source: branches/samba-3.5.x/source3/smbd/password.c

Last change on this file was 596, checked in by Herwig Bauernfeind, 14 years ago

Samba 3.5: Update trunk to 3.5.8
File size: 23.5 KB
Line 
1/*
2 Unix SMB/CIFS implementation.
3 Password and authentication handling
4 Copyright (C) Andrew Tridgell 1992-1998
5 Copyright (C) Jeremy Allison 2007.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>.
19*/
20
21#include "includes.h"
22#include "smbd/globals.h"
23
24enum server_allocated_state { SERVER_ALLOCATED_REQUIRED_YES,
25 SERVER_ALLOCATED_REQUIRED_NO,
26 SERVER_ALLOCATED_REQUIRED_ANY};
27
28static user_struct *get_valid_user_struct_internal(
29 struct smbd_server_connection *sconn,
30 uint16 vuid,
31 enum server_allocated_state server_allocated)
32{
33 user_struct *usp;
34 int count=0;
35
36 if (vuid == UID_FIELD_INVALID)
37 return NULL;
38
39 usp=sconn->smb1.sessions.validated_users;
40 for (;usp;usp=usp->next,count++) {
41 if (vuid == usp->vuid) {
42 switch (server_allocated) {
43 case SERVER_ALLOCATED_REQUIRED_YES:
44 if (usp->server_info == NULL) {
45 continue;
46 }
47 break;
48 case SERVER_ALLOCATED_REQUIRED_NO:
49 if (usp->server_info != NULL) {
50 continue;
51 }
52 case SERVER_ALLOCATED_REQUIRED_ANY:
53 break;
54 }
55 if (count > 10) {
56 DLIST_PROMOTE(sconn->smb1.sessions.validated_users,
57 usp);
58 }
59 return usp;
60 }
61 }
62
63 return NULL;
64}
65
66/****************************************************************************
67 Check if a uid has been validated, and return an pointer to the user_struct
68 if it has. NULL if not. vuid is biased by an offset. This allows us to
69 tell random client vuid's (normally zero) from valid vuids.
70****************************************************************************/
71
72user_struct *get_valid_user_struct(struct smbd_server_connection *sconn,
73 uint16 vuid)
74{
75 return get_valid_user_struct_internal(sconn, vuid,
76 SERVER_ALLOCATED_REQUIRED_YES);
77}
78
79bool is_partial_auth_vuid(struct smbd_server_connection *sconn, uint16 vuid)
80{
81 return (get_partial_auth_user_struct(sconn, vuid) != NULL);
82}
83
84/****************************************************************************
85 Get the user struct of a partial NTLMSSP login
86****************************************************************************/
87
88user_struct *get_partial_auth_user_struct(struct smbd_server_connection *sconn,
89 uint16 vuid)
90{
91 return get_valid_user_struct_internal(sconn, vuid,
92 SERVER_ALLOCATED_REQUIRED_NO);
93}
94
95/****************************************************************************
96 Invalidate a uid.
97****************************************************************************/
98
99void invalidate_vuid(struct smbd_server_connection *sconn, uint16 vuid)
100{
101 user_struct *vuser = NULL;
102
103 vuser = get_valid_user_struct_internal(sconn, vuid,
104 SERVER_ALLOCATED_REQUIRED_ANY);
105 if (vuser == NULL) {
106 return;
107 }
108
109 session_yield(vuser);
110
111 if (vuser->auth_ntlmssp_state) {
112 auth_ntlmssp_end(&vuser->auth_ntlmssp_state);
113 }
114
115 DLIST_REMOVE(sconn->smb1.sessions.validated_users, vuser);
116
117 /* clear the vuid from the 'cache' on each connection, and
118 from the vuid 'owner' of connections */
119 conn_clear_vuid_caches(sconn, vuid);
120
121 TALLOC_FREE(vuser);
122 sconn->smb1.sessions.num_validated_vuids--;
123}
124
125/****************************************************************************
126 Invalidate all vuid entries for this process.
127****************************************************************************/
128
129void invalidate_all_vuids(struct smbd_server_connection *sconn)
130{
131 if (sconn->allow_smb2) {
132 return;
133 }
134
135 while (sconn->smb1.sessions.validated_users != NULL) {
136 invalidate_vuid(sconn,
137 sconn->smb1.sessions.validated_users->vuid);
138 }
139}
140
141static void increment_next_vuid(uint16_t *vuid)
142{
143 *vuid += 1;
144
145 /* Check for vuid wrap. */
146 if (*vuid == UID_FIELD_INVALID) {
147 *vuid = VUID_OFFSET;
148 }
149}
150
151/****************************************************
152 Create a new partial auth user struct.
153*****************************************************/
154
155int register_initial_vuid(struct smbd_server_connection *sconn)
156{
157 user_struct *vuser;
158
159 /* Paranoia check. */
160 if(lp_security() == SEC_SHARE) {
161 smb_panic("register_initial_vuid: "
162 "Tried to register uid in security=share");
163 }
164
165 /* Limit allowed vuids to 16bits - VUID_OFFSET. */
166 if (sconn->smb1.sessions.num_validated_vuids >= 0xFFFF-VUID_OFFSET) {
167 return UID_FIELD_INVALID;
168 }
169
170 if((vuser = talloc_zero(NULL, user_struct)) == NULL) {
171 DEBUG(0,("register_initial_vuid: "
172 "Failed to talloc users struct!\n"));
173 return UID_FIELD_INVALID;
174 }
175
176 /* Allocate a free vuid. Yes this is a linear search... */
177 while( get_valid_user_struct_internal(sconn,
178 sconn->smb1.sessions.next_vuid,
179 SERVER_ALLOCATED_REQUIRED_ANY) != NULL ) {
180 increment_next_vuid(&sconn->smb1.sessions.next_vuid);
181 }
182
183 DEBUG(10,("register_initial_vuid: allocated vuid = %u\n",
184 (unsigned int)sconn->smb1.sessions.next_vuid ));
185
186 vuser->vuid = sconn->smb1.sessions.next_vuid;
187
188 /*
189 * This happens in an unfinished NTLMSSP session setup. We
190 * need to allocate a vuid between the first and second calls
191 * to NTLMSSP.
192 */
193 increment_next_vuid(&sconn->smb1.sessions.next_vuid);
194 sconn->smb1.sessions.num_validated_vuids++;
195
196 DLIST_ADD(sconn->smb1.sessions.validated_users, vuser);
197 return vuser->vuid;
198}
199
200static int register_homes_share(const char *username)
201{
202 int result;
203 struct passwd *pwd;
204
205 result = lp_servicenumber(username);
206 if (result != -1) {
207 DEBUG(3, ("Using static (or previously created) service for "
208 "user '%s'; path = '%s'\n", username,
209 lp_pathname(result)));
210 return result;
211 }
212
213 pwd = Get_Pwnam_alloc(talloc_tos(), username);
214
215 if ((pwd == NULL) || (pwd->pw_dir[0] == '\0')) {
216 DEBUG(3, ("No home directory defined for user '%s'\n",
217 username));
218 TALLOC_FREE(pwd);
219 return -1;
220 }
221
222#ifdef __OS2__
223 /* On OS/2 we use drive letters which have a colon. This is also the field
224 separator in master.passwd, so we use a $ instead of a colon for the drive
225 separator, ie e$/user instead of e:/user. This code simply exchanges any $
226 for a : in the user's homedir */
227 if (pwd->pw_dir[1] == '$')
228 pwd->pw_dir[1] = ':';
229#endif
230
231 DEBUG(3, ("Adding homes service for user '%s' using home directory: "
232 "'%s'\n", username, pwd->pw_dir));
233
234 result = add_home_service(username, username, pwd->pw_dir);
235
236 TALLOC_FREE(pwd);
237 return result;
238}
239
240/**
241 * register that a valid login has been performed, establish 'session'.
242 * @param server_info The token returned from the authentication process.
243 * (now 'owned' by register_existing_vuid)
244 *
245 * @param session_key The User session key for the login session (now also
246 * 'owned' by register_existing_vuid)
247 *
248 * @param respose_blob The NT challenge-response, if available. (May be
249 * freed after this call)
250 *
251 * @param smb_name The untranslated name of the user
252 *
253 * @return Newly allocated vuid, biased by an offset. (This allows us to
254 * tell random client vuid's (normally zero) from valid vuids.)
255 *
256 */
257
258int register_existing_vuid(struct smbd_server_connection *sconn,
259 uint16 vuid,
260 auth_serversupplied_info *server_info,
261 DATA_BLOB response_blob,
262 const char *smb_name)
263{
264 fstring tmp;
265 user_struct *vuser;
266
267 vuser = get_partial_auth_user_struct(sconn, vuid);
268 if (!vuser) {
269 goto fail;
270 }
271
272 /* Use this to keep tabs on all our info from the authentication */
273 vuser->server_info = talloc_move(vuser, &server_info);
274
275 /* This is a potentially untrusted username */
276 alpha_strcpy(tmp, smb_name, ". _-$", sizeof(tmp));
277
278 vuser->server_info->sanitized_username = talloc_strdup(
279 vuser->server_info, tmp);
280
281 DEBUG(10,("register_existing_vuid: (%u,%u) %s %s %s guest=%d\n",
282 (unsigned int)vuser->server_info->utok.uid,
283 (unsigned int)vuser->server_info->utok.gid,
284 vuser->server_info->unix_name,
285 vuser->server_info->sanitized_username,
286 pdb_get_domain(vuser->server_info->sam_account),
287 vuser->server_info->guest ));
288
289 DEBUG(3, ("register_existing_vuid: User name: %s\t"
290 "Real name: %s\n", vuser->server_info->unix_name,
291 pdb_get_fullname(vuser->server_info->sam_account)));
292
293 if (!vuser->server_info->ptok) {
294 DEBUG(1, ("register_existing_vuid: server_info does not "
295 "contain a user_token - cannot continue\n"));
296 goto fail;
297 }
298
299 DEBUG(3,("register_existing_vuid: UNIX uid %d is UNIX user %s, "
300 "and will be vuid %u\n", (int)vuser->server_info->utok.uid,
301 vuser->server_info->unix_name, vuser->vuid));
302
303 if (!session_claim(vuser)) {
304 DEBUG(1, ("register_existing_vuid: Failed to claim session "
305 "for vuid=%d\n",
306 vuser->vuid));
307 goto fail;
308 }
309
310 /* Register a home dir service for this user if
311 (a) This is not a guest connection,
312 (b) we have a home directory defined
313 (c) there s not an existing static share by that name
314 If a share exists by this name (autoloaded or not) reuse it . */
315
316 vuser->homes_snum = -1;
317
318 if (!vuser->server_info->guest) {
319 vuser->homes_snum = register_homes_share(
320 vuser->server_info->unix_name);
321 }
322
323 if (srv_is_signing_negotiated(smbd_server_conn) &&
324 !vuser->server_info->guest) {
325 /* Try and turn on server signing on the first non-guest
326 * sessionsetup. */
327 srv_set_signing(smbd_server_conn,
328 vuser->server_info->user_session_key,
329 response_blob);
330 }
331
332 /* fill in the current_user_info struct */
333 set_current_user_info(
334 vuser->server_info->sanitized_username,
335 vuser->server_info->unix_name,
336 pdb_get_domain(vuser->server_info->sam_account));
337
338 return vuser->vuid;
339
340 fail:
341
342 if (vuser) {
343 invalidate_vuid(sconn, vuid);
344 }
345 return UID_FIELD_INVALID;
346}
347
348/****************************************************************************
349 Add a name to the session users list.
350****************************************************************************/
351
352void add_session_user(struct smbd_server_connection *sconn,
353 const char *user)
354{
355 struct passwd *pw;
356 char *tmp;
357
358 pw = Get_Pwnam_alloc(talloc_tos(), user);
359
360 if (pw == NULL) {
361 return;
362 }
363
364 if (sconn->smb1.sessions.session_userlist == NULL) {
365 sconn->smb1.sessions.session_userlist = SMB_STRDUP(pw->pw_name);
366 goto done;
367 }
368
369 if (in_list(pw->pw_name,sconn->smb1.sessions.session_userlist,false)) {
370 goto done;
371 }
372
373 if (strlen(sconn->smb1.sessions.session_userlist) > 128 * 1024) {
374 DEBUG(3,("add_session_user: session userlist already "
375 "too large.\n"));
376 goto done;
377 }
378
379 if (asprintf(&tmp, "%s %s",
380 sconn->smb1.sessions.session_userlist, pw->pw_name) == -1) {
381 DEBUG(3, ("asprintf failed\n"));
382 goto done;
383 }
384
385 SAFE_FREE(sconn->smb1.sessions.session_userlist);
386 sconn->smb1.sessions.session_userlist = tmp;
387 done:
388 TALLOC_FREE(pw);
389}
390
391/****************************************************************************
392 In security=share mode we need to store the client workgroup, as that's
393 what Vista uses for the NTLMv2 calculation.
394****************************************************************************/
395
396void add_session_workgroup(struct smbd_server_connection *sconn,
397 const char *workgroup)
398{
399 if (sconn->smb1.sessions.session_workgroup) {
400 SAFE_FREE(sconn->smb1.sessions.session_workgroup);
401 }
402 sconn->smb1.sessions.session_workgroup = smb_xstrdup(workgroup);
403}
404
405/****************************************************************************
406 In security=share mode we need to return the client workgroup, as that's
407 what Vista uses for the NTLMv2 calculation.
408****************************************************************************/
409
410const char *get_session_workgroup(struct smbd_server_connection *sconn)
411{
412 return sconn->smb1.sessions.session_workgroup;
413}
414
415/****************************************************************************
416 Check if a user is in a netgroup user list. If at first we don't succeed,
417 try lower case.
418****************************************************************************/
419
420bool user_in_netgroup(struct smbd_server_connection *sconn,
421 const char *user, const char *ngname)
422{
423#ifdef HAVE_NETGROUP
424 fstring lowercase_user;
425
426 if (sconn->smb1.sessions.my_yp_domain == NULL) {
427 yp_get_default_domain(&sconn->smb1.sessions.my_yp_domain);
428 }
429
430 if (sconn->smb1.sessions.my_yp_domain == NULL) {
431 DEBUG(5,("Unable to get default yp domain, "
432 "let's try without specifying it\n"));
433 }
434
435 DEBUG(5,("looking for user %s of domain %s in netgroup %s\n",
436 user,
437 sconn->smb1.sessions.my_yp_domain?
438 sconn->smb1.sessions.my_yp_domain:"(ANY)",
439 ngname));
440
441 if (innetgr(ngname, NULL, user, sconn->smb1.sessions.my_yp_domain)) {
442 DEBUG(5,("user_in_netgroup: Found\n"));
443 return true;
444 }
445
446 /*
447 * Ok, innetgr is case sensitive. Try once more with lowercase
448 * just in case. Attempt to fix #703. JRA.
449 */
450 fstrcpy(lowercase_user, user);
451 strlower_m(lowercase_user);
452
453 if (strcmp(user,lowercase_user) == 0) {
454 /* user name was already lower case! */
455 return false;
456 }
457
458 DEBUG(5,("looking for user %s of domain %s in netgroup %s\n",
459 lowercase_user,
460 sconn->smb1.sessions.my_yp_domain?
461 sconn->smb1.sessions.my_yp_domain:"(ANY)",
462 ngname));
463
464 if (innetgr(ngname, NULL, lowercase_user,
465 sconn->smb1.sessions.my_yp_domain)) {
466 DEBUG(5,("user_in_netgroup: Found\n"));
467 return true;
468 }
469#endif /* HAVE_NETGROUP */
470 return false;
471}
472
473/****************************************************************************
474 Check if a user is in a user list - can check combinations of UNIX
475 and netgroup lists.
476****************************************************************************/
477
478bool user_in_list(struct smbd_server_connection *sconn,
479 const char *user,const char **list)
480{
481 if (!list || !*list)
482 return False;
483
484 DEBUG(10,("user_in_list: checking user %s in list\n", user));
485
486 while (*list) {
487
488 DEBUG(10,("user_in_list: checking user |%s| against |%s|\n",
489 user, *list));
490
491 /*
492 * Check raw username.
493 */
494 if (strequal(user, *list))
495 return(True);
496
497 /*
498 * Now check to see if any combination
499 * of UNIX and netgroups has been specified.
500 */
501
502 if(**list == '@') {
503 /*
504 * Old behaviour. Check netgroup list
505 * followed by UNIX list.
506 */
507 if(user_in_netgroup(sconn, user, *list +1))
508 return True;
509 if(user_in_group(user, *list +1))
510 return True;
511 } else if (**list == '+') {
512
513 if((*(*list +1)) == '&') {
514 /*
515 * Search UNIX list followed by netgroup.
516 */
517 if(user_in_group(user, *list +2))
518 return True;
519 if(user_in_netgroup(sconn, user, *list +2))
520 return True;
521
522 } else {
523
524 /*
525 * Just search UNIX list.
526 */
527
528 if(user_in_group(user, *list +1))
529 return True;
530 }
531
532 } else if (**list == '&') {
533
534 if(*(*list +1) == '+') {
535 /*
536 * Search netgroup list followed by UNIX list.
537 */
538 if(user_in_netgroup(sconn, user, *list +2))
539 return True;
540 if(user_in_group(user, *list +2))
541 return True;
542 } else {
543 /*
544 * Just search netgroup list.
545 */
546 if(user_in_netgroup(sconn, user, *list +1))
547 return True;
548 }
549 }
550
551 list++;
552 }
553 return(False);
554}
555
556/****************************************************************************
557 Check if a username is valid.
558****************************************************************************/
559
560static bool user_ok(struct smbd_server_connection *sconn,
561 const char *user, int snum)
562{
563 bool ret;
564
565 ret = True;
566
567 if (lp_invalid_users(snum)) {
568 char **invalid = str_list_copy(talloc_tos(),
569 lp_invalid_users(snum));
570 if (invalid &&
571 str_list_substitute(invalid, "%S", lp_servicename(snum))) {
572
573 /* This is used in sec=share only, so no current user
574 * around to pass to str_list_sub_basic() */
575
576 if ( invalid && str_list_sub_basic(invalid, "", "") ) {
577 ret = !user_in_list(sconn, user,
578 (const char **)invalid);
579 }
580 }
581 TALLOC_FREE(invalid);
582 }
583
584 if (ret && lp_valid_users(snum)) {
585 char **valid = str_list_copy(talloc_tos(),
586 lp_valid_users(snum));
587 if ( valid &&
588 str_list_substitute(valid, "%S", lp_servicename(snum)) ) {
589
590 /* This is used in sec=share only, so no current user
591 * around to pass to str_list_sub_basic() */
592
593 if ( valid && str_list_sub_basic(valid, "", "") ) {
594 ret = user_in_list(sconn, user,
595 (const char **)valid);
596 }
597 }
598 TALLOC_FREE(valid);
599 }
600
601 if (ret && lp_onlyuser(snum)) {
602 char **user_list = str_list_make_v3(
603 talloc_tos(), lp_username(snum), NULL);
604 if (user_list &&
605 str_list_substitute(user_list, "%S",
606 lp_servicename(snum))) {
607 ret = user_in_list(sconn, user,
608 (const char **)user_list);
609 }
610 TALLOC_FREE(user_list);
611 }
612
613 return(ret);
614}
615
616/****************************************************************************
617 Validate a group username entry. Return the username or NULL.
618****************************************************************************/
619
620static char *validate_group(struct smbd_server_connection *sconn,
621 char *group, DATA_BLOB password,int snum)
622{
623#ifdef HAVE_NETGROUP
624 {
625 char *host, *user, *domain;
626 struct auth_context *actx = sconn->smb1.negprot.auth_context;
627 bool enc = sconn->smb1.negprot.encrypted_passwords;
628 setnetgrent(group);
629 while (getnetgrent(&host, &user, &domain)) {
630 if (user) {
631 if (user_ok(sconn, user, snum) &&
632 password_ok(actx, enc,
633 get_session_workgroup(sconn),
634 user,password)) {
635 endnetgrent();
636 return(user);
637 }
638 }
639 }
640 endnetgrent();
641 }
642#endif
643
644#ifdef HAVE_GETGRENT
645 {
646 struct group *gptr;
647 struct auth_context *actx = sconn->smb1.negprot.auth_context;
648 bool enc = sconn->smb1.negprot.encrypted_passwords;
649
650 setgrent();
651 while ((gptr = (struct group *)getgrent())) {
652 if (strequal(gptr->gr_name,group))
653 break;
654 }
655
656 /*
657 * As user_ok can recurse doing a getgrent(), we must
658 * copy the member list onto the heap before
659 * use. Bug pointed out by leon@eatworms.swmed.edu.
660 */
661
662 if (gptr) {
663 char *member_list = NULL;
664 size_t list_len = 0;
665 char *member;
666 int i;
667
668 for(i = 0; gptr->gr_mem && gptr->gr_mem[i]; i++) {
669 list_len += strlen(gptr->gr_mem[i])+1;
670 }
671 list_len++;
672
673 member_list = (char *)SMB_MALLOC(list_len);
674 if (!member_list) {
675 endgrent();
676 return NULL;
677 }
678
679 *member_list = '\0';
680 member = member_list;
681
682 for(i = 0; gptr->gr_mem && gptr->gr_mem[i]; i++) {
683 size_t member_len = strlen(gptr->gr_mem[i])+1;
684
685 DEBUG(10,("validate_group: = gr_mem = "
686 "%s\n", gptr->gr_mem[i]));
687
688 safe_strcpy(member, gptr->gr_mem[i],
689 list_len - (member-member_list));
690 member += member_len;
691 }
692
693 endgrent();
694
695 member = member_list;
696 while (*member) {
697 if (user_ok(sconn, member,snum) &&
698 password_ok(actx, enc,
699 get_session_workgroup(sconn),
700 member,password)) {
701 char *name = talloc_strdup(talloc_tos(),
702 member);
703 SAFE_FREE(member_list);
704 return name;
705 }
706
707 DEBUG(10,("validate_group = member = %s\n",
708 member));
709
710 member += strlen(member) + 1;
711 }
712
713 SAFE_FREE(member_list);
714 } else {
715 endgrent();
716 return NULL;
717 }
718 }
719#endif
720 return(NULL);
721}
722
723/****************************************************************************
724 Check for authority to login to a service with a given username/password.
725 Note this is *NOT* used when logging on using sessionsetup_and_X.
726****************************************************************************/
727
728bool authorise_login(struct smbd_server_connection *sconn,
729 int snum, fstring user, DATA_BLOB password,
730 bool *guest)
731{
732 bool ok = False;
733 struct auth_context *actx = sconn->smb1.negprot.auth_context;
734 bool enc = sconn->smb1.negprot.encrypted_passwords;
735
736#ifdef DEBUG_PASSWORD
737 DEBUG(100,("authorise_login: checking authorisation on "
738 "user=%s pass=%s\n", user,password.data));
739#endif
740
741 *guest = False;
742
743 /* there are several possibilities:
744 1) login as the given user with given password
745 2) login as a previously registered username with the given
746 password
747 3) login as a session list username with the given password
748 4) login as a previously validated user/password pair
749 5) login as the "user =" user with given password
750 6) login as the "user =" user with no password
751 (guest connection)
752 7) login as guest user with no password
753
754 if the service is guest_only then steps 1 to 5 are skipped
755 */
756
757 /* now check the list of session users */
758 if (!ok) {
759 char *auser;
760 char *user_list = NULL;
761 char *saveptr;
762
763 if (sconn->smb1.sessions.session_userlist)
764 user_list = SMB_STRDUP(sconn->smb1.sessions.session_userlist);
765 else
766 user_list = SMB_STRDUP("");
767
768 if (!user_list)
769 return(False);
770
771 for (auser = strtok_r(user_list, LIST_SEP, &saveptr);
772 !ok && auser;
773 auser = strtok_r(NULL, LIST_SEP, &saveptr)) {
774 fstring user2;
775 fstrcpy(user2,auser);
776 if (!user_ok(sconn,user2,snum))
777 continue;
778
779 if (password_ok(actx, enc,
780 get_session_workgroup(sconn),
781 user2,password)) {
782 ok = True;
783 fstrcpy(user,user2);
784 DEBUG(3,("authorise_login: ACCEPTED: session "
785 "list username (%s) and given "
786 "password ok\n", user));
787 }
788 }
789
790 SAFE_FREE(user_list);
791 }
792
793 /* check the user= fields and the given password */
794 if (!ok && lp_username(snum)) {
795 TALLOC_CTX *ctx = talloc_tos();
796 char *auser;
797 char *user_list = talloc_strdup(ctx, lp_username(snum));
798 char *saveptr;
799
800 if (!user_list) {
801 goto check_guest;
802 }
803
804 user_list = talloc_string_sub(ctx,
805 user_list,
806 "%S",
807 lp_servicename(snum));
808
809 if (!user_list) {
810 goto check_guest;
811 }
812
813 for (auser = strtok_r(user_list, LIST_SEP, &saveptr);
814 auser && !ok;
815 auser = strtok_r(NULL, LIST_SEP, &saveptr)) {
816 if (*auser == '@') {
817 auser = validate_group(sconn,auser+1,
818 password,snum);
819 if (auser) {
820 ok = True;
821 fstrcpy(user,auser);
822 DEBUG(3,("authorise_login: ACCEPTED: "
823 "group username and given "
824 "password ok (%s)\n", user));
825 }
826 } else {
827 fstring user2;
828 fstrcpy(user2,auser);
829 if (user_ok(sconn,user2,snum) &&
830 password_ok(actx, enc,
831 get_session_workgroup(sconn),
832 user2,password)) {
833 ok = True;
834 fstrcpy(user,user2);
835 DEBUG(3,("authorise_login: ACCEPTED: "
836 "user list username and "
837 "given password ok (%s)\n",
838 user));
839 }
840 }
841 }
842 }
843
844 check_guest:
845
846 /* check for a normal guest connection */
847 if (!ok && GUEST_OK(snum)) {
848 struct passwd *guest_pw;
849 fstring guestname;
850 fstrcpy(guestname,lp_guestaccount());
851 guest_pw = Get_Pwnam_alloc(talloc_tos(), guestname);
852 if (guest_pw != NULL) {
853 fstrcpy(user,guestname);
854 ok = True;
855 DEBUG(3,("authorise_login: ACCEPTED: guest account "
856 "and guest ok (%s)\n", user));
857 } else {
858 DEBUG(0,("authorise_login: Invalid guest account "
859 "%s??\n",guestname));
860 }
861 TALLOC_FREE(guest_pw);
862 *guest = True;
863 }
864
865 if (ok && !user_ok(sconn, user, snum)) {
866 DEBUG(0,("authorise_login: rejected invalid user %s\n",user));
867 ok = False;
868 }
869
870 return(ok);
871}
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