Line data Source code
1 : /*
2 : Unix SMB/CIFS implementation.
3 :
4 : module to store/fetch session keys for the schannel server
5 :
6 : Copyright (C) Andrew Tridgell 2004
7 : Copyright (C) Andrew Bartlett <abartlet@samba.org> 2006-2009
8 : Copyright (C) Guenther Deschner 2009
9 :
10 : This program is free software; you can redistribute it and/or modify
11 : it under the terms of the GNU General Public License as published by
12 : the Free Software Foundation; either version 3 of the License, or
13 : (at your option) any later version.
14 :
15 : This program is distributed in the hope that it will be useful,
16 : but WITHOUT ANY WARRANTY; without even the implied warranty of
17 : MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 : GNU General Public License for more details.
19 :
20 : You should have received a copy of the GNU General Public License
21 : along with this program. If not, see <http://www.gnu.org/licenses/>.
22 : */
23 :
24 : #include "includes.h"
25 : #include "system/filesys.h"
26 : #include "../lib/tdb/include/tdb.h"
27 : #include "../lib/util/util_tdb.h"
28 : #include "../lib/param/param.h"
29 : #include "../libcli/auth/schannel.h"
30 : #include "../librpc/gen_ndr/ndr_schannel.h"
31 : #include "lib/dbwrap/dbwrap.h"
32 :
33 : #define SECRETS_SCHANNEL_STATE "SECRETS/SCHANNEL"
34 :
35 : /******************************************************************************
36 : Open or create the schannel session store tdb. Non-static so it can
37 : be called from parent processes to corectly handle TDB_CLEAR_IF_FIRST
38 : *******************************************************************************/
39 :
40 20197 : struct db_context *open_schannel_session_store(TALLOC_CTX *mem_ctx,
41 : struct loadparm_context *lp_ctx)
42 : {
43 20197 : struct db_context *db_sc = NULL;
44 20197 : char *fname = lpcfg_private_db_path(mem_ctx, lp_ctx, "schannel_store");
45 : int hash_size, tdb_flags;
46 :
47 20197 : if (!fname) {
48 0 : return NULL;
49 : }
50 :
51 20197 : hash_size = lpcfg_tdb_hash_size(lp_ctx, fname);
52 20197 : tdb_flags = lpcfg_tdb_flags(lp_ctx, TDB_CLEAR_IF_FIRST|TDB_NOSYNC);
53 :
54 20197 : db_sc = dbwrap_local_open(
55 : mem_ctx,
56 : fname,
57 : hash_size,
58 : tdb_flags,
59 : O_RDWR|O_CREAT,
60 : 0600,
61 : DBWRAP_LOCK_ORDER_NONE,
62 : DBWRAP_FLAG_NONE);
63 :
64 20197 : if (!db_sc) {
65 0 : DEBUG(0,("open_schannel_session_store: Failed to open %s - %s\n",
66 : fname, strerror(errno)));
67 0 : TALLOC_FREE(fname);
68 0 : return NULL;
69 : }
70 :
71 20197 : TALLOC_FREE(fname);
72 :
73 20197 : return db_sc;
74 : }
75 :
76 : /********************************************************************
77 : ********************************************************************/
78 :
79 : static
80 8157 : NTSTATUS schannel_store_session_key_tdb(struct db_context *db_sc,
81 : TALLOC_CTX *mem_ctx,
82 : struct netlogon_creds_CredentialState *creds)
83 : {
84 : enum ndr_err_code ndr_err;
85 : DATA_BLOB blob;
86 : TDB_DATA value;
87 : char *keystr;
88 : char *name_upper;
89 : NTSTATUS status;
90 :
91 8157 : if (strlen(creds->computer_name) > 15) {
92 : /*
93 : * We may want to check for a completely
94 : * valid netbios name.
95 : */
96 9 : return STATUS_BUFFER_OVERFLOW;
97 : }
98 :
99 8148 : name_upper = strupper_talloc(mem_ctx, creds->computer_name);
100 8148 : if (!name_upper) {
101 0 : return NT_STATUS_NO_MEMORY;
102 : }
103 :
104 8148 : keystr = talloc_asprintf(mem_ctx, "%s/%s",
105 : SECRETS_SCHANNEL_STATE, name_upper);
106 8148 : TALLOC_FREE(name_upper);
107 8148 : if (!keystr) {
108 0 : return NT_STATUS_NO_MEMORY;
109 : }
110 :
111 8148 : ndr_err = ndr_push_struct_blob(&blob, mem_ctx, creds,
112 : (ndr_push_flags_fn_t)ndr_push_netlogon_creds_CredentialState);
113 8148 : if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
114 0 : talloc_free(keystr);
115 0 : return ndr_map_error2ntstatus(ndr_err);
116 : }
117 :
118 8148 : value.dptr = blob.data;
119 8148 : value.dsize = blob.length;
120 :
121 8148 : status = dbwrap_store_bystring(db_sc, keystr, value, TDB_REPLACE);
122 8148 : if (!NT_STATUS_IS_OK(status)) {
123 0 : DEBUG(0,("Unable to add %s to session key db - %s\n",
124 : keystr, nt_errstr(status)));
125 0 : talloc_free(keystr);
126 0 : return status;
127 : }
128 :
129 8148 : DEBUG(3,("schannel_store_session_key_tdb: stored schannel info with key %s\n",
130 : keystr));
131 :
132 8148 : if (DEBUGLEVEL >= 10) {
133 0 : NDR_PRINT_DEBUG(netlogon_creds_CredentialState, creds);
134 : }
135 :
136 8148 : talloc_free(keystr);
137 :
138 8148 : return NT_STATUS_OK;
139 : }
140 :
141 : /********************************************************************
142 : ********************************************************************/
143 :
144 : static
145 12978 : NTSTATUS schannel_fetch_session_key_tdb(struct db_context *db_sc,
146 : TALLOC_CTX *mem_ctx,
147 : const char *computer_name,
148 : struct netlogon_creds_CredentialState **pcreds)
149 : {
150 : NTSTATUS status;
151 : TDB_DATA value;
152 : enum ndr_err_code ndr_err;
153 : DATA_BLOB blob;
154 12978 : struct netlogon_creds_CredentialState *creds = NULL;
155 12978 : char *keystr = NULL;
156 : char *name_upper;
157 :
158 12978 : *pcreds = NULL;
159 :
160 12978 : name_upper = strupper_talloc(mem_ctx, computer_name);
161 12978 : if (!name_upper) {
162 0 : return NT_STATUS_NO_MEMORY;
163 : }
164 :
165 12978 : keystr = talloc_asprintf(mem_ctx, "%s/%s",
166 : SECRETS_SCHANNEL_STATE, name_upper);
167 12978 : TALLOC_FREE(name_upper);
168 12978 : if (!keystr) {
169 0 : return NT_STATUS_NO_MEMORY;
170 : }
171 :
172 12978 : status = dbwrap_fetch_bystring(db_sc, keystr, keystr, &value);
173 12978 : if (!NT_STATUS_IS_OK(status)) {
174 6 : DEBUG(10,("schannel_fetch_session_key_tdb: Failed to find entry with key %s\n",
175 : keystr ));
176 6 : goto done;
177 : }
178 :
179 12972 : creds = talloc_zero(mem_ctx, struct netlogon_creds_CredentialState);
180 12972 : if (!creds) {
181 0 : status = NT_STATUS_NO_MEMORY;
182 0 : goto done;
183 : }
184 :
185 12972 : blob = data_blob_const(value.dptr, value.dsize);
186 :
187 12972 : ndr_err = ndr_pull_struct_blob(&blob, creds, creds,
188 : (ndr_pull_flags_fn_t)ndr_pull_netlogon_creds_CredentialState);
189 12972 : if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
190 0 : status = ndr_map_error2ntstatus(ndr_err);
191 0 : goto done;
192 : }
193 :
194 12972 : if (DEBUGLEVEL >= 10) {
195 0 : NDR_PRINT_DEBUG(netlogon_creds_CredentialState, creds);
196 : }
197 :
198 12972 : DEBUG(3,("schannel_fetch_session_key_tdb: restored schannel info key %s\n",
199 : keystr));
200 :
201 12972 : status = NT_STATUS_OK;
202 :
203 12978 : done:
204 :
205 12978 : talloc_free(keystr);
206 :
207 12978 : if (!NT_STATUS_IS_OK(status)) {
208 6 : talloc_free(creds);
209 6 : return status;
210 : }
211 :
212 12972 : *pcreds = creds;
213 :
214 12972 : return NT_STATUS_OK;
215 : }
216 :
217 : /******************************************************************************
218 : Wrapper around schannel_fetch_session_key_tdb()
219 : Note we must be root here.
220 : *******************************************************************************/
221 :
222 5783 : NTSTATUS schannel_get_creds_state(TALLOC_CTX *mem_ctx,
223 : struct loadparm_context *lp_ctx,
224 : const char *computer_name,
225 : struct netlogon_creds_CredentialState **_creds)
226 : {
227 : TALLOC_CTX *tmpctx;
228 : struct db_context *db_sc;
229 : struct netlogon_creds_CredentialState *creds;
230 : NTSTATUS status;
231 :
232 5783 : tmpctx = talloc_named(mem_ctx, 0, "schannel_get_creds_state");
233 5783 : if (!tmpctx) {
234 0 : return NT_STATUS_NO_MEMORY;
235 : }
236 :
237 5783 : db_sc = open_schannel_session_store(tmpctx, lp_ctx);
238 5783 : if (!db_sc) {
239 0 : TALLOC_FREE(tmpctx);
240 0 : return NT_STATUS_ACCESS_DENIED;
241 : }
242 :
243 5783 : status = schannel_fetch_session_key_tdb(db_sc, tmpctx,
244 : computer_name, &creds);
245 5783 : if (NT_STATUS_IS_OK(status)) {
246 5783 : *_creds = talloc_steal(mem_ctx, creds);
247 5783 : if (!*_creds) {
248 0 : status = NT_STATUS_NO_MEMORY;
249 : }
250 : }
251 :
252 5783 : talloc_free(tmpctx);
253 5783 : return status;
254 : }
255 :
256 : /******************************************************************************
257 : Wrapper around schannel_store_session_key_tdb()
258 : Note we must be root here.
259 : *******************************************************************************/
260 :
261 968 : NTSTATUS schannel_save_creds_state(TALLOC_CTX *mem_ctx,
262 : struct loadparm_context *lp_ctx,
263 : struct netlogon_creds_CredentialState *creds)
264 : {
265 : TALLOC_CTX *tmpctx;
266 : struct db_context *db_sc;
267 : NTSTATUS status;
268 :
269 968 : tmpctx = talloc_named(mem_ctx, 0, "schannel_save_creds_state");
270 968 : if (!tmpctx) {
271 0 : return NT_STATUS_NO_MEMORY;
272 : }
273 :
274 968 : db_sc = open_schannel_session_store(tmpctx, lp_ctx);
275 968 : if (!db_sc) {
276 0 : status = NT_STATUS_ACCESS_DENIED;
277 0 : goto fail;
278 : }
279 :
280 968 : status = schannel_store_session_key_tdb(db_sc, tmpctx, creds);
281 :
282 968 : fail:
283 968 : talloc_free(tmpctx);
284 968 : return status;
285 : }
286 :
287 :
288 : /*
289 : * Create a very lossy hash of the computer name.
290 : *
291 : * The idea here is to compress the computer name into small space so
292 : * that malicious clients cannot fill the database with junk, as only a
293 : * maximum of 16k of entries are possible.
294 : *
295 : * Collisions are certainly possible, and the design behaves in the
296 : * same way as when the hostname is reused, but clients that use the
297 : * same connection do not go via the cache, and the cache only needs
298 : * to function between the ReqChallenge and ServerAuthenticate
299 : * packets.
300 : */
301 6202 : static void hash_computer_name(const char *computer_name,
302 : char keystr[16])
303 : {
304 : unsigned int hash;
305 12264 : TDB_DATA computer_tdb_data = {
306 : .dptr = (uint8_t *)discard_const_p(char, computer_name),
307 6202 : .dsize = strlen(computer_name)
308 : };
309 6202 : hash = tdb_jenkins_hash(&computer_tdb_data);
310 :
311 : /* we are using 14 bits of the digest to index our connections, so
312 : that we use at most 16,384 buckets.*/
313 6202 : snprintf(keystr, 15, "CHALLENGE/%x%x", hash & 0xFF,
314 : (hash & 0xFF00 >> 8) & 0x3f);
315 6202 : return;
316 : }
317 :
318 :
319 : static
320 5085 : NTSTATUS schannel_store_challenge_tdb(struct db_context *db_sc,
321 : TALLOC_CTX *mem_ctx,
322 : const struct netr_Credential *client_challenge,
323 : const struct netr_Credential *server_challenge,
324 : const char *computer_name)
325 : {
326 : enum ndr_err_code ndr_err;
327 : DATA_BLOB blob;
328 : TDB_DATA value;
329 5085 : char *name_upper = NULL;
330 : NTSTATUS status;
331 5085 : char keystr[16] = { 0, };
332 : struct netlogon_cache_entry cache_entry;
333 :
334 5085 : if (strlen(computer_name) > 255) {
335 : /*
336 : * We don't make this a limit at 15 chars as Samba has
337 : * a test showing this can be longer :-(
338 : */
339 0 : return STATUS_BUFFER_OVERFLOW;
340 : }
341 :
342 5085 : name_upper = strupper_talloc(mem_ctx, computer_name);
343 5085 : if (name_upper == NULL) {
344 0 : return NT_STATUS_NO_MEMORY;
345 : }
346 :
347 5085 : hash_computer_name(name_upper, keystr);
348 :
349 5085 : cache_entry.computer_name = name_upper;
350 5085 : cache_entry.client_challenge = *client_challenge;
351 5085 : cache_entry.server_challenge = *server_challenge;
352 :
353 5085 : ndr_err = ndr_push_struct_blob(&blob, mem_ctx, &cache_entry,
354 : (ndr_push_flags_fn_t)ndr_push_netlogon_cache_entry);
355 5085 : if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
356 0 : return NT_STATUS_UNSUCCESSFUL;
357 : }
358 :
359 5085 : value.dptr = blob.data;
360 5085 : value.dsize = blob.length;
361 :
362 5085 : status = dbwrap_store_bystring(db_sc, keystr, value, TDB_REPLACE);
363 5085 : if (!NT_STATUS_IS_OK(status)) {
364 0 : DEBUG(0,("%s: failed to stored challenge info for '%s' "
365 : "with key %s - %s\n",
366 : __func__, cache_entry.computer_name, keystr,
367 : nt_errstr(status)));
368 0 : return status;
369 : }
370 :
371 5085 : DEBUG(3,("%s: stored challenge info for '%s' with key %s\n",
372 : __func__, cache_entry.computer_name, keystr));
373 :
374 5085 : if (DEBUGLEVEL >= 10) {
375 0 : NDR_PRINT_DEBUG(netlogon_cache_entry, &cache_entry);
376 : }
377 :
378 5085 : return NT_STATUS_OK;
379 : }
380 :
381 : /********************************************************************
382 : Fetch a single challenge from the TDB.
383 : ********************************************************************/
384 :
385 : static
386 72 : NTSTATUS schannel_fetch_challenge_tdb(struct db_context *db_sc,
387 : TALLOC_CTX *mem_ctx,
388 : struct netr_Credential *client_challenge,
389 : struct netr_Credential *server_challenge,
390 : const char *computer_name)
391 : {
392 : NTSTATUS status;
393 : TDB_DATA value;
394 : enum ndr_err_code ndr_err;
395 : DATA_BLOB blob;
396 72 : char keystr[16] = { 0, };
397 : struct netlogon_cache_entry cache_entry;
398 72 : char *name_upper = NULL;
399 :
400 72 : name_upper = strupper_talloc(mem_ctx, computer_name);
401 72 : if (name_upper == NULL) {
402 0 : return NT_STATUS_NO_MEMORY;
403 : }
404 :
405 72 : hash_computer_name(name_upper, keystr);
406 :
407 72 : status = dbwrap_fetch_bystring(db_sc, mem_ctx, keystr, &value);
408 72 : if (!NT_STATUS_IS_OK(status)) {
409 36 : DEBUG(3,("%s: Failed to find entry for %s with key %s - %s\n",
410 : __func__, name_upper, keystr, nt_errstr(status)));
411 36 : goto done;
412 : }
413 :
414 36 : blob = data_blob_const(value.dptr, value.dsize);
415 :
416 36 : ndr_err = ndr_pull_struct_blob_all(&blob, mem_ctx, &cache_entry,
417 : (ndr_pull_flags_fn_t)ndr_pull_netlogon_cache_entry);
418 36 : if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
419 0 : status = ndr_map_error2ntstatus(ndr_err);
420 0 : DEBUG(3,("%s: Failed to parse entry for %s with key %s - %s\n",
421 : __func__, name_upper, keystr, nt_errstr(status)));
422 0 : goto done;
423 : }
424 :
425 36 : if (DEBUGLEVEL >= 10) {
426 0 : NDR_PRINT_DEBUG(netlogon_cache_entry, &cache_entry);
427 : }
428 :
429 36 : if (strcmp(cache_entry.computer_name, name_upper) != 0) {
430 0 : status = NT_STATUS_NOT_FOUND;
431 :
432 0 : DEBUG(1, ("%s: HASH COLLISION with key %s ! "
433 : "Wanted to fetch record for %s but got %s.",
434 : __func__, keystr, name_upper,
435 : cache_entry.computer_name));
436 : } else {
437 :
438 36 : DEBUG(3,("%s: restored key %s for %s\n",
439 : __func__, keystr, cache_entry.computer_name));
440 :
441 36 : *client_challenge = cache_entry.client_challenge;
442 36 : *server_challenge = cache_entry.server_challenge;
443 : }
444 72 : done:
445 :
446 72 : if (!NT_STATUS_IS_OK(status)) {
447 36 : return status;
448 : }
449 :
450 36 : return NT_STATUS_OK;
451 : }
452 :
453 : /******************************************************************************
454 : Wrapper around schannel_fetch_challenge_tdb()
455 : Note we must be root here.
456 :
457 : *******************************************************************************/
458 :
459 72 : NTSTATUS schannel_get_challenge(struct loadparm_context *lp_ctx,
460 : struct netr_Credential *client_challenge,
461 : struct netr_Credential *server_challenge,
462 : const char *computer_name)
463 : {
464 72 : TALLOC_CTX *frame = talloc_stackframe();
465 : struct db_context *db_sc;
466 : NTSTATUS status;
467 :
468 72 : db_sc = open_schannel_session_store(frame, lp_ctx);
469 72 : if (!db_sc) {
470 0 : TALLOC_FREE(frame);
471 0 : return NT_STATUS_ACCESS_DENIED;
472 : }
473 :
474 72 : status = schannel_fetch_challenge_tdb(db_sc, frame,
475 : client_challenge,
476 : server_challenge,
477 : computer_name);
478 72 : TALLOC_FREE(frame);
479 72 : return status;
480 : }
481 :
482 : /******************************************************************************
483 : Wrapper around dbwrap_delete_bystring()
484 : Note we must be root here.
485 :
486 : This allows the challenge to be removed from the TDB, which should be
487 : as soon as the TDB or in-memory copy it is used, to avoid reuse.
488 : *******************************************************************************/
489 :
490 1045 : NTSTATUS schannel_delete_challenge(struct loadparm_context *lp_ctx,
491 : const char *computer_name)
492 : {
493 1045 : TALLOC_CTX *frame = talloc_stackframe();
494 : struct db_context *db_sc;
495 : char *name_upper;
496 1045 : char keystr[16] = { 0, };
497 :
498 1045 : db_sc = open_schannel_session_store(frame, lp_ctx);
499 1045 : if (!db_sc) {
500 0 : TALLOC_FREE(frame);
501 0 : return NT_STATUS_ACCESS_DENIED;
502 : }
503 :
504 1045 : name_upper = strupper_talloc(frame, computer_name);
505 1045 : if (!name_upper) {
506 0 : TALLOC_FREE(frame);
507 0 : return NT_STATUS_NO_MEMORY;
508 : }
509 :
510 1045 : hash_computer_name(name_upper, keystr);
511 :
512 : /* Now delete it, we do not want to permit fetch of this twice */
513 1045 : dbwrap_delete_bystring(db_sc, keystr);
514 :
515 1045 : TALLOC_FREE(frame);
516 1045 : return NT_STATUS_OK;
517 : }
518 :
519 : /******************************************************************************
520 : Wrapper around schannel_store_session_key_tdb()
521 : Note we must be root here.
522 : *******************************************************************************/
523 :
524 5085 : NTSTATUS schannel_save_challenge(struct loadparm_context *lp_ctx,
525 : const struct netr_Credential *client_challenge,
526 : const struct netr_Credential *server_challenge,
527 : const char *computer_name)
528 : {
529 5085 : TALLOC_CTX *frame = talloc_stackframe();
530 : struct db_context *db_sc;
531 : NTSTATUS status;
532 :
533 5085 : db_sc = open_schannel_session_store(frame, lp_ctx);
534 5085 : if (!db_sc) {
535 0 : TALLOC_FREE(frame);
536 0 : return NT_STATUS_ACCESS_DENIED;
537 : }
538 :
539 5085 : status = schannel_store_challenge_tdb(db_sc, frame,
540 : client_challenge,
541 : server_challenge,
542 : computer_name);
543 :
544 5085 : TALLOC_FREE(frame);
545 5085 : return status;
546 : }
547 :
548 : /********************************************************************
549 : Validate an incoming authenticator against the credentials for the
550 : remote machine stored in the schannel database.
551 :
552 : The credentials are (re)read and from the schannel database, and
553 : written back after the caclulations are performed.
554 :
555 : If the creds_out parameter is not NULL returns the credentials.
556 : ********************************************************************/
557 :
558 7195 : NTSTATUS schannel_check_creds_state(TALLOC_CTX *mem_ctx,
559 : struct loadparm_context *lp_ctx,
560 : const char *computer_name,
561 : struct netr_Authenticator *received_authenticator,
562 : struct netr_Authenticator *return_authenticator,
563 : struct netlogon_creds_CredentialState **creds_out)
564 : {
565 : TALLOC_CTX *tmpctx;
566 : struct db_context *db_sc;
567 : struct netlogon_creds_CredentialState *creds;
568 : NTSTATUS status;
569 7195 : char *name_upper = NULL;
570 7195 : char *keystr = NULL;
571 : struct db_record *record;
572 : TDB_DATA key;
573 :
574 7195 : if (creds_out != NULL) {
575 7195 : *creds_out = NULL;
576 : }
577 :
578 7195 : tmpctx = talloc_named(mem_ctx, 0, "schannel_check_creds_state");
579 7195 : if (!tmpctx) {
580 0 : return NT_STATUS_NO_MEMORY;
581 : }
582 :
583 7195 : name_upper = strupper_talloc(tmpctx, computer_name);
584 7195 : if (!name_upper) {
585 0 : status = NT_STATUS_NO_MEMORY;
586 0 : goto done;
587 : }
588 :
589 7195 : keystr = talloc_asprintf(tmpctx, "%s/%s",
590 : SECRETS_SCHANNEL_STATE, name_upper);
591 7195 : if (!keystr) {
592 0 : status = NT_STATUS_NO_MEMORY;
593 0 : goto done;
594 : }
595 :
596 7195 : key = string_term_tdb_data(keystr);
597 :
598 7195 : db_sc = open_schannel_session_store(tmpctx, lp_ctx);
599 7195 : if (!db_sc) {
600 0 : status = NT_STATUS_ACCESS_DENIED;
601 0 : goto done;
602 : }
603 :
604 7195 : record = dbwrap_fetch_locked(db_sc, tmpctx, key);
605 7195 : if (!record) {
606 0 : status = NT_STATUS_INTERNAL_DB_CORRUPTION;
607 0 : goto done;
608 : }
609 :
610 : /* Because this is a shared structure (even across
611 : * disconnects) we must update the database every time we
612 : * update the structure */
613 :
614 7195 : status = schannel_fetch_session_key_tdb(db_sc, tmpctx,
615 : computer_name, &creds);
616 7195 : if (!NT_STATUS_IS_OK(status)) {
617 6 : goto done;
618 : }
619 :
620 7189 : status = netlogon_creds_server_step_check(creds,
621 : received_authenticator,
622 : return_authenticator);
623 7189 : if (!NT_STATUS_IS_OK(status)) {
624 0 : goto done;
625 : }
626 :
627 7189 : status = schannel_store_session_key_tdb(db_sc, tmpctx, creds);
628 7189 : if (!NT_STATUS_IS_OK(status)) {
629 0 : goto done;
630 : }
631 :
632 7189 : if (creds_out) {
633 7189 : *creds_out = talloc_steal(mem_ctx, creds);
634 7189 : if (!*creds_out) {
635 0 : status = NT_STATUS_NO_MEMORY;
636 0 : goto done;
637 : }
638 : }
639 :
640 7189 : status = NT_STATUS_OK;
641 :
642 7195 : done:
643 7195 : talloc_free(tmpctx);
644 7195 : return status;
645 : }
646 :
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