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Diff for /loncom/auth/lonauth.pm between versions 1.121.2.11 and 1.137

version 1.121.2.11, 2014/05/04 15:16:10 version 1.137, 2015/01/26 22:11:52
Line 1 Line 1
 # The LearningOnline Network  # The LearningOnline Network
 # User Authentication Module  # User Authentication Module
 #  #
 # $Id$  # $Id$
 #  #
 # Copyright Michigan State University Board of Trustees  # Copyright Michigan State University Board of Trustees
 #  #
 # This file is part of the LearningOnline Network with CAPA (LON-CAPA).  # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
 #  #
 # LON-CAPA is free software; you can redistribute it and/or modify  # LON-CAPA is free software; you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by  # it under the terms of the GNU General Public License as published by
 # the Free Software Foundation; either version 2 of the License, or  # the Free Software Foundation; either version 2 of the License, or
 # (at your option) any later version.  # (at your option) any later version.
 #  #
 # LON-CAPA is distributed in the hope that it will be useful,  # LON-CAPA is distributed in the hope that it will be useful,
 # but WITHOUT ANY WARRANTY; without even the implied warranty of  # but WITHOUT ANY WARRANTY; without even the implied warranty of
 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the  # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 # GNU General Public License for more details.  # GNU General Public License for more details.
 #  #
 # You should have received a copy of the GNU General Public License  # You should have received a copy of the GNU General Public License
 # along with LON-CAPA; if not, write to the Free Software  # along with LON-CAPA; if not, write to the Free Software
 # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA  # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 #  #
 # /home/httpd/html/adm/gpl.txt  # /home/httpd/html/adm/gpl.txt
 #  #
 # http://www.lon-capa.org/  # http://www.lon-capa.org/
 #  #
   
 package Apache::lonauth;  package Apache::lonauth;
   
 use strict;  use strict;
 use LONCAPA;  use LONCAPA;
 use Apache::Constants qw(:common);  use Apache::Constants qw(:common);
 use CGI qw(:standard);  use CGI qw(:standard);
 use DynaLoader; # for Crypt::DES version  use DynaLoader; # for Crypt::DES version
 use Crypt::DES;  use Crypt::DES;
 use Apache::loncommon();  use Apache::loncommon();
 use Apache::lonnet;  use Apache::lonnet;
 use Apache::lonmenu();  use Apache::lonmenu();
 use Apache::createaccount;  use Apache::createaccount;
 use Fcntl qw(:flock);  use Fcntl qw(:flock);
 use Apache::lonlocal;  use Apache::lonlocal;
 use Apache::File();  use Apache::File();
 use HTML::Entities;  use HTML::Entities;
     
 # ------------------------------------------------------------ Successful login  # ------------------------------------------------------------ Successful login
 sub success {  sub success {
     my ($r, $username, $domain, $authhost, $lowerurl, $extra_env,      my ($r, $username, $domain, $authhost, $lowerurl, $extra_env,
  $form) = @_;   $form) = @_;
   
 # ------------------------------------------------------------ Get cookie ready  # ------------------------------------------------------------ Get cookie ready
     my $cookie =      my $cookie =
  &Apache::loncommon::init_user_environment($r, $username, $domain,   &Apache::loncommon::init_user_environment($r, $username, $domain,
   $authhost, $form,    $authhost, $form,
   {'extra_env' => $extra_env,});    {'extra_env' => $extra_env,});
   
     my $public=($username eq 'public' && $domain eq 'public');      my $public=($username eq 'public' && $domain eq 'public');
   
     if ($public or $lowerurl eq 'noredirect') { return $cookie; }      if ($public or $lowerurl eq 'noredirect') { return $cookie; }
   
 # -------------------------------------------------------------------- Log this  # -------------------------------------------------------------------- Log this
   
     &Apache::lonnet::log($domain,$username,$authhost,      &Apache::lonnet::log($domain,$username,$authhost,
                          "Login $ENV{'REMOTE_ADDR'}");                           "Login $ENV{'REMOTE_ADDR'}");
   
 # ------------------------------------------------- Check for critical messages  # ------------------------------------------------- Check for critical messages
   
     my @what=&Apache::lonnet::dump('critical',$domain,$username);      my @what=&Apache::lonnet::dump('critical',$domain,$username);
     if ($what[0]) {      if ($what[0]) {
  if (($what[0] ne 'con_lost') && ($what[0]!~/^error\:/)) {   if (($what[0] ne 'con_lost') && ($what[0]!~/^error\:/)) {
     $lowerurl='/adm/email?critical=display';      $lowerurl='/adm/email?critical=display';
         }          }
     }      }
   
 # ------------------------------------------------------------ Get cookie ready  # ------------------------------------------------------------ Get cookie ready
     $cookie="lonID=$cookie; path=/";      $cookie="lonID=$cookie; path=/";
 # -------------------------------------------------------- Menu script and info  # -------------------------------------------------------- Menu script and info
     my $destination = $lowerurl;      my $destination = $lowerurl;
   
     if (defined($form->{role})) {      if (defined($form->{role})) {
         my $envkey = 'user.role.'.$form->{role};          my $envkey = 'user.role.'.$form->{role};
         my $now=time;          my $now=time;
         my $then=$env{'user.login.time'};          my $then=$env{'user.login.time'};
         my $refresh=$env{'user.refresh.time'};          my $refresh=$env{'user.refresh.time'};
         my $update=$env{'user.update.time'};          my $update=$env{'user.update.time'};
         if (!$update) {          if (!$update) {
             $update = $then;              $update = $then;
         }          }
         if (exists($env{$envkey})) {          if (exists($env{$envkey})) {
             my ($role,$where,$trolecode,$tstart,$tend,$tremark,$tstatus);              my ($role,$where,$trolecode,$tstart,$tend,$tremark,$tstatus);
             &Apache::lonnet::role_status($envkey,$update,$refresh,$now,\$role,\$where,              &Apache::lonnet::role_status($envkey,$update,$refresh,$now,\$role,\$where,
                                          \$trolecode,\$tstatus,\$tstart,\$tend);                                           \$trolecode,\$tstatus,\$tstart,\$tend);
             if ($tstatus eq 'is') {              if ($tstatus eq 'is') {
                 $destination  .= ($destination =~ /\?/) ? '&' : '?';                  $destination  .= ($destination =~ /\?/) ? '&' : '?';
                 my $newrole = &HTML::Entities::encode($form->{role},'"<>&');                  my $newrole = &HTML::Entities::encode($form->{role},'"<>&');
                 $destination .= 'selectrole=1&'.$newrole.'=1';                  $destination .= 'selectrole=1&'.$newrole.'=1';
             }              }
         }          }
     }      }
     if (defined($form->{symb})) {      if (defined($form->{symb})) {
         my $destsymb = $form->{symb};          my $destsymb = $form->{symb};
         $destination  .= ($destination =~ /\?/) ? '&' : '?';          $destination  .= ($destination =~ /\?/) ? '&' : '?';
         if ($destsymb =~ /___/) {          if ($destsymb =~ /___/) {
             # FIXME Need to deal with encrypted symbs and urls as needed.              # FIXME Need to deal with encrypted symbs and urls as needed.
             my ($map,$resid,$desturl)=split(/___/,$destsymb);              my ($map,$resid,$desturl)=split(/___/,$destsymb);
             unless ($desturl=~/^(adm|editupload|public)/) {              $desturl = &Apache::lonnet::clutter($desturl);
                 $desturl = &Apache::lonnet::clutter($desturl);              $desturl = &HTML::Entities::encode($desturl,'"<>&');
             }              $destsymb = &HTML::Entities::encode($destsymb,'"<>&');
             $desturl = &HTML::Entities::encode($desturl,'"<>&');              $destination .= 'destinationurl='.$desturl.
             $destsymb = &HTML::Entities::encode($destsymb,'"<>&');                              '&destsymb='.$destsymb;
             $destination .= 'destinationurl='.$desturl.          } else {
                             '&destsymb='.$destsymb;              $destsymb = &HTML::Entities::encode($destsymb,'"<>&');
         } else {              $destination .= 'destinationurl='.$destsymb;
             $destsymb = &HTML::Entities::encode($destsymb,'"<>&');          }
             $destination .= 'destinationurl='.$destsymb;      }
         }      if ($destination =~ m{^/adm/roles}) {
     }          $destination  .= ($destination =~ /\?/) ? '&' : '?';
     if ($destination =~ m{^/adm/roles}) {          $destination .= 'source=login';
         $destination  .= ($destination =~ /\?/) ? '&' : '?';      }
         $destination .= 'source=login';  
     }      my $windowinfo = Apache::lonhtmlcommon::scripttag('self.name="loncapaclient";');
       my $header = '<meta HTTP-EQUIV="Refresh" CONTENT="0; url='.$destination.'" />';
     my $windowinfo=&Apache::lonmenu::open($env{'browser.os'});      my $brcrum = [{'href' => '',
     my $startupremote=&Apache::lonmenu::startupremote($destination);                     'text' => 'Successful Login'},];
     my $remoteinfo=&Apache::lonmenu::load_remote_msg($lowerurl);      my $start_page=&Apache::loncommon::start_page('Successful Login',
     my $setflags=&Apache::lonmenu::setflags();                                                    $header,
     my $maincall=&Apache::lonmenu::maincall();                                                    {'bread_crumbs' => $brcrum,});
     my $brcrum = [{'href' => '',      my $end_page  =&Apache::loncommon::end_page();
                    'text' => 'Successful Login'},];  
     my $start_page=&Apache::loncommon::start_page('Successful Login',   my $continuelink='<a href="'.$destination.'">'.&mt('Continue').'</a>';
                                                   $startupremote,  # ------------------------------------------------- Output for successful login
                                                   {'no_inline_link' => 1,  
                                                    'bread_crumbs' => $brcrum,});      &Apache::loncommon::content_type($r,'text/html');
     my $end_page  =&Apache::loncommon::end_page();      $r->header_out('Set-cookie' => $cookie);
       $r->send_http_header;
     my $continuelink;  
     if ($env{'environment.remote'} eq 'off') {      my %lt=&Apache::lonlocal::texthash(
  $continuelink='<a href="'.$destination.'">'.&mt('Continue').'</a>';         'wel' => 'Welcome',
     }         'pro' => 'Login problems?',
 # ------------------------------------------------- Output for successful login         );
       my $loginhelp = &loginhelpdisplay($domain);
     &Apache::loncommon::content_type($r,'text/html');      if ($loginhelp) {
     $r->header_out('Set-cookie' => $cookie);          $loginhelp = '<p><a href="'.$loginhelp.'">'.$lt{'pro'}.'</a></p>';
     $r->send_http_header;      }
   
     my %lt=&Apache::lonlocal::texthash(      my $welcome = &mt('Welcome to the Learning[_1]Online[_2] Network with CAPA. Please wait while your session is being set up.','<i>','</i>');
        'wel' => 'Welcome',      $r->print(<<ENDSUCCESS);
        'pro' => 'Login problems?',  $start_page
        );  $windowinfo
     my $loginhelp = &loginhelpdisplay($domain);  <h1>$lt{'wel'}</h1>
     if ($loginhelp) {  $welcome
         $loginhelp = '<p><a href="'.$loginhelp.'">'.$lt{'pro'}.'</a></p>';  $loginhelp
     }  $continuelink
   $end_page
     my $welcome = &mt('Welcome to the Learning[_1]Online[_2] Network with CAPA. Please wait while your session is being set up.','<i>','</i>');   ENDSUCCESS
     $r->print(<<ENDSUCCESS);      return;
 $start_page  }
 $setflags  
 $windowinfo  # --------------------------------------------------------------- Failed login!
 <h1>$lt{'wel'}</h1>  
 $welcome  sub failed {
 $loginhelp      my ($r,$message,$form) = @_;
 $remoteinfo      (undef,undef,undef,my $clientmathml,my $clientunicode) =
 $maincall          &Apache::loncommon::decode_user_agent();
 $continuelink      my $args = {};
 $end_page      if ($clientunicode && !$clientmathml) {
 ENDSUCCESS          $args = {'browser.unicode' => 1};
     return;      }
 }  
       my $start_page = &Apache::loncommon::start_page('Unsuccessful Login',undef,$args);
 # --------------------------------------------------------------- Failed login!      my $uname = &Apache::loncommon::cleanup_html($form->{'uname'});
       my $udom = &Apache::loncommon::cleanup_html($form->{'udom'});
 sub failed {      if (&Apache::lonnet::domain($udom,'description') eq '') {
     my ($r,$message,$form) = @_;          undef($udom);
     (undef,undef,undef,my $clientmathml,my $clientunicode) =      }
         &Apache::loncommon::decode_user_agent();      my $retry = '/adm/login';
     my $args = {};      if ($uname eq $form->{'uname'}) {
     if ($clientunicode && !$clientmathml) {          $retry .= '?username='.$uname;
         $args = {'browser.unicode' => 1};      }
     }      if ($udom) {
           $retry .= (($retry=~/\?/)?'&amp;':'?').'domain='.$udom;
     my $start_page = &Apache::loncommon::start_page('Unsuccessful Login',undef,$args);      }
     my $uname = &Apache::loncommon::cleanup_html($form->{'uname'});      if (exists($form->{role})) {
     my $udom = &Apache::loncommon::cleanup_html($form->{'udom'});          my $role = &Apache::loncommon::cleanup_html($form->{role});
     if (&Apache::lonnet::domain($udom,'description') eq '') {          if ($role ne '') {
         undef($udom);              $retry .= (($retry=~/\?/)?'&amp;':'?').'role='.$role;
     }          }
     my $retry = '/adm/login';      }
     if ($uname eq $form->{'uname'}) {      if (exists($form->{symb})) {
         $retry .= '?username='.$uname;          my $symb = &Apache::loncommon::cleanup_html($form->{symb});
     }          if ($symb ne '') {
     if ($udom) {              $retry .= (($retry=~/\?/)?'&amp;':'?').'symb='.$symb;
         $retry .= (($retry=~/\?/)?'&amp;':'?').'domain='.$udom;          }
     }      }
     if (exists($form->{role})) {      my $end_page = &Apache::loncommon::end_page();
         my $role = &Apache::loncommon::cleanup_html($form->{role});      &Apache::loncommon::content_type($r,'text/html');
         if ($role ne '') {      $r->send_http_header;
             $retry .= (($retry=~/\?/)?'&amp;':'?').'role='.$role;      my @actions =
         }           (&mt('Please [_1]log in again[_2].','<a href="'.$retry.'">','</a>'));
     }      my $loginhelp = &loginhelpdisplay($udom);
     if (exists($form->{symb})) {      if ($loginhelp) {
         my $symb = &Apache::loncommon::cleanup_html($form->{symb});          push(@actions, '<a href="'.$loginhelp.'">'.&mt('Login problems?').'</a>');
         if ($symb ne '') {      }
             $retry .= (($retry=~/\?/)?'&amp;':'?').'symb='.$symb;      #FIXME: link to helpdesk might be added here
         }  
     }      $r->print(
     my $end_page = &Apache::loncommon::end_page();         $start_page
     &Apache::loncommon::content_type($r,'text/html');        .'<h2>'.&mt('Sorry ...').'</h2>'
     $r->send_http_header;        .&Apache::lonhtmlcommon::confirm_success(&mt($message),1).'<br /><br />'
     my @actions =        .&Apache::lonhtmlcommon::actionbox(\@actions)
          (&mt('Please [_1]log in again[_2].','<a href="'.$retry.'">','</a>'));        .$end_page
     my $loginhelp = &loginhelpdisplay($udom);      );
     if ($loginhelp) {   }
         push(@actions, '<a href="'.$loginhelp.'">'.&mt('Login problems?').'</a>');  
     }  # ------------------------------------------------------------------ Rerouting!
     #FIXME: link to helpdesk might be added here  
   sub reroute {
     $r->print(      my ($r) = @_;
        $start_page      &Apache::loncommon::content_type($r,'text/html');
       .'<h2>'.&mt('Sorry ...').'</h2>'      $r->send_http_header;
       .&Apache::lonhtmlcommon::confirm_success(&mt($message),1).'<br /><br />'      my $msg='<b>'.&mt('Sorry ...').'</b><br />'
       .&Apache::lonhtmlcommon::actionbox(\@actions)             .&mt('Please [_1]log in again[_2].');
       .$end_page      &Apache::loncommon::simple_error_page($r,'Rerouting',$msg,{'no_auto_mt_msg' => 1});
     );  }
  }  
   # ---------------------------------------------------------------- Main handler
 # ------------------------------------------------------------------ Rerouting!  
   sub handler {
 sub reroute {      my $r = shift;
     my ($r) = @_;      my $londocroot = $r->dir_config('lonDocRoot');
     &Apache::loncommon::content_type($r,'text/html');      my $form;
     $r->send_http_header;  # Are we re-routing?
     my $msg='<b>'.&mt('Sorry ...').'</b><br />'      if (-e "$londocroot/lon-status/reroute.txt") {
            .&mt('Please [_1]log in again[_2].');   &reroute($r);
     &Apache::loncommon::simple_error_page($r,'Rerouting',$msg,{'no_auto_mt_msg' => 1});   return OK;
 }      }
   
 # ---------------------------------------------------------------- Main handler      &Apache::lonlocal::get_language_handle($r);
   
 sub handler {  # -------------------------------- Prevent users from attempting to login twice
     my $r = shift;      my $handle = &Apache::lonnet::check_for_valid_session($r);
     my $londocroot = $r->dir_config('lonDocRoot');      if ($handle ne '') {
     my $form;          my $lonidsdir=$r->dir_config('lonIDsDir');
 # Are we re-routing?          if ($handle=~/^publicuser\_/) {
     if (-e "$londocroot/lon-status/reroute.txt") {  # For "public user" - remove it, we apparently really want to login
  &reroute($r);              unlink($r->dir_config('lonIDsDir')."/$handle.id");
  return OK;          } else {
     }  # Indeed, a valid token is found
               &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);
     &Apache::lonlocal::get_language_handle($r);      &Apache::loncommon::content_type($r,'text/html');
       $r->send_http_header;
 # -------------------------------- Prevent users from attempting to login twice      my $start_page =
     my $handle = &Apache::lonnet::check_for_valid_session($r);          &Apache::loncommon::start_page('Already logged in');
     if ($handle ne '') {      my $end_page =
         my $lonidsdir=$r->dir_config('lonIDsDir');          &Apache::loncommon::end_page();
         if ($handle=~/^publicuser\_/) {              my $dest = '/adm/roles';
 # For "public user" - remove it, we apparently really want to login              if ($env{'form.firsturl'} ne '') {
             unlink($r->dir_config('lonIDsDir')."/$handle.id");                  $dest = $env{'form.firsturl'};
         } else {              }
 # Indeed, a valid token is found              $r->print(
             &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);                 $start_page
     &Apache::loncommon::content_type($r,'text/html');                .'<p class="LC_warning">'.&mt('You are already logged in!').'</p>'
     $r->send_http_header;                .'<p>'.&mt('Please either [_1]continue the current session[_2] or [_3]log out[_4].'
     my $start_page =                       ,'<a href="'.$dest.'">','</a>','<a href="/adm/logout">','</a>')
         &Apache::loncommon::start_page('Already logged in');                .'</p>'
     my $end_page =                 .$end_page
         &Apache::loncommon::end_page();              );
             my $dest = '/adm/roles';              return OK;
             if ($env{'form.firsturl'} ne '') {          }
                 $dest = $env{'form.firsturl'};      }
             }  
             $r->print(  # ---------------------------------------------------- No valid token, continue
                $start_page  
               .'<p class="LC_warning">'.&mt('You are already logged in!').'</p>'  
               .'<p>'.&mt('Please either [_1]continue the current session[_2] or [_3]log out[_4].'      my $buffer;
                     ,'<a href="'.$dest.'">','</a>','<a href="/adm/logout">','</a>')      if ($r->header_in('Content-length') > 0) {
               .'</p>'   $r->read($buffer,$r->header_in('Content-length'),0);
               .$end_page      }
             );      my %form;
             return OK;      foreach my $pair (split(/&/,$buffer)) {
         }         my ($name,$value) = split(/=/,$pair);
     }         $value =~ tr/+/ /;
          $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
 # ---------------------------------------------------- No valid token, continue         $form{$name}=$value;
       }
   
     my $buffer;      if ((!$form{'uname'}) || (!$form{'upass0'}) || (!$form{'udom'})) {
     if ($r->header_in('Content-length') > 0) {   &failed($r,'Username, password and domain need to be specified.',
  $r->read($buffer,$r->header_in('Content-length'),0);   \%form);
     }          return OK;
     my %form;      }
     foreach my $pair (split(/&/,$buffer)) {  
        my ($name,$value) = split(/=/,$pair);  # split user logging in and "su"-user
        $value =~ tr/+/ /;  
        $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;      ($form{'uname'},$form{'suname'})=split(/\:/,$form{'uname'});
        $form{$name}=$value;      $form{'uname'} = &LONCAPA::clean_username($form{'uname'});
     }      $form{'suname'}= &LONCAPA::clean_username($form{'suname'});
       $form{'udom'}  = &LONCAPA::clean_domain(  $form{'udom'});
     if ((!$form{'uname'}) || (!$form{'upass0'}) || (!$form{'udom'})) {  
  &failed($r,'Username, password and domain need to be specified.',      my $role   = $r->dir_config('lonRole');
  \%form);      my $domain = $r->dir_config('lonDefDomain');
         return OK;      my $prodir = $r->dir_config('lonUsersDir');
     }      my $contact_name = &mt('LON-CAPA helpdesk');
   
 # split user logging in and "su"-user  # ---------------------------------------- Get the information from login token
   
     ($form{'uname'},$form{'suname'})=split(/\:/,$form{'uname'});      my $tmpinfo=Apache::lonnet::reply('tmpget:'.$form{'logtoken'},
     $form{'uname'} = &LONCAPA::clean_username($form{'uname'});                                        $form{'serverid'});
     $form{'suname'}= &LONCAPA::clean_username($form{'suname'});  
     $form{'udom'}  = &LONCAPA::clean_domain(  $form{'udom'});      my %sessiondata;
       if ($form{'iptoken'}) {
     my $role   = $r->dir_config('lonRole');          %sessiondata = &Apache::lonnet::tmpget($form{'iptoken'});
     my $domain = $r->dir_config('lonDefDomain');          my $delete = &Apache::lonnet::tmpdel($form{'iptoken'});
     my $prodir = $r->dir_config('lonUsersDir');      }
     my $contact_name = &mt('LON-CAPA helpdesk');  
       if (($tmpinfo=~/^error/) || ($tmpinfo eq 'con_lost') ||
 # ---------------------------------------- Get the information from login token          ($tmpinfo eq 'no_such_host')) {
    &failed($r,'Information needed to verify your login information is missing, inaccessible or expired.',\%form);
     my $tmpinfo=Apache::lonnet::reply('tmpget:'.$form{'logtoken'},          return OK;
                                       $form{'serverid'});      } else {
    my $reply = &Apache::lonnet::reply('tmpdel:'.$form{'logtoken'},
     my %sessiondata;     $form{'serverid'});
     if ($form{'iptoken'}) {          if ( $reply ne 'ok' ) {
         %sessiondata = &Apache::lonnet::tmpget($form{'iptoken'});              &failed($r,'Session could not be opened.',\%form);
         my $delete = &Apache::lonnet::tmpdel($form{'iptoken'});      &Apache::lonnet::logthis("ERROR got a reply of $reply when trying to contact ". $form{'serverid'}." to get login token");
     }      return OK;
    }
     if (($tmpinfo=~/^error/) || ($tmpinfo eq 'con_lost') ||       }
         ($tmpinfo eq 'no_such_host')) {  
  &failed($r,'Information needed to verify your login information is missing, inaccessible or expired.',\%form);      if (!&Apache::lonnet::domain($form{'udom'})) {
         return OK;          &failed($r,'The domain you provided is not a valid LON-CAPA domain.',\%form);
     } else {          return OK;
  my $reply = &Apache::lonnet::reply('tmpdel:'.$form{'logtoken'},      }
    $form{'serverid'});  
         if ( $reply ne 'ok' ) {      my ($key,$firsturl,$rolestr,$symbstr)=split(/&/,$tmpinfo);
             &failed($r,'Session could not be opened.',\%form);      if ($rolestr) {
     &Apache::lonnet::logthis("ERROR got a reply of $reply when trying to contact ". $form{'serverid'}." to get login token");          $rolestr = &unescape($rolestr);
     return OK;      }
  }      if ($symbstr) {
     }          $symbstr= &unescape($symbstr);
       }
     if (!&Apache::lonnet::domain($form{'udom'})) {      if ($rolestr =~ /^role=/) {
         &failed($r,'The domain you provided is not a valid LON-CAPA domain.',\%form);          (undef,$form{'role'}) = split('=',$rolestr);
         return OK;      }
     }      if ($symbstr =~ /^symb=/) {
           (undef,$form{'symb'}) = split('=',$symbstr);
     my ($key,$firsturl,$rolestr,$symbstr)=split(/&/,$tmpinfo);      }
     if ($rolestr) {  
         $rolestr = &unescape($rolestr);      my $upass = $ENV{HTTPS} ? join("", @form{qw(upass0 upass1 upass2)})
     }          : decrypt($key, @form{qw(upass0 upass1 upass2)});
     if ($symbstr) {  
         $symbstr= &unescape($symbstr);  # ---------------------------------------------------------------- Authenticate
     }  
     if ($rolestr =~ /^role=/) {      my %domconfig = &Apache::lonnet::get_dom('configuration',['usercreation'],$form{'udom'});
         (undef,$form{'role'}) = split('=',$rolestr);      my ($cancreate,$statustocreate) =
     }          &Apache::createaccount::get_creation_controls($form{'udom'},$domconfig{'usercreation'});
     if ($symbstr =~ /^symb=/) {       my $defaultauth;
         (undef,$form{'symb'}) = split('=',$symbstr);      if (ref($cancreate) eq 'ARRAY') {
     }          if (grep(/^login$/,@{$cancreate})) {
               $defaultauth = 1;
     my $keybin=pack("H16",$key);          }
       }
     my $cipher;      my $clientcancheckhost = 1;
     if ($Crypt::DES::VERSION>=2.03) {      my $authhost=Apache::lonnet::authenticate($form{'uname'},$upass,
  $cipher=new Crypt::DES $keybin;                                                $form{'udom'},$defaultauth,
     }                                                $clientcancheckhost);
     else {     
  $cipher=new DES $keybin;  # --------------------------------------------------------------------- Failed?
     }  
     my $upass='';      if ($authhost eq 'no_host') {
     for (my $i=0;$i<=2;$i++) {   &failed($r,'Username and/or password could not be authenticated.',
  my $chunk=   \%form);
     $cipher->decrypt(unpack("a8",pack("H16",substr($form{'upass'.$i},0,16))));          return OK;
       } elsif ($authhost eq 'no_account_on_host') {
  $chunk.=          if ($defaultauth) {
     $cipher->decrypt(unpack("a8",pack("H16",substr($form{'upass'.$i},16,16))));              my $domdesc = &Apache::lonnet::domain($form{'udom'},'description');
               unless (&check_can_host($r,\%form,'no_account_on_host',$domdesc)) {
  $chunk=substr($chunk,1,ord(substr($chunk,0,1)));                  return OK;
  $upass.=$chunk;              }
     }              my $start_page =
                   &Apache::loncommon::start_page('Create a user account in LON-CAPA');
 # ---------------------------------------------------------------- Authenticate              my $lonhost = $r->dir_config('lonHostID');
               my $origmail = $Apache::lonnet::perlvar{'lonSupportEMail'};
     my %domconfig = &Apache::lonnet::get_dom('configuration',['usercreation'],$form{'udom'});              my $contacts =
     my ($cancreate,$statustocreate) =                  &Apache::loncommon::build_recipient_list(undef,'helpdeskmail',
         &Apache::createaccount::get_creation_controls($form{'udom'},$domconfig{'usercreation'});                                                          $form{'udom'},$origmail);
     my $defaultauth;              my ($contact_email) = split(',',$contacts);
     if (ref($cancreate) eq 'ARRAY') {              my $output =
         if (grep(/^login$/,@{$cancreate})) {                  &Apache::createaccount::username_check($form{'uname'},$form{'udom'},
             $defaultauth = 1;                                                         $domdesc,'',$lonhost,
         }                                                         $contact_email,$contact_name,
     }                                                         undef,$statustocreate);
     my $clientcancheckhost = 1;              &Apache::loncommon::content_type($r,'text/html');
     my $authhost=Apache::lonnet::authenticate($form{'uname'},$upass,              $r->send_http_header;
                                               $form{'udom'},$defaultauth,              &Apache::createaccount::print_header($r,$start_page);
                                               $clientcancheckhost);              $r->print('<h3>'.&mt('Account creation').'</h3>'.
                             &mt('Although your username and password were authenticated, you do not currently have a LON-CAPA account at this institution.').'<br />'.
 # --------------------------------------------------------------------- Failed?                        $output.&Apache::loncommon::end_page());
               return OK;
     if ($authhost eq 'no_host') {          } else {
  &failed($r,'Username and/or password could not be authenticated.',              &failed($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);
  \%form);              return OK;
         return OK;          }
     } elsif ($authhost eq 'no_account_on_host') {      }
         if ($defaultauth) {  
             my $domdesc = &Apache::lonnet::domain($form{'udom'},'description');      if (($firsturl eq '') ||
             unless (&check_can_host($r,\%form,'no_account_on_host',$domdesc)) {   ($firsturl=~/^\/adm\/(logout|remote)/)) {
                 return OK;   $firsturl='/adm/roles';
             }      }
             my $start_page =   
                 &Apache::loncommon::start_page('Create a user account in LON-CAPA',      my $hosthere;
                                                '',{'no_inline_link'   => 1,});      if ($form{'iptoken'}) {
             my $lonhost = $r->dir_config('lonHostID');          if (($sessiondata{'domain'} eq $form{'udom'}) &&
             my $origmail = $Apache::lonnet::perlvar{'lonSupportEMail'};              ($sessiondata{'username'} eq $form{'uname'})) {
             my $contacts =               $hosthere = 1;
                 &Apache::loncommon::build_recipient_list(undef,'helpdeskmail',          }
                                                         $form{'udom'},$origmail);      }
             my ($contact_email) = split(',',$contacts);   
             my $output =   # --------------------------------- Are we attempting to login as somebody else?
                 &Apache::createaccount::username_check($form{'uname'},$form{'udom'},      if ($form{'suname'}) {
                                                        $domdesc,'',$lonhost,  # ------------ see if the original user has enough privileges to pull this stunt
                                                        $contact_email,$contact_name,   if (&Apache::lonnet::privileged($form{'uname'},$form{'udom'})) {
                                                        undef,$statustocreate);  # ---------------------------------------------------- see if the su-user exists
             &Apache::loncommon::content_type($r,'text/html');      unless (&Apache::lonnet::homeserver($form{'suname'},$form{'udom'})
             $r->send_http_header;   eq 'no_host') {
             &Apache::createaccount::print_header($r,$start_page);   &Apache::lonnet::logthis(&Apache::lonnet::homeserver($form{'suname'},$form{'udom'}));
             $r->print('<h3>'.&mt('Account creation').'</h3>'.  # ------------------------------ see if the su-user is not too highly privileged
                       &mt('Although your username and password were authenticated, you do not currently have a LON-CAPA account at this institution.').'<br />'.   unless (&Apache::lonnet::privileged($form{'suname'},$form{'udom'})) {
                       $output.&Apache::loncommon::end_page());  # -------------------------------------------------------- actually switch users
             return OK;      &Apache::lonnet::logperm('User '.$form{'uname'}.' at '.$form{'udom'}.
         } else {   ' logging in as '.$form{'suname'});
             &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);      $form{'uname'}=$form{'suname'};
             return OK;   } else {
         }      &Apache::lonnet::logthis('Attempted switch user to privileged user');
     }   }
       }
     if (($firsturl eq '') ||    } else {
  ($firsturl=~/^\/adm\/(logout|remote)/)) {      &Apache::lonnet::logthis('Non-privileged user attempting switch user');
  $firsturl='/adm/roles';   }
     }      }
   
     my $hosthere;      my ($is_balancer,$otherserver);
     if ($form{'iptoken'}) {  
         if (($sessiondata{'domain'} eq $form{'udom'}) &&      unless ($hosthere) {
             ($sessiondata{'username'} eq $form{'uname'})) {          ($is_balancer,$otherserver) =
             $hosthere = 1;              &Apache::lonnet::check_loadbalancing($form{'uname'},$form{'udom'});
         }      }
     }  
       if ($is_balancer) {
 # --------------------------------- Are we attempting to login as somebody else?          if (!$otherserver) {
     if ($form{'suname'}) {              ($otherserver) = &Apache::lonnet::choose_server($form{'udom'});
 # ------------ see if the original user has enough privileges to pull this stunt          }
  if (&Apache::lonnet::privileged($form{'uname'},$form{'udom'})) {          if ($otherserver) {
 # ---------------------------------------------------- see if the su-user exists              &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef,
     unless (&Apache::lonnet::homeserver($form{'suname'},$form{'udom'})                       \%form);
  eq 'no_host') {              my $switchto = '/adm/switchserver?otherserver='.$otherserver;
  &Apache::lonnet::logthis(&Apache::lonnet::homeserver($form{'suname'},$form{'udom'}));              if (($firsturl) && ($firsturl ne '/adm/switchserver') && ($firsturl ne '/adm/roles')) {
 # ------------------------------ see if the su-user is not too highly privileged                  $switchto .= '&origurl='.$firsturl;
  unless (&Apache::lonnet::privileged($form{'suname'},$form{'udom'})) {              }
 # -------------------------------------------------------- actually switch users              if ($form{'role'}) {
     &Apache::lonnet::logperm('User '.$form{'uname'}.' at '.$form{'udom'}.                  $switchto .= '&role='.$form{'role'};
  ' logging in as '.$form{'suname'});              }
     $form{'uname'}=$form{'suname'};              if ($form{'symb'}) {
  } else {                  $switchto .= '&symb='.$form{'symb'};
     &Apache::lonnet::logthis('Attempted switch user to privileged user');              }
  }              $r->internal_redirect($switchto);
     }          } else {
  } else {              $r->print(&noswitch());
     &Apache::lonnet::logthis('Non-privileged user attempting switch user');          }
  }          return OK;
     }      } else {
           if (!&check_can_host($r,\%form,$authhost)) {
     my ($is_balancer,$otherserver);              my ($otherserver) = &Apache::lonnet::choose_server($form{'udom'});
               if ($otherserver) {
     unless ($hosthere) {                  &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef,
         ($is_balancer,$otherserver) =                           \%form);
             &Apache::lonnet::check_loadbalancing($form{'uname'},$form{'udom'});                  my $switchto = '/adm/switchserver?otherserver='.$otherserver;
     }                  if (($firsturl) && ($firsturl ne '/adm/switchserver') && ($firsturl ne '/adm/roles')) {
                       $switchto .= '&origurl='.$firsturl;
     if ($is_balancer) {                  }
         if (!$otherserver) {                   if ($form{'role'}) {
             ($otherserver) = &Apache::lonnet::choose_server($form{'udom'});                      $switchto .= '&role='.$form{'role'};
         }                  }
         if ($otherserver) {                  if ($form{'symb'}) {
             &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef,                      $switchto .= '&symb='.$form{'symb'};
                      \%form);                  }
             my $switchto = '/adm/switchserver?otherserver='.$otherserver;                  $r->internal_redirect($switchto);
             if (($firsturl) && ($firsturl ne '/adm/switchserver') && ($firsturl ne '/adm/roles')) {              } else {
                 $switchto .= '&origurl='.$firsturl;                  $r->print(&noswitch());
             }              }
             if ($form{'role'}) {              return OK;
                 $switchto .= '&role='.$form{'role'};          }
             }  
             if ($form{'symb'}) {  # ------------------------------------------------------- Do the load balancing
                 $switchto .= '&symb='.$form{'symb'};  
             }  # ---------------------------------------------------------- Determine own load
             $r->internal_redirect($switchto);          my $loadlim = $r->dir_config('lonLoadLim');
         } else {          my $loadavg;
             $r->print(&noswitch());          {
         }              my $loadfile=Apache::File->new('/proc/loadavg');
         return OK;              $loadavg=<$loadfile>;
     } else {          }
         if (!&check_can_host($r,\%form,$authhost)) {          $loadavg =~ s/\s.*//g;
             my ($otherserver) = &Apache::lonnet::choose_server($form{'udom'});          my $loadpercent=sprintf("%.1f",100*$loadavg/$loadlim);
             if ($otherserver) {          my $userloadpercent=&Apache::lonnet::userload();
                 &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef,  
                          \%form);  # ---------------------------------------------------------- Are we overloaded?
                 my $switchto = '/adm/switchserver?otherserver='.$otherserver;          if ((($userloadpercent>100.0)||($loadpercent>100.0))) {
                 if (($firsturl) && ($firsturl ne '/adm/switchserver') && ($firsturl ne '/adm/roles')) {              my $unloaded=Apache::lonnet::spareserver($loadpercent,$userloadpercent,1,$form{'udom'});
                     $switchto .= '&origurl='.$firsturl;              if (!$unloaded) {
                 }                  ($unloaded) = &Apache::lonnet::choose_server($form{'udom'});
                 if ($form{'role'}) {              }
                     $switchto .= '&role='.$form{'role'};              if ($unloaded) {
                 }                  &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',
                 if ($form{'symb'}) {                           undef,\%form);
                     $switchto .= '&symb='.$form{'symb'};                  $r->internal_redirect('/adm/switchserver?otherserver='.$unloaded.'&origurl='.$firsturl);
                 }                  return OK;
                 $r->internal_redirect($switchto);              }
             } else {          }
                 $r->print(&noswitch());          &success($r,$form{'uname'},$form{'udom'},$authhost,$firsturl,undef,
             }                   \%form);
             return OK;          return OK;
         }      }
   }
 # ------------------------------------------------------- Do the load balancing  
   sub decrypt {
 # ---------------------------------------------------------- Determine own load      my ($key, @chunks) = @_;
         my $loadlim = $r->dir_config('lonLoadLim');  
         my $loadavg;      my $keybin = pack("H16",$key);
         {  
             my $loadfile=Apache::File->new('/proc/loadavg');      my $cipher;
             $loadavg=<$loadfile>;      if ($Crypt::DES::VERSION >= 2.03) {
         }          $cipher = new Crypt::DES $keybin;
         $loadavg =~ s/\s.*//g;      } else {
         my $loadpercent=sprintf("%.1f",100*$loadavg/$loadlim);          $cipher = new DES $keybin;
         my $userloadpercent=&Apache::lonnet::userload();      }
   
 # ---------------------------------------------------------- Are we overloaded?      my $upass='';
         if ((($userloadpercent>100.0)||($loadpercent>100.0))) {      for (my $i=0;$i<=2;$i++) {
             my $unloaded=Apache::lonnet::spareserver($loadpercent,$userloadpercent,1,$form{'udom'});          my $chunk =
             if (!$unloaded) {              $cipher->decrypt(
                 ($unloaded) = &Apache::lonnet::choose_server($form{'udom'});                  unpack("a8",pack("H16",substr($chunks[$i],0,16))));
             }  
             if ($unloaded) {          $chunk .=
                 &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',              $cipher->decrypt(
                          undef,\%form);                  unpack("a8",pack("H16",substr($chunks[$i],16,16))));
                 $r->internal_redirect('/adm/switchserver?otherserver='.$unloaded.'&origurl='.$firsturl);  
                 return OK;          $chunk = substr($chunk,1,ord(substr($chunk,0,1)));
             }          $upass .= $chunk;
         }      }
         &success($r,$form{'uname'},$form{'udom'},$authhost,$firsturl,undef,      return $upass;
                  \%form);  }
         return OK;  
     }  sub check_can_host {
 }      my ($r,$form,$authhost,$domdesc) = @_;
       return unless (ref($form) eq 'HASH');
 sub check_can_host {      my $canhost = 1;
     my ($r,$form,$authhost,$domdesc) = @_;      my $lonhost = $r->dir_config('lonHostID');
     return unless (ref($form) eq 'HASH');      my $udom = $form->{'udom'};
     my $canhost = 1;      my @intdoms;
     my $lonhost = $r->dir_config('lonHostID');      my $internet_names = &Apache::lonnet::get_internet_names($lonhost);
     my $udom = $form->{'udom'};      if (ref($internet_names) eq 'ARRAY') {
     my @intdoms;          @intdoms = @{$internet_names};
     my $internet_names = &Apache::lonnet::get_internet_names($lonhost);      }
     if (ref($internet_names) eq 'ARRAY') {      my $uprimary_id = &Apache::lonnet::domain($udom,'primary');
         @intdoms = @{$internet_names};      my $uint_dom = &Apache::lonnet::internet_dom($uprimary_id);
     }      unless ($uint_dom ne '' && grep(/^\Q$uint_dom\E$/,@intdoms)) {
     my $uprimary_id = &Apache::lonnet::domain($udom,'primary');          my $machine_dom = &Apache::lonnet::host_domain($lonhost);
     my $uint_dom = &Apache::lonnet::internet_dom($uprimary_id);          my $hostname = &Apache::lonnet::hostname($lonhost);
     unless ($uint_dom ne '' && grep(/^\Q$uint_dom\E$/,@intdoms)) {          my $serverhomeID = &Apache::lonnet::get_server_homeID($hostname);
         my $machine_dom = &Apache::lonnet::host_domain($lonhost);          my $serverhomedom = &Apache::lonnet::host_domain($serverhomeID);
         my $hostname = &Apache::lonnet::hostname($lonhost);          my %defdomdefaults = &Apache::lonnet::get_domain_defaults($serverhomedom);
         my $serverhomeID = &Apache::lonnet::get_server_homeID($hostname);          my %udomdefaults = &Apache::lonnet::get_domain_defaults($udom);
         my $serverhomedom = &Apache::lonnet::host_domain($serverhomeID);          my $loncaparev;
         my %defdomdefaults = &Apache::lonnet::get_domain_defaults($serverhomedom);          if ($authhost eq 'no_account_on_host') {
         my %udomdefaults = &Apache::lonnet::get_domain_defaults($udom);              $loncaparev = &Apache::lonnet::get_server_loncaparev($machine_dom);
         my $loncaparev;          } else {
         if ($authhost eq 'no_account_on_host') {              $loncaparev = &Apache::lonnet::get_server_loncaparev($machine_dom,$lonhost);
             $loncaparev = &Apache::lonnet::get_server_loncaparev($machine_dom);          }
         } else {          $canhost = &Apache::lonnet::can_host_session($udom,$lonhost,$loncaparev,
             $loncaparev = &Apache::lonnet::get_server_loncaparev($machine_dom,$lonhost);                                                       $udomdefaults{'remotesessions'},
         }                                                       $defdomdefaults{'hostedsessions'});
         $canhost = &Apache::lonnet::can_host_session($udom,$lonhost,$loncaparev,      }
                                                      $udomdefaults{'remotesessions'},      unless ($canhost) {
                                                      $defdomdefaults{'hostedsessions'});          if ($authhost eq 'no_account_on_host') {
     }              my $checkloginvia = 1;
     unless ($canhost) {              my ($login_host,$hostname) =
         if ($authhost eq 'no_account_on_host') {                  &Apache::lonnet::choose_server($udom,$checkloginvia);
             my $checkloginvia = 1;              &Apache::loncommon::content_type($r,'text/html');
             my ($login_host,$hostname) =               $r->send_http_header;
                 &Apache::lonnet::choose_server($udom,$checkloginvia);              if ($login_host ne '') {
             &Apache::loncommon::content_type($r,'text/html');                  my $protocol = $Apache::lonnet::protocol{$login_host};
             $r->send_http_header;                  $protocol = 'http' if ($protocol ne 'https');
             if ($login_host ne '') {                  my $newurl = $protocol.'://'.$hostname.'/adm/createaccount';
                 my $protocol = $Apache::lonnet::protocol{$login_host};                  $r->print(&Apache::loncommon::start_page('Create a user account in LON-CAPA').
                 $protocol = 'http' if ($protocol ne 'https');                            '<h3>'.&mt('Account creation').'</h3>'.
                 my $newurl = $protocol.'://'.$hostname.'/adm/createaccount';                            &mt('You do not currently have a LON-CAPA account at this institution.').'<br />'.
                 $r->print(&Apache::loncommon::start_page('Create a user account in LON-CAPA').                            '<p>'.&mt('You will be able to create one by logging into a LON-CAPA server within the [_1] domain.',$domdesc).'</p>'.
                           '<h3>'.&mt('Account creation').'</h3>'.                            '<p>'.&mt('[_1]Log in[_2]','<a href="'.$newurl.'">','</a>').
                           &mt('You do not currently have a LON-CAPA account at this institution.').'<br />'.                            &Apache::loncommon::end_page());
                           '<p>'.&mt('You will be able to create one by logging into a LON-CAPA server within the [_1] domain.',$domdesc).'</p>'.              } else {
                           '<p>'.&mt('[_1]Log in[_2]','<a href="'.$newurl.'">','</a>').                  $r->print(&Apache::loncommon::start_page('Access to LON-CAPA unavailable').
                           &Apache::loncommon::end_page());                            '<h3>'.&mt('Account creation unavailable').'</h3>'.
             } else {                            &mt('You do not currently have a LON-CAPA account at this institution.').'<br />'.
                 $r->print(&Apache::loncommon::start_page('Access to LON-CAPA unavailable').                            '<p>'.&mt('Currently a LON-CAPA server is not available within the [_1] domain for you to log-in to, to create an account.',$domdesc).'</p>'.
                           '<h3>'.&mt('Account creation unavailable').'</h3>'.                            &Apache::loncommon::end_page());
                           &mt('You do not currently have a LON-CAPA account at this institution.').'<br />'.              }
                           '<p>'.&mt('Currently a LON-CAPA server is not available within the [_1] domain for you to log-in to, to create an account.',$domdesc).'</p>'.          } else {
                           &Apache::loncommon::end_page());              &success($r,$form->{'uname'},$udom,$authhost,'noredirect',undef,
             }                       $form);
         } else {              my ($otherserver) = &Apache::lonnet::choose_server($udom);
             &success($r,$form->{'uname'},$udom,$authhost,'noredirect',undef,              $r->internal_redirect('/adm/switchserver?otherserver='.$otherserver);
                      $form);          }
             my ($otherserver) = &Apache::lonnet::choose_server($udom);      }
             $r->internal_redirect('/adm/switchserver?otherserver='.$otherserver);      return $canhost;
         }  }
     }  
     return $canhost;  sub noswitch {
 }      my $result = &Apache::loncommon::start_page('Access to LON-CAPA unavailable').
                    '<h3>'.&mt('Session unavailable').'</h3>'.
 sub noswitch {                   &mt('This LON-CAPA server is unable to host your session.').'<br />'.
     my $result = &Apache::loncommon::start_page('Access to LON-CAPA unavailable').                   '<p>'.&mt('Currently no other LON-CAPA server is available to host your session either.').'</p>'.
                  '<h3>'.&mt('Session unavailable').'</h3>'.                   &Apache::loncommon::end_page();
                  &mt('This LON-CAPA server is unable to host your session.').'<br />'.      return $result;
                  '<p>'.&mt('Currently no other LON-CAPA server is available to host your session either.').'</p>'.  }
                  &Apache::loncommon::end_page();  
     return $result;  sub loginhelpdisplay {
 }      my ($authdomain) = @_;
       my $login_help = 1;
 sub loginhelpdisplay {      my $lang = &Apache::lonlocal::current_language();
     my ($authdomain) = @_;      if ($login_help) {
     my $login_help = 1;          my $dom = $authdomain;
     my $lang = &Apache::lonlocal::current_language();          if ($dom eq '') {
     if ($login_help) {              $dom = &Apache::lonnet::default_login_domain();
         my $dom = $authdomain;          }
         if ($dom eq '') {          my %domconfhash = &Apache::loncommon::get_domainconf($dom);
             $dom = &Apache::lonnet::default_login_domain();          my $loginhelp_url;
         }          if ($lang) {
         my %domconfhash = &Apache::loncommon::get_domainconf($dom);              $loginhelp_url = $domconfhash{$dom.'.login.helpurl_'.$lang};
         my $loginhelp_url;              if ($loginhelp_url ne '') {
         if ($lang) {                  return $loginhelp_url;
             $loginhelp_url = $domconfhash{$dom.'.login.helpurl_'.$lang};              }
             if ($loginhelp_url ne '') {          }
                 return $loginhelp_url;          $loginhelp_url = $domconfhash{$dom.'.login.helpurl_nolang'};
             }          if ($loginhelp_url ne '') {
         }              return $loginhelp_url;
         $loginhelp_url = $domconfhash{$dom.'.login.helpurl_nolang'};          } else {
         if ($loginhelp_url ne '') {              return '/adm/loginproblems.html';
             return $loginhelp_url;          }
         } else {      }
             return '/adm/loginproblems.html';      return;
         }  }
     }  
     return;  1;
 }  __END__
   
 1;  
 __END__  
   
   
Removed from v.1.121.2.11  
changed lines
  Added in v.1.137

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