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Diff for /loncom/auth/lonauth.pm between versions 1.75 and 1.136

version 1.75, 2006/04/20 04:30:02 version 1.136, 2014/12/05 12:03:20
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 Apache::Constants qw(:common);  use LONCAPA;
 use Apache::File;  use Apache::Constants qw(:common);
 use CGI qw(:standard);  use CGI qw(:standard);
 use CGI::Cookie();  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 Fcntl qw(:flock);  use Fcntl qw(:flock);
 use Apache::lonlocal;  use Apache::lonlocal;
   use Apache::File();
 my %FORM;  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) = @_;   $form) = @_;
     my $lonids=$r->dir_config('lonIDsDir');  
   # ------------------------------------------------------------ Get cookie ready
     my $public=($username eq 'public' && $domain eq 'public');      my $cookie =
    &Apache::loncommon::init_user_environment($r, $username, $domain,
 # See if old ID present, if so, remove    $authhost, $form,
     {'extra_env' => $extra_env,});
     my ($filename,$cookie,$userroles);  
     my $now=time;      my $public=($username eq 'public' && $domain eq 'public');
   
     if ($public) {      if ($public or $lowerurl eq 'noredirect') { return $cookie; }
  my $max_public=100;  
  my $oldest;  # -------------------------------------------------------------------- Log this
  my $oldest_time=0;  
  for(my $next=1;$next<=$max_public;$next++) {      &Apache::lonnet::log($domain,$username,$authhost,
     if (-e $lonids."/publicuser_$next.id") {                           "Login $ENV{'REMOTE_ADDR'}");
  my $mtime=(stat($lonids."/publicuser_$next.id"))[9];  
  if ($mtime<$oldest_time || !$oldest_time) {  # ------------------------------------------------- Check for critical messages
     $oldest_time=$mtime;  
     $oldest=$next;      my @what=&Apache::lonnet::dump('critical',$domain,$username);
  }      if ($what[0]) {
     } else {   if (($what[0] ne 'con_lost') && ($what[0]!~/^error\:/)) {
  $cookie="publicuser_$next";      $lowerurl='/adm/email?critical=display';
  last;          }
     }      }
  }  
  if (!$cookie) { $cookie="publicuser_$oldest"; }  # ------------------------------------------------------------ Get cookie ready
     } else {      $cookie="lonID=$cookie; path=/";
  opendir(DIR,$lonids);  # -------------------------------------------------------- Menu script and info
  while ($filename=readdir(DIR)) {      my $destination = $lowerurl;
     if ($filename=~/^$username\_\d+\_$domain\_$authhost\.id$/) {  
  unlink($lonids.'/'.$filename);      if (defined($form->{role})) {
     }          my $envkey = 'user.role.'.$form->{role};
  }          my $now=time;
  closedir(DIR);          my $then=$env{'user.login.time'};
           my $refresh=$env{'user.refresh.time'};
 # Give them a new cookie          my $update=$env{'user.update.time'};
           if (!$update) {
  $cookie="$username\_$now\_$domain\_$authhost";              $update = $then;
               }
 # Initialize roles          if (exists($env{$envkey})) {
               my ($role,$where,$trolecode,$tstart,$tend,$tremark,$tstatus);
  $userroles=Apache::lonnet::rolesinit($domain,$username,$authhost);              &Apache::lonnet::role_status($envkey,$update,$refresh,$now,\$role,\$where,
     }                                           \$trolecode,\$tstatus,\$tstart,\$tend);
 # ------------------------------------ Check browser type and MathML capability              if ($tstatus eq 'is') {
                   $destination  .= ($destination =~ /\?/) ? '&' : '?';
     my ($httpbrowser,$clientbrowser,$clientversion,$clientmathml,                  my $newrole = &HTML::Entities::encode($form->{role},'"<>&');
         $clientunicode,$clientos) = &Apache::loncommon::decode_user_agent($r);                  $destination .= 'selectrole=1&'.$newrole.'=1';
               }
 # -------------------------------------- Any accessibility options to remember?          }
     if (($FORM{'interface'}) && ($FORM{'remember'} eq 'true')) {      }
  foreach ('imagesuppress','appletsuppress',      if (defined($form->{symb})) {
  'embedsuppress','fontenhance','blackwhite') {          my $destsymb = $form->{symb};
     if ($FORM{$_} eq 'true') {          $destination  .= ($destination =~ /\?/) ? '&' : '?';
  &Apache::lonnet::put('environment',{$_ => 'on'},          if ($destsymb =~ /___/) {
      $domain,$username);              # FIXME Need to deal with encrypted symbs and urls as needed.
     } else {              my ($map,$resid,$desturl)=split(/___/,$destsymb);
  &Apache::lonnet::del('environment',[$_],$domain,$username);              unless ($desturl=~/^(adm|editupload|public)/) {
     }                  $desturl = &Apache::lonnet::clutter($desturl);
  }              }
     }              $desturl = &HTML::Entities::encode($desturl,'"<>&');
 # ------------------------------------------------------------- Get environment              $destsymb = &HTML::Entities::encode($destsymb,'"<>&');
               $destination .= 'destinationurl='.$desturl.
     my $userenv;                              '&destsymb='.$destsymb;
     my %userenv=Apache::lonnet::dump('environment',$domain,$username);          } else {
     my ($tmp) = keys(%userenv);              $destsymb = &HTML::Entities::encode($destsymb,'"<>&');
     if ($tmp !~ /^(con_lost|error|no_such_host)/i) {              $destination .= 'destinationurl='.$destsymb;
  # default remote control to off          }
  if ($userenv{'remote'} ne 'on') { $userenv{'remote'} = 'off'; }      }
  foreach my $key (keys(%userenv)) {      if ($destination =~ m{^/adm/roles}) {
     $userenv.="environment.$key=$userenv{$key}\n";          $destination  .= ($destination =~ /\?/) ? '&' : '?';
  }          $destination .= 'source=login';
     }      }
     if (($userenv{'interface'}) && (!$FORM{'interface'})) {  
  $FORM{'interface'}=$userenv{'interface'};      my $windowinfo = Apache::lonhtmlcommon::scripttag('self.name="loncapaclient";');
     }      my $header = '<meta HTTP-EQUIV="Refresh" CONTENT="0; url='.$destination.'" />';
     $env{'environment.remote'}=$userenv{'remote'};      my $brcrum = [{'href' => '',
     if ($userenv{'texengine'} eq 'ttm') { $clientmathml=1; }                     'text' => 'Successful Login'},];
       my $start_page=&Apache::loncommon::start_page('Successful Login',
 # --------------- Do not trust query string to be put directly into environment                                                    $header,
     foreach ('imagesuppress','appletsuppress',                                                    {'bread_crumbs' => $brcrum,});
      'embedsuppress','fontenhance','blackwhite',      my $end_page  =&Apache::loncommon::end_page();
      'interface','localpath','localres') {  
  $FORM{$_}=~s/[\n\r\=]//gs;   my $continuelink='<a href="'.$destination.'">'.&mt('Continue').'</a>';
     }  # ------------------------------------------------- Output for successful login
 # --------------------------------------------------------- Write first profile  
       &Apache::loncommon::content_type($r,'text/html');
     {      $r->header_out('Set-cookie' => $cookie);
  my $idf=Apache::File->new(">$lonids/$cookie.id");      $r->send_http_header;
  unless (flock($idf,LOCK_EX)) {  
     &Apache::lonnet::logthis("<font color=blue>WARNING: ".      my %lt=&Apache::lonlocal::texthash(
    'Could not obtain exclusive lock in lonauth: '.$!);         'wel' => 'Welcome',
     $idf->close();         'pro' => 'Login problems?',
     return 'error: '.$!;         );
  }      my $loginhelp = &loginhelpdisplay($domain);
  if ($userenv ne '') { print $idf "$userenv\n"; }      if ($loginhelp) {
  print $idf "user.name=$username\n";          $loginhelp = '<p><a href="'.$loginhelp.'">'.$lt{'pro'}.'</a></p>';
  print $idf "user.domain=$domain\n";      }
  print $idf "user.home=$authhost\n";  
  print $idf "browser.type=$clientbrowser\n";      my $welcome = &mt('Welcome to the Learning[_1]Online[_2] Network with CAPA. Please wait while your session is being set up.','<i>','</i>');
  print $idf "browser.version=$clientversion\n";      $r->print(<<ENDSUCCESS);
  print $idf "browser.mathml=$clientmathml\n";  $start_page
  print $idf "browser.unicode=$clientunicode\n";  $windowinfo
  print $idf "browser.os=$clientos\n";  <h1>$lt{'wel'}</h1>
         if ($FORM{'localpath'}) {  $welcome
            print $idf "browser.localpath=$FORM{'localpath'}\n";  $loginhelp
            print $idf "browser.localres=$FORM{'localres'}\n";  $continuelink
         }  $end_page
         print $idf "server.domain=".$r->dir_config('lonDefDomain')."\n";  ENDSUCCESS
  print $idf "request.course.fn=\n";      return;
  print $idf "request.course.uri=\n";  }
  print $idf "request.course.sec=\n";  
  print $idf "request.role=cm\n";  # --------------------------------------------------------------- Failed login!
         print $idf "request.role.adv=$env{'user.adv'}\n";  
  print $idf "request.host=$ENV{'REMOTE_ADDR'}\n";  sub failed {
  if ($public) {      my ($r,$message,$form) = @_;
     print $idf "environment.remote=off\n";      (undef,undef,undef,my $clientmathml,my $clientunicode) =
  }          &Apache::loncommon::decode_user_agent();
  if ($FORM{'interface'}) {      my $args = {};
     $FORM{'interface'}=~s/\W//gs;      if ($clientunicode && !$clientmathml) {
     print $idf "browser.interface=$FORM{'interface'}\n";          $args = {'browser.unicode' => 1};
     $env{'browser.interface'}=$FORM{'interface'};      }
     foreach ('imagesuppress','appletsuppress',  
      'embedsuppress','fontenhance','blackwhite') {      my $start_page = &Apache::loncommon::start_page('Unsuccessful Login',undef,$args);
  if (($FORM{$_} eq 'true') ||      my $uname = &Apache::loncommon::cleanup_html($form->{'uname'});
     ($userenv{$_} eq 'on')) {      my $udom = &Apache::loncommon::cleanup_html($form->{'udom'});
     print $idf "browser.$_=on\n";      if (&Apache::lonnet::domain($udom,'description') eq '') {
  }          undef($udom);
     }      }
  }      my $retry = '/adm/login';
  if ($userroles ne '') { print $idf "$userroles"; }      if ($uname eq $form->{'uname'}) {
  $idf->close();          $retry .= '?username='.$uname;
     }      }
     $env{'request.role'}='cm';      if ($udom) {
     $env{'request.role.adv'}=$env{'user.adv'};          $retry .= (($retry=~/\?/)?'&amp;':'?').'domain='.$udom;
     $env{'browser.type'}=$clientbrowser;      }
 # -------------------------------------------------------------------- Log this      if (exists($form->{role})) {
           my $role = &Apache::loncommon::cleanup_html($form->{role});
     &Apache::lonnet::log($domain,$username,$authhost,          if ($role ne '') {
                          "Login $ENV{'REMOTE_ADDR'}");              $retry .= (($retry=~/\?/)?'&amp;':'?').'role='.$role;
           }
 # ------------------------------------------------- Check for critical messages      }
       if (exists($form->{symb})) {
     my @what=&Apache::lonnet::dump('critical',$domain,$username);          my $symb = &Apache::loncommon::cleanup_html($form->{symb});
     if ($what[0]) {          if ($symb ne '') {
  if (($what[0] ne 'con_lost') && ($what[0]!~/^error\:/)) {              $retry .= (($retry=~/\?/)?'&amp;':'?').'symb='.$symb;
     $lowerurl='/adm/email?critical=display';          }
         }      }
     }      my $end_page = &Apache::loncommon::end_page();
       &Apache::loncommon::content_type($r,'text/html');
 # ------------------------------------------------------------ Get cookie ready      $r->send_http_header;
       my @actions =
     if ($public or $lowerurl eq 'noredirect') { return $cookie; }           (&mt('Please [_1]log in again[_2].','<a href="'.$retry.'">','</a>'));
       my $loginhelp = &loginhelpdisplay($udom);
     $cookie="lonID=$cookie; path=/";      if ($loginhelp) {
 # -------------------------------------------------------- Menu script and info          push(@actions, '<a href="'.$loginhelp.'">'.&mt('Login problems?').'</a>');
     my $windowinfo=&Apache::lonmenu::open($clientos);      }
     my $startupremote=&Apache::lonmenu::startupremote($lowerurl);      #FIXME: link to helpdesk might be added here
     my $remoteinfo=&Apache::lonmenu::load_remote_msg($lowerurl);  
     my $setflags=&Apache::lonmenu::setflags();      $r->print(
     my $maincall=&Apache::lonmenu::maincall();         $start_page
     my $start_page=&Apache::loncommon::start_page('Successful Login',        .'<h2>'.&mt('Sorry ...').'</h2>'
   $startupremote);        .&Apache::lonhtmlcommon::confirm_success(&mt($message),1).'<br /><br />'
     my $end_page  =&Apache::loncommon::end_page();        .&Apache::lonhtmlcommon::actionbox(\@actions)
         .$end_page
     my $continuelink;      );
     if (($env{'browser.interface'} eq 'textual') ||   }
         ($env{'environment.remote'} eq 'off')) {  
  $continuelink="<a href=\"$lowerurl\">".&mt('Continue')."</a>";  # ------------------------------------------------------------------ Rerouting!
     }  
 # ------------------------------------------------- Output for successful login  sub reroute {
       my ($r) = @_;
     &Apache::loncommon::content_type($r,'text/html');      &Apache::loncommon::content_type($r,'text/html');
     $r->header_out('Set-cookie' => $cookie);      $r->send_http_header;
     $r->send_http_header;      my $msg='<b>'.&mt('Sorry ...').'</b><br />'
              .&mt('Please [_1]log in again[_2].');
     my %lt=&Apache::lonlocal::texthash(      &Apache::loncommon::simple_error_page($r,'Rerouting',$msg,{'no_auto_mt_msg' => 1});
        'wel' => 'Welcome',  }
        'mes' => 'Welcome to the Learning<i>Online</i> Network with CAPA. Please wait while your session is being set up',  
        'pro' => 'Problems',  # ---------------------------------------------------------------- Main handler
        'log' => 'loginproblems.html',  
        );  sub handler {
     $r->print(<<ENDSUCCESS);      my $r = shift;
 $start_page      my $londocroot = $r->dir_config('lonDocRoot');
 $setflags      my $form;
 $windowinfo  # Are we re-routing?
 <h1>$lt{'wel'}</h1>      if (-e "$londocroot/lon-status/reroute.txt") {
 $lt{'mes'}.<p>   &reroute($r);
 <a href="/adm/$lt{'log'}">$lt{'pro'}?</a></p>   return OK;
 $remoteinfo      }
 $maincall  
 $continuelink      &Apache::lonlocal::get_language_handle($r);
 $end_page  
 ENDSUCCESS  # -------------------------------- Prevent users from attempting to login twice
 }      my $handle = &Apache::lonnet::check_for_valid_session($r);
       if ($handle ne '') {
 # --------------------------------------------------------------- Failed login!          my $lonidsdir=$r->dir_config('lonIDsDir');
           if ($handle=~/^publicuser\_/) {
 sub failed {  # For "public user" - remove it, we apparently really want to login
     my ($r,$message) = @_;              unlink($r->dir_config('lonIDsDir')."/$handle.id");
     my $start_page = &Apache::loncommon::start_page('Unsuccessful Login');          } else {
     my $end_page   = &Apache::loncommon::end_page();  # Indeed, a valid token is found
               &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);
     my %lt=('sorry'  => &mt('Sorry ...'),      &Apache::loncommon::content_type($r,'text/html');
     'please' =>       $r->send_http_header;
     &mt('Please [_1]log in again[_2].',      my $start_page =
  "<a href=\"/adm/login?username=$FORM{'uname'}&domain=$FORM{'udom'}\">",          &Apache::loncommon::start_page('Already logged in');
  '</a>'),      my $end_page =
     'problemspage' => &mt('loginproblems.html'),          &Apache::loncommon::end_page();
     'problems'     => 'Problems',              my $dest = '/adm/roles';
     );              if ($env{'form.firsturl'} ne '') {
     &Apache::loncommon::content_type($r,'text/html');                  $dest = $env{'form.firsturl'};
     $r->send_http_header;              }
               $r->print(
     $r->print(<<ENDFAILED);                 $start_page
 $start_page                .'<p class="LC_warning">'.&mt('You are already logged in!').'</p>'
 <h1>$lt{'sorry'}</h1>                .'<p>'.&mt('Please either [_1]continue the current session[_2] or [_3]log out[_4].'
 <p><b>$message</b></p>                      ,'<a href="'.$dest.'">','</a>','<a href="/adm/logout">','</a>')
 <p>$lt{'please'}</p>                .'</p>'
 <p>                .$end_page
 <a href="/adm/$lt{'problemspage'}">$lt{'problems'}</a></p>              );
 $end_page              return OK;
 ENDFAILED          }
 }      }
   
 # ------------------------------------------------------------------ Rerouting!  # ---------------------------------------------------- No valid token, continue
   
 sub reroute {  
     my ($r) = @_;      my $buffer;
     &Apache::loncommon::content_type($r,'text/html');      if ($r->header_in('Content-length') > 0) {
     $r->send_http_header;   $r->read($buffer,$r->header_in('Content-length'),0);
     my $msg='<h1>Sorry ...</h1>      }
              Please <a href="/">log in again</a>.';      my %form;
     &Apache::loncommon::simple_error_page($r,'Rerouting',$msg);      foreach my $pair (split(/&/,$buffer)) {
 }         my ($name,$value) = split(/=/,$pair);
          $value =~ tr/+/ /;
 # ---------------------------------------------------------------- Main handler         $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
          $form{$name}=$value;
 sub handler {      }
     my $r = shift;  
       if ((!$form{'uname'}) || (!$form{'upass0'}) || (!$form{'udom'})) {
 # Are we re-routing?   &failed($r,'Username, password and domain need to be specified.',
     if (-e '/home/httpd/html/lon-status/reroute.txt') {   \%form);
  &reroute($r);          return OK;
  return OK;      }
     }  
   # split user logging in and "su"-user
     &Apache::lonlocal::get_language_handle($r);  
       ($form{'uname'},$form{'suname'})=split(/\:/,$form{'uname'});
 # -------------------------------- Prevent users from attempting to login twice      $form{'uname'} = &LONCAPA::clean_username($form{'uname'});
     my %cookies=CGI::Cookie->parse($r->header_in('Cookie'));      $form{'suname'}= &LONCAPA::clean_username($form{'suname'});
     my $lonid=$cookies{'lonID'};      $form{'udom'}  = &LONCAPA::clean_domain(  $form{'udom'});
     my $cookie;  
     if ($lonid) {      my $role   = $r->dir_config('lonRole');
  my $handle=$lonid->value;      my $domain = $r->dir_config('lonDefDomain');
         $handle=~s/\W//g;      my $prodir = $r->dir_config('lonUsersDir');
         my $lonidsdir=$r->dir_config('lonIDsDir');      my $contact_name = &mt('LON-CAPA helpdesk');
         if ((-e "$lonidsdir/$handle.id") && ($handle ne '')) {  
 # Indeed, a valid token is found  # ---------------------------------------- Get the information from login token
     &Apache::loncommon::content_type($r,'text/html');  
     $r->send_http_header;      my $tmpinfo=Apache::lonnet::reply('tmpget:'.$form{'logtoken'},
     my $start_page =                                         $form{'serverid'});
  &Apache::loncommon::start_page('Already logged in');  
     my $end_page =       my %sessiondata;
  &Apache::loncommon::end_page();      if ($form{'iptoken'}) {
     $r->print(<<ENDFAILED);          %sessiondata = &Apache::lonnet::tmpget($form{'iptoken'});
 $start_page          my $delete = &Apache::lonnet::tmpdel($form{'iptoken'});
 <h1>You are already logged in</h1>      }
 <p>Please either <a href="/adm/roles">continue the current session</a> or  
 <a href="/adm/logout">logout</a>.</p>      if (($tmpinfo=~/^error/) || ($tmpinfo eq 'con_lost') ||
 <p>          ($tmpinfo eq 'no_such_host')) {
 <a href="/adm/loginproblems.html">Problems?</a></p>   &failed($r,'Information needed to verify your login information is missing, inaccessible or expired.',\%form);
 $end_page          return OK;
 ENDFAILED      } else {
            return OK;   my $reply = &Apache::lonnet::reply('tmpdel:'.$form{'logtoken'},
  }     $form{'serverid'});
     }          if ( $reply ne 'ok' ) {
               &failed($r,'Session could not be opened.',\%form);
 # ---------------------------------------------------- No valid token, continue      &Apache::lonnet::logthis("ERROR got a reply of $reply when trying to contact ". $form{'serverid'}." to get login token");
       return OK;
    }
     my $buffer;      }
     $r->read($buffer,$r->header_in('Content-length'),0);  
     my @pairs=split(/&/,$buffer);      if (!&Apache::lonnet::domain($form{'udom'})) {
     my $pair; my $name; my $value;          &failed($r,'The domain you provided is not a valid LON-CAPA domain.',\%form);
     undef %FORM;          return OK;
     %FORM=();      }
     foreach $pair (@pairs) {  
        ($name,$value) = split(/=/,$pair);      my ($key,$firsturl,$rolestr,$symbstr)=split(/&/,$tmpinfo);
        $value =~ tr/+/ /;      if ($rolestr) {
        $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;          $rolestr = &unescape($rolestr);
        $FORM{$name}=$value;      }
     }       if ($symbstr) {
           $symbstr= &unescape($symbstr);
     if ((!$FORM{'uname'}) || (!$FORM{'upass0'}) || (!$FORM{'udom'})) {      }
  failed($r,'Username, password and domain need to be specified.');      if ($rolestr =~ /^role=/) {
         return OK;          (undef,$form{'role'}) = split('=',$rolestr);
     }      }
       if ($symbstr =~ /^symb=/) {
 # split user logging in and "su"-user          (undef,$form{'symb'}) = split('=',$symbstr);
       }
     ($FORM{'uname'},$FORM{'suname'})=split(/\:/,$FORM{'uname'});  
     $FORM{'uname'} =~ s/\W//g;      my $upass = $ENV{HTTPS} ? join("", @form{qw(upass0 upass1 upass2)})
     $FORM{'suname'} =~ s/\W//g;          : decrypt($key, @form{qw(upass0 upass1 upass2)});
     $FORM{'udom'}  =~ s/\W//g;  
   # ---------------------------------------------------------------- Authenticate
     my $role   = $r->dir_config('lonRole');  
     my $domain = $r->dir_config('lonDefDomain');      my %domconfig = &Apache::lonnet::get_dom('configuration',['usercreation'],$form{'udom'});
     my $prodir = $r->dir_config('lonUsersDir');      my ($cancreate,$statustocreate) =
           &Apache::createaccount::get_creation_controls($form{'udom'},$domconfig{'usercreation'});
 # ---------------------------------------- Get the information from login token      my $defaultauth;
       if (ref($cancreate) eq 'ARRAY') {
     my $tmpinfo=Apache::lonnet::reply('tmpget:'.$FORM{'logtoken'},          if (grep(/^login$/,@{$cancreate})) {
                                       $FORM{'serverid'});              $defaultauth = 1;
           }
     if (($tmpinfo=~/^error/) || ($tmpinfo eq 'con_lost')) {      }
  failed($r,'Information needed to verify your login information is missing, inaccessible or expired.');      my $clientcancheckhost = 1;
         return OK;      my $authhost=Apache::lonnet::authenticate($form{'uname'},$upass,
     } else {                                                $form{'udom'},$defaultauth,
         unless (&Apache::lonnet::reply('tmpdel:'.$FORM{'logtoken'},                                                $clientcancheckhost);
                                          $FORM{'serverid'}) eq 'ok') {     
             &failed($r,'Session could not be opened.');  # --------------------------------------------------------------------- Failed?
  }  
     }      if ($authhost eq 'no_host') {
     my ($key,$firsturl)=split(/&/,$tmpinfo);   &failed($r,'Username and/or password could not be authenticated.',
    \%form);
     my $keybin=pack("H16",$key);          return OK;
       } elsif ($authhost eq 'no_account_on_host') {
     my $cipher;          if ($defaultauth) {
     if ($Crypt::DES::VERSION>=2.03) {              my $domdesc = &Apache::lonnet::domain($form{'udom'},'description');
  $cipher=new Crypt::DES $keybin;              unless (&check_can_host($r,\%form,'no_account_on_host',$domdesc)) {
     }                  return OK;
     else {              }
  $cipher=new DES $keybin;              my $start_page =
     }                  &Apache::loncommon::start_page('Create a user account in LON-CAPA');
     my $upass='';              my $lonhost = $r->dir_config('lonHostID');
     for (my $i=0;$i<=2;$i++) {              my $origmail = $Apache::lonnet::perlvar{'lonSupportEMail'};
  my $chunk=              my $contacts =
     $cipher->decrypt(unpack("a8",pack("H16",substr($FORM{'upass'.$i},0,16))));                  &Apache::loncommon::build_recipient_list(undef,'helpdeskmail',
                                                           $form{'udom'},$origmail);
  $chunk.=              my ($contact_email) = split(',',$contacts);
     $cipher->decrypt(unpack("a8",pack("H16",substr($FORM{'upass'.$i},16,16))));              my $output =
                   &Apache::createaccount::username_check($form{'uname'},$form{'udom'},
  $chunk=substr($chunk,1,ord(substr($chunk,0,1)));                                                         $domdesc,'',$lonhost,
  $upass.=$chunk;                                                         $contact_email,$contact_name,
     }                                                         undef,$statustocreate);
               &Apache::loncommon::content_type($r,'text/html');
 # ---------------------------------------------------------------- Authenticate              $r->send_http_header;
     my $authhost=Apache::lonnet::authenticate($FORM{'uname'},              &Apache::createaccount::print_header($r,$start_page);
                                               $upass,              $r->print('<h3>'.&mt('Account creation').'</h3>'.
                                               $FORM{'udom'});                        &mt('Although your username and password were authenticated, you do not currently have a LON-CAPA account at this institution.').'<br />'.
                             $output.&Apache::loncommon::end_page());
 # --------------------------------------------------------------------- Failed?              return OK;
           } else {
     if ($authhost eq 'no_host') {              &failed($r,'Although your username and password were authenticated, you do not currently have a LON-CAPA account in this domain, and you are not permitted to create one.',\%form);
  failed($r,'Username and/or password could not be authenticated.');              return OK;
         return OK;          }
     }      }
   
     if (($firsturl eq '') ||       if (($firsturl eq '') ||
  ($firsturl=~/^\/adm\/(logout|remote)/)) {   ($firsturl=~/^\/adm\/(logout|remote)/)) {
  $firsturl='/adm/roles';   $firsturl='/adm/roles';
     }      }
 # --------------------------------- Are we attempting to login as somebody else?  
     if ($FORM{'suname'}) {      my $hosthere;
 # ------------ see if the original user has enough privileges to pull this stunt      if ($form{'iptoken'}) {
  if (&Apache::lonnet::privileged($FORM{'uname'},$FORM{'udom'})) {          if (($sessiondata{'domain'} eq $form{'udom'}) &&
 # ---------------------------------------------------- see if the su-user exists              ($sessiondata{'username'} eq $form{'uname'})) {
     unless (&Apache::lonnet::homeserver($FORM{'suname'},$FORM{'udom'})              $hosthere = 1;
  eq 'no_host') {          }
  &Apache::lonnet::logthis(&Apache::lonnet::homeserver($FORM{'suname'},$FORM{'udom'}));      }
 # ------------------------------ see if the su-user is not too highly privileged  
  unless (&Apache::lonnet::privileged($FORM{'suname'},$FORM{'udom'})) {  # --------------------------------- Are we attempting to login as somebody else?
 # -------------------------------------------------------- actually switch users      if ($form{'suname'}) {
     &Apache::lonnet::logperm('User '.$FORM{'uname'}.' at '.$FORM{'udom'}.  # ------------ see if the original user has enough privileges to pull this stunt
  ' logging in as '.$FORM{'suname'});   if (&Apache::lonnet::privileged($form{'uname'},$form{'udom'})) {
     $FORM{'uname'}=$FORM{'suname'};  # ---------------------------------------------------- see if the su-user exists
  } else {      unless (&Apache::lonnet::homeserver($form{'suname'},$form{'udom'})
     &Apache::lonnet::logthis('Attempted switch user to privileged user');   eq 'no_host') {
  }   &Apache::lonnet::logthis(&Apache::lonnet::homeserver($form{'suname'},$form{'udom'}));
     }  # ------------------------------ see if the su-user is not too highly privileged
  } else {   unless (&Apache::lonnet::privileged($form{'suname'},$form{'udom'})) {
     &Apache::lonnet::logthis('Non-privileged user attempting switch user');  # -------------------------------------------------------- actually switch users
  }      &Apache::lonnet::logperm('User '.$form{'uname'}.' at '.$form{'udom'}.
     }   ' logging in as '.$form{'suname'});
     &success($r,$FORM{'uname'},$FORM{'udom'},$authhost,$firsturl);      $form{'uname'}=$form{'suname'};
     return OK;   } else {
 }      &Apache::lonnet::logthis('Attempted switch user to privileged user');
    }
 1;      }
 __END__   } else {
       &Apache::lonnet::logthis('Non-privileged user attempting switch user');
    }
       }
   
       my ($is_balancer,$otherserver);
   
       unless ($hosthere) {
           ($is_balancer,$otherserver) =
               &Apache::lonnet::check_loadbalancing($form{'uname'},$form{'udom'});
       }
   
       if ($is_balancer) {
           if (!$otherserver) {
               ($otherserver) = &Apache::lonnet::choose_server($form{'udom'});
           }
           if ($otherserver) {
               &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef,
                        \%form);
               my $switchto = '/adm/switchserver?otherserver='.$otherserver;
               if (($firsturl) && ($firsturl ne '/adm/switchserver') && ($firsturl ne '/adm/roles')) {
                   $switchto .= '&origurl='.$firsturl;
               }
               if ($form{'role'}) {
                   $switchto .= '&role='.$form{'role'};
               }
               if ($form{'symb'}) {
                   $switchto .= '&symb='.$form{'symb'};
               }
               $r->internal_redirect($switchto);
           } else {
               $r->print(&noswitch());
           }
           return OK;
       } else {
           if (!&check_can_host($r,\%form,$authhost)) {
               my ($otherserver) = &Apache::lonnet::choose_server($form{'udom'});
               if ($otherserver) {
                   &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef,
                            \%form);
                   my $switchto = '/adm/switchserver?otherserver='.$otherserver;
                   if (($firsturl) && ($firsturl ne '/adm/switchserver') && ($firsturl ne '/adm/roles')) {
                       $switchto .= '&origurl='.$firsturl;
                   }
                   if ($form{'role'}) {
                       $switchto .= '&role='.$form{'role'};
                   }
                   if ($form{'symb'}) {
                       $switchto .= '&symb='.$form{'symb'};
                   }
                   $r->internal_redirect($switchto);
               } else {
                   $r->print(&noswitch());
               }
               return OK;
           }
   
   # ------------------------------------------------------- Do the load balancing
   
   # ---------------------------------------------------------- Determine own load
           my $loadlim = $r->dir_config('lonLoadLim');
           my $loadavg;
           {
               my $loadfile=Apache::File->new('/proc/loadavg');
               $loadavg=<$loadfile>;
           }
           $loadavg =~ s/\s.*//g;
           my $loadpercent=sprintf("%.1f",100*$loadavg/$loadlim);
           my $userloadpercent=&Apache::lonnet::userload();
   
   # ---------------------------------------------------------- Are we overloaded?
           if ((($userloadpercent>100.0)||($loadpercent>100.0))) {
               my $unloaded=Apache::lonnet::spareserver($loadpercent,$userloadpercent,1,$form{'udom'});
               if (!$unloaded) {
                   ($unloaded) = &Apache::lonnet::choose_server($form{'udom'});
               }
               if ($unloaded) {
                   &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',
                            undef,\%form);
                   $r->internal_redirect('/adm/switchserver?otherserver='.$unloaded.'&origurl='.$firsturl);
                   return OK;
               }
           }
           &success($r,$form{'uname'},$form{'udom'},$authhost,$firsturl,undef,
                    \%form);
           return OK;
       }
   }
   
   sub decrypt {
       my ($key, @chunks) = @_;
   
       my $keybin = pack("H16",$key);
   
       my $cipher;
       if ($Crypt::DES::VERSION >= 2.03) {
           $cipher = new Crypt::DES $keybin;
       } else {
           $cipher = new DES $keybin;
       }
   
       my $upass='';
       for (my $i=0;$i<=2;$i++) {
           my $chunk =
               $cipher->decrypt(
                   unpack("a8",pack("H16",substr($chunks[$i],0,16))));
   
           $chunk .=
               $cipher->decrypt(
                   unpack("a8",pack("H16",substr($chunks[$i],16,16))));
   
           $chunk = substr($chunk,1,ord(substr($chunk,0,1)));
           $upass .= $chunk;
       }
       return $upass;
   }
   
   sub check_can_host {
       my ($r,$form,$authhost,$domdesc) = @_;
       return unless (ref($form) eq 'HASH');
       my $canhost = 1;
       my $lonhost = $r->dir_config('lonHostID');
       my $udom = $form->{'udom'};
       my @intdoms;
       my $internet_names = &Apache::lonnet::get_internet_names($lonhost);
       if (ref($internet_names) eq 'ARRAY') {
           @intdoms = @{$internet_names};
       }
       my $uprimary_id = &Apache::lonnet::domain($udom,'primary');
       my $uint_dom = &Apache::lonnet::internet_dom($uprimary_id);
       unless ($uint_dom ne '' && grep(/^\Q$uint_dom\E$/,@intdoms)) {
           my $machine_dom = &Apache::lonnet::host_domain($lonhost);
           my $hostname = &Apache::lonnet::hostname($lonhost);
           my $serverhomeID = &Apache::lonnet::get_server_homeID($hostname);
           my $serverhomedom = &Apache::lonnet::host_domain($serverhomeID);
           my %defdomdefaults = &Apache::lonnet::get_domain_defaults($serverhomedom);
           my %udomdefaults = &Apache::lonnet::get_domain_defaults($udom);
           my $loncaparev;
           if ($authhost eq 'no_account_on_host') {
               $loncaparev = &Apache::lonnet::get_server_loncaparev($machine_dom);
           } else {
               $loncaparev = &Apache::lonnet::get_server_loncaparev($machine_dom,$lonhost);
           }
           $canhost = &Apache::lonnet::can_host_session($udom,$lonhost,$loncaparev,
                                                        $udomdefaults{'remotesessions'},
                                                        $defdomdefaults{'hostedsessions'});
       }
       unless ($canhost) {
           if ($authhost eq 'no_account_on_host') {
               my $checkloginvia = 1;
               my ($login_host,$hostname) =
                   &Apache::lonnet::choose_server($udom,$checkloginvia);
               &Apache::loncommon::content_type($r,'text/html');
               $r->send_http_header;
               if ($login_host ne '') {
                   my $protocol = $Apache::lonnet::protocol{$login_host};
                   $protocol = 'http' if ($protocol ne 'https');
                   my $newurl = $protocol.'://'.$hostname.'/adm/createaccount';
                   $r->print(&Apache::loncommon::start_page('Create a user account in LON-CAPA').
                             '<h3>'.&mt('Account creation').'</h3>'.
                             &mt('You do not currently have a LON-CAPA account at this institution.').'<br />'.
                             '<p>'.&mt('You will be able to create one by logging into a LON-CAPA server within the [_1] domain.',$domdesc).'</p>'.
                             '<p>'.&mt('[_1]Log in[_2]','<a href="'.$newurl.'">','</a>').
                             &Apache::loncommon::end_page());
               } else {
                   $r->print(&Apache::loncommon::start_page('Access to LON-CAPA unavailable').
                             '<h3>'.&mt('Account creation unavailable').'</h3>'.
                             &mt('You do not currently have a LON-CAPA account at this institution.').'<br />'.
                             '<p>'.&mt('Currently a LON-CAPA server is not available within the [_1] domain for you to log-in to, to create an account.',$domdesc).'</p>'.
                             &Apache::loncommon::end_page());
               }
           } else {
               &success($r,$form->{'uname'},$udom,$authhost,'noredirect',undef,
                        $form);
               my ($otherserver) = &Apache::lonnet::choose_server($udom);
               $r->internal_redirect('/adm/switchserver?otherserver='.$otherserver);
           }
       }
       return $canhost;
   }
   
   sub noswitch {
       my $result = &Apache::loncommon::start_page('Access to LON-CAPA unavailable').
                    '<h3>'.&mt('Session unavailable').'</h3>'.
                    &mt('This LON-CAPA server is unable to host your session.').'<br />'.
                    '<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;
       my $lang = &Apache::lonlocal::current_language();
       if ($login_help) {
           my $dom = $authdomain;
           if ($dom eq '') {
               $dom = &Apache::lonnet::default_login_domain();
           }
           my %domconfhash = &Apache::loncommon::get_domainconf($dom);
           my $loginhelp_url;
           if ($lang) {
               $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;
           } else {
               return '/adm/loginproblems.html';
           }
       }
       return;
   }
   
   1;
   __END__
   
   
Removed from v.1.75  
changed lines
  Added in v.1.136

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