2 Unix SMB/CIFS implementation.
3 SMB NT Security Descriptor / Unix permission conversion.
4 Copyright (C) Jeremy Allison 1994-2000.
5 Copyright (C) Andreas Gruenbacher 2002.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>.
23 extern struct current_user current_user;
24 extern const struct generic_mapping file_generic_mapping;
27 #define DBGC_CLASS DBGC_ACLS
29 /****************************************************************************
30 Data structures representing the internal ACE format.
31 ****************************************************************************/
33 enum ace_owner {UID_ACE, GID_ACE, WORLD_ACE};
34 enum ace_attribute {ALLOW_ACE, DENY_ACE}; /* Used for incoming NT ACLS. */
36 typedef union posix_id {
42 typedef struct canon_ace {
43 struct canon_ace *next, *prev;
45 mode_t perms; /* Only use S_I(R|W|X)USR mode bits here. */
47 enum ace_owner owner_type;
48 enum ace_attribute attr;
53 #define ALL_ACE_PERMS (S_IRUSR|S_IWUSR|S_IXUSR)
56 * EA format of user.SAMBA_PAI (Samba_Posix_Acl_Interitance)
59 * | 1 | 1 | 2 | 2 | ....
60 * +------+------+-------------+---------------------+-------------+--------------------+
61 * | vers | flag | num_entries | num_default_entries | ..entries.. | default_entries... |
62 * +------+------+-------------+---------------------+-------------+--------------------+
65 #define PAI_VERSION_OFFSET 0
66 #define PAI_FLAG_OFFSET 1
67 #define PAI_NUM_ENTRIES_OFFSET 2
68 #define PAI_NUM_DEFAULT_ENTRIES_OFFSET 4
69 #define PAI_ENTRIES_BASE 6
72 #define PAI_ACL_FLAG_PROTECTED 0x1
73 #define PAI_ENTRY_LENGTH 5
76 * In memory format of user.SAMBA_PAI attribute.
80 struct pai_entry *next, *prev;
81 enum ace_owner owner_type;
87 unsigned int num_entries;
88 struct pai_entry *entry_list;
89 unsigned int num_def_entries;
90 struct pai_entry *def_entry_list;
93 /************************************************************************
94 Return a uint32 of the pai_entry principal.
95 ************************************************************************/
97 static uint32 get_pai_entry_val(struct pai_entry *paie)
99 switch (paie->owner_type) {
101 DEBUG(10,("get_pai_entry_val: uid = %u\n", (unsigned int)paie->unix_ug.uid ));
102 return (uint32)paie->unix_ug.uid;
104 DEBUG(10,("get_pai_entry_val: gid = %u\n", (unsigned int)paie->unix_ug.gid ));
105 return (uint32)paie->unix_ug.gid;
108 DEBUG(10,("get_pai_entry_val: world ace\n"));
113 /************************************************************************
114 Return a uint32 of the entry principal.
115 ************************************************************************/
117 static uint32 get_entry_val(canon_ace *ace_entry)
119 switch (ace_entry->owner_type) {
121 DEBUG(10,("get_entry_val: uid = %u\n", (unsigned int)ace_entry->unix_ug.uid ));
122 return (uint32)ace_entry->unix_ug.uid;
124 DEBUG(10,("get_entry_val: gid = %u\n", (unsigned int)ace_entry->unix_ug.gid ));
125 return (uint32)ace_entry->unix_ug.gid;
128 DEBUG(10,("get_entry_val: world ace\n"));
133 /************************************************************************
134 Count the inherited entries.
135 ************************************************************************/
137 static unsigned int num_inherited_entries(canon_ace *ace_list)
139 unsigned int num_entries = 0;
141 for (; ace_list; ace_list = ace_list->next)
142 if (ace_list->inherited)
147 /************************************************************************
148 Create the on-disk format. Caller must free.
149 ************************************************************************/
151 static char *create_pai_buf(canon_ace *file_ace_list, canon_ace *dir_ace_list, bool pai_protected, size_t *store_size)
153 char *pai_buf = NULL;
154 canon_ace *ace_list = NULL;
155 char *entry_offset = NULL;
156 unsigned int num_entries = 0;
157 unsigned int num_def_entries = 0;
159 for (ace_list = file_ace_list; ace_list; ace_list = ace_list->next)
160 if (ace_list->inherited)
163 for (ace_list = dir_ace_list; ace_list; ace_list = ace_list->next)
164 if (ace_list->inherited)
167 DEBUG(10,("create_pai_buf: num_entries = %u, num_def_entries = %u\n", num_entries, num_def_entries ));
169 *store_size = PAI_ENTRIES_BASE + ((num_entries + num_def_entries)*PAI_ENTRY_LENGTH);
171 pai_buf = (char *)SMB_MALLOC(*store_size);
176 /* Set up the header. */
177 memset(pai_buf, '\0', PAI_ENTRIES_BASE);
178 SCVAL(pai_buf,PAI_VERSION_OFFSET,PAI_VERSION);
179 SCVAL(pai_buf,PAI_FLAG_OFFSET,(pai_protected ? PAI_ACL_FLAG_PROTECTED : 0));
180 SSVAL(pai_buf,PAI_NUM_ENTRIES_OFFSET,num_entries);
181 SSVAL(pai_buf,PAI_NUM_DEFAULT_ENTRIES_OFFSET,num_def_entries);
183 entry_offset = pai_buf + PAI_ENTRIES_BASE;
185 for (ace_list = file_ace_list; ace_list; ace_list = ace_list->next) {
186 if (ace_list->inherited) {
187 uint8 type_val = (unsigned char)ace_list->owner_type;
188 uint32 entry_val = get_entry_val(ace_list);
190 SCVAL(entry_offset,0,type_val);
191 SIVAL(entry_offset,1,entry_val);
192 entry_offset += PAI_ENTRY_LENGTH;
196 for (ace_list = dir_ace_list; ace_list; ace_list = ace_list->next) {
197 if (ace_list->inherited) {
198 uint8 type_val = (unsigned char)ace_list->owner_type;
199 uint32 entry_val = get_entry_val(ace_list);
201 SCVAL(entry_offset,0,type_val);
202 SIVAL(entry_offset,1,entry_val);
203 entry_offset += PAI_ENTRY_LENGTH;
210 /************************************************************************
211 Store the user.SAMBA_PAI attribute on disk.
212 ************************************************************************/
214 static void store_inheritance_attributes(files_struct *fsp, canon_ace *file_ace_list,
215 canon_ace *dir_ace_list, bool pai_protected)
221 if (!lp_map_acl_inherit(SNUM(fsp->conn)))
225 * Don't store if this ACL isn't protected and
226 * none of the entries in it are marked as inherited.
229 if (!pai_protected && num_inherited_entries(file_ace_list) == 0 && num_inherited_entries(dir_ace_list) == 0) {
230 /* Instead just remove the attribute if it exists. */
231 if (fsp->fh->fd != -1)
232 SMB_VFS_FREMOVEXATTR(fsp, fsp->fh->fd, SAMBA_POSIX_INHERITANCE_EA_NAME);
234 SMB_VFS_REMOVEXATTR(fsp->conn, fsp->fsp_name, SAMBA_POSIX_INHERITANCE_EA_NAME);
238 pai_buf = create_pai_buf(file_ace_list, dir_ace_list, pai_protected, &store_size);
240 if (fsp->fh->fd != -1)
241 ret = SMB_VFS_FSETXATTR(fsp, fsp->fh->fd, SAMBA_POSIX_INHERITANCE_EA_NAME,
242 pai_buf, store_size, 0);
244 ret = SMB_VFS_SETXATTR(fsp->conn,fsp->fsp_name, SAMBA_POSIX_INHERITANCE_EA_NAME,
245 pai_buf, store_size, 0);
249 DEBUG(10,("store_inheritance_attribute:%s for file %s\n", pai_protected ? " (protected)" : "", fsp->fsp_name));
250 if (ret == -1 && !no_acl_syscall_error(errno))
251 DEBUG(1,("store_inheritance_attribute: Error %s\n", strerror(errno) ));
254 /************************************************************************
255 Delete the in memory inheritance info.
256 ************************************************************************/
258 static void free_inherited_info(struct pai_val *pal)
261 struct pai_entry *paie, *paie_next;
262 for (paie = pal->entry_list; paie; paie = paie_next) {
263 paie_next = paie->next;
266 for (paie = pal->def_entry_list; paie; paie = paie_next) {
267 paie_next = paie->next;
274 /************************************************************************
275 Was this ACL protected ?
276 ************************************************************************/
278 static bool get_protected_flag(struct pai_val *pal)
282 return pal->pai_protected;
285 /************************************************************************
286 Was this ACE inherited ?
287 ************************************************************************/
289 static bool get_inherited_flag(struct pai_val *pal, canon_ace *ace_entry, bool default_ace)
291 struct pai_entry *paie;
296 /* If the entry exists it is inherited. */
297 for (paie = (default_ace ? pal->def_entry_list : pal->entry_list); paie; paie = paie->next) {
298 if (ace_entry->owner_type == paie->owner_type &&
299 get_entry_val(ace_entry) == get_pai_entry_val(paie))
305 /************************************************************************
306 Ensure an attribute just read is valid.
307 ************************************************************************/
309 static bool check_pai_ok(char *pai_buf, size_t pai_buf_data_size)
312 uint16 num_def_entries;
314 if (pai_buf_data_size < PAI_ENTRIES_BASE) {
315 /* Corrupted - too small. */
319 if (CVAL(pai_buf,PAI_VERSION_OFFSET) != PAI_VERSION)
322 num_entries = SVAL(pai_buf,PAI_NUM_ENTRIES_OFFSET);
323 num_def_entries = SVAL(pai_buf,PAI_NUM_DEFAULT_ENTRIES_OFFSET);
325 /* Check the entry lists match. */
326 /* Each entry is 5 bytes (type plus 4 bytes of uid or gid). */
328 if (((num_entries + num_def_entries)*PAI_ENTRY_LENGTH) + PAI_ENTRIES_BASE != pai_buf_data_size)
335 /************************************************************************
336 Convert to in-memory format.
337 ************************************************************************/
339 static struct pai_val *create_pai_val(char *buf, size_t size)
342 struct pai_val *paiv = NULL;
345 if (!check_pai_ok(buf, size))
348 paiv = SMB_MALLOC_P(struct pai_val);
352 memset(paiv, '\0', sizeof(struct pai_val));
354 paiv->pai_protected = (CVAL(buf,PAI_FLAG_OFFSET) == PAI_ACL_FLAG_PROTECTED);
356 paiv->num_entries = SVAL(buf,PAI_NUM_ENTRIES_OFFSET);
357 paiv->num_def_entries = SVAL(buf,PAI_NUM_DEFAULT_ENTRIES_OFFSET);
359 entry_offset = buf + PAI_ENTRIES_BASE;
361 DEBUG(10,("create_pai_val:%s num_entries = %u, num_def_entries = %u\n",
362 paiv->pai_protected ? " (pai_protected)" : "", paiv->num_entries, paiv->num_def_entries ));
364 for (i = 0; i < paiv->num_entries; i++) {
365 struct pai_entry *paie;
367 paie = SMB_MALLOC_P(struct pai_entry);
369 free_inherited_info(paiv);
373 paie->owner_type = (enum ace_owner)CVAL(entry_offset,0);
374 switch( paie->owner_type) {
376 paie->unix_ug.uid = (uid_t)IVAL(entry_offset,1);
377 DEBUG(10,("create_pai_val: uid = %u\n", (unsigned int)paie->unix_ug.uid ));
380 paie->unix_ug.gid = (gid_t)IVAL(entry_offset,1);
381 DEBUG(10,("create_pai_val: gid = %u\n", (unsigned int)paie->unix_ug.gid ));
384 paie->unix_ug.world = -1;
385 DEBUG(10,("create_pai_val: world ace\n"));
388 free_inherited_info(paiv);
391 entry_offset += PAI_ENTRY_LENGTH;
392 DLIST_ADD(paiv->entry_list, paie);
395 for (i = 0; i < paiv->num_def_entries; i++) {
396 struct pai_entry *paie;
398 paie = SMB_MALLOC_P(struct pai_entry);
400 free_inherited_info(paiv);
404 paie->owner_type = (enum ace_owner)CVAL(entry_offset,0);
405 switch( paie->owner_type) {
407 paie->unix_ug.uid = (uid_t)IVAL(entry_offset,1);
408 DEBUG(10,("create_pai_val: (def) uid = %u\n", (unsigned int)paie->unix_ug.uid ));
411 paie->unix_ug.gid = (gid_t)IVAL(entry_offset,1);
412 DEBUG(10,("create_pai_val: (def) gid = %u\n", (unsigned int)paie->unix_ug.gid ));
415 paie->unix_ug.world = -1;
416 DEBUG(10,("create_pai_val: (def) world ace\n"));
419 free_inherited_info(paiv);
422 entry_offset += PAI_ENTRY_LENGTH;
423 DLIST_ADD(paiv->def_entry_list, paie);
429 /************************************************************************
430 Load the user.SAMBA_PAI attribute.
431 ************************************************************************/
433 static struct pai_val *load_inherited_info(files_struct *fsp)
436 size_t pai_buf_size = 1024;
437 struct pai_val *paiv = NULL;
440 if (!lp_map_acl_inherit(SNUM(fsp->conn)))
443 if ((pai_buf = (char *)SMB_MALLOC(pai_buf_size)) == NULL)
447 if (fsp->fh->fd != -1)
448 ret = SMB_VFS_FGETXATTR(fsp, fsp->fh->fd, SAMBA_POSIX_INHERITANCE_EA_NAME,
449 pai_buf, pai_buf_size);
451 ret = SMB_VFS_GETXATTR(fsp->conn,fsp->fsp_name,SAMBA_POSIX_INHERITANCE_EA_NAME,
452 pai_buf, pai_buf_size);
455 if (errno != ERANGE) {
458 /* Buffer too small - enlarge it. */
461 if (pai_buf_size > 1024*1024) {
462 return NULL; /* Limit malloc to 1mb. */
464 if ((pai_buf = (char *)SMB_MALLOC(pai_buf_size)) == NULL)
469 DEBUG(10,("load_inherited_info: ret = %lu for file %s\n", (unsigned long)ret, fsp->fsp_name));
472 /* No attribute or not supported. */
474 if (errno != ENOATTR)
475 DEBUG(10,("load_inherited_info: Error %s\n", strerror(errno) ));
478 DEBUG(10,("load_inherited_info: Error %s\n", strerror(errno) ));
484 paiv = create_pai_val(pai_buf, ret);
486 if (paiv && paiv->pai_protected)
487 DEBUG(10,("load_inherited_info: ACL is protected for file %s\n", fsp->fsp_name));
493 /****************************************************************************
494 Functions to manipulate the internal ACE format.
495 ****************************************************************************/
497 /****************************************************************************
498 Count a linked list of canonical ACE entries.
499 ****************************************************************************/
501 static size_t count_canon_ace_list( canon_ace *list_head )
506 for (ace = list_head; ace; ace = ace->next)
512 /****************************************************************************
513 Free a linked list of canonical ACE entries.
514 ****************************************************************************/
516 static void free_canon_ace_list( canon_ace *list_head )
518 canon_ace *list, *next;
520 for (list = list_head; list; list = next) {
522 DLIST_REMOVE(list_head, list);
527 /****************************************************************************
528 Function to duplicate a canon_ace entry.
529 ****************************************************************************/
531 static canon_ace *dup_canon_ace( canon_ace *src_ace)
533 canon_ace *dst_ace = SMB_MALLOC_P(canon_ace);
539 dst_ace->prev = dst_ace->next = NULL;
543 /****************************************************************************
544 Print out a canon ace.
545 ****************************************************************************/
547 static void print_canon_ace(canon_ace *pace, int num)
551 dbgtext( "canon_ace index %d. Type = %s ", num, pace->attr == ALLOW_ACE ? "allow" : "deny" );
552 dbgtext( "SID = %s ", sid_to_string( str, &pace->trustee));
553 if (pace->owner_type == UID_ACE) {
554 const char *u_name = uidtoname(pace->unix_ug.uid);
555 dbgtext( "uid %u (%s) ", (unsigned int)pace->unix_ug.uid, u_name );
556 } else if (pace->owner_type == GID_ACE) {
557 char *g_name = gidtoname(pace->unix_ug.gid);
558 dbgtext( "gid %u (%s) ", (unsigned int)pace->unix_ug.gid, g_name );
561 switch (pace->type) {
563 dbgtext( "SMB_ACL_USER ");
565 case SMB_ACL_USER_OBJ:
566 dbgtext( "SMB_ACL_USER_OBJ ");
569 dbgtext( "SMB_ACL_GROUP ");
571 case SMB_ACL_GROUP_OBJ:
572 dbgtext( "SMB_ACL_GROUP_OBJ ");
575 dbgtext( "SMB_ACL_OTHER ");
582 dbgtext( "(inherited) ");
584 dbgtext( "%c", pace->perms & S_IRUSR ? 'r' : '-');
585 dbgtext( "%c", pace->perms & S_IWUSR ? 'w' : '-');
586 dbgtext( "%c\n", pace->perms & S_IXUSR ? 'x' : '-');
589 /****************************************************************************
590 Print out a canon ace list.
591 ****************************************************************************/
593 static void print_canon_ace_list(const char *name, canon_ace *ace_list)
597 if( DEBUGLVL( 10 )) {
598 dbgtext( "print_canon_ace_list: %s\n", name );
599 for (;ace_list; ace_list = ace_list->next, count++)
600 print_canon_ace(ace_list, count );
604 /****************************************************************************
605 Map POSIX ACL perms to canon_ace permissions (a mode_t containing only S_(R|W|X)USR bits).
606 ****************************************************************************/
608 static mode_t convert_permset_to_mode_t(connection_struct *conn, SMB_ACL_PERMSET_T permset)
612 ret |= (SMB_VFS_SYS_ACL_GET_PERM(conn, permset, SMB_ACL_READ) ? S_IRUSR : 0);
613 ret |= (SMB_VFS_SYS_ACL_GET_PERM(conn, permset, SMB_ACL_WRITE) ? S_IWUSR : 0);
614 ret |= (SMB_VFS_SYS_ACL_GET_PERM(conn, permset, SMB_ACL_EXECUTE) ? S_IXUSR : 0);
619 /****************************************************************************
620 Map generic UNIX permissions to canon_ace permissions (a mode_t containing only S_(R|W|X)USR bits).
621 ****************************************************************************/
623 static mode_t unix_perms_to_acl_perms(mode_t mode, int r_mask, int w_mask, int x_mask)
637 /****************************************************************************
638 Map canon_ace permissions (a mode_t containing only S_(R|W|X)USR bits) to
639 an SMB_ACL_PERMSET_T.
640 ****************************************************************************/
642 static int map_acl_perms_to_permset(connection_struct *conn, mode_t mode, SMB_ACL_PERMSET_T *p_permset)
644 if (SMB_VFS_SYS_ACL_CLEAR_PERMS(conn, *p_permset) == -1)
646 if (mode & S_IRUSR) {
647 if (SMB_VFS_SYS_ACL_ADD_PERM(conn, *p_permset, SMB_ACL_READ) == -1)
650 if (mode & S_IWUSR) {
651 if (SMB_VFS_SYS_ACL_ADD_PERM(conn, *p_permset, SMB_ACL_WRITE) == -1)
654 if (mode & S_IXUSR) {
655 if (SMB_VFS_SYS_ACL_ADD_PERM(conn, *p_permset, SMB_ACL_EXECUTE) == -1)
661 /****************************************************************************
662 Function to create owner and group SIDs from a SMB_STRUCT_STAT.
663 ****************************************************************************/
665 static void create_file_sids(const SMB_STRUCT_STAT *psbuf, DOM_SID *powner_sid, DOM_SID *pgroup_sid)
667 uid_to_sid( powner_sid, psbuf->st_uid );
668 gid_to_sid( pgroup_sid, psbuf->st_gid );
671 /****************************************************************************
672 Is the identity in two ACEs equal ? Check both SID and uid/gid.
673 ****************************************************************************/
675 static bool identity_in_ace_equal(canon_ace *ace1, canon_ace *ace2)
677 if (sid_equal(&ace1->trustee, &ace2->trustee)) {
680 if (ace1->owner_type == ace2->owner_type) {
681 if (ace1->owner_type == UID_ACE &&
682 ace1->unix_ug.uid == ace2->unix_ug.uid) {
684 } else if (ace1->owner_type == GID_ACE &&
685 ace1->unix_ug.gid == ace2->unix_ug.gid) {
692 /****************************************************************************
693 Merge aces with a common sid - if both are allow or deny, OR the permissions together and
694 delete the second one. If the first is deny, mask the permissions off and delete the allow
695 if the permissions become zero, delete the deny if the permissions are non zero.
696 ****************************************************************************/
698 static void merge_aces( canon_ace **pp_list_head )
700 canon_ace *list_head = *pp_list_head;
701 canon_ace *curr_ace_outer;
702 canon_ace *curr_ace_outer_next;
705 * First, merge allow entries with identical SIDs, and deny entries
706 * with identical SIDs.
709 for (curr_ace_outer = list_head; curr_ace_outer; curr_ace_outer = curr_ace_outer_next) {
711 canon_ace *curr_ace_next;
713 curr_ace_outer_next = curr_ace_outer->next; /* Save the link in case we delete. */
715 for (curr_ace = curr_ace_outer->next; curr_ace; curr_ace = curr_ace_next) {
717 curr_ace_next = curr_ace->next; /* Save the link in case of delete. */
719 if (identity_in_ace_equal(curr_ace, curr_ace_outer) &&
720 (curr_ace->attr == curr_ace_outer->attr)) {
722 if( DEBUGLVL( 10 )) {
723 dbgtext("merge_aces: Merging ACE's\n");
724 print_canon_ace( curr_ace_outer, 0);
725 print_canon_ace( curr_ace, 0);
728 /* Merge two allow or two deny ACE's. */
730 curr_ace_outer->perms |= curr_ace->perms;
731 DLIST_REMOVE(list_head, curr_ace);
733 curr_ace_outer_next = curr_ace_outer->next; /* We may have deleted the link. */
739 * Now go through and mask off allow permissions with deny permissions.
740 * We can delete either the allow or deny here as we know that each SID
741 * appears only once in the list.
744 for (curr_ace_outer = list_head; curr_ace_outer; curr_ace_outer = curr_ace_outer_next) {
746 canon_ace *curr_ace_next;
748 curr_ace_outer_next = curr_ace_outer->next; /* Save the link in case we delete. */
750 for (curr_ace = curr_ace_outer->next; curr_ace; curr_ace = curr_ace_next) {
752 curr_ace_next = curr_ace->next; /* Save the link in case of delete. */
755 * Subtract ACE's with different entries. Due to the ordering constraints
756 * we've put on the ACL, we know the deny must be the first one.
759 if (identity_in_ace_equal(curr_ace, curr_ace_outer) &&
760 (curr_ace_outer->attr == DENY_ACE) && (curr_ace->attr == ALLOW_ACE)) {
762 if( DEBUGLVL( 10 )) {
763 dbgtext("merge_aces: Masking ACE's\n");
764 print_canon_ace( curr_ace_outer, 0);
765 print_canon_ace( curr_ace, 0);
768 curr_ace->perms &= ~curr_ace_outer->perms;
770 if (curr_ace->perms == 0) {
773 * The deny overrides the allow. Remove the allow.
776 DLIST_REMOVE(list_head, curr_ace);
778 curr_ace_outer_next = curr_ace_outer->next; /* We may have deleted the link. */
783 * Even after removing permissions, there
784 * are still allow permissions - delete the deny.
785 * It is safe to delete the deny here,
786 * as we are guarenteed by the deny first
787 * ordering that all the deny entries for
788 * this SID have already been merged into one
789 * before we can get to an allow ace.
792 DLIST_REMOVE(list_head, curr_ace_outer);
793 SAFE_FREE(curr_ace_outer);
798 } /* end for curr_ace */
799 } /* end for curr_ace_outer */
801 /* We may have modified the list. */
803 *pp_list_head = list_head;
806 /****************************************************************************
807 Check if we need to return NT4.x compatible ACL entries.
808 ****************************************************************************/
810 static bool nt4_compatible_acls(void)
812 int compat = lp_acl_compatibility();
814 if (compat == ACL_COMPAT_AUTO) {
815 enum remote_arch_types ra_type = get_remote_arch();
817 /* Automatically adapt to client */
818 return (ra_type <= RA_WINNT);
820 return (compat == ACL_COMPAT_WINNT);
824 /****************************************************************************
825 Map canon_ace perms to permission bits NT.
826 The attr element is not used here - we only process deny entries on set,
827 not get. Deny entries are implicit on get with ace->perms = 0.
828 ****************************************************************************/
830 static SEC_ACCESS map_canon_ace_perms(int snum,
838 *pacl_type = SEC_ACE_TYPE_ACCESS_ALLOWED;
840 if (lp_acl_map_full_control(snum) && ((perms & ALL_ACE_PERMS) == ALL_ACE_PERMS)) {
842 nt_mask = UNIX_DIRECTORY_ACCESS_RWX;
844 nt_mask = UNIX_ACCESS_RWX;
846 } else if ((perms & ALL_ACE_PERMS) == (mode_t)0) {
848 * Windows NT refuses to display ACEs with no permissions in them (but
849 * they are perfectly legal with Windows 2000). If the ACE has empty
850 * permissions we cannot use 0, so we use the otherwise unused
851 * WRITE_OWNER permission, which we ignore when we set an ACL.
852 * We abstract this into a #define of UNIX_ACCESS_NONE to allow this
853 * to be changed in the future.
856 if (nt4_compatible_acls())
857 nt_mask = UNIX_ACCESS_NONE;
862 nt_mask |= ((perms & S_IRUSR) ? UNIX_DIRECTORY_ACCESS_R : 0 );
863 nt_mask |= ((perms & S_IWUSR) ? UNIX_DIRECTORY_ACCESS_W : 0 );
864 nt_mask |= ((perms & S_IXUSR) ? UNIX_DIRECTORY_ACCESS_X : 0 );
866 nt_mask |= ((perms & S_IRUSR) ? UNIX_ACCESS_R : 0 );
867 nt_mask |= ((perms & S_IWUSR) ? UNIX_ACCESS_W : 0 );
868 nt_mask |= ((perms & S_IXUSR) ? UNIX_ACCESS_X : 0 );
872 DEBUG(10,("map_canon_ace_perms: Mapped (UNIX) %x to (NT) %x\n",
873 (unsigned int)perms, (unsigned int)nt_mask ));
875 init_sec_access(&sa,nt_mask);
879 /****************************************************************************
880 Map NT perms to a UNIX mode_t.
881 ****************************************************************************/
883 #define FILE_SPECIFIC_READ_BITS (FILE_READ_DATA|FILE_READ_EA|FILE_READ_ATTRIBUTES)
884 #define FILE_SPECIFIC_WRITE_BITS (FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_WRITE_EA|FILE_WRITE_ATTRIBUTES)
885 #define FILE_SPECIFIC_EXECUTE_BITS (FILE_EXECUTE)
887 static mode_t map_nt_perms( uint32 *mask, int type)
893 if((*mask) & GENERIC_ALL_ACCESS)
894 mode = S_IRUSR|S_IWUSR|S_IXUSR;
896 mode |= ((*mask) & (GENERIC_READ_ACCESS|FILE_SPECIFIC_READ_BITS)) ? S_IRUSR : 0;
897 mode |= ((*mask) & (GENERIC_WRITE_ACCESS|FILE_SPECIFIC_WRITE_BITS)) ? S_IWUSR : 0;
898 mode |= ((*mask) & (GENERIC_EXECUTE_ACCESS|FILE_SPECIFIC_EXECUTE_BITS)) ? S_IXUSR : 0;
902 if((*mask) & GENERIC_ALL_ACCESS)
903 mode = S_IRGRP|S_IWGRP|S_IXGRP;
905 mode |= ((*mask) & (GENERIC_READ_ACCESS|FILE_SPECIFIC_READ_BITS)) ? S_IRGRP : 0;
906 mode |= ((*mask) & (GENERIC_WRITE_ACCESS|FILE_SPECIFIC_WRITE_BITS)) ? S_IWGRP : 0;
907 mode |= ((*mask) & (GENERIC_EXECUTE_ACCESS|FILE_SPECIFIC_EXECUTE_BITS)) ? S_IXGRP : 0;
911 if((*mask) & GENERIC_ALL_ACCESS)
912 mode = S_IROTH|S_IWOTH|S_IXOTH;
914 mode |= ((*mask) & (GENERIC_READ_ACCESS|FILE_SPECIFIC_READ_BITS)) ? S_IROTH : 0;
915 mode |= ((*mask) & (GENERIC_WRITE_ACCESS|FILE_SPECIFIC_WRITE_BITS)) ? S_IWOTH : 0;
916 mode |= ((*mask) & (GENERIC_EXECUTE_ACCESS|FILE_SPECIFIC_EXECUTE_BITS)) ? S_IXOTH : 0;
924 /****************************************************************************
925 Unpack a SEC_DESC into a UNIX owner and group.
926 ****************************************************************************/
928 NTSTATUS unpack_nt_owners(int snum, uid_t *puser, gid_t *pgrp, uint32 security_info_sent, SEC_DESC *psd)
936 if(security_info_sent == 0) {
937 DEBUG(0,("unpack_nt_owners: no security info sent !\n"));
942 * Validate the owner and group SID's.
945 memset(&owner_sid, '\0', sizeof(owner_sid));
946 memset(&grp_sid, '\0', sizeof(grp_sid));
948 DEBUG(5,("unpack_nt_owners: validating owner_sids.\n"));
951 * Don't immediately fail if the owner sid cannot be validated.
952 * This may be a group chown only set.
955 if (security_info_sent & OWNER_SECURITY_INFORMATION) {
956 sid_copy(&owner_sid, psd->owner_sid);
957 if (!sid_to_uid(&owner_sid, puser)) {
958 if (lp_force_unknown_acl_user(snum)) {
959 /* this allows take ownership to work
961 *puser = current_user.ut.uid;
963 DEBUG(3,("unpack_nt_owners: unable to validate"
964 " owner sid for %s\n",
965 sid_string_static(&owner_sid)));
966 return NT_STATUS_INVALID_OWNER;
969 DEBUG(3,("unpack_nt_owners: owner sid mapped to uid %u\n",
970 (unsigned int)*puser ));
974 * Don't immediately fail if the group sid cannot be validated.
975 * This may be an owner chown only set.
978 if (security_info_sent & GROUP_SECURITY_INFORMATION) {
979 sid_copy(&grp_sid, psd->group_sid);
980 if (!sid_to_gid( &grp_sid, pgrp)) {
981 if (lp_force_unknown_acl_user(snum)) {
982 /* this allows take group ownership to work
984 *pgrp = current_user.ut.gid;
986 DEBUG(3,("unpack_nt_owners: unable to validate"
988 return NT_STATUS_INVALID_OWNER;
991 DEBUG(3,("unpack_nt_owners: group sid mapped to gid %u\n",
992 (unsigned int)*pgrp));
995 DEBUG(5,("unpack_nt_owners: owner_sids validated.\n"));
1000 /****************************************************************************
1001 Ensure the enforced permissions for this share apply.
1002 ****************************************************************************/
1004 static void apply_default_perms(const files_struct *fsp, canon_ace *pace, mode_t type)
1006 int snum = SNUM(fsp->conn);
1007 mode_t and_bits = (mode_t)0;
1008 mode_t or_bits = (mode_t)0;
1010 /* Get the initial bits to apply. */
1012 if (fsp->is_directory) {
1013 and_bits = lp_dir_security_mask(snum);
1014 or_bits = lp_force_dir_security_mode(snum);
1016 and_bits = lp_security_mask(snum);
1017 or_bits = lp_force_security_mode(snum);
1020 /* Now bounce them into the S_USR space. */
1023 /* Ensure owner has read access. */
1024 pace->perms |= S_IRUSR;
1025 if (fsp->is_directory)
1026 pace->perms |= (S_IWUSR|S_IXUSR);
1027 and_bits = unix_perms_to_acl_perms(and_bits, S_IRUSR, S_IWUSR, S_IXUSR);
1028 or_bits = unix_perms_to_acl_perms(or_bits, S_IRUSR, S_IWUSR, S_IXUSR);
1031 and_bits = unix_perms_to_acl_perms(and_bits, S_IRGRP, S_IWGRP, S_IXGRP);
1032 or_bits = unix_perms_to_acl_perms(or_bits, S_IRGRP, S_IWGRP, S_IXGRP);
1035 and_bits = unix_perms_to_acl_perms(and_bits, S_IROTH, S_IWOTH, S_IXOTH);
1036 or_bits = unix_perms_to_acl_perms(or_bits, S_IROTH, S_IWOTH, S_IXOTH);
1040 pace->perms = ((pace->perms & and_bits)|or_bits);
1043 /****************************************************************************
1044 Check if a given uid/SID is in a group gid/SID. This is probably very
1045 expensive and will need optimisation. A *lot* of optimisation :-). JRA.
1046 ****************************************************************************/
1048 static bool uid_entry_in_group( canon_ace *uid_ace, canon_ace *group_ace )
1050 const char *u_name = NULL;
1052 /* "Everyone" always matches every uid. */
1054 if (sid_equal(&group_ace->trustee, &global_sid_World))
1057 /* Assume that the current user is in the current group (force group) */
1059 if (uid_ace->unix_ug.uid == current_user.ut.uid && group_ace->unix_ug.gid == current_user.ut.gid)
1062 /* u_name talloc'ed off tos. */
1063 u_name = uidtoname(uid_ace->unix_ug.uid);
1067 return user_in_group_sid(u_name, &group_ace->trustee);
1070 /****************************************************************************
1071 A well formed POSIX file or default ACL has at least 3 entries, a
1072 SMB_ACL_USER_OBJ, SMB_ACL_GROUP_OBJ, SMB_ACL_OTHER_OBJ.
1073 In addition, the owner must always have at least read access.
1074 When using this call on get_acl, the pst struct is valid and contains
1075 the mode of the file. When using this call on set_acl, the pst struct has
1076 been modified to have a mode containing the default for this file or directory
1078 ****************************************************************************/
1080 static bool ensure_canon_entry_valid(canon_ace **pp_ace,
1081 const files_struct *fsp,
1082 const DOM_SID *pfile_owner_sid,
1083 const DOM_SID *pfile_grp_sid,
1084 const SMB_STRUCT_STAT *pst,
1088 bool got_user = False;
1089 bool got_grp = False;
1090 bool got_other = False;
1091 canon_ace *pace_other = NULL;
1093 for (pace = *pp_ace; pace; pace = pace->next) {
1094 if (pace->type == SMB_ACL_USER_OBJ) {
1097 apply_default_perms(fsp, pace, S_IRUSR);
1100 } else if (pace->type == SMB_ACL_GROUP_OBJ) {
1103 * Ensure create mask/force create mode is respected on set.
1107 apply_default_perms(fsp, pace, S_IRGRP);
1110 } else if (pace->type == SMB_ACL_OTHER) {
1113 * Ensure create mask/force create mode is respected on set.
1117 apply_default_perms(fsp, pace, S_IROTH);
1124 if ((pace = SMB_MALLOC_P(canon_ace)) == NULL) {
1125 DEBUG(0,("ensure_canon_entry_valid: malloc fail.\n"));
1130 pace->type = SMB_ACL_USER_OBJ;
1131 pace->owner_type = UID_ACE;
1132 pace->unix_ug.uid = pst->st_uid;
1133 pace->trustee = *pfile_owner_sid;
1134 pace->attr = ALLOW_ACE;
1137 /* See if the owning user is in any of the other groups in
1138 the ACE. If so, OR in the permissions from that group. */
1140 bool group_matched = False;
1141 canon_ace *pace_iter;
1143 for (pace_iter = *pp_ace; pace_iter; pace_iter = pace_iter->next) {
1144 if (pace_iter->type == SMB_ACL_GROUP_OBJ || pace_iter->type == SMB_ACL_GROUP) {
1145 if (uid_entry_in_group(pace, pace_iter)) {
1146 pace->perms |= pace_iter->perms;
1147 group_matched = True;
1152 /* If we only got an "everyone" perm, just use that. */
1153 if (!group_matched) {
1155 pace->perms = pace_other->perms;
1160 apply_default_perms(fsp, pace, S_IRUSR);
1162 pace->perms = unix_perms_to_acl_perms(pst->st_mode, S_IRUSR, S_IWUSR, S_IXUSR);
1165 DLIST_ADD(*pp_ace, pace);
1169 if ((pace = SMB_MALLOC_P(canon_ace)) == NULL) {
1170 DEBUG(0,("ensure_canon_entry_valid: malloc fail.\n"));
1175 pace->type = SMB_ACL_GROUP_OBJ;
1176 pace->owner_type = GID_ACE;
1177 pace->unix_ug.uid = pst->st_gid;
1178 pace->trustee = *pfile_grp_sid;
1179 pace->attr = ALLOW_ACE;
1181 /* If we only got an "everyone" perm, just use that. */
1183 pace->perms = pace_other->perms;
1186 apply_default_perms(fsp, pace, S_IRGRP);
1188 pace->perms = unix_perms_to_acl_perms(pst->st_mode, S_IRGRP, S_IWGRP, S_IXGRP);
1191 DLIST_ADD(*pp_ace, pace);
1195 if ((pace = SMB_MALLOC_P(canon_ace)) == NULL) {
1196 DEBUG(0,("ensure_canon_entry_valid: malloc fail.\n"));
1201 pace->type = SMB_ACL_OTHER;
1202 pace->owner_type = WORLD_ACE;
1203 pace->unix_ug.world = -1;
1204 pace->trustee = global_sid_World;
1205 pace->attr = ALLOW_ACE;
1208 apply_default_perms(fsp, pace, S_IROTH);
1210 pace->perms = unix_perms_to_acl_perms(pst->st_mode, S_IROTH, S_IWOTH, S_IXOTH);
1212 DLIST_ADD(*pp_ace, pace);
1218 /****************************************************************************
1219 Check if a POSIX ACL has the required SMB_ACL_USER_OBJ and SMB_ACL_GROUP_OBJ entries.
1220 If it does not have them, check if there are any entries where the trustee is the
1221 file owner or the owning group, and map these to SMB_ACL_USER_OBJ and SMB_ACL_GROUP_OBJ.
1222 ****************************************************************************/
1224 static void check_owning_objs(canon_ace *ace, DOM_SID *pfile_owner_sid, DOM_SID *pfile_grp_sid)
1226 bool got_user_obj, got_group_obj;
1227 canon_ace *current_ace;
1230 entries = count_canon_ace_list(ace);
1231 got_user_obj = False;
1232 got_group_obj = False;
1234 for (i=0, current_ace = ace; i < entries; i++, current_ace = current_ace->next) {
1235 if (current_ace->type == SMB_ACL_USER_OBJ)
1236 got_user_obj = True;
1237 else if (current_ace->type == SMB_ACL_GROUP_OBJ)
1238 got_group_obj = True;
1240 if (got_user_obj && got_group_obj) {
1241 DEBUG(10,("check_owning_objs: ACL had owning user/group entries.\n"));
1245 for (i=0, current_ace = ace; i < entries; i++, current_ace = current_ace->next) {
1246 if (!got_user_obj && current_ace->owner_type == UID_ACE &&
1247 sid_equal(¤t_ace->trustee, pfile_owner_sid)) {
1248 current_ace->type = SMB_ACL_USER_OBJ;
1249 got_user_obj = True;
1251 if (!got_group_obj && current_ace->owner_type == GID_ACE &&
1252 sid_equal(¤t_ace->trustee, pfile_grp_sid)) {
1253 current_ace->type = SMB_ACL_GROUP_OBJ;
1254 got_group_obj = True;
1258 DEBUG(10,("check_owning_objs: ACL is missing an owner entry.\n"));
1260 DEBUG(10,("check_owning_objs: ACL is missing an owning group entry.\n"));
1263 /****************************************************************************
1264 Unpack a SEC_DESC into two canonical ace lists.
1265 ****************************************************************************/
1267 static bool create_canon_ace_lists(files_struct *fsp, SMB_STRUCT_STAT *pst,
1268 DOM_SID *pfile_owner_sid,
1269 DOM_SID *pfile_grp_sid,
1270 canon_ace **ppfile_ace, canon_ace **ppdir_ace,
1273 bool all_aces_are_inherit_only = (fsp->is_directory ? True : False);
1274 canon_ace *file_ace = NULL;
1275 canon_ace *dir_ace = NULL;
1276 canon_ace *current_ace = NULL;
1277 bool got_dir_allow = False;
1278 bool got_file_allow = False;
1285 * Convert the incoming ACL into a more regular form.
1288 for(i = 0; i < dacl->num_aces; i++) {
1289 SEC_ACE *psa = &dacl->aces[i];
1291 if((psa->type != SEC_ACE_TYPE_ACCESS_ALLOWED) && (psa->type != SEC_ACE_TYPE_ACCESS_DENIED)) {
1292 DEBUG(3,("create_canon_ace_lists: unable to set anything but an ALLOW or DENY ACE.\n"));
1296 if (nt4_compatible_acls()) {
1298 * The security mask may be UNIX_ACCESS_NONE which should map into
1299 * no permissions (we overload the WRITE_OWNER bit for this) or it
1300 * should be one of the ALL/EXECUTE/READ/WRITE bits. Arrange for this
1301 * to be so. Any other bits override the UNIX_ACCESS_NONE bit.
1305 * Convert GENERIC bits to specific bits.
1308 se_map_generic(&psa->access_mask, &file_generic_mapping);
1310 psa->access_mask &= (UNIX_ACCESS_NONE|FILE_ALL_ACCESS);
1312 if(psa->access_mask != UNIX_ACCESS_NONE)
1313 psa->access_mask &= ~UNIX_ACCESS_NONE;
1318 * Deal with the fact that NT 4.x re-writes the canonical format
1319 * that we return for default ACLs. If a directory ACE is identical
1320 * to a inherited directory ACE then NT changes the bits so that the
1321 * first ACE is set to OI|IO and the second ACE for this SID is set
1322 * to CI. We need to repair this. JRA.
1325 for(i = 0; i < dacl->num_aces; i++) {
1326 SEC_ACE *psa1 = &dacl->aces[i];
1328 for (j = i + 1; j < dacl->num_aces; j++) {
1329 SEC_ACE *psa2 = &dacl->aces[j];
1331 if (psa1->access_mask != psa2->access_mask)
1334 if (!sid_equal(&psa1->trustee, &psa2->trustee))
1338 * Ok - permission bits and SIDs are equal.
1339 * Check if flags were re-written.
1342 if (psa1->flags & SEC_ACE_FLAG_INHERIT_ONLY) {
1344 psa1->flags |= (psa2->flags & (SEC_ACE_FLAG_CONTAINER_INHERIT|SEC_ACE_FLAG_OBJECT_INHERIT));
1345 psa2->flags &= ~(SEC_ACE_FLAG_CONTAINER_INHERIT|SEC_ACE_FLAG_OBJECT_INHERIT);
1347 } else if (psa2->flags & SEC_ACE_FLAG_INHERIT_ONLY) {
1349 psa2->flags |= (psa1->flags & (SEC_ACE_FLAG_CONTAINER_INHERIT|SEC_ACE_FLAG_OBJECT_INHERIT));
1350 psa1->flags &= ~(SEC_ACE_FLAG_CONTAINER_INHERIT|SEC_ACE_FLAG_OBJECT_INHERIT);
1356 for(i = 0; i < dacl->num_aces; i++) {
1357 SEC_ACE *psa = &dacl->aces[i];
1360 * Create a cannon_ace entry representing this NT DACL ACE.
1363 if ((current_ace = SMB_MALLOC_P(canon_ace)) == NULL) {
1364 free_canon_ace_list(file_ace);
1365 free_canon_ace_list(dir_ace);
1366 DEBUG(0,("create_canon_ace_lists: malloc fail.\n"));
1370 ZERO_STRUCTP(current_ace);
1372 sid_copy(¤t_ace->trustee, &psa->trustee);
1375 * Try and work out if the SID is a user or group
1376 * as we need to flag these differently for POSIX.
1377 * Note what kind of a POSIX ACL this should map to.
1380 if( sid_equal(¤t_ace->trustee, &global_sid_World)) {
1381 current_ace->owner_type = WORLD_ACE;
1382 current_ace->unix_ug.world = -1;
1383 current_ace->type = SMB_ACL_OTHER;
1384 } else if (sid_equal(¤t_ace->trustee, &global_sid_Creator_Owner)) {
1385 current_ace->owner_type = UID_ACE;
1386 current_ace->unix_ug.uid = pst->st_uid;
1387 current_ace->type = SMB_ACL_USER_OBJ;
1390 * The Creator Owner entry only specifies inheritable permissions,
1391 * never access permissions. WinNT doesn't always set the ACE to
1392 *INHERIT_ONLY, though.
1395 if (nt4_compatible_acls())
1396 psa->flags |= SEC_ACE_FLAG_INHERIT_ONLY;
1397 } else if (sid_equal(¤t_ace->trustee, &global_sid_Creator_Group)) {
1398 current_ace->owner_type = GID_ACE;
1399 current_ace->unix_ug.gid = pst->st_gid;
1400 current_ace->type = SMB_ACL_GROUP_OBJ;
1403 * The Creator Group entry only specifies inheritable permissions,
1404 * never access permissions. WinNT doesn't always set the ACE to
1405 *INHERIT_ONLY, though.
1407 if (nt4_compatible_acls())
1408 psa->flags |= SEC_ACE_FLAG_INHERIT_ONLY;
1410 } else if (sid_to_uid( ¤t_ace->trustee, ¤t_ace->unix_ug.uid)) {
1411 current_ace->owner_type = UID_ACE;
1412 current_ace->type = SMB_ACL_USER;
1413 } else if (sid_to_gid( ¤t_ace->trustee, ¤t_ace->unix_ug.gid)) {
1414 current_ace->owner_type = GID_ACE;
1415 current_ace->type = SMB_ACL_GROUP;
1420 * Silently ignore map failures in non-mappable SIDs (NT Authority, BUILTIN etc).
1423 if (non_mappable_sid(&psa->trustee)) {
1424 DEBUG(10,("create_canon_ace_lists: ignoring non-mappable SID %s\n",
1425 sid_to_string(str, &psa->trustee) ));
1426 SAFE_FREE(current_ace);
1430 free_canon_ace_list(file_ace);
1431 free_canon_ace_list(dir_ace);
1432 DEBUG(0,("create_canon_ace_lists: unable to map SID %s to uid or gid.\n",
1433 sid_to_string(str, ¤t_ace->trustee) ));
1434 SAFE_FREE(current_ace);
1439 * Map the given NT permissions into a UNIX mode_t containing only
1440 * S_I(R|W|X)USR bits.
1443 current_ace->perms |= map_nt_perms( &psa->access_mask, S_IRUSR);
1444 current_ace->attr = (psa->type == SEC_ACE_TYPE_ACCESS_ALLOWED) ? ALLOW_ACE : DENY_ACE;
1445 current_ace->inherited = ((psa->flags & SEC_ACE_FLAG_INHERITED_ACE) ? True : False);
1448 * Now add the created ace to either the file list, the directory
1449 * list, or both. We *MUST* preserve the order here (hence we use
1450 * DLIST_ADD_END) as NT ACLs are order dependent.
1453 if (fsp->is_directory) {
1456 * We can only add to the default POSIX ACE list if the ACE is
1457 * designed to be inherited by both files and directories.
1460 if ((psa->flags & (SEC_ACE_FLAG_OBJECT_INHERIT|SEC_ACE_FLAG_CONTAINER_INHERIT)) ==
1461 (SEC_ACE_FLAG_OBJECT_INHERIT|SEC_ACE_FLAG_CONTAINER_INHERIT)) {
1463 DLIST_ADD_END(dir_ace, current_ace, canon_ace *);
1466 * Note if this was an allow ace. We can't process
1467 * any further deny ace's after this.
1470 if (current_ace->attr == ALLOW_ACE)
1471 got_dir_allow = True;
1473 if ((current_ace->attr == DENY_ACE) && got_dir_allow) {
1474 DEBUG(0,("create_canon_ace_lists: malformed ACL in inheritable ACL ! \
1475 Deny entry after Allow entry. Failing to set on file %s.\n", fsp->fsp_name ));
1476 free_canon_ace_list(file_ace);
1477 free_canon_ace_list(dir_ace);
1481 if( DEBUGLVL( 10 )) {
1482 dbgtext("create_canon_ace_lists: adding dir ACL:\n");
1483 print_canon_ace( current_ace, 0);
1487 * If this is not an inherit only ACE we need to add a duplicate
1491 if (!(psa->flags & SEC_ACE_FLAG_INHERIT_ONLY)) {
1492 canon_ace *dup_ace = dup_canon_ace(current_ace);
1495 DEBUG(0,("create_canon_ace_lists: malloc fail !\n"));
1496 free_canon_ace_list(file_ace);
1497 free_canon_ace_list(dir_ace);
1502 * We must not free current_ace here as its
1503 * pointer is now owned by the dir_ace list.
1505 current_ace = dup_ace;
1508 * We must not free current_ace here as its
1509 * pointer is now owned by the dir_ace list.
1517 * Only add to the file ACL if not inherit only.
1520 if (current_ace && !(psa->flags & SEC_ACE_FLAG_INHERIT_ONLY)) {
1521 DLIST_ADD_END(file_ace, current_ace, canon_ace *);
1524 * Note if this was an allow ace. We can't process
1525 * any further deny ace's after this.
1528 if (current_ace->attr == ALLOW_ACE)
1529 got_file_allow = True;
1531 if ((current_ace->attr == DENY_ACE) && got_file_allow) {
1532 DEBUG(0,("create_canon_ace_lists: malformed ACL in file ACL ! \
1533 Deny entry after Allow entry. Failing to set on file %s.\n", fsp->fsp_name ));
1534 free_canon_ace_list(file_ace);
1535 free_canon_ace_list(dir_ace);
1539 if( DEBUGLVL( 10 )) {
1540 dbgtext("create_canon_ace_lists: adding file ACL:\n");
1541 print_canon_ace( current_ace, 0);
1543 all_aces_are_inherit_only = False;
1545 * We must not free current_ace here as its
1546 * pointer is now owned by the file_ace list.
1552 * Free if ACE was not added.
1555 SAFE_FREE(current_ace);
1558 if (fsp->is_directory && all_aces_are_inherit_only) {
1560 * Windows 2000 is doing one of these weird 'inherit acl'
1561 * traverses to conserve NTFS ACL resources. Just pretend
1562 * there was no DACL sent. JRA.
1565 DEBUG(10,("create_canon_ace_lists: Win2k inherit acl traverse. Ignoring DACL.\n"));
1566 free_canon_ace_list(file_ace);
1567 free_canon_ace_list(dir_ace);
1572 * Check if we have SMB_ACL_USER_OBJ and SMB_ACL_GROUP_OBJ entries in each
1573 * ACL. If we don't have them, check if any SMB_ACL_USER/SMB_ACL_GROUP
1574 * entries can be converted to *_OBJ. Usually we will already have these
1575 * entries in the Default ACL, and the Access ACL will not have them.
1578 check_owning_objs(file_ace, pfile_owner_sid, pfile_grp_sid);
1581 check_owning_objs(dir_ace, pfile_owner_sid, pfile_grp_sid);
1585 *ppfile_ace = file_ace;
1586 *ppdir_ace = dir_ace;
1591 /****************************************************************************
1592 ASCII art time again... JRA :-).
1594 We have 4 cases to process when moving from an NT ACL to a POSIX ACL. Firstly,
1595 we insist the ACL is in canonical form (ie. all DENY entries preceede ALLOW
1596 entries). Secondly, the merge code has ensured that all duplicate SID entries for
1597 allow or deny have been merged, so the same SID can only appear once in the deny
1598 list or once in the allow list.
1600 We then process as follows :
1602 ---------------------------------------------------------------------------
1603 First pass - look for a Everyone DENY entry.
1605 If it is deny all (rwx) trunate the list at this point.
1606 Else, walk the list from this point and use the deny permissions of this
1607 entry as a mask on all following allow entries. Finally, delete
1608 the Everyone DENY entry (we have applied it to everything possible).
1610 In addition, in this pass we remove any DENY entries that have
1611 no permissions (ie. they are a DENY nothing).
1612 ---------------------------------------------------------------------------
1613 Second pass - only deal with deny user entries.
1615 DENY user1 (perms XXX)
1618 for all following allow group entries where user1 is in group
1619 new_perms |= group_perms;
1621 user1 entry perms = new_perms & ~ XXX;
1623 Convert the deny entry to an allow entry with the new perms and
1624 push to the end of the list. Note if the user was in no groups
1625 this maps to a specific allow nothing entry for this user.
1627 The common case from the NT ACL choser (userX deny all) is
1628 optimised so we don't do the group lookup - we just map to
1629 an allow nothing entry.
1631 What we're doing here is inferring the allow permissions the
1632 person setting the ACE on user1 wanted by looking at the allow
1633 permissions on the groups the user is currently in. This will
1634 be a snapshot, depending on group membership but is the best
1635 we can do and has the advantage of failing closed rather than
1637 ---------------------------------------------------------------------------
1638 Third pass - only deal with deny group entries.
1640 DENY group1 (perms XXX)
1642 for all following allow user entries where user is in group1
1643 user entry perms = user entry perms & ~ XXX;
1645 If there is a group Everyone allow entry with permissions YYY,
1646 convert the group1 entry to an allow entry and modify its
1649 new_perms = YYY & ~ XXX
1651 and push to the end of the list.
1653 If there is no group Everyone allow entry then convert the
1654 group1 entry to a allow nothing entry and push to the end of the list.
1656 Note that the common case from the NT ACL choser (groupX deny all)
1657 cannot be optimised here as we need to modify user entries who are
1658 in the group to change them to a deny all also.
1660 What we're doing here is modifying the allow permissions of
1661 user entries (which are more specific in POSIX ACLs) to mask
1662 out the explicit deny set on the group they are in. This will
1663 be a snapshot depending on current group membership but is the
1664 best we can do and has the advantage of failing closed rather
1666 ---------------------------------------------------------------------------
1667 Fourth pass - cope with cumulative permissions.
1669 for all allow user entries, if there exists an allow group entry with
1670 more permissive permissions, and the user is in that group, rewrite the
1671 allow user permissions to contain both sets of permissions.
1673 Currently the code for this is #ifdef'ed out as these semantics make
1674 no sense to me. JRA.
1675 ---------------------------------------------------------------------------
1677 Note we *MUST* do the deny user pass first as this will convert deny user
1678 entries into allow user entries which can then be processed by the deny
1681 The above algorithm took a *lot* of thinking about - hence this
1682 explaination :-). JRA.
1683 ****************************************************************************/
1685 /****************************************************************************
1686 Process a canon_ace list entries. This is very complex code. We need
1687 to go through and remove the "deny" permissions from any allow entry that matches
1688 the id of this entry. We have already refused any NT ACL that wasn't in correct
1689 order (DENY followed by ALLOW). If any allow entry ends up with zero permissions,
1690 we just remove it (to fail safe). We have already removed any duplicate ace
1691 entries. Treat an "Everyone" DENY_ACE as a special case - use it to mask all
1693 ****************************************************************************/
1695 static void process_deny_list( canon_ace **pp_ace_list )
1697 canon_ace *ace_list = *pp_ace_list;
1698 canon_ace *curr_ace = NULL;
1699 canon_ace *curr_ace_next = NULL;
1701 /* Pass 1 above - look for an Everyone, deny entry. */
1703 for (curr_ace = ace_list; curr_ace; curr_ace = curr_ace_next) {
1704 canon_ace *allow_ace_p;
1706 curr_ace_next = curr_ace->next; /* So we can't lose the link. */
1708 if (curr_ace->attr != DENY_ACE)
1711 if (curr_ace->perms == (mode_t)0) {
1713 /* Deny nothing entry - delete. */
1715 DLIST_REMOVE(ace_list, curr_ace);
1719 if (!sid_equal(&curr_ace->trustee, &global_sid_World))
1722 /* JRATEST - assert. */
1723 SMB_ASSERT(curr_ace->owner_type == WORLD_ACE);
1725 if (curr_ace->perms == ALL_ACE_PERMS) {
1728 * Optimisation. This is a DENY_ALL to Everyone. Truncate the
1729 * list at this point including this entry.
1732 canon_ace *prev_entry = curr_ace->prev;
1734 free_canon_ace_list( curr_ace );
1736 prev_entry->next = NULL;
1738 /* We deleted the entire list. */
1744 for (allow_ace_p = curr_ace->next; allow_ace_p; allow_ace_p = allow_ace_p->next) {
1747 * Only mask off allow entries.
1750 if (allow_ace_p->attr != ALLOW_ACE)
1753 allow_ace_p->perms &= ~curr_ace->perms;
1757 * Now it's been applied, remove it.
1760 DLIST_REMOVE(ace_list, curr_ace);
1763 /* Pass 2 above - deal with deny user entries. */
1765 for (curr_ace = ace_list; curr_ace; curr_ace = curr_ace_next) {
1766 mode_t new_perms = (mode_t)0;
1767 canon_ace *allow_ace_p;
1769 curr_ace_next = curr_ace->next; /* So we can't lose the link. */
1771 if (curr_ace->attr != DENY_ACE)
1774 if (curr_ace->owner_type != UID_ACE)
1777 if (curr_ace->perms == ALL_ACE_PERMS) {
1780 * Optimisation - this is a deny everything to this user.
1781 * Convert to an allow nothing and push to the end of the list.
1784 curr_ace->attr = ALLOW_ACE;
1785 curr_ace->perms = (mode_t)0;
1786 DLIST_DEMOTE(ace_list, curr_ace, canon_ace *);
1790 for (allow_ace_p = curr_ace->next; allow_ace_p; allow_ace_p = allow_ace_p->next) {
1792 if (allow_ace_p->attr != ALLOW_ACE)
1795 /* We process GID_ACE and WORLD_ACE entries only. */
1797 if (allow_ace_p->owner_type == UID_ACE)
1800 if (uid_entry_in_group( curr_ace, allow_ace_p))
1801 new_perms |= allow_ace_p->perms;
1805 * Convert to a allow entry, modify the perms and push to the end
1809 curr_ace->attr = ALLOW_ACE;
1810 curr_ace->perms = (new_perms & ~curr_ace->perms);
1811 DLIST_DEMOTE(ace_list, curr_ace, canon_ace *);
1814 /* Pass 3 above - deal with deny group entries. */
1816 for (curr_ace = ace_list; curr_ace; curr_ace = curr_ace_next) {
1817 canon_ace *allow_ace_p;
1818 canon_ace *allow_everyone_p = NULL;
1820 curr_ace_next = curr_ace->next; /* So we can't lose the link. */
1822 if (curr_ace->attr != DENY_ACE)
1825 if (curr_ace->owner_type != GID_ACE)
1828 for (allow_ace_p = curr_ace->next; allow_ace_p; allow_ace_p = allow_ace_p->next) {
1830 if (allow_ace_p->attr != ALLOW_ACE)
1833 /* Store a pointer to the Everyone allow, if it exists. */
1834 if (allow_ace_p->owner_type == WORLD_ACE)
1835 allow_everyone_p = allow_ace_p;
1837 /* We process UID_ACE entries only. */
1839 if (allow_ace_p->owner_type != UID_ACE)
1842 /* Mask off the deny group perms. */
1844 if (uid_entry_in_group( allow_ace_p, curr_ace))
1845 allow_ace_p->perms &= ~curr_ace->perms;
1849 * Convert the deny to an allow with the correct perms and
1850 * push to the end of the list.
1853 curr_ace->attr = ALLOW_ACE;
1854 if (allow_everyone_p)
1855 curr_ace->perms = allow_everyone_p->perms & ~curr_ace->perms;
1857 curr_ace->perms = (mode_t)0;
1858 DLIST_DEMOTE(ace_list, curr_ace, canon_ace *);
1861 /* Doing this fourth pass allows Windows semantics to be layered
1862 * on top of POSIX semantics. I'm not sure if this is desirable.
1863 * For example, in W2K ACLs there is no way to say, "Group X no
1864 * access, user Y full access" if user Y is a member of group X.
1865 * This seems completely broken semantics to me.... JRA.
1869 /* Pass 4 above - deal with allow entries. */
1871 for (curr_ace = ace_list; curr_ace; curr_ace = curr_ace_next) {
1872 canon_ace *allow_ace_p;
1874 curr_ace_next = curr_ace->next; /* So we can't lose the link. */
1876 if (curr_ace->attr != ALLOW_ACE)
1879 if (curr_ace->owner_type != UID_ACE)
1882 for (allow_ace_p = ace_list; allow_ace_p; allow_ace_p = allow_ace_p->next) {
1884 if (allow_ace_p->attr != ALLOW_ACE)
1887 /* We process GID_ACE entries only. */
1889 if (allow_ace_p->owner_type != GID_ACE)
1892 /* OR in the group perms. */
1894 if (uid_entry_in_group( curr_ace, allow_ace_p))
1895 curr_ace->perms |= allow_ace_p->perms;
1900 *pp_ace_list = ace_list;
1903 /****************************************************************************
1904 Create a default mode that will be used if a security descriptor entry has
1905 no user/group/world entries.
1906 ****************************************************************************/
1908 static mode_t create_default_mode(files_struct *fsp, bool interitable_mode)
1910 int snum = SNUM(fsp->conn);
1911 mode_t and_bits = (mode_t)0;
1912 mode_t or_bits = (mode_t)0;
1913 mode_t mode = interitable_mode
1914 ? unix_mode( fsp->conn, FILE_ATTRIBUTE_ARCHIVE, fsp->fsp_name,
1918 if (fsp->is_directory)
1919 mode |= (S_IWUSR|S_IXUSR);
1922 * Now AND with the create mode/directory mode bits then OR with the
1923 * force create mode/force directory mode bits.
1926 if (fsp->is_directory) {
1927 and_bits = lp_dir_security_mask(snum);
1928 or_bits = lp_force_dir_security_mode(snum);
1930 and_bits = lp_security_mask(snum);
1931 or_bits = lp_force_security_mode(snum);
1934 return ((mode & and_bits)|or_bits);
1937 /****************************************************************************
1938 Unpack a SEC_DESC into two canonical ace lists. We don't depend on this
1940 ****************************************************************************/
1942 static bool unpack_canon_ace(files_struct *fsp,
1943 SMB_STRUCT_STAT *pst,
1944 DOM_SID *pfile_owner_sid,
1945 DOM_SID *pfile_grp_sid,
1946 canon_ace **ppfile_ace, canon_ace **ppdir_ace,
1947 uint32 security_info_sent, SEC_DESC *psd)
1949 canon_ace *file_ace = NULL;
1950 canon_ace *dir_ace = NULL;
1955 if(security_info_sent == 0) {
1956 DEBUG(0,("unpack_canon_ace: no security info sent !\n"));
1961 * If no DACL then this is a chown only security descriptor.
1964 if(!(security_info_sent & DACL_SECURITY_INFORMATION) || !psd->dacl)
1968 * Now go through the DACL and create the canon_ace lists.
1971 if (!create_canon_ace_lists( fsp, pst, pfile_owner_sid, pfile_grp_sid,
1972 &file_ace, &dir_ace, psd->dacl))
1975 if ((file_ace == NULL) && (dir_ace == NULL)) {
1976 /* W2K traverse DACL set - ignore. */
1981 * Go through the canon_ace list and merge entries
1982 * belonging to identical users of identical allow or deny type.
1983 * We can do this as all deny entries come first, followed by
1984 * all allow entries (we have mandated this before accepting this acl).
1987 print_canon_ace_list( "file ace - before merge", file_ace);
1988 merge_aces( &file_ace );
1990 print_canon_ace_list( "dir ace - before merge", dir_ace);
1991 merge_aces( &dir_ace );
1994 * NT ACLs are order dependent. Go through the acl lists and
1995 * process DENY entries by masking the allow entries.
1998 print_canon_ace_list( "file ace - before deny", file_ace);
1999 process_deny_list( &file_ace);
2001 print_canon_ace_list( "dir ace - before deny", dir_ace);
2002 process_deny_list( &dir_ace);
2005 * A well formed POSIX file or default ACL has at least 3 entries, a
2006 * SMB_ACL_USER_OBJ, SMB_ACL_GROUP_OBJ, SMB_ACL_OTHER_OBJ
2007 * and optionally a mask entry. Ensure this is the case.
2010 print_canon_ace_list( "file ace - before valid", file_ace);
2013 * A default 3 element mode entry for a file should be r-- --- ---.
2014 * A default 3 element mode entry for a directory should be rwx --- ---.
2017 pst->st_mode = create_default_mode(fsp, False);
2019 if (!ensure_canon_entry_valid(&file_ace, fsp, pfile_owner_sid, pfile_grp_sid, pst, True)) {
2020 free_canon_ace_list(file_ace);
2021 free_canon_ace_list(dir_ace);
2025 print_canon_ace_list( "dir ace - before valid", dir_ace);
2028 * A default inheritable 3 element mode entry for a directory should be the
2029 * mode Samba will use to create a file within. Ensure user rwx bits are set if
2033 pst->st_mode = create_default_mode(fsp, True);
2035 if (dir_ace && !ensure_canon_entry_valid(&dir_ace, fsp, pfile_owner_sid, pfile_grp_sid, pst, True)) {
2036 free_canon_ace_list(file_ace);
2037 free_canon_ace_list(dir_ace);
2041 print_canon_ace_list( "file ace - return", file_ace);
2042 print_canon_ace_list( "dir ace - return", dir_ace);
2044 *ppfile_ace = file_ace;
2045 *ppdir_ace = dir_ace;
2050 /******************************************************************************
2051 When returning permissions, try and fit NT display
2052 semantics if possible. Note the the canon_entries here must have been malloced.
2053 The list format should be - first entry = owner, followed by group and other user
2054 entries, last entry = other.
2056 Note that this doesn't exactly match the NT semantics for an ACL. As POSIX entries
2057 are not ordered, and match on the most specific entry rather than walking a list,
2058 then a simple POSIX permission of rw-r--r-- should really map to 5 entries,
2060 Entry 0: owner : deny all except read and write.
2061 Entry 1: owner : allow read and write.
2062 Entry 2: group : deny all except read.
2063 Entry 3: group : allow read.
2064 Entry 4: Everyone : allow read.
2066 But NT cannot display this in their ACL editor !
2067 ********************************************************************************/
2069 static void arrange_posix_perms(const char *filename, canon_ace **pp_list_head)
2071 canon_ace *list_head = *pp_list_head;
2072 canon_ace *owner_ace = NULL;
2073 canon_ace *other_ace = NULL;
2074 canon_ace *ace = NULL;
2076 for (ace = list_head; ace; ace = ace->next) {
2077 if (ace->type == SMB_ACL_USER_OBJ)
2079 else if (ace->type == SMB_ACL_OTHER) {
2080 /* Last ace - this is "other" */
2085 if (!owner_ace || !other_ace) {
2086 DEBUG(0,("arrange_posix_perms: Invalid POSIX permissions for file %s, missing owner or other.\n",
2092 * The POSIX algorithm applies to owner first, and other last,
2093 * so ensure they are arranged in this order.
2097 DLIST_PROMOTE(list_head, owner_ace);
2101 DLIST_DEMOTE(list_head, other_ace, canon_ace *);
2104 /* We have probably changed the head of the list. */
2106 *pp_list_head = list_head;
2109 /****************************************************************************
2110 Create a linked list of canonical ACE entries.
2111 ****************************************************************************/
2113 static canon_ace *canonicalise_acl( const files_struct *fsp, SMB_ACL_T posix_acl, SMB_STRUCT_STAT *psbuf,
2114 const DOM_SID *powner, const DOM_SID *pgroup, struct pai_val *pal, SMB_ACL_TYPE_T the_acl_type)
2116 connection_struct *conn = fsp->conn;
2117 mode_t acl_mask = (S_IRUSR|S_IWUSR|S_IXUSR);
2118 canon_ace *list_head = NULL;
2119 canon_ace *ace = NULL;
2120 canon_ace *next_ace = NULL;
2121 int entry_id = SMB_ACL_FIRST_ENTRY;
2122 SMB_ACL_ENTRY_T entry;
2125 while ( posix_acl && (SMB_VFS_SYS_ACL_GET_ENTRY(conn, posix_acl, entry_id, &entry) == 1)) {
2126 SMB_ACL_TAG_T tagtype;
2127 SMB_ACL_PERMSET_T permset;
2130 enum ace_owner owner_type;
2133 if (entry_id == SMB_ACL_FIRST_ENTRY)
2134 entry_id = SMB_ACL_NEXT_ENTRY;
2136 /* Is this a MASK entry ? */
2137 if (SMB_VFS_SYS_ACL_GET_TAG_TYPE(conn, entry, &tagtype) == -1)
2140 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, entry, &permset) == -1)
2143 /* Decide which SID to use based on the ACL type. */
2145 case SMB_ACL_USER_OBJ:
2146 /* Get the SID from the owner. */
2147 sid_copy(&sid, powner);
2148 unix_ug.uid = psbuf->st_uid;
2149 owner_type = UID_ACE;
2153 uid_t *puid = (uid_t *)SMB_VFS_SYS_ACL_GET_QUALIFIER(conn, entry);
2155 DEBUG(0,("canonicalise_acl: Failed to get uid.\n"));
2159 * A SMB_ACL_USER entry for the owner is shadowed by the
2160 * SMB_ACL_USER_OBJ entry and Windows also cannot represent
2161 * that entry, so we ignore it. We also don't create such
2162 * entries out of the blue when setting ACLs, so a get/set
2163 * cycle will drop them.
2165 if (the_acl_type == SMB_ACL_TYPE_ACCESS && *puid == psbuf->st_uid) {
2166 SMB_VFS_SYS_ACL_FREE_QUALIFIER(conn, (void *)puid,tagtype);
2169 uid_to_sid( &sid, *puid);
2170 unix_ug.uid = *puid;
2171 owner_type = UID_ACE;
2172 SMB_VFS_SYS_ACL_FREE_QUALIFIER(conn, (void *)puid,tagtype);
2175 case SMB_ACL_GROUP_OBJ:
2176 /* Get the SID from the owning group. */
2177 sid_copy(&sid, pgroup);
2178 unix_ug.gid = psbuf->st_gid;
2179 owner_type = GID_ACE;
2183 gid_t *pgid = (gid_t *)SMB_VFS_SYS_ACL_GET_QUALIFIER(conn, entry);
2185 DEBUG(0,("canonicalise_acl: Failed to get gid.\n"));
2188 gid_to_sid( &sid, *pgid);
2189 unix_ug.gid = *pgid;
2190 owner_type = GID_ACE;
2191 SMB_VFS_SYS_ACL_FREE_QUALIFIER(conn, (void *)pgid,tagtype);
2195 acl_mask = convert_permset_to_mode_t(conn, permset);
2196 continue; /* Don't count the mask as an entry. */
2198 /* Use the Everyone SID */
2199 sid = global_sid_World;
2201 owner_type = WORLD_ACE;
2204 DEBUG(0,("canonicalise_acl: Unknown tagtype %u\n", (unsigned int)tagtype));
2209 * Add this entry to the list.
2212 if ((ace = SMB_MALLOC_P(canon_ace)) == NULL)
2216 ace->type = tagtype;
2217 ace->perms = convert_permset_to_mode_t(conn, permset);
2218 ace->attr = ALLOW_ACE;
2220 ace->unix_ug = unix_ug;
2221 ace->owner_type = owner_type;
2222 ace->inherited = get_inherited_flag(pal, ace, (the_acl_type == SMB_ACL_TYPE_DEFAULT));
2224 DLIST_ADD(list_head, ace);
2228 * This next call will ensure we have at least a user/group/world set.
2231 if (!ensure_canon_entry_valid(&list_head, fsp, powner, pgroup, psbuf, False))
2235 * Now go through the list, masking the permissions with the
2236 * acl_mask. Ensure all DENY Entries are at the start of the list.
2239 DEBUG(10,("canonicalise_acl: %s ace entries before arrange :\n", the_acl_type == SMB_ACL_TYPE_ACCESS ? "Access" : "Default" ));
2241 for ( ace_count = 0, ace = list_head; ace; ace = next_ace, ace_count++) {
2242 next_ace = ace->next;
2244 /* Masks are only applied to entries other than USER_OBJ and OTHER. */
2245 if (ace->type != SMB_ACL_OTHER && ace->type != SMB_ACL_USER_OBJ)
2246 ace->perms &= acl_mask;
2248 if (ace->perms == 0) {
2249 DLIST_PROMOTE(list_head, ace);
2252 if( DEBUGLVL( 10 ) ) {
2253 print_canon_ace(ace, ace_count);
2257 arrange_posix_perms(fsp->fsp_name,&list_head );
2259 print_canon_ace_list( "canonicalise_acl: ace entries after arrange", list_head );
2265 free_canon_ace_list(list_head);
2269 /****************************************************************************
2270 Check if the current user group list contains a given group.
2271 ****************************************************************************/
2273 static bool current_user_in_group(gid_t gid)
2277 for (i = 0; i < current_user.ut.ngroups; i++) {
2278 if (current_user.ut.groups[i] == gid) {
2286 /****************************************************************************
2287 Should we override a deny ? Check deprecated 'acl group control'
2289 ****************************************************************************/
2291 static bool acl_group_override(connection_struct *conn, gid_t prim_gid)
2293 if ( (errno == EACCES || errno == EPERM)
2294 && (lp_acl_group_control(SNUM(conn)) || lp_dos_filemode(SNUM(conn)))
2295 && current_user_in_group(prim_gid))
2303 /****************************************************************************
2304 Attempt to apply an ACL to a file or directory.
2305 ****************************************************************************/
2307 static bool set_canon_ace_list(files_struct *fsp, canon_ace *the_ace, bool default_ace, gid_t prim_gid, bool *pacl_set_support)
2309 connection_struct *conn = fsp->conn;
2311 SMB_ACL_T the_acl = SMB_VFS_SYS_ACL_INIT(conn, (int)count_canon_ace_list(the_ace) + 1);
2314 SMB_ACL_ENTRY_T mask_entry;
2315 bool got_mask_entry = False;
2316 SMB_ACL_PERMSET_T mask_permset;
2317 SMB_ACL_TYPE_T the_acl_type = (default_ace ? SMB_ACL_TYPE_DEFAULT : SMB_ACL_TYPE_ACCESS);
2318 bool needs_mask = False;
2319 mode_t mask_perms = 0;
2321 #if defined(POSIX_ACL_NEEDS_MASK)
2322 /* HP-UX always wants to have a mask (called "class" there). */
2326 if (the_acl == NULL) {
2328 if (!no_acl_syscall_error(errno)) {
2330 * Only print this error message if we have some kind of ACL
2331 * support that's not working. Otherwise we would always get this.
2333 DEBUG(0,("set_canon_ace_list: Unable to init %s ACL. (%s)\n",
2334 default_ace ? "default" : "file", strerror(errno) ));
2336 *pacl_set_support = False;
2340 if( DEBUGLVL( 10 )) {
2341 dbgtext("set_canon_ace_list: setting ACL:\n");
2342 for (i = 0, p_ace = the_ace; p_ace; p_ace = p_ace->next, i++ ) {
2343 print_canon_ace( p_ace, i);
2347 for (i = 0, p_ace = the_ace; p_ace; p_ace = p_ace->next, i++ ) {
2348 SMB_ACL_ENTRY_T the_entry;
2349 SMB_ACL_PERMSET_T the_permset;
2352 * ACLs only "need" an ACL_MASK entry if there are any named user or
2353 * named group entries. But if there is an ACL_MASK entry, it applies
2354 * to ACL_USER, ACL_GROUP, and ACL_GROUP_OBJ entries. Set the mask
2355 * so that it doesn't deny (i.e., mask off) any permissions.
2358 if (p_ace->type == SMB_ACL_USER || p_ace->type == SMB_ACL_GROUP) {
2360 mask_perms |= p_ace->perms;
2361 } else if (p_ace->type == SMB_ACL_GROUP_OBJ) {
2362 mask_perms |= p_ace->perms;
2366 * Get the entry for this ACE.
2369 if (SMB_VFS_SYS_ACL_CREATE_ENTRY(conn, &the_acl, &the_entry) == -1) {
2370 DEBUG(0,("set_canon_ace_list: Failed to create entry %d. (%s)\n",
2371 i, strerror(errno) ));
2375 if (p_ace->type == SMB_ACL_MASK) {
2376 mask_entry = the_entry;
2377 got_mask_entry = True;
2381 * Ok - we now know the ACL calls should be working, don't
2382 * allow fallback to chmod.
2385 *pacl_set_support = True;
2388 * Initialise the entry from the canon_ace.
2392 * First tell the entry what type of ACE this is.
2395 if (SMB_VFS_SYS_ACL_SET_TAG_TYPE(conn, the_entry, p_ace->type) == -1) {
2396 DEBUG(0,("set_canon_ace_list: Failed to set tag type on entry %d. (%s)\n",
2397 i, strerror(errno) ));
2402 * Only set the qualifier (user or group id) if the entry is a user
2406 if ((p_ace->type == SMB_ACL_USER) || (p_ace->type == SMB_ACL_GROUP)) {
2407 if (SMB_VFS_SYS_ACL_SET_QUALIFIER(conn, the_entry,(void *)&p_ace->unix_ug.uid) == -1) {
2408 DEBUG(0,("set_canon_ace_list: Failed to set qualifier on entry %d. (%s)\n",
2409 i, strerror(errno) ));
2415 * Convert the mode_t perms in the canon_ace to a POSIX permset.
2418 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, the_entry, &the_permset) == -1) {
2419 DEBUG(0,("set_canon_ace_list: Failed to get permset on entry %d. (%s)\n",
2420 i, strerror(errno) ));
2424 if (map_acl_perms_to_permset(conn, p_ace->perms, &the_permset) == -1) {
2425 DEBUG(0,("set_canon_ace_list: Failed to create permset for mode (%u) on entry %d. (%s)\n",
2426 (unsigned int)p_ace->perms, i, strerror(errno) ));
2431 * ..and apply them to the entry.
2434 if (SMB_VFS_SYS_ACL_SET_PERMSET(conn, the_entry, the_permset) == -1) {
2435 DEBUG(0,("set_canon_ace_list: Failed to add permset on entry %d. (%s)\n",
2436 i, strerror(errno) ));
2441 print_canon_ace( p_ace, i);
2445 if (needs_mask && !got_mask_entry) {
2446 if (SMB_VFS_SYS_ACL_CREATE_ENTRY(conn, &the_acl, &mask_entry) == -1) {
2447 DEBUG(0,("set_canon_ace_list: Failed to create mask entry. (%s)\n", strerror(errno) ));
2451 if (SMB_VFS_SYS_ACL_SET_TAG_TYPE(conn, mask_entry, SMB_ACL_MASK) == -1) {
2452 DEBUG(0,("set_canon_ace_list: Failed to set tag type on mask entry. (%s)\n",strerror(errno) ));
2456 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, mask_entry, &mask_permset) == -1) {
2457 DEBUG(0,("set_canon_ace_list: Failed to get mask permset. (%s)\n", strerror(errno) ));
2461 if (map_acl_perms_to_permset(conn, S_IRUSR|S_IWUSR|S_IXUSR, &mask_permset) == -1) {
2462 DEBUG(0,("set_canon_ace_list: Failed to create mask permset. (%s)\n", strerror(errno) ));
2466 if (SMB_VFS_SYS_ACL_SET_PERMSET(conn, mask_entry, mask_permset) == -1) {
2467 DEBUG(0,("set_canon_ace_list: Failed to add mask permset. (%s)\n", strerror(errno) ));
2473 * Finally apply it to the file or directory.
2476 if(default_ace || fsp->is_directory || fsp->fh->fd == -1) {
2477 if (SMB_VFS_SYS_ACL_SET_FILE(conn, fsp->fsp_name, the_acl_type, the_acl) == -1) {
2479 * Some systems allow all the above calls and only fail with no ACL support
2480 * when attempting to apply the acl. HPUX with HFS is an example of this. JRA.
2482 if (no_acl_syscall_error(errno)) {
2483 *pacl_set_support = False;
2486 if (acl_group_override(conn, prim_gid)) {
2489 DEBUG(5,("set_canon_ace_list: acl group control on and current user in file %s primary group.\n",
2493 sret = SMB_VFS_SYS_ACL_SET_FILE(conn, fsp->fsp_name, the_acl_type, the_acl);
2501 DEBUG(2,("set_canon_ace_list: sys_acl_set_file type %s failed for file %s (%s).\n",
2502 the_acl_type == SMB_ACL_TYPE_DEFAULT ? "directory default" : "file",
2503 fsp->fsp_name, strerror(errno) ));
2508 if (SMB_VFS_SYS_ACL_SET_FD(fsp, fsp->fh->fd, the_acl) == -1) {
2510 * Some systems allow all the above calls and only fail with no ACL support
2511 * when attempting to apply the acl. HPUX with HFS is an example of this. JRA.
2513 if (no_acl_syscall_error(errno)) {
2514 *pacl_set_support = False;
2517 if (acl_group_override(conn, prim_gid)) {
2520 DEBUG(5,("set_canon_ace_list: acl group control on and current user in file %s primary group.\n",
2524 sret = SMB_VFS_SYS_ACL_SET_FD(fsp, fsp->fh->fd, the_acl);
2532 DEBUG(2,("set_canon_ace_list: sys_acl_set_file failed for file %s (%s).\n",
2533 fsp->fsp_name, strerror(errno) ));
2543 if (the_acl != NULL) {
2544 SMB_VFS_SYS_ACL_FREE_ACL(conn, the_acl);
2550 /****************************************************************************
2551 Find a particular canon_ace entry.
2552 ****************************************************************************/
2554 static struct canon_ace *canon_ace_entry_for(struct canon_ace *list, SMB_ACL_TAG_T type, posix_id *id)
2557 if (list->type == type && ((type != SMB_ACL_USER && type != SMB_ACL_GROUP) ||
2558 (type == SMB_ACL_USER && id && id->uid == list->unix_ug.uid) ||
2559 (type == SMB_ACL_GROUP && id && id->gid == list->unix_ug.gid)))
2566 /****************************************************************************
2568 ****************************************************************************/
2570 SMB_ACL_T free_empty_sys_acl(connection_struct *conn, SMB_ACL_T the_acl)
2572 SMB_ACL_ENTRY_T entry;
2576 if (SMB_VFS_SYS_ACL_GET_ENTRY(conn, the_acl, SMB_ACL_FIRST_ENTRY, &entry) != 1) {
2577 SMB_VFS_SYS_ACL_FREE_ACL(conn, the_acl);
2583 /****************************************************************************
2584 Convert a canon_ace to a generic 3 element permission - if possible.
2585 ****************************************************************************/
2587 #define MAP_PERM(p,mask,result) (((p) & (mask)) ? (result) : 0 )
2589 static bool convert_canon_ace_to_posix_perms( files_struct *fsp, canon_ace *file_ace_list, mode_t *posix_perms)
2591 int snum = SNUM(fsp->conn);
2592 size_t ace_count = count_canon_ace_list(file_ace_list);
2594 canon_ace *owner_ace = NULL;
2595 canon_ace *group_ace = NULL;
2596 canon_ace *other_ace = NULL;
2600 if (ace_count != 3) {
2601 DEBUG(3,("convert_canon_ace_to_posix_perms: Too many ACE entries for file %s to convert to \
2602 posix perms.\n", fsp->fsp_name ));
2606 for (ace_p = file_ace_list; ace_p; ace_p = ace_p->next) {
2607 if (ace_p->owner_type == UID_ACE)
2609 else if (ace_p->owner_type == GID_ACE)
2611 else if (ace_p->owner_type == WORLD_ACE)
2615 if (!owner_ace || !group_ace || !other_ace) {
2616 DEBUG(3,("convert_canon_ace_to_posix_perms: Can't get standard entries for file %s.\n",
2621 *posix_perms = (mode_t)0;
2623 *posix_perms |= owner_ace->perms;
2624 *posix_perms |= MAP_PERM(group_ace->perms, S_IRUSR, S_IRGRP);
2625 *posix_perms |= MAP_PERM(group_ace->perms, S_IWUSR, S_IWGRP);
2626 *posix_perms |= MAP_PERM(group_ace->perms, S_IXUSR, S_IXGRP);
2627 *posix_perms |= MAP_PERM(other_ace->perms, S_IRUSR, S_IROTH);
2628 *posix_perms |= MAP_PERM(other_ace->perms, S_IWUSR, S_IWOTH);
2629 *posix_perms |= MAP_PERM(other_ace->perms, S_IXUSR, S_IXOTH);
2631 /* The owner must have at least read access. */
2633 *posix_perms |= S_IRUSR;
2634 if (fsp->is_directory)
2635 *posix_perms |= (S_IWUSR|S_IXUSR);
2637 /* If requested apply the masks. */
2639 /* Get the initial bits to apply. */
2641 if (fsp->is_directory) {
2642 and_bits = lp_dir_security_mask(snum);
2643 or_bits = lp_force_dir_security_mode(snum);
2645 and_bits = lp_security_mask(snum);
2646 or_bits = lp_force_security_mode(snum);
2649 *posix_perms = (((*posix_perms) & and_bits)|or_bits);
2651 DEBUG(10,("convert_canon_ace_to_posix_perms: converted u=%o,g=%o,w=%o to perm=0%o for file %s.\n",
2652 (int)owner_ace->perms, (int)group_ace->perms, (int)other_ace->perms, (int)*posix_perms,
2658 /****************************************************************************
2659 Incoming NT ACLs on a directory can be split into a default POSIX acl (CI|OI|IO) and
2660 a normal POSIX acl. Win2k needs these split acls re-merging into one ACL
2661 with CI|OI set so it is inherited and also applies to the directory.
2662 Based on code from "Jim McDonough" <jmcd@us.ibm.com>.
2663 ****************************************************************************/
2665 static size_t merge_default_aces( SEC_ACE *nt_ace_list, size_t num_aces)
2669 for (i = 0; i < num_aces; i++) {
2670 for (j = i+1; j < num_aces; j++) {
2671 uint32 i_flags_ni = (nt_ace_list[i].flags & ~SEC_ACE_FLAG_INHERITED_ACE);
2672 uint32 j_flags_ni = (nt_ace_list[j].flags & ~SEC_ACE_FLAG_INHERITED_ACE);
2673 bool i_inh = (nt_ace_list[i].flags & SEC_ACE_FLAG_INHERITED_ACE) ? True : False;
2674 bool j_inh = (nt_ace_list[j].flags & SEC_ACE_FLAG_INHERITED_ACE) ? True : False;
2676 /* We know the lower number ACE's are file entries. */
2677 if ((nt_ace_list[i].type == nt_ace_list[j].type) &&
2678 (nt_ace_list[i].size == nt_ace_list[j].size) &&
2679 (nt_ace_list[i].access_mask == nt_ace_list[j].access_mask) &&
2680 sid_equal(&nt_ace_list[i].trustee, &nt_ace_list[j].trustee) &&
2682 (i_flags_ni == 0) &&
2683 (j_flags_ni == (SEC_ACE_FLAG_OBJECT_INHERIT|
2684 SEC_ACE_FLAG_CONTAINER_INHERIT|
2685 SEC_ACE_FLAG_INHERIT_ONLY))) {
2687 * W2K wants to have access allowed zero access ACE's
2688 * at the end of the list. If the mask is zero, merge
2689 * the non-inherited ACE onto the inherited ACE.
2692 if (nt_ace_list[i].access_mask == 0) {
2693 nt_ace_list[j].flags = SEC_ACE_FLAG_OBJECT_INHERIT|SEC_ACE_FLAG_CONTAINER_INHERIT|
2694 (i_inh ? SEC_ACE_FLAG_INHERITED_ACE : 0);
2695 if (num_aces - i - 1 > 0)
2696 memmove(&nt_ace_list[i], &nt_ace_list[i+1], (num_aces-i-1) *
2699 DEBUG(10,("merge_default_aces: Merging zero access ACE %u onto ACE %u.\n",
2700 (unsigned int)i, (unsigned int)j ));
2703 * These are identical except for the flags.
2704 * Merge the inherited ACE onto the non-inherited ACE.
2707 nt_ace_list[i].flags = SEC_ACE_FLAG_OBJECT_INHERIT|SEC_ACE_FLAG_CONTAINER_INHERIT|
2708 (i_inh ? SEC_ACE_FLAG_INHERITED_ACE : 0);
2709 if (num_aces - j - 1 > 0)
2710 memmove(&nt_ace_list[j], &nt_ace_list[j+1], (num_aces-j-1) *
2713 DEBUG(10,("merge_default_aces: Merging ACE %u onto ACE %u.\n",
2714 (unsigned int)j, (unsigned int)i ));
2724 /****************************************************************************
2725 Reply to query a security descriptor from an fsp. If it succeeds it allocates
2726 the space for the return elements and returns the size needed to return the
2727 security descriptor. This should be the only external function needed for
2728 the UNIX style get ACL.
2729 ****************************************************************************/
2731 size_t get_nt_acl(files_struct *fsp, uint32 security_info, SEC_DESC **ppdesc)
2733 connection_struct *conn = fsp->conn;
2734 SMB_STRUCT_STAT sbuf;
2735 SEC_ACE *nt_ace_list = NULL;
2739 SEC_ACL *psa = NULL;
2740 size_t num_acls = 0;
2741 size_t num_def_acls = 0;
2742 size_t num_aces = 0;
2743 SMB_ACL_T posix_acl = NULL;
2744 SMB_ACL_T def_acl = NULL;
2745 canon_ace *file_ace = NULL;
2746 canon_ace *dir_ace = NULL;
2747 size_t num_profile_acls = 0;
2748 struct pai_val *pal = NULL;
2749 SEC_DESC *psd = NULL;
2753 DEBUG(10,("get_nt_acl: called for file %s\n", fsp->fsp_name ));
2755 if(fsp->is_directory || fsp->fh->fd == -1) {
2757 /* Get the stat struct for the owner info. */
2758 if(SMB_VFS_STAT(fsp->conn,fsp->fsp_name, &sbuf) != 0) {
2762 * Get the ACL from the path.
2765 posix_acl = SMB_VFS_SYS_ACL_GET_FILE(conn, fsp->fsp_name, SMB_ACL_TYPE_ACCESS);
2768 * If it's a directory get the default POSIX ACL.
2771 if(fsp->is_directory) {
2772 def_acl = SMB_VFS_SYS_ACL_GET_FILE(conn, fsp->fsp_name, SMB_ACL_TYPE_DEFAULT);
2773 def_acl = free_empty_sys_acl(conn, def_acl);
2778 /* Get the stat struct for the owner info. */
2779 if(SMB_VFS_FSTAT(fsp,fsp->fh->fd,&sbuf) != 0) {
2783 * Get the ACL from the fd.
2785 posix_acl = SMB_VFS_SYS_ACL_GET_FD(fsp, fsp->fh->fd);
2788 DEBUG(5,("get_nt_acl : file ACL %s, directory ACL %s\n",
2789 posix_acl ? "present" : "absent",
2790 def_acl ? "present" : "absent" ));
2792 pal = load_inherited_info(fsp);
2795 * Get the owner, group and world SIDs.
2798 if (lp_profile_acls(SNUM(conn))) {
2799 /* For WXP SP1 the owner must be administrators. */
2800 sid_copy(&owner_sid, &global_sid_Builtin_Administrators);
2801 sid_copy(&group_sid, &global_sid_Builtin_Users);
2802 num_profile_acls = 2;
2804 create_file_sids(&sbuf, &owner_sid, &group_sid);
2807 if ((security_info & DACL_SECURITY_INFORMATION) && !(security_info & PROTECTED_DACL_SECURITY_INFORMATION)) {
2810 * In the optimum case Creator Owner and Creator Group would be used for
2811 * the ACL_USER_OBJ and ACL_GROUP_OBJ entries, respectively, but this
2812 * would lead to usability problems under Windows: The Creator entries
2813 * are only available in browse lists of directories and not for files;
2814 * additionally the identity of the owning group couldn't be determined.
2815 * We therefore use those identities only for Default ACLs.
2818 /* Create the canon_ace lists. */
2819 file_ace = canonicalise_acl( fsp, posix_acl, &sbuf, &owner_sid, &group_sid, pal, SMB_ACL_TYPE_ACCESS );
2821 /* We must have *some* ACLS. */
2823 if (count_canon_ace_list(file_ace) == 0) {
2824 DEBUG(0,("get_nt_acl : No ACLs on file (%s) !\n", fsp->fsp_name ));
2828 if (fsp->is_directory && def_acl) {
2829 dir_ace = canonicalise_acl(fsp, def_acl, &sbuf,
2830 &global_sid_Creator_Owner,
2831 &global_sid_Creator_Group, pal, SMB_ACL_TYPE_DEFAULT );
2835 * Create the NT ACE list from the canonical ace lists.
2843 if (nt4_compatible_acls() && dir_ace) {
2845 * NT 4 chokes if an ACL contains an INHERIT_ONLY entry
2846 * but no non-INHERIT_ONLY entry for one SID. So we only
2847 * remove entries from the Access ACL if the
2848 * corresponding Default ACL entries have also been
2849 * removed. ACEs for CREATOR-OWNER and CREATOR-GROUP
2850 * are exceptions. We can do nothing
2851 * intelligent if the Default ACL contains entries that
2852 * are not also contained in the Access ACL, so this
2853 * case will still fail under NT 4.
2856 ace = canon_ace_entry_for(dir_ace, SMB_ACL_OTHER, NULL);
2857 if (ace && !ace->perms) {
2858 DLIST_REMOVE(dir_ace, ace);
2861 ace = canon_ace_entry_for(file_ace, SMB_ACL_OTHER, NULL);
2862 if (ace && !ace->perms) {
2863 DLIST_REMOVE(file_ace, ace);
2869 * WinNT doesn't usually have Creator Group
2870 * in browse lists, so we send this entry to
2871 * WinNT even if it contains no relevant
2872 * permissions. Once we can add
2873 * Creator Group to browse lists we can
2878 ace = canon_ace_entry_for(dir_ace, SMB_ACL_GROUP_OBJ, NULL);
2879 if (ace && !ace->perms) {
2880 DLIST_REMOVE(dir_ace, ace);
2885 ace = canon_ace_entry_for(file_ace, SMB_ACL_GROUP_OBJ, NULL);
2886 if (ace && !ace->perms) {
2887 DLIST_REMOVE(file_ace, ace);
2892 num_acls = count_canon_ace_list(file_ace);
2893 num_def_acls = count_canon_ace_list(dir_ace);
2895 /* Allocate the ace list. */
2896 if ((nt_ace_list = SMB_MALLOC_ARRAY(SEC_ACE,num_acls + num_profile_acls + num_def_acls)) == NULL) {
2897 DEBUG(0,("get_nt_acl: Unable to malloc space for nt_ace_list.\n"));
2901 memset(nt_ace_list, '\0', (num_acls + num_def_acls) * sizeof(SEC_ACE) );
2904 * Create the NT ACE list from the canonical ace lists.
2909 for (i = 0; i < num_acls; i++, ace = ace->next) {
2912 acc = map_canon_ace_perms(SNUM(conn),
2916 init_sec_ace(&nt_ace_list[num_aces++],
2921 SEC_ACE_FLAG_INHERITED_ACE : 0);
2924 /* The User must have access to a profile share - even
2925 * if we can't map the SID. */
2926 if (lp_profile_acls(SNUM(conn))) {
2929 init_sec_access(&acc,FILE_GENERIC_ALL);
2930 init_sec_ace(&nt_ace_list[num_aces++],
2931 &global_sid_Builtin_Users,
2932 SEC_ACE_TYPE_ACCESS_ALLOWED,
2938 for (i = 0; i < num_def_acls; i++, ace = ace->next) {
2941 acc = map_canon_ace_perms(SNUM(conn),
2945 init_sec_ace(&nt_ace_list[num_aces++],
2949 SEC_ACE_FLAG_OBJECT_INHERIT|
2950 SEC_ACE_FLAG_CONTAINER_INHERIT|
2951 SEC_ACE_FLAG_INHERIT_ONLY|
2953 SEC_ACE_FLAG_INHERITED_ACE : 0));
2956 /* The User must have access to a profile share - even
2957 * if we can't map the SID. */
2958 if (lp_profile_acls(SNUM(conn))) {
2961 init_sec_access(&acc,FILE_GENERIC_ALL);
2962 init_sec_ace(&nt_ace_list[num_aces++], &global_sid_Builtin_Users, SEC_ACE_TYPE_ACCESS_ALLOWED, acc,
2963 SEC_ACE_FLAG_OBJECT_INHERIT|SEC_ACE_FLAG_CONTAINER_INHERIT|
2964 SEC_ACE_FLAG_INHERIT_ONLY|0);
2968 * Merge POSIX default ACLs and normal ACLs into one NT ACE.
2969 * Win2K needs this to get the inheritance correct when replacing ACLs
2970 * on a directory tree. Based on work by Jim @ IBM.
2973 num_aces = merge_default_aces(nt_ace_list, num_aces);
2978 if((psa = make_sec_acl( talloc_tos(), NT4_ACL_REVISION, num_aces, nt_ace_list)) == NULL) {
2979 DEBUG(0,("get_nt_acl: Unable to malloc space for acl.\n"));
2983 } /* security_info & DACL_SECURITY_INFORMATION */
2985 psd = make_standard_sec_desc( talloc_tos(),
2986 (security_info & OWNER_SECURITY_INFORMATION) ? &owner_sid : NULL,
2987 (security_info & GROUP_SECURITY_INFORMATION) ? &group_sid : NULL,
2992 DEBUG(0,("get_nt_acl: Unable to malloc space for security descriptor.\n"));
2998 * Windows 2000: The DACL_PROTECTED flag in the security
2999 * descriptor marks the ACL as non-inheriting, i.e., no
3000 * ACEs from higher level directories propagate to this
3001 * ACL. In the POSIX ACL model permissions are only
3002 * inherited at file create time, so ACLs never contain
3003 * any ACEs that are inherited dynamically. The DACL_PROTECTED
3004 * flag doesn't seem to bother Windows NT.
3005 * Always set this if map acl inherit is turned off.
3007 if (get_protected_flag(pal) || !lp_map_acl_inherit(SNUM(conn))) {
3008 psd->type |= SE_DESC_DACL_PROTECTED;
3012 dacl_sort_into_canonical_order(psd->dacl->aces, (unsigned int)psd->dacl->num_aces);
3020 SMB_VFS_SYS_ACL_FREE_ACL(conn, posix_acl);
3023 SMB_VFS_SYS_ACL_FREE_ACL(conn, def_acl);
3025 free_canon_ace_list(file_ace);
3026 free_canon_ace_list(dir_ace);
3027 free_inherited_info(pal);
3028 SAFE_FREE(nt_ace_list);
3033 /****************************************************************************
3034 Try to chown a file. We will be able to chown it under the following conditions.
3036 1) If we have root privileges, then it will just work.
3037 2) If we have SeTakeOwnershipPrivilege we can change the user to the current user.
3038 3) If we have SeRestorePrivilege we can change the user to any other user.
3039 4) If we have write permission to the file and dos_filemodes is set
3040 then allow chown to the currently authenticated user.
3041 ****************************************************************************/
3043 int try_chown(connection_struct *conn, const char *fname, uid_t uid, gid_t gid)
3049 if(!CAN_WRITE(conn)) {
3054 /* try the direct way first */
3055 ret = SMB_VFS_CHOWN(conn, fname, uid, gid);
3059 /* Case (2) / (3) */
3060 if (lp_enable_privileges()) {
3062 bool has_take_ownership_priv = user_has_privileges(current_user.nt_user_token,
3063 &se_take_ownership);
3064 bool has_restore_priv = user_has_privileges(current_user.nt_user_token,
3068 if ( ( has_take_ownership_priv && ( uid == current_user.ut.uid ) ) ||
3070 ( has_restore_priv ) ) {
3073 /* Keep the current file gid the same - take ownership doesn't imply group change. */
3074 ret = SMB_VFS_CHOWN(conn, fname, uid, (gid_t)-1);
3081 if (!lp_dos_filemode(SNUM(conn))) {
3086 if (SMB_VFS_STAT(conn,fname,&st)) {
3090 if (!NT_STATUS_IS_OK(open_file_fchmod(conn,fname,&st,&fsp))) {
3094 /* only allow chown to the current user. This is more secure,
3095 and also copes with the case where the SID in a take ownership ACL is
3096 a local SID on the users workstation
3098 uid = current_user.ut.uid;
3101 /* Keep the current file gid the same. */
3102 ret = SMB_VFS_FCHOWN(fsp, fsp->fh->fd, uid, (gid_t)-1);
3105 close_file_fchmod(fsp);
3110 static NTSTATUS append_ugw_ace(files_struct *fsp,
3111 SMB_STRUCT_STAT *psbuf,
3123 perms = unix_perms_to_acl_perms(unx_mode,
3127 uid_to_sid(&trustee, psbuf->st_uid );
3130 perms = unix_perms_to_acl_perms(unx_mode,
3134 gid_to_sid(&trustee, psbuf->st_gid );
3137 perms = unix_perms_to_acl_perms(unx_mode,
3141 sid_copy(&trustee, &global_sid_World);
3144 return NT_STATUS_INVALID_PARAMETER;
3146 acc = map_canon_ace_perms(SNUM(fsp->conn),
3156 return NT_STATUS_OK;
3159 /****************************************************************************
3161 ****************************************************************************/
3163 static NTSTATUS append_parent_acl(files_struct *fsp,
3164 SMB_STRUCT_STAT *psbuf,
3166 SEC_DESC **pp_new_sd)
3168 SEC_DESC *parent_sd = NULL;
3169 files_struct *parent_fsp = NULL;
3170 TALLOC_CTX *mem_ctx = talloc_parent(psd);
3171 char *parent_name = NULL;
3172 SEC_ACE *new_ace = NULL;
3173 unsigned int num_aces = psd->dacl->num_aces;
3174 SMB_STRUCT_STAT sbuf;
3183 if (mem_ctx == NULL) {
3184 return NT_STATUS_NO_MEMORY;
3187 if (!parent_dirname_talloc(mem_ctx,
3191 return NT_STATUS_NO_MEMORY;
3194 /* Create a default mode for u/g/w. */
3195 unx_mode = unix_mode(fsp->conn,
3196 aARCH | (fsp->is_directory ? aDIR : 0),
3200 status = open_directory(fsp->conn,
3204 FILE_READ_ATTRIBUTES, /* Just a stat open */
3205 FILE_SHARE_NONE, /* Ignored for stat opens */
3212 if (!NT_STATUS_IS_OK(status)) {
3216 sd_size = SMB_VFS_GET_NT_ACL(parent_fsp, parent_fsp->fsp_name,
3217 DACL_SECURITY_INFORMATION, &parent_sd );
3219 close_file(parent_fsp, NORMAL_CLOSE);
3222 return NT_STATUS_ACCESS_DENIED;
3226 * Make room for potentially all the ACLs from
3227 * the parent, plus the user/group/other triple.
3230 num_aces += parent_sd->dacl->num_aces + 3;
3232 if((new_ace = TALLOC_ZERO_ARRAY(mem_ctx, SEC_ACE,
3233 num_aces)) == NULL) {
3234 return NT_STATUS_NO_MEMORY;
3237 DEBUG(10,("append_parent_acl: parent ACL has %u entries. New "
3238 "ACL has %u entries\n",
3239 parent_sd->dacl->num_aces, num_aces ));
3241 /* Start by copying in all the given ACE entries. */
3242 for (i = 0; i < psd->dacl->num_aces; i++) {
3243 sec_ace_copy(&new_ace[i], &psd->dacl->aces[i]);
3247 * Note that we're ignoring "inherit permissions" here
3248 * as that really only applies to newly created files. JRA.
3255 status = append_ugw_ace(fsp, psbuf, unx_mode, S_IRUSR, &new_ace[i++]);
3256 if (!NT_STATUS_IS_OK(status)) {
3259 status = append_ugw_ace(fsp, psbuf, unx_mode, S_IRGRP, &new_ace[i++]);
3260 if (!NT_STATUS_IS_OK(status)) {
3263 status = append_ugw_ace(fsp, psbuf, unx_mode, S_IROTH, &new_ace[i++]);
3264 if (!NT_STATUS_IS_OK(status)) {
3268 /* Finally append any inherited ACEs. */
3269 for (j = 0; j < parent_sd->dacl->num_aces; j++) {
3270 SEC_ACE *se = &parent_sd->dacl->aces[j];
3271 uint32 i_flags = se->flags & (SEC_ACE_FLAG_OBJECT_INHERIT|
3272 SEC_ACE_FLAG_CONTAINER_INHERIT|
3273 SEC_ACE_FLAG_INHERIT_ONLY);
3275 if (fsp->is_directory) {
3276 if (i_flags == SEC_ACE_FLAG_OBJECT_INHERIT) {
3277 /* Should only apply to a file - ignore. */
3281 if ((i_flags & (SEC_ACE_FLAG_OBJECT_INHERIT|
3282 SEC_ACE_FLAG_INHERIT_ONLY)) !=
3283 SEC_ACE_FLAG_OBJECT_INHERIT) {
3284 /* Should not apply to a file - ignore. */
3288 sec_ace_copy(&new_ace[i], se);
3289 if (se->flags & SEC_ACE_FLAG_NO_PROPAGATE_INHERIT) {
3290 new_ace[i].flags &= ~(SEC_ACE_FLAG_VALID_INHERIT);
3292 new_ace[i].flags |= SEC_ACE_FLAG_INHERITED_ACE;
3296 parent_sd->dacl->aces = new_ace;
3297 parent_sd->dacl->num_aces = i;
3299 *pp_new_sd = parent_sd;
3303 /****************************************************************************
3304 Reply to set a security descriptor on an fsp. security_info_sent is the
3305 description of the following NT ACL.
3306 This should be the only external function needed for the UNIX style set ACL.
3307 ****************************************************************************/
3309 NTSTATUS set_nt_acl(files_struct *fsp, uint32 security_info_sent, SEC_DESC *psd)
3311 connection_struct *conn = fsp->conn;
3312 uid_t user = (uid_t)-1;
3313 gid_t grp = (gid_t)-1;
3314 SMB_STRUCT_STAT sbuf;
3315 DOM_SID file_owner_sid;
3316 DOM_SID file_grp_sid;
3317 canon_ace *file_ace_list = NULL;
3318 canon_ace *dir_ace_list = NULL;
3319 bool acl_perms = False;
3320 mode_t orig_mode = (mode_t)0;
3323 DEBUG(10,("set_nt_acl: called for file %s\n", fsp->fsp_name ));
3325 if (!CAN_WRITE(conn)) {
3326 DEBUG(10,("set acl rejected on read-only share\n"));
3327 return NT_STATUS_MEDIA_WRITE_PROTECTED;
3331 * Get the current state of the file.
3334 if(fsp->is_directory || fsp->fh->fd == -1) {
3335 if(SMB_VFS_STAT(fsp->conn,fsp->fsp_name, &sbuf) != 0)
3336 return map_nt_error_from_unix(errno);
3338 if(SMB_VFS_FSTAT(fsp,fsp->fh->fd,&sbuf) != 0)
3339 return map_nt_error_from_unix(errno);
3342 /* Save the original elements we check against. */
3343 orig_mode = sbuf.st_mode;
3346 * Unpack the user/group/world id's.
3349 status = unpack_nt_owners( SNUM(conn), &user, &grp, security_info_sent, psd);
3350 if (!NT_STATUS_IS_OK(status)) {
3355 * Do we need to chown ?
3358 if (((user != (uid_t)-1) && (sbuf.st_uid != user)) || (( grp != (gid_t)-1) && (sbuf.st_gid != grp))) {
3360 DEBUG(3,("set_nt_acl: chown %s. uid = %u, gid = %u.\n",
3361 fsp->fsp_name, (unsigned int)user, (unsigned int)grp ));
3363 if(try_chown( fsp->conn, fsp->fsp_name, user, grp) == -1) {
3364 DEBUG(3,("set_nt_acl: chown %s, %u, %u failed. Error = %s.\n",
3365 fsp->fsp_name, (unsigned int)user, (unsigned int)grp, strerror(errno) ));
3366 if (errno == EPERM) {
3367 return NT_STATUS_INVALID_OWNER;
3369 return map_nt_error_from_unix(errno);
3373 * Recheck the current state of the file, which may have changed.
3374 * (suid/sgid bits, for instance)
3377 if(fsp->is_directory) {
3378 if(SMB_VFS_STAT(fsp->conn, fsp->fsp_name, &sbuf) != 0) {
3379 return map_nt_error_from_unix(errno);
3385 if(fsp->fh->fd == -1)
3386 ret = SMB_VFS_STAT(fsp->conn, fsp->fsp_name, &sbuf);
3388 ret = SMB_VFS_FSTAT(fsp,fsp->fh->fd,&sbuf);
3391 return map_nt_error_from_unix(errno);
3394 /* Save the original elements we check against. */
3395 orig_mode = sbuf.st_mode;
3398 create_file_sids(&sbuf, &file_owner_sid, &file_grp_sid);
3400 if ((security_info_sent & DACL_SECURITY_INFORMATION) &&
3401 psd->dacl != NULL &&
3402 (psd->type & (SE_DESC_DACL_AUTO_INHERITED|
3403 SE_DESC_DACL_AUTO_INHERIT_REQ))==
3404 (SE_DESC_DACL_AUTO_INHERITED|
3405 SE_DESC_DACL_AUTO_INHERIT_REQ) ) {
3406 status = append_parent_acl(fsp, &sbuf, psd, &psd);
3407 if (!NT_STATUS_IS_OK(status)) {
3412 acl_perms = unpack_canon_ace( fsp, &sbuf, &file_owner_sid, &file_grp_sid,
3413 &file_ace_list, &dir_ace_list, security_info_sent, psd);
3415 /* Ignore W2K traverse DACL set. */
3416 if (file_ace_list || dir_ace_list) {
3419 DEBUG(3,("set_nt_acl: cannot set permissions\n"));
3420 free_canon_ace_list(file_ace_list);
3421 free_canon_ace_list(dir_ace_list);
3422 return NT_STATUS_ACCESS_DENIED;
3426 * Only change security if we got a DACL.
3429 if((security_info_sent & DACL_SECURITY_INFORMATION) && (psd->dacl != NULL)) {
3431 bool acl_set_support = False;
3435 * Try using the POSIX ACL set first. Fall back to chmod if
3436 * we have no ACL support on this filesystem.
3439 if (acl_perms && file_ace_list) {
3440 ret = set_canon_ace_list(fsp, file_ace_list, False, sbuf.st_gid, &acl_set_support);
3441 if (acl_set_support && ret == False) {
3442 DEBUG(3,("set_nt_acl: failed to set file acl on file %s (%s).\n", fsp->fsp_name, strerror(errno) ));
3443 free_canon_ace_list(file_ace_list);
3444 free_canon_ace_list(dir_ace_list);
3445 return map_nt_error_from_unix(errno);
3449 if (acl_perms && acl_set_support && fsp->is_directory) {
3451 if (!set_canon_ace_list(fsp, dir_ace_list, True, sbuf.st_gid, &acl_set_support)) {
3452 DEBUG(3,("set_nt_acl: failed to set default acl on directory %s (%s).\n", fsp->fsp_name, strerror(errno) ));
3453 free_canon_ace_list(file_ace_list);
3454 free_canon_ace_list(dir_ace_list);
3455 return map_nt_error_from_unix(errno);
3460 * No default ACL - delete one if it exists.
3463 if (SMB_VFS_SYS_ACL_DELETE_DEF_FILE(conn, fsp->fsp_name) == -1) {
3466 if (acl_group_override(conn, sbuf.st_gid)) {
3467 DEBUG(5,("set_nt_acl: acl group control on and "
3468 "current user in file %s primary group. Override delete_def_acl\n",
3472 sret = SMB_VFS_SYS_ACL_DELETE_DEF_FILE(conn, fsp->fsp_name);
3477 DEBUG(3,("set_nt_acl: sys_acl_delete_def_file failed (%s)\n", strerror(errno)));
3478 free_canon_ace_list(file_ace_list);
3479 free_canon_ace_list(dir_ace_list);
3480 return map_nt_error_from_unix(errno);
3486 if (acl_set_support) {
3487 store_inheritance_attributes(fsp, file_ace_list, dir_ace_list,
3488 (psd->type & SE_DESC_DACL_PROTECTED) ? True : False);
3492 * If we cannot set using POSIX ACLs we fall back to checking if we need to chmod.
3495 if(!acl_set_support && acl_perms) {
3498 if (!convert_canon_ace_to_posix_perms( fsp, file_ace_list, &posix_perms)) {
3499 free_canon_ace_list(file_ace_list);
3500 free_canon_ace_list(dir_ace_list);
3501 DEBUG(3,("set_nt_acl: failed to convert file acl to posix permissions for file %s.\n",
3503 return NT_STATUS_ACCESS_DENIED;
3506 if (orig_mode != posix_perms) {
3508 DEBUG(3,("set_nt_acl: chmod %s. perms = 0%o.\n",
3509 fsp->fsp_name, (unsigned int)posix_perms ));
3511 if(SMB_VFS_CHMOD(conn,fsp->fsp_name, posix_perms) == -1) {
3513 if (acl_group_override(conn, sbuf.st_gid)) {
3514 DEBUG(5,("set_nt_acl: acl group control on and "
3515 "current user in file %s primary group. Override chmod\n",
3519 sret = SMB_VFS_CHMOD(conn,fsp->fsp_name, posix_perms);
3524 DEBUG(3,("set_nt_acl: chmod %s, 0%o failed. Error = %s.\n",
3525 fsp->fsp_name, (unsigned int)posix_perms, strerror(errno) ));
3526 free_canon_ace_list(file_ace_list);
3527 free_canon_ace_list(dir_ace_list);
3528 return map_nt_error_from_unix(errno);
3535 free_canon_ace_list(file_ace_list);
3536 free_canon_ace_list(dir_ace_list);
3539 return NT_STATUS_OK;
3542 /****************************************************************************
3543 Get the actual group bits stored on a file with an ACL. Has no effect if
3544 the file has no ACL. Needed in dosmode code where the stat() will return
3545 the mask bits, not the real group bits, for a file with an ACL.
3546 ****************************************************************************/
3548 int get_acl_group_bits( connection_struct *conn, const char *fname, mode_t *mode )
3550 int entry_id = SMB_ACL_FIRST_ENTRY;
3551 SMB_ACL_ENTRY_T entry;
3552 SMB_ACL_T posix_acl;
3555 posix_acl = SMB_VFS_SYS_ACL_GET_FILE(conn, fname, SMB_ACL_TYPE_ACCESS);
3556 if (posix_acl == (SMB_ACL_T)NULL)
3559 while (SMB_VFS_SYS_ACL_GET_ENTRY(conn, posix_acl, entry_id, &entry) == 1) {
3560 SMB_ACL_TAG_T tagtype;
3561 SMB_ACL_PERMSET_T permset;
3564 if (entry_id == SMB_ACL_FIRST_ENTRY)
3565 entry_id = SMB_ACL_NEXT_ENTRY;
3567 if (SMB_VFS_SYS_ACL_GET_TAG_TYPE(conn, entry, &tagtype) ==-1)
3570 if (tagtype == SMB_ACL_GROUP_OBJ) {
3571 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, entry, &permset) == -1) {
3574 *mode &= ~(S_IRGRP|S_IWGRP|S_IXGRP);
3575 *mode |= (SMB_VFS_SYS_ACL_GET_PERM(conn, permset, SMB_ACL_READ) ? S_IRGRP : 0);
3576 *mode |= (SMB_VFS_SYS_ACL_GET_PERM(conn, permset, SMB_ACL_WRITE) ? S_IWGRP : 0);
3577 *mode |= (SMB_VFS_SYS_ACL_GET_PERM(conn, permset, SMB_ACL_EXECUTE) ? S_IXGRP : 0);
3583 SMB_VFS_SYS_ACL_FREE_ACL(conn, posix_acl);
3587 /****************************************************************************
3588 Do a chmod by setting the ACL USER_OBJ, GROUP_OBJ and OTHER bits in an ACL
3589 and set the mask to rwx. Needed to preserve complex ACLs set by NT.
3590 ****************************************************************************/
3592 static int chmod_acl_internals( connection_struct *conn, SMB_ACL_T posix_acl, mode_t mode)
3594 int entry_id = SMB_ACL_FIRST_ENTRY;
3595 SMB_ACL_ENTRY_T entry;
3596 int num_entries = 0;
3598 while ( SMB_VFS_SYS_ACL_GET_ENTRY(conn, posix_acl, entry_id, &entry) == 1) {
3599 SMB_ACL_TAG_T tagtype;
3600 SMB_ACL_PERMSET_T permset;
3604 if (entry_id == SMB_ACL_FIRST_ENTRY)
3605 entry_id = SMB_ACL_NEXT_ENTRY;
3607 if (SMB_VFS_SYS_ACL_GET_TAG_TYPE(conn, entry, &tagtype) == -1)
3610 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, entry, &permset) == -1)
3616 case SMB_ACL_USER_OBJ:
3617 perms = unix_perms_to_acl_perms(mode, S_IRUSR, S_IWUSR, S_IXUSR);
3619 case SMB_ACL_GROUP_OBJ:
3620 perms = unix_perms_to_acl_perms(mode, S_IRGRP, S_IWGRP, S_IXGRP);
3624 * FIXME: The ACL_MASK entry permissions should really be set to
3625 * the union of the permissions of all ACL_USER,
3626 * ACL_GROUP_OBJ, and ACL_GROUP entries. That's what
3627 * acl_calc_mask() does, but Samba ACLs doesn't provide it.
3629 perms = S_IRUSR|S_IWUSR|S_IXUSR;
3632 perms = unix_perms_to_acl_perms(mode, S_IROTH, S_IWOTH, S_IXOTH);
3638 if (map_acl_perms_to_permset(conn, perms, &permset) == -1)
3641 if (SMB_VFS_SYS_ACL_SET_PERMSET(conn, entry, permset) == -1)
3646 * If this is a simple 3 element ACL or no elements then it's a standard
3647 * UNIX permission set. Just use chmod...
3650 if ((num_entries == 3) || (num_entries == 0))
3656 /****************************************************************************
3657 Get the access ACL of FROM, do a chmod by setting the ACL USER_OBJ,
3658 GROUP_OBJ and OTHER bits in an ACL and set the mask to rwx. Set the
3659 resulting ACL on TO. Note that name is in UNIX character set.
3660 ****************************************************************************/
3662 static int copy_access_acl(connection_struct *conn, const char *from, const char *to, mode_t mode)
3664 SMB_ACL_T posix_acl = NULL;
3667 if ((posix_acl = SMB_VFS_SYS_ACL_GET_FILE(conn, from, SMB_ACL_TYPE_ACCESS)) == NULL)
3670 if ((ret = chmod_acl_internals(conn, posix_acl, mode)) == -1)
3673 ret = SMB_VFS_SYS_ACL_SET_FILE(conn, to, SMB_ACL_TYPE_ACCESS, posix_acl);
3677 SMB_VFS_SYS_ACL_FREE_ACL(conn, posix_acl);
3681 /****************************************************************************
3682 Do a chmod by setting the ACL USER_OBJ, GROUP_OBJ and OTHER bits in an ACL
3683 and set the mask to rwx. Needed to preserve complex ACLs set by NT.
3684 Note that name is in UNIX character set.
3685 ****************************************************************************/
3687 int chmod_acl(connection_struct *conn, const char *name, mode_t mode)
3689 return copy_access_acl(conn, name, name, mode);
3692 /****************************************************************************
3693 If the parent directory has no default ACL but it does have an Access ACL,
3694 inherit this Access ACL to file name.
3695 ****************************************************************************/
3697 int inherit_access_acl(connection_struct *conn, const char *inherit_from_dir,
3698 const char *name, mode_t mode)
3700 if (directory_has_default_acl(conn, inherit_from_dir))
3703 return copy_access_acl(conn, inherit_from_dir, name, mode);
3706 /****************************************************************************
3707 Do an fchmod by setting the ACL USER_OBJ, GROUP_OBJ and OTHER bits in an ACL
3708 and set the mask to rwx. Needed to preserve complex ACLs set by NT.
3709 ****************************************************************************/
3711 int fchmod_acl(files_struct *fsp, int fd, mode_t mode)
3713 connection_struct *conn = fsp->conn;
3714 SMB_ACL_T posix_acl = NULL;
3717 if ((posix_acl = SMB_VFS_SYS_ACL_GET_FD(fsp, fd)) == NULL)
3720 if ((ret = chmod_acl_internals(conn, posix_acl, mode)) == -1)
3723 ret = SMB_VFS_SYS_ACL_SET_FD(fsp, fd, posix_acl);
3727 SMB_VFS_SYS_ACL_FREE_ACL(conn, posix_acl);
3731 /****************************************************************************
3732 Check for an existing default POSIX ACL on a directory.
3733 ****************************************************************************/
3735 bool directory_has_default_acl(connection_struct *conn, const char *fname)
3737 SMB_ACL_T def_acl = SMB_VFS_SYS_ACL_GET_FILE( conn, fname, SMB_ACL_TYPE_DEFAULT);
3738 bool has_acl = False;
3739 SMB_ACL_ENTRY_T entry;
3741 if (def_acl != NULL && (SMB_VFS_SYS_ACL_GET_ENTRY(conn, def_acl, SMB_ACL_FIRST_ENTRY, &entry) == 1)) {
3746 SMB_VFS_SYS_ACL_FREE_ACL(conn, def_acl);
3751 /****************************************************************************
3752 Map from wire type to permset.
3753 ****************************************************************************/
3755 static bool unix_ex_wire_to_permset(connection_struct *conn, unsigned char wire_perm, SMB_ACL_PERMSET_T *p_permset)
3757 if (wire_perm & ~(SMB_POSIX_ACL_READ|SMB_POSIX_ACL_WRITE|SMB_POSIX_ACL_EXECUTE)) {
3761 if (SMB_VFS_SYS_ACL_CLEAR_PERMS(conn, *p_permset) == -1) {
3765 if (wire_perm & SMB_POSIX_ACL_READ) {
3766 if (SMB_VFS_SYS_ACL_ADD_PERM(conn, *p_permset, SMB_ACL_READ) == -1) {
3770 if (wire_perm & SMB_POSIX_ACL_WRITE) {
3771 if (SMB_VFS_SYS_ACL_ADD_PERM(conn, *p_permset, SMB_ACL_WRITE) == -1) {
3775 if (wire_perm & SMB_POSIX_ACL_EXECUTE) {
3776 if (SMB_VFS_SYS_ACL_ADD_PERM(conn, *p_permset, SMB_ACL_EXECUTE) == -1) {
3783 /****************************************************************************
3784 Map from wire type to tagtype.
3785 ****************************************************************************/
3787 static bool unix_ex_wire_to_tagtype(unsigned char wire_tt, SMB_ACL_TAG_T *p_tt)
3790 case SMB_POSIX_ACL_USER_OBJ:
3791 *p_tt = SMB_ACL_USER_OBJ;
3793 case SMB_POSIX_ACL_USER:
3794 *p_tt = SMB_ACL_USER;
3796 case SMB_POSIX_ACL_GROUP_OBJ:
3797 *p_tt = SMB_ACL_GROUP_OBJ;
3799 case SMB_POSIX_ACL_GROUP:
3800 *p_tt = SMB_ACL_GROUP;
3802 case SMB_POSIX_ACL_MASK:
3803 *p_tt = SMB_ACL_MASK;
3805 case SMB_POSIX_ACL_OTHER:
3806 *p_tt = SMB_ACL_OTHER;
3814 /****************************************************************************
3815 Create a new POSIX acl from wire permissions.
3816 FIXME ! How does the share mask/mode fit into this.... ?
3817 ****************************************************************************/
3819 static SMB_ACL_T create_posix_acl_from_wire(connection_struct *conn, uint16 num_acls, const char *pdata)
3822 SMB_ACL_T the_acl = SMB_VFS_SYS_ACL_INIT(conn, num_acls);
3824 if (the_acl == NULL) {
3828 for (i = 0; i < num_acls; i++) {
3829 SMB_ACL_ENTRY_T the_entry;
3830 SMB_ACL_PERMSET_T the_permset;
3831 SMB_ACL_TAG_T tag_type;
3833 if (SMB_VFS_SYS_ACL_CREATE_ENTRY(conn, &the_acl, &the_entry) == -1) {
3834 DEBUG(0,("create_posix_acl_from_wire: Failed to create entry %u. (%s)\n",
3835 i, strerror(errno) ));
3839 if (!unix_ex_wire_to_tagtype(CVAL(pdata,(i*SMB_POSIX_ACL_ENTRY_SIZE)), &tag_type)) {
3840 DEBUG(0,("create_posix_acl_from_wire: invalid wire tagtype %u on entry %u.\n",
3841 CVAL(pdata,(i*SMB_POSIX_ACL_ENTRY_SIZE)), i ));
3845 if (SMB_VFS_SYS_ACL_SET_TAG_TYPE(conn, the_entry, tag_type) == -1) {
3846 DEBUG(0,("create_posix_acl_from_wire: Failed to set tagtype on entry %u. (%s)\n",
3847 i, strerror(errno) ));
3851 /* Get the permset pointer from the new ACL entry. */
3852 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, the_entry, &the_permset) == -1) {
3853 DEBUG(0,("create_posix_acl_from_wire: Failed to get permset on entry %u. (%s)\n",
3854 i, strerror(errno) ));
3858 /* Map from wire to permissions. */
3859 if (!unix_ex_wire_to_permset(conn, CVAL(pdata,(i*SMB_POSIX_ACL_ENTRY_SIZE)+1), &the_permset)) {
3860 DEBUG(0,("create_posix_acl_from_wire: invalid permset %u on entry %u.\n",
3861 CVAL(pdata,(i*SMB_POSIX_ACL_ENTRY_SIZE) + 1), i ));
3865 /* Now apply to the new ACL entry. */
3866 if (SMB_VFS_SYS_ACL_SET_PERMSET(conn, the_entry, the_permset) == -1) {
3867 DEBUG(0,("create_posix_acl_from_wire: Failed to add permset on entry %u. (%s)\n",
3868 i, strerror(errno) ));
3872 if (tag_type == SMB_ACL_USER) {
3873 uint32 uidval = IVAL(pdata,(i*SMB_POSIX_ACL_ENTRY_SIZE)+2);
3874 uid_t uid = (uid_t)uidval;
3875 if (SMB_VFS_SYS_ACL_SET_QUALIFIER(conn, the_entry,(void *)&uid) == -1) {
3876 DEBUG(0,("create_posix_acl_from_wire: Failed to set uid %u on entry %u. (%s)\n",
3877 (unsigned int)uid, i, strerror(errno) ));
3882 if (tag_type == SMB_ACL_GROUP) {
3883 uint32 gidval = IVAL(pdata,(i*SMB_POSIX_ACL_ENTRY_SIZE)+2);
3884 gid_t gid = (uid_t)gidval;
3885 if (SMB_VFS_SYS_ACL_SET_QUALIFIER(conn, the_entry,(void *)&gid) == -1) {
3886 DEBUG(0,("create_posix_acl_from_wire: Failed to set gid %u on entry %u. (%s)\n",
3887 (unsigned int)gid, i, strerror(errno) ));
3897 if (the_acl != NULL) {
3898 SMB_VFS_SYS_ACL_FREE_ACL(conn, the_acl);
3903 /****************************************************************************
3904 Calls from UNIX extensions - Default POSIX ACL set.
3905 If num_def_acls == 0 and not a directory just return. If it is a directory
3906 and num_def_acls == 0 then remove the default acl. Else set the default acl
3908 ****************************************************************************/
3910 bool set_unix_posix_default_acl(connection_struct *conn, const char *fname, SMB_STRUCT_STAT *psbuf,
3911 uint16 num_def_acls, const char *pdata)
3913 SMB_ACL_T def_acl = NULL;
3915 if (num_def_acls && !S_ISDIR(psbuf->st_mode)) {
3916 DEBUG(5,("set_unix_posix_default_acl: Can't set default ACL on non-directory file %s\n", fname ));
3921 if (!num_def_acls) {
3922 /* Remove the default ACL. */
3923 if (SMB_VFS_SYS_ACL_DELETE_DEF_FILE(conn, fname) == -1) {
3924 DEBUG(5,("set_unix_posix_default_acl: acl_delete_def_file failed on directory %s (%s)\n",
3925 fname, strerror(errno) ));
3931 if ((def_acl = create_posix_acl_from_wire(conn, num_def_acls, pdata)) == NULL) {
3935 if (SMB_VFS_SYS_ACL_SET_FILE(conn, fname, SMB_ACL_TYPE_DEFAULT, def_acl) == -1) {
3936 DEBUG(5,("set_unix_posix_default_acl: acl_set_file failed on directory %s (%s)\n",
3937 fname, strerror(errno) ));
3938 SMB_VFS_SYS_ACL_FREE_ACL(conn, def_acl);
3942 DEBUG(10,("set_unix_posix_default_acl: set default acl for file %s\n", fname ));
3943 SMB_VFS_SYS_ACL_FREE_ACL(conn, def_acl);
3947 /****************************************************************************
3948 Remove an ACL from a file. As we don't have acl_delete_entry() available
3949 we must read the current acl and copy all entries except MASK, USER and GROUP
3950 to a new acl, then set that. This (at least on Linux) causes any ACL to be
3952 FIXME ! How does the share mask/mode fit into this.... ?
3953 ****************************************************************************/
3955 static bool remove_posix_acl(connection_struct *conn, files_struct *fsp, const char *fname)
3957 SMB_ACL_T file_acl = NULL;
3958 int entry_id = SMB_ACL_FIRST_ENTRY;
3959 SMB_ACL_ENTRY_T entry;
3961 /* Create a new ACL with only 3 entries, u/g/w. */
3962 SMB_ACL_T new_file_acl = SMB_VFS_SYS_ACL_INIT(conn, 3);
3963 SMB_ACL_ENTRY_T user_ent = NULL;
3964 SMB_ACL_ENTRY_T group_ent = NULL;
3965 SMB_ACL_ENTRY_T other_ent = NULL;
3967 if (new_file_acl == NULL) {
3968 DEBUG(5,("remove_posix_acl: failed to init new ACL with 3 entries for file %s.\n", fname));
3972 /* Now create the u/g/w entries. */
3973 if (SMB_VFS_SYS_ACL_CREATE_ENTRY(conn, &new_file_acl, &user_ent) == -1) {
3974 DEBUG(5,("remove_posix_acl: Failed to create user entry for file %s. (%s)\n",
3975 fname, strerror(errno) ));
3978 if (SMB_VFS_SYS_ACL_SET_TAG_TYPE(conn, user_ent, SMB_ACL_USER_OBJ) == -1) {
3979 DEBUG(5,("remove_posix_acl: Failed to set user entry for file %s. (%s)\n",
3980 fname, strerror(errno) ));
3984 if (SMB_VFS_SYS_ACL_CREATE_ENTRY(conn, &new_file_acl, &group_ent) == -1) {
3985 DEBUG(5,("remove_posix_acl: Failed to create group entry for file %s. (%s)\n",
3986 fname, strerror(errno) ));
3989 if (SMB_VFS_SYS_ACL_SET_TAG_TYPE(conn, group_ent, SMB_ACL_GROUP_OBJ) == -1) {
3990 DEBUG(5,("remove_posix_acl: Failed to set group entry for file %s. (%s)\n",
3991 fname, strerror(errno) ));
3995 if (SMB_VFS_SYS_ACL_CREATE_ENTRY(conn, &new_file_acl, &other_ent) == -1) {
3996 DEBUG(5,("remove_posix_acl: Failed to create other entry for file %s. (%s)\n",
3997 fname, strerror(errno) ));
4000 if (SMB_VFS_SYS_ACL_SET_TAG_TYPE(conn, other_ent, SMB_ACL_OTHER) == -1) {
4001 DEBUG(5,("remove_posix_acl: Failed to set other entry for file %s. (%s)\n",
4002 fname, strerror(errno) ));
4006 /* Get the current file ACL. */
4007 if (fsp && fsp->fh->fd != -1) {
4008 file_acl = SMB_VFS_SYS_ACL_GET_FD(fsp, fsp->fh->fd);
4010 file_acl = SMB_VFS_SYS_ACL_GET_FILE( conn, fname, SMB_ACL_TYPE_ACCESS);
4013 if (file_acl == NULL) {
4014 /* This is only returned if an error occurred. Even for a file with
4015 no acl a u/g/w acl should be returned. */
4016 DEBUG(5,("remove_posix_acl: failed to get ACL from file %s (%s).\n",
4017 fname, strerror(errno) ));
4021 while ( SMB_VFS_SYS_ACL_GET_ENTRY(conn, file_acl, entry_id, &entry) == 1) {
4022 SMB_ACL_TAG_T tagtype;
4023 SMB_ACL_PERMSET_T permset;
4026 if (entry_id == SMB_ACL_FIRST_ENTRY)
4027 entry_id = SMB_ACL_NEXT_ENTRY;
4029 if (SMB_VFS_SYS_ACL_GET_TAG_TYPE(conn, entry, &tagtype) == -1) {
4030 DEBUG(5,("remove_posix_acl: failed to get tagtype from ACL on file %s (%s).\n",
4031 fname, strerror(errno) ));
4035 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, entry, &permset) == -1) {
4036 DEBUG(5,("remove_posix_acl: failed to get permset from ACL on file %s (%s).\n",
4037 fname, strerror(errno) ));
4041 if (tagtype == SMB_ACL_USER_OBJ) {
4042 if (SMB_VFS_SYS_ACL_SET_PERMSET(conn, user_ent, permset) == -1) {
4043 DEBUG(5,("remove_posix_acl: failed to set permset from ACL on file %s (%s).\n",
4044 fname, strerror(errno) ));
4046 } else if (tagtype == SMB_ACL_GROUP_OBJ) {
4047 if (SMB_VFS_SYS_ACL_SET_PERMSET(conn, group_ent, permset) == -1) {
4048 DEBUG(5,("remove_posix_acl: failed to set permset from ACL on file %s (%s).\n",
4049 fname, strerror(errno) ));
4051 } else if (tagtype == SMB_ACL_OTHER) {
4052 if (SMB_VFS_SYS_ACL_SET_PERMSET(conn, other_ent, permset) == -1) {
4053 DEBUG(5,("remove_posix_acl: failed to set permset from ACL on file %s (%s).\n",
4054 fname, strerror(errno) ));
4059 /* Set the new empty file ACL. */
4060 if (fsp && fsp->fh->fd != -1) {
4061 if (SMB_VFS_SYS_ACL_SET_FD(fsp, fsp->fh->fd, new_file_acl) == -1) {
4062 DEBUG(5,("remove_posix_acl: acl_set_file failed on %s (%s)\n",
4063 fname, strerror(errno) ));
4067 if (SMB_VFS_SYS_ACL_SET_FILE(conn, fname, SMB_ACL_TYPE_ACCESS, new_file_acl) == -1) {
4068 DEBUG(5,("remove_posix_acl: acl_set_file failed on %s (%s)\n",
4069 fname, strerror(errno) ));
4079 SMB_VFS_SYS_ACL_FREE_ACL(conn, file_acl);
4082 SMB_VFS_SYS_ACL_FREE_ACL(conn, new_file_acl);
4087 /****************************************************************************
4088 Calls from UNIX extensions - POSIX ACL set.
4089 If num_def_acls == 0 then read/modify/write acl after removing all entries
4090 except SMB_ACL_USER_OBJ, SMB_ACL_GROUP_OBJ, SMB_ACL_OTHER.
4091 ****************************************************************************/
4093 bool set_unix_posix_acl(connection_struct *conn, files_struct *fsp, const char *fname, uint16 num_acls, const char *pdata)
4095 SMB_ACL_T file_acl = NULL;
4098 /* Remove the ACL from the file. */
4099 return remove_posix_acl(conn, fsp, fname);
4102 if ((file_acl = create_posix_acl_from_wire(conn, num_acls, pdata)) == NULL) {
4106 if (fsp && fsp->fh->fd != -1) {
4107 /* The preferred way - use an open fd. */
4108 if (SMB_VFS_SYS_ACL_SET_FD(fsp, fsp->fh->fd, file_acl) == -1) {
4109 DEBUG(5,("set_unix_posix_acl: acl_set_file failed on %s (%s)\n",
4110 fname, strerror(errno) ));
4111 SMB_VFS_SYS_ACL_FREE_ACL(conn, file_acl);
4115 if (SMB_VFS_SYS_ACL_SET_FILE(conn, fname, SMB_ACL_TYPE_ACCESS, file_acl) == -1) {
4116 DEBUG(5,("set_unix_posix_acl: acl_set_file failed on %s (%s)\n",
4117 fname, strerror(errno) ));
4118 SMB_VFS_SYS_ACL_FREE_ACL(conn, file_acl);
4123 DEBUG(10,("set_unix_posix_acl: set acl for file %s\n", fname ));
4124 SMB_VFS_SYS_ACL_FREE_ACL(conn, file_acl);
4128 /********************************************************************
4129 Pull the NT ACL from a file on disk or the OpenEventlog() access
4130 check. Caller is responsible for freeing the returned security
4131 descriptor via TALLOC_FREE(). This is designed for dealing with
4132 user space access checks in smbd outside of the VFS. For example,
4133 checking access rights in OpenEventlog().
4135 Assume we are dealing with files (for now)
4136 ********************************************************************/
4138 SEC_DESC *get_nt_acl_no_snum( TALLOC_CTX *ctx, const char *fname)
4140 SEC_DESC *psd, *ret_sd;
4141 connection_struct conn;
4143 struct fd_handle fh;
4145 ZERO_STRUCT( conn );
4147 if ( !(conn.mem_ctx = talloc_init( "novfs_get_nt_acl" )) ) {
4148 DEBUG(0,("get_nt_acl_no_snum: talloc() failed!\n"));
4152 if (!(conn.params = TALLOC_P(conn.mem_ctx, struct share_params))) {
4153 DEBUG(0,("get_nt_acl_no_snum: talloc() failed!\n"));
4154 TALLOC_FREE(conn.mem_ctx);
4158 conn.params->service = -1;
4160 set_conn_connectpath(&conn, "/");
4162 if (!smbd_vfs_init(&conn)) {
4163 DEBUG(0,("get_nt_acl_no_snum: Unable to create a fake connection struct!\n"));
4164 conn_free_internal( &conn );
4168 ZERO_STRUCT( finfo );
4175 finfo.fsp_name = CONST_DISCARD(char *,fname);
4177 if (get_nt_acl( &finfo, DACL_SECURITY_INFORMATION, &psd ) == 0) {
4178 DEBUG(0,("get_nt_acl_no_snum: get_nt_acl returned zero.\n"));
4179 conn_free_internal( &conn );
4183 ret_sd = dup_sec_desc( ctx, psd );
4185 conn_free_internal( &conn );