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Diff for /loncom/auth/lonauth.pm between versions 1.122 and 1.142

version 1.122, 2012/08/27 00:52:45 version 1.142, 2017/02/17 14:34:21
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 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=/; HttpOnly";
 # -------------------------------------------------------- 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|uploaded|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::lonhtmlcommon::scripttag('self.name="loncapaclient";');      my $brcrum = [{'href' => '',
     my $header = '<meta HTTP-EQUIV="Refresh" CONTENT="0; url='.$destination.'" />';                     'text' => 'Successful Login'},];
     my $brcrum = [{'href' => '',      my $args = {'bread_crumbs' => $brcrum,};
                    'text' => 'Successful Login'},];      unless ((defined($form->{role})) || (defined($form->{symb}))) {
     my $start_page=&Apache::loncommon::start_page('Successful Login',          my $update=$env{'user.update.time'};
                                                   $header,          if (!$update) {
                                                   {'bread_crumbs' => $brcrum,});              $update = $env{'user.login.time'};
     my $end_page  =&Apache::loncommon::end_page();          }
           my %roles_in_env;
  my $continuelink='<a href="'.$destination.'">'.&mt('Continue').'</a>';          my $showcount = &Apache::lonroles::roles_from_env(\%roles_in_env,$update);
 # ------------------------------------------------- Output for successful login          if ($showcount == 1) {
               foreach my $rolecode (keys(%roles_in_env)) {
     &Apache::loncommon::content_type($r,'text/html');                  my ($cid) = ($rolecode =~ m{^\Quser.role.st./\E($match_domain/$match_courseid)(?:/|$)});
     $r->header_out('Set-cookie' => $cookie);                  if ($cid) {
     $r->send_http_header;                      my %coursedescription =
                           &Apache::lonnet::coursedescription($cid,{'one_time' => '1'});
     my %lt=&Apache::lonlocal::texthash(                      if ($coursedescription{'type'} eq 'Placement') {
        'wel' => 'Welcome',                          $args->{'crstype'} = 'Placement';
        'pro' => 'Login problems?',                      }
        );                      last;
     my $loginhelp = &loginhelpdisplay($domain);                  }
     if ($loginhelp) {              }
         $loginhelp = '<p><a href="'.$loginhelp.'">'.$lt{'pro'}.'</a></p>';          }
     }      }
       my $start_page=&Apache::loncommon::start_page('Successful Login',
     my $welcome = &mt('Welcome to the Learning[_1]Online[_2] Network with CAPA. Please wait while your session is being set up.','<i>','</i>');                                                     $header,$args);
     $r->print(<<ENDSUCCESS);      my $end_page  =&Apache::loncommon::end_page();
 $start_page  
 $windowinfo   my $continuelink='<a href="'.$destination.'">'.&mt('Continue').'</a>';
 <h1>$lt{'wel'}</h1>  # ------------------------------------------------- Output for successful login
 $welcome  
 $loginhelp      &Apache::loncommon::content_type($r,'text/html');
 $continuelink      $r->header_out('Set-cookie' => $cookie);
 $end_page      $r->send_http_header;
 ENDSUCCESS  
 }      my %lt=&Apache::lonlocal::texthash(
          'wel' => 'Welcome',
 # --------------------------------------------------------------- Failed login!         'pro' => 'Login problems?',
          );
 sub failed {      my $loginhelp = &loginhelpdisplay($domain);
     my ($r,$message,$form) = @_;      if ($loginhelp) {
     my $start_page = &Apache::loncommon::start_page('Unsuccessful Login',undef);          $loginhelp = '<p><a href="'.$loginhelp.'">'.$lt{'pro'}.'</a></p>';
     my $retry = '/adm/login?username='.$form->{'uname'}.      }
                 '&domain='.$form->{'udom'};  
     if (exists($form->{role})) {      my $welcome = &mt('Welcome to the Learning[_1]Online[_2] Network with CAPA. Please wait while your session is being set up.','<i>','</i>');
         $retry .= '&role='.$form->{role};      $r->print(<<ENDSUCCESS);
     }  $start_page
     if (exists($form->{symb})) {  $windowinfo
         $retry .= '&symb='.$form->{symb};  <h1>$lt{'wel'}</h1>
     }  $welcome
     my $end_page   = &Apache::loncommon::end_page();  $loginhelp
     &Apache::loncommon::content_type($r,'text/html');  $continuelink
     $r->send_http_header;  $end_page
     $r->print(  ENDSUCCESS
        $start_page      return;
       .'<h1>'.&mt('Sorry ...').'</h1>'  }
       .'<p class="LC_warning">'.&mt($message).'</p>'  
       .'<p>'.&mt('Please [_1]log in again[_2].','<a href="'.$retry.'">','</a>')  # --------------------------------------------------------------- Failed login!
       .'</p>'  
       .'<p><a href="/adm/loginproblems.html">'.&mt('Login problems?').'</a></p>'  sub failed {
       .$end_page      my ($r,$message,$form) = @_;
     );      (undef,undef,undef,my $clientmathml,my $clientunicode) =
  }          &Apache::loncommon::decode_user_agent();
       my $args = {};
 # ------------------------------------------------------------------ Rerouting!      if ($clientunicode && !$clientmathml) {
           $args = {'browser.unicode' => 1};
 sub reroute {      }
     my ($r) = @_;  
     &Apache::loncommon::content_type($r,'text/html');      my $start_page = &Apache::loncommon::start_page('Unsuccessful Login',undef,$args);
     $r->send_http_header;      my $uname = &Apache::loncommon::cleanup_html($form->{'uname'});
     my $msg='<h1>'.&mt('Sorry ...').'</h1>'      my $udom = &Apache::loncommon::cleanup_html($form->{'udom'});
            .&mt('Please [_1]log in again[_2].');      if (&Apache::lonnet::domain($udom,'description') eq '') {
     &Apache::loncommon::simple_error_page($r,'Rerouting',$msg);          undef($udom);
 }      }
       my $retry = '/adm/login';
 # ---------------------------------------------------------------- Main handler      if ($uname eq $form->{'uname'}) {
           $retry .= '?username='.$uname;
 sub handler {      }
     my $r = shift;      if ($udom) {
     my $londocroot = $r->dir_config('lonDocRoot');          $retry .= (($retry=~/\?/)?'&amp;':'?').'domain='.$udom;
     my $form;      }
 # Are we re-routing?      if (exists($form->{role})) {
     if (-e "$londocroot/lon-status/reroute.txt") {          my $role = &Apache::loncommon::cleanup_html($form->{role});
  &reroute($r);          if ($role ne '') {
  return OK;              $retry .= (($retry=~/\?/)?'&amp;':'?').'role='.$role;
     }          }
       }
     &Apache::lonlocal::get_language_handle($r);      if (exists($form->{symb})) {
           my $symb = &Apache::loncommon::cleanup_html($form->{symb});
 # -------------------------------- Prevent users from attempting to login twice          if ($symb ne '') {
     my $handle = &Apache::lonnet::check_for_valid_session($r);              $retry .= (($retry=~/\?/)?'&amp;':'?').'symb='.$symb;
     if ($handle ne '') {          }
         my $lonidsdir=$r->dir_config('lonIDsDir');      }
         if ($handle=~/^publicuser\_/) {      my $end_page = &Apache::loncommon::end_page();
 # For "public user" - remove it, we apparently really want to login      &Apache::loncommon::content_type($r,'text/html');
             unlink($r->dir_config('lonIDsDir')."/$handle.id");      $r->send_http_header;
         } else {      my @actions =
 # Indeed, a valid token is found           (&mt('Please [_1]log in again[_2].','<a href="'.$retry.'">','</a>'));
             &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);      my $loginhelp = &loginhelpdisplay($udom);
     &Apache::loncommon::content_type($r,'text/html');      if ($loginhelp) {
     $r->send_http_header;          push(@actions, '<a href="'.$loginhelp.'">'.&mt('Login problems?').'</a>');
     my $start_page =       }
         &Apache::loncommon::start_page('Already logged in');      #FIXME: link to helpdesk might be added here
     my $end_page =   
         &Apache::loncommon::end_page();      $r->print(
             my $dest = '/adm/roles';         $start_page
             if ($env{'form.firsturl'} ne '') {        .'<h2>'.&mt('Sorry ...').'</h2>'
                 $dest = $env{'form.firsturl'};        .&Apache::lonhtmlcommon::confirm_success(&mt($message),1).'<br /><br />'
             }        .&Apache::lonhtmlcommon::actionbox(\@actions)
             $r->print(        .$end_page
                $start_page      );
               .'<p class="LC_warning>"'.&mt('You are already logged in!').'</p>'   }
               .'<p>'.&mt('Please either [_1]continue the current session[_2] or [_3]log out[_4].'  
                     ,'<a href="'.$dest.'">','</a>','<a href="/adm/logout">','</a>')  # ------------------------------------------------------------------ Rerouting!
               .'</p>'  
               .$end_page  sub reroute {
             );      my ($r) = @_;
             return OK;      &Apache::loncommon::content_type($r,'text/html');
         }      $r->send_http_header;
     }      my $msg='<b>'.&mt('Sorry ...').'</b><br />'
              .&mt('Please [_1]log in again[_2].');
 # ---------------------------------------------------- No valid token, continue      &Apache::loncommon::simple_error_page($r,'Rerouting',$msg,{'no_auto_mt_msg' => 1});
   }
   
     my $buffer;  # ---------------------------------------------------------------- Main handler
     if ($r->header_in('Content-length') > 0) {  
  $r->read($buffer,$r->header_in('Content-length'),0);  sub handler {
     }      my $r = shift;
     my %form;      my $londocroot = $r->dir_config('lonDocRoot');
     foreach my $pair (split(/&/,$buffer)) {  # Are we re-routing?
        my ($name,$value) = split(/=/,$pair);      if (-e "$londocroot/lon-status/reroute.txt") {
        $value =~ tr/+/ /;   &reroute($r);
        $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;   return OK;
        $form{$name}=$value;      }
     }   
       &Apache::lonlocal::get_language_handle($r);
     if ((!$form{'uname'}) || (!$form{'upass0'}) || (!$form{'udom'})) {  
  &failed($r,'Username, password and domain need to be specified.',  # -------------------------------- Prevent users from attempting to login twice
  \%form);      my $handle = &Apache::lonnet::check_for_valid_session($r);
         return OK;      if ($handle ne '') {
     }          my $lonidsdir=$r->dir_config('lonIDsDir');
           if ($handle=~/^publicuser\_/) {
 # split user logging in and "su"-user  # For "public user" - remove it, we apparently really want to login
               unlink($r->dir_config('lonIDsDir')."/$handle.id");
     ($form{'uname'},$form{'suname'})=split(/\:/,$form{'uname'});          } else {
     $form{'uname'} = &LONCAPA::clean_username($form{'uname'});  # Indeed, a valid token is found
     $form{'suname'}= &LONCAPA::clean_username($form{'suname'});              &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);
     $form{'udom'}  = &LONCAPA::clean_domain(  $form{'udom'});      &Apache::loncommon::content_type($r,'text/html');
       $r->send_http_header;
     my $role   = $r->dir_config('lonRole');      my $start_page =
     my $domain = $r->dir_config('lonDefDomain');          &Apache::loncommon::start_page('Already logged in');
     my $prodir = $r->dir_config('lonUsersDir');      my $end_page =
     my $contact_name = &mt('LON-CAPA helpdesk');          &Apache::loncommon::end_page();
               my $dest = '/adm/roles';
 # ---------------------------------------- Get the information from login token              if ($env{'form.firsturl'} ne '') {
                   $dest = $env{'form.firsturl'};
     my $tmpinfo=Apache::lonnet::reply('tmpget:'.$form{'logtoken'},              }
                                       $form{'serverid'});              $r->print(
                  $start_page
     if (($tmpinfo=~/^error/) || ($tmpinfo eq 'con_lost') ||                 .'<p class="LC_warning">'.&mt('You are already logged in!').'</p>'
         ($tmpinfo eq 'no_such_host')) {                .'<p>'.&mt('Please either [_1]continue the current session[_2] or [_3]log out[_4].'
  &failed($r,'Information needed to verify your login information is missing, inaccessible or expired.',\%form);                      ,'<a href="'.$dest.'">','</a>','<a href="/adm/logout">','</a>')
         return OK;                .'</p>'
     } else {                .$end_page
  my $reply = &Apache::lonnet::reply('tmpdel:'.$form{'logtoken'},              );
    $form{'serverid'});              return OK;
         if ( $reply ne 'ok' ) {          }
             &failed($r,'Session could not be opened.',\%form);      }
     &Apache::lonnet::logthis("ERROR got a reply of $reply when trying to contact ". $form{'serverid'}." to get login token");  
     return OK;  # ---------------------------------------------------- No valid token, continue
  }  
     }  
       my $buffer;
     if (!&Apache::lonnet::domain($form{'udom'})) {      if ($r->header_in('Content-length') > 0) {
         &failed($r,'The domain you provided is not a valid LON-CAPA domain.',\%form);   $r->read($buffer,$r->header_in('Content-length'),0);
         return OK;      }
     }      my %form;
       foreach my $pair (split(/&/,$buffer)) {
     my ($key,$firsturl,$rolestr,$symbstr)=split(/&/,$tmpinfo);         my ($name,$value) = split(/=/,$pair);
     if ($rolestr) {         $value =~ tr/+/ /;
         $rolestr = &unescape($rolestr);         $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
     }         $form{$name}=$value;
     if ($symbstr) {      }
         $symbstr= &unescape($symbstr);  
     }      if ((!$form{'uname'}) || (!$form{'upass0'}) || (!$form{'udom'})) {
     if ($rolestr =~ /^role=/) {   &failed($r,'Username, password and domain need to be specified.',
         (undef,$form{'role'}) = split('=',$rolestr);   \%form);
     }          return OK;
     if ($symbstr =~ /^symb=/) {       }
         (undef,$form{'symb'}) = split('=',$symbstr);  
     }  # split user logging in and "su"-user
   
     my $keybin=pack("H16",$key);      ($form{'uname'},$form{'suname'})=split(/\:/,$form{'uname'});
       $form{'uname'} = &LONCAPA::clean_username($form{'uname'});
     my $cipher;      $form{'suname'}= &LONCAPA::clean_username($form{'suname'});
     if ($Crypt::DES::VERSION>=2.03) {      $form{'udom'}  = &LONCAPA::clean_domain(  $form{'udom'});
  $cipher=new Crypt::DES $keybin;  
     }      my $role   = $r->dir_config('lonRole');
     else {      my $domain = $r->dir_config('lonDefDomain');
  $cipher=new DES $keybin;      my $prodir = $r->dir_config('lonUsersDir');
     }      my $contact_name = &mt('LON-CAPA helpdesk');
     my $upass='';  
     for (my $i=0;$i<=2;$i++) {  # ---------------------------------------- Get the information from login token
  my $chunk=  
     $cipher->decrypt(unpack("a8",pack("H16",substr($form{'upass'.$i},0,16))));      my $tmpinfo=Apache::lonnet::reply('tmpget:'.$form{'logtoken'},
                                         $form{'serverid'});
  $chunk.=  
     $cipher->decrypt(unpack("a8",pack("H16",substr($form{'upass'.$i},16,16))));      if (($tmpinfo=~/^error/) || ($tmpinfo eq 'con_lost') ||
           ($tmpinfo eq 'no_such_host')) {
  $chunk=substr($chunk,1,ord(substr($chunk,0,1)));   &failed($r,'Information needed to verify your login information is missing, inaccessible or expired.',\%form);
  $upass.=$chunk;          return OK;
     }      } else {
    my $reply = &Apache::lonnet::reply('tmpdel:'.$form{'logtoken'},
 # ---------------------------------------------------------------- Authenticate     $form{'serverid'});
           if ( $reply ne 'ok' ) {
     my %domconfig = &Apache::lonnet::get_dom('configuration',['usercreation'],$form{'udom'});              &failed($r,'Session could not be opened.',\%form);
     my ($cancreate,$statustocreate) =      &Apache::lonnet::logthis("ERROR got a reply of $reply when trying to contact ". $form{'serverid'}." to get login token");
         &Apache::createaccount::get_creation_controls($form{'udom'},$domconfig{'usercreation'});      return OK;
     my $defaultauth;   }
     if (ref($cancreate) eq 'ARRAY') {      }
         if (grep(/^login$/,@{$cancreate})) {  
             $defaultauth = 1;      if (!&Apache::lonnet::domain($form{'udom'})) {
         }          &failed($r,'The domain you provided is not a valid LON-CAPA domain.',\%form);
     }          return OK;
     my $clientcancheckhost = 1;      }
     my $authhost=Apache::lonnet::authenticate($form{'uname'},$upass,  
                                               $form{'udom'},$defaultauth,      my ($key,$firsturl,$rolestr,$symbstr,$iptokenstr)=split(/&/,$tmpinfo);
                                               $clientcancheckhost);      if ($rolestr) {
               $rolestr = &unescape($rolestr);
 # --------------------------------------------------------------------- Failed?      }
       if ($symbstr) {
     if ($authhost eq 'no_host') {          $symbstr= &unescape($symbstr);
  &failed($r,'Username and/or password could not be authenticated.',      }
  \%form);      if ($iptokenstr) {
         return OK;          $iptokenstr = &unescape($iptokenstr);
     } elsif ($authhost eq 'no_account_on_host') {      }
         if ($defaultauth) {      if ($rolestr =~ /^role=/) {
             my $domdesc = &Apache::lonnet::domain($form{'udom'},'description');          (undef,$form{'role'}) = split('=',$rolestr);
             unless (&check_can_host($r,\%form,'no_account_on_host',$domdesc)) {      }
                 return OK;      if ($symbstr =~ /^symb=/) {
             }          (undef,$form{'symb'}) = split('=',$symbstr);
             my $start_page =       }
                 &Apache::loncommon::start_page('Create a user account in LON-CAPA');      if ($iptokenstr =~ /^iptoken=/) {
             my $lonhost = $r->dir_config('lonHostID');          (undef,$form{'iptoken'}) = split('=',$iptokenstr);
             my $origmail = $Apache::lonnet::perlvar{'lonSupportEMail'};      }
             my $contacts =   
                 &Apache::loncommon::build_recipient_list(undef,'helpdeskmail',      my $upass = $ENV{HTTPS} ? $form{'upass0'}
                                                         $form{'udom'},$origmail);          : &Apache::loncommon::des_decrypt($key,$form{'upass0'});
             my ($contact_email) = split(',',$contacts);   
             my $output =   # ---------------------------------------------------------------- Authenticate
                 &Apache::createaccount::username_check($form{'uname'},$form{'udom'},  
                                                        $domdesc,'',$lonhost,      my %domconfig = &Apache::lonnet::get_dom('configuration',['usercreation'],$form{'udom'});
                                                        $contact_email,$contact_name,      my ($cancreate,$statustocreate) =
                                                        undef,$statustocreate);          &Apache::createaccount::get_creation_controls($form{'udom'},$domconfig{'usercreation'});
             &Apache::loncommon::content_type($r,'text/html');      my $defaultauth;
             $r->send_http_header;      if (ref($cancreate) eq 'ARRAY') {
             &Apache::createaccount::print_header($r,$start_page);          if (grep(/^login$/,@{$cancreate})) {
             $r->print('<h3>'.&mt('Account creation').'</h3>'.              $defaultauth = 1;
                       &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;      my $clientcancheckhost = 1;
         } else {      my $authhost=Apache::lonnet::authenticate($form{'uname'},$upass,
             &failed($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);                                                $form{'udom'},$defaultauth,
             return OK;                                                $clientcancheckhost);
         }     
     }  # --------------------------------------------------------------------- Failed?
   
     if (($firsturl eq '') ||       if ($authhost eq 'no_host') {
  ($firsturl=~/^\/adm\/(logout|remote)/)) {   &failed($r,'Username and/or password could not be authenticated.',
  $firsturl='/adm/roles';   \%form);
     }          return OK;
 # --------------------------------- Are we attempting to login as somebody else?      } elsif ($authhost eq 'no_account_on_host') {
     if ($form{'suname'}) {          if ($defaultauth) {
 # ------------ see if the original user has enough privileges to pull this stunt              my $domdesc = &Apache::lonnet::domain($form{'udom'},'description');
  if (&Apache::lonnet::privileged($form{'uname'},$form{'udom'})) {              unless (&check_can_host($r,\%form,'no_account_on_host',$domdesc)) {
 # ---------------------------------------------------- see if the su-user exists                  return OK;
     unless (&Apache::lonnet::homeserver($form{'suname'},$form{'udom'})              }
  eq 'no_host') {              my $start_page =
  &Apache::lonnet::logthis(&Apache::lonnet::homeserver($form{'suname'},$form{'udom'}));                  &Apache::loncommon::start_page('Create a user account in LON-CAPA');
 # ------------------------------ see if the su-user is not too highly privileged              my $lonhost = $r->dir_config('lonHostID');
  unless (&Apache::lonnet::privileged($form{'suname'},$form{'udom'})) {              my $origmail = $Apache::lonnet::perlvar{'lonSupportEMail'};
 # -------------------------------------------------------- actually switch users              my $contacts =
     &Apache::lonnet::logperm('User '.$form{'uname'}.' at '.$form{'udom'}.                  &Apache::loncommon::build_recipient_list(undef,'helpdeskmail',
  ' logging in as '.$form{'suname'});                                                          $form{'udom'},$origmail);
     $form{'uname'}=$form{'suname'};              my ($contact_email) = split(',',$contacts);
  } else {              my $output =
     &Apache::lonnet::logthis('Attempted switch user to privileged user');                  &Apache::createaccount::username_check($form{'uname'},$form{'udom'},
  }                                                         $domdesc,'',$lonhost,
     }                                                         $contact_email,$contact_name,
  } else {                                                         undef,$statustocreate);
     &Apache::lonnet::logthis('Non-privileged user attempting switch user');              &Apache::loncommon::content_type($r,'text/html');
  }              $r->send_http_header;
     }              &Apache::createaccount::print_header($r,$start_page);
               $r->print('<h3>'.&mt('Account creation').'</h3>'.
     my ($is_balancer,$otherserver) =                         &mt('Although your username and password were authenticated, you do not currently have a LON-CAPA account at this institution.').'<br />'.
         &Apache::lonnet::check_loadbalancing($form{'uname'},$form{'udom'});                        $output.&Apache::loncommon::end_page());
               return OK;
     if ($is_balancer) {          } else {
         if (!$otherserver) {               &failed($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);
             ($otherserver) = &Apache::lonnet::choose_server($form{'udom'});              return OK;
         }          }
         if ($otherserver) {      }
             &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef,  
                      \%form);      if (($firsturl eq '') ||
     $r->internal_redirect('/adm/switchserver?otherserver='.$otherserver.'&origurl='.$firsturl);   ($firsturl=~/^\/adm\/(logout|remote)/)) {
         } else {   $firsturl='/adm/roles';
             $r->print(&noswitch());      }
         }  
         return OK;      my $hosthere;
     } else {      if ($form{'iptoken'}) {
         if (!&check_can_host($r,\%form,$authhost)) {          my %sessiondata = &Apache::lonnet::tmpget($form{'iptoken'});
             my ($otherserver) = &Apache::lonnet::choose_server($form{'udom'});          my $delete = &Apache::lonnet::tmpdel($form{'iptoken'});
             if ($otherserver) {          if (($sessiondata{'domain'} eq $form{'udom'}) &&
                 &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef,              ($sessiondata{'username'} eq $form{'uname'})) {
                          \%form);              $hosthere = 1;
                 $r->internal_redirect('/adm/switchserver?otherserver='.$otherserver.'&origurl='.$firsturl);          }
             } else {      }
                 $r->print(&noswitch());  
             }  # --------------------------------- Are we attempting to login as somebody else?
             return OK;      if ($form{'suname'}) {
         }  # ------------ see if the original user has enough privileges to pull this stunt
    if (&Apache::lonnet::privileged($form{'uname'},$form{'udom'})) {
 # ------------------------------------------------------- Do the load balancing  # ---------------------------------------------------- see if the su-user exists
       unless (&Apache::lonnet::homeserver($form{'suname'},$form{'udom'})
 # ---------------------------------------------------------- Determine own load   eq 'no_host') {
         my $loadlim = $r->dir_config('lonLoadLim');   &Apache::lonnet::logthis(&Apache::lonnet::homeserver($form{'suname'},$form{'udom'}));
         my $loadavg;  # ------------------------------ see if the su-user is not too highly privileged
         {   unless (&Apache::lonnet::privileged($form{'suname'},$form{'udom'})) {
             my $loadfile=Apache::File->new('/proc/loadavg');  # -------------------------------------------------------- actually switch users
             $loadavg=<$loadfile>;      &Apache::lonnet::logperm('User '.$form{'uname'}.' at '.$form{'udom'}.
         }   ' logging in as '.$form{'suname'});
         $loadavg =~ s/\s.*//g;      $form{'uname'}=$form{'suname'};
         my $loadpercent=sprintf("%.1f",100*$loadavg/$loadlim);   } else {
         my $userloadpercent=&Apache::lonnet::userload();      &Apache::lonnet::logthis('Attempted switch user to privileged user');
    }
 # ---------------------------------------------------------- Are we overloaded?      }
         if ((($userloadpercent>100.0)||($loadpercent>100.0))) {   } else {
             my $unloaded=Apache::lonnet::spareserver($loadpercent,$userloadpercent,1,$form{'udom'});      &Apache::lonnet::logthis('Non-privileged user attempting switch user');
             if (!$unloaded) {   }
                 ($unloaded) = &Apache::lonnet::choose_server($form{'udom'});      }
             }  
             if ($unloaded) {      my ($is_balancer,$otherserver);
                 &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',  
                          undef,\%form);      unless ($hosthere) {
                 $r->internal_redirect('/adm/switchserver?otherserver='.$unloaded.'&origurl='.$firsturl);          ($is_balancer,$otherserver) =
                 return OK;              &Apache::lonnet::check_loadbalancing($form{'uname'},$form{'udom'},'login');
             }          if ($is_balancer) {
         }              if ($otherserver eq '') {
         &success($r,$form{'uname'},$form{'udom'},$authhost,$firsturl,undef,                  my $lowest_load;
                  \%form);                  ($otherserver,undef,undef,undef,$lowest_load) = &Apache::lonnet::choose_server($form{'udom'});
         return OK;                  if ($lowest_load > 100) {
     }                      $otherserver = &Apache::lonnet::spareserver($lowest_load,$lowest_load,1,$form{'udom'});
 }                  }
               }
 sub check_can_host {              if ($otherserver ne '') {
     my ($r,$form,$authhost,$domdesc) = @_;                  my @hosts = &Apache::lonnet::current_machine_ids();
     return unless (ref($form) eq 'HASH');                  if (grep(/^\Q$otherserver\E$/,@hosts)) {
     my $canhost = 1;                      $hosthere = $otherserver;
     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};      if (($is_balancer) && (!$hosthere)) {
     }          if ($otherserver) {
     my $uprimary_id = &Apache::lonnet::domain($udom,'primary');              &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef,
     my $uint_dom = &Apache::lonnet::internet_dom($uprimary_id);                       \%form);
     unless ($uint_dom ne '' && grep(/^\Q$uint_dom\E$/,@intdoms)) {              my $switchto = '/adm/switchserver?otherserver='.$otherserver;
         my $machine_dom = &Apache::lonnet::host_domain($lonhost);              if (($firsturl) && ($firsturl ne '/adm/switchserver') && ($firsturl ne '/adm/roles')) {
         my $hostname = &Apache::lonnet::hostname($lonhost);                  $switchto .= '&origurl='.$firsturl;
         my $serverhomeID = &Apache::lonnet::get_server_homeID($hostname);              }
         my $serverhomedom = &Apache::lonnet::host_domain($serverhomeID);              if ($form{'role'}) {
         my %defdomdefaults = &Apache::lonnet::get_domain_defaults($serverhomedom);                  $switchto .= '&role='.$form{'role'};
         my %udomdefaults = &Apache::lonnet::get_domain_defaults($udom);              }
         my $loncaparev;              if ($form{'symb'}) {
         if ($authhost eq 'no_account_on_host') {                  $switchto .= '&symb='.$form{'symb'};
             $loncaparev = &Apache::lonnet::get_server_loncaparev($machine_dom);              }
         } else {              $r->internal_redirect($switchto);
             $loncaparev = &Apache::lonnet::get_server_loncaparev($machine_dom,$lonhost);          } else {
         }              $r->print(&noswitch());
         $canhost = &Apache::lonnet::can_host_session($udom,$lonhost,$loncaparev,          }
                                                      $udomdefaults{'remotesessions'},          return OK;
                                                      $defdomdefaults{'hostedsessions'});      } else {
     }          if (!&check_can_host($r,\%form,$authhost)) {
     unless ($canhost) {              my ($otherserver) = &Apache::lonnet::choose_server($form{'udom'});
         if ($authhost eq 'no_account_on_host') {              if ($otherserver) {
             my $checkloginvia = 1;                  &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef,
             my ($login_host,$hostname) =                            \%form);
                 &Apache::lonnet::choose_server($udom,$checkloginvia);                  my $switchto = '/adm/switchserver?otherserver='.$otherserver;
             &Apache::loncommon::content_type($r,'text/html');                  if (($firsturl) && ($firsturl ne '/adm/switchserver') && ($firsturl ne '/adm/roles')) {
             $r->send_http_header;                      $switchto .= '&origurl='.$firsturl;
             if ($login_host ne '') {                  }
                 my $protocol = $Apache::lonnet::protocol{$login_host};                  if ($form{'role'}) {
                 $protocol = 'http' if ($protocol ne 'https');                      $switchto .= '&role='.$form{'role'};
                 my $newurl = $protocol.'://'.$hostname.'/adm/createaccount';                  }
                 $r->print(&Apache::loncommon::start_page('Create a user account in LON-CAPA').                  if ($form{'symb'}) {
                           '<h3>'.&mt('Account creation').'</h3>'.                      $switchto .= '&symb='.$form{'symb'};
                           &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>'.                  $r->internal_redirect($switchto);
                           '<p>'.&mt('[_1]Log in[_2]','<a href="'.$newurl.'">','</a>').              } else {
                           &Apache::loncommon::end_page());                  $r->print(&noswitch());
             } else {              }
                 $r->print(&Apache::loncommon::start_page('Access to LON-CAPA unavailable').              return OK;
                           '<h3>'.&mt('Account creation unavailable').'</h3>'.          }
                           &mt('You do not currently have a LON-CAPA account at this institution.').'<br />'.  
                           '<p>'.&mt('Currently a LON-CAPA server is not available within the [_1] domain for you to log-in to, to create an account.',$domdesc).'</p>'.  # ------------------------------------------------------- Do the load balancing
                           &Apache::loncommon::end_page());  
             }  # ---------------------------------------------------------- Determine own load
         } else {          my $loadlim = $r->dir_config('lonLoadLim');
             &success($r,$form->{'uname'},$udom,$authhost,'noredirect',undef,          my $loadavg;
                      $form);          {
             my ($otherserver) = &Apache::lonnet::choose_server($udom);              my $loadfile=Apache::File->new('/proc/loadavg');
             $r->internal_redirect('/adm/switchserver?otherserver='.$otherserver);              $loadavg=<$loadfile>;
         }          }
     }          $loadavg =~ s/\s.*//g;
     return $canhost;          my $loadpercent=sprintf("%.1f",100*$loadavg/$loadlim);
 }          my $userloadpercent=&Apache::lonnet::userload();
   
 sub noswitch {  # ---------------------------------------------------------- Are we overloaded?
     my $result = &Apache::loncommon::start_page('Access to LON-CAPA unavailable').          if ((($userloadpercent>100.0)||($loadpercent>100.0))) {
                  '<h3>'.&mt('Session unavailable').'</h3>'.              my $unloaded=Apache::lonnet::spareserver($loadpercent,$userloadpercent,1,$form{'udom'});
                  &mt('This LON-CAPA server is unable to host your session.').'<br />'.              if (!$unloaded) {
                  '<p>'.&mt('Currently no other LON-CAPA server is available to host your session either.').'</p>'.                  ($unloaded) = &Apache::lonnet::choose_server($form{'udom'});
                  &Apache::loncommon::end_page();              }
     return $result;              if ($unloaded) {
 }                  &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',
                            undef,\%form);
 sub loginhelpdisplay {                  $r->internal_redirect('/adm/switchserver?otherserver='.$unloaded.'&origurl='.$firsturl);
     my ($authdomain) = @_;                  return OK;
     my $login_help = 1;              }
     my $lang = &Apache::lonlocal::current_language();          }
     if ($login_help) {          if (($is_balancer) && ($hosthere)) {
         my $dom = $authdomain;              $form{'noloadbalance'} = $hosthere;
         if ($dom eq '') {          }
             $dom = &Apache::lonnet::default_login_domain();          &success($r,$form{'uname'},$form{'udom'},$authhost,$firsturl,undef,
         }                   \%form);
         my %domconfhash = &Apache::loncommon::get_domainconf($dom);          return OK;
         my $loginhelp_url;      }
         if ($lang) {  }
             $loginhelp_url = $domconfhash{$dom.'.login.helpurl_'.$lang};  
             if ($loginhelp_url ne '') {  sub check_can_host {
                 return $loginhelp_url;      my ($r,$form,$authhost,$domdesc) = @_;
             }      return unless (ref($form) eq 'HASH');
         }      my $canhost = 1;
         $loginhelp_url = $domconfhash{$dom.'.login.helpurl_nolang'};      my $lonhost = $r->dir_config('lonHostID');
         if ($loginhelp_url ne '') {      my $udom = $form->{'udom'};
             return $loginhelp_url;      my @intdoms;
         } else {      my $internet_names = &Apache::lonnet::get_internet_names($lonhost);
             return '/adm/loginproblems.html';      if (ref($internet_names) eq 'ARRAY') {
         }          @intdoms = @{$internet_names};
     }      }
     return;      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)) {
 1;          my $machine_dom = &Apache::lonnet::host_domain($lonhost);
 __END__          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.1.122  
changed lines
  Added in v.1.142

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