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
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it under the terms of the GNU General Public License as published by
10
the Free Software Foundation; either version 3 of the License, or
11
(at your option) any later version.
13
This program is distributed in the hope that it will be useful,
14
but WITHOUT ANY WARRANTY; without even the implied warranty of
15
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16
GNU General Public License for more details.
18
You should have received a copy of the GNU General Public License
19
along with this program. If not, see <http://www.gnu.org/licenses/>.
24
extern struct current_user current_user;
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extern const struct generic_mapping file_generic_mapping;
28
#define DBGC_CLASS DBGC_ACLS
30
/****************************************************************************
31
Data structures representing the internal ACE format.
32
****************************************************************************/
34
enum ace_owner {UID_ACE, GID_ACE, WORLD_ACE};
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enum ace_attribute {ALLOW_ACE, DENY_ACE}; /* Used for incoming NT ACLS. */
37
typedef union posix_id {
43
typedef struct canon_ace {
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struct canon_ace *next, *prev;
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mode_t perms; /* Only use S_I(R|W|X)USR mode bits here. */
48
enum ace_owner owner_type;
49
enum ace_attribute attr;
51
uint8_t ace_flags; /* From windows ACE entry. */
54
#define ALL_ACE_PERMS (S_IRUSR|S_IWUSR|S_IXUSR)
57
* EA format of user.SAMBA_PAI (Samba_Posix_Acl_Interitance)
58
* attribute on disk - version 1.
59
* All values are little endian.
61
* | 1 | 1 | 2 | 2 | ....
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* +------+------+-------------+---------------------+-------------+--------------------+
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* | vers | flag | num_entries | num_default_entries | ..entries.. | default_entries... |
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* +------+------+-------------+---------------------+-------------+--------------------+
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* +------+-------------------+
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* | value| uid/gid or world |
72
* +------+-------------------+
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* Version 2 format. Stores extra Windows metadata about an ACL.
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* | 1 | 2 | 2 | 2 | ....
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* +------+----------+-------------+---------------------+-------------+--------------------+
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* | vers | ace | num_entries | num_default_entries | ..entries.. | default_entries... |
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* | 2 | type | | | | |
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* +------+----------+-------------+---------------------+-------------+--------------------+
85
* +------+------+-------------------+
86
* | ace | value| uid/gid or world |
87
* | flag | type | value |
88
* +------+-------------------+------+
92
#define PAI_VERSION_OFFSET 0
94
#define PAI_V1_FLAG_OFFSET 1
95
#define PAI_V1_NUM_ENTRIES_OFFSET 2
96
#define PAI_V1_NUM_DEFAULT_ENTRIES_OFFSET 4
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#define PAI_V1_ENTRIES_BASE 6
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#define PAI_V1_ACL_FLAG_PROTECTED 0x1
99
#define PAI_V1_ENTRY_LENGTH 5
101
#define PAI_V1_VERSION 1
103
#define PAI_V2_TYPE_OFFSET 1
104
#define PAI_V2_NUM_ENTRIES_OFFSET 3
105
#define PAI_V2_NUM_DEFAULT_ENTRIES_OFFSET 5
106
#define PAI_V2_ENTRIES_BASE 7
107
#define PAI_V2_ENTRY_LENGTH 6
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#define PAI_V2_VERSION 2
112
* In memory format of user.SAMBA_PAI attribute.
116
struct pai_entry *next, *prev;
118
enum ace_owner owner_type;
124
unsigned int num_entries;
125
struct pai_entry *entry_list;
126
unsigned int num_def_entries;
127
struct pai_entry *def_entry_list;
130
/************************************************************************
131
Return a uint32 of the pai_entry principal.
132
************************************************************************/
134
static uint32_t get_pai_entry_val(struct pai_entry *paie)
136
switch (paie->owner_type) {
138
DEBUG(10,("get_pai_entry_val: uid = %u\n", (unsigned int)paie->unix_ug.uid ));
139
return (uint32_t)paie->unix_ug.uid;
141
DEBUG(10,("get_pai_entry_val: gid = %u\n", (unsigned int)paie->unix_ug.gid ));
142
return (uint32_t)paie->unix_ug.gid;
145
DEBUG(10,("get_pai_entry_val: world ace\n"));
150
/************************************************************************
151
Return a uint32 of the entry principal.
152
************************************************************************/
154
static uint32_t get_entry_val(canon_ace *ace_entry)
156
switch (ace_entry->owner_type) {
158
DEBUG(10,("get_entry_val: uid = %u\n", (unsigned int)ace_entry->unix_ug.uid ));
159
return (uint32_t)ace_entry->unix_ug.uid;
161
DEBUG(10,("get_entry_val: gid = %u\n", (unsigned int)ace_entry->unix_ug.gid ));
162
return (uint32_t)ace_entry->unix_ug.gid;
165
DEBUG(10,("get_entry_val: world ace\n"));
170
/************************************************************************
171
Create the on-disk format (always v2 now). Caller must free.
172
************************************************************************/
174
static char *create_pai_buf_v2(canon_ace *file_ace_list,
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canon_ace *dir_ace_list,
179
char *pai_buf = NULL;
180
canon_ace *ace_list = NULL;
181
char *entry_offset = NULL;
182
unsigned int num_entries = 0;
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unsigned int num_def_entries = 0;
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for (ace_list = file_ace_list; ace_list; ace_list = ace_list->next) {
190
for (ace_list = dir_ace_list; ace_list; ace_list = ace_list->next) {
194
DEBUG(10,("create_pai_buf_v2: num_entries = %u, num_def_entries = %u\n", num_entries, num_def_entries ));
196
*store_size = PAI_V2_ENTRIES_BASE +
197
((num_entries + num_def_entries)*PAI_V2_ENTRY_LENGTH);
199
pai_buf = (char *)SMB_MALLOC(*store_size);
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/* Set up the header. */
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memset(pai_buf, '\0', PAI_V2_ENTRIES_BASE);
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SCVAL(pai_buf,PAI_VERSION_OFFSET,PAI_V2_VERSION);
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SSVAL(pai_buf,PAI_V2_TYPE_OFFSET, sd_type);
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SSVAL(pai_buf,PAI_V2_NUM_ENTRIES_OFFSET,num_entries);
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SSVAL(pai_buf,PAI_V2_NUM_DEFAULT_ENTRIES_OFFSET,num_def_entries);
211
DEBUG(10,("create_pai_buf_v2: sd_type = 0x%x\n",
212
(unsigned int)sd_type ));
214
entry_offset = pai_buf + PAI_V2_ENTRIES_BASE;
217
for (ace_list = file_ace_list; ace_list; ace_list = ace_list->next) {
218
uint8_t type_val = (uint8_t)ace_list->owner_type;
219
uint32_t entry_val = get_entry_val(ace_list);
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SCVAL(entry_offset,0,ace_list->ace_flags);
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SCVAL(entry_offset,1,type_val);
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SIVAL(entry_offset,2,entry_val);
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DEBUG(10,("create_pai_buf_v2: entry %u [0x%x] [0x%x] [0x%x]\n",
226
(unsigned int)ace_list->ace_flags,
227
(unsigned int)type_val,
228
(unsigned int)entry_val ));
230
entry_offset += PAI_V2_ENTRY_LENGTH;
233
for (ace_list = dir_ace_list; ace_list; ace_list = ace_list->next) {
234
uint8_t type_val = (uint8_t)ace_list->owner_type;
235
uint32_t entry_val = get_entry_val(ace_list);
237
SCVAL(entry_offset,0,ace_list->ace_flags);
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SCVAL(entry_offset,1,type_val);
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SIVAL(entry_offset,2,entry_val);
240
DEBUG(10,("create_pai_buf_v2: entry %u [0x%x] [0x%x] [0x%x]\n",
242
(unsigned int)ace_list->ace_flags,
243
(unsigned int)type_val,
244
(unsigned int)entry_val ));
246
entry_offset += PAI_V2_ENTRY_LENGTH;
252
/************************************************************************
253
Store the user.SAMBA_PAI attribute on disk.
254
************************************************************************/
256
static void store_inheritance_attributes(files_struct *fsp,
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canon_ace *file_ace_list,
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canon_ace *dir_ace_list,
265
if (!lp_map_acl_inherit(SNUM(fsp->conn))) {
269
pai_buf = create_pai_buf_v2(file_ace_list, dir_ace_list,
270
sd_type, &store_size);
272
if (fsp->fh->fd != -1) {
273
ret = SMB_VFS_FSETXATTR(fsp, SAMBA_POSIX_INHERITANCE_EA_NAME,
274
pai_buf, store_size, 0);
276
ret = SMB_VFS_SETXATTR(fsp->conn,fsp->fsp_name, SAMBA_POSIX_INHERITANCE_EA_NAME,
277
pai_buf, store_size, 0);
282
DEBUG(10,("store_inheritance_attribute: type 0x%x for file %s\n",
283
(unsigned int)sd_type,
286
if (ret == -1 && !no_acl_syscall_error(errno)) {
287
DEBUG(1,("store_inheritance_attribute: Error %s\n", strerror(errno) ));
291
/************************************************************************
292
Delete the in memory inheritance info.
293
************************************************************************/
295
static void free_inherited_info(struct pai_val *pal)
298
struct pai_entry *paie, *paie_next;
299
for (paie = pal->entry_list; paie; paie = paie_next) {
300
paie_next = paie->next;
303
for (paie = pal->def_entry_list; paie; paie = paie_next) {
304
paie_next = paie->next;
311
/************************************************************************
312
Get any stored ACE flags.
313
************************************************************************/
315
static uint16_t get_pai_flags(struct pai_val *pal, canon_ace *ace_entry, bool default_ace)
317
struct pai_entry *paie;
323
/* If the entry exists it is inherited. */
324
for (paie = (default_ace ? pal->def_entry_list : pal->entry_list); paie; paie = paie->next) {
325
if (ace_entry->owner_type == paie->owner_type &&
326
get_entry_val(ace_entry) == get_pai_entry_val(paie))
327
return paie->ace_flags;
332
/************************************************************************
333
Ensure an attribute just read is valid - v1.
334
************************************************************************/
336
static bool check_pai_ok_v1(const char *pai_buf, size_t pai_buf_data_size)
339
uint16 num_def_entries;
341
if (pai_buf_data_size < PAI_V1_ENTRIES_BASE) {
342
/* Corrupted - too small. */
346
if (CVAL(pai_buf,PAI_VERSION_OFFSET) != PAI_V1_VERSION) {
350
num_entries = SVAL(pai_buf,PAI_V1_NUM_ENTRIES_OFFSET);
351
num_def_entries = SVAL(pai_buf,PAI_V1_NUM_DEFAULT_ENTRIES_OFFSET);
353
/* Check the entry lists match. */
354
/* Each entry is 5 bytes (type plus 4 bytes of uid or gid). */
356
if (((num_entries + num_def_entries)*PAI_V1_ENTRY_LENGTH) +
357
PAI_V1_ENTRIES_BASE != pai_buf_data_size) {
364
/************************************************************************
365
Ensure an attribute just read is valid - v2.
366
************************************************************************/
368
static bool check_pai_ok_v2(const char *pai_buf, size_t pai_buf_data_size)
371
uint16 num_def_entries;
373
if (pai_buf_data_size < PAI_V2_ENTRIES_BASE) {
374
/* Corrupted - too small. */
378
if (CVAL(pai_buf,PAI_VERSION_OFFSET) != PAI_V2_VERSION) {
382
num_entries = SVAL(pai_buf,PAI_V2_NUM_ENTRIES_OFFSET);
383
num_def_entries = SVAL(pai_buf,PAI_V2_NUM_DEFAULT_ENTRIES_OFFSET);
385
/* Check the entry lists match. */
386
/* Each entry is 6 bytes (flags + type + 4 bytes of uid or gid). */
388
if (((num_entries + num_def_entries)*PAI_V2_ENTRY_LENGTH) +
389
PAI_V2_ENTRIES_BASE != pai_buf_data_size) {
396
/************************************************************************
398
************************************************************************/
400
static bool get_pai_owner_type(struct pai_entry *paie, const char *entry_offset)
402
paie->owner_type = (enum ace_owner)CVAL(entry_offset,0);
403
switch( paie->owner_type) {
405
paie->unix_ug.uid = (uid_t)IVAL(entry_offset,1);
406
DEBUG(10,("get_pai_owner_type: uid = %u\n",
407
(unsigned int)paie->unix_ug.uid ));
410
paie->unix_ug.gid = (gid_t)IVAL(entry_offset,1);
411
DEBUG(10,("get_pai_owner_type: gid = %u\n",
412
(unsigned int)paie->unix_ug.gid ));
415
paie->unix_ug.world = -1;
416
DEBUG(10,("get_pai_owner_type: world ace\n"));
419
DEBUG(10,("get_pai_owner_type: unknown type %u\n",
420
(unsigned int)paie->owner_type ));
426
/************************************************************************
428
************************************************************************/
430
static const char *create_pai_v1_entries(struct pai_val *paiv,
431
const char *entry_offset,
436
for (i = 0; i < paiv->num_entries; i++) {
437
struct pai_entry *paie = SMB_MALLOC_P(struct pai_entry);
442
paie->ace_flags = SEC_ACE_FLAG_INHERITED_ACE;
443
if (!get_pai_owner_type(paie, entry_offset)) {
448
DLIST_ADD(paiv->entry_list, paie);
450
DLIST_ADD(paiv->def_entry_list, paie);
452
entry_offset += PAI_V1_ENTRY_LENGTH;
457
/************************************************************************
458
Convert to in-memory format from version 1.
459
************************************************************************/
461
static struct pai_val *create_pai_val_v1(const char *buf, size_t size)
463
const char *entry_offset;
464
struct pai_val *paiv = NULL;
466
if (!check_pai_ok_v1(buf, size)) {
470
paiv = SMB_MALLOC_P(struct pai_val);
475
memset(paiv, '\0', sizeof(struct pai_val));
477
paiv->sd_type = (CVAL(buf,PAI_V1_FLAG_OFFSET) == PAI_V1_ACL_FLAG_PROTECTED) ?
478
SE_DESC_DACL_PROTECTED : 0;
480
paiv->num_entries = SVAL(buf,PAI_V1_NUM_ENTRIES_OFFSET);
481
paiv->num_def_entries = SVAL(buf,PAI_V1_NUM_DEFAULT_ENTRIES_OFFSET);
483
entry_offset = buf + PAI_V1_ENTRIES_BASE;
485
DEBUG(10,("create_pai_val: num_entries = %u, num_def_entries = %u\n",
486
paiv->num_entries, paiv->num_def_entries ));
488
entry_offset = create_pai_v1_entries(paiv, entry_offset, false);
489
if (entry_offset == NULL) {
490
free_inherited_info(paiv);
493
entry_offset = create_pai_v1_entries(paiv, entry_offset, true);
494
if (entry_offset == NULL) {
495
free_inherited_info(paiv);
502
/************************************************************************
504
************************************************************************/
506
static const char *create_pai_v2_entries(struct pai_val *paiv,
507
unsigned int num_entries,
508
const char *entry_offset,
513
for (i = 0; i < num_entries; i++) {
514
struct pai_entry *paie = SMB_MALLOC_P(struct pai_entry);
519
paie->ace_flags = CVAL(entry_offset,0);
521
if (!get_pai_owner_type(paie, entry_offset+1)) {
525
DLIST_ADD(paiv->entry_list, paie);
527
DLIST_ADD(paiv->def_entry_list, paie);
529
entry_offset += PAI_V2_ENTRY_LENGTH;
534
/************************************************************************
535
Convert to in-memory format from version 2.
536
************************************************************************/
538
static struct pai_val *create_pai_val_v2(const char *buf, size_t size)
540
const char *entry_offset;
541
struct pai_val *paiv = NULL;
543
if (!check_pai_ok_v2(buf, size)) {
547
paiv = SMB_MALLOC_P(struct pai_val);
552
memset(paiv, '\0', sizeof(struct pai_val));
554
paiv->sd_type = SVAL(buf,PAI_V2_TYPE_OFFSET);
556
paiv->num_entries = SVAL(buf,PAI_V2_NUM_ENTRIES_OFFSET);
557
paiv->num_def_entries = SVAL(buf,PAI_V2_NUM_DEFAULT_ENTRIES_OFFSET);
559
entry_offset = buf + PAI_V2_ENTRIES_BASE;
561
DEBUG(10,("create_pai_val_v2: sd_type = 0x%x num_entries = %u, num_def_entries = %u\n",
562
(unsigned int)paiv->sd_type,
563
paiv->num_entries, paiv->num_def_entries ));
565
entry_offset = create_pai_v2_entries(paiv, paiv->num_entries,
566
entry_offset, false);
567
if (entry_offset == NULL) {
568
free_inherited_info(paiv);
571
entry_offset = create_pai_v2_entries(paiv, paiv->num_def_entries,
573
if (entry_offset == NULL) {
574
free_inherited_info(paiv);
581
/************************************************************************
582
Convert to in-memory format - from either version 1 or 2.
583
************************************************************************/
585
static struct pai_val *create_pai_val(const char *buf, size_t size)
590
if (CVAL(buf,PAI_VERSION_OFFSET) == PAI_V1_VERSION) {
591
return create_pai_val_v1(buf, size);
592
} else if (CVAL(buf,PAI_VERSION_OFFSET) == PAI_V2_VERSION) {
593
return create_pai_val_v2(buf, size);
599
/************************************************************************
600
Load the user.SAMBA_PAI attribute.
601
************************************************************************/
603
static struct pai_val *fload_inherited_info(files_struct *fsp)
606
size_t pai_buf_size = 1024;
607
struct pai_val *paiv = NULL;
610
if (!lp_map_acl_inherit(SNUM(fsp->conn))) {
614
if ((pai_buf = (char *)SMB_MALLOC(pai_buf_size)) == NULL) {
619
if (fsp->fh->fd != -1) {
620
ret = SMB_VFS_FGETXATTR(fsp, SAMBA_POSIX_INHERITANCE_EA_NAME,
621
pai_buf, pai_buf_size);
623
ret = SMB_VFS_GETXATTR(fsp->conn,fsp->fsp_name,SAMBA_POSIX_INHERITANCE_EA_NAME,
624
pai_buf, pai_buf_size);
628
if (errno != ERANGE) {
631
/* Buffer too small - enlarge it. */
634
if (pai_buf_size > 1024*1024) {
635
return NULL; /* Limit malloc to 1mb. */
637
if ((pai_buf = (char *)SMB_MALLOC(pai_buf_size)) == NULL)
642
DEBUG(10,("load_inherited_info: ret = %lu for file %s\n", (unsigned long)ret, fsp->fsp_name));
645
/* No attribute or not supported. */
647
if (errno != ENOATTR)
648
DEBUG(10,("load_inherited_info: Error %s\n", strerror(errno) ));
651
DEBUG(10,("load_inherited_info: Error %s\n", strerror(errno) ));
657
paiv = create_pai_val(pai_buf, ret);
660
DEBUG(10,("load_inherited_info: ACL type is 0x%x for file %s\n",
661
(unsigned int)paiv->sd_type,
669
/************************************************************************
670
Load the user.SAMBA_PAI attribute.
671
************************************************************************/
673
static struct pai_val *load_inherited_info(const struct connection_struct *conn,
677
size_t pai_buf_size = 1024;
678
struct pai_val *paiv = NULL;
681
if (!lp_map_acl_inherit(SNUM(conn))) {
685
if ((pai_buf = (char *)SMB_MALLOC(pai_buf_size)) == NULL) {
690
ret = SMB_VFS_GETXATTR(conn, fname,
691
SAMBA_POSIX_INHERITANCE_EA_NAME,
692
pai_buf, pai_buf_size);
695
if (errno != ERANGE) {
698
/* Buffer too small - enlarge it. */
701
if (pai_buf_size > 1024*1024) {
702
return NULL; /* Limit malloc to 1mb. */
704
if ((pai_buf = (char *)SMB_MALLOC(pai_buf_size)) == NULL)
709
DEBUG(10,("load_inherited_info: ret = %lu for file %s\n", (unsigned long)ret, fname));
712
/* No attribute or not supported. */
714
if (errno != ENOATTR)
715
DEBUG(10,("load_inherited_info: Error %s\n", strerror(errno) ));
718
DEBUG(10,("load_inherited_info: Error %s\n", strerror(errno) ));
724
paiv = create_pai_val(pai_buf, ret);
727
DEBUG(10,("load_inherited_info: ACL type 0x%x for file %s\n",
728
(unsigned int)paiv->sd_type,
736
/****************************************************************************
737
Functions to manipulate the internal ACE format.
738
****************************************************************************/
740
/****************************************************************************
741
Count a linked list of canonical ACE entries.
742
****************************************************************************/
744
static size_t count_canon_ace_list( canon_ace *l_head )
749
for (ace = l_head; ace; ace = ace->next)
755
/****************************************************************************
756
Free a linked list of canonical ACE entries.
757
****************************************************************************/
759
static void free_canon_ace_list( canon_ace *l_head )
761
canon_ace *list, *next;
763
for (list = l_head; list; list = next) {
765
DLIST_REMOVE(l_head, list);
770
/****************************************************************************
771
Function to duplicate a canon_ace entry.
772
****************************************************************************/
774
static canon_ace *dup_canon_ace( canon_ace *src_ace)
776
canon_ace *dst_ace = SMB_MALLOC_P(canon_ace);
782
dst_ace->prev = dst_ace->next = NULL;
786
/****************************************************************************
787
Print out a canon ace.
788
****************************************************************************/
790
static void print_canon_ace(canon_ace *pace, int num)
792
dbgtext( "canon_ace index %d. Type = %s ", num, pace->attr == ALLOW_ACE ? "allow" : "deny" );
793
dbgtext( "SID = %s ", sid_string_dbg(&pace->trustee));
794
if (pace->owner_type == UID_ACE) {
795
const char *u_name = uidtoname(pace->unix_ug.uid);
796
dbgtext( "uid %u (%s) ", (unsigned int)pace->unix_ug.uid, u_name );
797
} else if (pace->owner_type == GID_ACE) {
798
char *g_name = gidtoname(pace->unix_ug.gid);
799
dbgtext( "gid %u (%s) ", (unsigned int)pace->unix_ug.gid, g_name );
802
switch (pace->type) {
804
dbgtext( "SMB_ACL_USER ");
806
case SMB_ACL_USER_OBJ:
807
dbgtext( "SMB_ACL_USER_OBJ ");
810
dbgtext( "SMB_ACL_GROUP ");
812
case SMB_ACL_GROUP_OBJ:
813
dbgtext( "SMB_ACL_GROUP_OBJ ");
816
dbgtext( "SMB_ACL_OTHER ");
823
dbgtext( "ace_flags = 0x%x ", (unsigned int)pace->ace_flags);
825
dbgtext( "%c", pace->perms & S_IRUSR ? 'r' : '-');
826
dbgtext( "%c", pace->perms & S_IWUSR ? 'w' : '-');
827
dbgtext( "%c\n", pace->perms & S_IXUSR ? 'x' : '-');
830
/****************************************************************************
831
Print out a canon ace list.
832
****************************************************************************/
834
static void print_canon_ace_list(const char *name, canon_ace *ace_list)
838
if( DEBUGLVL( 10 )) {
839
dbgtext( "print_canon_ace_list: %s\n", name );
840
for (;ace_list; ace_list = ace_list->next, count++)
841
print_canon_ace(ace_list, count );
845
/****************************************************************************
846
Map POSIX ACL perms to canon_ace permissions (a mode_t containing only S_(R|W|X)USR bits).
847
****************************************************************************/
849
static mode_t convert_permset_to_mode_t(connection_struct *conn, SMB_ACL_PERMSET_T permset)
853
ret |= (SMB_VFS_SYS_ACL_GET_PERM(conn, permset, SMB_ACL_READ) ? S_IRUSR : 0);
854
ret |= (SMB_VFS_SYS_ACL_GET_PERM(conn, permset, SMB_ACL_WRITE) ? S_IWUSR : 0);
855
ret |= (SMB_VFS_SYS_ACL_GET_PERM(conn, permset, SMB_ACL_EXECUTE) ? S_IXUSR : 0);
860
/****************************************************************************
861
Map generic UNIX permissions to canon_ace permissions (a mode_t containing only S_(R|W|X)USR bits).
862
****************************************************************************/
864
static mode_t unix_perms_to_acl_perms(mode_t mode, int r_mask, int w_mask, int x_mask)
878
/****************************************************************************
879
Map canon_ace permissions (a mode_t containing only S_(R|W|X)USR bits) to
880
an SMB_ACL_PERMSET_T.
881
****************************************************************************/
883
static int map_acl_perms_to_permset(connection_struct *conn, mode_t mode, SMB_ACL_PERMSET_T *p_permset)
885
if (SMB_VFS_SYS_ACL_CLEAR_PERMS(conn, *p_permset) == -1)
887
if (mode & S_IRUSR) {
888
if (SMB_VFS_SYS_ACL_ADD_PERM(conn, *p_permset, SMB_ACL_READ) == -1)
891
if (mode & S_IWUSR) {
892
if (SMB_VFS_SYS_ACL_ADD_PERM(conn, *p_permset, SMB_ACL_WRITE) == -1)
895
if (mode & S_IXUSR) {
896
if (SMB_VFS_SYS_ACL_ADD_PERM(conn, *p_permset, SMB_ACL_EXECUTE) == -1)
902
/****************************************************************************
903
Function to create owner and group SIDs from a SMB_STRUCT_STAT.
904
****************************************************************************/
906
void create_file_sids(const SMB_STRUCT_STAT *psbuf, DOM_SID *powner_sid, DOM_SID *pgroup_sid)
908
uid_to_sid( powner_sid, psbuf->st_uid );
909
gid_to_sid( pgroup_sid, psbuf->st_gid );
912
/****************************************************************************
913
Is the identity in two ACEs equal ? Check both SID and uid/gid.
914
****************************************************************************/
916
static bool identity_in_ace_equal(canon_ace *ace1, canon_ace *ace2)
918
if (sid_equal(&ace1->trustee, &ace2->trustee)) {
921
if (ace1->owner_type == ace2->owner_type) {
922
if (ace1->owner_type == UID_ACE &&
923
ace1->unix_ug.uid == ace2->unix_ug.uid) {
925
} else if (ace1->owner_type == GID_ACE &&
926
ace1->unix_ug.gid == ace2->unix_ug.gid) {
933
/****************************************************************************
934
Merge aces with a common sid - if both are allow or deny, OR the permissions together and
935
delete the second one. If the first is deny, mask the permissions off and delete the allow
936
if the permissions become zero, delete the deny if the permissions are non zero.
937
****************************************************************************/
939
static void merge_aces( canon_ace **pp_list_head )
941
canon_ace *l_head = *pp_list_head;
942
canon_ace *curr_ace_outer;
943
canon_ace *curr_ace_outer_next;
946
* First, merge allow entries with identical SIDs, and deny entries
947
* with identical SIDs.
950
for (curr_ace_outer = l_head; curr_ace_outer; curr_ace_outer = curr_ace_outer_next) {
952
canon_ace *curr_ace_next;
954
curr_ace_outer_next = curr_ace_outer->next; /* Save the link in case we delete. */
956
for (curr_ace = curr_ace_outer->next; curr_ace; curr_ace = curr_ace_next) {
958
curr_ace_next = curr_ace->next; /* Save the link in case of delete. */
960
if (identity_in_ace_equal(curr_ace, curr_ace_outer) &&
961
(curr_ace->attr == curr_ace_outer->attr)) {
963
if( DEBUGLVL( 10 )) {
964
dbgtext("merge_aces: Merging ACE's\n");
965
print_canon_ace( curr_ace_outer, 0);
966
print_canon_ace( curr_ace, 0);
969
/* Merge two allow or two deny ACE's. */
971
curr_ace_outer->perms |= curr_ace->perms;
972
DLIST_REMOVE(l_head, curr_ace);
974
curr_ace_outer_next = curr_ace_outer->next; /* We may have deleted the link. */
980
* Now go through and mask off allow permissions with deny permissions.
981
* We can delete either the allow or deny here as we know that each SID
982
* appears only once in the list.
985
for (curr_ace_outer = l_head; curr_ace_outer; curr_ace_outer = curr_ace_outer_next) {
987
canon_ace *curr_ace_next;
989
curr_ace_outer_next = curr_ace_outer->next; /* Save the link in case we delete. */
991
for (curr_ace = curr_ace_outer->next; curr_ace; curr_ace = curr_ace_next) {
993
curr_ace_next = curr_ace->next; /* Save the link in case of delete. */
996
* Subtract ACE's with different entries. Due to the ordering constraints
997
* we've put on the ACL, we know the deny must be the first one.
1000
if (identity_in_ace_equal(curr_ace, curr_ace_outer) &&
1001
(curr_ace_outer->attr == DENY_ACE) && (curr_ace->attr == ALLOW_ACE)) {
1003
if( DEBUGLVL( 10 )) {
1004
dbgtext("merge_aces: Masking ACE's\n");
1005
print_canon_ace( curr_ace_outer, 0);
1006
print_canon_ace( curr_ace, 0);
1009
curr_ace->perms &= ~curr_ace_outer->perms;
1011
if (curr_ace->perms == 0) {
1014
* The deny overrides the allow. Remove the allow.
1017
DLIST_REMOVE(l_head, curr_ace);
1018
SAFE_FREE(curr_ace);
1019
curr_ace_outer_next = curr_ace_outer->next; /* We may have deleted the link. */
1024
* Even after removing permissions, there
1025
* are still allow permissions - delete the deny.
1026
* It is safe to delete the deny here,
1027
* as we are guarenteed by the deny first
1028
* ordering that all the deny entries for
1029
* this SID have already been merged into one
1030
* before we can get to an allow ace.
1033
DLIST_REMOVE(l_head, curr_ace_outer);
1034
SAFE_FREE(curr_ace_outer);
1039
} /* end for curr_ace */
1040
} /* end for curr_ace_outer */
1042
/* We may have modified the list. */
1044
*pp_list_head = l_head;
1047
/****************************************************************************
1048
Check if we need to return NT4.x compatible ACL entries.
1049
****************************************************************************/
1051
bool nt4_compatible_acls(void)
1053
int compat = lp_acl_compatibility();
1055
if (compat == ACL_COMPAT_AUTO) {
1056
enum remote_arch_types ra_type = get_remote_arch();
1058
/* Automatically adapt to client */
1059
return (ra_type <= RA_WINNT);
1061
return (compat == ACL_COMPAT_WINNT);
1065
/****************************************************************************
1066
Map canon_ace perms to permission bits NT.
1067
The attr element is not used here - we only process deny entries on set,
1068
not get. Deny entries are implicit on get with ace->perms = 0.
1069
****************************************************************************/
1071
static uint32_t map_canon_ace_perms(int snum,
1072
enum security_ace_type *pacl_type,
1076
uint32_t nt_mask = 0;
1078
*pacl_type = SEC_ACE_TYPE_ACCESS_ALLOWED;
1080
if (lp_acl_map_full_control(snum) && ((perms & ALL_ACE_PERMS) == ALL_ACE_PERMS)) {
1081
if (directory_ace) {
1082
nt_mask = UNIX_DIRECTORY_ACCESS_RWX;
1084
nt_mask = (UNIX_ACCESS_RWX & ~DELETE_ACCESS);
1086
} else if ((perms & ALL_ACE_PERMS) == (mode_t)0) {
1088
* Windows NT refuses to display ACEs with no permissions in them (but
1089
* they are perfectly legal with Windows 2000). If the ACE has empty
1090
* permissions we cannot use 0, so we use the otherwise unused
1091
* WRITE_OWNER permission, which we ignore when we set an ACL.
1092
* We abstract this into a #define of UNIX_ACCESS_NONE to allow this
1093
* to be changed in the future.
1096
if (nt4_compatible_acls())
1097
nt_mask = UNIX_ACCESS_NONE;
1101
if (directory_ace) {
1102
nt_mask |= ((perms & S_IRUSR) ? UNIX_DIRECTORY_ACCESS_R : 0 );
1103
nt_mask |= ((perms & S_IWUSR) ? UNIX_DIRECTORY_ACCESS_W : 0 );
1104
nt_mask |= ((perms & S_IXUSR) ? UNIX_DIRECTORY_ACCESS_X : 0 );
1106
nt_mask |= ((perms & S_IRUSR) ? UNIX_ACCESS_R : 0 );
1107
nt_mask |= ((perms & S_IWUSR) ? UNIX_ACCESS_W : 0 );
1108
nt_mask |= ((perms & S_IXUSR) ? UNIX_ACCESS_X : 0 );
1110
if ((perms & S_IWUSR) && lp_dos_filemode(snum)) {
1111
nt_mask |= (SEC_STD_WRITE_DAC|SEC_STD_WRITE_OWNER);
1115
DEBUG(10,("map_canon_ace_perms: Mapped (UNIX) %x to (NT) %x\n",
1116
(unsigned int)perms, (unsigned int)nt_mask ));
1121
/****************************************************************************
1122
Map NT perms to a UNIX mode_t.
1123
****************************************************************************/
1125
#define FILE_SPECIFIC_READ_BITS (FILE_READ_DATA|FILE_READ_EA|FILE_READ_ATTRIBUTES)
1126
#define FILE_SPECIFIC_WRITE_BITS (FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_WRITE_EA|FILE_WRITE_ATTRIBUTES)
1127
#define FILE_SPECIFIC_EXECUTE_BITS (FILE_EXECUTE)
1129
static mode_t map_nt_perms( uint32 *mask, int type)
1135
if((*mask) & GENERIC_ALL_ACCESS)
1136
mode = S_IRUSR|S_IWUSR|S_IXUSR;
1138
mode |= ((*mask) & (GENERIC_READ_ACCESS|FILE_SPECIFIC_READ_BITS)) ? S_IRUSR : 0;
1139
mode |= ((*mask) & (GENERIC_WRITE_ACCESS|FILE_SPECIFIC_WRITE_BITS)) ? S_IWUSR : 0;
1140
mode |= ((*mask) & (GENERIC_EXECUTE_ACCESS|FILE_SPECIFIC_EXECUTE_BITS)) ? S_IXUSR : 0;
1144
if((*mask) & GENERIC_ALL_ACCESS)
1145
mode = S_IRGRP|S_IWGRP|S_IXGRP;
1147
mode |= ((*mask) & (GENERIC_READ_ACCESS|FILE_SPECIFIC_READ_BITS)) ? S_IRGRP : 0;
1148
mode |= ((*mask) & (GENERIC_WRITE_ACCESS|FILE_SPECIFIC_WRITE_BITS)) ? S_IWGRP : 0;
1149
mode |= ((*mask) & (GENERIC_EXECUTE_ACCESS|FILE_SPECIFIC_EXECUTE_BITS)) ? S_IXGRP : 0;
1153
if((*mask) & GENERIC_ALL_ACCESS)
1154
mode = S_IROTH|S_IWOTH|S_IXOTH;
1156
mode |= ((*mask) & (GENERIC_READ_ACCESS|FILE_SPECIFIC_READ_BITS)) ? S_IROTH : 0;
1157
mode |= ((*mask) & (GENERIC_WRITE_ACCESS|FILE_SPECIFIC_WRITE_BITS)) ? S_IWOTH : 0;
1158
mode |= ((*mask) & (GENERIC_EXECUTE_ACCESS|FILE_SPECIFIC_EXECUTE_BITS)) ? S_IXOTH : 0;
1166
/****************************************************************************
1167
Unpack a SEC_DESC into a UNIX owner and group.
1168
****************************************************************************/
1170
NTSTATUS unpack_nt_owners(int snum, uid_t *puser, gid_t *pgrp, uint32 security_info_sent, const SEC_DESC *psd)
1178
if(security_info_sent == 0) {
1179
DEBUG(0,("unpack_nt_owners: no security info sent !\n"));
1180
return NT_STATUS_OK;
1184
* Validate the owner and group SID's.
1187
memset(&owner_sid, '\0', sizeof(owner_sid));
1188
memset(&grp_sid, '\0', sizeof(grp_sid));
1190
DEBUG(5,("unpack_nt_owners: validating owner_sids.\n"));
1193
* Don't immediately fail if the owner sid cannot be validated.
1194
* This may be a group chown only set.
1197
if (security_info_sent & OWNER_SECURITY_INFORMATION) {
1198
sid_copy(&owner_sid, psd->owner_sid);
1199
if (!sid_to_uid(&owner_sid, puser)) {
1200
if (lp_force_unknown_acl_user(snum)) {
1201
/* this allows take ownership to work
1203
*puser = current_user.ut.uid;
1205
DEBUG(3,("unpack_nt_owners: unable to validate"
1206
" owner sid for %s\n",
1207
sid_string_dbg(&owner_sid)));
1208
return NT_STATUS_INVALID_OWNER;
1211
DEBUG(3,("unpack_nt_owners: owner sid mapped to uid %u\n",
1212
(unsigned int)*puser ));
1216
* Don't immediately fail if the group sid cannot be validated.
1217
* This may be an owner chown only set.
1220
if (security_info_sent & GROUP_SECURITY_INFORMATION) {
1221
sid_copy(&grp_sid, psd->group_sid);
1222
if (!sid_to_gid( &grp_sid, pgrp)) {
1223
if (lp_force_unknown_acl_user(snum)) {
1224
/* this allows take group ownership to work
1226
*pgrp = current_user.ut.gid;
1228
DEBUG(3,("unpack_nt_owners: unable to validate"
1230
return NT_STATUS_INVALID_OWNER;
1233
DEBUG(3,("unpack_nt_owners: group sid mapped to gid %u\n",
1234
(unsigned int)*pgrp));
1237
DEBUG(5,("unpack_nt_owners: owner_sids validated.\n"));
1239
return NT_STATUS_OK;
1242
/****************************************************************************
1243
Ensure the enforced permissions for this share apply.
1244
****************************************************************************/
1246
static void apply_default_perms(const struct share_params *params,
1247
const bool is_directory, canon_ace *pace,
1250
mode_t and_bits = (mode_t)0;
1251
mode_t or_bits = (mode_t)0;
1253
/* Get the initial bits to apply. */
1256
and_bits = lp_dir_security_mask(params->service);
1257
or_bits = lp_force_dir_security_mode(params->service);
1259
and_bits = lp_security_mask(params->service);
1260
or_bits = lp_force_security_mode(params->service);
1263
/* Now bounce them into the S_USR space. */
1266
/* Ensure owner has read access. */
1267
pace->perms |= S_IRUSR;
1269
pace->perms |= (S_IWUSR|S_IXUSR);
1270
and_bits = unix_perms_to_acl_perms(and_bits, S_IRUSR, S_IWUSR, S_IXUSR);
1271
or_bits = unix_perms_to_acl_perms(or_bits, S_IRUSR, S_IWUSR, S_IXUSR);
1274
and_bits = unix_perms_to_acl_perms(and_bits, S_IRGRP, S_IWGRP, S_IXGRP);
1275
or_bits = unix_perms_to_acl_perms(or_bits, S_IRGRP, S_IWGRP, S_IXGRP);
1278
and_bits = unix_perms_to_acl_perms(and_bits, S_IROTH, S_IWOTH, S_IXOTH);
1279
or_bits = unix_perms_to_acl_perms(or_bits, S_IROTH, S_IWOTH, S_IXOTH);
1283
pace->perms = ((pace->perms & and_bits)|or_bits);
1286
/****************************************************************************
1287
Check if a given uid/SID is in a group gid/SID. This is probably very
1288
expensive and will need optimisation. A *lot* of optimisation :-). JRA.
1289
****************************************************************************/
1291
static bool uid_entry_in_group( canon_ace *uid_ace, canon_ace *group_ace )
1293
const char *u_name = NULL;
1295
/* "Everyone" always matches every uid. */
1297
if (sid_equal(&group_ace->trustee, &global_sid_World))
1301
* if it's the current user, we already have the unix token
1302
* and don't need to do the complex user_in_group_sid() call
1304
if (uid_ace->unix_ug.uid == current_user.ut.uid) {
1307
if (group_ace->unix_ug.gid == current_user.ut.gid) {
1311
for (i=0; i < current_user.ut.ngroups; i++) {
1312
if (group_ace->unix_ug.gid == current_user.ut.groups[i]) {
1318
/* u_name talloc'ed off tos. */
1319
u_name = uidtoname(uid_ace->unix_ug.uid);
1325
* user_in_group_sid() uses create_token_from_username()
1326
* which creates an artificial NT token given just a username,
1327
* so this is not reliable for users from foreign domains
1328
* exported by winbindd!
1330
return user_in_group_sid(u_name, &group_ace->trustee);
1333
/****************************************************************************
1334
A well formed POSIX file or default ACL has at least 3 entries, a
1335
SMB_ACL_USER_OBJ, SMB_ACL_GROUP_OBJ, SMB_ACL_OTHER_OBJ.
1336
In addition, the owner must always have at least read access.
1337
When using this call on get_acl, the pst struct is valid and contains
1338
the mode of the file. When using this call on set_acl, the pst struct has
1339
been modified to have a mode containing the default for this file or directory
1341
****************************************************************************/
1343
static bool ensure_canon_entry_valid(canon_ace **pp_ace,
1344
const struct share_params *params,
1345
const bool is_directory,
1346
const DOM_SID *pfile_owner_sid,
1347
const DOM_SID *pfile_grp_sid,
1348
const SMB_STRUCT_STAT *pst,
1352
bool got_user = False;
1353
bool got_grp = False;
1354
bool got_other = False;
1355
canon_ace *pace_other = NULL;
1357
for (pace = *pp_ace; pace; pace = pace->next) {
1358
if (pace->type == SMB_ACL_USER_OBJ) {
1361
apply_default_perms(params, is_directory, pace, S_IRUSR);
1364
} else if (pace->type == SMB_ACL_GROUP_OBJ) {
1367
* Ensure create mask/force create mode is respected on set.
1371
apply_default_perms(params, is_directory, pace, S_IRGRP);
1374
} else if (pace->type == SMB_ACL_OTHER) {
1377
* Ensure create mask/force create mode is respected on set.
1381
apply_default_perms(params, is_directory, pace, S_IROTH);
1388
if ((pace = SMB_MALLOC_P(canon_ace)) == NULL) {
1389
DEBUG(0,("ensure_canon_entry_valid: malloc fail.\n"));
1394
pace->type = SMB_ACL_USER_OBJ;
1395
pace->owner_type = UID_ACE;
1396
pace->unix_ug.uid = pst->st_uid;
1397
pace->trustee = *pfile_owner_sid;
1398
pace->attr = ALLOW_ACE;
1401
/* See if the owning user is in any of the other groups in
1402
the ACE. If so, OR in the permissions from that group. */
1404
bool group_matched = False;
1405
canon_ace *pace_iter;
1407
for (pace_iter = *pp_ace; pace_iter; pace_iter = pace_iter->next) {
1408
if (pace_iter->type == SMB_ACL_GROUP_OBJ || pace_iter->type == SMB_ACL_GROUP) {
1409
if (uid_entry_in_group(pace, pace_iter)) {
1410
pace->perms |= pace_iter->perms;
1411
group_matched = True;
1416
/* If we only got an "everyone" perm, just use that. */
1417
if (!group_matched) {
1419
pace->perms = pace_other->perms;
1424
apply_default_perms(params, is_directory, pace, S_IRUSR);
1426
pace->perms = unix_perms_to_acl_perms(pst->st_mode, S_IRUSR, S_IWUSR, S_IXUSR);
1429
DLIST_ADD(*pp_ace, pace);
1433
if ((pace = SMB_MALLOC_P(canon_ace)) == NULL) {
1434
DEBUG(0,("ensure_canon_entry_valid: malloc fail.\n"));
1439
pace->type = SMB_ACL_GROUP_OBJ;
1440
pace->owner_type = GID_ACE;
1441
pace->unix_ug.uid = pst->st_gid;
1442
pace->trustee = *pfile_grp_sid;
1443
pace->attr = ALLOW_ACE;
1445
/* If we only got an "everyone" perm, just use that. */
1447
pace->perms = pace_other->perms;
1450
apply_default_perms(params, is_directory, pace, S_IRGRP);
1452
pace->perms = unix_perms_to_acl_perms(pst->st_mode, S_IRGRP, S_IWGRP, S_IXGRP);
1455
DLIST_ADD(*pp_ace, pace);
1459
if ((pace = SMB_MALLOC_P(canon_ace)) == NULL) {
1460
DEBUG(0,("ensure_canon_entry_valid: malloc fail.\n"));
1465
pace->type = SMB_ACL_OTHER;
1466
pace->owner_type = WORLD_ACE;
1467
pace->unix_ug.world = -1;
1468
pace->trustee = global_sid_World;
1469
pace->attr = ALLOW_ACE;
1472
apply_default_perms(params, is_directory, pace, S_IROTH);
1474
pace->perms = unix_perms_to_acl_perms(pst->st_mode, S_IROTH, S_IWOTH, S_IXOTH);
1476
DLIST_ADD(*pp_ace, pace);
1482
/****************************************************************************
1483
Check if a POSIX ACL has the required SMB_ACL_USER_OBJ and SMB_ACL_GROUP_OBJ entries.
1484
If it does not have them, check if there are any entries where the trustee is the
1485
file owner or the owning group, and map these to SMB_ACL_USER_OBJ and SMB_ACL_GROUP_OBJ.
1486
****************************************************************************/
1488
static void check_owning_objs(canon_ace *ace, DOM_SID *pfile_owner_sid, DOM_SID *pfile_grp_sid)
1490
bool got_user_obj, got_group_obj;
1491
canon_ace *current_ace;
1494
entries = count_canon_ace_list(ace);
1495
got_user_obj = False;
1496
got_group_obj = False;
1498
for (i=0, current_ace = ace; i < entries; i++, current_ace = current_ace->next) {
1499
if (current_ace->type == SMB_ACL_USER_OBJ)
1500
got_user_obj = True;
1501
else if (current_ace->type == SMB_ACL_GROUP_OBJ)
1502
got_group_obj = True;
1504
if (got_user_obj && got_group_obj) {
1505
DEBUG(10,("check_owning_objs: ACL had owning user/group entries.\n"));
1509
for (i=0, current_ace = ace; i < entries; i++, current_ace = current_ace->next) {
1510
if (!got_user_obj && current_ace->owner_type == UID_ACE &&
1511
sid_equal(¤t_ace->trustee, pfile_owner_sid)) {
1512
current_ace->type = SMB_ACL_USER_OBJ;
1513
got_user_obj = True;
1515
if (!got_group_obj && current_ace->owner_type == GID_ACE &&
1516
sid_equal(¤t_ace->trustee, pfile_grp_sid)) {
1517
current_ace->type = SMB_ACL_GROUP_OBJ;
1518
got_group_obj = True;
1522
DEBUG(10,("check_owning_objs: ACL is missing an owner entry.\n"));
1524
DEBUG(10,("check_owning_objs: ACL is missing an owning group entry.\n"));
1527
/****************************************************************************
1528
Unpack a SEC_DESC into two canonical ace lists.
1529
****************************************************************************/
1531
static bool create_canon_ace_lists(files_struct *fsp,
1532
SMB_STRUCT_STAT *pst,
1533
DOM_SID *pfile_owner_sid,
1534
DOM_SID *pfile_grp_sid,
1535
canon_ace **ppfile_ace,
1536
canon_ace **ppdir_ace,
1537
const SEC_ACL *dacl)
1539
bool all_aces_are_inherit_only = (fsp->is_directory ? True : False);
1540
canon_ace *file_ace = NULL;
1541
canon_ace *dir_ace = NULL;
1542
canon_ace *current_ace = NULL;
1543
bool got_dir_allow = False;
1544
bool got_file_allow = False;
1551
* Convert the incoming ACL into a more regular form.
1554
for(i = 0; i < dacl->num_aces; i++) {
1555
SEC_ACE *psa = &dacl->aces[i];
1557
if((psa->type != SEC_ACE_TYPE_ACCESS_ALLOWED) && (psa->type != SEC_ACE_TYPE_ACCESS_DENIED)) {
1558
DEBUG(3,("create_canon_ace_lists: unable to set anything but an ALLOW or DENY ACE.\n"));
1562
if (nt4_compatible_acls()) {
1564
* The security mask may be UNIX_ACCESS_NONE which should map into
1565
* no permissions (we overload the WRITE_OWNER bit for this) or it
1566
* should be one of the ALL/EXECUTE/READ/WRITE bits. Arrange for this
1567
* to be so. Any other bits override the UNIX_ACCESS_NONE bit.
1571
* Convert GENERIC bits to specific bits.
1574
se_map_generic(&psa->access_mask, &file_generic_mapping);
1576
psa->access_mask &= (UNIX_ACCESS_NONE|FILE_ALL_ACCESS);
1578
if(psa->access_mask != UNIX_ACCESS_NONE)
1579
psa->access_mask &= ~UNIX_ACCESS_NONE;
1584
* Deal with the fact that NT 4.x re-writes the canonical format
1585
* that we return for default ACLs. If a directory ACE is identical
1586
* to a inherited directory ACE then NT changes the bits so that the
1587
* first ACE is set to OI|IO and the second ACE for this SID is set
1588
* to CI. We need to repair this. JRA.
1591
for(i = 0; i < dacl->num_aces; i++) {
1592
SEC_ACE *psa1 = &dacl->aces[i];
1594
for (j = i + 1; j < dacl->num_aces; j++) {
1595
SEC_ACE *psa2 = &dacl->aces[j];
1597
if (psa1->access_mask != psa2->access_mask)
1600
if (!sid_equal(&psa1->trustee, &psa2->trustee))
1604
* Ok - permission bits and SIDs are equal.
1605
* Check if flags were re-written.
1608
if (psa1->flags & SEC_ACE_FLAG_INHERIT_ONLY) {
1610
psa1->flags |= (psa2->flags & (SEC_ACE_FLAG_CONTAINER_INHERIT|SEC_ACE_FLAG_OBJECT_INHERIT));
1611
psa2->flags &= ~(SEC_ACE_FLAG_CONTAINER_INHERIT|SEC_ACE_FLAG_OBJECT_INHERIT);
1613
} else if (psa2->flags & SEC_ACE_FLAG_INHERIT_ONLY) {
1615
psa2->flags |= (psa1->flags & (SEC_ACE_FLAG_CONTAINER_INHERIT|SEC_ACE_FLAG_OBJECT_INHERIT));
1616
psa1->flags &= ~(SEC_ACE_FLAG_CONTAINER_INHERIT|SEC_ACE_FLAG_OBJECT_INHERIT);
1622
for(i = 0; i < dacl->num_aces; i++) {
1623
SEC_ACE *psa = &dacl->aces[i];
1626
* Create a cannon_ace entry representing this NT DACL ACE.
1629
if ((current_ace = SMB_MALLOC_P(canon_ace)) == NULL) {
1630
free_canon_ace_list(file_ace);
1631
free_canon_ace_list(dir_ace);
1632
DEBUG(0,("create_canon_ace_lists: malloc fail.\n"));
1636
ZERO_STRUCTP(current_ace);
1638
sid_copy(¤t_ace->trustee, &psa->trustee);
1641
* Try and work out if the SID is a user or group
1642
* as we need to flag these differently for POSIX.
1643
* Note what kind of a POSIX ACL this should map to.
1646
if( sid_equal(¤t_ace->trustee, &global_sid_World)) {
1647
current_ace->owner_type = WORLD_ACE;
1648
current_ace->unix_ug.world = -1;
1649
current_ace->type = SMB_ACL_OTHER;
1650
} else if (sid_equal(¤t_ace->trustee, &global_sid_Creator_Owner)) {
1651
current_ace->owner_type = UID_ACE;
1652
current_ace->unix_ug.uid = pst->st_uid;
1653
current_ace->type = SMB_ACL_USER_OBJ;
1656
* The Creator Owner entry only specifies inheritable permissions,
1657
* never access permissions. WinNT doesn't always set the ACE to
1658
*INHERIT_ONLY, though.
1661
if (nt4_compatible_acls())
1662
psa->flags |= SEC_ACE_FLAG_INHERIT_ONLY;
1663
} else if (sid_equal(¤t_ace->trustee, &global_sid_Creator_Group)) {
1664
current_ace->owner_type = GID_ACE;
1665
current_ace->unix_ug.gid = pst->st_gid;
1666
current_ace->type = SMB_ACL_GROUP_OBJ;
1669
* The Creator Group entry only specifies inheritable permissions,
1670
* never access permissions. WinNT doesn't always set the ACE to
1671
*INHERIT_ONLY, though.
1673
if (nt4_compatible_acls())
1674
psa->flags |= SEC_ACE_FLAG_INHERIT_ONLY;
1676
} else if (sid_to_uid( ¤t_ace->trustee, ¤t_ace->unix_ug.uid)) {
1677
current_ace->owner_type = UID_ACE;
1678
/* If it's the owning user, this is a user_obj, not
1680
if (current_ace->unix_ug.uid == pst->st_uid) {
1681
current_ace->type = SMB_ACL_USER_OBJ;
1683
current_ace->type = SMB_ACL_USER;
1685
} else if (sid_to_gid( ¤t_ace->trustee, ¤t_ace->unix_ug.gid)) {
1686
current_ace->owner_type = GID_ACE;
1687
/* If it's the primary group, this is a group_obj, not
1689
if (current_ace->unix_ug.gid == pst->st_gid) {
1690
current_ace->type = SMB_ACL_GROUP_OBJ;
1692
current_ace->type = SMB_ACL_GROUP;
1696
* Silently ignore map failures in non-mappable SIDs (NT Authority, BUILTIN etc).
1699
if (non_mappable_sid(&psa->trustee)) {
1700
DEBUG(10, ("create_canon_ace_lists: ignoring "
1701
"non-mappable SID %s\n",
1702
sid_string_dbg(&psa->trustee)));
1703
SAFE_FREE(current_ace);
1707
free_canon_ace_list(file_ace);
1708
free_canon_ace_list(dir_ace);
1709
DEBUG(0, ("create_canon_ace_lists: unable to map SID "
1710
"%s to uid or gid.\n",
1711
sid_string_dbg(¤t_ace->trustee)));
1712
SAFE_FREE(current_ace);
1717
* Map the given NT permissions into a UNIX mode_t containing only
1718
* S_I(R|W|X)USR bits.
1721
current_ace->perms |= map_nt_perms( &psa->access_mask, S_IRUSR);
1722
current_ace->attr = (psa->type == SEC_ACE_TYPE_ACCESS_ALLOWED) ? ALLOW_ACE : DENY_ACE;
1724
/* Store the ace_flag. */
1725
current_ace->ace_flags = psa->flags;
1728
* Now add the created ace to either the file list, the directory
1729
* list, or both. We *MUST* preserve the order here (hence we use
1730
* DLIST_ADD_END) as NT ACLs are order dependent.
1733
if (fsp->is_directory) {
1736
* We can only add to the default POSIX ACE list if the ACE is
1737
* designed to be inherited by both files and directories.
1740
if ((psa->flags & (SEC_ACE_FLAG_OBJECT_INHERIT|SEC_ACE_FLAG_CONTAINER_INHERIT)) ==
1741
(SEC_ACE_FLAG_OBJECT_INHERIT|SEC_ACE_FLAG_CONTAINER_INHERIT)) {
1743
DLIST_ADD_END(dir_ace, current_ace, canon_ace *);
1746
* Note if this was an allow ace. We can't process
1747
* any further deny ace's after this.
1750
if (current_ace->attr == ALLOW_ACE)
1751
got_dir_allow = True;
1753
if ((current_ace->attr == DENY_ACE) && got_dir_allow) {
1754
DEBUG(0,("create_canon_ace_lists: malformed ACL in inheritable ACL ! \
1755
Deny entry after Allow entry. Failing to set on file %s.\n", fsp->fsp_name ));
1756
free_canon_ace_list(file_ace);
1757
free_canon_ace_list(dir_ace);
1761
if( DEBUGLVL( 10 )) {
1762
dbgtext("create_canon_ace_lists: adding dir ACL:\n");
1763
print_canon_ace( current_ace, 0);
1767
* If this is not an inherit only ACE we need to add a duplicate
1771
if (!(psa->flags & SEC_ACE_FLAG_INHERIT_ONLY)) {
1772
canon_ace *dup_ace = dup_canon_ace(current_ace);
1775
DEBUG(0,("create_canon_ace_lists: malloc fail !\n"));
1776
free_canon_ace_list(file_ace);
1777
free_canon_ace_list(dir_ace);
1782
* We must not free current_ace here as its
1783
* pointer is now owned by the dir_ace list.
1785
current_ace = dup_ace;
1788
* We must not free current_ace here as its
1789
* pointer is now owned by the dir_ace list.
1797
* Only add to the file ACL if not inherit only.
1800
if (current_ace && !(psa->flags & SEC_ACE_FLAG_INHERIT_ONLY)) {
1801
DLIST_ADD_END(file_ace, current_ace, canon_ace *);
1804
* Note if this was an allow ace. We can't process
1805
* any further deny ace's after this.
1808
if (current_ace->attr == ALLOW_ACE)
1809
got_file_allow = True;
1811
if ((current_ace->attr == DENY_ACE) && got_file_allow) {
1812
DEBUG(0,("create_canon_ace_lists: malformed ACL in file ACL ! \
1813
Deny entry after Allow entry. Failing to set on file %s.\n", fsp->fsp_name ));
1814
free_canon_ace_list(file_ace);
1815
free_canon_ace_list(dir_ace);
1819
if( DEBUGLVL( 10 )) {
1820
dbgtext("create_canon_ace_lists: adding file ACL:\n");
1821
print_canon_ace( current_ace, 0);
1823
all_aces_are_inherit_only = False;
1825
* We must not free current_ace here as its
1826
* pointer is now owned by the file_ace list.
1832
* Free if ACE was not added.
1835
SAFE_FREE(current_ace);
1838
if (fsp->is_directory && all_aces_are_inherit_only) {
1840
* Windows 2000 is doing one of these weird 'inherit acl'
1841
* traverses to conserve NTFS ACL resources. Just pretend
1842
* there was no DACL sent. JRA.
1845
DEBUG(10,("create_canon_ace_lists: Win2k inherit acl traverse. Ignoring DACL.\n"));
1846
free_canon_ace_list(file_ace);
1847
free_canon_ace_list(dir_ace);
1852
* Check if we have SMB_ACL_USER_OBJ and SMB_ACL_GROUP_OBJ entries in each
1853
* ACL. If we don't have them, check if any SMB_ACL_USER/SMB_ACL_GROUP
1854
* entries can be converted to *_OBJ. Usually we will already have these
1855
* entries in the Default ACL, and the Access ACL will not have them.
1858
check_owning_objs(file_ace, pfile_owner_sid, pfile_grp_sid);
1861
check_owning_objs(dir_ace, pfile_owner_sid, pfile_grp_sid);
1865
*ppfile_ace = file_ace;
1866
*ppdir_ace = dir_ace;
1871
/****************************************************************************
1872
ASCII art time again... JRA :-).
1874
We have 4 cases to process when moving from an NT ACL to a POSIX ACL. Firstly,
1875
we insist the ACL is in canonical form (ie. all DENY entries preceede ALLOW
1876
entries). Secondly, the merge code has ensured that all duplicate SID entries for
1877
allow or deny have been merged, so the same SID can only appear once in the deny
1878
list or once in the allow list.
1880
We then process as follows :
1882
---------------------------------------------------------------------------
1883
First pass - look for a Everyone DENY entry.
1885
If it is deny all (rwx) trunate the list at this point.
1886
Else, walk the list from this point and use the deny permissions of this
1887
entry as a mask on all following allow entries. Finally, delete
1888
the Everyone DENY entry (we have applied it to everything possible).
1890
In addition, in this pass we remove any DENY entries that have
1891
no permissions (ie. they are a DENY nothing).
1892
---------------------------------------------------------------------------
1893
Second pass - only deal with deny user entries.
1895
DENY user1 (perms XXX)
1898
for all following allow group entries where user1 is in group
1899
new_perms |= group_perms;
1901
user1 entry perms = new_perms & ~ XXX;
1903
Convert the deny entry to an allow entry with the new perms and
1904
push to the end of the list. Note if the user was in no groups
1905
this maps to a specific allow nothing entry for this user.
1907
The common case from the NT ACL choser (userX deny all) is
1908
optimised so we don't do the group lookup - we just map to
1909
an allow nothing entry.
1911
What we're doing here is inferring the allow permissions the
1912
person setting the ACE on user1 wanted by looking at the allow
1913
permissions on the groups the user is currently in. This will
1914
be a snapshot, depending on group membership but is the best
1915
we can do and has the advantage of failing closed rather than
1917
---------------------------------------------------------------------------
1918
Third pass - only deal with deny group entries.
1920
DENY group1 (perms XXX)
1922
for all following allow user entries where user is in group1
1923
user entry perms = user entry perms & ~ XXX;
1925
If there is a group Everyone allow entry with permissions YYY,
1926
convert the group1 entry to an allow entry and modify its
1929
new_perms = YYY & ~ XXX
1931
and push to the end of the list.
1933
If there is no group Everyone allow entry then convert the
1934
group1 entry to a allow nothing entry and push to the end of the list.
1936
Note that the common case from the NT ACL choser (groupX deny all)
1937
cannot be optimised here as we need to modify user entries who are
1938
in the group to change them to a deny all also.
1940
What we're doing here is modifying the allow permissions of
1941
user entries (which are more specific in POSIX ACLs) to mask
1942
out the explicit deny set on the group they are in. This will
1943
be a snapshot depending on current group membership but is the
1944
best we can do and has the advantage of failing closed rather
1946
---------------------------------------------------------------------------
1947
Fourth pass - cope with cumulative permissions.
1949
for all allow user entries, if there exists an allow group entry with
1950
more permissive permissions, and the user is in that group, rewrite the
1951
allow user permissions to contain both sets of permissions.
1953
Currently the code for this is #ifdef'ed out as these semantics make
1954
no sense to me. JRA.
1955
---------------------------------------------------------------------------
1957
Note we *MUST* do the deny user pass first as this will convert deny user
1958
entries into allow user entries which can then be processed by the deny
1961
The above algorithm took a *lot* of thinking about - hence this
1962
explaination :-). JRA.
1963
****************************************************************************/
1965
/****************************************************************************
1966
Process a canon_ace list entries. This is very complex code. We need
1967
to go through and remove the "deny" permissions from any allow entry that matches
1968
the id of this entry. We have already refused any NT ACL that wasn't in correct
1969
order (DENY followed by ALLOW). If any allow entry ends up with zero permissions,
1970
we just remove it (to fail safe). We have already removed any duplicate ace
1971
entries. Treat an "Everyone" DENY_ACE as a special case - use it to mask all
1973
****************************************************************************/
1975
static void process_deny_list( canon_ace **pp_ace_list )
1977
canon_ace *ace_list = *pp_ace_list;
1978
canon_ace *curr_ace = NULL;
1979
canon_ace *curr_ace_next = NULL;
1981
/* Pass 1 above - look for an Everyone, deny entry. */
1983
for (curr_ace = ace_list; curr_ace; curr_ace = curr_ace_next) {
1984
canon_ace *allow_ace_p;
1986
curr_ace_next = curr_ace->next; /* So we can't lose the link. */
1988
if (curr_ace->attr != DENY_ACE)
1991
if (curr_ace->perms == (mode_t)0) {
1993
/* Deny nothing entry - delete. */
1995
DLIST_REMOVE(ace_list, curr_ace);
1999
if (!sid_equal(&curr_ace->trustee, &global_sid_World))
2002
/* JRATEST - assert. */
2003
SMB_ASSERT(curr_ace->owner_type == WORLD_ACE);
2005
if (curr_ace->perms == ALL_ACE_PERMS) {
2008
* Optimisation. This is a DENY_ALL to Everyone. Truncate the
2009
* list at this point including this entry.
2012
canon_ace *prev_entry = curr_ace->prev;
2014
free_canon_ace_list( curr_ace );
2016
prev_entry->next = NULL;
2018
/* We deleted the entire list. */
2024
for (allow_ace_p = curr_ace->next; allow_ace_p; allow_ace_p = allow_ace_p->next) {
2027
* Only mask off allow entries.
2030
if (allow_ace_p->attr != ALLOW_ACE)
2033
allow_ace_p->perms &= ~curr_ace->perms;
2037
* Now it's been applied, remove it.
2040
DLIST_REMOVE(ace_list, curr_ace);
2043
/* Pass 2 above - deal with deny user entries. */
2045
for (curr_ace = ace_list; curr_ace; curr_ace = curr_ace_next) {
2046
mode_t new_perms = (mode_t)0;
2047
canon_ace *allow_ace_p;
2049
curr_ace_next = curr_ace->next; /* So we can't lose the link. */
2051
if (curr_ace->attr != DENY_ACE)
2054
if (curr_ace->owner_type != UID_ACE)
2057
if (curr_ace->perms == ALL_ACE_PERMS) {
2060
* Optimisation - this is a deny everything to this user.
2061
* Convert to an allow nothing and push to the end of the list.
2064
curr_ace->attr = ALLOW_ACE;
2065
curr_ace->perms = (mode_t)0;
2066
DLIST_DEMOTE(ace_list, curr_ace, canon_ace *);
2070
for (allow_ace_p = curr_ace->next; allow_ace_p; allow_ace_p = allow_ace_p->next) {
2072
if (allow_ace_p->attr != ALLOW_ACE)
2075
/* We process GID_ACE and WORLD_ACE entries only. */
2077
if (allow_ace_p->owner_type == UID_ACE)
2080
if (uid_entry_in_group( curr_ace, allow_ace_p))
2081
new_perms |= allow_ace_p->perms;
2085
* Convert to a allow entry, modify the perms and push to the end
2089
curr_ace->attr = ALLOW_ACE;
2090
curr_ace->perms = (new_perms & ~curr_ace->perms);
2091
DLIST_DEMOTE(ace_list, curr_ace, canon_ace *);
2094
/* Pass 3 above - deal with deny group entries. */
2096
for (curr_ace = ace_list; curr_ace; curr_ace = curr_ace_next) {
2097
canon_ace *allow_ace_p;
2098
canon_ace *allow_everyone_p = NULL;
2100
curr_ace_next = curr_ace->next; /* So we can't lose the link. */
2102
if (curr_ace->attr != DENY_ACE)
2105
if (curr_ace->owner_type != GID_ACE)
2108
for (allow_ace_p = curr_ace->next; allow_ace_p; allow_ace_p = allow_ace_p->next) {
2110
if (allow_ace_p->attr != ALLOW_ACE)
2113
/* Store a pointer to the Everyone allow, if it exists. */
2114
if (allow_ace_p->owner_type == WORLD_ACE)
2115
allow_everyone_p = allow_ace_p;
2117
/* We process UID_ACE entries only. */
2119
if (allow_ace_p->owner_type != UID_ACE)
2122
/* Mask off the deny group perms. */
2124
if (uid_entry_in_group( allow_ace_p, curr_ace))
2125
allow_ace_p->perms &= ~curr_ace->perms;
2129
* Convert the deny to an allow with the correct perms and
2130
* push to the end of the list.
2133
curr_ace->attr = ALLOW_ACE;
2134
if (allow_everyone_p)
2135
curr_ace->perms = allow_everyone_p->perms & ~curr_ace->perms;
2137
curr_ace->perms = (mode_t)0;
2138
DLIST_DEMOTE(ace_list, curr_ace, canon_ace *);
2141
/* Doing this fourth pass allows Windows semantics to be layered
2142
* on top of POSIX semantics. I'm not sure if this is desirable.
2143
* For example, in W2K ACLs there is no way to say, "Group X no
2144
* access, user Y full access" if user Y is a member of group X.
2145
* This seems completely broken semantics to me.... JRA.
2149
/* Pass 4 above - deal with allow entries. */
2151
for (curr_ace = ace_list; curr_ace; curr_ace = curr_ace_next) {
2152
canon_ace *allow_ace_p;
2154
curr_ace_next = curr_ace->next; /* So we can't lose the link. */
2156
if (curr_ace->attr != ALLOW_ACE)
2159
if (curr_ace->owner_type != UID_ACE)
2162
for (allow_ace_p = ace_list; allow_ace_p; allow_ace_p = allow_ace_p->next) {
2164
if (allow_ace_p->attr != ALLOW_ACE)
2167
/* We process GID_ACE entries only. */
2169
if (allow_ace_p->owner_type != GID_ACE)
2172
/* OR in the group perms. */
2174
if (uid_entry_in_group( curr_ace, allow_ace_p))
2175
curr_ace->perms |= allow_ace_p->perms;
2180
*pp_ace_list = ace_list;
2183
/****************************************************************************
2184
Create a default mode that will be used if a security descriptor entry has
2185
no user/group/world entries.
2186
****************************************************************************/
2188
static mode_t create_default_mode(files_struct *fsp, bool interitable_mode)
2190
int snum = SNUM(fsp->conn);
2191
mode_t and_bits = (mode_t)0;
2192
mode_t or_bits = (mode_t)0;
2193
mode_t mode = interitable_mode
2194
? unix_mode( fsp->conn, FILE_ATTRIBUTE_ARCHIVE, fsp->fsp_name,
2198
if (fsp->is_directory)
2199
mode |= (S_IWUSR|S_IXUSR);
2202
* Now AND with the create mode/directory mode bits then OR with the
2203
* force create mode/force directory mode bits.
2206
if (fsp->is_directory) {
2207
and_bits = lp_dir_security_mask(snum);
2208
or_bits = lp_force_dir_security_mode(snum);
2210
and_bits = lp_security_mask(snum);
2211
or_bits = lp_force_security_mode(snum);
2214
return ((mode & and_bits)|or_bits);
2217
/****************************************************************************
2218
Unpack a SEC_DESC into two canonical ace lists. We don't depend on this
2220
****************************************************************************/
2222
static bool unpack_canon_ace(files_struct *fsp,
2223
SMB_STRUCT_STAT *pst,
2224
DOM_SID *pfile_owner_sid,
2225
DOM_SID *pfile_grp_sid,
2226
canon_ace **ppfile_ace,
2227
canon_ace **ppdir_ace,
2228
uint32 security_info_sent,
2229
const SEC_DESC *psd)
2231
canon_ace *file_ace = NULL;
2232
canon_ace *dir_ace = NULL;
2237
if(security_info_sent == 0) {
2238
DEBUG(0,("unpack_canon_ace: no security info sent !\n"));
2243
* If no DACL then this is a chown only security descriptor.
2246
if(!(security_info_sent & DACL_SECURITY_INFORMATION) || !psd->dacl)
2250
* Now go through the DACL and create the canon_ace lists.
2253
if (!create_canon_ace_lists( fsp, pst, pfile_owner_sid, pfile_grp_sid,
2254
&file_ace, &dir_ace, psd->dacl))
2257
if ((file_ace == NULL) && (dir_ace == NULL)) {
2258
/* W2K traverse DACL set - ignore. */
2263
* Go through the canon_ace list and merge entries
2264
* belonging to identical users of identical allow or deny type.
2265
* We can do this as all deny entries come first, followed by
2266
* all allow entries (we have mandated this before accepting this acl).
2269
print_canon_ace_list( "file ace - before merge", file_ace);
2270
merge_aces( &file_ace );
2272
print_canon_ace_list( "dir ace - before merge", dir_ace);
2273
merge_aces( &dir_ace );
2276
* NT ACLs are order dependent. Go through the acl lists and
2277
* process DENY entries by masking the allow entries.
2280
print_canon_ace_list( "file ace - before deny", file_ace);
2281
process_deny_list( &file_ace);
2283
print_canon_ace_list( "dir ace - before deny", dir_ace);
2284
process_deny_list( &dir_ace);
2287
* A well formed POSIX file or default ACL has at least 3 entries, a
2288
* SMB_ACL_USER_OBJ, SMB_ACL_GROUP_OBJ, SMB_ACL_OTHER_OBJ
2289
* and optionally a mask entry. Ensure this is the case.
2292
print_canon_ace_list( "file ace - before valid", file_ace);
2295
* A default 3 element mode entry for a file should be r-- --- ---.
2296
* A default 3 element mode entry for a directory should be rwx --- ---.
2299
pst->st_mode = create_default_mode(fsp, False);
2301
if (!ensure_canon_entry_valid(&file_ace, fsp->conn->params, fsp->is_directory, pfile_owner_sid, pfile_grp_sid, pst, True)) {
2302
free_canon_ace_list(file_ace);
2303
free_canon_ace_list(dir_ace);
2307
print_canon_ace_list( "dir ace - before valid", dir_ace);
2310
* A default inheritable 3 element mode entry for a directory should be the
2311
* mode Samba will use to create a file within. Ensure user rwx bits are set if
2315
pst->st_mode = create_default_mode(fsp, True);
2317
if (dir_ace && !ensure_canon_entry_valid(&dir_ace, fsp->conn->params, fsp->is_directory, pfile_owner_sid, pfile_grp_sid, pst, True)) {
2318
free_canon_ace_list(file_ace);
2319
free_canon_ace_list(dir_ace);
2323
print_canon_ace_list( "file ace - return", file_ace);
2324
print_canon_ace_list( "dir ace - return", dir_ace);
2326
*ppfile_ace = file_ace;
2327
*ppdir_ace = dir_ace;
2332
/******************************************************************************
2333
When returning permissions, try and fit NT display
2334
semantics if possible. Note the the canon_entries here must have been malloced.
2335
The list format should be - first entry = owner, followed by group and other user
2336
entries, last entry = other.
2338
Note that this doesn't exactly match the NT semantics for an ACL. As POSIX entries
2339
are not ordered, and match on the most specific entry rather than walking a list,
2340
then a simple POSIX permission of rw-r--r-- should really map to 5 entries,
2342
Entry 0: owner : deny all except read and write.
2343
Entry 1: owner : allow read and write.
2344
Entry 2: group : deny all except read.
2345
Entry 3: group : allow read.
2346
Entry 4: Everyone : allow read.
2348
But NT cannot display this in their ACL editor !
2349
********************************************************************************/
2351
static void arrange_posix_perms(const char *filename, canon_ace **pp_list_head)
2353
canon_ace *l_head = *pp_list_head;
2354
canon_ace *owner_ace = NULL;
2355
canon_ace *other_ace = NULL;
2356
canon_ace *ace = NULL;
2358
for (ace = l_head; ace; ace = ace->next) {
2359
if (ace->type == SMB_ACL_USER_OBJ)
2361
else if (ace->type == SMB_ACL_OTHER) {
2362
/* Last ace - this is "other" */
2367
if (!owner_ace || !other_ace) {
2368
DEBUG(0,("arrange_posix_perms: Invalid POSIX permissions for file %s, missing owner or other.\n",
2374
* The POSIX algorithm applies to owner first, and other last,
2375
* so ensure they are arranged in this order.
2379
DLIST_PROMOTE(l_head, owner_ace);
2383
DLIST_DEMOTE(l_head, other_ace, canon_ace *);
2386
/* We have probably changed the head of the list. */
2388
*pp_list_head = l_head;
2391
/****************************************************************************
2392
Create a linked list of canonical ACE entries.
2393
****************************************************************************/
2395
static canon_ace *canonicalise_acl(struct connection_struct *conn,
2396
const char *fname, SMB_ACL_T posix_acl,
2397
const SMB_STRUCT_STAT *psbuf,
2398
const DOM_SID *powner, const DOM_SID *pgroup, struct pai_val *pal, SMB_ACL_TYPE_T the_acl_type)
2400
mode_t acl_mask = (S_IRUSR|S_IWUSR|S_IXUSR);
2401
canon_ace *l_head = NULL;
2402
canon_ace *ace = NULL;
2403
canon_ace *next_ace = NULL;
2404
int entry_id = SMB_ACL_FIRST_ENTRY;
2405
SMB_ACL_ENTRY_T entry;
2408
while ( posix_acl && (SMB_VFS_SYS_ACL_GET_ENTRY(conn, posix_acl, entry_id, &entry) == 1)) {
2409
SMB_ACL_TAG_T tagtype;
2410
SMB_ACL_PERMSET_T permset;
2413
enum ace_owner owner_type;
2415
entry_id = SMB_ACL_NEXT_ENTRY;
2417
/* Is this a MASK entry ? */
2418
if (SMB_VFS_SYS_ACL_GET_TAG_TYPE(conn, entry, &tagtype) == -1)
2421
if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, entry, &permset) == -1)
2424
/* Decide which SID to use based on the ACL type. */
2426
case SMB_ACL_USER_OBJ:
2427
/* Get the SID from the owner. */
2428
sid_copy(&sid, powner);
2429
unix_ug.uid = psbuf->st_uid;
2430
owner_type = UID_ACE;
2434
uid_t *puid = (uid_t *)SMB_VFS_SYS_ACL_GET_QUALIFIER(conn, entry);
2436
DEBUG(0,("canonicalise_acl: Failed to get uid.\n"));
2440
* A SMB_ACL_USER entry for the owner is shadowed by the
2441
* SMB_ACL_USER_OBJ entry and Windows also cannot represent
2442
* that entry, so we ignore it. We also don't create such
2443
* entries out of the blue when setting ACLs, so a get/set
2444
* cycle will drop them.
2446
if (the_acl_type == SMB_ACL_TYPE_ACCESS && *puid == psbuf->st_uid) {
2447
SMB_VFS_SYS_ACL_FREE_QUALIFIER(conn, (void *)puid,tagtype);
2450
uid_to_sid( &sid, *puid);
2451
unix_ug.uid = *puid;
2452
owner_type = UID_ACE;
2453
SMB_VFS_SYS_ACL_FREE_QUALIFIER(conn, (void *)puid,tagtype);
2456
case SMB_ACL_GROUP_OBJ:
2457
/* Get the SID from the owning group. */
2458
sid_copy(&sid, pgroup);
2459
unix_ug.gid = psbuf->st_gid;
2460
owner_type = GID_ACE;
2464
gid_t *pgid = (gid_t *)SMB_VFS_SYS_ACL_GET_QUALIFIER(conn, entry);
2466
DEBUG(0,("canonicalise_acl: Failed to get gid.\n"));
2469
gid_to_sid( &sid, *pgid);
2470
unix_ug.gid = *pgid;
2471
owner_type = GID_ACE;
2472
SMB_VFS_SYS_ACL_FREE_QUALIFIER(conn, (void *)pgid,tagtype);
2476
acl_mask = convert_permset_to_mode_t(conn, permset);
2477
continue; /* Don't count the mask as an entry. */
2479
/* Use the Everyone SID */
2480
sid = global_sid_World;
2482
owner_type = WORLD_ACE;
2485
DEBUG(0,("canonicalise_acl: Unknown tagtype %u\n", (unsigned int)tagtype));
2490
* Add this entry to the list.
2493
if ((ace = SMB_MALLOC_P(canon_ace)) == NULL)
2497
ace->type = tagtype;
2498
ace->perms = convert_permset_to_mode_t(conn, permset);
2499
ace->attr = ALLOW_ACE;
2501
ace->unix_ug = unix_ug;
2502
ace->owner_type = owner_type;
2503
ace->ace_flags = get_pai_flags(pal, ace, (the_acl_type == SMB_ACL_TYPE_DEFAULT));
2505
DLIST_ADD(l_head, ace);
2509
* This next call will ensure we have at least a user/group/world set.
2512
if (!ensure_canon_entry_valid(&l_head, conn->params,
2513
S_ISDIR(psbuf->st_mode), powner, pgroup,
2518
* Now go through the list, masking the permissions with the
2519
* acl_mask. Ensure all DENY Entries are at the start of the list.
2522
DEBUG(10,("canonicalise_acl: %s ace entries before arrange :\n", the_acl_type == SMB_ACL_TYPE_ACCESS ? "Access" : "Default" ));
2524
for ( ace_count = 0, ace = l_head; ace; ace = next_ace, ace_count++) {
2525
next_ace = ace->next;
2527
/* Masks are only applied to entries other than USER_OBJ and OTHER. */
2528
if (ace->type != SMB_ACL_OTHER && ace->type != SMB_ACL_USER_OBJ)
2529
ace->perms &= acl_mask;
2531
if (ace->perms == 0) {
2532
DLIST_PROMOTE(l_head, ace);
2535
if( DEBUGLVL( 10 ) ) {
2536
print_canon_ace(ace, ace_count);
2540
arrange_posix_perms(fname,&l_head );
2542
print_canon_ace_list( "canonicalise_acl: ace entries after arrange", l_head );
2548
free_canon_ace_list(l_head);
2552
/****************************************************************************
2553
Check if the current user group list contains a given group.
2554
****************************************************************************/
2556
static bool current_user_in_group(gid_t gid)
2560
for (i = 0; i < current_user.ut.ngroups; i++) {
2561
if (current_user.ut.groups[i] == gid) {
2569
/****************************************************************************
2570
Should we override a deny ? Check 'acl group control' and 'dos filemode'.
2571
****************************************************************************/
2573
static bool acl_group_override(connection_struct *conn,
2574
SMB_STRUCT_STAT *psbuf,
2577
if ((errno != EPERM) && (errno != EACCES)) {
2581
/* file primary group == user primary or supplementary group */
2582
if (lp_acl_group_control(SNUM(conn)) &&
2583
current_user_in_group(psbuf->st_gid)) {
2587
/* user has writeable permission */
2588
if (lp_dos_filemode(SNUM(conn)) &&
2589
can_write_to_file(conn, fname, psbuf)) {
2596
/****************************************************************************
2597
Attempt to apply an ACL to a file or directory.
2598
****************************************************************************/
2600
static bool set_canon_ace_list(files_struct *fsp, canon_ace *the_ace, bool default_ace, SMB_STRUCT_STAT *psbuf, bool *pacl_set_support)
2602
connection_struct *conn = fsp->conn;
2604
SMB_ACL_T the_acl = SMB_VFS_SYS_ACL_INIT(conn, (int)count_canon_ace_list(the_ace) + 1);
2607
SMB_ACL_ENTRY_T mask_entry;
2608
bool got_mask_entry = False;
2609
SMB_ACL_PERMSET_T mask_permset;
2610
SMB_ACL_TYPE_T the_acl_type = (default_ace ? SMB_ACL_TYPE_DEFAULT : SMB_ACL_TYPE_ACCESS);
2611
bool needs_mask = False;
2612
mode_t mask_perms = 0;
2614
#if defined(POSIX_ACL_NEEDS_MASK)
2615
/* HP-UX always wants to have a mask (called "class" there). */
2619
if (the_acl == NULL) {
2621
if (!no_acl_syscall_error(errno)) {
2623
* Only print this error message if we have some kind of ACL
2624
* support that's not working. Otherwise we would always get this.
2626
DEBUG(0,("set_canon_ace_list: Unable to init %s ACL. (%s)\n",
2627
default_ace ? "default" : "file", strerror(errno) ));
2629
*pacl_set_support = False;
2633
if( DEBUGLVL( 10 )) {
2634
dbgtext("set_canon_ace_list: setting ACL:\n");
2635
for (i = 0, p_ace = the_ace; p_ace; p_ace = p_ace->next, i++ ) {
2636
print_canon_ace( p_ace, i);
2640
for (i = 0, p_ace = the_ace; p_ace; p_ace = p_ace->next, i++ ) {
2641
SMB_ACL_ENTRY_T the_entry;
2642
SMB_ACL_PERMSET_T the_permset;
2645
* ACLs only "need" an ACL_MASK entry if there are any named user or
2646
* named group entries. But if there is an ACL_MASK entry, it applies
2647
* to ACL_USER, ACL_GROUP, and ACL_GROUP_OBJ entries. Set the mask
2648
* so that it doesn't deny (i.e., mask off) any permissions.
2651
if (p_ace->type == SMB_ACL_USER || p_ace->type == SMB_ACL_GROUP) {
2653
mask_perms |= p_ace->perms;
2654
} else if (p_ace->type == SMB_ACL_GROUP_OBJ) {
2655
mask_perms |= p_ace->perms;
2659
* Get the entry for this ACE.
2662
if (SMB_VFS_SYS_ACL_CREATE_ENTRY(conn, &the_acl, &the_entry) == -1) {
2663
DEBUG(0,("set_canon_ace_list: Failed to create entry %d. (%s)\n",
2664
i, strerror(errno) ));
2668
if (p_ace->type == SMB_ACL_MASK) {
2669
mask_entry = the_entry;
2670
got_mask_entry = True;
2674
* Ok - we now know the ACL calls should be working, don't
2675
* allow fallback to chmod.
2678
*pacl_set_support = True;
2681
* Initialise the entry from the canon_ace.
2685
* First tell the entry what type of ACE this is.
2688
if (SMB_VFS_SYS_ACL_SET_TAG_TYPE(conn, the_entry, p_ace->type) == -1) {
2689
DEBUG(0,("set_canon_ace_list: Failed to set tag type on entry %d. (%s)\n",
2690
i, strerror(errno) ));
2695
* Only set the qualifier (user or group id) if the entry is a user
2699
if ((p_ace->type == SMB_ACL_USER) || (p_ace->type == SMB_ACL_GROUP)) {
2700
if (SMB_VFS_SYS_ACL_SET_QUALIFIER(conn, the_entry,(void *)&p_ace->unix_ug.uid) == -1) {
2701
DEBUG(0,("set_canon_ace_list: Failed to set qualifier on entry %d. (%s)\n",
2702
i, strerror(errno) ));
2708
* Convert the mode_t perms in the canon_ace to a POSIX permset.
2711
if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, the_entry, &the_permset) == -1) {
2712
DEBUG(0,("set_canon_ace_list: Failed to get permset on entry %d. (%s)\n",
2713
i, strerror(errno) ));
2717
if (map_acl_perms_to_permset(conn, p_ace->perms, &the_permset) == -1) {
2718
DEBUG(0,("set_canon_ace_list: Failed to create permset for mode (%u) on entry %d. (%s)\n",
2719
(unsigned int)p_ace->perms, i, strerror(errno) ));
2724
* ..and apply them to the entry.
2727
if (SMB_VFS_SYS_ACL_SET_PERMSET(conn, the_entry, the_permset) == -1) {
2728
DEBUG(0,("set_canon_ace_list: Failed to add permset on entry %d. (%s)\n",
2729
i, strerror(errno) ));
2734
print_canon_ace( p_ace, i);
2738
if (needs_mask && !got_mask_entry) {
2739
if (SMB_VFS_SYS_ACL_CREATE_ENTRY(conn, &the_acl, &mask_entry) == -1) {
2740
DEBUG(0,("set_canon_ace_list: Failed to create mask entry. (%s)\n", strerror(errno) ));
2744
if (SMB_VFS_SYS_ACL_SET_TAG_TYPE(conn, mask_entry, SMB_ACL_MASK) == -1) {
2745
DEBUG(0,("set_canon_ace_list: Failed to set tag type on mask entry. (%s)\n",strerror(errno) ));
2749
if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, mask_entry, &mask_permset) == -1) {
2750
DEBUG(0,("set_canon_ace_list: Failed to get mask permset. (%s)\n", strerror(errno) ));
2754
if (map_acl_perms_to_permset(conn, S_IRUSR|S_IWUSR|S_IXUSR, &mask_permset) == -1) {
2755
DEBUG(0,("set_canon_ace_list: Failed to create mask permset. (%s)\n", strerror(errno) ));
2759
if (SMB_VFS_SYS_ACL_SET_PERMSET(conn, mask_entry, mask_permset) == -1) {
2760
DEBUG(0,("set_canon_ace_list: Failed to add mask permset. (%s)\n", strerror(errno) ));
2766
* Finally apply it to the file or directory.
2769
if(default_ace || fsp->is_directory || fsp->fh->fd == -1) {
2770
if (SMB_VFS_SYS_ACL_SET_FILE(conn, fsp->fsp_name, the_acl_type, the_acl) == -1) {
2772
* Some systems allow all the above calls and only fail with no ACL support
2773
* when attempting to apply the acl. HPUX with HFS is an example of this. JRA.
2775
if (no_acl_syscall_error(errno)) {
2776
*pacl_set_support = False;
2779
if (acl_group_override(conn, psbuf, fsp->fsp_name)) {
2782
DEBUG(5,("set_canon_ace_list: acl group control on and current user in file %s primary group.\n",
2786
sret = SMB_VFS_SYS_ACL_SET_FILE(conn, fsp->fsp_name, the_acl_type, the_acl);
2794
DEBUG(2,("set_canon_ace_list: sys_acl_set_file type %s failed for file %s (%s).\n",
2795
the_acl_type == SMB_ACL_TYPE_DEFAULT ? "directory default" : "file",
2796
fsp->fsp_name, strerror(errno) ));
2801
if (SMB_VFS_SYS_ACL_SET_FD(fsp, the_acl) == -1) {
2803
* Some systems allow all the above calls and only fail with no ACL support
2804
* when attempting to apply the acl. HPUX with HFS is an example of this. JRA.
2806
if (no_acl_syscall_error(errno)) {
2807
*pacl_set_support = False;
2810
if (acl_group_override(conn, psbuf, fsp->fsp_name)) {
2813
DEBUG(5,("set_canon_ace_list: acl group control on and current user in file %s primary group.\n",
2817
sret = SMB_VFS_SYS_ACL_SET_FD(fsp, the_acl);
2825
DEBUG(2,("set_canon_ace_list: sys_acl_set_file failed for file %s (%s).\n",
2826
fsp->fsp_name, strerror(errno) ));
2836
if (the_acl != NULL) {
2837
SMB_VFS_SYS_ACL_FREE_ACL(conn, the_acl);
2843
/****************************************************************************
2844
Find a particular canon_ace entry.
2845
****************************************************************************/
2847
static struct canon_ace *canon_ace_entry_for(struct canon_ace *list, SMB_ACL_TAG_T type, posix_id *id)
2850
if (list->type == type && ((type != SMB_ACL_USER && type != SMB_ACL_GROUP) ||
2851
(type == SMB_ACL_USER && id && id->uid == list->unix_ug.uid) ||
2852
(type == SMB_ACL_GROUP && id && id->gid == list->unix_ug.gid)))
2859
/****************************************************************************
2861
****************************************************************************/
2863
SMB_ACL_T free_empty_sys_acl(connection_struct *conn, SMB_ACL_T the_acl)
2865
SMB_ACL_ENTRY_T entry;
2869
if (SMB_VFS_SYS_ACL_GET_ENTRY(conn, the_acl, SMB_ACL_FIRST_ENTRY, &entry) != 1) {
2870
SMB_VFS_SYS_ACL_FREE_ACL(conn, the_acl);
2876
/****************************************************************************
2877
Convert a canon_ace to a generic 3 element permission - if possible.
2878
****************************************************************************/
2880
#define MAP_PERM(p,mask,result) (((p) & (mask)) ? (result) : 0 )
2882
static bool convert_canon_ace_to_posix_perms( files_struct *fsp, canon_ace *file_ace_list, mode_t *posix_perms)
2884
int snum = SNUM(fsp->conn);
2885
size_t ace_count = count_canon_ace_list(file_ace_list);
2887
canon_ace *owner_ace = NULL;
2888
canon_ace *group_ace = NULL;
2889
canon_ace *other_ace = NULL;
2893
if (ace_count != 3) {
2894
DEBUG(3,("convert_canon_ace_to_posix_perms: Too many ACE entries for file %s to convert to \
2895
posix perms.\n", fsp->fsp_name ));
2899
for (ace_p = file_ace_list; ace_p; ace_p = ace_p->next) {
2900
if (ace_p->owner_type == UID_ACE)
2902
else if (ace_p->owner_type == GID_ACE)
2904
else if (ace_p->owner_type == WORLD_ACE)
2908
if (!owner_ace || !group_ace || !other_ace) {
2909
DEBUG(3,("convert_canon_ace_to_posix_perms: Can't get standard entries for file %s.\n",
2914
*posix_perms = (mode_t)0;
2916
*posix_perms |= owner_ace->perms;
2917
*posix_perms |= MAP_PERM(group_ace->perms, S_IRUSR, S_IRGRP);
2918
*posix_perms |= MAP_PERM(group_ace->perms, S_IWUSR, S_IWGRP);
2919
*posix_perms |= MAP_PERM(group_ace->perms, S_IXUSR, S_IXGRP);
2920
*posix_perms |= MAP_PERM(other_ace->perms, S_IRUSR, S_IROTH);
2921
*posix_perms |= MAP_PERM(other_ace->perms, S_IWUSR, S_IWOTH);
2922
*posix_perms |= MAP_PERM(other_ace->perms, S_IXUSR, S_IXOTH);
2924
/* The owner must have at least read access. */
2926
*posix_perms |= S_IRUSR;
2927
if (fsp->is_directory)
2928
*posix_perms |= (S_IWUSR|S_IXUSR);
2930
/* If requested apply the masks. */
2932
/* Get the initial bits to apply. */
2934
if (fsp->is_directory) {
2935
and_bits = lp_dir_security_mask(snum);
2936
or_bits = lp_force_dir_security_mode(snum);
2938
and_bits = lp_security_mask(snum);
2939
or_bits = lp_force_security_mode(snum);
2942
*posix_perms = (((*posix_perms) & and_bits)|or_bits);
2944
DEBUG(10,("convert_canon_ace_to_posix_perms: converted u=%o,g=%o,w=%o to perm=0%o for file %s.\n",
2945
(int)owner_ace->perms, (int)group_ace->perms, (int)other_ace->perms, (int)*posix_perms,
2951
/****************************************************************************
2952
Incoming NT ACLs on a directory can be split into a default POSIX acl (CI|OI|IO) and
2953
a normal POSIX acl. Win2k needs these split acls re-merging into one ACL
2954
with CI|OI set so it is inherited and also applies to the directory.
2955
Based on code from "Jim McDonough" <jmcd@us.ibm.com>.
2956
****************************************************************************/
2958
static size_t merge_default_aces( SEC_ACE *nt_ace_list, size_t num_aces)
2962
for (i = 0; i < num_aces; i++) {
2963
for (j = i+1; j < num_aces; j++) {
2964
uint32 i_flags_ni = (nt_ace_list[i].flags & ~SEC_ACE_FLAG_INHERITED_ACE);
2965
uint32 j_flags_ni = (nt_ace_list[j].flags & ~SEC_ACE_FLAG_INHERITED_ACE);
2966
bool i_inh = (nt_ace_list[i].flags & SEC_ACE_FLAG_INHERITED_ACE) ? True : False;
2967
bool j_inh = (nt_ace_list[j].flags & SEC_ACE_FLAG_INHERITED_ACE) ? True : False;
2969
/* We know the lower number ACE's are file entries. */
2970
if ((nt_ace_list[i].type == nt_ace_list[j].type) &&
2971
(nt_ace_list[i].size == nt_ace_list[j].size) &&
2972
(nt_ace_list[i].access_mask == nt_ace_list[j].access_mask) &&
2973
sid_equal(&nt_ace_list[i].trustee, &nt_ace_list[j].trustee) &&
2975
(i_flags_ni == 0) &&
2976
(j_flags_ni == (SEC_ACE_FLAG_OBJECT_INHERIT|
2977
SEC_ACE_FLAG_CONTAINER_INHERIT|
2978
SEC_ACE_FLAG_INHERIT_ONLY))) {
2980
* W2K wants to have access allowed zero access ACE's
2981
* at the end of the list. If the mask is zero, merge
2982
* the non-inherited ACE onto the inherited ACE.
2985
if (nt_ace_list[i].access_mask == 0) {
2986
nt_ace_list[j].flags = SEC_ACE_FLAG_OBJECT_INHERIT|SEC_ACE_FLAG_CONTAINER_INHERIT|
2987
(i_inh ? SEC_ACE_FLAG_INHERITED_ACE : 0);
2988
if (num_aces - i - 1 > 0)
2989
memmove(&nt_ace_list[i], &nt_ace_list[i+1], (num_aces-i-1) *
2992
DEBUG(10,("merge_default_aces: Merging zero access ACE %u onto ACE %u.\n",
2993
(unsigned int)i, (unsigned int)j ));
2996
* These are identical except for the flags.
2997
* Merge the inherited ACE onto the non-inherited ACE.
3000
nt_ace_list[i].flags = SEC_ACE_FLAG_OBJECT_INHERIT|SEC_ACE_FLAG_CONTAINER_INHERIT|
3001
(i_inh ? SEC_ACE_FLAG_INHERITED_ACE : 0);
3002
if (num_aces - j - 1 > 0)
3003
memmove(&nt_ace_list[j], &nt_ace_list[j+1], (num_aces-j-1) *
3006
DEBUG(10,("merge_default_aces: Merging ACE %u onto ACE %u.\n",
3007
(unsigned int)j, (unsigned int)i ));
3019
* Add or Replace ACE entry.
3020
* In some cases we need to add a specific ACE for compatibility reasons.
3021
* When doing that we must make sure we are not actually creating a duplicate
3022
* entry. So we need to search whether an ACE entry already exist and eventually
3023
* replacce the access mask, or add a completely new entry if none was found.
3025
* This function assumes the array has enough space to add a new entry without
3026
* any reallocation of memory.
3029
static void add_or_replace_ace(SEC_ACE *nt_ace_list, size_t *num_aces,
3030
const DOM_SID *sid, enum security_ace_type type,
3031
uint32_t mask, uint8_t flags)
3035
/* first search for a duplicate */
3036
for (i = 0; i < *num_aces; i++) {
3037
if (sid_equal(&nt_ace_list[i].trustee, sid) &&
3038
(nt_ace_list[i].flags == flags)) break;
3041
if (i < *num_aces) { /* found */
3042
nt_ace_list[i].type = type;
3043
nt_ace_list[i].access_mask = mask;
3044
DEBUG(10, ("Replacing ACE %d with SID %s and flags %02x\n",
3045
i, sid_string_dbg(sid), flags));
3049
/* not found, append it */
3050
init_sec_ace(&nt_ace_list[(*num_aces)++], sid, type, mask, flags);
3054
/****************************************************************************
3055
Reply to query a security descriptor from an fsp. If it succeeds it allocates
3056
the space for the return elements and returns the size needed to return the
3057
security descriptor. This should be the only external function needed for
3058
the UNIX style get ACL.
3059
****************************************************************************/
3061
static NTSTATUS posix_get_nt_acl_common(struct connection_struct *conn,
3063
const SMB_STRUCT_STAT *sbuf,
3064
struct pai_val *pal,
3065
SMB_ACL_T posix_acl,
3067
uint32_t security_info,
3073
SEC_ACL *psa = NULL;
3074
size_t num_acls = 0;
3075
size_t num_def_acls = 0;
3076
size_t num_aces = 0;
3077
canon_ace *file_ace = NULL;
3078
canon_ace *dir_ace = NULL;
3079
SEC_ACE *nt_ace_list = NULL;
3080
size_t num_profile_acls = 0;
3081
DOM_SID orig_owner_sid;
3082
SEC_DESC *psd = NULL;
3086
* Get the owner, group and world SIDs.
3089
create_file_sids(sbuf, &owner_sid, &group_sid);
3091
if (lp_profile_acls(SNUM(conn))) {
3092
/* For WXP SP1 the owner must be administrators. */
3093
sid_copy(&orig_owner_sid, &owner_sid);
3094
sid_copy(&owner_sid, &global_sid_Builtin_Administrators);
3095
sid_copy(&group_sid, &global_sid_Builtin_Users);
3096
num_profile_acls = 3;
3099
if ((security_info & DACL_SECURITY_INFORMATION) && !(security_info & PROTECTED_DACL_SECURITY_INFORMATION)) {
3102
* In the optimum case Creator Owner and Creator Group would be used for
3103
* the ACL_USER_OBJ and ACL_GROUP_OBJ entries, respectively, but this
3104
* would lead to usability problems under Windows: The Creator entries
3105
* are only available in browse lists of directories and not for files;
3106
* additionally the identity of the owning group couldn't be determined.
3107
* We therefore use those identities only for Default ACLs.
3110
/* Create the canon_ace lists. */
3111
file_ace = canonicalise_acl(conn, name, posix_acl, sbuf,
3112
&owner_sid, &group_sid, pal,
3113
SMB_ACL_TYPE_ACCESS);
3115
/* We must have *some* ACLS. */
3117
if (count_canon_ace_list(file_ace) == 0) {
3118
DEBUG(0,("get_nt_acl : No ACLs on file (%s) !\n", name));
3122
if (S_ISDIR(sbuf->st_mode) && def_acl) {
3123
dir_ace = canonicalise_acl(conn, name, def_acl,
3125
&global_sid_Creator_Owner,
3126
&global_sid_Creator_Group,
3127
pal, SMB_ACL_TYPE_DEFAULT);
3131
* Create the NT ACE list from the canonical ace lists.
3136
enum security_ace_type nt_acl_type;
3138
if (nt4_compatible_acls() && dir_ace) {
3140
* NT 4 chokes if an ACL contains an INHERIT_ONLY entry
3141
* but no non-INHERIT_ONLY entry for one SID. So we only
3142
* remove entries from the Access ACL if the
3143
* corresponding Default ACL entries have also been
3144
* removed. ACEs for CREATOR-OWNER and CREATOR-GROUP
3145
* are exceptions. We can do nothing
3146
* intelligent if the Default ACL contains entries that
3147
* are not also contained in the Access ACL, so this
3148
* case will still fail under NT 4.
3151
ace = canon_ace_entry_for(dir_ace, SMB_ACL_OTHER, NULL);
3152
if (ace && !ace->perms) {
3153
DLIST_REMOVE(dir_ace, ace);
3156
ace = canon_ace_entry_for(file_ace, SMB_ACL_OTHER, NULL);
3157
if (ace && !ace->perms) {
3158
DLIST_REMOVE(file_ace, ace);
3164
* WinNT doesn't usually have Creator Group
3165
* in browse lists, so we send this entry to
3166
* WinNT even if it contains no relevant
3167
* permissions. Once we can add
3168
* Creator Group to browse lists we can
3173
ace = canon_ace_entry_for(dir_ace, SMB_ACL_GROUP_OBJ, NULL);
3174
if (ace && !ace->perms) {
3175
DLIST_REMOVE(dir_ace, ace);
3180
ace = canon_ace_entry_for(file_ace, SMB_ACL_GROUP_OBJ, NULL);
3181
if (ace && !ace->perms) {
3182
DLIST_REMOVE(file_ace, ace);
3187
num_acls = count_canon_ace_list(file_ace);
3188
num_def_acls = count_canon_ace_list(dir_ace);
3190
/* Allocate the ace list. */
3191
if ((nt_ace_list = SMB_MALLOC_ARRAY(SEC_ACE,num_acls + num_profile_acls + num_def_acls)) == NULL) {
3192
DEBUG(0,("get_nt_acl: Unable to malloc space for nt_ace_list.\n"));
3196
memset(nt_ace_list, '\0', (num_acls + num_def_acls) * sizeof(SEC_ACE) );
3199
* Create the NT ACE list from the canonical ace lists.
3202
for (ace = file_ace; ace != NULL; ace = ace->next) {
3203
uint32_t acc = map_canon_ace_perms(SNUM(conn),
3206
S_ISDIR(sbuf->st_mode));
3207
init_sec_ace(&nt_ace_list[num_aces++],
3214
/* The User must have access to a profile share - even
3215
* if we can't map the SID. */
3216
if (lp_profile_acls(SNUM(conn))) {
3217
add_or_replace_ace(nt_ace_list, &num_aces,
3218
&global_sid_Builtin_Users,
3219
SEC_ACE_TYPE_ACCESS_ALLOWED,
3220
FILE_GENERIC_ALL, 0);
3223
for (ace = dir_ace; ace != NULL; ace = ace->next) {
3224
uint32_t acc = map_canon_ace_perms(SNUM(conn),
3227
S_ISDIR(sbuf->st_mode));
3228
init_sec_ace(&nt_ace_list[num_aces++],
3233
SEC_ACE_FLAG_OBJECT_INHERIT|
3234
SEC_ACE_FLAG_CONTAINER_INHERIT|
3235
SEC_ACE_FLAG_INHERIT_ONLY);
3238
/* The User must have access to a profile share - even
3239
* if we can't map the SID. */
3240
if (lp_profile_acls(SNUM(conn))) {
3241
add_or_replace_ace(nt_ace_list, &num_aces,
3242
&global_sid_Builtin_Users,
3243
SEC_ACE_TYPE_ACCESS_ALLOWED,
3245
SEC_ACE_FLAG_OBJECT_INHERIT |
3246
SEC_ACE_FLAG_CONTAINER_INHERIT |
3247
SEC_ACE_FLAG_INHERIT_ONLY);
3251
* Merge POSIX default ACLs and normal ACLs into one NT ACE.
3252
* Win2K needs this to get the inheritance correct when replacing ACLs
3253
* on a directory tree. Based on work by Jim @ IBM.
3256
num_aces = merge_default_aces(nt_ace_list, num_aces);
3258
if (lp_profile_acls(SNUM(conn))) {
3259
for (i = 0; i < num_aces; i++) {
3260
if (sid_equal(&nt_ace_list[i].trustee, &owner_sid)) {
3261
add_or_replace_ace(nt_ace_list, &num_aces,
3263
nt_ace_list[i].type,
3264
nt_ace_list[i].access_mask,
3265
nt_ace_list[i].flags);
3273
if((psa = make_sec_acl( talloc_tos(), NT4_ACL_REVISION, num_aces, nt_ace_list)) == NULL) {
3274
DEBUG(0,("get_nt_acl: Unable to malloc space for acl.\n"));
3278
} /* security_info & DACL_SECURITY_INFORMATION */
3280
psd = make_standard_sec_desc( talloc_tos(),
3281
(security_info & OWNER_SECURITY_INFORMATION) ? &owner_sid : NULL,
3282
(security_info & GROUP_SECURITY_INFORMATION) ? &group_sid : NULL,
3287
DEBUG(0,("get_nt_acl: Unable to malloc space for security descriptor.\n"));
3293
* Windows 2000: The DACL_PROTECTED flag in the security
3294
* descriptor marks the ACL as non-inheriting, i.e., no
3295
* ACEs from higher level directories propagate to this
3296
* ACL. In the POSIX ACL model permissions are only
3297
* inherited at file create time, so ACLs never contain
3298
* any ACEs that are inherited dynamically. The DACL_PROTECTED
3299
* flag doesn't seem to bother Windows NT.
3300
* Always set this if map acl inherit is turned off.
3302
if (pal == NULL || !lp_map_acl_inherit(SNUM(conn))) {
3303
psd->type |= SEC_DESC_DACL_PROTECTED;
3305
psd->type |= pal->sd_type;
3309
dacl_sort_into_canonical_order(psd->dacl->aces, (unsigned int)psd->dacl->num_aces);
3317
SMB_VFS_SYS_ACL_FREE_ACL(conn, posix_acl);
3320
SMB_VFS_SYS_ACL_FREE_ACL(conn, def_acl);
3322
free_canon_ace_list(file_ace);
3323
free_canon_ace_list(dir_ace);
3324
free_inherited_info(pal);
3325
SAFE_FREE(nt_ace_list);
3327
return NT_STATUS_OK;
3330
NTSTATUS posix_fget_nt_acl(struct files_struct *fsp, uint32_t security_info,
3333
SMB_STRUCT_STAT sbuf;
3334
SMB_ACL_T posix_acl = NULL;
3335
struct pai_val *pal;
3339
DEBUG(10,("posix_fget_nt_acl: called for file %s\n", fsp->fsp_name ));
3341
/* can it happen that fsp_name == NULL ? */
3342
if (fsp->is_directory || fsp->fh->fd == -1) {
3343
return posix_get_nt_acl(fsp->conn, fsp->fsp_name,
3344
security_info, ppdesc);
3347
/* Get the stat struct for the owner info. */
3348
if(SMB_VFS_FSTAT(fsp, &sbuf) != 0) {
3349
return map_nt_error_from_unix(errno);
3352
/* Get the ACL from the fd. */
3353
posix_acl = SMB_VFS_SYS_ACL_GET_FD(fsp);
3355
pal = fload_inherited_info(fsp);
3357
return posix_get_nt_acl_common(fsp->conn, fsp->fsp_name, &sbuf, pal,
3358
posix_acl, NULL, security_info, ppdesc);
3361
NTSTATUS posix_get_nt_acl(struct connection_struct *conn, const char *name,
3362
uint32_t security_info, SEC_DESC **ppdesc)
3364
SMB_STRUCT_STAT sbuf;
3365
SMB_ACL_T posix_acl = NULL;
3366
SMB_ACL_T def_acl = NULL;
3367
struct pai_val *pal;
3372
DEBUG(10,("posix_get_nt_acl: called for file %s\n", name ));
3374
/* Get the stat struct for the owner info. */
3375
if (lp_posix_pathnames()) {
3376
ret = SMB_VFS_LSTAT(conn, name, &sbuf);
3378
ret = SMB_VFS_STAT(conn, name, &sbuf);
3381
return map_nt_error_from_unix(errno);
3384
/* Get the ACL from the path. */
3385
posix_acl = SMB_VFS_SYS_ACL_GET_FILE(conn, name, SMB_ACL_TYPE_ACCESS);
3387
/* If it's a directory get the default POSIX ACL. */
3388
if(S_ISDIR(sbuf.st_mode)) {
3389
def_acl = SMB_VFS_SYS_ACL_GET_FILE(conn, name, SMB_ACL_TYPE_DEFAULT);
3390
def_acl = free_empty_sys_acl(conn, def_acl);
3393
pal = load_inherited_info(conn, name);
3395
return posix_get_nt_acl_common(conn, name, &sbuf, pal, posix_acl,
3396
def_acl, security_info, ppdesc);
3399
/****************************************************************************
3400
Try to chown a file. We will be able to chown it under the following conditions.
3402
1) If we have root privileges, then it will just work.
3403
2) If we have SeTakeOwnershipPrivilege we can change the user to the current user.
3404
3) If we have SeRestorePrivilege we can change the user to any other user.
3405
4) If we have write permission to the file and dos_filemodes is set
3406
then allow chown to the currently authenticated user.
3407
****************************************************************************/
3409
int try_chown(connection_struct *conn, const char *fname, uid_t uid, gid_t gid)
3414
bool posix_paths = lp_posix_pathnames();
3416
if(!CAN_WRITE(conn)) {
3421
/* try the direct way first */
3423
ret = SMB_VFS_LCHOWN(conn, fname, uid, gid);
3425
ret = SMB_VFS_CHOWN(conn, fname, uid, gid);
3430
/* Case (2) / (3) */
3431
if (lp_enable_privileges()) {
3433
bool has_take_ownership_priv = user_has_privileges(current_user.nt_user_token,
3434
&se_take_ownership);
3435
bool has_restore_priv = user_has_privileges(current_user.nt_user_token,
3439
if ( ( has_take_ownership_priv && ( uid == current_user.ut.uid ) ) ||
3441
( has_restore_priv ) ) {
3444
/* Keep the current file gid the same - take ownership doesn't imply group change. */
3445
ret = SMB_VFS_CHOWN(conn, fname, uid, (gid_t)-1);
3452
if (!lp_dos_filemode(SNUM(conn))) {
3457
/* only allow chown to the current user. This is more secure,
3458
and also copes with the case where the SID in a take ownership ACL is
3459
a local SID on the users workstation
3461
if (uid != current_user.ut.uid) {
3467
ret = SMB_VFS_LSTAT(conn,fname,&st);
3469
ret = SMB_VFS_STAT(conn,fname,&st);
3475
if (!NT_STATUS_IS_OK(open_file_fchmod(NULL, conn, fname, &st, &fsp))) {
3480
/* Keep the current file gid the same. */
3481
ret = SMB_VFS_FCHOWN(fsp, uid, (gid_t)-1);
3484
close_file_fchmod(NULL, fsp);
3490
/* Disable this - prevents ACL inheritance from the ACL editor. JRA. */
3492
/****************************************************************************
3493
Take care of parent ACL inheritance.
3494
****************************************************************************/
3496
NTSTATUS append_parent_acl(files_struct *fsp,
3497
const SEC_DESC *pcsd,
3498
SEC_DESC **pp_new_sd)
3500
SEC_DESC *parent_sd = NULL;
3501
files_struct *parent_fsp = NULL;
3502
TALLOC_CTX *mem_ctx = talloc_tos();
3503
char *parent_name = NULL;
3504
SEC_ACE *new_ace = NULL;
3505
unsigned int num_aces = pcsd->dacl->num_aces;
3506
SMB_STRUCT_STAT sbuf;
3510
SEC_DESC *psd = dup_sec_desc(talloc_tos(), pcsd);
3511
bool is_dacl_protected = (pcsd->type & SEC_DESC_DACL_PROTECTED);
3516
return NT_STATUS_NO_MEMORY;
3519
if (!parent_dirname(mem_ctx, fsp->fsp_name, &parent_name, NULL)) {
3520
return NT_STATUS_NO_MEMORY;
3523
status = SMB_VFS_CREATE_FILE(
3524
fsp->conn, /* conn */
3526
0, /* root_dir_fid */
3527
parent_name, /* fname */
3528
0, /* create_file_flags */
3529
FILE_READ_ATTRIBUTES, /* access_mask */
3530
FILE_SHARE_NONE, /* share_access */
3531
FILE_OPEN, /* create_disposition*/
3532
FILE_DIRECTORY_FILE, /* create_options */
3533
0, /* file_attributes */
3534
INTERNAL_OPEN_ONLY, /* oplock_request */
3535
0, /* allocation_size */
3538
&parent_fsp, /* result */
3542
if (!NT_STATUS_IS_OK(status)) {
3546
status = SMB_VFS_GET_NT_ACL(parent_fsp->conn, parent_fsp->fsp_name,
3547
DACL_SECURITY_INFORMATION, &parent_sd );
3549
close_file(NULL, parent_fsp, NORMAL_CLOSE);
3551
if (!NT_STATUS_IS_OK(status)) {
3556
* Make room for potentially all the ACLs from
3557
* the parent. We used to add the ugw triple here,
3558
* as we knew we were dealing with POSIX ACLs.
3559
* We no longer need to do so as we can guarentee
3560
* that a default ACL from the parent directory will
3561
* be well formed for POSIX ACLs if it came from a
3562
* POSIX ACL source, and if we're not writing to a
3563
* POSIX ACL sink then we don't care if it's not well
3567
num_aces += parent_sd->dacl->num_aces;
3569
if((new_ace = TALLOC_ZERO_ARRAY(mem_ctx, SEC_ACE,
3570
num_aces)) == NULL) {
3571
return NT_STATUS_NO_MEMORY;
3574
/* Start by copying in all the given ACE entries. */
3575
for (i = 0; i < psd->dacl->num_aces; i++) {
3576
sec_ace_copy(&new_ace[i], &psd->dacl->aces[i]);
3580
* Note that we're ignoring "inherit permissions" here
3581
* as that really only applies to newly created files. JRA.
3584
/* Finally append any inherited ACEs. */
3585
for (j = 0; j < parent_sd->dacl->num_aces; j++) {
3586
SEC_ACE *se = &parent_sd->dacl->aces[j];
3588
if (fsp->is_directory) {
3589
if (!(se->flags & SEC_ACE_FLAG_CONTAINER_INHERIT)) {
3590
/* Doesn't apply to a directory - ignore. */
3591
DEBUG(10,("append_parent_acl: directory %s "
3592
"ignoring non container "
3593
"inherit flags %u on ACE with sid %s "
3596
(unsigned int)se->flags,
3597
sid_string_dbg(&se->trustee),
3602
if (!(se->flags & SEC_ACE_FLAG_OBJECT_INHERIT)) {
3603
/* Doesn't apply to a file - ignore. */
3604
DEBUG(10,("append_parent_acl: file %s "
3605
"ignoring non object "
3606
"inherit flags %u on ACE with sid %s "
3609
(unsigned int)se->flags,
3610
sid_string_dbg(&se->trustee),
3616
if (is_dacl_protected) {
3617
/* If the DACL is protected it means we must
3618
* not overwrite an existing ACE entry with the
3619
* same SID. This is order N^2. Ouch :-(. JRA. */
3621
for (k = 0; k < psd->dacl->num_aces; k++) {
3622
if (sid_equal(&psd->dacl->aces[k].trustee,
3627
if (k < psd->dacl->num_aces) {
3628
/* SID matched. Ignore. */
3629
DEBUG(10,("append_parent_acl: path %s "
3630
"ignoring ACE with protected sid %s "
3633
sid_string_dbg(&se->trustee),
3639
sec_ace_copy(&new_ace[i], se);
3640
if (se->flags & SEC_ACE_FLAG_NO_PROPAGATE_INHERIT) {
3641
new_ace[i].flags &= ~(SEC_ACE_FLAG_VALID_INHERIT);
3643
new_ace[i].flags |= SEC_ACE_FLAG_INHERITED_ACE;
3645
if (fsp->is_directory) {
3647
* Strip off any inherit only. It's applied.
3649
new_ace[i].flags &= ~(SEC_ACE_FLAG_INHERIT_ONLY);
3650
if (se->flags & SEC_ACE_FLAG_NO_PROPAGATE_INHERIT) {
3651
/* No further inheritance. */
3653
~(SEC_ACE_FLAG_CONTAINER_INHERIT|
3654
SEC_ACE_FLAG_OBJECT_INHERIT);
3658
* Strip off any container or inherit
3659
* flags, they can't apply to objects.
3661
new_ace[i].flags &= ~(SEC_ACE_FLAG_CONTAINER_INHERIT|
3662
SEC_ACE_FLAG_INHERIT_ONLY|
3663
SEC_ACE_FLAG_NO_PROPAGATE_INHERIT);
3667
DEBUG(10,("append_parent_acl: path %s "
3668
"inheriting ACE with sid %s "
3671
sid_string_dbg(&se->trustee),
3675
psd->dacl->aces = new_ace;
3676
psd->dacl->num_aces = i;
3677
psd->type &= ~(SE_DESC_DACL_AUTO_INHERITED|
3678
SE_DESC_DACL_AUTO_INHERIT_REQ);
3685
/****************************************************************************
3686
Reply to set a security descriptor on an fsp. security_info_sent is the
3687
description of the following NT ACL.
3688
This should be the only external function needed for the UNIX style set ACL.
3689
****************************************************************************/
3691
NTSTATUS set_nt_acl(files_struct *fsp, uint32 security_info_sent, const SEC_DESC *psd)
3693
connection_struct *conn = fsp->conn;
3694
uid_t user = (uid_t)-1;
3695
gid_t grp = (gid_t)-1;
3696
SMB_STRUCT_STAT sbuf;
3697
DOM_SID file_owner_sid;
3698
DOM_SID file_grp_sid;
3699
canon_ace *file_ace_list = NULL;
3700
canon_ace *dir_ace_list = NULL;
3701
bool acl_perms = False;
3702
mode_t orig_mode = (mode_t)0;
3704
bool set_acl_as_root = false;
3705
bool acl_set_support = false;
3707
bool posix_paths = lp_posix_pathnames();
3710
DEBUG(10,("set_nt_acl: called for file %s\n", fsp->fsp_name ));
3712
if (!CAN_WRITE(conn)) {
3713
DEBUG(10,("set acl rejected on read-only share\n"));
3714
return NT_STATUS_MEDIA_WRITE_PROTECTED;
3718
* Get the current state of the file.
3721
if(fsp->is_directory || fsp->fh->fd == -1) {
3723
sret = SMB_VFS_LSTAT(fsp->conn,fsp->fsp_name, &sbuf);
3725
sret = SMB_VFS_STAT(fsp->conn,fsp->fsp_name, &sbuf);
3728
return map_nt_error_from_unix(errno);
3731
if(SMB_VFS_FSTAT(fsp, &sbuf) != 0)
3732
return map_nt_error_from_unix(errno);
3735
/* Save the original element we check against. */
3736
orig_mode = sbuf.st_mode;
3739
* Unpack the user/group/world id's.
3742
status = unpack_nt_owners( SNUM(conn), &user, &grp, security_info_sent, psd);
3743
if (!NT_STATUS_IS_OK(status)) {
3748
* Do we need to chown ? If so this must be done first as the incoming
3749
* CREATOR_OWNER acl will be relative to the *new* owner, not the old.
3753
if (((user != (uid_t)-1) && (sbuf.st_uid != user)) || (( grp != (gid_t)-1) && (sbuf.st_gid != grp))) {
3755
DEBUG(3,("set_nt_acl: chown %s. uid = %u, gid = %u.\n",
3756
fsp->fsp_name, (unsigned int)user, (unsigned int)grp ));
3758
if(try_chown( fsp->conn, fsp->fsp_name, user, grp) == -1) {
3759
DEBUG(3,("set_nt_acl: chown %s, %u, %u failed. Error = %s.\n",
3760
fsp->fsp_name, (unsigned int)user, (unsigned int)grp, strerror(errno) ));
3761
if (errno == EPERM) {
3762
return NT_STATUS_INVALID_OWNER;
3764
return map_nt_error_from_unix(errno);
3768
* Recheck the current state of the file, which may have changed.
3769
* (suid/sgid bits, for instance)
3772
if(fsp->is_directory) {
3774
sret = SMB_VFS_LSTAT(fsp->conn, fsp->fsp_name, &sbuf);
3776
sret = SMB_VFS_STAT(fsp->conn, fsp->fsp_name, &sbuf);
3779
return map_nt_error_from_unix(errno);
3782
if(fsp->fh->fd == -1) {
3784
sret = SMB_VFS_LSTAT(fsp->conn, fsp->fsp_name, &sbuf);
3786
sret = SMB_VFS_STAT(fsp->conn, fsp->fsp_name, &sbuf);
3789
sret = SMB_VFS_FSTAT(fsp, &sbuf);
3793
return map_nt_error_from_unix(errno);
3796
/* Save the original element we check against. */
3797
orig_mode = sbuf.st_mode;
3799
/* If we successfully chowned, we know we must
3800
* be able to set the acl, so do it as root.
3802
set_acl_as_root = true;
3805
create_file_sids(&sbuf, &file_owner_sid, &file_grp_sid);
3807
acl_perms = unpack_canon_ace( fsp, &sbuf, &file_owner_sid, &file_grp_sid,
3808
&file_ace_list, &dir_ace_list, security_info_sent, psd);
3810
/* Ignore W2K traverse DACL set. */
3811
if (!file_ace_list && !dir_ace_list) {
3812
return NT_STATUS_OK;
3816
DEBUG(3,("set_nt_acl: cannot set permissions\n"));
3817
free_canon_ace_list(file_ace_list);
3818
free_canon_ace_list(dir_ace_list);
3819
return NT_STATUS_ACCESS_DENIED;
3823
* Only change security if we got a DACL.
3826
if(!(security_info_sent & DACL_SECURITY_INFORMATION) || (psd->dacl == NULL)) {
3827
free_canon_ace_list(file_ace_list);
3828
free_canon_ace_list(dir_ace_list);
3829
return NT_STATUS_OK;
3833
* Try using the POSIX ACL set first. Fall back to chmod if
3834
* we have no ACL support on this filesystem.
3837
if (acl_perms && file_ace_list) {
3838
if (set_acl_as_root) {
3841
ret = set_canon_ace_list(fsp, file_ace_list, False, &sbuf, &acl_set_support);
3842
if (set_acl_as_root) {
3845
if (acl_set_support && ret == false) {
3846
DEBUG(3,("set_nt_acl: failed to set file acl on file %s (%s).\n", fsp->fsp_name, strerror(errno) ));
3847
free_canon_ace_list(file_ace_list);
3848
free_canon_ace_list(dir_ace_list);
3849
return map_nt_error_from_unix(errno);
3853
if (acl_perms && acl_set_support && fsp->is_directory) {
3855
if (set_acl_as_root) {
3858
ret = set_canon_ace_list(fsp, dir_ace_list, True, &sbuf, &acl_set_support);
3859
if (set_acl_as_root) {
3863
DEBUG(3,("set_nt_acl: failed to set default acl on directory %s (%s).\n", fsp->fsp_name, strerror(errno) ));
3864
free_canon_ace_list(file_ace_list);
3865
free_canon_ace_list(dir_ace_list);
3866
return map_nt_error_from_unix(errno);
3870
* No default ACL - delete one if it exists.
3873
if (set_acl_as_root) {
3876
sret = SMB_VFS_SYS_ACL_DELETE_DEF_FILE(conn, fsp->fsp_name);
3877
if (set_acl_as_root) {
3881
if (acl_group_override(conn, &sbuf, fsp->fsp_name)) {
3882
DEBUG(5,("set_nt_acl: acl group control on and "
3883
"current user in file %s primary group. Override delete_def_acl\n",
3887
sret = SMB_VFS_SYS_ACL_DELETE_DEF_FILE(conn, fsp->fsp_name);
3892
DEBUG(3,("set_nt_acl: sys_acl_delete_def_file failed (%s)\n", strerror(errno)));
3893
free_canon_ace_list(file_ace_list);
3894
free_canon_ace_list(dir_ace_list);
3895
return map_nt_error_from_unix(errno);
3901
if (acl_set_support) {
3902
if (set_acl_as_root) {
3905
store_inheritance_attributes(fsp,
3909
if (set_acl_as_root) {
3915
* If we cannot set using POSIX ACLs we fall back to checking if we need to chmod.
3918
if(!acl_set_support && acl_perms) {
3921
if (!convert_canon_ace_to_posix_perms( fsp, file_ace_list, &posix_perms)) {
3922
free_canon_ace_list(file_ace_list);
3923
free_canon_ace_list(dir_ace_list);
3924
DEBUG(3,("set_nt_acl: failed to convert file acl to posix permissions for file %s.\n",
3926
return NT_STATUS_ACCESS_DENIED;
3929
if (orig_mode != posix_perms) {
3930
DEBUG(3,("set_nt_acl: chmod %s. perms = 0%o.\n",
3931
fsp->fsp_name, (unsigned int)posix_perms ));
3933
if (set_acl_as_root) {
3936
sret = SMB_VFS_CHMOD(conn,fsp->fsp_name, posix_perms);
3937
if (set_acl_as_root) {
3941
if (acl_group_override(conn, &sbuf, fsp->fsp_name)) {
3942
DEBUG(5,("set_nt_acl: acl group control on and "
3943
"current user in file %s primary group. Override chmod\n",
3947
sret = SMB_VFS_CHMOD(conn,fsp->fsp_name, posix_perms);
3952
DEBUG(3,("set_nt_acl: chmod %s, 0%o failed. Error = %s.\n",
3953
fsp->fsp_name, (unsigned int)posix_perms, strerror(errno) ));
3954
free_canon_ace_list(file_ace_list);
3955
free_canon_ace_list(dir_ace_list);
3956
return map_nt_error_from_unix(errno);
3962
free_canon_ace_list(file_ace_list);
3963
free_canon_ace_list(dir_ace_list);
3965
return NT_STATUS_OK;
3968
/****************************************************************************
3969
Get the actual group bits stored on a file with an ACL. Has no effect if
3970
the file has no ACL. Needed in dosmode code where the stat() will return
3971
the mask bits, not the real group bits, for a file with an ACL.
3972
****************************************************************************/
3974
int get_acl_group_bits( connection_struct *conn, const char *fname, mode_t *mode )
3976
int entry_id = SMB_ACL_FIRST_ENTRY;
3977
SMB_ACL_ENTRY_T entry;
3978
SMB_ACL_T posix_acl;
3981
posix_acl = SMB_VFS_SYS_ACL_GET_FILE(conn, fname, SMB_ACL_TYPE_ACCESS);
3982
if (posix_acl == (SMB_ACL_T)NULL)
3985
while (SMB_VFS_SYS_ACL_GET_ENTRY(conn, posix_acl, entry_id, &entry) == 1) {
3986
SMB_ACL_TAG_T tagtype;
3987
SMB_ACL_PERMSET_T permset;
3989
entry_id = SMB_ACL_NEXT_ENTRY;
3991
if (SMB_VFS_SYS_ACL_GET_TAG_TYPE(conn, entry, &tagtype) ==-1)
3994
if (tagtype == SMB_ACL_GROUP_OBJ) {
3995
if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, entry, &permset) == -1) {
3998
*mode &= ~(S_IRGRP|S_IWGRP|S_IXGRP);
3999
*mode |= (SMB_VFS_SYS_ACL_GET_PERM(conn, permset, SMB_ACL_READ) ? S_IRGRP : 0);
4000
*mode |= (SMB_VFS_SYS_ACL_GET_PERM(conn, permset, SMB_ACL_WRITE) ? S_IWGRP : 0);
4001
*mode |= (SMB_VFS_SYS_ACL_GET_PERM(conn, permset, SMB_ACL_EXECUTE) ? S_IXGRP : 0);
4007
SMB_VFS_SYS_ACL_FREE_ACL(conn, posix_acl);
4011
/****************************************************************************
4012
Do a chmod by setting the ACL USER_OBJ, GROUP_OBJ and OTHER bits in an ACL
4013
and set the mask to rwx. Needed to preserve complex ACLs set by NT.
4014
****************************************************************************/
4016
static int chmod_acl_internals( connection_struct *conn, SMB_ACL_T posix_acl, mode_t mode)
4018
int entry_id = SMB_ACL_FIRST_ENTRY;
4019
SMB_ACL_ENTRY_T entry;
4020
int num_entries = 0;
4022
while ( SMB_VFS_SYS_ACL_GET_ENTRY(conn, posix_acl, entry_id, &entry) == 1) {
4023
SMB_ACL_TAG_T tagtype;
4024
SMB_ACL_PERMSET_T permset;
4027
entry_id = SMB_ACL_NEXT_ENTRY;
4029
if (SMB_VFS_SYS_ACL_GET_TAG_TYPE(conn, entry, &tagtype) == -1)
4032
if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, entry, &permset) == -1)
4038
case SMB_ACL_USER_OBJ:
4039
perms = unix_perms_to_acl_perms(mode, S_IRUSR, S_IWUSR, S_IXUSR);
4041
case SMB_ACL_GROUP_OBJ:
4042
perms = unix_perms_to_acl_perms(mode, S_IRGRP, S_IWGRP, S_IXGRP);
4046
* FIXME: The ACL_MASK entry permissions should really be set to
4047
* the union of the permissions of all ACL_USER,
4048
* ACL_GROUP_OBJ, and ACL_GROUP entries. That's what
4049
* acl_calc_mask() does, but Samba ACLs doesn't provide it.
4051
perms = S_IRUSR|S_IWUSR|S_IXUSR;
4054
perms = unix_perms_to_acl_perms(mode, S_IROTH, S_IWOTH, S_IXOTH);
4060
if (map_acl_perms_to_permset(conn, perms, &permset) == -1)
4063
if (SMB_VFS_SYS_ACL_SET_PERMSET(conn, entry, permset) == -1)
4068
* If this is a simple 3 element ACL or no elements then it's a standard
4069
* UNIX permission set. Just use chmod...
4072
if ((num_entries == 3) || (num_entries == 0))
4078
/****************************************************************************
4079
Get the access ACL of FROM, do a chmod by setting the ACL USER_OBJ,
4080
GROUP_OBJ and OTHER bits in an ACL and set the mask to rwx. Set the
4081
resulting ACL on TO. Note that name is in UNIX character set.
4082
****************************************************************************/
4084
static int copy_access_posix_acl(connection_struct *conn, const char *from, const char *to, mode_t mode)
4086
SMB_ACL_T posix_acl = NULL;
4089
if ((posix_acl = SMB_VFS_SYS_ACL_GET_FILE(conn, from, SMB_ACL_TYPE_ACCESS)) == NULL)
4092
if ((ret = chmod_acl_internals(conn, posix_acl, mode)) == -1)
4095
ret = SMB_VFS_SYS_ACL_SET_FILE(conn, to, SMB_ACL_TYPE_ACCESS, posix_acl);
4099
SMB_VFS_SYS_ACL_FREE_ACL(conn, posix_acl);
4103
/****************************************************************************
4104
Do a chmod by setting the ACL USER_OBJ, GROUP_OBJ and OTHER bits in an ACL
4105
and set the mask to rwx. Needed to preserve complex ACLs set by NT.
4106
Note that name is in UNIX character set.
4107
****************************************************************************/
4109
int chmod_acl(connection_struct *conn, const char *name, mode_t mode)
4111
return copy_access_posix_acl(conn, name, name, mode);
4114
/****************************************************************************
4115
Check for an existing default POSIX ACL on a directory.
4116
****************************************************************************/
4118
static bool directory_has_default_posix_acl(connection_struct *conn, const char *fname)
4120
SMB_ACL_T def_acl = SMB_VFS_SYS_ACL_GET_FILE( conn, fname, SMB_ACL_TYPE_DEFAULT);
4121
bool has_acl = False;
4122
SMB_ACL_ENTRY_T entry;
4124
if (def_acl != NULL && (SMB_VFS_SYS_ACL_GET_ENTRY(conn, def_acl, SMB_ACL_FIRST_ENTRY, &entry) == 1)) {
4129
SMB_VFS_SYS_ACL_FREE_ACL(conn, def_acl);
4134
/****************************************************************************
4135
If the parent directory has no default ACL but it does have an Access ACL,
4136
inherit this Access ACL to file name.
4137
****************************************************************************/
4139
int inherit_access_posix_acl(connection_struct *conn, const char *inherit_from_dir,
4140
const char *name, mode_t mode)
4142
if (directory_has_default_posix_acl(conn, inherit_from_dir))
4145
return copy_access_posix_acl(conn, inherit_from_dir, name, mode);
4148
/****************************************************************************
4149
Do an fchmod by setting the ACL USER_OBJ, GROUP_OBJ and OTHER bits in an ACL
4150
and set the mask to rwx. Needed to preserve complex ACLs set by NT.
4151
****************************************************************************/
4153
int fchmod_acl(files_struct *fsp, mode_t mode)
4155
connection_struct *conn = fsp->conn;
4156
SMB_ACL_T posix_acl = NULL;
4159
if ((posix_acl = SMB_VFS_SYS_ACL_GET_FD(fsp)) == NULL)
4162
if ((ret = chmod_acl_internals(conn, posix_acl, mode)) == -1)
4165
ret = SMB_VFS_SYS_ACL_SET_FD(fsp, posix_acl);
4169
SMB_VFS_SYS_ACL_FREE_ACL(conn, posix_acl);
4173
/****************************************************************************
4174
Map from wire type to permset.
4175
****************************************************************************/
4177
static bool unix_ex_wire_to_permset(connection_struct *conn, unsigned char wire_perm, SMB_ACL_PERMSET_T *p_permset)
4179
if (wire_perm & ~(SMB_POSIX_ACL_READ|SMB_POSIX_ACL_WRITE|SMB_POSIX_ACL_EXECUTE)) {
4183
if (SMB_VFS_SYS_ACL_CLEAR_PERMS(conn, *p_permset) == -1) {
4187
if (wire_perm & SMB_POSIX_ACL_READ) {
4188
if (SMB_VFS_SYS_ACL_ADD_PERM(conn, *p_permset, SMB_ACL_READ) == -1) {
4192
if (wire_perm & SMB_POSIX_ACL_WRITE) {
4193
if (SMB_VFS_SYS_ACL_ADD_PERM(conn, *p_permset, SMB_ACL_WRITE) == -1) {
4197
if (wire_perm & SMB_POSIX_ACL_EXECUTE) {
4198
if (SMB_VFS_SYS_ACL_ADD_PERM(conn, *p_permset, SMB_ACL_EXECUTE) == -1) {
4205
/****************************************************************************
4206
Map from wire type to tagtype.
4207
****************************************************************************/
4209
static bool unix_ex_wire_to_tagtype(unsigned char wire_tt, SMB_ACL_TAG_T *p_tt)
4212
case SMB_POSIX_ACL_USER_OBJ:
4213
*p_tt = SMB_ACL_USER_OBJ;
4215
case SMB_POSIX_ACL_USER:
4216
*p_tt = SMB_ACL_USER;
4218
case SMB_POSIX_ACL_GROUP_OBJ:
4219
*p_tt = SMB_ACL_GROUP_OBJ;
4221
case SMB_POSIX_ACL_GROUP:
4222
*p_tt = SMB_ACL_GROUP;
4224
case SMB_POSIX_ACL_MASK:
4225
*p_tt = SMB_ACL_MASK;
4227
case SMB_POSIX_ACL_OTHER:
4228
*p_tt = SMB_ACL_OTHER;
4236
/****************************************************************************
4237
Create a new POSIX acl from wire permissions.
4238
FIXME ! How does the share mask/mode fit into this.... ?
4239
****************************************************************************/
4241
static SMB_ACL_T create_posix_acl_from_wire(connection_struct *conn, uint16 num_acls, const char *pdata)
4244
SMB_ACL_T the_acl = SMB_VFS_SYS_ACL_INIT(conn, num_acls);
4246
if (the_acl == NULL) {
4250
for (i = 0; i < num_acls; i++) {
4251
SMB_ACL_ENTRY_T the_entry;
4252
SMB_ACL_PERMSET_T the_permset;
4253
SMB_ACL_TAG_T tag_type;
4255
if (SMB_VFS_SYS_ACL_CREATE_ENTRY(conn, &the_acl, &the_entry) == -1) {
4256
DEBUG(0,("create_posix_acl_from_wire: Failed to create entry %u. (%s)\n",
4257
i, strerror(errno) ));
4261
if (!unix_ex_wire_to_tagtype(CVAL(pdata,(i*SMB_POSIX_ACL_ENTRY_SIZE)), &tag_type)) {
4262
DEBUG(0,("create_posix_acl_from_wire: invalid wire tagtype %u on entry %u.\n",
4263
CVAL(pdata,(i*SMB_POSIX_ACL_ENTRY_SIZE)), i ));
4267
if (SMB_VFS_SYS_ACL_SET_TAG_TYPE(conn, the_entry, tag_type) == -1) {
4268
DEBUG(0,("create_posix_acl_from_wire: Failed to set tagtype on entry %u. (%s)\n",
4269
i, strerror(errno) ));
4273
/* Get the permset pointer from the new ACL entry. */
4274
if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, the_entry, &the_permset) == -1) {
4275
DEBUG(0,("create_posix_acl_from_wire: Failed to get permset on entry %u. (%s)\n",
4276
i, strerror(errno) ));
4280
/* Map from wire to permissions. */
4281
if (!unix_ex_wire_to_permset(conn, CVAL(pdata,(i*SMB_POSIX_ACL_ENTRY_SIZE)+1), &the_permset)) {
4282
DEBUG(0,("create_posix_acl_from_wire: invalid permset %u on entry %u.\n",
4283
CVAL(pdata,(i*SMB_POSIX_ACL_ENTRY_SIZE) + 1), i ));
4287
/* Now apply to the new ACL entry. */
4288
if (SMB_VFS_SYS_ACL_SET_PERMSET(conn, the_entry, the_permset) == -1) {
4289
DEBUG(0,("create_posix_acl_from_wire: Failed to add permset on entry %u. (%s)\n",
4290
i, strerror(errno) ));
4294
if (tag_type == SMB_ACL_USER) {
4295
uint32 uidval = IVAL(pdata,(i*SMB_POSIX_ACL_ENTRY_SIZE)+2);
4296
uid_t uid = (uid_t)uidval;
4297
if (SMB_VFS_SYS_ACL_SET_QUALIFIER(conn, the_entry,(void *)&uid) == -1) {
4298
DEBUG(0,("create_posix_acl_from_wire: Failed to set uid %u on entry %u. (%s)\n",
4299
(unsigned int)uid, i, strerror(errno) ));
4304
if (tag_type == SMB_ACL_GROUP) {
4305
uint32 gidval = IVAL(pdata,(i*SMB_POSIX_ACL_ENTRY_SIZE)+2);
4306
gid_t gid = (uid_t)gidval;
4307
if (SMB_VFS_SYS_ACL_SET_QUALIFIER(conn, the_entry,(void *)&gid) == -1) {
4308
DEBUG(0,("create_posix_acl_from_wire: Failed to set gid %u on entry %u. (%s)\n",
4309
(unsigned int)gid, i, strerror(errno) ));
4319
if (the_acl != NULL) {
4320
SMB_VFS_SYS_ACL_FREE_ACL(conn, the_acl);
4325
/****************************************************************************
4326
Calls from UNIX extensions - Default POSIX ACL set.
4327
If num_def_acls == 0 and not a directory just return. If it is a directory
4328
and num_def_acls == 0 then remove the default acl. Else set the default acl
4330
****************************************************************************/
4332
bool set_unix_posix_default_acl(connection_struct *conn, const char *fname, SMB_STRUCT_STAT *psbuf,
4333
uint16 num_def_acls, const char *pdata)
4335
SMB_ACL_T def_acl = NULL;
4337
if (!S_ISDIR(psbuf->st_mode)) {
4339
DEBUG(5,("set_unix_posix_default_acl: Can't set default ACL on non-directory file %s\n", fname ));
4347
if (!num_def_acls) {
4348
/* Remove the default ACL. */
4349
if (SMB_VFS_SYS_ACL_DELETE_DEF_FILE(conn, fname) == -1) {
4350
DEBUG(5,("set_unix_posix_default_acl: acl_delete_def_file failed on directory %s (%s)\n",
4351
fname, strerror(errno) ));
4357
if ((def_acl = create_posix_acl_from_wire(conn, num_def_acls, pdata)) == NULL) {
4361
if (SMB_VFS_SYS_ACL_SET_FILE(conn, fname, SMB_ACL_TYPE_DEFAULT, def_acl) == -1) {
4362
DEBUG(5,("set_unix_posix_default_acl: acl_set_file failed on directory %s (%s)\n",
4363
fname, strerror(errno) ));
4364
SMB_VFS_SYS_ACL_FREE_ACL(conn, def_acl);
4368
DEBUG(10,("set_unix_posix_default_acl: set default acl for file %s\n", fname ));
4369
SMB_VFS_SYS_ACL_FREE_ACL(conn, def_acl);
4373
/****************************************************************************
4374
Remove an ACL from a file. As we don't have acl_delete_entry() available
4375
we must read the current acl and copy all entries except MASK, USER and GROUP
4376
to a new acl, then set that. This (at least on Linux) causes any ACL to be
4378
FIXME ! How does the share mask/mode fit into this.... ?
4379
****************************************************************************/
4381
static bool remove_posix_acl(connection_struct *conn, files_struct *fsp, const char *fname)
4383
SMB_ACL_T file_acl = NULL;
4384
int entry_id = SMB_ACL_FIRST_ENTRY;
4385
SMB_ACL_ENTRY_T entry;
4387
/* Create a new ACL with only 3 entries, u/g/w. */
4388
SMB_ACL_T new_file_acl = SMB_VFS_SYS_ACL_INIT(conn, 3);
4389
SMB_ACL_ENTRY_T user_ent = NULL;
4390
SMB_ACL_ENTRY_T group_ent = NULL;
4391
SMB_ACL_ENTRY_T other_ent = NULL;
4393
if (new_file_acl == NULL) {
4394
DEBUG(5,("remove_posix_acl: failed to init new ACL with 3 entries for file %s.\n", fname));
4398
/* Now create the u/g/w entries. */
4399
if (SMB_VFS_SYS_ACL_CREATE_ENTRY(conn, &new_file_acl, &user_ent) == -1) {
4400
DEBUG(5,("remove_posix_acl: Failed to create user entry for file %s. (%s)\n",
4401
fname, strerror(errno) ));
4404
if (SMB_VFS_SYS_ACL_SET_TAG_TYPE(conn, user_ent, SMB_ACL_USER_OBJ) == -1) {
4405
DEBUG(5,("remove_posix_acl: Failed to set user entry for file %s. (%s)\n",
4406
fname, strerror(errno) ));
4410
if (SMB_VFS_SYS_ACL_CREATE_ENTRY(conn, &new_file_acl, &group_ent) == -1) {
4411
DEBUG(5,("remove_posix_acl: Failed to create group entry for file %s. (%s)\n",
4412
fname, strerror(errno) ));
4415
if (SMB_VFS_SYS_ACL_SET_TAG_TYPE(conn, group_ent, SMB_ACL_GROUP_OBJ) == -1) {
4416
DEBUG(5,("remove_posix_acl: Failed to set group entry for file %s. (%s)\n",
4417
fname, strerror(errno) ));
4421
if (SMB_VFS_SYS_ACL_CREATE_ENTRY(conn, &new_file_acl, &other_ent) == -1) {
4422
DEBUG(5,("remove_posix_acl: Failed to create other entry for file %s. (%s)\n",
4423
fname, strerror(errno) ));
4426
if (SMB_VFS_SYS_ACL_SET_TAG_TYPE(conn, other_ent, SMB_ACL_OTHER) == -1) {
4427
DEBUG(5,("remove_posix_acl: Failed to set other entry for file %s. (%s)\n",
4428
fname, strerror(errno) ));
4432
/* Get the current file ACL. */
4433
if (fsp && fsp->fh->fd != -1) {
4434
file_acl = SMB_VFS_SYS_ACL_GET_FD(fsp);
4436
file_acl = SMB_VFS_SYS_ACL_GET_FILE( conn, fname, SMB_ACL_TYPE_ACCESS);
4439
if (file_acl == NULL) {
4440
/* This is only returned if an error occurred. Even for a file with
4441
no acl a u/g/w acl should be returned. */
4442
DEBUG(5,("remove_posix_acl: failed to get ACL from file %s (%s).\n",
4443
fname, strerror(errno) ));
4447
while ( SMB_VFS_SYS_ACL_GET_ENTRY(conn, file_acl, entry_id, &entry) == 1) {
4448
SMB_ACL_TAG_T tagtype;
4449
SMB_ACL_PERMSET_T permset;
4451
entry_id = SMB_ACL_NEXT_ENTRY;
4453
if (SMB_VFS_SYS_ACL_GET_TAG_TYPE(conn, entry, &tagtype) == -1) {
4454
DEBUG(5,("remove_posix_acl: failed to get tagtype from ACL on file %s (%s).\n",
4455
fname, strerror(errno) ));
4459
if (SMB_VFS_SYS_ACL_GET_PERMSET(conn, entry, &permset) == -1) {
4460
DEBUG(5,("remove_posix_acl: failed to get permset from ACL on file %s (%s).\n",
4461
fname, strerror(errno) ));
4465
if (tagtype == SMB_ACL_USER_OBJ) {
4466
if (SMB_VFS_SYS_ACL_SET_PERMSET(conn, user_ent, permset) == -1) {
4467
DEBUG(5,("remove_posix_acl: failed to set permset from ACL on file %s (%s).\n",
4468
fname, strerror(errno) ));
4470
} else if (tagtype == SMB_ACL_GROUP_OBJ) {
4471
if (SMB_VFS_SYS_ACL_SET_PERMSET(conn, group_ent, permset) == -1) {
4472
DEBUG(5,("remove_posix_acl: failed to set permset from ACL on file %s (%s).\n",
4473
fname, strerror(errno) ));
4475
} else if (tagtype == SMB_ACL_OTHER) {
4476
if (SMB_VFS_SYS_ACL_SET_PERMSET(conn, other_ent, permset) == -1) {
4477
DEBUG(5,("remove_posix_acl: failed to set permset from ACL on file %s (%s).\n",
4478
fname, strerror(errno) ));
4483
/* Set the new empty file ACL. */
4484
if (fsp && fsp->fh->fd != -1) {
4485
if (SMB_VFS_SYS_ACL_SET_FD(fsp, new_file_acl) == -1) {
4486
DEBUG(5,("remove_posix_acl: acl_set_file failed on %s (%s)\n",
4487
fname, strerror(errno) ));
4491
if (SMB_VFS_SYS_ACL_SET_FILE(conn, fname, SMB_ACL_TYPE_ACCESS, new_file_acl) == -1) {
4492
DEBUG(5,("remove_posix_acl: acl_set_file failed on %s (%s)\n",
4493
fname, strerror(errno) ));
4503
SMB_VFS_SYS_ACL_FREE_ACL(conn, file_acl);
4506
SMB_VFS_SYS_ACL_FREE_ACL(conn, new_file_acl);
4511
/****************************************************************************
4512
Calls from UNIX extensions - POSIX ACL set.
4513
If num_def_acls == 0 then read/modify/write acl after removing all entries
4514
except SMB_ACL_USER_OBJ, SMB_ACL_GROUP_OBJ, SMB_ACL_OTHER.
4515
****************************************************************************/
4517
bool set_unix_posix_acl(connection_struct *conn, files_struct *fsp, const char *fname, uint16 num_acls, const char *pdata)
4519
SMB_ACL_T file_acl = NULL;
4522
/* Remove the ACL from the file. */
4523
return remove_posix_acl(conn, fsp, fname);
4526
if ((file_acl = create_posix_acl_from_wire(conn, num_acls, pdata)) == NULL) {
4530
if (fsp && fsp->fh->fd != -1) {
4531
/* The preferred way - use an open fd. */
4532
if (SMB_VFS_SYS_ACL_SET_FD(fsp, file_acl) == -1) {
4533
DEBUG(5,("set_unix_posix_acl: acl_set_file failed on %s (%s)\n",
4534
fname, strerror(errno) ));
4535
SMB_VFS_SYS_ACL_FREE_ACL(conn, file_acl);
4539
if (SMB_VFS_SYS_ACL_SET_FILE(conn, fname, SMB_ACL_TYPE_ACCESS, file_acl) == -1) {
4540
DEBUG(5,("set_unix_posix_acl: acl_set_file failed on %s (%s)\n",
4541
fname, strerror(errno) ));
4542
SMB_VFS_SYS_ACL_FREE_ACL(conn, file_acl);
4547
DEBUG(10,("set_unix_posix_acl: set acl for file %s\n", fname ));
4548
SMB_VFS_SYS_ACL_FREE_ACL(conn, file_acl);
4552
/********************************************************************
4553
Pull the NT ACL from a file on disk or the OpenEventlog() access
4554
check. Caller is responsible for freeing the returned security
4555
descriptor via TALLOC_FREE(). This is designed for dealing with
4556
user space access checks in smbd outside of the VFS. For example,
4557
checking access rights in OpenEventlog().
4559
Assume we are dealing with files (for now)
4560
********************************************************************/
4562
SEC_DESC *get_nt_acl_no_snum( TALLOC_CTX *ctx, const char *fname)
4564
SEC_DESC *psd, *ret_sd;
4565
connection_struct *conn;
4567
struct fd_handle fh;
4569
conn = TALLOC_ZERO_P(ctx, connection_struct);
4571
DEBUG(0, ("talloc failed\n"));
4575
if (!(conn->params = TALLOC_P(conn, struct share_params))) {
4576
DEBUG(0,("get_nt_acl_no_snum: talloc() failed!\n"));
4581
conn->params->service = -1;
4583
set_conn_connectpath(conn, "/");
4585
if (!smbd_vfs_init(conn)) {
4586
DEBUG(0,("get_nt_acl_no_snum: Unable to create a fake connection struct!\n"));
4587
conn_free_internal( conn );
4591
ZERO_STRUCT( finfo );
4598
finfo.fsp_name = CONST_DISCARD(char *,fname);
4600
if (!NT_STATUS_IS_OK(SMB_VFS_FGET_NT_ACL( &finfo, DACL_SECURITY_INFORMATION, &psd))) {
4601
DEBUG(0,("get_nt_acl_no_snum: get_nt_acl returned zero.\n"));
4602
conn_free_internal( conn );
4606
ret_sd = dup_sec_desc( ctx, psd );
4608
conn_free_internal( conn );
added
removed
source3/smbd/posix_acls.c
