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 const 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)
549 dbgtext( "canon_ace index %d. Type = %s ", num, pace->attr == ALLOW_ACE ? "allow" : "deny" );
550 dbgtext( "SID = %s ", sid_string_dbg(&pace->trustee));
551 if (pace->owner_type == UID_ACE) {
552 const char *u_name = uidtoname(pace->unix_ug.uid);
553 dbgtext( "uid %u (%s) ", (unsigned int)pace->unix_ug.uid, u_name );
554 } else if (pace->owner_type == GID_ACE) {
555 char *g_name = gidtoname(pace->unix_ug.gid);
556 dbgtext( "gid %u (%s) ", (unsigned int)pace->unix_ug.gid, g_name );
559 switch (pace->type) {
561 dbgtext( "SMB_ACL_USER ");
563 case SMB_ACL_USER_OBJ:
564 dbgtext( "SMB_ACL_USER_OBJ ");
567 dbgtext( "SMB_ACL_GROUP ");
569 case SMB_ACL_GROUP_OBJ:
570 dbgtext( "SMB_ACL_GROUP_OBJ ");
573 dbgtext( "SMB_ACL_OTHER ");
580 dbgtext( "(inherited) ");
582 dbgtext( "%c", pace->perms & S_IRUSR ? 'r' : '-');
583 dbgtext( "%c", pace->perms & S_IWUSR ? 'w' : '-');
584 dbgtext( "%c\n", pace->perms & S_IXUSR ? 'x' : '-');
587 /****************************************************************************
588 Print out a canon ace list.
589 ****************************************************************************/
591 static void print_canon_ace_list(const char *name, canon_ace *ace_list)
595 if( DEBUGLVL( 10 )) {
596 dbgtext( "print_canon_ace_list: %s\n", name );
597 for (;ace_list; ace_list = ace_list->next, count++)
598 print_canon_ace(ace_list, count );
602 /****************************************************************************
603 Map POSIX ACL perms to canon_ace permissions (a mode_t containing only S_(R|W|X)USR bits).
604 ****************************************************************************/
606 static mode_t convert_permset_to_mode_t(connection_struct *conn, SMB_ACL_PERMSET_T permset)
610 ret |= (SMB_VFS_SYS_ACL_GET_PERM(conn, permset, SMB_ACL_READ) ? S_IRUSR : 0);
611 ret |= (SMB_VFS_SYS_ACL_GET_PERM(conn, permset, SMB_ACL_WRITE) ? S_IWUSR : 0);
612 ret |= (SMB_VFS_SYS_ACL_GET_PERM(conn, permset, SMB_ACL_EXECUTE) ? S_IXUSR : 0);
617 /****************************************************************************
618 Map generic UNIX permissions to canon_ace permissions (a mode_t containing only S_(R|W|X)USR bits).
619 ****************************************************************************/
621 static mode_t unix_perms_to_acl_perms(mode_t mode, int r_mask, int w_mask, int x_mask)
635 /****************************************************************************
636 Map canon_ace permissions (a mode_t containing only S_(R|W|X)USR bits) to
637 an SMB_ACL_PERMSET_T.
638 ****************************************************************************/
640 static int map_acl_perms_to_permset(connection_struct *conn, mode_t mode, SMB_ACL_PERMSET_T *p_permset)
642 if (SMB_VFS_SYS_ACL_CLEAR_PERMS(conn, *p_permset) == -1)
644 if (mode & S_IRUSR) {
645 if (SMB_VFS_SYS_ACL_ADD_PERM(conn, *p_permset, SMB_ACL_READ) == -1)
648 if (mode & S_IWUSR) {
649 if (SMB_VFS_SYS_ACL_ADD_PERM(conn, *p_permset, SMB_ACL_WRITE) == -1)
652 if (mode & S_IXUSR) {
653 if (SMB_VFS_SYS_ACL_ADD_PERM(conn, *p_permset, SMB_ACL_EXECUTE) == -1)
659 /****************************************************************************
660 Function to create owner and group SIDs from a SMB_STRUCT_STAT.
661 ****************************************************************************/
663 static void create_file_sids(const SMB_STRUCT_STAT *psbuf, DOM_SID *powner_sid, DOM_SID *pgroup_sid)
665 uid_to_sid( powner_sid, psbuf->st_uid );
666 gid_to_sid( pgroup_sid, psbuf->st_gid );
669 /****************************************************************************
670 Is the identity in two ACEs equal ? Check both SID and uid/gid.
671 ****************************************************************************/
673 static bool identity_in_ace_equal(canon_ace *ace1, canon_ace *ace2)
675 if (sid_equal(&ace1->trustee, &ace2->trustee)) {
678 if (ace1->owner_type == ace2->owner_type) {
679 if (ace1->owner_type == UID_ACE &&
680 ace1->unix_ug.uid == ace2->unix_ug.uid) {
682 } else if (ace1->owner_type == GID_ACE &&
683 ace1->unix_ug.gid == ace2->unix_ug.gid) {
690 /****************************************************************************
691 Merge aces with a common sid - if both are allow or deny, OR the permissions together and
692 delete the second one. If the first is deny, mask the permissions off and delete the allow
693 if the permissions become zero, delete the deny if the permissions are non zero.
694 ****************************************************************************/
696 static void merge_aces( canon_ace **pp_list_head )
698 canon_ace *list_head = *pp_list_head;
699 canon_ace *curr_ace_outer;
700 canon_ace *curr_ace_outer_next;
703 * First, merge allow entries with identical SIDs, and deny entries
704 * with identical SIDs.
707 for (curr_ace_outer = list_head; curr_ace_outer; curr_ace_outer = curr_ace_outer_next) {
709 canon_ace *curr_ace_next;
711 curr_ace_outer_next = curr_ace_outer->next; /* Save the link in case we delete. */
713 for (curr_ace = curr_ace_outer->next; curr_ace; curr_ace = curr_ace_next) {
715 curr_ace_next = curr_ace->next; /* Save the link in case of delete. */
717 if (identity_in_ace_equal(curr_ace, curr_ace_outer) &&
718 (curr_ace->attr == curr_ace_outer->attr)) {
720 if( DEBUGLVL( 10 )) {
721 dbgtext("merge_aces: Merging ACE's\n");
722 print_canon_ace( curr_ace_outer, 0);
723 print_canon_ace( curr_ace, 0);
726 /* Merge two allow or two deny ACE's. */
728 curr_ace_outer->perms |= curr_ace->perms;
729 DLIST_REMOVE(list_head, curr_ace);
731 curr_ace_outer_next = curr_ace_outer->next; /* We may have deleted the link. */
737 * Now go through and mask off allow permissions with deny permissions.
738 * We can delete either the allow or deny here as we know that each SID
739 * appears only once in the list.
742 for (curr_ace_outer = list_head; curr_ace_outer; curr_ace_outer = curr_ace_outer_next) {
744 canon_ace *curr_ace_next;
746 curr_ace_outer_next = curr_ace_outer->next; /* Save the link in case we delete. */
748 for (curr_ace = curr_ace_outer->next; curr_ace; curr_ace = curr_ace_next) {
750 curr_ace_next = curr_ace->next; /* Save the link in case of delete. */
753 * Subtract ACE's with different entries. Due to the ordering constraints
754 * we've put on the ACL, we know the deny must be the first one.
757 if (identity_in_ace_equal(curr_ace, curr_ace_outer) &&
758 (curr_ace_outer->attr == DENY_ACE) && (curr_ace->attr == ALLOW_ACE)) {
760 if( DEBUGLVL( 10 )) {
761 dbgtext("merge_aces: Masking ACE's\n");
762 print_canon_ace( curr_ace_outer, 0);
763 print_canon_ace( curr_ace, 0);
766 curr_ace->perms &= ~curr_ace_outer->perms;
768 if (curr_ace->perms == 0) {
771 * The deny overrides the allow. Remove the allow.
774 DLIST_REMOVE(list_head, curr_ace);
776 curr_ace_outer_next = curr_ace_outer->next; /* We may have deleted the link. */
781 * Even after removing permissions, there
782 * are still allow permissions - delete the deny.
783 * It is safe to delete the deny here,
784 * as we are guarenteed by the deny first
785 * ordering that all the deny entries for
786 * this SID have already been merged into one
787 * before we can get to an allow ace.
790 DLIST_REMOVE(list_head, curr_ace_outer);
791 SAFE_FREE(curr_ace_outer);
796 } /* end for curr_ace */
797 } /* end for curr_ace_outer */
799 /* We may have modified the list. */
801 *pp_list_head = list_head;
804 /****************************************************************************
805 Check if we need to return NT4.x compatible ACL entries.
806 ****************************************************************************/
808 static bool nt4_compatible_acls(void)
810 int compat = lp_acl_compatibility();
812 if (compat == ACL_COMPAT_AUTO) {
813 enum remote_arch_types ra_type = get_remote_arch();
815 /* Automatically adapt to client */
816 return (ra_type <= RA_WINNT);
818 return (compat == ACL_COMPAT_WINNT);
822 /****************************************************************************
823 Map canon_ace perms to permission bits NT.
824 The attr element is not used here - we only process deny entries on set,
825 not get. Deny entries are implicit on get with ace->perms = 0.
826 ****************************************************************************/
828 static SEC_ACCESS map_canon_ace_perms(int snum,
836 *pacl_type = SEC_ACE_TYPE_ACCESS_ALLOWED;
838 if (lp_acl_map_full_control(snum) && ((perms & ALL_ACE_PERMS) == ALL_ACE_PERMS)) {
840 nt_mask = UNIX_DIRECTORY_ACCESS_RWX;
842 nt_mask = UNIX_ACCESS_RWX;
844 } else if ((perms & ALL_ACE_PERMS) == (mode_t)0) {
846 * Windows NT refuses to display ACEs with no permissions in them (but
847 * they are perfectly legal with Windows 2000). If the ACE has empty
848 * permissions we cannot use 0, so we use the otherwise unused
849 * WRITE_OWNER permission, which we ignore when we set an ACL.
850 * We abstract this into a #define of UNIX_ACCESS_NONE to allow this
851 * to be changed in the future.
854 if (nt4_compatible_acls())
855 nt_mask = UNIX_ACCESS_NONE;
860 nt_mask |= ((perms & S_IRUSR) ? UNIX_DIRECTORY_ACCESS_R : 0 );
861 nt_mask |= ((perms & S_IWUSR) ? UNIX_DIRECTORY_ACCESS_W : 0 );
862 nt_mask |= ((perms & S_IXUSR) ? UNIX_DIRECTORY_ACCESS_X : 0 );
864 nt_mask |= ((perms & S_IRUSR) ? UNIX_ACCESS_R : 0 );
865 nt_mask |= ((perms & S_IWUSR) ? UNIX_ACCESS_W : 0 );
866 nt_mask |= ((perms & S_IXUSR) ? UNIX_ACCESS_X : 0 );
870 DEBUG(10,("map_canon_ace_perms: Mapped (UNIX) %x to (NT) %x\n",
871 (unsigned int)perms, (unsigned int)nt_mask ));
873 init_sec_access(&sa,nt_mask);
877 /****************************************************************************
878 Map NT perms to a UNIX mode_t.
879 ****************************************************************************/
881 #define FILE_SPECIFIC_READ_BITS (FILE_READ_DATA|FILE_READ_EA|FILE_READ_ATTRIBUTES)
882 #define FILE_SPECIFIC_WRITE_BITS (FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_WRITE_EA|FILE_WRITE_ATTRIBUTES)
883 #define FILE_SPECIFIC_EXECUTE_BITS (FILE_EXECUTE)
885 static mode_t map_nt_perms( uint32 *mask, int type)
891 if((*mask) & GENERIC_ALL_ACCESS)
892 mode = S_IRUSR|S_IWUSR|S_IXUSR;
894 mode |= ((*mask) & (GENERIC_READ_ACCESS|FILE_SPECIFIC_READ_BITS)) ? S_IRUSR : 0;
895 mode |= ((*mask) & (GENERIC_WRITE_ACCESS|FILE_SPECIFIC_WRITE_BITS)) ? S_IWUSR : 0;
896 mode |= ((*mask) & (GENERIC_EXECUTE_ACCESS|FILE_SPECIFIC_EXECUTE_BITS)) ? S_IXUSR : 0;
900 if((*mask) & GENERIC_ALL_ACCESS)
901 mode = S_IRGRP|S_IWGRP|S_IXGRP;
903 mode |= ((*mask) & (GENERIC_READ_ACCESS|FILE_SPECIFIC_READ_BITS)) ? S_IRGRP : 0;
904 mode |= ((*mask) & (GENERIC_WRITE_ACCESS|FILE_SPECIFIC_WRITE_BITS)) ? S_IWGRP : 0;
905 mode |= ((*mask) & (GENERIC_EXECUTE_ACCESS|FILE_SPECIFIC_EXECUTE_BITS)) ? S_IXGRP : 0;
909 if((*mask) & GENERIC_ALL_ACCESS)
910 mode = S_IROTH|S_IWOTH|S_IXOTH;
912 mode |= ((*mask) & (GENERIC_READ_ACCESS|FILE_SPECIFIC_READ_BITS)) ? S_IROTH : 0;
913 mode |= ((*mask) & (GENERIC_WRITE_ACCESS|FILE_SPECIFIC_WRITE_BITS)) ? S_IWOTH : 0;
914 mode |= ((*mask) & (GENERIC_EXECUTE_ACCESS|FILE_SPECIFIC_EXECUTE_BITS)) ? S_IXOTH : 0;
922 /****************************************************************************
923 Unpack a SEC_DESC into a UNIX owner and group.
924 ****************************************************************************/
926 NTSTATUS unpack_nt_owners(int snum, uid_t *puser, gid_t *pgrp, uint32 security_info_sent, SEC_DESC *psd)
934 if(security_info_sent == 0) {
935 DEBUG(0,("unpack_nt_owners: no security info sent !\n"));
940 * Validate the owner and group SID's.
943 memset(&owner_sid, '\0', sizeof(owner_sid));
944 memset(&grp_sid, '\0', sizeof(grp_sid));
946 DEBUG(5,("unpack_nt_owners: validating owner_sids.\n"));
949 * Don't immediately fail if the owner sid cannot be validated.
950 * This may be a group chown only set.
953 if (security_info_sent & OWNER_SECURITY_INFORMATION) {
954 sid_copy(&owner_sid, psd->owner_sid);
955 if (!sid_to_uid(&owner_sid, puser)) {
956 if (lp_force_unknown_acl_user(snum)) {
957 /* this allows take ownership to work
959 *puser = current_user.ut.uid;
961 DEBUG(3,("unpack_nt_owners: unable to validate"
962 " owner sid for %s\n",
963 sid_string_dbg(&owner_sid)));
964 return NT_STATUS_INVALID_OWNER;
967 DEBUG(3,("unpack_nt_owners: owner sid mapped to uid %u\n",
968 (unsigned int)*puser ));
972 * Don't immediately fail if the group sid cannot be validated.
973 * This may be an owner chown only set.
976 if (security_info_sent & GROUP_SECURITY_INFORMATION) {
977 sid_copy(&grp_sid, psd->group_sid);
978 if (!sid_to_gid( &grp_sid, pgrp)) {
979 if (lp_force_unknown_acl_user(snum)) {
980 /* this allows take group ownership to work
982 *pgrp = current_user.ut.gid;
984 DEBUG(3,("unpack_nt_owners: unable to validate"
986 return NT_STATUS_INVALID_OWNER;
989 DEBUG(3,("unpack_nt_owners: group sid mapped to gid %u\n",
990 (unsigned int)*pgrp));
993 DEBUG(5,("unpack_nt_owners: owner_sids validated.\n"));
998 /****************************************************************************
999 Ensure the enforced permissions for this share apply.
1000 ****************************************************************************/
1002 static void apply_default_perms(const files_struct *fsp, canon_ace *pace, mode_t type)
1004 int snum = SNUM(fsp->conn);
1005 mode_t and_bits = (mode_t)0;
1006 mode_t or_bits = (mode_t)0;
1008 /* Get the initial bits to apply. */
1010 if (fsp->is_directory) {
1011 and_bits = lp_dir_security_mask(snum);
1012 or_bits = lp_force_dir_security_mode(snum);
1014 and_bits = lp_security_mask(snum);
1015 or_bits = lp_force_security_mode(snum);
1018 /* Now bounce them into the S_USR space. */
1021 /* Ensure owner has read access. */
1022 pace->perms |= S_IRUSR;
1023 if (fsp->is_directory)
1024 pace->perms |= (S_IWUSR|S_IXUSR);
1025 and_bits = unix_perms_to_acl_perms(and_bits, S_IRUSR, S_IWUSR, S_IXUSR);
1026 or_bits = unix_perms_to_acl_perms(or_bits, S_IRUSR, S_IWUSR, S_IXUSR);
1029 and_bits = unix_perms_to_acl_perms(and_bits, S_IRGRP, S_IWGRP, S_IXGRP);
1030 or_bits = unix_perms_to_acl_perms(or_bits, S_IRGRP, S_IWGRP, S_IXGRP);
1033 and_bits = unix_perms_to_acl_perms(and_bits, S_IROTH, S_IWOTH, S_IXOTH);
1034 or_bits = unix_perms_to_acl_perms(or_bits, S_IROTH, S_IWOTH, S_IXOTH);
1038 pace->perms = ((pace->perms & and_bits)|or_bits);
1041 /****************************************************************************
1042 Check if a given uid/SID is in a group gid/SID. This is probably very
1043 expensive and will need optimisation. A *lot* of optimisation :-). JRA.
1044 ****************************************************************************/
1046 static bool uid_entry_in_group( canon_ace *uid_ace, canon_ace *group_ace )
1048 const char *u_name = NULL;
1050 /* "Everyone" always matches every uid. */
1052 if (sid_equal(&group_ace->trustee, &global_sid_World))
1055 /* Assume that the current user is in the current group (force group) */
1057 if (uid_ace->unix_ug.uid == current_user.ut.uid && group_ace->unix_ug.gid == current_user.ut.gid)
1060 /* u_name talloc'ed off tos. */
1061 u_name = uidtoname(uid_ace->unix_ug.uid);
1065 return user_in_group_sid(u_name, &group_ace->trustee);
1068 /****************************************************************************
1069 A well formed POSIX file or default ACL has at least 3 entries, a
1070 SMB_ACL_USER_OBJ, SMB_ACL_GROUP_OBJ, SMB_ACL_OTHER_OBJ.
1071 In addition, the owner must always have at least read access.
1072 When using this call on get_acl, the pst struct is valid and contains
1073 the mode of the file. When using this call on set_acl, the pst struct has
1074 been modified to have a mode containing the default for this file or directory
1076 ****************************************************************************/
1078 static bool ensure_canon_entry_valid(canon_ace **pp_ace,
1079 const files_struct *fsp,
1080 const DOM_SID *pfile_owner_sid,
1081 const DOM_SID *pfile_grp_sid,
1082 const SMB_STRUCT_STAT *pst,
1086 bool got_user = False;
1087 bool got_grp = False;
1088 bool got_other = False;
1089 canon_ace *pace_other = NULL;
1091 for (pace = *pp_ace; pace; pace = pace->next) {
1092 if (pace->type == SMB_ACL_USER_OBJ) {
1095 apply_default_perms(fsp, pace, S_IRUSR);
1098 } else if (pace->type == SMB_ACL_GROUP_OBJ) {
1101 * Ensure create mask/force create mode is respected on set.
1105 apply_default_perms(fsp, pace, S_IRGRP);
1108 } else if (pace->type == SMB_ACL_OTHER) {
1111 * Ensure create mask/force create mode is respected on set.
1115 apply_default_perms(fsp, pace, S_IROTH);
1122 if ((pace = SMB_MALLOC_P(canon_ace)) == NULL) {
1123 DEBUG(0,("ensure_canon_entry_valid: malloc fail.\n"));
1128 pace->type = SMB_ACL_USER_OBJ;
1129 pace->owner_type = UID_ACE;
1130 pace->unix_ug.uid = pst->st_uid;
1131 pace->trustee = *pfile_owner_sid;
1132 pace->attr = ALLOW_ACE;
1135 /* See if the owning user is in any of the other groups in
1136 the ACE. If so, OR in the permissions from that group. */
1138 bool group_matched = False;
1139 canon_ace *pace_iter;
1141 for (pace_iter = *pp_ace; pace_iter; pace_iter = pace_iter->next) {
1142 if (pace_iter->type == SMB_ACL_GROUP_OBJ || pace_iter->type == SMB_ACL_GROUP) {
1143 if (uid_entry_in_group(pace, pace_iter)) {
1144 pace->perms |= pace_iter->perms;
1145 group_matched = True;
1150 /* If we only got an "everyone" perm, just use that. */
1151 if (!group_matched) {
1153 pace->perms = pace_other->perms;
1158 apply_default_perms(fsp, pace, S_IRUSR);
1160 pace->perms = unix_perms_to_acl_perms(pst->st_mode, S_IRUSR, S_IWUSR, S_IXUSR);
1163 DLIST_ADD(*pp_ace, pace);
1167 if ((pace = SMB_MALLOC_P(canon_ace)) == NULL) {
1168 DEBUG(0,("ensure_canon_entry_valid: malloc fail.\n"));
1173 pace->type = SMB_ACL_GROUP_OBJ;
1174 pace->owner_type = GID_ACE;
1175 pace->unix_ug.uid = pst->st_gid;
1176 pace->trustee = *pfile_grp_sid;
1177 pace->attr = ALLOW_ACE;
1179 /* If we only got an "everyone" perm, just use that. */
1181 pace->perms = pace_other->perms;
1184 apply_default_perms(fsp, pace, S_IRGRP);
1186 pace->perms = unix_perms_to_acl_perms(pst->st_mode, S_IRGRP, S_IWGRP, S_IXGRP);
1189 DLIST_ADD(*pp_ace, pace);
1193 if ((pace = SMB_MALLOC_P(canon_ace)) == NULL) {
1194 DEBUG(0,("ensure_canon_entry_valid: malloc fail.\n"));
1199 pace->type = SMB_ACL_OTHER;
1200 pace->owner_type = WORLD_ACE;
1201 pace->unix_ug.world = -1;
1202 pace->trustee = global_sid_World;
1203 pace->attr = ALLOW_ACE;
1206 apply_default_perms(fsp, pace, S_IROTH);
1208 pace->perms = unix_perms_to_acl_perms(pst->st_mode, S_IROTH, S_IWOTH, S_IXOTH);
1210 DLIST_ADD(*pp_ace, pace);
1216 /****************************************************************************
1217 Check if a POSIX ACL has the required SMB_ACL_USER_OBJ and SMB_ACL_GROUP_OBJ entries.
1218 If it does not have them, check if there are any entries where the trustee is the
1219 file owner or the owning group, and map these to SMB_ACL_USER_OBJ and SMB_ACL_GROUP_OBJ.
1220 ****************************************************************************/
1222 static void check_owning_objs(canon_ace *ace, DOM_SID *pfile_owner_sid, DOM_SID *pfile_grp_sid)
1224 bool got_user_obj, got_group_obj;
1225 canon_ace *current_ace;
1228 entries = count_canon_ace_list(ace);
1229 got_user_obj = False;
1230 got_group_obj = False;
1232 for (i=0, current_ace = ace; i < entries; i++, current_ace = current_ace->next) {
1233 if (current_ace->type == SMB_ACL_USER_OBJ)
1234 got_user_obj = True;
1235 else if (current_ace->type == SMB_ACL_GROUP_OBJ)
1236 got_group_obj = True;
1238 if (got_user_obj && got_group_obj) {
1239 DEBUG(10,("check_owning_objs: ACL had owning user/group entries.\n"));
1243 for (i=0, current_ace = ace; i < entries; i++, current_ace = current_ace->next) {
1244 if (!got_user_obj && current_ace->owner_type == UID_ACE &&
1245 sid_equal(¤t_ace->trustee, pfile_owner_sid)) {
1246 current_ace->type = SMB_ACL_USER_OBJ;
1247 got_user_obj = True;
1249 if (!got_group_obj && current_ace->owner_type == GID_ACE &&
1250 sid_equal(¤t_ace->trustee, pfile_grp_sid)) {
1251 current_ace->type = SMB_ACL_GROUP_OBJ;
1252 got_group_obj = True;
1256 DEBUG(10,("check_owning_objs: ACL is missing an owner entry.\n"));
1258 DEBUG(10,("check_owning_objs: ACL is missing an owning group entry.\n"));
1261 /****************************************************************************
1262 Unpack a SEC_DESC into two canonical ace lists.
1263 ****************************************************************************/
1265 static bool create_canon_ace_lists(files_struct *fsp, SMB_STRUCT_STAT *pst,
1266 DOM_SID *pfile_owner_sid,
1267 DOM_SID *pfile_grp_sid,
1268 canon_ace **ppfile_ace, canon_ace **ppdir_ace,
1271 bool all_aces_are_inherit_only = (fsp->is_directory ? True : False);
1272 canon_ace *file_ace = NULL;
1273 canon_ace *dir_ace = NULL;
1274 canon_ace *current_ace = NULL;
1275 bool got_dir_allow = False;
1276 bool got_file_allow = False;
1283 * Convert the incoming ACL into a more regular form.
1286 for(i = 0; i < dacl->num_aces; i++) {
1287 SEC_ACE *psa = &dacl->aces[i];
1289 if((psa->type != SEC_ACE_TYPE_ACCESS_ALLOWED) && (psa->type != SEC_ACE_TYPE_ACCESS_DENIED)) {
1290 DEBUG(3,("create_canon_ace_lists: unable to set anything but an ALLOW or DENY ACE.\n"));
1294 if (nt4_compatible_acls()) {
1296 * The security mask may be UNIX_ACCESS_NONE which should map into
1297 * no permissions (we overload the WRITE_OWNER bit for this) or it
1298 * should be one of the ALL/EXECUTE/READ/WRITE bits. Arrange for this
1299 * to be so. Any other bits override the UNIX_ACCESS_NONE bit.
1303 * Convert GENERIC bits to specific bits.
1306 se_map_generic(&psa->access_mask, &file_generic_mapping);
1308 psa->access_mask &= (UNIX_ACCESS_NONE|FILE_ALL_ACCESS);
1310 if(psa->access_mask != UNIX_ACCESS_NONE)
1311 psa->access_mask &= ~UNIX_ACCESS_NONE;
1316 * Deal with the fact that NT 4.x re-writes the canonical format
1317 * that we return for default ACLs. If a directory ACE is identical
1318 * to a inherited directory ACE then NT changes the bits so that the
1319 * first ACE is set to OI|IO and the second ACE for this SID is set
1320 * to CI. We need to repair this. JRA.
1323 for(i = 0; i < dacl->num_aces; i++) {
1324 SEC_ACE *psa1 = &dacl->aces[i];
1326 for (j = i + 1; j < dacl->num_aces; j++) {
1327 SEC_ACE *psa2 = &dacl->aces[j];
1329 if (psa1->access_mask != psa2->access_mask)
1332 if (!sid_equal(&psa1->trustee, &psa2->trustee))
1336 * Ok - permission bits and SIDs are equal.
1337 * Check if flags were re-written.
1340 if (psa1->flags & SEC_ACE_FLAG_INHERIT_ONLY) {
1342 psa1->flags |= (psa2->flags & (SEC_ACE_FLAG_CONTAINER_INHERIT|SEC_ACE_FLAG_OBJECT_INHERIT));
1343 psa2->flags &= ~(SEC_ACE_FLAG_CONTAINER_INHERIT|SEC_ACE_FLAG_OBJECT_INHERIT);
1345 } else if (psa2->flags & SEC_ACE_FLAG_INHERIT_ONLY) {
1347 psa2->flags |= (psa1->flags & (SEC_ACE_FLAG_CONTAINER_INHERIT|SEC_ACE_FLAG_OBJECT_INHERIT));
1348 psa1->flags &= ~(SEC_ACE_FLAG_CONTAINER_INHERIT|SEC_ACE_FLAG_OBJECT_INHERIT);
1354 for(i = 0; i < dacl->num_aces; i++) {
1355 SEC_ACE *psa = &dacl->aces[i];
1358 * Create a cannon_ace entry representing this NT DACL ACE.
1361 if ((current_ace = SMB_MALLOC_P(canon_ace)) == NULL) {
1362 free_canon_ace_list(file_ace);
1363 free_canon_ace_list(dir_ace);
1364 DEBUG(0,("create_canon_ace_lists: malloc fail.\n"));
1368 ZERO_STRUCTP(current_ace);
1370 sid_copy(¤t_ace->trustee, &psa->trustee);
1373 * Try and work out if the SID is a user or group
1374 * as we need to flag these differently for POSIX.
1375 * Note what kind of a POSIX ACL this should map to.
1378 if( sid_equal(¤t_ace->trustee, &global_sid_World)) {
1379 current_ace->owner_type = WORLD_ACE;
1380 current_ace->unix_ug.world = -1;
1381 current_ace->type = SMB_ACL_OTHER;
1382 } else if (sid_equal(¤t_ace->trustee, &global_sid_Creator_Owner)) {
1383 current_ace->owner_type = UID_ACE;
1384 current_ace->unix_ug.uid = pst->st_uid;
1385 current_ace->type = SMB_ACL_USER_OBJ;
1388 * The Creator Owner entry only specifies inheritable permissions,
1389 * never access permissions. WinNT doesn't always set the ACE to
1390 *INHERIT_ONLY, though.
1393 if (nt4_compatible_acls())
1394 psa->flags |= SEC_ACE_FLAG_INHERIT_ONLY;
1395 } else if (sid_equal(¤t_ace->trustee, &global_sid_Creator_Group)) {
1396 current_ace->owner_type = GID_ACE;
1397 current_ace->unix_ug.gid = pst->st_gid;
1398 current_ace->type = SMB_ACL_GROUP_OBJ;
1401 * The Creator Group entry only specifies inheritable permissions,
1402 * never access permissions. WinNT doesn't always set the ACE to
1403 *INHERIT_ONLY, though.
1405 if (nt4_compatible_acls())
1406 psa->flags |= SEC_ACE_FLAG_INHERIT_ONLY;
1408 } else if (sid_to_uid( ¤t_ace->trustee, ¤t_ace->unix_ug.uid)) {
1409 current_ace->owner_type = UID_ACE;
1410 current_ace->type = SMB_ACL_USER;
1411 } else if (sid_to_gid( ¤t_ace->trustee, ¤t_ace->unix_ug.gid)) {
1412 current_ace->owner_type = GID_ACE;
1413 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 "
1421 "non-mappable SID %s\n",
1422 sid_string_dbg(&psa->trustee)));
1423 SAFE_FREE(current_ace);
1427 free_canon_ace_list(file_ace);
1428 free_canon_ace_list(dir_ace);
1429 DEBUG(0, ("create_canon_ace_lists: unable to map SID "
1430 "%s to uid or gid.\n",
1431 sid_string_dbg(¤t_ace->trustee)));
1432 SAFE_FREE(current_ace);
1437 * Map the given NT permissions into a UNIX mode_t containing only
1438 * S_I(R|W|X)USR bits.
1441 current_ace->perms |= map_nt_perms( &psa->access_mask, S_IRUSR);
1442 current_ace->attr = (psa->type == SEC_ACE_TYPE_ACCESS_ALLOWED) ? ALLOW_ACE : DENY_ACE;
1443 current_ace->inherited = ((psa->flags & SEC_ACE_FLAG_INHERITED_ACE) ? True : False);
1446 * Now add the created ace to either the file list, the directory
1447 * list, or both. We *MUST* preserve the order here (hence we use
1448 * DLIST_ADD_END) as NT ACLs are order dependent.
1451 if (fsp->is_directory) {
1454 * We can only add to the default POSIX ACE list if the ACE is
1455 * designed to be inherited by both files and directories.
1458 if ((psa->flags & (SEC_ACE_FLAG_OBJECT_INHERIT|SEC_ACE_FLAG_CONTAINER_INHERIT)) ==
1459 (SEC_ACE_FLAG_OBJECT_INHERIT|SEC_ACE_FLAG_CONTAINER_INHERIT)) {
1461 DLIST_ADD_END(dir_ace, current_ace, canon_ace *);
1464 * Note if this was an allow ace. We can't process
1465 * any further deny ace's after this.
1468 if (current_ace->attr == ALLOW_ACE)
1469 got_dir_allow = True;
1471 if ((current_ace->attr == DENY_ACE) && got_dir_allow) {
1472 DEBUG(0,("create_canon_ace_lists: malformed ACL in inheritable ACL ! \
1473 Deny entry after Allow entry. Failing to set on file %s.\n", fsp->fsp_name ));
1474 free_canon_ace_list(file_ace);
1475 free_canon_ace_list(dir_ace);
1479 if( DEBUGLVL( 10 )) {
1480 dbgtext("create_canon_ace_lists: adding dir ACL:\n");
1481 print_canon_ace( current_ace, 0);
1485 * If this is not an inherit only ACE we need to add a duplicate
1489 if (!(psa->flags & SEC_ACE_FLAG_INHERIT_ONLY)) {
1490 canon_ace *dup_ace = dup_canon_ace(current_ace);
1493 DEBUG(0,("create_canon_ace_lists: malloc fail !\n"));
1494 free_canon_ace_list(file_ace);
1495 free_canon_ace_list(dir_ace);
1500 * We must not free current_ace here as its
1501 * pointer is now owned by the dir_ace list.
1503 current_ace = dup_ace;
1506 * We must not free current_ace here as its
1507 * pointer is now owned by the dir_ace list.
1515 * Only add to the file ACL if not inherit only.
1518 if (current_ace && !(psa->flags & SEC_ACE_FLAG_INHERIT_ONLY)) {
1519 DLIST_ADD_END(file_ace, current_ace, canon_ace *);
1522 * Note if this was an allow ace. We can't process
1523 * any further deny ace's after this.
1526 if (current_ace->attr == ALLOW_ACE)
1527 got_file_allow = True;
1529 if ((current_ace->attr == DENY_ACE) && got_file_allow) {
1530 DEBUG(0,("create_canon_ace_lists: malformed ACL in file ACL ! \
1531 Deny entry after Allow entry. Failing to set on file %s.\n", fsp->fsp_name ));
1532 free_canon_ace_list(file_ace);
1533 free_canon_ace_list(dir_ace);
1537 if( DEBUGLVL( 10 )) {
1538 dbgtext("create_canon_ace_lists: adding file ACL:\n");
1539 print_canon_ace( current_ace, 0);
1541 all_aces_are_inherit_only = False;
1543 * We must not free current_ace here as its
1544 * pointer is now owned by the file_ace list.
1550 * Free if ACE was not added.
1553 SAFE_FREE(current_ace);
1556 if (fsp->is_directory && all_aces_are_inherit_only) {
1558 * Windows 2000 is doing one of these weird 'inherit acl'
1559 * traverses to conserve NTFS ACL resources. Just pretend
1560 * there was no DACL sent. JRA.
1563 DEBUG(10,("create_canon_ace_lists: Win2k inherit acl traverse. Ignoring DACL.\n"));
1564 free_canon_ace_list(file_ace);
1565 free_canon_ace_list(dir_ace);
1570 * Check if we have SMB_ACL_USER_OBJ and SMB_ACL_GROUP_OBJ entries in each
1571 * ACL. If we don't have them, check if any SMB_ACL_USER/SMB_ACL_GROUP
1572 * entries can be converted to *_OBJ. Usually we will already have these
1573 * entries in the Default ACL, and the Access ACL will not have them.
1576 check_owning_objs(file_ace, pfile_owner_sid, pfile_grp_sid);
1579 check_owning_objs(dir_ace, pfile_owner_sid, pfile_grp_sid);
1583 *ppfile_ace = file_ace;
1584 *ppdir_ace = dir_ace;
1589 /****************************************************************************
1590 ASCII art time again... JRA :-).
1592 We have 4 cases to process when moving from an NT ACL to a POSIX ACL. Firstly,
1593 we insist the ACL is in canonical form (ie. all DENY entries preceede ALLOW
1594 entries). Secondly, the merge code has ensured that all duplicate SID entries for
1595 allow or deny have been merged, so the same SID can only appear once in the deny
1596 list or once in the allow list.
1598 We then process as follows :
1600 ---------------------------------------------------------------------------
1601 First pass - look for a Everyone DENY entry.
1603 If it is deny all (rwx) trunate the list at this point.
1604 Else, walk the list from this point and use the deny permissions of this
1605 entry as a mask on all following allow entries. Finally, delete
1606 the Everyone DENY entry (we have applied it to everything possible).
1608 In addition, in this pass we remove any DENY entries that have
1609 no permissions (ie. they are a DENY nothing).
1610 ---------------------------------------------------------------------------
1611 Second pass - only deal with deny user entries.
1613 DENY user1 (perms XXX)
1616 for all following allow group entries where user1 is in group
1617 new_perms |= group_perms;
1619 user1 entry perms = new_perms & ~ XXX;
1621 Convert the deny entry to an allow entry with the new perms and
1622 push to the end of the list. Note if the user was in no groups
1623 this maps to a specific allow nothing entry for this user.
1625 The common case from the NT ACL choser (userX deny all) is
1626 optimised so we don't do the group lookup - we just map to
1627 an allow nothing entry.
1629 What we're doing here is inferring the allow permissions the
1630 person setting the ACE on user1 wanted by looking at the allow
1631 permissions on the groups the user is currently in. This will
1632 be a snapshot, depending on group membership but is the best
1633 we can do and has the advantage of failing closed rather than
1635 ---------------------------------------------------------------------------
1636 Third pass - only deal with deny group entries.
1638 DENY group1 (perms XXX)
1640 for all following allow user entries where user is in group1
1641 user entry perms = user entry perms & ~ XXX;
1643 If there is a group Everyone allow entry with permissions YYY,
1644 convert the group1 entry to an allow entry and modify its
1647 new_perms = YYY & ~ XXX
1649 and push to the end of the list.
1651 If there is no group Everyone allow entry then convert the
1652 group1 entry to a allow nothing entry and push to the end of the list.
1654 Note that the common case from the NT ACL choser (groupX deny all)
1655 cannot be optimised here as we need to modify user entries who are
1656 in the group to change them to a deny all also.
1658 What we're doing here is modifying the allow permissions of
1659 user entries (which are more specific in POSIX ACLs) to mask
1660 out the explicit deny set on the group they are in. This will
1661 be a snapshot depending on current group membership but is the
1662 best we can do and has the advantage of failing closed rather
1664 ---------------------------------------------------------------------------
1665 Fourth pass - cope with cumulative permissions.
1667 for all allow user entries, if there exists an allow group entry with
1668 more permissive permissions, and the user is in that group, rewrite the
1669 allow user permissions to contain both sets of permissions.
1671 Currently the code for this is #ifdef'ed out as these semantics make
1672 no sense to me. JRA.
1673 ---------------------------------------------------------------------------
1675 Note we *MUST* do the deny user pass first as this will convert deny user
1676 entries into allow user entries which can then be processed by the deny
1679 The above algorithm took a *lot* of thinking about - hence this
1680 explaination :-). JRA.
1681 ****************************************************************************/
1683 /****************************************************************************
1684 Process a canon_ace list entries. This is very complex code. We need
1685 to go through and remove the "deny" permissions from any allow entry that matches
1686 the id of this entry. We have already refused any NT ACL that wasn't in correct
1687 order (DENY followed by ALLOW). If any allow entry ends up with zero permissions,
1688 we just remove it (to fail safe). We have already removed any duplicate ace
1689 entries. Treat an "Everyone" DENY_ACE as a special case - use it to mask all
1691 ****************************************************************************/
1693 static void process_deny_list( canon_ace **pp_ace_list )
1695 canon_ace *ace_list = *pp_ace_list;
1696 canon_ace *curr_ace = NULL;
1697 canon_ace *curr_ace_next = NULL;
1699 /* Pass 1 above - look for an Everyone, deny entry. */
1701 for (curr_ace = ace_list; curr_ace; curr_ace = curr_ace_next) {
1702 canon_ace *allow_ace_p;
1704 curr_ace_next = curr_ace->next; /* So we can't lose the link. */
1706 if (curr_ace->attr != DENY_ACE)
1709 if (curr_ace->perms == (mode_t)0) {
1711 /* Deny nothing entry - delete. */
1713 DLIST_REMOVE(ace_list, curr_ace);
1717 if (!sid_equal(&curr_ace->trustee, &global_sid_World))
1720 /* JRATEST - assert. */
1721 SMB_ASSERT(curr_ace->owner_type == WORLD_ACE);
1723 if (curr_ace->perms == ALL_ACE_PERMS) {
1726 * Optimisation. This is a DENY_ALL to Everyone. Truncate the
1727 * list at this point including this entry.
1730 canon_ace *prev_entry = curr_ace->prev;
1732 free_canon_ace_list( curr_ace );
1734 prev_entry->next = NULL;
1736 /* We deleted the entire list. */
1742 for (allow_ace_p = curr_ace->next; allow_ace_p; allow_ace_p = allow_ace_p->next) {
1745 * Only mask off allow entries.
1748 if (allow_ace_p->attr != ALLOW_ACE)
1751 allow_ace_p->perms &= ~curr_ace->perms;
1755 * Now it's been applied, remove it.
1758 DLIST_REMOVE(ace_list, curr_ace);
1761 /* Pass 2 above - deal with deny user entries. */
1763 for (curr_ace = ace_list; curr_ace; curr_ace = curr_ace_next) {
1764 mode_t new_perms = (mode_t)0;
1765 canon_ace *allow_ace_p;
1767 curr_ace_next = curr_ace->next; /* So we can't lose the link. */
1769 if (curr_ace->attr != DENY_ACE)
1772 if (curr_ace->owner_type != UID_ACE)
1775 if (curr_ace->perms == ALL_ACE_PERMS) {
1778 * Optimisation - this is a deny everything to this user.
1779 * Convert to an allow nothing and push to the end of the list.
1782 curr_ace->attr = ALLOW_ACE;
1783 curr_ace->perms = (mode_t)0;
1784 DLIST_DEMOTE(ace_list, curr_ace, canon_ace *);
1788 for (allow_ace_p = curr_ace->next; allow_ace_p; allow_ace_p = allow_ace_p->next) {
1790 if (allow_ace_p->attr != ALLOW_ACE)
1793 /* We process GID_ACE and WORLD_ACE entries only. */
1795 if (allow_ace_p->owner_type == UID_ACE)
1798 if (uid_entry_in_group( curr_ace, allow_ace_p))
1799 new_perms |= allow_ace_p->perms;
1803 * Convert to a allow entry, modify the perms and push to the end
1807 curr_ace->attr = ALLOW_ACE;
1808 curr_ace->perms = (new_perms & ~curr_ace->perms);
1809 DLIST_DEMOTE(ace_list, curr_ace, canon_ace *);
1812 /* Pass 3 above - deal with deny group entries. */
1814 for (curr_ace = ace_list; curr_ace; curr_ace = curr_ace_next) {
1815 canon_ace *allow_ace_p;
1816 canon_ace *allow_everyone_p = NULL;
1818 curr_ace_next = curr_ace->next; /* So we can't lose the link. */
1820 if (curr_ace->attr != DENY_ACE)
1823 if (curr_ace->owner_type != GID_ACE)
1826 for (allow_ace_p = curr_ace->next; allow_ace_p; allow_ace_p = allow_ace_p->next) {
1828 if (allow_ace_p->attr != ALLOW_ACE)
1831 /* Store a pointer to the Everyone allow, if it exists. */
1832 if (allow_ace_p->owner_type == WORLD_ACE)
1833 allow_everyone_p = allow_ace_p;
1835 /* We process UID_ACE entries only. */
1837 if (allow_ace_p->owner_type != UID_ACE)
1840 /* Mask off the deny group perms. */
1842 if (uid_entry_in_group( allow_ace_p, curr_ace))
1843 allow_ace_p->perms &= ~curr_ace->perms;
1847 * Convert the deny to an allow with the correct perms and
1848 * push to the end of the list.
1851 curr_ace->attr = ALLOW_ACE;
1852 if (allow_everyone_p)
1853 curr_ace->perms = allow_everyone_p->perms & ~curr_ace->perms;
1855 curr_ace->perms = (mode_t)0;
1856 DLIST_DEMOTE(ace_list, curr_ace, canon_ace *);
1859 /* Doing this fourth pass allows Windows semantics to be layered
1860 * on top of POSIX semantics. I'm not sure if this is desirable.
1861 * For example, in W2K ACLs there is no way to say, "Group X no
1862 * access, user Y full access" if user Y is a member of group X.
1863 * This seems completely broken semantics to me.... JRA.
1867 /* Pass 4 above - deal with allow entries. */
1869 for (curr_ace = ace_list; curr_ace; curr_ace = curr_ace_next) {
1870 canon_ace *allow_ace_p;
1872 curr_ace_next = curr_ace->next; /* So we can't lose the link. */
1874 if (curr_ace->attr != ALLOW_ACE)
1877 if (curr_ace->owner_type != UID_ACE)
1880 for (allow_ace_p = ace_list; allow_ace_p; allow_ace_p = allow_ace_p->next) {
1882 if (allow_ace_p->attr != ALLOW_ACE)
1885 /* We process GID_ACE entries only. */
1887 if (allow_ace_p->owner_type != GID_ACE)
1890 /* OR in the group perms. */
1892 if (uid_entry_in_group( curr_ace, allow_ace_p))
1893 curr_ace->perms |= allow_ace_p->perms;
1898 *pp_ace_list = ace_list;
1901 /****************************************************************************
1902 Create a default mode that will be used if a security descriptor entry has
1903 no user/group/world entries.
1904 ****************************************************************************/
1906 static mode_t create_default_mode(files_struct *fsp, bool interitable_mode)
1908 int snum = SNUM(fsp->conn);
1909 mode_t and_bits = (mode_t)0;
1910 mode_t or_bits = (mode_t)0;
1911 mode_t mode = interitable_mode
1912 ? unix_mode( fsp->conn, FILE_ATTRIBUTE_ARCHIVE, fsp->fsp_name,
1916 if (fsp->is_directory)
1917 mode |= (S_IWUSR|S_IXUSR);
1920 * Now AND with the create mode/directory mode bits then OR with the
1921 * force create mode/force directory mode bits.
1924 if (fsp->is_directory) {
1925 and_bits = lp_dir_security_mask(snum);
1926 or_bits = lp_force_dir_security_mode(snum);
1928 and_bits = lp_security_mask(snum);
1929 or_bits = lp_force_security_mode(snum);
1932 return ((mode & and_bits)|or_bits);
1935 /****************************************************************************
1936 Unpack a SEC_DESC into two canonical ace lists. We don't depend on this
1938 ****************************************************************************/
1940 static bool unpack_canon_ace(files_struct *fsp,
1941 SMB_STRUCT_STAT *pst,
1942 DOM_SID *pfile_owner_sid,
1943 DOM_SID *pfile_grp_sid,
1944 canon_ace **ppfile_ace, canon_ace **ppdir_ace,
1945 uint32 security_info_sent, SEC_DESC *psd)
1947 canon_ace *file_ace = NULL;
1948 canon_ace *dir_ace = NULL;
1953 if(security_info_sent == 0) {
1954 DEBUG(0,("unpack_canon_ace: no security info sent !\n"));
1959 * If no DACL then this is a chown only security descriptor.
1962 if(!(security_info_sent & DACL_SECURITY_INFORMATION) || !psd->dacl)
1966 * Now go through the DACL and create the canon_ace lists.
1969 if (!create_canon_ace_lists( fsp, pst, pfile_owner_sid, pfile_grp_sid,
1970 &file_ace, &dir_ace, psd->dacl))
1973 if ((file_ace == NULL) && (dir_ace == NULL)) {
1974 /* W2K traverse DACL set - ignore. */
1979 * Go through the canon_ace list and merge entries
1980 * belonging to identical users of identical allow or deny type.
1981 * We can do this as all deny entries come first, followed by
1982 * all allow entries (we have mandated this before accepting this acl).
1985 print_canon_ace_list( "file ace - before merge", file_ace);
1986 merge_aces( &file_ace );
1988 print_canon_ace_list( "dir ace - before merge", dir_ace);
1989 merge_aces( &dir_ace );
1992 * NT ACLs are order dependent. Go through the acl lists and
1993 * process DENY entries by masking the allow entries.
1996 print_canon_ace_list( "file ace - before deny", file_ace);
1997 process_deny_list( &file_ace);
1999 print_canon_ace_list( "dir ace - before deny", dir_ace);
2000 process_deny_list( &dir_ace);
2003 * A well formed POSIX file or default ACL has at least 3 entries, a
2004 * SMB_ACL_USER_OBJ, SMB_ACL_GROUP_OBJ, SMB_ACL_OTHER_OBJ
2005 * and optionally a mask entry. Ensure this is the case.
2008 print_canon_ace_list( "file ace - before valid", file_ace);
2011 * A default 3 element mode entry for a file should be r-- --- ---.
2012 * A default 3 element mode entry for a directory should be rwx --- ---.
2015 pst->st_mode = create_default_mode(fsp, False);
2017 if (!ensure_canon_entry_valid(&file_ace, fsp, pfile_owner_sid, pfile_grp_sid, pst, True)) {
2018 free_canon_ace_list(file_ace);
2019 free_canon_ace_list(dir_ace);
2023 print_canon_ace_list( "dir ace - before valid", dir_ace);
2026 * A default inheritable 3 element mode entry for a directory should be the
2027 * mode Samba will use to create a file within. Ensure user rwx bits are set if
2031 pst->st_mode = create_default_mode(fsp, True);
2033 if (dir_ace && !ensure_canon_entry_valid(&dir_ace, fsp, pfile_owner_sid, pfile_grp_sid, pst, True)) {
2034 free_canon_ace_list(file_ace);
2035 free_canon_ace_list(dir_ace);
2039 print_canon_ace_list( "file ace - return", file_ace);
2040 print_canon_ace_list( "dir ace - return", dir_ace);
2042 *ppfile_ace = file_ace;
2043 *ppdir_ace = dir_ace;
2048 /******************************************************************************
2049 When returning permissions, try and fit NT display
2050 semantics if possible. Note the the canon_entries here must have been malloced.
2051 The list format should be - first entry = owner, followed by group and other user
2052 entries, last entry = other.
2054 Note that this doesn't exactly match the NT semantics for an ACL. As POSIX entries
2055 are not ordered, and match on the most specific entry rather than walking a list,
2056 then a simple POSIX permission of rw-r--r-- should really map to 5 entries,
2058 Entry 0: owner : deny all except read and write.
2059 Entry 1: owner : allow read and write.
2060 Entry 2: group : deny all except read.
2061 Entry 3: group : allow read.
2062 Entry 4: Everyone : allow read.
2064 But NT cannot display this in their ACL editor !
2065 ********************************************************************************/
2067 static void arrange_posix_perms(const char *filename, canon_ace **pp_list_head)
2069 canon_ace *list_head = *pp_list_head;
2070 canon_ace *owner_ace = NULL;
2071 canon_ace *other_ace = NULL;
2072 canon_ace *ace = NULL;
2074 for (ace = list_head; ace; ace = ace->next) {
2075 if (ace->type == SMB_ACL_USER_OBJ)
2077 else if (ace->type == SMB_ACL_OTHER) {
2078 /* Last ace - this is "other" */
2083 if (!owner_ace || !other_ace) {
2084 DEBUG(0,("arrange_posix_perms: Invalid POSIX permissions for file %s, missing owner or other.\n",
2090 * The POSIX algorithm applies to owner first, and other last,
2091 * so ensure they are arranged in this order.
2095 DLIST_PROMOTE(list_head, owner_ace);
2099 DLIST_DEMOTE(list_head, other_ace, canon_ace *);
2102 /* We have probably changed the head of the list. */
2104 *pp_list_head = list_head;
2107 /****************************************************************************
2108 Create a linked list of canonical ACE entries.
2109 ****************************************************************************/
2111 static canon_ace *canonicalise_acl( const files_struct *fsp, SMB_ACL_T posix_acl, SMB_STRUCT_STAT *psbuf,
2112 const DOM_SID *powner, const DOM_SID *pgroup, struct pai_val *pal, SMB_ACL_TYPE_T the_acl_type)
2114 connection_struct *conn = fsp->conn;
2115 mode_t acl_mask = (S_IRUSR|S_IWUSR|S_IXUSR);
2116 canon_ace *list_head = NULL;
2117 canon_ace *ace = NULL;
2118 canon_ace *next_ace = NULL;
2119 int entry_id = SMB_ACL_FIRST_ENTRY;
2120 SMB_ACL_ENTRY_T entry;
2123 while ( posix_acl && (SMB_VFS_SYS_ACL_GET_ENTRY(conn, posix_acl, entry_id, &entry) == 1)) {
2124 SMB_ACL_TAG_T tagtype;
2125 SMB_ACL_PERMSET_T permset;
2128 enum ace_owner owner_type;
2131 if (entry_id == SMB_ACL_FIRST_ENTRY)
2132 entry_id = SMB_ACL_NEXT_ENTRY;
2134 /* Is this a MASK entry ? */
2135 if (SMB_VFS_SYS_ACL_GET_TAG_TYPE(conn, entry, &tagtype) == -1)
2138 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, entry, &permset) == -1)
2141 /* Decide which SID to use based on the ACL type. */
2143 case SMB_ACL_USER_OBJ:
2144 /* Get the SID from the owner. */
2145 sid_copy(&sid, powner);
2146 unix_ug.uid = psbuf->st_uid;
2147 owner_type = UID_ACE;
2151 uid_t *puid = (uid_t *)SMB_VFS_SYS_ACL_GET_QUALIFIER(conn, entry);
2153 DEBUG(0,("canonicalise_acl: Failed to get uid.\n"));
2157 * A SMB_ACL_USER entry for the owner is shadowed by the
2158 * SMB_ACL_USER_OBJ entry and Windows also cannot represent
2159 * that entry, so we ignore it. We also don't create such
2160 * entries out of the blue when setting ACLs, so a get/set
2161 * cycle will drop them.
2163 if (the_acl_type == SMB_ACL_TYPE_ACCESS && *puid == psbuf->st_uid) {
2164 SMB_VFS_SYS_ACL_FREE_QUALIFIER(conn, (void *)puid,tagtype);
2167 uid_to_sid( &sid, *puid);
2168 unix_ug.uid = *puid;
2169 owner_type = UID_ACE;
2170 SMB_VFS_SYS_ACL_FREE_QUALIFIER(conn, (void *)puid,tagtype);
2173 case SMB_ACL_GROUP_OBJ:
2174 /* Get the SID from the owning group. */
2175 sid_copy(&sid, pgroup);
2176 unix_ug.gid = psbuf->st_gid;
2177 owner_type = GID_ACE;
2181 gid_t *pgid = (gid_t *)SMB_VFS_SYS_ACL_GET_QUALIFIER(conn, entry);
2183 DEBUG(0,("canonicalise_acl: Failed to get gid.\n"));
2186 gid_to_sid( &sid, *pgid);
2187 unix_ug.gid = *pgid;
2188 owner_type = GID_ACE;
2189 SMB_VFS_SYS_ACL_FREE_QUALIFIER(conn, (void *)pgid,tagtype);
2193 acl_mask = convert_permset_to_mode_t(conn, permset);
2194 continue; /* Don't count the mask as an entry. */
2196 /* Use the Everyone SID */
2197 sid = global_sid_World;
2199 owner_type = WORLD_ACE;
2202 DEBUG(0,("canonicalise_acl: Unknown tagtype %u\n", (unsigned int)tagtype));
2207 * Add this entry to the list.
2210 if ((ace = SMB_MALLOC_P(canon_ace)) == NULL)
2214 ace->type = tagtype;
2215 ace->perms = convert_permset_to_mode_t(conn, permset);
2216 ace->attr = ALLOW_ACE;
2218 ace->unix_ug = unix_ug;
2219 ace->owner_type = owner_type;
2220 ace->inherited = get_inherited_flag(pal, ace, (the_acl_type == SMB_ACL_TYPE_DEFAULT));
2222 DLIST_ADD(list_head, ace);
2226 * This next call will ensure we have at least a user/group/world set.
2229 if (!ensure_canon_entry_valid(&list_head, fsp, powner, pgroup, psbuf, False))
2233 * Now go through the list, masking the permissions with the
2234 * acl_mask. Ensure all DENY Entries are at the start of the list.
2237 DEBUG(10,("canonicalise_acl: %s ace entries before arrange :\n", the_acl_type == SMB_ACL_TYPE_ACCESS ? "Access" : "Default" ));
2239 for ( ace_count = 0, ace = list_head; ace; ace = next_ace, ace_count++) {
2240 next_ace = ace->next;
2242 /* Masks are only applied to entries other than USER_OBJ and OTHER. */
2243 if (ace->type != SMB_ACL_OTHER && ace->type != SMB_ACL_USER_OBJ)
2244 ace->perms &= acl_mask;
2246 if (ace->perms == 0) {
2247 DLIST_PROMOTE(list_head, ace);
2250 if( DEBUGLVL( 10 ) ) {
2251 print_canon_ace(ace, ace_count);
2255 arrange_posix_perms(fsp->fsp_name,&list_head );
2257 print_canon_ace_list( "canonicalise_acl: ace entries after arrange", list_head );
2263 free_canon_ace_list(list_head);
2267 /****************************************************************************
2268 Check if the current user group list contains a given group.
2269 ****************************************************************************/
2271 static bool current_user_in_group(gid_t gid)
2275 for (i = 0; i < current_user.ut.ngroups; i++) {
2276 if (current_user.ut.groups[i] == gid) {
2284 /****************************************************************************
2285 Should we override a deny ? Check deprecated 'acl group control'
2287 ****************************************************************************/
2289 static bool acl_group_override(connection_struct *conn, gid_t prim_gid)
2291 if ( (errno == EACCES || errno == EPERM)
2292 && (lp_acl_group_control(SNUM(conn)) || lp_dos_filemode(SNUM(conn)))
2293 && current_user_in_group(prim_gid))
2301 /****************************************************************************
2302 Attempt to apply an ACL to a file or directory.
2303 ****************************************************************************/
2305 static bool set_canon_ace_list(files_struct *fsp, canon_ace *the_ace, bool default_ace, gid_t prim_gid, bool *pacl_set_support)
2307 connection_struct *conn = fsp->conn;
2309 SMB_ACL_T the_acl = SMB_VFS_SYS_ACL_INIT(conn, (int)count_canon_ace_list(the_ace) + 1);
2312 SMB_ACL_ENTRY_T mask_entry;
2313 bool got_mask_entry = False;
2314 SMB_ACL_PERMSET_T mask_permset;
2315 SMB_ACL_TYPE_T the_acl_type = (default_ace ? SMB_ACL_TYPE_DEFAULT : SMB_ACL_TYPE_ACCESS);
2316 bool needs_mask = False;
2317 mode_t mask_perms = 0;
2319 #if defined(POSIX_ACL_NEEDS_MASK)
2320 /* HP-UX always wants to have a mask (called "class" there). */
2324 if (the_acl == NULL) {
2326 if (!no_acl_syscall_error(errno)) {
2328 * Only print this error message if we have some kind of ACL
2329 * support that's not working. Otherwise we would always get this.
2331 DEBUG(0,("set_canon_ace_list: Unable to init %s ACL. (%s)\n",
2332 default_ace ? "default" : "file", strerror(errno) ));
2334 *pacl_set_support = False;
2338 if( DEBUGLVL( 10 )) {
2339 dbgtext("set_canon_ace_list: setting ACL:\n");
2340 for (i = 0, p_ace = the_ace; p_ace; p_ace = p_ace->next, i++ ) {
2341 print_canon_ace( p_ace, i);
2345 for (i = 0, p_ace = the_ace; p_ace; p_ace = p_ace->next, i++ ) {
2346 SMB_ACL_ENTRY_T the_entry;
2347 SMB_ACL_PERMSET_T the_permset;
2350 * ACLs only "need" an ACL_MASK entry if there are any named user or
2351 * named group entries. But if there is an ACL_MASK entry, it applies
2352 * to ACL_USER, ACL_GROUP, and ACL_GROUP_OBJ entries. Set the mask
2353 * so that it doesn't deny (i.e., mask off) any permissions.
2356 if (p_ace->type == SMB_ACL_USER || p_ace->type == SMB_ACL_GROUP) {
2358 mask_perms |= p_ace->perms;
2359 } else if (p_ace->type == SMB_ACL_GROUP_OBJ) {
2360 mask_perms |= p_ace->perms;
2364 * Get the entry for this ACE.
2367 if (SMB_VFS_SYS_ACL_CREATE_ENTRY(conn, &the_acl, &the_entry) == -1) {
2368 DEBUG(0,("set_canon_ace_list: Failed to create entry %d. (%s)\n",
2369 i, strerror(errno) ));
2373 if (p_ace->type == SMB_ACL_MASK) {
2374 mask_entry = the_entry;
2375 got_mask_entry = True;
2379 * Ok - we now know the ACL calls should be working, don't
2380 * allow fallback to chmod.
2383 *pacl_set_support = True;
2386 * Initialise the entry from the canon_ace.
2390 * First tell the entry what type of ACE this is.
2393 if (SMB_VFS_SYS_ACL_SET_TAG_TYPE(conn, the_entry, p_ace->type) == -1) {
2394 DEBUG(0,("set_canon_ace_list: Failed to set tag type on entry %d. (%s)\n",
2395 i, strerror(errno) ));
2400 * Only set the qualifier (user or group id) if the entry is a user
2404 if ((p_ace->type == SMB_ACL_USER) || (p_ace->type == SMB_ACL_GROUP)) {
2405 if (SMB_VFS_SYS_ACL_SET_QUALIFIER(conn, the_entry,(void *)&p_ace->unix_ug.uid) == -1) {
2406 DEBUG(0,("set_canon_ace_list: Failed to set qualifier on entry %d. (%s)\n",
2407 i, strerror(errno) ));
2413 * Convert the mode_t perms in the canon_ace to a POSIX permset.
2416 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, the_entry, &the_permset) == -1) {
2417 DEBUG(0,("set_canon_ace_list: Failed to get permset on entry %d. (%s)\n",
2418 i, strerror(errno) ));
2422 if (map_acl_perms_to_permset(conn, p_ace->perms, &the_permset) == -1) {
2423 DEBUG(0,("set_canon_ace_list: Failed to create permset for mode (%u) on entry %d. (%s)\n",
2424 (unsigned int)p_ace->perms, i, strerror(errno) ));
2429 * ..and apply them to the entry.
2432 if (SMB_VFS_SYS_ACL_SET_PERMSET(conn, the_entry, the_permset) == -1) {
2433 DEBUG(0,("set_canon_ace_list: Failed to add permset on entry %d. (%s)\n",
2434 i, strerror(errno) ));
2439 print_canon_ace( p_ace, i);
2443 if (needs_mask && !got_mask_entry) {
2444 if (SMB_VFS_SYS_ACL_CREATE_ENTRY(conn, &the_acl, &mask_entry) == -1) {
2445 DEBUG(0,("set_canon_ace_list: Failed to create mask entry. (%s)\n", strerror(errno) ));
2449 if (SMB_VFS_SYS_ACL_SET_TAG_TYPE(conn, mask_entry, SMB_ACL_MASK) == -1) {
2450 DEBUG(0,("set_canon_ace_list: Failed to set tag type on mask entry. (%s)\n",strerror(errno) ));
2454 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, mask_entry, &mask_permset) == -1) {
2455 DEBUG(0,("set_canon_ace_list: Failed to get mask permset. (%s)\n", strerror(errno) ));
2459 if (map_acl_perms_to_permset(conn, S_IRUSR|S_IWUSR|S_IXUSR, &mask_permset) == -1) {
2460 DEBUG(0,("set_canon_ace_list: Failed to create mask permset. (%s)\n", strerror(errno) ));
2464 if (SMB_VFS_SYS_ACL_SET_PERMSET(conn, mask_entry, mask_permset) == -1) {
2465 DEBUG(0,("set_canon_ace_list: Failed to add mask permset. (%s)\n", strerror(errno) ));
2471 * Finally apply it to the file or directory.
2474 if(default_ace || fsp->is_directory || fsp->fh->fd == -1) {
2475 if (SMB_VFS_SYS_ACL_SET_FILE(conn, fsp->fsp_name, the_acl_type, the_acl) == -1) {
2477 * Some systems allow all the above calls and only fail with no ACL support
2478 * when attempting to apply the acl. HPUX with HFS is an example of this. JRA.
2480 if (no_acl_syscall_error(errno)) {
2481 *pacl_set_support = False;
2484 if (acl_group_override(conn, prim_gid)) {
2487 DEBUG(5,("set_canon_ace_list: acl group control on and current user in file %s primary group.\n",
2491 sret = SMB_VFS_SYS_ACL_SET_FILE(conn, fsp->fsp_name, the_acl_type, the_acl);
2499 DEBUG(2,("set_canon_ace_list: sys_acl_set_file type %s failed for file %s (%s).\n",
2500 the_acl_type == SMB_ACL_TYPE_DEFAULT ? "directory default" : "file",
2501 fsp->fsp_name, strerror(errno) ));
2506 if (SMB_VFS_SYS_ACL_SET_FD(fsp, fsp->fh->fd, the_acl) == -1) {
2508 * Some systems allow all the above calls and only fail with no ACL support
2509 * when attempting to apply the acl. HPUX with HFS is an example of this. JRA.
2511 if (no_acl_syscall_error(errno)) {
2512 *pacl_set_support = False;
2515 if (acl_group_override(conn, prim_gid)) {
2518 DEBUG(5,("set_canon_ace_list: acl group control on and current user in file %s primary group.\n",
2522 sret = SMB_VFS_SYS_ACL_SET_FD(fsp, fsp->fh->fd, the_acl);
2530 DEBUG(2,("set_canon_ace_list: sys_acl_set_file failed for file %s (%s).\n",
2531 fsp->fsp_name, strerror(errno) ));
2541 if (the_acl != NULL) {
2542 SMB_VFS_SYS_ACL_FREE_ACL(conn, the_acl);
2548 /****************************************************************************
2549 Find a particular canon_ace entry.
2550 ****************************************************************************/
2552 static struct canon_ace *canon_ace_entry_for(struct canon_ace *list, SMB_ACL_TAG_T type, posix_id *id)
2555 if (list->type == type && ((type != SMB_ACL_USER && type != SMB_ACL_GROUP) ||
2556 (type == SMB_ACL_USER && id && id->uid == list->unix_ug.uid) ||
2557 (type == SMB_ACL_GROUP && id && id->gid == list->unix_ug.gid)))
2564 /****************************************************************************
2566 ****************************************************************************/
2568 SMB_ACL_T free_empty_sys_acl(connection_struct *conn, SMB_ACL_T the_acl)
2570 SMB_ACL_ENTRY_T entry;
2574 if (SMB_VFS_SYS_ACL_GET_ENTRY(conn, the_acl, SMB_ACL_FIRST_ENTRY, &entry) != 1) {
2575 SMB_VFS_SYS_ACL_FREE_ACL(conn, the_acl);
2581 /****************************************************************************
2582 Convert a canon_ace to a generic 3 element permission - if possible.
2583 ****************************************************************************/
2585 #define MAP_PERM(p,mask,result) (((p) & (mask)) ? (result) : 0 )
2587 static bool convert_canon_ace_to_posix_perms( files_struct *fsp, canon_ace *file_ace_list, mode_t *posix_perms)
2589 int snum = SNUM(fsp->conn);
2590 size_t ace_count = count_canon_ace_list(file_ace_list);
2592 canon_ace *owner_ace = NULL;
2593 canon_ace *group_ace = NULL;
2594 canon_ace *other_ace = NULL;
2598 if (ace_count != 3) {
2599 DEBUG(3,("convert_canon_ace_to_posix_perms: Too many ACE entries for file %s to convert to \
2600 posix perms.\n", fsp->fsp_name ));
2604 for (ace_p = file_ace_list; ace_p; ace_p = ace_p->next) {
2605 if (ace_p->owner_type == UID_ACE)
2607 else if (ace_p->owner_type == GID_ACE)
2609 else if (ace_p->owner_type == WORLD_ACE)
2613 if (!owner_ace || !group_ace || !other_ace) {
2614 DEBUG(3,("convert_canon_ace_to_posix_perms: Can't get standard entries for file %s.\n",
2619 *posix_perms = (mode_t)0;
2621 *posix_perms |= owner_ace->perms;
2622 *posix_perms |= MAP_PERM(group_ace->perms, S_IRUSR, S_IRGRP);
2623 *posix_perms |= MAP_PERM(group_ace->perms, S_IWUSR, S_IWGRP);
2624 *posix_perms |= MAP_PERM(group_ace->perms, S_IXUSR, S_IXGRP);
2625 *posix_perms |= MAP_PERM(other_ace->perms, S_IRUSR, S_IROTH);
2626 *posix_perms |= MAP_PERM(other_ace->perms, S_IWUSR, S_IWOTH);
2627 *posix_perms |= MAP_PERM(other_ace->perms, S_IXUSR, S_IXOTH);
2629 /* The owner must have at least read access. */
2631 *posix_perms |= S_IRUSR;
2632 if (fsp->is_directory)
2633 *posix_perms |= (S_IWUSR|S_IXUSR);
2635 /* If requested apply the masks. */
2637 /* Get the initial bits to apply. */
2639 if (fsp->is_directory) {
2640 and_bits = lp_dir_security_mask(snum);
2641 or_bits = lp_force_dir_security_mode(snum);
2643 and_bits = lp_security_mask(snum);
2644 or_bits = lp_force_security_mode(snum);
2647 *posix_perms = (((*posix_perms) & and_bits)|or_bits);
2649 DEBUG(10,("convert_canon_ace_to_posix_perms: converted u=%o,g=%o,w=%o to perm=0%o for file %s.\n",
2650 (int)owner_ace->perms, (int)group_ace->perms, (int)other_ace->perms, (int)*posix_perms,
2656 /****************************************************************************
2657 Incoming NT ACLs on a directory can be split into a default POSIX acl (CI|OI|IO) and
2658 a normal POSIX acl. Win2k needs these split acls re-merging into one ACL
2659 with CI|OI set so it is inherited and also applies to the directory.
2660 Based on code from "Jim McDonough" <jmcd@us.ibm.com>.
2661 ****************************************************************************/
2663 static size_t merge_default_aces( SEC_ACE *nt_ace_list, size_t num_aces)
2667 for (i = 0; i < num_aces; i++) {
2668 for (j = i+1; j < num_aces; j++) {
2669 uint32 i_flags_ni = (nt_ace_list[i].flags & ~SEC_ACE_FLAG_INHERITED_ACE);
2670 uint32 j_flags_ni = (nt_ace_list[j].flags & ~SEC_ACE_FLAG_INHERITED_ACE);
2671 bool i_inh = (nt_ace_list[i].flags & SEC_ACE_FLAG_INHERITED_ACE) ? True : False;
2672 bool j_inh = (nt_ace_list[j].flags & SEC_ACE_FLAG_INHERITED_ACE) ? True : False;
2674 /* We know the lower number ACE's are file entries. */
2675 if ((nt_ace_list[i].type == nt_ace_list[j].type) &&
2676 (nt_ace_list[i].size == nt_ace_list[j].size) &&
2677 (nt_ace_list[i].access_mask == nt_ace_list[j].access_mask) &&
2678 sid_equal(&nt_ace_list[i].trustee, &nt_ace_list[j].trustee) &&
2680 (i_flags_ni == 0) &&
2681 (j_flags_ni == (SEC_ACE_FLAG_OBJECT_INHERIT|
2682 SEC_ACE_FLAG_CONTAINER_INHERIT|
2683 SEC_ACE_FLAG_INHERIT_ONLY))) {
2685 * W2K wants to have access allowed zero access ACE's
2686 * at the end of the list. If the mask is zero, merge
2687 * the non-inherited ACE onto the inherited ACE.
2690 if (nt_ace_list[i].access_mask == 0) {
2691 nt_ace_list[j].flags = SEC_ACE_FLAG_OBJECT_INHERIT|SEC_ACE_FLAG_CONTAINER_INHERIT|
2692 (i_inh ? SEC_ACE_FLAG_INHERITED_ACE : 0);
2693 if (num_aces - i - 1 > 0)
2694 memmove(&nt_ace_list[i], &nt_ace_list[i+1], (num_aces-i-1) *
2697 DEBUG(10,("merge_default_aces: Merging zero access ACE %u onto ACE %u.\n",
2698 (unsigned int)i, (unsigned int)j ));
2701 * These are identical except for the flags.
2702 * Merge the inherited ACE onto the non-inherited ACE.
2705 nt_ace_list[i].flags = SEC_ACE_FLAG_OBJECT_INHERIT|SEC_ACE_FLAG_CONTAINER_INHERIT|
2706 (i_inh ? SEC_ACE_FLAG_INHERITED_ACE : 0);
2707 if (num_aces - j - 1 > 0)
2708 memmove(&nt_ace_list[j], &nt_ace_list[j+1], (num_aces-j-1) *
2711 DEBUG(10,("merge_default_aces: Merging ACE %u onto ACE %u.\n",
2712 (unsigned int)j, (unsigned int)i ));
2722 /****************************************************************************
2723 Reply to query a security descriptor from an fsp. If it succeeds it allocates
2724 the space for the return elements and returns the size needed to return the
2725 security descriptor. This should be the only external function needed for
2726 the UNIX style get ACL.
2727 ****************************************************************************/
2729 NTSTATUS get_nt_acl(files_struct *fsp, uint32 security_info, SEC_DESC **ppdesc)
2731 connection_struct *conn = fsp->conn;
2732 SMB_STRUCT_STAT sbuf;
2733 SEC_ACE *nt_ace_list = NULL;
2737 SEC_ACL *psa = NULL;
2738 size_t num_acls = 0;
2739 size_t num_def_acls = 0;
2740 size_t num_aces = 0;
2741 SMB_ACL_T posix_acl = NULL;
2742 SMB_ACL_T def_acl = NULL;
2743 canon_ace *file_ace = NULL;
2744 canon_ace *dir_ace = NULL;
2745 size_t num_profile_acls = 0;
2746 struct pai_val *pal = NULL;
2747 SEC_DESC *psd = NULL;
2751 DEBUG(10,("get_nt_acl: called for file %s\n", fsp->fsp_name ));
2753 if(fsp->is_directory || fsp->fh->fd == -1) {
2755 /* Get the stat struct for the owner info. */
2756 if(SMB_VFS_STAT(fsp->conn,fsp->fsp_name, &sbuf) != 0) {
2757 return map_nt_error_from_unix(errno);
2760 * Get the ACL from the path.
2763 posix_acl = SMB_VFS_SYS_ACL_GET_FILE(conn, fsp->fsp_name, SMB_ACL_TYPE_ACCESS);
2766 * If it's a directory get the default POSIX ACL.
2769 if(fsp->is_directory) {
2770 def_acl = SMB_VFS_SYS_ACL_GET_FILE(conn, fsp->fsp_name, SMB_ACL_TYPE_DEFAULT);
2771 def_acl = free_empty_sys_acl(conn, def_acl);
2776 /* Get the stat struct for the owner info. */
2777 if(SMB_VFS_FSTAT(fsp,fsp->fh->fd,&sbuf) != 0) {
2778 return map_nt_error_from_unix(errno);
2781 * Get the ACL from the fd.
2783 posix_acl = SMB_VFS_SYS_ACL_GET_FD(fsp, fsp->fh->fd);
2786 DEBUG(5,("get_nt_acl : file ACL %s, directory ACL %s\n",
2787 posix_acl ? "present" : "absent",
2788 def_acl ? "present" : "absent" ));
2790 pal = load_inherited_info(fsp);
2793 * Get the owner, group and world SIDs.
2796 if (lp_profile_acls(SNUM(conn))) {
2797 /* For WXP SP1 the owner must be administrators. */
2798 sid_copy(&owner_sid, &global_sid_Builtin_Administrators);
2799 sid_copy(&group_sid, &global_sid_Builtin_Users);
2800 num_profile_acls = 2;
2802 create_file_sids(&sbuf, &owner_sid, &group_sid);
2805 if ((security_info & DACL_SECURITY_INFORMATION) && !(security_info & PROTECTED_DACL_SECURITY_INFORMATION)) {
2808 * In the optimum case Creator Owner and Creator Group would be used for
2809 * the ACL_USER_OBJ and ACL_GROUP_OBJ entries, respectively, but this
2810 * would lead to usability problems under Windows: The Creator entries
2811 * are only available in browse lists of directories and not for files;
2812 * additionally the identity of the owning group couldn't be determined.
2813 * We therefore use those identities only for Default ACLs.
2816 /* Create the canon_ace lists. */
2817 file_ace = canonicalise_acl( fsp, posix_acl, &sbuf, &owner_sid, &group_sid, pal, SMB_ACL_TYPE_ACCESS );
2819 /* We must have *some* ACLS. */
2821 if (count_canon_ace_list(file_ace) == 0) {
2822 DEBUG(0,("get_nt_acl : No ACLs on file (%s) !\n", fsp->fsp_name ));
2826 if (fsp->is_directory && def_acl) {
2827 dir_ace = canonicalise_acl(fsp, def_acl, &sbuf,
2828 &global_sid_Creator_Owner,
2829 &global_sid_Creator_Group, pal, SMB_ACL_TYPE_DEFAULT );
2833 * Create the NT ACE list from the canonical ace lists.
2841 if (nt4_compatible_acls() && dir_ace) {
2843 * NT 4 chokes if an ACL contains an INHERIT_ONLY entry
2844 * but no non-INHERIT_ONLY entry for one SID. So we only
2845 * remove entries from the Access ACL if the
2846 * corresponding Default ACL entries have also been
2847 * removed. ACEs for CREATOR-OWNER and CREATOR-GROUP
2848 * are exceptions. We can do nothing
2849 * intelligent if the Default ACL contains entries that
2850 * are not also contained in the Access ACL, so this
2851 * case will still fail under NT 4.
2854 ace = canon_ace_entry_for(dir_ace, SMB_ACL_OTHER, NULL);
2855 if (ace && !ace->perms) {
2856 DLIST_REMOVE(dir_ace, ace);
2859 ace = canon_ace_entry_for(file_ace, SMB_ACL_OTHER, NULL);
2860 if (ace && !ace->perms) {
2861 DLIST_REMOVE(file_ace, ace);
2867 * WinNT doesn't usually have Creator Group
2868 * in browse lists, so we send this entry to
2869 * WinNT even if it contains no relevant
2870 * permissions. Once we can add
2871 * Creator Group to browse lists we can
2876 ace = canon_ace_entry_for(dir_ace, SMB_ACL_GROUP_OBJ, NULL);
2877 if (ace && !ace->perms) {
2878 DLIST_REMOVE(dir_ace, ace);
2883 ace = canon_ace_entry_for(file_ace, SMB_ACL_GROUP_OBJ, NULL);
2884 if (ace && !ace->perms) {
2885 DLIST_REMOVE(file_ace, ace);
2890 num_acls = count_canon_ace_list(file_ace);
2891 num_def_acls = count_canon_ace_list(dir_ace);
2893 /* Allocate the ace list. */
2894 if ((nt_ace_list = SMB_MALLOC_ARRAY(SEC_ACE,num_acls + num_profile_acls + num_def_acls)) == NULL) {
2895 DEBUG(0,("get_nt_acl: Unable to malloc space for nt_ace_list.\n"));
2899 memset(nt_ace_list, '\0', (num_acls + num_def_acls) * sizeof(SEC_ACE) );
2902 * Create the NT ACE list from the canonical ace lists.
2907 for (i = 0; i < num_acls; i++, ace = ace->next) {
2910 acc = map_canon_ace_perms(SNUM(conn),
2914 init_sec_ace(&nt_ace_list[num_aces++],
2919 SEC_ACE_FLAG_INHERITED_ACE : 0);
2922 /* The User must have access to a profile share - even
2923 * if we can't map the SID. */
2924 if (lp_profile_acls(SNUM(conn))) {
2927 init_sec_access(&acc,FILE_GENERIC_ALL);
2928 init_sec_ace(&nt_ace_list[num_aces++],
2929 &global_sid_Builtin_Users,
2930 SEC_ACE_TYPE_ACCESS_ALLOWED,
2936 for (i = 0; i < num_def_acls; i++, ace = ace->next) {
2939 acc = map_canon_ace_perms(SNUM(conn),
2943 init_sec_ace(&nt_ace_list[num_aces++],
2947 SEC_ACE_FLAG_OBJECT_INHERIT|
2948 SEC_ACE_FLAG_CONTAINER_INHERIT|
2949 SEC_ACE_FLAG_INHERIT_ONLY|
2951 SEC_ACE_FLAG_INHERITED_ACE : 0));
2954 /* The User must have access to a profile share - even
2955 * if we can't map the SID. */
2956 if (lp_profile_acls(SNUM(conn))) {
2959 init_sec_access(&acc,FILE_GENERIC_ALL);
2960 init_sec_ace(&nt_ace_list[num_aces++], &global_sid_Builtin_Users, SEC_ACE_TYPE_ACCESS_ALLOWED, acc,
2961 SEC_ACE_FLAG_OBJECT_INHERIT|SEC_ACE_FLAG_CONTAINER_INHERIT|
2962 SEC_ACE_FLAG_INHERIT_ONLY|0);
2966 * Merge POSIX default ACLs and normal ACLs into one NT ACE.
2967 * Win2K needs this to get the inheritance correct when replacing ACLs
2968 * on a directory tree. Based on work by Jim @ IBM.
2971 num_aces = merge_default_aces(nt_ace_list, num_aces);
2976 if((psa = make_sec_acl( talloc_tos(), NT4_ACL_REVISION, num_aces, nt_ace_list)) == NULL) {
2977 DEBUG(0,("get_nt_acl: Unable to malloc space for acl.\n"));
2981 } /* security_info & DACL_SECURITY_INFORMATION */
2983 psd = make_standard_sec_desc( talloc_tos(),
2984 (security_info & OWNER_SECURITY_INFORMATION) ? &owner_sid : NULL,
2985 (security_info & GROUP_SECURITY_INFORMATION) ? &group_sid : NULL,
2990 DEBUG(0,("get_nt_acl: Unable to malloc space for security descriptor.\n"));
2996 * Windows 2000: The DACL_PROTECTED flag in the security
2997 * descriptor marks the ACL as non-inheriting, i.e., no
2998 * ACEs from higher level directories propagate to this
2999 * ACL. In the POSIX ACL model permissions are only
3000 * inherited at file create time, so ACLs never contain
3001 * any ACEs that are inherited dynamically. The DACL_PROTECTED
3002 * flag doesn't seem to bother Windows NT.
3003 * Always set this if map acl inherit is turned off.
3005 if (get_protected_flag(pal) || !lp_map_acl_inherit(SNUM(conn))) {
3006 psd->type |= SE_DESC_DACL_PROTECTED;
3010 dacl_sort_into_canonical_order(psd->dacl->aces, (unsigned int)psd->dacl->num_aces);
3018 SMB_VFS_SYS_ACL_FREE_ACL(conn, posix_acl);
3021 SMB_VFS_SYS_ACL_FREE_ACL(conn, def_acl);
3023 free_canon_ace_list(file_ace);
3024 free_canon_ace_list(dir_ace);
3025 free_inherited_info(pal);
3026 SAFE_FREE(nt_ace_list);
3028 return NT_STATUS_OK;
3031 /****************************************************************************
3032 Try to chown a file. We will be able to chown it under the following conditions.
3034 1) If we have root privileges, then it will just work.
3035 2) If we have SeTakeOwnershipPrivilege we can change the user to the current user.
3036 3) If we have SeRestorePrivilege we can change the user to any other user.
3037 4) If we have write permission to the file and dos_filemodes is set
3038 then allow chown to the currently authenticated user.
3039 ****************************************************************************/
3041 int try_chown(connection_struct *conn, const char *fname, uid_t uid, gid_t gid)
3047 if(!CAN_WRITE(conn)) {
3052 /* try the direct way first */
3053 ret = SMB_VFS_CHOWN(conn, fname, uid, gid);
3057 /* Case (2) / (3) */
3058 if (lp_enable_privileges()) {
3060 bool has_take_ownership_priv = user_has_privileges(current_user.nt_user_token,
3061 &se_take_ownership);
3062 bool has_restore_priv = user_has_privileges(current_user.nt_user_token,
3066 if ( ( has_take_ownership_priv && ( uid == current_user.ut.uid ) ) ||
3068 ( has_restore_priv ) ) {
3071 /* Keep the current file gid the same - take ownership doesn't imply group change. */
3072 ret = SMB_VFS_CHOWN(conn, fname, uid, (gid_t)-1);
3079 if (!lp_dos_filemode(SNUM(conn))) {
3084 if (SMB_VFS_STAT(conn,fname,&st)) {
3088 if (!NT_STATUS_IS_OK(open_file_fchmod(conn,fname,&st,&fsp))) {
3092 /* only allow chown to the current user. This is more secure,
3093 and also copes with the case where the SID in a take ownership ACL is
3094 a local SID on the users workstation
3096 uid = current_user.ut.uid;
3099 /* Keep the current file gid the same. */
3100 ret = SMB_VFS_FCHOWN(fsp, fsp->fh->fd, uid, (gid_t)-1);
3103 close_file_fchmod(fsp);
3108 static NTSTATUS append_ugw_ace(files_struct *fsp,
3109 SMB_STRUCT_STAT *psbuf,
3121 perms = unix_perms_to_acl_perms(unx_mode,
3125 uid_to_sid(&trustee, psbuf->st_uid );
3128 perms = unix_perms_to_acl_perms(unx_mode,
3132 gid_to_sid(&trustee, psbuf->st_gid );
3135 perms = unix_perms_to_acl_perms(unx_mode,
3139 sid_copy(&trustee, &global_sid_World);
3142 return NT_STATUS_INVALID_PARAMETER;
3144 acc = map_canon_ace_perms(SNUM(fsp->conn),
3154 return NT_STATUS_OK;
3157 /****************************************************************************
3159 ****************************************************************************/
3161 static NTSTATUS append_parent_acl(files_struct *fsp,
3162 SMB_STRUCT_STAT *psbuf,
3164 SEC_DESC **pp_new_sd)
3166 SEC_DESC *parent_sd = NULL;
3167 files_struct *parent_fsp = NULL;
3168 TALLOC_CTX *mem_ctx = talloc_parent(psd);
3169 char *parent_name = NULL;
3170 SEC_ACE *new_ace = NULL;
3171 unsigned int num_aces = psd->dacl->num_aces;
3172 SMB_STRUCT_STAT sbuf;
3180 if (mem_ctx == NULL) {
3181 return NT_STATUS_NO_MEMORY;
3184 if (!parent_dirname_talloc(mem_ctx,
3188 return NT_STATUS_NO_MEMORY;
3191 /* Create a default mode for u/g/w. */
3192 unx_mode = unix_mode(fsp->conn,
3193 aARCH | (fsp->is_directory ? aDIR : 0),
3197 status = open_directory(fsp->conn,
3201 FILE_READ_ATTRIBUTES, /* Just a stat open */
3202 FILE_SHARE_NONE, /* Ignored for stat opens */
3209 if (!NT_STATUS_IS_OK(status)) {
3213 status = SMB_VFS_GET_NT_ACL(parent_fsp, parent_fsp->fsp_name,
3214 DACL_SECURITY_INFORMATION, &parent_sd );
3216 close_file(parent_fsp, NORMAL_CLOSE);
3218 if (!NT_STATUS_IS_OK(status)) {
3223 * Make room for potentially all the ACLs from
3224 * the parent, plus the user/group/other triple.
3227 num_aces += parent_sd->dacl->num_aces + 3;
3229 if((new_ace = TALLOC_ZERO_ARRAY(mem_ctx, SEC_ACE,
3230 num_aces)) == NULL) {
3231 return NT_STATUS_NO_MEMORY;
3234 DEBUG(10,("append_parent_acl: parent ACL has %u entries. New "
3235 "ACL has %u entries\n",
3236 parent_sd->dacl->num_aces, num_aces ));
3238 /* Start by copying in all the given ACE entries. */
3239 for (i = 0; i < psd->dacl->num_aces; i++) {
3240 sec_ace_copy(&new_ace[i], &psd->dacl->aces[i]);
3244 * Note that we're ignoring "inherit permissions" here
3245 * as that really only applies to newly created files. JRA.
3252 status = append_ugw_ace(fsp, psbuf, unx_mode, S_IRUSR, &new_ace[i++]);
3253 if (!NT_STATUS_IS_OK(status)) {
3256 status = append_ugw_ace(fsp, psbuf, unx_mode, S_IRGRP, &new_ace[i++]);
3257 if (!NT_STATUS_IS_OK(status)) {
3260 status = append_ugw_ace(fsp, psbuf, unx_mode, S_IROTH, &new_ace[i++]);
3261 if (!NT_STATUS_IS_OK(status)) {
3265 /* Finally append any inherited ACEs. */
3266 for (j = 0; j < parent_sd->dacl->num_aces; j++) {
3267 SEC_ACE *se = &parent_sd->dacl->aces[j];
3268 uint32 i_flags = se->flags & (SEC_ACE_FLAG_OBJECT_INHERIT|
3269 SEC_ACE_FLAG_CONTAINER_INHERIT|
3270 SEC_ACE_FLAG_INHERIT_ONLY);
3272 if (fsp->is_directory) {
3273 if (i_flags == SEC_ACE_FLAG_OBJECT_INHERIT) {
3274 /* Should only apply to a file - ignore. */
3278 if ((i_flags & (SEC_ACE_FLAG_OBJECT_INHERIT|
3279 SEC_ACE_FLAG_INHERIT_ONLY)) !=
3280 SEC_ACE_FLAG_OBJECT_INHERIT) {
3281 /* Should not apply to a file - ignore. */
3285 sec_ace_copy(&new_ace[i], se);
3286 if (se->flags & SEC_ACE_FLAG_NO_PROPAGATE_INHERIT) {
3287 new_ace[i].flags &= ~(SEC_ACE_FLAG_VALID_INHERIT);
3289 new_ace[i].flags |= SEC_ACE_FLAG_INHERITED_ACE;
3293 parent_sd->dacl->aces = new_ace;
3294 parent_sd->dacl->num_aces = i;
3296 *pp_new_sd = parent_sd;
3300 /****************************************************************************
3301 Reply to set a security descriptor on an fsp. security_info_sent is the
3302 description of the following NT ACL.
3303 This should be the only external function needed for the UNIX style set ACL.
3304 ****************************************************************************/
3306 NTSTATUS set_nt_acl(files_struct *fsp, uint32 security_info_sent, SEC_DESC *psd)
3308 connection_struct *conn = fsp->conn;
3309 uid_t user = (uid_t)-1;
3310 gid_t grp = (gid_t)-1;
3311 SMB_STRUCT_STAT sbuf;
3312 DOM_SID file_owner_sid;
3313 DOM_SID file_grp_sid;
3314 canon_ace *file_ace_list = NULL;
3315 canon_ace *dir_ace_list = NULL;
3316 bool acl_perms = False;
3317 mode_t orig_mode = (mode_t)0;
3320 DEBUG(10,("set_nt_acl: called for file %s\n", fsp->fsp_name ));
3322 if (!CAN_WRITE(conn)) {
3323 DEBUG(10,("set acl rejected on read-only share\n"));
3324 return NT_STATUS_MEDIA_WRITE_PROTECTED;
3328 * Get the current state of the file.
3331 if(fsp->is_directory || fsp->fh->fd == -1) {
3332 if(SMB_VFS_STAT(fsp->conn,fsp->fsp_name, &sbuf) != 0)
3333 return map_nt_error_from_unix(errno);
3335 if(SMB_VFS_FSTAT(fsp,fsp->fh->fd,&sbuf) != 0)
3336 return map_nt_error_from_unix(errno);
3339 /* Save the original elements we check against. */
3340 orig_mode = sbuf.st_mode;
3343 * Unpack the user/group/world id's.
3346 status = unpack_nt_owners( SNUM(conn), &user, &grp, security_info_sent, psd);
3347 if (!NT_STATUS_IS_OK(status)) {
3352 * Do we need to chown ?
3355 if (((user != (uid_t)-1) && (sbuf.st_uid != user)) || (( grp != (gid_t)-1) && (sbuf.st_gid != grp))) {
3357 DEBUG(3,("set_nt_acl: chown %s. uid = %u, gid = %u.\n",
3358 fsp->fsp_name, (unsigned int)user, (unsigned int)grp ));
3360 if(try_chown( fsp->conn, fsp->fsp_name, user, grp) == -1) {
3361 DEBUG(3,("set_nt_acl: chown %s, %u, %u failed. Error = %s.\n",
3362 fsp->fsp_name, (unsigned int)user, (unsigned int)grp, strerror(errno) ));
3363 if (errno == EPERM) {
3364 return NT_STATUS_INVALID_OWNER;
3366 return map_nt_error_from_unix(errno);
3370 * Recheck the current state of the file, which may have changed.
3371 * (suid/sgid bits, for instance)
3374 if(fsp->is_directory) {
3375 if(SMB_VFS_STAT(fsp->conn, fsp->fsp_name, &sbuf) != 0) {
3376 return map_nt_error_from_unix(errno);
3382 if(fsp->fh->fd == -1)
3383 ret = SMB_VFS_STAT(fsp->conn, fsp->fsp_name, &sbuf);
3385 ret = SMB_VFS_FSTAT(fsp,fsp->fh->fd,&sbuf);
3388 return map_nt_error_from_unix(errno);
3391 /* Save the original elements we check against. */
3392 orig_mode = sbuf.st_mode;
3395 create_file_sids(&sbuf, &file_owner_sid, &file_grp_sid);
3397 if ((security_info_sent & DACL_SECURITY_INFORMATION) &&
3398 psd->dacl != NULL &&
3399 (psd->type & (SE_DESC_DACL_AUTO_INHERITED|
3400 SE_DESC_DACL_AUTO_INHERIT_REQ))==
3401 (SE_DESC_DACL_AUTO_INHERITED|
3402 SE_DESC_DACL_AUTO_INHERIT_REQ) ) {
3403 status = append_parent_acl(fsp, &sbuf, psd, &psd);
3404 if (!NT_STATUS_IS_OK(status)) {
3409 acl_perms = unpack_canon_ace( fsp, &sbuf, &file_owner_sid, &file_grp_sid,
3410 &file_ace_list, &dir_ace_list, security_info_sent, psd);
3412 /* Ignore W2K traverse DACL set. */
3413 if (file_ace_list || dir_ace_list) {
3416 DEBUG(3,("set_nt_acl: cannot set permissions\n"));
3417 free_canon_ace_list(file_ace_list);
3418 free_canon_ace_list(dir_ace_list);
3419 return NT_STATUS_ACCESS_DENIED;
3423 * Only change security if we got a DACL.
3426 if((security_info_sent & DACL_SECURITY_INFORMATION) && (psd->dacl != NULL)) {
3428 bool acl_set_support = False;
3432 * Try using the POSIX ACL set first. Fall back to chmod if
3433 * we have no ACL support on this filesystem.
3436 if (acl_perms && file_ace_list) {
3437 ret = set_canon_ace_list(fsp, file_ace_list, False, sbuf.st_gid, &acl_set_support);
3438 if (acl_set_support && ret == False) {
3439 DEBUG(3,("set_nt_acl: failed to set file acl on file %s (%s).\n", fsp->fsp_name, strerror(errno) ));
3440 free_canon_ace_list(file_ace_list);
3441 free_canon_ace_list(dir_ace_list);
3442 return map_nt_error_from_unix(errno);
3446 if (acl_perms && acl_set_support && fsp->is_directory) {
3448 if (!set_canon_ace_list(fsp, dir_ace_list, True, sbuf.st_gid, &acl_set_support)) {
3449 DEBUG(3,("set_nt_acl: failed to set default acl on directory %s (%s).\n", fsp->fsp_name, strerror(errno) ));
3450 free_canon_ace_list(file_ace_list);
3451 free_canon_ace_list(dir_ace_list);
3452 return map_nt_error_from_unix(errno);
3457 * No default ACL - delete one if it exists.
3460 if (SMB_VFS_SYS_ACL_DELETE_DEF_FILE(conn, fsp->fsp_name) == -1) {
3463 if (acl_group_override(conn, sbuf.st_gid)) {
3464 DEBUG(5,("set_nt_acl: acl group control on and "
3465 "current user in file %s primary group. Override delete_def_acl\n",
3469 sret = SMB_VFS_SYS_ACL_DELETE_DEF_FILE(conn, fsp->fsp_name);
3474 DEBUG(3,("set_nt_acl: sys_acl_delete_def_file failed (%s)\n", strerror(errno)));
3475 free_canon_ace_list(file_ace_list);
3476 free_canon_ace_list(dir_ace_list);
3477 return map_nt_error_from_unix(errno);
3483 if (acl_set_support) {
3484 store_inheritance_attributes(fsp, file_ace_list, dir_ace_list,
3485 (psd->type & SE_DESC_DACL_PROTECTED) ? True : False);
3489 * If we cannot set using POSIX ACLs we fall back to checking if we need to chmod.
3492 if(!acl_set_support && acl_perms) {
3495 if (!convert_canon_ace_to_posix_perms( fsp, file_ace_list, &posix_perms)) {
3496 free_canon_ace_list(file_ace_list);
3497 free_canon_ace_list(dir_ace_list);
3498 DEBUG(3,("set_nt_acl: failed to convert file acl to posix permissions for file %s.\n",
3500 return NT_STATUS_ACCESS_DENIED;
3503 if (orig_mode != posix_perms) {
3505 DEBUG(3,("set_nt_acl: chmod %s. perms = 0%o.\n",
3506 fsp->fsp_name, (unsigned int)posix_perms ));
3508 if(SMB_VFS_CHMOD(conn,fsp->fsp_name, posix_perms) == -1) {
3510 if (acl_group_override(conn, sbuf.st_gid)) {
3511 DEBUG(5,("set_nt_acl: acl group control on and "
3512 "current user in file %s primary group. Override chmod\n",
3516 sret = SMB_VFS_CHMOD(conn,fsp->fsp_name, posix_perms);
3521 DEBUG(3,("set_nt_acl: chmod %s, 0%o failed. Error = %s.\n",
3522 fsp->fsp_name, (unsigned int)posix_perms, strerror(errno) ));
3523 free_canon_ace_list(file_ace_list);
3524 free_canon_ace_list(dir_ace_list);
3525 return map_nt_error_from_unix(errno);
3532 free_canon_ace_list(file_ace_list);
3533 free_canon_ace_list(dir_ace_list);
3536 return NT_STATUS_OK;
3539 /****************************************************************************
3540 Get the actual group bits stored on a file with an ACL. Has no effect if
3541 the file has no ACL. Needed in dosmode code where the stat() will return
3542 the mask bits, not the real group bits, for a file with an ACL.
3543 ****************************************************************************/
3545 int get_acl_group_bits( connection_struct *conn, const char *fname, mode_t *mode )
3547 int entry_id = SMB_ACL_FIRST_ENTRY;
3548 SMB_ACL_ENTRY_T entry;
3549 SMB_ACL_T posix_acl;
3552 posix_acl = SMB_VFS_SYS_ACL_GET_FILE(conn, fname, SMB_ACL_TYPE_ACCESS);
3553 if (posix_acl == (SMB_ACL_T)NULL)
3556 while (SMB_VFS_SYS_ACL_GET_ENTRY(conn, posix_acl, entry_id, &entry) == 1) {
3557 SMB_ACL_TAG_T tagtype;
3558 SMB_ACL_PERMSET_T permset;
3561 if (entry_id == SMB_ACL_FIRST_ENTRY)
3562 entry_id = SMB_ACL_NEXT_ENTRY;
3564 if (SMB_VFS_SYS_ACL_GET_TAG_TYPE(conn, entry, &tagtype) ==-1)
3567 if (tagtype == SMB_ACL_GROUP_OBJ) {
3568 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, entry, &permset) == -1) {
3571 *mode &= ~(S_IRGRP|S_IWGRP|S_IXGRP);
3572 *mode |= (SMB_VFS_SYS_ACL_GET_PERM(conn, permset, SMB_ACL_READ) ? S_IRGRP : 0);
3573 *mode |= (SMB_VFS_SYS_ACL_GET_PERM(conn, permset, SMB_ACL_WRITE) ? S_IWGRP : 0);
3574 *mode |= (SMB_VFS_SYS_ACL_GET_PERM(conn, permset, SMB_ACL_EXECUTE) ? S_IXGRP : 0);
3580 SMB_VFS_SYS_ACL_FREE_ACL(conn, posix_acl);
3584 /****************************************************************************
3585 Do a chmod by setting the ACL USER_OBJ, GROUP_OBJ and OTHER bits in an ACL
3586 and set the mask to rwx. Needed to preserve complex ACLs set by NT.
3587 ****************************************************************************/
3589 static int chmod_acl_internals( connection_struct *conn, SMB_ACL_T posix_acl, mode_t mode)
3591 int entry_id = SMB_ACL_FIRST_ENTRY;
3592 SMB_ACL_ENTRY_T entry;
3593 int num_entries = 0;
3595 while ( SMB_VFS_SYS_ACL_GET_ENTRY(conn, posix_acl, entry_id, &entry) == 1) {
3596 SMB_ACL_TAG_T tagtype;
3597 SMB_ACL_PERMSET_T permset;
3601 if (entry_id == SMB_ACL_FIRST_ENTRY)
3602 entry_id = SMB_ACL_NEXT_ENTRY;
3604 if (SMB_VFS_SYS_ACL_GET_TAG_TYPE(conn, entry, &tagtype) == -1)
3607 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, entry, &permset) == -1)
3613 case SMB_ACL_USER_OBJ:
3614 perms = unix_perms_to_acl_perms(mode, S_IRUSR, S_IWUSR, S_IXUSR);
3616 case SMB_ACL_GROUP_OBJ:
3617 perms = unix_perms_to_acl_perms(mode, S_IRGRP, S_IWGRP, S_IXGRP);
3621 * FIXME: The ACL_MASK entry permissions should really be set to
3622 * the union of the permissions of all ACL_USER,
3623 * ACL_GROUP_OBJ, and ACL_GROUP entries. That's what
3624 * acl_calc_mask() does, but Samba ACLs doesn't provide it.
3626 perms = S_IRUSR|S_IWUSR|S_IXUSR;
3629 perms = unix_perms_to_acl_perms(mode, S_IROTH, S_IWOTH, S_IXOTH);
3635 if (map_acl_perms_to_permset(conn, perms, &permset) == -1)
3638 if (SMB_VFS_SYS_ACL_SET_PERMSET(conn, entry, permset) == -1)
3643 * If this is a simple 3 element ACL or no elements then it's a standard
3644 * UNIX permission set. Just use chmod...
3647 if ((num_entries == 3) || (num_entries == 0))
3653 /****************************************************************************
3654 Get the access ACL of FROM, do a chmod by setting the ACL USER_OBJ,
3655 GROUP_OBJ and OTHER bits in an ACL and set the mask to rwx. Set the
3656 resulting ACL on TO. Note that name is in UNIX character set.
3657 ****************************************************************************/
3659 static int copy_access_acl(connection_struct *conn, const char *from, const char *to, mode_t mode)
3661 SMB_ACL_T posix_acl = NULL;
3664 if ((posix_acl = SMB_VFS_SYS_ACL_GET_FILE(conn, from, SMB_ACL_TYPE_ACCESS)) == NULL)
3667 if ((ret = chmod_acl_internals(conn, posix_acl, mode)) == -1)
3670 ret = SMB_VFS_SYS_ACL_SET_FILE(conn, to, SMB_ACL_TYPE_ACCESS, posix_acl);
3674 SMB_VFS_SYS_ACL_FREE_ACL(conn, posix_acl);
3678 /****************************************************************************
3679 Do a chmod by setting the ACL USER_OBJ, GROUP_OBJ and OTHER bits in an ACL
3680 and set the mask to rwx. Needed to preserve complex ACLs set by NT.
3681 Note that name is in UNIX character set.
3682 ****************************************************************************/
3684 int chmod_acl(connection_struct *conn, const char *name, mode_t mode)
3686 return copy_access_acl(conn, name, name, mode);
3689 /****************************************************************************
3690 If the parent directory has no default ACL but it does have an Access ACL,
3691 inherit this Access ACL to file name.
3692 ****************************************************************************/
3694 int inherit_access_acl(connection_struct *conn, const char *inherit_from_dir,
3695 const char *name, mode_t mode)
3697 if (directory_has_default_acl(conn, inherit_from_dir))
3700 return copy_access_acl(conn, inherit_from_dir, name, mode);
3703 /****************************************************************************
3704 Do an fchmod by setting the ACL USER_OBJ, GROUP_OBJ and OTHER bits in an ACL
3705 and set the mask to rwx. Needed to preserve complex ACLs set by NT.
3706 ****************************************************************************/
3708 int fchmod_acl(files_struct *fsp, int fd, mode_t mode)
3710 connection_struct *conn = fsp->conn;
3711 SMB_ACL_T posix_acl = NULL;
3714 if ((posix_acl = SMB_VFS_SYS_ACL_GET_FD(fsp, fd)) == NULL)
3717 if ((ret = chmod_acl_internals(conn, posix_acl, mode)) == -1)
3720 ret = SMB_VFS_SYS_ACL_SET_FD(fsp, fd, posix_acl);
3724 SMB_VFS_SYS_ACL_FREE_ACL(conn, posix_acl);
3728 /****************************************************************************
3729 Check for an existing default POSIX ACL on a directory.
3730 ****************************************************************************/
3732 bool directory_has_default_acl(connection_struct *conn, const char *fname)
3734 SMB_ACL_T def_acl = SMB_VFS_SYS_ACL_GET_FILE( conn, fname, SMB_ACL_TYPE_DEFAULT);
3735 bool has_acl = False;
3736 SMB_ACL_ENTRY_T entry;
3738 if (def_acl != NULL && (SMB_VFS_SYS_ACL_GET_ENTRY(conn, def_acl, SMB_ACL_FIRST_ENTRY, &entry) == 1)) {
3743 SMB_VFS_SYS_ACL_FREE_ACL(conn, def_acl);
3748 /****************************************************************************
3749 Map from wire type to permset.
3750 ****************************************************************************/
3752 static bool unix_ex_wire_to_permset(connection_struct *conn, unsigned char wire_perm, SMB_ACL_PERMSET_T *p_permset)
3754 if (wire_perm & ~(SMB_POSIX_ACL_READ|SMB_POSIX_ACL_WRITE|SMB_POSIX_ACL_EXECUTE)) {
3758 if (SMB_VFS_SYS_ACL_CLEAR_PERMS(conn, *p_permset) == -1) {
3762 if (wire_perm & SMB_POSIX_ACL_READ) {
3763 if (SMB_VFS_SYS_ACL_ADD_PERM(conn, *p_permset, SMB_ACL_READ) == -1) {
3767 if (wire_perm & SMB_POSIX_ACL_WRITE) {
3768 if (SMB_VFS_SYS_ACL_ADD_PERM(conn, *p_permset, SMB_ACL_WRITE) == -1) {
3772 if (wire_perm & SMB_POSIX_ACL_EXECUTE) {
3773 if (SMB_VFS_SYS_ACL_ADD_PERM(conn, *p_permset, SMB_ACL_EXECUTE) == -1) {
3780 /****************************************************************************
3781 Map from wire type to tagtype.
3782 ****************************************************************************/
3784 static bool unix_ex_wire_to_tagtype(unsigned char wire_tt, SMB_ACL_TAG_T *p_tt)
3787 case SMB_POSIX_ACL_USER_OBJ:
3788 *p_tt = SMB_ACL_USER_OBJ;
3790 case SMB_POSIX_ACL_USER:
3791 *p_tt = SMB_ACL_USER;
3793 case SMB_POSIX_ACL_GROUP_OBJ:
3794 *p_tt = SMB_ACL_GROUP_OBJ;
3796 case SMB_POSIX_ACL_GROUP:
3797 *p_tt = SMB_ACL_GROUP;
3799 case SMB_POSIX_ACL_MASK:
3800 *p_tt = SMB_ACL_MASK;
3802 case SMB_POSIX_ACL_OTHER:
3803 *p_tt = SMB_ACL_OTHER;
3811 /****************************************************************************
3812 Create a new POSIX acl from wire permissions.
3813 FIXME ! How does the share mask/mode fit into this.... ?
3814 ****************************************************************************/
3816 static SMB_ACL_T create_posix_acl_from_wire(connection_struct *conn, uint16 num_acls, const char *pdata)
3819 SMB_ACL_T the_acl = SMB_VFS_SYS_ACL_INIT(conn, num_acls);
3821 if (the_acl == NULL) {
3825 for (i = 0; i < num_acls; i++) {
3826 SMB_ACL_ENTRY_T the_entry;
3827 SMB_ACL_PERMSET_T the_permset;
3828 SMB_ACL_TAG_T tag_type;
3830 if (SMB_VFS_SYS_ACL_CREATE_ENTRY(conn, &the_acl, &the_entry) == -1) {
3831 DEBUG(0,("create_posix_acl_from_wire: Failed to create entry %u. (%s)\n",
3832 i, strerror(errno) ));
3836 if (!unix_ex_wire_to_tagtype(CVAL(pdata,(i*SMB_POSIX_ACL_ENTRY_SIZE)), &tag_type)) {
3837 DEBUG(0,("create_posix_acl_from_wire: invalid wire tagtype %u on entry %u.\n",
3838 CVAL(pdata,(i*SMB_POSIX_ACL_ENTRY_SIZE)), i ));
3842 if (SMB_VFS_SYS_ACL_SET_TAG_TYPE(conn, the_entry, tag_type) == -1) {
3843 DEBUG(0,("create_posix_acl_from_wire: Failed to set tagtype on entry %u. (%s)\n",
3844 i, strerror(errno) ));
3848 /* Get the permset pointer from the new ACL entry. */
3849 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, the_entry, &the_permset) == -1) {
3850 DEBUG(0,("create_posix_acl_from_wire: Failed to get permset on entry %u. (%s)\n",
3851 i, strerror(errno) ));
3855 /* Map from wire to permissions. */
3856 if (!unix_ex_wire_to_permset(conn, CVAL(pdata,(i*SMB_POSIX_ACL_ENTRY_SIZE)+1), &the_permset)) {
3857 DEBUG(0,("create_posix_acl_from_wire: invalid permset %u on entry %u.\n",
3858 CVAL(pdata,(i*SMB_POSIX_ACL_ENTRY_SIZE) + 1), i ));
3862 /* Now apply to the new ACL entry. */
3863 if (SMB_VFS_SYS_ACL_SET_PERMSET(conn, the_entry, the_permset) == -1) {
3864 DEBUG(0,("create_posix_acl_from_wire: Failed to add permset on entry %u. (%s)\n",
3865 i, strerror(errno) ));
3869 if (tag_type == SMB_ACL_USER) {
3870 uint32 uidval = IVAL(pdata,(i*SMB_POSIX_ACL_ENTRY_SIZE)+2);
3871 uid_t uid = (uid_t)uidval;
3872 if (SMB_VFS_SYS_ACL_SET_QUALIFIER(conn, the_entry,(void *)&uid) == -1) {
3873 DEBUG(0,("create_posix_acl_from_wire: Failed to set uid %u on entry %u. (%s)\n",
3874 (unsigned int)uid, i, strerror(errno) ));
3879 if (tag_type == SMB_ACL_GROUP) {
3880 uint32 gidval = IVAL(pdata,(i*SMB_POSIX_ACL_ENTRY_SIZE)+2);
3881 gid_t gid = (uid_t)gidval;
3882 if (SMB_VFS_SYS_ACL_SET_QUALIFIER(conn, the_entry,(void *)&gid) == -1) {
3883 DEBUG(0,("create_posix_acl_from_wire: Failed to set gid %u on entry %u. (%s)\n",
3884 (unsigned int)gid, i, strerror(errno) ));
3894 if (the_acl != NULL) {
3895 SMB_VFS_SYS_ACL_FREE_ACL(conn, the_acl);
3900 /****************************************************************************
3901 Calls from UNIX extensions - Default POSIX ACL set.
3902 If num_def_acls == 0 and not a directory just return. If it is a directory
3903 and num_def_acls == 0 then remove the default acl. Else set the default acl
3905 ****************************************************************************/
3907 bool set_unix_posix_default_acl(connection_struct *conn, const char *fname, SMB_STRUCT_STAT *psbuf,
3908 uint16 num_def_acls, const char *pdata)
3910 SMB_ACL_T def_acl = NULL;
3912 if (num_def_acls && !S_ISDIR(psbuf->st_mode)) {
3913 DEBUG(5,("set_unix_posix_default_acl: Can't set default ACL on non-directory file %s\n", fname ));
3918 if (!num_def_acls) {
3919 /* Remove the default ACL. */
3920 if (SMB_VFS_SYS_ACL_DELETE_DEF_FILE(conn, fname) == -1) {
3921 DEBUG(5,("set_unix_posix_default_acl: acl_delete_def_file failed on directory %s (%s)\n",
3922 fname, strerror(errno) ));
3928 if ((def_acl = create_posix_acl_from_wire(conn, num_def_acls, pdata)) == NULL) {
3932 if (SMB_VFS_SYS_ACL_SET_FILE(conn, fname, SMB_ACL_TYPE_DEFAULT, def_acl) == -1) {
3933 DEBUG(5,("set_unix_posix_default_acl: acl_set_file failed on directory %s (%s)\n",
3934 fname, strerror(errno) ));
3935 SMB_VFS_SYS_ACL_FREE_ACL(conn, def_acl);
3939 DEBUG(10,("set_unix_posix_default_acl: set default acl for file %s\n", fname ));
3940 SMB_VFS_SYS_ACL_FREE_ACL(conn, def_acl);
3944 /****************************************************************************
3945 Remove an ACL from a file. As we don't have acl_delete_entry() available
3946 we must read the current acl and copy all entries except MASK, USER and GROUP
3947 to a new acl, then set that. This (at least on Linux) causes any ACL to be
3949 FIXME ! How does the share mask/mode fit into this.... ?
3950 ****************************************************************************/
3952 static bool remove_posix_acl(connection_struct *conn, files_struct *fsp, const char *fname)
3954 SMB_ACL_T file_acl = NULL;
3955 int entry_id = SMB_ACL_FIRST_ENTRY;
3956 SMB_ACL_ENTRY_T entry;
3958 /* Create a new ACL with only 3 entries, u/g/w. */
3959 SMB_ACL_T new_file_acl = SMB_VFS_SYS_ACL_INIT(conn, 3);
3960 SMB_ACL_ENTRY_T user_ent = NULL;
3961 SMB_ACL_ENTRY_T group_ent = NULL;
3962 SMB_ACL_ENTRY_T other_ent = NULL;
3964 if (new_file_acl == NULL) {
3965 DEBUG(5,("remove_posix_acl: failed to init new ACL with 3 entries for file %s.\n", fname));
3969 /* Now create the u/g/w entries. */
3970 if (SMB_VFS_SYS_ACL_CREATE_ENTRY(conn, &new_file_acl, &user_ent) == -1) {
3971 DEBUG(5,("remove_posix_acl: Failed to create user entry for file %s. (%s)\n",
3972 fname, strerror(errno) ));
3975 if (SMB_VFS_SYS_ACL_SET_TAG_TYPE(conn, user_ent, SMB_ACL_USER_OBJ) == -1) {
3976 DEBUG(5,("remove_posix_acl: Failed to set user entry for file %s. (%s)\n",
3977 fname, strerror(errno) ));
3981 if (SMB_VFS_SYS_ACL_CREATE_ENTRY(conn, &new_file_acl, &group_ent) == -1) {
3982 DEBUG(5,("remove_posix_acl: Failed to create group entry for file %s. (%s)\n",
3983 fname, strerror(errno) ));
3986 if (SMB_VFS_SYS_ACL_SET_TAG_TYPE(conn, group_ent, SMB_ACL_GROUP_OBJ) == -1) {
3987 DEBUG(5,("remove_posix_acl: Failed to set group entry for file %s. (%s)\n",
3988 fname, strerror(errno) ));
3992 if (SMB_VFS_SYS_ACL_CREATE_ENTRY(conn, &new_file_acl, &other_ent) == -1) {
3993 DEBUG(5,("remove_posix_acl: Failed to create other entry for file %s. (%s)\n",
3994 fname, strerror(errno) ));
3997 if (SMB_VFS_SYS_ACL_SET_TAG_TYPE(conn, other_ent, SMB_ACL_OTHER) == -1) {
3998 DEBUG(5,("remove_posix_acl: Failed to set other entry for file %s. (%s)\n",
3999 fname, strerror(errno) ));
4003 /* Get the current file ACL. */
4004 if (fsp && fsp->fh->fd != -1) {
4005 file_acl = SMB_VFS_SYS_ACL_GET_FD(fsp, fsp->fh->fd);
4007 file_acl = SMB_VFS_SYS_ACL_GET_FILE( conn, fname, SMB_ACL_TYPE_ACCESS);
4010 if (file_acl == NULL) {
4011 /* This is only returned if an error occurred. Even for a file with
4012 no acl a u/g/w acl should be returned. */
4013 DEBUG(5,("remove_posix_acl: failed to get ACL from file %s (%s).\n",
4014 fname, strerror(errno) ));
4018 while ( SMB_VFS_SYS_ACL_GET_ENTRY(conn, file_acl, entry_id, &entry) == 1) {
4019 SMB_ACL_TAG_T tagtype;
4020 SMB_ACL_PERMSET_T permset;
4023 if (entry_id == SMB_ACL_FIRST_ENTRY)
4024 entry_id = SMB_ACL_NEXT_ENTRY;
4026 if (SMB_VFS_SYS_ACL_GET_TAG_TYPE(conn, entry, &tagtype) == -1) {
4027 DEBUG(5,("remove_posix_acl: failed to get tagtype from ACL on file %s (%s).\n",
4028 fname, strerror(errno) ));
4032 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, entry, &permset) == -1) {
4033 DEBUG(5,("remove_posix_acl: failed to get permset from ACL on file %s (%s).\n",
4034 fname, strerror(errno) ));
4038 if (tagtype == SMB_ACL_USER_OBJ) {
4039 if (SMB_VFS_SYS_ACL_SET_PERMSET(conn, user_ent, permset) == -1) {
4040 DEBUG(5,("remove_posix_acl: failed to set permset from ACL on file %s (%s).\n",
4041 fname, strerror(errno) ));
4043 } else if (tagtype == SMB_ACL_GROUP_OBJ) {
4044 if (SMB_VFS_SYS_ACL_SET_PERMSET(conn, group_ent, permset) == -1) {
4045 DEBUG(5,("remove_posix_acl: failed to set permset from ACL on file %s (%s).\n",
4046 fname, strerror(errno) ));
4048 } else if (tagtype == SMB_ACL_OTHER) {
4049 if (SMB_VFS_SYS_ACL_SET_PERMSET(conn, other_ent, permset) == -1) {
4050 DEBUG(5,("remove_posix_acl: failed to set permset from ACL on file %s (%s).\n",
4051 fname, strerror(errno) ));
4056 /* Set the new empty file ACL. */
4057 if (fsp && fsp->fh->fd != -1) {
4058 if (SMB_VFS_SYS_ACL_SET_FD(fsp, fsp->fh->fd, new_file_acl) == -1) {
4059 DEBUG(5,("remove_posix_acl: acl_set_file failed on %s (%s)\n",
4060 fname, strerror(errno) ));
4064 if (SMB_VFS_SYS_ACL_SET_FILE(conn, fname, SMB_ACL_TYPE_ACCESS, new_file_acl) == -1) {
4065 DEBUG(5,("remove_posix_acl: acl_set_file failed on %s (%s)\n",
4066 fname, strerror(errno) ));
4076 SMB_VFS_SYS_ACL_FREE_ACL(conn, file_acl);
4079 SMB_VFS_SYS_ACL_FREE_ACL(conn, new_file_acl);
4084 /****************************************************************************
4085 Calls from UNIX extensions - POSIX ACL set.
4086 If num_def_acls == 0 then read/modify/write acl after removing all entries
4087 except SMB_ACL_USER_OBJ, SMB_ACL_GROUP_OBJ, SMB_ACL_OTHER.
4088 ****************************************************************************/
4090 bool set_unix_posix_acl(connection_struct *conn, files_struct *fsp, const char *fname, uint16 num_acls, const char *pdata)
4092 SMB_ACL_T file_acl = NULL;
4095 /* Remove the ACL from the file. */
4096 return remove_posix_acl(conn, fsp, fname);
4099 if ((file_acl = create_posix_acl_from_wire(conn, num_acls, pdata)) == NULL) {
4103 if (fsp && fsp->fh->fd != -1) {
4104 /* The preferred way - use an open fd. */
4105 if (SMB_VFS_SYS_ACL_SET_FD(fsp, fsp->fh->fd, file_acl) == -1) {
4106 DEBUG(5,("set_unix_posix_acl: acl_set_file failed on %s (%s)\n",
4107 fname, strerror(errno) ));
4108 SMB_VFS_SYS_ACL_FREE_ACL(conn, file_acl);
4112 if (SMB_VFS_SYS_ACL_SET_FILE(conn, fname, SMB_ACL_TYPE_ACCESS, file_acl) == -1) {
4113 DEBUG(5,("set_unix_posix_acl: acl_set_file failed on %s (%s)\n",
4114 fname, strerror(errno) ));
4115 SMB_VFS_SYS_ACL_FREE_ACL(conn, file_acl);
4120 DEBUG(10,("set_unix_posix_acl: set acl for file %s\n", fname ));
4121 SMB_VFS_SYS_ACL_FREE_ACL(conn, file_acl);
4125 /********************************************************************
4126 Pull the NT ACL from a file on disk or the OpenEventlog() access
4127 check. Caller is responsible for freeing the returned security
4128 descriptor via TALLOC_FREE(). This is designed for dealing with
4129 user space access checks in smbd outside of the VFS. For example,
4130 checking access rights in OpenEventlog().
4132 Assume we are dealing with files (for now)
4133 ********************************************************************/
4135 SEC_DESC *get_nt_acl_no_snum( TALLOC_CTX *ctx, const char *fname)
4137 SEC_DESC *psd, *ret_sd;
4138 connection_struct conn;
4140 struct fd_handle fh;
4142 ZERO_STRUCT( conn );
4144 if ( !(conn.mem_ctx = talloc_init( "novfs_get_nt_acl" )) ) {
4145 DEBUG(0,("get_nt_acl_no_snum: talloc() failed!\n"));
4149 if (!(conn.params = TALLOC_P(conn.mem_ctx, struct share_params))) {
4150 DEBUG(0,("get_nt_acl_no_snum: talloc() failed!\n"));
4151 TALLOC_FREE(conn.mem_ctx);
4155 conn.params->service = -1;
4157 set_conn_connectpath(&conn, "/");
4159 if (!smbd_vfs_init(&conn)) {
4160 DEBUG(0,("get_nt_acl_no_snum: Unable to create a fake connection struct!\n"));
4161 conn_free_internal( &conn );
4165 ZERO_STRUCT( finfo );
4172 finfo.fsp_name = CONST_DISCARD(char *,fname);
4174 if (!NT_STATUS_IS_OK(get_nt_acl( &finfo, DACL_SECURITY_INFORMATION,
4176 DEBUG(0,("get_nt_acl_no_snum: get_nt_acl returned zero.\n"));
4177 conn_free_internal( &conn );
4181 ret_sd = dup_sec_desc( ctx, psd );
4183 conn_free_internal( &conn );