?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
This is a nice rewrite:
[Samba.git] / source3 / auth / auth_util.c
blob56a1e9bb9602cb16f379516e5eb29bbbee715b39
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
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
13
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
18
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 */
23
24 #include "includes.h"
25
26 #undef DBGC_CLASS
27 #define DBGC_CLASS DBGC_AUTH
28
29 extern DOM_SID global_sid_World;
30 extern DOM_SID global_sid_Network;
31 extern DOM_SID global_sid_Builtin_Guests;
32 extern DOM_SID global_sid_Authenticated_Users;
33
34
35 /****************************************************************************
36 Create a UNIX user on demand.
37 ****************************************************************************/
38
39 static int smb_create_user(const char *unix_user, const char *homedir)
40 {
41 pstring add_script;
42 int ret;
43
44 pstrcpy(add_script, lp_adduser_script());
45 if (! *add_script)
46 return -1;
47 all_string_sub(add_script, "%u", unix_user, sizeof(pstring));
48 if (homedir)
49 all_string_sub(add_script, "%H", homedir, sizeof(pstring));
50 ret = smbrun(add_script,NULL);
51 DEBUG(3,("smb_create_user: Running the command `%s' gave %d\n",add_script,ret));
52 return ret;
53 }
54
55 /****************************************************************************
56 Add and Delete UNIX users on demand, based on NTSTATUS codes.
57 ****************************************************************************/
58
59 void smb_user_control(const auth_usersupplied_info *user_info, auth_serversupplied_info *server_info, NTSTATUS nt_status)
60 {
61 struct passwd *pwd=NULL;
62
63 if (NT_STATUS_IS_OK(nt_status)) {
64
65 if (!(server_info->sam_fill_level & SAM_FILL_UNIX)) {
66
67 /*
68 * User validated ok against Domain controller.
69 * If the admin wants us to try and create a UNIX
70 * user on the fly, do so.
71 */
72
73 if(lp_adduser_script() && !(pwd = Get_Pwnam(user_info->internal_username.str))) {
74 smb_create_user(user_info->internal_username.str, NULL);
75 }
76 }
77 }
78 }
79
80 /****************************************************************************
81 Create a SAM_ACCOUNT - either by looking in the pdb, or by faking it up from
82 unix info.
83 ****************************************************************************/
84
85 NTSTATUS auth_get_sam_account(const char *user, SAM_ACCOUNT **account)
86 {
87 BOOL pdb_ret;
88 NTSTATUS nt_status;
89 if (!NT_STATUS_IS_OK(nt_status = pdb_init_sam(account))) {
90 return nt_status;
91 }
92
93 become_root();
94 pdb_ret = pdb_getsampwnam(*account, user);
95 unbecome_root();
96
97 if (!pdb_ret) {
98
99 struct passwd *pass = Get_Pwnam(user);
100 if (!pass)
101 return NT_STATUS_NO_SUCH_USER;
102
103 if (!NT_STATUS_IS_OK(nt_status = pdb_fill_sam_pw(*account, pass))) {
104 return nt_status;
105 }
106 }
107 return NT_STATUS_OK;
108 }
109
110 /****************************************************************************
111 Create an auth_usersupplied_data structure
112 ****************************************************************************/
113
114 static NTSTATUS make_user_info(auth_usersupplied_info **user_info,
115 const char *smb_name,
116 const char *internal_username,
117 const char *client_domain,
118 const char *domain,
119 const char *wksta_name,
120 DATA_BLOB lm_pwd, DATA_BLOB nt_pwd,
121 DATA_BLOB plaintext,
122 uint32 auth_flags, BOOL encrypted)
123 {
124
125 DEBUG(5,("attempting to make a user_info for %s (%s)\n", internal_username, smb_name));
126
127 *user_info = malloc(sizeof(**user_info));
128 if (!user_info) {
129 DEBUG(0,("malloc failed for user_info (size %d)\n", sizeof(*user_info)));
130 return NT_STATUS_NO_MEMORY;
131 }
132
133 ZERO_STRUCTP(*user_info);
134
135 DEBUG(5,("making strings for %s's user_info struct\n", internal_username));
136
137 (*user_info)->smb_name.str = strdup(smb_name);
138 if ((*user_info)->smb_name.str) {
139 (*user_info)->smb_name.len = strlen(smb_name);
140 } else {
141 free_user_info(user_info);
142 return NT_STATUS_NO_MEMORY;
143 }
144
145 (*user_info)->internal_username.str = strdup(internal_username);
146 if ((*user_info)->internal_username.str) {
147 (*user_info)->internal_username.len = strlen(internal_username);
148 } else {
149 free_user_info(user_info);
150 return NT_STATUS_NO_MEMORY;
151 }
152
153 (*user_info)->domain.str = strdup(domain);
154 if ((*user_info)->domain.str) {
155 (*user_info)->domain.len = strlen(domain);
156 } else {
157 free_user_info(user_info);
158 return NT_STATUS_NO_MEMORY;
159 }
160
161 (*user_info)->client_domain.str = strdup(client_domain);
162 if ((*user_info)->client_domain.str) {
163 (*user_info)->client_domain.len = strlen(client_domain);
164 } else {
165 free_user_info(user_info);
166 return NT_STATUS_NO_MEMORY;
167 }
168
169 (*user_info)->wksta_name.str = strdup(wksta_name);
170 if ((*user_info)->wksta_name.str) {
171 (*user_info)->wksta_name.len = strlen(wksta_name);
172 } else {
173 free_user_info(user_info);
174 return NT_STATUS_NO_MEMORY;
175 }
176
177 DEBUG(5,("making blobs for %s's user_info struct\n", internal_username));
178
179 (*user_info)->lm_resp = data_blob(lm_pwd.data, lm_pwd.length);
180 (*user_info)->nt_resp = data_blob(nt_pwd.data, nt_pwd.length);
181 (*user_info)->plaintext_password = data_blob(plaintext.data, plaintext.length);
182
183 (*user_info)->encrypted = encrypted;
184 (*user_info)->auth_flags = auth_flags;
185
186 DEBUG(10,("made an %sencrypted user_info for %s (%s)\n", encrypted ? "":"un" , internal_username, smb_name));
187
188 return NT_STATUS_OK;
189 }
190
191 /****************************************************************************
192 Create an auth_usersupplied_data structure after appropriate mapping.
193 ****************************************************************************/
194
195 NTSTATUS make_user_info_map(auth_usersupplied_info **user_info,
196 const char *smb_name,
197 const char *client_domain,
198 const char *wksta_name,
199 DATA_BLOB lm_pwd, DATA_BLOB nt_pwd,
200 DATA_BLOB plaintext,
201 uint32 ntlmssp_flags, BOOL encrypted)
202 {
203 const char *domain;
204 fstring internal_username;
205 fstrcpy(internal_username, smb_name);
206 map_username(internal_username);
207
208 DEBUG(5, ("make_user_info_map: Mapping user [%s]\\[%s] from workstation [%s]\n",
209 client_domain, smb_name, wksta_name));
210
211 if (lp_allow_trusted_domains() && *client_domain) {
212
213 /* the client could have given us a workstation name
214 or other crap for the workgroup - we really need a
215 way of telling if this domain name is one of our
216 trusted domain names
217
218 Also don't allow "" as a domain, fixes a Win9X bug
219 where it doens't supply a domain for logon script
220 'net use' commands.
221
222 Finally, we do this by looking up a cache of trusted domains!
223 */
224
225 domain = client_domain;
226
227 if (is_trusted_domain(domain)) {
228 return make_user_info(user_info, smb_name, internal_username,
229 client_domain, domain, wksta_name,
230 lm_pwd, nt_pwd, plaintext, ntlmssp_flags,
231 encrypted);
232 }
233
234 } else {
235 domain = lp_workgroup();
236 }
237
238 return make_user_info(user_info,
239 smb_name, internal_username,
240 client_domain, domain,
241 wksta_name,
242 lm_pwd, nt_pwd,
243 plaintext,
244 ntlmssp_flags, encrypted);
245
246 }
247
248 /****************************************************************************
249 Create an auth_usersupplied_data, making the DATA_BLOBs here.
250 Decrypt and encrypt the passwords.
251 ****************************************************************************/
252
253 BOOL make_user_info_netlogon_network(auth_usersupplied_info **user_info,
254 const char *smb_name,
255 const char *client_domain,
256 const char *wksta_name,
257 const uchar *lm_network_pwd, int lm_pwd_len,
258 const uchar *nt_network_pwd, int nt_pwd_len)
259 {
260 BOOL ret;
261 NTSTATUS nt_status;
262 DATA_BLOB lm_blob = data_blob(lm_network_pwd, lm_pwd_len);
263 DATA_BLOB nt_blob = data_blob(nt_network_pwd, nt_pwd_len);
264 DATA_BLOB plaintext_blob = data_blob(NULL, 0);
265 uint32 auth_flags = AUTH_FLAG_NONE;
266
267 if (lm_pwd_len)
268 auth_flags |= AUTH_FLAG_LM_RESP;
269 if (nt_pwd_len == 24) {
270 auth_flags |= AUTH_FLAG_NTLM_RESP;
271 } else if (nt_pwd_len != 0) {
272 auth_flags |= AUTH_FLAG_NTLMv2_RESP;
273 }
274
275 nt_status = make_user_info_map(user_info,
276 smb_name, client_domain,
277 wksta_name,
278 lm_blob, nt_blob,
279 plaintext_blob,
280 auth_flags, True);
281
282 ret = NT_STATUS_IS_OK(nt_status) ? True : False;
283
284 data_blob_free(&lm_blob);
285 data_blob_free(&nt_blob);
286 return ret;
287 }
288
289 /****************************************************************************
290 Create an auth_usersupplied_data, making the DATA_BLOBs here.
291 Decrypt and encrypt the passwords.
292 ****************************************************************************/
293
294 BOOL make_user_info_netlogon_interactive(auth_usersupplied_info **user_info,
295 const char *smb_name,
296 const char *client_domain,
297 const char *wksta_name,
298 const uchar chal[8],
299 const uchar lm_interactive_pwd[16],
300 const uchar nt_interactive_pwd[16],
301 const uchar *dc_sess_key)
302 {
303 char lm_pwd[16];
304 char nt_pwd[16];
305 unsigned char local_lm_response[24];
306 unsigned char local_nt_response[24];
307 unsigned char key[16];
308 uint32 auth_flags = AUTH_FLAG_NONE;
309
310 ZERO_STRUCT(key);
311 memcpy(key, dc_sess_key, 8);
312
313 if (lm_interactive_pwd) memcpy(lm_pwd, lm_interactive_pwd, sizeof(lm_pwd));
314 if (nt_interactive_pwd) memcpy(nt_pwd, nt_interactive_pwd, sizeof(nt_pwd));
315
316 #ifdef DEBUG_PASSWORD
317 DEBUG(100,("key:"));
318 dump_data(100, (char *)key, sizeof(key));
319
320 DEBUG(100,("lm owf password:"));
321 dump_data(100, lm_pwd, sizeof(lm_pwd));
322
323 DEBUG(100,("nt owf password:"));
324 dump_data(100, nt_pwd, sizeof(nt_pwd));
325 #endif
326
327 SamOEMhash((uchar *)lm_pwd, key, sizeof(lm_pwd));
328 SamOEMhash((uchar *)nt_pwd, key, sizeof(nt_pwd));
329
330 #ifdef DEBUG_PASSWORD
331 DEBUG(100,("decrypt of lm owf password:"));
332 dump_data(100, lm_pwd, sizeof(lm_pwd));
333
334 DEBUG(100,("decrypt of nt owf password:"));
335 dump_data(100, nt_pwd, sizeof(nt_pwd));
336 #endif
337
338 SMBOWFencrypt((const unsigned char *)lm_pwd, chal, local_lm_response);
339 SMBOWFencrypt((const unsigned char *)nt_pwd, chal, local_nt_response);
340
341 /* Password info paranoia */
342 ZERO_STRUCT(lm_pwd);
343 ZERO_STRUCT(nt_pwd);
344 ZERO_STRUCT(key);
345
346 {
347 BOOL ret;
348 NTSTATUS nt_status;
349 DATA_BLOB local_lm_blob = data_blob(local_lm_response, sizeof(local_lm_response));
350 DATA_BLOB local_nt_blob = data_blob(local_nt_response, sizeof(local_nt_response));
351 DATA_BLOB plaintext_blob = data_blob(NULL, 0);
352
353 if (lm_interactive_pwd)
354 auth_flags |= AUTH_FLAG_LM_RESP;
355 if (nt_interactive_pwd)
356 auth_flags |= AUTH_FLAG_NTLM_RESP;
357
358 nt_status = make_user_info_map(user_info,
359 smb_name, client_domain,
360 wksta_name,
361 local_lm_blob,
362 local_nt_blob,
363 plaintext_blob,
364 auth_flags, True);
365
366 ret = NT_STATUS_IS_OK(nt_status) ? True : False;
367 data_blob_free(&local_lm_blob);
368 data_blob_free(&local_nt_blob);
369 return ret;
370 }
371 }
372
373
374 /****************************************************************************
375 Create an auth_usersupplied_data structure
376 ****************************************************************************/
377
378 BOOL make_user_info_for_reply(auth_usersupplied_info **user_info,
379 const char *smb_name,
380 const char *client_domain,
381 const uint8 chal[8],
382 DATA_BLOB plaintext_password)
383 {
384
385 DATA_BLOB local_lm_blob;
386 DATA_BLOB local_nt_blob;
387 NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
388 uint32 auth_flags = AUTH_FLAG_NONE;
389
390 /*
391 * Not encrypted - do so.
392 */
393
394 DEBUG(5,("make_user_info_for_reply: User passwords not in encrypted format.\n"));
395
396 if (plaintext_password.data) {
397 unsigned char local_lm_response[24];
398
399 #ifdef DEBUG_PASSWORD
400 DEBUG(10,("Unencrypted password (len %d):\n",plaintext_password.length));
401 dump_data(100, plaintext_password.data, plaintext_password.length);
402 #endif
403
404 SMBencrypt( (const uchar *)plaintext_password.data, (const uchar*)chal, local_lm_response);
405 local_lm_blob = data_blob(local_lm_response, 24);
406
407 /* We can't do an NT hash here, as the password needs to be
408 case insensitive */
409 local_nt_blob = data_blob(NULL, 0);
410
411 auth_flags = (AUTH_FLAG_PLAINTEXT | AUTH_FLAG_LM_RESP);
412 } else {
413 local_lm_blob = data_blob(NULL, 0);
414 local_nt_blob = data_blob(NULL, 0);
415 }
416
417 ret = make_user_info_map(user_info, smb_name,
418 client_domain,
419 get_remote_machine_name(),
420 local_lm_blob,
421 local_nt_blob,
422 plaintext_password,
423 auth_flags, False);
424
425 data_blob_free(&local_lm_blob);
426 return NT_STATUS_IS_OK(ret) ? True : False;
427 }
428
429 /****************************************************************************
430 Create an auth_usersupplied_data structure
431 ****************************************************************************/
432
433 NTSTATUS make_user_info_for_reply_enc(auth_usersupplied_info **user_info,
434 const char *smb_name,
435 const char *client_domain,
436 DATA_BLOB lm_resp, DATA_BLOB nt_resp)
437 {
438 uint32 auth_flags = AUTH_FLAG_NONE;
439
440 DATA_BLOB no_plaintext_blob = data_blob(NULL, 0);
441
442 if (lm_resp.length == 24) {
443 auth_flags |= AUTH_FLAG_LM_RESP;
444 }
445 if (nt_resp.length == 0) {
446 } else if (nt_resp.length == 24) {
447 auth_flags |= AUTH_FLAG_NTLM_RESP;
448 } else {
449 auth_flags |= AUTH_FLAG_NTLMv2_RESP;
450 }
451
452 return make_user_info_map(user_info, smb_name,
453 client_domain,
454 get_remote_machine_name(),
455 lm_resp,
456 nt_resp,
457 no_plaintext_blob,
458 auth_flags, True);
459 }
460
461 /****************************************************************************
462 Create a guest user_info blob, for anonymous authenticaion.
463 ****************************************************************************/
464
465 BOOL make_user_info_guest(auth_usersupplied_info **user_info)
466 {
467 DATA_BLOB lm_blob = data_blob(NULL, 0);
468 DATA_BLOB nt_blob = data_blob(NULL, 0);
469 DATA_BLOB plaintext_blob = data_blob(NULL, 0);
470 uint32 auth_flags = AUTH_FLAG_NONE;
471 NTSTATUS nt_status;
472
473 nt_status = make_user_info(user_info,
474 "","",
475 "","",
476 "",
477 nt_blob, lm_blob,
478 plaintext_blob,
479 auth_flags, True);
480
481 return NT_STATUS_IS_OK(nt_status) ? True : False;
482 }
483
484 /****************************************************************************
485 prints a NT_USER_TOKEN to debug output.
486 ****************************************************************************/
487
488 void debug_nt_user_token(int dbg_class, int dbg_lev, NT_USER_TOKEN *token)
489 {
490 fstring sid_str;
491 size_t i;
492
493 if (!token) {
494 DEBUGC(dbg_class, dbg_lev, ("NT user token: (NULL)\n"));
495 return;
496 }
497
498 DEBUGC(dbg_class, dbg_lev, ("NT user token of user %s\n",
499 sid_to_string(sid_str, &token->user_sids[0]) ));
500 DEBUGADDC(dbg_class, dbg_lev, ("contains %i SIDs\n", token->num_sids));
501 for (i = 0; i < token->num_sids; i++)
502 DEBUGADDC(dbg_class, dbg_lev, ("SID[%3i]: %s\n", i,
503 sid_to_string(sid_str, &token->user_sids[i])));
504 }
505
506 /****************************************************************************
507 prints a UNIX 'token' to debug output.
508 ****************************************************************************/
509
510 void debug_unix_user_token(int dbg_class, int dbg_lev, uid_t uid, gid_t gid, int n_groups, gid_t *groups)
511 {
512 int i;
513 DEBUGC(dbg_class, dbg_lev, ("UNIX token of user %ld\n", (long int)uid));
514
515 DEBUGADDC(dbg_class, dbg_lev, ("Primary group is %ld and contains %i supplementary groups\n", (long int)gid, n_groups));
516 for (i = 0; i < n_groups; i++)
517 DEBUGADDC(dbg_class, dbg_lev, ("Group[%3i]: %ld\n", i,
518 (long int)groups[i]));
519 }
520
521 /****************************************************************************
522 Create the SID list for this user.
523 ****************************************************************************/
524
525 static NTSTATUS create_nt_user_token(const DOM_SID *user_sid, const DOM_SID *group_sid,
526 int n_groupSIDs, DOM_SID *groupSIDs,
527 BOOL is_guest, NT_USER_TOKEN **token)
528 {
529 NTSTATUS nt_status = NT_STATUS_OK;
530 NT_USER_TOKEN *ptoken;
531 int i;
532 int sid_ndx;
533
534 if ((ptoken = malloc( sizeof(NT_USER_TOKEN) ) ) == NULL) {
535 DEBUG(0, ("create_nt_token: Out of memory allocating token\n"));
536 nt_status = NT_STATUS_NO_MEMORY;
537 return nt_status;
538 }
539
540 ZERO_STRUCTP(ptoken);
541
542 ptoken->num_sids = n_groupSIDs + 5;
543
544 if ((ptoken->user_sids = (DOM_SID *)malloc( sizeof(DOM_SID) * ptoken->num_sids )) == NULL) {
545 DEBUG(0, ("create_nt_token: Out of memory allocating SIDs\n"));
546 nt_status = NT_STATUS_NO_MEMORY;
547 return nt_status;
548 }
549
550 memset((char*)ptoken->user_sids,0,sizeof(DOM_SID) * ptoken->num_sids);
551
552 /*
553 * Note - user SID *MUST* be first in token !
554 * se_access_check depends on this.
555 *
556 * Primary group SID is second in token. Convention.
557 */
558
559 sid_copy(&ptoken->user_sids[PRIMARY_USER_SID_INDEX], user_sid);
560 if (group_sid)
561 sid_copy(&ptoken->user_sids[PRIMARY_GROUP_SID_INDEX], group_sid);
562
563 /*
564 * Finally add the "standard" SIDs.
565 * The only difference between guest and "anonymous" (which we
566 * don't really support) is the addition of Authenticated_Users.
567 */
568
569 sid_copy(&ptoken->user_sids[2], &global_sid_World);
570 sid_copy(&ptoken->user_sids[3], &global_sid_Network);
571
572 if (is_guest)
573 sid_copy(&ptoken->user_sids[4], &global_sid_Builtin_Guests);
574 else
575 sid_copy(&ptoken->user_sids[4], &global_sid_Authenticated_Users);
576
577 sid_ndx = 5; /* next available spot */
578
579 for (i = 0; i < n_groupSIDs; i++) {
580 size_t check_sid_idx;
581 for (check_sid_idx = 1; check_sid_idx < ptoken->num_sids; check_sid_idx++) {
582 if (sid_equal(&ptoken->user_sids[check_sid_idx],
583 &groupSIDs[i])) {
584 break;
585 }
586 }
587
588 if (check_sid_idx >= ptoken->num_sids) /* Not found already */ {
589 sid_copy(&ptoken->user_sids[sid_ndx++], &groupSIDs[i]);
590 } else {
591 ptoken->num_sids--;
592 }
593 }
594
595 debug_nt_user_token(DBGC_AUTH, 10, ptoken);
596
597 *token = ptoken;
598
599 return nt_status;
600 }
601
602 /****************************************************************************
603 Create the SID list for this user.
604 ****************************************************************************/
605
606 NT_USER_TOKEN *create_nt_token(uid_t uid, gid_t gid, int ngroups, gid_t *groups, BOOL is_guest)
607 {
608 DOM_SID user_sid;
609 DOM_SID group_sid;
610 DOM_SID *group_sids;
611 NT_USER_TOKEN *token;
612 int i;
613
614 if (!uid_to_sid(&user_sid, uid)) {
615 return NULL;
616 }
617 if (!gid_to_sid(&group_sid, gid)) {
618 return NULL;
619 }
620
621 group_sids = malloc(sizeof(DOM_SID) * ngroups);
622 if (!group_sids) {
623 DEBUG(0, ("create_nt_token: malloc() failed for DOM_SID list!\n"));
624 return NULL;
625 }
626
627 for (i = 0; i < ngroups; i++) {
628 if (!gid_to_sid(&(group_sids)[i], (groups)[i])) {
629 DEBUG(1, ("create_nt_token: failed to convert gid %ld to a sid!\n", (long int)groups[i]));
630 SAFE_FREE(group_sids);
631 return NULL;
632 }
633 }
634
635 if (!NT_STATUS_IS_OK(create_nt_user_token(&user_sid, &group_sid,
636 ngroups, group_sids, is_guest, &token))) {
637 SAFE_FREE(group_sids);
638 return NULL;
639 }
640
641 SAFE_FREE(group_sids);
642
643 return token;
644 }
645
646 /******************************************************************************
647 * this function returns the groups (SIDs) of the local SAM the user is in.
648 * If this samba server is a DC of the domain the user belongs to, it returns
649 * both domain groups and local / builtin groups. If the user is in a trusted
650 * domain, or samba is a member server of a domain, then this function returns
651 * local and builtin groups the user is a member of.
652 *
653 * currently this is a hack, as there is no sam implementation that is capable
654 * of groups.
655 ******************************************************************************/
656
657 static NTSTATUS get_user_groups_from_local_sam(SAM_ACCOUNT *sampass,
658 int *n_groups, DOM_SID **groups, gid_t **unix_groups)
659 {
660 uid_t uid;
661 gid_t gid;
662 int n_unix_groups;
663 int i;
664
665 *n_groups = 0;
666 *groups = NULL;
667
668 if (!sid_to_uid(pdb_get_user_sid(sampass), &uid) || !sid_to_gid(pdb_get_group_sid(sampass), &gid)) {
669 DEBUG(0, ("get_user_groups_from_local_sam: error fetching uid or gid for user!\n"));
670 return NT_STATUS_UNSUCCESSFUL;
671 }
672
673 n_unix_groups = groups_max();
674 if ((*unix_groups = malloc( sizeof(gid_t) * n_unix_groups ) ) == NULL) {
675 DEBUG(0, ("get_user_groups_from_local_sam: Out of memory allocating unix group list\n"));
676 return NT_STATUS_NO_MEMORY;
677 }
678
679 if (sys_getgrouplist(pdb_get_username(sampass), gid, *unix_groups, &n_unix_groups) == -1) {
680 gid_t *groups_tmp;
681 groups_tmp = Realloc(*unix_groups, sizeof(gid_t) * n_unix_groups);
682 if (!groups_tmp) {
683 SAFE_FREE(*unix_groups);
684 return NT_STATUS_NO_MEMORY;
685 }
686 *unix_groups = groups_tmp;
687
688 if (sys_getgrouplist(pdb_get_username(sampass), gid, *unix_groups, &n_unix_groups) == -1) {
689 DEBUG(0, ("get_user_groups_from_local_sam: failed to get the unix group list\n"));
690 SAFE_FREE(*unix_groups);
691 return NT_STATUS_NO_SUCH_USER; /* what should this return value be? */
692 }
693 }
694
695 debug_unix_user_token(DBGC_CLASS, 5, uid, gid, n_unix_groups, *unix_groups);
696
697 if (n_unix_groups > 0) {
698 *groups = malloc(sizeof(DOM_SID) * n_unix_groups);
699 if (!*groups) {
700 DEBUG(0, ("get_user_group_from_local_sam: malloc() failed for DOM_SID list!\n"));
701 SAFE_FREE(*unix_groups);
702 return NT_STATUS_NO_MEMORY;
703 }
704 }
705
706 *n_groups = n_unix_groups;
707
708 for (i = 0; i < *n_groups; i++) {
709 if (!gid_to_sid(&(*groups)[i], (*unix_groups)[i])) {
710 DEBUG(1, ("get_user_groups_from_local_sam: failed to convert gid %ld to a sid!\n", (long int)(*unix_groups)[i+1]));
711 SAFE_FREE(*groups);
712 SAFE_FREE(*unix_groups);
713 return NT_STATUS_NO_SUCH_USER;
714 }
715 }
716
717 return NT_STATUS_OK;
718 }
719
720 /***************************************************************************
721 Make a user_info struct
722 ***************************************************************************/
723
724 static NTSTATUS make_server_info(auth_serversupplied_info **server_info, SAM_ACCOUNT *sampass)
725 {
726 *server_info = malloc(sizeof(**server_info));
727 if (!*server_info) {
728 DEBUG(0,("make_server_info: malloc failed!\n"));
729 return NT_STATUS_NO_MEMORY;
730 }
731 ZERO_STRUCTP(*server_info);
732
733 (*server_info)->sam_fill_level = SAM_FILL_ALL;
734 (*server_info)->sam_account = sampass;
735 if (!sid_to_uid(pdb_get_user_sid(sampass), &((*server_info)->uid)))
736 return NT_STATUS_UNSUCCESSFUL;
737 if (!sid_to_gid(pdb_get_group_sid(sampass), &((*server_info)->gid)))
738 return NT_STATUS_UNSUCCESSFUL;
739
740 return NT_STATUS_OK;
741 }
742
743 /***************************************************************************
744 Make (and fill) a user_info struct from a SAM_ACCOUNT
745 ***************************************************************************/
746
747 NTSTATUS make_server_info_sam(auth_serversupplied_info **server_info,
748 SAM_ACCOUNT *sampass)
749 {
750 NTSTATUS nt_status = NT_STATUS_OK;
751 const DOM_SID *user_sid = pdb_get_user_sid(sampass);
752 const DOM_SID *group_sid = pdb_get_group_sid(sampass);
753 int n_groupSIDs = 0;
754 DOM_SID *groupSIDs = NULL;
755 gid_t *unix_groups = NULL;
756 NT_USER_TOKEN *token;
757 BOOL is_guest;
758 uint32 rid;
759
760 if (!NT_STATUS_IS_OK(nt_status = make_server_info(server_info, sampass))) {
761 return nt_status;
762 }
763
764 if (!NT_STATUS_IS_OK(nt_status
765 = get_user_groups_from_local_sam(sampass,
766 &n_groupSIDs, &groupSIDs, &unix_groups)))
767 {
768 DEBUG(4,("get_user_groups_from_local_sam failed\n"));
769 free_server_info(server_info);
770 return nt_status;
771 }
772
773 is_guest = (sid_peek_rid(user_sid, &rid) && rid == DOMAIN_USER_RID_GUEST);
774
775 if (!NT_STATUS_IS_OK(nt_status = create_nt_user_token(user_sid, group_sid,
776 n_groupSIDs, groupSIDs, is_guest,
777 &token)))
778 {
779 DEBUG(4,("create_nt_user_token failed\n"));
780 SAFE_FREE(groupSIDs);
781 SAFE_FREE(unix_groups);
782 free_server_info(server_info);
783 return nt_status;
784 }
785
786 SAFE_FREE(groupSIDs);
787
788 (*server_info)->n_groups = n_groupSIDs;
789 (*server_info)->groups = unix_groups;
790
791 (*server_info)->ptok = token;
792
793 DEBUG(5,("make_server_info_sam: made server info for user %s\n",
794 pdb_get_username((*server_info)->sam_account)));
795
796 return nt_status;
797 }
798
799 /***************************************************************************
800 Make (and fill) a user_info struct from a 'struct passwd' by conversion
801 to a SAM_ACCOUNT
802 ***************************************************************************/
803
804 NTSTATUS make_server_info_pw(auth_serversupplied_info **server_info, const struct passwd *pwd)
805 {
806 NTSTATUS nt_status;
807 SAM_ACCOUNT *sampass = NULL;
808 if (!NT_STATUS_IS_OK(nt_status = pdb_init_sam_pw(&sampass, pwd))) {
809 return nt_status;
810 }
811 return make_server_info_sam(server_info, sampass);
812 }
813
814 /***************************************************************************
815 Make (and fill) a user_info struct for a guest login.
816 ***************************************************************************/
817
818 NTSTATUS make_server_info_guest(auth_serversupplied_info **server_info)
819 {
820 NTSTATUS nt_status;
821 SAM_ACCOUNT *sampass = NULL;
822 DOM_SID guest_sid;
823
824 if (!NT_STATUS_IS_OK(nt_status = pdb_init_sam(&sampass))) {
825 return nt_status;
826 }
827
828 sid_copy(&guest_sid, get_global_sam_sid());
829 sid_append_rid(&guest_sid, DOMAIN_USER_RID_GUEST);
830
831 become_root();
832 if (!pdb_getsampwsid(sampass, &guest_sid)) {
833 unbecome_root();
834 return NT_STATUS_NO_SUCH_USER;
835 }
836 unbecome_root();
837
838 nt_status = make_server_info_sam(server_info, sampass);
839
840 if (NT_STATUS_IS_OK(nt_status)) {
841 (*server_info)->guest = True;
842 }
843
844 return nt_status;
845 }
846
847 /***************************************************************************
848 Make a server_info struct from the info3 returned by a domain logon
849 ***************************************************************************/
850
851 NTSTATUS make_server_info_info3(TALLOC_CTX *mem_ctx,
852 const char *internal_username,
853 const char *sent_nt_username,
854 const char *domain,
855 auth_serversupplied_info **server_info,
856 NET_USER_INFO_3 *info3)
857 {
858 NTSTATUS nt_status = NT_STATUS_OK;
859
860 const char *nt_domain;
861 const char *nt_username;
862
863 SAM_ACCOUNT *sam_account = NULL;
864 DOM_SID user_sid;
865 DOM_SID group_sid;
866
867 struct passwd *passwd;
868
869 unid_t u_id, g_id;
870 int u_type, g_type;
871
872 int n_lgroupSIDs;
873 DOM_SID *lgroupSIDs = NULL;
874
875 gid_t *unix_groups = NULL;
876 NT_USER_TOKEN *token;
877
878 DOM_SID *all_group_SIDs;
879 size_t i;
880
881 /*
882 Here is where we should check the list of
883 trusted domains, and verify that the SID
884 matches.
885 */
886
887 sid_copy(&user_sid, &info3->dom_sid.sid);
888 if (!sid_append_rid(&user_sid, info3->user_rid)) {
889 return NT_STATUS_INVALID_PARAMETER;
890 }
891
892 sid_copy(&group_sid, &info3->dom_sid.sid);
893 if (!sid_append_rid(&group_sid, info3->group_rid)) {
894 return NT_STATUS_INVALID_PARAMETER;
895 }
896
897 if (!(nt_username = unistr2_tdup(mem_ctx, &(info3->uni_user_name)))) {
898 /* If the server didn't give us one, just use the one we sent them */
899 nt_username = sent_nt_username;
900 }
901
902 if (!(nt_domain = unistr2_tdup(mem_ctx, &(info3->uni_logon_dom)))) {
903 /* If the server didn't give us one, just use the one we sent them */
904 domain = domain;
905 }
906
907 u_type = ID_USERID;
908 g_type = ID_GROUPID;
909 if (NT_STATUS_IS_OK(idmap_get_id_from_sid(&u_id, &u_type, &user_sid))
910 && NT_STATUS_IS_OK(idmap_get_id_from_sid(&g_id, &g_type, &group_sid))
911 && ((passwd = getpwuid_alloc(u_id.uid)))) {
912 nt_status = pdb_init_sam_pw(&sam_account, passwd);
913 passwd_free(&passwd);
914 } else {
915 char *dom_user;
916 dom_user = talloc_asprintf(mem_ctx, "%s%s%s",
917 nt_domain,
918 lp_winbind_separator(),
919 internal_username);
920
921 if (!dom_user) {
922 DEBUG(0, ("talloc_asprintf failed!\n"));
923 return NT_STATUS_NO_MEMORY;
924 } else {
925
926 if (!(passwd = Get_Pwnam(dom_user))
927 /* Only lookup local for the local
928 domain, we don't want this for
929 trusted domains */
930 && strequal(nt_domain, lp_workgroup())) {
931 passwd = Get_Pwnam(internal_username);
932 }
933
934 if (!passwd) {
935 return NT_STATUS_NO_SUCH_USER;
936 } else {
937 nt_status = pdb_init_sam_pw(&sam_account, passwd);
938 }
939 }
940 }
941
942 if (!NT_STATUS_IS_OK(nt_status)) {
943 DEBUG(0, ("make_server_info_info3: pdb_init_sam failed!\n"));
944 return nt_status;
945 }
946
947 if (!pdb_set_user_sid(sam_account, &user_sid, PDB_CHANGED)) {
948 pdb_free_sam(&sam_account);
949 return NT_STATUS_UNSUCCESSFUL;
950 }
951
952 if (!pdb_set_group_sid(sam_account, &group_sid, PDB_CHANGED)) {
953 pdb_free_sam(&sam_account);
954 return NT_STATUS_UNSUCCESSFUL;
955 }
956
957 if (!pdb_set_nt_username(sam_account, nt_username, PDB_CHANGED)) {
958 pdb_free_sam(&sam_account);
959 return NT_STATUS_NO_MEMORY;
960 }
961
962 if (!pdb_set_domain(sam_account, nt_domain, PDB_CHANGED)) {
963 pdb_free_sam(&sam_account);
964 return NT_STATUS_NO_MEMORY;
965 }
966
967 if (!pdb_set_fullname(sam_account, unistr2_static(&(info3->uni_full_name)), PDB_CHANGED)) {
968 pdb_free_sam(&sam_account);
969 return NT_STATUS_NO_MEMORY;
970 }
971
972 if (!pdb_set_logon_script(sam_account, unistr2_static(&(info3->uni_logon_script)), PDB_CHANGED)) {
973 pdb_free_sam(&sam_account);
974 return NT_STATUS_NO_MEMORY;
975 }
976
977 if (!pdb_set_profile_path(sam_account, unistr2_static(&(info3->uni_profile_path)), PDB_CHANGED)) {
978 pdb_free_sam(&sam_account);
979 return NT_STATUS_NO_MEMORY;
980 }
981
982 if (!pdb_set_homedir(sam_account, unistr2_static(&(info3->uni_home_dir)), PDB_CHANGED)) {
983 pdb_free_sam(&sam_account);
984 return NT_STATUS_NO_MEMORY;
985 }
986
987 if (!pdb_set_dir_drive(sam_account, unistr2_static(&(info3->uni_dir_drive)), PDB_CHANGED)) {
988 pdb_free_sam(&sam_account);
989 return NT_STATUS_NO_MEMORY;
990 }
991
992 if (!NT_STATUS_IS_OK(nt_status = make_server_info(server_info, sam_account))) {
993 DEBUG(4, ("make_server_info failed!\n"));
994 pdb_free_sam(&sam_account);
995 return nt_status;
996 }
997
998 /* Store the user group information in the server_info
999 returned to the caller. */
1000
1001 if (!NT_STATUS_IS_OK(nt_status
1002 = get_user_groups_from_local_sam(sam_account,
1003 &n_lgroupSIDs,
1004 &lgroupSIDs,
1005 &unix_groups)))
1006 {
1007 DEBUG(4,("get_user_groups_from_local_sam failed\n"));
1008 return nt_status;
1009 }
1010
1011 (*server_info)->groups = unix_groups;
1012 (*server_info)->n_groups = n_lgroupSIDs;
1013
1014 /* Create a 'combined' list of all SIDs we might want in the SD */
1015 all_group_SIDs = malloc(sizeof(DOM_SID) *
1016 (n_lgroupSIDs + info3->num_groups2 +
1017 info3->num_other_sids));
1018 if (!all_group_SIDs) {
1019 DEBUG(0, ("create_nt_token_info3: malloc() failed for DOM_SID list!\n"));
1020 SAFE_FREE(lgroupSIDs);
1021 return NT_STATUS_NO_MEMORY;
1022 }
1023
1024 /* Copy the 'local' sids */
1025 memcpy(all_group_SIDs, lgroupSIDs, sizeof(DOM_SID) * n_lgroupSIDs);
1026 SAFE_FREE(lgroupSIDs);
1027
1028 /* and create (by appending rids) the 'domain' sids */
1029 for (i = 0; i < info3->num_groups2; i++) {
1030 sid_copy(&all_group_SIDs[i+n_lgroupSIDs], &(info3->dom_sid.sid));
1031 if (!sid_append_rid(&all_group_SIDs[i+n_lgroupSIDs], info3->gids[i].g_rid)) {
1032 nt_status = NT_STATUS_INVALID_PARAMETER;
1033 DEBUG(3,("create_nt_token_info3: could not append additional group rid 0x%x\n",
1034 info3->gids[i].g_rid));
1035 SAFE_FREE(lgroupSIDs);
1036 return nt_status;
1037 }
1038 }
1039
1040 /* Copy 'other' sids. We need to do sid filtering here to
1041 prevent possible elevation of privileges. See:
1042
1043 http://www.microsoft.com/windows2000/techinfo/administration/security/sidfilter.asp
1044 */
1045
1046 for (i = 0; i < info3->num_other_sids; i++)
1047 sid_copy(&all_group_SIDs[
1048 n_lgroupSIDs + info3->num_groups2 + i],
1049 &info3->other_sids[i].sid);
1050
1051 /* Where are the 'global' sids... */
1052
1053 /* can the user be guest? if yes, where is it stored? */
1054 if (!NT_STATUS_IS_OK(
1055 nt_status = create_nt_user_token(
1056 &user_sid, &group_sid,
1057 n_lgroupSIDs + info3->num_groups2 + info3->num_other_sids,
1058 all_group_SIDs, False, &token))) {
1059 DEBUG(4,("create_nt_user_token failed\n"));
1060 SAFE_FREE(all_group_SIDs);
1061 return nt_status;
1062 }
1063
1064 (*server_info)->ptok = token;
1065
1066 SAFE_FREE(all_group_SIDs);
1067
1068 memcpy((*server_info)->session_key, info3->user_sess_key, sizeof((*server_info)->session_key)/* 16 */);
1069 memcpy((*server_info)->first_8_lm_hash, info3->padding, 8);
1070
1071 return NT_STATUS_OK;
1072 }
1073
1074 /***************************************************************************
1075 Free a user_info struct
1076 ***************************************************************************/
1077
1078 void free_user_info(auth_usersupplied_info **user_info)
1079 {
1080 DEBUG(5,("attempting to free (and zero) a user_info structure\n"));
1081 if (*user_info != NULL) {
1082 if ((*user_info)->smb_name.str) {
1083 DEBUG(10,("structure was created for %s\n", (*user_info)->smb_name.str));
1084 }
1085 SAFE_FREE((*user_info)->smb_name.str);
1086 SAFE_FREE((*user_info)->internal_username.str);
1087 SAFE_FREE((*user_info)->client_domain.str);
1088 SAFE_FREE((*user_info)->domain.str);
1089 SAFE_FREE((*user_info)->wksta_name.str);
1090 data_blob_free(&(*user_info)->lm_resp);
1091 data_blob_free(&(*user_info)->nt_resp);
1092 SAFE_FREE((*user_info)->interactive_password);
1093 data_blob_clear_free(&(*user_info)->plaintext_password);
1094 ZERO_STRUCT(**user_info);
1095 }
1096 SAFE_FREE(*user_info);
1097 }
1098
1099 /***************************************************************************
1100 Clear out a server_info struct that has been allocated
1101 ***************************************************************************/
1102
1103 void free_server_info(auth_serversupplied_info **server_info)
1104 {
1105 DEBUG(5,("attempting to free (and zero) a server_info structure\n"));
1106 if (*server_info != NULL) {
1107 pdb_free_sam(&(*server_info)->sam_account);
1108
1109 /* call pam_end here, unless we know we are keeping it */
1110 delete_nt_token( &(*server_info)->ptok );
1111 SAFE_FREE((*server_info)->groups);
1112 ZERO_STRUCT(**server_info);
1113 }
1114 SAFE_FREE(*server_info);
1115 }
1116
1117 /***************************************************************************
1118 Make an auth_methods struct
1119 ***************************************************************************/
1120
1121 BOOL make_auth_methods(struct auth_context *auth_context, auth_methods **auth_method)
1122 {
1123 if (!auth_context) {
1124 smb_panic("no auth_context supplied to make_auth_methods()!\n");
1125 }
1126
1127 if (!auth_method) {
1128 smb_panic("make_auth_methods: pointer to auth_method pointer is NULL!\n");
1129 }
1130
1131 *auth_method = talloc(auth_context->mem_ctx, sizeof(**auth_method));
1132 if (!*auth_method) {
1133 DEBUG(0,("make_auth_method: malloc failed!\n"));
1134 return False;
1135 }
1136 ZERO_STRUCTP(*auth_method);
1137
1138 return True;
1139 }
1140
1141 /****************************************************************************
1142 Delete a SID token.
1143 ****************************************************************************/
1144
1145 void delete_nt_token(NT_USER_TOKEN **pptoken)
1146 {
1147 if (*pptoken) {
1148 NT_USER_TOKEN *ptoken = *pptoken;
1149 SAFE_FREE( ptoken->user_sids );
1150 ZERO_STRUCTP(ptoken);
1151 }
1152 SAFE_FREE(*pptoken);
1153 }
1154
1155 /****************************************************************************
1156 Duplicate a SID token.
1157 ****************************************************************************/
1158
1159 NT_USER_TOKEN *dup_nt_token(NT_USER_TOKEN *ptoken)
1160 {
1161 NT_USER_TOKEN *token;
1162
1163 if (!ptoken)
1164 return NULL;
1165
1166 if ((token = (NT_USER_TOKEN *)malloc( sizeof(NT_USER_TOKEN) ) ) == NULL)
1167 return NULL;
1168
1169 ZERO_STRUCTP(token);
1170
1171 if ((token->user_sids = (DOM_SID *)memdup( ptoken->user_sids, sizeof(DOM_SID) * ptoken->num_sids )) == NULL) {
1172 SAFE_FREE(token);
1173 return NULL;
1174 }
1175
1176 token->num_sids = ptoken->num_sids;
1177
1178 return token;
1179 }
1180
1181 /**
1182 * Squash an NT_STATUS in line with security requirements.
1183 * In an attempt to avoid giving the whole game away when users
1184 * are authenticating, NT replaces both NT_STATUS_NO_SUCH_USER and
1185 * NT_STATUS_WRONG_PASSWORD with NT_STATUS_LOGON_FAILURE in certain situations
1186 * (session setups in particular).
1187 *
1188 * @param nt_status NTSTATUS input for squashing.
1189 * @return the 'squashed' nt_status
1190 **/
1191
1192 NTSTATUS nt_status_squash(NTSTATUS nt_status)
1193 {
1194 if NT_STATUS_IS_OK(nt_status) {
1195 return nt_status;
1196 } else if NT_STATUS_EQUAL(nt_status, NT_STATUS_NO_SUCH_USER) {
1197 /* Match WinXP and don't give the game away */
1198 return NT_STATUS_LOGON_FAILURE;
1199
1200 } else if NT_STATUS_EQUAL(nt_status, NT_STATUS_WRONG_PASSWORD) {
1201 /* Match WinXP and don't give the game away */
1202 return NT_STATUS_LOGON_FAILURE;
1203 } else {
1204 return nt_status;
1205 }
1206 }
1207
1208
1209
Samba GIT mirror