Line data Source code
1 : /*
2 : * Store Windows ACLs in data store - common functions.
3 : * #included into modules/vfs_acl_xattr.c and modules/vfs_acl_tdb.c
4 : *
5 : * Copyright (C) Volker Lendecke, 2008
6 : * Copyright (C) Jeremy Allison, 2009
7 : * Copyright (C) Ralph Böhme, 2016
8 : *
9 : * This program is free software; you can redistribute it and/or modify
10 : * it under the terms of the GNU General Public License as published by
11 : * the Free Software Foundation; either version 3 of the License, or
12 : * (at your option) any later version.
13 : *
14 : * This program is distributed in the hope that it will be useful,
15 : * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 : * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 : * GNU General Public License for more details.
18 : *
19 : * You should have received a copy of the GNU General Public License
20 : * along with this program; if not, see <http://www.gnu.org/licenses/>.
21 : */
22 :
23 : #include "includes.h"
24 : #include "vfs_acl_common.h"
25 : #include "smbd/smbd.h"
26 : #include "system/filesys.h"
27 : #include "librpc/gen_ndr/ndr_xattr.h"
28 : #include "../libcli/security/security.h"
29 : #include "../librpc/gen_ndr/ndr_security.h"
30 : #include "../lib/util/bitmap.h"
31 : #include "passdb/lookup_sid.h"
32 :
33 : #include <gnutls/gnutls.h>
34 : #include <gnutls/crypto.h>
35 :
36 : static NTSTATUS create_acl_blob(const struct security_descriptor *psd,
37 : DATA_BLOB *pblob,
38 : uint16_t hash_type,
39 : uint8_t hash[XATTR_SD_HASH_SIZE]);
40 :
41 : #define HASH_SECURITY_INFO (SECINFO_OWNER | \
42 : SECINFO_GROUP | \
43 : SECINFO_DACL | \
44 : SECINFO_SACL)
45 :
46 7952 : bool init_acl_common_config(vfs_handle_struct *handle,
47 : const char *module_name)
48 : {
49 7952 : struct acl_common_config *config = NULL;
50 7952 : const struct enum_list *default_acl_style_list = NULL;
51 :
52 7952 : default_acl_style_list = get_default_acl_style_list();
53 :
54 7952 : config = talloc_zero(handle->conn, struct acl_common_config);
55 7952 : if (config == NULL) {
56 0 : DBG_ERR("talloc_zero() failed\n");
57 0 : errno = ENOMEM;
58 0 : return false;
59 : }
60 :
61 7952 : config->ignore_system_acls = lp_parm_bool(SNUM(handle->conn),
62 : module_name,
63 : "ignore system acls",
64 : false);
65 7952 : config->default_acl_style = lp_parm_enum(SNUM(handle->conn),
66 : module_name,
67 : "default acl style",
68 : default_acl_style_list,
69 : DEFAULT_ACL_POSIX);
70 :
71 7952 : SMB_VFS_HANDLE_SET_DATA(handle, config, NULL,
72 : struct acl_common_config,
73 : return false);
74 :
75 7952 : return true;
76 : }
77 :
78 :
79 : /*******************************************************************
80 : Hash a security descriptor.
81 : *******************************************************************/
82 :
83 10037 : static NTSTATUS hash_blob_sha256(DATA_BLOB blob,
84 : uint8_t *hash)
85 : {
86 : int rc;
87 :
88 10037 : ZERO_ARRAY_LEN(hash, XATTR_SD_HASH_SIZE);
89 :
90 18935 : rc = gnutls_hash_fast(GNUTLS_DIG_SHA256,
91 10037 : blob.data,
92 : blob.length,
93 : hash);
94 10037 : if (rc < 0) {
95 0 : return NT_STATUS_INTERNAL_ERROR;
96 : }
97 :
98 10037 : return NT_STATUS_OK;
99 : }
100 :
101 : /*******************************************************************
102 : Hash a security descriptor.
103 : *******************************************************************/
104 :
105 2382 : static NTSTATUS hash_sd_sha256(struct security_descriptor *psd,
106 : uint8_t *hash)
107 : {
108 : DATA_BLOB blob;
109 : NTSTATUS status;
110 :
111 2382 : memset(hash, '\0', XATTR_SD_HASH_SIZE);
112 2382 : status = create_acl_blob(psd, &blob, XATTR_SD_HASH_TYPE_SHA256, hash);
113 2382 : if (!NT_STATUS_IS_OK(status)) {
114 0 : return status;
115 : }
116 2382 : return hash_blob_sha256(blob, hash);
117 : }
118 :
119 : /*******************************************************************
120 : Parse out a struct security_descriptor from a DATA_BLOB.
121 : *******************************************************************/
122 :
123 5273 : static NTSTATUS parse_acl_blob(const DATA_BLOB *pblob,
124 : TALLOC_CTX *mem_ctx,
125 : struct security_descriptor **ppdesc,
126 : uint16_t *p_hash_type,
127 : uint16_t *p_version,
128 : uint8_t hash[XATTR_SD_HASH_SIZE],
129 : uint8_t sys_acl_hash[XATTR_SD_HASH_SIZE])
130 : {
131 : struct xattr_NTACL xacl;
132 : enum ndr_err_code ndr_err;
133 : size_t sd_size;
134 5273 : TALLOC_CTX *frame = talloc_stackframe();
135 :
136 5273 : ndr_err = ndr_pull_struct_blob(pblob, frame, &xacl,
137 : (ndr_pull_flags_fn_t)ndr_pull_xattr_NTACL);
138 :
139 5273 : if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
140 0 : DBG_INFO("ndr_pull_xattr_NTACL failed: %s\n",
141 : ndr_errstr(ndr_err));
142 0 : TALLOC_FREE(frame);
143 0 : return ndr_map_error2ntstatus(ndr_err);
144 : }
145 :
146 5273 : *p_version = xacl.version;
147 :
148 5273 : switch (xacl.version) {
149 0 : case 1:
150 0 : *ppdesc = make_sec_desc(mem_ctx, SD_REVISION,
151 0 : xacl.info.sd->type | SEC_DESC_SELF_RELATIVE,
152 0 : xacl.info.sd->owner_sid,
153 0 : xacl.info.sd->group_sid,
154 0 : xacl.info.sd->sacl,
155 0 : xacl.info.sd->dacl,
156 : &sd_size);
157 : /* No hash - null out. */
158 0 : *p_hash_type = XATTR_SD_HASH_TYPE_NONE;
159 0 : memset(hash, '\0', XATTR_SD_HASH_SIZE);
160 0 : break;
161 0 : case 2:
162 0 : *ppdesc = make_sec_desc(mem_ctx, SD_REVISION,
163 0 : xacl.info.sd_hs2->sd->type | SEC_DESC_SELF_RELATIVE,
164 0 : xacl.info.sd_hs2->sd->owner_sid,
165 0 : xacl.info.sd_hs2->sd->group_sid,
166 0 : xacl.info.sd_hs2->sd->sacl,
167 0 : xacl.info.sd_hs2->sd->dacl,
168 : &sd_size);
169 : /* No hash - null out. */
170 0 : *p_hash_type = XATTR_SD_HASH_TYPE_NONE;
171 0 : memset(hash, '\0', XATTR_SD_HASH_SIZE);
172 0 : break;
173 0 : case 3:
174 0 : *ppdesc = make_sec_desc(mem_ctx, SD_REVISION,
175 0 : xacl.info.sd_hs3->sd->type | SEC_DESC_SELF_RELATIVE,
176 0 : xacl.info.sd_hs3->sd->owner_sid,
177 0 : xacl.info.sd_hs3->sd->group_sid,
178 0 : xacl.info.sd_hs3->sd->sacl,
179 0 : xacl.info.sd_hs3->sd->dacl,
180 : &sd_size);
181 0 : *p_hash_type = xacl.info.sd_hs3->hash_type;
182 : /* Current version 3 (if no sys acl hash available). */
183 0 : memcpy(hash, xacl.info.sd_hs3->hash, XATTR_SD_HASH_SIZE);
184 0 : break;
185 5273 : case 4:
186 15370 : *ppdesc = make_sec_desc(mem_ctx, SD_REVISION,
187 5273 : xacl.info.sd_hs4->sd->type | SEC_DESC_SELF_RELATIVE,
188 5273 : xacl.info.sd_hs4->sd->owner_sid,
189 5273 : xacl.info.sd_hs4->sd->group_sid,
190 5273 : xacl.info.sd_hs4->sd->sacl,
191 5273 : xacl.info.sd_hs4->sd->dacl,
192 : &sd_size);
193 5273 : *p_hash_type = xacl.info.sd_hs4->hash_type;
194 : /* Current version 4. */
195 5273 : memcpy(hash, xacl.info.sd_hs4->hash, XATTR_SD_HASH_SIZE);
196 5273 : memcpy(sys_acl_hash, xacl.info.sd_hs4->sys_acl_hash, XATTR_SD_HASH_SIZE);
197 5273 : break;
198 0 : default:
199 0 : TALLOC_FREE(frame);
200 0 : return NT_STATUS_REVISION_MISMATCH;
201 : }
202 :
203 5273 : TALLOC_FREE(frame);
204 :
205 5273 : return (*ppdesc != NULL) ? NT_STATUS_OK : NT_STATUS_NO_MEMORY;
206 : }
207 :
208 : /*******************************************************************
209 : Create a DATA_BLOB from a hash of the security descriptor storead at
210 : the system layer and the NT ACL we wish to preserve
211 : *******************************************************************/
212 :
213 2382 : static NTSTATUS create_acl_blob(const struct security_descriptor *psd,
214 : DATA_BLOB *pblob,
215 : uint16_t hash_type,
216 : uint8_t hash[XATTR_SD_HASH_SIZE])
217 : {
218 : struct xattr_NTACL xacl;
219 : struct security_descriptor_hash_v3 sd_hs3;
220 : enum ndr_err_code ndr_err;
221 2382 : TALLOC_CTX *ctx = talloc_tos();
222 :
223 2382 : ZERO_STRUCT(xacl);
224 2382 : ZERO_STRUCT(sd_hs3);
225 :
226 2382 : xacl.version = 3;
227 2382 : xacl.info.sd_hs3 = &sd_hs3;
228 2382 : xacl.info.sd_hs3->sd = discard_const_p(struct security_descriptor, psd);
229 2382 : xacl.info.sd_hs3->hash_type = hash_type;
230 2382 : memcpy(&xacl.info.sd_hs3->hash[0], hash, XATTR_SD_HASH_SIZE);
231 :
232 2382 : ndr_err = ndr_push_struct_blob(
233 : pblob, ctx, &xacl,
234 : (ndr_push_flags_fn_t)ndr_push_xattr_NTACL);
235 :
236 2382 : if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
237 0 : DBG_INFO("ndr_push_xattr_NTACL failed: %s\n",
238 : ndr_errstr(ndr_err));
239 0 : return ndr_map_error2ntstatus(ndr_err);
240 : }
241 :
242 2382 : return NT_STATUS_OK;
243 : }
244 :
245 : /*******************************************************************
246 : Create a DATA_BLOB from a hash of the security descriptors
247 : (system and NT) stored at the system layer and the NT ACL we wish
248 : to preserve.
249 : *******************************************************************/
250 :
251 2382 : static NTSTATUS create_sys_acl_blob(const struct security_descriptor *psd,
252 : DATA_BLOB *pblob,
253 : uint16_t hash_type,
254 : uint8_t hash[XATTR_SD_HASH_SIZE],
255 : const char *description,
256 : uint8_t sys_acl_hash[XATTR_SD_HASH_SIZE])
257 : {
258 : struct xattr_NTACL xacl;
259 : struct security_descriptor_hash_v4 sd_hs4;
260 : enum ndr_err_code ndr_err;
261 2382 : TALLOC_CTX *ctx = talloc_tos();
262 : NTTIME nttime_now;
263 2382 : struct timeval now = timeval_current();
264 2382 : nttime_now = timeval_to_nttime(&now);
265 :
266 2382 : ZERO_STRUCT(xacl);
267 2382 : ZERO_STRUCT(sd_hs4);
268 :
269 2382 : xacl.version = 4;
270 2382 : xacl.info.sd_hs4 = &sd_hs4;
271 2382 : xacl.info.sd_hs4->sd = discard_const_p(struct security_descriptor, psd);
272 2382 : xacl.info.sd_hs4->hash_type = hash_type;
273 2382 : memcpy(&xacl.info.sd_hs4->hash[0], hash, XATTR_SD_HASH_SIZE);
274 2382 : xacl.info.sd_hs4->description = description;
275 2382 : xacl.info.sd_hs4->time = nttime_now;
276 2382 : memcpy(&xacl.info.sd_hs4->sys_acl_hash[0], sys_acl_hash, XATTR_SD_HASH_SIZE);
277 :
278 2382 : ndr_err = ndr_push_struct_blob(
279 : pblob, ctx, &xacl,
280 : (ndr_push_flags_fn_t)ndr_push_xattr_NTACL);
281 :
282 2382 : if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
283 0 : DBG_INFO("ndr_push_xattr_NTACL failed: %s\n",
284 : ndr_errstr(ndr_err));
285 0 : return ndr_map_error2ntstatus(ndr_err);
286 : }
287 :
288 2382 : return NT_STATUS_OK;
289 : }
290 :
291 : /*******************************************************************
292 : Add in 3 inheritable components for a non-inheritable directory ACL.
293 : CREATOR_OWNER/CREATOR_GROUP/WORLD.
294 : *******************************************************************/
295 :
296 3044 : static NTSTATUS add_directory_inheritable_components(vfs_handle_struct *handle,
297 : const char *name,
298 : SMB_STRUCT_STAT *psbuf,
299 : struct security_descriptor *psd)
300 : {
301 3044 : struct connection_struct *conn = handle->conn;
302 3044 : int num_aces = (psd->dacl ? psd->dacl->num_aces : 0);
303 : struct smb_filename smb_fname;
304 : enum security_ace_type acltype;
305 : uint32_t access_mask;
306 : mode_t dir_mode;
307 : mode_t file_mode;
308 : mode_t mode;
309 : struct security_ace *new_ace_list;
310 :
311 3044 : if (psd->dacl) {
312 3044 : new_ace_list = talloc_zero_array(psd->dacl,
313 : struct security_ace,
314 : num_aces + 3);
315 : } else {
316 : /*
317 : * make_sec_acl() at the bottom of this function
318 : * dupliates new_ace_list
319 : */
320 0 : new_ace_list = talloc_zero_array(talloc_tos(),
321 : struct security_ace,
322 : num_aces + 3);
323 : }
324 :
325 3044 : if (new_ace_list == NULL) {
326 0 : return NT_STATUS_NO_MEMORY;
327 : }
328 :
329 : /* Fake a quick smb_filename. */
330 3044 : ZERO_STRUCT(smb_fname);
331 3044 : smb_fname.st = *psbuf;
332 3044 : smb_fname.base_name = discard_const_p(char, name);
333 :
334 3044 : dir_mode = unix_mode(conn,
335 : FILE_ATTRIBUTE_DIRECTORY, &smb_fname, NULL);
336 3044 : file_mode = unix_mode(conn,
337 : FILE_ATTRIBUTE_ARCHIVE, &smb_fname, NULL);
338 :
339 3044 : mode = dir_mode | file_mode;
340 :
341 3044 : DBG_DEBUG("directory %s, mode = 0%o\n", name, (unsigned int)mode);
342 :
343 3044 : if (num_aces) {
344 3044 : memcpy(new_ace_list, psd->dacl->aces,
345 : num_aces * sizeof(struct security_ace));
346 : }
347 3044 : access_mask = map_canon_ace_perms(SNUM(conn), &acltype,
348 : mode & 0700, false);
349 :
350 3044 : init_sec_ace(&new_ace_list[num_aces],
351 : &global_sid_Creator_Owner,
352 : acltype,
353 : access_mask,
354 : SEC_ACE_FLAG_CONTAINER_INHERIT|
355 : SEC_ACE_FLAG_OBJECT_INHERIT|
356 : SEC_ACE_FLAG_INHERIT_ONLY);
357 3044 : access_mask = map_canon_ace_perms(SNUM(conn), &acltype,
358 3044 : (mode << 3) & 0700, false);
359 3044 : init_sec_ace(&new_ace_list[num_aces+1],
360 : &global_sid_Creator_Group,
361 : acltype,
362 : access_mask,
363 : SEC_ACE_FLAG_CONTAINER_INHERIT|
364 : SEC_ACE_FLAG_OBJECT_INHERIT|
365 : SEC_ACE_FLAG_INHERIT_ONLY);
366 3044 : access_mask = map_canon_ace_perms(SNUM(conn), &acltype,
367 3044 : (mode << 6) & 0700, false);
368 3044 : init_sec_ace(&new_ace_list[num_aces+2],
369 : &global_sid_World,
370 : acltype,
371 : access_mask,
372 : SEC_ACE_FLAG_CONTAINER_INHERIT|
373 : SEC_ACE_FLAG_OBJECT_INHERIT|
374 : SEC_ACE_FLAG_INHERIT_ONLY);
375 3044 : if (psd->dacl) {
376 3044 : psd->dacl->aces = new_ace_list;
377 3044 : psd->dacl->num_aces += 3;
378 7272 : psd->dacl->size += new_ace_list[num_aces].size +
379 5158 : new_ace_list[num_aces+1].size +
380 3044 : new_ace_list[num_aces+2].size;
381 : } else {
382 0 : psd->dacl = make_sec_acl(psd,
383 : NT4_ACL_REVISION,
384 : 3,
385 : new_ace_list);
386 0 : if (psd->dacl == NULL) {
387 0 : return NT_STATUS_NO_MEMORY;
388 : }
389 : }
390 3044 : return NT_STATUS_OK;
391 : }
392 :
393 : /**
394 : * Validate an ACL blob
395 : *
396 : * This validates an ACL blob against the underlying filesystem ACL. If this
397 : * function returns NT_STATUS_OK ppsd can be
398 : *
399 : * 1. the ACL from the blob (psd_from_fs=false), or
400 : * 2. the ACL from the fs (psd_from_fs=true), or
401 : * 3. NULL (!)
402 : *
403 : * If the return value is anything else then NT_STATUS_OK, ppsd is set to NULL
404 : * and psd_from_fs set to false.
405 : *
406 : * Returning the underlying filesystem ACL in case no. 2 is really just an
407 : * optimisation, because some validations have to fetch the filesytem ACL as
408 : * part of the validation, so we already have it available and callers might
409 : * need it as well.
410 : **/
411 5273 : static NTSTATUS validate_nt_acl_blob(TALLOC_CTX *mem_ctx,
412 : vfs_handle_struct *handle,
413 : struct files_struct *fsp,
414 : const struct smb_filename *smb_fname,
415 : const DATA_BLOB *blob,
416 : struct security_descriptor **ppsd,
417 : bool *psd_is_from_fs)
418 : {
419 : NTSTATUS status;
420 5273 : uint16_t hash_type = XATTR_SD_HASH_TYPE_NONE;
421 5273 : uint16_t xattr_version = 0;
422 : uint8_t hash[XATTR_SD_HASH_SIZE];
423 : uint8_t sys_acl_hash[XATTR_SD_HASH_SIZE];
424 : uint8_t hash_tmp[XATTR_SD_HASH_SIZE];
425 : uint8_t sys_acl_hash_tmp[XATTR_SD_HASH_SIZE];
426 5273 : struct security_descriptor *psd = NULL;
427 5273 : struct security_descriptor *psd_blob = NULL;
428 5273 : struct security_descriptor *psd_fs = NULL;
429 5273 : char *sys_acl_blob_description = NULL;
430 5273 : DATA_BLOB sys_acl_blob = { 0 };
431 5273 : struct acl_common_config *config = NULL;
432 :
433 5273 : *ppsd = NULL;
434 5273 : *psd_is_from_fs = false;
435 :
436 5273 : SMB_VFS_HANDLE_GET_DATA(handle, config,
437 : struct acl_common_config,
438 : return NT_STATUS_UNSUCCESSFUL);
439 :
440 5273 : status = parse_acl_blob(blob,
441 : mem_ctx,
442 : &psd_blob,
443 : &hash_type,
444 : &xattr_version,
445 : &hash[0],
446 : &sys_acl_hash[0]);
447 5273 : if (!NT_STATUS_IS_OK(status)) {
448 0 : DBG_DEBUG("parse_acl_blob returned %s\n", nt_errstr(status));
449 0 : goto fail;
450 : }
451 :
452 : /* determine which type of xattr we got */
453 5273 : switch (xattr_version) {
454 0 : case 1:
455 : case 2:
456 : /* These xattr types are unilatteral, they do not
457 : * require confirmation of the hash. In particular,
458 : * the NTVFS file server uses version 1, but
459 : * 'samba-tool ntacl' can set these as well */
460 0 : *ppsd = psd_blob;
461 0 : return NT_STATUS_OK;
462 5273 : case 3:
463 : case 4:
464 5273 : if (config->ignore_system_acls) {
465 0 : *ppsd = psd_blob;
466 0 : return NT_STATUS_OK;
467 : }
468 :
469 5273 : break;
470 0 : default:
471 0 : DBG_DEBUG("ACL blob revision mismatch (%u) for file %s\n",
472 : (unsigned int)hash_type, smb_fname->base_name);
473 0 : TALLOC_FREE(psd_blob);
474 0 : return NT_STATUS_OK;
475 : }
476 :
477 : /* determine which type of xattr we got */
478 5273 : if (hash_type != XATTR_SD_HASH_TYPE_SHA256) {
479 0 : DBG_DEBUG("ACL blob hash type (%u) unexpected for file %s\n",
480 : (unsigned int)hash_type, smb_fname->base_name);
481 0 : TALLOC_FREE(psd_blob);
482 0 : return NT_STATUS_OK;
483 : }
484 :
485 : /* determine which type of xattr we got */
486 5273 : switch (xattr_version) {
487 5273 : case 4:
488 : {
489 : int ret;
490 : /* Get the full underlying sd, then hash. */
491 5273 : ret = SMB_VFS_NEXT_SYS_ACL_BLOB_GET_FD(handle,
492 : fsp,
493 : mem_ctx,
494 : &sys_acl_blob_description,
495 : &sys_acl_blob);
496 : /* If we fail to get the ACL blob (for some reason) then this
497 : * is not fatal, we just work based on the NT ACL only */
498 5273 : if (ret == 0) {
499 5273 : status = hash_blob_sha256(sys_acl_blob, sys_acl_hash_tmp);
500 5273 : if (!NT_STATUS_IS_OK(status)) {
501 0 : goto fail;
502 : }
503 :
504 5273 : TALLOC_FREE(sys_acl_blob_description);
505 5273 : TALLOC_FREE(sys_acl_blob.data);
506 :
507 5273 : if (memcmp(&sys_acl_hash[0], &sys_acl_hash_tmp[0],
508 : XATTR_SD_HASH_SIZE) == 0) {
509 : /* Hash matches, return blob sd. */
510 5273 : DBG_DEBUG("blob hash matches for file %s\n",
511 : smb_fname->base_name);
512 5273 : *ppsd = psd_blob;
513 5273 : return NT_STATUS_OK;
514 : }
515 : }
516 :
517 : /* Otherwise, fall though and see if the NT ACL hash matches */
518 : FALL_THROUGH;
519 : }
520 : case 3:
521 : /* Get the full underlying sd for the hash
522 : or to return as backup. */
523 0 : status = SMB_VFS_NEXT_FGET_NT_ACL(handle,
524 : fsp,
525 : HASH_SECURITY_INFO,
526 : mem_ctx,
527 : &psd_fs);
528 0 : if (!NT_STATUS_IS_OK(status)) {
529 0 : DBG_DEBUG("get_next_acl for file %s returned %s\n",
530 : smb_fname->base_name, nt_errstr(status));
531 0 : goto fail;
532 : }
533 :
534 0 : status = hash_sd_sha256(psd_fs, hash_tmp);
535 0 : if (!NT_STATUS_IS_OK(status)) {
536 0 : TALLOC_FREE(psd_blob);
537 0 : *ppsd = psd_fs;
538 0 : *psd_is_from_fs = true;
539 0 : return NT_STATUS_OK;
540 : }
541 :
542 0 : if (memcmp(&hash[0], &hash_tmp[0], XATTR_SD_HASH_SIZE) == 0) {
543 : /* Hash matches, return blob sd. */
544 0 : DBG_DEBUG("blob hash matches for file %s\n",
545 : smb_fname->base_name);
546 0 : *ppsd = psd_blob;
547 0 : return NT_STATUS_OK;
548 : }
549 :
550 : /* Hash doesn't match, return underlying sd. */
551 0 : DBG_DEBUG("blob hash does not match for file %s - returning "
552 : "file system SD mapping.\n",
553 : smb_fname->base_name);
554 :
555 0 : if (DEBUGLEVEL >= 10) {
556 0 : DBG_DEBUG("acl for blob hash for %s is:\n",
557 : smb_fname->base_name);
558 0 : NDR_PRINT_DEBUG(security_descriptor, psd_fs);
559 : }
560 :
561 0 : TALLOC_FREE(psd_blob);
562 0 : *ppsd = psd_fs;
563 0 : *psd_is_from_fs = true;
564 : }
565 :
566 0 : return NT_STATUS_OK;
567 :
568 0 : fail:
569 0 : TALLOC_FREE(psd);
570 0 : TALLOC_FREE(psd_blob);
571 0 : TALLOC_FREE(psd_fs);
572 0 : TALLOC_FREE(sys_acl_blob_description);
573 0 : TALLOC_FREE(sys_acl_blob.data);
574 0 : return status;
575 : }
576 :
577 : /*******************************************************************
578 : Pull a DATA_BLOB from an xattr given an fsp.
579 : If the hash doesn't match, or doesn't exist - return the underlying
580 : filesystem sd.
581 : *******************************************************************/
582 :
583 9043 : NTSTATUS fget_nt_acl_common(
584 : NTSTATUS (*fget_acl_blob_fn)(TALLOC_CTX *ctx,
585 : vfs_handle_struct *handle,
586 : files_struct *fsp,
587 : DATA_BLOB *pblob),
588 : vfs_handle_struct *handle,
589 : files_struct *fsp,
590 : uint32_t security_info,
591 : TALLOC_CTX *mem_ctx,
592 : struct security_descriptor **ppdesc)
593 : {
594 9043 : DATA_BLOB blob = data_blob_null;
595 : NTSTATUS status;
596 9043 : struct security_descriptor *psd = NULL;
597 9043 : const struct smb_filename *smb_fname = fsp->fsp_name;
598 9043 : bool psd_is_from_fs = false;
599 9043 : struct acl_common_config *config = NULL;
600 :
601 9043 : SMB_VFS_HANDLE_GET_DATA(handle, config,
602 : struct acl_common_config,
603 : return NT_STATUS_UNSUCCESSFUL);
604 :
605 9043 : DBG_DEBUG("name=%s\n", smb_fname->base_name);
606 :
607 9043 : status = fget_acl_blob_fn(mem_ctx, handle, fsp, &blob);
608 9043 : if (NT_STATUS_IS_OK(status)) {
609 5273 : status = validate_nt_acl_blob(mem_ctx,
610 : handle,
611 : fsp,
612 : smb_fname,
613 : &blob,
614 : &psd,
615 : &psd_is_from_fs);
616 5273 : TALLOC_FREE(blob.data);
617 5273 : if (!NT_STATUS_IS_OK(status)) {
618 0 : DBG_DEBUG("ACL validation for [%s] failed\n",
619 : smb_fname->base_name);
620 0 : goto fail;
621 : }
622 : }
623 :
624 9043 : if (psd == NULL) {
625 : /* Get the full underlying sd, as we failed to get the
626 : * blob for the hash, or the revision/hash type wasn't
627 : * known */
628 :
629 3770 : if (config->ignore_system_acls) {
630 0 : status = vfs_stat_fsp(fsp);
631 0 : if (!NT_STATUS_IS_OK(status)) {
632 0 : goto fail;
633 : }
634 :
635 0 : status = make_default_filesystem_acl(
636 : mem_ctx,
637 : config->default_acl_style,
638 0 : smb_fname->base_name,
639 0 : &fsp->fsp_name->st,
640 : &psd);
641 0 : if (!NT_STATUS_IS_OK(status)) {
642 0 : goto fail;
643 : }
644 : } else {
645 3770 : status = SMB_VFS_NEXT_FGET_NT_ACL(handle,
646 : fsp,
647 : security_info,
648 : mem_ctx,
649 : &psd);
650 :
651 3770 : if (!NT_STATUS_IS_OK(status)) {
652 0 : DBG_DEBUG("get_next_acl for file %s "
653 : "returned %s\n",
654 : smb_fname->base_name,
655 : nt_errstr(status));
656 0 : goto fail;
657 : }
658 :
659 3770 : psd_is_from_fs = true;
660 : }
661 : }
662 :
663 9043 : if (psd_is_from_fs) {
664 3770 : status = vfs_stat_fsp(fsp);
665 3770 : if (!NT_STATUS_IS_OK(status)) {
666 0 : goto fail;
667 : }
668 :
669 : /*
670 : * We're returning the underlying ACL from the
671 : * filesystem. If it's a directory, and has no
672 : * inheritable ACE entries we have to fake them.
673 : */
674 :
675 5884 : if (fsp->fsp_flags.is_directory &&
676 3044 : !sd_has_inheritable_components(psd, true)) {
677 7272 : status = add_directory_inheritable_components(
678 : handle,
679 3044 : smb_fname->base_name,
680 3044 : &fsp->fsp_name->st,
681 : psd);
682 3044 : if (!NT_STATUS_IS_OK(status)) {
683 0 : goto fail;
684 : }
685 : }
686 :
687 : /*
688 : * The underlying POSIX module always sets the
689 : * ~SEC_DESC_DACL_PROTECTED bit, as ACLs can't be inherited in
690 : * this way under POSIX. Remove it for Windows-style ACLs.
691 : */
692 3770 : psd->type &= ~SEC_DESC_DACL_PROTECTED;
693 : }
694 :
695 9043 : if (!(security_info & SECINFO_OWNER)) {
696 2123 : psd->owner_sid = NULL;
697 : }
698 9043 : if (!(security_info & SECINFO_GROUP)) {
699 2123 : psd->group_sid = NULL;
700 : }
701 9043 : if (!(security_info & SECINFO_DACL)) {
702 0 : psd->type &= ~SEC_DESC_DACL_PRESENT;
703 0 : psd->dacl = NULL;
704 : }
705 9043 : if (!(security_info & SECINFO_SACL)) {
706 6253 : psd->type &= ~SEC_DESC_SACL_PRESENT;
707 6253 : psd->sacl = NULL;
708 : }
709 :
710 9043 : if (DEBUGLEVEL >= 10) {
711 0 : DBG_DEBUG("returning acl for %s is:\n",
712 : smb_fname->base_name);
713 0 : NDR_PRINT_DEBUG(security_descriptor, psd);
714 : }
715 :
716 9043 : *ppdesc = psd;
717 :
718 9043 : return NT_STATUS_OK;
719 :
720 0 : fail:
721 0 : TALLOC_FREE(psd);
722 0 : return status;
723 : }
724 :
725 : /*********************************************************************
726 : Set the underlying ACL (e.g. POSIX ACLS, POSIX owner, etc)
727 : *********************************************************************/
728 2382 : static NTSTATUS set_underlying_acl(vfs_handle_struct *handle, files_struct *fsp,
729 : struct security_descriptor *psd,
730 : uint32_t security_info_sent,
731 : bool chown_needed)
732 : {
733 : NTSTATUS status;
734 2382 : const struct security_token *token = NULL;
735 : struct dom_sid_buf buf;
736 :
737 2382 : status = SMB_VFS_NEXT_FSET_NT_ACL(handle, fsp, security_info_sent, psd);
738 2382 : if (!NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)) {
739 2382 : return status;
740 : }
741 :
742 : /* We got access denied here. If we're already root,
743 : or we didn't need to do a chown, or the fsp isn't
744 : open with WRITE_OWNER access, just return. */
745 0 : if (get_current_uid(handle->conn) == 0 || chown_needed == false ||
746 0 : !(fsp->access_mask & SEC_STD_WRITE_OWNER)) {
747 0 : return NT_STATUS_ACCESS_DENIED;
748 : }
749 :
750 : /*
751 : * Only allow take-ownership, not give-ownership. That's the way Windows
752 : * implements SEC_STD_WRITE_OWNER. MS-FSA 2.1.5.16 just states: If
753 : * InputBuffer.OwnerSid is not a valid owner SID for a file in the
754 : * objectstore, as determined in an implementation specific manner, the
755 : * object store MUST return STATUS_INVALID_OWNER.
756 : */
757 0 : token = get_current_nttok(fsp->conn);
758 0 : if (!security_token_is_sid(token, psd->owner_sid)) {
759 0 : return NT_STATUS_INVALID_OWNER;
760 : }
761 :
762 0 : DBG_DEBUG("overriding chown on file %s for sid %s\n",
763 : fsp_str_dbg(fsp),
764 : dom_sid_str_buf(psd->owner_sid, &buf));
765 :
766 : /* Ok, we failed to chown and we have
767 : SEC_STD_WRITE_OWNER access - override. */
768 0 : become_root();
769 0 : status = SMB_VFS_NEXT_FSET_NT_ACL(handle, fsp, security_info_sent, psd);
770 0 : unbecome_root();
771 :
772 0 : return status;
773 : }
774 :
775 : /*********************************************************************
776 : Store a v3 security descriptor
777 : *********************************************************************/
778 0 : static NTSTATUS store_v3_blob(
779 : NTSTATUS (*store_acl_blob_fsp_fn)(vfs_handle_struct *handle,
780 : files_struct *fsp,
781 : DATA_BLOB *pblob),
782 : vfs_handle_struct *handle, files_struct *fsp,
783 : struct security_descriptor *psd,
784 : struct security_descriptor *pdesc_next,
785 : uint8_t hash[XATTR_SD_HASH_SIZE])
786 : {
787 : NTSTATUS status;
788 : DATA_BLOB blob;
789 :
790 0 : if (DEBUGLEVEL >= 10) {
791 0 : DBG_DEBUG("storing xattr sd for file %s\n",
792 : fsp_str_dbg(fsp));
793 0 : NDR_PRINT_DEBUG(
794 : security_descriptor,
795 : discard_const_p(struct security_descriptor, psd));
796 :
797 0 : if (pdesc_next != NULL) {
798 0 : DBG_DEBUG("storing xattr sd based on \n");
799 0 : NDR_PRINT_DEBUG(
800 : security_descriptor,
801 : discard_const_p(struct security_descriptor,
802 : pdesc_next));
803 : } else {
804 0 : DBG_DEBUG("ignoring underlying sd\n");
805 : }
806 : }
807 0 : status = create_acl_blob(psd, &blob, XATTR_SD_HASH_TYPE_SHA256, hash);
808 0 : if (!NT_STATUS_IS_OK(status)) {
809 0 : DBG_DEBUG("create_acl_blob failed\n");
810 0 : return status;
811 : }
812 :
813 0 : status = store_acl_blob_fsp_fn(handle, fsp, &blob);
814 0 : return status;
815 : }
816 :
817 : /*********************************************************************
818 : Store a security descriptor given an fsp.
819 : *********************************************************************/
820 :
821 2382 : NTSTATUS fset_nt_acl_common(
822 : NTSTATUS (*fget_acl_blob_fn)(TALLOC_CTX *ctx,
823 : vfs_handle_struct *handle,
824 : files_struct *fsp,
825 : DATA_BLOB *pblob),
826 : NTSTATUS (*store_acl_blob_fsp_fn)(vfs_handle_struct *handle,
827 : files_struct *fsp,
828 : DATA_BLOB *pblob),
829 : const char *module_name,
830 : vfs_handle_struct *handle, files_struct *fsp,
831 : uint32_t security_info_sent,
832 : const struct security_descriptor *orig_psd)
833 : {
834 : NTSTATUS status;
835 : int ret;
836 : DATA_BLOB blob, sys_acl_blob;
837 2382 : struct security_descriptor *pdesc_next = NULL;
838 2382 : struct security_descriptor *psd = NULL;
839 : uint8_t hash[XATTR_SD_HASH_SIZE];
840 : uint8_t sys_acl_hash[XATTR_SD_HASH_SIZE];
841 2382 : bool chown_needed = false;
842 : char *sys_acl_description;
843 2382 : TALLOC_CTX *frame = talloc_stackframe();
844 4419 : bool ignore_file_system_acl = lp_parm_bool(
845 4419 : SNUM(handle->conn), module_name, "ignore system acls", false);
846 2382 : struct acl_common_fsp_ext *ext = NULL;
847 :
848 2382 : if (DEBUGLEVEL >= 10) {
849 0 : DBG_DEBUG("incoming sd for file %s\n", fsp_str_dbg(fsp));
850 0 : NDR_PRINT_DEBUG(security_descriptor,
851 : discard_const_p(struct security_descriptor, orig_psd));
852 : }
853 :
854 2382 : status = fget_nt_acl_common(fget_acl_blob_fn, handle, fsp,
855 : SECINFO_OWNER|SECINFO_GROUP|SECINFO_DACL|SECINFO_SACL,
856 : frame,
857 : &psd);
858 :
859 2382 : if (!NT_STATUS_IS_OK(status)) {
860 0 : TALLOC_FREE(frame);
861 0 : return status;
862 : }
863 :
864 2382 : psd->revision = orig_psd->revision;
865 2382 : if (security_info_sent & SECINFO_DACL) {
866 2382 : psd->type = orig_psd->type;
867 : /* All our SD's are self relative. */
868 2382 : psd->type |= SEC_DESC_SELF_RELATIVE;
869 : }
870 :
871 2382 : if ((security_info_sent & SECINFO_OWNER) && (orig_psd->owner_sid != NULL)) {
872 2373 : if (!dom_sid_equal(orig_psd->owner_sid, psd->owner_sid)) {
873 : /* We're changing the owner. */
874 1769 : chown_needed = true;
875 : }
876 2373 : psd->owner_sid = orig_psd->owner_sid;
877 : }
878 2382 : if ((security_info_sent & SECINFO_GROUP) && (orig_psd->group_sid != NULL)) {
879 2377 : if (!dom_sid_equal(orig_psd->group_sid, psd->group_sid)) {
880 : /* We're changing the group. */
881 2348 : chown_needed = true;
882 : }
883 2377 : psd->group_sid = orig_psd->group_sid;
884 : }
885 2382 : if (security_info_sent & SECINFO_DACL) {
886 2382 : if (security_descriptor_with_ms_nfs(orig_psd)) {
887 : /*
888 : * If the sd contains a MS NFS SID, do
889 : * nothing, it's a chmod() request from OS X
890 : * with AAPL context.
891 : */
892 0 : TALLOC_FREE(frame);
893 0 : return NT_STATUS_OK;
894 : }
895 2382 : psd->dacl = orig_psd->dacl;
896 2382 : psd->type |= SEC_DESC_DACL_PRESENT;
897 : }
898 2382 : if (security_info_sent & SECINFO_SACL) {
899 929 : psd->sacl = orig_psd->sacl;
900 929 : psd->type |= SEC_DESC_SACL_PRESENT;
901 : }
902 :
903 2382 : ext = VFS_ADD_FSP_EXTENSION(handle,
904 : fsp,
905 : struct acl_common_fsp_ext,
906 : NULL);
907 2382 : ext->setting_nt_acl = true;
908 :
909 2382 : if (ignore_file_system_acl) {
910 0 : if (chown_needed) {
911 : /* send only ownership stuff to lower layer */
912 0 : security_info_sent &= (SECINFO_OWNER | SECINFO_GROUP);
913 0 : status = set_underlying_acl(handle, fsp, psd,
914 : security_info_sent, true);
915 0 : if (!NT_STATUS_IS_OK(status)) {
916 0 : goto done;
917 : }
918 : }
919 0 : ZERO_ARRAY(hash);
920 0 : status = store_v3_blob(store_acl_blob_fsp_fn, handle, fsp, psd,
921 : NULL, hash);
922 0 : goto done;
923 : }
924 :
925 2382 : status = set_underlying_acl(handle, fsp, psd, security_info_sent,
926 : chown_needed);
927 2382 : if (!NT_STATUS_IS_OK(status)) {
928 0 : goto done;
929 : }
930 :
931 : /* Get the full underlying sd, then hash. */
932 2382 : status = SMB_VFS_NEXT_FGET_NT_ACL(handle,
933 : fsp,
934 : HASH_SECURITY_INFO,
935 : frame,
936 : &pdesc_next);
937 :
938 2382 : if (!NT_STATUS_IS_OK(status)) {
939 0 : goto done;
940 : }
941 :
942 2382 : status = hash_sd_sha256(pdesc_next, hash);
943 2382 : if (!NT_STATUS_IS_OK(status)) {
944 0 : goto done;
945 : }
946 :
947 : /* Get the full underlying sd, then hash. */
948 2382 : ret = SMB_VFS_NEXT_SYS_ACL_BLOB_GET_FD(handle,
949 : fsp,
950 : frame,
951 : &sys_acl_description,
952 : &sys_acl_blob);
953 :
954 : /* If we fail to get the ACL blob (for some reason) then this
955 : * is not fatal, we just work based on the NT ACL only */
956 2382 : if (ret != 0) {
957 0 : status = store_v3_blob(store_acl_blob_fsp_fn, handle, fsp, psd,
958 : pdesc_next, hash);
959 :
960 0 : goto done;
961 : }
962 :
963 2382 : status = hash_blob_sha256(sys_acl_blob, sys_acl_hash);
964 2382 : if (!NT_STATUS_IS_OK(status)) {
965 0 : goto done;
966 : }
967 :
968 2382 : if (DEBUGLEVEL >= 10) {
969 0 : DBG_DEBUG("storing xattr sd for file %s based on system ACL\n",
970 : fsp_str_dbg(fsp));
971 0 : NDR_PRINT_DEBUG(security_descriptor,
972 : discard_const_p(struct security_descriptor, psd));
973 :
974 0 : DBG_DEBUG("storing hash in xattr sd based on system ACL and:\n");
975 0 : NDR_PRINT_DEBUG(security_descriptor,
976 : discard_const_p(struct security_descriptor, pdesc_next));
977 : }
978 :
979 : /* We store hashes of both the sys ACL blob and the NT
980 : * security desciptor mapped from that ACL so as to improve
981 : * our chances against some inadvertant change breaking the
982 : * hash used */
983 2382 : status = create_sys_acl_blob(psd, &blob, XATTR_SD_HASH_TYPE_SHA256, hash,
984 : sys_acl_description, sys_acl_hash);
985 2382 : if (!NT_STATUS_IS_OK(status)) {
986 0 : DBG_DEBUG("create_sys_acl_blob failed\n");
987 0 : goto done;
988 : }
989 :
990 2382 : status = store_acl_blob_fsp_fn(handle, fsp, &blob);
991 :
992 2382 : done:
993 2382 : VFS_REMOVE_FSP_EXTENSION(handle, fsp);
994 2382 : TALLOC_FREE(frame);
995 2382 : return status;
996 : }
997 :
998 0 : static int acl_common_remove_object(vfs_handle_struct *handle,
999 : struct files_struct *dirfsp,
1000 : const struct smb_filename *smb_fname,
1001 : bool is_directory)
1002 : {
1003 0 : connection_struct *conn = handle->conn;
1004 : struct file_id id;
1005 0 : files_struct *fsp = NULL;
1006 0 : int ret = 0;
1007 0 : struct smb_filename *full_fname = NULL;
1008 0 : struct smb_filename *local_fname = NULL;
1009 0 : struct smb_filename *parent_dir_fname = NULL;
1010 0 : int saved_errno = 0;
1011 0 : struct smb_filename *saved_dir_fname = NULL;
1012 : NTSTATUS status;
1013 :
1014 0 : saved_dir_fname = vfs_GetWd(talloc_tos(),conn);
1015 0 : if (saved_dir_fname == NULL) {
1016 0 : saved_errno = errno;
1017 0 : goto out;
1018 : }
1019 :
1020 0 : full_fname = full_path_from_dirfsp_atname(talloc_tos(),
1021 : dirfsp,
1022 : smb_fname);
1023 0 : if (full_fname == NULL) {
1024 0 : goto out;
1025 : }
1026 :
1027 0 : status = SMB_VFS_PARENT_PATHNAME(conn,
1028 : talloc_tos(),
1029 : full_fname,
1030 : &parent_dir_fname,
1031 : &local_fname);
1032 0 : if (!NT_STATUS_IS_OK(status)) {
1033 0 : saved_errno = map_errno_from_nt_status(status);
1034 0 : goto out;
1035 : }
1036 :
1037 0 : DBG_DEBUG("removing %s %s\n", is_directory ? "directory" : "file",
1038 : smb_fname_str_dbg(full_fname));
1039 :
1040 : /* cd into the parent dir to pin it. */
1041 0 : ret = vfs_ChDir(conn, parent_dir_fname);
1042 0 : if (ret == -1) {
1043 0 : saved_errno = errno;
1044 0 : goto out;
1045 : }
1046 :
1047 : /* Must use lstat here. */
1048 0 : ret = SMB_VFS_LSTAT(conn, local_fname);
1049 0 : if (ret == -1) {
1050 0 : saved_errno = errno;
1051 0 : goto out;
1052 : }
1053 :
1054 : /* Ensure we have this file open with DELETE access. */
1055 0 : id = vfs_file_id_from_sbuf(conn, &local_fname->st);
1056 0 : for (fsp = file_find_di_first(conn->sconn, id, true); fsp;
1057 0 : fsp = file_find_di_next(fsp, true)) {
1058 0 : if (fsp->access_mask & DELETE_ACCESS &&
1059 : fsp->fsp_flags.delete_on_close)
1060 : {
1061 : /* We did open this for delete,
1062 : * allow the delete as root.
1063 : */
1064 0 : break;
1065 : }
1066 : }
1067 :
1068 0 : if (!fsp) {
1069 0 : DBG_DEBUG("%s %s not an open file\n",
1070 : is_directory ? "directory" : "file",
1071 : smb_fname_str_dbg(full_fname));
1072 0 : saved_errno = EACCES;
1073 0 : goto out;
1074 : }
1075 :
1076 0 : become_root();
1077 0 : if (is_directory) {
1078 0 : ret = SMB_VFS_NEXT_UNLINKAT(handle,
1079 : dirfsp,
1080 : smb_fname,
1081 : AT_REMOVEDIR);
1082 : } else {
1083 0 : ret = SMB_VFS_NEXT_UNLINKAT(handle,
1084 : dirfsp,
1085 : smb_fname,
1086 : 0);
1087 : }
1088 0 : unbecome_root();
1089 :
1090 0 : if (ret == -1) {
1091 0 : saved_errno = errno;
1092 : }
1093 :
1094 0 : out:
1095 :
1096 0 : TALLOC_FREE(parent_dir_fname);
1097 0 : TALLOC_FREE(full_fname);
1098 :
1099 0 : if (saved_dir_fname) {
1100 0 : vfs_ChDir(conn, saved_dir_fname);
1101 0 : TALLOC_FREE(saved_dir_fname);
1102 : }
1103 0 : if (saved_errno) {
1104 0 : errno = saved_errno;
1105 : }
1106 0 : return ret;
1107 : }
1108 :
1109 804 : int rmdir_acl_common(struct vfs_handle_struct *handle,
1110 : struct files_struct *dirfsp,
1111 : const struct smb_filename *smb_fname)
1112 : {
1113 : int ret;
1114 :
1115 : /* Try the normal rmdir first. */
1116 804 : ret = SMB_VFS_NEXT_UNLINKAT(handle,
1117 : dirfsp,
1118 : smb_fname,
1119 : AT_REMOVEDIR);
1120 804 : if (ret == 0) {
1121 804 : return 0;
1122 : }
1123 0 : if (errno == EACCES || errno == EPERM) {
1124 : /* Failed due to access denied,
1125 : see if we need to root override. */
1126 0 : return acl_common_remove_object(handle,
1127 : dirfsp,
1128 : smb_fname,
1129 : true);
1130 : }
1131 :
1132 0 : DBG_DEBUG("unlink of %s failed %s\n",
1133 : smb_fname->base_name,
1134 : strerror(errno));
1135 0 : return -1;
1136 : }
1137 :
1138 573 : int unlink_acl_common(struct vfs_handle_struct *handle,
1139 : struct files_struct *dirfsp,
1140 : const struct smb_filename *smb_fname,
1141 : int flags)
1142 : {
1143 : int ret;
1144 :
1145 : /* Try the normal unlink first. */
1146 573 : ret = SMB_VFS_NEXT_UNLINKAT(handle,
1147 : dirfsp,
1148 : smb_fname,
1149 : flags);
1150 573 : if (ret == 0) {
1151 573 : return 0;
1152 : }
1153 0 : if (errno == EACCES || errno == EPERM) {
1154 : /* Failed due to access denied,
1155 : see if we need to root override. */
1156 :
1157 : /* Don't do anything fancy for streams. */
1158 0 : if (smb_fname->stream_name) {
1159 0 : return -1;
1160 : }
1161 0 : return acl_common_remove_object(handle,
1162 : dirfsp,
1163 : smb_fname,
1164 : false);
1165 : }
1166 :
1167 0 : DBG_DEBUG("unlink of %s failed %s\n",
1168 : smb_fname->base_name,
1169 : strerror(errno));
1170 0 : return -1;
1171 : }
1172 :
1173 0 : int fchmod_acl_module_common(struct vfs_handle_struct *handle,
1174 : struct files_struct *fsp, mode_t mode)
1175 : {
1176 0 : if (fsp->posix_flags & FSP_POSIX_FLAGS_PATHNAMES
1177 0 : || fsp->fsp_name->flags & SMB_FILENAME_POSIX_PATH) {
1178 : /* Only allow this on POSIX opens. */
1179 0 : return SMB_VFS_NEXT_FCHMOD(handle, fsp, mode);
1180 : }
1181 0 : return 0;
1182 : }
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