source: vendor/3.5.0/source3/smbd/password.c

Last change on this file was 414, checked in by Herwig Bauernfeind, 15 years ago

Samba 3.5.0: Initial import
File size: 22.3 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 = getpwnam_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 DEBUG(3, ("Adding homes service for user '%s' using home directory: "
223 "'%s'\n", username, pwd->pw_dir));
224
225 result = add_home_service(username, username, pwd->pw_dir);
226
227 TALLOC_FREE(pwd);
228 return result;
229}
230
231/**
232 * register that a valid login has been performed, establish 'session'.
233 * @param server_info The token returned from the authentication process.
234 * (now 'owned' by register_existing_vuid)
235 *
236 * @param session_key The User session key for the login session (now also
237 * 'owned' by register_existing_vuid)
238 *
239 * @param respose_blob The NT challenge-response, if available. (May be
240 * freed after this call)
241 *
242 * @param smb_name The untranslated name of the user
243 *
244 * @return Newly allocated vuid, biased by an offset. (This allows us to
245 * tell random client vuid's (normally zero) from valid vuids.)
246 *
247 */
248
249int register_existing_vuid(struct smbd_server_connection *sconn,
250 uint16 vuid,
251 auth_serversupplied_info *server_info,
252 DATA_BLOB response_blob,
253 const char *smb_name)
254{
255 fstring tmp;
256 user_struct *vuser;
257
258 vuser = get_partial_auth_user_struct(sconn, vuid);
259 if (!vuser) {
260 goto fail;
261 }
262
263 /* Use this to keep tabs on all our info from the authentication */
264 vuser->server_info = talloc_move(vuser, &server_info);
265
266 /* This is a potentially untrusted username */
267 alpha_strcpy(tmp, smb_name, ". _-$", sizeof(tmp));
268
269 vuser->server_info->sanitized_username = talloc_strdup(
270 vuser->server_info, tmp);
271
272 DEBUG(10,("register_existing_vuid: (%u,%u) %s %s %s guest=%d\n",
273 (unsigned int)vuser->server_info->utok.uid,
274 (unsigned int)vuser->server_info->utok.gid,
275 vuser->server_info->unix_name,
276 vuser->server_info->sanitized_username,
277 pdb_get_domain(vuser->server_info->sam_account),
278 vuser->server_info->guest ));
279
280 DEBUG(3, ("register_existing_vuid: User name: %s\t"
281 "Real name: %s\n", vuser->server_info->unix_name,
282 pdb_get_fullname(vuser->server_info->sam_account)));
283
284 if (!vuser->server_info->ptok) {
285 DEBUG(1, ("register_existing_vuid: server_info does not "
286 "contain a user_token - cannot continue\n"));
287 goto fail;
288 }
289
290 DEBUG(3,("register_existing_vuid: UNIX uid %d is UNIX user %s, "
291 "and will be vuid %u\n", (int)vuser->server_info->utok.uid,
292 vuser->server_info->unix_name, vuser->vuid));
293
294 if (!session_claim(vuser)) {
295 DEBUG(1, ("register_existing_vuid: Failed to claim session "
296 "for vuid=%d\n",
297 vuser->vuid));
298 goto fail;
299 }
300
301 /* Register a home dir service for this user if
302 (a) This is not a guest connection,
303 (b) we have a home directory defined
304 (c) there s not an existing static share by that name
305 If a share exists by this name (autoloaded or not) reuse it . */
306
307 vuser->homes_snum = -1;
308
309 if (!vuser->server_info->guest) {
310 vuser->homes_snum = register_homes_share(
311 vuser->server_info->unix_name);
312 }
313
314 if (srv_is_signing_negotiated(smbd_server_conn) &&
315 !vuser->server_info->guest) {
316 /* Try and turn on server signing on the first non-guest
317 * sessionsetup. */
318 srv_set_signing(smbd_server_conn,
319 vuser->server_info->user_session_key,
320 response_blob);
321 }
322
323 /* fill in the current_user_info struct */
324 set_current_user_info(
325 vuser->server_info->sanitized_username,
326 vuser->server_info->unix_name,
327 pdb_get_domain(vuser->server_info->sam_account));
328
329 return vuser->vuid;
330
331 fail:
332
333 if (vuser) {
334 invalidate_vuid(sconn, vuid);
335 }
336 return UID_FIELD_INVALID;
337}
338
339/****************************************************************************
340 Add a name to the session users list.
341****************************************************************************/
342
343void add_session_user(struct smbd_server_connection *sconn,
344 const char *user)
345{
346 struct passwd *pw;
347 char *tmp;
348
349 pw = Get_Pwnam_alloc(talloc_tos(), user);
350
351 if (pw == NULL) {
352 return;
353 }
354
355 if (sconn->smb1.sessions.session_userlist == NULL) {
356 sconn->smb1.sessions.session_userlist = SMB_STRDUP(pw->pw_name);
357 goto done;
358 }
359
360 if (in_list(pw->pw_name,sconn->smb1.sessions.session_userlist,false)) {
361 goto done;
362 }
363
364 if (strlen(sconn->smb1.sessions.session_userlist) > 128 * 1024) {
365 DEBUG(3,("add_session_user: session userlist already "
366 "too large.\n"));
367 goto done;
368 }
369
370 if (asprintf(&tmp, "%s %s",
371 sconn->smb1.sessions.session_userlist, pw->pw_name) == -1) {
372 DEBUG(3, ("asprintf failed\n"));
373 goto done;
374 }
375
376 SAFE_FREE(sconn->smb1.sessions.session_userlist);
377 sconn->smb1.sessions.session_userlist = tmp;
378 done:
379 TALLOC_FREE(pw);
380}
381
382/****************************************************************************
383 In security=share mode we need to store the client workgroup, as that's
384 what Vista uses for the NTLMv2 calculation.
385****************************************************************************/
386
387void add_session_workgroup(struct smbd_server_connection *sconn,
388 const char *workgroup)
389{
390 if (sconn->smb1.sessions.session_workgroup) {
391 SAFE_FREE(sconn->smb1.sessions.session_workgroup);
392 }
393 sconn->smb1.sessions.session_workgroup = smb_xstrdup(workgroup);
394}
395
396/****************************************************************************
397 In security=share mode we need to return the client workgroup, as that's
398 what Vista uses for the NTLMv2 calculation.
399****************************************************************************/
400
401const char *get_session_workgroup(struct smbd_server_connection *sconn)
402{
403 return sconn->smb1.sessions.session_workgroup;
404}
405
406/****************************************************************************
407 Check if a user is in a netgroup user list. If at first we don't succeed,
408 try lower case.
409****************************************************************************/
410
411bool user_in_netgroup(struct smbd_server_connection *sconn,
412 const char *user, const char *ngname)
413{
414#ifdef HAVE_NETGROUP
415 fstring lowercase_user;
416
417 if (sconn->smb1.sessions.my_yp_domain == NULL) {
418 yp_get_default_domain(&sconn->smb1.sessions.my_yp_domain);
419 }
420
421 if (sconn->smb1.sessions.my_yp_domain == NULL) {
422 DEBUG(5,("Unable to get default yp domain, "
423 "let's try without specifying it\n"));
424 }
425
426 DEBUG(5,("looking for user %s of domain %s in netgroup %s\n",
427 user,
428 sconn->smb1.sessions.my_yp_domain?
429 sconn->smb1.sessions.my_yp_domain:"(ANY)",
430 ngname));
431
432 if (innetgr(ngname, NULL, user, sconn->smb1.sessions.my_yp_domain)) {
433 DEBUG(5,("user_in_netgroup: Found\n"));
434 return true;
435 }
436
437 /*
438 * Ok, innetgr is case sensitive. Try once more with lowercase
439 * just in case. Attempt to fix #703. JRA.
440 */
441 fstrcpy(lowercase_user, user);
442 strlower_m(lowercase_user);
443
444 if (strcmp(user,lowercase_user) == 0) {
445 /* user name was already lower case! */
446 return false;
447 }
448
449 DEBUG(5,("looking for user %s of domain %s in netgroup %s\n",
450 lowercase_user,
451 sconn->smb1.sessions.my_yp_domain?
452 sconn->smb1.sessions.my_yp_domain:"(ANY)",
453 ngname));
454
455 if (innetgr(ngname, NULL, lowercase_user,
456 sconn->smb1.sessions.my_yp_domain)) {
457 DEBUG(5,("user_in_netgroup: Found\n"));
458 return true;
459 }
460#endif /* HAVE_NETGROUP */
461 return false;
462}
463
464/****************************************************************************
465 Check if a user is in a user list - can check combinations of UNIX
466 and netgroup lists.
467****************************************************************************/
468
469bool user_in_list(struct smbd_server_connection *sconn,
470 const char *user,const char **list)
471{
472 if (!list || !*list)
473 return False;
474
475 DEBUG(10,("user_in_list: checking user %s in list\n", user));
476
477 while (*list) {
478
479 DEBUG(10,("user_in_list: checking user |%s| against |%s|\n",
480 user, *list));
481
482 /*
483 * Check raw username.
484 */
485 if (strequal(user, *list))
486 return(True);
487
488 /*
489 * Now check to see if any combination
490 * of UNIX and netgroups has been specified.
491 */
492
493 if(**list == '@') {
494 /*
495 * Old behaviour. Check netgroup list
496 * followed by UNIX list.
497 */
498 if(user_in_netgroup(sconn, user, *list +1))
499 return True;
500 if(user_in_group(user, *list +1))
501 return True;
502 } else if (**list == '+') {
503
504 if((*(*list +1)) == '&') {
505 /*
506 * Search UNIX list followed by netgroup.
507 */
508 if(user_in_group(user, *list +2))
509 return True;
510 if(user_in_netgroup(sconn, user, *list +2))
511 return True;
512
513 } else {
514
515 /*
516 * Just search UNIX list.
517 */
518
519 if(user_in_group(user, *list +1))
520 return True;
521 }
522
523 } else if (**list == '&') {
524
525 if(*(*list +1) == '+') {
526 /*
527 * Search netgroup list followed by UNIX list.
528 */
529 if(user_in_netgroup(sconn, user, *list +2))
530 return True;
531 if(user_in_group(user, *list +2))
532 return True;
533 } else {
534 /*
535 * Just search netgroup list.
536 */
537 if(user_in_netgroup(sconn, user, *list +1))
538 return True;
539 }
540 }
541
542 list++;
543 }
544 return(False);
545}
546
547/****************************************************************************
548 Check if a username is valid.
549****************************************************************************/
550
551static bool user_ok(struct smbd_server_connection *sconn,
552 const char *user, int snum)
553{
554 bool ret;
555
556 ret = True;
557
558 if (lp_invalid_users(snum)) {
559 char **invalid = str_list_copy(talloc_tos(),
560 lp_invalid_users(snum));
561 if (invalid &&
562 str_list_substitute(invalid, "%S", lp_servicename(snum))) {
563
564 /* This is used in sec=share only, so no current user
565 * around to pass to str_list_sub_basic() */
566
567 if ( invalid && str_list_sub_basic(invalid, "", "") ) {
568 ret = !user_in_list(sconn, user,
569 (const char **)invalid);
570 }
571 }
572 TALLOC_FREE(invalid);
573 }
574
575 if (ret && lp_valid_users(snum)) {
576 char **valid = str_list_copy(talloc_tos(),
577 lp_valid_users(snum));
578 if ( valid &&
579 str_list_substitute(valid, "%S", lp_servicename(snum)) ) {
580
581 /* This is used in sec=share only, so no current user
582 * around to pass to str_list_sub_basic() */
583
584 if ( valid && str_list_sub_basic(valid, "", "") ) {
585 ret = user_in_list(sconn, user,
586 (const char **)valid);
587 }
588 }
589 TALLOC_FREE(valid);
590 }
591
592 if (ret && lp_onlyuser(snum)) {
593 char **user_list = str_list_make_v3(
594 talloc_tos(), lp_username(snum), NULL);
595 if (user_list &&
596 str_list_substitute(user_list, "%S",
597 lp_servicename(snum))) {
598 ret = user_in_list(sconn, user,
599 (const char **)user_list);
600 }
601 TALLOC_FREE(user_list);
602 }
603
604 return(ret);
605}
606
607/****************************************************************************
608 Validate a group username entry. Return the username or NULL.
609****************************************************************************/
610
611static char *validate_group(struct smbd_server_connection *sconn,
612 char *group, DATA_BLOB password,int snum)
613{
614#ifdef HAVE_NETGROUP
615 {
616 char *host, *user, *domain;
617 struct auth_context *actx = sconn->smb1.negprot.auth_context;
618 bool enc = sconn->smb1.negprot.encrypted_passwords;
619 setnetgrent(group);
620 while (getnetgrent(&host, &user, &domain)) {
621 if (user) {
622 if (user_ok(sconn, user, snum) &&
623 password_ok(actx, enc,
624 get_session_workgroup(sconn),
625 user,password)) {
626 endnetgrent();
627 return(user);
628 }
629 }
630 }
631 endnetgrent();
632 }
633#endif
634
635#ifdef HAVE_GETGRENT
636 {
637 struct group *gptr;
638 struct auth_context *actx = sconn->smb1.negprot.auth_context;
639 bool enc = sconn->smb1.negprot.encrypted_passwords;
640
641 setgrent();
642 while ((gptr = (struct group *)getgrent())) {
643 if (strequal(gptr->gr_name,group))
644 break;
645 }
646
647 /*
648 * As user_ok can recurse doing a getgrent(), we must
649 * copy the member list onto the heap before
650 * use. Bug pointed out by leon@eatworms.swmed.edu.
651 */
652
653 if (gptr) {
654 char *member_list = NULL;
655 size_t list_len = 0;
656 char *member;
657 int i;
658
659 for(i = 0; gptr->gr_mem && gptr->gr_mem[i]; i++) {
660 list_len += strlen(gptr->gr_mem[i])+1;
661 }
662 list_len++;
663
664 member_list = (char *)SMB_MALLOC(list_len);
665 if (!member_list) {
666 endgrent();
667 return NULL;
668 }
669
670 *member_list = '\0';
671 member = member_list;
672
673 for(i = 0; gptr->gr_mem && gptr->gr_mem[i]; i++) {
674 size_t member_len = strlen(gptr->gr_mem[i])+1;
675
676 DEBUG(10,("validate_group: = gr_mem = "
677 "%s\n", gptr->gr_mem[i]));
678
679 safe_strcpy(member, gptr->gr_mem[i],
680 list_len - (member-member_list));
681 member += member_len;
682 }
683
684 endgrent();
685
686 member = member_list;
687 while (*member) {
688 if (user_ok(sconn, member,snum) &&
689 password_ok(actx, enc,
690 get_session_workgroup(sconn),
691 member,password)) {
692 char *name = talloc_strdup(talloc_tos(),
693 member);
694 SAFE_FREE(member_list);
695 return name;
696 }
697
698 DEBUG(10,("validate_group = member = %s\n",
699 member));
700
701 member += strlen(member) + 1;
702 }
703
704 SAFE_FREE(member_list);
705 } else {
706 endgrent();
707 return NULL;
708 }
709 }
710#endif
711 return(NULL);
712}
713
714/****************************************************************************
715 Check for authority to login to a service with a given username/password.
716 Note this is *NOT* used when logging on using sessionsetup_and_X.
717****************************************************************************/
718
719bool authorise_login(struct smbd_server_connection *sconn,
720 int snum, fstring user, DATA_BLOB password,
721 bool *guest)
722{
723 bool ok = False;
724 struct auth_context *actx = sconn->smb1.negprot.auth_context;
725 bool enc = sconn->smb1.negprot.encrypted_passwords;
726
727#ifdef DEBUG_PASSWORD
728 DEBUG(100,("authorise_login: checking authorisation on "
729 "user=%s pass=%s\n", user,password.data));
730#endif
731
732 *guest = False;
733
734 /* there are several possibilities:
735 1) login as the given user with given password
736 2) login as a previously registered username with the given
737 password
738 3) login as a session list username with the given password
739 4) login as a previously validated user/password pair
740 5) login as the "user =" user with given password
741 6) login as the "user =" user with no password
742 (guest connection)
743 7) login as guest user with no password
744
745 if the service is guest_only then steps 1 to 5 are skipped
746 */
747
748 /* now check the list of session users */
749 if (!ok) {
750 char *auser;
751 char *user_list = NULL;
752 char *saveptr;
753
754 if (sconn->smb1.sessions.session_userlist)
755 user_list = SMB_STRDUP(sconn->smb1.sessions.session_userlist);
756 else
757 user_list = SMB_STRDUP("");
758
759 if (!user_list)
760 return(False);
761
762 for (auser = strtok_r(user_list, LIST_SEP, &saveptr);
763 !ok && auser;
764 auser = strtok_r(NULL, LIST_SEP, &saveptr)) {
765 fstring user2;
766 fstrcpy(user2,auser);
767 if (!user_ok(sconn,user2,snum))
768 continue;
769
770 if (password_ok(actx, enc,
771 get_session_workgroup(sconn),
772 user2,password)) {
773 ok = True;
774 fstrcpy(user,user2);
775 DEBUG(3,("authorise_login: ACCEPTED: session "
776 "list username (%s) and given "
777 "password ok\n", user));
778 }
779 }
780
781 SAFE_FREE(user_list);
782 }
783
784 /* check the user= fields and the given password */
785 if (!ok && lp_username(snum)) {
786 TALLOC_CTX *ctx = talloc_tos();
787 char *auser;
788 char *user_list = talloc_strdup(ctx, lp_username(snum));
789 char *saveptr;
790
791 if (!user_list) {
792 goto check_guest;
793 }
794
795 user_list = talloc_string_sub(ctx,
796 user_list,
797 "%S",
798 lp_servicename(snum));
799
800 if (!user_list) {
801 goto check_guest;
802 }
803
804 for (auser = strtok_r(user_list, LIST_SEP, &saveptr);
805 auser && !ok;
806 auser = strtok_r(NULL, LIST_SEP, &saveptr)) {
807 if (*auser == '@') {
808 auser = validate_group(sconn,auser+1,
809 password,snum);
810 if (auser) {
811 ok = True;
812 fstrcpy(user,auser);
813 DEBUG(3,("authorise_login: ACCEPTED: "
814 "group username and given "
815 "password ok (%s)\n", user));
816 }
817 } else {
818 fstring user2;
819 fstrcpy(user2,auser);
820 if (user_ok(sconn,user2,snum) &&
821 password_ok(actx, enc,
822 get_session_workgroup(sconn),
823 user2,password)) {
824 ok = True;
825 fstrcpy(user,user2);
826 DEBUG(3,("authorise_login: ACCEPTED: "
827 "user list username and "
828 "given password ok (%s)\n",
829 user));
830 }
831 }
832 }
833 }
834
835 check_guest:
836
837 /* check for a normal guest connection */
838 if (!ok && GUEST_OK(snum)) {
839 struct passwd *guest_pw;
840 fstring guestname;
841 fstrcpy(guestname,lp_guestaccount());
842 guest_pw = Get_Pwnam_alloc(talloc_tos(), guestname);
843 if (guest_pw != NULL) {
844 fstrcpy(user,guestname);
845 ok = True;
846 DEBUG(3,("authorise_login: ACCEPTED: guest account "
847 "and guest ok (%s)\n", user));
848 } else {
849 DEBUG(0,("authorise_login: Invalid guest account "
850 "%s??\n",guestname));
851 }
852 TALLOC_FREE(guest_pw);
853 *guest = True;
854 }
855
856 if (ok && !user_ok(sconn, user, snum)) {
857 DEBUG(0,("authorise_login: rejected invalid user %s\n",user));
858 ok = False;
859 }
860
861 return(ok);
862}
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