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Diff for /loncom/auth/lonauth.pm between versions 1.125 and 1.136

version 1.125, 2013/08/13 13:22:24 version 1.136, 2014/12/05 12:03:20
Line 1 Line 1
 # The LearningOnline Network  # The LearningOnline Network
 # User Authentication Module  # User Authentication Module
 #  #
 # $Id$  # $Id$
 #  #
 # Copyright Michigan State University Board of Trustees  # Copyright Michigan State University Board of Trustees
 #  #
 # This file is part of the LearningOnline Network with CAPA (LON-CAPA).  # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
 #  #
 # LON-CAPA is free software; you can redistribute it and/or modify  # LON-CAPA is free software; you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by  # it under the terms of the GNU General Public License as published by
 # the Free Software Foundation; either version 2 of the License, or  # the Free Software Foundation; either version 2 of the License, or
 # (at your option) any later version.  # (at your option) any later version.
 #  #
 # LON-CAPA is distributed in the hope that it will be useful,  # LON-CAPA is distributed in the hope that it will be useful,
 # but WITHOUT ANY WARRANTY; without even the implied warranty of  # but WITHOUT ANY WARRANTY; without even the implied warranty of
 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the  # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 # GNU General Public License for more details.  # GNU General Public License for more details.
 #  #
 # You should have received a copy of the GNU General Public License  # You should have received a copy of the GNU General Public License
 # along with LON-CAPA; if not, write to the Free Software  # along with LON-CAPA; if not, write to the Free Software
 # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA  # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 #  #
 # /home/httpd/html/adm/gpl.txt  # /home/httpd/html/adm/gpl.txt
 #  #
 # http://www.lon-capa.org/  # http://www.lon-capa.org/
 #  #
   
 package Apache::lonauth;  package Apache::lonauth;
   
 use strict;  use strict;
 use LONCAPA;  use LONCAPA;
 use Apache::Constants qw(:common);  use Apache::Constants qw(:common);
 use CGI qw(:standard);  use CGI qw(:standard);
 use DynaLoader; # for Crypt::DES version  use DynaLoader; # for Crypt::DES version
 use Crypt::DES;  use Crypt::DES;
 use Apache::loncommon();  use Apache::loncommon();
 use Apache::lonnet;  use Apache::lonnet;
 use Apache::lonmenu();  use Apache::lonmenu();
 use Apache::createaccount;  use Apache::createaccount;
 use Fcntl qw(:flock);  use Fcntl qw(:flock);
 use Apache::lonlocal;  use Apache::lonlocal;
 use Apache::File();  use Apache::File();
 use HTML::Entities;  use HTML::Entities;
     
 # ------------------------------------------------------------ Successful login  # ------------------------------------------------------------ Successful login
 sub success {  sub success {
     my ($r, $username, $domain, $authhost, $lowerurl, $extra_env,      my ($r, $username, $domain, $authhost, $lowerurl, $extra_env,
  $form) = @_;   $form) = @_;
   
 # ------------------------------------------------------------ Get cookie ready  # ------------------------------------------------------------ Get cookie ready
     my $cookie =      my $cookie =
  &Apache::loncommon::init_user_environment($r, $username, $domain,   &Apache::loncommon::init_user_environment($r, $username, $domain,
   $authhost, $form,    $authhost, $form,
   {'extra_env' => $extra_env,});    {'extra_env' => $extra_env,});
   
     my $public=($username eq 'public' && $domain eq 'public');      my $public=($username eq 'public' && $domain eq 'public');
   
     if ($public or $lowerurl eq 'noredirect') { return $cookie; }      if ($public or $lowerurl eq 'noredirect') { return $cookie; }
   
 # -------------------------------------------------------------------- Log this  # -------------------------------------------------------------------- Log this
   
     &Apache::lonnet::log($domain,$username,$authhost,      &Apache::lonnet::log($domain,$username,$authhost,
                          "Login $ENV{'REMOTE_ADDR'}");                           "Login $ENV{'REMOTE_ADDR'}");
   
 # ------------------------------------------------- Check for critical messages  # ------------------------------------------------- Check for critical messages
   
     my @what=&Apache::lonnet::dump('critical',$domain,$username);      my @what=&Apache::lonnet::dump('critical',$domain,$username);
     if ($what[0]) {      if ($what[0]) {
  if (($what[0] ne 'con_lost') && ($what[0]!~/^error\:/)) {   if (($what[0] ne 'con_lost') && ($what[0]!~/^error\:/)) {
     $lowerurl='/adm/email?critical=display';      $lowerurl='/adm/email?critical=display';
         }          }
     }      }
   
 # ------------------------------------------------------------ Get cookie ready  # ------------------------------------------------------------ Get cookie ready
     $cookie="lonID=$cookie; path=/";      $cookie="lonID=$cookie; path=/";
 # -------------------------------------------------------- Menu script and info  # -------------------------------------------------------- Menu script and info
     my $destination = $lowerurl;      my $destination = $lowerurl;
   
     if (defined($form->{role})) {      if (defined($form->{role})) {
         my $envkey = 'user.role.'.$form->{role};          my $envkey = 'user.role.'.$form->{role};
         my $now=time;          my $now=time;
         my $then=$env{'user.login.time'};          my $then=$env{'user.login.time'};
         my $refresh=$env{'user.refresh.time'};          my $refresh=$env{'user.refresh.time'};
         my $update=$env{'user.update.time'};          my $update=$env{'user.update.time'};
         if (!$update) {          if (!$update) {
             $update = $then;              $update = $then;
         }          }
         if (exists($env{$envkey})) {          if (exists($env{$envkey})) {
             my ($role,$where,$trolecode,$tstart,$tend,$tremark,$tstatus);              my ($role,$where,$trolecode,$tstart,$tend,$tremark,$tstatus);
             &Apache::lonnet::role_status($envkey,$update,$refresh,$now,\$role,\$where,              &Apache::lonnet::role_status($envkey,$update,$refresh,$now,\$role,\$where,
                                          \$trolecode,\$tstatus,\$tstart,\$tend);                                           \$trolecode,\$tstatus,\$tstart,\$tend);
             if ($tstatus eq 'is') {              if ($tstatus eq 'is') {
                 $destination  .= ($destination =~ /\?/) ? '&' : '?';                  $destination  .= ($destination =~ /\?/) ? '&' : '?';
                 my $newrole = &HTML::Entities::encode($form->{role},'"<>&');                  my $newrole = &HTML::Entities::encode($form->{role},'"<>&');
                 $destination .= 'selectrole=1&'.$newrole.'=1';                  $destination .= 'selectrole=1&'.$newrole.'=1';
             }              }
         }          }
     }      }
     if (defined($form->{symb})) {      if (defined($form->{symb})) {
         my $destsymb = $form->{symb};          my $destsymb = $form->{symb};
         $destination  .= ($destination =~ /\?/) ? '&' : '?';          $destination  .= ($destination =~ /\?/) ? '&' : '?';
         if ($destsymb =~ /___/) {          if ($destsymb =~ /___/) {
             # FIXME Need to deal with encrypted symbs and urls as needed.              # FIXME Need to deal with encrypted symbs and urls as needed.
             my ($map,$resid,$desturl)=split(/___/,$destsymb);              my ($map,$resid,$desturl)=split(/___/,$destsymb);
             unless ($desturl=~/^(adm|editupload|public)/) {              unless ($desturl=~/^(adm|editupload|public)/) {
                 $desturl = &Apache::lonnet::clutter($desturl);                  $desturl = &Apache::lonnet::clutter($desturl);
             }              }
             $desturl = &HTML::Entities::encode($desturl,'"<>&');              $desturl = &HTML::Entities::encode($desturl,'"<>&');
             $destsymb = &HTML::Entities::encode($destsymb,'"<>&');              $destsymb = &HTML::Entities::encode($destsymb,'"<>&');
             $destination .= '&destinationurl='.$desturl.              $destination .= 'destinationurl='.$desturl.
                             '&destsymb='.$destsymb;                              '&destsymb='.$destsymb;
         } else {          } else {
             $destsymb = &HTML::Entities::encode($destsymb,'"<>&');              $destsymb = &HTML::Entities::encode($destsymb,'"<>&');
             $destination .= '&destinationurl='.$destsymb;              $destination .= 'destinationurl='.$destsymb;
         }          }
     }      }
     if ($destination =~ m{^/adm/roles}) {      if ($destination =~ m{^/adm/roles}) {
         $destination  .= ($destination =~ /\?/) ? '&' : '?';          $destination  .= ($destination =~ /\?/) ? '&' : '?';
         $destination .= 'source=login';          $destination .= 'source=login';
     }      }
   
     my $windowinfo = Apache::lonhtmlcommon::scripttag('self.name="loncapaclient";');      my $windowinfo = Apache::lonhtmlcommon::scripttag('self.name="loncapaclient";');
     my $header = '<meta HTTP-EQUIV="Refresh" CONTENT="0; url='.$destination.'" />';      my $header = '<meta HTTP-EQUIV="Refresh" CONTENT="0; url='.$destination.'" />';
     my $brcrum = [{'href' => '',      my $brcrum = [{'href' => '',
                    'text' => 'Successful Login'},];                     'text' => 'Successful Login'},];
     my $start_page=&Apache::loncommon::start_page('Successful Login',      my $start_page=&Apache::loncommon::start_page('Successful Login',
                                                   $header,                                                    $header,
                                                   {'bread_crumbs' => $brcrum,});                                                    {'bread_crumbs' => $brcrum,});
     my $end_page  =&Apache::loncommon::end_page();      my $end_page  =&Apache::loncommon::end_page();
   
  my $continuelink='<a href="'.$destination.'">'.&mt('Continue').'</a>';   my $continuelink='<a href="'.$destination.'">'.&mt('Continue').'</a>';
 # ------------------------------------------------- Output for successful login  # ------------------------------------------------- Output for successful login
   
     &Apache::loncommon::content_type($r,'text/html');      &Apache::loncommon::content_type($r,'text/html');
     $r->header_out('Set-cookie' => $cookie);      $r->header_out('Set-cookie' => $cookie);
     $r->send_http_header;      $r->send_http_header;
   
     my %lt=&Apache::lonlocal::texthash(      my %lt=&Apache::lonlocal::texthash(
        'wel' => 'Welcome',         'wel' => 'Welcome',
        'pro' => 'Login problems?',         'pro' => 'Login problems?',
        );         );
     my $loginhelp = &loginhelpdisplay($domain);      my $loginhelp = &loginhelpdisplay($domain);
     if ($loginhelp) {      if ($loginhelp) {
         $loginhelp = '<p><a href="'.$loginhelp.'">'.$lt{'pro'}.'</a></p>';          $loginhelp = '<p><a href="'.$loginhelp.'">'.$lt{'pro'}.'</a></p>';
     }      }
   
     my $welcome = &mt('Welcome to the Learning[_1]Online[_2] Network with CAPA. Please wait while your session is being set up.','<i>','</i>');       my $welcome = &mt('Welcome to the Learning[_1]Online[_2] Network with CAPA. Please wait while your session is being set up.','<i>','</i>');
     $r->print(<<ENDSUCCESS);      $r->print(<<ENDSUCCESS);
 $start_page  $start_page
 $windowinfo  $windowinfo
 <h1>$lt{'wel'}</h1>  <h1>$lt{'wel'}</h1>
 $welcome  $welcome
 $loginhelp  $loginhelp
 $continuelink  $continuelink
 $end_page  $end_page
 ENDSUCCESS  ENDSUCCESS
 }      return;
   }
 # --------------------------------------------------------------- Failed login!  
   # --------------------------------------------------------------- Failed login!
 sub failed {  
     my ($r,$message,$form) = @_;  sub failed {
     my $start_page = &Apache::loncommon::start_page('Unsuccessful Login',undef);      my ($r,$message,$form) = @_;
     my $retry = '/adm/login?username='.$form->{'uname'}.      (undef,undef,undef,my $clientmathml,my $clientunicode) =
                 '&domain='.$form->{'udom'};          &Apache::loncommon::decode_user_agent();
     if (exists($form->{role})) {      my $args = {};
         $retry .= '&role='.$form->{role};      if ($clientunicode && !$clientmathml) {
     }          $args = {'browser.unicode' => 1};
     if (exists($form->{symb})) {      }
         $retry .= '&symb='.$form->{symb};  
     }      my $start_page = &Apache::loncommon::start_page('Unsuccessful Login',undef,$args);
     my $end_page   = &Apache::loncommon::end_page();      my $uname = &Apache::loncommon::cleanup_html($form->{'uname'});
     &Apache::loncommon::content_type($r,'text/html');      my $udom = &Apache::loncommon::cleanup_html($form->{'udom'});
     $r->send_http_header;      if (&Apache::lonnet::domain($udom,'description') eq '') {
     my $loginhelp = &loginhelpdisplay($form->{'udom'});          undef($udom);
     if ($loginhelp) {      }
         $loginhelp = '<p><a href="'.$loginhelp.'">'.&mt('Login problems?').'</a></p>';      my $retry = '/adm/login';
     }      if ($uname eq $form->{'uname'}) {
           $retry .= '?username='.$uname;
     $r->print(      }
        $start_page      if ($udom) {
       .'<h1>'.&mt('Sorry ...').'</h1>'          $retry .= (($retry=~/\?/)?'&amp;':'?').'domain='.$udom;
       .'<p class="LC_warning">'.&mt($message).'</p>'      }
       .'<p>'.&mt('Please [_1]log in again[_2].','<a href="'.$retry.'">','</a>')      if (exists($form->{role})) {
       .'</p>'          my $role = &Apache::loncommon::cleanup_html($form->{role});
       .$loginhelp          if ($role ne '') {
       .$end_page              $retry .= (($retry=~/\?/)?'&amp;':'?').'role='.$role;
     );          }
  }      }
       if (exists($form->{symb})) {
 # ------------------------------------------------------------------ Rerouting!          my $symb = &Apache::loncommon::cleanup_html($form->{symb});
           if ($symb ne '') {
 sub reroute {              $retry .= (($retry=~/\?/)?'&amp;':'?').'symb='.$symb;
     my ($r) = @_;          }
     &Apache::loncommon::content_type($r,'text/html');      }
     $r->send_http_header;      my $end_page = &Apache::loncommon::end_page();
     my $msg='<h1>'.&mt('Sorry ...').'</h1>'      &Apache::loncommon::content_type($r,'text/html');
            .&mt('Please [_1]log in again[_2].');      $r->send_http_header;
     &Apache::loncommon::simple_error_page($r,'Rerouting',$msg);      my @actions =
 }           (&mt('Please [_1]log in again[_2].','<a href="'.$retry.'">','</a>'));
       my $loginhelp = &loginhelpdisplay($udom);
 # ---------------------------------------------------------------- Main handler      if ($loginhelp) {
           push(@actions, '<a href="'.$loginhelp.'">'.&mt('Login problems?').'</a>');
 sub handler {      }
     my $r = shift;      #FIXME: link to helpdesk might be added here
     my $londocroot = $r->dir_config('lonDocRoot');  
     my $form;      $r->print(
 # Are we re-routing?         $start_page
     if (-e "$londocroot/lon-status/reroute.txt") {        .'<h2>'.&mt('Sorry ...').'</h2>'
  &reroute($r);        .&Apache::lonhtmlcommon::confirm_success(&mt($message),1).'<br /><br />'
  return OK;        .&Apache::lonhtmlcommon::actionbox(\@actions)
     }        .$end_page
       );
     &Apache::lonlocal::get_language_handle($r);   }
   
 # -------------------------------- Prevent users from attempting to login twice  # ------------------------------------------------------------------ Rerouting!
     my $handle = &Apache::lonnet::check_for_valid_session($r);  
     if ($handle ne '') {  sub reroute {
         my $lonidsdir=$r->dir_config('lonIDsDir');      my ($r) = @_;
         if ($handle=~/^publicuser\_/) {      &Apache::loncommon::content_type($r,'text/html');
 # For "public user" - remove it, we apparently really want to login      $r->send_http_header;
             unlink($r->dir_config('lonIDsDir')."/$handle.id");      my $msg='<b>'.&mt('Sorry ...').'</b><br />'
         } else {             .&mt('Please [_1]log in again[_2].');
 # Indeed, a valid token is found      &Apache::loncommon::simple_error_page($r,'Rerouting',$msg,{'no_auto_mt_msg' => 1});
             &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);  }
     &Apache::loncommon::content_type($r,'text/html');  
     $r->send_http_header;  # ---------------------------------------------------------------- Main handler
     my $start_page =   
         &Apache::loncommon::start_page('Already logged in');  sub handler {
     my $end_page =       my $r = shift;
         &Apache::loncommon::end_page();      my $londocroot = $r->dir_config('lonDocRoot');
             my $dest = '/adm/roles';      my $form;
             if ($env{'form.firsturl'} ne '') {  # Are we re-routing?
                 $dest = $env{'form.firsturl'};      if (-e "$londocroot/lon-status/reroute.txt") {
             }   &reroute($r);
             $r->print(   return OK;
                $start_page      }
               .'<p class="LC_warning">'.&mt('You are already logged in!').'</p>'  
               .'<p>'.&mt('Please either [_1]continue the current session[_2] or [_3]log out[_4].'      &Apache::lonlocal::get_language_handle($r);
                     ,'<a href="'.$dest.'">','</a>','<a href="/adm/logout">','</a>')  
               .'</p>'  # -------------------------------- Prevent users from attempting to login twice
               .$end_page      my $handle = &Apache::lonnet::check_for_valid_session($r);
             );      if ($handle ne '') {
             return OK;          my $lonidsdir=$r->dir_config('lonIDsDir');
         }          if ($handle=~/^publicuser\_/) {
     }  # For "public user" - remove it, we apparently really want to login
               unlink($r->dir_config('lonIDsDir')."/$handle.id");
 # ---------------------------------------------------- No valid token, continue          } else {
   # Indeed, a valid token is found
               &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);
     my $buffer;      &Apache::loncommon::content_type($r,'text/html');
     if ($r->header_in('Content-length') > 0) {      $r->send_http_header;
  $r->read($buffer,$r->header_in('Content-length'),0);      my $start_page =
     }          &Apache::loncommon::start_page('Already logged in');
     my %form;      my $end_page =
     foreach my $pair (split(/&/,$buffer)) {          &Apache::loncommon::end_page();
        my ($name,$value) = split(/=/,$pair);              my $dest = '/adm/roles';
        $value =~ tr/+/ /;              if ($env{'form.firsturl'} ne '') {
        $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;                  $dest = $env{'form.firsturl'};
        $form{$name}=$value;              }
     }               $r->print(
                  $start_page
     if ((!$form{'uname'}) || (!$form{'upass0'}) || (!$form{'udom'})) {                .'<p class="LC_warning">'.&mt('You are already logged in!').'</p>'
  &failed($r,'Username, password and domain need to be specified.',                .'<p>'.&mt('Please either [_1]continue the current session[_2] or [_3]log out[_4].'
  \%form);                      ,'<a href="'.$dest.'">','</a>','<a href="/adm/logout">','</a>')
         return OK;                .'</p>'
     }                .$end_page
               );
 # split user logging in and "su"-user              return OK;
           }
     ($form{'uname'},$form{'suname'})=split(/\:/,$form{'uname'});      }
     $form{'uname'} = &LONCAPA::clean_username($form{'uname'});  
     $form{'suname'}= &LONCAPA::clean_username($form{'suname'});  # ---------------------------------------------------- No valid token, continue
     $form{'udom'}  = &LONCAPA::clean_domain(  $form{'udom'});  
   
     my $role   = $r->dir_config('lonRole');      my $buffer;
     my $domain = $r->dir_config('lonDefDomain');      if ($r->header_in('Content-length') > 0) {
     my $prodir = $r->dir_config('lonUsersDir');   $r->read($buffer,$r->header_in('Content-length'),0);
     my $contact_name = &mt('LON-CAPA helpdesk');      }
       my %form;
 # ---------------------------------------- Get the information from login token      foreach my $pair (split(/&/,$buffer)) {
          my ($name,$value) = split(/=/,$pair);
     my $tmpinfo=Apache::lonnet::reply('tmpget:'.$form{'logtoken'},         $value =~ tr/+/ /;
                                       $form{'serverid'});         $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
          $form{$name}=$value;
     if (($tmpinfo=~/^error/) || ($tmpinfo eq 'con_lost') ||       }
         ($tmpinfo eq 'no_such_host')) {  
  &failed($r,'Information needed to verify your login information is missing, inaccessible or expired.',\%form);      if ((!$form{'uname'}) || (!$form{'upass0'}) || (!$form{'udom'})) {
         return OK;   &failed($r,'Username, password and domain need to be specified.',
     } else {   \%form);
  my $reply = &Apache::lonnet::reply('tmpdel:'.$form{'logtoken'},          return OK;
    $form{'serverid'});      }
         if ( $reply ne 'ok' ) {  
             &failed($r,'Session could not be opened.',\%form);  # split user logging in and "su"-user
     &Apache::lonnet::logthis("ERROR got a reply of $reply when trying to contact ". $form{'serverid'}." to get login token");  
     return OK;      ($form{'uname'},$form{'suname'})=split(/\:/,$form{'uname'});
  }      $form{'uname'} = &LONCAPA::clean_username($form{'uname'});
     }      $form{'suname'}= &LONCAPA::clean_username($form{'suname'});
       $form{'udom'}  = &LONCAPA::clean_domain(  $form{'udom'});
     if (!&Apache::lonnet::domain($form{'udom'})) {  
         &failed($r,'The domain you provided is not a valid LON-CAPA domain.',\%form);      my $role   = $r->dir_config('lonRole');
         return OK;      my $domain = $r->dir_config('lonDefDomain');
     }      my $prodir = $r->dir_config('lonUsersDir');
       my $contact_name = &mt('LON-CAPA helpdesk');
     my ($key,$firsturl,$rolestr,$symbstr)=split(/&/,$tmpinfo);  
     if ($rolestr) {  # ---------------------------------------- Get the information from login token
         $rolestr = &unescape($rolestr);  
     }      my $tmpinfo=Apache::lonnet::reply('tmpget:'.$form{'logtoken'},
     if ($symbstr) {                                        $form{'serverid'});
         $symbstr= &unescape($symbstr);  
     }      my %sessiondata;
     if ($rolestr =~ /^role=/) {      if ($form{'iptoken'}) {
         (undef,$form{'role'}) = split('=',$rolestr);          %sessiondata = &Apache::lonnet::tmpget($form{'iptoken'});
     }          my $delete = &Apache::lonnet::tmpdel($form{'iptoken'});
     if ($symbstr =~ /^symb=/) {       }
         (undef,$form{'symb'}) = split('=',$symbstr);  
     }      if (($tmpinfo=~/^error/) || ($tmpinfo eq 'con_lost') ||
           ($tmpinfo eq 'no_such_host')) {
     my $keybin=pack("H16",$key);   &failed($r,'Information needed to verify your login information is missing, inaccessible or expired.',\%form);
           return OK;
     my $cipher;      } else {
     if ($Crypt::DES::VERSION>=2.03) {   my $reply = &Apache::lonnet::reply('tmpdel:'.$form{'logtoken'},
  $cipher=new Crypt::DES $keybin;     $form{'serverid'});
     }          if ( $reply ne 'ok' ) {
     else {              &failed($r,'Session could not be opened.',\%form);
  $cipher=new DES $keybin;      &Apache::lonnet::logthis("ERROR got a reply of $reply when trying to contact ". $form{'serverid'}." to get login token");
     }      return OK;
     my $upass='';   }
     for (my $i=0;$i<=2;$i++) {      }
  my $chunk=  
     $cipher->decrypt(unpack("a8",pack("H16",substr($form{'upass'.$i},0,16))));      if (!&Apache::lonnet::domain($form{'udom'})) {
           &failed($r,'The domain you provided is not a valid LON-CAPA domain.',\%form);
  $chunk.=          return OK;
     $cipher->decrypt(unpack("a8",pack("H16",substr($form{'upass'.$i},16,16))));      }
   
  $chunk=substr($chunk,1,ord(substr($chunk,0,1)));      my ($key,$firsturl,$rolestr,$symbstr)=split(/&/,$tmpinfo);
  $upass.=$chunk;      if ($rolestr) {
     }          $rolestr = &unescape($rolestr);
       }
 # ---------------------------------------------------------------- Authenticate      if ($symbstr) {
           $symbstr= &unescape($symbstr);
     my %domconfig = &Apache::lonnet::get_dom('configuration',['usercreation'],$form{'udom'});      }
     my ($cancreate,$statustocreate) =      if ($rolestr =~ /^role=/) {
         &Apache::createaccount::get_creation_controls($form{'udom'},$domconfig{'usercreation'});          (undef,$form{'role'}) = split('=',$rolestr);
     my $defaultauth;      }
     if (ref($cancreate) eq 'ARRAY') {      if ($symbstr =~ /^symb=/) {
         if (grep(/^login$/,@{$cancreate})) {          (undef,$form{'symb'}) = split('=',$symbstr);
             $defaultauth = 1;      }
         }  
     }      my $upass = $ENV{HTTPS} ? join("", @form{qw(upass0 upass1 upass2)})
     my $clientcancheckhost = 1;          : decrypt($key, @form{qw(upass0 upass1 upass2)});
     my $authhost=Apache::lonnet::authenticate($form{'uname'},$upass,  
                                               $form{'udom'},$defaultauth,  # ---------------------------------------------------------------- Authenticate
                                               $clientcancheckhost);  
           my %domconfig = &Apache::lonnet::get_dom('configuration',['usercreation'],$form{'udom'});
 # --------------------------------------------------------------------- Failed?      my ($cancreate,$statustocreate) =
           &Apache::createaccount::get_creation_controls($form{'udom'},$domconfig{'usercreation'});
     if ($authhost eq 'no_host') {      my $defaultauth;
  &failed($r,'Username and/or password could not be authenticated.',      if (ref($cancreate) eq 'ARRAY') {
  \%form);          if (grep(/^login$/,@{$cancreate})) {
         return OK;              $defaultauth = 1;
     } elsif ($authhost eq 'no_account_on_host') {          }
         if ($defaultauth) {      }
             my $domdesc = &Apache::lonnet::domain($form{'udom'},'description');      my $clientcancheckhost = 1;
             unless (&check_can_host($r,\%form,'no_account_on_host',$domdesc)) {      my $authhost=Apache::lonnet::authenticate($form{'uname'},$upass,
                 return OK;                                                $form{'udom'},$defaultauth,
             }                                                $clientcancheckhost);
             my $start_page =      
                 &Apache::loncommon::start_page('Create a user account in LON-CAPA');  # --------------------------------------------------------------------- Failed?
             my $lonhost = $r->dir_config('lonHostID');  
             my $origmail = $Apache::lonnet::perlvar{'lonSupportEMail'};      if ($authhost eq 'no_host') {
             my $contacts =    &failed($r,'Username and/or password could not be authenticated.',
                 &Apache::loncommon::build_recipient_list(undef,'helpdeskmail',   \%form);
                                                         $form{'udom'},$origmail);          return OK;
             my ($contact_email) = split(',',$contacts);       } elsif ($authhost eq 'no_account_on_host') {
             my $output =           if ($defaultauth) {
                 &Apache::createaccount::username_check($form{'uname'},$form{'udom'},              my $domdesc = &Apache::lonnet::domain($form{'udom'},'description');
                                                        $domdesc,'',$lonhost,              unless (&check_can_host($r,\%form,'no_account_on_host',$domdesc)) {
                                                        $contact_email,$contact_name,                  return OK;
                                                        undef,$statustocreate);              }
             &Apache::loncommon::content_type($r,'text/html');              my $start_page =
             $r->send_http_header;                  &Apache::loncommon::start_page('Create a user account in LON-CAPA');
             &Apache::createaccount::print_header($r,$start_page);              my $lonhost = $r->dir_config('lonHostID');
             $r->print('<h3>'.&mt('Account creation').'</h3>'.              my $origmail = $Apache::lonnet::perlvar{'lonSupportEMail'};
                       &mt('Although your username and password were authenticated, you do not currently have a LON-CAPA account at this institution.').'<br />'.              my $contacts =
                       $output.&Apache::loncommon::end_page());                  &Apache::loncommon::build_recipient_list(undef,'helpdeskmail',
             return OK;                                                          $form{'udom'},$origmail);
         } else {              my ($contact_email) = split(',',$contacts);
             &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 $output =
             return OK;                  &Apache::createaccount::username_check($form{'uname'},$form{'udom'},
         }                                                         $domdesc,'',$lonhost,
     }                                                         $contact_email,$contact_name,
                                                          undef,$statustocreate);
     if (($firsturl eq '') ||               &Apache::loncommon::content_type($r,'text/html');
  ($firsturl=~/^\/adm\/(logout|remote)/)) {              $r->send_http_header;
  $firsturl='/adm/roles';              &Apache::createaccount::print_header($r,$start_page);
     }              $r->print('<h3>'.&mt('Account creation').'</h3>'.
 # --------------------------------- Are we attempting to login as somebody else?                        &mt('Although your username and password were authenticated, you do not currently have a LON-CAPA account at this institution.').'<br />'.
     if ($form{'suname'}) {                        $output.&Apache::loncommon::end_page());
 # ------------ see if the original user has enough privileges to pull this stunt              return OK;
  if (&Apache::lonnet::privileged($form{'uname'},$form{'udom'})) {          } else {
 # ---------------------------------------------------- see if the su-user exists              &failed($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);
     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  
  unless (&Apache::lonnet::privileged($form{'suname'},$form{'udom'})) {      if (($firsturl eq '') ||
 # -------------------------------------------------------- actually switch users   ($firsturl=~/^\/adm\/(logout|remote)/)) {
     &Apache::lonnet::logperm('User '.$form{'uname'}.' at '.$form{'udom'}.   $firsturl='/adm/roles';
  ' logging in as '.$form{'suname'});      }
     $form{'uname'}=$form{'suname'};  
  } else {      my $hosthere;
     &Apache::lonnet::logthis('Attempted switch user to privileged user');      if ($form{'iptoken'}) {
  }          if (($sessiondata{'domain'} eq $form{'udom'}) &&
     }              ($sessiondata{'username'} eq $form{'uname'})) {
  } else {              $hosthere = 1;
     &Apache::lonnet::logthis('Non-privileged user attempting switch user');          }
  }      }
     }  
   # --------------------------------- Are we attempting to login as somebody else?
     my ($is_balancer,$otherserver) =       if ($form{'suname'}) {
         &Apache::lonnet::check_loadbalancing($form{'uname'},$form{'udom'});  # ------------ see if the original user has enough privileges to pull this stunt
    if (&Apache::lonnet::privileged($form{'uname'},$form{'udom'})) {
     if ($is_balancer) {  # ---------------------------------------------------- see if the su-user exists
         if (!$otherserver) {       unless (&Apache::lonnet::homeserver($form{'suname'},$form{'udom'})
             ($otherserver) = &Apache::lonnet::choose_server($form{'udom'});   eq 'no_host') {
         }   &Apache::lonnet::logthis(&Apache::lonnet::homeserver($form{'suname'},$form{'udom'}));
         if ($otherserver) {  # ------------------------------ see if the su-user is not too highly privileged
             &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef,   unless (&Apache::lonnet::privileged($form{'suname'},$form{'udom'})) {
                      \%form);  # -------------------------------------------------------- actually switch users
     $r->internal_redirect('/adm/switchserver?otherserver='.$otherserver.'&origurl='.$firsturl);      &Apache::lonnet::logperm('User '.$form{'uname'}.' at '.$form{'udom'}.
         } else {   ' logging in as '.$form{'suname'});
             $r->print(&noswitch());      $form{'uname'}=$form{'suname'};
         }   } else {
         return OK;      &Apache::lonnet::logthis('Attempted switch user to privileged user');
     } else {   }
         if (!&check_can_host($r,\%form,$authhost)) {      }
             my ($otherserver) = &Apache::lonnet::choose_server($form{'udom'});   } else {
             if ($otherserver) {      &Apache::lonnet::logthis('Non-privileged user attempting switch user');
                 &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef,   }
                          \%form);      }
                 $r->internal_redirect('/adm/switchserver?otherserver='.$otherserver.'&origurl='.$firsturl);  
             } else {      my ($is_balancer,$otherserver);
                 $r->print(&noswitch());  
             }      unless ($hosthere) {
             return OK;          ($is_balancer,$otherserver) =
         }              &Apache::lonnet::check_loadbalancing($form{'uname'},$form{'udom'});
       }
 # ------------------------------------------------------- Do the load balancing  
       if ($is_balancer) {
 # ---------------------------------------------------------- Determine own load          if (!$otherserver) {
         my $loadlim = $r->dir_config('lonLoadLim');              ($otherserver) = &Apache::lonnet::choose_server($form{'udom'});
         my $loadavg;          }
         {          if ($otherserver) {
             my $loadfile=Apache::File->new('/proc/loadavg');              &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef,
             $loadavg=<$loadfile>;                       \%form);
         }              my $switchto = '/adm/switchserver?otherserver='.$otherserver;
         $loadavg =~ s/\s.*//g;              if (($firsturl) && ($firsturl ne '/adm/switchserver') && ($firsturl ne '/adm/roles')) {
         my $loadpercent=sprintf("%.1f",100*$loadavg/$loadlim);                  $switchto .= '&origurl='.$firsturl;
         my $userloadpercent=&Apache::lonnet::userload();              }
               if ($form{'role'}) {
 # ---------------------------------------------------------- Are we overloaded?                  $switchto .= '&role='.$form{'role'};
         if ((($userloadpercent>100.0)||($loadpercent>100.0))) {              }
             my $unloaded=Apache::lonnet::spareserver($loadpercent,$userloadpercent,1,$form{'udom'});              if ($form{'symb'}) {
             if (!$unloaded) {                  $switchto .= '&symb='.$form{'symb'};
                 ($unloaded) = &Apache::lonnet::choose_server($form{'udom'});              }
             }              $r->internal_redirect($switchto);
             if ($unloaded) {          } else {
                 &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',              $r->print(&noswitch());
                          undef,\%form);          }
                 $r->internal_redirect('/adm/switchserver?otherserver='.$unloaded.'&origurl='.$firsturl);          return OK;
                 return OK;      } else {
             }          if (!&check_can_host($r,\%form,$authhost)) {
         }              my ($otherserver) = &Apache::lonnet::choose_server($form{'udom'});
         &success($r,$form{'uname'},$form{'udom'},$authhost,$firsturl,undef,              if ($otherserver) {
                  \%form);                  &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef,
         return OK;                           \%form);
     }                  my $switchto = '/adm/switchserver?otherserver='.$otherserver;
 }                  if (($firsturl) && ($firsturl ne '/adm/switchserver') && ($firsturl ne '/adm/roles')) {
                       $switchto .= '&origurl='.$firsturl;
 sub check_can_host {                  }
     my ($r,$form,$authhost,$domdesc) = @_;                  if ($form{'role'}) {
     return unless (ref($form) eq 'HASH');                      $switchto .= '&role='.$form{'role'};
     my $canhost = 1;                  }
     my $lonhost = $r->dir_config('lonHostID');                  if ($form{'symb'}) {
     my $udom = $form->{'udom'};                      $switchto .= '&symb='.$form{'symb'};
     my @intdoms;                  }
     my $internet_names = &Apache::lonnet::get_internet_names($lonhost);                  $r->internal_redirect($switchto);
     if (ref($internet_names) eq 'ARRAY') {              } else {
         @intdoms = @{$internet_names};                  $r->print(&noswitch());
     }              }
     my $uprimary_id = &Apache::lonnet::domain($udom,'primary');              return OK;
     my $uint_dom = &Apache::lonnet::internet_dom($uprimary_id);          }
     unless ($uint_dom ne '' && grep(/^\Q$uint_dom\E$/,@intdoms)) {  
         my $machine_dom = &Apache::lonnet::host_domain($lonhost);  # ------------------------------------------------------- Do the load balancing
         my $hostname = &Apache::lonnet::hostname($lonhost);  
         my $serverhomeID = &Apache::lonnet::get_server_homeID($hostname);  # ---------------------------------------------------------- Determine own load
         my $serverhomedom = &Apache::lonnet::host_domain($serverhomeID);          my $loadlim = $r->dir_config('lonLoadLim');
         my %defdomdefaults = &Apache::lonnet::get_domain_defaults($serverhomedom);          my $loadavg;
         my %udomdefaults = &Apache::lonnet::get_domain_defaults($udom);          {
         my $loncaparev;              my $loadfile=Apache::File->new('/proc/loadavg');
         if ($authhost eq 'no_account_on_host') {              $loadavg=<$loadfile>;
             $loncaparev = &Apache::lonnet::get_server_loncaparev($machine_dom);          }
         } else {          $loadavg =~ s/\s.*//g;
             $loncaparev = &Apache::lonnet::get_server_loncaparev($machine_dom,$lonhost);          my $loadpercent=sprintf("%.1f",100*$loadavg/$loadlim);
         }          my $userloadpercent=&Apache::lonnet::userload();
         $canhost = &Apache::lonnet::can_host_session($udom,$lonhost,$loncaparev,  
                                                      $udomdefaults{'remotesessions'},  # ---------------------------------------------------------- Are we overloaded?
                                                      $defdomdefaults{'hostedsessions'});          if ((($userloadpercent>100.0)||($loadpercent>100.0))) {
     }              my $unloaded=Apache::lonnet::spareserver($loadpercent,$userloadpercent,1,$form{'udom'});
     unless ($canhost) {              if (!$unloaded) {
         if ($authhost eq 'no_account_on_host') {                  ($unloaded) = &Apache::lonnet::choose_server($form{'udom'});
             my $checkloginvia = 1;              }
             my ($login_host,$hostname) =               if ($unloaded) {
                 &Apache::lonnet::choose_server($udom,$checkloginvia);                  &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',
             &Apache::loncommon::content_type($r,'text/html');                           undef,\%form);
             $r->send_http_header;                  $r->internal_redirect('/adm/switchserver?otherserver='.$unloaded.'&origurl='.$firsturl);
             if ($login_host ne '') {                  return OK;
                 my $protocol = $Apache::lonnet::protocol{$login_host};              }
                 $protocol = 'http' if ($protocol ne 'https');          }
                 my $newurl = $protocol.'://'.$hostname.'/adm/createaccount';          &success($r,$form{'uname'},$form{'udom'},$authhost,$firsturl,undef,
                 $r->print(&Apache::loncommon::start_page('Create a user account in LON-CAPA').                   \%form);
                           '<h3>'.&mt('Account creation').'</h3>'.          return OK;
                           &mt('You do not currently have a LON-CAPA account at this institution.').'<br />'.      }
                           '<p>'.&mt('You will be able to create one by logging into a LON-CAPA server within the [_1] domain.',$domdesc).'</p>'.  }
                           '<p>'.&mt('[_1]Log in[_2]','<a href="'.$newurl.'">','</a>').  
                           &Apache::loncommon::end_page());  sub decrypt {
             } else {      my ($key, @chunks) = @_;
                 $r->print(&Apache::loncommon::start_page('Access to LON-CAPA unavailable').  
                           '<h3>'.&mt('Account creation unavailable').'</h3>'.      my $keybin = pack("H16",$key);
                           &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>'.      my $cipher;
                           &Apache::loncommon::end_page());      if ($Crypt::DES::VERSION >= 2.03) {
             }          $cipher = new Crypt::DES $keybin;
         } else {      } else {
             &success($r,$form->{'uname'},$udom,$authhost,'noredirect',undef,          $cipher = new DES $keybin;
                      $form);      }
             my ($otherserver) = &Apache::lonnet::choose_server($udom);  
             $r->internal_redirect('/adm/switchserver?otherserver='.$otherserver);      my $upass='';
         }      for (my $i=0;$i<=2;$i++) {
     }          my $chunk =
     return $canhost;              $cipher->decrypt(
 }                  unpack("a8",pack("H16",substr($chunks[$i],0,16))));
   
 sub noswitch {          $chunk .=
     my $result = &Apache::loncommon::start_page('Access to LON-CAPA unavailable').              $cipher->decrypt(
                  '<h3>'.&mt('Session unavailable').'</h3>'.                  unpack("a8",pack("H16",substr($chunks[$i],16,16))));
                  &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>'.          $chunk = substr($chunk,1,ord(substr($chunk,0,1)));
                  &Apache::loncommon::end_page();          $upass .= $chunk;
     return $result;      }
 }      return $upass;
   }
 sub loginhelpdisplay {  
     my ($authdomain) = @_;  sub check_can_host {
     my $login_help = 1;      my ($r,$form,$authhost,$domdesc) = @_;
     my $lang = &Apache::lonlocal::current_language();      return unless (ref($form) eq 'HASH');
     if ($login_help) {      my $canhost = 1;
         my $dom = $authdomain;      my $lonhost = $r->dir_config('lonHostID');
         if ($dom eq '') {      my $udom = $form->{'udom'};
             $dom = &Apache::lonnet::default_login_domain();      my @intdoms;
         }      my $internet_names = &Apache::lonnet::get_internet_names($lonhost);
         my %domconfhash = &Apache::loncommon::get_domainconf($dom);      if (ref($internet_names) eq 'ARRAY') {
         my $loginhelp_url;          @intdoms = @{$internet_names};
         if ($lang) {      }
             $loginhelp_url = $domconfhash{$dom.'.login.helpurl_'.$lang};      my $uprimary_id = &Apache::lonnet::domain($udom,'primary');
             if ($loginhelp_url ne '') {      my $uint_dom = &Apache::lonnet::internet_dom($uprimary_id);
                 return $loginhelp_url;      unless ($uint_dom ne '' && grep(/^\Q$uint_dom\E$/,@intdoms)) {
             }          my $machine_dom = &Apache::lonnet::host_domain($lonhost);
         }          my $hostname = &Apache::lonnet::hostname($lonhost);
         $loginhelp_url = $domconfhash{$dom.'.login.helpurl_nolang'};          my $serverhomeID = &Apache::lonnet::get_server_homeID($hostname);
         if ($loginhelp_url ne '') {          my $serverhomedom = &Apache::lonnet::host_domain($serverhomeID);
             return $loginhelp_url;          my %defdomdefaults = &Apache::lonnet::get_domain_defaults($serverhomedom);
         } else {          my %udomdefaults = &Apache::lonnet::get_domain_defaults($udom);
             return '/adm/loginproblems.html';          my $loncaparev;
         }          if ($authhost eq 'no_account_on_host') {
     }              $loncaparev = &Apache::lonnet::get_server_loncaparev($machine_dom);
     return;          } else {
 }              $loncaparev = &Apache::lonnet::get_server_loncaparev($machine_dom,$lonhost);
           }
 1;          $canhost = &Apache::lonnet::can_host_session($udom,$lonhost,$loncaparev,
 __END__                                                       $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.1.136

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