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( uint32 *mask, int type)
869 if((*mask) & GENERIC_ALL_ACCESS)
870 mode = S_IRUSR|S_IWUSR|S_IXUSR;
872 mode |= ((*mask) & (GENERIC_READ_ACCESS|FILE_SPECIFIC_READ_BITS)) ? S_IRUSR : 0;
873 mode |= ((*mask) & (GENERIC_WRITE_ACCESS|FILE_SPECIFIC_WRITE_BITS)) ? S_IWUSR : 0;
874 mode |= ((*mask) & (GENERIC_EXECUTE_ACCESS|FILE_SPECIFIC_EXECUTE_BITS)) ? S_IXUSR : 0;
878 if((*mask) & GENERIC_ALL_ACCESS)
879 mode = S_IRGRP|S_IWGRP|S_IXGRP;
881 mode |= ((*mask) & (GENERIC_READ_ACCESS|FILE_SPECIFIC_READ_BITS)) ? S_IRGRP : 0;
882 mode |= ((*mask) & (GENERIC_WRITE_ACCESS|FILE_SPECIFIC_WRITE_BITS)) ? S_IWGRP : 0;
883 mode |= ((*mask) & (GENERIC_EXECUTE_ACCESS|FILE_SPECIFIC_EXECUTE_BITS)) ? S_IXGRP : 0;
887 if((*mask) & GENERIC_ALL_ACCESS)
888 mode = S_IROTH|S_IWOTH|S_IXOTH;
890 mode |= ((*mask) & (GENERIC_READ_ACCESS|FILE_SPECIFIC_READ_BITS)) ? S_IROTH : 0;
891 mode |= ((*mask) & (GENERIC_WRITE_ACCESS|FILE_SPECIFIC_WRITE_BITS)) ? S_IWOTH : 0;
892 mode |= ((*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 BOOL unpack_nt_owners(int snum, 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->group_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 *current_ace = NULL;
1245 BOOL got_dir_allow = False;
1246 BOOL got_file_allow = False;
1253 * Convert the incoming ACL into a more regular form.
1256 for(i = 0; i < dacl->num_aces; i++) {
1257 SEC_ACE *psa = &dacl->aces[i];
1259 if((psa->type != SEC_ACE_TYPE_ACCESS_ALLOWED) && (psa->type != SEC_ACE_TYPE_ACCESS_DENIED)) {
1260 DEBUG(3,("create_canon_ace_lists: unable to set anything but an ALLOW or DENY ACE.\n"));
1264 if (nt4_compatible_acls()) {
1266 * The security mask may be UNIX_ACCESS_NONE which should map into
1267 * no permissions (we overload the WRITE_OWNER bit for this) or it
1268 * should be one of the ALL/EXECUTE/READ/WRITE bits. Arrange for this
1269 * to be so. Any other bits override the UNIX_ACCESS_NONE bit.
1273 * Convert GENERIC bits to specific bits.
1276 se_map_generic(&psa->access_mask, &file_generic_mapping);
1278 psa->access_mask &= (UNIX_ACCESS_NONE|FILE_ALL_ACCESS);
1280 if(psa->access_mask != UNIX_ACCESS_NONE)
1281 psa->access_mask &= ~UNIX_ACCESS_NONE;
1286 * Deal with the fact that NT 4.x re-writes the canonical format
1287 * that we return for default ACLs. If a directory ACE is identical
1288 * to a inherited directory ACE then NT changes the bits so that the
1289 * first ACE is set to OI|IO and the second ACE for this SID is set
1290 * to CI. We need to repair this. JRA.
1293 for(i = 0; i < dacl->num_aces; i++) {
1294 SEC_ACE *psa1 = &dacl->aces[i];
1296 for (j = i + 1; j < dacl->num_aces; j++) {
1297 SEC_ACE *psa2 = &dacl->aces[j];
1299 if (psa1->access_mask != psa2->access_mask)
1302 if (!sid_equal(&psa1->trustee, &psa2->trustee))
1306 * Ok - permission bits and SIDs are equal.
1307 * Check if flags were re-written.
1310 if (psa1->flags & SEC_ACE_FLAG_INHERIT_ONLY) {
1312 psa1->flags |= (psa2->flags & (SEC_ACE_FLAG_CONTAINER_INHERIT|SEC_ACE_FLAG_OBJECT_INHERIT));
1313 psa2->flags &= ~(SEC_ACE_FLAG_CONTAINER_INHERIT|SEC_ACE_FLAG_OBJECT_INHERIT);
1315 } else if (psa2->flags & SEC_ACE_FLAG_INHERIT_ONLY) {
1317 psa2->flags |= (psa1->flags & (SEC_ACE_FLAG_CONTAINER_INHERIT|SEC_ACE_FLAG_OBJECT_INHERIT));
1318 psa1->flags &= ~(SEC_ACE_FLAG_CONTAINER_INHERIT|SEC_ACE_FLAG_OBJECT_INHERIT);
1324 for(i = 0; i < dacl->num_aces; i++) {
1325 SEC_ACE *psa = &dacl->aces[i];
1328 * Ignore non-mappable SIDs (NT Authority, BUILTIN etc).
1331 if (non_mappable_sid(&psa->trustee)) {
1333 DEBUG(10,("create_canon_ace_lists: ignoring non-mappable SID %s\n",
1334 sid_to_string(str, &psa->trustee) ));
1339 * Create a cannon_ace entry representing this NT DACL ACE.
1342 if ((current_ace = SMB_MALLOC_P(canon_ace)) == NULL) {
1343 free_canon_ace_list(file_ace);
1344 free_canon_ace_list(dir_ace);
1345 DEBUG(0,("create_canon_ace_lists: malloc fail.\n"));
1349 ZERO_STRUCTP(current_ace);
1351 sid_copy(¤t_ace->trustee, &psa->trustee);
1354 * Try and work out if the SID is a user or group
1355 * as we need to flag these differently for POSIX.
1356 * Note what kind of a POSIX ACL this should map to.
1359 if( sid_equal(¤t_ace->trustee, &global_sid_World)) {
1360 current_ace->owner_type = WORLD_ACE;
1361 current_ace->unix_ug.world = -1;
1362 current_ace->type = SMB_ACL_OTHER;
1363 } else if (sid_equal(¤t_ace->trustee, &global_sid_Creator_Owner)) {
1364 current_ace->owner_type = UID_ACE;
1365 current_ace->unix_ug.uid = pst->st_uid;
1366 current_ace->type = SMB_ACL_USER_OBJ;
1369 * The Creator Owner entry only specifies inheritable permissions,
1370 * never access permissions. WinNT doesn't always set the ACE to
1371 *INHERIT_ONLY, though.
1374 if (nt4_compatible_acls())
1375 psa->flags |= SEC_ACE_FLAG_INHERIT_ONLY;
1376 } else if (sid_equal(¤t_ace->trustee, &global_sid_Creator_Group)) {
1377 current_ace->owner_type = GID_ACE;
1378 current_ace->unix_ug.gid = pst->st_gid;
1379 current_ace->type = SMB_ACL_GROUP_OBJ;
1382 * The Creator Group entry only specifies inheritable permissions,
1383 * never access permissions. WinNT doesn't always set the ACE to
1384 *INHERIT_ONLY, though.
1386 if (nt4_compatible_acls())
1387 psa->flags |= SEC_ACE_FLAG_INHERIT_ONLY;
1389 } else if (sid_to_uid( ¤t_ace->trustee, ¤t_ace->unix_ug.uid)) {
1390 current_ace->owner_type = UID_ACE;
1391 current_ace->type = SMB_ACL_USER;
1392 } else if (sid_to_gid( ¤t_ace->trustee, ¤t_ace->unix_ug.gid)) {
1393 current_ace->owner_type = GID_ACE;
1394 current_ace->type = SMB_ACL_GROUP;
1398 free_canon_ace_list(file_ace);
1399 free_canon_ace_list(dir_ace);
1400 DEBUG(0,("create_canon_ace_lists: unable to map SID %s to uid or gid.\n",
1401 sid_to_string(str, ¤t_ace->trustee) ));
1402 SAFE_FREE(current_ace);
1407 * Map the given NT permissions into a UNIX mode_t containing only
1408 * S_I(R|W|X)USR bits.
1411 current_ace->perms |= map_nt_perms( &psa->access_mask, S_IRUSR);
1412 current_ace->attr = (psa->type == SEC_ACE_TYPE_ACCESS_ALLOWED) ? ALLOW_ACE : DENY_ACE;
1413 current_ace->inherited = ((psa->flags & SEC_ACE_FLAG_INHERITED_ACE) ? True : False);
1416 * Now add the created ace to either the file list, the directory
1417 * list, or both. We *MUST* preserve the order here (hence we use
1418 * DLIST_ADD_END) as NT ACLs are order dependent.
1421 if (fsp->is_directory) {
1424 * We can only add to the default POSIX ACE list if the ACE is
1425 * designed to be inherited by both files and directories.
1428 if ((psa->flags & (SEC_ACE_FLAG_OBJECT_INHERIT|SEC_ACE_FLAG_CONTAINER_INHERIT)) ==
1429 (SEC_ACE_FLAG_OBJECT_INHERIT|SEC_ACE_FLAG_CONTAINER_INHERIT)) {
1431 DLIST_ADD_END(dir_ace, current_ace, canon_ace *);
1434 * Note if this was an allow ace. We can't process
1435 * any further deny ace's after this.
1438 if (current_ace->attr == ALLOW_ACE)
1439 got_dir_allow = True;
1441 if ((current_ace->attr == DENY_ACE) && got_dir_allow) {
1442 DEBUG(0,("create_canon_ace_lists: malformed ACL in inheritable ACL ! \
1443 Deny entry after Allow entry. Failing to set on file %s.\n", fsp->fsp_name ));
1444 free_canon_ace_list(file_ace);
1445 free_canon_ace_list(dir_ace);
1449 if( DEBUGLVL( 10 )) {
1450 dbgtext("create_canon_ace_lists: adding dir ACL:\n");
1451 print_canon_ace( current_ace, 0);
1455 * If this is not an inherit only ACE we need to add a duplicate
1459 if (!(psa->flags & SEC_ACE_FLAG_INHERIT_ONLY)) {
1460 canon_ace *dup_ace = dup_canon_ace(current_ace);
1463 DEBUG(0,("create_canon_ace_lists: malloc fail !\n"));
1464 free_canon_ace_list(file_ace);
1465 free_canon_ace_list(dir_ace);
1470 * We must not free current_ace here as its
1471 * pointer is now owned by the dir_ace list.
1473 current_ace = dup_ace;
1476 * We must not free current_ace here as its
1477 * pointer is now owned by the dir_ace list.
1485 * Only add to the file ACL if not inherit only.
1488 if (current_ace && !(psa->flags & SEC_ACE_FLAG_INHERIT_ONLY)) {
1489 DLIST_ADD_END(file_ace, current_ace, canon_ace *);
1492 * Note if this was an allow ace. We can't process
1493 * any further deny ace's after this.
1496 if (current_ace->attr == ALLOW_ACE)
1497 got_file_allow = True;
1499 if ((current_ace->attr == DENY_ACE) && got_file_allow) {
1500 DEBUG(0,("create_canon_ace_lists: malformed ACL in file ACL ! \
1501 Deny entry after Allow entry. Failing to set on file %s.\n", fsp->fsp_name ));
1502 free_canon_ace_list(file_ace);
1503 free_canon_ace_list(dir_ace);
1507 if( DEBUGLVL( 10 )) {
1508 dbgtext("create_canon_ace_lists: adding file ACL:\n");
1509 print_canon_ace( current_ace, 0);
1511 all_aces_are_inherit_only = False;
1513 * We must not free current_ace here as its
1514 * pointer is now owned by the file_ace list.
1520 * Free if ACE was not added.
1523 SAFE_FREE(current_ace);
1526 if (fsp->is_directory && all_aces_are_inherit_only) {
1528 * Windows 2000 is doing one of these weird 'inherit acl'
1529 * traverses to conserve NTFS ACL resources. Just pretend
1530 * there was no DACL sent. JRA.
1533 DEBUG(10,("create_canon_ace_lists: Win2k inherit acl traverse. Ignoring DACL.\n"));
1534 free_canon_ace_list(file_ace);
1535 free_canon_ace_list(dir_ace);
1540 * Check if we have SMB_ACL_USER_OBJ and SMB_ACL_GROUP_OBJ entries in each
1541 * ACL. If we don't have them, check if any SMB_ACL_USER/SMB_ACL_GROUP
1542 * entries can be converted to *_OBJ. Usually we will already have these
1543 * entries in the Default ACL, and the Access ACL will not have them.
1546 check_owning_objs(file_ace, pfile_owner_sid, pfile_grp_sid);
1549 check_owning_objs(dir_ace, pfile_owner_sid, pfile_grp_sid);
1553 *ppfile_ace = file_ace;
1554 *ppdir_ace = dir_ace;
1559 /****************************************************************************
1560 ASCII art time again... JRA :-).
1562 We have 4 cases to process when moving from an NT ACL to a POSIX ACL. Firstly,
1563 we insist the ACL is in canonical form (ie. all DENY entries preceede ALLOW
1564 entries). Secondly, the merge code has ensured that all duplicate SID entries for
1565 allow or deny have been merged, so the same SID can only appear once in the deny
1566 list or once in the allow list.
1568 We then process as follows :
1570 ---------------------------------------------------------------------------
1571 First pass - look for a Everyone DENY entry.
1573 If it is deny all (rwx) trunate the list at this point.
1574 Else, walk the list from this point and use the deny permissions of this
1575 entry as a mask on all following allow entries. Finally, delete
1576 the Everyone DENY entry (we have applied it to everything possible).
1578 In addition, in this pass we remove any DENY entries that have
1579 no permissions (ie. they are a DENY nothing).
1580 ---------------------------------------------------------------------------
1581 Second pass - only deal with deny user entries.
1583 DENY user1 (perms XXX)
1586 for all following allow group entries where user1 is in group
1587 new_perms |= group_perms;
1589 user1 entry perms = new_perms & ~ XXX;
1591 Convert the deny entry to an allow entry with the new perms and
1592 push to the end of the list. Note if the user was in no groups
1593 this maps to a specific allow nothing entry for this user.
1595 The common case from the NT ACL choser (userX deny all) is
1596 optimised so we don't do the group lookup - we just map to
1597 an allow nothing entry.
1599 What we're doing here is inferring the allow permissions the
1600 person setting the ACE on user1 wanted by looking at the allow
1601 permissions on the groups the user is currently in. This will
1602 be a snapshot, depending on group membership but is the best
1603 we can do and has the advantage of failing closed rather than
1605 ---------------------------------------------------------------------------
1606 Third pass - only deal with deny group entries.
1608 DENY group1 (perms XXX)
1610 for all following allow user entries where user is in group1
1611 user entry perms = user entry perms & ~ XXX;
1613 If there is a group Everyone allow entry with permissions YYY,
1614 convert the group1 entry to an allow entry and modify its
1617 new_perms = YYY & ~ XXX
1619 and push to the end of the list.
1621 If there is no group Everyone allow entry then convert the
1622 group1 entry to a allow nothing entry and push to the end of the list.
1624 Note that the common case from the NT ACL choser (groupX deny all)
1625 cannot be optimised here as we need to modify user entries who are
1626 in the group to change them to a deny all also.
1628 What we're doing here is modifying the allow permissions of
1629 user entries (which are more specific in POSIX ACLs) to mask
1630 out the explicit deny set on the group they are in. This will
1631 be a snapshot depending on current group membership but is the
1632 best we can do and has the advantage of failing closed rather
1634 ---------------------------------------------------------------------------
1635 Fourth pass - cope with cumulative permissions.
1637 for all allow user entries, if there exists an allow group entry with
1638 more permissive permissions, and the user is in that group, rewrite the
1639 allow user permissions to contain both sets of permissions.
1641 Currently the code for this is #ifdef'ed out as these semantics make
1642 no sense to me. JRA.
1643 ---------------------------------------------------------------------------
1645 Note we *MUST* do the deny user pass first as this will convert deny user
1646 entries into allow user entries which can then be processed by the deny
1649 The above algorithm took a *lot* of thinking about - hence this
1650 explaination :-). JRA.
1651 ****************************************************************************/
1653 /****************************************************************************
1654 Process a canon_ace list entries. This is very complex code. We need
1655 to go through and remove the "deny" permissions from any allow entry that matches
1656 the id of this entry. We have already refused any NT ACL that wasn't in correct
1657 order (DENY followed by ALLOW). If any allow entry ends up with zero permissions,
1658 we just remove it (to fail safe). We have already removed any duplicate ace
1659 entries. Treat an "Everyone" DENY_ACE as a special case - use it to mask all
1661 ****************************************************************************/
1663 static void process_deny_list( canon_ace **pp_ace_list )
1665 canon_ace *ace_list = *pp_ace_list;
1666 canon_ace *curr_ace = NULL;
1667 canon_ace *curr_ace_next = NULL;
1669 /* Pass 1 above - look for an Everyone, deny entry. */
1671 for (curr_ace = ace_list; curr_ace; curr_ace = curr_ace_next) {
1672 canon_ace *allow_ace_p;
1674 curr_ace_next = curr_ace->next; /* So we can't lose the link. */
1676 if (curr_ace->attr != DENY_ACE)
1679 if (curr_ace->perms == (mode_t)0) {
1681 /* Deny nothing entry - delete. */
1683 DLIST_REMOVE(ace_list, curr_ace);
1687 if (!sid_equal(&curr_ace->trustee, &global_sid_World))
1690 /* JRATEST - assert. */
1691 SMB_ASSERT(curr_ace->owner_type == WORLD_ACE);
1693 if (curr_ace->perms == ALL_ACE_PERMS) {
1696 * Optimisation. This is a DENY_ALL to Everyone. Truncate the
1697 * list at this point including this entry.
1700 canon_ace *prev_entry = curr_ace->prev;
1702 free_canon_ace_list( curr_ace );
1704 prev_entry->next = NULL;
1706 /* We deleted the entire list. */
1712 for (allow_ace_p = curr_ace->next; allow_ace_p; allow_ace_p = allow_ace_p->next) {
1715 * Only mask off allow entries.
1718 if (allow_ace_p->attr != ALLOW_ACE)
1721 allow_ace_p->perms &= ~curr_ace->perms;
1725 * Now it's been applied, remove it.
1728 DLIST_REMOVE(ace_list, curr_ace);
1731 /* Pass 2 above - deal with deny user entries. */
1733 for (curr_ace = ace_list; curr_ace; curr_ace = curr_ace_next) {
1734 mode_t new_perms = (mode_t)0;
1735 canon_ace *allow_ace_p;
1737 curr_ace_next = curr_ace->next; /* So we can't lose the link. */
1739 if (curr_ace->attr != DENY_ACE)
1742 if (curr_ace->owner_type != UID_ACE)
1745 if (curr_ace->perms == ALL_ACE_PERMS) {
1748 * Optimisation - this is a deny everything to this user.
1749 * Convert to an allow nothing and push to the end of the list.
1752 curr_ace->attr = ALLOW_ACE;
1753 curr_ace->perms = (mode_t)0;
1754 DLIST_DEMOTE(ace_list, curr_ace, canon_ace *);
1758 for (allow_ace_p = curr_ace->next; allow_ace_p; allow_ace_p = allow_ace_p->next) {
1760 if (allow_ace_p->attr != ALLOW_ACE)
1763 /* We process GID_ACE and WORLD_ACE entries only. */
1765 if (allow_ace_p->owner_type == UID_ACE)
1768 if (uid_entry_in_group( curr_ace, allow_ace_p))
1769 new_perms |= allow_ace_p->perms;
1773 * Convert to a allow entry, modify the perms and push to the end
1777 curr_ace->attr = ALLOW_ACE;
1778 curr_ace->perms = (new_perms & ~curr_ace->perms);
1779 DLIST_DEMOTE(ace_list, curr_ace, canon_ace *);
1782 /* Pass 3 above - deal with deny group entries. */
1784 for (curr_ace = ace_list; curr_ace; curr_ace = curr_ace_next) {
1785 canon_ace *allow_ace_p;
1786 canon_ace *allow_everyone_p = NULL;
1788 curr_ace_next = curr_ace->next; /* So we can't lose the link. */
1790 if (curr_ace->attr != DENY_ACE)
1793 if (curr_ace->owner_type != GID_ACE)
1796 for (allow_ace_p = curr_ace->next; allow_ace_p; allow_ace_p = allow_ace_p->next) {
1798 if (allow_ace_p->attr != ALLOW_ACE)
1801 /* Store a pointer to the Everyone allow, if it exists. */
1802 if (allow_ace_p->owner_type == WORLD_ACE)
1803 allow_everyone_p = allow_ace_p;
1805 /* We process UID_ACE entries only. */
1807 if (allow_ace_p->owner_type != UID_ACE)
1810 /* Mask off the deny group perms. */
1812 if (uid_entry_in_group( allow_ace_p, curr_ace))
1813 allow_ace_p->perms &= ~curr_ace->perms;
1817 * Convert the deny to an allow with the correct perms and
1818 * push to the end of the list.
1821 curr_ace->attr = ALLOW_ACE;
1822 if (allow_everyone_p)
1823 curr_ace->perms = allow_everyone_p->perms & ~curr_ace->perms;
1825 curr_ace->perms = (mode_t)0;
1826 DLIST_DEMOTE(ace_list, curr_ace, canon_ace *);
1829 /* Doing this fourth pass allows Windows semantics to be layered
1830 * on top of POSIX semantics. I'm not sure if this is desirable.
1831 * For example, in W2K ACLs there is no way to say, "Group X no
1832 * access, user Y full access" if user Y is a member of group X.
1833 * This seems completely broken semantics to me.... JRA.
1837 /* Pass 4 above - deal with allow entries. */
1839 for (curr_ace = ace_list; curr_ace; curr_ace = curr_ace_next) {
1840 canon_ace *allow_ace_p;
1842 curr_ace_next = curr_ace->next; /* So we can't lose the link. */
1844 if (curr_ace->attr != ALLOW_ACE)
1847 if (curr_ace->owner_type != UID_ACE)
1850 for (allow_ace_p = ace_list; allow_ace_p; allow_ace_p = allow_ace_p->next) {
1852 if (allow_ace_p->attr != ALLOW_ACE)
1855 /* We process GID_ACE entries only. */
1857 if (allow_ace_p->owner_type != GID_ACE)
1860 /* OR in the group perms. */
1862 if (uid_entry_in_group( curr_ace, allow_ace_p))
1863 curr_ace->perms |= allow_ace_p->perms;
1868 *pp_ace_list = ace_list;
1871 /****************************************************************************
1872 Create a default mode that will be used if a security descriptor entry has
1873 no user/group/world entries.
1874 ****************************************************************************/
1876 static mode_t create_default_mode(files_struct *fsp, BOOL interitable_mode)
1878 int snum = SNUM(fsp->conn);
1879 mode_t and_bits = (mode_t)0;
1880 mode_t or_bits = (mode_t)0;
1881 mode_t mode = interitable_mode ? unix_mode( fsp->conn, FILE_ATTRIBUTE_ARCHIVE, fsp->fsp_name, False) : S_IRUSR;
1883 if (fsp->is_directory)
1884 mode |= (S_IWUSR|S_IXUSR);
1887 * Now AND with the create mode/directory mode bits then OR with the
1888 * force create mode/force directory mode bits.
1891 if (fsp->is_directory) {
1892 and_bits = lp_dir_security_mask(snum);
1893 or_bits = lp_force_dir_security_mode(snum);
1895 and_bits = lp_security_mask(snum);
1896 or_bits = lp_force_security_mode(snum);
1899 return ((mode & and_bits)|or_bits);
1902 /****************************************************************************
1903 Unpack a SEC_DESC into two canonical ace lists. We don't depend on this
1905 ****************************************************************************/
1907 static BOOL unpack_canon_ace(files_struct *fsp,
1908 SMB_STRUCT_STAT *pst,
1909 DOM_SID *pfile_owner_sid,
1910 DOM_SID *pfile_grp_sid,
1911 canon_ace **ppfile_ace, canon_ace **ppdir_ace,
1912 uint32 security_info_sent, SEC_DESC *psd)
1914 canon_ace *file_ace = NULL;
1915 canon_ace *dir_ace = NULL;
1920 if(security_info_sent == 0) {
1921 DEBUG(0,("unpack_canon_ace: no security info sent !\n"));
1926 * If no DACL then this is a chown only security descriptor.
1929 if(!(security_info_sent & DACL_SECURITY_INFORMATION) || !psd->dacl)
1933 * Now go through the DACL and create the canon_ace lists.
1936 if (!create_canon_ace_lists( fsp, pst, pfile_owner_sid, pfile_grp_sid,
1937 &file_ace, &dir_ace, psd->dacl))
1940 if ((file_ace == NULL) && (dir_ace == NULL)) {
1941 /* W2K traverse DACL set - ignore. */
1946 * Go through the canon_ace list and merge entries
1947 * belonging to identical users of identical allow or deny type.
1948 * We can do this as all deny entries come first, followed by
1949 * all allow entries (we have mandated this before accepting this acl).
1952 print_canon_ace_list( "file ace - before merge", file_ace);
1953 merge_aces( &file_ace );
1955 print_canon_ace_list( "dir ace - before merge", dir_ace);
1956 merge_aces( &dir_ace );
1959 * NT ACLs are order dependent. Go through the acl lists and
1960 * process DENY entries by masking the allow entries.
1963 print_canon_ace_list( "file ace - before deny", file_ace);
1964 process_deny_list( &file_ace);
1966 print_canon_ace_list( "dir ace - before deny", dir_ace);
1967 process_deny_list( &dir_ace);
1970 * A well formed POSIX file or default ACL has at least 3 entries, a
1971 * SMB_ACL_USER_OBJ, SMB_ACL_GROUP_OBJ, SMB_ACL_OTHER_OBJ
1972 * and optionally a mask entry. Ensure this is the case.
1975 print_canon_ace_list( "file ace - before valid", file_ace);
1978 * A default 3 element mode entry for a file should be r-- --- ---.
1979 * A default 3 element mode entry for a directory should be rwx --- ---.
1982 pst->st_mode = create_default_mode(fsp, False);
1984 if (!ensure_canon_entry_valid(&file_ace, fsp, pfile_owner_sid, pfile_grp_sid, pst, True)) {
1985 free_canon_ace_list(file_ace);
1986 free_canon_ace_list(dir_ace);
1990 print_canon_ace_list( "dir ace - before valid", dir_ace);
1993 * A default inheritable 3 element mode entry for a directory should be the
1994 * mode Samba will use to create a file within. Ensure user rwx bits are set if
1998 pst->st_mode = create_default_mode(fsp, True);
2000 if (dir_ace && !ensure_canon_entry_valid(&dir_ace, fsp, pfile_owner_sid, pfile_grp_sid, pst, True)) {
2001 free_canon_ace_list(file_ace);
2002 free_canon_ace_list(dir_ace);
2006 print_canon_ace_list( "file ace - return", file_ace);
2007 print_canon_ace_list( "dir ace - return", dir_ace);
2009 *ppfile_ace = file_ace;
2010 *ppdir_ace = dir_ace;
2015 /******************************************************************************
2016 When returning permissions, try and fit NT display
2017 semantics if possible. Note the the canon_entries here must have been malloced.
2018 The list format should be - first entry = owner, followed by group and other user
2019 entries, last entry = other.
2021 Note that this doesn't exactly match the NT semantics for an ACL. As POSIX entries
2022 are not ordered, and match on the most specific entry rather than walking a list,
2023 then a simple POSIX permission of rw-r--r-- should really map to 5 entries,
2025 Entry 0: owner : deny all except read and write.
2026 Entry 1: owner : allow read and write.
2027 Entry 2: group : deny all except read.
2028 Entry 3: group : allow read.
2029 Entry 4: Everyone : allow read.
2031 But NT cannot display this in their ACL editor !
2032 ********************************************************************************/
2034 static void arrange_posix_perms( char *filename, canon_ace **pp_list_head)
2036 canon_ace *list_head = *pp_list_head;
2037 canon_ace *owner_ace = NULL;
2038 canon_ace *other_ace = NULL;
2039 canon_ace *ace = NULL;
2041 for (ace = list_head; ace; ace = ace->next) {
2042 if (ace->type == SMB_ACL_USER_OBJ)
2044 else if (ace->type == SMB_ACL_OTHER) {
2045 /* Last ace - this is "other" */
2050 if (!owner_ace || !other_ace) {
2051 DEBUG(0,("arrange_posix_perms: Invalid POSIX permissions for file %s, missing owner or other.\n",
2057 * The POSIX algorithm applies to owner first, and other last,
2058 * so ensure they are arranged in this order.
2062 DLIST_PROMOTE(list_head, owner_ace);
2066 DLIST_DEMOTE(list_head, other_ace, canon_ace *);
2069 /* We have probably changed the head of the list. */
2071 *pp_list_head = list_head;
2074 /****************************************************************************
2075 Create a linked list of canonical ACE entries.
2076 ****************************************************************************/
2078 static canon_ace *canonicalise_acl( files_struct *fsp, SMB_ACL_T posix_acl, SMB_STRUCT_STAT *psbuf,
2079 const DOM_SID *powner, const DOM_SID *pgroup, struct pai_val *pal, SMB_ACL_TYPE_T the_acl_type)
2081 connection_struct *conn = fsp->conn;
2082 mode_t acl_mask = (S_IRUSR|S_IWUSR|S_IXUSR);
2083 canon_ace *list_head = NULL;
2084 canon_ace *ace = NULL;
2085 canon_ace *next_ace = NULL;
2086 int entry_id = SMB_ACL_FIRST_ENTRY;
2087 SMB_ACL_ENTRY_T entry;
2090 while ( posix_acl && (SMB_VFS_SYS_ACL_GET_ENTRY(conn, posix_acl, entry_id, &entry) == 1)) {
2091 SMB_ACL_TAG_T tagtype;
2092 SMB_ACL_PERMSET_T permset;
2095 enum ace_owner owner_type;
2098 if (entry_id == SMB_ACL_FIRST_ENTRY)
2099 entry_id = SMB_ACL_NEXT_ENTRY;
2101 /* Is this a MASK entry ? */
2102 if (SMB_VFS_SYS_ACL_GET_TAG_TYPE(conn, entry, &tagtype) == -1)
2105 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, entry, &permset) == -1)
2108 /* Decide which SID to use based on the ACL type. */
2110 case SMB_ACL_USER_OBJ:
2111 /* Get the SID from the owner. */
2112 sid_copy(&sid, powner);
2113 unix_ug.uid = psbuf->st_uid;
2114 owner_type = UID_ACE;
2118 uid_t *puid = (uid_t *)SMB_VFS_SYS_ACL_GET_QUALIFIER(conn, entry);
2120 DEBUG(0,("canonicalise_acl: Failed to get uid.\n"));
2124 * A SMB_ACL_USER entry for the owner is shadowed by the
2125 * SMB_ACL_USER_OBJ entry and Windows also cannot represent
2126 * that entry, so we ignore it. We also don't create such
2127 * entries out of the blue when setting ACLs, so a get/set
2128 * cycle will drop them.
2130 if (the_acl_type == SMB_ACL_TYPE_ACCESS && *puid == psbuf->st_uid) {
2131 SMB_VFS_SYS_ACL_FREE_QUALIFIER(conn, (void *)puid,tagtype);
2134 uid_to_sid( &sid, *puid);
2135 unix_ug.uid = *puid;
2136 owner_type = UID_ACE;
2137 SMB_VFS_SYS_ACL_FREE_QUALIFIER(conn, (void *)puid,tagtype);
2140 case SMB_ACL_GROUP_OBJ:
2141 /* Get the SID from the owning group. */
2142 sid_copy(&sid, pgroup);
2143 unix_ug.gid = psbuf->st_gid;
2144 owner_type = GID_ACE;
2148 gid_t *pgid = (gid_t *)SMB_VFS_SYS_ACL_GET_QUALIFIER(conn, entry);
2150 DEBUG(0,("canonicalise_acl: Failed to get gid.\n"));
2153 gid_to_sid( &sid, *pgid);
2154 unix_ug.gid = *pgid;
2155 owner_type = GID_ACE;
2156 SMB_VFS_SYS_ACL_FREE_QUALIFIER(conn, (void *)pgid,tagtype);
2160 acl_mask = convert_permset_to_mode_t(conn, permset);
2161 continue; /* Don't count the mask as an entry. */
2163 /* Use the Everyone SID */
2164 sid = global_sid_World;
2166 owner_type = WORLD_ACE;
2169 DEBUG(0,("canonicalise_acl: Unknown tagtype %u\n", (unsigned int)tagtype));
2174 * Add this entry to the list.
2177 if ((ace = SMB_MALLOC_P(canon_ace)) == NULL)
2181 ace->type = tagtype;
2182 ace->perms = convert_permset_to_mode_t(conn, permset);
2183 ace->attr = ALLOW_ACE;
2185 ace->unix_ug = unix_ug;
2186 ace->owner_type = owner_type;
2187 ace->inherited = get_inherited_flag(pal, ace, (the_acl_type == SMB_ACL_TYPE_DEFAULT));
2189 DLIST_ADD(list_head, ace);
2193 * This next call will ensure we have at least a user/group/world set.
2196 if (!ensure_canon_entry_valid(&list_head, fsp, powner, pgroup, psbuf, False))
2200 * Now go through the list, masking the permissions with the
2201 * acl_mask. Ensure all DENY Entries are at the start of the list.
2204 DEBUG(10,("canonicalise_acl: %s ace entries before arrange :\n", the_acl_type == SMB_ACL_TYPE_ACCESS ? "Access" : "Default" ));
2206 for ( ace_count = 0, ace = list_head; ace; ace = next_ace, ace_count++) {
2207 next_ace = ace->next;
2209 /* Masks are only applied to entries other than USER_OBJ and OTHER. */
2210 if (ace->type != SMB_ACL_OTHER && ace->type != SMB_ACL_USER_OBJ)
2211 ace->perms &= acl_mask;
2213 if (ace->perms == 0) {
2214 DLIST_PROMOTE(list_head, ace);
2217 if( DEBUGLVL( 10 ) ) {
2218 print_canon_ace(ace, ace_count);
2222 arrange_posix_perms(fsp->fsp_name,&list_head );
2224 print_canon_ace_list( "canonicalise_acl: ace entries after arrange", list_head );
2230 free_canon_ace_list(list_head);
2234 /****************************************************************************
2235 Check if the current user group list contains a given group.
2236 ****************************************************************************/
2238 static BOOL current_user_in_group(gid_t gid)
2242 for (i = 0; i < current_user.ut.ngroups; i++) {
2243 if (current_user.ut.groups[i] == gid) {
2251 /****************************************************************************
2252 Should we override a deny ? Check deprecated 'acl group control'
2254 ****************************************************************************/
2256 static BOOL acl_group_override(connection_struct *conn, gid_t prim_gid)
2258 if ( (errno == EACCES || errno == EPERM)
2259 && (lp_acl_group_control(SNUM(conn)) || lp_dos_filemode(SNUM(conn)))
2260 && current_user_in_group(prim_gid))
2268 /****************************************************************************
2269 Attempt to apply an ACL to a file or directory.
2270 ****************************************************************************/
2272 static BOOL set_canon_ace_list(files_struct *fsp, canon_ace *the_ace, BOOL default_ace, gid_t prim_gid, BOOL *pacl_set_support)
2274 connection_struct *conn = fsp->conn;
2276 SMB_ACL_T the_acl = SMB_VFS_SYS_ACL_INIT(conn, (int)count_canon_ace_list(the_ace) + 1);
2279 SMB_ACL_ENTRY_T mask_entry;
2280 BOOL got_mask_entry = False;
2281 SMB_ACL_PERMSET_T mask_permset;
2282 SMB_ACL_TYPE_T the_acl_type = (default_ace ? SMB_ACL_TYPE_DEFAULT : SMB_ACL_TYPE_ACCESS);
2283 BOOL needs_mask = False;
2284 mode_t mask_perms = 0;
2286 #if defined(POSIX_ACL_NEEDS_MASK)
2287 /* HP-UX always wants to have a mask (called "class" there). */
2291 if (the_acl == NULL) {
2293 if (!no_acl_syscall_error(errno)) {
2295 * Only print this error message if we have some kind of ACL
2296 * support that's not working. Otherwise we would always get this.
2298 DEBUG(0,("set_canon_ace_list: Unable to init %s ACL. (%s)\n",
2299 default_ace ? "default" : "file", strerror(errno) ));
2301 *pacl_set_support = False;
2305 if( DEBUGLVL( 10 )) {
2306 dbgtext("set_canon_ace_list: setting ACL:\n");
2307 for (i = 0, p_ace = the_ace; p_ace; p_ace = p_ace->next, i++ ) {
2308 print_canon_ace( p_ace, i);
2312 for (i = 0, p_ace = the_ace; p_ace; p_ace = p_ace->next, i++ ) {
2313 SMB_ACL_ENTRY_T the_entry;
2314 SMB_ACL_PERMSET_T the_permset;
2317 * ACLs only "need" an ACL_MASK entry if there are any named user or
2318 * named group entries. But if there is an ACL_MASK entry, it applies
2319 * to ACL_USER, ACL_GROUP, and ACL_GROUP_OBJ entries. Set the mask
2320 * so that it doesn't deny (i.e., mask off) any permissions.
2323 if (p_ace->type == SMB_ACL_USER || p_ace->type == SMB_ACL_GROUP) {
2325 mask_perms |= p_ace->perms;
2326 } else if (p_ace->type == SMB_ACL_GROUP_OBJ) {
2327 mask_perms |= p_ace->perms;
2331 * Get the entry for this ACE.
2334 if (SMB_VFS_SYS_ACL_CREATE_ENTRY(conn, &the_acl, &the_entry) == -1) {
2335 DEBUG(0,("set_canon_ace_list: Failed to create entry %d. (%s)\n",
2336 i, strerror(errno) ));
2340 if (p_ace->type == SMB_ACL_MASK) {
2341 mask_entry = the_entry;
2342 got_mask_entry = True;
2346 * Ok - we now know the ACL calls should be working, don't
2347 * allow fallback to chmod.
2350 *pacl_set_support = True;
2353 * Initialise the entry from the canon_ace.
2357 * First tell the entry what type of ACE this is.
2360 if (SMB_VFS_SYS_ACL_SET_TAG_TYPE(conn, the_entry, p_ace->type) == -1) {
2361 DEBUG(0,("set_canon_ace_list: Failed to set tag type on entry %d. (%s)\n",
2362 i, strerror(errno) ));
2367 * Only set the qualifier (user or group id) if the entry is a user
2371 if ((p_ace->type == SMB_ACL_USER) || (p_ace->type == SMB_ACL_GROUP)) {
2372 if (SMB_VFS_SYS_ACL_SET_QUALIFIER(conn, the_entry,(void *)&p_ace->unix_ug.uid) == -1) {
2373 DEBUG(0,("set_canon_ace_list: Failed to set qualifier on entry %d. (%s)\n",
2374 i, strerror(errno) ));
2380 * Convert the mode_t perms in the canon_ace to a POSIX permset.
2383 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, the_entry, &the_permset) == -1) {
2384 DEBUG(0,("set_canon_ace_list: Failed to get permset on entry %d. (%s)\n",
2385 i, strerror(errno) ));
2389 if (map_acl_perms_to_permset(conn, p_ace->perms, &the_permset) == -1) {
2390 DEBUG(0,("set_canon_ace_list: Failed to create permset for mode (%u) on entry %d. (%s)\n",
2391 (unsigned int)p_ace->perms, i, strerror(errno) ));
2396 * ..and apply them to the entry.
2399 if (SMB_VFS_SYS_ACL_SET_PERMSET(conn, the_entry, the_permset) == -1) {
2400 DEBUG(0,("set_canon_ace_list: Failed to add permset on entry %d. (%s)\n",
2401 i, strerror(errno) ));
2406 print_canon_ace( p_ace, i);
2410 if (needs_mask && !got_mask_entry) {
2411 if (SMB_VFS_SYS_ACL_CREATE_ENTRY(conn, &the_acl, &mask_entry) == -1) {
2412 DEBUG(0,("set_canon_ace_list: Failed to create mask entry. (%s)\n", strerror(errno) ));
2416 if (SMB_VFS_SYS_ACL_SET_TAG_TYPE(conn, mask_entry, SMB_ACL_MASK) == -1) {
2417 DEBUG(0,("set_canon_ace_list: Failed to set tag type on mask entry. (%s)\n",strerror(errno) ));
2421 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, mask_entry, &mask_permset) == -1) {
2422 DEBUG(0,("set_canon_ace_list: Failed to get mask permset. (%s)\n", strerror(errno) ));
2426 if (map_acl_perms_to_permset(conn, S_IRUSR|S_IWUSR|S_IXUSR, &mask_permset) == -1) {
2427 DEBUG(0,("set_canon_ace_list: Failed to create mask permset. (%s)\n", strerror(errno) ));
2431 if (SMB_VFS_SYS_ACL_SET_PERMSET(conn, mask_entry, mask_permset) == -1) {
2432 DEBUG(0,("set_canon_ace_list: Failed to add mask permset. (%s)\n", strerror(errno) ));
2438 * Finally apply it to the file or directory.
2441 if(default_ace || fsp->is_directory || fsp->fh->fd == -1) {
2442 if (SMB_VFS_SYS_ACL_SET_FILE(conn, fsp->fsp_name, the_acl_type, the_acl) == -1) {
2444 * Some systems allow all the above calls and only fail with no ACL support
2445 * when attempting to apply the acl. HPUX with HFS is an example of this. JRA.
2447 if (no_acl_syscall_error(errno)) {
2448 *pacl_set_support = False;
2451 if (acl_group_override(conn, prim_gid)) {
2454 DEBUG(5,("set_canon_ace_list: acl group control on and current user in file %s primary group.\n",
2458 sret = SMB_VFS_SYS_ACL_SET_FILE(conn, fsp->fsp_name, the_acl_type, the_acl);
2466 DEBUG(2,("set_canon_ace_list: sys_acl_set_file type %s failed for file %s (%s).\n",
2467 the_acl_type == SMB_ACL_TYPE_DEFAULT ? "directory default" : "file",
2468 fsp->fsp_name, strerror(errno) ));
2473 if (SMB_VFS_SYS_ACL_SET_FD(fsp, fsp->fh->fd, the_acl) == -1) {
2475 * Some systems allow all the above calls and only fail with no ACL support
2476 * when attempting to apply the acl. HPUX with HFS is an example of this. JRA.
2478 if (no_acl_syscall_error(errno)) {
2479 *pacl_set_support = False;
2482 if (acl_group_override(conn, prim_gid)) {
2485 DEBUG(5,("set_canon_ace_list: acl group control on and current user in file %s primary group.\n",
2489 sret = SMB_VFS_SYS_ACL_SET_FD(fsp, fsp->fh->fd, the_acl);
2497 DEBUG(2,("set_canon_ace_list: sys_acl_set_file failed for file %s (%s).\n",
2498 fsp->fsp_name, strerror(errno) ));
2508 if (the_acl != NULL) {
2509 SMB_VFS_SYS_ACL_FREE_ACL(conn, the_acl);
2515 /****************************************************************************
2516 Find a particular canon_ace entry.
2517 ****************************************************************************/
2519 static struct canon_ace *canon_ace_entry_for(struct canon_ace *list, SMB_ACL_TAG_T type, posix_id *id)
2522 if (list->type == type && ((type != SMB_ACL_USER && type != SMB_ACL_GROUP) ||
2523 (type == SMB_ACL_USER && id && id->uid == list->unix_ug.uid) ||
2524 (type == SMB_ACL_GROUP && id && id->gid == list->unix_ug.gid)))
2531 /****************************************************************************
2533 ****************************************************************************/
2535 SMB_ACL_T free_empty_sys_acl(connection_struct *conn, SMB_ACL_T the_acl)
2537 SMB_ACL_ENTRY_T entry;
2541 if (SMB_VFS_SYS_ACL_GET_ENTRY(conn, the_acl, SMB_ACL_FIRST_ENTRY, &entry) != 1) {
2542 SMB_VFS_SYS_ACL_FREE_ACL(conn, the_acl);
2548 /****************************************************************************
2549 Convert a canon_ace to a generic 3 element permission - if possible.
2550 ****************************************************************************/
2552 #define MAP_PERM(p,mask,result) (((p) & (mask)) ? (result) : 0 )
2554 static BOOL convert_canon_ace_to_posix_perms( files_struct *fsp, canon_ace *file_ace_list, mode_t *posix_perms)
2556 int snum = SNUM(fsp->conn);
2557 size_t ace_count = count_canon_ace_list(file_ace_list);
2559 canon_ace *owner_ace = NULL;
2560 canon_ace *group_ace = NULL;
2561 canon_ace *other_ace = NULL;
2565 if (ace_count != 3) {
2566 DEBUG(3,("convert_canon_ace_to_posix_perms: Too many ACE entries for file %s to convert to \
2567 posix perms.\n", fsp->fsp_name ));
2571 for (ace_p = file_ace_list; ace_p; ace_p = ace_p->next) {
2572 if (ace_p->owner_type == UID_ACE)
2574 else if (ace_p->owner_type == GID_ACE)
2576 else if (ace_p->owner_type == WORLD_ACE)
2580 if (!owner_ace || !group_ace || !other_ace) {
2581 DEBUG(3,("convert_canon_ace_to_posix_perms: Can't get standard entries for file %s.\n",
2586 *posix_perms = (mode_t)0;
2588 *posix_perms |= owner_ace->perms;
2589 *posix_perms |= MAP_PERM(group_ace->perms, S_IRUSR, S_IRGRP);
2590 *posix_perms |= MAP_PERM(group_ace->perms, S_IWUSR, S_IWGRP);
2591 *posix_perms |= MAP_PERM(group_ace->perms, S_IXUSR, S_IXGRP);
2592 *posix_perms |= MAP_PERM(other_ace->perms, S_IRUSR, S_IROTH);
2593 *posix_perms |= MAP_PERM(other_ace->perms, S_IWUSR, S_IWOTH);
2594 *posix_perms |= MAP_PERM(other_ace->perms, S_IXUSR, S_IXOTH);
2596 /* The owner must have at least read access. */
2598 *posix_perms |= S_IRUSR;
2599 if (fsp->is_directory)
2600 *posix_perms |= (S_IWUSR|S_IXUSR);
2602 /* If requested apply the masks. */
2604 /* Get the initial bits to apply. */
2606 if (fsp->is_directory) {
2607 and_bits = lp_dir_security_mask(snum);
2608 or_bits = lp_force_dir_security_mode(snum);
2610 and_bits = lp_security_mask(snum);
2611 or_bits = lp_force_security_mode(snum);
2614 *posix_perms = (((*posix_perms) & and_bits)|or_bits);
2616 DEBUG(10,("convert_canon_ace_to_posix_perms: converted u=%o,g=%o,w=%o to perm=0%o for file %s.\n",
2617 (int)owner_ace->perms, (int)group_ace->perms, (int)other_ace->perms, (int)*posix_perms,
2623 /****************************************************************************
2624 Incoming NT ACLs on a directory can be split into a default POSIX acl (CI|OI|IO) and
2625 a normal POSIX acl. Win2k needs these split acls re-merging into one ACL
2626 with CI|OI set so it is inherited and also applies to the directory.
2627 Based on code from "Jim McDonough" <jmcd@us.ibm.com>.
2628 ****************************************************************************/
2630 static size_t merge_default_aces( SEC_ACE *nt_ace_list, size_t num_aces)
2634 for (i = 0; i < num_aces; i++) {
2635 for (j = i+1; j < num_aces; j++) {
2636 uint32 i_flags_ni = (nt_ace_list[i].flags & ~SEC_ACE_FLAG_INHERITED_ACE);
2637 uint32 j_flags_ni = (nt_ace_list[j].flags & ~SEC_ACE_FLAG_INHERITED_ACE);
2638 BOOL i_inh = (nt_ace_list[i].flags & SEC_ACE_FLAG_INHERITED_ACE) ? True : False;
2639 BOOL j_inh = (nt_ace_list[j].flags & SEC_ACE_FLAG_INHERITED_ACE) ? True : False;
2641 /* We know the lower number ACE's are file entries. */
2642 if ((nt_ace_list[i].type == nt_ace_list[j].type) &&
2643 (nt_ace_list[i].size == nt_ace_list[j].size) &&
2644 (nt_ace_list[i].access_mask == nt_ace_list[j].access_mask) &&
2645 sid_equal(&nt_ace_list[i].trustee, &nt_ace_list[j].trustee) &&
2647 (i_flags_ni == 0) &&
2648 (j_flags_ni == (SEC_ACE_FLAG_OBJECT_INHERIT|
2649 SEC_ACE_FLAG_CONTAINER_INHERIT|
2650 SEC_ACE_FLAG_INHERIT_ONLY))) {
2652 * W2K wants to have access allowed zero access ACE's
2653 * at the end of the list. If the mask is zero, merge
2654 * the non-inherited ACE onto the inherited ACE.
2657 if (nt_ace_list[i].access_mask == 0) {
2658 nt_ace_list[j].flags = SEC_ACE_FLAG_OBJECT_INHERIT|SEC_ACE_FLAG_CONTAINER_INHERIT|
2659 (i_inh ? SEC_ACE_FLAG_INHERITED_ACE : 0);
2660 if (num_aces - i - 1 > 0)
2661 memmove(&nt_ace_list[i], &nt_ace_list[i+1], (num_aces-i-1) *
2664 DEBUG(10,("merge_default_aces: Merging zero access ACE %u onto ACE %u.\n",
2665 (unsigned int)i, (unsigned int)j ));
2668 * These are identical except for the flags.
2669 * Merge the inherited ACE onto the non-inherited ACE.
2672 nt_ace_list[i].flags = SEC_ACE_FLAG_OBJECT_INHERIT|SEC_ACE_FLAG_CONTAINER_INHERIT|
2673 (i_inh ? SEC_ACE_FLAG_INHERITED_ACE : 0);
2674 if (num_aces - j - 1 > 0)
2675 memmove(&nt_ace_list[j], &nt_ace_list[j+1], (num_aces-j-1) *
2678 DEBUG(10,("merge_default_aces: Merging ACE %u onto ACE %u.\n",
2679 (unsigned int)j, (unsigned int)i ));
2689 /****************************************************************************
2690 Reply to query a security descriptor from an fsp. If it succeeds it allocates
2691 the space for the return elements and returns the size needed to return the
2692 security descriptor. This should be the only external function needed for
2693 the UNIX style get ACL.
2694 ****************************************************************************/
2696 size_t get_nt_acl(files_struct *fsp, uint32 security_info, SEC_DESC **ppdesc)
2698 connection_struct *conn = fsp->conn;
2699 SMB_STRUCT_STAT sbuf;
2700 SEC_ACE *nt_ace_list = NULL;
2704 SEC_ACL *psa = NULL;
2705 size_t num_acls = 0;
2706 size_t num_def_acls = 0;
2707 size_t num_aces = 0;
2708 SMB_ACL_T posix_acl = NULL;
2709 SMB_ACL_T def_acl = NULL;
2710 canon_ace *file_ace = NULL;
2711 canon_ace *dir_ace = NULL;
2712 size_t num_profile_acls = 0;
2713 struct pai_val *pal = NULL;
2714 SEC_DESC *psd = NULL;
2718 DEBUG(10,("get_nt_acl: called for file %s\n", fsp->fsp_name ));
2720 if(fsp->is_directory || fsp->fh->fd == -1) {
2722 /* Get the stat struct for the owner info. */
2723 if(SMB_VFS_STAT(fsp->conn,fsp->fsp_name, &sbuf) != 0) {
2727 * Get the ACL from the path.
2730 posix_acl = SMB_VFS_SYS_ACL_GET_FILE(conn, fsp->fsp_name, SMB_ACL_TYPE_ACCESS);
2733 * If it's a directory get the default POSIX ACL.
2736 if(fsp->is_directory) {
2737 def_acl = SMB_VFS_SYS_ACL_GET_FILE(conn, fsp->fsp_name, SMB_ACL_TYPE_DEFAULT);
2738 def_acl = free_empty_sys_acl(conn, def_acl);
2743 /* Get the stat struct for the owner info. */
2744 if(SMB_VFS_FSTAT(fsp,fsp->fh->fd,&sbuf) != 0) {
2748 * Get the ACL from the fd.
2750 posix_acl = SMB_VFS_SYS_ACL_GET_FD(fsp, fsp->fh->fd);
2753 DEBUG(5,("get_nt_acl : file ACL %s, directory ACL %s\n",
2754 posix_acl ? "present" : "absent",
2755 def_acl ? "present" : "absent" ));
2757 pal = load_inherited_info(fsp);
2760 * Get the owner, group and world SIDs.
2763 if (lp_profile_acls(SNUM(conn))) {
2764 /* For WXP SP1 the owner must be administrators. */
2765 sid_copy(&owner_sid, &global_sid_Builtin_Administrators);
2766 sid_copy(&group_sid, &global_sid_Builtin_Users);
2767 num_profile_acls = 2;
2769 create_file_sids(&sbuf, &owner_sid, &group_sid);
2772 if ((security_info & DACL_SECURITY_INFORMATION) && !(security_info & PROTECTED_DACL_SECURITY_INFORMATION)) {
2775 * In the optimum case Creator Owner and Creator Group would be used for
2776 * the ACL_USER_OBJ and ACL_GROUP_OBJ entries, respectively, but this
2777 * would lead to usability problems under Windows: The Creator entries
2778 * are only available in browse lists of directories and not for files;
2779 * additionally the identity of the owning group couldn't be determined.
2780 * We therefore use those identities only for Default ACLs.
2783 /* Create the canon_ace lists. */
2784 file_ace = canonicalise_acl( fsp, posix_acl, &sbuf, &owner_sid, &group_sid, pal, SMB_ACL_TYPE_ACCESS );
2786 /* We must have *some* ACLS. */
2788 if (count_canon_ace_list(file_ace) == 0) {
2789 DEBUG(0,("get_nt_acl : No ACLs on file (%s) !\n", fsp->fsp_name ));
2793 if (fsp->is_directory && def_acl) {
2794 dir_ace = canonicalise_acl(fsp, def_acl, &sbuf,
2795 &global_sid_Creator_Owner,
2796 &global_sid_Creator_Group, pal, SMB_ACL_TYPE_DEFAULT );
2800 * Create the NT ACE list from the canonical ace lists.
2808 if (nt4_compatible_acls() && dir_ace) {
2810 * NT 4 chokes if an ACL contains an INHERIT_ONLY entry
2811 * but no non-INHERIT_ONLY entry for one SID. So we only
2812 * remove entries from the Access ACL if the
2813 * corresponding Default ACL entries have also been
2814 * removed. ACEs for CREATOR-OWNER and CREATOR-GROUP
2815 * are exceptions. We can do nothing
2816 * intelligent if the Default ACL contains entries that
2817 * are not also contained in the Access ACL, so this
2818 * case will still fail under NT 4.
2821 ace = canon_ace_entry_for(dir_ace, SMB_ACL_OTHER, NULL);
2822 if (ace && !ace->perms) {
2823 DLIST_REMOVE(dir_ace, ace);
2826 ace = canon_ace_entry_for(file_ace, SMB_ACL_OTHER, NULL);
2827 if (ace && !ace->perms) {
2828 DLIST_REMOVE(file_ace, ace);
2834 * WinNT doesn't usually have Creator Group
2835 * in browse lists, so we send this entry to
2836 * WinNT even if it contains no relevant
2837 * permissions. Once we can add
2838 * Creator Group to browse lists we can
2843 ace = canon_ace_entry_for(dir_ace, SMB_ACL_GROUP_OBJ, NULL);
2844 if (ace && !ace->perms) {
2845 DLIST_REMOVE(dir_ace, ace);
2850 ace = canon_ace_entry_for(file_ace, SMB_ACL_GROUP_OBJ, NULL);
2851 if (ace && !ace->perms) {
2852 DLIST_REMOVE(file_ace, ace);
2857 num_acls = count_canon_ace_list(file_ace);
2858 num_def_acls = count_canon_ace_list(dir_ace);
2860 /* Allocate the ace list. */
2861 if ((nt_ace_list = SMB_MALLOC_ARRAY(SEC_ACE,num_acls + num_profile_acls + num_def_acls)) == NULL) {
2862 DEBUG(0,("get_nt_acl: Unable to malloc space for nt_ace_list.\n"));
2866 memset(nt_ace_list, '\0', (num_acls + num_def_acls) * sizeof(SEC_ACE) );
2869 * Create the NT ACE list from the canonical ace lists.
2874 for (i = 0; i < num_acls; i++, ace = ace->next) {
2877 acc = map_canon_ace_perms(SNUM(conn), &nt_acl_type, &owner_sid, ace, fsp->is_directory);
2878 init_sec_ace(&nt_ace_list[num_aces++], &ace->trustee, nt_acl_type, acc, ace->inherited ? SEC_ACE_FLAG_INHERITED_ACE : 0);
2881 /* The User must have access to a profile share - even if we can't map the SID. */
2882 if (lp_profile_acls(SNUM(conn))) {
2885 init_sec_access(&acc,FILE_GENERIC_ALL);
2886 init_sec_ace(&nt_ace_list[num_aces++], &global_sid_Builtin_Users, SEC_ACE_TYPE_ACCESS_ALLOWED,
2892 for (i = 0; i < num_def_acls; i++, ace = ace->next) {
2895 acc = map_canon_ace_perms(SNUM(conn), &nt_acl_type, &owner_sid, ace, fsp->is_directory);
2896 init_sec_ace(&nt_ace_list[num_aces++], &ace->trustee, nt_acl_type, acc,
2897 SEC_ACE_FLAG_OBJECT_INHERIT|SEC_ACE_FLAG_CONTAINER_INHERIT|
2898 SEC_ACE_FLAG_INHERIT_ONLY|
2899 (ace->inherited ? SEC_ACE_FLAG_INHERITED_ACE : 0));
2902 /* The User must have access to a profile share - even if we can't map the SID. */
2903 if (lp_profile_acls(SNUM(conn))) {
2906 init_sec_access(&acc,FILE_GENERIC_ALL);
2907 init_sec_ace(&nt_ace_list[num_aces++], &global_sid_Builtin_Users, SEC_ACE_TYPE_ACCESS_ALLOWED, acc,
2908 SEC_ACE_FLAG_OBJECT_INHERIT|SEC_ACE_FLAG_CONTAINER_INHERIT|
2909 SEC_ACE_FLAG_INHERIT_ONLY|0);
2913 * Merge POSIX default ACLs and normal ACLs into one NT ACE.
2914 * Win2K needs this to get the inheritance correct when replacing ACLs
2915 * on a directory tree. Based on work by Jim @ IBM.
2918 num_aces = merge_default_aces(nt_ace_list, num_aces);
2923 if((psa = make_sec_acl( main_loop_talloc_get(), NT4_ACL_REVISION, num_aces, nt_ace_list)) == NULL) {
2924 DEBUG(0,("get_nt_acl: Unable to malloc space for acl.\n"));
2928 } /* security_info & DACL_SECURITY_INFORMATION */
2930 psd = make_standard_sec_desc( main_loop_talloc_get(),
2931 (security_info & OWNER_SECURITY_INFORMATION) ? &owner_sid : NULL,
2932 (security_info & GROUP_SECURITY_INFORMATION) ? &group_sid : NULL,
2937 DEBUG(0,("get_nt_acl: Unable to malloc space for security descriptor.\n"));
2943 * Windows 2000: The DACL_PROTECTED flag in the security
2944 * descriptor marks the ACL as non-inheriting, i.e., no
2945 * ACEs from higher level directories propagate to this
2946 * ACL. In the POSIX ACL model permissions are only
2947 * inherited at file create time, so ACLs never contain
2948 * any ACEs that are inherited dynamically. The DACL_PROTECTED
2949 * flag doesn't seem to bother Windows NT.
2950 * Always set this if map acl inherit is turned off.
2952 if (get_protected_flag(pal) || !lp_map_acl_inherit(SNUM(conn))) {
2953 psd->type |= SE_DESC_DACL_PROTECTED;
2957 dacl_sort_into_canonical_order(psd->dacl->aces, (unsigned int)psd->dacl->num_aces);
2965 SMB_VFS_SYS_ACL_FREE_ACL(conn, posix_acl);
2968 SMB_VFS_SYS_ACL_FREE_ACL(conn, def_acl);
2970 free_canon_ace_list(file_ace);
2971 free_canon_ace_list(dir_ace);
2972 free_inherited_info(pal);
2973 SAFE_FREE(nt_ace_list);
2978 /****************************************************************************
2979 Try to chown a file. We will be able to chown it under the following conditions.
2981 1) If we have root privileges, then it will just work.
2982 2) If we have SeTakeOwnershipPrivilege we can change the user to the current user.
2983 3) If we have SeRestorePrivilege we can change the user to any other user.
2984 4) If we have write permission to the file and dos_filemodes is set
2985 then allow chown to the currently authenticated user.
2986 ****************************************************************************/
2988 int try_chown(connection_struct *conn, const char *fname, uid_t uid, gid_t gid)
2994 if(!CAN_WRITE(conn)) {
2999 /* try the direct way first */
3000 ret = SMB_VFS_CHOWN(conn, fname, uid, gid);
3004 /* Case (2) / (3) */
3005 if (lp_enable_privileges()) {
3007 BOOL has_take_ownership_priv = user_has_privileges(current_user.nt_user_token,
3008 &se_take_ownership);
3009 BOOL has_restore_priv = user_has_privileges(current_user.nt_user_token,
3013 if ( ( has_take_ownership_priv && ( uid == current_user.ut.uid ) ) ||
3015 ( has_restore_priv ) ) {
3018 /* Keep the current file gid the same - take ownership doesn't imply group change. */
3019 ret = SMB_VFS_CHOWN(conn, fname, uid, (gid_t)-1);
3026 if (!lp_dos_filemode(SNUM(conn))) {
3030 if (SMB_VFS_STAT(conn,fname,&st)) {
3034 if (!NT_STATUS_IS_OK(open_file_fchmod(conn,fname,&st,&fsp))) {
3038 /* only allow chown to the current user. This is more secure,
3039 and also copes with the case where the SID in a take ownership ACL is
3040 a local SID on the users workstation
3042 uid = current_user.ut.uid;
3045 /* Keep the current file gid the same. */
3046 ret = SMB_VFS_FCHOWN(fsp, fsp->fh->fd, uid, (gid_t)-1);
3049 close_file_fchmod(fsp);
3054 /****************************************************************************
3055 Reply to set a security descriptor on an fsp. security_info_sent is the
3056 description of the following NT ACL.
3057 This should be the only external function needed for the UNIX style set ACL.
3058 ****************************************************************************/
3060 BOOL set_nt_acl(files_struct *fsp, uint32 security_info_sent, SEC_DESC *psd)
3062 connection_struct *conn = fsp->conn;
3063 uid_t user = (uid_t)-1;
3064 gid_t grp = (gid_t)-1;
3065 SMB_STRUCT_STAT sbuf;
3066 DOM_SID file_owner_sid;
3067 DOM_SID file_grp_sid;
3068 canon_ace *file_ace_list = NULL;
3069 canon_ace *dir_ace_list = NULL;
3070 BOOL acl_perms = False;
3071 mode_t orig_mode = (mode_t)0;
3074 BOOL need_chown = False;
3076 DEBUG(10,("set_nt_acl: called for file %s\n", fsp->fsp_name ));
3078 if (!CAN_WRITE(conn)) {
3079 DEBUG(10,("set acl rejected on read-only share\n"));
3084 * Get the current state of the file.
3087 if(fsp->is_directory || fsp->fh->fd == -1) {
3088 if(SMB_VFS_STAT(fsp->conn,fsp->fsp_name, &sbuf) != 0)
3091 if(SMB_VFS_FSTAT(fsp,fsp->fh->fd,&sbuf) != 0)
3095 /* Save the original elements we check against. */
3096 orig_mode = sbuf.st_mode;
3097 orig_uid = sbuf.st_uid;
3098 orig_gid = sbuf.st_gid;
3101 * Unpack the user/group/world id's.
3104 if (!unpack_nt_owners( SNUM(conn), &user, &grp, security_info_sent, psd)) {
3109 * Do we need to chown ?
3112 if (((user != (uid_t)-1) && (orig_uid != user)) || (( grp != (gid_t)-1) && (orig_gid != grp))) {
3117 * Chown before setting ACL only if we don't change the user, or
3118 * if we change to the current user, but not if we want to give away
3122 if (need_chown && (user == (uid_t)-1 || user == current_user.ut.uid)) {
3124 DEBUG(3,("set_nt_acl: chown %s. uid = %u, gid = %u.\n",
3125 fsp->fsp_name, (unsigned int)user, (unsigned int)grp ));
3127 if(try_chown( fsp->conn, fsp->fsp_name, user, grp) == -1) {
3128 DEBUG(3,("set_nt_acl: chown %s, %u, %u failed. Error = %s.\n",
3129 fsp->fsp_name, (unsigned int)user, (unsigned int)grp, strerror(errno) ));
3134 * Recheck the current state of the file, which may have changed.
3135 * (suid/sgid bits, for instance)
3138 if(fsp->is_directory) {
3139 if(SMB_VFS_STAT(fsp->conn, fsp->fsp_name, &sbuf) != 0) {
3146 if(fsp->fh->fd == -1)
3147 ret = SMB_VFS_STAT(fsp->conn, fsp->fsp_name, &sbuf);
3149 ret = SMB_VFS_FSTAT(fsp,fsp->fh->fd,&sbuf);
3155 /* Save the original elements we check against. */
3156 orig_mode = sbuf.st_mode;
3157 orig_uid = sbuf.st_uid;
3158 orig_gid = sbuf.st_gid;
3160 /* We did it, don't try again */
3164 create_file_sids(&sbuf, &file_owner_sid, &file_grp_sid);
3166 acl_perms = unpack_canon_ace( fsp, &sbuf, &file_owner_sid, &file_grp_sid,
3167 &file_ace_list, &dir_ace_list, security_info_sent, psd);
3169 /* Ignore W2K traverse DACL set. */
3170 if (file_ace_list || dir_ace_list) {
3173 DEBUG(3,("set_nt_acl: cannot set permissions\n"));
3174 free_canon_ace_list(file_ace_list);
3175 free_canon_ace_list(dir_ace_list);
3180 * Only change security if we got a DACL.
3183 if((security_info_sent & DACL_SECURITY_INFORMATION) && (psd->dacl != NULL)) {
3185 BOOL acl_set_support = False;
3189 * Try using the POSIX ACL set first. Fall back to chmod if
3190 * we have no ACL support on this filesystem.
3193 if (acl_perms && file_ace_list) {
3194 ret = set_canon_ace_list(fsp, file_ace_list, False, sbuf.st_gid, &acl_set_support);
3195 if (acl_set_support && ret == False) {
3196 DEBUG(3,("set_nt_acl: failed to set file acl on file %s (%s).\n", fsp->fsp_name, strerror(errno) ));
3197 free_canon_ace_list(file_ace_list);
3198 free_canon_ace_list(dir_ace_list);
3203 if (acl_perms && acl_set_support && fsp->is_directory) {
3205 if (!set_canon_ace_list(fsp, dir_ace_list, True, sbuf.st_gid, &acl_set_support)) {
3206 DEBUG(3,("set_nt_acl: failed to set default acl on directory %s (%s).\n", fsp->fsp_name, strerror(errno) ));
3207 free_canon_ace_list(file_ace_list);
3208 free_canon_ace_list(dir_ace_list);
3214 * No default ACL - delete one if it exists.
3217 if (SMB_VFS_SYS_ACL_DELETE_DEF_FILE(conn, fsp->fsp_name) == -1) {
3220 if (acl_group_override(conn, sbuf.st_gid)) {
3221 DEBUG(5,("set_nt_acl: acl group control on and "
3222 "current user in file %s primary group. Override delete_def_acl\n",
3226 sret = SMB_VFS_SYS_ACL_DELETE_DEF_FILE(conn, fsp->fsp_name);
3231 DEBUG(3,("set_nt_acl: sys_acl_delete_def_file failed (%s)\n", strerror(errno)));
3232 free_canon_ace_list(file_ace_list);
3233 free_canon_ace_list(dir_ace_list);
3240 if (acl_set_support) {
3241 store_inheritance_attributes(fsp, file_ace_list, dir_ace_list,
3242 (psd->type & SE_DESC_DACL_PROTECTED) ? True : False);
3246 * If we cannot set using POSIX ACLs we fall back to checking if we need to chmod.
3249 if(!acl_set_support && acl_perms) {
3252 if (!convert_canon_ace_to_posix_perms( fsp, file_ace_list, &posix_perms)) {
3253 free_canon_ace_list(file_ace_list);
3254 free_canon_ace_list(dir_ace_list);
3255 DEBUG(3,("set_nt_acl: failed to convert file acl to posix permissions for file %s.\n",
3260 if (orig_mode != posix_perms) {
3262 DEBUG(3,("set_nt_acl: chmod %s. perms = 0%o.\n",
3263 fsp->fsp_name, (unsigned int)posix_perms ));
3265 if(SMB_VFS_CHMOD(conn,fsp->fsp_name, posix_perms) == -1) {
3267 if (acl_group_override(conn, sbuf.st_gid)) {
3268 DEBUG(5,("set_nt_acl: acl group control on and "
3269 "current user in file %s primary group. Override chmod\n",
3273 sret = SMB_VFS_CHMOD(conn,fsp->fsp_name, posix_perms);
3278 DEBUG(3,("set_nt_acl: chmod %s, 0%o failed. Error = %s.\n",
3279 fsp->fsp_name, (unsigned int)posix_perms, strerror(errno) ));
3280 free_canon_ace_list(file_ace_list);
3281 free_canon_ace_list(dir_ace_list);
3289 free_canon_ace_list(file_ace_list);
3290 free_canon_ace_list(dir_ace_list);
3293 /* Any chown pending? */
3296 DEBUG(3,("set_nt_acl: chown %s. uid = %u, gid = %u.\n",
3297 fsp->fsp_name, (unsigned int)user, (unsigned int)grp ));
3299 if(try_chown( fsp->conn, fsp->fsp_name, user, grp) == -1) {
3300 DEBUG(3,("set_nt_acl: chown %s, %u, %u failed. Error = %s.\n",
3301 fsp->fsp_name, (unsigned int)user, (unsigned int)grp, strerror(errno) ));
3309 /****************************************************************************
3310 Get the actual group bits stored on a file with an ACL. Has no effect if
3311 the file has no ACL. Needed in dosmode code where the stat() will return
3312 the mask bits, not the real group bits, for a file with an ACL.
3313 ****************************************************************************/
3315 int get_acl_group_bits( connection_struct *conn, const char *fname, mode_t *mode )
3317 int entry_id = SMB_ACL_FIRST_ENTRY;
3318 SMB_ACL_ENTRY_T entry;
3319 SMB_ACL_T posix_acl;
3322 posix_acl = SMB_VFS_SYS_ACL_GET_FILE(conn, fname, SMB_ACL_TYPE_ACCESS);
3323 if (posix_acl == (SMB_ACL_T)NULL)
3326 while (SMB_VFS_SYS_ACL_GET_ENTRY(conn, posix_acl, entry_id, &entry) == 1) {
3327 SMB_ACL_TAG_T tagtype;
3328 SMB_ACL_PERMSET_T permset;
3331 if (entry_id == SMB_ACL_FIRST_ENTRY)
3332 entry_id = SMB_ACL_NEXT_ENTRY;
3334 if (SMB_VFS_SYS_ACL_GET_TAG_TYPE(conn, entry, &tagtype) ==-1)
3337 if (tagtype == SMB_ACL_GROUP_OBJ) {
3338 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, entry, &permset) == -1) {
3341 *mode &= ~(S_IRGRP|S_IWGRP|S_IXGRP);
3342 *mode |= (SMB_VFS_SYS_ACL_GET_PERM(conn, permset, SMB_ACL_READ) ? S_IRGRP : 0);
3343 *mode |= (SMB_VFS_SYS_ACL_GET_PERM(conn, permset, SMB_ACL_WRITE) ? S_IWGRP : 0);
3344 *mode |= (SMB_VFS_SYS_ACL_GET_PERM(conn, permset, SMB_ACL_EXECUTE) ? S_IXGRP : 0);
3350 SMB_VFS_SYS_ACL_FREE_ACL(conn, posix_acl);
3354 /****************************************************************************
3355 Do a chmod by setting the ACL USER_OBJ, GROUP_OBJ and OTHER bits in an ACL
3356 and set the mask to rwx. Needed to preserve complex ACLs set by NT.
3357 ****************************************************************************/
3359 static int chmod_acl_internals( connection_struct *conn, SMB_ACL_T posix_acl, mode_t mode)
3361 int entry_id = SMB_ACL_FIRST_ENTRY;
3362 SMB_ACL_ENTRY_T entry;
3363 int num_entries = 0;
3365 while ( SMB_VFS_SYS_ACL_GET_ENTRY(conn, posix_acl, entry_id, &entry) == 1) {
3366 SMB_ACL_TAG_T tagtype;
3367 SMB_ACL_PERMSET_T permset;
3371 if (entry_id == SMB_ACL_FIRST_ENTRY)
3372 entry_id = SMB_ACL_NEXT_ENTRY;
3374 if (SMB_VFS_SYS_ACL_GET_TAG_TYPE(conn, entry, &tagtype) == -1)
3377 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, entry, &permset) == -1)
3383 case SMB_ACL_USER_OBJ:
3384 perms = unix_perms_to_acl_perms(mode, S_IRUSR, S_IWUSR, S_IXUSR);
3386 case SMB_ACL_GROUP_OBJ:
3387 perms = unix_perms_to_acl_perms(mode, S_IRGRP, S_IWGRP, S_IXGRP);
3391 * FIXME: The ACL_MASK entry permissions should really be set to
3392 * the union of the permissions of all ACL_USER,
3393 * ACL_GROUP_OBJ, and ACL_GROUP entries. That's what
3394 * acl_calc_mask() does, but Samba ACLs doesn't provide it.
3396 perms = S_IRUSR|S_IWUSR|S_IXUSR;
3399 perms = unix_perms_to_acl_perms(mode, S_IROTH, S_IWOTH, S_IXOTH);
3405 if (map_acl_perms_to_permset(conn, perms, &permset) == -1)
3408 if (SMB_VFS_SYS_ACL_SET_PERMSET(conn, entry, permset) == -1)
3413 * If this is a simple 3 element ACL or no elements then it's a standard
3414 * UNIX permission set. Just use chmod...
3417 if ((num_entries == 3) || (num_entries == 0))
3423 /****************************************************************************
3424 Get the access ACL of FROM, do a chmod by setting the ACL USER_OBJ,
3425 GROUP_OBJ and OTHER bits in an ACL and set the mask to rwx. Set the
3426 resulting ACL on TO. Note that name is in UNIX character set.
3427 ****************************************************************************/
3429 static int copy_access_acl(connection_struct *conn, const char *from, const char *to, mode_t mode)
3431 SMB_ACL_T posix_acl = NULL;
3434 if ((posix_acl = SMB_VFS_SYS_ACL_GET_FILE(conn, from, SMB_ACL_TYPE_ACCESS)) == NULL)
3437 if ((ret = chmod_acl_internals(conn, posix_acl, mode)) == -1)
3440 ret = SMB_VFS_SYS_ACL_SET_FILE(conn, to, SMB_ACL_TYPE_ACCESS, posix_acl);
3444 SMB_VFS_SYS_ACL_FREE_ACL(conn, posix_acl);
3448 /****************************************************************************
3449 Do a chmod by setting the ACL USER_OBJ, GROUP_OBJ and OTHER bits in an ACL
3450 and set the mask to rwx. Needed to preserve complex ACLs set by NT.
3451 Note that name is in UNIX character set.
3452 ****************************************************************************/
3454 int chmod_acl(connection_struct *conn, const char *name, mode_t mode)
3456 return copy_access_acl(conn, name, name, mode);
3459 /****************************************************************************
3460 If the parent directory has no default ACL but it does have an Access ACL,
3461 inherit this Access ACL to file name.
3462 ****************************************************************************/
3464 int inherit_access_acl(connection_struct *conn, const char *name, mode_t mode)
3467 pstrcpy(dirname, parent_dirname(name));
3469 if (directory_has_default_acl(conn, dirname))
3472 return copy_access_acl(conn, dirname, name, mode);
3475 /****************************************************************************
3476 Do an fchmod by setting the ACL USER_OBJ, GROUP_OBJ and OTHER bits in an ACL
3477 and set the mask to rwx. Needed to preserve complex ACLs set by NT.
3478 ****************************************************************************/
3480 int fchmod_acl(files_struct *fsp, int fd, mode_t mode)
3482 connection_struct *conn = fsp->conn;
3483 SMB_ACL_T posix_acl = NULL;
3486 if ((posix_acl = SMB_VFS_SYS_ACL_GET_FD(fsp, fd)) == NULL)
3489 if ((ret = chmod_acl_internals(conn, posix_acl, mode)) == -1)
3492 ret = SMB_VFS_SYS_ACL_SET_FD(fsp, fd, posix_acl);
3496 SMB_VFS_SYS_ACL_FREE_ACL(conn, posix_acl);
3500 /****************************************************************************
3501 Check for an existing default POSIX ACL on a directory.
3502 ****************************************************************************/
3504 BOOL directory_has_default_acl(connection_struct *conn, const char *fname)
3506 SMB_ACL_T def_acl = SMB_VFS_SYS_ACL_GET_FILE( conn, fname, SMB_ACL_TYPE_DEFAULT);
3507 BOOL has_acl = False;
3508 SMB_ACL_ENTRY_T entry;
3510 if (def_acl != NULL && (SMB_VFS_SYS_ACL_GET_ENTRY(conn, def_acl, SMB_ACL_FIRST_ENTRY, &entry) == 1)) {
3515 SMB_VFS_SYS_ACL_FREE_ACL(conn, def_acl);
3520 /****************************************************************************
3521 Map from wire type to permset.
3522 ****************************************************************************/
3524 static BOOL unix_ex_wire_to_permset(connection_struct *conn, unsigned char wire_perm, SMB_ACL_PERMSET_T *p_permset)
3526 if (wire_perm & ~(SMB_POSIX_ACL_READ|SMB_POSIX_ACL_WRITE|SMB_POSIX_ACL_EXECUTE)) {
3530 if (SMB_VFS_SYS_ACL_CLEAR_PERMS(conn, *p_permset) == -1) {
3534 if (wire_perm & SMB_POSIX_ACL_READ) {
3535 if (SMB_VFS_SYS_ACL_ADD_PERM(conn, *p_permset, SMB_ACL_READ) == -1) {
3539 if (wire_perm & SMB_POSIX_ACL_WRITE) {
3540 if (SMB_VFS_SYS_ACL_ADD_PERM(conn, *p_permset, SMB_ACL_WRITE) == -1) {
3544 if (wire_perm & SMB_POSIX_ACL_EXECUTE) {
3545 if (SMB_VFS_SYS_ACL_ADD_PERM(conn, *p_permset, SMB_ACL_EXECUTE) == -1) {
3552 /****************************************************************************
3553 Map from wire type to tagtype.
3554 ****************************************************************************/
3556 static BOOL unix_ex_wire_to_tagtype(unsigned char wire_tt, SMB_ACL_TAG_T *p_tt)
3559 case SMB_POSIX_ACL_USER_OBJ:
3560 *p_tt = SMB_ACL_USER_OBJ;
3562 case SMB_POSIX_ACL_USER:
3563 *p_tt = SMB_ACL_USER;
3565 case SMB_POSIX_ACL_GROUP_OBJ:
3566 *p_tt = SMB_ACL_GROUP_OBJ;
3568 case SMB_POSIX_ACL_GROUP:
3569 *p_tt = SMB_ACL_GROUP;
3571 case SMB_POSIX_ACL_MASK:
3572 *p_tt = SMB_ACL_MASK;
3574 case SMB_POSIX_ACL_OTHER:
3575 *p_tt = SMB_ACL_OTHER;
3583 /****************************************************************************
3584 Create a new POSIX acl from wire permissions.
3585 FIXME ! How does the share mask/mode fit into this.... ?
3586 ****************************************************************************/
3588 static SMB_ACL_T create_posix_acl_from_wire(connection_struct *conn, uint16 num_acls, const char *pdata)
3591 SMB_ACL_T the_acl = SMB_VFS_SYS_ACL_INIT(conn, num_acls);
3593 if (the_acl == NULL) {
3597 for (i = 0; i < num_acls; i++) {
3598 SMB_ACL_ENTRY_T the_entry;
3599 SMB_ACL_PERMSET_T the_permset;
3600 SMB_ACL_TAG_T tag_type;
3602 if (SMB_VFS_SYS_ACL_CREATE_ENTRY(conn, &the_acl, &the_entry) == -1) {
3603 DEBUG(0,("create_posix_acl_from_wire: Failed to create entry %u. (%s)\n",
3604 i, strerror(errno) ));
3608 if (!unix_ex_wire_to_tagtype(CVAL(pdata,(i*SMB_POSIX_ACL_ENTRY_SIZE)), &tag_type)) {
3609 DEBUG(0,("create_posix_acl_from_wire: invalid wire tagtype %u on entry %u.\n",
3610 CVAL(pdata,(i*SMB_POSIX_ACL_ENTRY_SIZE)), i ));
3614 if (SMB_VFS_SYS_ACL_SET_TAG_TYPE(conn, the_entry, tag_type) == -1) {
3615 DEBUG(0,("create_posix_acl_from_wire: Failed to set tagtype on entry %u. (%s)\n",
3616 i, strerror(errno) ));
3620 /* Get the permset pointer from the new ACL entry. */
3621 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, the_entry, &the_permset) == -1) {
3622 DEBUG(0,("create_posix_acl_from_wire: Failed to get permset on entry %u. (%s)\n",
3623 i, strerror(errno) ));
3627 /* Map from wire to permissions. */
3628 if (!unix_ex_wire_to_permset(conn, CVAL(pdata,(i*SMB_POSIX_ACL_ENTRY_SIZE)+1), &the_permset)) {
3629 DEBUG(0,("create_posix_acl_from_wire: invalid permset %u on entry %u.\n",
3630 CVAL(pdata,(i*SMB_POSIX_ACL_ENTRY_SIZE) + 1), i ));
3634 /* Now apply to the new ACL entry. */
3635 if (SMB_VFS_SYS_ACL_SET_PERMSET(conn, the_entry, the_permset) == -1) {
3636 DEBUG(0,("create_posix_acl_from_wire: Failed to add permset on entry %u. (%s)\n",
3637 i, strerror(errno) ));
3641 if (tag_type == SMB_ACL_USER) {
3642 uint32 uidval = IVAL(pdata,(i*SMB_POSIX_ACL_ENTRY_SIZE)+2);
3643 uid_t uid = (uid_t)uidval;
3644 if (SMB_VFS_SYS_ACL_SET_QUALIFIER(conn, the_entry,(void *)&uid) == -1) {
3645 DEBUG(0,("create_posix_acl_from_wire: Failed to set uid %u on entry %u. (%s)\n",
3646 (unsigned int)uid, i, strerror(errno) ));
3651 if (tag_type == SMB_ACL_GROUP) {
3652 uint32 gidval = IVAL(pdata,(i*SMB_POSIX_ACL_ENTRY_SIZE)+2);
3653 gid_t gid = (uid_t)gidval;
3654 if (SMB_VFS_SYS_ACL_SET_QUALIFIER(conn, the_entry,(void *)&gid) == -1) {
3655 DEBUG(0,("create_posix_acl_from_wire: Failed to set gid %u on entry %u. (%s)\n",
3656 (unsigned int)gid, i, strerror(errno) ));
3666 if (the_acl != NULL) {
3667 SMB_VFS_SYS_ACL_FREE_ACL(conn, the_acl);
3672 /****************************************************************************
3673 Calls from UNIX extensions - Default POSIX ACL set.
3674 If num_def_acls == 0 and not a directory just return. If it is a directory
3675 and num_def_acls == 0 then remove the default acl. Else set the default acl
3677 ****************************************************************************/
3679 BOOL set_unix_posix_default_acl(connection_struct *conn, const char *fname, SMB_STRUCT_STAT *psbuf,
3680 uint16 num_def_acls, const char *pdata)
3682 SMB_ACL_T def_acl = NULL;
3684 if (num_def_acls && !S_ISDIR(psbuf->st_mode)) {
3685 DEBUG(5,("set_unix_posix_default_acl: Can't set default ACL on non-directory file %s\n", fname ));
3690 if (!num_def_acls) {
3691 /* Remove the default ACL. */
3692 if (SMB_VFS_SYS_ACL_DELETE_DEF_FILE(conn, fname) == -1) {
3693 DEBUG(5,("set_unix_posix_default_acl: acl_delete_def_file failed on directory %s (%s)\n",
3694 fname, strerror(errno) ));
3700 if ((def_acl = create_posix_acl_from_wire(conn, num_def_acls, pdata)) == NULL) {
3704 if (SMB_VFS_SYS_ACL_SET_FILE(conn, fname, SMB_ACL_TYPE_DEFAULT, def_acl) == -1) {
3705 DEBUG(5,("set_unix_posix_default_acl: acl_set_file failed on directory %s (%s)\n",
3706 fname, strerror(errno) ));
3707 SMB_VFS_SYS_ACL_FREE_ACL(conn, def_acl);
3711 DEBUG(10,("set_unix_posix_default_acl: set default acl for file %s\n", fname ));
3712 SMB_VFS_SYS_ACL_FREE_ACL(conn, def_acl);
3716 /****************************************************************************
3717 Remove an ACL from a file. As we don't have acl_delete_entry() available
3718 we must read the current acl and copy all entries except MASK, USER and GROUP
3719 to a new acl, then set that. This (at least on Linux) causes any ACL to be
3721 FIXME ! How does the share mask/mode fit into this.... ?
3722 ****************************************************************************/
3724 static BOOL remove_posix_acl(connection_struct *conn, files_struct *fsp, const char *fname)
3726 SMB_ACL_T file_acl = NULL;
3727 int entry_id = SMB_ACL_FIRST_ENTRY;
3728 SMB_ACL_ENTRY_T entry;
3730 /* Create a new ACL with only 3 entries, u/g/w. */
3731 SMB_ACL_T new_file_acl = SMB_VFS_SYS_ACL_INIT(conn, 3);
3732 SMB_ACL_ENTRY_T user_ent = NULL;
3733 SMB_ACL_ENTRY_T group_ent = NULL;
3734 SMB_ACL_ENTRY_T other_ent = NULL;
3736 if (new_file_acl == NULL) {
3737 DEBUG(5,("remove_posix_acl: failed to init new ACL with 3 entries for file %s.\n", fname));
3741 /* Now create the u/g/w entries. */
3742 if (SMB_VFS_SYS_ACL_CREATE_ENTRY(conn, &new_file_acl, &user_ent) == -1) {
3743 DEBUG(5,("remove_posix_acl: Failed to create user entry for file %s. (%s)\n",
3744 fname, strerror(errno) ));
3747 if (SMB_VFS_SYS_ACL_SET_TAG_TYPE(conn, user_ent, SMB_ACL_USER_OBJ) == -1) {
3748 DEBUG(5,("remove_posix_acl: Failed to set user entry for file %s. (%s)\n",
3749 fname, strerror(errno) ));
3753 if (SMB_VFS_SYS_ACL_CREATE_ENTRY(conn, &new_file_acl, &group_ent) == -1) {
3754 DEBUG(5,("remove_posix_acl: Failed to create group entry for file %s. (%s)\n",
3755 fname, strerror(errno) ));
3758 if (SMB_VFS_SYS_ACL_SET_TAG_TYPE(conn, group_ent, SMB_ACL_GROUP_OBJ) == -1) {
3759 DEBUG(5,("remove_posix_acl: Failed to set group entry for file %s. (%s)\n",
3760 fname, strerror(errno) ));
3764 if (SMB_VFS_SYS_ACL_CREATE_ENTRY(conn, &new_file_acl, &other_ent) == -1) {
3765 DEBUG(5,("remove_posix_acl: Failed to create other entry for file %s. (%s)\n",
3766 fname, strerror(errno) ));
3769 if (SMB_VFS_SYS_ACL_SET_TAG_TYPE(conn, other_ent, SMB_ACL_OTHER) == -1) {
3770 DEBUG(5,("remove_posix_acl: Failed to set other entry for file %s. (%s)\n",
3771 fname, strerror(errno) ));
3775 /* Get the current file ACL. */
3776 if (fsp && fsp->fh->fd != -1) {
3777 file_acl = SMB_VFS_SYS_ACL_GET_FD(fsp, fsp->fh->fd);
3779 file_acl = SMB_VFS_SYS_ACL_GET_FILE( conn, fname, SMB_ACL_TYPE_ACCESS);
3782 if (file_acl == NULL) {
3783 /* This is only returned if an error occurred. Even for a file with
3784 no acl a u/g/w acl should be returned. */
3785 DEBUG(5,("remove_posix_acl: failed to get ACL from file %s (%s).\n",
3786 fname, strerror(errno) ));
3790 while ( SMB_VFS_SYS_ACL_GET_ENTRY(conn, file_acl, entry_id, &entry) == 1) {
3791 SMB_ACL_TAG_T tagtype;
3792 SMB_ACL_PERMSET_T permset;
3795 if (entry_id == SMB_ACL_FIRST_ENTRY)
3796 entry_id = SMB_ACL_NEXT_ENTRY;
3798 if (SMB_VFS_SYS_ACL_GET_TAG_TYPE(conn, entry, &tagtype) == -1) {
3799 DEBUG(5,("remove_posix_acl: failed to get tagtype from ACL on file %s (%s).\n",
3800 fname, strerror(errno) ));
3804 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, entry, &permset) == -1) {
3805 DEBUG(5,("remove_posix_acl: failed to get permset from ACL on file %s (%s).\n",
3806 fname, strerror(errno) ));
3810 if (tagtype == SMB_ACL_USER_OBJ) {
3811 if (SMB_VFS_SYS_ACL_SET_PERMSET(conn, user_ent, permset) == -1) {
3812 DEBUG(5,("remove_posix_acl: failed to set permset from ACL on file %s (%s).\n",
3813 fname, strerror(errno) ));
3815 } else if (tagtype == SMB_ACL_GROUP_OBJ) {
3816 if (SMB_VFS_SYS_ACL_SET_PERMSET(conn, group_ent, permset) == -1) {
3817 DEBUG(5,("remove_posix_acl: failed to set permset from ACL on file %s (%s).\n",
3818 fname, strerror(errno) ));
3820 } else if (tagtype == SMB_ACL_OTHER) {
3821 if (SMB_VFS_SYS_ACL_SET_PERMSET(conn, other_ent, permset) == -1) {
3822 DEBUG(5,("remove_posix_acl: failed to set permset from ACL on file %s (%s).\n",
3823 fname, strerror(errno) ));
3828 /* Set the new empty file ACL. */
3829 if (fsp && fsp->fh->fd != -1) {
3830 if (SMB_VFS_SYS_ACL_SET_FD(fsp, fsp->fh->fd, new_file_acl) == -1) {
3831 DEBUG(5,("remove_posix_acl: acl_set_file failed on %s (%s)\n",
3832 fname, strerror(errno) ));
3836 if (SMB_VFS_SYS_ACL_SET_FILE(conn, fname, SMB_ACL_TYPE_ACCESS, new_file_acl) == -1) {
3837 DEBUG(5,("remove_posix_acl: acl_set_file failed on %s (%s)\n",
3838 fname, strerror(errno) ));
3848 SMB_VFS_SYS_ACL_FREE_ACL(conn, file_acl);
3851 SMB_VFS_SYS_ACL_FREE_ACL(conn, new_file_acl);
3856 /****************************************************************************
3857 Calls from UNIX extensions - POSIX ACL set.
3858 If num_def_acls == 0 then read/modify/write acl after removing all entries
3859 except SMB_ACL_USER_OBJ, SMB_ACL_GROUP_OBJ, SMB_ACL_OTHER.
3860 ****************************************************************************/
3862 BOOL set_unix_posix_acl(connection_struct *conn, files_struct *fsp, const char *fname, uint16 num_acls, const char *pdata)
3864 SMB_ACL_T file_acl = NULL;
3867 /* Remove the ACL from the file. */
3868 return remove_posix_acl(conn, fsp, fname);
3871 if ((file_acl = create_posix_acl_from_wire(conn, num_acls, pdata)) == NULL) {
3875 if (fsp && fsp->fh->fd != -1) {
3876 /* The preferred way - use an open fd. */
3877 if (SMB_VFS_SYS_ACL_SET_FD(fsp, fsp->fh->fd, file_acl) == -1) {
3878 DEBUG(5,("set_unix_posix_acl: acl_set_file failed on %s (%s)\n",
3879 fname, strerror(errno) ));
3880 SMB_VFS_SYS_ACL_FREE_ACL(conn, file_acl);
3884 if (SMB_VFS_SYS_ACL_SET_FILE(conn, fname, SMB_ACL_TYPE_ACCESS, file_acl) == -1) {
3885 DEBUG(5,("set_unix_posix_acl: acl_set_file failed on %s (%s)\n",
3886 fname, strerror(errno) ));
3887 SMB_VFS_SYS_ACL_FREE_ACL(conn, file_acl);
3892 DEBUG(10,("set_unix_posix_acl: set acl for file %s\n", fname ));
3893 SMB_VFS_SYS_ACL_FREE_ACL(conn, file_acl);
3897 /****************************************************************************
3898 Check for POSIX group ACLs. If none use stat entry.
3899 Return -1 if no match, 0 if match and denied, 1 if match and allowed.
3900 ****************************************************************************/
3902 static int check_posix_acl_group_access(connection_struct *conn, const char *fname, SMB_STRUCT_STAT *psbuf, uint32 access_mask)
3904 SMB_ACL_T posix_acl = NULL;
3905 int entry_id = SMB_ACL_FIRST_ENTRY;
3906 SMB_ACL_ENTRY_T entry;
3908 BOOL seen_mask = False;
3909 BOOL seen_owning_group = False;
3913 DEBUG(10,("check_posix_acl_group_access: requesting 0x%x on file %s\n",
3914 (unsigned int)access_mask, fname ));
3916 if ((posix_acl = SMB_VFS_SYS_ACL_GET_FILE(conn, fname, SMB_ACL_TYPE_ACCESS)) == NULL) {
3920 /* First ensure the group mask allows group access. */
3921 /* Also check any user entries (these take preference over group). */
3923 while ( SMB_VFS_SYS_ACL_GET_ENTRY(conn, posix_acl, entry_id, &entry) == 1) {
3924 SMB_ACL_TAG_T tagtype;
3925 SMB_ACL_PERMSET_T permset;
3926 int have_write = -1;
3930 if (entry_id == SMB_ACL_FIRST_ENTRY)
3931 entry_id = SMB_ACL_NEXT_ENTRY;
3933 if (SMB_VFS_SYS_ACL_GET_TAG_TYPE(conn, entry, &tagtype) == -1) {
3937 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, entry, &permset) == -1) {
3941 have_read = SMB_VFS_SYS_ACL_GET_PERM(conn, permset, SMB_ACL_READ);
3942 if (have_read == -1) {
3946 have_write = SMB_VFS_SYS_ACL_GET_PERM(conn, permset, SMB_ACL_WRITE);
3947 if (have_write == -1) {
3952 * Solaris returns 2 for this if write is available.
3953 * canonicalize to 0 or 1.
3955 have_write = (have_write ? 1 : 0);
3956 have_read = (have_read ? 1 : 0);
3961 switch (access_mask) {
3962 case FILE_READ_DATA:
3965 DEBUG(10,("check_posix_acl_group_access: file %s "
3966 "refusing read due to mask.\n", fname));
3970 case FILE_WRITE_DATA:
3973 DEBUG(10,("check_posix_acl_group_access: file %s "
3974 "refusing write due to mask.\n", fname));
3978 default: /* FILE_READ_DATA|FILE_WRITE_DATA */
3979 if (!have_write || !have_read) {
3981 DEBUG(10,("check_posix_acl_group_access: file %s "
3982 "refusing read/write due to mask.\n", fname));
3990 /* Check against current_user.ut.uid. */
3991 uid_t *puid = (uid_t *)SMB_VFS_SYS_ACL_GET_QUALIFIER(conn, entry);
3995 if (current_user.ut.uid == *puid) {
3996 /* We have a uid match but we must ensure we have seen the acl mask. */
3997 switch (access_mask) {
3998 case FILE_READ_DATA:
4001 case FILE_WRITE_DATA:
4004 default: /* FILE_READ_DATA|FILE_WRITE_DATA */
4005 ret = (have_write & have_read);
4008 DEBUG(10,("check_posix_acl_group_access: file %s "
4009 "match on user %u -> %s.\n",
4010 fname, (unsigned int)*puid,
4011 ret ? "can access" : "cannot access"));
4023 /* If ret is anything other than -1 we matched on a user entry. */
4028 /* Next check all group entries. */
4029 entry_id = SMB_ACL_FIRST_ENTRY;
4030 while ( SMB_VFS_SYS_ACL_GET_ENTRY(conn, posix_acl, entry_id, &entry) == 1) {
4031 SMB_ACL_TAG_T tagtype;
4032 SMB_ACL_PERMSET_T permset;
4033 int have_write = -1;
4037 if (entry_id == SMB_ACL_FIRST_ENTRY)
4038 entry_id = SMB_ACL_NEXT_ENTRY;
4040 if (SMB_VFS_SYS_ACL_GET_TAG_TYPE(conn, entry, &tagtype) == -1) {
4044 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, entry, &permset) == -1) {
4048 have_read = SMB_VFS_SYS_ACL_GET_PERM(conn, permset, SMB_ACL_READ);
4049 if (have_read == -1) {
4053 have_write = SMB_VFS_SYS_ACL_GET_PERM(conn, permset, SMB_ACL_WRITE);
4054 if (have_write == -1) {
4059 * Solaris returns 2 for this if write is available.
4060 * canonicalize to 0 or 1.
4062 have_write = (have_write ? 1 : 0);
4063 have_read = (have_read ? 1 : 0);
4067 case SMB_ACL_GROUP_OBJ:
4071 if (tagtype == SMB_ACL_GROUP) {
4072 pgid = (gid_t *)SMB_VFS_SYS_ACL_GET_QUALIFIER(conn, entry);
4074 seen_owning_group = True;
4075 pgid = &psbuf->st_gid;
4082 * Does it match the current effective group
4083 * or supplementary groups ?
4085 for (cu_gid = get_current_user_gid_first(&i); cu_gid != (gid_t)-1;
4086 cu_gid = get_current_user_gid_next(&i)) {
4087 if (cu_gid == *pgid) {
4088 switch (access_mask) {
4089 case FILE_READ_DATA:
4092 case FILE_WRITE_DATA:
4095 default: /* FILE_READ_DATA|FILE_WRITE_DATA */
4096 ret = (have_write & have_read);
4100 DEBUG(10,("check_posix_acl_group_access: file %s "
4101 "match on group %u -> can access.\n",
4102 fname, (unsigned int)cu_gid ));
4104 /* If we don't have access permission this entry doesn't
4105 terminate the enumeration of the entries. */
4109 /* But does terminate the group iteration. */
4120 /* If ret is -1 here we didn't match on the user entry or
4121 supplemental group entries. */
4123 DEBUG(10,("check_posix_acl_group_access: ret = %d before check_stat:\n", ret));
4128 * We only check the S_I[RW]GRP permissions if we haven't already
4129 * seen an owning group SMB_ACL_GROUP_OBJ ace entry. If there is an
4130 * SMB_ACL_GROUP_OBJ ace entry then the group bits in st_gid are
4131 * the same as the SMB_ACL_MASK bits, not the SMB_ACL_GROUP_OBJ
4132 * bits. Thanks to Marc Cousin <mcousin@sigma.fr> for pointing
4136 if (!seen_owning_group) {
4137 /* Do we match on the owning group entry ? */
4139 * Does it match the current effective group
4140 * or supplementary groups ?
4142 for (cu_gid = get_current_user_gid_first(&i); cu_gid != (gid_t)-1;
4143 cu_gid = get_current_user_gid_next(&i)) {
4144 if (cu_gid == psbuf->st_gid) {
4145 switch (access_mask) {
4146 case FILE_READ_DATA:
4147 ret = (psbuf->st_mode & S_IRGRP) ? 1 : 0;
4149 case FILE_WRITE_DATA:
4150 ret = (psbuf->st_mode & S_IWGRP) ? 1 : 0;
4152 default: /* FILE_READ_DATA|FILE_WRITE_DATA */
4153 if ((psbuf->st_mode & (S_IWGRP|S_IRGRP)) == (S_IWGRP|S_IRGRP)) {
4160 DEBUG(10,("check_posix_acl_group_access: file %s "
4161 "match on owning group %u -> %s.\n",
4162 fname, (unsigned int)psbuf->st_gid,
4163 ret ? "can access" : "cannot access"));
4168 if (cu_gid == (gid_t)-1) {
4169 DEBUG(10,("check_posix_acl_group_access: file %s "
4170 "failed to match on user or group in token (ret = %d).\n",
4178 SMB_VFS_SYS_ACL_FREE_ACL(conn, posix_acl);
4181 DEBUG(10,("check_posix_acl_group_access: file %s returning (ret = %d).\n", fname, ret ));
4185 /****************************************************************************
4186 Actually emulate the in-kernel access checking for delete access. We need
4187 this to successfully return ACCESS_DENIED on a file open for delete access.
4188 ****************************************************************************/
4190 BOOL can_delete_file_in_directory(connection_struct *conn, const char *fname)
4192 SMB_STRUCT_STAT sbuf;
4196 if (!CAN_WRITE(conn)) {
4200 /* Get the parent directory permission mask and owners. */
4201 pstrcpy(dname, parent_dirname(fname));
4202 if(SMB_VFS_STAT(conn, dname, &sbuf) != 0) {
4205 if (!S_ISDIR(sbuf.st_mode)) {
4208 if (current_user.ut.uid == 0 || conn->admin_user) {
4209 /* I'm sorry sir, I didn't know you were root... */
4213 /* Check primary owner write access. */
4214 if (current_user.ut.uid == sbuf.st_uid) {
4215 return (sbuf.st_mode & S_IWUSR) ? True : False;
4219 /* sticky bit means delete only by owner or root. */
4220 if (sbuf.st_mode & S_ISVTX) {
4221 SMB_STRUCT_STAT sbuf_file;
4222 if(SMB_VFS_STAT(conn, fname, &sbuf_file) != 0) {
4226 * Patch from SATOH Fumiyasu <fumiyas@miraclelinux.com>
4227 * for bug #3348. Don't assume owning sticky bit
4228 * directory means write access allowed.
4230 if (current_user.ut.uid != sbuf_file.st_uid) {
4236 /* Check group or explicit user acl entry write access. */
4237 ret = check_posix_acl_group_access(conn, dname, &sbuf, FILE_WRITE_DATA);
4238 if (ret == 0 || ret == 1) {
4239 return ret ? True : False;
4242 /* Finally check other write access. */
4243 return (sbuf.st_mode & S_IWOTH) ? True : False;
4246 /****************************************************************************
4247 Actually emulate the in-kernel access checking for read/write access. We need
4248 this to successfully check for ability to write for dos filetimes.
4249 Note this doesn't take into account share write permissions.
4250 ****************************************************************************/
4252 BOOL can_access_file(connection_struct *conn, const char *fname, SMB_STRUCT_STAT *psbuf, uint32 access_mask)
4256 if (!(access_mask & (FILE_READ_DATA|FILE_WRITE_DATA))) {
4259 access_mask &= (FILE_READ_DATA|FILE_WRITE_DATA);
4261 DEBUG(10,("can_access_file: requesting 0x%x on file %s\n",
4262 (unsigned int)access_mask, fname ));
4264 if (current_user.ut.uid == 0 || conn->admin_user) {
4265 /* I'm sorry sir, I didn't know you were root... */
4269 if (!VALID_STAT(*psbuf)) {
4270 /* Get the file permission mask and owners. */
4271 if(SMB_VFS_STAT(conn, fname, psbuf) != 0) {
4276 /* Check primary owner access. */
4277 if (current_user.ut.uid == psbuf->st_uid) {
4278 switch (access_mask) {
4279 case FILE_READ_DATA:
4280 return (psbuf->st_mode & S_IRUSR) ? True : False;
4282 case FILE_WRITE_DATA:
4283 return (psbuf->st_mode & S_IWUSR) ? True : False;
4285 default: /* FILE_READ_DATA|FILE_WRITE_DATA */
4287 if ((psbuf->st_mode & (S_IWUSR|S_IRUSR)) == (S_IWUSR|S_IRUSR)) {
4295 /* Check group or explicit user acl entry access. */
4296 ret = check_posix_acl_group_access(conn, fname, psbuf, access_mask);
4297 if (ret == 0 || ret == 1) {
4298 return ret ? True : False;
4301 /* Finally check other access. */
4302 switch (access_mask) {
4303 case FILE_READ_DATA:
4304 return (psbuf->st_mode & S_IROTH) ? True : False;
4306 case FILE_WRITE_DATA:
4307 return (psbuf->st_mode & S_IWOTH) ? True : False;
4309 default: /* FILE_READ_DATA|FILE_WRITE_DATA */
4311 if ((psbuf->st_mode & (S_IWOTH|S_IROTH)) == (S_IWOTH|S_IROTH)) {
4318 /****************************************************************************
4319 Userspace check for write access.
4320 Note this doesn't take into account share write permissions.
4321 ****************************************************************************/
4323 BOOL can_write_to_file(connection_struct *conn, const char *fname, SMB_STRUCT_STAT *psbuf)
4325 return can_access_file(conn, fname, psbuf, FILE_WRITE_DATA);
4328 /********************************************************************
4329 Pull the NT ACL from a file on disk or the OpenEventlog() access
4330 check. Caller is responsible for freeing the returned security
4331 descriptor via TALLOC_FREE(). This is designed for dealing with
4332 user space access checks in smbd outside of the VFS. For example,
4333 checking access rights in OpenEventlog().
4335 Assume we are dealing with files (for now)
4336 ********************************************************************/
4338 SEC_DESC* get_nt_acl_no_snum( TALLOC_CTX *ctx, const char *fname)
4340 SEC_DESC *psd, *ret_sd;
4341 connection_struct conn;
4343 struct fd_handle fh;
4347 ZERO_STRUCT( conn );
4349 if ( !(conn.mem_ctx = talloc_init( "novfs_get_nt_acl" )) ) {
4350 DEBUG(0,("get_nt_acl_no_snum: talloc() failed!\n"));
4354 if (!(conn.params = TALLOC_P(conn.mem_ctx, struct share_params))) {
4355 DEBUG(0,("get_nt_acl_no_snum: talloc() failed!\n"));
4356 TALLOC_FREE(conn.mem_ctx);
4360 conn.params->service = -1;
4362 pstrcpy( path, "/" );
4363 set_conn_connectpath(&conn, path);
4365 if (!smbd_vfs_init(&conn)) {
4366 DEBUG(0,("get_nt_acl_no_snum: Unable to create a fake connection struct!\n"));
4367 conn_free_internal( &conn );
4371 ZERO_STRUCT( finfo );
4378 pstrcpy( filename, fname );
4379 finfo.fsp_name = filename;
4381 if (get_nt_acl( &finfo, DACL_SECURITY_INFORMATION, &psd ) == 0) {
4382 DEBUG(0,("get_nt_acl_no_snum: get_nt_acl returned zero.\n"));
4383 conn_free_internal( &conn );
4387 ret_sd = dup_sec_desc( ctx, psd );
4389 conn_free_internal( &conn );