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auth: Explain why GSS_KRB5_CRED_NO_CI_FLAGS_X is needed
[Samba.git] / source3 / winbindd / winbindd_pam.c
bloba274d4f8b04684b9ac0a88c0ea8a16d69c79a1d2
1 /*
2 Unix SMB/CIFS implementation.
3
4 Winbind daemon - pam auth funcions
5
6 Copyright (C) Andrew Tridgell 2000
7 Copyright (C) Tim Potter 2001
8 Copyright (C) Andrew Bartlett 2001-2002
9 Copyright (C) Guenther Deschner 2005
10
11 This program is free software; you can redistribute it and/or modify
12 it under the terms of the GNU General Public License as published by
13 the Free Software Foundation; either version 3 of the License, or
14 (at your option) any later version.
15
16 This program is distributed in the hope that it will be useful,
17 but WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 GNU General Public License for more details.
20
21 You should have received a copy of the GNU General Public License
22 along with this program. If not, see <http://www.gnu.org/licenses/>.
23 */
24
25 #include "includes.h"
26 #include "winbindd.h"
27 #include "../libcli/auth/libcli_auth.h"
28 #include "../librpc/gen_ndr/ndr_samr_c.h"
29 #include "rpc_client/cli_pipe.h"
30 #include "rpc_client/cli_samr.h"
31 #include "../librpc/gen_ndr/ndr_netlogon.h"
32 #include "rpc_client/cli_netlogon.h"
33 #include "smb_krb5.h"
34 #include "../lib/crypto/arcfour.h"
35 #include "../libcli/security/security.h"
36 #include "ads.h"
37 #include "../librpc/gen_ndr/krb5pac.h"
38 #include "passdb/machine_sid.h"
39 #include "auth.h"
40 #include "../lib/tsocket/tsocket.h"
41 #include "auth/kerberos/pac_utils.h"
42 #include "auth/gensec/gensec.h"
43 #include "librpc/crypto/gse_krb5.h"
44 #include "lib/afs/afs_funcs.h"
45
46 #undef DBGC_CLASS
47 #define DBGC_CLASS DBGC_WINBIND
48
49 #define LOGON_KRB5_FAIL_CLOCK_SKEW 0x02000000
50
51 static NTSTATUS append_info3_as_txt(TALLOC_CTX *mem_ctx,
52 struct winbindd_response *resp,
53 struct netr_SamInfo3 *info3)
54 {
55 char *ex;
56 uint32_t i;
57
58 resp->data.auth.info3.logon_time =
59 nt_time_to_unix(info3->base.logon_time);
60 resp->data.auth.info3.logoff_time =
61 nt_time_to_unix(info3->base.logoff_time);
62 resp->data.auth.info3.kickoff_time =
63 nt_time_to_unix(info3->base.kickoff_time);
64 resp->data.auth.info3.pass_last_set_time =
65 nt_time_to_unix(info3->base.last_password_change);
66 resp->data.auth.info3.pass_can_change_time =
67 nt_time_to_unix(info3->base.allow_password_change);
68 resp->data.auth.info3.pass_must_change_time =
69 nt_time_to_unix(info3->base.force_password_change);
70
71 resp->data.auth.info3.logon_count = info3->base.logon_count;
72 resp->data.auth.info3.bad_pw_count = info3->base.bad_password_count;
73
74 resp->data.auth.info3.user_rid = info3->base.rid;
75 resp->data.auth.info3.group_rid = info3->base.primary_gid;
76 sid_to_fstring(resp->data.auth.info3.dom_sid, info3->base.domain_sid);
77
78 resp->data.auth.info3.num_groups = info3->base.groups.count;
79 resp->data.auth.info3.user_flgs = info3->base.user_flags;
80
81 resp->data.auth.info3.acct_flags = info3->base.acct_flags;
82 resp->data.auth.info3.num_other_sids = info3->sidcount;
83
84 fstrcpy(resp->data.auth.info3.user_name,
85 info3->base.account_name.string);
86 fstrcpy(resp->data.auth.info3.full_name,
87 info3->base.full_name.string);
88 fstrcpy(resp->data.auth.info3.logon_script,
89 info3->base.logon_script.string);
90 fstrcpy(resp->data.auth.info3.profile_path,
91 info3->base.profile_path.string);
92 fstrcpy(resp->data.auth.info3.home_dir,
93 info3->base.home_directory.string);
94 fstrcpy(resp->data.auth.info3.dir_drive,
95 info3->base.home_drive.string);
96
97 fstrcpy(resp->data.auth.info3.logon_srv,
98 info3->base.logon_server.string);
99 fstrcpy(resp->data.auth.info3.logon_dom,
100 info3->base.logon_domain.string);
101
102 ex = talloc_strdup(mem_ctx, "");
103 NT_STATUS_HAVE_NO_MEMORY(ex);
104
105 for (i=0; i < info3->base.groups.count; i++) {
106 ex = talloc_asprintf_append_buffer(ex, "0x%08X:0x%08X\n",
107 info3->base.groups.rids[i].rid,
108 info3->base.groups.rids[i].attributes);
109 NT_STATUS_HAVE_NO_MEMORY(ex);
110 }
111
112 for (i=0; i < info3->sidcount; i++) {
113 char *sid;
114
115 sid = dom_sid_string(mem_ctx, info3->sids[i].sid);
116 NT_STATUS_HAVE_NO_MEMORY(sid);
117
118 ex = talloc_asprintf_append_buffer(ex, "%s:0x%08X\n",
119 sid,
120 info3->sids[i].attributes);
121 NT_STATUS_HAVE_NO_MEMORY(ex);
122
123 talloc_free(sid);
124 }
125
126 resp->extra_data.data = ex;
127 resp->length += talloc_get_size(ex);
128
129 return NT_STATUS_OK;
130 }
131
132 static NTSTATUS append_info3_as_ndr(TALLOC_CTX *mem_ctx,
133 struct winbindd_response *resp,
134 struct netr_SamInfo3 *info3)
135 {
136 DATA_BLOB blob;
137 enum ndr_err_code ndr_err;
138
139 ndr_err = ndr_push_struct_blob(&blob, mem_ctx, info3,
140 (ndr_push_flags_fn_t)ndr_push_netr_SamInfo3);
141 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
142 DEBUG(0,("append_info3_as_ndr: failed to append\n"));
143 return ndr_map_error2ntstatus(ndr_err);
144 }
145
146 resp->extra_data.data = blob.data;
147 resp->length += blob.length;
148
149 return NT_STATUS_OK;
150 }
151
152 static NTSTATUS append_unix_username(TALLOC_CTX *mem_ctx,
153 struct winbindd_response *resp,
154 const struct netr_SamInfo3 *info3,
155 const char *name_domain,
156 const char *name_user)
157 {
158 /* We've been asked to return the unix username, per
159 'winbind use default domain' settings and the like */
160
161 const char *nt_username, *nt_domain;
162
163 nt_domain = talloc_strdup(mem_ctx, info3->base.logon_domain.string);
164 if (!nt_domain) {
165 /* If the server didn't give us one, just use the one
166 * we sent them */
167 nt_domain = name_domain;
168 }
169
170 nt_username = talloc_strdup(mem_ctx, info3->base.account_name.string);
171 if (!nt_username) {
172 /* If the server didn't give us one, just use the one
173 * we sent them */
174 nt_username = name_user;
175 }
176
177 fill_domain_username(resp->data.auth.unix_username,
178 nt_domain, nt_username, true);
179
180 DEBUG(5, ("Setting unix username to [%s]\n",
181 resp->data.auth.unix_username));
182
183 return NT_STATUS_OK;
184 }
185
186 static NTSTATUS append_afs_token(TALLOC_CTX *mem_ctx,
187 struct winbindd_response *resp,
188 const struct netr_SamInfo3 *info3,
189 const char *name_domain,
190 const char *name_user)
191 {
192 char *afsname = NULL;
193 char *cell;
194 char *token;
195
196 afsname = talloc_strdup(mem_ctx, lp_afs_username_map());
197 if (afsname == NULL) {
198 return NT_STATUS_NO_MEMORY;
199 }
200
201 afsname = talloc_string_sub(mem_ctx,
202 lp_afs_username_map(),
203 "%D", name_domain);
204 afsname = talloc_string_sub(mem_ctx, afsname,
205 "%u", name_user);
206 afsname = talloc_string_sub(mem_ctx, afsname,
207 "%U", name_user);
208
209 {
210 struct dom_sid user_sid;
211 fstring sidstr;
212
213 sid_compose(&user_sid, info3->base.domain_sid,
214 info3->base.rid);
215 sid_to_fstring(sidstr, &user_sid);
216 afsname = talloc_string_sub(mem_ctx, afsname,
217 "%s", sidstr);
218 }
219
220 if (afsname == NULL) {
221 return NT_STATUS_NO_MEMORY;
222 }
223
224 if (!strlower_m(afsname)) {
225 return NT_STATUS_INVALID_PARAMETER;
226 }
227
228 DEBUG(10, ("Generating token for user %s\n", afsname));
229
230 cell = strchr(afsname, '@');
231
232 if (cell == NULL) {
233 return NT_STATUS_NO_MEMORY;
234 }
235
236 *cell = '\0';
237 cell += 1;
238
239 token = afs_createtoken_str(afsname, cell);
240 if (token == NULL) {
241 return NT_STATUS_OK;
242 }
243 resp->extra_data.data = talloc_strdup(mem_ctx, token);
244 if (resp->extra_data.data == NULL) {
245 return NT_STATUS_NO_MEMORY;
246 }
247 resp->length += strlen((const char *)resp->extra_data.data)+1;
248
249 return NT_STATUS_OK;
250 }
251
252 static NTSTATUS check_info3_in_group(struct netr_SamInfo3 *info3,
253 const char *group_sid)
254 /**
255 * Check whether a user belongs to a group or list of groups.
256 *
257 * @param mem_ctx talloc memory context.
258 * @param info3 user information, including group membership info.
259 * @param group_sid One or more groups , separated by commas.
260 *
261 * @return NT_STATUS_OK on success,
262 * NT_STATUS_LOGON_FAILURE if the user does not belong,
263 * or other NT_STATUS_IS_ERR(status) for other kinds of failure.
264 */
265 {
266 struct dom_sid *require_membership_of_sid;
267 uint32_t num_require_membership_of_sid;
268 char *req_sid;
269 const char *p;
270 struct dom_sid sid;
271 size_t i;
272 struct security_token *token;
273 TALLOC_CTX *frame = talloc_stackframe();
274 NTSTATUS status;
275
276 /* Parse the 'required group' SID */
277
278 if (!group_sid || !group_sid[0]) {
279 /* NO sid supplied, all users may access */
280 TALLOC_FREE(frame);
281 return NT_STATUS_OK;
282 }
283
284 token = talloc_zero(talloc_tos(), struct security_token);
285 if (token == NULL) {
286 DEBUG(0, ("talloc failed\n"));
287 TALLOC_FREE(frame);
288 return NT_STATUS_NO_MEMORY;
289 }
290
291 num_require_membership_of_sid = 0;
292 require_membership_of_sid = NULL;
293
294 p = group_sid;
295
296 while (next_token_talloc(talloc_tos(), &p, &req_sid, ",")) {
297 if (!string_to_sid(&sid, req_sid)) {
298 DEBUG(0, ("check_info3_in_group: could not parse %s "
299 "as a SID!", req_sid));
300 TALLOC_FREE(frame);
301 return NT_STATUS_INVALID_PARAMETER;
302 }
303
304 status = add_sid_to_array(talloc_tos(), &sid,
305 &require_membership_of_sid,
306 &num_require_membership_of_sid);
307 if (!NT_STATUS_IS_OK(status)) {
308 DEBUG(0, ("add_sid_to_array failed\n"));
309 TALLOC_FREE(frame);
310 return status;
311 }
312 }
313
314 status = sid_array_from_info3(talloc_tos(), info3,
315 &token->sids,
316 &token->num_sids,
317 true);
318 if (!NT_STATUS_IS_OK(status)) {
319 TALLOC_FREE(frame);
320 return status;
321 }
322
323 if (!NT_STATUS_IS_OK(status = add_aliases(get_global_sam_sid(),
324 token))
325 || !NT_STATUS_IS_OK(status = add_aliases(&global_sid_Builtin,
326 token))) {
327 DEBUG(3, ("could not add aliases: %s\n",
328 nt_errstr(status)));
329 TALLOC_FREE(frame);
330 return status;
331 }
332
333 security_token_debug(DBGC_CLASS, 10, token);
334
335 for (i=0; i<num_require_membership_of_sid; i++) {
336 DEBUG(10, ("Checking SID %s\n", sid_string_dbg(
337 &require_membership_of_sid[i])));
338 if (nt_token_check_sid(&require_membership_of_sid[i],
339 token)) {
340 DEBUG(10, ("Access ok\n"));
341 TALLOC_FREE(frame);
342 return NT_STATUS_OK;
343 }
344 }
345
346 /* Do not distinguish this error from a wrong username/pw */
347
348 TALLOC_FREE(frame);
349 return NT_STATUS_LOGON_FAILURE;
350 }
351
352 struct winbindd_domain *find_auth_domain(uint8_t flags,
353 const char *domain_name)
354 {
355 struct winbindd_domain *domain;
356
357 if (IS_DC) {
358 domain = find_domain_from_name_noinit(domain_name);
359 if (domain == NULL) {
360 DEBUG(3, ("Authentication for domain [%s] refused "
361 "as it is not a trusted domain\n",
362 domain_name));
363 }
364 return domain;
365 }
366
367 if (strequal(domain_name, get_global_sam_name())) {
368 return find_domain_from_name_noinit(domain_name);
369 }
370
371 /* we can auth against trusted domains */
372 if (flags & WBFLAG_PAM_CONTACT_TRUSTDOM) {
373 domain = find_domain_from_name_noinit(domain_name);
374 if (domain == NULL) {
375 DEBUG(3, ("Authentication for domain [%s] skipped "
376 "as it is not a trusted domain\n",
377 domain_name));
378 } else {
379 return domain;
380 }
381 }
382
383 return find_our_domain();
384 }
385
386 static void fill_in_password_policy(struct winbindd_response *r,
387 const struct samr_DomInfo1 *p)
388 {
389 r->data.auth.policy.min_length_password =
390 p->min_password_length;
391 r->data.auth.policy.password_history =
392 p->password_history_length;
393 r->data.auth.policy.password_properties =
394 p->password_properties;
395 r->data.auth.policy.expire =
396 nt_time_to_unix_abs((const NTTIME *)&(p->max_password_age));
397 r->data.auth.policy.min_passwordage =
398 nt_time_to_unix_abs((const NTTIME *)&(p->min_password_age));
399 }
400
401 static NTSTATUS fillup_password_policy(struct winbindd_domain *domain,
402 struct winbindd_response *response)
403 {
404 TALLOC_CTX *frame = talloc_stackframe();
405 struct winbindd_methods *methods;
406 NTSTATUS status;
407 struct samr_DomInfo1 password_policy;
408
409 if ( !winbindd_can_contact_domain( domain ) ) {
410 DEBUG(5,("fillup_password_policy: No inbound trust to "
411 "contact domain %s\n", domain->name));
412 status = NT_STATUS_NOT_SUPPORTED;
413 goto done;
414 }
415
416 methods = domain->methods;
417
418 status = methods->password_policy(domain, talloc_tos(), &password_policy);
419 if (NT_STATUS_IS_ERR(status)) {
420 goto done;
421 }
422
423 fill_in_password_policy(response, &password_policy);
424
425 done:
426 TALLOC_FREE(frame);
427 return NT_STATUS_OK;
428 }
429
430 static NTSTATUS get_max_bad_attempts_from_lockout_policy(struct winbindd_domain *domain,
431 TALLOC_CTX *mem_ctx,
432 uint16_t *lockout_threshold)
433 {
434 struct winbindd_methods *methods;
435 NTSTATUS status = NT_STATUS_UNSUCCESSFUL;
436 struct samr_DomInfo12 lockout_policy;
437
438 *lockout_threshold = 0;
439
440 methods = domain->methods;
441
442 status = methods->lockout_policy(domain, mem_ctx, &lockout_policy);
443 if (NT_STATUS_IS_ERR(status)) {
444 return status;
445 }
446
447 *lockout_threshold = lockout_policy.lockout_threshold;
448
449 return NT_STATUS_OK;
450 }
451
452 static NTSTATUS get_pwd_properties(struct winbindd_domain *domain,
453 TALLOC_CTX *mem_ctx,
454 uint32_t *password_properties)
455 {
456 struct winbindd_methods *methods;
457 NTSTATUS status = NT_STATUS_UNSUCCESSFUL;
458 struct samr_DomInfo1 password_policy;
459
460 *password_properties = 0;
461
462 methods = domain->methods;
463
464 status = methods->password_policy(domain, mem_ctx, &password_policy);
465 if (NT_STATUS_IS_ERR(status)) {
466 return status;
467 }
468
469 *password_properties = password_policy.password_properties;
470
471 return NT_STATUS_OK;
472 }
473
474 #ifdef HAVE_KRB5
475
476 static const char *generate_krb5_ccache(TALLOC_CTX *mem_ctx,
477 const char *type,
478 uid_t uid,
479 const char **user_ccache_file)
480 {
481 /* accept FILE and WRFILE as krb5_cc_type from the client and then
482 * build the full ccname string based on the user's uid here -
483 * Guenther*/
484
485 const char *gen_cc = NULL;
486
487 if (uid != -1) {
488 if (strequal(type, "FILE")) {
489 gen_cc = talloc_asprintf(
490 mem_ctx, "FILE:/tmp/krb5cc_%d", uid);
491 }
492 if (strequal(type, "WRFILE")) {
493 gen_cc = talloc_asprintf(
494 mem_ctx, "WRFILE:/tmp/krb5cc_%d", uid);
495 }
496 if (strequal(type, "KEYRING")) {
497 gen_cc = talloc_asprintf(
498 mem_ctx, "KEYRING:persistent:%d", uid);
499 }
500
501 if (strnequal(type, "FILE:/", 6) ||
502 strnequal(type, "WRFILE:/", 8) ||
503 strnequal(type, "DIR:/", 5)) {
504
505 /* we allow only one "%u" substitution */
506
507 char *p;
508
509 p = strchr(type, '%');
510 if (p != NULL) {
511
512 p++;
513
514 if (p != NULL && *p == 'u' && strchr(p, '%') == NULL) {
515 char uid_str[sizeof("18446744073709551615")];
516
517 snprintf(uid_str, sizeof(uid_str), "%u", uid);
518
519 gen_cc = talloc_string_sub2(mem_ctx,
520 type,
521 "%u",
522 uid_str,
523 /* remove_unsafe_characters */
524 false,
525 /* replace_once */
526 true,
527 /* allow_trailing_dollar */
528 false);
529 }
530 }
531 }
532 }
533
534 *user_ccache_file = gen_cc;
535
536 if (gen_cc == NULL) {
537 gen_cc = talloc_strdup(mem_ctx, "MEMORY:winbindd_pam_ccache");
538 }
539 if (gen_cc == NULL) {
540 DEBUG(0,("out of memory\n"));
541 return NULL;
542 }
543
544 DEBUG(10, ("using ccache: %s%s\n", gen_cc,
545 (*user_ccache_file == NULL) ? " (internal)":""));
546
547 return gen_cc;
548 }
549
550 #endif
551
552 uid_t get_uid_from_request(struct winbindd_request *request)
553 {
554 uid_t uid;
555
556 uid = request->data.auth.uid;
557
558 if (uid < 0) {
559 DEBUG(1,("invalid uid: '%u'\n", (unsigned int)uid));
560 return -1;
561 }
562 return uid;
563 }
564
565 /**********************************************************************
566 Authenticate a user with a clear text password using Kerberos and fill up
567 ccache if required
568 **********************************************************************/
569
570 static NTSTATUS winbindd_raw_kerberos_login(TALLOC_CTX *mem_ctx,
571 struct winbindd_domain *domain,
572 const char *user,
573 const char *pass,
574 const char *krb5_cc_type,
575 uid_t uid,
576 struct netr_SamInfo3 **info3,
577 fstring krb5ccname)
578 {
579 #ifdef HAVE_KRB5
580 NTSTATUS result = NT_STATUS_UNSUCCESSFUL;
581 krb5_error_code krb5_ret;
582 const char *cc = NULL;
583 const char *principal_s = NULL;
584 const char *service = NULL;
585 char *realm = NULL;
586 fstring name_domain, name_user;
587 time_t ticket_lifetime = 0;
588 time_t renewal_until = 0;
589 ADS_STRUCT *ads;
590 time_t time_offset = 0;
591 const char *user_ccache_file;
592 struct PAC_LOGON_INFO *logon_info = NULL;
593 struct PAC_DATA *pac_data = NULL;
594 struct PAC_DATA_CTR *pac_data_ctr = NULL;
595 const char *local_service;
596 int i;
597 struct netr_SamInfo3 *info3_copy = NULL;
598
599 *info3 = NULL;
600
601 if (domain->alt_name == NULL) {
602 return NT_STATUS_INVALID_PARAMETER;
603 }
604
605 /* 1st step:
606 * prepare a krb5_cc_cache string for the user */
607
608 if (uid == -1) {
609 DEBUG(0,("no valid uid\n"));
610 }
611
612 cc = generate_krb5_ccache(mem_ctx,
613 krb5_cc_type,
614 uid,
615 &user_ccache_file);
616 if (cc == NULL) {
617 return NT_STATUS_NO_MEMORY;
618 }
619
620
621 /* 2nd step:
622 * get kerberos properties */
623
624 if (domain->private_data) {
625 ads = (ADS_STRUCT *)domain->private_data;
626 time_offset = ads->auth.time_offset;
627 }
628
629
630 /* 3rd step:
631 * do kerberos auth and setup ccache as the user */
632
633 parse_domain_user(user, name_domain, name_user);
634
635 realm = talloc_strdup(mem_ctx, domain->alt_name);
636 if (realm == NULL) {
637 return NT_STATUS_NO_MEMORY;
638 }
639
640 if (!strupper_m(realm)) {
641 return NT_STATUS_INVALID_PARAMETER;
642 }
643
644 principal_s = talloc_asprintf(mem_ctx, "%s@%s", name_user, realm);
645 if (principal_s == NULL) {
646 return NT_STATUS_NO_MEMORY;
647 }
648
649 service = talloc_asprintf(mem_ctx, "%s/%s@%s", KRB5_TGS_NAME, realm, realm);
650 if (service == NULL) {
651 return NT_STATUS_NO_MEMORY;
652 }
653
654 local_service = talloc_asprintf(mem_ctx, "%s$@%s",
655 lp_netbios_name(), lp_realm());
656 if (local_service == NULL) {
657 return NT_STATUS_NO_MEMORY;
658 }
659
660
661 /* if this is a user ccache, we need to act as the user to let the krb5
662 * library handle the chown, etc. */
663
664 /************************ ENTERING NON-ROOT **********************/
665
666 if (user_ccache_file != NULL) {
667 set_effective_uid(uid);
668 DEBUG(10,("winbindd_raw_kerberos_login: uid is %d\n", uid));
669 }
670
671 result = kerberos_return_pac(mem_ctx,
672 principal_s,
673 pass,
674 time_offset,
675 &ticket_lifetime,
676 &renewal_until,
677 cc,
678 true,
679 true,
680 WINBINDD_PAM_AUTH_KRB5_RENEW_TIME,
681 NULL,
682 local_service,
683 &pac_data_ctr);
684 if (user_ccache_file != NULL) {
685 gain_root_privilege();
686 }
687
688 /************************ RETURNED TO ROOT **********************/
689
690 if (!NT_STATUS_IS_OK(result)) {
691 goto failed;
692 }
693
694 if (pac_data_ctr == NULL) {
695 goto failed;
696 }
697
698 pac_data = pac_data_ctr->pac_data;
699 if (pac_data == NULL) {
700 goto failed;
701 }
702
703 for (i=0; i < pac_data->num_buffers; i++) {
704
705 if (pac_data->buffers[i].type != PAC_TYPE_LOGON_INFO) {
706 continue;
707 }
708
709 logon_info = pac_data->buffers[i].info->logon_info.info;
710 if (!logon_info) {
711 return NT_STATUS_INVALID_PARAMETER;
712 }
713
714 break;
715 }
716
717 if (logon_info == NULL) {
718 DEBUG(10,("Missing logon_info in ticket of %s\n",
719 principal_s));
720 return NT_STATUS_INVALID_PARAMETER;
721 }
722
723 DEBUG(10,("winbindd_raw_kerberos_login: winbindd validated ticket of %s\n",
724 principal_s));
725
726 result = create_info3_from_pac_logon_info(mem_ctx, logon_info, &info3_copy);
727 if (!NT_STATUS_IS_OK(result)) {
728 goto failed;
729 }
730
731 /* if we had a user's ccache then return that string for the pam
732 * environment */
733
734 if (user_ccache_file != NULL) {
735
736 fstrcpy(krb5ccname, user_ccache_file);
737
738 result = add_ccache_to_list(principal_s,
739 cc,
740 service,
741 user,
742 pass,
743 realm,
744 uid,
745 time(NULL),
746 ticket_lifetime,
747 renewal_until,
748 false);
749
750 if (!NT_STATUS_IS_OK(result)) {
751 DEBUG(10,("winbindd_raw_kerberos_login: failed to add ccache to list: %s\n",
752 nt_errstr(result)));
753 }
754 } else {
755
756 /* need to delete the memory cred cache, it is not used anymore */
757
758 krb5_ret = ads_kdestroy(cc);
759 if (krb5_ret) {
760 DEBUG(3,("winbindd_raw_kerberos_login: "
761 "could not destroy krb5 credential cache: "
762 "%s\n", error_message(krb5_ret)));
763 }
764
765 }
766 *info3 = info3_copy;
767 return NT_STATUS_OK;
768
769 failed:
770 /*
771 * Do not delete an existing valid credential cache, if the user
772 * e.g. enters a wrong password
773 */
774 if ((strequal(krb5_cc_type, "FILE") || strequal(krb5_cc_type, "WRFILE"))
775 && user_ccache_file != NULL) {
776 return result;
777 }
778
779 /* we could have created a new credential cache with a valid tgt in it
780 * but we werent able to get or verify the service ticket for this
781 * local host and therefor didn't get the PAC, we need to remove that
782 * cache entirely now */
783
784 krb5_ret = ads_kdestroy(cc);
785 if (krb5_ret) {
786 DEBUG(3,("winbindd_raw_kerberos_login: "
787 "could not destroy krb5 credential cache: "
788 "%s\n", error_message(krb5_ret)));
789 }
790
791 if (!NT_STATUS_IS_OK(remove_ccache(user))) {
792 DEBUG(3,("winbindd_raw_kerberos_login: "
793 "could not remove ccache for user %s\n",
794 user));
795 }
796
797 return result;
798 #else
799 return NT_STATUS_NOT_SUPPORTED;
800 #endif /* HAVE_KRB5 */
801 }
802
803 /****************************************************************
804 ****************************************************************/
805
806 bool check_request_flags(uint32_t flags)
807 {
808 uint32_t flags_edata = WBFLAG_PAM_AFS_TOKEN |
809 WBFLAG_PAM_INFO3_TEXT |
810 WBFLAG_PAM_INFO3_NDR;
811
812 if ( ( (flags & flags_edata) == WBFLAG_PAM_AFS_TOKEN) ||
813 ( (flags & flags_edata) == WBFLAG_PAM_INFO3_NDR) ||
814 ( (flags & flags_edata) == WBFLAG_PAM_INFO3_TEXT)||
815 !(flags & flags_edata) ) {
816 return true;
817 }
818
819 DEBUG(1, ("check_request_flags: invalid request flags[0x%08X]\n",
820 flags));
821
822 return false;
823 }
824
825 /****************************************************************
826 ****************************************************************/
827
828 NTSTATUS append_auth_data(TALLOC_CTX *mem_ctx,
829 struct winbindd_response *resp,
830 uint32_t request_flags,
831 struct netr_SamInfo3 *info3,
832 const char *name_domain,
833 const char *name_user)
834 {
835 NTSTATUS result;
836
837 if (request_flags & WBFLAG_PAM_USER_SESSION_KEY) {
838 memcpy(resp->data.auth.user_session_key,
839 info3->base.key.key,
840 sizeof(resp->data.auth.user_session_key)
841 /* 16 */);
842 }
843
844 if (request_flags & WBFLAG_PAM_LMKEY) {
845 memcpy(resp->data.auth.first_8_lm_hash,
846 info3->base.LMSessKey.key,
847 sizeof(resp->data.auth.first_8_lm_hash)
848 /* 8 */);
849 }
850
851 if (request_flags & WBFLAG_PAM_UNIX_NAME) {
852 result = append_unix_username(mem_ctx, resp,
853 info3, name_domain, name_user);
854 if (!NT_STATUS_IS_OK(result)) {
855 DEBUG(10,("Failed to append Unix Username: %s\n",
856 nt_errstr(result)));
857 return result;
858 }
859 }
860
861 /* currently, anything from here on potentially overwrites extra_data. */
862
863 if (request_flags & WBFLAG_PAM_INFO3_NDR) {
864 result = append_info3_as_ndr(mem_ctx, resp, info3);
865 if (!NT_STATUS_IS_OK(result)) {
866 DEBUG(10,("Failed to append INFO3 (NDR): %s\n",
867 nt_errstr(result)));
868 return result;
869 }
870 }
871
872 if (request_flags & WBFLAG_PAM_INFO3_TEXT) {
873 result = append_info3_as_txt(mem_ctx, resp, info3);
874 if (!NT_STATUS_IS_OK(result)) {
875 DEBUG(10,("Failed to append INFO3 (TXT): %s\n",
876 nt_errstr(result)));
877 return result;
878 }
879 }
880
881 if (request_flags & WBFLAG_PAM_AFS_TOKEN) {
882 result = append_afs_token(mem_ctx, resp,
883 info3, name_domain, name_user);
884 if (!NT_STATUS_IS_OK(result)) {
885 DEBUG(10,("Failed to append AFS token: %s\n",
886 nt_errstr(result)));
887 return result;
888 }
889 }
890
891 return NT_STATUS_OK;
892 }
893
894 static NTSTATUS winbindd_dual_pam_auth_cached(struct winbindd_domain *domain,
895 struct winbindd_cli_state *state,
896 struct netr_SamInfo3 **info3)
897 {
898 NTSTATUS result = NT_STATUS_LOGON_FAILURE;
899 uint16_t max_allowed_bad_attempts;
900 fstring name_domain, name_user;
901 struct dom_sid sid;
902 enum lsa_SidType type;
903 uchar new_nt_pass[NT_HASH_LEN];
904 const uint8_t *cached_nt_pass;
905 const uint8_t *cached_salt;
906 struct netr_SamInfo3 *my_info3;
907 time_t kickoff_time, must_change_time;
908 bool password_good = false;
909 #ifdef HAVE_KRB5
910 struct winbindd_tdc_domain *tdc_domain = NULL;
911 #endif
912
913 *info3 = NULL;
914
915 ZERO_STRUCTP(info3);
916
917 DEBUG(10,("winbindd_dual_pam_auth_cached\n"));
918
919 /* Parse domain and username */
920
921 parse_domain_user(state->request->data.auth.user, name_domain, name_user);
922
923
924 if (!lookup_cached_name(name_domain,
925 name_user,
926 &sid,
927 &type)) {
928 DEBUG(10,("winbindd_dual_pam_auth_cached: no such user in the cache\n"));
929 return NT_STATUS_NO_SUCH_USER;
930 }
931
932 if (type != SID_NAME_USER) {
933 DEBUG(10,("winbindd_dual_pam_auth_cached: not a user (%s)\n", sid_type_lookup(type)));
934 return NT_STATUS_LOGON_FAILURE;
935 }
936
937 result = winbindd_get_creds(domain,
938 state->mem_ctx,
939 &sid,
940 &my_info3,
941 &cached_nt_pass,
942 &cached_salt);
943 if (!NT_STATUS_IS_OK(result)) {
944 DEBUG(10,("winbindd_dual_pam_auth_cached: failed to get creds: %s\n", nt_errstr(result)));
945 return result;
946 }
947
948 *info3 = my_info3;
949
950 E_md4hash(state->request->data.auth.pass, new_nt_pass);
951
952 dump_data_pw("new_nt_pass", new_nt_pass, NT_HASH_LEN);
953 dump_data_pw("cached_nt_pass", cached_nt_pass, NT_HASH_LEN);
954 if (cached_salt) {
955 dump_data_pw("cached_salt", cached_salt, NT_HASH_LEN);
956 }
957
958 if (cached_salt) {
959 /* In this case we didn't store the nt_hash itself,
960 but the MD5 combination of salt + nt_hash. */
961 uchar salted_hash[NT_HASH_LEN];
962 E_md5hash(cached_salt, new_nt_pass, salted_hash);
963
964 password_good = (memcmp(cached_nt_pass, salted_hash,
965 NT_HASH_LEN) == 0);
966 } else {
967 /* Old cached cred - direct store of nt_hash (bad bad bad !). */
968 password_good = (memcmp(cached_nt_pass, new_nt_pass,
969 NT_HASH_LEN) == 0);
970 }
971
972 if (password_good) {
973
974 /* User *DOES* know the password, update logon_time and reset
975 * bad_pw_count */
976
977 my_info3->base.user_flags |= NETLOGON_CACHED_ACCOUNT;
978
979 if (my_info3->base.acct_flags & ACB_AUTOLOCK) {
980 return NT_STATUS_ACCOUNT_LOCKED_OUT;
981 }
982
983 if (my_info3->base.acct_flags & ACB_DISABLED) {
984 return NT_STATUS_ACCOUNT_DISABLED;
985 }
986
987 if (my_info3->base.acct_flags & ACB_WSTRUST) {
988 return NT_STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT;
989 }
990
991 if (my_info3->base.acct_flags & ACB_SVRTRUST) {
992 return NT_STATUS_NOLOGON_SERVER_TRUST_ACCOUNT;
993 }
994
995 if (my_info3->base.acct_flags & ACB_DOMTRUST) {
996 return NT_STATUS_NOLOGON_INTERDOMAIN_TRUST_ACCOUNT;
997 }
998
999 if (!(my_info3->base.acct_flags & ACB_NORMAL)) {
1000 DEBUG(0,("winbindd_dual_pam_auth_cached: whats wrong with that one?: 0x%08x\n",
1001 my_info3->base.acct_flags));
1002 return NT_STATUS_LOGON_FAILURE;
1003 }
1004
1005 kickoff_time = nt_time_to_unix(my_info3->base.kickoff_time);
1006 if (kickoff_time != 0 && time(NULL) > kickoff_time) {
1007 return NT_STATUS_ACCOUNT_EXPIRED;
1008 }
1009
1010 must_change_time = nt_time_to_unix(my_info3->base.force_password_change);
1011 if (must_change_time != 0 && must_change_time < time(NULL)) {
1012 /* we allow grace logons when the password has expired */
1013 my_info3->base.user_flags |= NETLOGON_GRACE_LOGON;
1014 /* return NT_STATUS_PASSWORD_EXPIRED; */
1015 goto success;
1016 }
1017
1018 #ifdef HAVE_KRB5
1019 if ((state->request->flags & WBFLAG_PAM_KRB5) &&
1020 ((tdc_domain = wcache_tdc_fetch_domain(state->mem_ctx, name_domain)) != NULL) &&
1021 ((tdc_domain->trust_type & LSA_TRUST_TYPE_UPLEVEL) ||
1022 /* used to cope with the case winbindd starting without network. */
1023 !strequal(tdc_domain->domain_name, tdc_domain->dns_name))) {
1024
1025 uid_t uid = -1;
1026 const char *cc = NULL;
1027 char *realm = NULL;
1028 const char *principal_s = NULL;
1029 const char *service = NULL;
1030 const char *user_ccache_file;
1031
1032 if (domain->alt_name == NULL) {
1033 return NT_STATUS_INVALID_PARAMETER;
1034 }
1035
1036 uid = get_uid_from_request(state->request);
1037 if (uid == -1) {
1038 DEBUG(0,("winbindd_dual_pam_auth_cached: invalid uid\n"));
1039 return NT_STATUS_INVALID_PARAMETER;
1040 }
1041
1042 cc = generate_krb5_ccache(state->mem_ctx,
1043 state->request->data.auth.krb5_cc_type,
1044 state->request->data.auth.uid,
1045 &user_ccache_file);
1046 if (cc == NULL) {
1047 return NT_STATUS_NO_MEMORY;
1048 }
1049
1050 realm = talloc_strdup(state->mem_ctx, domain->alt_name);
1051 if (realm == NULL) {
1052 return NT_STATUS_NO_MEMORY;
1053 }
1054
1055 if (!strupper_m(realm)) {
1056 return NT_STATUS_INVALID_PARAMETER;
1057 }
1058
1059 principal_s = talloc_asprintf(state->mem_ctx, "%s@%s", name_user, realm);
1060 if (principal_s == NULL) {
1061 return NT_STATUS_NO_MEMORY;
1062 }
1063
1064 service = talloc_asprintf(state->mem_ctx, "%s/%s@%s", KRB5_TGS_NAME, realm, realm);
1065 if (service == NULL) {
1066 return NT_STATUS_NO_MEMORY;
1067 }
1068
1069 if (user_ccache_file != NULL) {
1070
1071 fstrcpy(state->response->data.auth.krb5ccname,
1072 user_ccache_file);
1073
1074 result = add_ccache_to_list(principal_s,
1075 cc,
1076 service,
1077 state->request->data.auth.user,
1078 state->request->data.auth.pass,
1079 realm,
1080 uid,
1081 time(NULL),
1082 time(NULL) + lp_winbind_cache_time(),
1083 time(NULL) + WINBINDD_PAM_AUTH_KRB5_RENEW_TIME,
1084 true);
1085
1086 if (!NT_STATUS_IS_OK(result)) {
1087 DEBUG(10,("winbindd_dual_pam_auth_cached: failed "
1088 "to add ccache to list: %s\n",
1089 nt_errstr(result)));
1090 }
1091 }
1092 }
1093 #endif /* HAVE_KRB5 */
1094 success:
1095 /* FIXME: we possibly should handle logon hours as well (does xp when
1096 * offline?) see auth/auth_sam.c:sam_account_ok for details */
1097
1098 unix_to_nt_time(&my_info3->base.logon_time, time(NULL));
1099 my_info3->base.bad_password_count = 0;
1100
1101 result = winbindd_update_creds_by_info3(domain,
1102 state->request->data.auth.user,
1103 state->request->data.auth.pass,
1104 my_info3);
1105 if (!NT_STATUS_IS_OK(result)) {
1106 DEBUG(1,("winbindd_dual_pam_auth_cached: failed to update creds: %s\n",
1107 nt_errstr(result)));
1108 return result;
1109 }
1110
1111 return NT_STATUS_OK;
1112
1113 }
1114
1115 /* User does *NOT* know the correct password, modify info3 accordingly, but only if online */
1116 if (domain->online == false) {
1117 goto failed;
1118 }
1119
1120 /* failure of this is not critical */
1121 result = get_max_bad_attempts_from_lockout_policy(domain, state->mem_ctx, &max_allowed_bad_attempts);
1122 if (!NT_STATUS_IS_OK(result)) {
1123 DEBUG(10,("winbindd_dual_pam_auth_cached: failed to get max_allowed_bad_attempts. "
1124 "Won't be able to honour account lockout policies\n"));
1125 }
1126
1127 /* increase counter */
1128 my_info3->base.bad_password_count++;
1129
1130 if (max_allowed_bad_attempts == 0) {
1131 goto failed;
1132 }
1133
1134 /* lockout user */
1135 if (my_info3->base.bad_password_count >= max_allowed_bad_attempts) {
1136
1137 uint32_t password_properties;
1138
1139 result = get_pwd_properties(domain, state->mem_ctx, &password_properties);
1140 if (!NT_STATUS_IS_OK(result)) {
1141 DEBUG(10,("winbindd_dual_pam_auth_cached: failed to get password properties.\n"));
1142 }
1143
1144 if ((my_info3->base.rid != DOMAIN_RID_ADMINISTRATOR) ||
1145 (password_properties & DOMAIN_PASSWORD_LOCKOUT_ADMINS)) {
1146 my_info3->base.acct_flags |= ACB_AUTOLOCK;
1147 }
1148 }
1149
1150 failed:
1151 result = winbindd_update_creds_by_info3(domain,
1152 state->request->data.auth.user,
1153 NULL,
1154 my_info3);
1155
1156 if (!NT_STATUS_IS_OK(result)) {
1157 DEBUG(0,("winbindd_dual_pam_auth_cached: failed to update creds %s\n",
1158 nt_errstr(result)));
1159 }
1160
1161 return NT_STATUS_LOGON_FAILURE;
1162 }
1163
1164 static NTSTATUS winbindd_dual_pam_auth_kerberos(struct winbindd_domain *domain,
1165 struct winbindd_cli_state *state,
1166 struct netr_SamInfo3 **info3)
1167 {
1168 struct winbindd_domain *contact_domain;
1169 fstring name_domain, name_user;
1170 NTSTATUS result;
1171
1172 DEBUG(10,("winbindd_dual_pam_auth_kerberos\n"));
1173
1174 /* Parse domain and username */
1175
1176 parse_domain_user(state->request->data.auth.user, name_domain, name_user);
1177
1178 /* what domain should we contact? */
1179
1180 if ( IS_DC ) {
1181 if (!(contact_domain = find_domain_from_name(name_domain))) {
1182 DEBUG(3, ("Authentication for domain for [%s] -> [%s]\\[%s] failed as %s is not a trusted domain\n",
1183 state->request->data.auth.user, name_domain, name_user, name_domain));
1184 result = NT_STATUS_NO_SUCH_USER;
1185 goto done;
1186 }
1187
1188 } else {
1189 if (is_myname(name_domain)) {
1190 DEBUG(3, ("Authentication for domain %s (local domain to this server) not supported at this stage\n", name_domain));
1191 result = NT_STATUS_NO_SUCH_USER;
1192 goto done;
1193 }
1194
1195 contact_domain = find_domain_from_name(name_domain);
1196 if (contact_domain == NULL) {
1197 DEBUG(3, ("Authentication for domain for [%s] -> [%s]\\[%s] failed as %s is not a trusted domain\n",
1198 state->request->data.auth.user, name_domain, name_user, name_domain));
1199
1200 result = NT_STATUS_NO_SUCH_USER;
1201 goto done;
1202 }
1203 }
1204
1205 if (contact_domain->initialized &&
1206 contact_domain->active_directory) {
1207 goto try_login;
1208 }
1209
1210 if (!contact_domain->initialized) {
1211 init_dc_connection(contact_domain, false);
1212 }
1213
1214 if (!contact_domain->active_directory) {
1215 DEBUG(3,("krb5 auth requested but domain is not Active Directory\n"));
1216 return NT_STATUS_INVALID_LOGON_TYPE;
1217 }
1218 try_login:
1219 result = winbindd_raw_kerberos_login(
1220 state->mem_ctx, contact_domain,
1221 state->request->data.auth.user,
1222 state->request->data.auth.pass,
1223 state->request->data.auth.krb5_cc_type,
1224 get_uid_from_request(state->request),
1225 info3, state->response->data.auth.krb5ccname);
1226 done:
1227 return result;
1228 }
1229
1230 static NTSTATUS winbindd_dual_auth_passdb(TALLOC_CTX *mem_ctx,
1231 uint32_t logon_parameters,
1232 const char *domain, const char *user,
1233 const DATA_BLOB *challenge,
1234 const DATA_BLOB *lm_resp,
1235 const DATA_BLOB *nt_resp,
1236 struct netr_SamInfo3 **pinfo3)
1237 {
1238 struct auth_context *auth_context;
1239 struct auth_serversupplied_info *server_info;
1240 struct auth_usersupplied_info *user_info = NULL;
1241 struct tsocket_address *local;
1242 struct netr_SamInfo3 *info3;
1243 NTSTATUS status;
1244 int rc;
1245 TALLOC_CTX *frame = talloc_stackframe();
1246
1247 rc = tsocket_address_inet_from_strings(frame,
1248 "ip",
1249 "127.0.0.1",
1250 0,
1251 &local);
1252 if (rc < 0) {
1253 TALLOC_FREE(frame);
1254 return NT_STATUS_NO_MEMORY;
1255 }
1256 status = make_user_info(frame, &user_info, user, user, domain, domain,
1257 lp_netbios_name(), local, lm_resp, nt_resp, NULL, NULL,
1258 NULL, AUTH_PASSWORD_RESPONSE);
1259 if (!NT_STATUS_IS_OK(status)) {
1260 DEBUG(10, ("make_user_info failed: %s\n", nt_errstr(status)));
1261 TALLOC_FREE(frame);
1262 return status;
1263 }
1264
1265 user_info->logon_parameters = logon_parameters;
1266
1267 /* We don't want any more mapping of the username */
1268 user_info->mapped_state = True;
1269
1270 /* We don't want to come back to winbindd or to do PAM account checks */
1271 user_info->flags |= USER_INFO_LOCAL_SAM_ONLY | USER_INFO_INFO3_AND_NO_AUTHZ;
1272
1273 status = make_auth_context_fixed(frame, &auth_context, challenge->data);
1274
1275 if (!NT_STATUS_IS_OK(status)) {
1276 DEBUG(0, ("Failed to test authentication with check_sam_security_info3: %s\n", nt_errstr(status)));
1277 TALLOC_FREE(frame);
1278 return status;
1279 }
1280
1281 status = auth_check_ntlm_password(mem_ctx,
1282 auth_context,
1283 user_info,
1284 &server_info);
1285
1286 if (!NT_STATUS_IS_OK(status)) {
1287 TALLOC_FREE(frame);
1288 return status;
1289 }
1290
1291 info3 = talloc_zero(mem_ctx, struct netr_SamInfo3);
1292 if (info3 == NULL) {
1293 TALLOC_FREE(frame);
1294 return NT_STATUS_NO_MEMORY;
1295 }
1296
1297 status = serverinfo_to_SamInfo3(server_info, info3);
1298 if (!NT_STATUS_IS_OK(status)) {
1299 TALLOC_FREE(frame);
1300 TALLOC_FREE(info3);
1301 DEBUG(0, ("serverinfo_to_SamInfo3 failed: %s\n",
1302 nt_errstr(status)));
1303 return status;
1304 }
1305
1306 *pinfo3 = info3;
1307 DEBUG(10, ("Authenticaticating user %s\\%s returned %s\n", domain,
1308 user, nt_errstr(status)));
1309 TALLOC_FREE(frame);
1310 return status;
1311 }
1312
1313 static NTSTATUS winbind_samlogon_retry_loop(struct winbindd_domain *domain,
1314 TALLOC_CTX *mem_ctx,
1315 uint32_t logon_parameters,
1316 const char *server,
1317 const char *username,
1318 const char *password,
1319 const char *domainname,
1320 const char *workstation,
1321 const uint8_t chal[8],
1322 DATA_BLOB lm_response,
1323 DATA_BLOB nt_response,
1324 bool interactive,
1325 struct netr_SamInfo3 **info3)
1326 {
1327 int attempts = 0;
1328 int netr_attempts = 0;
1329 bool retry = false;
1330 NTSTATUS result;
1331
1332 do {
1333 struct rpc_pipe_client *netlogon_pipe;
1334 uint8_t authoritative = 0;
1335 uint32_t flags = 0;
1336
1337 ZERO_STRUCTP(info3);
1338 retry = false;
1339
1340 result = cm_connect_netlogon(domain, &netlogon_pipe);
1341
1342 if (!NT_STATUS_IS_OK(result)) {
1343 DEBUG(3,("Could not open handle to NETLOGON pipe "
1344 "(error: %s, attempts: %d)\n",
1345 nt_errstr(result), netr_attempts));
1346
1347 /* After the first retry always close the connection */
1348 if (netr_attempts > 0) {
1349 DEBUG(3, ("This is again a problem for this "
1350 "particular call, forcing the close "
1351 "of this connection\n"));
1352 invalidate_cm_connection(domain);
1353 }
1354
1355 /* After the second retry failover to the next DC */
1356 if (netr_attempts > 1) {
1357 /*
1358 * If the netlogon server is not reachable then
1359 * it is possible that the DC is rebuilding
1360 * sysvol and shutdown netlogon for that time.
1361 * We should failover to the next dc.
1362 */
1363 DEBUG(3, ("This is the third problem for this "
1364 "particular call, adding DC to the "
1365 "negative cache list\n"));
1366 add_failed_connection_entry(domain->name,
1367 domain->dcname,
1368 result);
1369 saf_delete(domain->name);
1370 }
1371
1372 /* Only allow 3 retries */
1373 if (netr_attempts < 3) {
1374 DEBUG(3, ("The connection to netlogon "
1375 "failed, retrying\n"));
1376 netr_attempts++;
1377 retry = true;
1378 continue;
1379 }
1380 return result;
1381 }
1382 netr_attempts = 0;
1383
1384 if (interactive && username != NULL && password != NULL) {
1385 result = rpccli_netlogon_password_logon(domain->conn.netlogon_creds,
1386 netlogon_pipe->binding_handle,
1387 mem_ctx,
1388 logon_parameters,
1389 domainname,
1390 username,
1391 password,
1392 workstation,
1393 NetlogonInteractiveInformation,
1394 info3);
1395 } else {
1396 result = rpccli_netlogon_network_logon(domain->conn.netlogon_creds,
1397 netlogon_pipe->binding_handle,
1398 mem_ctx,
1399 logon_parameters,
1400 username,
1401 domainname,
1402 workstation,
1403 chal,
1404 lm_response,
1405 nt_response,
1406 &authoritative,
1407 &flags,
1408 info3);
1409 }
1410
1411 /*
1412 * we increment this after the "feature negotiation"
1413 * for can_do_samlogon_ex and can_do_validation6
1414 */
1415 attempts += 1;
1416
1417 /* We have to try a second time as cm_connect_netlogon
1418 might not yet have noticed that the DC has killed
1419 our connection. */
1420
1421 if (!rpccli_is_connected(netlogon_pipe)) {
1422 retry = true;
1423 continue;
1424 }
1425
1426 /* if we get access denied, a possible cause was that we had
1427 and open connection to the DC, but someone changed our
1428 machine account password out from underneath us using 'net
1429 rpc changetrustpw' */
1430
1431 if ( NT_STATUS_EQUAL(result, NT_STATUS_ACCESS_DENIED) ) {
1432 DEBUG(3,("winbind_samlogon_retry_loop: sam_logon returned "
1433 "ACCESS_DENIED. Maybe the trust account "
1434 "password was changed and we didn't know it. "
1435 "Killing connections to domain %s\n",
1436 domainname));
1437 invalidate_cm_connection(domain);
1438 retry = true;
1439 }
1440
1441 if (NT_STATUS_EQUAL(result, NT_STATUS_RPC_PROCNUM_OUT_OF_RANGE)) {
1442 /*
1443 * Got DCERPC_FAULT_OP_RNG_ERROR for SamLogon
1444 * (no Ex). This happens against old Samba
1445 * DCs, if LogonSamLogonEx() fails with an error
1446 * e.g. NT_STATUS_NO_SUCH_USER or NT_STATUS_WRONG_PASSWORD.
1447 *
1448 * The server will log something like this:
1449 * api_net_sam_logon_ex: Failed to marshall NET_R_SAM_LOGON_EX.
1450 *
1451 * This sets the whole connection into a fault_state mode
1452 * and all following request get NT_STATUS_RPC_PROCNUM_OUT_OF_RANGE.
1453 *
1454 * This also happens to our retry with LogonSamLogonWithFlags()
1455 * and LogonSamLogon().
1456 *
1457 * In order to recover from this situation, we need to
1458 * drop the connection.
1459 */
1460 invalidate_cm_connection(domain);
1461 result = NT_STATUS_LOGON_FAILURE;
1462 break;
1463 }
1464
1465 } while ( (attempts < 2) && retry );
1466
1467 if (NT_STATUS_EQUAL(result, NT_STATUS_IO_TIMEOUT)) {
1468 DEBUG(3,("winbind_samlogon_retry_loop: sam_network_logon(ex) "
1469 "returned NT_STATUS_IO_TIMEOUT after the retry."
1470 "Killing connections to domain %s\n",
1471 domainname));
1472 invalidate_cm_connection(domain);
1473 }
1474 return result;
1475 }
1476
1477 static NTSTATUS winbindd_dual_pam_auth_samlogon(TALLOC_CTX *mem_ctx,
1478 struct winbindd_domain *domain,
1479 const char *user,
1480 const char *pass,
1481 uint32_t request_flags,
1482 struct netr_SamInfo3 **info3)
1483 {
1484
1485 uchar chal[8];
1486 DATA_BLOB lm_resp;
1487 DATA_BLOB nt_resp;
1488 unsigned char local_nt_response[24];
1489 fstring name_domain, name_user;
1490 NTSTATUS result;
1491 struct netr_SamInfo3 *my_info3 = NULL;
1492
1493 *info3 = NULL;
1494
1495 DEBUG(10,("winbindd_dual_pam_auth_samlogon\n"));
1496
1497 /* Parse domain and username */
1498
1499 parse_domain_user(user, name_domain, name_user);
1500
1501 /* do password magic */
1502
1503 generate_random_buffer(chal, sizeof(chal));
1504
1505 if (lp_client_ntlmv2_auth()) {
1506 DATA_BLOB server_chal;
1507 DATA_BLOB names_blob;
1508 server_chal = data_blob_const(chal, 8);
1509
1510 /* note that the 'workgroup' here is for the local
1511 machine. The 'server name' must match the
1512 'workstation' passed to the actual SamLogon call.
1513 */
1514 names_blob = NTLMv2_generate_names_blob(
1515 mem_ctx, lp_netbios_name(), lp_workgroup());
1516
1517 if (!SMBNTLMv2encrypt(mem_ctx, name_user, name_domain,
1518 pass,
1519 &server_chal,
1520 &names_blob,
1521 &lm_resp, &nt_resp, NULL, NULL)) {
1522 data_blob_free(&names_blob);
1523 DEBUG(0, ("winbindd_pam_auth: SMBNTLMv2encrypt() failed!\n"));
1524 result = NT_STATUS_NO_MEMORY;
1525 goto done;
1526 }
1527 data_blob_free(&names_blob);
1528 } else {
1529 lm_resp = data_blob_null;
1530 SMBNTencrypt(pass, chal, local_nt_response);
1531
1532 nt_resp = data_blob_talloc(mem_ctx, local_nt_response,
1533 sizeof(local_nt_response));
1534 }
1535
1536 if (strequal(name_domain, get_global_sam_name())) {
1537 DATA_BLOB chal_blob = data_blob_const(chal, sizeof(chal));
1538
1539 result = winbindd_dual_auth_passdb(
1540 mem_ctx, 0, name_domain, name_user,
1541 &chal_blob, &lm_resp, &nt_resp, info3);
1542
1543 /*
1544 * We need to try the remote NETLOGON server if this is NOT_IMPLEMENTED
1545 */
1546 if (!NT_STATUS_EQUAL(result, NT_STATUS_NOT_IMPLEMENTED)) {
1547 goto done;
1548 }
1549 }
1550
1551 /* check authentication loop */
1552
1553 result = winbind_samlogon_retry_loop(domain,
1554 mem_ctx,
1555 0,
1556 domain->dcname,
1557 name_user,
1558 pass,
1559 name_domain,
1560 lp_netbios_name(),
1561 chal,
1562 lm_resp,
1563 nt_resp,
1564 true, /* interactive */
1565 &my_info3);
1566 if (!NT_STATUS_IS_OK(result)) {
1567 goto done;
1568 }
1569
1570 /* handle the case where a NT4 DC does not fill in the acct_flags in
1571 * the samlogon reply info3. When accurate info3 is required by the
1572 * caller, we look up the account flags ourselve - gd */
1573
1574 if ((request_flags & WBFLAG_PAM_INFO3_TEXT) &&
1575 NT_STATUS_IS_OK(result) && (my_info3->base.acct_flags == 0)) {
1576
1577 struct rpc_pipe_client *samr_pipe;
1578 struct policy_handle samr_domain_handle, user_pol;
1579 union samr_UserInfo *info = NULL;
1580 NTSTATUS status_tmp, result_tmp;
1581 uint32_t acct_flags;
1582 struct dcerpc_binding_handle *b;
1583
1584 status_tmp = cm_connect_sam(domain, mem_ctx, false,
1585 &samr_pipe, &samr_domain_handle);
1586
1587 if (!NT_STATUS_IS_OK(status_tmp)) {
1588 DEBUG(3, ("could not open handle to SAMR pipe: %s\n",
1589 nt_errstr(status_tmp)));
1590 goto done;
1591 }
1592
1593 b = samr_pipe->binding_handle;
1594
1595 status_tmp = dcerpc_samr_OpenUser(b, mem_ctx,
1596 &samr_domain_handle,
1597 MAXIMUM_ALLOWED_ACCESS,
1598 my_info3->base.rid,
1599 &user_pol,
1600 &result_tmp);
1601
1602 if (!NT_STATUS_IS_OK(status_tmp)) {
1603 DEBUG(3, ("could not open user handle on SAMR pipe: %s\n",
1604 nt_errstr(status_tmp)));
1605 goto done;
1606 }
1607 if (!NT_STATUS_IS_OK(result_tmp)) {
1608 DEBUG(3, ("could not open user handle on SAMR pipe: %s\n",
1609 nt_errstr(result_tmp)));
1610 goto done;
1611 }
1612
1613 status_tmp = dcerpc_samr_QueryUserInfo(b, mem_ctx,
1614 &user_pol,
1615 16,
1616 &info,
1617 &result_tmp);
1618
1619 if (!NT_STATUS_IS_OK(status_tmp)) {
1620 DEBUG(3, ("could not query user info on SAMR pipe: %s\n",
1621 nt_errstr(status_tmp)));
1622 dcerpc_samr_Close(b, mem_ctx, &user_pol, &result_tmp);
1623 goto done;
1624 }
1625 if (!NT_STATUS_IS_OK(result_tmp)) {
1626 DEBUG(3, ("could not query user info on SAMR pipe: %s\n",
1627 nt_errstr(result_tmp)));
1628 dcerpc_samr_Close(b, mem_ctx, &user_pol, &result_tmp);
1629 goto done;
1630 }
1631
1632 acct_flags = info->info16.acct_flags;
1633
1634 if (acct_flags == 0) {
1635 dcerpc_samr_Close(b, mem_ctx, &user_pol, &result_tmp);
1636 goto done;
1637 }
1638
1639 my_info3->base.acct_flags = acct_flags;
1640
1641 DEBUG(10,("successfully retrieved acct_flags 0x%x\n", acct_flags));
1642
1643 dcerpc_samr_Close(b, mem_ctx, &user_pol, &result_tmp);
1644 }
1645
1646 *info3 = my_info3;
1647 done:
1648 return result;
1649 }
1650
1651 enum winbindd_result winbindd_dual_pam_auth(struct winbindd_domain *domain,
1652 struct winbindd_cli_state *state)
1653 {
1654 NTSTATUS result = NT_STATUS_LOGON_FAILURE;
1655 NTSTATUS krb5_result = NT_STATUS_OK;
1656 fstring name_domain, name_user;
1657 char *mapped_user;
1658 fstring domain_user;
1659 struct netr_SamInfo3 *info3 = NULL;
1660 NTSTATUS name_map_status = NT_STATUS_UNSUCCESSFUL;
1661
1662 /* Ensure null termination */
1663 state->request->data.auth.user[sizeof(state->request->data.auth.user)-1]='\0';
1664
1665 /* Ensure null termination */
1666 state->request->data.auth.pass[sizeof(state->request->data.auth.pass)-1]='\0';
1667
1668 DEBUG(3, ("[%5lu]: dual pam auth %s\n", (unsigned long)state->pid,
1669 state->request->data.auth.user));
1670
1671 /* Parse domain and username */
1672
1673 name_map_status = normalize_name_unmap(state->mem_ctx,
1674 state->request->data.auth.user,
1675 &mapped_user);
1676
1677 /* If the name normalization didnt' actually do anything,
1678 just use the original name */
1679
1680 if (!NT_STATUS_IS_OK(name_map_status) &&
1681 !NT_STATUS_EQUAL(name_map_status, NT_STATUS_FILE_RENAMED))
1682 {
1683 mapped_user = state->request->data.auth.user;
1684 }
1685
1686 parse_domain_user(mapped_user, name_domain, name_user);
1687
1688 if ( mapped_user != state->request->data.auth.user ) {
1689 fstr_sprintf( domain_user, "%s%c%s", name_domain,
1690 *lp_winbind_separator(),
1691 name_user );
1692 strlcpy( state->request->data.auth.user, domain_user,
1693 sizeof(state->request->data.auth.user));
1694 }
1695
1696 if (!domain->online) {
1697 result = NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND;
1698 if (domain->startup) {
1699 /* Logons are very important to users. If we're offline and
1700 we get a request within the first 30 seconds of startup,
1701 try very hard to find a DC and go online. */
1702
1703 DEBUG(10,("winbindd_dual_pam_auth: domain: %s offline and auth "
1704 "request in startup mode.\n", domain->name ));
1705
1706 winbindd_flush_negative_conn_cache(domain);
1707 result = init_dc_connection(domain, false);
1708 }
1709 }
1710
1711 DEBUG(10,("winbindd_dual_pam_auth: domain: %s last was %s\n", domain->name, domain->online ? "online":"offline"));
1712
1713 /* Check for Kerberos authentication */
1714 if (domain->online && (state->request->flags & WBFLAG_PAM_KRB5)) {
1715
1716 result = winbindd_dual_pam_auth_kerberos(domain, state, &info3);
1717 /* save for later */
1718 krb5_result = result;
1719
1720
1721 if (NT_STATUS_IS_OK(result)) {
1722 DEBUG(10,("winbindd_dual_pam_auth_kerberos succeeded\n"));
1723 goto process_result;
1724 } else {
1725 DEBUG(10,("winbindd_dual_pam_auth_kerberos failed: %s\n", nt_errstr(result)));
1726 }
1727
1728 if (NT_STATUS_EQUAL(result, NT_STATUS_NO_LOGON_SERVERS) ||
1729 NT_STATUS_EQUAL(result, NT_STATUS_IO_TIMEOUT) ||
1730 NT_STATUS_EQUAL(result, NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND)) {
1731 DEBUG(10,("winbindd_dual_pam_auth_kerberos setting domain to offline\n"));
1732 set_domain_offline( domain );
1733 goto cached_logon;
1734 }
1735
1736 /* there are quite some NT_STATUS errors where there is no
1737 * point in retrying with a samlogon, we explictly have to take
1738 * care not to increase the bad logon counter on the DC */
1739
1740 if (NT_STATUS_EQUAL(result, NT_STATUS_ACCOUNT_DISABLED) ||
1741 NT_STATUS_EQUAL(result, NT_STATUS_ACCOUNT_EXPIRED) ||
1742 NT_STATUS_EQUAL(result, NT_STATUS_ACCOUNT_LOCKED_OUT) ||
1743 NT_STATUS_EQUAL(result, NT_STATUS_INVALID_LOGON_HOURS) ||
1744 NT_STATUS_EQUAL(result, NT_STATUS_INVALID_WORKSTATION) ||
1745 NT_STATUS_EQUAL(result, NT_STATUS_LOGON_FAILURE) ||
1746 NT_STATUS_EQUAL(result, NT_STATUS_NO_SUCH_USER) ||
1747 NT_STATUS_EQUAL(result, NT_STATUS_PASSWORD_EXPIRED) ||
1748 NT_STATUS_EQUAL(result, NT_STATUS_PASSWORD_MUST_CHANGE) ||
1749 NT_STATUS_EQUAL(result, NT_STATUS_WRONG_PASSWORD)) {
1750 goto done;
1751 }
1752
1753 if (state->request->flags & WBFLAG_PAM_FALLBACK_AFTER_KRB5) {
1754 DEBUG(3,("falling back to samlogon\n"));
1755 goto sam_logon;
1756 } else {
1757 goto cached_logon;
1758 }
1759 }
1760
1761 sam_logon:
1762 /* Check for Samlogon authentication */
1763 if (domain->online) {
1764 result = winbindd_dual_pam_auth_samlogon(
1765 state->mem_ctx, domain,
1766 state->request->data.auth.user,
1767 state->request->data.auth.pass,
1768 state->request->flags,
1769 &info3);
1770
1771 if (NT_STATUS_IS_OK(result)) {
1772 DEBUG(10,("winbindd_dual_pam_auth_samlogon succeeded\n"));
1773 /* add the Krb5 err if we have one */
1774 if ( NT_STATUS_EQUAL(krb5_result, NT_STATUS_TIME_DIFFERENCE_AT_DC ) ) {
1775 info3->base.user_flags |= LOGON_KRB5_FAIL_CLOCK_SKEW;
1776 }
1777 goto process_result;
1778 }
1779
1780 DEBUG(10,("winbindd_dual_pam_auth_samlogon failed: %s\n",
1781 nt_errstr(result)));
1782
1783 if (NT_STATUS_EQUAL(result, NT_STATUS_NO_LOGON_SERVERS) ||
1784 NT_STATUS_EQUAL(result, NT_STATUS_IO_TIMEOUT) ||
1785 NT_STATUS_EQUAL(result, NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND))
1786 {
1787 DEBUG(10,("winbindd_dual_pam_auth_samlogon setting domain to offline\n"));
1788 set_domain_offline( domain );
1789 goto cached_logon;
1790 }
1791
1792 if (domain->online) {
1793 /* We're still online - fail. */
1794 goto done;
1795 }
1796 }
1797
1798 cached_logon:
1799 /* Check for Cached logons */
1800 if (!domain->online && (state->request->flags & WBFLAG_PAM_CACHED_LOGIN) &&
1801 lp_winbind_offline_logon()) {
1802
1803 result = winbindd_dual_pam_auth_cached(domain, state, &info3);
1804
1805 if (NT_STATUS_IS_OK(result)) {
1806 DEBUG(10,("winbindd_dual_pam_auth_cached succeeded\n"));
1807 goto process_result;
1808 } else {
1809 DEBUG(10,("winbindd_dual_pam_auth_cached failed: %s\n", nt_errstr(result)));
1810 goto done;
1811 }
1812 }
1813
1814 process_result:
1815
1816 if (NT_STATUS_IS_OK(result)) {
1817
1818 struct dom_sid user_sid;
1819
1820 /* In all codepaths where result == NT_STATUS_OK info3 must have
1821 been initialized. */
1822 if (!info3) {
1823 result = NT_STATUS_INTERNAL_ERROR;
1824 goto done;
1825 }
1826
1827 sid_compose(&user_sid, info3->base.domain_sid,
1828 info3->base.rid);
1829
1830 if (info3->base.full_name.string == NULL) {
1831 struct netr_SamInfo3 *cached_info3;
1832
1833 cached_info3 = netsamlogon_cache_get(state->mem_ctx,
1834 &user_sid);
1835 if (cached_info3 != NULL &&
1836 cached_info3->base.full_name.string != NULL) {
1837 info3->base.full_name.string =
1838 talloc_strdup(info3,
1839 cached_info3->base.full_name.string);
1840 } else {
1841
1842 /* this might fail so we dont check the return code */
1843 wcache_query_user_fullname(domain,
1844 info3,
1845 &user_sid,
1846 &info3->base.full_name.string);
1847 }
1848 }
1849
1850 wcache_invalidate_samlogon(find_domain_from_name(name_domain),
1851 &user_sid);
1852 netsamlogon_cache_store(name_user, info3);
1853
1854 /* save name_to_sid info as early as possible (only if
1855 this is our primary domain so we don't invalidate
1856 the cache entry by storing the seq_num for the wrong
1857 domain). */
1858 if ( domain->primary ) {
1859 cache_name2sid(domain, name_domain, name_user,
1860 SID_NAME_USER, &user_sid);
1861 }
1862
1863 /* Check if the user is in the right group */
1864
1865 result = check_info3_in_group(
1866 info3,
1867 state->request->data.auth.require_membership_of_sid);
1868 if (!NT_STATUS_IS_OK(result)) {
1869 DEBUG(3, ("User %s is not in the required group (%s), so plaintext authentication is rejected\n",
1870 state->request->data.auth.user,
1871 state->request->data.auth.require_membership_of_sid));
1872 goto done;
1873 }
1874
1875 result = append_auth_data(state->mem_ctx, state->response,
1876 state->request->flags, info3,
1877 name_domain, name_user);
1878 if (!NT_STATUS_IS_OK(result)) {
1879 goto done;
1880 }
1881
1882 if ((state->request->flags & WBFLAG_PAM_CACHED_LOGIN)
1883 && lp_winbind_offline_logon()) {
1884
1885 result = winbindd_store_creds(domain,
1886 state->request->data.auth.user,
1887 state->request->data.auth.pass,
1888 info3);
1889 }
1890
1891 if (state->request->flags & WBFLAG_PAM_GET_PWD_POLICY) {
1892 struct winbindd_domain *our_domain = find_our_domain();
1893
1894 /* This is not entirely correct I believe, but it is
1895 consistent. Only apply the password policy settings
1896 too warn users for our own domain. Cannot obtain these
1897 from trusted DCs all the time so don't do it at all.
1898 -- jerry */
1899
1900 result = NT_STATUS_NOT_SUPPORTED;
1901 if (our_domain == domain ) {
1902 result = fillup_password_policy(
1903 our_domain, state->response);
1904 }
1905
1906 if (!NT_STATUS_IS_OK(result)
1907 && !NT_STATUS_EQUAL(result, NT_STATUS_NOT_SUPPORTED) )
1908 {
1909 DEBUG(10,("Failed to get password policies for domain %s: %s\n",
1910 domain->name, nt_errstr(result)));
1911 goto done;
1912 }
1913 }
1914
1915 result = NT_STATUS_OK;
1916 }
1917
1918 done:
1919 /* give us a more useful (more correct?) error code */
1920 if ((NT_STATUS_EQUAL(result, NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND) ||
1921 (NT_STATUS_EQUAL(result, NT_STATUS_UNSUCCESSFUL)))) {
1922 result = NT_STATUS_NO_LOGON_SERVERS;
1923 }
1924
1925 set_auth_errors(state->response, result);
1926
1927 DEBUG(NT_STATUS_IS_OK(result) ? 5 : 2, ("Plain-text authentication for user %s returned %s (PAM: %d)\n",
1928 state->request->data.auth.user,
1929 state->response->data.auth.nt_status_string,
1930 state->response->data.auth.pam_error));
1931
1932 return NT_STATUS_IS_OK(result) ? WINBINDD_OK : WINBINDD_ERROR;
1933 }
1934
1935 NTSTATUS winbind_dual_SamLogon(struct winbindd_domain *domain,
1936 TALLOC_CTX *mem_ctx,
1937 uint32_t logon_parameters,
1938 const char *name_user,
1939 const char *name_domain,
1940 const char *workstation,
1941 const uint8_t chal[8],
1942 DATA_BLOB lm_response,
1943 DATA_BLOB nt_response,
1944 struct netr_SamInfo3 **info3)
1945 {
1946 NTSTATUS result;
1947
1948 if (strequal(name_domain, get_global_sam_name())) {
1949 DATA_BLOB chal_blob = data_blob_const(
1950 chal, 8);
1951
1952 result = winbindd_dual_auth_passdb(
1953 mem_ctx,
1954 logon_parameters,
1955 name_domain, name_user,
1956 &chal_blob, &lm_response, &nt_response, info3);
1957
1958 /*
1959 * We need to try the remote NETLOGON server if this is NOT_IMPLEMENTED
1960 */
1961 if (!NT_STATUS_EQUAL(result, NT_STATUS_NOT_IMPLEMENTED)) {
1962 goto process_result;
1963 }
1964 }
1965
1966 result = winbind_samlogon_retry_loop(domain,
1967 mem_ctx,
1968 logon_parameters,
1969 domain->dcname,
1970 name_user,
1971 NULL, /* password */
1972 name_domain,
1973 /* Bug #3248 - found by Stefan Burkei. */
1974 workstation, /* We carefully set this above so use it... */
1975 chal,
1976 lm_response,
1977 nt_response,
1978 false, /* interactive */
1979 info3);
1980 if (!NT_STATUS_IS_OK(result)) {
1981 goto done;
1982 }
1983
1984 process_result:
1985
1986 if (NT_STATUS_IS_OK(result)) {
1987 struct dom_sid user_sid;
1988
1989 sid_compose(&user_sid, (*info3)->base.domain_sid,
1990 (*info3)->base.rid);
1991
1992 if ((*info3)->base.full_name.string == NULL) {
1993 struct netr_SamInfo3 *cached_info3;
1994
1995 cached_info3 = netsamlogon_cache_get(mem_ctx,
1996 &user_sid);
1997 if (cached_info3 != NULL &&
1998 cached_info3->base.full_name.string != NULL) {
1999 (*info3)->base.full_name.string =
2000 talloc_strdup(*info3,
2001 cached_info3->base.full_name.string);
2002 } else {
2003
2004 /* this might fail so we dont check the return code */
2005 wcache_query_user_fullname(domain,
2006 *info3,
2007 &user_sid,
2008 &(*info3)->base.full_name.string);
2009 }
2010 }
2011
2012 wcache_invalidate_samlogon(find_domain_from_name(name_domain),
2013 &user_sid);
2014 netsamlogon_cache_store(name_user, *info3);
2015 }
2016
2017 done:
2018
2019 /* give us a more useful (more correct?) error code */
2020 if ((NT_STATUS_EQUAL(result, NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND) ||
2021 (NT_STATUS_EQUAL(result, NT_STATUS_UNSUCCESSFUL)))) {
2022 result = NT_STATUS_NO_LOGON_SERVERS;
2023 }
2024
2025 DEBUG(NT_STATUS_IS_OK(result) ? 5 : 2,
2026 ("NTLM CRAP authentication for user [%s]\\[%s] returned %s\n",
2027 name_domain,
2028 name_user,
2029 nt_errstr(result)));
2030
2031 return result;
2032 }
2033
2034 enum winbindd_result winbindd_dual_pam_auth_crap(struct winbindd_domain *domain,
2035 struct winbindd_cli_state *state)
2036 {
2037 NTSTATUS result;
2038 struct netr_SamInfo3 *info3 = NULL;
2039 const char *name_user = NULL;
2040 const char *name_domain = NULL;
2041 const char *workstation;
2042
2043 DATA_BLOB lm_resp, nt_resp;
2044
2045 /* This is child-only, so no check for privileged access is needed
2046 anymore */
2047
2048 /* Ensure null termination */
2049 state->request->data.auth_crap.user[sizeof(state->request->data.auth_crap.user)-1]=0;
2050 state->request->data.auth_crap.domain[sizeof(state->request->data.auth_crap.domain)-1]=0;
2051
2052 name_user = state->request->data.auth_crap.user;
2053 name_domain = state->request->data.auth_crap.domain;
2054 workstation = state->request->data.auth_crap.workstation;
2055
2056 DEBUG(3, ("[%5lu]: pam auth crap domain: %s user: %s\n", (unsigned long)state->pid,
2057 name_domain, name_user));
2058
2059 if (state->request->data.auth_crap.lm_resp_len > sizeof(state->request->data.auth_crap.lm_resp)
2060 || state->request->data.auth_crap.nt_resp_len > sizeof(state->request->data.auth_crap.nt_resp)) {
2061 if (!(state->request->flags & WBFLAG_BIG_NTLMV2_BLOB) ||
2062 state->request->extra_len != state->request->data.auth_crap.nt_resp_len) {
2063 DEBUG(0, ("winbindd_pam_auth_crap: invalid password length %u/%u\n",
2064 state->request->data.auth_crap.lm_resp_len,
2065 state->request->data.auth_crap.nt_resp_len));
2066 result = NT_STATUS_INVALID_PARAMETER;
2067 goto done;
2068 }
2069 }
2070
2071 lm_resp = data_blob_talloc(state->mem_ctx, state->request->data.auth_crap.lm_resp,
2072 state->request->data.auth_crap.lm_resp_len);
2073
2074 if (state->request->flags & WBFLAG_BIG_NTLMV2_BLOB) {
2075 nt_resp = data_blob_talloc(state->mem_ctx,
2076 state->request->extra_data.data,
2077 state->request->data.auth_crap.nt_resp_len);
2078 } else {
2079 nt_resp = data_blob_talloc(state->mem_ctx,
2080 state->request->data.auth_crap.nt_resp,
2081 state->request->data.auth_crap.nt_resp_len);
2082 }
2083
2084 result = winbind_dual_SamLogon(domain,
2085 state->mem_ctx,
2086 state->request->data.auth_crap.logon_parameters,
2087 name_user,
2088 name_domain,
2089 /* Bug #3248 - found by Stefan Burkei. */
2090 workstation, /* We carefully set this above so use it... */
2091 state->request->data.auth_crap.chal,
2092 lm_resp,
2093 nt_resp,
2094 &info3);
2095 if (!NT_STATUS_IS_OK(result)) {
2096 goto done;
2097 }
2098
2099 if (NT_STATUS_IS_OK(result)) {
2100 /* Check if the user is in the right group */
2101
2102 result = check_info3_in_group(
2103 info3,
2104 state->request->data.auth_crap.require_membership_of_sid);
2105 if (!NT_STATUS_IS_OK(result)) {
2106 DEBUG(3, ("User %s is not in the required group (%s), so "
2107 "crap authentication is rejected\n",
2108 state->request->data.auth_crap.user,
2109 state->request->data.auth_crap.require_membership_of_sid));
2110 goto done;
2111 }
2112
2113 result = append_auth_data(state->mem_ctx, state->response,
2114 state->request->flags, info3,
2115 name_domain, name_user);
2116 if (!NT_STATUS_IS_OK(result)) {
2117 goto done;
2118 }
2119 }
2120
2121 done:
2122
2123 if (state->request->flags & WBFLAG_PAM_NT_STATUS_SQUASH) {
2124 result = nt_status_squash(result);
2125 }
2126
2127 set_auth_errors(state->response, result);
2128
2129 return NT_STATUS_IS_OK(result) ? WINBINDD_OK : WINBINDD_ERROR;
2130 }
2131
2132 enum winbindd_result winbindd_dual_pam_chauthtok(struct winbindd_domain *contact_domain,
2133 struct winbindd_cli_state *state)
2134 {
2135 char *oldpass;
2136 char *newpass = NULL;
2137 struct policy_handle dom_pol;
2138 struct rpc_pipe_client *cli = NULL;
2139 bool got_info = false;
2140 struct samr_DomInfo1 *info = NULL;
2141 struct userPwdChangeFailureInformation *reject = NULL;
2142 NTSTATUS result = NT_STATUS_UNSUCCESSFUL;
2143 fstring domain, user;
2144 struct dcerpc_binding_handle *b = NULL;
2145
2146 ZERO_STRUCT(dom_pol);
2147
2148 DEBUG(3, ("[%5lu]: dual pam chauthtok %s\n", (unsigned long)state->pid,
2149 state->request->data.auth.user));
2150
2151 if (!parse_domain_user(state->request->data.chauthtok.user, domain, user)) {
2152 goto done;
2153 }
2154
2155 /* Change password */
2156
2157 oldpass = state->request->data.chauthtok.oldpass;
2158 newpass = state->request->data.chauthtok.newpass;
2159
2160 /* Initialize reject reason */
2161 state->response->data.auth.reject_reason = Undefined;
2162
2163 /* Get sam handle */
2164
2165 result = cm_connect_sam(contact_domain, state->mem_ctx, true, &cli,
2166 &dom_pol);
2167 if (!NT_STATUS_IS_OK(result)) {
2168 DEBUG(1, ("could not get SAM handle on DC for %s\n", domain));
2169 goto done;
2170 }
2171
2172 b = cli->binding_handle;
2173
2174 result = rpccli_samr_chgpasswd_user3(cli, state->mem_ctx,
2175 user,
2176 newpass,
2177 oldpass,
2178 &info,
2179 &reject);
2180
2181 /* Windows 2003 returns NT_STATUS_PASSWORD_RESTRICTION */
2182
2183 if (NT_STATUS_EQUAL(result, NT_STATUS_PASSWORD_RESTRICTION) ) {
2184
2185 fill_in_password_policy(state->response, info);
2186
2187 state->response->data.auth.reject_reason =
2188 reject->extendedFailureReason;
2189
2190 got_info = true;
2191 }
2192
2193 /* atm the pidl generated rpccli_samr_ChangePasswordUser3 function will
2194 * return with NT_STATUS_BUFFER_TOO_SMALL for w2k dcs as w2k just
2195 * returns with 4byte error code (NT_STATUS_NOT_SUPPORTED) which is too
2196 * short to comply with the samr_ChangePasswordUser3 idl - gd */
2197
2198 /* only fallback when the chgpasswd_user3 call is not supported */
2199 if (NT_STATUS_EQUAL(result, NT_STATUS_RPC_PROCNUM_OUT_OF_RANGE) ||
2200 NT_STATUS_EQUAL(result, NT_STATUS_NOT_SUPPORTED) ||
2201 NT_STATUS_EQUAL(result, NT_STATUS_BUFFER_TOO_SMALL) ||
2202 NT_STATUS_EQUAL(result, NT_STATUS_NOT_IMPLEMENTED)) {
2203
2204 DEBUG(10,("Password change with chgpasswd_user3 failed with: %s, retrying chgpasswd_user2\n",
2205 nt_errstr(result)));
2206
2207 result = rpccli_samr_chgpasswd_user2(cli, state->mem_ctx, user, newpass, oldpass);
2208
2209 /* Windows 2000 returns NT_STATUS_ACCOUNT_RESTRICTION.
2210 Map to the same status code as Windows 2003. */
2211
2212 if ( NT_STATUS_EQUAL(NT_STATUS_ACCOUNT_RESTRICTION, result ) ) {
2213 result = NT_STATUS_PASSWORD_RESTRICTION;
2214 }
2215 }
2216
2217 done:
2218
2219 if (NT_STATUS_IS_OK(result)
2220 && (state->request->flags & WBFLAG_PAM_CACHED_LOGIN)
2221 && lp_winbind_offline_logon()) {
2222 result = winbindd_update_creds_by_name(contact_domain, user,
2223 newpass);
2224 /* Again, this happens when we login from gdm or xdm
2225 * and the password expires, *BUT* cached crendentials
2226 * doesn't exist. winbindd_update_creds_by_name()
2227 * returns NT_STATUS_NO_SUCH_USER.
2228 * This is not a failure.
2229 * --- BoYang
2230 * */
2231 if (NT_STATUS_EQUAL(result, NT_STATUS_NO_SUCH_USER)) {
2232 result = NT_STATUS_OK;
2233 }
2234
2235 if (!NT_STATUS_IS_OK(result)) {
2236 DEBUG(10, ("Failed to store creds: %s\n",
2237 nt_errstr(result)));
2238 goto process_result;
2239 }
2240 }
2241
2242 if (!NT_STATUS_IS_OK(result) && !got_info && contact_domain) {
2243
2244 NTSTATUS policy_ret;
2245
2246 policy_ret = fillup_password_policy(
2247 contact_domain, state->response);
2248
2249 /* failure of this is non critical, it will just provide no
2250 * additional information to the client why the change has
2251 * failed - Guenther */
2252
2253 if (!NT_STATUS_IS_OK(policy_ret)) {
2254 DEBUG(10,("Failed to get password policies: %s\n", nt_errstr(policy_ret)));
2255 goto process_result;
2256 }
2257 }
2258
2259 process_result:
2260
2261 if (strequal(contact_domain->name, get_global_sam_name())) {
2262 /* FIXME: internal rpc pipe does not cache handles yet */
2263 if (b) {
2264 if (is_valid_policy_hnd(&dom_pol)) {
2265 NTSTATUS _result;
2266 dcerpc_samr_Close(b, state->mem_ctx, &dom_pol, &_result);
2267 }
2268 TALLOC_FREE(cli);
2269 }
2270 }
2271
2272 set_auth_errors(state->response, result);
2273
2274 DEBUG(NT_STATUS_IS_OK(result) ? 5 : 2,
2275 ("Password change for user [%s]\\[%s] returned %s (PAM: %d)\n",
2276 domain,
2277 user,
2278 state->response->data.auth.nt_status_string,
2279 state->response->data.auth.pam_error));
2280
2281 return NT_STATUS_IS_OK(result) ? WINBINDD_OK : WINBINDD_ERROR;
2282 }
2283
2284 enum winbindd_result winbindd_dual_pam_logoff(struct winbindd_domain *domain,
2285 struct winbindd_cli_state *state)
2286 {
2287 NTSTATUS result = NT_STATUS_NOT_SUPPORTED;
2288
2289 DEBUG(3, ("[%5lu]: pam dual logoff %s\n", (unsigned long)state->pid,
2290 state->request->data.logoff.user));
2291
2292 if (!(state->request->flags & WBFLAG_PAM_KRB5)) {
2293 result = NT_STATUS_OK;
2294 goto process_result;
2295 }
2296
2297 if (state->request->data.logoff.krb5ccname[0] == '\0') {
2298 result = NT_STATUS_OK;
2299 goto process_result;
2300 }
2301
2302 #ifdef HAVE_KRB5
2303
2304 if (state->request->data.logoff.uid < 0) {
2305 DEBUG(0,("winbindd_pam_logoff: invalid uid\n"));
2306 goto process_result;
2307 }
2308
2309 /* what we need here is to find the corresponding krb5 ccache name *we*
2310 * created for a given username and destroy it */
2311
2312 if (!ccache_entry_exists(state->request->data.logoff.user)) {
2313 result = NT_STATUS_OK;
2314 DEBUG(10,("winbindd_pam_logoff: no entry found.\n"));
2315 goto process_result;
2316 }
2317
2318 if (!ccache_entry_identical(state->request->data.logoff.user,
2319 state->request->data.logoff.uid,
2320 state->request->data.logoff.krb5ccname)) {
2321 DEBUG(0,("winbindd_pam_logoff: cached entry differs.\n"));
2322 goto process_result;
2323 }
2324
2325 result = remove_ccache(state->request->data.logoff.user);
2326 if (!NT_STATUS_IS_OK(result)) {
2327 DEBUG(0,("winbindd_pam_logoff: failed to remove ccache: %s\n",
2328 nt_errstr(result)));
2329 goto process_result;
2330 }
2331
2332 /*
2333 * Remove any mlock'ed memory creds in the child
2334 * we might be using for krb5 ticket renewal.
2335 */
2336
2337 winbindd_delete_memory_creds(state->request->data.logoff.user);
2338
2339 #else
2340 result = NT_STATUS_NOT_SUPPORTED;
2341 #endif
2342
2343 process_result:
2344
2345
2346 set_auth_errors(state->response, result);
2347
2348 return NT_STATUS_IS_OK(result) ? WINBINDD_OK : WINBINDD_ERROR;
2349 }
2350
2351 /* Change user password with auth crap*/
2352
2353 enum winbindd_result winbindd_dual_pam_chng_pswd_auth_crap(struct winbindd_domain *domainSt, struct winbindd_cli_state *state)
2354 {
2355 NTSTATUS result;
2356 DATA_BLOB new_nt_password;
2357 DATA_BLOB old_nt_hash_enc;
2358 DATA_BLOB new_lm_password;
2359 DATA_BLOB old_lm_hash_enc;
2360 fstring domain,user;
2361 struct policy_handle dom_pol;
2362 struct winbindd_domain *contact_domain = domainSt;
2363 struct rpc_pipe_client *cli = NULL;
2364 struct dcerpc_binding_handle *b = NULL;
2365
2366 ZERO_STRUCT(dom_pol);
2367
2368 /* Ensure null termination */
2369 state->request->data.chng_pswd_auth_crap.user[
2370 sizeof(state->request->data.chng_pswd_auth_crap.user)-1]=0;
2371 state->request->data.chng_pswd_auth_crap.domain[
2372 sizeof(state->request->data.chng_pswd_auth_crap.domain)-1]=0;
2373 *domain = 0;
2374 *user = 0;
2375
2376 DEBUG(3, ("[%5lu]: pam change pswd auth crap domain: %s user: %s\n",
2377 (unsigned long)state->pid,
2378 state->request->data.chng_pswd_auth_crap.domain,
2379 state->request->data.chng_pswd_auth_crap.user));
2380
2381 if (lp_winbind_offline_logon()) {
2382 DEBUG(0,("Refusing password change as winbind offline logons are enabled. "));
2383 DEBUGADD(0,("Changing passwords here would risk inconsistent logons\n"));
2384 result = NT_STATUS_ACCESS_DENIED;
2385 goto done;
2386 }
2387
2388 if (*state->request->data.chng_pswd_auth_crap.domain) {
2389 fstrcpy(domain,state->request->data.chng_pswd_auth_crap.domain);
2390 } else {
2391 parse_domain_user(state->request->data.chng_pswd_auth_crap.user,
2392 domain, user);
2393
2394 if(!*domain) {
2395 DEBUG(3,("no domain specified with username (%s) - "
2396 "failing auth\n",
2397 state->request->data.chng_pswd_auth_crap.user));
2398 result = NT_STATUS_NO_SUCH_USER;
2399 goto done;
2400 }
2401 }
2402
2403 if (!*domain && lp_winbind_use_default_domain()) {
2404 fstrcpy(domain,lp_workgroup());
2405 }
2406
2407 if(!*user) {
2408 fstrcpy(user, state->request->data.chng_pswd_auth_crap.user);
2409 }
2410
2411 DEBUG(3, ("[%5lu]: pam auth crap domain: %s user: %s\n",
2412 (unsigned long)state->pid, domain, user));
2413
2414 /* Change password */
2415 new_nt_password = data_blob_const(
2416 state->request->data.chng_pswd_auth_crap.new_nt_pswd,
2417 state->request->data.chng_pswd_auth_crap.new_nt_pswd_len);
2418
2419 old_nt_hash_enc = data_blob_const(
2420 state->request->data.chng_pswd_auth_crap.old_nt_hash_enc,
2421 state->request->data.chng_pswd_auth_crap.old_nt_hash_enc_len);
2422
2423 if(state->request->data.chng_pswd_auth_crap.new_lm_pswd_len > 0) {
2424 new_lm_password = data_blob_const(
2425 state->request->data.chng_pswd_auth_crap.new_lm_pswd,
2426 state->request->data.chng_pswd_auth_crap.new_lm_pswd_len);
2427
2428 old_lm_hash_enc = data_blob_const(
2429 state->request->data.chng_pswd_auth_crap.old_lm_hash_enc,
2430 state->request->data.chng_pswd_auth_crap.old_lm_hash_enc_len);
2431 } else {
2432 new_lm_password = data_blob_null;
2433 old_lm_hash_enc = data_blob_null;
2434 }
2435
2436 /* Get sam handle */
2437
2438 result = cm_connect_sam(contact_domain, state->mem_ctx, true, &cli, &dom_pol);
2439 if (!NT_STATUS_IS_OK(result)) {
2440 DEBUG(1, ("could not get SAM handle on DC for %s\n", domain));
2441 goto done;
2442 }
2443
2444 b = cli->binding_handle;
2445
2446 result = rpccli_samr_chng_pswd_auth_crap(
2447 cli, state->mem_ctx, user, new_nt_password, old_nt_hash_enc,
2448 new_lm_password, old_lm_hash_enc);
2449
2450 done:
2451
2452 if (strequal(contact_domain->name, get_global_sam_name())) {
2453 /* FIXME: internal rpc pipe does not cache handles yet */
2454 if (b) {
2455 if (is_valid_policy_hnd(&dom_pol)) {
2456 NTSTATUS _result;
2457 dcerpc_samr_Close(b, state->mem_ctx, &dom_pol, &_result);
2458 }
2459 TALLOC_FREE(cli);
2460 }
2461 }
2462
2463 set_auth_errors(state->response, result);
2464
2465 DEBUG(NT_STATUS_IS_OK(result) ? 5 : 2,
2466 ("Password change for user [%s]\\[%s] returned %s (PAM: %d)\n",
2467 domain, user,
2468 state->response->data.auth.nt_status_string,
2469 state->response->data.auth.pam_error));
2470
2471 return NT_STATUS_IS_OK(result) ? WINBINDD_OK : WINBINDD_ERROR;
2472 }
2473
2474 #ifdef HAVE_KRB5
2475 static NTSTATUS extract_pac_vrfy_sigs(TALLOC_CTX *mem_ctx, DATA_BLOB pac_blob,
2476 struct PAC_LOGON_INFO **logon_info)
2477 {
2478 krb5_context krbctx = NULL;
2479 krb5_error_code k5ret;
2480 krb5_keytab keytab;
2481 krb5_kt_cursor cursor;
2482 krb5_keytab_entry entry;
2483 NTSTATUS status = NT_STATUS_UNSUCCESSFUL;
2484
2485 ZERO_STRUCT(entry);
2486 ZERO_STRUCT(cursor);
2487
2488 k5ret = krb5_init_context(&krbctx);
2489 if (k5ret) {
2490 DEBUG(1, ("Failed to initialize kerberos context: %s\n",
2491 error_message(k5ret)));
2492 status = krb5_to_nt_status(k5ret);
2493 goto out;
2494 }
2495
2496 k5ret = gse_krb5_get_server_keytab(krbctx, &keytab);
2497 if (k5ret) {
2498 DEBUG(1, ("Failed to get keytab: %s\n",
2499 error_message(k5ret)));
2500 status = krb5_to_nt_status(k5ret);
2501 goto out_free;
2502 }
2503
2504 k5ret = krb5_kt_start_seq_get(krbctx, keytab, &cursor);
2505 if (k5ret) {
2506 DEBUG(1, ("Failed to start seq: %s\n",
2507 error_message(k5ret)));
2508 status = krb5_to_nt_status(k5ret);
2509 goto out_keytab;
2510 }
2511
2512 k5ret = krb5_kt_next_entry(krbctx, keytab, &entry, &cursor);
2513 while (k5ret == 0) {
2514 status = kerberos_pac_logon_info(mem_ctx, pac_blob,
2515 krbctx, NULL,
2516 KRB5_KT_KEY(&entry), NULL, 0,
2517 logon_info);
2518 if (NT_STATUS_IS_OK(status)) {
2519 break;
2520 }
2521 k5ret = smb_krb5_kt_free_entry(krbctx, &entry);
2522 k5ret = krb5_kt_next_entry(krbctx, keytab, &entry, &cursor);
2523 }
2524
2525 k5ret = krb5_kt_end_seq_get(krbctx, keytab, &cursor);
2526 if (k5ret) {
2527 DEBUG(1, ("Failed to end seq: %s\n",
2528 error_message(k5ret)));
2529 }
2530 out_keytab:
2531 k5ret = krb5_kt_close(krbctx, keytab);
2532 if (k5ret) {
2533 DEBUG(1, ("Failed to close keytab: %s\n",
2534 error_message(k5ret)));
2535 }
2536 out_free:
2537 krb5_free_context(krbctx);
2538 out:
2539 return status;
2540 }
2541
2542 NTSTATUS winbindd_pam_auth_pac_send(struct winbindd_cli_state *state,
2543 struct netr_SamInfo3 **info3)
2544 {
2545 struct winbindd_request *req = state->request;
2546 DATA_BLOB pac_blob;
2547 struct PAC_LOGON_INFO *logon_info = NULL;
2548 struct netr_SamInfo3 *info3_copy = NULL;
2549 NTSTATUS result;
2550
2551 pac_blob = data_blob_const(req->extra_data.data, req->extra_len);
2552 result = extract_pac_vrfy_sigs(state->mem_ctx, pac_blob, &logon_info);
2553 if (!NT_STATUS_IS_OK(result) &&
2554 !NT_STATUS_EQUAL(result, NT_STATUS_ACCESS_DENIED)) {
2555 DEBUG(1, ("Error during PAC signature verification: %s\n",
2556 nt_errstr(result)));
2557 return result;
2558 }
2559
2560 if (logon_info) {
2561 /* Signature verification succeeded, trust the PAC */
2562 result = create_info3_from_pac_logon_info(state->mem_ctx,
2563 logon_info,
2564 &info3_copy);
2565 if (!NT_STATUS_IS_OK(result)) {
2566 return result;
2567 }
2568 netsamlogon_cache_store(NULL, info3_copy);
2569
2570 } else {
2571 /* Try without signature verification */
2572 result = kerberos_pac_logon_info(state->mem_ctx, pac_blob, NULL,
2573 NULL, NULL, NULL, 0,
2574 &logon_info);
2575 if (!NT_STATUS_IS_OK(result)) {
2576 DEBUG(10, ("Could not extract PAC: %s\n",
2577 nt_errstr(result)));
2578 return result;
2579 }
2580 if (logon_info) {
2581 /*
2582 * Don't strictly need to copy here,
2583 * but it makes it explicit we're
2584 * returning a copy talloc'ed off
2585 * the state->mem_ctx.
2586 */
2587 info3_copy = copy_netr_SamInfo3(state->mem_ctx,
2588 &logon_info->info3);
2589 if (info3_copy == NULL) {
2590 return NT_STATUS_NO_MEMORY;
2591 }
2592 }
2593 }
2594
2595 *info3 = info3_copy;
2596
2597 return NT_STATUS_OK;
2598 }
2599 #else /* HAVE_KRB5 */
2600 NTSTATUS winbindd_pam_auth_pac_send(struct winbindd_cli_state *state,
2601 struct netr_SamInfo3 **info3)
2602 {
2603 return NT_STATUS_NO_SUCH_USER;
2604 }
2605 #endif /* HAVE_KRB5 */
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