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r16472: final pass for 3.0.23rc3 I think. Current with SAMBA_3_0 r16471
[Samba.git] / source / auth / auth_util.c
blob0401e02b7d4c891067c37c454ed8aa3d95d76eff
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 static struct nt_user_token *create_local_nt_token(TALLOC_CTX *mem_ctx,
31 const DOM_SID *user_sid,
32 const DOM_SID *group_sid,
33 BOOL is_guest,
34 int num_groupsids,
35 const DOM_SID *groupsids);
36
37 /****************************************************************************
38 Create a UNIX user on demand.
39 ****************************************************************************/
40
41 static int smb_create_user(const char *domain, const char *unix_username, const char *homedir)
42 {
43 pstring add_script;
44 int ret;
45
46 pstrcpy(add_script, lp_adduser_script());
47 if (! *add_script)
48 return -1;
49 all_string_sub(add_script, "%u", unix_username, sizeof(pstring));
50 if (domain)
51 all_string_sub(add_script, "%D", domain, sizeof(pstring));
52 if (homedir)
53 all_string_sub(add_script, "%H", homedir, sizeof(pstring));
54 ret = smbrun(add_script,NULL);
55 flush_pwnam_cache();
56 DEBUG(ret ? 0 : 3,("smb_create_user: Running the command `%s' gave %d\n",add_script,ret));
57 return ret;
58 }
59
60 /****************************************************************************
61 Create an auth_usersupplied_data structure
62 ****************************************************************************/
63
64 static NTSTATUS make_user_info(auth_usersupplied_info **user_info,
65 const char *smb_name,
66 const char *internal_username,
67 const char *client_domain,
68 const char *domain,
69 const char *wksta_name,
70 DATA_BLOB *lm_pwd, DATA_BLOB *nt_pwd,
71 DATA_BLOB *lm_interactive_pwd, DATA_BLOB *nt_interactive_pwd,
72 DATA_BLOB *plaintext,
73 BOOL encrypted)
74 {
75
76 DEBUG(5,("attempting to make a user_info for %s (%s)\n", internal_username, smb_name));
77
78 *user_info = SMB_MALLOC_P(auth_usersupplied_info);
79 if (*user_info == NULL) {
80 DEBUG(0,("malloc failed for user_info (size %lu)\n", (unsigned long)sizeof(*user_info)));
81 return NT_STATUS_NO_MEMORY;
82 }
83
84 ZERO_STRUCTP(*user_info);
85
86 DEBUG(5,("making strings for %s's user_info struct\n", internal_username));
87
88 (*user_info)->smb_name = SMB_STRDUP(smb_name);
89 if ((*user_info)->smb_name == NULL) {
90 free_user_info(user_info);
91 return NT_STATUS_NO_MEMORY;
92 }
93
94 (*user_info)->internal_username = SMB_STRDUP(internal_username);
95 if ((*user_info)->internal_username == NULL) {
96 free_user_info(user_info);
97 return NT_STATUS_NO_MEMORY;
98 }
99
100 (*user_info)->domain = SMB_STRDUP(domain);
101 if ((*user_info)->domain == NULL) {
102 free_user_info(user_info);
103 return NT_STATUS_NO_MEMORY;
104 }
105
106 (*user_info)->client_domain = SMB_STRDUP(client_domain);
107 if ((*user_info)->client_domain == NULL) {
108 free_user_info(user_info);
109 return NT_STATUS_NO_MEMORY;
110 }
111
112 (*user_info)->wksta_name = SMB_STRDUP(wksta_name);
113 if ((*user_info)->wksta_name == NULL) {
114 free_user_info(user_info);
115 return NT_STATUS_NO_MEMORY;
116 }
117
118 DEBUG(5,("making blobs for %s's user_info struct\n", internal_username));
119
120 if (lm_pwd)
121 (*user_info)->lm_resp = data_blob(lm_pwd->data, lm_pwd->length);
122 if (nt_pwd)
123 (*user_info)->nt_resp = data_blob(nt_pwd->data, nt_pwd->length);
124 if (lm_interactive_pwd)
125 (*user_info)->lm_interactive_pwd = data_blob(lm_interactive_pwd->data, lm_interactive_pwd->length);
126 if (nt_interactive_pwd)
127 (*user_info)->nt_interactive_pwd = data_blob(nt_interactive_pwd->data, nt_interactive_pwd->length);
128
129 if (plaintext)
130 (*user_info)->plaintext_password = data_blob(plaintext->data, plaintext->length);
131
132 (*user_info)->encrypted = encrypted;
133
134 (*user_info)->logon_parameters = 0;
135
136 DEBUG(10,("made an %sencrypted user_info for %s (%s)\n", encrypted ? "":"un" , internal_username, smb_name));
137
138 return NT_STATUS_OK;
139 }
140
141 /****************************************************************************
142 Create an auth_usersupplied_data structure after appropriate mapping.
143 ****************************************************************************/
144
145 NTSTATUS make_user_info_map(auth_usersupplied_info **user_info,
146 const char *smb_name,
147 const char *client_domain,
148 const char *wksta_name,
149 DATA_BLOB *lm_pwd, DATA_BLOB *nt_pwd,
150 DATA_BLOB *lm_interactive_pwd, DATA_BLOB *nt_interactive_pwd,
151 DATA_BLOB *plaintext,
152 BOOL encrypted)
153 {
154 const char *domain;
155 NTSTATUS result;
156 BOOL was_mapped;
157 fstring internal_username;
158 fstrcpy(internal_username, smb_name);
159 was_mapped = map_username(internal_username);
160
161 DEBUG(5, ("make_user_info_map: Mapping user [%s]\\[%s] from workstation [%s]\n",
162 client_domain, smb_name, wksta_name));
163
164 /* don't allow "" as a domain, fixes a Win9X bug
165 where it doens't supply a domain for logon script
166 'net use' commands. */
167
168 if ( *client_domain )
169 domain = client_domain;
170 else
171 domain = lp_workgroup();
172
173 /* do what win2k does. Always map unknown domains to our own
174 and let the "passdb backend" handle unknown users. */
175
176 if ( !is_trusted_domain(domain) && !strequal(domain, get_global_sam_name()) )
177 domain = my_sam_name();
178
179 /* we know that it is a trusted domain (and we are allowing them) or it is our domain */
180
181 result = make_user_info(user_info, smb_name, internal_username,
182 client_domain, domain, wksta_name,
183 lm_pwd, nt_pwd,
184 lm_interactive_pwd, nt_interactive_pwd,
185 plaintext, encrypted);
186 if (NT_STATUS_IS_OK(result)) {
187 (*user_info)->was_mapped = was_mapped;
188 }
189 return result;
190 }
191
192 /****************************************************************************
193 Create an auth_usersupplied_data, making the DATA_BLOBs here.
194 Decrypt and encrypt the passwords.
195 ****************************************************************************/
196
197 BOOL make_user_info_netlogon_network(auth_usersupplied_info **user_info,
198 const char *smb_name,
199 const char *client_domain,
200 const char *wksta_name,
201 uint32 logon_parameters,
202 const uchar *lm_network_pwd,
203 int lm_pwd_len,
204 const uchar *nt_network_pwd,
205 int nt_pwd_len)
206 {
207 BOOL ret;
208 NTSTATUS status;
209 DATA_BLOB lm_blob = data_blob(lm_network_pwd, lm_pwd_len);
210 DATA_BLOB nt_blob = data_blob(nt_network_pwd, nt_pwd_len);
211
212 status = make_user_info_map(user_info,
213 smb_name, client_domain,
214 wksta_name,
215 lm_pwd_len ? &lm_blob : NULL,
216 nt_pwd_len ? &nt_blob : NULL,
217 NULL, NULL, NULL,
218 True);
219
220 if (NT_STATUS_IS_OK(status)) {
221 (*user_info)->logon_parameters = logon_parameters;
222 }
223 ret = NT_STATUS_IS_OK(status) ? True : False;
224
225 data_blob_free(&lm_blob);
226 data_blob_free(&nt_blob);
227 return ret;
228 }
229
230 /****************************************************************************
231 Create an auth_usersupplied_data, making the DATA_BLOBs here.
232 Decrypt and encrypt the passwords.
233 ****************************************************************************/
234
235 BOOL make_user_info_netlogon_interactive(auth_usersupplied_info **user_info,
236 const char *smb_name,
237 const char *client_domain,
238 const char *wksta_name,
239 uint32 logon_parameters,
240 const uchar chal[8],
241 const uchar lm_interactive_pwd[16],
242 const uchar nt_interactive_pwd[16],
243 const uchar *dc_sess_key)
244 {
245 char lm_pwd[16];
246 char nt_pwd[16];
247 unsigned char local_lm_response[24];
248 unsigned char local_nt_response[24];
249 unsigned char key[16];
250
251 ZERO_STRUCT(key);
252 memcpy(key, dc_sess_key, 8);
253
254 if (lm_interactive_pwd)
255 memcpy(lm_pwd, lm_interactive_pwd, sizeof(lm_pwd));
256
257 if (nt_interactive_pwd)
258 memcpy(nt_pwd, nt_interactive_pwd, sizeof(nt_pwd));
259
260 #ifdef DEBUG_PASSWORD
261 DEBUG(100,("key:"));
262 dump_data(100, (char *)key, sizeof(key));
263
264 DEBUG(100,("lm owf password:"));
265 dump_data(100, lm_pwd, sizeof(lm_pwd));
266
267 DEBUG(100,("nt owf password:"));
268 dump_data(100, nt_pwd, sizeof(nt_pwd));
269 #endif
270
271 if (lm_interactive_pwd)
272 SamOEMhash((uchar *)lm_pwd, key, sizeof(lm_pwd));
273
274 if (nt_interactive_pwd)
275 SamOEMhash((uchar *)nt_pwd, key, sizeof(nt_pwd));
276
277 #ifdef DEBUG_PASSWORD
278 DEBUG(100,("decrypt of lm owf password:"));
279 dump_data(100, lm_pwd, sizeof(lm_pwd));
280
281 DEBUG(100,("decrypt of nt owf password:"));
282 dump_data(100, nt_pwd, sizeof(nt_pwd));
283 #endif
284
285 if (lm_interactive_pwd)
286 SMBOWFencrypt((const unsigned char *)lm_pwd, chal,
287 local_lm_response);
288
289 if (nt_interactive_pwd)
290 SMBOWFencrypt((const unsigned char *)nt_pwd, chal,
291 local_nt_response);
292
293 /* Password info paranoia */
294 ZERO_STRUCT(key);
295
296 {
297 BOOL ret;
298 NTSTATUS nt_status;
299 DATA_BLOB local_lm_blob;
300 DATA_BLOB local_nt_blob;
301
302 DATA_BLOB lm_interactive_blob;
303 DATA_BLOB nt_interactive_blob;
304
305 if (lm_interactive_pwd) {
306 local_lm_blob = data_blob(local_lm_response,
307 sizeof(local_lm_response));
308 lm_interactive_blob = data_blob(lm_pwd,
309 sizeof(lm_pwd));
310 ZERO_STRUCT(lm_pwd);
311 }
312
313 if (nt_interactive_pwd) {
314 local_nt_blob = data_blob(local_nt_response,
315 sizeof(local_nt_response));
316 nt_interactive_blob = data_blob(nt_pwd,
317 sizeof(nt_pwd));
318 ZERO_STRUCT(nt_pwd);
319 }
320
321 nt_status = make_user_info_map(
322 user_info,
323 smb_name, client_domain, wksta_name,
324 lm_interactive_pwd ? &local_lm_blob : NULL,
325 nt_interactive_pwd ? &local_nt_blob : NULL,
326 lm_interactive_pwd ? &lm_interactive_blob : NULL,
327 nt_interactive_pwd ? &nt_interactive_blob : NULL,
328 NULL, True);
329
330 if (NT_STATUS_IS_OK(nt_status)) {
331 (*user_info)->logon_parameters = logon_parameters;
332 }
333
334 ret = NT_STATUS_IS_OK(nt_status) ? True : False;
335 data_blob_free(&local_lm_blob);
336 data_blob_free(&local_nt_blob);
337 data_blob_free(&lm_interactive_blob);
338 data_blob_free(&nt_interactive_blob);
339 return ret;
340 }
341 }
342
343
344 /****************************************************************************
345 Create an auth_usersupplied_data structure
346 ****************************************************************************/
347
348 BOOL make_user_info_for_reply(auth_usersupplied_info **user_info,
349 const char *smb_name,
350 const char *client_domain,
351 const uint8 chal[8],
352 DATA_BLOB plaintext_password)
353 {
354
355 DATA_BLOB local_lm_blob;
356 DATA_BLOB local_nt_blob;
357 NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
358
359 /*
360 * Not encrypted - do so.
361 */
362
363 DEBUG(5,("make_user_info_for_reply: User passwords not in encrypted "
364 "format.\n"));
365
366 if (plaintext_password.data) {
367 unsigned char local_lm_response[24];
368
369 #ifdef DEBUG_PASSWORD
370 DEBUG(10,("Unencrypted password (len %d):\n",
371 (int)plaintext_password.length));
372 dump_data(100, (const char *)plaintext_password.data,
373 plaintext_password.length);
374 #endif
375
376 SMBencrypt( (const char *)plaintext_password.data,
377 (const uchar*)chal, local_lm_response);
378 local_lm_blob = data_blob(local_lm_response, 24);
379
380 /* We can't do an NT hash here, as the password needs to be
381 case insensitive */
382 local_nt_blob = data_blob(NULL, 0);
383
384 } else {
385 local_lm_blob = data_blob(NULL, 0);
386 local_nt_blob = data_blob(NULL, 0);
387 }
388
389 ret = make_user_info_map(
390 user_info, smb_name, client_domain,
391 get_remote_machine_name(),
392 local_lm_blob.data ? &local_lm_blob : NULL,
393 local_nt_blob.data ? &local_nt_blob : NULL,
394 NULL, NULL,
395 plaintext_password.data ? &plaintext_password : NULL,
396 False);
397
398 data_blob_free(&local_lm_blob);
399 return NT_STATUS_IS_OK(ret) ? True : False;
400 }
401
402 /****************************************************************************
403 Create an auth_usersupplied_data structure
404 ****************************************************************************/
405
406 NTSTATUS make_user_info_for_reply_enc(auth_usersupplied_info **user_info,
407 const char *smb_name,
408 const char *client_domain,
409 DATA_BLOB lm_resp, DATA_BLOB nt_resp)
410 {
411 return make_user_info_map(user_info, smb_name,
412 client_domain,
413 get_remote_machine_name(),
414 lm_resp.data ? &lm_resp : NULL,
415 nt_resp.data ? &nt_resp : NULL,
416 NULL, NULL, NULL,
417 True);
418 }
419
420 /****************************************************************************
421 Create a guest user_info blob, for anonymous authenticaion.
422 ****************************************************************************/
423
424 BOOL make_user_info_guest(auth_usersupplied_info **user_info)
425 {
426 NTSTATUS nt_status;
427
428 nt_status = make_user_info(user_info,
429 "","",
430 "","",
431 "",
432 NULL, NULL,
433 NULL, NULL,
434 NULL,
435 True);
436
437 return NT_STATUS_IS_OK(nt_status) ? True : False;
438 }
439
440 /****************************************************************************
441 prints a NT_USER_TOKEN to debug output.
442 ****************************************************************************/
443
444 void debug_nt_user_token(int dbg_class, int dbg_lev, NT_USER_TOKEN *token)
445 {
446 size_t i;
447
448 if (!token) {
449 DEBUGC(dbg_class, dbg_lev, ("NT user token: (NULL)\n"));
450 return;
451 }
452
453 DEBUGC(dbg_class, dbg_lev,
454 ("NT user token of user %s\n",
455 sid_string_static(&token->user_sids[0]) ));
456 DEBUGADDC(dbg_class, dbg_lev,
457 ("contains %lu SIDs\n", (unsigned long)token->num_sids));
458 for (i = 0; i < token->num_sids; i++)
459 DEBUGADDC(dbg_class, dbg_lev,
460 ("SID[%3lu]: %s\n", (unsigned long)i,
461 sid_string_static(&token->user_sids[i])));
462
463 dump_se_priv( dbg_class, dbg_lev, &token->privileges );
464 }
465
466 /****************************************************************************
467 prints a UNIX 'token' to debug output.
468 ****************************************************************************/
469
470 void debug_unix_user_token(int dbg_class, int dbg_lev, uid_t uid, gid_t gid,
471 int n_groups, gid_t *groups)
472 {
473 int i;
474 DEBUGC(dbg_class, dbg_lev,
475 ("UNIX token of user %ld\n", (long int)uid));
476
477 DEBUGADDC(dbg_class, dbg_lev,
478 ("Primary group is %ld and contains %i supplementary "
479 "groups\n", (long int)gid, n_groups));
480 for (i = 0; i < n_groups; i++)
481 DEBUGADDC(dbg_class, dbg_lev, ("Group[%3i]: %ld\n", i,
482 (long int)groups[i]));
483 }
484
485 /******************************************************************************
486 Create a token for the root user to be used internally by smbd.
487 This is similar to running under the context of the LOCAL_SYSTEM account
488 in Windows. This is a read-only token. Do not modify it or free() it.
489 Create a copy if your need to change it.
490 ******************************************************************************/
491
492 NT_USER_TOKEN *get_root_nt_token( void )
493 {
494 static NT_USER_TOKEN *token = NULL;
495 DOM_SID u_sid, g_sid;
496 struct passwd *pw;
497
498 if ( token )
499 return token;
500
501 if ( !(pw = sys_getpwnam( "root" )) ) {
502 DEBUG(0,("get_root_nt_token: getpwnam\"root\") failed!\n"));
503 return NULL;
504 }
505
506 /* get the user and primary group SIDs; although the
507 BUILTIN\Administrators SId is really the one that matters here */
508
509 uid_to_sid(&u_sid, pw->pw_uid);
510 gid_to_sid(&g_sid, pw->pw_gid);
511
512 token = create_local_nt_token(NULL, &u_sid, &g_sid, False,
513 1, &global_sid_Builtin_Administrators);
514 return token;
515 }
516
517 static int server_info_dtor(void *p)
518 {
519 auth_serversupplied_info *server_info =
520 talloc_get_type_abort(p, auth_serversupplied_info);
521
522 if (server_info->sam_account != NULL) {
523 TALLOC_FREE(server_info->sam_account);
524 }
525
526 ZERO_STRUCTP(server_info);
527 return 0;
528 }
529
530 /***************************************************************************
531 Make a server_info struct. Free with TALLOC_FREE().
532 ***************************************************************************/
533
534 static auth_serversupplied_info *make_server_info(TALLOC_CTX *mem_ctx)
535 {
536 struct auth_serversupplied_info *result;
537
538 result = TALLOC_ZERO_P(mem_ctx, auth_serversupplied_info);
539 if (result == NULL) {
540 DEBUG(0, ("talloc failed\n"));
541 return NULL;
542 }
543
544 talloc_set_destructor(result, server_info_dtor);
545
546 /* Initialise the uid and gid values to something non-zero
547 which may save us from giving away root access if there
548 is a bug in allocating these fields. */
549
550 result->uid = -1;
551 result->gid = -1;
552 return result;
553 }
554
555 /***************************************************************************
556 Make (and fill) a user_info struct from a struct samu
557 ***************************************************************************/
558
559 NTSTATUS make_server_info_sam(auth_serversupplied_info **server_info,
560 struct samu *sampass)
561 {
562 NTSTATUS status;
563 struct passwd *pwd;
564 gid_t *gids;
565 auth_serversupplied_info *result;
566
567 if ( !(pwd = getpwnam_alloc(NULL, pdb_get_username(sampass))) ) {
568 DEBUG(1, ("User %s in passdb, but getpwnam() fails!\n",
569 pdb_get_username(sampass)));
570 return NT_STATUS_NO_SUCH_USER;
571 }
572
573 if ( !(result = make_server_info(NULL)) ) {
574 TALLOC_FREE(pwd);
575 return NT_STATUS_NO_MEMORY;
576 }
577
578 result->sam_account = sampass;
579 result->unix_name = talloc_strdup(result, pwd->pw_name);
580 result->gid = pwd->pw_gid;
581 result->uid = pwd->pw_uid;
582
583 TALLOC_FREE(pwd);
584
585 status = pdb_enum_group_memberships(result, sampass,
586 &result->sids, &gids,
587 &result->num_sids);
588
589 if (!NT_STATUS_IS_OK(status)) {
590 DEBUG(10, ("pdb_enum_group_memberships failed: %s\n",
591 nt_errstr(status)));
592 result->sam_account = NULL; /* Don't free on error exit. */
593 TALLOC_FREE(result);
594 return status;
595 }
596
597 /* For now we throw away the gids and convert via sid_to_gid
598 * later. This needs fixing, but I'd like to get the code straight and
599 * simple first. */
600 TALLOC_FREE(gids);
601
602 DEBUG(5,("make_server_info_sam: made server info for user %s -> %s\n",
603 pdb_get_username(sampass), result->unix_name));
604
605 *server_info = result;
606
607 return NT_STATUS_OK;
608 }
609
610 /*
611 * Add alias SIDs from memberships within the partially created token SID list
612 */
613
614 static NTSTATUS add_aliases(TALLOC_CTX *tmp_ctx, const DOM_SID *domain_sid,
615 struct nt_user_token *token)
616 {
617 uint32 *aliases;
618 size_t i, num_aliases;
619 NTSTATUS status;
620
621 aliases = NULL;
622 num_aliases = 0;
623
624 status = pdb_enum_alias_memberships(tmp_ctx, domain_sid,
625 token->user_sids,
626 token->num_sids,
627 &aliases, &num_aliases);
628
629 if (!NT_STATUS_IS_OK(status)) {
630 DEBUG(10, ("pdb_enum_alias_memberships failed: %s\n",
631 nt_errstr(status)));
632 return status;
633 }
634
635 for (i=0; i<num_aliases; i++) {
636 DOM_SID alias_sid;
637 sid_compose(&alias_sid, domain_sid, aliases[i]);
638 add_sid_to_array_unique(token, &alias_sid,
639 &token->user_sids,
640 &token->num_sids);
641 if (token->user_sids == NULL) {
642 DEBUG(0, ("add_sid_to_array failed\n"));
643 return NT_STATUS_NO_MEMORY;
644 }
645 }
646
647 return NT_STATUS_OK;
648 }
649
650 static NTSTATUS log_nt_token(TALLOC_CTX *tmp_ctx, NT_USER_TOKEN *token)
651 {
652 char *command;
653 char *group_sidstr;
654 size_t i;
655
656 if ((lp_log_nt_token_command() == NULL) ||
657 (strlen(lp_log_nt_token_command()) == 0)) {
658 return NT_STATUS_OK;
659 }
660
661 group_sidstr = talloc_strdup(tmp_ctx, "");
662 for (i=1; i<token->num_sids; i++) {
663 group_sidstr = talloc_asprintf(
664 tmp_ctx, "%s %s", group_sidstr,
665 sid_string_static(&token->user_sids[i]));
666 }
667
668 command = talloc_string_sub(
669 tmp_ctx, lp_log_nt_token_command(),
670 "%s", sid_string_static(&token->user_sids[0]));
671 command = talloc_string_sub(tmp_ctx, command, "%t", group_sidstr);
672
673 if (command == NULL) {
674 return NT_STATUS_NO_MEMORY;
675 }
676
677 DEBUG(8, ("running command: [%s]\n", command));
678 if (smbrun(command, NULL) != 0) {
679 DEBUG(0, ("Could not log NT token\n"));
680 return NT_STATUS_ACCESS_DENIED;
681 }
682
683 return NT_STATUS_OK;
684 }
685
686 /*******************************************************************
687 *******************************************************************/
688
689 static NTSTATUS add_builtin_administrators( TALLOC_CTX *ctx, struct nt_user_token *token )
690 {
691 DOM_SID domadm;
692
693 /* nothing to do if we aren't in a domain */
694
695 if ( !(IS_DC || lp_server_role()==ROLE_DOMAIN_MEMBER) ) {
696 return NT_STATUS_OK;
697 }
698
699 /* Find the Domain Admins SID */
700
701 if ( IS_DC ) {
702 sid_copy( &domadm, get_global_sam_sid() );
703 } else {
704 if ( !secrets_fetch_domain_sid( lp_workgroup(), &domadm ) )
705 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
706 }
707 sid_append_rid( &domadm, DOMAIN_GROUP_RID_ADMINS );
708
709 /* Add Administrators if the user beloongs to Domain Admins */
710
711 if ( nt_token_check_sid( &domadm, token ) ) {
712 add_sid_to_array(token, &global_sid_Builtin_Administrators,
713 &token->user_sids, &token->num_sids);
714 }
715
716 return NT_STATUS_OK;
717 }
718
719 /*******************************************************************
720 *******************************************************************/
721
722 static NTSTATUS create_builtin_users( void )
723 {
724 NTSTATUS status;
725 DOM_SID dom_users;
726
727 status = pdb_create_builtin_alias( BUILTIN_ALIAS_RID_USERS );
728 if ( !NT_STATUS_IS_OK(status) ) {
729 DEBUG(0,("create_builtin_users: Failed to create Users\n"));
730 return status;
731 }
732
733 /* add domain users */
734 if ((IS_DC || (lp_server_role() == ROLE_DOMAIN_MEMBER))
735 && secrets_fetch_domain_sid(lp_workgroup(), &dom_users))
736 {
737 sid_append_rid(&dom_users, DOMAIN_GROUP_RID_USERS );
738 status = pdb_add_aliasmem( &global_sid_Builtin_Users, &dom_users);
739 if ( !NT_STATUS_IS_OK(status) ) {
740 DEBUG(0,("create_builtin_administrators: Failed to add Domain Users to"
741 " Users\n"));
742 return status;
743 }
744 }
745
746 return NT_STATUS_OK;
747 }
748
749 /*******************************************************************
750 *******************************************************************/
751
752 static NTSTATUS create_builtin_administrators( void )
753 {
754 NTSTATUS status;
755 DOM_SID dom_admins, root_sid;
756 fstring root_name;
757 enum SID_NAME_USE type;
758 TALLOC_CTX *ctx;
759 BOOL ret;
760
761 status = pdb_create_builtin_alias( BUILTIN_ALIAS_RID_ADMINS );
762 if ( !NT_STATUS_IS_OK(status) ) {
763 DEBUG(0,("create_builtin_administrators: Failed to create Administrators\n"));
764 return status;
765 }
766
767 /* add domain admins */
768 if ((IS_DC || (lp_server_role() == ROLE_DOMAIN_MEMBER))
769 && secrets_fetch_domain_sid(lp_workgroup(), &dom_admins))
770 {
771 sid_append_rid(&dom_admins, DOMAIN_GROUP_RID_ADMINS);
772 status = pdb_add_aliasmem( &global_sid_Builtin_Administrators, &dom_admins );
773 if ( !NT_STATUS_IS_OK(status) ) {
774 DEBUG(0,("create_builtin_administrators: Failed to add Domain Admins"
775 " Administrators\n"));
776 return status;
777 }
778 }
779
780 /* add root */
781 if ( (ctx = talloc_init(NULL)) == NULL ) {
782 return NT_STATUS_NO_MEMORY;
783 }
784 fstr_sprintf( root_name, "%s\\root", get_global_sam_name() );
785 ret = lookup_name( ctx, root_name, 0, NULL, NULL, &root_sid, &type );
786 TALLOC_FREE( ctx );
787
788 if ( ret ) {
789 status = pdb_add_aliasmem( &global_sid_Builtin_Administrators, &root_sid );
790 if ( !NT_STATUS_IS_OK(status) ) {
791 DEBUG(0,("create_builtin_administrators: Failed to add root"
792 " Administrators\n"));
793 return status;
794 }
795 }
796
797 return NT_STATUS_OK;
798 }
799
800 /*******************************************************************
801 Create a NT token for the user, expanding local aliases
802 *******************************************************************/
803
804 static struct nt_user_token *create_local_nt_token(TALLOC_CTX *mem_ctx,
805 const DOM_SID *user_sid,
806 const DOM_SID *group_sid,
807 BOOL is_guest,
808 int num_groupsids,
809 const DOM_SID *groupsids)
810 {
811 TALLOC_CTX *tmp_ctx;
812 struct nt_user_token *result = NULL;
813 int i;
814 NTSTATUS status;
815 gid_t gid;
816
817 tmp_ctx = talloc_new(mem_ctx);
818 if (tmp_ctx == NULL) {
819 DEBUG(0, ("talloc_new failed\n"));
820 return NULL;
821 }
822
823 result = TALLOC_ZERO_P(tmp_ctx, NT_USER_TOKEN);
824 if (result == NULL) {
825 DEBUG(0, ("talloc failed\n"));
826 goto done;
827 }
828
829 /* Add the user and primary group sid */
830
831 add_sid_to_array(result, user_sid,
832 &result->user_sids, &result->num_sids);
833 add_sid_to_array(result, group_sid,
834 &result->user_sids, &result->num_sids);
835
836 /* Add in BUILTIN sids */
837
838 add_sid_to_array(result, &global_sid_World,
839 &result->user_sids, &result->num_sids);
840 add_sid_to_array(result, &global_sid_Network,
841 &result->user_sids, &result->num_sids);
842
843 if (is_guest) {
844 add_sid_to_array(result, &global_sid_Builtin_Guests,
845 &result->user_sids, &result->num_sids);
846 } else {
847 add_sid_to_array(result, &global_sid_Authenticated_Users,
848 &result->user_sids, &result->num_sids);
849 }
850
851 /* Now the SIDs we got from authentication. These are the ones from
852 * the info3 struct or from the pdb_enum_group_memberships, depending
853 * on who authenticated the user. */
854
855 for (i=0; i<num_groupsids; i++) {
856 add_sid_to_array_unique(result, &groupsids[i],
857 &result->user_sids, &result->num_sids);
858 }
859
860 /* Deal with the BUILTIN\Administrators group. If the SID can
861 be resolved then assume that the add_aliasmem( S-1-5-32 )
862 handled it. */
863
864 if ( !sid_to_gid( &global_sid_Builtin_Administrators, &gid ) ) {
865 /* We can only create a mapping if winbind is running
866 and the nested group functionality has been enabled */
867
868 if ( lp_winbind_nested_groups() && winbind_ping() ) {
869 become_root();
870 status = create_builtin_administrators( );
871 if ( !NT_STATUS_IS_OK(status) ) {
872 DEBUG(0,("create_local_nt_token: Failed to create BUILTIN\\Administrators group!\n"));
873 /* don't fail, just log the message */
874 }
875 unbecome_root();
876 }
877 else {
878 status = add_builtin_administrators( tmp_ctx, result );
879 if ( !NT_STATUS_IS_OK(status) ) {
880 result = NULL;
881 goto done;
882 }
883 }
884 }
885
886 /* Deal with the BUILTIN\Users group. If the SID can
887 be resolved then assume that the add_aliasmem( S-1-5-32 )
888 handled it. */
889
890 if ( !sid_to_gid( &global_sid_Builtin_Users, &gid ) ) {
891 /* We can only create a mapping if winbind is running
892 and the nested group functionality has been enabled */
893
894 if ( lp_winbind_nested_groups() && winbind_ping() ) {
895 become_root();
896 status = create_builtin_users( );
897 if ( !NT_STATUS_IS_OK(status) ) {
898 DEBUG(0,("create_local_nt_token: Failed to create BUILTIN\\Administrators group!\n"));
899 /* don't fail, just log the message */
900 }
901 unbecome_root();
902 }
903 }
904
905 /* Deal with local groups */
906
907 if (lp_winbind_nested_groups()) {
908
909 /* Now add the aliases. First the one from our local SAM */
910
911 status = add_aliases(tmp_ctx, get_global_sam_sid(), result);
912
913 if (!NT_STATUS_IS_OK(status)) {
914 result = NULL;
915 goto done;
916 }
917
918 /* Finally the builtin ones */
919
920 status = add_aliases(tmp_ctx, &global_sid_Builtin, result);
921
922 if (!NT_STATUS_IS_OK(status)) {
923 result = NULL;
924 goto done;
925 }
926 }
927
928
929 get_privileges_for_sids(&result->privileges, result->user_sids,
930 result->num_sids);
931
932 talloc_steal(mem_ctx, result);
933
934 done:
935 TALLOC_FREE(tmp_ctx);
936 return result;
937 }
938
939 /*
940 * Create the token to use from server_info->sam_account and
941 * server_info->sids (the info3/sam groups). Find the unix gids.
942 */
943
944 NTSTATUS create_local_token(auth_serversupplied_info *server_info)
945 {
946 TALLOC_CTX *mem_ctx;
947 NTSTATUS status;
948 size_t i;
949
950
951 mem_ctx = talloc_new(NULL);
952 if (mem_ctx == NULL) {
953 DEBUG(0, ("talloc_new failed\n"));
954 return NT_STATUS_NO_MEMORY;
955 }
956
957 if (server_info->was_mapped) {
958 status = create_token_from_username(server_info,
959 server_info->unix_name,
960 server_info->guest,
961 &server_info->uid,
962 &server_info->gid,
963 &server_info->unix_name,
964 &server_info->ptok);
965
966 } else {
967 server_info->ptok = create_local_nt_token(
968 server_info,
969 pdb_get_user_sid(server_info->sam_account),
970 pdb_get_group_sid(server_info->sam_account),
971 server_info->guest,
972 server_info->num_sids, server_info->sids);
973 status = server_info->ptok ?
974 NT_STATUS_OK : NT_STATUS_NO_SUCH_USER;
975 }
976
977 if (!NT_STATUS_IS_OK(status)) {
978 TALLOC_FREE(mem_ctx);
979 return status;
980 }
981
982 /* Convert the SIDs to gids. */
983
984 server_info->n_groups = 0;
985 server_info->groups = NULL;
986
987 /* Start at index 1, where the groups start. */
988
989 for (i=1; i<server_info->ptok->num_sids; i++) {
990 gid_t gid;
991 DOM_SID *sid = &server_info->ptok->user_sids[i];
992
993 if (!sid_to_gid(sid, &gid)) {
994 DEBUG(10, ("Could not convert SID %s to gid, "
995 "ignoring it\n", sid_string_static(sid)));
996 continue;
997 }
998 add_gid_to_array_unique(server_info, gid, &server_info->groups,
999 &server_info->n_groups);
1000 }
1001
1002 debug_nt_user_token(DBGC_AUTH, 10, server_info->ptok);
1003
1004 status = log_nt_token(mem_ctx, server_info->ptok);
1005
1006 TALLOC_FREE(mem_ctx);
1007 return status;
1008 }
1009
1010 /*
1011 * Create an artificial NT token given just a username. (Initially indended
1012 * for force user)
1013 *
1014 * We go through lookup_name() to avoid problems we had with 'winbind use
1015 * default domain'.
1016 *
1017 * We have 3 cases:
1018 *
1019 * unmapped unix users: Go directly to nss to find the user's group.
1020 *
1021 * A passdb user: The list of groups is provided by pdb_enum_group_memberships.
1022 *
1023 * If the user is provided by winbind, the primary gid is set to "domain
1024 * users" of the user's domain. For an explanation why this is necessary, see
1025 * the thread starting at
1026 * http://lists.samba.org/archive/samba-technical/2006-January/044803.html.
1027 */
1028
1029 NTSTATUS create_token_from_username(TALLOC_CTX *mem_ctx, const char *username,
1030 BOOL is_guest,
1031 uid_t *uid, gid_t *gid,
1032 char **found_username,
1033 struct nt_user_token **token)
1034 {
1035 NTSTATUS result = NT_STATUS_NO_SUCH_USER;
1036 TALLOC_CTX *tmp_ctx;
1037 DOM_SID user_sid;
1038 enum SID_NAME_USE type;
1039 gid_t *gids;
1040 DOM_SID primary_group_sid;
1041 DOM_SID *group_sids;
1042 size_t num_group_sids;
1043
1044 tmp_ctx = talloc_new(NULL);
1045 if (tmp_ctx == NULL) {
1046 DEBUG(0, ("talloc_new failed\n"));
1047 return NT_STATUS_NO_MEMORY;
1048 }
1049
1050 if (!lookup_name(tmp_ctx, username, LOOKUP_NAME_ALL,
1051 NULL, NULL, &user_sid, &type)) {
1052 DEBUG(1, ("lookup_name for %s failed\n", username));
1053 goto done;
1054 }
1055
1056 if (type != SID_NAME_USER) {
1057 DEBUG(1, ("%s is a %s, not a user\n", username,
1058 sid_type_lookup(type)));
1059 goto done;
1060 }
1061
1062 if (!sid_to_uid(&user_sid, uid)) {
1063 DEBUG(1, ("sid_to_uid for %s (%s) failed\n",
1064 username, sid_string_static(&user_sid)));
1065 goto done;
1066 }
1067
1068 if (sid_check_is_in_unix_users(&user_sid)) {
1069
1070 /* This is a unix user not in passdb. We need to ask nss
1071 * directly, without consulting passdb */
1072
1073 struct passwd *pass;
1074 size_t i;
1075
1076 pass = getpwuid_alloc(tmp_ctx, *uid);
1077 if (pass == NULL) {
1078 DEBUG(1, ("getpwuid(%d) for user %s failed\n",
1079 *uid, username));
1080 goto done;
1081 }
1082
1083 *gid = pass->pw_gid;
1084 gid_to_sid(&primary_group_sid, pass->pw_gid);
1085
1086 if (!getgroups_unix_user(tmp_ctx, username, pass->pw_gid,
1087 &gids, &num_group_sids)) {
1088 DEBUG(1, ("getgroups_unix_user for user %s failed\n",
1089 username));
1090 goto done;
1091 }
1092
1093 group_sids = talloc_array(tmp_ctx, DOM_SID, num_group_sids);
1094 if (group_sids == NULL) {
1095 DEBUG(1, ("talloc_array failed\n"));
1096 result = NT_STATUS_NO_MEMORY;
1097 goto done;
1098 }
1099
1100 for (i=0; i<num_group_sids; i++) {
1101 gid_to_sid(&group_sids[i], gids[i]);
1102 }
1103 *found_username = talloc_strdup(mem_ctx, pass->pw_name);
1104
1105 } else if (sid_check_is_in_our_domain(&user_sid)) {
1106
1107 /* This is a passdb user, so ask passdb */
1108
1109 struct samu *sam_acct = NULL;
1110 const DOM_SID *gr_sid = NULL;
1111
1112 if ( !(sam_acct = samu_new( tmp_ctx )) ) {
1113 result = NT_STATUS_NO_MEMORY;
1114 goto done;
1115 }
1116
1117 if (!pdb_getsampwsid(sam_acct, &user_sid)) {
1118 DEBUG(1, ("pdb_getsampwsid(%s) for user %s failed\n",
1119 sid_string_static(&user_sid), username));
1120 result = NT_STATUS_NO_SUCH_USER;
1121 goto done;
1122 }
1123
1124 gr_sid = pdb_get_group_sid(sam_acct);
1125 if (!gr_sid) {
1126 result = NT_STATUS_NO_MEMORY;
1127 goto done;
1128 }
1129
1130 sid_copy(&primary_group_sid, gr_sid);
1131
1132 if (!sid_to_gid(&primary_group_sid, gid)) {
1133 DEBUG(1, ("sid_to_gid(%s) failed\n",
1134 sid_string_static(&primary_group_sid)));
1135 goto done;
1136 }
1137
1138 result = pdb_enum_group_memberships(tmp_ctx, sam_acct,
1139 &group_sids, &gids,
1140 &num_group_sids);
1141 if (!NT_STATUS_IS_OK(result)) {
1142 DEBUG(10, ("enum_group_memberships failed for %s\n",
1143 username));
1144 goto done;
1145 }
1146
1147 *found_username = talloc_strdup(mem_ctx,
1148 pdb_get_username(sam_acct));
1149
1150 } else {
1151
1152 /* This user is from winbind, force the primary gid to the
1153 * user's "domain users" group. Under certain circumstances
1154 * (user comes from NT4), this might be a loss of
1155 * information. But we can not rely on winbind getting the
1156 * correct info. AD might prohibit winbind looking up that
1157 * information. */
1158
1159 uint32 dummy;
1160
1161 sid_copy(&primary_group_sid, &user_sid);
1162 sid_split_rid(&primary_group_sid, &dummy);
1163 sid_append_rid(&primary_group_sid, DOMAIN_GROUP_RID_USERS);
1164
1165 if (!sid_to_gid(&primary_group_sid, gid)) {
1166 DEBUG(1, ("sid_to_gid(%s) failed\n",
1167 sid_string_static(&primary_group_sid)));
1168 goto done;
1169 }
1170
1171 num_group_sids = 0;
1172 group_sids = NULL;
1173
1174 *found_username = talloc_strdup(mem_ctx, username);
1175 }
1176
1177 *token = create_local_nt_token(mem_ctx, &user_sid, &primary_group_sid,
1178 is_guest, num_group_sids, group_sids);
1179
1180 if ((*token == NULL) || (*found_username == NULL)) {
1181 result = NT_STATUS_NO_MEMORY;
1182 goto done;
1183 }
1184
1185 result = NT_STATUS_OK;
1186 done:
1187 TALLOC_FREE(tmp_ctx);
1188 return result;
1189 }
1190
1191 /***************************************************************************
1192 Build upon create_token_from_username:
1193
1194 Expensive helper function to figure out whether a user given its name is
1195 member of a particular group.
1196 ***************************************************************************/
1197 BOOL user_in_group_sid(const char *username, const DOM_SID *group_sid)
1198 {
1199 NTSTATUS status;
1200 uid_t uid;
1201 gid_t gid;
1202 char *found_username;
1203 struct nt_user_token *token;
1204 BOOL result;
1205
1206 TALLOC_CTX *mem_ctx;
1207
1208 mem_ctx = talloc_new(NULL);
1209 if (mem_ctx == NULL) {
1210 DEBUG(0, ("talloc_new failed\n"));
1211 return False;
1212 }
1213
1214 status = create_token_from_username(mem_ctx, username, False,
1215 &uid, &gid, &found_username,
1216 &token);
1217
1218 if (!NT_STATUS_IS_OK(status)) {
1219 DEBUG(10, ("could not create token for %s\n", username));
1220 return False;
1221 }
1222
1223 result = nt_token_check_sid(group_sid, token);
1224
1225 TALLOC_FREE(mem_ctx);
1226 return result;
1227
1228 }
1229
1230 BOOL user_in_group(const char *username, const char *groupname)
1231 {
1232 TALLOC_CTX *mem_ctx;
1233 DOM_SID group_sid;
1234 BOOL ret;
1235
1236 mem_ctx = talloc_new(NULL);
1237 if (mem_ctx == NULL) {
1238 DEBUG(0, ("talloc_new failed\n"));
1239 return False;
1240 }
1241
1242 ret = lookup_name(mem_ctx, groupname, LOOKUP_NAME_ALL,
1243 NULL, NULL, &group_sid, NULL);
1244 TALLOC_FREE(mem_ctx);
1245
1246 if (!ret) {
1247 DEBUG(10, ("lookup_name for (%s) failed.\n", groupname));
1248 return False;
1249 }
1250
1251 return user_in_group_sid(username, &group_sid);
1252 }
1253
1254
1255 /***************************************************************************
1256 Make (and fill) a user_info struct from a 'struct passwd' by conversion
1257 to a struct samu
1258 ***************************************************************************/
1259
1260 NTSTATUS make_server_info_pw(auth_serversupplied_info **server_info,
1261 char *unix_username,
1262 struct passwd *pwd)
1263 {
1264 NTSTATUS status;
1265 struct samu *sampass = NULL;
1266 gid_t *gids;
1267 auth_serversupplied_info *result;
1268
1269 if ( !(sampass = samu_new( NULL )) ) {
1270 return NT_STATUS_NO_MEMORY;
1271 }
1272
1273 status = samu_set_unix( sampass, pwd );
1274 if (!NT_STATUS_IS_OK(status)) {
1275 return status;
1276 }
1277
1278 result = make_server_info(NULL);
1279 if (result == NULL) {
1280 TALLOC_FREE(sampass);
1281 return NT_STATUS_NO_MEMORY;
1282 }
1283
1284 result->sam_account = sampass;
1285 result->unix_name = talloc_strdup(result, unix_username);
1286 result->uid = pwd->pw_uid;
1287 result->gid = pwd->pw_gid;
1288
1289 status = pdb_enum_group_memberships(result, sampass,
1290 &result->sids, &gids,
1291 &result->num_sids);
1292
1293 if (!NT_STATUS_IS_OK(status)) {
1294 DEBUG(10, ("pdb_enum_group_memberships failed: %s\n",
1295 nt_errstr(status)));
1296 TALLOC_FREE(result);
1297 return status;
1298 }
1299
1300 /* For now we throw away the gids and convert via sid_to_gid
1301 * later. This needs fixing, but I'd like to get the code straight and
1302 * simple first. */
1303 TALLOC_FREE(gids);
1304
1305 *server_info = result;
1306
1307 return NT_STATUS_OK;
1308 }
1309
1310 /***************************************************************************
1311 Make (and fill) a user_info struct for a guest login.
1312 This *must* succeed for smbd to start. If there is no mapping entry for
1313 the guest gid, then create one.
1314 ***************************************************************************/
1315
1316 static NTSTATUS make_new_server_info_guest(auth_serversupplied_info **server_info)
1317 {
1318 NTSTATUS status;
1319 struct samu *sampass = NULL;
1320 DOM_SID guest_sid;
1321 BOOL ret;
1322 static const char zeros[16];
1323
1324 if ( !(sampass = samu_new( NULL )) ) {
1325 return NT_STATUS_NO_MEMORY;
1326 }
1327
1328 sid_copy(&guest_sid, get_global_sam_sid());
1329 sid_append_rid(&guest_sid, DOMAIN_USER_RID_GUEST);
1330
1331 become_root();
1332 ret = pdb_getsampwsid(sampass, &guest_sid);
1333 unbecome_root();
1334
1335 if (!ret) {
1336 TALLOC_FREE(sampass);
1337 return NT_STATUS_NO_SUCH_USER;
1338 }
1339
1340 status = make_server_info_sam(server_info, sampass);
1341 if (!NT_STATUS_IS_OK(status)) {
1342 TALLOC_FREE(sampass);
1343 return status;
1344 }
1345
1346 (*server_info)->guest = True;
1347
1348 status = create_local_token(*server_info);
1349 if (!NT_STATUS_IS_OK(status)) {
1350 DEBUG(10, ("create_local_token failed: %s\n",
1351 nt_errstr(status)));
1352 return status;
1353 }
1354
1355 /* annoying, but the Guest really does have a session key, and it is
1356 all zeros! */
1357 (*server_info)->user_session_key = data_blob(zeros, sizeof(zeros));
1358 (*server_info)->lm_session_key = data_blob(zeros, sizeof(zeros));
1359
1360 return NT_STATUS_OK;
1361 }
1362
1363 static auth_serversupplied_info *copy_serverinfo(auth_serversupplied_info *src)
1364 {
1365 auth_serversupplied_info *dst;
1366
1367 dst = make_server_info(NULL);
1368 if (dst == NULL) {
1369 return NULL;
1370 }
1371
1372 dst->guest = src->guest;
1373 dst->uid = src->uid;
1374 dst->gid = src->gid;
1375 dst->n_groups = src->n_groups;
1376 if (src->n_groups != 0) {
1377 dst->groups = talloc_memdup(dst, src->groups,
1378 sizeof(gid_t)*dst->n_groups);
1379 } else {
1380 dst->groups = NULL;
1381 }
1382
1383 if (src->ptok) {
1384 dst->ptok = dup_nt_token(dst, src->ptok);
1385 if (!dst->ptok) {
1386 TALLOC_FREE(dst);
1387 return NULL;
1388 }
1389 }
1390
1391 dst->user_session_key = data_blob_talloc( dst, src->user_session_key.data,
1392 src->user_session_key.length);
1393
1394 dst->lm_session_key = data_blob_talloc(dst, src->lm_session_key.data,
1395 src->lm_session_key.length);
1396
1397 dst->sam_account = samu_new(NULL);
1398 if (!dst->sam_account) {
1399 TALLOC_FREE(dst);
1400 return NULL;
1401 }
1402
1403 if (!pdb_copy_sam_account(dst->sam_account, src->sam_account)) {
1404 TALLOC_FREE(dst);
1405 return NULL;
1406 }
1407
1408 dst->pam_handle = NULL;
1409 dst->unix_name = talloc_strdup(dst, src->unix_name);
1410 if (!dst->unix_name) {
1411 TALLOC_FREE(dst);
1412 return NULL;
1413 }
1414
1415 return dst;
1416 }
1417
1418 static auth_serversupplied_info *guest_info = NULL;
1419
1420 BOOL init_guest_info(void)
1421 {
1422 if (guest_info != NULL)
1423 return True;
1424
1425 return NT_STATUS_IS_OK(make_new_server_info_guest(&guest_info));
1426 }
1427
1428 NTSTATUS make_server_info_guest(auth_serversupplied_info **server_info)
1429 {
1430 *server_info = copy_serverinfo(guest_info);
1431 return (*server_info != NULL) ? NT_STATUS_OK : NT_STATUS_NO_MEMORY;
1432 }
1433
1434 /***************************************************************************
1435 Purely internal function for make_server_info_info3
1436 Fill the sam account from getpwnam
1437 ***************************************************************************/
1438 static NTSTATUS fill_sam_account(TALLOC_CTX *mem_ctx,
1439 const char *domain,
1440 const char *username,
1441 char **found_username,
1442 uid_t *uid, gid_t *gid,
1443 struct samu *account,
1444 BOOL *username_was_mapped)
1445 {
1446 NTSTATUS nt_status;
1447 fstring dom_user, lower_username;
1448 fstring real_username;
1449 struct passwd *passwd;
1450
1451 fstrcpy( lower_username, username );
1452 strlower_m( lower_username );
1453
1454 fstr_sprintf(dom_user, "%s%c%s", domain, *lp_winbind_separator(),
1455 lower_username);
1456
1457 /* Get the passwd struct. Try to create the account is necessary. */
1458
1459 *username_was_mapped = map_username( dom_user );
1460
1461 if ( !(passwd = smb_getpwnam( NULL, dom_user, real_username, True )) )
1462 return NT_STATUS_NO_SUCH_USER;
1463
1464 *uid = passwd->pw_uid;
1465 *gid = passwd->pw_gid;
1466
1467 /* This is pointless -- there is no suport for differing
1468 unix and windows names. Make sure to always store the
1469 one we actually looked up and succeeded. Have I mentioned
1470 why I hate the 'winbind use default domain' parameter?
1471 --jerry */
1472
1473 *found_username = talloc_strdup( mem_ctx, real_username );
1474
1475 DEBUG(5,("fill_sam_account: located username was [%s]\n", *found_username));
1476
1477 nt_status = samu_set_unix( account, passwd );
1478
1479 TALLOC_FREE(passwd);
1480
1481 return nt_status;
1482 }
1483
1484 /****************************************************************************
1485 Wrapper to allow the getpwnam() call to strip the domain name and
1486 try again in case a local UNIX user is already there. Also run through
1487 the username if we fallback to the username only.
1488 ****************************************************************************/
1489
1490 struct passwd *smb_getpwnam( TALLOC_CTX *mem_ctx, char *domuser,
1491 fstring save_username, BOOL create )
1492 {
1493 struct passwd *pw = NULL;
1494 char *p;
1495 fstring username;
1496
1497 /* we only save a copy of the username it has been mangled
1498 by winbindd use default domain */
1499
1500 save_username[0] = '\0';
1501
1502 /* don't call map_username() here since it has to be done higher
1503 up the stack so we don't call it mutliple times */
1504
1505 fstrcpy( username, domuser );
1506
1507 p = strchr_m( username, *lp_winbind_separator() );
1508
1509 /* code for a DOMAIN\user string */
1510
1511 if ( p ) {
1512 fstring strip_username;
1513
1514 pw = Get_Pwnam_alloc( mem_ctx, domuser );
1515 if ( pw ) {
1516 /* make sure we get the case of the username correct */
1517 /* work around 'winbind use default domain = yes' */
1518
1519 if ( !strchr_m( pw->pw_name, *lp_winbind_separator() ) ) {
1520 char *domain;
1521
1522 /* split the domain and username into 2 strings */
1523 *p = '\0';
1524 domain = username;
1525
1526 fstr_sprintf(save_username, "%s%c%s", domain, *lp_winbind_separator(), pw->pw_name);
1527 }
1528 else
1529 fstrcpy( save_username, pw->pw_name );
1530
1531 /* whew -- done! */
1532 return pw;
1533 }
1534
1535 /* setup for lookup of just the username */
1536 /* remember that p and username are overlapping memory */
1537
1538 p++;
1539 fstrcpy( strip_username, p );
1540 fstrcpy( username, strip_username );
1541 }
1542
1543 /* just lookup a plain username */
1544
1545 pw = Get_Pwnam_alloc(mem_ctx, username);
1546
1547 /* Create local user if requested but only if winbindd
1548 is not running. We need to protect against cases
1549 where winbindd is failing and then prematurely
1550 creating users in /etc/passwd */
1551
1552 if ( !pw && create && !winbind_ping() ) {
1553 /* Don't add a machine account. */
1554 if (username[strlen(username)-1] == '$')
1555 return NULL;
1556
1557 smb_create_user(NULL, username, NULL);
1558 pw = Get_Pwnam_alloc(mem_ctx, username);
1559 }
1560
1561 /* one last check for a valid passwd struct */
1562
1563 if ( pw )
1564 fstrcpy( save_username, pw->pw_name );
1565
1566 return pw;
1567 }
1568
1569 /***************************************************************************
1570 Make a server_info struct from the info3 returned by a domain logon
1571 ***************************************************************************/
1572
1573 NTSTATUS make_server_info_info3(TALLOC_CTX *mem_ctx,
1574 const char *sent_nt_username,
1575 const char *domain,
1576 auth_serversupplied_info **server_info,
1577 NET_USER_INFO_3 *info3)
1578 {
1579 static const char zeros[16];
1580
1581 NTSTATUS nt_status = NT_STATUS_OK;
1582 char *found_username;
1583 const char *nt_domain;
1584 const char *nt_username;
1585 struct samu *sam_account = NULL;
1586 DOM_SID user_sid;
1587 DOM_SID group_sid;
1588 BOOL username_was_mapped;
1589
1590 uid_t uid;
1591 gid_t gid;
1592
1593 size_t i;
1594
1595 auth_serversupplied_info *result;
1596
1597 /*
1598 Here is where we should check the list of
1599 trusted domains, and verify that the SID
1600 matches.
1601 */
1602
1603 sid_copy(&user_sid, &info3->dom_sid.sid);
1604 if (!sid_append_rid(&user_sid, info3->user_rid)) {
1605 return NT_STATUS_INVALID_PARAMETER;
1606 }
1607
1608 sid_copy(&group_sid, &info3->dom_sid.sid);
1609 if (!sid_append_rid(&group_sid, info3->group_rid)) {
1610 return NT_STATUS_INVALID_PARAMETER;
1611 }
1612
1613 if (!(nt_username = unistr2_tdup(mem_ctx, &(info3->uni_user_name)))) {
1614 /* If the server didn't give us one, just use the one we sent
1615 * them */
1616 nt_username = sent_nt_username;
1617 }
1618
1619 if (!(nt_domain = unistr2_tdup(mem_ctx, &(info3->uni_logon_dom)))) {
1620 /* If the server didn't give us one, just use the one we sent
1621 * them */
1622 nt_domain = domain;
1623 }
1624
1625 /* try to fill the SAM account.. If getpwnam() fails, then try the
1626 add user script (2.2.x behavior).
1627
1628 We use the _unmapped_ username here in an attempt to provide
1629 consistent username mapping behavior between kerberos and NTLM[SSP]
1630 authentication in domain mode security. I.E. Username mapping
1631 should be applied to the fully qualified username
1632 (e.g. DOMAIN\user) and not just the login name. Yes this means we
1633 called map_username() unnecessarily in make_user_info_map() but
1634 that is how the current code is designed. Making the change here
1635 is the least disruptive place. -- jerry */
1636
1637 if ( !(sam_account = samu_new( NULL )) ) {
1638 return NT_STATUS_NO_MEMORY;
1639 }
1640
1641 /* this call will try to create the user if necessary */
1642
1643 nt_status = fill_sam_account(mem_ctx, nt_domain, sent_nt_username,
1644 &found_username, &uid, &gid, sam_account,
1645 &username_was_mapped);
1646
1647
1648 /* if we still don't have a valid unix account check for
1649 'map to guest = bad uid' */
1650
1651 if (!NT_STATUS_IS_OK(nt_status)) {
1652 TALLOC_FREE( sam_account );
1653 if ( lp_map_to_guest() == MAP_TO_GUEST_ON_BAD_UID ) {
1654 make_server_info_guest(server_info);
1655 return NT_STATUS_OK;
1656 }
1657 return nt_status;
1658 }
1659
1660 if (!pdb_set_nt_username(sam_account, nt_username, PDB_CHANGED)) {
1661 TALLOC_FREE(sam_account);
1662 return NT_STATUS_NO_MEMORY;
1663 }
1664
1665 if (!pdb_set_username(sam_account, nt_username, PDB_CHANGED)) {
1666 TALLOC_FREE(sam_account);
1667 return NT_STATUS_NO_MEMORY;
1668 }
1669
1670 if (!pdb_set_domain(sam_account, nt_domain, PDB_CHANGED)) {
1671 TALLOC_FREE(sam_account);
1672 return NT_STATUS_NO_MEMORY;
1673 }
1674
1675 if (!pdb_set_user_sid(sam_account, &user_sid, PDB_CHANGED)) {
1676 TALLOC_FREE(sam_account);
1677 return NT_STATUS_UNSUCCESSFUL;
1678 }
1679
1680 if (!pdb_set_group_sid(sam_account, &group_sid, PDB_CHANGED)) {
1681 TALLOC_FREE(sam_account);
1682 return NT_STATUS_UNSUCCESSFUL;
1683 }
1684
1685 if (!pdb_set_fullname(sam_account,
1686 unistr2_static(&(info3->uni_full_name)),
1687 PDB_CHANGED)) {
1688 TALLOC_FREE(sam_account);
1689 return NT_STATUS_NO_MEMORY;
1690 }
1691
1692 if (!pdb_set_logon_script(sam_account,
1693 unistr2_static(&(info3->uni_logon_script)),
1694 PDB_CHANGED)) {
1695 TALLOC_FREE(sam_account);
1696 return NT_STATUS_NO_MEMORY;
1697 }
1698
1699 if (!pdb_set_profile_path(sam_account,
1700 unistr2_static(&(info3->uni_profile_path)),
1701 PDB_CHANGED)) {
1702 TALLOC_FREE(sam_account);
1703 return NT_STATUS_NO_MEMORY;
1704 }
1705
1706 if (!pdb_set_homedir(sam_account,
1707 unistr2_static(&(info3->uni_home_dir)),
1708 PDB_CHANGED)) {
1709 TALLOC_FREE(sam_account);
1710 return NT_STATUS_NO_MEMORY;
1711 }
1712
1713 if (!pdb_set_dir_drive(sam_account,
1714 unistr2_static(&(info3->uni_dir_drive)),
1715 PDB_CHANGED)) {
1716 TALLOC_FREE(sam_account);
1717 return NT_STATUS_NO_MEMORY;
1718 }
1719
1720 if (!pdb_set_acct_ctrl(sam_account, info3->acct_flags, PDB_CHANGED)) {
1721 TALLOC_FREE(sam_account);
1722 return NT_STATUS_NO_MEMORY;
1723 }
1724
1725 result = make_server_info(NULL);
1726 if (result == NULL) {
1727 DEBUG(4, ("make_server_info failed!\n"));
1728 TALLOC_FREE(sam_account);
1729 return NT_STATUS_NO_MEMORY;
1730 }
1731
1732 /* save this here to _net_sam_logon() doesn't fail (it assumes a
1733 valid struct samu) */
1734
1735 result->sam_account = sam_account;
1736 result->unix_name = talloc_strdup(result, found_username);
1737
1738 /* Fill in the unix info we found on the way */
1739
1740 result->uid = uid;
1741 result->gid = gid;
1742
1743 /* Create a 'combined' list of all SIDs we might want in the SD */
1744
1745 result->num_sids = 0;
1746 result->sids = NULL;
1747
1748 /* and create (by appending rids) the 'domain' sids */
1749
1750 for (i = 0; i < info3->num_groups2; i++) {
1751 DOM_SID sid;
1752 if (!sid_compose(&sid, &info3->dom_sid.sid,
1753 info3->gids[i].g_rid)) {
1754 DEBUG(3,("could not append additional group rid "
1755 "0x%x\n", info3->gids[i].g_rid));
1756 TALLOC_FREE(result);
1757 return NT_STATUS_INVALID_PARAMETER;
1758 }
1759 add_sid_to_array(result, &sid, &result->sids,
1760 &result->num_sids);
1761 }
1762
1763 /* Copy 'other' sids. We need to do sid filtering here to
1764 prevent possible elevation of privileges. See:
1765
1766 http://www.microsoft.com/windows2000/techinfo/administration/security/sidfilter.asp
1767 */
1768
1769 for (i = 0; i < info3->num_other_sids; i++) {
1770 add_sid_to_array(result, &info3->other_sids[i].sid,
1771 &result->sids,
1772 &result->num_sids);
1773 }
1774
1775 result->login_server = unistr2_tdup(result,
1776 &(info3->uni_logon_srv));
1777
1778 /* ensure we are never given NULL session keys */
1779
1780 if (memcmp(info3->user_sess_key, zeros, sizeof(zeros)) == 0) {
1781 result->user_session_key = data_blob(NULL, 0);
1782 } else {
1783 result->user_session_key = data_blob_talloc(
1784 result, info3->user_sess_key,
1785 sizeof(info3->user_sess_key));
1786 }
1787
1788 if (memcmp(info3->lm_sess_key, zeros, 8) == 0) {
1789 result->lm_session_key = data_blob(NULL, 0);
1790 } else {
1791 result->lm_session_key = data_blob_talloc(
1792 result, info3->lm_sess_key,
1793 sizeof(info3->lm_sess_key));
1794 }
1795
1796 result->was_mapped = username_was_mapped;
1797
1798 *server_info = result;
1799
1800 return NT_STATUS_OK;
1801 }
1802
1803 /***************************************************************************
1804 Free a user_info struct
1805 ***************************************************************************/
1806
1807 void free_user_info(auth_usersupplied_info **user_info)
1808 {
1809 DEBUG(5,("attempting to free (and zero) a user_info structure\n"));
1810 if (*user_info != NULL) {
1811 if ((*user_info)->smb_name) {
1812 DEBUG(10,("structure was created for %s\n",
1813 (*user_info)->smb_name));
1814 }
1815 SAFE_FREE((*user_info)->smb_name);
1816 SAFE_FREE((*user_info)->internal_username);
1817 SAFE_FREE((*user_info)->client_domain);
1818 SAFE_FREE((*user_info)->domain);
1819 SAFE_FREE((*user_info)->wksta_name);
1820 data_blob_free(&(*user_info)->lm_resp);
1821 data_blob_free(&(*user_info)->nt_resp);
1822 data_blob_clear_free(&(*user_info)->lm_interactive_pwd);
1823 data_blob_clear_free(&(*user_info)->nt_interactive_pwd);
1824 data_blob_clear_free(&(*user_info)->plaintext_password);
1825 ZERO_STRUCT(**user_info);
1826 }
1827 SAFE_FREE(*user_info);
1828 }
1829
1830 /***************************************************************************
1831 Make an auth_methods struct
1832 ***************************************************************************/
1833
1834 BOOL make_auth_methods(struct auth_context *auth_context, auth_methods **auth_method)
1835 {
1836 if (!auth_context) {
1837 smb_panic("no auth_context supplied to "
1838 "make_auth_methods()!\n");
1839 }
1840
1841 if (!auth_method) {
1842 smb_panic("make_auth_methods: pointer to auth_method pointer "
1843 "is NULL!\n");
1844 }
1845
1846 *auth_method = TALLOC_P(auth_context->mem_ctx, auth_methods);
1847 if (!*auth_method) {
1848 DEBUG(0,("make_auth_method: malloc failed!\n"));
1849 return False;
1850 }
1851 ZERO_STRUCTP(*auth_method);
1852
1853 return True;
1854 }
1855
1856 /****************************************************************************
1857 Duplicate a SID token.
1858 ****************************************************************************/
1859
1860 NT_USER_TOKEN *dup_nt_token(TALLOC_CTX *mem_ctx, NT_USER_TOKEN *ptoken)
1861 {
1862 NT_USER_TOKEN *token;
1863
1864 if (!ptoken)
1865 return NULL;
1866
1867 token = TALLOC_P(mem_ctx, NT_USER_TOKEN);
1868 if (token == NULL) {
1869 DEBUG(0, ("talloc failed\n"));
1870 return NULL;
1871 }
1872
1873 token->user_sids = talloc_memdup(token, ptoken->user_sids,
1874 sizeof(DOM_SID) * ptoken->num_sids );
1875
1876 if ((ptoken->user_sids != NULL) && (token->user_sids == NULL)) {
1877 DEBUG(0, ("talloc_memdup failed\n"));
1878 TALLOC_FREE(token);
1879 return NULL;
1880 }
1881
1882 token->num_sids = ptoken->num_sids;
1883
1884 /* copy the privileges; don't consider failure to be critical here */
1885
1886 if ( !se_priv_copy( &token->privileges, &ptoken->privileges ) ) {
1887 DEBUG(0,("dup_nt_token: Failure to copy SE_PRIV!. "
1888 "Continuing with 0 privileges assigned.\n"));
1889 }
1890
1891 return token;
1892 }
1893
1894 /****************************************************************************
1895 Check for a SID in an NT_USER_TOKEN
1896 ****************************************************************************/
1897
1898 BOOL nt_token_check_sid ( const DOM_SID *sid, const NT_USER_TOKEN *token )
1899 {
1900 int i;
1901
1902 if ( !sid || !token )
1903 return False;
1904
1905 for ( i=0; i<token->num_sids; i++ ) {
1906 if ( sid_equal( sid, &token->user_sids[i] ) )
1907 return True;
1908 }
1909
1910 return False;
1911 }
1912
1913 BOOL nt_token_check_domain_rid( NT_USER_TOKEN *token, uint32 rid )
1914 {
1915 DOM_SID domain_sid;
1916
1917 /* if we are a domain member, the get the domain SID, else for
1918 a DC or standalone server, use our own SID */
1919
1920 if ( lp_server_role() == ROLE_DOMAIN_MEMBER ) {
1921 if ( !secrets_fetch_domain_sid( lp_workgroup(),
1922 &domain_sid ) ) {
1923 DEBUG(1,("nt_token_check_domain_rid: Cannot lookup "
1924 "SID for domain [%s]\n", lp_workgroup()));
1925 return False;
1926 }
1927 }
1928 else
1929 sid_copy( &domain_sid, get_global_sam_sid() );
1930
1931 sid_append_rid( &domain_sid, rid );
1932
1933 return nt_token_check_sid( &domain_sid, token );\
1934 }
1935
1936 /**
1937 * Verify whether or not given domain is trusted.
1938 *
1939 * @param domain_name name of the domain to be verified
1940 * @return true if domain is one of the trusted once or
1941 * false if otherwise
1942 **/
1943
1944 BOOL is_trusted_domain(const char* dom_name)
1945 {
1946 DOM_SID trustdom_sid;
1947 BOOL ret;
1948
1949 /* no trusted domains for a standalone server */
1950
1951 if ( lp_server_role() == ROLE_STANDALONE )
1952 return False;
1953
1954 /* if we are a DC, then check for a direct trust relationships */
1955
1956 if ( IS_DC ) {
1957 become_root();
1958 DEBUG (5,("is_trusted_domain: Checking for domain trust with "
1959 "[%s]\n", dom_name ));
1960 ret = secrets_fetch_trusted_domain_password(dom_name, NULL,
1961 NULL, NULL);
1962 unbecome_root();
1963 if (ret)
1964 return True;
1965 }
1966 else {
1967 NSS_STATUS result;
1968
1969 /* If winbind is around, ask it */
1970
1971 result = wb_is_trusted_domain(dom_name);
1972
1973 if (result == NSS_STATUS_SUCCESS) {
1974 return True;
1975 }
1976
1977 if (result == NSS_STATUS_NOTFOUND) {
1978 /* winbind could not find the domain */
1979 return False;
1980 }
1981
1982 /* The only other possible result is that winbind is not up
1983 and running. We need to update the trustdom_cache
1984 ourselves */
1985
1986 update_trustdom_cache();
1987 }
1988
1989 /* now the trustdom cache should be available a DC could still
1990 * have a transitive trust so fall back to the cache of trusted
1991 * domains (like a domain member would use */
1992
1993 if ( trustdom_cache_fetch(dom_name, &trustdom_sid) ) {
1994 return True;
1995 }
1996
1997 return False;
1998 }
1999
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