2 Unix SMB/CIFS implementation.
3 SMB NT Security Descriptor / Unix permission conversion.
4 Copyright (C) Jeremy Allison 1994-2000.
5 Copyright (C) Andreas Gruenbacher 2002.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>.
23 extern struct current_user current_user;
24 extern struct generic_mapping file_generic_mapping;
27 #define DBGC_CLASS DBGC_ACLS
29 /****************************************************************************
30 Data structures representing the internal ACE format.
31 ****************************************************************************/
33 enum ace_owner {UID_ACE, GID_ACE, WORLD_ACE};
34 enum ace_attribute {ALLOW_ACE, DENY_ACE}; /* Used for incoming NT ACLS. */
36 typedef union posix_id {
42 typedef struct canon_ace {
43 struct canon_ace *next, *prev;
45 mode_t perms; /* Only use S_I(R|W|X)USR mode bits here. */
47 enum ace_owner owner_type;
48 enum ace_attribute attr;
53 #define ALL_ACE_PERMS (S_IRUSR|S_IWUSR|S_IXUSR)
56 * EA format of user.SAMBA_PAI (Samba_Posix_Acl_Interitance)
59 * | 1 | 1 | 2 | 2 | ....
60 * +------+------+-------------+---------------------+-------------+--------------------+
61 * | vers | flag | num_entries | num_default_entries | ..entries.. | default_entries... |
62 * +------+------+-------------+---------------------+-------------+--------------------+
65 #define PAI_VERSION_OFFSET 0
66 #define PAI_FLAG_OFFSET 1
67 #define PAI_NUM_ENTRIES_OFFSET 2
68 #define PAI_NUM_DEFAULT_ENTRIES_OFFSET 4
69 #define PAI_ENTRIES_BASE 6
72 #define PAI_ACL_FLAG_PROTECTED 0x1
73 #define PAI_ENTRY_LENGTH 5
76 * In memory format of user.SAMBA_PAI attribute.
80 struct pai_entry *next, *prev;
81 enum ace_owner owner_type;
87 unsigned int num_entries;
88 struct pai_entry *entry_list;
89 unsigned int num_def_entries;
90 struct pai_entry *def_entry_list;
93 /************************************************************************
94 Return a uint32 of the pai_entry principal.
95 ************************************************************************/
97 static uint32 get_pai_entry_val(struct pai_entry *paie)
99 switch (paie->owner_type) {
101 DEBUG(10,("get_pai_entry_val: uid = %u\n", (unsigned int)paie->unix_ug.uid ));
102 return (uint32)paie->unix_ug.uid;
104 DEBUG(10,("get_pai_entry_val: gid = %u\n", (unsigned int)paie->unix_ug.gid ));
105 return (uint32)paie->unix_ug.gid;
108 DEBUG(10,("get_pai_entry_val: world ace\n"));
113 /************************************************************************
114 Return a uint32 of the entry principal.
115 ************************************************************************/
117 static uint32 get_entry_val(canon_ace *ace_entry)
119 switch (ace_entry->owner_type) {
121 DEBUG(10,("get_entry_val: uid = %u\n", (unsigned int)ace_entry->unix_ug.uid ));
122 return (uint32)ace_entry->unix_ug.uid;
124 DEBUG(10,("get_entry_val: gid = %u\n", (unsigned int)ace_entry->unix_ug.gid ));
125 return (uint32)ace_entry->unix_ug.gid;
128 DEBUG(10,("get_entry_val: world ace\n"));
133 /************************************************************************
134 Count the inherited entries.
135 ************************************************************************/
137 static unsigned int num_inherited_entries(canon_ace *ace_list)
139 unsigned int num_entries = 0;
141 for (; ace_list; ace_list = ace_list->next)
142 if (ace_list->inherited)
147 /************************************************************************
148 Create the on-disk format. Caller must free.
149 ************************************************************************/
151 static char *create_pai_buf(canon_ace *file_ace_list, canon_ace *dir_ace_list, BOOL pai_protected, size_t *store_size)
153 char *pai_buf = NULL;
154 canon_ace *ace_list = NULL;
155 char *entry_offset = NULL;
156 unsigned int num_entries = 0;
157 unsigned int num_def_entries = 0;
159 for (ace_list = file_ace_list; ace_list; ace_list = ace_list->next)
160 if (ace_list->inherited)
163 for (ace_list = dir_ace_list; ace_list; ace_list = ace_list->next)
164 if (ace_list->inherited)
167 DEBUG(10,("create_pai_buf: num_entries = %u, num_def_entries = %u\n", num_entries, num_def_entries ));
169 *store_size = PAI_ENTRIES_BASE + ((num_entries + num_def_entries)*PAI_ENTRY_LENGTH);
171 pai_buf = (char *)SMB_MALLOC(*store_size);
176 /* Set up the header. */
177 memset(pai_buf, '\0', PAI_ENTRIES_BASE);
178 SCVAL(pai_buf,PAI_VERSION_OFFSET,PAI_VERSION);
179 SCVAL(pai_buf,PAI_FLAG_OFFSET,(pai_protected ? PAI_ACL_FLAG_PROTECTED : 0));
180 SSVAL(pai_buf,PAI_NUM_ENTRIES_OFFSET,num_entries);
181 SSVAL(pai_buf,PAI_NUM_DEFAULT_ENTRIES_OFFSET,num_def_entries);
183 entry_offset = pai_buf + PAI_ENTRIES_BASE;
185 for (ace_list = file_ace_list; ace_list; ace_list = ace_list->next) {
186 if (ace_list->inherited) {
187 uint8 type_val = (unsigned char)ace_list->owner_type;
188 uint32 entry_val = get_entry_val(ace_list);
190 SCVAL(entry_offset,0,type_val);
191 SIVAL(entry_offset,1,entry_val);
192 entry_offset += PAI_ENTRY_LENGTH;
196 for (ace_list = dir_ace_list; ace_list; ace_list = ace_list->next) {
197 if (ace_list->inherited) {
198 uint8 type_val = (unsigned char)ace_list->owner_type;
199 uint32 entry_val = get_entry_val(ace_list);
201 SCVAL(entry_offset,0,type_val);
202 SIVAL(entry_offset,1,entry_val);
203 entry_offset += PAI_ENTRY_LENGTH;
210 /************************************************************************
211 Store the user.SAMBA_PAI attribute on disk.
212 ************************************************************************/
214 static void store_inheritance_attributes(files_struct *fsp, canon_ace *file_ace_list,
215 canon_ace *dir_ace_list, BOOL pai_protected)
221 if (!lp_map_acl_inherit(SNUM(fsp->conn)))
225 * Don't store if this ACL isn't protected and
226 * none of the entries in it are marked as inherited.
229 if (!pai_protected && num_inherited_entries(file_ace_list) == 0 && num_inherited_entries(dir_ace_list) == 0) {
230 /* Instead just remove the attribute if it exists. */
231 if (fsp->fh->fd != -1)
232 SMB_VFS_FREMOVEXATTR(fsp, fsp->fh->fd, SAMBA_POSIX_INHERITANCE_EA_NAME);
234 SMB_VFS_REMOVEXATTR(fsp->conn, fsp->fsp_name, SAMBA_POSIX_INHERITANCE_EA_NAME);
238 pai_buf = create_pai_buf(file_ace_list, dir_ace_list, pai_protected, &store_size);
240 if (fsp->fh->fd != -1)
241 ret = SMB_VFS_FSETXATTR(fsp, fsp->fh->fd, SAMBA_POSIX_INHERITANCE_EA_NAME,
242 pai_buf, store_size, 0);
244 ret = SMB_VFS_SETXATTR(fsp->conn,fsp->fsp_name, SAMBA_POSIX_INHERITANCE_EA_NAME,
245 pai_buf, store_size, 0);
249 DEBUG(10,("store_inheritance_attribute:%s for file %s\n", pai_protected ? " (protected)" : "", fsp->fsp_name));
250 if (ret == -1 && !no_acl_syscall_error(errno))
251 DEBUG(1,("store_inheritance_attribute: Error %s\n", strerror(errno) ));
254 /************************************************************************
255 Delete the in memory inheritance info.
256 ************************************************************************/
258 static void free_inherited_info(struct pai_val *pal)
261 struct pai_entry *paie, *paie_next;
262 for (paie = pal->entry_list; paie; paie = paie_next) {
263 paie_next = paie->next;
266 for (paie = pal->def_entry_list; paie; paie = paie_next) {
267 paie_next = paie->next;
274 /************************************************************************
275 Was this ACL protected ?
276 ************************************************************************/
278 static BOOL get_protected_flag(struct pai_val *pal)
282 return pal->pai_protected;
285 /************************************************************************
286 Was this ACE inherited ?
287 ************************************************************************/
289 static BOOL get_inherited_flag(struct pai_val *pal, canon_ace *ace_entry, BOOL default_ace)
291 struct pai_entry *paie;
296 /* If the entry exists it is inherited. */
297 for (paie = (default_ace ? pal->def_entry_list : pal->entry_list); paie; paie = paie->next) {
298 if (ace_entry->owner_type == paie->owner_type &&
299 get_entry_val(ace_entry) == get_pai_entry_val(paie))
305 /************************************************************************
306 Ensure an attribute just read is valid.
307 ************************************************************************/
309 static BOOL check_pai_ok(char *pai_buf, size_t pai_buf_data_size)
312 uint16 num_def_entries;
314 if (pai_buf_data_size < PAI_ENTRIES_BASE) {
315 /* Corrupted - too small. */
319 if (CVAL(pai_buf,PAI_VERSION_OFFSET) != PAI_VERSION)
322 num_entries = SVAL(pai_buf,PAI_NUM_ENTRIES_OFFSET);
323 num_def_entries = SVAL(pai_buf,PAI_NUM_DEFAULT_ENTRIES_OFFSET);
325 /* Check the entry lists match. */
326 /* Each entry is 5 bytes (type plus 4 bytes of uid or gid). */
328 if (((num_entries + num_def_entries)*PAI_ENTRY_LENGTH) + PAI_ENTRIES_BASE != pai_buf_data_size)
335 /************************************************************************
336 Convert to in-memory format.
337 ************************************************************************/
339 static struct pai_val *create_pai_val(char *buf, size_t size)
342 struct pai_val *paiv = NULL;
345 if (!check_pai_ok(buf, size))
348 paiv = SMB_MALLOC_P(struct pai_val);
352 memset(paiv, '\0', sizeof(struct pai_val));
354 paiv->pai_protected = (CVAL(buf,PAI_FLAG_OFFSET) == PAI_ACL_FLAG_PROTECTED);
356 paiv->num_entries = SVAL(buf,PAI_NUM_ENTRIES_OFFSET);
357 paiv->num_def_entries = SVAL(buf,PAI_NUM_DEFAULT_ENTRIES_OFFSET);
359 entry_offset = buf + PAI_ENTRIES_BASE;
361 DEBUG(10,("create_pai_val:%s num_entries = %u, num_def_entries = %u\n",
362 paiv->pai_protected ? " (pai_protected)" : "", paiv->num_entries, paiv->num_def_entries ));
364 for (i = 0; i < paiv->num_entries; i++) {
365 struct pai_entry *paie;
367 paie = SMB_MALLOC_P(struct pai_entry);
369 free_inherited_info(paiv);
373 paie->owner_type = (enum ace_owner)CVAL(entry_offset,0);
374 switch( paie->owner_type) {
376 paie->unix_ug.uid = (uid_t)IVAL(entry_offset,1);
377 DEBUG(10,("create_pai_val: uid = %u\n", (unsigned int)paie->unix_ug.uid ));
380 paie->unix_ug.gid = (gid_t)IVAL(entry_offset,1);
381 DEBUG(10,("create_pai_val: gid = %u\n", (unsigned int)paie->unix_ug.gid ));
384 paie->unix_ug.world = -1;
385 DEBUG(10,("create_pai_val: world ace\n"));
388 free_inherited_info(paiv);
391 entry_offset += PAI_ENTRY_LENGTH;
392 DLIST_ADD(paiv->entry_list, paie);
395 for (i = 0; i < paiv->num_def_entries; i++) {
396 struct pai_entry *paie;
398 paie = SMB_MALLOC_P(struct pai_entry);
400 free_inherited_info(paiv);
404 paie->owner_type = (enum ace_owner)CVAL(entry_offset,0);
405 switch( paie->owner_type) {
407 paie->unix_ug.uid = (uid_t)IVAL(entry_offset,1);
408 DEBUG(10,("create_pai_val: (def) uid = %u\n", (unsigned int)paie->unix_ug.uid ));
411 paie->unix_ug.gid = (gid_t)IVAL(entry_offset,1);
412 DEBUG(10,("create_pai_val: (def) gid = %u\n", (unsigned int)paie->unix_ug.gid ));
415 paie->unix_ug.world = -1;
416 DEBUG(10,("create_pai_val: (def) world ace\n"));
419 free_inherited_info(paiv);
422 entry_offset += PAI_ENTRY_LENGTH;
423 DLIST_ADD(paiv->def_entry_list, paie);
429 /************************************************************************
430 Load the user.SAMBA_PAI attribute.
431 ************************************************************************/
433 static struct pai_val *load_inherited_info(files_struct *fsp)
436 size_t pai_buf_size = 1024;
437 struct pai_val *paiv = NULL;
440 if (!lp_map_acl_inherit(SNUM(fsp->conn)))
443 if ((pai_buf = (char *)SMB_MALLOC(pai_buf_size)) == NULL)
447 if (fsp->fh->fd != -1)
448 ret = SMB_VFS_FGETXATTR(fsp, fsp->fh->fd, SAMBA_POSIX_INHERITANCE_EA_NAME,
449 pai_buf, pai_buf_size);
451 ret = SMB_VFS_GETXATTR(fsp->conn,fsp->fsp_name,SAMBA_POSIX_INHERITANCE_EA_NAME,
452 pai_buf, pai_buf_size);
455 if (errno != ERANGE) {
458 /* Buffer too small - enlarge it. */
461 if (pai_buf_size > 1024*1024) {
462 return NULL; /* Limit malloc to 1mb. */
464 if ((pai_buf = (char *)SMB_MALLOC(pai_buf_size)) == NULL)
469 DEBUG(10,("load_inherited_info: ret = %lu for file %s\n", (unsigned long)ret, fsp->fsp_name));
472 /* No attribute or not supported. */
474 if (errno != ENOATTR)
475 DEBUG(10,("load_inherited_info: Error %s\n", strerror(errno) ));
478 DEBUG(10,("load_inherited_info: Error %s\n", strerror(errno) ));
484 paiv = create_pai_val(pai_buf, ret);
486 if (paiv && paiv->pai_protected)
487 DEBUG(10,("load_inherited_info: ACL is protected for file %s\n", fsp->fsp_name));
493 /****************************************************************************
494 Functions to manipulate the internal ACE format.
495 ****************************************************************************/
497 /****************************************************************************
498 Count a linked list of canonical ACE entries.
499 ****************************************************************************/
501 static size_t count_canon_ace_list( canon_ace *list_head )
506 for (ace = list_head; ace; ace = ace->next)
512 /****************************************************************************
513 Free a linked list of canonical ACE entries.
514 ****************************************************************************/
516 static void free_canon_ace_list( canon_ace *list_head )
518 canon_ace *list, *next;
520 for (list = list_head; list; list = next) {
522 DLIST_REMOVE(list_head, list);
527 /****************************************************************************
528 Function to duplicate a canon_ace entry.
529 ****************************************************************************/
531 static canon_ace *dup_canon_ace( canon_ace *src_ace)
533 canon_ace *dst_ace = SMB_MALLOC_P(canon_ace);
539 dst_ace->prev = dst_ace->next = NULL;
543 /****************************************************************************
544 Print out a canon ace.
545 ****************************************************************************/
547 static void print_canon_ace(canon_ace *pace, int num)
551 dbgtext( "canon_ace index %d. Type = %s ", num, pace->attr == ALLOW_ACE ? "allow" : "deny" );
552 dbgtext( "SID = %s ", sid_to_string( str, &pace->trustee));
553 if (pace->owner_type == UID_ACE) {
554 const char *u_name = uidtoname(pace->unix_ug.uid);
555 dbgtext( "uid %u (%s) ", (unsigned int)pace->unix_ug.uid, u_name );
556 } else if (pace->owner_type == GID_ACE) {
557 char *g_name = gidtoname(pace->unix_ug.gid);
558 dbgtext( "gid %u (%s) ", (unsigned int)pace->unix_ug.gid, g_name );
561 switch (pace->type) {
563 dbgtext( "SMB_ACL_USER ");
565 case SMB_ACL_USER_OBJ:
566 dbgtext( "SMB_ACL_USER_OBJ ");
569 dbgtext( "SMB_ACL_GROUP ");
571 case SMB_ACL_GROUP_OBJ:
572 dbgtext( "SMB_ACL_GROUP_OBJ ");
575 dbgtext( "SMB_ACL_OTHER ");
582 dbgtext( "(inherited) ");
584 dbgtext( "%c", pace->perms & S_IRUSR ? 'r' : '-');
585 dbgtext( "%c", pace->perms & S_IWUSR ? 'w' : '-');
586 dbgtext( "%c\n", pace->perms & S_IXUSR ? 'x' : '-');
589 /****************************************************************************
590 Print out a canon ace list.
591 ****************************************************************************/
593 static void print_canon_ace_list(const char *name, canon_ace *ace_list)
597 if( DEBUGLVL( 10 )) {
598 dbgtext( "print_canon_ace_list: %s\n", name );
599 for (;ace_list; ace_list = ace_list->next, count++)
600 print_canon_ace(ace_list, count );
604 /****************************************************************************
605 Map POSIX ACL perms to canon_ace permissions (a mode_t containing only S_(R|W|X)USR bits).
606 ****************************************************************************/
608 static mode_t convert_permset_to_mode_t(connection_struct *conn, SMB_ACL_PERMSET_T permset)
612 ret |= (SMB_VFS_SYS_ACL_GET_PERM(conn, permset, SMB_ACL_READ) ? S_IRUSR : 0);
613 ret |= (SMB_VFS_SYS_ACL_GET_PERM(conn, permset, SMB_ACL_WRITE) ? S_IWUSR : 0);
614 ret |= (SMB_VFS_SYS_ACL_GET_PERM(conn, permset, SMB_ACL_EXECUTE) ? S_IXUSR : 0);
619 /****************************************************************************
620 Map generic UNIX permissions to canon_ace permissions (a mode_t containing only S_(R|W|X)USR bits).
621 ****************************************************************************/
623 static mode_t unix_perms_to_acl_perms(mode_t mode, int r_mask, int w_mask, int x_mask)
637 /****************************************************************************
638 Map canon_ace permissions (a mode_t containing only S_(R|W|X)USR bits) to
639 an SMB_ACL_PERMSET_T.
640 ****************************************************************************/
642 static int map_acl_perms_to_permset(connection_struct *conn, mode_t mode, SMB_ACL_PERMSET_T *p_permset)
644 if (SMB_VFS_SYS_ACL_CLEAR_PERMS(conn, *p_permset) == -1)
646 if (mode & S_IRUSR) {
647 if (SMB_VFS_SYS_ACL_ADD_PERM(conn, *p_permset, SMB_ACL_READ) == -1)
650 if (mode & S_IWUSR) {
651 if (SMB_VFS_SYS_ACL_ADD_PERM(conn, *p_permset, SMB_ACL_WRITE) == -1)
654 if (mode & S_IXUSR) {
655 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 Is the identity in two ACEs equal ? Check both SID and uid/gid.
673 ****************************************************************************/
675 static BOOL identity_in_ace_equal(canon_ace *ace1, canon_ace *ace2)
677 if (sid_equal(&ace1->trustee, &ace2->trustee)) {
680 if (ace1->owner_type == ace2->owner_type) {
681 if (ace1->owner_type == UID_ACE &&
682 ace1->unix_ug.uid == ace2->unix_ug.uid) {
684 } else if (ace1->owner_type == GID_ACE &&
685 ace1->unix_ug.gid == ace2->unix_ug.gid) {
692 /****************************************************************************
693 Merge aces with a common sid - if both are allow or deny, OR the permissions together and
694 delete the second one. If the first is deny, mask the permissions off and delete the allow
695 if the permissions become zero, delete the deny if the permissions are non zero.
696 ****************************************************************************/
698 static void merge_aces( canon_ace **pp_list_head )
700 canon_ace *list_head = *pp_list_head;
701 canon_ace *curr_ace_outer;
702 canon_ace *curr_ace_outer_next;
705 * First, merge allow entries with identical SIDs, and deny entries
706 * with identical SIDs.
709 for (curr_ace_outer = list_head; curr_ace_outer; curr_ace_outer = curr_ace_outer_next) {
711 canon_ace *curr_ace_next;
713 curr_ace_outer_next = curr_ace_outer->next; /* Save the link in case we delete. */
715 for (curr_ace = curr_ace_outer->next; curr_ace; curr_ace = curr_ace_next) {
717 curr_ace_next = curr_ace->next; /* Save the link in case of delete. */
719 if (identity_in_ace_equal(curr_ace, curr_ace_outer) &&
720 (curr_ace->attr == curr_ace_outer->attr)) {
722 if( DEBUGLVL( 10 )) {
723 dbgtext("merge_aces: Merging ACE's\n");
724 print_canon_ace( curr_ace_outer, 0);
725 print_canon_ace( curr_ace, 0);
728 /* Merge two allow or two deny ACE's. */
730 curr_ace_outer->perms |= curr_ace->perms;
731 DLIST_REMOVE(list_head, curr_ace);
733 curr_ace_outer_next = curr_ace_outer->next; /* We may have deleted the link. */
739 * Now go through and mask off allow permissions with deny permissions.
740 * We can delete either the allow or deny here as we know that each SID
741 * appears only once in the list.
744 for (curr_ace_outer = list_head; curr_ace_outer; curr_ace_outer = curr_ace_outer_next) {
746 canon_ace *curr_ace_next;
748 curr_ace_outer_next = curr_ace_outer->next; /* Save the link in case we delete. */
750 for (curr_ace = curr_ace_outer->next; curr_ace; curr_ace = curr_ace_next) {
752 curr_ace_next = curr_ace->next; /* Save the link in case of delete. */
755 * Subtract ACE's with different entries. Due to the ordering constraints
756 * we've put on the ACL, we know the deny must be the first one.
759 if (identity_in_ace_equal(curr_ace, curr_ace_outer) &&
760 (curr_ace_outer->attr == DENY_ACE) && (curr_ace->attr == ALLOW_ACE)) {
762 if( DEBUGLVL( 10 )) {
763 dbgtext("merge_aces: Masking ACE's\n");
764 print_canon_ace( curr_ace_outer, 0);
765 print_canon_ace( curr_ace, 0);
768 curr_ace->perms &= ~curr_ace_outer->perms;
770 if (curr_ace->perms == 0) {
773 * The deny overrides the allow. Remove the allow.
776 DLIST_REMOVE(list_head, curr_ace);
778 curr_ace_outer_next = curr_ace_outer->next; /* We may have deleted the link. */
783 * Even after removing permissions, there
784 * are still allow permissions - delete the deny.
785 * It is safe to delete the deny here,
786 * as we are guarenteed by the deny first
787 * ordering that all the deny entries for
788 * this SID have already been merged into one
789 * before we can get to an allow ace.
792 DLIST_REMOVE(list_head, curr_ace_outer);
793 SAFE_FREE(curr_ace_outer);
798 } /* end for curr_ace */
799 } /* end for curr_ace_outer */
801 /* We may have modified the list. */
803 *pp_list_head = list_head;
806 /****************************************************************************
807 Check if we need to return NT4.x compatible ACL entries.
808 ****************************************************************************/
810 static BOOL nt4_compatible_acls(void)
812 int compat = lp_acl_compatibility();
814 if (compat == ACL_COMPAT_AUTO) {
815 enum remote_arch_types ra_type = get_remote_arch();
817 /* Automatically adapt to client */
818 return (ra_type <= RA_WINNT);
820 return (compat == ACL_COMPAT_WINNT);
824 /****************************************************************************
825 Map canon_ace perms to permission bits NT.
826 The attr element is not used here - we only process deny entries on set,
827 not get. Deny entries are implicit on get with ace->perms = 0.
828 ****************************************************************************/
830 static SEC_ACCESS map_canon_ace_perms(int snum,
838 *pacl_type = SEC_ACE_TYPE_ACCESS_ALLOWED;
840 if (lp_acl_map_full_control(snum) && ((perms & ALL_ACE_PERMS) == ALL_ACE_PERMS)) {
842 nt_mask = UNIX_DIRECTORY_ACCESS_RWX;
844 nt_mask = UNIX_ACCESS_RWX;
846 } else if ((perms & ALL_ACE_PERMS) == (mode_t)0) {
848 * Windows NT refuses to display ACEs with no permissions in them (but
849 * they are perfectly legal with Windows 2000). If the ACE has empty
850 * permissions we cannot use 0, so we use the otherwise unused
851 * WRITE_OWNER permission, which we ignore when we set an ACL.
852 * We abstract this into a #define of UNIX_ACCESS_NONE to allow this
853 * to be changed in the future.
856 if (nt4_compatible_acls())
857 nt_mask = UNIX_ACCESS_NONE;
862 nt_mask |= ((perms & S_IRUSR) ? UNIX_DIRECTORY_ACCESS_R : 0 );
863 nt_mask |= ((perms & S_IWUSR) ? UNIX_DIRECTORY_ACCESS_W : 0 );
864 nt_mask |= ((perms & S_IXUSR) ? UNIX_DIRECTORY_ACCESS_X : 0 );
866 nt_mask |= ((perms & S_IRUSR) ? UNIX_ACCESS_R : 0 );
867 nt_mask |= ((perms & S_IWUSR) ? UNIX_ACCESS_W : 0 );
868 nt_mask |= ((perms & S_IXUSR) ? UNIX_ACCESS_X : 0 );
872 DEBUG(10,("map_canon_ace_perms: Mapped (UNIX) %x to (NT) %x\n",
873 (unsigned int)perms, (unsigned int)nt_mask ));
875 init_sec_access(&sa,nt_mask);
879 /****************************************************************************
880 Map NT perms to a UNIX mode_t.
881 ****************************************************************************/
883 #define FILE_SPECIFIC_READ_BITS (FILE_READ_DATA|FILE_READ_EA|FILE_READ_ATTRIBUTES)
884 #define FILE_SPECIFIC_WRITE_BITS (FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_WRITE_EA|FILE_WRITE_ATTRIBUTES)
885 #define FILE_SPECIFIC_EXECUTE_BITS (FILE_EXECUTE)
887 static mode_t map_nt_perms( uint32 *mask, int type)
893 if((*mask) & GENERIC_ALL_ACCESS)
894 mode = S_IRUSR|S_IWUSR|S_IXUSR;
896 mode |= ((*mask) & (GENERIC_READ_ACCESS|FILE_SPECIFIC_READ_BITS)) ? S_IRUSR : 0;
897 mode |= ((*mask) & (GENERIC_WRITE_ACCESS|FILE_SPECIFIC_WRITE_BITS)) ? S_IWUSR : 0;
898 mode |= ((*mask) & (GENERIC_EXECUTE_ACCESS|FILE_SPECIFIC_EXECUTE_BITS)) ? S_IXUSR : 0;
902 if((*mask) & GENERIC_ALL_ACCESS)
903 mode = S_IRGRP|S_IWGRP|S_IXGRP;
905 mode |= ((*mask) & (GENERIC_READ_ACCESS|FILE_SPECIFIC_READ_BITS)) ? S_IRGRP : 0;
906 mode |= ((*mask) & (GENERIC_WRITE_ACCESS|FILE_SPECIFIC_WRITE_BITS)) ? S_IWGRP : 0;
907 mode |= ((*mask) & (GENERIC_EXECUTE_ACCESS|FILE_SPECIFIC_EXECUTE_BITS)) ? S_IXGRP : 0;
911 if((*mask) & GENERIC_ALL_ACCESS)
912 mode = S_IROTH|S_IWOTH|S_IXOTH;
914 mode |= ((*mask) & (GENERIC_READ_ACCESS|FILE_SPECIFIC_READ_BITS)) ? S_IROTH : 0;
915 mode |= ((*mask) & (GENERIC_WRITE_ACCESS|FILE_SPECIFIC_WRITE_BITS)) ? S_IWOTH : 0;
916 mode |= ((*mask) & (GENERIC_EXECUTE_ACCESS|FILE_SPECIFIC_EXECUTE_BITS)) ? S_IXOTH : 0;
924 /****************************************************************************
925 Unpack a SEC_DESC into a UNIX owner and group.
926 ****************************************************************************/
928 NTSTATUS unpack_nt_owners(int snum, uid_t *puser, gid_t *pgrp, uint32 security_info_sent, SEC_DESC *psd)
936 if(security_info_sent == 0) {
937 DEBUG(0,("unpack_nt_owners: no security info sent !\n"));
942 * Validate the owner and group SID's.
945 memset(&owner_sid, '\0', sizeof(owner_sid));
946 memset(&grp_sid, '\0', sizeof(grp_sid));
948 DEBUG(5,("unpack_nt_owners: validating owner_sids.\n"));
951 * Don't immediately fail if the owner sid cannot be validated.
952 * This may be a group chown only set.
955 if (security_info_sent & OWNER_SECURITY_INFORMATION) {
956 sid_copy(&owner_sid, psd->owner_sid);
957 if (!sid_to_uid(&owner_sid, puser)) {
958 if (lp_force_unknown_acl_user(snum)) {
959 /* this allows take ownership to work
961 *puser = current_user.ut.uid;
963 DEBUG(3,("unpack_nt_owners: unable to validate"
964 " owner sid for %s\n",
965 sid_string_static(&owner_sid)));
966 return NT_STATUS_INVALID_OWNER;
969 DEBUG(3,("unpack_nt_owners: owner sid mapped to uid %u\n",
970 (unsigned int)*puser ));
974 * Don't immediately fail if the group sid cannot be validated.
975 * This may be an owner chown only set.
978 if (security_info_sent & GROUP_SECURITY_INFORMATION) {
979 sid_copy(&grp_sid, psd->group_sid);
980 if (!sid_to_gid( &grp_sid, pgrp)) {
981 if (lp_force_unknown_acl_user(snum)) {
982 /* this allows take group ownership to work
984 *pgrp = current_user.ut.gid;
986 DEBUG(3,("unpack_nt_owners: unable to validate"
988 return NT_STATUS_INVALID_OWNER;
991 DEBUG(3,("unpack_nt_owners: group sid mapped to gid %u\n",
992 (unsigned int)*pgrp));
995 DEBUG(5,("unpack_nt_owners: owner_sids validated.\n"));
1000 /****************************************************************************
1001 Ensure the enforced permissions for this share apply.
1002 ****************************************************************************/
1004 static void apply_default_perms(files_struct *fsp, canon_ace *pace, mode_t type)
1006 int snum = SNUM(fsp->conn);
1007 mode_t and_bits = (mode_t)0;
1008 mode_t or_bits = (mode_t)0;
1010 /* Get the initial bits to apply. */
1012 if (fsp->is_directory) {
1013 and_bits = lp_dir_security_mask(snum);
1014 or_bits = lp_force_dir_security_mode(snum);
1016 and_bits = lp_security_mask(snum);
1017 or_bits = lp_force_security_mode(snum);
1020 /* Now bounce them into the S_USR space. */
1023 /* Ensure owner has read access. */
1024 pace->perms |= S_IRUSR;
1025 if (fsp->is_directory)
1026 pace->perms |= (S_IWUSR|S_IXUSR);
1027 and_bits = unix_perms_to_acl_perms(and_bits, S_IRUSR, S_IWUSR, S_IXUSR);
1028 or_bits = unix_perms_to_acl_perms(or_bits, S_IRUSR, S_IWUSR, S_IXUSR);
1031 and_bits = unix_perms_to_acl_perms(and_bits, S_IRGRP, S_IWGRP, S_IXGRP);
1032 or_bits = unix_perms_to_acl_perms(or_bits, S_IRGRP, S_IWGRP, S_IXGRP);
1035 and_bits = unix_perms_to_acl_perms(and_bits, S_IROTH, S_IWOTH, S_IXOTH);
1036 or_bits = unix_perms_to_acl_perms(or_bits, S_IROTH, S_IWOTH, S_IXOTH);
1040 pace->perms = ((pace->perms & and_bits)|or_bits);
1043 /****************************************************************************
1044 Check if a given uid/SID is in a group gid/SID. This is probably very
1045 expensive and will need optimisation. A *lot* of optimisation :-). JRA.
1046 ****************************************************************************/
1048 static BOOL uid_entry_in_group( canon_ace *uid_ace, canon_ace *group_ace )
1052 /* "Everyone" always matches every uid. */
1054 if (sid_equal(&group_ace->trustee, &global_sid_World))
1057 /* Assume that the current user is in the current group (force group) */
1059 if (uid_ace->unix_ug.uid == current_user.ut.uid && group_ace->unix_ug.gid == current_user.ut.gid)
1062 fstrcpy(u_name, uidtoname(uid_ace->unix_ug.uid));
1063 return user_in_group_sid(u_name, &group_ace->trustee);
1066 /****************************************************************************
1067 A well formed POSIX file or default ACL has at least 3 entries, a
1068 SMB_ACL_USER_OBJ, SMB_ACL_GROUP_OBJ, SMB_ACL_OTHER_OBJ.
1069 In addition, the owner must always have at least read access.
1070 When using this call on get_acl, the pst struct is valid and contains
1071 the mode of the file. When using this call on set_acl, the pst struct has
1072 been modified to have a mode containing the default for this file or directory
1074 ****************************************************************************/
1076 static BOOL ensure_canon_entry_valid(canon_ace **pp_ace,
1078 const DOM_SID *pfile_owner_sid,
1079 const DOM_SID *pfile_grp_sid,
1080 SMB_STRUCT_STAT *pst,
1084 BOOL got_user = False;
1085 BOOL got_grp = False;
1086 BOOL got_other = False;
1087 canon_ace *pace_other = NULL;
1089 for (pace = *pp_ace; pace; pace = pace->next) {
1090 if (pace->type == SMB_ACL_USER_OBJ) {
1093 apply_default_perms(fsp, pace, S_IRUSR);
1096 } else if (pace->type == SMB_ACL_GROUP_OBJ) {
1099 * Ensure create mask/force create mode is respected on set.
1103 apply_default_perms(fsp, pace, S_IRGRP);
1106 } else if (pace->type == SMB_ACL_OTHER) {
1109 * Ensure create mask/force create mode is respected on set.
1113 apply_default_perms(fsp, pace, S_IROTH);
1120 if ((pace = SMB_MALLOC_P(canon_ace)) == NULL) {
1121 DEBUG(0,("ensure_canon_entry_valid: malloc fail.\n"));
1126 pace->type = SMB_ACL_USER_OBJ;
1127 pace->owner_type = UID_ACE;
1128 pace->unix_ug.uid = pst->st_uid;
1129 pace->trustee = *pfile_owner_sid;
1130 pace->attr = ALLOW_ACE;
1133 /* See if the owning user is in any of the other groups in
1134 the ACE. If so, OR in the permissions from that group. */
1136 BOOL group_matched = False;
1137 canon_ace *pace_iter;
1139 for (pace_iter = *pp_ace; pace_iter; pace_iter = pace_iter->next) {
1140 if (pace_iter->type == SMB_ACL_GROUP_OBJ || pace_iter->type == SMB_ACL_GROUP) {
1141 if (uid_entry_in_group(pace, pace_iter)) {
1142 pace->perms |= pace_iter->perms;
1143 group_matched = True;
1148 /* If we only got an "everyone" perm, just use that. */
1149 if (!group_matched) {
1151 pace->perms = pace_other->perms;
1156 apply_default_perms(fsp, pace, S_IRUSR);
1158 pace->perms = unix_perms_to_acl_perms(pst->st_mode, S_IRUSR, S_IWUSR, S_IXUSR);
1161 DLIST_ADD(*pp_ace, pace);
1165 if ((pace = SMB_MALLOC_P(canon_ace)) == NULL) {
1166 DEBUG(0,("ensure_canon_entry_valid: malloc fail.\n"));
1171 pace->type = SMB_ACL_GROUP_OBJ;
1172 pace->owner_type = GID_ACE;
1173 pace->unix_ug.uid = pst->st_gid;
1174 pace->trustee = *pfile_grp_sid;
1175 pace->attr = ALLOW_ACE;
1177 /* If we only got an "everyone" perm, just use that. */
1179 pace->perms = pace_other->perms;
1182 apply_default_perms(fsp, pace, S_IRGRP);
1184 pace->perms = unix_perms_to_acl_perms(pst->st_mode, S_IRGRP, S_IWGRP, S_IXGRP);
1187 DLIST_ADD(*pp_ace, pace);
1191 if ((pace = SMB_MALLOC_P(canon_ace)) == NULL) {
1192 DEBUG(0,("ensure_canon_entry_valid: malloc fail.\n"));
1197 pace->type = SMB_ACL_OTHER;
1198 pace->owner_type = WORLD_ACE;
1199 pace->unix_ug.world = -1;
1200 pace->trustee = global_sid_World;
1201 pace->attr = ALLOW_ACE;
1204 apply_default_perms(fsp, pace, S_IROTH);
1206 pace->perms = unix_perms_to_acl_perms(pst->st_mode, S_IROTH, S_IWOTH, S_IXOTH);
1208 DLIST_ADD(*pp_ace, pace);
1214 /****************************************************************************
1215 Check if a POSIX ACL has the required SMB_ACL_USER_OBJ and SMB_ACL_GROUP_OBJ entries.
1216 If it does not have them, check if there are any entries where the trustee is the
1217 file owner or the owning group, and map these to SMB_ACL_USER_OBJ and SMB_ACL_GROUP_OBJ.
1218 ****************************************************************************/
1220 static void check_owning_objs(canon_ace *ace, DOM_SID *pfile_owner_sid, DOM_SID *pfile_grp_sid)
1222 BOOL got_user_obj, got_group_obj;
1223 canon_ace *current_ace;
1226 entries = count_canon_ace_list(ace);
1227 got_user_obj = False;
1228 got_group_obj = False;
1230 for (i=0, current_ace = ace; i < entries; i++, current_ace = current_ace->next) {
1231 if (current_ace->type == SMB_ACL_USER_OBJ)
1232 got_user_obj = True;
1233 else if (current_ace->type == SMB_ACL_GROUP_OBJ)
1234 got_group_obj = True;
1236 if (got_user_obj && got_group_obj) {
1237 DEBUG(10,("check_owning_objs: ACL had owning user/group entries.\n"));
1241 for (i=0, current_ace = ace; i < entries; i++, current_ace = current_ace->next) {
1242 if (!got_user_obj && current_ace->owner_type == UID_ACE &&
1243 sid_equal(¤t_ace->trustee, pfile_owner_sid)) {
1244 current_ace->type = SMB_ACL_USER_OBJ;
1245 got_user_obj = True;
1247 if (!got_group_obj && current_ace->owner_type == GID_ACE &&
1248 sid_equal(¤t_ace->trustee, pfile_grp_sid)) {
1249 current_ace->type = SMB_ACL_GROUP_OBJ;
1250 got_group_obj = True;
1254 DEBUG(10,("check_owning_objs: ACL is missing an owner entry.\n"));
1256 DEBUG(10,("check_owning_objs: ACL is missing an owning group entry.\n"));
1259 /****************************************************************************
1260 Unpack a SEC_DESC into two canonical ace lists.
1261 ****************************************************************************/
1263 static BOOL create_canon_ace_lists(files_struct *fsp, SMB_STRUCT_STAT *pst,
1264 DOM_SID *pfile_owner_sid,
1265 DOM_SID *pfile_grp_sid,
1266 canon_ace **ppfile_ace, canon_ace **ppdir_ace,
1269 BOOL all_aces_are_inherit_only = (fsp->is_directory ? True : False);
1270 canon_ace *file_ace = NULL;
1271 canon_ace *dir_ace = NULL;
1272 canon_ace *current_ace = NULL;
1273 BOOL got_dir_allow = False;
1274 BOOL got_file_allow = False;
1281 * Convert the incoming ACL into a more regular form.
1284 for(i = 0; i < dacl->num_aces; i++) {
1285 SEC_ACE *psa = &dacl->aces[i];
1287 if((psa->type != SEC_ACE_TYPE_ACCESS_ALLOWED) && (psa->type != SEC_ACE_TYPE_ACCESS_DENIED)) {
1288 DEBUG(3,("create_canon_ace_lists: unable to set anything but an ALLOW or DENY ACE.\n"));
1292 if (nt4_compatible_acls()) {
1294 * The security mask may be UNIX_ACCESS_NONE which should map into
1295 * no permissions (we overload the WRITE_OWNER bit for this) or it
1296 * should be one of the ALL/EXECUTE/READ/WRITE bits. Arrange for this
1297 * to be so. Any other bits override the UNIX_ACCESS_NONE bit.
1301 * Convert GENERIC bits to specific bits.
1304 se_map_generic(&psa->access_mask, &file_generic_mapping);
1306 psa->access_mask &= (UNIX_ACCESS_NONE|FILE_ALL_ACCESS);
1308 if(psa->access_mask != UNIX_ACCESS_NONE)
1309 psa->access_mask &= ~UNIX_ACCESS_NONE;
1314 * Deal with the fact that NT 4.x re-writes the canonical format
1315 * that we return for default ACLs. If a directory ACE is identical
1316 * to a inherited directory ACE then NT changes the bits so that the
1317 * first ACE is set to OI|IO and the second ACE for this SID is set
1318 * to CI. We need to repair this. JRA.
1321 for(i = 0; i < dacl->num_aces; i++) {
1322 SEC_ACE *psa1 = &dacl->aces[i];
1324 for (j = i + 1; j < dacl->num_aces; j++) {
1325 SEC_ACE *psa2 = &dacl->aces[j];
1327 if (psa1->access_mask != psa2->access_mask)
1330 if (!sid_equal(&psa1->trustee, &psa2->trustee))
1334 * Ok - permission bits and SIDs are equal.
1335 * Check if flags were re-written.
1338 if (psa1->flags & SEC_ACE_FLAG_INHERIT_ONLY) {
1340 psa1->flags |= (psa2->flags & (SEC_ACE_FLAG_CONTAINER_INHERIT|SEC_ACE_FLAG_OBJECT_INHERIT));
1341 psa2->flags &= ~(SEC_ACE_FLAG_CONTAINER_INHERIT|SEC_ACE_FLAG_OBJECT_INHERIT);
1343 } else if (psa2->flags & SEC_ACE_FLAG_INHERIT_ONLY) {
1345 psa2->flags |= (psa1->flags & (SEC_ACE_FLAG_CONTAINER_INHERIT|SEC_ACE_FLAG_OBJECT_INHERIT));
1346 psa1->flags &= ~(SEC_ACE_FLAG_CONTAINER_INHERIT|SEC_ACE_FLAG_OBJECT_INHERIT);
1352 for(i = 0; i < dacl->num_aces; i++) {
1353 SEC_ACE *psa = &dacl->aces[i];
1356 * Create a cannon_ace entry representing this NT DACL ACE.
1359 if ((current_ace = SMB_MALLOC_P(canon_ace)) == NULL) {
1360 free_canon_ace_list(file_ace);
1361 free_canon_ace_list(dir_ace);
1362 DEBUG(0,("create_canon_ace_lists: malloc fail.\n"));
1366 ZERO_STRUCTP(current_ace);
1368 sid_copy(¤t_ace->trustee, &psa->trustee);
1371 * Try and work out if the SID is a user or group
1372 * as we need to flag these differently for POSIX.
1373 * Note what kind of a POSIX ACL this should map to.
1376 if( sid_equal(¤t_ace->trustee, &global_sid_World)) {
1377 current_ace->owner_type = WORLD_ACE;
1378 current_ace->unix_ug.world = -1;
1379 current_ace->type = SMB_ACL_OTHER;
1380 } else if (sid_equal(¤t_ace->trustee, &global_sid_Creator_Owner)) {
1381 current_ace->owner_type = UID_ACE;
1382 current_ace->unix_ug.uid = pst->st_uid;
1383 current_ace->type = SMB_ACL_USER_OBJ;
1386 * The Creator Owner entry only specifies inheritable permissions,
1387 * never access permissions. WinNT doesn't always set the ACE to
1388 *INHERIT_ONLY, though.
1391 if (nt4_compatible_acls())
1392 psa->flags |= SEC_ACE_FLAG_INHERIT_ONLY;
1393 } else if (sid_equal(¤t_ace->trustee, &global_sid_Creator_Group)) {
1394 current_ace->owner_type = GID_ACE;
1395 current_ace->unix_ug.gid = pst->st_gid;
1396 current_ace->type = SMB_ACL_GROUP_OBJ;
1399 * The Creator Group entry only specifies inheritable permissions,
1400 * never access permissions. WinNT doesn't always set the ACE to
1401 *INHERIT_ONLY, though.
1403 if (nt4_compatible_acls())
1404 psa->flags |= SEC_ACE_FLAG_INHERIT_ONLY;
1406 } else if (sid_to_uid( ¤t_ace->trustee, ¤t_ace->unix_ug.uid)) {
1407 current_ace->owner_type = UID_ACE;
1408 current_ace->type = SMB_ACL_USER;
1409 } else if (sid_to_gid( ¤t_ace->trustee, ¤t_ace->unix_ug.gid)) {
1410 current_ace->owner_type = GID_ACE;
1411 current_ace->type = SMB_ACL_GROUP;
1416 * Silently ignore map failures in non-mappable SIDs (NT Authority, BUILTIN etc).
1419 if (non_mappable_sid(&psa->trustee)) {
1420 DEBUG(10,("create_canon_ace_lists: ignoring non-mappable SID %s\n",
1421 sid_to_string(str, &psa->trustee) ));
1422 SAFE_FREE(current_ace);
1426 free_canon_ace_list(file_ace);
1427 free_canon_ace_list(dir_ace);
1428 DEBUG(0,("create_canon_ace_lists: unable to map SID %s to uid or gid.\n",
1429 sid_to_string(str, ¤t_ace->trustee) ));
1430 SAFE_FREE(current_ace);
1435 * Map the given NT permissions into a UNIX mode_t containing only
1436 * S_I(R|W|X)USR bits.
1439 current_ace->perms |= map_nt_perms( &psa->access_mask, S_IRUSR);
1440 current_ace->attr = (psa->type == SEC_ACE_TYPE_ACCESS_ALLOWED) ? ALLOW_ACE : DENY_ACE;
1441 current_ace->inherited = ((psa->flags & SEC_ACE_FLAG_INHERITED_ACE) ? True : False);
1444 * Now add the created ace to either the file list, the directory
1445 * list, or both. We *MUST* preserve the order here (hence we use
1446 * DLIST_ADD_END) as NT ACLs are order dependent.
1449 if (fsp->is_directory) {
1452 * We can only add to the default POSIX ACE list if the ACE is
1453 * designed to be inherited by both files and directories.
1456 if ((psa->flags & (SEC_ACE_FLAG_OBJECT_INHERIT|SEC_ACE_FLAG_CONTAINER_INHERIT)) ==
1457 (SEC_ACE_FLAG_OBJECT_INHERIT|SEC_ACE_FLAG_CONTAINER_INHERIT)) {
1459 DLIST_ADD_END(dir_ace, current_ace, canon_ace *);
1462 * Note if this was an allow ace. We can't process
1463 * any further deny ace's after this.
1466 if (current_ace->attr == ALLOW_ACE)
1467 got_dir_allow = True;
1469 if ((current_ace->attr == DENY_ACE) && got_dir_allow) {
1470 DEBUG(0,("create_canon_ace_lists: malformed ACL in inheritable ACL ! \
1471 Deny entry after Allow entry. Failing to set on file %s.\n", fsp->fsp_name ));
1472 free_canon_ace_list(file_ace);
1473 free_canon_ace_list(dir_ace);
1477 if( DEBUGLVL( 10 )) {
1478 dbgtext("create_canon_ace_lists: adding dir ACL:\n");
1479 print_canon_ace( current_ace, 0);
1483 * If this is not an inherit only ACE we need to add a duplicate
1487 if (!(psa->flags & SEC_ACE_FLAG_INHERIT_ONLY)) {
1488 canon_ace *dup_ace = dup_canon_ace(current_ace);
1491 DEBUG(0,("create_canon_ace_lists: malloc fail !\n"));
1492 free_canon_ace_list(file_ace);
1493 free_canon_ace_list(dir_ace);
1498 * We must not free current_ace here as its
1499 * pointer is now owned by the dir_ace list.
1501 current_ace = dup_ace;
1504 * We must not free current_ace here as its
1505 * pointer is now owned by the dir_ace list.
1513 * Only add to the file ACL if not inherit only.
1516 if (current_ace && !(psa->flags & SEC_ACE_FLAG_INHERIT_ONLY)) {
1517 DLIST_ADD_END(file_ace, current_ace, canon_ace *);
1520 * Note if this was an allow ace. We can't process
1521 * any further deny ace's after this.
1524 if (current_ace->attr == ALLOW_ACE)
1525 got_file_allow = True;
1527 if ((current_ace->attr == DENY_ACE) && got_file_allow) {
1528 DEBUG(0,("create_canon_ace_lists: malformed ACL in file ACL ! \
1529 Deny entry after Allow entry. Failing to set on file %s.\n", fsp->fsp_name ));
1530 free_canon_ace_list(file_ace);
1531 free_canon_ace_list(dir_ace);
1535 if( DEBUGLVL( 10 )) {
1536 dbgtext("create_canon_ace_lists: adding file ACL:\n");
1537 print_canon_ace( current_ace, 0);
1539 all_aces_are_inherit_only = False;
1541 * We must not free current_ace here as its
1542 * pointer is now owned by the file_ace list.
1548 * Free if ACE was not added.
1551 SAFE_FREE(current_ace);
1554 if (fsp->is_directory && all_aces_are_inherit_only) {
1556 * Windows 2000 is doing one of these weird 'inherit acl'
1557 * traverses to conserve NTFS ACL resources. Just pretend
1558 * there was no DACL sent. JRA.
1561 DEBUG(10,("create_canon_ace_lists: Win2k inherit acl traverse. Ignoring DACL.\n"));
1562 free_canon_ace_list(file_ace);
1563 free_canon_ace_list(dir_ace);
1568 * Check if we have SMB_ACL_USER_OBJ and SMB_ACL_GROUP_OBJ entries in each
1569 * ACL. If we don't have them, check if any SMB_ACL_USER/SMB_ACL_GROUP
1570 * entries can be converted to *_OBJ. Usually we will already have these
1571 * entries in the Default ACL, and the Access ACL will not have them.
1574 check_owning_objs(file_ace, pfile_owner_sid, pfile_grp_sid);
1577 check_owning_objs(dir_ace, pfile_owner_sid, pfile_grp_sid);
1581 *ppfile_ace = file_ace;
1582 *ppdir_ace = dir_ace;
1587 /****************************************************************************
1588 ASCII art time again... JRA :-).
1590 We have 4 cases to process when moving from an NT ACL to a POSIX ACL. Firstly,
1591 we insist the ACL is in canonical form (ie. all DENY entries preceede ALLOW
1592 entries). Secondly, the merge code has ensured that all duplicate SID entries for
1593 allow or deny have been merged, so the same SID can only appear once in the deny
1594 list or once in the allow list.
1596 We then process as follows :
1598 ---------------------------------------------------------------------------
1599 First pass - look for a Everyone DENY entry.
1601 If it is deny all (rwx) trunate the list at this point.
1602 Else, walk the list from this point and use the deny permissions of this
1603 entry as a mask on all following allow entries. Finally, delete
1604 the Everyone DENY entry (we have applied it to everything possible).
1606 In addition, in this pass we remove any DENY entries that have
1607 no permissions (ie. they are a DENY nothing).
1608 ---------------------------------------------------------------------------
1609 Second pass - only deal with deny user entries.
1611 DENY user1 (perms XXX)
1614 for all following allow group entries where user1 is in group
1615 new_perms |= group_perms;
1617 user1 entry perms = new_perms & ~ XXX;
1619 Convert the deny entry to an allow entry with the new perms and
1620 push to the end of the list. Note if the user was in no groups
1621 this maps to a specific allow nothing entry for this user.
1623 The common case from the NT ACL choser (userX deny all) is
1624 optimised so we don't do the group lookup - we just map to
1625 an allow nothing entry.
1627 What we're doing here is inferring the allow permissions the
1628 person setting the ACE on user1 wanted by looking at the allow
1629 permissions on the groups the user is currently in. This will
1630 be a snapshot, depending on group membership but is the best
1631 we can do and has the advantage of failing closed rather than
1633 ---------------------------------------------------------------------------
1634 Third pass - only deal with deny group entries.
1636 DENY group1 (perms XXX)
1638 for all following allow user entries where user is in group1
1639 user entry perms = user entry perms & ~ XXX;
1641 If there is a group Everyone allow entry with permissions YYY,
1642 convert the group1 entry to an allow entry and modify its
1645 new_perms = YYY & ~ XXX
1647 and push to the end of the list.
1649 If there is no group Everyone allow entry then convert the
1650 group1 entry to a allow nothing entry and push to the end of the list.
1652 Note that the common case from the NT ACL choser (groupX deny all)
1653 cannot be optimised here as we need to modify user entries who are
1654 in the group to change them to a deny all also.
1656 What we're doing here is modifying the allow permissions of
1657 user entries (which are more specific in POSIX ACLs) to mask
1658 out the explicit deny set on the group they are in. This will
1659 be a snapshot depending on current group membership but is the
1660 best we can do and has the advantage of failing closed rather
1662 ---------------------------------------------------------------------------
1663 Fourth pass - cope with cumulative permissions.
1665 for all allow user entries, if there exists an allow group entry with
1666 more permissive permissions, and the user is in that group, rewrite the
1667 allow user permissions to contain both sets of permissions.
1669 Currently the code for this is #ifdef'ed out as these semantics make
1670 no sense to me. JRA.
1671 ---------------------------------------------------------------------------
1673 Note we *MUST* do the deny user pass first as this will convert deny user
1674 entries into allow user entries which can then be processed by the deny
1677 The above algorithm took a *lot* of thinking about - hence this
1678 explaination :-). JRA.
1679 ****************************************************************************/
1681 /****************************************************************************
1682 Process a canon_ace list entries. This is very complex code. We need
1683 to go through and remove the "deny" permissions from any allow entry that matches
1684 the id of this entry. We have already refused any NT ACL that wasn't in correct
1685 order (DENY followed by ALLOW). If any allow entry ends up with zero permissions,
1686 we just remove it (to fail safe). We have already removed any duplicate ace
1687 entries. Treat an "Everyone" DENY_ACE as a special case - use it to mask all
1689 ****************************************************************************/
1691 static void process_deny_list( canon_ace **pp_ace_list )
1693 canon_ace *ace_list = *pp_ace_list;
1694 canon_ace *curr_ace = NULL;
1695 canon_ace *curr_ace_next = NULL;
1697 /* Pass 1 above - look for an Everyone, deny entry. */
1699 for (curr_ace = ace_list; curr_ace; curr_ace = curr_ace_next) {
1700 canon_ace *allow_ace_p;
1702 curr_ace_next = curr_ace->next; /* So we can't lose the link. */
1704 if (curr_ace->attr != DENY_ACE)
1707 if (curr_ace->perms == (mode_t)0) {
1709 /* Deny nothing entry - delete. */
1711 DLIST_REMOVE(ace_list, curr_ace);
1715 if (!sid_equal(&curr_ace->trustee, &global_sid_World))
1718 /* JRATEST - assert. */
1719 SMB_ASSERT(curr_ace->owner_type == WORLD_ACE);
1721 if (curr_ace->perms == ALL_ACE_PERMS) {
1724 * Optimisation. This is a DENY_ALL to Everyone. Truncate the
1725 * list at this point including this entry.
1728 canon_ace *prev_entry = curr_ace->prev;
1730 free_canon_ace_list( curr_ace );
1732 prev_entry->next = NULL;
1734 /* We deleted the entire list. */
1740 for (allow_ace_p = curr_ace->next; allow_ace_p; allow_ace_p = allow_ace_p->next) {
1743 * Only mask off allow entries.
1746 if (allow_ace_p->attr != ALLOW_ACE)
1749 allow_ace_p->perms &= ~curr_ace->perms;
1753 * Now it's been applied, remove it.
1756 DLIST_REMOVE(ace_list, curr_ace);
1759 /* Pass 2 above - deal with deny user entries. */
1761 for (curr_ace = ace_list; curr_ace; curr_ace = curr_ace_next) {
1762 mode_t new_perms = (mode_t)0;
1763 canon_ace *allow_ace_p;
1765 curr_ace_next = curr_ace->next; /* So we can't lose the link. */
1767 if (curr_ace->attr != DENY_ACE)
1770 if (curr_ace->owner_type != UID_ACE)
1773 if (curr_ace->perms == ALL_ACE_PERMS) {
1776 * Optimisation - this is a deny everything to this user.
1777 * Convert to an allow nothing and push to the end of the list.
1780 curr_ace->attr = ALLOW_ACE;
1781 curr_ace->perms = (mode_t)0;
1782 DLIST_DEMOTE(ace_list, curr_ace, canon_ace *);
1786 for (allow_ace_p = curr_ace->next; allow_ace_p; allow_ace_p = allow_ace_p->next) {
1788 if (allow_ace_p->attr != ALLOW_ACE)
1791 /* We process GID_ACE and WORLD_ACE entries only. */
1793 if (allow_ace_p->owner_type == UID_ACE)
1796 if (uid_entry_in_group( curr_ace, allow_ace_p))
1797 new_perms |= allow_ace_p->perms;
1801 * Convert to a allow entry, modify the perms and push to the end
1805 curr_ace->attr = ALLOW_ACE;
1806 curr_ace->perms = (new_perms & ~curr_ace->perms);
1807 DLIST_DEMOTE(ace_list, curr_ace, canon_ace *);
1810 /* Pass 3 above - deal with deny group entries. */
1812 for (curr_ace = ace_list; curr_ace; curr_ace = curr_ace_next) {
1813 canon_ace *allow_ace_p;
1814 canon_ace *allow_everyone_p = NULL;
1816 curr_ace_next = curr_ace->next; /* So we can't lose the link. */
1818 if (curr_ace->attr != DENY_ACE)
1821 if (curr_ace->owner_type != GID_ACE)
1824 for (allow_ace_p = curr_ace->next; allow_ace_p; allow_ace_p = allow_ace_p->next) {
1826 if (allow_ace_p->attr != ALLOW_ACE)
1829 /* Store a pointer to the Everyone allow, if it exists. */
1830 if (allow_ace_p->owner_type == WORLD_ACE)
1831 allow_everyone_p = allow_ace_p;
1833 /* We process UID_ACE entries only. */
1835 if (allow_ace_p->owner_type != UID_ACE)
1838 /* Mask off the deny group perms. */
1840 if (uid_entry_in_group( allow_ace_p, curr_ace))
1841 allow_ace_p->perms &= ~curr_ace->perms;
1845 * Convert the deny to an allow with the correct perms and
1846 * push to the end of the list.
1849 curr_ace->attr = ALLOW_ACE;
1850 if (allow_everyone_p)
1851 curr_ace->perms = allow_everyone_p->perms & ~curr_ace->perms;
1853 curr_ace->perms = (mode_t)0;
1854 DLIST_DEMOTE(ace_list, curr_ace, canon_ace *);
1857 /* Doing this fourth pass allows Windows semantics to be layered
1858 * on top of POSIX semantics. I'm not sure if this is desirable.
1859 * For example, in W2K ACLs there is no way to say, "Group X no
1860 * access, user Y full access" if user Y is a member of group X.
1861 * This seems completely broken semantics to me.... JRA.
1865 /* Pass 4 above - deal with allow entries. */
1867 for (curr_ace = ace_list; curr_ace; curr_ace = curr_ace_next) {
1868 canon_ace *allow_ace_p;
1870 curr_ace_next = curr_ace->next; /* So we can't lose the link. */
1872 if (curr_ace->attr != ALLOW_ACE)
1875 if (curr_ace->owner_type != UID_ACE)
1878 for (allow_ace_p = ace_list; allow_ace_p; allow_ace_p = allow_ace_p->next) {
1880 if (allow_ace_p->attr != ALLOW_ACE)
1883 /* We process GID_ACE entries only. */
1885 if (allow_ace_p->owner_type != GID_ACE)
1888 /* OR in the group perms. */
1890 if (uid_entry_in_group( curr_ace, allow_ace_p))
1891 curr_ace->perms |= allow_ace_p->perms;
1896 *pp_ace_list = ace_list;
1899 /****************************************************************************
1900 Create a default mode that will be used if a security descriptor entry has
1901 no user/group/world entries.
1902 ****************************************************************************/
1904 static mode_t create_default_mode(files_struct *fsp, BOOL interitable_mode)
1906 int snum = SNUM(fsp->conn);
1907 mode_t and_bits = (mode_t)0;
1908 mode_t or_bits = (mode_t)0;
1909 mode_t mode = interitable_mode
1910 ? unix_mode( fsp->conn, FILE_ATTRIBUTE_ARCHIVE, fsp->fsp_name,
1914 if (fsp->is_directory)
1915 mode |= (S_IWUSR|S_IXUSR);
1918 * Now AND with the create mode/directory mode bits then OR with the
1919 * force create mode/force directory mode bits.
1922 if (fsp->is_directory) {
1923 and_bits = lp_dir_security_mask(snum);
1924 or_bits = lp_force_dir_security_mode(snum);
1926 and_bits = lp_security_mask(snum);
1927 or_bits = lp_force_security_mode(snum);
1930 return ((mode & and_bits)|or_bits);
1933 /****************************************************************************
1934 Unpack a SEC_DESC into two canonical ace lists. We don't depend on this
1936 ****************************************************************************/
1938 static BOOL unpack_canon_ace(files_struct *fsp,
1939 SMB_STRUCT_STAT *pst,
1940 DOM_SID *pfile_owner_sid,
1941 DOM_SID *pfile_grp_sid,
1942 canon_ace **ppfile_ace, canon_ace **ppdir_ace,
1943 uint32 security_info_sent, SEC_DESC *psd)
1945 canon_ace *file_ace = NULL;
1946 canon_ace *dir_ace = NULL;
1951 if(security_info_sent == 0) {
1952 DEBUG(0,("unpack_canon_ace: no security info sent !\n"));
1957 * If no DACL then this is a chown only security descriptor.
1960 if(!(security_info_sent & DACL_SECURITY_INFORMATION) || !psd->dacl)
1964 * Now go through the DACL and create the canon_ace lists.
1967 if (!create_canon_ace_lists( fsp, pst, pfile_owner_sid, pfile_grp_sid,
1968 &file_ace, &dir_ace, psd->dacl))
1971 if ((file_ace == NULL) && (dir_ace == NULL)) {
1972 /* W2K traverse DACL set - ignore. */
1977 * Go through the canon_ace list and merge entries
1978 * belonging to identical users of identical allow or deny type.
1979 * We can do this as all deny entries come first, followed by
1980 * all allow entries (we have mandated this before accepting this acl).
1983 print_canon_ace_list( "file ace - before merge", file_ace);
1984 merge_aces( &file_ace );
1986 print_canon_ace_list( "dir ace - before merge", dir_ace);
1987 merge_aces( &dir_ace );
1990 * NT ACLs are order dependent. Go through the acl lists and
1991 * process DENY entries by masking the allow entries.
1994 print_canon_ace_list( "file ace - before deny", file_ace);
1995 process_deny_list( &file_ace);
1997 print_canon_ace_list( "dir ace - before deny", dir_ace);
1998 process_deny_list( &dir_ace);
2001 * A well formed POSIX file or default ACL has at least 3 entries, a
2002 * SMB_ACL_USER_OBJ, SMB_ACL_GROUP_OBJ, SMB_ACL_OTHER_OBJ
2003 * and optionally a mask entry. Ensure this is the case.
2006 print_canon_ace_list( "file ace - before valid", file_ace);
2009 * A default 3 element mode entry for a file should be r-- --- ---.
2010 * A default 3 element mode entry for a directory should be rwx --- ---.
2013 pst->st_mode = create_default_mode(fsp, False);
2015 if (!ensure_canon_entry_valid(&file_ace, fsp, pfile_owner_sid, pfile_grp_sid, pst, True)) {
2016 free_canon_ace_list(file_ace);
2017 free_canon_ace_list(dir_ace);
2021 print_canon_ace_list( "dir ace - before valid", dir_ace);
2024 * A default inheritable 3 element mode entry for a directory should be the
2025 * mode Samba will use to create a file within. Ensure user rwx bits are set if
2029 pst->st_mode = create_default_mode(fsp, True);
2031 if (dir_ace && !ensure_canon_entry_valid(&dir_ace, fsp, pfile_owner_sid, pfile_grp_sid, pst, True)) {
2032 free_canon_ace_list(file_ace);
2033 free_canon_ace_list(dir_ace);
2037 print_canon_ace_list( "file ace - return", file_ace);
2038 print_canon_ace_list( "dir ace - return", dir_ace);
2040 *ppfile_ace = file_ace;
2041 *ppdir_ace = dir_ace;
2046 /******************************************************************************
2047 When returning permissions, try and fit NT display
2048 semantics if possible. Note the the canon_entries here must have been malloced.
2049 The list format should be - first entry = owner, followed by group and other user
2050 entries, last entry = other.
2052 Note that this doesn't exactly match the NT semantics for an ACL. As POSIX entries
2053 are not ordered, and match on the most specific entry rather than walking a list,
2054 then a simple POSIX permission of rw-r--r-- should really map to 5 entries,
2056 Entry 0: owner : deny all except read and write.
2057 Entry 1: owner : allow read and write.
2058 Entry 2: group : deny all except read.
2059 Entry 3: group : allow read.
2060 Entry 4: Everyone : allow read.
2062 But NT cannot display this in their ACL editor !
2063 ********************************************************************************/
2065 static void arrange_posix_perms( char *filename, canon_ace **pp_list_head)
2067 canon_ace *list_head = *pp_list_head;
2068 canon_ace *owner_ace = NULL;
2069 canon_ace *other_ace = NULL;
2070 canon_ace *ace = NULL;
2072 for (ace = list_head; ace; ace = ace->next) {
2073 if (ace->type == SMB_ACL_USER_OBJ)
2075 else if (ace->type == SMB_ACL_OTHER) {
2076 /* Last ace - this is "other" */
2081 if (!owner_ace || !other_ace) {
2082 DEBUG(0,("arrange_posix_perms: Invalid POSIX permissions for file %s, missing owner or other.\n",
2088 * The POSIX algorithm applies to owner first, and other last,
2089 * so ensure they are arranged in this order.
2093 DLIST_PROMOTE(list_head, owner_ace);
2097 DLIST_DEMOTE(list_head, other_ace, canon_ace *);
2100 /* We have probably changed the head of the list. */
2102 *pp_list_head = list_head;
2105 /****************************************************************************
2106 Create a linked list of canonical ACE entries.
2107 ****************************************************************************/
2109 static canon_ace *canonicalise_acl( files_struct *fsp, SMB_ACL_T posix_acl, SMB_STRUCT_STAT *psbuf,
2110 const DOM_SID *powner, const DOM_SID *pgroup, struct pai_val *pal, SMB_ACL_TYPE_T the_acl_type)
2112 connection_struct *conn = fsp->conn;
2113 mode_t acl_mask = (S_IRUSR|S_IWUSR|S_IXUSR);
2114 canon_ace *list_head = NULL;
2115 canon_ace *ace = NULL;
2116 canon_ace *next_ace = NULL;
2117 int entry_id = SMB_ACL_FIRST_ENTRY;
2118 SMB_ACL_ENTRY_T entry;
2121 while ( posix_acl && (SMB_VFS_SYS_ACL_GET_ENTRY(conn, posix_acl, entry_id, &entry) == 1)) {
2122 SMB_ACL_TAG_T tagtype;
2123 SMB_ACL_PERMSET_T permset;
2126 enum ace_owner owner_type;
2129 if (entry_id == SMB_ACL_FIRST_ENTRY)
2130 entry_id = SMB_ACL_NEXT_ENTRY;
2132 /* Is this a MASK entry ? */
2133 if (SMB_VFS_SYS_ACL_GET_TAG_TYPE(conn, entry, &tagtype) == -1)
2136 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, entry, &permset) == -1)
2139 /* Decide which SID to use based on the ACL type. */
2141 case SMB_ACL_USER_OBJ:
2142 /* Get the SID from the owner. */
2143 sid_copy(&sid, powner);
2144 unix_ug.uid = psbuf->st_uid;
2145 owner_type = UID_ACE;
2149 uid_t *puid = (uid_t *)SMB_VFS_SYS_ACL_GET_QUALIFIER(conn, entry);
2151 DEBUG(0,("canonicalise_acl: Failed to get uid.\n"));
2155 * A SMB_ACL_USER entry for the owner is shadowed by the
2156 * SMB_ACL_USER_OBJ entry and Windows also cannot represent
2157 * that entry, so we ignore it. We also don't create such
2158 * entries out of the blue when setting ACLs, so a get/set
2159 * cycle will drop them.
2161 if (the_acl_type == SMB_ACL_TYPE_ACCESS && *puid == psbuf->st_uid) {
2162 SMB_VFS_SYS_ACL_FREE_QUALIFIER(conn, (void *)puid,tagtype);
2165 uid_to_sid( &sid, *puid);
2166 unix_ug.uid = *puid;
2167 owner_type = UID_ACE;
2168 SMB_VFS_SYS_ACL_FREE_QUALIFIER(conn, (void *)puid,tagtype);
2171 case SMB_ACL_GROUP_OBJ:
2172 /* Get the SID from the owning group. */
2173 sid_copy(&sid, pgroup);
2174 unix_ug.gid = psbuf->st_gid;
2175 owner_type = GID_ACE;
2179 gid_t *pgid = (gid_t *)SMB_VFS_SYS_ACL_GET_QUALIFIER(conn, entry);
2181 DEBUG(0,("canonicalise_acl: Failed to get gid.\n"));
2184 gid_to_sid( &sid, *pgid);
2185 unix_ug.gid = *pgid;
2186 owner_type = GID_ACE;
2187 SMB_VFS_SYS_ACL_FREE_QUALIFIER(conn, (void *)pgid,tagtype);
2191 acl_mask = convert_permset_to_mode_t(conn, permset);
2192 continue; /* Don't count the mask as an entry. */
2194 /* Use the Everyone SID */
2195 sid = global_sid_World;
2197 owner_type = WORLD_ACE;
2200 DEBUG(0,("canonicalise_acl: Unknown tagtype %u\n", (unsigned int)tagtype));
2205 * Add this entry to the list.
2208 if ((ace = SMB_MALLOC_P(canon_ace)) == NULL)
2212 ace->type = tagtype;
2213 ace->perms = convert_permset_to_mode_t(conn, permset);
2214 ace->attr = ALLOW_ACE;
2216 ace->unix_ug = unix_ug;
2217 ace->owner_type = owner_type;
2218 ace->inherited = get_inherited_flag(pal, ace, (the_acl_type == SMB_ACL_TYPE_DEFAULT));
2220 DLIST_ADD(list_head, ace);
2224 * This next call will ensure we have at least a user/group/world set.
2227 if (!ensure_canon_entry_valid(&list_head, fsp, powner, pgroup, psbuf, False))
2231 * Now go through the list, masking the permissions with the
2232 * acl_mask. Ensure all DENY Entries are at the start of the list.
2235 DEBUG(10,("canonicalise_acl: %s ace entries before arrange :\n", the_acl_type == SMB_ACL_TYPE_ACCESS ? "Access" : "Default" ));
2237 for ( ace_count = 0, ace = list_head; ace; ace = next_ace, ace_count++) {
2238 next_ace = ace->next;
2240 /* Masks are only applied to entries other than USER_OBJ and OTHER. */
2241 if (ace->type != SMB_ACL_OTHER && ace->type != SMB_ACL_USER_OBJ)
2242 ace->perms &= acl_mask;
2244 if (ace->perms == 0) {
2245 DLIST_PROMOTE(list_head, ace);
2248 if( DEBUGLVL( 10 ) ) {
2249 print_canon_ace(ace, ace_count);
2253 arrange_posix_perms(fsp->fsp_name,&list_head );
2255 print_canon_ace_list( "canonicalise_acl: ace entries after arrange", list_head );
2261 free_canon_ace_list(list_head);
2265 /****************************************************************************
2266 Check if the current user group list contains a given group.
2267 ****************************************************************************/
2269 static BOOL current_user_in_group(gid_t gid)
2273 for (i = 0; i < current_user.ut.ngroups; i++) {
2274 if (current_user.ut.groups[i] == gid) {
2282 /****************************************************************************
2283 Should we override a deny ? Check deprecated 'acl group control'
2285 ****************************************************************************/
2287 static BOOL acl_group_override(connection_struct *conn, gid_t prim_gid)
2289 if ( (errno == EACCES || errno == EPERM)
2290 && (lp_acl_group_control(SNUM(conn)) || lp_dos_filemode(SNUM(conn)))
2291 && current_user_in_group(prim_gid))
2299 /****************************************************************************
2300 Attempt to apply an ACL to a file or directory.
2301 ****************************************************************************/
2303 static BOOL set_canon_ace_list(files_struct *fsp, canon_ace *the_ace, BOOL default_ace, gid_t prim_gid, BOOL *pacl_set_support)
2305 connection_struct *conn = fsp->conn;
2307 SMB_ACL_T the_acl = SMB_VFS_SYS_ACL_INIT(conn, (int)count_canon_ace_list(the_ace) + 1);
2310 SMB_ACL_ENTRY_T mask_entry;
2311 BOOL got_mask_entry = False;
2312 SMB_ACL_PERMSET_T mask_permset;
2313 SMB_ACL_TYPE_T the_acl_type = (default_ace ? SMB_ACL_TYPE_DEFAULT : SMB_ACL_TYPE_ACCESS);
2314 BOOL needs_mask = False;
2315 mode_t mask_perms = 0;
2317 #if defined(POSIX_ACL_NEEDS_MASK)
2318 /* HP-UX always wants to have a mask (called "class" there). */
2322 if (the_acl == NULL) {
2324 if (!no_acl_syscall_error(errno)) {
2326 * Only print this error message if we have some kind of ACL
2327 * support that's not working. Otherwise we would always get this.
2329 DEBUG(0,("set_canon_ace_list: Unable to init %s ACL. (%s)\n",
2330 default_ace ? "default" : "file", strerror(errno) ));
2332 *pacl_set_support = False;
2336 if( DEBUGLVL( 10 )) {
2337 dbgtext("set_canon_ace_list: setting ACL:\n");
2338 for (i = 0, p_ace = the_ace; p_ace; p_ace = p_ace->next, i++ ) {
2339 print_canon_ace( p_ace, i);
2343 for (i = 0, p_ace = the_ace; p_ace; p_ace = p_ace->next, i++ ) {
2344 SMB_ACL_ENTRY_T the_entry;
2345 SMB_ACL_PERMSET_T the_permset;
2348 * ACLs only "need" an ACL_MASK entry if there are any named user or
2349 * named group entries. But if there is an ACL_MASK entry, it applies
2350 * to ACL_USER, ACL_GROUP, and ACL_GROUP_OBJ entries. Set the mask
2351 * so that it doesn't deny (i.e., mask off) any permissions.
2354 if (p_ace->type == SMB_ACL_USER || p_ace->type == SMB_ACL_GROUP) {
2356 mask_perms |= p_ace->perms;
2357 } else if (p_ace->type == SMB_ACL_GROUP_OBJ) {
2358 mask_perms |= p_ace->perms;
2362 * Get the entry for this ACE.
2365 if (SMB_VFS_SYS_ACL_CREATE_ENTRY(conn, &the_acl, &the_entry) == -1) {
2366 DEBUG(0,("set_canon_ace_list: Failed to create entry %d. (%s)\n",
2367 i, strerror(errno) ));
2371 if (p_ace->type == SMB_ACL_MASK) {
2372 mask_entry = the_entry;
2373 got_mask_entry = True;
2377 * Ok - we now know the ACL calls should be working, don't
2378 * allow fallback to chmod.
2381 *pacl_set_support = True;
2384 * Initialise the entry from the canon_ace.
2388 * First tell the entry what type of ACE this is.
2391 if (SMB_VFS_SYS_ACL_SET_TAG_TYPE(conn, the_entry, p_ace->type) == -1) {
2392 DEBUG(0,("set_canon_ace_list: Failed to set tag type on entry %d. (%s)\n",
2393 i, strerror(errno) ));
2398 * Only set the qualifier (user or group id) if the entry is a user
2402 if ((p_ace->type == SMB_ACL_USER) || (p_ace->type == SMB_ACL_GROUP)) {
2403 if (SMB_VFS_SYS_ACL_SET_QUALIFIER(conn, the_entry,(void *)&p_ace->unix_ug.uid) == -1) {
2404 DEBUG(0,("set_canon_ace_list: Failed to set qualifier on entry %d. (%s)\n",
2405 i, strerror(errno) ));
2411 * Convert the mode_t perms in the canon_ace to a POSIX permset.
2414 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, the_entry, &the_permset) == -1) {
2415 DEBUG(0,("set_canon_ace_list: Failed to get permset on entry %d. (%s)\n",
2416 i, strerror(errno) ));
2420 if (map_acl_perms_to_permset(conn, p_ace->perms, &the_permset) == -1) {
2421 DEBUG(0,("set_canon_ace_list: Failed to create permset for mode (%u) on entry %d. (%s)\n",
2422 (unsigned int)p_ace->perms, i, strerror(errno) ));
2427 * ..and apply them to the entry.
2430 if (SMB_VFS_SYS_ACL_SET_PERMSET(conn, the_entry, the_permset) == -1) {
2431 DEBUG(0,("set_canon_ace_list: Failed to add permset on entry %d. (%s)\n",
2432 i, strerror(errno) ));
2437 print_canon_ace( p_ace, i);
2441 if (needs_mask && !got_mask_entry) {
2442 if (SMB_VFS_SYS_ACL_CREATE_ENTRY(conn, &the_acl, &mask_entry) == -1) {
2443 DEBUG(0,("set_canon_ace_list: Failed to create mask entry. (%s)\n", strerror(errno) ));
2447 if (SMB_VFS_SYS_ACL_SET_TAG_TYPE(conn, mask_entry, SMB_ACL_MASK) == -1) {
2448 DEBUG(0,("set_canon_ace_list: Failed to set tag type on mask entry. (%s)\n",strerror(errno) ));
2452 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, mask_entry, &mask_permset) == -1) {
2453 DEBUG(0,("set_canon_ace_list: Failed to get mask permset. (%s)\n", strerror(errno) ));
2457 if (map_acl_perms_to_permset(conn, S_IRUSR|S_IWUSR|S_IXUSR, &mask_permset) == -1) {
2458 DEBUG(0,("set_canon_ace_list: Failed to create mask permset. (%s)\n", strerror(errno) ));
2462 if (SMB_VFS_SYS_ACL_SET_PERMSET(conn, mask_entry, mask_permset) == -1) {
2463 DEBUG(0,("set_canon_ace_list: Failed to add mask permset. (%s)\n", strerror(errno) ));
2469 * Finally apply it to the file or directory.
2472 if(default_ace || fsp->is_directory || fsp->fh->fd == -1) {
2473 if (SMB_VFS_SYS_ACL_SET_FILE(conn, fsp->fsp_name, the_acl_type, 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_FILE(conn, fsp->fsp_name, the_acl_type, the_acl);
2497 DEBUG(2,("set_canon_ace_list: sys_acl_set_file type %s failed for file %s (%s).\n",
2498 the_acl_type == SMB_ACL_TYPE_DEFAULT ? "directory default" : "file",
2499 fsp->fsp_name, strerror(errno) ));
2504 if (SMB_VFS_SYS_ACL_SET_FD(fsp, fsp->fh->fd, the_acl) == -1) {
2506 * Some systems allow all the above calls and only fail with no ACL support
2507 * when attempting to apply the acl. HPUX with HFS is an example of this. JRA.
2509 if (no_acl_syscall_error(errno)) {
2510 *pacl_set_support = False;
2513 if (acl_group_override(conn, prim_gid)) {
2516 DEBUG(5,("set_canon_ace_list: acl group control on and current user in file %s primary group.\n",
2520 sret = SMB_VFS_SYS_ACL_SET_FD(fsp, fsp->fh->fd, the_acl);
2528 DEBUG(2,("set_canon_ace_list: sys_acl_set_file failed for file %s (%s).\n",
2529 fsp->fsp_name, strerror(errno) ));
2539 if (the_acl != NULL) {
2540 SMB_VFS_SYS_ACL_FREE_ACL(conn, the_acl);
2546 /****************************************************************************
2547 Find a particular canon_ace entry.
2548 ****************************************************************************/
2550 static struct canon_ace *canon_ace_entry_for(struct canon_ace *list, SMB_ACL_TAG_T type, posix_id *id)
2553 if (list->type == type && ((type != SMB_ACL_USER && type != SMB_ACL_GROUP) ||
2554 (type == SMB_ACL_USER && id && id->uid == list->unix_ug.uid) ||
2555 (type == SMB_ACL_GROUP && id && id->gid == list->unix_ug.gid)))
2562 /****************************************************************************
2564 ****************************************************************************/
2566 SMB_ACL_T free_empty_sys_acl(connection_struct *conn, SMB_ACL_T the_acl)
2568 SMB_ACL_ENTRY_T entry;
2572 if (SMB_VFS_SYS_ACL_GET_ENTRY(conn, the_acl, SMB_ACL_FIRST_ENTRY, &entry) != 1) {
2573 SMB_VFS_SYS_ACL_FREE_ACL(conn, the_acl);
2579 /****************************************************************************
2580 Convert a canon_ace to a generic 3 element permission - if possible.
2581 ****************************************************************************/
2583 #define MAP_PERM(p,mask,result) (((p) & (mask)) ? (result) : 0 )
2585 static BOOL convert_canon_ace_to_posix_perms( files_struct *fsp, canon_ace *file_ace_list, mode_t *posix_perms)
2587 int snum = SNUM(fsp->conn);
2588 size_t ace_count = count_canon_ace_list(file_ace_list);
2590 canon_ace *owner_ace = NULL;
2591 canon_ace *group_ace = NULL;
2592 canon_ace *other_ace = NULL;
2596 if (ace_count != 3) {
2597 DEBUG(3,("convert_canon_ace_to_posix_perms: Too many ACE entries for file %s to convert to \
2598 posix perms.\n", fsp->fsp_name ));
2602 for (ace_p = file_ace_list; ace_p; ace_p = ace_p->next) {
2603 if (ace_p->owner_type == UID_ACE)
2605 else if (ace_p->owner_type == GID_ACE)
2607 else if (ace_p->owner_type == WORLD_ACE)
2611 if (!owner_ace || !group_ace || !other_ace) {
2612 DEBUG(3,("convert_canon_ace_to_posix_perms: Can't get standard entries for file %s.\n",
2617 *posix_perms = (mode_t)0;
2619 *posix_perms |= owner_ace->perms;
2620 *posix_perms |= MAP_PERM(group_ace->perms, S_IRUSR, S_IRGRP);
2621 *posix_perms |= MAP_PERM(group_ace->perms, S_IWUSR, S_IWGRP);
2622 *posix_perms |= MAP_PERM(group_ace->perms, S_IXUSR, S_IXGRP);
2623 *posix_perms |= MAP_PERM(other_ace->perms, S_IRUSR, S_IROTH);
2624 *posix_perms |= MAP_PERM(other_ace->perms, S_IWUSR, S_IWOTH);
2625 *posix_perms |= MAP_PERM(other_ace->perms, S_IXUSR, S_IXOTH);
2627 /* The owner must have at least read access. */
2629 *posix_perms |= S_IRUSR;
2630 if (fsp->is_directory)
2631 *posix_perms |= (S_IWUSR|S_IXUSR);
2633 /* If requested apply the masks. */
2635 /* Get the initial bits to apply. */
2637 if (fsp->is_directory) {
2638 and_bits = lp_dir_security_mask(snum);
2639 or_bits = lp_force_dir_security_mode(snum);
2641 and_bits = lp_security_mask(snum);
2642 or_bits = lp_force_security_mode(snum);
2645 *posix_perms = (((*posix_perms) & and_bits)|or_bits);
2647 DEBUG(10,("convert_canon_ace_to_posix_perms: converted u=%o,g=%o,w=%o to perm=0%o for file %s.\n",
2648 (int)owner_ace->perms, (int)group_ace->perms, (int)other_ace->perms, (int)*posix_perms,
2654 /****************************************************************************
2655 Incoming NT ACLs on a directory can be split into a default POSIX acl (CI|OI|IO) and
2656 a normal POSIX acl. Win2k needs these split acls re-merging into one ACL
2657 with CI|OI set so it is inherited and also applies to the directory.
2658 Based on code from "Jim McDonough" <jmcd@us.ibm.com>.
2659 ****************************************************************************/
2661 static size_t merge_default_aces( SEC_ACE *nt_ace_list, size_t num_aces)
2665 for (i = 0; i < num_aces; i++) {
2666 for (j = i+1; j < num_aces; j++) {
2667 uint32 i_flags_ni = (nt_ace_list[i].flags & ~SEC_ACE_FLAG_INHERITED_ACE);
2668 uint32 j_flags_ni = (nt_ace_list[j].flags & ~SEC_ACE_FLAG_INHERITED_ACE);
2669 BOOL i_inh = (nt_ace_list[i].flags & SEC_ACE_FLAG_INHERITED_ACE) ? True : False;
2670 BOOL j_inh = (nt_ace_list[j].flags & SEC_ACE_FLAG_INHERITED_ACE) ? True : False;
2672 /* We know the lower number ACE's are file entries. */
2673 if ((nt_ace_list[i].type == nt_ace_list[j].type) &&
2674 (nt_ace_list[i].size == nt_ace_list[j].size) &&
2675 (nt_ace_list[i].access_mask == nt_ace_list[j].access_mask) &&
2676 sid_equal(&nt_ace_list[i].trustee, &nt_ace_list[j].trustee) &&
2678 (i_flags_ni == 0) &&
2679 (j_flags_ni == (SEC_ACE_FLAG_OBJECT_INHERIT|
2680 SEC_ACE_FLAG_CONTAINER_INHERIT|
2681 SEC_ACE_FLAG_INHERIT_ONLY))) {
2683 * W2K wants to have access allowed zero access ACE's
2684 * at the end of the list. If the mask is zero, merge
2685 * the non-inherited ACE onto the inherited ACE.
2688 if (nt_ace_list[i].access_mask == 0) {
2689 nt_ace_list[j].flags = SEC_ACE_FLAG_OBJECT_INHERIT|SEC_ACE_FLAG_CONTAINER_INHERIT|
2690 (i_inh ? SEC_ACE_FLAG_INHERITED_ACE : 0);
2691 if (num_aces - i - 1 > 0)
2692 memmove(&nt_ace_list[i], &nt_ace_list[i+1], (num_aces-i-1) *
2695 DEBUG(10,("merge_default_aces: Merging zero access ACE %u onto ACE %u.\n",
2696 (unsigned int)i, (unsigned int)j ));
2699 * These are identical except for the flags.
2700 * Merge the inherited ACE onto the non-inherited ACE.
2703 nt_ace_list[i].flags = SEC_ACE_FLAG_OBJECT_INHERIT|SEC_ACE_FLAG_CONTAINER_INHERIT|
2704 (i_inh ? SEC_ACE_FLAG_INHERITED_ACE : 0);
2705 if (num_aces - j - 1 > 0)
2706 memmove(&nt_ace_list[j], &nt_ace_list[j+1], (num_aces-j-1) *
2709 DEBUG(10,("merge_default_aces: Merging ACE %u onto ACE %u.\n",
2710 (unsigned int)j, (unsigned int)i ));
2720 /****************************************************************************
2721 Reply to query a security descriptor from an fsp. If it succeeds it allocates
2722 the space for the return elements and returns the size needed to return the
2723 security descriptor. This should be the only external function needed for
2724 the UNIX style get ACL.
2725 ****************************************************************************/
2727 size_t get_nt_acl(files_struct *fsp, uint32 security_info, SEC_DESC **ppdesc)
2729 connection_struct *conn = fsp->conn;
2730 SMB_STRUCT_STAT sbuf;
2731 SEC_ACE *nt_ace_list = NULL;
2735 SEC_ACL *psa = NULL;
2736 size_t num_acls = 0;
2737 size_t num_def_acls = 0;
2738 size_t num_aces = 0;
2739 SMB_ACL_T posix_acl = NULL;
2740 SMB_ACL_T def_acl = NULL;
2741 canon_ace *file_ace = NULL;
2742 canon_ace *dir_ace = NULL;
2743 size_t num_profile_acls = 0;
2744 struct pai_val *pal = NULL;
2745 SEC_DESC *psd = NULL;
2749 DEBUG(10,("get_nt_acl: called for file %s\n", fsp->fsp_name ));
2751 if(fsp->is_directory || fsp->fh->fd == -1) {
2753 /* Get the stat struct for the owner info. */
2754 if(SMB_VFS_STAT(fsp->conn,fsp->fsp_name, &sbuf) != 0) {
2758 * Get the ACL from the path.
2761 posix_acl = SMB_VFS_SYS_ACL_GET_FILE(conn, fsp->fsp_name, SMB_ACL_TYPE_ACCESS);
2764 * If it's a directory get the default POSIX ACL.
2767 if(fsp->is_directory) {
2768 def_acl = SMB_VFS_SYS_ACL_GET_FILE(conn, fsp->fsp_name, SMB_ACL_TYPE_DEFAULT);
2769 def_acl = free_empty_sys_acl(conn, def_acl);
2774 /* Get the stat struct for the owner info. */
2775 if(SMB_VFS_FSTAT(fsp,fsp->fh->fd,&sbuf) != 0) {
2779 * Get the ACL from the fd.
2781 posix_acl = SMB_VFS_SYS_ACL_GET_FD(fsp, fsp->fh->fd);
2784 DEBUG(5,("get_nt_acl : file ACL %s, directory ACL %s\n",
2785 posix_acl ? "present" : "absent",
2786 def_acl ? "present" : "absent" ));
2788 pal = load_inherited_info(fsp);
2791 * Get the owner, group and world SIDs.
2794 if (lp_profile_acls(SNUM(conn))) {
2795 /* For WXP SP1 the owner must be administrators. */
2796 sid_copy(&owner_sid, &global_sid_Builtin_Administrators);
2797 sid_copy(&group_sid, &global_sid_Builtin_Users);
2798 num_profile_acls = 2;
2800 create_file_sids(&sbuf, &owner_sid, &group_sid);
2803 if ((security_info & DACL_SECURITY_INFORMATION) && !(security_info & PROTECTED_DACL_SECURITY_INFORMATION)) {
2806 * In the optimum case Creator Owner and Creator Group would be used for
2807 * the ACL_USER_OBJ and ACL_GROUP_OBJ entries, respectively, but this
2808 * would lead to usability problems under Windows: The Creator entries
2809 * are only available in browse lists of directories and not for files;
2810 * additionally the identity of the owning group couldn't be determined.
2811 * We therefore use those identities only for Default ACLs.
2814 /* Create the canon_ace lists. */
2815 file_ace = canonicalise_acl( fsp, posix_acl, &sbuf, &owner_sid, &group_sid, pal, SMB_ACL_TYPE_ACCESS );
2817 /* We must have *some* ACLS. */
2819 if (count_canon_ace_list(file_ace) == 0) {
2820 DEBUG(0,("get_nt_acl : No ACLs on file (%s) !\n", fsp->fsp_name ));
2824 if (fsp->is_directory && def_acl) {
2825 dir_ace = canonicalise_acl(fsp, def_acl, &sbuf,
2826 &global_sid_Creator_Owner,
2827 &global_sid_Creator_Group, pal, SMB_ACL_TYPE_DEFAULT );
2831 * Create the NT ACE list from the canonical ace lists.
2839 if (nt4_compatible_acls() && dir_ace) {
2841 * NT 4 chokes if an ACL contains an INHERIT_ONLY entry
2842 * but no non-INHERIT_ONLY entry for one SID. So we only
2843 * remove entries from the Access ACL if the
2844 * corresponding Default ACL entries have also been
2845 * removed. ACEs for CREATOR-OWNER and CREATOR-GROUP
2846 * are exceptions. We can do nothing
2847 * intelligent if the Default ACL contains entries that
2848 * are not also contained in the Access ACL, so this
2849 * case will still fail under NT 4.
2852 ace = canon_ace_entry_for(dir_ace, SMB_ACL_OTHER, NULL);
2853 if (ace && !ace->perms) {
2854 DLIST_REMOVE(dir_ace, ace);
2857 ace = canon_ace_entry_for(file_ace, SMB_ACL_OTHER, NULL);
2858 if (ace && !ace->perms) {
2859 DLIST_REMOVE(file_ace, ace);
2865 * WinNT doesn't usually have Creator Group
2866 * in browse lists, so we send this entry to
2867 * WinNT even if it contains no relevant
2868 * permissions. Once we can add
2869 * Creator Group to browse lists we can
2874 ace = canon_ace_entry_for(dir_ace, SMB_ACL_GROUP_OBJ, NULL);
2875 if (ace && !ace->perms) {
2876 DLIST_REMOVE(dir_ace, ace);
2881 ace = canon_ace_entry_for(file_ace, SMB_ACL_GROUP_OBJ, NULL);
2882 if (ace && !ace->perms) {
2883 DLIST_REMOVE(file_ace, ace);
2888 num_acls = count_canon_ace_list(file_ace);
2889 num_def_acls = count_canon_ace_list(dir_ace);
2891 /* Allocate the ace list. */
2892 if ((nt_ace_list = SMB_MALLOC_ARRAY(SEC_ACE,num_acls + num_profile_acls + num_def_acls)) == NULL) {
2893 DEBUG(0,("get_nt_acl: Unable to malloc space for nt_ace_list.\n"));
2897 memset(nt_ace_list, '\0', (num_acls + num_def_acls) * sizeof(SEC_ACE) );
2900 * Create the NT ACE list from the canonical ace lists.
2905 for (i = 0; i < num_acls; i++, ace = ace->next) {
2908 acc = map_canon_ace_perms(SNUM(conn),
2912 init_sec_ace(&nt_ace_list[num_aces++],
2917 SEC_ACE_FLAG_INHERITED_ACE : 0);
2920 /* The User must have access to a profile share - even
2921 * if we can't map the SID. */
2922 if (lp_profile_acls(SNUM(conn))) {
2925 init_sec_access(&acc,FILE_GENERIC_ALL);
2926 init_sec_ace(&nt_ace_list[num_aces++],
2927 &global_sid_Builtin_Users,
2928 SEC_ACE_TYPE_ACCESS_ALLOWED,
2934 for (i = 0; i < num_def_acls; i++, ace = ace->next) {
2937 acc = map_canon_ace_perms(SNUM(conn),
2941 init_sec_ace(&nt_ace_list[num_aces++],
2945 SEC_ACE_FLAG_OBJECT_INHERIT|
2946 SEC_ACE_FLAG_CONTAINER_INHERIT|
2947 SEC_ACE_FLAG_INHERIT_ONLY|
2949 SEC_ACE_FLAG_INHERITED_ACE : 0));
2952 /* The User must have access to a profile share - even
2953 * if we can't map the SID. */
2954 if (lp_profile_acls(SNUM(conn))) {
2957 init_sec_access(&acc,FILE_GENERIC_ALL);
2958 init_sec_ace(&nt_ace_list[num_aces++], &global_sid_Builtin_Users, SEC_ACE_TYPE_ACCESS_ALLOWED, acc,
2959 SEC_ACE_FLAG_OBJECT_INHERIT|SEC_ACE_FLAG_CONTAINER_INHERIT|
2960 SEC_ACE_FLAG_INHERIT_ONLY|0);
2964 * Merge POSIX default ACLs and normal ACLs into one NT ACE.
2965 * Win2K needs this to get the inheritance correct when replacing ACLs
2966 * on a directory tree. Based on work by Jim @ IBM.
2969 num_aces = merge_default_aces(nt_ace_list, num_aces);
2974 if((psa = make_sec_acl( talloc_tos(), NT4_ACL_REVISION, num_aces, nt_ace_list)) == NULL) {
2975 DEBUG(0,("get_nt_acl: Unable to malloc space for acl.\n"));
2979 } /* security_info & DACL_SECURITY_INFORMATION */
2981 psd = make_standard_sec_desc( talloc_tos(),
2982 (security_info & OWNER_SECURITY_INFORMATION) ? &owner_sid : NULL,
2983 (security_info & GROUP_SECURITY_INFORMATION) ? &group_sid : NULL,
2988 DEBUG(0,("get_nt_acl: Unable to malloc space for security descriptor.\n"));
2994 * Windows 2000: The DACL_PROTECTED flag in the security
2995 * descriptor marks the ACL as non-inheriting, i.e., no
2996 * ACEs from higher level directories propagate to this
2997 * ACL. In the POSIX ACL model permissions are only
2998 * inherited at file create time, so ACLs never contain
2999 * any ACEs that are inherited dynamically. The DACL_PROTECTED
3000 * flag doesn't seem to bother Windows NT.
3001 * Always set this if map acl inherit is turned off.
3003 if (get_protected_flag(pal) || !lp_map_acl_inherit(SNUM(conn))) {
3004 psd->type |= SE_DESC_DACL_PROTECTED;
3008 dacl_sort_into_canonical_order(psd->dacl->aces, (unsigned int)psd->dacl->num_aces);
3016 SMB_VFS_SYS_ACL_FREE_ACL(conn, posix_acl);
3019 SMB_VFS_SYS_ACL_FREE_ACL(conn, def_acl);
3021 free_canon_ace_list(file_ace);
3022 free_canon_ace_list(dir_ace);
3023 free_inherited_info(pal);
3024 SAFE_FREE(nt_ace_list);
3029 /****************************************************************************
3030 Try to chown a file. We will be able to chown it under the following conditions.
3032 1) If we have root privileges, then it will just work.
3033 2) If we have SeTakeOwnershipPrivilege we can change the user to the current user.
3034 3) If we have SeRestorePrivilege we can change the user to any other user.
3035 4) If we have write permission to the file and dos_filemodes is set
3036 then allow chown to the currently authenticated user.
3037 ****************************************************************************/
3039 int try_chown(connection_struct *conn, const char *fname, uid_t uid, gid_t gid)
3045 if(!CAN_WRITE(conn)) {
3050 /* try the direct way first */
3051 ret = SMB_VFS_CHOWN(conn, fname, uid, gid);
3055 /* Case (2) / (3) */
3056 if (lp_enable_privileges()) {
3058 BOOL has_take_ownership_priv = user_has_privileges(current_user.nt_user_token,
3059 &se_take_ownership);
3060 BOOL has_restore_priv = user_has_privileges(current_user.nt_user_token,
3064 if ( ( has_take_ownership_priv && ( uid == current_user.ut.uid ) ) ||
3066 ( has_restore_priv ) ) {
3069 /* Keep the current file gid the same - take ownership doesn't imply group change. */
3070 ret = SMB_VFS_CHOWN(conn, fname, uid, (gid_t)-1);
3077 if (!lp_dos_filemode(SNUM(conn))) {
3082 if (SMB_VFS_STAT(conn,fname,&st)) {
3086 if (!NT_STATUS_IS_OK(open_file_fchmod(conn,fname,&st,&fsp))) {
3090 /* only allow chown to the current user. This is more secure,
3091 and also copes with the case where the SID in a take ownership ACL is
3092 a local SID on the users workstation
3094 uid = current_user.ut.uid;
3097 /* Keep the current file gid the same. */
3098 ret = SMB_VFS_FCHOWN(fsp, fsp->fh->fd, uid, (gid_t)-1);
3101 close_file_fchmod(fsp);
3106 static NTSTATUS append_ugw_ace(files_struct *fsp,
3107 SMB_STRUCT_STAT *psbuf,
3119 perms = unix_perms_to_acl_perms(unx_mode,
3123 uid_to_sid(&trustee, psbuf->st_uid );
3126 perms = unix_perms_to_acl_perms(unx_mode,
3130 gid_to_sid(&trustee, psbuf->st_gid );
3133 perms = unix_perms_to_acl_perms(unx_mode,
3137 sid_copy(&trustee, &global_sid_World);
3140 return NT_STATUS_INVALID_PARAMETER;
3142 acc = map_canon_ace_perms(SNUM(fsp->conn),
3152 return NT_STATUS_OK;
3155 /****************************************************************************
3157 ****************************************************************************/
3159 static NTSTATUS append_parent_acl(files_struct *fsp,
3160 SMB_STRUCT_STAT *psbuf,
3162 SEC_DESC **pp_new_sd)
3164 SEC_DESC *parent_sd = NULL;
3165 files_struct *parent_fsp = NULL;
3166 TALLOC_CTX *mem_ctx = talloc_parent(psd);
3167 char *parent_name = NULL;
3168 SEC_ACE *new_ace = NULL;
3169 unsigned int num_aces = psd->dacl->num_aces;
3170 SMB_STRUCT_STAT sbuf;
3179 if (mem_ctx == NULL) {
3180 return NT_STATUS_NO_MEMORY;
3183 if (!parent_dirname_talloc(mem_ctx,
3187 return NT_STATUS_NO_MEMORY;
3190 /* Create a default mode for u/g/w. */
3191 unx_mode = unix_mode(fsp->conn,
3192 aARCH | (fsp->is_directory ? aDIR : 0),
3196 status = open_directory(fsp->conn,
3200 FILE_READ_ATTRIBUTES, /* Just a stat open */
3201 FILE_SHARE_NONE, /* Ignored for stat opens */
3208 if (!NT_STATUS_IS_OK(status)) {
3212 sd_size = SMB_VFS_GET_NT_ACL(parent_fsp, parent_fsp->fsp_name,
3213 DACL_SECURITY_INFORMATION, &parent_sd );
3215 close_file(parent_fsp, NORMAL_CLOSE);
3218 return NT_STATUS_ACCESS_DENIED;
3222 * Make room for potentially all the ACLs from
3223 * the parent, plus the user/group/other triple.
3226 num_aces += parent_sd->dacl->num_aces + 3;
3228 if((new_ace = TALLOC_ZERO_ARRAY(mem_ctx, SEC_ACE,
3229 num_aces)) == NULL) {
3230 return NT_STATUS_NO_MEMORY;
3233 DEBUG(10,("append_parent_acl: parent ACL has %u entries. New "
3234 "ACL has %u entries\n",
3235 parent_sd->dacl->num_aces, num_aces ));
3237 /* Start by copying in all the given ACE entries. */
3238 for (i = 0; i < psd->dacl->num_aces; i++) {
3239 sec_ace_copy(&new_ace[i], &psd->dacl->aces[i]);
3243 * Note that we're ignoring "inherit permissions" here
3244 * as that really only applies to newly created files. JRA.
3251 status = append_ugw_ace(fsp, psbuf, unx_mode, S_IRUSR, &new_ace[i++]);
3252 if (!NT_STATUS_IS_OK(status)) {
3255 status = append_ugw_ace(fsp, psbuf, unx_mode, S_IRGRP, &new_ace[i++]);
3256 if (!NT_STATUS_IS_OK(status)) {
3259 status = append_ugw_ace(fsp, psbuf, unx_mode, S_IROTH, &new_ace[i++]);
3260 if (!NT_STATUS_IS_OK(status)) {
3264 /* Finally append any inherited ACEs. */
3265 for (j = 0; j < parent_sd->dacl->num_aces; j++) {
3266 SEC_ACE *se = &parent_sd->dacl->aces[j];
3267 uint32 i_flags = se->flags & (SEC_ACE_FLAG_OBJECT_INHERIT|
3268 SEC_ACE_FLAG_CONTAINER_INHERIT|
3269 SEC_ACE_FLAG_INHERIT_ONLY);
3271 if (fsp->is_directory) {
3272 if (i_flags == SEC_ACE_FLAG_OBJECT_INHERIT) {
3273 /* Should only apply to a file - ignore. */
3277 if ((i_flags & (SEC_ACE_FLAG_OBJECT_INHERIT|
3278 SEC_ACE_FLAG_INHERIT_ONLY)) !=
3279 SEC_ACE_FLAG_OBJECT_INHERIT) {
3280 /* Should not apply to a file - ignore. */
3284 sec_ace_copy(&new_ace[i], se);
3285 if (se->flags & SEC_ACE_FLAG_NO_PROPAGATE_INHERIT) {
3286 new_ace[i].flags &= ~(SEC_ACE_FLAG_VALID_INHERIT);
3288 new_ace[i].flags |= SEC_ACE_FLAG_INHERITED_ACE;
3292 parent_sd->dacl->aces = new_ace;
3293 parent_sd->dacl->num_aces = i;
3295 *pp_new_sd = parent_sd;
3299 /****************************************************************************
3300 Reply to set a security descriptor on an fsp. security_info_sent is the
3301 description of the following NT ACL.
3302 This should be the only external function needed for the UNIX style set ACL.
3303 ****************************************************************************/
3305 NTSTATUS set_nt_acl(files_struct *fsp, uint32 security_info_sent, SEC_DESC *psd)
3307 connection_struct *conn = fsp->conn;
3308 uid_t user = (uid_t)-1;
3309 gid_t grp = (gid_t)-1;
3310 SMB_STRUCT_STAT sbuf;
3311 DOM_SID file_owner_sid;
3312 DOM_SID file_grp_sid;
3313 canon_ace *file_ace_list = NULL;
3314 canon_ace *dir_ace_list = NULL;
3315 BOOL acl_perms = False;
3316 mode_t orig_mode = (mode_t)0;
3319 DEBUG(10,("set_nt_acl: called for file %s\n", fsp->fsp_name ));
3321 if (!CAN_WRITE(conn)) {
3322 DEBUG(10,("set acl rejected on read-only share\n"));
3323 return NT_STATUS_MEDIA_WRITE_PROTECTED;
3327 * Get the current state of the file.
3330 if(fsp->is_directory || fsp->fh->fd == -1) {
3331 if(SMB_VFS_STAT(fsp->conn,fsp->fsp_name, &sbuf) != 0)
3332 return map_nt_error_from_unix(errno);
3334 if(SMB_VFS_FSTAT(fsp,fsp->fh->fd,&sbuf) != 0)
3335 return map_nt_error_from_unix(errno);
3338 /* Save the original elements we check against. */
3339 orig_mode = sbuf.st_mode;
3342 * Unpack the user/group/world id's.
3345 status = unpack_nt_owners( SNUM(conn), &user, &grp, security_info_sent, psd);
3346 if (!NT_STATUS_IS_OK(status)) {
3351 * Do we need to chown ?
3354 if (((user != (uid_t)-1) && (sbuf.st_uid != user)) || (( grp != (gid_t)-1) && (sbuf.st_gid != grp))) {
3356 DEBUG(3,("set_nt_acl: chown %s. uid = %u, gid = %u.\n",
3357 fsp->fsp_name, (unsigned int)user, (unsigned int)grp ));
3359 if(try_chown( fsp->conn, fsp->fsp_name, user, grp) == -1) {
3360 DEBUG(3,("set_nt_acl: chown %s, %u, %u failed. Error = %s.\n",
3361 fsp->fsp_name, (unsigned int)user, (unsigned int)grp, strerror(errno) ));
3362 if (errno == EPERM) {
3363 return NT_STATUS_INVALID_OWNER;
3365 return map_nt_error_from_unix(errno);
3369 * Recheck the current state of the file, which may have changed.
3370 * (suid/sgid bits, for instance)
3373 if(fsp->is_directory) {
3374 if(SMB_VFS_STAT(fsp->conn, fsp->fsp_name, &sbuf) != 0) {
3375 return map_nt_error_from_unix(errno);
3381 if(fsp->fh->fd == -1)
3382 ret = SMB_VFS_STAT(fsp->conn, fsp->fsp_name, &sbuf);
3384 ret = SMB_VFS_FSTAT(fsp,fsp->fh->fd,&sbuf);
3387 return map_nt_error_from_unix(errno);
3390 /* Save the original elements we check against. */
3391 orig_mode = sbuf.st_mode;
3394 create_file_sids(&sbuf, &file_owner_sid, &file_grp_sid);
3396 if ((security_info_sent & DACL_SECURITY_INFORMATION) &&
3397 psd->dacl != NULL &&
3398 (psd->type & (SE_DESC_DACL_AUTO_INHERITED|
3399 SE_DESC_DACL_AUTO_INHERIT_REQ))==
3400 (SE_DESC_DACL_AUTO_INHERITED|
3401 SE_DESC_DACL_AUTO_INHERIT_REQ) ) {
3402 status = append_parent_acl(fsp, &sbuf, psd, &psd);
3403 if (!NT_STATUS_IS_OK(status)) {
3408 acl_perms = unpack_canon_ace( fsp, &sbuf, &file_owner_sid, &file_grp_sid,
3409 &file_ace_list, &dir_ace_list, security_info_sent, psd);
3411 /* Ignore W2K traverse DACL set. */
3412 if (file_ace_list || dir_ace_list) {
3415 DEBUG(3,("set_nt_acl: cannot set permissions\n"));
3416 free_canon_ace_list(file_ace_list);
3417 free_canon_ace_list(dir_ace_list);
3418 return NT_STATUS_ACCESS_DENIED;
3422 * Only change security if we got a DACL.
3425 if((security_info_sent & DACL_SECURITY_INFORMATION) && (psd->dacl != NULL)) {
3427 BOOL acl_set_support = False;
3431 * Try using the POSIX ACL set first. Fall back to chmod if
3432 * we have no ACL support on this filesystem.
3435 if (acl_perms && file_ace_list) {
3436 ret = set_canon_ace_list(fsp, file_ace_list, False, sbuf.st_gid, &acl_set_support);
3437 if (acl_set_support && ret == False) {
3438 DEBUG(3,("set_nt_acl: failed to set file acl on file %s (%s).\n", fsp->fsp_name, strerror(errno) ));
3439 free_canon_ace_list(file_ace_list);
3440 free_canon_ace_list(dir_ace_list);
3441 return map_nt_error_from_unix(errno);
3445 if (acl_perms && acl_set_support && fsp->is_directory) {
3447 if (!set_canon_ace_list(fsp, dir_ace_list, True, sbuf.st_gid, &acl_set_support)) {
3448 DEBUG(3,("set_nt_acl: failed to set default acl on directory %s (%s).\n", fsp->fsp_name, strerror(errno) ));
3449 free_canon_ace_list(file_ace_list);
3450 free_canon_ace_list(dir_ace_list);
3451 return map_nt_error_from_unix(errno);
3456 * No default ACL - delete one if it exists.
3459 if (SMB_VFS_SYS_ACL_DELETE_DEF_FILE(conn, fsp->fsp_name) == -1) {
3462 if (acl_group_override(conn, sbuf.st_gid)) {
3463 DEBUG(5,("set_nt_acl: acl group control on and "
3464 "current user in file %s primary group. Override delete_def_acl\n",
3468 sret = SMB_VFS_SYS_ACL_DELETE_DEF_FILE(conn, fsp->fsp_name);
3473 DEBUG(3,("set_nt_acl: sys_acl_delete_def_file failed (%s)\n", strerror(errno)));
3474 free_canon_ace_list(file_ace_list);
3475 free_canon_ace_list(dir_ace_list);
3476 return map_nt_error_from_unix(errno);
3482 if (acl_set_support) {
3483 store_inheritance_attributes(fsp, file_ace_list, dir_ace_list,
3484 (psd->type & SE_DESC_DACL_PROTECTED) ? True : False);
3488 * If we cannot set using POSIX ACLs we fall back to checking if we need to chmod.
3491 if(!acl_set_support && acl_perms) {
3494 if (!convert_canon_ace_to_posix_perms( fsp, file_ace_list, &posix_perms)) {
3495 free_canon_ace_list(file_ace_list);
3496 free_canon_ace_list(dir_ace_list);
3497 DEBUG(3,("set_nt_acl: failed to convert file acl to posix permissions for file %s.\n",
3499 return NT_STATUS_ACCESS_DENIED;
3502 if (orig_mode != posix_perms) {
3504 DEBUG(3,("set_nt_acl: chmod %s. perms = 0%o.\n",
3505 fsp->fsp_name, (unsigned int)posix_perms ));
3507 if(SMB_VFS_CHMOD(conn,fsp->fsp_name, posix_perms) == -1) {
3509 if (acl_group_override(conn, sbuf.st_gid)) {
3510 DEBUG(5,("set_nt_acl: acl group control on and "
3511 "current user in file %s primary group. Override chmod\n",
3515 sret = SMB_VFS_CHMOD(conn,fsp->fsp_name, posix_perms);
3520 DEBUG(3,("set_nt_acl: chmod %s, 0%o failed. Error = %s.\n",
3521 fsp->fsp_name, (unsigned int)posix_perms, strerror(errno) ));
3522 free_canon_ace_list(file_ace_list);
3523 free_canon_ace_list(dir_ace_list);
3524 return map_nt_error_from_unix(errno);
3531 free_canon_ace_list(file_ace_list);
3532 free_canon_ace_list(dir_ace_list);
3535 return NT_STATUS_OK;
3538 /****************************************************************************
3539 Get the actual group bits stored on a file with an ACL. Has no effect if
3540 the file has no ACL. Needed in dosmode code where the stat() will return
3541 the mask bits, not the real group bits, for a file with an ACL.
3542 ****************************************************************************/
3544 int get_acl_group_bits( connection_struct *conn, const char *fname, mode_t *mode )
3546 int entry_id = SMB_ACL_FIRST_ENTRY;
3547 SMB_ACL_ENTRY_T entry;
3548 SMB_ACL_T posix_acl;
3551 posix_acl = SMB_VFS_SYS_ACL_GET_FILE(conn, fname, SMB_ACL_TYPE_ACCESS);
3552 if (posix_acl == (SMB_ACL_T)NULL)
3555 while (SMB_VFS_SYS_ACL_GET_ENTRY(conn, posix_acl, entry_id, &entry) == 1) {
3556 SMB_ACL_TAG_T tagtype;
3557 SMB_ACL_PERMSET_T permset;
3560 if (entry_id == SMB_ACL_FIRST_ENTRY)
3561 entry_id = SMB_ACL_NEXT_ENTRY;
3563 if (SMB_VFS_SYS_ACL_GET_TAG_TYPE(conn, entry, &tagtype) ==-1)
3566 if (tagtype == SMB_ACL_GROUP_OBJ) {
3567 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, entry, &permset) == -1) {
3570 *mode &= ~(S_IRGRP|S_IWGRP|S_IXGRP);
3571 *mode |= (SMB_VFS_SYS_ACL_GET_PERM(conn, permset, SMB_ACL_READ) ? S_IRGRP : 0);
3572 *mode |= (SMB_VFS_SYS_ACL_GET_PERM(conn, permset, SMB_ACL_WRITE) ? S_IWGRP : 0);
3573 *mode |= (SMB_VFS_SYS_ACL_GET_PERM(conn, permset, SMB_ACL_EXECUTE) ? S_IXGRP : 0);
3579 SMB_VFS_SYS_ACL_FREE_ACL(conn, posix_acl);
3583 /****************************************************************************
3584 Do a chmod by setting the ACL USER_OBJ, GROUP_OBJ and OTHER bits in an ACL
3585 and set the mask to rwx. Needed to preserve complex ACLs set by NT.
3586 ****************************************************************************/
3588 static int chmod_acl_internals( connection_struct *conn, SMB_ACL_T posix_acl, mode_t mode)
3590 int entry_id = SMB_ACL_FIRST_ENTRY;
3591 SMB_ACL_ENTRY_T entry;
3592 int num_entries = 0;
3594 while ( SMB_VFS_SYS_ACL_GET_ENTRY(conn, posix_acl, entry_id, &entry) == 1) {
3595 SMB_ACL_TAG_T tagtype;
3596 SMB_ACL_PERMSET_T permset;
3600 if (entry_id == SMB_ACL_FIRST_ENTRY)
3601 entry_id = SMB_ACL_NEXT_ENTRY;
3603 if (SMB_VFS_SYS_ACL_GET_TAG_TYPE(conn, entry, &tagtype) == -1)
3606 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, entry, &permset) == -1)
3612 case SMB_ACL_USER_OBJ:
3613 perms = unix_perms_to_acl_perms(mode, S_IRUSR, S_IWUSR, S_IXUSR);
3615 case SMB_ACL_GROUP_OBJ:
3616 perms = unix_perms_to_acl_perms(mode, S_IRGRP, S_IWGRP, S_IXGRP);
3620 * FIXME: The ACL_MASK entry permissions should really be set to
3621 * the union of the permissions of all ACL_USER,
3622 * ACL_GROUP_OBJ, and ACL_GROUP entries. That's what
3623 * acl_calc_mask() does, but Samba ACLs doesn't provide it.
3625 perms = S_IRUSR|S_IWUSR|S_IXUSR;
3628 perms = unix_perms_to_acl_perms(mode, S_IROTH, S_IWOTH, S_IXOTH);
3634 if (map_acl_perms_to_permset(conn, perms, &permset) == -1)
3637 if (SMB_VFS_SYS_ACL_SET_PERMSET(conn, entry, permset) == -1)
3642 * If this is a simple 3 element ACL or no elements then it's a standard
3643 * UNIX permission set. Just use chmod...
3646 if ((num_entries == 3) || (num_entries == 0))
3652 /****************************************************************************
3653 Get the access ACL of FROM, do a chmod by setting the ACL USER_OBJ,
3654 GROUP_OBJ and OTHER bits in an ACL and set the mask to rwx. Set the
3655 resulting ACL on TO. Note that name is in UNIX character set.
3656 ****************************************************************************/
3658 static int copy_access_acl(connection_struct *conn, const char *from, const char *to, mode_t mode)
3660 SMB_ACL_T posix_acl = NULL;
3663 if ((posix_acl = SMB_VFS_SYS_ACL_GET_FILE(conn, from, SMB_ACL_TYPE_ACCESS)) == NULL)
3666 if ((ret = chmod_acl_internals(conn, posix_acl, mode)) == -1)
3669 ret = SMB_VFS_SYS_ACL_SET_FILE(conn, to, SMB_ACL_TYPE_ACCESS, posix_acl);
3673 SMB_VFS_SYS_ACL_FREE_ACL(conn, posix_acl);
3677 /****************************************************************************
3678 Do a chmod by setting the ACL USER_OBJ, GROUP_OBJ and OTHER bits in an ACL
3679 and set the mask to rwx. Needed to preserve complex ACLs set by NT.
3680 Note that name is in UNIX character set.
3681 ****************************************************************************/
3683 int chmod_acl(connection_struct *conn, const char *name, mode_t mode)
3685 return copy_access_acl(conn, name, name, mode);
3688 /****************************************************************************
3689 If the parent directory has no default ACL but it does have an Access ACL,
3690 inherit this Access ACL to file name.
3691 ****************************************************************************/
3693 int inherit_access_acl(connection_struct *conn, const char *inherit_from_dir,
3694 const char *name, mode_t mode)
3696 if (directory_has_default_acl(conn, inherit_from_dir))
3699 return copy_access_acl(conn, inherit_from_dir, name, mode);
3702 /****************************************************************************
3703 Do an fchmod by setting the ACL USER_OBJ, GROUP_OBJ and OTHER bits in an ACL
3704 and set the mask to rwx. Needed to preserve complex ACLs set by NT.
3705 ****************************************************************************/
3707 int fchmod_acl(files_struct *fsp, int fd, mode_t mode)
3709 connection_struct *conn = fsp->conn;
3710 SMB_ACL_T posix_acl = NULL;
3713 if ((posix_acl = SMB_VFS_SYS_ACL_GET_FD(fsp, fd)) == NULL)
3716 if ((ret = chmod_acl_internals(conn, posix_acl, mode)) == -1)
3719 ret = SMB_VFS_SYS_ACL_SET_FD(fsp, fd, posix_acl);
3723 SMB_VFS_SYS_ACL_FREE_ACL(conn, posix_acl);
3727 /****************************************************************************
3728 Check for an existing default POSIX ACL on a directory.
3729 ****************************************************************************/
3731 BOOL directory_has_default_acl(connection_struct *conn, const char *fname)
3733 SMB_ACL_T def_acl = SMB_VFS_SYS_ACL_GET_FILE( conn, fname, SMB_ACL_TYPE_DEFAULT);
3734 BOOL has_acl = False;
3735 SMB_ACL_ENTRY_T entry;
3737 if (def_acl != NULL && (SMB_VFS_SYS_ACL_GET_ENTRY(conn, def_acl, SMB_ACL_FIRST_ENTRY, &entry) == 1)) {
3742 SMB_VFS_SYS_ACL_FREE_ACL(conn, def_acl);
3747 /****************************************************************************
3748 Map from wire type to permset.
3749 ****************************************************************************/
3751 static BOOL unix_ex_wire_to_permset(connection_struct *conn, unsigned char wire_perm, SMB_ACL_PERMSET_T *p_permset)
3753 if (wire_perm & ~(SMB_POSIX_ACL_READ|SMB_POSIX_ACL_WRITE|SMB_POSIX_ACL_EXECUTE)) {
3757 if (SMB_VFS_SYS_ACL_CLEAR_PERMS(conn, *p_permset) == -1) {
3761 if (wire_perm & SMB_POSIX_ACL_READ) {
3762 if (SMB_VFS_SYS_ACL_ADD_PERM(conn, *p_permset, SMB_ACL_READ) == -1) {
3766 if (wire_perm & SMB_POSIX_ACL_WRITE) {
3767 if (SMB_VFS_SYS_ACL_ADD_PERM(conn, *p_permset, SMB_ACL_WRITE) == -1) {
3771 if (wire_perm & SMB_POSIX_ACL_EXECUTE) {
3772 if (SMB_VFS_SYS_ACL_ADD_PERM(conn, *p_permset, SMB_ACL_EXECUTE) == -1) {
3779 /****************************************************************************
3780 Map from wire type to tagtype.
3781 ****************************************************************************/
3783 static BOOL unix_ex_wire_to_tagtype(unsigned char wire_tt, SMB_ACL_TAG_T *p_tt)
3786 case SMB_POSIX_ACL_USER_OBJ:
3787 *p_tt = SMB_ACL_USER_OBJ;
3789 case SMB_POSIX_ACL_USER:
3790 *p_tt = SMB_ACL_USER;
3792 case SMB_POSIX_ACL_GROUP_OBJ:
3793 *p_tt = SMB_ACL_GROUP_OBJ;
3795 case SMB_POSIX_ACL_GROUP:
3796 *p_tt = SMB_ACL_GROUP;
3798 case SMB_POSIX_ACL_MASK:
3799 *p_tt = SMB_ACL_MASK;
3801 case SMB_POSIX_ACL_OTHER:
3802 *p_tt = SMB_ACL_OTHER;
3810 /****************************************************************************
3811 Create a new POSIX acl from wire permissions.
3812 FIXME ! How does the share mask/mode fit into this.... ?
3813 ****************************************************************************/
3815 static SMB_ACL_T create_posix_acl_from_wire(connection_struct *conn, uint16 num_acls, const char *pdata)
3818 SMB_ACL_T the_acl = SMB_VFS_SYS_ACL_INIT(conn, num_acls);
3820 if (the_acl == NULL) {
3824 for (i = 0; i < num_acls; i++) {
3825 SMB_ACL_ENTRY_T the_entry;
3826 SMB_ACL_PERMSET_T the_permset;
3827 SMB_ACL_TAG_T tag_type;
3829 if (SMB_VFS_SYS_ACL_CREATE_ENTRY(conn, &the_acl, &the_entry) == -1) {
3830 DEBUG(0,("create_posix_acl_from_wire: Failed to create entry %u. (%s)\n",
3831 i, strerror(errno) ));
3835 if (!unix_ex_wire_to_tagtype(CVAL(pdata,(i*SMB_POSIX_ACL_ENTRY_SIZE)), &tag_type)) {
3836 DEBUG(0,("create_posix_acl_from_wire: invalid wire tagtype %u on entry %u.\n",
3837 CVAL(pdata,(i*SMB_POSIX_ACL_ENTRY_SIZE)), i ));
3841 if (SMB_VFS_SYS_ACL_SET_TAG_TYPE(conn, the_entry, tag_type) == -1) {
3842 DEBUG(0,("create_posix_acl_from_wire: Failed to set tagtype on entry %u. (%s)\n",
3843 i, strerror(errno) ));
3847 /* Get the permset pointer from the new ACL entry. */
3848 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, the_entry, &the_permset) == -1) {
3849 DEBUG(0,("create_posix_acl_from_wire: Failed to get permset on entry %u. (%s)\n",
3850 i, strerror(errno) ));
3854 /* Map from wire to permissions. */
3855 if (!unix_ex_wire_to_permset(conn, CVAL(pdata,(i*SMB_POSIX_ACL_ENTRY_SIZE)+1), &the_permset)) {
3856 DEBUG(0,("create_posix_acl_from_wire: invalid permset %u on entry %u.\n",
3857 CVAL(pdata,(i*SMB_POSIX_ACL_ENTRY_SIZE) + 1), i ));
3861 /* Now apply to the new ACL entry. */
3862 if (SMB_VFS_SYS_ACL_SET_PERMSET(conn, the_entry, the_permset) == -1) {
3863 DEBUG(0,("create_posix_acl_from_wire: Failed to add permset on entry %u. (%s)\n",
3864 i, strerror(errno) ));
3868 if (tag_type == SMB_ACL_USER) {
3869 uint32 uidval = IVAL(pdata,(i*SMB_POSIX_ACL_ENTRY_SIZE)+2);
3870 uid_t uid = (uid_t)uidval;
3871 if (SMB_VFS_SYS_ACL_SET_QUALIFIER(conn, the_entry,(void *)&uid) == -1) {
3872 DEBUG(0,("create_posix_acl_from_wire: Failed to set uid %u on entry %u. (%s)\n",
3873 (unsigned int)uid, i, strerror(errno) ));
3878 if (tag_type == SMB_ACL_GROUP) {
3879 uint32 gidval = IVAL(pdata,(i*SMB_POSIX_ACL_ENTRY_SIZE)+2);
3880 gid_t gid = (uid_t)gidval;
3881 if (SMB_VFS_SYS_ACL_SET_QUALIFIER(conn, the_entry,(void *)&gid) == -1) {
3882 DEBUG(0,("create_posix_acl_from_wire: Failed to set gid %u on entry %u. (%s)\n",
3883 (unsigned int)gid, i, strerror(errno) ));
3893 if (the_acl != NULL) {
3894 SMB_VFS_SYS_ACL_FREE_ACL(conn, the_acl);
3899 /****************************************************************************
3900 Calls from UNIX extensions - Default POSIX ACL set.
3901 If num_def_acls == 0 and not a directory just return. If it is a directory
3902 and num_def_acls == 0 then remove the default acl. Else set the default acl
3904 ****************************************************************************/
3906 BOOL set_unix_posix_default_acl(connection_struct *conn, const char *fname, SMB_STRUCT_STAT *psbuf,
3907 uint16 num_def_acls, const char *pdata)
3909 SMB_ACL_T def_acl = NULL;
3911 if (num_def_acls && !S_ISDIR(psbuf->st_mode)) {
3912 DEBUG(5,("set_unix_posix_default_acl: Can't set default ACL on non-directory file %s\n", fname ));
3917 if (!num_def_acls) {
3918 /* Remove the default ACL. */
3919 if (SMB_VFS_SYS_ACL_DELETE_DEF_FILE(conn, fname) == -1) {
3920 DEBUG(5,("set_unix_posix_default_acl: acl_delete_def_file failed on directory %s (%s)\n",
3921 fname, strerror(errno) ));
3927 if ((def_acl = create_posix_acl_from_wire(conn, num_def_acls, pdata)) == NULL) {
3931 if (SMB_VFS_SYS_ACL_SET_FILE(conn, fname, SMB_ACL_TYPE_DEFAULT, def_acl) == -1) {
3932 DEBUG(5,("set_unix_posix_default_acl: acl_set_file failed on directory %s (%s)\n",
3933 fname, strerror(errno) ));
3934 SMB_VFS_SYS_ACL_FREE_ACL(conn, def_acl);
3938 DEBUG(10,("set_unix_posix_default_acl: set default acl for file %s\n", fname ));
3939 SMB_VFS_SYS_ACL_FREE_ACL(conn, def_acl);
3943 /****************************************************************************
3944 Remove an ACL from a file. As we don't have acl_delete_entry() available
3945 we must read the current acl and copy all entries except MASK, USER and GROUP
3946 to a new acl, then set that. This (at least on Linux) causes any ACL to be
3948 FIXME ! How does the share mask/mode fit into this.... ?
3949 ****************************************************************************/
3951 static BOOL remove_posix_acl(connection_struct *conn, files_struct *fsp, const char *fname)
3953 SMB_ACL_T file_acl = NULL;
3954 int entry_id = SMB_ACL_FIRST_ENTRY;
3955 SMB_ACL_ENTRY_T entry;
3957 /* Create a new ACL with only 3 entries, u/g/w. */
3958 SMB_ACL_T new_file_acl = SMB_VFS_SYS_ACL_INIT(conn, 3);
3959 SMB_ACL_ENTRY_T user_ent = NULL;
3960 SMB_ACL_ENTRY_T group_ent = NULL;
3961 SMB_ACL_ENTRY_T other_ent = NULL;
3963 if (new_file_acl == NULL) {
3964 DEBUG(5,("remove_posix_acl: failed to init new ACL with 3 entries for file %s.\n", fname));
3968 /* Now create the u/g/w entries. */
3969 if (SMB_VFS_SYS_ACL_CREATE_ENTRY(conn, &new_file_acl, &user_ent) == -1) {
3970 DEBUG(5,("remove_posix_acl: Failed to create user entry for file %s. (%s)\n",
3971 fname, strerror(errno) ));
3974 if (SMB_VFS_SYS_ACL_SET_TAG_TYPE(conn, user_ent, SMB_ACL_USER_OBJ) == -1) {
3975 DEBUG(5,("remove_posix_acl: Failed to set user entry for file %s. (%s)\n",
3976 fname, strerror(errno) ));
3980 if (SMB_VFS_SYS_ACL_CREATE_ENTRY(conn, &new_file_acl, &group_ent) == -1) {
3981 DEBUG(5,("remove_posix_acl: Failed to create group entry for file %s. (%s)\n",
3982 fname, strerror(errno) ));
3985 if (SMB_VFS_SYS_ACL_SET_TAG_TYPE(conn, group_ent, SMB_ACL_GROUP_OBJ) == -1) {
3986 DEBUG(5,("remove_posix_acl: Failed to set group entry for file %s. (%s)\n",
3987 fname, strerror(errno) ));
3991 if (SMB_VFS_SYS_ACL_CREATE_ENTRY(conn, &new_file_acl, &other_ent) == -1) {
3992 DEBUG(5,("remove_posix_acl: Failed to create other entry for file %s. (%s)\n",
3993 fname, strerror(errno) ));
3996 if (SMB_VFS_SYS_ACL_SET_TAG_TYPE(conn, other_ent, SMB_ACL_OTHER) == -1) {
3997 DEBUG(5,("remove_posix_acl: Failed to set other entry for file %s. (%s)\n",
3998 fname, strerror(errno) ));
4002 /* Get the current file ACL. */
4003 if (fsp && fsp->fh->fd != -1) {
4004 file_acl = SMB_VFS_SYS_ACL_GET_FD(fsp, fsp->fh->fd);
4006 file_acl = SMB_VFS_SYS_ACL_GET_FILE( conn, fname, SMB_ACL_TYPE_ACCESS);
4009 if (file_acl == NULL) {
4010 /* This is only returned if an error occurred. Even for a file with
4011 no acl a u/g/w acl should be returned. */
4012 DEBUG(5,("remove_posix_acl: failed to get ACL from file %s (%s).\n",
4013 fname, strerror(errno) ));
4017 while ( SMB_VFS_SYS_ACL_GET_ENTRY(conn, file_acl, entry_id, &entry) == 1) {
4018 SMB_ACL_TAG_T tagtype;
4019 SMB_ACL_PERMSET_T permset;
4022 if (entry_id == SMB_ACL_FIRST_ENTRY)
4023 entry_id = SMB_ACL_NEXT_ENTRY;
4025 if (SMB_VFS_SYS_ACL_GET_TAG_TYPE(conn, entry, &tagtype) == -1) {
4026 DEBUG(5,("remove_posix_acl: failed to get tagtype from ACL on file %s (%s).\n",
4027 fname, strerror(errno) ));
4031 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, entry, &permset) == -1) {
4032 DEBUG(5,("remove_posix_acl: failed to get permset from ACL on file %s (%s).\n",
4033 fname, strerror(errno) ));
4037 if (tagtype == SMB_ACL_USER_OBJ) {
4038 if (SMB_VFS_SYS_ACL_SET_PERMSET(conn, user_ent, permset) == -1) {
4039 DEBUG(5,("remove_posix_acl: failed to set permset from ACL on file %s (%s).\n",
4040 fname, strerror(errno) ));
4042 } else if (tagtype == SMB_ACL_GROUP_OBJ) {
4043 if (SMB_VFS_SYS_ACL_SET_PERMSET(conn, group_ent, permset) == -1) {
4044 DEBUG(5,("remove_posix_acl: failed to set permset from ACL on file %s (%s).\n",
4045 fname, strerror(errno) ));
4047 } else if (tagtype == SMB_ACL_OTHER) {
4048 if (SMB_VFS_SYS_ACL_SET_PERMSET(conn, other_ent, permset) == -1) {
4049 DEBUG(5,("remove_posix_acl: failed to set permset from ACL on file %s (%s).\n",
4050 fname, strerror(errno) ));
4055 /* Set the new empty file ACL. */
4056 if (fsp && fsp->fh->fd != -1) {
4057 if (SMB_VFS_SYS_ACL_SET_FD(fsp, fsp->fh->fd, new_file_acl) == -1) {
4058 DEBUG(5,("remove_posix_acl: acl_set_file failed on %s (%s)\n",
4059 fname, strerror(errno) ));
4063 if (SMB_VFS_SYS_ACL_SET_FILE(conn, fname, SMB_ACL_TYPE_ACCESS, new_file_acl) == -1) {
4064 DEBUG(5,("remove_posix_acl: acl_set_file failed on %s (%s)\n",
4065 fname, strerror(errno) ));
4075 SMB_VFS_SYS_ACL_FREE_ACL(conn, file_acl);
4078 SMB_VFS_SYS_ACL_FREE_ACL(conn, new_file_acl);
4083 /****************************************************************************
4084 Calls from UNIX extensions - POSIX ACL set.
4085 If num_def_acls == 0 then read/modify/write acl after removing all entries
4086 except SMB_ACL_USER_OBJ, SMB_ACL_GROUP_OBJ, SMB_ACL_OTHER.
4087 ****************************************************************************/
4089 BOOL set_unix_posix_acl(connection_struct *conn, files_struct *fsp, const char *fname, uint16 num_acls, const char *pdata)
4091 SMB_ACL_T file_acl = NULL;
4094 /* Remove the ACL from the file. */
4095 return remove_posix_acl(conn, fsp, fname);
4098 if ((file_acl = create_posix_acl_from_wire(conn, num_acls, pdata)) == NULL) {
4102 if (fsp && fsp->fh->fd != -1) {
4103 /* The preferred way - use an open fd. */
4104 if (SMB_VFS_SYS_ACL_SET_FD(fsp, fsp->fh->fd, file_acl) == -1) {
4105 DEBUG(5,("set_unix_posix_acl: acl_set_file failed on %s (%s)\n",
4106 fname, strerror(errno) ));
4107 SMB_VFS_SYS_ACL_FREE_ACL(conn, file_acl);
4111 if (SMB_VFS_SYS_ACL_SET_FILE(conn, fname, SMB_ACL_TYPE_ACCESS, file_acl) == -1) {
4112 DEBUG(5,("set_unix_posix_acl: acl_set_file failed on %s (%s)\n",
4113 fname, strerror(errno) ));
4114 SMB_VFS_SYS_ACL_FREE_ACL(conn, file_acl);
4119 DEBUG(10,("set_unix_posix_acl: set acl for file %s\n", fname ));
4120 SMB_VFS_SYS_ACL_FREE_ACL(conn, file_acl);
4124 /****************************************************************************
4125 Check for POSIX group ACLs. If none use stat entry.
4126 Return -1 if no match, 0 if match and denied, 1 if match and allowed.
4127 ****************************************************************************/
4129 static int check_posix_acl_group_access(connection_struct *conn, const char *fname, SMB_STRUCT_STAT *psbuf, uint32 access_mask)
4131 SMB_ACL_T posix_acl = NULL;
4132 int entry_id = SMB_ACL_FIRST_ENTRY;
4133 SMB_ACL_ENTRY_T entry;
4135 BOOL seen_mask = False;
4136 BOOL seen_owning_group = False;
4140 DEBUG(10,("check_posix_acl_group_access: requesting 0x%x on file %s\n",
4141 (unsigned int)access_mask, fname ));
4143 if ((posix_acl = SMB_VFS_SYS_ACL_GET_FILE(conn, fname, SMB_ACL_TYPE_ACCESS)) == NULL) {
4147 /* First ensure the group mask allows group access. */
4148 /* Also check any user entries (these take preference over group). */
4150 while ( SMB_VFS_SYS_ACL_GET_ENTRY(conn, posix_acl, entry_id, &entry) == 1) {
4151 SMB_ACL_TAG_T tagtype;
4152 SMB_ACL_PERMSET_T permset;
4153 int have_write = -1;
4157 if (entry_id == SMB_ACL_FIRST_ENTRY)
4158 entry_id = SMB_ACL_NEXT_ENTRY;
4160 if (SMB_VFS_SYS_ACL_GET_TAG_TYPE(conn, entry, &tagtype) == -1) {
4164 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, entry, &permset) == -1) {
4168 have_read = SMB_VFS_SYS_ACL_GET_PERM(conn, permset, SMB_ACL_READ);
4169 if (have_read == -1) {
4173 have_write = SMB_VFS_SYS_ACL_GET_PERM(conn, permset, SMB_ACL_WRITE);
4174 if (have_write == -1) {
4179 * Solaris returns 2 for this if write is available.
4180 * canonicalize to 0 or 1.
4182 have_write = (have_write ? 1 : 0);
4183 have_read = (have_read ? 1 : 0);
4188 switch (access_mask) {
4189 case FILE_READ_DATA:
4192 DEBUG(10,("check_posix_acl_group_access: file %s "
4193 "refusing read due to mask.\n", fname));
4197 case FILE_WRITE_DATA:
4200 DEBUG(10,("check_posix_acl_group_access: file %s "
4201 "refusing write due to mask.\n", fname));
4205 default: /* FILE_READ_DATA|FILE_WRITE_DATA */
4206 if (!have_write || !have_read) {
4208 DEBUG(10,("check_posix_acl_group_access: file %s "
4209 "refusing read/write due to mask.\n", fname));
4217 /* Check against current_user.ut.uid. */
4218 uid_t *puid = (uid_t *)SMB_VFS_SYS_ACL_GET_QUALIFIER(conn, entry);
4222 if (current_user.ut.uid == *puid) {
4223 /* We have a uid match but we must ensure we have seen the acl mask. */
4224 switch (access_mask) {
4225 case FILE_READ_DATA:
4228 case FILE_WRITE_DATA:
4231 default: /* FILE_READ_DATA|FILE_WRITE_DATA */
4232 ret = (have_write & have_read);
4235 DEBUG(10,("check_posix_acl_group_access: file %s "
4236 "match on user %u -> %s.\n",
4237 fname, (unsigned int)*puid,
4238 ret ? "can access" : "cannot access"));
4250 /* If ret is anything other than -1 we matched on a user entry. */
4255 /* Next check all group entries. */
4256 entry_id = SMB_ACL_FIRST_ENTRY;
4257 while ( SMB_VFS_SYS_ACL_GET_ENTRY(conn, posix_acl, entry_id, &entry) == 1) {
4258 SMB_ACL_TAG_T tagtype;
4259 SMB_ACL_PERMSET_T permset;
4260 int have_write = -1;
4264 if (entry_id == SMB_ACL_FIRST_ENTRY)
4265 entry_id = SMB_ACL_NEXT_ENTRY;
4267 if (SMB_VFS_SYS_ACL_GET_TAG_TYPE(conn, entry, &tagtype) == -1) {
4271 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, entry, &permset) == -1) {
4275 have_read = SMB_VFS_SYS_ACL_GET_PERM(conn, permset, SMB_ACL_READ);
4276 if (have_read == -1) {
4280 have_write = SMB_VFS_SYS_ACL_GET_PERM(conn, permset, SMB_ACL_WRITE);
4281 if (have_write == -1) {
4286 * Solaris returns 2 for this if write is available.
4287 * canonicalize to 0 or 1.
4289 have_write = (have_write ? 1 : 0);
4290 have_read = (have_read ? 1 : 0);
4294 case SMB_ACL_GROUP_OBJ:
4298 if (tagtype == SMB_ACL_GROUP) {
4299 pgid = (gid_t *)SMB_VFS_SYS_ACL_GET_QUALIFIER(conn, entry);
4301 seen_owning_group = True;
4302 pgid = &psbuf->st_gid;
4309 * Does it match the current effective group
4310 * or supplementary groups ?
4312 for (cu_gid = get_current_user_gid_first(&i); cu_gid != (gid_t)-1;
4313 cu_gid = get_current_user_gid_next(&i)) {
4314 if (cu_gid == *pgid) {
4315 switch (access_mask) {
4316 case FILE_READ_DATA:
4319 case FILE_WRITE_DATA:
4322 default: /* FILE_READ_DATA|FILE_WRITE_DATA */
4323 ret = (have_write & have_read);
4327 DEBUG(10,("check_posix_acl_group_access: file %s "
4328 "match on group %u -> can access.\n",
4329 fname, (unsigned int)cu_gid ));
4331 /* If we don't have access permission this entry doesn't
4332 terminate the enumeration of the entries. */
4336 /* But does terminate the group iteration. */
4347 /* If ret is -1 here we didn't match on the user entry or
4348 supplemental group entries. */
4350 DEBUG(10,("check_posix_acl_group_access: ret = %d before check_stat:\n", ret));
4355 * We only check the S_I[RW]GRP permissions if we haven't already
4356 * seen an owning group SMB_ACL_GROUP_OBJ ace entry. If there is an
4357 * SMB_ACL_GROUP_OBJ ace entry then the group bits in st_gid are
4358 * the same as the SMB_ACL_MASK bits, not the SMB_ACL_GROUP_OBJ
4359 * bits. Thanks to Marc Cousin <mcousin@sigma.fr> for pointing
4363 if (!seen_owning_group) {
4364 /* Do we match on the owning group entry ? */
4366 * Does it match the current effective group
4367 * or supplementary groups ?
4369 for (cu_gid = get_current_user_gid_first(&i); cu_gid != (gid_t)-1;
4370 cu_gid = get_current_user_gid_next(&i)) {
4371 if (cu_gid == psbuf->st_gid) {
4372 switch (access_mask) {
4373 case FILE_READ_DATA:
4374 ret = (psbuf->st_mode & S_IRGRP) ? 1 : 0;
4376 case FILE_WRITE_DATA:
4377 ret = (psbuf->st_mode & S_IWGRP) ? 1 : 0;
4379 default: /* FILE_READ_DATA|FILE_WRITE_DATA */
4380 if ((psbuf->st_mode & (S_IWGRP|S_IRGRP)) == (S_IWGRP|S_IRGRP)) {
4387 DEBUG(10,("check_posix_acl_group_access: file %s "
4388 "match on owning group %u -> %s.\n",
4389 fname, (unsigned int)psbuf->st_gid,
4390 ret ? "can access" : "cannot access"));
4395 if (cu_gid == (gid_t)-1) {
4396 DEBUG(10,("check_posix_acl_group_access: file %s "
4397 "failed to match on user or group in token (ret = %d).\n",
4405 SMB_VFS_SYS_ACL_FREE_ACL(conn, posix_acl);
4408 DEBUG(10,("check_posix_acl_group_access: file %s returning (ret = %d).\n", fname, ret ));
4412 /****************************************************************************
4413 Actually emulate the in-kernel access checking for delete access. We need
4414 this to successfully return ACCESS_DENIED on a file open for delete access.
4415 ****************************************************************************/
4417 BOOL can_delete_file_in_directory(connection_struct *conn, const char *fname)
4419 SMB_STRUCT_STAT sbuf;
4423 if (!CAN_WRITE(conn)) {
4427 /* Get the parent directory permission mask and owners. */
4428 pstrcpy(dname, parent_dirname(fname));
4429 if(SMB_VFS_STAT(conn, dname, &sbuf) != 0) {
4432 if (!S_ISDIR(sbuf.st_mode)) {
4435 if (current_user.ut.uid == 0 || conn->admin_user) {
4436 /* I'm sorry sir, I didn't know you were root... */
4440 /* Check primary owner write access. */
4441 if (current_user.ut.uid == sbuf.st_uid) {
4442 return (sbuf.st_mode & S_IWUSR) ? True : False;
4446 /* sticky bit means delete only by owner or root. */
4447 if (sbuf.st_mode & S_ISVTX) {
4448 SMB_STRUCT_STAT sbuf_file;
4449 if(SMB_VFS_STAT(conn, fname, &sbuf_file) != 0) {
4450 if (errno == ENOENT) {
4451 /* If the file doesn't already exist then
4452 * yes we'll be able to delete it. */
4458 * Patch from SATOH Fumiyasu <fumiyas@miraclelinux.com>
4459 * for bug #3348. Don't assume owning sticky bit
4460 * directory means write access allowed.
4462 if (current_user.ut.uid != sbuf_file.st_uid) {
4468 /* Check group or explicit user acl entry write access. */
4469 ret = check_posix_acl_group_access(conn, dname, &sbuf, FILE_WRITE_DATA);
4470 if (ret == 0 || ret == 1) {
4471 return ret ? True : False;
4474 /* Finally check other write access. */
4475 return (sbuf.st_mode & S_IWOTH) ? True : False;
4478 /****************************************************************************
4479 Actually emulate the in-kernel access checking for read/write access. We need
4480 this to successfully check for ability to write for dos filetimes.
4481 Note this doesn't take into account share write permissions.
4482 ****************************************************************************/
4484 BOOL can_access_file(connection_struct *conn, const char *fname, SMB_STRUCT_STAT *psbuf, uint32 access_mask)
4488 if (!(access_mask & (FILE_READ_DATA|FILE_WRITE_DATA))) {
4491 access_mask &= (FILE_READ_DATA|FILE_WRITE_DATA);
4493 DEBUG(10,("can_access_file: requesting 0x%x on file %s\n",
4494 (unsigned int)access_mask, fname ));
4496 if (current_user.ut.uid == 0 || conn->admin_user) {
4497 /* I'm sorry sir, I didn't know you were root... */
4501 if (!VALID_STAT(*psbuf)) {
4502 /* Get the file permission mask and owners. */
4503 if(SMB_VFS_STAT(conn, fname, psbuf) != 0) {
4508 /* Check primary owner access. */
4509 if (current_user.ut.uid == psbuf->st_uid) {
4510 switch (access_mask) {
4511 case FILE_READ_DATA:
4512 return (psbuf->st_mode & S_IRUSR) ? True : False;
4514 case FILE_WRITE_DATA:
4515 return (psbuf->st_mode & S_IWUSR) ? True : False;
4517 default: /* FILE_READ_DATA|FILE_WRITE_DATA */
4519 if ((psbuf->st_mode & (S_IWUSR|S_IRUSR)) == (S_IWUSR|S_IRUSR)) {
4527 /* Check group or explicit user acl entry access. */
4528 ret = check_posix_acl_group_access(conn, fname, psbuf, access_mask);
4529 if (ret == 0 || ret == 1) {
4530 return ret ? True : False;
4533 /* Finally check other access. */
4534 switch (access_mask) {
4535 case FILE_READ_DATA:
4536 return (psbuf->st_mode & S_IROTH) ? True : False;
4538 case FILE_WRITE_DATA:
4539 return (psbuf->st_mode & S_IWOTH) ? True : False;
4541 default: /* FILE_READ_DATA|FILE_WRITE_DATA */
4543 if ((psbuf->st_mode & (S_IWOTH|S_IROTH)) == (S_IWOTH|S_IROTH)) {
4550 /****************************************************************************
4551 Userspace check for write access.
4552 Note this doesn't take into account share write permissions.
4553 ****************************************************************************/
4555 BOOL can_write_to_file(connection_struct *conn, const char *fname, SMB_STRUCT_STAT *psbuf)
4557 return can_access_file(conn, fname, psbuf, FILE_WRITE_DATA);
4560 /********************************************************************
4561 Pull the NT ACL from a file on disk or the OpenEventlog() access
4562 check. Caller is responsible for freeing the returned security
4563 descriptor via TALLOC_FREE(). This is designed for dealing with
4564 user space access checks in smbd outside of the VFS. For example,
4565 checking access rights in OpenEventlog().
4567 Assume we are dealing with files (for now)
4568 ********************************************************************/
4570 SEC_DESC* get_nt_acl_no_snum( TALLOC_CTX *ctx, const char *fname)
4572 SEC_DESC *psd, *ret_sd;
4573 connection_struct conn;
4575 struct fd_handle fh;
4579 ZERO_STRUCT( conn );
4581 if ( !(conn.mem_ctx = talloc_init( "novfs_get_nt_acl" )) ) {
4582 DEBUG(0,("get_nt_acl_no_snum: talloc() failed!\n"));
4586 if (!(conn.params = TALLOC_P(conn.mem_ctx, struct share_params))) {
4587 DEBUG(0,("get_nt_acl_no_snum: talloc() failed!\n"));
4588 TALLOC_FREE(conn.mem_ctx);
4592 conn.params->service = -1;
4594 pstrcpy( path, "/" );
4595 set_conn_connectpath(&conn, path);
4597 if (!smbd_vfs_init(&conn)) {
4598 DEBUG(0,("get_nt_acl_no_snum: Unable to create a fake connection struct!\n"));
4599 conn_free_internal( &conn );
4603 ZERO_STRUCT( finfo );
4610 pstrcpy( filename, fname );
4611 finfo.fsp_name = filename;
4613 if (get_nt_acl( &finfo, DACL_SECURITY_INFORMATION, &psd ) == 0) {
4614 DEBUG(0,("get_nt_acl_no_snum: get_nt_acl returned zero.\n"));
4615 conn_free_internal( &conn );
4619 ret_sd = dup_sec_desc( ctx, psd );
4621 conn_free_internal( &conn );