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;
185 for (ace_list = file_ace_list; ace_list; ace_list = ace_list->next) {
189 for (ace_list = dir_ace_list; ace_list; ace_list = ace_list->next) {
193 DEBUG(10,("create_pai_buf_v2: num_entries = %u, num_def_entries = %u\n", num_entries, num_def_entries ));
195 *store_size = PAI_V2_ENTRIES_BASE +
196 ((num_entries + num_def_entries)*PAI_V2_ENTRY_LENGTH);
198 pai_buf = (char *)SMB_MALLOC(*store_size);
203 /* Set up the header. */
204 memset(pai_buf, '\0', PAI_V2_ENTRIES_BASE);
205 SCVAL(pai_buf,PAI_VERSION_OFFSET,PAI_V2_VERSION);
206 SSVAL(pai_buf,PAI_V2_TYPE_OFFSET, sd_type);
207 SSVAL(pai_buf,PAI_V2_NUM_ENTRIES_OFFSET,num_entries);
208 SSVAL(pai_buf,PAI_V2_NUM_DEFAULT_ENTRIES_OFFSET,num_def_entries);
210 entry_offset = pai_buf + PAI_V2_ENTRIES_BASE;
212 for (ace_list = file_ace_list; ace_list; ace_list = ace_list->next) {
213 uint8_t type_val = (uint8_t)ace_list->owner_type;
214 uint32_t entry_val = get_entry_val(ace_list);
216 SCVAL(entry_offset,0,ace_list->ace_flags);
217 SCVAL(entry_offset,1,type_val);
218 SIVAL(entry_offset,2,entry_val);
219 entry_offset += PAI_V2_ENTRY_LENGTH;
222 for (ace_list = dir_ace_list; ace_list; ace_list = ace_list->next) {
223 uint8_t type_val = (uint8_t)ace_list->owner_type;
224 uint32_t entry_val = get_entry_val(ace_list);
226 SCVAL(entry_offset,0,ace_list->ace_flags);
227 SCVAL(entry_offset,1,type_val);
228 SIVAL(entry_offset,2,entry_val);
229 entry_offset += PAI_V2_ENTRY_LENGTH;
235 /************************************************************************
236 Store the user.SAMBA_PAI attribute on disk.
237 ************************************************************************/
239 static void store_inheritance_attributes(files_struct *fsp,
240 canon_ace *file_ace_list,
241 canon_ace *dir_ace_list,
248 if (!lp_map_acl_inherit(SNUM(fsp->conn))) {
252 pai_buf = create_pai_buf_v2(file_ace_list, dir_ace_list,
253 sd_type, &store_size);
255 if (fsp->fh->fd != -1) {
256 ret = SMB_VFS_FSETXATTR(fsp, SAMBA_POSIX_INHERITANCE_EA_NAME,
257 pai_buf, store_size, 0);
259 ret = SMB_VFS_SETXATTR(fsp->conn,fsp->fsp_name, SAMBA_POSIX_INHERITANCE_EA_NAME,
260 pai_buf, store_size, 0);
265 DEBUG(10,("store_inheritance_attribute: type 0x%x for file %s\n",
266 (unsigned int)sd_type,
269 if (ret == -1 && !no_acl_syscall_error(errno)) {
270 DEBUG(1,("store_inheritance_attribute: Error %s\n", strerror(errno) ));
274 /************************************************************************
275 Delete the in memory inheritance info.
276 ************************************************************************/
278 static void free_inherited_info(struct pai_val *pal)
281 struct pai_entry *paie, *paie_next;
282 for (paie = pal->entry_list; paie; paie = paie_next) {
283 paie_next = paie->next;
286 for (paie = pal->def_entry_list; paie; paie = paie_next) {
287 paie_next = paie->next;
294 /************************************************************************
295 Get any stored ACE flags.
296 ************************************************************************/
298 static uint16_t get_pai_flags(struct pai_val *pal, canon_ace *ace_entry, bool default_ace)
300 struct pai_entry *paie;
306 /* If the entry exists it is inherited. */
307 for (paie = (default_ace ? pal->def_entry_list : pal->entry_list); paie; paie = paie->next) {
308 if (ace_entry->owner_type == paie->owner_type &&
309 get_entry_val(ace_entry) == get_pai_entry_val(paie))
310 return paie->ace_flags;
315 /************************************************************************
316 Ensure an attribute just read is valid - v1.
317 ************************************************************************/
319 static bool check_pai_ok_v1(const char *pai_buf, size_t pai_buf_data_size)
322 uint16 num_def_entries;
324 if (pai_buf_data_size < PAI_V1_ENTRIES_BASE) {
325 /* Corrupted - too small. */
329 if (CVAL(pai_buf,PAI_VERSION_OFFSET) != PAI_V1_VERSION) {
333 num_entries = SVAL(pai_buf,PAI_V1_NUM_ENTRIES_OFFSET);
334 num_def_entries = SVAL(pai_buf,PAI_V1_NUM_DEFAULT_ENTRIES_OFFSET);
336 /* Check the entry lists match. */
337 /* Each entry is 5 bytes (type plus 4 bytes of uid or gid). */
339 if (((num_entries + num_def_entries)*PAI_V1_ENTRY_LENGTH) +
340 PAI_V1_ENTRIES_BASE != pai_buf_data_size) {
347 /************************************************************************
348 Ensure an attribute just read is valid - v2.
349 ************************************************************************/
351 static bool check_pai_ok_v2(const char *pai_buf, size_t pai_buf_data_size)
354 uint16 num_def_entries;
356 if (pai_buf_data_size < PAI_V2_ENTRIES_BASE) {
357 /* Corrupted - too small. */
361 if (CVAL(pai_buf,PAI_VERSION_OFFSET) != PAI_V2_VERSION) {
365 num_entries = SVAL(pai_buf,PAI_V2_NUM_ENTRIES_OFFSET);
366 num_def_entries = SVAL(pai_buf,PAI_V2_NUM_DEFAULT_ENTRIES_OFFSET);
368 /* Check the entry lists match. */
369 /* Each entry is 6 bytes (flags + type + 4 bytes of uid or gid). */
371 if (((num_entries + num_def_entries)*PAI_V2_ENTRY_LENGTH) +
372 PAI_V2_ENTRIES_BASE != pai_buf_data_size) {
379 /************************************************************************
381 ************************************************************************/
383 static bool get_pai_owner_type(struct pai_entry *paie, const char *entry_offset)
385 paie->owner_type = (enum ace_owner)CVAL(entry_offset,0);
386 switch( paie->owner_type) {
388 paie->unix_ug.uid = (uid_t)IVAL(entry_offset,1);
389 DEBUG(10,("get_pai_owner_type: uid = %u\n",
390 (unsigned int)paie->unix_ug.uid ));
393 paie->unix_ug.gid = (gid_t)IVAL(entry_offset,1);
394 DEBUG(10,("get_pai_owner_type: gid = %u\n",
395 (unsigned int)paie->unix_ug.gid ));
398 paie->unix_ug.world = -1;
399 DEBUG(10,("get_pai_owner_type: world ace\n"));
407 /************************************************************************
409 ************************************************************************/
411 static const char *create_pai_v1_entries(struct pai_val *paiv,
412 const char *entry_offset,
417 for (i = 0; i < paiv->num_entries; i++) {
418 struct pai_entry *paie = SMB_MALLOC_P(struct pai_entry);
423 paie->ace_flags = SEC_ACE_FLAG_INHERITED_ACE;
424 if (!get_pai_owner_type(paie, entry_offset)) {
429 DLIST_ADD(paiv->entry_list, paie);
431 DLIST_ADD(paiv->def_entry_list, paie);
433 entry_offset += PAI_V1_ENTRY_LENGTH;
438 /************************************************************************
439 Convert to in-memory format from version 1.
440 ************************************************************************/
442 static struct pai_val *create_pai_val_v1(const char *buf, size_t size)
444 const char *entry_offset;
445 struct pai_val *paiv = NULL;
447 if (!check_pai_ok_v1(buf, size)) {
451 paiv = SMB_MALLOC_P(struct pai_val);
456 memset(paiv, '\0', sizeof(struct pai_val));
458 paiv->sd_type = (CVAL(buf,PAI_V1_FLAG_OFFSET) == PAI_V1_ACL_FLAG_PROTECTED) ?
459 SE_DESC_DACL_PROTECTED : 0;
461 paiv->num_entries = SVAL(buf,PAI_V1_NUM_ENTRIES_OFFSET);
462 paiv->num_def_entries = SVAL(buf,PAI_V1_NUM_DEFAULT_ENTRIES_OFFSET);
464 entry_offset = buf + PAI_V1_ENTRIES_BASE;
466 DEBUG(10,("create_pai_val: num_entries = %u, num_def_entries = %u\n",
467 paiv->num_entries, paiv->num_def_entries ));
469 entry_offset = create_pai_v1_entries(paiv, entry_offset, false);
470 if (entry_offset == NULL) {
471 free_inherited_info(paiv);
474 entry_offset = create_pai_v1_entries(paiv, entry_offset, true);
475 if (entry_offset == NULL) {
476 free_inherited_info(paiv);
483 /************************************************************************
485 ************************************************************************/
487 static const char *create_pai_v2_entries(struct pai_val *paiv,
488 const char *entry_offset,
493 for (i = 0; i < paiv->num_entries; i++) {
494 struct pai_entry *paie = SMB_MALLOC_P(struct pai_entry);
499 paie->ace_flags = CVAL(entry_offset,0);
503 if (!get_pai_owner_type(paie, entry_offset)) {
507 DLIST_ADD(paiv->entry_list, paie);
509 DLIST_ADD(paiv->def_entry_list, paie);
511 entry_offset += PAI_V2_ENTRY_LENGTH;
516 /************************************************************************
517 Convert to in-memory format from version 2.
518 ************************************************************************/
520 static struct pai_val *create_pai_val_v2(const char *buf, size_t size)
522 const char *entry_offset;
523 struct pai_val *paiv = NULL;
525 if (!check_pai_ok_v2(buf, size)) {
529 paiv = SMB_MALLOC_P(struct pai_val);
534 memset(paiv, '\0', sizeof(struct pai_val));
536 paiv->sd_type = SVAL(buf,PAI_V2_TYPE_OFFSET);
538 paiv->num_entries = SVAL(buf,PAI_V2_NUM_ENTRIES_OFFSET);
539 paiv->num_def_entries = SVAL(buf,PAI_V2_NUM_DEFAULT_ENTRIES_OFFSET);
541 entry_offset = buf + PAI_V2_ENTRIES_BASE;
543 DEBUG(10,("create_pai_val_v2: num_entries = %u, num_def_entries = %u\n",
544 paiv->num_entries, paiv->num_def_entries ));
546 entry_offset = create_pai_v2_entries(paiv, entry_offset, false);
547 if (entry_offset == NULL) {
548 free_inherited_info(paiv);
551 entry_offset = create_pai_v2_entries(paiv, entry_offset, true);
552 if (entry_offset == NULL) {
553 free_inherited_info(paiv);
560 /************************************************************************
561 Convert to in-memory format - from either version 1 or 2.
562 ************************************************************************/
564 static struct pai_val *create_pai_val(const char *buf, size_t size)
569 if (CVAL(buf,PAI_VERSION_OFFSET) == PAI_V1_VERSION) {
570 return create_pai_val_v1(buf, size);
571 } else if (CVAL(buf,PAI_VERSION_OFFSET) == PAI_V2_VERSION) {
572 return create_pai_val_v2(buf, size);
578 /************************************************************************
579 Load the user.SAMBA_PAI attribute.
580 ************************************************************************/
582 static struct pai_val *fload_inherited_info(files_struct *fsp)
585 size_t pai_buf_size = 1024;
586 struct pai_val *paiv = NULL;
589 if (!lp_map_acl_inherit(SNUM(fsp->conn))) {
593 if ((pai_buf = (char *)SMB_MALLOC(pai_buf_size)) == NULL) {
598 if (fsp->fh->fd != -1) {
599 ret = SMB_VFS_FGETXATTR(fsp, SAMBA_POSIX_INHERITANCE_EA_NAME,
600 pai_buf, pai_buf_size);
602 ret = SMB_VFS_GETXATTR(fsp->conn,fsp->fsp_name,SAMBA_POSIX_INHERITANCE_EA_NAME,
603 pai_buf, pai_buf_size);
607 if (errno != ERANGE) {
610 /* Buffer too small - enlarge it. */
613 if (pai_buf_size > 1024*1024) {
614 return NULL; /* Limit malloc to 1mb. */
616 if ((pai_buf = (char *)SMB_MALLOC(pai_buf_size)) == NULL)
621 DEBUG(10,("load_inherited_info: ret = %lu for file %s\n", (unsigned long)ret, fsp->fsp_name));
624 /* No attribute or not supported. */
626 if (errno != ENOATTR)
627 DEBUG(10,("load_inherited_info: Error %s\n", strerror(errno) ));
630 DEBUG(10,("load_inherited_info: Error %s\n", strerror(errno) ));
636 paiv = create_pai_val(pai_buf, ret);
639 DEBUG(10,("load_inherited_info: ACL type is 0x%x for file %s\n",
640 (unsigned int)paiv->sd_type,
648 /************************************************************************
649 Load the user.SAMBA_PAI attribute.
650 ************************************************************************/
652 static struct pai_val *load_inherited_info(const struct connection_struct *conn,
656 size_t pai_buf_size = 1024;
657 struct pai_val *paiv = NULL;
660 if (!lp_map_acl_inherit(SNUM(conn))) {
664 if ((pai_buf = (char *)SMB_MALLOC(pai_buf_size)) == NULL) {
669 ret = SMB_VFS_GETXATTR(conn, fname,
670 SAMBA_POSIX_INHERITANCE_EA_NAME,
671 pai_buf, pai_buf_size);
674 if (errno != ERANGE) {
677 /* Buffer too small - enlarge it. */
680 if (pai_buf_size > 1024*1024) {
681 return NULL; /* Limit malloc to 1mb. */
683 if ((pai_buf = (char *)SMB_MALLOC(pai_buf_size)) == NULL)
688 DEBUG(10,("load_inherited_info: ret = %lu for file %s\n", (unsigned long)ret, fname));
691 /* No attribute or not supported. */
693 if (errno != ENOATTR)
694 DEBUG(10,("load_inherited_info: Error %s\n", strerror(errno) ));
697 DEBUG(10,("load_inherited_info: Error %s\n", strerror(errno) ));
703 paiv = create_pai_val(pai_buf, ret);
706 DEBUG(10,("load_inherited_info: ACL type 0x%x for file %s\n",
707 (unsigned int)paiv->sd_type,
715 /****************************************************************************
716 Functions to manipulate the internal ACE format.
717 ****************************************************************************/
719 /****************************************************************************
720 Count a linked list of canonical ACE entries.
721 ****************************************************************************/
723 static size_t count_canon_ace_list( canon_ace *l_head )
728 for (ace = l_head; ace; ace = ace->next)
734 /****************************************************************************
735 Free a linked list of canonical ACE entries.
736 ****************************************************************************/
738 static void free_canon_ace_list( canon_ace *l_head )
740 canon_ace *list, *next;
742 for (list = l_head; list; list = next) {
744 DLIST_REMOVE(l_head, list);
749 /****************************************************************************
750 Function to duplicate a canon_ace entry.
751 ****************************************************************************/
753 static canon_ace *dup_canon_ace( canon_ace *src_ace)
755 canon_ace *dst_ace = SMB_MALLOC_P(canon_ace);
761 dst_ace->prev = dst_ace->next = NULL;
765 /****************************************************************************
766 Print out a canon ace.
767 ****************************************************************************/
769 static void print_canon_ace(canon_ace *pace, int num)
771 dbgtext( "canon_ace index %d. Type = %s ", num, pace->attr == ALLOW_ACE ? "allow" : "deny" );
772 dbgtext( "SID = %s ", sid_string_dbg(&pace->trustee));
773 if (pace->owner_type == UID_ACE) {
774 const char *u_name = uidtoname(pace->unix_ug.uid);
775 dbgtext( "uid %u (%s) ", (unsigned int)pace->unix_ug.uid, u_name );
776 } else if (pace->owner_type == GID_ACE) {
777 char *g_name = gidtoname(pace->unix_ug.gid);
778 dbgtext( "gid %u (%s) ", (unsigned int)pace->unix_ug.gid, g_name );
781 switch (pace->type) {
783 dbgtext( "SMB_ACL_USER ");
785 case SMB_ACL_USER_OBJ:
786 dbgtext( "SMB_ACL_USER_OBJ ");
789 dbgtext( "SMB_ACL_GROUP ");
791 case SMB_ACL_GROUP_OBJ:
792 dbgtext( "SMB_ACL_GROUP_OBJ ");
795 dbgtext( "SMB_ACL_OTHER ");
802 dbgtext( "ace_flags = 0x%x ", (unsigned int)pace->ace_flags);
804 dbgtext( "%c", pace->perms & S_IRUSR ? 'r' : '-');
805 dbgtext( "%c", pace->perms & S_IWUSR ? 'w' : '-');
806 dbgtext( "%c\n", pace->perms & S_IXUSR ? 'x' : '-');
809 /****************************************************************************
810 Print out a canon ace list.
811 ****************************************************************************/
813 static void print_canon_ace_list(const char *name, canon_ace *ace_list)
817 if( DEBUGLVL( 10 )) {
818 dbgtext( "print_canon_ace_list: %s\n", name );
819 for (;ace_list; ace_list = ace_list->next, count++)
820 print_canon_ace(ace_list, count );
824 /****************************************************************************
825 Map POSIX ACL perms to canon_ace permissions (a mode_t containing only S_(R|W|X)USR bits).
826 ****************************************************************************/
828 static mode_t convert_permset_to_mode_t(connection_struct *conn, SMB_ACL_PERMSET_T permset)
832 ret |= (SMB_VFS_SYS_ACL_GET_PERM(conn, permset, SMB_ACL_READ) ? S_IRUSR : 0);
833 ret |= (SMB_VFS_SYS_ACL_GET_PERM(conn, permset, SMB_ACL_WRITE) ? S_IWUSR : 0);
834 ret |= (SMB_VFS_SYS_ACL_GET_PERM(conn, permset, SMB_ACL_EXECUTE) ? S_IXUSR : 0);
839 /****************************************************************************
840 Map generic UNIX permissions to canon_ace permissions (a mode_t containing only S_(R|W|X)USR bits).
841 ****************************************************************************/
843 static mode_t unix_perms_to_acl_perms(mode_t mode, int r_mask, int w_mask, int x_mask)
857 /****************************************************************************
858 Map canon_ace permissions (a mode_t containing only S_(R|W|X)USR bits) to
859 an SMB_ACL_PERMSET_T.
860 ****************************************************************************/
862 static int map_acl_perms_to_permset(connection_struct *conn, mode_t mode, SMB_ACL_PERMSET_T *p_permset)
864 if (SMB_VFS_SYS_ACL_CLEAR_PERMS(conn, *p_permset) == -1)
866 if (mode & S_IRUSR) {
867 if (SMB_VFS_SYS_ACL_ADD_PERM(conn, *p_permset, SMB_ACL_READ) == -1)
870 if (mode & S_IWUSR) {
871 if (SMB_VFS_SYS_ACL_ADD_PERM(conn, *p_permset, SMB_ACL_WRITE) == -1)
874 if (mode & S_IXUSR) {
875 if (SMB_VFS_SYS_ACL_ADD_PERM(conn, *p_permset, SMB_ACL_EXECUTE) == -1)
881 /****************************************************************************
882 Function to create owner and group SIDs from a SMB_STRUCT_STAT.
883 ****************************************************************************/
885 void create_file_sids(const SMB_STRUCT_STAT *psbuf, DOM_SID *powner_sid, DOM_SID *pgroup_sid)
887 uid_to_sid( powner_sid, psbuf->st_ex_uid );
888 gid_to_sid( pgroup_sid, psbuf->st_ex_gid );
891 /****************************************************************************
892 Is the identity in two ACEs equal ? Check both SID and uid/gid.
893 ****************************************************************************/
895 static bool identity_in_ace_equal(canon_ace *ace1, canon_ace *ace2)
897 if (sid_equal(&ace1->trustee, &ace2->trustee)) {
900 if (ace1->owner_type == ace2->owner_type) {
901 if (ace1->owner_type == UID_ACE &&
902 ace1->unix_ug.uid == ace2->unix_ug.uid) {
904 } else if (ace1->owner_type == GID_ACE &&
905 ace1->unix_ug.gid == ace2->unix_ug.gid) {
912 /****************************************************************************
913 Merge aces with a common sid - if both are allow or deny, OR the permissions together and
914 delete the second one. If the first is deny, mask the permissions off and delete the allow
915 if the permissions become zero, delete the deny if the permissions are non zero.
916 ****************************************************************************/
918 static void merge_aces( canon_ace **pp_list_head )
920 canon_ace *l_head = *pp_list_head;
921 canon_ace *curr_ace_outer;
922 canon_ace *curr_ace_outer_next;
925 * First, merge allow entries with identical SIDs, and deny entries
926 * with identical SIDs.
929 for (curr_ace_outer = l_head; curr_ace_outer; curr_ace_outer = curr_ace_outer_next) {
931 canon_ace *curr_ace_next;
933 curr_ace_outer_next = curr_ace_outer->next; /* Save the link in case we delete. */
935 for (curr_ace = curr_ace_outer->next; curr_ace; curr_ace = curr_ace_next) {
937 curr_ace_next = curr_ace->next; /* Save the link in case of delete. */
939 if (identity_in_ace_equal(curr_ace, curr_ace_outer) &&
940 (curr_ace->attr == curr_ace_outer->attr)) {
942 if( DEBUGLVL( 10 )) {
943 dbgtext("merge_aces: Merging ACE's\n");
944 print_canon_ace( curr_ace_outer, 0);
945 print_canon_ace( curr_ace, 0);
948 /* Merge two allow or two deny ACE's. */
950 curr_ace_outer->perms |= curr_ace->perms;
951 DLIST_REMOVE(l_head, curr_ace);
953 curr_ace_outer_next = curr_ace_outer->next; /* We may have deleted the link. */
959 * Now go through and mask off allow permissions with deny permissions.
960 * We can delete either the allow or deny here as we know that each SID
961 * appears only once in the list.
964 for (curr_ace_outer = l_head; curr_ace_outer; curr_ace_outer = curr_ace_outer_next) {
966 canon_ace *curr_ace_next;
968 curr_ace_outer_next = curr_ace_outer->next; /* Save the link in case we delete. */
970 for (curr_ace = curr_ace_outer->next; curr_ace; curr_ace = curr_ace_next) {
972 curr_ace_next = curr_ace->next; /* Save the link in case of delete. */
975 * Subtract ACE's with different entries. Due to the ordering constraints
976 * we've put on the ACL, we know the deny must be the first one.
979 if (identity_in_ace_equal(curr_ace, curr_ace_outer) &&
980 (curr_ace_outer->attr == DENY_ACE) && (curr_ace->attr == ALLOW_ACE)) {
982 if( DEBUGLVL( 10 )) {
983 dbgtext("merge_aces: Masking ACE's\n");
984 print_canon_ace( curr_ace_outer, 0);
985 print_canon_ace( curr_ace, 0);
988 curr_ace->perms &= ~curr_ace_outer->perms;
990 if (curr_ace->perms == 0) {
993 * The deny overrides the allow. Remove the allow.
996 DLIST_REMOVE(l_head, curr_ace);
998 curr_ace_outer_next = curr_ace_outer->next; /* We may have deleted the link. */
1003 * Even after removing permissions, there
1004 * are still allow permissions - delete the deny.
1005 * It is safe to delete the deny here,
1006 * as we are guarenteed by the deny first
1007 * ordering that all the deny entries for
1008 * this SID have already been merged into one
1009 * before we can get to an allow ace.
1012 DLIST_REMOVE(l_head, curr_ace_outer);
1013 SAFE_FREE(curr_ace_outer);
1018 } /* end for curr_ace */
1019 } /* end for curr_ace_outer */
1021 /* We may have modified the list. */
1023 *pp_list_head = l_head;
1026 /****************************************************************************
1027 Check if we need to return NT4.x compatible ACL entries.
1028 ****************************************************************************/
1030 bool nt4_compatible_acls(void)
1032 int compat = lp_acl_compatibility();
1034 if (compat == ACL_COMPAT_AUTO) {
1035 enum remote_arch_types ra_type = get_remote_arch();
1037 /* Automatically adapt to client */
1038 return (ra_type <= RA_WINNT);
1040 return (compat == ACL_COMPAT_WINNT);
1044 /****************************************************************************
1045 Map canon_ace perms to permission bits NT.
1046 The attr element is not used here - we only process deny entries on set,
1047 not get. Deny entries are implicit on get with ace->perms = 0.
1048 ****************************************************************************/
1050 static uint32_t map_canon_ace_perms(int snum,
1051 enum security_ace_type *pacl_type,
1055 uint32_t nt_mask = 0;
1057 *pacl_type = SEC_ACE_TYPE_ACCESS_ALLOWED;
1059 if (lp_acl_map_full_control(snum) && ((perms & ALL_ACE_PERMS) == ALL_ACE_PERMS)) {
1060 if (directory_ace) {
1061 nt_mask = UNIX_DIRECTORY_ACCESS_RWX;
1063 nt_mask = (UNIX_ACCESS_RWX & ~DELETE_ACCESS);
1065 } else if ((perms & ALL_ACE_PERMS) == (mode_t)0) {
1067 * Windows NT refuses to display ACEs with no permissions in them (but
1068 * they are perfectly legal with Windows 2000). If the ACE has empty
1069 * permissions we cannot use 0, so we use the otherwise unused
1070 * WRITE_OWNER permission, which we ignore when we set an ACL.
1071 * We abstract this into a #define of UNIX_ACCESS_NONE to allow this
1072 * to be changed in the future.
1075 if (nt4_compatible_acls())
1076 nt_mask = UNIX_ACCESS_NONE;
1080 if (directory_ace) {
1081 nt_mask |= ((perms & S_IRUSR) ? UNIX_DIRECTORY_ACCESS_R : 0 );
1082 nt_mask |= ((perms & S_IWUSR) ? UNIX_DIRECTORY_ACCESS_W : 0 );
1083 nt_mask |= ((perms & S_IXUSR) ? UNIX_DIRECTORY_ACCESS_X : 0 );
1085 nt_mask |= ((perms & S_IRUSR) ? UNIX_ACCESS_R : 0 );
1086 nt_mask |= ((perms & S_IWUSR) ? UNIX_ACCESS_W : 0 );
1087 nt_mask |= ((perms & S_IXUSR) ? UNIX_ACCESS_X : 0 );
1091 DEBUG(10,("map_canon_ace_perms: Mapped (UNIX) %x to (NT) %x\n",
1092 (unsigned int)perms, (unsigned int)nt_mask ));
1097 /****************************************************************************
1098 Map NT perms to a UNIX mode_t.
1099 ****************************************************************************/
1101 #define FILE_SPECIFIC_READ_BITS (FILE_READ_DATA|FILE_READ_EA|FILE_READ_ATTRIBUTES)
1102 #define FILE_SPECIFIC_WRITE_BITS (FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_WRITE_EA|FILE_WRITE_ATTRIBUTES)
1103 #define FILE_SPECIFIC_EXECUTE_BITS (FILE_EXECUTE)
1105 static mode_t map_nt_perms( uint32 *mask, int type)
1111 if((*mask) & GENERIC_ALL_ACCESS)
1112 mode = S_IRUSR|S_IWUSR|S_IXUSR;
1114 mode |= ((*mask) & (GENERIC_READ_ACCESS|FILE_SPECIFIC_READ_BITS)) ? S_IRUSR : 0;
1115 mode |= ((*mask) & (GENERIC_WRITE_ACCESS|FILE_SPECIFIC_WRITE_BITS)) ? S_IWUSR : 0;
1116 mode |= ((*mask) & (GENERIC_EXECUTE_ACCESS|FILE_SPECIFIC_EXECUTE_BITS)) ? S_IXUSR : 0;
1120 if((*mask) & GENERIC_ALL_ACCESS)
1121 mode = S_IRGRP|S_IWGRP|S_IXGRP;
1123 mode |= ((*mask) & (GENERIC_READ_ACCESS|FILE_SPECIFIC_READ_BITS)) ? S_IRGRP : 0;
1124 mode |= ((*mask) & (GENERIC_WRITE_ACCESS|FILE_SPECIFIC_WRITE_BITS)) ? S_IWGRP : 0;
1125 mode |= ((*mask) & (GENERIC_EXECUTE_ACCESS|FILE_SPECIFIC_EXECUTE_BITS)) ? S_IXGRP : 0;
1129 if((*mask) & GENERIC_ALL_ACCESS)
1130 mode = S_IROTH|S_IWOTH|S_IXOTH;
1132 mode |= ((*mask) & (GENERIC_READ_ACCESS|FILE_SPECIFIC_READ_BITS)) ? S_IROTH : 0;
1133 mode |= ((*mask) & (GENERIC_WRITE_ACCESS|FILE_SPECIFIC_WRITE_BITS)) ? S_IWOTH : 0;
1134 mode |= ((*mask) & (GENERIC_EXECUTE_ACCESS|FILE_SPECIFIC_EXECUTE_BITS)) ? S_IXOTH : 0;
1142 /****************************************************************************
1143 Unpack a SEC_DESC into a UNIX owner and group.
1144 ****************************************************************************/
1146 NTSTATUS unpack_nt_owners(int snum, uid_t *puser, gid_t *pgrp, uint32 security_info_sent, const SEC_DESC *psd)
1154 if(security_info_sent == 0) {
1155 DEBUG(0,("unpack_nt_owners: no security info sent !\n"));
1156 return NT_STATUS_OK;
1160 * Validate the owner and group SID's.
1163 memset(&owner_sid, '\0', sizeof(owner_sid));
1164 memset(&grp_sid, '\0', sizeof(grp_sid));
1166 DEBUG(5,("unpack_nt_owners: validating owner_sids.\n"));
1169 * Don't immediately fail if the owner sid cannot be validated.
1170 * This may be a group chown only set.
1173 if (security_info_sent & OWNER_SECURITY_INFORMATION) {
1174 sid_copy(&owner_sid, psd->owner_sid);
1175 if (!sid_to_uid(&owner_sid, puser)) {
1176 if (lp_force_unknown_acl_user(snum)) {
1177 /* this allows take ownership to work
1179 *puser = current_user.ut.uid;
1181 DEBUG(3,("unpack_nt_owners: unable to validate"
1182 " owner sid for %s\n",
1183 sid_string_dbg(&owner_sid)));
1184 return NT_STATUS_INVALID_OWNER;
1187 DEBUG(3,("unpack_nt_owners: owner sid mapped to uid %u\n",
1188 (unsigned int)*puser ));
1192 * Don't immediately fail if the group sid cannot be validated.
1193 * This may be an owner chown only set.
1196 if (security_info_sent & GROUP_SECURITY_INFORMATION) {
1197 sid_copy(&grp_sid, psd->group_sid);
1198 if (!sid_to_gid( &grp_sid, pgrp)) {
1199 if (lp_force_unknown_acl_user(snum)) {
1200 /* this allows take group ownership to work
1202 *pgrp = current_user.ut.gid;
1204 DEBUG(3,("unpack_nt_owners: unable to validate"
1206 return NT_STATUS_INVALID_OWNER;
1209 DEBUG(3,("unpack_nt_owners: group sid mapped to gid %u\n",
1210 (unsigned int)*pgrp));
1213 DEBUG(5,("unpack_nt_owners: owner_sids validated.\n"));
1215 return NT_STATUS_OK;
1218 /****************************************************************************
1219 Ensure the enforced permissions for this share apply.
1220 ****************************************************************************/
1222 static void apply_default_perms(const struct share_params *params,
1223 const bool is_directory, canon_ace *pace,
1226 mode_t and_bits = (mode_t)0;
1227 mode_t or_bits = (mode_t)0;
1229 /* Get the initial bits to apply. */
1232 and_bits = lp_dir_security_mask(params->service);
1233 or_bits = lp_force_dir_security_mode(params->service);
1235 and_bits = lp_security_mask(params->service);
1236 or_bits = lp_force_security_mode(params->service);
1239 /* Now bounce them into the S_USR space. */
1242 /* Ensure owner has read access. */
1243 pace->perms |= S_IRUSR;
1245 pace->perms |= (S_IWUSR|S_IXUSR);
1246 and_bits = unix_perms_to_acl_perms(and_bits, S_IRUSR, S_IWUSR, S_IXUSR);
1247 or_bits = unix_perms_to_acl_perms(or_bits, S_IRUSR, S_IWUSR, S_IXUSR);
1250 and_bits = unix_perms_to_acl_perms(and_bits, S_IRGRP, S_IWGRP, S_IXGRP);
1251 or_bits = unix_perms_to_acl_perms(or_bits, S_IRGRP, S_IWGRP, S_IXGRP);
1254 and_bits = unix_perms_to_acl_perms(and_bits, S_IROTH, S_IWOTH, S_IXOTH);
1255 or_bits = unix_perms_to_acl_perms(or_bits, S_IROTH, S_IWOTH, S_IXOTH);
1259 pace->perms = ((pace->perms & and_bits)|or_bits);
1262 /****************************************************************************
1263 Check if a given uid/SID is in a group gid/SID. This is probably very
1264 expensive and will need optimisation. A *lot* of optimisation :-). JRA.
1265 ****************************************************************************/
1267 static bool uid_entry_in_group( canon_ace *uid_ace, canon_ace *group_ace )
1269 const char *u_name = NULL;
1271 /* "Everyone" always matches every uid. */
1273 if (sid_equal(&group_ace->trustee, &global_sid_World))
1277 * if it's the current user, we already have the unix token
1278 * and don't need to do the complex user_in_group_sid() call
1280 if (uid_ace->unix_ug.uid == current_user.ut.uid) {
1283 if (group_ace->unix_ug.gid == current_user.ut.gid) {
1287 for (i=0; i < current_user.ut.ngroups; i++) {
1288 if (group_ace->unix_ug.gid == current_user.ut.groups[i]) {
1294 /* u_name talloc'ed off tos. */
1295 u_name = uidtoname(uid_ace->unix_ug.uid);
1301 * user_in_group_sid() uses create_token_from_username()
1302 * which creates an artificial NT token given just a username,
1303 * so this is not reliable for users from foreign domains
1304 * exported by winbindd!
1306 return user_in_group_sid(u_name, &group_ace->trustee);
1309 /****************************************************************************
1310 A well formed POSIX file or default ACL has at least 3 entries, a
1311 SMB_ACL_USER_OBJ, SMB_ACL_GROUP_OBJ, SMB_ACL_OTHER_OBJ.
1312 In addition, the owner must always have at least read access.
1313 When using this call on get_acl, the pst struct is valid and contains
1314 the mode of the file. When using this call on set_acl, the pst struct has
1315 been modified to have a mode containing the default for this file or directory
1317 ****************************************************************************/
1319 static bool ensure_canon_entry_valid(canon_ace **pp_ace,
1320 const struct share_params *params,
1321 const bool is_directory,
1322 const DOM_SID *pfile_owner_sid,
1323 const DOM_SID *pfile_grp_sid,
1324 const SMB_STRUCT_STAT *pst,
1328 bool got_user = False;
1329 bool got_grp = False;
1330 bool got_other = False;
1331 canon_ace *pace_other = NULL;
1333 for (pace = *pp_ace; pace; pace = pace->next) {
1334 if (pace->type == SMB_ACL_USER_OBJ) {
1337 apply_default_perms(params, is_directory, pace, S_IRUSR);
1340 } else if (pace->type == SMB_ACL_GROUP_OBJ) {
1343 * Ensure create mask/force create mode is respected on set.
1347 apply_default_perms(params, is_directory, pace, S_IRGRP);
1350 } else if (pace->type == SMB_ACL_OTHER) {
1353 * Ensure create mask/force create mode is respected on set.
1357 apply_default_perms(params, is_directory, pace, S_IROTH);
1364 if ((pace = SMB_MALLOC_P(canon_ace)) == NULL) {
1365 DEBUG(0,("ensure_canon_entry_valid: malloc fail.\n"));
1370 pace->type = SMB_ACL_USER_OBJ;
1371 pace->owner_type = UID_ACE;
1372 pace->unix_ug.uid = pst->st_ex_uid;
1373 pace->trustee = *pfile_owner_sid;
1374 pace->attr = ALLOW_ACE;
1377 /* See if the owning user is in any of the other groups in
1378 the ACE. If so, OR in the permissions from that group. */
1380 bool group_matched = False;
1381 canon_ace *pace_iter;
1383 for (pace_iter = *pp_ace; pace_iter; pace_iter = pace_iter->next) {
1384 if (pace_iter->type == SMB_ACL_GROUP_OBJ || pace_iter->type == SMB_ACL_GROUP) {
1385 if (uid_entry_in_group(pace, pace_iter)) {
1386 pace->perms |= pace_iter->perms;
1387 group_matched = True;
1392 /* If we only got an "everyone" perm, just use that. */
1393 if (!group_matched) {
1395 pace->perms = pace_other->perms;
1400 apply_default_perms(params, is_directory, pace, S_IRUSR);
1402 pace->perms = unix_perms_to_acl_perms(pst->st_ex_mode, S_IRUSR, S_IWUSR, S_IXUSR);
1405 DLIST_ADD(*pp_ace, pace);
1409 if ((pace = SMB_MALLOC_P(canon_ace)) == NULL) {
1410 DEBUG(0,("ensure_canon_entry_valid: malloc fail.\n"));
1415 pace->type = SMB_ACL_GROUP_OBJ;
1416 pace->owner_type = GID_ACE;
1417 pace->unix_ug.uid = pst->st_ex_gid;
1418 pace->trustee = *pfile_grp_sid;
1419 pace->attr = ALLOW_ACE;
1421 /* If we only got an "everyone" perm, just use that. */
1423 pace->perms = pace_other->perms;
1426 apply_default_perms(params, is_directory, pace, S_IRGRP);
1428 pace->perms = unix_perms_to_acl_perms(pst->st_ex_mode, S_IRGRP, S_IWGRP, S_IXGRP);
1431 DLIST_ADD(*pp_ace, pace);
1435 if ((pace = SMB_MALLOC_P(canon_ace)) == NULL) {
1436 DEBUG(0,("ensure_canon_entry_valid: malloc fail.\n"));
1441 pace->type = SMB_ACL_OTHER;
1442 pace->owner_type = WORLD_ACE;
1443 pace->unix_ug.world = -1;
1444 pace->trustee = global_sid_World;
1445 pace->attr = ALLOW_ACE;
1448 apply_default_perms(params, is_directory, pace, S_IROTH);
1450 pace->perms = unix_perms_to_acl_perms(pst->st_ex_mode, S_IROTH, S_IWOTH, S_IXOTH);
1452 DLIST_ADD(*pp_ace, pace);
1458 /****************************************************************************
1459 Check if a POSIX ACL has the required SMB_ACL_USER_OBJ and SMB_ACL_GROUP_OBJ entries.
1460 If it does not have them, check if there are any entries where the trustee is the
1461 file owner or the owning group, and map these to SMB_ACL_USER_OBJ and SMB_ACL_GROUP_OBJ.
1462 ****************************************************************************/
1464 static void check_owning_objs(canon_ace *ace, DOM_SID *pfile_owner_sid, DOM_SID *pfile_grp_sid)
1466 bool got_user_obj, got_group_obj;
1467 canon_ace *current_ace;
1470 entries = count_canon_ace_list(ace);
1471 got_user_obj = False;
1472 got_group_obj = False;
1474 for (i=0, current_ace = ace; i < entries; i++, current_ace = current_ace->next) {
1475 if (current_ace->type == SMB_ACL_USER_OBJ)
1476 got_user_obj = True;
1477 else if (current_ace->type == SMB_ACL_GROUP_OBJ)
1478 got_group_obj = True;
1480 if (got_user_obj && got_group_obj) {
1481 DEBUG(10,("check_owning_objs: ACL had owning user/group entries.\n"));
1485 for (i=0, current_ace = ace; i < entries; i++, current_ace = current_ace->next) {
1486 if (!got_user_obj && current_ace->owner_type == UID_ACE &&
1487 sid_equal(¤t_ace->trustee, pfile_owner_sid)) {
1488 current_ace->type = SMB_ACL_USER_OBJ;
1489 got_user_obj = True;
1491 if (!got_group_obj && current_ace->owner_type == GID_ACE &&
1492 sid_equal(¤t_ace->trustee, pfile_grp_sid)) {
1493 current_ace->type = SMB_ACL_GROUP_OBJ;
1494 got_group_obj = True;
1498 DEBUG(10,("check_owning_objs: ACL is missing an owner entry.\n"));
1500 DEBUG(10,("check_owning_objs: ACL is missing an owning group entry.\n"));
1503 /****************************************************************************
1504 Unpack a SEC_DESC into two canonical ace lists.
1505 ****************************************************************************/
1507 static bool create_canon_ace_lists(files_struct *fsp,
1508 SMB_STRUCT_STAT *pst,
1509 DOM_SID *pfile_owner_sid,
1510 DOM_SID *pfile_grp_sid,
1511 canon_ace **ppfile_ace,
1512 canon_ace **ppdir_ace,
1513 const SEC_ACL *dacl)
1515 bool all_aces_are_inherit_only = (fsp->is_directory ? True : False);
1516 canon_ace *file_ace = NULL;
1517 canon_ace *dir_ace = NULL;
1518 canon_ace *current_ace = NULL;
1519 bool got_dir_allow = False;
1520 bool got_file_allow = False;
1527 * Convert the incoming ACL into a more regular form.
1530 for(i = 0; i < dacl->num_aces; i++) {
1531 SEC_ACE *psa = &dacl->aces[i];
1533 if((psa->type != SEC_ACE_TYPE_ACCESS_ALLOWED) && (psa->type != SEC_ACE_TYPE_ACCESS_DENIED)) {
1534 DEBUG(3,("create_canon_ace_lists: unable to set anything but an ALLOW or DENY ACE.\n"));
1538 if (nt4_compatible_acls()) {
1540 * The security mask may be UNIX_ACCESS_NONE which should map into
1541 * no permissions (we overload the WRITE_OWNER bit for this) or it
1542 * should be one of the ALL/EXECUTE/READ/WRITE bits. Arrange for this
1543 * to be so. Any other bits override the UNIX_ACCESS_NONE bit.
1547 * Convert GENERIC bits to specific bits.
1550 se_map_generic(&psa->access_mask, &file_generic_mapping);
1552 psa->access_mask &= (UNIX_ACCESS_NONE|FILE_ALL_ACCESS);
1554 if(psa->access_mask != UNIX_ACCESS_NONE)
1555 psa->access_mask &= ~UNIX_ACCESS_NONE;
1560 * Deal with the fact that NT 4.x re-writes the canonical format
1561 * that we return for default ACLs. If a directory ACE is identical
1562 * to a inherited directory ACE then NT changes the bits so that the
1563 * first ACE is set to OI|IO and the second ACE for this SID is set
1564 * to CI. We need to repair this. JRA.
1567 for(i = 0; i < dacl->num_aces; i++) {
1568 SEC_ACE *psa1 = &dacl->aces[i];
1570 for (j = i + 1; j < dacl->num_aces; j++) {
1571 SEC_ACE *psa2 = &dacl->aces[j];
1573 if (psa1->access_mask != psa2->access_mask)
1576 if (!sid_equal(&psa1->trustee, &psa2->trustee))
1580 * Ok - permission bits and SIDs are equal.
1581 * Check if flags were re-written.
1584 if (psa1->flags & SEC_ACE_FLAG_INHERIT_ONLY) {
1586 psa1->flags |= (psa2->flags & (SEC_ACE_FLAG_CONTAINER_INHERIT|SEC_ACE_FLAG_OBJECT_INHERIT));
1587 psa2->flags &= ~(SEC_ACE_FLAG_CONTAINER_INHERIT|SEC_ACE_FLAG_OBJECT_INHERIT);
1589 } else if (psa2->flags & SEC_ACE_FLAG_INHERIT_ONLY) {
1591 psa2->flags |= (psa1->flags & (SEC_ACE_FLAG_CONTAINER_INHERIT|SEC_ACE_FLAG_OBJECT_INHERIT));
1592 psa1->flags &= ~(SEC_ACE_FLAG_CONTAINER_INHERIT|SEC_ACE_FLAG_OBJECT_INHERIT);
1598 for(i = 0; i < dacl->num_aces; i++) {
1599 SEC_ACE *psa = &dacl->aces[i];
1602 * Create a cannon_ace entry representing this NT DACL ACE.
1605 if ((current_ace = SMB_MALLOC_P(canon_ace)) == NULL) {
1606 free_canon_ace_list(file_ace);
1607 free_canon_ace_list(dir_ace);
1608 DEBUG(0,("create_canon_ace_lists: malloc fail.\n"));
1612 ZERO_STRUCTP(current_ace);
1614 sid_copy(¤t_ace->trustee, &psa->trustee);
1617 * Try and work out if the SID is a user or group
1618 * as we need to flag these differently for POSIX.
1619 * Note what kind of a POSIX ACL this should map to.
1622 if( sid_equal(¤t_ace->trustee, &global_sid_World)) {
1623 current_ace->owner_type = WORLD_ACE;
1624 current_ace->unix_ug.world = -1;
1625 current_ace->type = SMB_ACL_OTHER;
1626 } else if (sid_equal(¤t_ace->trustee, &global_sid_Creator_Owner)) {
1627 current_ace->owner_type = UID_ACE;
1628 current_ace->unix_ug.uid = pst->st_ex_uid;
1629 current_ace->type = SMB_ACL_USER_OBJ;
1632 * The Creator Owner entry only specifies inheritable permissions,
1633 * never access permissions. WinNT doesn't always set the ACE to
1634 *INHERIT_ONLY, though.
1637 if (nt4_compatible_acls())
1638 psa->flags |= SEC_ACE_FLAG_INHERIT_ONLY;
1639 } else if (sid_equal(¤t_ace->trustee, &global_sid_Creator_Group)) {
1640 current_ace->owner_type = GID_ACE;
1641 current_ace->unix_ug.gid = pst->st_ex_gid;
1642 current_ace->type = SMB_ACL_GROUP_OBJ;
1645 * The Creator Group entry only specifies inheritable permissions,
1646 * never access permissions. WinNT doesn't always set the ACE to
1647 *INHERIT_ONLY, though.
1649 if (nt4_compatible_acls())
1650 psa->flags |= SEC_ACE_FLAG_INHERIT_ONLY;
1652 } else if (sid_to_uid( ¤t_ace->trustee, ¤t_ace->unix_ug.uid)) {
1653 current_ace->owner_type = UID_ACE;
1654 /* If it's the owning user, this is a user_obj, not
1656 if (current_ace->unix_ug.uid == pst->st_ex_uid) {
1657 current_ace->type = SMB_ACL_USER_OBJ;
1659 current_ace->type = SMB_ACL_USER;
1661 } else if (sid_to_gid( ¤t_ace->trustee, ¤t_ace->unix_ug.gid)) {
1662 current_ace->owner_type = GID_ACE;
1663 /* If it's the primary group, this is a group_obj, not
1665 if (current_ace->unix_ug.gid == pst->st_ex_gid) {
1666 current_ace->type = SMB_ACL_GROUP_OBJ;
1668 current_ace->type = SMB_ACL_GROUP;
1672 * Silently ignore map failures in non-mappable SIDs (NT Authority, BUILTIN etc).
1675 if (non_mappable_sid(&psa->trustee)) {
1676 DEBUG(10, ("create_canon_ace_lists: ignoring "
1677 "non-mappable SID %s\n",
1678 sid_string_dbg(&psa->trustee)));
1679 SAFE_FREE(current_ace);
1683 free_canon_ace_list(file_ace);
1684 free_canon_ace_list(dir_ace);
1685 DEBUG(0, ("create_canon_ace_lists: unable to map SID "
1686 "%s to uid or gid.\n",
1687 sid_string_dbg(¤t_ace->trustee)));
1688 SAFE_FREE(current_ace);
1693 * Map the given NT permissions into a UNIX mode_t containing only
1694 * S_I(R|W|X)USR bits.
1697 current_ace->perms |= map_nt_perms( &psa->access_mask, S_IRUSR);
1698 current_ace->attr = (psa->type == SEC_ACE_TYPE_ACCESS_ALLOWED) ? ALLOW_ACE : DENY_ACE;
1700 /* Store the ace_flag. */
1701 current_ace->ace_flags = psa->flags;
1704 * Now add the created ace to either the file list, the directory
1705 * list, or both. We *MUST* preserve the order here (hence we use
1706 * DLIST_ADD_END) as NT ACLs are order dependent.
1709 if (fsp->is_directory) {
1712 * We can only add to the default POSIX ACE list if the ACE is
1713 * designed to be inherited by both files and directories.
1716 if ((psa->flags & (SEC_ACE_FLAG_OBJECT_INHERIT|SEC_ACE_FLAG_CONTAINER_INHERIT)) ==
1717 (SEC_ACE_FLAG_OBJECT_INHERIT|SEC_ACE_FLAG_CONTAINER_INHERIT)) {
1719 DLIST_ADD_END(dir_ace, current_ace, canon_ace *);
1722 * Note if this was an allow ace. We can't process
1723 * any further deny ace's after this.
1726 if (current_ace->attr == ALLOW_ACE)
1727 got_dir_allow = True;
1729 if ((current_ace->attr == DENY_ACE) && got_dir_allow) {
1730 DEBUG(0,("create_canon_ace_lists: malformed ACL in inheritable ACL ! \
1731 Deny entry after Allow entry. Failing to set on file %s.\n", fsp->fsp_name ));
1732 free_canon_ace_list(file_ace);
1733 free_canon_ace_list(dir_ace);
1737 if( DEBUGLVL( 10 )) {
1738 dbgtext("create_canon_ace_lists: adding dir ACL:\n");
1739 print_canon_ace( current_ace, 0);
1743 * If this is not an inherit only ACE we need to add a duplicate
1747 if (!(psa->flags & SEC_ACE_FLAG_INHERIT_ONLY)) {
1748 canon_ace *dup_ace = dup_canon_ace(current_ace);
1751 DEBUG(0,("create_canon_ace_lists: malloc fail !\n"));
1752 free_canon_ace_list(file_ace);
1753 free_canon_ace_list(dir_ace);
1758 * We must not free current_ace here as its
1759 * pointer is now owned by the dir_ace list.
1761 current_ace = dup_ace;
1764 * We must not free current_ace here as its
1765 * pointer is now owned by the dir_ace list.
1773 * Only add to the file ACL if not inherit only.
1776 if (current_ace && !(psa->flags & SEC_ACE_FLAG_INHERIT_ONLY)) {
1777 DLIST_ADD_END(file_ace, current_ace, canon_ace *);
1780 * Note if this was an allow ace. We can't process
1781 * any further deny ace's after this.
1784 if (current_ace->attr == ALLOW_ACE)
1785 got_file_allow = True;
1787 if ((current_ace->attr == DENY_ACE) && got_file_allow) {
1788 DEBUG(0,("create_canon_ace_lists: malformed ACL in file ACL ! \
1789 Deny entry after Allow entry. Failing to set on file %s.\n", fsp->fsp_name ));
1790 free_canon_ace_list(file_ace);
1791 free_canon_ace_list(dir_ace);
1795 if( DEBUGLVL( 10 )) {
1796 dbgtext("create_canon_ace_lists: adding file ACL:\n");
1797 print_canon_ace( current_ace, 0);
1799 all_aces_are_inherit_only = False;
1801 * We must not free current_ace here as its
1802 * pointer is now owned by the file_ace list.
1808 * Free if ACE was not added.
1811 SAFE_FREE(current_ace);
1814 if (fsp->is_directory && all_aces_are_inherit_only) {
1816 * Windows 2000 is doing one of these weird 'inherit acl'
1817 * traverses to conserve NTFS ACL resources. Just pretend
1818 * there was no DACL sent. JRA.
1821 DEBUG(10,("create_canon_ace_lists: Win2k inherit acl traverse. Ignoring DACL.\n"));
1822 free_canon_ace_list(file_ace);
1823 free_canon_ace_list(dir_ace);
1828 * Check if we have SMB_ACL_USER_OBJ and SMB_ACL_GROUP_OBJ entries in each
1829 * ACL. If we don't have them, check if any SMB_ACL_USER/SMB_ACL_GROUP
1830 * entries can be converted to *_OBJ. Usually we will already have these
1831 * entries in the Default ACL, and the Access ACL will not have them.
1834 check_owning_objs(file_ace, pfile_owner_sid, pfile_grp_sid);
1837 check_owning_objs(dir_ace, pfile_owner_sid, pfile_grp_sid);
1841 *ppfile_ace = file_ace;
1842 *ppdir_ace = dir_ace;
1847 /****************************************************************************
1848 ASCII art time again... JRA :-).
1850 We have 4 cases to process when moving from an NT ACL to a POSIX ACL. Firstly,
1851 we insist the ACL is in canonical form (ie. all DENY entries preceede ALLOW
1852 entries). Secondly, the merge code has ensured that all duplicate SID entries for
1853 allow or deny have been merged, so the same SID can only appear once in the deny
1854 list or once in the allow list.
1856 We then process as follows :
1858 ---------------------------------------------------------------------------
1859 First pass - look for a Everyone DENY entry.
1861 If it is deny all (rwx) trunate the list at this point.
1862 Else, walk the list from this point and use the deny permissions of this
1863 entry as a mask on all following allow entries. Finally, delete
1864 the Everyone DENY entry (we have applied it to everything possible).
1866 In addition, in this pass we remove any DENY entries that have
1867 no permissions (ie. they are a DENY nothing).
1868 ---------------------------------------------------------------------------
1869 Second pass - only deal with deny user entries.
1871 DENY user1 (perms XXX)
1874 for all following allow group entries where user1 is in group
1875 new_perms |= group_perms;
1877 user1 entry perms = new_perms & ~ XXX;
1879 Convert the deny entry to an allow entry with the new perms and
1880 push to the end of the list. Note if the user was in no groups
1881 this maps to a specific allow nothing entry for this user.
1883 The common case from the NT ACL choser (userX deny all) is
1884 optimised so we don't do the group lookup - we just map to
1885 an allow nothing entry.
1887 What we're doing here is inferring the allow permissions the
1888 person setting the ACE on user1 wanted by looking at the allow
1889 permissions on the groups the user is currently in. This will
1890 be a snapshot, depending on group membership but is the best
1891 we can do and has the advantage of failing closed rather than
1893 ---------------------------------------------------------------------------
1894 Third pass - only deal with deny group entries.
1896 DENY group1 (perms XXX)
1898 for all following allow user entries where user is in group1
1899 user entry perms = user entry perms & ~ XXX;
1901 If there is a group Everyone allow entry with permissions YYY,
1902 convert the group1 entry to an allow entry and modify its
1905 new_perms = YYY & ~ XXX
1907 and push to the end of the list.
1909 If there is no group Everyone allow entry then convert the
1910 group1 entry to a allow nothing entry and push to the end of the list.
1912 Note that the common case from the NT ACL choser (groupX deny all)
1913 cannot be optimised here as we need to modify user entries who are
1914 in the group to change them to a deny all also.
1916 What we're doing here is modifying the allow permissions of
1917 user entries (which are more specific in POSIX ACLs) to mask
1918 out the explicit deny set on the group they are in. This will
1919 be a snapshot depending on current group membership but is the
1920 best we can do and has the advantage of failing closed rather
1922 ---------------------------------------------------------------------------
1923 Fourth pass - cope with cumulative permissions.
1925 for all allow user entries, if there exists an allow group entry with
1926 more permissive permissions, and the user is in that group, rewrite the
1927 allow user permissions to contain both sets of permissions.
1929 Currently the code for this is #ifdef'ed out as these semantics make
1930 no sense to me. JRA.
1931 ---------------------------------------------------------------------------
1933 Note we *MUST* do the deny user pass first as this will convert deny user
1934 entries into allow user entries which can then be processed by the deny
1937 The above algorithm took a *lot* of thinking about - hence this
1938 explaination :-). JRA.
1939 ****************************************************************************/
1941 /****************************************************************************
1942 Process a canon_ace list entries. This is very complex code. We need
1943 to go through and remove the "deny" permissions from any allow entry that matches
1944 the id of this entry. We have already refused any NT ACL that wasn't in correct
1945 order (DENY followed by ALLOW). If any allow entry ends up with zero permissions,
1946 we just remove it (to fail safe). We have already removed any duplicate ace
1947 entries. Treat an "Everyone" DENY_ACE as a special case - use it to mask all
1949 ****************************************************************************/
1951 static void process_deny_list( canon_ace **pp_ace_list )
1953 canon_ace *ace_list = *pp_ace_list;
1954 canon_ace *curr_ace = NULL;
1955 canon_ace *curr_ace_next = NULL;
1957 /* Pass 1 above - look for an Everyone, deny entry. */
1959 for (curr_ace = ace_list; curr_ace; curr_ace = curr_ace_next) {
1960 canon_ace *allow_ace_p;
1962 curr_ace_next = curr_ace->next; /* So we can't lose the link. */
1964 if (curr_ace->attr != DENY_ACE)
1967 if (curr_ace->perms == (mode_t)0) {
1969 /* Deny nothing entry - delete. */
1971 DLIST_REMOVE(ace_list, curr_ace);
1975 if (!sid_equal(&curr_ace->trustee, &global_sid_World))
1978 /* JRATEST - assert. */
1979 SMB_ASSERT(curr_ace->owner_type == WORLD_ACE);
1981 if (curr_ace->perms == ALL_ACE_PERMS) {
1984 * Optimisation. This is a DENY_ALL to Everyone. Truncate the
1985 * list at this point including this entry.
1988 canon_ace *prev_entry = curr_ace->prev;
1990 free_canon_ace_list( curr_ace );
1992 prev_entry->next = NULL;
1994 /* We deleted the entire list. */
2000 for (allow_ace_p = curr_ace->next; allow_ace_p; allow_ace_p = allow_ace_p->next) {
2003 * Only mask off allow entries.
2006 if (allow_ace_p->attr != ALLOW_ACE)
2009 allow_ace_p->perms &= ~curr_ace->perms;
2013 * Now it's been applied, remove it.
2016 DLIST_REMOVE(ace_list, curr_ace);
2019 /* Pass 2 above - deal with deny user entries. */
2021 for (curr_ace = ace_list; curr_ace; curr_ace = curr_ace_next) {
2022 mode_t new_perms = (mode_t)0;
2023 canon_ace *allow_ace_p;
2025 curr_ace_next = curr_ace->next; /* So we can't lose the link. */
2027 if (curr_ace->attr != DENY_ACE)
2030 if (curr_ace->owner_type != UID_ACE)
2033 if (curr_ace->perms == ALL_ACE_PERMS) {
2036 * Optimisation - this is a deny everything to this user.
2037 * Convert to an allow nothing and push to the end of the list.
2040 curr_ace->attr = ALLOW_ACE;
2041 curr_ace->perms = (mode_t)0;
2042 DLIST_DEMOTE(ace_list, curr_ace, canon_ace *);
2046 for (allow_ace_p = curr_ace->next; allow_ace_p; allow_ace_p = allow_ace_p->next) {
2048 if (allow_ace_p->attr != ALLOW_ACE)
2051 /* We process GID_ACE and WORLD_ACE entries only. */
2053 if (allow_ace_p->owner_type == UID_ACE)
2056 if (uid_entry_in_group( curr_ace, allow_ace_p))
2057 new_perms |= allow_ace_p->perms;
2061 * Convert to a allow entry, modify the perms and push to the end
2065 curr_ace->attr = ALLOW_ACE;
2066 curr_ace->perms = (new_perms & ~curr_ace->perms);
2067 DLIST_DEMOTE(ace_list, curr_ace, canon_ace *);
2070 /* Pass 3 above - deal with deny group entries. */
2072 for (curr_ace = ace_list; curr_ace; curr_ace = curr_ace_next) {
2073 canon_ace *allow_ace_p;
2074 canon_ace *allow_everyone_p = NULL;
2076 curr_ace_next = curr_ace->next; /* So we can't lose the link. */
2078 if (curr_ace->attr != DENY_ACE)
2081 if (curr_ace->owner_type != GID_ACE)
2084 for (allow_ace_p = curr_ace->next; allow_ace_p; allow_ace_p = allow_ace_p->next) {
2086 if (allow_ace_p->attr != ALLOW_ACE)
2089 /* Store a pointer to the Everyone allow, if it exists. */
2090 if (allow_ace_p->owner_type == WORLD_ACE)
2091 allow_everyone_p = allow_ace_p;
2093 /* We process UID_ACE entries only. */
2095 if (allow_ace_p->owner_type != UID_ACE)
2098 /* Mask off the deny group perms. */
2100 if (uid_entry_in_group( allow_ace_p, curr_ace))
2101 allow_ace_p->perms &= ~curr_ace->perms;
2105 * Convert the deny to an allow with the correct perms and
2106 * push to the end of the list.
2109 curr_ace->attr = ALLOW_ACE;
2110 if (allow_everyone_p)
2111 curr_ace->perms = allow_everyone_p->perms & ~curr_ace->perms;
2113 curr_ace->perms = (mode_t)0;
2114 DLIST_DEMOTE(ace_list, curr_ace, canon_ace *);
2117 /* Doing this fourth pass allows Windows semantics to be layered
2118 * on top of POSIX semantics. I'm not sure if this is desirable.
2119 * For example, in W2K ACLs there is no way to say, "Group X no
2120 * access, user Y full access" if user Y is a member of group X.
2121 * This seems completely broken semantics to me.... JRA.
2125 /* Pass 4 above - deal with allow entries. */
2127 for (curr_ace = ace_list; curr_ace; curr_ace = curr_ace_next) {
2128 canon_ace *allow_ace_p;
2130 curr_ace_next = curr_ace->next; /* So we can't lose the link. */
2132 if (curr_ace->attr != ALLOW_ACE)
2135 if (curr_ace->owner_type != UID_ACE)
2138 for (allow_ace_p = ace_list; allow_ace_p; allow_ace_p = allow_ace_p->next) {
2140 if (allow_ace_p->attr != ALLOW_ACE)
2143 /* We process GID_ACE entries only. */
2145 if (allow_ace_p->owner_type != GID_ACE)
2148 /* OR in the group perms. */
2150 if (uid_entry_in_group( curr_ace, allow_ace_p))
2151 curr_ace->perms |= allow_ace_p->perms;
2156 *pp_ace_list = ace_list;
2159 /****************************************************************************
2160 Create a default mode that will be used if a security descriptor entry has
2161 no user/group/world entries.
2162 ****************************************************************************/
2164 static mode_t create_default_mode(files_struct *fsp, bool interitable_mode)
2166 int snum = SNUM(fsp->conn);
2167 mode_t and_bits = (mode_t)0;
2168 mode_t or_bits = (mode_t)0;
2169 mode_t mode = interitable_mode
2170 ? unix_mode( fsp->conn, FILE_ATTRIBUTE_ARCHIVE, fsp->fsp_name,
2174 if (fsp->is_directory)
2175 mode |= (S_IWUSR|S_IXUSR);
2178 * Now AND with the create mode/directory mode bits then OR with the
2179 * force create mode/force directory mode bits.
2182 if (fsp->is_directory) {
2183 and_bits = lp_dir_security_mask(snum);
2184 or_bits = lp_force_dir_security_mode(snum);
2186 and_bits = lp_security_mask(snum);
2187 or_bits = lp_force_security_mode(snum);
2190 return ((mode & and_bits)|or_bits);
2193 /****************************************************************************
2194 Unpack a SEC_DESC into two canonical ace lists. We don't depend on this
2196 ****************************************************************************/
2198 static bool unpack_canon_ace(files_struct *fsp,
2199 SMB_STRUCT_STAT *pst,
2200 DOM_SID *pfile_owner_sid,
2201 DOM_SID *pfile_grp_sid,
2202 canon_ace **ppfile_ace,
2203 canon_ace **ppdir_ace,
2204 uint32 security_info_sent,
2205 const SEC_DESC *psd)
2207 canon_ace *file_ace = NULL;
2208 canon_ace *dir_ace = NULL;
2213 if(security_info_sent == 0) {
2214 DEBUG(0,("unpack_canon_ace: no security info sent !\n"));
2219 * If no DACL then this is a chown only security descriptor.
2222 if(!(security_info_sent & DACL_SECURITY_INFORMATION) || !psd->dacl)
2226 * Now go through the DACL and create the canon_ace lists.
2229 if (!create_canon_ace_lists( fsp, pst, pfile_owner_sid, pfile_grp_sid,
2230 &file_ace, &dir_ace, psd->dacl))
2233 if ((file_ace == NULL) && (dir_ace == NULL)) {
2234 /* W2K traverse DACL set - ignore. */
2239 * Go through the canon_ace list and merge entries
2240 * belonging to identical users of identical allow or deny type.
2241 * We can do this as all deny entries come first, followed by
2242 * all allow entries (we have mandated this before accepting this acl).
2245 print_canon_ace_list( "file ace - before merge", file_ace);
2246 merge_aces( &file_ace );
2248 print_canon_ace_list( "dir ace - before merge", dir_ace);
2249 merge_aces( &dir_ace );
2252 * NT ACLs are order dependent. Go through the acl lists and
2253 * process DENY entries by masking the allow entries.
2256 print_canon_ace_list( "file ace - before deny", file_ace);
2257 process_deny_list( &file_ace);
2259 print_canon_ace_list( "dir ace - before deny", dir_ace);
2260 process_deny_list( &dir_ace);
2263 * A well formed POSIX file or default ACL has at least 3 entries, a
2264 * SMB_ACL_USER_OBJ, SMB_ACL_GROUP_OBJ, SMB_ACL_OTHER_OBJ
2265 * and optionally a mask entry. Ensure this is the case.
2268 print_canon_ace_list( "file ace - before valid", file_ace);
2271 * A default 3 element mode entry for a file should be r-- --- ---.
2272 * A default 3 element mode entry for a directory should be rwx --- ---.
2275 pst->st_ex_mode = create_default_mode(fsp, False);
2277 if (!ensure_canon_entry_valid(&file_ace, fsp->conn->params, fsp->is_directory, pfile_owner_sid, pfile_grp_sid, pst, True)) {
2278 free_canon_ace_list(file_ace);
2279 free_canon_ace_list(dir_ace);
2283 print_canon_ace_list( "dir ace - before valid", dir_ace);
2286 * A default inheritable 3 element mode entry for a directory should be the
2287 * mode Samba will use to create a file within. Ensure user rwx bits are set if
2291 pst->st_ex_mode = create_default_mode(fsp, True);
2293 if (dir_ace && !ensure_canon_entry_valid(&dir_ace, fsp->conn->params, fsp->is_directory, pfile_owner_sid, pfile_grp_sid, pst, True)) {
2294 free_canon_ace_list(file_ace);
2295 free_canon_ace_list(dir_ace);
2299 print_canon_ace_list( "file ace - return", file_ace);
2300 print_canon_ace_list( "dir ace - return", dir_ace);
2302 *ppfile_ace = file_ace;
2303 *ppdir_ace = dir_ace;
2308 /******************************************************************************
2309 When returning permissions, try and fit NT display
2310 semantics if possible. Note the the canon_entries here must have been malloced.
2311 The list format should be - first entry = owner, followed by group and other user
2312 entries, last entry = other.
2314 Note that this doesn't exactly match the NT semantics for an ACL. As POSIX entries
2315 are not ordered, and match on the most specific entry rather than walking a list,
2316 then a simple POSIX permission of rw-r--r-- should really map to 5 entries,
2318 Entry 0: owner : deny all except read and write.
2319 Entry 1: owner : allow read and write.
2320 Entry 2: group : deny all except read.
2321 Entry 3: group : allow read.
2322 Entry 4: Everyone : allow read.
2324 But NT cannot display this in their ACL editor !
2325 ********************************************************************************/
2327 static void arrange_posix_perms(const char *filename, canon_ace **pp_list_head)
2329 canon_ace *l_head = *pp_list_head;
2330 canon_ace *owner_ace = NULL;
2331 canon_ace *other_ace = NULL;
2332 canon_ace *ace = NULL;
2334 for (ace = l_head; ace; ace = ace->next) {
2335 if (ace->type == SMB_ACL_USER_OBJ)
2337 else if (ace->type == SMB_ACL_OTHER) {
2338 /* Last ace - this is "other" */
2343 if (!owner_ace || !other_ace) {
2344 DEBUG(0,("arrange_posix_perms: Invalid POSIX permissions for file %s, missing owner or other.\n",
2350 * The POSIX algorithm applies to owner first, and other last,
2351 * so ensure they are arranged in this order.
2355 DLIST_PROMOTE(l_head, owner_ace);
2359 DLIST_DEMOTE(l_head, other_ace, canon_ace *);
2362 /* We have probably changed the head of the list. */
2364 *pp_list_head = l_head;
2367 /****************************************************************************
2368 Create a linked list of canonical ACE entries.
2369 ****************************************************************************/
2371 static canon_ace *canonicalise_acl(struct connection_struct *conn,
2372 const char *fname, SMB_ACL_T posix_acl,
2373 const SMB_STRUCT_STAT *psbuf,
2374 const DOM_SID *powner, const DOM_SID *pgroup, struct pai_val *pal, SMB_ACL_TYPE_T the_acl_type)
2376 mode_t acl_mask = (S_IRUSR|S_IWUSR|S_IXUSR);
2377 canon_ace *l_head = NULL;
2378 canon_ace *ace = NULL;
2379 canon_ace *next_ace = NULL;
2380 int entry_id = SMB_ACL_FIRST_ENTRY;
2381 SMB_ACL_ENTRY_T entry;
2384 while ( posix_acl && (SMB_VFS_SYS_ACL_GET_ENTRY(conn, posix_acl, entry_id, &entry) == 1)) {
2385 SMB_ACL_TAG_T tagtype;
2386 SMB_ACL_PERMSET_T permset;
2389 enum ace_owner owner_type;
2391 entry_id = SMB_ACL_NEXT_ENTRY;
2393 /* Is this a MASK entry ? */
2394 if (SMB_VFS_SYS_ACL_GET_TAG_TYPE(conn, entry, &tagtype) == -1)
2397 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, entry, &permset) == -1)
2400 /* Decide which SID to use based on the ACL type. */
2402 case SMB_ACL_USER_OBJ:
2403 /* Get the SID from the owner. */
2404 sid_copy(&sid, powner);
2405 unix_ug.uid = psbuf->st_ex_uid;
2406 owner_type = UID_ACE;
2410 uid_t *puid = (uid_t *)SMB_VFS_SYS_ACL_GET_QUALIFIER(conn, entry);
2412 DEBUG(0,("canonicalise_acl: Failed to get uid.\n"));
2416 * A SMB_ACL_USER entry for the owner is shadowed by the
2417 * SMB_ACL_USER_OBJ entry and Windows also cannot represent
2418 * that entry, so we ignore it. We also don't create such
2419 * entries out of the blue when setting ACLs, so a get/set
2420 * cycle will drop them.
2422 if (the_acl_type == SMB_ACL_TYPE_ACCESS && *puid == psbuf->st_ex_uid) {
2423 SMB_VFS_SYS_ACL_FREE_QUALIFIER(conn, (void *)puid,tagtype);
2426 uid_to_sid( &sid, *puid);
2427 unix_ug.uid = *puid;
2428 owner_type = UID_ACE;
2429 SMB_VFS_SYS_ACL_FREE_QUALIFIER(conn, (void *)puid,tagtype);
2432 case SMB_ACL_GROUP_OBJ:
2433 /* Get the SID from the owning group. */
2434 sid_copy(&sid, pgroup);
2435 unix_ug.gid = psbuf->st_ex_gid;
2436 owner_type = GID_ACE;
2440 gid_t *pgid = (gid_t *)SMB_VFS_SYS_ACL_GET_QUALIFIER(conn, entry);
2442 DEBUG(0,("canonicalise_acl: Failed to get gid.\n"));
2445 gid_to_sid( &sid, *pgid);
2446 unix_ug.gid = *pgid;
2447 owner_type = GID_ACE;
2448 SMB_VFS_SYS_ACL_FREE_QUALIFIER(conn, (void *)pgid,tagtype);
2452 acl_mask = convert_permset_to_mode_t(conn, permset);
2453 continue; /* Don't count the mask as an entry. */
2455 /* Use the Everyone SID */
2456 sid = global_sid_World;
2458 owner_type = WORLD_ACE;
2461 DEBUG(0,("canonicalise_acl: Unknown tagtype %u\n", (unsigned int)tagtype));
2466 * Add this entry to the list.
2469 if ((ace = SMB_MALLOC_P(canon_ace)) == NULL)
2473 ace->type = tagtype;
2474 ace->perms = convert_permset_to_mode_t(conn, permset);
2475 ace->attr = ALLOW_ACE;
2477 ace->unix_ug = unix_ug;
2478 ace->owner_type = owner_type;
2479 ace->ace_flags = get_pai_flags(pal, ace, (the_acl_type == SMB_ACL_TYPE_DEFAULT));
2481 DLIST_ADD(l_head, ace);
2485 * This next call will ensure we have at least a user/group/world set.
2488 if (!ensure_canon_entry_valid(&l_head, conn->params,
2489 S_ISDIR(psbuf->st_ex_mode), powner, pgroup,
2494 * Now go through the list, masking the permissions with the
2495 * acl_mask. Ensure all DENY Entries are at the start of the list.
2498 DEBUG(10,("canonicalise_acl: %s ace entries before arrange :\n", the_acl_type == SMB_ACL_TYPE_ACCESS ? "Access" : "Default" ));
2500 for ( ace_count = 0, ace = l_head; ace; ace = next_ace, ace_count++) {
2501 next_ace = ace->next;
2503 /* Masks are only applied to entries other than USER_OBJ and OTHER. */
2504 if (ace->type != SMB_ACL_OTHER && ace->type != SMB_ACL_USER_OBJ)
2505 ace->perms &= acl_mask;
2507 if (ace->perms == 0) {
2508 DLIST_PROMOTE(l_head, ace);
2511 if( DEBUGLVL( 10 ) ) {
2512 print_canon_ace(ace, ace_count);
2516 arrange_posix_perms(fname,&l_head );
2518 print_canon_ace_list( "canonicalise_acl: ace entries after arrange", l_head );
2524 free_canon_ace_list(l_head);
2528 /****************************************************************************
2529 Check if the current user group list contains a given group.
2530 ****************************************************************************/
2532 static bool current_user_in_group(gid_t gid)
2536 for (i = 0; i < current_user.ut.ngroups; i++) {
2537 if (current_user.ut.groups[i] == gid) {
2545 /****************************************************************************
2546 Should we override a deny ? Check 'acl group control' and 'dos filemode'.
2547 ****************************************************************************/
2549 static bool acl_group_override(connection_struct *conn,
2554 if ((errno != EPERM) && (errno != EACCES)) {
2558 /* file primary group == user primary or supplementary group */
2559 if (lp_acl_group_control(SNUM(conn)) &&
2560 current_user_in_group(prim_gid)) {
2564 /* user has writeable permission */
2565 if (lp_dos_filemode(SNUM(conn))) {
2566 SMB_STRUCT_STAT sbuf;
2569 if (fsp->posix_open) {
2570 ret = SMB_VFS_LSTAT(conn,fsp->fsp_name,&sbuf);
2572 ret = SMB_VFS_STAT(conn,fsp->fsp_name,&sbuf);
2579 if (can_write_to_file(conn, fsp->fsp_name, &sbuf)) {
2587 /****************************************************************************
2588 Attempt to apply an ACL to a file or directory.
2589 ****************************************************************************/
2591 static bool set_canon_ace_list(files_struct *fsp, canon_ace *the_ace, bool default_ace, gid_t prim_gid, bool *pacl_set_support)
2593 connection_struct *conn = fsp->conn;
2595 SMB_ACL_T the_acl = SMB_VFS_SYS_ACL_INIT(conn, (int)count_canon_ace_list(the_ace) + 1);
2598 SMB_ACL_ENTRY_T mask_entry;
2599 bool got_mask_entry = False;
2600 SMB_ACL_PERMSET_T mask_permset;
2601 SMB_ACL_TYPE_T the_acl_type = (default_ace ? SMB_ACL_TYPE_DEFAULT : SMB_ACL_TYPE_ACCESS);
2602 bool needs_mask = False;
2603 mode_t mask_perms = 0;
2605 #if defined(POSIX_ACL_NEEDS_MASK)
2606 /* HP-UX always wants to have a mask (called "class" there). */
2610 if (the_acl == NULL) {
2612 if (!no_acl_syscall_error(errno)) {
2614 * Only print this error message if we have some kind of ACL
2615 * support that's not working. Otherwise we would always get this.
2617 DEBUG(0,("set_canon_ace_list: Unable to init %s ACL. (%s)\n",
2618 default_ace ? "default" : "file", strerror(errno) ));
2620 *pacl_set_support = False;
2624 if( DEBUGLVL( 10 )) {
2625 dbgtext("set_canon_ace_list: setting ACL:\n");
2626 for (i = 0, p_ace = the_ace; p_ace; p_ace = p_ace->next, i++ ) {
2627 print_canon_ace( p_ace, i);
2631 for (i = 0, p_ace = the_ace; p_ace; p_ace = p_ace->next, i++ ) {
2632 SMB_ACL_ENTRY_T the_entry;
2633 SMB_ACL_PERMSET_T the_permset;
2636 * ACLs only "need" an ACL_MASK entry if there are any named user or
2637 * named group entries. But if there is an ACL_MASK entry, it applies
2638 * to ACL_USER, ACL_GROUP, and ACL_GROUP_OBJ entries. Set the mask
2639 * so that it doesn't deny (i.e., mask off) any permissions.
2642 if (p_ace->type == SMB_ACL_USER || p_ace->type == SMB_ACL_GROUP) {
2644 mask_perms |= p_ace->perms;
2645 } else if (p_ace->type == SMB_ACL_GROUP_OBJ) {
2646 mask_perms |= p_ace->perms;
2650 * Get the entry for this ACE.
2653 if (SMB_VFS_SYS_ACL_CREATE_ENTRY(conn, &the_acl, &the_entry) == -1) {
2654 DEBUG(0,("set_canon_ace_list: Failed to create entry %d. (%s)\n",
2655 i, strerror(errno) ));
2659 if (p_ace->type == SMB_ACL_MASK) {
2660 mask_entry = the_entry;
2661 got_mask_entry = True;
2665 * Ok - we now know the ACL calls should be working, don't
2666 * allow fallback to chmod.
2669 *pacl_set_support = True;
2672 * Initialise the entry from the canon_ace.
2676 * First tell the entry what type of ACE this is.
2679 if (SMB_VFS_SYS_ACL_SET_TAG_TYPE(conn, the_entry, p_ace->type) == -1) {
2680 DEBUG(0,("set_canon_ace_list: Failed to set tag type on entry %d. (%s)\n",
2681 i, strerror(errno) ));
2686 * Only set the qualifier (user or group id) if the entry is a user
2690 if ((p_ace->type == SMB_ACL_USER) || (p_ace->type == SMB_ACL_GROUP)) {
2691 if (SMB_VFS_SYS_ACL_SET_QUALIFIER(conn, the_entry,(void *)&p_ace->unix_ug.uid) == -1) {
2692 DEBUG(0,("set_canon_ace_list: Failed to set qualifier on entry %d. (%s)\n",
2693 i, strerror(errno) ));
2699 * Convert the mode_t perms in the canon_ace to a POSIX permset.
2702 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, the_entry, &the_permset) == -1) {
2703 DEBUG(0,("set_canon_ace_list: Failed to get permset on entry %d. (%s)\n",
2704 i, strerror(errno) ));
2708 if (map_acl_perms_to_permset(conn, p_ace->perms, &the_permset) == -1) {
2709 DEBUG(0,("set_canon_ace_list: Failed to create permset for mode (%u) on entry %d. (%s)\n",
2710 (unsigned int)p_ace->perms, i, strerror(errno) ));
2715 * ..and apply them to the entry.
2718 if (SMB_VFS_SYS_ACL_SET_PERMSET(conn, the_entry, the_permset) == -1) {
2719 DEBUG(0,("set_canon_ace_list: Failed to add permset on entry %d. (%s)\n",
2720 i, strerror(errno) ));
2725 print_canon_ace( p_ace, i);
2729 if (needs_mask && !got_mask_entry) {
2730 if (SMB_VFS_SYS_ACL_CREATE_ENTRY(conn, &the_acl, &mask_entry) == -1) {
2731 DEBUG(0,("set_canon_ace_list: Failed to create mask entry. (%s)\n", strerror(errno) ));
2735 if (SMB_VFS_SYS_ACL_SET_TAG_TYPE(conn, mask_entry, SMB_ACL_MASK) == -1) {
2736 DEBUG(0,("set_canon_ace_list: Failed to set tag type on mask entry. (%s)\n",strerror(errno) ));
2740 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, mask_entry, &mask_permset) == -1) {
2741 DEBUG(0,("set_canon_ace_list: Failed to get mask permset. (%s)\n", strerror(errno) ));
2745 if (map_acl_perms_to_permset(conn, S_IRUSR|S_IWUSR|S_IXUSR, &mask_permset) == -1) {
2746 DEBUG(0,("set_canon_ace_list: Failed to create mask permset. (%s)\n", strerror(errno) ));
2750 if (SMB_VFS_SYS_ACL_SET_PERMSET(conn, mask_entry, mask_permset) == -1) {
2751 DEBUG(0,("set_canon_ace_list: Failed to add mask permset. (%s)\n", strerror(errno) ));
2757 * Finally apply it to the file or directory.
2760 if(default_ace || fsp->is_directory || fsp->fh->fd == -1) {
2761 if (SMB_VFS_SYS_ACL_SET_FILE(conn, fsp->fsp_name, the_acl_type, the_acl) == -1) {
2763 * Some systems allow all the above calls and only fail with no ACL support
2764 * when attempting to apply the acl. HPUX with HFS is an example of this. JRA.
2766 if (no_acl_syscall_error(errno)) {
2767 *pacl_set_support = False;
2770 if (acl_group_override(conn, prim_gid, fsp)) {
2773 DEBUG(5,("set_canon_ace_list: acl group control on and current user in file %s primary group.\n",
2777 sret = SMB_VFS_SYS_ACL_SET_FILE(conn, fsp->fsp_name, the_acl_type, the_acl);
2785 DEBUG(2,("set_canon_ace_list: sys_acl_set_file type %s failed for file %s (%s).\n",
2786 the_acl_type == SMB_ACL_TYPE_DEFAULT ? "directory default" : "file",
2787 fsp->fsp_name, strerror(errno) ));
2792 if (SMB_VFS_SYS_ACL_SET_FD(fsp, the_acl) == -1) {
2794 * Some systems allow all the above calls and only fail with no ACL support
2795 * when attempting to apply the acl. HPUX with HFS is an example of this. JRA.
2797 if (no_acl_syscall_error(errno)) {
2798 *pacl_set_support = False;
2801 if (acl_group_override(conn, prim_gid, fsp)) {
2804 DEBUG(5,("set_canon_ace_list: acl group control on and current user in file %s primary group.\n",
2808 sret = SMB_VFS_SYS_ACL_SET_FD(fsp, the_acl);
2816 DEBUG(2,("set_canon_ace_list: sys_acl_set_file failed for file %s (%s).\n",
2817 fsp->fsp_name, strerror(errno) ));
2827 if (the_acl != NULL) {
2828 SMB_VFS_SYS_ACL_FREE_ACL(conn, the_acl);
2834 /****************************************************************************
2835 Find a particular canon_ace entry.
2836 ****************************************************************************/
2838 static struct canon_ace *canon_ace_entry_for(struct canon_ace *list, SMB_ACL_TAG_T type, posix_id *id)
2841 if (list->type == type && ((type != SMB_ACL_USER && type != SMB_ACL_GROUP) ||
2842 (type == SMB_ACL_USER && id && id->uid == list->unix_ug.uid) ||
2843 (type == SMB_ACL_GROUP && id && id->gid == list->unix_ug.gid)))
2850 /****************************************************************************
2852 ****************************************************************************/
2854 SMB_ACL_T free_empty_sys_acl(connection_struct *conn, SMB_ACL_T the_acl)
2856 SMB_ACL_ENTRY_T entry;
2860 if (SMB_VFS_SYS_ACL_GET_ENTRY(conn, the_acl, SMB_ACL_FIRST_ENTRY, &entry) != 1) {
2861 SMB_VFS_SYS_ACL_FREE_ACL(conn, the_acl);
2867 /****************************************************************************
2868 Convert a canon_ace to a generic 3 element permission - if possible.
2869 ****************************************************************************/
2871 #define MAP_PERM(p,mask,result) (((p) & (mask)) ? (result) : 0 )
2873 static bool convert_canon_ace_to_posix_perms( files_struct *fsp, canon_ace *file_ace_list, mode_t *posix_perms)
2875 int snum = SNUM(fsp->conn);
2876 size_t ace_count = count_canon_ace_list(file_ace_list);
2878 canon_ace *owner_ace = NULL;
2879 canon_ace *group_ace = NULL;
2880 canon_ace *other_ace = NULL;
2884 if (ace_count != 3) {
2885 DEBUG(3,("convert_canon_ace_to_posix_perms: Too many ACE entries for file %s to convert to \
2886 posix perms.\n", fsp->fsp_name ));
2890 for (ace_p = file_ace_list; ace_p; ace_p = ace_p->next) {
2891 if (ace_p->owner_type == UID_ACE)
2893 else if (ace_p->owner_type == GID_ACE)
2895 else if (ace_p->owner_type == WORLD_ACE)
2899 if (!owner_ace || !group_ace || !other_ace) {
2900 DEBUG(3,("convert_canon_ace_to_posix_perms: Can't get standard entries for file %s.\n",
2905 *posix_perms = (mode_t)0;
2907 *posix_perms |= owner_ace->perms;
2908 *posix_perms |= MAP_PERM(group_ace->perms, S_IRUSR, S_IRGRP);
2909 *posix_perms |= MAP_PERM(group_ace->perms, S_IWUSR, S_IWGRP);
2910 *posix_perms |= MAP_PERM(group_ace->perms, S_IXUSR, S_IXGRP);
2911 *posix_perms |= MAP_PERM(other_ace->perms, S_IRUSR, S_IROTH);
2912 *posix_perms |= MAP_PERM(other_ace->perms, S_IWUSR, S_IWOTH);
2913 *posix_perms |= MAP_PERM(other_ace->perms, S_IXUSR, S_IXOTH);
2915 /* The owner must have at least read access. */
2917 *posix_perms |= S_IRUSR;
2918 if (fsp->is_directory)
2919 *posix_perms |= (S_IWUSR|S_IXUSR);
2921 /* If requested apply the masks. */
2923 /* Get the initial bits to apply. */
2925 if (fsp->is_directory) {
2926 and_bits = lp_dir_security_mask(snum);
2927 or_bits = lp_force_dir_security_mode(snum);
2929 and_bits = lp_security_mask(snum);
2930 or_bits = lp_force_security_mode(snum);
2933 *posix_perms = (((*posix_perms) & and_bits)|or_bits);
2935 DEBUG(10,("convert_canon_ace_to_posix_perms: converted u=%o,g=%o,w=%o to perm=0%o for file %s.\n",
2936 (int)owner_ace->perms, (int)group_ace->perms, (int)other_ace->perms, (int)*posix_perms,
2942 /****************************************************************************
2943 Incoming NT ACLs on a directory can be split into a default POSIX acl (CI|OI|IO) and
2944 a normal POSIX acl. Win2k needs these split acls re-merging into one ACL
2945 with CI|OI set so it is inherited and also applies to the directory.
2946 Based on code from "Jim McDonough" <jmcd@us.ibm.com>.
2947 ****************************************************************************/
2949 static size_t merge_default_aces( SEC_ACE *nt_ace_list, size_t num_aces)
2953 for (i = 0; i < num_aces; i++) {
2954 for (j = i+1; j < num_aces; j++) {
2955 uint32 i_flags_ni = (nt_ace_list[i].flags & ~SEC_ACE_FLAG_INHERITED_ACE);
2956 uint32 j_flags_ni = (nt_ace_list[j].flags & ~SEC_ACE_FLAG_INHERITED_ACE);
2957 bool i_inh = (nt_ace_list[i].flags & SEC_ACE_FLAG_INHERITED_ACE) ? True : False;
2958 bool j_inh = (nt_ace_list[j].flags & SEC_ACE_FLAG_INHERITED_ACE) ? True : False;
2960 /* We know the lower number ACE's are file entries. */
2961 if ((nt_ace_list[i].type == nt_ace_list[j].type) &&
2962 (nt_ace_list[i].size == nt_ace_list[j].size) &&
2963 (nt_ace_list[i].access_mask == nt_ace_list[j].access_mask) &&
2964 sid_equal(&nt_ace_list[i].trustee, &nt_ace_list[j].trustee) &&
2966 (i_flags_ni == 0) &&
2967 (j_flags_ni == (SEC_ACE_FLAG_OBJECT_INHERIT|
2968 SEC_ACE_FLAG_CONTAINER_INHERIT|
2969 SEC_ACE_FLAG_INHERIT_ONLY))) {
2971 * W2K wants to have access allowed zero access ACE's
2972 * at the end of the list. If the mask is zero, merge
2973 * the non-inherited ACE onto the inherited ACE.
2976 if (nt_ace_list[i].access_mask == 0) {
2977 nt_ace_list[j].flags = SEC_ACE_FLAG_OBJECT_INHERIT|SEC_ACE_FLAG_CONTAINER_INHERIT|
2978 (i_inh ? SEC_ACE_FLAG_INHERITED_ACE : 0);
2979 if (num_aces - i - 1 > 0)
2980 memmove(&nt_ace_list[i], &nt_ace_list[i+1], (num_aces-i-1) *
2983 DEBUG(10,("merge_default_aces: Merging zero access ACE %u onto ACE %u.\n",
2984 (unsigned int)i, (unsigned int)j ));
2987 * These are identical except for the flags.
2988 * Merge the inherited ACE onto the non-inherited ACE.
2991 nt_ace_list[i].flags = SEC_ACE_FLAG_OBJECT_INHERIT|SEC_ACE_FLAG_CONTAINER_INHERIT|
2992 (i_inh ? SEC_ACE_FLAG_INHERITED_ACE : 0);
2993 if (num_aces - j - 1 > 0)
2994 memmove(&nt_ace_list[j], &nt_ace_list[j+1], (num_aces-j-1) *
2997 DEBUG(10,("merge_default_aces: Merging ACE %u onto ACE %u.\n",
2998 (unsigned int)j, (unsigned int)i ));
3010 * Add or Replace ACE entry.
3011 * In some cases we need to add a specific ACE for compatibility reasons.
3012 * When doing that we must make sure we are not actually creating a duplicate
3013 * entry. So we need to search whether an ACE entry already exist and eventually
3014 * replacce the access mask, or add a completely new entry if none was found.
3016 * This function assumes the array has enough space to add a new entry without
3017 * any reallocation of memory.
3020 static void add_or_replace_ace(SEC_ACE *nt_ace_list, size_t *num_aces,
3021 const DOM_SID *sid, enum security_ace_type type,
3022 uint32_t mask, uint8_t flags)
3026 /* first search for a duplicate */
3027 for (i = 0; i < *num_aces; i++) {
3028 if (sid_equal(&nt_ace_list[i].trustee, sid) &&
3029 (nt_ace_list[i].flags == flags)) break;
3032 if (i < *num_aces) { /* found */
3033 nt_ace_list[i].type = type;
3034 nt_ace_list[i].access_mask = mask;
3035 DEBUG(10, ("Replacing ACE %d with SID %s and flags %02x\n",
3036 i, sid_string_dbg(sid), flags));
3040 /* not found, append it */
3041 init_sec_ace(&nt_ace_list[(*num_aces)++], sid, type, mask, flags);
3045 /****************************************************************************
3046 Reply to query a security descriptor from an fsp. If it succeeds it allocates
3047 the space for the return elements and returns the size needed to return the
3048 security descriptor. This should be the only external function needed for
3049 the UNIX style get ACL.
3050 ****************************************************************************/
3052 static NTSTATUS posix_get_nt_acl_common(struct connection_struct *conn,
3054 const SMB_STRUCT_STAT *sbuf,
3055 struct pai_val *pal,
3056 SMB_ACL_T posix_acl,
3058 uint32_t security_info,
3064 SEC_ACL *psa = NULL;
3065 size_t num_acls = 0;
3066 size_t num_def_acls = 0;
3067 size_t num_aces = 0;
3068 canon_ace *file_ace = NULL;
3069 canon_ace *dir_ace = NULL;
3070 SEC_ACE *nt_ace_list = NULL;
3071 size_t num_profile_acls = 0;
3072 DOM_SID orig_owner_sid;
3073 SEC_DESC *psd = NULL;
3077 * Get the owner, group and world SIDs.
3080 create_file_sids(sbuf, &owner_sid, &group_sid);
3082 if (lp_profile_acls(SNUM(conn))) {
3083 /* For WXP SP1 the owner must be administrators. */
3084 sid_copy(&orig_owner_sid, &owner_sid);
3085 sid_copy(&owner_sid, &global_sid_Builtin_Administrators);
3086 sid_copy(&group_sid, &global_sid_Builtin_Users);
3087 num_profile_acls = 3;
3090 if ((security_info & DACL_SECURITY_INFORMATION) && !(security_info & PROTECTED_DACL_SECURITY_INFORMATION)) {
3093 * In the optimum case Creator Owner and Creator Group would be used for
3094 * the ACL_USER_OBJ and ACL_GROUP_OBJ entries, respectively, but this
3095 * would lead to usability problems under Windows: The Creator entries
3096 * are only available in browse lists of directories and not for files;
3097 * additionally the identity of the owning group couldn't be determined.
3098 * We therefore use those identities only for Default ACLs.
3101 /* Create the canon_ace lists. */
3102 file_ace = canonicalise_acl(conn, name, posix_acl, sbuf,
3103 &owner_sid, &group_sid, pal,
3104 SMB_ACL_TYPE_ACCESS);
3106 /* We must have *some* ACLS. */
3108 if (count_canon_ace_list(file_ace) == 0) {
3109 DEBUG(0,("get_nt_acl : No ACLs on file (%s) !\n", name));
3113 if (S_ISDIR(sbuf->st_ex_mode) && def_acl) {
3114 dir_ace = canonicalise_acl(conn, name, def_acl,
3116 &global_sid_Creator_Owner,
3117 &global_sid_Creator_Group,
3118 pal, SMB_ACL_TYPE_DEFAULT);
3122 * Create the NT ACE list from the canonical ace lists.
3127 enum security_ace_type nt_acl_type;
3129 if (nt4_compatible_acls() && dir_ace) {
3131 * NT 4 chokes if an ACL contains an INHERIT_ONLY entry
3132 * but no non-INHERIT_ONLY entry for one SID. So we only
3133 * remove entries from the Access ACL if the
3134 * corresponding Default ACL entries have also been
3135 * removed. ACEs for CREATOR-OWNER and CREATOR-GROUP
3136 * are exceptions. We can do nothing
3137 * intelligent if the Default ACL contains entries that
3138 * are not also contained in the Access ACL, so this
3139 * case will still fail under NT 4.
3142 ace = canon_ace_entry_for(dir_ace, SMB_ACL_OTHER, NULL);
3143 if (ace && !ace->perms) {
3144 DLIST_REMOVE(dir_ace, ace);
3147 ace = canon_ace_entry_for(file_ace, SMB_ACL_OTHER, NULL);
3148 if (ace && !ace->perms) {
3149 DLIST_REMOVE(file_ace, ace);
3155 * WinNT doesn't usually have Creator Group
3156 * in browse lists, so we send this entry to
3157 * WinNT even if it contains no relevant
3158 * permissions. Once we can add
3159 * Creator Group to browse lists we can
3164 ace = canon_ace_entry_for(dir_ace, SMB_ACL_GROUP_OBJ, NULL);
3165 if (ace && !ace->perms) {
3166 DLIST_REMOVE(dir_ace, ace);
3171 ace = canon_ace_entry_for(file_ace, SMB_ACL_GROUP_OBJ, NULL);
3172 if (ace && !ace->perms) {
3173 DLIST_REMOVE(file_ace, ace);
3178 num_acls = count_canon_ace_list(file_ace);
3179 num_def_acls = count_canon_ace_list(dir_ace);
3181 /* Allocate the ace list. */
3182 if ((nt_ace_list = SMB_MALLOC_ARRAY(SEC_ACE,num_acls + num_profile_acls + num_def_acls)) == NULL) {
3183 DEBUG(0,("get_nt_acl: Unable to malloc space for nt_ace_list.\n"));
3187 memset(nt_ace_list, '\0', (num_acls + num_def_acls) * sizeof(SEC_ACE) );
3190 * Create the NT ACE list from the canonical ace lists.
3193 for (ace = file_ace; ace != NULL; ace = ace->next) {
3194 uint32_t acc = map_canon_ace_perms(SNUM(conn),
3197 S_ISDIR(sbuf->st_ex_mode));
3198 init_sec_ace(&nt_ace_list[num_aces++],
3205 /* The User must have access to a profile share - even
3206 * if we can't map the SID. */
3207 if (lp_profile_acls(SNUM(conn))) {
3208 add_or_replace_ace(nt_ace_list, &num_aces,
3209 &global_sid_Builtin_Users,
3210 SEC_ACE_TYPE_ACCESS_ALLOWED,
3211 FILE_GENERIC_ALL, 0);
3214 for (ace = dir_ace; ace != NULL; ace = ace->next) {
3215 uint32_t acc = map_canon_ace_perms(SNUM(conn),
3218 S_ISDIR(sbuf->st_ex_mode));
3219 init_sec_ace(&nt_ace_list[num_aces++],
3224 SEC_ACE_FLAG_OBJECT_INHERIT|
3225 SEC_ACE_FLAG_CONTAINER_INHERIT|
3226 SEC_ACE_FLAG_INHERIT_ONLY);
3229 /* The User must have access to a profile share - even
3230 * if we can't map the SID. */
3231 if (lp_profile_acls(SNUM(conn))) {
3232 add_or_replace_ace(nt_ace_list, &num_aces,
3233 &global_sid_Builtin_Users,
3234 SEC_ACE_TYPE_ACCESS_ALLOWED,
3236 SEC_ACE_FLAG_OBJECT_INHERIT |
3237 SEC_ACE_FLAG_CONTAINER_INHERIT |
3238 SEC_ACE_FLAG_INHERIT_ONLY);
3242 * Merge POSIX default ACLs and normal ACLs into one NT ACE.
3243 * Win2K needs this to get the inheritance correct when replacing ACLs
3244 * on a directory tree. Based on work by Jim @ IBM.
3247 num_aces = merge_default_aces(nt_ace_list, num_aces);
3249 if (lp_profile_acls(SNUM(conn))) {
3250 for (i = 0; i < num_aces; i++) {
3251 if (sid_equal(&nt_ace_list[i].trustee, &owner_sid)) {
3252 add_or_replace_ace(nt_ace_list, &num_aces,
3254 nt_ace_list[i].type,
3255 nt_ace_list[i].access_mask,
3256 nt_ace_list[i].flags);
3264 if((psa = make_sec_acl( talloc_tos(), NT4_ACL_REVISION, num_aces, nt_ace_list)) == NULL) {
3265 DEBUG(0,("get_nt_acl: Unable to malloc space for acl.\n"));
3269 } /* security_info & DACL_SECURITY_INFORMATION */
3271 psd = make_standard_sec_desc( talloc_tos(),
3272 (security_info & OWNER_SECURITY_INFORMATION) ? &owner_sid : NULL,
3273 (security_info & GROUP_SECURITY_INFORMATION) ? &group_sid : NULL,
3278 DEBUG(0,("get_nt_acl: Unable to malloc space for security descriptor.\n"));
3284 * Windows 2000: The DACL_PROTECTED flag in the security
3285 * descriptor marks the ACL as non-inheriting, i.e., no
3286 * ACEs from higher level directories propagate to this
3287 * ACL. In the POSIX ACL model permissions are only
3288 * inherited at file create time, so ACLs never contain
3289 * any ACEs that are inherited dynamically. The DACL_PROTECTED
3290 * flag doesn't seem to bother Windows NT.
3291 * Always set this if map acl inherit is turned off.
3293 if (pal == NULL || !lp_map_acl_inherit(SNUM(conn))) {
3294 psd->type |= SEC_DESC_DACL_PROTECTED;
3296 psd->type |= pal->sd_type;
3300 dacl_sort_into_canonical_order(psd->dacl->aces, (unsigned int)psd->dacl->num_aces);
3308 SMB_VFS_SYS_ACL_FREE_ACL(conn, posix_acl);
3311 SMB_VFS_SYS_ACL_FREE_ACL(conn, def_acl);
3313 free_canon_ace_list(file_ace);
3314 free_canon_ace_list(dir_ace);
3315 free_inherited_info(pal);
3316 SAFE_FREE(nt_ace_list);
3318 return NT_STATUS_OK;
3321 NTSTATUS posix_fget_nt_acl(struct files_struct *fsp, uint32_t security_info,
3324 SMB_STRUCT_STAT sbuf;
3325 SMB_ACL_T posix_acl = NULL;
3326 struct pai_val *pal;
3330 DEBUG(10,("posix_fget_nt_acl: called for file %s\n", fsp->fsp_name ));
3332 /* can it happen that fsp_name == NULL ? */
3333 if (fsp->is_directory || fsp->fh->fd == -1) {
3334 return posix_get_nt_acl(fsp->conn, fsp->fsp_name,
3335 security_info, ppdesc);
3338 /* Get the stat struct for the owner info. */
3339 if(SMB_VFS_FSTAT(fsp, &sbuf) != 0) {
3340 return map_nt_error_from_unix(errno);
3343 /* Get the ACL from the fd. */
3344 posix_acl = SMB_VFS_SYS_ACL_GET_FD(fsp);
3346 pal = fload_inherited_info(fsp);
3348 return posix_get_nt_acl_common(fsp->conn, fsp->fsp_name, &sbuf, pal,
3349 posix_acl, NULL, security_info, ppdesc);
3352 NTSTATUS posix_get_nt_acl(struct connection_struct *conn, const char *name,
3353 uint32_t security_info, SEC_DESC **ppdesc)
3355 SMB_STRUCT_STAT sbuf;
3356 SMB_ACL_T posix_acl = NULL;
3357 SMB_ACL_T def_acl = NULL;
3358 struct pai_val *pal;
3362 DEBUG(10,("posix_get_nt_acl: called for file %s\n", name ));
3364 /* Get the stat struct for the owner info. */
3365 if(SMB_VFS_STAT(conn, name, &sbuf) != 0) {
3366 return map_nt_error_from_unix(errno);
3369 /* Get the ACL from the path. */
3370 posix_acl = SMB_VFS_SYS_ACL_GET_FILE(conn, name, SMB_ACL_TYPE_ACCESS);
3372 /* If it's a directory get the default POSIX ACL. */
3373 if(S_ISDIR(sbuf.st_ex_mode)) {
3374 def_acl = SMB_VFS_SYS_ACL_GET_FILE(conn, name, SMB_ACL_TYPE_DEFAULT);
3375 def_acl = free_empty_sys_acl(conn, def_acl);
3378 pal = load_inherited_info(conn, name);
3380 return posix_get_nt_acl_common(conn, name, &sbuf, pal, posix_acl,
3381 def_acl, security_info, ppdesc);
3384 /****************************************************************************
3385 Try to chown a file. We will be able to chown it under the following conditions.
3387 1) If we have root privileges, then it will just work.
3388 2) If we have SeTakeOwnershipPrivilege we can change the user to the current user.
3389 3) If we have SeRestorePrivilege we can change the user to any other user.
3390 4) If we have write permission to the file and dos_filemodes is set
3391 then allow chown to the currently authenticated user.
3392 ****************************************************************************/
3394 int try_chown(connection_struct *conn, const char *fname, uid_t uid, gid_t gid)
3400 if(!CAN_WRITE(conn)) {
3405 /* try the direct way first */
3406 ret = SMB_VFS_CHOWN(conn, fname, uid, gid);
3410 /* Case (2) / (3) */
3411 if (lp_enable_privileges()) {
3413 bool has_take_ownership_priv = user_has_privileges(current_user.nt_user_token,
3414 &se_take_ownership);
3415 bool has_restore_priv = user_has_privileges(current_user.nt_user_token,
3419 if ( ( has_take_ownership_priv && ( uid == current_user.ut.uid ) ) ||
3421 ( has_restore_priv ) ) {
3424 /* Keep the current file gid the same - take ownership doesn't imply group change. */
3425 ret = SMB_VFS_CHOWN(conn, fname, uid, (gid_t)-1);
3432 if (!lp_dos_filemode(SNUM(conn))) {
3437 /* only allow chown to the current user. This is more secure,
3438 and also copes with the case where the SID in a take ownership ACL is
3439 a local SID on the users workstation
3441 if (uid != current_user.ut.uid) {
3446 if (SMB_VFS_STAT(conn,fname,&st)) {
3450 if (!NT_STATUS_IS_OK(open_file_fchmod(NULL, conn, fname, &st, &fsp))) {
3455 /* Keep the current file gid the same. */
3456 ret = SMB_VFS_FCHOWN(fsp, uid, (gid_t)-1);
3459 close_file_fchmod(NULL, fsp);
3465 /* Disable this - prevents ACL inheritance from the ACL editor. JRA. */
3467 /****************************************************************************
3468 Take care of parent ACL inheritance.
3469 ****************************************************************************/
3471 NTSTATUS append_parent_acl(files_struct *fsp,
3472 const SEC_DESC *pcsd,
3473 SEC_DESC **pp_new_sd)
3475 struct smb_filename *smb_dname = NULL;
3476 SEC_DESC *parent_sd = NULL;
3477 files_struct *parent_fsp = NULL;
3478 TALLOC_CTX *mem_ctx = talloc_tos();
3479 char *parent_name = NULL;
3480 SEC_ACE *new_ace = NULL;
3481 unsigned int num_aces = pcsd->dacl->num_aces;
3485 SEC_DESC *psd = dup_sec_desc(talloc_tos(), pcsd);
3486 bool is_dacl_protected = (pcsd->type & SEC_DESC_DACL_PROTECTED);
3489 return NT_STATUS_NO_MEMORY;
3492 if (!parent_dirname(mem_ctx, fsp->fsp_name, &parent_name, NULL)) {
3493 return NT_STATUS_NO_MEMORY;
3496 status = create_synthetic_smb_fname_split(mem_ctx, parent_name, NULL,
3498 if (!NT_STATUS_IS_OK(status)) {
3502 status = SMB_VFS_CREATE_FILE(
3503 fsp->conn, /* conn */
3505 0, /* root_dir_fid */
3506 smb_dname, /* fname */
3507 FILE_READ_ATTRIBUTES, /* access_mask */
3508 FILE_SHARE_NONE, /* share_access */
3509 FILE_OPEN, /* create_disposition*/
3510 FILE_DIRECTORY_FILE, /* create_options */
3511 0, /* file_attributes */
3512 INTERNAL_OPEN_ONLY, /* oplock_request */
3513 0, /* allocation_size */
3516 &parent_fsp, /* result */
3519 TALLOC_FREE(smb_fname);
3521 if (!NT_STATUS_IS_OK(status)) {
3525 status = SMB_VFS_GET_NT_ACL(parent_fsp->conn, parent_fsp->fsp_name,
3526 DACL_SECURITY_INFORMATION, &parent_sd );
3528 close_file(NULL, parent_fsp, NORMAL_CLOSE);
3530 if (!NT_STATUS_IS_OK(status)) {
3535 * Make room for potentially all the ACLs from
3536 * the parent. We used to add the ugw triple here,
3537 * as we knew we were dealing with POSIX ACLs.
3538 * We no longer need to do so as we can guarentee
3539 * that a default ACL from the parent directory will
3540 * be well formed for POSIX ACLs if it came from a
3541 * POSIX ACL source, and if we're not writing to a
3542 * POSIX ACL sink then we don't care if it's not well
3546 num_aces += parent_sd->dacl->num_aces;
3548 if((new_ace = TALLOC_ZERO_ARRAY(mem_ctx, SEC_ACE,
3549 num_aces)) == NULL) {
3550 return NT_STATUS_NO_MEMORY;
3553 /* Start by copying in all the given ACE entries. */
3554 for (i = 0; i < psd->dacl->num_aces; i++) {
3555 sec_ace_copy(&new_ace[i], &psd->dacl->aces[i]);
3559 * Note that we're ignoring "inherit permissions" here
3560 * as that really only applies to newly created files. JRA.
3563 /* Finally append any inherited ACEs. */
3564 for (j = 0; j < parent_sd->dacl->num_aces; j++) {
3565 SEC_ACE *se = &parent_sd->dacl->aces[j];
3567 if (fsp->is_directory) {
3568 if (!(se->flags & SEC_ACE_FLAG_CONTAINER_INHERIT)) {
3569 /* Doesn't apply to a directory - ignore. */
3570 DEBUG(10,("append_parent_acl: directory %s "
3571 "ignoring non container "
3572 "inherit flags %u on ACE with sid %s "
3575 (unsigned int)se->flags,
3576 sid_string_dbg(&se->trustee),
3581 if (!(se->flags & SEC_ACE_FLAG_OBJECT_INHERIT)) {
3582 /* Doesn't apply to a file - ignore. */
3583 DEBUG(10,("append_parent_acl: file %s "
3584 "ignoring non object "
3585 "inherit flags %u on ACE with sid %s "
3588 (unsigned int)se->flags,
3589 sid_string_dbg(&se->trustee),
3595 if (is_dacl_protected) {
3596 /* If the DACL is protected it means we must
3597 * not overwrite an existing ACE entry with the
3598 * same SID. This is order N^2. Ouch :-(. JRA. */
3600 for (k = 0; k < psd->dacl->num_aces; k++) {
3601 if (sid_equal(&psd->dacl->aces[k].trustee,
3606 if (k < psd->dacl->num_aces) {
3607 /* SID matched. Ignore. */
3608 DEBUG(10,("append_parent_acl: path %s "
3609 "ignoring ACE with protected sid %s "
3612 sid_string_dbg(&se->trustee),
3618 sec_ace_copy(&new_ace[i], se);
3619 if (se->flags & SEC_ACE_FLAG_NO_PROPAGATE_INHERIT) {
3620 new_ace[i].flags &= ~(SEC_ACE_FLAG_VALID_INHERIT);
3622 new_ace[i].flags |= SEC_ACE_FLAG_INHERITED_ACE;
3624 if (fsp->is_directory) {
3626 * Strip off any inherit only. It's applied.
3628 new_ace[i].flags &= ~(SEC_ACE_FLAG_INHERIT_ONLY);
3629 if (se->flags & SEC_ACE_FLAG_NO_PROPAGATE_INHERIT) {
3630 /* No further inheritance. */
3632 ~(SEC_ACE_FLAG_CONTAINER_INHERIT|
3633 SEC_ACE_FLAG_OBJECT_INHERIT);
3637 * Strip off any container or inherit
3638 * flags, they can't apply to objects.
3640 new_ace[i].flags &= ~(SEC_ACE_FLAG_CONTAINER_INHERIT|
3641 SEC_ACE_FLAG_INHERIT_ONLY|
3642 SEC_ACE_FLAG_NO_PROPAGATE_INHERIT);
3646 DEBUG(10,("append_parent_acl: path %s "
3647 "inheriting ACE with sid %s "
3650 sid_string_dbg(&se->trustee),
3654 psd->dacl->aces = new_ace;
3655 psd->dacl->num_aces = i;
3656 psd->type &= ~(SE_DESC_DACL_AUTO_INHERITED|
3657 SE_DESC_DACL_AUTO_INHERIT_REQ);
3664 /****************************************************************************
3665 Reply to set a security descriptor on an fsp. security_info_sent is the
3666 description of the following NT ACL.
3667 This should be the only external function needed for the UNIX style set ACL.
3668 ****************************************************************************/
3670 NTSTATUS set_nt_acl(files_struct *fsp, uint32 security_info_sent, const SEC_DESC *psd)
3672 connection_struct *conn = fsp->conn;
3673 uid_t user = (uid_t)-1;
3674 gid_t grp = (gid_t)-1;
3675 SMB_STRUCT_STAT sbuf;
3676 DOM_SID file_owner_sid;
3677 DOM_SID file_grp_sid;
3678 canon_ace *file_ace_list = NULL;
3679 canon_ace *dir_ace_list = NULL;
3680 bool acl_perms = False;
3681 mode_t orig_mode = (mode_t)0;
3683 bool set_acl_as_root = false;
3684 bool acl_set_support = false;
3687 DEBUG(10,("set_nt_acl: called for file %s\n", fsp->fsp_name ));
3689 if (!CAN_WRITE(conn)) {
3690 DEBUG(10,("set acl rejected on read-only share\n"));
3691 return NT_STATUS_MEDIA_WRITE_PROTECTED;
3695 * Get the current state of the file.
3698 if(fsp->is_directory || fsp->fh->fd == -1) {
3699 if(SMB_VFS_STAT(fsp->conn,fsp->fsp_name, &sbuf) != 0)
3700 return map_nt_error_from_unix(errno);
3702 if(SMB_VFS_FSTAT(fsp, &sbuf) != 0)
3703 return map_nt_error_from_unix(errno);
3706 /* Save the original element we check against. */
3707 orig_mode = sbuf.st_ex_mode;
3710 * Unpack the user/group/world id's.
3713 status = unpack_nt_owners( SNUM(conn), &user, &grp, security_info_sent, psd);
3714 if (!NT_STATUS_IS_OK(status)) {
3719 * Do we need to chown ? If so this must be done first as the incoming
3720 * CREATOR_OWNER acl will be relative to the *new* owner, not the old.
3724 if (((user != (uid_t)-1) && (sbuf.st_ex_uid != user)) || (( grp != (gid_t)-1) && (sbuf.st_ex_gid != grp))) {
3726 DEBUG(3,("set_nt_acl: chown %s. uid = %u, gid = %u.\n",
3727 fsp->fsp_name, (unsigned int)user, (unsigned int)grp ));
3729 if(try_chown( fsp->conn, fsp->fsp_name, user, grp) == -1) {
3730 DEBUG(3,("set_nt_acl: chown %s, %u, %u failed. Error = %s.\n",
3731 fsp->fsp_name, (unsigned int)user, (unsigned int)grp, strerror(errno) ));
3732 if (errno == EPERM) {
3733 return NT_STATUS_INVALID_OWNER;
3735 return map_nt_error_from_unix(errno);
3739 * Recheck the current state of the file, which may have changed.
3740 * (suid/sgid bits, for instance)
3743 if(fsp->is_directory) {
3744 if(SMB_VFS_STAT(fsp->conn, fsp->fsp_name, &sbuf) != 0) {
3745 return map_nt_error_from_unix(errno);
3751 if(fsp->fh->fd == -1)
3752 sret = SMB_VFS_STAT(fsp->conn, fsp->fsp_name, &sbuf);
3754 sret = SMB_VFS_FSTAT(fsp, &sbuf);
3757 return map_nt_error_from_unix(errno);
3760 /* Save the original element we check against. */
3761 orig_mode = sbuf.st_ex_mode;
3763 /* If we successfully chowned, we know we must
3764 * be able to set the acl, so do it as root.
3766 set_acl_as_root = true;
3769 create_file_sids(&sbuf, &file_owner_sid, &file_grp_sid);
3771 acl_perms = unpack_canon_ace( fsp, &sbuf, &file_owner_sid, &file_grp_sid,
3772 &file_ace_list, &dir_ace_list, security_info_sent, psd);
3774 /* Ignore W2K traverse DACL set. */
3775 if (!file_ace_list && !dir_ace_list) {
3776 return NT_STATUS_OK;
3780 DEBUG(3,("set_nt_acl: cannot set permissions\n"));
3781 free_canon_ace_list(file_ace_list);
3782 free_canon_ace_list(dir_ace_list);
3783 return NT_STATUS_ACCESS_DENIED;
3787 * Only change security if we got a DACL.
3790 if(!(security_info_sent & DACL_SECURITY_INFORMATION) || (psd->dacl == NULL)) {
3791 free_canon_ace_list(file_ace_list);
3792 free_canon_ace_list(dir_ace_list);
3793 return NT_STATUS_OK;
3797 * Try using the POSIX ACL set first. Fall back to chmod if
3798 * we have no ACL support on this filesystem.
3801 if (acl_perms && file_ace_list) {
3802 if (set_acl_as_root) {
3805 ret = set_canon_ace_list(fsp, file_ace_list, False, sbuf.st_ex_gid, &acl_set_support);
3806 if (set_acl_as_root) {
3809 if (acl_set_support && ret == false) {
3810 DEBUG(3,("set_nt_acl: failed to set file acl on file %s (%s).\n", fsp->fsp_name, strerror(errno) ));
3811 free_canon_ace_list(file_ace_list);
3812 free_canon_ace_list(dir_ace_list);
3813 return map_nt_error_from_unix(errno);
3817 if (acl_perms && acl_set_support && fsp->is_directory) {
3819 if (set_acl_as_root) {
3822 ret = set_canon_ace_list(fsp, dir_ace_list, True, sbuf.st_ex_gid, &acl_set_support);
3823 if (set_acl_as_root) {
3827 DEBUG(3,("set_nt_acl: failed to set default acl on directory %s (%s).\n", fsp->fsp_name, strerror(errno) ));
3828 free_canon_ace_list(file_ace_list);
3829 free_canon_ace_list(dir_ace_list);
3830 return map_nt_error_from_unix(errno);
3836 * No default ACL - delete one if it exists.
3839 if (set_acl_as_root) {
3842 sret = SMB_VFS_SYS_ACL_DELETE_DEF_FILE(conn, fsp->fsp_name);
3843 if (set_acl_as_root) {
3847 if (acl_group_override(conn, sbuf.st_ex_gid, fsp)) {
3848 DEBUG(5,("set_nt_acl: acl group control on and "
3849 "current user in file %s primary group. Override delete_def_acl\n",
3853 sret = SMB_VFS_SYS_ACL_DELETE_DEF_FILE(conn, fsp->fsp_name);
3858 DEBUG(3,("set_nt_acl: sys_acl_delete_def_file failed (%s)\n", strerror(errno)));
3859 free_canon_ace_list(file_ace_list);
3860 free_canon_ace_list(dir_ace_list);
3861 return map_nt_error_from_unix(errno);
3867 if (acl_set_support) {
3868 if (set_acl_as_root) {
3871 store_inheritance_attributes(fsp,
3875 if (set_acl_as_root) {
3881 * If we cannot set using POSIX ACLs we fall back to checking if we need to chmod.
3884 if(!acl_set_support && acl_perms) {
3887 if (!convert_canon_ace_to_posix_perms( fsp, file_ace_list, &posix_perms)) {
3888 free_canon_ace_list(file_ace_list);
3889 free_canon_ace_list(dir_ace_list);
3890 DEBUG(3,("set_nt_acl: failed to convert file acl to posix permissions for file %s.\n",
3892 return NT_STATUS_ACCESS_DENIED;
3895 if (orig_mode != posix_perms) {
3898 DEBUG(3,("set_nt_acl: chmod %s. perms = 0%o.\n",
3899 fsp->fsp_name, (unsigned int)posix_perms ));
3901 if (set_acl_as_root) {
3904 sret = SMB_VFS_CHMOD(conn,fsp->fsp_name, posix_perms);
3905 if (set_acl_as_root) {
3909 if (acl_group_override(conn, sbuf.st_ex_gid, fsp)) {
3910 DEBUG(5,("set_nt_acl: acl group control on and "
3911 "current user in file %s primary group. Override chmod\n",
3915 sret = SMB_VFS_CHMOD(conn,fsp->fsp_name, posix_perms);
3920 DEBUG(3,("set_nt_acl: chmod %s, 0%o failed. Error = %s.\n",
3921 fsp->fsp_name, (unsigned int)posix_perms, strerror(errno) ));
3922 free_canon_ace_list(file_ace_list);
3923 free_canon_ace_list(dir_ace_list);
3924 return map_nt_error_from_unix(errno);
3930 free_canon_ace_list(file_ace_list);
3931 free_canon_ace_list(dir_ace_list);
3933 return NT_STATUS_OK;
3936 /****************************************************************************
3937 Get the actual group bits stored on a file with an ACL. Has no effect if
3938 the file has no ACL. Needed in dosmode code where the stat() will return
3939 the mask bits, not the real group bits, for a file with an ACL.
3940 ****************************************************************************/
3942 int get_acl_group_bits( connection_struct *conn, const char *fname, mode_t *mode )
3944 int entry_id = SMB_ACL_FIRST_ENTRY;
3945 SMB_ACL_ENTRY_T entry;
3946 SMB_ACL_T posix_acl;
3949 posix_acl = SMB_VFS_SYS_ACL_GET_FILE(conn, fname, SMB_ACL_TYPE_ACCESS);
3950 if (posix_acl == (SMB_ACL_T)NULL)
3953 while (SMB_VFS_SYS_ACL_GET_ENTRY(conn, posix_acl, entry_id, &entry) == 1) {
3954 SMB_ACL_TAG_T tagtype;
3955 SMB_ACL_PERMSET_T permset;
3957 entry_id = SMB_ACL_NEXT_ENTRY;
3959 if (SMB_VFS_SYS_ACL_GET_TAG_TYPE(conn, entry, &tagtype) ==-1)
3962 if (tagtype == SMB_ACL_GROUP_OBJ) {
3963 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, entry, &permset) == -1) {
3966 *mode &= ~(S_IRGRP|S_IWGRP|S_IXGRP);
3967 *mode |= (SMB_VFS_SYS_ACL_GET_PERM(conn, permset, SMB_ACL_READ) ? S_IRGRP : 0);
3968 *mode |= (SMB_VFS_SYS_ACL_GET_PERM(conn, permset, SMB_ACL_WRITE) ? S_IWGRP : 0);
3969 *mode |= (SMB_VFS_SYS_ACL_GET_PERM(conn, permset, SMB_ACL_EXECUTE) ? S_IXGRP : 0);
3975 SMB_VFS_SYS_ACL_FREE_ACL(conn, posix_acl);
3979 /****************************************************************************
3980 Do a chmod by setting the ACL USER_OBJ, GROUP_OBJ and OTHER bits in an ACL
3981 and set the mask to rwx. Needed to preserve complex ACLs set by NT.
3982 ****************************************************************************/
3984 static int chmod_acl_internals( connection_struct *conn, SMB_ACL_T posix_acl, mode_t mode)
3986 int entry_id = SMB_ACL_FIRST_ENTRY;
3987 SMB_ACL_ENTRY_T entry;
3988 int num_entries = 0;
3990 while ( SMB_VFS_SYS_ACL_GET_ENTRY(conn, posix_acl, entry_id, &entry) == 1) {
3991 SMB_ACL_TAG_T tagtype;
3992 SMB_ACL_PERMSET_T permset;
3995 entry_id = SMB_ACL_NEXT_ENTRY;
3997 if (SMB_VFS_SYS_ACL_GET_TAG_TYPE(conn, entry, &tagtype) == -1)
4000 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, entry, &permset) == -1)
4006 case SMB_ACL_USER_OBJ:
4007 perms = unix_perms_to_acl_perms(mode, S_IRUSR, S_IWUSR, S_IXUSR);
4009 case SMB_ACL_GROUP_OBJ:
4010 perms = unix_perms_to_acl_perms(mode, S_IRGRP, S_IWGRP, S_IXGRP);
4014 * FIXME: The ACL_MASK entry permissions should really be set to
4015 * the union of the permissions of all ACL_USER,
4016 * ACL_GROUP_OBJ, and ACL_GROUP entries. That's what
4017 * acl_calc_mask() does, but Samba ACLs doesn't provide it.
4019 perms = S_IRUSR|S_IWUSR|S_IXUSR;
4022 perms = unix_perms_to_acl_perms(mode, S_IROTH, S_IWOTH, S_IXOTH);
4028 if (map_acl_perms_to_permset(conn, perms, &permset) == -1)
4031 if (SMB_VFS_SYS_ACL_SET_PERMSET(conn, entry, permset) == -1)
4036 * If this is a simple 3 element ACL or no elements then it's a standard
4037 * UNIX permission set. Just use chmod...
4040 if ((num_entries == 3) || (num_entries == 0))
4046 /****************************************************************************
4047 Get the access ACL of FROM, do a chmod by setting the ACL USER_OBJ,
4048 GROUP_OBJ and OTHER bits in an ACL and set the mask to rwx. Set the
4049 resulting ACL on TO. Note that name is in UNIX character set.
4050 ****************************************************************************/
4052 static int copy_access_posix_acl(connection_struct *conn, const char *from, const char *to, mode_t mode)
4054 SMB_ACL_T posix_acl = NULL;
4057 if ((posix_acl = SMB_VFS_SYS_ACL_GET_FILE(conn, from, SMB_ACL_TYPE_ACCESS)) == NULL)
4060 if ((ret = chmod_acl_internals(conn, posix_acl, mode)) == -1)
4063 ret = SMB_VFS_SYS_ACL_SET_FILE(conn, to, SMB_ACL_TYPE_ACCESS, posix_acl);
4067 SMB_VFS_SYS_ACL_FREE_ACL(conn, posix_acl);
4071 /****************************************************************************
4072 Do a chmod by setting the ACL USER_OBJ, GROUP_OBJ and OTHER bits in an ACL
4073 and set the mask to rwx. Needed to preserve complex ACLs set by NT.
4074 Note that name is in UNIX character set.
4075 ****************************************************************************/
4077 int chmod_acl(connection_struct *conn, const char *name, mode_t mode)
4079 return copy_access_posix_acl(conn, name, name, mode);
4082 /****************************************************************************
4083 Check for an existing default POSIX ACL on a directory.
4084 ****************************************************************************/
4086 static bool directory_has_default_posix_acl(connection_struct *conn, const char *fname)
4088 SMB_ACL_T def_acl = SMB_VFS_SYS_ACL_GET_FILE( conn, fname, SMB_ACL_TYPE_DEFAULT);
4089 bool has_acl = False;
4090 SMB_ACL_ENTRY_T entry;
4092 if (def_acl != NULL && (SMB_VFS_SYS_ACL_GET_ENTRY(conn, def_acl, SMB_ACL_FIRST_ENTRY, &entry) == 1)) {
4097 SMB_VFS_SYS_ACL_FREE_ACL(conn, def_acl);
4102 /****************************************************************************
4103 If the parent directory has no default ACL but it does have an Access ACL,
4104 inherit this Access ACL to file name.
4105 ****************************************************************************/
4107 int inherit_access_posix_acl(connection_struct *conn, const char *inherit_from_dir,
4108 const char *name, mode_t mode)
4110 if (directory_has_default_posix_acl(conn, inherit_from_dir))
4113 return copy_access_posix_acl(conn, inherit_from_dir, name, mode);
4116 /****************************************************************************
4117 Do an fchmod by setting the ACL USER_OBJ, GROUP_OBJ and OTHER bits in an ACL
4118 and set the mask to rwx. Needed to preserve complex ACLs set by NT.
4119 ****************************************************************************/
4121 int fchmod_acl(files_struct *fsp, mode_t mode)
4123 connection_struct *conn = fsp->conn;
4124 SMB_ACL_T posix_acl = NULL;
4127 if ((posix_acl = SMB_VFS_SYS_ACL_GET_FD(fsp)) == NULL)
4130 if ((ret = chmod_acl_internals(conn, posix_acl, mode)) == -1)
4133 ret = SMB_VFS_SYS_ACL_SET_FD(fsp, posix_acl);
4137 SMB_VFS_SYS_ACL_FREE_ACL(conn, posix_acl);
4141 /****************************************************************************
4142 Map from wire type to permset.
4143 ****************************************************************************/
4145 static bool unix_ex_wire_to_permset(connection_struct *conn, unsigned char wire_perm, SMB_ACL_PERMSET_T *p_permset)
4147 if (wire_perm & ~(SMB_POSIX_ACL_READ|SMB_POSIX_ACL_WRITE|SMB_POSIX_ACL_EXECUTE)) {
4151 if (SMB_VFS_SYS_ACL_CLEAR_PERMS(conn, *p_permset) == -1) {
4155 if (wire_perm & SMB_POSIX_ACL_READ) {
4156 if (SMB_VFS_SYS_ACL_ADD_PERM(conn, *p_permset, SMB_ACL_READ) == -1) {
4160 if (wire_perm & SMB_POSIX_ACL_WRITE) {
4161 if (SMB_VFS_SYS_ACL_ADD_PERM(conn, *p_permset, SMB_ACL_WRITE) == -1) {
4165 if (wire_perm & SMB_POSIX_ACL_EXECUTE) {
4166 if (SMB_VFS_SYS_ACL_ADD_PERM(conn, *p_permset, SMB_ACL_EXECUTE) == -1) {
4173 /****************************************************************************
4174 Map from wire type to tagtype.
4175 ****************************************************************************/
4177 static bool unix_ex_wire_to_tagtype(unsigned char wire_tt, SMB_ACL_TAG_T *p_tt)
4180 case SMB_POSIX_ACL_USER_OBJ:
4181 *p_tt = SMB_ACL_USER_OBJ;
4183 case SMB_POSIX_ACL_USER:
4184 *p_tt = SMB_ACL_USER;
4186 case SMB_POSIX_ACL_GROUP_OBJ:
4187 *p_tt = SMB_ACL_GROUP_OBJ;
4189 case SMB_POSIX_ACL_GROUP:
4190 *p_tt = SMB_ACL_GROUP;
4192 case SMB_POSIX_ACL_MASK:
4193 *p_tt = SMB_ACL_MASK;
4195 case SMB_POSIX_ACL_OTHER:
4196 *p_tt = SMB_ACL_OTHER;
4204 /****************************************************************************
4205 Create a new POSIX acl from wire permissions.
4206 FIXME ! How does the share mask/mode fit into this.... ?
4207 ****************************************************************************/
4209 static SMB_ACL_T create_posix_acl_from_wire(connection_struct *conn, uint16 num_acls, const char *pdata)
4212 SMB_ACL_T the_acl = SMB_VFS_SYS_ACL_INIT(conn, num_acls);
4214 if (the_acl == NULL) {
4218 for (i = 0; i < num_acls; i++) {
4219 SMB_ACL_ENTRY_T the_entry;
4220 SMB_ACL_PERMSET_T the_permset;
4221 SMB_ACL_TAG_T tag_type;
4223 if (SMB_VFS_SYS_ACL_CREATE_ENTRY(conn, &the_acl, &the_entry) == -1) {
4224 DEBUG(0,("create_posix_acl_from_wire: Failed to create entry %u. (%s)\n",
4225 i, strerror(errno) ));
4229 if (!unix_ex_wire_to_tagtype(CVAL(pdata,(i*SMB_POSIX_ACL_ENTRY_SIZE)), &tag_type)) {
4230 DEBUG(0,("create_posix_acl_from_wire: invalid wire tagtype %u on entry %u.\n",
4231 CVAL(pdata,(i*SMB_POSIX_ACL_ENTRY_SIZE)), i ));
4235 if (SMB_VFS_SYS_ACL_SET_TAG_TYPE(conn, the_entry, tag_type) == -1) {
4236 DEBUG(0,("create_posix_acl_from_wire: Failed to set tagtype on entry %u. (%s)\n",
4237 i, strerror(errno) ));
4241 /* Get the permset pointer from the new ACL entry. */
4242 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, the_entry, &the_permset) == -1) {
4243 DEBUG(0,("create_posix_acl_from_wire: Failed to get permset on entry %u. (%s)\n",
4244 i, strerror(errno) ));
4248 /* Map from wire to permissions. */
4249 if (!unix_ex_wire_to_permset(conn, CVAL(pdata,(i*SMB_POSIX_ACL_ENTRY_SIZE)+1), &the_permset)) {
4250 DEBUG(0,("create_posix_acl_from_wire: invalid permset %u on entry %u.\n",
4251 CVAL(pdata,(i*SMB_POSIX_ACL_ENTRY_SIZE) + 1), i ));
4255 /* Now apply to the new ACL entry. */
4256 if (SMB_VFS_SYS_ACL_SET_PERMSET(conn, the_entry, the_permset) == -1) {
4257 DEBUG(0,("create_posix_acl_from_wire: Failed to add permset on entry %u. (%s)\n",
4258 i, strerror(errno) ));
4262 if (tag_type == SMB_ACL_USER) {
4263 uint32 uidval = IVAL(pdata,(i*SMB_POSIX_ACL_ENTRY_SIZE)+2);
4264 uid_t uid = (uid_t)uidval;
4265 if (SMB_VFS_SYS_ACL_SET_QUALIFIER(conn, the_entry,(void *)&uid) == -1) {
4266 DEBUG(0,("create_posix_acl_from_wire: Failed to set uid %u on entry %u. (%s)\n",
4267 (unsigned int)uid, i, strerror(errno) ));
4272 if (tag_type == SMB_ACL_GROUP) {
4273 uint32 gidval = IVAL(pdata,(i*SMB_POSIX_ACL_ENTRY_SIZE)+2);
4274 gid_t gid = (uid_t)gidval;
4275 if (SMB_VFS_SYS_ACL_SET_QUALIFIER(conn, the_entry,(void *)&gid) == -1) {
4276 DEBUG(0,("create_posix_acl_from_wire: Failed to set gid %u on entry %u. (%s)\n",
4277 (unsigned int)gid, i, strerror(errno) ));
4287 if (the_acl != NULL) {
4288 SMB_VFS_SYS_ACL_FREE_ACL(conn, the_acl);
4293 /****************************************************************************
4294 Calls from UNIX extensions - Default POSIX ACL set.
4295 If num_def_acls == 0 and not a directory just return. If it is a directory
4296 and num_def_acls == 0 then remove the default acl. Else set the default acl
4298 ****************************************************************************/
4300 bool set_unix_posix_default_acl(connection_struct *conn, const char *fname, SMB_STRUCT_STAT *psbuf,
4301 uint16 num_def_acls, const char *pdata)
4303 SMB_ACL_T def_acl = NULL;
4305 if (!S_ISDIR(psbuf->st_ex_mode)) {
4307 DEBUG(5,("set_unix_posix_default_acl: Can't set default ACL on non-directory file %s\n", fname ));
4315 if (!num_def_acls) {
4316 /* Remove the default ACL. */
4317 if (SMB_VFS_SYS_ACL_DELETE_DEF_FILE(conn, fname) == -1) {
4318 DEBUG(5,("set_unix_posix_default_acl: acl_delete_def_file failed on directory %s (%s)\n",
4319 fname, strerror(errno) ));
4325 if ((def_acl = create_posix_acl_from_wire(conn, num_def_acls, pdata)) == NULL) {
4329 if (SMB_VFS_SYS_ACL_SET_FILE(conn, fname, SMB_ACL_TYPE_DEFAULT, def_acl) == -1) {
4330 DEBUG(5,("set_unix_posix_default_acl: acl_set_file failed on directory %s (%s)\n",
4331 fname, strerror(errno) ));
4332 SMB_VFS_SYS_ACL_FREE_ACL(conn, def_acl);
4336 DEBUG(10,("set_unix_posix_default_acl: set default acl for file %s\n", fname ));
4337 SMB_VFS_SYS_ACL_FREE_ACL(conn, def_acl);
4341 /****************************************************************************
4342 Remove an ACL from a file. As we don't have acl_delete_entry() available
4343 we must read the current acl and copy all entries except MASK, USER and GROUP
4344 to a new acl, then set that. This (at least on Linux) causes any ACL to be
4346 FIXME ! How does the share mask/mode fit into this.... ?
4347 ****************************************************************************/
4349 static bool remove_posix_acl(connection_struct *conn, files_struct *fsp, const char *fname)
4351 SMB_ACL_T file_acl = NULL;
4352 int entry_id = SMB_ACL_FIRST_ENTRY;
4353 SMB_ACL_ENTRY_T entry;
4355 /* Create a new ACL with only 3 entries, u/g/w. */
4356 SMB_ACL_T new_file_acl = SMB_VFS_SYS_ACL_INIT(conn, 3);
4357 SMB_ACL_ENTRY_T user_ent = NULL;
4358 SMB_ACL_ENTRY_T group_ent = NULL;
4359 SMB_ACL_ENTRY_T other_ent = NULL;
4361 if (new_file_acl == NULL) {
4362 DEBUG(5,("remove_posix_acl: failed to init new ACL with 3 entries for file %s.\n", fname));
4366 /* Now create the u/g/w entries. */
4367 if (SMB_VFS_SYS_ACL_CREATE_ENTRY(conn, &new_file_acl, &user_ent) == -1) {
4368 DEBUG(5,("remove_posix_acl: Failed to create user entry for file %s. (%s)\n",
4369 fname, strerror(errno) ));
4372 if (SMB_VFS_SYS_ACL_SET_TAG_TYPE(conn, user_ent, SMB_ACL_USER_OBJ) == -1) {
4373 DEBUG(5,("remove_posix_acl: Failed to set user entry for file %s. (%s)\n",
4374 fname, strerror(errno) ));
4378 if (SMB_VFS_SYS_ACL_CREATE_ENTRY(conn, &new_file_acl, &group_ent) == -1) {
4379 DEBUG(5,("remove_posix_acl: Failed to create group entry for file %s. (%s)\n",
4380 fname, strerror(errno) ));
4383 if (SMB_VFS_SYS_ACL_SET_TAG_TYPE(conn, group_ent, SMB_ACL_GROUP_OBJ) == -1) {
4384 DEBUG(5,("remove_posix_acl: Failed to set group entry for file %s. (%s)\n",
4385 fname, strerror(errno) ));
4389 if (SMB_VFS_SYS_ACL_CREATE_ENTRY(conn, &new_file_acl, &other_ent) == -1) {
4390 DEBUG(5,("remove_posix_acl: Failed to create other entry for file %s. (%s)\n",
4391 fname, strerror(errno) ));
4394 if (SMB_VFS_SYS_ACL_SET_TAG_TYPE(conn, other_ent, SMB_ACL_OTHER) == -1) {
4395 DEBUG(5,("remove_posix_acl: Failed to set other entry for file %s. (%s)\n",
4396 fname, strerror(errno) ));
4400 /* Get the current file ACL. */
4401 if (fsp && fsp->fh->fd != -1) {
4402 file_acl = SMB_VFS_SYS_ACL_GET_FD(fsp);
4404 file_acl = SMB_VFS_SYS_ACL_GET_FILE( conn, fname, SMB_ACL_TYPE_ACCESS);
4407 if (file_acl == NULL) {
4408 /* This is only returned if an error occurred. Even for a file with
4409 no acl a u/g/w acl should be returned. */
4410 DEBUG(5,("remove_posix_acl: failed to get ACL from file %s (%s).\n",
4411 fname, strerror(errno) ));
4415 while ( SMB_VFS_SYS_ACL_GET_ENTRY(conn, file_acl, entry_id, &entry) == 1) {
4416 SMB_ACL_TAG_T tagtype;
4417 SMB_ACL_PERMSET_T permset;
4419 entry_id = SMB_ACL_NEXT_ENTRY;
4421 if (SMB_VFS_SYS_ACL_GET_TAG_TYPE(conn, entry, &tagtype) == -1) {
4422 DEBUG(5,("remove_posix_acl: failed to get tagtype from ACL on file %s (%s).\n",
4423 fname, strerror(errno) ));
4427 if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, entry, &permset) == -1) {
4428 DEBUG(5,("remove_posix_acl: failed to get permset from ACL on file %s (%s).\n",
4429 fname, strerror(errno) ));
4433 if (tagtype == SMB_ACL_USER_OBJ) {
4434 if (SMB_VFS_SYS_ACL_SET_PERMSET(conn, user_ent, permset) == -1) {
4435 DEBUG(5,("remove_posix_acl: failed to set permset from ACL on file %s (%s).\n",
4436 fname, strerror(errno) ));
4438 } else if (tagtype == SMB_ACL_GROUP_OBJ) {
4439 if (SMB_VFS_SYS_ACL_SET_PERMSET(conn, group_ent, permset) == -1) {
4440 DEBUG(5,("remove_posix_acl: failed to set permset from ACL on file %s (%s).\n",
4441 fname, strerror(errno) ));
4443 } else if (tagtype == SMB_ACL_OTHER) {
4444 if (SMB_VFS_SYS_ACL_SET_PERMSET(conn, other_ent, permset) == -1) {
4445 DEBUG(5,("remove_posix_acl: failed to set permset from ACL on file %s (%s).\n",
4446 fname, strerror(errno) ));
4451 /* Set the new empty file ACL. */
4452 if (fsp && fsp->fh->fd != -1) {
4453 if (SMB_VFS_SYS_ACL_SET_FD(fsp, new_file_acl) == -1) {
4454 DEBUG(5,("remove_posix_acl: acl_set_file failed on %s (%s)\n",
4455 fname, strerror(errno) ));
4459 if (SMB_VFS_SYS_ACL_SET_FILE(conn, fname, SMB_ACL_TYPE_ACCESS, new_file_acl) == -1) {
4460 DEBUG(5,("remove_posix_acl: acl_set_file failed on %s (%s)\n",
4461 fname, strerror(errno) ));
4471 SMB_VFS_SYS_ACL_FREE_ACL(conn, file_acl);
4474 SMB_VFS_SYS_ACL_FREE_ACL(conn, new_file_acl);
4479 /****************************************************************************
4480 Calls from UNIX extensions - POSIX ACL set.
4481 If num_def_acls == 0 then read/modify/write acl after removing all entries
4482 except SMB_ACL_USER_OBJ, SMB_ACL_GROUP_OBJ, SMB_ACL_OTHER.
4483 ****************************************************************************/
4485 bool set_unix_posix_acl(connection_struct *conn, files_struct *fsp, const char *fname, uint16 num_acls, const char *pdata)
4487 SMB_ACL_T file_acl = NULL;
4490 /* Remove the ACL from the file. */
4491 return remove_posix_acl(conn, fsp, fname);
4494 if ((file_acl = create_posix_acl_from_wire(conn, num_acls, pdata)) == NULL) {
4498 if (fsp && fsp->fh->fd != -1) {
4499 /* The preferred way - use an open fd. */
4500 if (SMB_VFS_SYS_ACL_SET_FD(fsp, file_acl) == -1) {
4501 DEBUG(5,("set_unix_posix_acl: acl_set_file failed on %s (%s)\n",
4502 fname, strerror(errno) ));
4503 SMB_VFS_SYS_ACL_FREE_ACL(conn, file_acl);
4507 if (SMB_VFS_SYS_ACL_SET_FILE(conn, fname, SMB_ACL_TYPE_ACCESS, file_acl) == -1) {
4508 DEBUG(5,("set_unix_posix_acl: acl_set_file failed on %s (%s)\n",
4509 fname, strerror(errno) ));
4510 SMB_VFS_SYS_ACL_FREE_ACL(conn, file_acl);
4515 DEBUG(10,("set_unix_posix_acl: set acl for file %s\n", fname ));
4516 SMB_VFS_SYS_ACL_FREE_ACL(conn, file_acl);
4520 /********************************************************************
4521 Pull the NT ACL from a file on disk or the OpenEventlog() access
4522 check. Caller is responsible for freeing the returned security
4523 descriptor via TALLOC_FREE(). This is designed for dealing with
4524 user space access checks in smbd outside of the VFS. For example,
4525 checking access rights in OpenEventlog().
4527 Assume we are dealing with files (for now)
4528 ********************************************************************/
4530 SEC_DESC *get_nt_acl_no_snum( TALLOC_CTX *ctx, const char *fname)
4532 SEC_DESC *psd, *ret_sd;
4533 connection_struct *conn;
4535 struct fd_handle fh;
4537 conn = TALLOC_ZERO_P(ctx, connection_struct);
4539 DEBUG(0, ("talloc failed\n"));
4543 if (!(conn->params = TALLOC_P(conn, struct share_params))) {
4544 DEBUG(0,("get_nt_acl_no_snum: talloc() failed!\n"));
4549 conn->params->service = -1;
4551 set_conn_connectpath(conn, "/");
4553 if (!smbd_vfs_init(conn)) {
4554 DEBUG(0,("get_nt_acl_no_snum: Unable to create a fake connection struct!\n"));
4555 conn_free_internal( conn );
4559 ZERO_STRUCT( finfo );
4566 finfo.fsp_name = CONST_DISCARD(char *,fname);
4568 if (!NT_STATUS_IS_OK(SMB_VFS_FGET_NT_ACL( &finfo, DACL_SECURITY_INFORMATION, &psd))) {
4569 DEBUG(0,("get_nt_acl_no_snum: get_nt_acl returned zero.\n"));
4570 conn_free_internal( conn );
4574 ret_sd = dup_sec_desc( ctx, psd );
4576 conn_free_internal( conn );