"userdom_struct" does not need "full_name" anymore -- unused
[samba.git] / source3 / smbd / password.c
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
24 enum server_allocated_state { SERVER_ALLOCATED_REQUIRED_YES,
25                                 SERVER_ALLOCATED_REQUIRED_NO,
26                                 SERVER_ALLOCATED_REQUIRED_ANY};
27
28 static user_struct *get_valid_user_struct_internal(uint16 vuid,
29                         enum server_allocated_state server_allocated)
30 {
31         user_struct *usp;
32         int count=0;
33
34         if (vuid == UID_FIELD_INVALID)
35                 return NULL;
36
37         for (usp=validated_users;usp;usp=usp->next,count++) {
38                 if (vuid == usp->vuid) {
39                         switch (server_allocated) {
40                                 case SERVER_ALLOCATED_REQUIRED_YES:
41                                         if (usp->server_info == NULL) {
42                                                 continue;
43                                         }
44                                         break;
45                                 case SERVER_ALLOCATED_REQUIRED_NO:
46                                         if (usp->server_info != NULL) {
47                                                 continue;
48                                         }
49                                 case SERVER_ALLOCATED_REQUIRED_ANY:
50                                         break;
51                         }
52                         if (count > 10) {
53                                 DLIST_PROMOTE(validated_users, usp);
54                         }
55                         return usp;
56                 }
57         }
58
59         return NULL;
60 }
61
62 /****************************************************************************
63  Check if a uid has been validated, and return an pointer to the user_struct
64  if it has. NULL if not. vuid is biased by an offset. This allows us to
65  tell random client vuid's (normally zero) from valid vuids.
66 ****************************************************************************/
67
68 user_struct *get_valid_user_struct(uint16 vuid)
69 {
70         return get_valid_user_struct_internal(vuid,
71                         SERVER_ALLOCATED_REQUIRED_YES);
72 }
73
74 bool is_partial_auth_vuid(uint16 vuid)
75 {
76         return (get_partial_auth_user_struct(vuid) != NULL);
77 }
78
79 /****************************************************************************
80  Get the user struct of a partial NTLMSSP login
81 ****************************************************************************/
82
83 user_struct *get_partial_auth_user_struct(uint16 vuid)
84 {
85         return get_valid_user_struct_internal(vuid,
86                         SERVER_ALLOCATED_REQUIRED_NO);
87 }
88
89 /****************************************************************************
90  Invalidate a uid.
91 ****************************************************************************/
92
93 void invalidate_vuid(uint16 vuid)
94 {
95         user_struct *vuser = NULL;
96
97         vuser = get_valid_user_struct_internal(vuid,
98                         SERVER_ALLOCATED_REQUIRED_ANY);
99         if (vuser == NULL) {
100                 return;
101         }
102
103         session_yield(vuser);
104
105         if (vuser->auth_ntlmssp_state) {
106                 auth_ntlmssp_end(&vuser->auth_ntlmssp_state);
107         }
108
109         DLIST_REMOVE(validated_users, vuser);
110
111         /* clear the vuid from the 'cache' on each connection, and
112            from the vuid 'owner' of connections */
113         conn_clear_vuid_caches(vuid);
114
115         TALLOC_FREE(vuser);
116         num_validated_vuids--;
117 }
118
119 /****************************************************************************
120  Invalidate all vuid entries for this process.
121 ****************************************************************************/
122
123 void invalidate_all_vuids(void)
124 {
125         while (validated_users != NULL) {
126                 invalidate_vuid(validated_users->vuid);
127         }
128 }
129
130 static void increment_next_vuid(uint16_t *vuid)
131 {
132         *vuid += 1;
133
134         /* Check for vuid wrap. */
135         if (*vuid == UID_FIELD_INVALID) {
136                 *vuid = VUID_OFFSET;
137         }
138 }
139
140 /****************************************************
141  Create a new partial auth user struct.
142 *****************************************************/
143
144 int register_initial_vuid(void)
145 {
146         user_struct *vuser;
147
148         /* Paranoia check. */
149         if(lp_security() == SEC_SHARE) {
150                 smb_panic("register_initial_vuid: "
151                         "Tried to register uid in security=share");
152         }
153
154         /* Limit allowed vuids to 16bits - VUID_OFFSET. */
155         if (num_validated_vuids >= 0xFFFF-VUID_OFFSET) {
156                 return UID_FIELD_INVALID;
157         }
158
159         if((vuser = talloc_zero(NULL, user_struct)) == NULL) {
160                 DEBUG(0,("register_initial_vuid: "
161                                 "Failed to talloc users struct!\n"));
162                 return UID_FIELD_INVALID;
163         }
164
165         /* Allocate a free vuid. Yes this is a linear search... */
166         while( get_valid_user_struct_internal(next_vuid,
167                         SERVER_ALLOCATED_REQUIRED_ANY) != NULL ) {
168                 increment_next_vuid(&next_vuid);
169         }
170
171         DEBUG(10,("register_initial_vuid: allocated vuid = %u\n",
172                 (unsigned int)next_vuid ));
173
174         vuser->vuid = next_vuid;
175
176         /*
177          * This happens in an unfinished NTLMSSP session setup. We
178          * need to allocate a vuid between the first and second calls
179          * to NTLMSSP.
180          */
181         increment_next_vuid(&next_vuid);
182         num_validated_vuids++;
183
184         DLIST_ADD(validated_users, vuser);
185         return vuser->vuid;
186 }
187
188 static int register_homes_share(const char *username)
189 {
190         int result;
191         struct passwd *pwd;
192
193         result = lp_servicenumber(username);
194         if (result != -1) {
195                 DEBUG(3, ("Using static (or previously created) service for "
196                           "user '%s'; path = '%s'\n", username,
197                           lp_pathname(result)));
198                 return result;
199         }
200
201         pwd = getpwnam_alloc(talloc_tos(), username);
202
203         if ((pwd == NULL) || (pwd->pw_dir[0] == '\0')) {
204                 DEBUG(3, ("No home directory defined for user '%s'\n",
205                           username));
206                 TALLOC_FREE(pwd);
207                 return -1;
208         }
209
210         DEBUG(3, ("Adding homes service for user '%s' using home directory: "
211                   "'%s'\n", username, pwd->pw_dir));
212
213         result = add_home_service(username, username, pwd->pw_dir);
214
215         TALLOC_FREE(pwd);
216         return result;
217 }
218
219 /**
220  *  register that a valid login has been performed, establish 'session'.
221  *  @param server_info The token returned from the authentication process.
222  *   (now 'owned' by register_existing_vuid)
223  *
224  *  @param session_key The User session key for the login session (now also
225  *  'owned' by register_existing_vuid)
226  *
227  *  @param respose_blob The NT challenge-response, if available.  (May be
228  *  freed after this call)
229  *
230  *  @param smb_name The untranslated name of the user
231  *
232  *  @return Newly allocated vuid, biased by an offset. (This allows us to
233  *   tell random client vuid's (normally zero) from valid vuids.)
234  *
235  */
236
237 int register_existing_vuid(uint16 vuid,
238                         auth_serversupplied_info *server_info,
239                         DATA_BLOB response_blob,
240                         const char *smb_name)
241 {
242         fstring tmp;
243         user_struct *vuser;
244
245         vuser = get_partial_auth_user_struct(vuid);
246         if (!vuser) {
247                 goto fail;
248         }
249
250         /* Use this to keep tabs on all our info from the authentication */
251         vuser->server_info = talloc_move(vuser, &server_info);
252
253         /* This is a potentially untrusted username */
254         alpha_strcpy(tmp, smb_name, ". _-$", sizeof(tmp));
255
256         vuser->server_info->sanitized_username = talloc_strdup(
257                 vuser->server_info, tmp);
258
259         DEBUG(10,("register_existing_vuid: (%u,%u) %s %s %s guest=%d\n",
260                   (unsigned int)vuser->server_info->utok.uid,
261                   (unsigned int)vuser->server_info->utok.gid,
262                   vuser->server_info->unix_name,
263                   vuser->server_info->sanitized_username,
264                   pdb_get_domain(vuser->server_info->sam_account),
265                   vuser->server_info->guest ));
266
267         DEBUG(3, ("register_existing_vuid: User name: %s\t"
268                   "Real name: %s\n", vuser->server_info->unix_name,
269                   pdb_get_fullname(vuser->server_info->sam_account)));
270
271         if (!vuser->server_info->ptok) {
272                 DEBUG(1, ("register_existing_vuid: server_info does not "
273                         "contain a user_token - cannot continue\n"));
274                 goto fail;
275         }
276
277         DEBUG(3,("register_existing_vuid: UNIX uid %d is UNIX user %s, "
278                 "and will be vuid %u\n", (int)vuser->server_info->utok.uid,
279                  vuser->server_info->unix_name, vuser->vuid));
280
281         if (!session_claim(vuser)) {
282                 DEBUG(1, ("register_existing_vuid: Failed to claim session "
283                         "for vuid=%d\n",
284                         vuser->vuid));
285                 goto fail;
286         }
287
288         /* Register a home dir service for this user if
289         (a) This is not a guest connection,
290         (b) we have a home directory defined
291         (c) there s not an existing static share by that name
292         If a share exists by this name (autoloaded or not) reuse it . */
293
294         vuser->homes_snum = -1;
295
296         if (!vuser->server_info->guest) {
297                 vuser->homes_snum = register_homes_share(
298                         vuser->server_info->unix_name);
299         }
300
301         if (srv_is_signing_negotiated() && !vuser->server_info->guest &&
302                         !srv_signing_started()) {
303                 /* Try and turn on server signing on the first non-guest
304                  * sessionsetup. */
305                 srv_set_signing(vuser->server_info->user_session_key, response_blob);
306         }
307
308         /* fill in the current_user_info struct */
309         set_current_user_info(
310                 vuser->server_info->sanitized_username,
311                 vuser->server_info->unix_name,
312                 pdb_get_domain(vuser->server_info->sam_account));
313
314         return vuser->vuid;
315
316   fail:
317
318         if (vuser) {
319                 invalidate_vuid(vuid);
320         }
321         return UID_FIELD_INVALID;
322 }
323
324 /****************************************************************************
325  Add a name to the session users list.
326 ****************************************************************************/
327
328 void add_session_user(const char *user)
329 {
330         struct passwd *pw;
331         char *tmp;
332
333         pw = Get_Pwnam_alloc(talloc_tos(), user);
334
335         if (pw == NULL) {
336                 return;
337         }
338
339         if (session_userlist == NULL) {
340                 session_userlist = SMB_STRDUP(pw->pw_name);
341                 goto done;
342         }
343
344         if (in_list(pw->pw_name,session_userlist,False) ) {
345                 goto done;
346         }
347
348         if (strlen(session_userlist) > 128 * 1024) {
349                 DEBUG(3,("add_session_user: session userlist already "
350                          "too large.\n"));
351                 goto done;
352         }
353
354         if (asprintf(&tmp, "%s %s", session_userlist, pw->pw_name) == -1) {
355                 DEBUG(3, ("asprintf failed\n"));
356                 goto done;
357         }
358
359         SAFE_FREE(session_userlist);
360         session_userlist = tmp;
361  done:
362         TALLOC_FREE(pw);
363 }
364
365 /****************************************************************************
366  In security=share mode we need to store the client workgroup, as that's
367   what Vista uses for the NTLMv2 calculation.
368 ****************************************************************************/
369
370 void add_session_workgroup(const char *workgroup)
371 {
372         if (session_workgroup) {
373                 SAFE_FREE(session_workgroup);
374         }
375         session_workgroup = smb_xstrdup(workgroup);
376 }
377
378 /****************************************************************************
379  In security=share mode we need to return the client workgroup, as that's
380   what Vista uses for the NTLMv2 calculation.
381 ****************************************************************************/
382
383 const char *get_session_workgroup(void)
384 {
385         return session_workgroup;
386 }
387
388 /****************************************************************************
389  Check if a user is in a netgroup user list. If at first we don't succeed,
390  try lower case.
391 ****************************************************************************/
392
393 bool user_in_netgroup(const char *user, const char *ngname)
394 {
395 #ifdef HAVE_NETGROUP
396         fstring lowercase_user;
397
398         if (my_yp_domain == NULL)
399                 yp_get_default_domain(&my_yp_domain);
400
401         if(my_yp_domain == NULL) {
402                 DEBUG(5,("Unable to get default yp domain, "
403                         "let's try without specifying it\n"));
404         }
405
406         DEBUG(5,("looking for user %s of domain %s in netgroup %s\n",
407                 user, my_yp_domain?my_yp_domain:"(ANY)", ngname));
408
409         if (innetgr(ngname, NULL, user, my_yp_domain)) {
410                 DEBUG(5,("user_in_netgroup: Found\n"));
411                 return (True);
412         } else {
413
414                 /*
415                  * Ok, innetgr is case sensitive. Try once more with lowercase
416                  * just in case. Attempt to fix #703. JRA.
417                  */
418
419                 fstrcpy(lowercase_user, user);
420                 strlower_m(lowercase_user);
421
422                 DEBUG(5,("looking for user %s of domain %s in netgroup %s\n",
423                         lowercase_user, my_yp_domain?my_yp_domain:"(ANY)", ngname));
424
425                 if (innetgr(ngname, NULL, lowercase_user, my_yp_domain)) {
426                         DEBUG(5,("user_in_netgroup: Found\n"));
427                         return (True);
428                 }
429         }
430 #endif /* HAVE_NETGROUP */
431         return False;
432 }
433
434 /****************************************************************************
435  Check if a user is in a user list - can check combinations of UNIX
436  and netgroup lists.
437 ****************************************************************************/
438
439 bool user_in_list(const char *user,const char **list)
440 {
441         if (!list || !*list)
442                 return False;
443
444         DEBUG(10,("user_in_list: checking user %s in list\n", user));
445
446         while (*list) {
447
448                 DEBUG(10,("user_in_list: checking user |%s| against |%s|\n",
449                           user, *list));
450
451                 /*
452                  * Check raw username.
453                  */
454                 if (strequal(user, *list))
455                         return(True);
456
457                 /*
458                  * Now check to see if any combination
459                  * of UNIX and netgroups has been specified.
460                  */
461
462                 if(**list == '@') {
463                         /*
464                          * Old behaviour. Check netgroup list
465                          * followed by UNIX list.
466                          */
467                         if(user_in_netgroup(user, *list +1))
468                                 return True;
469                         if(user_in_group(user, *list +1))
470                                 return True;
471                 } else if (**list == '+') {
472
473                         if((*(*list +1)) == '&') {
474                                 /*
475                                  * Search UNIX list followed by netgroup.
476                                  */
477                                 if(user_in_group(user, *list +2))
478                                         return True;
479                                 if(user_in_netgroup(user, *list +2))
480                                         return True;
481
482                         } else {
483
484                                 /*
485                                  * Just search UNIX list.
486                                  */
487
488                                 if(user_in_group(user, *list +1))
489                                         return True;
490                         }
491
492                 } else if (**list == '&') {
493
494                         if(*(*list +1) == '+') {
495                                 /*
496                                  * Search netgroup list followed by UNIX list.
497                                  */
498                                 if(user_in_netgroup(user, *list +2))
499                                         return True;
500                                 if(user_in_group(user, *list +2))
501                                         return True;
502                         } else {
503                                 /*
504                                  * Just search netgroup list.
505                                  */
506                                 if(user_in_netgroup(user, *list +1))
507                                         return True;
508                         }
509                 }
510
511                 list++;
512         }
513         return(False);
514 }
515
516 /****************************************************************************
517  Check if a username is valid.
518 ****************************************************************************/
519
520 static bool user_ok(const char *user, int snum)
521 {
522         char **valid, **invalid;
523         bool ret;
524
525         valid = invalid = NULL;
526         ret = True;
527
528         if (lp_invalid_users(snum)) {
529                 invalid = str_list_copy(talloc_tos(), lp_invalid_users(snum));
530                 if (invalid &&
531                     str_list_substitute(invalid, "%S", lp_servicename(snum))) {
532
533                         /* This is used in sec=share only, so no current user
534                          * around to pass to str_list_sub_basic() */
535
536                         if ( invalid && str_list_sub_basic(invalid, "", "") ) {
537                                 ret = !user_in_list(user,
538                                                     (const char **)invalid);
539                         }
540                 }
541         }
542         TALLOC_FREE(invalid);
543
544         if (ret && lp_valid_users(snum)) {
545                 valid = str_list_copy(talloc_tos(), lp_valid_users(snum));
546                 if ( valid &&
547                      str_list_substitute(valid, "%S", lp_servicename(snum)) ) {
548
549                         /* This is used in sec=share only, so no current user
550                          * around to pass to str_list_sub_basic() */
551
552                         if ( valid && str_list_sub_basic(valid, "", "") ) {
553                                 ret = user_in_list(user, (const char **)valid);
554                         }
555                 }
556         }
557         TALLOC_FREE(valid);
558
559         if (ret && lp_onlyuser(snum)) {
560                 char **user_list = str_list_make_v3(
561                         talloc_tos(), lp_username(snum), NULL);
562                 if (user_list &&
563                     str_list_substitute(user_list, "%S",
564                                         lp_servicename(snum))) {
565                         ret = user_in_list(user, (const char **)user_list);
566                 }
567                 TALLOC_FREE(user_list);
568         }
569
570         return(ret);
571 }
572
573 /****************************************************************************
574  Validate a group username entry. Return the username or NULL.
575 ****************************************************************************/
576
577 static char *validate_group(char *group, DATA_BLOB password,int snum)
578 {
579 #ifdef HAVE_NETGROUP
580         {
581                 char *host, *user, *domain;
582                 setnetgrent(group);
583                 while (getnetgrent(&host, &user, &domain)) {
584                         if (user) {
585                                 if (user_ok(user, snum) && 
586                                     password_ok(user,password)) {
587                                         endnetgrent();
588                                         return(user);
589                                 }
590                         }
591                 }
592                 endnetgrent();
593         }
594 #endif
595
596 #ifdef HAVE_GETGRENT
597         {
598                 struct group *gptr;
599                 setgrent();
600                 while ((gptr = (struct group *)getgrent())) {
601                         if (strequal(gptr->gr_name,group))
602                                 break;
603                 }
604
605                 /*
606                  * As user_ok can recurse doing a getgrent(), we must
607                  * copy the member list onto the heap before
608                  * use. Bug pointed out by leon@eatworms.swmed.edu.
609                  */
610
611                 if (gptr) {
612                         char *member_list = NULL;
613                         size_t list_len = 0;
614                         char *member;
615                         int i;
616
617                         for(i = 0; gptr->gr_mem && gptr->gr_mem[i]; i++) {
618                                 list_len += strlen(gptr->gr_mem[i])+1;
619                         }
620                         list_len++;
621
622                         member_list = (char *)SMB_MALLOC(list_len);
623                         if (!member_list) {
624                                 endgrent();
625                                 return NULL;
626                         }
627
628                         *member_list = '\0';
629                         member = member_list;
630
631                         for(i = 0; gptr->gr_mem && gptr->gr_mem[i]; i++) {
632                                 size_t member_len = strlen(gptr->gr_mem[i])+1;
633
634                                 DEBUG(10,("validate_group: = gr_mem = "
635                                           "%s\n", gptr->gr_mem[i]));
636
637                                 safe_strcpy(member, gptr->gr_mem[i],
638                                         list_len - (member-member_list));
639                                 member += member_len;
640                         }
641
642                         endgrent();
643
644                         member = member_list;
645                         while (*member) {
646                                 if (user_ok(member,snum) &&
647                                     password_ok(member,password)) {
648                                         char *name = talloc_strdup(talloc_tos(),
649                                                                 member);
650                                         SAFE_FREE(member_list);
651                                         return name;
652                                 }
653
654                                 DEBUG(10,("validate_group = member = %s\n",
655                                           member));
656
657                                 member += strlen(member) + 1;
658                         }
659
660                         SAFE_FREE(member_list);
661                 } else {
662                         endgrent();
663                         return NULL;
664                 }
665         }
666 #endif
667         return(NULL);
668 }
669
670 /****************************************************************************
671  Check for authority to login to a service with a given username/password.
672  Note this is *NOT* used when logging on using sessionsetup_and_X.
673 ****************************************************************************/
674
675 bool authorise_login(int snum, fstring user, DATA_BLOB password,
676                      bool *guest)
677 {
678         bool ok = False;
679
680 #ifdef DEBUG_PASSWORD
681         DEBUG(100,("authorise_login: checking authorisation on "
682                    "user=%s pass=%s\n", user,password.data));
683 #endif
684
685         *guest = False;
686
687         /* there are several possibilities:
688                 1) login as the given user with given password
689                 2) login as a previously registered username with the given
690                    password
691                 3) login as a session list username with the given password
692                 4) login as a previously validated user/password pair
693                 5) login as the "user =" user with given password
694                 6) login as the "user =" user with no password
695                    (guest connection)
696                 7) login as guest user with no password
697
698                 if the service is guest_only then steps 1 to 5 are skipped
699         */
700
701         /* now check the list of session users */
702         if (!ok) {
703                 char *auser;
704                 char *user_list = NULL;
705                 char *saveptr;
706
707                 if ( session_userlist )
708                         user_list = SMB_STRDUP(session_userlist);
709                 else
710                         user_list = SMB_STRDUP("");
711
712                 if (!user_list)
713                         return(False);
714
715                 for (auser = strtok_r(user_list, LIST_SEP, &saveptr);
716                      !ok && auser;
717                      auser = strtok_r(NULL, LIST_SEP, &saveptr)) {
718                         fstring user2;
719                         fstrcpy(user2,auser);
720                         if (!user_ok(user2,snum))
721                                 continue;
722
723                         if (password_ok(user2,password)) {
724                                 ok = True;
725                                 fstrcpy(user,user2);
726                                 DEBUG(3,("authorise_login: ACCEPTED: session "
727                                          "list username (%s) and given "
728                                          "password ok\n", user));
729                         }
730                 }
731
732                 SAFE_FREE(user_list);
733         }
734
735         /* check the user= fields and the given password */
736         if (!ok && lp_username(snum)) {
737                 TALLOC_CTX *ctx = talloc_tos();
738                 char *auser;
739                 char *user_list = talloc_strdup(ctx, lp_username(snum));
740                 char *saveptr;
741
742                 if (!user_list) {
743                         goto check_guest;
744                 }
745
746                 user_list = talloc_string_sub(ctx,
747                                 user_list,
748                                 "%S",
749                                 lp_servicename(snum));
750
751                 if (!user_list) {
752                         goto check_guest;
753                 }
754
755                 for (auser = strtok_r(user_list, LIST_SEP, &saveptr);
756                      auser && !ok;
757                      auser = strtok_r(NULL, LIST_SEP, &saveptr)) {
758                         if (*auser == '@') {
759                                 auser = validate_group(auser+1,password,snum);
760                                 if (auser) {
761                                         ok = True;
762                                         fstrcpy(user,auser);
763                                         DEBUG(3,("authorise_login: ACCEPTED: "
764                                                  "group username and given "
765                                                  "password ok (%s)\n", user));
766                                 }
767                         } else {
768                                 fstring user2;
769                                 fstrcpy(user2,auser);
770                                 if (user_ok(user2,snum) &&
771                                     password_ok(user2,password)) {
772                                         ok = True;
773                                         fstrcpy(user,user2);
774                                         DEBUG(3,("authorise_login: ACCEPTED: "
775                                                  "user list username and "
776                                                  "given password ok (%s)\n",
777                                                  user));
778                                 }
779                         }
780                 }
781         }
782
783   check_guest:
784
785         /* check for a normal guest connection */
786         if (!ok && GUEST_OK(snum)) {
787                 struct passwd *guest_pw;
788                 fstring guestname;
789                 fstrcpy(guestname,lp_guestaccount());
790                 guest_pw = Get_Pwnam_alloc(talloc_tos(), guestname);
791                 if (guest_pw != NULL) {
792                         fstrcpy(user,guestname);
793                         ok = True;
794                         DEBUG(3,("authorise_login: ACCEPTED: guest account "
795                                  "and guest ok (%s)\n", user));
796                 } else {
797                         DEBUG(0,("authorise_login: Invalid guest account "
798                                  "%s??\n",guestname));
799                 }
800                 TALLOC_FREE(guest_pw);
801                 *guest = True;
802         }
803
804         if (ok && !user_ok(user, snum)) {
805                 DEBUG(0,("authorise_login: rejected invalid user %s\n",user));
806                 ok = False;
807         }
808
809         return(ok);
810 }