source: vendor/3.6.0/source3/auth/server_info.c

Last change on this file was 740, checked in by Silvan Scherrer, 13 years ago

Samba Server: update vendor to 3.6.0
File size: 19.0 KB
Line 
1/*
2 Unix SMB/CIFS implementation.
3 Authentication utility functions
4 Copyright (C) Volker Lendecke 2010
5
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
10
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>.
18*/
19
20#include "includes.h"
21#include "auth.h"
22#include "../lib/crypto/arcfour.h"
23#include "../librpc/gen_ndr/netlogon.h"
24#include "../libcli/security/security.h"
25#include "rpc_client/util_netlogon.h"
26#include "nsswitch/libwbclient/wbclient.h"
27#include "passdb.h"
28
29#undef DBGC_CLASS
30#define DBGC_CLASS DBGC_AUTH
31
32/* FIXME: do we really still need this ? */
33static int server_info_dtor(struct auth_serversupplied_info *server_info)
34{
35 TALLOC_FREE(server_info->info3);
36 ZERO_STRUCTP(server_info);
37 return 0;
38}
39
40/***************************************************************************
41 Make a server_info struct. Free with TALLOC_FREE().
42***************************************************************************/
43
44struct auth_serversupplied_info *make_server_info(TALLOC_CTX *mem_ctx)
45{
46 struct auth_serversupplied_info *result;
47
48 result = TALLOC_ZERO_P(mem_ctx, struct auth_serversupplied_info);
49 if (result == NULL) {
50 DEBUG(0, ("talloc failed\n"));
51 return NULL;
52 }
53
54 talloc_set_destructor(result, server_info_dtor);
55
56 /* Initialise the uid and gid values to something non-zero
57 which may save us from giving away root access if there
58 is a bug in allocating these fields. */
59
60 result->utok.uid = -1;
61 result->utok.gid = -1;
62
63 return result;
64}
65
66/****************************************************************************
67 inits a netr_SamInfo2 structure from an auth_serversupplied_info. sam2 must
68 already be initialized and is used as the talloc parent for its members.
69*****************************************************************************/
70
71NTSTATUS serverinfo_to_SamInfo2(struct auth_serversupplied_info *server_info,
72 uint8_t *pipe_session_key,
73 size_t pipe_session_key_len,
74 struct netr_SamInfo2 *sam2)
75{
76 struct netr_SamInfo3 *info3;
77
78 info3 = copy_netr_SamInfo3(sam2, server_info->info3);
79 if (!info3) {
80 return NT_STATUS_NO_MEMORY;
81 }
82
83 if (server_info->user_session_key.length) {
84 memcpy(info3->base.key.key,
85 server_info->user_session_key.data,
86 MIN(sizeof(info3->base.key.key),
87 server_info->user_session_key.length));
88 if (pipe_session_key) {
89 arcfour_crypt(info3->base.key.key,
90 pipe_session_key, 16);
91 }
92 }
93 if (server_info->lm_session_key.length) {
94 memcpy(info3->base.LMSessKey.key,
95 server_info->lm_session_key.data,
96 MIN(sizeof(info3->base.LMSessKey.key),
97 server_info->lm_session_key.length));
98 if (pipe_session_key) {
99 arcfour_crypt(info3->base.LMSessKey.key,
100 pipe_session_key, 8);
101 }
102 }
103
104 sam2->base = info3->base;
105
106 return NT_STATUS_OK;
107}
108
109/****************************************************************************
110 inits a netr_SamInfo3 structure from an auth_serversupplied_info. sam3 must
111 already be initialized and is used as the talloc parent for its members.
112*****************************************************************************/
113
114NTSTATUS serverinfo_to_SamInfo3(const struct auth_serversupplied_info *server_info,
115 uint8_t *pipe_session_key,
116 size_t pipe_session_key_len,
117 struct netr_SamInfo3 *sam3)
118{
119 struct netr_SamInfo3 *info3;
120
121 info3 = copy_netr_SamInfo3(sam3, server_info->info3);
122 if (!info3) {
123 return NT_STATUS_NO_MEMORY;
124 }
125
126 if (server_info->user_session_key.length) {
127 memcpy(info3->base.key.key,
128 server_info->user_session_key.data,
129 MIN(sizeof(info3->base.key.key),
130 server_info->user_session_key.length));
131 if (pipe_session_key) {
132 arcfour_crypt(info3->base.key.key,
133 pipe_session_key, 16);
134 }
135 }
136 if (server_info->lm_session_key.length) {
137 memcpy(info3->base.LMSessKey.key,
138 server_info->lm_session_key.data,
139 MIN(sizeof(info3->base.LMSessKey.key),
140 server_info->lm_session_key.length));
141 if (pipe_session_key) {
142 arcfour_crypt(info3->base.LMSessKey.key,
143 pipe_session_key, 8);
144 }
145 }
146
147 sam3->base = info3->base;
148
149 sam3->sidcount = 0;
150 sam3->sids = NULL;
151
152 return NT_STATUS_OK;
153}
154
155/****************************************************************************
156 inits a netr_SamInfo6 structure from an auth_serversupplied_info. sam6 must
157 already be initialized and is used as the talloc parent for its members.
158*****************************************************************************/
159
160NTSTATUS serverinfo_to_SamInfo6(struct auth_serversupplied_info *server_info,
161 uint8_t *pipe_session_key,
162 size_t pipe_session_key_len,
163 struct netr_SamInfo6 *sam6)
164{
165 struct pdb_domain_info *dominfo;
166 struct netr_SamInfo3 *info3;
167
168 if ((pdb_capabilities() & PDB_CAP_ADS) == 0) {
169 DEBUG(10,("Not adding validation info level 6 "
170 "without ADS passdb backend\n"));
171 return NT_STATUS_INVALID_INFO_CLASS;
172 }
173
174 dominfo = pdb_get_domain_info(sam6);
175 if (dominfo == NULL) {
176 return NT_STATUS_NO_MEMORY;
177 }
178
179 info3 = copy_netr_SamInfo3(sam6, server_info->info3);
180 if (!info3) {
181 return NT_STATUS_NO_MEMORY;
182 }
183
184 if (server_info->user_session_key.length) {
185 memcpy(info3->base.key.key,
186 server_info->user_session_key.data,
187 MIN(sizeof(info3->base.key.key),
188 server_info->user_session_key.length));
189 if (pipe_session_key) {
190 arcfour_crypt(info3->base.key.key,
191 pipe_session_key, 16);
192 }
193 }
194 if (server_info->lm_session_key.length) {
195 memcpy(info3->base.LMSessKey.key,
196 server_info->lm_session_key.data,
197 MIN(sizeof(info3->base.LMSessKey.key),
198 server_info->lm_session_key.length));
199 if (pipe_session_key) {
200 arcfour_crypt(info3->base.LMSessKey.key,
201 pipe_session_key, 8);
202 }
203 }
204
205 sam6->base = info3->base;
206
207 sam6->sidcount = 0;
208 sam6->sids = NULL;
209
210 sam6->dns_domainname.string = talloc_strdup(sam6, dominfo->dns_domain);
211 if (sam6->dns_domainname.string == NULL) {
212 return NT_STATUS_NO_MEMORY;
213 }
214
215 sam6->principle.string = talloc_asprintf(sam6, "%s@%s",
216 sam6->base.account_name.string,
217 sam6->dns_domainname.string);
218 if (sam6->principle.string == NULL) {
219 return NT_STATUS_NO_MEMORY;
220 }
221
222 return NT_STATUS_OK;
223}
224
225static NTSTATUS append_netr_SidAttr(TALLOC_CTX *mem_ctx,
226 struct netr_SidAttr **sids,
227 uint32_t *count,
228 const struct dom_sid2 *asid,
229 uint32_t attributes)
230{
231 uint32_t t = *count;
232
233 *sids = talloc_realloc(mem_ctx, *sids, struct netr_SidAttr, t + 1);
234 if (*sids == NULL) {
235 return NT_STATUS_NO_MEMORY;
236 }
237 (*sids)[t].sid = dom_sid_dup(*sids, asid);
238 if ((*sids)[t].sid == NULL) {
239 return NT_STATUS_NO_MEMORY;
240 }
241 (*sids)[t].attributes = attributes;
242 *count = t + 1;
243
244 return NT_STATUS_OK;
245}
246
247/* Fills the samr_RidWithAttributeArray with the provided sids.
248 * If it happens that we have additional groups that do not belong
249 * to the domain, add their sids as extra sids */
250static NTSTATUS group_sids_to_info3(struct netr_SamInfo3 *info3,
251 const struct dom_sid *sids,
252 size_t num_sids)
253{
254 uint32_t attributes = SE_GROUP_MANDATORY |
255 SE_GROUP_ENABLED_BY_DEFAULT |
256 SE_GROUP_ENABLED;
257 struct samr_RidWithAttributeArray *groups;
258 struct dom_sid *domain_sid;
259 unsigned int i;
260 NTSTATUS status;
261 uint32_t rid;
262 bool ok;
263
264 domain_sid = info3->base.domain_sid;
265 groups = &info3->base.groups;
266
267 groups->rids = talloc_array(info3,
268 struct samr_RidWithAttribute, num_sids);
269 if (!groups->rids) {
270 return NT_STATUS_NO_MEMORY;
271 }
272
273 for (i = 0; i < num_sids; i++) {
274 ok = sid_peek_check_rid(domain_sid, &sids[i], &rid);
275 if (ok) {
276
277 /* if it is the primary gid, skip it, we
278 * obviously already have it */
279 if (info3->base.primary_gid == rid) continue;
280
281 /* store domain group rid */
282 groups->rids[i].rid = rid;
283 groups->rids[i].attributes = attributes;
284 groups->count++;
285 continue;
286 }
287
288 /* if this wasn't a domain sid, add it as extra sid */
289 status = append_netr_SidAttr(info3, &info3->sids,
290 &info3->sidcount,
291 &sids[i], attributes);
292 if (!NT_STATUS_IS_OK(status)) {
293 return status;
294 }
295 }
296
297 return NT_STATUS_OK;
298}
299
300#define RET_NOMEM(ptr) do { \
301 if (!ptr) { \
302 TALLOC_FREE(info3); \
303 return NT_STATUS_NO_MEMORY; \
304 } } while(0)
305
306NTSTATUS samu_to_SamInfo3(TALLOC_CTX *mem_ctx,
307 struct samu *samu,
308 const char *login_server,
309 struct netr_SamInfo3 **_info3,
310 struct extra_auth_info *extra)
311{
312 struct netr_SamInfo3 *info3;
313 const struct dom_sid *user_sid;
314 const struct dom_sid *group_sid;
315 struct dom_sid domain_sid;
316 struct dom_sid *group_sids;
317 uint32_t num_group_sids = 0;
318 const char *tmp;
319 gid_t *gids;
320 NTSTATUS status;
321 bool ok;
322
323 user_sid = pdb_get_user_sid(samu);
324 group_sid = pdb_get_group_sid(samu);
325
326 if (!user_sid || !group_sid) {
327 DEBUG(1, ("Sam account is missing sids!\n"));
328 return NT_STATUS_UNSUCCESSFUL;
329 }
330
331 info3 = talloc_zero(mem_ctx, struct netr_SamInfo3);
332 if (!info3) {
333 return NT_STATUS_NO_MEMORY;
334 }
335
336 ZERO_STRUCT(domain_sid);
337
338 /* check if this is a "Unix Users" domain user,
339 * we need to handle it in a special way if that's the case */
340 if (sid_check_is_in_unix_users(user_sid)) {
341 /* in info3 you can only set rids for the user and the
342 * primary group, and the domain sid must be that of
343 * the sam domain.
344 *
345 * Store a completely bogus value here.
346 * The real SID is stored in the extra sids.
347 * Other code will know to look there if (-1) is found
348 */
349 info3->base.rid = (uint32_t)(-1);
350 sid_copy(&extra->user_sid, user_sid);
351
352 DEBUG(10, ("Unix User found in struct samu. Rid marked as "
353 "special and sid (%s) saved as extra sid\n",
354 sid_string_dbg(user_sid)));
355 } else {
356 sid_copy(&domain_sid, user_sid);
357 sid_split_rid(&domain_sid, &info3->base.rid);
358 }
359
360 if (is_null_sid(&domain_sid)) {
361 sid_copy(&domain_sid, get_global_sam_sid());
362 }
363
364 /* check if this is a "Unix Groups" domain group,
365 * if so we need special handling */
366 if (sid_check_is_in_unix_groups(group_sid)) {
367 /* in info3 you can only set rids for the user and the
368 * primary group, and the domain sid must be that of
369 * the sam domain.
370 *
371 * Store a completely bogus value here.
372 * The real SID is stored in the extra sids.
373 * Other code will know to look there if (-1) is found
374 */
375 info3->base.primary_gid = (uint32_t)(-1);
376 sid_copy(&extra->pgid_sid, group_sid);
377
378 DEBUG(10, ("Unix Group found in struct samu. Rid marked as "
379 "special and sid (%s) saved as extra sid\n",
380 sid_string_dbg(group_sid)));
381
382 } else {
383 ok = sid_peek_check_rid(&domain_sid, group_sid,
384 &info3->base.primary_gid);
385 if (!ok) {
386 DEBUG(1, ("The primary group domain sid(%s) does not "
387 "match the domain sid(%s) for %s(%s)\n",
388 sid_string_dbg(group_sid),
389 sid_string_dbg(&domain_sid),
390 pdb_get_username(samu),
391 sid_string_dbg(user_sid)));
392 TALLOC_FREE(info3);
393 return NT_STATUS_UNSUCCESSFUL;
394 }
395 }
396
397 unix_to_nt_time(&info3->base.last_logon, pdb_get_logon_time(samu));
398 unix_to_nt_time(&info3->base.last_logoff, get_time_t_max());
399 unix_to_nt_time(&info3->base.acct_expiry, get_time_t_max());
400 unix_to_nt_time(&info3->base.last_password_change,
401 pdb_get_pass_last_set_time(samu));
402 unix_to_nt_time(&info3->base.allow_password_change,
403 pdb_get_pass_can_change_time(samu));
404 unix_to_nt_time(&info3->base.force_password_change,
405 pdb_get_pass_must_change_time(samu));
406
407 tmp = pdb_get_username(samu);
408 if (tmp) {
409 info3->base.account_name.string = talloc_strdup(info3, tmp);
410 RET_NOMEM(info3->base.account_name.string);
411 }
412 tmp = pdb_get_fullname(samu);
413 if (tmp) {
414 info3->base.full_name.string = talloc_strdup(info3, tmp);
415 RET_NOMEM(info3->base.full_name.string);
416 }
417 tmp = pdb_get_logon_script(samu);
418 if (tmp) {
419 info3->base.logon_script.string = talloc_strdup(info3, tmp);
420 RET_NOMEM(info3->base.logon_script.string);
421 }
422 tmp = pdb_get_profile_path(samu);
423 if (tmp) {
424 info3->base.profile_path.string = talloc_strdup(info3, tmp);
425 RET_NOMEM(info3->base.profile_path.string);
426 }
427 tmp = pdb_get_homedir(samu);
428 if (tmp) {
429 info3->base.home_directory.string = talloc_strdup(info3, tmp);
430 RET_NOMEM(info3->base.home_directory.string);
431 }
432 tmp = pdb_get_dir_drive(samu);
433 if (tmp) {
434 info3->base.home_drive.string = talloc_strdup(info3, tmp);
435 RET_NOMEM(info3->base.home_drive.string);
436 }
437
438 info3->base.logon_count = pdb_get_logon_count(samu);
439 info3->base.bad_password_count = pdb_get_bad_password_count(samu);
440
441 status = pdb_enum_group_memberships(mem_ctx, samu,
442 &group_sids, &gids,
443 &num_group_sids);
444 if (!NT_STATUS_IS_OK(status)) {
445 DEBUG(1, ("Failed to get groups from sam account.\n"));
446 TALLOC_FREE(info3);
447 return status;
448 }
449
450 if (num_group_sids) {
451 status = group_sids_to_info3(info3, group_sids, num_group_sids);
452 if (!NT_STATUS_IS_OK(status)) {
453 TALLOC_FREE(info3);
454 return status;
455 }
456 }
457
458 /* We don't need sids and gids after the conversion */
459 TALLOC_FREE(group_sids);
460 TALLOC_FREE(gids);
461 num_group_sids = 0;
462
463 /* FIXME: should we add other flags ? */
464 info3->base.user_flags = NETLOGON_EXTRA_SIDS;
465
466 if (login_server) {
467 info3->base.logon_server.string = talloc_strdup(info3, login_server);
468 RET_NOMEM(info3->base.logon_server.string);
469 }
470
471 info3->base.domain.string = talloc_strdup(info3,
472 pdb_get_domain(samu));
473 RET_NOMEM(info3->base.domain.string);
474
475 info3->base.domain_sid = dom_sid_dup(info3, &domain_sid);
476 RET_NOMEM(info3->base.domain_sid);
477
478 info3->base.acct_flags = pdb_get_acct_ctrl(samu);
479
480 *_info3 = info3;
481 return NT_STATUS_OK;
482}
483
484#undef RET_NOMEM
485
486#define RET_NOMEM(ptr) do { \
487 if (!ptr) { \
488 TALLOC_FREE(info3); \
489 return NULL; \
490 } } while(0)
491
492struct netr_SamInfo3 *copy_netr_SamInfo3(TALLOC_CTX *mem_ctx,
493 struct netr_SamInfo3 *orig)
494{
495 struct netr_SamInfo3 *info3;
496 unsigned int i;
497 NTSTATUS status;
498
499 info3 = talloc_zero(mem_ctx, struct netr_SamInfo3);
500 if (!info3) return NULL;
501
502 status = copy_netr_SamBaseInfo(info3, &orig->base, &info3->base);
503 if (!NT_STATUS_IS_OK(status)) {
504 TALLOC_FREE(info3);
505 return NULL;
506 }
507
508 if (orig->sidcount) {
509 info3->sidcount = orig->sidcount;
510 info3->sids = talloc_array(info3, struct netr_SidAttr,
511 orig->sidcount);
512 RET_NOMEM(info3->sids);
513 for (i = 0; i < orig->sidcount; i++) {
514 info3->sids[i].sid = dom_sid_dup(info3->sids,
515 orig->sids[i].sid);
516 RET_NOMEM(info3->sids[i].sid);
517 info3->sids[i].attributes =
518 orig->sids[i].attributes;
519 }
520 }
521
522 return info3;
523}
524
525static NTSTATUS wbcsids_to_samr_RidWithAttributeArray(
526 TALLOC_CTX *mem_ctx,
527 struct samr_RidWithAttributeArray *groups,
528 const struct dom_sid *domain_sid,
529 const struct wbcSidWithAttr *sids,
530 size_t num_sids)
531{
532 unsigned int i;
533 bool ok;
534
535 groups->rids = talloc_array(mem_ctx,
536 struct samr_RidWithAttribute, num_sids);
537 if (!groups->rids) {
538 return NT_STATUS_NO_MEMORY;
539 }
540
541 /* a wbcDomainSid is the same as a dom_sid */
542 for (i = 0; i < num_sids; i++) {
543 ok = sid_peek_check_rid(domain_sid,
544 (const struct dom_sid *)&sids[i].sid,
545 &groups->rids[i].rid);
546 if (!ok) continue;
547
548 groups->rids[i].attributes = SE_GROUP_MANDATORY |
549 SE_GROUP_ENABLED_BY_DEFAULT |
550 SE_GROUP_ENABLED;
551 groups->count++;
552 }
553
554 return NT_STATUS_OK;
555}
556
557struct netr_SamInfo3 *wbcAuthUserInfo_to_netr_SamInfo3(TALLOC_CTX *mem_ctx,
558 const struct wbcAuthUserInfo *info)
559{
560 struct netr_SamInfo3 *info3;
561 struct dom_sid user_sid;
562 struct dom_sid group_sid;
563 struct dom_sid domain_sid;
564 NTSTATUS status;
565 bool ok;
566
567 memcpy(&user_sid, &info->sids[0].sid, sizeof(user_sid));
568 memcpy(&group_sid, &info->sids[1].sid, sizeof(group_sid));
569
570 info3 = talloc_zero(mem_ctx, struct netr_SamInfo3);
571 if (!info3) return NULL;
572
573 info3->base.last_logon = info->logon_time;
574 info3->base.last_logoff = info->logoff_time;
575 info3->base.acct_expiry = info->kickoff_time;
576 unix_to_nt_time(&info3->base.last_password_change, info->pass_last_set_time);
577 unix_to_nt_time(&info3->base.allow_password_change,
578 info->pass_can_change_time);
579 unix_to_nt_time(&info3->base.force_password_change,
580 info->pass_must_change_time);
581
582 if (info->account_name) {
583 info3->base.account_name.string =
584 talloc_strdup(info3, info->account_name);
585 RET_NOMEM(info3->base.account_name.string);
586 }
587 if (info->full_name) {
588 info3->base.full_name.string =
589 talloc_strdup(info3, info->full_name);
590 RET_NOMEM(info3->base.full_name.string);
591 }
592 if (info->logon_script) {
593 info3->base.logon_script.string =
594 talloc_strdup(info3, info->logon_script);
595 RET_NOMEM(info3->base.logon_script.string);
596 }
597 if (info->profile_path) {
598 info3->base.profile_path.string =
599 talloc_strdup(info3, info->profile_path);
600 RET_NOMEM(info3->base.profile_path.string);
601 }
602 if (info->home_directory) {
603 info3->base.home_directory.string =
604 talloc_strdup(info3, info->home_directory);
605 RET_NOMEM(info3->base.home_directory.string);
606 }
607 if (info->home_drive) {
608 info3->base.home_drive.string =
609 talloc_strdup(info3, info->home_drive);
610 RET_NOMEM(info3->base.home_drive.string);
611 }
612
613 info3->base.logon_count = info->logon_count;
614 info3->base.bad_password_count = info->bad_password_count;
615
616 sid_copy(&domain_sid, &user_sid);
617 sid_split_rid(&domain_sid, &info3->base.rid);
618
619 ok = sid_peek_check_rid(&domain_sid, &group_sid,
620 &info3->base.primary_gid);
621 if (!ok) {
622 DEBUG(1, ("The primary group sid domain does not"
623 "match user sid domain for user: %s\n",
624 info->account_name));
625 TALLOC_FREE(info3);
626 return NULL;
627 }
628
629 status = wbcsids_to_samr_RidWithAttributeArray(info3,
630 &info3->base.groups,
631 &domain_sid,
632 &info->sids[1],
633 info->num_sids - 1);
634 if (!NT_STATUS_IS_OK(status)) {
635 TALLOC_FREE(info3);
636 return NULL;
637 }
638
639 info3->base.user_flags = info->user_flags;
640 memcpy(info3->base.key.key, info->user_session_key, 16);
641
642 if (info->logon_server) {
643 info3->base.logon_server.string =
644 talloc_strdup(info3, info->logon_server);
645 RET_NOMEM(info3->base.logon_server.string);
646 }
647 if (info->domain_name) {
648 info3->base.domain.string =
649 talloc_strdup(info3, info->domain_name);
650 RET_NOMEM(info3->base.domain.string);
651 }
652
653 info3->base.domain_sid = dom_sid_dup(info3, &domain_sid);
654 RET_NOMEM(info3->base.domain_sid);
655
656 memcpy(info3->base.LMSessKey.key, info->lm_session_key, 8);
657 info3->base.acct_flags = info->acct_flags;
658
659 return info3;
660}
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