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s3: Add an async smbsock_connect
[Samba.git] / source3 / modules / vfs_acl_tdb.c
bloba77f6d60f40a0b4f5a5bad63266a5352956d32a9
1 /*
2 * Store Windows ACLs in a tdb.
3 *
4 * Copyright (C) Volker Lendecke, 2008
5 * Copyright (C) Jeremy Allison, 2008
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 3 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, see <http://www.gnu.org/licenses/>.
19 */
20
21 /* NOTE: This is an experimental module, not yet finished. JRA. */
22
23 #include "includes.h"
24 #include "librpc/gen_ndr/xattr.h"
25 #include "librpc/gen_ndr/ndr_xattr.h"
26
27 #undef DBGC_CLASS
28 #define DBGC_CLASS DBGC_VFS
29
30 static unsigned int ref_count;
31 static struct db_context *acl_db;
32
33 /*******************************************************************
34 Open acl_db if not already open, increment ref count.
35 *******************************************************************/
36
37 static bool acl_tdb_init(struct db_context **pp_db)
38 {
39 char *dbname;
40
41 if (acl_db) {
42 *pp_db = acl_db;
43 ref_count++;
44 return true;
45 }
46
47 dbname = state_path("file_ntacls.tdb");
48
49 if (dbname == NULL) {
50 errno = ENOSYS;
51 return false;
52 }
53
54 become_root();
55 *pp_db = db_open(NULL, dbname, 0, TDB_DEFAULT, O_RDWR|O_CREAT, 0600);
56 unbecome_root();
57
58 if (*pp_db == NULL) {
59 #if defined(ENOTSUP)
60 errno = ENOTSUP;
61 #else
62 errno = ENOSYS;
63 #endif
64 TALLOC_FREE(dbname);
65 return false;
66 }
67
68 ref_count++;
69 TALLOC_FREE(dbname);
70 return true;
71 }
72
73 /*******************************************************************
74 Lower ref count and close acl_db if zero.
75 *******************************************************************/
76
77 static void free_acl_tdb_data(void **pptr)
78 {
79 struct db_context **pp_db = (struct db_context **)pptr;
80
81 ref_count--;
82 if (ref_count == 0) {
83 TALLOC_FREE(*pp_db);
84 acl_db = NULL;
85 }
86 }
87
88 /*******************************************************************
89 Fetch_lock the tdb acl record for a file
90 *******************************************************************/
91
92 static struct db_record *acl_tdb_lock(TALLOC_CTX *mem_ctx,
93 struct db_context *db,
94 const struct file_id *id)
95 {
96 uint8 id_buf[16];
97
98 /* For backwards compatibility only store the dev/inode. */
99 push_file_id_16((char *)id_buf, id);
100 return db->fetch_locked(db,
101 mem_ctx,
102 make_tdb_data(id_buf,
103 sizeof(id_buf)));
104 }
105
106 /*******************************************************************
107 Delete the tdb acl record for a file
108 *******************************************************************/
109
110 static NTSTATUS acl_tdb_delete(vfs_handle_struct *handle,
111 struct db_context *db,
112 SMB_STRUCT_STAT *psbuf)
113 {
114 NTSTATUS status;
115 struct file_id id = vfs_file_id_from_sbuf(handle->conn, psbuf);
116 struct db_record *rec = acl_tdb_lock(talloc_tos(), db, &id);
117
118 /*
119 * If rec == NULL there's not much we can do about it
120 */
121
122 if (rec == NULL) {
123 DEBUG(10,("acl_tdb_delete: rec == NULL\n"));
124 TALLOC_FREE(rec);
125 return NT_STATUS_OK;
126 }
127
128 status = rec->delete_rec(rec);
129 TALLOC_FREE(rec);
130 return status;
131 }
132
133 /*******************************************************************
134 Parse out a struct security_descriptor from a DATA_BLOB.
135 *******************************************************************/
136
137 static NTSTATUS parse_acl_blob(const DATA_BLOB *pblob,
138 uint32 security_info,
139 struct security_descriptor **ppdesc)
140 {
141 TALLOC_CTX *ctx = talloc_tos();
142 struct xattr_NTACL xacl;
143 enum ndr_err_code ndr_err;
144 size_t sd_size;
145
146 ndr_err = ndr_pull_struct_blob(pblob, ctx, NULL, &xacl,
147 (ndr_pull_flags_fn_t)ndr_pull_xattr_NTACL);
148
149 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
150 DEBUG(5, ("parse_acl_blob: ndr_pull_xattr_NTACL failed: %s\n",
151 ndr_errstr(ndr_err)));
152 return ndr_map_error2ntstatus(ndr_err);;
153 }
154
155 if (xacl.version != 2) {
156 return NT_STATUS_REVISION_MISMATCH;
157 }
158
159 *ppdesc = make_sec_desc(ctx, SEC_DESC_REVISION, xacl.info.sd_hs->sd->type | SEC_DESC_SELF_RELATIVE,
160 (security_info & OWNER_SECURITY_INFORMATION)
161 ? xacl.info.sd_hs->sd->owner_sid : NULL,
162 (security_info & GROUP_SECURITY_INFORMATION)
163 ? xacl.info.sd_hs->sd->group_sid : NULL,
164 (security_info & SACL_SECURITY_INFORMATION)
165 ? xacl.info.sd_hs->sd->sacl : NULL,
166 (security_info & DACL_SECURITY_INFORMATION)
167 ? xacl.info.sd_hs->sd->dacl : NULL,
168 &sd_size);
169
170 TALLOC_FREE(xacl.info.sd);
171
172 return (*ppdesc != NULL) ? NT_STATUS_OK : NT_STATUS_NO_MEMORY;
173 }
174
175 /*******************************************************************
176 Pull a security descriptor into a DATA_BLOB from a tdb store.
177 *******************************************************************/
178
179 static NTSTATUS get_acl_blob(TALLOC_CTX *ctx,
180 vfs_handle_struct *handle,
181 files_struct *fsp,
182 const char *name,
183 DATA_BLOB *pblob)
184 {
185 uint8 id_buf[16];
186 TDB_DATA data;
187 struct file_id id;
188 struct db_context *db;
189 int ret = -1;
190 SMB_STRUCT_STAT sbuf;
191
192 SMB_VFS_HANDLE_GET_DATA(handle, db, struct db_context,
193 return NT_STATUS_INTERNAL_DB_CORRUPTION);
194
195 if (fsp && fsp->fh->fd != -1) {
196 ret = SMB_VFS_FSTAT(fsp, &sbuf);
197 } else {
198 if (fsp && fsp->posix_open) {
199 ret = SMB_VFS_LSTAT(handle->conn, name, &sbuf);
200 } else {
201 ret = SMB_VFS_STAT(handle->conn, name, &sbuf);
202 }
203 }
204
205 if (ret == -1) {
206 return map_nt_error_from_unix(errno);
207 }
208
209 id = vfs_file_id_from_sbuf(handle->conn, &sbuf);
210
211 /* For backwards compatibility only store the dev/inode. */
212 push_file_id_16((char *)id_buf, &id);
213
214 if (db->fetch(db,
215 ctx,
216 make_tdb_data(id_buf, sizeof(id_buf)),
217 &data) == -1) {
218 return NT_STATUS_INTERNAL_DB_CORRUPTION;
219 }
220
221 pblob->data = data.dptr;
222 pblob->length = data.dsize;
223
224 DEBUG(10,("get_acl_blob: returned %u bytes from file %s\n",
225 (unsigned int)data.dsize, name ));
226
227 if (pblob->length == 0 || pblob->data == NULL) {
228 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
229 }
230 return NT_STATUS_OK;
231 }
232
233 /*******************************************************************
234 Create a DATA_BLOB from a security descriptor.
235 *******************************************************************/
236
237 static NTSTATUS create_acl_blob(const struct security_descriptor *psd, DATA_BLOB *pblob)
238 {
239 struct xattr_NTACL xacl;
240 struct security_descriptor_hash sd_hs;
241 enum ndr_err_code ndr_err;
242 TALLOC_CTX *ctx = talloc_tos();
243
244 ZERO_STRUCT(xacl);
245 ZERO_STRUCT(sd_hs);
246
247 xacl.version = 2;
248 xacl.info.sd_hs = &sd_hs;
249 xacl.info.sd_hs->sd = CONST_DISCARD(struct security_descriptor *, psd);
250 memset(&xacl.info.sd_hs->hash[0], '\0', 16);
251
252 ndr_err = ndr_push_struct_blob(
253 pblob, ctx, NULL, &xacl,
254 (ndr_push_flags_fn_t)ndr_push_xattr_NTACL);
255
256 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
257 DEBUG(5, ("create_acl_blob: ndr_push_xattr_NTACL failed: %s\n",
258 ndr_errstr(ndr_err)));
259 return ndr_map_error2ntstatus(ndr_err);;
260 }
261
262 return NT_STATUS_OK;
263 }
264
265 /*******************************************************************
266 Store a DATA_BLOB into a tdb record given an fsp pointer.
267 *******************************************************************/
268
269 static NTSTATUS store_acl_blob_fsp(vfs_handle_struct *handle,
270 files_struct *fsp,
271 DATA_BLOB *pblob)
272 {
273 uint8 id_buf[16];
274 struct file_id id;
275 SMB_STRUCT_STAT sbuf;
276 TDB_DATA data;
277 struct db_context *db;
278 struct db_record *rec;
279 int ret = -1;
280
281 DEBUG(10,("store_acl_blob_fsp: storing blob length %u on file %s\n",
282 (unsigned int)pblob->length, fsp->fsp_name));
283
284 SMB_VFS_HANDLE_GET_DATA(handle, db, struct db_context,
285 return NT_STATUS_INTERNAL_DB_CORRUPTION);
286
287 if (fsp->fh->fd != -1) {
288 ret = SMB_VFS_FSTAT(fsp, &sbuf);
289 } else {
290 if (fsp->posix_open) {
291 ret = SMB_VFS_LSTAT(handle->conn, fsp->fsp_name, &sbuf);
292 } else {
293 ret = SMB_VFS_STAT(handle->conn, fsp->fsp_name, &sbuf);
294 }
295 }
296
297 if (ret == -1) {
298 return map_nt_error_from_unix(errno);
299 }
300
301 id = vfs_file_id_from_sbuf(handle->conn, &sbuf);
302
303 /* For backwards compatibility only store the dev/inode. */
304 push_file_id_16((char *)id_buf, &id);
305 rec = db->fetch_locked(db, talloc_tos(),
306 make_tdb_data(id_buf,
307 sizeof(id_buf)));
308 if (rec == NULL) {
309 DEBUG(0, ("store_acl_blob_fsp_tdb: fetch_lock failed\n"));
310 return NT_STATUS_INTERNAL_DB_CORRUPTION;
311 }
312 data.dptr = pblob->data;
313 data.dsize = pblob->length;
314 return rec->store(rec, data, 0);
315 }
316
317 /*******************************************************************
318 Store a DATA_BLOB into a tdb record given a pathname.
319 *******************************************************************/
320
321 static NTSTATUS store_acl_blob_pathname(vfs_handle_struct *handle,
322 const char *fname,
323 DATA_BLOB *pblob)
324 {
325 uint8 id_buf[16];
326 struct file_id id;
327 TDB_DATA data;
328 SMB_STRUCT_STAT sbuf;
329 struct db_context *db;
330 struct db_record *rec;
331 int ret = -1;
332
333 DEBUG(10,("store_acl_blob_pathname: storing blob "
334 "length %u on file %s\n",
335 (unsigned int)pblob->length, fname));
336
337 SMB_VFS_HANDLE_GET_DATA(handle, db, struct db_context,
338 return NT_STATUS_INTERNAL_DB_CORRUPTION);
339
340 if (lp_posix_pathnames()) {
341 ret = SMB_VFS_LSTAT(handle->conn, fname, &sbuf);
342 } else {
343 ret = SMB_VFS_STAT(handle->conn, fname, &sbuf);
344 }
345
346 if (ret == -1) {
347 return map_nt_error_from_unix(errno);
348 }
349
350 id = vfs_file_id_from_sbuf(handle->conn, &sbuf);
351
352 /* For backwards compatibility only store the dev/inode. */
353 push_file_id_16((char *)id_buf, &id);
354
355 rec = db->fetch_locked(db, talloc_tos(),
356 make_tdb_data(id_buf,
357 sizeof(id_buf)));
358 if (rec == NULL) {
359 DEBUG(0, ("store_acl_blob_pathname_tdb: fetch_lock failed\n"));
360 return NT_STATUS_INTERNAL_DB_CORRUPTION;
361 }
362 data.dptr = pblob->data;
363 data.dsize = pblob->length;
364 return rec->store(rec, data, 0);
365 }
366
367 /*******************************************************************
368 Store a DATA_BLOB into an tdb given a pathname.
369 *******************************************************************/
370
371 static NTSTATUS get_nt_acl_tdb_internal(vfs_handle_struct *handle,
372 files_struct *fsp,
373 const char *name,
374 uint32 security_info,
375 struct security_descriptor **ppdesc)
376 {
377 TALLOC_CTX *ctx = talloc_tos();
378 DATA_BLOB blob;
379 NTSTATUS status;
380
381 if (fsp && name == NULL) {
382 name = fsp->fsp_name;
383 }
384
385 DEBUG(10, ("get_nt_acl_tdb_internal: name=%s\n", name));
386
387 status = get_acl_blob(ctx, handle, fsp, name, &blob);
388 if (!NT_STATUS_IS_OK(status)) {
389 DEBUG(10, ("get_acl_blob returned %s\n", nt_errstr(status)));
390 return status;
391 }
392
393 status = parse_acl_blob(&blob, security_info, ppdesc);
394 if (!NT_STATUS_IS_OK(status)) {
395 DEBUG(10, ("parse_acl_blob returned %s\n",
396 nt_errstr(status)));
397 return status;
398 }
399
400 TALLOC_FREE(blob.data);
401 return status;
402 }
403
404 /*********************************************************************
405 Create a default security descriptor for a file in case no inheritance
406 exists. All permissions to the owner and SYSTEM.
407 *********************************************************************/
408
409 static struct security_descriptor *default_file_sd(TALLOC_CTX *mem_ctx,
410 SMB_STRUCT_STAT *psbuf)
411 {
412 struct dom_sid owner_sid, group_sid;
413 size_t sd_size;
414 struct security_ace *pace = NULL;
415 struct security_acl *pacl = NULL;
416
417 uid_to_sid(&owner_sid, psbuf->st_uid);
418 gid_to_sid(&group_sid, psbuf->st_gid);
419
420 pace = TALLOC_ARRAY(mem_ctx, struct security_ace, 2);
421 if (!pace) {
422 return NULL;
423 }
424
425 init_sec_ace(&pace[0], &owner_sid, SEC_ACE_TYPE_ACCESS_ALLOWED,
426 SEC_RIGHTS_FILE_ALL, 0);
427 init_sec_ace(&pace[1], &global_sid_System, SEC_ACE_TYPE_ACCESS_ALLOWED,
428 SEC_RIGHTS_FILE_ALL, 0);
429
430 pacl = make_sec_acl(mem_ctx,
431 NT4_ACL_REVISION,
432 2,
433 pace);
434 if (!pacl) {
435 return NULL;
436 }
437 return make_sec_desc(mem_ctx,
438 SECURITY_DESCRIPTOR_REVISION_1,
439 SEC_DESC_SELF_RELATIVE|SEC_DESC_DACL_PRESENT,
440 &owner_sid,
441 &group_sid,
442 NULL,
443 pacl,
444 &sd_size);
445 }
446
447 /*********************************************************************
448 *********************************************************************/
449
450 static NTSTATUS inherit_new_acl(vfs_handle_struct *handle,
451 const char *fname,
452 files_struct *fsp,
453 bool container)
454 {
455 TALLOC_CTX *ctx = talloc_tos();
456 NTSTATUS status;
457 struct security_descriptor *parent_desc = NULL;
458 struct security_descriptor *psd = NULL;
459 DATA_BLOB blob;
460 size_t size;
461 char *parent_name;
462
463 if (!parent_dirname(ctx, fname, &parent_name, NULL)) {
464 return NT_STATUS_NO_MEMORY;
465 }
466
467 DEBUG(10,("inherit_new_acl: check directory %s\n",
468 parent_name));
469
470 status = get_nt_acl_tdb_internal(handle,
471 NULL,
472 parent_name,
473 (OWNER_SECURITY_INFORMATION |
474 GROUP_SECURITY_INFORMATION |
475 DACL_SECURITY_INFORMATION),
476 &parent_desc);
477 if (NT_STATUS_IS_OK(status)) {
478 /* Create an inherited descriptor from the parent. */
479
480 if (DEBUGLEVEL >= 10) {
481 DEBUG(10,("inherit_new_acl: parent acl is:\n"));
482 NDR_PRINT_DEBUG(security_descriptor, parent_desc);
483 }
484
485 status = se_create_child_secdesc(ctx,
486 &psd,
487 &size,
488 parent_desc,
489 &handle->conn->server_info->ptok->user_sids[PRIMARY_USER_SID_INDEX],
490 &handle->conn->server_info->ptok->user_sids[PRIMARY_GROUP_SID_INDEX],
491 container);
492 if (!NT_STATUS_IS_OK(status)) {
493 return status;
494 }
495
496 if (DEBUGLEVEL >= 10) {
497 DEBUG(10,("inherit_new_acl: child acl is:\n"));
498 NDR_PRINT_DEBUG(security_descriptor, psd);
499 }
500
501 } else {
502 DEBUG(10,("inherit_new_acl: directory %s failed "
503 "to get acl %s\n",
504 parent_name,
505 nt_errstr(status) ));
506 }
507
508 if (!psd || psd->dacl == NULL) {
509 SMB_STRUCT_STAT sbuf;
510 int ret;
511
512 TALLOC_FREE(psd);
513 if (fsp && !fsp->is_directory && fsp->fh->fd != -1) {
514 ret = SMB_VFS_FSTAT(fsp, &sbuf);
515 } else {
516 if (fsp && fsp->posix_open) {
517 ret = SMB_VFS_LSTAT(handle->conn,fname, &sbuf);
518 } else {
519 ret = SMB_VFS_STAT(handle->conn,fname, &sbuf);
520 }
521 }
522 if (ret == -1) {
523 return map_nt_error_from_unix(errno);
524 }
525 psd = default_file_sd(ctx, &sbuf);
526 if (!psd) {
527 return NT_STATUS_NO_MEMORY;
528 }
529
530 if (DEBUGLEVEL >= 10) {
531 DEBUG(10,("inherit_new_acl: default acl is:\n"));
532 NDR_PRINT_DEBUG(security_descriptor, psd);
533 }
534 }
535
536 status = create_acl_blob(psd, &blob);
537 if (!NT_STATUS_IS_OK(status)) {
538 return status;
539 }
540 if (fsp) {
541 return store_acl_blob_fsp(handle, fsp, &blob);
542 } else {
543 return store_acl_blob_pathname(handle, fname, &blob);
544 }
545 }
546
547 /*********************************************************************
548 Check ACL on open. For new files inherit from parent directory.
549 *********************************************************************/
550
551 static int open_acl_tdb(vfs_handle_struct *handle,
552 const char *fname,
553 files_struct *fsp,
554 int flags,
555 mode_t mode)
556 {
557 uint32_t access_granted = 0;
558 struct security_descriptor *pdesc = NULL;
559 bool file_existed = true;
560 NTSTATUS status = get_nt_acl_tdb_internal(handle,
561 NULL,
562 fname,
563 (OWNER_SECURITY_INFORMATION |
564 GROUP_SECURITY_INFORMATION |
565 DACL_SECURITY_INFORMATION),
566 &pdesc);
567 if (NT_STATUS_IS_OK(status)) {
568 /* See if we can access it. */
569 status = smb1_file_se_access_check(pdesc,
570 handle->conn->server_info->ptok,
571 fsp->access_mask,
572 &access_granted);
573 if (!NT_STATUS_IS_OK(status)) {
574 DEBUG(10,("open_acl_tdb: file %s open "
575 "refused with error %s\n",
576 fname,
577 nt_errstr(status) ));
578 errno = map_errno_from_nt_status(status);
579 return -1;
580 }
581 } else if (NT_STATUS_EQUAL(status,NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
582 file_existed = false;
583 }
584
585 DEBUG(10,("open_acl_tdb: get_nt_acl_attr_internal for "
586 "file %s returned %s\n",
587 fname,
588 nt_errstr(status) ));
589
590 fsp->fh->fd = SMB_VFS_NEXT_OPEN(handle, fname, fsp, flags, mode);
591
592 if (!file_existed && fsp->fh->fd != -1) {
593 /* File was created. Inherit from parent directory. */
594 string_set(&fsp->fsp_name, fname);
595 inherit_new_acl(handle, fname, fsp, false);
596 }
597
598 return fsp->fh->fd;
599 }
600
601 /*********************************************************************
602 On unlink we need to delete the tdb record (if using tdb).
603 *********************************************************************/
604
605 static int unlink_acl_tdb(vfs_handle_struct *handle, const char *path)
606 {
607 SMB_STRUCT_STAT sbuf;
608 struct db_context *db;
609 int ret = -1;
610
611 SMB_VFS_HANDLE_GET_DATA(handle, db, struct db_context, return -1);
612
613 if (lp_posix_pathnames()) {
614 ret = SMB_VFS_LSTAT(handle->conn, path, &sbuf);
615 } else {
616 ret = SMB_VFS_STAT(handle->conn, path, &sbuf);
617 }
618
619 if (ret == -1) {
620 return -1;
621 }
622
623 ret = SMB_VFS_NEXT_UNLINK(handle, path);
624
625 if (ret == -1) {
626 return -1;
627 }
628
629 acl_tdb_delete(handle, db, &sbuf);
630 return 0;
631 }
632
633 /*********************************************************************
634 Store an inherited SD on mkdir.
635 *********************************************************************/
636
637 static int mkdir_acl_tdb(vfs_handle_struct *handle, const char *path, mode_t mode)
638 {
639 int ret = SMB_VFS_NEXT_MKDIR(handle, path, mode);
640
641 if (ret == -1) {
642 return ret;
643 }
644 /* New directory - inherit from parent. */
645 inherit_new_acl(handle, path, NULL, true);
646 return ret;
647 }
648
649 /*********************************************************************
650 On rmdir we need to delete the tdb record (if using tdb).
651 *********************************************************************/
652
653 static int rmdir_acl_tdb(vfs_handle_struct *handle, const char *path)
654 {
655
656 SMB_STRUCT_STAT sbuf;
657 struct db_context *db;
658 int ret = -1;
659
660 SMB_VFS_HANDLE_GET_DATA(handle, db, struct db_context, return -1);
661
662 if (lp_posix_pathnames()) {
663 ret = SMB_VFS_LSTAT(handle->conn, path, &sbuf);
664 } else {
665 ret = SMB_VFS_STAT(handle->conn, path, &sbuf);
666 }
667
668 if (ret == -1) {
669 return -1;
670 }
671
672 ret = SMB_VFS_NEXT_RMDIR(handle, path);
673 if (ret == -1) {
674 return -1;
675 }
676
677 acl_tdb_delete(handle, db, &sbuf);
678 return 0;
679 }
680
681 /*********************************************************************
682 Fetch a security descriptor given an fsp.
683 *********************************************************************/
684
685 static NTSTATUS fget_nt_acl_tdb(vfs_handle_struct *handle, files_struct *fsp,
686 uint32 security_info, struct security_descriptor **ppdesc)
687 {
688 NTSTATUS status = get_nt_acl_tdb_internal(handle, fsp,
689 NULL, security_info, ppdesc);
690 if (NT_STATUS_IS_OK(status)) {
691 if (DEBUGLEVEL >= 10) {
692 DEBUG(10,("fget_nt_acl_tdb: returning tdb sd for file %s\n",
693 fsp->fsp_name));
694 NDR_PRINT_DEBUG(security_descriptor, *ppdesc);
695 }
696 return NT_STATUS_OK;
697 }
698
699 DEBUG(10,("fget_nt_acl_tdb: failed to get tdb sd for file %s, Error %s\n",
700 fsp->fsp_name,
701 nt_errstr(status) ));
702
703 return SMB_VFS_NEXT_FGET_NT_ACL(handle, fsp,
704 security_info, ppdesc);
705 }
706
707 /*********************************************************************
708 Fetch a security descriptor given a pathname.
709 *********************************************************************/
710
711 static NTSTATUS get_nt_acl_tdb(vfs_handle_struct *handle,
712 const char *name, uint32 security_info, struct security_descriptor **ppdesc)
713 {
714 NTSTATUS status = get_nt_acl_tdb_internal(handle, NULL,
715 name, security_info, ppdesc);
716 if (NT_STATUS_IS_OK(status)) {
717 if (DEBUGLEVEL >= 10) {
718 DEBUG(10,("get_nt_acl_tdb: returning tdb sd for file %s\n",
719 name));
720 NDR_PRINT_DEBUG(security_descriptor, *ppdesc);
721 }
722 return NT_STATUS_OK;
723 }
724
725 DEBUG(10,("get_nt_acl_tdb: failed to get tdb sd for file %s, Error %s\n",
726 name,
727 nt_errstr(status) ));
728
729 return SMB_VFS_NEXT_GET_NT_ACL(handle, name,
730 security_info, ppdesc);
731 }
732
733 /*********************************************************************
734 Store a security descriptor given an fsp.
735 *********************************************************************/
736
737 static NTSTATUS fset_nt_acl_tdb(vfs_handle_struct *handle, files_struct *fsp,
738 uint32 security_info_sent, const struct security_descriptor *psd)
739 {
740 NTSTATUS status;
741 DATA_BLOB blob;
742
743 if (DEBUGLEVEL >= 10) {
744 DEBUG(10,("fset_nt_acl_tdb: incoming sd for file %s\n",
745 fsp->fsp_name));
746 NDR_PRINT_DEBUG(security_descriptor,
747 CONST_DISCARD(struct security_descriptor *,psd));
748 }
749
750 status = SMB_VFS_NEXT_FSET_NT_ACL(handle, fsp, security_info_sent, psd);
751 if (!NT_STATUS_IS_OK(status)) {
752 return status;
753 }
754
755 /* Ensure owner and group are set. */
756 if (!psd->owner_sid || !psd->group_sid) {
757 int ret;
758 SMB_STRUCT_STAT sbuf;
759 DOM_SID owner_sid, group_sid;
760 struct security_descriptor *nc_psd = dup_sec_desc(talloc_tos(), psd);
761
762 if (!nc_psd) {
763 return NT_STATUS_OK;
764 }
765 if (fsp->is_directory || fsp->fh->fd == -1) {
766 if (fsp->posix_open) {
767 ret = SMB_VFS_LSTAT(fsp->conn,fsp->fsp_name, &sbuf);
768 } else {
769 ret = SMB_VFS_STAT(fsp->conn,fsp->fsp_name, &sbuf);
770 }
771 } else {
772 ret = SMB_VFS_FSTAT(fsp, &sbuf);
773 }
774 if (ret == -1) {
775 /* Lower level acl set succeeded,
776 * so still return OK. */
777 return NT_STATUS_OK;
778 }
779 create_file_sids(&sbuf, &owner_sid, &group_sid);
780 /* This is safe as nc_psd is discarded at fn exit. */
781 nc_psd->owner_sid = &owner_sid;
782 nc_psd->group_sid = &group_sid;
783 security_info_sent |= (OWNER_SECURITY_INFORMATION|GROUP_SECURITY_INFORMATION);
784 psd = nc_psd;
785 }
786
787 #if 0
788 if ((security_info_sent & DACL_SECURITY_INFORMATION) &&
789 psd->dacl != NULL &&
790 (psd->type & (SE_DESC_DACL_AUTO_INHERITED|
791 SE_DESC_DACL_AUTO_INHERIT_REQ))==
792 (SE_DESC_DACL_AUTO_INHERITED|
793 SE_DESC_DACL_AUTO_INHERIT_REQ) ) {
794 struct security_descriptor *new_psd = NULL;
795 status = append_parent_acl(fsp, psd, &new_psd);
796 if (!NT_STATUS_IS_OK(status)) {
797 /* Lower level acl set succeeded,
798 * so still return OK. */
799 return NT_STATUS_OK;
800 }
801 psd = new_psd;
802 }
803 #endif
804
805 if (DEBUGLEVEL >= 10) {
806 DEBUG(10,("fset_nt_acl_tdb: storing tdb sd for file %s\n",
807 fsp->fsp_name));
808 NDR_PRINT_DEBUG(security_descriptor,
809 CONST_DISCARD(struct security_descriptor *,psd));
810 }
811 create_acl_blob(psd, &blob);
812 store_acl_blob_fsp(handle, fsp, &blob);
813
814 return NT_STATUS_OK;
815 }
816
817 /*******************************************************************
818 Handle opening the storage tdb if so configured.
819 *******************************************************************/
820
821 static int connect_acl_tdb(struct vfs_handle_struct *handle,
822 const char *service,
823 const char *user)
824 {
825 struct db_context *db;
826 int res;
827
828 res = SMB_VFS_NEXT_CONNECT(handle, service, user);
829 if (res < 0) {
830 return res;
831 }
832
833 if (!acl_tdb_init(&db)) {
834 SMB_VFS_NEXT_DISCONNECT(handle);
835 return -1;
836 }
837
838 SMB_VFS_HANDLE_SET_DATA(handle, db, free_acl_tdb_data,
839 struct db_context, return -1);
840
841 return 0;
842 }
843
844 /*********************************************************************
845 Remove a Windows ACL - we're setting the underlying POSIX ACL.
846 *********************************************************************/
847
848 static int sys_acl_set_file_tdb(vfs_handle_struct *handle,
849 const char *path,
850 SMB_ACL_TYPE_T type,
851 SMB_ACL_T theacl)
852 {
853 SMB_STRUCT_STAT sbuf;
854 struct db_context *db;
855 int ret = -1;
856
857 SMB_VFS_HANDLE_GET_DATA(handle, db, struct db_context, return -1);
858
859 if (lp_posix_pathnames()) {
860 ret = SMB_VFS_LSTAT(handle->conn, path, &sbuf);
861 } else {
862 ret = SMB_VFS_STAT(handle->conn, path, &sbuf);
863 }
864
865 if (ret == -1) {
866 return -1;
867 }
868
869 ret = SMB_VFS_NEXT_SYS_ACL_SET_FILE(handle,
870 path,
871 type,
872 theacl);
873 if (ret == -1) {
874 return -1;
875 }
876
877 acl_tdb_delete(handle, db, &sbuf);
878 return 0;
879 }
880
881 /*********************************************************************
882 Remove a Windows ACL - we're setting the underlying POSIX ACL.
883 *********************************************************************/
884
885 static int sys_acl_set_fd_tdb(vfs_handle_struct *handle,
886 files_struct *fsp,
887 SMB_ACL_T theacl)
888 {
889 SMB_STRUCT_STAT sbuf;
890 struct db_context *db;
891 int ret;
892
893 SMB_VFS_HANDLE_GET_DATA(handle, db, struct db_context, return -1);
894
895 if (fsp->is_directory || fsp->fh->fd == -1) {
896 if (fsp->posix_open) {
897 ret = SMB_VFS_LSTAT(fsp->conn,fsp->fsp_name, &sbuf);
898 } else {
899 ret = SMB_VFS_STAT(fsp->conn,fsp->fsp_name, &sbuf);
900 }
901 } else {
902 ret = SMB_VFS_FSTAT(fsp, &sbuf);
903 }
904 if (ret == -1) {
905 return -1;
906 }
907
908 ret = SMB_VFS_NEXT_SYS_ACL_SET_FD(handle,
909 fsp,
910 theacl);
911 if (ret == -1) {
912 return -1;
913 }
914
915 acl_tdb_delete(handle, db, &sbuf);
916 return 0;
917 }
918
919 /* VFS operations structure */
920
921 static vfs_op_tuple skel_op_tuples[] =
922 {
923 {SMB_VFS_OP(connect_acl_tdb), SMB_VFS_OP_CONNECT, SMB_VFS_LAYER_TRANSPARENT},
924
925 {SMB_VFS_OP(mkdir_acl_tdb), SMB_VFS_OP_MKDIR, SMB_VFS_LAYER_TRANSPARENT},
926 {SMB_VFS_OP(rmdir_acl_tdb), SMB_VFS_OP_RMDIR, SMB_VFS_LAYER_TRANSPARENT},
927
928 {SMB_VFS_OP(open_acl_tdb), SMB_VFS_OP_OPEN, SMB_VFS_LAYER_TRANSPARENT},
929 {SMB_VFS_OP(unlink_acl_tdb), SMB_VFS_OP_UNLINK, SMB_VFS_LAYER_TRANSPARENT},
930
931 /* NT File ACL operations */
932
933 {SMB_VFS_OP(fget_nt_acl_tdb),SMB_VFS_OP_FGET_NT_ACL,SMB_VFS_LAYER_TRANSPARENT},
934 {SMB_VFS_OP(get_nt_acl_tdb), SMB_VFS_OP_GET_NT_ACL, SMB_VFS_LAYER_TRANSPARENT},
935 {SMB_VFS_OP(fset_nt_acl_tdb),SMB_VFS_OP_FSET_NT_ACL,SMB_VFS_LAYER_TRANSPARENT},
936
937 /* POSIX ACL operations. */
938 {SMB_VFS_OP(sys_acl_set_file_tdb), SMB_VFS_OP_SYS_ACL_SET_FILE, SMB_VFS_LAYER_TRANSPARENT},
939 {SMB_VFS_OP(sys_acl_set_fd_tdb), SMB_VFS_OP_SYS_ACL_SET_FD, SMB_VFS_LAYER_TRANSPARENT},
940
941 {SMB_VFS_OP(NULL), SMB_VFS_OP_NOOP, SMB_VFS_LAYER_NOOP}
942 };
943
944 NTSTATUS vfs_acl_tdb_init(void)
945 {
946 return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "acl_tdb", skel_op_tuples);
947 }
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