source: branches/samba-3.3.x/source/smbd/password.c

Last change on this file was 206, checked in by Herwig Bauernfeind, 16 years ago

Import Samba 3.3 branch at 3.0.0 level (psmedley's port)
File size: 21.7 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
23/* users from session setup */
24static char *session_userlist = NULL;
25/* workgroup from session setup. */
26static char *session_workgroup = NULL;
27
28/* this holds info on user ids that are already validated for this VC */
29static user_struct *validated_users;
30static uint16_t next_vuid = VUID_OFFSET;
31static int num_validated_vuids;
32
33enum server_allocated_state { SERVER_ALLOCATED_REQUIRED_YES,
34 SERVER_ALLOCATED_REQUIRED_NO,
35 SERVER_ALLOCATED_REQUIRED_ANY};
36
37static user_struct *get_valid_user_struct_internal(uint16 vuid,
38 enum server_allocated_state server_allocated)
39{
40 user_struct *usp;
41 int count=0;
42
43 if (vuid == UID_FIELD_INVALID)
44 return NULL;
45
46 for (usp=validated_users;usp;usp=usp->next,count++) {
47 if (vuid == usp->vuid) {
48 switch (server_allocated) {
49 case SERVER_ALLOCATED_REQUIRED_YES:
50 if (usp->server_info == NULL) {
51 continue;
52 }
53 break;
54 case SERVER_ALLOCATED_REQUIRED_NO:
55 if (usp->server_info != NULL) {
56 continue;
57 }
58 case SERVER_ALLOCATED_REQUIRED_ANY:
59 break;
60 }
61 if (count > 10) {
62 DLIST_PROMOTE(validated_users, usp);
63 }
64 return usp;
65 }
66 }
67
68 return NULL;
69}
70
71/****************************************************************************
72 Check if a uid has been validated, and return an pointer to the user_struct
73 if it has. NULL if not. vuid is biased by an offset. This allows us to
74 tell random client vuid's (normally zero) from valid vuids.
75****************************************************************************/
76
77user_struct *get_valid_user_struct(uint16 vuid)
78{
79 return get_valid_user_struct_internal(vuid,
80 SERVER_ALLOCATED_REQUIRED_YES);
81}
82
83bool is_partial_auth_vuid(uint16 vuid)
84{
85 if (vuid == UID_FIELD_INVALID) {
86 return False;
87 }
88 return get_valid_user_struct_internal(vuid,
89 SERVER_ALLOCATED_REQUIRED_NO) ? True : False;
90}
91
92/****************************************************************************
93 Get the user struct of a partial NTLMSSP login
94****************************************************************************/
95
96user_struct *get_partial_auth_user_struct(uint16 vuid)
97{
98 return get_valid_user_struct_internal(vuid,
99 SERVER_ALLOCATED_REQUIRED_NO);
100}
101
102/****************************************************************************
103 Invalidate a uid.
104****************************************************************************/
105
106void invalidate_vuid(uint16 vuid)
107{
108 user_struct *vuser = NULL;
109
110 if (vuid == UID_FIELD_INVALID) {
111 return;
112 }
113
114 vuser = get_valid_user_struct_internal(vuid,
115 SERVER_ALLOCATED_REQUIRED_ANY);
116 if (vuser == NULL) {
117 return;
118 }
119
120 session_yield(vuser);
121
122 if (vuser->auth_ntlmssp_state) {
123 auth_ntlmssp_end(&vuser->auth_ntlmssp_state);
124 }
125
126 DLIST_REMOVE(validated_users, vuser);
127
128 /* clear the vuid from the 'cache' on each connection, and
129 from the vuid 'owner' of connections */
130 conn_clear_vuid_caches(vuid);
131
132 TALLOC_FREE(vuser);
133 num_validated_vuids--;
134}
135
136/****************************************************************************
137 Invalidate all vuid entries for this process.
138****************************************************************************/
139
140void invalidate_all_vuids(void)
141{
142 user_struct *usp, *next=NULL;
143
144 for (usp=validated_users;usp;usp=next) {
145 next = usp->next;
146 invalidate_vuid(usp->vuid);
147 }
148}
149
150static void increment_next_vuid(uint16_t *vuid)
151{
152 *vuid += 1;
153
154 /* Check for vuid wrap. */
155 if (*vuid == UID_FIELD_INVALID) {
156 *vuid = VUID_OFFSET;
157 }
158}
159
160/****************************************************
161 Create a new partial auth user struct.
162*****************************************************/
163
164int register_initial_vuid(void)
165{
166 user_struct *vuser;
167
168 /* Paranoia check. */
169 if(lp_security() == SEC_SHARE) {
170 smb_panic("register_initial_vuid: "
171 "Tried to register uid in security=share");
172 }
173
174 /* Limit allowed vuids to 16bits - VUID_OFFSET. */
175 if (num_validated_vuids >= 0xFFFF-VUID_OFFSET) {
176 return UID_FIELD_INVALID;
177 }
178
179 if((vuser = talloc_zero(NULL, user_struct)) == NULL) {
180 DEBUG(0,("register_initial_vuid: "
181 "Failed to talloc users struct!\n"));
182 return UID_FIELD_INVALID;
183 }
184
185 /* Allocate a free vuid. Yes this is a linear search... */
186 while( get_valid_user_struct_internal(next_vuid,
187 SERVER_ALLOCATED_REQUIRED_ANY) != NULL ) {
188 increment_next_vuid(&next_vuid);
189 }
190
191 DEBUG(10,("register_initial_vuid: allocated vuid = %u\n",
192 (unsigned int)next_vuid ));
193
194 vuser->vuid = next_vuid;
195
196 /*
197 * This happens in an unfinished NTLMSSP session setup. We
198 * need to allocate a vuid between the first and second calls
199 * to NTLMSSP.
200 */
201 increment_next_vuid(&next_vuid);
202 num_validated_vuids++;
203
204 DLIST_ADD(validated_users, vuser);
205 return vuser->vuid;
206}
207
208static int register_homes_share(const char *username)
209{
210 int result;
211 struct passwd *pwd;
212
213 result = lp_servicenumber(username);
214 if (result != -1) {
215 DEBUG(3, ("Using static (or previously created) service for "
216 "user '%s'; path = '%s'\n", username,
217 lp_pathname(result)));
218 return result;
219 }
220
221 pwd = getpwnam_alloc(talloc_tos(), username);
222
223 if ((pwd == NULL) || (pwd->pw_dir[0] == '\0')) {
224 DEBUG(3, ("No home directory defined for user '%s'\n",
225 username));
226 TALLOC_FREE(pwd);
227 return -1;
228 }
229#ifdef __OS2__
230 /* On OS/2 we use drive letters which have a colon. This is also the field
231 separator in master.passwd, so we use a $ instead of a colon for the drive
232 separator, ie e$/user instead of e:/user. This code simply exchanges any $
233 for a : in the user's homedir */
234 if (pwd->pw_dir[1] == '$')
235 pwd->pw_dir[1] = ':';
236#endif
237 DEBUG(3, ("Adding homes service for user '%s' using home directory: "
238 "'%s'\n", username, pwd->pw_dir));
239
240 result = add_home_service(username, username, pwd->pw_dir);
241
242 TALLOC_FREE(pwd);
243 return result;
244}
245
246/**
247 * register that a valid login has been performed, establish 'session'.
248 * @param server_info The token returned from the authentication process.
249 * (now 'owned' by register_existing_vuid)
250 *
251 * @param session_key The User session key for the login session (now also
252 * 'owned' by register_existing_vuid)
253 *
254 * @param respose_blob The NT challenge-response, if available. (May be
255 * freed after this call)
256 *
257 * @param smb_name The untranslated name of the user
258 *
259 * @return Newly allocated vuid, biased by an offset. (This allows us to
260 * tell random client vuid's (normally zero) from valid vuids.)
261 *
262 */
263
264int register_existing_vuid(uint16 vuid,
265 auth_serversupplied_info *server_info,
266 DATA_BLOB response_blob,
267 const char *smb_name)
268{
269 fstring tmp;
270 user_struct *vuser;
271
272 vuser = get_partial_auth_user_struct(vuid);
273 if (!vuser) {
274 goto fail;
275 }
276
277 /* Use this to keep tabs on all our info from the authentication */
278 vuser->server_info = talloc_move(vuser, &server_info);
279
280 /* This is a potentially untrusted username */
281 alpha_strcpy(tmp, smb_name, ". _-$", sizeof(tmp));
282
283 vuser->server_info->sanitized_username = talloc_strdup(
284 vuser->server_info, tmp);
285
286 DEBUG(10,("register_existing_vuid: (%u,%u) %s %s %s guest=%d\n",
287 (unsigned int)vuser->server_info->utok.uid,
288 (unsigned int)vuser->server_info->utok.gid,
289 vuser->server_info->unix_name,
290 vuser->server_info->sanitized_username,
291 pdb_get_domain(vuser->server_info->sam_account),
292 vuser->server_info->guest ));
293
294 DEBUG(3, ("register_existing_vuid: User name: %s\t"
295 "Real name: %s\n", vuser->server_info->unix_name,
296 pdb_get_fullname(vuser->server_info->sam_account)));
297
298 if (!vuser->server_info->ptok) {
299 DEBUG(1, ("register_existing_vuid: server_info does not "
300 "contain a user_token - cannot continue\n"));
301 goto fail;
302 }
303
304 DEBUG(3,("register_existing_vuid: UNIX uid %d is UNIX user %s, "
305 "and will be vuid %u\n", (int)vuser->server_info->utok.uid,
306 vuser->server_info->unix_name, vuser->vuid));
307
308 if (!session_claim(vuser)) {
309 DEBUG(1, ("register_existing_vuid: Failed to claim session "
310 "for vuid=%d\n",
311 vuser->vuid));
312 goto fail;
313 }
314
315 /* Register a home dir service for this user if
316 (a) This is not a guest connection,
317 (b) we have a home directory defined
318 (c) there s not an existing static share by that name
319 If a share exists by this name (autoloaded or not) reuse it . */
320
321 vuser->homes_snum = -1;
322
323 if (!vuser->server_info->guest) {
324 vuser->homes_snum = register_homes_share(
325 vuser->server_info->unix_name);
326 }
327
328 if (srv_is_signing_negotiated() && !vuser->server_info->guest &&
329 !srv_signing_started()) {
330 /* Try and turn on server signing on the first non-guest
331 * sessionsetup. */
332 srv_set_signing(vuser->server_info->user_session_key, response_blob);
333 }
334
335 /* fill in the current_user_info struct */
336 set_current_user_info(
337 vuser->server_info->sanitized_username,
338 vuser->server_info->unix_name,
339 pdb_get_fullname(vuser->server_info->sam_account),
340 pdb_get_domain(vuser->server_info->sam_account));
341
342 return vuser->vuid;
343
344 fail:
345
346 if (vuser) {
347 invalidate_vuid(vuid);
348 }
349 return UID_FIELD_INVALID;
350}
351
352/****************************************************************************
353 Add a name to the session users list.
354****************************************************************************/
355
356void add_session_user(const char *user)
357{
358 struct passwd *pw;
359 char *tmp;
360
361 pw = Get_Pwnam_alloc(talloc_tos(), user);
362
363 if (pw == NULL) {
364 return;
365 }
366
367 if (session_userlist == NULL) {
368 session_userlist = SMB_STRDUP(pw->pw_name);
369 goto done;
370 }
371
372 if (in_list(pw->pw_name,session_userlist,False) ) {
373 goto done;
374 }
375
376 if (strlen(session_userlist) > 128 * 1024) {
377 DEBUG(3,("add_session_user: session userlist already "
378 "too large.\n"));
379 goto done;
380 }
381
382 if (asprintf(&tmp, "%s %s", session_userlist, pw->pw_name) == -1) {
383 DEBUG(3, ("asprintf failed\n"));
384 goto done;
385 }
386
387 SAFE_FREE(session_userlist);
388 session_userlist = tmp;
389 done:
390 TALLOC_FREE(pw);
391}
392
393/****************************************************************************
394 In security=share mode we need to store the client workgroup, as that's
395 what Vista uses for the NTLMv2 calculation.
396****************************************************************************/
397
398void add_session_workgroup(const char *workgroup)
399{
400 if (session_workgroup) {
401 SAFE_FREE(session_workgroup);
402 }
403 session_workgroup = smb_xstrdup(workgroup);
404}
405
406/****************************************************************************
407 In security=share mode we need to return the client workgroup, as that's
408 what Vista uses for the NTLMv2 calculation.
409****************************************************************************/
410
411const char *get_session_workgroup(void)
412{
413 return session_workgroup;
414}
415
416/****************************************************************************
417 Check if a user is in a netgroup user list. If at first we don't succeed,
418 try lower case.
419****************************************************************************/
420
421bool user_in_netgroup(const char *user, const char *ngname)
422{
423#ifdef HAVE_NETGROUP
424 static char *mydomain = NULL;
425 fstring lowercase_user;
426
427 if (mydomain == NULL)
428 yp_get_default_domain(&mydomain);
429
430 if(mydomain == 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, mydomain?mydomain:"(ANY)", ngname));
437
438 if (innetgr(ngname, NULL, user, mydomain)) {
439 DEBUG(5,("user_in_netgroup: Found\n"));
440 return (True);
441 } else {
442
443 /*
444 * Ok, innetgr is case sensitive. Try once more with lowercase
445 * just in case. Attempt to fix #703. JRA.
446 */
447
448 fstrcpy(lowercase_user, user);
449 strlower_m(lowercase_user);
450
451 DEBUG(5,("looking for user %s of domain %s in netgroup %s\n",
452 lowercase_user, mydomain?mydomain:"(ANY)", ngname));
453
454 if (innetgr(ngname, NULL, lowercase_user, mydomain)) {
455 DEBUG(5,("user_in_netgroup: Found\n"));
456 return (True);
457 }
458 }
459#endif /* HAVE_NETGROUP */
460 return False;
461}
462
463/****************************************************************************
464 Check if a user is in a user list - can check combinations of UNIX
465 and netgroup lists.
466****************************************************************************/
467
468bool user_in_list(const char *user,const char **list)
469{
470 if (!list || !*list)
471 return False;
472
473 DEBUG(10,("user_in_list: checking user %s in list\n", user));
474
475 while (*list) {
476
477 DEBUG(10,("user_in_list: checking user |%s| against |%s|\n",
478 user, *list));
479
480 /*
481 * Check raw username.
482 */
483 if (strequal(user, *list))
484 return(True);
485
486 /*
487 * Now check to see if any combination
488 * of UNIX and netgroups has been specified.
489 */
490
491 if(**list == '@') {
492 /*
493 * Old behaviour. Check netgroup list
494 * followed by UNIX list.
495 */
496 if(user_in_netgroup(user, *list +1))
497 return True;
498 if(user_in_group(user, *list +1))
499 return True;
500 } else if (**list == '+') {
501
502 if((*(*list +1)) == '&') {
503 /*
504 * Search UNIX list followed by netgroup.
505 */
506 if(user_in_group(user, *list +2))
507 return True;
508 if(user_in_netgroup(user, *list +2))
509 return True;
510
511 } else {
512
513 /*
514 * Just search UNIX list.
515 */
516
517 if(user_in_group(user, *list +1))
518 return True;
519 }
520
521 } else if (**list == '&') {
522
523 if(*(*list +1) == '+') {
524 /*
525 * Search netgroup list followed by UNIX list.
526 */
527 if(user_in_netgroup(user, *list +2))
528 return True;
529 if(user_in_group(user, *list +2))
530 return True;
531 } else {
532 /*
533 * Just search netgroup list.
534 */
535 if(user_in_netgroup(user, *list +1))
536 return True;
537 }
538 }
539
540 list++;
541 }
542 return(False);
543}
544
545/****************************************************************************
546 Check if a username is valid.
547****************************************************************************/
548
549static bool user_ok(const char *user, int snum)
550{
551 char **valid, **invalid;
552 bool ret;
553
554 valid = invalid = NULL;
555 ret = True;
556
557 if (lp_invalid_users(snum)) {
558 str_list_copy(talloc_tos(), &invalid, lp_invalid_users(snum));
559 if (invalid &&
560 str_list_substitute(invalid, "%S", lp_servicename(snum))) {
561
562 /* This is used in sec=share only, so no current user
563 * around to pass to str_list_sub_basic() */
564
565 if ( invalid && str_list_sub_basic(invalid, "", "") ) {
566 ret = !user_in_list(user,
567 (const char **)invalid);
568 }
569 }
570 }
571 TALLOC_FREE(invalid);
572
573 if (ret && lp_valid_users(snum)) {
574 str_list_copy(talloc_tos(), &valid, lp_valid_users(snum));
575 if ( valid &&
576 str_list_substitute(valid, "%S", lp_servicename(snum)) ) {
577
578 /* This is used in sec=share only, so no current user
579 * around to pass to str_list_sub_basic() */
580
581 if ( valid && str_list_sub_basic(valid, "", "") ) {
582 ret = user_in_list(user, (const char **)valid);
583 }
584 }
585 }
586 TALLOC_FREE(valid);
587
588 if (ret && lp_onlyuser(snum)) {
589 char **user_list = str_list_make(
590 talloc_tos(), lp_username(snum), NULL);
591 if (user_list &&
592 str_list_substitute(user_list, "%S",
593 lp_servicename(snum))) {
594 ret = user_in_list(user, (const char **)user_list);
595 }
596 TALLOC_FREE(user_list);
597 }
598
599 return(ret);
600}
601
602/****************************************************************************
603 Validate a group username entry. Return the username or NULL.
604****************************************************************************/
605
606static char *validate_group(char *group, DATA_BLOB password,int snum)
607{
608#ifdef HAVE_NETGROUP
609 {
610 char *host, *user, *domain;
611 setnetgrent(group);
612 while (getnetgrent(&host, &user, &domain)) {
613 if (user) {
614 if (user_ok(user, snum) &&
615 password_ok(user,password)) {
616 endnetgrent();
617 return(user);
618 }
619 }
620 }
621 endnetgrent();
622 }
623#endif
624
625#ifdef HAVE_GETGRENT
626 {
627 struct group *gptr;
628 setgrent();
629 while ((gptr = (struct group *)getgrent())) {
630 if (strequal(gptr->gr_name,group))
631 break;
632 }
633
634 /*
635 * As user_ok can recurse doing a getgrent(), we must
636 * copy the member list onto the heap before
637 * use. Bug pointed out by leon@eatworms.swmed.edu.
638 */
639
640 if (gptr) {
641 char *member_list = NULL;
642 size_t list_len = 0;
643 char *member;
644 int i;
645
646 for(i = 0; gptr->gr_mem && gptr->gr_mem[i]; i++) {
647 list_len += strlen(gptr->gr_mem[i])+1;
648 }
649 list_len++;
650
651 member_list = (char *)SMB_MALLOC(list_len);
652 if (!member_list) {
653 endgrent();
654 return NULL;
655 }
656
657 *member_list = '\0';
658 member = member_list;
659
660 for(i = 0; gptr->gr_mem && gptr->gr_mem[i]; i++) {
661 size_t member_len = strlen(gptr->gr_mem[i])+1;
662
663 DEBUG(10,("validate_group: = gr_mem = "
664 "%s\n", gptr->gr_mem[i]));
665
666 safe_strcpy(member, gptr->gr_mem[i],
667 list_len - (member-member_list));
668 member += member_len;
669 }
670
671 endgrent();
672
673 member = member_list;
674 while (*member) {
675 if (user_ok(member,snum) &&
676 password_ok(member,password)) {
677 char *name = talloc_strdup(talloc_tos(),
678 member);
679 SAFE_FREE(member_list);
680 return name;
681 }
682
683 DEBUG(10,("validate_group = member = %s\n",
684 member));
685
686 member += strlen(member) + 1;
687 }
688
689 SAFE_FREE(member_list);
690 } else {
691 endgrent();
692 return NULL;
693 }
694 }
695#endif
696 return(NULL);
697}
698
699/****************************************************************************
700 Check for authority to login to a service with a given username/password.
701 Note this is *NOT* used when logging on using sessionsetup_and_X.
702****************************************************************************/
703
704bool authorise_login(int snum, fstring user, DATA_BLOB password,
705 bool *guest)
706{
707 bool ok = False;
708
709#ifdef DEBUG_PASSWORD
710 DEBUG(100,("authorise_login: checking authorisation on "
711 "user=%s pass=%s\n", user,password.data));
712#endif
713
714 *guest = False;
715
716 /* there are several possibilities:
717 1) login as the given user with given password
718 2) login as a previously registered username with the given
719 password
720 3) login as a session list username with the given password
721 4) login as a previously validated user/password pair
722 5) login as the "user =" user with given password
723 6) login as the "user =" user with no password
724 (guest connection)
725 7) login as guest user with no password
726
727 if the service is guest_only then steps 1 to 5 are skipped
728 */
729
730 /* now check the list of session users */
731 if (!ok) {
732 char *auser;
733 char *user_list = NULL;
734 char *saveptr;
735
736 if ( session_userlist )
737 user_list = SMB_STRDUP(session_userlist);
738 else
739 user_list = SMB_STRDUP("");
740
741 if (!user_list)
742 return(False);
743
744 for (auser = strtok_r(user_list, LIST_SEP, &saveptr);
745 !ok && auser;
746 auser = strtok_r(NULL, LIST_SEP, &saveptr)) {
747 fstring user2;
748 fstrcpy(user2,auser);
749 if (!user_ok(user2,snum))
750 continue;
751
752 if (password_ok(user2,password)) {
753 ok = True;
754 fstrcpy(user,user2);
755 DEBUG(3,("authorise_login: ACCEPTED: session "
756 "list username (%s) and given "
757 "password ok\n", user));
758 }
759 }
760
761 SAFE_FREE(user_list);
762 }
763
764 /* check the user= fields and the given password */
765 if (!ok && lp_username(snum)) {
766 TALLOC_CTX *ctx = talloc_tos();
767 char *auser;
768 char *user_list = talloc_strdup(ctx, lp_username(snum));
769 char *saveptr;
770
771 if (!user_list) {
772 goto check_guest;
773 }
774
775 user_list = talloc_string_sub(ctx,
776 user_list,
777 "%S",
778 lp_servicename(snum));
779
780 if (!user_list) {
781 goto check_guest;
782 }
783
784 for (auser = strtok_r(user_list, LIST_SEP, &saveptr);
785 auser && !ok;
786 auser = strtok_r(NULL, LIST_SEP, &saveptr)) {
787 if (*auser == '@') {
788 auser = validate_group(auser+1,password,snum);
789 if (auser) {
790 ok = True;
791 fstrcpy(user,auser);
792 DEBUG(3,("authorise_login: ACCEPTED: "
793 "group username and given "
794 "password ok (%s)\n", user));
795 }
796 } else {
797 fstring user2;
798 fstrcpy(user2,auser);
799 if (user_ok(user2,snum) &&
800 password_ok(user2,password)) {
801 ok = True;
802 fstrcpy(user,user2);
803 DEBUG(3,("authorise_login: ACCEPTED: "
804 "user list username and "
805 "given password ok (%s)\n",
806 user));
807 }
808 }
809 }
810 }
811
812 check_guest:
813
814 /* check for a normal guest connection */
815 if (!ok && GUEST_OK(snum)) {
816 struct passwd *guest_pw;
817 fstring guestname;
818 fstrcpy(guestname,lp_guestaccount());
819 guest_pw = Get_Pwnam_alloc(talloc_tos(), guestname);
820 if (guest_pw != NULL) {
821 fstrcpy(user,guestname);
822 ok = True;
823 DEBUG(3,("authorise_login: ACCEPTED: guest account "
824 "and guest ok (%s)\n", user));
825 } else {
826 DEBUG(0,("authorise_login: Invalid guest account "
827 "%s??\n",guestname));
828 }
829 TALLOC_FREE(guest_pw);
830 *guest = True;
831 }
832
833 if (ok && !user_ok(user, snum)) {
834 DEBUG(0,("authorise_login: rejected invalid user %s\n",user));
835 ok = False;
836 }
837
838 return(ok);
839}
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