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Diff for /loncom/auth/lonauth.pm between versions 1.125 and 1.141

version 1.125, 2013/08/13 13:22:24 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 Apache::File();  use Apache::File();
 use HTML::Entities;  use HTML::Entities;
     
 # ------------------------------------------------------------ Successful login  # ------------------------------------------------------------ Successful login
 sub success {  sub success {
     my ($r, $username, $domain, $authhost, $lowerurl, $extra_env,      my ($r, $username, $domain, $authhost, $lowerurl, $extra_env,
  $form) = @_;   $form) = @_;
   
 # ------------------------------------------------------------ Get cookie ready  # ------------------------------------------------------------ Get cookie ready
     my $cookie =      my $cookie =
  &Apache::loncommon::init_user_environment($r, $username, $domain,   &Apache::loncommon::init_user_environment($r, $username, $domain,
   $authhost, $form,    $authhost, $form,
   {'extra_env' => $extra_env,});    {'extra_env' => $extra_env,});
   
     my $public=($username eq 'public' && $domain eq 'public');      my $public=($username eq 'public' && $domain eq 'public');
   
     if ($public or $lowerurl eq 'noredirect') { return $cookie; }      if ($public or $lowerurl eq 'noredirect') { return $cookie; }
   
 # -------------------------------------------------------------------- Log this  # -------------------------------------------------------------------- Log this
   
     &Apache::lonnet::log($domain,$username,$authhost,      &Apache::lonnet::log($domain,$username,$authhost,
                          "Login $ENV{'REMOTE_ADDR'}");                           "Login $ENV{'REMOTE_ADDR'}");
   
 # ------------------------------------------------- Check for critical messages  # ------------------------------------------------- Check for critical messages
   
     my @what=&Apache::lonnet::dump('critical',$domain,$username);      my @what=&Apache::lonnet::dump('critical',$domain,$username);
     if ($what[0]) {      if ($what[0]) {
  if (($what[0] ne 'con_lost') && ($what[0]!~/^error\:/)) {   if (($what[0] ne 'con_lost') && ($what[0]!~/^error\:/)) {
     $lowerurl='/adm/email?critical=display';      $lowerurl='/adm/email?critical=display';
         }          }
     }      }
   
 # ------------------------------------------------------------ Get cookie ready  # ------------------------------------------------------------ Get cookie ready
     $cookie="lonID=$cookie; path=/";      $cookie="lonID=$cookie; path=/";
 # -------------------------------------------------------- Menu script and info  # -------------------------------------------------------- Menu script and info
     my $destination = $lowerurl;      my $destination = $lowerurl;
   
     if (defined($form->{role})) {      if (defined($form->{role})) {
         my $envkey = 'user.role.'.$form->{role};          my $envkey = 'user.role.'.$form->{role};
         my $now=time;          my $now=time;
         my $then=$env{'user.login.time'};          my $then=$env{'user.login.time'};
         my $refresh=$env{'user.refresh.time'};          my $refresh=$env{'user.refresh.time'};
         my $update=$env{'user.update.time'};          my $update=$env{'user.update.time'};
         if (!$update) {          if (!$update) {
             $update = $then;              $update = $then;
         }          }
         if (exists($env{$envkey})) {          if (exists($env{$envkey})) {
             my ($role,$where,$trolecode,$tstart,$tend,$tremark,$tstatus);              my ($role,$where,$trolecode,$tstart,$tend,$tremark,$tstatus);
             &Apache::lonnet::role_status($envkey,$update,$refresh,$now,\$role,\$where,              &Apache::lonnet::role_status($envkey,$update,$refresh,$now,\$role,\$where,
                                          \$trolecode,\$tstatus,\$tstart,\$tend);                                           \$trolecode,\$tstatus,\$tstart,\$tend);
             if ($tstatus eq 'is') {              if ($tstatus eq 'is') {
                 $destination  .= ($destination =~ /\?/) ? '&' : '?';                  $destination  .= ($destination =~ /\?/) ? '&' : '?';
                 my $newrole = &HTML::Entities::encode($form->{role},'"<>&');                  my $newrole = &HTML::Entities::encode($form->{role},'"<>&');
                 $destination .= 'selectrole=1&'.$newrole.'=1';                  $destination .= 'selectrole=1&'.$newrole.'=1';
             }              }
         }          }
     }      }
     if (defined($form->{symb})) {      if (defined($form->{symb})) {
         my $destsymb = $form->{symb};          my $destsymb = $form->{symb};
         $destination  .= ($destination =~ /\?/) ? '&' : '?';          $destination  .= ($destination =~ /\?/) ? '&' : '?';
         if ($destsymb =~ /___/) {          if ($destsymb =~ /___/) {
             # FIXME Need to deal with encrypted symbs and urls as needed.              # FIXME Need to deal with encrypted symbs and urls as needed.
             my ($map,$resid,$desturl)=split(/___/,$destsymb);              my ($map,$resid,$desturl)=split(/___/,$destsymb);
             unless ($desturl=~/^(adm|editupload|public)/) {              $desturl = &Apache::lonnet::clutter($desturl);
                 $desturl = &Apache::lonnet::clutter($desturl);              $desturl = &HTML::Entities::encode($desturl,'"<>&');
             }              $destsymb = &HTML::Entities::encode($destsymb,'"<>&');
             $desturl = &HTML::Entities::encode($desturl,'"<>&');              $destination .= 'destinationurl='.$desturl.
             $destsymb = &HTML::Entities::encode($destsymb,'"<>&');                              '&destsymb='.$destsymb;
             $destination .= '&destinationurl='.$desturl.          } else {
                             '&destsymb='.$destsymb;              $destsymb = &HTML::Entities::encode($destsymb,'"<>&');
         } else {              $destination .= 'destinationurl='.$destsymb;
             $destsymb = &HTML::Entities::encode($destsymb,'"<>&');          }
             $destination .= '&destinationurl='.$destsymb;      }
         }      if ($destination =~ m{^/adm/roles}) {
     }          $destination  .= ($destination =~ /\?/) ? '&' : '?';
     if ($destination =~ m{^/adm/roles}) {          $destination .= 'source=login';
         $destination  .= ($destination =~ /\?/) ? '&' : '?';      }
         $destination .= 'source=login';  
     }      my $windowinfo = Apache::lonhtmlcommon::scripttag('self.name="loncapaclient";');
       my $header = '<meta HTTP-EQUIV="Refresh" CONTENT="0; url='.$destination.'" />';
     my $windowinfo = Apache::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
     my $loginhelp = &loginhelpdisplay($form->{'udom'});  ENDSUCCESS
     if ($loginhelp) {      return;
         $loginhelp = '<p><a href="'.$loginhelp.'">'.&mt('Login problems?').'</a></p>';  }
     }  
   # --------------------------------------------------------------- Failed login!
     $r->print(  
        $start_page  sub failed {
       .'<h1>'.&mt('Sorry ...').'</h1>'      my ($r,$message,$form) = @_;
       .'<p class="LC_warning">'.&mt($message).'</p>'      (undef,undef,undef,my $clientmathml,my $clientunicode) =
       .'<p>'.&mt('Please [_1]log in again[_2].','<a href="'.$retry.'">','</a>')          &Apache::loncommon::decode_user_agent();
       .'</p>'      my $args = {};
       .$loginhelp      if ($clientunicode && !$clientmathml) {
       .$end_page          $args = {'browser.unicode' => 1};
     );      }
  }  
       my $start_page = &Apache::loncommon::start_page('Unsuccessful Login',undef,$args);
 # ------------------------------------------------------------------ Rerouting!      my $uname = &Apache::loncommon::cleanup_html($form->{'uname'});
       my $udom = &Apache::loncommon::cleanup_html($form->{'udom'});
 sub reroute {      if (&Apache::lonnet::domain($udom,'description') eq '') {
     my ($r) = @_;          undef($udom);
     &Apache::loncommon::content_type($r,'text/html');      }
     $r->send_http_header;      my $retry = '/adm/login';
     my $msg='<h1>'.&mt('Sorry ...').'</h1>'      if ($uname eq $form->{'uname'}) {
            .&mt('Please [_1]log in again[_2].');          $retry .= '?username='.$uname;
     &Apache::loncommon::simple_error_page($r,'Rerouting',$msg);      }
 }      if ($udom) {
           $retry .= (($retry=~/\?/)?'&amp;':'?').'domain='.$udom;
 # ---------------------------------------------------------------- Main handler      }
       if (exists($form->{role})) {
 sub handler {          my $role = &Apache::loncommon::cleanup_html($form->{role});
     my $r = shift;          if ($role ne '') {
     my $londocroot = $r->dir_config('lonDocRoot');              $retry .= (($retry=~/\?/)?'&amp;':'?').'role='.$role;
     my $form;          }
 # Are we re-routing?      }
     if (-e "$londocroot/lon-status/reroute.txt") {      if (exists($form->{symb})) {
  &reroute($r);          my $symb = &Apache::loncommon::cleanup_html($form->{symb});
  return OK;          if ($symb ne '') {
     }              $retry .= (($retry=~/\?/)?'&amp;':'?').'symb='.$symb;
           }
     &Apache::lonlocal::get_language_handle($r);      }
       my $end_page = &Apache::loncommon::end_page();
 # -------------------------------- Prevent users from attempting to login twice      &Apache::loncommon::content_type($r,'text/html');
     my $handle = &Apache::lonnet::check_for_valid_session($r);      $r->send_http_header;
     if ($handle ne '') {      my @actions =
         my $lonidsdir=$r->dir_config('lonIDsDir');           (&mt('Please [_1]log in again[_2].','<a href="'.$retry.'">','</a>'));
         if ($handle=~/^publicuser\_/) {      my $loginhelp = &loginhelpdisplay($udom);
 # For "public user" - remove it, we apparently really want to login      if ($loginhelp) {
             unlink($r->dir_config('lonIDsDir')."/$handle.id");          push(@actions, '<a href="'.$loginhelp.'">'.&mt('Login problems?').'</a>');
         } else {      }
 # Indeed, a valid token is found      #FIXME: link to helpdesk might be added here
             &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);  
     &Apache::loncommon::content_type($r,'text/html');      $r->print(
     $r->send_http_header;         $start_page
     my $start_page =         .'<h2>'.&mt('Sorry ...').'</h2>'
         &Apache::loncommon::start_page('Already logged in');        .&Apache::lonhtmlcommon::confirm_success(&mt($message),1).'<br /><br />'
     my $end_page =         .&Apache::lonhtmlcommon::actionbox(\@actions)
         &Apache::loncommon::end_page();        .$end_page
             my $dest = '/adm/roles';      );
             if ($env{'form.firsturl'} ne '') {   }
                 $dest = $env{'form.firsturl'};  
             }  # ------------------------------------------------------------------ Rerouting!
             $r->print(  
                $start_page  sub reroute {
               .'<p class="LC_warning">'.&mt('You are already logged in!').'</p>'      my ($r) = @_;
               .'<p>'.&mt('Please either [_1]continue the current session[_2] or [_3]log out[_4].'      &Apache::loncommon::content_type($r,'text/html');
                     ,'<a href="'.$dest.'">','</a>','<a href="/adm/logout">','</a>')      $r->send_http_header;
               .'</p>'      my $msg='<b>'.&mt('Sorry ...').'</b><br />'
               .$end_page             .&mt('Please [_1]log in again[_2].');
             );      &Apache::loncommon::simple_error_page($r,'Rerouting',$msg,{'no_auto_mt_msg' => 1});
             return OK;  }
         }  
     }  # ---------------------------------------------------------------- Main handler
   
 # ---------------------------------------------------- No valid token, continue  sub handler {
       my $r = shift;
       my $londocroot = $r->dir_config('lonDocRoot');
     my $buffer;  # Are we re-routing?
     if ($r->header_in('Content-length') > 0) {      if (-e "$londocroot/lon-status/reroute.txt") {
  $r->read($buffer,$r->header_in('Content-length'),0);   &reroute($r);
     }   return OK;
     my %form;      }
     foreach my $pair (split(/&/,$buffer)) {  
        my ($name,$value) = split(/=/,$pair);      &Apache::lonlocal::get_language_handle($r);
        $value =~ tr/+/ /;  
        $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;  # -------------------------------- Prevent users from attempting to login twice
        $form{$name}=$value;      my $handle = &Apache::lonnet::check_for_valid_session($r);
     }       if ($handle ne '') {
           my $lonidsdir=$r->dir_config('lonIDsDir');
     if ((!$form{'uname'}) || (!$form{'upass0'}) || (!$form{'udom'})) {          if ($handle=~/^publicuser\_/) {
  &failed($r,'Username, password and domain need to be specified.',  # For "public user" - remove it, we apparently really want to login
  \%form);              unlink($r->dir_config('lonIDsDir')."/$handle.id");
         return OK;          } else {
     }  # Indeed, a valid token is found
               &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);
 # split user logging in and "su"-user      &Apache::loncommon::content_type($r,'text/html');
       $r->send_http_header;
     ($form{'uname'},$form{'suname'})=split(/\:/,$form{'uname'});      my $start_page =
     $form{'uname'} = &LONCAPA::clean_username($form{'uname'});          &Apache::loncommon::start_page('Already logged in');
     $form{'suname'}= &LONCAPA::clean_username($form{'suname'});      my $end_page =
     $form{'udom'}  = &LONCAPA::clean_domain(  $form{'udom'});          &Apache::loncommon::end_page();
               my $dest = '/adm/roles';
     my $role   = $r->dir_config('lonRole');              if ($env{'form.firsturl'} ne '') {
     my $domain = $r->dir_config('lonDefDomain');                  $dest = $env{'form.firsturl'};
     my $prodir = $r->dir_config('lonUsersDir');              }
     my $contact_name = &mt('LON-CAPA helpdesk');              $r->print(
                  $start_page
 # ---------------------------------------- Get the information from login token                .'<p class="LC_warning">'.&mt('You are already logged in!').'</p>'
                 .'<p>'.&mt('Please either [_1]continue the current session[_2] or [_3]log out[_4].'
     my $tmpinfo=Apache::lonnet::reply('tmpget:'.$form{'logtoken'},                      ,'<a href="'.$dest.'">','</a>','<a href="/adm/logout">','</a>')
                                       $form{'serverid'});                .'</p>'
                 .$end_page
     if (($tmpinfo=~/^error/) || ($tmpinfo eq 'con_lost') ||               );
         ($tmpinfo eq 'no_such_host')) {              return OK;
  &failed($r,'Information needed to verify your login information is missing, inaccessible or expired.',\%form);          }
         return OK;      }
     } else {  
  my $reply = &Apache::lonnet::reply('tmpdel:'.$form{'logtoken'},  # ---------------------------------------------------- No valid token, continue
    $form{'serverid'});  
         if ( $reply ne 'ok' ) {  
             &failed($r,'Session could not be opened.',\%form);      my $buffer;
     &Apache::lonnet::logthis("ERROR got a reply of $reply when trying to contact ". $form{'serverid'}." to get login token");      if ($r->header_in('Content-length') > 0) {
     return OK;   $r->read($buffer,$r->header_in('Content-length'),0);
  }      }
     }      my %form;
       foreach my $pair (split(/&/,$buffer)) {
     if (!&Apache::lonnet::domain($form{'udom'})) {         my ($name,$value) = split(/=/,$pair);
         &failed($r,'The domain you provided is not a valid LON-CAPA domain.',\%form);         $value =~ tr/+/ /;
         return OK;         $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
     }         $form{$name}=$value;
       }
     my ($key,$firsturl,$rolestr,$symbstr)=split(/&/,$tmpinfo);  
     if ($rolestr) {      if ((!$form{'uname'}) || (!$form{'upass0'}) || (!$form{'udom'})) {
         $rolestr = &unescape($rolestr);   &failed($r,'Username, password and domain need to be specified.',
     }   \%form);
     if ($symbstr) {          return OK;
         $symbstr= &unescape($symbstr);      }
     }  
     if ($rolestr =~ /^role=/) {  # split user logging in and "su"-user
         (undef,$form{'role'}) = split('=',$rolestr);  
     }      ($form{'uname'},$form{'suname'})=split(/\:/,$form{'uname'});
     if ($symbstr =~ /^symb=/) {       $form{'uname'} = &LONCAPA::clean_username($form{'uname'});
         (undef,$form{'symb'}) = split('=',$symbstr);      $form{'suname'}= &LONCAPA::clean_username($form{'suname'});
     }      $form{'udom'}  = &LONCAPA::clean_domain(  $form{'udom'});
   
     my $keybin=pack("H16",$key);      my $role   = $r->dir_config('lonRole');
       my $domain = $r->dir_config('lonDefDomain');
     my $cipher;      my $prodir = $r->dir_config('lonUsersDir');
     if ($Crypt::DES::VERSION>=2.03) {      my $contact_name = &mt('LON-CAPA helpdesk');
  $cipher=new Crypt::DES $keybin;  
     }  # ---------------------------------------- Get the information from login token
     else {  
  $cipher=new DES $keybin;      my $tmpinfo=Apache::lonnet::reply('tmpget:'.$form{'logtoken'},
     }                                        $form{'serverid'});
     my $upass='';  
     for (my $i=0;$i<=2;$i++) {      if (($tmpinfo=~/^error/) || ($tmpinfo eq 'con_lost') ||
  my $chunk=          ($tmpinfo eq 'no_such_host')) {
     $cipher->decrypt(unpack("a8",pack("H16",substr($form{'upass'.$i},0,16))));   &failed($r,'Information needed to verify your login information is missing, inaccessible or expired.',\%form);
           return OK;
  $chunk.=      } else {
     $cipher->decrypt(unpack("a8",pack("H16",substr($form{'upass'.$i},16,16))));   my $reply = &Apache::lonnet::reply('tmpdel:'.$form{'logtoken'},
      $form{'serverid'});
  $chunk=substr($chunk,1,ord(substr($chunk,0,1)));          if ( $reply ne 'ok' ) {
  $upass.=$chunk;              &failed($r,'Session could not be opened.',\%form);
     }      &Apache::lonnet::logthis("ERROR got a reply of $reply when trying to contact ". $form{'serverid'}." to get login token");
       return OK;
 # ---------------------------------------------------------------- Authenticate   }
       }
     my %domconfig = &Apache::lonnet::get_dom('configuration',['usercreation'],$form{'udom'});  
     my ($cancreate,$statustocreate) =      if (!&Apache::lonnet::domain($form{'udom'})) {
         &Apache::createaccount::get_creation_controls($form{'udom'},$domconfig{'usercreation'});          &failed($r,'The domain you provided is not a valid LON-CAPA domain.',\%form);
     my $defaultauth;          return OK;
     if (ref($cancreate) eq 'ARRAY') {      }
         if (grep(/^login$/,@{$cancreate})) {  
             $defaultauth = 1;      my ($key,$firsturl,$rolestr,$symbstr,$iptokenstr)=split(/&/,$tmpinfo);
         }      if ($rolestr) {
     }          $rolestr = &unescape($rolestr);
     my $clientcancheckhost = 1;      }
     my $authhost=Apache::lonnet::authenticate($form{'uname'},$upass,      if ($symbstr) {
                                               $form{'udom'},$defaultauth,          $symbstr= &unescape($symbstr);
                                               $clientcancheckhost);      }
           if ($iptokenstr) {
 # --------------------------------------------------------------------- Failed?          $iptokenstr = &unescape($iptokenstr);
       }
     if ($authhost eq 'no_host') {      if ($rolestr =~ /^role=/) {
  &failed($r,'Username and/or password could not be authenticated.',          (undef,$form{'role'}) = split('=',$rolestr);
  \%form);      }
         return OK;      if ($symbstr =~ /^symb=/) {
     } elsif ($authhost eq 'no_account_on_host') {          (undef,$form{'symb'}) = split('=',$symbstr);
         if ($defaultauth) {      }
             my $domdesc = &Apache::lonnet::domain($form{'udom'},'description');      if ($iptokenstr =~ /^iptoken=/) {
             unless (&check_can_host($r,\%form,'no_account_on_host',$domdesc)) {          (undef,$form{'iptoken'}) = split('=',$iptokenstr);
                 return OK;      }
             }  
             my $start_page =       my $upass = $ENV{HTTPS} ? $form{'upass0'}
                 &Apache::loncommon::start_page('Create a user account in LON-CAPA');          : &Apache::loncommon::des_decrypt($key,$form{'upass0'});
             my $lonhost = $r->dir_config('lonHostID');  
             my $origmail = $Apache::lonnet::perlvar{'lonSupportEMail'};  # ---------------------------------------------------------------- Authenticate
             my $contacts =   
                 &Apache::loncommon::build_recipient_list(undef,'helpdeskmail',      my %domconfig = &Apache::lonnet::get_dom('configuration',['usercreation'],$form{'udom'});
                                                         $form{'udom'},$origmail);      my ($cancreate,$statustocreate) =
             my ($contact_email) = split(',',$contacts);           &Apache::createaccount::get_creation_controls($form{'udom'},$domconfig{'usercreation'});
             my $output =       my $defaultauth;
                 &Apache::createaccount::username_check($form{'uname'},$form{'udom'},      if (ref($cancreate) eq 'ARRAY') {
                                                        $domdesc,'',$lonhost,          if (grep(/^login$/,@{$cancreate})) {
                                                        $contact_email,$contact_name,              $defaultauth = 1;
                                                        undef,$statustocreate);          }
             &Apache::loncommon::content_type($r,'text/html');      }
             $r->send_http_header;      my $clientcancheckhost = 1;
             &Apache::createaccount::print_header($r,$start_page);      my $authhost=Apache::lonnet::authenticate($form{'uname'},$upass,
             $r->print('<h3>'.&mt('Account creation').'</h3>'.                                                $form{'udom'},$defaultauth,
                       &mt('Although your username and password were authenticated, you do not currently have a LON-CAPA account at this institution.').'<br />'.                                                $clientcancheckhost);
                       $output.&Apache::loncommon::end_page());     
             return OK;  # --------------------------------------------------------------------- Failed?
         } else {  
             &failed($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);      if ($authhost eq 'no_host') {
             return OK;   &failed($r,'Username and/or password could not be authenticated.',
         }   \%form);
     }          return OK;
       } elsif ($authhost eq 'no_account_on_host') {
     if (($firsturl eq '') ||           if ($defaultauth) {
  ($firsturl=~/^\/adm\/(logout|remote)/)) {              my $domdesc = &Apache::lonnet::domain($form{'udom'},'description');
  $firsturl='/adm/roles';              unless (&check_can_host($r,\%form,'no_account_on_host',$domdesc)) {
     }                  return OK;
 # --------------------------------- Are we attempting to login as somebody else?              }
     if ($form{'suname'}) {              my $start_page =
 # ------------ see if the original user has enough privileges to pull this stunt                  &Apache::loncommon::start_page('Create a user account in LON-CAPA');
  if (&Apache::lonnet::privileged($form{'uname'},$form{'udom'})) {              my $lonhost = $r->dir_config('lonHostID');
 # ---------------------------------------------------- see if the su-user exists              my $origmail = $Apache::lonnet::perlvar{'lonSupportEMail'};
     unless (&Apache::lonnet::homeserver($form{'suname'},$form{'udom'})              my $contacts =
  eq 'no_host') {                  &Apache::loncommon::build_recipient_list(undef,'helpdeskmail',
  &Apache::lonnet::logthis(&Apache::lonnet::homeserver($form{'suname'},$form{'udom'}));                                                          $form{'udom'},$origmail);
 # ------------------------------ see if the su-user is not too highly privileged              my ($contact_email) = split(',',$contacts);
  unless (&Apache::lonnet::privileged($form{'suname'},$form{'udom'})) {              my $output =
 # -------------------------------------------------------- actually switch users                  &Apache::createaccount::username_check($form{'uname'},$form{'udom'},
     &Apache::lonnet::logperm('User '.$form{'uname'}.' at '.$form{'udom'}.                                                         $domdesc,'',$lonhost,
  ' logging in as '.$form{'suname'});                                                         $contact_email,$contact_name,
     $form{'uname'}=$form{'suname'};                                                         undef,$statustocreate);
  } else {              &Apache::loncommon::content_type($r,'text/html');
     &Apache::lonnet::logthis('Attempted switch user to privileged user');              $r->send_http_header;
  }              &Apache::createaccount::print_header($r,$start_page);
     }              $r->print('<h3>'.&mt('Account creation').'</h3>'.
  } else {                        &mt('Although your username and password were authenticated, you do not currently have a LON-CAPA account at this institution.').'<br />'.
     &Apache::lonnet::logthis('Non-privileged user attempting switch user');                        $output.&Apache::loncommon::end_page());
  }              return OK;
     }          } else {
               &failed($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 ($is_balancer,$otherserver) =               return OK;
         &Apache::lonnet::check_loadbalancing($form{'uname'},$form{'udom'});          }
       }
     if ($is_balancer) {  
         if (!$otherserver) {       if (($firsturl eq '') ||
             ($otherserver) = &Apache::lonnet::choose_server($form{'udom'});   ($firsturl=~/^\/adm\/(logout|remote)/)) {
         }   $firsturl='/adm/roles';
         if ($otherserver) {      }
             &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef,  
                      \%form);      my $hosthere;
     $r->internal_redirect('/adm/switchserver?otherserver='.$otherserver.'&origurl='.$firsturl);      if ($form{'iptoken'}) {
         } else {          my %sessiondata = &Apache::lonnet::tmpget($form{'iptoken'});
             $r->print(&noswitch());          my $delete = &Apache::lonnet::tmpdel($form{'iptoken'});
         }          if (($sessiondata{'domain'} eq $form{'udom'}) &&
         return OK;              ($sessiondata{'username'} eq $form{'uname'})) {
     } else {              $hosthere = 1;
         if (!&check_can_host($r,\%form,$authhost)) {          }
             my ($otherserver) = &Apache::lonnet::choose_server($form{'udom'});      }
             if ($otherserver) {  
                 &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef,  # --------------------------------- Are we attempting to login as somebody else?
                          \%form);      if ($form{'suname'}) {
                 $r->internal_redirect('/adm/switchserver?otherserver='.$otherserver.'&origurl='.$firsturl);  # ------------ see if the original user has enough privileges to pull this stunt
             } else {   if (&Apache::lonnet::privileged($form{'uname'},$form{'udom'})) {
                 $r->print(&noswitch());  # ---------------------------------------------------- see if the su-user exists
             }      unless (&Apache::lonnet::homeserver($form{'suname'},$form{'udom'})
             return OK;   eq 'no_host') {
         }   &Apache::lonnet::logthis(&Apache::lonnet::homeserver($form{'suname'},$form{'udom'}));
   # ------------------------------ see if the su-user is not too highly privileged
 # ------------------------------------------------------- Do the load balancing   unless (&Apache::lonnet::privileged($form{'suname'},$form{'udom'})) {
   # -------------------------------------------------------- actually switch users
 # ---------------------------------------------------------- Determine own load      &Apache::lonnet::logperm('User '.$form{'uname'}.' at '.$form{'udom'}.
         my $loadlim = $r->dir_config('lonLoadLim');   ' logging in as '.$form{'suname'});
         my $loadavg;      $form{'uname'}=$form{'suname'};
         {   } else {
             my $loadfile=Apache::File->new('/proc/loadavg');      &Apache::lonnet::logthis('Attempted switch user to privileged user');
             $loadavg=<$loadfile>;   }
         }      }
         $loadavg =~ s/\s.*//g;   } else {
         my $loadpercent=sprintf("%.1f",100*$loadavg/$loadlim);      &Apache::lonnet::logthis('Non-privileged user attempting switch user');
         my $userloadpercent=&Apache::lonnet::userload();   }
       }
 # ---------------------------------------------------------- Are we overloaded?  
         if ((($userloadpercent>100.0)||($loadpercent>100.0))) {      my ($is_balancer,$otherserver);
             my $unloaded=Apache::lonnet::spareserver($loadpercent,$userloadpercent,1,$form{'udom'});  
             if (!$unloaded) {      unless ($hosthere) {
                 ($unloaded) = &Apache::lonnet::choose_server($form{'udom'});          ($is_balancer,$otherserver) =
             }              &Apache::lonnet::check_loadbalancing($form{'uname'},$form{'udom'},'login');
             if ($unloaded) {          if ($is_balancer) {
                 &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',              if ($otherserver eq '') {
                          undef,\%form);                  my $lowest_load;
                 $r->internal_redirect('/adm/switchserver?otherserver='.$unloaded.'&origurl='.$firsturl);                  ($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'});
         }                  }
         &success($r,$form{'uname'},$form{'udom'},$authhost,$firsturl,undef,              }
                  \%form);              if ($otherserver ne '') {
         return OK;                  my @hosts = &Apache::lonnet::current_machine_ids();
     }                  if (grep(/^\Q$otherserver\E$/,@hosts)) {
 }                      $hosthere = $otherserver;
                   }
 sub check_can_host {              }
     my ($r,$form,$authhost,$domdesc) = @_;          }
     return unless (ref($form) eq 'HASH');      }
     my $canhost = 1;  
     my $lonhost = $r->dir_config('lonHostID');      if (($is_balancer) && (!$hosthere)) {
     my $udom = $form->{'udom'};          if ($otherserver) {
     my @intdoms;              &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef,
     my $internet_names = &Apache::lonnet::get_internet_names($lonhost);                       \%form);
     if (ref($internet_names) eq 'ARRAY') {              my $switchto = '/adm/switchserver?otherserver='.$otherserver;
         @intdoms = @{$internet_names};              if (($firsturl) && ($firsturl ne '/adm/switchserver') && ($firsturl ne '/adm/roles')) {
     }                  $switchto .= '&origurl='.$firsturl;
     my $uprimary_id = &Apache::lonnet::domain($udom,'primary');              }
     my $uint_dom = &Apache::lonnet::internet_dom($uprimary_id);              if ($form{'role'}) {
     unless ($uint_dom ne '' && grep(/^\Q$uint_dom\E$/,@intdoms)) {                  $switchto .= '&role='.$form{'role'};
         my $machine_dom = &Apache::lonnet::host_domain($lonhost);              }
         my $hostname = &Apache::lonnet::hostname($lonhost);              if ($form{'symb'}) {
         my $serverhomeID = &Apache::lonnet::get_server_homeID($hostname);                  $switchto .= '&symb='.$form{'symb'};
         my $serverhomedom = &Apache::lonnet::host_domain($serverhomeID);              }
         my %defdomdefaults = &Apache::lonnet::get_domain_defaults($serverhomedom);              $r->internal_redirect($switchto);
         my %udomdefaults = &Apache::lonnet::get_domain_defaults($udom);          } else {
         my $loncaparev;              $r->print(&noswitch());
         if ($authhost eq 'no_account_on_host') {          }
             $loncaparev = &Apache::lonnet::get_server_loncaparev($machine_dom);          return OK;
         } else {      } else {
             $loncaparev = &Apache::lonnet::get_server_loncaparev($machine_dom,$lonhost);          if (!&check_can_host($r,\%form,$authhost)) {
         }              my ($otherserver) = &Apache::lonnet::choose_server($form{'udom'});
         $canhost = &Apache::lonnet::can_host_session($udom,$lonhost,$loncaparev,              if ($otherserver) {
                                                      $udomdefaults{'remotesessions'},                  &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef,
                                                      $defdomdefaults{'hostedsessions'});                           \%form);
     }                  my $switchto = '/adm/switchserver?otherserver='.$otherserver;
     unless ($canhost) {                  if (($firsturl) && ($firsturl ne '/adm/switchserver') && ($firsturl ne '/adm/roles')) {
         if ($authhost eq 'no_account_on_host') {                      $switchto .= '&origurl='.$firsturl;
             my $checkloginvia = 1;                  }
             my ($login_host,$hostname) =                   if ($form{'role'}) {
                 &Apache::lonnet::choose_server($udom,$checkloginvia);                      $switchto .= '&role='.$form{'role'};
             &Apache::loncommon::content_type($r,'text/html');                  }
             $r->send_http_header;                  if ($form{'symb'}) {
             if ($login_host ne '') {                      $switchto .= '&symb='.$form{'symb'};
                 my $protocol = $Apache::lonnet::protocol{$login_host};                  }
                 $protocol = 'http' if ($protocol ne 'https');                  $r->internal_redirect($switchto);
                 my $newurl = $protocol.'://'.$hostname.'/adm/createaccount';              } else {
                 $r->print(&Apache::loncommon::start_page('Create a user account in LON-CAPA').                  $r->print(&noswitch());
                           '<h3>'.&mt('Account creation').'</h3>'.              }
                           &mt('You do not currently have a LON-CAPA account at this institution.').'<br />'.              return OK;
                           '<p>'.&mt('You will be able to create one by logging into a LON-CAPA server within the [_1] domain.',$domdesc).'</p>'.          }
                           '<p>'.&mt('[_1]Log in[_2]','<a href="'.$newurl.'">','</a>').  
                           &Apache::loncommon::end_page());  # ------------------------------------------------------- Do the load balancing
             } else {  
                 $r->print(&Apache::loncommon::start_page('Access to LON-CAPA unavailable').  # ---------------------------------------------------------- Determine own load
                           '<h3>'.&mt('Account creation unavailable').'</h3>'.          my $loadlim = $r->dir_config('lonLoadLim');
                           &mt('You do not currently have a LON-CAPA account at this institution.').'<br />'.          my $loadavg;
                           '<p>'.&mt('Currently a LON-CAPA server is not available within the [_1] domain for you to log-in to, to create an account.',$domdesc).'</p>'.          {
                           &Apache::loncommon::end_page());              my $loadfile=Apache::File->new('/proc/loadavg');
             }              $loadavg=<$loadfile>;
         } else {          }
             &success($r,$form->{'uname'},$udom,$authhost,'noredirect',undef,          $loadavg =~ s/\s.*//g;
                      $form);          my $loadpercent=sprintf("%.1f",100*$loadavg/$loadlim);
             my ($otherserver) = &Apache::lonnet::choose_server($udom);          my $userloadpercent=&Apache::lonnet::userload();
             $r->internal_redirect('/adm/switchserver?otherserver='.$otherserver);  
         }  # ---------------------------------------------------------- Are we overloaded?
     }          if ((($userloadpercent>100.0)||($loadpercent>100.0))) {
     return $canhost;              my $unloaded=Apache::lonnet::spareserver($loadpercent,$userloadpercent,1,$form{'udom'});
 }              if (!$unloaded) {
                   ($unloaded) = &Apache::lonnet::choose_server($form{'udom'});
 sub noswitch {              }
     my $result = &Apache::loncommon::start_page('Access to LON-CAPA unavailable').              if ($unloaded) {
                  '<h3>'.&mt('Session unavailable').'</h3>'.                  &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',
                  &mt('This LON-CAPA server is unable to host your session.').'<br />'.                           undef,\%form);
                  '<p>'.&mt('Currently no other LON-CAPA server is available to host your session either.').'</p>'.                  $r->internal_redirect('/adm/switchserver?otherserver='.$unloaded.'&origurl='.$firsturl);
                  &Apache::loncommon::end_page();                  return OK;
     return $result;              }
 }          }
           if (($is_balancer) && ($hosthere)) {
 sub loginhelpdisplay {              $form{'noloadbalance'} = $hosthere;
     my ($authdomain) = @_;          }
     my $login_help = 1;          &success($r,$form{'uname'},$form{'udom'},$authhost,$firsturl,undef,
     my $lang = &Apache::lonlocal::current_language();                   \%form);
     if ($login_help) {          return OK;
         my $dom = $authdomain;      }
         if ($dom eq '') {  }
             $dom = &Apache::lonnet::default_login_domain();  
         }  sub check_can_host {
         my %domconfhash = &Apache::loncommon::get_domainconf($dom);      my ($r,$form,$authhost,$domdesc) = @_;
         my $loginhelp_url;      return unless (ref($form) eq 'HASH');
         if ($lang) {      my $canhost = 1;
             $loginhelp_url = $domconfhash{$dom.'.login.helpurl_'.$lang};      my $lonhost = $r->dir_config('lonHostID');
             if ($loginhelp_url ne '') {      my $udom = $form->{'udom'};
                 return $loginhelp_url;      my @intdoms;
             }      my $internet_names = &Apache::lonnet::get_internet_names($lonhost);
         }      if (ref($internet_names) eq 'ARRAY') {
         $loginhelp_url = $domconfhash{$dom.'.login.helpurl_nolang'};          @intdoms = @{$internet_names};
         if ($loginhelp_url ne '') {      }
             return $loginhelp_url;      my $uprimary_id = &Apache::lonnet::domain($udom,'primary');
         } else {      my $uint_dom = &Apache::lonnet::internet_dom($uprimary_id);
             return '/adm/loginproblems.html';      unless ($uint_dom ne '' && grep(/^\Q$uint_dom\E$/,@intdoms)) {
         }          my $machine_dom = &Apache::lonnet::host_domain($lonhost);
     }          my $hostname = &Apache::lonnet::hostname($lonhost);
     return;          my $serverhomeID = &Apache::lonnet::get_server_homeID($hostname);
 }          my $serverhomedom = &Apache::lonnet::host_domain($serverhomeID);
           my %defdomdefaults = &Apache::lonnet::get_domain_defaults($serverhomedom);
 1;          my %udomdefaults = &Apache::lonnet::get_domain_defaults($udom);
 __END__          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.1.125  
changed lines
  Added in v.1.141

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