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r19758: remove the LDAP_SCOPE_ONELEVEL define (not needed after svnup)
[Samba.git] / source / auth / auth_util.c
blob704f0989e3ab244144c4df7f4196479be0a6fe7b
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 BOOL is_guest,
33 int num_groupsids,
34 const DOM_SID *groupsids);
35
36 /****************************************************************************
37 Create a UNIX user on demand.
38 ****************************************************************************/
39
40 static 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
63 static 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
144 NTSTATUS 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
196 BOOL 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
234 BOOL 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
347 BOOL 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
405 NTSTATUS 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
423 BOOL 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
443 void 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
469 void 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
491 NT_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
516 static int server_info_dtor(void *p)
517 {
518 auth_serversupplied_info *server_info =
519 talloc_get_type_abort(p, auth_serversupplied_info);
520
521 if (server_info->sam_account != NULL) {
522 TALLOC_FREE(server_info->sam_account);
523 }
524
525 ZERO_STRUCTP(server_info);
526 return 0;
527 }
528
529 /***************************************************************************
530 Make a server_info struct. Free with TALLOC_FREE().
531 ***************************************************************************/
532
533 static auth_serversupplied_info *make_server_info(TALLOC_CTX *mem_ctx)
534 {
535 struct auth_serversupplied_info *result;
536
537 result = TALLOC_ZERO_P(mem_ctx, auth_serversupplied_info);
538 if (result == NULL) {
539 DEBUG(0, ("talloc failed\n"));
540 return NULL;
541 }
542
543 talloc_set_destructor(result, server_info_dtor);
544
545 /* Initialise the uid and gid values to something non-zero
546 which may save us from giving away root access if there
547 is a bug in allocating these fields. */
548
549 result->uid = -1;
550 result->gid = -1;
551 return result;
552 }
553
554 /***************************************************************************
555 Make (and fill) a user_info struct from a struct samu
556 ***************************************************************************/
557
558 NTSTATUS make_server_info_sam(auth_serversupplied_info **server_info,
559 struct samu *sampass)
560 {
561 NTSTATUS status;
562 struct passwd *pwd;
563 gid_t *gids;
564 auth_serversupplied_info *result;
565 int i;
566 size_t num_gids;
567 DOM_SID unix_group_sid;
568
569
570 if ( !(pwd = getpwnam_alloc(NULL, pdb_get_username(sampass))) ) {
571 DEBUG(1, ("User %s in passdb, but getpwnam() fails!\n",
572 pdb_get_username(sampass)));
573 return NT_STATUS_NO_SUCH_USER;
574 }
575
576 if ( !(result = make_server_info(NULL)) ) {
577 TALLOC_FREE(pwd);
578 return NT_STATUS_NO_MEMORY;
579 }
580
581 result->sam_account = sampass;
582 result->unix_name = talloc_strdup(result, pwd->pw_name);
583 result->gid = pwd->pw_gid;
584 result->uid = pwd->pw_uid;
585
586 TALLOC_FREE(pwd);
587
588 status = pdb_enum_group_memberships(result, sampass,
589 &result->sids, &gids,
590 &result->num_sids);
591
592 if (!NT_STATUS_IS_OK(status)) {
593 DEBUG(10, ("pdb_enum_group_memberships failed: %s\n",
594 nt_errstr(status)));
595 result->sam_account = NULL; /* Don't free on error exit. */
596 TALLOC_FREE(result);
597 return status;
598 }
599
600 /* Add the "Unix Group" SID for each gid to catch mapped groups
601 and their Unix equivalent. This is to solve the backwards
602 compatibility problem of 'valid users = +ntadmin' where
603 ntadmin has been paired with "Domain Admins" in the group
604 mapping table. Otherwise smb.conf would need to be changed
605 to 'valid user = "Domain Admins"'. --jerry */
606
607 num_gids = result->num_sids;
608 for ( i=0; i<num_gids; i++ ) {
609 if ( !gid_to_unix_groups_sid( gids[i], &unix_group_sid ) ) {
610 DEBUG(1,("make_server_info_sam: Failed to create SID "
611 "for gid %d!\n", gids[i]));
612 continue;
613 }
614 add_sid_to_array_unique( result, &unix_group_sid,
615 &result->sids, &result->num_sids );
616 }
617
618 /* For now we throw away the gids and convert via sid_to_gid
619 * later. This needs fixing, but I'd like to get the code straight and
620 * simple first. */
621
622 TALLOC_FREE(gids);
623
624 DEBUG(5,("make_server_info_sam: made server info for user %s -> %s\n",
625 pdb_get_username(sampass), result->unix_name));
626
627 *server_info = result;
628
629 return NT_STATUS_OK;
630 }
631
632 /*
633 * Add alias SIDs from memberships within the partially created token SID list
634 */
635
636 static NTSTATUS add_aliases(TALLOC_CTX *tmp_ctx, const DOM_SID *domain_sid,
637 struct nt_user_token *token)
638 {
639 uint32 *aliases;
640 size_t i, num_aliases;
641 NTSTATUS status;
642
643 aliases = NULL;
644 num_aliases = 0;
645
646 status = pdb_enum_alias_memberships(tmp_ctx, domain_sid,
647 token->user_sids,
648 token->num_sids,
649 &aliases, &num_aliases);
650
651 if (!NT_STATUS_IS_OK(status)) {
652 DEBUG(10, ("pdb_enum_alias_memberships failed: %s\n",
653 nt_errstr(status)));
654 return status;
655 }
656
657 for (i=0; i<num_aliases; i++) {
658 DOM_SID alias_sid;
659 sid_compose(&alias_sid, domain_sid, aliases[i]);
660 add_sid_to_array_unique(token, &alias_sid,
661 &token->user_sids,
662 &token->num_sids);
663 if (token->user_sids == NULL) {
664 DEBUG(0, ("add_sid_to_array failed\n"));
665 return NT_STATUS_NO_MEMORY;
666 }
667 }
668
669 return NT_STATUS_OK;
670 }
671
672 static NTSTATUS log_nt_token(TALLOC_CTX *tmp_ctx, NT_USER_TOKEN *token)
673 {
674 char *command;
675 char *group_sidstr;
676 size_t i;
677
678 if ((lp_log_nt_token_command() == NULL) ||
679 (strlen(lp_log_nt_token_command()) == 0)) {
680 return NT_STATUS_OK;
681 }
682
683 group_sidstr = talloc_strdup(tmp_ctx, "");
684 for (i=1; i<token->num_sids; i++) {
685 group_sidstr = talloc_asprintf(
686 tmp_ctx, "%s %s", group_sidstr,
687 sid_string_static(&token->user_sids[i]));
688 }
689
690 command = talloc_string_sub(
691 tmp_ctx, lp_log_nt_token_command(),
692 "%s", sid_string_static(&token->user_sids[0]));
693 command = talloc_string_sub(tmp_ctx, command, "%t", group_sidstr);
694
695 if (command == NULL) {
696 return NT_STATUS_NO_MEMORY;
697 }
698
699 DEBUG(8, ("running command: [%s]\n", command));
700 if (smbrun(command, NULL) != 0) {
701 DEBUG(0, ("Could not log NT token\n"));
702 return NT_STATUS_ACCESS_DENIED;
703 }
704
705 return NT_STATUS_OK;
706 }
707
708 /*******************************************************************
709 *******************************************************************/
710
711 static NTSTATUS add_builtin_administrators( TALLOC_CTX *ctx, struct nt_user_token *token )
712 {
713 DOM_SID domadm;
714
715 /* nothing to do if we aren't in a domain */
716
717 if ( !(IS_DC || lp_server_role()==ROLE_DOMAIN_MEMBER) ) {
718 return NT_STATUS_OK;
719 }
720
721 /* Find the Domain Admins SID */
722
723 if ( IS_DC ) {
724 sid_copy( &domadm, get_global_sam_sid() );
725 } else {
726 if ( !secrets_fetch_domain_sid( lp_workgroup(), &domadm ) )
727 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
728 }
729 sid_append_rid( &domadm, DOMAIN_GROUP_RID_ADMINS );
730
731 /* Add Administrators if the user beloongs to Domain Admins */
732
733 if ( nt_token_check_sid( &domadm, token ) ) {
734 add_sid_to_array(token, &global_sid_Builtin_Administrators,
735 &token->user_sids, &token->num_sids);
736 }
737
738 return NT_STATUS_OK;
739 }
740
741 /*******************************************************************
742 *******************************************************************/
743
744 static NTSTATUS create_builtin_users( void )
745 {
746 NTSTATUS status;
747 DOM_SID dom_users;
748
749 status = pdb_create_builtin_alias( BUILTIN_ALIAS_RID_USERS );
750 if ( !NT_STATUS_IS_OK(status) ) {
751 DEBUG(0,("create_builtin_users: Failed to create Users\n"));
752 return status;
753 }
754
755 /* add domain users */
756 if ((IS_DC || (lp_server_role() == ROLE_DOMAIN_MEMBER))
757 && secrets_fetch_domain_sid(lp_workgroup(), &dom_users))
758 {
759 sid_append_rid(&dom_users, DOMAIN_GROUP_RID_USERS );
760 status = pdb_add_aliasmem( &global_sid_Builtin_Users, &dom_users);
761 if ( !NT_STATUS_IS_OK(status) ) {
762 DEBUG(0,("create_builtin_administrators: Failed to add Domain Users to"
763 " Users\n"));
764 return status;
765 }
766 }
767
768 return NT_STATUS_OK;
769 }
770
771 /*******************************************************************
772 *******************************************************************/
773
774 static NTSTATUS create_builtin_administrators( void )
775 {
776 NTSTATUS status;
777 DOM_SID dom_admins, root_sid;
778 fstring root_name;
779 enum SID_NAME_USE type;
780 TALLOC_CTX *ctx;
781 BOOL ret;
782
783 status = pdb_create_builtin_alias( BUILTIN_ALIAS_RID_ADMINS );
784 if ( !NT_STATUS_IS_OK(status) ) {
785 DEBUG(0,("create_builtin_administrators: Failed to create Administrators\n"));
786 return status;
787 }
788
789 /* add domain admins */
790 if ((IS_DC || (lp_server_role() == ROLE_DOMAIN_MEMBER))
791 && secrets_fetch_domain_sid(lp_workgroup(), &dom_admins))
792 {
793 sid_append_rid(&dom_admins, DOMAIN_GROUP_RID_ADMINS);
794 status = pdb_add_aliasmem( &global_sid_Builtin_Administrators, &dom_admins );
795 if ( !NT_STATUS_IS_OK(status) ) {
796 DEBUG(0,("create_builtin_administrators: Failed to add Domain Admins"
797 " Administrators\n"));
798 return status;
799 }
800 }
801
802 /* add root */
803 if ( (ctx = talloc_init("create_builtin_administrators")) == NULL ) {
804 return NT_STATUS_NO_MEMORY;
805 }
806 fstr_sprintf( root_name, "%s\\root", get_global_sam_name() );
807 ret = lookup_name( ctx, root_name, 0, NULL, NULL, &root_sid, &type );
808 TALLOC_FREE( ctx );
809
810 if ( ret ) {
811 status = pdb_add_aliasmem( &global_sid_Builtin_Administrators, &root_sid );
812 if ( !NT_STATUS_IS_OK(status) ) {
813 DEBUG(0,("create_builtin_administrators: Failed to add root"
814 " Administrators\n"));
815 return status;
816 }
817 }
818
819 return NT_STATUS_OK;
820 }
821
822 /*******************************************************************
823 Create a NT token for the user, expanding local aliases
824 *******************************************************************/
825
826 static struct nt_user_token *create_local_nt_token(TALLOC_CTX *mem_ctx,
827 const DOM_SID *user_sid,
828 BOOL is_guest,
829 int num_groupsids,
830 const DOM_SID *groupsids)
831 {
832 TALLOC_CTX *tmp_ctx;
833 struct nt_user_token *result = NULL;
834 int i;
835 NTSTATUS status;
836 gid_t gid;
837
838 tmp_ctx = talloc_new(mem_ctx);
839 if (tmp_ctx == NULL) {
840 DEBUG(0, ("talloc_new failed\n"));
841 return NULL;
842 }
843
844 result = TALLOC_ZERO_P(tmp_ctx, NT_USER_TOKEN);
845 if (result == NULL) {
846 DEBUG(0, ("talloc failed\n"));
847 goto done;
848 }
849
850 /* Add the user and primary group sid */
851
852 add_sid_to_array(result, user_sid,
853 &result->user_sids, &result->num_sids);
854
855 /* For guest, num_groupsids may be zero. */
856 if (num_groupsids) {
857 add_sid_to_array(result, &groupsids[0],
858 &result->user_sids, &result->num_sids);
859 }
860
861 /* Add in BUILTIN sids */
862
863 add_sid_to_array(result, &global_sid_World,
864 &result->user_sids, &result->num_sids);
865 add_sid_to_array(result, &global_sid_Network,
866 &result->user_sids, &result->num_sids);
867
868 if (is_guest) {
869 add_sid_to_array(result, &global_sid_Builtin_Guests,
870 &result->user_sids, &result->num_sids);
871 } else {
872 add_sid_to_array(result, &global_sid_Authenticated_Users,
873 &result->user_sids, &result->num_sids);
874 }
875
876 /* Now the SIDs we got from authentication. These are the ones from
877 * the info3 struct or from the pdb_enum_group_memberships, depending
878 * on who authenticated the user.
879 * Note that we start the for loop at "1" here, we already added the
880 * first group sid as primary above. */
881
882 for (i=1; i<num_groupsids; i++) {
883 add_sid_to_array_unique(result, &groupsids[i],
884 &result->user_sids, &result->num_sids);
885 }
886
887 /* Deal with the BUILTIN\Administrators group. If the SID can
888 be resolved then assume that the add_aliasmem( S-1-5-32 )
889 handled it. */
890
891 if ( !sid_to_gid( &global_sid_Builtin_Administrators, &gid ) ) {
892 /* We can only create a mapping if winbind is running
893 and the nested group functionality has been enabled */
894
895 if ( lp_winbind_nested_groups() && winbind_ping() ) {
896 become_root();
897 status = create_builtin_administrators( );
898 if ( !NT_STATUS_IS_OK(status) ) {
899 DEBUG(2,("create_local_nt_token: Failed to create BUILTIN\\Administrators group!\n"));
900 /* don't fail, just log the message */
901 }
902 unbecome_root();
903 }
904 else {
905 status = add_builtin_administrators( tmp_ctx, result );
906 if ( !NT_STATUS_IS_OK(status) ) {
907 /* just log a complaint but do not fail */
908 DEBUG(3,("create_local_nt_token: failed to check for local Administrators"
909 " membership (%s)\n", nt_errstr(status)));
910 }
911 }
912 }
913
914 /* Deal with the BUILTIN\Users group. If the SID can
915 be resolved then assume that the add_aliasmem( S-1-5-32 )
916 handled it. */
917
918 if ( !sid_to_gid( &global_sid_Builtin_Users, &gid ) ) {
919 /* We can only create a mapping if winbind is running
920 and the nested group functionality has been enabled */
921
922 if ( lp_winbind_nested_groups() && winbind_ping() ) {
923 become_root();
924 status = create_builtin_users( );
925 if ( !NT_STATUS_IS_OK(status) ) {
926 DEBUG(2,("create_local_nt_token: Failed to create BUILTIN\\Users group!\n"));
927 /* don't fail, just log the message */
928 }
929 unbecome_root();
930 }
931 }
932
933 /* Deal with local groups */
934
935 if (lp_winbind_nested_groups()) {
936
937 /* Now add the aliases. First the one from our local SAM */
938
939 status = add_aliases(tmp_ctx, get_global_sam_sid(), result);
940
941 if (!NT_STATUS_IS_OK(status)) {
942 result = NULL;
943 goto done;
944 }
945
946 /* Finally the builtin ones */
947
948 status = add_aliases(tmp_ctx, &global_sid_Builtin, result);
949
950 if (!NT_STATUS_IS_OK(status)) {
951 result = NULL;
952 goto done;
953 }
954 }
955
956
957 get_privileges_for_sids(&result->privileges, result->user_sids,
958 result->num_sids);
959
960 talloc_steal(mem_ctx, result);
961
962 done:
963 TALLOC_FREE(tmp_ctx);
964 return result;
965 }
966
967 /*
968 * Create the token to use from server_info->sam_account and
969 * server_info->sids (the info3/sam groups). Find the unix gids.
970 */
971
972 NTSTATUS create_local_token(auth_serversupplied_info *server_info)
973 {
974 TALLOC_CTX *mem_ctx;
975 NTSTATUS status;
976 size_t i;
977
978
979 mem_ctx = talloc_new(NULL);
980 if (mem_ctx == NULL) {
981 DEBUG(0, ("talloc_new failed\n"));
982 return NT_STATUS_NO_MEMORY;
983 }
984
985 if (((lp_server_role() == ROLE_DOMAIN_MEMBER) && !winbind_ping()) ||
986 (server_info->was_mapped)) {
987 status = create_token_from_username(server_info,
988 server_info->unix_name,
989 server_info->guest,
990 &server_info->uid,
991 &server_info->gid,
992 &server_info->unix_name,
993 &server_info->ptok);
994
995 } else {
996 server_info->ptok = create_local_nt_token(
997 server_info,
998 pdb_get_user_sid(server_info->sam_account),
999 server_info->guest,
1000 server_info->num_sids, server_info->sids);
1001 status = server_info->ptok ?
1002 NT_STATUS_OK : NT_STATUS_NO_SUCH_USER;
1003 }
1004
1005 if (!NT_STATUS_IS_OK(status)) {
1006 TALLOC_FREE(mem_ctx);
1007 return status;
1008 }
1009
1010 /* Convert the SIDs to gids. */
1011
1012 server_info->n_groups = 0;
1013 server_info->groups = NULL;
1014
1015 /* Start at index 1, where the groups start. */
1016
1017 for (i=1; i<server_info->ptok->num_sids; i++) {
1018 gid_t gid;
1019 DOM_SID *sid = &server_info->ptok->user_sids[i];
1020
1021 if (!sid_to_gid(sid, &gid)) {
1022 DEBUG(10, ("Could not convert SID %s to gid, "
1023 "ignoring it\n", sid_string_static(sid)));
1024 continue;
1025 }
1026 add_gid_to_array_unique(server_info, gid, &server_info->groups,
1027 &server_info->n_groups);
1028 }
1029
1030 debug_nt_user_token(DBGC_AUTH, 10, server_info->ptok);
1031
1032 status = log_nt_token(mem_ctx, server_info->ptok);
1033
1034 TALLOC_FREE(mem_ctx);
1035 return status;
1036 }
1037
1038 /*
1039 * Create an artificial NT token given just a username. (Initially indended
1040 * for force user)
1041 *
1042 * We go through lookup_name() to avoid problems we had with 'winbind use
1043 * default domain'.
1044 *
1045 * We have 3 cases:
1046 *
1047 * unmapped unix users: Go directly to nss to find the user's group.
1048 *
1049 * A passdb user: The list of groups is provided by pdb_enum_group_memberships.
1050 *
1051 * If the user is provided by winbind, the primary gid is set to "domain
1052 * users" of the user's domain. For an explanation why this is necessary, see
1053 * the thread starting at
1054 * http://lists.samba.org/archive/samba-technical/2006-January/044803.html.
1055 */
1056
1057 NTSTATUS create_token_from_username(TALLOC_CTX *mem_ctx, const char *username,
1058 BOOL is_guest,
1059 uid_t *uid, gid_t *gid,
1060 char **found_username,
1061 struct nt_user_token **token)
1062 {
1063 NTSTATUS result = NT_STATUS_NO_SUCH_USER;
1064 TALLOC_CTX *tmp_ctx;
1065 DOM_SID user_sid;
1066 enum SID_NAME_USE type;
1067 gid_t *gids;
1068 DOM_SID primary_group_sid;
1069 DOM_SID *group_sids;
1070 DOM_SID unix_group_sid;
1071 size_t num_group_sids;
1072 size_t num_gids;
1073 size_t i;
1074
1075 tmp_ctx = talloc_new(NULL);
1076 if (tmp_ctx == NULL) {
1077 DEBUG(0, ("talloc_new failed\n"));
1078 return NT_STATUS_NO_MEMORY;
1079 }
1080
1081 if (!lookup_name_smbconf(tmp_ctx, username, LOOKUP_NAME_ALL,
1082 NULL, NULL, &user_sid, &type)) {
1083 DEBUG(1, ("lookup_name_smbconf for %s failed\n", username));
1084 goto done;
1085 }
1086
1087 if (type != SID_NAME_USER) {
1088 DEBUG(1, ("%s is a %s, not a user\n", username,
1089 sid_type_lookup(type)));
1090 goto done;
1091 }
1092
1093 if (!sid_to_uid(&user_sid, uid)) {
1094 DEBUG(1, ("sid_to_uid for %s (%s) failed\n",
1095 username, sid_string_static(&user_sid)));
1096 goto done;
1097 }
1098
1099 if (sid_check_is_in_our_domain(&user_sid)) {
1100
1101 /* This is a passdb user, so ask passdb */
1102
1103 struct samu *sam_acct = NULL;
1104
1105 if ( !(sam_acct = samu_new( tmp_ctx )) ) {
1106 result = NT_STATUS_NO_MEMORY;
1107 goto done;
1108 }
1109
1110 if (!pdb_getsampwsid(sam_acct, &user_sid)) {
1111 DEBUG(1, ("pdb_getsampwsid(%s) for user %s failed\n",
1112 sid_string_static(&user_sid), username));
1113 DEBUGADD(1, ("Fall back to unix user %s\n", username));
1114 goto unix_user;
1115 }
1116
1117 result = pdb_enum_group_memberships(tmp_ctx, sam_acct,
1118 &group_sids, &gids,
1119 &num_group_sids);
1120 if (!NT_STATUS_IS_OK(result)) {
1121 DEBUG(10, ("enum_group_memberships failed for %s\n",
1122 username));
1123 DEBUGADD(1, ("Fall back to unix user %s\n", username));
1124 goto unix_user;
1125 }
1126
1127 /* see the smb_panic() in pdb_default_enum_group_memberships */
1128 SMB_ASSERT(num_group_sids > 0);
1129
1130 *gid = gids[0];
1131 *found_username = talloc_strdup(mem_ctx,
1132 pdb_get_username(sam_acct));
1133
1134 } else if (sid_check_is_in_unix_users(&user_sid)) {
1135
1136 /* This is a unix user not in passdb. We need to ask nss
1137 * directly, without consulting passdb */
1138
1139 struct passwd *pass;
1140
1141 /*
1142 * This goto target is used as a fallback for the passdb
1143 * case. The concrete bug report is when passdb gave us an
1144 * unmapped gid.
1145 */
1146
1147 unix_user:
1148
1149 uid_to_unix_users_sid(*uid, &user_sid);
1150
1151 pass = getpwuid_alloc(tmp_ctx, *uid);
1152 if (pass == NULL) {
1153 DEBUG(1, ("getpwuid(%d) for user %s failed\n",
1154 *uid, username));
1155 goto done;
1156 }
1157
1158 if (!getgroups_unix_user(tmp_ctx, username, pass->pw_gid,
1159 &gids, &num_group_sids)) {
1160 DEBUG(1, ("getgroups_unix_user for user %s failed\n",
1161 username));
1162 goto done;
1163 }
1164
1165 group_sids = talloc_array(tmp_ctx, DOM_SID, num_group_sids);
1166 if (group_sids == NULL) {
1167 DEBUG(1, ("talloc_array failed\n"));
1168 result = NT_STATUS_NO_MEMORY;
1169 goto done;
1170 }
1171
1172 for (i=0; i<num_group_sids; i++) {
1173 gid_to_sid(&group_sids[i], gids[i]);
1174 }
1175
1176 /* In getgroups_unix_user we always set the primary gid */
1177 SMB_ASSERT(num_group_sids > 0);
1178
1179 *gid = gids[0];
1180 *found_username = talloc_strdup(mem_ctx, pass->pw_name);
1181
1182 } else {
1183
1184 /* This user is from winbind, force the primary gid to the
1185 * user's "domain users" group. Under certain circumstances
1186 * (user comes from NT4), this might be a loss of
1187 * information. But we can not rely on winbind getting the
1188 * correct info. AD might prohibit winbind looking up that
1189 * information. */
1190
1191 uint32 dummy;
1192
1193 sid_copy(&primary_group_sid, &user_sid);
1194 sid_split_rid(&primary_group_sid, &dummy);
1195 sid_append_rid(&primary_group_sid, DOMAIN_GROUP_RID_USERS);
1196
1197 if (!sid_to_gid(&primary_group_sid, gid)) {
1198 DEBUG(1, ("sid_to_gid(%s) failed\n",
1199 sid_string_static(&primary_group_sid)));
1200 goto done;
1201 }
1202
1203 num_group_sids = 1;
1204 group_sids = &primary_group_sid;
1205 gids = gid;
1206
1207 *found_username = talloc_strdup(mem_ctx, username);
1208 }
1209
1210 /* Add the "Unix Group" SID for each gid to catch mapped groups
1211 and their Unix equivalent. This is to solve the backwards
1212 compatibility problem of 'valid users = +ntadmin' where
1213 ntadmin has been paired with "Domain Admins" in the group
1214 mapping table. Otherwise smb.conf would need to be changed
1215 to 'valid user = "Domain Admins"'. --jerry */
1216
1217 num_gids = num_group_sids;
1218 for ( i=0; i<num_gids; i++ ) {
1219 gid_t high, low;
1220
1221 /* don't pickup anything managed by Winbind */
1222
1223 if ( lp_idmap_gid(&low, &high) && (gids[i] >= low) && (gids[i] <= high) )
1224 continue;
1225
1226 if ( !gid_to_unix_groups_sid( gids[i], &unix_group_sid ) ) {
1227 DEBUG(1,("create_token_from_username: Failed to create SID "
1228 "for gid %d!\n", gids[i]));
1229 continue;
1230 }
1231 add_sid_to_array_unique( mem_ctx, &unix_group_sid,
1232 &group_sids, &num_group_sids );
1233 }
1234
1235 *token = create_local_nt_token(mem_ctx, &user_sid,
1236 is_guest, num_group_sids, group_sids);
1237
1238 if ((*token == NULL) || (*found_username == NULL)) {
1239 result = NT_STATUS_NO_MEMORY;
1240 goto done;
1241 }
1242
1243 result = NT_STATUS_OK;
1244 done:
1245 TALLOC_FREE(tmp_ctx);
1246 return result;
1247 }
1248
1249 /***************************************************************************
1250 Build upon create_token_from_username:
1251
1252 Expensive helper function to figure out whether a user given its name is
1253 member of a particular group.
1254 ***************************************************************************/
1255 BOOL user_in_group_sid(const char *username, const DOM_SID *group_sid)
1256 {
1257 NTSTATUS status;
1258 uid_t uid;
1259 gid_t gid;
1260 char *found_username;
1261 struct nt_user_token *token;
1262 BOOL result;
1263
1264 TALLOC_CTX *mem_ctx;
1265
1266 mem_ctx = talloc_new(NULL);
1267 if (mem_ctx == NULL) {
1268 DEBUG(0, ("talloc_new failed\n"));
1269 return False;
1270 }
1271
1272 status = create_token_from_username(mem_ctx, username, False,
1273 &uid, &gid, &found_username,
1274 &token);
1275
1276 if (!NT_STATUS_IS_OK(status)) {
1277 DEBUG(10, ("could not create token for %s\n", username));
1278 return False;
1279 }
1280
1281 result = nt_token_check_sid(group_sid, token);
1282
1283 TALLOC_FREE(mem_ctx);
1284 return result;
1285
1286 }
1287
1288 BOOL user_in_group(const char *username, const char *groupname)
1289 {
1290 TALLOC_CTX *mem_ctx;
1291 DOM_SID group_sid;
1292 BOOL ret;
1293
1294 mem_ctx = talloc_new(NULL);
1295 if (mem_ctx == NULL) {
1296 DEBUG(0, ("talloc_new failed\n"));
1297 return False;
1298 }
1299
1300 ret = lookup_name(mem_ctx, groupname, LOOKUP_NAME_ALL,
1301 NULL, NULL, &group_sid, NULL);
1302 TALLOC_FREE(mem_ctx);
1303
1304 if (!ret) {
1305 DEBUG(10, ("lookup_name for (%s) failed.\n", groupname));
1306 return False;
1307 }
1308
1309 return user_in_group_sid(username, &group_sid);
1310 }
1311
1312
1313 /***************************************************************************
1314 Make (and fill) a user_info struct from a 'struct passwd' by conversion
1315 to a struct samu
1316 ***************************************************************************/
1317
1318 NTSTATUS make_server_info_pw(auth_serversupplied_info **server_info,
1319 char *unix_username,
1320 struct passwd *pwd)
1321 {
1322 NTSTATUS status;
1323 struct samu *sampass = NULL;
1324 gid_t *gids;
1325 auth_serversupplied_info *result;
1326
1327 if ( !(sampass = samu_new( NULL )) ) {
1328 return NT_STATUS_NO_MEMORY;
1329 }
1330
1331 status = samu_set_unix( sampass, pwd );
1332 if (!NT_STATUS_IS_OK(status)) {
1333 return status;
1334 }
1335
1336 result = make_server_info(NULL);
1337 if (result == NULL) {
1338 TALLOC_FREE(sampass);
1339 return NT_STATUS_NO_MEMORY;
1340 }
1341
1342 result->sam_account = sampass;
1343 result->unix_name = talloc_strdup(result, unix_username);
1344 result->uid = pwd->pw_uid;
1345 result->gid = pwd->pw_gid;
1346
1347 status = pdb_enum_group_memberships(result, sampass,
1348 &result->sids, &gids,
1349 &result->num_sids);
1350
1351 if (!NT_STATUS_IS_OK(status)) {
1352 DEBUG(10, ("pdb_enum_group_memberships failed: %s\n",
1353 nt_errstr(status)));
1354 TALLOC_FREE(result);
1355 return status;
1356 }
1357
1358 /* For now we throw away the gids and convert via sid_to_gid
1359 * later. This needs fixing, but I'd like to get the code straight and
1360 * simple first. */
1361 TALLOC_FREE(gids);
1362
1363 *server_info = result;
1364
1365 return NT_STATUS_OK;
1366 }
1367
1368 /***************************************************************************
1369 Make (and fill) a user_info struct for a guest login.
1370 This *must* succeed for smbd to start. If there is no mapping entry for
1371 the guest gid, then create one.
1372 ***************************************************************************/
1373
1374 static NTSTATUS make_new_server_info_guest(auth_serversupplied_info **server_info)
1375 {
1376 NTSTATUS status;
1377 struct samu *sampass = NULL;
1378 DOM_SID guest_sid;
1379 BOOL ret;
1380 static const char zeros[16];
1381
1382 if ( !(sampass = samu_new( NULL )) ) {
1383 return NT_STATUS_NO_MEMORY;
1384 }
1385
1386 sid_copy(&guest_sid, get_global_sam_sid());
1387 sid_append_rid(&guest_sid, DOMAIN_USER_RID_GUEST);
1388
1389 become_root();
1390 ret = pdb_getsampwsid(sampass, &guest_sid);
1391 unbecome_root();
1392
1393 if (!ret) {
1394 TALLOC_FREE(sampass);
1395 return NT_STATUS_NO_SUCH_USER;
1396 }
1397
1398 status = make_server_info_sam(server_info, sampass);
1399 if (!NT_STATUS_IS_OK(status)) {
1400 TALLOC_FREE(sampass);
1401 return status;
1402 }
1403
1404 (*server_info)->guest = True;
1405
1406 status = create_local_token(*server_info);
1407 if (!NT_STATUS_IS_OK(status)) {
1408 DEBUG(10, ("create_local_token failed: %s\n",
1409 nt_errstr(status)));
1410 return status;
1411 }
1412
1413 /* annoying, but the Guest really does have a session key, and it is
1414 all zeros! */
1415 (*server_info)->user_session_key = data_blob(zeros, sizeof(zeros));
1416 (*server_info)->lm_session_key = data_blob(zeros, sizeof(zeros));
1417
1418 return NT_STATUS_OK;
1419 }
1420
1421 static auth_serversupplied_info *copy_serverinfo(auth_serversupplied_info *src)
1422 {
1423 auth_serversupplied_info *dst;
1424
1425 dst = make_server_info(NULL);
1426 if (dst == NULL) {
1427 return NULL;
1428 }
1429
1430 dst->guest = src->guest;
1431 dst->uid = src->uid;
1432 dst->gid = src->gid;
1433 dst->n_groups = src->n_groups;
1434 if (src->n_groups != 0) {
1435 dst->groups = talloc_memdup(dst, src->groups,
1436 sizeof(gid_t)*dst->n_groups);
1437 } else {
1438 dst->groups = NULL;
1439 }
1440
1441 if (src->ptok) {
1442 dst->ptok = dup_nt_token(dst, src->ptok);
1443 if (!dst->ptok) {
1444 TALLOC_FREE(dst);
1445 return NULL;
1446 }
1447 }
1448
1449 dst->user_session_key = data_blob_talloc( dst, src->user_session_key.data,
1450 src->user_session_key.length);
1451
1452 dst->lm_session_key = data_blob_talloc(dst, src->lm_session_key.data,
1453 src->lm_session_key.length);
1454
1455 dst->sam_account = samu_new(NULL);
1456 if (!dst->sam_account) {
1457 TALLOC_FREE(dst);
1458 return NULL;
1459 }
1460
1461 if (!pdb_copy_sam_account(dst->sam_account, src->sam_account)) {
1462 TALLOC_FREE(dst);
1463 return NULL;
1464 }
1465
1466 dst->pam_handle = NULL;
1467 dst->unix_name = talloc_strdup(dst, src->unix_name);
1468 if (!dst->unix_name) {
1469 TALLOC_FREE(dst);
1470 return NULL;
1471 }
1472
1473 return dst;
1474 }
1475
1476 static auth_serversupplied_info *guest_info = NULL;
1477
1478 BOOL init_guest_info(void)
1479 {
1480 if (guest_info != NULL)
1481 return True;
1482
1483 return NT_STATUS_IS_OK(make_new_server_info_guest(&guest_info));
1484 }
1485
1486 NTSTATUS make_server_info_guest(auth_serversupplied_info **server_info)
1487 {
1488 *server_info = copy_serverinfo(guest_info);
1489 return (*server_info != NULL) ? NT_STATUS_OK : NT_STATUS_NO_MEMORY;
1490 }
1491
1492 /***************************************************************************
1493 Purely internal function for make_server_info_info3
1494 Fill the sam account from getpwnam
1495 ***************************************************************************/
1496 static NTSTATUS fill_sam_account(TALLOC_CTX *mem_ctx,
1497 const char *domain,
1498 const char *username,
1499 char **found_username,
1500 uid_t *uid, gid_t *gid,
1501 struct samu *account,
1502 BOOL *username_was_mapped)
1503 {
1504 NTSTATUS nt_status;
1505 fstring dom_user, lower_username;
1506 fstring real_username;
1507 struct passwd *passwd;
1508
1509 fstrcpy( lower_username, username );
1510 strlower_m( lower_username );
1511
1512 fstr_sprintf(dom_user, "%s%c%s", domain, *lp_winbind_separator(),
1513 lower_username);
1514
1515 /* Get the passwd struct. Try to create the account is necessary. */
1516
1517 *username_was_mapped = map_username( dom_user );
1518
1519 if ( !(passwd = smb_getpwnam( NULL, dom_user, real_username, True )) )
1520 return NT_STATUS_NO_SUCH_USER;
1521
1522 *uid = passwd->pw_uid;
1523 *gid = passwd->pw_gid;
1524
1525 /* This is pointless -- there is no suport for differing
1526 unix and windows names. Make sure to always store the
1527 one we actually looked up and succeeded. Have I mentioned
1528 why I hate the 'winbind use default domain' parameter?
1529 --jerry */
1530
1531 *found_username = talloc_strdup( mem_ctx, real_username );
1532
1533 DEBUG(5,("fill_sam_account: located username was [%s]\n", *found_username));
1534
1535 nt_status = samu_set_unix( account, passwd );
1536
1537 TALLOC_FREE(passwd);
1538
1539 return nt_status;
1540 }
1541
1542 /****************************************************************************
1543 Wrapper to allow the getpwnam() call to strip the domain name and
1544 try again in case a local UNIX user is already there. Also run through
1545 the username if we fallback to the username only.
1546 ****************************************************************************/
1547
1548 struct passwd *smb_getpwnam( TALLOC_CTX *mem_ctx, char *domuser,
1549 fstring save_username, BOOL create )
1550 {
1551 struct passwd *pw = NULL;
1552 char *p;
1553 fstring username;
1554
1555 /* we only save a copy of the username it has been mangled
1556 by winbindd use default domain */
1557
1558 save_username[0] = '\0';
1559
1560 /* don't call map_username() here since it has to be done higher
1561 up the stack so we don't call it mutliple times */
1562
1563 fstrcpy( username, domuser );
1564
1565 p = strchr_m( username, *lp_winbind_separator() );
1566
1567 /* code for a DOMAIN\user string */
1568
1569 if ( p ) {
1570 fstring strip_username;
1571
1572 pw = Get_Pwnam_alloc( mem_ctx, domuser );
1573 if ( pw ) {
1574 /* make sure we get the case of the username correct */
1575 /* work around 'winbind use default domain = yes' */
1576
1577 if ( !strchr_m( pw->pw_name, *lp_winbind_separator() ) ) {
1578 char *domain;
1579
1580 /* split the domain and username into 2 strings */
1581 *p = '\0';
1582 domain = username;
1583
1584 fstr_sprintf(save_username, "%s%c%s", domain, *lp_winbind_separator(), pw->pw_name);
1585 }
1586 else
1587 fstrcpy( save_username, pw->pw_name );
1588
1589 /* whew -- done! */
1590 return pw;
1591 }
1592
1593 /* setup for lookup of just the username */
1594 /* remember that p and username are overlapping memory */
1595
1596 p++;
1597 fstrcpy( strip_username, p );
1598 fstrcpy( username, strip_username );
1599 }
1600
1601 /* just lookup a plain username */
1602
1603 pw = Get_Pwnam_alloc(mem_ctx, username);
1604
1605 /* Create local user if requested but only if winbindd
1606 is not running. We need to protect against cases
1607 where winbindd is failing and then prematurely
1608 creating users in /etc/passwd */
1609
1610 if ( !pw && create && !winbind_ping() ) {
1611 /* Don't add a machine account. */
1612 if (username[strlen(username)-1] == '$')
1613 return NULL;
1614
1615 smb_create_user(NULL, username, NULL);
1616 pw = Get_Pwnam_alloc(mem_ctx, username);
1617 }
1618
1619 /* one last check for a valid passwd struct */
1620
1621 if ( pw )
1622 fstrcpy( save_username, pw->pw_name );
1623
1624 return pw;
1625 }
1626
1627 /***************************************************************************
1628 Make a server_info struct from the info3 returned by a domain logon
1629 ***************************************************************************/
1630
1631 NTSTATUS make_server_info_info3(TALLOC_CTX *mem_ctx,
1632 const char *sent_nt_username,
1633 const char *domain,
1634 auth_serversupplied_info **server_info,
1635 NET_USER_INFO_3 *info3)
1636 {
1637 static const char zeros[16];
1638
1639 NTSTATUS nt_status = NT_STATUS_OK;
1640 char *found_username;
1641 const char *nt_domain;
1642 const char *nt_username;
1643 struct samu *sam_account = NULL;
1644 DOM_SID user_sid;
1645 DOM_SID group_sid;
1646 BOOL username_was_mapped;
1647
1648 uid_t uid;
1649 gid_t gid;
1650
1651 size_t i;
1652
1653 auth_serversupplied_info *result;
1654
1655 /*
1656 Here is where we should check the list of
1657 trusted domains, and verify that the SID
1658 matches.
1659 */
1660
1661 sid_copy(&user_sid, &info3->dom_sid.sid);
1662 if (!sid_append_rid(&user_sid, info3->user_rid)) {
1663 return NT_STATUS_INVALID_PARAMETER;
1664 }
1665
1666 sid_copy(&group_sid, &info3->dom_sid.sid);
1667 if (!sid_append_rid(&group_sid, info3->group_rid)) {
1668 return NT_STATUS_INVALID_PARAMETER;
1669 }
1670
1671 if (!(nt_username = unistr2_tdup(mem_ctx, &(info3->uni_user_name)))) {
1672 /* If the server didn't give us one, just use the one we sent
1673 * them */
1674 nt_username = sent_nt_username;
1675 }
1676
1677 if (!(nt_domain = unistr2_tdup(mem_ctx, &(info3->uni_logon_dom)))) {
1678 /* If the server didn't give us one, just use the one we sent
1679 * them */
1680 nt_domain = domain;
1681 }
1682
1683 /* try to fill the SAM account.. If getpwnam() fails, then try the
1684 add user script (2.2.x behavior).
1685
1686 We use the _unmapped_ username here in an attempt to provide
1687 consistent username mapping behavior between kerberos and NTLM[SSP]
1688 authentication in domain mode security. I.E. Username mapping
1689 should be applied to the fully qualified username
1690 (e.g. DOMAIN\user) and not just the login name. Yes this means we
1691 called map_username() unnecessarily in make_user_info_map() but
1692 that is how the current code is designed. Making the change here
1693 is the least disruptive place. -- jerry */
1694
1695 if ( !(sam_account = samu_new( NULL )) ) {
1696 return NT_STATUS_NO_MEMORY;
1697 }
1698
1699 /* this call will try to create the user if necessary */
1700
1701 nt_status = fill_sam_account(mem_ctx, nt_domain, sent_nt_username,
1702 &found_username, &uid, &gid, sam_account,
1703 &username_was_mapped);
1704
1705
1706 /* if we still don't have a valid unix account check for
1707 'map to guest = bad uid' */
1708
1709 if (!NT_STATUS_IS_OK(nt_status)) {
1710 TALLOC_FREE( sam_account );
1711 if ( lp_map_to_guest() == MAP_TO_GUEST_ON_BAD_UID ) {
1712 make_server_info_guest(server_info);
1713 return NT_STATUS_OK;
1714 }
1715 return nt_status;
1716 }
1717
1718 if (!pdb_set_nt_username(sam_account, nt_username, PDB_CHANGED)) {
1719 TALLOC_FREE(sam_account);
1720 return NT_STATUS_NO_MEMORY;
1721 }
1722
1723 if (!pdb_set_username(sam_account, nt_username, PDB_CHANGED)) {
1724 TALLOC_FREE(sam_account);
1725 return NT_STATUS_NO_MEMORY;
1726 }
1727
1728 if (!pdb_set_domain(sam_account, nt_domain, PDB_CHANGED)) {
1729 TALLOC_FREE(sam_account);
1730 return NT_STATUS_NO_MEMORY;
1731 }
1732
1733 if (!pdb_set_user_sid(sam_account, &user_sid, PDB_CHANGED)) {
1734 TALLOC_FREE(sam_account);
1735 return NT_STATUS_UNSUCCESSFUL;
1736 }
1737
1738 if (!pdb_set_group_sid(sam_account, &group_sid, PDB_CHANGED)) {
1739 TALLOC_FREE(sam_account);
1740 return NT_STATUS_UNSUCCESSFUL;
1741 }
1742
1743 if (!pdb_set_fullname(sam_account,
1744 unistr2_static(&(info3->uni_full_name)),
1745 PDB_CHANGED)) {
1746 TALLOC_FREE(sam_account);
1747 return NT_STATUS_NO_MEMORY;
1748 }
1749
1750 if (!pdb_set_logon_script(sam_account,
1751 unistr2_static(&(info3->uni_logon_script)),
1752 PDB_CHANGED)) {
1753 TALLOC_FREE(sam_account);
1754 return NT_STATUS_NO_MEMORY;
1755 }
1756
1757 if (!pdb_set_profile_path(sam_account,
1758 unistr2_static(&(info3->uni_profile_path)),
1759 PDB_CHANGED)) {
1760 TALLOC_FREE(sam_account);
1761 return NT_STATUS_NO_MEMORY;
1762 }
1763
1764 if (!pdb_set_homedir(sam_account,
1765 unistr2_static(&(info3->uni_home_dir)),
1766 PDB_CHANGED)) {
1767 TALLOC_FREE(sam_account);
1768 return NT_STATUS_NO_MEMORY;
1769 }
1770
1771 if (!pdb_set_dir_drive(sam_account,
1772 unistr2_static(&(info3->uni_dir_drive)),
1773 PDB_CHANGED)) {
1774 TALLOC_FREE(sam_account);
1775 return NT_STATUS_NO_MEMORY;
1776 }
1777
1778 if (!pdb_set_acct_ctrl(sam_account, info3->acct_flags, PDB_CHANGED)) {
1779 TALLOC_FREE(sam_account);
1780 return NT_STATUS_NO_MEMORY;
1781 }
1782
1783 result = make_server_info(NULL);
1784 if (result == NULL) {
1785 DEBUG(4, ("make_server_info failed!\n"));
1786 TALLOC_FREE(sam_account);
1787 return NT_STATUS_NO_MEMORY;
1788 }
1789
1790 /* save this here to _net_sam_logon() doesn't fail (it assumes a
1791 valid struct samu) */
1792
1793 result->sam_account = sam_account;
1794 result->unix_name = talloc_strdup(result, found_username);
1795
1796 /* Fill in the unix info we found on the way */
1797
1798 result->uid = uid;
1799 result->gid = gid;
1800
1801 /* Create a 'combined' list of all SIDs we might want in the SD */
1802
1803 result->num_sids = 0;
1804 result->sids = NULL;
1805
1806 /* and create (by appending rids) the 'domain' sids */
1807
1808 for (i = 0; i < info3->num_groups2; i++) {
1809 DOM_SID sid;
1810 if (!sid_compose(&sid, &info3->dom_sid.sid,
1811 info3->gids[i].g_rid)) {
1812 DEBUG(3,("could not append additional group rid "
1813 "0x%x\n", info3->gids[i].g_rid));
1814 TALLOC_FREE(result);
1815 return NT_STATUS_INVALID_PARAMETER;
1816 }
1817 add_sid_to_array(result, &sid, &result->sids,
1818 &result->num_sids);
1819 }
1820
1821 /* Copy 'other' sids. We need to do sid filtering here to
1822 prevent possible elevation of privileges. See:
1823
1824 http://www.microsoft.com/windows2000/techinfo/administration/security/sidfilter.asp
1825 */
1826
1827 for (i = 0; i < info3->num_other_sids; i++) {
1828 add_sid_to_array(result, &info3->other_sids[i].sid,
1829 &result->sids,
1830 &result->num_sids);
1831 }
1832
1833 result->login_server = unistr2_tdup(result,
1834 &(info3->uni_logon_srv));
1835
1836 /* ensure we are never given NULL session keys */
1837
1838 if (memcmp(info3->user_sess_key, zeros, sizeof(zeros)) == 0) {
1839 result->user_session_key = data_blob(NULL, 0);
1840 } else {
1841 result->user_session_key = data_blob_talloc(
1842 result, info3->user_sess_key,
1843 sizeof(info3->user_sess_key));
1844 }
1845
1846 if (memcmp(info3->lm_sess_key, zeros, 8) == 0) {
1847 result->lm_session_key = data_blob(NULL, 0);
1848 } else {
1849 result->lm_session_key = data_blob_talloc(
1850 result, info3->lm_sess_key,
1851 sizeof(info3->lm_sess_key));
1852 }
1853
1854 result->was_mapped = username_was_mapped;
1855
1856 *server_info = result;
1857
1858 return NT_STATUS_OK;
1859 }
1860
1861 /***************************************************************************
1862 Free a user_info struct
1863 ***************************************************************************/
1864
1865 void free_user_info(auth_usersupplied_info **user_info)
1866 {
1867 DEBUG(5,("attempting to free (and zero) a user_info structure\n"));
1868 if (*user_info != NULL) {
1869 if ((*user_info)->smb_name) {
1870 DEBUG(10,("structure was created for %s\n",
1871 (*user_info)->smb_name));
1872 }
1873 SAFE_FREE((*user_info)->smb_name);
1874 SAFE_FREE((*user_info)->internal_username);
1875 SAFE_FREE((*user_info)->client_domain);
1876 SAFE_FREE((*user_info)->domain);
1877 SAFE_FREE((*user_info)->wksta_name);
1878 data_blob_free(&(*user_info)->lm_resp);
1879 data_blob_free(&(*user_info)->nt_resp);
1880 data_blob_clear_free(&(*user_info)->lm_interactive_pwd);
1881 data_blob_clear_free(&(*user_info)->nt_interactive_pwd);
1882 data_blob_clear_free(&(*user_info)->plaintext_password);
1883 ZERO_STRUCT(**user_info);
1884 }
1885 SAFE_FREE(*user_info);
1886 }
1887
1888 /***************************************************************************
1889 Make an auth_methods struct
1890 ***************************************************************************/
1891
1892 BOOL make_auth_methods(struct auth_context *auth_context, auth_methods **auth_method)
1893 {
1894 if (!auth_context) {
1895 smb_panic("no auth_context supplied to "
1896 "make_auth_methods()!\n");
1897 }
1898
1899 if (!auth_method) {
1900 smb_panic("make_auth_methods: pointer to auth_method pointer "
1901 "is NULL!\n");
1902 }
1903
1904 *auth_method = TALLOC_P(auth_context->mem_ctx, auth_methods);
1905 if (!*auth_method) {
1906 DEBUG(0,("make_auth_method: malloc failed!\n"));
1907 return False;
1908 }
1909 ZERO_STRUCTP(*auth_method);
1910
1911 return True;
1912 }
1913
1914 /****************************************************************************
1915 Duplicate a SID token.
1916 ****************************************************************************/
1917
1918 NT_USER_TOKEN *dup_nt_token(TALLOC_CTX *mem_ctx, NT_USER_TOKEN *ptoken)
1919 {
1920 NT_USER_TOKEN *token;
1921
1922 if (!ptoken)
1923 return NULL;
1924
1925 token = TALLOC_P(mem_ctx, NT_USER_TOKEN);
1926 if (token == NULL) {
1927 DEBUG(0, ("talloc failed\n"));
1928 return NULL;
1929 }
1930
1931 ZERO_STRUCTP(token);
1932
1933 if (ptoken->user_sids && ptoken->num_sids) {
1934 token->user_sids = talloc_memdup(token, ptoken->user_sids,
1935 sizeof(DOM_SID) * ptoken->num_sids );
1936
1937 if (token->user_sids == NULL) {
1938 DEBUG(0, ("talloc_memdup failed\n"));
1939 TALLOC_FREE(token);
1940 return NULL;
1941 }
1942 token->num_sids = ptoken->num_sids;
1943 }
1944
1945 /* copy the privileges; don't consider failure to be critical here */
1946
1947 if ( !se_priv_copy( &token->privileges, &ptoken->privileges ) ) {
1948 DEBUG(0,("dup_nt_token: Failure to copy SE_PRIV!. "
1949 "Continuing with 0 privileges assigned.\n"));
1950 }
1951
1952 return token;
1953 }
1954
1955 /****************************************************************************
1956 Check for a SID in an NT_USER_TOKEN
1957 ****************************************************************************/
1958
1959 BOOL nt_token_check_sid ( const DOM_SID *sid, const NT_USER_TOKEN *token )
1960 {
1961 int i;
1962
1963 if ( !sid || !token )
1964 return False;
1965
1966 for ( i=0; i<token->num_sids; i++ ) {
1967 if ( sid_equal( sid, &token->user_sids[i] ) )
1968 return True;
1969 }
1970
1971 return False;
1972 }
1973
1974 BOOL nt_token_check_domain_rid( NT_USER_TOKEN *token, uint32 rid )
1975 {
1976 DOM_SID domain_sid;
1977
1978 /* if we are a domain member, the get the domain SID, else for
1979 a DC or standalone server, use our own SID */
1980
1981 if ( lp_server_role() == ROLE_DOMAIN_MEMBER ) {
1982 if ( !secrets_fetch_domain_sid( lp_workgroup(),
1983 &domain_sid ) ) {
1984 DEBUG(1,("nt_token_check_domain_rid: Cannot lookup "
1985 "SID for domain [%s]\n", lp_workgroup()));
1986 return False;
1987 }
1988 }
1989 else
1990 sid_copy( &domain_sid, get_global_sam_sid() );
1991
1992 sid_append_rid( &domain_sid, rid );
1993
1994 return nt_token_check_sid( &domain_sid, token );\
1995 }
1996
1997 /**
1998 * Verify whether or not given domain is trusted.
1999 *
2000 * @param domain_name name of the domain to be verified
2001 * @return true if domain is one of the trusted once or
2002 * false if otherwise
2003 **/
2004
2005 BOOL is_trusted_domain(const char* dom_name)
2006 {
2007 DOM_SID trustdom_sid;
2008 BOOL ret;
2009
2010 /* no trusted domains for a standalone server */
2011
2012 if ( lp_server_role() == ROLE_STANDALONE )
2013 return False;
2014
2015 /* if we are a DC, then check for a direct trust relationships */
2016
2017 if ( IS_DC ) {
2018 become_root();
2019 DEBUG (5,("is_trusted_domain: Checking for domain trust with "
2020 "[%s]\n", dom_name ));
2021 ret = secrets_fetch_trusted_domain_password(dom_name, NULL,
2022 NULL, NULL);
2023 unbecome_root();
2024 if (ret)
2025 return True;
2026 }
2027 else {
2028 NSS_STATUS result;
2029
2030 /* If winbind is around, ask it */
2031
2032 result = wb_is_trusted_domain(dom_name);
2033
2034 if (result == NSS_STATUS_SUCCESS) {
2035 return True;
2036 }
2037
2038 if (result == NSS_STATUS_NOTFOUND) {
2039 /* winbind could not find the domain */
2040 return False;
2041 }
2042
2043 /* The only other possible result is that winbind is not up
2044 and running. We need to update the trustdom_cache
2045 ourselves */
2046
2047 update_trustdom_cache();
2048 }
2049
2050 /* now the trustdom cache should be available a DC could still
2051 * have a transitive trust so fall back to the cache of trusted
2052 * domains (like a domain member would use */
2053
2054 if ( trustdom_cache_fetch(dom_name, &trustdom_sid) ) {
2055 return True;
2056 }
2057
2058 return False;
2059 }
2060
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