1: # The LearningOnline Network
2: # User Authentication Module
3: #
4: # $Id: lonauth.pm,v 1.173 2022/05/21 05:16:43 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:
312: my @actions;
313: my $start_page = &Apache::loncommon::start_page('Unsuccessful Login',undef,$args);
314: my $uname = &Apache::loncommon::cleanup_html($form->{'uname'});
315: my $udom = &Apache::loncommon::cleanup_html($form->{'udom'});
316: if (&Apache::lonnet::domain($udom,'description') eq '') {
317: undef($udom);
318: }
319: my $authtype;
320: if (($udom ne '') && ($uname ne '') && ($authhost eq 'no_host')) {
321: $authtype = &Apache::lonnet::queryauthenticate($uname,$udom);
322: }
323: my $retry = '/adm/login';
324: if (($uname eq $form->{'uname'}) && ($authtype !~ /^lti:/)) {
325: $retry .= '?username='.$uname;
326: }
327: if ($udom) {
328: $retry .= (($retry=~/\?/)?'&':'?').'domain='.$udom;
329: }
330: my $lonhost = $r->dir_config('lonHostID');
331: my $querystr;
332: my $result = &set_retry_token($form,$lonhost,\$querystr);
333: if ($result eq 'fail') {
334: if (exists($form->{role})) {
335: my $role = &Apache::loncommon::cleanup_html($form->{role});
336: if ($role ne '') {
337: $retry .= (($retry=~/\?/)?'&':'?').'role='.$role;
338: }
339: }
340: if (exists($form->{symb})) {
341: my $symb = &Apache::loncommon::cleanup_html($form->{symb});
342: if ($symb ne '') {
343: $retry .= (($retry=~/\?/)?'&':'?').'symb='.$symb;
344: }
345: }
346: if (exists($form->{firsturl})) {
347: my $firsturl = &Apache::loncommon::cleanup_html($form->{firsturl});
348: if ($firsturl ne '') {
349: $retry .= (($retry=~/\?/)?'&':'?').'firsturl='.$firsturl;
350: if ($form->{firsturl} =~ m{^/tiny/$match_domain/\w+$}) {
351: unless (exists($form->{linkprot})) {
352: if (exists($form->{linkkey})) {
353: $retry .= 'linkkey='.$form->{linkkey};
354: }
355: }
356: }
357: }
358: }
359: if (exists($form->{linkprot})) {
360: my $ltoken = &Apache::lonnet::tmpput({linkprot => $form->{'linkprot'}},
361: $r->dir_config('lonHostID'),'retry');
362: if ($ltoken) {
363: $retry .= (($retry =~ /\?/) ? '&' : '?').'ltoken='.$ltoken;
364: }
365: }
366: } elsif ($querystr ne '') {
367: $retry .= (($retry=~/\?/)?'&':'?').$querystr;
368: }
369: my $end_page = &Apache::loncommon::end_page();
370: &Apache::loncommon::content_type($r,'text/html');
371: $r->send_http_header;
372: if ($authtype =~ /^lti:/) {
373: $message = &mt('Direct login is not supported with the username you entered.').
374: '<br /><br />'.
375: &mt('You likely need to launch LON-CAPA from within a course in a different Learning Management System.').
376: '<br />'.
377: &mt('You can also try to log in with a different username.');
378: @actions =
379: (&mt('Try your [_1]log in again[_2].','<a href="'.$retry.'">','</a>'));
380: } else {
381: $message = &mt($message);
382: @actions =
383: (&mt('Please [_1]log in again[_2].','<a href="'.$retry.'">','</a>'));
384: }
385: my $loginhelp = &loginhelpdisplay($udom);
386: if ($loginhelp) {
387: push(@actions, '<a href="'.$loginhelp.'">'.&mt('Login problems?').'</a>');
388: }
389: #FIXME: link to helpdesk might be added here
390: $r->print(
391: $start_page
392: .'<h2>'.&mt('Sorry ...').'</h2>'
393: .&Apache::lonhtmlcommon::confirm_success($message,1).'<br /><br />'
394: .&Apache::lonhtmlcommon::actionbox(\@actions)
395: .$end_page
396: );
397: }
398:
399: # ------------------------------------------------------------------ Rerouting!
400:
401: sub reroute {
402: my ($r) = @_;
403: &Apache::loncommon::content_type($r,'text/html');
404: $r->send_http_header;
405: my $msg='<b>'.&mt('Sorry ...').'</b><br />'
406: .&mt('Please [_1]log in again[_2].');
407: &Apache::loncommon::simple_error_page($r,'Rerouting',$msg,{'no_auto_mt_msg' => 1});
408: }
409:
410: # ---------------------------------------------------------------- Main handler
411:
412: sub handler {
413: my $r = shift;
414: my $londocroot = $r->dir_config('lonDocRoot');
415: # Are we re-routing?
416: if (-e "$londocroot/lon-status/reroute.txt") {
417: &reroute($r);
418: return OK;
419: }
420:
421: &Apache::lonlocal::get_language_handle($r);
422:
423: # -------------------------------- Prevent users from attempting to login twice
424: my $handle = &Apache::lonnet::check_for_valid_session($r);
425: if ($handle ne '') {
426: my $lonidsdir=$r->dir_config('lonIDsDir');
427: if ($handle=~/^publicuser\_/) {
428: # For "public user" - remove it, we apparently really want to login
429: unlink($r->dir_config('lonIDsDir')."/$handle.id");
430: } else {
431: # Indeed, a valid token is found
432: &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);
433: &Apache::loncommon::content_type($r,'text/html');
434: $r->send_http_header;
435: my $start_page =
436: &Apache::loncommon::start_page('Already logged in');
437: my $end_page =
438: &Apache::loncommon::end_page();
439: my $dest = '/adm/roles';
440: my %form = &get_form_items($r);
441: if ($form{'logtoken'}) {
442: my $tmpinfo = &Apache::lonnet::reply('tmpget:'.$form{'logtoken'},
443: $form{'serverid'});
444: unless (($tmpinfo=~/^error/) || ($tmpinfo eq 'con_lost') ||
445: ($tmpinfo eq 'no_such_host')) {
446: my ($des_key,$firsturl,@rest)=split(/&/,$tmpinfo);
447: $firsturl = &unescape($firsturl);
448: my %info;
449: foreach my $item (@rest) {
450: my ($key,$value) = split(/=/,$item);
451: $info{$key} = &unescape($value);
452: }
453: if ($firsturl ne '') {
454: $info{'firsturl'} = $firsturl;
455: $dest = $firsturl;
456: my $relogin;
457: if ($dest =~ m{^/tiny/$match_domain/\w+$}) {
458: if ($env{'request.course.id'}) {
459: my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
460: my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
461: my $symb = &Apache::loncommon::symb_from_tinyurl($dest,$cnum,$cdom);
462: if ($symb) {
463: unless (&set_deeplink_login(%info) eq 'ok') {
464: $relogin = 1;
465: }
466: }
467: }
468: if ($relogin) {
469: $r->print(
470: $start_page
471: .'<p class="LC_warning">'.&mt('You are already logged in!').'</p>'
472: .'<p>'.&mt('Please [_1]log out[_2] first, and then try your access again',
473: '<a href="/adm/logout">','</a>')
474: .'</p>'
475: .$end_page);
476: } else {
477: if (($info{'linkprot'}) || ($info{'linkkey'} ne '')) {
478: my $token = &Apache::lonnet::tmpput(\%info,$r->dir_config('lonHostID'),'link');
479: unless (($token eq 'con_lost') || ($token eq 'refused') ||
480: ($token eq 'unknown_cmd') || ($token eq 'no_such_host')) {
481: $dest .= (($dest =~ /\?/) ? '&' : '?') . 'ttoken='.$token;
482: }
483: }
484: $r->print(
485: $start_page
486: .'<p class="LC_warning">'.&mt('You are already logged in!').'</p>'
487: .'<p>'.&mt('Please either [_1]continue the current session[_2] or [_3]log out[_4] first, and then try your access again',
488: '<a href="'.$dest.'">','</a>',
489: '<a href="/adm/logout">','</a>')
490: .'</p>'
491: .$end_page);
492: }
493: return OK;
494: }
495: }
496: }
497: }
498: $r->print(
499: $start_page
500: .'<p class="LC_warning">'.&mt('You are already logged in!').'</p>'
501: .'<p>'.&mt('Please either [_1]continue the current session[_2] or [_3]log out[_4].'
502: ,'<a href="'.$dest.'">','</a>','<a href="/adm/logout">','</a>')
503: .'</p>'
504: .$end_page
505: );
506: return OK;
507: }
508: }
509:
510: # ---------------------------------------------------- No valid token, continue
511:
512: my %form = &get_form_items($r);
513: if ((!$form{'uname'}) || (!$form{'upass0'}) || (!$form{'udom'})) {
514: &failed($r,'Username, password and domain need to be specified.',
515: \%form);
516: return OK;
517: }
518:
519: # split user logging in and "su"-user
520:
521: ($form{'uname'},$form{'suname'},$form{'sudom'})=split(/\:/,$form{'uname'});
522: $form{'uname'} = &LONCAPA::clean_username($form{'uname'});
523: $form{'suname'}= &LONCAPA::clean_username($form{'suname'});
524: $form{'udom'} = &LONCAPA::clean_domain($form{'udom'});
525: $form{'sudom'} = &LONCAPA::clean_domain($form{'sudom'});
526:
527: my $role = $r->dir_config('lonRole');
528: my $domain = $r->dir_config('lonDefDomain');
529: my $prodir = $r->dir_config('lonUsersDir');
530: my $contact_name = &mt('LON-CAPA helpdesk');
531:
532: # ---------------------------------------- Get the information from login token
533:
534: my $tmpinfo=Apache::lonnet::reply('tmpget:'.$form{'logtoken'},
535: $form{'serverid'});
536:
537: if (($tmpinfo=~/^error/) || ($tmpinfo eq 'con_lost') ||
538: ($tmpinfo eq 'no_such_host')) {
539: &failed($r,'Information needed to verify your login information is missing, inaccessible or expired.',\%form);
540: return OK;
541: } else {
542: my $reply = &Apache::lonnet::reply('tmpdel:'.$form{'logtoken'},
543: $form{'serverid'});
544: if ( $reply ne 'ok' ) {
545: &failed($r,'Session could not be opened.',\%form);
546: &Apache::lonnet::logthis("ERROR got a reply of $reply when trying to contact ". $form{'serverid'}." to get login token");
547: return OK;
548: }
549: }
550:
551: if (!&Apache::lonnet::domain($form{'udom'})) {
552: &failed($r,'The domain you provided is not a valid LON-CAPA domain.',\%form);
553: return OK;
554: }
555:
556: my ($des_key,$firsturl,@rest)=split(/&/,$tmpinfo);
557: $firsturl = &unescape($firsturl);
558: foreach my $item (@rest) {
559: my ($key,$value) = split(/=/,$item);
560: $form{$key} = &unescape($value);
561: }
562: if ($firsturl =~ m{^/tiny/$match_domain/\w+$}) {
563: $form{'firsturl'} = $firsturl;
564: }
565: my $upass = $ENV{HTTPS} ? $form{'upass0'}
566: : &Apache::loncommon::des_decrypt($des_key,$form{'upass0'});
567:
568: # ---------------------------------------------------------------- Authenticate
569:
570: my %domconfig = &Apache::lonnet::get_dom('configuration',['usercreation'],$form{'udom'});
571: my ($cancreate,$statustocreate) =
572: &Apache::createaccount::get_creation_controls($form{'udom'},$domconfig{'usercreation'});
573: my $defaultauth;
574: if (ref($cancreate) eq 'ARRAY') {
575: if (grep(/^login$/,@{$cancreate})) {
576: $defaultauth = 1;
577: }
578: }
579: my $clientcancheckhost = 1;
580: my $authhost=Apache::lonnet::authenticate($form{'uname'},$upass,
581: $form{'udom'},$defaultauth,
582: $clientcancheckhost);
583:
584: # --------------------------------------------------------------------- Failed?
585:
586: if ($authhost eq 'no_host') {
587: my $pwdverify;
588: if (&Apache::lonnet::homeserver($form{'uname'},$form{'udom'}) eq 'no_host') {
589: my %possunames = &alternate_unames_check($form{'uname'},$form{'udom'});
590: if (keys(%possunames) > 0) {
591: foreach my $rulematch (keys(%possunames)) {
592: my $possuname = $possunames{$rulematch};
593: if (($possuname ne '') && ($possuname =~ /^$match_username$/)) {
594: $authhost=Apache::lonnet::authenticate($possuname,$upass,
595: $form{'udom'},undef,
596: $clientcancheckhost);
597: if (($authhost eq 'no_host') || ($authhost eq 'no_account_on_host')) {
598: next;
599: } elsif (($authhost ne '') && (&Apache::lonnet::hostname($authhost) ne '')) {
600: $pwdverify = 1;
601: &Apache::lonnet::logthis("Authenticated user: $possuname was submitted as: $form{'uname'}");
602: $form{'uname'} = $possuname;
603: last;
604: }
605: }
606: }
607: }
608: }
609: unless ($pwdverify) {
610: &failed($r,'Username and/or password could not be authenticated.',
611: \%form,$authhost);
612: return OK;
613: }
614: } elsif ($authhost eq 'no_account_on_host') {
615: if ($defaultauth) {
616: my $domdesc = &Apache::lonnet::domain($form{'udom'},'description');
617: unless (&check_can_host($r,\%form,'no_account_on_host',$domdesc)) {
618: return OK;
619: }
620: my $start_page =
621: &Apache::loncommon::start_page('Create a user account in LON-CAPA',
622: '',{'no_inline_link' => 1,});
623: my $lonhost = $r->dir_config('lonHostID');
624: my $origmail = $Apache::lonnet::perlvar{'lonSupportEMail'};
625: my $contacts =
626: &Apache::loncommon::build_recipient_list(undef,'helpdeskmail',
627: $form{'udom'},$origmail);
628: my ($contact_email) = split(',',$contacts);
629: my $output =
630: &Apache::createaccount::username_check($form{'uname'},$form{'udom'},
631: $domdesc,'',$lonhost,
632: $contact_email,$contact_name,
633: undef,$statustocreate);
634: &Apache::loncommon::content_type($r,'text/html');
635: $r->send_http_header;
636: &Apache::createaccount::print_header($r,$start_page);
637: $r->print('<h3>'.&mt('Account creation').'</h3>'.
638: &mt('Although your username and password were authenticated, you do not currently have a LON-CAPA account at this institution.').'<br />'.
639: $output.&Apache::loncommon::end_page());
640: return OK;
641: } else {
642: &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);
643: return OK;
644: }
645: }
646:
647: if (($firsturl eq '') ||
648: ($firsturl=~/^\/adm\/(logout|remote)/)) {
649: $firsturl='/adm/roles';
650: }
651:
652: my ($hosthere,%sessiondata);
653: if ($form{'iptoken'}) {
654: %sessiondata = &Apache::lonnet::tmpget($form{'iptoken'});
655: my $delete = &Apache::lonnet::tmpdel($form{'iptoken'});
656: if (($sessiondata{'domain'} eq $form{'udom'}) &&
657: ($sessiondata{'username'} eq $form{'uname'})) {
658: $hosthere = 1;
659: }
660: }
661:
662: # --------------------------------- Are we attempting to login as somebody else?
663: if ($form{'suname'}) {
664: my ($suname,$sudom,$sudomref);
665: $suname = $form{'suname'};
666: $sudom = $form{'udom'};
667: if ($form{'sudom'}) {
668: unless ($sudom eq $form{'sudom'}) {
669: if (&Apache::lonnet::domain($form{'sudom'})) {
670: $sudomref = [$form{'sudom'}];
671: $sudom = $form{'sudom'};
672: }
673: }
674: }
675: # ------------ see if the original user has enough privileges to pull this stunt
676: if (&Apache::lonnet::privileged($form{'uname'},$form{'udom'},$sudomref)) {
677: # ---------------------------------------------------- see if the su-user exists
678: unless (&Apache::lonnet::homeserver($suname,$sudom) eq 'no_host') {
679: # ------------------------------ see if the su-user is not too highly privileged
680: if (&Apache::lonnet::privileged($suname,$sudom)) {
681: &Apache::lonnet::logthis('Attempted switch user to privileged user');
682: } else {
683: my $noprivswitch;
684: #
685: # su-user's home server and user's home server must have one of:
686: # (a) same domain
687: # (b) same primary library server for the two domains
688: # (c) same "internet domain" for primary library server(s) for home servers' domains
689: #
690: my $suprim = &Apache::lonnet::domain($sudom,'primary');
691: my $suintdom = &Apache::lonnet::internet_dom($suprim);
692: unless ($sudom eq $form{'udom'}) {
693: my $uprim = &Apache::lonnet::domain($form{'udom'},'primary');
694: my $uintdom = &Apache::lonnet::internet_dom($uprim);
695: unless ($suprim eq $uprim) {
696: unless ($suintdom eq $uintdom) {
697: &Apache::lonnet::logthis('Attempted switch user '
698: .'to user with different "internet domain".');
699: $noprivswitch = 1;
700: }
701: }
702: }
703:
704: unless ($noprivswitch) {
705: #
706: # server where log-in occurs must have same "internet domain" as su-user's home
707: # server
708: #
709: my $lonhost = $r->dir_config('lonHostID');
710: my $hostintdom = &Apache::lonnet::internet_dom($lonhost);
711: if ($hostintdom ne $suintdom) {
712: &Apache::lonnet::logthis('Attempted switch user on a '
713: .'server with a different "internet domain".');
714: } else {
715:
716: # -------------------------------------------------------- actually switch users
717:
718: &Apache::lonnet::logperm('User '.$form{'uname'}.' at '.
719: $form{'udom'}.' logging in as '.$suname.':'.$sudom);
720: $form{'uname'}=$suname;
721: if ($form{'udom'} ne $sudom) {
722: $form{'udom'}=$sudom;
723: }
724: }
725: }
726: }
727: }
728: } else {
729: &Apache::lonnet::logthis('Non-privileged user attempting switch user');
730: }
731: }
732:
733: my ($is_balancer,$otherserver);
734:
735: unless ($hosthere) {
736: ($is_balancer,$otherserver) =
737: &Apache::lonnet::check_loadbalancing($form{'uname'},$form{'udom'},'login');
738: if ($is_balancer) {
739: # Check if browser sent a LON-CAPA load balancer cookie (and this is a balancer)
740: my ($found_server,$balancer_cookie) = &Apache::lonnet::check_for_balancer_cookie($r);
741: if (($found_server) && ($balancer_cookie =~ /^\Q$env{'user.domain'}\E_\Q$env{'user.name'}\E_/)) {
742: $otherserver = $found_server;
743: }
744: if ($otherserver eq '') {
745: my $lowest_load;
746: ($otherserver,undef,undef,undef,$lowest_load) = &Apache::lonnet::choose_server($form{'udom'});
747: if ($lowest_load > 100) {
748: $otherserver = &Apache::lonnet::spareserver($r,$lowest_load,$lowest_load,1,$form{'udom'});
749: }
750: }
751: if ($otherserver ne '') {
752: my @hosts = &Apache::lonnet::current_machine_ids();
753: if (grep(/^\Q$otherserver\E$/,@hosts)) {
754: $hosthere = $otherserver;
755: }
756: }
757: }
758: }
759:
760: if (($is_balancer) && (!$hosthere)) {
761: if ($otherserver) {
762: &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef,
763: \%form);
764: my $switchto = '/adm/switchserver?otherserver='.$otherserver;
765: if (($firsturl) && ($firsturl ne '/adm/switchserver') && ($firsturl ne '/adm/roles')) {
766: $switchto .= '&origurl='.$firsturl;
767: }
768: if ($form{'role'}) {
769: $switchto .= '&role='.$form{'role'};
770: }
771: if ($form{'symb'}) {
772: $switchto .= '&symb='.$form{'symb'};
773: }
774: if ($form{'linkprot'}) {
775: $env{'request.linkprot'} = $form{'linkprot'};
776: } elsif ($form{'linkkey'} ne '') {
777: $env{'request.linkkey'} = $form{'linkkey'};
778: }
779: if ($form{'firsturl'} =~ m{^/tiny/$match_domain/\w+$}) {
780: &set_deeplink_login(%form);
781: }
782: $r->internal_redirect($switchto);
783: } else {
784: &Apache::loncommon::content_type($r,'text/html');
785: $r->send_http_header;
786: $r->print(&noswitch());
787: }
788: return OK;
789: } else {
790: if (!&check_can_host($r,\%form,$authhost)) {
791: my ($otherserver) = &Apache::lonnet::choose_server($form{'udom'});
792: if ($otherserver) {
793: &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef,
794: \%form);
795: my $switchto = '/adm/switchserver?otherserver='.$otherserver;
796: if (($firsturl) && ($firsturl ne '/adm/switchserver') && ($firsturl ne '/adm/roles')) {
797: $switchto .= '&origurl='.$firsturl;
798: }
799: if ($form{'role'}) {
800: $switchto .= '&role='.$form{'role'};
801: }
802: if ($form{'symb'}) {
803: $switchto .= '&symb='.$form{'symb'};
804: }
805: if ($form{'linkprot'}) {
806: $env{'request.linkprot'} = $form{'linkprot'};
807: } elsif ($form{'linkkey'} ne '') {
808: $env{'request.linkkey'} = $form{'linkkey'};
809: }
810: if ($form{'firsturl'} =~ m{^/tiny/$match_domain/\w+$}) {
811: &set_deeplink_login(%form);
812: }
813: $r->internal_redirect($switchto);
814: } else {
815: &Apache::loncommon::content_type($r,'text/html');
816: $r->send_http_header;
817: $r->print(&noswitch());
818: }
819: return OK;
820: }
821:
822: # ------------------------------------------------------- Do the load balancing
823:
824: # ---------------------------------------------------------- Determine own load
825: my $loadlim = $r->dir_config('lonLoadLim');
826: my $loadavg;
827: {
828: my $loadfile=Apache::File->new('/proc/loadavg');
829: $loadavg=<$loadfile>;
830: }
831: $loadavg =~ s/\s.*//g;
832: my $loadpercent=sprintf("%.1f",100*$loadavg/$loadlim);
833: my $userloadpercent=&Apache::lonnet::userload();
834:
835: # ---------------------------------------------------------- Are we overloaded?
836: if ((($userloadpercent>100.0)||($loadpercent>100.0))) {
837: my $unloaded=Apache::lonnet::spareserver($r,$loadpercent,$userloadpercent,1,$form{'udom'});
838: if (!$unloaded) {
839: ($unloaded) = &Apache::lonnet::choose_server($form{'udom'});
840: }
841: if ($unloaded) {
842: &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',
843: undef,\%form);
844: if ($form{'linkprot'}) {
845: $env{'request.linkprot'} = $form{'linkprot'};
846: } elsif ($form{'linkkey'} ne '') {
847: $env{'request.linkkey'} = $form{'linkkey'};
848: }
849: if ($form{'firsturl'} =~ m{^/tiny/$match_domain/\w+$}) {
850: &set_deeplink_login(%form);
851: }
852: $r->internal_redirect('/adm/switchserver?otherserver='.$unloaded.'&origurl='.$firsturl);
853: return OK;
854: }
855: }
856: if (($is_balancer) && ($hosthere)) {
857: $form{'noloadbalance'} = $hosthere;
858: }
859: my $extra_env;
860: if (($hosthere) && ($sessiondata{'sessionserver'} ne '')) {
861: if ($sessiondata{'origurl'} ne '') {
862: $firsturl = $sessiondata{'origurl'};
863: $form{'firsturl'} = $sessiondata{'origurl'};
864: my @names = ('role','symb','linkprot','linkkey');
865: foreach my $item (@names) {
866: if ($sessiondata{$item} ne '') {
867: $form{$item} = $sessiondata{$item};
868: }
869: }
870: }
871: }
872: if ($form{'linkprot'}) {
873: my ($linkprotector,$uri) = split(/:/,$form{'linkprot'},2);
874: if ($linkprotector) {
875: $extra_env = {'user.linkprotector' => $linkprotector,
876: 'user.linkproturi' => $uri};
877: }
878: } elsif ($form{'linkkey'} ne '') {
879: $extra_env = {'user.deeplinkkey' => $form{'linkkey'},
880: 'user.keyedlinkuri' => $form{'firsturl'}};
881: }
882: if ($form{'firsturl'} =~ m{^/tiny/$match_domain/\w+$}) {
883: &set_deeplink_login(%form);
884: if ($form{'linkprot'}) {
885: if (ref($extra_env) eq 'HASH') {
886: %{$extra_env} = ( %{$extra_env}, 'request.linkprot' => $form{'linkprot'} );
887: } else {
888: $extra_env = {'request.linkprot' => $form{'linkprot'}};
889: }
890: } elsif ($form{'linkkey'} ne '') {
891: if (ref($extra_env) eq 'HASH') {
892: %{$extra_env} = ( %{$extra_env}, 'request.linkkey' => $form{'linkkey'} );
893: } else {
894: $extra_env = {'request.linkkey' => $form{'linkkey'}};
895: }
896: }
897: if ($env{'request.deeplink.login'}) {
898: if (ref($extra_env) eq 'HASH') {
899: %{$extra_env} = ( %{$extra_env}, 'request.deeplink.login' => $form{'firsturl'} );
900: } else {
901: $extra_env = {'request.deeplink.login' => $form{'firsturl'}};
902: }
903: }
904: }
905: &success($r,$form{'uname'},$form{'udom'},$authhost,$firsturl,$extra_env,
906: \%form);
907: return OK;
908: }
909: }
910:
911: sub get_form_items {
912: my ($r) = @_;
913: my $buffer;
914: if ($r->header_in('Content-length') > 0) {
915: $r->read($buffer,$r->header_in('Content-length'),0);
916: }
917: my %form;
918: foreach my $pair (split(/&/,$buffer)) {
919: my ($name,$value) = split(/=/,$pair);
920: $value =~ tr/+/ /;
921: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
922: $form{$name}=$value;
923: }
924: return %form;
925: }
926:
927: sub set_deeplink_login {
928: my (%form) = @_;
929: my $disallow;
930: if ($form{'firsturl'} =~ m{^/tiny/($match_domain)/\w+$}) {
931: my $cdom = $1;
932: my ($cnum,$symb) = &Apache::loncommon::symb_from_tinyurl($form{'firsturl'},'',$cdom);
933: if ($symb) {
934: if ($env{'request.course.id'} eq $cdom.'_'.$cnum) {
935: my $deeplink;
936: if ($symb =~ /\.(page|sequence)$/) {
937: my $mapname = &Apache::lonnet::deversion((&Apache::lonnet::decode_symb($symb))[2]);
938: my $navmap = Apache::lonnavmaps::navmap->new();
939: if (ref($navmap)) {
940: $deeplink = $navmap->get_mapparam(undef,$mapname,'0.deeplink');
941: }
942: } else {
943: $deeplink = &Apache::lonnet::EXT('resource.0.deeplink',$symb);
944: }
945: if ($deeplink ne '') {
946: my ($state,$others,$listed,$scope,$protect) = split(/,/,$deeplink);
947: if (($protect ne 'none') && ($protect ne '')) {
948: my ($acctype,$item) = split(/:/,$protect);
949: if ($acctype =~ /lti(c|d)$/) {
950: unless ($form{'linkprot'} eq $item.$1.':'.$env{'request.deeplink.login'}) {
951: $disallow = 1;
952: }
953: } elsif ($acctype eq 'key') {
954: unless ($form{'linkkey'} eq $item) {
955: $disallow = 1;
956: }
957: }
958: }
959: }
960: unless ($disallow) {
961: $env{'request.deeplink.login'} = $form{'firsturl'};
962: }
963: } else {
964: $env{'request.deeplink.login'} = $form{'firsturl'};
965: }
966: }
967: }
968: if ($disallow) {
969: return;
970: }
971: return 'ok';
972: }
973:
974: sub set_retry_token {
975: my ($form,$lonhost,$querystr) = @_;
976: if (ref($form) eq 'HASH') {
977: my ($firsturl,$token,$extras,@names);
978: @names = ('role','symb','linkprot','linkkey','iptoken');
979: foreach my $name (@names) {
980: if ($form->{$name} ne '') {
981: $extras .= '&'.$name.'='.&escape($form->{$name});
982: last if ($name eq 'linkprot');
983: }
984: }
985: my $firsturl = $form->{'firsturl'};
986: if (($firsturl ne '') || ($extras ne '')) {
987: $extras .= ':retry';
988: $token = &Apache::lonnet::reply('tmpput:'.&escape($firsturl).
989: $extras,$lonhost);
990: if (($token eq 'con_lost') || ($token eq 'no_such_host')) {
991: return 'fail';
992: } else {
993: if (ref($querystr)) {
994: $$querystr = 'retry='.$token;
995: }
996: return 'ok';
997: }
998: }
999: }
1000: return;
1001: }
1002:
1003: sub check_can_host {
1004: my ($r,$form,$authhost,$domdesc) = @_;
1005: return unless (ref($form) eq 'HASH');
1006: my $canhost = 1;
1007: my $lonhost = $r->dir_config('lonHostID');
1008: my $udom = $form->{'udom'};
1009: my @intdoms;
1010: my $internet_names = &Apache::lonnet::get_internet_names($lonhost);
1011: if (ref($internet_names) eq 'ARRAY') {
1012: @intdoms = @{$internet_names};
1013: }
1014: my $uprimary_id = &Apache::lonnet::domain($udom,'primary');
1015: my $uint_dom = &Apache::lonnet::internet_dom($uprimary_id);
1016: unless ($uint_dom ne '' && grep(/^\Q$uint_dom\E$/,@intdoms)) {
1017: my $machine_dom = &Apache::lonnet::host_domain($lonhost);
1018: my $hostname = &Apache::lonnet::hostname($lonhost);
1019: my $serverhomeID = &Apache::lonnet::get_server_homeID($hostname);
1020: my $serverhomedom = &Apache::lonnet::host_domain($serverhomeID);
1021: my %defdomdefaults = &Apache::lonnet::get_domain_defaults($serverhomedom);
1022: my %udomdefaults = &Apache::lonnet::get_domain_defaults($udom);
1023: my $loncaparev;
1024: if ($authhost eq 'no_account_on_host') {
1025: $loncaparev = &Apache::lonnet::get_server_loncaparev($machine_dom);
1026: } else {
1027: $loncaparev = &Apache::lonnet::get_server_loncaparev($machine_dom,$lonhost);
1028: }
1029: $canhost = &Apache::lonnet::can_host_session($udom,$lonhost,$loncaparev,
1030: $udomdefaults{'remotesessions'},
1031: $defdomdefaults{'hostedsessions'});
1032: }
1033: unless ($canhost) {
1034: if ($authhost eq 'no_account_on_host') {
1035: my $checkloginvia = 1;
1036: my ($login_host,$hostname) =
1037: &Apache::lonnet::choose_server($udom,$checkloginvia);
1038: &Apache::loncommon::content_type($r,'text/html');
1039: $r->send_http_header;
1040: if ($login_host ne '') {
1041: my $protocol = $Apache::lonnet::protocol{$login_host};
1042: $protocol = 'http' if ($protocol ne 'https');
1043: my $alias = &Apache::lonnet::use_proxy_alias($r,$login_host);
1044: $hostname = $alias if ($alias ne '');
1045: my $newurl = $protocol.'://'.$hostname.'/adm/createaccount';
1046: #FIXME Should preserve where user was going and linkprot by setting ltoken at $login_host
1047: $r->print(&Apache::loncommon::start_page('Create a user account in LON-CAPA').
1048: '<h3>'.&mt('Account creation').'</h3>'.
1049: &mt('You do not currently have a LON-CAPA account at this institution.').'<br />'.
1050: '<p>'.&mt('You will be able to create one by logging into a LON-CAPA server within the [_1] domain.',$domdesc).'</p>'.
1051: '<p>'.&mt('[_1]Log in[_2]','<a href="'.$newurl.'">','</a>').
1052: &Apache::loncommon::end_page());
1053: } else {
1054: $r->print(&Apache::loncommon::start_page('Access to LON-CAPA unavailable').
1055: '<h3>'.&mt('Account creation unavailable').'</h3>'.
1056: &mt('You do not currently have a LON-CAPA account at this institution.').'<br />'.
1057: '<p>'.&mt('Currently a LON-CAPA server is not available within the [_1] domain for you to log-in to, to create an account.',$domdesc).'</p>'.
1058: &Apache::loncommon::end_page());
1059: }
1060: } else {
1061: &success($r,$form->{'uname'},$udom,$authhost,'noredirect',undef,
1062: $form);
1063: if ($form->{'firsturl'} =~ m{^/tiny/$match_domain/\w+$}) {
1064: $env{'request.deeplink.login'} = $form->{'firsturl'};
1065: }
1066: if ($form->{'linkprot'}) {
1067: $env{'request.linkprot'} = $form->{'linkprot'};
1068: } elsif ($form->{'linkkey'} ne '') {
1069: $env{'request.linkkey'} = $form->{'linkkey'};
1070: }
1071: my ($otherserver) = &Apache::lonnet::choose_server($udom);
1072: $r->internal_redirect('/adm/switchserver?otherserver='.$otherserver);
1073: }
1074: }
1075: return $canhost;
1076: }
1077:
1078: sub noswitch {
1079: my $result = &Apache::loncommon::start_page('Access to LON-CAPA unavailable').
1080: '<h3>'.&mt('Session unavailable').'</h3>'.
1081: &mt('This LON-CAPA server is unable to host your session.').'<br />'.
1082: '<p>'.&mt('Currently no other LON-CAPA server is available to host your session either.').'</p>'.
1083: &Apache::loncommon::end_page();
1084: return $result;
1085: }
1086:
1087: sub loginhelpdisplay {
1088: my ($authdomain) = @_;
1089: my $login_help = 1;
1090: my $lang = &Apache::lonlocal::current_language();
1091: if ($login_help) {
1092: my $dom = $authdomain;
1093: if ($dom eq '') {
1094: $dom = &Apache::lonnet::default_login_domain();
1095: }
1096: my %domconfhash = &Apache::loncommon::get_domainconf($dom);
1097: my $loginhelp_url;
1098: if ($lang) {
1099: $loginhelp_url = $domconfhash{$dom.'.login.helpurl_'.$lang};
1100: if ($loginhelp_url ne '') {
1101: return $loginhelp_url;
1102: }
1103: }
1104: $loginhelp_url = $domconfhash{$dom.'.login.helpurl_nolang'};
1105: if ($loginhelp_url ne '') {
1106: return $loginhelp_url;
1107: } else {
1108: return '/adm/loginproblems.html';
1109: }
1110: }
1111: return;
1112: }
1113:
1114: sub alternate_unames_check {
1115: my ($uname,$udom) = @_;
1116: my %possunames;
1117: my %domdefs = &Apache::lonnet::get_domain_defaults($udom);
1118: if (ref($domdefs{'unamemap_rule'}) eq 'ARRAY') {
1119: if (@{$domdefs{'unamemap_rule'}} > 0) {
1120: %possunames =
1121: &Apache::lonnet::inst_rulecheck($udom,$uname,undef,
1122: 'unamemap',$domdefs{'unamemap_rule'});
1123: }
1124: }
1125: return %possunames;
1126: }
1127:
1128: 1;
1129: __END__
1130:
1131:
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