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 );
1112 if ((perms & S_IWUSR) && lp_dos_filemode(snum)) {
1113 nt_mask |= (SEC_STD_WRITE_DAC|SEC_STD_WRITE_OWNER|DELETE_ACCESS);
1116 DEBUG(10,("map_canon_ace_perms: Mapped (UNIX) %x to (NT) %x\n",
1117 (unsigned int)perms, (unsigned int)nt_mask ));
1122 /****************************************************************************
1123 Map NT perms to a UNIX mode_t.
1124 ****************************************************************************/
1126 #define FILE_SPECIFIC_READ_BITS (FILE_READ_DATA|FILE_READ_EA)
1127 #define FILE_SPECIFIC_WRITE_BITS (FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_WRITE_EA)
1128 #define FILE_SPECIFIC_EXECUTE_BITS (FILE_EXECUTE)
1130 static mode_t map_nt_perms( uint32 *mask, int type)
1136 if((*mask) & GENERIC_ALL_ACCESS)
1137 mode = S_IRUSR|S_IWUSR|S_IXUSR;
1139 mode |= ((*mask) & (GENERIC_READ_ACCESS|FILE_SPECIFIC_READ_BITS)) ? S_IRUSR : 0;
1140 mode |= ((*mask) & (GENERIC_WRITE_ACCESS|FILE_SPECIFIC_WRITE_BITS)) ? S_IWUSR : 0;
1141 mode |= ((*mask) & (GENERIC_EXECUTE_ACCESS|FILE_SPECIFIC_EXECUTE_BITS)) ? S_IXUSR : 0;
1145 if((*mask) & GENERIC_ALL_ACCESS)
1146 mode = S_IRGRP|S_IWGRP|S_IXGRP;
1148 mode |= ((*mask) & (GENERIC_READ_ACCESS|FILE_SPECIFIC_READ_BITS)) ? S_IRGRP : 0;
1149 mode |= ((*mask) & (GENERIC_WRITE_ACCESS|FILE_SPECIFIC_WRITE_BITS)) ? S_IWGRP : 0;
1150 mode |= ((*mask) & (GENERIC_EXECUTE_ACCESS|FILE_SPECIFIC_EXECUTE_BITS)) ? S_IXGRP : 0;
1154 if((*mask) & GENERIC_ALL_ACCESS)
1155 mode = S_IROTH|S_IWOTH|S_IXOTH;
1157 mode |= ((*mask) & (GENERIC_READ_ACCESS|FILE_SPECIFIC_READ_BITS)) ? S_IROTH : 0;
1158 mode |= ((*mask) & (GENERIC_WRITE_ACCESS|FILE_SPECIFIC_WRITE_BITS)) ? S_IWOTH : 0;
1159 mode |= ((*mask) & (GENERIC_EXECUTE_ACCESS|FILE_SPECIFIC_EXECUTE_BITS)) ? S_IXOTH : 0;
1167 /****************************************************************************
1168 Unpack a SEC_DESC into a UNIX owner and group.
1169 ****************************************************************************/
1171 NTSTATUS unpack_nt_owners(int snum, uid_t *puser, gid_t *pgrp, uint32 security_info_sent, const SEC_DESC *psd)
1179 if(security_info_sent == 0) {
1180 DEBUG(0,("unpack_nt_owners: no security info sent !\n"));
1181 return NT_STATUS_OK;
1185 * Validate the owner and group SID's.
1188 memset(&owner_sid, '\0', sizeof(owner_sid));
1189 memset(&grp_sid, '\0', sizeof(grp_sid));
1191 DEBUG(5,("unpack_nt_owners: validating owner_sids.\n"));
1194 * Don't immediately fail if the owner sid cannot be validated.
1195 * This may be a group chown only set.
1198 if (security_info_sent & OWNER_SECURITY_INFORMATION) {
1199 sid_copy(&owner_sid, psd->owner_sid);
1200 if (!sid_to_uid(&owner_sid, puser)) {
1201 if (lp_force_unknown_acl_user(snum)) {
1202 /* this allows take ownership to work
1204 *puser = current_user.ut.uid;
1206 DEBUG(3,("unpack_nt_owners: unable to validate"
1207 " owner sid for %s\n",
1208 sid_string_dbg(&owner_sid)));
1209 return NT_STATUS_INVALID_OWNER;
1212 DEBUG(3,("unpack_nt_owners: owner sid mapped to uid %u\n",
1213 (unsigned int)*puser ));
1217 * Don't immediately fail if the group sid cannot be validated.
1218 * This may be an owner chown only set.
1221 if (security_info_sent & GROUP_SECURITY_INFORMATION) {
1222 sid_copy(&grp_sid, psd->group_sid);
1223 if (!sid_to_gid( &grp_sid, pgrp)) {
1224 if (lp_force_unknown_acl_user(snum)) {
1225 /* this allows take group ownership to work
1227 *pgrp = current_user.ut.gid;
1229 DEBUG(3,("unpack_nt_owners: unable to validate"
1231 return NT_STATUS_INVALID_OWNER;
1234 DEBUG(3,("unpack_nt_owners: group sid mapped to gid %u\n",
1235 (unsigned int)*pgrp));
1238 DEBUG(5,("unpack_nt_owners: owner_sids validated.\n"));
1240 return NT_STATUS_OK;
1243 /****************************************************************************
1244 Ensure the enforced permissions for this share apply.
1245 ****************************************************************************/
1247 static void apply_default_perms(const struct share_params *params,
1248 const bool is_directory, canon_ace *pace,
1251 mode_t and_bits = (mode_t)0;
1252 mode_t or_bits = (mode_t)0;
1254 /* Get the initial bits to apply. */
1257 and_bits = lp_dir_security_mask(params->service);
1258 or_bits = lp_force_dir_security_mode(params->service);
1260 and_bits = lp_security_mask(params->service);
1261 or_bits = lp_force_security_mode(params->service);
1264 /* Now bounce them into the S_USR space. */
1267 /* Ensure owner has read access. */
1268 pace->perms |= S_IRUSR;
1270 pace->perms |= (S_IWUSR|S_IXUSR);
1271 and_bits = unix_perms_to_acl_perms(and_bits, S_IRUSR, S_IWUSR, S_IXUSR);
1272 or_bits = unix_perms_to_acl_perms(or_bits, S_IRUSR, S_IWUSR, S_IXUSR);
1275 and_bits = unix_perms_to_acl_perms(and_bits, S_IRGRP, S_IWGRP, S_IXGRP);
1276 or_bits = unix_perms_to_acl_perms(or_bits, S_IRGRP, S_IWGRP, S_IXGRP);
1279 and_bits = unix_perms_to_acl_perms(and_bits, S_IROTH, S_IWOTH, S_IXOTH);
1280 or_bits = unix_perms_to_acl_perms(or_bits, S_IROTH, S_IWOTH, S_IXOTH);
1284 pace->perms = ((pace->perms & and_bits)|or_bits);
1287 /****************************************************************************
1288 Check if a given uid/SID is in a group gid/SID. This is probably very
1289 expensive and will need optimisation. A *lot* of optimisation :-). JRA.
1290 ****************************************************************************/
1292 static bool uid_entry_in_group( canon_ace *uid_ace, canon_ace *group_ace )
1294 const char *u_name = NULL;
1296 /* "Everyone" always matches every uid. */
1298 if (sid_equal(&group_ace->trustee, &global_sid_World))
1302 * if it's the current user, we already have the unix token
1303 * and don't need to do the complex user_in_group_sid() call
1305 if (uid_ace->unix_ug.uid == current_user.ut.uid) {
1308 if (group_ace->unix_ug.gid == current_user.ut.gid) {
1312 for (i=0; i < current_user.ut.ngroups; i++) {
1313 if (group_ace->unix_ug.gid == current_user.ut.groups[i]) {
1319 /* u_name talloc'ed off tos. */
1320 u_name = uidtoname(uid_ace->unix_ug.uid);
1326 * user_in_group_sid() uses create_token_from_username()
1327 * which creates an artificial NT token given just a username,
1328 * so this is not reliable for users from foreign domains
1329 * exported by winbindd!
1331 return user_in_group_sid(u_name, &group_ace->trustee);
1334 /****************************************************************************
1335 A well formed POSIX file or default ACL has at least 3 entries, a
1336 SMB_ACL_USER_OBJ, SMB_ACL_GROUP_OBJ, SMB_ACL_OTHER_OBJ.
1337 In addition, the owner must always have at least read access.
1338 When using this call on get_acl, the pst struct is valid and contains
1339 the mode of the file. When using this call on set_acl, the pst struct has
1340 been modified to have a mode containing the default for this file or directory
1342 ****************************************************************************/
1344 static bool ensure_canon_entry_valid(canon_ace **pp_ace,
1345 bool is_default_acl,
1346 const struct share_params *params,
1347 const bool is_directory,
1348 const DOM_SID *pfile_owner_sid,
1349 const DOM_SID *pfile_grp_sid,
1350 const SMB_STRUCT_STAT *pst,
1354 bool got_user = False;
1355 bool got_grp = False;
1356 bool got_other = False;
1357 canon_ace *pace_other = NULL;
1359 for (pace = *pp_ace; pace; pace = pace->next) {
1360 if (pace->type == SMB_ACL_USER_OBJ) {
1362 if (setting_acl && !is_default_acl) {
1363 apply_default_perms(params, is_directory, pace, S_IRUSR);
1367 } else if (pace->type == SMB_ACL_GROUP_OBJ) {
1370 * Ensure create mask/force create mode is respected on set.
1373 if (setting_acl && !is_default_acl) {
1374 apply_default_perms(params, is_directory, pace, S_IRGRP);
1378 } else if (pace->type == SMB_ACL_OTHER) {
1381 * Ensure create mask/force create mode is respected on set.
1384 if (setting_acl && !is_default_acl) {
1385 apply_default_perms(params, is_directory, pace, S_IROTH);
1393 if ((pace = SMB_MALLOC_P(canon_ace)) == NULL) {
1394 DEBUG(0,("ensure_canon_entry_valid: malloc fail.\n"));
1399 pace->type = SMB_ACL_USER_OBJ;
1400 pace->owner_type = UID_ACE;
1401 pace->unix_ug.uid = pst->st_ex_uid;
1402 pace->trustee = *pfile_owner_sid;
1403 pace->attr = ALLOW_ACE;
1404 /* Start with existing permissions, principle of least
1405 surprises for the user. */
1406 pace->perms = pst->st_ex_mode;
1409 /* See if the owning user is in any of the other groups in
1410 the ACE, or if there's a matching user entry.
1411 If so, OR in the permissions from that entry. */
1413 canon_ace *pace_iter;
1415 for (pace_iter = *pp_ace; pace_iter; pace_iter = pace_iter->next) {
1416 if (pace_iter->type == SMB_ACL_USER &&
1417 pace_iter->unix_ug.uid == pace->unix_ug.uid) {
1418 pace->perms |= pace_iter->perms;
1419 } else if (pace_iter->type == SMB_ACL_GROUP_OBJ || pace_iter->type == SMB_ACL_GROUP) {
1420 if (uid_entry_in_group(pace, pace_iter)) {
1421 pace->perms |= pace_iter->perms;
1426 if (pace->perms == 0) {
1427 /* If we only got an "everyone" perm, just use that. */
1429 pace->perms = pace_other->perms;
1432 if (!is_default_acl) {
1433 apply_default_perms(params, is_directory, pace, S_IRUSR);
1436 pace->perms = unix_perms_to_acl_perms(pst->st_ex_mode, S_IRUSR, S_IWUSR, S_IXUSR);
1439 DLIST_ADD(*pp_ace, pace);
1443 if ((pace = SMB_MALLOC_P(canon_ace)) == NULL) {
1444 DEBUG(0,("ensure_canon_entry_valid: malloc fail.\n"));
1449 pace->type = SMB_ACL_GROUP_OBJ;
1450 pace->owner_type = GID_ACE;
1451 pace->unix_ug.uid = pst->st_ex_gid;
1452 pace->trustee = *pfile_grp_sid;
1453 pace->attr = ALLOW_ACE;
1455 /* If we only got an "everyone" perm, just use that. */
1457 pace->perms = pace_other->perms;
1460 if (!is_default_acl) {
1461 apply_default_perms(params, is_directory, pace, S_IRGRP);
1464 pace->perms = unix_perms_to_acl_perms(pst->st_ex_mode, S_IRGRP, S_IWGRP, S_IXGRP);
1467 DLIST_ADD(*pp_ace, pace);
1471 if ((pace = SMB_MALLOC_P(canon_ace)) == NULL) {
1472 DEBUG(0,("ensure_canon_entry_valid: malloc fail.\n"));
1477 pace->type = SMB_ACL_OTHER;
1478 pace->owner_type = WORLD_ACE;
1479 pace->unix_ug.world = -1;
1480 pace->trustee = global_sid_World;
1481 pace->attr = ALLOW_ACE;
1484 if (!is_default_acl) {
1485 apply_default_perms(params, is_directory, pace, S_IROTH);
1488 pace->perms = unix_perms_to_acl_perms(pst->st_ex_mode, S_IROTH, S_IWOTH, S_IXOTH);
1490 DLIST_ADD(*pp_ace, pace);
1496 /****************************************************************************
1497 Check if a POSIX ACL has the required SMB_ACL_USER_OBJ and SMB_ACL_GROUP_OBJ entries.
1498 If it does not have them, check if there are any entries where the trustee is the
1499 file owner or the owning group, and map these to SMB_ACL_USER_OBJ and SMB_ACL_GROUP_OBJ.
1500 Note we must not do this to default directory ACLs.
1501 ****************************************************************************/
1503 static void check_owning_objs(canon_ace *ace, DOM_SID *pfile_owner_sid, DOM_SID *pfile_grp_sid)
1505 bool got_user_obj, got_group_obj;
1506 canon_ace *current_ace;
1509 entries = count_canon_ace_list(ace);
1510 got_user_obj = False;
1511 got_group_obj = False;
1513 for (i=0, current_ace = ace; i < entries; i++, current_ace = current_ace->next) {
1514 if (current_ace->type == SMB_ACL_USER_OBJ)
1515 got_user_obj = True;
1516 else if (current_ace->type == SMB_ACL_GROUP_OBJ)
1517 got_group_obj = True;
1519 if (got_user_obj && got_group_obj) {
1520 DEBUG(10,("check_owning_objs: ACL had owning user/group entries.\n"));
1524 for (i=0, current_ace = ace; i < entries; i++, current_ace = current_ace->next) {
1525 if (!got_user_obj && current_ace->owner_type == UID_ACE &&
1526 sid_equal(¤t_ace->trustee, pfile_owner_sid)) {
1527 current_ace->type = SMB_ACL_USER_OBJ;
1528 got_user_obj = True;
1530 if (!got_group_obj && current_ace->owner_type == GID_ACE &&
1531 sid_equal(¤t_ace->trustee, pfile_grp_sid)) {
1532 current_ace->type = SMB_ACL_GROUP_OBJ;
1533 got_group_obj = True;
1537 DEBUG(10,("check_owning_objs: ACL is missing an owner entry.\n"));
1539 DEBUG(10,("check_owning_objs: ACL is missing an owning group entry.\n"));
1542 /****************************************************************************
1543 Unpack a SEC_DESC into two canonical ace lists.
1544 ****************************************************************************/
1546 static bool create_canon_ace_lists(files_struct *fsp,
1547 const SMB_STRUCT_STAT *pst,
1548 DOM_SID *pfile_owner_sid,
1549 DOM_SID *pfile_grp_sid,
1550 canon_ace **ppfile_ace,
1551 canon_ace **ppdir_ace,
1552 const SEC_ACL *dacl)
1554 bool all_aces_are_inherit_only = (fsp->is_directory ? True : False);
1555 canon_ace *file_ace = NULL;
1556 canon_ace *dir_ace = NULL;
1557 canon_ace *current_ace = NULL;
1558 bool got_dir_allow = False;
1559 bool got_file_allow = False;
1566 * Convert the incoming ACL into a more regular form.
1569 for(i = 0; i < dacl->num_aces; i++) {
1570 SEC_ACE *psa = &dacl->aces[i];
1572 if((psa->type != SEC_ACE_TYPE_ACCESS_ALLOWED) && (psa->type != SEC_ACE_TYPE_ACCESS_DENIED)) {
1573 DEBUG(3,("create_canon_ace_lists: unable to set anything but an ALLOW or DENY ACE.\n"));
1577 if (nt4_compatible_acls()) {
1579 * The security mask may be UNIX_ACCESS_NONE which should map into
1580 * no permissions (we overload the WRITE_OWNER bit for this) or it
1581 * should be one of the ALL/EXECUTE/READ/WRITE bits. Arrange for this
1582 * to be so. Any other bits override the UNIX_ACCESS_NONE bit.
1586 * Convert GENERIC bits to specific bits.
1589 se_map_generic(&psa->access_mask, &file_generic_mapping);
1591 psa->access_mask &= (UNIX_ACCESS_NONE|FILE_ALL_ACCESS);
1593 if(psa->access_mask != UNIX_ACCESS_NONE)
1594 psa->access_mask &= ~UNIX_ACCESS_NONE;
1599 * Deal with the fact that NT 4.x re-writes the canonical format
1600 * that we return for default ACLs. If a directory ACE is identical
1601 * to a inherited directory ACE then NT changes the bits so that the
1602 * first ACE is set to OI|IO and the second ACE for this SID is set
1603 * to CI. We need to repair this. JRA.
1606 for(i = 0; i < dacl->num_aces; i++) {
1607 SEC_ACE *psa1 = &dacl->aces[i];
1609 for (j = i + 1; j < dacl->num_aces; j++) {
1610 SEC_ACE *psa2 = &dacl->aces[j];
1612 if (psa1->access_mask != psa2->access_mask)
1615 if (!sid_equal(&psa1->trustee, &psa2->trustee))
1619 * Ok - permission bits and SIDs are equal.
1620 * Check if flags were re-written.
1623 if (psa1->flags & SEC_ACE_FLAG_INHERIT_ONLY) {
1625 psa1->flags |= (psa2->flags & (SEC_ACE_FLAG_CONTAINER_INHERIT|SEC_ACE_FLAG_OBJECT_INHERIT));
1626 psa2->flags &= ~(SEC_ACE_FLAG_CONTAINER_INHERIT|SEC_ACE_FLAG_OBJECT_INHERIT);
1628 } else if (psa2->flags & SEC_ACE_FLAG_INHERIT_ONLY) {
1630 psa2->flags |= (psa1->flags & (SEC_ACE_FLAG_CONTAINER_INHERIT|SEC_ACE_FLAG_OBJECT_INHERIT));
1631 psa1->flags &= ~(SEC_ACE_FLAG_CONTAINER_INHERIT|SEC_ACE_FLAG_OBJECT_INHERIT);
1637 for(i = 0; i < dacl->num_aces; i++) {
1638 SEC_ACE *psa = &dacl->aces[i];
1641 * Create a cannon_ace entry representing this NT DACL ACE.
1644 if ((current_ace = SMB_MALLOC_P(canon_ace)) == NULL) {
1645 free_canon_ace_list(file_ace);
1646 free_canon_ace_list(dir_ace);
1647 DEBUG(0,("create_canon_ace_lists: malloc fail.\n"));
1651 ZERO_STRUCTP(current_ace);
1653 sid_copy(¤t_ace->trustee, &psa->trustee);
1656 * Try and work out if the SID is a user or group
1657 * as we need to flag these differently for POSIX.
1658 * Note what kind of a POSIX ACL this should map to.
1661 if( sid_equal(¤t_ace->trustee, &global_sid_World)) {
1662 current_ace->owner_type = WORLD_ACE;
1663 current_ace->unix_ug.world = -1;
1664 current_ace->type = SMB_ACL_OTHER;
1665 } else if (sid_equal(¤t_ace->trustee, &global_sid_Creator_Owner)) {
1666 current_ace->owner_type = UID_ACE;
1667 current_ace->unix_ug.uid = pst->st_ex_uid;
1668 current_ace->type = SMB_ACL_USER_OBJ;
1671 * The Creator Owner entry only specifies inheritable permissions,
1672 * never access permissions. WinNT doesn't always set the ACE to
1673 * INHERIT_ONLY, though.
1676 psa->flags |= SEC_ACE_FLAG_INHERIT_ONLY;
1678 } else if (sid_equal(¤t_ace->trustee, &global_sid_Creator_Group)) {
1679 current_ace->owner_type = GID_ACE;
1680 current_ace->unix_ug.gid = pst->st_ex_gid;
1681 current_ace->type = SMB_ACL_GROUP_OBJ;
1684 * The Creator Group entry only specifies inheritable permissions,
1685 * never access permissions. WinNT doesn't always set the ACE to
1686 * INHERIT_ONLY, though.
1688 psa->flags |= SEC_ACE_FLAG_INHERIT_ONLY;
1690 } else if (sid_to_uid( ¤t_ace->trustee, ¤t_ace->unix_ug.uid)) {
1691 current_ace->owner_type = UID_ACE;
1692 /* If it's the owning user, this is a user_obj, not
1694 if (current_ace->unix_ug.uid == pst->st_ex_uid) {
1695 current_ace->type = SMB_ACL_USER_OBJ;
1697 current_ace->type = SMB_ACL_USER;
1699 } else if (sid_to_gid( ¤t_ace->trustee, ¤t_ace->unix_ug.gid)) {
1700 current_ace->owner_type = GID_ACE;
1701 /* If it's the primary group, this is a group_obj, not
1703 if (current_ace->unix_ug.gid == pst->st_ex_gid) {
1704 current_ace->type = SMB_ACL_GROUP_OBJ;
1706 current_ace->type = SMB_ACL_GROUP;
1710 * Silently ignore map failures in non-mappable SIDs (NT Authority, BUILTIN etc).
1713 if (non_mappable_sid(&psa->trustee)) {
1714 DEBUG(10, ("create_canon_ace_lists: ignoring "
1715 "non-mappable SID %s\n",
1716 sid_string_dbg(&psa->trustee)));
1717 SAFE_FREE(current_ace);
1721 if (lp_force_unknown_acl_user(SNUM(fsp->conn))) {
1722 DEBUG(10, ("create_canon_ace_lists: ignoring "
1723 "unknown or foreign SID %s\n",
1724 sid_string_dbg(&psa->trustee)));
1725 SAFE_FREE(current_ace);
1729 free_canon_ace_list(file_ace);
1730 free_canon_ace_list(dir_ace);
1731 DEBUG(0, ("create_canon_ace_lists: unable to map SID "
1732 "%s to uid or gid.\n",
1733 sid_string_dbg(¤t_ace->trustee)));
1734 SAFE_FREE(current_ace);
1739 * Map the given NT permissions into a UNIX mode_t containing only
1740 * S_I(R|W|X)USR bits.
1743 current_ace->perms |= map_nt_perms( &psa->access_mask, S_IRUSR);
1744 current_ace->attr = (psa->type == SEC_ACE_TYPE_ACCESS_ALLOWED) ? ALLOW_ACE : DENY_ACE;
1746 /* Store the ace_flag. */
1747 current_ace->ace_flags = psa->flags;
1750 * Now add the created ace to either the file list, the directory
1751 * list, or both. We *MUST* preserve the order here (hence we use
1752 * DLIST_ADD_END) as NT ACLs are order dependent.
1755 if (fsp->is_directory) {
1758 * We can only add to the default POSIX ACE list if the ACE is
1759 * designed to be inherited by both files and directories.
1762 if ((psa->flags & (SEC_ACE_FLAG_OBJECT_INHERIT|SEC_ACE_FLAG_CONTAINER_INHERIT)) ==
1763 (SEC_ACE_FLAG_OBJECT_INHERIT|SEC_ACE_FLAG_CONTAINER_INHERIT)) {
1765 canon_ace *current_dir_ace = current_ace;
1766 DLIST_ADD_END(dir_ace, current_ace, canon_ace *);
1769 * Note if this was an allow ace. We can't process
1770 * any further deny ace's after this.
1773 if (current_ace->attr == ALLOW_ACE)
1774 got_dir_allow = True;
1776 if ((current_ace->attr == DENY_ACE) && got_dir_allow) {
1777 DEBUG(0,("create_canon_ace_lists: "
1779 "inheritable ACL! Deny entry "
1780 "after Allow entry. Failing "
1781 "to set on file %s.\n",
1783 free_canon_ace_list(file_ace);
1784 free_canon_ace_list(dir_ace);
1788 if( DEBUGLVL( 10 )) {
1789 dbgtext("create_canon_ace_lists: adding dir ACL:\n");
1790 print_canon_ace( current_ace, 0);
1794 * If this is not an inherit only ACE we need to add a duplicate
1798 if (!(psa->flags & SEC_ACE_FLAG_INHERIT_ONLY)) {
1799 canon_ace *dup_ace = dup_canon_ace(current_ace);
1802 DEBUG(0,("create_canon_ace_lists: malloc fail !\n"));
1803 free_canon_ace_list(file_ace);
1804 free_canon_ace_list(dir_ace);
1809 * We must not free current_ace here as its
1810 * pointer is now owned by the dir_ace list.
1812 current_ace = dup_ace;
1813 /* We've essentially split this ace into two,
1814 * and added the ace with inheritance request
1815 * bits to the directory ACL. Drop those bits for
1816 * the ACE we're adding to the file list. */
1817 current_ace->ace_flags &= ~(SEC_ACE_FLAG_OBJECT_INHERIT|
1818 SEC_ACE_FLAG_CONTAINER_INHERIT|
1819 SEC_ACE_FLAG_INHERIT_ONLY);
1822 * We must not free current_ace here as its
1823 * pointer is now owned by the dir_ace list.
1829 * current_ace is now either owned by file_ace
1830 * or is NULL. We can safely operate on current_dir_ace
1831 * to treat mapping for default acl entries differently
1832 * than access acl entries.
1835 if (current_dir_ace->owner_type == UID_ACE) {
1837 * We already decided above this is a uid,
1838 * for default acls ace's only CREATOR_OWNER
1839 * maps to ACL_USER_OBJ. All other uid
1840 * ace's are ACL_USER.
1842 if (sid_equal(¤t_dir_ace->trustee,
1843 &global_sid_Creator_Owner)) {
1844 current_dir_ace->type = SMB_ACL_USER_OBJ;
1846 current_dir_ace->type = SMB_ACL_USER;
1850 if (current_dir_ace->owner_type == GID_ACE) {
1852 * We already decided above this is a gid,
1853 * for default acls ace's only CREATOR_GROUP
1854 * maps to ACL_GROUP_OBJ. All other uid
1855 * ace's are ACL_GROUP.
1857 if (sid_equal(¤t_dir_ace->trustee,
1858 &global_sid_Creator_Group)) {
1859 current_dir_ace->type = SMB_ACL_GROUP_OBJ;
1861 current_dir_ace->type = SMB_ACL_GROUP;
1868 * Only add to the file ACL if not inherit only.
1871 if (current_ace && !(psa->flags & SEC_ACE_FLAG_INHERIT_ONLY)) {
1872 DLIST_ADD_END(file_ace, current_ace, canon_ace *);
1875 * Note if this was an allow ace. We can't process
1876 * any further deny ace's after this.
1879 if (current_ace->attr == ALLOW_ACE)
1880 got_file_allow = True;
1882 if ((current_ace->attr == DENY_ACE) && got_file_allow) {
1883 DEBUG(0,("create_canon_ace_lists: malformed "
1884 "ACL in file ACL ! Deny entry after "
1885 "Allow entry. Failing to set on file "
1886 "%s.\n", fsp_str_dbg(fsp)));
1887 free_canon_ace_list(file_ace);
1888 free_canon_ace_list(dir_ace);
1892 if( DEBUGLVL( 10 )) {
1893 dbgtext("create_canon_ace_lists: adding file ACL:\n");
1894 print_canon_ace( current_ace, 0);
1896 all_aces_are_inherit_only = False;
1898 * We must not free current_ace here as its
1899 * pointer is now owned by the file_ace list.
1905 * Free if ACE was not added.
1908 SAFE_FREE(current_ace);
1911 if (fsp->is_directory && all_aces_are_inherit_only) {
1913 * Windows 2000 is doing one of these weird 'inherit acl'
1914 * traverses to conserve NTFS ACL resources. Just pretend
1915 * there was no DACL sent. JRA.
1918 DEBUG(10,("create_canon_ace_lists: Win2k inherit acl traverse. Ignoring DACL.\n"));
1919 free_canon_ace_list(file_ace);
1920 free_canon_ace_list(dir_ace);
1925 * Check if we have SMB_ACL_USER_OBJ and SMB_ACL_GROUP_OBJ entries in
1926 * the file ACL. If we don't have them, check if any SMB_ACL_USER/SMB_ACL_GROUP
1927 * entries can be converted to *_OBJ. Don't do this for the default
1928 * ACL, we will create them separately for this if needed inside
1929 * ensure_canon_entry_valid().
1932 check_owning_objs(file_ace, pfile_owner_sid, pfile_grp_sid);
1936 *ppfile_ace = file_ace;
1937 *ppdir_ace = dir_ace;
1942 /****************************************************************************
1943 ASCII art time again... JRA :-).
1945 We have 4 cases to process when moving from an NT ACL to a POSIX ACL. Firstly,
1946 we insist the ACL is in canonical form (ie. all DENY entries preceede ALLOW
1947 entries). Secondly, the merge code has ensured that all duplicate SID entries for
1948 allow or deny have been merged, so the same SID can only appear once in the deny
1949 list or once in the allow list.
1951 We then process as follows :
1953 ---------------------------------------------------------------------------
1954 First pass - look for a Everyone DENY entry.
1956 If it is deny all (rwx) trunate the list at this point.
1957 Else, walk the list from this point and use the deny permissions of this
1958 entry as a mask on all following allow entries. Finally, delete
1959 the Everyone DENY entry (we have applied it to everything possible).
1961 In addition, in this pass we remove any DENY entries that have
1962 no permissions (ie. they are a DENY nothing).
1963 ---------------------------------------------------------------------------
1964 Second pass - only deal with deny user entries.
1966 DENY user1 (perms XXX)
1969 for all following allow group entries where user1 is in group
1970 new_perms |= group_perms;
1972 user1 entry perms = new_perms & ~ XXX;
1974 Convert the deny entry to an allow entry with the new perms and
1975 push to the end of the list. Note if the user was in no groups
1976 this maps to a specific allow nothing entry for this user.
1978 The common case from the NT ACL choser (userX deny all) is
1979 optimised so we don't do the group lookup - we just map to
1980 an allow nothing entry.
1982 What we're doing here is inferring the allow permissions the
1983 person setting the ACE on user1 wanted by looking at the allow
1984 permissions on the groups the user is currently in. This will
1985 be a snapshot, depending on group membership but is the best
1986 we can do and has the advantage of failing closed rather than
1988 ---------------------------------------------------------------------------
1989 Third pass - only deal with deny group entries.
1991 DENY group1 (perms XXX)
1993 for all following allow user entries where user is in group1
1994 user entry perms = user entry perms & ~ XXX;
1996 If there is a group Everyone allow entry with permissions YYY,
1997 convert the group1 entry to an allow entry and modify its
2000 new_perms = YYY & ~ XXX
2002 and push to the end of the list.
2004 If there is no group Everyone allow entry then convert the
2005 group1 entry to a allow nothing entry and push to the end of the list.
2007 Note that the common case from the NT ACL choser (groupX deny all)
2008 cannot be optimised here as we need to modify user entries who are
2009 in the group to change them to a deny all also.
2011 What we're doing here is modifying the allow permissions of
2012 user entries (which are more specific in POSIX ACLs) to mask
2013 out the explicit deny set on the group they are in. This will
2014 be a snapshot depending on current group membership but is the
2015 best we can do and has the advantage of failing closed rather
2017 ---------------------------------------------------------------------------
2018 Fourth pass - cope with cumulative permissions.
2020 for all allow user entries, if there exists an allow group entry with
2021 more permissive permissions, and the user is in that group, rewrite the
2022 allow user permissions to contain both sets of permissions.
2024 Currently the code for this is #ifdef'ed out as these semantics make
2025 no sense to me. JRA.
2026 ---------------------------------------------------------------------------
2028 Note we *MUST* do the deny user pass first as this will convert deny user
2029 entries into allow user entries which can then be processed by the deny
2032 The above algorithm took a *lot* of thinking about - hence this
2033 explaination :-). JRA.
2034 ****************************************************************************/
2036 /****************************************************************************
2037 Process a canon_ace list entries. This is very complex code. We need
2038 to go through and remove the "deny" permissions from any allow entry that matches
2039 the id of this entry. We have already refused any NT ACL that wasn't in correct
2040 order (DENY followed by ALLOW). If any allow entry ends up with zero permissions,
2041 we just remove it (to fail safe). We have already removed any duplicate ace
2042 entries. Treat an "Everyone" DENY_ACE as a special case - use it to mask all
2044 ****************************************************************************/
2046 static void process_deny_list( canon_ace **pp_ace_list )
2048 canon_ace *ace_list = *pp_ace_list;
2049 canon_ace *curr_ace = NULL;
2050 canon_ace *curr_ace_next = NULL;
2052 /* Pass 1 above - look for an Everyone, deny entry. */
2054 for (curr_ace = ace_list; curr_ace; curr_ace = curr_ace_next) {
2055 canon_ace *allow_ace_p;
2057 curr_ace_next = curr_ace->next; /* So we can't lose the link. */
2059 if (curr_ace->attr != DENY_ACE)
2062 if (curr_ace->perms == (mode_t)0) {
2064 /* Deny nothing entry - delete. */
2066 DLIST_REMOVE(ace_list, curr_ace);
2070 if (!sid_equal(&curr_ace->trustee, &global_sid_World))
2073 /* JRATEST - assert. */
2074 SMB_ASSERT(curr_ace->owner_type == WORLD_ACE);
2076 if (curr_ace->perms == ALL_ACE_PERMS) {
2079 * Optimisation. This is a DENY_ALL to Everyone. Truncate the
2080 * list at this point including this entry.
2083 canon_ace *prev_entry = curr_ace->prev;
2085 free_canon_ace_list( curr_ace );
2087 prev_entry->next = NULL;
2089 /* We deleted the entire list. */
2095 for (allow_ace_p = curr_ace->next; allow_ace_p; allow_ace_p = allow_ace_p->next) {
2098 * Only mask off allow entries.
2101 if (allow_ace_p->attr != ALLOW_ACE)
2104 allow_ace_p->perms &= ~curr_ace->perms;
2108 * Now it's been applied, remove it.
2111 DLIST_REMOVE(ace_list, curr_ace);
2114 /* Pass 2 above - deal with deny user entries. */
2116 for (curr_ace = ace_list; curr_ace; curr_ace = curr_ace_next) {
2117 mode_t new_perms = (mode_t)0;
2118 canon_ace *allow_ace_p;
2120 curr_ace_next = curr_ace->next; /* So we can't lose the link. */
2122 if (curr_ace->attr != DENY_ACE)
2125 if (curr_ace->owner_type != UID_ACE)
2128 if (curr_ace->perms == ALL_ACE_PERMS) {
2131 * Optimisation - this is a deny everything to this user.
2132 * Convert to an allow nothing and push to the end of the list.
2135 curr_ace->attr = ALLOW_ACE;
2136 curr_ace->perms = (mode_t)0;
2137 DLIST_DEMOTE(ace_list, curr_ace, canon_ace *);
2141 for (allow_ace_p = curr_ace->next; allow_ace_p; allow_ace_p = allow_ace_p->next) {
2143 if (allow_ace_p->attr != ALLOW_ACE)
2146 /* We process GID_ACE and WORLD_ACE entries only. */
2148 if (allow_ace_p->owner_type == UID_ACE)
2151 if (uid_entry_in_group( curr_ace, allow_ace_p))
2152 new_perms |= allow_ace_p->perms;
2156 * Convert to a allow entry, modify the perms and push to the end
2160 curr_ace->attr = ALLOW_ACE;
2161 curr_ace->perms = (new_perms & ~curr_ace->perms);
2162 DLIST_DEMOTE(ace_list, curr_ace, canon_ace *);
2165 /* Pass 3 above - deal with deny group entries. */
2167 for (curr_ace = ace_list; curr_ace; curr_ace = curr_ace_next) {
2168 canon_ace *allow_ace_p;
2169 canon_ace *allow_everyone_p = NULL;
2171 curr_ace_next = curr_ace->next; /* So we can't lose the link. */
2173 if (curr_ace->attr != DENY_ACE)
2176 if (curr_ace->owner_type != GID_ACE)
2179 for (allow_ace_p = curr_ace->next; allow_ace_p; allow_ace_p = allow_ace_p->next) {
2181 if (allow_ace_p->attr != ALLOW_ACE)
2184 /* Store a pointer to the Everyone allow, if it exists. */
2185 if (allow_ace_p->owner_type == WORLD_ACE)
2186 allow_everyone_p = allow_ace_p;
2188 /* We process UID_ACE entries only. */
2190 if (allow_ace_p->owner_type != UID_ACE)
2193 /* Mask off the deny group perms. */
2195 if (uid_entry_in_group( allow_ace_p, curr_ace))
2196 allow_ace_p->perms &= ~curr_ace->perms;
2200 * Convert the deny to an allow with the correct perms and
2201 * push to the end of the list.
2204 curr_ace->attr = ALLOW_ACE;
2205 if (allow_everyone_p)
2206 curr_ace->perms = allow_everyone_p->perms & ~curr_ace->perms;
2208 curr_ace->perms = (mode_t)0;
2209 DLIST_DEMOTE(ace_list, curr_ace, canon_ace *);
2212 /* Doing this fourth pass allows Windows semantics to be layered
2213 * on top of POSIX semantics. I'm not sure if this is desirable.
2214 * For example, in W2K ACLs there is no way to say, "Group X no
2215 * access, user Y full access" if user Y is a member of group X.
2216 * This seems completely broken semantics to me.... JRA.
2220 /* Pass 4 above - deal with allow entries. */
2222 for (curr_ace = ace_list; curr_ace; curr_ace = curr_ace_next) {
2223 canon_ace *allow_ace_p;
2225 curr_ace_next = curr_ace->next; /* So we can't lose the link. */
2227 if (curr_ace->attr != ALLOW_ACE)
2230 if (curr_ace->owner_type != UID_ACE)
2233 for (allow_ace_p = ace_list; allow_ace_p; allow_ace_p = allow_ace_p->next) {
2235 if (allow_ace_p->attr != ALLOW_ACE)
2238 /* We process GID_ACE entries only. */
2240 if (allow_ace_p->owner_type != GID_ACE)
2243 /* OR in the group perms. */
2245 if (uid_entry_in_group( curr_ace, allow_ace_p))
2246 curr_ace->perms |= allow_ace_p->perms;
2251 *pp_ace_list = ace_list;
2254 /****************************************************************************
2255 Unpack a SEC_DESC into two canonical ace lists. We don't depend on this
2257 ****************************************************************************/
2259 static bool unpack_canon_ace(files_struct *fsp,
2260 const SMB_STRUCT_STAT *pst,
2261 DOM_SID *pfile_owner_sid,
2262 DOM_SID *pfile_grp_sid,
2263 canon_ace **ppfile_ace,
2264 canon_ace **ppdir_ace,
2265 uint32 security_info_sent,
2266 const SEC_DESC *psd)
2268 canon_ace *file_ace = NULL;
2269 canon_ace *dir_ace = NULL;
2274 if(security_info_sent == 0) {
2275 DEBUG(0,("unpack_canon_ace: no security info sent !\n"));
2280 * If no DACL then this is a chown only security descriptor.
2283 if(!(security_info_sent & DACL_SECURITY_INFORMATION) || !psd->dacl)
2287 * Now go through the DACL and create the canon_ace lists.
2290 if (!create_canon_ace_lists( fsp, pst, pfile_owner_sid, pfile_grp_sid,
2291 &file_ace, &dir_ace, psd->dacl))
2294 if ((file_ace == NULL) && (dir_ace == NULL)) {
2295 /* W2K traverse DACL set - ignore. */
2300 * Go through the canon_ace list and merge entries
2301 * belonging to identical users of identical allow or deny type.
2302 * We can do this as all deny entries come first, followed by
2303 * all allow entries (we have mandated this before accepting this acl).
2306 print_canon_ace_list( "file ace - before merge", file_ace);
2307 merge_aces( &file_ace, false);
2309 print_canon_ace_list( "dir ace - before merge", dir_ace);
2310 merge_aces( &dir_ace, true);
2313 * NT ACLs are order dependent. Go through the acl lists and
2314 * process DENY entries by masking the allow entries.
2317 print_canon_ace_list( "file ace - before deny", file_ace);
2318 process_deny_list( &file_ace);
2320 print_canon_ace_list( "dir ace - before deny", dir_ace);
2321 process_deny_list( &dir_ace);
2324 * A well formed POSIX file or default ACL has at least 3 entries, a
2325 * SMB_ACL_USER_OBJ, SMB_ACL_GROUP_OBJ, SMB_ACL_OTHER_OBJ
2326 * and optionally a mask entry. Ensure this is the case.
2329 print_canon_ace_list( "file ace - before valid", file_ace);
2331 if (!ensure_canon_entry_valid(&file_ace, false, fsp->conn->params,
2332 fsp->is_directory, pfile_owner_sid, pfile_grp_sid, pst, True)) {
2333 free_canon_ace_list(file_ace);
2334 free_canon_ace_list(dir_ace);
2338 print_canon_ace_list( "dir ace - before valid", dir_ace);
2340 if (dir_ace && !ensure_canon_entry_valid(&dir_ace, true, fsp->conn->params,
2341 fsp->is_directory, pfile_owner_sid, pfile_grp_sid, pst, True)) {
2342 free_canon_ace_list(file_ace);
2343 free_canon_ace_list(dir_ace);
2347 print_canon_ace_list( "file ace - return", file_ace);
2348 print_canon_ace_list( "dir ace - return", dir_ace);
2350 *ppfile_ace = file_ace;
2351 *ppdir_ace = dir_ace;
2356 /******************************************************************************
2357 When returning permissions, try and fit NT display
2358 semantics if possible. Note the the canon_entries here must have been malloced.
2359 The list format should be - first entry = owner, followed by group and other user
2360 entries, last entry = other.
2362 Note that this doesn't exactly match the NT semantics for an ACL. As POSIX entries
2363 are not ordered, and match on the most specific entry rather than walking a list,
2364 then a simple POSIX permission of rw-r--r-- should really map to 5 entries,
2366 Entry 0: owner : deny all except read and write.
2367 Entry 1: owner : allow read and write.
2368 Entry 2: group : deny all except read.
2369 Entry 3: group : allow read.
2370 Entry 4: Everyone : allow read.
2372 But NT cannot display this in their ACL editor !
2373 ********************************************************************************/
2375 static void arrange_posix_perms(const char *filename, canon_ace **pp_list_head)
2377 canon_ace *l_head = *pp_list_head;
2378 canon_ace *owner_ace = NULL;
2379 canon_ace *other_ace = NULL;
2380 canon_ace *ace = NULL;
2382 for (ace = l_head; ace; ace = ace->next) {
2383 if (ace->type == SMB_ACL_USER_OBJ)
2385 else if (ace->type == SMB_ACL_OTHER) {
2386 /* Last ace - this is "other" */
2391 if (!owner_ace || !other_ace) {
2392 DEBUG(0,("arrange_posix_perms: Invalid POSIX permissions for file %s, missing owner or other.\n",
2398 * The POSIX algorithm applies to owner first, and other last,
2399 * so ensure they are arranged in this order.
2403 DLIST_PROMOTE(l_head, owner_ace);
2407 DLIST_DEMOTE(l_head, other_ace, canon_ace *);
2410 /* We have probably changed the head of the list. */
2412 *pp_list_head = l_head;
2415 /****************************************************************************
2416 Create a linked list of canonical ACE entries.
2417 ****************************************************************************/
2419 static canon_ace *canonicalise_acl(struct connection_struct *conn,
2420 const char *fname, SMB_ACL_T posix_acl,
2421 const SMB_STRUCT_STAT *psbuf,
2422 const DOM_SID *powner, const DOM_SID *pgroup, struct pai_val *pal, SMB_ACL_TYPE_T the_acl_type)
2424 mode_t acl_mask = (S_IRUSR|S_IWUSR|S_IXUSR);
2425 canon_ace *l_head = NULL;
2426 canon_ace *ace = NULL;
2427 canon_ace *next_ace = NULL;
2428 int entry_id = SMB_ACL_FIRST_ENTRY;
2429 bool is_default_acl = (the_acl_type == SMB_ACL_TYPE_DEFAULT);
2430 SMB_ACL_ENTRY_T entry;
2433 while ( posix_acl && (SMB_VFS_SYS_ACL_GET_ENTRY(conn, posix_acl, entry_id, &entry) == 1)) {
2434 SMB_ACL_TAG_T tagtype;
2435 SMB_ACL_PERMSET_T permset;
2438 enum ace_owner owner_type;
2440 entry_id = SMB_ACL_NEXT_ENTRY;
2442 /* Is this a MASK entry ? */
2443 if (SMB_VFS_SYS_ACL_GET_TAG_TYPE(conn, entry, &tagtype) == -1)
2446 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, entry, &permset) == -1)
2449 /* Decide which SID to use based on the ACL type. */
2451 case SMB_ACL_USER_OBJ:
2452 /* Get the SID from the owner. */
2453 sid_copy(&sid, powner);
2454 unix_ug.uid = psbuf->st_ex_uid;
2455 owner_type = UID_ACE;
2459 uid_t *puid = (uid_t *)SMB_VFS_SYS_ACL_GET_QUALIFIER(conn, entry);
2461 DEBUG(0,("canonicalise_acl: Failed to get uid.\n"));
2464 uid_to_sid( &sid, *puid);
2465 unix_ug.uid = *puid;
2466 owner_type = UID_ACE;
2467 SMB_VFS_SYS_ACL_FREE_QUALIFIER(conn, (void *)puid,tagtype);
2470 case SMB_ACL_GROUP_OBJ:
2471 /* Get the SID from the owning group. */
2472 sid_copy(&sid, pgroup);
2473 unix_ug.gid = psbuf->st_ex_gid;
2474 owner_type = GID_ACE;
2478 gid_t *pgid = (gid_t *)SMB_VFS_SYS_ACL_GET_QUALIFIER(conn, entry);
2480 DEBUG(0,("canonicalise_acl: Failed to get gid.\n"));
2483 gid_to_sid( &sid, *pgid);
2484 unix_ug.gid = *pgid;
2485 owner_type = GID_ACE;
2486 SMB_VFS_SYS_ACL_FREE_QUALIFIER(conn, (void *)pgid,tagtype);
2490 acl_mask = convert_permset_to_mode_t(conn, permset);
2491 continue; /* Don't count the mask as an entry. */
2493 /* Use the Everyone SID */
2494 sid = global_sid_World;
2496 owner_type = WORLD_ACE;
2499 DEBUG(0,("canonicalise_acl: Unknown tagtype %u\n", (unsigned int)tagtype));
2504 * Add this entry to the list.
2507 if ((ace = SMB_MALLOC_P(canon_ace)) == NULL)
2511 ace->type = tagtype;
2512 ace->perms = convert_permset_to_mode_t(conn, permset);
2513 ace->attr = ALLOW_ACE;
2515 ace->unix_ug = unix_ug;
2516 ace->owner_type = owner_type;
2517 ace->ace_flags = get_pai_flags(pal, ace, is_default_acl);
2519 DLIST_ADD(l_head, ace);
2523 * This next call will ensure we have at least a user/group/world set.
2526 if (!ensure_canon_entry_valid(&l_head, is_default_acl, conn->params,
2527 S_ISDIR(psbuf->st_ex_mode), powner, pgroup,
2532 * Now go through the list, masking the permissions with the
2533 * acl_mask. Ensure all DENY Entries are at the start of the list.
2536 DEBUG(10,("canonicalise_acl: %s ace entries before arrange :\n", is_default_acl ? "Default" : "Access"));
2538 for ( ace_count = 0, ace = l_head; ace; ace = next_ace, ace_count++) {
2539 next_ace = ace->next;
2541 /* Masks are only applied to entries other than USER_OBJ and OTHER. */
2542 if (ace->type != SMB_ACL_OTHER && ace->type != SMB_ACL_USER_OBJ)
2543 ace->perms &= acl_mask;
2545 if (ace->perms == 0) {
2546 DLIST_PROMOTE(l_head, ace);
2549 if( DEBUGLVL( 10 ) ) {
2550 print_canon_ace(ace, ace_count);
2554 arrange_posix_perms(fname,&l_head );
2556 print_canon_ace_list( "canonicalise_acl: ace entries after arrange", l_head );
2562 free_canon_ace_list(l_head);
2566 /****************************************************************************
2567 Check if the current user group list contains a given group.
2568 ****************************************************************************/
2570 bool current_user_in_group(gid_t gid)
2574 for (i = 0; i < current_user.ut.ngroups; i++) {
2575 if (current_user.ut.groups[i] == gid) {
2583 /****************************************************************************
2584 Should we override a deny ? Check 'acl group control' and 'dos filemode'.
2585 ****************************************************************************/
2587 static bool acl_group_override(connection_struct *conn,
2588 const struct smb_filename *smb_fname)
2590 if ((errno != EPERM) && (errno != EACCES)) {
2594 /* file primary group == user primary or supplementary group */
2595 if (lp_acl_group_control(SNUM(conn)) &&
2596 current_user_in_group(smb_fname->st.st_ex_gid)) {
2600 /* user has writeable permission */
2601 if (lp_dos_filemode(SNUM(conn)) &&
2602 can_write_to_file(conn, smb_fname)) {
2609 /****************************************************************************
2610 Attempt to apply an ACL to a file or directory.
2611 ****************************************************************************/
2613 static bool set_canon_ace_list(files_struct *fsp,
2616 const SMB_STRUCT_STAT *psbuf,
2617 bool *pacl_set_support)
2619 connection_struct *conn = fsp->conn;
2621 SMB_ACL_T the_acl = SMB_VFS_SYS_ACL_INIT(conn, (int)count_canon_ace_list(the_ace) + 1);
2624 SMB_ACL_ENTRY_T mask_entry;
2625 bool got_mask_entry = False;
2626 SMB_ACL_PERMSET_T mask_permset;
2627 SMB_ACL_TYPE_T the_acl_type = (default_ace ? SMB_ACL_TYPE_DEFAULT : SMB_ACL_TYPE_ACCESS);
2628 bool needs_mask = False;
2629 mode_t mask_perms = 0;
2631 /* Use the psbuf that was passed in. */
2632 if (psbuf != &fsp->fsp_name->st) {
2633 fsp->fsp_name->st = *psbuf;
2636 #if defined(POSIX_ACL_NEEDS_MASK)
2637 /* HP-UX always wants to have a mask (called "class" there). */
2641 if (the_acl == NULL) {
2643 if (!no_acl_syscall_error(errno)) {
2645 * Only print this error message if we have some kind of ACL
2646 * support that's not working. Otherwise we would always get this.
2648 DEBUG(0,("set_canon_ace_list: Unable to init %s ACL. (%s)\n",
2649 default_ace ? "default" : "file", strerror(errno) ));
2651 *pacl_set_support = False;
2655 if( DEBUGLVL( 10 )) {
2656 dbgtext("set_canon_ace_list: setting ACL:\n");
2657 for (i = 0, p_ace = the_ace; p_ace; p_ace = p_ace->next, i++ ) {
2658 print_canon_ace( p_ace, i);
2662 for (i = 0, p_ace = the_ace; p_ace; p_ace = p_ace->next, i++ ) {
2663 SMB_ACL_ENTRY_T the_entry;
2664 SMB_ACL_PERMSET_T the_permset;
2667 * ACLs only "need" an ACL_MASK entry if there are any named user or
2668 * named group entries. But if there is an ACL_MASK entry, it applies
2669 * to ACL_USER, ACL_GROUP, and ACL_GROUP_OBJ entries. Set the mask
2670 * so that it doesn't deny (i.e., mask off) any permissions.
2673 if (p_ace->type == SMB_ACL_USER || p_ace->type == SMB_ACL_GROUP) {
2675 mask_perms |= p_ace->perms;
2676 } else if (p_ace->type == SMB_ACL_GROUP_OBJ) {
2677 mask_perms |= p_ace->perms;
2681 * Get the entry for this ACE.
2684 if (SMB_VFS_SYS_ACL_CREATE_ENTRY(conn, &the_acl, &the_entry) == -1) {
2685 DEBUG(0,("set_canon_ace_list: Failed to create entry %d. (%s)\n",
2686 i, strerror(errno) ));
2690 if (p_ace->type == SMB_ACL_MASK) {
2691 mask_entry = the_entry;
2692 got_mask_entry = True;
2696 * Ok - we now know the ACL calls should be working, don't
2697 * allow fallback to chmod.
2700 *pacl_set_support = True;
2703 * Initialise the entry from the canon_ace.
2707 * First tell the entry what type of ACE this is.
2710 if (SMB_VFS_SYS_ACL_SET_TAG_TYPE(conn, the_entry, p_ace->type) == -1) {
2711 DEBUG(0,("set_canon_ace_list: Failed to set tag type on entry %d. (%s)\n",
2712 i, strerror(errno) ));
2717 * Only set the qualifier (user or group id) if the entry is a user
2721 if ((p_ace->type == SMB_ACL_USER) || (p_ace->type == SMB_ACL_GROUP)) {
2722 if (SMB_VFS_SYS_ACL_SET_QUALIFIER(conn, the_entry,(void *)&p_ace->unix_ug.uid) == -1) {
2723 DEBUG(0,("set_canon_ace_list: Failed to set qualifier on entry %d. (%s)\n",
2724 i, strerror(errno) ));
2730 * Convert the mode_t perms in the canon_ace to a POSIX permset.
2733 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, the_entry, &the_permset) == -1) {
2734 DEBUG(0,("set_canon_ace_list: Failed to get permset on entry %d. (%s)\n",
2735 i, strerror(errno) ));
2739 if (map_acl_perms_to_permset(conn, p_ace->perms, &the_permset) == -1) {
2740 DEBUG(0,("set_canon_ace_list: Failed to create permset for mode (%u) on entry %d. (%s)\n",
2741 (unsigned int)p_ace->perms, i, strerror(errno) ));
2746 * ..and apply them to the entry.
2749 if (SMB_VFS_SYS_ACL_SET_PERMSET(conn, the_entry, the_permset) == -1) {
2750 DEBUG(0,("set_canon_ace_list: Failed to add permset on entry %d. (%s)\n",
2751 i, strerror(errno) ));
2756 print_canon_ace( p_ace, i);
2760 if (needs_mask && !got_mask_entry) {
2761 if (SMB_VFS_SYS_ACL_CREATE_ENTRY(conn, &the_acl, &mask_entry) == -1) {
2762 DEBUG(0,("set_canon_ace_list: Failed to create mask entry. (%s)\n", strerror(errno) ));
2766 if (SMB_VFS_SYS_ACL_SET_TAG_TYPE(conn, mask_entry, SMB_ACL_MASK) == -1) {
2767 DEBUG(0,("set_canon_ace_list: Failed to set tag type on mask entry. (%s)\n",strerror(errno) ));
2771 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, mask_entry, &mask_permset) == -1) {
2772 DEBUG(0,("set_canon_ace_list: Failed to get mask permset. (%s)\n", strerror(errno) ));
2776 if (map_acl_perms_to_permset(conn, S_IRUSR|S_IWUSR|S_IXUSR, &mask_permset) == -1) {
2777 DEBUG(0,("set_canon_ace_list: Failed to create mask permset. (%s)\n", strerror(errno) ));
2781 if (SMB_VFS_SYS_ACL_SET_PERMSET(conn, mask_entry, mask_permset) == -1) {
2782 DEBUG(0,("set_canon_ace_list: Failed to add mask permset. (%s)\n", strerror(errno) ));
2788 * Finally apply it to the file or directory.
2791 if(default_ace || fsp->is_directory || fsp->fh->fd == -1) {
2792 if (SMB_VFS_SYS_ACL_SET_FILE(conn, fsp->fsp_name->base_name,
2793 the_acl_type, the_acl) == -1) {
2795 * Some systems allow all the above calls and only fail with no ACL support
2796 * when attempting to apply the acl. HPUX with HFS is an example of this. JRA.
2798 if (no_acl_syscall_error(errno)) {
2799 *pacl_set_support = False;
2802 if (acl_group_override(conn, fsp->fsp_name)) {
2805 DEBUG(5,("set_canon_ace_list: acl group "
2806 "control on and current user in file "
2807 "%s primary group.\n",
2811 sret = SMB_VFS_SYS_ACL_SET_FILE(conn,
2812 fsp->fsp_name->base_name, the_acl_type,
2821 DEBUG(2,("set_canon_ace_list: "
2822 "sys_acl_set_file type %s failed for "
2824 the_acl_type == SMB_ACL_TYPE_DEFAULT ?
2825 "directory default" : "file",
2826 fsp_str_dbg(fsp), strerror(errno)));
2831 if (SMB_VFS_SYS_ACL_SET_FD(fsp, the_acl) == -1) {
2833 * Some systems allow all the above calls and only fail with no ACL support
2834 * when attempting to apply the acl. HPUX with HFS is an example of this. JRA.
2836 if (no_acl_syscall_error(errno)) {
2837 *pacl_set_support = False;
2840 if (acl_group_override(conn, fsp->fsp_name)) {
2843 DEBUG(5,("set_canon_ace_list: acl group "
2844 "control on and current user in file "
2845 "%s primary group.\n",
2849 sret = SMB_VFS_SYS_ACL_SET_FD(fsp, the_acl);
2857 DEBUG(2,("set_canon_ace_list: "
2858 "sys_acl_set_file failed for file %s "
2860 fsp_str_dbg(fsp), strerror(errno)));
2870 if (the_acl != NULL) {
2871 SMB_VFS_SYS_ACL_FREE_ACL(conn, the_acl);
2877 /****************************************************************************
2878 Find a particular canon_ace entry.
2879 ****************************************************************************/
2881 static struct canon_ace *canon_ace_entry_for(struct canon_ace *list, SMB_ACL_TAG_T type, posix_id *id)
2884 if (list->type == type && ((type != SMB_ACL_USER && type != SMB_ACL_GROUP) ||
2885 (type == SMB_ACL_USER && id && id->uid == list->unix_ug.uid) ||
2886 (type == SMB_ACL_GROUP && id && id->gid == list->unix_ug.gid)))
2893 /****************************************************************************
2895 ****************************************************************************/
2897 SMB_ACL_T free_empty_sys_acl(connection_struct *conn, SMB_ACL_T the_acl)
2899 SMB_ACL_ENTRY_T entry;
2903 if (SMB_VFS_SYS_ACL_GET_ENTRY(conn, the_acl, SMB_ACL_FIRST_ENTRY, &entry) != 1) {
2904 SMB_VFS_SYS_ACL_FREE_ACL(conn, the_acl);
2910 /****************************************************************************
2911 Convert a canon_ace to a generic 3 element permission - if possible.
2912 ****************************************************************************/
2914 #define MAP_PERM(p,mask,result) (((p) & (mask)) ? (result) : 0 )
2916 static bool convert_canon_ace_to_posix_perms( files_struct *fsp, canon_ace *file_ace_list, mode_t *posix_perms)
2918 int snum = SNUM(fsp->conn);
2919 size_t ace_count = count_canon_ace_list(file_ace_list);
2921 canon_ace *owner_ace = NULL;
2922 canon_ace *group_ace = NULL;
2923 canon_ace *other_ace = NULL;
2927 if (ace_count != 3) {
2928 DEBUG(3,("convert_canon_ace_to_posix_perms: Too many ACE "
2929 "entries for file %s to convert to posix perms.\n",
2934 for (ace_p = file_ace_list; ace_p; ace_p = ace_p->next) {
2935 if (ace_p->owner_type == UID_ACE)
2937 else if (ace_p->owner_type == GID_ACE)
2939 else if (ace_p->owner_type == WORLD_ACE)
2943 if (!owner_ace || !group_ace || !other_ace) {
2944 DEBUG(3,("convert_canon_ace_to_posix_perms: Can't get "
2945 "standard entries for file %s.\n", fsp_str_dbg(fsp)));
2949 *posix_perms = (mode_t)0;
2951 *posix_perms |= owner_ace->perms;
2952 *posix_perms |= MAP_PERM(group_ace->perms, S_IRUSR, S_IRGRP);
2953 *posix_perms |= MAP_PERM(group_ace->perms, S_IWUSR, S_IWGRP);
2954 *posix_perms |= MAP_PERM(group_ace->perms, S_IXUSR, S_IXGRP);
2955 *posix_perms |= MAP_PERM(other_ace->perms, S_IRUSR, S_IROTH);
2956 *posix_perms |= MAP_PERM(other_ace->perms, S_IWUSR, S_IWOTH);
2957 *posix_perms |= MAP_PERM(other_ace->perms, S_IXUSR, S_IXOTH);
2959 /* The owner must have at least read access. */
2961 *posix_perms |= S_IRUSR;
2962 if (fsp->is_directory)
2963 *posix_perms |= (S_IWUSR|S_IXUSR);
2965 /* If requested apply the masks. */
2967 /* Get the initial bits to apply. */
2969 if (fsp->is_directory) {
2970 and_bits = lp_dir_security_mask(snum);
2971 or_bits = lp_force_dir_security_mode(snum);
2973 and_bits = lp_security_mask(snum);
2974 or_bits = lp_force_security_mode(snum);
2977 *posix_perms = (((*posix_perms) & and_bits)|or_bits);
2979 DEBUG(10,("convert_canon_ace_to_posix_perms: converted u=%o,g=%o,w=%o "
2980 "to perm=0%o for file %s.\n", (int)owner_ace->perms,
2981 (int)group_ace->perms, (int)other_ace->perms,
2982 (int)*posix_perms, fsp_str_dbg(fsp)));
2987 /****************************************************************************
2988 Incoming NT ACLs on a directory can be split into a default POSIX acl (CI|OI|IO) and
2989 a normal POSIX acl. Win2k needs these split acls re-merging into one ACL
2990 with CI|OI set so it is inherited and also applies to the directory.
2991 Based on code from "Jim McDonough" <jmcd@us.ibm.com>.
2992 ****************************************************************************/
2994 static size_t merge_default_aces( SEC_ACE *nt_ace_list, size_t num_aces)
2998 for (i = 0; i < num_aces; i++) {
2999 for (j = i+1; j < num_aces; j++) {
3000 uint32 i_flags_ni = (nt_ace_list[i].flags & ~SEC_ACE_FLAG_INHERITED_ACE);
3001 uint32 j_flags_ni = (nt_ace_list[j].flags & ~SEC_ACE_FLAG_INHERITED_ACE);
3002 bool i_inh = (nt_ace_list[i].flags & SEC_ACE_FLAG_INHERITED_ACE) ? True : False;
3003 bool j_inh = (nt_ace_list[j].flags & SEC_ACE_FLAG_INHERITED_ACE) ? True : False;
3005 /* We know the lower number ACE's are file entries. */
3006 if ((nt_ace_list[i].type == nt_ace_list[j].type) &&
3007 (nt_ace_list[i].size == nt_ace_list[j].size) &&
3008 (nt_ace_list[i].access_mask == nt_ace_list[j].access_mask) &&
3009 sid_equal(&nt_ace_list[i].trustee, &nt_ace_list[j].trustee) &&
3011 (i_flags_ni == 0) &&
3012 (j_flags_ni == (SEC_ACE_FLAG_OBJECT_INHERIT|
3013 SEC_ACE_FLAG_CONTAINER_INHERIT|
3014 SEC_ACE_FLAG_INHERIT_ONLY))) {
3016 * W2K wants to have access allowed zero access ACE's
3017 * at the end of the list. If the mask is zero, merge
3018 * the non-inherited ACE onto the inherited ACE.
3021 if (nt_ace_list[i].access_mask == 0) {
3022 nt_ace_list[j].flags = SEC_ACE_FLAG_OBJECT_INHERIT|SEC_ACE_FLAG_CONTAINER_INHERIT|
3023 (i_inh ? SEC_ACE_FLAG_INHERITED_ACE : 0);
3024 if (num_aces - i - 1 > 0)
3025 memmove(&nt_ace_list[i], &nt_ace_list[i+1], (num_aces-i-1) *
3028 DEBUG(10,("merge_default_aces: Merging zero access ACE %u onto ACE %u.\n",
3029 (unsigned int)i, (unsigned int)j ));
3032 * These are identical except for the flags.
3033 * Merge the inherited ACE onto the non-inherited ACE.
3036 nt_ace_list[i].flags = SEC_ACE_FLAG_OBJECT_INHERIT|SEC_ACE_FLAG_CONTAINER_INHERIT|
3037 (i_inh ? SEC_ACE_FLAG_INHERITED_ACE : 0);
3038 if (num_aces - j - 1 > 0)
3039 memmove(&nt_ace_list[j], &nt_ace_list[j+1], (num_aces-j-1) *
3042 DEBUG(10,("merge_default_aces: Merging ACE %u onto ACE %u.\n",
3043 (unsigned int)j, (unsigned int)i ));
3055 * Add or Replace ACE entry.
3056 * In some cases we need to add a specific ACE for compatibility reasons.
3057 * When doing that we must make sure we are not actually creating a duplicate
3058 * entry. So we need to search whether an ACE entry already exist and eventually
3059 * replacce the access mask, or add a completely new entry if none was found.
3061 * This function assumes the array has enough space to add a new entry without
3062 * any reallocation of memory.
3065 static void add_or_replace_ace(SEC_ACE *nt_ace_list, size_t *num_aces,
3066 const DOM_SID *sid, enum security_ace_type type,
3067 uint32_t mask, uint8_t flags)
3071 /* first search for a duplicate */
3072 for (i = 0; i < *num_aces; i++) {
3073 if (sid_equal(&nt_ace_list[i].trustee, sid) &&
3074 (nt_ace_list[i].flags == flags)) break;
3077 if (i < *num_aces) { /* found */
3078 nt_ace_list[i].type = type;
3079 nt_ace_list[i].access_mask = mask;
3080 DEBUG(10, ("Replacing ACE %d with SID %s and flags %02x\n",
3081 i, sid_string_dbg(sid), flags));
3085 /* not found, append it */
3086 init_sec_ace(&nt_ace_list[(*num_aces)++], sid, type, mask, flags);
3090 /****************************************************************************
3091 Reply to query a security descriptor from an fsp. If it succeeds it allocates
3092 the space for the return elements and returns the size needed to return the
3093 security descriptor. This should be the only external function needed for
3094 the UNIX style get ACL.
3095 ****************************************************************************/
3097 static NTSTATUS posix_get_nt_acl_common(struct connection_struct *conn,
3099 const SMB_STRUCT_STAT *sbuf,
3100 struct pai_val *pal,
3101 SMB_ACL_T posix_acl,
3103 uint32_t security_info,
3109 SEC_ACL *psa = NULL;
3110 size_t num_acls = 0;
3111 size_t num_def_acls = 0;
3112 size_t num_aces = 0;
3113 canon_ace *file_ace = NULL;
3114 canon_ace *dir_ace = NULL;
3115 SEC_ACE *nt_ace_list = NULL;
3116 size_t num_profile_acls = 0;
3117 DOM_SID orig_owner_sid;
3118 SEC_DESC *psd = NULL;
3122 * Get the owner, group and world SIDs.
3125 create_file_sids(sbuf, &owner_sid, &group_sid);
3127 if (lp_profile_acls(SNUM(conn))) {
3128 /* For WXP SP1 the owner must be administrators. */
3129 sid_copy(&orig_owner_sid, &owner_sid);
3130 sid_copy(&owner_sid, &global_sid_Builtin_Administrators);
3131 sid_copy(&group_sid, &global_sid_Builtin_Users);
3132 num_profile_acls = 3;
3135 if ((security_info & DACL_SECURITY_INFORMATION) && !(security_info & PROTECTED_DACL_SECURITY_INFORMATION)) {
3138 * In the optimum case Creator Owner and Creator Group would be used for
3139 * the ACL_USER_OBJ and ACL_GROUP_OBJ entries, respectively, but this
3140 * would lead to usability problems under Windows: The Creator entries
3141 * are only available in browse lists of directories and not for files;
3142 * additionally the identity of the owning group couldn't be determined.
3143 * We therefore use those identities only for Default ACLs.
3146 /* Create the canon_ace lists. */
3147 file_ace = canonicalise_acl(conn, name, posix_acl, sbuf,
3148 &owner_sid, &group_sid, pal,
3149 SMB_ACL_TYPE_ACCESS);
3151 /* We must have *some* ACLS. */
3153 if (count_canon_ace_list(file_ace) == 0) {
3154 DEBUG(0,("get_nt_acl : No ACLs on file (%s) !\n", name));
3158 if (S_ISDIR(sbuf->st_ex_mode) && def_acl) {
3159 dir_ace = canonicalise_acl(conn, name, def_acl,
3161 &global_sid_Creator_Owner,
3162 &global_sid_Creator_Group,
3163 pal, SMB_ACL_TYPE_DEFAULT);
3167 * Create the NT ACE list from the canonical ace lists.
3172 enum security_ace_type nt_acl_type;
3174 if (nt4_compatible_acls() && dir_ace) {
3176 * NT 4 chokes if an ACL contains an INHERIT_ONLY entry
3177 * but no non-INHERIT_ONLY entry for one SID. So we only
3178 * remove entries from the Access ACL if the
3179 * corresponding Default ACL entries have also been
3180 * removed. ACEs for CREATOR-OWNER and CREATOR-GROUP
3181 * are exceptions. We can do nothing
3182 * intelligent if the Default ACL contains entries that
3183 * are not also contained in the Access ACL, so this
3184 * case will still fail under NT 4.
3187 ace = canon_ace_entry_for(dir_ace, SMB_ACL_OTHER, NULL);
3188 if (ace && !ace->perms) {
3189 DLIST_REMOVE(dir_ace, ace);
3192 ace = canon_ace_entry_for(file_ace, SMB_ACL_OTHER, NULL);
3193 if (ace && !ace->perms) {
3194 DLIST_REMOVE(file_ace, ace);
3200 * WinNT doesn't usually have Creator Group
3201 * in browse lists, so we send this entry to
3202 * WinNT even if it contains no relevant
3203 * permissions. Once we can add
3204 * Creator Group to browse lists we can
3209 ace = canon_ace_entry_for(dir_ace, SMB_ACL_GROUP_OBJ, NULL);
3210 if (ace && !ace->perms) {
3211 DLIST_REMOVE(dir_ace, ace);
3216 ace = canon_ace_entry_for(file_ace, SMB_ACL_GROUP_OBJ, NULL);
3217 if (ace && !ace->perms) {
3218 DLIST_REMOVE(file_ace, ace);
3223 num_acls = count_canon_ace_list(file_ace);
3224 num_def_acls = count_canon_ace_list(dir_ace);
3226 /* Allocate the ace list. */
3227 if ((nt_ace_list = SMB_MALLOC_ARRAY(SEC_ACE,num_acls + num_profile_acls + num_def_acls)) == NULL) {
3228 DEBUG(0,("get_nt_acl: Unable to malloc space for nt_ace_list.\n"));
3232 memset(nt_ace_list, '\0', (num_acls + num_def_acls) * sizeof(SEC_ACE) );
3235 * Create the NT ACE list from the canonical ace lists.
3238 for (ace = file_ace; ace != NULL; ace = ace->next) {
3239 uint32_t acc = map_canon_ace_perms(SNUM(conn),
3242 S_ISDIR(sbuf->st_ex_mode));
3243 init_sec_ace(&nt_ace_list[num_aces++],
3250 /* The User must have access to a profile share - even
3251 * if we can't map the SID. */
3252 if (lp_profile_acls(SNUM(conn))) {
3253 add_or_replace_ace(nt_ace_list, &num_aces,
3254 &global_sid_Builtin_Users,
3255 SEC_ACE_TYPE_ACCESS_ALLOWED,
3256 FILE_GENERIC_ALL, 0);
3259 for (ace = dir_ace; ace != NULL; ace = ace->next) {
3260 uint32_t acc = map_canon_ace_perms(SNUM(conn),
3263 S_ISDIR(sbuf->st_ex_mode));
3264 init_sec_ace(&nt_ace_list[num_aces++],
3269 SEC_ACE_FLAG_OBJECT_INHERIT|
3270 SEC_ACE_FLAG_CONTAINER_INHERIT|
3271 SEC_ACE_FLAG_INHERIT_ONLY);
3274 /* The User must have access to a profile share - even
3275 * if we can't map the SID. */
3276 if (lp_profile_acls(SNUM(conn))) {
3277 add_or_replace_ace(nt_ace_list, &num_aces,
3278 &global_sid_Builtin_Users,
3279 SEC_ACE_TYPE_ACCESS_ALLOWED,
3281 SEC_ACE_FLAG_OBJECT_INHERIT |
3282 SEC_ACE_FLAG_CONTAINER_INHERIT |
3283 SEC_ACE_FLAG_INHERIT_ONLY);
3287 * Merge POSIX default ACLs and normal ACLs into one NT ACE.
3288 * Win2K needs this to get the inheritance correct when replacing ACLs
3289 * on a directory tree. Based on work by Jim @ IBM.
3292 num_aces = merge_default_aces(nt_ace_list, num_aces);
3294 if (lp_profile_acls(SNUM(conn))) {
3295 for (i = 0; i < num_aces; i++) {
3296 if (sid_equal(&nt_ace_list[i].trustee, &owner_sid)) {
3297 add_or_replace_ace(nt_ace_list, &num_aces,
3299 nt_ace_list[i].type,
3300 nt_ace_list[i].access_mask,
3301 nt_ace_list[i].flags);
3309 if((psa = make_sec_acl( talloc_tos(), NT4_ACL_REVISION, num_aces, nt_ace_list)) == NULL) {
3310 DEBUG(0,("get_nt_acl: Unable to malloc space for acl.\n"));
3314 } /* security_info & DACL_SECURITY_INFORMATION */
3316 psd = make_standard_sec_desc( talloc_tos(),
3317 (security_info & OWNER_SECURITY_INFORMATION) ? &owner_sid : NULL,
3318 (security_info & GROUP_SECURITY_INFORMATION) ? &group_sid : NULL,
3323 DEBUG(0,("get_nt_acl: Unable to malloc space for security descriptor.\n"));
3329 * Windows 2000: The DACL_PROTECTED flag in the security
3330 * descriptor marks the ACL as non-inheriting, i.e., no
3331 * ACEs from higher level directories propagate to this
3332 * ACL. In the POSIX ACL model permissions are only
3333 * inherited at file create time, so ACLs never contain
3334 * any ACEs that are inherited dynamically. The DACL_PROTECTED
3335 * flag doesn't seem to bother Windows NT.
3336 * Always set this if map acl inherit is turned off.
3338 if (pal == NULL || !lp_map_acl_inherit(SNUM(conn))) {
3339 psd->type |= SEC_DESC_DACL_PROTECTED;
3341 psd->type |= pal->sd_type;
3345 dacl_sort_into_canonical_order(psd->dacl->aces, (unsigned int)psd->dacl->num_aces);
3353 SMB_VFS_SYS_ACL_FREE_ACL(conn, posix_acl);
3356 SMB_VFS_SYS_ACL_FREE_ACL(conn, def_acl);
3358 free_canon_ace_list(file_ace);
3359 free_canon_ace_list(dir_ace);
3360 free_inherited_info(pal);
3361 SAFE_FREE(nt_ace_list);
3363 return NT_STATUS_OK;
3366 NTSTATUS posix_fget_nt_acl(struct files_struct *fsp, uint32_t security_info,
3369 SMB_STRUCT_STAT sbuf;
3370 SMB_ACL_T posix_acl = NULL;
3371 struct pai_val *pal;
3375 DEBUG(10,("posix_fget_nt_acl: called for file %s\n",
3378 /* can it happen that fsp_name == NULL ? */
3379 if (fsp->is_directory || fsp->fh->fd == -1) {
3380 return posix_get_nt_acl(fsp->conn, fsp->fsp_name->base_name,
3381 security_info, ppdesc);
3384 /* Get the stat struct for the owner info. */
3385 if(SMB_VFS_FSTAT(fsp, &sbuf) != 0) {
3386 return map_nt_error_from_unix(errno);
3389 /* Get the ACL from the fd. */
3390 posix_acl = SMB_VFS_SYS_ACL_GET_FD(fsp);
3392 pal = fload_inherited_info(fsp);
3394 return posix_get_nt_acl_common(fsp->conn, fsp->fsp_name->base_name,
3395 &sbuf, pal, posix_acl, NULL,
3396 security_info, ppdesc);
3399 NTSTATUS posix_get_nt_acl(struct connection_struct *conn, const char *name,
3400 uint32_t security_info, SEC_DESC **ppdesc)
3402 SMB_ACL_T posix_acl = NULL;
3403 SMB_ACL_T def_acl = NULL;
3404 struct pai_val *pal;
3405 struct smb_filename smb_fname;
3410 DEBUG(10,("posix_get_nt_acl: called for file %s\n", name ));
3412 ZERO_STRUCT(smb_fname);
3413 smb_fname.base_name = discard_const_p(char, name);
3415 /* Get the stat struct for the owner info. */
3416 if (lp_posix_pathnames()) {
3417 ret = SMB_VFS_LSTAT(conn, &smb_fname);
3419 ret = SMB_VFS_STAT(conn, &smb_fname);
3423 return map_nt_error_from_unix(errno);
3426 /* Get the ACL from the path. */
3427 posix_acl = SMB_VFS_SYS_ACL_GET_FILE(conn, name, SMB_ACL_TYPE_ACCESS);
3429 /* If it's a directory get the default POSIX ACL. */
3430 if(S_ISDIR(smb_fname.st.st_ex_mode)) {
3431 def_acl = SMB_VFS_SYS_ACL_GET_FILE(conn, name, SMB_ACL_TYPE_DEFAULT);
3432 def_acl = free_empty_sys_acl(conn, def_acl);
3435 pal = load_inherited_info(conn, name);
3437 return posix_get_nt_acl_common(conn, name, &smb_fname.st, pal,
3438 posix_acl, def_acl, security_info,
3442 /****************************************************************************
3443 Try to chown a file. We will be able to chown it under the following conditions.
3445 1) If we have root privileges, then it will just work.
3446 2) If we have SeTakeOwnershipPrivilege we can change the user to the current user.
3447 3) If we have SeRestorePrivilege we can change the user to any other user.
3448 4) If we have write permission to the file and dos_filemodes is set
3449 then allow chown to the currently authenticated user.
3450 ****************************************************************************/
3452 int try_chown(connection_struct *conn, struct smb_filename *smb_fname,
3453 uid_t uid, gid_t gid)
3458 if(!CAN_WRITE(conn)) {
3463 /* try the direct way first */
3464 if (lp_posix_pathnames()) {
3465 ret = SMB_VFS_LCHOWN(conn, smb_fname->base_name, uid, gid);
3467 ret = SMB_VFS_CHOWN(conn, smb_fname->base_name, uid, gid);
3473 /* Case (2) / (3) */
3474 if (lp_enable_privileges()) {
3476 bool has_take_ownership_priv = user_has_privileges(current_user.nt_user_token,
3477 &se_take_ownership);
3478 bool has_restore_priv = user_has_privileges(current_user.nt_user_token,
3482 if ( ( has_take_ownership_priv && ( uid == current_user.ut.uid ) ) ||
3484 ( has_restore_priv ) ) {
3487 /* Keep the current file gid the same - take ownership doesn't imply group change. */
3488 if (lp_posix_pathnames()) {
3489 ret = SMB_VFS_LCHOWN(conn, smb_fname->base_name, uid,
3492 ret = SMB_VFS_CHOWN(conn, smb_fname->base_name, uid,
3501 if (!lp_dos_filemode(SNUM(conn))) {
3506 /* only allow chown to the current user. This is more secure,
3507 and also copes with the case where the SID in a take ownership ACL is
3508 a local SID on the users workstation
3510 if (uid != current_user.ut.uid) {
3515 if (lp_posix_pathnames()) {
3516 ret = SMB_VFS_LSTAT(conn, smb_fname);
3518 ret = SMB_VFS_STAT(conn, smb_fname);
3525 if (!NT_STATUS_IS_OK(open_file_fchmod(conn, smb_fname, &fsp))) {
3530 /* Keep the current file gid the same. */
3531 if (fsp->fh->fd == -1) {
3532 if (lp_posix_pathnames()) {
3533 ret = SMB_VFS_LCHOWN(conn, smb_fname->base_name, uid,
3536 ret = SMB_VFS_CHOWN(conn, smb_fname->base_name, uid,
3540 ret = SMB_VFS_FCHOWN(fsp, uid, (gid_t)-1);
3544 close_file(NULL, fsp, NORMAL_CLOSE);
3550 /* Disable this - prevents ACL inheritance from the ACL editor. JRA. */
3552 /****************************************************************************
3553 Take care of parent ACL inheritance.
3554 ****************************************************************************/
3556 NTSTATUS append_parent_acl(files_struct *fsp,
3557 const SEC_DESC *pcsd,
3558 SEC_DESC **pp_new_sd)
3560 struct smb_filename *smb_dname = NULL;
3561 SEC_DESC *parent_sd = NULL;
3562 files_struct *parent_fsp = NULL;
3563 TALLOC_CTX *mem_ctx = talloc_tos();
3564 char *parent_name = NULL;
3565 SEC_ACE *new_ace = NULL;
3566 unsigned int num_aces = pcsd->dacl->num_aces;
3570 SEC_DESC *psd = dup_sec_desc(talloc_tos(), pcsd);
3571 bool is_dacl_protected = (pcsd->type & SEC_DESC_DACL_PROTECTED);
3574 return NT_STATUS_NO_MEMORY;
3577 if (!parent_dirname(mem_ctx, fsp->fsp_name->base_name, &parent_name,
3579 return NT_STATUS_NO_MEMORY;
3582 status = create_synthetic_smb_fname(mem_ctx, parent_name, NULL, NULL,
3584 if (!NT_STATUS_IS_OK(status)) {
3588 status = SMB_VFS_CREATE_FILE(
3589 fsp->conn, /* conn */
3591 0, /* root_dir_fid */
3592 smb_dname, /* fname */
3593 FILE_READ_ATTRIBUTES, /* access_mask */
3594 FILE_SHARE_NONE, /* share_access */
3595 FILE_OPEN, /* create_disposition*/
3596 FILE_DIRECTORY_FILE, /* create_options */
3597 0, /* file_attributes */
3598 INTERNAL_OPEN_ONLY, /* oplock_request */
3599 0, /* allocation_size */
3602 &parent_fsp, /* result */
3605 if (!NT_STATUS_IS_OK(status)) {
3606 TALLOC_FREE(smb_dname);
3610 status = SMB_VFS_GET_NT_ACL(parent_fsp->conn, smb_dname->base_name,
3611 DACL_SECURITY_INFORMATION, &parent_sd );
3613 close_file(NULL, parent_fsp, NORMAL_CLOSE);
3614 TALLOC_FREE(smb_dname);
3616 if (!NT_STATUS_IS_OK(status)) {
3621 * Make room for potentially all the ACLs from
3622 * the parent. We used to add the ugw triple here,
3623 * as we knew we were dealing with POSIX ACLs.
3624 * We no longer need to do so as we can guarentee
3625 * that a default ACL from the parent directory will
3626 * be well formed for POSIX ACLs if it came from a
3627 * POSIX ACL source, and if we're not writing to a
3628 * POSIX ACL sink then we don't care if it's not well
3632 num_aces += parent_sd->dacl->num_aces;
3634 if((new_ace = TALLOC_ZERO_ARRAY(mem_ctx, SEC_ACE,
3635 num_aces)) == NULL) {
3636 return NT_STATUS_NO_MEMORY;
3639 /* Start by copying in all the given ACE entries. */
3640 for (i = 0; i < psd->dacl->num_aces; i++) {
3641 sec_ace_copy(&new_ace[i], &psd->dacl->aces[i]);
3645 * Note that we're ignoring "inherit permissions" here
3646 * as that really only applies to newly created files. JRA.
3649 /* Finally append any inherited ACEs. */
3650 for (j = 0; j < parent_sd->dacl->num_aces; j++) {
3651 SEC_ACE *se = &parent_sd->dacl->aces[j];
3653 if (fsp->is_directory) {
3654 if (!(se->flags & SEC_ACE_FLAG_CONTAINER_INHERIT)) {
3655 /* Doesn't apply to a directory - ignore. */
3656 DEBUG(10,("append_parent_acl: directory %s "
3657 "ignoring non container "
3658 "inherit flags %u on ACE with sid %s "
3661 (unsigned int)se->flags,
3662 sid_string_dbg(&se->trustee),
3667 if (!(se->flags & SEC_ACE_FLAG_OBJECT_INHERIT)) {
3668 /* Doesn't apply to a file - ignore. */
3669 DEBUG(10,("append_parent_acl: file %s "
3670 "ignoring non object "
3671 "inherit flags %u on ACE with sid %s "
3674 (unsigned int)se->flags,
3675 sid_string_dbg(&se->trustee),
3681 if (is_dacl_protected) {
3682 /* If the DACL is protected it means we must
3683 * not overwrite an existing ACE entry with the
3684 * same SID. This is order N^2. Ouch :-(. JRA. */
3686 for (k = 0; k < psd->dacl->num_aces; k++) {
3687 if (sid_equal(&psd->dacl->aces[k].trustee,
3692 if (k < psd->dacl->num_aces) {
3693 /* SID matched. Ignore. */
3694 DEBUG(10,("append_parent_acl: path %s "
3695 "ignoring ACE with protected sid %s "
3698 sid_string_dbg(&se->trustee),
3704 sec_ace_copy(&new_ace[i], se);
3705 if (se->flags & SEC_ACE_FLAG_NO_PROPAGATE_INHERIT) {
3706 new_ace[i].flags &= ~(SEC_ACE_FLAG_VALID_INHERIT);
3708 new_ace[i].flags |= SEC_ACE_FLAG_INHERITED_ACE;
3710 if (fsp->is_directory) {
3712 * Strip off any inherit only. It's applied.
3714 new_ace[i].flags &= ~(SEC_ACE_FLAG_INHERIT_ONLY);
3715 if (se->flags & SEC_ACE_FLAG_NO_PROPAGATE_INHERIT) {
3716 /* No further inheritance. */
3718 ~(SEC_ACE_FLAG_CONTAINER_INHERIT|
3719 SEC_ACE_FLAG_OBJECT_INHERIT);
3723 * Strip off any container or inherit
3724 * flags, they can't apply to objects.
3726 new_ace[i].flags &= ~(SEC_ACE_FLAG_CONTAINER_INHERIT|
3727 SEC_ACE_FLAG_INHERIT_ONLY|
3728 SEC_ACE_FLAG_NO_PROPAGATE_INHERIT);
3732 DEBUG(10,("append_parent_acl: path %s "
3733 "inheriting ACE with sid %s "
3736 sid_string_dbg(&se->trustee),
3740 psd->dacl->aces = new_ace;
3741 psd->dacl->num_aces = i;
3742 psd->type &= ~(SE_DESC_DACL_AUTO_INHERITED|
3743 SE_DESC_DACL_AUTO_INHERIT_REQ);
3750 /****************************************************************************
3751 Reply to set a security descriptor on an fsp. security_info_sent is the
3752 description of the following NT ACL.
3753 This should be the only external function needed for the UNIX style set ACL.
3754 ****************************************************************************/
3756 NTSTATUS set_nt_acl(files_struct *fsp, uint32 security_info_sent, const SEC_DESC *psd_orig)
3758 connection_struct *conn = fsp->conn;
3759 uid_t user = (uid_t)-1;
3760 gid_t grp = (gid_t)-1;
3761 DOM_SID file_owner_sid;
3762 DOM_SID file_grp_sid;
3763 canon_ace *file_ace_list = NULL;
3764 canon_ace *dir_ace_list = NULL;
3765 bool acl_perms = False;
3766 mode_t orig_mode = (mode_t)0;
3768 bool set_acl_as_root = false;
3769 bool acl_set_support = false;
3771 SEC_DESC *psd = NULL;
3773 DEBUG(10,("set_nt_acl: called for file %s\n",
3776 if (!CAN_WRITE(conn)) {
3777 DEBUG(10,("set acl rejected on read-only share\n"));
3778 return NT_STATUS_MEDIA_WRITE_PROTECTED;
3782 return NT_STATUS_INVALID_PARAMETER;
3785 psd = dup_sec_desc(talloc_tos(), psd_orig);
3787 return NT_STATUS_NO_MEMORY;
3791 * Get the current state of the file.
3794 status = vfs_stat_fsp(fsp);
3795 if (!NT_STATUS_IS_OK(status)) {
3799 /* Save the original element we check against. */
3800 orig_mode = fsp->fsp_name->st.st_ex_mode;
3803 * Unpack the user/group/world id's.
3806 /* POSIX can't cope with missing owner/group. */
3807 if ((security_info_sent & SECINFO_OWNER) && (psd->owner_sid == NULL)) {
3808 security_info_sent &= ~SECINFO_OWNER;
3810 if ((security_info_sent & SECINFO_GROUP) && (psd->group_sid == NULL)) {
3811 security_info_sent &= ~SECINFO_GROUP;
3814 status = unpack_nt_owners( SNUM(conn), &user, &grp, security_info_sent, psd);
3815 if (!NT_STATUS_IS_OK(status)) {
3820 * Do we need to chown ? If so this must be done first as the incoming
3821 * CREATOR_OWNER acl will be relative to the *new* owner, not the old.
3825 if (((user != (uid_t)-1) && (fsp->fsp_name->st.st_ex_uid != user)) ||
3826 (( grp != (gid_t)-1) && (fsp->fsp_name->st.st_ex_gid != grp))) {
3828 DEBUG(3,("set_nt_acl: chown %s. uid = %u, gid = %u.\n",
3829 fsp_str_dbg(fsp), (unsigned int)user,
3830 (unsigned int)grp));
3832 if(try_chown(fsp->conn, fsp->fsp_name, user, grp) == -1) {
3833 DEBUG(3,("set_nt_acl: chown %s, %u, %u failed. Error "
3834 "= %s.\n", fsp_str_dbg(fsp),
3835 (unsigned int)user, (unsigned int)grp,
3837 if (errno == EPERM) {
3838 return NT_STATUS_INVALID_OWNER;
3840 return map_nt_error_from_unix(errno);
3844 * Recheck the current state of the file, which may have changed.
3845 * (suid/sgid bits, for instance)
3848 status = vfs_stat_fsp(fsp);
3849 if (!NT_STATUS_IS_OK(status)) {
3853 /* Save the original element we check against. */
3854 orig_mode = fsp->fsp_name->st.st_ex_mode;
3856 /* If we successfully chowned, we know we must
3857 * be able to set the acl, so do it as root.
3859 set_acl_as_root = true;
3862 create_file_sids(&fsp->fsp_name->st, &file_owner_sid, &file_grp_sid);
3864 if((security_info_sent & SECINFO_DACL) &&
3865 (psd->type & SEC_DESC_DACL_PRESENT) &&
3866 (psd->dacl == NULL)) {
3869 /* We can't have NULL DACL in POSIX.
3870 Use owner/group/Everyone -> full access. */
3872 init_sec_ace(&ace[0],
3874 SEC_ACE_TYPE_ACCESS_ALLOWED,
3877 init_sec_ace(&ace[1],
3879 SEC_ACE_TYPE_ACCESS_ALLOWED,
3882 init_sec_ace(&ace[2],
3884 SEC_ACE_TYPE_ACCESS_ALLOWED,
3887 psd->dacl = make_sec_acl(talloc_tos(),
3891 if (psd->dacl == NULL) {
3892 return NT_STATUS_NO_MEMORY;
3894 security_acl_map_generic(psd->dacl, &file_generic_mapping);
3897 acl_perms = unpack_canon_ace(fsp, &fsp->fsp_name->st, &file_owner_sid,
3898 &file_grp_sid, &file_ace_list,
3899 &dir_ace_list, security_info_sent, psd);
3901 /* Ignore W2K traverse DACL set. */
3902 if (!file_ace_list && !dir_ace_list) {
3903 return NT_STATUS_OK;
3907 DEBUG(3,("set_nt_acl: cannot set permissions\n"));
3908 free_canon_ace_list(file_ace_list);
3909 free_canon_ace_list(dir_ace_list);
3910 return NT_STATUS_ACCESS_DENIED;
3914 * Only change security if we got a DACL.
3917 if(!(security_info_sent & DACL_SECURITY_INFORMATION) || (psd->dacl == NULL)) {
3918 free_canon_ace_list(file_ace_list);
3919 free_canon_ace_list(dir_ace_list);
3920 return NT_STATUS_OK;
3924 * Try using the POSIX ACL set first. Fall back to chmod if
3925 * we have no ACL support on this filesystem.
3928 if (acl_perms && file_ace_list) {
3929 if (set_acl_as_root) {
3932 ret = set_canon_ace_list(fsp, file_ace_list, false,
3933 &fsp->fsp_name->st, &acl_set_support);
3934 if (set_acl_as_root) {
3937 if (acl_set_support && ret == false) {
3938 DEBUG(3,("set_nt_acl: failed to set file acl on file "
3939 "%s (%s).\n", fsp_str_dbg(fsp),
3941 free_canon_ace_list(file_ace_list);
3942 free_canon_ace_list(dir_ace_list);
3943 return map_nt_error_from_unix(errno);
3947 if (acl_perms && acl_set_support && fsp->is_directory) {
3949 if (set_acl_as_root) {
3952 ret = set_canon_ace_list(fsp, dir_ace_list, true,
3955 if (set_acl_as_root) {
3959 DEBUG(3,("set_nt_acl: failed to set default "
3960 "acl on directory %s (%s).\n",
3961 fsp_str_dbg(fsp), strerror(errno)));
3962 free_canon_ace_list(file_ace_list);
3963 free_canon_ace_list(dir_ace_list);
3964 return map_nt_error_from_unix(errno);
3970 * No default ACL - delete one if it exists.
3973 if (set_acl_as_root) {
3976 sret = SMB_VFS_SYS_ACL_DELETE_DEF_FILE(conn,
3977 fsp->fsp_name->base_name);
3978 if (set_acl_as_root) {
3982 if (acl_group_override(conn, fsp->fsp_name)) {
3983 DEBUG(5,("set_nt_acl: acl group "
3984 "control on and current user "
3985 "in file %s primary group. "
3986 "Override delete_def_acl\n",
3991 SMB_VFS_SYS_ACL_DELETE_DEF_FILE(
3993 fsp->fsp_name->base_name);
3998 DEBUG(3,("set_nt_acl: sys_acl_delete_def_file failed (%s)\n", strerror(errno)));
3999 free_canon_ace_list(file_ace_list);
4000 free_canon_ace_list(dir_ace_list);
4001 return map_nt_error_from_unix(errno);
4007 if (acl_set_support) {
4008 if (set_acl_as_root) {
4011 store_inheritance_attributes(fsp,
4015 if (set_acl_as_root) {
4021 * If we cannot set using POSIX ACLs we fall back to checking if we need to chmod.
4024 if(!acl_set_support && acl_perms) {
4027 if (!convert_canon_ace_to_posix_perms( fsp, file_ace_list, &posix_perms)) {
4028 free_canon_ace_list(file_ace_list);
4029 free_canon_ace_list(dir_ace_list);
4030 DEBUG(3,("set_nt_acl: failed to convert file acl to "
4031 "posix permissions for file %s.\n",
4033 return NT_STATUS_ACCESS_DENIED;
4036 if (orig_mode != posix_perms) {
4039 DEBUG(3,("set_nt_acl: chmod %s. perms = 0%o.\n",
4040 fsp_str_dbg(fsp), (unsigned int)posix_perms));
4042 if (set_acl_as_root) {
4045 sret = SMB_VFS_CHMOD(conn, fsp->fsp_name->base_name,
4047 if (set_acl_as_root) {
4051 if (acl_group_override(conn, fsp->fsp_name)) {
4052 DEBUG(5,("set_nt_acl: acl group "
4053 "control on and current user "
4054 "in file %s primary group. "
4059 sret = SMB_VFS_CHMOD(conn,
4060 fsp->fsp_name->base_name,
4066 DEBUG(3,("set_nt_acl: chmod %s, 0%o "
4067 "failed. Error = %s.\n",
4069 (unsigned int)posix_perms,
4071 free_canon_ace_list(file_ace_list);
4072 free_canon_ace_list(dir_ace_list);
4073 return map_nt_error_from_unix(errno);
4079 free_canon_ace_list(file_ace_list);
4080 free_canon_ace_list(dir_ace_list);
4082 /* Ensure the stat struct in the fsp is correct. */
4083 status = vfs_stat_fsp(fsp);
4085 return NT_STATUS_OK;
4088 /****************************************************************************
4089 Get the actual group bits stored on a file with an ACL. Has no effect if
4090 the file has no ACL. Needed in dosmode code where the stat() will return
4091 the mask bits, not the real group bits, for a file with an ACL.
4092 ****************************************************************************/
4094 int get_acl_group_bits( connection_struct *conn, const char *fname, mode_t *mode )
4096 int entry_id = SMB_ACL_FIRST_ENTRY;
4097 SMB_ACL_ENTRY_T entry;
4098 SMB_ACL_T posix_acl;
4101 posix_acl = SMB_VFS_SYS_ACL_GET_FILE(conn, fname, SMB_ACL_TYPE_ACCESS);
4102 if (posix_acl == (SMB_ACL_T)NULL)
4105 while (SMB_VFS_SYS_ACL_GET_ENTRY(conn, posix_acl, entry_id, &entry) == 1) {
4106 SMB_ACL_TAG_T tagtype;
4107 SMB_ACL_PERMSET_T permset;
4109 entry_id = SMB_ACL_NEXT_ENTRY;
4111 if (SMB_VFS_SYS_ACL_GET_TAG_TYPE(conn, entry, &tagtype) ==-1)
4114 if (tagtype == SMB_ACL_GROUP_OBJ) {
4115 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, entry, &permset) == -1) {
4118 *mode &= ~(S_IRGRP|S_IWGRP|S_IXGRP);
4119 *mode |= (SMB_VFS_SYS_ACL_GET_PERM(conn, permset, SMB_ACL_READ) ? S_IRGRP : 0);
4120 *mode |= (SMB_VFS_SYS_ACL_GET_PERM(conn, permset, SMB_ACL_WRITE) ? S_IWGRP : 0);
4121 *mode |= (SMB_VFS_SYS_ACL_GET_PERM(conn, permset, SMB_ACL_EXECUTE) ? S_IXGRP : 0);
4127 SMB_VFS_SYS_ACL_FREE_ACL(conn, posix_acl);
4131 /****************************************************************************
4132 Do a chmod by setting the ACL USER_OBJ, GROUP_OBJ and OTHER bits in an ACL
4133 and set the mask to rwx. Needed to preserve complex ACLs set by NT.
4134 ****************************************************************************/
4136 static int chmod_acl_internals( connection_struct *conn, SMB_ACL_T posix_acl, mode_t mode)
4138 int entry_id = SMB_ACL_FIRST_ENTRY;
4139 SMB_ACL_ENTRY_T entry;
4140 int num_entries = 0;
4142 while ( SMB_VFS_SYS_ACL_GET_ENTRY(conn, posix_acl, entry_id, &entry) == 1) {
4143 SMB_ACL_TAG_T tagtype;
4144 SMB_ACL_PERMSET_T permset;
4147 entry_id = SMB_ACL_NEXT_ENTRY;
4149 if (SMB_VFS_SYS_ACL_GET_TAG_TYPE(conn, entry, &tagtype) == -1)
4152 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, entry, &permset) == -1)
4158 case SMB_ACL_USER_OBJ:
4159 perms = unix_perms_to_acl_perms(mode, S_IRUSR, S_IWUSR, S_IXUSR);
4161 case SMB_ACL_GROUP_OBJ:
4162 perms = unix_perms_to_acl_perms(mode, S_IRGRP, S_IWGRP, S_IXGRP);
4166 * FIXME: The ACL_MASK entry permissions should really be set to
4167 * the union of the permissions of all ACL_USER,
4168 * ACL_GROUP_OBJ, and ACL_GROUP entries. That's what
4169 * acl_calc_mask() does, but Samba ACLs doesn't provide it.
4171 perms = S_IRUSR|S_IWUSR|S_IXUSR;
4174 perms = unix_perms_to_acl_perms(mode, S_IROTH, S_IWOTH, S_IXOTH);
4180 if (map_acl_perms_to_permset(conn, perms, &permset) == -1)
4183 if (SMB_VFS_SYS_ACL_SET_PERMSET(conn, entry, permset) == -1)
4188 * If this is a simple 3 element ACL or no elements then it's a standard
4189 * UNIX permission set. Just use chmod...
4192 if ((num_entries == 3) || (num_entries == 0))
4198 /****************************************************************************
4199 Get the access ACL of FROM, do a chmod by setting the ACL USER_OBJ,
4200 GROUP_OBJ and OTHER bits in an ACL and set the mask to rwx. Set the
4201 resulting ACL on TO. Note that name is in UNIX character set.
4202 ****************************************************************************/
4204 static int copy_access_posix_acl(connection_struct *conn, const char *from, const char *to, mode_t mode)
4206 SMB_ACL_T posix_acl = NULL;
4209 if ((posix_acl = SMB_VFS_SYS_ACL_GET_FILE(conn, from, SMB_ACL_TYPE_ACCESS)) == NULL)
4212 if ((ret = chmod_acl_internals(conn, posix_acl, mode)) == -1)
4215 ret = SMB_VFS_SYS_ACL_SET_FILE(conn, to, SMB_ACL_TYPE_ACCESS, posix_acl);
4219 SMB_VFS_SYS_ACL_FREE_ACL(conn, posix_acl);
4223 /****************************************************************************
4224 Do a chmod by setting the ACL USER_OBJ, GROUP_OBJ and OTHER bits in an ACL
4225 and set the mask to rwx. Needed to preserve complex ACLs set by NT.
4226 Note that name is in UNIX character set.
4227 ****************************************************************************/
4229 int chmod_acl(connection_struct *conn, const char *name, mode_t mode)
4231 return copy_access_posix_acl(conn, name, name, mode);
4234 /****************************************************************************
4235 Check for an existing default POSIX ACL on a directory.
4236 ****************************************************************************/
4238 static bool directory_has_default_posix_acl(connection_struct *conn, const char *fname)
4240 SMB_ACL_T def_acl = SMB_VFS_SYS_ACL_GET_FILE( conn, fname, SMB_ACL_TYPE_DEFAULT);
4241 bool has_acl = False;
4242 SMB_ACL_ENTRY_T entry;
4244 if (def_acl != NULL && (SMB_VFS_SYS_ACL_GET_ENTRY(conn, def_acl, SMB_ACL_FIRST_ENTRY, &entry) == 1)) {
4249 SMB_VFS_SYS_ACL_FREE_ACL(conn, def_acl);
4254 /****************************************************************************
4255 If the parent directory has no default ACL but it does have an Access ACL,
4256 inherit this Access ACL to file name.
4257 ****************************************************************************/
4259 int inherit_access_posix_acl(connection_struct *conn, const char *inherit_from_dir,
4260 const char *name, mode_t mode)
4262 if (directory_has_default_posix_acl(conn, inherit_from_dir))
4265 return copy_access_posix_acl(conn, inherit_from_dir, name, mode);
4268 /****************************************************************************
4269 Do an fchmod by setting the ACL USER_OBJ, GROUP_OBJ and OTHER bits in an ACL
4270 and set the mask to rwx. Needed to preserve complex ACLs set by NT.
4271 ****************************************************************************/
4273 int fchmod_acl(files_struct *fsp, mode_t mode)
4275 connection_struct *conn = fsp->conn;
4276 SMB_ACL_T posix_acl = NULL;
4279 if ((posix_acl = SMB_VFS_SYS_ACL_GET_FD(fsp)) == NULL)
4282 if ((ret = chmod_acl_internals(conn, posix_acl, mode)) == -1)
4285 ret = SMB_VFS_SYS_ACL_SET_FD(fsp, posix_acl);
4289 SMB_VFS_SYS_ACL_FREE_ACL(conn, posix_acl);
4293 /****************************************************************************
4294 Map from wire type to permset.
4295 ****************************************************************************/
4297 static bool unix_ex_wire_to_permset(connection_struct *conn, unsigned char wire_perm, SMB_ACL_PERMSET_T *p_permset)
4299 if (wire_perm & ~(SMB_POSIX_ACL_READ|SMB_POSIX_ACL_WRITE|SMB_POSIX_ACL_EXECUTE)) {
4303 if (SMB_VFS_SYS_ACL_CLEAR_PERMS(conn, *p_permset) == -1) {
4307 if (wire_perm & SMB_POSIX_ACL_READ) {
4308 if (SMB_VFS_SYS_ACL_ADD_PERM(conn, *p_permset, SMB_ACL_READ) == -1) {
4312 if (wire_perm & SMB_POSIX_ACL_WRITE) {
4313 if (SMB_VFS_SYS_ACL_ADD_PERM(conn, *p_permset, SMB_ACL_WRITE) == -1) {
4317 if (wire_perm & SMB_POSIX_ACL_EXECUTE) {
4318 if (SMB_VFS_SYS_ACL_ADD_PERM(conn, *p_permset, SMB_ACL_EXECUTE) == -1) {
4325 /****************************************************************************
4326 Map from wire type to tagtype.
4327 ****************************************************************************/
4329 static bool unix_ex_wire_to_tagtype(unsigned char wire_tt, SMB_ACL_TAG_T *p_tt)
4332 case SMB_POSIX_ACL_USER_OBJ:
4333 *p_tt = SMB_ACL_USER_OBJ;
4335 case SMB_POSIX_ACL_USER:
4336 *p_tt = SMB_ACL_USER;
4338 case SMB_POSIX_ACL_GROUP_OBJ:
4339 *p_tt = SMB_ACL_GROUP_OBJ;
4341 case SMB_POSIX_ACL_GROUP:
4342 *p_tt = SMB_ACL_GROUP;
4344 case SMB_POSIX_ACL_MASK:
4345 *p_tt = SMB_ACL_MASK;
4347 case SMB_POSIX_ACL_OTHER:
4348 *p_tt = SMB_ACL_OTHER;
4356 /****************************************************************************
4357 Create a new POSIX acl from wire permissions.
4358 FIXME ! How does the share mask/mode fit into this.... ?
4359 ****************************************************************************/
4361 static SMB_ACL_T create_posix_acl_from_wire(connection_struct *conn, uint16 num_acls, const char *pdata)
4364 SMB_ACL_T the_acl = SMB_VFS_SYS_ACL_INIT(conn, num_acls);
4366 if (the_acl == NULL) {
4370 for (i = 0; i < num_acls; i++) {
4371 SMB_ACL_ENTRY_T the_entry;
4372 SMB_ACL_PERMSET_T the_permset;
4373 SMB_ACL_TAG_T tag_type;
4375 if (SMB_VFS_SYS_ACL_CREATE_ENTRY(conn, &the_acl, &the_entry) == -1) {
4376 DEBUG(0,("create_posix_acl_from_wire: Failed to create entry %u. (%s)\n",
4377 i, strerror(errno) ));
4381 if (!unix_ex_wire_to_tagtype(CVAL(pdata,(i*SMB_POSIX_ACL_ENTRY_SIZE)), &tag_type)) {
4382 DEBUG(0,("create_posix_acl_from_wire: invalid wire tagtype %u on entry %u.\n",
4383 CVAL(pdata,(i*SMB_POSIX_ACL_ENTRY_SIZE)), i ));
4387 if (SMB_VFS_SYS_ACL_SET_TAG_TYPE(conn, the_entry, tag_type) == -1) {
4388 DEBUG(0,("create_posix_acl_from_wire: Failed to set tagtype on entry %u. (%s)\n",
4389 i, strerror(errno) ));
4393 /* Get the permset pointer from the new ACL entry. */
4394 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, the_entry, &the_permset) == -1) {
4395 DEBUG(0,("create_posix_acl_from_wire: Failed to get permset on entry %u. (%s)\n",
4396 i, strerror(errno) ));
4400 /* Map from wire to permissions. */
4401 if (!unix_ex_wire_to_permset(conn, CVAL(pdata,(i*SMB_POSIX_ACL_ENTRY_SIZE)+1), &the_permset)) {
4402 DEBUG(0,("create_posix_acl_from_wire: invalid permset %u on entry %u.\n",
4403 CVAL(pdata,(i*SMB_POSIX_ACL_ENTRY_SIZE) + 1), i ));
4407 /* Now apply to the new ACL entry. */
4408 if (SMB_VFS_SYS_ACL_SET_PERMSET(conn, the_entry, the_permset) == -1) {
4409 DEBUG(0,("create_posix_acl_from_wire: Failed to add permset on entry %u. (%s)\n",
4410 i, strerror(errno) ));
4414 if (tag_type == SMB_ACL_USER) {
4415 uint32 uidval = IVAL(pdata,(i*SMB_POSIX_ACL_ENTRY_SIZE)+2);
4416 uid_t uid = (uid_t)uidval;
4417 if (SMB_VFS_SYS_ACL_SET_QUALIFIER(conn, the_entry,(void *)&uid) == -1) {
4418 DEBUG(0,("create_posix_acl_from_wire: Failed to set uid %u on entry %u. (%s)\n",
4419 (unsigned int)uid, i, strerror(errno) ));
4424 if (tag_type == SMB_ACL_GROUP) {
4425 uint32 gidval = IVAL(pdata,(i*SMB_POSIX_ACL_ENTRY_SIZE)+2);
4426 gid_t gid = (uid_t)gidval;
4427 if (SMB_VFS_SYS_ACL_SET_QUALIFIER(conn, the_entry,(void *)&gid) == -1) {
4428 DEBUG(0,("create_posix_acl_from_wire: Failed to set gid %u on entry %u. (%s)\n",
4429 (unsigned int)gid, i, strerror(errno) ));
4439 if (the_acl != NULL) {
4440 SMB_VFS_SYS_ACL_FREE_ACL(conn, the_acl);
4445 /****************************************************************************
4446 Calls from UNIX extensions - Default POSIX ACL set.
4447 If num_def_acls == 0 and not a directory just return. If it is a directory
4448 and num_def_acls == 0 then remove the default acl. Else set the default acl
4450 ****************************************************************************/
4452 bool set_unix_posix_default_acl(connection_struct *conn, const char *fname, const SMB_STRUCT_STAT *psbuf,
4453 uint16 num_def_acls, const char *pdata)
4455 SMB_ACL_T def_acl = NULL;
4457 if (!S_ISDIR(psbuf->st_ex_mode)) {
4459 DEBUG(5,("set_unix_posix_default_acl: Can't set default ACL on non-directory file %s\n", fname ));
4467 if (!num_def_acls) {
4468 /* Remove the default ACL. */
4469 if (SMB_VFS_SYS_ACL_DELETE_DEF_FILE(conn, fname) == -1) {
4470 DEBUG(5,("set_unix_posix_default_acl: acl_delete_def_file failed on directory %s (%s)\n",
4471 fname, strerror(errno) ));
4477 if ((def_acl = create_posix_acl_from_wire(conn, num_def_acls, pdata)) == NULL) {
4481 if (SMB_VFS_SYS_ACL_SET_FILE(conn, fname, SMB_ACL_TYPE_DEFAULT, def_acl) == -1) {
4482 DEBUG(5,("set_unix_posix_default_acl: acl_set_file failed on directory %s (%s)\n",
4483 fname, strerror(errno) ));
4484 SMB_VFS_SYS_ACL_FREE_ACL(conn, def_acl);
4488 DEBUG(10,("set_unix_posix_default_acl: set default acl for file %s\n", fname ));
4489 SMB_VFS_SYS_ACL_FREE_ACL(conn, def_acl);
4493 /****************************************************************************
4494 Remove an ACL from a file. As we don't have acl_delete_entry() available
4495 we must read the current acl and copy all entries except MASK, USER and GROUP
4496 to a new acl, then set that. This (at least on Linux) causes any ACL to be
4498 FIXME ! How does the share mask/mode fit into this.... ?
4499 ****************************************************************************/
4501 static bool remove_posix_acl(connection_struct *conn, files_struct *fsp, const char *fname)
4503 SMB_ACL_T file_acl = NULL;
4504 int entry_id = SMB_ACL_FIRST_ENTRY;
4505 SMB_ACL_ENTRY_T entry;
4507 /* Create a new ACL with only 3 entries, u/g/w. */
4508 SMB_ACL_T new_file_acl = SMB_VFS_SYS_ACL_INIT(conn, 3);
4509 SMB_ACL_ENTRY_T user_ent = NULL;
4510 SMB_ACL_ENTRY_T group_ent = NULL;
4511 SMB_ACL_ENTRY_T other_ent = NULL;
4513 if (new_file_acl == NULL) {
4514 DEBUG(5,("remove_posix_acl: failed to init new ACL with 3 entries for file %s.\n", fname));
4518 /* Now create the u/g/w entries. */
4519 if (SMB_VFS_SYS_ACL_CREATE_ENTRY(conn, &new_file_acl, &user_ent) == -1) {
4520 DEBUG(5,("remove_posix_acl: Failed to create user entry for file %s. (%s)\n",
4521 fname, strerror(errno) ));
4524 if (SMB_VFS_SYS_ACL_SET_TAG_TYPE(conn, user_ent, SMB_ACL_USER_OBJ) == -1) {
4525 DEBUG(5,("remove_posix_acl: Failed to set user entry for file %s. (%s)\n",
4526 fname, strerror(errno) ));
4530 if (SMB_VFS_SYS_ACL_CREATE_ENTRY(conn, &new_file_acl, &group_ent) == -1) {
4531 DEBUG(5,("remove_posix_acl: Failed to create group entry for file %s. (%s)\n",
4532 fname, strerror(errno) ));
4535 if (SMB_VFS_SYS_ACL_SET_TAG_TYPE(conn, group_ent, SMB_ACL_GROUP_OBJ) == -1) {
4536 DEBUG(5,("remove_posix_acl: Failed to set group entry for file %s. (%s)\n",
4537 fname, strerror(errno) ));
4541 if (SMB_VFS_SYS_ACL_CREATE_ENTRY(conn, &new_file_acl, &other_ent) == -1) {
4542 DEBUG(5,("remove_posix_acl: Failed to create other entry for file %s. (%s)\n",
4543 fname, strerror(errno) ));
4546 if (SMB_VFS_SYS_ACL_SET_TAG_TYPE(conn, other_ent, SMB_ACL_OTHER) == -1) {
4547 DEBUG(5,("remove_posix_acl: Failed to set other entry for file %s. (%s)\n",
4548 fname, strerror(errno) ));
4552 /* Get the current file ACL. */
4553 if (fsp && fsp->fh->fd != -1) {
4554 file_acl = SMB_VFS_SYS_ACL_GET_FD(fsp);
4556 file_acl = SMB_VFS_SYS_ACL_GET_FILE( conn, fname, SMB_ACL_TYPE_ACCESS);
4559 if (file_acl == NULL) {
4560 /* This is only returned if an error occurred. Even for a file with
4561 no acl a u/g/w acl should be returned. */
4562 DEBUG(5,("remove_posix_acl: failed to get ACL from file %s (%s).\n",
4563 fname, strerror(errno) ));
4567 while ( SMB_VFS_SYS_ACL_GET_ENTRY(conn, file_acl, entry_id, &entry) == 1) {
4568 SMB_ACL_TAG_T tagtype;
4569 SMB_ACL_PERMSET_T permset;
4571 entry_id = SMB_ACL_NEXT_ENTRY;
4573 if (SMB_VFS_SYS_ACL_GET_TAG_TYPE(conn, entry, &tagtype) == -1) {
4574 DEBUG(5,("remove_posix_acl: failed to get tagtype from ACL on file %s (%s).\n",
4575 fname, strerror(errno) ));
4579 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, entry, &permset) == -1) {
4580 DEBUG(5,("remove_posix_acl: failed to get permset from ACL on file %s (%s).\n",
4581 fname, strerror(errno) ));
4585 if (tagtype == SMB_ACL_USER_OBJ) {
4586 if (SMB_VFS_SYS_ACL_SET_PERMSET(conn, user_ent, permset) == -1) {
4587 DEBUG(5,("remove_posix_acl: failed to set permset from ACL on file %s (%s).\n",
4588 fname, strerror(errno) ));
4590 } else if (tagtype == SMB_ACL_GROUP_OBJ) {
4591 if (SMB_VFS_SYS_ACL_SET_PERMSET(conn, group_ent, permset) == -1) {
4592 DEBUG(5,("remove_posix_acl: failed to set permset from ACL on file %s (%s).\n",
4593 fname, strerror(errno) ));
4595 } else if (tagtype == SMB_ACL_OTHER) {
4596 if (SMB_VFS_SYS_ACL_SET_PERMSET(conn, other_ent, permset) == -1) {
4597 DEBUG(5,("remove_posix_acl: failed to set permset from ACL on file %s (%s).\n",
4598 fname, strerror(errno) ));
4603 /* Set the new empty file ACL. */
4604 if (fsp && fsp->fh->fd != -1) {
4605 if (SMB_VFS_SYS_ACL_SET_FD(fsp, new_file_acl) == -1) {
4606 DEBUG(5,("remove_posix_acl: acl_set_file failed on %s (%s)\n",
4607 fname, strerror(errno) ));
4611 if (SMB_VFS_SYS_ACL_SET_FILE(conn, fname, SMB_ACL_TYPE_ACCESS, new_file_acl) == -1) {
4612 DEBUG(5,("remove_posix_acl: acl_set_file failed on %s (%s)\n",
4613 fname, strerror(errno) ));
4623 SMB_VFS_SYS_ACL_FREE_ACL(conn, file_acl);
4626 SMB_VFS_SYS_ACL_FREE_ACL(conn, new_file_acl);
4631 /****************************************************************************
4632 Calls from UNIX extensions - POSIX ACL set.
4633 If num_def_acls == 0 then read/modify/write acl after removing all entries
4634 except SMB_ACL_USER_OBJ, SMB_ACL_GROUP_OBJ, SMB_ACL_OTHER.
4635 ****************************************************************************/
4637 bool set_unix_posix_acl(connection_struct *conn, files_struct *fsp, const char *fname, uint16 num_acls, const char *pdata)
4639 SMB_ACL_T file_acl = NULL;
4642 /* Remove the ACL from the file. */
4643 return remove_posix_acl(conn, fsp, fname);
4646 if ((file_acl = create_posix_acl_from_wire(conn, num_acls, pdata)) == NULL) {
4650 if (fsp && fsp->fh->fd != -1) {
4651 /* The preferred way - use an open fd. */
4652 if (SMB_VFS_SYS_ACL_SET_FD(fsp, file_acl) == -1) {
4653 DEBUG(5,("set_unix_posix_acl: acl_set_file failed on %s (%s)\n",
4654 fname, strerror(errno) ));
4655 SMB_VFS_SYS_ACL_FREE_ACL(conn, file_acl);
4659 if (SMB_VFS_SYS_ACL_SET_FILE(conn, fname, SMB_ACL_TYPE_ACCESS, file_acl) == -1) {
4660 DEBUG(5,("set_unix_posix_acl: acl_set_file failed on %s (%s)\n",
4661 fname, strerror(errno) ));
4662 SMB_VFS_SYS_ACL_FREE_ACL(conn, file_acl);
4667 DEBUG(10,("set_unix_posix_acl: set acl for file %s\n", fname ));
4668 SMB_VFS_SYS_ACL_FREE_ACL(conn, file_acl);
4672 /********************************************************************
4673 Pull the NT ACL from a file on disk or the OpenEventlog() access
4674 check. Caller is responsible for freeing the returned security
4675 descriptor via TALLOC_FREE(). This is designed for dealing with
4676 user space access checks in smbd outside of the VFS. For example,
4677 checking access rights in OpenEventlog().
4679 Assume we are dealing with files (for now)
4680 ********************************************************************/
4682 SEC_DESC *get_nt_acl_no_snum( TALLOC_CTX *ctx, const char *fname)
4684 SEC_DESC *psd, *ret_sd;
4685 connection_struct *conn;
4687 struct fd_handle fh;
4690 conn = TALLOC_ZERO_P(ctx, connection_struct);
4692 DEBUG(0, ("talloc failed\n"));
4696 if (!(conn->params = TALLOC_P(conn, struct share_params))) {
4697 DEBUG(0,("get_nt_acl_no_snum: talloc() failed!\n"));
4702 conn->params->service = -1;
4704 set_conn_connectpath(conn, "/");
4706 if (!smbd_vfs_init(conn)) {
4707 DEBUG(0,("get_nt_acl_no_snum: Unable to create a fake connection struct!\n"));
4712 ZERO_STRUCT( finfo );
4720 status = create_synthetic_smb_fname(talloc_tos(), fname, NULL, NULL,
4722 if (!NT_STATUS_IS_OK(status)) {
4727 if (!NT_STATUS_IS_OK(SMB_VFS_FGET_NT_ACL( &finfo, DACL_SECURITY_INFORMATION, &psd))) {
4728 DEBUG(0,("get_nt_acl_no_snum: get_nt_acl returned zero.\n"));
4729 TALLOC_FREE(finfo.fsp_name);
4734 ret_sd = dup_sec_desc( ctx, psd );
4736 TALLOC_FREE(finfo.fsp_name);
4742 /* Stolen shamelessly from pvfs_default_acl() in source4 :-). */
4744 NTSTATUS make_default_filesystem_acl(TALLOC_CTX *ctx,
4746 SMB_STRUCT_STAT *psbuf,
4749 struct dom_sid owner_sid, group_sid;
4752 uint32_t access_mask = 0;
4753 mode_t mode = psbuf->st_ex_mode;
4754 SEC_ACL *new_dacl = NULL;
4757 DEBUG(10,("make_default_filesystem_acl: file %s mode = 0%o\n",
4760 uid_to_sid(&owner_sid, psbuf->st_ex_uid);
4761 gid_to_sid(&group_sid, psbuf->st_ex_gid);
4764 We provide up to 4 ACEs
4771 if (mode & S_IRUSR) {
4772 if (mode & S_IWUSR) {
4773 access_mask |= SEC_RIGHTS_FILE_ALL;
4775 access_mask |= SEC_RIGHTS_FILE_READ | SEC_FILE_EXECUTE;
4778 if (mode & S_IWUSR) {
4779 access_mask |= SEC_RIGHTS_FILE_WRITE | SEC_STD_DELETE;
4782 init_sec_ace(&aces[idx],
4784 SEC_ACE_TYPE_ACCESS_ALLOWED,
4790 if (mode & S_IRGRP) {
4791 access_mask |= SEC_RIGHTS_FILE_READ | SEC_FILE_EXECUTE;
4793 if (mode & S_IWGRP) {
4794 /* note that delete is not granted - this matches posix behaviour */
4795 access_mask |= SEC_RIGHTS_FILE_WRITE;
4798 init_sec_ace(&aces[idx],
4800 SEC_ACE_TYPE_ACCESS_ALLOWED,
4807 if (mode & S_IROTH) {
4808 access_mask |= SEC_RIGHTS_FILE_READ | SEC_FILE_EXECUTE;
4810 if (mode & S_IWOTH) {
4811 access_mask |= SEC_RIGHTS_FILE_WRITE;
4814 init_sec_ace(&aces[idx],
4816 SEC_ACE_TYPE_ACCESS_ALLOWED,
4822 init_sec_ace(&aces[idx],
4824 SEC_ACE_TYPE_ACCESS_ALLOWED,
4825 SEC_RIGHTS_FILE_ALL,
4829 new_dacl = make_sec_acl(ctx,
4835 return NT_STATUS_NO_MEMORY;
4838 *ppdesc = make_sec_desc(ctx,
4839 SECURITY_DESCRIPTOR_REVISION_1,
4840 SEC_DESC_SELF_RELATIVE|SEC_DESC_DACL_PRESENT,
4847 return NT_STATUS_NO_MEMORY;
4849 return NT_STATUS_OK;