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 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,(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 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 (!protected && num_inherited_entries(file_ace_list) == 0 && num_inherited_entries(dir_ace_list) == 0) {
231 /* Instead just remove the attribute if it exists. */
233 SMB_VFS_FREMOVEXATTR(fsp, fsp->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, protected, &store_size);
242 ret = SMB_VFS_FSETXATTR(fsp, fsp->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", 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->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->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->protected ? " (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)
449 ret = SMB_VFS_FGETXATTR(fsp, fsp->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->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 *pacl_type, DOM_SID *powner_sid, canon_ace *ace)
809 *pacl_type = SEC_ACE_TYPE_ACCESS_ALLOWED;
811 if ((ace->perms & ALL_ACE_PERMS) == ALL_ACE_PERMS) {
812 nt_mask = UNIX_ACCESS_RWX;
813 } else if ((ace->perms & ALL_ACE_PERMS) == (mode_t)0) {
815 * Windows NT refuses to display ACEs with no permissions in them (but
816 * they are perfectly legal with Windows 2000). If the ACE has empty
817 * permissions we cannot use 0, so we use the otherwise unused
818 * WRITE_OWNER permission, which we ignore when we set an ACL.
819 * We abstract this into a #define of UNIX_ACCESS_NONE to allow this
820 * to be changed in the future.
823 if (nt4_compatible_acls())
824 nt_mask = UNIX_ACCESS_NONE;
828 nt_mask |= ((ace->perms & S_IRUSR) ? UNIX_ACCESS_R : 0 );
829 nt_mask |= ((ace->perms & S_IWUSR) ? UNIX_ACCESS_W : 0 );
830 nt_mask |= ((ace->perms & S_IXUSR) ? UNIX_ACCESS_X : 0 );
833 DEBUG(10,("map_canon_ace_perms: Mapped (UNIX) %x to (NT) %x\n",
834 (unsigned int)ace->perms, (unsigned int)nt_mask ));
836 init_sec_access(&sa,nt_mask);
840 /****************************************************************************
841 Map NT perms to a UNIX mode_t.
842 ****************************************************************************/
844 #define FILE_SPECIFIC_READ_BITS (FILE_READ_DATA|FILE_READ_EA|FILE_READ_ATTRIBUTES)
845 #define FILE_SPECIFIC_WRITE_BITS (FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_WRITE_EA|FILE_WRITE_ATTRIBUTES)
846 #define FILE_SPECIFIC_EXECUTE_BITS (FILE_EXECUTE)
848 static mode_t map_nt_perms( SEC_ACCESS sec_access, int type)
854 if(sec_access.mask & GENERIC_ALL_ACCESS)
855 mode = S_IRUSR|S_IWUSR|S_IXUSR;
857 mode |= (sec_access.mask & (GENERIC_READ_ACCESS|FILE_SPECIFIC_READ_BITS)) ? S_IRUSR : 0;
858 mode |= (sec_access.mask & (GENERIC_WRITE_ACCESS|FILE_SPECIFIC_WRITE_BITS)) ? S_IWUSR : 0;
859 mode |= (sec_access.mask & (GENERIC_EXECUTE_ACCESS|FILE_SPECIFIC_EXECUTE_BITS)) ? S_IXUSR : 0;
863 if(sec_access.mask & GENERIC_ALL_ACCESS)
864 mode = S_IRGRP|S_IWGRP|S_IXGRP;
866 mode |= (sec_access.mask & (GENERIC_READ_ACCESS|FILE_SPECIFIC_READ_BITS)) ? S_IRGRP : 0;
867 mode |= (sec_access.mask & (GENERIC_WRITE_ACCESS|FILE_SPECIFIC_WRITE_BITS)) ? S_IWGRP : 0;
868 mode |= (sec_access.mask & (GENERIC_EXECUTE_ACCESS|FILE_SPECIFIC_EXECUTE_BITS)) ? S_IXGRP : 0;
872 if(sec_access.mask & GENERIC_ALL_ACCESS)
873 mode = S_IROTH|S_IWOTH|S_IXOTH;
875 mode |= (sec_access.mask & (GENERIC_READ_ACCESS|FILE_SPECIFIC_READ_BITS)) ? S_IROTH : 0;
876 mode |= (sec_access.mask & (GENERIC_WRITE_ACCESS|FILE_SPECIFIC_WRITE_BITS)) ? S_IWOTH : 0;
877 mode |= (sec_access.mask & (GENERIC_EXECUTE_ACCESS|FILE_SPECIFIC_EXECUTE_BITS)) ? S_IXOTH : 0;
885 /****************************************************************************
886 Unpack a SEC_DESC into a UNIX owner and group.
887 ****************************************************************************/
889 static BOOL unpack_nt_owners(int snum, SMB_STRUCT_STAT *psbuf, uid_t *puser, gid_t *pgrp, uint32 security_info_sent, SEC_DESC *psd)
897 if(security_info_sent == 0) {
898 DEBUG(0,("unpack_nt_owners: no security info sent !\n"));
903 * Validate the owner and group SID's.
906 memset(&owner_sid, '\0', sizeof(owner_sid));
907 memset(&grp_sid, '\0', sizeof(grp_sid));
909 DEBUG(5,("unpack_nt_owners: validating owner_sids.\n"));
912 * Don't immediately fail if the owner sid cannot be validated.
913 * This may be a group chown only set.
916 if (security_info_sent & OWNER_SECURITY_INFORMATION) {
917 sid_copy(&owner_sid, psd->owner_sid);
918 if (!NT_STATUS_IS_OK(sid_to_uid(&owner_sid, puser))) {
919 if (lp_force_unknown_acl_user(snum)) {
920 /* this allows take ownership to work
922 *puser = current_user.uid;
924 DEBUG(3,("unpack_nt_owners: unable to validate"
925 " owner sid for %s\n",
926 sid_string_static(&owner_sid)));
933 * Don't immediately fail if the group sid cannot be validated.
934 * This may be an owner chown only set.
937 if (security_info_sent & GROUP_SECURITY_INFORMATION) {
938 sid_copy(&grp_sid, psd->grp_sid);
939 if (!NT_STATUS_IS_OK(sid_to_gid( &grp_sid, pgrp))) {
940 if (lp_force_unknown_acl_user(snum)) {
941 /* this allows take group ownership to work
943 *pgrp = current_user.gid;
945 DEBUG(3,("unpack_nt_owners: unable to validate"
952 DEBUG(5,("unpack_nt_owners: owner_sids validated.\n"));
957 /****************************************************************************
958 Ensure the enforced permissions for this share apply.
959 ****************************************************************************/
961 static void apply_default_perms(files_struct *fsp, canon_ace *pace, mode_t type)
963 int snum = SNUM(fsp->conn);
964 mode_t and_bits = (mode_t)0;
965 mode_t or_bits = (mode_t)0;
967 /* Get the initial bits to apply. */
969 if (fsp->is_directory) {
970 and_bits = lp_dir_security_mask(snum);
971 or_bits = lp_force_dir_security_mode(snum);
973 and_bits = lp_security_mask(snum);
974 or_bits = lp_force_security_mode(snum);
977 /* Now bounce them into the S_USR space. */
980 /* Ensure owner has read access. */
981 pace->perms |= S_IRUSR;
982 if (fsp->is_directory)
983 pace->perms |= (S_IWUSR|S_IXUSR);
984 and_bits = unix_perms_to_acl_perms(and_bits, S_IRUSR, S_IWUSR, S_IXUSR);
985 or_bits = unix_perms_to_acl_perms(or_bits, S_IRUSR, S_IWUSR, S_IXUSR);
988 and_bits = unix_perms_to_acl_perms(and_bits, S_IRGRP, S_IWGRP, S_IXGRP);
989 or_bits = unix_perms_to_acl_perms(or_bits, S_IRGRP, S_IWGRP, S_IXGRP);
992 and_bits = unix_perms_to_acl_perms(and_bits, S_IROTH, S_IWOTH, S_IXOTH);
993 or_bits = unix_perms_to_acl_perms(or_bits, S_IROTH, S_IWOTH, S_IXOTH);
997 pace->perms = ((pace->perms & and_bits)|or_bits);
1000 /****************************************************************************
1001 Check if a given uid/SID is in a group gid/SID. This is probably very
1002 expensive and will need optimisation. A *lot* of optimisation :-). JRA.
1003 ****************************************************************************/
1005 static BOOL uid_entry_in_group( canon_ace *uid_ace, canon_ace *group_ace )
1010 /* "Everyone" always matches every uid. */
1012 if (sid_equal(&group_ace->trustee, &global_sid_World))
1015 /* Assume that the current user is in the current group (force group) */
1017 if (uid_ace->unix_ug.uid == current_user.uid && group_ace->unix_ug.gid == current_user.gid)
1020 fstrcpy(u_name, uidtoname(uid_ace->unix_ug.uid));
1021 fstrcpy(g_name, gidtoname(group_ace->unix_ug.gid));
1024 * Due to the winbind interfaces we need to do this via names,
1028 return user_in_group_list(u_name, g_name, NULL, 0);
1031 /****************************************************************************
1032 A well formed POSIX file or default ACL has at least 3 entries, a
1033 SMB_ACL_USER_OBJ, SMB_ACL_GROUP_OBJ, SMB_ACL_OTHER_OBJ.
1034 In addition, the owner must always have at least read access.
1035 When using this call on get_acl, the pst struct is valid and contains
1036 the mode of the file. When using this call on set_acl, the pst struct has
1037 been modified to have a mode containing the default for this file or directory
1039 ****************************************************************************/
1041 static BOOL ensure_canon_entry_valid(canon_ace **pp_ace,
1043 const DOM_SID *pfile_owner_sid,
1044 const DOM_SID *pfile_grp_sid,
1045 SMB_STRUCT_STAT *pst,
1049 BOOL got_user = False;
1050 BOOL got_grp = False;
1051 BOOL got_other = False;
1052 canon_ace *pace_other = NULL;
1053 canon_ace *pace_group = NULL;
1055 for (pace = *pp_ace; pace; pace = pace->next) {
1056 if (pace->type == SMB_ACL_USER_OBJ) {
1059 apply_default_perms(fsp, pace, S_IRUSR);
1062 } else if (pace->type == SMB_ACL_GROUP_OBJ) {
1065 * Ensure create mask/force create mode is respected on set.
1069 apply_default_perms(fsp, pace, S_IRGRP);
1073 } else if (pace->type == SMB_ACL_OTHER) {
1076 * Ensure create mask/force create mode is respected on set.
1080 apply_default_perms(fsp, pace, S_IROTH);
1087 if ((pace = SMB_MALLOC_P(canon_ace)) == NULL) {
1088 DEBUG(0,("ensure_canon_entry_valid: malloc fail.\n"));
1093 pace->type = SMB_ACL_USER_OBJ;
1094 pace->owner_type = UID_ACE;
1095 pace->unix_ug.uid = pst->st_uid;
1096 pace->trustee = *pfile_owner_sid;
1097 pace->attr = ALLOW_ACE;
1100 /* If we only got an "everyone" perm, just use that. */
1101 if (!got_grp && got_other)
1102 pace->perms = pace_other->perms;
1103 else if (got_grp && uid_entry_in_group(pace, pace_group))
1104 pace->perms = pace_group->perms;
1108 apply_default_perms(fsp, pace, S_IRUSR);
1110 pace->perms = unix_perms_to_acl_perms(pst->st_mode, S_IRUSR, S_IWUSR, S_IXUSR);
1113 DLIST_ADD(*pp_ace, pace);
1117 if ((pace = SMB_MALLOC_P(canon_ace)) == NULL) {
1118 DEBUG(0,("ensure_canon_entry_valid: malloc fail.\n"));
1123 pace->type = SMB_ACL_GROUP_OBJ;
1124 pace->owner_type = GID_ACE;
1125 pace->unix_ug.uid = pst->st_gid;
1126 pace->trustee = *pfile_grp_sid;
1127 pace->attr = ALLOW_ACE;
1129 /* If we only got an "everyone" perm, just use that. */
1131 pace->perms = pace_other->perms;
1134 apply_default_perms(fsp, pace, S_IRGRP);
1136 pace->perms = unix_perms_to_acl_perms(pst->st_mode, S_IRGRP, S_IWGRP, S_IXGRP);
1139 DLIST_ADD(*pp_ace, pace);
1143 if ((pace = SMB_MALLOC_P(canon_ace)) == NULL) {
1144 DEBUG(0,("ensure_canon_entry_valid: malloc fail.\n"));
1149 pace->type = SMB_ACL_OTHER;
1150 pace->owner_type = WORLD_ACE;
1151 pace->unix_ug.world = -1;
1152 pace->trustee = global_sid_World;
1153 pace->attr = ALLOW_ACE;
1156 apply_default_perms(fsp, pace, S_IROTH);
1158 pace->perms = unix_perms_to_acl_perms(pst->st_mode, S_IROTH, S_IWOTH, S_IXOTH);
1160 DLIST_ADD(*pp_ace, pace);
1166 /****************************************************************************
1167 Check if a POSIX ACL has the required SMB_ACL_USER_OBJ and SMB_ACL_GROUP_OBJ entries.
1168 If it does not have them, check if there are any entries where the trustee is the
1169 file owner or the owning group, and map these to SMB_ACL_USER_OBJ and SMB_ACL_GROUP_OBJ.
1170 ****************************************************************************/
1172 static void check_owning_objs(canon_ace *ace, DOM_SID *pfile_owner_sid, DOM_SID *pfile_grp_sid)
1174 BOOL got_user_obj, got_group_obj;
1175 canon_ace *current_ace;
1178 entries = count_canon_ace_list(ace);
1179 got_user_obj = False;
1180 got_group_obj = False;
1182 for (i=0, current_ace = ace; i < entries; i++, current_ace = current_ace->next) {
1183 if (current_ace->type == SMB_ACL_USER_OBJ)
1184 got_user_obj = True;
1185 else if (current_ace->type == SMB_ACL_GROUP_OBJ)
1186 got_group_obj = True;
1188 if (got_user_obj && got_group_obj) {
1189 DEBUG(10,("check_owning_objs: ACL had owning user/group entries.\n"));
1193 for (i=0, current_ace = ace; i < entries; i++, current_ace = current_ace->next) {
1194 if (!got_user_obj && current_ace->owner_type == UID_ACE &&
1195 sid_equal(¤t_ace->trustee, pfile_owner_sid)) {
1196 current_ace->type = SMB_ACL_USER_OBJ;
1197 got_user_obj = True;
1199 if (!got_group_obj && current_ace->owner_type == GID_ACE &&
1200 sid_equal(¤t_ace->trustee, pfile_grp_sid)) {
1201 current_ace->type = SMB_ACL_GROUP_OBJ;
1202 got_group_obj = True;
1206 DEBUG(10,("check_owning_objs: ACL is missing an owner entry.\n"));
1208 DEBUG(10,("check_owning_objs: ACL is missing an owning group entry.\n"));
1211 /****************************************************************************
1212 Unpack a SEC_DESC into two canonical ace lists.
1213 ****************************************************************************/
1215 static BOOL create_canon_ace_lists(files_struct *fsp, SMB_STRUCT_STAT *pst,
1216 DOM_SID *pfile_owner_sid,
1217 DOM_SID *pfile_grp_sid,
1218 canon_ace **ppfile_ace, canon_ace **ppdir_ace,
1221 BOOL all_aces_are_inherit_only = (fsp->is_directory ? True : False);
1222 canon_ace *file_ace = NULL;
1223 canon_ace *dir_ace = NULL;
1224 canon_ace *tmp_ace = NULL;
1225 canon_ace *current_ace = NULL;
1226 BOOL got_dir_allow = False;
1227 BOOL got_file_allow = False;
1234 * Convert the incoming ACL into a more regular form.
1237 for(i = 0; i < dacl->num_aces; i++) {
1238 SEC_ACE *psa = &dacl->ace[i];
1240 if((psa->type != SEC_ACE_TYPE_ACCESS_ALLOWED) && (psa->type != SEC_ACE_TYPE_ACCESS_DENIED)) {
1241 DEBUG(3,("create_canon_ace_lists: unable to set anything but an ALLOW or DENY ACE.\n"));
1245 if (nt4_compatible_acls()) {
1247 * The security mask may be UNIX_ACCESS_NONE which should map into
1248 * no permissions (we overload the WRITE_OWNER bit for this) or it
1249 * should be one of the ALL/EXECUTE/READ/WRITE bits. Arrange for this
1250 * to be so. Any other bits override the UNIX_ACCESS_NONE bit.
1254 * Convert GENERIC bits to specific bits.
1257 se_map_generic(&psa->info.mask, &file_generic_mapping);
1259 psa->info.mask &= (UNIX_ACCESS_NONE|FILE_ALL_ACCESS);
1261 if(psa->info.mask != UNIX_ACCESS_NONE)
1262 psa->info.mask &= ~UNIX_ACCESS_NONE;
1267 * Deal with the fact that NT 4.x re-writes the canonical format
1268 * that we return for default ACLs. If a directory ACE is identical
1269 * to a inherited directory ACE then NT changes the bits so that the
1270 * first ACE is set to OI|IO and the second ACE for this SID is set
1271 * to CI. We need to repair this. JRA.
1274 for(i = 0; i < dacl->num_aces; i++) {
1275 SEC_ACE *psa1 = &dacl->ace[i];
1277 for (j = i + 1; j < dacl->num_aces; j++) {
1278 SEC_ACE *psa2 = &dacl->ace[j];
1280 if (psa1->info.mask != psa2->info.mask)
1283 if (!sid_equal(&psa1->trustee, &psa2->trustee))
1287 * Ok - permission bits and SIDs are equal.
1288 * Check if flags were re-written.
1291 if (psa1->flags & SEC_ACE_FLAG_INHERIT_ONLY) {
1293 psa1->flags |= (psa2->flags & (SEC_ACE_FLAG_CONTAINER_INHERIT|SEC_ACE_FLAG_OBJECT_INHERIT));
1294 psa2->flags &= ~(SEC_ACE_FLAG_CONTAINER_INHERIT|SEC_ACE_FLAG_OBJECT_INHERIT);
1296 } else if (psa2->flags & SEC_ACE_FLAG_INHERIT_ONLY) {
1298 psa2->flags |= (psa1->flags & (SEC_ACE_FLAG_CONTAINER_INHERIT|SEC_ACE_FLAG_OBJECT_INHERIT));
1299 psa1->flags &= ~(SEC_ACE_FLAG_CONTAINER_INHERIT|SEC_ACE_FLAG_OBJECT_INHERIT);
1305 for(i = 0; i < dacl->num_aces; i++) {
1306 SEC_ACE *psa = &dacl->ace[i];
1309 * Ignore non-mappable SIDs (NT Authority, BUILTIN etc).
1312 if (non_mappable_sid(&psa->trustee)) {
1314 DEBUG(10,("create_canon_ace_lists: ignoring non-mappable SID %s\n",
1315 sid_to_string(str, &psa->trustee) ));
1320 * Create a cannon_ace entry representing this NT DACL ACE.
1323 if ((current_ace = SMB_MALLOC_P(canon_ace)) == NULL) {
1324 free_canon_ace_list(file_ace);
1325 free_canon_ace_list(dir_ace);
1326 DEBUG(0,("create_canon_ace_lists: malloc fail.\n"));
1330 ZERO_STRUCTP(current_ace);
1332 sid_copy(¤t_ace->trustee, &psa->trustee);
1335 * Try and work out if the SID is a user or group
1336 * as we need to flag these differently for POSIX.
1337 * Note what kind of a POSIX ACL this should map to.
1340 if( sid_equal(¤t_ace->trustee, &global_sid_World)) {
1341 current_ace->owner_type = WORLD_ACE;
1342 current_ace->unix_ug.world = -1;
1343 current_ace->type = SMB_ACL_OTHER;
1344 } else if (sid_equal(¤t_ace->trustee, &global_sid_Creator_Owner)) {
1345 current_ace->owner_type = UID_ACE;
1346 current_ace->unix_ug.uid = pst->st_uid;
1347 current_ace->type = SMB_ACL_USER_OBJ;
1350 * The Creator Owner entry only specifies inheritable permissions,
1351 * never access permissions. WinNT doesn't always set the ACE to
1352 *INHERIT_ONLY, though.
1355 if (nt4_compatible_acls())
1356 psa->flags |= SEC_ACE_FLAG_INHERIT_ONLY;
1357 } else if (sid_equal(¤t_ace->trustee, &global_sid_Creator_Group)) {
1358 current_ace->owner_type = GID_ACE;
1359 current_ace->unix_ug.gid = pst->st_gid;
1360 current_ace->type = SMB_ACL_GROUP_OBJ;
1363 * The Creator Group entry only specifies inheritable permissions,
1364 * never access permissions. WinNT doesn't always set the ACE to
1365 *INHERIT_ONLY, though.
1367 if (nt4_compatible_acls())
1368 psa->flags |= SEC_ACE_FLAG_INHERIT_ONLY;
1370 } else if (NT_STATUS_IS_OK(sid_to_uid( ¤t_ace->trustee, ¤t_ace->unix_ug.uid))) {
1371 current_ace->owner_type = UID_ACE;
1372 current_ace->type = SMB_ACL_USER;
1373 } else if (NT_STATUS_IS_OK(sid_to_gid( ¤t_ace->trustee, ¤t_ace->unix_ug.gid))) {
1374 current_ace->owner_type = GID_ACE;
1375 current_ace->type = SMB_ACL_GROUP;
1379 free_canon_ace_list(file_ace);
1380 free_canon_ace_list(dir_ace);
1381 DEBUG(0,("create_canon_ace_lists: unable to map SID %s to uid or gid.\n",
1382 sid_to_string(str, ¤t_ace->trustee) ));
1383 SAFE_FREE(current_ace);
1388 * Map the given NT permissions into a UNIX mode_t containing only
1389 * S_I(R|W|X)USR bits.
1392 current_ace->perms |= map_nt_perms( psa->info, S_IRUSR);
1393 current_ace->attr = (psa->type == SEC_ACE_TYPE_ACCESS_ALLOWED) ? ALLOW_ACE : DENY_ACE;
1394 current_ace->inherited = ((psa->flags & SEC_ACE_FLAG_INHERITED_ACE) ? True : False);
1397 * Now add the created ace to either the file list, the directory
1398 * list, or both. We *MUST* preserve the order here (hence we use
1399 * DLIST_ADD_END) as NT ACLs are order dependent.
1402 if (fsp->is_directory) {
1405 * We can only add to the default POSIX ACE list if the ACE is
1406 * designed to be inherited by both files and directories.
1409 if ((psa->flags & (SEC_ACE_FLAG_OBJECT_INHERIT|SEC_ACE_FLAG_CONTAINER_INHERIT)) ==
1410 (SEC_ACE_FLAG_OBJECT_INHERIT|SEC_ACE_FLAG_CONTAINER_INHERIT)) {
1412 DLIST_ADD_END(dir_ace, current_ace, tmp_ace);
1415 * Note if this was an allow ace. We can't process
1416 * any further deny ace's after this.
1419 if (current_ace->attr == ALLOW_ACE)
1420 got_dir_allow = True;
1422 if ((current_ace->attr == DENY_ACE) && got_dir_allow) {
1423 DEBUG(0,("create_canon_ace_lists: malformed ACL in inheritable ACL ! \
1424 Deny entry after Allow entry. Failing to set on file %s.\n", fsp->fsp_name ));
1425 free_canon_ace_list(file_ace);
1426 free_canon_ace_list(dir_ace);
1427 SAFE_FREE(current_ace);
1431 if( DEBUGLVL( 10 )) {
1432 dbgtext("create_canon_ace_lists: adding dir ACL:\n");
1433 print_canon_ace( current_ace, 0);
1437 * If this is not an inherit only ACE we need to add a duplicate
1441 if (!(psa->flags & SEC_ACE_FLAG_INHERIT_ONLY)) {
1442 canon_ace *dup_ace = dup_canon_ace(current_ace);
1445 DEBUG(0,("create_canon_ace_lists: malloc fail !\n"));
1446 free_canon_ace_list(file_ace);
1447 free_canon_ace_list(dir_ace);
1452 * We must not free current_ace here as its
1453 * pointer is now owned by the dir_ace list.
1455 current_ace = dup_ace;
1458 * We must not free current_ace here as its
1459 * pointer is now owned by the dir_ace list.
1467 * Only add to the file ACL if not inherit only.
1470 if (!(psa->flags & SEC_ACE_FLAG_INHERIT_ONLY)) {
1471 DLIST_ADD_END(file_ace, current_ace, tmp_ace);
1474 * Note if this was an allow ace. We can't process
1475 * any further deny ace's after this.
1478 if (current_ace->attr == ALLOW_ACE)
1479 got_file_allow = True;
1481 if ((current_ace->attr == DENY_ACE) && got_file_allow) {
1482 DEBUG(0,("create_canon_ace_lists: malformed ACL in file ACL ! \
1483 Deny entry after Allow entry. Failing to set on file %s.\n", fsp->fsp_name ));
1484 free_canon_ace_list(file_ace);
1485 free_canon_ace_list(dir_ace);
1486 SAFE_FREE(current_ace);
1490 if( DEBUGLVL( 10 )) {
1491 dbgtext("create_canon_ace_lists: adding file ACL:\n");
1492 print_canon_ace( current_ace, 0);
1494 all_aces_are_inherit_only = False;
1496 * We must not free current_ace here as its
1497 * pointer is now owned by the file_ace list.
1503 * Free if ACE was not added.
1506 SAFE_FREE(current_ace);
1509 if (fsp->is_directory && all_aces_are_inherit_only) {
1511 * Windows 2000 is doing one of these weird 'inherit acl'
1512 * traverses to conserve NTFS ACL resources. Just pretend
1513 * there was no DACL sent. JRA.
1516 DEBUG(10,("create_canon_ace_lists: Win2k inherit acl traverse. Ignoring DACL.\n"));
1517 free_canon_ace_list(file_ace);
1518 free_canon_ace_list(dir_ace);
1523 * Check if we have SMB_ACL_USER_OBJ and SMB_ACL_GROUP_OBJ entries in each
1524 * ACL. If we don't have them, check if any SMB_ACL_USER/SMB_ACL_GROUP
1525 * entries can be converted to *_OBJ. Usually we will already have these
1526 * entries in the Default ACL, and the Access ACL will not have them.
1528 check_owning_objs(file_ace, pfile_owner_sid, pfile_grp_sid);
1529 check_owning_objs(dir_ace, pfile_owner_sid, pfile_grp_sid);
1532 *ppfile_ace = file_ace;
1533 *ppdir_ace = dir_ace;
1538 /****************************************************************************
1539 ASCII art time again... JRA :-).
1541 We have 4 cases to process when moving from an NT ACL to a POSIX ACL. Firstly,
1542 we insist the ACL is in canonical form (ie. all DENY entries preceede ALLOW
1543 entries). Secondly, the merge code has ensured that all duplicate SID entries for
1544 allow or deny have been merged, so the same SID can only appear once in the deny
1545 list or once in the allow list.
1547 We then process as follows :
1549 ---------------------------------------------------------------------------
1550 First pass - look for a Everyone DENY entry.
1552 If it is deny all (rwx) trunate the list at this point.
1553 Else, walk the list from this point and use the deny permissions of this
1554 entry as a mask on all following allow entries. Finally, delete
1555 the Everyone DENY entry (we have applied it to everything possible).
1557 In addition, in this pass we remove any DENY entries that have
1558 no permissions (ie. they are a DENY nothing).
1559 ---------------------------------------------------------------------------
1560 Second pass - only deal with deny user entries.
1562 DENY user1 (perms XXX)
1565 for all following allow group entries where user1 is in group
1566 new_perms |= group_perms;
1568 user1 entry perms = new_perms & ~ XXX;
1570 Convert the deny entry to an allow entry with the new perms and
1571 push to the end of the list. Note if the user was in no groups
1572 this maps to a specific allow nothing entry for this user.
1574 The common case from the NT ACL choser (userX deny all) is
1575 optimised so we don't do the group lookup - we just map to
1576 an allow nothing entry.
1578 What we're doing here is inferring the allow permissions the
1579 person setting the ACE on user1 wanted by looking at the allow
1580 permissions on the groups the user is currently in. This will
1581 be a snapshot, depending on group membership but is the best
1582 we can do and has the advantage of failing closed rather than
1584 ---------------------------------------------------------------------------
1585 Third pass - only deal with deny group entries.
1587 DENY group1 (perms XXX)
1589 for all following allow user entries where user is in group1
1590 user entry perms = user entry perms & ~ XXX;
1592 If there is a group Everyone allow entry with permissions YYY,
1593 convert the group1 entry to an allow entry and modify its
1596 new_perms = YYY & ~ XXX
1598 and push to the end of the list.
1600 If there is no group Everyone allow entry then convert the
1601 group1 entry to a allow nothing entry and push to the end of the list.
1603 Note that the common case from the NT ACL choser (groupX deny all)
1604 cannot be optimised here as we need to modify user entries who are
1605 in the group to change them to a deny all also.
1607 What we're doing here is modifying the allow permissions of
1608 user entries (which are more specific in POSIX ACLs) to mask
1609 out the explicit deny set on the group they are in. This will
1610 be a snapshot depending on current group membership but is the
1611 best we can do and has the advantage of failing closed rather
1613 ---------------------------------------------------------------------------
1614 Fourth pass - cope with cumulative permissions.
1616 for all allow user entries, if there exists an allow group entry with
1617 more permissive permissions, and the user is in that group, rewrite the
1618 allow user permissions to contain both sets of permissions.
1620 Currently the code for this is #ifdef'ed out as these semantics make
1621 no sense to me. JRA.
1622 ---------------------------------------------------------------------------
1624 Note we *MUST* do the deny user pass first as this will convert deny user
1625 entries into allow user entries which can then be processed by the deny
1628 The above algorithm took a *lot* of thinking about - hence this
1629 explaination :-). JRA.
1630 ****************************************************************************/
1632 /****************************************************************************
1633 Process a canon_ace list entries. This is very complex code. We need
1634 to go through and remove the "deny" permissions from any allow entry that matches
1635 the id of this entry. We have already refused any NT ACL that wasn't in correct
1636 order (DENY followed by ALLOW). If any allow entry ends up with zero permissions,
1637 we just remove it (to fail safe). We have already removed any duplicate ace
1638 entries. Treat an "Everyone" DENY_ACE as a special case - use it to mask all
1640 ****************************************************************************/
1642 static void process_deny_list( canon_ace **pp_ace_list )
1644 canon_ace *ace_list = *pp_ace_list;
1645 canon_ace *curr_ace = NULL;
1646 canon_ace *curr_ace_next = NULL;
1648 /* Pass 1 above - look for an Everyone, deny entry. */
1650 for (curr_ace = ace_list; curr_ace; curr_ace = curr_ace_next) {
1651 canon_ace *allow_ace_p;
1653 curr_ace_next = curr_ace->next; /* So we can't lose the link. */
1655 if (curr_ace->attr != DENY_ACE)
1658 if (curr_ace->perms == (mode_t)0) {
1660 /* Deny nothing entry - delete. */
1662 DLIST_REMOVE(ace_list, curr_ace);
1666 if (!sid_equal(&curr_ace->trustee, &global_sid_World))
1669 /* JRATEST - assert. */
1670 SMB_ASSERT(curr_ace->owner_type == WORLD_ACE);
1672 if (curr_ace->perms == ALL_ACE_PERMS) {
1675 * Optimisation. This is a DENY_ALL to Everyone. Truncate the
1676 * list at this point including this entry.
1679 canon_ace *prev_entry = curr_ace->prev;
1681 free_canon_ace_list( curr_ace );
1683 prev_entry->next = NULL;
1685 /* We deleted the entire list. */
1691 for (allow_ace_p = curr_ace->next; allow_ace_p; allow_ace_p = allow_ace_p->next) {
1694 * Only mask off allow entries.
1697 if (allow_ace_p->attr != ALLOW_ACE)
1700 allow_ace_p->perms &= ~curr_ace->perms;
1704 * Now it's been applied, remove it.
1707 DLIST_REMOVE(ace_list, curr_ace);
1710 /* Pass 2 above - deal with deny user entries. */
1712 for (curr_ace = ace_list; curr_ace; curr_ace = curr_ace_next) {
1713 mode_t new_perms = (mode_t)0;
1714 canon_ace *allow_ace_p;
1717 curr_ace_next = curr_ace->next; /* So we can't lose the link. */
1719 if (curr_ace->attr != DENY_ACE)
1722 if (curr_ace->owner_type != UID_ACE)
1725 if (curr_ace->perms == ALL_ACE_PERMS) {
1728 * Optimisation - this is a deny everything to this user.
1729 * Convert to an allow nothing and push to the end of the list.
1732 curr_ace->attr = ALLOW_ACE;
1733 curr_ace->perms = (mode_t)0;
1734 DLIST_DEMOTE(ace_list, curr_ace, tmp_ace);
1738 for (allow_ace_p = curr_ace->next; allow_ace_p; allow_ace_p = allow_ace_p->next) {
1740 if (allow_ace_p->attr != ALLOW_ACE)
1743 /* We process GID_ACE and WORLD_ACE entries only. */
1745 if (allow_ace_p->owner_type == UID_ACE)
1748 if (uid_entry_in_group( curr_ace, allow_ace_p))
1749 new_perms |= allow_ace_p->perms;
1753 * Convert to a allow entry, modify the perms and push to the end
1757 curr_ace->attr = ALLOW_ACE;
1758 curr_ace->perms = (new_perms & ~curr_ace->perms);
1759 DLIST_DEMOTE(ace_list, curr_ace, tmp_ace);
1762 /* Pass 3 above - deal with deny group entries. */
1764 for (curr_ace = ace_list; curr_ace; curr_ace = curr_ace_next) {
1766 canon_ace *allow_ace_p;
1767 canon_ace *allow_everyone_p = NULL;
1769 curr_ace_next = curr_ace->next; /* So we can't lose the link. */
1771 if (curr_ace->attr != DENY_ACE)
1774 if (curr_ace->owner_type != GID_ACE)
1777 for (allow_ace_p = curr_ace->next; allow_ace_p; allow_ace_p = allow_ace_p->next) {
1779 if (allow_ace_p->attr != ALLOW_ACE)
1782 /* Store a pointer to the Everyone allow, if it exists. */
1783 if (allow_ace_p->owner_type == WORLD_ACE)
1784 allow_everyone_p = allow_ace_p;
1786 /* We process UID_ACE entries only. */
1788 if (allow_ace_p->owner_type != UID_ACE)
1791 /* Mask off the deny group perms. */
1793 if (uid_entry_in_group( allow_ace_p, curr_ace))
1794 allow_ace_p->perms &= ~curr_ace->perms;
1798 * Convert the deny to an allow with the correct perms and
1799 * push to the end of the list.
1802 curr_ace->attr = ALLOW_ACE;
1803 if (allow_everyone_p)
1804 curr_ace->perms = allow_everyone_p->perms & ~curr_ace->perms;
1806 curr_ace->perms = (mode_t)0;
1807 DLIST_DEMOTE(ace_list, curr_ace, tmp_ace);
1811 /* Doing this fourth pass allows Windows semantics to be layered
1812 * on top of POSIX semantics. I'm not sure if this is desirable.
1813 * For example, in W2K ACLs there is no way to say, "Group X no
1814 * access, user Y full access" if user Y is a member of group X.
1815 * This seems completely broken semantics to me.... JRA.
1819 /* Pass 4 above - deal with allow entries. */
1821 for (curr_ace = ace_list; curr_ace; curr_ace = curr_ace_next) {
1822 canon_ace *allow_ace_p;
1824 curr_ace_next = curr_ace->next; /* So we can't lose the link. */
1826 if (curr_ace->attr != ALLOW_ACE)
1829 if (curr_ace->owner_type != UID_ACE)
1832 for (allow_ace_p = ace_list; allow_ace_p; allow_ace_p = allow_ace_p->next) {
1834 if (allow_ace_p->attr != ALLOW_ACE)
1837 /* We process GID_ACE entries only. */
1839 if (allow_ace_p->owner_type != GID_ACE)
1842 /* OR in the group perms. */
1844 if (uid_entry_in_group( curr_ace, allow_ace_p))
1845 curr_ace->perms |= allow_ace_p->perms;
1850 *pp_ace_list = ace_list;
1853 /****************************************************************************
1854 Create a default mode that will be used if a security descriptor entry has
1855 no user/group/world entries.
1856 ****************************************************************************/
1858 static mode_t create_default_mode(files_struct *fsp, BOOL interitable_mode)
1860 int snum = SNUM(fsp->conn);
1861 mode_t and_bits = (mode_t)0;
1862 mode_t or_bits = (mode_t)0;
1863 mode_t mode = interitable_mode ? unix_mode( fsp->conn, FILE_ATTRIBUTE_ARCHIVE, fsp->fsp_name, False) : S_IRUSR;
1865 if (fsp->is_directory)
1866 mode |= (S_IWUSR|S_IXUSR);
1869 * Now AND with the create mode/directory mode bits then OR with the
1870 * force create mode/force directory mode bits.
1873 if (fsp->is_directory) {
1874 and_bits = lp_dir_security_mask(snum);
1875 or_bits = lp_force_dir_security_mode(snum);
1877 and_bits = lp_security_mask(snum);
1878 or_bits = lp_force_security_mode(snum);
1881 return ((mode & and_bits)|or_bits);
1884 /****************************************************************************
1885 Unpack a SEC_DESC into two canonical ace lists. We don't depend on this
1887 ****************************************************************************/
1889 static BOOL unpack_canon_ace(files_struct *fsp,
1890 SMB_STRUCT_STAT *pst,
1891 DOM_SID *pfile_owner_sid,
1892 DOM_SID *pfile_grp_sid,
1893 canon_ace **ppfile_ace, canon_ace **ppdir_ace,
1894 uint32 security_info_sent, SEC_DESC *psd)
1896 canon_ace *file_ace = NULL;
1897 canon_ace *dir_ace = NULL;
1902 if(security_info_sent == 0) {
1903 DEBUG(0,("unpack_canon_ace: no security info sent !\n"));
1908 * If no DACL then this is a chown only security descriptor.
1911 if(!(security_info_sent & DACL_SECURITY_INFORMATION) || !psd->dacl)
1915 * Now go through the DACL and create the canon_ace lists.
1918 if (!create_canon_ace_lists( fsp, pst, pfile_owner_sid, pfile_grp_sid,
1919 &file_ace, &dir_ace, psd->dacl))
1922 if ((file_ace == NULL) && (dir_ace == NULL)) {
1923 /* W2K traverse DACL set - ignore. */
1928 * Go through the canon_ace list and merge entries
1929 * belonging to identical users of identical allow or deny type.
1930 * We can do this as all deny entries come first, followed by
1931 * all allow entries (we have mandated this before accepting this acl).
1934 print_canon_ace_list( "file ace - before merge", file_ace);
1935 merge_aces( &file_ace );
1937 print_canon_ace_list( "dir ace - before merge", dir_ace);
1938 merge_aces( &dir_ace );
1941 * NT ACLs are order dependent. Go through the acl lists and
1942 * process DENY entries by masking the allow entries.
1945 print_canon_ace_list( "file ace - before deny", file_ace);
1946 process_deny_list( &file_ace);
1948 print_canon_ace_list( "dir ace - before deny", dir_ace);
1949 process_deny_list( &dir_ace);
1952 * A well formed POSIX file or default ACL has at least 3 entries, a
1953 * SMB_ACL_USER_OBJ, SMB_ACL_GROUP_OBJ, SMB_ACL_OTHER_OBJ
1954 * and optionally a mask entry. Ensure this is the case.
1957 print_canon_ace_list( "file ace - before valid", file_ace);
1960 * A default 3 element mode entry for a file should be r-- --- ---.
1961 * A default 3 element mode entry for a directory should be rwx --- ---.
1964 pst->st_mode = create_default_mode(fsp, False);
1966 if (!ensure_canon_entry_valid(&file_ace, fsp, pfile_owner_sid, pfile_grp_sid, pst, True)) {
1967 free_canon_ace_list(file_ace);
1968 free_canon_ace_list(dir_ace);
1972 print_canon_ace_list( "dir ace - before valid", dir_ace);
1975 * A default inheritable 3 element mode entry for a directory should be the
1976 * mode Samba will use to create a file within. Ensure user rwx bits are set if
1980 pst->st_mode = create_default_mode(fsp, True);
1982 if (dir_ace && !ensure_canon_entry_valid(&dir_ace, fsp, pfile_owner_sid, pfile_grp_sid, pst, True)) {
1983 free_canon_ace_list(file_ace);
1984 free_canon_ace_list(dir_ace);
1988 print_canon_ace_list( "file ace - return", file_ace);
1989 print_canon_ace_list( "dir ace - return", dir_ace);
1991 *ppfile_ace = file_ace;
1992 *ppdir_ace = dir_ace;
1997 /******************************************************************************
1998 When returning permissions, try and fit NT display
1999 semantics if possible. Note the the canon_entries here must have been malloced.
2000 The list format should be - first entry = owner, followed by group and other user
2001 entries, last entry = other.
2003 Note that this doesn't exactly match the NT semantics for an ACL. As POSIX entries
2004 are not ordered, and match on the most specific entry rather than walking a list,
2005 then a simple POSIX permission of rw-r--r-- should really map to 5 entries,
2007 Entry 0: owner : deny all except read and write.
2008 Entry 1: group : deny all except read.
2009 Entry 2: owner : allow read and write.
2010 Entry 3: group : allow read.
2011 Entry 4: Everyone : allow read.
2013 But NT cannot display this in their ACL editor !
2014 ********************************************************************************/
2016 static void arrange_posix_perms( char *filename, canon_ace **pp_list_head)
2018 canon_ace *list_head = *pp_list_head;
2019 canon_ace *owner_ace = NULL;
2020 canon_ace *other_ace = NULL;
2021 canon_ace *ace = NULL;
2023 for (ace = list_head; ace; ace = ace->next) {
2024 if (ace->type == SMB_ACL_USER_OBJ)
2026 else if (ace->type == SMB_ACL_OTHER) {
2027 /* Last ace - this is "other" */
2032 if (!owner_ace || !other_ace) {
2033 DEBUG(0,("arrange_posix_perms: Invalid POSIX permissions for file %s, missing owner or other.\n",
2039 * The POSIX algorithm applies to owner first, and other last,
2040 * so ensure they are arranged in this order.
2044 DLIST_PROMOTE(list_head, owner_ace);
2048 DLIST_DEMOTE(list_head, other_ace, ace);
2051 /* We have probably changed the head of the list. */
2053 *pp_list_head = list_head;
2056 /****************************************************************************
2057 Create a linked list of canonical ACE entries.
2058 ****************************************************************************/
2060 static canon_ace *canonicalise_acl( files_struct *fsp, SMB_ACL_T posix_acl, SMB_STRUCT_STAT *psbuf,
2061 const DOM_SID *powner, const DOM_SID *pgroup, struct pai_val *pal, SMB_ACL_TYPE_T the_acl_type)
2063 connection_struct *conn = fsp->conn;
2064 mode_t acl_mask = (S_IRUSR|S_IWUSR|S_IXUSR);
2065 canon_ace *list_head = NULL;
2066 canon_ace *ace = NULL;
2067 canon_ace *next_ace = NULL;
2068 int entry_id = SMB_ACL_FIRST_ENTRY;
2069 SMB_ACL_ENTRY_T entry;
2072 while ( posix_acl && (SMB_VFS_SYS_ACL_GET_ENTRY(conn, posix_acl, entry_id, &entry) == 1)) {
2073 SMB_ACL_TAG_T tagtype;
2074 SMB_ACL_PERMSET_T permset;
2077 enum ace_owner owner_type;
2080 if (entry_id == SMB_ACL_FIRST_ENTRY)
2081 entry_id = SMB_ACL_NEXT_ENTRY;
2083 /* Is this a MASK entry ? */
2084 if (SMB_VFS_SYS_ACL_GET_TAG_TYPE(conn, entry, &tagtype) == -1)
2087 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, entry, &permset) == -1)
2090 /* Decide which SID to use based on the ACL type. */
2092 case SMB_ACL_USER_OBJ:
2093 /* Get the SID from the owner. */
2094 sid_copy(&sid, powner);
2095 unix_ug.uid = psbuf->st_uid;
2096 owner_type = UID_ACE;
2100 uid_t *puid = (uid_t *)SMB_VFS_SYS_ACL_GET_QUALIFIER(conn, entry);
2102 DEBUG(0,("canonicalise_acl: Failed to get uid.\n"));
2106 * A SMB_ACL_USER entry for the owner is shadowed by the
2107 * SMB_ACL_USER_OBJ entry and Windows also cannot represent
2108 * that entry, so we ignore it. We also don't create such
2109 * entries out of the blue when setting ACLs, so a get/set
2110 * cycle will drop them.
2112 if (the_acl_type == SMB_ACL_TYPE_ACCESS && *puid == psbuf->st_uid) {
2113 SMB_VFS_SYS_ACL_FREE_QUALIFIER(conn, (void *)puid,tagtype);
2116 uid_to_sid( &sid, *puid);
2117 unix_ug.uid = *puid;
2118 owner_type = UID_ACE;
2119 SMB_VFS_SYS_ACL_FREE_QUALIFIER(conn, (void *)puid,tagtype);
2122 case SMB_ACL_GROUP_OBJ:
2123 /* Get the SID from the owning group. */
2124 sid_copy(&sid, pgroup);
2125 unix_ug.gid = psbuf->st_gid;
2126 owner_type = GID_ACE;
2130 gid_t *pgid = (gid_t *)SMB_VFS_SYS_ACL_GET_QUALIFIER(conn, entry);
2132 DEBUG(0,("canonicalise_acl: Failed to get gid.\n"));
2135 gid_to_sid( &sid, *pgid);
2136 unix_ug.gid = *pgid;
2137 owner_type = GID_ACE;
2138 SMB_VFS_SYS_ACL_FREE_QUALIFIER(conn, (void *)pgid,tagtype);
2142 acl_mask = convert_permset_to_mode_t(conn, permset);
2143 continue; /* Don't count the mask as an entry. */
2145 /* Use the Everyone SID */
2146 sid = global_sid_World;
2148 owner_type = WORLD_ACE;
2151 DEBUG(0,("canonicalise_acl: Unknown tagtype %u\n", (unsigned int)tagtype));
2156 * Add this entry to the list.
2159 if ((ace = SMB_MALLOC_P(canon_ace)) == NULL)
2163 ace->type = tagtype;
2164 ace->perms = convert_permset_to_mode_t(conn, permset);
2165 ace->attr = ALLOW_ACE;
2167 ace->unix_ug = unix_ug;
2168 ace->owner_type = owner_type;
2169 ace->inherited = get_inherited_flag(pal, ace, (the_acl_type == SMB_ACL_TYPE_DEFAULT));
2171 DLIST_ADD(list_head, ace);
2175 * This next call will ensure we have at least a user/group/world set.
2178 if (!ensure_canon_entry_valid(&list_head, fsp, powner, pgroup, psbuf, False))
2182 * Now go through the list, masking the permissions with the
2183 * acl_mask. Ensure all DENY Entries are at the start of the list.
2186 DEBUG(10,("canonicalise_acl: %s ace entries before arrange :\n", the_acl_type == SMB_ACL_TYPE_ACCESS ? "Access" : "Default" ));
2188 for ( ace_count = 0, ace = list_head; ace; ace = next_ace, ace_count++) {
2189 next_ace = ace->next;
2191 /* Masks are only applied to entries other than USER_OBJ and OTHER. */
2192 if (ace->type != SMB_ACL_OTHER && ace->type != SMB_ACL_USER_OBJ)
2193 ace->perms &= acl_mask;
2195 if (ace->perms == 0) {
2196 DLIST_PROMOTE(list_head, ace);
2199 if( DEBUGLVL( 10 ) ) {
2200 print_canon_ace(ace, ace_count);
2204 arrange_posix_perms(fsp->fsp_name,&list_head );
2206 print_canon_ace_list( "canonicalise_acl: ace entries after arrange", list_head );
2212 free_canon_ace_list(list_head);
2216 /****************************************************************************
2217 Attempt to apply an ACL to a file or directory.
2218 ****************************************************************************/
2220 static BOOL set_canon_ace_list(files_struct *fsp, canon_ace *the_ace, BOOL default_ace, BOOL *pacl_set_support)
2222 connection_struct *conn = fsp->conn;
2224 SMB_ACL_T the_acl = SMB_VFS_SYS_ACL_INIT(conn, (int)count_canon_ace_list(the_ace) + 1);
2227 SMB_ACL_ENTRY_T mask_entry;
2228 BOOL got_mask_entry = False;
2229 SMB_ACL_PERMSET_T mask_permset;
2230 SMB_ACL_TYPE_T the_acl_type = (default_ace ? SMB_ACL_TYPE_DEFAULT : SMB_ACL_TYPE_ACCESS);
2231 BOOL needs_mask = False;
2232 mode_t mask_perms = 0;
2234 #if defined(POSIX_ACL_NEEDS_MASK)
2235 /* HP-UX always wants to have a mask (called "class" there). */
2239 if (the_acl == NULL) {
2241 if (!no_acl_syscall_error(errno)) {
2243 * Only print this error message if we have some kind of ACL
2244 * support that's not working. Otherwise we would always get this.
2246 DEBUG(0,("set_canon_ace_list: Unable to init %s ACL. (%s)\n",
2247 default_ace ? "default" : "file", strerror(errno) ));
2249 *pacl_set_support = False;
2253 if( DEBUGLVL( 10 )) {
2254 dbgtext("set_canon_ace_list: setting ACL:\n");
2255 for (i = 0, p_ace = the_ace; p_ace; p_ace = p_ace->next, i++ ) {
2256 print_canon_ace( p_ace, i);
2260 for (i = 0, p_ace = the_ace; p_ace; p_ace = p_ace->next, i++ ) {
2261 SMB_ACL_ENTRY_T the_entry;
2262 SMB_ACL_PERMSET_T the_permset;
2265 * ACLs only "need" an ACL_MASK entry if there are any named user or
2266 * named group entries. But if there is an ACL_MASK entry, it applies
2267 * to ACL_USER, ACL_GROUP, and ACL_GROUP_OBJ entries. Set the mask
2268 * so that it doesn't deny (i.e., mask off) any permissions.
2271 if (p_ace->type == SMB_ACL_USER || p_ace->type == SMB_ACL_GROUP) {
2273 mask_perms |= p_ace->perms;
2274 } else if (p_ace->type == SMB_ACL_GROUP_OBJ) {
2275 mask_perms |= p_ace->perms;
2279 * Get the entry for this ACE.
2282 if (SMB_VFS_SYS_ACL_CREATE_ENTRY(conn, &the_acl, &the_entry) == -1) {
2283 DEBUG(0,("set_canon_ace_list: Failed to create entry %d. (%s)\n",
2284 i, strerror(errno) ));
2288 if (p_ace->type == SMB_ACL_MASK) {
2289 mask_entry = the_entry;
2290 got_mask_entry = True;
2294 * Ok - we now know the ACL calls should be working, don't
2295 * allow fallback to chmod.
2298 *pacl_set_support = True;
2301 * Initialise the entry from the canon_ace.
2305 * First tell the entry what type of ACE this is.
2308 if (SMB_VFS_SYS_ACL_SET_TAG_TYPE(conn, the_entry, p_ace->type) == -1) {
2309 DEBUG(0,("set_canon_ace_list: Failed to set tag type on entry %d. (%s)\n",
2310 i, strerror(errno) ));
2315 * Only set the qualifier (user or group id) if the entry is a user
2319 if ((p_ace->type == SMB_ACL_USER) || (p_ace->type == SMB_ACL_GROUP)) {
2320 if (SMB_VFS_SYS_ACL_SET_QUALIFIER(conn, the_entry,(void *)&p_ace->unix_ug.uid) == -1) {
2321 DEBUG(0,("set_canon_ace_list: Failed to set qualifier on entry %d. (%s)\n",
2322 i, strerror(errno) ));
2328 * Convert the mode_t perms in the canon_ace to a POSIX permset.
2331 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, the_entry, &the_permset) == -1) {
2332 DEBUG(0,("set_canon_ace_list: Failed to get permset on entry %d. (%s)\n",
2333 i, strerror(errno) ));
2337 if (map_acl_perms_to_permset(conn, p_ace->perms, &the_permset) == -1) {
2338 DEBUG(0,("set_canon_ace_list: Failed to create permset for mode (%u) on entry %d. (%s)\n",
2339 (unsigned int)p_ace->perms, i, strerror(errno) ));
2344 * ..and apply them to the entry.
2347 if (SMB_VFS_SYS_ACL_SET_PERMSET(conn, the_entry, the_permset) == -1) {
2348 DEBUG(0,("set_canon_ace_list: Failed to add permset on entry %d. (%s)\n",
2349 i, strerror(errno) ));
2354 print_canon_ace( p_ace, i);
2358 if (needs_mask && !got_mask_entry) {
2359 if (SMB_VFS_SYS_ACL_CREATE_ENTRY(conn, &the_acl, &mask_entry) == -1) {
2360 DEBUG(0,("set_canon_ace_list: Failed to create mask entry. (%s)\n", strerror(errno) ));
2364 if (SMB_VFS_SYS_ACL_SET_TAG_TYPE(conn, mask_entry, SMB_ACL_MASK) == -1) {
2365 DEBUG(0,("set_canon_ace_list: Failed to set tag type on mask entry. (%s)\n",strerror(errno) ));
2369 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, mask_entry, &mask_permset) == -1) {
2370 DEBUG(0,("set_canon_ace_list: Failed to get mask permset. (%s)\n", strerror(errno) ));
2374 if (map_acl_perms_to_permset(conn, S_IRUSR|S_IWUSR|S_IXUSR, &mask_permset) == -1) {
2375 DEBUG(0,("set_canon_ace_list: Failed to create mask permset. (%s)\n", strerror(errno) ));
2379 if (SMB_VFS_SYS_ACL_SET_PERMSET(conn, mask_entry, mask_permset) == -1) {
2380 DEBUG(0,("set_canon_ace_list: Failed to add mask permset. (%s)\n", strerror(errno) ));
2386 * Check if the ACL is valid.
2389 if (SMB_VFS_SYS_ACL_VALID(conn, the_acl) == -1) {
2390 DEBUG(0,("set_canon_ace_list: ACL type (%s) is invalid for set (%s).\n",
2391 the_acl_type == SMB_ACL_TYPE_DEFAULT ? "directory default" : "file",
2397 * Finally apply it to the file or directory.
2400 if(default_ace || fsp->is_directory || fsp->fd == -1) {
2401 if (SMB_VFS_SYS_ACL_SET_FILE(conn, fsp->fsp_name, the_acl_type, the_acl) == -1) {
2403 * Some systems allow all the above calls and only fail with no ACL support
2404 * when attempting to apply the acl. HPUX with HFS is an example of this. JRA.
2406 if (no_acl_syscall_error(errno)) {
2407 *pacl_set_support = False;
2410 DEBUG(2,("set_canon_ace_list: sys_acl_set_file type %s failed for file %s (%s).\n",
2411 the_acl_type == SMB_ACL_TYPE_DEFAULT ? "directory default" : "file",
2412 fsp->fsp_name, strerror(errno) ));
2416 if (SMB_VFS_SYS_ACL_SET_FD(fsp, fsp->fd, the_acl) == -1) {
2418 * Some systems allow all the above calls and only fail with no ACL support
2419 * when attempting to apply the acl. HPUX with HFS is an example of this. JRA.
2421 if (no_acl_syscall_error(errno)) {
2422 *pacl_set_support = False;
2425 DEBUG(2,("set_canon_ace_list: sys_acl_set_file failed for file %s (%s).\n",
2426 fsp->fsp_name, strerror(errno) ));
2435 if (the_acl != NULL)
2436 SMB_VFS_SYS_ACL_FREE_ACL(conn, the_acl);
2441 /****************************************************************************
2442 Find a particular canon_ace entry.
2443 ****************************************************************************/
2445 static struct canon_ace *canon_ace_entry_for(struct canon_ace *list, SMB_ACL_TAG_T type, posix_id *id)
2448 if (list->type == type && ((type != SMB_ACL_USER && type != SMB_ACL_GROUP) ||
2449 (type == SMB_ACL_USER && id && id->uid == list->unix_ug.uid) ||
2450 (type == SMB_ACL_GROUP && id && id->gid == list->unix_ug.gid)))
2457 /****************************************************************************
2459 ****************************************************************************/
2461 SMB_ACL_T free_empty_sys_acl(connection_struct *conn, SMB_ACL_T the_acl)
2463 SMB_ACL_ENTRY_T entry;
2467 if (SMB_VFS_SYS_ACL_GET_ENTRY(conn, the_acl, SMB_ACL_FIRST_ENTRY, &entry) != 1) {
2468 SMB_VFS_SYS_ACL_FREE_ACL(conn, the_acl);
2474 /****************************************************************************
2475 Convert a canon_ace to a generic 3 element permission - if possible.
2476 ****************************************************************************/
2478 #define MAP_PERM(p,mask,result) (((p) & (mask)) ? (result) : 0 )
2480 static BOOL convert_canon_ace_to_posix_perms( files_struct *fsp, canon_ace *file_ace_list, mode_t *posix_perms)
2482 int snum = SNUM(fsp->conn);
2483 size_t ace_count = count_canon_ace_list(file_ace_list);
2485 canon_ace *owner_ace = NULL;
2486 canon_ace *group_ace = NULL;
2487 canon_ace *other_ace = NULL;
2491 if (ace_count != 3) {
2492 DEBUG(3,("convert_canon_ace_to_posix_perms: Too many ACE entries for file %s to convert to \
2493 posix perms.\n", fsp->fsp_name ));
2497 for (ace_p = file_ace_list; ace_p; ace_p = ace_p->next) {
2498 if (ace_p->owner_type == UID_ACE)
2500 else if (ace_p->owner_type == GID_ACE)
2502 else if (ace_p->owner_type == WORLD_ACE)
2506 if (!owner_ace || !group_ace || !other_ace) {
2507 DEBUG(3,("convert_canon_ace_to_posix_perms: Can't get standard entries for file %s.\n",
2512 *posix_perms = (mode_t)0;
2514 *posix_perms |= owner_ace->perms;
2515 *posix_perms |= MAP_PERM(group_ace->perms, S_IRUSR, S_IRGRP);
2516 *posix_perms |= MAP_PERM(group_ace->perms, S_IWUSR, S_IWGRP);
2517 *posix_perms |= MAP_PERM(group_ace->perms, S_IXUSR, S_IXGRP);
2518 *posix_perms |= MAP_PERM(other_ace->perms, S_IRUSR, S_IROTH);
2519 *posix_perms |= MAP_PERM(other_ace->perms, S_IWUSR, S_IWOTH);
2520 *posix_perms |= MAP_PERM(other_ace->perms, S_IXUSR, S_IXOTH);
2522 /* The owner must have at least read access. */
2524 *posix_perms |= S_IRUSR;
2525 if (fsp->is_directory)
2526 *posix_perms |= (S_IWUSR|S_IXUSR);
2528 /* If requested apply the masks. */
2530 /* Get the initial bits to apply. */
2532 if (fsp->is_directory) {
2533 and_bits = lp_dir_security_mask(snum);
2534 or_bits = lp_force_dir_security_mode(snum);
2536 and_bits = lp_security_mask(snum);
2537 or_bits = lp_force_security_mode(snum);
2540 *posix_perms = (((*posix_perms) & and_bits)|or_bits);
2542 DEBUG(10,("convert_canon_ace_to_posix_perms: converted u=%o,g=%o,w=%o to perm=0%o for file %s.\n",
2543 (int)owner_ace->perms, (int)group_ace->perms, (int)other_ace->perms, (int)*posix_perms,
2549 /****************************************************************************
2550 Incoming NT ACLs on a directory can be split into a default POSIX acl (CI|OI|IO) and
2551 a normal POSIX acl. Win2k needs these split acls re-merging into one ACL
2552 with CI|OI set so it is inherited and also applies to the directory.
2553 Based on code from "Jim McDonough" <jmcd@us.ibm.com>.
2554 ****************************************************************************/
2556 static size_t merge_default_aces( SEC_ACE *nt_ace_list, size_t num_aces)
2560 for (i = 0; i < num_aces; i++) {
2561 for (j = i+1; j < num_aces; j++) {
2562 uint32 i_flags_ni = (nt_ace_list[i].flags & ~SEC_ACE_FLAG_INHERITED_ACE);
2563 uint32 j_flags_ni = (nt_ace_list[j].flags & ~SEC_ACE_FLAG_INHERITED_ACE);
2564 BOOL i_inh = (nt_ace_list[i].flags & SEC_ACE_FLAG_INHERITED_ACE) ? True : False;
2565 BOOL j_inh = (nt_ace_list[j].flags & SEC_ACE_FLAG_INHERITED_ACE) ? True : False;
2567 /* We know the lower number ACE's are file entries. */
2568 if ((nt_ace_list[i].type == nt_ace_list[j].type) &&
2569 (nt_ace_list[i].size == nt_ace_list[j].size) &&
2570 (nt_ace_list[i].info.mask == nt_ace_list[j].info.mask) &&
2571 sid_equal(&nt_ace_list[i].trustee, &nt_ace_list[j].trustee) &&
2573 (i_flags_ni == 0) &&
2574 (j_flags_ni == (SEC_ACE_FLAG_OBJECT_INHERIT|
2575 SEC_ACE_FLAG_CONTAINER_INHERIT|
2576 SEC_ACE_FLAG_INHERIT_ONLY))) {
2578 * W2K wants to have access allowed zero access ACE's
2579 * at the end of the list. If the mask is zero, merge
2580 * the non-inherited ACE onto the inherited ACE.
2583 if (nt_ace_list[i].info.mask == 0) {
2584 nt_ace_list[j].flags = SEC_ACE_FLAG_OBJECT_INHERIT|SEC_ACE_FLAG_CONTAINER_INHERIT|
2585 (i_inh ? SEC_ACE_FLAG_INHERITED_ACE : 0);
2586 if (num_aces - i - 1 > 0)
2587 memmove(&nt_ace_list[i], &nt_ace_list[i+1], (num_aces-i-1) *
2590 DEBUG(10,("merge_default_aces: Merging zero access ACE %u onto ACE %u.\n",
2591 (unsigned int)i, (unsigned int)j ));
2594 * These are identical except for the flags.
2595 * Merge the inherited ACE onto the non-inherited ACE.
2598 nt_ace_list[i].flags = SEC_ACE_FLAG_OBJECT_INHERIT|SEC_ACE_FLAG_CONTAINER_INHERIT|
2599 (i_inh ? SEC_ACE_FLAG_INHERITED_ACE : 0);
2600 if (num_aces - j - 1 > 0)
2601 memmove(&nt_ace_list[j], &nt_ace_list[j+1], (num_aces-j-1) *
2604 DEBUG(10,("merge_default_aces: Merging ACE %u onto ACE %u.\n",
2605 (unsigned int)j, (unsigned int)i ));
2615 /****************************************************************************
2616 Reply to query a security descriptor from an fsp. If it succeeds it allocates
2617 the space for the return elements and returns the size needed to return the
2618 security descriptor. This should be the only external function needed for
2619 the UNIX style get ACL.
2620 ****************************************************************************/
2622 size_t get_nt_acl(files_struct *fsp, uint32 security_info, SEC_DESC **ppdesc)
2624 connection_struct *conn = fsp->conn;
2625 SMB_STRUCT_STAT sbuf;
2626 SEC_ACE *nt_ace_list = NULL;
2630 SEC_ACL *psa = NULL;
2631 size_t num_acls = 0;
2632 size_t num_def_acls = 0;
2633 size_t num_aces = 0;
2634 SMB_ACL_T posix_acl = NULL;
2635 SMB_ACL_T def_acl = NULL;
2636 canon_ace *file_ace = NULL;
2637 canon_ace *dir_ace = NULL;
2638 size_t num_profile_acls = 0;
2639 struct pai_val *pal = NULL;
2640 SEC_DESC *psd = NULL;
2644 DEBUG(10,("get_nt_acl: called for file %s\n", fsp->fsp_name ));
2646 if(fsp->is_directory || fsp->fd == -1) {
2648 /* Get the stat struct for the owner info. */
2649 if(SMB_VFS_STAT(fsp->conn,fsp->fsp_name, &sbuf) != 0) {
2653 * Get the ACL from the path.
2656 posix_acl = SMB_VFS_SYS_ACL_GET_FILE(conn, fsp->fsp_name, SMB_ACL_TYPE_ACCESS);
2659 * If it's a directory get the default POSIX ACL.
2662 if(fsp->is_directory) {
2663 def_acl = SMB_VFS_SYS_ACL_GET_FILE(conn, fsp->fsp_name, SMB_ACL_TYPE_DEFAULT);
2664 def_acl = free_empty_sys_acl(conn, def_acl);
2669 /* Get the stat struct for the owner info. */
2670 if(SMB_VFS_FSTAT(fsp,fsp->fd,&sbuf) != 0) {
2674 * Get the ACL from the fd.
2676 posix_acl = SMB_VFS_SYS_ACL_GET_FD(fsp, fsp->fd);
2679 DEBUG(5,("get_nt_acl : file ACL %s, directory ACL %s\n",
2680 posix_acl ? "present" : "absent",
2681 def_acl ? "present" : "absent" ));
2683 pal = load_inherited_info(fsp);
2686 * Get the owner, group and world SIDs.
2689 if (lp_profile_acls(SNUM(fsp->conn))) {
2690 /* For WXP SP1 the owner must be administrators. */
2691 sid_copy(&owner_sid, &global_sid_Builtin_Administrators);
2692 sid_copy(&group_sid, &global_sid_Builtin_Users);
2693 num_profile_acls = 2;
2695 create_file_sids(&sbuf, &owner_sid, &group_sid);
2698 if ((security_info & DACL_SECURITY_INFORMATION) && !(security_info & PROTECTED_DACL_SECURITY_INFORMATION)) {
2701 * In the optimum case Creator Owner and Creator Group would be used for
2702 * the ACL_USER_OBJ and ACL_GROUP_OBJ entries, respectively, but this
2703 * would lead to usability problems under Windows: The Creator entries
2704 * are only available in browse lists of directories and not for files;
2705 * additionally the identity of the owning group couldn't be determined.
2706 * We therefore use those identities only for Default ACLs.
2709 /* Create the canon_ace lists. */
2710 file_ace = canonicalise_acl( fsp, posix_acl, &sbuf, &owner_sid, &group_sid, pal, SMB_ACL_TYPE_ACCESS );
2712 /* We must have *some* ACLS. */
2714 if (count_canon_ace_list(file_ace) == 0) {
2715 DEBUG(0,("get_nt_acl : No ACLs on file (%s) !\n", fsp->fsp_name ));
2719 if (fsp->is_directory && def_acl) {
2720 dir_ace = canonicalise_acl(fsp, def_acl, &sbuf,
2721 &global_sid_Creator_Owner,
2722 &global_sid_Creator_Group, pal, SMB_ACL_TYPE_DEFAULT );
2726 * Create the NT ACE list from the canonical ace lists.
2734 if (nt4_compatible_acls() && dir_ace) {
2736 * NT 4 chokes if an ACL contains an INHERIT_ONLY entry
2737 * but no non-INHERIT_ONLY entry for one SID. So we only
2738 * remove entries from the Access ACL if the
2739 * corresponding Default ACL entries have also been
2740 * removed. ACEs for CREATOR-OWNER and CREATOR-GROUP
2741 * are exceptions. We can do nothing
2742 * intelligent if the Default ACL contains entries that
2743 * are not also contained in the Access ACL, so this
2744 * case will still fail under NT 4.
2747 ace = canon_ace_entry_for(dir_ace, SMB_ACL_OTHER, NULL);
2748 if (ace && !ace->perms) {
2749 DLIST_REMOVE(dir_ace, ace);
2752 ace = canon_ace_entry_for(file_ace, SMB_ACL_OTHER, NULL);
2753 if (ace && !ace->perms) {
2754 DLIST_REMOVE(file_ace, ace);
2760 * WinNT doesn't usually have Creator Group
2761 * in browse lists, so we send this entry to
2762 * WinNT even if it contains no relevant
2763 * permissions. Once we can add
2764 * Creator Group to browse lists we can
2769 ace = canon_ace_entry_for(dir_ace, SMB_ACL_GROUP_OBJ, NULL);
2770 if (ace && !ace->perms) {
2771 DLIST_REMOVE(dir_ace, ace);
2776 ace = canon_ace_entry_for(file_ace, SMB_ACL_GROUP_OBJ, NULL);
2777 if (ace && !ace->perms) {
2778 DLIST_REMOVE(file_ace, ace);
2783 num_acls = count_canon_ace_list(file_ace);
2784 num_def_acls = count_canon_ace_list(dir_ace);
2786 /* Allocate the ace list. */
2787 if ((nt_ace_list = SMB_MALLOC_ARRAY(SEC_ACE,num_acls + num_profile_acls + num_def_acls)) == NULL) {
2788 DEBUG(0,("get_nt_acl: Unable to malloc space for nt_ace_list.\n"));
2792 memset(nt_ace_list, '\0', (num_acls + num_def_acls) * sizeof(SEC_ACE) );
2795 * Create the NT ACE list from the canonical ace lists.
2800 for (i = 0; i < num_acls; i++, ace = ace->next) {
2803 acc = map_canon_ace_perms(&nt_acl_type, &owner_sid, ace );
2804 init_sec_ace(&nt_ace_list[num_aces++], &ace->trustee, nt_acl_type, acc, ace->inherited ? SEC_ACE_FLAG_INHERITED_ACE : 0);
2807 /* The User must have access to a profile share - even if we can't map the SID. */
2808 if (lp_profile_acls(SNUM(fsp->conn))) {
2811 init_sec_access(&acc,FILE_GENERIC_ALL);
2812 init_sec_ace(&nt_ace_list[num_aces++], &global_sid_Builtin_Users, SEC_ACE_TYPE_ACCESS_ALLOWED,
2818 for (i = 0; i < num_def_acls; i++, ace = ace->next) {
2821 acc = map_canon_ace_perms(&nt_acl_type, &owner_sid, ace );
2822 init_sec_ace(&nt_ace_list[num_aces++], &ace->trustee, nt_acl_type, acc,
2823 SEC_ACE_FLAG_OBJECT_INHERIT|SEC_ACE_FLAG_CONTAINER_INHERIT|
2824 SEC_ACE_FLAG_INHERIT_ONLY|
2825 (ace->inherited ? SEC_ACE_FLAG_INHERITED_ACE : 0));
2828 /* The User must have access to a profile share - even if we can't map the SID. */
2829 if (lp_profile_acls(SNUM(fsp->conn))) {
2832 init_sec_access(&acc,FILE_GENERIC_ALL);
2833 init_sec_ace(&nt_ace_list[num_aces++], &global_sid_Builtin_Users, SEC_ACE_TYPE_ACCESS_ALLOWED, acc,
2834 SEC_ACE_FLAG_OBJECT_INHERIT|SEC_ACE_FLAG_CONTAINER_INHERIT|
2835 SEC_ACE_FLAG_INHERIT_ONLY|0);
2839 * Merge POSIX default ACLs and normal ACLs into one NT ACE.
2840 * Win2K needs this to get the inheritance correct when replacing ACLs
2841 * on a directory tree. Based on work by Jim @ IBM.
2844 num_aces = merge_default_aces(nt_ace_list, num_aces);
2849 if((psa = make_sec_acl( main_loop_talloc_get(), NT4_ACL_REVISION, num_aces, nt_ace_list)) == NULL) {
2850 DEBUG(0,("get_nt_acl: Unable to malloc space for acl.\n"));
2854 } /* security_info & DACL_SECURITY_INFORMATION */
2856 psd = make_standard_sec_desc( main_loop_talloc_get(),
2857 (security_info & OWNER_SECURITY_INFORMATION) ? &owner_sid : NULL,
2858 (security_info & GROUP_SECURITY_INFORMATION) ? &group_sid : NULL,
2863 DEBUG(0,("get_nt_acl: Unable to malloc space for security descriptor.\n"));
2867 * Windows 2000: The DACL_PROTECTED flag in the security
2868 * descriptor marks the ACL as non-inheriting, i.e., no
2869 * ACEs from higher level directories propagate to this
2870 * ACL. In the POSIX ACL model permissions are only
2871 * inherited at file create time, so ACLs never contain
2872 * any ACEs that are inherited dynamically. The DACL_PROTECTED
2873 * flag doesn't seem to bother Windows NT.
2874 * Always set this if map acl inherit is turned off.
2876 if (get_protected_flag(pal) || !lp_map_acl_inherit(SNUM(conn))) {
2877 psd->type |= SE_DESC_DACL_PROTECTED;
2882 dacl_sort_into_canonical_order(psd->dacl->ace, (unsigned int)psd->dacl->num_aces);
2889 SMB_VFS_SYS_ACL_FREE_ACL(conn, posix_acl);
2891 SMB_VFS_SYS_ACL_FREE_ACL(conn, def_acl);
2892 free_canon_ace_list(file_ace);
2893 free_canon_ace_list(dir_ace);
2894 free_inherited_info(pal);
2895 SAFE_FREE(nt_ace_list);
2900 /****************************************************************************
2901 Try to chown a file. We will be able to chown it under the following conditions.
2903 1) If we have root privileges, then it will just work.
2904 2) If we have write permission to the file and dos_filemodes is set
2905 then allow chown to the currently authenticated user.
2906 ****************************************************************************/
2908 static int try_chown(connection_struct *conn, const char *fname, uid_t uid, gid_t gid)
2914 /* try the direct way first */
2915 ret = SMB_VFS_CHOWN(conn, fname, uid, gid);
2919 if(!CAN_WRITE(conn) || !lp_dos_filemode(SNUM(conn)))
2922 if (SMB_VFS_STAT(conn,fname,&st))
2925 fsp = open_file_fchmod(conn,fname,&st);
2929 /* only allow chown to the current user. This is more secure,
2930 and also copes with the case where the SID in a take ownership ACL is
2931 a local SID on the users workstation
2933 uid = current_user.uid;
2936 /* Keep the current file gid the same. */
2937 ret = SMB_VFS_FCHOWN(fsp, fsp->fd, uid, (gid_t)-1);
2940 close_file_fchmod(fsp);
2945 /****************************************************************************
2946 Reply to set a security descriptor on an fsp. security_info_sent is the
2947 description of the following NT ACL.
2948 This should be the only external function needed for the UNIX style set ACL.
2949 ****************************************************************************/
2951 BOOL set_nt_acl(files_struct *fsp, uint32 security_info_sent, SEC_DESC *psd)
2953 connection_struct *conn = fsp->conn;
2954 uid_t user = (uid_t)-1;
2955 gid_t grp = (gid_t)-1;
2956 SMB_STRUCT_STAT sbuf;
2957 DOM_SID file_owner_sid;
2958 DOM_SID file_grp_sid;
2959 canon_ace *file_ace_list = NULL;
2960 canon_ace *dir_ace_list = NULL;
2961 BOOL acl_perms = False;
2962 mode_t orig_mode = (mode_t)0;
2965 BOOL need_chown = False;
2967 DEBUG(10,("set_nt_acl: called for file %s\n", fsp->fsp_name ));
2969 if (!CAN_WRITE(conn)) {
2970 DEBUG(10,("set acl rejected on read-only share\n"));
2975 * Get the current state of the file.
2978 if(fsp->is_directory || fsp->fd == -1) {
2979 if(SMB_VFS_STAT(fsp->conn,fsp->fsp_name, &sbuf) != 0)
2982 if(SMB_VFS_FSTAT(fsp,fsp->fd,&sbuf) != 0)
2986 /* Save the original elements we check against. */
2987 orig_mode = sbuf.st_mode;
2988 orig_uid = sbuf.st_uid;
2989 orig_gid = sbuf.st_gid;
2992 * Unpack the user/group/world id's.
2995 if (!unpack_nt_owners( SNUM(conn), &sbuf, &user, &grp, security_info_sent, psd))
2999 * Do we need to chown ?
3002 if (((user != (uid_t)-1) && (orig_uid != user)) || (( grp != (gid_t)-1) && (orig_gid != grp)))
3006 * Chown before setting ACL only if we don't change the user, or
3007 * if we change to the current user, but not if we want to give away
3011 if (need_chown && (user == (uid_t)-1 || user == current_user.uid)) {
3013 DEBUG(3,("set_nt_acl: chown %s. uid = %u, gid = %u.\n",
3014 fsp->fsp_name, (unsigned int)user, (unsigned int)grp ));
3016 if(try_chown( fsp->conn, fsp->fsp_name, user, grp) == -1) {
3017 DEBUG(3,("set_nt_acl: chown %s, %u, %u failed. Error = %s.\n",
3018 fsp->fsp_name, (unsigned int)user, (unsigned int)grp, strerror(errno) ));
3023 * Recheck the current state of the file, which may have changed.
3024 * (suid/sgid bits, for instance)
3027 if(fsp->is_directory) {
3028 if(SMB_VFS_STAT(fsp->conn, fsp->fsp_name, &sbuf) != 0) {
3036 ret = SMB_VFS_STAT(fsp->conn, fsp->fsp_name, &sbuf);
3038 ret = SMB_VFS_FSTAT(fsp,fsp->fd,&sbuf);
3044 /* Save the original elements we check against. */
3045 orig_mode = sbuf.st_mode;
3046 orig_uid = sbuf.st_uid;
3047 orig_gid = sbuf.st_gid;
3049 /* We did it, don't try again */
3053 create_file_sids(&sbuf, &file_owner_sid, &file_grp_sid);
3055 acl_perms = unpack_canon_ace( fsp, &sbuf, &file_owner_sid, &file_grp_sid,
3056 &file_ace_list, &dir_ace_list, security_info_sent, psd);
3058 /* Ignore W2K traverse DACL set. */
3059 if (file_ace_list || dir_ace_list) {
3062 DEBUG(3,("set_nt_acl: cannot set permissions\n"));
3063 free_canon_ace_list(file_ace_list);
3064 free_canon_ace_list(dir_ace_list);
3069 * Only change security if we got a DACL.
3072 if((security_info_sent & DACL_SECURITY_INFORMATION) && (psd->dacl != NULL)) {
3074 BOOL acl_set_support = False;
3078 * Try using the POSIX ACL set first. Fall back to chmod if
3079 * we have no ACL support on this filesystem.
3082 if (acl_perms && file_ace_list) {
3083 ret = set_canon_ace_list(fsp, file_ace_list, False, &acl_set_support);
3084 if (acl_set_support && ret == False) {
3085 DEBUG(3,("set_nt_acl: failed to set file acl on file %s (%s).\n", fsp->fsp_name, strerror(errno) ));
3086 free_canon_ace_list(file_ace_list);
3087 free_canon_ace_list(dir_ace_list);
3092 if (acl_perms && acl_set_support && fsp->is_directory) {
3094 if (!set_canon_ace_list(fsp, dir_ace_list, True, &acl_set_support)) {
3095 DEBUG(3,("set_nt_acl: failed to set default acl on directory %s (%s).\n", fsp->fsp_name, strerror(errno) ));
3096 free_canon_ace_list(file_ace_list);
3097 free_canon_ace_list(dir_ace_list);
3103 * No default ACL - delete one if it exists.
3106 if (SMB_VFS_SYS_ACL_DELETE_DEF_FILE(conn, fsp->fsp_name) == -1) {
3107 DEBUG(3,("set_nt_acl: sys_acl_delete_def_file failed (%s)\n", strerror(errno)));
3108 free_canon_ace_list(file_ace_list);
3109 free_canon_ace_list(dir_ace_list);
3115 if (acl_set_support)
3116 store_inheritance_attributes(fsp, file_ace_list, dir_ace_list,
3117 (psd->type & SE_DESC_DACL_PROTECTED) ? True : False);
3120 * If we cannot set using POSIX ACLs we fall back to checking if we need to chmod.
3123 if(!acl_set_support && acl_perms) {
3126 if (!convert_canon_ace_to_posix_perms( fsp, file_ace_list, &posix_perms)) {
3127 free_canon_ace_list(file_ace_list);
3128 free_canon_ace_list(dir_ace_list);
3129 DEBUG(3,("set_nt_acl: failed to convert file acl to posix permissions for file %s.\n",
3134 if (orig_mode != posix_perms) {
3136 DEBUG(3,("set_nt_acl: chmod %s. perms = 0%o.\n",
3137 fsp->fsp_name, (unsigned int)posix_perms ));
3139 if(SMB_VFS_CHMOD(conn,fsp->fsp_name, posix_perms) == -1) {
3140 DEBUG(3,("set_nt_acl: chmod %s, 0%o failed. Error = %s.\n",
3141 fsp->fsp_name, (unsigned int)posix_perms, strerror(errno) ));
3142 free_canon_ace_list(file_ace_list);
3143 free_canon_ace_list(dir_ace_list);
3150 free_canon_ace_list(file_ace_list);
3151 free_canon_ace_list(dir_ace_list);
3154 /* Any chown pending? */
3157 DEBUG(3,("set_nt_acl: chown %s. uid = %u, gid = %u.\n",
3158 fsp->fsp_name, (unsigned int)user, (unsigned int)grp ));
3160 if(try_chown( fsp->conn, fsp->fsp_name, user, grp) == -1) {
3161 DEBUG(3,("set_nt_acl: chown %s, %u, %u failed. Error = %s.\n",
3162 fsp->fsp_name, (unsigned int)user, (unsigned int)grp, strerror(errno) ));
3170 /****************************************************************************
3171 Get the actual group bits stored on a file with an ACL. Has no effect if
3172 the file has no ACL. Needed in dosmode code where the stat() will return
3173 the mask bits, not the real group bits, for a file with an ACL.
3174 ****************************************************************************/
3176 int get_acl_group_bits( connection_struct *conn, const char *fname, mode_t *mode )
3178 int entry_id = SMB_ACL_FIRST_ENTRY;
3179 SMB_ACL_ENTRY_T entry;
3180 SMB_ACL_T posix_acl;
3183 posix_acl = SMB_VFS_SYS_ACL_GET_FILE(conn, fname, SMB_ACL_TYPE_ACCESS);
3184 if (posix_acl == (SMB_ACL_T)NULL)
3187 while (SMB_VFS_SYS_ACL_GET_ENTRY(conn, posix_acl, entry_id, &entry) == 1) {
3188 SMB_ACL_TAG_T tagtype;
3189 SMB_ACL_PERMSET_T permset;
3192 if (entry_id == SMB_ACL_FIRST_ENTRY)
3193 entry_id = SMB_ACL_NEXT_ENTRY;
3195 if (SMB_VFS_SYS_ACL_GET_TAG_TYPE(conn, entry, &tagtype) ==-1)
3198 if (tagtype == SMB_ACL_GROUP_OBJ) {
3199 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, entry, &permset) == -1) {
3202 *mode &= ~(S_IRGRP|S_IWGRP|S_IXGRP);
3203 *mode |= (SMB_VFS_SYS_ACL_GET_PERM(conn, permset, SMB_ACL_READ) ? S_IRGRP : 0);
3204 *mode |= (SMB_VFS_SYS_ACL_GET_PERM(conn, permset, SMB_ACL_WRITE) ? S_IWGRP : 0);
3205 *mode |= (SMB_VFS_SYS_ACL_GET_PERM(conn, permset, SMB_ACL_EXECUTE) ? S_IXGRP : 0);
3211 SMB_VFS_SYS_ACL_FREE_ACL(conn, posix_acl);
3215 /****************************************************************************
3216 Do a chmod by setting the ACL USER_OBJ, GROUP_OBJ and OTHER bits in an ACL
3217 and set the mask to rwx. Needed to preserve complex ACLs set by NT.
3218 ****************************************************************************/
3220 static int chmod_acl_internals( connection_struct *conn, SMB_ACL_T posix_acl, mode_t mode)
3222 int entry_id = SMB_ACL_FIRST_ENTRY;
3223 SMB_ACL_ENTRY_T entry;
3224 int num_entries = 0;
3226 while ( SMB_VFS_SYS_ACL_GET_ENTRY(conn, posix_acl, entry_id, &entry) == 1) {
3227 SMB_ACL_TAG_T tagtype;
3228 SMB_ACL_PERMSET_T permset;
3232 if (entry_id == SMB_ACL_FIRST_ENTRY)
3233 entry_id = SMB_ACL_NEXT_ENTRY;
3235 if (SMB_VFS_SYS_ACL_GET_TAG_TYPE(conn, entry, &tagtype) == -1)
3238 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, entry, &permset) == -1)
3244 case SMB_ACL_USER_OBJ:
3245 perms = unix_perms_to_acl_perms(mode, S_IRUSR, S_IWUSR, S_IXUSR);
3247 case SMB_ACL_GROUP_OBJ:
3248 perms = unix_perms_to_acl_perms(mode, S_IRGRP, S_IWGRP, S_IXGRP);
3252 * FIXME: The ACL_MASK entry permissions should really be set to
3253 * the union of the permissions of all ACL_USER,
3254 * ACL_GROUP_OBJ, and ACL_GROUP entries. That's what
3255 * acl_calc_mask() does, but Samba ACLs doesn't provide it.
3257 perms = S_IRUSR|S_IWUSR|S_IXUSR;
3260 perms = unix_perms_to_acl_perms(mode, S_IROTH, S_IWOTH, S_IXOTH);
3266 if (map_acl_perms_to_permset(conn, perms, &permset) == -1)
3269 if (SMB_VFS_SYS_ACL_SET_PERMSET(conn, entry, permset) == -1)
3274 * If this is a simple 3 element ACL or no elements then it's a standard
3275 * UNIX permission set. Just use chmod...
3278 if ((num_entries == 3) || (num_entries == 0))
3284 /****************************************************************************
3285 Get the access ACL of FROM, do a chmod by setting the ACL USER_OBJ,
3286 GROUP_OBJ and OTHER bits in an ACL and set the mask to rwx. Set the
3287 resulting ACL on TO. Note that name is in UNIX character set.
3288 ****************************************************************************/
3290 static int copy_access_acl(connection_struct *conn, const char *from, const char *to, mode_t mode)
3292 SMB_ACL_T posix_acl = NULL;
3295 if ((posix_acl = SMB_VFS_SYS_ACL_GET_FILE(conn, from, SMB_ACL_TYPE_ACCESS)) == NULL)
3298 if ((ret = chmod_acl_internals(conn, posix_acl, mode)) == -1)
3301 ret = SMB_VFS_SYS_ACL_SET_FILE(conn, to, SMB_ACL_TYPE_ACCESS, posix_acl);
3305 SMB_VFS_SYS_ACL_FREE_ACL(conn, posix_acl);
3309 /****************************************************************************
3310 Do a chmod by setting the ACL USER_OBJ, GROUP_OBJ and OTHER bits in an ACL
3311 and set the mask to rwx. Needed to preserve complex ACLs set by NT.
3312 Note that name is in UNIX character set.
3313 ****************************************************************************/
3315 int chmod_acl(connection_struct *conn, const char *name, mode_t mode)
3317 return copy_access_acl(conn, name, name, mode);
3320 /****************************************************************************
3321 If "inherit permissions" is set and the parent directory has no default
3322 ACL but it does have an Access ACL, inherit this Access ACL to file name.
3323 ****************************************************************************/
3325 int inherit_access_acl(connection_struct *conn, const char *name, mode_t mode)
3328 pstrcpy(dirname, parent_dirname(name));
3330 if (!lp_inherit_perms(SNUM(conn)) || directory_has_default_acl(conn, dirname))
3333 return copy_access_acl(conn, dirname, name, mode);
3336 /****************************************************************************
3337 Do an fchmod by setting the ACL USER_OBJ, GROUP_OBJ and OTHER bits in an ACL
3338 and set the mask to rwx. Needed to preserve complex ACLs set by NT.
3339 ****************************************************************************/
3341 int fchmod_acl(files_struct *fsp, int fd, mode_t mode)
3343 connection_struct *conn = fsp->conn;
3344 SMB_ACL_T posix_acl = NULL;
3347 if ((posix_acl = SMB_VFS_SYS_ACL_GET_FD(fsp, fd)) == NULL)
3350 if ((ret = chmod_acl_internals(conn, posix_acl, mode)) == -1)
3353 ret = SMB_VFS_SYS_ACL_SET_FD(fsp, fd, posix_acl);
3357 SMB_VFS_SYS_ACL_FREE_ACL(conn, posix_acl);
3361 /****************************************************************************
3362 Check for an existing default POSIX ACL on a directory.
3363 ****************************************************************************/
3365 BOOL directory_has_default_acl(connection_struct *conn, const char *fname)
3367 SMB_ACL_T def_acl = SMB_VFS_SYS_ACL_GET_FILE( conn, fname, SMB_ACL_TYPE_DEFAULT);
3368 BOOL has_acl = False;
3369 SMB_ACL_ENTRY_T entry;
3371 if (def_acl != NULL && (SMB_VFS_SYS_ACL_GET_ENTRY(conn, def_acl, SMB_ACL_FIRST_ENTRY, &entry) == 1)) {
3376 SMB_VFS_SYS_ACL_FREE_ACL(conn, def_acl);
3381 /****************************************************************************
3382 Map from wire type to permset.
3383 ****************************************************************************/
3385 static BOOL unix_ex_wire_to_permset(connection_struct *conn, unsigned char wire_perm, SMB_ACL_PERMSET_T *p_permset)
3387 if (wire_perm & ~(SMB_POSIX_ACL_READ|SMB_POSIX_ACL_WRITE|SMB_POSIX_ACL_EXECUTE)) {
3391 if (SMB_VFS_SYS_ACL_CLEAR_PERMS(conn, *p_permset) == -1) {
3395 if (wire_perm & SMB_POSIX_ACL_READ) {
3396 if (SMB_VFS_SYS_ACL_ADD_PERM(conn, *p_permset, SMB_ACL_READ) == -1) {
3400 if (wire_perm & SMB_POSIX_ACL_WRITE) {
3401 if (SMB_VFS_SYS_ACL_ADD_PERM(conn, *p_permset, SMB_ACL_WRITE) == -1) {
3405 if (wire_perm & SMB_POSIX_ACL_EXECUTE) {
3406 if (SMB_VFS_SYS_ACL_ADD_PERM(conn, *p_permset, SMB_ACL_EXECUTE) == -1) {
3413 /****************************************************************************
3414 Map from wire type to tagtype.
3415 ****************************************************************************/
3417 static BOOL unix_ex_wire_to_tagtype(unsigned char wire_tt, SMB_ACL_TAG_T *p_tt)
3420 case SMB_POSIX_ACL_USER_OBJ:
3421 *p_tt = SMB_ACL_USER_OBJ;
3423 case SMB_POSIX_ACL_USER:
3424 *p_tt = SMB_ACL_USER;
3426 case SMB_POSIX_ACL_GROUP_OBJ:
3427 *p_tt = SMB_ACL_GROUP_OBJ;
3429 case SMB_POSIX_ACL_GROUP:
3430 *p_tt = SMB_ACL_GROUP;
3432 case SMB_POSIX_ACL_MASK:
3433 *p_tt = SMB_ACL_MASK;
3435 case SMB_POSIX_ACL_OTHER:
3436 *p_tt = SMB_ACL_OTHER;
3444 /****************************************************************************
3445 Create a new POSIX acl from wire permissions.
3446 FIXME ! How does the share mask/mode fit into this.... ?
3447 ****************************************************************************/
3449 static SMB_ACL_T create_posix_acl_from_wire(connection_struct *conn, uint16 num_acls, const char *pdata)
3452 SMB_ACL_T the_acl = SMB_VFS_SYS_ACL_INIT(conn, num_acls);
3454 if (the_acl == NULL) {
3458 for (i = 0; i < num_acls; i++) {
3459 SMB_ACL_ENTRY_T the_entry;
3460 SMB_ACL_PERMSET_T the_permset;
3461 SMB_ACL_TAG_T tag_type;
3463 if (SMB_VFS_SYS_ACL_CREATE_ENTRY(conn, &the_acl, &the_entry) == -1) {
3464 DEBUG(0,("create_posix_acl_from_wire: Failed to create entry %u. (%s)\n",
3465 i, strerror(errno) ));
3469 if (!unix_ex_wire_to_tagtype(CVAL(pdata,(i*SMB_POSIX_ACL_ENTRY_SIZE)), &tag_type)) {
3470 DEBUG(0,("create_posix_acl_from_wire: invalid wire tagtype %u on entry %u.\n",
3471 CVAL(pdata,(i*SMB_POSIX_ACL_ENTRY_SIZE)), i ));
3475 if (SMB_VFS_SYS_ACL_SET_TAG_TYPE(conn, the_entry, tag_type) == -1) {
3476 DEBUG(0,("create_posix_acl_from_wire: Failed to set tagtype on entry %u. (%s)\n",
3477 i, strerror(errno) ));
3481 /* Get the permset pointer from the new ACL entry. */
3482 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, the_entry, &the_permset) == -1) {
3483 DEBUG(0,("create_posix_acl_from_wire: Failed to get permset on entry %u. (%s)\n",
3484 i, strerror(errno) ));
3488 /* Map from wire to permissions. */
3489 if (!unix_ex_wire_to_permset(conn, CVAL(pdata,(i*SMB_POSIX_ACL_ENTRY_SIZE)+1), &the_permset)) {
3490 DEBUG(0,("create_posix_acl_from_wire: invalid permset %u on entry %u.\n",
3491 CVAL(pdata,(i*SMB_POSIX_ACL_ENTRY_SIZE) + 1), i ));
3495 /* Now apply to the new ACL entry. */
3496 if (SMB_VFS_SYS_ACL_SET_PERMSET(conn, the_entry, the_permset) == -1) {
3497 DEBUG(0,("create_posix_acl_from_wire: Failed to add permset on entry %u. (%s)\n",
3498 i, strerror(errno) ));
3502 if (tag_type == SMB_ACL_USER) {
3503 uint32 uidval = IVAL(pdata,(i*SMB_POSIX_ACL_ENTRY_SIZE)+2);
3504 uid_t uid = (uid_t)uidval;
3505 if (SMB_VFS_SYS_ACL_SET_QUALIFIER(conn, the_entry,(void *)&uid) == -1) {
3506 DEBUG(0,("create_posix_acl_from_wire: Failed to set uid %u on entry %u. (%s)\n",
3507 (unsigned int)uid, i, strerror(errno) ));
3512 if (tag_type == SMB_ACL_GROUP) {
3513 uint32 gidval = IVAL(pdata,(i*SMB_POSIX_ACL_ENTRY_SIZE)+2);
3514 gid_t gid = (uid_t)gidval;
3515 if (SMB_VFS_SYS_ACL_SET_QUALIFIER(conn, the_entry,(void *)&gid) == -1) {
3516 DEBUG(0,("create_posix_acl_from_wire: Failed to set gid %u on entry %u. (%s)\n",
3517 (unsigned int)gid, i, strerror(errno) ));
3527 if (the_acl != NULL) {
3528 SMB_VFS_SYS_ACL_FREE_ACL(conn, the_acl);
3533 /****************************************************************************
3534 Calls from UNIX extensions - Default POSIX ACL set.
3535 If num_def_acls == 0 and not a directory just return. If it is a directory
3536 and num_def_acls == 0 then remove the default acl. Else set the default acl
3538 ****************************************************************************/
3540 BOOL set_unix_posix_default_acl(connection_struct *conn, const char *fname, SMB_STRUCT_STAT *psbuf,
3541 uint16 num_def_acls, const char *pdata)
3543 SMB_ACL_T def_acl = NULL;
3545 if (num_def_acls && !S_ISDIR(psbuf->st_mode)) {
3546 DEBUG(5,("set_unix_posix_default_acl: Can't set default ACL on non-directory file %s\n", fname ));
3551 if (!num_def_acls) {
3552 /* Remove the default ACL. */
3553 if (SMB_VFS_SYS_ACL_DELETE_DEF_FILE(conn, fname) == -1) {
3554 DEBUG(5,("set_unix_posix_default_acl: acl_delete_def_file failed on directory %s (%s)\n",
3555 fname, strerror(errno) ));
3561 if ((def_acl = create_posix_acl_from_wire(conn, num_def_acls, pdata)) == NULL) {
3565 if (SMB_VFS_SYS_ACL_SET_FILE(conn, fname, SMB_ACL_TYPE_DEFAULT, def_acl) == -1) {
3566 DEBUG(5,("set_unix_posix_default_acl: acl_set_file failed on directory %s (%s)\n",
3567 fname, strerror(errno) ));
3568 SMB_VFS_SYS_ACL_FREE_ACL(conn, def_acl);
3572 DEBUG(10,("set_unix_posix_default_acl: set default acl for file %s\n", fname ));
3573 SMB_VFS_SYS_ACL_FREE_ACL(conn, def_acl);
3577 /****************************************************************************
3578 Remove an ACL from a file. As we don't have acl_delete_entry() available
3579 we must read the current acl and copy all entries except MASK, USER and GROUP
3580 to a new acl, then set that. This (at least on Linux) causes any ACL to be
3582 FIXME ! How does the share mask/mode fit into this.... ?
3583 ****************************************************************************/
3585 static BOOL remove_posix_acl(connection_struct *conn, files_struct *fsp, const char *fname)
3587 SMB_ACL_T file_acl = NULL;
3588 int entry_id = SMB_ACL_FIRST_ENTRY;
3589 SMB_ACL_ENTRY_T entry;
3591 /* Create a new ACL with only 3 entries, u/g/w. */
3592 SMB_ACL_T new_file_acl = SMB_VFS_SYS_ACL_INIT(conn, 3);
3593 SMB_ACL_ENTRY_T user_ent = NULL;
3594 SMB_ACL_ENTRY_T group_ent = NULL;
3595 SMB_ACL_ENTRY_T other_ent = NULL;
3597 if (new_file_acl == NULL) {
3598 DEBUG(5,("remove_posix_acl: failed to init new ACL with 3 entries for file %s.\n", fname));
3602 /* Now create the u/g/w entries. */
3603 if (SMB_VFS_SYS_ACL_CREATE_ENTRY(conn, &new_file_acl, &user_ent) == -1) {
3604 DEBUG(5,("remove_posix_acl: Failed to create user entry for file %s. (%s)\n",
3605 fname, strerror(errno) ));
3608 if (SMB_VFS_SYS_ACL_SET_TAG_TYPE(conn, user_ent, SMB_ACL_USER_OBJ) == -1) {
3609 DEBUG(5,("remove_posix_acl: Failed to set user entry for file %s. (%s)\n",
3610 fname, strerror(errno) ));
3614 if (SMB_VFS_SYS_ACL_CREATE_ENTRY(conn, &new_file_acl, &group_ent) == -1) {
3615 DEBUG(5,("remove_posix_acl: Failed to create group entry for file %s. (%s)\n",
3616 fname, strerror(errno) ));
3619 if (SMB_VFS_SYS_ACL_SET_TAG_TYPE(conn, group_ent, SMB_ACL_GROUP_OBJ) == -1) {
3620 DEBUG(5,("remove_posix_acl: Failed to set group entry for file %s. (%s)\n",
3621 fname, strerror(errno) ));
3625 if (SMB_VFS_SYS_ACL_CREATE_ENTRY(conn, &new_file_acl, &other_ent) == -1) {
3626 DEBUG(5,("remove_posix_acl: Failed to create other entry for file %s. (%s)\n",
3627 fname, strerror(errno) ));
3630 if (SMB_VFS_SYS_ACL_SET_TAG_TYPE(conn, other_ent, SMB_ACL_OTHER) == -1) {
3631 DEBUG(5,("remove_posix_acl: Failed to set other entry for file %s. (%s)\n",
3632 fname, strerror(errno) ));
3636 /* Get the current file ACL. */
3637 if (fsp && fsp->fd != -1) {
3638 file_acl = SMB_VFS_SYS_ACL_GET_FD(fsp, fsp->fd);
3640 file_acl = SMB_VFS_SYS_ACL_GET_FILE( conn, fname, SMB_ACL_TYPE_ACCESS);
3643 if (file_acl == NULL) {
3644 /* This is only returned if an error occurred. Even for a file with
3645 no acl a u/g/w acl should be returned. */
3646 DEBUG(5,("remove_posix_acl: failed to get ACL from file %s (%s).\n",
3647 fname, strerror(errno) ));
3651 while ( SMB_VFS_SYS_ACL_GET_ENTRY(conn, file_acl, entry_id, &entry) == 1) {
3652 SMB_ACL_TAG_T tagtype;
3653 SMB_ACL_PERMSET_T permset;
3656 if (entry_id == SMB_ACL_FIRST_ENTRY)
3657 entry_id = SMB_ACL_NEXT_ENTRY;
3659 if (SMB_VFS_SYS_ACL_GET_TAG_TYPE(conn, entry, &tagtype) == -1) {
3660 DEBUG(5,("remove_posix_acl: failed to get tagtype from ACL on file %s (%s).\n",
3661 fname, strerror(errno) ));
3665 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, entry, &permset) == -1) {
3666 DEBUG(5,("remove_posix_acl: failed to get permset from ACL on file %s (%s).\n",
3667 fname, strerror(errno) ));
3671 if (tagtype == SMB_ACL_USER_OBJ) {
3672 if (SMB_VFS_SYS_ACL_SET_PERMSET(conn, user_ent, permset) == -1) {
3673 DEBUG(5,("remove_posix_acl: failed to set permset from ACL on file %s (%s).\n",
3674 fname, strerror(errno) ));
3676 } else if (tagtype == SMB_ACL_GROUP_OBJ) {
3677 if (SMB_VFS_SYS_ACL_SET_PERMSET(conn, group_ent, permset) == -1) {
3678 DEBUG(5,("remove_posix_acl: failed to set permset from ACL on file %s (%s).\n",
3679 fname, strerror(errno) ));
3681 } else if (tagtype == SMB_ACL_OTHER) {
3682 if (SMB_VFS_SYS_ACL_SET_PERMSET(conn, other_ent, permset) == -1) {
3683 DEBUG(5,("remove_posix_acl: failed to set permset from ACL on file %s (%s).\n",
3684 fname, strerror(errno) ));
3694 SMB_VFS_SYS_ACL_FREE_ACL(conn, file_acl);
3697 SMB_VFS_SYS_ACL_FREE_ACL(conn, new_file_acl);
3702 /****************************************************************************
3703 Calls from UNIX extensions - POSIX ACL set.
3704 If num_def_acls == 0 then read/modify/write acl after removing all entries
3705 except SMB_ACL_USER_OBJ, SMB_ACL_GROUP_OBJ, SMB_ACL_OTHER.
3706 ****************************************************************************/
3708 BOOL set_unix_posix_acl(connection_struct *conn, files_struct *fsp, const char *fname, uint16 num_acls, const char *pdata)
3710 SMB_ACL_T file_acl = NULL;
3713 /* Remove the ACL from the file. */
3714 return remove_posix_acl(conn, fsp, fname);
3717 if ((file_acl = create_posix_acl_from_wire(conn, num_acls, pdata)) == NULL) {
3721 if (fsp && fsp->fd != -1) {
3722 /* The preferred way - use an open fd. */
3723 if (SMB_VFS_SYS_ACL_SET_FD(fsp, fsp->fd, file_acl) == -1) {
3724 DEBUG(5,("set_unix_posix_acl: acl_set_file failed on %s (%s)\n",
3725 fname, strerror(errno) ));
3726 SMB_VFS_SYS_ACL_FREE_ACL(conn, file_acl);
3730 if (SMB_VFS_SYS_ACL_SET_FILE(conn, fname, SMB_ACL_TYPE_ACCESS, file_acl) == -1) {
3731 DEBUG(5,("set_unix_posix_acl: acl_set_file failed on %s (%s)\n",
3732 fname, strerror(errno) ));
3733 SMB_VFS_SYS_ACL_FREE_ACL(conn, file_acl);
3738 DEBUG(10,("set_unix_posix_acl: set acl for file %s\n", fname ));
3739 SMB_VFS_SYS_ACL_FREE_ACL(conn, file_acl);
3743 /****************************************************************************
3744 Check for POSIX group ACLs. If none use stat entry.
3745 Return -1 if no match, 0 if match and denied, 1 if match and allowed.
3746 ****************************************************************************/
3748 static int check_posix_acl_group_write(connection_struct *conn, const char *fname, SMB_STRUCT_STAT *psbuf)
3750 SMB_ACL_T posix_acl = NULL;
3751 int entry_id = SMB_ACL_FIRST_ENTRY;
3752 SMB_ACL_ENTRY_T entry;
3754 BOOL seen_mask = False;
3757 if ((posix_acl = SMB_VFS_SYS_ACL_GET_FILE(conn, fname, SMB_ACL_TYPE_ACCESS)) == NULL) {
3761 /* First ensure the group mask allows group read. */
3762 /* Also check any user entries (these take preference over group). */
3764 while ( SMB_VFS_SYS_ACL_GET_ENTRY(conn, posix_acl, entry_id, &entry) == 1) {
3765 SMB_ACL_TAG_T tagtype;
3766 SMB_ACL_PERMSET_T permset;
3767 int have_write = -1;
3770 if (entry_id == SMB_ACL_FIRST_ENTRY)
3771 entry_id = SMB_ACL_NEXT_ENTRY;
3773 if (SMB_VFS_SYS_ACL_GET_TAG_TYPE(conn, entry, &tagtype) == -1) {
3777 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, entry, &permset) == -1) {
3781 have_write = SMB_VFS_SYS_ACL_GET_PERM(conn, permset, SMB_ACL_WRITE);
3782 if (have_write == -1) {
3787 * Solaris returns 2 for this if write is available.
3788 * canonicalize to 0 or 1.
3790 have_write = (have_write ? 1 : 0);
3795 /* We don't have any group or explicit user write permission. */
3796 ret = -1; /* Allow caller to check "other" permissions. */
3797 DEBUG(10,("check_posix_acl_group_write: file %s \
3798 refusing write due to mask.\n", fname));
3805 /* Check against current_user.uid. */
3806 uid_t *puid = (uid_t *)SMB_VFS_SYS_ACL_GET_QUALIFIER(conn, entry);
3810 if (current_user.uid == *puid) {
3811 /* We have a uid match but we must ensure we have seen the acl mask. */
3813 DEBUG(10,("check_posix_acl_group_write: file %s \
3814 match on user %u -> %s.\n", fname, (unsigned int)*puid, ret ? "can write" : "cannot write"));
3826 /* If ret is anything other than -1 we matched on a user entry. */
3831 /* Next check all group entries. */
3832 entry_id = SMB_ACL_FIRST_ENTRY;
3833 while ( SMB_VFS_SYS_ACL_GET_ENTRY(conn, posix_acl, entry_id, &entry) == 1) {
3834 SMB_ACL_TAG_T tagtype;
3835 SMB_ACL_PERMSET_T permset;
3836 int have_write = -1;
3839 if (entry_id == SMB_ACL_FIRST_ENTRY)
3840 entry_id = SMB_ACL_NEXT_ENTRY;
3842 if (SMB_VFS_SYS_ACL_GET_TAG_TYPE(conn, entry, &tagtype) == -1) {
3846 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, entry, &permset) == -1) {
3850 have_write = SMB_VFS_SYS_ACL_GET_PERM(conn, permset, SMB_ACL_WRITE);
3851 if (have_write == -1) {
3856 * Solaris returns 2 for this if write is available.
3857 * canonicalize to 0 or 1.
3859 have_write = (have_write ? 1 : 0);
3864 gid_t *pgid = (gid_t *)SMB_VFS_SYS_ACL_GET_QUALIFIER(conn, entry);
3869 /* Does it match the current effective group ? */
3870 if (current_user.gid == *pgid) {
3872 DEBUG(10,("check_posix_acl_group_write: file %s \
3873 match on group %u -> can write.\n", fname, (unsigned int)*pgid ));
3875 /* If we don't have write permission this entry doesn't
3876 * prevent the subsequent enumeration of the supplementary
3884 /* Continue with the supplementary groups. */
3885 for (i = 0; i < current_user.ngroups; i++) {
3886 if (current_user.groups[i] == *pgid) {
3888 DEBUG(10,("check_posix_acl_group_write: file %s \
3889 match on group %u -> can write.\n", fname, (unsigned int)*pgid ));
3891 /* If we don't have write permission this entry doesn't
3892 terminate the enumeration of the entries. */
3896 /* But does terminate the group iteration. */
3907 /* If ret is -1 here we didn't match on the user entry or
3908 supplemental group entries. */
3910 DEBUG(10,("check_posix_acl_group_write: ret = %d before check_stat:\n", ret));
3914 /* Do we match on the owning group entry ? */
3916 /* First, does it match the current effective group ? */
3917 if (current_user.gid == psbuf->st_gid) {
3918 ret = (psbuf->st_mode & S_IWGRP) ? 1 : 0;
3919 DEBUG(10,("check_posix_acl_group_write: file %s \
3920 match on owning group %u -> %s.\n", fname, (unsigned int)psbuf->st_gid, ret ? "can write" : "cannot write"));
3924 /* If not look at the supplementary groups. */
3925 for (i = 0; i < current_user.ngroups; i++) {
3926 if (current_user.groups[i] == psbuf->st_gid) {
3927 ret = (psbuf->st_mode & S_IWGRP) ? 1 : 0;
3928 DEBUG(10,("check_posix_acl_group_write: file %s \
3929 match on owning group %u -> %s.\n", fname, (unsigned int)psbuf->st_gid, ret ? "can write" : "cannot write"));
3934 if (i == current_user.ngroups) {
3935 DEBUG(10,("check_posix_acl_group_write: file %s \
3936 failed to match on user or group in token (ret = %d).\n", fname, ret ));
3941 SMB_VFS_SYS_ACL_FREE_ACL(conn, posix_acl);
3943 DEBUG(10,("check_posix_acl_group_write: file %s returning (ret = %d).\n", fname, ret ));
3947 /****************************************************************************
3948 Actually emulate the in-kernel access checking for delete access. We need
3949 this to successfully return ACCESS_DENIED on a file open for delete access.
3950 ****************************************************************************/
3952 BOOL can_delete_file_in_directory(connection_struct *conn, const char *fname)
3954 SMB_STRUCT_STAT sbuf;
3958 if (!CAN_WRITE(conn)) {
3962 /* Get the parent directory permission mask and owners. */
3963 pstrcpy(dname, parent_dirname(fname));
3964 if(SMB_VFS_STAT(conn, dname, &sbuf) != 0) {
3967 if (!S_ISDIR(sbuf.st_mode)) {
3970 if (current_user.uid == 0 || conn->admin_user) {
3971 /* I'm sorry sir, I didn't know you were root... */
3975 /* Check primary owner write access. */
3976 if (current_user.uid == sbuf.st_uid) {
3977 return (sbuf.st_mode & S_IWUSR) ? True : False;
3981 /* sticky bit means delete only by owner or root. */
3982 if (sbuf.st_mode & S_ISVTX) {
3983 SMB_STRUCT_STAT sbuf_file;
3984 if(SMB_VFS_STAT(conn, fname, &sbuf_file) != 0) {
3987 if (current_user.uid == sbuf_file.st_uid) {
3994 /* Check group or explicit user acl entry write access. */
3995 ret = check_posix_acl_group_write(conn, dname, &sbuf);
3996 if (ret == 0 || ret == 1) {
3997 return ret ? True : False;
4000 /* Finally check other write access. */
4001 return (sbuf.st_mode & S_IWOTH) ? True : False;
4004 /****************************************************************************
4005 Actually emulate the in-kernel access checking for write access. We need
4006 this to successfully check for ability to write for dos filetimes.
4007 ****************************************************************************/
4009 BOOL can_write_to_file(connection_struct *conn, const char *fname)
4011 SMB_STRUCT_STAT sbuf;
4014 if (!CAN_WRITE(conn)) {
4018 if (current_user.uid == 0 || conn->admin_user) {
4019 /* I'm sorry sir, I didn't know you were root... */
4023 /* Get the file permission mask and owners. */
4024 if(SMB_VFS_STAT(conn, fname, &sbuf) != 0) {
4028 /* Check primary owner write access. */
4029 if (current_user.uid == sbuf.st_uid) {
4030 return (sbuf.st_mode & S_IWUSR) ? True : False;
4033 /* Check group or explicit user acl entry write access. */
4034 ret = check_posix_acl_group_write(conn, fname, &sbuf);
4035 if (ret == 0 || ret == 1) {
4036 return ret ? True : False;
4039 /* Finally check other write access. */
4040 return (sbuf.st_mode & S_IWOTH) ? True : False;