2 Unix SMB/CIFS implementation.
3 SMB NT Security Descriptor / Unix permission conversion.
4 Copyright (C) Jeremy Allison 1994-2000.
5 Copyright (C) Andreas Gruenbacher 2002.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24 extern struct current_user current_user;
25 extern struct generic_mapping file_generic_mapping;
28 #define DBGC_CLASS DBGC_ACLS
30 /****************************************************************************
31 Data structures representing the internal ACE format.
32 ****************************************************************************/
34 enum ace_owner {UID_ACE, GID_ACE, WORLD_ACE};
35 enum ace_attribute {ALLOW_ACE, DENY_ACE}; /* Used for incoming NT ACLS. */
37 typedef union posix_id {
43 typedef struct canon_ace {
44 struct canon_ace *next, *prev;
46 mode_t perms; /* Only use S_I(R|W|X)USR mode bits here. */
48 enum ace_owner owner_type;
49 enum ace_attribute attr;
54 #define ALL_ACE_PERMS (S_IRUSR|S_IWUSR|S_IXUSR)
57 * EA format of user.SAMBA_PAI (Samba_Posix_Acl_Interitance)
60 * | 1 | 1 | 2 | 2 | ....
61 * +------+------+-------------+---------------------+-------------+--------------------+
62 * | vers | flag | num_entries | num_default_entries | ..entries.. | default_entries... |
63 * +------+------+-------------+---------------------+-------------+--------------------+
66 #define PAI_VERSION_OFFSET 0
67 #define PAI_FLAG_OFFSET 1
68 #define PAI_NUM_ENTRIES_OFFSET 2
69 #define PAI_NUM_DEFAULT_ENTRIES_OFFSET 4
70 #define PAI_ENTRIES_BASE 6
73 #define PAI_ACL_FLAG_PROTECTED 0x1
74 #define PAI_ENTRY_LENGTH 5
77 * In memory format of user.SAMBA_PAI attribute.
81 struct pai_entry *next, *prev;
82 enum ace_owner owner_type;
88 unsigned int num_entries;
89 struct pai_entry *entry_list;
90 unsigned int num_def_entries;
91 struct pai_entry *def_entry_list;
94 /************************************************************************
95 Return a uint32 of the pai_entry principal.
96 ************************************************************************/
98 static uint32 get_pai_entry_val(struct pai_entry *paie)
100 switch (paie->owner_type) {
102 DEBUG(10,("get_pai_entry_val: uid = %u\n", (unsigned int)paie->unix_ug.uid ));
103 return (uint32)paie->unix_ug.uid;
105 DEBUG(10,("get_pai_entry_val: gid = %u\n", (unsigned int)paie->unix_ug.gid ));
106 return (uint32)paie->unix_ug.gid;
109 DEBUG(10,("get_pai_entry_val: world ace\n"));
114 /************************************************************************
115 Return a uint32 of the entry principal.
116 ************************************************************************/
118 static uint32 get_entry_val(canon_ace *ace_entry)
120 switch (ace_entry->owner_type) {
122 DEBUG(10,("get_entry_val: uid = %u\n", (unsigned int)ace_entry->unix_ug.uid ));
123 return (uint32)ace_entry->unix_ug.uid;
125 DEBUG(10,("get_entry_val: gid = %u\n", (unsigned int)ace_entry->unix_ug.gid ));
126 return (uint32)ace_entry->unix_ug.gid;
129 DEBUG(10,("get_entry_val: world ace\n"));
134 /************************************************************************
135 Count the inherited entries.
136 ************************************************************************/
138 static unsigned int num_inherited_entries(canon_ace *ace_list)
140 unsigned int num_entries = 0;
142 for (; ace_list; ace_list = ace_list->next)
143 if (ace_list->inherited)
148 /************************************************************************
149 Create the on-disk format. Caller must free.
150 ************************************************************************/
152 static char *create_pai_buf(canon_ace *file_ace_list, canon_ace *dir_ace_list, BOOL pai_protected, size_t *store_size)
154 char *pai_buf = NULL;
155 canon_ace *ace_list = NULL;
156 char *entry_offset = NULL;
157 unsigned int num_entries = 0;
158 unsigned int num_def_entries = 0;
160 for (ace_list = file_ace_list; ace_list; ace_list = ace_list->next)
161 if (ace_list->inherited)
164 for (ace_list = dir_ace_list; ace_list; ace_list = ace_list->next)
165 if (ace_list->inherited)
168 DEBUG(10,("create_pai_buf: num_entries = %u, num_def_entries = %u\n", num_entries, num_def_entries ));
170 *store_size = PAI_ENTRIES_BASE + ((num_entries + num_def_entries)*PAI_ENTRY_LENGTH);
172 pai_buf = (char *)SMB_MALLOC(*store_size);
177 /* Set up the header. */
178 memset(pai_buf, '\0', PAI_ENTRIES_BASE);
179 SCVAL(pai_buf,PAI_VERSION_OFFSET,PAI_VERSION);
180 SCVAL(pai_buf,PAI_FLAG_OFFSET,(pai_protected ? PAI_ACL_FLAG_PROTECTED : 0));
181 SSVAL(pai_buf,PAI_NUM_ENTRIES_OFFSET,num_entries);
182 SSVAL(pai_buf,PAI_NUM_DEFAULT_ENTRIES_OFFSET,num_def_entries);
184 entry_offset = pai_buf + PAI_ENTRIES_BASE;
186 for (ace_list = file_ace_list; ace_list; ace_list = ace_list->next) {
187 if (ace_list->inherited) {
188 uint8 type_val = (unsigned char)ace_list->owner_type;
189 uint32 entry_val = get_entry_val(ace_list);
191 SCVAL(entry_offset,0,type_val);
192 SIVAL(entry_offset,1,entry_val);
193 entry_offset += PAI_ENTRY_LENGTH;
197 for (ace_list = dir_ace_list; ace_list; ace_list = ace_list->next) {
198 if (ace_list->inherited) {
199 uint8 type_val = (unsigned char)ace_list->owner_type;
200 uint32 entry_val = get_entry_val(ace_list);
202 SCVAL(entry_offset,0,type_val);
203 SIVAL(entry_offset,1,entry_val);
204 entry_offset += PAI_ENTRY_LENGTH;
211 /************************************************************************
212 Store the user.SAMBA_PAI attribute on disk.
213 ************************************************************************/
215 static void store_inheritance_attributes(files_struct *fsp, canon_ace *file_ace_list,
216 canon_ace *dir_ace_list, BOOL pai_protected)
222 if (!lp_map_acl_inherit(SNUM(fsp->conn)))
226 * Don't store if this ACL isn't protected and
227 * none of the entries in it are marked as inherited.
230 if (!pai_protected && num_inherited_entries(file_ace_list) == 0 && num_inherited_entries(dir_ace_list) == 0) {
231 /* Instead just remove the attribute if it exists. */
232 if (fsp->fh->fd != -1)
233 SMB_VFS_FREMOVEXATTR(fsp, fsp->fh->fd, SAMBA_POSIX_INHERITANCE_EA_NAME);
235 SMB_VFS_REMOVEXATTR(fsp->conn, fsp->fsp_name, SAMBA_POSIX_INHERITANCE_EA_NAME);
239 pai_buf = create_pai_buf(file_ace_list, dir_ace_list, pai_protected, &store_size);
241 if (fsp->fh->fd != -1)
242 ret = SMB_VFS_FSETXATTR(fsp, fsp->fh->fd, SAMBA_POSIX_INHERITANCE_EA_NAME,
243 pai_buf, store_size, 0);
245 ret = SMB_VFS_SETXATTR(fsp->conn,fsp->fsp_name, SAMBA_POSIX_INHERITANCE_EA_NAME,
246 pai_buf, store_size, 0);
250 DEBUG(10,("store_inheritance_attribute:%s for file %s\n", pai_protected ? " (protected)" : "", fsp->fsp_name));
251 if (ret == -1 && !no_acl_syscall_error(errno))
252 DEBUG(1,("store_inheritance_attribute: Error %s\n", strerror(errno) ));
255 /************************************************************************
256 Delete the in memory inheritance info.
257 ************************************************************************/
259 static void free_inherited_info(struct pai_val *pal)
262 struct pai_entry *paie, *paie_next;
263 for (paie = pal->entry_list; paie; paie = paie_next) {
264 paie_next = paie->next;
267 for (paie = pal->def_entry_list; paie; paie = paie_next) {
268 paie_next = paie->next;
275 /************************************************************************
276 Was this ACL protected ?
277 ************************************************************************/
279 static BOOL get_protected_flag(struct pai_val *pal)
283 return pal->pai_protected;
286 /************************************************************************
287 Was this ACE inherited ?
288 ************************************************************************/
290 static BOOL get_inherited_flag(struct pai_val *pal, canon_ace *ace_entry, BOOL default_ace)
292 struct pai_entry *paie;
297 /* If the entry exists it is inherited. */
298 for (paie = (default_ace ? pal->def_entry_list : pal->entry_list); paie; paie = paie->next) {
299 if (ace_entry->owner_type == paie->owner_type &&
300 get_entry_val(ace_entry) == get_pai_entry_val(paie))
306 /************************************************************************
307 Ensure an attribute just read is valid.
308 ************************************************************************/
310 static BOOL check_pai_ok(char *pai_buf, size_t pai_buf_data_size)
313 uint16 num_def_entries;
315 if (pai_buf_data_size < PAI_ENTRIES_BASE) {
316 /* Corrupted - too small. */
320 if (CVAL(pai_buf,PAI_VERSION_OFFSET) != PAI_VERSION)
323 num_entries = SVAL(pai_buf,PAI_NUM_ENTRIES_OFFSET);
324 num_def_entries = SVAL(pai_buf,PAI_NUM_DEFAULT_ENTRIES_OFFSET);
326 /* Check the entry lists match. */
327 /* Each entry is 5 bytes (type plus 4 bytes of uid or gid). */
329 if (((num_entries + num_def_entries)*PAI_ENTRY_LENGTH) + PAI_ENTRIES_BASE != pai_buf_data_size)
336 /************************************************************************
337 Convert to in-memory format.
338 ************************************************************************/
340 static struct pai_val *create_pai_val(char *buf, size_t size)
343 struct pai_val *paiv = NULL;
346 if (!check_pai_ok(buf, size))
349 paiv = SMB_MALLOC_P(struct pai_val);
353 memset(paiv, '\0', sizeof(struct pai_val));
355 paiv->pai_protected = (CVAL(buf,PAI_FLAG_OFFSET) == PAI_ACL_FLAG_PROTECTED);
357 paiv->num_entries = SVAL(buf,PAI_NUM_ENTRIES_OFFSET);
358 paiv->num_def_entries = SVAL(buf,PAI_NUM_DEFAULT_ENTRIES_OFFSET);
360 entry_offset = buf + PAI_ENTRIES_BASE;
362 DEBUG(10,("create_pai_val:%s num_entries = %u, num_def_entries = %u\n",
363 paiv->pai_protected ? " (pai_protected)" : "", paiv->num_entries, paiv->num_def_entries ));
365 for (i = 0; i < paiv->num_entries; i++) {
366 struct pai_entry *paie;
368 paie = SMB_MALLOC_P(struct pai_entry);
370 free_inherited_info(paiv);
374 paie->owner_type = (enum ace_owner)CVAL(entry_offset,0);
375 switch( paie->owner_type) {
377 paie->unix_ug.uid = (uid_t)IVAL(entry_offset,1);
378 DEBUG(10,("create_pai_val: uid = %u\n", (unsigned int)paie->unix_ug.uid ));
381 paie->unix_ug.gid = (gid_t)IVAL(entry_offset,1);
382 DEBUG(10,("create_pai_val: gid = %u\n", (unsigned int)paie->unix_ug.gid ));
385 paie->unix_ug.world = -1;
386 DEBUG(10,("create_pai_val: world ace\n"));
389 free_inherited_info(paiv);
392 entry_offset += PAI_ENTRY_LENGTH;
393 DLIST_ADD(paiv->entry_list, paie);
396 for (i = 0; i < paiv->num_def_entries; i++) {
397 struct pai_entry *paie;
399 paie = SMB_MALLOC_P(struct pai_entry);
401 free_inherited_info(paiv);
405 paie->owner_type = (enum ace_owner)CVAL(entry_offset,0);
406 switch( paie->owner_type) {
408 paie->unix_ug.uid = (uid_t)IVAL(entry_offset,1);
409 DEBUG(10,("create_pai_val: (def) uid = %u\n", (unsigned int)paie->unix_ug.uid ));
412 paie->unix_ug.gid = (gid_t)IVAL(entry_offset,1);
413 DEBUG(10,("create_pai_val: (def) gid = %u\n", (unsigned int)paie->unix_ug.gid ));
416 paie->unix_ug.world = -1;
417 DEBUG(10,("create_pai_val: (def) world ace\n"));
420 free_inherited_info(paiv);
423 entry_offset += PAI_ENTRY_LENGTH;
424 DLIST_ADD(paiv->def_entry_list, paie);
430 /************************************************************************
431 Load the user.SAMBA_PAI attribute.
432 ************************************************************************/
434 static struct pai_val *load_inherited_info(files_struct *fsp)
437 size_t pai_buf_size = 1024;
438 struct pai_val *paiv = NULL;
441 if (!lp_map_acl_inherit(SNUM(fsp->conn)))
444 if ((pai_buf = (char *)SMB_MALLOC(pai_buf_size)) == NULL)
448 if (fsp->fh->fd != -1)
449 ret = SMB_VFS_FGETXATTR(fsp, fsp->fh->fd, SAMBA_POSIX_INHERITANCE_EA_NAME,
450 pai_buf, pai_buf_size);
452 ret = SMB_VFS_GETXATTR(fsp->conn,fsp->fsp_name,SAMBA_POSIX_INHERITANCE_EA_NAME,
453 pai_buf, pai_buf_size);
456 if (errno != ERANGE) {
459 /* Buffer too small - enlarge it. */
462 if (pai_buf_size > 1024*1024) {
463 return NULL; /* Limit malloc to 1mb. */
465 if ((pai_buf = (char *)SMB_MALLOC(pai_buf_size)) == NULL)
470 DEBUG(10,("load_inherited_info: ret = %lu for file %s\n", (unsigned long)ret, fsp->fsp_name));
473 /* No attribute or not supported. */
475 if (errno != ENOATTR)
476 DEBUG(10,("load_inherited_info: Error %s\n", strerror(errno) ));
479 DEBUG(10,("load_inherited_info: Error %s\n", strerror(errno) ));
485 paiv = create_pai_val(pai_buf, ret);
487 if (paiv && paiv->pai_protected)
488 DEBUG(10,("load_inherited_info: ACL is protected for file %s\n", fsp->fsp_name));
494 /****************************************************************************
495 Functions to manipulate the internal ACE format.
496 ****************************************************************************/
498 /****************************************************************************
499 Count a linked list of canonical ACE entries.
500 ****************************************************************************/
502 static size_t count_canon_ace_list( canon_ace *list_head )
507 for (ace = list_head; ace; ace = ace->next)
513 /****************************************************************************
514 Free a linked list of canonical ACE entries.
515 ****************************************************************************/
517 static void free_canon_ace_list( canon_ace *list_head )
519 canon_ace *list, *next;
521 for (list = list_head; list; list = next) {
523 DLIST_REMOVE(list_head, list);
528 /****************************************************************************
529 Function to duplicate a canon_ace entry.
530 ****************************************************************************/
532 static canon_ace *dup_canon_ace( canon_ace *src_ace)
534 canon_ace *dst_ace = SMB_MALLOC_P(canon_ace);
540 dst_ace->prev = dst_ace->next = NULL;
544 /****************************************************************************
545 Print out a canon ace.
546 ****************************************************************************/
548 static void print_canon_ace(canon_ace *pace, int num)
552 dbgtext( "canon_ace index %d. Type = %s ", num, pace->attr == ALLOW_ACE ? "allow" : "deny" );
553 dbgtext( "SID = %s ", sid_to_string( str, &pace->trustee));
554 if (pace->owner_type == UID_ACE) {
555 const char *u_name = uidtoname(pace->unix_ug.uid);
556 dbgtext( "uid %u (%s) ", (unsigned int)pace->unix_ug.uid, u_name );
557 } else if (pace->owner_type == GID_ACE) {
558 char *g_name = gidtoname(pace->unix_ug.gid);
559 dbgtext( "gid %u (%s) ", (unsigned int)pace->unix_ug.gid, g_name );
562 switch (pace->type) {
564 dbgtext( "SMB_ACL_USER ");
566 case SMB_ACL_USER_OBJ:
567 dbgtext( "SMB_ACL_USER_OBJ ");
570 dbgtext( "SMB_ACL_GROUP ");
572 case SMB_ACL_GROUP_OBJ:
573 dbgtext( "SMB_ACL_GROUP_OBJ ");
576 dbgtext( "SMB_ACL_OTHER ");
583 dbgtext( "(inherited) ");
585 dbgtext( "%c", pace->perms & S_IRUSR ? 'r' : '-');
586 dbgtext( "%c", pace->perms & S_IWUSR ? 'w' : '-');
587 dbgtext( "%c\n", pace->perms & S_IXUSR ? 'x' : '-');
590 /****************************************************************************
591 Print out a canon ace list.
592 ****************************************************************************/
594 static void print_canon_ace_list(const char *name, canon_ace *ace_list)
598 if( DEBUGLVL( 10 )) {
599 dbgtext( "print_canon_ace_list: %s\n", name );
600 for (;ace_list; ace_list = ace_list->next, count++)
601 print_canon_ace(ace_list, count );
605 /****************************************************************************
606 Map POSIX ACL perms to canon_ace permissions (a mode_t containing only S_(R|W|X)USR bits).
607 ****************************************************************************/
609 static mode_t convert_permset_to_mode_t(connection_struct *conn, SMB_ACL_PERMSET_T permset)
613 ret |= (SMB_VFS_SYS_ACL_GET_PERM(conn, permset, SMB_ACL_READ) ? S_IRUSR : 0);
614 ret |= (SMB_VFS_SYS_ACL_GET_PERM(conn, permset, SMB_ACL_WRITE) ? S_IWUSR : 0);
615 ret |= (SMB_VFS_SYS_ACL_GET_PERM(conn, permset, SMB_ACL_EXECUTE) ? S_IXUSR : 0);
620 /****************************************************************************
621 Map generic UNIX permissions to canon_ace permissions (a mode_t containing only S_(R|W|X)USR bits).
622 ****************************************************************************/
624 static mode_t unix_perms_to_acl_perms(mode_t mode, int r_mask, int w_mask, int x_mask)
638 /****************************************************************************
639 Map canon_ace permissions (a mode_t containing only S_(R|W|X)USR bits) to
640 an SMB_ACL_PERMSET_T.
641 ****************************************************************************/
643 static int map_acl_perms_to_permset(connection_struct *conn, mode_t mode, SMB_ACL_PERMSET_T *p_permset)
645 if (SMB_VFS_SYS_ACL_CLEAR_PERMS(conn, *p_permset) == -1)
647 if (mode & S_IRUSR) {
648 if (SMB_VFS_SYS_ACL_ADD_PERM(conn, *p_permset, SMB_ACL_READ) == -1)
651 if (mode & S_IWUSR) {
652 if (SMB_VFS_SYS_ACL_ADD_PERM(conn, *p_permset, SMB_ACL_WRITE) == -1)
655 if (mode & S_IXUSR) {
656 if (SMB_VFS_SYS_ACL_ADD_PERM(conn, *p_permset, SMB_ACL_EXECUTE) == -1)
661 /****************************************************************************
662 Function to create owner and group SIDs from a SMB_STRUCT_STAT.
663 ****************************************************************************/
665 static void create_file_sids(SMB_STRUCT_STAT *psbuf, DOM_SID *powner_sid, DOM_SID *pgroup_sid)
667 uid_to_sid( powner_sid, psbuf->st_uid );
668 gid_to_sid( pgroup_sid, psbuf->st_gid );
671 /****************************************************************************
672 Merge aces with a common sid - if both are allow or deny, OR the permissions together and
673 delete the second one. If the first is deny, mask the permissions off and delete the allow
674 if the permissions become zero, delete the deny if the permissions are non zero.
675 ****************************************************************************/
677 static void merge_aces( canon_ace **pp_list_head )
679 canon_ace *list_head = *pp_list_head;
680 canon_ace *curr_ace_outer;
681 canon_ace *curr_ace_outer_next;
684 * First, merge allow entries with identical SIDs, and deny entries
685 * with identical SIDs.
688 for (curr_ace_outer = list_head; curr_ace_outer; curr_ace_outer = curr_ace_outer_next) {
690 canon_ace *curr_ace_next;
692 curr_ace_outer_next = curr_ace_outer->next; /* Save the link in case we delete. */
694 for (curr_ace = curr_ace_outer->next; curr_ace; curr_ace = curr_ace_next) {
696 curr_ace_next = curr_ace->next; /* Save the link in case of delete. */
698 if (sid_equal(&curr_ace->trustee, &curr_ace_outer->trustee) &&
699 (curr_ace->attr == curr_ace_outer->attr)) {
701 if( DEBUGLVL( 10 )) {
702 dbgtext("merge_aces: Merging ACE's\n");
703 print_canon_ace( curr_ace_outer, 0);
704 print_canon_ace( curr_ace, 0);
707 /* Merge two allow or two deny ACE's. */
709 curr_ace_outer->perms |= curr_ace->perms;
710 DLIST_REMOVE(list_head, curr_ace);
712 curr_ace_outer_next = curr_ace_outer->next; /* We may have deleted the link. */
718 * Now go through and mask off allow permissions with deny permissions.
719 * We can delete either the allow or deny here as we know that each SID
720 * appears only once in the list.
723 for (curr_ace_outer = list_head; curr_ace_outer; curr_ace_outer = curr_ace_outer_next) {
725 canon_ace *curr_ace_next;
727 curr_ace_outer_next = curr_ace_outer->next; /* Save the link in case we delete. */
729 for (curr_ace = curr_ace_outer->next; curr_ace; curr_ace = curr_ace_next) {
731 curr_ace_next = curr_ace->next; /* Save the link in case of delete. */
734 * Subtract ACE's with different entries. Due to the ordering constraints
735 * we've put on the ACL, we know the deny must be the first one.
738 if (sid_equal(&curr_ace->trustee, &curr_ace_outer->trustee) &&
739 (curr_ace_outer->attr == DENY_ACE) && (curr_ace->attr == ALLOW_ACE)) {
741 if( DEBUGLVL( 10 )) {
742 dbgtext("merge_aces: Masking ACE's\n");
743 print_canon_ace( curr_ace_outer, 0);
744 print_canon_ace( curr_ace, 0);
747 curr_ace->perms &= ~curr_ace_outer->perms;
749 if (curr_ace->perms == 0) {
752 * The deny overrides the allow. Remove the allow.
755 DLIST_REMOVE(list_head, curr_ace);
757 curr_ace_outer_next = curr_ace_outer->next; /* We may have deleted the link. */
762 * Even after removing permissions, there
763 * are still allow permissions - delete the deny.
764 * It is safe to delete the deny here,
765 * as we are guarenteed by the deny first
766 * ordering that all the deny entries for
767 * this SID have already been merged into one
768 * before we can get to an allow ace.
771 DLIST_REMOVE(list_head, curr_ace_outer);
772 SAFE_FREE(curr_ace_outer);
777 } /* end for curr_ace */
778 } /* end for curr_ace_outer */
780 /* We may have modified the list. */
782 *pp_list_head = list_head;
785 /****************************************************************************
786 Check if we need to return NT4.x compatible ACL entries.
787 ****************************************************************************/
789 static BOOL nt4_compatible_acls(void)
791 int compat = lp_acl_compatibility();
793 if (compat == ACL_COMPAT_AUTO) {
794 enum remote_arch_types ra_type = get_remote_arch();
796 /* Automatically adapt to client */
797 return (ra_type <= RA_WINNT);
799 return (compat == ACL_COMPAT_WINNT);
803 /****************************************************************************
804 Map canon_ace perms to permission bits NT.
805 The attr element is not used here - we only process deny entries on set,
806 not get. Deny entries are implicit on get with ace->perms = 0.
807 ****************************************************************************/
809 static SEC_ACCESS map_canon_ace_perms(int snum, int *pacl_type, DOM_SID *powner_sid, canon_ace *ace, BOOL directory_ace)
814 *pacl_type = SEC_ACE_TYPE_ACCESS_ALLOWED;
816 if (lp_acl_map_full_control(snum) && ((ace->perms & ALL_ACE_PERMS) == ALL_ACE_PERMS)) {
818 nt_mask = UNIX_DIRECTORY_ACCESS_RWX;
820 nt_mask = UNIX_ACCESS_RWX;
822 } else if ((ace->perms & ALL_ACE_PERMS) == (mode_t)0) {
824 * Windows NT refuses to display ACEs with no permissions in them (but
825 * they are perfectly legal with Windows 2000). If the ACE has empty
826 * permissions we cannot use 0, so we use the otherwise unused
827 * WRITE_OWNER permission, which we ignore when we set an ACL.
828 * We abstract this into a #define of UNIX_ACCESS_NONE to allow this
829 * to be changed in the future.
832 if (nt4_compatible_acls())
833 nt_mask = UNIX_ACCESS_NONE;
838 nt_mask |= ((ace->perms & S_IRUSR) ? UNIX_DIRECTORY_ACCESS_R : 0 );
839 nt_mask |= ((ace->perms & S_IWUSR) ? UNIX_DIRECTORY_ACCESS_W : 0 );
840 nt_mask |= ((ace->perms & S_IXUSR) ? UNIX_DIRECTORY_ACCESS_X : 0 );
842 nt_mask |= ((ace->perms & S_IRUSR) ? UNIX_ACCESS_R : 0 );
843 nt_mask |= ((ace->perms & S_IWUSR) ? UNIX_ACCESS_W : 0 );
844 nt_mask |= ((ace->perms & S_IXUSR) ? UNIX_ACCESS_X : 0 );
848 DEBUG(10,("map_canon_ace_perms: Mapped (UNIX) %x to (NT) %x\n",
849 (unsigned int)ace->perms, (unsigned int)nt_mask ));
851 init_sec_access(&sa,nt_mask);
855 /****************************************************************************
856 Map NT perms to a UNIX mode_t.
857 ****************************************************************************/
859 #define FILE_SPECIFIC_READ_BITS (FILE_READ_DATA|FILE_READ_EA|FILE_READ_ATTRIBUTES)
860 #define FILE_SPECIFIC_WRITE_BITS (FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_WRITE_EA|FILE_WRITE_ATTRIBUTES)
861 #define FILE_SPECIFIC_EXECUTE_BITS (FILE_EXECUTE)
863 static mode_t map_nt_perms( SEC_ACCESS sec_access, int type)
869 if(sec_access.mask & GENERIC_ALL_ACCESS)
870 mode = S_IRUSR|S_IWUSR|S_IXUSR;
872 mode |= (sec_access.mask & (GENERIC_READ_ACCESS|FILE_SPECIFIC_READ_BITS)) ? S_IRUSR : 0;
873 mode |= (sec_access.mask & (GENERIC_WRITE_ACCESS|FILE_SPECIFIC_WRITE_BITS)) ? S_IWUSR : 0;
874 mode |= (sec_access.mask & (GENERIC_EXECUTE_ACCESS|FILE_SPECIFIC_EXECUTE_BITS)) ? S_IXUSR : 0;
878 if(sec_access.mask & GENERIC_ALL_ACCESS)
879 mode = S_IRGRP|S_IWGRP|S_IXGRP;
881 mode |= (sec_access.mask & (GENERIC_READ_ACCESS|FILE_SPECIFIC_READ_BITS)) ? S_IRGRP : 0;
882 mode |= (sec_access.mask & (GENERIC_WRITE_ACCESS|FILE_SPECIFIC_WRITE_BITS)) ? S_IWGRP : 0;
883 mode |= (sec_access.mask & (GENERIC_EXECUTE_ACCESS|FILE_SPECIFIC_EXECUTE_BITS)) ? S_IXGRP : 0;
887 if(sec_access.mask & GENERIC_ALL_ACCESS)
888 mode = S_IROTH|S_IWOTH|S_IXOTH;
890 mode |= (sec_access.mask & (GENERIC_READ_ACCESS|FILE_SPECIFIC_READ_BITS)) ? S_IROTH : 0;
891 mode |= (sec_access.mask & (GENERIC_WRITE_ACCESS|FILE_SPECIFIC_WRITE_BITS)) ? S_IWOTH : 0;
892 mode |= (sec_access.mask & (GENERIC_EXECUTE_ACCESS|FILE_SPECIFIC_EXECUTE_BITS)) ? S_IXOTH : 0;
900 /****************************************************************************
901 Unpack a SEC_DESC into a UNIX owner and group.
902 ****************************************************************************/
904 static BOOL unpack_nt_owners(int snum, SMB_STRUCT_STAT *psbuf, uid_t *puser, gid_t *pgrp, uint32 security_info_sent, SEC_DESC *psd)
912 if(security_info_sent == 0) {
913 DEBUG(0,("unpack_nt_owners: no security info sent !\n"));
918 * Validate the owner and group SID's.
921 memset(&owner_sid, '\0', sizeof(owner_sid));
922 memset(&grp_sid, '\0', sizeof(grp_sid));
924 DEBUG(5,("unpack_nt_owners: validating owner_sids.\n"));
927 * Don't immediately fail if the owner sid cannot be validated.
928 * This may be a group chown only set.
931 if (security_info_sent & OWNER_SECURITY_INFORMATION) {
932 sid_copy(&owner_sid, psd->owner_sid);
933 if (!sid_to_uid(&owner_sid, puser)) {
934 if (lp_force_unknown_acl_user(snum)) {
935 /* this allows take ownership to work
937 *puser = current_user.ut.uid;
939 DEBUG(3,("unpack_nt_owners: unable to validate"
940 " owner sid for %s\n",
941 sid_string_static(&owner_sid)));
948 * Don't immediately fail if the group sid cannot be validated.
949 * This may be an owner chown only set.
952 if (security_info_sent & GROUP_SECURITY_INFORMATION) {
953 sid_copy(&grp_sid, psd->grp_sid);
954 if (!sid_to_gid( &grp_sid, pgrp)) {
955 if (lp_force_unknown_acl_user(snum)) {
956 /* this allows take group ownership to work
958 *pgrp = current_user.ut.gid;
960 DEBUG(3,("unpack_nt_owners: unable to validate"
967 DEBUG(5,("unpack_nt_owners: owner_sids validated.\n"));
972 /****************************************************************************
973 Ensure the enforced permissions for this share apply.
974 ****************************************************************************/
976 static void apply_default_perms(files_struct *fsp, canon_ace *pace, mode_t type)
978 int snum = SNUM(fsp->conn);
979 mode_t and_bits = (mode_t)0;
980 mode_t or_bits = (mode_t)0;
982 /* Get the initial bits to apply. */
984 if (fsp->is_directory) {
985 and_bits = lp_dir_security_mask(snum);
986 or_bits = lp_force_dir_security_mode(snum);
988 and_bits = lp_security_mask(snum);
989 or_bits = lp_force_security_mode(snum);
992 /* Now bounce them into the S_USR space. */
995 /* Ensure owner has read access. */
996 pace->perms |= S_IRUSR;
997 if (fsp->is_directory)
998 pace->perms |= (S_IWUSR|S_IXUSR);
999 and_bits = unix_perms_to_acl_perms(and_bits, S_IRUSR, S_IWUSR, S_IXUSR);
1000 or_bits = unix_perms_to_acl_perms(or_bits, S_IRUSR, S_IWUSR, S_IXUSR);
1003 and_bits = unix_perms_to_acl_perms(and_bits, S_IRGRP, S_IWGRP, S_IXGRP);
1004 or_bits = unix_perms_to_acl_perms(or_bits, S_IRGRP, S_IWGRP, S_IXGRP);
1007 and_bits = unix_perms_to_acl_perms(and_bits, S_IROTH, S_IWOTH, S_IXOTH);
1008 or_bits = unix_perms_to_acl_perms(or_bits, S_IROTH, S_IWOTH, S_IXOTH);
1012 pace->perms = ((pace->perms & and_bits)|or_bits);
1015 /****************************************************************************
1016 Check if a given uid/SID is in a group gid/SID. This is probably very
1017 expensive and will need optimisation. A *lot* of optimisation :-). JRA.
1018 ****************************************************************************/
1020 static BOOL uid_entry_in_group( canon_ace *uid_ace, canon_ace *group_ace )
1024 /* "Everyone" always matches every uid. */
1026 if (sid_equal(&group_ace->trustee, &global_sid_World))
1029 /* Assume that the current user is in the current group (force group) */
1031 if (uid_ace->unix_ug.uid == current_user.ut.uid && group_ace->unix_ug.gid == current_user.ut.gid)
1034 fstrcpy(u_name, uidtoname(uid_ace->unix_ug.uid));
1035 return user_in_group_sid(u_name, &group_ace->trustee);
1038 /****************************************************************************
1039 A well formed POSIX file or default ACL has at least 3 entries, a
1040 SMB_ACL_USER_OBJ, SMB_ACL_GROUP_OBJ, SMB_ACL_OTHER_OBJ.
1041 In addition, the owner must always have at least read access.
1042 When using this call on get_acl, the pst struct is valid and contains
1043 the mode of the file. When using this call on set_acl, the pst struct has
1044 been modified to have a mode containing the default for this file or directory
1046 ****************************************************************************/
1048 static BOOL ensure_canon_entry_valid(canon_ace **pp_ace,
1050 const DOM_SID *pfile_owner_sid,
1051 const DOM_SID *pfile_grp_sid,
1052 SMB_STRUCT_STAT *pst,
1056 BOOL got_user = False;
1057 BOOL got_grp = False;
1058 BOOL got_other = False;
1059 canon_ace *pace_other = NULL;
1061 for (pace = *pp_ace; pace; pace = pace->next) {
1062 if (pace->type == SMB_ACL_USER_OBJ) {
1065 apply_default_perms(fsp, pace, S_IRUSR);
1068 } else if (pace->type == SMB_ACL_GROUP_OBJ) {
1071 * Ensure create mask/force create mode is respected on set.
1075 apply_default_perms(fsp, pace, S_IRGRP);
1078 } else if (pace->type == SMB_ACL_OTHER) {
1081 * Ensure create mask/force create mode is respected on set.
1085 apply_default_perms(fsp, pace, S_IROTH);
1092 if ((pace = SMB_MALLOC_P(canon_ace)) == NULL) {
1093 DEBUG(0,("ensure_canon_entry_valid: malloc fail.\n"));
1098 pace->type = SMB_ACL_USER_OBJ;
1099 pace->owner_type = UID_ACE;
1100 pace->unix_ug.uid = pst->st_uid;
1101 pace->trustee = *pfile_owner_sid;
1102 pace->attr = ALLOW_ACE;
1105 /* See if the owning user is in any of the other groups in
1106 the ACE. If so, OR in the permissions from that group. */
1108 BOOL group_matched = False;
1109 canon_ace *pace_iter;
1111 for (pace_iter = *pp_ace; pace_iter; pace_iter = pace_iter->next) {
1112 if (pace_iter->type == SMB_ACL_GROUP_OBJ || pace_iter->type == SMB_ACL_GROUP) {
1113 if (uid_entry_in_group(pace, pace_iter)) {
1114 pace->perms |= pace_iter->perms;
1115 group_matched = True;
1120 /* If we only got an "everyone" perm, just use that. */
1121 if (!group_matched) {
1123 pace->perms = pace_other->perms;
1128 apply_default_perms(fsp, pace, S_IRUSR);
1130 pace->perms = unix_perms_to_acl_perms(pst->st_mode, S_IRUSR, S_IWUSR, S_IXUSR);
1133 DLIST_ADD(*pp_ace, pace);
1137 if ((pace = SMB_MALLOC_P(canon_ace)) == NULL) {
1138 DEBUG(0,("ensure_canon_entry_valid: malloc fail.\n"));
1143 pace->type = SMB_ACL_GROUP_OBJ;
1144 pace->owner_type = GID_ACE;
1145 pace->unix_ug.uid = pst->st_gid;
1146 pace->trustee = *pfile_grp_sid;
1147 pace->attr = ALLOW_ACE;
1149 /* If we only got an "everyone" perm, just use that. */
1151 pace->perms = pace_other->perms;
1154 apply_default_perms(fsp, pace, S_IRGRP);
1156 pace->perms = unix_perms_to_acl_perms(pst->st_mode, S_IRGRP, S_IWGRP, S_IXGRP);
1159 DLIST_ADD(*pp_ace, pace);
1163 if ((pace = SMB_MALLOC_P(canon_ace)) == NULL) {
1164 DEBUG(0,("ensure_canon_entry_valid: malloc fail.\n"));
1169 pace->type = SMB_ACL_OTHER;
1170 pace->owner_type = WORLD_ACE;
1171 pace->unix_ug.world = -1;
1172 pace->trustee = global_sid_World;
1173 pace->attr = ALLOW_ACE;
1176 apply_default_perms(fsp, pace, S_IROTH);
1178 pace->perms = unix_perms_to_acl_perms(pst->st_mode, S_IROTH, S_IWOTH, S_IXOTH);
1180 DLIST_ADD(*pp_ace, pace);
1186 /****************************************************************************
1187 Check if a POSIX ACL has the required SMB_ACL_USER_OBJ and SMB_ACL_GROUP_OBJ entries.
1188 If it does not have them, check if there are any entries where the trustee is the
1189 file owner or the owning group, and map these to SMB_ACL_USER_OBJ and SMB_ACL_GROUP_OBJ.
1190 ****************************************************************************/
1192 static void check_owning_objs(canon_ace *ace, DOM_SID *pfile_owner_sid, DOM_SID *pfile_grp_sid)
1194 BOOL got_user_obj, got_group_obj;
1195 canon_ace *current_ace;
1198 entries = count_canon_ace_list(ace);
1199 got_user_obj = False;
1200 got_group_obj = False;
1202 for (i=0, current_ace = ace; i < entries; i++, current_ace = current_ace->next) {
1203 if (current_ace->type == SMB_ACL_USER_OBJ)
1204 got_user_obj = True;
1205 else if (current_ace->type == SMB_ACL_GROUP_OBJ)
1206 got_group_obj = True;
1208 if (got_user_obj && got_group_obj) {
1209 DEBUG(10,("check_owning_objs: ACL had owning user/group entries.\n"));
1213 for (i=0, current_ace = ace; i < entries; i++, current_ace = current_ace->next) {
1214 if (!got_user_obj && current_ace->owner_type == UID_ACE &&
1215 sid_equal(¤t_ace->trustee, pfile_owner_sid)) {
1216 current_ace->type = SMB_ACL_USER_OBJ;
1217 got_user_obj = True;
1219 if (!got_group_obj && current_ace->owner_type == GID_ACE &&
1220 sid_equal(¤t_ace->trustee, pfile_grp_sid)) {
1221 current_ace->type = SMB_ACL_GROUP_OBJ;
1222 got_group_obj = True;
1226 DEBUG(10,("check_owning_objs: ACL is missing an owner entry.\n"));
1228 DEBUG(10,("check_owning_objs: ACL is missing an owning group entry.\n"));
1231 /****************************************************************************
1232 Unpack a SEC_DESC into two canonical ace lists.
1233 ****************************************************************************/
1235 static BOOL create_canon_ace_lists(files_struct *fsp, SMB_STRUCT_STAT *pst,
1236 DOM_SID *pfile_owner_sid,
1237 DOM_SID *pfile_grp_sid,
1238 canon_ace **ppfile_ace, canon_ace **ppdir_ace,
1241 BOOL all_aces_are_inherit_only = (fsp->is_directory ? True : False);
1242 canon_ace *file_ace = NULL;
1243 canon_ace *dir_ace = NULL;
1244 canon_ace *tmp_ace = NULL;
1245 canon_ace *current_ace = NULL;
1246 BOOL got_dir_allow = False;
1247 BOOL got_file_allow = False;
1254 * Convert the incoming ACL into a more regular form.
1257 for(i = 0; i < dacl->num_aces; i++) {
1258 SEC_ACE *psa = &dacl->ace[i];
1260 if((psa->type != SEC_ACE_TYPE_ACCESS_ALLOWED) && (psa->type != SEC_ACE_TYPE_ACCESS_DENIED)) {
1261 DEBUG(3,("create_canon_ace_lists: unable to set anything but an ALLOW or DENY ACE.\n"));
1265 if (nt4_compatible_acls()) {
1267 * The security mask may be UNIX_ACCESS_NONE which should map into
1268 * no permissions (we overload the WRITE_OWNER bit for this) or it
1269 * should be one of the ALL/EXECUTE/READ/WRITE bits. Arrange for this
1270 * to be so. Any other bits override the UNIX_ACCESS_NONE bit.
1274 * Convert GENERIC bits to specific bits.
1277 se_map_generic(&psa->info.mask, &file_generic_mapping);
1279 psa->info.mask &= (UNIX_ACCESS_NONE|FILE_ALL_ACCESS);
1281 if(psa->info.mask != UNIX_ACCESS_NONE)
1282 psa->info.mask &= ~UNIX_ACCESS_NONE;
1287 * Deal with the fact that NT 4.x re-writes the canonical format
1288 * that we return for default ACLs. If a directory ACE is identical
1289 * to a inherited directory ACE then NT changes the bits so that the
1290 * first ACE is set to OI|IO and the second ACE for this SID is set
1291 * to CI. We need to repair this. JRA.
1294 for(i = 0; i < dacl->num_aces; i++) {
1295 SEC_ACE *psa1 = &dacl->ace[i];
1297 for (j = i + 1; j < dacl->num_aces; j++) {
1298 SEC_ACE *psa2 = &dacl->ace[j];
1300 if (psa1->info.mask != psa2->info.mask)
1303 if (!sid_equal(&psa1->trustee, &psa2->trustee))
1307 * Ok - permission bits and SIDs are equal.
1308 * Check if flags were re-written.
1311 if (psa1->flags & SEC_ACE_FLAG_INHERIT_ONLY) {
1313 psa1->flags |= (psa2->flags & (SEC_ACE_FLAG_CONTAINER_INHERIT|SEC_ACE_FLAG_OBJECT_INHERIT));
1314 psa2->flags &= ~(SEC_ACE_FLAG_CONTAINER_INHERIT|SEC_ACE_FLAG_OBJECT_INHERIT);
1316 } else if (psa2->flags & SEC_ACE_FLAG_INHERIT_ONLY) {
1318 psa2->flags |= (psa1->flags & (SEC_ACE_FLAG_CONTAINER_INHERIT|SEC_ACE_FLAG_OBJECT_INHERIT));
1319 psa1->flags &= ~(SEC_ACE_FLAG_CONTAINER_INHERIT|SEC_ACE_FLAG_OBJECT_INHERIT);
1325 for(i = 0; i < dacl->num_aces; i++) {
1326 SEC_ACE *psa = &dacl->ace[i];
1329 * Ignore non-mappable SIDs (NT Authority, BUILTIN etc).
1332 if (non_mappable_sid(&psa->trustee)) {
1334 DEBUG(10,("create_canon_ace_lists: ignoring non-mappable SID %s\n",
1335 sid_to_string(str, &psa->trustee) ));
1340 * Create a cannon_ace entry representing this NT DACL ACE.
1343 if ((current_ace = SMB_MALLOC_P(canon_ace)) == NULL) {
1344 free_canon_ace_list(file_ace);
1345 free_canon_ace_list(dir_ace);
1346 DEBUG(0,("create_canon_ace_lists: malloc fail.\n"));
1350 ZERO_STRUCTP(current_ace);
1352 sid_copy(¤t_ace->trustee, &psa->trustee);
1355 * Try and work out if the SID is a user or group
1356 * as we need to flag these differently for POSIX.
1357 * Note what kind of a POSIX ACL this should map to.
1360 if( sid_equal(¤t_ace->trustee, &global_sid_World)) {
1361 current_ace->owner_type = WORLD_ACE;
1362 current_ace->unix_ug.world = -1;
1363 current_ace->type = SMB_ACL_OTHER;
1364 } else if (sid_equal(¤t_ace->trustee, &global_sid_Creator_Owner)) {
1365 current_ace->owner_type = UID_ACE;
1366 current_ace->unix_ug.uid = pst->st_uid;
1367 current_ace->type = SMB_ACL_USER_OBJ;
1370 * The Creator Owner entry only specifies inheritable permissions,
1371 * never access permissions. WinNT doesn't always set the ACE to
1372 *INHERIT_ONLY, though.
1375 if (nt4_compatible_acls())
1376 psa->flags |= SEC_ACE_FLAG_INHERIT_ONLY;
1377 } else if (sid_equal(¤t_ace->trustee, &global_sid_Creator_Group)) {
1378 current_ace->owner_type = GID_ACE;
1379 current_ace->unix_ug.gid = pst->st_gid;
1380 current_ace->type = SMB_ACL_GROUP_OBJ;
1383 * The Creator Group entry only specifies inheritable permissions,
1384 * never access permissions. WinNT doesn't always set the ACE to
1385 *INHERIT_ONLY, though.
1387 if (nt4_compatible_acls())
1388 psa->flags |= SEC_ACE_FLAG_INHERIT_ONLY;
1390 } else if (sid_to_uid( ¤t_ace->trustee, ¤t_ace->unix_ug.uid)) {
1391 current_ace->owner_type = UID_ACE;
1392 current_ace->type = SMB_ACL_USER;
1393 } else if (sid_to_gid( ¤t_ace->trustee, ¤t_ace->unix_ug.gid)) {
1394 current_ace->owner_type = GID_ACE;
1395 current_ace->type = SMB_ACL_GROUP;
1399 free_canon_ace_list(file_ace);
1400 free_canon_ace_list(dir_ace);
1401 DEBUG(0,("create_canon_ace_lists: unable to map SID %s to uid or gid.\n",
1402 sid_to_string(str, ¤t_ace->trustee) ));
1403 SAFE_FREE(current_ace);
1408 * Map the given NT permissions into a UNIX mode_t containing only
1409 * S_I(R|W|X)USR bits.
1412 current_ace->perms |= map_nt_perms( psa->info, S_IRUSR);
1413 current_ace->attr = (psa->type == SEC_ACE_TYPE_ACCESS_ALLOWED) ? ALLOW_ACE : DENY_ACE;
1414 current_ace->inherited = ((psa->flags & SEC_ACE_FLAG_INHERITED_ACE) ? True : False);
1417 * Now add the created ace to either the file list, the directory
1418 * list, or both. We *MUST* preserve the order here (hence we use
1419 * DLIST_ADD_END) as NT ACLs are order dependent.
1422 if (fsp->is_directory) {
1425 * We can only add to the default POSIX ACE list if the ACE is
1426 * designed to be inherited by both files and directories.
1429 if ((psa->flags & (SEC_ACE_FLAG_OBJECT_INHERIT|SEC_ACE_FLAG_CONTAINER_INHERIT)) ==
1430 (SEC_ACE_FLAG_OBJECT_INHERIT|SEC_ACE_FLAG_CONTAINER_INHERIT)) {
1432 DLIST_ADD_END(dir_ace, current_ace, tmp_ace);
1435 * Note if this was an allow ace. We can't process
1436 * any further deny ace's after this.
1439 if (current_ace->attr == ALLOW_ACE)
1440 got_dir_allow = True;
1442 if ((current_ace->attr == DENY_ACE) && got_dir_allow) {
1443 DEBUG(0,("create_canon_ace_lists: malformed ACL in inheritable ACL ! \
1444 Deny entry after Allow entry. Failing to set on file %s.\n", fsp->fsp_name ));
1445 free_canon_ace_list(file_ace);
1446 free_canon_ace_list(dir_ace);
1450 if( DEBUGLVL( 10 )) {
1451 dbgtext("create_canon_ace_lists: adding dir ACL:\n");
1452 print_canon_ace( current_ace, 0);
1456 * If this is not an inherit only ACE we need to add a duplicate
1460 if (!(psa->flags & SEC_ACE_FLAG_INHERIT_ONLY)) {
1461 canon_ace *dup_ace = dup_canon_ace(current_ace);
1464 DEBUG(0,("create_canon_ace_lists: malloc fail !\n"));
1465 free_canon_ace_list(file_ace);
1466 free_canon_ace_list(dir_ace);
1471 * We must not free current_ace here as its
1472 * pointer is now owned by the dir_ace list.
1474 current_ace = dup_ace;
1477 * We must not free current_ace here as its
1478 * pointer is now owned by the dir_ace list.
1486 * Only add to the file ACL if not inherit only.
1489 if (current_ace && !(psa->flags & SEC_ACE_FLAG_INHERIT_ONLY)) {
1490 DLIST_ADD_END(file_ace, current_ace, tmp_ace);
1493 * Note if this was an allow ace. We can't process
1494 * any further deny ace's after this.
1497 if (current_ace->attr == ALLOW_ACE)
1498 got_file_allow = True;
1500 if ((current_ace->attr == DENY_ACE) && got_file_allow) {
1501 DEBUG(0,("create_canon_ace_lists: malformed ACL in file ACL ! \
1502 Deny entry after Allow entry. Failing to set on file %s.\n", fsp->fsp_name ));
1503 free_canon_ace_list(file_ace);
1504 free_canon_ace_list(dir_ace);
1508 if( DEBUGLVL( 10 )) {
1509 dbgtext("create_canon_ace_lists: adding file ACL:\n");
1510 print_canon_ace( current_ace, 0);
1512 all_aces_are_inherit_only = False;
1514 * We must not free current_ace here as its
1515 * pointer is now owned by the file_ace list.
1521 * Free if ACE was not added.
1524 SAFE_FREE(current_ace);
1527 if (fsp->is_directory && all_aces_are_inherit_only) {
1529 * Windows 2000 is doing one of these weird 'inherit acl'
1530 * traverses to conserve NTFS ACL resources. Just pretend
1531 * there was no DACL sent. JRA.
1534 DEBUG(10,("create_canon_ace_lists: Win2k inherit acl traverse. Ignoring DACL.\n"));
1535 free_canon_ace_list(file_ace);
1536 free_canon_ace_list(dir_ace);
1541 * Check if we have SMB_ACL_USER_OBJ and SMB_ACL_GROUP_OBJ entries in each
1542 * ACL. If we don't have them, check if any SMB_ACL_USER/SMB_ACL_GROUP
1543 * entries can be converted to *_OBJ. Usually we will already have these
1544 * entries in the Default ACL, and the Access ACL will not have them.
1547 check_owning_objs(file_ace, pfile_owner_sid, pfile_grp_sid);
1550 check_owning_objs(dir_ace, pfile_owner_sid, pfile_grp_sid);
1554 *ppfile_ace = file_ace;
1555 *ppdir_ace = dir_ace;
1560 /****************************************************************************
1561 ASCII art time again... JRA :-).
1563 We have 4 cases to process when moving from an NT ACL to a POSIX ACL. Firstly,
1564 we insist the ACL is in canonical form (ie. all DENY entries preceede ALLOW
1565 entries). Secondly, the merge code has ensured that all duplicate SID entries for
1566 allow or deny have been merged, so the same SID can only appear once in the deny
1567 list or once in the allow list.
1569 We then process as follows :
1571 ---------------------------------------------------------------------------
1572 First pass - look for a Everyone DENY entry.
1574 If it is deny all (rwx) trunate the list at this point.
1575 Else, walk the list from this point and use the deny permissions of this
1576 entry as a mask on all following allow entries. Finally, delete
1577 the Everyone DENY entry (we have applied it to everything possible).
1579 In addition, in this pass we remove any DENY entries that have
1580 no permissions (ie. they are a DENY nothing).
1581 ---------------------------------------------------------------------------
1582 Second pass - only deal with deny user entries.
1584 DENY user1 (perms XXX)
1587 for all following allow group entries where user1 is in group
1588 new_perms |= group_perms;
1590 user1 entry perms = new_perms & ~ XXX;
1592 Convert the deny entry to an allow entry with the new perms and
1593 push to the end of the list. Note if the user was in no groups
1594 this maps to a specific allow nothing entry for this user.
1596 The common case from the NT ACL choser (userX deny all) is
1597 optimised so we don't do the group lookup - we just map to
1598 an allow nothing entry.
1600 What we're doing here is inferring the allow permissions the
1601 person setting the ACE on user1 wanted by looking at the allow
1602 permissions on the groups the user is currently in. This will
1603 be a snapshot, depending on group membership but is the best
1604 we can do and has the advantage of failing closed rather than
1606 ---------------------------------------------------------------------------
1607 Third pass - only deal with deny group entries.
1609 DENY group1 (perms XXX)
1611 for all following allow user entries where user is in group1
1612 user entry perms = user entry perms & ~ XXX;
1614 If there is a group Everyone allow entry with permissions YYY,
1615 convert the group1 entry to an allow entry and modify its
1618 new_perms = YYY & ~ XXX
1620 and push to the end of the list.
1622 If there is no group Everyone allow entry then convert the
1623 group1 entry to a allow nothing entry and push to the end of the list.
1625 Note that the common case from the NT ACL choser (groupX deny all)
1626 cannot be optimised here as we need to modify user entries who are
1627 in the group to change them to a deny all also.
1629 What we're doing here is modifying the allow permissions of
1630 user entries (which are more specific in POSIX ACLs) to mask
1631 out the explicit deny set on the group they are in. This will
1632 be a snapshot depending on current group membership but is the
1633 best we can do and has the advantage of failing closed rather
1635 ---------------------------------------------------------------------------
1636 Fourth pass - cope with cumulative permissions.
1638 for all allow user entries, if there exists an allow group entry with
1639 more permissive permissions, and the user is in that group, rewrite the
1640 allow user permissions to contain both sets of permissions.
1642 Currently the code for this is #ifdef'ed out as these semantics make
1643 no sense to me. JRA.
1644 ---------------------------------------------------------------------------
1646 Note we *MUST* do the deny user pass first as this will convert deny user
1647 entries into allow user entries which can then be processed by the deny
1650 The above algorithm took a *lot* of thinking about - hence this
1651 explaination :-). JRA.
1652 ****************************************************************************/
1654 /****************************************************************************
1655 Process a canon_ace list entries. This is very complex code. We need
1656 to go through and remove the "deny" permissions from any allow entry that matches
1657 the id of this entry. We have already refused any NT ACL that wasn't in correct
1658 order (DENY followed by ALLOW). If any allow entry ends up with zero permissions,
1659 we just remove it (to fail safe). We have already removed any duplicate ace
1660 entries. Treat an "Everyone" DENY_ACE as a special case - use it to mask all
1662 ****************************************************************************/
1664 static void process_deny_list( canon_ace **pp_ace_list )
1666 canon_ace *ace_list = *pp_ace_list;
1667 canon_ace *curr_ace = NULL;
1668 canon_ace *curr_ace_next = NULL;
1670 /* Pass 1 above - look for an Everyone, deny entry. */
1672 for (curr_ace = ace_list; curr_ace; curr_ace = curr_ace_next) {
1673 canon_ace *allow_ace_p;
1675 curr_ace_next = curr_ace->next; /* So we can't lose the link. */
1677 if (curr_ace->attr != DENY_ACE)
1680 if (curr_ace->perms == (mode_t)0) {
1682 /* Deny nothing entry - delete. */
1684 DLIST_REMOVE(ace_list, curr_ace);
1688 if (!sid_equal(&curr_ace->trustee, &global_sid_World))
1691 /* JRATEST - assert. */
1692 SMB_ASSERT(curr_ace->owner_type == WORLD_ACE);
1694 if (curr_ace->perms == ALL_ACE_PERMS) {
1697 * Optimisation. This is a DENY_ALL to Everyone. Truncate the
1698 * list at this point including this entry.
1701 canon_ace *prev_entry = curr_ace->prev;
1703 free_canon_ace_list( curr_ace );
1705 prev_entry->next = NULL;
1707 /* We deleted the entire list. */
1713 for (allow_ace_p = curr_ace->next; allow_ace_p; allow_ace_p = allow_ace_p->next) {
1716 * Only mask off allow entries.
1719 if (allow_ace_p->attr != ALLOW_ACE)
1722 allow_ace_p->perms &= ~curr_ace->perms;
1726 * Now it's been applied, remove it.
1729 DLIST_REMOVE(ace_list, curr_ace);
1732 /* Pass 2 above - deal with deny user entries. */
1734 for (curr_ace = ace_list; curr_ace; curr_ace = curr_ace_next) {
1735 mode_t new_perms = (mode_t)0;
1736 canon_ace *allow_ace_p;
1739 curr_ace_next = curr_ace->next; /* So we can't lose the link. */
1741 if (curr_ace->attr != DENY_ACE)
1744 if (curr_ace->owner_type != UID_ACE)
1747 if (curr_ace->perms == ALL_ACE_PERMS) {
1750 * Optimisation - this is a deny everything to this user.
1751 * Convert to an allow nothing and push to the end of the list.
1754 curr_ace->attr = ALLOW_ACE;
1755 curr_ace->perms = (mode_t)0;
1756 DLIST_DEMOTE(ace_list, curr_ace, tmp_ace);
1760 for (allow_ace_p = curr_ace->next; allow_ace_p; allow_ace_p = allow_ace_p->next) {
1762 if (allow_ace_p->attr != ALLOW_ACE)
1765 /* We process GID_ACE and WORLD_ACE entries only. */
1767 if (allow_ace_p->owner_type == UID_ACE)
1770 if (uid_entry_in_group( curr_ace, allow_ace_p))
1771 new_perms |= allow_ace_p->perms;
1775 * Convert to a allow entry, modify the perms and push to the end
1779 curr_ace->attr = ALLOW_ACE;
1780 curr_ace->perms = (new_perms & ~curr_ace->perms);
1781 DLIST_DEMOTE(ace_list, curr_ace, tmp_ace);
1784 /* Pass 3 above - deal with deny group entries. */
1786 for (curr_ace = ace_list; curr_ace; curr_ace = curr_ace_next) {
1788 canon_ace *allow_ace_p;
1789 canon_ace *allow_everyone_p = NULL;
1791 curr_ace_next = curr_ace->next; /* So we can't lose the link. */
1793 if (curr_ace->attr != DENY_ACE)
1796 if (curr_ace->owner_type != GID_ACE)
1799 for (allow_ace_p = curr_ace->next; allow_ace_p; allow_ace_p = allow_ace_p->next) {
1801 if (allow_ace_p->attr != ALLOW_ACE)
1804 /* Store a pointer to the Everyone allow, if it exists. */
1805 if (allow_ace_p->owner_type == WORLD_ACE)
1806 allow_everyone_p = allow_ace_p;
1808 /* We process UID_ACE entries only. */
1810 if (allow_ace_p->owner_type != UID_ACE)
1813 /* Mask off the deny group perms. */
1815 if (uid_entry_in_group( allow_ace_p, curr_ace))
1816 allow_ace_p->perms &= ~curr_ace->perms;
1820 * Convert the deny to an allow with the correct perms and
1821 * push to the end of the list.
1824 curr_ace->attr = ALLOW_ACE;
1825 if (allow_everyone_p)
1826 curr_ace->perms = allow_everyone_p->perms & ~curr_ace->perms;
1828 curr_ace->perms = (mode_t)0;
1829 DLIST_DEMOTE(ace_list, curr_ace, tmp_ace);
1833 /* Doing this fourth pass allows Windows semantics to be layered
1834 * on top of POSIX semantics. I'm not sure if this is desirable.
1835 * For example, in W2K ACLs there is no way to say, "Group X no
1836 * access, user Y full access" if user Y is a member of group X.
1837 * This seems completely broken semantics to me.... JRA.
1841 /* Pass 4 above - deal with allow entries. */
1843 for (curr_ace = ace_list; curr_ace; curr_ace = curr_ace_next) {
1844 canon_ace *allow_ace_p;
1846 curr_ace_next = curr_ace->next; /* So we can't lose the link. */
1848 if (curr_ace->attr != ALLOW_ACE)
1851 if (curr_ace->owner_type != UID_ACE)
1854 for (allow_ace_p = ace_list; allow_ace_p; allow_ace_p = allow_ace_p->next) {
1856 if (allow_ace_p->attr != ALLOW_ACE)
1859 /* We process GID_ACE entries only. */
1861 if (allow_ace_p->owner_type != GID_ACE)
1864 /* OR in the group perms. */
1866 if (uid_entry_in_group( curr_ace, allow_ace_p))
1867 curr_ace->perms |= allow_ace_p->perms;
1872 *pp_ace_list = ace_list;
1875 /****************************************************************************
1876 Create a default mode that will be used if a security descriptor entry has
1877 no user/group/world entries.
1878 ****************************************************************************/
1880 static mode_t create_default_mode(files_struct *fsp, BOOL interitable_mode)
1882 int snum = SNUM(fsp->conn);
1883 mode_t and_bits = (mode_t)0;
1884 mode_t or_bits = (mode_t)0;
1885 mode_t mode = interitable_mode ? unix_mode( fsp->conn, FILE_ATTRIBUTE_ARCHIVE, fsp->fsp_name, False) : S_IRUSR;
1887 if (fsp->is_directory)
1888 mode |= (S_IWUSR|S_IXUSR);
1891 * Now AND with the create mode/directory mode bits then OR with the
1892 * force create mode/force directory mode bits.
1895 if (fsp->is_directory) {
1896 and_bits = lp_dir_security_mask(snum);
1897 or_bits = lp_force_dir_security_mode(snum);
1899 and_bits = lp_security_mask(snum);
1900 or_bits = lp_force_security_mode(snum);
1903 return ((mode & and_bits)|or_bits);
1906 /****************************************************************************
1907 Unpack a SEC_DESC into two canonical ace lists. We don't depend on this
1909 ****************************************************************************/
1911 static BOOL unpack_canon_ace(files_struct *fsp,
1912 SMB_STRUCT_STAT *pst,
1913 DOM_SID *pfile_owner_sid,
1914 DOM_SID *pfile_grp_sid,
1915 canon_ace **ppfile_ace, canon_ace **ppdir_ace,
1916 uint32 security_info_sent, SEC_DESC *psd)
1918 canon_ace *file_ace = NULL;
1919 canon_ace *dir_ace = NULL;
1924 if(security_info_sent == 0) {
1925 DEBUG(0,("unpack_canon_ace: no security info sent !\n"));
1930 * If no DACL then this is a chown only security descriptor.
1933 if(!(security_info_sent & DACL_SECURITY_INFORMATION) || !psd->dacl)
1937 * Now go through the DACL and create the canon_ace lists.
1940 if (!create_canon_ace_lists( fsp, pst, pfile_owner_sid, pfile_grp_sid,
1941 &file_ace, &dir_ace, psd->dacl))
1944 if ((file_ace == NULL) && (dir_ace == NULL)) {
1945 /* W2K traverse DACL set - ignore. */
1950 * Go through the canon_ace list and merge entries
1951 * belonging to identical users of identical allow or deny type.
1952 * We can do this as all deny entries come first, followed by
1953 * all allow entries (we have mandated this before accepting this acl).
1956 print_canon_ace_list( "file ace - before merge", file_ace);
1957 merge_aces( &file_ace );
1959 print_canon_ace_list( "dir ace - before merge", dir_ace);
1960 merge_aces( &dir_ace );
1963 * NT ACLs are order dependent. Go through the acl lists and
1964 * process DENY entries by masking the allow entries.
1967 print_canon_ace_list( "file ace - before deny", file_ace);
1968 process_deny_list( &file_ace);
1970 print_canon_ace_list( "dir ace - before deny", dir_ace);
1971 process_deny_list( &dir_ace);
1974 * A well formed POSIX file or default ACL has at least 3 entries, a
1975 * SMB_ACL_USER_OBJ, SMB_ACL_GROUP_OBJ, SMB_ACL_OTHER_OBJ
1976 * and optionally a mask entry. Ensure this is the case.
1979 print_canon_ace_list( "file ace - before valid", file_ace);
1982 * A default 3 element mode entry for a file should be r-- --- ---.
1983 * A default 3 element mode entry for a directory should be rwx --- ---.
1986 pst->st_mode = create_default_mode(fsp, False);
1988 if (!ensure_canon_entry_valid(&file_ace, fsp, pfile_owner_sid, pfile_grp_sid, pst, True)) {
1989 free_canon_ace_list(file_ace);
1990 free_canon_ace_list(dir_ace);
1994 print_canon_ace_list( "dir ace - before valid", dir_ace);
1997 * A default inheritable 3 element mode entry for a directory should be the
1998 * mode Samba will use to create a file within. Ensure user rwx bits are set if
2002 pst->st_mode = create_default_mode(fsp, True);
2004 if (dir_ace && !ensure_canon_entry_valid(&dir_ace, fsp, pfile_owner_sid, pfile_grp_sid, pst, True)) {
2005 free_canon_ace_list(file_ace);
2006 free_canon_ace_list(dir_ace);
2010 print_canon_ace_list( "file ace - return", file_ace);
2011 print_canon_ace_list( "dir ace - return", dir_ace);
2013 *ppfile_ace = file_ace;
2014 *ppdir_ace = dir_ace;
2019 /******************************************************************************
2020 When returning permissions, try and fit NT display
2021 semantics if possible. Note the the canon_entries here must have been malloced.
2022 The list format should be - first entry = owner, followed by group and other user
2023 entries, last entry = other.
2025 Note that this doesn't exactly match the NT semantics for an ACL. As POSIX entries
2026 are not ordered, and match on the most specific entry rather than walking a list,
2027 then a simple POSIX permission of rw-r--r-- should really map to 5 entries,
2029 Entry 0: owner : deny all except read and write.
2030 Entry 1: owner : allow read and write.
2031 Entry 2: group : deny all except read.
2032 Entry 3: group : allow read.
2033 Entry 4: Everyone : allow read.
2035 But NT cannot display this in their ACL editor !
2036 ********************************************************************************/
2038 static void arrange_posix_perms( char *filename, canon_ace **pp_list_head)
2040 canon_ace *list_head = *pp_list_head;
2041 canon_ace *owner_ace = NULL;
2042 canon_ace *other_ace = NULL;
2043 canon_ace *ace = NULL;
2045 for (ace = list_head; ace; ace = ace->next) {
2046 if (ace->type == SMB_ACL_USER_OBJ)
2048 else if (ace->type == SMB_ACL_OTHER) {
2049 /* Last ace - this is "other" */
2054 if (!owner_ace || !other_ace) {
2055 DEBUG(0,("arrange_posix_perms: Invalid POSIX permissions for file %s, missing owner or other.\n",
2061 * The POSIX algorithm applies to owner first, and other last,
2062 * so ensure they are arranged in this order.
2066 DLIST_PROMOTE(list_head, owner_ace);
2070 DLIST_DEMOTE(list_head, other_ace, ace);
2073 /* We have probably changed the head of the list. */
2075 *pp_list_head = list_head;
2078 /****************************************************************************
2079 Create a linked list of canonical ACE entries.
2080 ****************************************************************************/
2082 static canon_ace *canonicalise_acl( files_struct *fsp, SMB_ACL_T posix_acl, SMB_STRUCT_STAT *psbuf,
2083 const DOM_SID *powner, const DOM_SID *pgroup, struct pai_val *pal, SMB_ACL_TYPE_T the_acl_type)
2085 connection_struct *conn = fsp->conn;
2086 mode_t acl_mask = (S_IRUSR|S_IWUSR|S_IXUSR);
2087 canon_ace *list_head = NULL;
2088 canon_ace *ace = NULL;
2089 canon_ace *next_ace = NULL;
2090 int entry_id = SMB_ACL_FIRST_ENTRY;
2091 SMB_ACL_ENTRY_T entry;
2094 while ( posix_acl && (SMB_VFS_SYS_ACL_GET_ENTRY(conn, posix_acl, entry_id, &entry) == 1)) {
2095 SMB_ACL_TAG_T tagtype;
2096 SMB_ACL_PERMSET_T permset;
2099 enum ace_owner owner_type;
2102 if (entry_id == SMB_ACL_FIRST_ENTRY)
2103 entry_id = SMB_ACL_NEXT_ENTRY;
2105 /* Is this a MASK entry ? */
2106 if (SMB_VFS_SYS_ACL_GET_TAG_TYPE(conn, entry, &tagtype) == -1)
2109 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, entry, &permset) == -1)
2112 /* Decide which SID to use based on the ACL type. */
2114 case SMB_ACL_USER_OBJ:
2115 /* Get the SID from the owner. */
2116 sid_copy(&sid, powner);
2117 unix_ug.uid = psbuf->st_uid;
2118 owner_type = UID_ACE;
2122 uid_t *puid = (uid_t *)SMB_VFS_SYS_ACL_GET_QUALIFIER(conn, entry);
2124 DEBUG(0,("canonicalise_acl: Failed to get uid.\n"));
2128 * A SMB_ACL_USER entry for the owner is shadowed by the
2129 * SMB_ACL_USER_OBJ entry and Windows also cannot represent
2130 * that entry, so we ignore it. We also don't create such
2131 * entries out of the blue when setting ACLs, so a get/set
2132 * cycle will drop them.
2134 if (the_acl_type == SMB_ACL_TYPE_ACCESS && *puid == psbuf->st_uid) {
2135 SMB_VFS_SYS_ACL_FREE_QUALIFIER(conn, (void *)puid,tagtype);
2138 uid_to_sid( &sid, *puid);
2139 unix_ug.uid = *puid;
2140 owner_type = UID_ACE;
2141 SMB_VFS_SYS_ACL_FREE_QUALIFIER(conn, (void *)puid,tagtype);
2144 case SMB_ACL_GROUP_OBJ:
2145 /* Get the SID from the owning group. */
2146 sid_copy(&sid, pgroup);
2147 unix_ug.gid = psbuf->st_gid;
2148 owner_type = GID_ACE;
2152 gid_t *pgid = (gid_t *)SMB_VFS_SYS_ACL_GET_QUALIFIER(conn, entry);
2154 DEBUG(0,("canonicalise_acl: Failed to get gid.\n"));
2157 gid_to_sid( &sid, *pgid);
2158 unix_ug.gid = *pgid;
2159 owner_type = GID_ACE;
2160 SMB_VFS_SYS_ACL_FREE_QUALIFIER(conn, (void *)pgid,tagtype);
2164 acl_mask = convert_permset_to_mode_t(conn, permset);
2165 continue; /* Don't count the mask as an entry. */
2167 /* Use the Everyone SID */
2168 sid = global_sid_World;
2170 owner_type = WORLD_ACE;
2173 DEBUG(0,("canonicalise_acl: Unknown tagtype %u\n", (unsigned int)tagtype));
2178 * Add this entry to the list.
2181 if ((ace = SMB_MALLOC_P(canon_ace)) == NULL)
2185 ace->type = tagtype;
2186 ace->perms = convert_permset_to_mode_t(conn, permset);
2187 ace->attr = ALLOW_ACE;
2189 ace->unix_ug = unix_ug;
2190 ace->owner_type = owner_type;
2191 ace->inherited = get_inherited_flag(pal, ace, (the_acl_type == SMB_ACL_TYPE_DEFAULT));
2193 DLIST_ADD(list_head, ace);
2197 * This next call will ensure we have at least a user/group/world set.
2200 if (!ensure_canon_entry_valid(&list_head, fsp, powner, pgroup, psbuf, False))
2204 * Now go through the list, masking the permissions with the
2205 * acl_mask. Ensure all DENY Entries are at the start of the list.
2208 DEBUG(10,("canonicalise_acl: %s ace entries before arrange :\n", the_acl_type == SMB_ACL_TYPE_ACCESS ? "Access" : "Default" ));
2210 for ( ace_count = 0, ace = list_head; ace; ace = next_ace, ace_count++) {
2211 next_ace = ace->next;
2213 /* Masks are only applied to entries other than USER_OBJ and OTHER. */
2214 if (ace->type != SMB_ACL_OTHER && ace->type != SMB_ACL_USER_OBJ)
2215 ace->perms &= acl_mask;
2217 if (ace->perms == 0) {
2218 DLIST_PROMOTE(list_head, ace);
2221 if( DEBUGLVL( 10 ) ) {
2222 print_canon_ace(ace, ace_count);
2226 arrange_posix_perms(fsp->fsp_name,&list_head );
2228 print_canon_ace_list( "canonicalise_acl: ace entries after arrange", list_head );
2234 free_canon_ace_list(list_head);
2238 /****************************************************************************
2239 Check if the current user group list contains a given group.
2240 ****************************************************************************/
2242 static BOOL current_user_in_group(gid_t gid)
2246 for (i = 0; i < current_user.ut.ngroups; i++) {
2247 if (current_user.ut.groups[i] == gid) {
2255 /****************************************************************************
2256 Should we override a deny ? Check deprecated 'acl group control'
2258 ****************************************************************************/
2260 static BOOL acl_group_override(connection_struct *conn, gid_t prim_gid)
2262 if ( (errno == EACCES || errno == EPERM)
2263 && (lp_acl_group_control(SNUM(conn) || lp_dos_filemode(SNUM(conn))))
2264 && current_user_in_group(prim_gid) )
2272 /****************************************************************************
2273 Attempt to apply an ACL to a file or directory.
2274 ****************************************************************************/
2276 static BOOL set_canon_ace_list(files_struct *fsp, canon_ace *the_ace, BOOL default_ace, gid_t prim_gid, BOOL *pacl_set_support)
2278 connection_struct *conn = fsp->conn;
2280 SMB_ACL_T the_acl = SMB_VFS_SYS_ACL_INIT(conn, (int)count_canon_ace_list(the_ace) + 1);
2283 SMB_ACL_ENTRY_T mask_entry;
2284 BOOL got_mask_entry = False;
2285 SMB_ACL_PERMSET_T mask_permset;
2286 SMB_ACL_TYPE_T the_acl_type = (default_ace ? SMB_ACL_TYPE_DEFAULT : SMB_ACL_TYPE_ACCESS);
2287 BOOL needs_mask = False;
2288 mode_t mask_perms = 0;
2290 #if defined(POSIX_ACL_NEEDS_MASK)
2291 /* HP-UX always wants to have a mask (called "class" there). */
2295 if (the_acl == NULL) {
2297 if (!no_acl_syscall_error(errno)) {
2299 * Only print this error message if we have some kind of ACL
2300 * support that's not working. Otherwise we would always get this.
2302 DEBUG(0,("set_canon_ace_list: Unable to init %s ACL. (%s)\n",
2303 default_ace ? "default" : "file", strerror(errno) ));
2305 *pacl_set_support = False;
2309 if( DEBUGLVL( 10 )) {
2310 dbgtext("set_canon_ace_list: setting ACL:\n");
2311 for (i = 0, p_ace = the_ace; p_ace; p_ace = p_ace->next, i++ ) {
2312 print_canon_ace( p_ace, i);
2316 for (i = 0, p_ace = the_ace; p_ace; p_ace = p_ace->next, i++ ) {
2317 SMB_ACL_ENTRY_T the_entry;
2318 SMB_ACL_PERMSET_T the_permset;
2321 * ACLs only "need" an ACL_MASK entry if there are any named user or
2322 * named group entries. But if there is an ACL_MASK entry, it applies
2323 * to ACL_USER, ACL_GROUP, and ACL_GROUP_OBJ entries. Set the mask
2324 * so that it doesn't deny (i.e., mask off) any permissions.
2327 if (p_ace->type == SMB_ACL_USER || p_ace->type == SMB_ACL_GROUP) {
2329 mask_perms |= p_ace->perms;
2330 } else if (p_ace->type == SMB_ACL_GROUP_OBJ) {
2331 mask_perms |= p_ace->perms;
2335 * Get the entry for this ACE.
2338 if (SMB_VFS_SYS_ACL_CREATE_ENTRY(conn, &the_acl, &the_entry) == -1) {
2339 DEBUG(0,("set_canon_ace_list: Failed to create entry %d. (%s)\n",
2340 i, strerror(errno) ));
2344 if (p_ace->type == SMB_ACL_MASK) {
2345 mask_entry = the_entry;
2346 got_mask_entry = True;
2350 * Ok - we now know the ACL calls should be working, don't
2351 * allow fallback to chmod.
2354 *pacl_set_support = True;
2357 * Initialise the entry from the canon_ace.
2361 * First tell the entry what type of ACE this is.
2364 if (SMB_VFS_SYS_ACL_SET_TAG_TYPE(conn, the_entry, p_ace->type) == -1) {
2365 DEBUG(0,("set_canon_ace_list: Failed to set tag type on entry %d. (%s)\n",
2366 i, strerror(errno) ));
2371 * Only set the qualifier (user or group id) if the entry is a user
2375 if ((p_ace->type == SMB_ACL_USER) || (p_ace->type == SMB_ACL_GROUP)) {
2376 if (SMB_VFS_SYS_ACL_SET_QUALIFIER(conn, the_entry,(void *)&p_ace->unix_ug.uid) == -1) {
2377 DEBUG(0,("set_canon_ace_list: Failed to set qualifier on entry %d. (%s)\n",
2378 i, strerror(errno) ));
2384 * Convert the mode_t perms in the canon_ace to a POSIX permset.
2387 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, the_entry, &the_permset) == -1) {
2388 DEBUG(0,("set_canon_ace_list: Failed to get permset on entry %d. (%s)\n",
2389 i, strerror(errno) ));
2393 if (map_acl_perms_to_permset(conn, p_ace->perms, &the_permset) == -1) {
2394 DEBUG(0,("set_canon_ace_list: Failed to create permset for mode (%u) on entry %d. (%s)\n",
2395 (unsigned int)p_ace->perms, i, strerror(errno) ));
2400 * ..and apply them to the entry.
2403 if (SMB_VFS_SYS_ACL_SET_PERMSET(conn, the_entry, the_permset) == -1) {
2404 DEBUG(0,("set_canon_ace_list: Failed to add permset on entry %d. (%s)\n",
2405 i, strerror(errno) ));
2410 print_canon_ace( p_ace, i);
2414 if (needs_mask && !got_mask_entry) {
2415 if (SMB_VFS_SYS_ACL_CREATE_ENTRY(conn, &the_acl, &mask_entry) == -1) {
2416 DEBUG(0,("set_canon_ace_list: Failed to create mask entry. (%s)\n", strerror(errno) ));
2420 if (SMB_VFS_SYS_ACL_SET_TAG_TYPE(conn, mask_entry, SMB_ACL_MASK) == -1) {
2421 DEBUG(0,("set_canon_ace_list: Failed to set tag type on mask entry. (%s)\n",strerror(errno) ));
2425 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, mask_entry, &mask_permset) == -1) {
2426 DEBUG(0,("set_canon_ace_list: Failed to get mask permset. (%s)\n", strerror(errno) ));
2430 if (map_acl_perms_to_permset(conn, S_IRUSR|S_IWUSR|S_IXUSR, &mask_permset) == -1) {
2431 DEBUG(0,("set_canon_ace_list: Failed to create mask permset. (%s)\n", strerror(errno) ));
2435 if (SMB_VFS_SYS_ACL_SET_PERMSET(conn, mask_entry, mask_permset) == -1) {
2436 DEBUG(0,("set_canon_ace_list: Failed to add mask permset. (%s)\n", strerror(errno) ));
2442 * Finally apply it to the file or directory.
2445 if(default_ace || fsp->is_directory || fsp->fh->fd == -1) {
2446 if (SMB_VFS_SYS_ACL_SET_FILE(conn, fsp->fsp_name, the_acl_type, the_acl) == -1) {
2448 * Some systems allow all the above calls and only fail with no ACL support
2449 * when attempting to apply the acl. HPUX with HFS is an example of this. JRA.
2451 if (no_acl_syscall_error(errno)) {
2452 *pacl_set_support = False;
2455 if (acl_group_override(conn, prim_gid)) {
2458 DEBUG(5,("set_canon_ace_list: acl group control on and current user in file %s primary group.\n",
2462 sret = SMB_VFS_SYS_ACL_SET_FILE(conn, fsp->fsp_name, the_acl_type, the_acl);
2470 DEBUG(2,("set_canon_ace_list: sys_acl_set_file type %s failed for file %s (%s).\n",
2471 the_acl_type == SMB_ACL_TYPE_DEFAULT ? "directory default" : "file",
2472 fsp->fsp_name, strerror(errno) ));
2477 if (SMB_VFS_SYS_ACL_SET_FD(fsp, fsp->fh->fd, the_acl) == -1) {
2479 * Some systems allow all the above calls and only fail with no ACL support
2480 * when attempting to apply the acl. HPUX with HFS is an example of this. JRA.
2482 if (no_acl_syscall_error(errno)) {
2483 *pacl_set_support = False;
2486 if (acl_group_override(conn, prim_gid)) {
2489 DEBUG(5,("set_canon_ace_list: acl group control on and current user in file %s primary group.\n",
2493 sret = SMB_VFS_SYS_ACL_SET_FD(fsp, fsp->fh->fd, the_acl);
2501 DEBUG(2,("set_canon_ace_list: sys_acl_set_file failed for file %s (%s).\n",
2502 fsp->fsp_name, strerror(errno) ));
2512 if (the_acl != NULL) {
2513 SMB_VFS_SYS_ACL_FREE_ACL(conn, the_acl);
2519 /****************************************************************************
2520 Find a particular canon_ace entry.
2521 ****************************************************************************/
2523 static struct canon_ace *canon_ace_entry_for(struct canon_ace *list, SMB_ACL_TAG_T type, posix_id *id)
2526 if (list->type == type && ((type != SMB_ACL_USER && type != SMB_ACL_GROUP) ||
2527 (type == SMB_ACL_USER && id && id->uid == list->unix_ug.uid) ||
2528 (type == SMB_ACL_GROUP && id && id->gid == list->unix_ug.gid)))
2535 /****************************************************************************
2537 ****************************************************************************/
2539 SMB_ACL_T free_empty_sys_acl(connection_struct *conn, SMB_ACL_T the_acl)
2541 SMB_ACL_ENTRY_T entry;
2545 if (SMB_VFS_SYS_ACL_GET_ENTRY(conn, the_acl, SMB_ACL_FIRST_ENTRY, &entry) != 1) {
2546 SMB_VFS_SYS_ACL_FREE_ACL(conn, the_acl);
2552 /****************************************************************************
2553 Convert a canon_ace to a generic 3 element permission - if possible.
2554 ****************************************************************************/
2556 #define MAP_PERM(p,mask,result) (((p) & (mask)) ? (result) : 0 )
2558 static BOOL convert_canon_ace_to_posix_perms( files_struct *fsp, canon_ace *file_ace_list, mode_t *posix_perms)
2560 int snum = SNUM(fsp->conn);
2561 size_t ace_count = count_canon_ace_list(file_ace_list);
2563 canon_ace *owner_ace = NULL;
2564 canon_ace *group_ace = NULL;
2565 canon_ace *other_ace = NULL;
2569 if (ace_count != 3) {
2570 DEBUG(3,("convert_canon_ace_to_posix_perms: Too many ACE entries for file %s to convert to \
2571 posix perms.\n", fsp->fsp_name ));
2575 for (ace_p = file_ace_list; ace_p; ace_p = ace_p->next) {
2576 if (ace_p->owner_type == UID_ACE)
2578 else if (ace_p->owner_type == GID_ACE)
2580 else if (ace_p->owner_type == WORLD_ACE)
2584 if (!owner_ace || !group_ace || !other_ace) {
2585 DEBUG(3,("convert_canon_ace_to_posix_perms: Can't get standard entries for file %s.\n",
2590 *posix_perms = (mode_t)0;
2592 *posix_perms |= owner_ace->perms;
2593 *posix_perms |= MAP_PERM(group_ace->perms, S_IRUSR, S_IRGRP);
2594 *posix_perms |= MAP_PERM(group_ace->perms, S_IWUSR, S_IWGRP);
2595 *posix_perms |= MAP_PERM(group_ace->perms, S_IXUSR, S_IXGRP);
2596 *posix_perms |= MAP_PERM(other_ace->perms, S_IRUSR, S_IROTH);
2597 *posix_perms |= MAP_PERM(other_ace->perms, S_IWUSR, S_IWOTH);
2598 *posix_perms |= MAP_PERM(other_ace->perms, S_IXUSR, S_IXOTH);
2600 /* The owner must have at least read access. */
2602 *posix_perms |= S_IRUSR;
2603 if (fsp->is_directory)
2604 *posix_perms |= (S_IWUSR|S_IXUSR);
2606 /* If requested apply the masks. */
2608 /* Get the initial bits to apply. */
2610 if (fsp->is_directory) {
2611 and_bits = lp_dir_security_mask(snum);
2612 or_bits = lp_force_dir_security_mode(snum);
2614 and_bits = lp_security_mask(snum);
2615 or_bits = lp_force_security_mode(snum);
2618 *posix_perms = (((*posix_perms) & and_bits)|or_bits);
2620 DEBUG(10,("convert_canon_ace_to_posix_perms: converted u=%o,g=%o,w=%o to perm=0%o for file %s.\n",
2621 (int)owner_ace->perms, (int)group_ace->perms, (int)other_ace->perms, (int)*posix_perms,
2627 /****************************************************************************
2628 Incoming NT ACLs on a directory can be split into a default POSIX acl (CI|OI|IO) and
2629 a normal POSIX acl. Win2k needs these split acls re-merging into one ACL
2630 with CI|OI set so it is inherited and also applies to the directory.
2631 Based on code from "Jim McDonough" <jmcd@us.ibm.com>.
2632 ****************************************************************************/
2634 static size_t merge_default_aces( SEC_ACE *nt_ace_list, size_t num_aces)
2638 for (i = 0; i < num_aces; i++) {
2639 for (j = i+1; j < num_aces; j++) {
2640 uint32 i_flags_ni = (nt_ace_list[i].flags & ~SEC_ACE_FLAG_INHERITED_ACE);
2641 uint32 j_flags_ni = (nt_ace_list[j].flags & ~SEC_ACE_FLAG_INHERITED_ACE);
2642 BOOL i_inh = (nt_ace_list[i].flags & SEC_ACE_FLAG_INHERITED_ACE) ? True : False;
2643 BOOL j_inh = (nt_ace_list[j].flags & SEC_ACE_FLAG_INHERITED_ACE) ? True : False;
2645 /* We know the lower number ACE's are file entries. */
2646 if ((nt_ace_list[i].type == nt_ace_list[j].type) &&
2647 (nt_ace_list[i].size == nt_ace_list[j].size) &&
2648 (nt_ace_list[i].info.mask == nt_ace_list[j].info.mask) &&
2649 sid_equal(&nt_ace_list[i].trustee, &nt_ace_list[j].trustee) &&
2651 (i_flags_ni == 0) &&
2652 (j_flags_ni == (SEC_ACE_FLAG_OBJECT_INHERIT|
2653 SEC_ACE_FLAG_CONTAINER_INHERIT|
2654 SEC_ACE_FLAG_INHERIT_ONLY))) {
2656 * W2K wants to have access allowed zero access ACE's
2657 * at the end of the list. If the mask is zero, merge
2658 * the non-inherited ACE onto the inherited ACE.
2661 if (nt_ace_list[i].info.mask == 0) {
2662 nt_ace_list[j].flags = SEC_ACE_FLAG_OBJECT_INHERIT|SEC_ACE_FLAG_CONTAINER_INHERIT|
2663 (i_inh ? SEC_ACE_FLAG_INHERITED_ACE : 0);
2664 if (num_aces - i - 1 > 0)
2665 memmove(&nt_ace_list[i], &nt_ace_list[i+1], (num_aces-i-1) *
2668 DEBUG(10,("merge_default_aces: Merging zero access ACE %u onto ACE %u.\n",
2669 (unsigned int)i, (unsigned int)j ));
2672 * These are identical except for the flags.
2673 * Merge the inherited ACE onto the non-inherited ACE.
2676 nt_ace_list[i].flags = SEC_ACE_FLAG_OBJECT_INHERIT|SEC_ACE_FLAG_CONTAINER_INHERIT|
2677 (i_inh ? SEC_ACE_FLAG_INHERITED_ACE : 0);
2678 if (num_aces - j - 1 > 0)
2679 memmove(&nt_ace_list[j], &nt_ace_list[j+1], (num_aces-j-1) *
2682 DEBUG(10,("merge_default_aces: Merging ACE %u onto ACE %u.\n",
2683 (unsigned int)j, (unsigned int)i ));
2693 /****************************************************************************
2694 Reply to query a security descriptor from an fsp. If it succeeds it allocates
2695 the space for the return elements and returns the size needed to return the
2696 security descriptor. This should be the only external function needed for
2697 the UNIX style get ACL.
2698 ****************************************************************************/
2700 size_t get_nt_acl(files_struct *fsp, uint32 security_info, SEC_DESC **ppdesc)
2702 connection_struct *conn = fsp->conn;
2703 SMB_STRUCT_STAT sbuf;
2704 SEC_ACE *nt_ace_list = NULL;
2708 SEC_ACL *psa = NULL;
2709 size_t num_acls = 0;
2710 size_t num_def_acls = 0;
2711 size_t num_aces = 0;
2712 SMB_ACL_T posix_acl = NULL;
2713 SMB_ACL_T def_acl = NULL;
2714 canon_ace *file_ace = NULL;
2715 canon_ace *dir_ace = NULL;
2716 size_t num_profile_acls = 0;
2717 struct pai_val *pal = NULL;
2718 SEC_DESC *psd = NULL;
2722 DEBUG(10,("get_nt_acl: called for file %s\n", fsp->fsp_name ));
2724 if(fsp->is_directory || fsp->fh->fd == -1) {
2726 /* Get the stat struct for the owner info. */
2727 if(SMB_VFS_STAT(fsp->conn,fsp->fsp_name, &sbuf) != 0) {
2731 * Get the ACL from the path.
2734 posix_acl = SMB_VFS_SYS_ACL_GET_FILE(conn, fsp->fsp_name, SMB_ACL_TYPE_ACCESS);
2737 * If it's a directory get the default POSIX ACL.
2740 if(fsp->is_directory) {
2741 def_acl = SMB_VFS_SYS_ACL_GET_FILE(conn, fsp->fsp_name, SMB_ACL_TYPE_DEFAULT);
2742 def_acl = free_empty_sys_acl(conn, def_acl);
2747 /* Get the stat struct for the owner info. */
2748 if(SMB_VFS_FSTAT(fsp,fsp->fh->fd,&sbuf) != 0) {
2752 * Get the ACL from the fd.
2754 posix_acl = SMB_VFS_SYS_ACL_GET_FD(fsp, fsp->fh->fd);
2757 DEBUG(5,("get_nt_acl : file ACL %s, directory ACL %s\n",
2758 posix_acl ? "present" : "absent",
2759 def_acl ? "present" : "absent" ));
2761 pal = load_inherited_info(fsp);
2764 * Get the owner, group and world SIDs.
2767 if (lp_profile_acls(SNUM(conn))) {
2768 /* For WXP SP1 the owner must be administrators. */
2769 sid_copy(&owner_sid, &global_sid_Builtin_Administrators);
2770 sid_copy(&group_sid, &global_sid_Builtin_Users);
2771 num_profile_acls = 2;
2773 create_file_sids(&sbuf, &owner_sid, &group_sid);
2776 if ((security_info & DACL_SECURITY_INFORMATION) && !(security_info & PROTECTED_DACL_SECURITY_INFORMATION)) {
2779 * In the optimum case Creator Owner and Creator Group would be used for
2780 * the ACL_USER_OBJ and ACL_GROUP_OBJ entries, respectively, but this
2781 * would lead to usability problems under Windows: The Creator entries
2782 * are only available in browse lists of directories and not for files;
2783 * additionally the identity of the owning group couldn't be determined.
2784 * We therefore use those identities only for Default ACLs.
2787 /* Create the canon_ace lists. */
2788 file_ace = canonicalise_acl( fsp, posix_acl, &sbuf, &owner_sid, &group_sid, pal, SMB_ACL_TYPE_ACCESS );
2790 /* We must have *some* ACLS. */
2792 if (count_canon_ace_list(file_ace) == 0) {
2793 DEBUG(0,("get_nt_acl : No ACLs on file (%s) !\n", fsp->fsp_name ));
2797 if (fsp->is_directory && def_acl) {
2798 dir_ace = canonicalise_acl(fsp, def_acl, &sbuf,
2799 &global_sid_Creator_Owner,
2800 &global_sid_Creator_Group, pal, SMB_ACL_TYPE_DEFAULT );
2804 * Create the NT ACE list from the canonical ace lists.
2812 if (nt4_compatible_acls() && dir_ace) {
2814 * NT 4 chokes if an ACL contains an INHERIT_ONLY entry
2815 * but no non-INHERIT_ONLY entry for one SID. So we only
2816 * remove entries from the Access ACL if the
2817 * corresponding Default ACL entries have also been
2818 * removed. ACEs for CREATOR-OWNER and CREATOR-GROUP
2819 * are exceptions. We can do nothing
2820 * intelligent if the Default ACL contains entries that
2821 * are not also contained in the Access ACL, so this
2822 * case will still fail under NT 4.
2825 ace = canon_ace_entry_for(dir_ace, SMB_ACL_OTHER, NULL);
2826 if (ace && !ace->perms) {
2827 DLIST_REMOVE(dir_ace, ace);
2830 ace = canon_ace_entry_for(file_ace, SMB_ACL_OTHER, NULL);
2831 if (ace && !ace->perms) {
2832 DLIST_REMOVE(file_ace, ace);
2838 * WinNT doesn't usually have Creator Group
2839 * in browse lists, so we send this entry to
2840 * WinNT even if it contains no relevant
2841 * permissions. Once we can add
2842 * Creator Group to browse lists we can
2847 ace = canon_ace_entry_for(dir_ace, SMB_ACL_GROUP_OBJ, NULL);
2848 if (ace && !ace->perms) {
2849 DLIST_REMOVE(dir_ace, ace);
2854 ace = canon_ace_entry_for(file_ace, SMB_ACL_GROUP_OBJ, NULL);
2855 if (ace && !ace->perms) {
2856 DLIST_REMOVE(file_ace, ace);
2861 num_acls = count_canon_ace_list(file_ace);
2862 num_def_acls = count_canon_ace_list(dir_ace);
2864 /* Allocate the ace list. */
2865 if ((nt_ace_list = SMB_MALLOC_ARRAY(SEC_ACE,num_acls + num_profile_acls + num_def_acls)) == NULL) {
2866 DEBUG(0,("get_nt_acl: Unable to malloc space for nt_ace_list.\n"));
2870 memset(nt_ace_list, '\0', (num_acls + num_def_acls) * sizeof(SEC_ACE) );
2873 * Create the NT ACE list from the canonical ace lists.
2878 for (i = 0; i < num_acls; i++, ace = ace->next) {
2881 acc = map_canon_ace_perms(SNUM(conn), &nt_acl_type, &owner_sid, ace, fsp->is_directory);
2882 init_sec_ace(&nt_ace_list[num_aces++], &ace->trustee, nt_acl_type, acc, ace->inherited ? SEC_ACE_FLAG_INHERITED_ACE : 0);
2885 /* The User must have access to a profile share - even if we can't map the SID. */
2886 if (lp_profile_acls(SNUM(conn))) {
2889 init_sec_access(&acc,FILE_GENERIC_ALL);
2890 init_sec_ace(&nt_ace_list[num_aces++], &global_sid_Builtin_Users, SEC_ACE_TYPE_ACCESS_ALLOWED,
2896 for (i = 0; i < num_def_acls; i++, ace = ace->next) {
2899 acc = map_canon_ace_perms(SNUM(conn), &nt_acl_type, &owner_sid, ace, fsp->is_directory);
2900 init_sec_ace(&nt_ace_list[num_aces++], &ace->trustee, nt_acl_type, acc,
2901 SEC_ACE_FLAG_OBJECT_INHERIT|SEC_ACE_FLAG_CONTAINER_INHERIT|
2902 SEC_ACE_FLAG_INHERIT_ONLY|
2903 (ace->inherited ? SEC_ACE_FLAG_INHERITED_ACE : 0));
2906 /* The User must have access to a profile share - even if we can't map the SID. */
2907 if (lp_profile_acls(SNUM(conn))) {
2910 init_sec_access(&acc,FILE_GENERIC_ALL);
2911 init_sec_ace(&nt_ace_list[num_aces++], &global_sid_Builtin_Users, SEC_ACE_TYPE_ACCESS_ALLOWED, acc,
2912 SEC_ACE_FLAG_OBJECT_INHERIT|SEC_ACE_FLAG_CONTAINER_INHERIT|
2913 SEC_ACE_FLAG_INHERIT_ONLY|0);
2917 * Merge POSIX default ACLs and normal ACLs into one NT ACE.
2918 * Win2K needs this to get the inheritance correct when replacing ACLs
2919 * on a directory tree. Based on work by Jim @ IBM.
2922 num_aces = merge_default_aces(nt_ace_list, num_aces);
2927 if((psa = make_sec_acl( main_loop_talloc_get(), NT4_ACL_REVISION, num_aces, nt_ace_list)) == NULL) {
2928 DEBUG(0,("get_nt_acl: Unable to malloc space for acl.\n"));
2932 } /* security_info & DACL_SECURITY_INFORMATION */
2934 psd = make_standard_sec_desc( main_loop_talloc_get(),
2935 (security_info & OWNER_SECURITY_INFORMATION) ? &owner_sid : NULL,
2936 (security_info & GROUP_SECURITY_INFORMATION) ? &group_sid : NULL,
2941 DEBUG(0,("get_nt_acl: Unable to malloc space for security descriptor.\n"));
2947 * Windows 2000: The DACL_PROTECTED flag in the security
2948 * descriptor marks the ACL as non-inheriting, i.e., no
2949 * ACEs from higher level directories propagate to this
2950 * ACL. In the POSIX ACL model permissions are only
2951 * inherited at file create time, so ACLs never contain
2952 * any ACEs that are inherited dynamically. The DACL_PROTECTED
2953 * flag doesn't seem to bother Windows NT.
2954 * Always set this if map acl inherit is turned off.
2956 if (get_protected_flag(pal) || !lp_map_acl_inherit(SNUM(conn))) {
2957 psd->type |= SE_DESC_DACL_PROTECTED;
2961 dacl_sort_into_canonical_order(psd->dacl->ace, (unsigned int)psd->dacl->num_aces);
2969 SMB_VFS_SYS_ACL_FREE_ACL(conn, posix_acl);
2972 SMB_VFS_SYS_ACL_FREE_ACL(conn, def_acl);
2974 free_canon_ace_list(file_ace);
2975 free_canon_ace_list(dir_ace);
2976 free_inherited_info(pal);
2977 SAFE_FREE(nt_ace_list);
2982 /****************************************************************************
2983 Try to chown a file. We will be able to chown it under the following conditions.
2985 1) If we have root privileges, then it will just work.
2986 2) If we have SeTakeOwnershipPrivilege we can change the user to the current user.
2987 3) If we have SeRestorePrivilege we can change the user to any other user.
2988 4) If we have write permission to the file and dos_filemodes is set
2989 then allow chown to the currently authenticated user.
2990 ****************************************************************************/
2992 static int try_chown(connection_struct *conn, const char *fname, uid_t uid, gid_t gid)
2998 if(!CAN_WRITE(conn)) {
3003 /* try the direct way first */
3004 ret = SMB_VFS_CHOWN(conn, fname, uid, gid);
3008 /* Case (2) / (3) */
3009 if (lp_enable_privileges()) {
3011 BOOL has_take_ownership_priv = user_has_privileges(current_user.nt_user_token,
3012 &se_take_ownership);
3013 BOOL has_restore_priv = user_has_privileges(current_user.nt_user_token,
3017 if ( ( has_take_ownership_priv && ( uid == current_user.ut.uid ) ) ||
3019 ( has_restore_priv ) ) {
3022 /* Keep the current file gid the same - take ownership doesn't imply group change. */
3023 ret = SMB_VFS_CHOWN(conn, fname, uid, (gid_t)-1);
3030 if (!lp_dos_filemode(SNUM(conn))) {
3034 if (SMB_VFS_STAT(conn,fname,&st)) {
3038 if (!NT_STATUS_IS_OK(open_file_fchmod(conn,fname,&st,&fsp))) {
3042 /* only allow chown to the current user. This is more secure,
3043 and also copes with the case where the SID in a take ownership ACL is
3044 a local SID on the users workstation
3046 uid = current_user.ut.uid;
3049 /* Keep the current file gid the same. */
3050 ret = SMB_VFS_FCHOWN(fsp, fsp->fh->fd, uid, (gid_t)-1);
3053 close_file_fchmod(fsp);
3058 /****************************************************************************
3059 Reply to set a security descriptor on an fsp. security_info_sent is the
3060 description of the following NT ACL.
3061 This should be the only external function needed for the UNIX style set ACL.
3062 ****************************************************************************/
3064 BOOL set_nt_acl(files_struct *fsp, uint32 security_info_sent, SEC_DESC *psd)
3066 connection_struct *conn = fsp->conn;
3067 uid_t user = (uid_t)-1;
3068 gid_t grp = (gid_t)-1;
3069 SMB_STRUCT_STAT sbuf;
3070 DOM_SID file_owner_sid;
3071 DOM_SID file_grp_sid;
3072 canon_ace *file_ace_list = NULL;
3073 canon_ace *dir_ace_list = NULL;
3074 BOOL acl_perms = False;
3075 mode_t orig_mode = (mode_t)0;
3078 BOOL need_chown = False;
3080 DEBUG(10,("set_nt_acl: called for file %s\n", fsp->fsp_name ));
3082 if (!CAN_WRITE(conn)) {
3083 DEBUG(10,("set acl rejected on read-only share\n"));
3088 * Get the current state of the file.
3091 if(fsp->is_directory || fsp->fh->fd == -1) {
3092 if(SMB_VFS_STAT(fsp->conn,fsp->fsp_name, &sbuf) != 0)
3095 if(SMB_VFS_FSTAT(fsp,fsp->fh->fd,&sbuf) != 0)
3099 /* Save the original elements we check against. */
3100 orig_mode = sbuf.st_mode;
3101 orig_uid = sbuf.st_uid;
3102 orig_gid = sbuf.st_gid;
3105 * Unpack the user/group/world id's.
3108 if (!unpack_nt_owners( SNUM(conn), &sbuf, &user, &grp, security_info_sent, psd)) {
3113 * Do we need to chown ?
3116 if (((user != (uid_t)-1) && (orig_uid != user)) || (( grp != (gid_t)-1) && (orig_gid != grp))) {
3121 * Chown before setting ACL only if we don't change the user, or
3122 * if we change to the current user, but not if we want to give away
3126 if (need_chown && (user == (uid_t)-1 || user == current_user.ut.uid)) {
3128 DEBUG(3,("set_nt_acl: chown %s. uid = %u, gid = %u.\n",
3129 fsp->fsp_name, (unsigned int)user, (unsigned int)grp ));
3131 if(try_chown( fsp->conn, fsp->fsp_name, user, grp) == -1) {
3132 DEBUG(3,("set_nt_acl: chown %s, %u, %u failed. Error = %s.\n",
3133 fsp->fsp_name, (unsigned int)user, (unsigned int)grp, strerror(errno) ));
3138 * Recheck the current state of the file, which may have changed.
3139 * (suid/sgid bits, for instance)
3142 if(fsp->is_directory) {
3143 if(SMB_VFS_STAT(fsp->conn, fsp->fsp_name, &sbuf) != 0) {
3150 if(fsp->fh->fd == -1)
3151 ret = SMB_VFS_STAT(fsp->conn, fsp->fsp_name, &sbuf);
3153 ret = SMB_VFS_FSTAT(fsp,fsp->fh->fd,&sbuf);
3159 /* Save the original elements we check against. */
3160 orig_mode = sbuf.st_mode;
3161 orig_uid = sbuf.st_uid;
3162 orig_gid = sbuf.st_gid;
3164 /* We did it, don't try again */
3168 create_file_sids(&sbuf, &file_owner_sid, &file_grp_sid);
3170 acl_perms = unpack_canon_ace( fsp, &sbuf, &file_owner_sid, &file_grp_sid,
3171 &file_ace_list, &dir_ace_list, security_info_sent, psd);
3173 /* Ignore W2K traverse DACL set. */
3174 if (file_ace_list || dir_ace_list) {
3177 DEBUG(3,("set_nt_acl: cannot set permissions\n"));
3178 free_canon_ace_list(file_ace_list);
3179 free_canon_ace_list(dir_ace_list);
3184 * Only change security if we got a DACL.
3187 if((security_info_sent & DACL_SECURITY_INFORMATION) && (psd->dacl != NULL)) {
3189 BOOL acl_set_support = False;
3193 * Try using the POSIX ACL set first. Fall back to chmod if
3194 * we have no ACL support on this filesystem.
3197 if (acl_perms && file_ace_list) {
3198 ret = set_canon_ace_list(fsp, file_ace_list, False, sbuf.st_gid, &acl_set_support);
3199 if (acl_set_support && ret == False) {
3200 DEBUG(3,("set_nt_acl: failed to set file acl on file %s (%s).\n", fsp->fsp_name, strerror(errno) ));
3201 free_canon_ace_list(file_ace_list);
3202 free_canon_ace_list(dir_ace_list);
3207 if (acl_perms && acl_set_support && fsp->is_directory) {
3209 if (!set_canon_ace_list(fsp, dir_ace_list, True, sbuf.st_gid, &acl_set_support)) {
3210 DEBUG(3,("set_nt_acl: failed to set default acl on directory %s (%s).\n", fsp->fsp_name, strerror(errno) ));
3211 free_canon_ace_list(file_ace_list);
3212 free_canon_ace_list(dir_ace_list);
3218 * No default ACL - delete one if it exists.
3221 if (SMB_VFS_SYS_ACL_DELETE_DEF_FILE(conn, fsp->fsp_name) == -1) {
3224 if (acl_group_override(conn, sbuf.st_gid)) {
3225 DEBUG(5,("set_nt_acl: acl group control on and "
3226 "current user in file %s primary group. Override delete_def_acl\n",
3230 sret = SMB_VFS_SYS_ACL_DELETE_DEF_FILE(conn, fsp->fsp_name);
3235 DEBUG(3,("set_nt_acl: sys_acl_delete_def_file failed (%s)\n", strerror(errno)));
3236 free_canon_ace_list(file_ace_list);
3237 free_canon_ace_list(dir_ace_list);
3244 if (acl_set_support) {
3245 store_inheritance_attributes(fsp, file_ace_list, dir_ace_list,
3246 (psd->type & SE_DESC_DACL_PROTECTED) ? True : False);
3250 * If we cannot set using POSIX ACLs we fall back to checking if we need to chmod.
3253 if(!acl_set_support && acl_perms) {
3256 if (!convert_canon_ace_to_posix_perms( fsp, file_ace_list, &posix_perms)) {
3257 free_canon_ace_list(file_ace_list);
3258 free_canon_ace_list(dir_ace_list);
3259 DEBUG(3,("set_nt_acl: failed to convert file acl to posix permissions for file %s.\n",
3264 if (orig_mode != posix_perms) {
3266 DEBUG(3,("set_nt_acl: chmod %s. perms = 0%o.\n",
3267 fsp->fsp_name, (unsigned int)posix_perms ));
3269 if(SMB_VFS_CHMOD(conn,fsp->fsp_name, posix_perms) == -1) {
3271 if (acl_group_override(conn, sbuf.st_gid)) {
3272 DEBUG(5,("set_nt_acl: acl group control on and "
3273 "current user in file %s primary group. Override chmod\n",
3277 sret = SMB_VFS_CHMOD(conn,fsp->fsp_name, posix_perms);
3282 DEBUG(3,("set_nt_acl: chmod %s, 0%o failed. Error = %s.\n",
3283 fsp->fsp_name, (unsigned int)posix_perms, strerror(errno) ));
3284 free_canon_ace_list(file_ace_list);
3285 free_canon_ace_list(dir_ace_list);
3293 free_canon_ace_list(file_ace_list);
3294 free_canon_ace_list(dir_ace_list);
3297 /* Any chown pending? */
3300 DEBUG(3,("set_nt_acl: chown %s. uid = %u, gid = %u.\n",
3301 fsp->fsp_name, (unsigned int)user, (unsigned int)grp ));
3303 if(try_chown( fsp->conn, fsp->fsp_name, user, grp) == -1) {
3304 DEBUG(3,("set_nt_acl: chown %s, %u, %u failed. Error = %s.\n",
3305 fsp->fsp_name, (unsigned int)user, (unsigned int)grp, strerror(errno) ));
3313 /****************************************************************************
3314 Get the actual group bits stored on a file with an ACL. Has no effect if
3315 the file has no ACL. Needed in dosmode code where the stat() will return
3316 the mask bits, not the real group bits, for a file with an ACL.
3317 ****************************************************************************/
3319 int get_acl_group_bits( connection_struct *conn, const char *fname, mode_t *mode )
3321 int entry_id = SMB_ACL_FIRST_ENTRY;
3322 SMB_ACL_ENTRY_T entry;
3323 SMB_ACL_T posix_acl;
3326 posix_acl = SMB_VFS_SYS_ACL_GET_FILE(conn, fname, SMB_ACL_TYPE_ACCESS);
3327 if (posix_acl == (SMB_ACL_T)NULL)
3330 while (SMB_VFS_SYS_ACL_GET_ENTRY(conn, posix_acl, entry_id, &entry) == 1) {
3331 SMB_ACL_TAG_T tagtype;
3332 SMB_ACL_PERMSET_T permset;
3335 if (entry_id == SMB_ACL_FIRST_ENTRY)
3336 entry_id = SMB_ACL_NEXT_ENTRY;
3338 if (SMB_VFS_SYS_ACL_GET_TAG_TYPE(conn, entry, &tagtype) ==-1)
3341 if (tagtype == SMB_ACL_GROUP_OBJ) {
3342 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, entry, &permset) == -1) {
3345 *mode &= ~(S_IRGRP|S_IWGRP|S_IXGRP);
3346 *mode |= (SMB_VFS_SYS_ACL_GET_PERM(conn, permset, SMB_ACL_READ) ? S_IRGRP : 0);
3347 *mode |= (SMB_VFS_SYS_ACL_GET_PERM(conn, permset, SMB_ACL_WRITE) ? S_IWGRP : 0);
3348 *mode |= (SMB_VFS_SYS_ACL_GET_PERM(conn, permset, SMB_ACL_EXECUTE) ? S_IXGRP : 0);
3354 SMB_VFS_SYS_ACL_FREE_ACL(conn, posix_acl);
3358 /****************************************************************************
3359 Do a chmod by setting the ACL USER_OBJ, GROUP_OBJ and OTHER bits in an ACL
3360 and set the mask to rwx. Needed to preserve complex ACLs set by NT.
3361 ****************************************************************************/
3363 static int chmod_acl_internals( connection_struct *conn, SMB_ACL_T posix_acl, mode_t mode)
3365 int entry_id = SMB_ACL_FIRST_ENTRY;
3366 SMB_ACL_ENTRY_T entry;
3367 int num_entries = 0;
3369 while ( SMB_VFS_SYS_ACL_GET_ENTRY(conn, posix_acl, entry_id, &entry) == 1) {
3370 SMB_ACL_TAG_T tagtype;
3371 SMB_ACL_PERMSET_T permset;
3375 if (entry_id == SMB_ACL_FIRST_ENTRY)
3376 entry_id = SMB_ACL_NEXT_ENTRY;
3378 if (SMB_VFS_SYS_ACL_GET_TAG_TYPE(conn, entry, &tagtype) == -1)
3381 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, entry, &permset) == -1)
3387 case SMB_ACL_USER_OBJ:
3388 perms = unix_perms_to_acl_perms(mode, S_IRUSR, S_IWUSR, S_IXUSR);
3390 case SMB_ACL_GROUP_OBJ:
3391 perms = unix_perms_to_acl_perms(mode, S_IRGRP, S_IWGRP, S_IXGRP);
3395 * FIXME: The ACL_MASK entry permissions should really be set to
3396 * the union of the permissions of all ACL_USER,
3397 * ACL_GROUP_OBJ, and ACL_GROUP entries. That's what
3398 * acl_calc_mask() does, but Samba ACLs doesn't provide it.
3400 perms = S_IRUSR|S_IWUSR|S_IXUSR;
3403 perms = unix_perms_to_acl_perms(mode, S_IROTH, S_IWOTH, S_IXOTH);
3409 if (map_acl_perms_to_permset(conn, perms, &permset) == -1)
3412 if (SMB_VFS_SYS_ACL_SET_PERMSET(conn, entry, permset) == -1)
3417 * If this is a simple 3 element ACL or no elements then it's a standard
3418 * UNIX permission set. Just use chmod...
3421 if ((num_entries == 3) || (num_entries == 0))
3427 /****************************************************************************
3428 Get the access ACL of FROM, do a chmod by setting the ACL USER_OBJ,
3429 GROUP_OBJ and OTHER bits in an ACL and set the mask to rwx. Set the
3430 resulting ACL on TO. Note that name is in UNIX character set.
3431 ****************************************************************************/
3433 static int copy_access_acl(connection_struct *conn, const char *from, const char *to, mode_t mode)
3435 SMB_ACL_T posix_acl = NULL;
3438 if ((posix_acl = SMB_VFS_SYS_ACL_GET_FILE(conn, from, SMB_ACL_TYPE_ACCESS)) == NULL)
3441 if ((ret = chmod_acl_internals(conn, posix_acl, mode)) == -1)
3444 ret = SMB_VFS_SYS_ACL_SET_FILE(conn, to, SMB_ACL_TYPE_ACCESS, posix_acl);
3448 SMB_VFS_SYS_ACL_FREE_ACL(conn, posix_acl);
3452 /****************************************************************************
3453 Do a chmod by setting the ACL USER_OBJ, GROUP_OBJ and OTHER bits in an ACL
3454 and set the mask to rwx. Needed to preserve complex ACLs set by NT.
3455 Note that name is in UNIX character set.
3456 ****************************************************************************/
3458 int chmod_acl(connection_struct *conn, const char *name, mode_t mode)
3460 return copy_access_acl(conn, name, name, mode);
3463 /****************************************************************************
3464 If "inherit permissions" is set and the parent directory has no default
3465 ACL but it does have an Access ACL, inherit this Access ACL to file name.
3466 ****************************************************************************/
3468 int inherit_access_acl(connection_struct *conn, const char *name, mode_t mode)
3471 pstrcpy(dirname, parent_dirname(name));
3473 if (!lp_inherit_perms(SNUM(conn)) || directory_has_default_acl(conn, dirname))
3476 return copy_access_acl(conn, dirname, name, mode);
3479 /****************************************************************************
3480 Do an fchmod by setting the ACL USER_OBJ, GROUP_OBJ and OTHER bits in an ACL
3481 and set the mask to rwx. Needed to preserve complex ACLs set by NT.
3482 ****************************************************************************/
3484 int fchmod_acl(files_struct *fsp, int fd, mode_t mode)
3486 connection_struct *conn = fsp->conn;
3487 SMB_ACL_T posix_acl = NULL;
3490 if ((posix_acl = SMB_VFS_SYS_ACL_GET_FD(fsp, fd)) == NULL)
3493 if ((ret = chmod_acl_internals(conn, posix_acl, mode)) == -1)
3496 ret = SMB_VFS_SYS_ACL_SET_FD(fsp, fd, posix_acl);
3500 SMB_VFS_SYS_ACL_FREE_ACL(conn, posix_acl);
3504 /****************************************************************************
3505 Check for an existing default POSIX ACL on a directory.
3506 ****************************************************************************/
3508 BOOL directory_has_default_acl(connection_struct *conn, const char *fname)
3510 SMB_ACL_T def_acl = SMB_VFS_SYS_ACL_GET_FILE( conn, fname, SMB_ACL_TYPE_DEFAULT);
3511 BOOL has_acl = False;
3512 SMB_ACL_ENTRY_T entry;
3514 if (def_acl != NULL && (SMB_VFS_SYS_ACL_GET_ENTRY(conn, def_acl, SMB_ACL_FIRST_ENTRY, &entry) == 1)) {
3519 SMB_VFS_SYS_ACL_FREE_ACL(conn, def_acl);
3524 /****************************************************************************
3525 Map from wire type to permset.
3526 ****************************************************************************/
3528 static BOOL unix_ex_wire_to_permset(connection_struct *conn, unsigned char wire_perm, SMB_ACL_PERMSET_T *p_permset)
3530 if (wire_perm & ~(SMB_POSIX_ACL_READ|SMB_POSIX_ACL_WRITE|SMB_POSIX_ACL_EXECUTE)) {
3534 if (SMB_VFS_SYS_ACL_CLEAR_PERMS(conn, *p_permset) == -1) {
3538 if (wire_perm & SMB_POSIX_ACL_READ) {
3539 if (SMB_VFS_SYS_ACL_ADD_PERM(conn, *p_permset, SMB_ACL_READ) == -1) {
3543 if (wire_perm & SMB_POSIX_ACL_WRITE) {
3544 if (SMB_VFS_SYS_ACL_ADD_PERM(conn, *p_permset, SMB_ACL_WRITE) == -1) {
3548 if (wire_perm & SMB_POSIX_ACL_EXECUTE) {
3549 if (SMB_VFS_SYS_ACL_ADD_PERM(conn, *p_permset, SMB_ACL_EXECUTE) == -1) {
3556 /****************************************************************************
3557 Map from wire type to tagtype.
3558 ****************************************************************************/
3560 static BOOL unix_ex_wire_to_tagtype(unsigned char wire_tt, SMB_ACL_TAG_T *p_tt)
3563 case SMB_POSIX_ACL_USER_OBJ:
3564 *p_tt = SMB_ACL_USER_OBJ;
3566 case SMB_POSIX_ACL_USER:
3567 *p_tt = SMB_ACL_USER;
3569 case SMB_POSIX_ACL_GROUP_OBJ:
3570 *p_tt = SMB_ACL_GROUP_OBJ;
3572 case SMB_POSIX_ACL_GROUP:
3573 *p_tt = SMB_ACL_GROUP;
3575 case SMB_POSIX_ACL_MASK:
3576 *p_tt = SMB_ACL_MASK;
3578 case SMB_POSIX_ACL_OTHER:
3579 *p_tt = SMB_ACL_OTHER;
3587 /****************************************************************************
3588 Create a new POSIX acl from wire permissions.
3589 FIXME ! How does the share mask/mode fit into this.... ?
3590 ****************************************************************************/
3592 static SMB_ACL_T create_posix_acl_from_wire(connection_struct *conn, uint16 num_acls, const char *pdata)
3595 SMB_ACL_T the_acl = SMB_VFS_SYS_ACL_INIT(conn, num_acls);
3597 if (the_acl == NULL) {
3601 for (i = 0; i < num_acls; i++) {
3602 SMB_ACL_ENTRY_T the_entry;
3603 SMB_ACL_PERMSET_T the_permset;
3604 SMB_ACL_TAG_T tag_type;
3606 if (SMB_VFS_SYS_ACL_CREATE_ENTRY(conn, &the_acl, &the_entry) == -1) {
3607 DEBUG(0,("create_posix_acl_from_wire: Failed to create entry %u. (%s)\n",
3608 i, strerror(errno) ));
3612 if (!unix_ex_wire_to_tagtype(CVAL(pdata,(i*SMB_POSIX_ACL_ENTRY_SIZE)), &tag_type)) {
3613 DEBUG(0,("create_posix_acl_from_wire: invalid wire tagtype %u on entry %u.\n",
3614 CVAL(pdata,(i*SMB_POSIX_ACL_ENTRY_SIZE)), i ));
3618 if (SMB_VFS_SYS_ACL_SET_TAG_TYPE(conn, the_entry, tag_type) == -1) {
3619 DEBUG(0,("create_posix_acl_from_wire: Failed to set tagtype on entry %u. (%s)\n",
3620 i, strerror(errno) ));
3624 /* Get the permset pointer from the new ACL entry. */
3625 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, the_entry, &the_permset) == -1) {
3626 DEBUG(0,("create_posix_acl_from_wire: Failed to get permset on entry %u. (%s)\n",
3627 i, strerror(errno) ));
3631 /* Map from wire to permissions. */
3632 if (!unix_ex_wire_to_permset(conn, CVAL(pdata,(i*SMB_POSIX_ACL_ENTRY_SIZE)+1), &the_permset)) {
3633 DEBUG(0,("create_posix_acl_from_wire: invalid permset %u on entry %u.\n",
3634 CVAL(pdata,(i*SMB_POSIX_ACL_ENTRY_SIZE) + 1), i ));
3638 /* Now apply to the new ACL entry. */
3639 if (SMB_VFS_SYS_ACL_SET_PERMSET(conn, the_entry, the_permset) == -1) {
3640 DEBUG(0,("create_posix_acl_from_wire: Failed to add permset on entry %u. (%s)\n",
3641 i, strerror(errno) ));
3645 if (tag_type == SMB_ACL_USER) {
3646 uint32 uidval = IVAL(pdata,(i*SMB_POSIX_ACL_ENTRY_SIZE)+2);
3647 uid_t uid = (uid_t)uidval;
3648 if (SMB_VFS_SYS_ACL_SET_QUALIFIER(conn, the_entry,(void *)&uid) == -1) {
3649 DEBUG(0,("create_posix_acl_from_wire: Failed to set uid %u on entry %u. (%s)\n",
3650 (unsigned int)uid, i, strerror(errno) ));
3655 if (tag_type == SMB_ACL_GROUP) {
3656 uint32 gidval = IVAL(pdata,(i*SMB_POSIX_ACL_ENTRY_SIZE)+2);
3657 gid_t gid = (uid_t)gidval;
3658 if (SMB_VFS_SYS_ACL_SET_QUALIFIER(conn, the_entry,(void *)&gid) == -1) {
3659 DEBUG(0,("create_posix_acl_from_wire: Failed to set gid %u on entry %u. (%s)\n",
3660 (unsigned int)gid, i, strerror(errno) ));
3670 if (the_acl != NULL) {
3671 SMB_VFS_SYS_ACL_FREE_ACL(conn, the_acl);
3676 /****************************************************************************
3677 Calls from UNIX extensions - Default POSIX ACL set.
3678 If num_def_acls == 0 and not a directory just return. If it is a directory
3679 and num_def_acls == 0 then remove the default acl. Else set the default acl
3681 ****************************************************************************/
3683 BOOL set_unix_posix_default_acl(connection_struct *conn, const char *fname, SMB_STRUCT_STAT *psbuf,
3684 uint16 num_def_acls, const char *pdata)
3686 SMB_ACL_T def_acl = NULL;
3688 if (num_def_acls && !S_ISDIR(psbuf->st_mode)) {
3689 DEBUG(5,("set_unix_posix_default_acl: Can't set default ACL on non-directory file %s\n", fname ));
3694 if (!num_def_acls) {
3695 /* Remove the default ACL. */
3696 if (SMB_VFS_SYS_ACL_DELETE_DEF_FILE(conn, fname) == -1) {
3697 DEBUG(5,("set_unix_posix_default_acl: acl_delete_def_file failed on directory %s (%s)\n",
3698 fname, strerror(errno) ));
3704 if ((def_acl = create_posix_acl_from_wire(conn, num_def_acls, pdata)) == NULL) {
3708 if (SMB_VFS_SYS_ACL_SET_FILE(conn, fname, SMB_ACL_TYPE_DEFAULT, def_acl) == -1) {
3709 DEBUG(5,("set_unix_posix_default_acl: acl_set_file failed on directory %s (%s)\n",
3710 fname, strerror(errno) ));
3711 SMB_VFS_SYS_ACL_FREE_ACL(conn, def_acl);
3715 DEBUG(10,("set_unix_posix_default_acl: set default acl for file %s\n", fname ));
3716 SMB_VFS_SYS_ACL_FREE_ACL(conn, def_acl);
3720 /****************************************************************************
3721 Remove an ACL from a file. As we don't have acl_delete_entry() available
3722 we must read the current acl and copy all entries except MASK, USER and GROUP
3723 to a new acl, then set that. This (at least on Linux) causes any ACL to be
3725 FIXME ! How does the share mask/mode fit into this.... ?
3726 ****************************************************************************/
3728 static BOOL remove_posix_acl(connection_struct *conn, files_struct *fsp, const char *fname)
3730 SMB_ACL_T file_acl = NULL;
3731 int entry_id = SMB_ACL_FIRST_ENTRY;
3732 SMB_ACL_ENTRY_T entry;
3734 /* Create a new ACL with only 3 entries, u/g/w. */
3735 SMB_ACL_T new_file_acl = SMB_VFS_SYS_ACL_INIT(conn, 3);
3736 SMB_ACL_ENTRY_T user_ent = NULL;
3737 SMB_ACL_ENTRY_T group_ent = NULL;
3738 SMB_ACL_ENTRY_T other_ent = NULL;
3740 if (new_file_acl == NULL) {
3741 DEBUG(5,("remove_posix_acl: failed to init new ACL with 3 entries for file %s.\n", fname));
3745 /* Now create the u/g/w entries. */
3746 if (SMB_VFS_SYS_ACL_CREATE_ENTRY(conn, &new_file_acl, &user_ent) == -1) {
3747 DEBUG(5,("remove_posix_acl: Failed to create user entry for file %s. (%s)\n",
3748 fname, strerror(errno) ));
3751 if (SMB_VFS_SYS_ACL_SET_TAG_TYPE(conn, user_ent, SMB_ACL_USER_OBJ) == -1) {
3752 DEBUG(5,("remove_posix_acl: Failed to set user entry for file %s. (%s)\n",
3753 fname, strerror(errno) ));
3757 if (SMB_VFS_SYS_ACL_CREATE_ENTRY(conn, &new_file_acl, &group_ent) == -1) {
3758 DEBUG(5,("remove_posix_acl: Failed to create group entry for file %s. (%s)\n",
3759 fname, strerror(errno) ));
3762 if (SMB_VFS_SYS_ACL_SET_TAG_TYPE(conn, group_ent, SMB_ACL_GROUP_OBJ) == -1) {
3763 DEBUG(5,("remove_posix_acl: Failed to set group entry for file %s. (%s)\n",
3764 fname, strerror(errno) ));
3768 if (SMB_VFS_SYS_ACL_CREATE_ENTRY(conn, &new_file_acl, &other_ent) == -1) {
3769 DEBUG(5,("remove_posix_acl: Failed to create other entry for file %s. (%s)\n",
3770 fname, strerror(errno) ));
3773 if (SMB_VFS_SYS_ACL_SET_TAG_TYPE(conn, other_ent, SMB_ACL_OTHER) == -1) {
3774 DEBUG(5,("remove_posix_acl: Failed to set other entry for file %s. (%s)\n",
3775 fname, strerror(errno) ));
3779 /* Get the current file ACL. */
3780 if (fsp && fsp->fh->fd != -1) {
3781 file_acl = SMB_VFS_SYS_ACL_GET_FD(fsp, fsp->fh->fd);
3783 file_acl = SMB_VFS_SYS_ACL_GET_FILE( conn, fname, SMB_ACL_TYPE_ACCESS);
3786 if (file_acl == NULL) {
3787 /* This is only returned if an error occurred. Even for a file with
3788 no acl a u/g/w acl should be returned. */
3789 DEBUG(5,("remove_posix_acl: failed to get ACL from file %s (%s).\n",
3790 fname, strerror(errno) ));
3794 while ( SMB_VFS_SYS_ACL_GET_ENTRY(conn, file_acl, entry_id, &entry) == 1) {
3795 SMB_ACL_TAG_T tagtype;
3796 SMB_ACL_PERMSET_T permset;
3799 if (entry_id == SMB_ACL_FIRST_ENTRY)
3800 entry_id = SMB_ACL_NEXT_ENTRY;
3802 if (SMB_VFS_SYS_ACL_GET_TAG_TYPE(conn, entry, &tagtype) == -1) {
3803 DEBUG(5,("remove_posix_acl: failed to get tagtype from ACL on file %s (%s).\n",
3804 fname, strerror(errno) ));
3808 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, entry, &permset) == -1) {
3809 DEBUG(5,("remove_posix_acl: failed to get permset from ACL on file %s (%s).\n",
3810 fname, strerror(errno) ));
3814 if (tagtype == SMB_ACL_USER_OBJ) {
3815 if (SMB_VFS_SYS_ACL_SET_PERMSET(conn, user_ent, permset) == -1) {
3816 DEBUG(5,("remove_posix_acl: failed to set permset from ACL on file %s (%s).\n",
3817 fname, strerror(errno) ));
3819 } else if (tagtype == SMB_ACL_GROUP_OBJ) {
3820 if (SMB_VFS_SYS_ACL_SET_PERMSET(conn, group_ent, permset) == -1) {
3821 DEBUG(5,("remove_posix_acl: failed to set permset from ACL on file %s (%s).\n",
3822 fname, strerror(errno) ));
3824 } else if (tagtype == SMB_ACL_OTHER) {
3825 if (SMB_VFS_SYS_ACL_SET_PERMSET(conn, other_ent, permset) == -1) {
3826 DEBUG(5,("remove_posix_acl: failed to set permset from ACL on file %s (%s).\n",
3827 fname, strerror(errno) ));
3832 /* Set the new empty file ACL. */
3833 if (fsp && fsp->fh->fd != -1) {
3834 if (SMB_VFS_SYS_ACL_SET_FD(fsp, fsp->fh->fd, new_file_acl) == -1) {
3835 DEBUG(5,("remove_posix_acl: acl_set_file failed on %s (%s)\n",
3836 fname, strerror(errno) ));
3840 if (SMB_VFS_SYS_ACL_SET_FILE(conn, fname, SMB_ACL_TYPE_ACCESS, new_file_acl) == -1) {
3841 DEBUG(5,("remove_posix_acl: acl_set_file failed on %s (%s)\n",
3842 fname, strerror(errno) ));
3852 SMB_VFS_SYS_ACL_FREE_ACL(conn, file_acl);
3855 SMB_VFS_SYS_ACL_FREE_ACL(conn, new_file_acl);
3860 /****************************************************************************
3861 Calls from UNIX extensions - POSIX ACL set.
3862 If num_def_acls == 0 then read/modify/write acl after removing all entries
3863 except SMB_ACL_USER_OBJ, SMB_ACL_GROUP_OBJ, SMB_ACL_OTHER.
3864 ****************************************************************************/
3866 BOOL set_unix_posix_acl(connection_struct *conn, files_struct *fsp, const char *fname, uint16 num_acls, const char *pdata)
3868 SMB_ACL_T file_acl = NULL;
3871 /* Remove the ACL from the file. */
3872 return remove_posix_acl(conn, fsp, fname);
3875 if ((file_acl = create_posix_acl_from_wire(conn, num_acls, pdata)) == NULL) {
3879 if (fsp && fsp->fh->fd != -1) {
3880 /* The preferred way - use an open fd. */
3881 if (SMB_VFS_SYS_ACL_SET_FD(fsp, fsp->fh->fd, file_acl) == -1) {
3882 DEBUG(5,("set_unix_posix_acl: acl_set_file failed on %s (%s)\n",
3883 fname, strerror(errno) ));
3884 SMB_VFS_SYS_ACL_FREE_ACL(conn, file_acl);
3888 if (SMB_VFS_SYS_ACL_SET_FILE(conn, fname, SMB_ACL_TYPE_ACCESS, file_acl) == -1) {
3889 DEBUG(5,("set_unix_posix_acl: acl_set_file failed on %s (%s)\n",
3890 fname, strerror(errno) ));
3891 SMB_VFS_SYS_ACL_FREE_ACL(conn, file_acl);
3896 DEBUG(10,("set_unix_posix_acl: set acl for file %s\n", fname ));
3897 SMB_VFS_SYS_ACL_FREE_ACL(conn, file_acl);
3901 /****************************************************************************
3902 Check for POSIX group ACLs. If none use stat entry.
3903 Return -1 if no match, 0 if match and denied, 1 if match and allowed.
3904 ****************************************************************************/
3906 static int check_posix_acl_group_access(connection_struct *conn, const char *fname, SMB_STRUCT_STAT *psbuf, uint32 access_mask)
3908 SMB_ACL_T posix_acl = NULL;
3909 int entry_id = SMB_ACL_FIRST_ENTRY;
3910 SMB_ACL_ENTRY_T entry;
3912 BOOL seen_mask = False;
3913 BOOL seen_owning_group = False;
3917 DEBUG(10,("check_posix_acl_group_access: requesting 0x%x on file %s\n",
3918 (unsigned int)access_mask, fname ));
3920 if ((posix_acl = SMB_VFS_SYS_ACL_GET_FILE(conn, fname, SMB_ACL_TYPE_ACCESS)) == NULL) {
3924 /* First ensure the group mask allows group access. */
3925 /* Also check any user entries (these take preference over group). */
3927 while ( SMB_VFS_SYS_ACL_GET_ENTRY(conn, posix_acl, entry_id, &entry) == 1) {
3928 SMB_ACL_TAG_T tagtype;
3929 SMB_ACL_PERMSET_T permset;
3930 int have_write = -1;
3934 if (entry_id == SMB_ACL_FIRST_ENTRY)
3935 entry_id = SMB_ACL_NEXT_ENTRY;
3937 if (SMB_VFS_SYS_ACL_GET_TAG_TYPE(conn, entry, &tagtype) == -1) {
3941 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, entry, &permset) == -1) {
3945 have_read = SMB_VFS_SYS_ACL_GET_PERM(conn, permset, SMB_ACL_READ);
3946 if (have_read == -1) {
3950 have_write = SMB_VFS_SYS_ACL_GET_PERM(conn, permset, SMB_ACL_WRITE);
3951 if (have_write == -1) {
3956 * Solaris returns 2 for this if write is available.
3957 * canonicalize to 0 or 1.
3959 have_write = (have_write ? 1 : 0);
3960 have_read = (have_read ? 1 : 0);
3965 switch (access_mask) {
3966 case FILE_READ_DATA:
3969 DEBUG(10,("check_posix_acl_group_access: file %s "
3970 "refusing read due to mask.\n", fname));
3974 case FILE_WRITE_DATA:
3977 DEBUG(10,("check_posix_acl_group_access: file %s "
3978 "refusing write due to mask.\n", fname));
3982 default: /* FILE_READ_DATA|FILE_WRITE_DATA */
3983 if (!have_write || !have_read) {
3985 DEBUG(10,("check_posix_acl_group_access: file %s "
3986 "refusing read/write due to mask.\n", fname));
3994 /* Check against current_user.ut.uid. */
3995 uid_t *puid = (uid_t *)SMB_VFS_SYS_ACL_GET_QUALIFIER(conn, entry);
3999 if (current_user.ut.uid == *puid) {
4000 /* We have a uid match but we must ensure we have seen the acl mask. */
4001 switch (access_mask) {
4002 case FILE_READ_DATA:
4005 case FILE_WRITE_DATA:
4008 default: /* FILE_READ_DATA|FILE_WRITE_DATA */
4009 ret = (have_write & have_read);
4012 DEBUG(10,("check_posix_acl_group_access: file %s "
4013 "match on user %u -> %s.\n",
4014 fname, (unsigned int)*puid,
4015 ret ? "can access" : "cannot access"));
4027 /* If ret is anything other than -1 we matched on a user entry. */
4032 /* Next check all group entries. */
4033 entry_id = SMB_ACL_FIRST_ENTRY;
4034 while ( SMB_VFS_SYS_ACL_GET_ENTRY(conn, posix_acl, entry_id, &entry) == 1) {
4035 SMB_ACL_TAG_T tagtype;
4036 SMB_ACL_PERMSET_T permset;
4037 int have_write = -1;
4041 if (entry_id == SMB_ACL_FIRST_ENTRY)
4042 entry_id = SMB_ACL_NEXT_ENTRY;
4044 if (SMB_VFS_SYS_ACL_GET_TAG_TYPE(conn, entry, &tagtype) == -1) {
4048 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, entry, &permset) == -1) {
4052 have_read = SMB_VFS_SYS_ACL_GET_PERM(conn, permset, SMB_ACL_READ);
4053 if (have_read == -1) {
4057 have_write = SMB_VFS_SYS_ACL_GET_PERM(conn, permset, SMB_ACL_WRITE);
4058 if (have_write == -1) {
4063 * Solaris returns 2 for this if write is available.
4064 * canonicalize to 0 or 1.
4066 have_write = (have_write ? 1 : 0);
4067 have_read = (have_read ? 1 : 0);
4071 case SMB_ACL_GROUP_OBJ:
4075 if (tagtype == SMB_ACL_GROUP) {
4076 pgid = (gid_t *)SMB_VFS_SYS_ACL_GET_QUALIFIER(conn, entry);
4078 seen_owning_group = True;
4079 pgid = &psbuf->st_gid;
4086 * Does it match the current effective group
4087 * or supplementary groups ?
4089 for (cu_gid = get_current_user_gid_first(&i); cu_gid != (gid_t)-1;
4090 cu_gid = get_current_user_gid_next(&i)) {
4091 if (cu_gid == *pgid) {
4092 switch (access_mask) {
4093 case FILE_READ_DATA:
4096 case FILE_WRITE_DATA:
4099 default: /* FILE_READ_DATA|FILE_WRITE_DATA */
4100 ret = (have_write & have_read);
4104 DEBUG(10,("check_posix_acl_group_access: file %s "
4105 "match on group %u -> can access.\n",
4106 fname, (unsigned int)cu_gid ));
4108 /* If we don't have access permission this entry doesn't
4109 terminate the enumeration of the entries. */
4113 /* But does terminate the group iteration. */
4124 /* If ret is -1 here we didn't match on the user entry or
4125 supplemental group entries. */
4127 DEBUG(10,("check_posix_acl_group_access: ret = %d before check_stat:\n", ret));
4132 * We only check the S_I[RW]GRP permissions if we haven't already
4133 * seen an owning group SMB_ACL_GROUP_OBJ ace entry. If there is an
4134 * SMB_ACL_GROUP_OBJ ace entry then the group bits in st_gid are
4135 * the same as the SMB_ACL_MASK bits, not the SMB_ACL_GROUP_OBJ
4136 * bits. Thanks to Marc Cousin <mcousin@sigma.fr> for pointing
4140 if (!seen_owning_group) {
4141 /* Do we match on the owning group entry ? */
4143 * Does it match the current effective group
4144 * or supplementary groups ?
4146 for (cu_gid = get_current_user_gid_first(&i); cu_gid != (gid_t)-1;
4147 cu_gid = get_current_user_gid_next(&i)) {
4148 if (cu_gid == psbuf->st_gid) {
4149 switch (access_mask) {
4150 case FILE_READ_DATA:
4151 ret = (psbuf->st_mode & S_IRGRP) ? 1 : 0;
4153 case FILE_WRITE_DATA:
4154 ret = (psbuf->st_mode & S_IWGRP) ? 1 : 0;
4156 default: /* FILE_READ_DATA|FILE_WRITE_DATA */
4157 if ((psbuf->st_mode & (S_IWGRP|S_IRGRP)) == (S_IWGRP|S_IRGRP)) {
4164 DEBUG(10,("check_posix_acl_group_access: file %s "
4165 "match on owning group %u -> %s.\n",
4166 fname, (unsigned int)psbuf->st_gid,
4167 ret ? "can access" : "cannot access"));
4172 if (cu_gid == (gid_t)-1) {
4173 DEBUG(10,("check_posix_acl_group_access: file %s "
4174 "failed to match on user or group in token (ret = %d).\n",
4182 SMB_VFS_SYS_ACL_FREE_ACL(conn, posix_acl);
4185 DEBUG(10,("check_posix_acl_group_access: file %s returning (ret = %d).\n", fname, ret ));
4189 /****************************************************************************
4190 Actually emulate the in-kernel access checking for delete access. We need
4191 this to successfully return ACCESS_DENIED on a file open for delete access.
4192 ****************************************************************************/
4194 BOOL can_delete_file_in_directory(connection_struct *conn, const char *fname)
4196 SMB_STRUCT_STAT sbuf;
4200 if (!CAN_WRITE(conn)) {
4204 /* Get the parent directory permission mask and owners. */
4205 pstrcpy(dname, parent_dirname(fname));
4206 if(SMB_VFS_STAT(conn, dname, &sbuf) != 0) {
4209 if (!S_ISDIR(sbuf.st_mode)) {
4212 if (current_user.ut.uid == 0 || conn->admin_user) {
4213 /* I'm sorry sir, I didn't know you were root... */
4217 /* Check primary owner write access. */
4218 if (current_user.ut.uid == sbuf.st_uid) {
4219 return (sbuf.st_mode & S_IWUSR) ? True : False;
4223 /* sticky bit means delete only by owner or root. */
4224 if (sbuf.st_mode & S_ISVTX) {
4225 SMB_STRUCT_STAT sbuf_file;
4226 if(SMB_VFS_STAT(conn, fname, &sbuf_file) != 0) {
4230 * Patch from SATOH Fumiyasu <fumiyas@miraclelinux.com>
4231 * for bug #3348. Don't assume owning sticky bit
4232 * directory means write access allowed.
4234 if (current_user.ut.uid != sbuf_file.st_uid) {
4240 /* Check group or explicit user acl entry write access. */
4241 ret = check_posix_acl_group_access(conn, dname, &sbuf, FILE_WRITE_DATA);
4242 if (ret == 0 || ret == 1) {
4243 return ret ? True : False;
4246 /* Finally check other write access. */
4247 return (sbuf.st_mode & S_IWOTH) ? True : False;
4250 /****************************************************************************
4251 Actually emulate the in-kernel access checking for read/write access. We need
4252 this to successfully check for ability to write for dos filetimes.
4253 Note this doesn't take into account share write permissions.
4254 ****************************************************************************/
4256 BOOL can_access_file(connection_struct *conn, const char *fname, SMB_STRUCT_STAT *psbuf, uint32 access_mask)
4260 if (!(access_mask & (FILE_READ_DATA|FILE_WRITE_DATA))) {
4263 access_mask &= (FILE_READ_DATA|FILE_WRITE_DATA);
4265 DEBUG(10,("can_access_file: requesting 0x%x on file %s\n",
4266 (unsigned int)access_mask, fname ));
4268 if (current_user.ut.uid == 0 || conn->admin_user) {
4269 /* I'm sorry sir, I didn't know you were root... */
4273 if (!VALID_STAT(*psbuf)) {
4274 /* Get the file permission mask and owners. */
4275 if(SMB_VFS_STAT(conn, fname, psbuf) != 0) {
4280 /* Check primary owner access. */
4281 if (current_user.ut.uid == psbuf->st_uid) {
4282 switch (access_mask) {
4283 case FILE_READ_DATA:
4284 return (psbuf->st_mode & S_IRUSR) ? True : False;
4286 case FILE_WRITE_DATA:
4287 return (psbuf->st_mode & S_IWUSR) ? True : False;
4289 default: /* FILE_READ_DATA|FILE_WRITE_DATA */
4291 if ((psbuf->st_mode & (S_IWUSR|S_IRUSR)) == (S_IWUSR|S_IRUSR)) {
4299 /* Check group or explicit user acl entry access. */
4300 ret = check_posix_acl_group_access(conn, fname, psbuf, access_mask);
4301 if (ret == 0 || ret == 1) {
4302 return ret ? True : False;
4305 /* Finally check other access. */
4306 switch (access_mask) {
4307 case FILE_READ_DATA:
4308 return (psbuf->st_mode & S_IROTH) ? True : False;
4310 case FILE_WRITE_DATA:
4311 return (psbuf->st_mode & S_IWOTH) ? True : False;
4313 default: /* FILE_READ_DATA|FILE_WRITE_DATA */
4315 if ((psbuf->st_mode & (S_IWOTH|S_IROTH)) == (S_IWOTH|S_IROTH)) {
4322 /****************************************************************************
4323 Userspace check for write access.
4324 Note this doesn't take into account share write permissions.
4325 ****************************************************************************/
4327 BOOL can_write_to_file(connection_struct *conn, const char *fname, SMB_STRUCT_STAT *psbuf)
4329 return can_access_file(conn, fname, psbuf, FILE_WRITE_DATA);
4332 /********************************************************************
4333 Pull the NT ACL from a file on disk or the OpenEventlog() access
4334 check. Caller is responsible for freeing the returned security
4335 descriptor via TALLOC_FREE(). This is designed for dealing with
4336 user space access checks in smbd outside of the VFS. For example,
4337 checking access rights in OpenEventlog().
4339 Assume we are dealing with files (for now)
4340 ********************************************************************/
4342 SEC_DESC* get_nt_acl_no_snum( TALLOC_CTX *ctx, const char *fname)
4344 SEC_DESC *psd, *ret_sd;
4345 connection_struct conn;
4347 struct fd_handle fh;
4351 ZERO_STRUCT( conn );
4353 if ( !(conn.mem_ctx = talloc_init( "novfs_get_nt_acl" )) ) {
4354 DEBUG(0,("get_nt_acl_no_snum: talloc() failed!\n"));
4358 if (!(conn.params = TALLOC_P(conn.mem_ctx, struct share_params))) {
4359 DEBUG(0,("get_nt_acl_no_snum: talloc() failed!\n"));
4360 TALLOC_FREE(conn.mem_ctx);
4364 conn.params->service = -1;
4366 pstrcpy( path, "/" );
4367 set_conn_connectpath(&conn, path);
4369 if (!smbd_vfs_init(&conn)) {
4370 DEBUG(0,("get_nt_acl_no_snum: Unable to create a fake connection struct!\n"));
4371 conn_free_internal( &conn );
4375 ZERO_STRUCT( finfo );
4382 pstrcpy( filename, fname );
4383 finfo.fsp_name = filename;
4385 if (get_nt_acl( &finfo, DACL_SECURITY_INFORMATION, &psd ) == 0) {
4386 DEBUG(0,("get_nt_acl_no_snum: get_nt_acl returned zero.\n"));
4387 conn_free_internal( &conn );
4391 ret_sd = dup_sec_desc( ctx, psd );
4393 conn_free_internal( &conn );