File:
[LON-CAPA] /
loncom /
auth /
lonauth.pm
Revision
1.174:
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Sat Jun 18 02:10:18 2022 UTC (2 years ago) by
raeburn
Branches:
MAIN
CVS tags:
HEAD
- Bug 6907
For LTI-protected deep links in which username is included in launch payload
compare username in payload with username for any existing LON-CAPA session
in current web browser and expire old session, if different user.
1: # The LearningOnline Network
2: # User Authentication Module
3: #
4: # $Id: lonauth.pm,v 1.174 2022/06/18 02:10:18 raeburn Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28:
29: package Apache::lonauth;
30:
31: use strict;
32: use LONCAPA qw(:DEFAULT :match);
33: use Apache::Constants qw(:common);
34: use CGI qw(:standard);
35: use Apache::loncommon();
36: use Apache::lonnet;
37: use Apache::lonmenu();
38: use Apache::createaccount;
39: use Apache::ltiauth;
40: use Fcntl qw(:flock);
41: use Apache::lonlocal;
42: use Apache::File();
43: use HTML::Entities;
44: use Digest::MD5;
45: use CGI::Cookie();
46:
47: # ------------------------------------------------------------ Successful login
48: sub success {
49: my ($r, $username, $domain, $authhost, $lowerurl, $extra_env,
50: $form,$skipcritical,$cid,$expirepub) = @_;
51:
52: # ------------------------------------------------------------ Get cookie ready
53: my $cookie =
54: &Apache::loncommon::init_user_environment($r, $username, $domain,
55: $authhost, $form,
56: {'extra_env' => $extra_env,});
57:
58: my $public=($username eq 'public' && $domain eq 'public');
59:
60: if ($public or $lowerurl eq 'noredirect') { return $cookie; }
61:
62: # -------------------------------------------------------------------- Log this
63:
64: my $ip = &Apache::lonnet::get_requestor_ip();
65: &Apache::lonnet::log($domain,$username,$authhost,
66: "Login $ip");
67:
68: # ------------------------------------------------- Check for critical messages
69:
70: unless ($skipcritical) {
71: my @what=&Apache::lonnet::dump('critical',$domain,$username);
72: if ($what[0]) {
73: if (($what[0] ne 'con_lost') && ($what[0]!~/^error\:/)) {
74: $lowerurl='/adm/email?critical=display';
75: }
76: }
77: }
78:
79: # ----------------------------------------------------------- Get cookies ready
80: my ($securecookie,$defaultcookie);
81: my $ssl = $r->subprocess_env('https');
82: if ($ssl) {
83: $securecookie="lonSID=$cookie; path=/; HttpOnly; secure";
84: my $lonidsdir=$r->dir_config('lonIDsDir');
85: if (($lonidsdir) && (-e "$lonidsdir/$cookie.id")) {
86: my $linkname=substr(Digest::MD5::md5_hex(Digest::MD5::md5_hex(time(). {}. rand(). $$)), 0, 32).'_linked';
87: if (-e "$lonidsdir/$linkname.id") {
88: unlink("$lonidsdir/$linkname.id");
89: }
90: my $made_symlink = eval { symlink("$lonidsdir/$cookie.id",
91: "$lonidsdir/$linkname.id"); 1 };
92: if ($made_symlink) {
93: $defaultcookie = "lonLinkID=$linkname; path=/; HttpOnly;";
94: &Apache::lonnet::appenv({'user.linkedenv' => $linkname});
95: }
96: }
97: } else {
98: $defaultcookie = "lonID=$cookie; path=/; HttpOnly;";
99: }
100: # -------------------------------------------------------- Menu script and info
101: my $destination = $lowerurl;
102: if ($env{'request.lti.login'}) {
103: if (($env{'request.lti.reqcrs'}) && ($env{'request.lti.reqrole'} eq 'cc')) {
104: &Apache::loncommon::content_type($r,'text/html');
105: if ($securecookie) {
106: $r->headers_out->add('Set-cookie' => $securecookie);
107: }
108: if ($defaultcookie) {
109: $r->headers_out->add('Set-cookie' => $defaultcookie);
110: }
111: $r->send_http_header;
112: if (ref($form) eq 'HASH') {
113: $form->{'lti.login'} = $env{'request.lti.login'};
114: $form->{'lti.reqcrs'} = $env{'request.lti.reqcrs'};
115: $form->{'lti.reqrole'} = $env{'request.lti.reqrole'};
116: $form->{'lti.sourcecrs'} = $env{'request.lti.sourcecrs'};
117: }
118: &Apache::ltiauth::lti_reqcrs($r,$domain,$form,$username,$domain);
119: return;
120: }
121: if ($env{'request.lti.selfenrollrole'}) {
122: if (&Apache::ltiauth::lti_enroll($username,$domain,
123: $env{'request.lti.selfenrollrole'}) eq 'ok') {
124: $form->{'role'} = $env{'request.lti.selfenrollrole'};
125: &Apache::lonnet::delenv('request.lti.selfenrollrole');
126: } else {
127: &Apache::ltiauth::invalid_request($r,24);
128: }
129: }
130: }
131: if (defined($form->{role})) {
132: my $envkey = 'user.role.'.$form->{role};
133: my $now=time;
134: my $then=$env{'user.login.time'};
135: my $refresh=$env{'user.refresh.time'};
136: my $update=$env{'user.update.time'};
137: if (!$update) {
138: $update = $then;
139: }
140: if (exists($env{$envkey})) {
141: my ($role,$where,$trolecode,$tstart,$tend,$tremark,$tstatus);
142: &Apache::lonnet::role_status($envkey,$update,$refresh,$now,\$role,\$where,
143: \$trolecode,\$tstatus,\$tstart,\$tend);
144: if ($tstatus eq 'is') {
145: $destination .= ($destination =~ /\?/) ? '&' : '?';
146: my $newrole = &HTML::Entities::encode($form->{role},'"<>&');
147: $destination .= 'selectrole=1&'.$newrole.'=1';
148: }
149: }
150: }
151: if (defined($form->{symb})) {
152: my $destsymb = $form->{symb};
153: my $encrypted;
154: if ($destsymb =~ m{^/enc/}) {
155: $encrypted = 1;
156: if ($cid) {
157: $destsymb = &Apache::lonenc::unencrypted($destsymb,$cid);
158: }
159: }
160: $destination .= ($destination =~ /\?/) ? '&' : '?';
161: if ($destsymb =~ /___/) {
162: my ($map,$resid,$desturl)=split(/___/,$destsymb);
163: $desturl = &Apache::lonnet::clutter($desturl);
164: if ($encrypted) {
165: $desturl = &Apache::lonenc::encrypted($desturl,1,$cid);
166: $destsymb = $form->{symb};
167: }
168: $desturl = &HTML::Entities::encode($desturl,'"<>&');
169: $destsymb = &HTML::Entities::encode($destsymb,'"<>&');
170: $destination .= 'destinationurl='.$desturl.
171: '&destsymb='.$destsymb;
172: } elsif (!$encrypted) {
173: $destsymb = &HTML::Entities::encode($destsymb,'"<>&');
174: $destination .= 'destinationurl='.$destsymb;
175: }
176: }
177: if ($destination =~ m{^/adm/roles}) {
178: $destination .= ($destination =~ /\?/) ? '&' : '?';
179: $destination .= 'source=login';
180: }
181:
182: if (($env{'request.deeplink.login'} eq $lowerurl) &&
183: (($env{'request.linkprot'}) || ($env{'request.linkkey'} ne ''))) {
184: my %info;
185: if ($env{'request.linkprot'}) {
186: $info{'linkprot'} = $env{'request.linkprot'};
187: } elsif ($env{'request.linkkey'} ne '') {
188: $info{'linkkey'} = $env{'request.linkkey'};
189: }
190: $info{'origurl'} = $lowerurl;
191: my $token = &Apache::lonnet::tmpput(\%info,$r->dir_config('lonHostID'),'link');
192: unless (($token eq 'con_lost') || ($token eq 'refused') ||
193: ($token eq 'unknown_cmd') || ($token eq 'no_such_host')) {
194: $destination .= (($destination =~ /\?/) ? '&' : '?') . 'ttoken='.$token;
195: }
196: }
197:
198: my $windowname = 'loncapaclient';
199: if ($env{'request.lti.login'}) {
200: $windowname .= 'lti';
201: }
202: my $windowinfo = Apache::lonhtmlcommon::scripttag('self.name="'.$windowname.'";');
203: my $brcrum = [{'href' => '',
204: 'text' => 'Successful Login'},];
205: my $args = {'bread_crumbs' => $brcrum,};
206: unless ((defined($form->{role})) || (defined($form->{symb}))) {
207: my $update=$env{'user.update.time'};
208: if (!$update) {
209: $update = $env{'user.login.time'};
210: }
211: my %roles_in_env;
212: my $showcount = &Apache::lonroles::roles_from_env(\%roles_in_env,$update);
213: if ($showcount == 1) {
214: foreach my $rolecode (keys(%roles_in_env)) {
215: my ($cid) = ($rolecode =~ m{^\Quser.role.st./\E($match_domain/$match_courseid)(?:/|$)});
216: if ($cid) {
217: my %coursedescription =
218: &Apache::lonnet::coursedescription($cid,{'one_time' => '1'});
219: if ($coursedescription{'type'} eq 'Placement') {
220: $args->{'crstype'} = 'Placement';
221: }
222: last;
223: }
224: }
225: }
226: }
227:
228: # ------------------------------------------------- Output for successful login
229:
230: &Apache::loncommon::content_type($r,'text/html');
231: if ($securecookie) {
232: $r->headers_out->add('Set-cookie' => $securecookie);
233: }
234: if ($defaultcookie) {
235: $r->headers_out->add('Set-cookie' => $defaultcookie);
236: }
237: if ($expirepub) {
238: my $c = new CGI::Cookie(-name => 'lonPubID',
239: -value => '',
240: -expires => '-10y',);
241: $r->headers_out->add('Set-cookie' => $c);
242: }
243: $r->send_http_header;
244:
245: my ($start_page,$js,$pagebody,$end_page);
246: if ($env{'request.lti.login'}) {
247: $args = {'only_body' => 1};
248: if ($env{'request.lti.target'} eq '') {
249: my $ltitarget = (($destination =~ /\?/) ? '&' : '?').
250: 'ltitarget=iframe';
251: &js_escape(\$destination);
252: $js = <<"ENDJS";
253:
254: <script type="text/javascript">
255: // <![CDATA[
256: function setLTItarget() {
257: var newloc = '$destination';
258: if (parent !== window) {
259: newloc += '$ltitarget';
260: }
261: window.location.href=newloc;
262: }
263: // ]]>
264: </script>
265:
266: ENDJS
267: $args->{'add_entries'} = {'onload' => "javascript:setLTItarget();"};
268: $pagebody = '<noscript><span class="LC_warning">'
269: .&mt('Use of LON-CAPA requires Javascript to be enabled in your web browser.')
270: .'</span></noscript>';
271: } else {
272: $args->{'redirect'} = [0,$destination,1];
273: }
274: $start_page=&Apache::loncommon::start_page('',$js,$args);
275: } else {
276: $args->{'redirect'} = [0,$destination];
277: $start_page=&Apache::loncommon::start_page('Successful Login',
278: $js,$args);
279:
280: my %lt=&Apache::lonlocal::texthash(
281: 'wel' => 'Welcome',
282: 'pro' => 'Login problems?',
283: );
284: $pagebody = "<h1>$lt{'wel'}</h1>\n".
285: &mt('Welcome to the Learning[_1]Online[_2] Network with CAPA. Please wait while your session is being set up.','<i>','</i>');
286: my $loginhelp = &loginhelpdisplay($domain);
287: if ($loginhelp) {
288: $pagebody .= '<p><a href="'.$loginhelp.'">'.$lt{'pro'}.'</a></p>';
289: }
290: }
291: $end_page = &Apache::loncommon::end_page();
292: $r->print(<<ENDSUCCESS);
293: $start_page
294: $windowinfo
295: $pagebody
296: $end_page
297: ENDSUCCESS
298: return;
299: }
300:
301: # --------------------------------------------------------------- Failed login!
302:
303: sub failed {
304: my ($r,$message,$form,$authhost) = @_;
305: (undef,undef,undef,my $clientmathml,my $clientunicode) =
306: &Apache::loncommon::decode_user_agent();
307: my $args = {};
308: if ($clientunicode && !$clientmathml) {
309: $args = {'browser.unicode' => 1};
310: }
311: if ($form->{firsturl} =~ m{^/tiny/$match_domain/\w+$}) {
312: if ($form->{linkprot}) {
313: $args->{only_body} = 1;
314: }
315: }
316:
317: my @actions;
318: my $start_page = &Apache::loncommon::start_page('Unsuccessful Login',undef,$args);
319: my $uname = &Apache::loncommon::cleanup_html($form->{'uname'});
320: my $udom = &Apache::loncommon::cleanup_html($form->{'udom'});
321: if (&Apache::lonnet::domain($udom,'description') eq '') {
322: undef($udom);
323: }
324: my $authtype;
325: if (($udom ne '') && ($uname ne '') && ($authhost eq 'no_host')) {
326: $authtype = &Apache::lonnet::queryauthenticate($uname,$udom);
327: }
328: my $retry = '/adm/login';
329: if (($uname eq $form->{'uname'}) && ($authtype !~ /^lti:/)) {
330: $retry .= '?username='.$uname;
331: }
332: if ($udom) {
333: $retry .= (($retry=~/\?/)?'&':'?').'domain='.$udom;
334: }
335: my $lonhost = $r->dir_config('lonHostID');
336: my $querystr;
337: my $result = &set_retry_token($form,$lonhost,\$querystr);
338: if ($result eq 'fail') {
339: if (exists($form->{role})) {
340: my $role = &Apache::loncommon::cleanup_html($form->{role});
341: if ($role ne '') {
342: $retry .= (($retry=~/\?/)?'&':'?').'role='.$role;
343: }
344: }
345: if (exists($form->{symb})) {
346: my $symb = &Apache::loncommon::cleanup_html($form->{symb});
347: if ($symb ne '') {
348: $retry .= (($retry=~/\?/)?'&':'?').'symb='.$symb;
349: }
350: }
351: if (exists($form->{firsturl})) {
352: my $firsturl = &Apache::loncommon::cleanup_html($form->{firsturl});
353: if ($firsturl ne '') {
354: $retry .= (($retry=~/\?/)?'&':'?').'firsturl='.$firsturl;
355: if ($form->{firsturl} =~ m{^/tiny/$match_domain/\w+$}) {
356: unless (exists($form->{linkprot})) {
357: if (exists($form->{linkkey})) {
358: $retry .= 'linkkey='.$form->{linkkey};
359: }
360: }
361: }
362: }
363: }
364: if (exists($form->{linkprot})) {
365: my %info = (
366: 'linkprot' => $form->{'linkprot'},
367: );
368: if ($form->{linkprotuser} ne '') {
369: $info{'linkprotuser'} = $form->{linkprotuser};
370: }
371: my $ltoken = &Apache::lonnet::tmpput(\%info,
372: $r->dir_config('lonHostID'),'retry');
373: if ($ltoken) {
374: $retry .= (($retry =~ /\?/) ? '&' : '?').'ltoken='.$ltoken;
375: }
376: }
377: } elsif ($querystr ne '') {
378: $retry .= (($retry=~/\?/)?'&':'?').$querystr;
379: }
380: my $end_page = &Apache::loncommon::end_page();
381: &Apache::loncommon::content_type($r,'text/html');
382: $r->send_http_header;
383: if ($authtype =~ /^lti:/) {
384: $message = &mt('Direct login is not supported with the username you entered.').
385: '<br /><br />'.
386: &mt('You likely need to launch LON-CAPA from within a course in a different Learning Management System.').
387: '<br />'.
388: &mt('You can also try to log in with a different username.');
389: @actions =
390: (&mt('Try your [_1]log in again[_2].','<a href="'.$retry.'">','</a>'));
391: } else {
392: $message = &mt($message);
393: @actions =
394: (&mt('Please [_1]log in again[_2].','<a href="'.$retry.'">','</a>'));
395: }
396: my $loginhelp = &loginhelpdisplay($udom);
397: if ($loginhelp) {
398: push(@actions, '<a href="'.$loginhelp.'">'.&mt('Login problems?').'</a>');
399: }
400: #FIXME: link to helpdesk might be added here
401: $r->print(
402: $start_page
403: .'<h2>'.&mt('Sorry ...').'</h2>'
404: .&Apache::lonhtmlcommon::confirm_success($message,1).'<br /><br />'
405: .&Apache::lonhtmlcommon::actionbox(\@actions)
406: .$end_page
407: );
408: }
409:
410: # ------------------------------------------------------------------ Rerouting!
411:
412: sub reroute {
413: my ($r) = @_;
414: &Apache::loncommon::content_type($r,'text/html');
415: $r->send_http_header;
416: my $msg='<b>'.&mt('Sorry ...').'</b><br />'
417: .&mt('Please [_1]log in again[_2].');
418: &Apache::loncommon::simple_error_page($r,'Rerouting',$msg,{'no_auto_mt_msg' => 1});
419: }
420:
421: # ---------------------------------------------------------------- Main handler
422:
423: sub handler {
424: my $r = shift;
425: my $londocroot = $r->dir_config('lonDocRoot');
426: # Are we re-routing?
427: if (-e "$londocroot/lon-status/reroute.txt") {
428: &reroute($r);
429: return OK;
430: }
431:
432: &Apache::lonlocal::get_language_handle($r);
433:
434: # -------------------------------- Prevent users from attempting to login twice
435: my $handle = &Apache::lonnet::check_for_valid_session($r);
436: if ($handle ne '') {
437: my $lonidsdir=$r->dir_config('lonIDsDir');
438: if ($handle=~/^publicuser\_/) {
439: # For "public user" - remove it, we apparently really want to login
440: unlink($r->dir_config('lonIDsDir')."/$handle.id");
441: } else {
442: # Indeed, a valid token is found
443: &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);
444: &Apache::loncommon::content_type($r,'text/html');
445: $r->send_http_header;
446: my $start_page =
447: &Apache::loncommon::start_page('Already logged in');
448: my $end_page =
449: &Apache::loncommon::end_page();
450: my $dest = '/adm/roles';
451: my %form = &get_form_items($r);
452: if ($form{'logtoken'}) {
453: my $tmpinfo = &Apache::lonnet::reply('tmpget:'.$form{'logtoken'},
454: $form{'serverid'});
455: unless (($tmpinfo=~/^error/) || ($tmpinfo eq 'con_lost') ||
456: ($tmpinfo eq 'no_such_host')) {
457: my ($des_key,$firsturl,@rest)=split(/&/,$tmpinfo);
458: $firsturl = &unescape($firsturl);
459: my %info;
460: foreach my $item (@rest) {
461: my ($key,$value) = split(/=/,$item);
462: $info{$key} = &unescape($value);
463: }
464: if ($firsturl ne '') {
465: $info{'firsturl'} = $firsturl;
466: $dest = $firsturl;
467: my $relogin;
468: if ($dest =~ m{^/tiny/$match_domain/\w+$}) {
469: if ($env{'request.course.id'}) {
470: my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
471: my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
472: my $symb = &Apache::loncommon::symb_from_tinyurl($dest,$cnum,$cdom);
473: if ($symb) {
474: unless (&set_deeplink_login(%info) eq 'ok') {
475: $relogin = 1;
476: }
477: }
478: }
479: if ($relogin) {
480: $r->print(
481: $start_page
482: .'<p class="LC_warning">'.&mt('You are already logged in!').'</p>'
483: .'<p>'.&mt('Please [_1]log out[_2] first, and then try your access again',
484: '<a href="/adm/logout">','</a>')
485: .'</p>'
486: .$end_page);
487: } else {
488: if (($info{'linkprot'}) || ($info{'linkkey'} ne '')) {
489: if (($info{'linkprot'}) && ($info{'linkprotuser'} ne '')) {
490: unless ($info{'linkprotuser'} eq $env{'user.name'}.':'.$env{'user.domain'}) {
491: $r->print(
492: $start_page
493: .'<p class="LC_warning">'.&mt('You are already logged in, but as a different user from the one expected for the link you followed from another system').'</p>'
494: .'<p>'.&mt('Please [_1]log out[_2] first, and then try following the link again from the other system',
495: '<a href="/adm/logout">','</a>')
496:
497: .'</p>'
498: .$end_page);
499: return OK;
500: }
501: }
502: my $token = &Apache::lonnet::tmpput(\%info,$r->dir_config('lonHostID'),'link');
503: unless (($token eq 'con_lost') || ($token eq 'refused') ||
504: ($token eq 'unknown_cmd') || ($token eq 'no_such_host')) {
505: $dest .= (($dest =~ /\?/) ? '&' : '?') . 'ttoken='.$token;
506: }
507: }
508: $r->print(
509: $start_page
510: .'<p class="LC_warning">'.&mt('You are already logged in!').'</p>'
511: .'<p>'.&mt('Please either [_1]continue the current session[_2] or [_3]log out[_4] first, and then try your access again',
512: '<a href="'.$dest.'">','</a>',
513: '<a href="/adm/logout">','</a>')
514: .'</p>'
515: .$end_page);
516: }
517: return OK;
518: }
519: }
520: }
521: }
522: $r->print(
523: $start_page
524: .'<p class="LC_warning">'.&mt('You are already logged in!').'</p>'
525: .'<p>'.&mt('Please either [_1]continue the current session[_2] or [_3]log out[_4].'
526: ,'<a href="'.$dest.'">','</a>','<a href="/adm/logout">','</a>')
527: .'</p>'
528: .$end_page
529: );
530: return OK;
531: }
532: }
533:
534: # ---------------------------------------------------- No valid token, continue
535:
536: my %form = &get_form_items($r);
537: if ((!$form{'uname'}) || (!$form{'upass0'}) || (!$form{'udom'})) {
538: &failed($r,'Username, password and domain need to be specified.',
539: \%form);
540: return OK;
541: }
542:
543: # split user logging in and "su"-user
544:
545: ($form{'uname'},$form{'suname'},$form{'sudom'})=split(/\:/,$form{'uname'});
546: $form{'uname'} = &LONCAPA::clean_username($form{'uname'});
547: $form{'suname'}= &LONCAPA::clean_username($form{'suname'});
548: $form{'udom'} = &LONCAPA::clean_domain($form{'udom'});
549: $form{'sudom'} = &LONCAPA::clean_domain($form{'sudom'});
550:
551: my $role = $r->dir_config('lonRole');
552: my $domain = $r->dir_config('lonDefDomain');
553: my $prodir = $r->dir_config('lonUsersDir');
554: my $contact_name = &mt('LON-CAPA helpdesk');
555:
556: # ---------------------------------------- Get the information from login token
557:
558: my $tmpinfo=Apache::lonnet::reply('tmpget:'.$form{'logtoken'},
559: $form{'serverid'});
560:
561: if (($tmpinfo=~/^error/) || ($tmpinfo eq 'con_lost') ||
562: ($tmpinfo eq 'no_such_host')) {
563: &failed($r,'Information needed to verify your login information is missing, inaccessible or expired.',\%form);
564: return OK;
565: } else {
566: my $reply = &Apache::lonnet::reply('tmpdel:'.$form{'logtoken'},
567: $form{'serverid'});
568: if ( $reply ne 'ok' ) {
569: &failed($r,'Session could not be opened.',\%form);
570: &Apache::lonnet::logthis("ERROR got a reply of $reply when trying to contact ". $form{'serverid'}." to get login token");
571: return OK;
572: }
573: }
574:
575: if (!&Apache::lonnet::domain($form{'udom'})) {
576: &failed($r,'The domain you provided is not a valid LON-CAPA domain.',\%form);
577: return OK;
578: }
579:
580: my ($des_key,$firsturl,@rest)=split(/&/,$tmpinfo);
581: $firsturl = &unescape($firsturl);
582: foreach my $item (@rest) {
583: my ($key,$value) = split(/=/,$item);
584: $form{$key} = &unescape($value);
585: }
586: if ($firsturl =~ m{^/tiny/$match_domain/\w+$}) {
587: $form{'firsturl'} = $firsturl;
588: }
589: my $upass = $ENV{HTTPS} ? $form{'upass0'}
590: : &Apache::loncommon::des_decrypt($des_key,$form{'upass0'});
591:
592: # ---------------------------------------------------------------- Authenticate
593:
594: my %domconfig = &Apache::lonnet::get_dom('configuration',['usercreation'],$form{'udom'});
595: my ($cancreate,$statustocreate) =
596: &Apache::createaccount::get_creation_controls($form{'udom'},$domconfig{'usercreation'});
597: my $defaultauth;
598: if (ref($cancreate) eq 'ARRAY') {
599: if (grep(/^login$/,@{$cancreate})) {
600: $defaultauth = 1;
601: }
602: }
603: my $clientcancheckhost = 1;
604: my $authhost=Apache::lonnet::authenticate($form{'uname'},$upass,
605: $form{'udom'},$defaultauth,
606: $clientcancheckhost);
607:
608: # --------------------------------------------------------------------- Failed?
609:
610: if ($authhost eq 'no_host') {
611: my $pwdverify;
612: if (&Apache::lonnet::homeserver($form{'uname'},$form{'udom'}) eq 'no_host') {
613: my %possunames = &alternate_unames_check($form{'uname'},$form{'udom'});
614: if (keys(%possunames) > 0) {
615: foreach my $rulematch (keys(%possunames)) {
616: my $possuname = $possunames{$rulematch};
617: if (($possuname ne '') && ($possuname =~ /^$match_username$/)) {
618: $authhost=Apache::lonnet::authenticate($possuname,$upass,
619: $form{'udom'},undef,
620: $clientcancheckhost);
621: if (($authhost eq 'no_host') || ($authhost eq 'no_account_on_host')) {
622: next;
623: } elsif (($authhost ne '') && (&Apache::lonnet::hostname($authhost) ne '')) {
624: $pwdverify = 1;
625: &Apache::lonnet::logthis("Authenticated user: $possuname was submitted as: $form{'uname'}");
626: $form{'uname'} = $possuname;
627: last;
628: }
629: }
630: }
631: }
632: }
633: unless ($pwdverify) {
634: &failed($r,'Username and/or password could not be authenticated.',
635: \%form,$authhost);
636: return OK;
637: }
638: } elsif ($authhost eq 'no_account_on_host') {
639: if ($defaultauth) {
640: my $domdesc = &Apache::lonnet::domain($form{'udom'},'description');
641: unless (&check_can_host($r,\%form,'no_account_on_host',$domdesc)) {
642: return OK;
643: }
644: my $start_page =
645: &Apache::loncommon::start_page('Create a user account in LON-CAPA',
646: '',{'no_inline_link' => 1,});
647: my $lonhost = $r->dir_config('lonHostID');
648: my $origmail = $Apache::lonnet::perlvar{'lonSupportEMail'};
649: my $contacts =
650: &Apache::loncommon::build_recipient_list(undef,'helpdeskmail',
651: $form{'udom'},$origmail);
652: my ($contact_email) = split(',',$contacts);
653: my $output =
654: &Apache::createaccount::username_check($form{'uname'},$form{'udom'},
655: $domdesc,'',$lonhost,
656: $contact_email,$contact_name,
657: undef,$statustocreate);
658: &Apache::loncommon::content_type($r,'text/html');
659: $r->send_http_header;
660: &Apache::createaccount::print_header($r,$start_page);
661: $r->print('<h3>'.&mt('Account creation').'</h3>'.
662: &mt('Although your username and password were authenticated, you do not currently have a LON-CAPA account at this institution.').'<br />'.
663: $output.&Apache::loncommon::end_page());
664: return OK;
665: } else {
666: &failed($r,'Although your username and password were authenticated, you do not currently have a LON-CAPA account in this domain, and you are not permitted to create one.',\%form);
667: return OK;
668: }
669: }
670:
671: if (($firsturl eq '') ||
672: ($firsturl=~/^\/adm\/(logout|remote)/)) {
673: $firsturl='/adm/roles';
674: }
675:
676: my ($hosthere,%sessiondata);
677: if ($form{'iptoken'}) {
678: %sessiondata = &Apache::lonnet::tmpget($form{'iptoken'});
679: my $delete = &Apache::lonnet::tmpdel($form{'iptoken'});
680: if (($sessiondata{'domain'} eq $form{'udom'}) &&
681: ($sessiondata{'username'} eq $form{'uname'})) {
682: $hosthere = 1;
683: }
684: }
685:
686: # --------------------------------- Are we attempting to login as somebody else?
687: if ($form{'suname'}) {
688: my ($suname,$sudom,$sudomref);
689: $suname = $form{'suname'};
690: $sudom = $form{'udom'};
691: if ($form{'sudom'}) {
692: unless ($sudom eq $form{'sudom'}) {
693: if (&Apache::lonnet::domain($form{'sudom'})) {
694: $sudomref = [$form{'sudom'}];
695: $sudom = $form{'sudom'};
696: }
697: }
698: }
699: # ------------ see if the original user has enough privileges to pull this stunt
700: if (&Apache::lonnet::privileged($form{'uname'},$form{'udom'},$sudomref)) {
701: # ---------------------------------------------------- see if the su-user exists
702: unless (&Apache::lonnet::homeserver($suname,$sudom) eq 'no_host') {
703: # ------------------------------ see if the su-user is not too highly privileged
704: if (&Apache::lonnet::privileged($suname,$sudom)) {
705: &Apache::lonnet::logthis('Attempted switch user to privileged user');
706: } else {
707: my $noprivswitch;
708: #
709: # su-user's home server and user's home server must have one of:
710: # (a) same domain
711: # (b) same primary library server for the two domains
712: # (c) same "internet domain" for primary library server(s) for home servers' domains
713: #
714: my $suprim = &Apache::lonnet::domain($sudom,'primary');
715: my $suintdom = &Apache::lonnet::internet_dom($suprim);
716: unless ($sudom eq $form{'udom'}) {
717: my $uprim = &Apache::lonnet::domain($form{'udom'},'primary');
718: my $uintdom = &Apache::lonnet::internet_dom($uprim);
719: unless ($suprim eq $uprim) {
720: unless ($suintdom eq $uintdom) {
721: &Apache::lonnet::logthis('Attempted switch user '
722: .'to user with different "internet domain".');
723: $noprivswitch = 1;
724: }
725: }
726: }
727:
728: unless ($noprivswitch) {
729: #
730: # server where log-in occurs must have same "internet domain" as su-user's home
731: # server
732: #
733: my $lonhost = $r->dir_config('lonHostID');
734: my $hostintdom = &Apache::lonnet::internet_dom($lonhost);
735: if ($hostintdom ne $suintdom) {
736: &Apache::lonnet::logthis('Attempted switch user on a '
737: .'server with a different "internet domain".');
738: } else {
739:
740: # -------------------------------------------------------- actually switch users
741:
742: &Apache::lonnet::logperm('User '.$form{'uname'}.' at '.
743: $form{'udom'}.' logging in as '.$suname.':'.$sudom);
744: $form{'uname'}=$suname;
745: if ($form{'udom'} ne $sudom) {
746: $form{'udom'}=$sudom;
747: }
748: }
749: }
750: }
751: }
752: } else {
753: &Apache::lonnet::logthis('Non-privileged user attempting switch user');
754: }
755: }
756:
757: if ($form{'firsturl'} =~ m{^/tiny/$match_domain/\w+$}) {
758: if (($form{'linkprot'}) && ($form{'linkprotuser'} ne '')) {
759: unless($form{'linkprotuser'} eq $form{'uname'}.':'.$form{'udom'}) {
760: delete($form{'udom'});
761: delete($form{'uname'});
762: &failed($r,'Username and/or domain are different to that expected for the link you followed from another system',
763: \%form,$authhost);
764: return OK;
765: }
766: }
767: }
768:
769: my ($is_balancer,$otherserver);
770:
771: unless ($hosthere) {
772: ($is_balancer,$otherserver) =
773: &Apache::lonnet::check_loadbalancing($form{'uname'},$form{'udom'},'login');
774: if ($is_balancer) {
775: # Check if browser sent a LON-CAPA load balancer cookie (and this is a balancer)
776: my ($found_server,$balancer_cookie) = &Apache::lonnet::check_for_balancer_cookie($r);
777: if (($found_server) && ($balancer_cookie =~ /^\Q$env{'user.domain'}\E_\Q$env{'user.name'}\E_/)) {
778: $otherserver = $found_server;
779: }
780: if ($otherserver eq '') {
781: my $lowest_load;
782: ($otherserver,undef,undef,undef,$lowest_load) = &Apache::lonnet::choose_server($form{'udom'});
783: if ($lowest_load > 100) {
784: $otherserver = &Apache::lonnet::spareserver($r,$lowest_load,$lowest_load,1,$form{'udom'});
785: }
786: }
787: if ($otherserver ne '') {
788: my @hosts = &Apache::lonnet::current_machine_ids();
789: if (grep(/^\Q$otherserver\E$/,@hosts)) {
790: $hosthere = $otherserver;
791: }
792: }
793: }
794: }
795:
796: if (($is_balancer) && (!$hosthere)) {
797: if ($otherserver) {
798: &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef,
799: \%form);
800: my $switchto = '/adm/switchserver?otherserver='.$otherserver;
801: if (($firsturl) && ($firsturl ne '/adm/switchserver') && ($firsturl ne '/adm/roles')) {
802: $switchto .= '&origurl='.$firsturl;
803: }
804: if ($form{'role'}) {
805: $switchto .= '&role='.$form{'role'};
806: }
807: if ($form{'symb'}) {
808: $switchto .= '&symb='.$form{'symb'};
809: }
810: if ($form{'linkprot'}) {
811: $env{'request.linkprot'} = $form{'linkprot'};
812: } elsif ($form{'linkkey'} ne '') {
813: $env{'request.linkkey'} = $form{'linkkey'};
814: }
815: if ($form{'firsturl'} =~ m{^/tiny/$match_domain/\w+$}) {
816: &set_deeplink_login(%form);
817: }
818: $r->internal_redirect($switchto);
819: } else {
820: &Apache::loncommon::content_type($r,'text/html');
821: $r->send_http_header;
822: $r->print(&noswitch());
823: }
824: return OK;
825: } else {
826: if (!&check_can_host($r,\%form,$authhost)) {
827: my ($otherserver) = &Apache::lonnet::choose_server($form{'udom'});
828: if ($otherserver) {
829: &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef,
830: \%form);
831: my $switchto = '/adm/switchserver?otherserver='.$otherserver;
832: if (($firsturl) && ($firsturl ne '/adm/switchserver') && ($firsturl ne '/adm/roles')) {
833: $switchto .= '&origurl='.$firsturl;
834: }
835: if ($form{'role'}) {
836: $switchto .= '&role='.$form{'role'};
837: }
838: if ($form{'symb'}) {
839: $switchto .= '&symb='.$form{'symb'};
840: }
841: if ($form{'linkprot'}) {
842: $env{'request.linkprot'} = $form{'linkprot'};
843: } elsif ($form{'linkkey'} ne '') {
844: $env{'request.linkkey'} = $form{'linkkey'};
845: }
846: if ($form{'firsturl'} =~ m{^/tiny/$match_domain/\w+$}) {
847: &set_deeplink_login(%form);
848: }
849: $r->internal_redirect($switchto);
850: } else {
851: &Apache::loncommon::content_type($r,'text/html');
852: $r->send_http_header;
853: $r->print(&noswitch());
854: }
855: return OK;
856: }
857:
858: # ------------------------------------------------------- Do the load balancing
859:
860: # ---------------------------------------------------------- Determine own load
861: my $loadlim = $r->dir_config('lonLoadLim');
862: my $loadavg;
863: {
864: my $loadfile=Apache::File->new('/proc/loadavg');
865: $loadavg=<$loadfile>;
866: }
867: $loadavg =~ s/\s.*//g;
868: my $loadpercent=sprintf("%.1f",100*$loadavg/$loadlim);
869: my $userloadpercent=&Apache::lonnet::userload();
870:
871: # ---------------------------------------------------------- Are we overloaded?
872: if ((($userloadpercent>100.0)||($loadpercent>100.0))) {
873: my $unloaded=Apache::lonnet::spareserver($r,$loadpercent,$userloadpercent,1,$form{'udom'});
874: if (!$unloaded) {
875: ($unloaded) = &Apache::lonnet::choose_server($form{'udom'});
876: }
877: if ($unloaded) {
878: &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',
879: undef,\%form);
880: if ($form{'linkprot'}) {
881: $env{'request.linkprot'} = $form{'linkprot'};
882: } elsif ($form{'linkkey'} ne '') {
883: $env{'request.linkkey'} = $form{'linkkey'};
884: }
885: if ($form{'firsturl'} =~ m{^/tiny/$match_domain/\w+$}) {
886: &set_deeplink_login(%form);
887: }
888: $r->internal_redirect('/adm/switchserver?otherserver='.$unloaded.'&origurl='.$firsturl);
889: return OK;
890: }
891: }
892: if (($is_balancer) && ($hosthere)) {
893: $form{'noloadbalance'} = $hosthere;
894: }
895: my $extra_env;
896: if (($hosthere) && ($sessiondata{'sessionserver'} ne '')) {
897: if ($sessiondata{'origurl'} ne '') {
898: $firsturl = $sessiondata{'origurl'};
899: $form{'firsturl'} = $sessiondata{'origurl'};
900: my @names = ('role','symb','linkprot','linkkey');
901: foreach my $item (@names) {
902: if ($sessiondata{$item} ne '') {
903: $form{$item} = $sessiondata{$item};
904: }
905: }
906: }
907: }
908: if ($form{'linkprot'}) {
909: my ($linkprotector,$uri) = split(/:/,$form{'linkprot'},2);
910: if ($linkprotector) {
911: $extra_env = {'user.linkprotector' => $linkprotector,
912: 'user.linkproturi' => $uri};
913: }
914: } elsif ($form{'linkkey'} ne '') {
915: $extra_env = {'user.deeplinkkey' => $form{'linkkey'},
916: 'user.keyedlinkuri' => $form{'firsturl'}};
917: }
918: if ($form{'firsturl'} =~ m{^/tiny/$match_domain/\w+$}) {
919: &set_deeplink_login(%form);
920: if ($form{'linkprot'}) {
921: if (ref($extra_env) eq 'HASH') {
922: %{$extra_env} = ( %{$extra_env}, 'request.linkprot' => $form{'linkprot'} );
923: } else {
924: $extra_env = {'request.linkprot' => $form{'linkprot'}};
925: }
926: } elsif ($form{'linkkey'} ne '') {
927: if (ref($extra_env) eq 'HASH') {
928: %{$extra_env} = ( %{$extra_env}, 'request.linkkey' => $form{'linkkey'} );
929: } else {
930: $extra_env = {'request.linkkey' => $form{'linkkey'}};
931: }
932: }
933: if ($env{'request.deeplink.login'}) {
934: if (ref($extra_env) eq 'HASH') {
935: %{$extra_env} = ( %{$extra_env}, 'request.deeplink.login' => $form{'firsturl'} );
936: } else {
937: $extra_env = {'request.deeplink.login' => $form{'firsturl'}};
938: }
939: }
940: }
941: &success($r,$form{'uname'},$form{'udom'},$authhost,$firsturl,$extra_env,
942: \%form);
943: return OK;
944: }
945: }
946:
947: sub get_form_items {
948: my ($r) = @_;
949: my $buffer;
950: if ($r->header_in('Content-length') > 0) {
951: $r->read($buffer,$r->header_in('Content-length'),0);
952: }
953: my %form;
954: foreach my $pair (split(/&/,$buffer)) {
955: my ($name,$value) = split(/=/,$pair);
956: $value =~ tr/+/ /;
957: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
958: $form{$name}=$value;
959: }
960: return %form;
961: }
962:
963: sub set_deeplink_login {
964: my (%form) = @_;
965: my $disallow;
966: if ($form{'firsturl'} =~ m{^/tiny/($match_domain)/\w+$}) {
967: my $cdom = $1;
968: my ($cnum,$symb) = &Apache::loncommon::symb_from_tinyurl($form{'firsturl'},'',$cdom);
969: if ($symb) {
970: if ($env{'request.course.id'} eq $cdom.'_'.$cnum) {
971: my $deeplink;
972: if ($symb =~ /\.(page|sequence)$/) {
973: my $mapname = &Apache::lonnet::deversion((&Apache::lonnet::decode_symb($symb))[2]);
974: my $navmap = Apache::lonnavmaps::navmap->new();
975: if (ref($navmap)) {
976: $deeplink = $navmap->get_mapparam(undef,$mapname,'0.deeplink');
977: }
978: } else {
979: $deeplink = &Apache::lonnet::EXT('resource.0.deeplink',$symb);
980: }
981: if ($deeplink ne '') {
982: my ($state,$others,$listed,$scope,$protect) = split(/,/,$deeplink);
983: if (($protect ne 'none') && ($protect ne '')) {
984: my ($acctype,$item) = split(/:/,$protect);
985: if ($acctype =~ /lti(c|d)$/) {
986: unless ($form{'linkprot'} eq $item.$1.':'.$env{'request.deeplink.login'}) {
987: $disallow = 1;
988: }
989: } elsif ($acctype eq 'key') {
990: unless ($form{'linkkey'} eq $item) {
991: $disallow = 1;
992: }
993: }
994: }
995: }
996: unless ($disallow) {
997: $env{'request.deeplink.login'} = $form{'firsturl'};
998: }
999: } else {
1000: $env{'request.deeplink.login'} = $form{'firsturl'};
1001: }
1002: }
1003: }
1004: if ($disallow) {
1005: return;
1006: }
1007: return 'ok';
1008: }
1009:
1010: sub set_retry_token {
1011: my ($form,$lonhost,$querystr) = @_;
1012: if (ref($form) eq 'HASH') {
1013: my ($firsturl,$token,$extras,@names);
1014: @names = ('role','symb','linkprotuser','linkprot','linkkey','iptoken');
1015: foreach my $name (@names) {
1016: if ($form->{$name} ne '') {
1017: $extras .= '&'.$name.'='.&escape($form->{$name});
1018: last if ($name eq 'linkprot');
1019: }
1020: }
1021: my $firsturl = $form->{'firsturl'};
1022: if (($firsturl ne '') || ($extras ne '')) {
1023: $extras .= ':retry';
1024: $token = &Apache::lonnet::reply('tmpput:'.&escape($firsturl).
1025: $extras,$lonhost);
1026: if (($token eq 'con_lost') || ($token eq 'no_such_host')) {
1027: return 'fail';
1028: } else {
1029: if (ref($querystr)) {
1030: $$querystr = 'retry='.$token;
1031: }
1032: return 'ok';
1033: }
1034: }
1035: }
1036: return;
1037: }
1038:
1039: sub check_can_host {
1040: my ($r,$form,$authhost,$domdesc) = @_;
1041: return unless (ref($form) eq 'HASH');
1042: my $canhost = 1;
1043: my $lonhost = $r->dir_config('lonHostID');
1044: my $udom = $form->{'udom'};
1045: my @intdoms;
1046: my $internet_names = &Apache::lonnet::get_internet_names($lonhost);
1047: if (ref($internet_names) eq 'ARRAY') {
1048: @intdoms = @{$internet_names};
1049: }
1050: my $uprimary_id = &Apache::lonnet::domain($udom,'primary');
1051: my $uint_dom = &Apache::lonnet::internet_dom($uprimary_id);
1052: unless ($uint_dom ne '' && grep(/^\Q$uint_dom\E$/,@intdoms)) {
1053: my $machine_dom = &Apache::lonnet::host_domain($lonhost);
1054: my $hostname = &Apache::lonnet::hostname($lonhost);
1055: my $serverhomeID = &Apache::lonnet::get_server_homeID($hostname);
1056: my $serverhomedom = &Apache::lonnet::host_domain($serverhomeID);
1057: my %defdomdefaults = &Apache::lonnet::get_domain_defaults($serverhomedom);
1058: my %udomdefaults = &Apache::lonnet::get_domain_defaults($udom);
1059: my $loncaparev;
1060: if ($authhost eq 'no_account_on_host') {
1061: $loncaparev = &Apache::lonnet::get_server_loncaparev($machine_dom);
1062: } else {
1063: $loncaparev = &Apache::lonnet::get_server_loncaparev($machine_dom,$lonhost);
1064: }
1065: $canhost = &Apache::lonnet::can_host_session($udom,$lonhost,$loncaparev,
1066: $udomdefaults{'remotesessions'},
1067: $defdomdefaults{'hostedsessions'});
1068: }
1069: unless ($canhost) {
1070: if ($authhost eq 'no_account_on_host') {
1071: my $checkloginvia = 1;
1072: my ($login_host,$hostname) =
1073: &Apache::lonnet::choose_server($udom,$checkloginvia);
1074: &Apache::loncommon::content_type($r,'text/html');
1075: $r->send_http_header;
1076: if ($login_host ne '') {
1077: my $protocol = $Apache::lonnet::protocol{$login_host};
1078: $protocol = 'http' if ($protocol ne 'https');
1079: my $alias = &Apache::lonnet::use_proxy_alias($r,$login_host);
1080: $hostname = $alias if ($alias ne '');
1081: my $newurl = $protocol.'://'.$hostname.'/adm/createaccount';
1082: #FIXME Should preserve where user was going and linkprot by setting ltoken at $login_host
1083: $r->print(&Apache::loncommon::start_page('Create a user account in LON-CAPA').
1084: '<h3>'.&mt('Account creation').'</h3>'.
1085: &mt('You do not currently have a LON-CAPA account at this institution.').'<br />'.
1086: '<p>'.&mt('You will be able to create one by logging into a LON-CAPA server within the [_1] domain.',$domdesc).'</p>'.
1087: '<p>'.&mt('[_1]Log in[_2]','<a href="'.$newurl.'">','</a>').
1088: &Apache::loncommon::end_page());
1089: } else {
1090: $r->print(&Apache::loncommon::start_page('Access to LON-CAPA unavailable').
1091: '<h3>'.&mt('Account creation unavailable').'</h3>'.
1092: &mt('You do not currently have a LON-CAPA account at this institution.').'<br />'.
1093: '<p>'.&mt('Currently a LON-CAPA server is not available within the [_1] domain for you to log-in to, to create an account.',$domdesc).'</p>'.
1094: &Apache::loncommon::end_page());
1095: }
1096: } else {
1097: &success($r,$form->{'uname'},$udom,$authhost,'noredirect',undef,
1098: $form);
1099: if ($form->{'firsturl'} =~ m{^/tiny/$match_domain/\w+$}) {
1100: $env{'request.deeplink.login'} = $form->{'firsturl'};
1101: }
1102: if ($form->{'linkprot'}) {
1103: $env{'request.linkprot'} = $form->{'linkprot'};
1104: } elsif ($form->{'linkkey'} ne '') {
1105: $env{'request.linkkey'} = $form->{'linkkey'};
1106: }
1107: my ($otherserver) = &Apache::lonnet::choose_server($udom);
1108: $r->internal_redirect('/adm/switchserver?otherserver='.$otherserver);
1109: }
1110: }
1111: return $canhost;
1112: }
1113:
1114: sub noswitch {
1115: my $result = &Apache::loncommon::start_page('Access to LON-CAPA unavailable').
1116: '<h3>'.&mt('Session unavailable').'</h3>'.
1117: &mt('This LON-CAPA server is unable to host your session.').'<br />'.
1118: '<p>'.&mt('Currently no other LON-CAPA server is available to host your session either.').'</p>'.
1119: &Apache::loncommon::end_page();
1120: return $result;
1121: }
1122:
1123: sub loginhelpdisplay {
1124: my ($authdomain) = @_;
1125: my $login_help = 1;
1126: my $lang = &Apache::lonlocal::current_language();
1127: if ($login_help) {
1128: my $dom = $authdomain;
1129: if ($dom eq '') {
1130: $dom = &Apache::lonnet::default_login_domain();
1131: }
1132: my %domconfhash = &Apache::loncommon::get_domainconf($dom);
1133: my $loginhelp_url;
1134: if ($lang) {
1135: $loginhelp_url = $domconfhash{$dom.'.login.helpurl_'.$lang};
1136: if ($loginhelp_url ne '') {
1137: return $loginhelp_url;
1138: }
1139: }
1140: $loginhelp_url = $domconfhash{$dom.'.login.helpurl_nolang'};
1141: if ($loginhelp_url ne '') {
1142: return $loginhelp_url;
1143: } else {
1144: return '/adm/loginproblems.html';
1145: }
1146: }
1147: return;
1148: }
1149:
1150: sub alternate_unames_check {
1151: my ($uname,$udom) = @_;
1152: my %possunames;
1153: my %domdefs = &Apache::lonnet::get_domain_defaults($udom);
1154: if (ref($domdefs{'unamemap_rule'}) eq 'ARRAY') {
1155: if (@{$domdefs{'unamemap_rule'}} > 0) {
1156: %possunames =
1157: &Apache::lonnet::inst_rulecheck($udom,$uname,undef,
1158: 'unamemap',$domdefs{'unamemap_rule'});
1159: }
1160: }
1161: return %possunames;
1162: }
1163:
1164: 1;
1165: __END__
1166:
1167:
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