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r22135: Check in most of Michael Adam's net conf utility. A good share of this patch
[Samba/bb.git] / source3 / auth / auth_util.c
blob0de3bf23252f7fe0721a598f9774ec6f09c6f33a
1 /*
2 Unix SMB/CIFS implementation.
3 Authentication utility functions
4 Copyright (C) Andrew Tridgell 1992-1998
5 Copyright (C) Andrew Bartlett 2001
6 Copyright (C) Jeremy Allison 2000-2001
7 Copyright (C) Rafal Szczesniak 2002
8 Copyright (C) Volker Lendecke 2006
9
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 2 of the License, or
13 (at your option) any later version.
14
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
19
20 You should have received a copy of the GNU General Public License
21 along with this program; if not, write to the Free Software
22 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23 */
24
25 #include "includes.h"
26
27 #undef DBGC_CLASS
28 #define DBGC_CLASS DBGC_AUTH
29
30 /****************************************************************************
31 Create a UNIX user on demand.
32 ****************************************************************************/
33
34 static int smb_create_user(const char *domain, const char *unix_username, const char *homedir)
35 {
36 pstring add_script;
37 int ret;
38
39 pstrcpy(add_script, lp_adduser_script());
40 if (! *add_script)
41 return -1;
42 all_string_sub(add_script, "%u", unix_username, sizeof(pstring));
43 if (domain)
44 all_string_sub(add_script, "%D", domain, sizeof(pstring));
45 if (homedir)
46 all_string_sub(add_script, "%H", homedir, sizeof(pstring));
47 ret = smbrun(add_script,NULL);
48 flush_pwnam_cache();
49 DEBUG(ret ? 0 : 3,("smb_create_user: Running the command `%s' gave %d\n",add_script,ret));
50 return ret;
51 }
52
53 /****************************************************************************
54 Create an auth_usersupplied_data structure
55 ****************************************************************************/
56
57 static NTSTATUS make_user_info(auth_usersupplied_info **user_info,
58 const char *smb_name,
59 const char *internal_username,
60 const char *client_domain,
61 const char *domain,
62 const char *wksta_name,
63 DATA_BLOB *lm_pwd, DATA_BLOB *nt_pwd,
64 DATA_BLOB *lm_interactive_pwd, DATA_BLOB *nt_interactive_pwd,
65 DATA_BLOB *plaintext,
66 BOOL encrypted)
67 {
68
69 DEBUG(5,("attempting to make a user_info for %s (%s)\n", internal_username, smb_name));
70
71 *user_info = SMB_MALLOC_P(auth_usersupplied_info);
72 if (*user_info == NULL) {
73 DEBUG(0,("malloc failed for user_info (size %lu)\n", (unsigned long)sizeof(*user_info)));
74 return NT_STATUS_NO_MEMORY;
75 }
76
77 ZERO_STRUCTP(*user_info);
78
79 DEBUG(5,("making strings for %s's user_info struct\n", internal_username));
80
81 (*user_info)->smb_name = SMB_STRDUP(smb_name);
82 if ((*user_info)->smb_name == NULL) {
83 free_user_info(user_info);
84 return NT_STATUS_NO_MEMORY;
85 }
86
87 (*user_info)->internal_username = SMB_STRDUP(internal_username);
88 if ((*user_info)->internal_username == NULL) {
89 free_user_info(user_info);
90 return NT_STATUS_NO_MEMORY;
91 }
92
93 (*user_info)->domain = SMB_STRDUP(domain);
94 if ((*user_info)->domain == NULL) {
95 free_user_info(user_info);
96 return NT_STATUS_NO_MEMORY;
97 }
98
99 (*user_info)->client_domain = SMB_STRDUP(client_domain);
100 if ((*user_info)->client_domain == NULL) {
101 free_user_info(user_info);
102 return NT_STATUS_NO_MEMORY;
103 }
104
105 (*user_info)->wksta_name = SMB_STRDUP(wksta_name);
106 if ((*user_info)->wksta_name == NULL) {
107 free_user_info(user_info);
108 return NT_STATUS_NO_MEMORY;
109 }
110
111 DEBUG(5,("making blobs for %s's user_info struct\n", internal_username));
112
113 if (lm_pwd)
114 (*user_info)->lm_resp = data_blob(lm_pwd->data, lm_pwd->length);
115 if (nt_pwd)
116 (*user_info)->nt_resp = data_blob(nt_pwd->data, nt_pwd->length);
117 if (lm_interactive_pwd)
118 (*user_info)->lm_interactive_pwd = data_blob(lm_interactive_pwd->data, lm_interactive_pwd->length);
119 if (nt_interactive_pwd)
120 (*user_info)->nt_interactive_pwd = data_blob(nt_interactive_pwd->data, nt_interactive_pwd->length);
121
122 if (plaintext)
123 (*user_info)->plaintext_password = data_blob(plaintext->data, plaintext->length);
124
125 (*user_info)->encrypted = encrypted;
126
127 (*user_info)->logon_parameters = 0;
128
129 DEBUG(10,("made an %sencrypted user_info for %s (%s)\n", encrypted ? "":"un" , internal_username, smb_name));
130
131 return NT_STATUS_OK;
132 }
133
134 /****************************************************************************
135 Create an auth_usersupplied_data structure after appropriate mapping.
136 ****************************************************************************/
137
138 NTSTATUS make_user_info_map(auth_usersupplied_info **user_info,
139 const char *smb_name,
140 const char *client_domain,
141 const char *wksta_name,
142 DATA_BLOB *lm_pwd, DATA_BLOB *nt_pwd,
143 DATA_BLOB *lm_interactive_pwd, DATA_BLOB *nt_interactive_pwd,
144 DATA_BLOB *plaintext,
145 BOOL encrypted)
146 {
147 const char *domain;
148 NTSTATUS result;
149 BOOL was_mapped;
150 fstring internal_username;
151 fstrcpy(internal_username, smb_name);
152 was_mapped = map_username(internal_username);
153
154 DEBUG(5, ("make_user_info_map: Mapping user [%s]\\[%s] from workstation [%s]\n",
155 client_domain, smb_name, wksta_name));
156
157 /* don't allow "" as a domain, fixes a Win9X bug
158 where it doens't supply a domain for logon script
159 'net use' commands. */
160
161 if ( *client_domain )
162 domain = client_domain;
163 else
164 domain = lp_workgroup();
165
166 /* do what win2k does. Always map unknown domains to our own
167 and let the "passdb backend" handle unknown users. */
168
169 if ( !is_trusted_domain(domain) && !strequal(domain, get_global_sam_name()) )
170 domain = my_sam_name();
171
172 /* we know that it is a trusted domain (and we are allowing them) or it is our domain */
173
174 result = make_user_info(user_info, smb_name, internal_username,
175 client_domain, domain, wksta_name,
176 lm_pwd, nt_pwd,
177 lm_interactive_pwd, nt_interactive_pwd,
178 plaintext, encrypted);
179 if (NT_STATUS_IS_OK(result)) {
180 (*user_info)->was_mapped = was_mapped;
181 }
182 return result;
183 }
184
185 /****************************************************************************
186 Create an auth_usersupplied_data, making the DATA_BLOBs here.
187 Decrypt and encrypt the passwords.
188 ****************************************************************************/
189
190 BOOL make_user_info_netlogon_network(auth_usersupplied_info **user_info,
191 const char *smb_name,
192 const char *client_domain,
193 const char *wksta_name,
194 uint32 logon_parameters,
195 const uchar *lm_network_pwd,
196 int lm_pwd_len,
197 const uchar *nt_network_pwd,
198 int nt_pwd_len)
199 {
200 BOOL ret;
201 NTSTATUS status;
202 DATA_BLOB lm_blob = data_blob(lm_network_pwd, lm_pwd_len);
203 DATA_BLOB nt_blob = data_blob(nt_network_pwd, nt_pwd_len);
204
205 status = make_user_info_map(user_info,
206 smb_name, client_domain,
207 wksta_name,
208 lm_pwd_len ? &lm_blob : NULL,
209 nt_pwd_len ? &nt_blob : NULL,
210 NULL, NULL, NULL,
211 True);
212
213 if (NT_STATUS_IS_OK(status)) {
214 (*user_info)->logon_parameters = logon_parameters;
215 }
216 ret = NT_STATUS_IS_OK(status) ? True : False;
217
218 data_blob_free(&lm_blob);
219 data_blob_free(&nt_blob);
220 return ret;
221 }
222
223 /****************************************************************************
224 Create an auth_usersupplied_data, making the DATA_BLOBs here.
225 Decrypt and encrypt the passwords.
226 ****************************************************************************/
227
228 BOOL make_user_info_netlogon_interactive(auth_usersupplied_info **user_info,
229 const char *smb_name,
230 const char *client_domain,
231 const char *wksta_name,
232 uint32 logon_parameters,
233 const uchar chal[8],
234 const uchar lm_interactive_pwd[16],
235 const uchar nt_interactive_pwd[16],
236 const uchar *dc_sess_key)
237 {
238 unsigned char lm_pwd[16];
239 unsigned char nt_pwd[16];
240 unsigned char local_lm_response[24];
241 unsigned char local_nt_response[24];
242 unsigned char key[16];
243
244 ZERO_STRUCT(key);
245 memcpy(key, dc_sess_key, 8);
246
247 if (lm_interactive_pwd)
248 memcpy(lm_pwd, lm_interactive_pwd, sizeof(lm_pwd));
249
250 if (nt_interactive_pwd)
251 memcpy(nt_pwd, nt_interactive_pwd, sizeof(nt_pwd));
252
253 #ifdef DEBUG_PASSWORD
254 DEBUG(100,("key:"));
255 dump_data(100, key, sizeof(key));
256
257 DEBUG(100,("lm owf password:"));
258 dump_data(100, lm_pwd, sizeof(lm_pwd));
259
260 DEBUG(100,("nt owf password:"));
261 dump_data(100, nt_pwd, sizeof(nt_pwd));
262 #endif
263
264 if (lm_interactive_pwd)
265 SamOEMhash(lm_pwd, key, sizeof(lm_pwd));
266
267 if (nt_interactive_pwd)
268 SamOEMhash(nt_pwd, key, sizeof(nt_pwd));
269
270 #ifdef DEBUG_PASSWORD
271 DEBUG(100,("decrypt of lm owf password:"));
272 dump_data(100, lm_pwd, sizeof(lm_pwd));
273
274 DEBUG(100,("decrypt of nt owf password:"));
275 dump_data(100, nt_pwd, sizeof(nt_pwd));
276 #endif
277
278 if (lm_interactive_pwd)
279 SMBOWFencrypt(lm_pwd, chal,
280 local_lm_response);
281
282 if (nt_interactive_pwd)
283 SMBOWFencrypt(nt_pwd, chal,
284 local_nt_response);
285
286 /* Password info paranoia */
287 ZERO_STRUCT(key);
288
289 {
290 BOOL ret;
291 NTSTATUS nt_status;
292 DATA_BLOB local_lm_blob;
293 DATA_BLOB local_nt_blob;
294
295 DATA_BLOB lm_interactive_blob;
296 DATA_BLOB nt_interactive_blob;
297
298 if (lm_interactive_pwd) {
299 local_lm_blob = data_blob(local_lm_response,
300 sizeof(local_lm_response));
301 lm_interactive_blob = data_blob(lm_pwd,
302 sizeof(lm_pwd));
303 ZERO_STRUCT(lm_pwd);
304 }
305
306 if (nt_interactive_pwd) {
307 local_nt_blob = data_blob(local_nt_response,
308 sizeof(local_nt_response));
309 nt_interactive_blob = data_blob(nt_pwd,
310 sizeof(nt_pwd));
311 ZERO_STRUCT(nt_pwd);
312 }
313
314 nt_status = make_user_info_map(
315 user_info,
316 smb_name, client_domain, wksta_name,
317 lm_interactive_pwd ? &local_lm_blob : NULL,
318 nt_interactive_pwd ? &local_nt_blob : NULL,
319 lm_interactive_pwd ? &lm_interactive_blob : NULL,
320 nt_interactive_pwd ? &nt_interactive_blob : NULL,
321 NULL, True);
322
323 if (NT_STATUS_IS_OK(nt_status)) {
324 (*user_info)->logon_parameters = logon_parameters;
325 }
326
327 ret = NT_STATUS_IS_OK(nt_status) ? True : False;
328 data_blob_free(&local_lm_blob);
329 data_blob_free(&local_nt_blob);
330 data_blob_free(&lm_interactive_blob);
331 data_blob_free(&nt_interactive_blob);
332 return ret;
333 }
334 }
335
336
337 /****************************************************************************
338 Create an auth_usersupplied_data structure
339 ****************************************************************************/
340
341 BOOL make_user_info_for_reply(auth_usersupplied_info **user_info,
342 const char *smb_name,
343 const char *client_domain,
344 const uint8 chal[8],
345 DATA_BLOB plaintext_password)
346 {
347
348 DATA_BLOB local_lm_blob;
349 DATA_BLOB local_nt_blob;
350 NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
351
352 /*
353 * Not encrypted - do so.
354 */
355
356 DEBUG(5,("make_user_info_for_reply: User passwords not in encrypted "
357 "format.\n"));
358
359 if (plaintext_password.data) {
360 unsigned char local_lm_response[24];
361
362 #ifdef DEBUG_PASSWORD
363 DEBUG(10,("Unencrypted password (len %d):\n",
364 (int)plaintext_password.length));
365 dump_data(100, plaintext_password.data,
366 plaintext_password.length);
367 #endif
368
369 SMBencrypt( (const char *)plaintext_password.data,
370 (const uchar*)chal, local_lm_response);
371 local_lm_blob = data_blob(local_lm_response, 24);
372
373 /* We can't do an NT hash here, as the password needs to be
374 case insensitive */
375 local_nt_blob = data_blob(NULL, 0);
376
377 } else {
378 local_lm_blob = data_blob(NULL, 0);
379 local_nt_blob = data_blob(NULL, 0);
380 }
381
382 ret = make_user_info_map(
383 user_info, smb_name, client_domain,
384 get_remote_machine_name(),
385 local_lm_blob.data ? &local_lm_blob : NULL,
386 local_nt_blob.data ? &local_nt_blob : NULL,
387 NULL, NULL,
388 plaintext_password.data ? &plaintext_password : NULL,
389 False);
390
391 data_blob_free(&local_lm_blob);
392 return NT_STATUS_IS_OK(ret) ? True : False;
393 }
394
395 /****************************************************************************
396 Create an auth_usersupplied_data structure
397 ****************************************************************************/
398
399 NTSTATUS make_user_info_for_reply_enc(auth_usersupplied_info **user_info,
400 const char *smb_name,
401 const char *client_domain,
402 DATA_BLOB lm_resp, DATA_BLOB nt_resp)
403 {
404 return make_user_info_map(user_info, smb_name,
405 client_domain,
406 get_remote_machine_name(),
407 lm_resp.data ? &lm_resp : NULL,
408 nt_resp.data ? &nt_resp : NULL,
409 NULL, NULL, NULL,
410 True);
411 }
412
413 /****************************************************************************
414 Create a guest user_info blob, for anonymous authenticaion.
415 ****************************************************************************/
416
417 BOOL make_user_info_guest(auth_usersupplied_info **user_info)
418 {
419 NTSTATUS nt_status;
420
421 nt_status = make_user_info(user_info,
422 "","",
423 "","",
424 "",
425 NULL, NULL,
426 NULL, NULL,
427 NULL,
428 True);
429
430 return NT_STATUS_IS_OK(nt_status) ? True : False;
431 }
432
433 /****************************************************************************
434 prints a NT_USER_TOKEN to debug output.
435 ****************************************************************************/
436
437 void debug_nt_user_token(int dbg_class, int dbg_lev, NT_USER_TOKEN *token)
438 {
439 size_t i;
440
441 if (!token) {
442 DEBUGC(dbg_class, dbg_lev, ("NT user token: (NULL)\n"));
443 return;
444 }
445
446 DEBUGC(dbg_class, dbg_lev,
447 ("NT user token of user %s\n",
448 sid_string_static(&token->user_sids[0]) ));
449 DEBUGADDC(dbg_class, dbg_lev,
450 ("contains %lu SIDs\n", (unsigned long)token->num_sids));
451 for (i = 0; i < token->num_sids; i++)
452 DEBUGADDC(dbg_class, dbg_lev,
453 ("SID[%3lu]: %s\n", (unsigned long)i,
454 sid_string_static(&token->user_sids[i])));
455
456 dump_se_priv( dbg_class, dbg_lev, &token->privileges );
457 }
458
459 /****************************************************************************
460 prints a UNIX 'token' to debug output.
461 ****************************************************************************/
462
463 void debug_unix_user_token(int dbg_class, int dbg_lev, uid_t uid, gid_t gid,
464 int n_groups, gid_t *groups)
465 {
466 int i;
467 DEBUGC(dbg_class, dbg_lev,
468 ("UNIX token of user %ld\n", (long int)uid));
469
470 DEBUGADDC(dbg_class, dbg_lev,
471 ("Primary group is %ld and contains %i supplementary "
472 "groups\n", (long int)gid, n_groups));
473 for (i = 0; i < n_groups; i++)
474 DEBUGADDC(dbg_class, dbg_lev, ("Group[%3i]: %ld\n", i,
475 (long int)groups[i]));
476 }
477
478 static int server_info_dtor(auth_serversupplied_info *server_info)
479 {
480 TALLOC_FREE(server_info->sam_account);
481 ZERO_STRUCTP(server_info);
482 return 0;
483 }
484
485 /***************************************************************************
486 Make a server_info struct. Free with TALLOC_FREE().
487 ***************************************************************************/
488
489 static auth_serversupplied_info *make_server_info(TALLOC_CTX *mem_ctx)
490 {
491 struct auth_serversupplied_info *result;
492
493 result = TALLOC_ZERO_P(mem_ctx, auth_serversupplied_info);
494 if (result == NULL) {
495 DEBUG(0, ("talloc failed\n"));
496 return NULL;
497 }
498
499 talloc_set_destructor(result, server_info_dtor);
500
501 /* Initialise the uid and gid values to something non-zero
502 which may save us from giving away root access if there
503 is a bug in allocating these fields. */
504
505 result->uid = -1;
506 result->gid = -1;
507 return result;
508 }
509
510 /***************************************************************************
511 Make (and fill) a user_info struct from a struct samu
512 ***************************************************************************/
513
514 NTSTATUS make_server_info_sam(auth_serversupplied_info **server_info,
515 struct samu *sampass)
516 {
517 NTSTATUS status;
518 struct passwd *pwd;
519 gid_t *gids;
520 auth_serversupplied_info *result;
521 int i;
522 size_t num_gids;
523 DOM_SID unix_group_sid;
524
525
526 if ( !(result = make_server_info(NULL)) ) {
527 return NT_STATUS_NO_MEMORY;
528 }
529
530 if ( !(pwd = getpwnam_alloc(result, pdb_get_username(sampass))) ) {
531 DEBUG(1, ("User %s in passdb, but getpwnam() fails!\n",
532 pdb_get_username(sampass)));
533 TALLOC_FREE(result);
534 return NT_STATUS_NO_SUCH_USER;
535 }
536
537 result->sam_account = sampass;
538 /* Ensure thaat the sampass will be freed with the result */
539 talloc_steal(result, sampass);
540 result->unix_name = pwd->pw_name;
541 /* Ensure that we keep pwd->pw_name, because we will free pwd below */
542 talloc_steal(result, pwd->pw_name);
543 result->gid = pwd->pw_gid;
544 result->uid = pwd->pw_uid;
545
546 TALLOC_FREE(pwd);
547
548 status = pdb_enum_group_memberships(result, sampass,
549 &result->sids, &gids,
550 &result->num_sids);
551
552 if (!NT_STATUS_IS_OK(status)) {
553 DEBUG(10, ("pdb_enum_group_memberships failed: %s\n",
554 nt_errstr(status)));
555 result->sam_account = NULL; /* Don't free on error exit. */
556 TALLOC_FREE(result);
557 return status;
558 }
559
560 /* Add the "Unix Group" SID for each gid to catch mapped groups
561 and their Unix equivalent. This is to solve the backwards
562 compatibility problem of 'valid users = +ntadmin' where
563 ntadmin has been paired with "Domain Admins" in the group
564 mapping table. Otherwise smb.conf would need to be changed
565 to 'valid user = "Domain Admins"'. --jerry */
566
567 num_gids = result->num_sids;
568 for ( i=0; i<num_gids; i++ ) {
569 if ( !gid_to_unix_groups_sid( gids[i], &unix_group_sid ) ) {
570 DEBUG(1,("make_server_info_sam: Failed to create SID "
571 "for gid %d!\n", gids[i]));
572 continue;
573 }
574 if (!add_sid_to_array_unique( result, &unix_group_sid,
575 &result->sids, &result->num_sids )) {
576 result->sam_account = NULL; /* Don't free on error exit. */
577 TALLOC_FREE(result);
578 return NT_STATUS_NO_MEMORY;
579 }
580 }
581
582 /* For now we throw away the gids and convert via sid_to_gid
583 * later. This needs fixing, but I'd like to get the code straight and
584 * simple first. */
585
586 TALLOC_FREE(gids);
587
588 DEBUG(5,("make_server_info_sam: made server info for user %s -> %s\n",
589 pdb_get_username(sampass), result->unix_name));
590
591 *server_info = result;
592
593 return NT_STATUS_OK;
594 }
595
596 static NTSTATUS log_nt_token(TALLOC_CTX *tmp_ctx, NT_USER_TOKEN *token)
597 {
598 char *command;
599 char *group_sidstr;
600 size_t i;
601
602 if ((lp_log_nt_token_command() == NULL) ||
603 (strlen(lp_log_nt_token_command()) == 0)) {
604 return NT_STATUS_OK;
605 }
606
607 group_sidstr = talloc_strdup(tmp_ctx, "");
608 for (i=1; i<token->num_sids; i++) {
609 group_sidstr = talloc_asprintf(
610 tmp_ctx, "%s %s", group_sidstr,
611 sid_string_static(&token->user_sids[i]));
612 }
613
614 command = talloc_string_sub(
615 tmp_ctx, lp_log_nt_token_command(),
616 "%s", sid_string_static(&token->user_sids[0]));
617 command = talloc_string_sub(tmp_ctx, command, "%t", group_sidstr);
618
619 if (command == NULL) {
620 return NT_STATUS_NO_MEMORY;
621 }
622
623 DEBUG(8, ("running command: [%s]\n", command));
624 if (smbrun(command, NULL) != 0) {
625 DEBUG(0, ("Could not log NT token\n"));
626 return NT_STATUS_ACCESS_DENIED;
627 }
628
629 return NT_STATUS_OK;
630 }
631
632 /*
633 * Create the token to use from server_info->sam_account and
634 * server_info->sids (the info3/sam groups). Find the unix gids.
635 */
636
637 NTSTATUS create_local_token(auth_serversupplied_info *server_info)
638 {
639 TALLOC_CTX *mem_ctx;
640 struct id_map *ids;
641 NTSTATUS status;
642 BOOL wb = True;
643 size_t i;
644
645
646 mem_ctx = talloc_new(NULL);
647 if (mem_ctx == NULL) {
648 DEBUG(0, ("talloc_new failed\n"));
649 return NT_STATUS_NO_MEMORY;
650 }
651
652 /*
653 * If winbind is not around, we can not make much use of the SIDs the
654 * domain controller provided us with. Likewise if the user name was
655 * mapped to some local unix user.
656 */
657
658 if (((lp_server_role() == ROLE_DOMAIN_MEMBER) && !winbind_ping()) ||
659 (server_info->was_mapped)) {
660 status = create_token_from_username(server_info,
661 server_info->unix_name,
662 server_info->guest,
663 &server_info->uid,
664 &server_info->gid,
665 &server_info->unix_name,
666 &server_info->ptok);
667
668 } else {
669 server_info->ptok = create_local_nt_token(
670 server_info,
671 pdb_get_user_sid(server_info->sam_account),
672 server_info->guest,
673 server_info->num_sids, server_info->sids);
674 status = server_info->ptok ?
675 NT_STATUS_OK : NT_STATUS_NO_SUCH_USER;
676 }
677
678 if (!NT_STATUS_IS_OK(status)) {
679 TALLOC_FREE(mem_ctx);
680 return status;
681 }
682
683 /* Convert the SIDs to gids. */
684
685 server_info->n_groups = 0;
686 server_info->groups = NULL;
687
688 /* Start at index 1, where the groups start. */
689 ids = talloc_zero_array(mem_ctx, struct id_map, server_info->ptok->num_sids);
690 for (i = 0; i < server_info->ptok->num_sids-1; i++) {
691 ids[i].sid = &server_info->ptok->user_sids[i + 1]; /* store the sids */
692 }
693
694 if (!winbind_sids_to_unixids(ids, server_info->ptok->num_sids-1)) {
695 DEBUG(2, ("Query to map secondary SIDs failed!\n"));
696 if (!winbind_ping()) {
697 DEBUG(2, ("Winbindd is not running, will try to map SIDs one by one with legacy code\n"));
698 wb = False;
699 }
700 }
701
702 for (i = 0; i < server_info->ptok->num_sids-1; i++) {
703 gid_t agid;
704
705 if (wb) {
706 if (ids[i].status != ID_MAPPED) {
707 DEBUG(10, ("Could not convert SID %s to gid, "
708 "ignoring it\n", sid_string_static(ids[i].sid)));
709 continue;
710 }
711 if (ids[i].xid.type == ID_TYPE_UID) {
712 DEBUG(10, ("SID %s is a User ID (%u) not a Group ID, "
713 "ignoring it\n", sid_string_static(ids[i].sid), ids[i].xid.id));
714 continue;
715 }
716 agid = (gid_t)ids[i].xid.id;
717 } else {
718 if (! sid_to_gid(ids[i].sid, &agid)) {
719 continue;
720 }
721 }
722 if (!add_gid_to_array_unique(server_info, agid, &server_info->groups,
723 &server_info->n_groups)) {
724 TALLOC_FREE(mem_ctx);
725 return NT_STATUS_NO_MEMORY;
726 }
727 }
728
729 debug_nt_user_token(DBGC_AUTH, 10, server_info->ptok);
730
731 status = log_nt_token(mem_ctx, server_info->ptok);
732
733 TALLOC_FREE(mem_ctx);
734 return status;
735 }
736
737 /*
738 * Create an artificial NT token given just a username. (Initially indended
739 * for force user)
740 *
741 * We go through lookup_name() to avoid problems we had with 'winbind use
742 * default domain'.
743 *
744 * We have 3 cases:
745 *
746 * unmapped unix users: Go directly to nss to find the user's group.
747 *
748 * A passdb user: The list of groups is provided by pdb_enum_group_memberships.
749 *
750 * If the user is provided by winbind, the primary gid is set to "domain
751 * users" of the user's domain. For an explanation why this is necessary, see
752 * the thread starting at
753 * http://lists.samba.org/archive/samba-technical/2006-January/044803.html.
754 */
755
756 NTSTATUS create_token_from_username(TALLOC_CTX *mem_ctx, const char *username,
757 BOOL is_guest,
758 uid_t *uid, gid_t *gid,
759 char **found_username,
760 struct nt_user_token **token)
761 {
762 NTSTATUS result = NT_STATUS_NO_SUCH_USER;
763 TALLOC_CTX *tmp_ctx;
764 DOM_SID user_sid;
765 enum lsa_SidType type;
766 gid_t *gids;
767 DOM_SID *group_sids;
768 DOM_SID unix_group_sid;
769 size_t num_group_sids;
770 size_t num_gids;
771 size_t i;
772
773 tmp_ctx = talloc_new(NULL);
774 if (tmp_ctx == NULL) {
775 DEBUG(0, ("talloc_new failed\n"));
776 return NT_STATUS_NO_MEMORY;
777 }
778
779 if (!lookup_name_smbconf(tmp_ctx, username, LOOKUP_NAME_ALL,
780 NULL, NULL, &user_sid, &type)) {
781 DEBUG(1, ("lookup_name_smbconf for %s failed\n", username));
782 goto done;
783 }
784
785 if (type != SID_NAME_USER) {
786 DEBUG(1, ("%s is a %s, not a user\n", username,
787 sid_type_lookup(type)));
788 goto done;
789 }
790
791 if (!sid_to_uid(&user_sid, uid)) {
792 DEBUG(1, ("sid_to_uid for %s (%s) failed\n",
793 username, sid_string_static(&user_sid)));
794 goto done;
795 }
796
797 if (sid_check_is_in_our_domain(&user_sid)) {
798
799 /* This is a passdb user, so ask passdb */
800
801 struct samu *sam_acct = NULL;
802
803 if ( !(sam_acct = samu_new( tmp_ctx )) ) {
804 result = NT_STATUS_NO_MEMORY;
805 goto done;
806 }
807
808 if (!pdb_getsampwsid(sam_acct, &user_sid)) {
809 DEBUG(1, ("pdb_getsampwsid(%s) for user %s failed\n",
810 sid_string_static(&user_sid), username));
811 DEBUGADD(1, ("Fall back to unix user %s\n", username));
812 goto unix_user;
813 }
814
815 result = pdb_enum_group_memberships(tmp_ctx, sam_acct,
816 &group_sids, &gids,
817 &num_group_sids);
818 if (!NT_STATUS_IS_OK(result)) {
819 DEBUG(10, ("enum_group_memberships failed for %s\n",
820 username));
821 DEBUGADD(1, ("Fall back to unix user %s\n", username));
822 goto unix_user;
823 }
824
825 /* see the smb_panic() in pdb_default_enum_group_memberships */
826 SMB_ASSERT(num_group_sids > 0);
827
828 *gid = gids[0];
829
830 /* Ensure we're returning the found_username on the right context. */
831 *found_username = talloc_strdup(mem_ctx,
832 pdb_get_username(sam_acct));
833
834 } else if (sid_check_is_in_unix_users(&user_sid)) {
835
836 /* This is a unix user not in passdb. We need to ask nss
837 * directly, without consulting passdb */
838
839 struct passwd *pass;
840
841 /*
842 * This goto target is used as a fallback for the passdb
843 * case. The concrete bug report is when passdb gave us an
844 * unmapped gid.
845 */
846
847 unix_user:
848
849 uid_to_unix_users_sid(*uid, &user_sid);
850
851 pass = getpwuid_alloc(tmp_ctx, *uid);
852 if (pass == NULL) {
853 DEBUG(1, ("getpwuid(%d) for user %s failed\n",
854 *uid, username));
855 goto done;
856 }
857
858 if (!getgroups_unix_user(tmp_ctx, username, pass->pw_gid,
859 &gids, &num_group_sids)) {
860 DEBUG(1, ("getgroups_unix_user for user %s failed\n",
861 username));
862 goto done;
863 }
864
865 group_sids = talloc_array(tmp_ctx, DOM_SID, num_group_sids);
866 if (group_sids == NULL) {
867 DEBUG(1, ("talloc_array failed\n"));
868 result = NT_STATUS_NO_MEMORY;
869 goto done;
870 }
871
872 for (i=0; i<num_group_sids; i++) {
873 gid_to_sid(&group_sids[i], gids[i]);
874 }
875
876 /* In getgroups_unix_user we always set the primary gid */
877 SMB_ASSERT(num_group_sids > 0);
878
879 *gid = gids[0];
880
881 /* Ensure we're returning the found_username on the right context. */
882 *found_username = talloc_strdup(mem_ctx, pass->pw_name);
883 } else {
884
885 /* This user is from winbind, force the primary gid to the
886 * user's "domain users" group. Under certain circumstances
887 * (user comes from NT4), this might be a loss of
888 * information. But we can not rely on winbind getting the
889 * correct info. AD might prohibit winbind looking up that
890 * information. */
891
892 uint32 dummy;
893
894 num_group_sids = 1;
895 group_sids = talloc_array(tmp_ctx, DOM_SID, num_group_sids);
896 if (group_sids == NULL) {
897 DEBUG(1, ("talloc_array failed\n"));
898 result = NT_STATUS_NO_MEMORY;
899 goto done;
900 }
901
902 sid_copy(&group_sids[0], &user_sid);
903 sid_split_rid(&group_sids[0], &dummy);
904 sid_append_rid(&group_sids[0], DOMAIN_GROUP_RID_USERS);
905
906 if (!sid_to_gid(&group_sids[0], gid)) {
907 DEBUG(1, ("sid_to_gid(%s) failed\n",
908 sid_string_static(&group_sids[0])));
909 goto done;
910 }
911
912 gids = gid;
913
914 /* Ensure we're returning the found_username on the right context. */
915 *found_username = talloc_strdup(mem_ctx, username);
916 }
917
918 /* Add the "Unix Group" SID for each gid to catch mapped groups
919 and their Unix equivalent. This is to solve the backwards
920 compatibility problem of 'valid users = +ntadmin' where
921 ntadmin has been paired with "Domain Admins" in the group
922 mapping table. Otherwise smb.conf would need to be changed
923 to 'valid user = "Domain Admins"'. --jerry */
924
925 num_gids = num_group_sids;
926 for ( i=0; i<num_gids; i++ ) {
927 gid_t high, low;
928
929 /* don't pickup anything managed by Winbind */
930
931 if ( lp_idmap_gid(&low, &high) && (gids[i] >= low) && (gids[i] <= high) )
932 continue;
933
934 if ( !gid_to_unix_groups_sid( gids[i], &unix_group_sid ) ) {
935 DEBUG(1,("create_token_from_username: Failed to create SID "
936 "for gid %d!\n", gids[i]));
937 continue;
938 }
939 if (!add_sid_to_array_unique(tmp_ctx, &unix_group_sid,
940 &group_sids, &num_group_sids )) {
941 result = NT_STATUS_NO_MEMORY;
942 goto done;
943 }
944 }
945
946 /* Ensure we're creating the nt_token on the right context. */
947 *token = create_local_nt_token(mem_ctx, &user_sid,
948 is_guest, num_group_sids, group_sids);
949
950 if ((*token == NULL) || (*found_username == NULL)) {
951 result = NT_STATUS_NO_MEMORY;
952 goto done;
953 }
954
955 result = NT_STATUS_OK;
956 done:
957 TALLOC_FREE(tmp_ctx);
958 return result;
959 }
960
961 /***************************************************************************
962 Build upon create_token_from_username:
963
964 Expensive helper function to figure out whether a user given its name is
965 member of a particular group.
966 ***************************************************************************/
967
968 BOOL user_in_group_sid(const char *username, const DOM_SID *group_sid)
969 {
970 NTSTATUS status;
971 uid_t uid;
972 gid_t gid;
973 char *found_username;
974 struct nt_user_token *token;
975 BOOL result;
976
977 TALLOC_CTX *mem_ctx;
978
979 mem_ctx = talloc_new(NULL);
980 if (mem_ctx == NULL) {
981 DEBUG(0, ("talloc_new failed\n"));
982 return False;
983 }
984
985 status = create_token_from_username(mem_ctx, username, False,
986 &uid, &gid, &found_username,
987 &token);
988
989 if (!NT_STATUS_IS_OK(status)) {
990 DEBUG(10, ("could not create token for %s\n", username));
991 return False;
992 }
993
994 result = nt_token_check_sid(group_sid, token);
995
996 TALLOC_FREE(mem_ctx);
997 return result;
998
999 }
1000
1001 BOOL user_in_group(const char *username, const char *groupname)
1002 {
1003 TALLOC_CTX *mem_ctx;
1004 DOM_SID group_sid;
1005 BOOL ret;
1006
1007 mem_ctx = talloc_new(NULL);
1008 if (mem_ctx == NULL) {
1009 DEBUG(0, ("talloc_new failed\n"));
1010 return False;
1011 }
1012
1013 ret = lookup_name(mem_ctx, groupname, LOOKUP_NAME_ALL,
1014 NULL, NULL, &group_sid, NULL);
1015 TALLOC_FREE(mem_ctx);
1016
1017 if (!ret) {
1018 DEBUG(10, ("lookup_name for (%s) failed.\n", groupname));
1019 return False;
1020 }
1021
1022 return user_in_group_sid(username, &group_sid);
1023 }
1024
1025
1026 /***************************************************************************
1027 Make (and fill) a user_info struct from a 'struct passwd' by conversion
1028 to a struct samu
1029 ***************************************************************************/
1030
1031 NTSTATUS make_server_info_pw(auth_serversupplied_info **server_info,
1032 char *unix_username,
1033 struct passwd *pwd)
1034 {
1035 NTSTATUS status;
1036 struct samu *sampass = NULL;
1037 gid_t *gids;
1038 auth_serversupplied_info *result;
1039
1040 if ( !(sampass = samu_new( NULL )) ) {
1041 return NT_STATUS_NO_MEMORY;
1042 }
1043
1044 status = samu_set_unix( sampass, pwd );
1045 if (!NT_STATUS_IS_OK(status)) {
1046 return status;
1047 }
1048
1049 result = make_server_info(NULL);
1050 if (result == NULL) {
1051 TALLOC_FREE(sampass);
1052 return NT_STATUS_NO_MEMORY;
1053 }
1054
1055 result->sam_account = sampass;
1056 result->unix_name = talloc_strdup(result, unix_username);
1057 result->uid = pwd->pw_uid;
1058 result->gid = pwd->pw_gid;
1059
1060 status = pdb_enum_group_memberships(result, sampass,
1061 &result->sids, &gids,
1062 &result->num_sids);
1063
1064 if (!NT_STATUS_IS_OK(status)) {
1065 DEBUG(10, ("pdb_enum_group_memberships failed: %s\n",
1066 nt_errstr(status)));
1067 TALLOC_FREE(result);
1068 return status;
1069 }
1070
1071 /* For now we throw away the gids and convert via sid_to_gid
1072 * later. This needs fixing, but I'd like to get the code straight and
1073 * simple first. */
1074 TALLOC_FREE(gids);
1075
1076 *server_info = result;
1077
1078 return NT_STATUS_OK;
1079 }
1080
1081 /***************************************************************************
1082 Make (and fill) a user_info struct for a guest login.
1083 This *must* succeed for smbd to start. If there is no mapping entry for
1084 the guest gid, then create one.
1085 ***************************************************************************/
1086
1087 static NTSTATUS make_new_server_info_guest(auth_serversupplied_info **server_info)
1088 {
1089 NTSTATUS status;
1090 struct samu *sampass = NULL;
1091 DOM_SID guest_sid;
1092 BOOL ret;
1093 static const char zeros[16] = { 0, };
1094
1095 if ( !(sampass = samu_new( NULL )) ) {
1096 return NT_STATUS_NO_MEMORY;
1097 }
1098
1099 sid_copy(&guest_sid, get_global_sam_sid());
1100 sid_append_rid(&guest_sid, DOMAIN_USER_RID_GUEST);
1101
1102 become_root();
1103 ret = pdb_getsampwsid(sampass, &guest_sid);
1104 unbecome_root();
1105
1106 if (!ret) {
1107 TALLOC_FREE(sampass);
1108 return NT_STATUS_NO_SUCH_USER;
1109 }
1110
1111 status = make_server_info_sam(server_info, sampass);
1112 if (!NT_STATUS_IS_OK(status)) {
1113 TALLOC_FREE(sampass);
1114 return status;
1115 }
1116
1117 (*server_info)->guest = True;
1118
1119 status = create_local_token(*server_info);
1120 if (!NT_STATUS_IS_OK(status)) {
1121 DEBUG(10, ("create_local_token failed: %s\n",
1122 nt_errstr(status)));
1123 return status;
1124 }
1125
1126 /* annoying, but the Guest really does have a session key, and it is
1127 all zeros! */
1128 (*server_info)->user_session_key = data_blob(zeros, sizeof(zeros));
1129 (*server_info)->lm_session_key = data_blob(zeros, sizeof(zeros));
1130
1131 return NT_STATUS_OK;
1132 }
1133
1134 static auth_serversupplied_info *copy_serverinfo(auth_serversupplied_info *src)
1135 {
1136 auth_serversupplied_info *dst;
1137
1138 dst = make_server_info(NULL);
1139 if (dst == NULL) {
1140 return NULL;
1141 }
1142
1143 dst->guest = src->guest;
1144 dst->uid = src->uid;
1145 dst->gid = src->gid;
1146 dst->n_groups = src->n_groups;
1147 if (src->n_groups != 0) {
1148 dst->groups = (gid_t *)talloc_memdup(
1149 dst, src->groups, sizeof(gid_t)*dst->n_groups);
1150 } else {
1151 dst->groups = NULL;
1152 }
1153
1154 if (src->ptok) {
1155 dst->ptok = dup_nt_token(dst, src->ptok);
1156 if (!dst->ptok) {
1157 TALLOC_FREE(dst);
1158 return NULL;
1159 }
1160 }
1161
1162 dst->user_session_key = data_blob_talloc( dst, src->user_session_key.data,
1163 src->user_session_key.length);
1164
1165 dst->lm_session_key = data_blob_talloc(dst, src->lm_session_key.data,
1166 src->lm_session_key.length);
1167
1168 dst->sam_account = samu_new(NULL);
1169 if (!dst->sam_account) {
1170 TALLOC_FREE(dst);
1171 return NULL;
1172 }
1173
1174 if (!pdb_copy_sam_account(dst->sam_account, src->sam_account)) {
1175 TALLOC_FREE(dst);
1176 return NULL;
1177 }
1178
1179 dst->pam_handle = NULL;
1180 dst->unix_name = talloc_strdup(dst, src->unix_name);
1181 if (!dst->unix_name) {
1182 TALLOC_FREE(dst);
1183 return NULL;
1184 }
1185
1186 return dst;
1187 }
1188
1189 static auth_serversupplied_info *guest_info = NULL;
1190
1191 BOOL init_guest_info(void)
1192 {
1193 if (guest_info != NULL)
1194 return True;
1195
1196 return NT_STATUS_IS_OK(make_new_server_info_guest(&guest_info));
1197 }
1198
1199 NTSTATUS make_server_info_guest(auth_serversupplied_info **server_info)
1200 {
1201 *server_info = copy_serverinfo(guest_info);
1202 return (*server_info != NULL) ? NT_STATUS_OK : NT_STATUS_NO_MEMORY;
1203 }
1204
1205 BOOL copy_current_user(struct current_user *dst, struct current_user *src)
1206 {
1207 gid_t *groups;
1208 NT_USER_TOKEN *nt_token;
1209
1210 groups = (gid_t *)memdup(src->ut.groups,
1211 sizeof(gid_t) * src->ut.ngroups);
1212 if ((src->ut.ngroups != 0) && (groups == NULL)) {
1213 return False;
1214 }
1215
1216 nt_token = dup_nt_token(NULL, src->nt_user_token);
1217 if (nt_token == NULL) {
1218 SAFE_FREE(groups);
1219 return False;
1220 }
1221
1222 dst->conn = src->conn;
1223 dst->vuid = src->vuid;
1224 dst->ut.uid = src->ut.uid;
1225 dst->ut.gid = src->ut.gid;
1226 dst->ut.ngroups = src->ut.ngroups;
1227 dst->ut.groups = groups;
1228 dst->nt_user_token = nt_token;
1229 return True;
1230 }
1231
1232 BOOL set_current_user_guest(struct current_user *dst)
1233 {
1234 gid_t *groups;
1235 NT_USER_TOKEN *nt_token;
1236
1237 groups = (gid_t *)memdup(guest_info->groups,
1238 sizeof(gid_t) * guest_info->n_groups);
1239 if (groups == NULL) {
1240 return False;
1241 }
1242
1243 nt_token = dup_nt_token(NULL, guest_info->ptok);
1244 if (nt_token == NULL) {
1245 SAFE_FREE(groups);
1246 return False;
1247 }
1248
1249 TALLOC_FREE(dst->nt_user_token);
1250 SAFE_FREE(dst->ut.groups);
1251
1252 /* dst->conn is never really dereferenced, it's only tested for
1253 * equality in uid.c */
1254 dst->conn = NULL;
1255
1256 dst->vuid = UID_FIELD_INVALID;
1257 dst->ut.uid = guest_info->uid;
1258 dst->ut.gid = guest_info->gid;
1259 dst->ut.ngroups = guest_info->n_groups;
1260 dst->ut.groups = groups;
1261 dst->nt_user_token = nt_token;
1262 return True;
1263 }
1264
1265 /***************************************************************************
1266 Purely internal function for make_server_info_info3
1267 Fill the sam account from getpwnam
1268 ***************************************************************************/
1269 static NTSTATUS fill_sam_account(TALLOC_CTX *mem_ctx,
1270 const char *domain,
1271 const char *username,
1272 char **found_username,
1273 uid_t *uid, gid_t *gid,
1274 struct samu *account,
1275 BOOL *username_was_mapped)
1276 {
1277 NTSTATUS nt_status;
1278 fstring dom_user, lower_username;
1279 fstring real_username;
1280 struct passwd *passwd;
1281
1282 fstrcpy( lower_username, username );
1283 strlower_m( lower_username );
1284
1285 fstr_sprintf(dom_user, "%s%c%s", domain, *lp_winbind_separator(),
1286 lower_username);
1287
1288 /* Get the passwd struct. Try to create the account is necessary. */
1289
1290 *username_was_mapped = map_username( dom_user );
1291
1292 if ( !(passwd = smb_getpwnam( NULL, dom_user, real_username, True )) )
1293 return NT_STATUS_NO_SUCH_USER;
1294
1295 *uid = passwd->pw_uid;
1296 *gid = passwd->pw_gid;
1297
1298 /* This is pointless -- there is no suport for differing
1299 unix and windows names. Make sure to always store the
1300 one we actually looked up and succeeded. Have I mentioned
1301 why I hate the 'winbind use default domain' parameter?
1302 --jerry */
1303
1304 *found_username = talloc_strdup( mem_ctx, real_username );
1305
1306 DEBUG(5,("fill_sam_account: located username was [%s]\n", *found_username));
1307
1308 nt_status = samu_set_unix( account, passwd );
1309
1310 TALLOC_FREE(passwd);
1311
1312 return nt_status;
1313 }
1314
1315 /****************************************************************************
1316 Wrapper to allow the getpwnam() call to strip the domain name and
1317 try again in case a local UNIX user is already there. Also run through
1318 the username if we fallback to the username only.
1319 ****************************************************************************/
1320
1321 struct passwd *smb_getpwnam( TALLOC_CTX *mem_ctx, char *domuser,
1322 fstring save_username, BOOL create )
1323 {
1324 struct passwd *pw = NULL;
1325 char *p;
1326 fstring username;
1327
1328 /* we only save a copy of the username it has been mangled
1329 by winbindd use default domain */
1330
1331 save_username[0] = '\0';
1332
1333 /* don't call map_username() here since it has to be done higher
1334 up the stack so we don't call it mutliple times */
1335
1336 fstrcpy( username, domuser );
1337
1338 p = strchr_m( username, *lp_winbind_separator() );
1339
1340 /* code for a DOMAIN\user string */
1341
1342 if ( p ) {
1343 fstring strip_username;
1344
1345 pw = Get_Pwnam_alloc( mem_ctx, domuser );
1346 if ( pw ) {
1347 /* make sure we get the case of the username correct */
1348 /* work around 'winbind use default domain = yes' */
1349
1350 if ( !strchr_m( pw->pw_name, *lp_winbind_separator() ) ) {
1351 char *domain;
1352
1353 /* split the domain and username into 2 strings */
1354 *p = '\0';
1355 domain = username;
1356
1357 fstr_sprintf(save_username, "%s%c%s", domain, *lp_winbind_separator(), pw->pw_name);
1358 }
1359 else
1360 fstrcpy( save_username, pw->pw_name );
1361
1362 /* whew -- done! */
1363 return pw;
1364 }
1365
1366 /* setup for lookup of just the username */
1367 /* remember that p and username are overlapping memory */
1368
1369 p++;
1370 fstrcpy( strip_username, p );
1371 fstrcpy( username, strip_username );
1372 }
1373
1374 /* just lookup a plain username */
1375
1376 pw = Get_Pwnam_alloc(mem_ctx, username);
1377
1378 /* Create local user if requested but only if winbindd
1379 is not running. We need to protect against cases
1380 where winbindd is failing and then prematurely
1381 creating users in /etc/passwd */
1382
1383 if ( !pw && create && !winbind_ping() ) {
1384 /* Don't add a machine account. */
1385 if (username[strlen(username)-1] == '$')
1386 return NULL;
1387
1388 smb_create_user(NULL, username, NULL);
1389 pw = Get_Pwnam_alloc(mem_ctx, username);
1390 }
1391
1392 /* one last check for a valid passwd struct */
1393
1394 if ( pw )
1395 fstrcpy( save_username, pw->pw_name );
1396
1397 return pw;
1398 }
1399
1400 /***************************************************************************
1401 Make a server_info struct from the info3 returned by a domain logon
1402 ***************************************************************************/
1403
1404 NTSTATUS make_server_info_info3(TALLOC_CTX *mem_ctx,
1405 const char *sent_nt_username,
1406 const char *domain,
1407 auth_serversupplied_info **server_info,
1408 NET_USER_INFO_3 *info3)
1409 {
1410 static const char zeros[16] = { 0, };
1411
1412 NTSTATUS nt_status = NT_STATUS_OK;
1413 char *found_username;
1414 const char *nt_domain;
1415 const char *nt_username;
1416 struct samu *sam_account = NULL;
1417 DOM_SID user_sid;
1418 DOM_SID group_sid;
1419 BOOL username_was_mapped;
1420
1421 uid_t uid;
1422 gid_t gid;
1423
1424 size_t i;
1425
1426 auth_serversupplied_info *result;
1427
1428 /*
1429 Here is where we should check the list of
1430 trusted domains, and verify that the SID
1431 matches.
1432 */
1433
1434 sid_copy(&user_sid, &info3->dom_sid.sid);
1435 if (!sid_append_rid(&user_sid, info3->user_rid)) {
1436 return NT_STATUS_INVALID_PARAMETER;
1437 }
1438
1439 sid_copy(&group_sid, &info3->dom_sid.sid);
1440 if (!sid_append_rid(&group_sid, info3->group_rid)) {
1441 return NT_STATUS_INVALID_PARAMETER;
1442 }
1443
1444 if (!(nt_username = unistr2_tdup(mem_ctx, &(info3->uni_user_name)))) {
1445 /* If the server didn't give us one, just use the one we sent
1446 * them */
1447 nt_username = sent_nt_username;
1448 }
1449
1450 if (!(nt_domain = unistr2_tdup(mem_ctx, &(info3->uni_logon_dom)))) {
1451 /* If the server didn't give us one, just use the one we sent
1452 * them */
1453 nt_domain = domain;
1454 }
1455
1456 /* try to fill the SAM account.. If getpwnam() fails, then try the
1457 add user script (2.2.x behavior).
1458
1459 We use the _unmapped_ username here in an attempt to provide
1460 consistent username mapping behavior between kerberos and NTLM[SSP]
1461 authentication in domain mode security. I.E. Username mapping
1462 should be applied to the fully qualified username
1463 (e.g. DOMAIN\user) and not just the login name. Yes this means we
1464 called map_username() unnecessarily in make_user_info_map() but
1465 that is how the current code is designed. Making the change here
1466 is the least disruptive place. -- jerry */
1467
1468 if ( !(sam_account = samu_new( NULL )) ) {
1469 return NT_STATUS_NO_MEMORY;
1470 }
1471
1472 /* this call will try to create the user if necessary */
1473
1474 nt_status = fill_sam_account(mem_ctx, nt_domain, sent_nt_username,
1475 &found_username, &uid, &gid, sam_account,
1476 &username_was_mapped);
1477
1478
1479 /* if we still don't have a valid unix account check for
1480 'map to guest = bad uid' */
1481
1482 if (!NT_STATUS_IS_OK(nt_status)) {
1483 TALLOC_FREE( sam_account );
1484 if ( lp_map_to_guest() == MAP_TO_GUEST_ON_BAD_UID ) {
1485 make_server_info_guest(server_info);
1486 return NT_STATUS_OK;
1487 }
1488 return nt_status;
1489 }
1490
1491 if (!pdb_set_nt_username(sam_account, nt_username, PDB_CHANGED)) {
1492 TALLOC_FREE(sam_account);
1493 return NT_STATUS_NO_MEMORY;
1494 }
1495
1496 if (!pdb_set_username(sam_account, nt_username, PDB_CHANGED)) {
1497 TALLOC_FREE(sam_account);
1498 return NT_STATUS_NO_MEMORY;
1499 }
1500
1501 if (!pdb_set_domain(sam_account, nt_domain, PDB_CHANGED)) {
1502 TALLOC_FREE(sam_account);
1503 return NT_STATUS_NO_MEMORY;
1504 }
1505
1506 if (!pdb_set_user_sid(sam_account, &user_sid, PDB_CHANGED)) {
1507 TALLOC_FREE(sam_account);
1508 return NT_STATUS_UNSUCCESSFUL;
1509 }
1510
1511 if (!pdb_set_group_sid(sam_account, &group_sid, PDB_CHANGED)) {
1512 TALLOC_FREE(sam_account);
1513 return NT_STATUS_UNSUCCESSFUL;
1514 }
1515
1516 if (!pdb_set_fullname(sam_account,
1517 unistr2_static(&(info3->uni_full_name)),
1518 PDB_CHANGED)) {
1519 TALLOC_FREE(sam_account);
1520 return NT_STATUS_NO_MEMORY;
1521 }
1522
1523 if (!pdb_set_logon_script(sam_account,
1524 unistr2_static(&(info3->uni_logon_script)),
1525 PDB_CHANGED)) {
1526 TALLOC_FREE(sam_account);
1527 return NT_STATUS_NO_MEMORY;
1528 }
1529
1530 if (!pdb_set_profile_path(sam_account,
1531 unistr2_static(&(info3->uni_profile_path)),
1532 PDB_CHANGED)) {
1533 TALLOC_FREE(sam_account);
1534 return NT_STATUS_NO_MEMORY;
1535 }
1536
1537 if (!pdb_set_homedir(sam_account,
1538 unistr2_static(&(info3->uni_home_dir)),
1539 PDB_CHANGED)) {
1540 TALLOC_FREE(sam_account);
1541 return NT_STATUS_NO_MEMORY;
1542 }
1543
1544 if (!pdb_set_dir_drive(sam_account,
1545 unistr2_static(&(info3->uni_dir_drive)),
1546 PDB_CHANGED)) {
1547 TALLOC_FREE(sam_account);
1548 return NT_STATUS_NO_MEMORY;
1549 }
1550
1551 if (!pdb_set_acct_ctrl(sam_account, info3->acct_flags, PDB_CHANGED)) {
1552 TALLOC_FREE(sam_account);
1553 return NT_STATUS_NO_MEMORY;
1554 }
1555
1556 result = make_server_info(NULL);
1557 if (result == NULL) {
1558 DEBUG(4, ("make_server_info failed!\n"));
1559 TALLOC_FREE(sam_account);
1560 return NT_STATUS_NO_MEMORY;
1561 }
1562
1563 /* save this here to _net_sam_logon() doesn't fail (it assumes a
1564 valid struct samu) */
1565
1566 result->sam_account = sam_account;
1567 result->unix_name = talloc_strdup(result, found_username);
1568
1569 /* Fill in the unix info we found on the way */
1570
1571 result->uid = uid;
1572 result->gid = gid;
1573
1574 /* Create a 'combined' list of all SIDs we might want in the SD */
1575
1576 result->num_sids = 0;
1577 result->sids = NULL;
1578
1579 /* and create (by appending rids) the 'domain' sids */
1580
1581 for (i = 0; i < info3->num_groups2; i++) {
1582 DOM_SID sid;
1583 if (!sid_compose(&sid, &info3->dom_sid.sid,
1584 info3->gids[i].g_rid)) {
1585 DEBUG(3,("could not append additional group rid "
1586 "0x%x\n", info3->gids[i].g_rid));
1587 TALLOC_FREE(result);
1588 return NT_STATUS_INVALID_PARAMETER;
1589 }
1590 if (!add_sid_to_array(result, &sid, &result->sids,
1591 &result->num_sids)) {
1592 TALLOC_FREE(result);
1593 return NT_STATUS_NO_MEMORY;
1594 }
1595 }
1596
1597 /* Copy 'other' sids. We need to do sid filtering here to
1598 prevent possible elevation of privileges. See:
1599
1600 http://www.microsoft.com/windows2000/techinfo/administration/security/sidfilter.asp
1601 */
1602
1603 for (i = 0; i < info3->num_other_sids; i++) {
1604 if (!add_sid_to_array(result, &info3->other_sids[i].sid,
1605 &result->sids,
1606 &result->num_sids)) {
1607 TALLOC_FREE(result);
1608 return NT_STATUS_NO_MEMORY;
1609 }
1610 }
1611
1612 result->login_server = unistr2_tdup(result,
1613 &(info3->uni_logon_srv));
1614
1615 /* ensure we are never given NULL session keys */
1616
1617 if (memcmp(info3->user_sess_key, zeros, sizeof(zeros)) == 0) {
1618 result->user_session_key = data_blob(NULL, 0);
1619 } else {
1620 result->user_session_key = data_blob_talloc(
1621 result, info3->user_sess_key,
1622 sizeof(info3->user_sess_key));
1623 }
1624
1625 if (memcmp(info3->lm_sess_key, zeros, 8) == 0) {
1626 result->lm_session_key = data_blob(NULL, 0);
1627 } else {
1628 result->lm_session_key = data_blob_talloc(
1629 result, info3->lm_sess_key,
1630 sizeof(info3->lm_sess_key));
1631 }
1632
1633 result->was_mapped = username_was_mapped;
1634
1635 *server_info = result;
1636
1637 return NT_STATUS_OK;
1638 }
1639
1640 /***************************************************************************
1641 Free a user_info struct
1642 ***************************************************************************/
1643
1644 void free_user_info(auth_usersupplied_info **user_info)
1645 {
1646 DEBUG(5,("attempting to free (and zero) a user_info structure\n"));
1647 if (*user_info != NULL) {
1648 if ((*user_info)->smb_name) {
1649 DEBUG(10,("structure was created for %s\n",
1650 (*user_info)->smb_name));
1651 }
1652 SAFE_FREE((*user_info)->smb_name);
1653 SAFE_FREE((*user_info)->internal_username);
1654 SAFE_FREE((*user_info)->client_domain);
1655 SAFE_FREE((*user_info)->domain);
1656 SAFE_FREE((*user_info)->wksta_name);
1657 data_blob_free(&(*user_info)->lm_resp);
1658 data_blob_free(&(*user_info)->nt_resp);
1659 data_blob_clear_free(&(*user_info)->lm_interactive_pwd);
1660 data_blob_clear_free(&(*user_info)->nt_interactive_pwd);
1661 data_blob_clear_free(&(*user_info)->plaintext_password);
1662 ZERO_STRUCT(**user_info);
1663 }
1664 SAFE_FREE(*user_info);
1665 }
1666
1667 /***************************************************************************
1668 Make an auth_methods struct
1669 ***************************************************************************/
1670
1671 BOOL make_auth_methods(struct auth_context *auth_context, auth_methods **auth_method)
1672 {
1673 if (!auth_context) {
1674 smb_panic("no auth_context supplied to "
1675 "make_auth_methods()!\n");
1676 }
1677
1678 if (!auth_method) {
1679 smb_panic("make_auth_methods: pointer to auth_method pointer "
1680 "is NULL!\n");
1681 }
1682
1683 *auth_method = TALLOC_P(auth_context->mem_ctx, auth_methods);
1684 if (!*auth_method) {
1685 DEBUG(0,("make_auth_method: malloc failed!\n"));
1686 return False;
1687 }
1688 ZERO_STRUCTP(*auth_method);
1689
1690 return True;
1691 }
1692
1693 /**
1694 * Verify whether or not given domain is trusted.
1695 *
1696 * @param domain_name name of the domain to be verified
1697 * @return true if domain is one of the trusted once or
1698 * false if otherwise
1699 **/
1700
1701 BOOL is_trusted_domain(const char* dom_name)
1702 {
1703 DOM_SID trustdom_sid;
1704 BOOL ret;
1705
1706 /* no trusted domains for a standalone server */
1707
1708 if ( lp_server_role() == ROLE_STANDALONE )
1709 return False;
1710
1711 /* if we are a DC, then check for a direct trust relationships */
1712
1713 if ( IS_DC ) {
1714 become_root();
1715 DEBUG (5,("is_trusted_domain: Checking for domain trust with "
1716 "[%s]\n", dom_name ));
1717 ret = pdb_get_trusteddom_pw(dom_name, NULL, NULL, NULL);
1718 unbecome_root();
1719 if (ret)
1720 return True;
1721 }
1722 else {
1723 NSS_STATUS result;
1724
1725 /* If winbind is around, ask it */
1726
1727 result = wb_is_trusted_domain(dom_name);
1728
1729 if (result == NSS_STATUS_SUCCESS) {
1730 return True;
1731 }
1732
1733 if (result == NSS_STATUS_NOTFOUND) {
1734 /* winbind could not find the domain */
1735 return False;
1736 }
1737
1738 /* The only other possible result is that winbind is not up
1739 and running. We need to update the trustdom_cache
1740 ourselves */
1741
1742 update_trustdom_cache();
1743 }
1744
1745 /* now the trustdom cache should be available a DC could still
1746 * have a transitive trust so fall back to the cache of trusted
1747 * domains (like a domain member would use */
1748
1749 if ( trustdom_cache_fetch(dom_name, &trustdom_sid) ) {
1750 return True;
1751 }
1752
1753 return False;
1754 }
1755