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Diff for /loncom/auth/lonauth.pm between versions 1.107 and 1.141

version 1.107, 2010/07/24 17:42:46 version 1.141, 2016/12/05 00:51:43
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 qw(:DEFAULT :match);
 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 HTML::Entities;  use Apache::File();
    use HTML::Entities;
 # ------------------------------------------------------------ Successful login   
 sub success {  # ------------------------------------------------------------ Successful login
     my ($r, $username, $domain, $authhost, $lowerurl, $extra_env,  sub success {
  $form) = @_;      my ($r, $username, $domain, $authhost, $lowerurl, $extra_env,
    $form) = @_;
 # ------------------------------------------------------------ Get cookie ready  
     my $cookie =  # ------------------------------------------------------------ Get cookie ready
  &Apache::loncommon::init_user_environment($r, $username, $domain,      my $cookie =
   $authhost, $form,   &Apache::loncommon::init_user_environment($r, $username, $domain,
   {'extra_env' => $extra_env,});    $authhost, $form,
     {'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,  
                          "Login $ENV{'REMOTE_ADDR'}");      &Apache::lonnet::log($domain,$username,$authhost,
                            "Login $ENV{'REMOTE_ADDR'}");
 # ------------------------------------------------- Check for critical messages  
   # ------------------------------------------------- Check for critical messages
     my @what=&Apache::lonnet::dump('critical',$domain,$username);  
     if ($what[0]) {      my @what=&Apache::lonnet::dump('critical',$domain,$username);
  if (($what[0] ne 'con_lost') && ($what[0]!~/^error\:/)) {      if ($what[0]) {
     $lowerurl='/adm/email?critical=display';   if (($what[0] ne 'con_lost') && ($what[0]!~/^error\:/)) {
         }      $lowerurl='/adm/email?critical=display';
     }          }
       }
 # ------------------------------------------------------------ Get cookie ready  
     $cookie="lonID=$cookie; path=/";  # ------------------------------------------------------------ Get cookie ready
 # -------------------------------------------------------- Menu script and info      $cookie="lonID=$cookie; path=/";
     my $destination = $lowerurl;  # -------------------------------------------------------- Menu script and info
       my $destination = $lowerurl;
     if (defined($form->{role})) {  
         my $envkey = 'user.role.'.$form->{role};      if (defined($form->{role})) {
         my $now=time;          my $envkey = 'user.role.'.$form->{role};
         my $then=$env{'user.login.time'};          my $now=time;
         my $refresh=$env{'user.refresh.time'};          my $then=$env{'user.login.time'};
         if (exists($env{$envkey})) {          my $refresh=$env{'user.refresh.time'};
             my ($role,$where,$trolecode,$tstart,$tend,$tremark,$tstatus);          my $update=$env{'user.update.time'};
             &Apache::lonnet::role_status($envkey,$then,$refresh,$now,\$role,\$where,          if (!$update) {
                                          \$trolecode,\$tstatus,\$tstart,\$tend);              $update = $then;
             if ($tstatus eq 'is') {          }
                 $destination  .= ($destination =~ /\?/) ? '&' : '?';          if (exists($env{$envkey})) {
                 my $newrole = &HTML::Entities::encode($form->{role},'"<>&');              my ($role,$where,$trolecode,$tstart,$tend,$tremark,$tstatus);
                 $destination .= 'selectrole=1&'.$newrole.'=1';              &Apache::lonnet::role_status($envkey,$update,$refresh,$now,\$role,\$where,
             }                                           \$trolecode,\$tstatus,\$tstart,\$tend);
         }              if ($tstatus eq 'is') {
     }                  $destination  .= ($destination =~ /\?/) ? '&' : '?';
     if (defined($form->{symb})) {                  my $newrole = &HTML::Entities::encode($form->{role},'"<>&');
         my $destsymb = $form->{symb};                  $destination .= 'selectrole=1&'.$newrole.'=1';
         $destination  .= ($destination =~ /\?/) ? '&' : '?';              }
         if ($destsymb =~ /___/) {          }
             # FIXME Need to deal with encrypted symbs and urls as needed.      }
             my ($map,$resid,$desturl)=split(/___/,$destsymb);      if (defined($form->{symb})) {
             unless ($desturl=~/^(adm|uploaded|editupload|public)/) {          my $destsymb = $form->{symb};
                 $desturl = &Apache::lonnet::clutter($desturl);          $destination  .= ($destination =~ /\?/) ? '&' : '?';
             }          if ($destsymb =~ /___/) {
             $desturl = &HTML::Entities::encode($desturl,'"<>&');              # FIXME Need to deal with encrypted symbs and urls as needed.
             $destsymb = &HTML::Entities::encode($destsymb,'"<>&');              my ($map,$resid,$desturl)=split(/___/,$destsymb);
             $destination .= '&destinationurl='.$desturl.              $desturl = &Apache::lonnet::clutter($desturl);
                             '&destsymb='.$destsymb;              $desturl = &HTML::Entities::encode($desturl,'"<>&');
         } else {              $destsymb = &HTML::Entities::encode($destsymb,'"<>&');
             $destsymb = &HTML::Entities::encode($destsymb,'"<>&');              $destination .= 'destinationurl='.$desturl.
             $destination .= '&destinationurl='.$destsymb;                              '&destsymb='.$destsymb;
         }          } else {
     }              $destsymb = &HTML::Entities::encode($destsymb,'"<>&');
               $destination .= 'destinationurl='.$destsymb;
     my $windowinfo = Apache::lonhtmlcommon::scripttag('self.name="loncapaclient";');          }
     my $header = '<meta HTTP-EQUIV="Refresh" CONTENT="0; url='.$destination.'" />';      }
     my $brcrum = [{'href' => '',      if ($destination =~ m{^/adm/roles}) {
                    'text' => 'Successful Login'},];          $destination  .= ($destination =~ /\?/) ? '&' : '?';
     my $start_page=&Apache::loncommon::start_page('Successful Login',          $destination .= 'source=login';
                                                   $header,      }
                                                   {'bread_crumbs' => $brcrum,});  
     my $end_page  =&Apache::loncommon::end_page();      my $windowinfo = Apache::lonhtmlcommon::scripttag('self.name="loncapaclient";');
       my $header = '<meta HTTP-EQUIV="Refresh" CONTENT="0; url='.$destination.'" />';
  my $continuelink='<a href="'.$destination.'">'.&mt('Continue').'</a>';      my $brcrum = [{'href' => '',
 # ------------------------------------------------- Output for successful login                     'text' => 'Successful Login'},];
       my $args = {'bread_crumbs' => $brcrum,};
     &Apache::loncommon::content_type($r,'text/html');      unless ((defined($form->{role})) || (defined($form->{symb}))) {
     $r->header_out('Set-cookie' => $cookie);          my $update=$env{'user.update.time'};
     $r->send_http_header;          if (!$update) {
               $update = $env{'user.login.time'};
     my %lt=&Apache::lonlocal::texthash(          }
        'wel' => 'Welcome',          my %roles_in_env;
        'mes' => 'Welcome to the Learning<i>Online</i> Network with CAPA. Please wait while your session is being set up.',          my $showcount = &Apache::lonroles::roles_from_env(\%roles_in_env,$update);
        'pro' => 'Login problems?',          if ($showcount == 1) {
        'log' => 'loginproblems.html',              foreach my $rolecode (keys(%roles_in_env)) {
        );                  my ($cid) = ($rolecode =~ m{^\Quser.role.st./\E($match_domain/$match_courseid)(?:/|$)});
     $r->print(<<ENDSUCCESS);                  if ($cid) {
 $start_page                      my %coursedescription =
 $windowinfo                          &Apache::lonnet::coursedescription($cid,{'one_time' => '1'});
 <h1>$lt{'wel'}</h1>                      if ($coursedescription{'type'} eq 'Placement') {
 $lt{'mes'}<p>                          $args->{'crstype'} = 'Placement';
 <a href="/adm/$lt{'log'}">$lt{'pro'}</a></p>                      }
 $continuelink                      last;
 $end_page                  }
 ENDSUCCESS              }
 }          }
       }
 # --------------------------------------------------------------- Failed login!      my $start_page=&Apache::loncommon::start_page('Successful Login',
                                                     $header,$args);
 sub failed {      my $end_page  =&Apache::loncommon::end_page();
     my ($r,$message,$form) = @_;  
     my $start_page = &Apache::loncommon::start_page('Unsuccessful Login',undef);   my $continuelink='<a href="'.$destination.'">'.&mt('Continue').'</a>';
     my $retry = '/adm/login?username='.$form->{'uname'}.  # ------------------------------------------------- Output for successful login
                 '&domain='.$form->{'udom'};  
     if (exists($form->{role})) {      &Apache::loncommon::content_type($r,'text/html');
         $retry .= '&role='.$form->{role};      $r->header_out('Set-cookie' => $cookie);
     }      $r->send_http_header;
     if (exists($form->{symb})) {  
         $retry .= '&symb='.$form->{symb};      my %lt=&Apache::lonlocal::texthash(
     }         'wel' => 'Welcome',
     my $end_page   = &Apache::loncommon::end_page();         'pro' => 'Login problems?',
     &Apache::loncommon::content_type($r,'text/html');         );
     $r->send_http_header;      my $loginhelp = &loginhelpdisplay($domain);
     $r->print(      if ($loginhelp) {
        $start_page          $loginhelp = '<p><a href="'.$loginhelp.'">'.$lt{'pro'}.'</a></p>';
       .'<h1>'.&mt('Sorry ...').'</h1>'      }
       .'<p class="LC_warning">'.&mt($message).'</p>'  
       .'<p>'.&mt('Please [_1]log in again[_2].','<a href="'.$retry.'">','</a>')      my $welcome = &mt('Welcome to the Learning[_1]Online[_2] Network with CAPA. Please wait while your session is being set up.','<i>','</i>');
       .'</p>'      $r->print(<<ENDSUCCESS);
       .'<p><a href="/adm/loginproblems.html">'.&mt('Login problems?').'</a></p>'  $start_page
       .$end_page  $windowinfo
     );  <h1>$lt{'wel'}</h1>
  }  $welcome
   $loginhelp
 # ------------------------------------------------------------------ Rerouting!  $continuelink
   $end_page
 sub reroute {  ENDSUCCESS
     my ($r) = @_;      return;
     &Apache::loncommon::content_type($r,'text/html');  }
     $r->send_http_header;  
     my $msg='<h1>'.&mt('Sorry ...').'</h1>'  # --------------------------------------------------------------- Failed login!
            .&mt('Please [_1]log in again[_2].');  
     &Apache::loncommon::simple_error_page($r,'Rerouting',$msg);  sub failed {
 }      my ($r,$message,$form) = @_;
       (undef,undef,undef,my $clientmathml,my $clientunicode) =
 # ---------------------------------------------------------------- Main handler          &Apache::loncommon::decode_user_agent();
       my $args = {};
 sub handler {      if ($clientunicode && !$clientmathml) {
     my $r = shift;          $args = {'browser.unicode' => 1};
     my $form;      }
 # Are we re-routing?  
     if (-e '/home/httpd/html/lon-status/reroute.txt') {      my $start_page = &Apache::loncommon::start_page('Unsuccessful Login',undef,$args);
  &reroute($r);      my $uname = &Apache::loncommon::cleanup_html($form->{'uname'});
  return OK;      my $udom = &Apache::loncommon::cleanup_html($form->{'udom'});
     }      if (&Apache::lonnet::domain($udom,'description') eq '') {
           undef($udom);
     &Apache::lonlocal::get_language_handle($r);      }
       my $retry = '/adm/login';
 # -------------------------------- Prevent users from attempting to login twice      if ($uname eq $form->{'uname'}) {
     my $handle = &Apache::lonnet::check_for_valid_session($r);          $retry .= '?username='.$uname;
     if ($handle ne '') {      }
         my $lonidsdir=$r->dir_config('lonIDsDir');      if ($udom) {
         if ($handle=~/^publicuser\_/) {          $retry .= (($retry=~/\?/)?'&amp;':'?').'domain='.$udom;
 # For "public user" - remove it, we apparently really want to login      }
             unlink($r->dir_config('lonIDsDir')."/$handle.id");      if (exists($form->{role})) {
         } else {          my $role = &Apache::loncommon::cleanup_html($form->{role});
 # Indeed, a valid token is found          if ($role ne '') {
             &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);              $retry .= (($retry=~/\?/)?'&amp;':'?').'role='.$role;
     &Apache::loncommon::content_type($r,'text/html');          }
     $r->send_http_header;      }
     my $start_page =       if (exists($form->{symb})) {
         &Apache::loncommon::start_page('Already logged in');          my $symb = &Apache::loncommon::cleanup_html($form->{symb});
     my $end_page =           if ($symb ne '') {
         &Apache::loncommon::end_page();              $retry .= (($retry=~/\?/)?'&amp;':'?').'symb='.$symb;
             my $dest = '/adm/roles';          }
             if ($env{'form.firsturl'} ne '') {      }
                 $dest = $env{'form.firsturl'};      my $end_page = &Apache::loncommon::end_page();
             }      &Apache::loncommon::content_type($r,'text/html');
             $r->print(      $r->send_http_header;
                $start_page      my @actions =
               .'<h1>'.&mt('You are already logged in!').'</h1>'           (&mt('Please [_1]log in again[_2].','<a href="'.$retry.'">','</a>'));
               .'<p>'.&mt('Please either [_1]continue the current session[_2] or [_3]log out[_4].'      my $loginhelp = &loginhelpdisplay($udom);
                     ,'<a href="'.$dest.'">','</a>','<a href="/adm/logout">','</a>')      if ($loginhelp) {
               .'</p>'          push(@actions, '<a href="'.$loginhelp.'">'.&mt('Login problems?').'</a>');
               .$end_page      }
             );      #FIXME: link to helpdesk might be added here
             return OK;  
         }      $r->print(
     }         $start_page
         .'<h2>'.&mt('Sorry ...').'</h2>'
 # ---------------------------------------------------- No valid token, continue        .&Apache::lonhtmlcommon::confirm_success(&mt($message),1).'<br /><br />'
         .&Apache::lonhtmlcommon::actionbox(\@actions)
         .$end_page
     my $buffer;      );
     if ($r->header_in('Content-length') > 0) {   }
  $r->read($buffer,$r->header_in('Content-length'),0);  
     }  # ------------------------------------------------------------------ Rerouting!
     my %form;  
     foreach my $pair (split(/&/,$buffer)) {  sub reroute {
        my ($name,$value) = split(/=/,$pair);      my ($r) = @_;
        $value =~ tr/+/ /;      &Apache::loncommon::content_type($r,'text/html');
        $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;      $r->send_http_header;
        $form{$name}=$value;      my $msg='<b>'.&mt('Sorry ...').'</b><br />'
     }              .&mt('Please [_1]log in again[_2].');
       &Apache::loncommon::simple_error_page($r,'Rerouting',$msg,{'no_auto_mt_msg' => 1});
     if ((!$form{'uname'}) || (!$form{'upass0'}) || (!$form{'udom'})) {  }
  &failed($r,'Username, password and domain need to be specified.',  
  \%form);  # ---------------------------------------------------------------- Main handler
         return OK;  
     }  sub handler {
       my $r = shift;
 # split user logging in and "su"-user      my $londocroot = $r->dir_config('lonDocRoot');
   # Are we re-routing?
     ($form{'uname'},$form{'suname'})=split(/\:/,$form{'uname'});      if (-e "$londocroot/lon-status/reroute.txt") {
     $form{'uname'} = &LONCAPA::clean_username($form{'uname'});   &reroute($r);
     $form{'suname'}= &LONCAPA::clean_username($form{'suname'});   return OK;
     $form{'udom'}  = &LONCAPA::clean_domain(  $form{'udom'});      }
   
     my $role   = $r->dir_config('lonRole');      &Apache::lonlocal::get_language_handle($r);
     my $domain = $r->dir_config('lonDefDomain');  
     my $prodir = $r->dir_config('lonUsersDir');  # -------------------------------- Prevent users from attempting to login twice
     my $contact_name = &mt('LON-CAPA helpdesk');      my $handle = &Apache::lonnet::check_for_valid_session($r);
       if ($handle ne '') {
 # ---------------------------------------- Get the information from login token          my $lonidsdir=$r->dir_config('lonIDsDir');
           if ($handle=~/^publicuser\_/) {
     my $tmpinfo=Apache::lonnet::reply('tmpget:'.$form{'logtoken'},  # For "public user" - remove it, we apparently really want to login
                                       $form{'serverid'});              unlink($r->dir_config('lonIDsDir')."/$handle.id");
           } else {
     if (($tmpinfo=~/^error/) || ($tmpinfo eq 'con_lost')) {  # Indeed, a valid token is found
  &failed($r,'Information needed to verify your login information is missing, inaccessible or expired.',\%form);              &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);
         return OK;      &Apache::loncommon::content_type($r,'text/html');
     } else {      $r->send_http_header;
  my $reply = &Apache::lonnet::reply('tmpdel:'.$form{'logtoken'},      my $start_page =
    $form{'serverid'});          &Apache::loncommon::start_page('Already logged in');
         if ( $reply ne 'ok' ) {      my $end_page =
             &failed($r,'Session could not be opened.',\%form);          &Apache::loncommon::end_page();
     &Apache::lonnet::logthis("ERROR got a reply of $reply when trying to contact ". $form{'serverid'}." to get login token");              my $dest = '/adm/roles';
     return OK;              if ($env{'form.firsturl'} ne '') {
  }                  $dest = $env{'form.firsturl'};
     }              }
               $r->print(
     if (!&Apache::lonnet::domain($form{'udom'})) {                 $start_page
         &failed($r,'The domain you provided is not a valid LON-CAPA domain.',\%form);                .'<p class="LC_warning">'.&mt('You are already logged in!').'</p>'
         return OK;                .'<p>'.&mt('Please either [_1]continue the current session[_2] or [_3]log out[_4].'
     }                      ,'<a href="'.$dest.'">','</a>','<a href="/adm/logout">','</a>')
                 .'</p>'
     my ($key,$firsturl,$rolestr,$symbstr)=split(/&/,$tmpinfo);                .$end_page
     if ($rolestr) {              );
         $rolestr = &unescape($rolestr);              return OK;
     }          }
     if ($symbstr) {      }
         $symbstr= &unescape($symbstr);  
     }  # ---------------------------------------------------- No valid token, continue
     if ($rolestr =~ /^role=/) {  
         (undef,$form{'role'}) = split('=',$rolestr);  
     }      my $buffer;
     if ($symbstr =~ /^symb=/) {       if ($r->header_in('Content-length') > 0) {
         (undef,$form{'symb'}) = split('=',$symbstr);   $r->read($buffer,$r->header_in('Content-length'),0);
     }      }
       my %form;
     my $keybin=pack("H16",$key);      foreach my $pair (split(/&/,$buffer)) {
          my ($name,$value) = split(/=/,$pair);
     my $cipher;         $value =~ tr/+/ /;
     if ($Crypt::DES::VERSION>=2.03) {         $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
  $cipher=new Crypt::DES $keybin;         $form{$name}=$value;
     }      }
     else {  
  $cipher=new DES $keybin;      if ((!$form{'uname'}) || (!$form{'upass0'}) || (!$form{'udom'})) {
     }   &failed($r,'Username, password and domain need to be specified.',
     my $upass='';   \%form);
     for (my $i=0;$i<=2;$i++) {          return OK;
  my $chunk=      }
     $cipher->decrypt(unpack("a8",pack("H16",substr($form{'upass'.$i},0,16))));  
   # split user logging in and "su"-user
  $chunk.=  
     $cipher->decrypt(unpack("a8",pack("H16",substr($form{'upass'.$i},16,16))));      ($form{'uname'},$form{'suname'})=split(/\:/,$form{'uname'});
       $form{'uname'} = &LONCAPA::clean_username($form{'uname'});
  $chunk=substr($chunk,1,ord(substr($chunk,0,1)));      $form{'suname'}= &LONCAPA::clean_username($form{'suname'});
  $upass.=$chunk;      $form{'udom'}  = &LONCAPA::clean_domain(  $form{'udom'});
     }  
       my $role   = $r->dir_config('lonRole');
 # ---------------------------------------------------------------- Authenticate      my $domain = $r->dir_config('lonDefDomain');
     my @cancreate;      my $prodir = $r->dir_config('lonUsersDir');
     my %domconfig = &Apache::lonnet::get_dom('configuration',['usercreation'],$form{'udom'});      my $contact_name = &mt('LON-CAPA helpdesk');
     if (ref($domconfig{'usercreation'}) eq 'HASH') {  
         if (ref($domconfig{'usercreation'}{'cancreate'}) eq 'HASH') {  # ---------------------------------------- Get the information from login token
             if (ref($domconfig{'usercreation'}{'cancreate'}{'selfcreate'}) eq 'ARRAY') {  
                 @cancreate = @{$domconfig{'usercreation'}{'cancreate'}{'selfcreate'}};      my $tmpinfo=Apache::lonnet::reply('tmpget:'.$form{'logtoken'},
             } elsif (($domconfig{'usercreation'}{'cancreate'}{'selfcreate'} ne 'none') &&                                         $form{'serverid'});
                      ($domconfig{'usercreation'}{'cancreate'}{'selfcreate'} ne '')) {  
                 @cancreate = ($domconfig{'usercreation'}{'cancreate'}{'selfcreate'});      if (($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);
     }          return OK;
     my $defaultauth;      } else {
     if (grep(/^login$/,@cancreate)) {   my $reply = &Apache::lonnet::reply('tmpdel:'.$form{'logtoken'},
         $defaultauth = 1;     $form{'serverid'});
     }          if ( $reply ne 'ok' ) {
     my $clientcancheckhost = 1;              &failed($r,'Session could not be opened.',\%form);
     my $authhost=Apache::lonnet::authenticate($form{'uname'},$upass,      &Apache::lonnet::logthis("ERROR got a reply of $reply when trying to contact ". $form{'serverid'}." to get login token");
                                               $form{'udom'},$defaultauth,      return OK;
                                               $clientcancheckhost);   }
           }
 # --------------------------------------------------------------------- Failed?  
       if (!&Apache::lonnet::domain($form{'udom'})) {
     if ($authhost eq 'no_host') {          &failed($r,'The domain you provided is not a valid LON-CAPA domain.',\%form);
  &failed($r,'Username and/or password could not be authenticated.',          return OK;
  \%form);      }
         return OK;  
     } elsif ($authhost eq 'no_account_on_host') {      my ($key,$firsturl,$rolestr,$symbstr,$iptokenstr)=split(/&/,$tmpinfo);
         my %domconfig =       if ($rolestr) {
             &Apache::lonnet::get_dom('configuration',['usercreation'],$form{'udom'});          $rolestr = &unescape($rolestr);
         if (grep(/^login$/,@cancreate)) {      }
             my $domdesc = &Apache::lonnet::domain($form{'udom'},'description');      if ($symbstr) {
             &check_can_host($r,\%form,'no_account_on_host',$domdesc);          $symbstr= &unescape($symbstr);
             my $start_page =       }
                 &Apache::loncommon::start_page('Create a user account in LON-CAPA');      if ($iptokenstr) {
             my $lonhost = $r->dir_config('lonHostID');          $iptokenstr = &unescape($iptokenstr);
             my $origmail = $Apache::lonnet::perlvar{'lonSupportEMail'};      }
             my $contacts =       if ($rolestr =~ /^role=/) {
                 &Apache::loncommon::build_recipient_list(undef,'helpdeskmail',          (undef,$form{'role'}) = split('=',$rolestr);
                                                         $form{'udom'},$origmail);      }
             my ($contact_email) = split(',',$contacts);       if ($symbstr =~ /^symb=/) {
             my $output = &Apache::createaccount::username_check($form{'uname'},           (undef,$form{'symb'}) = split('=',$symbstr);
                                                                 $form{'udom'},$domdesc,'',      }
                                                                 $lonhost,$contact_email,$contact_name);      if ($iptokenstr =~ /^iptoken=/) {
             &Apache::loncommon::content_type($r,'text/html');          (undef,$form{'iptoken'}) = split('=',$iptokenstr);
             $r->send_http_header;      }
             &Apache::createaccount::print_header($r,$start_page);  
             $r->print('<h3>'.&mt('Account creation').'</h3>'.      my $upass = $ENV{HTTPS} ? $form{'upass0'}
                       &mt('Although your username and password were authenticated, you do not currently have a LON-CAPA account at this institution.').'<br />'.          : &Apache::loncommon::des_decrypt($key,$form{'upass0'});
                       $output.&Apache::loncommon::end_page());  
             return OK;  # ---------------------------------------------------------------- Authenticate
         } else {  
             &failed($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);      my %domconfig = &Apache::lonnet::get_dom('configuration',['usercreation'],$form{'udom'});
             return OK;      my ($cancreate,$statustocreate) =
         }          &Apache::createaccount::get_creation_controls($form{'udom'},$domconfig{'usercreation'});
     }      my $defaultauth;
       if (ref($cancreate) eq 'ARRAY') {
     if (($firsturl eq '') ||           if (grep(/^login$/,@{$cancreate})) {
  ($firsturl=~/^\/adm\/(logout|remote)/)) {              $defaultauth = 1;
  $firsturl='/adm/roles';          }
     }      }
 # --------------------------------- Are we attempting to login as somebody else?      my $clientcancheckhost = 1;
     if ($form{'suname'}) {      my $authhost=Apache::lonnet::authenticate($form{'uname'},$upass,
 # ------------ see if the original user has enough privileges to pull this stunt                                                $form{'udom'},$defaultauth,
  if (&Apache::lonnet::privileged($form{'uname'},$form{'udom'})) {                                                $clientcancheckhost);
 # ---------------------------------------------------- see if the su-user exists     
     unless (&Apache::lonnet::homeserver($form{'suname'},$form{'udom'})  # --------------------------------------------------------------------- Failed?
  eq 'no_host') {  
  &Apache::lonnet::logthis(&Apache::lonnet::homeserver($form{'suname'},$form{'udom'}));      if ($authhost eq 'no_host') {
 # ------------------------------ see if the su-user is not too highly privileged   &failed($r,'Username and/or password could not be authenticated.',
  unless (&Apache::lonnet::privileged($form{'suname'},$form{'udom'})) {   \%form);
 # -------------------------------------------------------- actually switch users          return OK;
     &Apache::lonnet::logperm('User '.$form{'uname'}.' at '.$form{'udom'}.      } elsif ($authhost eq 'no_account_on_host') {
  ' logging in as '.$form{'suname'});          if ($defaultauth) {
     $form{'uname'}=$form{'suname'};              my $domdesc = &Apache::lonnet::domain($form{'udom'},'description');
  } else {              unless (&check_can_host($r,\%form,'no_account_on_host',$domdesc)) {
     &Apache::lonnet::logthis('Attempted switch user to privileged user');                  return OK;
  }              }
     }              my $start_page =
  } else {                  &Apache::loncommon::start_page('Create a user account in LON-CAPA');
     &Apache::lonnet::logthis('Non-privileged user attempting switch user');              my $lonhost = $r->dir_config('lonHostID');
  }              my $origmail = $Apache::lonnet::perlvar{'lonSupportEMail'};
     }              my $contacts =
                   &Apache::loncommon::build_recipient_list(undef,'helpdeskmail',
     &check_can_host($r,\%form,$authhost);                                                          $form{'udom'},$origmail);
               my ($contact_email) = split(',',$contacts);
     if ($r->dir_config("lonBalancer") eq 'yes') {              my $output =
  &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef,                  &Apache::createaccount::username_check($form{'uname'},$form{'udom'},
  \%form);                                                         $domdesc,'',$lonhost,
         my ($otherserver) = &Apache::lonnet::choose_server($form{'udom'});                                                         $contact_email,$contact_name,
  $r->internal_redirect('/adm/switchserver?otherserver='.$otherserver);                                                         undef,$statustocreate);
     } else {              &Apache::loncommon::content_type($r,'text/html');
  &success($r,$form{'uname'},$form{'udom'},$authhost,$firsturl,undef,              $r->send_http_header;
  \%form);              &Apache::createaccount::print_header($r,$start_page);
     }              $r->print('<h3>'.&mt('Account creation').'</h3>'.
     return OK;                        &mt('Although your username and password were authenticated, you do not currently have a LON-CAPA account at this institution.').'<br />'.
 }                        $output.&Apache::loncommon::end_page());
               return OK;
 sub check_can_host {          } else {
     my ($r,$form,$authhost,$domdesc) = @_;              &failed($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);
     return unless (ref($form) eq 'HASH');              return OK;
     my $canhost = 1;          }
     my $lonhost = $r->dir_config('lonHostID');      }
     my $udom = $form->{'udom'};  
     my @intdoms = &Apache::lonnet::get_internet_names($lonhost);      if (($firsturl eq '') ||
     my $uprimary_id = &Apache::lonnet::domain($udom,'primary');   ($firsturl=~/^\/adm\/(logout|remote)/)) {
     my $uint_dom = &Apache::lonnet::internet_dom($uprimary_id);   $firsturl='/adm/roles';
     unless ($uint_dom ne '' && grep(/^\Q$uint_dom\E$/,@intdoms)) {      }
         my $machine_dom = &Apache::lonnet::host_domain($lonhost);  
         my $hostname = &Apache::lonnet::hostname($lonhost);      my $hosthere;
         my $serverhomeID = &Apache::lonnet::get_server_homeID($hostname);      if ($form{'iptoken'}) {
         my $serverhomedom = &Apache::lonnet::host_domain($serverhomeID);          my %sessiondata = &Apache::lonnet::tmpget($form{'iptoken'});
         my %defdomdefaults = &Apache::lonnet::get_domain_defaults($serverhomedom);          my $delete = &Apache::lonnet::tmpdel($form{'iptoken'});
         my %udomdefaults = &Apache::lonnet::get_domain_defaults($udom);          if (($sessiondata{'domain'} eq $form{'udom'}) &&
         my $loncaparev;              ($sessiondata{'username'} eq $form{'uname'})) {
         if ($authhost eq 'no_account_on_host') {              $hosthere = 1;
             $loncaparev = &Apache::lonnet::get_server_loncaparev($machine_dom);          }
         } else {      }
             $loncaparev = &Apache::lonnet::get_server_loncaparev($machine_dom,$lonhost);  
         }  # --------------------------------- Are we attempting to login as somebody else?
         $canhost = &Apache::lonnet::can_host_session($udom,$lonhost,$loncaparev,      if ($form{'suname'}) {
                                                      $udomdefaults{'remotesessions'},  # ------------ see if the original user has enough privileges to pull this stunt
                                                      $defdomdefaults{'hostedsessions'});   if (&Apache::lonnet::privileged($form{'uname'},$form{'udom'})) {
     }  # ---------------------------------------------------- see if the su-user exists
     unless ($canhost) {      unless (&Apache::lonnet::homeserver($form{'suname'},$form{'udom'})
         if ($authhost eq 'no_account_on_host') {   eq 'no_host') {
             my ($login_host,$hostname) = &Apache::lonnet::choose_server($udom);   &Apache::lonnet::logthis(&Apache::lonnet::homeserver($form{'suname'},$form{'udom'}));
             &Apache::loncommon::content_type($r,'text/html');  # ------------------------------ see if the su-user is not too highly privileged
             $r->send_http_header;   unless (&Apache::lonnet::privileged($form{'suname'},$form{'udom'})) {
             if ($login_host ne '') {  # -------------------------------------------------------- actually switch users
                 my $protocol = $Apache::lonnet::protocol{$login_host};      &Apache::lonnet::logperm('User '.$form{'uname'}.' at '.$form{'udom'}.
                 $protocol = 'http' if ($protocol ne 'https');   ' logging in as '.$form{'suname'});
                 my $newurl = $protocol.'://'.$hostname.'/adm/createaccount';      $form{'uname'}=$form{'suname'};
                 $r->print(&Apache::loncommon::start_page('Create a user account in LON-CAPA').   } else {
                           '<h3>'.&mt('Account creation').'</h3>'.      &Apache::lonnet::logthis('Attempted switch user to privileged user');
                           &mt('You do not currently have a LON-CAPA account at this institution.').'<br />'.   }
                           '<p>'.&mt('You will be able to create one by logging into a LON-CAPA server within the [_1] domain.',$domdesc).'</p>'.      }
                           '<p>'.&mt('[_1]Log in[_2]','<a href="'.$newurl.'">','</a>').   } else {
                           &Apache::loncommon::end_page());      &Apache::lonnet::logthis('Non-privileged user attempting switch user');
             } else {   }
                 $r->print(&Apache::loncommon::start_page('Access to LON-CAPA unavailable').      }
                           '<h3>'.&mt('Account creation unavailable').'</h3>'.  
                           &mt('You do not currently have a LON-CAPA account at this institution.').'<br />'.      my ($is_balancer,$otherserver);
                           '<p>'.&mt('Currently a LON-CAPA server is not available within the [_1] domain for you to log-in to, to create an account.',$domdesc).'</p>'.  
                           &Apache::loncommon::end_page());      unless ($hosthere) {
             }          ($is_balancer,$otherserver) =
             return OK;              &Apache::lonnet::check_loadbalancing($form{'uname'},$form{'udom'},'login');
         } else {          if ($is_balancer) {
             &success($r,$form->{'uname'},$udom,$authhost,'noredirect',undef,              if ($otherserver eq '') {
                      $form);                  my $lowest_load;
             my ($otherserver) = &Apache::lonnet::choose_server($udom);                  ($otherserver,undef,undef,undef,$lowest_load) = &Apache::lonnet::choose_server($form{'udom'});
             $r->internal_redirect('/adm/switchserver?otherserver='.$otherserver);                  if ($lowest_load > 100) {
         }                      $otherserver = &Apache::lonnet::spareserver($lowest_load,$lowest_load,1,$form{'udom'});
     }                  }
 }              }
               if ($otherserver ne '') {
 1;                  my @hosts = &Apache::lonnet::current_machine_ids();
 __END__                  if (grep(/^\Q$otherserver\E$/,@hosts)) {
                       $hosthere = $otherserver;
                   }
               }
           }
       }
   
       if (($is_balancer) && (!$hosthere)) {
           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='.$firsturl);
                   return OK;
               }
           }
           if (($is_balancer) && ($hosthere)) {
               $form{'noloadbalance'} = $hosthere;
           }
           &success($r,$form{'uname'},$form{'udom'},$authhost,$firsturl,undef,
                    \%form);
           return OK;
       }
   }
   
   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.1.107  
changed lines
  Added in v.1.141

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