************************/
4081 static bool remove_posix_acl(connection_struct
*conn
, files_struct
*fsp
, const char *fname
)
4083 SMB_ACL_T file_acl
= NULL
;
4084 int entry_id
= SMB_ACL_FIRST_ENTRY
;
4085 SMB_ACL_ENTRY_T entry
;
4087 /* Create a new ACL with only 3 entries, u/g/w. */
4088 SMB_ACL_T new_file_acl
= SMB_VFS_SYS_ACL_INIT(conn
, 3);
4089 SMB_ACL_ENTRY_T user_ent
= NULL
;
4090 SMB_ACL_ENTRY_T group_ent
= NULL
;
4091 SMB_ACL_ENTRY_T other_ent
= NULL
;
4093 if (new_file_acl
== NULL
) {
4094 DEBUG(5,("remove_posix_acl: failed to init new ACL with 3 entries for file %s.\n", fname
));
4098 /* Now create the u/g/w entries. */
4099 if (SMB_VFS_SYS_ACL_CREATE_ENTRY(conn
, &new_file_acl
, &user_ent
) == -1) {
4100 DEBUG(5,("remove_posix_acl: Failed to create user entry for file %s. (%s)\n",
4101 fname
, strerror(errno
) ));
4104 if (SMB_VFS_SYS_ACL_SET_TAG_TYPE(conn
, user_ent
, SMB_ACL_USER_OBJ
) == -1) {
4105 DEBUG(5,("remove_posix_acl: Failed to set user entry for file %s. (%s)\n",
4106 fname
, strerror(errno
) ));
4110 if (SMB_VFS_SYS_ACL_CREATE_ENTRY(conn
, &new_file_acl
, &group_ent
) == -1) {
4111 DEBUG(5,("remove_posix_acl: Failed to create group entry for file %s. (%s)\n",
4112 fname
, strerror(errno
) ));
4115 if (SMB_VFS_SYS_ACL_SET_TAG_TYPE(conn
, group_ent
, SMB_ACL_GROUP_OBJ
) == -1) {
4116 DEBUG(5,("remove_posix_acl: Failed to set group entry for file %s. (%s)\n",
4117 fname
, strerror(errno
) ));
4121 if (SMB_VFS_SYS_ACL_CREATE_ENTRY(conn
, &new_file_acl
, &other_ent
) == -1) {
4122 DEBUG(5,("remove_posix_acl: Failed to create other entry for file %s. (%s)\n",
4123 fname
, strerror(errno
) ));
4126 if (SMB_VFS_SYS_ACL_SET_TAG_TYPE(conn
, other_ent
, SMB_ACL_OTHER
) == -1) {
4127 DEBUG(5,("remove_posix_acl: Failed to set other entry for file %s. (%s)\n",
4128 fname
, strerror(errno
) ));
4132 /* Get the current file ACL. */
4133 if (fsp
&& fsp
->fh
->fd
!= -1) {
4134 file_acl
= SMB_VFS_SYS_ACL_GET_FD(fsp
);
4136 file_acl
= SMB_VFS_SYS_ACL_GET_FILE( conn
, fname
, SMB_ACL_TYPE_ACCESS
);
4139 if (file_acl
== NULL
) {
4140 /* This is only returned if an error occurred. Even for a file with
4141 no acl a u/g/w acl should be returned. */
4142 DEBUG(5,("remove_posix_acl: failed to get ACL from file %s (%s).\n",
4143 fname
, strerror(errno
) ));
4147 while ( SMB_VFS_SYS_ACL_GET_ENTRY(conn
, file_acl
, entry_id
, &entry
) == 1) {
4148 SMB_ACL_TAG_T tagtype
;
4149 SMB_ACL_PERMSET_T permset
;
4151 entry_id
= SMB_ACL_NEXT_ENTRY
;
4153 if (SMB_VFS_SYS_ACL_GET_TAG_TYPE(conn
, entry
, &tagtype
) == -1) {
4154 DEBUG(5,("remove_posix_acl: failed to get tagtype from ACL on file %s (%s).\n",
4155 fname
, strerror(errno
) ));
4159 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn
, entry
, &permset
) == -1) {
4160 DEBUG(5,("remove_posix_acl: failed to get permset from ACL on file %s (%s).\n",
4161 fname
, strerror(errno
) ));
4165 if (tagtype
== SMB_ACL_USER_OBJ
) {
4166 if (SMB_VFS_SYS_ACL_SET_PERMSET(conn
, user_ent
, permset
) == -1) {
4167 DEBUG(5,("remove_posix_acl: failed to set permset from ACL on file %s (%s).\n",
4168 fname
, strerror(errno
) ));
4170 } else if (tagtype
== SMB_ACL_GROUP_OBJ
) {
4171 if (SMB_VFS_SYS_ACL_SET_PERMSET(conn
, group_ent
, permset
) == -1) {
4172 DEBUG(5,("remove_posix_acl: failed to set permset from ACL on file %s (%s).\n",
4173 fname
, strerror(errno
) ));
4175 } else if (tagtype
== SMB_ACL_OTHER
) {
4176 if (SMB_VFS_SYS_ACL_SET_PERMSET(conn
, other_ent
, permset
) == -1) {
4177 DEBUG(5,("remove_posix_acl: failed to set permset from ACL on file %s (%s).\n",
4178 fname
, strerror(errno
) ));
4183 /* Set the new empty file ACL. */
4184 if (fsp
&& fsp
->fh
->fd
!= -1) {
4185 if (SMB_VFS_SYS_ACL_SET_FD(fsp
, new_file_acl
) == -1) {
4186 DEBUG(5,("remove_posix_acl: acl_set_file failed on %s (%s)\n",
4187 fname
, strerror(errno
) ));
4191 if (SMB_VFS_SYS_ACL_SET_FILE(conn
, fname
, SMB_ACL_TYPE_ACCESS
, new_file_acl
) == -1) {
4192 DEBUG(5,("remove_posix_acl: acl_set_file failed on %s (%s)\n",
4193 fname
, strerror(errno
) ));
4203 SMB_VFS_SYS_ACL_FREE_ACL(conn
, file_acl
);
4206 SMB_VFS_SYS_ACL_FREE_ACL(conn
, new_file_acl
);
4211 /****************************************************************************
4212 Calls from UNIX extensions - POSIX ACL set.
4213 If num_def_acls == 0 then read/modify/write acl after removing all entries
4214 except SMB_ACL_USER_OBJ, SMB_ACL_GROUP_OBJ, SMB_ACL_OTHER.
4215 ****************************************************************************/
4217 bool set_unix_posix_acl(connection_struct
*conn
, files_struct
*fsp
, const char *fname
, uint16 num_acls
, const char *pdata
)
4219 SMB_ACL_T file_acl
= NULL
;
4222 /* Remove the ACL from the file. */
4223 return remove_posix_acl(conn
, fsp
, fname
);
4226 if ((file_acl
= create_posix_acl_from_wire(conn
, num_acls
, pdata
)) == NULL
) {
4230 if (fsp
&& fsp
->fh
->fd
!= -1) {
4231 /* The preferred way - use an open fd. */
4232 if (SMB_VFS_SYS_ACL_SET_FD(fsp
, file_acl
) == -1) {
4233 DEBUG(5,("set_unix_posix_acl: acl_set_file failed on %s (%s)\n",
4234 fname
, strerror(errno
) ));
4235 SMB_VFS_SYS_ACL_FREE_ACL(conn
, file_acl
);
4239 if (SMB_VFS_SYS_ACL_SET_FILE(conn
, fname
, SMB_ACL_TYPE_ACCESS
, file_acl
) == -1) {
4240 DEBUG(5,("set_unix_posix_acl: acl_set_file failed on %s (%s)\n",
4241 fname
, strerror(errno
) ));
4242 SMB_VFS_SYS_ACL_FREE_ACL(conn
, file_acl
);
4247 DEBUG(10,("set_unix_posix_acl: set acl for file %s\n", fname
));
4248 SMB_VFS_SYS_ACL_FREE_ACL(conn
, file_acl
);
4252 /********************************************************************
4253 Pull the NT ACL from a file on disk or the OpenEventlog() access
4254 check. Caller is responsible for freeing the returned security
4255 descriptor via TALLOC_FREE(). This is designed for dealing with
4256 user space access checks in smbd outside of the VFS. For example,
4257 checking access rights in OpenEventlog().
4259 Assume we are dealing with files (for now)
4260 ********************************************************************/
4262 SEC_DESC
*get_nt_acl_no_snum( TALLOC_CTX
*ctx
, const char *fname
)
4264 SEC_DESC
*psd
, *ret_sd
;
4265 connection_struct
*conn
;
4267 struct fd_handle fh
;
4269 conn
= TALLOC_ZERO_P(ctx
, connection_struct
);
4271 DEBUG(0, ("talloc failed\n"));
4275 if (!(conn
->params
= TALLOC_P(conn
, struct share_params
))) {
4276 DEBUG(0,("get_nt_acl_no_snum: talloc() failed!\n"));
4281 conn
->params
->service
= -1;
4283 set_conn_connectpath(conn
, "/");
4285 if (!smbd_vfs_init(conn
)) {
4286 DEBUG(0,("get_nt_acl_no_snum: Unable to create a fake connection struct!\n"));
4287 conn_free_internal( conn
);
4291 ZERO_STRUCT( finfo
);
4298 finfo
.fsp_name
= CONST_DISCARD(char *,fname
);
4300 if (!NT_STATUS_IS_OK(posix_fget_nt_acl( &finfo
, DACL_SECURITY_INFORMATION
, &psd
))) {
4301 DEBUG(0,("get_nt_acl_no_snum: get_nt_acl returned zero.\n"));
4302 conn_free_internal( conn
);
4306 ret_sd
= dup_sec_desc( ctx
, psd
);
4308 conn_free_internal( conn
);