Annotation of loncom/auth/lonauth.pm, revision 1.157
1.136 kruse 1: # The LearningOnline Network
2: # User Authentication Module
3: #
1.157 ! raeburn 4: # $Id: lonauth.pm,v 1.156 2018/12/26 20:10:21 raeburn Exp $
1.136 kruse 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;
1.140 raeburn 32: use LONCAPA qw(:DEFAULT :match);
1.136 kruse 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;
1.149 raeburn 39: use Apache::ltiauth;
1.136 kruse 40: use Fcntl qw(:flock);
41: use Apache::lonlocal;
42: use Apache::File();
43: use HTML::Entities;
1.143 raeburn 44: use Digest::MD5;
1.136 kruse 45:
46: # ------------------------------------------------------------ Successful login
47: sub success {
48: my ($r, $username, $domain, $authhost, $lowerurl, $extra_env,
1.149 raeburn 49: $form,$skipcritical) = @_;
1.136 kruse 50:
51: # ------------------------------------------------------------ Get cookie ready
52: my $cookie =
53: &Apache::loncommon::init_user_environment($r, $username, $domain,
54: $authhost, $form,
55: {'extra_env' => $extra_env,});
56:
57: my $public=($username eq 'public' && $domain eq 'public');
58:
59: if ($public or $lowerurl eq 'noredirect') { return $cookie; }
60:
61: # -------------------------------------------------------------------- Log this
62:
63: &Apache::lonnet::log($domain,$username,$authhost,
64: "Login $ENV{'REMOTE_ADDR'}");
65:
66: # ------------------------------------------------- Check for critical messages
67:
1.149 raeburn 68: unless ($skipcritical) {
69: my @what=&Apache::lonnet::dump('critical',$domain,$username);
70: if ($what[0]) {
71: if (($what[0] ne 'con_lost') && ($what[0]!~/^error\:/)) {
72: $lowerurl='/adm/email?critical=display';
73: }
1.136 kruse 74: }
75: }
76:
1.143 raeburn 77: # ----------------------------------------------------------- Get cookies ready
78: my ($securecookie,$defaultcookie);
1.154 raeburn 79: my $ssl = $r->subprocess_env('https');
80: if ($ssl) {
81: $securecookie="lonSID=$cookie; path=/; HttpOnly; secure";
1.143 raeburn 82: my $lonidsdir=$r->dir_config('lonIDsDir');
83: if (($lonidsdir) && (-e "$lonidsdir/$cookie.id")) {
84: my $linkname=substr(Digest::MD5::md5_hex(Digest::MD5::md5_hex(time(). {}. rand(). $$)), 0, 32).'_linked';
85: if (-e "$lonidsdir/$linkname.id") {
86: unlink("$lonidsdir/$linkname.id");
87: }
88: my $made_symlink = eval { symlink("$lonidsdir/$cookie.id",
89: "$lonidsdir/$linkname.id"); 1 };
90: if ($made_symlink) {
91: $defaultcookie = "lonLinkID=$linkname; path=/; HttpOnly;";
1.154 raeburn 92: &Apache::lonnet::appenv({'user.linkedenv' => $linkname});
1.143 raeburn 93: }
94: }
95: } else {
96: $defaultcookie = "lonID=$cookie; path=/; HttpOnly;";
97: }
1.136 kruse 98: # -------------------------------------------------------- Menu script and info
99: my $destination = $lowerurl;
1.149 raeburn 100: if ($env{'request.lti.login'}) {
101: if (($env{'request.lti.reqcrs'}) && ($env{'request.lti.reqrole'} eq 'cc')) {
102: &Apache::loncommon::content_type($r,'text/html');
103: if ($securecookie) {
104: $r->headers_out->add('Set-cookie' => $securecookie);
105: }
106: if ($defaultcookie) {
107: $r->headers_out->add('Set-cookie' => $defaultcookie);
108: }
109: $r->send_http_header;
1.152 raeburn 110: if (ref($form) eq 'HASH') {
111: $form->{'lti.reqcrs'} = $env{'request.lti.reqcrs'};
112: $form->{'lti.reqrole'} = $env{'request.lti.reqrole'};
113: $form->{'lti.sourcecrs'} = $env{'request.lti.sourcecrs'};
114: }
1.149 raeburn 115: &Apache::ltiauth::lti_reqcrs($r,$domain,$form,$username,$domain);
116: return;
117: }
118: if ($env{'request.lti.selfenrollrole'}) {
119: if (&Apache::ltiauth::lti_enroll($username,$domain,
120: $env{'request.lti.selfenrollrole'}) eq 'ok') {
121: $form->{'role'} = $env{'request.lti.selfenrollrole'};
122: &Apache::lonnet::delenv('request.lti.selfenrollrole');
123: } else {
124: &Apache::ltiauth::invalid_request($r,24);
125: }
126: }
127: }
1.136 kruse 128: if (defined($form->{role})) {
129: my $envkey = 'user.role.'.$form->{role};
130: my $now=time;
131: my $then=$env{'user.login.time'};
132: my $refresh=$env{'user.refresh.time'};
133: my $update=$env{'user.update.time'};
134: if (!$update) {
135: $update = $then;
136: }
137: if (exists($env{$envkey})) {
138: my ($role,$where,$trolecode,$tstart,$tend,$tremark,$tstatus);
139: &Apache::lonnet::role_status($envkey,$update,$refresh,$now,\$role,\$where,
140: \$trolecode,\$tstatus,\$tstart,\$tend);
141: if ($tstatus eq 'is') {
142: $destination .= ($destination =~ /\?/) ? '&' : '?';
143: my $newrole = &HTML::Entities::encode($form->{role},'"<>&');
144: $destination .= 'selectrole=1&'.$newrole.'=1';
145: }
146: }
147: }
148: if (defined($form->{symb})) {
149: my $destsymb = $form->{symb};
150: $destination .= ($destination =~ /\?/) ? '&' : '?';
151: if ($destsymb =~ /___/) {
152: # FIXME Need to deal with encrypted symbs and urls as needed.
153: my ($map,$resid,$desturl)=split(/___/,$destsymb);
1.137 raeburn 154: $desturl = &Apache::lonnet::clutter($desturl);
1.136 kruse 155: $desturl = &HTML::Entities::encode($desturl,'"<>&');
156: $destsymb = &HTML::Entities::encode($destsymb,'"<>&');
157: $destination .= 'destinationurl='.$desturl.
158: '&destsymb='.$destsymb;
159: } else {
160: $destsymb = &HTML::Entities::encode($destsymb,'"<>&');
161: $destination .= 'destinationurl='.$destsymb;
162: }
163: }
164: if ($destination =~ m{^/adm/roles}) {
165: $destination .= ($destination =~ /\?/) ? '&' : '?';
166: $destination .= 'source=login';
167: }
168:
1.150 raeburn 169: my $windowname = 'loncapaclient';
170: if ($env{'request.lti.login'}) {
171: $windowname .= 'lti';
172: }
173: my $windowinfo = Apache::lonhtmlcommon::scripttag('self.name="'.$windowname.'";');
1.136 kruse 174: my $brcrum = [{'href' => '',
175: 'text' => 'Successful Login'},];
1.140 raeburn 176: my $args = {'bread_crumbs' => $brcrum,};
177: unless ((defined($form->{role})) || (defined($form->{symb}))) {
178: my $update=$env{'user.update.time'};
179: if (!$update) {
180: $update = $env{'user.login.time'};
181: }
182: my %roles_in_env;
183: my $showcount = &Apache::lonroles::roles_from_env(\%roles_in_env,$update);
184: if ($showcount == 1) {
185: foreach my $rolecode (keys(%roles_in_env)) {
186: my ($cid) = ($rolecode =~ m{^\Quser.role.st./\E($match_domain/$match_courseid)(?:/|$)});
187: if ($cid) {
188: my %coursedescription =
189: &Apache::lonnet::coursedescription($cid,{'one_time' => '1'});
190: if ($coursedescription{'type'} eq 'Placement') {
191: $args->{'crstype'} = 'Placement';
192: }
193: last;
194: }
195: }
196: }
197: }
1.136 kruse 198:
199: # ------------------------------------------------- Output for successful login
200:
201: &Apache::loncommon::content_type($r,'text/html');
1.143 raeburn 202: if ($securecookie) {
203: $r->headers_out->add('Set-cookie' => $securecookie);
204: }
205: if ($defaultcookie) {
206: $r->headers_out->add('Set-cookie' => $defaultcookie);
207: }
1.136 kruse 208: $r->send_http_header;
209:
1.153 raeburn 210: my ($start_page,$js,$pagebody,$end_page);
1.151 raeburn 211: if ($env{'request.lti.login'}) {
1.153 raeburn 212: $args = {'only_body' => 1};
213: if ($env{'request.lti.target'} eq '') {
214: my $ltitarget = (($destination =~ /\?/) ? '&' : '?').
215: 'ltitarget=iframe';
216: $js = <<"ENDJS";
217:
218: <script type="text/javascript">
219: // <![CDATA[
220: function setLTItarget() {
221: var newloc = '$destination';
222: if (parent !== window) {
223: newloc += '$ltitarget';
224: }
225: window.location.href=newloc;
226: }
227: // ]]>
228: </script>
229:
230: ENDJS
231: $args->{'add_entries'} = {'onload' => "javascript:setLTItarget();"};
232: $pagebody = '<noscript><span class="LC_warning">'
233: .&mt('Use of LON-CAPA requires Javascript to be enabled in your web browser.')
234: .'</span></noscript>';
235: } else {
236: $args->{'redirect'} = [0,$destination,1];
237: }
238: $start_page=&Apache::loncommon::start_page('',$js,$args);
1.151 raeburn 239: } else {
1.153 raeburn 240: $args->{'redirect'} = [0,$destination];
1.151 raeburn 241: $start_page=&Apache::loncommon::start_page('Successful Login',
1.153 raeburn 242: $js,$args);
1.149 raeburn 243:
1.151 raeburn 244: my %lt=&Apache::lonlocal::texthash(
245: 'wel' => 'Welcome',
246: 'pro' => 'Login problems?',
247: );
248: $pagebody = "<h1>$lt{'wel'}</h1>\n".
249: &mt('Welcome to the Learning[_1]Online[_2] Network with CAPA. Please wait while your session is being set up.','<i>','</i>');
250: my $loginhelp = &loginhelpdisplay($domain);
251: if ($loginhelp) {
252: $pagebody .= '<p><a href="'.$loginhelp.'">'.$lt{'pro'}.'</a></p>';
253: }
1.136 kruse 254: }
1.153 raeburn 255: $end_page = &Apache::loncommon::end_page();
1.136 kruse 256: $r->print(<<ENDSUCCESS);
257: $start_page
258: $windowinfo
1.151 raeburn 259: $pagebody
1.136 kruse 260: $end_page
261: ENDSUCCESS
262: return;
263: }
264:
265: # --------------------------------------------------------------- Failed login!
266:
267: sub failed {
268: my ($r,$message,$form) = @_;
269: (undef,undef,undef,my $clientmathml,my $clientunicode) =
270: &Apache::loncommon::decode_user_agent();
271: my $args = {};
272: if ($clientunicode && !$clientmathml) {
273: $args = {'browser.unicode' => 1};
274: }
275:
276: my $start_page = &Apache::loncommon::start_page('Unsuccessful Login',undef,$args);
277: my $uname = &Apache::loncommon::cleanup_html($form->{'uname'});
278: my $udom = &Apache::loncommon::cleanup_html($form->{'udom'});
279: if (&Apache::lonnet::domain($udom,'description') eq '') {
280: undef($udom);
281: }
282: my $retry = '/adm/login';
283: if ($uname eq $form->{'uname'}) {
284: $retry .= '?username='.$uname;
285: }
286: if ($udom) {
287: $retry .= (($retry=~/\?/)?'&':'?').'domain='.$udom;
288: }
289: if (exists($form->{role})) {
290: my $role = &Apache::loncommon::cleanup_html($form->{role});
291: if ($role ne '') {
292: $retry .= (($retry=~/\?/)?'&':'?').'role='.$role;
293: }
294: }
295: if (exists($form->{symb})) {
296: my $symb = &Apache::loncommon::cleanup_html($form->{symb});
297: if ($symb ne '') {
298: $retry .= (($retry=~/\?/)?'&':'?').'symb='.$symb;
299: }
300: }
1.155 raeburn 301: if (exists($form->{firsturl})) {
302: my $firsturl = &Apache::loncommon::cleanup_html($form->{firsturl});
303: if ($firsturl ne '') {
304: $retry .= (($retry=~/\?/)?'&':'?').'firsturl='.$firsturl;
1.157 ! raeburn 305: if ($firsturl =~ m{^/tiny/$match_domain/\w+$}) {
! 306: unless (exists($form->{linkprot})) {
! 307: if (exists($form->{linkkey})) {
! 308: $retry .= 'linkkey='.$form->{linkkey};
! 309: }
! 310: }
! 311: }
1.155 raeburn 312: }
313: }
1.156 raeburn 314: if (exists($form->{linkprot})) {
315: my $ltoken = &Apache::lonnet::tmpput({linkprot => $form->{'linkprot'}},
316: $r->dir_config('lonHostID'));
317: if ($ltoken) {
318: $retry .= (($retry =~ /\?/) ? '&' : '?').'ltoken='.$ltoken;
319: }
320: }
1.136 kruse 321: my $end_page = &Apache::loncommon::end_page();
322: &Apache::loncommon::content_type($r,'text/html');
323: $r->send_http_header;
324: my @actions =
325: (&mt('Please [_1]log in again[_2].','<a href="'.$retry.'">','</a>'));
326: my $loginhelp = &loginhelpdisplay($udom);
327: if ($loginhelp) {
328: push(@actions, '<a href="'.$loginhelp.'">'.&mt('Login problems?').'</a>');
329: }
330: #FIXME: link to helpdesk might be added here
331:
332: $r->print(
333: $start_page
334: .'<h2>'.&mt('Sorry ...').'</h2>'
335: .&Apache::lonhtmlcommon::confirm_success(&mt($message),1).'<br /><br />'
336: .&Apache::lonhtmlcommon::actionbox(\@actions)
337: .$end_page
338: );
339: }
340:
341: # ------------------------------------------------------------------ Rerouting!
342:
343: sub reroute {
344: my ($r) = @_;
345: &Apache::loncommon::content_type($r,'text/html');
346: $r->send_http_header;
347: my $msg='<b>'.&mt('Sorry ...').'</b><br />'
348: .&mt('Please [_1]log in again[_2].');
349: &Apache::loncommon::simple_error_page($r,'Rerouting',$msg,{'no_auto_mt_msg' => 1});
350: }
351:
352: # ---------------------------------------------------------------- Main handler
353:
354: sub handler {
355: my $r = shift;
356: my $londocroot = $r->dir_config('lonDocRoot');
357: # Are we re-routing?
358: if (-e "$londocroot/lon-status/reroute.txt") {
359: &reroute($r);
360: return OK;
361: }
362:
363: &Apache::lonlocal::get_language_handle($r);
364:
365: # -------------------------------- Prevent users from attempting to login twice
366: my $handle = &Apache::lonnet::check_for_valid_session($r);
367: if ($handle ne '') {
368: my $lonidsdir=$r->dir_config('lonIDsDir');
369: if ($handle=~/^publicuser\_/) {
370: # For "public user" - remove it, we apparently really want to login
371: unlink($r->dir_config('lonIDsDir')."/$handle.id");
372: } else {
373: # Indeed, a valid token is found
374: &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);
375: &Apache::loncommon::content_type($r,'text/html');
376: $r->send_http_header;
377: my $start_page =
378: &Apache::loncommon::start_page('Already logged in');
379: my $end_page =
380: &Apache::loncommon::end_page();
381: my $dest = '/adm/roles';
382: if ($env{'form.firsturl'} ne '') {
383: $dest = $env{'form.firsturl'};
1.157 ! raeburn 384: if ($env{'form.firsturl'} =~ m{^/tiny/$match_domain/\w+$}) {
! 385: &Apache::lonnet::appenv({'request.deeplink.login' => $env{'form.firsturl'}});
! 386: }
1.136 kruse 387: }
388: $r->print(
389: $start_page
390: .'<p class="LC_warning">'.&mt('You are already logged in!').'</p>'
391: .'<p>'.&mt('Please either [_1]continue the current session[_2] or [_3]log out[_4].'
392: ,'<a href="'.$dest.'">','</a>','<a href="/adm/logout">','</a>')
393: .'</p>'
394: .$end_page
395: );
396: return OK;
397: }
398: }
399:
400: # ---------------------------------------------------- No valid token, continue
401:
402:
403: my $buffer;
404: if ($r->header_in('Content-length') > 0) {
405: $r->read($buffer,$r->header_in('Content-length'),0);
406: }
407: my %form;
408: foreach my $pair (split(/&/,$buffer)) {
409: my ($name,$value) = split(/=/,$pair);
410: $value =~ tr/+/ /;
411: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
412: $form{$name}=$value;
413: }
414:
415: if ((!$form{'uname'}) || (!$form{'upass0'}) || (!$form{'udom'})) {
416: &failed($r,'Username, password and domain need to be specified.',
417: \%form);
418: return OK;
419: }
420:
421: # split user logging in and "su"-user
422:
1.145 raeburn 423: ($form{'uname'},$form{'suname'},$form{'sudom'})=split(/\:/,$form{'uname'});
1.136 kruse 424: $form{'uname'} = &LONCAPA::clean_username($form{'uname'});
425: $form{'suname'}= &LONCAPA::clean_username($form{'suname'});
1.145 raeburn 426: $form{'udom'} = &LONCAPA::clean_domain($form{'udom'});
427: $form{'sudom'} = &LONCAPA::clean_domain($form{'sudom'});
1.136 kruse 428:
429: my $role = $r->dir_config('lonRole');
430: my $domain = $r->dir_config('lonDefDomain');
431: my $prodir = $r->dir_config('lonUsersDir');
432: my $contact_name = &mt('LON-CAPA helpdesk');
433:
434: # ---------------------------------------- Get the information from login token
435:
436: my $tmpinfo=Apache::lonnet::reply('tmpget:'.$form{'logtoken'},
437: $form{'serverid'});
438:
439: if (($tmpinfo=~/^error/) || ($tmpinfo eq 'con_lost') ||
440: ($tmpinfo eq 'no_such_host')) {
441: &failed($r,'Information needed to verify your login information is missing, inaccessible or expired.',\%form);
442: return OK;
443: } else {
444: my $reply = &Apache::lonnet::reply('tmpdel:'.$form{'logtoken'},
445: $form{'serverid'});
446: if ( $reply ne 'ok' ) {
447: &failed($r,'Session could not be opened.',\%form);
448: &Apache::lonnet::logthis("ERROR got a reply of $reply when trying to contact ". $form{'serverid'}." to get login token");
449: return OK;
450: }
451: }
452:
453: if (!&Apache::lonnet::domain($form{'udom'})) {
454: &failed($r,'The domain you provided is not a valid LON-CAPA domain.',\%form);
455: return OK;
456: }
457:
1.157 ! raeburn 458: my ($key,$firsturl,$rolestr,$symbstr,$iptokenstr,$linkstr)=split(/&/,$tmpinfo);
1.136 kruse 459: if ($rolestr) {
460: $rolestr = &unescape($rolestr);
461: }
462: if ($symbstr) {
463: $symbstr= &unescape($symbstr);
464: }
1.138 raeburn 465: if ($iptokenstr) {
466: $iptokenstr = &unescape($iptokenstr);
467: }
1.157 ! raeburn 468: if ($linkstr) {
! 469: $linkstr = &unescape($linkstr);
1.156 raeburn 470: }
1.155 raeburn 471: if ($firsturl =~ m{^/tiny/$match_domain/\w+$}) {
472: $form{'firsturl'} = $firsturl;
473: }
1.136 kruse 474: if ($rolestr =~ /^role=/) {
475: (undef,$form{'role'}) = split('=',$rolestr);
476: }
477: if ($symbstr =~ /^symb=/) {
478: (undef,$form{'symb'}) = split('=',$symbstr);
479: }
1.138 raeburn 480: if ($iptokenstr =~ /^iptoken=/) {
481: (undef,$form{'iptoken'}) = split('=',$iptokenstr);
482: }
1.157 ! raeburn 483: if ($linkstr =~ /^linkprot=/) {
! 484: (undef,$form{'linkprot'}) = split('=',$linkstr);
! 485: } elsif ($linkstr =~ /^linkkey=/) {
! 486: (undef,$form{'linkkey'}) = split('=',$linkstr);
1.156 raeburn 487: }
1.136 kruse 488:
1.139 raeburn 489: my $upass = $ENV{HTTPS} ? $form{'upass0'}
490: : &Apache::loncommon::des_decrypt($key,$form{'upass0'});
1.136 kruse 491:
492: # ---------------------------------------------------------------- Authenticate
493:
494: my %domconfig = &Apache::lonnet::get_dom('configuration',['usercreation'],$form{'udom'});
495: my ($cancreate,$statustocreate) =
496: &Apache::createaccount::get_creation_controls($form{'udom'},$domconfig{'usercreation'});
497: my $defaultauth;
498: if (ref($cancreate) eq 'ARRAY') {
499: if (grep(/^login$/,@{$cancreate})) {
500: $defaultauth = 1;
501: }
502: }
503: my $clientcancheckhost = 1;
504: my $authhost=Apache::lonnet::authenticate($form{'uname'},$upass,
505: $form{'udom'},$defaultauth,
506: $clientcancheckhost);
1.149 raeburn 507:
1.136 kruse 508: # --------------------------------------------------------------------- Failed?
509:
510: if ($authhost eq 'no_host') {
511: &failed($r,'Username and/or password could not be authenticated.',
512: \%form);
513: return OK;
514: } elsif ($authhost eq 'no_account_on_host') {
515: if ($defaultauth) {
516: my $domdesc = &Apache::lonnet::domain($form{'udom'},'description');
517: unless (&check_can_host($r,\%form,'no_account_on_host',$domdesc)) {
518: return OK;
519: }
520: my $start_page =
521: &Apache::loncommon::start_page('Create a user account in LON-CAPA');
522: my $lonhost = $r->dir_config('lonHostID');
523: my $origmail = $Apache::lonnet::perlvar{'lonSupportEMail'};
524: my $contacts =
525: &Apache::loncommon::build_recipient_list(undef,'helpdeskmail',
526: $form{'udom'},$origmail);
527: my ($contact_email) = split(',',$contacts);
528: my $output =
529: &Apache::createaccount::username_check($form{'uname'},$form{'udom'},
530: $domdesc,'',$lonhost,
531: $contact_email,$contact_name,
532: undef,$statustocreate);
533: &Apache::loncommon::content_type($r,'text/html');
534: $r->send_http_header;
535: &Apache::createaccount::print_header($r,$start_page);
536: $r->print('<h3>'.&mt('Account creation').'</h3>'.
537: &mt('Although your username and password were authenticated, you do not currently have a LON-CAPA account at this institution.').'<br />'.
538: $output.&Apache::loncommon::end_page());
539: return OK;
540: } else {
541: &failed($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);
542: return OK;
543: }
544: }
545:
546: if (($firsturl eq '') ||
547: ($firsturl=~/^\/adm\/(logout|remote)/)) {
548: $firsturl='/adm/roles';
549: }
550:
551: my $hosthere;
552: if ($form{'iptoken'}) {
1.138 raeburn 553: my %sessiondata = &Apache::lonnet::tmpget($form{'iptoken'});
554: my $delete = &Apache::lonnet::tmpdel($form{'iptoken'});
1.136 kruse 555: if (($sessiondata{'domain'} eq $form{'udom'}) &&
556: ($sessiondata{'username'} eq $form{'uname'})) {
557: $hosthere = 1;
558: }
559: }
560:
561: # --------------------------------- Are we attempting to login as somebody else?
562: if ($form{'suname'}) {
1.145 raeburn 563: my ($suname,$sudom,$sudomref);
564: $suname = $form{'suname'};
565: $sudom = $form{'udom'};
566: if ($form{'sudom'}) {
567: unless ($sudom eq $form{'sudom'}) {
568: if (&Apache::lonnet::domain($form{'sudom'})) {
569: $sudomref = [$form{'sudom'}];
570: $sudom = $form{'sudom'};
571: }
572: }
573: }
1.136 kruse 574: # ------------ see if the original user has enough privileges to pull this stunt
1.145 raeburn 575: if (&Apache::lonnet::privileged($form{'uname'},$form{'udom'},$sudomref)) {
1.136 kruse 576: # ---------------------------------------------------- see if the su-user exists
1.145 raeburn 577: unless (&Apache::lonnet::homeserver($suname,$sudom) eq 'no_host') {
1.136 kruse 578: # ------------------------------ see if the su-user is not too highly privileged
1.146 raeburn 579: if (&Apache::lonnet::privileged($suname,$sudom)) {
580: &Apache::lonnet::logthis('Attempted switch user to privileged user');
581: } else {
582: my $noprivswitch;
1.145 raeburn 583: #
584: # su-user's home server and user's home server must have one of:
1.147 raeburn 585: # (a) same domain
586: # (b) same primary library server for the two domains
587: # (c) same "internet domain" for primary library server(s) for home servers' domains
1.145 raeburn 588: #
1.148 raeburn 589: my $suprim = &Apache::lonnet::domain($sudom,'primary');
590: my $suintdom = &Apache::lonnet::internet_dom($suprim);
1.145 raeburn 591: unless ($sudom eq $form{'udom'}) {
1.148 raeburn 592: my $uprim = &Apache::lonnet::domain($form{'udom'},'primary');
593: my $uintdom = &Apache::lonnet::internet_dom($uprim);
1.145 raeburn 594: unless ($suprim eq $uprim) {
595: unless ($suintdom eq $uintdom) {
596: &Apache::lonnet::logthis('Attempted switch user '
1.146 raeburn 597: .'to user with different "internet domain".');
598: $noprivswitch = 1;
1.145 raeburn 599: }
600: }
601: }
602:
1.146 raeburn 603: unless ($noprivswitch) {
604: #
605: # server where log-in occurs must have same "internet domain" as su-user's home
606: # server
607: #
608: my $lonhost = $r->dir_config('lonHostID');
609: my $hostintdom = &Apache::lonnet::internet_dom($lonhost);
1.148 raeburn 610: if ($hostintdom ne $suintdom) {
1.146 raeburn 611: &Apache::lonnet::logthis('Attempted switch user on a '
612: .'server with a different "internet domain".');
613: } else {
614:
1.136 kruse 615: # -------------------------------------------------------- actually switch users
1.145 raeburn 616:
1.146 raeburn 617: &Apache::lonnet::logperm('User '.$form{'uname'}.' at '.
618: $form{'udom'}.' logging in as '.$suname.':'.$sudom);
619: $form{'uname'}=$suname;
620: if ($form{'udom'} ne $sudom) {
621: $form{'udom'}=$sudom;
622: }
623: }
1.145 raeburn 624: }
1.136 kruse 625: }
626: }
627: } else {
628: &Apache::lonnet::logthis('Non-privileged user attempting switch user');
629: }
630: }
631:
632: my ($is_balancer,$otherserver);
633:
634: unless ($hosthere) {
635: ($is_balancer,$otherserver) =
1.141 raeburn 636: &Apache::lonnet::check_loadbalancing($form{'uname'},$form{'udom'},'login');
637: if ($is_balancer) {
638: if ($otherserver eq '') {
639: my $lowest_load;
640: ($otherserver,undef,undef,undef,$lowest_load) = &Apache::lonnet::choose_server($form{'udom'});
641: if ($lowest_load > 100) {
642: $otherserver = &Apache::lonnet::spareserver($lowest_load,$lowest_load,1,$form{'udom'});
643: }
644: }
645: if ($otherserver ne '') {
646: my @hosts = &Apache::lonnet::current_machine_ids();
647: if (grep(/^\Q$otherserver\E$/,@hosts)) {
648: $hosthere = $otherserver;
649: }
650: }
651: }
1.136 kruse 652: }
653:
1.141 raeburn 654: if (($is_balancer) && (!$hosthere)) {
1.136 kruse 655: if ($otherserver) {
656: &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef,
657: \%form);
658: my $switchto = '/adm/switchserver?otherserver='.$otherserver;
659: if (($firsturl) && ($firsturl ne '/adm/switchserver') && ($firsturl ne '/adm/roles')) {
1.156 raeburn 660: $switchto .= '&origurl='.$firsturl; #should escape
1.136 kruse 661: }
662: if ($form{'role'}) {
663: $switchto .= '&role='.$form{'role'};
664: }
665: if ($form{'symb'}) {
666: $switchto .= '&symb='.$form{'symb'};
667: }
1.156 raeburn 668: if ($form{'linkprot'}) {
669: $env{'request.linkprot'} = $form{'linkprot'};
1.157 ! raeburn 670: } elsif ($form{'firsturl'} =~ m{^/tiny/$match_domain/\w+$}) {
! 671: if ($form{'linkkey'}) {
! 672: $env{'request.linkkey'} = $form{'linkkey'};
! 673: }
! 674: $env{'request.deeplink.login'} = $form{'firsturl'};
1.156 raeburn 675: }
1.136 kruse 676: $r->internal_redirect($switchto);
677: } else {
678: $r->print(&noswitch());
679: }
680: return OK;
681: } else {
682: if (!&check_can_host($r,\%form,$authhost)) {
683: my ($otherserver) = &Apache::lonnet::choose_server($form{'udom'});
684: if ($otherserver) {
685: &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef,
686: \%form);
687: my $switchto = '/adm/switchserver?otherserver='.$otherserver;
688: if (($firsturl) && ($firsturl ne '/adm/switchserver') && ($firsturl ne '/adm/roles')) {
1.156 raeburn 689: $switchto .= '&origurl='.$firsturl; #should escape
1.136 kruse 690: }
691: if ($form{'role'}) {
692: $switchto .= '&role='.$form{'role'};
693: }
694: if ($form{'symb'}) {
695: $switchto .= '&symb='.$form{'symb'};
696: }
1.156 raeburn 697: if ($form{'linkprot'}) {
698: $env{'request.linkprot'} = $form{'linkprot'};
1.157 ! raeburn 699: } elsif ($form{'firsturl'} =~ m{^/tiny/$match_domain/\w+$}) {
! 700: if ($form{'linkkey'}) {
! 701: $env{'request.linkkey'} = $form{'linkkey'};
! 702: }
! 703: $env{'request.deeplink.login'} = $form{'firsturl'};
! 704:
1.156 raeburn 705: }
1.136 kruse 706: $r->internal_redirect($switchto);
707: } else {
708: $r->print(&noswitch());
709: }
710: return OK;
711: }
712:
713: # ------------------------------------------------------- Do the load balancing
714:
715: # ---------------------------------------------------------- Determine own load
716: my $loadlim = $r->dir_config('lonLoadLim');
717: my $loadavg;
718: {
719: my $loadfile=Apache::File->new('/proc/loadavg');
720: $loadavg=<$loadfile>;
721: }
722: $loadavg =~ s/\s.*//g;
723: my $loadpercent=sprintf("%.1f",100*$loadavg/$loadlim);
724: my $userloadpercent=&Apache::lonnet::userload();
725:
726: # ---------------------------------------------------------- Are we overloaded?
727: if ((($userloadpercent>100.0)||($loadpercent>100.0))) {
728: my $unloaded=Apache::lonnet::spareserver($loadpercent,$userloadpercent,1,$form{'udom'});
729: if (!$unloaded) {
730: ($unloaded) = &Apache::lonnet::choose_server($form{'udom'});
731: }
732: if ($unloaded) {
733: &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',
734: undef,\%form);
1.156 raeburn 735: if ($form{'linkprot'}) {
736: $env{'request.linkprot'} = $form{'linkprot'};
1.157 ! raeburn 737: } elsif ($form{'firsturl'} =~ m{^/tiny/$match_domain/\w+$}) {
! 738: if ($form{'linkkey'}) {
! 739: $env{'request.linkkey'} = $form{'linkkey'};
! 740: }
! 741: $env{'request.deeplink.login'} = $form{'firsturl'};
1.156 raeburn 742: }
1.136 kruse 743: $r->internal_redirect('/adm/switchserver?otherserver='.$unloaded.'&origurl='.$firsturl);
744: return OK;
745: }
746: }
1.141 raeburn 747: if (($is_balancer) && ($hosthere)) {
748: $form{'noloadbalance'} = $hosthere;
749: }
1.156 raeburn 750: my $extra_env;
751: if ($form{'linkprot'}) {
752: my ($linkprotector,$uri) = split(/:/,$form{'linkprot'},2);
753: if ($linkprotector) {
754: $extra_env = {'user.linkprotector' => $linkprotector,
755: 'user.linkproturi' => $uri,};
756: }
1.157 ! raeburn 757: } elsif ($form{'firsturl'} =~ m{^/tiny/$match_domain/\w+$}) {
! 758: if ($form{'linkkey'}) {
! 759: $extra_env = {'user.deeplinkkey' => $form{'linkkey'},
! 760: 'user.keyedlinkuri' => $form{'firsturl'},
! 761: 'request.deeplink.login' => $form{'firsturl'}};
! 762: } else {
! 763: $extra_env = {'request.deeplink.login' => $form{'firsturl'}};
! 764: }
1.156 raeburn 765: }
766: &success($r,$form{'uname'},$form{'udom'},$authhost,$firsturl,$extra_env,
1.136 kruse 767: \%form);
768: return OK;
769: }
770: }
771:
772: sub check_can_host {
773: my ($r,$form,$authhost,$domdesc) = @_;
774: return unless (ref($form) eq 'HASH');
775: my $canhost = 1;
776: my $lonhost = $r->dir_config('lonHostID');
777: my $udom = $form->{'udom'};
778: my @intdoms;
779: my $internet_names = &Apache::lonnet::get_internet_names($lonhost);
780: if (ref($internet_names) eq 'ARRAY') {
781: @intdoms = @{$internet_names};
782: }
783: my $uprimary_id = &Apache::lonnet::domain($udom,'primary');
784: my $uint_dom = &Apache::lonnet::internet_dom($uprimary_id);
785: unless ($uint_dom ne '' && grep(/^\Q$uint_dom\E$/,@intdoms)) {
786: my $machine_dom = &Apache::lonnet::host_domain($lonhost);
787: my $hostname = &Apache::lonnet::hostname($lonhost);
788: my $serverhomeID = &Apache::lonnet::get_server_homeID($hostname);
789: my $serverhomedom = &Apache::lonnet::host_domain($serverhomeID);
790: my %defdomdefaults = &Apache::lonnet::get_domain_defaults($serverhomedom);
791: my %udomdefaults = &Apache::lonnet::get_domain_defaults($udom);
792: my $loncaparev;
793: if ($authhost eq 'no_account_on_host') {
794: $loncaparev = &Apache::lonnet::get_server_loncaparev($machine_dom);
795: } else {
796: $loncaparev = &Apache::lonnet::get_server_loncaparev($machine_dom,$lonhost);
797: }
798: $canhost = &Apache::lonnet::can_host_session($udom,$lonhost,$loncaparev,
799: $udomdefaults{'remotesessions'},
800: $defdomdefaults{'hostedsessions'});
801: }
802: unless ($canhost) {
803: if ($authhost eq 'no_account_on_host') {
804: my $checkloginvia = 1;
805: my ($login_host,$hostname) =
806: &Apache::lonnet::choose_server($udom,$checkloginvia);
807: &Apache::loncommon::content_type($r,'text/html');
808: $r->send_http_header;
809: if ($login_host ne '') {
810: my $protocol = $Apache::lonnet::protocol{$login_host};
811: $protocol = 'http' if ($protocol ne 'https');
812: my $newurl = $protocol.'://'.$hostname.'/adm/createaccount';
1.156 raeburn 813: #FIXME Should preserve where user was going and linkprot by setting ltoken at $login_host
1.136 kruse 814: $r->print(&Apache::loncommon::start_page('Create a user account in LON-CAPA').
815: '<h3>'.&mt('Account creation').'</h3>'.
816: &mt('You do not currently have a LON-CAPA account at this institution.').'<br />'.
817: '<p>'.&mt('You will be able to create one by logging into a LON-CAPA server within the [_1] domain.',$domdesc).'</p>'.
818: '<p>'.&mt('[_1]Log in[_2]','<a href="'.$newurl.'">','</a>').
819: &Apache::loncommon::end_page());
820: } else {
821: $r->print(&Apache::loncommon::start_page('Access to LON-CAPA unavailable').
822: '<h3>'.&mt('Account creation unavailable').'</h3>'.
823: &mt('You do not currently have a LON-CAPA account at this institution.').'<br />'.
824: '<p>'.&mt('Currently a LON-CAPA server is not available within the [_1] domain for you to log-in to, to create an account.',$domdesc).'</p>'.
825: &Apache::loncommon::end_page());
826: }
827: } else {
828: &success($r,$form->{'uname'},$udom,$authhost,'noredirect',undef,
829: $form);
1.156 raeburn 830: if ($form->{'linkprot'}) {
831: $env{'request.linkprot'} = $form->{'linkprot'};
1.157 ! raeburn 832: } elsif ($form->{'firsturl'} =~ m{^/tiny/$match_domain/\w+$}) {
! 833: if ($form->{'linkkey'}) {
! 834: $env{'request.linkkey'} = $form->{'linkkey'};
! 835: }
! 836: $env{'request.deeplink.login'} = $form->{'firsturl'};
1.156 raeburn 837: }
1.136 kruse 838: my ($otherserver) = &Apache::lonnet::choose_server($udom);
839: $r->internal_redirect('/adm/switchserver?otherserver='.$otherserver);
840: }
841: }
842: return $canhost;
843: }
844:
845: sub noswitch {
846: my $result = &Apache::loncommon::start_page('Access to LON-CAPA unavailable').
847: '<h3>'.&mt('Session unavailable').'</h3>'.
848: &mt('This LON-CAPA server is unable to host your session.').'<br />'.
849: '<p>'.&mt('Currently no other LON-CAPA server is available to host your session either.').'</p>'.
850: &Apache::loncommon::end_page();
851: return $result;
852: }
853:
854: sub loginhelpdisplay {
855: my ($authdomain) = @_;
856: my $login_help = 1;
857: my $lang = &Apache::lonlocal::current_language();
858: if ($login_help) {
859: my $dom = $authdomain;
860: if ($dom eq '') {
861: $dom = &Apache::lonnet::default_login_domain();
862: }
863: my %domconfhash = &Apache::loncommon::get_domainconf($dom);
864: my $loginhelp_url;
865: if ($lang) {
866: $loginhelp_url = $domconfhash{$dom.'.login.helpurl_'.$lang};
867: if ($loginhelp_url ne '') {
868: return $loginhelp_url;
869: }
870: }
871: $loginhelp_url = $domconfhash{$dom.'.login.helpurl_nolang'};
872: if ($loginhelp_url ne '') {
873: return $loginhelp_url;
874: } else {
875: return '/adm/loginproblems.html';
876: }
877: }
878: return;
879: }
880:
881: 1;
882: __END__
883:
884:
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