File:  [LON-CAPA] / loncom / interface / createaccount.pm
Revision 1.17: download - view: text, annotated - select for diffs
Sat Jul 12 14:08:58 2008 UTC (15 years, 11 months ago) by raeburn
Branches: MAIN
CVS tags: HEAD
- Add &sso_logout_frag() to provide a link to logout of an SSO session if username creation is not possible.
- Moved some <br /> for a more compact display for SSO authenticated case.
- Typo in an <h4></h4> header line.

    1: # The LearningOnline Network
    2: # Allow visitors to create a user account with the username being either an 
    3: # institutional log-in ID (institutional authentication required - localauth
    4: #  or kerberos) or an e-mail address.
    5: #
    6: # $Id: createaccount.pm,v 1.17 2008/07/12 14:08:58 raeburn Exp $
    7: #
    8: # Copyright Michigan State University Board of Trustees
    9: #
   10: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
   11: #
   12: # LON-CAPA is free software; you can redistribute it and/or modify
   13: # it under the terms of the GNU General Public License as published by
   14: # the Free Software Foundation; either version 2 of the License, or
   15: # (at your option) any later version.
   16: #
   17: # LON-CAPA is distributed in the hope that it will be useful,
   18: # but WITHOUT ANY WARRANTY; without even the implied warranty of
   19: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   20: # GNU General Public License for more details.
   21: #
   22: # You should have received a copy of the GNU General Public License
   23: # along with LON-CAPA; if not, write to the Free Software
   24: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
   25: #
   26: # /home/httpd/html/adm/gpl.txt
   27: #
   28: # http://www.lon-capa.org/
   29: #
   30: #
   31: package Apache::createaccount;
   32: 
   33: use strict;
   34: use Apache::Constants qw(:common);
   35: use Apache::lonacc;
   36: use Apache::lonnet;
   37: use Apache::loncommon;
   38: use Apache::lonhtmlcommon;
   39: use Apache::lonlocal;
   40: use Apache::lonauth;
   41: use Apache::resetpw;
   42: use Authen::Captcha;
   43: use DynaLoader; # for Crypt::DES version
   44: use Crypt::DES;
   45: use LONCAPA qw(:DEFAULT :match);
   46: use HTML::Entities;
   47: 
   48: sub handler {
   49:     my $r = shift;
   50:     &Apache::loncommon::content_type($r,'text/html');
   51:     $r->send_http_header;
   52:     if ($r->header_only) {
   53:         return OK;
   54:     }
   55:     
   56:     my $domain;
   57: 
   58:     my $sso_username = $r->subprocess_env->get('REDIRECT_SSOUserUnknown');
   59:     my $sso_domain = $r->subprocess_env->get('REDIRECT_SSOUserDomain');
   60: 
   61:     if ($sso_username ne '' && $sso_domain ne '') {
   62:         $domain = $sso_domain; 
   63:     } else { 
   64:         $domain = &Apache::lonnet::default_login_domain();
   65:     }
   66:     my $domdesc = &Apache::lonnet::domain($domain,'description');
   67:     my $contact_name = &mt('LON-CAPA helpdesk');
   68:     my $origmail = $Apache::lonnet::perlvar{'lonSupportEMail'};
   69:     my $contacts =
   70:         &Apache::loncommon::build_recipient_list(undef,'helpdeskmail',
   71:                                                  $domain,$origmail);
   72:     my ($contact_email) = split(',',$contacts);
   73:     my $lonhost = $r->dir_config('lonHostID');
   74:     my $include = $r->dir_config('lonIncludes');
   75:     my $start_page;
   76: 
   77:     &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},['token','courseid']);
   78:     &Apache::lonacc::get_posted_cgi($r);
   79:     &Apache::lonlocal::get_language_handle($r);
   80: 
   81:     my $handle = &Apache::lonnet::check_for_valid_session($r);
   82:     if ($handle ne '') {
   83:         $start_page =
   84:             &Apache::loncommon::start_page('Already logged in');
   85:         my $end_page =
   86:             &Apache::loncommon::end_page();
   87:         $r->print($start_page."\n".'<h2>'.&mt('You are already logged in').'</h2>'.
   88:                   '<p>'.&mt('Please either [_1]continue the current session[_2] or [_3]logout[_4].','<a href="/adm/roles">','</a>','<a href="/adm/logout">','</a>').
   89:                   '</p><p><a href="/adm/loginproblems.html">'.&mt('Login problems?').'</a></p>'.$end_page);
   90:        return OK;
   91:     }
   92:     $start_page =
   93:         &Apache::loncommon::start_page('Create a user account in LON-CAPA','',
   94:                                        {'no_inline_link'   => 1,});
   95:     if ($env{'form.phase'} eq 'username_activation') {
   96:         if ($env{'form.udom'} ne '') {
   97:             $domain = $env{'form.udom'};
   98:         }
   99:     }
  100:     my @cancreate;
  101:     my %domconfig = &Apache::lonnet::get_dom('configuration',['usercreation'],$domain);
  102:     if (ref($domconfig{'usercreation'}) eq 'HASH') {
  103:         if (ref($domconfig{'usercreation'}{'cancreate'}) eq 'HASH') {
  104:             if (ref($domconfig{'usercreation'}{'cancreate'}{'selfcreate'}) eq 'ARRAY') {
  105:                 @cancreate = @{$domconfig{'usercreation'}{'cancreate'}{'selfcreate'}};
  106:             } elsif (($domconfig{'usercreation'}{'cancreate'}{'selfcreate'} ne 'none') &&
  107:                      ($domconfig{'usercreation'}{'cancreate'}{'selfcreate'} ne '')) {
  108:                 @cancreate = ($domconfig{'usercreation'}{'cancreate'}{'selfcreate'});
  109:             }
  110:         }
  111:     }
  112: 
  113:     if (@cancreate == 0) {
  114:         &print_header($r,$start_page);
  115:         my $output = '<h3>'.&mt('Account creation unavailable').'</h3>'.
  116:                      '<span class="LC_warning">'.
  117:                      &mt('Creation of a new user account using an e-mail address or an institutional log-in ID as username is not permitted at this institution ([_1]).',$domdesc).'</span><br /><br />';
  118:         $r->print($output);
  119:         $r->print(&Apache::loncommon::end_page());
  120:         return OK;
  121:     }
  122: 
  123:     my $courseid;
  124:     if (defined($env{'form.courseid'})) {
  125:         $courseid = &validate_course($env{'form.courseid'});
  126:     }
  127: 
  128:     if ($sso_username ne '') {
  129:         &print_header($r,$start_page);
  130:         my $msg;
  131:         if (grep(/^sso$/,@cancreate)) {
  132:             $msg = '<h3>'.&mt('Account creation').'</h3>'.
  133:                    &mt("Although your username and password were authenticated by your institution's Single Sign On system, you do not currently have a LON-CAPA account at this institution.").'<br />';
  134:             my ($output,$checkfail) = &username_check($sso_username,$domain,
  135:                                                       $domdesc,$courseid,
  136:                                                       $lonhost,$contact_email);
  137:             if ($checkfail) {
  138:                 $msg .= '<h4>'.&mt('Account creation unavailable').'</h4>';
  139:                 if ($checkfail eq 'username') {
  140:                     $msg .= '<span class="LC_warning">'.
  141:                             &mt('A LON-CAPA account may not be created with the username you use.').
  142:                             '</span><br /><br />'.$output;
  143:                 } elsif ($checkfail eq 'authtoken') {
  144:                     $msg .= '<span class="LC_error">'.&mt('Error creating token.').'</span>'.
  145:                             '<br />'.$output;
  146:                 }
  147:                 $msg .= &mt('Please contact the [_1] ([_2]) for assistance.',
  148:                             $contact_name,$contact_email).'<br /><hr />'.
  149:                         &sso_logout_frag($r,$domain);    
  150: 
  151:             } else {
  152:                 $msg .= '<br />'.&mt('To create one, use the table below to provide information about yourself (if appropriate), then click the "Create LON-CAPA account" button.').'<br />'.$output;
  153:             }
  154:         } else {
  155:             $msg = '<h3>'.&mt('Account creation unavailable').'</h3>'.
  156:                    '<span class="LC_warning">'.&mt("Although your username and password were authenticated by your institution's Single Sign On system, you do not currently have a LON-CAPA account at this institution, and you are not permitted to create one.").'</span><br /><br />'.&mt('Please contact the [_1] ([_2]) for assistance.',$contact_name,$contact_email).'<hr />'.
  157:                    &sso_logout_frag($r,$domain);
  158:         }
  159:         $r->print($msg);
  160:         $r->print(&Apache::loncommon::end_page());
  161:         return OK;
  162:     }
  163: 
  164:     my ($output,$nostart,$noend);
  165:     my $token = $env{'form.token'};
  166:     if ($token) {
  167:         ($output,$nostart,$noend) = 
  168:             &process_mailtoken($r,$token,$contact_name,$contact_email,$domain,
  169:                                $domdesc,$lonhost,$include,$start_page);
  170:         if ($nostart) {
  171:             if ($noend) {
  172:                 return OK;
  173:             } else {
  174:                 $r->print($output);
  175:                 $r->print(&Apache::loncommon::end_page());
  176:                 return OK;
  177:             }
  178:         } else {
  179:             &print_header($r,$start_page);
  180:             $r->print($output);
  181:             $r->print(&Apache::loncommon::end_page());
  182:             return OK;
  183:         }
  184:     }
  185: 
  186:     if ($env{'form.phase'} eq 'username_activation') {
  187:         (my $result,$output,$nostart) = 
  188:             &username_activation($r,$env{'form.uname'},$domain,$domdesc,
  189:                                  $lonhost,$courseid);
  190:         if ($result eq 'ok') {
  191:             if ($nostart) {
  192:                 return OK;
  193:             }
  194:         }
  195:         &print_header($r,$start_page);
  196:         $r->print($output);
  197:         $r->print(&Apache::loncommon::end_page());
  198:         return OK;
  199:     }
  200: 
  201:     &print_header($r,$start_page);
  202:     if ($env{'form.create_with_email'}) {
  203:         $output = &process_email_request($env{'form.useremail'},$domain,$domdesc,
  204:                                          $contact_name,$contact_email,\@cancreate,
  205:                                          $lonhost,$domconfig{'usercreation'},
  206:                                          $courseid);
  207:     } elsif ($env{'form.phase'} eq 'username_validation') {
  208:         $output = &username_validation($env{'form.uname'},$domain,$domdesc,
  209:                                        $contact_name,$contact_email,$courseid,
  210:                                        $lonhost);
  211:     } elsif (!$token) {
  212:         my $now=time;
  213:         if (grep(/^login$/,@cancreate)) {
  214:             my $jsh=Apache::File->new($include."/londes.js");
  215:             $r->print(<$jsh>);
  216:             $r->print(&javascript_setforms($now));
  217:         }
  218:         if (grep(/^email$/,@cancreate)) {
  219:             $r->print(&javascript_validmail());
  220:         }
  221:         $output = &print_username_form($domain,$domdesc,\@cancreate,$now,$lonhost,
  222:                                        $courseid); 
  223:     }
  224:     $r->print($output);
  225:     $r->print(&Apache::loncommon::end_page());
  226:     return OK;
  227: }
  228: 
  229: sub print_header {
  230:     my ($r,$start_page) = @_;
  231:     $r->print($start_page);
  232:     &Apache::lonhtmlcommon::clear_breadcrumbs();
  233:     &Apache::lonhtmlcommon::add_breadcrumb
  234:     ({href=>"/adm/createuser",
  235:       text=>"New username"});
  236:     $r->print(&Apache::lonhtmlcommon::breadcrumbs('Create account'));
  237:     return;
  238: }
  239: 
  240: sub validate_course {
  241:     my ($courseid) = @_;
  242:     my ($cdom,$cnum) = ($courseid =~ /^($match_domain)_($match_courseid)$/);
  243:     if (($cdom ne '') && ($cnum ne '')) {
  244:         if (&Apache::lonnet::is_course($cdom,$cnum)) {
  245:             return ($courseid);
  246:         }
  247:     }
  248:     return;
  249: }
  250: 
  251: sub javascript_setforms {
  252:     my ($now) =  @_;
  253:     my $js = <<ENDSCRIPT;
  254:  <script language="JavaScript">
  255:     function send() {
  256:         this.document.server.elements.uname.value = this.document.client.elements.uname.value;
  257:         uextkey=this.document.client.elements.uextkey.value;
  258:         lextkey=this.document.client.elements.lextkey.value;
  259:         initkeys();
  260: 
  261:         this.document.server.elements.upass.value
  262:             = crypted(this.document.client.elements.upass$now.value);
  263: 
  264:         this.document.client.elements.uname.value='';
  265:         this.document.client.elements.upass$now.value='';
  266: 
  267:         this.document.server.submit();
  268:         return false;
  269:     }
  270:  </script>
  271: ENDSCRIPT
  272:     return $js;
  273: }
  274: 
  275: sub javascript_checkpass {
  276:     my ($now) = @_;
  277:     my $nopass = &mt('You must enter a password.');
  278:     my $mismatchpass = &mt('The passwords you entered did not match.').'\\n'.
  279:                        &mt('Please try again.'); 
  280:     my $js = <<"ENDSCRIPT";
  281: <script type="text/javascript" language="JavaScript">
  282:     function checkpass() {
  283:         var upass = this.document.client.elements.upass$now.value;
  284:         var upasscheck = this.document.client.elements.upasscheck$now.value;
  285:         if (upass == '') {
  286:             alert("$nopass");
  287:             return;
  288:         }
  289:         if (upass == upasscheck) {
  290:             this.document.client.elements.upasscheck$now.value='';
  291:             send();
  292:             return;
  293:         } else {
  294:             alert("$mismatchpass");
  295:             return;
  296:         } 
  297:     }
  298: </script>
  299: ENDSCRIPT
  300:     return $js;
  301: }
  302: 
  303: sub javascript_validmail {
  304:     my %lt = &Apache::lonlocal::texthash (
  305:                email => 'The e-mail address you entered',
  306:                notv  => 'is not a valid e-mail address',
  307:     );
  308:     my $output =  "\n".'<script type="text/javascript">'."\n".
  309:                   &Apache::lonhtmlcommon::javascript_valid_email()."\n";
  310:     $output .= <<"ENDSCRIPT";
  311: function validate_email() {
  312:     field = document.createaccount.useremail;
  313:     if (validmail(field) == false) {
  314:         alert("$lt{'email'}: "+field.value+" $lt{'notv'}.");
  315:         return false;
  316:     }
  317:     return true;
  318: }
  319: ENDSCRIPT
  320:     $output .= "\n".'</script>'."\n";
  321:     return $output;
  322: }
  323: 
  324: sub print_username_form {
  325:     my ($domain,$domdesc,$cancreate,$now,$lonhost,$courseid) = @_;
  326:     my %lt = &Apache::lonlocal::texthash(
  327:                                          unam => 'username',
  328:                                          udom => 'domain',
  329:                                          uemail => 'Email address in LON-CAPA',
  330:                                          proc => 'Proceed');
  331:     my $output;
  332:     if (ref($cancreate) eq 'ARRAY') {
  333:         if (grep(/^login$/,@{$cancreate})) {
  334:             my %domdefaults = &Apache::lonnet::get_domain_defaults($domain);
  335:             if ((($domdefaults{'auth_def'} =~/^krb/) && ($domdefaults{'auth_arg_def'} ne '')) || ($domdefaults{'auth_def'} eq 'localauth')) {
  336:                 $output = '<div class="LC_left_float"><h3>'.&mt('Create account with a username provided by this institution').'</h3>';
  337:                 $output .= &mt('If you already have a log-in ID at this institution,[_1] you may be able to use it for LON-CAPA.','<br />').'<br /><br />'.&mt('Type in your log-in ID and password to find out.').'<br /><br />';
  338:                 my ($lkey,$ukey) = &Apache::lonpreferences::des_keys();
  339:                 my ($lextkey,$uextkey) = &getkeys($lkey,$ukey);
  340:                 my $logtoken=Apache::lonnet::reply('tmpput:'.$ukey.$lkey.'&createaccount',
  341:                                                    $lonhost);
  342:                 $output .= &serverform($logtoken,$lonhost,undef,$courseid);
  343:                 my $unameform = '<input type="text" name="uname" size="10" value="" />';
  344:                 my $upassform = '<input type="password" name="upass'.$now.'" size="10" />';
  345:                 my $submit_text = &mt('Create LON-CAPA account');
  346:                 $output .= '<form name="client" method="post" action="/adm/createaccount">'."\n". 
  347:                            &Apache::lonhtmlcommon::start_pick_box()."\n".
  348:                            &Apache::lonhtmlcommon::row_title(&mt('Log-in ID'),
  349:                                                         'LC_pick_box_title')."\n".
  350:                            $unameform."\n".
  351:                            &Apache::lonhtmlcommon::row_closure(1)."\n".
  352:                            &Apache::lonhtmlcommon::row_title(&mt('Password'),
  353:                                                         'LC_pick_box_title')."\n".
  354:                            $upassform."\n".'<br /><br />'."\n".
  355:                            '<input type="button" name="username_validation" value="'.
  356:                            $submit_text.'" onclick="javascript:send()" />'."\n". 
  357:                            &Apache::lonhtmlcommon::row_closure(1)."\n".
  358:                            &Apache::lonhtmlcommon::end_pick_box().'<br /><br />'."\n".
  359:                            '<input type="hidden" name="lextkey" value="'.$lextkey.'">'."\n".
  360:                            '<input type="hidden" name="uextkey" value="'.$uextkey.'">'."\n".
  361:                            '</form></div>';
  362:             }
  363:         }
  364:         if (grep(/^email$/,@{$cancreate})) {
  365:             $output .= '<div class="LC_left_float"><h3>'.&mt('Create account with an e-mail address as your username').'</h3>';
  366:             if (grep(/^login$/,@{$cancreate})) {
  367:                 $output .= &mt('Provide your e-mail address to request a LON-CAPA account,[_1] if you do not have a log-in ID at your institution.','<br />').'<br /><br />';
  368:             } else {
  369:                 $output .= '<br />';
  370:             }
  371:             my $emailform = '<input type="text" name="useremail" size="25" value="" />';
  372:             my $captchaform = &create_captcha();
  373:             my $submit_text = &mt('Request LON-CAPA account');
  374:             $output .=  '<form name="createaccount" method="post" onSubmit="return validate_email()" action="/adm/createaccount">'.
  375:                         &Apache::lonhtmlcommon::start_pick_box()."\n".
  376:                         &Apache::lonhtmlcommon::row_title(&mt('E-mail address'),
  377:                                                          'LC_pick_box_title')."\n".
  378:                         $emailform."\n".
  379:                         &Apache::lonhtmlcommon::row_closure(1).
  380:                         &Apache::lonhtmlcommon::row_title(&mt('Validation'),
  381:                                                          'LC_pick_box_title')."\n".
  382:                         $captchaform."\n".'<br /><br />';
  383:             if ($courseid ne '') {
  384:                 $output .= '<input type="hidden" name="courseid" value="'.$courseid.'"/>'."\n"; 
  385:             }
  386:             $output .= '<input type="submit" name="create_with_email" value="'. 
  387:                         $submit_text.'" />'.
  388:                         &Apache::lonhtmlcommon::row_closure(1).
  389:                         &Apache::lonhtmlcommon::end_pick_box().'<br /><br /></form>'.
  390:                         '</div>';
  391:         }
  392:     }
  393:     if ($output eq '') {
  394:         $output = &mt('Creation of a new LON-CAPA user account using an e-mail address or an institutional log-in ID as your username is not permitted at [_1].',$domdesc);
  395:     } else {
  396:         $output .= '<div class="LC_clear_float_footer"></div>';
  397:     }
  398:     return $output;
  399: }
  400: 
  401: sub process_email_request {
  402:     my ($useremail,$domain,$domdesc,$contact_name,$contact_email,$cancreate,
  403:         $server,$settings,$courseid) = @_;
  404:     my $useremail = $env{'form.useremail'};
  405:     my $output;
  406:     if (ref($cancreate) eq 'ARRAY') {
  407:         if (!grep(/^email$/,@{$cancreate})) {
  408:             $output = &invalid_state('noemails',$domdesc,
  409:                                      $contact_name,$contact_email);
  410:             return $output;
  411:         } elsif ($useremail !~ /^[^\@]+\@[^\@]+\.[^\@\.]+$/) {
  412:             $output = &invalid_state('baduseremail',$domdesc,
  413:                                      $contact_name,$contact_email);
  414:             return $output;
  415:         } else {
  416:             my $uhome = &Apache::lonnet::homeserver($useremail,$domain);
  417:             if ($uhome ne 'no_host') {
  418:                 $output = &invalid_state('existinguser',$domdesc,
  419:                                          $contact_name,$contact_email);
  420:                 return $output;
  421:             } else {
  422:                 my $code = $env{'form.code'};
  423:                 my $md5sum = $env{'form.crypt'};
  424:                 my %captcha_params = &captcha_settings();
  425:                 my $captcha = Authen::Captcha->new(
  426:                                   output_folder => $captcha_params{'output_dir'},
  427:                                   data_folder   => $captcha_params{'db_dir'},
  428:                                  );
  429:                 my $captcha_chk = $captcha->check_code($code,$md5sum);
  430:                 my %captcha_hash = (
  431:                                   0       => 'Code not checked (file error)',
  432:                                   -1      => 'Failed: code expired',
  433:                                   -2      => 'Failed: invalid code (not in database)',
  434:                                   -3      => 'Failed: invalid code (code does not match crypt)',
  435:                                    );
  436:                 if ($captcha_chk != 1) {
  437:                     $output = &invalid_state('captcha',$domdesc,$contact_name,
  438:                                              $contact_email,$captcha_hash{$captcha_chk});
  439:                     return $output;
  440:                 }
  441:                 my (%rulematch,%inst_results,%curr_rules,%got_rules,%alerts);
  442:                 my $uhome=&Apache::lonnet::homeserver($useremail,$domain);
  443:                 if ($uhome eq 'no_host') {
  444:                     my $checkhash;
  445:                     my $checks = { 'username' => 1 };
  446:                     $checkhash->{$useremail.':'.$domain} = { 'newuser' => 1, };
  447:                     &Apache::loncommon::user_rule_check($checkhash,$checks,
  448:                           \%alerts,\%rulematch,\%inst_results,\%curr_rules,
  449:                           \%got_rules);
  450:                     if (ref($alerts{'useremail'}) eq 'HASH') {
  451:                         if (ref($alerts{'useremail'}{$domain}) eq 'HASH') {
  452:                             if ($alerts{'username'}{$domain}{$useremail}) {
  453:                                 $output = &invalid_state('userrules',$domdesc,
  454:                                                          $contact_name,$contact_email);
  455:                                 return $output;
  456:                             }
  457:                         }
  458:                     }
  459:                     my $format_msg = 
  460:                         &guest_format_check($useremail,$domain,$cancreate,
  461:                                             $settings);
  462:                     if ($format_msg) {
  463:                         $output = &invalid_state('userformat',$domdesc,$contact_name,
  464:                                                  $contact_email,$format_msg);
  465:                         return $output;
  466:                     }
  467:                 }
  468:             }
  469:         }
  470:         $output = &send_token($domain,$useremail,$server,$domdesc,$contact_name,
  471:                           $contact_email,$courseid);
  472:     }
  473:     return $output;
  474: }
  475: 
  476: sub send_token {
  477:     my ($domain,$email,$server,$domdesc,$contact_name,$contact_email,$courseid) = @_;
  478:     my $msg = '<h3>'.&mt('Account creation status').'</h3>'.
  479:               &mt('Thank you for your request to create a new LON-CAPA account.').
  480:               '<br /><br />';
  481:     my $now = time;
  482:     my %info = ('ip'         => $ENV{'REMOTE_ADDR'},
  483:                 'time'       => $now,
  484:                 'domain'     => $domain,
  485:                 'username'   => $email,
  486:                 'courseid'   => $courseid);
  487:     my $token = &Apache::lonnet::tmpput(\%info,$server);
  488:     if ($token !~ /^error/ && $token ne 'no_such_host') {
  489:         my $esc_token = &escape($token);
  490:         my $mailmsg = &mt('A request was submitted on [_1] for creation of a LON-CAPA account at the following institution: [_2].',localtime(time),$domdesc).' '.
  491:              &mt('To complete this process please open a web browser and enter the following'
  492:                 .' URL in the address/location box: [_1]'
  493:                 ,&Apache::lonnet::absolute_url().'/adm/createaccount?token='.$esc_token);
  494:         my $result = &Apache::resetpw::send_mail($domdesc,$email,$mailmsg,$contact_name,
  495:                                                  $contact_email);
  496:         if ($result eq 'ok') {
  497:             $msg .= &mt('A message has been sent to the e-mail address you provided.').'<br />'.&mt('The message includes the web address for the link you will use to complete the account creation process.').'<br />'.&mt("The link included in the message will be valid for the next [_1]two[_2] hours.",'<b>','</b>');
  498:         } else {
  499:             $msg .= '<span class="LC_error">'.
  500:                     &mt('An error occurred when sending a message to the e-mail address you provided.').'</span><br />'.
  501:                     ' '.&mt('Please contact the [_1] ([_2]) for assistance.',$contact_name,$contact_email);
  502:         }
  503:     } else {
  504:         $msg .= '<span class="LC_error">'.
  505:                 &mt('An error occurred creating a token required for the account creation process.').'</span><br />'.
  506:                 ' '.&mt('Please contact the [_1] ([_2]) for assistance.',$contact_name,$contact_email);
  507:     }
  508:     return $msg;
  509: }
  510: 
  511: sub process_mailtoken {
  512:     my ($r,$token,$contact_name,$contact_email,$domain,$domdesc,$lonhost,
  513:         $include,$start_page) = @_;
  514:     my ($msg,$nostart,$noend);
  515:     my %data = &Apache::lonnet::tmpget($token);
  516:     my $now = time;
  517:     if (keys(%data) == 0) {
  518:         $msg = &mt('Sorry, the URL you provided to complete creation of a new LON-CAPA account was invalid.')
  519:                .' '.&mt('Either the token included in the URL has been deleted or the URL you provided was invalid.')
  520:                .' '.&mt('Please submit a [_1]new request[_2] for account creation and follow the new link page included in the e-mail that will be sent to you.','<a href="/adm/createaccount">','</a>');
  521:         return $msg;
  522:     }
  523:     if (($data{'time'} =~ /^\d+$/) &&
  524:         ($data{'domain'} ne '') &&
  525:         ($data{'username'}  =~ /^[^\@]+\@[^\@]+\.[^\@\.]+$/)) {
  526:         if ($now - $data{'time'} < 7200) {
  527:             if ($env{'form.phase'} eq 'createaccount') {
  528:                 my ($result,$output) = &create_account($r,$domain,$lonhost,
  529:                                                        $data{'username'},$domdesc);
  530:                 if ($result eq 'ok') {
  531:                     $msg = $output; 
  532:                     my $shownow = &Apache::lonlocal::locallocaltime($now);
  533:                     my $mailmsg = &mt('A LON-CAPA account for the institution: [_1] has been created [_2] from IP address: [_3].  If you did not perform this action or authorize it, please contact the [_4] ([_5]).',$domdesc,$shownow,$ENV{'REMOTE_ADDR'},$contact_name,$contact_email)."\n";
  534:                     my $mailresult = &Apache::resetpw::send_mail($domdesc,$data{'email'},
  535:                                                                  $mailmsg,$contact_name,
  536:                                                                  $contact_email);
  537:                     if ($mailresult eq 'ok') {
  538:                         $msg .= &mt('An e-mail confirming creation of your new LON-CAPA account has been sent to [_1].',$data{'username'});
  539:                     } else {
  540:                         $msg .= &mt('An error occurred when sending e-mail to [_1] confirming creation of your LON-CAPA account.',$data{'username'});
  541:                     }
  542:                     my %form = &start_session($r,$data{'username'},$domain, 
  543:                                               $lonhost,$data{'courseid'},
  544:                                               $token);
  545:                     $nostart = 1;
  546:                     $noend = 1;
  547:                 } else {
  548:                     $msg .= &mt('A problem occurred when attempting to create your new LON-CAPA account.')
  549:                            .'<br />'.$output
  550: #                           .&mt('Please contact the [_1] ([_2]) for assistance.',$contact_name,'<a href="mailto:'.$contact_email.'">'.$contact_email.'</a>');
  551:                            .&mt('Please contact the [_1] ([_2]) for assistance.',$contact_name,$contact_email);
  552:                 }
  553:                 my $delete = &Apache::lonnet::tmpdel($token);
  554:             } else {
  555:                 $msg .= &mt('Please provide user information and a password for your new account.').'<br />'.&mt('Your password, which must contain at least seven characters, will be sent to the LON-CAPA server in an encrypted form.').'<br />';
  556:                 $msg .= &print_dataentry_form($r,$domain,$lonhost,$include,$token,$now,$data{'username'},$start_page);
  557:                 $nostart = 1;
  558:             }
  559:         } else {
  560:             $msg = &mt('Sorry, the token generated when you requested creation of an account has expired.')
  561:                   .' '.&mt('Please submit a [_1]new request[_2] for account creation and follow the new link included in the e-mail that will be sent to you.','<a href="/adm/createaccount">','</a>');
  562:             }
  563:     } else {
  564:         $msg .= &mt('Sorry, the URL generated when you requested creation of an account contained incomplete information.')
  565:                .' '.&mt('Please submit a [_1]new request[_2] for account creation and follow the new link included in the e-mail that will be sent to you.','<a href="/adm/createaccount">','</a>');
  566:     }
  567:     return ($msg,$nostart,$noend);
  568: }
  569: 
  570: sub start_session {
  571:     my ($r,$username,$domain,$lonhost,$courseid,$token) = @_;
  572:     my %form = (
  573:                 uname => $username,
  574:                 udom  => $domain,
  575:                );
  576:     my $firsturl = '/adm/roles';
  577:     if (defined($courseid)) {
  578:         $courseid = &validate_course($courseid);
  579:         if ($courseid ne '') {
  580:             $form{'courseid'} = $courseid;
  581:             $firsturl = '/adm/selfenroll?cid='.$courseid;
  582:         }
  583:     }
  584:     if ($r->dir_config('lonBalancer') eq 'yes') {
  585:         &Apache::lonauth::success($r,$form{'uname'},$form{'udom'},
  586:                                   $lonhost,'noredirect',undef,\%form);
  587:         my $delete = &Apache::lonnet::tmpdel($token);
  588:         $r->internal_redirect('/adm/switchserver');
  589:     } else {
  590:         &Apache::lonauth::success($r,$form{'uname'},$form{'udom'},
  591:                                   $lonhost,$firsturl,undef,\%form);
  592:     }
  593:     return %form;
  594: }
  595: 
  596: 
  597: sub print_dataentry_form {
  598:     my ($r,$domain,$lonhost,$include,$mailtoken,$now,$username,$start_page) = @_;
  599:     my ($error,$output);
  600:     &print_header($r,$start_page);
  601:     if (open(my $jsh,"<$include/londes.js")) {
  602:         while(my $line = <$jsh>) {
  603:             $r->print($line);
  604:         }
  605:         close($jsh);
  606:         $output .= &javascript_setforms($now)."\n".&javascript_checkpass($now);
  607:         my ($lkey,$ukey) = &Apache::lonpreferences::des_keys();
  608:         my ($lextkey,$uextkey) = &getkeys($lkey,$ukey);
  609:         my $logtoken=Apache::lonnet::reply('tmpput:'.$ukey.$lkey.'&createaccount',
  610:                                            $lonhost);
  611:         my @userinfo = ('firstname','middlename','lastname','generation','id',
  612:                         'permanentemail');
  613:         my %lt=&Apache::lonlocal::texthash(
  614:                     'pd'             => "Personal Data",
  615:                     'firstname'      => "First Name",
  616:                     'middlename'     => "Middle Name",
  617:                     'lastname'       => "Last Name",
  618:                     'generation'     => "Generation",
  619:                     'permanentemail' => "Permanent e-mail address",
  620:                     'id'             => "ID/Student Number",
  621:                     'lg'             => "Login Data"
  622:         );
  623:         my %textboxsize = (
  624:                            firstname      => '15',
  625:                            middlename     => '15',
  626:                            lastname       => '15',
  627:                            generation     => '5',
  628:                            id             => '15',
  629:                           );
  630:         my $genhelp=&Apache::loncommon::help_open_topic('Generation');
  631:         $output .= '<div class="LC_left_float"><h3>'.$lt{'pd'}.'</h3>'.
  632:                   '<form name="server" method="post" target="_top" action="/adm/createaccount">'.
  633:                   &Apache::lonhtmlcommon::start_pick_box();
  634:         foreach my $item (@userinfo) {
  635:             my $rowtitle = $lt{$item};
  636:             if ($item eq 'generation') {
  637:                 $rowtitle = $genhelp.$rowtitle;
  638:             }
  639:             $output .= &Apache::lonhtmlcommon::row_title($rowtitle,undef,'LC_oddrow_value')."\n";
  640:             if ($item eq 'permanentemail') {
  641:                 $output .= $username;
  642:             } else {
  643:                 $output .= '<input type="text" name="c'.$item.'" size="'.$textboxsize{$item}.'" value="" />';
  644:             }
  645:             $output .= &Apache::lonhtmlcommon::row_closure(1);
  646:         }
  647:         $output .= &Apache::lonhtmlcommon::end_pick_box();
  648:         $output .= <<"ENDSERVERFORM";
  649:    <input type="hidden" name="logtoken" value="$logtoken" />
  650:    <input type="hidden" name="token" value="$mailtoken" />
  651:    <input type="hidden" name="serverid" value="$lonhost" />
  652:    <input type="hidden" name="uname" value="" />
  653:    <input type="hidden" name="upass" value="" />
  654:    <input type="hidden" name="phase" value="createaccount" />
  655:   </form></div>
  656: ENDSERVERFORM
  657:         my $upassone = '<input type="password" name="upass'.$now.'" size="10" />';
  658:         my $upasstwo = '<input type="password" name="upasscheck'.$now.'" size="10" />';
  659:         my $submit_text = &mt('Create LON-CAPA account');
  660:         $output .= '<div class="LC_left_float"><h3>'.$lt{'lg'}.'</h3>'."\n".
  661:                    '<form name="client" method="post" />'."\n".
  662:                    &Apache::lonhtmlcommon::start_pick_box()."\n".
  663:                    &Apache::lonhtmlcommon::row_title(&mt('Username'),
  664:                                                     'LC_pick_box_title')."\n".
  665:                    $username."\n".
  666:                    &Apache::lonhtmlcommon::row_closure(1)."\n".
  667:                    &Apache::lonhtmlcommon::row_title(&mt('Password'),
  668:                                                     'LC_pick_box_title')."\n".
  669:                    $upassone."\n".
  670:                    &Apache::lonhtmlcommon::row_closure(1)."\n".
  671:                    &Apache::lonhtmlcommon::row_title(&mt('Confirm password'),
  672:                                                 'LC_pick_box_title')."\n".
  673:                    $upasstwo."\n".
  674:                    &Apache::lonhtmlcommon::row_closure(1)."\n".
  675:                    &Apache::lonhtmlcommon::end_pick_box()."\n".
  676:                    '<input type="hidden" name="uname" value="'.$username.'">'."\n".
  677:                    '<input type="hidden" name="lextkey" value="'.$lextkey.'">'."\n".
  678:                    '<input type="hidden" name="uextkey" value="'.$uextkey.'">'."\n".
  679:                    '</form></div>'."\n".
  680:                    '<div class="LC_clear_float_footer"><br /><br />'."\n".
  681:                    '<form name="buttonform">'."\n".
  682:                    '<input type="button" name="createaccount" value="'.
  683:                    $submit_text.'" onclick="javascript:checkpass();" /></form></div>';
  684:     } else {
  685:         $output = &mt('Could not load javascript file [_1]','<tt>londes.js</tt>');
  686:     }
  687:     return $output;
  688: }
  689: 
  690: sub create_account {
  691:     my ($r,$domain,$lonhost,$username,$domdesc) = @_;
  692:     my ($retrieved,$output,$upass) = &process_credentials($env{'form.logtoken'},
  693:                                                           $env{'form.serverid'}); 
  694:     # Error messages
  695:     my $error     = '<span class="LC_error">'.&mt('Error:').' ';
  696:     my $end       = '</span><br /><br />';
  697:     my $rtnlink   = '<a href="javascript:history.back();" />'.
  698:                     &mt('Return to previous page').'</a>'.
  699:                     &Apache::loncommon::end_page();
  700:     if ($retrieved eq 'ok') {
  701:         if ($env{'form.cid'} ne '') {
  702:             my ($result,$userchkmsg) = &check_id($username,$domain,$domdesc);
  703:             if ($result eq 'fail') {
  704:                 $output = $error.&mt('Invalid ID format').$end.
  705:                           $userchkmsg.$rtnlink;
  706:                 return ('fail',$output);
  707:             }
  708:         }
  709:     } else {
  710:         return ('fail',$error.$output.$end.$rtnlink);
  711:     }
  712:     # Call modifyuser
  713:     my $result = 
  714:         &Apache::lonnet::modifyuser($domain,$username,$env{'form.cid'},
  715:                                     'internal',$upass,$env{'form.cfirstname'},
  716:                                     $env{'form.cmiddlename'},$env{'form.clastname'},
  717:                                     $env{'form.cgeneration'},undef,undef,$username);
  718:     $output = &mt('Generating user: [_1]',$result);
  719:     my $uhome = &Apache::lonnet::homeserver($username,$domain);
  720:     $output .= '<br />'.&mt('Home server: [_1]',$uhome).' '.
  721:               &Apache::lonnet::hostname($uhome).'<br /><br />';
  722:     return ('ok',$output);
  723: }
  724: 
  725: sub username_validation {
  726:     my ($username,$domain,$domdesc,$contact_name,$contact_email,$courseid,$lonhost) = @_;
  727:     my ($retrieved,$output,$upass);
  728: 
  729:     $username= &LONCAPA::clean_username($username);
  730:     $domain = &LONCAPA::clean_domain($domain);
  731:     my $uhome = &Apache::lonnet::homeserver($username,$domain);
  732: 
  733:     if ($uhome ne 'no_host') {
  734:         $output = &invalid_state('existinguser',$domdesc,
  735:                                  $contact_name,$contact_email);
  736:         return $output;
  737:     }
  738:     ($retrieved,$output,$upass) = &process_credentials($env{'form.logtoken'},
  739:                                                        $env{'form.serverid'});
  740:     if ($retrieved eq 'ok') {
  741:         my $primlibserv = &Apache::lonnet::domain($domain,'primary');
  742:         my $authok;
  743:         my %domdefaults = &Apache::lonnet::get_domain_defaults($domain);
  744:         if ((($domdefaults{'auth_def'} =~/^krb(4|5)$/) && ($domdefaults{'auth_arg_def'} ne '')) || ($domdefaults{'auth_def'} eq 'localauth')) {
  745:             my $checkdefauth = 1;
  746:             $authok = 
  747:                 &Apache::lonnet::reply("encrypt:auth:$domain:$username:$upass:$checkdefauth",$primlibserv);
  748:         } else {
  749:             $authok = 'non_authorized';
  750:         }
  751:         if ($authok eq 'authorized') {
  752:             ($output,undef) = &username_check($username,$domain,$domdesc,
  753:                                               $courseid,$lonhost,$contact_email); 
  754:         } else {
  755:             $output = '<div class="LC_warning">'
  756:                      .&mt('Username and/or password could not be authenticated.')
  757:                      .'</div>'
  758:                      .&mt('Please check the username and password.'); 
  759:         }
  760:     }
  761:     return $output;
  762: }
  763: 
  764: sub username_check {
  765:     my ($username,$domain,$domdesc,$courseid,$lonhost,$contact_email) = @_;
  766:     my (%rulematch,%inst_results,$newuser,%alerts,%curr_rules,%got_rules);
  767:     $newuser = 1;
  768:     my $checkhash;
  769:     my $checks = { 'username' => 1 };
  770:     $checkhash->{$username.':'.$domain} = { 'newuser' => $newuser };
  771:     &Apache::loncommon::user_rule_check($checkhash,$checks,\%alerts,\%rulematch,
  772:                                         \%inst_results,\%curr_rules,\%got_rules);
  773:     if (ref($alerts{'username'}) eq 'HASH') {
  774:         if (ref($alerts{'username'}{$domain}) eq 'HASH') {
  775:             if ($alerts{'username'}{$domain}{$username}) {
  776:                 my ($userchkmsg,$checkfail);
  777:                 if (ref($curr_rules{$domain}) eq 'HASH') {
  778:                     $userchkmsg =
  779:                         &Apache::loncommon::instrule_disallow_msg('username',$domdesc,1,
  780:                                                                   'selfcreate').
  781:                         &Apache::loncommon::user_rule_formats($domain,$domdesc,
  782:                                 $curr_rules{$domain}{'username'},'username');
  783:                     if ($userchkmsg) {
  784:                         $checkfail = 'username';
  785:                     }
  786:                 }
  787:                 return ($userchkmsg,$checkfail);
  788:             }
  789:         }
  790:     }
  791:     my $submit_text = &mt('Create LON-CAPA account');
  792:     my $output = '<form method="post" action="/adm/createaccount">'.
  793:                  &Apache::loncreateuser::personal_data_display($username,$domain,1,
  794:                                     undef,$inst_results{$username.':'.$domain}).
  795:                 '<br /><br /><input type="hidden" name="uname" value="'.$username.'" />'."\n".
  796:                 '<input type="hidden" name="udom" value="'.$domain.'" />'."\n".
  797:                 '<input type="hidden" name="phase" value="username_activation" />';
  798:     my $now = time;
  799:     my %info = ('ip'         => $ENV{'REMOTE_ADDR'},
  800:                 'time'       => $now,
  801:                 'domain'     => $domain,
  802:                 'username'   => $username);
  803:     my $authtoken = &Apache::lonnet::tmpput(\%info,$lonhost);
  804:     if ($authtoken !~ /^error/ && $authtoken ne 'no_such_host') {
  805:         $output .= '<input type="hidden" name="authtoken" value="'.&HTML::Entities::encode($authtoken,'&<>"').'" />';
  806:     } else {
  807:         $output = &mt('An error occurred when storing a token').'<br />'.
  808:                   &mt('You will not be able to proceed to the next stage of account creation').
  809:                   &linkto_email_help($contact_email,$domdesc);
  810:         return($output,'authtoken');
  811:     }
  812:     if ($courseid ne '') {
  813:         $output .= '<input type="hidden" name="courseid" value="'.$courseid.'" />';
  814:     }
  815:     $output .= '<input type="submit" name="newaccount" value="'.
  816:                $submit_text.'" /></form>';
  817:     return ($output,'');
  818: }
  819: 
  820: sub username_activation {
  821:     my ($r,$username,$domain,$domdesc,$lonhost,$courseid) = @_;
  822:     my $output;
  823:     my $error     = '<span class="LC_error">'.&mt('Error:').' ';
  824:     my $end       = '</span><br /><br />';
  825:     my $rtnlink   = '<a href="javascript:history.back();" />'.
  826:                     &mt('Return to previous page').'</a>'.
  827:                     &Apache::loncommon::end_page();
  828:     my %domdefaults = &Apache::lonnet::get_domain_defaults($domain);
  829:     my %data = &Apache::lonnet::tmpget($env{'form.authtoken'});
  830:     my $now = time;
  831:     my $earlyout;
  832:     my $timeout = 300;
  833:     if (keys(%data) == 0) {
  834:         $output = &mt('Sorry, your authentication has expired.');
  835:         $earlyout = 'fail';
  836:     }
  837:     if (($data{'time'} !~ /^\d+$/) ||
  838:         ($data{'domain'} ne $domain) || 
  839:         ($data{'username'} ne $username)) {
  840:         $earlyout = 'fail';
  841:         $output = &mt('The credentials you provided could not be verified.');   
  842:     } elsif ($now - $data{'time'} > $timeout) {
  843:         $earlyout = 'fail';
  844:         $output = &mt('Sorry, your authentication has expired.');
  845:     }
  846:     if ($earlyout ne '') {
  847:         $output .= '<br />'.&mt('Please [_1]start again[_2].','<a href="/adm/createaccount">','</a>');
  848:         return($earlyout,$output);
  849:     }
  850:     if ((($domdefaults{'auth_def'} =~/^krb(4|5)$/) && 
  851:          ($domdefaults{'auth_arg_def'} ne '')) || 
  852:         ($domdefaults{'auth_def'} eq 'localauth')) {
  853:         if ($env{'form.cid'} ne '') {
  854:             my ($result,$userchkmsg) = &check_id($username,$domain,$domdesc);
  855:             if ($result eq 'fail') {
  856:                 $output = $error.&mt('Invalid ID format').$end.
  857:                           $userchkmsg.$rtnlink;
  858:                 return ('fail',$output);
  859:             }
  860:         }
  861:         # Call modifyuser
  862:         my $result =
  863:             &Apache::lonnet::modifyuser($domain,$username,$env{'form.cid'},
  864:                           $domdefaults{'auth_def'},
  865:                           $domdefaults{'auth_arg_def'},$env{'form.cfirstname'},
  866:                           $env{'form.cmiddlename'},$env{'form.clastname'},
  867:                           $env{'form.cgeneration'},undef,undef,
  868:                           $env{'form.cpermanentemail'});
  869:         if ($result eq 'ok') {
  870:             my $delete = &Apache::lonnet::tmpdel($env{'form.authtoken'});
  871:             $output = &mt('A LON-CAPA account has been created for username: [_1] in domain: [_2].',$username,$domain);
  872:             my %form = &start_session($r,$username,$domain,$lonhost,$courseid);
  873:             my $nostart = 1;
  874:             return ('ok',$output,$nostart);
  875:         } else {
  876:             $output = &mt('Account creation failed for username: [_1] in domain: [_2].',$username,$domain).'<br /><span class="LC_error">'.&mt('Error: [_1]',$result).'</span>';
  877:             return ('fail',$output);
  878:         }
  879:     } else {
  880:         $output = &mt('User account creation is not available for the current default authentication type.')."\n";
  881:         return('fail',$output);
  882:     }
  883: }
  884: 
  885: sub check_id {
  886:     my ($username,$domain,$domdesc) = @_;
  887:     # Check ID format
  888:     my (%alerts,%rulematch,%inst_results,%curr_rules,%checkhash);
  889:     my %checks = ('id' => 1);
  890:     %{$checkhash{$username.':'.$domain}} = (
  891:                                             'newuser' => 1,
  892:                                             'id' => $env{'form.cid'},
  893:                                            );
  894:     &Apache::loncommon::user_rule_check(\%checkhash,\%checks,\%alerts,
  895:                                         \%rulematch,\%inst_results,\%curr_rules);
  896:     if (ref($alerts{'id'}) eq 'HASH') {
  897:         if (ref($alerts{'id'}{$domain}) eq 'HASH') {
  898:             if ($alerts{'id'}{$domain}{$env{'form.cid'}}) {
  899:                 my $userchkmsg;
  900:                 if (ref($curr_rules{$domain}) eq 'HASH') {
  901:                     $userchkmsg  =
  902:                         &Apache::loncommon::instrule_disallow_msg('id',
  903:                                                            $domdesc,1).
  904:                         &Apache::loncommon::user_rule_formats($domain,
  905:                               $domdesc,$curr_rules{$domain}{'id'},'id');
  906:                 }
  907:                 return ('fail',$userchkmsg);
  908:             }
  909:         }
  910:     }
  911:     return; 
  912: }
  913: 
  914: sub invalid_state {
  915:     my ($error,$domdesc,$contact_name,$contact_email,$msgtext) = @_;
  916:     my $msg = '<h3>'.&mt('Account creation unavailable').'</h3><span class="LC_error">';
  917:     if ($error eq 'baduseremail') {
  918:         $msg = &mt('The e-mail address you provided does not appear to be a valid address.');
  919:     } elsif ($error eq 'existinguser') {
  920:         $msg = &mt('The e-mail address you provided is already in use as a username in LON-CAPA at this institution.');
  921:     } elsif ($error eq 'userrules') {
  922:         $msg = &mt('Username rules for this LON-CAPA at this institution do not allow the e-mail address you provided to be used as a username.');
  923:     } elsif ($error eq 'userformat') {
  924:         $msg = &mt('The e-mail address you provided may not be used as a username at this LON-CAPA institution.');
  925:     } elsif ($error eq 'captcha') {
  926:         $msg = &mt('Validation of the code your entered failed.');
  927:     } elsif ($error eq 'noemails') {
  928:         $msg = &mt('Creation of a new user account using an e-mail address as username is not permitted at this LON-CAPA institution.');
  929:     }
  930:     $msg .= '</span>';
  931:     if ($msgtext) {
  932:         $msg .= '<br />'.$msgtext;
  933:     }
  934:     $msg .= &linkto_email_help($contact_email,$domdesc);
  935:     return $msg;
  936: }
  937: 
  938: sub linkto_email_help {
  939:     my ($contact_email,$domdesc) = @_;
  940:     my $msg;
  941:     if ($contact_email ne '') {
  942:         my $escuri = &HTML::Entities::encode('/adm/createaccount','&<>"');
  943:         $msg .= '<br />'.&mt('You may wish to contact the [_1]LON-CAPA helpdesk[_2] for [_3].','<a href="/adm/helpdesk?origurl='.$escuri.'">','</a>',$domdesc).'<br />';
  944:     } else {
  945:         $msg .= '<br />'.&mt('You may wish to send an e-mail to the server administrator: [_1] for [_2].',$Apache::lonnet::perlvar{'AdminEmail'},$domdesc).'<br />';
  946:     }
  947:     return $msg;
  948: }
  949: 
  950: sub create_captcha {
  951:     my ($output_dir,$db_dir) = @_;
  952:     my %captcha_params = &captcha_settings();
  953:     my $captcha = Authen::Captcha->new(
  954:                                        output_folder => $captcha_params{'output_dir'},
  955:                                        data_folder   => $captcha_params{'db_dir'},
  956:                                       );
  957:     my $md5sum = $captcha->generate_code($captcha_params{'numchars'});
  958:     my $output = '<input type="hidden" name="crypt" value="'.$md5sum.'" />'."\n".
  959:                  &mt('Type in the letters/numbers shown below').'&nbsp;'.
  960:                  '<input type="text" size="5" name="code" value="" /><br />'.
  961:                  '<img src="'.$captcha_params{'www_output_dir'}.'/'.$md5sum.'.png">';
  962:     return $output;
  963: }
  964: 
  965: sub captcha_settings {
  966:     my %captcha_params = ( 
  967:                            output_dir     => $Apache::lonnet::perlvar{'lonCaptchaDir'},
  968:                            www_output_dir => "/captchaspool",
  969:                            db_dir         => $Apache::lonnet::perlvar{'lonCaptchaDb'},
  970:                            numchars       => '5',
  971:                          );
  972:     return %captcha_params;
  973: }
  974: 
  975: sub getkeys {
  976:     my ($lkey,$ukey) = @_;
  977:     my $lextkey=hex($lkey);
  978:     if ($lextkey>2147483647) { $lextkey-=4294967296; }
  979: 
  980:     my $uextkey=hex($ukey);
  981:     if ($uextkey>2147483647) { $uextkey-=4294967296; }
  982:     return ($lextkey,$uextkey);
  983: }
  984: 
  985: sub serverform {
  986:     my ($logtoken,$lonhost,$mailtoken,$courseid) = @_;
  987:     my $output .= <<ENDSERVERFORM;
  988:   <form name="server" method="post" target="_top">
  989:    <input type="hidden" name="logtoken" value="$logtoken" />
  990:    <input type="hidden" name="token" value="$mailtoken" />
  991:    <input type="hidden" name="serverid" value="$lonhost" />
  992:    <input type="hidden" name="uname" value="" />
  993:    <input type="hidden" name="upass" value="" />
  994:    <input type="hidden" name="phase" value="username_validation" />
  995:    <input type="hidden" name="courseid" value="$courseid" />
  996:   </form>
  997: ENDSERVERFORM
  998:     return $output;
  999: }
 1000: 
 1001: sub process_credentials {
 1002:     my ($logtoken,$lonhost) = @_;
 1003:     my $tmpinfo=Apache::lonnet::reply('tmpget:'.$logtoken,$lonhost);
 1004:     my ($retrieved,$output,$upass);
 1005:     if (($tmpinfo=~/^error/) || ($tmpinfo eq 'con_lost')) {
 1006:         $output = &mt('Information needed to verify your login information is missing, inaccessible or expired.')
 1007:                  .'<br />'.&mt('You may need to reload the previous page to obtain a new token.');
 1008:         return ($retrieved,$output,$upass); 
 1009:     } else {
 1010:         my $reply = &Apache::lonnet::reply('tmpdel:'.$logtoken,$lonhost);
 1011:         if ($reply eq 'ok') {
 1012:             $retrieved = 'ok';
 1013:         } else {
 1014:             $output = &mt('Session could not be opened.');
 1015:         }
 1016:     }
 1017:     my ($key,$caller)=split(/&/,$tmpinfo);
 1018:     if ($caller eq 'createaccount') {
 1019:         $upass = &Apache::lonpreferences::des_decrypt($key,$env{'form.upass'});
 1020:     } else {
 1021:         $output = &mt('Unable to retrieve your log-in information - unexpected context');
 1022:     }
 1023:     return ($retrieved,$output,$upass);
 1024: }
 1025: 
 1026: sub guest_format_check {
 1027:     my ($useremail,$domain,$cancreate,$settings) = @_;
 1028:     my ($login,$format_match,$format_msg,@user_rules);
 1029:     if (ref($settings) eq 'HASH') {
 1030:         if (ref($settings->{'email_rule'}) eq 'ARRAY') {
 1031:             push(@user_rules,@{$settings->{'email_rule'}});
 1032:         }
 1033:     }
 1034:     if (@user_rules > 0) {
 1035:         my %rule_check = 
 1036:             &Apache::lonnet::inst_rulecheck($domain,$useremail,undef,
 1037:                                             'selfcreate',\@user_rules);
 1038:         if (keys(%rule_check) > 0) {
 1039:             foreach my $item (keys(%rule_check)) {
 1040:                 if ($rule_check{$item}) {
 1041:                     $format_match = 1;   
 1042:                     last;
 1043:                 }
 1044:             }
 1045:         }
 1046:     }
 1047:     if ($format_match) {
 1048:         ($login) = ($useremail =~ /^([^\@]+)\@/);
 1049:         $format_msg = '<br />'.&mt("Your e-mail address uses the same internet domain as your institution's LON-CAPA service.").'<br />'.&mt('Creation of a LON-CAPA account with this type of e-mail address as username is not permitted.').'<br />';
 1050:         if (ref($cancreate) eq 'ARRAY') {
 1051:             if (grep(/^login$/,@{$cancreate})) {
 1052:                 $format_msg .= &mt('You should request creation of a LON-CAPA account for a log-in ID of "[_1]" at your institution instead.',$login).'<br />'; 
 1053:             }
 1054:         }
 1055:     }
 1056:     return $format_msg;
 1057: }
 1058: 
 1059: sub sso_logout_frag {
 1060:     my ($r,$domain) = @_;
 1061:     my $endsessionmsg;
 1062:     if (defined($r->dir_config('lonSSOUserLogoutMessageFile_'.$domain))) {
 1063:         my $msgfile = $r->dir_config('lonSSOUserLogoutMessageFile_'.$domain);
 1064:         if (-e $msgfile) {
 1065:             open(my $fh,"<$msgfile");
 1066:             $endsessionmsg = join('',<$fh>);
 1067:             close($fh);
 1068:         }
 1069:     } elsif (defined($r->dir_config('lonSSOUserLogoutMessageFile'))) {
 1070:         my $msgfile = $r->dir_config('lonSSOUserLogoutMessageFile');
 1071:         if (-e $msgfile) {     
 1072:             open(my $fh,"<$msgfile");
 1073:             $endsessionmsg = join('',<$fh>);
 1074:             close($fh);
 1075:         }
 1076:     }
 1077:     return $endsessionmsg;
 1078: }
 1079: 
 1080: 1;

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