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/>.
23 #include "smbd/smbd.h"
24 #include "system/filesys.h"
25 #include "../libcli/security/security.h"
27 #include "passdb/lookup_sid.h"
29 #include "../librpc/gen_ndr/idmap.h"
30 #include "../librpc/gen_ndr/ndr_smb_acl.h"
31 #include "lib/param/loadparm.h"
33 extern const struct generic_mapping file_generic_mapping;
36 #define DBGC_CLASS DBGC_ACLS
38 /****************************************************************************
39 Data structures representing the internal ACE format.
40 ****************************************************************************/
42 enum ace_owner {UID_ACE, GID_ACE, WORLD_ACE};
43 enum ace_attribute {ALLOW_ACE, DENY_ACE}; /* Used for incoming NT ACLS. */
45 typedef struct canon_ace {
46 struct canon_ace *next, *prev;
48 mode_t perms; /* Only use S_I(R|W|X)USR mode bits here. */
49 struct dom_sid trustee;
50 enum ace_owner owner_type;
51 enum ace_attribute attr;
52 struct unixid unix_ug;
53 uint8_t ace_flags; /* From windows ACE entry. */
56 #define ALL_ACE_PERMS (S_IRUSR|S_IWUSR|S_IXUSR)
59 * EA format of user.SAMBA_PAI (Samba_Posix_Acl_Interitance)
60 * attribute on disk - version 1.
61 * All values are little endian.
63 * | 1 | 1 | 2 | 2 | ....
64 * +------+------+-------------+---------------------+-------------+--------------------+
65 * | vers | flag | num_entries | num_default_entries | ..entries.. | default_entries... |
66 * +------+------+-------------+---------------------+-------------+--------------------+
71 * +------+-------------------+
72 * | value| uid/gid or world |
74 * +------+-------------------+
76 * Version 2 format. Stores extra Windows metadata about an ACL.
78 * | 1 | 2 | 2 | 2 | ....
79 * +------+----------+-------------+---------------------+-------------+--------------------+
80 * | vers | ace | num_entries | num_default_entries | ..entries.. | default_entries... |
81 * | 2 | type | | | | |
82 * +------+----------+-------------+---------------------+-------------+--------------------+
87 * +------+------+-------------------+
88 * | ace | value| uid/gid or world |
89 * | flag | type | value |
90 * +------+-------------------+------+
94 #define PAI_VERSION_OFFSET 0
96 #define PAI_V1_FLAG_OFFSET 1
97 #define PAI_V1_NUM_ENTRIES_OFFSET 2
98 #define PAI_V1_NUM_DEFAULT_ENTRIES_OFFSET 4
99 #define PAI_V1_ENTRIES_BASE 6
100 #define PAI_V1_ACL_FLAG_PROTECTED 0x1
101 #define PAI_V1_ENTRY_LENGTH 5
103 #define PAI_V1_VERSION 1
105 #define PAI_V2_TYPE_OFFSET 1
106 #define PAI_V2_NUM_ENTRIES_OFFSET 3
107 #define PAI_V2_NUM_DEFAULT_ENTRIES_OFFSET 5
108 #define PAI_V2_ENTRIES_BASE 7
109 #define PAI_V2_ENTRY_LENGTH 6
111 #define PAI_V2_VERSION 2
114 * In memory format of user.SAMBA_PAI attribute.
118 struct pai_entry *next, *prev;
120 enum ace_owner owner_type;
121 struct unixid unix_ug;
126 unsigned int num_entries;
127 struct pai_entry *entry_list;
128 unsigned int num_def_entries;
129 struct pai_entry *def_entry_list;
132 /************************************************************************
133 Return a uint32_t of the pai_entry principal.
134 ************************************************************************/
136 static uint32_t get_pai_entry_val(struct pai_entry *paie)
138 switch (paie->owner_type) {
140 DEBUG(10,("get_pai_entry_val: uid = %u\n", (unsigned int)paie->unix_ug.id ));
141 return (uint32_t)paie->unix_ug.id;
143 DEBUG(10,("get_pai_entry_val: gid = %u\n", (unsigned int)paie->unix_ug.id ));
144 return (uint32_t)paie->unix_ug.id;
147 DEBUG(10,("get_pai_entry_val: world ace\n"));
152 /************************************************************************
153 Return a uint32_t of the entry principal.
154 ************************************************************************/
156 static uint32_t get_entry_val(canon_ace *ace_entry)
158 switch (ace_entry->owner_type) {
160 DEBUG(10,("get_entry_val: uid = %u\n", (unsigned int)ace_entry->unix_ug.id ));
161 return (uint32_t)ace_entry->unix_ug.id;
163 DEBUG(10,("get_entry_val: gid = %u\n", (unsigned int)ace_entry->unix_ug.id ));
164 return (uint32_t)ace_entry->unix_ug.id;
167 DEBUG(10,("get_entry_val: world ace\n"));
172 /************************************************************************
173 Create the on-disk format (always v2 now). Caller must free.
174 ************************************************************************/
176 static char *create_pai_buf_v2(canon_ace *file_ace_list,
177 canon_ace *dir_ace_list,
181 char *pai_buf = NULL;
182 canon_ace *ace_list = NULL;
183 char *entry_offset = NULL;
184 unsigned int num_entries = 0;
185 unsigned int num_def_entries = 0;
188 for (ace_list = file_ace_list; ace_list; ace_list = ace_list->next) {
192 for (ace_list = dir_ace_list; ace_list; ace_list = ace_list->next) {
196 DEBUG(10,("create_pai_buf_v2: num_entries = %u, num_def_entries = %u\n", num_entries, num_def_entries ));
198 *store_size = PAI_V2_ENTRIES_BASE +
199 ((num_entries + num_def_entries)*PAI_V2_ENTRY_LENGTH);
201 pai_buf = talloc_array(talloc_tos(), char, *store_size);
206 /* Set up the header. */
207 memset(pai_buf, '\0', PAI_V2_ENTRIES_BASE);
208 SCVAL(pai_buf,PAI_VERSION_OFFSET,PAI_V2_VERSION);
209 SSVAL(pai_buf,PAI_V2_TYPE_OFFSET, sd_type);
210 SSVAL(pai_buf,PAI_V2_NUM_ENTRIES_OFFSET,num_entries);
211 SSVAL(pai_buf,PAI_V2_NUM_DEFAULT_ENTRIES_OFFSET,num_def_entries);
213 DEBUG(10,("create_pai_buf_v2: sd_type = 0x%x\n",
214 (unsigned int)sd_type ));
216 entry_offset = pai_buf + PAI_V2_ENTRIES_BASE;
219 for (ace_list = file_ace_list; ace_list; ace_list = ace_list->next) {
220 uint8_t type_val = (uint8_t)ace_list->owner_type;
221 uint32_t entry_val = get_entry_val(ace_list);
223 SCVAL(entry_offset,0,ace_list->ace_flags);
224 SCVAL(entry_offset,1,type_val);
225 SIVAL(entry_offset,2,entry_val);
226 DEBUG(10,("create_pai_buf_v2: entry %u [0x%x] [0x%x] [0x%x]\n",
228 (unsigned int)ace_list->ace_flags,
229 (unsigned int)type_val,
230 (unsigned int)entry_val ));
232 entry_offset += PAI_V2_ENTRY_LENGTH;
235 for (ace_list = dir_ace_list; ace_list; ace_list = ace_list->next) {
236 uint8_t type_val = (uint8_t)ace_list->owner_type;
237 uint32_t entry_val = get_entry_val(ace_list);
239 SCVAL(entry_offset,0,ace_list->ace_flags);
240 SCVAL(entry_offset,1,type_val);
241 SIVAL(entry_offset,2,entry_val);
242 DEBUG(10,("create_pai_buf_v2: entry %u [0x%x] [0x%x] [0x%x]\n",
244 (unsigned int)ace_list->ace_flags,
245 (unsigned int)type_val,
246 (unsigned int)entry_val ));
248 entry_offset += PAI_V2_ENTRY_LENGTH;
254 /************************************************************************
255 Store the user.SAMBA_PAI attribute on disk.
256 ************************************************************************/
258 static void store_inheritance_attributes(files_struct *fsp,
259 canon_ace *file_ace_list,
260 canon_ace *dir_ace_list,
267 if (!lp_map_acl_inherit(SNUM(fsp->conn))) {
271 pai_buf = create_pai_buf_v2(file_ace_list, dir_ace_list,
272 sd_type, &store_size);
274 if (fsp->fh->fd != -1) {
275 ret = SMB_VFS_FSETXATTR(fsp, SAMBA_POSIX_INHERITANCE_EA_NAME,
276 pai_buf, store_size, 0);
278 ret = SMB_VFS_SETXATTR(fsp->conn, fsp->fsp_name,
279 SAMBA_POSIX_INHERITANCE_EA_NAME,
280 pai_buf, store_size, 0);
283 TALLOC_FREE(pai_buf);
285 DEBUG(10,("store_inheritance_attribute: type 0x%x for file %s\n",
286 (unsigned int)sd_type,
289 if (ret == -1 && !no_acl_syscall_error(errno)) {
290 DEBUG(1,("store_inheritance_attribute: Error %s\n", strerror(errno) ));
294 /************************************************************************
295 Delete the in memory inheritance info.
296 ************************************************************************/
298 static void free_inherited_info(struct pai_val *pal)
301 struct pai_entry *paie, *paie_next;
302 for (paie = pal->entry_list; paie; paie = paie_next) {
303 paie_next = paie->next;
306 for (paie = pal->def_entry_list; paie; paie = paie_next) {
307 paie_next = paie->next;
314 /************************************************************************
315 Get any stored ACE flags.
316 ************************************************************************/
318 static uint16_t get_pai_flags(struct pai_val *pal, canon_ace *ace_entry, bool default_ace)
320 struct pai_entry *paie;
326 /* If the entry exists it is inherited. */
327 for (paie = (default_ace ? pal->def_entry_list : pal->entry_list); paie; paie = paie->next) {
328 if (ace_entry->owner_type == paie->owner_type &&
329 get_entry_val(ace_entry) == get_pai_entry_val(paie))
330 return paie->ace_flags;
335 /************************************************************************
336 Ensure an attribute just read is valid - v1.
337 ************************************************************************/
339 static bool check_pai_ok_v1(const char *pai_buf, size_t pai_buf_data_size)
341 uint16_t num_entries;
342 uint16_t num_def_entries;
344 if (pai_buf_data_size < PAI_V1_ENTRIES_BASE) {
345 /* Corrupted - too small. */
349 if (CVAL(pai_buf,PAI_VERSION_OFFSET) != PAI_V1_VERSION) {
353 num_entries = SVAL(pai_buf,PAI_V1_NUM_ENTRIES_OFFSET);
354 num_def_entries = SVAL(pai_buf,PAI_V1_NUM_DEFAULT_ENTRIES_OFFSET);
356 /* Check the entry lists match. */
357 /* Each entry is 5 bytes (type plus 4 bytes of uid or gid). */
359 if (((num_entries + num_def_entries)*PAI_V1_ENTRY_LENGTH) +
360 PAI_V1_ENTRIES_BASE != pai_buf_data_size) {
367 /************************************************************************
368 Ensure an attribute just read is valid - v2.
369 ************************************************************************/
371 static bool check_pai_ok_v2(const char *pai_buf, size_t pai_buf_data_size)
373 uint16_t num_entries;
374 uint16_t num_def_entries;
376 if (pai_buf_data_size < PAI_V2_ENTRIES_BASE) {
377 /* Corrupted - too small. */
381 if (CVAL(pai_buf,PAI_VERSION_OFFSET) != PAI_V2_VERSION) {
385 num_entries = SVAL(pai_buf,PAI_V2_NUM_ENTRIES_OFFSET);
386 num_def_entries = SVAL(pai_buf,PAI_V2_NUM_DEFAULT_ENTRIES_OFFSET);
388 /* Check the entry lists match. */
389 /* Each entry is 6 bytes (flags + type + 4 bytes of uid or gid). */
391 if (((num_entries + num_def_entries)*PAI_V2_ENTRY_LENGTH) +
392 PAI_V2_ENTRIES_BASE != pai_buf_data_size) {
399 /************************************************************************
401 ************************************************************************/
403 static bool get_pai_owner_type(struct pai_entry *paie, const char *entry_offset)
405 paie->owner_type = (enum ace_owner)CVAL(entry_offset,0);
406 switch( paie->owner_type) {
408 paie->unix_ug.type = ID_TYPE_UID;
409 paie->unix_ug.id = (uid_t)IVAL(entry_offset,1);
410 DEBUG(10,("get_pai_owner_type: uid = %u\n",
411 (unsigned int)paie->unix_ug.id ));
414 paie->unix_ug.type = ID_TYPE_GID;
415 paie->unix_ug.id = (gid_t)IVAL(entry_offset,1);
416 DEBUG(10,("get_pai_owner_type: gid = %u\n",
417 (unsigned int)paie->unix_ug.id ));
420 paie->unix_ug.type = ID_TYPE_NOT_SPECIFIED;
421 paie->unix_ug.id = -1;
422 DEBUG(10,("get_pai_owner_type: world ace\n"));
425 DEBUG(10,("get_pai_owner_type: unknown type %u\n",
426 (unsigned int)paie->owner_type ));
432 /************************************************************************
434 ************************************************************************/
436 static const char *create_pai_v1_entries(struct pai_val *paiv,
437 const char *entry_offset,
442 for (i = 0; i < paiv->num_entries; i++) {
443 struct pai_entry *paie = talloc(talloc_tos(), struct pai_entry);
448 paie->ace_flags = SEC_ACE_FLAG_INHERITED_ACE;
449 if (!get_pai_owner_type(paie, entry_offset)) {
455 DLIST_ADD(paiv->entry_list, paie);
457 DLIST_ADD(paiv->def_entry_list, paie);
459 entry_offset += PAI_V1_ENTRY_LENGTH;
464 /************************************************************************
465 Convert to in-memory format from version 1.
466 ************************************************************************/
468 static struct pai_val *create_pai_val_v1(const char *buf, size_t size)
470 const char *entry_offset;
471 struct pai_val *paiv = NULL;
473 if (!check_pai_ok_v1(buf, size)) {
477 paiv = talloc(talloc_tos(), struct pai_val);
482 memset(paiv, '\0', sizeof(struct pai_val));
484 paiv->sd_type = (CVAL(buf,PAI_V1_FLAG_OFFSET) == PAI_V1_ACL_FLAG_PROTECTED) ?
485 SEC_DESC_DACL_PROTECTED : 0;
487 paiv->num_entries = SVAL(buf,PAI_V1_NUM_ENTRIES_OFFSET);
488 paiv->num_def_entries = SVAL(buf,PAI_V1_NUM_DEFAULT_ENTRIES_OFFSET);
490 entry_offset = buf + PAI_V1_ENTRIES_BASE;
492 DEBUG(10,("create_pai_val: num_entries = %u, num_def_entries = %u\n",
493 paiv->num_entries, paiv->num_def_entries ));
495 entry_offset = create_pai_v1_entries(paiv, entry_offset, false);
496 if (entry_offset == NULL) {
497 free_inherited_info(paiv);
500 entry_offset = create_pai_v1_entries(paiv, entry_offset, true);
501 if (entry_offset == NULL) {
502 free_inherited_info(paiv);
509 /************************************************************************
511 ************************************************************************/
513 static const char *create_pai_v2_entries(struct pai_val *paiv,
514 unsigned int num_entries,
515 const char *entry_offset,
520 for (i = 0; i < num_entries; i++) {
521 struct pai_entry *paie = talloc(talloc_tos(), struct pai_entry);
526 paie->ace_flags = CVAL(entry_offset,0);
528 if (!get_pai_owner_type(paie, entry_offset+1)) {
533 DLIST_ADD(paiv->entry_list, paie);
535 DLIST_ADD(paiv->def_entry_list, paie);
537 entry_offset += PAI_V2_ENTRY_LENGTH;
542 /************************************************************************
543 Convert to in-memory format from version 2.
544 ************************************************************************/
546 static struct pai_val *create_pai_val_v2(const char *buf, size_t size)
548 const char *entry_offset;
549 struct pai_val *paiv = NULL;
551 if (!check_pai_ok_v2(buf, size)) {
555 paiv = talloc(talloc_tos(), struct pai_val);
560 memset(paiv, '\0', sizeof(struct pai_val));
562 paiv->sd_type = SVAL(buf,PAI_V2_TYPE_OFFSET);
564 paiv->num_entries = SVAL(buf,PAI_V2_NUM_ENTRIES_OFFSET);
565 paiv->num_def_entries = SVAL(buf,PAI_V2_NUM_DEFAULT_ENTRIES_OFFSET);
567 entry_offset = buf + PAI_V2_ENTRIES_BASE;
569 DEBUG(10,("create_pai_val_v2: sd_type = 0x%x num_entries = %u, num_def_entries = %u\n",
570 (unsigned int)paiv->sd_type,
571 paiv->num_entries, paiv->num_def_entries ));
573 entry_offset = create_pai_v2_entries(paiv, paiv->num_entries,
574 entry_offset, false);
575 if (entry_offset == NULL) {
576 free_inherited_info(paiv);
579 entry_offset = create_pai_v2_entries(paiv, paiv->num_def_entries,
581 if (entry_offset == NULL) {
582 free_inherited_info(paiv);
589 /************************************************************************
590 Convert to in-memory format - from either version 1 or 2.
591 ************************************************************************/
593 static struct pai_val *create_pai_val(const char *buf, size_t size)
598 if (CVAL(buf,PAI_VERSION_OFFSET) == PAI_V1_VERSION) {
599 return create_pai_val_v1(buf, size);
600 } else if (CVAL(buf,PAI_VERSION_OFFSET) == PAI_V2_VERSION) {
601 return create_pai_val_v2(buf, size);
607 /************************************************************************
608 Load the user.SAMBA_PAI attribute.
609 ************************************************************************/
611 static struct pai_val *fload_inherited_info(files_struct *fsp)
614 size_t pai_buf_size = 1024;
615 struct pai_val *paiv = NULL;
618 if (!lp_map_acl_inherit(SNUM(fsp->conn))) {
622 if ((pai_buf = talloc_array(talloc_tos(), char, pai_buf_size)) == NULL) {
627 if (fsp->fh->fd != -1) {
628 ret = SMB_VFS_FGETXATTR(fsp, SAMBA_POSIX_INHERITANCE_EA_NAME,
629 pai_buf, pai_buf_size);
631 ret = SMB_VFS_GETXATTR(fsp->conn,
633 SAMBA_POSIX_INHERITANCE_EA_NAME,
634 pai_buf, pai_buf_size);
638 if (errno != ERANGE) {
641 /* Buffer too small - enlarge it. */
643 TALLOC_FREE(pai_buf);
644 if (pai_buf_size > 1024*1024) {
645 return NULL; /* Limit malloc to 1mb. */
647 if ((pai_buf = talloc_array(talloc_tos(), char, pai_buf_size)) == NULL)
652 DEBUG(10,("load_inherited_info: ret = %lu for file %s\n",
653 (unsigned long)ret, fsp_str_dbg(fsp)));
656 /* No attribute or not supported. */
658 if (errno != ENOATTR)
659 DEBUG(10,("load_inherited_info: Error %s\n", strerror(errno) ));
662 DEBUG(10,("load_inherited_info: Error %s\n", strerror(errno) ));
664 TALLOC_FREE(pai_buf);
668 paiv = create_pai_val(pai_buf, ret);
671 DEBUG(10,("load_inherited_info: ACL type is 0x%x for file %s\n",
672 (unsigned int)paiv->sd_type, fsp_str_dbg(fsp)));
675 TALLOC_FREE(pai_buf);
679 /************************************************************************
680 Load the user.SAMBA_PAI attribute.
681 ************************************************************************/
683 static struct pai_val *load_inherited_info(const struct connection_struct *conn,
684 const struct smb_filename *smb_fname)
687 size_t pai_buf_size = 1024;
688 struct pai_val *paiv = NULL;
691 if (!lp_map_acl_inherit(SNUM(conn))) {
695 if ((pai_buf = talloc_array(talloc_tos(), char, pai_buf_size)) == NULL) {
700 ret = SMB_VFS_GETXATTR(conn, smb_fname,
701 SAMBA_POSIX_INHERITANCE_EA_NAME,
702 pai_buf, pai_buf_size);
705 if (errno != ERANGE) {
708 /* Buffer too small - enlarge it. */
710 TALLOC_FREE(pai_buf);
711 if (pai_buf_size > 1024*1024) {
712 return NULL; /* Limit malloc to 1mb. */
714 if ((pai_buf = talloc_array(talloc_tos(), char, pai_buf_size)) == NULL)
719 DEBUG(10,("load_inherited_info: ret = %lu for file %s\n",
720 (unsigned long)ret, smb_fname->base_name));
723 /* No attribute or not supported. */
725 if (errno != ENOATTR)
726 DEBUG(10,("load_inherited_info: Error %s\n", strerror(errno) ));
729 DEBUG(10,("load_inherited_info: Error %s\n", strerror(errno) ));
731 TALLOC_FREE(pai_buf);
735 paiv = create_pai_val(pai_buf, ret);
738 DEBUG(10,("load_inherited_info: ACL type 0x%x for file %s\n",
739 (unsigned int)paiv->sd_type,
740 smb_fname->base_name));
743 TALLOC_FREE(pai_buf);
747 /****************************************************************************
748 Functions to manipulate the internal ACE format.
749 ****************************************************************************/
751 /****************************************************************************
752 Count a linked list of canonical ACE entries.
753 ****************************************************************************/
755 static size_t count_canon_ace_list( canon_ace *l_head )
760 for (ace = l_head; ace; ace = ace->next)
766 /****************************************************************************
767 Free a linked list of canonical ACE entries.
768 ****************************************************************************/
770 static void free_canon_ace_list( canon_ace *l_head )
772 canon_ace *list, *next;
774 for (list = l_head; list; list = next) {
776 DLIST_REMOVE(l_head, list);
781 /****************************************************************************
782 Function to duplicate a canon_ace entry.
783 ****************************************************************************/
785 static canon_ace *dup_canon_ace( canon_ace *src_ace)
787 canon_ace *dst_ace = talloc(talloc_tos(), canon_ace);
793 dst_ace->prev = dst_ace->next = NULL;
797 /****************************************************************************
798 Print out a canon ace.
799 ****************************************************************************/
801 static void print_canon_ace(canon_ace *pace, int num)
803 struct dom_sid_buf buf;
804 dbgtext( "canon_ace index %d. Type = %s ", num, pace->attr == ALLOW_ACE ? "allow" : "deny" );
805 dbgtext( "SID = %s ", dom_sid_str_buf(&pace->trustee, &buf));
806 if (pace->owner_type == UID_ACE) {
807 dbgtext( "uid %u ", (unsigned int)pace->unix_ug.id);
808 } else if (pace->owner_type == GID_ACE) {
809 dbgtext( "gid %u ", (unsigned int)pace->unix_ug.id);
812 switch (pace->type) {
814 dbgtext( "SMB_ACL_USER ");
816 case SMB_ACL_USER_OBJ:
817 dbgtext( "SMB_ACL_USER_OBJ ");
820 dbgtext( "SMB_ACL_GROUP ");
822 case SMB_ACL_GROUP_OBJ:
823 dbgtext( "SMB_ACL_GROUP_OBJ ");
826 dbgtext( "SMB_ACL_OTHER ");
833 dbgtext( "ace_flags = 0x%x ", (unsigned int)pace->ace_flags);
835 dbgtext( "%c", pace->perms & S_IRUSR ? 'r' : '-');
836 dbgtext( "%c", pace->perms & S_IWUSR ? 'w' : '-');
837 dbgtext( "%c\n", pace->perms & S_IXUSR ? 'x' : '-');
840 /****************************************************************************
841 Print out a canon ace list.
842 ****************************************************************************/
844 static void print_canon_ace_list(const char *name, canon_ace *ace_list)
848 if( DEBUGLVL( 10 )) {
849 dbgtext( "print_canon_ace_list: %s\n", name );
850 for (;ace_list; ace_list = ace_list->next, count++)
851 print_canon_ace(ace_list, count );
855 /****************************************************************************
856 Map POSIX ACL perms to canon_ace permissions (a mode_t containing only S_(R|W|X)USR bits).
857 ****************************************************************************/
859 static mode_t convert_permset_to_mode_t(SMB_ACL_PERMSET_T permset)
863 ret |= (sys_acl_get_perm(permset, SMB_ACL_READ) ? S_IRUSR : 0);
864 ret |= (sys_acl_get_perm(permset, SMB_ACL_WRITE) ? S_IWUSR : 0);
865 ret |= (sys_acl_get_perm(permset, SMB_ACL_EXECUTE) ? S_IXUSR : 0);
870 /****************************************************************************
871 Map generic UNIX permissions to canon_ace permissions (a mode_t containing only S_(R|W|X)USR bits).
872 ****************************************************************************/
874 mode_t unix_perms_to_acl_perms(mode_t mode, int r_mask, int w_mask, int x_mask)
888 /****************************************************************************
889 Map canon_ace permissions (a mode_t containing only S_(R|W|X)USR bits) to
890 an SMB_ACL_PERMSET_T.
891 ****************************************************************************/
893 int map_acl_perms_to_permset(mode_t mode, SMB_ACL_PERMSET_T *p_permset)
895 if (sys_acl_clear_perms(*p_permset) == -1)
897 if (mode & S_IRUSR) {
898 if (sys_acl_add_perm(*p_permset, SMB_ACL_READ) == -1)
901 if (mode & S_IWUSR) {
902 if (sys_acl_add_perm(*p_permset, SMB_ACL_WRITE) == -1)
905 if (mode & S_IXUSR) {
906 if (sys_acl_add_perm(*p_permset, SMB_ACL_EXECUTE) == -1)
912 /****************************************************************************
913 Function to create owner and group SIDs from a SMB_STRUCT_STAT.
914 ****************************************************************************/
916 static void create_file_sids(const SMB_STRUCT_STAT *psbuf,
917 struct dom_sid *powner_sid,
918 struct dom_sid *pgroup_sid)
920 uid_to_sid( powner_sid, psbuf->st_ex_uid );
921 gid_to_sid( pgroup_sid, psbuf->st_ex_gid );
924 /****************************************************************************
925 Merge aces with a common UID or GID - if both are allow or deny, OR the permissions together and
926 delete the second one. If the first is deny, mask the permissions off and delete the allow
927 if the permissions become zero, delete the deny if the permissions are non zero.
928 ****************************************************************************/
930 static void merge_aces( canon_ace **pp_list_head, bool dir_acl)
932 canon_ace *l_head = *pp_list_head;
933 canon_ace *curr_ace_outer;
934 canon_ace *curr_ace_outer_next;
937 * First, merge allow entries with identical SIDs, and deny entries
938 * with identical SIDs.
941 for (curr_ace_outer = l_head; curr_ace_outer; curr_ace_outer = curr_ace_outer_next) {
943 canon_ace *curr_ace_next;
945 curr_ace_outer_next = curr_ace_outer->next; /* Save the link in case we delete. */
947 for (curr_ace = curr_ace_outer->next; curr_ace; curr_ace = curr_ace_next) {
948 bool can_merge = false;
950 curr_ace_next = curr_ace->next; /* Save the link in case of delete. */
952 /* For file ACLs we can merge if the SIDs and ALLOW/DENY
953 * types are the same. For directory acls we must also
954 * ensure the POSIX ACL types are the same.
956 * For the IDMAP_BOTH case, we must not merge
957 * the UID and GID ACE values for same SID
961 can_merge = (curr_ace->unix_ug.id == curr_ace_outer->unix_ug.id &&
962 curr_ace->owner_type == curr_ace_outer->owner_type &&
963 (curr_ace->attr == curr_ace_outer->attr));
965 can_merge = (curr_ace->unix_ug.id == curr_ace_outer->unix_ug.id &&
966 curr_ace->owner_type == curr_ace_outer->owner_type &&
967 (curr_ace->type == curr_ace_outer->type) &&
968 (curr_ace->attr == curr_ace_outer->attr));
972 if( DEBUGLVL( 10 )) {
973 dbgtext("merge_aces: Merging ACE's\n");
974 print_canon_ace( curr_ace_outer, 0);
975 print_canon_ace( curr_ace, 0);
978 /* Merge two allow or two deny ACE's. */
980 /* Theoretically we shouldn't merge a dir ACE if
981 * one ACE has the CI flag set, and the other
982 * ACE has the OI flag set, but this is rare
983 * enough we can ignore it. */
985 curr_ace_outer->perms |= curr_ace->perms;
986 curr_ace_outer->ace_flags |= curr_ace->ace_flags;
987 DLIST_REMOVE(l_head, curr_ace);
988 TALLOC_FREE(curr_ace);
989 curr_ace_outer_next = curr_ace_outer->next; /* We may have deleted the link. */
995 * Now go through and mask off allow permissions with deny permissions.
996 * We can delete either the allow or deny here as we know that each SID
997 * appears only once in the list.
1000 for (curr_ace_outer = l_head; curr_ace_outer; curr_ace_outer = curr_ace_outer_next) {
1001 canon_ace *curr_ace;
1002 canon_ace *curr_ace_next;
1004 curr_ace_outer_next = curr_ace_outer->next; /* Save the link in case we delete. */
1006 for (curr_ace = curr_ace_outer->next; curr_ace; curr_ace = curr_ace_next) {
1008 curr_ace_next = curr_ace->next; /* Save the link in case of delete. */
1011 * Subtract ACE's with different entries. Due to the ordering constraints
1012 * we've put on the ACL, we know the deny must be the first one.
1015 if (curr_ace->unix_ug.id == curr_ace_outer->unix_ug.id &&
1016 (curr_ace->owner_type == curr_ace_outer->owner_type) &&
1017 (curr_ace_outer->attr == DENY_ACE) && (curr_ace->attr == ALLOW_ACE)) {
1019 if( DEBUGLVL( 10 )) {
1020 dbgtext("merge_aces: Masking ACE's\n");
1021 print_canon_ace( curr_ace_outer, 0);
1022 print_canon_ace( curr_ace, 0);
1025 curr_ace->perms &= ~curr_ace_outer->perms;
1027 if (curr_ace->perms == 0) {
1030 * The deny overrides the allow. Remove the allow.
1033 DLIST_REMOVE(l_head, curr_ace);
1034 TALLOC_FREE(curr_ace);
1035 curr_ace_outer_next = curr_ace_outer->next; /* We may have deleted the link. */
1040 * Even after removing permissions, there
1041 * are still allow permissions - delete the deny.
1042 * It is safe to delete the deny here,
1043 * as we are guarenteed by the deny first
1044 * ordering that all the deny entries for
1045 * this SID have already been merged into one
1046 * before we can get to an allow ace.
1049 DLIST_REMOVE(l_head, curr_ace_outer);
1050 TALLOC_FREE(curr_ace_outer);
1055 } /* end for curr_ace */
1056 } /* end for curr_ace_outer */
1058 /* We may have modified the list. */
1060 *pp_list_head = l_head;
1063 /****************************************************************************
1064 Map canon_ace perms to permission bits NT.
1065 The attr element is not used here - we only process deny entries on set,
1066 not get. Deny entries are implicit on get with ace->perms = 0.
1067 ****************************************************************************/
1069 uint32_t map_canon_ace_perms(int snum,
1070 enum security_ace_type *pacl_type,
1074 uint32_t nt_mask = 0;
1076 *pacl_type = SEC_ACE_TYPE_ACCESS_ALLOWED;
1078 if (lp_acl_map_full_control(snum) && ((perms & ALL_ACE_PERMS) == ALL_ACE_PERMS)) {
1079 if (directory_ace) {
1080 nt_mask = UNIX_DIRECTORY_ACCESS_RWX;
1082 nt_mask = (UNIX_ACCESS_RWX & ~DELETE_ACCESS);
1084 } else if ((perms & ALL_ACE_PERMS) == (mode_t)0) {
1086 * Windows NT refuses to display ACEs with no permissions in them (but
1087 * they are perfectly legal with Windows 2000). If the ACE has empty
1088 * permissions we cannot use 0, so we use the otherwise unused
1089 * WRITE_OWNER permission, which we ignore when we set an ACL.
1090 * We abstract this into a #define of UNIX_ACCESS_NONE to allow this
1091 * to be changed in the future.
1096 if (directory_ace) {
1097 nt_mask |= ((perms & S_IRUSR) ? UNIX_DIRECTORY_ACCESS_R : 0 );
1098 nt_mask |= ((perms & S_IWUSR) ? UNIX_DIRECTORY_ACCESS_W : 0 );
1099 nt_mask |= ((perms & S_IXUSR) ? UNIX_DIRECTORY_ACCESS_X : 0 );
1101 nt_mask |= ((perms & S_IRUSR) ? UNIX_ACCESS_R : 0 );
1102 nt_mask |= ((perms & S_IWUSR) ? UNIX_ACCESS_W : 0 );
1103 nt_mask |= ((perms & S_IXUSR) ? UNIX_ACCESS_X : 0 );
1107 if ((perms & S_IWUSR) && lp_dos_filemode(snum)) {
1108 nt_mask |= (SEC_STD_WRITE_DAC|SEC_STD_WRITE_OWNER|DELETE_ACCESS);
1111 DEBUG(10,("map_canon_ace_perms: Mapped (UNIX) %x to (NT) %x\n",
1112 (unsigned int)perms, (unsigned int)nt_mask ));
1117 /****************************************************************************
1118 Map NT perms to a UNIX mode_t.
1119 ****************************************************************************/
1121 #define FILE_SPECIFIC_READ_BITS (FILE_READ_DATA|FILE_READ_EA)
1122 #define FILE_SPECIFIC_WRITE_BITS (FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_WRITE_EA)
1123 #define FILE_SPECIFIC_EXECUTE_BITS (FILE_EXECUTE)
1125 static mode_t map_nt_perms( uint32_t *mask, int type)
1131 if((*mask) & GENERIC_ALL_ACCESS)
1132 mode = S_IRUSR|S_IWUSR|S_IXUSR;
1134 mode |= ((*mask) & (GENERIC_READ_ACCESS|FILE_SPECIFIC_READ_BITS)) ? S_IRUSR : 0;
1135 mode |= ((*mask) & (GENERIC_WRITE_ACCESS|FILE_SPECIFIC_WRITE_BITS)) ? S_IWUSR : 0;
1136 mode |= ((*mask) & (GENERIC_EXECUTE_ACCESS|FILE_SPECIFIC_EXECUTE_BITS)) ? S_IXUSR : 0;
1140 if((*mask) & GENERIC_ALL_ACCESS)
1141 mode = S_IRGRP|S_IWGRP|S_IXGRP;
1143 mode |= ((*mask) & (GENERIC_READ_ACCESS|FILE_SPECIFIC_READ_BITS)) ? S_IRGRP : 0;
1144 mode |= ((*mask) & (GENERIC_WRITE_ACCESS|FILE_SPECIFIC_WRITE_BITS)) ? S_IWGRP : 0;
1145 mode |= ((*mask) & (GENERIC_EXECUTE_ACCESS|FILE_SPECIFIC_EXECUTE_BITS)) ? S_IXGRP : 0;
1149 if((*mask) & GENERIC_ALL_ACCESS)
1150 mode = S_IROTH|S_IWOTH|S_IXOTH;
1152 mode |= ((*mask) & (GENERIC_READ_ACCESS|FILE_SPECIFIC_READ_BITS)) ? S_IROTH : 0;
1153 mode |= ((*mask) & (GENERIC_WRITE_ACCESS|FILE_SPECIFIC_WRITE_BITS)) ? S_IWOTH : 0;
1154 mode |= ((*mask) & (GENERIC_EXECUTE_ACCESS|FILE_SPECIFIC_EXECUTE_BITS)) ? S_IXOTH : 0;
1162 /****************************************************************************
1163 Unpack a struct security_descriptor into a UNIX owner and group.
1164 ****************************************************************************/
1166 NTSTATUS unpack_nt_owners(struct connection_struct *conn,
1167 uid_t *puser, gid_t *pgrp,
1168 uint32_t security_info_sent, const struct
1169 security_descriptor *psd)
1174 if(security_info_sent == 0) {
1175 DEBUG(0,("unpack_nt_owners: no security info sent !\n"));
1176 return NT_STATUS_OK;
1180 * Validate the owner and group SID's.
1183 DEBUG(5,("unpack_nt_owners: validating owner_sids.\n"));
1186 * Don't immediately fail if the owner sid cannot be validated.
1187 * This may be a group chown only set.
1190 if (security_info_sent & SECINFO_OWNER) {
1191 if (!sid_to_uid(psd->owner_sid, puser)) {
1192 if (lp_force_unknown_acl_user(SNUM(conn))) {
1193 /* this allows take ownership to work
1195 *puser = get_current_uid(conn);
1197 struct dom_sid_buf buf;
1198 DBG_NOTICE("unable to validate"
1199 " owner sid for %s\n",
1200 dom_sid_str_buf(psd->owner_sid,
1202 return NT_STATUS_INVALID_OWNER;
1205 DEBUG(3,("unpack_nt_owners: owner sid mapped to uid %u\n",
1206 (unsigned int)*puser ));
1210 * Don't immediately fail if the group sid cannot be validated.
1211 * This may be an owner chown only set.
1214 if (security_info_sent & SECINFO_GROUP) {
1215 if (!sid_to_gid(psd->group_sid, pgrp)) {
1216 if (lp_force_unknown_acl_user(SNUM(conn))) {
1217 /* this allows take group ownership to work
1219 *pgrp = get_current_gid(conn);
1221 DEBUG(3,("unpack_nt_owners: unable to validate"
1223 return NT_STATUS_INVALID_OWNER;
1226 DEBUG(3,("unpack_nt_owners: group sid mapped to gid %u\n",
1227 (unsigned int)*pgrp));
1230 DEBUG(5,("unpack_nt_owners: owner_sids validated.\n"));
1232 return NT_STATUS_OK;
1236 static void trim_ace_perms(canon_ace *pace)
1238 pace->perms = pace->perms & (S_IXUSR|S_IWUSR|S_IRUSR);
1241 static void ensure_minimal_owner_ace_perms(const bool is_directory,
1244 pace->perms |= S_IRUSR;
1246 pace->perms |= (S_IWUSR|S_IXUSR);
1250 /****************************************************************************
1251 Check if a given uid/SID is in a group gid/SID. This is probably very
1252 expensive and will need optimisation. A *lot* of optimisation :-). JRA.
1253 ****************************************************************************/
1255 static bool uid_entry_in_group(connection_struct *conn, canon_ace *uid_ace, canon_ace *group_ace )
1257 bool is_sid = false;
1258 bool has_sid = false;
1259 struct security_token *security_token = NULL;
1261 /* "Everyone" always matches every uid. */
1263 if (dom_sid_equal(&group_ace->trustee, &global_sid_World))
1267 * if we have session info in conn, we already have the (SID
1268 * based) NT token and don't need to do the complex
1269 * user_in_group_sid() call
1271 if (conn->session_info) {
1272 security_token = conn->session_info->security_token;
1273 /* security_token should not be NULL */
1274 SMB_ASSERT(security_token);
1275 is_sid = security_token_is_sid(security_token,
1278 has_sid = security_token_has_sid(security_token,
1279 &group_ace->trustee);
1289 * if it's the current user, we already have the unix token
1290 * and don't need to do the complex user_in_group_sid() call
1292 if (uid_ace->unix_ug.id == get_current_uid(conn)) {
1293 const struct security_unix_token *curr_utok = NULL;
1296 if (group_ace->unix_ug.id == get_current_gid(conn)) {
1300 curr_utok = get_current_utok(conn);
1301 for (i=0; i < curr_utok->ngroups; i++) {
1302 if (group_ace->unix_ug.id == curr_utok->groups[i]) {
1309 * user_in_group_sid() uses create_token_from_sid()
1310 * which creates an artificial NT token given just a username,
1311 * so this is not reliable for users from foreign domains
1312 * exported by winbindd!
1314 return user_sid_in_group_sid(&uid_ace->trustee, &group_ace->trustee);
1317 /****************************************************************************
1318 A well formed POSIX file or default ACL has at least 3 entries, a
1319 SMB_ACL_USER_OBJ, SMB_ACL_GROUP_OBJ, SMB_ACL_OTHER_OBJ.
1320 In addition, the owner must always have at least read access.
1321 When using this call on get_acl, the pst struct is valid and contains
1322 the mode of the file.
1323 ****************************************************************************/
1325 static bool ensure_canon_entry_valid_on_get(connection_struct *conn,
1327 const struct dom_sid *pfile_owner_sid,
1328 const struct dom_sid *pfile_grp_sid,
1329 const SMB_STRUCT_STAT *pst)
1332 bool got_user = false;
1333 bool got_group = false;
1334 bool got_other = false;
1336 for (pace = *pp_ace; pace; pace = pace->next) {
1337 if (pace->type == SMB_ACL_USER_OBJ) {
1339 } else if (pace->type == SMB_ACL_GROUP_OBJ) {
1341 } else if (pace->type == SMB_ACL_OTHER) {
1347 if ((pace = talloc(talloc_tos(), canon_ace)) == NULL) {
1348 DEBUG(0,("malloc fail.\n"));
1353 pace->type = SMB_ACL_USER_OBJ;
1354 pace->owner_type = UID_ACE;
1355 pace->unix_ug.type = ID_TYPE_UID;
1356 pace->unix_ug.id = pst->st_ex_uid;
1357 pace->trustee = *pfile_owner_sid;
1358 pace->attr = ALLOW_ACE;
1359 pace->perms = unix_perms_to_acl_perms(pst->st_ex_mode, S_IRUSR, S_IWUSR, S_IXUSR);
1360 DLIST_ADD(*pp_ace, pace);
1364 if ((pace = talloc(talloc_tos(), canon_ace)) == NULL) {
1365 DEBUG(0,("malloc fail.\n"));
1370 pace->type = SMB_ACL_GROUP_OBJ;
1371 pace->owner_type = GID_ACE;
1372 pace->unix_ug.type = ID_TYPE_GID;
1373 pace->unix_ug.id = pst->st_ex_gid;
1374 pace->trustee = *pfile_grp_sid;
1375 pace->attr = ALLOW_ACE;
1376 pace->perms = unix_perms_to_acl_perms(pst->st_ex_mode, S_IRGRP, S_IWGRP, S_IXGRP);
1377 DLIST_ADD(*pp_ace, pace);
1381 if ((pace = talloc(talloc_tos(), canon_ace)) == NULL) {
1382 DEBUG(0,("malloc fail.\n"));
1387 pace->type = SMB_ACL_OTHER;
1388 pace->owner_type = WORLD_ACE;
1389 pace->unix_ug.type = ID_TYPE_NOT_SPECIFIED;
1390 pace->unix_ug.id = -1;
1391 pace->trustee = global_sid_World;
1392 pace->attr = ALLOW_ACE;
1393 pace->perms = unix_perms_to_acl_perms(pst->st_ex_mode, S_IROTH, S_IWOTH, S_IXOTH);
1394 DLIST_ADD(*pp_ace, pace);
1400 /****************************************************************************
1401 A well formed POSIX file or default ACL has at least 3 entries, a
1402 SMB_ACL_USER_OBJ, SMB_ACL_GROUP_OBJ, SMB_ACL_OTHER_OBJ.
1403 In addition, the owner must always have at least read access.
1404 When using this call on set_acl, the pst struct has
1405 been modified to have a mode containing the default for this file or directory
1407 ****************************************************************************/
1409 static bool ensure_canon_entry_valid_on_set(connection_struct *conn,
1411 bool is_default_acl,
1412 const struct share_params *params,
1413 const bool is_directory,
1414 const struct dom_sid *pfile_owner_sid,
1415 const struct dom_sid *pfile_grp_sid,
1416 const SMB_STRUCT_STAT *pst)
1419 canon_ace *pace_user = NULL;
1420 canon_ace *pace_group = NULL;
1421 canon_ace *pace_other = NULL;
1422 bool got_duplicate_user = false;
1423 bool got_duplicate_group = false;
1425 for (pace = *pp_ace; pace; pace = pace->next) {
1426 trim_ace_perms(pace);
1427 if (pace->type == SMB_ACL_USER_OBJ) {
1428 ensure_minimal_owner_ace_perms(is_directory, pace);
1430 } else if (pace->type == SMB_ACL_GROUP_OBJ) {
1432 } else if (pace->type == SMB_ACL_OTHER) {
1438 canon_ace *pace_iter;
1440 if ((pace = talloc(talloc_tos(), canon_ace)) == NULL) {
1441 DEBUG(0,("talloc fail.\n"));
1446 pace->type = SMB_ACL_USER_OBJ;
1447 pace->owner_type = UID_ACE;
1448 pace->unix_ug.type = ID_TYPE_UID;
1449 pace->unix_ug.id = pst->st_ex_uid;
1450 pace->trustee = *pfile_owner_sid;
1451 pace->attr = ALLOW_ACE;
1452 /* Start with existing user permissions, principle of least
1453 surprises for the user. */
1454 pace->perms = unix_perms_to_acl_perms(pst->st_ex_mode, S_IRUSR, S_IWUSR, S_IXUSR);
1456 /* See if the owning user is in any of the other groups in
1457 the ACE, or if there's a matching user entry (by uid
1458 or in the case of ID_TYPE_BOTH by SID).
1459 If so, OR in the permissions from that entry. */
1462 for (pace_iter = *pp_ace; pace_iter; pace_iter = pace_iter->next) {
1463 if (pace_iter->type == SMB_ACL_USER &&
1464 pace_iter->unix_ug.id == pace->unix_ug.id) {
1465 pace->perms |= pace_iter->perms;
1466 } else if (pace_iter->type == SMB_ACL_GROUP_OBJ || pace_iter->type == SMB_ACL_GROUP) {
1467 if (dom_sid_equal(&pace->trustee, &pace_iter->trustee)) {
1468 pace->perms |= pace_iter->perms;
1469 } else if (uid_entry_in_group(conn, pace, pace_iter)) {
1470 pace->perms |= pace_iter->perms;
1475 if (pace->perms == 0) {
1476 /* If we only got an "everyone" perm, just use that. */
1478 pace->perms = pace_other->perms;
1482 * Ensure we have default parameters for the
1483 * user (owner) even on default ACLs.
1485 ensure_minimal_owner_ace_perms(is_directory, pace);
1487 DLIST_ADD(*pp_ace, pace);
1492 if ((pace = talloc(talloc_tos(), canon_ace)) == NULL) {
1493 DEBUG(0,("talloc fail.\n"));
1498 pace->type = SMB_ACL_GROUP_OBJ;
1499 pace->owner_type = GID_ACE;
1500 pace->unix_ug.type = ID_TYPE_GID;
1501 pace->unix_ug.id = pst->st_ex_gid;
1502 pace->trustee = *pfile_grp_sid;
1503 pace->attr = ALLOW_ACE;
1505 /* If we only got an "everyone" perm, just use that. */
1507 pace->perms = pace_other->perms;
1512 DLIST_ADD(*pp_ace, pace);
1517 if ((pace = talloc(talloc_tos(), canon_ace)) == NULL) {
1518 DEBUG(0,("talloc fail.\n"));
1523 pace->type = SMB_ACL_OTHER;
1524 pace->owner_type = WORLD_ACE;
1525 pace->unix_ug.type = ID_TYPE_NOT_SPECIFIED;
1526 pace->unix_ug.id = -1;
1527 pace->trustee = global_sid_World;
1528 pace->attr = ALLOW_ACE;
1531 DLIST_ADD(*pp_ace, pace);
1535 /* Ensure when setting a POSIX ACL, that the uid for a
1536 SMB_ACL_USER_OBJ ACE (the owner ACE entry) has a duplicate
1537 permission entry as an SMB_ACL_USER, and a gid for a
1538 SMB_ACL_GROUP_OBJ ACE (the primary group ACE entry) also has
1539 a duplicate permission entry as an SMB_ACL_GROUP. If not,
1540 then if the ownership or group ownership of this file or
1541 directory gets changed, the user or group can lose their
1544 for (pace = *pp_ace; pace; pace = pace->next) {
1545 if (pace->type == SMB_ACL_USER &&
1546 pace->unix_ug.id == pace_user->unix_ug.id) {
1547 /* Already got one. */
1548 got_duplicate_user = true;
1549 } else if (pace->type == SMB_ACL_GROUP &&
1550 pace->unix_ug.id == pace_group->unix_ug.id) {
1551 /* Already got one. */
1552 got_duplicate_group = true;
1553 } else if ((pace->type == SMB_ACL_GROUP)
1554 && (dom_sid_equal(&pace->trustee, &pace_user->trustee))) {
1555 /* If the SID owning the file appears
1556 * in a group entry, then we have
1557 * enough duplication, they will still
1559 got_duplicate_user = true;
1563 /* If the SID is equal for the user and group that we need
1564 to add the duplicate for, add only the group */
1565 if (!got_duplicate_user && !got_duplicate_group
1566 && dom_sid_equal(&pace_group->trustee,
1567 &pace_user->trustee)) {
1568 /* Add a duplicate SMB_ACL_GROUP entry, this
1569 * will cover the owning SID as well, as it
1570 * will always be mapped to both a uid and
1573 if ((pace = talloc(talloc_tos(), canon_ace)) == NULL) {
1574 DEBUG(0,("talloc fail.\n"));
1579 pace->type = SMB_ACL_GROUP;;
1580 pace->owner_type = GID_ACE;
1581 pace->unix_ug.type = ID_TYPE_GID;
1582 pace->unix_ug.id = pace_group->unix_ug.id;
1583 pace->trustee = pace_group->trustee;
1584 pace->attr = pace_group->attr;
1585 pace->perms = pace_group->perms;
1587 DLIST_ADD(*pp_ace, pace);
1589 /* We're done here, make sure the
1590 statements below are not executed. */
1591 got_duplicate_user = true;
1592 got_duplicate_group = true;
1595 if (!got_duplicate_user) {
1596 /* Add a duplicate SMB_ACL_USER entry. */
1597 if ((pace = talloc(talloc_tos(), canon_ace)) == NULL) {
1598 DEBUG(0,("talloc fail.\n"));
1603 pace->type = SMB_ACL_USER;;
1604 pace->owner_type = UID_ACE;
1605 pace->unix_ug.type = ID_TYPE_UID;
1606 pace->unix_ug.id = pace_user->unix_ug.id;
1607 pace->trustee = pace_user->trustee;
1608 pace->attr = pace_user->attr;
1609 pace->perms = pace_user->perms;
1611 DLIST_ADD(*pp_ace, pace);
1613 got_duplicate_user = true;
1616 if (!got_duplicate_group) {
1617 /* Add a duplicate SMB_ACL_GROUP entry. */
1618 if ((pace = talloc(talloc_tos(), canon_ace)) == NULL) {
1619 DEBUG(0,("talloc fail.\n"));
1624 pace->type = SMB_ACL_GROUP;;
1625 pace->owner_type = GID_ACE;
1626 pace->unix_ug.type = ID_TYPE_GID;
1627 pace->unix_ug.id = pace_group->unix_ug.id;
1628 pace->trustee = pace_group->trustee;
1629 pace->attr = pace_group->attr;
1630 pace->perms = pace_group->perms;
1632 DLIST_ADD(*pp_ace, pace);
1634 got_duplicate_group = true;
1640 /****************************************************************************
1641 Check if a POSIX ACL has the required SMB_ACL_USER_OBJ and SMB_ACL_GROUP_OBJ entries.
1642 If it does not have them, check if there are any entries where the trustee is the
1643 file owner or the owning group, and map these to SMB_ACL_USER_OBJ and SMB_ACL_GROUP_OBJ.
1644 Note we must not do this to default directory ACLs.
1645 ****************************************************************************/
1647 static void check_owning_objs(canon_ace *ace, struct dom_sid *pfile_owner_sid, struct dom_sid *pfile_grp_sid)
1649 bool got_user_obj, got_group_obj;
1650 canon_ace *current_ace;
1653 entries = count_canon_ace_list(ace);
1654 got_user_obj = False;
1655 got_group_obj = False;
1657 for (i=0, current_ace = ace; i < entries; i++, current_ace = current_ace->next) {
1658 if (current_ace->type == SMB_ACL_USER_OBJ)
1659 got_user_obj = True;
1660 else if (current_ace->type == SMB_ACL_GROUP_OBJ)
1661 got_group_obj = True;
1663 if (got_user_obj && got_group_obj) {
1664 DEBUG(10,("check_owning_objs: ACL had owning user/group entries.\n"));
1668 for (i=0, current_ace = ace; i < entries; i++, current_ace = current_ace->next) {
1669 if (!got_user_obj && current_ace->owner_type == UID_ACE &&
1670 dom_sid_equal(¤t_ace->trustee, pfile_owner_sid)) {
1671 current_ace->type = SMB_ACL_USER_OBJ;
1672 got_user_obj = True;
1674 if (!got_group_obj && current_ace->owner_type == GID_ACE &&
1675 dom_sid_equal(¤t_ace->trustee, pfile_grp_sid)) {
1676 current_ace->type = SMB_ACL_GROUP_OBJ;
1677 got_group_obj = True;
1681 DEBUG(10,("check_owning_objs: ACL is missing an owner entry.\n"));
1683 DEBUG(10,("check_owning_objs: ACL is missing an owning group entry.\n"));
1686 static bool add_current_ace_to_acl(files_struct *fsp, struct security_ace *psa,
1687 canon_ace **file_ace, canon_ace **dir_ace,
1688 bool *got_file_allow, bool *got_dir_allow,
1689 bool *all_aces_are_inherit_only,
1690 canon_ace *current_ace)
1694 * Map the given NT permissions into a UNIX mode_t containing only
1695 * S_I(R|W|X)USR bits.
1698 current_ace->perms |= map_nt_perms( &psa->access_mask, S_IRUSR);
1699 current_ace->attr = (psa->type == SEC_ACE_TYPE_ACCESS_ALLOWED) ? ALLOW_ACE : DENY_ACE;
1701 /* Store the ace_flag. */
1702 current_ace->ace_flags = psa->flags;
1705 * Now add the created ace to either the file list, the directory
1706 * list, or both. We *MUST* preserve the order here (hence we use
1707 * DLIST_ADD_END) as NT ACLs are order dependent.
1710 if (fsp->fsp_flags.is_directory) {
1713 * We can only add to the default POSIX ACE list if the ACE is
1714 * designed to be inherited by both files and directories.
1717 if ((psa->flags & (SEC_ACE_FLAG_OBJECT_INHERIT|SEC_ACE_FLAG_CONTAINER_INHERIT)) ==
1718 (SEC_ACE_FLAG_OBJECT_INHERIT|SEC_ACE_FLAG_CONTAINER_INHERIT)) {
1720 canon_ace *current_dir_ace = current_ace;
1721 DLIST_ADD_END(*dir_ace, current_ace);
1724 * Note if this was an allow ace. We can't process
1725 * any further deny ace's after this.
1728 if (current_ace->attr == ALLOW_ACE)
1729 *got_dir_allow = True;
1731 if ((current_ace->attr == DENY_ACE) && *got_dir_allow) {
1732 DEBUG(0,("add_current_ace_to_acl: "
1734 "inheritable ACL! Deny entry "
1735 "after Allow entry. Failing "
1736 "to set on file %s.\n",
1741 if( DEBUGLVL( 10 )) {
1742 dbgtext("add_current_ace_to_acl: adding dir ACL:\n");
1743 print_canon_ace( current_ace, 0);
1747 * If this is not an inherit only ACE we need to add a duplicate
1751 if (!(psa->flags & SEC_ACE_FLAG_INHERIT_ONLY)) {
1752 canon_ace *dup_ace = dup_canon_ace(current_ace);
1755 DEBUG(0,("add_current_ace_to_acl: malloc fail !\n"));
1760 * We must not free current_ace here as its
1761 * pointer is now owned by the dir_ace list.
1763 current_ace = dup_ace;
1764 /* We've essentially split this ace into two,
1765 * and added the ace with inheritance request
1766 * bits to the directory ACL. Drop those bits for
1767 * the ACE we're adding to the file list. */
1768 current_ace->ace_flags &= ~(SEC_ACE_FLAG_OBJECT_INHERIT|
1769 SEC_ACE_FLAG_CONTAINER_INHERIT|
1770 SEC_ACE_FLAG_INHERIT_ONLY);
1773 * We must not free current_ace here as its
1774 * pointer is now owned by the dir_ace list.
1780 * current_ace is now either owned by file_ace
1781 * or is NULL. We can safely operate on current_dir_ace
1782 * to treat mapping for default acl entries differently
1783 * than access acl entries.
1786 if (current_dir_ace->owner_type == UID_ACE) {
1788 * We already decided above this is a uid,
1789 * for default acls ace's only CREATOR_OWNER
1790 * maps to ACL_USER_OBJ. All other uid
1791 * ace's are ACL_USER.
1793 if (dom_sid_equal(¤t_dir_ace->trustee,
1794 &global_sid_Creator_Owner)) {
1795 current_dir_ace->type = SMB_ACL_USER_OBJ;
1797 current_dir_ace->type = SMB_ACL_USER;
1801 if (current_dir_ace->owner_type == GID_ACE) {
1803 * We already decided above this is a gid,
1804 * for default acls ace's only CREATOR_GROUP
1805 * maps to ACL_GROUP_OBJ. All other uid
1806 * ace's are ACL_GROUP.
1808 if (dom_sid_equal(¤t_dir_ace->trustee,
1809 &global_sid_Creator_Group)) {
1810 current_dir_ace->type = SMB_ACL_GROUP_OBJ;
1812 current_dir_ace->type = SMB_ACL_GROUP;
1819 * Only add to the file ACL if not inherit only.
1822 if (current_ace && !(psa->flags & SEC_ACE_FLAG_INHERIT_ONLY)) {
1823 DLIST_ADD_END(*file_ace, current_ace);
1826 * Note if this was an allow ace. We can't process
1827 * any further deny ace's after this.
1830 if (current_ace->attr == ALLOW_ACE)
1831 *got_file_allow = True;
1833 if ((current_ace->attr == DENY_ACE) && *got_file_allow) {
1834 DEBUG(0,("add_current_ace_to_acl: malformed "
1835 "ACL in file ACL ! Deny entry after "
1836 "Allow entry. Failing to set on file "
1837 "%s.\n", fsp_str_dbg(fsp)));
1841 if( DEBUGLVL( 10 )) {
1842 dbgtext("add_current_ace_to_acl: adding file ACL:\n");
1843 print_canon_ace( current_ace, 0);
1845 *all_aces_are_inherit_only = False;
1847 * We must not free current_ace here as its
1848 * pointer is now owned by the file_ace list.
1854 * Free if ACE was not added.
1857 TALLOC_FREE(current_ace);
1861 /****************************************************************************
1862 Unpack a struct security_descriptor into two canonical ace lists.
1863 ****************************************************************************/
1865 static bool create_canon_ace_lists(files_struct *fsp,
1866 const SMB_STRUCT_STAT *pst,
1867 struct dom_sid *pfile_owner_sid,
1868 struct dom_sid *pfile_grp_sid,
1869 canon_ace **ppfile_ace,
1870 canon_ace **ppdir_ace,
1871 const struct security_acl *dacl)
1873 bool all_aces_are_inherit_only = (fsp->fsp_flags.is_directory);
1874 canon_ace *file_ace = NULL;
1875 canon_ace *dir_ace = NULL;
1876 canon_ace *current_ace = NULL;
1877 bool got_dir_allow = False;
1878 bool got_file_allow = False;
1885 * Convert the incoming ACL into a more regular form.
1888 for(i = 0; i < dacl->num_aces; i++) {
1889 struct security_ace *psa = &dacl->aces[i];
1891 if((psa->type != SEC_ACE_TYPE_ACCESS_ALLOWED) && (psa->type != SEC_ACE_TYPE_ACCESS_DENIED)) {
1892 DEBUG(3,("create_canon_ace_lists: unable to set anything but an ALLOW or DENY ACE.\n"));
1898 * Deal with the fact that NT 4.x re-writes the canonical format
1899 * that we return for default ACLs. If a directory ACE is identical
1900 * to a inherited directory ACE then NT changes the bits so that the
1901 * first ACE is set to OI|IO and the second ACE for this SID is set
1902 * to CI. We need to repair this. JRA.
1905 for(i = 0; i < dacl->num_aces; i++) {
1906 struct security_ace *psa1 = &dacl->aces[i];
1908 for (j = i + 1; j < dacl->num_aces; j++) {
1909 struct security_ace *psa2 = &dacl->aces[j];
1911 if (psa1->access_mask != psa2->access_mask)
1914 if (!dom_sid_equal(&psa1->trustee, &psa2->trustee))
1918 * Ok - permission bits and SIDs are equal.
1919 * Check if flags were re-written.
1922 if (psa1->flags & SEC_ACE_FLAG_INHERIT_ONLY) {
1924 psa1->flags |= (psa2->flags & (SEC_ACE_FLAG_CONTAINER_INHERIT|SEC_ACE_FLAG_OBJECT_INHERIT));
1925 psa2->flags &= ~(SEC_ACE_FLAG_CONTAINER_INHERIT|SEC_ACE_FLAG_OBJECT_INHERIT);
1927 } else if (psa2->flags & SEC_ACE_FLAG_INHERIT_ONLY) {
1929 psa2->flags |= (psa1->flags & (SEC_ACE_FLAG_CONTAINER_INHERIT|SEC_ACE_FLAG_OBJECT_INHERIT));
1930 psa1->flags &= ~(SEC_ACE_FLAG_CONTAINER_INHERIT|SEC_ACE_FLAG_OBJECT_INHERIT);
1936 for(i = 0; i < dacl->num_aces; i++) {
1937 struct security_ace *psa = &dacl->aces[i];
1940 * Create a canon_ace entry representing this NT DACL ACE.
1943 if ((current_ace = talloc(talloc_tos(), canon_ace)) == NULL) {
1944 free_canon_ace_list(file_ace);
1945 free_canon_ace_list(dir_ace);
1946 DEBUG(0,("create_canon_ace_lists: malloc fail.\n"));
1950 ZERO_STRUCTP(current_ace);
1952 sid_copy(¤t_ace->trustee, &psa->trustee);
1955 * Try and work out if the SID is a user or group
1956 * as we need to flag these differently for POSIX.
1957 * Note what kind of a POSIX ACL this should map to.
1960 if( dom_sid_equal(¤t_ace->trustee, &global_sid_World)) {
1961 current_ace->owner_type = WORLD_ACE;
1962 current_ace->unix_ug.type = ID_TYPE_NOT_SPECIFIED;
1963 current_ace->unix_ug.id = -1;
1964 current_ace->type = SMB_ACL_OTHER;
1965 } else if (dom_sid_equal(¤t_ace->trustee, &global_sid_Creator_Owner)) {
1966 current_ace->owner_type = UID_ACE;
1967 current_ace->unix_ug.type = ID_TYPE_UID;
1968 current_ace->unix_ug.id = pst->st_ex_uid;
1969 current_ace->type = SMB_ACL_USER_OBJ;
1972 * The Creator Owner entry only specifies inheritable permissions,
1973 * never access permissions. WinNT doesn't always set the ACE to
1974 * INHERIT_ONLY, though.
1977 psa->flags |= SEC_ACE_FLAG_INHERIT_ONLY;
1979 } else if (dom_sid_equal(¤t_ace->trustee, &global_sid_Creator_Group)) {
1980 current_ace->owner_type = GID_ACE;
1981 current_ace->unix_ug.type = ID_TYPE_GID;
1982 current_ace->unix_ug.id = pst->st_ex_gid;
1983 current_ace->type = SMB_ACL_GROUP_OBJ;
1986 * The Creator Group entry only specifies inheritable permissions,
1987 * never access permissions. WinNT doesn't always set the ACE to
1988 * INHERIT_ONLY, though.
1990 psa->flags |= SEC_ACE_FLAG_INHERIT_ONLY;
1993 struct unixid unixid;
1995 if (!sids_to_unixids(¤t_ace->trustee, 1, &unixid)) {
1996 struct dom_sid_buf buf;
1997 free_canon_ace_list(file_ace);
1998 free_canon_ace_list(dir_ace);
1999 TALLOC_FREE(current_ace);
2000 DBG_ERR("sids_to_unixids failed for %s "
2001 "(allocation failure)\n",
2002 dom_sid_str_buf(¤t_ace->trustee,
2007 if (unixid.type == ID_TYPE_BOTH) {
2009 * We must add both a user and group
2011 * This is due to the fact that in POSIX
2012 * user entries are more specific than
2015 current_ace->owner_type = UID_ACE;
2016 current_ace->unix_ug.type = ID_TYPE_UID;
2017 current_ace->unix_ug.id = unixid.id;
2019 (unixid.id == pst->st_ex_uid) ?
2023 /* Add the user object to the posix ACL,
2024 and proceed to the group mapping
2025 below. This handles the talloc_free
2026 of current_ace if not added for some
2028 if (!add_current_ace_to_acl(fsp,
2034 &all_aces_are_inherit_only,
2036 free_canon_ace_list(file_ace);
2037 free_canon_ace_list(dir_ace);
2041 if ((current_ace = talloc(talloc_tos(),
2042 canon_ace)) == NULL) {
2043 free_canon_ace_list(file_ace);
2044 free_canon_ace_list(dir_ace);
2045 DEBUG(0,("create_canon_ace_lists: "
2050 ZERO_STRUCTP(current_ace);
2052 sid_copy(¤t_ace->trustee, &psa->trustee);
2054 current_ace->unix_ug.type = ID_TYPE_GID;
2055 current_ace->unix_ug.id = unixid.id;
2056 current_ace->owner_type = GID_ACE;
2057 /* If it's the primary group, this is a
2058 group_obj, not a group. */
2059 if (current_ace->unix_ug.id == pst->st_ex_gid) {
2060 current_ace->type = SMB_ACL_GROUP_OBJ;
2062 current_ace->type = SMB_ACL_GROUP;
2065 } else if (unixid.type == ID_TYPE_UID) {
2066 current_ace->owner_type = UID_ACE;
2067 current_ace->unix_ug.type = ID_TYPE_UID;
2068 current_ace->unix_ug.id = unixid.id;
2069 /* If it's the owning user, this is a user_obj,
2071 if (current_ace->unix_ug.id == pst->st_ex_uid) {
2072 current_ace->type = SMB_ACL_USER_OBJ;
2074 current_ace->type = SMB_ACL_USER;
2076 } else if (unixid.type == ID_TYPE_GID) {
2077 current_ace->unix_ug.type = ID_TYPE_GID;
2078 current_ace->unix_ug.id = unixid.id;
2079 current_ace->owner_type = GID_ACE;
2080 /* If it's the primary group, this is a
2081 group_obj, not a group. */
2082 if (current_ace->unix_ug.id == pst->st_ex_gid) {
2083 current_ace->type = SMB_ACL_GROUP_OBJ;
2085 current_ace->type = SMB_ACL_GROUP;
2088 struct dom_sid_buf buf;
2090 * Silently ignore map failures in non-mappable SIDs (NT Authority, BUILTIN etc).
2093 if (non_mappable_sid(&psa->trustee)) {
2094 DBG_DEBUG("ignoring "
2095 "non-mappable SID %s\n",
2099 TALLOC_FREE(current_ace);
2103 if (lp_force_unknown_acl_user(SNUM(fsp->conn))) {
2104 DBG_DEBUG("ignoring unknown or "
2109 TALLOC_FREE(current_ace);
2113 free_canon_ace_list(file_ace);
2114 free_canon_ace_list(dir_ace);
2115 DBG_ERR("unable to map SID %s to uid or "
2117 dom_sid_str_buf(¤t_ace->trustee,
2119 TALLOC_FREE(current_ace);
2124 /* handles the talloc_free of current_ace if not added for some reason */
2125 if (!add_current_ace_to_acl(fsp, psa, &file_ace, &dir_ace,
2126 &got_file_allow, &got_dir_allow,
2127 &all_aces_are_inherit_only, current_ace)) {
2128 free_canon_ace_list(file_ace);
2129 free_canon_ace_list(dir_ace);
2134 if (fsp->fsp_flags.is_directory && all_aces_are_inherit_only) {
2136 * Windows 2000 is doing one of these weird 'inherit acl'
2137 * traverses to conserve NTFS ACL resources. Just pretend
2138 * there was no DACL sent. JRA.
2141 DEBUG(10,("create_canon_ace_lists: Win2k inherit acl traverse. Ignoring DACL.\n"));
2142 free_canon_ace_list(file_ace);
2143 free_canon_ace_list(dir_ace);
2148 * Check if we have SMB_ACL_USER_OBJ and SMB_ACL_GROUP_OBJ entries in
2149 * the file ACL. If we don't have them, check if any SMB_ACL_USER/SMB_ACL_GROUP
2150 * entries can be converted to *_OBJ. Don't do this for the default
2151 * ACL, we will create them separately for this if needed inside
2152 * ensure_canon_entry_valid_on_set().
2155 check_owning_objs(file_ace, pfile_owner_sid, pfile_grp_sid);
2159 *ppfile_ace = file_ace;
2160 *ppdir_ace = dir_ace;
2165 /****************************************************************************
2166 ASCII art time again... JRA :-).
2168 We have 4 cases to process when moving from an NT ACL to a POSIX ACL. Firstly,
2169 we insist the ACL is in canonical form (ie. all DENY entries preceede ALLOW
2170 entries). Secondly, the merge code has ensured that all duplicate SID entries for
2171 allow or deny have been merged, so the same SID can only appear once in the deny
2172 list or once in the allow list.
2174 We then process as follows :
2176 ---------------------------------------------------------------------------
2177 First pass - look for a Everyone DENY entry.
2179 If it is deny all (rwx) trunate the list at this point.
2180 Else, walk the list from this point and use the deny permissions of this
2181 entry as a mask on all following allow entries. Finally, delete
2182 the Everyone DENY entry (we have applied it to everything possible).
2184 In addition, in this pass we remove any DENY entries that have
2185 no permissions (ie. they are a DENY nothing).
2186 ---------------------------------------------------------------------------
2187 Second pass - only deal with deny user entries.
2189 DENY user1 (perms XXX)
2192 for all following allow group entries where user1 is in group
2193 new_perms |= group_perms;
2195 user1 entry perms = new_perms & ~ XXX;
2197 Convert the deny entry to an allow entry with the new perms and
2198 push to the end of the list. Note if the user was in no groups
2199 this maps to a specific allow nothing entry for this user.
2201 The common case from the NT ACL choser (userX deny all) is
2202 optimised so we don't do the group lookup - we just map to
2203 an allow nothing entry.
2205 What we're doing here is inferring the allow permissions the
2206 person setting the ACE on user1 wanted by looking at the allow
2207 permissions on the groups the user is currently in. This will
2208 be a snapshot, depending on group membership but is the best
2209 we can do and has the advantage of failing closed rather than
2211 ---------------------------------------------------------------------------
2212 Third pass - only deal with deny group entries.
2214 DENY group1 (perms XXX)
2216 for all following allow user entries where user is in group1
2217 user entry perms = user entry perms & ~ XXX;
2219 If there is a group Everyone allow entry with permissions YYY,
2220 convert the group1 entry to an allow entry and modify its
2223 new_perms = YYY & ~ XXX
2225 and push to the end of the list.
2227 If there is no group Everyone allow entry then convert the
2228 group1 entry to a allow nothing entry and push to the end of the list.
2230 Note that the common case from the NT ACL choser (groupX deny all)
2231 cannot be optimised here as we need to modify user entries who are
2232 in the group to change them to a deny all also.
2234 What we're doing here is modifying the allow permissions of
2235 user entries (which are more specific in POSIX ACLs) to mask
2236 out the explicit deny set on the group they are in. This will
2237 be a snapshot depending on current group membership but is the
2238 best we can do and has the advantage of failing closed rather
2240 ---------------------------------------------------------------------------
2241 Fourth pass - cope with cumulative permissions.
2243 for all allow user entries, if there exists an allow group entry with
2244 more permissive permissions, and the user is in that group, rewrite the
2245 allow user permissions to contain both sets of permissions.
2247 Currently the code for this is #ifdef'ed out as these semantics make
2248 no sense to me. JRA.
2249 ---------------------------------------------------------------------------
2251 Note we *MUST* do the deny user pass first as this will convert deny user
2252 entries into allow user entries which can then be processed by the deny
2255 The above algorithm took a *lot* of thinking about - hence this
2256 explaination :-). JRA.
2257 ****************************************************************************/
2259 /****************************************************************************
2260 Process a canon_ace list entries. This is very complex code. We need
2261 to go through and remove the "deny" permissions from any allow entry that matches
2262 the id of this entry. We have already refused any NT ACL that wasn't in correct
2263 order (DENY followed by ALLOW). If any allow entry ends up with zero permissions,
2264 we just remove it (to fail safe). We have already removed any duplicate ace
2265 entries. Treat an "Everyone" DENY_ACE as a special case - use it to mask all
2267 ****************************************************************************/
2269 static void process_deny_list(connection_struct *conn, canon_ace **pp_ace_list )
2271 canon_ace *ace_list = *pp_ace_list;
2272 canon_ace *curr_ace = NULL;
2273 canon_ace *curr_ace_next = NULL;
2275 /* Pass 1 above - look for an Everyone, deny entry. */
2277 for (curr_ace = ace_list; curr_ace; curr_ace = curr_ace_next) {
2278 canon_ace *allow_ace_p;
2280 curr_ace_next = curr_ace->next; /* So we can't lose the link. */
2282 if (curr_ace->attr != DENY_ACE)
2285 if (curr_ace->perms == (mode_t)0) {
2287 /* Deny nothing entry - delete. */
2289 DLIST_REMOVE(ace_list, curr_ace);
2293 if (!dom_sid_equal(&curr_ace->trustee, &global_sid_World))
2296 /* JRATEST - assert. */
2297 SMB_ASSERT(curr_ace->owner_type == WORLD_ACE);
2299 if (curr_ace->perms == ALL_ACE_PERMS) {
2302 * Optimisation. This is a DENY_ALL to Everyone. Truncate the
2303 * list at this point including this entry.
2306 canon_ace *prev_entry = DLIST_PREV(curr_ace);
2308 free_canon_ace_list( curr_ace );
2310 DLIST_REMOVE(ace_list, prev_entry);
2312 /* We deleted the entire list. */
2318 for (allow_ace_p = curr_ace->next; allow_ace_p; allow_ace_p = allow_ace_p->next) {
2321 * Only mask off allow entries.
2324 if (allow_ace_p->attr != ALLOW_ACE)
2327 allow_ace_p->perms &= ~curr_ace->perms;
2331 * Now it's been applied, remove it.
2334 DLIST_REMOVE(ace_list, curr_ace);
2337 /* Pass 2 above - deal with deny user entries. */
2339 for (curr_ace = ace_list; curr_ace; curr_ace = curr_ace_next) {
2340 mode_t new_perms = (mode_t)0;
2341 canon_ace *allow_ace_p;
2343 curr_ace_next = curr_ace->next; /* So we can't lose the link. */
2345 if (curr_ace->attr != DENY_ACE)
2348 if (curr_ace->owner_type != UID_ACE)
2351 if (curr_ace->perms == ALL_ACE_PERMS) {
2354 * Optimisation - this is a deny everything to this user.
2355 * Convert to an allow nothing and push to the end of the list.
2358 curr_ace->attr = ALLOW_ACE;
2359 curr_ace->perms = (mode_t)0;
2360 DLIST_DEMOTE(ace_list, curr_ace);
2364 for (allow_ace_p = curr_ace->next; allow_ace_p; allow_ace_p = allow_ace_p->next) {
2366 if (allow_ace_p->attr != ALLOW_ACE)
2369 /* We process GID_ACE and WORLD_ACE entries only. */
2371 if (allow_ace_p->owner_type == UID_ACE)
2374 if (uid_entry_in_group(conn, curr_ace, allow_ace_p))
2375 new_perms |= allow_ace_p->perms;
2379 * Convert to a allow entry, modify the perms and push to the end
2383 curr_ace->attr = ALLOW_ACE;
2384 curr_ace->perms = (new_perms & ~curr_ace->perms);
2385 DLIST_DEMOTE(ace_list, curr_ace);
2388 /* Pass 3 above - deal with deny group entries. */
2390 for (curr_ace = ace_list; curr_ace; curr_ace = curr_ace_next) {
2391 canon_ace *allow_ace_p;
2392 canon_ace *allow_everyone_p = NULL;
2394 curr_ace_next = curr_ace->next; /* So we can't lose the link. */
2396 if (curr_ace->attr != DENY_ACE)
2399 if (curr_ace->owner_type != GID_ACE)
2402 for (allow_ace_p = curr_ace->next; allow_ace_p; allow_ace_p = allow_ace_p->next) {
2404 if (allow_ace_p->attr != ALLOW_ACE)
2407 /* Store a pointer to the Everyone allow, if it exists. */
2408 if (allow_ace_p->owner_type == WORLD_ACE)
2409 allow_everyone_p = allow_ace_p;
2411 /* We process UID_ACE entries only. */
2413 if (allow_ace_p->owner_type != UID_ACE)
2416 /* Mask off the deny group perms. */
2418 if (uid_entry_in_group(conn, allow_ace_p, curr_ace))
2419 allow_ace_p->perms &= ~curr_ace->perms;
2423 * Convert the deny to an allow with the correct perms and
2424 * push to the end of the list.
2427 curr_ace->attr = ALLOW_ACE;
2428 if (allow_everyone_p)
2429 curr_ace->perms = allow_everyone_p->perms & ~curr_ace->perms;
2431 curr_ace->perms = (mode_t)0;
2432 DLIST_DEMOTE(ace_list, curr_ace);
2435 /* Doing this fourth pass allows Windows semantics to be layered
2436 * on top of POSIX semantics. I'm not sure if this is desirable.
2437 * For example, in W2K ACLs there is no way to say, "Group X no
2438 * access, user Y full access" if user Y is a member of group X.
2439 * This seems completely broken semantics to me.... JRA.
2443 /* Pass 4 above - deal with allow entries. */
2445 for (curr_ace = ace_list; curr_ace; curr_ace = curr_ace_next) {
2446 canon_ace *allow_ace_p;
2448 curr_ace_next = curr_ace->next; /* So we can't lose the link. */
2450 if (curr_ace->attr != ALLOW_ACE)
2453 if (curr_ace->owner_type != UID_ACE)
2456 for (allow_ace_p = ace_list; allow_ace_p; allow_ace_p = allow_ace_p->next) {
2458 if (allow_ace_p->attr != ALLOW_ACE)
2461 /* We process GID_ACE entries only. */
2463 if (allow_ace_p->owner_type != GID_ACE)
2466 /* OR in the group perms. */
2468 if (uid_entry_in_group(conn, curr_ace, allow_ace_p))
2469 curr_ace->perms |= allow_ace_p->perms;
2474 *pp_ace_list = ace_list;
2477 /****************************************************************************
2478 Unpack a struct security_descriptor into two canonical ace lists. We don't depend on this
2480 ****************************************************************************/
2482 static bool unpack_canon_ace(files_struct *fsp,
2483 const SMB_STRUCT_STAT *pst,
2484 struct dom_sid *pfile_owner_sid,
2485 struct dom_sid *pfile_grp_sid,
2486 canon_ace **ppfile_ace,
2487 canon_ace **ppdir_ace,
2488 uint32_t security_info_sent,
2489 const struct security_descriptor *psd)
2491 canon_ace *file_ace = NULL;
2492 canon_ace *dir_ace = NULL;
2498 if(security_info_sent == 0) {
2499 DEBUG(0,("unpack_canon_ace: no security info sent !\n"));
2504 * If no DACL then this is a chown only security descriptor.
2507 if(!(security_info_sent & SECINFO_DACL) || !psd->dacl)
2511 * Now go through the DACL and create the canon_ace lists.
2514 if (!create_canon_ace_lists(fsp, pst, pfile_owner_sid, pfile_grp_sid,
2515 &file_ace, &dir_ace, psd->dacl)) {
2519 if ((file_ace == NULL) && (dir_ace == NULL)) {
2520 /* W2K traverse DACL set - ignore. */
2525 * Go through the canon_ace list and merge entries
2526 * belonging to identical users of identical allow or deny type.
2527 * We can do this as all deny entries come first, followed by
2528 * all allow entries (we have mandated this before accepting this acl).
2531 print_canon_ace_list( "file ace - before merge", file_ace);
2532 merge_aces( &file_ace, false);
2534 print_canon_ace_list( "dir ace - before merge", dir_ace);
2535 merge_aces( &dir_ace, true);
2538 * NT ACLs are order dependent. Go through the acl lists and
2539 * process DENY entries by masking the allow entries.
2542 print_canon_ace_list( "file ace - before deny", file_ace);
2543 process_deny_list(fsp->conn, &file_ace);
2545 print_canon_ace_list( "dir ace - before deny", dir_ace);
2546 process_deny_list(fsp->conn, &dir_ace);
2549 * A well formed POSIX file or default ACL has at least 3 entries, a
2550 * SMB_ACL_USER_OBJ, SMB_ACL_GROUP_OBJ, SMB_ACL_OTHER_OBJ
2551 * and optionally a mask entry. Ensure this is the case.
2554 print_canon_ace_list( "file ace - before valid", file_ace);
2556 ok = ensure_canon_entry_valid_on_set(
2561 fsp->fsp_flags.is_directory,
2566 free_canon_ace_list(file_ace);
2567 free_canon_ace_list(dir_ace);
2571 print_canon_ace_list( "dir ace - before valid", dir_ace);
2573 if (dir_ace != NULL) {
2574 ok = ensure_canon_entry_valid_on_set(
2579 fsp->fsp_flags.is_directory,
2584 free_canon_ace_list(file_ace);
2585 free_canon_ace_list(dir_ace);
2590 print_canon_ace_list( "file ace - return", file_ace);
2591 print_canon_ace_list( "dir ace - return", dir_ace);
2593 *ppfile_ace = file_ace;
2594 *ppdir_ace = dir_ace;
2599 /******************************************************************************
2600 When returning permissions, try and fit NT display
2601 semantics if possible. Note the the canon_entries here must have been malloced.
2602 The list format should be - first entry = owner, followed by group and other user
2603 entries, last entry = other.
2605 Note that this doesn't exactly match the NT semantics for an ACL. As POSIX entries
2606 are not ordered, and match on the most specific entry rather than walking a list,
2607 then a simple POSIX permission of rw-r--r-- should really map to 5 entries,
2609 Entry 0: owner : deny all except read and write.
2610 Entry 1: owner : allow read and write.
2611 Entry 2: group : deny all except read.
2612 Entry 3: group : allow read.
2613 Entry 4: Everyone : allow read.
2615 But NT cannot display this in their ACL editor !
2616 ********************************************************************************/
2618 static void arrange_posix_perms(const char *filename, canon_ace **pp_list_head)
2620 canon_ace *l_head = *pp_list_head;
2621 canon_ace *owner_ace = NULL;
2622 canon_ace *other_ace = NULL;
2623 canon_ace *ace = NULL;
2625 for (ace = l_head; ace; ace = ace->next) {
2626 if (ace->type == SMB_ACL_USER_OBJ)
2628 else if (ace->type == SMB_ACL_OTHER) {
2629 /* Last ace - this is "other" */
2634 if (!owner_ace || !other_ace) {
2635 DEBUG(0,("arrange_posix_perms: Invalid POSIX permissions for file %s, missing owner or other.\n",
2641 * The POSIX algorithm applies to owner first, and other last,
2642 * so ensure they are arranged in this order.
2646 DLIST_PROMOTE(l_head, owner_ace);
2650 DLIST_DEMOTE(l_head, other_ace);
2653 /* We have probably changed the head of the list. */
2655 *pp_list_head = l_head;
2658 /****************************************************************************
2659 Create a linked list of canonical ACE entries.
2660 ****************************************************************************/
2662 static canon_ace *canonicalise_acl(struct connection_struct *conn,
2663 const char *fname, SMB_ACL_T posix_acl,
2664 const SMB_STRUCT_STAT *psbuf,
2665 const struct dom_sid *powner, const struct dom_sid *pgroup, struct pai_val *pal, SMB_ACL_TYPE_T the_acl_type)
2667 mode_t acl_mask = (S_IRUSR|S_IWUSR|S_IXUSR);
2668 canon_ace *l_head = NULL;
2669 canon_ace *ace = NULL;
2670 canon_ace *next_ace = NULL;
2671 int entry_id = SMB_ACL_FIRST_ENTRY;
2672 bool is_default_acl = (the_acl_type == SMB_ACL_TYPE_DEFAULT);
2673 SMB_ACL_ENTRY_T entry;
2676 while ( posix_acl && (sys_acl_get_entry(posix_acl, entry_id, &entry) == 1)) {
2677 SMB_ACL_TAG_T tagtype;
2678 SMB_ACL_PERMSET_T permset;
2680 struct unixid unix_ug;
2681 enum ace_owner owner_type;
2683 entry_id = SMB_ACL_NEXT_ENTRY;
2685 if (sys_acl_get_tag_type(entry, &tagtype) == -1)
2688 if (sys_acl_get_permset(entry, &permset) == -1)
2691 /* Decide which SID to use based on the ACL type. */
2693 case SMB_ACL_USER_OBJ:
2694 /* Get the SID from the owner. */
2695 sid_copy(&sid, powner);
2696 unix_ug.type = ID_TYPE_UID;
2697 unix_ug.id = psbuf->st_ex_uid;
2698 owner_type = UID_ACE;
2702 uid_t *puid = (uid_t *)sys_acl_get_qualifier(entry);
2704 DEBUG(0,("canonicalise_acl: Failed to get uid.\n"));
2707 uid_to_sid( &sid, *puid);
2708 unix_ug.type = ID_TYPE_UID;
2710 owner_type = UID_ACE;
2713 case SMB_ACL_GROUP_OBJ:
2714 /* Get the SID from the owning group. */
2715 sid_copy(&sid, pgroup);
2716 unix_ug.type = ID_TYPE_GID;
2717 unix_ug.id = psbuf->st_ex_gid;
2718 owner_type = GID_ACE;
2722 gid_t *pgid = (gid_t *)sys_acl_get_qualifier(entry);
2724 DEBUG(0,("canonicalise_acl: Failed to get gid.\n"));
2727 gid_to_sid( &sid, *pgid);
2728 unix_ug.type = ID_TYPE_GID;
2730 owner_type = GID_ACE;
2734 acl_mask = convert_permset_to_mode_t(permset);
2735 continue; /* Don't count the mask as an entry. */
2737 /* Use the Everyone SID */
2738 sid = global_sid_World;
2739 unix_ug.type = ID_TYPE_NOT_SPECIFIED;
2741 owner_type = WORLD_ACE;
2744 DEBUG(0,("canonicalise_acl: Unknown tagtype %u\n", (unsigned int)tagtype));
2749 * Add this entry to the list.
2752 if ((ace = talloc(talloc_tos(), canon_ace)) == NULL)
2755 *ace = (canon_ace) {
2757 .perms = convert_permset_to_mode_t(permset),
2761 .owner_type = owner_type
2763 ace->ace_flags = get_pai_flags(pal, ace, is_default_acl);
2765 DLIST_ADD(l_head, ace);
2769 * This next call will ensure we have at least a user/group/world set.
2772 if (!ensure_canon_entry_valid_on_get(conn, &l_head,
2778 * Now go through the list, masking the permissions with the
2779 * acl_mask. Ensure all DENY Entries are at the start of the list.
2782 DEBUG(10,("canonicalise_acl: %s ace entries before arrange :\n", is_default_acl ? "Default" : "Access"));
2784 for ( ace_count = 0, ace = l_head; ace; ace = next_ace, ace_count++) {
2785 next_ace = ace->next;
2787 /* Masks are only applied to entries other than USER_OBJ and OTHER. */
2788 if (ace->type != SMB_ACL_OTHER && ace->type != SMB_ACL_USER_OBJ)
2789 ace->perms &= acl_mask;
2791 if (ace->perms == 0) {
2792 DLIST_PROMOTE(l_head, ace);
2795 if( DEBUGLVL( 10 ) ) {
2796 print_canon_ace(ace, ace_count);
2800 arrange_posix_perms(fname,&l_head );
2802 print_canon_ace_list( "canonicalise_acl: ace entries after arrange", l_head );
2808 free_canon_ace_list(l_head);
2812 /****************************************************************************
2813 Check if the current user group list contains a given group.
2814 ****************************************************************************/
2816 bool current_user_in_group(connection_struct *conn, gid_t gid)
2819 const struct security_unix_token *utok = get_current_utok(conn);
2821 for (i = 0; i < utok->ngroups; i++) {
2822 if (utok->groups[i] == gid) {
2830 /****************************************************************************
2831 Should we override a deny ? Check 'acl group control' and 'dos filemode'.
2832 ****************************************************************************/
2834 static bool acl_group_override(connection_struct *conn,
2835 const struct smb_filename *smb_fname)
2837 if ((errno != EPERM) && (errno != EACCES)) {
2841 /* file primary group == user primary or supplementary group */
2842 if (lp_acl_group_control(SNUM(conn)) &&
2843 current_user_in_group(conn, smb_fname->st.st_ex_gid)) {
2847 /* user has writeable permission */
2848 if (lp_dos_filemode(SNUM(conn)) &&
2849 can_write_to_file(conn,
2858 /****************************************************************************
2859 Attempt to apply an ACL to a file or directory.
2860 ****************************************************************************/
2862 static bool set_canon_ace_list(files_struct *fsp,
2865 const SMB_STRUCT_STAT *psbuf,
2866 bool *pacl_set_support)
2868 connection_struct *conn = fsp->conn;
2870 SMB_ACL_T the_acl = sys_acl_init(talloc_tos());
2873 SMB_ACL_ENTRY_T mask_entry;
2874 bool got_mask_entry = False;
2875 SMB_ACL_PERMSET_T mask_permset;
2876 SMB_ACL_TYPE_T the_acl_type = (default_ace ? SMB_ACL_TYPE_DEFAULT : SMB_ACL_TYPE_ACCESS);
2877 bool needs_mask = False;
2878 mode_t mask_perms = 0;
2880 /* Use the psbuf that was passed in. */
2881 if (psbuf != &fsp->fsp_name->st) {
2882 fsp->fsp_name->st = *psbuf;
2885 #if defined(POSIX_ACL_NEEDS_MASK)
2886 /* HP-UX always wants to have a mask (called "class" there). */
2890 if (the_acl == NULL) {
2891 DEBUG(0, ("sys_acl_init failed to allocate an ACL\n"));
2895 if( DEBUGLVL( 10 )) {
2896 dbgtext("set_canon_ace_list: setting ACL:\n");
2897 for (i = 0, p_ace = the_ace; p_ace; p_ace = p_ace->next, i++ ) {
2898 print_canon_ace( p_ace, i);
2902 for (i = 0, p_ace = the_ace; p_ace; p_ace = p_ace->next, i++ ) {
2903 SMB_ACL_ENTRY_T the_entry;
2904 SMB_ACL_PERMSET_T the_permset;
2907 * ACLs only "need" an ACL_MASK entry if there are any named user or
2908 * named group entries. But if there is an ACL_MASK entry, it applies
2909 * to ACL_USER, ACL_GROUP, and ACL_GROUP_OBJ entries. Set the mask
2910 * so that it doesn't deny (i.e., mask off) any permissions.
2913 if (p_ace->type == SMB_ACL_USER || p_ace->type == SMB_ACL_GROUP) {
2915 mask_perms |= p_ace->perms;
2916 } else if (p_ace->type == SMB_ACL_GROUP_OBJ) {
2917 mask_perms |= p_ace->perms;
2921 * Get the entry for this ACE.
2924 if (sys_acl_create_entry(&the_acl, &the_entry) == -1) {
2925 DEBUG(0,("set_canon_ace_list: Failed to create entry %d. (%s)\n",
2926 i, strerror(errno) ));
2930 if (p_ace->type == SMB_ACL_MASK) {
2931 mask_entry = the_entry;
2932 got_mask_entry = True;
2936 * Ok - we now know the ACL calls should be working, don't
2937 * allow fallback to chmod.
2940 *pacl_set_support = True;
2943 * Initialise the entry from the canon_ace.
2947 * First tell the entry what type of ACE this is.
2950 if (sys_acl_set_tag_type(the_entry, p_ace->type) == -1) {
2951 DEBUG(0,("set_canon_ace_list: Failed to set tag type on entry %d. (%s)\n",
2952 i, strerror(errno) ));
2957 * Only set the qualifier (user or group id) if the entry is a user
2961 if ((p_ace->type == SMB_ACL_USER) || (p_ace->type == SMB_ACL_GROUP)) {
2962 if (sys_acl_set_qualifier(the_entry,(void *)&p_ace->unix_ug.id) == -1) {
2963 DEBUG(0,("set_canon_ace_list: Failed to set qualifier on entry %d. (%s)\n",
2964 i, strerror(errno) ));
2970 * Convert the mode_t perms in the canon_ace to a POSIX permset.
2973 if (sys_acl_get_permset(the_entry, &the_permset) == -1) {
2974 DEBUG(0,("set_canon_ace_list: Failed to get permset on entry %d. (%s)\n",
2975 i, strerror(errno) ));
2979 if (map_acl_perms_to_permset(p_ace->perms, &the_permset) == -1) {
2980 DEBUG(0,("set_canon_ace_list: Failed to create permset for mode (%u) on entry %d. (%s)\n",
2981 (unsigned int)p_ace->perms, i, strerror(errno) ));
2986 * ..and apply them to the entry.
2989 if (sys_acl_set_permset(the_entry, the_permset) == -1) {
2990 DEBUG(0,("set_canon_ace_list: Failed to add permset on entry %d. (%s)\n",
2991 i, strerror(errno) ));
2996 print_canon_ace( p_ace, i);
3000 if (needs_mask && !got_mask_entry) {
3001 if (sys_acl_create_entry(&the_acl, &mask_entry) == -1) {
3002 DEBUG(0,("set_canon_ace_list: Failed to create mask entry. (%s)\n", strerror(errno) ));
3006 if (sys_acl_set_tag_type(mask_entry, SMB_ACL_MASK) == -1) {
3007 DEBUG(0,("set_canon_ace_list: Failed to set tag type on mask entry. (%s)\n",strerror(errno) ));
3011 if (sys_acl_get_permset(mask_entry, &mask_permset) == -1) {
3012 DEBUG(0,("set_canon_ace_list: Failed to get mask permset. (%s)\n", strerror(errno) ));
3016 if (map_acl_perms_to_permset(S_IRUSR|S_IWUSR|S_IXUSR, &mask_permset) == -1) {
3017 DEBUG(0,("set_canon_ace_list: Failed to create mask permset. (%s)\n", strerror(errno) ));
3021 if (sys_acl_set_permset(mask_entry, mask_permset) == -1) {
3022 DEBUG(0,("set_canon_ace_list: Failed to add mask permset. (%s)\n", strerror(errno) ));
3028 * Finally apply it to the file or directory.
3031 if (default_ace || fsp->fsp_flags.is_directory || fsp->fh->fd == -1) {
3032 if (SMB_VFS_SYS_ACL_SET_FILE(conn, fsp->fsp_name,
3033 the_acl_type, the_acl) == -1) {
3035 * Some systems allow all the above calls and only fail with no ACL support
3036 * when attempting to apply the acl. HPUX with HFS is an example of this. JRA.
3038 if (no_acl_syscall_error(errno)) {
3039 *pacl_set_support = False;
3042 if (acl_group_override(conn, fsp->fsp_name)) {
3045 DEBUG(5,("set_canon_ace_list: acl group "
3046 "control on and current user in file "
3047 "%s primary group.\n",
3051 sret = SMB_VFS_SYS_ACL_SET_FILE(conn,
3052 fsp->fsp_name, the_acl_type,
3061 DEBUG(2,("set_canon_ace_list: "
3062 "sys_acl_set_file type %s failed for "
3064 the_acl_type == SMB_ACL_TYPE_DEFAULT ?
3065 "directory default" : "file",
3066 fsp_str_dbg(fsp), strerror(errno)));
3071 if (SMB_VFS_SYS_ACL_SET_FD(fsp, the_acl) == -1) {
3073 * Some systems allow all the above calls and only fail with no ACL support
3074 * when attempting to apply the acl. HPUX with HFS is an example of this. JRA.
3076 if (no_acl_syscall_error(errno)) {
3077 *pacl_set_support = False;
3080 if (acl_group_override(conn, fsp->fsp_name)) {
3083 DEBUG(5,("set_canon_ace_list: acl group "
3084 "control on and current user in file "
3085 "%s primary group.\n",
3089 sret = SMB_VFS_SYS_ACL_SET_FD(fsp, the_acl);
3097 DEBUG(2,("set_canon_ace_list: "
3098 "sys_acl_set_file failed for file %s "
3100 fsp_str_dbg(fsp), strerror(errno)));
3110 if (the_acl != NULL) {
3111 TALLOC_FREE(the_acl);
3117 /****************************************************************************
3119 ****************************************************************************/
3121 SMB_ACL_T free_empty_sys_acl(connection_struct *conn, SMB_ACL_T the_acl)
3123 SMB_ACL_ENTRY_T entry;
3127 if (sys_acl_get_entry(the_acl, SMB_ACL_FIRST_ENTRY, &entry) != 1) {
3128 TALLOC_FREE(the_acl);
3134 /****************************************************************************
3135 Convert a canon_ace to a generic 3 element permission - if possible.
3136 ****************************************************************************/
3138 #define MAP_PERM(p,mask,result) (((p) & (mask)) ? (result) : 0 )
3140 static bool convert_canon_ace_to_posix_perms( files_struct *fsp, canon_ace *file_ace_list, mode_t *posix_perms)
3142 size_t ace_count = count_canon_ace_list(file_ace_list);
3144 canon_ace *owner_ace = NULL;
3145 canon_ace *group_ace = NULL;
3146 canon_ace *other_ace = NULL;
3148 if (ace_count > 5) {
3149 DEBUG(3,("convert_canon_ace_to_posix_perms: Too many ACE "
3150 "entries for file %s to convert to posix perms.\n",
3155 for (ace_p = file_ace_list; ace_p; ace_p = ace_p->next) {
3156 if (ace_p->owner_type == UID_ACE)
3158 else if (ace_p->owner_type == GID_ACE)
3160 else if (ace_p->owner_type == WORLD_ACE)
3164 if (!owner_ace || !group_ace || !other_ace) {
3165 DEBUG(3,("convert_canon_ace_to_posix_perms: Can't get "
3166 "standard entries for file %s.\n", fsp_str_dbg(fsp)));
3171 * Ensure all ACE entries are owner, group or other.
3172 * We can't set if there are any other SIDs.
3174 for (ace_p = file_ace_list; ace_p; ace_p = ace_p->next) {
3175 if (ace_p == owner_ace || ace_p == group_ace ||
3176 ace_p == other_ace) {
3179 if (ace_p->owner_type == UID_ACE) {
3180 if (ace_p->unix_ug.id != owner_ace->unix_ug.id) {
3181 DEBUG(3,("Invalid uid %u in ACE for file %s.\n",
3182 (unsigned int)ace_p->unix_ug.id,
3186 } else if (ace_p->owner_type == GID_ACE) {
3187 if (ace_p->unix_ug.id != group_ace->unix_ug.id) {
3188 DEBUG(3,("Invalid gid %u in ACE for file %s.\n",
3189 (unsigned int)ace_p->unix_ug.id,
3195 * There should be no duplicate WORLD_ACE entries.
3198 DEBUG(3,("Invalid type %u, uid %u in "
3199 "ACE for file %s.\n",
3200 (unsigned int)ace_p->owner_type,
3201 (unsigned int)ace_p->unix_ug.id,
3207 *posix_perms = (mode_t)0;
3209 *posix_perms |= owner_ace->perms;
3210 *posix_perms |= MAP_PERM(group_ace->perms, S_IRUSR, S_IRGRP);
3211 *posix_perms |= MAP_PERM(group_ace->perms, S_IWUSR, S_IWGRP);
3212 *posix_perms |= MAP_PERM(group_ace->perms, S_IXUSR, S_IXGRP);
3213 *posix_perms |= MAP_PERM(other_ace->perms, S_IRUSR, S_IROTH);
3214 *posix_perms |= MAP_PERM(other_ace->perms, S_IWUSR, S_IWOTH);
3215 *posix_perms |= MAP_PERM(other_ace->perms, S_IXUSR, S_IXOTH);
3217 /* The owner must have at least read access. */
3219 *posix_perms |= S_IRUSR;
3220 if (fsp->fsp_flags.is_directory)
3221 *posix_perms |= (S_IWUSR|S_IXUSR);
3223 DEBUG(10,("convert_canon_ace_to_posix_perms: converted u=%o,g=%o,w=%o "
3224 "to perm=0%o for file %s.\n", (int)owner_ace->perms,
3225 (int)group_ace->perms, (int)other_ace->perms,
3226 (int)*posix_perms, fsp_str_dbg(fsp)));
3231 /****************************************************************************
3232 Incoming NT ACLs on a directory can be split into a default POSIX acl (CI|OI|IO) and
3233 a normal POSIX acl. Win2k needs these split acls re-merging into one ACL
3234 with CI|OI set so it is inherited and also applies to the directory.
3235 Based on code from "Jim McDonough" <jmcd@us.ibm.com>.
3236 ****************************************************************************/
3238 static size_t merge_default_aces( struct security_ace *nt_ace_list, size_t num_aces)
3242 for (i = 0; i < num_aces; i++) {
3243 for (j = i+1; j < num_aces; j++) {
3244 uint32_t i_flags_ni = (nt_ace_list[i].flags & ~SEC_ACE_FLAG_INHERITED_ACE);
3245 uint32_t j_flags_ni = (nt_ace_list[j].flags & ~SEC_ACE_FLAG_INHERITED_ACE);
3246 bool i_inh = (nt_ace_list[i].flags & SEC_ACE_FLAG_INHERITED_ACE) ? True : False;
3247 bool j_inh = (nt_ace_list[j].flags & SEC_ACE_FLAG_INHERITED_ACE) ? True : False;
3249 /* We know the lower number ACE's are file entries. */
3250 if ((nt_ace_list[i].type == nt_ace_list[j].type) &&
3251 (nt_ace_list[i].size == nt_ace_list[j].size) &&
3252 (nt_ace_list[i].access_mask == nt_ace_list[j].access_mask) &&
3253 dom_sid_equal(&nt_ace_list[i].trustee, &nt_ace_list[j].trustee) &&
3255 (i_flags_ni == 0) &&
3256 (j_flags_ni == (SEC_ACE_FLAG_OBJECT_INHERIT|
3257 SEC_ACE_FLAG_CONTAINER_INHERIT|
3258 SEC_ACE_FLAG_INHERIT_ONLY))) {
3260 * W2K wants to have access allowed zero access ACE's
3261 * at the end of the list. If the mask is zero, merge
3262 * the non-inherited ACE onto the inherited ACE.
3265 if (nt_ace_list[i].access_mask == 0) {
3266 nt_ace_list[j].flags = SEC_ACE_FLAG_OBJECT_INHERIT|SEC_ACE_FLAG_CONTAINER_INHERIT|
3267 (i_inh ? SEC_ACE_FLAG_INHERITED_ACE : 0);
3268 ARRAY_DEL_ELEMENT(nt_ace_list, i, num_aces);
3270 DEBUG(10,("merge_default_aces: Merging zero access ACE %u onto ACE %u.\n",
3271 (unsigned int)i, (unsigned int)j ));
3274 * These are identical except for the flags.
3275 * Merge the inherited ACE onto the non-inherited ACE.
3278 nt_ace_list[i].flags = SEC_ACE_FLAG_OBJECT_INHERIT|SEC_ACE_FLAG_CONTAINER_INHERIT|
3279 (i_inh ? SEC_ACE_FLAG_INHERITED_ACE : 0);
3280 ARRAY_DEL_ELEMENT(nt_ace_list, j, num_aces);
3282 DEBUG(10,("merge_default_aces: Merging ACE %u onto ACE %u.\n",
3283 (unsigned int)j, (unsigned int)i ));
3295 /****************************************************************************
3296 Reply to query a security descriptor from an fsp. If it succeeds it allocates
3297 the space for the return elements and returns the size needed to return the
3298 security descriptor. This should be the only external function needed for
3299 the UNIX style get ACL.
3300 ****************************************************************************/
3302 static NTSTATUS posix_get_nt_acl_common(struct connection_struct *conn,
3304 const SMB_STRUCT_STAT *sbuf,
3305 struct pai_val *pal,
3306 SMB_ACL_T posix_acl,
3308 uint32_t security_info,
3309 TALLOC_CTX *mem_ctx,
3310 struct security_descriptor **ppdesc)
3312 struct dom_sid owner_sid;
3313 struct dom_sid group_sid;
3315 struct security_acl *psa = NULL;
3316 size_t num_acls = 0;
3317 size_t num_def_acls = 0;
3318 size_t num_aces = 0;
3319 canon_ace *file_ace = NULL;
3320 canon_ace *dir_ace = NULL;
3321 struct security_ace *nt_ace_list = NULL;
3322 struct security_descriptor *psd = NULL;
3325 * Get the owner, group and world SIDs.
3328 create_file_sids(sbuf, &owner_sid, &group_sid);
3330 if (security_info & SECINFO_DACL) {
3333 * In the optimum case Creator Owner and Creator Group would be used for
3334 * the ACL_USER_OBJ and ACL_GROUP_OBJ entries, respectively, but this
3335 * would lead to usability problems under Windows: The Creator entries
3336 * are only available in browse lists of directories and not for files;
3337 * additionally the identity of the owning group couldn't be determined.
3338 * We therefore use those identities only for Default ACLs.
3341 /* Create the canon_ace lists. */
3342 file_ace = canonicalise_acl(conn, name, posix_acl, sbuf,
3343 &owner_sid, &group_sid, pal,
3344 SMB_ACL_TYPE_ACCESS);
3346 /* We must have *some* ACLS. */
3348 if (count_canon_ace_list(file_ace) == 0) {
3349 DEBUG(0,("get_nt_acl : No ACLs on file (%s) !\n", name));
3353 if (S_ISDIR(sbuf->st_ex_mode) && def_acl) {
3354 dir_ace = canonicalise_acl(conn, name, def_acl,
3356 &global_sid_Creator_Owner,
3357 &global_sid_Creator_Group,
3358 pal, SMB_ACL_TYPE_DEFAULT);
3362 * Create the NT ACE list from the canonical ace lists.
3367 enum security_ace_type nt_acl_type;
3369 num_acls = count_canon_ace_list(file_ace);
3370 num_def_acls = count_canon_ace_list(dir_ace);
3372 nt_ace_list = talloc_zero_array(
3373 talloc_tos(), struct security_ace,
3374 num_acls + num_def_acls);
3376 if (nt_ace_list == NULL) {
3377 DEBUG(0,("get_nt_acl: Unable to malloc space for nt_ace_list.\n"));
3382 * Create the NT ACE list from the canonical ace lists.
3385 for (ace = file_ace; ace != NULL; ace = ace->next) {
3386 uint32_t acc = map_canon_ace_perms(SNUM(conn),
3389 S_ISDIR(sbuf->st_ex_mode));
3390 init_sec_ace(&nt_ace_list[num_aces++],
3397 for (ace = dir_ace; ace != NULL; ace = ace->next) {
3398 uint32_t acc = map_canon_ace_perms(SNUM(conn),
3401 S_ISDIR(sbuf->st_ex_mode));
3402 init_sec_ace(&nt_ace_list[num_aces++],
3407 SEC_ACE_FLAG_OBJECT_INHERIT|
3408 SEC_ACE_FLAG_CONTAINER_INHERIT|
3409 SEC_ACE_FLAG_INHERIT_ONLY);
3413 * Merge POSIX default ACLs and normal ACLs into one NT ACE.
3414 * Win2K needs this to get the inheritance correct when replacing ACLs
3415 * on a directory tree. Based on work by Jim @ IBM.
3418 num_aces = merge_default_aces(nt_ace_list, num_aces);
3422 if((psa = make_sec_acl( talloc_tos(), NT4_ACL_REVISION, num_aces, nt_ace_list)) == NULL) {
3423 DEBUG(0,("get_nt_acl: Unable to malloc space for acl.\n"));
3427 } /* security_info & SECINFO_DACL */
3429 psd = make_standard_sec_desc(mem_ctx,
3430 (security_info & SECINFO_OWNER) ? &owner_sid : NULL,
3431 (security_info & SECINFO_GROUP) ? &group_sid : NULL,
3436 DEBUG(0,("get_nt_acl: Unable to malloc space for security descriptor.\n"));
3442 * Windows 2000: The DACL_PROTECTED flag in the security
3443 * descriptor marks the ACL as non-inheriting, i.e., no
3444 * ACEs from higher level directories propagate to this
3445 * ACL. In the POSIX ACL model permissions are only
3446 * inherited at file create time, so ACLs never contain
3447 * any ACEs that are inherited dynamically. The DACL_PROTECTED
3448 * flag doesn't seem to bother Windows NT.
3449 * Always set this if map acl inherit is turned off.
3451 if (pal == NULL || !lp_map_acl_inherit(SNUM(conn))) {
3452 psd->type |= SEC_DESC_DACL_PROTECTED;
3454 psd->type |= pal->sd_type;
3458 dacl_sort_into_canonical_order(psd->dacl->aces, (unsigned int)psd->dacl->num_aces);
3466 TALLOC_FREE(posix_acl);
3469 TALLOC_FREE(def_acl);
3471 free_canon_ace_list(file_ace);
3472 free_canon_ace_list(dir_ace);
3473 free_inherited_info(pal);
3474 TALLOC_FREE(nt_ace_list);
3476 return NT_STATUS_OK;
3479 NTSTATUS posix_fget_nt_acl(struct files_struct *fsp, uint32_t security_info,
3480 TALLOC_CTX *mem_ctx,
3481 struct security_descriptor **ppdesc)
3483 SMB_STRUCT_STAT sbuf;
3484 SMB_ACL_T posix_acl = NULL;
3485 struct pai_val *pal;
3486 TALLOC_CTX *frame = talloc_stackframe();
3491 DEBUG(10,("posix_fget_nt_acl: called for file %s\n",
3494 /* Get the stat struct for the owner info. */
3495 if(SMB_VFS_FSTAT(fsp, &sbuf) != 0) {
3497 return map_nt_error_from_unix(errno);
3500 /* Get the ACL from the fd. */
3501 posix_acl = SMB_VFS_SYS_ACL_GET_FD(fsp, frame);
3503 pal = fload_inherited_info(fsp);
3505 status = posix_get_nt_acl_common(fsp->conn, fsp->fsp_name->base_name,
3506 &sbuf, pal, posix_acl, NULL,
3507 security_info, mem_ctx, ppdesc);
3512 NTSTATUS posix_get_nt_acl(struct connection_struct *conn,
3513 const struct smb_filename *smb_fname_in,
3514 uint32_t security_info,
3515 TALLOC_CTX *mem_ctx,
3516 struct security_descriptor **ppdesc)
3518 SMB_ACL_T posix_acl = NULL;
3519 SMB_ACL_T def_acl = NULL;
3520 struct pai_val *pal;
3521 struct smb_filename *smb_fname = NULL;
3523 TALLOC_CTX *frame = talloc_stackframe();
3528 DEBUG(10,("posix_get_nt_acl: called for file %s\n",
3529 smb_fname_in->base_name ));
3531 smb_fname = cp_smb_filename(talloc_tos(), smb_fname_in);
3532 if (smb_fname == NULL) {
3534 return NT_STATUS_NO_MEMORY;
3537 /* Get the stat struct for the owner info. */
3539 * We can directly use SMB_VFS_STAT here, as if this was a
3540 * POSIX call on a symlink, we've already refused it.
3541 * For a Windows acl mapped call on a symlink, we want to follow
3544 ret = SMB_VFS_STAT(conn, smb_fname);
3548 return map_nt_error_from_unix(errno);
3551 /* Get the ACL from the path. */
3552 posix_acl = SMB_VFS_SYS_ACL_GET_FILE(conn, smb_fname,
3553 SMB_ACL_TYPE_ACCESS, frame);
3555 /* If it's a directory get the default POSIX ACL. */
3556 if(S_ISDIR(smb_fname->st.st_ex_mode)) {
3557 def_acl = SMB_VFS_SYS_ACL_GET_FILE(conn, smb_fname,
3558 SMB_ACL_TYPE_DEFAULT, frame);
3559 def_acl = free_empty_sys_acl(conn, def_acl);
3562 pal = load_inherited_info(conn, smb_fname);
3564 status = posix_get_nt_acl_common(conn,
3565 smb_fname->base_name,
3577 /****************************************************************************
3578 Try to chown a file. We will be able to chown it under the following conditions.
3580 1) If we have root privileges, then it will just work.
3581 2) If we have SeRestorePrivilege we can change the user + group to any other user.
3582 3) If we have SeTakeOwnershipPrivilege we can change the user to the current user.
3583 4) If we have write permission to the file and dos_filemodes is set
3584 then allow chown to the currently authenticated user.
3585 ****************************************************************************/
3587 NTSTATUS try_chown(files_struct *fsp, uid_t uid, gid_t gid)
3592 if(!CAN_WRITE(fsp->conn)) {
3593 return NT_STATUS_MEDIA_WRITE_PROTECTED;
3597 ret = SMB_VFS_FCHOWN(fsp, uid, gid);
3599 return NT_STATUS_OK;
3602 /* Case (2) / (3) */
3603 if (lp_enable_privileges()) {
3604 bool has_take_ownership_priv = security_token_has_privilege(
3605 get_current_nttok(fsp->conn),
3606 SEC_PRIV_TAKE_OWNERSHIP);
3607 bool has_restore_priv = security_token_has_privilege(
3608 get_current_nttok(fsp->conn),
3611 if (has_restore_priv) {
3613 } else if (has_take_ownership_priv) {
3615 if (uid == get_current_uid(fsp->conn)) {
3618 has_take_ownership_priv = false;
3622 if (has_take_ownership_priv || has_restore_priv) {
3623 status = NT_STATUS_OK;
3625 ret = SMB_VFS_FCHOWN(fsp, uid, gid);
3627 status = map_nt_error_from_unix(errno);
3635 if (!lp_dos_filemode(SNUM(fsp->conn))) {
3636 return NT_STATUS_ACCESS_DENIED;
3639 /* only allow chown to the current user. This is more secure,
3640 and also copes with the case where the SID in a take ownership ACL is
3641 a local SID on the users workstation
3643 if (uid != get_current_uid(fsp->conn)) {
3644 return NT_STATUS_INVALID_OWNER;
3647 status = NT_STATUS_OK;
3649 /* Keep the current file gid the same. */
3650 ret = SMB_VFS_FCHOWN(fsp, uid, (gid_t)-1);
3652 status = map_nt_error_from_unix(errno);
3659 /****************************************************************************
3660 Reply to set a security descriptor on an fsp. security_info_sent is the
3661 description of the following NT ACL.
3662 This should be the only external function needed for the UNIX style set ACL.
3663 We make a copy of psd_orig as internal functions modify the elements inside
3664 it, even though it's a const pointer.
3665 ****************************************************************************/
3667 NTSTATUS set_nt_acl(files_struct *fsp, uint32_t security_info_sent, const struct security_descriptor *psd_orig)
3669 connection_struct *conn = fsp->conn;
3670 uid_t user = (uid_t)-1;
3671 gid_t grp = (gid_t)-1;
3672 struct dom_sid file_owner_sid;
3673 struct dom_sid file_grp_sid;
3674 canon_ace *file_ace_list = NULL;
3675 canon_ace *dir_ace_list = NULL;
3676 bool acl_perms = False;
3677 mode_t orig_mode = (mode_t)0;
3679 bool set_acl_as_root = false;
3680 bool acl_set_support = false;
3682 struct security_descriptor *psd = NULL;
3684 DEBUG(10,("set_nt_acl: called for file %s\n",
3687 if (!CAN_WRITE(conn)) {
3688 DEBUG(10,("set acl rejected on read-only share\n"));
3689 return NT_STATUS_MEDIA_WRITE_PROTECTED;
3692 if (psd_orig == NULL) {
3693 return NT_STATUS_INVALID_PARAMETER;
3697 * MS NFS mode, here's the deal: the client merely wants to
3698 * modify the mode, but roundtripping get_acl/set/acl would
3699 * add additional POSIX ACEs. So in case we get a request
3700 * containing a MS NFS mode SID, we do nothing here.
3702 if (security_descriptor_with_ms_nfs(psd_orig)) {
3703 return NT_STATUS_OK;
3706 psd = security_descriptor_copy(talloc_tos(), psd_orig);
3708 return NT_STATUS_NO_MEMORY;
3712 * Get the current state of the file.
3715 status = vfs_stat_fsp(fsp);
3716 if (!NT_STATUS_IS_OK(status)) {
3720 /* Save the original element we check against. */
3721 orig_mode = fsp->fsp_name->st.st_ex_mode;
3724 * Unpack the user/group/world id's.
3727 /* POSIX can't cope with missing owner/group. */
3728 if ((security_info_sent & SECINFO_OWNER) && (psd->owner_sid == NULL)) {
3729 security_info_sent &= ~SECINFO_OWNER;
3731 if ((security_info_sent & SECINFO_GROUP) && (psd->group_sid == NULL)) {
3732 security_info_sent &= ~SECINFO_GROUP;
3735 /* If UNIX owner is inherited and Windows isn't, then
3736 * setting the UNIX owner based on Windows owner conflicts
3737 * with the inheritance rule
3739 if (lp_inherit_owner(SNUM(conn)) == INHERIT_OWNER_UNIX_ONLY) {
3740 security_info_sent &= ~SECINFO_OWNER;
3743 status = unpack_nt_owners( conn, &user, &grp, security_info_sent, psd);
3744 if (!NT_STATUS_IS_OK(status)) {
3749 * Do we need to chown ? If so this must be done first as the incoming
3750 * CREATOR_OWNER acl will be relative to the *new* owner, not the old.
3754 if (((user != (uid_t)-1) && (fsp->fsp_name->st.st_ex_uid != user)) ||
3755 (( grp != (gid_t)-1) && (fsp->fsp_name->st.st_ex_gid != grp))) {
3757 DEBUG(3,("set_nt_acl: chown %s. uid = %u, gid = %u.\n",
3758 fsp_str_dbg(fsp), (unsigned int)user,
3759 (unsigned int)grp));
3761 status = try_chown(fsp, user, grp);
3762 if(!NT_STATUS_IS_OK(status)) {
3763 DEBUG(3,("set_nt_acl: chown %s, %u, %u failed. Error "
3764 "= %s.\n", fsp_str_dbg(fsp),
3767 nt_errstr(status)));
3772 * Recheck the current state of the file, which may have changed.
3773 * (suid/sgid bits, for instance)
3776 status = vfs_stat_fsp(fsp);
3777 if (!NT_STATUS_IS_OK(status)) {
3781 /* Save the original element we check against. */
3782 orig_mode = fsp->fsp_name->st.st_ex_mode;
3784 /* If we successfully chowned, we know we must
3785 * be able to set the acl, so do it as root.
3787 set_acl_as_root = true;
3790 create_file_sids(&fsp->fsp_name->st, &file_owner_sid, &file_grp_sid);
3792 if((security_info_sent & SECINFO_DACL) &&
3793 (psd->type & SEC_DESC_DACL_PRESENT) &&
3794 (psd->dacl == NULL)) {
3795 struct security_ace ace[3];
3797 /* We can't have NULL DACL in POSIX.
3798 Use owner/group/Everyone -> full access. */
3800 init_sec_ace(&ace[0],
3802 SEC_ACE_TYPE_ACCESS_ALLOWED,
3805 init_sec_ace(&ace[1],
3807 SEC_ACE_TYPE_ACCESS_ALLOWED,
3810 init_sec_ace(&ace[2],
3812 SEC_ACE_TYPE_ACCESS_ALLOWED,
3815 psd->dacl = make_sec_acl(talloc_tos(),
3819 if (psd->dacl == NULL) {
3820 return NT_STATUS_NO_MEMORY;
3822 security_acl_map_generic(psd->dacl, &file_generic_mapping);
3825 acl_perms = unpack_canon_ace(fsp, &fsp->fsp_name->st, &file_owner_sid,
3826 &file_grp_sid, &file_ace_list,
3827 &dir_ace_list, security_info_sent, psd);
3829 /* Ignore W2K traverse DACL set. */
3830 if (!file_ace_list && !dir_ace_list) {
3831 return NT_STATUS_OK;
3835 DEBUG(3,("set_nt_acl: cannot set permissions\n"));
3836 free_canon_ace_list(file_ace_list);
3837 free_canon_ace_list(dir_ace_list);
3838 return NT_STATUS_ACCESS_DENIED;
3842 * Only change security if we got a DACL.
3845 if(!(security_info_sent & SECINFO_DACL) || (psd->dacl == NULL)) {
3846 free_canon_ace_list(file_ace_list);
3847 free_canon_ace_list(dir_ace_list);
3848 return NT_STATUS_OK;
3852 * Try using the POSIX ACL set first. Fall back to chmod if
3853 * we have no ACL support on this filesystem.
3856 if (acl_perms && file_ace_list) {
3857 if (set_acl_as_root) {
3860 ret = set_canon_ace_list(fsp, file_ace_list, false,
3861 &fsp->fsp_name->st, &acl_set_support);
3862 if (set_acl_as_root) {
3865 if (acl_set_support && ret == false) {
3866 DEBUG(3,("set_nt_acl: failed to set file acl on file "
3867 "%s (%s).\n", fsp_str_dbg(fsp),
3869 free_canon_ace_list(file_ace_list);
3870 free_canon_ace_list(dir_ace_list);
3871 return map_nt_error_from_unix(errno);
3875 if (acl_perms && acl_set_support && fsp->fsp_flags.is_directory) {
3877 if (set_acl_as_root) {
3880 ret = set_canon_ace_list(fsp, dir_ace_list, true,
3883 if (set_acl_as_root) {
3887 DEBUG(3,("set_nt_acl: failed to set default "
3888 "acl on directory %s (%s).\n",
3889 fsp_str_dbg(fsp), strerror(errno)));
3890 free_canon_ace_list(file_ace_list);
3891 free_canon_ace_list(dir_ace_list);
3892 return map_nt_error_from_unix(errno);
3898 * No default ACL - delete one if it exists.
3901 if (set_acl_as_root) {
3904 sret = SMB_VFS_SYS_ACL_DELETE_DEF_FILE(conn,
3906 if (set_acl_as_root) {
3910 if (acl_group_override(conn, fsp->fsp_name)) {
3911 DEBUG(5,("set_nt_acl: acl group "
3912 "control on and current user "
3913 "in file %s primary group. "
3914 "Override delete_def_acl\n",
3919 SMB_VFS_SYS_ACL_DELETE_DEF_FILE(
3926 DEBUG(3,("set_nt_acl: sys_acl_delete_def_file failed (%s)\n", strerror(errno)));
3927 free_canon_ace_list(file_ace_list);
3928 free_canon_ace_list(dir_ace_list);
3929 return map_nt_error_from_unix(errno);
3935 if (acl_set_support) {
3936 if (set_acl_as_root) {
3939 store_inheritance_attributes(fsp,
3943 if (set_acl_as_root) {
3949 * If we cannot set using POSIX ACLs we fall back to checking if we need to chmod.
3952 if(!acl_set_support && acl_perms) {
3955 if (!convert_canon_ace_to_posix_perms( fsp, file_ace_list, &posix_perms)) {
3956 free_canon_ace_list(file_ace_list);
3957 free_canon_ace_list(dir_ace_list);
3958 DEBUG(3,("set_nt_acl: failed to convert file acl to "
3959 "posix permissions for file %s.\n",
3961 return NT_STATUS_ACCESS_DENIED;
3964 if (orig_mode != posix_perms) {
3967 DEBUG(3,("set_nt_acl: chmod %s. perms = 0%o.\n",
3968 fsp_str_dbg(fsp), (unsigned int)posix_perms));
3970 if (set_acl_as_root) {
3973 sret = SMB_VFS_FCHMOD(fsp, posix_perms);
3974 if (set_acl_as_root) {
3978 if (acl_group_override(conn, fsp->fsp_name)) {
3979 DEBUG(5,("set_nt_acl: acl group "
3980 "control on and current user "
3981 "in file %s primary group. "
3986 sret = SMB_VFS_FCHMOD(fsp, posix_perms);
3991 DEBUG(3,("set_nt_acl: chmod %s, 0%o "
3992 "failed. Error = %s.\n",
3994 (unsigned int)posix_perms,
3996 free_canon_ace_list(file_ace_list);
3997 free_canon_ace_list(dir_ace_list);
3998 return map_nt_error_from_unix(errno);
4004 free_canon_ace_list(file_ace_list);
4005 free_canon_ace_list(dir_ace_list);
4007 /* Ensure the stat struct in the fsp is correct. */
4008 status = vfs_stat_fsp(fsp);
4010 return NT_STATUS_OK;
4013 /****************************************************************************
4014 Get the actual group bits stored on a file with an ACL. Has no effect if
4015 the file has no ACL. Needed in dosmode code where the stat() will return
4016 the mask bits, not the real group bits, for a file with an ACL.
4017 ****************************************************************************/
4019 int get_acl_group_bits( connection_struct *conn,
4020 const struct smb_filename *smb_fname,
4023 int entry_id = SMB_ACL_FIRST_ENTRY;
4024 SMB_ACL_ENTRY_T entry;
4025 SMB_ACL_T posix_acl;
4028 posix_acl = SMB_VFS_SYS_ACL_GET_FILE(conn, smb_fname,
4029 SMB_ACL_TYPE_ACCESS, talloc_tos());
4030 if (posix_acl == (SMB_ACL_T)NULL)
4033 while (sys_acl_get_entry(posix_acl, entry_id, &entry) == 1) {
4034 SMB_ACL_TAG_T tagtype;
4035 SMB_ACL_PERMSET_T permset;
4037 entry_id = SMB_ACL_NEXT_ENTRY;
4039 if (sys_acl_get_tag_type(entry, &tagtype) ==-1)
4042 if (tagtype == SMB_ACL_GROUP_OBJ) {
4043 if (sys_acl_get_permset(entry, &permset) == -1) {
4046 *mode &= ~(S_IRGRP|S_IWGRP|S_IXGRP);
4047 *mode |= (sys_acl_get_perm(permset, SMB_ACL_READ) ? S_IRGRP : 0);
4048 *mode |= (sys_acl_get_perm(permset, SMB_ACL_WRITE) ? S_IWGRP : 0);
4049 *mode |= (sys_acl_get_perm(permset, SMB_ACL_EXECUTE) ? S_IXGRP : 0);
4055 TALLOC_FREE(posix_acl);
4059 /****************************************************************************
4060 Do a chmod by setting the ACL USER_OBJ, GROUP_OBJ and OTHER bits in an ACL
4061 and set the mask to rwx. Needed to preserve complex ACLs set by NT.
4062 ****************************************************************************/
4064 static int chmod_acl_internals( connection_struct *conn, SMB_ACL_T posix_acl, mode_t mode)
4066 int entry_id = SMB_ACL_FIRST_ENTRY;
4067 SMB_ACL_ENTRY_T entry;
4068 int num_entries = 0;
4070 while ( sys_acl_get_entry(posix_acl, entry_id, &entry) == 1) {
4071 SMB_ACL_TAG_T tagtype;
4072 SMB_ACL_PERMSET_T permset;
4075 entry_id = SMB_ACL_NEXT_ENTRY;
4077 if (sys_acl_get_tag_type(entry, &tagtype) == -1)
4080 if (sys_acl_get_permset(entry, &permset) == -1)
4086 case SMB_ACL_USER_OBJ:
4087 perms = unix_perms_to_acl_perms(mode, S_IRUSR, S_IWUSR, S_IXUSR);
4089 case SMB_ACL_GROUP_OBJ:
4090 perms = unix_perms_to_acl_perms(mode, S_IRGRP, S_IWGRP, S_IXGRP);
4094 * FIXME: The ACL_MASK entry permissions should really be set to
4095 * the union of the permissions of all ACL_USER,
4096 * ACL_GROUP_OBJ, and ACL_GROUP entries. That's what
4097 * acl_calc_mask() does, but Samba ACLs doesn't provide it.
4099 perms = S_IRUSR|S_IWUSR|S_IXUSR;
4102 perms = unix_perms_to_acl_perms(mode, S_IROTH, S_IWOTH, S_IXOTH);
4108 if (map_acl_perms_to_permset(perms, &permset) == -1)
4111 if (sys_acl_set_permset(entry, permset) == -1)
4116 * If this is a simple 3 element ACL or no elements then it's a standard
4117 * UNIX permission set. Just use chmod...
4120 if ((num_entries == 3) || (num_entries == 0))
4126 /****************************************************************************
4127 Get the access ACL of FROM, do a chmod by setting the ACL USER_OBJ,
4128 GROUP_OBJ and OTHER bits in an ACL and set the mask to rwx. Set the
4129 resulting ACL on TO. Note that name is in UNIX character set.
4130 ****************************************************************************/
4132 static int copy_access_posix_acl(connection_struct *conn,
4133 const struct smb_filename *smb_fname_from,
4134 const struct smb_filename *smb_fname_to,
4137 SMB_ACL_T posix_acl = NULL;
4140 if ((posix_acl = SMB_VFS_SYS_ACL_GET_FILE(conn, smb_fname_from,
4141 SMB_ACL_TYPE_ACCESS,
4142 talloc_tos())) == NULL)
4145 if ((ret = chmod_acl_internals(conn, posix_acl, mode)) == -1)
4148 ret = SMB_VFS_SYS_ACL_SET_FILE(conn, smb_fname_to,
4149 SMB_ACL_TYPE_ACCESS, posix_acl);
4153 TALLOC_FREE(posix_acl);
4157 /****************************************************************************
4158 Check for an existing default POSIX ACL on a directory.
4159 ****************************************************************************/
4161 static bool directory_has_default_posix_acl(connection_struct *conn,
4162 const struct smb_filename *smb_fname)
4164 SMB_ACL_T def_acl = SMB_VFS_SYS_ACL_GET_FILE(conn, smb_fname,
4165 SMB_ACL_TYPE_DEFAULT,
4167 bool has_acl = False;
4168 SMB_ACL_ENTRY_T entry;
4170 if (def_acl != NULL && (sys_acl_get_entry(def_acl, SMB_ACL_FIRST_ENTRY, &entry) == 1)) {
4175 TALLOC_FREE(def_acl);
4180 /****************************************************************************
4181 If the parent directory has no default ACL but it does have an Access ACL,
4182 inherit this Access ACL to file name.
4183 ****************************************************************************/
4185 int inherit_access_posix_acl(connection_struct *conn,
4186 struct smb_filename *inherit_from_dir,
4187 const struct smb_filename *smb_fname,
4190 if (directory_has_default_posix_acl(conn, inherit_from_dir))
4193 return copy_access_posix_acl(conn, inherit_from_dir, smb_fname, mode);
4196 /****************************************************************************
4197 Map from wire type to permset.
4198 ****************************************************************************/
4200 static bool unix_ex_wire_to_permset(connection_struct *conn, unsigned char wire_perm, SMB_ACL_PERMSET_T *p_permset)
4202 if (wire_perm & ~(SMB_POSIX_ACL_READ|SMB_POSIX_ACL_WRITE|SMB_POSIX_ACL_EXECUTE)) {
4206 if (sys_acl_clear_perms(*p_permset) == -1) {
4210 if (wire_perm & SMB_POSIX_ACL_READ) {
4211 if (sys_acl_add_perm(*p_permset, SMB_ACL_READ) == -1) {
4215 if (wire_perm & SMB_POSIX_ACL_WRITE) {
4216 if (sys_acl_add_perm(*p_permset, SMB_ACL_WRITE) == -1) {
4220 if (wire_perm & SMB_POSIX_ACL_EXECUTE) {
4221 if (sys_acl_add_perm(*p_permset, SMB_ACL_EXECUTE) == -1) {
4228 /****************************************************************************
4229 Map from wire type to tagtype.
4230 ****************************************************************************/
4232 static bool unix_ex_wire_to_tagtype(unsigned char wire_tt, SMB_ACL_TAG_T *p_tt)
4235 case SMB_POSIX_ACL_USER_OBJ:
4236 *p_tt = SMB_ACL_USER_OBJ;
4238 case SMB_POSIX_ACL_USER:
4239 *p_tt = SMB_ACL_USER;
4241 case SMB_POSIX_ACL_GROUP_OBJ:
4242 *p_tt = SMB_ACL_GROUP_OBJ;
4244 case SMB_POSIX_ACL_GROUP:
4245 *p_tt = SMB_ACL_GROUP;
4247 case SMB_POSIX_ACL_MASK:
4248 *p_tt = SMB_ACL_MASK;
4250 case SMB_POSIX_ACL_OTHER:
4251 *p_tt = SMB_ACL_OTHER;
4259 /****************************************************************************
4260 Create a new POSIX acl from wire permissions.
4261 FIXME ! How does the share mask/mode fit into this.... ?
4262 ****************************************************************************/
4264 static SMB_ACL_T create_posix_acl_from_wire(connection_struct *conn,
4267 TALLOC_CTX *mem_ctx)
4270 SMB_ACL_T the_acl = sys_acl_init(mem_ctx);
4272 if (the_acl == NULL) {
4276 for (i = 0; i < num_acls; i++) {
4277 SMB_ACL_ENTRY_T the_entry;
4278 SMB_ACL_PERMSET_T the_permset;
4279 SMB_ACL_TAG_T tag_type;
4281 if (sys_acl_create_entry(&the_acl, &the_entry) == -1) {
4282 DEBUG(0,("create_posix_acl_from_wire: Failed to create entry %u. (%s)\n",
4283 i, strerror(errno) ));
4287 if (!unix_ex_wire_to_tagtype(CVAL(pdata,(i*SMB_POSIX_ACL_ENTRY_SIZE)), &tag_type)) {
4288 DEBUG(0,("create_posix_acl_from_wire: invalid wire tagtype %u on entry %u.\n",
4289 CVAL(pdata,(i*SMB_POSIX_ACL_ENTRY_SIZE)), i ));
4293 if (sys_acl_set_tag_type(the_entry, tag_type) == -1) {
4294 DEBUG(0,("create_posix_acl_from_wire: Failed to set tagtype on entry %u. (%s)\n",
4295 i, strerror(errno) ));
4299 /* Get the permset pointer from the new ACL entry. */
4300 if (sys_acl_get_permset(the_entry, &the_permset) == -1) {
4301 DEBUG(0,("create_posix_acl_from_wire: Failed to get permset on entry %u. (%s)\n",
4302 i, strerror(errno) ));
4306 /* Map from wire to permissions. */
4307 if (!unix_ex_wire_to_permset(conn, CVAL(pdata,(i*SMB_POSIX_ACL_ENTRY_SIZE)+1), &the_permset)) {
4308 DEBUG(0,("create_posix_acl_from_wire: invalid permset %u on entry %u.\n",
4309 CVAL(pdata,(i*SMB_POSIX_ACL_ENTRY_SIZE) + 1), i ));
4313 /* Now apply to the new ACL entry. */
4314 if (sys_acl_set_permset(the_entry, the_permset) == -1) {
4315 DEBUG(0,("create_posix_acl_from_wire: Failed to add permset on entry %u. (%s)\n",
4316 i, strerror(errno) ));
4320 if (tag_type == SMB_ACL_USER) {
4321 uint32_t uidval = IVAL(pdata,(i*SMB_POSIX_ACL_ENTRY_SIZE)+2);
4322 uid_t uid = (uid_t)uidval;
4323 if (sys_acl_set_qualifier(the_entry,(void *)&uid) == -1) {
4324 DEBUG(0,("create_posix_acl_from_wire: Failed to set uid %u on entry %u. (%s)\n",
4325 (unsigned int)uid, i, strerror(errno) ));
4330 if (tag_type == SMB_ACL_GROUP) {
4331 uint32_t gidval = IVAL(pdata,(i*SMB_POSIX_ACL_ENTRY_SIZE)+2);
4332 gid_t gid = (uid_t)gidval;
4333 if (sys_acl_set_qualifier(the_entry,(void *)&gid) == -1) {
4334 DEBUG(0,("create_posix_acl_from_wire: Failed to set gid %u on entry %u. (%s)\n",
4335 (unsigned int)gid, i, strerror(errno) ));
4345 if (the_acl != NULL) {
4346 TALLOC_FREE(the_acl);
4351 /****************************************************************************
4352 Calls from UNIX extensions - Default POSIX ACL set.
4353 If num_def_acls == 0 and not a directory just return. If it is a directory
4354 and num_def_acls == 0 then remove the default acl. Else set the default acl
4356 ****************************************************************************/
4358 NTSTATUS set_unix_posix_default_acl(connection_struct *conn,
4360 uint16_t num_def_acls,
4363 SMB_ACL_T def_acl = NULL;
4367 if (!fsp->fsp_flags.is_directory) {
4368 return NT_STATUS_INVALID_HANDLE;
4371 if (!num_def_acls) {
4372 /* Remove the default ACL. */
4373 ret = SMB_VFS_SYS_ACL_DELETE_DEF_FILE(conn, fsp->fsp_name);
4375 status = map_nt_error_from_unix(errno);
4376 DBG_INFO("acl_delete_def_file failed on "
4377 "directory %s (%s)\n",
4382 return NT_STATUS_OK;
4385 def_acl = create_posix_acl_from_wire(conn,
4389 if (def_acl == NULL) {
4390 return map_nt_error_from_unix(errno);
4393 ret = SMB_VFS_SYS_ACL_SET_FILE(conn,
4395 SMB_ACL_TYPE_DEFAULT,
4398 status = map_nt_error_from_unix(errno);
4399 DBG_INFO("acl_set_file failed on directory %s (%s)\n",
4402 TALLOC_FREE(def_acl);
4406 DBG_DEBUG("set default acl for file %s\n",
4408 TALLOC_FREE(def_acl);
4409 return NT_STATUS_OK;
4412 /****************************************************************************
4413 Remove an ACL from a file. As we don't have acl_delete_entry() available
4414 we must read the current acl and copy all entries except MASK, USER and GROUP
4415 to a new acl, then set that. This (at least on Linux) causes any ACL to be
4417 FIXME ! How does the share mask/mode fit into this.... ?
4418 ****************************************************************************/
4420 static NTSTATUS remove_posix_acl(connection_struct *conn,
4423 SMB_ACL_T file_acl = NULL;
4424 int entry_id = SMB_ACL_FIRST_ENTRY;
4425 SMB_ACL_ENTRY_T entry;
4426 /* Create a new ACL with only 3 entries, u/g/w. */
4427 SMB_ACL_T new_file_acl = NULL;
4428 SMB_ACL_ENTRY_T user_ent = NULL;
4429 SMB_ACL_ENTRY_T group_ent = NULL;
4430 SMB_ACL_ENTRY_T other_ent = NULL;
4434 new_file_acl = sys_acl_init(talloc_tos());
4435 if (new_file_acl == NULL) {
4436 status = map_nt_error_from_unix(errno);
4437 DBG_INFO("failed to init new ACL with 3 entries "
4438 "for file %s %s.\n",
4444 /* Now create the u/g/w entries. */
4445 ret = sys_acl_create_entry(&new_file_acl, &user_ent);
4447 status = map_nt_error_from_unix(errno);
4448 DBG_INFO("Failed to create user entry for file %s. (%s)\n",
4453 ret = sys_acl_set_tag_type(user_ent, SMB_ACL_USER_OBJ);
4455 status = map_nt_error_from_unix(errno);
4456 DBG_INFO("Failed to set user entry for file %s. (%s)\n",
4462 ret = sys_acl_create_entry(&new_file_acl, &group_ent);
4464 status = map_nt_error_from_unix(errno);
4465 DBG_INFO("Failed to create group entry for file %s. (%s)\n",
4470 ret = sys_acl_set_tag_type(group_ent, SMB_ACL_GROUP_OBJ);
4472 status = map_nt_error_from_unix(errno);
4473 DBG_INFO("Failed to set group entry for file %s. (%s)\n",
4479 ret = sys_acl_create_entry(&new_file_acl, &other_ent);
4481 status = map_nt_error_from_unix(errno);
4482 DBG_INFO("Failed to create other entry for file %s. (%s)\n",
4487 ret = sys_acl_set_tag_type(other_ent, SMB_ACL_OTHER);
4489 status = map_nt_error_from_unix(errno);
4490 DBG_INFO("Failed to set other entry for file %s. (%s)\n",
4496 /* Get the current file ACL. */
4497 file_acl = SMB_VFS_SYS_ACL_GET_FD(fsp, talloc_tos());
4499 if (file_acl == NULL) {
4500 status = map_nt_error_from_unix(errno);
4501 /* This is only returned if an error occurred. Even for a file with
4502 no acl a u/g/w acl should be returned. */
4503 DBG_INFO("failed to get ACL from file %s (%s).\n",
4509 while ( sys_acl_get_entry(file_acl, entry_id, &entry) == 1) {
4510 SMB_ACL_TAG_T tagtype;
4511 SMB_ACL_PERMSET_T permset;
4513 entry_id = SMB_ACL_NEXT_ENTRY;
4515 ret = sys_acl_get_tag_type(entry, &tagtype);
4517 status = map_nt_error_from_unix(errno);
4518 DBG_INFO("failed to get tagtype from ACL "
4519 "on file %s (%s).\n",
4525 ret = sys_acl_get_permset(entry, &permset);
4527 status = map_nt_error_from_unix(errno);
4528 DBG_INFO("failed to get permset from ACL "
4529 "on file %s (%s).\n",
4535 if (tagtype == SMB_ACL_USER_OBJ) {
4536 ret = sys_acl_set_permset(user_ent, permset);
4538 status = map_nt_error_from_unix(errno);
4539 DBG_INFO("failed to set permset from ACL "
4540 "on file %s (%s).\n",
4545 } else if (tagtype == SMB_ACL_GROUP_OBJ) {
4546 ret = sys_acl_set_permset(group_ent, permset);
4548 status = map_nt_error_from_unix(errno);
4549 DBG_INFO("failed to set permset from ACL "
4550 "on file %s (%s).\n",
4555 } else if (tagtype == SMB_ACL_OTHER) {
4556 ret = sys_acl_set_permset(other_ent, permset);
4558 status = map_nt_error_from_unix(errno);
4559 DBG_INFO("failed to set permset from ACL "
4560 "on file %s (%s).\n",
4568 /* Set the new empty file ACL. */
4569 ret = SMB_VFS_SYS_ACL_SET_FD(fsp, new_file_acl);
4571 status = map_nt_error_from_unix(errno);
4572 DBG_INFO("acl_set_file failed on %s (%s)\n",
4578 status = NT_STATUS_OK;
4582 TALLOC_FREE(file_acl);
4583 TALLOC_FREE(new_file_acl);
4587 /****************************************************************************
4588 Calls from UNIX extensions - POSIX ACL set.
4589 If num_def_acls == 0 then read/modify/write acl after removing all entries
4590 except SMB_ACL_USER_OBJ, SMB_ACL_GROUP_OBJ, SMB_ACL_OTHER.
4591 ****************************************************************************/
4593 NTSTATUS set_unix_posix_acl(connection_struct *conn,
4598 SMB_ACL_T file_acl = NULL;
4603 /* Remove the ACL from the file. */
4604 return remove_posix_acl(conn, fsp);
4607 file_acl = create_posix_acl_from_wire(conn,
4611 if (file_acl == NULL) {
4612 return map_nt_error_from_unix(errno);
4615 ret = SMB_VFS_SYS_ACL_SET_FD(fsp, file_acl);
4617 status = map_nt_error_from_unix(errno);
4618 DBG_INFO("acl_set_file failed on %s (%s)\n",
4621 TALLOC_FREE(file_acl);
4625 DBG_DEBUG("set acl for file %s\n",
4628 TALLOC_FREE(file_acl);
4629 return NT_STATUS_OK;
4632 int posix_sys_acl_blob_get_file(vfs_handle_struct *handle,
4633 const struct smb_filename *smb_fname_in,
4634 TALLOC_CTX *mem_ctx,
4635 char **blob_description,
4639 TALLOC_CTX *frame = talloc_stackframe();
4640 /* Initialise this to zero, in a portable way */
4641 struct smb_acl_wrapper acl_wrapper = {
4644 struct smb_filename *smb_fname = cp_smb_filename_nostream(frame,
4646 if (smb_fname == NULL) {
4652 acl_wrapper.access_acl
4653 = smb_vfs_call_sys_acl_get_file(handle,
4655 SMB_ACL_TYPE_ACCESS,
4658 ret = smb_vfs_call_stat(handle, smb_fname);
4664 if (S_ISDIR(smb_fname->st.st_ex_mode)) {
4665 acl_wrapper.default_acl
4666 = smb_vfs_call_sys_acl_get_file(handle,
4668 SMB_ACL_TYPE_DEFAULT,
4672 acl_wrapper.owner = smb_fname->st.st_ex_uid;
4673 acl_wrapper.group = smb_fname->st.st_ex_gid;
4674 acl_wrapper.mode = smb_fname->st.st_ex_mode;
4676 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_push_struct_blob(blob, mem_ctx,
4678 (ndr_push_flags_fn_t)ndr_push_smb_acl_wrapper))) {
4684 *blob_description = talloc_strdup(mem_ctx, "posix_acl");
4685 if (!*blob_description) {
4695 int posix_sys_acl_blob_get_fd(vfs_handle_struct *handle,
4697 TALLOC_CTX *mem_ctx,
4698 char **blob_description,
4701 SMB_STRUCT_STAT sbuf;
4703 struct smb_acl_wrapper acl_wrapper;
4706 /* This ensures that we also consider the default ACL */
4707 if (fsp->fsp_flags.is_directory || fsp->fh->fd == -1) {
4708 return posix_sys_acl_blob_get_file(handle,
4714 frame = talloc_stackframe();
4716 acl_wrapper.default_acl = NULL;
4718 acl_wrapper.access_acl = smb_vfs_call_sys_acl_get_file(handle,
4720 SMB_ACL_TYPE_ACCESS,
4723 ret = smb_vfs_call_fstat(handle, fsp, &sbuf);
4729 acl_wrapper.owner = sbuf.st_ex_uid;
4730 acl_wrapper.group = sbuf.st_ex_gid;
4731 acl_wrapper.mode = sbuf.st_ex_mode;
4733 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_push_struct_blob(blob, mem_ctx,
4735 (ndr_push_flags_fn_t)ndr_push_smb_acl_wrapper))) {
4741 *blob_description = talloc_strdup(mem_ctx, "posix_acl");
4742 if (!*blob_description) {
4752 static NTSTATUS make_default_acl_posix(TALLOC_CTX *ctx,
4754 const SMB_STRUCT_STAT *psbuf,
4755 struct security_descriptor **ppdesc)
4757 struct dom_sid owner_sid, group_sid;
4759 struct security_ace aces[4];
4760 uint32_t access_mask = 0;
4761 mode_t mode = psbuf->st_ex_mode;
4762 struct security_acl *new_dacl = NULL;
4765 DBG_DEBUG("file %s mode = 0%o\n",name, (int)mode);
4767 uid_to_sid(&owner_sid, psbuf->st_ex_uid);
4768 gid_to_sid(&group_sid, psbuf->st_ex_gid);
4771 We provide up to 4 ACEs
4778 if (mode & S_IRUSR) {
4779 if (mode & S_IWUSR) {
4780 access_mask |= SEC_RIGHTS_FILE_ALL;
4782 access_mask |= SEC_RIGHTS_FILE_READ | SEC_FILE_EXECUTE;
4785 if (mode & S_IWUSR) {
4786 access_mask |= SEC_RIGHTS_FILE_WRITE | SEC_STD_DELETE;
4789 init_sec_ace(&aces[idx],
4791 SEC_ACE_TYPE_ACCESS_ALLOWED,
4797 if (mode & S_IRGRP) {
4798 access_mask |= SEC_RIGHTS_FILE_READ | SEC_FILE_EXECUTE;
4800 if (mode & S_IWGRP) {
4801 /* note that delete is not granted - this matches posix behaviour */
4802 access_mask |= SEC_RIGHTS_FILE_WRITE;
4805 init_sec_ace(&aces[idx],
4807 SEC_ACE_TYPE_ACCESS_ALLOWED,
4814 if (mode & S_IROTH) {
4815 access_mask |= SEC_RIGHTS_FILE_READ | SEC_FILE_EXECUTE;
4817 if (mode & S_IWOTH) {
4818 access_mask |= SEC_RIGHTS_FILE_WRITE;
4821 init_sec_ace(&aces[idx],
4823 SEC_ACE_TYPE_ACCESS_ALLOWED,
4829 init_sec_ace(&aces[idx],
4831 SEC_ACE_TYPE_ACCESS_ALLOWED,
4832 SEC_RIGHTS_FILE_ALL,
4836 new_dacl = make_sec_acl(ctx,
4842 return NT_STATUS_NO_MEMORY;
4845 *ppdesc = make_sec_desc(ctx,
4846 SECURITY_DESCRIPTOR_REVISION_1,
4847 SEC_DESC_SELF_RELATIVE|SEC_DESC_DACL_PRESENT,
4854 return NT_STATUS_NO_MEMORY;
4856 return NT_STATUS_OK;
4859 static NTSTATUS make_default_acl_windows(TALLOC_CTX *ctx,
4861 const SMB_STRUCT_STAT *psbuf,
4862 struct security_descriptor **ppdesc)
4864 struct dom_sid owner_sid, group_sid;
4866 struct security_ace aces[4];
4867 uint32_t access_mask = 0;
4868 mode_t mode = psbuf->st_ex_mode;
4869 struct security_acl *new_dacl = NULL;
4872 DBG_DEBUG("file [%s] mode [0%o]\n", name, (int)mode);
4874 uid_to_sid(&owner_sid, psbuf->st_ex_uid);
4875 gid_to_sid(&group_sid, psbuf->st_ex_gid);
4878 * We provide 2 ACEs:
4883 if (mode & S_IRUSR) {
4884 if (mode & S_IWUSR) {
4885 access_mask |= SEC_RIGHTS_FILE_ALL;
4887 access_mask |= SEC_RIGHTS_FILE_READ | SEC_FILE_EXECUTE;
4890 if (mode & S_IWUSR) {
4891 access_mask |= SEC_RIGHTS_FILE_WRITE | SEC_STD_DELETE;
4894 init_sec_ace(&aces[idx],
4896 SEC_ACE_TYPE_ACCESS_ALLOWED,
4901 init_sec_ace(&aces[idx],
4903 SEC_ACE_TYPE_ACCESS_ALLOWED,
4904 SEC_RIGHTS_FILE_ALL,
4908 new_dacl = make_sec_acl(ctx,
4914 return NT_STATUS_NO_MEMORY;
4917 *ppdesc = make_sec_desc(ctx,
4918 SECURITY_DESCRIPTOR_REVISION_1,
4919 SEC_DESC_SELF_RELATIVE|SEC_DESC_DACL_PRESENT,
4926 return NT_STATUS_NO_MEMORY;
4928 return NT_STATUS_OK;
4931 static NTSTATUS make_default_acl_everyone(TALLOC_CTX *ctx,
4933 const SMB_STRUCT_STAT *psbuf,
4934 struct security_descriptor **ppdesc)
4936 struct dom_sid owner_sid, group_sid;
4938 struct security_ace aces[1];
4939 mode_t mode = psbuf->st_ex_mode;
4940 struct security_acl *new_dacl = NULL;
4943 DBG_DEBUG("file [%s] mode [0%o]\n", name, (int)mode);
4945 uid_to_sid(&owner_sid, psbuf->st_ex_uid);
4946 gid_to_sid(&group_sid, psbuf->st_ex_gid);
4949 * We provide one ACEs: full access for everyone
4952 init_sec_ace(&aces[idx],
4954 SEC_ACE_TYPE_ACCESS_ALLOWED,
4955 SEC_RIGHTS_FILE_ALL,
4959 new_dacl = make_sec_acl(ctx,
4965 return NT_STATUS_NO_MEMORY;
4968 *ppdesc = make_sec_desc(ctx,
4969 SECURITY_DESCRIPTOR_REVISION_1,
4970 SEC_DESC_SELF_RELATIVE|SEC_DESC_DACL_PRESENT,
4977 return NT_STATUS_NO_MEMORY;
4979 return NT_STATUS_OK;
4982 static const struct enum_list default_acl_style_list[] = {
4983 {DEFAULT_ACL_POSIX, "posix"},
4984 {DEFAULT_ACL_WINDOWS, "windows"},
4985 {DEFAULT_ACL_EVERYONE, "everyone"},
4988 const struct enum_list *get_default_acl_style_list(void)
4990 return default_acl_style_list;
4993 NTSTATUS make_default_filesystem_acl(
4995 enum default_acl_style acl_style,
4997 const SMB_STRUCT_STAT *psbuf,
4998 struct security_descriptor **ppdesc)
5002 switch (acl_style) {
5003 case DEFAULT_ACL_POSIX:
5004 status = make_default_acl_posix(ctx, name, psbuf, ppdesc);
5007 case DEFAULT_ACL_WINDOWS:
5008 status = make_default_acl_windows(ctx, name, psbuf, ppdesc);
5011 case DEFAULT_ACL_EVERYONE:
5012 status = make_default_acl_everyone(ctx, name, psbuf, ppdesc);
5016 DBG_ERR("unknown acl style %d", acl_style);
5017 status = NT_STATUS_INTERNAL_ERROR;