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, 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, 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 *fload_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, 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 Load the user.SAMBA_PAI attribute.
495 ************************************************************************/
497 static struct pai_val *load_inherited_info(const struct connection_struct *conn,
501 size_t pai_buf_size = 1024;
502 struct pai_val *paiv = NULL;
505 if (!lp_map_acl_inherit(SNUM(conn))) {
509 if ((pai_buf = (char *)SMB_MALLOC(pai_buf_size)) == NULL) {
514 ret = SMB_VFS_GETXATTR(conn, fname,
515 SAMBA_POSIX_INHERITANCE_EA_NAME,
516 pai_buf, pai_buf_size);
519 if (errno != ERANGE) {
522 /* Buffer too small - enlarge it. */
525 if (pai_buf_size > 1024*1024) {
526 return NULL; /* Limit malloc to 1mb. */
528 if ((pai_buf = (char *)SMB_MALLOC(pai_buf_size)) == NULL)
533 DEBUG(10,("load_inherited_info: ret = %lu for file %s\n", (unsigned long)ret, fname));
536 /* No attribute or not supported. */
538 if (errno != ENOATTR)
539 DEBUG(10,("load_inherited_info: Error %s\n", strerror(errno) ));
542 DEBUG(10,("load_inherited_info: Error %s\n", strerror(errno) ));
548 paiv = create_pai_val(pai_buf, ret);
550 if (paiv && paiv->pai_protected) {
551 DEBUG(10,("load_inherited_info: ACL is protected for file %s\n", fname));
558 /****************************************************************************
559 Functions to manipulate the internal ACE format.
560 ****************************************************************************/
562 /****************************************************************************
563 Count a linked list of canonical ACE entries.
564 ****************************************************************************/
566 static size_t count_canon_ace_list( canon_ace *list_head )
571 for (ace = list_head; ace; ace = ace->next)
577 /****************************************************************************
578 Free a linked list of canonical ACE entries.
579 ****************************************************************************/
581 static void free_canon_ace_list( canon_ace *list_head )
583 canon_ace *list, *next;
585 for (list = list_head; list; list = next) {
587 DLIST_REMOVE(list_head, list);
592 /****************************************************************************
593 Function to duplicate a canon_ace entry.
594 ****************************************************************************/
596 static canon_ace *dup_canon_ace( canon_ace *src_ace)
598 canon_ace *dst_ace = SMB_MALLOC_P(canon_ace);
604 dst_ace->prev = dst_ace->next = NULL;
608 /****************************************************************************
609 Print out a canon ace.
610 ****************************************************************************/
612 static void print_canon_ace(canon_ace *pace, int num)
614 dbgtext( "canon_ace index %d. Type = %s ", num, pace->attr == ALLOW_ACE ? "allow" : "deny" );
615 dbgtext( "SID = %s ", sid_string_dbg(&pace->trustee));
616 if (pace->owner_type == UID_ACE) {
617 const char *u_name = uidtoname(pace->unix_ug.uid);
618 dbgtext( "uid %u (%s) ", (unsigned int)pace->unix_ug.uid, u_name );
619 } else if (pace->owner_type == GID_ACE) {
620 char *g_name = gidtoname(pace->unix_ug.gid);
621 dbgtext( "gid %u (%s) ", (unsigned int)pace->unix_ug.gid, g_name );
624 switch (pace->type) {
626 dbgtext( "SMB_ACL_USER ");
628 case SMB_ACL_USER_OBJ:
629 dbgtext( "SMB_ACL_USER_OBJ ");
632 dbgtext( "SMB_ACL_GROUP ");
634 case SMB_ACL_GROUP_OBJ:
635 dbgtext( "SMB_ACL_GROUP_OBJ ");
638 dbgtext( "SMB_ACL_OTHER ");
645 dbgtext( "(inherited) ");
647 dbgtext( "%c", pace->perms & S_IRUSR ? 'r' : '-');
648 dbgtext( "%c", pace->perms & S_IWUSR ? 'w' : '-');
649 dbgtext( "%c\n", pace->perms & S_IXUSR ? 'x' : '-');
652 /****************************************************************************
653 Print out a canon ace list.
654 ****************************************************************************/
656 static void print_canon_ace_list(const char *name, canon_ace *ace_list)
660 if( DEBUGLVL( 10 )) {
661 dbgtext( "print_canon_ace_list: %s\n", name );
662 for (;ace_list; ace_list = ace_list->next, count++)
663 print_canon_ace(ace_list, count );
667 /****************************************************************************
668 Map POSIX ACL perms to canon_ace permissions (a mode_t containing only S_(R|W|X)USR bits).
669 ****************************************************************************/
671 static mode_t convert_permset_to_mode_t(connection_struct *conn, SMB_ACL_PERMSET_T permset)
675 ret |= (SMB_VFS_SYS_ACL_GET_PERM(conn, permset, SMB_ACL_READ) ? S_IRUSR : 0);
676 ret |= (SMB_VFS_SYS_ACL_GET_PERM(conn, permset, SMB_ACL_WRITE) ? S_IWUSR : 0);
677 ret |= (SMB_VFS_SYS_ACL_GET_PERM(conn, permset, SMB_ACL_EXECUTE) ? S_IXUSR : 0);
682 /****************************************************************************
683 Map generic UNIX permissions to canon_ace permissions (a mode_t containing only S_(R|W|X)USR bits).
684 ****************************************************************************/
686 static mode_t unix_perms_to_acl_perms(mode_t mode, int r_mask, int w_mask, int x_mask)
700 /****************************************************************************
701 Map canon_ace permissions (a mode_t containing only S_(R|W|X)USR bits) to
702 an SMB_ACL_PERMSET_T.
703 ****************************************************************************/
705 static int map_acl_perms_to_permset(connection_struct *conn, mode_t mode, SMB_ACL_PERMSET_T *p_permset)
707 if (SMB_VFS_SYS_ACL_CLEAR_PERMS(conn, *p_permset) == -1)
709 if (mode & S_IRUSR) {
710 if (SMB_VFS_SYS_ACL_ADD_PERM(conn, *p_permset, SMB_ACL_READ) == -1)
713 if (mode & S_IWUSR) {
714 if (SMB_VFS_SYS_ACL_ADD_PERM(conn, *p_permset, SMB_ACL_WRITE) == -1)
717 if (mode & S_IXUSR) {
718 if (SMB_VFS_SYS_ACL_ADD_PERM(conn, *p_permset, SMB_ACL_EXECUTE) == -1)
724 /****************************************************************************
725 Function to create owner and group SIDs from a SMB_STRUCT_STAT.
726 ****************************************************************************/
728 static void create_file_sids(const SMB_STRUCT_STAT *psbuf, DOM_SID *powner_sid, DOM_SID *pgroup_sid)
730 uid_to_sid( powner_sid, psbuf->st_uid );
731 gid_to_sid( pgroup_sid, psbuf->st_gid );
734 /****************************************************************************
735 Is the identity in two ACEs equal ? Check both SID and uid/gid.
736 ****************************************************************************/
738 static bool identity_in_ace_equal(canon_ace *ace1, canon_ace *ace2)
740 if (sid_equal(&ace1->trustee, &ace2->trustee)) {
743 if (ace1->owner_type == ace2->owner_type) {
744 if (ace1->owner_type == UID_ACE &&
745 ace1->unix_ug.uid == ace2->unix_ug.uid) {
747 } else if (ace1->owner_type == GID_ACE &&
748 ace1->unix_ug.gid == ace2->unix_ug.gid) {
755 /****************************************************************************
756 Merge aces with a common sid - if both are allow or deny, OR the permissions together and
757 delete the second one. If the first is deny, mask the permissions off and delete the allow
758 if the permissions become zero, delete the deny if the permissions are non zero.
759 ****************************************************************************/
761 static void merge_aces( canon_ace **pp_list_head )
763 canon_ace *list_head = *pp_list_head;
764 canon_ace *curr_ace_outer;
765 canon_ace *curr_ace_outer_next;
768 * First, merge allow entries with identical SIDs, and deny entries
769 * with identical SIDs.
772 for (curr_ace_outer = list_head; curr_ace_outer; curr_ace_outer = curr_ace_outer_next) {
774 canon_ace *curr_ace_next;
776 curr_ace_outer_next = curr_ace_outer->next; /* Save the link in case we delete. */
778 for (curr_ace = curr_ace_outer->next; curr_ace; curr_ace = curr_ace_next) {
780 curr_ace_next = curr_ace->next; /* Save the link in case of delete. */
782 if (identity_in_ace_equal(curr_ace, curr_ace_outer) &&
783 (curr_ace->attr == curr_ace_outer->attr)) {
785 if( DEBUGLVL( 10 )) {
786 dbgtext("merge_aces: Merging ACE's\n");
787 print_canon_ace( curr_ace_outer, 0);
788 print_canon_ace( curr_ace, 0);
791 /* Merge two allow or two deny ACE's. */
793 curr_ace_outer->perms |= curr_ace->perms;
794 DLIST_REMOVE(list_head, curr_ace);
796 curr_ace_outer_next = curr_ace_outer->next; /* We may have deleted the link. */
802 * Now go through and mask off allow permissions with deny permissions.
803 * We can delete either the allow or deny here as we know that each SID
804 * appears only once in the list.
807 for (curr_ace_outer = list_head; curr_ace_outer; curr_ace_outer = curr_ace_outer_next) {
809 canon_ace *curr_ace_next;
811 curr_ace_outer_next = curr_ace_outer->next; /* Save the link in case we delete. */
813 for (curr_ace = curr_ace_outer->next; curr_ace; curr_ace = curr_ace_next) {
815 curr_ace_next = curr_ace->next; /* Save the link in case of delete. */
818 * Subtract ACE's with different entries. Due to the ordering constraints
819 * we've put on the ACL, we know the deny must be the first one.
822 if (identity_in_ace_equal(curr_ace, curr_ace_outer) &&
823 (curr_ace_outer->attr == DENY_ACE) && (curr_ace->attr == ALLOW_ACE)) {
825 if( DEBUGLVL( 10 )) {
826 dbgtext("merge_aces: Masking ACE's\n");
827 print_canon_ace( curr_ace_outer, 0);
828 print_canon_ace( curr_ace, 0);
831 curr_ace->perms &= ~curr_ace_outer->perms;
833 if (curr_ace->perms == 0) {
836 * The deny overrides the allow. Remove the allow.
839 DLIST_REMOVE(list_head, curr_ace);
841 curr_ace_outer_next = curr_ace_outer->next; /* We may have deleted the link. */
846 * Even after removing permissions, there
847 * are still allow permissions - delete the deny.
848 * It is safe to delete the deny here,
849 * as we are guarenteed by the deny first
850 * ordering that all the deny entries for
851 * this SID have already been merged into one
852 * before we can get to an allow ace.
855 DLIST_REMOVE(list_head, curr_ace_outer);
856 SAFE_FREE(curr_ace_outer);
861 } /* end for curr_ace */
862 } /* end for curr_ace_outer */
864 /* We may have modified the list. */
866 *pp_list_head = list_head;
869 /****************************************************************************
870 Check if we need to return NT4.x compatible ACL entries.
871 ****************************************************************************/
873 static bool nt4_compatible_acls(void)
875 int compat = lp_acl_compatibility();
877 if (compat == ACL_COMPAT_AUTO) {
878 enum remote_arch_types ra_type = get_remote_arch();
880 /* Automatically adapt to client */
881 return (ra_type <= RA_WINNT);
883 return (compat == ACL_COMPAT_WINNT);
887 /****************************************************************************
888 Map canon_ace perms to permission bits NT.
889 The attr element is not used here - we only process deny entries on set,
890 not get. Deny entries are implicit on get with ace->perms = 0.
891 ****************************************************************************/
893 static SEC_ACCESS map_canon_ace_perms(int snum,
894 enum security_ace_type *pacl_type,
901 *pacl_type = SEC_ACE_TYPE_ACCESS_ALLOWED;
903 if (lp_acl_map_full_control(snum) && ((perms & ALL_ACE_PERMS) == ALL_ACE_PERMS)) {
905 nt_mask = UNIX_DIRECTORY_ACCESS_RWX;
907 nt_mask = (UNIX_ACCESS_RWX & ~DELETE_ACCESS);
909 } else if ((perms & ALL_ACE_PERMS) == (mode_t)0) {
911 * Windows NT refuses to display ACEs with no permissions in them (but
912 * they are perfectly legal with Windows 2000). If the ACE has empty
913 * permissions we cannot use 0, so we use the otherwise unused
914 * WRITE_OWNER permission, which we ignore when we set an ACL.
915 * We abstract this into a #define of UNIX_ACCESS_NONE to allow this
916 * to be changed in the future.
919 if (nt4_compatible_acls())
920 nt_mask = UNIX_ACCESS_NONE;
925 nt_mask |= ((perms & S_IRUSR) ? UNIX_DIRECTORY_ACCESS_R : 0 );
926 nt_mask |= ((perms & S_IWUSR) ? UNIX_DIRECTORY_ACCESS_W : 0 );
927 nt_mask |= ((perms & S_IXUSR) ? UNIX_DIRECTORY_ACCESS_X : 0 );
929 nt_mask |= ((perms & S_IRUSR) ? UNIX_ACCESS_R : 0 );
930 nt_mask |= ((perms & S_IWUSR) ? UNIX_ACCESS_W : 0 );
931 nt_mask |= ((perms & S_IXUSR) ? UNIX_ACCESS_X : 0 );
935 DEBUG(10,("map_canon_ace_perms: Mapped (UNIX) %x to (NT) %x\n",
936 (unsigned int)perms, (unsigned int)nt_mask ));
938 init_sec_access(&sa,nt_mask);
942 /****************************************************************************
943 Map NT perms to a UNIX mode_t.
944 ****************************************************************************/
946 #define FILE_SPECIFIC_READ_BITS (FILE_READ_DATA|FILE_READ_EA|FILE_READ_ATTRIBUTES)
947 #define FILE_SPECIFIC_WRITE_BITS (FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_WRITE_EA|FILE_WRITE_ATTRIBUTES)
948 #define FILE_SPECIFIC_EXECUTE_BITS (FILE_EXECUTE)
950 static mode_t map_nt_perms( uint32 *mask, int type)
956 if((*mask) & GENERIC_ALL_ACCESS)
957 mode = S_IRUSR|S_IWUSR|S_IXUSR;
959 mode |= ((*mask) & (GENERIC_READ_ACCESS|FILE_SPECIFIC_READ_BITS)) ? S_IRUSR : 0;
960 mode |= ((*mask) & (GENERIC_WRITE_ACCESS|FILE_SPECIFIC_WRITE_BITS)) ? S_IWUSR : 0;
961 mode |= ((*mask) & (GENERIC_EXECUTE_ACCESS|FILE_SPECIFIC_EXECUTE_BITS)) ? S_IXUSR : 0;
965 if((*mask) & GENERIC_ALL_ACCESS)
966 mode = S_IRGRP|S_IWGRP|S_IXGRP;
968 mode |= ((*mask) & (GENERIC_READ_ACCESS|FILE_SPECIFIC_READ_BITS)) ? S_IRGRP : 0;
969 mode |= ((*mask) & (GENERIC_WRITE_ACCESS|FILE_SPECIFIC_WRITE_BITS)) ? S_IWGRP : 0;
970 mode |= ((*mask) & (GENERIC_EXECUTE_ACCESS|FILE_SPECIFIC_EXECUTE_BITS)) ? S_IXGRP : 0;
974 if((*mask) & GENERIC_ALL_ACCESS)
975 mode = S_IROTH|S_IWOTH|S_IXOTH;
977 mode |= ((*mask) & (GENERIC_READ_ACCESS|FILE_SPECIFIC_READ_BITS)) ? S_IROTH : 0;
978 mode |= ((*mask) & (GENERIC_WRITE_ACCESS|FILE_SPECIFIC_WRITE_BITS)) ? S_IWOTH : 0;
979 mode |= ((*mask) & (GENERIC_EXECUTE_ACCESS|FILE_SPECIFIC_EXECUTE_BITS)) ? S_IXOTH : 0;
987 /****************************************************************************
988 Unpack a SEC_DESC into a UNIX owner and group.
989 ****************************************************************************/
991 NTSTATUS unpack_nt_owners(int snum, uid_t *puser, gid_t *pgrp, uint32 security_info_sent, const SEC_DESC *psd)
999 if(security_info_sent == 0) {
1000 DEBUG(0,("unpack_nt_owners: no security info sent !\n"));
1001 return NT_STATUS_OK;
1005 * Validate the owner and group SID's.
1008 memset(&owner_sid, '\0', sizeof(owner_sid));
1009 memset(&grp_sid, '\0', sizeof(grp_sid));
1011 DEBUG(5,("unpack_nt_owners: validating owner_sids.\n"));
1014 * Don't immediately fail if the owner sid cannot be validated.
1015 * This may be a group chown only set.
1018 if (security_info_sent & OWNER_SECURITY_INFORMATION) {
1019 sid_copy(&owner_sid, psd->owner_sid);
1020 if (!sid_to_uid(&owner_sid, puser)) {
1021 if (lp_force_unknown_acl_user(snum)) {
1022 /* this allows take ownership to work
1024 *puser = current_user.ut.uid;
1026 DEBUG(3,("unpack_nt_owners: unable to validate"
1027 " owner sid for %s\n",
1028 sid_string_dbg(&owner_sid)));
1029 return NT_STATUS_INVALID_OWNER;
1032 DEBUG(3,("unpack_nt_owners: owner sid mapped to uid %u\n",
1033 (unsigned int)*puser ));
1037 * Don't immediately fail if the group sid cannot be validated.
1038 * This may be an owner chown only set.
1041 if (security_info_sent & GROUP_SECURITY_INFORMATION) {
1042 sid_copy(&grp_sid, psd->group_sid);
1043 if (!sid_to_gid( &grp_sid, pgrp)) {
1044 if (lp_force_unknown_acl_user(snum)) {
1045 /* this allows take group ownership to work
1047 *pgrp = current_user.ut.gid;
1049 DEBUG(3,("unpack_nt_owners: unable to validate"
1051 return NT_STATUS_INVALID_OWNER;
1054 DEBUG(3,("unpack_nt_owners: group sid mapped to gid %u\n",
1055 (unsigned int)*pgrp));
1058 DEBUG(5,("unpack_nt_owners: owner_sids validated.\n"));
1060 return NT_STATUS_OK;
1063 /****************************************************************************
1064 Ensure the enforced permissions for this share apply.
1065 ****************************************************************************/
1067 static void apply_default_perms(const struct share_params *params,
1068 const bool is_directory, canon_ace *pace,
1071 mode_t and_bits = (mode_t)0;
1072 mode_t or_bits = (mode_t)0;
1074 /* Get the initial bits to apply. */
1077 and_bits = lp_dir_security_mask(params->service);
1078 or_bits = lp_force_dir_security_mode(params->service);
1080 and_bits = lp_security_mask(params->service);
1081 or_bits = lp_force_security_mode(params->service);
1084 /* Now bounce them into the S_USR space. */
1087 /* Ensure owner has read access. */
1088 pace->perms |= S_IRUSR;
1090 pace->perms |= (S_IWUSR|S_IXUSR);
1091 and_bits = unix_perms_to_acl_perms(and_bits, S_IRUSR, S_IWUSR, S_IXUSR);
1092 or_bits = unix_perms_to_acl_perms(or_bits, S_IRUSR, S_IWUSR, S_IXUSR);
1095 and_bits = unix_perms_to_acl_perms(and_bits, S_IRGRP, S_IWGRP, S_IXGRP);
1096 or_bits = unix_perms_to_acl_perms(or_bits, S_IRGRP, S_IWGRP, S_IXGRP);
1099 and_bits = unix_perms_to_acl_perms(and_bits, S_IROTH, S_IWOTH, S_IXOTH);
1100 or_bits = unix_perms_to_acl_perms(or_bits, S_IROTH, S_IWOTH, S_IXOTH);
1104 pace->perms = ((pace->perms & and_bits)|or_bits);
1107 /****************************************************************************
1108 Check if a given uid/SID is in a group gid/SID. This is probably very
1109 expensive and will need optimisation. A *lot* of optimisation :-). JRA.
1110 ****************************************************************************/
1112 static bool uid_entry_in_group( canon_ace *uid_ace, canon_ace *group_ace )
1114 const char *u_name = NULL;
1116 /* "Everyone" always matches every uid. */
1118 if (sid_equal(&group_ace->trustee, &global_sid_World))
1121 /* Assume that the current user is in the current group (force group) */
1123 if (uid_ace->unix_ug.uid == current_user.ut.uid && group_ace->unix_ug.gid == current_user.ut.gid)
1126 /* u_name talloc'ed off tos. */
1127 u_name = uidtoname(uid_ace->unix_ug.uid);
1131 return user_in_group_sid(u_name, &group_ace->trustee);
1134 /****************************************************************************
1135 A well formed POSIX file or default ACL has at least 3 entries, a
1136 SMB_ACL_USER_OBJ, SMB_ACL_GROUP_OBJ, SMB_ACL_OTHER_OBJ.
1137 In addition, the owner must always have at least read access.
1138 When using this call on get_acl, the pst struct is valid and contains
1139 the mode of the file. When using this call on set_acl, the pst struct has
1140 been modified to have a mode containing the default for this file or directory
1142 ****************************************************************************/
1144 static bool ensure_canon_entry_valid(canon_ace **pp_ace,
1145 const struct share_params *params,
1146 const bool is_directory,
1147 const DOM_SID *pfile_owner_sid,
1148 const DOM_SID *pfile_grp_sid,
1149 const SMB_STRUCT_STAT *pst,
1153 bool got_user = False;
1154 bool got_grp = False;
1155 bool got_other = False;
1156 canon_ace *pace_other = NULL;
1158 for (pace = *pp_ace; pace; pace = pace->next) {
1159 if (pace->type == SMB_ACL_USER_OBJ) {
1162 apply_default_perms(params, is_directory, pace, S_IRUSR);
1165 } else if (pace->type == SMB_ACL_GROUP_OBJ) {
1168 * Ensure create mask/force create mode is respected on set.
1172 apply_default_perms(params, is_directory, pace, S_IRGRP);
1175 } else if (pace->type == SMB_ACL_OTHER) {
1178 * Ensure create mask/force create mode is respected on set.
1182 apply_default_perms(params, is_directory, pace, S_IROTH);
1189 if ((pace = SMB_MALLOC_P(canon_ace)) == NULL) {
1190 DEBUG(0,("ensure_canon_entry_valid: malloc fail.\n"));
1195 pace->type = SMB_ACL_USER_OBJ;
1196 pace->owner_type = UID_ACE;
1197 pace->unix_ug.uid = pst->st_uid;
1198 pace->trustee = *pfile_owner_sid;
1199 pace->attr = ALLOW_ACE;
1202 /* See if the owning user is in any of the other groups in
1203 the ACE. If so, OR in the permissions from that group. */
1205 bool group_matched = False;
1206 canon_ace *pace_iter;
1208 for (pace_iter = *pp_ace; pace_iter; pace_iter = pace_iter->next) {
1209 if (pace_iter->type == SMB_ACL_GROUP_OBJ || pace_iter->type == SMB_ACL_GROUP) {
1210 if (uid_entry_in_group(pace, pace_iter)) {
1211 pace->perms |= pace_iter->perms;
1212 group_matched = True;
1217 /* If we only got an "everyone" perm, just use that. */
1218 if (!group_matched) {
1220 pace->perms = pace_other->perms;
1225 apply_default_perms(params, is_directory, pace, S_IRUSR);
1227 pace->perms = unix_perms_to_acl_perms(pst->st_mode, S_IRUSR, S_IWUSR, S_IXUSR);
1230 DLIST_ADD(*pp_ace, pace);
1234 if ((pace = SMB_MALLOC_P(canon_ace)) == NULL) {
1235 DEBUG(0,("ensure_canon_entry_valid: malloc fail.\n"));
1240 pace->type = SMB_ACL_GROUP_OBJ;
1241 pace->owner_type = GID_ACE;
1242 pace->unix_ug.uid = pst->st_gid;
1243 pace->trustee = *pfile_grp_sid;
1244 pace->attr = ALLOW_ACE;
1246 /* If we only got an "everyone" perm, just use that. */
1248 pace->perms = pace_other->perms;
1251 apply_default_perms(params, is_directory, pace, S_IRGRP);
1253 pace->perms = unix_perms_to_acl_perms(pst->st_mode, S_IRGRP, S_IWGRP, S_IXGRP);
1256 DLIST_ADD(*pp_ace, pace);
1260 if ((pace = SMB_MALLOC_P(canon_ace)) == NULL) {
1261 DEBUG(0,("ensure_canon_entry_valid: malloc fail.\n"));
1266 pace->type = SMB_ACL_OTHER;
1267 pace->owner_type = WORLD_ACE;
1268 pace->unix_ug.world = -1;
1269 pace->trustee = global_sid_World;
1270 pace->attr = ALLOW_ACE;
1273 apply_default_perms(params, is_directory, pace, S_IROTH);
1275 pace->perms = unix_perms_to_acl_perms(pst->st_mode, S_IROTH, S_IWOTH, S_IXOTH);
1277 DLIST_ADD(*pp_ace, pace);
1283 /****************************************************************************
1284 Check if a POSIX ACL has the required SMB_ACL_USER_OBJ and SMB_ACL_GROUP_OBJ entries.
1285 If it does not have them, check if there are any entries where the trustee is the
1286 file owner or the owning group, and map these to SMB_ACL_USER_OBJ and SMB_ACL_GROUP_OBJ.
1287 ****************************************************************************/
1289 static void check_owning_objs(canon_ace *ace, DOM_SID *pfile_owner_sid, DOM_SID *pfile_grp_sid)
1291 bool got_user_obj, got_group_obj;
1292 canon_ace *current_ace;
1295 entries = count_canon_ace_list(ace);
1296 got_user_obj = False;
1297 got_group_obj = False;
1299 for (i=0, current_ace = ace; i < entries; i++, current_ace = current_ace->next) {
1300 if (current_ace->type == SMB_ACL_USER_OBJ)
1301 got_user_obj = True;
1302 else if (current_ace->type == SMB_ACL_GROUP_OBJ)
1303 got_group_obj = True;
1305 if (got_user_obj && got_group_obj) {
1306 DEBUG(10,("check_owning_objs: ACL had owning user/group entries.\n"));
1310 for (i=0, current_ace = ace; i < entries; i++, current_ace = current_ace->next) {
1311 if (!got_user_obj && current_ace->owner_type == UID_ACE &&
1312 sid_equal(¤t_ace->trustee, pfile_owner_sid)) {
1313 current_ace->type = SMB_ACL_USER_OBJ;
1314 got_user_obj = True;
1316 if (!got_group_obj && current_ace->owner_type == GID_ACE &&
1317 sid_equal(¤t_ace->trustee, pfile_grp_sid)) {
1318 current_ace->type = SMB_ACL_GROUP_OBJ;
1319 got_group_obj = True;
1323 DEBUG(10,("check_owning_objs: ACL is missing an owner entry.\n"));
1325 DEBUG(10,("check_owning_objs: ACL is missing an owning group entry.\n"));
1328 /****************************************************************************
1329 Unpack a SEC_DESC into two canonical ace lists.
1330 ****************************************************************************/
1332 static bool create_canon_ace_lists(files_struct *fsp,
1333 SMB_STRUCT_STAT *pst,
1334 DOM_SID *pfile_owner_sid,
1335 DOM_SID *pfile_grp_sid,
1336 canon_ace **ppfile_ace,
1337 canon_ace **ppdir_ace,
1338 const SEC_ACL *dacl)
1340 bool all_aces_are_inherit_only = (fsp->is_directory ? True : False);
1341 canon_ace *file_ace = NULL;
1342 canon_ace *dir_ace = NULL;
1343 canon_ace *current_ace = NULL;
1344 bool got_dir_allow = False;
1345 bool got_file_allow = False;
1352 * Convert the incoming ACL into a more regular form.
1355 for(i = 0; i < dacl->num_aces; i++) {
1356 SEC_ACE *psa = &dacl->aces[i];
1358 if((psa->type != SEC_ACE_TYPE_ACCESS_ALLOWED) && (psa->type != SEC_ACE_TYPE_ACCESS_DENIED)) {
1359 DEBUG(3,("create_canon_ace_lists: unable to set anything but an ALLOW or DENY ACE.\n"));
1363 if (nt4_compatible_acls()) {
1365 * The security mask may be UNIX_ACCESS_NONE which should map into
1366 * no permissions (we overload the WRITE_OWNER bit for this) or it
1367 * should be one of the ALL/EXECUTE/READ/WRITE bits. Arrange for this
1368 * to be so. Any other bits override the UNIX_ACCESS_NONE bit.
1372 * Convert GENERIC bits to specific bits.
1375 se_map_generic(&psa->access_mask, &file_generic_mapping);
1377 psa->access_mask &= (UNIX_ACCESS_NONE|FILE_ALL_ACCESS);
1379 if(psa->access_mask != UNIX_ACCESS_NONE)
1380 psa->access_mask &= ~UNIX_ACCESS_NONE;
1385 * Deal with the fact that NT 4.x re-writes the canonical format
1386 * that we return for default ACLs. If a directory ACE is identical
1387 * to a inherited directory ACE then NT changes the bits so that the
1388 * first ACE is set to OI|IO and the second ACE for this SID is set
1389 * to CI. We need to repair this. JRA.
1392 for(i = 0; i < dacl->num_aces; i++) {
1393 SEC_ACE *psa1 = &dacl->aces[i];
1395 for (j = i + 1; j < dacl->num_aces; j++) {
1396 SEC_ACE *psa2 = &dacl->aces[j];
1398 if (psa1->access_mask != psa2->access_mask)
1401 if (!sid_equal(&psa1->trustee, &psa2->trustee))
1405 * Ok - permission bits and SIDs are equal.
1406 * Check if flags were re-written.
1409 if (psa1->flags & SEC_ACE_FLAG_INHERIT_ONLY) {
1411 psa1->flags |= (psa2->flags & (SEC_ACE_FLAG_CONTAINER_INHERIT|SEC_ACE_FLAG_OBJECT_INHERIT));
1412 psa2->flags &= ~(SEC_ACE_FLAG_CONTAINER_INHERIT|SEC_ACE_FLAG_OBJECT_INHERIT);
1414 } else if (psa2->flags & SEC_ACE_FLAG_INHERIT_ONLY) {
1416 psa2->flags |= (psa1->flags & (SEC_ACE_FLAG_CONTAINER_INHERIT|SEC_ACE_FLAG_OBJECT_INHERIT));
1417 psa1->flags &= ~(SEC_ACE_FLAG_CONTAINER_INHERIT|SEC_ACE_FLAG_OBJECT_INHERIT);
1423 for(i = 0; i < dacl->num_aces; i++) {
1424 SEC_ACE *psa = &dacl->aces[i];
1427 * Create a cannon_ace entry representing this NT DACL ACE.
1430 if ((current_ace = SMB_MALLOC_P(canon_ace)) == NULL) {
1431 free_canon_ace_list(file_ace);
1432 free_canon_ace_list(dir_ace);
1433 DEBUG(0,("create_canon_ace_lists: malloc fail.\n"));
1437 ZERO_STRUCTP(current_ace);
1439 sid_copy(¤t_ace->trustee, &psa->trustee);
1442 * Try and work out if the SID is a user or group
1443 * as we need to flag these differently for POSIX.
1444 * Note what kind of a POSIX ACL this should map to.
1447 if( sid_equal(¤t_ace->trustee, &global_sid_World)) {
1448 current_ace->owner_type = WORLD_ACE;
1449 current_ace->unix_ug.world = -1;
1450 current_ace->type = SMB_ACL_OTHER;
1451 } else if (sid_equal(¤t_ace->trustee, &global_sid_Creator_Owner)) {
1452 current_ace->owner_type = UID_ACE;
1453 current_ace->unix_ug.uid = pst->st_uid;
1454 current_ace->type = SMB_ACL_USER_OBJ;
1457 * The Creator Owner entry only specifies inheritable permissions,
1458 * never access permissions. WinNT doesn't always set the ACE to
1459 *INHERIT_ONLY, though.
1462 if (nt4_compatible_acls())
1463 psa->flags |= SEC_ACE_FLAG_INHERIT_ONLY;
1464 } else if (sid_equal(¤t_ace->trustee, &global_sid_Creator_Group)) {
1465 current_ace->owner_type = GID_ACE;
1466 current_ace->unix_ug.gid = pst->st_gid;
1467 current_ace->type = SMB_ACL_GROUP_OBJ;
1470 * The Creator Group entry only specifies inheritable permissions,
1471 * never access permissions. WinNT doesn't always set the ACE to
1472 *INHERIT_ONLY, though.
1474 if (nt4_compatible_acls())
1475 psa->flags |= SEC_ACE_FLAG_INHERIT_ONLY;
1477 } else if (sid_to_uid( ¤t_ace->trustee, ¤t_ace->unix_ug.uid)) {
1478 current_ace->owner_type = UID_ACE;
1479 /* If it's the owning user, this is a user_obj, not
1481 if (current_ace->unix_ug.uid == pst->st_uid) {
1482 current_ace->type = SMB_ACL_USER_OBJ;
1484 current_ace->type = SMB_ACL_USER;
1486 } else if (sid_to_gid( ¤t_ace->trustee, ¤t_ace->unix_ug.gid)) {
1487 current_ace->owner_type = GID_ACE;
1488 /* If it's the primary group, this is a group_obj, not
1490 if (current_ace->unix_ug.gid == pst->st_gid) {
1491 current_ace->type = SMB_ACL_GROUP_OBJ;
1493 current_ace->type = SMB_ACL_GROUP;
1497 * Silently ignore map failures in non-mappable SIDs (NT Authority, BUILTIN etc).
1500 if (non_mappable_sid(&psa->trustee)) {
1501 DEBUG(10, ("create_canon_ace_lists: ignoring "
1502 "non-mappable SID %s\n",
1503 sid_string_dbg(&psa->trustee)));
1504 SAFE_FREE(current_ace);
1508 free_canon_ace_list(file_ace);
1509 free_canon_ace_list(dir_ace);
1510 DEBUG(0, ("create_canon_ace_lists: unable to map SID "
1511 "%s to uid or gid.\n",
1512 sid_string_dbg(¤t_ace->trustee)));
1513 SAFE_FREE(current_ace);
1518 * Map the given NT permissions into a UNIX mode_t containing only
1519 * S_I(R|W|X)USR bits.
1522 current_ace->perms |= map_nt_perms( &psa->access_mask, S_IRUSR);
1523 current_ace->attr = (psa->type == SEC_ACE_TYPE_ACCESS_ALLOWED) ? ALLOW_ACE : DENY_ACE;
1524 current_ace->inherited = ((psa->flags & SEC_ACE_FLAG_INHERITED_ACE) ? True : False);
1527 * Now add the created ace to either the file list, the directory
1528 * list, or both. We *MUST* preserve the order here (hence we use
1529 * DLIST_ADD_END) as NT ACLs are order dependent.
1532 if (fsp->is_directory) {
1535 * We can only add to the default POSIX ACE list if the ACE is
1536 * designed to be inherited by both files and directories.
1539 if ((psa->flags & (SEC_ACE_FLAG_OBJECT_INHERIT|SEC_ACE_FLAG_CONTAINER_INHERIT)) ==
1540 (SEC_ACE_FLAG_OBJECT_INHERIT|SEC_ACE_FLAG_CONTAINER_INHERIT)) {
1542 DLIST_ADD_END(dir_ace, current_ace, canon_ace *);
1545 * Note if this was an allow ace. We can't process
1546 * any further deny ace's after this.
1549 if (current_ace->attr == ALLOW_ACE)
1550 got_dir_allow = True;
1552 if ((current_ace->attr == DENY_ACE) && got_dir_allow) {
1553 DEBUG(0,("create_canon_ace_lists: malformed ACL in inheritable ACL ! \
1554 Deny entry after Allow entry. Failing to set on file %s.\n", fsp->fsp_name ));
1555 free_canon_ace_list(file_ace);
1556 free_canon_ace_list(dir_ace);
1560 if( DEBUGLVL( 10 )) {
1561 dbgtext("create_canon_ace_lists: adding dir ACL:\n");
1562 print_canon_ace( current_ace, 0);
1566 * If this is not an inherit only ACE we need to add a duplicate
1570 if (!(psa->flags & SEC_ACE_FLAG_INHERIT_ONLY)) {
1571 canon_ace *dup_ace = dup_canon_ace(current_ace);
1574 DEBUG(0,("create_canon_ace_lists: malloc fail !\n"));
1575 free_canon_ace_list(file_ace);
1576 free_canon_ace_list(dir_ace);
1581 * We must not free current_ace here as its
1582 * pointer is now owned by the dir_ace list.
1584 current_ace = dup_ace;
1587 * We must not free current_ace here as its
1588 * pointer is now owned by the dir_ace list.
1596 * Only add to the file ACL if not inherit only.
1599 if (current_ace && !(psa->flags & SEC_ACE_FLAG_INHERIT_ONLY)) {
1600 DLIST_ADD_END(file_ace, current_ace, canon_ace *);
1603 * Note if this was an allow ace. We can't process
1604 * any further deny ace's after this.
1607 if (current_ace->attr == ALLOW_ACE)
1608 got_file_allow = True;
1610 if ((current_ace->attr == DENY_ACE) && got_file_allow) {
1611 DEBUG(0,("create_canon_ace_lists: malformed ACL in file ACL ! \
1612 Deny entry after Allow entry. Failing to set on file %s.\n", fsp->fsp_name ));
1613 free_canon_ace_list(file_ace);
1614 free_canon_ace_list(dir_ace);
1618 if( DEBUGLVL( 10 )) {
1619 dbgtext("create_canon_ace_lists: adding file ACL:\n");
1620 print_canon_ace( current_ace, 0);
1622 all_aces_are_inherit_only = False;
1624 * We must not free current_ace here as its
1625 * pointer is now owned by the file_ace list.
1631 * Free if ACE was not added.
1634 SAFE_FREE(current_ace);
1637 if (fsp->is_directory && all_aces_are_inherit_only) {
1639 * Windows 2000 is doing one of these weird 'inherit acl'
1640 * traverses to conserve NTFS ACL resources. Just pretend
1641 * there was no DACL sent. JRA.
1644 DEBUG(10,("create_canon_ace_lists: Win2k inherit acl traverse. Ignoring DACL.\n"));
1645 free_canon_ace_list(file_ace);
1646 free_canon_ace_list(dir_ace);
1651 * Check if we have SMB_ACL_USER_OBJ and SMB_ACL_GROUP_OBJ entries in each
1652 * ACL. If we don't have them, check if any SMB_ACL_USER/SMB_ACL_GROUP
1653 * entries can be converted to *_OBJ. Usually we will already have these
1654 * entries in the Default ACL, and the Access ACL will not have them.
1657 check_owning_objs(file_ace, pfile_owner_sid, pfile_grp_sid);
1660 check_owning_objs(dir_ace, pfile_owner_sid, pfile_grp_sid);
1664 *ppfile_ace = file_ace;
1665 *ppdir_ace = dir_ace;
1670 /****************************************************************************
1671 ASCII art time again... JRA :-).
1673 We have 4 cases to process when moving from an NT ACL to a POSIX ACL. Firstly,
1674 we insist the ACL is in canonical form (ie. all DENY entries preceede ALLOW
1675 entries). Secondly, the merge code has ensured that all duplicate SID entries for
1676 allow or deny have been merged, so the same SID can only appear once in the deny
1677 list or once in the allow list.
1679 We then process as follows :
1681 ---------------------------------------------------------------------------
1682 First pass - look for a Everyone DENY entry.
1684 If it is deny all (rwx) trunate the list at this point.
1685 Else, walk the list from this point and use the deny permissions of this
1686 entry as a mask on all following allow entries. Finally, delete
1687 the Everyone DENY entry (we have applied it to everything possible).
1689 In addition, in this pass we remove any DENY entries that have
1690 no permissions (ie. they are a DENY nothing).
1691 ---------------------------------------------------------------------------
1692 Second pass - only deal with deny user entries.
1694 DENY user1 (perms XXX)
1697 for all following allow group entries where user1 is in group
1698 new_perms |= group_perms;
1700 user1 entry perms = new_perms & ~ XXX;
1702 Convert the deny entry to an allow entry with the new perms and
1703 push to the end of the list. Note if the user was in no groups
1704 this maps to a specific allow nothing entry for this user.
1706 The common case from the NT ACL choser (userX deny all) is
1707 optimised so we don't do the group lookup - we just map to
1708 an allow nothing entry.
1710 What we're doing here is inferring the allow permissions the
1711 person setting the ACE on user1 wanted by looking at the allow
1712 permissions on the groups the user is currently in. This will
1713 be a snapshot, depending on group membership but is the best
1714 we can do and has the advantage of failing closed rather than
1716 ---------------------------------------------------------------------------
1717 Third pass - only deal with deny group entries.
1719 DENY group1 (perms XXX)
1721 for all following allow user entries where user is in group1
1722 user entry perms = user entry perms & ~ XXX;
1724 If there is a group Everyone allow entry with permissions YYY,
1725 convert the group1 entry to an allow entry and modify its
1728 new_perms = YYY & ~ XXX
1730 and push to the end of the list.
1732 If there is no group Everyone allow entry then convert the
1733 group1 entry to a allow nothing entry and push to the end of the list.
1735 Note that the common case from the NT ACL choser (groupX deny all)
1736 cannot be optimised here as we need to modify user entries who are
1737 in the group to change them to a deny all also.
1739 What we're doing here is modifying the allow permissions of
1740 user entries (which are more specific in POSIX ACLs) to mask
1741 out the explicit deny set on the group they are in. This will
1742 be a snapshot depending on current group membership but is the
1743 best we can do and has the advantage of failing closed rather
1745 ---------------------------------------------------------------------------
1746 Fourth pass - cope with cumulative permissions.
1748 for all allow user entries, if there exists an allow group entry with
1749 more permissive permissions, and the user is in that group, rewrite the
1750 allow user permissions to contain both sets of permissions.
1752 Currently the code for this is #ifdef'ed out as these semantics make
1753 no sense to me. JRA.
1754 ---------------------------------------------------------------------------
1756 Note we *MUST* do the deny user pass first as this will convert deny user
1757 entries into allow user entries which can then be processed by the deny
1760 The above algorithm took a *lot* of thinking about - hence this
1761 explaination :-). JRA.
1762 ****************************************************************************/
1764 /****************************************************************************
1765 Process a canon_ace list entries. This is very complex code. We need
1766 to go through and remove the "deny" permissions from any allow entry that matches
1767 the id of this entry. We have already refused any NT ACL that wasn't in correct
1768 order (DENY followed by ALLOW). If any allow entry ends up with zero permissions,
1769 we just remove it (to fail safe). We have already removed any duplicate ace
1770 entries. Treat an "Everyone" DENY_ACE as a special case - use it to mask all
1772 ****************************************************************************/
1774 static void process_deny_list( canon_ace **pp_ace_list )
1776 canon_ace *ace_list = *pp_ace_list;
1777 canon_ace *curr_ace = NULL;
1778 canon_ace *curr_ace_next = NULL;
1780 /* Pass 1 above - look for an Everyone, deny entry. */
1782 for (curr_ace = ace_list; curr_ace; curr_ace = curr_ace_next) {
1783 canon_ace *allow_ace_p;
1785 curr_ace_next = curr_ace->next; /* So we can't lose the link. */
1787 if (curr_ace->attr != DENY_ACE)
1790 if (curr_ace->perms == (mode_t)0) {
1792 /* Deny nothing entry - delete. */
1794 DLIST_REMOVE(ace_list, curr_ace);
1798 if (!sid_equal(&curr_ace->trustee, &global_sid_World))
1801 /* JRATEST - assert. */
1802 SMB_ASSERT(curr_ace->owner_type == WORLD_ACE);
1804 if (curr_ace->perms == ALL_ACE_PERMS) {
1807 * Optimisation. This is a DENY_ALL to Everyone. Truncate the
1808 * list at this point including this entry.
1811 canon_ace *prev_entry = curr_ace->prev;
1813 free_canon_ace_list( curr_ace );
1815 prev_entry->next = NULL;
1817 /* We deleted the entire list. */
1823 for (allow_ace_p = curr_ace->next; allow_ace_p; allow_ace_p = allow_ace_p->next) {
1826 * Only mask off allow entries.
1829 if (allow_ace_p->attr != ALLOW_ACE)
1832 allow_ace_p->perms &= ~curr_ace->perms;
1836 * Now it's been applied, remove it.
1839 DLIST_REMOVE(ace_list, curr_ace);
1842 /* Pass 2 above - deal with deny user entries. */
1844 for (curr_ace = ace_list; curr_ace; curr_ace = curr_ace_next) {
1845 mode_t new_perms = (mode_t)0;
1846 canon_ace *allow_ace_p;
1848 curr_ace_next = curr_ace->next; /* So we can't lose the link. */
1850 if (curr_ace->attr != DENY_ACE)
1853 if (curr_ace->owner_type != UID_ACE)
1856 if (curr_ace->perms == ALL_ACE_PERMS) {
1859 * Optimisation - this is a deny everything to this user.
1860 * Convert to an allow nothing and push to the end of the list.
1863 curr_ace->attr = ALLOW_ACE;
1864 curr_ace->perms = (mode_t)0;
1865 DLIST_DEMOTE(ace_list, curr_ace, canon_ace *);
1869 for (allow_ace_p = curr_ace->next; allow_ace_p; allow_ace_p = allow_ace_p->next) {
1871 if (allow_ace_p->attr != ALLOW_ACE)
1874 /* We process GID_ACE and WORLD_ACE entries only. */
1876 if (allow_ace_p->owner_type == UID_ACE)
1879 if (uid_entry_in_group( curr_ace, allow_ace_p))
1880 new_perms |= allow_ace_p->perms;
1884 * Convert to a allow entry, modify the perms and push to the end
1888 curr_ace->attr = ALLOW_ACE;
1889 curr_ace->perms = (new_perms & ~curr_ace->perms);
1890 DLIST_DEMOTE(ace_list, curr_ace, canon_ace *);
1893 /* Pass 3 above - deal with deny group entries. */
1895 for (curr_ace = ace_list; curr_ace; curr_ace = curr_ace_next) {
1896 canon_ace *allow_ace_p;
1897 canon_ace *allow_everyone_p = NULL;
1899 curr_ace_next = curr_ace->next; /* So we can't lose the link. */
1901 if (curr_ace->attr != DENY_ACE)
1904 if (curr_ace->owner_type != GID_ACE)
1907 for (allow_ace_p = curr_ace->next; allow_ace_p; allow_ace_p = allow_ace_p->next) {
1909 if (allow_ace_p->attr != ALLOW_ACE)
1912 /* Store a pointer to the Everyone allow, if it exists. */
1913 if (allow_ace_p->owner_type == WORLD_ACE)
1914 allow_everyone_p = allow_ace_p;
1916 /* We process UID_ACE entries only. */
1918 if (allow_ace_p->owner_type != UID_ACE)
1921 /* Mask off the deny group perms. */
1923 if (uid_entry_in_group( allow_ace_p, curr_ace))
1924 allow_ace_p->perms &= ~curr_ace->perms;
1928 * Convert the deny to an allow with the correct perms and
1929 * push to the end of the list.
1932 curr_ace->attr = ALLOW_ACE;
1933 if (allow_everyone_p)
1934 curr_ace->perms = allow_everyone_p->perms & ~curr_ace->perms;
1936 curr_ace->perms = (mode_t)0;
1937 DLIST_DEMOTE(ace_list, curr_ace, canon_ace *);
1940 /* Doing this fourth pass allows Windows semantics to be layered
1941 * on top of POSIX semantics. I'm not sure if this is desirable.
1942 * For example, in W2K ACLs there is no way to say, "Group X no
1943 * access, user Y full access" if user Y is a member of group X.
1944 * This seems completely broken semantics to me.... JRA.
1948 /* Pass 4 above - deal with allow entries. */
1950 for (curr_ace = ace_list; curr_ace; curr_ace = curr_ace_next) {
1951 canon_ace *allow_ace_p;
1953 curr_ace_next = curr_ace->next; /* So we can't lose the link. */
1955 if (curr_ace->attr != ALLOW_ACE)
1958 if (curr_ace->owner_type != UID_ACE)
1961 for (allow_ace_p = ace_list; allow_ace_p; allow_ace_p = allow_ace_p->next) {
1963 if (allow_ace_p->attr != ALLOW_ACE)
1966 /* We process GID_ACE entries only. */
1968 if (allow_ace_p->owner_type != GID_ACE)
1971 /* OR in the group perms. */
1973 if (uid_entry_in_group( curr_ace, allow_ace_p))
1974 curr_ace->perms |= allow_ace_p->perms;
1979 *pp_ace_list = ace_list;
1982 /****************************************************************************
1983 Create a default mode that will be used if a security descriptor entry has
1984 no user/group/world entries.
1985 ****************************************************************************/
1987 static mode_t create_default_mode(files_struct *fsp, bool interitable_mode)
1989 int snum = SNUM(fsp->conn);
1990 mode_t and_bits = (mode_t)0;
1991 mode_t or_bits = (mode_t)0;
1992 mode_t mode = interitable_mode
1993 ? unix_mode( fsp->conn, FILE_ATTRIBUTE_ARCHIVE, fsp->fsp_name,
1997 if (fsp->is_directory)
1998 mode |= (S_IWUSR|S_IXUSR);
2001 * Now AND with the create mode/directory mode bits then OR with the
2002 * force create mode/force directory mode bits.
2005 if (fsp->is_directory) {
2006 and_bits = lp_dir_security_mask(snum);
2007 or_bits = lp_force_dir_security_mode(snum);
2009 and_bits = lp_security_mask(snum);
2010 or_bits = lp_force_security_mode(snum);
2013 return ((mode & and_bits)|or_bits);
2016 /****************************************************************************
2017 Unpack a SEC_DESC into two canonical ace lists. We don't depend on this
2019 ****************************************************************************/
2021 static bool unpack_canon_ace(files_struct *fsp,
2022 SMB_STRUCT_STAT *pst,
2023 DOM_SID *pfile_owner_sid,
2024 DOM_SID *pfile_grp_sid,
2025 canon_ace **ppfile_ace,
2026 canon_ace **ppdir_ace,
2027 uint32 security_info_sent,
2028 const SEC_DESC *psd)
2030 canon_ace *file_ace = NULL;
2031 canon_ace *dir_ace = NULL;
2036 if(security_info_sent == 0) {
2037 DEBUG(0,("unpack_canon_ace: no security info sent !\n"));
2042 * If no DACL then this is a chown only security descriptor.
2045 if(!(security_info_sent & DACL_SECURITY_INFORMATION) || !psd->dacl)
2049 * Now go through the DACL and create the canon_ace lists.
2052 if (!create_canon_ace_lists( fsp, pst, pfile_owner_sid, pfile_grp_sid,
2053 &file_ace, &dir_ace, psd->dacl))
2056 if ((file_ace == NULL) && (dir_ace == NULL)) {
2057 /* W2K traverse DACL set - ignore. */
2062 * Go through the canon_ace list and merge entries
2063 * belonging to identical users of identical allow or deny type.
2064 * We can do this as all deny entries come first, followed by
2065 * all allow entries (we have mandated this before accepting this acl).
2068 print_canon_ace_list( "file ace - before merge", file_ace);
2069 merge_aces( &file_ace );
2071 print_canon_ace_list( "dir ace - before merge", dir_ace);
2072 merge_aces( &dir_ace );
2075 * NT ACLs are order dependent. Go through the acl lists and
2076 * process DENY entries by masking the allow entries.
2079 print_canon_ace_list( "file ace - before deny", file_ace);
2080 process_deny_list( &file_ace);
2082 print_canon_ace_list( "dir ace - before deny", dir_ace);
2083 process_deny_list( &dir_ace);
2086 * A well formed POSIX file or default ACL has at least 3 entries, a
2087 * SMB_ACL_USER_OBJ, SMB_ACL_GROUP_OBJ, SMB_ACL_OTHER_OBJ
2088 * and optionally a mask entry. Ensure this is the case.
2091 print_canon_ace_list( "file ace - before valid", file_ace);
2094 * A default 3 element mode entry for a file should be r-- --- ---.
2095 * A default 3 element mode entry for a directory should be rwx --- ---.
2098 pst->st_mode = create_default_mode(fsp, False);
2100 if (!ensure_canon_entry_valid(&file_ace, fsp->conn->params, fsp->is_directory, pfile_owner_sid, pfile_grp_sid, pst, True)) {
2101 free_canon_ace_list(file_ace);
2102 free_canon_ace_list(dir_ace);
2106 print_canon_ace_list( "dir ace - before valid", dir_ace);
2109 * A default inheritable 3 element mode entry for a directory should be the
2110 * mode Samba will use to create a file within. Ensure user rwx bits are set if
2114 pst->st_mode = create_default_mode(fsp, True);
2116 if (dir_ace && !ensure_canon_entry_valid(&dir_ace, fsp->conn->params, fsp->is_directory, pfile_owner_sid, pfile_grp_sid, pst, True)) {
2117 free_canon_ace_list(file_ace);
2118 free_canon_ace_list(dir_ace);
2122 print_canon_ace_list( "file ace - return", file_ace);
2123 print_canon_ace_list( "dir ace - return", dir_ace);
2125 *ppfile_ace = file_ace;
2126 *ppdir_ace = dir_ace;
2131 /******************************************************************************
2132 When returning permissions, try and fit NT display
2133 semantics if possible. Note the the canon_entries here must have been malloced.
2134 The list format should be - first entry = owner, followed by group and other user
2135 entries, last entry = other.
2137 Note that this doesn't exactly match the NT semantics for an ACL. As POSIX entries
2138 are not ordered, and match on the most specific entry rather than walking a list,
2139 then a simple POSIX permission of rw-r--r-- should really map to 5 entries,
2141 Entry 0: owner : deny all except read and write.
2142 Entry 1: owner : allow read and write.
2143 Entry 2: group : deny all except read.
2144 Entry 3: group : allow read.
2145 Entry 4: Everyone : allow read.
2147 But NT cannot display this in their ACL editor !
2148 ********************************************************************************/
2150 static void arrange_posix_perms(const char *filename, canon_ace **pp_list_head)
2152 canon_ace *list_head = *pp_list_head;
2153 canon_ace *owner_ace = NULL;
2154 canon_ace *other_ace = NULL;
2155 canon_ace *ace = NULL;
2157 for (ace = list_head; ace; ace = ace->next) {
2158 if (ace->type == SMB_ACL_USER_OBJ)
2160 else if (ace->type == SMB_ACL_OTHER) {
2161 /* Last ace - this is "other" */
2166 if (!owner_ace || !other_ace) {
2167 DEBUG(0,("arrange_posix_perms: Invalid POSIX permissions for file %s, missing owner or other.\n",
2173 * The POSIX algorithm applies to owner first, and other last,
2174 * so ensure they are arranged in this order.
2178 DLIST_PROMOTE(list_head, owner_ace);
2182 DLIST_DEMOTE(list_head, other_ace, canon_ace *);
2185 /* We have probably changed the head of the list. */
2187 *pp_list_head = list_head;
2190 /****************************************************************************
2191 Create a linked list of canonical ACE entries.
2192 ****************************************************************************/
2194 static canon_ace *canonicalise_acl(struct connection_struct *conn,
2195 const char *fname, SMB_ACL_T posix_acl,
2196 const SMB_STRUCT_STAT *psbuf,
2197 const DOM_SID *powner, const DOM_SID *pgroup, struct pai_val *pal, SMB_ACL_TYPE_T the_acl_type)
2199 mode_t acl_mask = (S_IRUSR|S_IWUSR|S_IXUSR);
2200 canon_ace *list_head = NULL;
2201 canon_ace *ace = NULL;
2202 canon_ace *next_ace = NULL;
2203 int entry_id = SMB_ACL_FIRST_ENTRY;
2204 SMB_ACL_ENTRY_T entry;
2207 while ( posix_acl && (SMB_VFS_SYS_ACL_GET_ENTRY(conn, posix_acl, entry_id, &entry) == 1)) {
2208 SMB_ACL_TAG_T tagtype;
2209 SMB_ACL_PERMSET_T permset;
2212 enum ace_owner owner_type;
2214 entry_id = SMB_ACL_NEXT_ENTRY;
2216 /* Is this a MASK entry ? */
2217 if (SMB_VFS_SYS_ACL_GET_TAG_TYPE(conn, entry, &tagtype) == -1)
2220 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, entry, &permset) == -1)
2223 /* Decide which SID to use based on the ACL type. */
2225 case SMB_ACL_USER_OBJ:
2226 /* Get the SID from the owner. */
2227 sid_copy(&sid, powner);
2228 unix_ug.uid = psbuf->st_uid;
2229 owner_type = UID_ACE;
2233 uid_t *puid = (uid_t *)SMB_VFS_SYS_ACL_GET_QUALIFIER(conn, entry);
2235 DEBUG(0,("canonicalise_acl: Failed to get uid.\n"));
2239 * A SMB_ACL_USER entry for the owner is shadowed by the
2240 * SMB_ACL_USER_OBJ entry and Windows also cannot represent
2241 * that entry, so we ignore it. We also don't create such
2242 * entries out of the blue when setting ACLs, so a get/set
2243 * cycle will drop them.
2245 if (the_acl_type == SMB_ACL_TYPE_ACCESS && *puid == psbuf->st_uid) {
2246 SMB_VFS_SYS_ACL_FREE_QUALIFIER(conn, (void *)puid,tagtype);
2249 uid_to_sid( &sid, *puid);
2250 unix_ug.uid = *puid;
2251 owner_type = UID_ACE;
2252 SMB_VFS_SYS_ACL_FREE_QUALIFIER(conn, (void *)puid,tagtype);
2255 case SMB_ACL_GROUP_OBJ:
2256 /* Get the SID from the owning group. */
2257 sid_copy(&sid, pgroup);
2258 unix_ug.gid = psbuf->st_gid;
2259 owner_type = GID_ACE;
2263 gid_t *pgid = (gid_t *)SMB_VFS_SYS_ACL_GET_QUALIFIER(conn, entry);
2265 DEBUG(0,("canonicalise_acl: Failed to get gid.\n"));
2268 gid_to_sid( &sid, *pgid);
2269 unix_ug.gid = *pgid;
2270 owner_type = GID_ACE;
2271 SMB_VFS_SYS_ACL_FREE_QUALIFIER(conn, (void *)pgid,tagtype);
2275 acl_mask = convert_permset_to_mode_t(conn, permset);
2276 continue; /* Don't count the mask as an entry. */
2278 /* Use the Everyone SID */
2279 sid = global_sid_World;
2281 owner_type = WORLD_ACE;
2284 DEBUG(0,("canonicalise_acl: Unknown tagtype %u\n", (unsigned int)tagtype));
2289 * Add this entry to the list.
2292 if ((ace = SMB_MALLOC_P(canon_ace)) == NULL)
2296 ace->type = tagtype;
2297 ace->perms = convert_permset_to_mode_t(conn, permset);
2298 ace->attr = ALLOW_ACE;
2300 ace->unix_ug = unix_ug;
2301 ace->owner_type = owner_type;
2302 ace->inherited = get_inherited_flag(pal, ace, (the_acl_type == SMB_ACL_TYPE_DEFAULT));
2304 DLIST_ADD(list_head, ace);
2308 * This next call will ensure we have at least a user/group/world set.
2311 if (!ensure_canon_entry_valid(&list_head, conn->params,
2312 S_ISDIR(psbuf->st_mode), powner, pgroup,
2317 * Now go through the list, masking the permissions with the
2318 * acl_mask. Ensure all DENY Entries are at the start of the list.
2321 DEBUG(10,("canonicalise_acl: %s ace entries before arrange :\n", the_acl_type == SMB_ACL_TYPE_ACCESS ? "Access" : "Default" ));
2323 for ( ace_count = 0, ace = list_head; ace; ace = next_ace, ace_count++) {
2324 next_ace = ace->next;
2326 /* Masks are only applied to entries other than USER_OBJ and OTHER. */
2327 if (ace->type != SMB_ACL_OTHER && ace->type != SMB_ACL_USER_OBJ)
2328 ace->perms &= acl_mask;
2330 if (ace->perms == 0) {
2331 DLIST_PROMOTE(list_head, ace);
2334 if( DEBUGLVL( 10 ) ) {
2335 print_canon_ace(ace, ace_count);
2339 arrange_posix_perms(fname,&list_head );
2341 print_canon_ace_list( "canonicalise_acl: ace entries after arrange", list_head );
2347 free_canon_ace_list(list_head);
2351 /****************************************************************************
2352 Check if the current user group list contains a given group.
2353 ****************************************************************************/
2355 static bool current_user_in_group(gid_t gid)
2359 for (i = 0; i < current_user.ut.ngroups; i++) {
2360 if (current_user.ut.groups[i] == gid) {
2368 /****************************************************************************
2369 Should we override a deny ? Check 'acl group control' and 'dos filemode'.
2370 ****************************************************************************/
2372 static bool acl_group_override(connection_struct *conn,
2376 SMB_STRUCT_STAT sbuf;
2378 if ((errno != EPERM) && (errno != EACCES)) {
2382 /* file primary group == user primary or supplementary group */
2383 if (lp_acl_group_control(SNUM(conn)) &&
2384 current_user_in_group(prim_gid)) {
2388 /* user has writeable permission */
2389 if (lp_dos_filemode(SNUM(conn)) &&
2390 can_write_to_file(conn, fname, &sbuf)) {
2397 /****************************************************************************
2398 Attempt to apply an ACL to a file or directory.
2399 ****************************************************************************/
2401 static bool set_canon_ace_list(files_struct *fsp, canon_ace *the_ace, bool default_ace, gid_t prim_gid, bool *pacl_set_support)
2403 connection_struct *conn = fsp->conn;
2405 SMB_ACL_T the_acl = SMB_VFS_SYS_ACL_INIT(conn, (int)count_canon_ace_list(the_ace) + 1);
2408 SMB_ACL_ENTRY_T mask_entry;
2409 bool got_mask_entry = False;
2410 SMB_ACL_PERMSET_T mask_permset;
2411 SMB_ACL_TYPE_T the_acl_type = (default_ace ? SMB_ACL_TYPE_DEFAULT : SMB_ACL_TYPE_ACCESS);
2412 bool needs_mask = False;
2413 mode_t mask_perms = 0;
2415 #if defined(POSIX_ACL_NEEDS_MASK)
2416 /* HP-UX always wants to have a mask (called "class" there). */
2420 if (the_acl == NULL) {
2422 if (!no_acl_syscall_error(errno)) {
2424 * Only print this error message if we have some kind of ACL
2425 * support that's not working. Otherwise we would always get this.
2427 DEBUG(0,("set_canon_ace_list: Unable to init %s ACL. (%s)\n",
2428 default_ace ? "default" : "file", strerror(errno) ));
2430 *pacl_set_support = False;
2434 if( DEBUGLVL( 10 )) {
2435 dbgtext("set_canon_ace_list: setting ACL:\n");
2436 for (i = 0, p_ace = the_ace; p_ace; p_ace = p_ace->next, i++ ) {
2437 print_canon_ace( p_ace, i);
2441 for (i = 0, p_ace = the_ace; p_ace; p_ace = p_ace->next, i++ ) {
2442 SMB_ACL_ENTRY_T the_entry;
2443 SMB_ACL_PERMSET_T the_permset;
2446 * ACLs only "need" an ACL_MASK entry if there are any named user or
2447 * named group entries. But if there is an ACL_MASK entry, it applies
2448 * to ACL_USER, ACL_GROUP, and ACL_GROUP_OBJ entries. Set the mask
2449 * so that it doesn't deny (i.e., mask off) any permissions.
2452 if (p_ace->type == SMB_ACL_USER || p_ace->type == SMB_ACL_GROUP) {
2454 mask_perms |= p_ace->perms;
2455 } else if (p_ace->type == SMB_ACL_GROUP_OBJ) {
2456 mask_perms |= p_ace->perms;
2460 * Get the entry for this ACE.
2463 if (SMB_VFS_SYS_ACL_CREATE_ENTRY(conn, &the_acl, &the_entry) == -1) {
2464 DEBUG(0,("set_canon_ace_list: Failed to create entry %d. (%s)\n",
2465 i, strerror(errno) ));
2469 if (p_ace->type == SMB_ACL_MASK) {
2470 mask_entry = the_entry;
2471 got_mask_entry = True;
2475 * Ok - we now know the ACL calls should be working, don't
2476 * allow fallback to chmod.
2479 *pacl_set_support = True;
2482 * Initialise the entry from the canon_ace.
2486 * First tell the entry what type of ACE this is.
2489 if (SMB_VFS_SYS_ACL_SET_TAG_TYPE(conn, the_entry, p_ace->type) == -1) {
2490 DEBUG(0,("set_canon_ace_list: Failed to set tag type on entry %d. (%s)\n",
2491 i, strerror(errno) ));
2496 * Only set the qualifier (user or group id) if the entry is a user
2500 if ((p_ace->type == SMB_ACL_USER) || (p_ace->type == SMB_ACL_GROUP)) {
2501 if (SMB_VFS_SYS_ACL_SET_QUALIFIER(conn, the_entry,(void *)&p_ace->unix_ug.uid) == -1) {
2502 DEBUG(0,("set_canon_ace_list: Failed to set qualifier on entry %d. (%s)\n",
2503 i, strerror(errno) ));
2509 * Convert the mode_t perms in the canon_ace to a POSIX permset.
2512 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, the_entry, &the_permset) == -1) {
2513 DEBUG(0,("set_canon_ace_list: Failed to get permset on entry %d. (%s)\n",
2514 i, strerror(errno) ));
2518 if (map_acl_perms_to_permset(conn, p_ace->perms, &the_permset) == -1) {
2519 DEBUG(0,("set_canon_ace_list: Failed to create permset for mode (%u) on entry %d. (%s)\n",
2520 (unsigned int)p_ace->perms, i, strerror(errno) ));
2525 * ..and apply them to the entry.
2528 if (SMB_VFS_SYS_ACL_SET_PERMSET(conn, the_entry, the_permset) == -1) {
2529 DEBUG(0,("set_canon_ace_list: Failed to add permset on entry %d. (%s)\n",
2530 i, strerror(errno) ));
2535 print_canon_ace( p_ace, i);
2539 if (needs_mask && !got_mask_entry) {
2540 if (SMB_VFS_SYS_ACL_CREATE_ENTRY(conn, &the_acl, &mask_entry) == -1) {
2541 DEBUG(0,("set_canon_ace_list: Failed to create mask entry. (%s)\n", strerror(errno) ));
2545 if (SMB_VFS_SYS_ACL_SET_TAG_TYPE(conn, mask_entry, SMB_ACL_MASK) == -1) {
2546 DEBUG(0,("set_canon_ace_list: Failed to set tag type on mask entry. (%s)\n",strerror(errno) ));
2550 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, mask_entry, &mask_permset) == -1) {
2551 DEBUG(0,("set_canon_ace_list: Failed to get mask permset. (%s)\n", strerror(errno) ));
2555 if (map_acl_perms_to_permset(conn, S_IRUSR|S_IWUSR|S_IXUSR, &mask_permset) == -1) {
2556 DEBUG(0,("set_canon_ace_list: Failed to create mask permset. (%s)\n", strerror(errno) ));
2560 if (SMB_VFS_SYS_ACL_SET_PERMSET(conn, mask_entry, mask_permset) == -1) {
2561 DEBUG(0,("set_canon_ace_list: Failed to add mask permset. (%s)\n", strerror(errno) ));
2567 * Finally apply it to the file or directory.
2570 if(default_ace || fsp->is_directory || fsp->fh->fd == -1) {
2571 if (SMB_VFS_SYS_ACL_SET_FILE(conn, fsp->fsp_name, the_acl_type, the_acl) == -1) {
2573 * Some systems allow all the above calls and only fail with no ACL support
2574 * when attempting to apply the acl. HPUX with HFS is an example of this. JRA.
2576 if (no_acl_syscall_error(errno)) {
2577 *pacl_set_support = False;
2580 if (acl_group_override(conn, prim_gid, fsp->fsp_name)) {
2583 DEBUG(5,("set_canon_ace_list: acl group control on and current user in file %s primary group.\n",
2587 sret = SMB_VFS_SYS_ACL_SET_FILE(conn, fsp->fsp_name, the_acl_type, the_acl);
2595 DEBUG(2,("set_canon_ace_list: sys_acl_set_file type %s failed for file %s (%s).\n",
2596 the_acl_type == SMB_ACL_TYPE_DEFAULT ? "directory default" : "file",
2597 fsp->fsp_name, strerror(errno) ));
2602 if (SMB_VFS_SYS_ACL_SET_FD(fsp, the_acl) == -1) {
2604 * Some systems allow all the above calls and only fail with no ACL support
2605 * when attempting to apply the acl. HPUX with HFS is an example of this. JRA.
2607 if (no_acl_syscall_error(errno)) {
2608 *pacl_set_support = False;
2611 if (acl_group_override(conn, prim_gid, fsp->fsp_name)) {
2614 DEBUG(5,("set_canon_ace_list: acl group control on and current user in file %s primary group.\n",
2618 sret = SMB_VFS_SYS_ACL_SET_FD(fsp, the_acl);
2626 DEBUG(2,("set_canon_ace_list: sys_acl_set_file failed for file %s (%s).\n",
2627 fsp->fsp_name, strerror(errno) ));
2637 if (the_acl != NULL) {
2638 SMB_VFS_SYS_ACL_FREE_ACL(conn, the_acl);
2644 /****************************************************************************
2645 Find a particular canon_ace entry.
2646 ****************************************************************************/
2648 static struct canon_ace *canon_ace_entry_for(struct canon_ace *list, SMB_ACL_TAG_T type, posix_id *id)
2651 if (list->type == type && ((type != SMB_ACL_USER && type != SMB_ACL_GROUP) ||
2652 (type == SMB_ACL_USER && id && id->uid == list->unix_ug.uid) ||
2653 (type == SMB_ACL_GROUP && id && id->gid == list->unix_ug.gid)))
2660 /****************************************************************************
2662 ****************************************************************************/
2664 SMB_ACL_T free_empty_sys_acl(connection_struct *conn, SMB_ACL_T the_acl)
2666 SMB_ACL_ENTRY_T entry;
2670 if (SMB_VFS_SYS_ACL_GET_ENTRY(conn, the_acl, SMB_ACL_FIRST_ENTRY, &entry) != 1) {
2671 SMB_VFS_SYS_ACL_FREE_ACL(conn, the_acl);
2677 /****************************************************************************
2678 Convert a canon_ace to a generic 3 element permission - if possible.
2679 ****************************************************************************/
2681 #define MAP_PERM(p,mask,result) (((p) & (mask)) ? (result) : 0 )
2683 static bool convert_canon_ace_to_posix_perms( files_struct *fsp, canon_ace *file_ace_list, mode_t *posix_perms)
2685 int snum = SNUM(fsp->conn);
2686 size_t ace_count = count_canon_ace_list(file_ace_list);
2688 canon_ace *owner_ace = NULL;
2689 canon_ace *group_ace = NULL;
2690 canon_ace *other_ace = NULL;
2694 if (ace_count != 3) {
2695 DEBUG(3,("convert_canon_ace_to_posix_perms: Too many ACE entries for file %s to convert to \
2696 posix perms.\n", fsp->fsp_name ));
2700 for (ace_p = file_ace_list; ace_p; ace_p = ace_p->next) {
2701 if (ace_p->owner_type == UID_ACE)
2703 else if (ace_p->owner_type == GID_ACE)
2705 else if (ace_p->owner_type == WORLD_ACE)
2709 if (!owner_ace || !group_ace || !other_ace) {
2710 DEBUG(3,("convert_canon_ace_to_posix_perms: Can't get standard entries for file %s.\n",
2715 *posix_perms = (mode_t)0;
2717 *posix_perms |= owner_ace->perms;
2718 *posix_perms |= MAP_PERM(group_ace->perms, S_IRUSR, S_IRGRP);
2719 *posix_perms |= MAP_PERM(group_ace->perms, S_IWUSR, S_IWGRP);
2720 *posix_perms |= MAP_PERM(group_ace->perms, S_IXUSR, S_IXGRP);
2721 *posix_perms |= MAP_PERM(other_ace->perms, S_IRUSR, S_IROTH);
2722 *posix_perms |= MAP_PERM(other_ace->perms, S_IWUSR, S_IWOTH);
2723 *posix_perms |= MAP_PERM(other_ace->perms, S_IXUSR, S_IXOTH);
2725 /* The owner must have at least read access. */
2727 *posix_perms |= S_IRUSR;
2728 if (fsp->is_directory)
2729 *posix_perms |= (S_IWUSR|S_IXUSR);
2731 /* If requested apply the masks. */
2733 /* Get the initial bits to apply. */
2735 if (fsp->is_directory) {
2736 and_bits = lp_dir_security_mask(snum);
2737 or_bits = lp_force_dir_security_mode(snum);
2739 and_bits = lp_security_mask(snum);
2740 or_bits = lp_force_security_mode(snum);
2743 *posix_perms = (((*posix_perms) & and_bits)|or_bits);
2745 DEBUG(10,("convert_canon_ace_to_posix_perms: converted u=%o,g=%o,w=%o to perm=0%o for file %s.\n",
2746 (int)owner_ace->perms, (int)group_ace->perms, (int)other_ace->perms, (int)*posix_perms,
2752 /****************************************************************************
2753 Incoming NT ACLs on a directory can be split into a default POSIX acl (CI|OI|IO) and
2754 a normal POSIX acl. Win2k needs these split acls re-merging into one ACL
2755 with CI|OI set so it is inherited and also applies to the directory.
2756 Based on code from "Jim McDonough" <jmcd@us.ibm.com>.
2757 ****************************************************************************/
2759 static size_t merge_default_aces( SEC_ACE *nt_ace_list, size_t num_aces)
2763 for (i = 0; i < num_aces; i++) {
2764 for (j = i+1; j < num_aces; j++) {
2765 uint32 i_flags_ni = (nt_ace_list[i].flags & ~SEC_ACE_FLAG_INHERITED_ACE);
2766 uint32 j_flags_ni = (nt_ace_list[j].flags & ~SEC_ACE_FLAG_INHERITED_ACE);
2767 bool i_inh = (nt_ace_list[i].flags & SEC_ACE_FLAG_INHERITED_ACE) ? True : False;
2768 bool j_inh = (nt_ace_list[j].flags & SEC_ACE_FLAG_INHERITED_ACE) ? True : False;
2770 /* We know the lower number ACE's are file entries. */
2771 if ((nt_ace_list[i].type == nt_ace_list[j].type) &&
2772 (nt_ace_list[i].size == nt_ace_list[j].size) &&
2773 (nt_ace_list[i].access_mask == nt_ace_list[j].access_mask) &&
2774 sid_equal(&nt_ace_list[i].trustee, &nt_ace_list[j].trustee) &&
2776 (i_flags_ni == 0) &&
2777 (j_flags_ni == (SEC_ACE_FLAG_OBJECT_INHERIT|
2778 SEC_ACE_FLAG_CONTAINER_INHERIT|
2779 SEC_ACE_FLAG_INHERIT_ONLY))) {
2781 * W2K wants to have access allowed zero access ACE's
2782 * at the end of the list. If the mask is zero, merge
2783 * the non-inherited ACE onto the inherited ACE.
2786 if (nt_ace_list[i].access_mask == 0) {
2787 nt_ace_list[j].flags = SEC_ACE_FLAG_OBJECT_INHERIT|SEC_ACE_FLAG_CONTAINER_INHERIT|
2788 (i_inh ? SEC_ACE_FLAG_INHERITED_ACE : 0);
2789 if (num_aces - i - 1 > 0)
2790 memmove(&nt_ace_list[i], &nt_ace_list[i+1], (num_aces-i-1) *
2793 DEBUG(10,("merge_default_aces: Merging zero access ACE %u onto ACE %u.\n",
2794 (unsigned int)i, (unsigned int)j ));
2797 * These are identical except for the flags.
2798 * Merge the inherited ACE onto the non-inherited ACE.
2801 nt_ace_list[i].flags = SEC_ACE_FLAG_OBJECT_INHERIT|SEC_ACE_FLAG_CONTAINER_INHERIT|
2802 (i_inh ? SEC_ACE_FLAG_INHERITED_ACE : 0);
2803 if (num_aces - j - 1 > 0)
2804 memmove(&nt_ace_list[j], &nt_ace_list[j+1], (num_aces-j-1) *
2807 DEBUG(10,("merge_default_aces: Merging ACE %u onto ACE %u.\n",
2808 (unsigned int)j, (unsigned int)i ));
2819 /****************************************************************************
2820 Reply to query a security descriptor from an fsp. If it succeeds it allocates
2821 the space for the return elements and returns the size needed to return the
2822 security descriptor. This should be the only external function needed for
2823 the UNIX style get ACL.
2824 ****************************************************************************/
2826 static NTSTATUS posix_get_nt_acl_common(struct connection_struct *conn,
2828 const SMB_STRUCT_STAT *sbuf,
2829 struct pai_val *pal,
2830 SMB_ACL_T posix_acl,
2832 uint32_t security_info,
2838 SEC_ACL *psa = NULL;
2839 size_t num_acls = 0;
2840 size_t num_def_acls = 0;
2841 size_t num_aces = 0;
2842 canon_ace *file_ace = NULL;
2843 canon_ace *dir_ace = NULL;
2844 SEC_ACE *nt_ace_list = NULL;
2845 size_t num_profile_acls = 0;
2846 SEC_DESC *psd = NULL;
2849 * Get the owner, group and world SIDs.
2852 if (lp_profile_acls(SNUM(conn))) {
2853 /* For WXP SP1 the owner must be administrators. */
2854 sid_copy(&owner_sid, &global_sid_Builtin_Administrators);
2855 sid_copy(&group_sid, &global_sid_Builtin_Users);
2856 num_profile_acls = 2;
2858 create_file_sids(sbuf, &owner_sid, &group_sid);
2861 if ((security_info & DACL_SECURITY_INFORMATION) && !(security_info & PROTECTED_DACL_SECURITY_INFORMATION)) {
2864 * In the optimum case Creator Owner and Creator Group would be used for
2865 * the ACL_USER_OBJ and ACL_GROUP_OBJ entries, respectively, but this
2866 * would lead to usability problems under Windows: The Creator entries
2867 * are only available in browse lists of directories and not for files;
2868 * additionally the identity of the owning group couldn't be determined.
2869 * We therefore use those identities only for Default ACLs.
2872 /* Create the canon_ace lists. */
2873 file_ace = canonicalise_acl(conn, name, posix_acl, sbuf,
2874 &owner_sid, &group_sid, pal,
2875 SMB_ACL_TYPE_ACCESS);
2877 /* We must have *some* ACLS. */
2879 if (count_canon_ace_list(file_ace) == 0) {
2880 DEBUG(0,("get_nt_acl : No ACLs on file (%s) !\n", name));
2884 if (S_ISDIR(sbuf->st_mode) && def_acl) {
2885 dir_ace = canonicalise_acl(conn, name, def_acl,
2887 &global_sid_Creator_Owner,
2888 &global_sid_Creator_Group,
2889 pal, SMB_ACL_TYPE_DEFAULT);
2893 * Create the NT ACE list from the canonical ace lists.
2898 enum security_ace_type nt_acl_type;
2900 if (nt4_compatible_acls() && dir_ace) {
2902 * NT 4 chokes if an ACL contains an INHERIT_ONLY entry
2903 * but no non-INHERIT_ONLY entry for one SID. So we only
2904 * remove entries from the Access ACL if the
2905 * corresponding Default ACL entries have also been
2906 * removed. ACEs for CREATOR-OWNER and CREATOR-GROUP
2907 * are exceptions. We can do nothing
2908 * intelligent if the Default ACL contains entries that
2909 * are not also contained in the Access ACL, so this
2910 * case will still fail under NT 4.
2913 ace = canon_ace_entry_for(dir_ace, SMB_ACL_OTHER, NULL);
2914 if (ace && !ace->perms) {
2915 DLIST_REMOVE(dir_ace, ace);
2918 ace = canon_ace_entry_for(file_ace, SMB_ACL_OTHER, NULL);
2919 if (ace && !ace->perms) {
2920 DLIST_REMOVE(file_ace, ace);
2926 * WinNT doesn't usually have Creator Group
2927 * in browse lists, so we send this entry to
2928 * WinNT even if it contains no relevant
2929 * permissions. Once we can add
2930 * Creator Group to browse lists we can
2935 ace = canon_ace_entry_for(dir_ace, SMB_ACL_GROUP_OBJ, NULL);
2936 if (ace && !ace->perms) {
2937 DLIST_REMOVE(dir_ace, ace);
2942 ace = canon_ace_entry_for(file_ace, SMB_ACL_GROUP_OBJ, NULL);
2943 if (ace && !ace->perms) {
2944 DLIST_REMOVE(file_ace, ace);
2949 num_acls = count_canon_ace_list(file_ace);
2950 num_def_acls = count_canon_ace_list(dir_ace);
2952 /* Allocate the ace list. */
2953 if ((nt_ace_list = SMB_MALLOC_ARRAY(SEC_ACE,num_acls + num_profile_acls + num_def_acls)) == NULL) {
2954 DEBUG(0,("get_nt_acl: Unable to malloc space for nt_ace_list.\n"));
2958 memset(nt_ace_list, '\0', (num_acls + num_def_acls) * sizeof(SEC_ACE) );
2961 * Create the NT ACE list from the canonical ace lists.
2964 for (ace = file_ace; ace != NULL; ace = ace->next) {
2967 acc = map_canon_ace_perms(SNUM(conn),
2970 S_ISDIR(sbuf->st_mode));
2971 init_sec_ace(&nt_ace_list[num_aces++],
2976 SEC_ACE_FLAG_INHERITED_ACE : 0);
2979 /* The User must have access to a profile share - even
2980 * if we can't map the SID. */
2981 if (lp_profile_acls(SNUM(conn))) {
2984 init_sec_access(&acc,FILE_GENERIC_ALL);
2985 init_sec_ace(&nt_ace_list[num_aces++],
2986 &global_sid_Builtin_Users,
2987 SEC_ACE_TYPE_ACCESS_ALLOWED,
2991 for (ace = dir_ace; ace != NULL; ace = ace->next) {
2994 acc = map_canon_ace_perms(SNUM(conn),
2997 S_ISDIR(sbuf->st_mode));
2998 init_sec_ace(&nt_ace_list[num_aces++],
3002 SEC_ACE_FLAG_OBJECT_INHERIT|
3003 SEC_ACE_FLAG_CONTAINER_INHERIT|
3004 SEC_ACE_FLAG_INHERIT_ONLY|
3006 SEC_ACE_FLAG_INHERITED_ACE : 0));
3009 /* The User must have access to a profile share - even
3010 * if we can't map the SID. */
3011 if (lp_profile_acls(SNUM(conn))) {
3014 init_sec_access(&acc,FILE_GENERIC_ALL);
3015 init_sec_ace(&nt_ace_list[num_aces++], &global_sid_Builtin_Users, SEC_ACE_TYPE_ACCESS_ALLOWED, acc,
3016 SEC_ACE_FLAG_OBJECT_INHERIT|SEC_ACE_FLAG_CONTAINER_INHERIT|
3017 SEC_ACE_FLAG_INHERIT_ONLY|0);
3021 * Merge POSIX default ACLs and normal ACLs into one NT ACE.
3022 * Win2K needs this to get the inheritance correct when replacing ACLs
3023 * on a directory tree. Based on work by Jim @ IBM.
3026 num_aces = merge_default_aces(nt_ace_list, num_aces);
3031 if((psa = make_sec_acl( talloc_tos(), NT4_ACL_REVISION, num_aces, nt_ace_list)) == NULL) {
3032 DEBUG(0,("get_nt_acl: Unable to malloc space for acl.\n"));
3036 } /* security_info & DACL_SECURITY_INFORMATION */
3038 psd = make_standard_sec_desc( talloc_tos(),
3039 (security_info & OWNER_SECURITY_INFORMATION) ? &owner_sid : NULL,
3040 (security_info & GROUP_SECURITY_INFORMATION) ? &group_sid : NULL,
3045 DEBUG(0,("get_nt_acl: Unable to malloc space for security descriptor.\n"));
3051 * Windows 2000: The DACL_PROTECTED flag in the security
3052 * descriptor marks the ACL as non-inheriting, i.e., no
3053 * ACEs from higher level directories propagate to this
3054 * ACL. In the POSIX ACL model permissions are only
3055 * inherited at file create time, so ACLs never contain
3056 * any ACEs that are inherited dynamically. The DACL_PROTECTED
3057 * flag doesn't seem to bother Windows NT.
3058 * Always set this if map acl inherit is turned off.
3060 if (get_protected_flag(pal) || !lp_map_acl_inherit(SNUM(conn))) {
3061 psd->type |= SE_DESC_DACL_PROTECTED;
3065 dacl_sort_into_canonical_order(psd->dacl->aces, (unsigned int)psd->dacl->num_aces);
3073 SMB_VFS_SYS_ACL_FREE_ACL(conn, posix_acl);
3076 SMB_VFS_SYS_ACL_FREE_ACL(conn, def_acl);
3078 free_canon_ace_list(file_ace);
3079 free_canon_ace_list(dir_ace);
3080 free_inherited_info(pal);
3081 SAFE_FREE(nt_ace_list);
3083 return NT_STATUS_OK;
3086 NTSTATUS posix_fget_nt_acl(struct files_struct *fsp, uint32_t security_info,
3089 SMB_STRUCT_STAT sbuf;
3090 SMB_ACL_T posix_acl = NULL;
3091 struct pai_val *pal;
3095 DEBUG(10,("posix_fget_nt_acl: called for file %s\n", fsp->fsp_name ));
3097 /* can it happen that fsp_name == NULL ? */
3098 if (fsp->is_directory || fsp->fh->fd == -1) {
3099 return posix_get_nt_acl(fsp->conn, fsp->fsp_name,
3100 security_info, ppdesc);
3103 /* Get the stat struct for the owner info. */
3104 if(SMB_VFS_FSTAT(fsp, &sbuf) != 0) {
3105 return map_nt_error_from_unix(errno);
3108 /* Get the ACL from the fd. */
3109 posix_acl = SMB_VFS_SYS_ACL_GET_FD(fsp);
3111 pal = fload_inherited_info(fsp);
3113 return posix_get_nt_acl_common(fsp->conn, fsp->fsp_name, &sbuf, pal,
3114 posix_acl, NULL, security_info, ppdesc);
3117 NTSTATUS posix_get_nt_acl(struct connection_struct *conn, const char *name,
3118 uint32_t security_info, SEC_DESC **ppdesc)
3120 SMB_STRUCT_STAT sbuf;
3121 SMB_ACL_T posix_acl = NULL;
3122 SMB_ACL_T def_acl = NULL;
3123 struct pai_val *pal;
3127 DEBUG(10,("posix_get_nt_acl: called for file %s\n", name ));
3129 /* Get the stat struct for the owner info. */
3130 if(SMB_VFS_STAT(conn, name, &sbuf) != 0) {
3131 return map_nt_error_from_unix(errno);
3134 /* Get the ACL from the path. */
3135 posix_acl = SMB_VFS_SYS_ACL_GET_FILE(conn, name, SMB_ACL_TYPE_ACCESS);
3137 /* If it's a directory get the default POSIX ACL. */
3138 if(S_ISDIR(sbuf.st_mode)) {
3139 def_acl = SMB_VFS_SYS_ACL_GET_FILE(conn, name, SMB_ACL_TYPE_DEFAULT);
3140 def_acl = free_empty_sys_acl(conn, def_acl);
3143 pal = load_inherited_info(conn, name);
3145 return posix_get_nt_acl_common(conn, name, &sbuf, pal, posix_acl,
3146 def_acl, security_info, ppdesc);
3149 /****************************************************************************
3150 Try to chown a file. We will be able to chown it under the following conditions.
3152 1) If we have root privileges, then it will just work.
3153 2) If we have SeTakeOwnershipPrivilege we can change the user to the current user.
3154 3) If we have SeRestorePrivilege we can change the user to any other user.
3155 4) If we have write permission to the file and dos_filemodes is set
3156 then allow chown to the currently authenticated user.
3157 ****************************************************************************/
3159 int try_chown(connection_struct *conn, const char *fname, uid_t uid, gid_t gid)
3165 if(!CAN_WRITE(conn)) {
3170 /* try the direct way first */
3171 ret = SMB_VFS_CHOWN(conn, fname, uid, gid);
3175 /* Case (2) / (3) */
3176 if (lp_enable_privileges()) {
3178 bool has_take_ownership_priv = user_has_privileges(current_user.nt_user_token,
3179 &se_take_ownership);
3180 bool has_restore_priv = user_has_privileges(current_user.nt_user_token,
3184 if ( ( has_take_ownership_priv && ( uid == current_user.ut.uid ) ) ||
3186 ( has_restore_priv ) ) {
3189 /* Keep the current file gid the same - take ownership doesn't imply group change. */
3190 ret = SMB_VFS_CHOWN(conn, fname, uid, (gid_t)-1);
3197 if (!lp_dos_filemode(SNUM(conn))) {
3202 if (SMB_VFS_STAT(conn,fname,&st)) {
3206 if (!NT_STATUS_IS_OK(open_file_fchmod(conn,fname,&st,&fsp))) {
3210 /* only allow chown to the current user. This is more secure,
3211 and also copes with the case where the SID in a take ownership ACL is
3212 a local SID on the users workstation
3214 uid = current_user.ut.uid;
3217 /* Keep the current file gid the same. */
3218 ret = SMB_VFS_FCHOWN(fsp, uid, (gid_t)-1);
3221 close_file_fchmod(fsp);
3226 /****************************************************************************
3227 Take care of parent ACL inheritance.
3228 ****************************************************************************/
3230 static NTSTATUS append_parent_acl(files_struct *fsp,
3231 const SEC_DESC *pcsd,
3232 SEC_DESC **pp_new_sd)
3234 SEC_DESC *parent_sd = NULL;
3235 files_struct *parent_fsp = NULL;
3236 TALLOC_CTX *mem_ctx = talloc_tos();
3237 char *parent_name = NULL;
3238 SEC_ACE *new_ace = NULL;
3239 unsigned int num_aces = pcsd->dacl->num_aces;
3240 SMB_STRUCT_STAT sbuf;
3244 SEC_DESC *psd = dup_sec_desc(talloc_tos(), pcsd);
3245 bool is_dacl_protected = (pcsd->type & SE_DESC_DACL_PROTECTED);
3250 return NT_STATUS_NO_MEMORY;
3253 if (!parent_dirname_talloc(mem_ctx,
3257 return NT_STATUS_NO_MEMORY;
3260 status = open_directory(fsp->conn,
3264 FILE_READ_ATTRIBUTES, /* Just a stat open */
3265 FILE_SHARE_NONE, /* Ignored for stat opens */
3272 if (!NT_STATUS_IS_OK(status)) {
3276 status = SMB_VFS_GET_NT_ACL(parent_fsp->conn, parent_fsp->fsp_name,
3277 DACL_SECURITY_INFORMATION, &parent_sd );
3279 close_file(parent_fsp, NORMAL_CLOSE);
3281 if (!NT_STATUS_IS_OK(status)) {
3286 * Make room for potentially all the ACLs from
3287 * the parent. We used to add the ugw triple here,
3288 * as we knew we were dealing with POSIX ACLs.
3289 * We no longer need to do so as we can guarentee
3290 * that a default ACL from the parent directory will
3291 * be well formed for POSIX ACLs if it came from a
3292 * POSIX ACL source, and if we're not writing to a
3293 * POSIX ACL sink then we don't care if it's not well
3297 num_aces += parent_sd->dacl->num_aces;
3299 if((new_ace = TALLOC_ZERO_ARRAY(mem_ctx, SEC_ACE,
3300 num_aces)) == NULL) {
3301 return NT_STATUS_NO_MEMORY;
3304 /* Start by copying in all the given ACE entries. */
3305 for (i = 0; i < psd->dacl->num_aces; i++) {
3306 sec_ace_copy(&new_ace[i], &psd->dacl->aces[i]);
3310 * Note that we're ignoring "inherit permissions" here
3311 * as that really only applies to newly created files. JRA.
3314 /* Finally append any inherited ACEs. */
3315 for (j = 0; j < parent_sd->dacl->num_aces; j++) {
3316 SEC_ACE *se = &parent_sd->dacl->aces[j];
3318 if (fsp->is_directory) {
3319 if (!(se->flags & SEC_ACE_FLAG_CONTAINER_INHERIT)) {
3320 /* Doesn't apply to a directory - ignore. */
3321 DEBUG(10,("append_parent_acl: directory %s "
3322 "ignoring non container "
3323 "inherit flags %u on ACE with sid %s "
3326 (unsigned int)se->flags,
3327 sid_string_dbg(&se->trustee),
3332 if (!(se->flags & SEC_ACE_FLAG_OBJECT_INHERIT)) {
3333 /* Doesn't apply to a file - ignore. */
3334 DEBUG(10,("append_parent_acl: file %s "
3335 "ignoring non object "
3336 "inherit flags %u on ACE with sid %s "
3339 (unsigned int)se->flags,
3340 sid_string_dbg(&se->trustee),
3346 if (is_dacl_protected) {
3347 /* If the DACL is protected it means we must
3348 * not overwrite an existing ACE entry with the
3349 * same SID. This is order N^2. Ouch :-(. JRA. */
3351 for (k = 0; k < psd->dacl->num_aces; k++) {
3352 if (sid_equal(&psd->dacl->aces[k].trustee,
3357 if (k < psd->dacl->num_aces) {
3358 /* SID matched. Ignore. */
3359 DEBUG(10,("append_parent_acl: path %s "
3360 "ignoring ACE with protected sid %s "
3363 sid_string_dbg(&se->trustee),
3369 sec_ace_copy(&new_ace[i], se);
3370 if (se->flags & SEC_ACE_FLAG_NO_PROPAGATE_INHERIT) {
3371 new_ace[i].flags &= ~(SEC_ACE_FLAG_VALID_INHERIT);
3373 new_ace[i].flags |= SEC_ACE_FLAG_INHERITED_ACE;
3375 if (fsp->is_directory) {
3377 * Strip off any inherit only. It's applied.
3379 new_ace[i].flags &= ~(SEC_ACE_FLAG_INHERIT_ONLY);
3380 if (se->flags & SEC_ACE_FLAG_NO_PROPAGATE_INHERIT) {
3381 /* No further inheritance. */
3383 ~(SEC_ACE_FLAG_CONTAINER_INHERIT|
3384 SEC_ACE_FLAG_OBJECT_INHERIT);
3388 * Strip off any container or inherit
3389 * flags, they can't apply to objects.
3391 new_ace[i].flags &= ~(SEC_ACE_FLAG_CONTAINER_INHERIT|
3392 SEC_ACE_FLAG_INHERIT_ONLY|
3393 SEC_ACE_FLAG_NO_PROPAGATE_INHERIT);
3397 DEBUG(10,("append_parent_acl: path %s "
3398 "inheriting ACE with sid %s "
3401 sid_string_dbg(&se->trustee),
3405 psd->dacl->aces = new_ace;
3406 psd->dacl->num_aces = i;
3407 psd->type &= ~(SE_DESC_DACL_AUTO_INHERITED|
3408 SE_DESC_DACL_AUTO_INHERIT_REQ);
3414 /****************************************************************************
3415 Reply to set a security descriptor on an fsp. security_info_sent is the
3416 description of the following NT ACL.
3417 This should be the only external function needed for the UNIX style set ACL.
3418 ****************************************************************************/
3420 NTSTATUS set_nt_acl(files_struct *fsp, uint32 security_info_sent, const SEC_DESC *psd)
3422 connection_struct *conn = fsp->conn;
3423 uid_t user = (uid_t)-1;
3424 gid_t grp = (gid_t)-1;
3425 SMB_STRUCT_STAT sbuf;
3426 DOM_SID file_owner_sid;
3427 DOM_SID file_grp_sid;
3428 canon_ace *file_ace_list = NULL;
3429 canon_ace *dir_ace_list = NULL;
3430 bool acl_perms = False;
3431 mode_t orig_mode = (mode_t)0;
3435 bool need_chown = False;
3437 DEBUG(10,("set_nt_acl: called for file %s\n", fsp->fsp_name ));
3439 if (!CAN_WRITE(conn)) {
3440 DEBUG(10,("set acl rejected on read-only share\n"));
3441 return NT_STATUS_MEDIA_WRITE_PROTECTED;
3445 * Get the current state of the file.
3448 if(fsp->is_directory || fsp->fh->fd == -1) {
3449 if(SMB_VFS_STAT(fsp->conn,fsp->fsp_name, &sbuf) != 0)
3450 return map_nt_error_from_unix(errno);
3452 if(SMB_VFS_FSTAT(fsp, &sbuf) != 0)
3453 return map_nt_error_from_unix(errno);
3456 /* Save the original elements we check against. */
3457 orig_mode = sbuf.st_mode;
3458 orig_uid = sbuf.st_uid;
3459 orig_gid = sbuf.st_gid;
3462 * Unpack the user/group/world id's.
3465 status = unpack_nt_owners( SNUM(conn), &user, &grp, security_info_sent, psd);
3466 if (!NT_STATUS_IS_OK(status)) {
3471 * Do we need to chown ?
3474 if (((user != (uid_t)-1) && (orig_uid != user)) || (( grp != (gid_t)-1) && (orig_gid != grp))) {
3478 if (need_chown && (user == (uid_t)-1 || user == current_user.ut.uid)) {
3480 DEBUG(3,("set_nt_acl: chown %s. uid = %u, gid = %u.\n",
3481 fsp->fsp_name, (unsigned int)user, (unsigned int)grp ));
3483 if(try_chown( fsp->conn, fsp->fsp_name, user, grp) == -1) {
3484 DEBUG(3,("set_nt_acl: chown %s, %u, %u failed. Error = %s.\n",
3485 fsp->fsp_name, (unsigned int)user, (unsigned int)grp, strerror(errno) ));
3486 if (errno == EPERM) {
3487 return NT_STATUS_INVALID_OWNER;
3489 return map_nt_error_from_unix(errno);
3493 * Recheck the current state of the file, which may have changed.
3494 * (suid/sgid bits, for instance)
3497 if(fsp->is_directory) {
3498 if(SMB_VFS_STAT(fsp->conn, fsp->fsp_name, &sbuf) != 0) {
3499 return map_nt_error_from_unix(errno);
3505 if(fsp->fh->fd == -1)
3506 ret = SMB_VFS_STAT(fsp->conn, fsp->fsp_name, &sbuf);
3508 ret = SMB_VFS_FSTAT(fsp, &sbuf);
3511 return map_nt_error_from_unix(errno);
3514 /* Save the original elements we check against. */
3515 orig_mode = sbuf.st_mode;
3516 orig_uid = sbuf.st_uid;
3517 orig_gid = sbuf.st_gid;
3519 /* We did chown already, drop the flag */
3523 create_file_sids(&sbuf, &file_owner_sid, &file_grp_sid);
3525 if ((security_info_sent & DACL_SECURITY_INFORMATION) &&
3526 psd->dacl != NULL &&
3527 (psd->type & (SE_DESC_DACL_AUTO_INHERITED|
3528 SE_DESC_DACL_AUTO_INHERIT_REQ))==
3529 (SE_DESC_DACL_AUTO_INHERITED|
3530 SE_DESC_DACL_AUTO_INHERIT_REQ) ) {
3531 SEC_DESC *new_sd = NULL;
3532 status = append_parent_acl(fsp, psd, &new_sd);
3533 if (!NT_STATUS_IS_OK(status)) {
3539 acl_perms = unpack_canon_ace( fsp, &sbuf, &file_owner_sid, &file_grp_sid,
3540 &file_ace_list, &dir_ace_list, security_info_sent, psd);
3542 /* Ignore W2K traverse DACL set. */
3543 if (file_ace_list || dir_ace_list) {
3546 DEBUG(3,("set_nt_acl: cannot set permissions\n"));
3547 free_canon_ace_list(file_ace_list);
3548 free_canon_ace_list(dir_ace_list);
3549 return NT_STATUS_ACCESS_DENIED;
3553 * Only change security if we got a DACL.
3556 if((security_info_sent & DACL_SECURITY_INFORMATION) && (psd->dacl != NULL)) {
3558 bool acl_set_support = False;
3562 * Try using the POSIX ACL set first. Fall back to chmod if
3563 * we have no ACL support on this filesystem.
3566 if (acl_perms && file_ace_list) {
3567 ret = set_canon_ace_list(fsp, file_ace_list, False, sbuf.st_gid, &acl_set_support);
3568 if (acl_set_support && ret == False) {
3569 DEBUG(3,("set_nt_acl: failed to set file acl on file %s (%s).\n", fsp->fsp_name, strerror(errno) ));
3570 free_canon_ace_list(file_ace_list);
3571 free_canon_ace_list(dir_ace_list);
3572 return map_nt_error_from_unix(errno);
3576 if (acl_perms && acl_set_support && fsp->is_directory) {
3578 if (!set_canon_ace_list(fsp, dir_ace_list, True, sbuf.st_gid, &acl_set_support)) {
3579 DEBUG(3,("set_nt_acl: failed to set default acl on directory %s (%s).\n", fsp->fsp_name, strerror(errno) ));
3580 free_canon_ace_list(file_ace_list);
3581 free_canon_ace_list(dir_ace_list);
3582 return map_nt_error_from_unix(errno);
3587 * No default ACL - delete one if it exists.
3590 if (SMB_VFS_SYS_ACL_DELETE_DEF_FILE(conn, fsp->fsp_name) == -1) {
3593 if (acl_group_override(conn, sbuf.st_gid, fsp->fsp_name)) {
3594 DEBUG(5,("set_nt_acl: acl group control on and "
3595 "current user in file %s primary group. Override delete_def_acl\n",
3599 sret = SMB_VFS_SYS_ACL_DELETE_DEF_FILE(conn, fsp->fsp_name);
3604 DEBUG(3,("set_nt_acl: sys_acl_delete_def_file failed (%s)\n", strerror(errno)));
3605 free_canon_ace_list(file_ace_list);
3606 free_canon_ace_list(dir_ace_list);
3607 return map_nt_error_from_unix(errno);
3613 if (acl_set_support) {
3614 store_inheritance_attributes(fsp, file_ace_list, dir_ace_list,
3615 (psd->type & SE_DESC_DACL_PROTECTED) ? True : False);
3619 * If we cannot set using POSIX ACLs we fall back to checking if we need to chmod.
3622 if(!acl_set_support && acl_perms) {
3625 if (!convert_canon_ace_to_posix_perms( fsp, file_ace_list, &posix_perms)) {
3626 free_canon_ace_list(file_ace_list);
3627 free_canon_ace_list(dir_ace_list);
3628 DEBUG(3,("set_nt_acl: failed to convert file acl to posix permissions for file %s.\n",
3630 return NT_STATUS_ACCESS_DENIED;
3633 if (orig_mode != posix_perms) {
3635 DEBUG(3,("set_nt_acl: chmod %s. perms = 0%o.\n",
3636 fsp->fsp_name, (unsigned int)posix_perms ));
3638 if(SMB_VFS_CHMOD(conn,fsp->fsp_name, posix_perms) == -1) {
3640 if (acl_group_override(conn, sbuf.st_gid, fsp->fsp_name)) {
3641 DEBUG(5,("set_nt_acl: acl group control on and "
3642 "current user in file %s primary group. Override chmod\n",
3646 sret = SMB_VFS_CHMOD(conn,fsp->fsp_name, posix_perms);
3651 DEBUG(3,("set_nt_acl: chmod %s, 0%o failed. Error = %s.\n",
3652 fsp->fsp_name, (unsigned int)posix_perms, strerror(errno) ));
3653 free_canon_ace_list(file_ace_list);
3654 free_canon_ace_list(dir_ace_list);
3655 return map_nt_error_from_unix(errno);
3662 free_canon_ace_list(file_ace_list);
3663 free_canon_ace_list(dir_ace_list);
3666 /* Any chown pending? */
3668 DEBUG(3,("set_nt_acl: chown %s. uid = %u, gid = %u.\n",
3669 fsp->fsp_name, (unsigned int)user, (unsigned int)grp ));
3671 if(try_chown( fsp->conn, fsp->fsp_name, user, grp) == -1) {
3672 DEBUG(3,("set_nt_acl: chown %s, %u, %u failed. Error = %s.\n",
3673 fsp->fsp_name, (unsigned int)user, (unsigned int)grp, strerror(errno) ));
3674 if (errno == EPERM) {
3675 return NT_STATUS_INVALID_OWNER;
3677 return map_nt_error_from_unix(errno);
3681 return NT_STATUS_OK;
3684 /****************************************************************************
3685 Get the actual group bits stored on a file with an ACL. Has no effect if
3686 the file has no ACL. Needed in dosmode code where the stat() will return
3687 the mask bits, not the real group bits, for a file with an ACL.
3688 ****************************************************************************/
3690 int get_acl_group_bits( connection_struct *conn, const char *fname, mode_t *mode )
3692 int entry_id = SMB_ACL_FIRST_ENTRY;
3693 SMB_ACL_ENTRY_T entry;
3694 SMB_ACL_T posix_acl;
3697 posix_acl = SMB_VFS_SYS_ACL_GET_FILE(conn, fname, SMB_ACL_TYPE_ACCESS);
3698 if (posix_acl == (SMB_ACL_T)NULL)
3701 while (SMB_VFS_SYS_ACL_GET_ENTRY(conn, posix_acl, entry_id, &entry) == 1) {
3702 SMB_ACL_TAG_T tagtype;
3703 SMB_ACL_PERMSET_T permset;
3705 entry_id = SMB_ACL_NEXT_ENTRY;
3707 if (SMB_VFS_SYS_ACL_GET_TAG_TYPE(conn, entry, &tagtype) ==-1)
3710 if (tagtype == SMB_ACL_GROUP_OBJ) {
3711 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, entry, &permset) == -1) {
3714 *mode &= ~(S_IRGRP|S_IWGRP|S_IXGRP);
3715 *mode |= (SMB_VFS_SYS_ACL_GET_PERM(conn, permset, SMB_ACL_READ) ? S_IRGRP : 0);
3716 *mode |= (SMB_VFS_SYS_ACL_GET_PERM(conn, permset, SMB_ACL_WRITE) ? S_IWGRP : 0);
3717 *mode |= (SMB_VFS_SYS_ACL_GET_PERM(conn, permset, SMB_ACL_EXECUTE) ? S_IXGRP : 0);
3723 SMB_VFS_SYS_ACL_FREE_ACL(conn, posix_acl);
3727 /****************************************************************************
3728 Do a chmod by setting the ACL USER_OBJ, GROUP_OBJ and OTHER bits in an ACL
3729 and set the mask to rwx. Needed to preserve complex ACLs set by NT.
3730 ****************************************************************************/
3732 static int chmod_acl_internals( connection_struct *conn, SMB_ACL_T posix_acl, mode_t mode)
3734 int entry_id = SMB_ACL_FIRST_ENTRY;
3735 SMB_ACL_ENTRY_T entry;
3736 int num_entries = 0;
3738 while ( SMB_VFS_SYS_ACL_GET_ENTRY(conn, posix_acl, entry_id, &entry) == 1) {
3739 SMB_ACL_TAG_T tagtype;
3740 SMB_ACL_PERMSET_T permset;
3743 entry_id = SMB_ACL_NEXT_ENTRY;
3745 if (SMB_VFS_SYS_ACL_GET_TAG_TYPE(conn, entry, &tagtype) == -1)
3748 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, entry, &permset) == -1)
3754 case SMB_ACL_USER_OBJ:
3755 perms = unix_perms_to_acl_perms(mode, S_IRUSR, S_IWUSR, S_IXUSR);
3757 case SMB_ACL_GROUP_OBJ:
3758 perms = unix_perms_to_acl_perms(mode, S_IRGRP, S_IWGRP, S_IXGRP);
3762 * FIXME: The ACL_MASK entry permissions should really be set to
3763 * the union of the permissions of all ACL_USER,
3764 * ACL_GROUP_OBJ, and ACL_GROUP entries. That's what
3765 * acl_calc_mask() does, but Samba ACLs doesn't provide it.
3767 perms = S_IRUSR|S_IWUSR|S_IXUSR;
3770 perms = unix_perms_to_acl_perms(mode, S_IROTH, S_IWOTH, S_IXOTH);
3776 if (map_acl_perms_to_permset(conn, perms, &permset) == -1)
3779 if (SMB_VFS_SYS_ACL_SET_PERMSET(conn, entry, permset) == -1)
3784 * If this is a simple 3 element ACL or no elements then it's a standard
3785 * UNIX permission set. Just use chmod...
3788 if ((num_entries == 3) || (num_entries == 0))
3794 /****************************************************************************
3795 Get the access ACL of FROM, do a chmod by setting the ACL USER_OBJ,
3796 GROUP_OBJ and OTHER bits in an ACL and set the mask to rwx. Set the
3797 resulting ACL on TO. Note that name is in UNIX character set.
3798 ****************************************************************************/
3800 static int copy_access_posix_acl(connection_struct *conn, const char *from, const char *to, mode_t mode)
3802 SMB_ACL_T posix_acl = NULL;
3805 if ((posix_acl = SMB_VFS_SYS_ACL_GET_FILE(conn, from, SMB_ACL_TYPE_ACCESS)) == NULL)
3808 if ((ret = chmod_acl_internals(conn, posix_acl, mode)) == -1)
3811 ret = SMB_VFS_SYS_ACL_SET_FILE(conn, to, SMB_ACL_TYPE_ACCESS, posix_acl);
3815 SMB_VFS_SYS_ACL_FREE_ACL(conn, posix_acl);
3819 /****************************************************************************
3820 Do a chmod by setting the ACL USER_OBJ, GROUP_OBJ and OTHER bits in an ACL
3821 and set the mask to rwx. Needed to preserve complex ACLs set by NT.
3822 Note that name is in UNIX character set.
3823 ****************************************************************************/
3825 int chmod_acl(connection_struct *conn, const char *name, mode_t mode)
3827 return copy_access_posix_acl(conn, name, name, mode);
3830 /****************************************************************************
3831 Check for an existing default POSIX ACL on a directory.
3832 ****************************************************************************/
3834 static bool directory_has_default_posix_acl(connection_struct *conn, const char *fname)
3836 SMB_ACL_T def_acl = SMB_VFS_SYS_ACL_GET_FILE( conn, fname, SMB_ACL_TYPE_DEFAULT);
3837 bool has_acl = False;
3838 SMB_ACL_ENTRY_T entry;
3840 if (def_acl != NULL && (SMB_VFS_SYS_ACL_GET_ENTRY(conn, def_acl, SMB_ACL_FIRST_ENTRY, &entry) == 1)) {
3845 SMB_VFS_SYS_ACL_FREE_ACL(conn, def_acl);
3850 /****************************************************************************
3851 If the parent directory has no default ACL but it does have an Access ACL,
3852 inherit this Access ACL to file name.
3853 ****************************************************************************/
3855 int inherit_access_posix_acl(connection_struct *conn, const char *inherit_from_dir,
3856 const char *name, mode_t mode)
3858 if (directory_has_default_posix_acl(conn, inherit_from_dir))
3861 return copy_access_posix_acl(conn, inherit_from_dir, name, mode);
3864 /****************************************************************************
3865 Do an fchmod by setting the ACL USER_OBJ, GROUP_OBJ and OTHER bits in an ACL
3866 and set the mask to rwx. Needed to preserve complex ACLs set by NT.
3867 ****************************************************************************/
3869 int fchmod_acl(files_struct *fsp, mode_t mode)
3871 connection_struct *conn = fsp->conn;
3872 SMB_ACL_T posix_acl = NULL;
3875 if ((posix_acl = SMB_VFS_SYS_ACL_GET_FD(fsp)) == NULL)
3878 if ((ret = chmod_acl_internals(conn, posix_acl, mode)) == -1)
3881 ret = SMB_VFS_SYS_ACL_SET_FD(fsp, posix_acl);
3885 SMB_VFS_SYS_ACL_FREE_ACL(conn, posix_acl);
3889 /****************************************************************************
3890 Map from wire type to permset.
3891 ****************************************************************************/
3893 static bool unix_ex_wire_to_permset(connection_struct *conn, unsigned char wire_perm, SMB_ACL_PERMSET_T *p_permset)
3895 if (wire_perm & ~(SMB_POSIX_ACL_READ|SMB_POSIX_ACL_WRITE|SMB_POSIX_ACL_EXECUTE)) {
3899 if (SMB_VFS_SYS_ACL_CLEAR_PERMS(conn, *p_permset) == -1) {
3903 if (wire_perm & SMB_POSIX_ACL_READ) {
3904 if (SMB_VFS_SYS_ACL_ADD_PERM(conn, *p_permset, SMB_ACL_READ) == -1) {
3908 if (wire_perm & SMB_POSIX_ACL_WRITE) {
3909 if (SMB_VFS_SYS_ACL_ADD_PERM(conn, *p_permset, SMB_ACL_WRITE) == -1) {
3913 if (wire_perm & SMB_POSIX_ACL_EXECUTE) {
3914 if (SMB_VFS_SYS_ACL_ADD_PERM(conn, *p_permset, SMB_ACL_EXECUTE) == -1) {
3921 /****************************************************************************
3922 Map from wire type to tagtype.
3923 ****************************************************************************/
3925 static bool unix_ex_wire_to_tagtype(unsigned char wire_tt, SMB_ACL_TAG_T *p_tt)
3928 case SMB_POSIX_ACL_USER_OBJ:
3929 *p_tt = SMB_ACL_USER_OBJ;
3931 case SMB_POSIX_ACL_USER:
3932 *p_tt = SMB_ACL_USER;
3934 case SMB_POSIX_ACL_GROUP_OBJ:
3935 *p_tt = SMB_ACL_GROUP_OBJ;
3937 case SMB_POSIX_ACL_GROUP:
3938 *p_tt = SMB_ACL_GROUP;
3940 case SMB_POSIX_ACL_MASK:
3941 *p_tt = SMB_ACL_MASK;
3943 case SMB_POSIX_ACL_OTHER:
3944 *p_tt = SMB_ACL_OTHER;
3952 /****************************************************************************
3953 Create a new POSIX acl from wire permissions.
3954 FIXME ! How does the share mask/mode fit into this.... ?
3955 ****************************************************************************/
3957 static SMB_ACL_T create_posix_acl_from_wire(connection_struct *conn, uint16 num_acls, const char *pdata)
3960 SMB_ACL_T the_acl = SMB_VFS_SYS_ACL_INIT(conn, num_acls);
3962 if (the_acl == NULL) {
3966 for (i = 0; i < num_acls; i++) {
3967 SMB_ACL_ENTRY_T the_entry;
3968 SMB_ACL_PERMSET_T the_permset;
3969 SMB_ACL_TAG_T tag_type;
3971 if (SMB_VFS_SYS_ACL_CREATE_ENTRY(conn, &the_acl, &the_entry) == -1) {
3972 DEBUG(0,("create_posix_acl_from_wire: Failed to create entry %u. (%s)\n",
3973 i, strerror(errno) ));
3977 if (!unix_ex_wire_to_tagtype(CVAL(pdata,(i*SMB_POSIX_ACL_ENTRY_SIZE)), &tag_type)) {
3978 DEBUG(0,("create_posix_acl_from_wire: invalid wire tagtype %u on entry %u.\n",
3979 CVAL(pdata,(i*SMB_POSIX_ACL_ENTRY_SIZE)), i ));
3983 if (SMB_VFS_SYS_ACL_SET_TAG_TYPE(conn, the_entry, tag_type) == -1) {
3984 DEBUG(0,("create_posix_acl_from_wire: Failed to set tagtype on entry %u. (%s)\n",
3985 i, strerror(errno) ));
3989 /* Get the permset pointer from the new ACL entry. */
3990 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, the_entry, &the_permset) == -1) {
3991 DEBUG(0,("create_posix_acl_from_wire: Failed to get permset on entry %u. (%s)\n",
3992 i, strerror(errno) ));
3996 /* Map from wire to permissions. */
3997 if (!unix_ex_wire_to_permset(conn, CVAL(pdata,(i*SMB_POSIX_ACL_ENTRY_SIZE)+1), &the_permset)) {
3998 DEBUG(0,("create_posix_acl_from_wire: invalid permset %u on entry %u.\n",
3999 CVAL(pdata,(i*SMB_POSIX_ACL_ENTRY_SIZE) + 1), i ));
4003 /* Now apply to the new ACL entry. */
4004 if (SMB_VFS_SYS_ACL_SET_PERMSET(conn, the_entry, the_permset) == -1) {
4005 DEBUG(0,("create_posix_acl_from_wire: Failed to add permset on entry %u. (%s)\n",
4006 i, strerror(errno) ));
4010 if (tag_type == SMB_ACL_USER) {
4011 uint32 uidval = IVAL(pdata,(i*SMB_POSIX_ACL_ENTRY_SIZE)+2);
4012 uid_t uid = (uid_t)uidval;
4013 if (SMB_VFS_SYS_ACL_SET_QUALIFIER(conn, the_entry,(void *)&uid) == -1) {
4014 DEBUG(0,("create_posix_acl_from_wire: Failed to set uid %u on entry %u. (%s)\n",
4015 (unsigned int)uid, i, strerror(errno) ));
4020 if (tag_type == SMB_ACL_GROUP) {
4021 uint32 gidval = IVAL(pdata,(i*SMB_POSIX_ACL_ENTRY_SIZE)+2);
4022 gid_t gid = (uid_t)gidval;
4023 if (SMB_VFS_SYS_ACL_SET_QUALIFIER(conn, the_entry,(void *)&gid) == -1) {
4024 DEBUG(0,("create_posix_acl_from_wire: Failed to set gid %u on entry %u. (%s)\n",
4025 (unsigned int)gid, i, strerror(errno) ));
4035 if (the_acl != NULL) {
4036 SMB_VFS_SYS_ACL_FREE_ACL(conn, the_acl);
4041 /****************************************************************************
4042 Calls from UNIX extensions - Default POSIX ACL set.
4043 If num_def_acls == 0 and not a directory just return. If it is a directory
4044 and num_def_acls == 0 then remove the default acl. Else set the default acl
4046 ****************************************************************************/
4048 bool set_unix_posix_default_acl(connection_struct *conn, const char *fname, SMB_STRUCT_STAT *psbuf,
4049 uint16 num_def_acls, const char *pdata)
4051 SMB_ACL_T def_acl = NULL;
4053 if (num_def_acls && !S_ISDIR(psbuf->st_mode)) {
4054 DEBUG(5,("set_unix_posix_default_acl: Can't set default ACL on non-directory file %s\n", fname ));
4059 if (!num_def_acls) {
4060 /* Remove the default ACL. */
4061 if (SMB_VFS_SYS_ACL_DELETE_DEF_FILE(conn, fname) == -1) {
4062 DEBUG(5,("set_unix_posix_default_acl: acl_delete_def_file failed on directory %s (%s)\n",
4063 fname, strerror(errno) ));
4069 if ((def_acl = create_posix_acl_from_wire(conn, num_def_acls, pdata)) == NULL) {
4073 if (SMB_VFS_SYS_ACL_SET_FILE(conn, fname, SMB_ACL_TYPE_DEFAULT, def_acl) == -1) {
4074 DEBUG(5,("set_unix_posix_default_acl: acl_set_file failed on directory %s (%s)\n",
4075 fname, strerror(errno) ));
4076 SMB_VFS_SYS_ACL_FREE_ACL(conn, def_acl);
4080 DEBUG(10,("set_unix_posix_default_acl: set default acl for file %s\n", fname ));
4081 SMB_VFS_SYS_ACL_FREE_ACL(conn, def_acl);
4085 /****************************************************************************
4086 Remove an ACL from a file. As we don't have acl_delete_entry() available
4087 we must read the current acl and copy all entries except MASK, USER and GROUP
4088 to a new acl, then set that. This (at least on Linux) causes any ACL to be
4090 FIXME ! How does the share mask/mode fit into this.... ?
4091 ****************************************************************************/
4093 static bool remove_posix_acl(connection_struct *conn, files_struct *fsp, const char *fname)
4095 SMB_ACL_T file_acl = NULL;
4096 int entry_id = SMB_ACL_FIRST_ENTRY;
4097 SMB_ACL_ENTRY_T entry;
4099 /* Create a new ACL with only 3 entries, u/g/w. */
4100 SMB_ACL_T new_file_acl = SMB_VFS_SYS_ACL_INIT(conn, 3);
4101 SMB_ACL_ENTRY_T user_ent = NULL;
4102 SMB_ACL_ENTRY_T group_ent = NULL;
4103 SMB_ACL_ENTRY_T other_ent = NULL;
4105 if (new_file_acl == NULL) {
4106 DEBUG(5,("remove_posix_acl: failed to init new ACL with 3 entries for file %s.\n", fname));
4110 /* Now create the u/g/w entries. */
4111 if (SMB_VFS_SYS_ACL_CREATE_ENTRY(conn, &new_file_acl, &user_ent) == -1) {
4112 DEBUG(5,("remove_posix_acl: Failed to create user entry for file %s. (%s)\n",
4113 fname, strerror(errno) ));
4116 if (SMB_VFS_SYS_ACL_SET_TAG_TYPE(conn, user_ent, SMB_ACL_USER_OBJ) == -1) {
4117 DEBUG(5,("remove_posix_acl: Failed to set user entry for file %s. (%s)\n",
4118 fname, strerror(errno) ));
4122 if (SMB_VFS_SYS_ACL_CREATE_ENTRY(conn, &new_file_acl, &group_ent) == -1) {
4123 DEBUG(5,("remove_posix_acl: Failed to create group entry for file %s. (%s)\n",
4124 fname, strerror(errno) ));
4127 if (SMB_VFS_SYS_ACL_SET_TAG_TYPE(conn, group_ent, SMB_ACL_GROUP_OBJ) == -1) {
4128 DEBUG(5,("remove_posix_acl: Failed to set group entry for file %s. (%s)\n",
4129 fname, strerror(errno) ));
4133 if (SMB_VFS_SYS_ACL_CREATE_ENTRY(conn, &new_file_acl, &other_ent) == -1) {
4134 DEBUG(5,("remove_posix_acl: Failed to create other entry for file %s. (%s)\n",
4135 fname, strerror(errno) ));
4138 if (SMB_VFS_SYS_ACL_SET_TAG_TYPE(conn, other_ent, SMB_ACL_OTHER) == -1) {
4139 DEBUG(5,("remove_posix_acl: Failed to set other entry for file %s. (%s)\n",
4140 fname, strerror(errno) ));
4144 /* Get the current file ACL. */
4145 if (fsp && fsp->fh->fd != -1) {
4146 file_acl = SMB_VFS_SYS_ACL_GET_FD(fsp);
4148 file_acl = SMB_VFS_SYS_ACL_GET_FILE( conn, fname, SMB_ACL_TYPE_ACCESS);
4151 if (file_acl == NULL) {
4152 /* This is only returned if an error occurred. Even for a file with
4153 no acl a u/g/w acl should be returned. */
4154 DEBUG(5,("remove_posix_acl: failed to get ACL from file %s (%s).\n",
4155 fname, strerror(errno) ));
4159 while ( SMB_VFS_SYS_ACL_GET_ENTRY(conn, file_acl, entry_id, &entry) == 1) {
4160 SMB_ACL_TAG_T tagtype;
4161 SMB_ACL_PERMSET_T permset;
4163 entry_id = SMB_ACL_NEXT_ENTRY;
4165 if (SMB_VFS_SYS_ACL_GET_TAG_TYPE(conn, entry, &tagtype) == -1) {
4166 DEBUG(5,("remove_posix_acl: failed to get tagtype from ACL on file %s (%s).\n",
4167 fname, strerror(errno) ));
4171 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, entry, &permset) == -1) {
4172 DEBUG(5,("remove_posix_acl: failed to get permset from ACL on file %s (%s).\n",
4173 fname, strerror(errno) ));
4177 if (tagtype == SMB_ACL_USER_OBJ) {
4178 if (SMB_VFS_SYS_ACL_SET_PERMSET(conn, user_ent, permset) == -1) {
4179 DEBUG(5,("remove_posix_acl: failed to set permset from ACL on file %s (%s).\n",
4180 fname, strerror(errno) ));
4182 } else if (tagtype == SMB_ACL_GROUP_OBJ) {
4183 if (SMB_VFS_SYS_ACL_SET_PERMSET(conn, group_ent, permset) == -1) {
4184 DEBUG(5,("remove_posix_acl: failed to set permset from ACL on file %s (%s).\n",
4185 fname, strerror(errno) ));
4187 } else if (tagtype == SMB_ACL_OTHER) {
4188 if (SMB_VFS_SYS_ACL_SET_PERMSET(conn, other_ent, permset) == -1) {
4189 DEBUG(5,("remove_posix_acl: failed to set permset from ACL on file %s (%s).\n",
4190 fname, strerror(errno) ));
4195 /* Set the new empty file ACL. */
4196 if (fsp && fsp->fh->fd != -1) {
4197 if (SMB_VFS_SYS_ACL_SET_FD(fsp, new_file_acl) == -1) {
4198 DEBUG(5,("remove_posix_acl: acl_set_file failed on %s (%s)\n",
4199 fname, strerror(errno) ));
4203 if (SMB_VFS_SYS_ACL_SET_FILE(conn, fname, SMB_ACL_TYPE_ACCESS, new_file_acl) == -1) {
4204 DEBUG(5,("remove_posix_acl: acl_set_file failed on %s (%s)\n",
4205 fname, strerror(errno) ));
4215 SMB_VFS_SYS_ACL_FREE_ACL(conn, file_acl);
4218 SMB_VFS_SYS_ACL_FREE_ACL(conn, new_file_acl);
4223 /****************************************************************************
4224 Calls from UNIX extensions - POSIX ACL set.
4225 If num_def_acls == 0 then read/modify/write acl after removing all entries
4226 except SMB_ACL_USER_OBJ, SMB_ACL_GROUP_OBJ, SMB_ACL_OTHER.
4227 ****************************************************************************/
4229 bool set_unix_posix_acl(connection_struct *conn, files_struct *fsp, const char *fname, uint16 num_acls, const char *pdata)
4231 SMB_ACL_T file_acl = NULL;
4234 /* Remove the ACL from the file. */
4235 return remove_posix_acl(conn, fsp, fname);
4238 if ((file_acl = create_posix_acl_from_wire(conn, num_acls, pdata)) == NULL) {
4242 if (fsp && fsp->fh->fd != -1) {
4243 /* The preferred way - use an open fd. */
4244 if (SMB_VFS_SYS_ACL_SET_FD(fsp, file_acl) == -1) {
4245 DEBUG(5,("set_unix_posix_acl: acl_set_file failed on %s (%s)\n",
4246 fname, strerror(errno) ));
4247 SMB_VFS_SYS_ACL_FREE_ACL(conn, file_acl);
4251 if (SMB_VFS_SYS_ACL_SET_FILE(conn, fname, SMB_ACL_TYPE_ACCESS, file_acl) == -1) {
4252 DEBUG(5,("set_unix_posix_acl: acl_set_file failed on %s (%s)\n",
4253 fname, strerror(errno) ));
4254 SMB_VFS_SYS_ACL_FREE_ACL(conn, file_acl);
4259 DEBUG(10,("set_unix_posix_acl: set acl for file %s\n", fname ));
4260 SMB_VFS_SYS_ACL_FREE_ACL(conn, file_acl);
4264 /********************************************************************
4265 Pull the NT ACL from a file on disk or the OpenEventlog() access
4266 check. Caller is responsible for freeing the returned security
4267 descriptor via TALLOC_FREE(). This is designed for dealing with
4268 user space access checks in smbd outside of the VFS. For example,
4269 checking access rights in OpenEventlog().
4271 Assume we are dealing with files (for now)
4272 ********************************************************************/
4274 SEC_DESC *get_nt_acl_no_snum( TALLOC_CTX *ctx, const char *fname)
4276 SEC_DESC *psd, *ret_sd;
4277 connection_struct *conn;
4279 struct fd_handle fh;
4281 conn = TALLOC_ZERO_P(ctx, connection_struct);
4283 DEBUG(0, ("talloc failed\n"));
4287 if (!(conn->params = TALLOC_P(conn, struct share_params))) {
4288 DEBUG(0,("get_nt_acl_no_snum: talloc() failed!\n"));
4293 conn->params->service = -1;
4295 set_conn_connectpath(conn, "/");
4297 if (!smbd_vfs_init(conn)) {
4298 DEBUG(0,("get_nt_acl_no_snum: Unable to create a fake connection struct!\n"));
4299 conn_free_internal( conn );
4303 ZERO_STRUCT( finfo );
4310 finfo.fsp_name = CONST_DISCARD(char *,fname);
4312 if (!NT_STATUS_IS_OK(posix_fget_nt_acl( &finfo, DACL_SECURITY_INFORMATION, &psd))) {
4313 DEBUG(0,("get_nt_acl_no_snum: get_nt_acl returned zero.\n"));
4314 conn_free_internal( conn );
4318 ret_sd = dup_sec_desc( ctx, psd );
4320 conn_free_internal( conn );