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performance patch from HP-UX folks (cant remember who)
[Samba.git] / source / auth / auth_util.c
blob5fdfd0694a1610c2f05c283bdfc33cc84663650f
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 an auth_usersupplied_data structure
82 ****************************************************************************/
83
84 static NTSTATUS make_user_info(auth_usersupplied_info **user_info,
85 const char *smb_name,
86 const char *internal_username,
87 const char *client_domain,
88 const char *domain,
89 const char *wksta_name,
90 DATA_BLOB lm_pwd, DATA_BLOB nt_pwd,
91 DATA_BLOB plaintext,
92 uint32 auth_flags, BOOL encrypted)
93 {
94
95 DEBUG(5,("attempting to make a user_info for %s (%s)\n", internal_username, smb_name));
96
97 *user_info = malloc(sizeof(**user_info));
98 if (!user_info) {
99 DEBUG(0,("malloc failed for user_info (size %d)\n", sizeof(*user_info)));
100 return NT_STATUS_NO_MEMORY;
101 }
102
103 ZERO_STRUCTP(*user_info);
104
105 DEBUG(5,("making strings for %s's user_info struct\n", internal_username));
106
107 (*user_info)->smb_name.str = strdup(smb_name);
108 if ((*user_info)->smb_name.str) {
109 (*user_info)->smb_name.len = strlen(smb_name);
110 } else {
111 free_user_info(user_info);
112 return NT_STATUS_NO_MEMORY;
113 }
114
115 (*user_info)->internal_username.str = strdup(internal_username);
116 if ((*user_info)->internal_username.str) {
117 (*user_info)->internal_username.len = strlen(internal_username);
118 } else {
119 free_user_info(user_info);
120 return NT_STATUS_NO_MEMORY;
121 }
122
123 (*user_info)->domain.str = strdup(domain);
124 if ((*user_info)->domain.str) {
125 (*user_info)->domain.len = strlen(domain);
126 } else {
127 free_user_info(user_info);
128 return NT_STATUS_NO_MEMORY;
129 }
130
131 (*user_info)->client_domain.str = strdup(client_domain);
132 if ((*user_info)->client_domain.str) {
133 (*user_info)->client_domain.len = strlen(client_domain);
134 } else {
135 free_user_info(user_info);
136 return NT_STATUS_NO_MEMORY;
137 }
138
139 (*user_info)->wksta_name.str = strdup(wksta_name);
140 if ((*user_info)->wksta_name.str) {
141 (*user_info)->wksta_name.len = strlen(wksta_name);
142 } else {
143 free_user_info(user_info);
144 return NT_STATUS_NO_MEMORY;
145 }
146
147 DEBUG(5,("making blobs for %s's user_info struct\n", internal_username));
148
149 (*user_info)->lm_resp = data_blob(lm_pwd.data, lm_pwd.length);
150 (*user_info)->nt_resp = data_blob(nt_pwd.data, nt_pwd.length);
151 (*user_info)->plaintext_password = data_blob(plaintext.data, plaintext.length);
152
153 (*user_info)->encrypted = encrypted;
154 (*user_info)->auth_flags = auth_flags;
155
156 DEBUG(10,("made an %sencrypted user_info for %s (%s)\n", encrypted ? "":"un" , internal_username, smb_name));
157
158 return NT_STATUS_OK;
159 }
160
161 /****************************************************************************
162 Create an auth_usersupplied_data structure after appropriate mapping.
163 ****************************************************************************/
164
165 NTSTATUS make_user_info_map(auth_usersupplied_info **user_info,
166 const char *smb_name,
167 const char *client_domain,
168 const char *wksta_name,
169 DATA_BLOB lm_pwd, DATA_BLOB nt_pwd,
170 DATA_BLOB plaintext,
171 uint32 ntlmssp_flags, BOOL encrypted)
172 {
173 const char *domain;
174 fstring internal_username;
175 fstrcpy(internal_username, smb_name);
176 map_username(internal_username);
177
178 DEBUG(5, ("make_user_info_map: Mapping user [%s]\\[%s] from workstation [%s]\n",
179 client_domain, smb_name, wksta_name));
180
181 if (lp_allow_trusted_domains() && *client_domain) {
182
183 /* the client could have given us a workstation name
184 or other crap for the workgroup - we really need a
185 way of telling if this domain name is one of our
186 trusted domain names
187
188 Also don't allow "" as a domain, fixes a Win9X bug
189 where it doens't supply a domain for logon script
190 'net use' commands.
191
192 The way I do it here is by checking if the fully
193 qualified username exists. This is rather reliant
194 on winbind, but until we have a better method this
195 will have to do
196 */
197
198 domain = client_domain;
199
200 if ((smb_name) && (*smb_name)) { /* Don't do this for guests */
201 char *user = NULL;
202 if (asprintf(&user, "%s%s%s",
203 client_domain, lp_winbind_separator(),
204 smb_name) < 0) {
205 DEBUG(0, ("make_user_info_map: asprintf() failed!\n"));
206 return NT_STATUS_NO_MEMORY;
207 }
208
209 DEBUG(5, ("make_user_info_map: testing for user %s\n", user));
210
211 if (Get_Pwnam(user) == NULL) {
212 DEBUG(5, ("make_user_info_map: test for user %s failed\n", user));
213 domain = lp_workgroup();
214 DEBUG(5, ("make_user_info_map: trusted domain %s doesn't appear to exist, using %s\n",
215 client_domain, domain));
216 } else {
217 DEBUG(5, ("make_user_info_map: using trusted domain %s\n", domain));
218 }
219 SAFE_FREE(user);
220 }
221 } else {
222 domain = lp_workgroup();
223 }
224
225 return make_user_info(user_info,
226 smb_name, internal_username,
227 client_domain, domain,
228 wksta_name,
229 lm_pwd, nt_pwd,
230 plaintext,
231 ntlmssp_flags, encrypted);
232
233 }
234
235 /****************************************************************************
236 Create an auth_usersupplied_data, making the DATA_BLOBs here.
237 Decrypt and encrypt the passwords.
238 ****************************************************************************/
239
240 BOOL make_user_info_netlogon_network(auth_usersupplied_info **user_info,
241 const char *smb_name,
242 const char *client_domain,
243 const char *wksta_name,
244 const uchar *lm_network_pwd, int lm_pwd_len,
245 const uchar *nt_network_pwd, int nt_pwd_len)
246 {
247 BOOL ret;
248 NTSTATUS nt_status;
249 DATA_BLOB lm_blob = data_blob(lm_network_pwd, lm_pwd_len);
250 DATA_BLOB nt_blob = data_blob(nt_network_pwd, nt_pwd_len);
251 DATA_BLOB plaintext_blob = data_blob(NULL, 0);
252 uint32 auth_flags = AUTH_FLAG_NONE;
253
254 if (lm_pwd_len)
255 auth_flags |= AUTH_FLAG_LM_RESP;
256 if (nt_pwd_len == 24) {
257 auth_flags |= AUTH_FLAG_NTLM_RESP;
258 } else if (nt_pwd_len != 0) {
259 auth_flags |= AUTH_FLAG_NTLMv2_RESP;
260 }
261
262 nt_status = make_user_info_map(user_info,
263 smb_name, client_domain,
264 wksta_name,
265 lm_blob, nt_blob,
266 plaintext_blob,
267 auth_flags, True);
268
269 ret = NT_STATUS_IS_OK(nt_status) ? True : False;
270
271 data_blob_free(&lm_blob);
272 data_blob_free(&nt_blob);
273 return ret;
274 }
275
276 /****************************************************************************
277 Create an auth_usersupplied_data, making the DATA_BLOBs here.
278 Decrypt and encrypt the passwords.
279 ****************************************************************************/
280
281 BOOL make_user_info_netlogon_interactive(auth_usersupplied_info **user_info,
282 const char *smb_name,
283 const char *client_domain,
284 const char *wksta_name,
285 const uchar chal[8],
286 const uchar lm_interactive_pwd[16],
287 const uchar nt_interactive_pwd[16],
288 const uchar *dc_sess_key)
289 {
290 char lm_pwd[16];
291 char nt_pwd[16];
292 unsigned char local_lm_response[24];
293 unsigned char local_nt_response[24];
294 unsigned char key[16];
295 uint32 auth_flags = AUTH_FLAG_NONE;
296
297 ZERO_STRUCT(key);
298 memcpy(key, dc_sess_key, 8);
299
300 if (lm_interactive_pwd) memcpy(lm_pwd, lm_interactive_pwd, sizeof(lm_pwd));
301 if (nt_interactive_pwd) memcpy(nt_pwd, nt_interactive_pwd, sizeof(nt_pwd));
302
303 #ifdef DEBUG_PASSWORD
304 DEBUG(100,("key:"));
305 dump_data(100, (char *)key, sizeof(key));
306
307 DEBUG(100,("lm owf password:"));
308 dump_data(100, lm_pwd, sizeof(lm_pwd));
309
310 DEBUG(100,("nt owf password:"));
311 dump_data(100, nt_pwd, sizeof(nt_pwd));
312 #endif
313
314 SamOEMhash((uchar *)lm_pwd, key, sizeof(lm_pwd));
315 SamOEMhash((uchar *)nt_pwd, key, sizeof(nt_pwd));
316
317 #ifdef DEBUG_PASSWORD
318 DEBUG(100,("decrypt of lm owf password:"));
319 dump_data(100, lm_pwd, sizeof(lm_pwd));
320
321 DEBUG(100,("decrypt of nt owf password:"));
322 dump_data(100, nt_pwd, sizeof(nt_pwd));
323 #endif
324
325 SMBOWFencrypt((const unsigned char *)lm_pwd, chal, local_lm_response);
326 SMBOWFencrypt((const unsigned char *)nt_pwd, chal, local_nt_response);
327
328 /* Password info paranoia */
329 ZERO_STRUCT(lm_pwd);
330 ZERO_STRUCT(nt_pwd);
331 ZERO_STRUCT(key);
332
333 {
334 BOOL ret;
335 NTSTATUS nt_status;
336 DATA_BLOB local_lm_blob = data_blob(local_lm_response, sizeof(local_lm_response));
337 DATA_BLOB local_nt_blob = data_blob(local_nt_response, sizeof(local_nt_response));
338 DATA_BLOB plaintext_blob = data_blob(NULL, 0);
339
340 if (lm_interactive_pwd)
341 auth_flags |= AUTH_FLAG_LM_RESP;
342 if (nt_interactive_pwd)
343 auth_flags |= AUTH_FLAG_NTLM_RESP;
344
345 nt_status = make_user_info_map(user_info,
346 smb_name, client_domain,
347 wksta_name,
348 local_lm_blob,
349 local_nt_blob,
350 plaintext_blob,
351 auth_flags, True);
352
353 ret = NT_STATUS_IS_OK(nt_status) ? True : False;
354 data_blob_free(&local_lm_blob);
355 data_blob_free(&local_nt_blob);
356 return ret;
357 }
358 }
359
360
361 /****************************************************************************
362 Create an auth_usersupplied_data structure
363 ****************************************************************************/
364
365 BOOL make_user_info_for_reply(auth_usersupplied_info **user_info,
366 const char *smb_name,
367 const char *client_domain,
368 const uint8 chal[8],
369 DATA_BLOB plaintext_password)
370 {
371
372 DATA_BLOB local_lm_blob;
373 DATA_BLOB local_nt_blob;
374 NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
375 uint32 auth_flags = AUTH_FLAG_NONE;
376
377 /*
378 * Not encrypted - do so.
379 */
380
381 DEBUG(5,("make_user_info_for_reply: User passwords not in encrypted format.\n"));
382
383 if (plaintext_password.data) {
384 unsigned char local_lm_response[24];
385
386 #ifdef DEBUG_PASSWORD
387 DEBUG(10,("Unencrypted password (len %d):\n",plaintext_password.length));
388 dump_data(100, plaintext_password.data, plaintext_password.length);
389 #endif
390
391 SMBencrypt( (const uchar *)plaintext_password.data, (const uchar*)chal, local_lm_response);
392 local_lm_blob = data_blob(local_lm_response, 24);
393
394 /* We can't do an NT hash here, as the password needs to be
395 case insensitive */
396 local_nt_blob = data_blob(NULL, 0);
397
398 auth_flags = (AUTH_FLAG_PLAINTEXT | AUTH_FLAG_LM_RESP);
399 } else {
400 local_lm_blob = data_blob(NULL, 0);
401 local_nt_blob = data_blob(NULL, 0);
402 }
403
404 ret = make_user_info_map(user_info, smb_name,
405 client_domain,
406 get_remote_machine_name(),
407 local_lm_blob,
408 local_nt_blob,
409 plaintext_password,
410 auth_flags, False);
411
412 data_blob_free(&local_lm_blob);
413 return NT_STATUS_IS_OK(ret) ? True : False;
414 }
415
416 /****************************************************************************
417 Create an auth_usersupplied_data structure
418 ****************************************************************************/
419
420 NTSTATUS make_user_info_for_reply_enc(auth_usersupplied_info **user_info,
421 const char *smb_name,
422 const char *client_domain,
423 DATA_BLOB lm_resp, DATA_BLOB nt_resp)
424 {
425 uint32 auth_flags = AUTH_FLAG_NONE;
426
427 DATA_BLOB no_plaintext_blob = data_blob(NULL, 0);
428
429 if (lm_resp.length == 24) {
430 auth_flags |= AUTH_FLAG_LM_RESP;
431 }
432 if (nt_resp.length == 0) {
433 } else if (nt_resp.length == 24) {
434 auth_flags |= AUTH_FLAG_NTLM_RESP;
435 } else {
436 auth_flags |= AUTH_FLAG_NTLMv2_RESP;
437 }
438
439 return make_user_info_map(user_info, smb_name,
440 client_domain,
441 get_remote_machine_name(),
442 lm_resp,
443 nt_resp,
444 no_plaintext_blob,
445 auth_flags, True);
446 }
447
448 /****************************************************************************
449 Create a guest user_info blob, for anonymous authenticaion.
450 ****************************************************************************/
451
452 BOOL make_user_info_guest(auth_usersupplied_info **user_info)
453 {
454 DATA_BLOB lm_blob = data_blob(NULL, 0);
455 DATA_BLOB nt_blob = data_blob(NULL, 0);
456 DATA_BLOB plaintext_blob = data_blob(NULL, 0);
457 uint32 auth_flags = AUTH_FLAG_NONE;
458 NTSTATUS nt_status;
459
460 nt_status = make_user_info(user_info,
461 "","",
462 "","",
463 "",
464 nt_blob, lm_blob,
465 plaintext_blob,
466 auth_flags, True);
467
468 return NT_STATUS_IS_OK(nt_status) ? True : False;
469 }
470
471 /****************************************************************************
472 prints a NT_USER_TOKEN to debug output.
473 ****************************************************************************/
474
475 void debug_nt_user_token(int dbg_class, int dbg_lev, NT_USER_TOKEN *token)
476 {
477 fstring sid_str;
478 size_t i;
479
480 if (!token) {
481 DEBUGC(dbg_class, dbg_lev, ("NT user token: (NULL)\n"));
482 return;
483 }
484
485 DEBUGC(dbg_class, dbg_lev, ("NT user token of user %s\n",
486 sid_to_string(sid_str, &token->user_sids[0]) ));
487 DEBUGADDC(dbg_class, dbg_lev, ("contains %i SIDs\n", token->num_sids));
488 for (i = 0; i < token->num_sids; i++)
489 DEBUGADDC(dbg_class, dbg_lev, ("SID[%3i]: %s\n", i,
490 sid_to_string(sid_str, &token->user_sids[i])));
491 }
492
493 /****************************************************************************
494 prints a UNIX 'token' to debug output.
495 ****************************************************************************/
496
497 void debug_unix_user_token(int dbg_class, int dbg_lev, uid_t uid, gid_t gid, int n_groups, gid_t *groups)
498 {
499 int i;
500 DEBUGC(dbg_class, dbg_lev, ("UNIX token of user %ld\n", (long int)uid));
501
502 DEBUGADDC(dbg_class, dbg_lev, ("Primary group is %ld and contains %i supplementary groups\n", (long int)gid, n_groups));
503 for (i = 0; i < n_groups; i++)
504 DEBUGADDC(dbg_class, dbg_lev, ("Group[%3i]: %ld\n", i,
505 (long int)groups[i]));
506 }
507
508 /****************************************************************************
509 Create the SID list for this user.
510 ****************************************************************************/
511
512 static NTSTATUS create_nt_user_token(const DOM_SID *user_sid, const DOM_SID *group_sid,
513 int n_groupSIDs, DOM_SID *groupSIDs,
514 BOOL is_guest, NT_USER_TOKEN **token)
515 {
516 NTSTATUS nt_status = NT_STATUS_OK;
517 NT_USER_TOKEN *ptoken;
518 int i;
519 int sid_ndx;
520
521 if ((ptoken = malloc( sizeof(NT_USER_TOKEN) ) ) == NULL) {
522 DEBUG(0, ("create_nt_token: Out of memory allocating token\n"));
523 nt_status = NT_STATUS_NO_MEMORY;
524 return nt_status;
525 }
526
527 ZERO_STRUCTP(ptoken);
528
529 ptoken->num_sids = n_groupSIDs + 5;
530
531 if ((ptoken->user_sids = (DOM_SID *)malloc( sizeof(DOM_SID) * ptoken->num_sids )) == NULL) {
532 DEBUG(0, ("create_nt_token: Out of memory allocating SIDs\n"));
533 nt_status = NT_STATUS_NO_MEMORY;
534 return nt_status;
535 }
536
537 memset((char*)ptoken->user_sids,0,sizeof(DOM_SID) * ptoken->num_sids);
538
539 /*
540 * Note - user SID *MUST* be first in token !
541 * se_access_check depends on this.
542 *
543 * Primary group SID is second in token. Convention.
544 */
545
546 sid_copy(&ptoken->user_sids[PRIMARY_USER_SID_INDEX], user_sid);
547 if (group_sid)
548 sid_copy(&ptoken->user_sids[PRIMARY_GROUP_SID_INDEX], group_sid);
549
550 /*
551 * Finally add the "standard" SIDs.
552 * The only difference between guest and "anonymous" (which we
553 * don't really support) is the addition of Authenticated_Users.
554 */
555
556 sid_copy(&ptoken->user_sids[2], &global_sid_World);
557 sid_copy(&ptoken->user_sids[3], &global_sid_Network);
558
559 if (is_guest)
560 sid_copy(&ptoken->user_sids[4], &global_sid_Builtin_Guests);
561 else
562 sid_copy(&ptoken->user_sids[4], &global_sid_Authenticated_Users);
563
564 sid_ndx = 5; /* next available spot */
565
566 for (i = 0; i < n_groupSIDs; i++) {
567 size_t check_sid_idx;
568 for (check_sid_idx = 1; check_sid_idx < ptoken->num_sids; check_sid_idx++) {
569 if (sid_equal(&ptoken->user_sids[check_sid_idx],
570 &groupSIDs[i])) {
571 break;
572 }
573 }
574
575 if (check_sid_idx >= ptoken->num_sids) /* Not found already */ {
576 sid_copy(&ptoken->user_sids[sid_ndx++], &groupSIDs[i]);
577 } else {
578 ptoken->num_sids--;
579 }
580 }
581
582 debug_nt_user_token(DBGC_AUTH, 10, ptoken);
583
584 *token = ptoken;
585
586 return nt_status;
587 }
588
589 /****************************************************************************
590 Create the SID list for this user.
591 ****************************************************************************/
592
593 NT_USER_TOKEN *create_nt_token(uid_t uid, gid_t gid, int ngroups, gid_t *groups, BOOL is_guest)
594 {
595 DOM_SID user_sid;
596 DOM_SID group_sid;
597 DOM_SID *group_sids;
598 NT_USER_TOKEN *token;
599 int i;
600
601 if (!uid_to_sid(&user_sid, uid)) {
602 return NULL;
603 }
604 if (!gid_to_sid(&group_sid, gid)) {
605 return NULL;
606 }
607
608 group_sids = malloc(sizeof(DOM_SID) * ngroups);
609 if (!group_sids) {
610 DEBUG(0, ("create_nt_token: malloc() failed for DOM_SID list!\n"));
611 return NULL;
612 }
613
614 for (i = 0; i < ngroups; i++) {
615 if (!gid_to_sid(&(group_sids)[i], (groups)[i])) {
616 DEBUG(1, ("create_nt_token: failed to convert gid %ld to a sid!\n", (long int)groups[i]));
617 SAFE_FREE(group_sids);
618 return NULL;
619 }
620 }
621
622 if (!NT_STATUS_IS_OK(create_nt_user_token(&user_sid, &group_sid,
623 ngroups, group_sids, is_guest, &token))) {
624 SAFE_FREE(group_sids);
625 return NULL;
626 }
627
628 SAFE_FREE(group_sids);
629
630 return token;
631 }
632
633 /******************************************************************************
634 * this function returns the groups (SIDs) of the local SAM the user is in.
635 * If this samba server is a DC of the domain the user belongs to, it returns
636 * both domain groups and local / builtin groups. If the user is in a trusted
637 * domain, or samba is a member server of a domain, then this function returns
638 * local and builtin groups the user is a member of.
639 *
640 * currently this is a hack, as there is no sam implementation that is capable
641 * of groups.
642 ******************************************************************************/
643
644 static NTSTATUS get_user_groups_from_local_sam(const DOM_SID *user_sid,
645 int *n_groups, DOM_SID **groups, gid_t **unix_groups)
646 {
647 uid_t uid;
648 enum SID_NAME_USE snu;
649 fstring str;
650 int n_unix_groups;
651 int i;
652 struct passwd *usr;
653
654 *n_groups = 0;
655 *groups = NULL;
656
657 if (!sid_to_uid(user_sid, &uid, &snu)) {
658 DEBUG(2, ("get_user_groups_from_local_sam: Failed to convert user SID %s to a uid!\n",
659 sid_to_string(str, user_sid)));
660 /* This might be a non-unix account */
661 return NT_STATUS_OK;
662 }
663
664 /*
665 * This is _essential_ to prevent occasional segfaults when
666 * winbind can't find uid -> username mapping
667 */
668 if (!(usr = getpwuid_alloc(uid))) {
669 DEBUG(0, ("Couldn't find passdb structure for UID = %d ! Aborting.\n", uid));
670 return NT_STATUS_NO_SUCH_USER;
671 };
672
673 n_unix_groups = groups_max();
674 if ((*unix_groups = malloc( sizeof(gid_t) * groups_max() ) ) == NULL) {
675 DEBUG(0, ("get_user_groups_from_local_sam: Out of memory allocating unix group list\n"));
676 passwd_free(&usr);
677 return NT_STATUS_NO_MEMORY;
678 }
679
680 if (sys_getgrouplist(usr->pw_name, usr->pw_gid, *unix_groups, &n_unix_groups) == -1) {
681 *unix_groups = Realloc(*unix_groups, sizeof(gid_t) * n_unix_groups);
682 if (sys_getgrouplist(usr->pw_name, usr->pw_gid, *unix_groups, &n_unix_groups) == -1) {
683 DEBUG(0, ("get_user_groups_from_local_sam: failed to get the unix group list\n"));
684 SAFE_FREE(*unix_groups);
685 passwd_free(&usr);
686 return NT_STATUS_NO_SUCH_USER; /* what should this return value be? */
687 }
688 }
689
690 debug_unix_user_token(DBGC_CLASS, 5, usr->pw_uid, usr->pw_gid, n_unix_groups, *unix_groups);
691
692 passwd_free(&usr);
693
694 if (n_unix_groups > 0) {
695 *groups = malloc(sizeof(DOM_SID) * n_unix_groups);
696 if (!*groups) {
697 DEBUG(0, ("get_user_group_from_local_sam: malloc() failed for DOM_SID list!\n"));
698 SAFE_FREE(*unix_groups);
699 return NT_STATUS_NO_MEMORY;
700 }
701 }
702
703 *n_groups = n_unix_groups;
704
705 for (i = 0; i < *n_groups; i++) {
706 if (!gid_to_sid(&(*groups)[i], (*unix_groups)[i])) {
707 DEBUG(1, ("get_user_groups_from_local_sam: failed to convert gid %ld to a sid!\n", (long int)(*unix_groups)[i+1]));
708 SAFE_FREE(*groups);
709 SAFE_FREE(*unix_groups);
710 return NT_STATUS_NO_SUCH_USER;
711 }
712 }
713
714 return NT_STATUS_OK;
715 }
716
717 /***************************************************************************
718 Make a user_info struct
719 ***************************************************************************/
720
721 static NTSTATUS make_server_info(auth_serversupplied_info **server_info, SAM_ACCOUNT *sampass)
722 {
723 *server_info = malloc(sizeof(**server_info));
724 if (!*server_info) {
725 DEBUG(0,("make_server_info: malloc failed!\n"));
726 return NT_STATUS_NO_MEMORY;
727 }
728 ZERO_STRUCTP(*server_info);
729
730 (*server_info)->sam_fill_level = SAM_FILL_ALL;
731 (*server_info)->sam_account = sampass;
732
733 return NT_STATUS_OK;
734 }
735
736 /***************************************************************************
737 Make (and fill) a user_info struct from a SAM_ACCOUNT
738 ***************************************************************************/
739
740 NTSTATUS make_server_info_sam(auth_serversupplied_info **server_info,
741 SAM_ACCOUNT *sampass)
742 {
743 NTSTATUS nt_status = NT_STATUS_OK;
744 const DOM_SID *user_sid = pdb_get_user_sid(sampass);
745 const DOM_SID *group_sid = pdb_get_group_sid(sampass);
746 int n_groupSIDs = 0;
747 DOM_SID *groupSIDs = NULL;
748 gid_t *unix_groups = NULL;
749 NT_USER_TOKEN *token;
750 BOOL is_guest;
751 uint32 rid;
752
753 if (!NT_STATUS_IS_OK(nt_status = make_server_info(server_info, sampass))) {
754 return nt_status;
755 }
756
757 if (!NT_STATUS_IS_OK(nt_status
758 = get_user_groups_from_local_sam(pdb_get_user_sid(sampass),
759 &n_groupSIDs, &groupSIDs, &unix_groups)))
760 {
761 DEBUG(4,("get_user_groups_from_local_sam failed\n"));
762 free_server_info(server_info);
763 return nt_status;
764 }
765
766 is_guest = (sid_peek_rid(user_sid, &rid) && rid == DOMAIN_USER_RID_GUEST);
767
768 if (!NT_STATUS_IS_OK(nt_status = create_nt_user_token(user_sid, group_sid,
769 n_groupSIDs, groupSIDs, is_guest,
770 &token)))
771 {
772 DEBUG(4,("create_nt_user_token failed\n"));
773 SAFE_FREE(groupSIDs);
774 SAFE_FREE(unix_groups);
775 free_server_info(server_info);
776 return nt_status;
777 }
778
779 SAFE_FREE(groupSIDs);
780
781 (*server_info)->n_groups = n_groupSIDs;
782 (*server_info)->groups = unix_groups;
783
784 (*server_info)->ptok = token;
785
786 DEBUG(5,("make_server_info_sam: made server info for user %s\n",
787 pdb_get_username((*server_info)->sam_account)));
788
789 return nt_status;
790 }
791
792 /***************************************************************************
793 Make (and fill) a user_info struct from a 'struct passwd' by conversion
794 to a SAM_ACCOUNT
795 ***************************************************************************/
796
797 NTSTATUS make_server_info_pw(auth_serversupplied_info **server_info, const struct passwd *pwd)
798 {
799 NTSTATUS nt_status;
800 SAM_ACCOUNT *sampass = NULL;
801 if (!NT_STATUS_IS_OK(nt_status = pdb_init_sam_pw(&sampass, pwd))) {
802 return nt_status;
803 }
804 return make_server_info_sam(server_info, sampass);
805 }
806
807 /***************************************************************************
808 Make (and fill) a user_info struct for a guest login.
809 ***************************************************************************/
810
811 NTSTATUS make_server_info_guest(auth_serversupplied_info **server_info)
812 {
813 NTSTATUS nt_status;
814 SAM_ACCOUNT *sampass = NULL;
815 DOM_SID guest_sid;
816
817 if (!NT_STATUS_IS_OK(nt_status = pdb_init_sam(&sampass))) {
818 return nt_status;
819 }
820
821 sid_copy(&guest_sid, get_global_sam_sid());
822 sid_append_rid(&guest_sid, DOMAIN_USER_RID_GUEST);
823
824 become_root();
825 if (!pdb_getsampwsid(sampass, &guest_sid)) {
826 unbecome_root();
827 return NT_STATUS_NO_SUCH_USER;
828 }
829 unbecome_root();
830
831 nt_status = make_server_info_sam(server_info, sampass);
832
833 (*server_info)->guest = True;
834
835 return nt_status;
836 }
837
838 /***************************************************************************
839 Make a server_info struct from the info3 returned by a domain logon
840 ***************************************************************************/
841
842 NTSTATUS make_server_info_info3(TALLOC_CTX *mem_ctx,
843 const char *internal_username,
844 const char *sent_nt_username,
845 const char *domain,
846 auth_serversupplied_info **server_info,
847 NET_USER_INFO_3 *info3)
848 {
849 NTSTATUS nt_status = NT_STATUS_OK;
850
851 const char *nt_domain;
852 const char *nt_username;
853
854 SAM_ACCOUNT *sam_account = NULL;
855 DOM_SID user_sid;
856 DOM_SID group_sid;
857
858 struct passwd *passwd;
859
860 uid_t uid;
861 gid_t gid;
862
863 int n_lgroupSIDs;
864 DOM_SID *lgroupSIDs = NULL;
865
866 gid_t *unix_groups = NULL;
867 NT_USER_TOKEN *token;
868
869 DOM_SID *all_group_SIDs;
870 size_t i;
871
872 /*
873 Here is where we should check the list of
874 trusted domains, and verify that the SID
875 matches.
876 */
877
878 sid_copy(&user_sid, &info3->dom_sid.sid);
879 if (!sid_append_rid(&user_sid, info3->user_rid)) {
880 return NT_STATUS_INVALID_PARAMETER;
881 }
882
883 sid_copy(&group_sid, &info3->dom_sid.sid);
884 if (!sid_append_rid(&group_sid, info3->group_rid)) {
885 return NT_STATUS_INVALID_PARAMETER;
886 }
887
888 if (!(nt_username = unistr2_tdup(mem_ctx, &(info3->uni_user_name)))) {
889 /* If the server didn't give us one, just use the one we sent them */
890 nt_username = sent_nt_username;
891 }
892
893 if (!(nt_domain = unistr2_tdup(mem_ctx, &(info3->uni_logon_dom)))) {
894 /* If the server didn't give us one, just use the one we sent them */
895 domain = domain;
896 }
897
898 if (winbind_sid_to_uid(&uid, &user_sid)
899 && winbind_sid_to_gid(&gid, &group_sid)
900 && ((passwd = getpwuid_alloc(uid)))) {
901 nt_status = pdb_init_sam_pw(&sam_account, passwd);
902 passwd_free(&passwd);
903 } else {
904 char *dom_user;
905 dom_user = talloc_asprintf(mem_ctx, "%s%s%s",
906 nt_domain,
907 lp_winbind_separator(),
908 internal_username);
909
910 if (!dom_user) {
911 DEBUG(0, ("talloc_asprintf failed!\n"));
912 return NT_STATUS_NO_MEMORY;
913 } else {
914
915 if (!(passwd = Get_Pwnam(dom_user))
916 /* Only lookup local for the local
917 domain, we don't want this for
918 trusted domains */
919 && strequal(nt_domain, lp_workgroup())) {
920 passwd = Get_Pwnam(internal_username);
921 }
922
923 if (!passwd) {
924 return NT_STATUS_NO_SUCH_USER;
925 } else {
926 nt_status = pdb_init_sam_pw(&sam_account, passwd);
927 }
928 }
929 }
930
931 if (!NT_STATUS_IS_OK(nt_status)) {
932 DEBUG(0, ("make_server_info_info3: pdb_init_sam failed!\n"));
933 return nt_status;
934 }
935
936 if (!pdb_set_user_sid(sam_account, &user_sid, PDB_CHANGED)) {
937 pdb_free_sam(&sam_account);
938 return NT_STATUS_UNSUCCESSFUL;
939 }
940
941 if (!pdb_set_group_sid(sam_account, &group_sid, PDB_CHANGED)) {
942 pdb_free_sam(&sam_account);
943 return NT_STATUS_UNSUCCESSFUL;
944 }
945
946 if (!pdb_set_nt_username(sam_account, nt_username, PDB_CHANGED)) {
947 pdb_free_sam(&sam_account);
948 return NT_STATUS_NO_MEMORY;
949 }
950
951 if (!pdb_set_domain(sam_account, nt_domain, PDB_CHANGED)) {
952 pdb_free_sam(&sam_account);
953 return NT_STATUS_NO_MEMORY;
954 }
955
956 if (!pdb_set_fullname(sam_account, unistr2_static(&(info3->uni_full_name)), PDB_CHANGED)) {
957 pdb_free_sam(&sam_account);
958 return NT_STATUS_NO_MEMORY;
959 }
960
961 if (!pdb_set_logon_script(sam_account, unistr2_static(&(info3->uni_logon_script)), PDB_CHANGED)) {
962 pdb_free_sam(&sam_account);
963 return NT_STATUS_NO_MEMORY;
964 }
965
966 if (!pdb_set_profile_path(sam_account, unistr2_static(&(info3->uni_profile_path)), PDB_CHANGED)) {
967 pdb_free_sam(&sam_account);
968 return NT_STATUS_NO_MEMORY;
969 }
970
971 if (!pdb_set_homedir(sam_account, unistr2_static(&(info3->uni_home_dir)), PDB_CHANGED)) {
972 pdb_free_sam(&sam_account);
973 return NT_STATUS_NO_MEMORY;
974 }
975
976 if (!pdb_set_dir_drive(sam_account, unistr2_static(&(info3->uni_dir_drive)), PDB_CHANGED)) {
977 pdb_free_sam(&sam_account);
978 return NT_STATUS_NO_MEMORY;
979 }
980
981 if (!NT_STATUS_IS_OK(nt_status = make_server_info(server_info, sam_account))) {
982 DEBUG(4, ("make_server_info failed!\n"));
983 pdb_free_sam(&sam_account);
984 return nt_status;
985 }
986
987 /* Store the user group information in the server_info
988 returned to the caller. */
989
990 if (!NT_STATUS_IS_OK(nt_status
991 = get_user_groups_from_local_sam(&user_sid,
992 &n_lgroupSIDs,
993 &lgroupSIDs,
994 &unix_groups)))
995 {
996 DEBUG(4,("get_user_groups_from_local_sam failed\n"));
997 return nt_status;
998 }
999
1000 (*server_info)->groups = unix_groups;
1001 (*server_info)->n_groups = n_lgroupSIDs;
1002
1003 /* Create a 'combined' list of all SIDs we might want in the SD */
1004 all_group_SIDs = malloc(sizeof(DOM_SID) *
1005 (n_lgroupSIDs + info3->num_groups2 +
1006 info3->num_other_sids));
1007 if (!all_group_SIDs) {
1008 DEBUG(0, ("create_nt_token_info3: malloc() failed for DOM_SID list!\n"));
1009 SAFE_FREE(lgroupSIDs);
1010 return NT_STATUS_NO_MEMORY;
1011 }
1012
1013 /* Copy the 'local' sids */
1014 memcpy(all_group_SIDs, lgroupSIDs, sizeof(DOM_SID) * n_lgroupSIDs);
1015 SAFE_FREE(lgroupSIDs);
1016
1017 /* and create (by appending rids) the 'domain' sids */
1018 for (i = 0; i < info3->num_groups2; i++) {
1019 sid_copy(&all_group_SIDs[i+n_lgroupSIDs], &(info3->dom_sid.sid));
1020 if (!sid_append_rid(&all_group_SIDs[i+n_lgroupSIDs], info3->gids[i].g_rid)) {
1021 nt_status = NT_STATUS_INVALID_PARAMETER;
1022 DEBUG(3,("create_nt_token_info3: could not append additional group rid 0x%x\n",
1023 info3->gids[i].g_rid));
1024 SAFE_FREE(lgroupSIDs);
1025 return nt_status;
1026 }
1027 }
1028
1029 /* Copy 'other' sids. We need to do sid filtering here to
1030 prevent possible elevation of privileges. See:
1031
1032 http://www.microsoft.com/windows2000/techinfo/administration/security/sidfilter.asp
1033 */
1034
1035 for (i = 0; i < info3->num_other_sids; i++)
1036 sid_copy(&all_group_SIDs[
1037 n_lgroupSIDs + info3->num_groups2 + i],
1038 &info3->other_sids[i].sid);
1039
1040 /* Where are the 'global' sids... */
1041
1042 /* can the user be guest? if yes, where is it stored? */
1043 if (!NT_STATUS_IS_OK(
1044 nt_status = create_nt_user_token(
1045 &user_sid, &group_sid,
1046 n_lgroupSIDs + info3->num_groups2 + info3->num_other_sids,
1047 all_group_SIDs, False, &token))) {
1048 DEBUG(4,("create_nt_user_token failed\n"));
1049 SAFE_FREE(all_group_SIDs);
1050 return nt_status;
1051 }
1052
1053 (*server_info)->ptok = token;
1054
1055 SAFE_FREE(all_group_SIDs);
1056
1057 return NT_STATUS_OK;
1058 }
1059
1060 /***************************************************************************
1061 Free a user_info struct
1062 ***************************************************************************/
1063
1064 void free_user_info(auth_usersupplied_info **user_info)
1065 {
1066 DEBUG(5,("attempting to free (and zero) a user_info structure\n"));
1067 if (*user_info != NULL) {
1068 if ((*user_info)->smb_name.str) {
1069 DEBUG(10,("structure was created for %s\n", (*user_info)->smb_name.str));
1070 }
1071 SAFE_FREE((*user_info)->smb_name.str);
1072 SAFE_FREE((*user_info)->internal_username.str);
1073 SAFE_FREE((*user_info)->client_domain.str);
1074 SAFE_FREE((*user_info)->domain.str);
1075 SAFE_FREE((*user_info)->wksta_name.str);
1076 data_blob_free(&(*user_info)->lm_resp);
1077 data_blob_free(&(*user_info)->nt_resp);
1078 SAFE_FREE((*user_info)->interactive_password);
1079 data_blob_clear_free(&(*user_info)->plaintext_password);
1080 ZERO_STRUCT(**user_info);
1081 }
1082 SAFE_FREE(*user_info);
1083 }
1084
1085 /***************************************************************************
1086 Clear out a server_info struct that has been allocated
1087 ***************************************************************************/
1088
1089 void free_server_info(auth_serversupplied_info **server_info)
1090 {
1091 DEBUG(5,("attempting to free (and zero) a server_info structure\n"));
1092 if (*server_info != NULL) {
1093 pdb_free_sam(&(*server_info)->sam_account);
1094
1095 /* call pam_end here, unless we know we are keeping it */
1096 delete_nt_token( &(*server_info)->ptok );
1097 SAFE_FREE((*server_info)->groups);
1098 ZERO_STRUCT(**server_info);
1099 }
1100 SAFE_FREE(*server_info);
1101 }
1102
1103 /***************************************************************************
1104 Make an auth_methods struct
1105 ***************************************************************************/
1106
1107 BOOL make_auth_methods(struct auth_context *auth_context, auth_methods **auth_method)
1108 {
1109 if (!auth_context) {
1110 smb_panic("no auth_context supplied to make_auth_methods()!\n");
1111 }
1112
1113 if (!auth_method) {
1114 smb_panic("make_auth_methods: pointer to auth_method pointer is NULL!\n");
1115 }
1116
1117 *auth_method = talloc(auth_context->mem_ctx, sizeof(**auth_method));
1118 if (!*auth_method) {
1119 DEBUG(0,("make_auth_method: malloc failed!\n"));
1120 return False;
1121 }
1122 ZERO_STRUCTP(*auth_method);
1123
1124 return True;
1125 }
1126
1127 /****************************************************************************
1128 Delete a SID token.
1129 ****************************************************************************/
1130
1131 void delete_nt_token(NT_USER_TOKEN **pptoken)
1132 {
1133 if (*pptoken) {
1134 NT_USER_TOKEN *ptoken = *pptoken;
1135 SAFE_FREE( ptoken->user_sids );
1136 ZERO_STRUCTP(ptoken);
1137 }
1138 SAFE_FREE(*pptoken);
1139 }
1140
1141 /****************************************************************************
1142 Duplicate a SID token.
1143 ****************************************************************************/
1144
1145 NT_USER_TOKEN *dup_nt_token(NT_USER_TOKEN *ptoken)
1146 {
1147 NT_USER_TOKEN *token;
1148
1149 if (!ptoken)
1150 return NULL;
1151
1152 if ((token = (NT_USER_TOKEN *)malloc( sizeof(NT_USER_TOKEN) ) ) == NULL)
1153 return NULL;
1154
1155 ZERO_STRUCTP(token);
1156
1157 if ((token->user_sids = (DOM_SID *)memdup( ptoken->user_sids, sizeof(DOM_SID) * ptoken->num_sids )) == NULL) {
1158 SAFE_FREE(token);
1159 return NULL;
1160 }
1161
1162 token->num_sids = ptoken->num_sids;
1163
1164 return token;
1165 }
1166
1167 /**
1168 * Squash an NT_STATUS in line with security requirements.
1169 * In an attempt to avoid giving the whole game away when users
1170 * are authenticating, NT replaces both NT_STATUS_NO_SUCH_USER and
1171 * NT_STATUS_WRONG_PASSWORD with NT_STATUS_LOGON_FAILURE in certain situations
1172 * (session setups in particular).
1173 *
1174 * @param nt_status NTSTATUS input for squashing.
1175 * @return the 'squashed' nt_status
1176 **/
1177
1178 NTSTATUS nt_status_squash(NTSTATUS nt_status)
1179 {
1180 if NT_STATUS_IS_OK(nt_status) {
1181 return nt_status;
1182 } else if NT_STATUS_EQUAL(nt_status, NT_STATUS_NO_SUCH_USER) {
1183 /* Match WinXP and don't give the game away */
1184 return NT_STATUS_LOGON_FAILURE;
1185
1186 } else if NT_STATUS_EQUAL(nt_status, NT_STATUS_WRONG_PASSWORD) {
1187 /* Match WinXP and don't give the game away */
1188 return NT_STATUS_LOGON_FAILURE;
1189 } else {
1190 return nt_status;
1191 }
1192 }
1193
1194
1195
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