2 Unix SMB/CIFS implementation.
3 SMB NT Security Descriptor / Unix permission conversion.
4 Copyright (C) Jeremy Allison 1994-2000.
5 Copyright (C) Andreas Gruenbacher 2002.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24 extern struct current_user current_user;
25 extern struct generic_mapping file_generic_mapping;
28 #define DBGC_CLASS DBGC_ACLS
30 /****************************************************************************
31 Data structures representing the internal ACE format.
32 ****************************************************************************/
34 enum ace_owner {UID_ACE, GID_ACE, WORLD_ACE};
35 enum ace_attribute {ALLOW_ACE, DENY_ACE}; /* Used for incoming NT ACLS. */
37 typedef union posix_id {
43 typedef struct canon_ace {
44 struct canon_ace *next, *prev;
46 mode_t perms; /* Only use S_I(R|W|X)USR mode bits here. */
48 enum ace_owner owner_type;
49 enum ace_attribute attr;
54 #define ALL_ACE_PERMS (S_IRUSR|S_IWUSR|S_IXUSR)
57 * EA format of user.SAMBA_PAI (Samba_Posix_Acl_Interitance)
60 * | 1 | 1 | 2 | 2 | ....
61 * +------+------+-------------+---------------------+-------------+--------------------+
62 * | vers | flag | num_entries | num_default_entries | ..entries.. | default_entries... |
63 * +------+------+-------------+---------------------+-------------+--------------------+
66 #define PAI_VERSION_OFFSET 0
67 #define PAI_FLAG_OFFSET 1
68 #define PAI_NUM_ENTRIES_OFFSET 2
69 #define PAI_NUM_DEFAULT_ENTRIES_OFFSET 4
70 #define PAI_ENTRIES_BASE 6
73 #define PAI_ACL_FLAG_PROTECTED 0x1
74 #define PAI_ENTRY_LENGTH 5
77 * In memory format of user.SAMBA_PAI attribute.
81 struct pai_entry *next, *prev;
82 enum ace_owner owner_type;
88 unsigned int num_entries;
89 struct pai_entry *entry_list;
90 unsigned int num_def_entries;
91 struct pai_entry *def_entry_list;
94 /************************************************************************
95 Return a uint32 of the pai_entry principal.
96 ************************************************************************/
98 static uint32 get_pai_entry_val(struct pai_entry *paie)
100 switch (paie->owner_type) {
102 DEBUG(10,("get_pai_entry_val: uid = %u\n", (unsigned int)paie->unix_ug.uid ));
103 return (uint32)paie->unix_ug.uid;
105 DEBUG(10,("get_pai_entry_val: gid = %u\n", (unsigned int)paie->unix_ug.gid ));
106 return (uint32)paie->unix_ug.gid;
109 DEBUG(10,("get_pai_entry_val: world ace\n"));
114 /************************************************************************
115 Return a uint32 of the entry principal.
116 ************************************************************************/
118 static uint32 get_entry_val(canon_ace *ace_entry)
120 switch (ace_entry->owner_type) {
122 DEBUG(10,("get_entry_val: uid = %u\n", (unsigned int)ace_entry->unix_ug.uid ));
123 return (uint32)ace_entry->unix_ug.uid;
125 DEBUG(10,("get_entry_val: gid = %u\n", (unsigned int)ace_entry->unix_ug.gid ));
126 return (uint32)ace_entry->unix_ug.gid;
129 DEBUG(10,("get_entry_val: world ace\n"));
134 /************************************************************************
135 Count the inherited entries.
136 ************************************************************************/
138 static unsigned int num_inherited_entries(canon_ace *ace_list)
140 unsigned int num_entries = 0;
142 for (; ace_list; ace_list = ace_list->next)
143 if (ace_list->inherited)
148 /************************************************************************
149 Create the on-disk format. Caller must free.
150 ************************************************************************/
152 static char *create_pai_buf(canon_ace *file_ace_list, canon_ace *dir_ace_list, BOOL pai_protected, size_t *store_size)
154 char *pai_buf = NULL;
155 canon_ace *ace_list = NULL;
156 char *entry_offset = NULL;
157 unsigned int num_entries = 0;
158 unsigned int num_def_entries = 0;
160 for (ace_list = file_ace_list; ace_list; ace_list = ace_list->next)
161 if (ace_list->inherited)
164 for (ace_list = dir_ace_list; ace_list; ace_list = ace_list->next)
165 if (ace_list->inherited)
168 DEBUG(10,("create_pai_buf: num_entries = %u, num_def_entries = %u\n", num_entries, num_def_entries ));
170 *store_size = PAI_ENTRIES_BASE + ((num_entries + num_def_entries)*PAI_ENTRY_LENGTH);
172 pai_buf = SMB_MALLOC(*store_size);
177 /* Set up the header. */
178 memset(pai_buf, '\0', PAI_ENTRIES_BASE);
179 SCVAL(pai_buf,PAI_VERSION_OFFSET,PAI_VERSION);
180 SCVAL(pai_buf,PAI_FLAG_OFFSET,(pai_protected ? PAI_ACL_FLAG_PROTECTED : 0));
181 SSVAL(pai_buf,PAI_NUM_ENTRIES_OFFSET,num_entries);
182 SSVAL(pai_buf,PAI_NUM_DEFAULT_ENTRIES_OFFSET,num_def_entries);
184 entry_offset = pai_buf + PAI_ENTRIES_BASE;
186 for (ace_list = file_ace_list; ace_list; ace_list = ace_list->next) {
187 if (ace_list->inherited) {
188 uint8 type_val = (unsigned char)ace_list->owner_type;
189 uint32 entry_val = get_entry_val(ace_list);
191 SCVAL(entry_offset,0,type_val);
192 SIVAL(entry_offset,1,entry_val);
193 entry_offset += PAI_ENTRY_LENGTH;
197 for (ace_list = dir_ace_list; ace_list; ace_list = ace_list->next) {
198 if (ace_list->inherited) {
199 uint8 type_val = (unsigned char)ace_list->owner_type;
200 uint32 entry_val = get_entry_val(ace_list);
202 SCVAL(entry_offset,0,type_val);
203 SIVAL(entry_offset,1,entry_val);
204 entry_offset += PAI_ENTRY_LENGTH;
211 /************************************************************************
212 Store the user.SAMBA_PAI attribute on disk.
213 ************************************************************************/
215 static void store_inheritance_attributes(files_struct *fsp, canon_ace *file_ace_list,
216 canon_ace *dir_ace_list, BOOL pai_protected)
222 if (!lp_map_acl_inherit(SNUM(fsp->conn)))
226 * Don't store if this ACL isn't protected and
227 * none of the entries in it are marked as inherited.
230 if (!pai_protected && num_inherited_entries(file_ace_list) == 0 && num_inherited_entries(dir_ace_list) == 0) {
231 /* Instead just remove the attribute if it exists. */
232 if (fsp->fh->fd != -1)
233 SMB_VFS_FREMOVEXATTR(fsp, fsp->fh->fd, SAMBA_POSIX_INHERITANCE_EA_NAME);
235 SMB_VFS_REMOVEXATTR(fsp->conn, fsp->fsp_name, SAMBA_POSIX_INHERITANCE_EA_NAME);
239 pai_buf = create_pai_buf(file_ace_list, dir_ace_list, pai_protected, &store_size);
241 if (fsp->fh->fd != -1)
242 ret = SMB_VFS_FSETXATTR(fsp, fsp->fh->fd, SAMBA_POSIX_INHERITANCE_EA_NAME,
243 pai_buf, store_size, 0);
245 ret = SMB_VFS_SETXATTR(fsp->conn,fsp->fsp_name, SAMBA_POSIX_INHERITANCE_EA_NAME,
246 pai_buf, store_size, 0);
250 DEBUG(10,("store_inheritance_attribute:%s for file %s\n", pai_protected ? " (protected)" : "", fsp->fsp_name));
251 if (ret == -1 && !no_acl_syscall_error(errno))
252 DEBUG(1,("store_inheritance_attribute: Error %s\n", strerror(errno) ));
255 /************************************************************************
256 Delete the in memory inheritance info.
257 ************************************************************************/
259 static void free_inherited_info(struct pai_val *pal)
262 struct pai_entry *paie, *paie_next;
263 for (paie = pal->entry_list; paie; paie = paie_next) {
264 paie_next = paie->next;
267 for (paie = pal->def_entry_list; paie; paie = paie_next) {
268 paie_next = paie->next;
275 /************************************************************************
276 Was this ACL protected ?
277 ************************************************************************/
279 static BOOL get_protected_flag(struct pai_val *pal)
283 return pal->pai_protected;
286 /************************************************************************
287 Was this ACE inherited ?
288 ************************************************************************/
290 static BOOL get_inherited_flag(struct pai_val *pal, canon_ace *ace_entry, BOOL default_ace)
292 struct pai_entry *paie;
297 /* If the entry exists it is inherited. */
298 for (paie = (default_ace ? pal->def_entry_list : pal->entry_list); paie; paie = paie->next) {
299 if (ace_entry->owner_type == paie->owner_type &&
300 get_entry_val(ace_entry) == get_pai_entry_val(paie))
306 /************************************************************************
307 Ensure an attribute just read is valid.
308 ************************************************************************/
310 static BOOL check_pai_ok(char *pai_buf, size_t pai_buf_data_size)
313 uint16 num_def_entries;
315 if (pai_buf_data_size < PAI_ENTRIES_BASE) {
316 /* Corrupted - too small. */
320 if (CVAL(pai_buf,PAI_VERSION_OFFSET) != PAI_VERSION)
323 num_entries = SVAL(pai_buf,PAI_NUM_ENTRIES_OFFSET);
324 num_def_entries = SVAL(pai_buf,PAI_NUM_DEFAULT_ENTRIES_OFFSET);
326 /* Check the entry lists match. */
327 /* Each entry is 5 bytes (type plus 4 bytes of uid or gid). */
329 if (((num_entries + num_def_entries)*PAI_ENTRY_LENGTH) + PAI_ENTRIES_BASE != pai_buf_data_size)
336 /************************************************************************
337 Convert to in-memory format.
338 ************************************************************************/
340 static struct pai_val *create_pai_val(char *buf, size_t size)
343 struct pai_val *paiv = NULL;
346 if (!check_pai_ok(buf, size))
349 paiv = SMB_MALLOC_P(struct pai_val);
353 memset(paiv, '\0', sizeof(struct pai_val));
355 paiv->pai_protected = (CVAL(buf,PAI_FLAG_OFFSET) == PAI_ACL_FLAG_PROTECTED);
357 paiv->num_entries = SVAL(buf,PAI_NUM_ENTRIES_OFFSET);
358 paiv->num_def_entries = SVAL(buf,PAI_NUM_DEFAULT_ENTRIES_OFFSET);
360 entry_offset = buf + PAI_ENTRIES_BASE;
362 DEBUG(10,("create_pai_val:%s num_entries = %u, num_def_entries = %u\n",
363 paiv->pai_protected ? " (pai_protected)" : "", paiv->num_entries, paiv->num_def_entries ));
365 for (i = 0; i < paiv->num_entries; i++) {
366 struct pai_entry *paie;
368 paie = SMB_MALLOC_P(struct pai_entry);
370 free_inherited_info(paiv);
374 paie->owner_type = (enum ace_owner)CVAL(entry_offset,0);
375 switch( paie->owner_type) {
377 paie->unix_ug.uid = (uid_t)IVAL(entry_offset,1);
378 DEBUG(10,("create_pai_val: uid = %u\n", (unsigned int)paie->unix_ug.uid ));
381 paie->unix_ug.gid = (gid_t)IVAL(entry_offset,1);
382 DEBUG(10,("create_pai_val: gid = %u\n", (unsigned int)paie->unix_ug.gid ));
385 paie->unix_ug.world = -1;
386 DEBUG(10,("create_pai_val: world ace\n"));
389 free_inherited_info(paiv);
392 entry_offset += PAI_ENTRY_LENGTH;
393 DLIST_ADD(paiv->entry_list, paie);
396 for (i = 0; i < paiv->num_def_entries; i++) {
397 struct pai_entry *paie;
399 paie = SMB_MALLOC_P(struct pai_entry);
401 free_inherited_info(paiv);
405 paie->owner_type = (enum ace_owner)CVAL(entry_offset,0);
406 switch( paie->owner_type) {
408 paie->unix_ug.uid = (uid_t)IVAL(entry_offset,1);
409 DEBUG(10,("create_pai_val: (def) uid = %u\n", (unsigned int)paie->unix_ug.uid ));
412 paie->unix_ug.gid = (gid_t)IVAL(entry_offset,1);
413 DEBUG(10,("create_pai_val: (def) gid = %u\n", (unsigned int)paie->unix_ug.gid ));
416 paie->unix_ug.world = -1;
417 DEBUG(10,("create_pai_val: (def) world ace\n"));
420 free_inherited_info(paiv);
423 entry_offset += PAI_ENTRY_LENGTH;
424 DLIST_ADD(paiv->def_entry_list, paie);
430 /************************************************************************
431 Load the user.SAMBA_PAI attribute.
432 ************************************************************************/
434 static struct pai_val *load_inherited_info(files_struct *fsp)
437 size_t pai_buf_size = 1024;
438 struct pai_val *paiv = NULL;
441 if (!lp_map_acl_inherit(SNUM(fsp->conn)))
444 if ((pai_buf = SMB_MALLOC(pai_buf_size)) == NULL)
448 if (fsp->fh->fd != -1)
449 ret = SMB_VFS_FGETXATTR(fsp, fsp->fh->fd, SAMBA_POSIX_INHERITANCE_EA_NAME,
450 pai_buf, pai_buf_size);
452 ret = SMB_VFS_GETXATTR(fsp->conn,fsp->fsp_name,SAMBA_POSIX_INHERITANCE_EA_NAME,
453 pai_buf, pai_buf_size);
456 if (errno != ERANGE) {
459 /* Buffer too small - enlarge it. */
462 if (pai_buf_size > 1024*1024) {
463 return NULL; /* Limit malloc to 1mb. */
465 if ((pai_buf = SMB_MALLOC(pai_buf_size)) == NULL)
470 DEBUG(10,("load_inherited_info: ret = %lu for file %s\n", (unsigned long)ret, fsp->fsp_name));
473 /* No attribute or not supported. */
475 if (errno != ENOATTR)
476 DEBUG(10,("load_inherited_info: Error %s\n", strerror(errno) ));
479 DEBUG(10,("load_inherited_info: Error %s\n", strerror(errno) ));
485 paiv = create_pai_val(pai_buf, ret);
487 if (paiv && paiv->pai_protected)
488 DEBUG(10,("load_inherited_info: ACL is protected for file %s\n", fsp->fsp_name));
494 /****************************************************************************
495 Functions to manipulate the internal ACE format.
496 ****************************************************************************/
498 /****************************************************************************
499 Count a linked list of canonical ACE entries.
500 ****************************************************************************/
502 static size_t count_canon_ace_list( canon_ace *list_head )
507 for (ace = list_head; ace; ace = ace->next)
513 /****************************************************************************
514 Free a linked list of canonical ACE entries.
515 ****************************************************************************/
517 static void free_canon_ace_list( canon_ace *list_head )
520 canon_ace *old_head = list_head;
521 DLIST_REMOVE(list_head, list_head);
526 /****************************************************************************
527 Function to duplicate a canon_ace entry.
528 ****************************************************************************/
530 static canon_ace *dup_canon_ace( canon_ace *src_ace)
532 canon_ace *dst_ace = SMB_MALLOC_P(canon_ace);
538 dst_ace->prev = dst_ace->next = NULL;
542 /****************************************************************************
543 Print out a canon ace.
544 ****************************************************************************/
546 static void print_canon_ace(canon_ace *pace, int num)
550 dbgtext( "canon_ace index %d. Type = %s ", num, pace->attr == ALLOW_ACE ? "allow" : "deny" );
551 dbgtext( "SID = %s ", sid_to_string( str, &pace->trustee));
552 if (pace->owner_type == UID_ACE) {
553 const char *u_name = uidtoname(pace->unix_ug.uid);
554 dbgtext( "uid %u (%s) ", (unsigned int)pace->unix_ug.uid, u_name );
555 } else if (pace->owner_type == GID_ACE) {
556 char *g_name = gidtoname(pace->unix_ug.gid);
557 dbgtext( "gid %u (%s) ", (unsigned int)pace->unix_ug.gid, g_name );
560 switch (pace->type) {
562 dbgtext( "SMB_ACL_USER ");
564 case SMB_ACL_USER_OBJ:
565 dbgtext( "SMB_ACL_USER_OBJ ");
568 dbgtext( "SMB_ACL_GROUP ");
570 case SMB_ACL_GROUP_OBJ:
571 dbgtext( "SMB_ACL_GROUP_OBJ ");
574 dbgtext( "SMB_ACL_OTHER ");
578 dbgtext( "(inherited) ");
580 dbgtext( "%c", pace->perms & S_IRUSR ? 'r' : '-');
581 dbgtext( "%c", pace->perms & S_IWUSR ? 'w' : '-');
582 dbgtext( "%c\n", pace->perms & S_IXUSR ? 'x' : '-');
585 /****************************************************************************
586 Print out a canon ace list.
587 ****************************************************************************/
589 static void print_canon_ace_list(const char *name, canon_ace *ace_list)
593 if( DEBUGLVL( 10 )) {
594 dbgtext( "print_canon_ace_list: %s\n", name );
595 for (;ace_list; ace_list = ace_list->next, count++)
596 print_canon_ace(ace_list, count );
600 /****************************************************************************
601 Map POSIX ACL perms to canon_ace permissions (a mode_t containing only S_(R|W|X)USR bits).
602 ****************************************************************************/
604 static mode_t convert_permset_to_mode_t(connection_struct *conn, SMB_ACL_PERMSET_T permset)
608 ret |= (SMB_VFS_SYS_ACL_GET_PERM(conn, permset, SMB_ACL_READ) ? S_IRUSR : 0);
609 ret |= (SMB_VFS_SYS_ACL_GET_PERM(conn, permset, SMB_ACL_WRITE) ? S_IWUSR : 0);
610 ret |= (SMB_VFS_SYS_ACL_GET_PERM(conn, permset, SMB_ACL_EXECUTE) ? S_IXUSR : 0);
615 /****************************************************************************
616 Map generic UNIX permissions to canon_ace permissions (a mode_t containing only S_(R|W|X)USR bits).
617 ****************************************************************************/
619 static mode_t unix_perms_to_acl_perms(mode_t mode, int r_mask, int w_mask, int x_mask)
633 /****************************************************************************
634 Map canon_ace permissions (a mode_t containing only S_(R|W|X)USR bits) to
635 an SMB_ACL_PERMSET_T.
636 ****************************************************************************/
638 static int map_acl_perms_to_permset(connection_struct *conn, mode_t mode, SMB_ACL_PERMSET_T *p_permset)
640 if (SMB_VFS_SYS_ACL_CLEAR_PERMS(conn, *p_permset) == -1)
642 if (mode & S_IRUSR) {
643 if (SMB_VFS_SYS_ACL_ADD_PERM(conn, *p_permset, SMB_ACL_READ) == -1)
646 if (mode & S_IWUSR) {
647 if (SMB_VFS_SYS_ACL_ADD_PERM(conn, *p_permset, SMB_ACL_WRITE) == -1)
650 if (mode & S_IXUSR) {
651 if (SMB_VFS_SYS_ACL_ADD_PERM(conn, *p_permset, SMB_ACL_EXECUTE) == -1)
656 /****************************************************************************
657 Function to create owner and group SIDs from a SMB_STRUCT_STAT.
658 ****************************************************************************/
660 static void create_file_sids(SMB_STRUCT_STAT *psbuf, DOM_SID *powner_sid, DOM_SID *pgroup_sid)
662 uid_to_sid( powner_sid, psbuf->st_uid );
663 gid_to_sid( pgroup_sid, psbuf->st_gid );
666 /****************************************************************************
667 Merge aces with a common sid - if both are allow or deny, OR the permissions together and
668 delete the second one. If the first is deny, mask the permissions off and delete the allow
669 if the permissions become zero, delete the deny if the permissions are non zero.
670 ****************************************************************************/
672 static void merge_aces( canon_ace **pp_list_head )
674 canon_ace *list_head = *pp_list_head;
675 canon_ace *curr_ace_outer;
676 canon_ace *curr_ace_outer_next;
679 * First, merge allow entries with identical SIDs, and deny entries
680 * with identical SIDs.
683 for (curr_ace_outer = list_head; curr_ace_outer; curr_ace_outer = curr_ace_outer_next) {
685 canon_ace *curr_ace_next;
687 curr_ace_outer_next = curr_ace_outer->next; /* Save the link in case we delete. */
689 for (curr_ace = curr_ace_outer->next; curr_ace; curr_ace = curr_ace_next) {
691 curr_ace_next = curr_ace->next; /* Save the link in case of delete. */
693 if (sid_equal(&curr_ace->trustee, &curr_ace_outer->trustee) &&
694 (curr_ace->attr == curr_ace_outer->attr)) {
696 if( DEBUGLVL( 10 )) {
697 dbgtext("merge_aces: Merging ACE's\n");
698 print_canon_ace( curr_ace_outer, 0);
699 print_canon_ace( curr_ace, 0);
702 /* Merge two allow or two deny ACE's. */
704 curr_ace_outer->perms |= curr_ace->perms;
705 DLIST_REMOVE(list_head, curr_ace);
707 curr_ace_outer_next = curr_ace_outer->next; /* We may have deleted the link. */
713 * Now go through and mask off allow permissions with deny permissions.
714 * We can delete either the allow or deny here as we know that each SID
715 * appears only once in the list.
718 for (curr_ace_outer = list_head; curr_ace_outer; curr_ace_outer = curr_ace_outer_next) {
720 canon_ace *curr_ace_next;
722 curr_ace_outer_next = curr_ace_outer->next; /* Save the link in case we delete. */
724 for (curr_ace = curr_ace_outer->next; curr_ace; curr_ace = curr_ace_next) {
726 curr_ace_next = curr_ace->next; /* Save the link in case of delete. */
729 * Subtract ACE's with different entries. Due to the ordering constraints
730 * we've put on the ACL, we know the deny must be the first one.
733 if (sid_equal(&curr_ace->trustee, &curr_ace_outer->trustee) &&
734 (curr_ace_outer->attr == DENY_ACE) && (curr_ace->attr == ALLOW_ACE)) {
736 if( DEBUGLVL( 10 )) {
737 dbgtext("merge_aces: Masking ACE's\n");
738 print_canon_ace( curr_ace_outer, 0);
739 print_canon_ace( curr_ace, 0);
742 curr_ace->perms &= ~curr_ace_outer->perms;
744 if (curr_ace->perms == 0) {
747 * The deny overrides the allow. Remove the allow.
750 DLIST_REMOVE(list_head, curr_ace);
752 curr_ace_outer_next = curr_ace_outer->next; /* We may have deleted the link. */
757 * Even after removing permissions, there
758 * are still allow permissions - delete the deny.
759 * It is safe to delete the deny here,
760 * as we are guarenteed by the deny first
761 * ordering that all the deny entries for
762 * this SID have already been merged into one
763 * before we can get to an allow ace.
766 DLIST_REMOVE(list_head, curr_ace_outer);
767 SAFE_FREE(curr_ace_outer);
772 } /* end for curr_ace */
773 } /* end for curr_ace_outer */
775 /* We may have modified the list. */
777 *pp_list_head = list_head;
780 /****************************************************************************
781 Check if we need to return NT4.x compatible ACL entries.
782 ****************************************************************************/
784 static BOOL nt4_compatible_acls(void)
786 const char *compat = lp_acl_compatibility();
788 if (*compat == '\0') {
789 enum remote_arch_types ra_type = get_remote_arch();
791 /* Automatically adapt to client */
792 return (ra_type <= RA_WINNT);
794 return (strequal(compat, "winnt"));
798 /****************************************************************************
799 Map canon_ace perms to permission bits NT.
800 The attr element is not used here - we only process deny entries on set,
801 not get. Deny entries are implicit on get with ace->perms = 0.
802 ****************************************************************************/
804 static SEC_ACCESS map_canon_ace_perms(int snum, int *pacl_type, DOM_SID *powner_sid, canon_ace *ace, BOOL directory_ace)
809 *pacl_type = SEC_ACE_TYPE_ACCESS_ALLOWED;
811 if (lp_acl_map_full_control(snum) && ((ace->perms & ALL_ACE_PERMS) == ALL_ACE_PERMS)) {
813 nt_mask = UNIX_DIRECTORY_ACCESS_RWX;
815 nt_mask = UNIX_ACCESS_RWX;
817 } else if ((ace->perms & ALL_ACE_PERMS) == (mode_t)0) {
819 * Windows NT refuses to display ACEs with no permissions in them (but
820 * they are perfectly legal with Windows 2000). If the ACE has empty
821 * permissions we cannot use 0, so we use the otherwise unused
822 * WRITE_OWNER permission, which we ignore when we set an ACL.
823 * We abstract this into a #define of UNIX_ACCESS_NONE to allow this
824 * to be changed in the future.
827 if (nt4_compatible_acls())
828 nt_mask = UNIX_ACCESS_NONE;
833 nt_mask |= ((ace->perms & S_IRUSR) ? UNIX_DIRECTORY_ACCESS_R : 0 );
834 nt_mask |= ((ace->perms & S_IWUSR) ? UNIX_DIRECTORY_ACCESS_W : 0 );
835 nt_mask |= ((ace->perms & S_IXUSR) ? UNIX_DIRECTORY_ACCESS_X : 0 );
837 nt_mask |= ((ace->perms & S_IRUSR) ? UNIX_ACCESS_R : 0 );
838 nt_mask |= ((ace->perms & S_IWUSR) ? UNIX_ACCESS_W : 0 );
839 nt_mask |= ((ace->perms & S_IXUSR) ? UNIX_ACCESS_X : 0 );
843 DEBUG(10,("map_canon_ace_perms: Mapped (UNIX) %x to (NT) %x\n",
844 (unsigned int)ace->perms, (unsigned int)nt_mask ));
846 init_sec_access(&sa,nt_mask);
850 /****************************************************************************
851 Map NT perms to a UNIX mode_t.
852 ****************************************************************************/
854 #define FILE_SPECIFIC_READ_BITS (FILE_READ_DATA|FILE_READ_EA|FILE_READ_ATTRIBUTES)
855 #define FILE_SPECIFIC_WRITE_BITS (FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_WRITE_EA|FILE_WRITE_ATTRIBUTES)
856 #define FILE_SPECIFIC_EXECUTE_BITS (FILE_EXECUTE)
858 static mode_t map_nt_perms( SEC_ACCESS sec_access, int type)
864 if(sec_access.mask & GENERIC_ALL_ACCESS)
865 mode = S_IRUSR|S_IWUSR|S_IXUSR;
867 mode |= (sec_access.mask & (GENERIC_READ_ACCESS|FILE_SPECIFIC_READ_BITS)) ? S_IRUSR : 0;
868 mode |= (sec_access.mask & (GENERIC_WRITE_ACCESS|FILE_SPECIFIC_WRITE_BITS)) ? S_IWUSR : 0;
869 mode |= (sec_access.mask & (GENERIC_EXECUTE_ACCESS|FILE_SPECIFIC_EXECUTE_BITS)) ? S_IXUSR : 0;
873 if(sec_access.mask & GENERIC_ALL_ACCESS)
874 mode = S_IRGRP|S_IWGRP|S_IXGRP;
876 mode |= (sec_access.mask & (GENERIC_READ_ACCESS|FILE_SPECIFIC_READ_BITS)) ? S_IRGRP : 0;
877 mode |= (sec_access.mask & (GENERIC_WRITE_ACCESS|FILE_SPECIFIC_WRITE_BITS)) ? S_IWGRP : 0;
878 mode |= (sec_access.mask & (GENERIC_EXECUTE_ACCESS|FILE_SPECIFIC_EXECUTE_BITS)) ? S_IXGRP : 0;
882 if(sec_access.mask & GENERIC_ALL_ACCESS)
883 mode = S_IROTH|S_IWOTH|S_IXOTH;
885 mode |= (sec_access.mask & (GENERIC_READ_ACCESS|FILE_SPECIFIC_READ_BITS)) ? S_IROTH : 0;
886 mode |= (sec_access.mask & (GENERIC_WRITE_ACCESS|FILE_SPECIFIC_WRITE_BITS)) ? S_IWOTH : 0;
887 mode |= (sec_access.mask & (GENERIC_EXECUTE_ACCESS|FILE_SPECIFIC_EXECUTE_BITS)) ? S_IXOTH : 0;
895 /****************************************************************************
896 Unpack a SEC_DESC into a UNIX owner and group.
897 ****************************************************************************/
899 static BOOL unpack_nt_owners(int snum, SMB_STRUCT_STAT *psbuf, uid_t *puser, gid_t *pgrp, uint32 security_info_sent, SEC_DESC *psd)
907 if(security_info_sent == 0) {
908 DEBUG(0,("unpack_nt_owners: no security info sent !\n"));
913 * Validate the owner and group SID's.
916 memset(&owner_sid, '\0', sizeof(owner_sid));
917 memset(&grp_sid, '\0', sizeof(grp_sid));
919 DEBUG(5,("unpack_nt_owners: validating owner_sids.\n"));
922 * Don't immediately fail if the owner sid cannot be validated.
923 * This may be a group chown only set.
926 if (security_info_sent & OWNER_SECURITY_INFORMATION) {
927 sid_copy(&owner_sid, psd->owner_sid);
928 if (!NT_STATUS_IS_OK(sid_to_uid(&owner_sid, puser))) {
929 if (lp_force_unknown_acl_user(snum)) {
930 /* this allows take ownership to work
932 *puser = current_user.uid;
934 DEBUG(3,("unpack_nt_owners: unable to validate"
935 " owner sid for %s\n",
936 sid_string_static(&owner_sid)));
943 * Don't immediately fail if the group sid cannot be validated.
944 * This may be an owner chown only set.
947 if (security_info_sent & GROUP_SECURITY_INFORMATION) {
948 sid_copy(&grp_sid, psd->grp_sid);
949 if (!NT_STATUS_IS_OK(sid_to_gid( &grp_sid, pgrp))) {
950 if (lp_force_unknown_acl_user(snum)) {
951 /* this allows take group ownership to work
953 *pgrp = current_user.gid;
955 DEBUG(3,("unpack_nt_owners: unable to validate"
962 DEBUG(5,("unpack_nt_owners: owner_sids validated.\n"));
967 /****************************************************************************
968 Ensure the enforced permissions for this share apply.
969 ****************************************************************************/
971 static void apply_default_perms(files_struct *fsp, canon_ace *pace, mode_t type)
973 int snum = SNUM(fsp->conn);
974 mode_t and_bits = (mode_t)0;
975 mode_t or_bits = (mode_t)0;
977 /* Get the initial bits to apply. */
979 if (fsp->is_directory) {
980 and_bits = lp_dir_security_mask(snum);
981 or_bits = lp_force_dir_security_mode(snum);
983 and_bits = lp_security_mask(snum);
984 or_bits = lp_force_security_mode(snum);
987 /* Now bounce them into the S_USR space. */
990 /* Ensure owner has read access. */
991 pace->perms |= S_IRUSR;
992 if (fsp->is_directory)
993 pace->perms |= (S_IWUSR|S_IXUSR);
994 and_bits = unix_perms_to_acl_perms(and_bits, S_IRUSR, S_IWUSR, S_IXUSR);
995 or_bits = unix_perms_to_acl_perms(or_bits, S_IRUSR, S_IWUSR, S_IXUSR);
998 and_bits = unix_perms_to_acl_perms(and_bits, S_IRGRP, S_IWGRP, S_IXGRP);
999 or_bits = unix_perms_to_acl_perms(or_bits, S_IRGRP, S_IWGRP, S_IXGRP);
1002 and_bits = unix_perms_to_acl_perms(and_bits, S_IROTH, S_IWOTH, S_IXOTH);
1003 or_bits = unix_perms_to_acl_perms(or_bits, S_IROTH, S_IWOTH, S_IXOTH);
1007 pace->perms = ((pace->perms & and_bits)|or_bits);
1010 /****************************************************************************
1011 Check if a given uid/SID is in a group gid/SID. This is probably very
1012 expensive and will need optimisation. A *lot* of optimisation :-). JRA.
1013 ****************************************************************************/
1015 static BOOL uid_entry_in_group( canon_ace *uid_ace, canon_ace *group_ace )
1020 /* "Everyone" always matches every uid. */
1022 if (sid_equal(&group_ace->trustee, &global_sid_World))
1025 /* Assume that the current user is in the current group (force group) */
1027 if (uid_ace->unix_ug.uid == current_user.uid && group_ace->unix_ug.gid == current_user.gid)
1030 fstrcpy(u_name, uidtoname(uid_ace->unix_ug.uid));
1031 fstrcpy(g_name, gidtoname(group_ace->unix_ug.gid));
1034 * Due to the winbind interfaces we need to do this via names,
1038 return user_in_group_list(u_name, g_name, NULL, 0);
1041 /****************************************************************************
1042 A well formed POSIX file or default ACL has at least 3 entries, a
1043 SMB_ACL_USER_OBJ, SMB_ACL_GROUP_OBJ, SMB_ACL_OTHER_OBJ.
1044 In addition, the owner must always have at least read access.
1045 When using this call on get_acl, the pst struct is valid and contains
1046 the mode of the file. When using this call on set_acl, the pst struct has
1047 been modified to have a mode containing the default for this file or directory
1049 ****************************************************************************/
1051 static BOOL ensure_canon_entry_valid(canon_ace **pp_ace,
1053 const DOM_SID *pfile_owner_sid,
1054 const DOM_SID *pfile_grp_sid,
1055 SMB_STRUCT_STAT *pst,
1059 BOOL got_user = False;
1060 BOOL got_grp = False;
1061 BOOL got_other = False;
1062 canon_ace *pace_other = NULL;
1064 for (pace = *pp_ace; pace; pace = pace->next) {
1065 if (pace->type == SMB_ACL_USER_OBJ) {
1068 apply_default_perms(fsp, pace, S_IRUSR);
1071 } else if (pace->type == SMB_ACL_GROUP_OBJ) {
1074 * Ensure create mask/force create mode is respected on set.
1078 apply_default_perms(fsp, pace, S_IRGRP);
1081 } else if (pace->type == SMB_ACL_OTHER) {
1084 * Ensure create mask/force create mode is respected on set.
1088 apply_default_perms(fsp, pace, S_IROTH);
1095 if ((pace = SMB_MALLOC_P(canon_ace)) == NULL) {
1096 DEBUG(0,("ensure_canon_entry_valid: malloc fail.\n"));
1101 pace->type = SMB_ACL_USER_OBJ;
1102 pace->owner_type = UID_ACE;
1103 pace->unix_ug.uid = pst->st_uid;
1104 pace->trustee = *pfile_owner_sid;
1105 pace->attr = ALLOW_ACE;
1108 /* See if the owning user is in any of the other groups in
1109 the ACE. If so, OR in the permissions from that group. */
1111 BOOL group_matched = False;
1112 canon_ace *pace_iter;
1114 for (pace_iter = *pp_ace; pace_iter; pace_iter = pace_iter->next) {
1115 if (pace_iter->type == SMB_ACL_GROUP_OBJ || pace_iter->type == SMB_ACL_GROUP) {
1116 if (uid_entry_in_group(pace, pace_iter)) {
1117 pace->perms |= pace_iter->perms;
1118 group_matched = True;
1123 /* If we only got an "everyone" perm, just use that. */
1124 if (!group_matched) {
1126 pace->perms = pace_other->perms;
1131 apply_default_perms(fsp, pace, S_IRUSR);
1133 pace->perms = unix_perms_to_acl_perms(pst->st_mode, S_IRUSR, S_IWUSR, S_IXUSR);
1136 DLIST_ADD(*pp_ace, pace);
1140 if ((pace = SMB_MALLOC_P(canon_ace)) == NULL) {
1141 DEBUG(0,("ensure_canon_entry_valid: malloc fail.\n"));
1146 pace->type = SMB_ACL_GROUP_OBJ;
1147 pace->owner_type = GID_ACE;
1148 pace->unix_ug.uid = pst->st_gid;
1149 pace->trustee = *pfile_grp_sid;
1150 pace->attr = ALLOW_ACE;
1152 /* If we only got an "everyone" perm, just use that. */
1154 pace->perms = pace_other->perms;
1157 apply_default_perms(fsp, pace, S_IRGRP);
1159 pace->perms = unix_perms_to_acl_perms(pst->st_mode, S_IRGRP, S_IWGRP, S_IXGRP);
1162 DLIST_ADD(*pp_ace, pace);
1166 if ((pace = SMB_MALLOC_P(canon_ace)) == NULL) {
1167 DEBUG(0,("ensure_canon_entry_valid: malloc fail.\n"));
1172 pace->type = SMB_ACL_OTHER;
1173 pace->owner_type = WORLD_ACE;
1174 pace->unix_ug.world = -1;
1175 pace->trustee = global_sid_World;
1176 pace->attr = ALLOW_ACE;
1179 apply_default_perms(fsp, pace, S_IROTH);
1181 pace->perms = unix_perms_to_acl_perms(pst->st_mode, S_IROTH, S_IWOTH, S_IXOTH);
1183 DLIST_ADD(*pp_ace, pace);
1189 /****************************************************************************
1190 Check if a POSIX ACL has the required SMB_ACL_USER_OBJ and SMB_ACL_GROUP_OBJ entries.
1191 If it does not have them, check if there are any entries where the trustee is the
1192 file owner or the owning group, and map these to SMB_ACL_USER_OBJ and SMB_ACL_GROUP_OBJ.
1193 ****************************************************************************/
1195 static void check_owning_objs(canon_ace *ace, DOM_SID *pfile_owner_sid, DOM_SID *pfile_grp_sid)
1197 BOOL got_user_obj, got_group_obj;
1198 canon_ace *current_ace;
1201 entries = count_canon_ace_list(ace);
1202 got_user_obj = False;
1203 got_group_obj = False;
1205 for (i=0, current_ace = ace; i < entries; i++, current_ace = current_ace->next) {
1206 if (current_ace->type == SMB_ACL_USER_OBJ)
1207 got_user_obj = True;
1208 else if (current_ace->type == SMB_ACL_GROUP_OBJ)
1209 got_group_obj = True;
1211 if (got_user_obj && got_group_obj) {
1212 DEBUG(10,("check_owning_objs: ACL had owning user/group entries.\n"));
1216 for (i=0, current_ace = ace; i < entries; i++, current_ace = current_ace->next) {
1217 if (!got_user_obj && current_ace->owner_type == UID_ACE &&
1218 sid_equal(¤t_ace->trustee, pfile_owner_sid)) {
1219 current_ace->type = SMB_ACL_USER_OBJ;
1220 got_user_obj = True;
1222 if (!got_group_obj && current_ace->owner_type == GID_ACE &&
1223 sid_equal(¤t_ace->trustee, pfile_grp_sid)) {
1224 current_ace->type = SMB_ACL_GROUP_OBJ;
1225 got_group_obj = True;
1229 DEBUG(10,("check_owning_objs: ACL is missing an owner entry.\n"));
1231 DEBUG(10,("check_owning_objs: ACL is missing an owning group entry.\n"));
1234 /****************************************************************************
1235 Unpack a SEC_DESC into two canonical ace lists.
1236 ****************************************************************************/
1238 static BOOL create_canon_ace_lists(files_struct *fsp, SMB_STRUCT_STAT *pst,
1239 DOM_SID *pfile_owner_sid,
1240 DOM_SID *pfile_grp_sid,
1241 canon_ace **ppfile_ace, canon_ace **ppdir_ace,
1244 BOOL all_aces_are_inherit_only = (fsp->is_directory ? True : False);
1245 canon_ace *file_ace = NULL;
1246 canon_ace *dir_ace = NULL;
1247 canon_ace *tmp_ace = NULL;
1248 canon_ace *current_ace = NULL;
1249 BOOL got_dir_allow = False;
1250 BOOL got_file_allow = False;
1257 * Convert the incoming ACL into a more regular form.
1260 for(i = 0; i < dacl->num_aces; i++) {
1261 SEC_ACE *psa = &dacl->ace[i];
1263 if((psa->type != SEC_ACE_TYPE_ACCESS_ALLOWED) && (psa->type != SEC_ACE_TYPE_ACCESS_DENIED)) {
1264 DEBUG(3,("create_canon_ace_lists: unable to set anything but an ALLOW or DENY ACE.\n"));
1268 if (nt4_compatible_acls()) {
1270 * The security mask may be UNIX_ACCESS_NONE which should map into
1271 * no permissions (we overload the WRITE_OWNER bit for this) or it
1272 * should be one of the ALL/EXECUTE/READ/WRITE bits. Arrange for this
1273 * to be so. Any other bits override the UNIX_ACCESS_NONE bit.
1277 * Convert GENERIC bits to specific bits.
1280 se_map_generic(&psa->info.mask, &file_generic_mapping);
1282 psa->info.mask &= (UNIX_ACCESS_NONE|FILE_ALL_ACCESS);
1284 if(psa->info.mask != UNIX_ACCESS_NONE)
1285 psa->info.mask &= ~UNIX_ACCESS_NONE;
1290 * Deal with the fact that NT 4.x re-writes the canonical format
1291 * that we return for default ACLs. If a directory ACE is identical
1292 * to a inherited directory ACE then NT changes the bits so that the
1293 * first ACE is set to OI|IO and the second ACE for this SID is set
1294 * to CI. We need to repair this. JRA.
1297 for(i = 0; i < dacl->num_aces; i++) {
1298 SEC_ACE *psa1 = &dacl->ace[i];
1300 for (j = i + 1; j < dacl->num_aces; j++) {
1301 SEC_ACE *psa2 = &dacl->ace[j];
1303 if (psa1->info.mask != psa2->info.mask)
1306 if (!sid_equal(&psa1->trustee, &psa2->trustee))
1310 * Ok - permission bits and SIDs are equal.
1311 * Check if flags were re-written.
1314 if (psa1->flags & SEC_ACE_FLAG_INHERIT_ONLY) {
1316 psa1->flags |= (psa2->flags & (SEC_ACE_FLAG_CONTAINER_INHERIT|SEC_ACE_FLAG_OBJECT_INHERIT));
1317 psa2->flags &= ~(SEC_ACE_FLAG_CONTAINER_INHERIT|SEC_ACE_FLAG_OBJECT_INHERIT);
1319 } else if (psa2->flags & SEC_ACE_FLAG_INHERIT_ONLY) {
1321 psa2->flags |= (psa1->flags & (SEC_ACE_FLAG_CONTAINER_INHERIT|SEC_ACE_FLAG_OBJECT_INHERIT));
1322 psa1->flags &= ~(SEC_ACE_FLAG_CONTAINER_INHERIT|SEC_ACE_FLAG_OBJECT_INHERIT);
1328 for(i = 0; i < dacl->num_aces; i++) {
1329 SEC_ACE *psa = &dacl->ace[i];
1332 * Ignore non-mappable SIDs (NT Authority, BUILTIN etc).
1335 if (non_mappable_sid(&psa->trustee)) {
1337 DEBUG(10,("create_canon_ace_lists: ignoring non-mappable SID %s\n",
1338 sid_to_string(str, &psa->trustee) ));
1343 * Create a cannon_ace entry representing this NT DACL ACE.
1346 if ((current_ace = SMB_MALLOC_P(canon_ace)) == NULL) {
1347 free_canon_ace_list(file_ace);
1348 free_canon_ace_list(dir_ace);
1349 DEBUG(0,("create_canon_ace_lists: malloc fail.\n"));
1353 ZERO_STRUCTP(current_ace);
1355 sid_copy(¤t_ace->trustee, &psa->trustee);
1358 * Try and work out if the SID is a user or group
1359 * as we need to flag these differently for POSIX.
1360 * Note what kind of a POSIX ACL this should map to.
1363 if( sid_equal(¤t_ace->trustee, &global_sid_World)) {
1364 current_ace->owner_type = WORLD_ACE;
1365 current_ace->unix_ug.world = -1;
1366 current_ace->type = SMB_ACL_OTHER;
1367 } else if (sid_equal(¤t_ace->trustee, &global_sid_Creator_Owner)) {
1368 current_ace->owner_type = UID_ACE;
1369 current_ace->unix_ug.uid = pst->st_uid;
1370 current_ace->type = SMB_ACL_USER_OBJ;
1373 * The Creator Owner entry only specifies inheritable permissions,
1374 * never access permissions. WinNT doesn't always set the ACE to
1375 *INHERIT_ONLY, though.
1378 if (nt4_compatible_acls())
1379 psa->flags |= SEC_ACE_FLAG_INHERIT_ONLY;
1380 } else if (sid_equal(¤t_ace->trustee, &global_sid_Creator_Group)) {
1381 current_ace->owner_type = GID_ACE;
1382 current_ace->unix_ug.gid = pst->st_gid;
1383 current_ace->type = SMB_ACL_GROUP_OBJ;
1386 * The Creator Group entry only specifies inheritable permissions,
1387 * never access permissions. WinNT doesn't always set the ACE to
1388 *INHERIT_ONLY, though.
1390 if (nt4_compatible_acls())
1391 psa->flags |= SEC_ACE_FLAG_INHERIT_ONLY;
1393 } else if (NT_STATUS_IS_OK(sid_to_uid( ¤t_ace->trustee, ¤t_ace->unix_ug.uid))) {
1394 current_ace->owner_type = UID_ACE;
1395 current_ace->type = SMB_ACL_USER;
1396 } else if (NT_STATUS_IS_OK(sid_to_gid( ¤t_ace->trustee, ¤t_ace->unix_ug.gid))) {
1397 current_ace->owner_type = GID_ACE;
1398 current_ace->type = SMB_ACL_GROUP;
1402 free_canon_ace_list(file_ace);
1403 free_canon_ace_list(dir_ace);
1404 DEBUG(0,("create_canon_ace_lists: unable to map SID %s to uid or gid.\n",
1405 sid_to_string(str, ¤t_ace->trustee) ));
1406 SAFE_FREE(current_ace);
1411 * Map the given NT permissions into a UNIX mode_t containing only
1412 * S_I(R|W|X)USR bits.
1415 current_ace->perms |= map_nt_perms( psa->info, S_IRUSR);
1416 current_ace->attr = (psa->type == SEC_ACE_TYPE_ACCESS_ALLOWED) ? ALLOW_ACE : DENY_ACE;
1417 current_ace->inherited = ((psa->flags & SEC_ACE_FLAG_INHERITED_ACE) ? True : False);
1420 * Now add the created ace to either the file list, the directory
1421 * list, or both. We *MUST* preserve the order here (hence we use
1422 * DLIST_ADD_END) as NT ACLs are order dependent.
1425 if (fsp->is_directory) {
1428 * We can only add to the default POSIX ACE list if the ACE is
1429 * designed to be inherited by both files and directories.
1432 if ((psa->flags & (SEC_ACE_FLAG_OBJECT_INHERIT|SEC_ACE_FLAG_CONTAINER_INHERIT)) ==
1433 (SEC_ACE_FLAG_OBJECT_INHERIT|SEC_ACE_FLAG_CONTAINER_INHERIT)) {
1435 DLIST_ADD_END(dir_ace, current_ace, tmp_ace);
1438 * Note if this was an allow ace. We can't process
1439 * any further deny ace's after this.
1442 if (current_ace->attr == ALLOW_ACE)
1443 got_dir_allow = True;
1445 if ((current_ace->attr == DENY_ACE) && got_dir_allow) {
1446 DEBUG(0,("create_canon_ace_lists: malformed ACL in inheritable ACL ! \
1447 Deny entry after Allow entry. Failing to set on file %s.\n", fsp->fsp_name ));
1448 free_canon_ace_list(file_ace);
1449 free_canon_ace_list(dir_ace);
1453 if( DEBUGLVL( 10 )) {
1454 dbgtext("create_canon_ace_lists: adding dir ACL:\n");
1455 print_canon_ace( current_ace, 0);
1459 * If this is not an inherit only ACE we need to add a duplicate
1463 if (!(psa->flags & SEC_ACE_FLAG_INHERIT_ONLY)) {
1464 canon_ace *dup_ace = dup_canon_ace(current_ace);
1467 DEBUG(0,("create_canon_ace_lists: malloc fail !\n"));
1468 free_canon_ace_list(file_ace);
1469 free_canon_ace_list(dir_ace);
1474 * We must not free current_ace here as its
1475 * pointer is now owned by the dir_ace list.
1477 current_ace = dup_ace;
1480 * We must not free current_ace here as its
1481 * pointer is now owned by the dir_ace list.
1489 * Only add to the file ACL if not inherit only.
1492 if (!(psa->flags & SEC_ACE_FLAG_INHERIT_ONLY)) {
1493 DLIST_ADD_END(file_ace, current_ace, tmp_ace);
1496 * Note if this was an allow ace. We can't process
1497 * any further deny ace's after this.
1500 if (current_ace->attr == ALLOW_ACE)
1501 got_file_allow = True;
1503 if ((current_ace->attr == DENY_ACE) && got_file_allow) {
1504 DEBUG(0,("create_canon_ace_lists: malformed ACL in file ACL ! \
1505 Deny entry after Allow entry. Failing to set on file %s.\n", fsp->fsp_name ));
1506 free_canon_ace_list(file_ace);
1507 free_canon_ace_list(dir_ace);
1511 if( DEBUGLVL( 10 )) {
1512 dbgtext("create_canon_ace_lists: adding file ACL:\n");
1513 print_canon_ace( current_ace, 0);
1515 all_aces_are_inherit_only = False;
1517 * We must not free current_ace here as its
1518 * pointer is now owned by the file_ace list.
1524 * Free if ACE was not added.
1527 SAFE_FREE(current_ace);
1530 if (fsp->is_directory && all_aces_are_inherit_only) {
1532 * Windows 2000 is doing one of these weird 'inherit acl'
1533 * traverses to conserve NTFS ACL resources. Just pretend
1534 * there was no DACL sent. JRA.
1537 DEBUG(10,("create_canon_ace_lists: Win2k inherit acl traverse. Ignoring DACL.\n"));
1538 free_canon_ace_list(file_ace);
1539 free_canon_ace_list(dir_ace);
1544 * Check if we have SMB_ACL_USER_OBJ and SMB_ACL_GROUP_OBJ entries in each
1545 * ACL. If we don't have them, check if any SMB_ACL_USER/SMB_ACL_GROUP
1546 * entries can be converted to *_OBJ. Usually we will already have these
1547 * entries in the Default ACL, and the Access ACL will not have them.
1550 check_owning_objs(file_ace, pfile_owner_sid, pfile_grp_sid);
1553 check_owning_objs(dir_ace, pfile_owner_sid, pfile_grp_sid);
1557 *ppfile_ace = file_ace;
1558 *ppdir_ace = dir_ace;
1563 /****************************************************************************
1564 ASCII art time again... JRA :-).
1566 We have 4 cases to process when moving from an NT ACL to a POSIX ACL. Firstly,
1567 we insist the ACL is in canonical form (ie. all DENY entries preceede ALLOW
1568 entries). Secondly, the merge code has ensured that all duplicate SID entries for
1569 allow or deny have been merged, so the same SID can only appear once in the deny
1570 list or once in the allow list.
1572 We then process as follows :
1574 ---------------------------------------------------------------------------
1575 First pass - look for a Everyone DENY entry.
1577 If it is deny all (rwx) trunate the list at this point.
1578 Else, walk the list from this point and use the deny permissions of this
1579 entry as a mask on all following allow entries. Finally, delete
1580 the Everyone DENY entry (we have applied it to everything possible).
1582 In addition, in this pass we remove any DENY entries that have
1583 no permissions (ie. they are a DENY nothing).
1584 ---------------------------------------------------------------------------
1585 Second pass - only deal with deny user entries.
1587 DENY user1 (perms XXX)
1590 for all following allow group entries where user1 is in group
1591 new_perms |= group_perms;
1593 user1 entry perms = new_perms & ~ XXX;
1595 Convert the deny entry to an allow entry with the new perms and
1596 push to the end of the list. Note if the user was in no groups
1597 this maps to a specific allow nothing entry for this user.
1599 The common case from the NT ACL choser (userX deny all) is
1600 optimised so we don't do the group lookup - we just map to
1601 an allow nothing entry.
1603 What we're doing here is inferring the allow permissions the
1604 person setting the ACE on user1 wanted by looking at the allow
1605 permissions on the groups the user is currently in. This will
1606 be a snapshot, depending on group membership but is the best
1607 we can do and has the advantage of failing closed rather than
1609 ---------------------------------------------------------------------------
1610 Third pass - only deal with deny group entries.
1612 DENY group1 (perms XXX)
1614 for all following allow user entries where user is in group1
1615 user entry perms = user entry perms & ~ XXX;
1617 If there is a group Everyone allow entry with permissions YYY,
1618 convert the group1 entry to an allow entry and modify its
1621 new_perms = YYY & ~ XXX
1623 and push to the end of the list.
1625 If there is no group Everyone allow entry then convert the
1626 group1 entry to a allow nothing entry and push to the end of the list.
1628 Note that the common case from the NT ACL choser (groupX deny all)
1629 cannot be optimised here as we need to modify user entries who are
1630 in the group to change them to a deny all also.
1632 What we're doing here is modifying the allow permissions of
1633 user entries (which are more specific in POSIX ACLs) to mask
1634 out the explicit deny set on the group they are in. This will
1635 be a snapshot depending on current group membership but is the
1636 best we can do and has the advantage of failing closed rather
1638 ---------------------------------------------------------------------------
1639 Fourth pass - cope with cumulative permissions.
1641 for all allow user entries, if there exists an allow group entry with
1642 more permissive permissions, and the user is in that group, rewrite the
1643 allow user permissions to contain both sets of permissions.
1645 Currently the code for this is #ifdef'ed out as these semantics make
1646 no sense to me. JRA.
1647 ---------------------------------------------------------------------------
1649 Note we *MUST* do the deny user pass first as this will convert deny user
1650 entries into allow user entries which can then be processed by the deny
1653 The above algorithm took a *lot* of thinking about - hence this
1654 explaination :-). JRA.
1655 ****************************************************************************/
1657 /****************************************************************************
1658 Process a canon_ace list entries. This is very complex code. We need
1659 to go through and remove the "deny" permissions from any allow entry that matches
1660 the id of this entry. We have already refused any NT ACL that wasn't in correct
1661 order (DENY followed by ALLOW). If any allow entry ends up with zero permissions,
1662 we just remove it (to fail safe). We have already removed any duplicate ace
1663 entries. Treat an "Everyone" DENY_ACE as a special case - use it to mask all
1665 ****************************************************************************/
1667 static void process_deny_list( canon_ace **pp_ace_list )
1669 canon_ace *ace_list = *pp_ace_list;
1670 canon_ace *curr_ace = NULL;
1671 canon_ace *curr_ace_next = NULL;
1673 /* Pass 1 above - look for an Everyone, deny entry. */
1675 for (curr_ace = ace_list; curr_ace; curr_ace = curr_ace_next) {
1676 canon_ace *allow_ace_p;
1678 curr_ace_next = curr_ace->next; /* So we can't lose the link. */
1680 if (curr_ace->attr != DENY_ACE)
1683 if (curr_ace->perms == (mode_t)0) {
1685 /* Deny nothing entry - delete. */
1687 DLIST_REMOVE(ace_list, curr_ace);
1691 if (!sid_equal(&curr_ace->trustee, &global_sid_World))
1694 /* JRATEST - assert. */
1695 SMB_ASSERT(curr_ace->owner_type == WORLD_ACE);
1697 if (curr_ace->perms == ALL_ACE_PERMS) {
1700 * Optimisation. This is a DENY_ALL to Everyone. Truncate the
1701 * list at this point including this entry.
1704 canon_ace *prev_entry = curr_ace->prev;
1706 free_canon_ace_list( curr_ace );
1708 prev_entry->next = NULL;
1710 /* We deleted the entire list. */
1716 for (allow_ace_p = curr_ace->next; allow_ace_p; allow_ace_p = allow_ace_p->next) {
1719 * Only mask off allow entries.
1722 if (allow_ace_p->attr != ALLOW_ACE)
1725 allow_ace_p->perms &= ~curr_ace->perms;
1729 * Now it's been applied, remove it.
1732 DLIST_REMOVE(ace_list, curr_ace);
1735 /* Pass 2 above - deal with deny user entries. */
1737 for (curr_ace = ace_list; curr_ace; curr_ace = curr_ace_next) {
1738 mode_t new_perms = (mode_t)0;
1739 canon_ace *allow_ace_p;
1742 curr_ace_next = curr_ace->next; /* So we can't lose the link. */
1744 if (curr_ace->attr != DENY_ACE)
1747 if (curr_ace->owner_type != UID_ACE)
1750 if (curr_ace->perms == ALL_ACE_PERMS) {
1753 * Optimisation - this is a deny everything to this user.
1754 * Convert to an allow nothing and push to the end of the list.
1757 curr_ace->attr = ALLOW_ACE;
1758 curr_ace->perms = (mode_t)0;
1759 DLIST_DEMOTE(ace_list, curr_ace, tmp_ace);
1763 for (allow_ace_p = curr_ace->next; allow_ace_p; allow_ace_p = allow_ace_p->next) {
1765 if (allow_ace_p->attr != ALLOW_ACE)
1768 /* We process GID_ACE and WORLD_ACE entries only. */
1770 if (allow_ace_p->owner_type == UID_ACE)
1773 if (uid_entry_in_group( curr_ace, allow_ace_p))
1774 new_perms |= allow_ace_p->perms;
1778 * Convert to a allow entry, modify the perms and push to the end
1782 curr_ace->attr = ALLOW_ACE;
1783 curr_ace->perms = (new_perms & ~curr_ace->perms);
1784 DLIST_DEMOTE(ace_list, curr_ace, tmp_ace);
1787 /* Pass 3 above - deal with deny group entries. */
1789 for (curr_ace = ace_list; curr_ace; curr_ace = curr_ace_next) {
1791 canon_ace *allow_ace_p;
1792 canon_ace *allow_everyone_p = NULL;
1794 curr_ace_next = curr_ace->next; /* So we can't lose the link. */
1796 if (curr_ace->attr != DENY_ACE)
1799 if (curr_ace->owner_type != GID_ACE)
1802 for (allow_ace_p = curr_ace->next; allow_ace_p; allow_ace_p = allow_ace_p->next) {
1804 if (allow_ace_p->attr != ALLOW_ACE)
1807 /* Store a pointer to the Everyone allow, if it exists. */
1808 if (allow_ace_p->owner_type == WORLD_ACE)
1809 allow_everyone_p = allow_ace_p;
1811 /* We process UID_ACE entries only. */
1813 if (allow_ace_p->owner_type != UID_ACE)
1816 /* Mask off the deny group perms. */
1818 if (uid_entry_in_group( allow_ace_p, curr_ace))
1819 allow_ace_p->perms &= ~curr_ace->perms;
1823 * Convert the deny to an allow with the correct perms and
1824 * push to the end of the list.
1827 curr_ace->attr = ALLOW_ACE;
1828 if (allow_everyone_p)
1829 curr_ace->perms = allow_everyone_p->perms & ~curr_ace->perms;
1831 curr_ace->perms = (mode_t)0;
1832 DLIST_DEMOTE(ace_list, curr_ace, tmp_ace);
1836 /* Doing this fourth pass allows Windows semantics to be layered
1837 * on top of POSIX semantics. I'm not sure if this is desirable.
1838 * For example, in W2K ACLs there is no way to say, "Group X no
1839 * access, user Y full access" if user Y is a member of group X.
1840 * This seems completely broken semantics to me.... JRA.
1844 /* Pass 4 above - deal with allow entries. */
1846 for (curr_ace = ace_list; curr_ace; curr_ace = curr_ace_next) {
1847 canon_ace *allow_ace_p;
1849 curr_ace_next = curr_ace->next; /* So we can't lose the link. */
1851 if (curr_ace->attr != ALLOW_ACE)
1854 if (curr_ace->owner_type != UID_ACE)
1857 for (allow_ace_p = ace_list; allow_ace_p; allow_ace_p = allow_ace_p->next) {
1859 if (allow_ace_p->attr != ALLOW_ACE)
1862 /* We process GID_ACE entries only. */
1864 if (allow_ace_p->owner_type != GID_ACE)
1867 /* OR in the group perms. */
1869 if (uid_entry_in_group( curr_ace, allow_ace_p))
1870 curr_ace->perms |= allow_ace_p->perms;
1875 *pp_ace_list = ace_list;
1878 /****************************************************************************
1879 Create a default mode that will be used if a security descriptor entry has
1880 no user/group/world entries.
1881 ****************************************************************************/
1883 static mode_t create_default_mode(files_struct *fsp, BOOL interitable_mode)
1885 int snum = SNUM(fsp->conn);
1886 mode_t and_bits = (mode_t)0;
1887 mode_t or_bits = (mode_t)0;
1888 mode_t mode = interitable_mode ? unix_mode( fsp->conn, FILE_ATTRIBUTE_ARCHIVE, fsp->fsp_name, False) : S_IRUSR;
1890 if (fsp->is_directory)
1891 mode |= (S_IWUSR|S_IXUSR);
1894 * Now AND with the create mode/directory mode bits then OR with the
1895 * force create mode/force directory mode bits.
1898 if (fsp->is_directory) {
1899 and_bits = lp_dir_security_mask(snum);
1900 or_bits = lp_force_dir_security_mode(snum);
1902 and_bits = lp_security_mask(snum);
1903 or_bits = lp_force_security_mode(snum);
1906 return ((mode & and_bits)|or_bits);
1909 /****************************************************************************
1910 Unpack a SEC_DESC into two canonical ace lists. We don't depend on this
1912 ****************************************************************************/
1914 static BOOL unpack_canon_ace(files_struct *fsp,
1915 SMB_STRUCT_STAT *pst,
1916 DOM_SID *pfile_owner_sid,
1917 DOM_SID *pfile_grp_sid,
1918 canon_ace **ppfile_ace, canon_ace **ppdir_ace,
1919 uint32 security_info_sent, SEC_DESC *psd)
1921 canon_ace *file_ace = NULL;
1922 canon_ace *dir_ace = NULL;
1927 if(security_info_sent == 0) {
1928 DEBUG(0,("unpack_canon_ace: no security info sent !\n"));
1933 * If no DACL then this is a chown only security descriptor.
1936 if(!(security_info_sent & DACL_SECURITY_INFORMATION) || !psd->dacl)
1940 * Now go through the DACL and create the canon_ace lists.
1943 if (!create_canon_ace_lists( fsp, pst, pfile_owner_sid, pfile_grp_sid,
1944 &file_ace, &dir_ace, psd->dacl))
1947 if ((file_ace == NULL) && (dir_ace == NULL)) {
1948 /* W2K traverse DACL set - ignore. */
1953 * Go through the canon_ace list and merge entries
1954 * belonging to identical users of identical allow or deny type.
1955 * We can do this as all deny entries come first, followed by
1956 * all allow entries (we have mandated this before accepting this acl).
1959 print_canon_ace_list( "file ace - before merge", file_ace);
1960 merge_aces( &file_ace );
1962 print_canon_ace_list( "dir ace - before merge", dir_ace);
1963 merge_aces( &dir_ace );
1966 * NT ACLs are order dependent. Go through the acl lists and
1967 * process DENY entries by masking the allow entries.
1970 print_canon_ace_list( "file ace - before deny", file_ace);
1971 process_deny_list( &file_ace);
1973 print_canon_ace_list( "dir ace - before deny", dir_ace);
1974 process_deny_list( &dir_ace);
1977 * A well formed POSIX file or default ACL has at least 3 entries, a
1978 * SMB_ACL_USER_OBJ, SMB_ACL_GROUP_OBJ, SMB_ACL_OTHER_OBJ
1979 * and optionally a mask entry. Ensure this is the case.
1982 print_canon_ace_list( "file ace - before valid", file_ace);
1985 * A default 3 element mode entry for a file should be r-- --- ---.
1986 * A default 3 element mode entry for a directory should be rwx --- ---.
1989 pst->st_mode = create_default_mode(fsp, False);
1991 if (!ensure_canon_entry_valid(&file_ace, fsp, pfile_owner_sid, pfile_grp_sid, pst, True)) {
1992 free_canon_ace_list(file_ace);
1993 free_canon_ace_list(dir_ace);
1997 print_canon_ace_list( "dir ace - before valid", dir_ace);
2000 * A default inheritable 3 element mode entry for a directory should be the
2001 * mode Samba will use to create a file within. Ensure user rwx bits are set if
2005 pst->st_mode = create_default_mode(fsp, True);
2007 if (dir_ace && !ensure_canon_entry_valid(&dir_ace, fsp, pfile_owner_sid, pfile_grp_sid, pst, True)) {
2008 free_canon_ace_list(file_ace);
2009 free_canon_ace_list(dir_ace);
2013 print_canon_ace_list( "file ace - return", file_ace);
2014 print_canon_ace_list( "dir ace - return", dir_ace);
2016 *ppfile_ace = file_ace;
2017 *ppdir_ace = dir_ace;
2022 /******************************************************************************
2023 When returning permissions, try and fit NT display
2024 semantics if possible. Note the the canon_entries here must have been malloced.
2025 The list format should be - first entry = owner, followed by group and other user
2026 entries, last entry = other.
2028 Note that this doesn't exactly match the NT semantics for an ACL. As POSIX entries
2029 are not ordered, and match on the most specific entry rather than walking a list,
2030 then a simple POSIX permission of rw-r--r-- should really map to 5 entries,
2032 Entry 0: owner : deny all except read and write.
2033 Entry 1: owner : allow read and write.
2034 Entry 2: group : deny all except read.
2035 Entry 3: group : allow read.
2036 Entry 4: Everyone : allow read.
2038 But NT cannot display this in their ACL editor !
2039 ********************************************************************************/
2041 static void arrange_posix_perms( char *filename, canon_ace **pp_list_head)
2043 canon_ace *list_head = *pp_list_head;
2044 canon_ace *owner_ace = NULL;
2045 canon_ace *other_ace = NULL;
2046 canon_ace *ace = NULL;
2048 for (ace = list_head; ace; ace = ace->next) {
2049 if (ace->type == SMB_ACL_USER_OBJ)
2051 else if (ace->type == SMB_ACL_OTHER) {
2052 /* Last ace - this is "other" */
2057 if (!owner_ace || !other_ace) {
2058 DEBUG(0,("arrange_posix_perms: Invalid POSIX permissions for file %s, missing owner or other.\n",
2064 * The POSIX algorithm applies to owner first, and other last,
2065 * so ensure they are arranged in this order.
2069 DLIST_PROMOTE(list_head, owner_ace);
2073 DLIST_DEMOTE(list_head, other_ace, ace);
2076 /* We have probably changed the head of the list. */
2078 *pp_list_head = list_head;
2081 /****************************************************************************
2082 Create a linked list of canonical ACE entries.
2083 ****************************************************************************/
2085 static canon_ace *canonicalise_acl( files_struct *fsp, SMB_ACL_T posix_acl, SMB_STRUCT_STAT *psbuf,
2086 const DOM_SID *powner, const DOM_SID *pgroup, struct pai_val *pal, SMB_ACL_TYPE_T the_acl_type)
2088 connection_struct *conn = fsp->conn;
2089 mode_t acl_mask = (S_IRUSR|S_IWUSR|S_IXUSR);
2090 canon_ace *list_head = NULL;
2091 canon_ace *ace = NULL;
2092 canon_ace *next_ace = NULL;
2093 int entry_id = SMB_ACL_FIRST_ENTRY;
2094 SMB_ACL_ENTRY_T entry;
2097 while ( posix_acl && (SMB_VFS_SYS_ACL_GET_ENTRY(conn, posix_acl, entry_id, &entry) == 1)) {
2098 SMB_ACL_TAG_T tagtype;
2099 SMB_ACL_PERMSET_T permset;
2102 enum ace_owner owner_type;
2105 if (entry_id == SMB_ACL_FIRST_ENTRY)
2106 entry_id = SMB_ACL_NEXT_ENTRY;
2108 /* Is this a MASK entry ? */
2109 if (SMB_VFS_SYS_ACL_GET_TAG_TYPE(conn, entry, &tagtype) == -1)
2112 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, entry, &permset) == -1)
2115 /* Decide which SID to use based on the ACL type. */
2117 case SMB_ACL_USER_OBJ:
2118 /* Get the SID from the owner. */
2119 sid_copy(&sid, powner);
2120 unix_ug.uid = psbuf->st_uid;
2121 owner_type = UID_ACE;
2125 uid_t *puid = (uid_t *)SMB_VFS_SYS_ACL_GET_QUALIFIER(conn, entry);
2127 DEBUG(0,("canonicalise_acl: Failed to get uid.\n"));
2131 * A SMB_ACL_USER entry for the owner is shadowed by the
2132 * SMB_ACL_USER_OBJ entry and Windows also cannot represent
2133 * that entry, so we ignore it. We also don't create such
2134 * entries out of the blue when setting ACLs, so a get/set
2135 * cycle will drop them.
2137 if (the_acl_type == SMB_ACL_TYPE_ACCESS && *puid == psbuf->st_uid) {
2138 SMB_VFS_SYS_ACL_FREE_QUALIFIER(conn, (void *)puid,tagtype);
2141 uid_to_sid( &sid, *puid);
2142 unix_ug.uid = *puid;
2143 owner_type = UID_ACE;
2144 SMB_VFS_SYS_ACL_FREE_QUALIFIER(conn, (void *)puid,tagtype);
2147 case SMB_ACL_GROUP_OBJ:
2148 /* Get the SID from the owning group. */
2149 sid_copy(&sid, pgroup);
2150 unix_ug.gid = psbuf->st_gid;
2151 owner_type = GID_ACE;
2155 gid_t *pgid = (gid_t *)SMB_VFS_SYS_ACL_GET_QUALIFIER(conn, entry);
2157 DEBUG(0,("canonicalise_acl: Failed to get gid.\n"));
2160 gid_to_sid( &sid, *pgid);
2161 unix_ug.gid = *pgid;
2162 owner_type = GID_ACE;
2163 SMB_VFS_SYS_ACL_FREE_QUALIFIER(conn, (void *)pgid,tagtype);
2167 acl_mask = convert_permset_to_mode_t(conn, permset);
2168 continue; /* Don't count the mask as an entry. */
2170 /* Use the Everyone SID */
2171 sid = global_sid_World;
2173 owner_type = WORLD_ACE;
2176 DEBUG(0,("canonicalise_acl: Unknown tagtype %u\n", (unsigned int)tagtype));
2181 * Add this entry to the list.
2184 if ((ace = SMB_MALLOC_P(canon_ace)) == NULL)
2188 ace->type = tagtype;
2189 ace->perms = convert_permset_to_mode_t(conn, permset);
2190 ace->attr = ALLOW_ACE;
2192 ace->unix_ug = unix_ug;
2193 ace->owner_type = owner_type;
2194 ace->inherited = get_inherited_flag(pal, ace, (the_acl_type == SMB_ACL_TYPE_DEFAULT));
2196 DLIST_ADD(list_head, ace);
2200 * This next call will ensure we have at least a user/group/world set.
2203 if (!ensure_canon_entry_valid(&list_head, fsp, powner, pgroup, psbuf, False))
2207 * Now go through the list, masking the permissions with the
2208 * acl_mask. Ensure all DENY Entries are at the start of the list.
2211 DEBUG(10,("canonicalise_acl: %s ace entries before arrange :\n", the_acl_type == SMB_ACL_TYPE_ACCESS ? "Access" : "Default" ));
2213 for ( ace_count = 0, ace = list_head; ace; ace = next_ace, ace_count++) {
2214 next_ace = ace->next;
2216 /* Masks are only applied to entries other than USER_OBJ and OTHER. */
2217 if (ace->type != SMB_ACL_OTHER && ace->type != SMB_ACL_USER_OBJ)
2218 ace->perms &= acl_mask;
2220 if (ace->perms == 0) {
2221 DLIST_PROMOTE(list_head, ace);
2224 if( DEBUGLVL( 10 ) ) {
2225 print_canon_ace(ace, ace_count);
2229 arrange_posix_perms(fsp->fsp_name,&list_head );
2231 print_canon_ace_list( "canonicalise_acl: ace entries after arrange", list_head );
2237 free_canon_ace_list(list_head);
2241 /****************************************************************************
2242 Check if the current user group list contains a given group.
2243 ****************************************************************************/
2245 static BOOL current_user_in_group(gid_t gid)
2249 for (i = 0; i < current_user.ngroups; i++) {
2250 if (current_user.groups[i] == gid) {
2258 /****************************************************************************
2259 Should we override a deny ?
2260 ****************************************************************************/
2262 static BOOL acl_group_override(connection_struct *conn, gid_t prim_gid)
2264 if ((errno == EACCES || errno == EPERM) &&
2265 lp_acl_group_control(SNUM(conn)) &&
2266 current_user_in_group(prim_gid)) {
2273 /****************************************************************************
2274 Attempt to apply an ACL to a file or directory.
2275 ****************************************************************************/
2277 static BOOL set_canon_ace_list(files_struct *fsp, canon_ace *the_ace, BOOL default_ace, gid_t prim_gid, BOOL *pacl_set_support)
2279 connection_struct *conn = fsp->conn;
2281 SMB_ACL_T the_acl = SMB_VFS_SYS_ACL_INIT(conn, (int)count_canon_ace_list(the_ace) + 1);
2284 SMB_ACL_ENTRY_T mask_entry;
2285 BOOL got_mask_entry = False;
2286 SMB_ACL_PERMSET_T mask_permset;
2287 SMB_ACL_TYPE_T the_acl_type = (default_ace ? SMB_ACL_TYPE_DEFAULT : SMB_ACL_TYPE_ACCESS);
2288 BOOL needs_mask = False;
2289 mode_t mask_perms = 0;
2291 #if defined(POSIX_ACL_NEEDS_MASK)
2292 /* HP-UX always wants to have a mask (called "class" there). */
2296 if (the_acl == NULL) {
2298 if (!no_acl_syscall_error(errno)) {
2300 * Only print this error message if we have some kind of ACL
2301 * support that's not working. Otherwise we would always get this.
2303 DEBUG(0,("set_canon_ace_list: Unable to init %s ACL. (%s)\n",
2304 default_ace ? "default" : "file", strerror(errno) ));
2306 *pacl_set_support = False;
2310 if( DEBUGLVL( 10 )) {
2311 dbgtext("set_canon_ace_list: setting ACL:\n");
2312 for (i = 0, p_ace = the_ace; p_ace; p_ace = p_ace->next, i++ ) {
2313 print_canon_ace( p_ace, i);
2317 for (i = 0, p_ace = the_ace; p_ace; p_ace = p_ace->next, i++ ) {
2318 SMB_ACL_ENTRY_T the_entry;
2319 SMB_ACL_PERMSET_T the_permset;
2322 * ACLs only "need" an ACL_MASK entry if there are any named user or
2323 * named group entries. But if there is an ACL_MASK entry, it applies
2324 * to ACL_USER, ACL_GROUP, and ACL_GROUP_OBJ entries. Set the mask
2325 * so that it doesn't deny (i.e., mask off) any permissions.
2328 if (p_ace->type == SMB_ACL_USER || p_ace->type == SMB_ACL_GROUP) {
2330 mask_perms |= p_ace->perms;
2331 } else if (p_ace->type == SMB_ACL_GROUP_OBJ) {
2332 mask_perms |= p_ace->perms;
2336 * Get the entry for this ACE.
2339 if (SMB_VFS_SYS_ACL_CREATE_ENTRY(conn, &the_acl, &the_entry) == -1) {
2340 DEBUG(0,("set_canon_ace_list: Failed to create entry %d. (%s)\n",
2341 i, strerror(errno) ));
2345 if (p_ace->type == SMB_ACL_MASK) {
2346 mask_entry = the_entry;
2347 got_mask_entry = True;
2351 * Ok - we now know the ACL calls should be working, don't
2352 * allow fallback to chmod.
2355 *pacl_set_support = True;
2358 * Initialise the entry from the canon_ace.
2362 * First tell the entry what type of ACE this is.
2365 if (SMB_VFS_SYS_ACL_SET_TAG_TYPE(conn, the_entry, p_ace->type) == -1) {
2366 DEBUG(0,("set_canon_ace_list: Failed to set tag type on entry %d. (%s)\n",
2367 i, strerror(errno) ));
2372 * Only set the qualifier (user or group id) if the entry is a user
2376 if ((p_ace->type == SMB_ACL_USER) || (p_ace->type == SMB_ACL_GROUP)) {
2377 if (SMB_VFS_SYS_ACL_SET_QUALIFIER(conn, the_entry,(void *)&p_ace->unix_ug.uid) == -1) {
2378 DEBUG(0,("set_canon_ace_list: Failed to set qualifier on entry %d. (%s)\n",
2379 i, strerror(errno) ));
2385 * Convert the mode_t perms in the canon_ace to a POSIX permset.
2388 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, the_entry, &the_permset) == -1) {
2389 DEBUG(0,("set_canon_ace_list: Failed to get permset on entry %d. (%s)\n",
2390 i, strerror(errno) ));
2394 if (map_acl_perms_to_permset(conn, p_ace->perms, &the_permset) == -1) {
2395 DEBUG(0,("set_canon_ace_list: Failed to create permset for mode (%u) on entry %d. (%s)\n",
2396 (unsigned int)p_ace->perms, i, strerror(errno) ));
2401 * ..and apply them to the entry.
2404 if (SMB_VFS_SYS_ACL_SET_PERMSET(conn, the_entry, the_permset) == -1) {
2405 DEBUG(0,("set_canon_ace_list: Failed to add permset on entry %d. (%s)\n",
2406 i, strerror(errno) ));
2411 print_canon_ace( p_ace, i);
2415 if (needs_mask && !got_mask_entry) {
2416 if (SMB_VFS_SYS_ACL_CREATE_ENTRY(conn, &the_acl, &mask_entry) == -1) {
2417 DEBUG(0,("set_canon_ace_list: Failed to create mask entry. (%s)\n", strerror(errno) ));
2421 if (SMB_VFS_SYS_ACL_SET_TAG_TYPE(conn, mask_entry, SMB_ACL_MASK) == -1) {
2422 DEBUG(0,("set_canon_ace_list: Failed to set tag type on mask entry. (%s)\n",strerror(errno) ));
2426 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, mask_entry, &mask_permset) == -1) {
2427 DEBUG(0,("set_canon_ace_list: Failed to get mask permset. (%s)\n", strerror(errno) ));
2431 if (map_acl_perms_to_permset(conn, S_IRUSR|S_IWUSR|S_IXUSR, &mask_permset) == -1) {
2432 DEBUG(0,("set_canon_ace_list: Failed to create mask permset. (%s)\n", strerror(errno) ));
2436 if (SMB_VFS_SYS_ACL_SET_PERMSET(conn, mask_entry, mask_permset) == -1) {
2437 DEBUG(0,("set_canon_ace_list: Failed to add mask permset. (%s)\n", strerror(errno) ));
2443 * Check if the ACL is valid.
2446 if (SMB_VFS_SYS_ACL_VALID(conn, the_acl) == -1) {
2447 DEBUG(0,("set_canon_ace_list: ACL type (%s) is invalid for set (%s).\n",
2448 the_acl_type == SMB_ACL_TYPE_DEFAULT ? "directory default" : "file",
2454 * Finally apply it to the file or directory.
2457 if(default_ace || fsp->is_directory || fsp->fh->fd == -1) {
2458 if (SMB_VFS_SYS_ACL_SET_FILE(conn, fsp->fsp_name, the_acl_type, the_acl) == -1) {
2460 * Some systems allow all the above calls and only fail with no ACL support
2461 * when attempting to apply the acl. HPUX with HFS is an example of this. JRA.
2463 if (no_acl_syscall_error(errno)) {
2464 *pacl_set_support = False;
2467 if (acl_group_override(conn, prim_gid)) {
2470 DEBUG(5,("set_canon_ace_list: acl group control on and current user in file %s primary group.\n",
2474 sret = SMB_VFS_SYS_ACL_SET_FILE(conn, fsp->fsp_name, the_acl_type, the_acl);
2482 DEBUG(2,("set_canon_ace_list: sys_acl_set_file type %s failed for file %s (%s).\n",
2483 the_acl_type == SMB_ACL_TYPE_DEFAULT ? "directory default" : "file",
2484 fsp->fsp_name, strerror(errno) ));
2489 if (SMB_VFS_SYS_ACL_SET_FD(fsp, fsp->fh->fd, the_acl) == -1) {
2491 * Some systems allow all the above calls and only fail with no ACL support
2492 * when attempting to apply the acl. HPUX with HFS is an example of this. JRA.
2494 if (no_acl_syscall_error(errno)) {
2495 *pacl_set_support = False;
2498 if (acl_group_override(conn, prim_gid)) {
2501 DEBUG(5,("set_canon_ace_list: acl group control on and current user in file %s primary group.\n",
2505 sret = SMB_VFS_SYS_ACL_SET_FD(fsp, fsp->fh->fd, the_acl);
2513 DEBUG(2,("set_canon_ace_list: sys_acl_set_file failed for file %s (%s).\n",
2514 fsp->fsp_name, strerror(errno) ));
2524 if (the_acl != NULL) {
2525 SMB_VFS_SYS_ACL_FREE_ACL(conn, the_acl);
2531 /****************************************************************************
2532 Find a particular canon_ace entry.
2533 ****************************************************************************/
2535 static struct canon_ace *canon_ace_entry_for(struct canon_ace *list, SMB_ACL_TAG_T type, posix_id *id)
2538 if (list->type == type && ((type != SMB_ACL_USER && type != SMB_ACL_GROUP) ||
2539 (type == SMB_ACL_USER && id && id->uid == list->unix_ug.uid) ||
2540 (type == SMB_ACL_GROUP && id && id->gid == list->unix_ug.gid)))
2547 /****************************************************************************
2549 ****************************************************************************/
2551 SMB_ACL_T free_empty_sys_acl(connection_struct *conn, SMB_ACL_T the_acl)
2553 SMB_ACL_ENTRY_T entry;
2557 if (SMB_VFS_SYS_ACL_GET_ENTRY(conn, the_acl, SMB_ACL_FIRST_ENTRY, &entry) != 1) {
2558 SMB_VFS_SYS_ACL_FREE_ACL(conn, the_acl);
2564 /****************************************************************************
2565 Convert a canon_ace to a generic 3 element permission - if possible.
2566 ****************************************************************************/
2568 #define MAP_PERM(p,mask,result) (((p) & (mask)) ? (result) : 0 )
2570 static BOOL convert_canon_ace_to_posix_perms( files_struct *fsp, canon_ace *file_ace_list, mode_t *posix_perms)
2572 int snum = SNUM(fsp->conn);
2573 size_t ace_count = count_canon_ace_list(file_ace_list);
2575 canon_ace *owner_ace = NULL;
2576 canon_ace *group_ace = NULL;
2577 canon_ace *other_ace = NULL;
2581 if (ace_count != 3) {
2582 DEBUG(3,("convert_canon_ace_to_posix_perms: Too many ACE entries for file %s to convert to \
2583 posix perms.\n", fsp->fsp_name ));
2587 for (ace_p = file_ace_list; ace_p; ace_p = ace_p->next) {
2588 if (ace_p->owner_type == UID_ACE)
2590 else if (ace_p->owner_type == GID_ACE)
2592 else if (ace_p->owner_type == WORLD_ACE)
2596 if (!owner_ace || !group_ace || !other_ace) {
2597 DEBUG(3,("convert_canon_ace_to_posix_perms: Can't get standard entries for file %s.\n",
2602 *posix_perms = (mode_t)0;
2604 *posix_perms |= owner_ace->perms;
2605 *posix_perms |= MAP_PERM(group_ace->perms, S_IRUSR, S_IRGRP);
2606 *posix_perms |= MAP_PERM(group_ace->perms, S_IWUSR, S_IWGRP);
2607 *posix_perms |= MAP_PERM(group_ace->perms, S_IXUSR, S_IXGRP);
2608 *posix_perms |= MAP_PERM(other_ace->perms, S_IRUSR, S_IROTH);
2609 *posix_perms |= MAP_PERM(other_ace->perms, S_IWUSR, S_IWOTH);
2610 *posix_perms |= MAP_PERM(other_ace->perms, S_IXUSR, S_IXOTH);
2612 /* The owner must have at least read access. */
2614 *posix_perms |= S_IRUSR;
2615 if (fsp->is_directory)
2616 *posix_perms |= (S_IWUSR|S_IXUSR);
2618 /* If requested apply the masks. */
2620 /* Get the initial bits to apply. */
2622 if (fsp->is_directory) {
2623 and_bits = lp_dir_security_mask(snum);
2624 or_bits = lp_force_dir_security_mode(snum);
2626 and_bits = lp_security_mask(snum);
2627 or_bits = lp_force_security_mode(snum);
2630 *posix_perms = (((*posix_perms) & and_bits)|or_bits);
2632 DEBUG(10,("convert_canon_ace_to_posix_perms: converted u=%o,g=%o,w=%o to perm=0%o for file %s.\n",
2633 (int)owner_ace->perms, (int)group_ace->perms, (int)other_ace->perms, (int)*posix_perms,
2639 /****************************************************************************
2640 Incoming NT ACLs on a directory can be split into a default POSIX acl (CI|OI|IO) and
2641 a normal POSIX acl. Win2k needs these split acls re-merging into one ACL
2642 with CI|OI set so it is inherited and also applies to the directory.
2643 Based on code from "Jim McDonough" <jmcd@us.ibm.com>.
2644 ****************************************************************************/
2646 static size_t merge_default_aces( SEC_ACE *nt_ace_list, size_t num_aces)
2650 for (i = 0; i < num_aces; i++) {
2651 for (j = i+1; j < num_aces; j++) {
2652 uint32 i_flags_ni = (nt_ace_list[i].flags & ~SEC_ACE_FLAG_INHERITED_ACE);
2653 uint32 j_flags_ni = (nt_ace_list[j].flags & ~SEC_ACE_FLAG_INHERITED_ACE);
2654 BOOL i_inh = (nt_ace_list[i].flags & SEC_ACE_FLAG_INHERITED_ACE) ? True : False;
2655 BOOL j_inh = (nt_ace_list[j].flags & SEC_ACE_FLAG_INHERITED_ACE) ? True : False;
2657 /* We know the lower number ACE's are file entries. */
2658 if ((nt_ace_list[i].type == nt_ace_list[j].type) &&
2659 (nt_ace_list[i].size == nt_ace_list[j].size) &&
2660 (nt_ace_list[i].info.mask == nt_ace_list[j].info.mask) &&
2661 sid_equal(&nt_ace_list[i].trustee, &nt_ace_list[j].trustee) &&
2663 (i_flags_ni == 0) &&
2664 (j_flags_ni == (SEC_ACE_FLAG_OBJECT_INHERIT|
2665 SEC_ACE_FLAG_CONTAINER_INHERIT|
2666 SEC_ACE_FLAG_INHERIT_ONLY))) {
2668 * W2K wants to have access allowed zero access ACE's
2669 * at the end of the list. If the mask is zero, merge
2670 * the non-inherited ACE onto the inherited ACE.
2673 if (nt_ace_list[i].info.mask == 0) {
2674 nt_ace_list[j].flags = SEC_ACE_FLAG_OBJECT_INHERIT|SEC_ACE_FLAG_CONTAINER_INHERIT|
2675 (i_inh ? SEC_ACE_FLAG_INHERITED_ACE : 0);
2676 if (num_aces - i - 1 > 0)
2677 memmove(&nt_ace_list[i], &nt_ace_list[i+1], (num_aces-i-1) *
2680 DEBUG(10,("merge_default_aces: Merging zero access ACE %u onto ACE %u.\n",
2681 (unsigned int)i, (unsigned int)j ));
2684 * These are identical except for the flags.
2685 * Merge the inherited ACE onto the non-inherited ACE.
2688 nt_ace_list[i].flags = SEC_ACE_FLAG_OBJECT_INHERIT|SEC_ACE_FLAG_CONTAINER_INHERIT|
2689 (i_inh ? SEC_ACE_FLAG_INHERITED_ACE : 0);
2690 if (num_aces - j - 1 > 0)
2691 memmove(&nt_ace_list[j], &nt_ace_list[j+1], (num_aces-j-1) *
2694 DEBUG(10,("merge_default_aces: Merging ACE %u onto ACE %u.\n",
2695 (unsigned int)j, (unsigned int)i ));
2705 /****************************************************************************
2706 Reply to query a security descriptor from an fsp. If it succeeds it allocates
2707 the space for the return elements and returns the size needed to return the
2708 security descriptor. This should be the only external function needed for
2709 the UNIX style get ACL.
2710 ****************************************************************************/
2712 size_t get_nt_acl(files_struct *fsp, uint32 security_info, SEC_DESC **ppdesc)
2714 connection_struct *conn = fsp->conn;
2715 SMB_STRUCT_STAT sbuf;
2716 SEC_ACE *nt_ace_list = NULL;
2720 SEC_ACL *psa = NULL;
2721 size_t num_acls = 0;
2722 size_t num_def_acls = 0;
2723 size_t num_aces = 0;
2724 SMB_ACL_T posix_acl = NULL;
2725 SMB_ACL_T def_acl = NULL;
2726 canon_ace *file_ace = NULL;
2727 canon_ace *dir_ace = NULL;
2728 size_t num_profile_acls = 0;
2729 struct pai_val *pal = NULL;
2730 SEC_DESC *psd = NULL;
2734 DEBUG(10,("get_nt_acl: called for file %s\n", fsp->fsp_name ));
2736 if(fsp->is_directory || fsp->fh->fd == -1) {
2738 /* Get the stat struct for the owner info. */
2739 if(SMB_VFS_STAT(fsp->conn,fsp->fsp_name, &sbuf) != 0) {
2743 * Get the ACL from the path.
2746 posix_acl = SMB_VFS_SYS_ACL_GET_FILE(conn, fsp->fsp_name, SMB_ACL_TYPE_ACCESS);
2749 * If it's a directory get the default POSIX ACL.
2752 if(fsp->is_directory) {
2753 def_acl = SMB_VFS_SYS_ACL_GET_FILE(conn, fsp->fsp_name, SMB_ACL_TYPE_DEFAULT);
2754 def_acl = free_empty_sys_acl(conn, def_acl);
2759 /* Get the stat struct for the owner info. */
2760 if(SMB_VFS_FSTAT(fsp,fsp->fh->fd,&sbuf) != 0) {
2764 * Get the ACL from the fd.
2766 posix_acl = SMB_VFS_SYS_ACL_GET_FD(fsp, fsp->fh->fd);
2769 DEBUG(5,("get_nt_acl : file ACL %s, directory ACL %s\n",
2770 posix_acl ? "present" : "absent",
2771 def_acl ? "present" : "absent" ));
2773 pal = load_inherited_info(fsp);
2776 * Get the owner, group and world SIDs.
2779 if (lp_profile_acls(SNUM(conn))) {
2780 /* For WXP SP1 the owner must be administrators. */
2781 sid_copy(&owner_sid, &global_sid_Builtin_Administrators);
2782 sid_copy(&group_sid, &global_sid_Builtin_Users);
2783 num_profile_acls = 2;
2785 create_file_sids(&sbuf, &owner_sid, &group_sid);
2788 if ((security_info & DACL_SECURITY_INFORMATION) && !(security_info & PROTECTED_DACL_SECURITY_INFORMATION)) {
2791 * In the optimum case Creator Owner and Creator Group would be used for
2792 * the ACL_USER_OBJ and ACL_GROUP_OBJ entries, respectively, but this
2793 * would lead to usability problems under Windows: The Creator entries
2794 * are only available in browse lists of directories and not for files;
2795 * additionally the identity of the owning group couldn't be determined.
2796 * We therefore use those identities only for Default ACLs.
2799 /* Create the canon_ace lists. */
2800 file_ace = canonicalise_acl( fsp, posix_acl, &sbuf, &owner_sid, &group_sid, pal, SMB_ACL_TYPE_ACCESS );
2802 /* We must have *some* ACLS. */
2804 if (count_canon_ace_list(file_ace) == 0) {
2805 DEBUG(0,("get_nt_acl : No ACLs on file (%s) !\n", fsp->fsp_name ));
2809 if (fsp->is_directory && def_acl) {
2810 dir_ace = canonicalise_acl(fsp, def_acl, &sbuf,
2811 &global_sid_Creator_Owner,
2812 &global_sid_Creator_Group, pal, SMB_ACL_TYPE_DEFAULT );
2816 * Create the NT ACE list from the canonical ace lists.
2824 if (nt4_compatible_acls() && dir_ace) {
2826 * NT 4 chokes if an ACL contains an INHERIT_ONLY entry
2827 * but no non-INHERIT_ONLY entry for one SID. So we only
2828 * remove entries from the Access ACL if the
2829 * corresponding Default ACL entries have also been
2830 * removed. ACEs for CREATOR-OWNER and CREATOR-GROUP
2831 * are exceptions. We can do nothing
2832 * intelligent if the Default ACL contains entries that
2833 * are not also contained in the Access ACL, so this
2834 * case will still fail under NT 4.
2837 ace = canon_ace_entry_for(dir_ace, SMB_ACL_OTHER, NULL);
2838 if (ace && !ace->perms) {
2839 DLIST_REMOVE(dir_ace, ace);
2842 ace = canon_ace_entry_for(file_ace, SMB_ACL_OTHER, NULL);
2843 if (ace && !ace->perms) {
2844 DLIST_REMOVE(file_ace, ace);
2850 * WinNT doesn't usually have Creator Group
2851 * in browse lists, so we send this entry to
2852 * WinNT even if it contains no relevant
2853 * permissions. Once we can add
2854 * Creator Group to browse lists we can
2859 ace = canon_ace_entry_for(dir_ace, SMB_ACL_GROUP_OBJ, NULL);
2860 if (ace && !ace->perms) {
2861 DLIST_REMOVE(dir_ace, ace);
2866 ace = canon_ace_entry_for(file_ace, SMB_ACL_GROUP_OBJ, NULL);
2867 if (ace && !ace->perms) {
2868 DLIST_REMOVE(file_ace, ace);
2873 num_acls = count_canon_ace_list(file_ace);
2874 num_def_acls = count_canon_ace_list(dir_ace);
2876 /* Allocate the ace list. */
2877 if ((nt_ace_list = SMB_MALLOC_ARRAY(SEC_ACE,num_acls + num_profile_acls + num_def_acls)) == NULL) {
2878 DEBUG(0,("get_nt_acl: Unable to malloc space for nt_ace_list.\n"));
2882 memset(nt_ace_list, '\0', (num_acls + num_def_acls) * sizeof(SEC_ACE) );
2885 * Create the NT ACE list from the canonical ace lists.
2890 for (i = 0; i < num_acls; i++, ace = ace->next) {
2893 acc = map_canon_ace_perms(SNUM(conn), &nt_acl_type, &owner_sid, ace, fsp->is_directory);
2894 init_sec_ace(&nt_ace_list[num_aces++], &ace->trustee, nt_acl_type, acc, ace->inherited ? SEC_ACE_FLAG_INHERITED_ACE : 0);
2897 /* The User must have access to a profile share - even if we can't map the SID. */
2898 if (lp_profile_acls(SNUM(conn))) {
2901 init_sec_access(&acc,FILE_GENERIC_ALL);
2902 init_sec_ace(&nt_ace_list[num_aces++], &global_sid_Builtin_Users, SEC_ACE_TYPE_ACCESS_ALLOWED,
2908 for (i = 0; i < num_def_acls; i++, ace = ace->next) {
2911 acc = map_canon_ace_perms(SNUM(conn), &nt_acl_type, &owner_sid, ace, fsp->is_directory);
2912 init_sec_ace(&nt_ace_list[num_aces++], &ace->trustee, nt_acl_type, acc,
2913 SEC_ACE_FLAG_OBJECT_INHERIT|SEC_ACE_FLAG_CONTAINER_INHERIT|
2914 SEC_ACE_FLAG_INHERIT_ONLY|
2915 (ace->inherited ? SEC_ACE_FLAG_INHERITED_ACE : 0));
2918 /* The User must have access to a profile share - even if we can't map the SID. */
2919 if (lp_profile_acls(SNUM(conn))) {
2922 init_sec_access(&acc,FILE_GENERIC_ALL);
2923 init_sec_ace(&nt_ace_list[num_aces++], &global_sid_Builtin_Users, SEC_ACE_TYPE_ACCESS_ALLOWED, acc,
2924 SEC_ACE_FLAG_OBJECT_INHERIT|SEC_ACE_FLAG_CONTAINER_INHERIT|
2925 SEC_ACE_FLAG_INHERIT_ONLY|0);
2929 * Merge POSIX default ACLs and normal ACLs into one NT ACE.
2930 * Win2K needs this to get the inheritance correct when replacing ACLs
2931 * on a directory tree. Based on work by Jim @ IBM.
2934 num_aces = merge_default_aces(nt_ace_list, num_aces);
2939 if((psa = make_sec_acl( main_loop_talloc_get(), NT4_ACL_REVISION, num_aces, nt_ace_list)) == NULL) {
2940 DEBUG(0,("get_nt_acl: Unable to malloc space for acl.\n"));
2944 } /* security_info & DACL_SECURITY_INFORMATION */
2946 psd = make_standard_sec_desc( main_loop_talloc_get(),
2947 (security_info & OWNER_SECURITY_INFORMATION) ? &owner_sid : NULL,
2948 (security_info & GROUP_SECURITY_INFORMATION) ? &group_sid : NULL,
2953 DEBUG(0,("get_nt_acl: Unable to malloc space for security descriptor.\n"));
2959 * Windows 2000: The DACL_PROTECTED flag in the security
2960 * descriptor marks the ACL as non-inheriting, i.e., no
2961 * ACEs from higher level directories propagate to this
2962 * ACL. In the POSIX ACL model permissions are only
2963 * inherited at file create time, so ACLs never contain
2964 * any ACEs that are inherited dynamically. The DACL_PROTECTED
2965 * flag doesn't seem to bother Windows NT.
2966 * Always set this if map acl inherit is turned off.
2968 if (get_protected_flag(pal) || !lp_map_acl_inherit(SNUM(conn))) {
2969 psd->type |= SE_DESC_DACL_PROTECTED;
2973 dacl_sort_into_canonical_order(psd->dacl->ace, (unsigned int)psd->dacl->num_aces);
2981 SMB_VFS_SYS_ACL_FREE_ACL(conn, posix_acl);
2984 SMB_VFS_SYS_ACL_FREE_ACL(conn, def_acl);
2986 free_canon_ace_list(file_ace);
2987 free_canon_ace_list(dir_ace);
2988 free_inherited_info(pal);
2989 SAFE_FREE(nt_ace_list);
2994 /****************************************************************************
2995 Try to chown a file. We will be able to chown it under the following conditions.
2997 1) If we have root privileges, then it will just work.
2998 2) If we have SeTakeOwnershipPrivilege we can change the user to the current user.
2999 3) If we have SeRestorePrivilege we can change the user to any other user.
3000 4) If we have write permission to the file and dos_filemodes is set
3001 then allow chown to the currently authenticated user.
3002 ****************************************************************************/
3004 static int try_chown(connection_struct *conn, const char *fname, uid_t uid, gid_t gid)
3010 if(!CAN_WRITE(conn)) {
3015 /* try the direct way first */
3016 ret = SMB_VFS_CHOWN(conn, fname, uid, gid);
3020 /* Case (2) / (3) */
3021 if (lp_enable_privileges()) {
3023 BOOL has_take_ownership_priv = user_has_privileges(current_user.nt_user_token,
3024 &se_take_ownership);
3025 BOOL has_restore_priv = user_has_privileges(current_user.nt_user_token,
3029 if ( ( has_take_ownership_priv && ( uid == current_user.uid ) ) ||
3031 ( has_restore_priv ) ) {
3034 /* Keep the current file gid the same - take ownership doesn't imply group change. */
3035 ret = SMB_VFS_CHOWN(conn, fname, uid, (gid_t)-1);
3042 if (!lp_dos_filemode(SNUM(conn))) {
3046 if (SMB_VFS_STAT(conn,fname,&st)) {
3050 fsp = open_file_fchmod(conn,fname,&st);
3055 /* only allow chown to the current user. This is more secure,
3056 and also copes with the case where the SID in a take ownership ACL is
3057 a local SID on the users workstation
3059 uid = current_user.uid;
3062 /* Keep the current file gid the same. */
3063 ret = SMB_VFS_FCHOWN(fsp, fsp->fh->fd, uid, (gid_t)-1);
3066 close_file_fchmod(fsp);
3071 /****************************************************************************
3072 Reply to set a security descriptor on an fsp. security_info_sent is the
3073 description of the following NT ACL.
3074 This should be the only external function needed for the UNIX style set ACL.
3075 ****************************************************************************/
3077 BOOL set_nt_acl(files_struct *fsp, uint32 security_info_sent, SEC_DESC *psd)
3079 connection_struct *conn = fsp->conn;
3080 uid_t user = (uid_t)-1;
3081 gid_t grp = (gid_t)-1;
3082 SMB_STRUCT_STAT sbuf;
3083 DOM_SID file_owner_sid;
3084 DOM_SID file_grp_sid;
3085 canon_ace *file_ace_list = NULL;
3086 canon_ace *dir_ace_list = NULL;
3087 BOOL acl_perms = False;
3088 mode_t orig_mode = (mode_t)0;
3091 BOOL need_chown = False;
3093 DEBUG(10,("set_nt_acl: called for file %s\n", fsp->fsp_name ));
3095 if (!CAN_WRITE(conn)) {
3096 DEBUG(10,("set acl rejected on read-only share\n"));
3101 * Get the current state of the file.
3104 if(fsp->is_directory || fsp->fh->fd == -1) {
3105 if(SMB_VFS_STAT(fsp->conn,fsp->fsp_name, &sbuf) != 0)
3108 if(SMB_VFS_FSTAT(fsp,fsp->fh->fd,&sbuf) != 0)
3112 /* Save the original elements we check against. */
3113 orig_mode = sbuf.st_mode;
3114 orig_uid = sbuf.st_uid;
3115 orig_gid = sbuf.st_gid;
3118 * Unpack the user/group/world id's.
3121 if (!unpack_nt_owners( SNUM(conn), &sbuf, &user, &grp, security_info_sent, psd)) {
3126 * Do we need to chown ?
3129 if (((user != (uid_t)-1) && (orig_uid != user)) || (( grp != (gid_t)-1) && (orig_gid != grp))) {
3134 * Chown before setting ACL only if we don't change the user, or
3135 * if we change to the current user, but not if we want to give away
3139 if (need_chown && (user == (uid_t)-1 || user == current_user.uid)) {
3141 DEBUG(3,("set_nt_acl: chown %s. uid = %u, gid = %u.\n",
3142 fsp->fsp_name, (unsigned int)user, (unsigned int)grp ));
3144 if(try_chown( fsp->conn, fsp->fsp_name, user, grp) == -1) {
3145 DEBUG(3,("set_nt_acl: chown %s, %u, %u failed. Error = %s.\n",
3146 fsp->fsp_name, (unsigned int)user, (unsigned int)grp, strerror(errno) ));
3151 * Recheck the current state of the file, which may have changed.
3152 * (suid/sgid bits, for instance)
3155 if(fsp->is_directory) {
3156 if(SMB_VFS_STAT(fsp->conn, fsp->fsp_name, &sbuf) != 0) {
3163 if(fsp->fh->fd == -1)
3164 ret = SMB_VFS_STAT(fsp->conn, fsp->fsp_name, &sbuf);
3166 ret = SMB_VFS_FSTAT(fsp,fsp->fh->fd,&sbuf);
3172 /* Save the original elements we check against. */
3173 orig_mode = sbuf.st_mode;
3174 orig_uid = sbuf.st_uid;
3175 orig_gid = sbuf.st_gid;
3177 /* We did it, don't try again */
3181 create_file_sids(&sbuf, &file_owner_sid, &file_grp_sid);
3183 acl_perms = unpack_canon_ace( fsp, &sbuf, &file_owner_sid, &file_grp_sid,
3184 &file_ace_list, &dir_ace_list, security_info_sent, psd);
3186 /* Ignore W2K traverse DACL set. */
3187 if (file_ace_list || dir_ace_list) {
3190 DEBUG(3,("set_nt_acl: cannot set permissions\n"));
3191 free_canon_ace_list(file_ace_list);
3192 free_canon_ace_list(dir_ace_list);
3197 * Only change security if we got a DACL.
3200 if((security_info_sent & DACL_SECURITY_INFORMATION) && (psd->dacl != NULL)) {
3202 BOOL acl_set_support = False;
3206 * Try using the POSIX ACL set first. Fall back to chmod if
3207 * we have no ACL support on this filesystem.
3210 if (acl_perms && file_ace_list) {
3211 ret = set_canon_ace_list(fsp, file_ace_list, False, sbuf.st_gid, &acl_set_support);
3212 if (acl_set_support && ret == False) {
3213 DEBUG(3,("set_nt_acl: failed to set file acl on file %s (%s).\n", fsp->fsp_name, strerror(errno) ));
3214 free_canon_ace_list(file_ace_list);
3215 free_canon_ace_list(dir_ace_list);
3220 if (acl_perms && acl_set_support && fsp->is_directory) {
3222 if (!set_canon_ace_list(fsp, dir_ace_list, True, sbuf.st_gid, &acl_set_support)) {
3223 DEBUG(3,("set_nt_acl: failed to set default acl on directory %s (%s).\n", fsp->fsp_name, strerror(errno) ));
3224 free_canon_ace_list(file_ace_list);
3225 free_canon_ace_list(dir_ace_list);
3231 * No default ACL - delete one if it exists.
3234 if (SMB_VFS_SYS_ACL_DELETE_DEF_FILE(conn, fsp->fsp_name) == -1) {
3237 if (acl_group_override(conn, sbuf.st_gid)) {
3238 DEBUG(5,("set_nt_acl: acl group control on and "
3239 "current user in file %s primary group. Override delete_def_acl\n",
3243 sret = SMB_VFS_SYS_ACL_DELETE_DEF_FILE(conn, fsp->fsp_name);
3248 DEBUG(3,("set_nt_acl: sys_acl_delete_def_file failed (%s)\n", strerror(errno)));
3249 free_canon_ace_list(file_ace_list);
3250 free_canon_ace_list(dir_ace_list);
3257 if (acl_set_support) {
3258 store_inheritance_attributes(fsp, file_ace_list, dir_ace_list,
3259 (psd->type & SE_DESC_DACL_PROTECTED) ? True : False);
3263 * If we cannot set using POSIX ACLs we fall back to checking if we need to chmod.
3266 if(!acl_set_support && acl_perms) {
3269 if (!convert_canon_ace_to_posix_perms( fsp, file_ace_list, &posix_perms)) {
3270 free_canon_ace_list(file_ace_list);
3271 free_canon_ace_list(dir_ace_list);
3272 DEBUG(3,("set_nt_acl: failed to convert file acl to posix permissions for file %s.\n",
3277 if (orig_mode != posix_perms) {
3279 DEBUG(3,("set_nt_acl: chmod %s. perms = 0%o.\n",
3280 fsp->fsp_name, (unsigned int)posix_perms ));
3282 if(SMB_VFS_CHMOD(conn,fsp->fsp_name, posix_perms) == -1) {
3284 if (acl_group_override(conn, sbuf.st_gid)) {
3285 DEBUG(5,("set_nt_acl: acl group control on and "
3286 "current user in file %s primary group. Override chmod\n",
3290 sret = SMB_VFS_CHMOD(conn,fsp->fsp_name, posix_perms);
3295 DEBUG(3,("set_nt_acl: chmod %s, 0%o failed. Error = %s.\n",
3296 fsp->fsp_name, (unsigned int)posix_perms, strerror(errno) ));
3297 free_canon_ace_list(file_ace_list);
3298 free_canon_ace_list(dir_ace_list);
3306 free_canon_ace_list(file_ace_list);
3307 free_canon_ace_list(dir_ace_list);
3310 /* Any chown pending? */
3313 DEBUG(3,("set_nt_acl: chown %s. uid = %u, gid = %u.\n",
3314 fsp->fsp_name, (unsigned int)user, (unsigned int)grp ));
3316 if(try_chown( fsp->conn, fsp->fsp_name, user, grp) == -1) {
3317 DEBUG(3,("set_nt_acl: chown %s, %u, %u failed. Error = %s.\n",
3318 fsp->fsp_name, (unsigned int)user, (unsigned int)grp, strerror(errno) ));
3326 /****************************************************************************
3327 Get the actual group bits stored on a file with an ACL. Has no effect if
3328 the file has no ACL. Needed in dosmode code where the stat() will return
3329 the mask bits, not the real group bits, for a file with an ACL.
3330 ****************************************************************************/
3332 int get_acl_group_bits( connection_struct *conn, const char *fname, mode_t *mode )
3334 int entry_id = SMB_ACL_FIRST_ENTRY;
3335 SMB_ACL_ENTRY_T entry;
3336 SMB_ACL_T posix_acl;
3339 posix_acl = SMB_VFS_SYS_ACL_GET_FILE(conn, fname, SMB_ACL_TYPE_ACCESS);
3340 if (posix_acl == (SMB_ACL_T)NULL)
3343 while (SMB_VFS_SYS_ACL_GET_ENTRY(conn, posix_acl, entry_id, &entry) == 1) {
3344 SMB_ACL_TAG_T tagtype;
3345 SMB_ACL_PERMSET_T permset;
3348 if (entry_id == SMB_ACL_FIRST_ENTRY)
3349 entry_id = SMB_ACL_NEXT_ENTRY;
3351 if (SMB_VFS_SYS_ACL_GET_TAG_TYPE(conn, entry, &tagtype) ==-1)
3354 if (tagtype == SMB_ACL_GROUP_OBJ) {
3355 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, entry, &permset) == -1) {
3358 *mode &= ~(S_IRGRP|S_IWGRP|S_IXGRP);
3359 *mode |= (SMB_VFS_SYS_ACL_GET_PERM(conn, permset, SMB_ACL_READ) ? S_IRGRP : 0);
3360 *mode |= (SMB_VFS_SYS_ACL_GET_PERM(conn, permset, SMB_ACL_WRITE) ? S_IWGRP : 0);
3361 *mode |= (SMB_VFS_SYS_ACL_GET_PERM(conn, permset, SMB_ACL_EXECUTE) ? S_IXGRP : 0);
3367 SMB_VFS_SYS_ACL_FREE_ACL(conn, posix_acl);
3371 /****************************************************************************
3372 Do a chmod by setting the ACL USER_OBJ, GROUP_OBJ and OTHER bits in an ACL
3373 and set the mask to rwx. Needed to preserve complex ACLs set by NT.
3374 ****************************************************************************/
3376 static int chmod_acl_internals( connection_struct *conn, SMB_ACL_T posix_acl, mode_t mode)
3378 int entry_id = SMB_ACL_FIRST_ENTRY;
3379 SMB_ACL_ENTRY_T entry;
3380 int num_entries = 0;
3382 while ( SMB_VFS_SYS_ACL_GET_ENTRY(conn, posix_acl, entry_id, &entry) == 1) {
3383 SMB_ACL_TAG_T tagtype;
3384 SMB_ACL_PERMSET_T permset;
3388 if (entry_id == SMB_ACL_FIRST_ENTRY)
3389 entry_id = SMB_ACL_NEXT_ENTRY;
3391 if (SMB_VFS_SYS_ACL_GET_TAG_TYPE(conn, entry, &tagtype) == -1)
3394 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, entry, &permset) == -1)
3400 case SMB_ACL_USER_OBJ:
3401 perms = unix_perms_to_acl_perms(mode, S_IRUSR, S_IWUSR, S_IXUSR);
3403 case SMB_ACL_GROUP_OBJ:
3404 perms = unix_perms_to_acl_perms(mode, S_IRGRP, S_IWGRP, S_IXGRP);
3408 * FIXME: The ACL_MASK entry permissions should really be set to
3409 * the union of the permissions of all ACL_USER,
3410 * ACL_GROUP_OBJ, and ACL_GROUP entries. That's what
3411 * acl_calc_mask() does, but Samba ACLs doesn't provide it.
3413 perms = S_IRUSR|S_IWUSR|S_IXUSR;
3416 perms = unix_perms_to_acl_perms(mode, S_IROTH, S_IWOTH, S_IXOTH);
3422 if (map_acl_perms_to_permset(conn, perms, &permset) == -1)
3425 if (SMB_VFS_SYS_ACL_SET_PERMSET(conn, entry, permset) == -1)
3430 * If this is a simple 3 element ACL or no elements then it's a standard
3431 * UNIX permission set. Just use chmod...
3434 if ((num_entries == 3) || (num_entries == 0))
3440 /****************************************************************************
3441 Get the access ACL of FROM, do a chmod by setting the ACL USER_OBJ,
3442 GROUP_OBJ and OTHER bits in an ACL and set the mask to rwx. Set the
3443 resulting ACL on TO. Note that name is in UNIX character set.
3444 ****************************************************************************/
3446 static int copy_access_acl(connection_struct *conn, const char *from, const char *to, mode_t mode)
3448 SMB_ACL_T posix_acl = NULL;
3451 if ((posix_acl = SMB_VFS_SYS_ACL_GET_FILE(conn, from, SMB_ACL_TYPE_ACCESS)) == NULL)
3454 if ((ret = chmod_acl_internals(conn, posix_acl, mode)) == -1)
3457 ret = SMB_VFS_SYS_ACL_SET_FILE(conn, to, SMB_ACL_TYPE_ACCESS, posix_acl);
3461 SMB_VFS_SYS_ACL_FREE_ACL(conn, posix_acl);
3465 /****************************************************************************
3466 Do a chmod by setting the ACL USER_OBJ, GROUP_OBJ and OTHER bits in an ACL
3467 and set the mask to rwx. Needed to preserve complex ACLs set by NT.
3468 Note that name is in UNIX character set.
3469 ****************************************************************************/
3471 int chmod_acl(connection_struct *conn, const char *name, mode_t mode)
3473 return copy_access_acl(conn, name, name, mode);
3476 /****************************************************************************
3477 If "inherit permissions" is set and the parent directory has no default
3478 ACL but it does have an Access ACL, inherit this Access ACL to file name.
3479 ****************************************************************************/
3481 int inherit_access_acl(connection_struct *conn, const char *name, mode_t mode)
3484 pstrcpy(dirname, parent_dirname(name));
3486 if (!lp_inherit_perms(SNUM(conn)) || directory_has_default_acl(conn, dirname))
3489 return copy_access_acl(conn, dirname, name, mode);
3492 /****************************************************************************
3493 Do an fchmod by setting the ACL USER_OBJ, GROUP_OBJ and OTHER bits in an ACL
3494 and set the mask to rwx. Needed to preserve complex ACLs set by NT.
3495 ****************************************************************************/
3497 int fchmod_acl(files_struct *fsp, int fd, mode_t mode)
3499 connection_struct *conn = fsp->conn;
3500 SMB_ACL_T posix_acl = NULL;
3503 if ((posix_acl = SMB_VFS_SYS_ACL_GET_FD(fsp, fd)) == NULL)
3506 if ((ret = chmod_acl_internals(conn, posix_acl, mode)) == -1)
3509 ret = SMB_VFS_SYS_ACL_SET_FD(fsp, fd, posix_acl);
3513 SMB_VFS_SYS_ACL_FREE_ACL(conn, posix_acl);
3517 /****************************************************************************
3518 Check for an existing default POSIX ACL on a directory.
3519 ****************************************************************************/
3521 BOOL directory_has_default_acl(connection_struct *conn, const char *fname)
3523 SMB_ACL_T def_acl = SMB_VFS_SYS_ACL_GET_FILE( conn, fname, SMB_ACL_TYPE_DEFAULT);
3524 BOOL has_acl = False;
3525 SMB_ACL_ENTRY_T entry;
3527 if (def_acl != NULL && (SMB_VFS_SYS_ACL_GET_ENTRY(conn, def_acl, SMB_ACL_FIRST_ENTRY, &entry) == 1)) {
3532 SMB_VFS_SYS_ACL_FREE_ACL(conn, def_acl);
3537 /****************************************************************************
3538 Map from wire type to permset.
3539 ****************************************************************************/
3541 static BOOL unix_ex_wire_to_permset(connection_struct *conn, unsigned char wire_perm, SMB_ACL_PERMSET_T *p_permset)
3543 if (wire_perm & ~(SMB_POSIX_ACL_READ|SMB_POSIX_ACL_WRITE|SMB_POSIX_ACL_EXECUTE)) {
3547 if (SMB_VFS_SYS_ACL_CLEAR_PERMS(conn, *p_permset) == -1) {
3551 if (wire_perm & SMB_POSIX_ACL_READ) {
3552 if (SMB_VFS_SYS_ACL_ADD_PERM(conn, *p_permset, SMB_ACL_READ) == -1) {
3556 if (wire_perm & SMB_POSIX_ACL_WRITE) {
3557 if (SMB_VFS_SYS_ACL_ADD_PERM(conn, *p_permset, SMB_ACL_WRITE) == -1) {
3561 if (wire_perm & SMB_POSIX_ACL_EXECUTE) {
3562 if (SMB_VFS_SYS_ACL_ADD_PERM(conn, *p_permset, SMB_ACL_EXECUTE) == -1) {
3569 /****************************************************************************
3570 Map from wire type to tagtype.
3571 ****************************************************************************/
3573 static BOOL unix_ex_wire_to_tagtype(unsigned char wire_tt, SMB_ACL_TAG_T *p_tt)
3576 case SMB_POSIX_ACL_USER_OBJ:
3577 *p_tt = SMB_ACL_USER_OBJ;
3579 case SMB_POSIX_ACL_USER:
3580 *p_tt = SMB_ACL_USER;
3582 case SMB_POSIX_ACL_GROUP_OBJ:
3583 *p_tt = SMB_ACL_GROUP_OBJ;
3585 case SMB_POSIX_ACL_GROUP:
3586 *p_tt = SMB_ACL_GROUP;
3588 case SMB_POSIX_ACL_MASK:
3589 *p_tt = SMB_ACL_MASK;
3591 case SMB_POSIX_ACL_OTHER:
3592 *p_tt = SMB_ACL_OTHER;
3600 /****************************************************************************
3601 Create a new POSIX acl from wire permissions.
3602 FIXME ! How does the share mask/mode fit into this.... ?
3603 ****************************************************************************/
3605 static SMB_ACL_T create_posix_acl_from_wire(connection_struct *conn, uint16 num_acls, const char *pdata)
3608 SMB_ACL_T the_acl = SMB_VFS_SYS_ACL_INIT(conn, num_acls);
3610 if (the_acl == NULL) {
3614 for (i = 0; i < num_acls; i++) {
3615 SMB_ACL_ENTRY_T the_entry;
3616 SMB_ACL_PERMSET_T the_permset;
3617 SMB_ACL_TAG_T tag_type;
3619 if (SMB_VFS_SYS_ACL_CREATE_ENTRY(conn, &the_acl, &the_entry) == -1) {
3620 DEBUG(0,("create_posix_acl_from_wire: Failed to create entry %u. (%s)\n",
3621 i, strerror(errno) ));
3625 if (!unix_ex_wire_to_tagtype(CVAL(pdata,(i*SMB_POSIX_ACL_ENTRY_SIZE)), &tag_type)) {
3626 DEBUG(0,("create_posix_acl_from_wire: invalid wire tagtype %u on entry %u.\n",
3627 CVAL(pdata,(i*SMB_POSIX_ACL_ENTRY_SIZE)), i ));
3631 if (SMB_VFS_SYS_ACL_SET_TAG_TYPE(conn, the_entry, tag_type) == -1) {
3632 DEBUG(0,("create_posix_acl_from_wire: Failed to set tagtype on entry %u. (%s)\n",
3633 i, strerror(errno) ));
3637 /* Get the permset pointer from the new ACL entry. */
3638 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, the_entry, &the_permset) == -1) {
3639 DEBUG(0,("create_posix_acl_from_wire: Failed to get permset on entry %u. (%s)\n",
3640 i, strerror(errno) ));
3644 /* Map from wire to permissions. */
3645 if (!unix_ex_wire_to_permset(conn, CVAL(pdata,(i*SMB_POSIX_ACL_ENTRY_SIZE)+1), &the_permset)) {
3646 DEBUG(0,("create_posix_acl_from_wire: invalid permset %u on entry %u.\n",
3647 CVAL(pdata,(i*SMB_POSIX_ACL_ENTRY_SIZE) + 1), i ));
3651 /* Now apply to the new ACL entry. */
3652 if (SMB_VFS_SYS_ACL_SET_PERMSET(conn, the_entry, the_permset) == -1) {
3653 DEBUG(0,("create_posix_acl_from_wire: Failed to add permset on entry %u. (%s)\n",
3654 i, strerror(errno) ));
3658 if (tag_type == SMB_ACL_USER) {
3659 uint32 uidval = IVAL(pdata,(i*SMB_POSIX_ACL_ENTRY_SIZE)+2);
3660 uid_t uid = (uid_t)uidval;
3661 if (SMB_VFS_SYS_ACL_SET_QUALIFIER(conn, the_entry,(void *)&uid) == -1) {
3662 DEBUG(0,("create_posix_acl_from_wire: Failed to set uid %u on entry %u. (%s)\n",
3663 (unsigned int)uid, i, strerror(errno) ));
3668 if (tag_type == SMB_ACL_GROUP) {
3669 uint32 gidval = IVAL(pdata,(i*SMB_POSIX_ACL_ENTRY_SIZE)+2);
3670 gid_t gid = (uid_t)gidval;
3671 if (SMB_VFS_SYS_ACL_SET_QUALIFIER(conn, the_entry,(void *)&gid) == -1) {
3672 DEBUG(0,("create_posix_acl_from_wire: Failed to set gid %u on entry %u. (%s)\n",
3673 (unsigned int)gid, i, strerror(errno) ));
3683 if (the_acl != NULL) {
3684 SMB_VFS_SYS_ACL_FREE_ACL(conn, the_acl);
3689 /****************************************************************************
3690 Calls from UNIX extensions - Default POSIX ACL set.
3691 If num_def_acls == 0 and not a directory just return. If it is a directory
3692 and num_def_acls == 0 then remove the default acl. Else set the default acl
3694 ****************************************************************************/
3696 BOOL set_unix_posix_default_acl(connection_struct *conn, const char *fname, SMB_STRUCT_STAT *psbuf,
3697 uint16 num_def_acls, const char *pdata)
3699 SMB_ACL_T def_acl = NULL;
3701 if (num_def_acls && !S_ISDIR(psbuf->st_mode)) {
3702 DEBUG(5,("set_unix_posix_default_acl: Can't set default ACL on non-directory file %s\n", fname ));
3707 if (!num_def_acls) {
3708 /* Remove the default ACL. */
3709 if (SMB_VFS_SYS_ACL_DELETE_DEF_FILE(conn, fname) == -1) {
3710 DEBUG(5,("set_unix_posix_default_acl: acl_delete_def_file failed on directory %s (%s)\n",
3711 fname, strerror(errno) ));
3717 if ((def_acl = create_posix_acl_from_wire(conn, num_def_acls, pdata)) == NULL) {
3721 if (SMB_VFS_SYS_ACL_SET_FILE(conn, fname, SMB_ACL_TYPE_DEFAULT, def_acl) == -1) {
3722 DEBUG(5,("set_unix_posix_default_acl: acl_set_file failed on directory %s (%s)\n",
3723 fname, strerror(errno) ));
3724 SMB_VFS_SYS_ACL_FREE_ACL(conn, def_acl);
3728 DEBUG(10,("set_unix_posix_default_acl: set default acl for file %s\n", fname ));
3729 SMB_VFS_SYS_ACL_FREE_ACL(conn, def_acl);
3733 /****************************************************************************
3734 Remove an ACL from a file. As we don't have acl_delete_entry() available
3735 we must read the current acl and copy all entries except MASK, USER and GROUP
3736 to a new acl, then set that. This (at least on Linux) causes any ACL to be
3738 FIXME ! How does the share mask/mode fit into this.... ?
3739 ****************************************************************************/
3741 static BOOL remove_posix_acl(connection_struct *conn, files_struct *fsp, const char *fname)
3743 SMB_ACL_T file_acl = NULL;
3744 int entry_id = SMB_ACL_FIRST_ENTRY;
3745 SMB_ACL_ENTRY_T entry;
3747 /* Create a new ACL with only 3 entries, u/g/w. */
3748 SMB_ACL_T new_file_acl = SMB_VFS_SYS_ACL_INIT(conn, 3);
3749 SMB_ACL_ENTRY_T user_ent = NULL;
3750 SMB_ACL_ENTRY_T group_ent = NULL;
3751 SMB_ACL_ENTRY_T other_ent = NULL;
3753 if (new_file_acl == NULL) {
3754 DEBUG(5,("remove_posix_acl: failed to init new ACL with 3 entries for file %s.\n", fname));
3758 /* Now create the u/g/w entries. */
3759 if (SMB_VFS_SYS_ACL_CREATE_ENTRY(conn, &new_file_acl, &user_ent) == -1) {
3760 DEBUG(5,("remove_posix_acl: Failed to create user entry for file %s. (%s)\n",
3761 fname, strerror(errno) ));
3764 if (SMB_VFS_SYS_ACL_SET_TAG_TYPE(conn, user_ent, SMB_ACL_USER_OBJ) == -1) {
3765 DEBUG(5,("remove_posix_acl: Failed to set user entry for file %s. (%s)\n",
3766 fname, strerror(errno) ));
3770 if (SMB_VFS_SYS_ACL_CREATE_ENTRY(conn, &new_file_acl, &group_ent) == -1) {
3771 DEBUG(5,("remove_posix_acl: Failed to create group entry for file %s. (%s)\n",
3772 fname, strerror(errno) ));
3775 if (SMB_VFS_SYS_ACL_SET_TAG_TYPE(conn, group_ent, SMB_ACL_GROUP_OBJ) == -1) {
3776 DEBUG(5,("remove_posix_acl: Failed to set group entry for file %s. (%s)\n",
3777 fname, strerror(errno) ));
3781 if (SMB_VFS_SYS_ACL_CREATE_ENTRY(conn, &new_file_acl, &other_ent) == -1) {
3782 DEBUG(5,("remove_posix_acl: Failed to create other entry for file %s. (%s)\n",
3783 fname, strerror(errno) ));
3786 if (SMB_VFS_SYS_ACL_SET_TAG_TYPE(conn, other_ent, SMB_ACL_OTHER) == -1) {
3787 DEBUG(5,("remove_posix_acl: Failed to set other entry for file %s. (%s)\n",
3788 fname, strerror(errno) ));
3792 /* Get the current file ACL. */
3793 if (fsp && fsp->fh->fd != -1) {
3794 file_acl = SMB_VFS_SYS_ACL_GET_FD(fsp, fsp->fh->fd);
3796 file_acl = SMB_VFS_SYS_ACL_GET_FILE( conn, fname, SMB_ACL_TYPE_ACCESS);
3799 if (file_acl == NULL) {
3800 /* This is only returned if an error occurred. Even for a file with
3801 no acl a u/g/w acl should be returned. */
3802 DEBUG(5,("remove_posix_acl: failed to get ACL from file %s (%s).\n",
3803 fname, strerror(errno) ));
3807 while ( SMB_VFS_SYS_ACL_GET_ENTRY(conn, file_acl, entry_id, &entry) == 1) {
3808 SMB_ACL_TAG_T tagtype;
3809 SMB_ACL_PERMSET_T permset;
3812 if (entry_id == SMB_ACL_FIRST_ENTRY)
3813 entry_id = SMB_ACL_NEXT_ENTRY;
3815 if (SMB_VFS_SYS_ACL_GET_TAG_TYPE(conn, entry, &tagtype) == -1) {
3816 DEBUG(5,("remove_posix_acl: failed to get tagtype from ACL on file %s (%s).\n",
3817 fname, strerror(errno) ));
3821 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, entry, &permset) == -1) {
3822 DEBUG(5,("remove_posix_acl: failed to get permset from ACL on file %s (%s).\n",
3823 fname, strerror(errno) ));
3827 if (tagtype == SMB_ACL_USER_OBJ) {
3828 if (SMB_VFS_SYS_ACL_SET_PERMSET(conn, user_ent, permset) == -1) {
3829 DEBUG(5,("remove_posix_acl: failed to set permset from ACL on file %s (%s).\n",
3830 fname, strerror(errno) ));
3832 } else if (tagtype == SMB_ACL_GROUP_OBJ) {
3833 if (SMB_VFS_SYS_ACL_SET_PERMSET(conn, group_ent, permset) == -1) {
3834 DEBUG(5,("remove_posix_acl: failed to set permset from ACL on file %s (%s).\n",
3835 fname, strerror(errno) ));
3837 } else if (tagtype == SMB_ACL_OTHER) {
3838 if (SMB_VFS_SYS_ACL_SET_PERMSET(conn, other_ent, permset) == -1) {
3839 DEBUG(5,("remove_posix_acl: failed to set permset from ACL on file %s (%s).\n",
3840 fname, strerror(errno) ));
3850 SMB_VFS_SYS_ACL_FREE_ACL(conn, file_acl);
3853 SMB_VFS_SYS_ACL_FREE_ACL(conn, new_file_acl);
3858 /****************************************************************************
3859 Calls from UNIX extensions - POSIX ACL set.
3860 If num_def_acls == 0 then read/modify/write acl after removing all entries
3861 except SMB_ACL_USER_OBJ, SMB_ACL_GROUP_OBJ, SMB_ACL_OTHER.
3862 ****************************************************************************/
3864 BOOL set_unix_posix_acl(connection_struct *conn, files_struct *fsp, const char *fname, uint16 num_acls, const char *pdata)
3866 SMB_ACL_T file_acl = NULL;
3869 /* Remove the ACL from the file. */
3870 return remove_posix_acl(conn, fsp, fname);
3873 if ((file_acl = create_posix_acl_from_wire(conn, num_acls, pdata)) == NULL) {
3877 if (fsp && fsp->fh->fd != -1) {
3878 /* The preferred way - use an open fd. */
3879 if (SMB_VFS_SYS_ACL_SET_FD(fsp, fsp->fh->fd, file_acl) == -1) {
3880 DEBUG(5,("set_unix_posix_acl: acl_set_file failed on %s (%s)\n",
3881 fname, strerror(errno) ));
3882 SMB_VFS_SYS_ACL_FREE_ACL(conn, file_acl);
3886 if (SMB_VFS_SYS_ACL_SET_FILE(conn, fname, SMB_ACL_TYPE_ACCESS, file_acl) == -1) {
3887 DEBUG(5,("set_unix_posix_acl: acl_set_file failed on %s (%s)\n",
3888 fname, strerror(errno) ));
3889 SMB_VFS_SYS_ACL_FREE_ACL(conn, file_acl);
3894 DEBUG(10,("set_unix_posix_acl: set acl for file %s\n", fname ));
3895 SMB_VFS_SYS_ACL_FREE_ACL(conn, file_acl);
3899 /****************************************************************************
3900 Check for POSIX group ACLs. If none use stat entry.
3901 Return -1 if no match, 0 if match and denied, 1 if match and allowed.
3902 ****************************************************************************/
3904 static int check_posix_acl_group_write(connection_struct *conn, const char *fname, SMB_STRUCT_STAT *psbuf)
3906 SMB_ACL_T posix_acl = NULL;
3907 int entry_id = SMB_ACL_FIRST_ENTRY;
3908 SMB_ACL_ENTRY_T entry;
3910 BOOL seen_mask = False;
3911 BOOL seen_owning_group = False;
3915 if ((posix_acl = SMB_VFS_SYS_ACL_GET_FILE(conn, fname, SMB_ACL_TYPE_ACCESS)) == NULL) {
3919 /* First ensure the group mask allows group read. */
3920 /* Also check any user entries (these take preference over group). */
3922 while ( SMB_VFS_SYS_ACL_GET_ENTRY(conn, posix_acl, entry_id, &entry) == 1) {
3923 SMB_ACL_TAG_T tagtype;
3924 SMB_ACL_PERMSET_T permset;
3925 int have_write = -1;
3928 if (entry_id == SMB_ACL_FIRST_ENTRY)
3929 entry_id = SMB_ACL_NEXT_ENTRY;
3931 if (SMB_VFS_SYS_ACL_GET_TAG_TYPE(conn, entry, &tagtype) == -1) {
3935 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, entry, &permset) == -1) {
3939 have_write = SMB_VFS_SYS_ACL_GET_PERM(conn, permset, SMB_ACL_WRITE);
3940 if (have_write == -1) {
3945 * Solaris returns 2 for this if write is available.
3946 * canonicalize to 0 or 1.
3948 have_write = (have_write ? 1 : 0);
3954 /* We don't have any group or explicit user write permission. */
3955 ret = -1; /* Allow caller to check "other" permissions. */
3956 DEBUG(10,("check_posix_acl_group_write: file %s \
3957 refusing write due to mask.\n", fname));
3963 /* Check against current_user.uid. */
3964 uid_t *puid = (uid_t *)SMB_VFS_SYS_ACL_GET_QUALIFIER(conn, entry);
3968 if (current_user.uid == *puid) {
3969 /* We have a uid match but we must ensure we have seen the acl mask. */
3971 DEBUG(10,("check_posix_acl_group_write: file %s \
3972 match on user %u -> %s.\n", fname, (unsigned int)*puid, ret ? "can write" : "cannot write"));
3984 /* If ret is anything other than -1 we matched on a user entry. */
3989 /* Next check all group entries. */
3990 entry_id = SMB_ACL_FIRST_ENTRY;
3991 while ( SMB_VFS_SYS_ACL_GET_ENTRY(conn, posix_acl, entry_id, &entry) == 1) {
3992 SMB_ACL_TAG_T tagtype;
3993 SMB_ACL_PERMSET_T permset;
3994 int have_write = -1;
3997 if (entry_id == SMB_ACL_FIRST_ENTRY)
3998 entry_id = SMB_ACL_NEXT_ENTRY;
4000 if (SMB_VFS_SYS_ACL_GET_TAG_TYPE(conn, entry, &tagtype) == -1) {
4004 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, entry, &permset) == -1) {
4008 have_write = SMB_VFS_SYS_ACL_GET_PERM(conn, permset, SMB_ACL_WRITE);
4009 if (have_write == -1) {
4014 * Solaris returns 2 for this if write is available.
4015 * canonicalize to 0 or 1.
4017 have_write = (have_write ? 1 : 0);
4021 case SMB_ACL_GROUP_OBJ:
4025 if (tagtype == SMB_ACL_GROUP) {
4026 pgid = (gid_t *)SMB_VFS_SYS_ACL_GET_QUALIFIER(conn, entry);
4028 seen_owning_group = True;
4029 pgid = &psbuf->st_gid;
4036 * Does it match the current effective group
4037 * or supplementary groups ?
4039 for (cu_gid = get_current_user_gid_first(&i); cu_gid != (gid_t)-1;
4040 cu_gid = get_current_user_gid_next(&i)) {
4041 if (cu_gid == *pgid) {
4043 DEBUG(10,("check_posix_acl_group_write: file %s \
4044 match on group %u -> can write.\n", fname, (unsigned int)cu_gid ));
4046 /* If we don't have write permission this entry doesn't
4047 terminate the enumeration of the entries. */
4051 /* But does terminate the group iteration. */
4062 /* If ret is -1 here we didn't match on the user entry or
4063 supplemental group entries. */
4065 DEBUG(10,("check_posix_acl_group_write: ret = %d before check_stat:\n", ret));
4070 * We only check the S_IWGRP permissions if we haven't already
4071 * seen an owning group SMB_ACL_GROUP_OBJ ace entry. If there is an
4072 * SMB_ACL_GROUP_OBJ ace entry then the group bits in st_gid are
4073 * the same as the SMB_ACL_MASK bits, not the SMB_ACL_GROUP_OBJ
4074 * bits. Thanks to Marc Cousin <mcousin@sigma.fr> for pointing
4078 if (!seen_owning_group) {
4079 /* Do we match on the owning group entry ? */
4081 * Does it match the current effective group
4082 * or supplementary groups ?
4084 for (cu_gid = get_current_user_gid_first(&i); cu_gid != (gid_t)-1;
4085 cu_gid = get_current_user_gid_next(&i)) {
4086 if (cu_gid == psbuf->st_gid) {
4087 ret = (psbuf->st_mode & S_IWGRP) ? 1 : 0;
4088 DEBUG(10,("check_posix_acl_group_write: file %s \
4089 match on owning group %u -> %s.\n", fname, (unsigned int)psbuf->st_gid, ret ? "can write" : "cannot write"));
4094 if (cu_gid == (gid_t)-1) {
4095 DEBUG(10,("check_posix_acl_group_write: file %s \
4096 failed to match on user or group in token (ret = %d).\n", fname, ret ));
4103 SMB_VFS_SYS_ACL_FREE_ACL(conn, posix_acl);
4106 DEBUG(10,("check_posix_acl_group_write: file %s returning (ret = %d).\n", fname, ret ));
4110 /****************************************************************************
4111 Actually emulate the in-kernel access checking for delete access. We need
4112 this to successfully return ACCESS_DENIED on a file open for delete access.
4113 ****************************************************************************/
4115 BOOL can_delete_file_in_directory(connection_struct *conn, const char *fname)
4117 SMB_STRUCT_STAT sbuf;
4121 if (!CAN_WRITE(conn)) {
4125 /* Get the parent directory permission mask and owners. */
4126 pstrcpy(dname, parent_dirname(fname));
4127 if(SMB_VFS_STAT(conn, dname, &sbuf) != 0) {
4130 if (!S_ISDIR(sbuf.st_mode)) {
4133 if (current_user.uid == 0 || conn->admin_user) {
4134 /* I'm sorry sir, I didn't know you were root... */
4138 /* Check primary owner write access. */
4139 if (current_user.uid == sbuf.st_uid) {
4140 return (sbuf.st_mode & S_IWUSR) ? True : False;
4144 /* sticky bit means delete only by owner or root. */
4145 if (sbuf.st_mode & S_ISVTX) {
4146 SMB_STRUCT_STAT sbuf_file;
4147 if(SMB_VFS_STAT(conn, fname, &sbuf_file) != 0) {
4151 * Patch from SATOH Fumiyasu <fumiyas@miraclelinux.com>
4152 * for bug #3348. Don't assume owning sticky bit
4153 * directory means write access allowed.
4155 if (current_user.uid != sbuf_file.st_uid) {
4161 /* Check group or explicit user acl entry write access. */
4162 ret = check_posix_acl_group_write(conn, dname, &sbuf);
4163 if (ret == 0 || ret == 1) {
4164 return ret ? True : False;
4167 /* Finally check other write access. */
4168 return (sbuf.st_mode & S_IWOTH) ? True : False;
4171 /****************************************************************************
4172 Actually emulate the in-kernel access checking for write access. We need
4173 this to successfully check for ability to write for dos filetimes.
4174 Note this doesn't take into account share write permissions.
4175 ****************************************************************************/
4177 BOOL can_write_to_file(connection_struct *conn, const char *fname, SMB_STRUCT_STAT *psbuf)
4181 if (current_user.uid == 0 || conn->admin_user) {
4182 /* I'm sorry sir, I didn't know you were root... */
4186 if (!VALID_STAT(*psbuf)) {
4187 /* Get the file permission mask and owners. */
4188 if(SMB_VFS_STAT(conn, fname, psbuf) != 0) {
4193 /* Check primary owner write access. */
4194 if (current_user.uid == psbuf->st_uid) {
4195 return (psbuf->st_mode & S_IWUSR) ? True : False;
4198 /* Check group or explicit user acl entry write access. */
4199 ret = check_posix_acl_group_write(conn, fname, psbuf);
4200 if (ret == 0 || ret == 1) {
4201 return ret ? True : False;
4204 /* Finally check other write access. */
4205 return (psbuf->st_mode & S_IWOTH) ? True : False;
4208 /********************************************************************
4209 Pull the NT ACL from a file on disk or the OpenEventlog() access
4210 check. Caller is responsible for freeing the returned security
4211 descriptor via TALLOC_FREE(). This is designed for dealing with
4212 user space access checks in smbd outside of the VFS. For example,
4213 checking access rights in OpenEventlog().
4215 Assume we are dealing with files (for now)
4216 ********************************************************************/
4218 SEC_DESC* get_nt_acl_no_snum( TALLOC_CTX *ctx, const char *fname)
4220 SEC_DESC *psd, *ret_sd;
4221 connection_struct conn;
4223 struct fd_handle fh;
4227 ZERO_STRUCT( conn );
4230 if ( !(conn.mem_ctx = talloc_init( "novfs_get_nt_acl" )) ) {
4231 DEBUG(0,("get_nt_acl_no_snum: talloc() failed!\n"));
4235 fstrcpy( path, "/" );
4236 string_set(&conn.connectpath, path);
4238 if (!smbd_vfs_init(&conn)) {
4239 DEBUG(0,("get_nt_acl_no_snum: Unable to create a fake connection struct!\n"));
4240 conn_free_internal( &conn );
4244 ZERO_STRUCT( finfo );
4251 pstrcpy( filename, fname );
4252 finfo.fsp_name = filename;
4254 if (get_nt_acl( &finfo, DACL_SECURITY_INFORMATION, &psd ) == 0) {
4255 DEBUG(0,("get_nt_acl_no_snum: get_nt_acl returned zero.\n"));
4256 conn_free_internal( &conn );
4260 ret_sd = dup_sec_desc( ctx, psd );
4262 conn_free_internal( &conn );