2 Unix SMB/CIFS implementation.
3 SMB NT Security Descriptor / Unix permission conversion.
4 Copyright (C) Jeremy Allison 1994-2009.
5 Copyright (C) Andreas Gruenbacher 2002.
6 Copyright (C) Simo Sorce <idra@samba.org> 2009.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>.
24 extern struct current_user current_user;
25 extern const struct generic_mapping file_generic_mapping;
28 #define DBGC_CLASS DBGC_ACLS
30 /****************************************************************************
31 Data structures representing the internal ACE format.
32 ****************************************************************************/
34 enum ace_owner {UID_ACE, GID_ACE, WORLD_ACE};
35 enum ace_attribute {ALLOW_ACE, DENY_ACE}; /* Used for incoming NT ACLS. */
37 typedef union posix_id {
43 typedef struct canon_ace {
44 struct canon_ace *next, *prev;
46 mode_t perms; /* Only use S_I(R|W|X)USR mode bits here. */
48 enum ace_owner owner_type;
49 enum ace_attribute attr;
51 uint8_t ace_flags; /* From windows ACE entry. */
54 #define ALL_ACE_PERMS (S_IRUSR|S_IWUSR|S_IXUSR)
57 * EA format of user.SAMBA_PAI (Samba_Posix_Acl_Interitance)
58 * attribute on disk - version 1.
59 * All values are little endian.
61 * | 1 | 1 | 2 | 2 | ....
62 * +------+------+-------------+---------------------+-------------+--------------------+
63 * | vers | flag | num_entries | num_default_entries | ..entries.. | default_entries... |
64 * +------+------+-------------+---------------------+-------------+--------------------+
69 * +------+-------------------+
70 * | value| uid/gid or world |
72 * +------+-------------------+
74 * Version 2 format. Stores extra Windows metadata about an ACL.
76 * | 1 | 2 | 2 | 2 | ....
77 * +------+----------+-------------+---------------------+-------------+--------------------+
78 * | vers | ace | num_entries | num_default_entries | ..entries.. | default_entries... |
79 * | 2 | type | | | | |
80 * +------+----------+-------------+---------------------+-------------+--------------------+
85 * +------+------+-------------------+
86 * | ace | value| uid/gid or world |
87 * | flag | type | value |
88 * +------+-------------------+------+
92 #define PAI_VERSION_OFFSET 0
94 #define PAI_V1_FLAG_OFFSET 1
95 #define PAI_V1_NUM_ENTRIES_OFFSET 2
96 #define PAI_V1_NUM_DEFAULT_ENTRIES_OFFSET 4
97 #define PAI_V1_ENTRIES_BASE 6
98 #define PAI_V1_ACL_FLAG_PROTECTED 0x1
99 #define PAI_V1_ENTRY_LENGTH 5
101 #define PAI_V1_VERSION 1
103 #define PAI_V2_TYPE_OFFSET 1
104 #define PAI_V2_NUM_ENTRIES_OFFSET 3
105 #define PAI_V2_NUM_DEFAULT_ENTRIES_OFFSET 5
106 #define PAI_V2_ENTRIES_BASE 7
107 #define PAI_V2_ENTRY_LENGTH 6
109 #define PAI_V2_VERSION 2
112 * In memory format of user.SAMBA_PAI attribute.
116 struct pai_entry *next, *prev;
118 enum ace_owner owner_type;
124 unsigned int num_entries;
125 struct pai_entry *entry_list;
126 unsigned int num_def_entries;
127 struct pai_entry *def_entry_list;
130 /************************************************************************
131 Return a uint32 of the pai_entry principal.
132 ************************************************************************/
134 static uint32_t get_pai_entry_val(struct pai_entry *paie)
136 switch (paie->owner_type) {
138 DEBUG(10,("get_pai_entry_val: uid = %u\n", (unsigned int)paie->unix_ug.uid ));
139 return (uint32_t)paie->unix_ug.uid;
141 DEBUG(10,("get_pai_entry_val: gid = %u\n", (unsigned int)paie->unix_ug.gid ));
142 return (uint32_t)paie->unix_ug.gid;
145 DEBUG(10,("get_pai_entry_val: world ace\n"));
150 /************************************************************************
151 Return a uint32 of the entry principal.
152 ************************************************************************/
154 static uint32_t get_entry_val(canon_ace *ace_entry)
156 switch (ace_entry->owner_type) {
158 DEBUG(10,("get_entry_val: uid = %u\n", (unsigned int)ace_entry->unix_ug.uid ));
159 return (uint32_t)ace_entry->unix_ug.uid;
161 DEBUG(10,("get_entry_val: gid = %u\n", (unsigned int)ace_entry->unix_ug.gid ));
162 return (uint32_t)ace_entry->unix_ug.gid;
165 DEBUG(10,("get_entry_val: world ace\n"));
170 /************************************************************************
171 Create the on-disk format (always v2 now). Caller must free.
172 ************************************************************************/
174 static char *create_pai_buf_v2(canon_ace *file_ace_list,
175 canon_ace *dir_ace_list,
179 char *pai_buf = NULL;
180 canon_ace *ace_list = NULL;
181 char *entry_offset = NULL;
182 unsigned int num_entries = 0;
183 unsigned int num_def_entries = 0;
186 for (ace_list = file_ace_list; ace_list; ace_list = ace_list->next) {
190 for (ace_list = dir_ace_list; ace_list; ace_list = ace_list->next) {
194 DEBUG(10,("create_pai_buf_v2: num_entries = %u, num_def_entries = %u\n", num_entries, num_def_entries ));
196 *store_size = PAI_V2_ENTRIES_BASE +
197 ((num_entries + num_def_entries)*PAI_V2_ENTRY_LENGTH);
199 pai_buf = (char *)SMB_MALLOC(*store_size);
204 /* Set up the header. */
205 memset(pai_buf, '\0', PAI_V2_ENTRIES_BASE);
206 SCVAL(pai_buf,PAI_VERSION_OFFSET,PAI_V2_VERSION);
207 SSVAL(pai_buf,PAI_V2_TYPE_OFFSET, sd_type);
208 SSVAL(pai_buf,PAI_V2_NUM_ENTRIES_OFFSET,num_entries);
209 SSVAL(pai_buf,PAI_V2_NUM_DEFAULT_ENTRIES_OFFSET,num_def_entries);
211 DEBUG(10,("create_pai_buf_v2: sd_type = 0x%x\n",
212 (unsigned int)sd_type ));
214 entry_offset = pai_buf + PAI_V2_ENTRIES_BASE;
217 for (ace_list = file_ace_list; ace_list; ace_list = ace_list->next) {
218 uint8_t type_val = (uint8_t)ace_list->owner_type;
219 uint32_t entry_val = get_entry_val(ace_list);
221 SCVAL(entry_offset,0,ace_list->ace_flags);
222 SCVAL(entry_offset,1,type_val);
223 SIVAL(entry_offset,2,entry_val);
224 DEBUG(10,("create_pai_buf_v2: entry %u [0x%x] [0x%x] [0x%x]\n",
226 (unsigned int)ace_list->ace_flags,
227 (unsigned int)type_val,
228 (unsigned int)entry_val ));
230 entry_offset += PAI_V2_ENTRY_LENGTH;
233 for (ace_list = dir_ace_list; ace_list; ace_list = ace_list->next) {
234 uint8_t type_val = (uint8_t)ace_list->owner_type;
235 uint32_t entry_val = get_entry_val(ace_list);
237 SCVAL(entry_offset,0,ace_list->ace_flags);
238 SCVAL(entry_offset,1,type_val);
239 SIVAL(entry_offset,2,entry_val);
240 DEBUG(10,("create_pai_buf_v2: entry %u [0x%x] [0x%x] [0x%x]\n",
242 (unsigned int)ace_list->ace_flags,
243 (unsigned int)type_val,
244 (unsigned int)entry_val ));
246 entry_offset += PAI_V2_ENTRY_LENGTH;
252 /************************************************************************
253 Store the user.SAMBA_PAI attribute on disk.
254 ************************************************************************/
256 static void store_inheritance_attributes(files_struct *fsp,
257 canon_ace *file_ace_list,
258 canon_ace *dir_ace_list,
265 if (!lp_map_acl_inherit(SNUM(fsp->conn))) {
269 pai_buf = create_pai_buf_v2(file_ace_list, dir_ace_list,
270 sd_type, &store_size);
272 if (fsp->fh->fd != -1) {
273 ret = SMB_VFS_FSETXATTR(fsp, SAMBA_POSIX_INHERITANCE_EA_NAME,
274 pai_buf, store_size, 0);
276 ret = SMB_VFS_SETXATTR(fsp->conn, fsp->fsp_name->base_name,
277 SAMBA_POSIX_INHERITANCE_EA_NAME,
278 pai_buf, store_size, 0);
283 DEBUG(10,("store_inheritance_attribute: type 0x%x for file %s\n",
284 (unsigned int)sd_type,
287 if (ret == -1 && !no_acl_syscall_error(errno)) {
288 DEBUG(1,("store_inheritance_attribute: Error %s\n", strerror(errno) ));
292 /************************************************************************
293 Delete the in memory inheritance info.
294 ************************************************************************/
296 static void free_inherited_info(struct pai_val *pal)
299 struct pai_entry *paie, *paie_next;
300 for (paie = pal->entry_list; paie; paie = paie_next) {
301 paie_next = paie->next;
304 for (paie = pal->def_entry_list; paie; paie = paie_next) {
305 paie_next = paie->next;
312 /************************************************************************
313 Get any stored ACE flags.
314 ************************************************************************/
316 static uint16_t get_pai_flags(struct pai_val *pal, canon_ace *ace_entry, bool default_ace)
318 struct pai_entry *paie;
324 /* If the entry exists it is inherited. */
325 for (paie = (default_ace ? pal->def_entry_list : pal->entry_list); paie; paie = paie->next) {
326 if (ace_entry->owner_type == paie->owner_type &&
327 get_entry_val(ace_entry) == get_pai_entry_val(paie))
328 return paie->ace_flags;
333 /************************************************************************
334 Ensure an attribute just read is valid - v1.
335 ************************************************************************/
337 static bool check_pai_ok_v1(const char *pai_buf, size_t pai_buf_data_size)
340 uint16 num_def_entries;
342 if (pai_buf_data_size < PAI_V1_ENTRIES_BASE) {
343 /* Corrupted - too small. */
347 if (CVAL(pai_buf,PAI_VERSION_OFFSET) != PAI_V1_VERSION) {
351 num_entries = SVAL(pai_buf,PAI_V1_NUM_ENTRIES_OFFSET);
352 num_def_entries = SVAL(pai_buf,PAI_V1_NUM_DEFAULT_ENTRIES_OFFSET);
354 /* Check the entry lists match. */
355 /* Each entry is 5 bytes (type plus 4 bytes of uid or gid). */
357 if (((num_entries + num_def_entries)*PAI_V1_ENTRY_LENGTH) +
358 PAI_V1_ENTRIES_BASE != pai_buf_data_size) {
365 /************************************************************************
366 Ensure an attribute just read is valid - v2.
367 ************************************************************************/
369 static bool check_pai_ok_v2(const char *pai_buf, size_t pai_buf_data_size)
372 uint16 num_def_entries;
374 if (pai_buf_data_size < PAI_V2_ENTRIES_BASE) {
375 /* Corrupted - too small. */
379 if (CVAL(pai_buf,PAI_VERSION_OFFSET) != PAI_V2_VERSION) {
383 num_entries = SVAL(pai_buf,PAI_V2_NUM_ENTRIES_OFFSET);
384 num_def_entries = SVAL(pai_buf,PAI_V2_NUM_DEFAULT_ENTRIES_OFFSET);
386 /* Check the entry lists match. */
387 /* Each entry is 6 bytes (flags + type + 4 bytes of uid or gid). */
389 if (((num_entries + num_def_entries)*PAI_V2_ENTRY_LENGTH) +
390 PAI_V2_ENTRIES_BASE != pai_buf_data_size) {
397 /************************************************************************
399 ************************************************************************/
401 static bool get_pai_owner_type(struct pai_entry *paie, const char *entry_offset)
403 paie->owner_type = (enum ace_owner)CVAL(entry_offset,0);
404 switch( paie->owner_type) {
406 paie->unix_ug.uid = (uid_t)IVAL(entry_offset,1);
407 DEBUG(10,("get_pai_owner_type: uid = %u\n",
408 (unsigned int)paie->unix_ug.uid ));
411 paie->unix_ug.gid = (gid_t)IVAL(entry_offset,1);
412 DEBUG(10,("get_pai_owner_type: gid = %u\n",
413 (unsigned int)paie->unix_ug.gid ));
416 paie->unix_ug.world = -1;
417 DEBUG(10,("get_pai_owner_type: world ace\n"));
420 DEBUG(10,("get_pai_owner_type: unknown type %u\n",
421 (unsigned int)paie->owner_type ));
427 /************************************************************************
429 ************************************************************************/
431 static const char *create_pai_v1_entries(struct pai_val *paiv,
432 const char *entry_offset,
437 for (i = 0; i < paiv->num_entries; i++) {
438 struct pai_entry *paie = SMB_MALLOC_P(struct pai_entry);
443 paie->ace_flags = SEC_ACE_FLAG_INHERITED_ACE;
444 if (!get_pai_owner_type(paie, entry_offset)) {
449 DLIST_ADD(paiv->entry_list, paie);
451 DLIST_ADD(paiv->def_entry_list, paie);
453 entry_offset += PAI_V1_ENTRY_LENGTH;
458 /************************************************************************
459 Convert to in-memory format from version 1.
460 ************************************************************************/
462 static struct pai_val *create_pai_val_v1(const char *buf, size_t size)
464 const char *entry_offset;
465 struct pai_val *paiv = NULL;
467 if (!check_pai_ok_v1(buf, size)) {
471 paiv = SMB_MALLOC_P(struct pai_val);
476 memset(paiv, '\0', sizeof(struct pai_val));
478 paiv->sd_type = (CVAL(buf,PAI_V1_FLAG_OFFSET) == PAI_V1_ACL_FLAG_PROTECTED) ?
479 SE_DESC_DACL_PROTECTED : 0;
481 paiv->num_entries = SVAL(buf,PAI_V1_NUM_ENTRIES_OFFSET);
482 paiv->num_def_entries = SVAL(buf,PAI_V1_NUM_DEFAULT_ENTRIES_OFFSET);
484 entry_offset = buf + PAI_V1_ENTRIES_BASE;
486 DEBUG(10,("create_pai_val: num_entries = %u, num_def_entries = %u\n",
487 paiv->num_entries, paiv->num_def_entries ));
489 entry_offset = create_pai_v1_entries(paiv, entry_offset, false);
490 if (entry_offset == NULL) {
491 free_inherited_info(paiv);
494 entry_offset = create_pai_v1_entries(paiv, entry_offset, true);
495 if (entry_offset == NULL) {
496 free_inherited_info(paiv);
503 /************************************************************************
505 ************************************************************************/
507 static const char *create_pai_v2_entries(struct pai_val *paiv,
508 unsigned int num_entries,
509 const char *entry_offset,
514 for (i = 0; i < num_entries; i++) {
515 struct pai_entry *paie = SMB_MALLOC_P(struct pai_entry);
520 paie->ace_flags = CVAL(entry_offset,0);
522 if (!get_pai_owner_type(paie, entry_offset+1)) {
526 DLIST_ADD(paiv->entry_list, paie);
528 DLIST_ADD(paiv->def_entry_list, paie);
530 entry_offset += PAI_V2_ENTRY_LENGTH;
535 /************************************************************************
536 Convert to in-memory format from version 2.
537 ************************************************************************/
539 static struct pai_val *create_pai_val_v2(const char *buf, size_t size)
541 const char *entry_offset;
542 struct pai_val *paiv = NULL;
544 if (!check_pai_ok_v2(buf, size)) {
548 paiv = SMB_MALLOC_P(struct pai_val);
553 memset(paiv, '\0', sizeof(struct pai_val));
555 paiv->sd_type = SVAL(buf,PAI_V2_TYPE_OFFSET);
557 paiv->num_entries = SVAL(buf,PAI_V2_NUM_ENTRIES_OFFSET);
558 paiv->num_def_entries = SVAL(buf,PAI_V2_NUM_DEFAULT_ENTRIES_OFFSET);
560 entry_offset = buf + PAI_V2_ENTRIES_BASE;
562 DEBUG(10,("create_pai_val_v2: sd_type = 0x%x num_entries = %u, num_def_entries = %u\n",
563 (unsigned int)paiv->sd_type,
564 paiv->num_entries, paiv->num_def_entries ));
566 entry_offset = create_pai_v2_entries(paiv, paiv->num_entries,
567 entry_offset, false);
568 if (entry_offset == NULL) {
569 free_inherited_info(paiv);
572 entry_offset = create_pai_v2_entries(paiv, paiv->num_def_entries,
574 if (entry_offset == NULL) {
575 free_inherited_info(paiv);
582 /************************************************************************
583 Convert to in-memory format - from either version 1 or 2.
584 ************************************************************************/
586 static struct pai_val *create_pai_val(const char *buf, size_t size)
591 if (CVAL(buf,PAI_VERSION_OFFSET) == PAI_V1_VERSION) {
592 return create_pai_val_v1(buf, size);
593 } else if (CVAL(buf,PAI_VERSION_OFFSET) == PAI_V2_VERSION) {
594 return create_pai_val_v2(buf, size);
600 /************************************************************************
601 Load the user.SAMBA_PAI attribute.
602 ************************************************************************/
604 static struct pai_val *fload_inherited_info(files_struct *fsp)
607 size_t pai_buf_size = 1024;
608 struct pai_val *paiv = NULL;
611 if (!lp_map_acl_inherit(SNUM(fsp->conn))) {
615 if ((pai_buf = (char *)SMB_MALLOC(pai_buf_size)) == NULL) {
620 if (fsp->fh->fd != -1) {
621 ret = SMB_VFS_FGETXATTR(fsp, SAMBA_POSIX_INHERITANCE_EA_NAME,
622 pai_buf, pai_buf_size);
624 ret = SMB_VFS_GETXATTR(fsp->conn,
625 fsp->fsp_name->base_name,
626 SAMBA_POSIX_INHERITANCE_EA_NAME,
627 pai_buf, pai_buf_size);
631 if (errno != ERANGE) {
634 /* Buffer too small - enlarge it. */
637 if (pai_buf_size > 1024*1024) {
638 return NULL; /* Limit malloc to 1mb. */
640 if ((pai_buf = (char *)SMB_MALLOC(pai_buf_size)) == NULL)
645 DEBUG(10,("load_inherited_info: ret = %lu for file %s\n",
646 (unsigned long)ret, fsp_str_dbg(fsp)));
649 /* No attribute or not supported. */
651 if (errno != ENOATTR)
652 DEBUG(10,("load_inherited_info: Error %s\n", strerror(errno) ));
655 DEBUG(10,("load_inherited_info: Error %s\n", strerror(errno) ));
661 paiv = create_pai_val(pai_buf, ret);
664 DEBUG(10,("load_inherited_info: ACL type is 0x%x for file %s\n",
665 (unsigned int)paiv->sd_type, fsp_str_dbg(fsp)));
672 /************************************************************************
673 Load the user.SAMBA_PAI attribute.
674 ************************************************************************/
676 static struct pai_val *load_inherited_info(const struct connection_struct *conn,
680 size_t pai_buf_size = 1024;
681 struct pai_val *paiv = NULL;
684 if (!lp_map_acl_inherit(SNUM(conn))) {
688 if ((pai_buf = (char *)SMB_MALLOC(pai_buf_size)) == NULL) {
693 ret = SMB_VFS_GETXATTR(conn, fname,
694 SAMBA_POSIX_INHERITANCE_EA_NAME,
695 pai_buf, pai_buf_size);
698 if (errno != ERANGE) {
701 /* Buffer too small - enlarge it. */
704 if (pai_buf_size > 1024*1024) {
705 return NULL; /* Limit malloc to 1mb. */
707 if ((pai_buf = (char *)SMB_MALLOC(pai_buf_size)) == NULL)
712 DEBUG(10,("load_inherited_info: ret = %lu for file %s\n", (unsigned long)ret, fname));
715 /* No attribute or not supported. */
717 if (errno != ENOATTR)
718 DEBUG(10,("load_inherited_info: Error %s\n", strerror(errno) ));
721 DEBUG(10,("load_inherited_info: Error %s\n", strerror(errno) ));
727 paiv = create_pai_val(pai_buf, ret);
730 DEBUG(10,("load_inherited_info: ACL type 0x%x for file %s\n",
731 (unsigned int)paiv->sd_type,
739 /****************************************************************************
740 Functions to manipulate the internal ACE format.
741 ****************************************************************************/
743 /****************************************************************************
744 Count a linked list of canonical ACE entries.
745 ****************************************************************************/
747 static size_t count_canon_ace_list( canon_ace *l_head )
752 for (ace = l_head; ace; ace = ace->next)
758 /****************************************************************************
759 Free a linked list of canonical ACE entries.
760 ****************************************************************************/
762 static void free_canon_ace_list( canon_ace *l_head )
764 canon_ace *list, *next;
766 for (list = l_head; list; list = next) {
768 DLIST_REMOVE(l_head, list);
773 /****************************************************************************
774 Function to duplicate a canon_ace entry.
775 ****************************************************************************/
777 static canon_ace *dup_canon_ace( canon_ace *src_ace)
779 canon_ace *dst_ace = SMB_MALLOC_P(canon_ace);
785 dst_ace->prev = dst_ace->next = NULL;
789 /****************************************************************************
790 Print out a canon ace.
791 ****************************************************************************/
793 static void print_canon_ace(canon_ace *pace, int num)
795 dbgtext( "canon_ace index %d. Type = %s ", num, pace->attr == ALLOW_ACE ? "allow" : "deny" );
796 dbgtext( "SID = %s ", sid_string_dbg(&pace->trustee));
797 if (pace->owner_type == UID_ACE) {
798 const char *u_name = uidtoname(pace->unix_ug.uid);
799 dbgtext( "uid %u (%s) ", (unsigned int)pace->unix_ug.uid, u_name );
800 } else if (pace->owner_type == GID_ACE) {
801 char *g_name = gidtoname(pace->unix_ug.gid);
802 dbgtext( "gid %u (%s) ", (unsigned int)pace->unix_ug.gid, g_name );
805 switch (pace->type) {
807 dbgtext( "SMB_ACL_USER ");
809 case SMB_ACL_USER_OBJ:
810 dbgtext( "SMB_ACL_USER_OBJ ");
813 dbgtext( "SMB_ACL_GROUP ");
815 case SMB_ACL_GROUP_OBJ:
816 dbgtext( "SMB_ACL_GROUP_OBJ ");
819 dbgtext( "SMB_ACL_OTHER ");
826 dbgtext( "ace_flags = 0x%x ", (unsigned int)pace->ace_flags);
828 dbgtext( "%c", pace->perms & S_IRUSR ? 'r' : '-');
829 dbgtext( "%c", pace->perms & S_IWUSR ? 'w' : '-');
830 dbgtext( "%c\n", pace->perms & S_IXUSR ? 'x' : '-');
833 /****************************************************************************
834 Print out a canon ace list.
835 ****************************************************************************/
837 static void print_canon_ace_list(const char *name, canon_ace *ace_list)
841 if( DEBUGLVL( 10 )) {
842 dbgtext( "print_canon_ace_list: %s\n", name );
843 for (;ace_list; ace_list = ace_list->next, count++)
844 print_canon_ace(ace_list, count );
848 /****************************************************************************
849 Map POSIX ACL perms to canon_ace permissions (a mode_t containing only S_(R|W|X)USR bits).
850 ****************************************************************************/
852 static mode_t convert_permset_to_mode_t(connection_struct *conn, SMB_ACL_PERMSET_T permset)
856 ret |= (SMB_VFS_SYS_ACL_GET_PERM(conn, permset, SMB_ACL_READ) ? S_IRUSR : 0);
857 ret |= (SMB_VFS_SYS_ACL_GET_PERM(conn, permset, SMB_ACL_WRITE) ? S_IWUSR : 0);
858 ret |= (SMB_VFS_SYS_ACL_GET_PERM(conn, permset, SMB_ACL_EXECUTE) ? S_IXUSR : 0);
863 /****************************************************************************
864 Map generic UNIX permissions to canon_ace permissions (a mode_t containing only S_(R|W|X)USR bits).
865 ****************************************************************************/
867 static mode_t unix_perms_to_acl_perms(mode_t mode, int r_mask, int w_mask, int x_mask)
881 /****************************************************************************
882 Map canon_ace permissions (a mode_t containing only S_(R|W|X)USR bits) to
883 an SMB_ACL_PERMSET_T.
884 ****************************************************************************/
886 static int map_acl_perms_to_permset(connection_struct *conn, mode_t mode, SMB_ACL_PERMSET_T *p_permset)
888 if (SMB_VFS_SYS_ACL_CLEAR_PERMS(conn, *p_permset) == -1)
890 if (mode & S_IRUSR) {
891 if (SMB_VFS_SYS_ACL_ADD_PERM(conn, *p_permset, SMB_ACL_READ) == -1)
894 if (mode & S_IWUSR) {
895 if (SMB_VFS_SYS_ACL_ADD_PERM(conn, *p_permset, SMB_ACL_WRITE) == -1)
898 if (mode & S_IXUSR) {
899 if (SMB_VFS_SYS_ACL_ADD_PERM(conn, *p_permset, SMB_ACL_EXECUTE) == -1)
905 /****************************************************************************
906 Function to create owner and group SIDs from a SMB_STRUCT_STAT.
907 ****************************************************************************/
909 void create_file_sids(const SMB_STRUCT_STAT *psbuf, DOM_SID *powner_sid, DOM_SID *pgroup_sid)
911 uid_to_sid( powner_sid, psbuf->st_ex_uid );
912 gid_to_sid( pgroup_sid, psbuf->st_ex_gid );
915 /****************************************************************************
916 Merge aces with a common sid - if both are allow or deny, OR the permissions together and
917 delete the second one. If the first is deny, mask the permissions off and delete the allow
918 if the permissions become zero, delete the deny if the permissions are non zero.
919 ****************************************************************************/
921 static void merge_aces( canon_ace **pp_list_head, bool dir_acl)
923 canon_ace *l_head = *pp_list_head;
924 canon_ace *curr_ace_outer;
925 canon_ace *curr_ace_outer_next;
928 * First, merge allow entries with identical SIDs, and deny entries
929 * with identical SIDs.
932 for (curr_ace_outer = l_head; curr_ace_outer; curr_ace_outer = curr_ace_outer_next) {
934 canon_ace *curr_ace_next;
936 curr_ace_outer_next = curr_ace_outer->next; /* Save the link in case we delete. */
938 for (curr_ace = curr_ace_outer->next; curr_ace; curr_ace = curr_ace_next) {
939 bool can_merge = false;
941 curr_ace_next = curr_ace->next; /* Save the link in case of delete. */
943 /* For file ACLs we can merge if the SIDs and ALLOW/DENY
944 * types are the same. For directory acls we must also
945 * ensure the POSIX ACL types are the same. */
948 can_merge = (sid_equal(&curr_ace->trustee, &curr_ace_outer->trustee) &&
949 (curr_ace->attr == curr_ace_outer->attr));
951 can_merge = (sid_equal(&curr_ace->trustee, &curr_ace_outer->trustee) &&
952 (curr_ace->type == curr_ace_outer->type) &&
953 (curr_ace->attr == curr_ace_outer->attr));
957 if( DEBUGLVL( 10 )) {
958 dbgtext("merge_aces: Merging ACE's\n");
959 print_canon_ace( curr_ace_outer, 0);
960 print_canon_ace( curr_ace, 0);
963 /* Merge two allow or two deny ACE's. */
965 /* Theoretically we shouldn't merge a dir ACE if
966 * one ACE has the CI flag set, and the other
967 * ACE has the OI flag set, but this is rare
968 * enough we can ignore it. */
970 curr_ace_outer->perms |= curr_ace->perms;
971 curr_ace_outer->ace_flags |= curr_ace->ace_flags;
972 DLIST_REMOVE(l_head, curr_ace);
974 curr_ace_outer_next = curr_ace_outer->next; /* We may have deleted the link. */
980 * Now go through and mask off allow permissions with deny permissions.
981 * We can delete either the allow or deny here as we know that each SID
982 * appears only once in the list.
985 for (curr_ace_outer = l_head; curr_ace_outer; curr_ace_outer = curr_ace_outer_next) {
987 canon_ace *curr_ace_next;
989 curr_ace_outer_next = curr_ace_outer->next; /* Save the link in case we delete. */
991 for (curr_ace = curr_ace_outer->next; curr_ace; curr_ace = curr_ace_next) {
993 curr_ace_next = curr_ace->next; /* Save the link in case of delete. */
996 * Subtract ACE's with different entries. Due to the ordering constraints
997 * we've put on the ACL, we know the deny must be the first one.
1000 if (sid_equal(&curr_ace->trustee, &curr_ace_outer->trustee) &&
1001 (curr_ace_outer->attr == DENY_ACE) && (curr_ace->attr == ALLOW_ACE)) {
1003 if( DEBUGLVL( 10 )) {
1004 dbgtext("merge_aces: Masking ACE's\n");
1005 print_canon_ace( curr_ace_outer, 0);
1006 print_canon_ace( curr_ace, 0);
1009 curr_ace->perms &= ~curr_ace_outer->perms;
1011 if (curr_ace->perms == 0) {
1014 * The deny overrides the allow. Remove the allow.
1017 DLIST_REMOVE(l_head, curr_ace);
1018 SAFE_FREE(curr_ace);
1019 curr_ace_outer_next = curr_ace_outer->next; /* We may have deleted the link. */
1024 * Even after removing permissions, there
1025 * are still allow permissions - delete the deny.
1026 * It is safe to delete the deny here,
1027 * as we are guarenteed by the deny first
1028 * ordering that all the deny entries for
1029 * this SID have already been merged into one
1030 * before we can get to an allow ace.
1033 DLIST_REMOVE(l_head, curr_ace_outer);
1034 SAFE_FREE(curr_ace_outer);
1039 } /* end for curr_ace */
1040 } /* end for curr_ace_outer */
1042 /* We may have modified the list. */
1044 *pp_list_head = l_head;
1047 /****************************************************************************
1048 Check if we need to return NT4.x compatible ACL entries.
1049 ****************************************************************************/
1051 bool nt4_compatible_acls(void)
1053 int compat = lp_acl_compatibility();
1055 if (compat == ACL_COMPAT_AUTO) {
1056 enum remote_arch_types ra_type = get_remote_arch();
1058 /* Automatically adapt to client */
1059 return (ra_type <= RA_WINNT);
1061 return (compat == ACL_COMPAT_WINNT);
1065 /****************************************************************************
1066 Map canon_ace perms to permission bits NT.
1067 The attr element is not used here - we only process deny entries on set,
1068 not get. Deny entries are implicit on get with ace->perms = 0.
1069 ****************************************************************************/
1071 uint32_t map_canon_ace_perms(int snum,
1072 enum security_ace_type *pacl_type,
1076 uint32_t nt_mask = 0;
1078 *pacl_type = SEC_ACE_TYPE_ACCESS_ALLOWED;
1080 if (lp_acl_map_full_control(snum) && ((perms & ALL_ACE_PERMS) == ALL_ACE_PERMS)) {
1081 if (directory_ace) {
1082 nt_mask = UNIX_DIRECTORY_ACCESS_RWX;
1084 nt_mask = (UNIX_ACCESS_RWX & ~DELETE_ACCESS);
1086 } else if ((perms & ALL_ACE_PERMS) == (mode_t)0) {
1088 * Windows NT refuses to display ACEs with no permissions in them (but
1089 * they are perfectly legal with Windows 2000). If the ACE has empty
1090 * permissions we cannot use 0, so we use the otherwise unused
1091 * WRITE_OWNER permission, which we ignore when we set an ACL.
1092 * We abstract this into a #define of UNIX_ACCESS_NONE to allow this
1093 * to be changed in the future.
1096 if (nt4_compatible_acls())
1097 nt_mask = UNIX_ACCESS_NONE;
1101 if (directory_ace) {
1102 nt_mask |= ((perms & S_IRUSR) ? UNIX_DIRECTORY_ACCESS_R : 0 );
1103 nt_mask |= ((perms & S_IWUSR) ? UNIX_DIRECTORY_ACCESS_W : 0 );
1104 nt_mask |= ((perms & S_IXUSR) ? UNIX_DIRECTORY_ACCESS_X : 0 );
1106 nt_mask |= ((perms & S_IRUSR) ? UNIX_ACCESS_R : 0 );
1107 nt_mask |= ((perms & S_IWUSR) ? UNIX_ACCESS_W : 0 );
1108 nt_mask |= ((perms & S_IXUSR) ? UNIX_ACCESS_X : 0 );
1110 if ((perms & S_IWUSR) && lp_dos_filemode(snum)) {
1111 nt_mask |= (SEC_STD_WRITE_DAC|SEC_STD_WRITE_OWNER);
1115 DEBUG(10,("map_canon_ace_perms: Mapped (UNIX) %x to (NT) %x\n",
1116 (unsigned int)perms, (unsigned int)nt_mask ));
1121 /****************************************************************************
1122 Map NT perms to a UNIX mode_t.
1123 ****************************************************************************/
1125 #define FILE_SPECIFIC_READ_BITS (FILE_READ_DATA|FILE_READ_EA|FILE_READ_ATTRIBUTES)
1126 #define FILE_SPECIFIC_WRITE_BITS (FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_WRITE_EA|FILE_WRITE_ATTRIBUTES)
1127 #define FILE_SPECIFIC_EXECUTE_BITS (FILE_EXECUTE)
1129 static mode_t map_nt_perms( uint32 *mask, int type)
1135 if((*mask) & GENERIC_ALL_ACCESS)
1136 mode = S_IRUSR|S_IWUSR|S_IXUSR;
1138 mode |= ((*mask) & (GENERIC_READ_ACCESS|FILE_SPECIFIC_READ_BITS)) ? S_IRUSR : 0;
1139 mode |= ((*mask) & (GENERIC_WRITE_ACCESS|FILE_SPECIFIC_WRITE_BITS)) ? S_IWUSR : 0;
1140 mode |= ((*mask) & (GENERIC_EXECUTE_ACCESS|FILE_SPECIFIC_EXECUTE_BITS)) ? S_IXUSR : 0;
1144 if((*mask) & GENERIC_ALL_ACCESS)
1145 mode = S_IRGRP|S_IWGRP|S_IXGRP;
1147 mode |= ((*mask) & (GENERIC_READ_ACCESS|FILE_SPECIFIC_READ_BITS)) ? S_IRGRP : 0;
1148 mode |= ((*mask) & (GENERIC_WRITE_ACCESS|FILE_SPECIFIC_WRITE_BITS)) ? S_IWGRP : 0;
1149 mode |= ((*mask) & (GENERIC_EXECUTE_ACCESS|FILE_SPECIFIC_EXECUTE_BITS)) ? S_IXGRP : 0;
1153 if((*mask) & GENERIC_ALL_ACCESS)
1154 mode = S_IROTH|S_IWOTH|S_IXOTH;
1156 mode |= ((*mask) & (GENERIC_READ_ACCESS|FILE_SPECIFIC_READ_BITS)) ? S_IROTH : 0;
1157 mode |= ((*mask) & (GENERIC_WRITE_ACCESS|FILE_SPECIFIC_WRITE_BITS)) ? S_IWOTH : 0;
1158 mode |= ((*mask) & (GENERIC_EXECUTE_ACCESS|FILE_SPECIFIC_EXECUTE_BITS)) ? S_IXOTH : 0;
1166 /****************************************************************************
1167 Unpack a SEC_DESC into a UNIX owner and group.
1168 ****************************************************************************/
1170 NTSTATUS unpack_nt_owners(int snum, uid_t *puser, gid_t *pgrp, uint32 security_info_sent, const SEC_DESC *psd)
1178 if(security_info_sent == 0) {
1179 DEBUG(0,("unpack_nt_owners: no security info sent !\n"));
1180 return NT_STATUS_OK;
1184 * Validate the owner and group SID's.
1187 memset(&owner_sid, '\0', sizeof(owner_sid));
1188 memset(&grp_sid, '\0', sizeof(grp_sid));
1190 DEBUG(5,("unpack_nt_owners: validating owner_sids.\n"));
1193 * Don't immediately fail if the owner sid cannot be validated.
1194 * This may be a group chown only set.
1197 if (security_info_sent & OWNER_SECURITY_INFORMATION) {
1198 sid_copy(&owner_sid, psd->owner_sid);
1199 if (!sid_to_uid(&owner_sid, puser)) {
1200 if (lp_force_unknown_acl_user(snum)) {
1201 /* this allows take ownership to work
1203 *puser = current_user.ut.uid;
1205 DEBUG(3,("unpack_nt_owners: unable to validate"
1206 " owner sid for %s\n",
1207 sid_string_dbg(&owner_sid)));
1208 return NT_STATUS_INVALID_OWNER;
1211 DEBUG(3,("unpack_nt_owners: owner sid mapped to uid %u\n",
1212 (unsigned int)*puser ));
1216 * Don't immediately fail if the group sid cannot be validated.
1217 * This may be an owner chown only set.
1220 if (security_info_sent & GROUP_SECURITY_INFORMATION) {
1221 sid_copy(&grp_sid, psd->group_sid);
1222 if (!sid_to_gid( &grp_sid, pgrp)) {
1223 if (lp_force_unknown_acl_user(snum)) {
1224 /* this allows take group ownership to work
1226 *pgrp = current_user.ut.gid;
1228 DEBUG(3,("unpack_nt_owners: unable to validate"
1230 return NT_STATUS_INVALID_OWNER;
1233 DEBUG(3,("unpack_nt_owners: group sid mapped to gid %u\n",
1234 (unsigned int)*pgrp));
1237 DEBUG(5,("unpack_nt_owners: owner_sids validated.\n"));
1239 return NT_STATUS_OK;
1242 /****************************************************************************
1243 Ensure the enforced permissions for this share apply.
1244 ****************************************************************************/
1246 static void apply_default_perms(const struct share_params *params,
1247 const bool is_directory, canon_ace *pace,
1250 mode_t and_bits = (mode_t)0;
1251 mode_t or_bits = (mode_t)0;
1253 /* Get the initial bits to apply. */
1256 and_bits = lp_dir_security_mask(params->service);
1257 or_bits = lp_force_dir_security_mode(params->service);
1259 and_bits = lp_security_mask(params->service);
1260 or_bits = lp_force_security_mode(params->service);
1263 /* Now bounce them into the S_USR space. */
1266 /* Ensure owner has read access. */
1267 pace->perms |= S_IRUSR;
1269 pace->perms |= (S_IWUSR|S_IXUSR);
1270 and_bits = unix_perms_to_acl_perms(and_bits, S_IRUSR, S_IWUSR, S_IXUSR);
1271 or_bits = unix_perms_to_acl_perms(or_bits, S_IRUSR, S_IWUSR, S_IXUSR);
1274 and_bits = unix_perms_to_acl_perms(and_bits, S_IRGRP, S_IWGRP, S_IXGRP);
1275 or_bits = unix_perms_to_acl_perms(or_bits, S_IRGRP, S_IWGRP, S_IXGRP);
1278 and_bits = unix_perms_to_acl_perms(and_bits, S_IROTH, S_IWOTH, S_IXOTH);
1279 or_bits = unix_perms_to_acl_perms(or_bits, S_IROTH, S_IWOTH, S_IXOTH);
1283 pace->perms = ((pace->perms & and_bits)|or_bits);
1286 /****************************************************************************
1287 Check if a given uid/SID is in a group gid/SID. This is probably very
1288 expensive and will need optimisation. A *lot* of optimisation :-). JRA.
1289 ****************************************************************************/
1291 static bool uid_entry_in_group( canon_ace *uid_ace, canon_ace *group_ace )
1293 const char *u_name = NULL;
1295 /* "Everyone" always matches every uid. */
1297 if (sid_equal(&group_ace->trustee, &global_sid_World))
1301 * if it's the current user, we already have the unix token
1302 * and don't need to do the complex user_in_group_sid() call
1304 if (uid_ace->unix_ug.uid == current_user.ut.uid) {
1307 if (group_ace->unix_ug.gid == current_user.ut.gid) {
1311 for (i=0; i < current_user.ut.ngroups; i++) {
1312 if (group_ace->unix_ug.gid == current_user.ut.groups[i]) {
1318 /* u_name talloc'ed off tos. */
1319 u_name = uidtoname(uid_ace->unix_ug.uid);
1325 * user_in_group_sid() uses create_token_from_username()
1326 * which creates an artificial NT token given just a username,
1327 * so this is not reliable for users from foreign domains
1328 * exported by winbindd!
1330 return user_in_group_sid(u_name, &group_ace->trustee);
1333 /****************************************************************************
1334 A well formed POSIX file or default ACL has at least 3 entries, a
1335 SMB_ACL_USER_OBJ, SMB_ACL_GROUP_OBJ, SMB_ACL_OTHER_OBJ.
1336 In addition, the owner must always have at least read access.
1337 When using this call on get_acl, the pst struct is valid and contains
1338 the mode of the file. When using this call on set_acl, the pst struct has
1339 been modified to have a mode containing the default for this file or directory
1341 ****************************************************************************/
1343 static bool ensure_canon_entry_valid(canon_ace **pp_ace,
1344 const struct share_params *params,
1345 const bool is_directory,
1346 const DOM_SID *pfile_owner_sid,
1347 const DOM_SID *pfile_grp_sid,
1348 const SMB_STRUCT_STAT *pst,
1352 bool got_user = False;
1353 bool got_grp = False;
1354 bool got_other = False;
1355 canon_ace *pace_other = NULL;
1357 for (pace = *pp_ace; pace; pace = pace->next) {
1358 if (pace->type == SMB_ACL_USER_OBJ) {
1361 apply_default_perms(params, is_directory, pace, S_IRUSR);
1364 } else if (pace->type == SMB_ACL_GROUP_OBJ) {
1367 * Ensure create mask/force create mode is respected on set.
1371 apply_default_perms(params, is_directory, pace, S_IRGRP);
1374 } else if (pace->type == SMB_ACL_OTHER) {
1377 * Ensure create mask/force create mode is respected on set.
1381 apply_default_perms(params, is_directory, pace, S_IROTH);
1388 if ((pace = SMB_MALLOC_P(canon_ace)) == NULL) {
1389 DEBUG(0,("ensure_canon_entry_valid: malloc fail.\n"));
1394 pace->type = SMB_ACL_USER_OBJ;
1395 pace->owner_type = UID_ACE;
1396 pace->unix_ug.uid = pst->st_ex_uid;
1397 pace->trustee = *pfile_owner_sid;
1398 pace->attr = ALLOW_ACE;
1401 /* See if the owning user is in any of the other groups in
1402 the ACE. If so, OR in the permissions from that group. */
1404 bool group_matched = False;
1405 canon_ace *pace_iter;
1407 for (pace_iter = *pp_ace; pace_iter; pace_iter = pace_iter->next) {
1408 if (pace_iter->type == SMB_ACL_GROUP_OBJ || pace_iter->type == SMB_ACL_GROUP) {
1409 if (uid_entry_in_group(pace, pace_iter)) {
1410 pace->perms |= pace_iter->perms;
1411 group_matched = True;
1416 /* If we only got an "everyone" perm, just use that. */
1417 if (!group_matched) {
1419 pace->perms = pace_other->perms;
1424 apply_default_perms(params, is_directory, pace, S_IRUSR);
1426 pace->perms = unix_perms_to_acl_perms(pst->st_ex_mode, S_IRUSR, S_IWUSR, S_IXUSR);
1429 DLIST_ADD(*pp_ace, pace);
1433 if ((pace = SMB_MALLOC_P(canon_ace)) == NULL) {
1434 DEBUG(0,("ensure_canon_entry_valid: malloc fail.\n"));
1439 pace->type = SMB_ACL_GROUP_OBJ;
1440 pace->owner_type = GID_ACE;
1441 pace->unix_ug.uid = pst->st_ex_gid;
1442 pace->trustee = *pfile_grp_sid;
1443 pace->attr = ALLOW_ACE;
1445 /* If we only got an "everyone" perm, just use that. */
1447 pace->perms = pace_other->perms;
1450 apply_default_perms(params, is_directory, pace, S_IRGRP);
1452 pace->perms = unix_perms_to_acl_perms(pst->st_ex_mode, S_IRGRP, S_IWGRP, S_IXGRP);
1455 DLIST_ADD(*pp_ace, pace);
1459 if ((pace = SMB_MALLOC_P(canon_ace)) == NULL) {
1460 DEBUG(0,("ensure_canon_entry_valid: malloc fail.\n"));
1465 pace->type = SMB_ACL_OTHER;
1466 pace->owner_type = WORLD_ACE;
1467 pace->unix_ug.world = -1;
1468 pace->trustee = global_sid_World;
1469 pace->attr = ALLOW_ACE;
1472 apply_default_perms(params, is_directory, pace, S_IROTH);
1474 pace->perms = unix_perms_to_acl_perms(pst->st_ex_mode, S_IROTH, S_IWOTH, S_IXOTH);
1476 DLIST_ADD(*pp_ace, pace);
1482 /****************************************************************************
1483 Check if a POSIX ACL has the required SMB_ACL_USER_OBJ and SMB_ACL_GROUP_OBJ entries.
1484 If it does not have them, check if there are any entries where the trustee is the
1485 file owner or the owning group, and map these to SMB_ACL_USER_OBJ and SMB_ACL_GROUP_OBJ.
1486 ****************************************************************************/
1488 static void check_owning_objs(canon_ace *ace, DOM_SID *pfile_owner_sid, DOM_SID *pfile_grp_sid)
1490 bool got_user_obj, got_group_obj;
1491 canon_ace *current_ace;
1494 entries = count_canon_ace_list(ace);
1495 got_user_obj = False;
1496 got_group_obj = False;
1498 for (i=0, current_ace = ace; i < entries; i++, current_ace = current_ace->next) {
1499 if (current_ace->type == SMB_ACL_USER_OBJ)
1500 got_user_obj = True;
1501 else if (current_ace->type == SMB_ACL_GROUP_OBJ)
1502 got_group_obj = True;
1504 if (got_user_obj && got_group_obj) {
1505 DEBUG(10,("check_owning_objs: ACL had owning user/group entries.\n"));
1509 for (i=0, current_ace = ace; i < entries; i++, current_ace = current_ace->next) {
1510 if (!got_user_obj && current_ace->owner_type == UID_ACE &&
1511 sid_equal(¤t_ace->trustee, pfile_owner_sid)) {
1512 current_ace->type = SMB_ACL_USER_OBJ;
1513 got_user_obj = True;
1515 if (!got_group_obj && current_ace->owner_type == GID_ACE &&
1516 sid_equal(¤t_ace->trustee, pfile_grp_sid)) {
1517 current_ace->type = SMB_ACL_GROUP_OBJ;
1518 got_group_obj = True;
1522 DEBUG(10,("check_owning_objs: ACL is missing an owner entry.\n"));
1524 DEBUG(10,("check_owning_objs: ACL is missing an owning group entry.\n"));
1527 /****************************************************************************
1528 If an ACE entry is SMB_ACL_USER_OBJ and not CREATOR_OWNER, map to SMB_ACL_USER.
1529 If an ACE entry is SMB_ACL_GROUP_OBJ and not CREATOR_GROUP, map to SMB_ACL_GROUP
1530 ****************************************************************************/
1532 static bool dup_owning_ace(canon_ace *dir_ace, canon_ace *ace)
1534 /* dir ace must be followings.
1535 SMB_ACL_USER_OBJ : trustee(CREATOR_OWNER) -> Posix ACL d:u::perm
1536 SMB_ACL_USER : not trustee -> Posix ACL u:user:perm
1537 SMB_ACL_USER_OBJ : trustee -> convert to SMB_ACL_USER : trustee
1538 Posix ACL u:trustee:perm
1540 SMB_ACL_GROUP_OBJ: trustee(CREATOR_GROUP) -> Posix ACL d:g::perm
1541 SMB_ACL_GROUP : not trustee -> Posix ACL g:group:perm
1542 SMB_ACL_GROUP_OBJ: trustee -> convert to SMB_ACL_GROUP : trustee
1543 Posix ACL g:trustee:perm
1546 if (ace->type == SMB_ACL_USER_OBJ &&
1547 !(sid_equal(&ace->trustee, &global_sid_Creator_Owner))) {
1548 canon_ace *dup_ace = dup_canon_ace(ace);
1550 if (dup_ace == NULL) {
1553 dup_ace->type = SMB_ACL_USER;
1554 DLIST_ADD_END(dir_ace, dup_ace, canon_ace *);
1557 if (ace->type == SMB_ACL_GROUP_OBJ &&
1558 !(sid_equal(&ace->trustee, &global_sid_Creator_Group))) {
1559 canon_ace *dup_ace = dup_canon_ace(ace);
1561 if (dup_ace == NULL) {
1564 dup_ace->type = SMB_ACL_GROUP;
1565 DLIST_ADD_END(dir_ace, dup_ace, canon_ace *);
1571 /****************************************************************************
1572 Unpack a SEC_DESC into two canonical ace lists.
1573 ****************************************************************************/
1575 static bool create_canon_ace_lists(files_struct *fsp,
1576 const SMB_STRUCT_STAT *pst,
1577 DOM_SID *pfile_owner_sid,
1578 DOM_SID *pfile_grp_sid,
1579 canon_ace **ppfile_ace,
1580 canon_ace **ppdir_ace,
1581 const SEC_ACL *dacl)
1583 bool all_aces_are_inherit_only = (fsp->is_directory ? True : False);
1584 canon_ace *file_ace = NULL;
1585 canon_ace *dir_ace = NULL;
1586 canon_ace *current_ace = NULL;
1587 bool got_dir_allow = False;
1588 bool got_file_allow = False;
1595 * Convert the incoming ACL into a more regular form.
1598 for(i = 0; i < dacl->num_aces; i++) {
1599 SEC_ACE *psa = &dacl->aces[i];
1601 if((psa->type != SEC_ACE_TYPE_ACCESS_ALLOWED) && (psa->type != SEC_ACE_TYPE_ACCESS_DENIED)) {
1602 DEBUG(3,("create_canon_ace_lists: unable to set anything but an ALLOW or DENY ACE.\n"));
1606 if (nt4_compatible_acls()) {
1608 * The security mask may be UNIX_ACCESS_NONE which should map into
1609 * no permissions (we overload the WRITE_OWNER bit for this) or it
1610 * should be one of the ALL/EXECUTE/READ/WRITE bits. Arrange for this
1611 * to be so. Any other bits override the UNIX_ACCESS_NONE bit.
1615 * Convert GENERIC bits to specific bits.
1618 se_map_generic(&psa->access_mask, &file_generic_mapping);
1620 psa->access_mask &= (UNIX_ACCESS_NONE|FILE_ALL_ACCESS);
1622 if(psa->access_mask != UNIX_ACCESS_NONE)
1623 psa->access_mask &= ~UNIX_ACCESS_NONE;
1628 * Deal with the fact that NT 4.x re-writes the canonical format
1629 * that we return for default ACLs. If a directory ACE is identical
1630 * to a inherited directory ACE then NT changes the bits so that the
1631 * first ACE is set to OI|IO and the second ACE for this SID is set
1632 * to CI. We need to repair this. JRA.
1635 for(i = 0; i < dacl->num_aces; i++) {
1636 SEC_ACE *psa1 = &dacl->aces[i];
1638 for (j = i + 1; j < dacl->num_aces; j++) {
1639 SEC_ACE *psa2 = &dacl->aces[j];
1641 if (psa1->access_mask != psa2->access_mask)
1644 if (!sid_equal(&psa1->trustee, &psa2->trustee))
1648 * Ok - permission bits and SIDs are equal.
1649 * Check if flags were re-written.
1652 if (psa1->flags & SEC_ACE_FLAG_INHERIT_ONLY) {
1654 psa1->flags |= (psa2->flags & (SEC_ACE_FLAG_CONTAINER_INHERIT|SEC_ACE_FLAG_OBJECT_INHERIT));
1655 psa2->flags &= ~(SEC_ACE_FLAG_CONTAINER_INHERIT|SEC_ACE_FLAG_OBJECT_INHERIT);
1657 } else if (psa2->flags & SEC_ACE_FLAG_INHERIT_ONLY) {
1659 psa2->flags |= (psa1->flags & (SEC_ACE_FLAG_CONTAINER_INHERIT|SEC_ACE_FLAG_OBJECT_INHERIT));
1660 psa1->flags &= ~(SEC_ACE_FLAG_CONTAINER_INHERIT|SEC_ACE_FLAG_OBJECT_INHERIT);
1666 for(i = 0; i < dacl->num_aces; i++) {
1667 SEC_ACE *psa = &dacl->aces[i];
1670 * Create a cannon_ace entry representing this NT DACL ACE.
1673 if ((current_ace = SMB_MALLOC_P(canon_ace)) == NULL) {
1674 free_canon_ace_list(file_ace);
1675 free_canon_ace_list(dir_ace);
1676 DEBUG(0,("create_canon_ace_lists: malloc fail.\n"));
1680 ZERO_STRUCTP(current_ace);
1682 sid_copy(¤t_ace->trustee, &psa->trustee);
1685 * Try and work out if the SID is a user or group
1686 * as we need to flag these differently for POSIX.
1687 * Note what kind of a POSIX ACL this should map to.
1690 if( sid_equal(¤t_ace->trustee, &global_sid_World)) {
1691 current_ace->owner_type = WORLD_ACE;
1692 current_ace->unix_ug.world = -1;
1693 current_ace->type = SMB_ACL_OTHER;
1694 } else if (sid_equal(¤t_ace->trustee, &global_sid_Creator_Owner)) {
1695 current_ace->owner_type = UID_ACE;
1696 current_ace->unix_ug.uid = pst->st_ex_uid;
1697 current_ace->type = SMB_ACL_USER_OBJ;
1700 * The Creator Owner entry only specifies inheritable permissions,
1701 * never access permissions. WinNT doesn't always set the ACE to
1702 * INHERIT_ONLY, though.
1705 psa->flags |= SEC_ACE_FLAG_INHERIT_ONLY;
1707 } else if (sid_equal(¤t_ace->trustee, &global_sid_Creator_Group)) {
1708 current_ace->owner_type = GID_ACE;
1709 current_ace->unix_ug.gid = pst->st_ex_gid;
1710 current_ace->type = SMB_ACL_GROUP_OBJ;
1713 * The Creator Group entry only specifies inheritable permissions,
1714 * never access permissions. WinNT doesn't always set the ACE to
1715 * INHERIT_ONLY, though.
1717 psa->flags |= SEC_ACE_FLAG_INHERIT_ONLY;
1719 } else if (sid_to_uid( ¤t_ace->trustee, ¤t_ace->unix_ug.uid)) {
1720 current_ace->owner_type = UID_ACE;
1721 /* If it's the owning user, this is a user_obj, not
1723 if (current_ace->unix_ug.uid == pst->st_ex_uid) {
1724 current_ace->type = SMB_ACL_USER_OBJ;
1726 current_ace->type = SMB_ACL_USER;
1728 } else if (sid_to_gid( ¤t_ace->trustee, ¤t_ace->unix_ug.gid)) {
1729 current_ace->owner_type = GID_ACE;
1730 /* If it's the primary group, this is a group_obj, not
1732 if (current_ace->unix_ug.gid == pst->st_ex_gid) {
1733 current_ace->type = SMB_ACL_GROUP_OBJ;
1735 current_ace->type = SMB_ACL_GROUP;
1739 * Silently ignore map failures in non-mappable SIDs (NT Authority, BUILTIN etc).
1742 if (non_mappable_sid(&psa->trustee)) {
1743 DEBUG(10, ("create_canon_ace_lists: ignoring "
1744 "non-mappable SID %s\n",
1745 sid_string_dbg(&psa->trustee)));
1746 SAFE_FREE(current_ace);
1750 free_canon_ace_list(file_ace);
1751 free_canon_ace_list(dir_ace);
1752 DEBUG(0, ("create_canon_ace_lists: unable to map SID "
1753 "%s to uid or gid.\n",
1754 sid_string_dbg(¤t_ace->trustee)));
1755 SAFE_FREE(current_ace);
1760 * Map the given NT permissions into a UNIX mode_t containing only
1761 * S_I(R|W|X)USR bits.
1764 current_ace->perms |= map_nt_perms( &psa->access_mask, S_IRUSR);
1765 current_ace->attr = (psa->type == SEC_ACE_TYPE_ACCESS_ALLOWED) ? ALLOW_ACE : DENY_ACE;
1767 /* Store the ace_flag. */
1768 current_ace->ace_flags = psa->flags;
1771 * Now add the created ace to either the file list, the directory
1772 * list, or both. We *MUST* preserve the order here (hence we use
1773 * DLIST_ADD_END) as NT ACLs are order dependent.
1776 if (fsp->is_directory) {
1779 * We can only add to the default POSIX ACE list if the ACE is
1780 * designed to be inherited by both files and directories.
1783 if ((psa->flags & (SEC_ACE_FLAG_OBJECT_INHERIT|SEC_ACE_FLAG_CONTAINER_INHERIT)) ==
1784 (SEC_ACE_FLAG_OBJECT_INHERIT|SEC_ACE_FLAG_CONTAINER_INHERIT)) {
1786 DLIST_ADD_END(dir_ace, current_ace, canon_ace *);
1789 * Note if this was an allow ace. We can't process
1790 * any further deny ace's after this.
1793 if (current_ace->attr == ALLOW_ACE)
1794 got_dir_allow = True;
1796 if ((current_ace->attr == DENY_ACE) && got_dir_allow) {
1797 DEBUG(0,("create_canon_ace_lists: "
1799 "inheritable ACL! Deny entry "
1800 "after Allow entry. Failing "
1801 "to set on file %s.\n",
1803 free_canon_ace_list(file_ace);
1804 free_canon_ace_list(dir_ace);
1808 if( DEBUGLVL( 10 )) {
1809 dbgtext("create_canon_ace_lists: adding dir ACL:\n");
1810 print_canon_ace( current_ace, 0);
1814 * We have a lossy mapping: directory ACE entries
1815 * CREATOR_OWNER ------\
1816 * (map to) +---> SMB_ACL_USER_OBJ
1817 * owning sid ------/
1819 * CREATOR_GROUP ------\
1820 * (map to) +---> SMB_ACL_GROUP_OBJ
1821 * primary group sid --/
1823 * on set. And on read of a directory ACL
1825 * SMB_ACL_USER_OBJ ----> CREATOR_OWNER
1826 * SMB_ACL_GROUP_OBJ ---> CREATOR_GROUP.
1828 * Deal with this on set by duplicating
1829 * owning sid and primary group sid ACE
1830 * entries into the directory ACL.
1831 * Fix from Tsukasa Hamano <hamano@osstech.co.jp>.
1834 if (!dup_owning_ace(dir_ace, current_ace)) {
1835 DEBUG(0,("create_canon_ace_lists: malloc fail !\n"));
1836 free_canon_ace_list(file_ace);
1837 free_canon_ace_list(dir_ace);
1842 * If this is not an inherit only ACE we need to add a duplicate
1846 if (!(psa->flags & SEC_ACE_FLAG_INHERIT_ONLY)) {
1847 canon_ace *dup_ace = dup_canon_ace(current_ace);
1850 DEBUG(0,("create_canon_ace_lists: malloc fail !\n"));
1851 free_canon_ace_list(file_ace);
1852 free_canon_ace_list(dir_ace);
1857 * We must not free current_ace here as its
1858 * pointer is now owned by the dir_ace list.
1860 current_ace = dup_ace;
1861 /* We've essentially split this ace into two,
1862 * and added the ace with inheritance request
1863 * bits to the directory ACL. Drop those bits for
1864 * the ACE we're adding to the file list. */
1865 current_ace->ace_flags &= ~(SEC_ACE_FLAG_OBJECT_INHERIT|
1866 SEC_ACE_FLAG_CONTAINER_INHERIT|
1867 SEC_ACE_FLAG_INHERIT_ONLY);
1870 * We must not free current_ace here as its
1871 * pointer is now owned by the dir_ace list.
1879 * Only add to the file ACL if not inherit only.
1882 if (current_ace && !(psa->flags & SEC_ACE_FLAG_INHERIT_ONLY)) {
1883 DLIST_ADD_END(file_ace, current_ace, canon_ace *);
1886 * Note if this was an allow ace. We can't process
1887 * any further deny ace's after this.
1890 if (current_ace->attr == ALLOW_ACE)
1891 got_file_allow = True;
1893 if ((current_ace->attr == DENY_ACE) && got_file_allow) {
1894 DEBUG(0,("create_canon_ace_lists: malformed "
1895 "ACL in file ACL ! Deny entry after "
1896 "Allow entry. Failing to set on file "
1897 "%s.\n", fsp_str_dbg(fsp)));
1898 free_canon_ace_list(file_ace);
1899 free_canon_ace_list(dir_ace);
1903 if( DEBUGLVL( 10 )) {
1904 dbgtext("create_canon_ace_lists: adding file ACL:\n");
1905 print_canon_ace( current_ace, 0);
1907 all_aces_are_inherit_only = False;
1909 * We must not free current_ace here as its
1910 * pointer is now owned by the file_ace list.
1916 * Free if ACE was not added.
1919 SAFE_FREE(current_ace);
1922 if (fsp->is_directory && all_aces_are_inherit_only) {
1924 * Windows 2000 is doing one of these weird 'inherit acl'
1925 * traverses to conserve NTFS ACL resources. Just pretend
1926 * there was no DACL sent. JRA.
1929 DEBUG(10,("create_canon_ace_lists: Win2k inherit acl traverse. Ignoring DACL.\n"));
1930 free_canon_ace_list(file_ace);
1931 free_canon_ace_list(dir_ace);
1936 * Check if we have SMB_ACL_USER_OBJ and SMB_ACL_GROUP_OBJ entries in each
1937 * ACL. If we don't have them, check if any SMB_ACL_USER/SMB_ACL_GROUP
1938 * entries can be converted to *_OBJ. Usually we will already have these
1939 * entries in the Default ACL, and the Access ACL will not have them.
1942 check_owning_objs(file_ace, pfile_owner_sid, pfile_grp_sid);
1945 check_owning_objs(dir_ace, pfile_owner_sid, pfile_grp_sid);
1949 *ppfile_ace = file_ace;
1950 *ppdir_ace = dir_ace;
1955 /****************************************************************************
1956 ASCII art time again... JRA :-).
1958 We have 4 cases to process when moving from an NT ACL to a POSIX ACL. Firstly,
1959 we insist the ACL is in canonical form (ie. all DENY entries preceede ALLOW
1960 entries). Secondly, the merge code has ensured that all duplicate SID entries for
1961 allow or deny have been merged, so the same SID can only appear once in the deny
1962 list or once in the allow list.
1964 We then process as follows :
1966 ---------------------------------------------------------------------------
1967 First pass - look for a Everyone DENY entry.
1969 If it is deny all (rwx) trunate the list at this point.
1970 Else, walk the list from this point and use the deny permissions of this
1971 entry as a mask on all following allow entries. Finally, delete
1972 the Everyone DENY entry (we have applied it to everything possible).
1974 In addition, in this pass we remove any DENY entries that have
1975 no permissions (ie. they are a DENY nothing).
1976 ---------------------------------------------------------------------------
1977 Second pass - only deal with deny user entries.
1979 DENY user1 (perms XXX)
1982 for all following allow group entries where user1 is in group
1983 new_perms |= group_perms;
1985 user1 entry perms = new_perms & ~ XXX;
1987 Convert the deny entry to an allow entry with the new perms and
1988 push to the end of the list. Note if the user was in no groups
1989 this maps to a specific allow nothing entry for this user.
1991 The common case from the NT ACL choser (userX deny all) is
1992 optimised so we don't do the group lookup - we just map to
1993 an allow nothing entry.
1995 What we're doing here is inferring the allow permissions the
1996 person setting the ACE on user1 wanted by looking at the allow
1997 permissions on the groups the user is currently in. This will
1998 be a snapshot, depending on group membership but is the best
1999 we can do and has the advantage of failing closed rather than
2001 ---------------------------------------------------------------------------
2002 Third pass - only deal with deny group entries.
2004 DENY group1 (perms XXX)
2006 for all following allow user entries where user is in group1
2007 user entry perms = user entry perms & ~ XXX;
2009 If there is a group Everyone allow entry with permissions YYY,
2010 convert the group1 entry to an allow entry and modify its
2013 new_perms = YYY & ~ XXX
2015 and push to the end of the list.
2017 If there is no group Everyone allow entry then convert the
2018 group1 entry to a allow nothing entry and push to the end of the list.
2020 Note that the common case from the NT ACL choser (groupX deny all)
2021 cannot be optimised here as we need to modify user entries who are
2022 in the group to change them to a deny all also.
2024 What we're doing here is modifying the allow permissions of
2025 user entries (which are more specific in POSIX ACLs) to mask
2026 out the explicit deny set on the group they are in. This will
2027 be a snapshot depending on current group membership but is the
2028 best we can do and has the advantage of failing closed rather
2030 ---------------------------------------------------------------------------
2031 Fourth pass - cope with cumulative permissions.
2033 for all allow user entries, if there exists an allow group entry with
2034 more permissive permissions, and the user is in that group, rewrite the
2035 allow user permissions to contain both sets of permissions.
2037 Currently the code for this is #ifdef'ed out as these semantics make
2038 no sense to me. JRA.
2039 ---------------------------------------------------------------------------
2041 Note we *MUST* do the deny user pass first as this will convert deny user
2042 entries into allow user entries which can then be processed by the deny
2045 The above algorithm took a *lot* of thinking about - hence this
2046 explaination :-). JRA.
2047 ****************************************************************************/
2049 /****************************************************************************
2050 Process a canon_ace list entries. This is very complex code. We need
2051 to go through and remove the "deny" permissions from any allow entry that matches
2052 the id of this entry. We have already refused any NT ACL that wasn't in correct
2053 order (DENY followed by ALLOW). If any allow entry ends up with zero permissions,
2054 we just remove it (to fail safe). We have already removed any duplicate ace
2055 entries. Treat an "Everyone" DENY_ACE as a special case - use it to mask all
2057 ****************************************************************************/
2059 static void process_deny_list( canon_ace **pp_ace_list )
2061 canon_ace *ace_list = *pp_ace_list;
2062 canon_ace *curr_ace = NULL;
2063 canon_ace *curr_ace_next = NULL;
2065 /* Pass 1 above - look for an Everyone, deny entry. */
2067 for (curr_ace = ace_list; curr_ace; curr_ace = curr_ace_next) {
2068 canon_ace *allow_ace_p;
2070 curr_ace_next = curr_ace->next; /* So we can't lose the link. */
2072 if (curr_ace->attr != DENY_ACE)
2075 if (curr_ace->perms == (mode_t)0) {
2077 /* Deny nothing entry - delete. */
2079 DLIST_REMOVE(ace_list, curr_ace);
2083 if (!sid_equal(&curr_ace->trustee, &global_sid_World))
2086 /* JRATEST - assert. */
2087 SMB_ASSERT(curr_ace->owner_type == WORLD_ACE);
2089 if (curr_ace->perms == ALL_ACE_PERMS) {
2092 * Optimisation. This is a DENY_ALL to Everyone. Truncate the
2093 * list at this point including this entry.
2096 canon_ace *prev_entry = curr_ace->prev;
2098 free_canon_ace_list( curr_ace );
2100 prev_entry->next = NULL;
2102 /* We deleted the entire list. */
2108 for (allow_ace_p = curr_ace->next; allow_ace_p; allow_ace_p = allow_ace_p->next) {
2111 * Only mask off allow entries.
2114 if (allow_ace_p->attr != ALLOW_ACE)
2117 allow_ace_p->perms &= ~curr_ace->perms;
2121 * Now it's been applied, remove it.
2124 DLIST_REMOVE(ace_list, curr_ace);
2127 /* Pass 2 above - deal with deny user entries. */
2129 for (curr_ace = ace_list; curr_ace; curr_ace = curr_ace_next) {
2130 mode_t new_perms = (mode_t)0;
2131 canon_ace *allow_ace_p;
2133 curr_ace_next = curr_ace->next; /* So we can't lose the link. */
2135 if (curr_ace->attr != DENY_ACE)
2138 if (curr_ace->owner_type != UID_ACE)
2141 if (curr_ace->perms == ALL_ACE_PERMS) {
2144 * Optimisation - this is a deny everything to this user.
2145 * Convert to an allow nothing and push to the end of the list.
2148 curr_ace->attr = ALLOW_ACE;
2149 curr_ace->perms = (mode_t)0;
2150 DLIST_DEMOTE(ace_list, curr_ace, canon_ace *);
2154 for (allow_ace_p = curr_ace->next; allow_ace_p; allow_ace_p = allow_ace_p->next) {
2156 if (allow_ace_p->attr != ALLOW_ACE)
2159 /* We process GID_ACE and WORLD_ACE entries only. */
2161 if (allow_ace_p->owner_type == UID_ACE)
2164 if (uid_entry_in_group( curr_ace, allow_ace_p))
2165 new_perms |= allow_ace_p->perms;
2169 * Convert to a allow entry, modify the perms and push to the end
2173 curr_ace->attr = ALLOW_ACE;
2174 curr_ace->perms = (new_perms & ~curr_ace->perms);
2175 DLIST_DEMOTE(ace_list, curr_ace, canon_ace *);
2178 /* Pass 3 above - deal with deny group entries. */
2180 for (curr_ace = ace_list; curr_ace; curr_ace = curr_ace_next) {
2181 canon_ace *allow_ace_p;
2182 canon_ace *allow_everyone_p = NULL;
2184 curr_ace_next = curr_ace->next; /* So we can't lose the link. */
2186 if (curr_ace->attr != DENY_ACE)
2189 if (curr_ace->owner_type != GID_ACE)
2192 for (allow_ace_p = curr_ace->next; allow_ace_p; allow_ace_p = allow_ace_p->next) {
2194 if (allow_ace_p->attr != ALLOW_ACE)
2197 /* Store a pointer to the Everyone allow, if it exists. */
2198 if (allow_ace_p->owner_type == WORLD_ACE)
2199 allow_everyone_p = allow_ace_p;
2201 /* We process UID_ACE entries only. */
2203 if (allow_ace_p->owner_type != UID_ACE)
2206 /* Mask off the deny group perms. */
2208 if (uid_entry_in_group( allow_ace_p, curr_ace))
2209 allow_ace_p->perms &= ~curr_ace->perms;
2213 * Convert the deny to an allow with the correct perms and
2214 * push to the end of the list.
2217 curr_ace->attr = ALLOW_ACE;
2218 if (allow_everyone_p)
2219 curr_ace->perms = allow_everyone_p->perms & ~curr_ace->perms;
2221 curr_ace->perms = (mode_t)0;
2222 DLIST_DEMOTE(ace_list, curr_ace, canon_ace *);
2225 /* Doing this fourth pass allows Windows semantics to be layered
2226 * on top of POSIX semantics. I'm not sure if this is desirable.
2227 * For example, in W2K ACLs there is no way to say, "Group X no
2228 * access, user Y full access" if user Y is a member of group X.
2229 * This seems completely broken semantics to me.... JRA.
2233 /* Pass 4 above - deal with allow entries. */
2235 for (curr_ace = ace_list; curr_ace; curr_ace = curr_ace_next) {
2236 canon_ace *allow_ace_p;
2238 curr_ace_next = curr_ace->next; /* So we can't lose the link. */
2240 if (curr_ace->attr != ALLOW_ACE)
2243 if (curr_ace->owner_type != UID_ACE)
2246 for (allow_ace_p = ace_list; allow_ace_p; allow_ace_p = allow_ace_p->next) {
2248 if (allow_ace_p->attr != ALLOW_ACE)
2251 /* We process GID_ACE entries only. */
2253 if (allow_ace_p->owner_type != GID_ACE)
2256 /* OR in the group perms. */
2258 if (uid_entry_in_group( curr_ace, allow_ace_p))
2259 curr_ace->perms |= allow_ace_p->perms;
2264 *pp_ace_list = ace_list;
2267 /****************************************************************************
2268 Create a default mode that will be used if a security descriptor entry has
2269 no user/group/world entries.
2270 ****************************************************************************/
2272 static mode_t create_default_mode(files_struct *fsp, bool interitable_mode)
2274 int snum = SNUM(fsp->conn);
2275 mode_t and_bits = (mode_t)0;
2276 mode_t or_bits = (mode_t)0;
2279 if (interitable_mode) {
2280 mode = unix_mode(fsp->conn, FILE_ATTRIBUTE_ARCHIVE,
2281 fsp->fsp_name, NULL);
2286 if (fsp->is_directory)
2287 mode |= (S_IWUSR|S_IXUSR);
2290 * Now AND with the create mode/directory mode bits then OR with the
2291 * force create mode/force directory mode bits.
2294 if (fsp->is_directory) {
2295 and_bits = lp_dir_security_mask(snum);
2296 or_bits = lp_force_dir_security_mode(snum);
2298 and_bits = lp_security_mask(snum);
2299 or_bits = lp_force_security_mode(snum);
2302 return ((mode & and_bits)|or_bits);
2305 /****************************************************************************
2306 Unpack a SEC_DESC into two canonical ace lists. We don't depend on this
2308 ****************************************************************************/
2310 static bool unpack_canon_ace(files_struct *fsp,
2311 const SMB_STRUCT_STAT *pst,
2312 DOM_SID *pfile_owner_sid,
2313 DOM_SID *pfile_grp_sid,
2314 canon_ace **ppfile_ace,
2315 canon_ace **ppdir_ace,
2316 uint32 security_info_sent,
2317 const SEC_DESC *psd)
2320 canon_ace *file_ace = NULL;
2321 canon_ace *dir_ace = NULL;
2326 if(security_info_sent == 0) {
2327 DEBUG(0,("unpack_canon_ace: no security info sent !\n"));
2332 * If no DACL then this is a chown only security descriptor.
2335 if(!(security_info_sent & DACL_SECURITY_INFORMATION) || !psd->dacl)
2339 * Now go through the DACL and create the canon_ace lists.
2342 if (!create_canon_ace_lists( fsp, pst, pfile_owner_sid, pfile_grp_sid,
2343 &file_ace, &dir_ace, psd->dacl))
2346 if ((file_ace == NULL) && (dir_ace == NULL)) {
2347 /* W2K traverse DACL set - ignore. */
2352 * Go through the canon_ace list and merge entries
2353 * belonging to identical users of identical allow or deny type.
2354 * We can do this as all deny entries come first, followed by
2355 * all allow entries (we have mandated this before accepting this acl).
2358 print_canon_ace_list( "file ace - before merge", file_ace);
2359 merge_aces( &file_ace, false);
2361 print_canon_ace_list( "dir ace - before merge", dir_ace);
2362 merge_aces( &dir_ace, true);
2365 * NT ACLs are order dependent. Go through the acl lists and
2366 * process DENY entries by masking the allow entries.
2369 print_canon_ace_list( "file ace - before deny", file_ace);
2370 process_deny_list( &file_ace);
2372 print_canon_ace_list( "dir ace - before deny", dir_ace);
2373 process_deny_list( &dir_ace);
2376 * A well formed POSIX file or default ACL has at least 3 entries, a
2377 * SMB_ACL_USER_OBJ, SMB_ACL_GROUP_OBJ, SMB_ACL_OTHER_OBJ
2378 * and optionally a mask entry. Ensure this is the case.
2381 print_canon_ace_list( "file ace - before valid", file_ace);
2386 * A default 3 element mode entry for a file should be r-- --- ---.
2387 * A default 3 element mode entry for a directory should be rwx --- ---.
2390 st.st_ex_mode = create_default_mode(fsp, False);
2392 if (!ensure_canon_entry_valid(&file_ace, fsp->conn->params,
2393 fsp->is_directory, pfile_owner_sid, pfile_grp_sid, &st, True)) {
2394 free_canon_ace_list(file_ace);
2395 free_canon_ace_list(dir_ace);
2399 print_canon_ace_list( "dir ace - before valid", dir_ace);
2402 * A default inheritable 3 element mode entry for a directory should be the
2403 * mode Samba will use to create a file within. Ensure user rwx bits are set if
2407 st.st_ex_mode = create_default_mode(fsp, True);
2409 if (dir_ace && !ensure_canon_entry_valid(&dir_ace, fsp->conn->params,
2410 fsp->is_directory, pfile_owner_sid, pfile_grp_sid, &st, True)) {
2411 free_canon_ace_list(file_ace);
2412 free_canon_ace_list(dir_ace);
2416 print_canon_ace_list( "file ace - return", file_ace);
2417 print_canon_ace_list( "dir ace - return", dir_ace);
2419 *ppfile_ace = file_ace;
2420 *ppdir_ace = dir_ace;
2425 /******************************************************************************
2426 When returning permissions, try and fit NT display
2427 semantics if possible. Note the the canon_entries here must have been malloced.
2428 The list format should be - first entry = owner, followed by group and other user
2429 entries, last entry = other.
2431 Note that this doesn't exactly match the NT semantics for an ACL. As POSIX entries
2432 are not ordered, and match on the most specific entry rather than walking a list,
2433 then a simple POSIX permission of rw-r--r-- should really map to 5 entries,
2435 Entry 0: owner : deny all except read and write.
2436 Entry 1: owner : allow read and write.
2437 Entry 2: group : deny all except read.
2438 Entry 3: group : allow read.
2439 Entry 4: Everyone : allow read.
2441 But NT cannot display this in their ACL editor !
2442 ********************************************************************************/
2444 static void arrange_posix_perms(const char *filename, canon_ace **pp_list_head)
2446 canon_ace *l_head = *pp_list_head;
2447 canon_ace *owner_ace = NULL;
2448 canon_ace *other_ace = NULL;
2449 canon_ace *ace = NULL;
2451 for (ace = l_head; ace; ace = ace->next) {
2452 if (ace->type == SMB_ACL_USER_OBJ)
2454 else if (ace->type == SMB_ACL_OTHER) {
2455 /* Last ace - this is "other" */
2460 if (!owner_ace || !other_ace) {
2461 DEBUG(0,("arrange_posix_perms: Invalid POSIX permissions for file %s, missing owner or other.\n",
2467 * The POSIX algorithm applies to owner first, and other last,
2468 * so ensure they are arranged in this order.
2472 DLIST_PROMOTE(l_head, owner_ace);
2476 DLIST_DEMOTE(l_head, other_ace, canon_ace *);
2479 /* We have probably changed the head of the list. */
2481 *pp_list_head = l_head;
2484 /****************************************************************************
2485 Create a linked list of canonical ACE entries.
2486 ****************************************************************************/
2488 static canon_ace *canonicalise_acl(struct connection_struct *conn,
2489 const char *fname, SMB_ACL_T posix_acl,
2490 const SMB_STRUCT_STAT *psbuf,
2491 const DOM_SID *powner, const DOM_SID *pgroup, struct pai_val *pal, SMB_ACL_TYPE_T the_acl_type)
2493 mode_t acl_mask = (S_IRUSR|S_IWUSR|S_IXUSR);
2494 canon_ace *l_head = NULL;
2495 canon_ace *ace = NULL;
2496 canon_ace *next_ace = NULL;
2497 int entry_id = SMB_ACL_FIRST_ENTRY;
2498 SMB_ACL_ENTRY_T entry;
2501 while ( posix_acl && (SMB_VFS_SYS_ACL_GET_ENTRY(conn, posix_acl, entry_id, &entry) == 1)) {
2502 SMB_ACL_TAG_T tagtype;
2503 SMB_ACL_PERMSET_T permset;
2506 enum ace_owner owner_type;
2508 entry_id = SMB_ACL_NEXT_ENTRY;
2510 /* Is this a MASK entry ? */
2511 if (SMB_VFS_SYS_ACL_GET_TAG_TYPE(conn, entry, &tagtype) == -1)
2514 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, entry, &permset) == -1)
2517 /* Decide which SID to use based on the ACL type. */
2519 case SMB_ACL_USER_OBJ:
2520 /* Get the SID from the owner. */
2521 sid_copy(&sid, powner);
2522 unix_ug.uid = psbuf->st_ex_uid;
2523 owner_type = UID_ACE;
2527 uid_t *puid = (uid_t *)SMB_VFS_SYS_ACL_GET_QUALIFIER(conn, entry);
2529 DEBUG(0,("canonicalise_acl: Failed to get uid.\n"));
2532 uid_to_sid( &sid, *puid);
2533 unix_ug.uid = *puid;
2534 owner_type = UID_ACE;
2535 SMB_VFS_SYS_ACL_FREE_QUALIFIER(conn, (void *)puid,tagtype);
2538 case SMB_ACL_GROUP_OBJ:
2539 /* Get the SID from the owning group. */
2540 sid_copy(&sid, pgroup);
2541 unix_ug.gid = psbuf->st_ex_gid;
2542 owner_type = GID_ACE;
2546 gid_t *pgid = (gid_t *)SMB_VFS_SYS_ACL_GET_QUALIFIER(conn, entry);
2548 DEBUG(0,("canonicalise_acl: Failed to get gid.\n"));
2551 gid_to_sid( &sid, *pgid);
2552 unix_ug.gid = *pgid;
2553 owner_type = GID_ACE;
2554 SMB_VFS_SYS_ACL_FREE_QUALIFIER(conn, (void *)pgid,tagtype);
2558 acl_mask = convert_permset_to_mode_t(conn, permset);
2559 continue; /* Don't count the mask as an entry. */
2561 /* Use the Everyone SID */
2562 sid = global_sid_World;
2564 owner_type = WORLD_ACE;
2567 DEBUG(0,("canonicalise_acl: Unknown tagtype %u\n", (unsigned int)tagtype));
2572 * Add this entry to the list.
2575 if ((ace = SMB_MALLOC_P(canon_ace)) == NULL)
2579 ace->type = tagtype;
2580 ace->perms = convert_permset_to_mode_t(conn, permset);
2581 ace->attr = ALLOW_ACE;
2583 ace->unix_ug = unix_ug;
2584 ace->owner_type = owner_type;
2585 ace->ace_flags = get_pai_flags(pal, ace, (the_acl_type == SMB_ACL_TYPE_DEFAULT));
2587 DLIST_ADD(l_head, ace);
2591 * This next call will ensure we have at least a user/group/world set.
2594 if (!ensure_canon_entry_valid(&l_head, conn->params,
2595 S_ISDIR(psbuf->st_ex_mode), powner, pgroup,
2600 * Now go through the list, masking the permissions with the
2601 * acl_mask. Ensure all DENY Entries are at the start of the list.
2604 DEBUG(10,("canonicalise_acl: %s ace entries before arrange :\n", the_acl_type == SMB_ACL_TYPE_ACCESS ? "Access" : "Default" ));
2606 for ( ace_count = 0, ace = l_head; ace; ace = next_ace, ace_count++) {
2607 next_ace = ace->next;
2609 /* Masks are only applied to entries other than USER_OBJ and OTHER. */
2610 if (ace->type != SMB_ACL_OTHER && ace->type != SMB_ACL_USER_OBJ)
2611 ace->perms &= acl_mask;
2613 if (ace->perms == 0) {
2614 DLIST_PROMOTE(l_head, ace);
2617 if( DEBUGLVL( 10 ) ) {
2618 print_canon_ace(ace, ace_count);
2622 arrange_posix_perms(fname,&l_head );
2624 print_canon_ace_list( "canonicalise_acl: ace entries after arrange", l_head );
2630 free_canon_ace_list(l_head);
2634 /****************************************************************************
2635 Check if the current user group list contains a given group.
2636 ****************************************************************************/
2638 static bool current_user_in_group(gid_t gid)
2642 for (i = 0; i < current_user.ut.ngroups; i++) {
2643 if (current_user.ut.groups[i] == gid) {
2651 /****************************************************************************
2652 Should we override a deny ? Check 'acl group control' and 'dos filemode'.
2653 ****************************************************************************/
2655 static bool acl_group_override(connection_struct *conn,
2656 const struct smb_filename *smb_fname)
2658 if ((errno != EPERM) && (errno != EACCES)) {
2662 /* file primary group == user primary or supplementary group */
2663 if (lp_acl_group_control(SNUM(conn)) &&
2664 current_user_in_group(smb_fname->st.st_ex_gid)) {
2668 /* user has writeable permission */
2669 if (lp_dos_filemode(SNUM(conn)) &&
2670 can_write_to_file(conn, smb_fname)) {
2677 /****************************************************************************
2678 Attempt to apply an ACL to a file or directory.
2679 ****************************************************************************/
2681 static bool set_canon_ace_list(files_struct *fsp,
2684 const SMB_STRUCT_STAT *psbuf,
2685 bool *pacl_set_support)
2687 connection_struct *conn = fsp->conn;
2689 SMB_ACL_T the_acl = SMB_VFS_SYS_ACL_INIT(conn, (int)count_canon_ace_list(the_ace) + 1);
2692 SMB_ACL_ENTRY_T mask_entry;
2693 bool got_mask_entry = False;
2694 SMB_ACL_PERMSET_T mask_permset;
2695 SMB_ACL_TYPE_T the_acl_type = (default_ace ? SMB_ACL_TYPE_DEFAULT : SMB_ACL_TYPE_ACCESS);
2696 bool needs_mask = False;
2697 mode_t mask_perms = 0;
2699 /* Use the psbuf that was passed in. */
2700 fsp->fsp_name->st = *psbuf;
2702 #if defined(POSIX_ACL_NEEDS_MASK)
2703 /* HP-UX always wants to have a mask (called "class" there). */
2707 if (the_acl == NULL) {
2709 if (!no_acl_syscall_error(errno)) {
2711 * Only print this error message if we have some kind of ACL
2712 * support that's not working. Otherwise we would always get this.
2714 DEBUG(0,("set_canon_ace_list: Unable to init %s ACL. (%s)\n",
2715 default_ace ? "default" : "file", strerror(errno) ));
2717 *pacl_set_support = False;
2721 if( DEBUGLVL( 10 )) {
2722 dbgtext("set_canon_ace_list: setting ACL:\n");
2723 for (i = 0, p_ace = the_ace; p_ace; p_ace = p_ace->next, i++ ) {
2724 print_canon_ace( p_ace, i);
2728 for (i = 0, p_ace = the_ace; p_ace; p_ace = p_ace->next, i++ ) {
2729 SMB_ACL_ENTRY_T the_entry;
2730 SMB_ACL_PERMSET_T the_permset;
2733 * ACLs only "need" an ACL_MASK entry if there are any named user or
2734 * named group entries. But if there is an ACL_MASK entry, it applies
2735 * to ACL_USER, ACL_GROUP, and ACL_GROUP_OBJ entries. Set the mask
2736 * so that it doesn't deny (i.e., mask off) any permissions.
2739 if (p_ace->type == SMB_ACL_USER || p_ace->type == SMB_ACL_GROUP) {
2741 mask_perms |= p_ace->perms;
2742 } else if (p_ace->type == SMB_ACL_GROUP_OBJ) {
2743 mask_perms |= p_ace->perms;
2747 * Get the entry for this ACE.
2750 if (SMB_VFS_SYS_ACL_CREATE_ENTRY(conn, &the_acl, &the_entry) == -1) {
2751 DEBUG(0,("set_canon_ace_list: Failed to create entry %d. (%s)\n",
2752 i, strerror(errno) ));
2756 if (p_ace->type == SMB_ACL_MASK) {
2757 mask_entry = the_entry;
2758 got_mask_entry = True;
2762 * Ok - we now know the ACL calls should be working, don't
2763 * allow fallback to chmod.
2766 *pacl_set_support = True;
2769 * Initialise the entry from the canon_ace.
2773 * First tell the entry what type of ACE this is.
2776 if (SMB_VFS_SYS_ACL_SET_TAG_TYPE(conn, the_entry, p_ace->type) == -1) {
2777 DEBUG(0,("set_canon_ace_list: Failed to set tag type on entry %d. (%s)\n",
2778 i, strerror(errno) ));
2783 * Only set the qualifier (user or group id) if the entry is a user
2787 if ((p_ace->type == SMB_ACL_USER) || (p_ace->type == SMB_ACL_GROUP)) {
2788 if (SMB_VFS_SYS_ACL_SET_QUALIFIER(conn, the_entry,(void *)&p_ace->unix_ug.uid) == -1) {
2789 DEBUG(0,("set_canon_ace_list: Failed to set qualifier on entry %d. (%s)\n",
2790 i, strerror(errno) ));
2796 * Convert the mode_t perms in the canon_ace to a POSIX permset.
2799 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, the_entry, &the_permset) == -1) {
2800 DEBUG(0,("set_canon_ace_list: Failed to get permset on entry %d. (%s)\n",
2801 i, strerror(errno) ));
2805 if (map_acl_perms_to_permset(conn, p_ace->perms, &the_permset) == -1) {
2806 DEBUG(0,("set_canon_ace_list: Failed to create permset for mode (%u) on entry %d. (%s)\n",
2807 (unsigned int)p_ace->perms, i, strerror(errno) ));
2812 * ..and apply them to the entry.
2815 if (SMB_VFS_SYS_ACL_SET_PERMSET(conn, the_entry, the_permset) == -1) {
2816 DEBUG(0,("set_canon_ace_list: Failed to add permset on entry %d. (%s)\n",
2817 i, strerror(errno) ));
2822 print_canon_ace( p_ace, i);
2826 if (needs_mask && !got_mask_entry) {
2827 if (SMB_VFS_SYS_ACL_CREATE_ENTRY(conn, &the_acl, &mask_entry) == -1) {
2828 DEBUG(0,("set_canon_ace_list: Failed to create mask entry. (%s)\n", strerror(errno) ));
2832 if (SMB_VFS_SYS_ACL_SET_TAG_TYPE(conn, mask_entry, SMB_ACL_MASK) == -1) {
2833 DEBUG(0,("set_canon_ace_list: Failed to set tag type on mask entry. (%s)\n",strerror(errno) ));
2837 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, mask_entry, &mask_permset) == -1) {
2838 DEBUG(0,("set_canon_ace_list: Failed to get mask permset. (%s)\n", strerror(errno) ));
2842 if (map_acl_perms_to_permset(conn, S_IRUSR|S_IWUSR|S_IXUSR, &mask_permset) == -1) {
2843 DEBUG(0,("set_canon_ace_list: Failed to create mask permset. (%s)\n", strerror(errno) ));
2847 if (SMB_VFS_SYS_ACL_SET_PERMSET(conn, mask_entry, mask_permset) == -1) {
2848 DEBUG(0,("set_canon_ace_list: Failed to add mask permset. (%s)\n", strerror(errno) ));
2854 * Finally apply it to the file or directory.
2857 if(default_ace || fsp->is_directory || fsp->fh->fd == -1) {
2858 if (SMB_VFS_SYS_ACL_SET_FILE(conn, fsp->fsp_name->base_name,
2859 the_acl_type, the_acl) == -1) {
2861 * Some systems allow all the above calls and only fail with no ACL support
2862 * when attempting to apply the acl. HPUX with HFS is an example of this. JRA.
2864 if (no_acl_syscall_error(errno)) {
2865 *pacl_set_support = False;
2868 if (acl_group_override(conn, fsp->fsp_name)) {
2871 DEBUG(5,("set_canon_ace_list: acl group "
2872 "control on and current user in file "
2873 "%s primary group.\n",
2877 sret = SMB_VFS_SYS_ACL_SET_FILE(conn,
2878 fsp->fsp_name->base_name, the_acl_type,
2887 DEBUG(2,("set_canon_ace_list: "
2888 "sys_acl_set_file type %s failed for "
2890 the_acl_type == SMB_ACL_TYPE_DEFAULT ?
2891 "directory default" : "file",
2892 fsp_str_dbg(fsp), strerror(errno)));
2897 if (SMB_VFS_SYS_ACL_SET_FD(fsp, the_acl) == -1) {
2899 * Some systems allow all the above calls and only fail with no ACL support
2900 * when attempting to apply the acl. HPUX with HFS is an example of this. JRA.
2902 if (no_acl_syscall_error(errno)) {
2903 *pacl_set_support = False;
2906 if (acl_group_override(conn, fsp->fsp_name)) {
2909 DEBUG(5,("set_canon_ace_list: acl group "
2910 "control on and current user in file "
2911 "%s primary group.\n",
2915 sret = SMB_VFS_SYS_ACL_SET_FD(fsp, the_acl);
2923 DEBUG(2,("set_canon_ace_list: "
2924 "sys_acl_set_file failed for file %s "
2926 fsp_str_dbg(fsp), strerror(errno)));
2936 if (the_acl != NULL) {
2937 SMB_VFS_SYS_ACL_FREE_ACL(conn, the_acl);
2943 /****************************************************************************
2944 Find a particular canon_ace entry.
2945 ****************************************************************************/
2947 static struct canon_ace *canon_ace_entry_for(struct canon_ace *list, SMB_ACL_TAG_T type, posix_id *id)
2950 if (list->type == type && ((type != SMB_ACL_USER && type != SMB_ACL_GROUP) ||
2951 (type == SMB_ACL_USER && id && id->uid == list->unix_ug.uid) ||
2952 (type == SMB_ACL_GROUP && id && id->gid == list->unix_ug.gid)))
2959 /****************************************************************************
2961 ****************************************************************************/
2963 SMB_ACL_T free_empty_sys_acl(connection_struct *conn, SMB_ACL_T the_acl)
2965 SMB_ACL_ENTRY_T entry;
2969 if (SMB_VFS_SYS_ACL_GET_ENTRY(conn, the_acl, SMB_ACL_FIRST_ENTRY, &entry) != 1) {
2970 SMB_VFS_SYS_ACL_FREE_ACL(conn, the_acl);
2976 /****************************************************************************
2977 Convert a canon_ace to a generic 3 element permission - if possible.
2978 ****************************************************************************/
2980 #define MAP_PERM(p,mask,result) (((p) & (mask)) ? (result) : 0 )
2982 static bool convert_canon_ace_to_posix_perms( files_struct *fsp, canon_ace *file_ace_list, mode_t *posix_perms)
2984 int snum = SNUM(fsp->conn);
2985 size_t ace_count = count_canon_ace_list(file_ace_list);
2987 canon_ace *owner_ace = NULL;
2988 canon_ace *group_ace = NULL;
2989 canon_ace *other_ace = NULL;
2993 if (ace_count != 3) {
2994 DEBUG(3,("convert_canon_ace_to_posix_perms: Too many ACE "
2995 "entries for file %s to convert to posix perms.\n",
3000 for (ace_p = file_ace_list; ace_p; ace_p = ace_p->next) {
3001 if (ace_p->owner_type == UID_ACE)
3003 else if (ace_p->owner_type == GID_ACE)
3005 else if (ace_p->owner_type == WORLD_ACE)
3009 if (!owner_ace || !group_ace || !other_ace) {
3010 DEBUG(3,("convert_canon_ace_to_posix_perms: Can't get "
3011 "standard entries for file %s.\n", fsp_str_dbg(fsp)));
3015 *posix_perms = (mode_t)0;
3017 *posix_perms |= owner_ace->perms;
3018 *posix_perms |= MAP_PERM(group_ace->perms, S_IRUSR, S_IRGRP);
3019 *posix_perms |= MAP_PERM(group_ace->perms, S_IWUSR, S_IWGRP);
3020 *posix_perms |= MAP_PERM(group_ace->perms, S_IXUSR, S_IXGRP);
3021 *posix_perms |= MAP_PERM(other_ace->perms, S_IRUSR, S_IROTH);
3022 *posix_perms |= MAP_PERM(other_ace->perms, S_IWUSR, S_IWOTH);
3023 *posix_perms |= MAP_PERM(other_ace->perms, S_IXUSR, S_IXOTH);
3025 /* The owner must have at least read access. */
3027 *posix_perms |= S_IRUSR;
3028 if (fsp->is_directory)
3029 *posix_perms |= (S_IWUSR|S_IXUSR);
3031 /* If requested apply the masks. */
3033 /* Get the initial bits to apply. */
3035 if (fsp->is_directory) {
3036 and_bits = lp_dir_security_mask(snum);
3037 or_bits = lp_force_dir_security_mode(snum);
3039 and_bits = lp_security_mask(snum);
3040 or_bits = lp_force_security_mode(snum);
3043 *posix_perms = (((*posix_perms) & and_bits)|or_bits);
3045 DEBUG(10,("convert_canon_ace_to_posix_perms: converted u=%o,g=%o,w=%o "
3046 "to perm=0%o for file %s.\n", (int)owner_ace->perms,
3047 (int)group_ace->perms, (int)other_ace->perms,
3048 (int)*posix_perms, fsp_str_dbg(fsp)));
3053 /****************************************************************************
3054 Incoming NT ACLs on a directory can be split into a default POSIX acl (CI|OI|IO) and
3055 a normal POSIX acl. Win2k needs these split acls re-merging into one ACL
3056 with CI|OI set so it is inherited and also applies to the directory.
3057 Based on code from "Jim McDonough" <jmcd@us.ibm.com>.
3058 ****************************************************************************/
3060 static size_t merge_default_aces( SEC_ACE *nt_ace_list, size_t num_aces)
3064 for (i = 0; i < num_aces; i++) {
3065 for (j = i+1; j < num_aces; j++) {
3066 uint32 i_flags_ni = (nt_ace_list[i].flags & ~SEC_ACE_FLAG_INHERITED_ACE);
3067 uint32 j_flags_ni = (nt_ace_list[j].flags & ~SEC_ACE_FLAG_INHERITED_ACE);
3068 bool i_inh = (nt_ace_list[i].flags & SEC_ACE_FLAG_INHERITED_ACE) ? True : False;
3069 bool j_inh = (nt_ace_list[j].flags & SEC_ACE_FLAG_INHERITED_ACE) ? True : False;
3071 /* We know the lower number ACE's are file entries. */
3072 if ((nt_ace_list[i].type == nt_ace_list[j].type) &&
3073 (nt_ace_list[i].size == nt_ace_list[j].size) &&
3074 (nt_ace_list[i].access_mask == nt_ace_list[j].access_mask) &&
3075 sid_equal(&nt_ace_list[i].trustee, &nt_ace_list[j].trustee) &&
3077 (i_flags_ni == 0) &&
3078 (j_flags_ni == (SEC_ACE_FLAG_OBJECT_INHERIT|
3079 SEC_ACE_FLAG_CONTAINER_INHERIT|
3080 SEC_ACE_FLAG_INHERIT_ONLY))) {
3082 * W2K wants to have access allowed zero access ACE's
3083 * at the end of the list. If the mask is zero, merge
3084 * the non-inherited ACE onto the inherited ACE.
3087 if (nt_ace_list[i].access_mask == 0) {
3088 nt_ace_list[j].flags = SEC_ACE_FLAG_OBJECT_INHERIT|SEC_ACE_FLAG_CONTAINER_INHERIT|
3089 (i_inh ? SEC_ACE_FLAG_INHERITED_ACE : 0);
3090 if (num_aces - i - 1 > 0)
3091 memmove(&nt_ace_list[i], &nt_ace_list[i+1], (num_aces-i-1) *
3094 DEBUG(10,("merge_default_aces: Merging zero access ACE %u onto ACE %u.\n",
3095 (unsigned int)i, (unsigned int)j ));
3098 * These are identical except for the flags.
3099 * Merge the inherited ACE onto the non-inherited ACE.
3102 nt_ace_list[i].flags = SEC_ACE_FLAG_OBJECT_INHERIT|SEC_ACE_FLAG_CONTAINER_INHERIT|
3103 (i_inh ? SEC_ACE_FLAG_INHERITED_ACE : 0);
3104 if (num_aces - j - 1 > 0)
3105 memmove(&nt_ace_list[j], &nt_ace_list[j+1], (num_aces-j-1) *
3108 DEBUG(10,("merge_default_aces: Merging ACE %u onto ACE %u.\n",
3109 (unsigned int)j, (unsigned int)i ));
3121 * Add or Replace ACE entry.
3122 * In some cases we need to add a specific ACE for compatibility reasons.
3123 * When doing that we must make sure we are not actually creating a duplicate
3124 * entry. So we need to search whether an ACE entry already exist and eventually
3125 * replacce the access mask, or add a completely new entry if none was found.
3127 * This function assumes the array has enough space to add a new entry without
3128 * any reallocation of memory.
3131 static void add_or_replace_ace(SEC_ACE *nt_ace_list, size_t *num_aces,
3132 const DOM_SID *sid, enum security_ace_type type,
3133 uint32_t mask, uint8_t flags)
3137 /* first search for a duplicate */
3138 for (i = 0; i < *num_aces; i++) {
3139 if (sid_equal(&nt_ace_list[i].trustee, sid) &&
3140 (nt_ace_list[i].flags == flags)) break;
3143 if (i < *num_aces) { /* found */
3144 nt_ace_list[i].type = type;
3145 nt_ace_list[i].access_mask = mask;
3146 DEBUG(10, ("Replacing ACE %d with SID %s and flags %02x\n",
3147 i, sid_string_dbg(sid), flags));
3151 /* not found, append it */
3152 init_sec_ace(&nt_ace_list[(*num_aces)++], sid, type, mask, flags);
3156 /****************************************************************************
3157 Reply to query a security descriptor from an fsp. If it succeeds it allocates
3158 the space for the return elements and returns the size needed to return the
3159 security descriptor. This should be the only external function needed for
3160 the UNIX style get ACL.
3161 ****************************************************************************/
3163 static NTSTATUS posix_get_nt_acl_common(struct connection_struct *conn,
3165 const SMB_STRUCT_STAT *sbuf,
3166 struct pai_val *pal,
3167 SMB_ACL_T posix_acl,
3169 uint32_t security_info,
3175 SEC_ACL *psa = NULL;
3176 size_t num_acls = 0;
3177 size_t num_def_acls = 0;
3178 size_t num_aces = 0;
3179 canon_ace *file_ace = NULL;
3180 canon_ace *dir_ace = NULL;
3181 SEC_ACE *nt_ace_list = NULL;
3182 size_t num_profile_acls = 0;
3183 DOM_SID orig_owner_sid;
3184 SEC_DESC *psd = NULL;
3188 * Get the owner, group and world SIDs.
3191 create_file_sids(sbuf, &owner_sid, &group_sid);
3193 if (lp_profile_acls(SNUM(conn))) {
3194 /* For WXP SP1 the owner must be administrators. */
3195 sid_copy(&orig_owner_sid, &owner_sid);
3196 sid_copy(&owner_sid, &global_sid_Builtin_Administrators);
3197 sid_copy(&group_sid, &global_sid_Builtin_Users);
3198 num_profile_acls = 3;
3201 if ((security_info & DACL_SECURITY_INFORMATION) && !(security_info & PROTECTED_DACL_SECURITY_INFORMATION)) {
3204 * In the optimum case Creator Owner and Creator Group would be used for
3205 * the ACL_USER_OBJ and ACL_GROUP_OBJ entries, respectively, but this
3206 * would lead to usability problems under Windows: The Creator entries
3207 * are only available in browse lists of directories and not for files;
3208 * additionally the identity of the owning group couldn't be determined.
3209 * We therefore use those identities only for Default ACLs.
3212 /* Create the canon_ace lists. */
3213 file_ace = canonicalise_acl(conn, name, posix_acl, sbuf,
3214 &owner_sid, &group_sid, pal,
3215 SMB_ACL_TYPE_ACCESS);
3217 /* We must have *some* ACLS. */
3219 if (count_canon_ace_list(file_ace) == 0) {
3220 DEBUG(0,("get_nt_acl : No ACLs on file (%s) !\n", name));
3224 if (S_ISDIR(sbuf->st_ex_mode) && def_acl) {
3225 dir_ace = canonicalise_acl(conn, name, def_acl,
3227 &global_sid_Creator_Owner,
3228 &global_sid_Creator_Group,
3229 pal, SMB_ACL_TYPE_DEFAULT);
3233 * Create the NT ACE list from the canonical ace lists.
3238 enum security_ace_type nt_acl_type;
3240 if (nt4_compatible_acls() && dir_ace) {
3242 * NT 4 chokes if an ACL contains an INHERIT_ONLY entry
3243 * but no non-INHERIT_ONLY entry for one SID. So we only
3244 * remove entries from the Access ACL if the
3245 * corresponding Default ACL entries have also been
3246 * removed. ACEs for CREATOR-OWNER and CREATOR-GROUP
3247 * are exceptions. We can do nothing
3248 * intelligent if the Default ACL contains entries that
3249 * are not also contained in the Access ACL, so this
3250 * case will still fail under NT 4.
3253 ace = canon_ace_entry_for(dir_ace, SMB_ACL_OTHER, NULL);
3254 if (ace && !ace->perms) {
3255 DLIST_REMOVE(dir_ace, ace);
3258 ace = canon_ace_entry_for(file_ace, SMB_ACL_OTHER, NULL);
3259 if (ace && !ace->perms) {
3260 DLIST_REMOVE(file_ace, ace);
3266 * WinNT doesn't usually have Creator Group
3267 * in browse lists, so we send this entry to
3268 * WinNT even if it contains no relevant
3269 * permissions. Once we can add
3270 * Creator Group to browse lists we can
3275 ace = canon_ace_entry_for(dir_ace, SMB_ACL_GROUP_OBJ, NULL);
3276 if (ace && !ace->perms) {
3277 DLIST_REMOVE(dir_ace, ace);
3282 ace = canon_ace_entry_for(file_ace, SMB_ACL_GROUP_OBJ, NULL);
3283 if (ace && !ace->perms) {
3284 DLIST_REMOVE(file_ace, ace);
3289 num_acls = count_canon_ace_list(file_ace);
3290 num_def_acls = count_canon_ace_list(dir_ace);
3292 /* Allocate the ace list. */
3293 if ((nt_ace_list = SMB_MALLOC_ARRAY(SEC_ACE,num_acls + num_profile_acls + num_def_acls)) == NULL) {
3294 DEBUG(0,("get_nt_acl: Unable to malloc space for nt_ace_list.\n"));
3298 memset(nt_ace_list, '\0', (num_acls + num_def_acls) * sizeof(SEC_ACE) );
3301 * Create the NT ACE list from the canonical ace lists.
3304 for (ace = file_ace; ace != NULL; ace = ace->next) {
3305 uint32_t acc = map_canon_ace_perms(SNUM(conn),
3308 S_ISDIR(sbuf->st_ex_mode));
3309 init_sec_ace(&nt_ace_list[num_aces++],
3316 /* The User must have access to a profile share - even
3317 * if we can't map the SID. */
3318 if (lp_profile_acls(SNUM(conn))) {
3319 add_or_replace_ace(nt_ace_list, &num_aces,
3320 &global_sid_Builtin_Users,
3321 SEC_ACE_TYPE_ACCESS_ALLOWED,
3322 FILE_GENERIC_ALL, 0);
3325 for (ace = dir_ace; ace != NULL; ace = ace->next) {
3326 uint32_t acc = map_canon_ace_perms(SNUM(conn),
3329 S_ISDIR(sbuf->st_ex_mode));
3330 init_sec_ace(&nt_ace_list[num_aces++],
3335 SEC_ACE_FLAG_OBJECT_INHERIT|
3336 SEC_ACE_FLAG_CONTAINER_INHERIT|
3337 SEC_ACE_FLAG_INHERIT_ONLY);
3340 /* The User must have access to a profile share - even
3341 * if we can't map the SID. */
3342 if (lp_profile_acls(SNUM(conn))) {
3343 add_or_replace_ace(nt_ace_list, &num_aces,
3344 &global_sid_Builtin_Users,
3345 SEC_ACE_TYPE_ACCESS_ALLOWED,
3347 SEC_ACE_FLAG_OBJECT_INHERIT |
3348 SEC_ACE_FLAG_CONTAINER_INHERIT |
3349 SEC_ACE_FLAG_INHERIT_ONLY);
3353 * Merge POSIX default ACLs and normal ACLs into one NT ACE.
3354 * Win2K needs this to get the inheritance correct when replacing ACLs
3355 * on a directory tree. Based on work by Jim @ IBM.
3358 num_aces = merge_default_aces(nt_ace_list, num_aces);
3360 if (lp_profile_acls(SNUM(conn))) {
3361 for (i = 0; i < num_aces; i++) {
3362 if (sid_equal(&nt_ace_list[i].trustee, &owner_sid)) {
3363 add_or_replace_ace(nt_ace_list, &num_aces,
3365 nt_ace_list[i].type,
3366 nt_ace_list[i].access_mask,
3367 nt_ace_list[i].flags);
3375 if((psa = make_sec_acl( talloc_tos(), NT4_ACL_REVISION, num_aces, nt_ace_list)) == NULL) {
3376 DEBUG(0,("get_nt_acl: Unable to malloc space for acl.\n"));
3380 } /* security_info & DACL_SECURITY_INFORMATION */
3382 psd = make_standard_sec_desc( talloc_tos(),
3383 (security_info & OWNER_SECURITY_INFORMATION) ? &owner_sid : NULL,
3384 (security_info & GROUP_SECURITY_INFORMATION) ? &group_sid : NULL,
3389 DEBUG(0,("get_nt_acl: Unable to malloc space for security descriptor.\n"));
3395 * Windows 2000: The DACL_PROTECTED flag in the security
3396 * descriptor marks the ACL as non-inheriting, i.e., no
3397 * ACEs from higher level directories propagate to this
3398 * ACL. In the POSIX ACL model permissions are only
3399 * inherited at file create time, so ACLs never contain
3400 * any ACEs that are inherited dynamically. The DACL_PROTECTED
3401 * flag doesn't seem to bother Windows NT.
3402 * Always set this if map acl inherit is turned off.
3404 if (pal == NULL || !lp_map_acl_inherit(SNUM(conn))) {
3405 psd->type |= SEC_DESC_DACL_PROTECTED;
3407 psd->type |= pal->sd_type;
3411 dacl_sort_into_canonical_order(psd->dacl->aces, (unsigned int)psd->dacl->num_aces);
3419 SMB_VFS_SYS_ACL_FREE_ACL(conn, posix_acl);
3422 SMB_VFS_SYS_ACL_FREE_ACL(conn, def_acl);
3424 free_canon_ace_list(file_ace);
3425 free_canon_ace_list(dir_ace);
3426 free_inherited_info(pal);
3427 SAFE_FREE(nt_ace_list);
3429 return NT_STATUS_OK;
3432 NTSTATUS posix_fget_nt_acl(struct files_struct *fsp, uint32_t security_info,
3435 SMB_STRUCT_STAT sbuf;
3436 SMB_ACL_T posix_acl = NULL;
3437 struct pai_val *pal;
3441 DEBUG(10,("posix_fget_nt_acl: called for file %s\n",
3444 /* can it happen that fsp_name == NULL ? */
3445 if (fsp->is_directory || fsp->fh->fd == -1) {
3446 return posix_get_nt_acl(fsp->conn, fsp->fsp_name->base_name,
3447 security_info, ppdesc);
3450 /* Get the stat struct for the owner info. */
3451 if(SMB_VFS_FSTAT(fsp, &sbuf) != 0) {
3452 return map_nt_error_from_unix(errno);
3455 /* Get the ACL from the fd. */
3456 posix_acl = SMB_VFS_SYS_ACL_GET_FD(fsp);
3458 pal = fload_inherited_info(fsp);
3460 return posix_get_nt_acl_common(fsp->conn, fsp->fsp_name->base_name,
3461 &sbuf, pal, posix_acl, NULL,
3462 security_info, ppdesc);
3465 NTSTATUS posix_get_nt_acl(struct connection_struct *conn, const char *name,
3466 uint32_t security_info, SEC_DESC **ppdesc)
3468 SMB_ACL_T posix_acl = NULL;
3469 SMB_ACL_T def_acl = NULL;
3470 struct pai_val *pal;
3471 struct smb_filename smb_fname;
3476 DEBUG(10,("posix_get_nt_acl: called for file %s\n", name ));
3478 ZERO_STRUCT(smb_fname);
3479 smb_fname.base_name = discard_const_p(char, name);
3481 /* Get the stat struct for the owner info. */
3482 if (lp_posix_pathnames()) {
3483 ret = SMB_VFS_LSTAT(conn, &smb_fname);
3485 ret = SMB_VFS_STAT(conn, &smb_fname);
3489 return map_nt_error_from_unix(errno);
3492 /* Get the ACL from the path. */
3493 posix_acl = SMB_VFS_SYS_ACL_GET_FILE(conn, name, SMB_ACL_TYPE_ACCESS);
3495 /* If it's a directory get the default POSIX ACL. */
3496 if(S_ISDIR(smb_fname.st.st_ex_mode)) {
3497 def_acl = SMB_VFS_SYS_ACL_GET_FILE(conn, name, SMB_ACL_TYPE_DEFAULT);
3498 def_acl = free_empty_sys_acl(conn, def_acl);
3501 pal = load_inherited_info(conn, name);
3503 return posix_get_nt_acl_common(conn, name, &smb_fname.st, pal,
3504 posix_acl, def_acl, security_info,
3508 /****************************************************************************
3509 Try to chown a file. We will be able to chown it under the following conditions.
3511 1) If we have root privileges, then it will just work.
3512 2) If we have SeTakeOwnershipPrivilege we can change the user to the current user.
3513 3) If we have SeRestorePrivilege we can change the user to any other user.
3514 4) If we have write permission to the file and dos_filemodes is set
3515 then allow chown to the currently authenticated user.
3516 ****************************************************************************/
3518 int try_chown(connection_struct *conn, struct smb_filename *smb_fname,
3519 uid_t uid, gid_t gid)
3524 if(!CAN_WRITE(conn)) {
3529 /* try the direct way first */
3530 if (lp_posix_pathnames()) {
3531 ret = SMB_VFS_LCHOWN(conn, smb_fname->base_name, uid, gid);
3533 ret = SMB_VFS_CHOWN(conn, smb_fname->base_name, uid, gid);
3539 /* Case (2) / (3) */
3540 if (lp_enable_privileges()) {
3542 bool has_take_ownership_priv = user_has_privileges(current_user.nt_user_token,
3543 &se_take_ownership);
3544 bool has_restore_priv = user_has_privileges(current_user.nt_user_token,
3548 if ( ( has_take_ownership_priv && ( uid == current_user.ut.uid ) ) ||
3550 ( has_restore_priv ) ) {
3553 /* Keep the current file gid the same - take ownership doesn't imply group change. */
3554 if (lp_posix_pathnames()) {
3555 ret = SMB_VFS_LCHOWN(conn, smb_fname->base_name, uid,
3558 ret = SMB_VFS_CHOWN(conn, smb_fname->base_name, uid,
3567 if (!lp_dos_filemode(SNUM(conn))) {
3572 /* only allow chown to the current user. This is more secure,
3573 and also copes with the case where the SID in a take ownership ACL is
3574 a local SID on the users workstation
3576 if (uid != current_user.ut.uid) {
3581 if (lp_posix_pathnames()) {
3582 ret = SMB_VFS_LSTAT(conn, smb_fname);
3584 ret = SMB_VFS_STAT(conn, smb_fname);
3591 if (!NT_STATUS_IS_OK(open_file_fchmod(NULL, conn, smb_fname, &fsp))) {
3596 /* Keep the current file gid the same. */
3597 if (fsp->fh->fd == -1) {
3598 if (lp_posix_pathnames()) {
3599 ret = SMB_VFS_LCHOWN(conn, smb_fname->base_name, uid,
3602 ret = SMB_VFS_CHOWN(conn, smb_fname->base_name, uid,
3606 ret = SMB_VFS_FCHOWN(fsp, uid, (gid_t)-1);
3610 close_file_fchmod(NULL, fsp);
3616 /* Disable this - prevents ACL inheritance from the ACL editor. JRA. */
3618 /****************************************************************************
3619 Take care of parent ACL inheritance.
3620 ****************************************************************************/
3622 NTSTATUS append_parent_acl(files_struct *fsp,
3623 const SEC_DESC *pcsd,
3624 SEC_DESC **pp_new_sd)
3626 struct smb_filename *smb_dname = NULL;
3627 SEC_DESC *parent_sd = NULL;
3628 files_struct *parent_fsp = NULL;
3629 TALLOC_CTX *mem_ctx = talloc_tos();
3630 char *parent_name = NULL;
3631 SEC_ACE *new_ace = NULL;
3632 unsigned int num_aces = pcsd->dacl->num_aces;
3636 SEC_DESC *psd = dup_sec_desc(talloc_tos(), pcsd);
3637 bool is_dacl_protected = (pcsd->type & SEC_DESC_DACL_PROTECTED);
3640 return NT_STATUS_NO_MEMORY;
3643 if (!parent_dirname(mem_ctx, fsp->fsp_name->base_name, &parent_name,
3645 return NT_STATUS_NO_MEMORY;
3648 status = create_synthetic_smb_fname(mem_ctx, parent_name, NULL, NULL,
3650 if (!NT_STATUS_IS_OK(status)) {
3654 status = SMB_VFS_CREATE_FILE(
3655 fsp->conn, /* conn */
3657 0, /* root_dir_fid */
3658 smb_dname, /* fname */
3659 FILE_READ_ATTRIBUTES, /* access_mask */
3660 FILE_SHARE_NONE, /* share_access */
3661 FILE_OPEN, /* create_disposition*/
3662 FILE_DIRECTORY_FILE, /* create_options */
3663 0, /* file_attributes */
3664 INTERNAL_OPEN_ONLY, /* oplock_request */
3665 0, /* allocation_size */
3668 &parent_fsp, /* result */
3671 if (!NT_STATUS_IS_OK(status)) {
3672 TALLOC_FREE(smb_dname);
3676 status = SMB_VFS_GET_NT_ACL(parent_fsp->conn, smb_dname->base_name,
3677 DACL_SECURITY_INFORMATION, &parent_sd );
3679 close_file(NULL, parent_fsp, NORMAL_CLOSE);
3680 TALLOC_FREE(smb_dname);
3682 if (!NT_STATUS_IS_OK(status)) {
3687 * Make room for potentially all the ACLs from
3688 * the parent. We used to add the ugw triple here,
3689 * as we knew we were dealing with POSIX ACLs.
3690 * We no longer need to do so as we can guarentee
3691 * that a default ACL from the parent directory will
3692 * be well formed for POSIX ACLs if it came from a
3693 * POSIX ACL source, and if we're not writing to a
3694 * POSIX ACL sink then we don't care if it's not well
3698 num_aces += parent_sd->dacl->num_aces;
3700 if((new_ace = TALLOC_ZERO_ARRAY(mem_ctx, SEC_ACE,
3701 num_aces)) == NULL) {
3702 return NT_STATUS_NO_MEMORY;
3705 /* Start by copying in all the given ACE entries. */
3706 for (i = 0; i < psd->dacl->num_aces; i++) {
3707 sec_ace_copy(&new_ace[i], &psd->dacl->aces[i]);
3711 * Note that we're ignoring "inherit permissions" here
3712 * as that really only applies to newly created files. JRA.
3715 /* Finally append any inherited ACEs. */
3716 for (j = 0; j < parent_sd->dacl->num_aces; j++) {
3717 SEC_ACE *se = &parent_sd->dacl->aces[j];
3719 if (fsp->is_directory) {
3720 if (!(se->flags & SEC_ACE_FLAG_CONTAINER_INHERIT)) {
3721 /* Doesn't apply to a directory - ignore. */
3722 DEBUG(10,("append_parent_acl: directory %s "
3723 "ignoring non container "
3724 "inherit flags %u on ACE with sid %s "
3727 (unsigned int)se->flags,
3728 sid_string_dbg(&se->trustee),
3733 if (!(se->flags & SEC_ACE_FLAG_OBJECT_INHERIT)) {
3734 /* Doesn't apply to a file - ignore. */
3735 DEBUG(10,("append_parent_acl: file %s "
3736 "ignoring non object "
3737 "inherit flags %u on ACE with sid %s "
3740 (unsigned int)se->flags,
3741 sid_string_dbg(&se->trustee),
3747 if (is_dacl_protected) {
3748 /* If the DACL is protected it means we must
3749 * not overwrite an existing ACE entry with the
3750 * same SID. This is order N^2. Ouch :-(. JRA. */
3752 for (k = 0; k < psd->dacl->num_aces; k++) {
3753 if (sid_equal(&psd->dacl->aces[k].trustee,
3758 if (k < psd->dacl->num_aces) {
3759 /* SID matched. Ignore. */
3760 DEBUG(10,("append_parent_acl: path %s "
3761 "ignoring ACE with protected sid %s "
3764 sid_string_dbg(&se->trustee),
3770 sec_ace_copy(&new_ace[i], se);
3771 if (se->flags & SEC_ACE_FLAG_NO_PROPAGATE_INHERIT) {
3772 new_ace[i].flags &= ~(SEC_ACE_FLAG_VALID_INHERIT);
3774 new_ace[i].flags |= SEC_ACE_FLAG_INHERITED_ACE;
3776 if (fsp->is_directory) {
3778 * Strip off any inherit only. It's applied.
3780 new_ace[i].flags &= ~(SEC_ACE_FLAG_INHERIT_ONLY);
3781 if (se->flags & SEC_ACE_FLAG_NO_PROPAGATE_INHERIT) {
3782 /* No further inheritance. */
3784 ~(SEC_ACE_FLAG_CONTAINER_INHERIT|
3785 SEC_ACE_FLAG_OBJECT_INHERIT);
3789 * Strip off any container or inherit
3790 * flags, they can't apply to objects.
3792 new_ace[i].flags &= ~(SEC_ACE_FLAG_CONTAINER_INHERIT|
3793 SEC_ACE_FLAG_INHERIT_ONLY|
3794 SEC_ACE_FLAG_NO_PROPAGATE_INHERIT);
3798 DEBUG(10,("append_parent_acl: path %s "
3799 "inheriting ACE with sid %s "
3802 sid_string_dbg(&se->trustee),
3806 psd->dacl->aces = new_ace;
3807 psd->dacl->num_aces = i;
3808 psd->type &= ~(SE_DESC_DACL_AUTO_INHERITED|
3809 SE_DESC_DACL_AUTO_INHERIT_REQ);
3816 /****************************************************************************
3817 Reply to set a security descriptor on an fsp. security_info_sent is the
3818 description of the following NT ACL.
3819 This should be the only external function needed for the UNIX style set ACL.
3820 ****************************************************************************/
3822 NTSTATUS set_nt_acl(files_struct *fsp, uint32 security_info_sent, const SEC_DESC *psd)
3824 connection_struct *conn = fsp->conn;
3825 uid_t user = (uid_t)-1;
3826 gid_t grp = (gid_t)-1;
3827 DOM_SID file_owner_sid;
3828 DOM_SID file_grp_sid;
3829 canon_ace *file_ace_list = NULL;
3830 canon_ace *dir_ace_list = NULL;
3831 bool acl_perms = False;
3832 mode_t orig_mode = (mode_t)0;
3834 bool set_acl_as_root = false;
3835 bool acl_set_support = false;
3838 DEBUG(10,("set_nt_acl: called for file %s\n",
3841 if (!CAN_WRITE(conn)) {
3842 DEBUG(10,("set acl rejected on read-only share\n"));
3843 return NT_STATUS_MEDIA_WRITE_PROTECTED;
3847 * Get the current state of the file.
3850 status = vfs_stat_fsp(fsp);
3851 if (!NT_STATUS_IS_OK(status)) {
3855 /* Save the original element we check against. */
3856 orig_mode = fsp->fsp_name->st.st_ex_mode;
3859 * Unpack the user/group/world id's.
3862 status = unpack_nt_owners( SNUM(conn), &user, &grp, security_info_sent, psd);
3863 if (!NT_STATUS_IS_OK(status)) {
3868 * Do we need to chown ? If so this must be done first as the incoming
3869 * CREATOR_OWNER acl will be relative to the *new* owner, not the old.
3873 if (((user != (uid_t)-1) && (fsp->fsp_name->st.st_ex_uid != user)) ||
3874 (( grp != (gid_t)-1) && (fsp->fsp_name->st.st_ex_gid != grp))) {
3876 DEBUG(3,("set_nt_acl: chown %s. uid = %u, gid = %u.\n",
3877 fsp_str_dbg(fsp), (unsigned int)user,
3878 (unsigned int)grp));
3880 if(try_chown(fsp->conn, fsp->fsp_name, user, grp) == -1) {
3881 DEBUG(3,("set_nt_acl: chown %s, %u, %u failed. Error "
3882 "= %s.\n", fsp_str_dbg(fsp),
3883 (unsigned int)user, (unsigned int)grp,
3885 if (errno == EPERM) {
3886 return NT_STATUS_INVALID_OWNER;
3888 return map_nt_error_from_unix(errno);
3892 * Recheck the current state of the file, which may have changed.
3893 * (suid/sgid bits, for instance)
3896 status = vfs_stat_fsp(fsp);
3897 if (!NT_STATUS_IS_OK(status)) {
3901 /* Save the original element we check against. */
3902 orig_mode = fsp->fsp_name->st.st_ex_mode;
3904 /* If we successfully chowned, we know we must
3905 * be able to set the acl, so do it as root.
3907 set_acl_as_root = true;
3910 create_file_sids(&fsp->fsp_name->st, &file_owner_sid, &file_grp_sid);
3912 acl_perms = unpack_canon_ace(fsp, &fsp->fsp_name->st, &file_owner_sid,
3913 &file_grp_sid, &file_ace_list,
3914 &dir_ace_list, security_info_sent, psd);
3916 /* Ignore W2K traverse DACL set. */
3917 if (!file_ace_list && !dir_ace_list) {
3918 return NT_STATUS_OK;
3922 DEBUG(3,("set_nt_acl: cannot set permissions\n"));
3923 free_canon_ace_list(file_ace_list);
3924 free_canon_ace_list(dir_ace_list);
3925 return NT_STATUS_ACCESS_DENIED;
3929 * Only change security if we got a DACL.
3932 if(!(security_info_sent & DACL_SECURITY_INFORMATION) || (psd->dacl == NULL)) {
3933 free_canon_ace_list(file_ace_list);
3934 free_canon_ace_list(dir_ace_list);
3935 return NT_STATUS_OK;
3939 * Try using the POSIX ACL set first. Fall back to chmod if
3940 * we have no ACL support on this filesystem.
3943 if (acl_perms && file_ace_list) {
3944 if (set_acl_as_root) {
3947 ret = set_canon_ace_list(fsp, file_ace_list, false,
3948 &fsp->fsp_name->st, &acl_set_support);
3949 if (set_acl_as_root) {
3952 if (acl_set_support && ret == false) {
3953 DEBUG(3,("set_nt_acl: failed to set file acl on file "
3954 "%s (%s).\n", fsp_str_dbg(fsp),
3956 free_canon_ace_list(file_ace_list);
3957 free_canon_ace_list(dir_ace_list);
3958 return map_nt_error_from_unix(errno);
3962 if (acl_perms && acl_set_support && fsp->is_directory) {
3964 if (set_acl_as_root) {
3967 ret = set_canon_ace_list(fsp, dir_ace_list, true,
3970 if (set_acl_as_root) {
3974 DEBUG(3,("set_nt_acl: failed to set default "
3975 "acl on directory %s (%s).\n",
3976 fsp_str_dbg(fsp), strerror(errno)));
3977 free_canon_ace_list(file_ace_list);
3978 free_canon_ace_list(dir_ace_list);
3979 return map_nt_error_from_unix(errno);
3985 * No default ACL - delete one if it exists.
3988 if (set_acl_as_root) {
3991 sret = SMB_VFS_SYS_ACL_DELETE_DEF_FILE(conn,
3992 fsp->fsp_name->base_name);
3993 if (set_acl_as_root) {
3997 if (acl_group_override(conn, fsp->fsp_name)) {
3998 DEBUG(5,("set_nt_acl: acl group "
3999 "control on and current user "
4000 "in file %s primary group. "
4001 "Override delete_def_acl\n",
4006 SMB_VFS_SYS_ACL_DELETE_DEF_FILE(
4008 fsp->fsp_name->base_name);
4013 DEBUG(3,("set_nt_acl: sys_acl_delete_def_file failed (%s)\n", strerror(errno)));
4014 free_canon_ace_list(file_ace_list);
4015 free_canon_ace_list(dir_ace_list);
4016 return map_nt_error_from_unix(errno);
4022 if (acl_set_support) {
4023 if (set_acl_as_root) {
4026 store_inheritance_attributes(fsp,
4030 if (set_acl_as_root) {
4036 * If we cannot set using POSIX ACLs we fall back to checking if we need to chmod.
4039 if(!acl_set_support && acl_perms) {
4042 if (!convert_canon_ace_to_posix_perms( fsp, file_ace_list, &posix_perms)) {
4043 free_canon_ace_list(file_ace_list);
4044 free_canon_ace_list(dir_ace_list);
4045 DEBUG(3,("set_nt_acl: failed to convert file acl to "
4046 "posix permissions for file %s.\n",
4048 return NT_STATUS_ACCESS_DENIED;
4051 if (orig_mode != posix_perms) {
4054 DEBUG(3,("set_nt_acl: chmod %s. perms = 0%o.\n",
4055 fsp_str_dbg(fsp), (unsigned int)posix_perms));
4057 if (set_acl_as_root) {
4060 sret = SMB_VFS_CHMOD(conn, fsp->fsp_name->base_name,
4062 if (set_acl_as_root) {
4066 if (acl_group_override(conn, fsp->fsp_name)) {
4067 DEBUG(5,("set_nt_acl: acl group "
4068 "control on and current user "
4069 "in file %s primary group. "
4074 sret = SMB_VFS_CHMOD(conn,
4075 fsp->fsp_name->base_name,
4081 DEBUG(3,("set_nt_acl: chmod %s, 0%o "
4082 "failed. Error = %s.\n",
4084 (unsigned int)posix_perms,
4086 free_canon_ace_list(file_ace_list);
4087 free_canon_ace_list(dir_ace_list);
4088 return map_nt_error_from_unix(errno);
4094 free_canon_ace_list(file_ace_list);
4095 free_canon_ace_list(dir_ace_list);
4097 /* Ensure the stat struct in the fsp is correct. */
4098 status = vfs_stat_fsp(fsp);
4100 return NT_STATUS_OK;
4103 /****************************************************************************
4104 Get the actual group bits stored on a file with an ACL. Has no effect if
4105 the file has no ACL. Needed in dosmode code where the stat() will return
4106 the mask bits, not the real group bits, for a file with an ACL.
4107 ****************************************************************************/
4109 int get_acl_group_bits( connection_struct *conn, const char *fname, mode_t *mode )
4111 int entry_id = SMB_ACL_FIRST_ENTRY;
4112 SMB_ACL_ENTRY_T entry;
4113 SMB_ACL_T posix_acl;
4116 posix_acl = SMB_VFS_SYS_ACL_GET_FILE(conn, fname, SMB_ACL_TYPE_ACCESS);
4117 if (posix_acl == (SMB_ACL_T)NULL)
4120 while (SMB_VFS_SYS_ACL_GET_ENTRY(conn, posix_acl, entry_id, &entry) == 1) {
4121 SMB_ACL_TAG_T tagtype;
4122 SMB_ACL_PERMSET_T permset;
4124 entry_id = SMB_ACL_NEXT_ENTRY;
4126 if (SMB_VFS_SYS_ACL_GET_TAG_TYPE(conn, entry, &tagtype) ==-1)
4129 if (tagtype == SMB_ACL_GROUP_OBJ) {
4130 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, entry, &permset) == -1) {
4133 *mode &= ~(S_IRGRP|S_IWGRP|S_IXGRP);
4134 *mode |= (SMB_VFS_SYS_ACL_GET_PERM(conn, permset, SMB_ACL_READ) ? S_IRGRP : 0);
4135 *mode |= (SMB_VFS_SYS_ACL_GET_PERM(conn, permset, SMB_ACL_WRITE) ? S_IWGRP : 0);
4136 *mode |= (SMB_VFS_SYS_ACL_GET_PERM(conn, permset, SMB_ACL_EXECUTE) ? S_IXGRP : 0);
4142 SMB_VFS_SYS_ACL_FREE_ACL(conn, posix_acl);
4146 /****************************************************************************
4147 Do a chmod by setting the ACL USER_OBJ, GROUP_OBJ and OTHER bits in an ACL
4148 and set the mask to rwx. Needed to preserve complex ACLs set by NT.
4149 ****************************************************************************/
4151 static int chmod_acl_internals( connection_struct *conn, SMB_ACL_T posix_acl, mode_t mode)
4153 int entry_id = SMB_ACL_FIRST_ENTRY;
4154 SMB_ACL_ENTRY_T entry;
4155 int num_entries = 0;
4157 while ( SMB_VFS_SYS_ACL_GET_ENTRY(conn, posix_acl, entry_id, &entry) == 1) {
4158 SMB_ACL_TAG_T tagtype;
4159 SMB_ACL_PERMSET_T permset;
4162 entry_id = SMB_ACL_NEXT_ENTRY;
4164 if (SMB_VFS_SYS_ACL_GET_TAG_TYPE(conn, entry, &tagtype) == -1)
4167 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, entry, &permset) == -1)
4173 case SMB_ACL_USER_OBJ:
4174 perms = unix_perms_to_acl_perms(mode, S_IRUSR, S_IWUSR, S_IXUSR);
4176 case SMB_ACL_GROUP_OBJ:
4177 perms = unix_perms_to_acl_perms(mode, S_IRGRP, S_IWGRP, S_IXGRP);
4181 * FIXME: The ACL_MASK entry permissions should really be set to
4182 * the union of the permissions of all ACL_USER,
4183 * ACL_GROUP_OBJ, and ACL_GROUP entries. That's what
4184 * acl_calc_mask() does, but Samba ACLs doesn't provide it.
4186 perms = S_IRUSR|S_IWUSR|S_IXUSR;
4189 perms = unix_perms_to_acl_perms(mode, S_IROTH, S_IWOTH, S_IXOTH);
4195 if (map_acl_perms_to_permset(conn, perms, &permset) == -1)
4198 if (SMB_VFS_SYS_ACL_SET_PERMSET(conn, entry, permset) == -1)
4203 * If this is a simple 3 element ACL or no elements then it's a standard
4204 * UNIX permission set. Just use chmod...
4207 if ((num_entries == 3) || (num_entries == 0))
4213 /****************************************************************************
4214 Get the access ACL of FROM, do a chmod by setting the ACL USER_OBJ,
4215 GROUP_OBJ and OTHER bits in an ACL and set the mask to rwx. Set the
4216 resulting ACL on TO. Note that name is in UNIX character set.
4217 ****************************************************************************/
4219 static int copy_access_posix_acl(connection_struct *conn, const char *from, const char *to, mode_t mode)
4221 SMB_ACL_T posix_acl = NULL;
4224 if ((posix_acl = SMB_VFS_SYS_ACL_GET_FILE(conn, from, SMB_ACL_TYPE_ACCESS)) == NULL)
4227 if ((ret = chmod_acl_internals(conn, posix_acl, mode)) == -1)
4230 ret = SMB_VFS_SYS_ACL_SET_FILE(conn, to, SMB_ACL_TYPE_ACCESS, posix_acl);
4234 SMB_VFS_SYS_ACL_FREE_ACL(conn, posix_acl);
4238 /****************************************************************************
4239 Do a chmod by setting the ACL USER_OBJ, GROUP_OBJ and OTHER bits in an ACL
4240 and set the mask to rwx. Needed to preserve complex ACLs set by NT.
4241 Note that name is in UNIX character set.
4242 ****************************************************************************/
4244 int chmod_acl(connection_struct *conn, const char *name, mode_t mode)
4246 return copy_access_posix_acl(conn, name, name, mode);
4249 /****************************************************************************
4250 Check for an existing default POSIX ACL on a directory.
4251 ****************************************************************************/
4253 static bool directory_has_default_posix_acl(connection_struct *conn, const char *fname)
4255 SMB_ACL_T def_acl = SMB_VFS_SYS_ACL_GET_FILE( conn, fname, SMB_ACL_TYPE_DEFAULT);
4256 bool has_acl = False;
4257 SMB_ACL_ENTRY_T entry;
4259 if (def_acl != NULL && (SMB_VFS_SYS_ACL_GET_ENTRY(conn, def_acl, SMB_ACL_FIRST_ENTRY, &entry) == 1)) {
4264 SMB_VFS_SYS_ACL_FREE_ACL(conn, def_acl);
4269 /****************************************************************************
4270 If the parent directory has no default ACL but it does have an Access ACL,
4271 inherit this Access ACL to file name.
4272 ****************************************************************************/
4274 int inherit_access_posix_acl(connection_struct *conn, const char *inherit_from_dir,
4275 const char *name, mode_t mode)
4277 if (directory_has_default_posix_acl(conn, inherit_from_dir))
4280 return copy_access_posix_acl(conn, inherit_from_dir, name, mode);
4283 /****************************************************************************
4284 Do an fchmod by setting the ACL USER_OBJ, GROUP_OBJ and OTHER bits in an ACL
4285 and set the mask to rwx. Needed to preserve complex ACLs set by NT.
4286 ****************************************************************************/
4288 int fchmod_acl(files_struct *fsp, mode_t mode)
4290 connection_struct *conn = fsp->conn;
4291 SMB_ACL_T posix_acl = NULL;
4294 if ((posix_acl = SMB_VFS_SYS_ACL_GET_FD(fsp)) == NULL)
4297 if ((ret = chmod_acl_internals(conn, posix_acl, mode)) == -1)
4300 ret = SMB_VFS_SYS_ACL_SET_FD(fsp, posix_acl);
4304 SMB_VFS_SYS_ACL_FREE_ACL(conn, posix_acl);
4308 /****************************************************************************
4309 Map from wire type to permset.
4310 ****************************************************************************/
4312 static bool unix_ex_wire_to_permset(connection_struct *conn, unsigned char wire_perm, SMB_ACL_PERMSET_T *p_permset)
4314 if (wire_perm & ~(SMB_POSIX_ACL_READ|SMB_POSIX_ACL_WRITE|SMB_POSIX_ACL_EXECUTE)) {
4318 if (SMB_VFS_SYS_ACL_CLEAR_PERMS(conn, *p_permset) == -1) {
4322 if (wire_perm & SMB_POSIX_ACL_READ) {
4323 if (SMB_VFS_SYS_ACL_ADD_PERM(conn, *p_permset, SMB_ACL_READ) == -1) {
4327 if (wire_perm & SMB_POSIX_ACL_WRITE) {
4328 if (SMB_VFS_SYS_ACL_ADD_PERM(conn, *p_permset, SMB_ACL_WRITE) == -1) {
4332 if (wire_perm & SMB_POSIX_ACL_EXECUTE) {
4333 if (SMB_VFS_SYS_ACL_ADD_PERM(conn, *p_permset, SMB_ACL_EXECUTE) == -1) {
4340 /****************************************************************************
4341 Map from wire type to tagtype.
4342 ****************************************************************************/
4344 static bool unix_ex_wire_to_tagtype(unsigned char wire_tt, SMB_ACL_TAG_T *p_tt)
4347 case SMB_POSIX_ACL_USER_OBJ:
4348 *p_tt = SMB_ACL_USER_OBJ;
4350 case SMB_POSIX_ACL_USER:
4351 *p_tt = SMB_ACL_USER;
4353 case SMB_POSIX_ACL_GROUP_OBJ:
4354 *p_tt = SMB_ACL_GROUP_OBJ;
4356 case SMB_POSIX_ACL_GROUP:
4357 *p_tt = SMB_ACL_GROUP;
4359 case SMB_POSIX_ACL_MASK:
4360 *p_tt = SMB_ACL_MASK;
4362 case SMB_POSIX_ACL_OTHER:
4363 *p_tt = SMB_ACL_OTHER;
4371 /****************************************************************************
4372 Create a new POSIX acl from wire permissions.
4373 FIXME ! How does the share mask/mode fit into this.... ?
4374 ****************************************************************************/
4376 static SMB_ACL_T create_posix_acl_from_wire(connection_struct *conn, uint16 num_acls, const char *pdata)
4379 SMB_ACL_T the_acl = SMB_VFS_SYS_ACL_INIT(conn, num_acls);
4381 if (the_acl == NULL) {
4385 for (i = 0; i < num_acls; i++) {
4386 SMB_ACL_ENTRY_T the_entry;
4387 SMB_ACL_PERMSET_T the_permset;
4388 SMB_ACL_TAG_T tag_type;
4390 if (SMB_VFS_SYS_ACL_CREATE_ENTRY(conn, &the_acl, &the_entry) == -1) {
4391 DEBUG(0,("create_posix_acl_from_wire: Failed to create entry %u. (%s)\n",
4392 i, strerror(errno) ));
4396 if (!unix_ex_wire_to_tagtype(CVAL(pdata,(i*SMB_POSIX_ACL_ENTRY_SIZE)), &tag_type)) {
4397 DEBUG(0,("create_posix_acl_from_wire: invalid wire tagtype %u on entry %u.\n",
4398 CVAL(pdata,(i*SMB_POSIX_ACL_ENTRY_SIZE)), i ));
4402 if (SMB_VFS_SYS_ACL_SET_TAG_TYPE(conn, the_entry, tag_type) == -1) {
4403 DEBUG(0,("create_posix_acl_from_wire: Failed to set tagtype on entry %u. (%s)\n",
4404 i, strerror(errno) ));
4408 /* Get the permset pointer from the new ACL entry. */
4409 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, the_entry, &the_permset) == -1) {
4410 DEBUG(0,("create_posix_acl_from_wire: Failed to get permset on entry %u. (%s)\n",
4411 i, strerror(errno) ));
4415 /* Map from wire to permissions. */
4416 if (!unix_ex_wire_to_permset(conn, CVAL(pdata,(i*SMB_POSIX_ACL_ENTRY_SIZE)+1), &the_permset)) {
4417 DEBUG(0,("create_posix_acl_from_wire: invalid permset %u on entry %u.\n",
4418 CVAL(pdata,(i*SMB_POSIX_ACL_ENTRY_SIZE) + 1), i ));
4422 /* Now apply to the new ACL entry. */
4423 if (SMB_VFS_SYS_ACL_SET_PERMSET(conn, the_entry, the_permset) == -1) {
4424 DEBUG(0,("create_posix_acl_from_wire: Failed to add permset on entry %u. (%s)\n",
4425 i, strerror(errno) ));
4429 if (tag_type == SMB_ACL_USER) {
4430 uint32 uidval = IVAL(pdata,(i*SMB_POSIX_ACL_ENTRY_SIZE)+2);
4431 uid_t uid = (uid_t)uidval;
4432 if (SMB_VFS_SYS_ACL_SET_QUALIFIER(conn, the_entry,(void *)&uid) == -1) {
4433 DEBUG(0,("create_posix_acl_from_wire: Failed to set uid %u on entry %u. (%s)\n",
4434 (unsigned int)uid, i, strerror(errno) ));
4439 if (tag_type == SMB_ACL_GROUP) {
4440 uint32 gidval = IVAL(pdata,(i*SMB_POSIX_ACL_ENTRY_SIZE)+2);
4441 gid_t gid = (uid_t)gidval;
4442 if (SMB_VFS_SYS_ACL_SET_QUALIFIER(conn, the_entry,(void *)&gid) == -1) {
4443 DEBUG(0,("create_posix_acl_from_wire: Failed to set gid %u on entry %u. (%s)\n",
4444 (unsigned int)gid, i, strerror(errno) ));
4454 if (the_acl != NULL) {
4455 SMB_VFS_SYS_ACL_FREE_ACL(conn, the_acl);
4460 /****************************************************************************
4461 Calls from UNIX extensions - Default POSIX ACL set.
4462 If num_def_acls == 0 and not a directory just return. If it is a directory
4463 and num_def_acls == 0 then remove the default acl. Else set the default acl
4465 ****************************************************************************/
4467 bool set_unix_posix_default_acl(connection_struct *conn, const char *fname, const SMB_STRUCT_STAT *psbuf,
4468 uint16 num_def_acls, const char *pdata)
4470 SMB_ACL_T def_acl = NULL;
4472 if (!S_ISDIR(psbuf->st_ex_mode)) {
4474 DEBUG(5,("set_unix_posix_default_acl: Can't set default ACL on non-directory file %s\n", fname ));
4482 if (!num_def_acls) {
4483 /* Remove the default ACL. */
4484 if (SMB_VFS_SYS_ACL_DELETE_DEF_FILE(conn, fname) == -1) {
4485 DEBUG(5,("set_unix_posix_default_acl: acl_delete_def_file failed on directory %s (%s)\n",
4486 fname, strerror(errno) ));
4492 if ((def_acl = create_posix_acl_from_wire(conn, num_def_acls, pdata)) == NULL) {
4496 if (SMB_VFS_SYS_ACL_SET_FILE(conn, fname, SMB_ACL_TYPE_DEFAULT, def_acl) == -1) {
4497 DEBUG(5,("set_unix_posix_default_acl: acl_set_file failed on directory %s (%s)\n",
4498 fname, strerror(errno) ));
4499 SMB_VFS_SYS_ACL_FREE_ACL(conn, def_acl);
4503 DEBUG(10,("set_unix_posix_default_acl: set default acl for file %s\n", fname ));
4504 SMB_VFS_SYS_ACL_FREE_ACL(conn, def_acl);
4508 /****************************************************************************
4509 Remove an ACL from a file. As we don't have acl_delete_entry() available
4510 we must read the current acl and copy all entries except MASK, USER and GROUP
4511 to a new acl, then set that. This (at least on Linux) causes any ACL to be
4513 FIXME ! How does the share mask/mode fit into this.... ?
4514 ****************************************************************************/
4516 static bool remove_posix_acl(connection_struct *conn, files_struct *fsp, const char *fname)
4518 SMB_ACL_T file_acl = NULL;
4519 int entry_id = SMB_ACL_FIRST_ENTRY;
4520 SMB_ACL_ENTRY_T entry;
4522 /* Create a new ACL with only 3 entries, u/g/w. */
4523 SMB_ACL_T new_file_acl = SMB_VFS_SYS_ACL_INIT(conn, 3);
4524 SMB_ACL_ENTRY_T user_ent = NULL;
4525 SMB_ACL_ENTRY_T group_ent = NULL;
4526 SMB_ACL_ENTRY_T other_ent = NULL;
4528 if (new_file_acl == NULL) {
4529 DEBUG(5,("remove_posix_acl: failed to init new ACL with 3 entries for file %s.\n", fname));
4533 /* Now create the u/g/w entries. */
4534 if (SMB_VFS_SYS_ACL_CREATE_ENTRY(conn, &new_file_acl, &user_ent) == -1) {
4535 DEBUG(5,("remove_posix_acl: Failed to create user entry for file %s. (%s)\n",
4536 fname, strerror(errno) ));
4539 if (SMB_VFS_SYS_ACL_SET_TAG_TYPE(conn, user_ent, SMB_ACL_USER_OBJ) == -1) {
4540 DEBUG(5,("remove_posix_acl: Failed to set user entry for file %s. (%s)\n",
4541 fname, strerror(errno) ));
4545 if (SMB_VFS_SYS_ACL_CREATE_ENTRY(conn, &new_file_acl, &group_ent) == -1) {
4546 DEBUG(5,("remove_posix_acl: Failed to create group entry for file %s. (%s)\n",
4547 fname, strerror(errno) ));
4550 if (SMB_VFS_SYS_ACL_SET_TAG_TYPE(conn, group_ent, SMB_ACL_GROUP_OBJ) == -1) {
4551 DEBUG(5,("remove_posix_acl: Failed to set group entry for file %s. (%s)\n",
4552 fname, strerror(errno) ));
4556 if (SMB_VFS_SYS_ACL_CREATE_ENTRY(conn, &new_file_acl, &other_ent) == -1) {
4557 DEBUG(5,("remove_posix_acl: Failed to create other entry for file %s. (%s)\n",
4558 fname, strerror(errno) ));
4561 if (SMB_VFS_SYS_ACL_SET_TAG_TYPE(conn, other_ent, SMB_ACL_OTHER) == -1) {
4562 DEBUG(5,("remove_posix_acl: Failed to set other entry for file %s. (%s)\n",
4563 fname, strerror(errno) ));
4567 /* Get the current file ACL. */
4568 if (fsp && fsp->fh->fd != -1) {
4569 file_acl = SMB_VFS_SYS_ACL_GET_FD(fsp);
4571 file_acl = SMB_VFS_SYS_ACL_GET_FILE( conn, fname, SMB_ACL_TYPE_ACCESS);
4574 if (file_acl == NULL) {
4575 /* This is only returned if an error occurred. Even for a file with
4576 no acl a u/g/w acl should be returned. */
4577 DEBUG(5,("remove_posix_acl: failed to get ACL from file %s (%s).\n",
4578 fname, strerror(errno) ));
4582 while ( SMB_VFS_SYS_ACL_GET_ENTRY(conn, file_acl, entry_id, &entry) == 1) {
4583 SMB_ACL_TAG_T tagtype;
4584 SMB_ACL_PERMSET_T permset;
4586 entry_id = SMB_ACL_NEXT_ENTRY;
4588 if (SMB_VFS_SYS_ACL_GET_TAG_TYPE(conn, entry, &tagtype) == -1) {
4589 DEBUG(5,("remove_posix_acl: failed to get tagtype from ACL on file %s (%s).\n",
4590 fname, strerror(errno) ));
4594 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, entry, &permset) == -1) {
4595 DEBUG(5,("remove_posix_acl: failed to get permset from ACL on file %s (%s).\n",
4596 fname, strerror(errno) ));
4600 if (tagtype == SMB_ACL_USER_OBJ) {
4601 if (SMB_VFS_SYS_ACL_SET_PERMSET(conn, user_ent, permset) == -1) {
4602 DEBUG(5,("remove_posix_acl: failed to set permset from ACL on file %s (%s).\n",
4603 fname, strerror(errno) ));
4605 } else if (tagtype == SMB_ACL_GROUP_OBJ) {
4606 if (SMB_VFS_SYS_ACL_SET_PERMSET(conn, group_ent, permset) == -1) {
4607 DEBUG(5,("remove_posix_acl: failed to set permset from ACL on file %s (%s).\n",
4608 fname, strerror(errno) ));
4610 } else if (tagtype == SMB_ACL_OTHER) {
4611 if (SMB_VFS_SYS_ACL_SET_PERMSET(conn, other_ent, permset) == -1) {
4612 DEBUG(5,("remove_posix_acl: failed to set permset from ACL on file %s (%s).\n",
4613 fname, strerror(errno) ));
4618 /* Set the new empty file ACL. */
4619 if (fsp && fsp->fh->fd != -1) {
4620 if (SMB_VFS_SYS_ACL_SET_FD(fsp, new_file_acl) == -1) {
4621 DEBUG(5,("remove_posix_acl: acl_set_file failed on %s (%s)\n",
4622 fname, strerror(errno) ));
4626 if (SMB_VFS_SYS_ACL_SET_FILE(conn, fname, SMB_ACL_TYPE_ACCESS, new_file_acl) == -1) {
4627 DEBUG(5,("remove_posix_acl: acl_set_file failed on %s (%s)\n",
4628 fname, strerror(errno) ));
4638 SMB_VFS_SYS_ACL_FREE_ACL(conn, file_acl);
4641 SMB_VFS_SYS_ACL_FREE_ACL(conn, new_file_acl);
4646 /****************************************************************************
4647 Calls from UNIX extensions - POSIX ACL set.
4648 If num_def_acls == 0 then read/modify/write acl after removing all entries
4649 except SMB_ACL_USER_OBJ, SMB_ACL_GROUP_OBJ, SMB_ACL_OTHER.
4650 ****************************************************************************/
4652 bool set_unix_posix_acl(connection_struct *conn, files_struct *fsp, const char *fname, uint16 num_acls, const char *pdata)
4654 SMB_ACL_T file_acl = NULL;
4657 /* Remove the ACL from the file. */
4658 return remove_posix_acl(conn, fsp, fname);
4661 if ((file_acl = create_posix_acl_from_wire(conn, num_acls, pdata)) == NULL) {
4665 if (fsp && fsp->fh->fd != -1) {
4666 /* The preferred way - use an open fd. */
4667 if (SMB_VFS_SYS_ACL_SET_FD(fsp, file_acl) == -1) {
4668 DEBUG(5,("set_unix_posix_acl: acl_set_file failed on %s (%s)\n",
4669 fname, strerror(errno) ));
4670 SMB_VFS_SYS_ACL_FREE_ACL(conn, file_acl);
4674 if (SMB_VFS_SYS_ACL_SET_FILE(conn, fname, SMB_ACL_TYPE_ACCESS, file_acl) == -1) {
4675 DEBUG(5,("set_unix_posix_acl: acl_set_file failed on %s (%s)\n",
4676 fname, strerror(errno) ));
4677 SMB_VFS_SYS_ACL_FREE_ACL(conn, file_acl);
4682 DEBUG(10,("set_unix_posix_acl: set acl for file %s\n", fname ));
4683 SMB_VFS_SYS_ACL_FREE_ACL(conn, file_acl);
4687 /********************************************************************
4688 Pull the NT ACL from a file on disk or the OpenEventlog() access
4689 check. Caller is responsible for freeing the returned security
4690 descriptor via TALLOC_FREE(). This is designed for dealing with
4691 user space access checks in smbd outside of the VFS. For example,
4692 checking access rights in OpenEventlog().
4694 Assume we are dealing with files (for now)
4695 ********************************************************************/
4697 SEC_DESC *get_nt_acl_no_snum( TALLOC_CTX *ctx, const char *fname)
4699 SEC_DESC *psd, *ret_sd;
4700 connection_struct *conn;
4702 struct fd_handle fh;
4705 conn = TALLOC_ZERO_P(ctx, connection_struct);
4707 DEBUG(0, ("talloc failed\n"));
4711 if (!(conn->params = TALLOC_P(conn, struct share_params))) {
4712 DEBUG(0,("get_nt_acl_no_snum: talloc() failed!\n"));
4717 conn->params->service = -1;
4719 set_conn_connectpath(conn, "/");
4721 if (!smbd_vfs_init(conn)) {
4722 DEBUG(0,("get_nt_acl_no_snum: Unable to create a fake connection struct!\n"));
4727 ZERO_STRUCT( finfo );
4735 status = create_synthetic_smb_fname(talloc_tos(), fname, NULL, NULL,
4737 if (!NT_STATUS_IS_OK(status)) {
4742 if (!NT_STATUS_IS_OK(SMB_VFS_FGET_NT_ACL( &finfo, DACL_SECURITY_INFORMATION, &psd))) {
4743 DEBUG(0,("get_nt_acl_no_snum: get_nt_acl returned zero.\n"));
4744 TALLOC_FREE(finfo.fsp_name);
4749 ret_sd = dup_sec_desc( ctx, psd );
4751 TALLOC_FREE(finfo.fsp_name);