source: trunk-3.0/source/auth/auth_util.c@ 103

Last change on this file since 103 was 44, checked in by Paul Smedley, 18 years ago

Update source to 3.0.25b
File size: 62.5 KB
Line 
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
30static struct nt_user_token *create_local_nt_token(TALLOC_CTX *mem_ctx,
31 const DOM_SID *user_sid,
32 BOOL is_guest,
33 int num_groupsids,
34 const DOM_SID *groupsids);
35
36/****************************************************************************
37 Create a UNIX user on demand.
38****************************************************************************/
39
40static int smb_create_user(const char *domain, const char *unix_username, const char *homedir)
41{
42 pstring add_script;
43 int ret;
44
45 pstrcpy(add_script, lp_adduser_script());
46 if (! *add_script)
47 return -1;
48 all_string_sub(add_script, "%u", unix_username, sizeof(pstring));
49 if (domain)
50 all_string_sub(add_script, "%D", domain, sizeof(pstring));
51 if (homedir)
52 all_string_sub(add_script, "%H", homedir, sizeof(pstring));
53 ret = smbrun(add_script,NULL);
54 flush_pwnam_cache();
55 DEBUG(ret ? 0 : 3,("smb_create_user: Running the command `%s' gave %d\n",add_script,ret));
56 return ret;
57}
58
59/****************************************************************************
60 Create an auth_usersupplied_data structure
61****************************************************************************/
62
63static NTSTATUS make_user_info(auth_usersupplied_info **user_info,
64 const char *smb_name,
65 const char *internal_username,
66 const char *client_domain,
67 const char *domain,
68 const char *wksta_name,
69 DATA_BLOB *lm_pwd, DATA_BLOB *nt_pwd,
70 DATA_BLOB *lm_interactive_pwd, DATA_BLOB *nt_interactive_pwd,
71 DATA_BLOB *plaintext,
72 BOOL encrypted)
73{
74
75 DEBUG(5,("attempting to make a user_info for %s (%s)\n", internal_username, smb_name));
76
77 *user_info = SMB_MALLOC_P(auth_usersupplied_info);
78 if (*user_info == NULL) {
79 DEBUG(0,("malloc failed for user_info (size %lu)\n", (unsigned long)sizeof(*user_info)));
80 return NT_STATUS_NO_MEMORY;
81 }
82
83 ZERO_STRUCTP(*user_info);
84
85 DEBUG(5,("making strings for %s's user_info struct\n", internal_username));
86
87 (*user_info)->smb_name = SMB_STRDUP(smb_name);
88 if ((*user_info)->smb_name == NULL) {
89 free_user_info(user_info);
90 return NT_STATUS_NO_MEMORY;
91 }
92
93 (*user_info)->internal_username = SMB_STRDUP(internal_username);
94 if ((*user_info)->internal_username == NULL) {
95 free_user_info(user_info);
96 return NT_STATUS_NO_MEMORY;
97 }
98
99 (*user_info)->domain = SMB_STRDUP(domain);
100 if ((*user_info)->domain == NULL) {
101 free_user_info(user_info);
102 return NT_STATUS_NO_MEMORY;
103 }
104
105 (*user_info)->client_domain = SMB_STRDUP(client_domain);
106 if ((*user_info)->client_domain == NULL) {
107 free_user_info(user_info);
108 return NT_STATUS_NO_MEMORY;
109 }
110
111 (*user_info)->wksta_name = SMB_STRDUP(wksta_name);
112 if ((*user_info)->wksta_name == NULL) {
113 free_user_info(user_info);
114 return NT_STATUS_NO_MEMORY;
115 }
116
117 DEBUG(5,("making blobs for %s's user_info struct\n", internal_username));
118
119 if (lm_pwd)
120 (*user_info)->lm_resp = data_blob(lm_pwd->data, lm_pwd->length);
121 if (nt_pwd)
122 (*user_info)->nt_resp = data_blob(nt_pwd->data, nt_pwd->length);
123 if (lm_interactive_pwd)
124 (*user_info)->lm_interactive_pwd = data_blob(lm_interactive_pwd->data, lm_interactive_pwd->length);
125 if (nt_interactive_pwd)
126 (*user_info)->nt_interactive_pwd = data_blob(nt_interactive_pwd->data, nt_interactive_pwd->length);
127
128 if (plaintext)
129 (*user_info)->plaintext_password = data_blob(plaintext->data, plaintext->length);
130
131 (*user_info)->encrypted = encrypted;
132
133 (*user_info)->logon_parameters = 0;
134
135 DEBUG(10,("made an %sencrypted user_info for %s (%s)\n", encrypted ? "":"un" , internal_username, smb_name));
136
137 return NT_STATUS_OK;
138}
139
140/****************************************************************************
141 Create an auth_usersupplied_data structure after appropriate mapping.
142****************************************************************************/
143
144NTSTATUS make_user_info_map(auth_usersupplied_info **user_info,
145 const char *smb_name,
146 const char *client_domain,
147 const char *wksta_name,
148 DATA_BLOB *lm_pwd, DATA_BLOB *nt_pwd,
149 DATA_BLOB *lm_interactive_pwd, DATA_BLOB *nt_interactive_pwd,
150 DATA_BLOB *plaintext,
151 BOOL encrypted)
152{
153 const char *domain;
154 NTSTATUS result;
155 BOOL was_mapped;
156 fstring internal_username;
157 fstrcpy(internal_username, smb_name);
158 was_mapped = map_username(internal_username);
159
160 DEBUG(5, ("make_user_info_map: Mapping user [%s]\\[%s] from workstation [%s]\n",
161 client_domain, smb_name, wksta_name));
162
163 /* don't allow "" as a domain, fixes a Win9X bug
164 where it doens't supply a domain for logon script
165 'net use' commands. */
166
167 if ( *client_domain )
168 domain = client_domain;
169 else
170 domain = lp_workgroup();
171
172 /* do what win2k does. Always map unknown domains to our own
173 and let the "passdb backend" handle unknown users. */
174
175 if ( !is_trusted_domain(domain) && !strequal(domain, get_global_sam_name()) )
176 domain = my_sam_name();
177
178 /* we know that it is a trusted domain (and we are allowing them) or it is our domain */
179
180 result = make_user_info(user_info, smb_name, internal_username,
181 client_domain, domain, wksta_name,
182 lm_pwd, nt_pwd,
183 lm_interactive_pwd, nt_interactive_pwd,
184 plaintext, encrypted);
185 if (NT_STATUS_IS_OK(result)) {
186 (*user_info)->was_mapped = was_mapped;
187 }
188 return result;
189}
190
191/****************************************************************************
192 Create an auth_usersupplied_data, making the DATA_BLOBs here.
193 Decrypt and encrypt the passwords.
194****************************************************************************/
195
196BOOL make_user_info_netlogon_network(auth_usersupplied_info **user_info,
197 const char *smb_name,
198 const char *client_domain,
199 const char *wksta_name,
200 uint32 logon_parameters,
201 const uchar *lm_network_pwd,
202 int lm_pwd_len,
203 const uchar *nt_network_pwd,
204 int nt_pwd_len)
205{
206 BOOL ret;
207 NTSTATUS status;
208 DATA_BLOB lm_blob = data_blob(lm_network_pwd, lm_pwd_len);
209 DATA_BLOB nt_blob = data_blob(nt_network_pwd, nt_pwd_len);
210
211 status = make_user_info_map(user_info,
212 smb_name, client_domain,
213 wksta_name,
214 lm_pwd_len ? &lm_blob : NULL,
215 nt_pwd_len ? &nt_blob : NULL,
216 NULL, NULL, NULL,
217 True);
218
219 if (NT_STATUS_IS_OK(status)) {
220 (*user_info)->logon_parameters = logon_parameters;
221 }
222 ret = NT_STATUS_IS_OK(status) ? True : False;
223
224 data_blob_free(&lm_blob);
225 data_blob_free(&nt_blob);
226 return ret;
227}
228
229/****************************************************************************
230 Create an auth_usersupplied_data, making the DATA_BLOBs here.
231 Decrypt and encrypt the passwords.
232****************************************************************************/
233
234BOOL make_user_info_netlogon_interactive(auth_usersupplied_info **user_info,
235 const char *smb_name,
236 const char *client_domain,
237 const char *wksta_name,
238 uint32 logon_parameters,
239 const uchar chal[8],
240 const uchar lm_interactive_pwd[16],
241 const uchar nt_interactive_pwd[16],
242 const uchar *dc_sess_key)
243{
244 char lm_pwd[16];
245 char nt_pwd[16];
246 unsigned char local_lm_response[24];
247 unsigned char local_nt_response[24];
248 unsigned char key[16];
249
250 ZERO_STRUCT(key);
251 memcpy(key, dc_sess_key, 8);
252
253 if (lm_interactive_pwd)
254 memcpy(lm_pwd, lm_interactive_pwd, sizeof(lm_pwd));
255
256 if (nt_interactive_pwd)
257 memcpy(nt_pwd, nt_interactive_pwd, sizeof(nt_pwd));
258
259#ifdef DEBUG_PASSWORD
260 DEBUG(100,("key:"));
261 dump_data(100, (char *)key, sizeof(key));
262
263 DEBUG(100,("lm owf password:"));
264 dump_data(100, lm_pwd, sizeof(lm_pwd));
265
266 DEBUG(100,("nt owf password:"));
267 dump_data(100, nt_pwd, sizeof(nt_pwd));
268#endif
269
270 if (lm_interactive_pwd)
271 SamOEMhash((uchar *)lm_pwd, key, sizeof(lm_pwd));
272
273 if (nt_interactive_pwd)
274 SamOEMhash((uchar *)nt_pwd, key, sizeof(nt_pwd));
275
276#ifdef DEBUG_PASSWORD
277 DEBUG(100,("decrypt of lm owf password:"));
278 dump_data(100, lm_pwd, sizeof(lm_pwd));
279
280 DEBUG(100,("decrypt of nt owf password:"));
281 dump_data(100, nt_pwd, sizeof(nt_pwd));
282#endif
283
284 if (lm_interactive_pwd)
285 SMBOWFencrypt((const unsigned char *)lm_pwd, chal,
286 local_lm_response);
287
288 if (nt_interactive_pwd)
289 SMBOWFencrypt((const unsigned char *)nt_pwd, chal,
290 local_nt_response);
291
292 /* Password info paranoia */
293 ZERO_STRUCT(key);
294
295 {
296 BOOL ret;
297 NTSTATUS nt_status;
298 DATA_BLOB local_lm_blob;
299 DATA_BLOB local_nt_blob;
300
301 DATA_BLOB lm_interactive_blob;
302 DATA_BLOB nt_interactive_blob;
303
304 if (lm_interactive_pwd) {
305 local_lm_blob = data_blob(local_lm_response,
306 sizeof(local_lm_response));
307 lm_interactive_blob = data_blob(lm_pwd,
308 sizeof(lm_pwd));
309 ZERO_STRUCT(lm_pwd);
310 }
311
312 if (nt_interactive_pwd) {
313 local_nt_blob = data_blob(local_nt_response,
314 sizeof(local_nt_response));
315 nt_interactive_blob = data_blob(nt_pwd,
316 sizeof(nt_pwd));
317 ZERO_STRUCT(nt_pwd);
318 }
319
320 nt_status = make_user_info_map(
321 user_info,
322 smb_name, client_domain, wksta_name,
323 lm_interactive_pwd ? &local_lm_blob : NULL,
324 nt_interactive_pwd ? &local_nt_blob : NULL,
325 lm_interactive_pwd ? &lm_interactive_blob : NULL,
326 nt_interactive_pwd ? &nt_interactive_blob : NULL,
327 NULL, True);
328
329 if (NT_STATUS_IS_OK(nt_status)) {
330 (*user_info)->logon_parameters = logon_parameters;
331 }
332
333 ret = NT_STATUS_IS_OK(nt_status) ? True : False;
334 data_blob_free(&local_lm_blob);
335 data_blob_free(&local_nt_blob);
336 data_blob_free(&lm_interactive_blob);
337 data_blob_free(&nt_interactive_blob);
338 return ret;
339 }
340}
341
342
343/****************************************************************************
344 Create an auth_usersupplied_data structure
345****************************************************************************/
346
347BOOL make_user_info_for_reply(auth_usersupplied_info **user_info,
348 const char *smb_name,
349 const char *client_domain,
350 const uint8 chal[8],
351 DATA_BLOB plaintext_password)
352{
353
354 DATA_BLOB local_lm_blob;
355 DATA_BLOB local_nt_blob;
356 NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
357
358 /*
359 * Not encrypted - do so.
360 */
361
362 DEBUG(5,("make_user_info_for_reply: User passwords not in encrypted "
363 "format.\n"));
364
365 if (plaintext_password.data) {
366 unsigned char local_lm_response[24];
367
368#ifdef DEBUG_PASSWORD
369 DEBUG(10,("Unencrypted password (len %d):\n",
370 (int)plaintext_password.length));
371 dump_data(100, (const char *)plaintext_password.data,
372 plaintext_password.length);
373#endif
374
375 SMBencrypt( (const char *)plaintext_password.data,
376 (const uchar*)chal, local_lm_response);
377 local_lm_blob = data_blob(local_lm_response, 24);
378
379 /* We can't do an NT hash here, as the password needs to be
380 case insensitive */
381 local_nt_blob = data_blob(NULL, 0);
382
383 } else {
384 local_lm_blob = data_blob(NULL, 0);
385 local_nt_blob = data_blob(NULL, 0);
386 }
387
388 ret = make_user_info_map(
389 user_info, smb_name, client_domain,
390 get_remote_machine_name(),
391 local_lm_blob.data ? &local_lm_blob : NULL,
392 local_nt_blob.data ? &local_nt_blob : NULL,
393 NULL, NULL,
394 plaintext_password.data ? &plaintext_password : NULL,
395 False);
396
397 data_blob_free(&local_lm_blob);
398 return NT_STATUS_IS_OK(ret) ? True : False;
399}
400
401/****************************************************************************
402 Create an auth_usersupplied_data structure
403****************************************************************************/
404
405NTSTATUS make_user_info_for_reply_enc(auth_usersupplied_info **user_info,
406 const char *smb_name,
407 const char *client_domain,
408 DATA_BLOB lm_resp, DATA_BLOB nt_resp)
409{
410 return make_user_info_map(user_info, smb_name,
411 client_domain,
412 get_remote_machine_name(),
413 lm_resp.data ? &lm_resp : NULL,
414 nt_resp.data ? &nt_resp : NULL,
415 NULL, NULL, NULL,
416 True);
417}
418
419/****************************************************************************
420 Create a guest user_info blob, for anonymous authenticaion.
421****************************************************************************/
422
423BOOL make_user_info_guest(auth_usersupplied_info **user_info)
424{
425 NTSTATUS nt_status;
426
427 nt_status = make_user_info(user_info,
428 "","",
429 "","",
430 "",
431 NULL, NULL,
432 NULL, NULL,
433 NULL,
434 True);
435
436 return NT_STATUS_IS_OK(nt_status) ? True : False;
437}
438
439/****************************************************************************
440 prints a NT_USER_TOKEN to debug output.
441****************************************************************************/
442
443void debug_nt_user_token(int dbg_class, int dbg_lev, NT_USER_TOKEN *token)
444{
445 size_t i;
446
447 if (!token) {
448 DEBUGC(dbg_class, dbg_lev, ("NT user token: (NULL)\n"));
449 return;
450 }
451
452 DEBUGC(dbg_class, dbg_lev,
453 ("NT user token of user %s\n",
454 sid_string_static(&token->user_sids[0]) ));
455 DEBUGADDC(dbg_class, dbg_lev,
456 ("contains %lu SIDs\n", (unsigned long)token->num_sids));
457 for (i = 0; i < token->num_sids; i++)
458 DEBUGADDC(dbg_class, dbg_lev,
459 ("SID[%3lu]: %s\n", (unsigned long)i,
460 sid_string_static(&token->user_sids[i])));
461
462 dump_se_priv( dbg_class, dbg_lev, &token->privileges );
463}
464
465/****************************************************************************
466 prints a UNIX 'token' to debug output.
467****************************************************************************/
468
469void debug_unix_user_token(int dbg_class, int dbg_lev, uid_t uid, gid_t gid,
470 int n_groups, gid_t *groups)
471{
472 int i;
473 DEBUGC(dbg_class, dbg_lev,
474 ("UNIX token of user %ld\n", (long int)uid));
475
476 DEBUGADDC(dbg_class, dbg_lev,
477 ("Primary group is %ld and contains %i supplementary "
478 "groups\n", (long int)gid, n_groups));
479 for (i = 0; i < n_groups; i++)
480 DEBUGADDC(dbg_class, dbg_lev, ("Group[%3i]: %ld\n", i,
481 (long int)groups[i]));
482}
483
484/******************************************************************************
485 Create a token for the root user to be used internally by smbd.
486 This is similar to running under the context of the LOCAL_SYSTEM account
487 in Windows. This is a read-only token. Do not modify it or free() it.
488 Create a copy if your need to change it.
489******************************************************************************/
490
491NT_USER_TOKEN *get_root_nt_token( void )
492{
493 static NT_USER_TOKEN *token = NULL;
494 DOM_SID u_sid, g_sid;
495 struct passwd *pw;
496
497 if ( token )
498 return token;
499
500 if ( !(pw = sys_getpwnam( "root" )) ) {
501 DEBUG(0,("get_root_nt_token: getpwnam\"root\") failed!\n"));
502 return NULL;
503 }
504
505 /* get the user and primary group SIDs; although the
506 BUILTIN\Administrators SId is really the one that matters here */
507
508 uid_to_sid(&u_sid, pw->pw_uid);
509 gid_to_sid(&g_sid, pw->pw_gid);
510
511 token = create_local_nt_token(NULL, &u_sid, False,
512 1, &global_sid_Builtin_Administrators);
513 return token;
514}
515
516static int server_info_dtor(auth_serversupplied_info *server_info)
517{
518 TALLOC_FREE(server_info->sam_account);
519 ZERO_STRUCTP(server_info);
520 return 0;
521}
522
523/***************************************************************************
524 Make a server_info struct. Free with TALLOC_FREE().
525***************************************************************************/
526
527static auth_serversupplied_info *make_server_info(TALLOC_CTX *mem_ctx)
528{
529 struct auth_serversupplied_info *result;
530
531 result = TALLOC_ZERO_P(mem_ctx, auth_serversupplied_info);
532 if (result == NULL) {
533 DEBUG(0, ("talloc failed\n"));
534 return NULL;
535 }
536
537 talloc_set_destructor(result, server_info_dtor);
538
539 /* Initialise the uid and gid values to something non-zero
540 which may save us from giving away root access if there
541 is a bug in allocating these fields. */
542
543 result->uid = -1;
544 result->gid = -1;
545 return result;
546}
547
548/***************************************************************************
549 Make (and fill) a user_info struct from a struct samu
550***************************************************************************/
551
552NTSTATUS make_server_info_sam(auth_serversupplied_info **server_info,
553 struct samu *sampass)
554{
555 NTSTATUS status;
556 struct passwd *pwd;
557 gid_t *gids;
558 auth_serversupplied_info *result;
559 int i;
560 size_t num_gids;
561 DOM_SID unix_group_sid;
562
563
564 if ( !(pwd = getpwnam_alloc(NULL, pdb_get_username(sampass))) ) {
565 DEBUG(1, ("User %s in passdb, but getpwnam() fails!\n",
566 pdb_get_username(sampass)));
567 return NT_STATUS_NO_SUCH_USER;
568 }
569
570 if ( !(result = make_server_info(NULL)) ) {
571 TALLOC_FREE(pwd);
572 return NT_STATUS_NO_MEMORY;
573 }
574
575 result->sam_account = sampass;
576 result->unix_name = talloc_strdup(result, pwd->pw_name);
577 result->gid = pwd->pw_gid;
578 result->uid = pwd->pw_uid;
579
580 TALLOC_FREE(pwd);
581
582 status = pdb_enum_group_memberships(result, sampass,
583 &result->sids, &gids,
584 &result->num_sids);
585
586 if (!NT_STATUS_IS_OK(status)) {
587 DEBUG(10, ("pdb_enum_group_memberships failed: %s\n",
588 nt_errstr(status)));
589 result->sam_account = NULL; /* Don't free on error exit. */
590 TALLOC_FREE(result);
591 return status;
592 }
593
594 /* Add the "Unix Group" SID for each gid to catch mapped groups
595 and their Unix equivalent. This is to solve the backwards
596 compatibility problem of 'valid users = +ntadmin' where
597 ntadmin has been paired with "Domain Admins" in the group
598 mapping table. Otherwise smb.conf would need to be changed
599 to 'valid user = "Domain Admins"'. --jerry */
600
601 num_gids = result->num_sids;
602 for ( i=0; i<num_gids; i++ ) {
603 if ( !gid_to_unix_groups_sid( gids[i], &unix_group_sid ) ) {
604 DEBUG(1,("make_server_info_sam: Failed to create SID "
605 "for gid %d!\n", gids[i]));
606 continue;
607 }
608 if (!add_sid_to_array_unique( result, &unix_group_sid,
609 &result->sids, &result->num_sids )) {
610 result->sam_account = NULL; /* Don't free on error exit. */
611 TALLOC_FREE(result);
612 return NT_STATUS_NO_MEMORY;
613 }
614 }
615
616 /* For now we throw away the gids and convert via sid_to_gid
617 * later. This needs fixing, but I'd like to get the code straight and
618 * simple first. */
619
620 TALLOC_FREE(gids);
621
622 DEBUG(5,("make_server_info_sam: made server info for user %s -> %s\n",
623 pdb_get_username(sampass), result->unix_name));
624
625 *server_info = result;
626
627 return NT_STATUS_OK;
628}
629
630/*
631 * Add alias SIDs from memberships within the partially created token SID list
632 */
633
634static NTSTATUS add_aliases(const DOM_SID *domain_sid,
635 struct nt_user_token *token)
636{
637 uint32 *aliases;
638 size_t i, num_aliases;
639 NTSTATUS status;
640 TALLOC_CTX *tmp_ctx;
641
642 if (!(tmp_ctx = talloc_init("add_aliases"))) {
643 return NT_STATUS_NO_MEMORY;
644 }
645
646 aliases = NULL;
647 num_aliases = 0;
648
649 status = pdb_enum_alias_memberships(tmp_ctx, domain_sid,
650 token->user_sids,
651 token->num_sids,
652 &aliases, &num_aliases);
653
654 if (!NT_STATUS_IS_OK(status)) {
655 DEBUG(10, ("pdb_enum_alias_memberships failed: %s\n",
656 nt_errstr(status)));
657 TALLOC_FREE(tmp_ctx);
658 return status;
659 }
660
661 for (i=0; i<num_aliases; i++) {
662 DOM_SID alias_sid;
663 sid_compose(&alias_sid, domain_sid, aliases[i]);
664 if (!add_sid_to_array_unique(token, &alias_sid,
665 &token->user_sids,
666 &token->num_sids)) {
667 DEBUG(0, ("add_sid_to_array failed\n"));
668 TALLOC_FREE(tmp_ctx);
669 return NT_STATUS_NO_MEMORY;
670 }
671 }
672
673 TALLOC_FREE(tmp_ctx);
674 return NT_STATUS_OK;
675}
676
677static NTSTATUS log_nt_token(TALLOC_CTX *tmp_ctx, NT_USER_TOKEN *token)
678{
679 char *command;
680 char *group_sidstr;
681 size_t i;
682
683 if ((lp_log_nt_token_command() == NULL) ||
684 (strlen(lp_log_nt_token_command()) == 0)) {
685 return NT_STATUS_OK;
686 }
687
688 group_sidstr = talloc_strdup(tmp_ctx, "");
689 for (i=1; i<token->num_sids; i++) {
690 group_sidstr = talloc_asprintf(
691 tmp_ctx, "%s %s", group_sidstr,
692 sid_string_static(&token->user_sids[i]));
693 }
694
695 command = talloc_string_sub(
696 tmp_ctx, lp_log_nt_token_command(),
697 "%s", sid_string_static(&token->user_sids[0]));
698 command = talloc_string_sub(tmp_ctx, command, "%t", group_sidstr);
699
700 if (command == NULL) {
701 return NT_STATUS_NO_MEMORY;
702 }
703
704 DEBUG(8, ("running command: [%s]\n", command));
705 if (smbrun(command, NULL) != 0) {
706 DEBUG(0, ("Could not log NT token\n"));
707 return NT_STATUS_ACCESS_DENIED;
708 }
709
710 return NT_STATUS_OK;
711}
712
713/*******************************************************************
714*******************************************************************/
715
716static NTSTATUS add_builtin_administrators( struct nt_user_token *token )
717{
718 DOM_SID domadm;
719
720 /* nothing to do if we aren't in a domain */
721
722 if ( !(IS_DC || lp_server_role()==ROLE_DOMAIN_MEMBER) ) {
723 return NT_STATUS_OK;
724 }
725
726 /* Find the Domain Admins SID */
727
728 if ( IS_DC ) {
729 sid_copy( &domadm, get_global_sam_sid() );
730 } else {
731 if ( !secrets_fetch_domain_sid( lp_workgroup(), &domadm ) )
732 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
733 }
734 sid_append_rid( &domadm, DOMAIN_GROUP_RID_ADMINS );
735
736 /* Add Administrators if the user beloongs to Domain Admins */
737
738 if ( nt_token_check_sid( &domadm, token ) ) {
739 if (!add_sid_to_array(token, &global_sid_Builtin_Administrators,
740 &token->user_sids, &token->num_sids)) {
741 return NT_STATUS_NO_MEMORY;
742 }
743 }
744
745 return NT_STATUS_OK;
746}
747
748/*******************************************************************
749*******************************************************************/
750
751static NTSTATUS create_builtin_users( void )
752{
753 NTSTATUS status;
754 DOM_SID dom_users;
755
756 status = pdb_create_builtin_alias( BUILTIN_ALIAS_RID_USERS );
757 if ( !NT_STATUS_IS_OK(status) ) {
758 DEBUG(0,("create_builtin_users: Failed to create Users\n"));
759 return status;
760 }
761
762 /* add domain users */
763 if ((IS_DC || (lp_server_role() == ROLE_DOMAIN_MEMBER))
764 && secrets_fetch_domain_sid(lp_workgroup(), &dom_users))
765 {
766 sid_append_rid(&dom_users, DOMAIN_GROUP_RID_USERS );
767 status = pdb_add_aliasmem( &global_sid_Builtin_Users, &dom_users);
768 if ( !NT_STATUS_IS_OK(status) ) {
769 DEBUG(0,("create_builtin_users: Failed to add Domain Users to"
770 " Users\n"));
771 return status;
772 }
773 }
774
775 return NT_STATUS_OK;
776}
777
778/*******************************************************************
779*******************************************************************/
780
781static NTSTATUS create_builtin_administrators( void )
782{
783 NTSTATUS status;
784 DOM_SID dom_admins, root_sid;
785 fstring root_name;
786 enum lsa_SidType type;
787 TALLOC_CTX *ctx;
788 BOOL ret;
789
790 status = pdb_create_builtin_alias( BUILTIN_ALIAS_RID_ADMINS );
791 if ( !NT_STATUS_IS_OK(status) ) {
792 DEBUG(0,("create_builtin_administrators: Failed to create Administrators\n"));
793 return status;
794 }
795
796 /* add domain admins */
797 if ((IS_DC || (lp_server_role() == ROLE_DOMAIN_MEMBER))
798 && secrets_fetch_domain_sid(lp_workgroup(), &dom_admins))
799 {
800 sid_append_rid(&dom_admins, DOMAIN_GROUP_RID_ADMINS);
801 status = pdb_add_aliasmem( &global_sid_Builtin_Administrators, &dom_admins );
802 if ( !NT_STATUS_IS_OK(status) ) {
803 DEBUG(0,("create_builtin_administrators: Failed to add Domain Admins"
804 " Administrators\n"));
805 return status;
806 }
807 }
808
809 /* add root */
810 if ( (ctx = talloc_init("create_builtin_administrators")) == NULL ) {
811 return NT_STATUS_NO_MEMORY;
812 }
813 fstr_sprintf( root_name, "%s\\root", get_global_sam_name() );
814 ret = lookup_name( ctx, root_name, 0, NULL, NULL, &root_sid, &type );
815 TALLOC_FREE( ctx );
816
817 if ( ret ) {
818 status = pdb_add_aliasmem( &global_sid_Builtin_Administrators, &root_sid );
819 if ( !NT_STATUS_IS_OK(status) ) {
820 DEBUG(0,("create_builtin_administrators: Failed to add root"
821 " Administrators\n"));
822 return status;
823 }
824 }
825
826 return NT_STATUS_OK;
827}
828
829/*******************************************************************
830 Create a NT token for the user, expanding local aliases
831*******************************************************************/
832
833static struct nt_user_token *create_local_nt_token(TALLOC_CTX *mem_ctx,
834 const DOM_SID *user_sid,
835 BOOL is_guest,
836 int num_groupsids,
837 const DOM_SID *groupsids)
838{
839 struct nt_user_token *result = NULL;
840 int i;
841 NTSTATUS status;
842 gid_t gid;
843
844 DEBUG(10, ("Create local NT token for %s\n", sid_string_static(user_sid)));
845
846 if (!(result = TALLOC_ZERO_P(mem_ctx, NT_USER_TOKEN))) {
847 DEBUG(0, ("talloc failed\n"));
848 return NULL;
849 }
850
851 /* Add the user and primary group sid */
852
853 if (!add_sid_to_array(result, user_sid,
854 &result->user_sids, &result->num_sids)) {
855 return NULL;
856 }
857
858 /* For guest, num_groupsids may be zero. */
859 if (num_groupsids) {
860 if (!add_sid_to_array(result, &groupsids[0],
861 &result->user_sids, &result->num_sids)) {
862 return NULL;
863 }
864 }
865
866 /* Add in BUILTIN sids */
867
868 if (!add_sid_to_array(result, &global_sid_World,
869 &result->user_sids, &result->num_sids)) {
870 return NULL;
871 }
872 if (!add_sid_to_array(result, &global_sid_Network,
873 &result->user_sids, &result->num_sids)) {
874 return NULL;
875 }
876
877 if (is_guest) {
878 if (!add_sid_to_array(result, &global_sid_Builtin_Guests,
879 &result->user_sids, &result->num_sids)) {
880 return NULL;
881 }
882 } else {
883 if (!add_sid_to_array(result, &global_sid_Authenticated_Users,
884 &result->user_sids, &result->num_sids)) {
885 return NULL;
886 }
887 }
888
889 /* Now the SIDs we got from authentication. These are the ones from
890 * the info3 struct or from the pdb_enum_group_memberships, depending
891 * on who authenticated the user.
892 * Note that we start the for loop at "1" here, we already added the
893 * first group sid as primary above. */
894
895 for (i=1; i<num_groupsids; i++) {
896 if (!add_sid_to_array_unique(result, &groupsids[i],
897 &result->user_sids, &result->num_sids)) {
898 return NULL;
899 }
900 }
901
902 /* Deal with the BUILTIN\Administrators group. If the SID can
903 be resolved then assume that the add_aliasmem( S-1-5-32 )
904 handled it. */
905
906 if ( !sid_to_gid( &global_sid_Builtin_Administrators, &gid ) ) {
907 /* We can only create a mapping if winbind is running
908 and the nested group functionality has been enabled */
909
910 if ( lp_winbind_nested_groups() && winbind_ping() ) {
911 become_root();
912 status = create_builtin_administrators( );
913 if ( !NT_STATUS_IS_OK(status) ) {
914 DEBUG(2,("create_local_nt_token: Failed to create BUILTIN\\Administrators group!\n"));
915 /* don't fail, just log the message */
916 }
917 unbecome_root();
918 }
919 else {
920 status = add_builtin_administrators( result );
921 if ( !NT_STATUS_IS_OK(status) ) {
922 /* just log a complaint but do not fail */
923 DEBUG(3,("create_local_nt_token: failed to check for local Administrators"
924 " membership (%s)\n", nt_errstr(status)));
925 }
926 }
927 }
928
929 /* Deal with the BUILTIN\Users group. If the SID can
930 be resolved then assume that the add_aliasmem( S-1-5-32 )
931 handled it. */
932
933 if ( !sid_to_gid( &global_sid_Builtin_Users, &gid ) ) {
934 /* We can only create a mapping if winbind is running
935 and the nested group functionality has been enabled */
936
937 if ( lp_winbind_nested_groups() && winbind_ping() ) {
938 become_root();
939 status = create_builtin_users( );
940 if ( !NT_STATUS_IS_OK(status) ) {
941 DEBUG(2,("create_local_nt_token: Failed to create BUILTIN\\Users group!\n"));
942 /* don't fail, just log the message */
943 }
944 unbecome_root();
945 }
946 }
947
948 /* Deal with local groups */
949
950 if (lp_winbind_nested_groups()) {
951
952 /* Now add the aliases. First the one from our local SAM */
953
954 status = add_aliases(get_global_sam_sid(), result);
955
956 if (!NT_STATUS_IS_OK(status)) {
957 TALLOC_FREE(result);
958 return NULL;
959 }
960
961 /* Finally the builtin ones */
962
963 status = add_aliases(&global_sid_Builtin, result);
964
965 if (!NT_STATUS_IS_OK(status)) {
966 TALLOC_FREE(result);
967 return NULL;
968 }
969 }
970
971
972 get_privileges_for_sids(&result->privileges, result->user_sids,
973 result->num_sids);
974 return result;
975}
976
977/*
978 * Create the token to use from server_info->sam_account and
979 * server_info->sids (the info3/sam groups). Find the unix gids.
980 */
981
982NTSTATUS create_local_token(auth_serversupplied_info *server_info)
983{
984 TALLOC_CTX *mem_ctx;
985 NTSTATUS status;
986 size_t i;
987
988
989 mem_ctx = talloc_new(NULL);
990 if (mem_ctx == NULL) {
991 DEBUG(0, ("talloc_new failed\n"));
992 return NT_STATUS_NO_MEMORY;
993 }
994
995 /*
996 * If winbind is not around, we can not make much use of the SIDs the
997 * domain controller provided us with. Likewise if the user name was
998 * mapped to some local unix user.
999 */
1000
1001 if (((lp_server_role() == ROLE_DOMAIN_MEMBER) && !winbind_ping()) ||
1002 (server_info->was_mapped)) {
1003 status = create_token_from_username(server_info,
1004 server_info->unix_name,
1005 server_info->guest,
1006 &server_info->uid,
1007 &server_info->gid,
1008 &server_info->unix_name,
1009 &server_info->ptok);
1010
1011 } else {
1012 server_info->ptok = create_local_nt_token(
1013 server_info,
1014 pdb_get_user_sid(server_info->sam_account),
1015 server_info->guest,
1016 server_info->num_sids, server_info->sids);
1017 status = server_info->ptok ?
1018 NT_STATUS_OK : NT_STATUS_NO_SUCH_USER;
1019 }
1020
1021 if (!NT_STATUS_IS_OK(status)) {
1022 TALLOC_FREE(mem_ctx);
1023 return status;
1024 }
1025
1026 /* Convert the SIDs to gids. */
1027
1028 server_info->n_groups = 0;
1029 server_info->groups = NULL;
1030
1031 /* Start at index 1, where the groups start. */
1032
1033 for (i=1; i<server_info->ptok->num_sids; i++) {
1034 gid_t gid;
1035 DOM_SID *sid = &server_info->ptok->user_sids[i];
1036
1037 if (!sid_to_gid(sid, &gid)) {
1038 DEBUG(10, ("Could not convert SID %s to gid, "
1039 "ignoring it\n", sid_string_static(sid)));
1040 continue;
1041 }
1042 add_gid_to_array_unique(server_info, gid, &server_info->groups,
1043 &server_info->n_groups);
1044 }
1045
1046 debug_nt_user_token(DBGC_AUTH, 10, server_info->ptok);
1047
1048 status = log_nt_token(mem_ctx, server_info->ptok);
1049
1050 TALLOC_FREE(mem_ctx);
1051 return status;
1052}
1053
1054/*
1055 * Create an artificial NT token given just a username. (Initially indended
1056 * for force user)
1057 *
1058 * We go through lookup_name() to avoid problems we had with 'winbind use
1059 * default domain'.
1060 *
1061 * We have 3 cases:
1062 *
1063 * unmapped unix users: Go directly to nss to find the user's group.
1064 *
1065 * A passdb user: The list of groups is provided by pdb_enum_group_memberships.
1066 *
1067 * If the user is provided by winbind, the primary gid is set to "domain
1068 * users" of the user's domain. For an explanation why this is necessary, see
1069 * the thread starting at
1070 * http://lists.samba.org/archive/samba-technical/2006-January/044803.html.
1071 */
1072
1073NTSTATUS create_token_from_username(TALLOC_CTX *mem_ctx, const char *username,
1074 BOOL is_guest,
1075 uid_t *uid, gid_t *gid,
1076 char **found_username,
1077 struct nt_user_token **token)
1078{
1079 NTSTATUS result = NT_STATUS_NO_SUCH_USER;
1080 TALLOC_CTX *tmp_ctx;
1081 DOM_SID user_sid;
1082 enum lsa_SidType type;
1083 gid_t *gids;
1084 DOM_SID *group_sids;
1085 DOM_SID unix_group_sid;
1086 size_t num_group_sids;
1087 size_t num_gids;
1088 size_t i;
1089
1090 tmp_ctx = talloc_new(NULL);
1091 if (tmp_ctx == NULL) {
1092 DEBUG(0, ("talloc_new failed\n"));
1093 return NT_STATUS_NO_MEMORY;
1094 }
1095
1096 if (!lookup_name_smbconf(tmp_ctx, username, LOOKUP_NAME_ALL,
1097 NULL, NULL, &user_sid, &type)) {
1098 DEBUG(1, ("lookup_name_smbconf for %s failed\n", username));
1099 goto done;
1100 }
1101
1102 if (type != SID_NAME_USER) {
1103 DEBUG(1, ("%s is a %s, not a user\n", username,
1104 sid_type_lookup(type)));
1105 goto done;
1106 }
1107
1108 if (!sid_to_uid(&user_sid, uid)) {
1109 DEBUG(1, ("sid_to_uid for %s (%s) failed\n",
1110 username, sid_string_static(&user_sid)));
1111 goto done;
1112 }
1113
1114 if (sid_check_is_in_our_domain(&user_sid)) {
1115
1116 /* This is a passdb user, so ask passdb */
1117
1118 struct samu *sam_acct = NULL;
1119
1120 if ( !(sam_acct = samu_new( tmp_ctx )) ) {
1121 result = NT_STATUS_NO_MEMORY;
1122 goto done;
1123 }
1124
1125 if (!pdb_getsampwsid(sam_acct, &user_sid)) {
1126 DEBUG(1, ("pdb_getsampwsid(%s) for user %s failed\n",
1127 sid_string_static(&user_sid), username));
1128 DEBUGADD(1, ("Fall back to unix user %s\n", username));
1129 goto unix_user;
1130 }
1131
1132 result = pdb_enum_group_memberships(tmp_ctx, sam_acct,
1133 &group_sids, &gids,
1134 &num_group_sids);
1135 if (!NT_STATUS_IS_OK(result)) {
1136 DEBUG(10, ("enum_group_memberships failed for %s\n",
1137 username));
1138 DEBUGADD(1, ("Fall back to unix user %s\n", username));
1139 goto unix_user;
1140 }
1141
1142 /* see the smb_panic() in pdb_default_enum_group_memberships */
1143 SMB_ASSERT(num_group_sids > 0);
1144
1145 *gid = gids[0];
1146
1147 /* Ensure we're returning the found_username on the right context. */
1148 *found_username = talloc_strdup(mem_ctx,
1149 pdb_get_username(sam_acct));
1150
1151 } else if (sid_check_is_in_unix_users(&user_sid)) {
1152
1153 /* This is a unix user not in passdb. We need to ask nss
1154 * directly, without consulting passdb */
1155
1156 struct passwd *pass;
1157
1158 /*
1159 * This goto target is used as a fallback for the passdb
1160 * case. The concrete bug report is when passdb gave us an
1161 * unmapped gid.
1162 */
1163
1164 unix_user:
1165
1166 uid_to_unix_users_sid(*uid, &user_sid);
1167
1168 pass = getpwuid_alloc(tmp_ctx, *uid);
1169 if (pass == NULL) {
1170 DEBUG(1, ("getpwuid(%d) for user %s failed\n",
1171 *uid, username));
1172 goto done;
1173 }
1174
1175 if (!getgroups_unix_user(tmp_ctx, username, pass->pw_gid,
1176 &gids, &num_group_sids)) {
1177 DEBUG(1, ("getgroups_unix_user for user %s failed\n",
1178 username));
1179 goto done;
1180 }
1181
1182 if (num_group_sids) {
1183 group_sids = TALLOC_ARRAY(tmp_ctx, DOM_SID, num_group_sids);
1184 if (group_sids == NULL) {
1185 DEBUG(1, ("TALLOC_ARRAY failed\n"));
1186 result = NT_STATUS_NO_MEMORY;
1187 goto done;
1188 }
1189 } else {
1190 group_sids = NULL;
1191 }
1192
1193 for (i=0; i<num_group_sids; i++) {
1194 gid_to_sid(&group_sids[i], gids[i]);
1195 }
1196
1197 /* In getgroups_unix_user we always set the primary gid */
1198 SMB_ASSERT(num_group_sids > 0);
1199
1200 *gid = gids[0];
1201
1202 /* Ensure we're returning the found_username on the right context. */
1203 *found_username = talloc_strdup(mem_ctx, pass->pw_name);
1204 } else {
1205
1206 /* This user is from winbind, force the primary gid to the
1207 * user's "domain users" group. Under certain circumstances
1208 * (user comes from NT4), this might be a loss of
1209 * information. But we can not rely on winbind getting the
1210 * correct info. AD might prohibit winbind looking up that
1211 * information. */
1212
1213 uint32 dummy;
1214
1215 num_group_sids = 1;
1216 group_sids = TALLOC_ARRAY(tmp_ctx, DOM_SID, num_group_sids);
1217 if (group_sids == NULL) {
1218 DEBUG(1, ("TALLOC_ARRAY failed\n"));
1219 result = NT_STATUS_NO_MEMORY;
1220 goto done;
1221 }
1222
1223 sid_copy(&group_sids[0], &user_sid);
1224 sid_split_rid(&group_sids[0], &dummy);
1225 sid_append_rid(&group_sids[0], DOMAIN_GROUP_RID_USERS);
1226
1227 if (!sid_to_gid(&group_sids[0], gid)) {
1228 DEBUG(1, ("sid_to_gid(%s) failed\n",
1229 sid_string_static(&group_sids[0])));
1230 goto done;
1231 }
1232
1233 gids = gid;
1234
1235 /* Ensure we're returning the found_username on the right context. */
1236 *found_username = talloc_strdup(mem_ctx, username);
1237 }
1238
1239 /* Add the "Unix Group" SID for each gid to catch mapped groups
1240 and their Unix equivalent. This is to solve the backwards
1241 compatibility problem of 'valid users = +ntadmin' where
1242 ntadmin has been paired with "Domain Admins" in the group
1243 mapping table. Otherwise smb.conf would need to be changed
1244 to 'valid user = "Domain Admins"'. --jerry */
1245
1246 num_gids = num_group_sids;
1247 for ( i=0; i<num_gids; i++ ) {
1248 gid_t high, low;
1249
1250 /* don't pickup anything managed by Winbind */
1251
1252 if ( lp_idmap_gid(&low, &high) && (gids[i] >= low) && (gids[i] <= high) )
1253 continue;
1254
1255 if ( !gid_to_unix_groups_sid( gids[i], &unix_group_sid ) ) {
1256 DEBUG(1,("create_token_from_username: Failed to create SID "
1257 "for gid %d!\n", gids[i]));
1258 continue;
1259 }
1260 if (!add_sid_to_array_unique(tmp_ctx, &unix_group_sid,
1261 &group_sids, &num_group_sids )) {
1262 result = NT_STATUS_NO_MEMORY;
1263 goto done;
1264 }
1265 }
1266
1267 /* Ensure we're creating the nt_token on the right context. */
1268 *token = create_local_nt_token(mem_ctx, &user_sid,
1269 is_guest, num_group_sids, group_sids);
1270
1271 if ((*token == NULL) || (*found_username == NULL)) {
1272 result = NT_STATUS_NO_MEMORY;
1273 goto done;
1274 }
1275
1276 result = NT_STATUS_OK;
1277 done:
1278 TALLOC_FREE(tmp_ctx);
1279 return result;
1280}
1281
1282/***************************************************************************
1283 Build upon create_token_from_username:
1284
1285 Expensive helper function to figure out whether a user given its name is
1286 member of a particular group.
1287***************************************************************************/
1288
1289BOOL user_in_group_sid(const char *username, const DOM_SID *group_sid)
1290{
1291 NTSTATUS status;
1292 uid_t uid;
1293 gid_t gid;
1294 char *found_username;
1295 struct nt_user_token *token;
1296 BOOL result;
1297
1298 TALLOC_CTX *mem_ctx;
1299
1300 mem_ctx = talloc_new(NULL);
1301 if (mem_ctx == NULL) {
1302 DEBUG(0, ("talloc_new failed\n"));
1303 return False;
1304 }
1305
1306 status = create_token_from_username(mem_ctx, username, False,
1307 &uid, &gid, &found_username,
1308 &token);
1309
1310 if (!NT_STATUS_IS_OK(status)) {
1311 DEBUG(10, ("could not create token for %s\n", username));
1312 return False;
1313 }
1314
1315 result = nt_token_check_sid(group_sid, token);
1316
1317 TALLOC_FREE(mem_ctx);
1318 return result;
1319
1320}
1321
1322BOOL user_in_group(const char *username, const char *groupname)
1323{
1324 TALLOC_CTX *mem_ctx;
1325 DOM_SID group_sid;
1326 BOOL ret;
1327
1328 mem_ctx = talloc_new(NULL);
1329 if (mem_ctx == NULL) {
1330 DEBUG(0, ("talloc_new failed\n"));
1331 return False;
1332 }
1333
1334 ret = lookup_name(mem_ctx, groupname, LOOKUP_NAME_ALL,
1335 NULL, NULL, &group_sid, NULL);
1336 TALLOC_FREE(mem_ctx);
1337
1338 if (!ret) {
1339 DEBUG(10, ("lookup_name for (%s) failed.\n", groupname));
1340 return False;
1341 }
1342
1343 return user_in_group_sid(username, &group_sid);
1344}
1345
1346
1347/***************************************************************************
1348 Make (and fill) a user_info struct from a 'struct passwd' by conversion
1349 to a struct samu
1350***************************************************************************/
1351
1352NTSTATUS make_server_info_pw(auth_serversupplied_info **server_info,
1353 char *unix_username,
1354 struct passwd *pwd)
1355{
1356 NTSTATUS status;
1357 struct samu *sampass = NULL;
1358 gid_t *gids;
1359 char *qualified_name = NULL;
1360 TALLOC_CTX *mem_ctx = NULL;
1361 DOM_SID u_sid;
1362 enum lsa_SidType type;
1363 auth_serversupplied_info *result;
1364
1365 if ( !(sampass = samu_new( NULL )) ) {
1366 return NT_STATUS_NO_MEMORY;
1367 }
1368
1369 status = samu_set_unix( sampass, pwd );
1370 if (!NT_STATUS_IS_OK(status)) {
1371 return status;
1372 }
1373
1374 result = make_server_info(NULL);
1375 if (result == NULL) {
1376 TALLOC_FREE(sampass);
1377 return NT_STATUS_NO_MEMORY;
1378 }
1379
1380 result->sam_account = sampass;
1381 result->unix_name = talloc_strdup(result, unix_username);
1382 result->uid = pwd->pw_uid;
1383 result->gid = pwd->pw_gid;
1384
1385 status = pdb_enum_group_memberships(result, sampass,
1386 &result->sids, &gids,
1387 &result->num_sids);
1388
1389 if (!NT_STATUS_IS_OK(status)) {
1390 DEBUG(10, ("pdb_enum_group_memberships failed: %s\n",
1391 nt_errstr(status)));
1392 TALLOC_FREE(result);
1393 return status;
1394 }
1395
1396 /*
1397 * The SID returned in server_info->sam_account is based
1398 * on our SAM sid even though for a pure UNIX account this should
1399 * not be the case as it doesn't really exist in the SAM db.
1400 * This causes lookups on "[in]valid users" to fail as they
1401 * will lookup this name as a "Unix User" SID to check against
1402 * the user token. Fix this by adding the "Unix User"\unix_username
1403 * SID to the sid array. The correct fix should probably be
1404 * changing the server_info->sam_account user SID to be a
1405 * S-1-22 Unix SID, but this might break old configs where
1406 * plaintext passwords were used with no SAM backend.
1407 */
1408
1409 mem_ctx = talloc_init("make_server_info_pw_tmp");
1410 if (!mem_ctx) {
1411 TALLOC_FREE(result);
1412 return NT_STATUS_NO_MEMORY;
1413 }
1414
1415 qualified_name = talloc_asprintf(mem_ctx, "%s\\%s",
1416 unix_users_domain_name(),
1417 unix_username );
1418 if (!qualified_name) {
1419 TALLOC_FREE(result);
1420 TALLOC_FREE(mem_ctx);
1421 return NT_STATUS_NO_MEMORY;
1422 }
1423
1424 if (!lookup_name(mem_ctx, qualified_name, LOOKUP_NAME_ALL,
1425 NULL, NULL,
1426 &u_sid, &type)) {
1427 TALLOC_FREE(result);
1428 TALLOC_FREE(mem_ctx);
1429 return NT_STATUS_NO_SUCH_USER;
1430 }
1431
1432 TALLOC_FREE(mem_ctx);
1433
1434 if (type != SID_NAME_USER) {
1435 TALLOC_FREE(result);
1436 return NT_STATUS_NO_SUCH_USER;
1437 }
1438
1439 if (!add_sid_to_array_unique(result, &u_sid,
1440 &result->sids,
1441 &result->num_sids)) {
1442 TALLOC_FREE(result);
1443 return NT_STATUS_NO_MEMORY;
1444 }
1445
1446 /* For now we throw away the gids and convert via sid_to_gid
1447 * later. This needs fixing, but I'd like to get the code straight and
1448 * simple first. */
1449 TALLOC_FREE(gids);
1450
1451 *server_info = result;
1452
1453 return NT_STATUS_OK;
1454}
1455
1456/***************************************************************************
1457 Make (and fill) a user_info struct for a guest login.
1458 This *must* succeed for smbd to start. If there is no mapping entry for
1459 the guest gid, then create one.
1460***************************************************************************/
1461
1462static NTSTATUS make_new_server_info_guest(auth_serversupplied_info **server_info)
1463{
1464 NTSTATUS status;
1465 struct samu *sampass = NULL;
1466 DOM_SID guest_sid;
1467 BOOL ret;
1468 static const char zeros[16] = { 0, };
1469
1470 if ( !(sampass = samu_new( NULL )) ) {
1471 return NT_STATUS_NO_MEMORY;
1472 }
1473
1474 sid_copy(&guest_sid, get_global_sam_sid());
1475 sid_append_rid(&guest_sid, DOMAIN_USER_RID_GUEST);
1476
1477 become_root();
1478 ret = pdb_getsampwsid(sampass, &guest_sid);
1479 unbecome_root();
1480
1481 if (!ret) {
1482 TALLOC_FREE(sampass);
1483 return NT_STATUS_NO_SUCH_USER;
1484 }
1485
1486 status = make_server_info_sam(server_info, sampass);
1487 if (!NT_STATUS_IS_OK(status)) {
1488 TALLOC_FREE(sampass);
1489 return status;
1490 }
1491
1492 (*server_info)->guest = True;
1493
1494 status = create_local_token(*server_info);
1495 if (!NT_STATUS_IS_OK(status)) {
1496 DEBUG(10, ("create_local_token failed: %s\n",
1497 nt_errstr(status)));
1498 return status;
1499 }
1500
1501 /* annoying, but the Guest really does have a session key, and it is
1502 all zeros! */
1503 (*server_info)->user_session_key = data_blob(zeros, sizeof(zeros));
1504 (*server_info)->lm_session_key = data_blob(zeros, sizeof(zeros));
1505
1506 return NT_STATUS_OK;
1507}
1508
1509static auth_serversupplied_info *copy_serverinfo(auth_serversupplied_info *src)
1510{
1511 auth_serversupplied_info *dst;
1512
1513 dst = make_server_info(NULL);
1514 if (dst == NULL) {
1515 return NULL;
1516 }
1517
1518 dst->guest = src->guest;
1519 dst->uid = src->uid;
1520 dst->gid = src->gid;
1521 dst->n_groups = src->n_groups;
1522 if (src->n_groups != 0) {
1523 dst->groups = (gid_t *)TALLOC_MEMDUP(
1524 dst, src->groups, sizeof(gid_t)*dst->n_groups);
1525 } else {
1526 dst->groups = NULL;
1527 }
1528
1529 if (src->ptok) {
1530 dst->ptok = dup_nt_token(dst, src->ptok);
1531 if (!dst->ptok) {
1532 TALLOC_FREE(dst);
1533 return NULL;
1534 }
1535 }
1536
1537 dst->user_session_key = data_blob_talloc( dst, src->user_session_key.data,
1538 src->user_session_key.length);
1539
1540 dst->lm_session_key = data_blob_talloc(dst, src->lm_session_key.data,
1541 src->lm_session_key.length);
1542
1543 dst->sam_account = samu_new(NULL);
1544 if (!dst->sam_account) {
1545 TALLOC_FREE(dst);
1546 return NULL;
1547 }
1548
1549 if (!pdb_copy_sam_account(dst->sam_account, src->sam_account)) {
1550 TALLOC_FREE(dst);
1551 return NULL;
1552 }
1553
1554 dst->pam_handle = NULL;
1555 dst->unix_name = talloc_strdup(dst, src->unix_name);
1556 if (!dst->unix_name) {
1557 TALLOC_FREE(dst);
1558 return NULL;
1559 }
1560
1561 return dst;
1562}
1563
1564static auth_serversupplied_info *guest_info = NULL;
1565
1566BOOL init_guest_info(void)
1567{
1568 if (guest_info != NULL)
1569 return True;
1570
1571 return NT_STATUS_IS_OK(make_new_server_info_guest(&guest_info));
1572}
1573
1574NTSTATUS make_server_info_guest(auth_serversupplied_info **server_info)
1575{
1576 *server_info = copy_serverinfo(guest_info);
1577 return (*server_info != NULL) ? NT_STATUS_OK : NT_STATUS_NO_MEMORY;
1578}
1579
1580BOOL copy_current_user(struct current_user *dst, struct current_user *src)
1581{
1582 gid_t *groups;
1583 NT_USER_TOKEN *nt_token;
1584
1585 groups = (gid_t *)memdup(src->ut.groups,
1586 sizeof(gid_t) * src->ut.ngroups);
1587 if ((src->ut.ngroups != 0) && (groups == NULL)) {
1588 return False;
1589 }
1590
1591 nt_token = dup_nt_token(NULL, src->nt_user_token);
1592 if (nt_token == NULL) {
1593 SAFE_FREE(groups);
1594 return False;
1595 }
1596
1597 dst->conn = src->conn;
1598 dst->vuid = src->vuid;
1599 dst->ut.uid = src->ut.uid;
1600 dst->ut.gid = src->ut.gid;
1601 dst->ut.ngroups = src->ut.ngroups;
1602 dst->ut.groups = groups;
1603 dst->nt_user_token = nt_token;
1604 return True;
1605}
1606
1607BOOL set_current_user_guest(struct current_user *dst)
1608{
1609 gid_t *groups;
1610 NT_USER_TOKEN *nt_token;
1611
1612 groups = (gid_t *)memdup(guest_info->groups,
1613 sizeof(gid_t) * guest_info->n_groups);
1614 if (groups == NULL) {
1615 return False;
1616 }
1617
1618 nt_token = dup_nt_token(NULL, guest_info->ptok);
1619 if (nt_token == NULL) {
1620 SAFE_FREE(groups);
1621 return False;
1622 }
1623
1624 TALLOC_FREE(dst->nt_user_token);
1625 SAFE_FREE(dst->ut.groups);
1626
1627 /* dst->conn is never really dereferenced, it's only tested for
1628 * equality in uid.c */
1629 dst->conn = NULL;
1630
1631 dst->vuid = UID_FIELD_INVALID;
1632 dst->ut.uid = guest_info->uid;
1633 dst->ut.gid = guest_info->gid;
1634 dst->ut.ngroups = guest_info->n_groups;
1635 dst->ut.groups = groups;
1636 dst->nt_user_token = nt_token;
1637 return True;
1638}
1639
1640/***************************************************************************
1641 Purely internal function for make_server_info_info3
1642 Fill the sam account from getpwnam
1643***************************************************************************/
1644static NTSTATUS fill_sam_account(TALLOC_CTX *mem_ctx,
1645 const char *domain,
1646 const char *username,
1647 char **found_username,
1648 uid_t *uid, gid_t *gid,
1649 struct samu *account,
1650 BOOL *username_was_mapped)
1651{
1652 NTSTATUS nt_status;
1653 fstring dom_user, lower_username;
1654 fstring real_username;
1655 struct passwd *passwd;
1656
1657 fstrcpy( lower_username, username );
1658 strlower_m( lower_username );
1659
1660 fstr_sprintf(dom_user, "%s%c%s", domain, *lp_winbind_separator(),
1661 lower_username);
1662
1663 /* Get the passwd struct. Try to create the account is necessary. */
1664
1665 *username_was_mapped = map_username( dom_user );
1666
1667 if ( !(passwd = smb_getpwnam( NULL, dom_user, real_username, True )) )
1668 return NT_STATUS_NO_SUCH_USER;
1669
1670 *uid = passwd->pw_uid;
1671 *gid = passwd->pw_gid;
1672
1673 /* This is pointless -- there is no suport for differing
1674 unix and windows names. Make sure to always store the
1675 one we actually looked up and succeeded. Have I mentioned
1676 why I hate the 'winbind use default domain' parameter?
1677 --jerry */
1678
1679 *found_username = talloc_strdup( mem_ctx, real_username );
1680
1681 DEBUG(5,("fill_sam_account: located username was [%s]\n", *found_username));
1682
1683 nt_status = samu_set_unix( account, passwd );
1684
1685 TALLOC_FREE(passwd);
1686
1687 return nt_status;
1688}
1689
1690/****************************************************************************
1691 Wrapper to allow the getpwnam() call to strip the domain name and
1692 try again in case a local UNIX user is already there. Also run through
1693 the username if we fallback to the username only.
1694 ****************************************************************************/
1695
1696struct passwd *smb_getpwnam( TALLOC_CTX *mem_ctx, char *domuser,
1697 fstring save_username, BOOL create )
1698{
1699 struct passwd *pw = NULL;
1700 char *p;
1701 fstring username;
1702
1703 /* we only save a copy of the username it has been mangled
1704 by winbindd use default domain */
1705
1706 save_username[0] = '\0';
1707
1708 /* don't call map_username() here since it has to be done higher
1709 up the stack so we don't call it mutliple times */
1710
1711 fstrcpy( username, domuser );
1712
1713 p = strchr_m( username, *lp_winbind_separator() );
1714
1715 /* code for a DOMAIN\user string */
1716
1717 if ( p ) {
1718 fstring strip_username;
1719
1720 pw = Get_Pwnam_alloc( mem_ctx, domuser );
1721 if ( pw ) {
1722 /* make sure we get the case of the username correct */
1723 /* work around 'winbind use default domain = yes' */
1724
1725 if ( !strchr_m( pw->pw_name, *lp_winbind_separator() ) ) {
1726 char *domain;
1727
1728 /* split the domain and username into 2 strings */
1729 *p = '\0';
1730 domain = username;
1731
1732 fstr_sprintf(save_username, "%s%c%s", domain, *lp_winbind_separator(), pw->pw_name);
1733 }
1734 else
1735 fstrcpy( save_username, pw->pw_name );
1736
1737 /* whew -- done! */
1738 return pw;
1739 }
1740
1741 /* setup for lookup of just the username */
1742 /* remember that p and username are overlapping memory */
1743
1744 p++;
1745 fstrcpy( strip_username, p );
1746 fstrcpy( username, strip_username );
1747 }
1748
1749 /* just lookup a plain username */
1750
1751 pw = Get_Pwnam_alloc(mem_ctx, username);
1752
1753 /* Create local user if requested but only if winbindd
1754 is not running. We need to protect against cases
1755 where winbindd is failing and then prematurely
1756 creating users in /etc/passwd */
1757
1758 if ( !pw && create && !winbind_ping() ) {
1759 /* Don't add a machine account. */
1760 if (username[strlen(username)-1] == '$')
1761 return NULL;
1762
1763 smb_create_user(NULL, username, NULL);
1764 pw = Get_Pwnam_alloc(mem_ctx, username);
1765 }
1766
1767 /* one last check for a valid passwd struct */
1768
1769 if ( pw )
1770 fstrcpy( save_username, pw->pw_name );
1771
1772 return pw;
1773}
1774
1775/***************************************************************************
1776 Make a server_info struct from the info3 returned by a domain logon
1777***************************************************************************/
1778
1779NTSTATUS make_server_info_info3(TALLOC_CTX *mem_ctx,
1780 const char *sent_nt_username,
1781 const char *domain,
1782 auth_serversupplied_info **server_info,
1783 NET_USER_INFO_3 *info3)
1784{
1785 static const char zeros[16] = { 0, };
1786
1787 NTSTATUS nt_status = NT_STATUS_OK;
1788 char *found_username;
1789 const char *nt_domain;
1790 const char *nt_username;
1791 struct samu *sam_account = NULL;
1792 DOM_SID user_sid;
1793 DOM_SID group_sid;
1794 BOOL username_was_mapped;
1795
1796 uid_t uid;
1797 gid_t gid;
1798
1799 size_t i;
1800
1801 auth_serversupplied_info *result;
1802
1803 /*
1804 Here is where we should check the list of
1805 trusted domains, and verify that the SID
1806 matches.
1807 */
1808
1809 sid_copy(&user_sid, &info3->dom_sid.sid);
1810 if (!sid_append_rid(&user_sid, info3->user_rid)) {
1811 return NT_STATUS_INVALID_PARAMETER;
1812 }
1813
1814 sid_copy(&group_sid, &info3->dom_sid.sid);
1815 if (!sid_append_rid(&group_sid, info3->group_rid)) {
1816 return NT_STATUS_INVALID_PARAMETER;
1817 }
1818
1819 if (!(nt_username = unistr2_tdup(mem_ctx, &(info3->uni_user_name)))) {
1820 /* If the server didn't give us one, just use the one we sent
1821 * them */
1822 nt_username = sent_nt_username;
1823 }
1824
1825 if (!(nt_domain = unistr2_tdup(mem_ctx, &(info3->uni_logon_dom)))) {
1826 /* If the server didn't give us one, just use the one we sent
1827 * them */
1828 nt_domain = domain;
1829 }
1830
1831 /* try to fill the SAM account.. If getpwnam() fails, then try the
1832 add user script (2.2.x behavior).
1833
1834 We use the _unmapped_ username here in an attempt to provide
1835 consistent username mapping behavior between kerberos and NTLM[SSP]
1836 authentication in domain mode security. I.E. Username mapping
1837 should be applied to the fully qualified username
1838 (e.g. DOMAIN\user) and not just the login name. Yes this means we
1839 called map_username() unnecessarily in make_user_info_map() but
1840 that is how the current code is designed. Making the change here
1841 is the least disruptive place. -- jerry */
1842
1843 if ( !(sam_account = samu_new( NULL )) ) {
1844 return NT_STATUS_NO_MEMORY;
1845 }
1846
1847 /* this call will try to create the user if necessary */
1848
1849 nt_status = fill_sam_account(mem_ctx, nt_domain, sent_nt_username,
1850 &found_username, &uid, &gid, sam_account,
1851 &username_was_mapped);
1852
1853
1854 /* if we still don't have a valid unix account check for
1855 'map to guest = bad uid' */
1856
1857 if (!NT_STATUS_IS_OK(nt_status)) {
1858 TALLOC_FREE( sam_account );
1859 if ( lp_map_to_guest() == MAP_TO_GUEST_ON_BAD_UID ) {
1860 make_server_info_guest(server_info);
1861 return NT_STATUS_OK;
1862 }
1863 return nt_status;
1864 }
1865
1866 if (!pdb_set_nt_username(sam_account, nt_username, PDB_CHANGED)) {
1867 TALLOC_FREE(sam_account);
1868 return NT_STATUS_NO_MEMORY;
1869 }
1870
1871 if (!pdb_set_username(sam_account, nt_username, PDB_CHANGED)) {
1872 TALLOC_FREE(sam_account);
1873 return NT_STATUS_NO_MEMORY;
1874 }
1875
1876 if (!pdb_set_domain(sam_account, nt_domain, PDB_CHANGED)) {
1877 TALLOC_FREE(sam_account);
1878 return NT_STATUS_NO_MEMORY;
1879 }
1880
1881 if (!pdb_set_user_sid(sam_account, &user_sid, PDB_CHANGED)) {
1882 TALLOC_FREE(sam_account);
1883 return NT_STATUS_UNSUCCESSFUL;
1884 }
1885
1886 if (!pdb_set_group_sid(sam_account, &group_sid, PDB_CHANGED)) {
1887 TALLOC_FREE(sam_account);
1888 return NT_STATUS_UNSUCCESSFUL;
1889 }
1890
1891 if (!pdb_set_fullname(sam_account,
1892 unistr2_static(&(info3->uni_full_name)),
1893 PDB_CHANGED)) {
1894 TALLOC_FREE(sam_account);
1895 return NT_STATUS_NO_MEMORY;
1896 }
1897
1898 if (!pdb_set_logon_script(sam_account,
1899 unistr2_static(&(info3->uni_logon_script)),
1900 PDB_CHANGED)) {
1901 TALLOC_FREE(sam_account);
1902 return NT_STATUS_NO_MEMORY;
1903 }
1904
1905 if (!pdb_set_profile_path(sam_account,
1906 unistr2_static(&(info3->uni_profile_path)),
1907 PDB_CHANGED)) {
1908 TALLOC_FREE(sam_account);
1909 return NT_STATUS_NO_MEMORY;
1910 }
1911
1912 if (!pdb_set_homedir(sam_account,
1913 unistr2_static(&(info3->uni_home_dir)),
1914 PDB_CHANGED)) {
1915 TALLOC_FREE(sam_account);
1916 return NT_STATUS_NO_MEMORY;
1917 }
1918
1919 if (!pdb_set_dir_drive(sam_account,
1920 unistr2_static(&(info3->uni_dir_drive)),
1921 PDB_CHANGED)) {
1922 TALLOC_FREE(sam_account);
1923 return NT_STATUS_NO_MEMORY;
1924 }
1925
1926 if (!pdb_set_acct_ctrl(sam_account, info3->acct_flags, PDB_CHANGED)) {
1927 TALLOC_FREE(sam_account);
1928 return NT_STATUS_NO_MEMORY;
1929 }
1930
1931 if (!pdb_set_pass_last_set_time(
1932 sam_account,
1933 nt_time_to_unix(info3->pass_last_set_time),
1934 PDB_CHANGED)) {
1935 TALLOC_FREE(sam_account);
1936 return NT_STATUS_NO_MEMORY;
1937 }
1938
1939 if (!pdb_set_pass_can_change_time(
1940 sam_account,
1941 nt_time_to_unix(info3->pass_can_change_time),
1942 PDB_CHANGED)) {
1943 TALLOC_FREE(sam_account);
1944 return NT_STATUS_NO_MEMORY;
1945 }
1946
1947 if (!pdb_set_pass_must_change_time(
1948 sam_account,
1949 nt_time_to_unix(info3->pass_must_change_time),
1950 PDB_CHANGED)) {
1951 TALLOC_FREE(sam_account);
1952 return NT_STATUS_NO_MEMORY;
1953 }
1954
1955 result = make_server_info(NULL);
1956 if (result == NULL) {
1957 DEBUG(4, ("make_server_info failed!\n"));
1958 TALLOC_FREE(sam_account);
1959 return NT_STATUS_NO_MEMORY;
1960 }
1961
1962 /* save this here to _net_sam_logon() doesn't fail (it assumes a
1963 valid struct samu) */
1964
1965 result->sam_account = sam_account;
1966 result->unix_name = talloc_strdup(result, found_username);
1967
1968 /* Fill in the unix info we found on the way */
1969
1970 result->uid = uid;
1971 result->gid = gid;
1972
1973 /* Create a 'combined' list of all SIDs we might want in the SD */
1974
1975 result->num_sids = 0;
1976 result->sids = NULL;
1977
1978 /* and create (by appending rids) the 'domain' sids */
1979
1980 for (i = 0; i < info3->num_groups2; i++) {
1981 DOM_SID sid;
1982 if (!sid_compose(&sid, &info3->dom_sid.sid,
1983 info3->gids[i].g_rid)) {
1984 DEBUG(3,("could not append additional group rid "
1985 "0x%x\n", info3->gids[i].g_rid));
1986 TALLOC_FREE(result);
1987 return NT_STATUS_INVALID_PARAMETER;
1988 }
1989 if (!add_sid_to_array(result, &sid, &result->sids,
1990 &result->num_sids)) {
1991 TALLOC_FREE(result);
1992 return NT_STATUS_NO_MEMORY;
1993 }
1994 }
1995
1996 /* Copy 'other' sids. We need to do sid filtering here to
1997 prevent possible elevation of privileges. See:
1998
1999 http://www.microsoft.com/windows2000/techinfo/administration/security/sidfilter.asp
2000 */
2001
2002 for (i = 0; i < info3->num_other_sids; i++) {
2003 if (!add_sid_to_array(result, &info3->other_sids[i].sid,
2004 &result->sids,
2005 &result->num_sids)) {
2006 TALLOC_FREE(result);
2007 return NT_STATUS_NO_MEMORY;
2008 }
2009 }
2010
2011 result->login_server = unistr2_tdup(result,
2012 &(info3->uni_logon_srv));
2013
2014 /* ensure we are never given NULL session keys */
2015
2016 if (memcmp(info3->user_sess_key, zeros, sizeof(zeros)) == 0) {
2017 result->user_session_key = data_blob(NULL, 0);
2018 } else {
2019 result->user_session_key = data_blob_talloc(
2020 result, info3->user_sess_key,
2021 sizeof(info3->user_sess_key));
2022 }
2023
2024 if (memcmp(info3->lm_sess_key, zeros, 8) == 0) {
2025 result->lm_session_key = data_blob(NULL, 0);
2026 } else {
2027 result->lm_session_key = data_blob_talloc(
2028 result, info3->lm_sess_key,
2029 sizeof(info3->lm_sess_key));
2030 }
2031
2032 result->was_mapped = username_was_mapped;
2033
2034 *server_info = result;
2035
2036 return NT_STATUS_OK;
2037}
2038
2039/***************************************************************************
2040 Free a user_info struct
2041***************************************************************************/
2042
2043void free_user_info(auth_usersupplied_info **user_info)
2044{
2045 DEBUG(5,("attempting to free (and zero) a user_info structure\n"));
2046 if (*user_info != NULL) {
2047 if ((*user_info)->smb_name) {
2048 DEBUG(10,("structure was created for %s\n",
2049 (*user_info)->smb_name));
2050 }
2051 SAFE_FREE((*user_info)->smb_name);
2052 SAFE_FREE((*user_info)->internal_username);
2053 SAFE_FREE((*user_info)->client_domain);
2054 SAFE_FREE((*user_info)->domain);
2055 SAFE_FREE((*user_info)->wksta_name);
2056 data_blob_free(&(*user_info)->lm_resp);
2057 data_blob_free(&(*user_info)->nt_resp);
2058 data_blob_clear_free(&(*user_info)->lm_interactive_pwd);
2059 data_blob_clear_free(&(*user_info)->nt_interactive_pwd);
2060 data_blob_clear_free(&(*user_info)->plaintext_password);
2061 ZERO_STRUCT(**user_info);
2062 }
2063 SAFE_FREE(*user_info);
2064}
2065
2066/***************************************************************************
2067 Make an auth_methods struct
2068***************************************************************************/
2069
2070BOOL make_auth_methods(struct auth_context *auth_context, auth_methods **auth_method)
2071{
2072 if (!auth_context) {
2073 smb_panic("no auth_context supplied to "
2074 "make_auth_methods()!\n");
2075 }
2076
2077 if (!auth_method) {
2078 smb_panic("make_auth_methods: pointer to auth_method pointer "
2079 "is NULL!\n");
2080 }
2081
2082 *auth_method = TALLOC_P(auth_context->mem_ctx, auth_methods);
2083 if (!*auth_method) {
2084 DEBUG(0,("make_auth_method: malloc failed!\n"));
2085 return False;
2086 }
2087 ZERO_STRUCTP(*auth_method);
2088
2089 return True;
2090}
2091
2092/****************************************************************************
2093 Duplicate a SID token.
2094****************************************************************************/
2095
2096NT_USER_TOKEN *dup_nt_token(TALLOC_CTX *mem_ctx, const NT_USER_TOKEN *ptoken)
2097{
2098 NT_USER_TOKEN *token;
2099
2100 if (!ptoken)
2101 return NULL;
2102
2103 token = TALLOC_P(mem_ctx, NT_USER_TOKEN);
2104 if (token == NULL) {
2105 DEBUG(0, ("talloc failed\n"));
2106 return NULL;
2107 }
2108
2109 ZERO_STRUCTP(token);
2110
2111 if (ptoken->user_sids && ptoken->num_sids) {
2112 token->user_sids = (DOM_SID *)TALLOC_MEMDUP(
2113 token, ptoken->user_sids, sizeof(DOM_SID) * ptoken->num_sids );
2114
2115 if (token->user_sids == NULL) {
2116 DEBUG(0, ("TALLOC_MEMDUP failed\n"));
2117 TALLOC_FREE(token);
2118 return NULL;
2119 }
2120 token->num_sids = ptoken->num_sids;
2121 }
2122
2123 /* copy the privileges; don't consider failure to be critical here */
2124
2125 if ( !se_priv_copy( &token->privileges, &ptoken->privileges ) ) {
2126 DEBUG(0,("dup_nt_token: Failure to copy SE_PRIV!. "
2127 "Continuing with 0 privileges assigned.\n"));
2128 }
2129
2130 return token;
2131}
2132
2133/****************************************************************************
2134 Check for a SID in an NT_USER_TOKEN
2135****************************************************************************/
2136
2137BOOL nt_token_check_sid ( const DOM_SID *sid, const NT_USER_TOKEN *token )
2138{
2139 int i;
2140
2141 if ( !sid || !token )
2142 return False;
2143
2144 for ( i=0; i<token->num_sids; i++ ) {
2145 if ( sid_equal( sid, &token->user_sids[i] ) )
2146 return True;
2147 }
2148
2149 return False;
2150}
2151
2152BOOL nt_token_check_domain_rid( NT_USER_TOKEN *token, uint32 rid )
2153{
2154 DOM_SID domain_sid;
2155
2156 /* if we are a domain member, the get the domain SID, else for
2157 a DC or standalone server, use our own SID */
2158
2159 if ( lp_server_role() == ROLE_DOMAIN_MEMBER ) {
2160 if ( !secrets_fetch_domain_sid( lp_workgroup(),
2161 &domain_sid ) ) {
2162 DEBUG(1,("nt_token_check_domain_rid: Cannot lookup "
2163 "SID for domain [%s]\n", lp_workgroup()));
2164 return False;
2165 }
2166 }
2167 else
2168 sid_copy( &domain_sid, get_global_sam_sid() );
2169
2170 sid_append_rid( &domain_sid, rid );
2171
2172 return nt_token_check_sid( &domain_sid, token );\
2173}
2174
2175/**
2176 * Verify whether or not given domain is trusted.
2177 *
2178 * @param domain_name name of the domain to be verified
2179 * @return true if domain is one of the trusted once or
2180 * false if otherwise
2181 **/
2182
2183BOOL is_trusted_domain(const char* dom_name)
2184{
2185 DOM_SID trustdom_sid;
2186 BOOL ret;
2187
2188 /* no trusted domains for a standalone server */
2189
2190 if ( lp_server_role() == ROLE_STANDALONE )
2191 return False;
2192
2193 /* if we are a DC, then check for a direct trust relationships */
2194
2195 if ( IS_DC ) {
2196 become_root();
2197 DEBUG (5,("is_trusted_domain: Checking for domain trust with "
2198 "[%s]\n", dom_name ));
2199 ret = secrets_fetch_trusted_domain_password(dom_name, NULL,
2200 NULL, NULL);
2201 unbecome_root();
2202 if (ret)
2203 return True;
2204 }
2205 else {
2206 NSS_STATUS result;
2207
2208 /* If winbind is around, ask it */
2209
2210 result = wb_is_trusted_domain(dom_name);
2211
2212 if (result == NSS_STATUS_SUCCESS) {
2213 return True;
2214 }
2215
2216 if (result == NSS_STATUS_NOTFOUND) {
2217 /* winbind could not find the domain */
2218 return False;
2219 }
2220
2221 /* The only other possible result is that winbind is not up
2222 and running. We need to update the trustdom_cache
2223 ourselves */
2224
2225 update_trustdom_cache();
2226 }
2227
2228 /* now the trustdom cache should be available a DC could still
2229 * have a transitive trust so fall back to the cache of trusted
2230 * domains (like a domain member would use */
2231
2232 if ( trustdom_cache_fetch(dom_name, &trustdom_sid) ) {
2233 return True;
2234 }
2235
2236 return False;
2237}
2238
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