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must add one to the extra_data size to transfer the 0 string terminator.
[Samba/gebeck_regimport.git] / source3 / auth / auth_util.c
blobb14344ef50f4fe2103c1ea32d8a72271f300b886
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 pstring global_myname;
30 extern DOM_SID global_sid_World;
31 extern DOM_SID global_sid_Network;
32 extern DOM_SID global_sid_Builtin_Guests;
33 extern DOM_SID global_sid_Authenticated_Users;
34
35
36 /****************************************************************************
37 Create a UNIX user on demand.
38 ****************************************************************************/
39
40 static int smb_create_user(const char *unix_user, 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_user, sizeof(pstring));
49 if (homedir)
50 all_string_sub(add_script, "%H", homedir, sizeof(pstring));
51 ret = smbrun(add_script,NULL);
52 DEBUG(3,("smb_create_user: Running the command `%s' gave %d\n",add_script,ret));
53 return ret;
54 }
55
56 /****************************************************************************
57 Add and Delete UNIX users on demand, based on NTSTATUS codes.
58 ****************************************************************************/
59
60 void smb_user_control(const auth_usersupplied_info *user_info, auth_serversupplied_info *server_info, NTSTATUS nt_status)
61 {
62 struct passwd *pwd=NULL;
63
64 if (NT_STATUS_IS_OK(nt_status)) {
65
66 if (!(server_info->sam_fill_level & SAM_FILL_UNIX)) {
67
68 /*
69 * User validated ok against Domain controller.
70 * If the admin wants us to try and create a UNIX
71 * user on the fly, do so.
72 */
73
74 if(lp_adduser_script() && !(pwd = Get_Pwnam(user_info->internal_username.str))) {
75 smb_create_user(user_info->internal_username.str, NULL);
76 }
77 }
78 }
79 }
80
81 /****************************************************************************
82 Create an auth_usersupplied_data structure
83 ****************************************************************************/
84
85 static NTSTATUS make_user_info(auth_usersupplied_info **user_info,
86 const char *smb_name,
87 const char *internal_username,
88 const char *client_domain,
89 const char *domain,
90 const char *wksta_name,
91 DATA_BLOB lm_pwd, DATA_BLOB nt_pwd,
92 DATA_BLOB plaintext,
93 uint32 auth_flags, BOOL encrypted)
94 {
95
96 DEBUG(5,("attempting to make a user_info for %s (%s)\n", internal_username, smb_name));
97
98 *user_info = malloc(sizeof(**user_info));
99 if (!user_info) {
100 DEBUG(0,("malloc failed for user_info (size %d)\n", sizeof(*user_info)));
101 return NT_STATUS_NO_MEMORY;
102 }
103
104 ZERO_STRUCTP(*user_info);
105
106 DEBUG(5,("making strings for %s's user_info struct\n", internal_username));
107
108 (*user_info)->smb_name.str = strdup(smb_name);
109 if ((*user_info)->smb_name.str) {
110 (*user_info)->smb_name.len = strlen(smb_name);
111 } else {
112 free_user_info(user_info);
113 return NT_STATUS_NO_MEMORY;
114 }
115
116 (*user_info)->internal_username.str = strdup(internal_username);
117 if ((*user_info)->internal_username.str) {
118 (*user_info)->internal_username.len = strlen(internal_username);
119 } else {
120 free_user_info(user_info);
121 return NT_STATUS_NO_MEMORY;
122 }
123
124 (*user_info)->domain.str = strdup(domain);
125 if ((*user_info)->domain.str) {
126 (*user_info)->domain.len = strlen(domain);
127 } else {
128 free_user_info(user_info);
129 return NT_STATUS_NO_MEMORY;
130 }
131
132 (*user_info)->client_domain.str = strdup(client_domain);
133 if ((*user_info)->client_domain.str) {
134 (*user_info)->client_domain.len = strlen(client_domain);
135 } else {
136 free_user_info(user_info);
137 return NT_STATUS_NO_MEMORY;
138 }
139
140 (*user_info)->wksta_name.str = strdup(wksta_name);
141 if ((*user_info)->wksta_name.str) {
142 (*user_info)->wksta_name.len = strlen(wksta_name);
143 } else {
144 free_user_info(user_info);
145 return NT_STATUS_NO_MEMORY;
146 }
147
148 DEBUG(5,("making blobs for %s's user_info struct\n", internal_username));
149
150 (*user_info)->lm_resp = data_blob(lm_pwd.data, lm_pwd.length);
151 (*user_info)->nt_resp = data_blob(nt_pwd.data, nt_pwd.length);
152 (*user_info)->plaintext_password = data_blob(plaintext.data, plaintext.length);
153
154 (*user_info)->encrypted = encrypted;
155 (*user_info)->auth_flags = auth_flags;
156
157 DEBUG(10,("made an %sencrypted user_info for %s (%s)\n", encrypted ? "":"un" , internal_username, smb_name));
158
159 return NT_STATUS_OK;
160 }
161
162 /****************************************************************************
163 Create an auth_usersupplied_data structure after appropriate mapping.
164 ****************************************************************************/
165
166 NTSTATUS make_user_info_map(auth_usersupplied_info **user_info,
167 const char *smb_name,
168 const char *client_domain,
169 const char *wksta_name,
170 DATA_BLOB lm_pwd, DATA_BLOB nt_pwd,
171 DATA_BLOB plaintext,
172 uint32 ntlmssp_flags, BOOL encrypted)
173 {
174 const char *domain;
175 fstring internal_username;
176 fstrcpy(internal_username, smb_name);
177 map_username(internal_username);
178
179 DEBUG(5, ("make_user_info_map: Mapping user [%s]\\[%s] from workstation [%s]\n",
180 client_domain, smb_name, wksta_name));
181
182 if (lp_allow_trusted_domains() && *client_domain) {
183
184 /* the client could have given us a workstation name
185 or other crap for the workgroup - we really need a
186 way of telling if this domain name is one of our
187 trusted domain names
188
189 Also don't allow "" as a domain, fixes a Win9X bug
190 where it doens't supply a domain for logon script
191 'net use' commands.
192
193 The way I do it here is by checking if the fully
194 qualified username exists. This is rather reliant
195 on winbind, but until we have a better method this
196 will have to do
197 */
198
199 domain = client_domain;
200
201 if ((smb_name) && (*smb_name)) { /* Don't do this for guests */
202 char *user = NULL;
203 if (asprintf(&user, "%s%s%s",
204 client_domain, lp_winbind_separator(),
205 smb_name) < 0) {
206 DEBUG(0, ("make_user_info_map: asprintf() failed!\n"));
207 return NT_STATUS_NO_MEMORY;
208 }
209
210 DEBUG(5, ("make_user_info_map: testing for user %s\n", user));
211
212 if (Get_Pwnam(user) == NULL) {
213 DEBUG(5, ("make_user_info_map: test for user %s failed\n", user));
214 domain = lp_workgroup();
215 DEBUG(5, ("make_user_info_map: trusted domain %s doesn't appear to exist, using %s\n",
216 client_domain, domain));
217 } else {
218 DEBUG(5, ("make_user_info_map: using trusted domain %s\n", domain));
219 }
220 SAFE_FREE(user);
221 }
222 } else {
223 domain = lp_workgroup();
224 }
225
226 return make_user_info(user_info,
227 smb_name, internal_username,
228 client_domain, domain,
229 wksta_name,
230 lm_pwd, nt_pwd,
231 plaintext,
232 ntlmssp_flags, encrypted);
233
234 }
235
236 /****************************************************************************
237 Create an auth_usersupplied_data, making the DATA_BLOBs here.
238 Decrypt and encrypt the passwords.
239 ****************************************************************************/
240
241 BOOL make_user_info_netlogon_network(auth_usersupplied_info **user_info,
242 const char *smb_name,
243 const char *client_domain,
244 const char *wksta_name,
245 const uchar *lm_network_pwd, int lm_pwd_len,
246 const uchar *nt_network_pwd, int nt_pwd_len)
247 {
248 BOOL ret;
249 NTSTATUS nt_status;
250 DATA_BLOB lm_blob = data_blob(lm_network_pwd, lm_pwd_len);
251 DATA_BLOB nt_blob = data_blob(nt_network_pwd, nt_pwd_len);
252 DATA_BLOB plaintext_blob = data_blob(NULL, 0);
253 uint32 auth_flags = AUTH_FLAG_NONE;
254
255 if (lm_pwd_len)
256 auth_flags |= AUTH_FLAG_LM_RESP;
257 if (nt_pwd_len == 24) {
258 auth_flags |= AUTH_FLAG_NTLM_RESP;
259 } else if (nt_pwd_len != 0) {
260 auth_flags |= AUTH_FLAG_NTLMv2_RESP;
261 }
262
263 nt_status = make_user_info_map(user_info,
264 smb_name, client_domain,
265 wksta_name,
266 lm_blob, nt_blob,
267 plaintext_blob,
268 auth_flags, True);
269
270 ret = NT_STATUS_IS_OK(nt_status) ? True : False;
271
272 data_blob_free(&lm_blob);
273 data_blob_free(&nt_blob);
274 return ret;
275 }
276
277 /****************************************************************************
278 Create an auth_usersupplied_data, making the DATA_BLOBs here.
279 Decrypt and encrypt the passwords.
280 ****************************************************************************/
281
282 BOOL make_user_info_netlogon_interactive(auth_usersupplied_info **user_info,
283 const char *smb_name,
284 const char *client_domain,
285 const char *wksta_name,
286 const uchar chal[8],
287 const uchar lm_interactive_pwd[16],
288 const uchar nt_interactive_pwd[16],
289 const uchar *dc_sess_key)
290 {
291 char lm_pwd[16];
292 char nt_pwd[16];
293 unsigned char local_lm_response[24];
294 unsigned char local_nt_response[24];
295 unsigned char key[16];
296 uint32 auth_flags = AUTH_FLAG_NONE;
297
298 ZERO_STRUCT(key);
299 memcpy(key, dc_sess_key, 8);
300
301 if (lm_interactive_pwd) memcpy(lm_pwd, lm_interactive_pwd, sizeof(lm_pwd));
302 if (nt_interactive_pwd) memcpy(nt_pwd, nt_interactive_pwd, sizeof(nt_pwd));
303
304 #ifdef DEBUG_PASSWORD
305 DEBUG(100,("key:"));
306 dump_data(100, (char *)key, sizeof(key));
307
308 DEBUG(100,("lm owf password:"));
309 dump_data(100, lm_pwd, sizeof(lm_pwd));
310
311 DEBUG(100,("nt owf password:"));
312 dump_data(100, nt_pwd, sizeof(nt_pwd));
313 #endif
314
315 SamOEMhash((uchar *)lm_pwd, key, sizeof(lm_pwd));
316 SamOEMhash((uchar *)nt_pwd, key, sizeof(nt_pwd));
317
318 #ifdef DEBUG_PASSWORD
319 DEBUG(100,("decrypt of lm owf password:"));
320 dump_data(100, lm_pwd, sizeof(lm_pwd));
321
322 DEBUG(100,("decrypt of nt owf password:"));
323 dump_data(100, nt_pwd, sizeof(nt_pwd));
324 #endif
325
326 SMBOWFencrypt((const unsigned char *)lm_pwd, chal, local_lm_response);
327 SMBOWFencrypt((const unsigned char *)nt_pwd, chal, local_nt_response);
328
329 /* Password info paranoia */
330 ZERO_STRUCT(lm_pwd);
331 ZERO_STRUCT(nt_pwd);
332 ZERO_STRUCT(key);
333
334 {
335 BOOL ret;
336 NTSTATUS nt_status;
337 DATA_BLOB local_lm_blob = data_blob(local_lm_response, sizeof(local_lm_response));
338 DATA_BLOB local_nt_blob = data_blob(local_nt_response, sizeof(local_nt_response));
339 DATA_BLOB plaintext_blob = data_blob(NULL, 0);
340
341 if (lm_interactive_pwd)
342 auth_flags |= AUTH_FLAG_LM_RESP;
343 if (nt_interactive_pwd)
344 auth_flags |= AUTH_FLAG_NTLM_RESP;
345
346 nt_status = make_user_info_map(user_info,
347 smb_name, client_domain,
348 wksta_name,
349 local_lm_blob,
350 local_nt_blob,
351 plaintext_blob,
352 auth_flags, True);
353
354 ret = NT_STATUS_IS_OK(nt_status) ? True : False;
355 data_blob_free(&local_lm_blob);
356 data_blob_free(&local_nt_blob);
357 return ret;
358 }
359 }
360
361
362 /****************************************************************************
363 Create an auth_usersupplied_data structure
364 ****************************************************************************/
365
366 BOOL make_user_info_for_reply(auth_usersupplied_info **user_info,
367 const char *smb_name,
368 const char *client_domain,
369 const uint8 chal[8],
370 DATA_BLOB plaintext_password)
371 {
372
373 DATA_BLOB local_lm_blob;
374 DATA_BLOB local_nt_blob;
375 NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
376 uint32 auth_flags = AUTH_FLAG_NONE;
377
378 /*
379 * Not encrypted - do so.
380 */
381
382 DEBUG(5,("make_user_info_for_reply: User passwords not in encrypted format.\n"));
383
384 if (plaintext_password.data) {
385 unsigned char local_lm_response[24];
386
387 #ifdef DEBUG_PASSWORD
388 DEBUG(10,("Unencrypted password (len %d):\n",plaintext_password.length));
389 dump_data(100, plaintext_password.data, plaintext_password.length);
390 #endif
391
392 SMBencrypt( (const uchar *)plaintext_password.data, (const uchar*)chal, local_lm_response);
393 local_lm_blob = data_blob(local_lm_response, 24);
394
395 /* We can't do an NT hash here, as the password needs to be
396 case insensitive */
397 local_nt_blob = data_blob(NULL, 0);
398
399 auth_flags = (AUTH_FLAG_PLAINTEXT | AUTH_FLAG_LM_RESP);
400 } else {
401 local_lm_blob = data_blob(NULL, 0);
402 local_nt_blob = data_blob(NULL, 0);
403 }
404
405 ret = make_user_info_map(user_info, smb_name,
406 client_domain,
407 get_remote_machine_name(),
408 local_lm_blob,
409 local_nt_blob,
410 plaintext_password,
411 auth_flags, False);
412
413 data_blob_free(&local_lm_blob);
414 return NT_STATUS_IS_OK(ret) ? True : False;
415 }
416
417 /****************************************************************************
418 Create an auth_usersupplied_data structure
419 ****************************************************************************/
420
421 NTSTATUS make_user_info_for_reply_enc(auth_usersupplied_info **user_info,
422 const char *smb_name,
423 const char *client_domain,
424 DATA_BLOB lm_resp, DATA_BLOB nt_resp)
425 {
426 uint32 auth_flags = AUTH_FLAG_NONE;
427
428 DATA_BLOB no_plaintext_blob = data_blob(NULL, 0);
429
430 if (lm_resp.length == 24) {
431 auth_flags |= AUTH_FLAG_LM_RESP;
432 }
433 if (nt_resp.length == 0) {
434 } else if (nt_resp.length == 24) {
435 auth_flags |= AUTH_FLAG_NTLM_RESP;
436 } else {
437 auth_flags |= AUTH_FLAG_NTLMv2_RESP;
438 }
439
440 return make_user_info_map(user_info, smb_name,
441 client_domain,
442 get_remote_machine_name(),
443 lm_resp,
444 nt_resp,
445 no_plaintext_blob,
446 auth_flags, True);
447 }
448
449 /****************************************************************************
450 Create a guest user_info blob, for anonymous authenticaion.
451 ****************************************************************************/
452
453 BOOL make_user_info_guest(auth_usersupplied_info **user_info)
454 {
455 DATA_BLOB lm_blob = data_blob(NULL, 0);
456 DATA_BLOB nt_blob = data_blob(NULL, 0);
457 DATA_BLOB plaintext_blob = data_blob(NULL, 0);
458 uint32 auth_flags = AUTH_FLAG_NONE;
459 NTSTATUS nt_status;
460
461 nt_status = make_user_info(user_info,
462 "","",
463 "","",
464 "",
465 nt_blob, lm_blob,
466 plaintext_blob,
467 auth_flags, True);
468
469 return NT_STATUS_IS_OK(nt_status) ? True : False;
470 }
471
472 /****************************************************************************
473 prints a NT_USER_TOKEN to debug output.
474 ****************************************************************************/
475
476 void debug_nt_user_token(int dbg_class, int dbg_lev, NT_USER_TOKEN *token)
477 {
478 fstring sid_str;
479 int i;
480
481 if (!token) {
482 DEBUGC(dbg_class, dbg_lev, ("NT user token: (NULL)\n"));
483 return;
484 }
485
486 DEBUGC(dbg_class, dbg_lev, ("NT user token of user %s\n",
487 sid_to_string(sid_str, &token->user_sids[0]) ));
488 DEBUGADDC(dbg_class, dbg_lev, ("contains %i SIDs\n", token->num_sids));
489 for (i = 0; i < token->num_sids; i++)
490 DEBUGADDC(dbg_class, dbg_lev, ("SID[%3i]: %s\n", i,
491 sid_to_string(sid_str, &token->user_sids[i])));
492 }
493
494 /****************************************************************************
495 prints a UNIX 'token' to debug output.
496 ****************************************************************************/
497
498 void debug_unix_user_token(int dbg_class, int dbg_lev, uid_t uid, gid_t gid, int n_groups, gid_t *groups)
499 {
500 int i;
501 DEBUGC(dbg_class, dbg_lev, ("UNIX token of user %ld\n", (long int)uid));
502
503 DEBUGADDC(dbg_class, dbg_lev, ("Primary group is %ld and contains %i supplementary groups\n", (long int)gid, n_groups));
504 for (i = 0; i < n_groups; i++)
505 DEBUGADDC(dbg_class, dbg_lev, ("Group[%3i]: %ld\n", i,
506 (long int)groups[i]));
507 }
508
509 /****************************************************************************
510 Create the SID list for this user.
511 ****************************************************************************/
512
513 static NTSTATUS create_nt_user_token(const DOM_SID *user_sid, const DOM_SID *group_sid,
514 int n_groupSIDs, DOM_SID *groupSIDs,
515 BOOL is_guest, NT_USER_TOKEN **token)
516 {
517 NTSTATUS nt_status = NT_STATUS_OK;
518 NT_USER_TOKEN *ptoken;
519 int i;
520 int sid_ndx;
521
522 if ((ptoken = malloc( sizeof(NT_USER_TOKEN) ) ) == NULL) {
523 DEBUG(0, ("create_nt_token: Out of memory allocating token\n"));
524 nt_status = NT_STATUS_NO_MEMORY;
525 return nt_status;
526 }
527
528 ZERO_STRUCTP(ptoken);
529
530 ptoken->num_sids = n_groupSIDs + 5;
531
532 if ((ptoken->user_sids = (DOM_SID *)malloc( sizeof(DOM_SID) * ptoken->num_sids )) == NULL) {
533 DEBUG(0, ("create_nt_token: Out of memory allocating SIDs\n"));
534 nt_status = NT_STATUS_NO_MEMORY;
535 return nt_status;
536 }
537
538 memset((char*)ptoken->user_sids,0,sizeof(DOM_SID) * ptoken->num_sids);
539
540 /*
541 * Note - user SID *MUST* be first in token !
542 * se_access_check depends on this.
543 *
544 * Primary group SID is second in token. Convention.
545 */
546
547 sid_copy(&ptoken->user_sids[PRIMARY_USER_SID_INDEX], user_sid);
548 if (group_sid)
549 sid_copy(&ptoken->user_sids[PRIMARY_GROUP_SID_INDEX], group_sid);
550
551 /*
552 * Finally add the "standard" SIDs.
553 * The only difference between guest and "anonymous" (which we
554 * don't really support) is the addition of Authenticated_Users.
555 */
556
557 sid_copy(&ptoken->user_sids[2], &global_sid_World);
558 sid_copy(&ptoken->user_sids[3], &global_sid_Network);
559
560 if (is_guest)
561 sid_copy(&ptoken->user_sids[4], &global_sid_Builtin_Guests);
562 else
563 sid_copy(&ptoken->user_sids[4], &global_sid_Authenticated_Users);
564
565 sid_ndx = 5; /* next available spot */
566
567 for (i = 0; i < n_groupSIDs; i++) {
568 int check_sid_idx;
569 for (check_sid_idx = 1; check_sid_idx < ptoken->num_sids; check_sid_idx++) {
570 if (sid_equal(&ptoken->user_sids[check_sid_idx],
571 &groupSIDs[i])) {
572 break;
573 }
574 }
575
576 if (check_sid_idx >= ptoken->num_sids) /* Not found already */ {
577 sid_copy(&ptoken->user_sids[sid_ndx++], &groupSIDs[i]);
578 } else {
579 ptoken->num_sids--;
580 }
581 }
582
583 debug_nt_user_token(DBGC_AUTH, 10, ptoken);
584
585 *token = ptoken;
586
587 return nt_status;
588 }
589
590 /****************************************************************************
591 Create the SID list for this user.
592 ****************************************************************************/
593
594 NT_USER_TOKEN *create_nt_token(uid_t uid, gid_t gid, int ngroups, gid_t *groups, BOOL is_guest)
595 {
596 DOM_SID user_sid;
597 DOM_SID group_sid;
598 DOM_SID *group_sids;
599 NT_USER_TOKEN *token;
600 int i;
601
602 if (!uid_to_sid(&user_sid, uid)) {
603 return NULL;
604 }
605 if (!gid_to_sid(&group_sid, gid)) {
606 return NULL;
607 }
608
609 group_sids = malloc(sizeof(DOM_SID) * ngroups);
610 if (!group_sids) {
611 DEBUG(0, ("create_nt_token: malloc() failed for DOM_SID list!\n"));
612 return NULL;
613 }
614
615 for (i = 0; i < ngroups; i++) {
616 if (!gid_to_sid(&(group_sids)[i], (groups)[i])) {
617 DEBUG(1, ("create_nt_token: failed to convert gid %ld to a sid!\n", (long int)groups[i]));
618 SAFE_FREE(group_sids);
619 return NULL;
620 }
621 }
622
623 if (!NT_STATUS_IS_OK(create_nt_user_token(&user_sid, &group_sid,
624 ngroups, group_sids, is_guest, &token))) {
625 SAFE_FREE(group_sids);
626 return NULL;
627 }
628
629 SAFE_FREE(group_sids);
630
631 return token;
632 }
633
634 /******************************************************************************
635 * this function returns the groups (SIDs) of the local SAM the user is in.
636 * If this samba server is a DC of the domain the user belongs to, it returns
637 * both domain groups and local / builtin groups. If the user is in a trusted
638 * domain, or samba is a member server of a domain, then this function returns
639 * local and builtin groups the user is a member of.
640 *
641 * currently this is a hack, as there is no sam implementation that is capable
642 * of groups.
643 ******************************************************************************/
644
645 static NTSTATUS get_user_groups_from_local_sam(const DOM_SID *user_sid,
646 int *n_groups, DOM_SID **groups, gid_t **unix_groups)
647 {
648 uid_t uid;
649 enum SID_NAME_USE snu;
650 fstring str;
651 int n_unix_groups;
652 int i;
653 struct passwd *usr;
654
655 *n_groups = 0;
656 *groups = NULL;
657
658 if (!sid_to_uid(user_sid, &uid, &snu)) {
659 DEBUG(2, ("get_user_groups_from_local_sam: Failed to convert user SID %s to a uid!\n",
660 sid_to_string(str, user_sid)));
661 /* This might be a non-unix account */
662 return NT_STATUS_OK;
663 }
664
665 /*
666 * This is _essential_ to prevent occasional segfaults when
667 * winbind can't find uid -> username mapping
668 */
669 if (!(usr = getpwuid_alloc(uid))) {
670 DEBUG(0, ("Couldn't find passdb structure for UID = %d ! Aborting.\n", uid));
671 return NT_STATUS_NO_SUCH_USER;
672 };
673
674 n_unix_groups = groups_max();
675 if ((*unix_groups = malloc( sizeof(gid_t) * groups_max() ) ) == NULL) {
676 DEBUG(0, ("get_user_groups_from_local_sam: Out of memory allocating unix group list\n"));
677 passwd_free(&usr);
678 return NT_STATUS_NO_MEMORY;
679 }
680
681 if (sys_getgrouplist(usr->pw_name, usr->pw_gid, *unix_groups, &n_unix_groups) == -1) {
682 *unix_groups = Realloc(unix_groups, sizeof(gid_t) * n_unix_groups);
683 if (sys_getgrouplist(usr->pw_name, usr->pw_gid, *unix_groups, &n_unix_groups) == -1) {
684 DEBUG(0, ("get_user_groups_from_local_sam: failed to get the unix group list\n"));
685 SAFE_FREE(unix_groups);
686 passwd_free(&usr);
687 return NT_STATUS_NO_SUCH_USER; /* what should this return value be? */
688 }
689 }
690
691 debug_unix_user_token(DBGC_CLASS, 5, usr->pw_uid, usr->pw_gid, n_unix_groups, *unix_groups);
692
693 passwd_free(&usr);
694
695 if (n_unix_groups > 0) {
696 *groups = malloc(sizeof(DOM_SID) * n_unix_groups);
697 if (!*groups) {
698 DEBUG(0, ("get_user_group_from_local_sam: malloc() failed for DOM_SID list!\n"));
699 SAFE_FREE(unix_groups);
700 return NT_STATUS_NO_MEMORY;
701 }
702 }
703
704 *n_groups = n_unix_groups;
705
706 for (i = 0; i < *n_groups; i++) {
707 if (!gid_to_sid(&(*groups)[i], (*unix_groups)[i])) {
708 DEBUG(1, ("get_user_groups_from_local_sam: failed to convert gid %ld to a sid!\n", (long int)unix_groups[i+1]));
709 SAFE_FREE(groups);
710 SAFE_FREE(unix_groups);
711 return NT_STATUS_NO_SUCH_USER;
712 }
713 }
714
715 return NT_STATUS_OK;
716 }
717
718 /***************************************************************************
719 Make a user_info struct
720 ***************************************************************************/
721
722 static NTSTATUS make_server_info(auth_serversupplied_info **server_info, SAM_ACCOUNT *sampass)
723 {
724 *server_info = malloc(sizeof(**server_info));
725 if (!*server_info) {
726 DEBUG(0,("make_server_info: malloc failed!\n"));
727 return NT_STATUS_NO_MEMORY;
728 }
729 ZERO_STRUCTP(*server_info);
730
731 (*server_info)->sam_fill_level = SAM_FILL_ALL;
732 (*server_info)->sam_account = sampass;
733
734 return NT_STATUS_OK;
735 }
736
737 /***************************************************************************
738 Make (and fill) a user_info struct from a SAM_ACCOUNT
739 ***************************************************************************/
740
741 NTSTATUS make_server_info_sam(auth_serversupplied_info **server_info,
742 SAM_ACCOUNT *sampass)
743 {
744 NTSTATUS nt_status = NT_STATUS_OK;
745 const DOM_SID *user_sid = pdb_get_user_sid(sampass);
746 const DOM_SID *group_sid = pdb_get_group_sid(sampass);
747 int n_groupSIDs = 0;
748 DOM_SID *groupSIDs = NULL;
749 gid_t *unix_groups = NULL;
750 NT_USER_TOKEN *token;
751 BOOL is_guest;
752 uint32 rid;
753
754 if (!NT_STATUS_IS_OK(nt_status = make_server_info(server_info, sampass))) {
755 return nt_status;
756 }
757
758 if (!NT_STATUS_IS_OK(nt_status
759 = get_user_groups_from_local_sam(pdb_get_user_sid(sampass),
760 &n_groupSIDs, &groupSIDs, &unix_groups)))
761 {
762 DEBUG(4,("get_user_groups_from_local_sam failed\n"));
763 free_server_info(server_info);
764 return nt_status;
765 }
766
767 is_guest = (sid_peek_rid(user_sid, &rid) && rid == DOMAIN_USER_RID_GUEST);
768
769 if (!NT_STATUS_IS_OK(nt_status = create_nt_user_token(user_sid, group_sid,
770 n_groupSIDs, groupSIDs, is_guest,
771 &token)))
772 {
773 DEBUG(4,("create_nt_user_token failed\n"));
774 SAFE_FREE(groupSIDs);
775 SAFE_FREE(unix_groups);
776 free_server_info(server_info);
777 return nt_status;
778 }
779
780 SAFE_FREE(groupSIDs);
781
782 (*server_info)->n_groups = n_groupSIDs;
783 (*server_info)->groups = unix_groups;
784
785 (*server_info)->ptok = token;
786
787 DEBUG(5,("make_server_info_sam: made server info for user %s\n",
788 pdb_get_username((*server_info)->sam_account)));
789
790 return nt_status;
791 }
792
793 /***************************************************************************
794 Make (and fill) a user_info struct from a 'struct passwd' by conversion
795 to a SAM_ACCOUNT
796 ***************************************************************************/
797
798 NTSTATUS make_server_info_pw(auth_serversupplied_info **server_info, const struct passwd *pwd)
799 {
800 NTSTATUS nt_status;
801 SAM_ACCOUNT *sampass = NULL;
802 if (!NT_STATUS_IS_OK(nt_status = pdb_init_sam_pw(&sampass, pwd))) {
803 return nt_status;
804 }
805 return make_server_info_sam(server_info, sampass);
806 }
807
808 /***************************************************************************
809 Make (and fill) a user_info struct for a guest login.
810 ***************************************************************************/
811
812 NTSTATUS make_server_info_guest(auth_serversupplied_info **server_info)
813 {
814 NTSTATUS nt_status;
815 SAM_ACCOUNT *sampass = NULL;
816 DOM_SID guest_sid;
817
818 if (!NT_STATUS_IS_OK(nt_status = pdb_init_sam(&sampass))) {
819 return nt_status;
820 }
821
822 sid_copy(&guest_sid, get_global_sam_sid());
823 sid_append_rid(&guest_sid, DOMAIN_USER_RID_GUEST);
824
825 if (!pdb_getsampwsid(sampass, &guest_sid)) {
826 return NT_STATUS_NO_SUCH_USER;
827 }
828
829 nt_status = make_server_info_sam(server_info, sampass);
830
831 (*server_info)->guest = True;
832
833 return nt_status;
834 }
835
836 /***************************************************************************
837 Make a server_info struct from the info3 returned by a domain logon
838 ***************************************************************************/
839
840 NTSTATUS make_server_info_info3(TALLOC_CTX *mem_ctx,
841 const char *internal_username,
842 const char *sent_nt_username,
843 const char *domain,
844 auth_serversupplied_info **server_info,
845 NET_USER_INFO_3 *info3)
846 {
847 NTSTATUS nt_status = NT_STATUS_OK;
848
849 const char *nt_domain;
850 const char *nt_username;
851
852 SAM_ACCOUNT *sam_account = NULL;
853 DOM_SID user_sid;
854 DOM_SID group_sid;
855
856 struct passwd *passwd;
857
858 uid_t uid;
859 gid_t gid;
860
861 int n_lgroupSIDs;
862 DOM_SID *lgroupSIDs = NULL;
863
864 gid_t *unix_groups = NULL;
865 NT_USER_TOKEN *token;
866
867 DOM_SID *all_group_SIDs;
868 int i;
869
870 /*
871 Here is where we should check the list of
872 trusted domains, and verify that the SID
873 matches.
874 */
875
876 sid_copy(&user_sid, &info3->dom_sid.sid);
877 if (!sid_append_rid(&user_sid, info3->user_rid)) {
878 return NT_STATUS_INVALID_PARAMETER;
879 }
880
881 sid_copy(&group_sid, &info3->dom_sid.sid);
882 if (!sid_append_rid(&group_sid, info3->group_rid)) {
883 return NT_STATUS_INVALID_PARAMETER;
884 }
885
886 if (!(nt_username = unistr2_tdup(mem_ctx, &(info3->uni_user_name)))) {
887 /* If the server didn't give us one, just use the one we sent them */
888 nt_username = sent_nt_username;
889 }
890
891 if (!(nt_domain = unistr2_tdup(mem_ctx, &(info3->uni_logon_dom)))) {
892 /* If the server didn't give us one, just use the one we sent them */
893 domain = domain;
894 }
895
896 if (winbind_sid_to_uid(&uid, &user_sid)
897 && winbind_sid_to_gid(&gid, &group_sid)
898 && ((passwd = getpwuid_alloc(uid)))) {
899 nt_status = pdb_init_sam_pw(&sam_account, passwd);
900 passwd_free(&passwd);
901 } else {
902 char *dom_user;
903 dom_user = talloc_asprintf(mem_ctx, "%s%s%s",
904 nt_domain,
905 lp_winbind_separator(),
906 internal_username);
907
908 if (!dom_user) {
909 DEBUG(0, ("talloc_asprintf failed!\n"));
910 return NT_STATUS_NO_MEMORY;
911 } else {
912
913 if (!(passwd = Get_Pwnam(dom_user))
914 /* Only lookup local for the local
915 domain, we don't want this for
916 trusted domains */
917 && strequal(nt_domain, lp_workgroup())) {
918 passwd = Get_Pwnam(internal_username);
919 }
920
921 if (!passwd) {
922 return NT_STATUS_NO_SUCH_USER;
923 } else {
924 nt_status = pdb_init_sam_pw(&sam_account, passwd);
925 }
926 }
927 }
928
929 if (!NT_STATUS_IS_OK(nt_status)) {
930 DEBUG(0, ("make_server_info_info3: pdb_init_sam failed!\n"));
931 return nt_status;
932 }
933
934 if (!pdb_set_user_sid(sam_account, &user_sid, PDB_CHANGED)) {
935 pdb_free_sam(&sam_account);
936 return NT_STATUS_UNSUCCESSFUL;
937 }
938
939 if (!pdb_set_group_sid(sam_account, &group_sid, PDB_CHANGED)) {
940 pdb_free_sam(&sam_account);
941 return NT_STATUS_UNSUCCESSFUL;
942 }
943
944 if (!pdb_set_nt_username(sam_account, nt_username, PDB_CHANGED)) {
945 pdb_free_sam(&sam_account);
946 return NT_STATUS_NO_MEMORY;
947 }
948
949 if (!pdb_set_domain(sam_account, nt_domain, PDB_CHANGED)) {
950 pdb_free_sam(&sam_account);
951 return NT_STATUS_NO_MEMORY;
952 }
953
954 if (!pdb_set_fullname(sam_account, pdb_unistr2_convert(&(info3->uni_full_name)), PDB_CHANGED)) {
955 pdb_free_sam(&sam_account);
956 return NT_STATUS_NO_MEMORY;
957 }
958
959 if (!pdb_set_logon_script(sam_account, pdb_unistr2_convert(&(info3->uni_logon_script)), PDB_CHANGED)) {
960 pdb_free_sam(&sam_account);
961 return NT_STATUS_NO_MEMORY;
962 }
963
964 if (!pdb_set_profile_path(sam_account, pdb_unistr2_convert(&(info3->uni_profile_path)), PDB_CHANGED)) {
965 pdb_free_sam(&sam_account);
966 return NT_STATUS_NO_MEMORY;
967 }
968
969 if (!pdb_set_homedir(sam_account, pdb_unistr2_convert(&(info3->uni_home_dir)), PDB_CHANGED)) {
970 pdb_free_sam(&sam_account);
971 return NT_STATUS_NO_MEMORY;
972 }
973
974 if (!pdb_set_dir_drive(sam_account, pdb_unistr2_convert(&(info3->uni_dir_drive)), PDB_CHANGED)) {
975 pdb_free_sam(&sam_account);
976 return NT_STATUS_NO_MEMORY;
977 }
978
979 if (!NT_STATUS_IS_OK(nt_status = make_server_info(server_info, sam_account))) {
980 DEBUG(4, ("make_server_info failed!\n"));
981 pdb_free_sam(&sam_account);
982 return nt_status;
983 }
984
985 /* Store the user group information in the server_info
986 returned to the caller. */
987
988 if (!NT_STATUS_IS_OK(nt_status
989 = get_user_groups_from_local_sam(&user_sid,
990 &n_lgroupSIDs,
991 &lgroupSIDs,
992 &unix_groups)))
993 {
994 DEBUG(4,("get_user_groups_from_local_sam failed\n"));
995 return nt_status;
996 }
997
998 (*server_info)->groups = unix_groups;
999 (*server_info)->n_groups = n_lgroupSIDs;
1000
1001 /* Create a 'combined' list of all SIDs we might want in the SD */
1002 all_group_SIDs = malloc(sizeof(DOM_SID) *
1003 (n_lgroupSIDs + info3->num_groups2 +
1004 info3->num_other_sids));
1005 if (!all_group_SIDs) {
1006 DEBUG(0, ("create_nt_token_info3: malloc() failed for DOM_SID list!\n"));
1007 SAFE_FREE(lgroupSIDs);
1008 return NT_STATUS_NO_MEMORY;
1009 }
1010
1011 /* Copy the 'local' sids */
1012 memcpy(all_group_SIDs, lgroupSIDs, sizeof(DOM_SID) * n_lgroupSIDs);
1013 SAFE_FREE(lgroupSIDs);
1014
1015 /* and create (by appending rids) the 'domain' sids */
1016 for (i = 0; i < info3->num_groups2; i++) {
1017 sid_copy(&all_group_SIDs[i+n_lgroupSIDs], &(info3->dom_sid.sid));
1018 if (!sid_append_rid(&all_group_SIDs[i+n_lgroupSIDs], info3->gids[i].g_rid)) {
1019 nt_status = NT_STATUS_INVALID_PARAMETER;
1020 DEBUG(3,("create_nt_token_info3: could not append additional group rid 0x%x\n",
1021 info3->gids[i].g_rid));
1022 SAFE_FREE(lgroupSIDs);
1023 return nt_status;
1024 }
1025 }
1026
1027 /* Copy 'other' sids. We need to do sid filtering here to
1028 prevent possible elevation of privileges. See:
1029
1030 http://www.microsoft.com/windows2000/techinfo/administration/security/sidfilter.asp
1031 */
1032
1033 for (i = 0; i < info3->num_other_sids; i++)
1034 sid_copy(&all_group_SIDs[
1035 n_lgroupSIDs + info3->num_groups2 + i],
1036 &info3->other_sids[i].sid);
1037
1038 /* Where are the 'global' sids... */
1039
1040 /* can the user be guest? if yes, where is it stored? */
1041 if (!NT_STATUS_IS_OK(
1042 nt_status = create_nt_user_token(
1043 &user_sid, &group_sid,
1044 n_lgroupSIDs + info3->num_groups2 + info3->num_other_sids,
1045 all_group_SIDs, False, &token))) {
1046 DEBUG(4,("create_nt_user_token failed\n"));
1047 SAFE_FREE(all_group_SIDs);
1048 return nt_status;
1049 }
1050
1051 (*server_info)->ptok = token;
1052
1053 SAFE_FREE(all_group_SIDs);
1054
1055 return NT_STATUS_OK;
1056 }
1057
1058 /***************************************************************************
1059 Free a user_info struct
1060 ***************************************************************************/
1061
1062 void free_user_info(auth_usersupplied_info **user_info)
1063 {
1064 DEBUG(5,("attempting to free (and zero) a user_info structure\n"));
1065 if (*user_info != NULL) {
1066 if ((*user_info)->smb_name.str) {
1067 DEBUG(10,("structure was created for %s\n", (*user_info)->smb_name.str));
1068 }
1069 SAFE_FREE((*user_info)->smb_name.str);
1070 SAFE_FREE((*user_info)->internal_username.str);
1071 SAFE_FREE((*user_info)->client_domain.str);
1072 SAFE_FREE((*user_info)->domain.str);
1073 SAFE_FREE((*user_info)->wksta_name.str);
1074 data_blob_free(&(*user_info)->lm_resp);
1075 data_blob_free(&(*user_info)->nt_resp);
1076 SAFE_FREE((*user_info)->interactive_password);
1077 data_blob_clear_free(&(*user_info)->plaintext_password);
1078 ZERO_STRUCT(**user_info);
1079 }
1080 SAFE_FREE(*user_info);
1081 }
1082
1083 /***************************************************************************
1084 Clear out a server_info struct that has been allocated
1085 ***************************************************************************/
1086
1087 void free_server_info(auth_serversupplied_info **server_info)
1088 {
1089 DEBUG(5,("attempting to free (and zero) a server_info structure\n"));
1090 if (*server_info != NULL) {
1091 pdb_free_sam(&(*server_info)->sam_account);
1092
1093 /* call pam_end here, unless we know we are keeping it */
1094 delete_nt_token( &(*server_info)->ptok );
1095 SAFE_FREE((*server_info)->groups);
1096 ZERO_STRUCT(**server_info);
1097 }
1098 SAFE_FREE(*server_info);
1099 }
1100
1101 /***************************************************************************
1102 Make an auth_methods struct
1103 ***************************************************************************/
1104
1105 BOOL make_auth_methods(struct auth_context *auth_context, auth_methods **auth_method)
1106 {
1107 if (!auth_context) {
1108 smb_panic("no auth_context supplied to make_auth_methods()!\n");
1109 }
1110
1111 if (!auth_method) {
1112 smb_panic("make_auth_methods: pointer to auth_method pointer is NULL!\n");
1113 }
1114
1115 *auth_method = talloc(auth_context->mem_ctx, sizeof(**auth_method));
1116 if (!*auth_method) {
1117 DEBUG(0,("make_auth_method: malloc failed!\n"));
1118 return False;
1119 }
1120 ZERO_STRUCTP(*auth_method);
1121
1122 return True;
1123 }
1124
1125 /****************************************************************************
1126 Delete a SID token.
1127 ****************************************************************************/
1128
1129 void delete_nt_token(NT_USER_TOKEN **pptoken)
1130 {
1131 if (*pptoken) {
1132 NT_USER_TOKEN *ptoken = *pptoken;
1133 SAFE_FREE( ptoken->user_sids );
1134 ZERO_STRUCTP(ptoken);
1135 }
1136 SAFE_FREE(*pptoken);
1137 }
1138
1139 /****************************************************************************
1140 Duplicate a SID token.
1141 ****************************************************************************/
1142
1143 NT_USER_TOKEN *dup_nt_token(NT_USER_TOKEN *ptoken)
1144 {
1145 NT_USER_TOKEN *token;
1146
1147 if (!ptoken)
1148 return NULL;
1149
1150 if ((token = (NT_USER_TOKEN *)malloc( sizeof(NT_USER_TOKEN) ) ) == NULL)
1151 return NULL;
1152
1153 ZERO_STRUCTP(token);
1154
1155 if ((token->user_sids = (DOM_SID *)memdup( ptoken->user_sids, sizeof(DOM_SID) * ptoken->num_sids )) == NULL) {
1156 SAFE_FREE(token);
1157 return NULL;
1158 }
1159
1160 token->num_sids = ptoken->num_sids;
1161
1162 return token;
1163 }
1164
1165 /**
1166 * Squash an NT_STATUS in line with security requirements.
1167 * In an attempt to avoid giving the whole game away when users
1168 * are authenticating, NT replaces both NT_STATUS_NO_SUCH_USER and
1169 * NT_STATUS_WRONG_PASSWORD with NT_STATUS_LOGON_FAILURE in certain situations
1170 * (session setups in particular).
1171 *
1172 * @param nt_status NTSTATUS input for squashing.
1173 * @return the 'squashed' nt_status
1174 **/
1175
1176 NTSTATUS nt_status_squash(NTSTATUS nt_status)
1177 {
1178 if NT_STATUS_IS_OK(nt_status) {
1179 return nt_status;
1180 } else if NT_STATUS_EQUAL(nt_status, NT_STATUS_NO_SUCH_USER) {
1181 /* Match WinXP and don't give the game away */
1182 return NT_STATUS_LOGON_FAILURE;
1183
1184 } else if NT_STATUS_EQUAL(nt_status, NT_STATUS_WRONG_PASSWORD) {
1185 /* Match WinXP and don't give the game away */
1186 return NT_STATUS_LOGON_FAILURE;
1187 } else {
1188 return nt_status;
1189 }
1190 }
1191
1192
1193
reg import