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Diff for /loncom/auth/lonauth.pm between versions 1.121.2.6 and 1.136

version 1.121.2.6, 2013/09/29 19:31:03 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 $windowinfo=&Apache::lonmenu::open($env{'browser.os'});      my $windowinfo = Apache::lonhtmlcommon::scripttag('self.name="loncapaclient";');
     my $startupremote=&Apache::lonmenu::startupremote($destination);      my $header = '<meta HTTP-EQUIV="Refresh" CONTENT="0; url='.$destination.'" />';
     my $remoteinfo=&Apache::lonmenu::load_remote_msg($lowerurl);      my $brcrum = [{'href' => '',
     my $setflags=&Apache::lonmenu::setflags();                     'text' => 'Successful Login'},];
     my $maincall=&Apache::lonmenu::maincall();      my $start_page=&Apache::loncommon::start_page('Successful Login',
     my $brcrum = [{'href' => '',                                                    $header,
                    'text' => 'Successful Login'},];                                                    {'bread_crumbs' => $brcrum,});
     my $start_page=&Apache::loncommon::start_page('Successful Login',      my $end_page  =&Apache::loncommon::end_page();
                                                   $startupremote,  
                                                   {'no_inline_link' => 1,   my $continuelink='<a href="'.$destination.'">'.&mt('Continue').'</a>';
                                                    'bread_crumbs' => $brcrum,});  # ------------------------------------------------- Output for successful login
     my $end_page  =&Apache::loncommon::end_page();  
       &Apache::loncommon::content_type($r,'text/html');
     my $continuelink;      $r->header_out('Set-cookie' => $cookie);
     if ($env{'environment.remote'} eq 'off') {      $r->send_http_header;
  $continuelink='<a href="'.$destination.'">'.&mt('Continue').'</a>';  
     }      my %lt=&Apache::lonlocal::texthash(
 # ------------------------------------------------- Output for successful login         'wel' => 'Welcome',
          'pro' => 'Login problems?',
     &Apache::loncommon::content_type($r,'text/html');         );
     $r->header_out('Set-cookie' => $cookie);      my $loginhelp = &loginhelpdisplay($domain);
     $r->send_http_header;      if ($loginhelp) {
           $loginhelp = '<p><a href="'.$loginhelp.'">'.$lt{'pro'}.'</a></p>';
     my %lt=&Apache::lonlocal::texthash(      }
        'wel' => 'Welcome',  
        'pro' => 'Login problems?',      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);
     my $loginhelp = &loginhelpdisplay($domain);  $start_page
     if ($loginhelp) {  $windowinfo
         $loginhelp = '<p><a href="'.$loginhelp.'">'.$lt{'pro'}.'</a></p>';  <h1>$lt{'wel'}</h1>
     }  $welcome
   $loginhelp
     my $welcome = &mt('Welcome to the Learning[_1]Online[_2] Network with CAPA. Please wait while your session is being set up.','<i>','</i>');   $continuelink
     $r->print(<<ENDSUCCESS);  $end_page
 $start_page  ENDSUCCESS
 $setflags      return;
 $windowinfo  }
 <h1>$lt{'wel'}</h1>  
 $welcome  # --------------------------------------------------------------- Failed login!
 $loginhelp  
 $remoteinfo  sub failed {
 $maincall      my ($r,$message,$form) = @_;
 $continuelink      (undef,undef,undef,my $clientmathml,my $clientunicode) =
 $end_page          &Apache::loncommon::decode_user_agent();
 ENDSUCCESS      my $args = {};
 }      if ($clientunicode && !$clientmathml) {
           $args = {'browser.unicode' => 1};
 # --------------------------------------------------------------- Failed login!      }
   
 sub failed {      my $start_page = &Apache::loncommon::start_page('Unsuccessful Login',undef,$args);
     my ($r,$message,$form) = @_;      my $uname = &Apache::loncommon::cleanup_html($form->{'uname'});
     my $start_page = &Apache::loncommon::start_page('Unsuccessful Login',undef);      my $udom = &Apache::loncommon::cleanup_html($form->{'udom'});
     my $retry = '/adm/login?username='.$form->{'uname'}.      if (&Apache::lonnet::domain($udom,'description') eq '') {
                 '&domain='.$form->{'udom'};          undef($udom);
     if (exists($form->{role})) {      }
         $retry .= '&role='.$form->{role};      my $retry = '/adm/login';
     }      if ($uname eq $form->{'uname'}) {
     if (exists($form->{symb})) {          $retry .= '?username='.$uname;
         $retry .= '&symb='.$form->{symb};      }
     }      if ($udom) {
     my $end_page   = &Apache::loncommon::end_page();          $retry .= (($retry=~/\?/)?'&amp;':'?').'domain='.$udom;
     &Apache::loncommon::content_type($r,'text/html');      }
     $r->send_http_header;      if (exists($form->{role})) {
     my $loginhelp = &loginhelpdisplay($form->{'udom'});          my $role = &Apache::loncommon::cleanup_html($form->{role});
     if ($loginhelp) {          if ($role ne '') {
         $loginhelp = '<p><a href="'.$loginhelp.'">'.&mt('Login problems?').'</a></p>';              $retry .= (($retry=~/\?/)?'&amp;':'?').'role='.$role;
     }          }
       }
     $r->print(      if (exists($form->{symb})) {
        $start_page          my $symb = &Apache::loncommon::cleanup_html($form->{symb});
       .'<h1>'.&mt('Sorry ...').'</h1>'          if ($symb ne '') {
       .'<p class="LC_warning">'.&mt($message).'</p>'              $retry .= (($retry=~/\?/)?'&amp;':'?').'symb='.$symb;
       .'<p>'.&mt('Please [_1]log in again[_2].','<a href="'.$retry.'">','</a>')          }
       .'</p>'      }
       .$loginhelp      my $end_page = &Apache::loncommon::end_page();
       .$end_page      &Apache::loncommon::content_type($r,'text/html');
     );      $r->send_http_header;
  }      my @actions =
            (&mt('Please [_1]log in again[_2].','<a href="'.$retry.'">','</a>'));
 # ------------------------------------------------------------------ Rerouting!      my $loginhelp = &loginhelpdisplay($udom);
       if ($loginhelp) {
 sub reroute {          push(@actions, '<a href="'.$loginhelp.'">'.&mt('Login problems?').'</a>');
     my ($r) = @_;      }
     &Apache::loncommon::content_type($r,'text/html');      #FIXME: link to helpdesk might be added here
     $r->send_http_header;  
     my $msg='<b>'.&mt('Sorry ...').'</b><br />'      $r->print(
            .&mt('Please [_1]log in again[_2].');         $start_page
     &Apache::loncommon::simple_error_page($r,'Rerouting',$msg,{'no_auto_mt_msg' => 1});        .'<h2>'.&mt('Sorry ...').'</h2>'
 }        .&Apache::lonhtmlcommon::confirm_success(&mt($message),1).'<br /><br />'
         .&Apache::lonhtmlcommon::actionbox(\@actions)
 # ---------------------------------------------------------------- Main handler        .$end_page
       );
 sub handler {   }
     my $r = shift;  
     my $londocroot = $r->dir_config('lonDocRoot');  # ------------------------------------------------------------------ Rerouting!
     my $form;  
 # Are we re-routing?  sub reroute {
     if (-e "$londocroot/lon-status/reroute.txt") {      my ($r) = @_;
  &reroute($r);      &Apache::loncommon::content_type($r,'text/html');
  return OK;      $r->send_http_header;
     }      my $msg='<b>'.&mt('Sorry ...').'</b><br />'
              .&mt('Please [_1]log in again[_2].');
     &Apache::lonlocal::get_language_handle($r);      &Apache::loncommon::simple_error_page($r,'Rerouting',$msg,{'no_auto_mt_msg' => 1});
   }
 # -------------------------------- Prevent users from attempting to login twice  
     my $handle = &Apache::lonnet::check_for_valid_session($r);  # ---------------------------------------------------------------- Main handler
     if ($handle ne '') {  
         my $lonidsdir=$r->dir_config('lonIDsDir');  sub handler {
         if ($handle=~/^publicuser\_/) {      my $r = shift;
 # For "public user" - remove it, we apparently really want to login      my $londocroot = $r->dir_config('lonDocRoot');
             unlink($r->dir_config('lonIDsDir')."/$handle.id");      my $form;
         } else {  # Are we re-routing?
 # Indeed, a valid token is found      if (-e "$londocroot/lon-status/reroute.txt") {
             &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);   &reroute($r);
     &Apache::loncommon::content_type($r,'text/html');   return OK;
     $r->send_http_header;      }
     my $start_page =   
         &Apache::loncommon::start_page('Already logged in');      &Apache::lonlocal::get_language_handle($r);
     my $end_page =   
         &Apache::loncommon::end_page();  # -------------------------------- Prevent users from attempting to login twice
             my $dest = '/adm/roles';      my $handle = &Apache::lonnet::check_for_valid_session($r);
             if ($env{'form.firsturl'} ne '') {      if ($handle ne '') {
                 $dest = $env{'form.firsturl'};          my $lonidsdir=$r->dir_config('lonIDsDir');
             }          if ($handle=~/^publicuser\_/) {
             $r->print(  # For "public user" - remove it, we apparently really want to login
                $start_page              unlink($r->dir_config('lonIDsDir')."/$handle.id");
               .'<p class="LC_warning">'.&mt('You are already logged in!').'</p>'          } else {
               .'<p>'.&mt('Please either [_1]continue the current session[_2] or [_3]log out[_4].'  # Indeed, a valid token is found
                     ,'<a href="'.$dest.'">','</a>','<a href="/adm/logout">','</a>')              &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);
               .'</p>'      &Apache::loncommon::content_type($r,'text/html');
               .$end_page      $r->send_http_header;
             );      my $start_page =
             return OK;          &Apache::loncommon::start_page('Already logged in');
         }      my $end_page =
     }          &Apache::loncommon::end_page();
               my $dest = '/adm/roles';
 # ---------------------------------------------------- No valid token, continue              if ($env{'form.firsturl'} ne '') {
                   $dest = $env{'form.firsturl'};
               }
     my $buffer;              $r->print(
     if ($r->header_in('Content-length') > 0) {                 $start_page
  $r->read($buffer,$r->header_in('Content-length'),0);                .'<p class="LC_warning">'.&mt('You are already logged in!').'</p>'
     }                .'<p>'.&mt('Please either [_1]continue the current session[_2] or [_3]log out[_4].'
     my %form;                      ,'<a href="'.$dest.'">','</a>','<a href="/adm/logout">','</a>')
     foreach my $pair (split(/&/,$buffer)) {                .'</p>'
        my ($name,$value) = split(/=/,$pair);                .$end_page
        $value =~ tr/+/ /;              );
        $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;              return OK;
        $form{$name}=$value;          }
     }      }
   
     if ((!$form{'uname'}) || (!$form{'upass0'}) || (!$form{'udom'})) {  # ---------------------------------------------------- No valid token, continue
  &failed($r,'Username, password and domain need to be specified.',  
  \%form);  
         return OK;      my $buffer;
     }      if ($r->header_in('Content-length') > 0) {
    $r->read($buffer,$r->header_in('Content-length'),0);
 # split user logging in and "su"-user      }
       my %form;
     ($form{'uname'},$form{'suname'})=split(/\:/,$form{'uname'});      foreach my $pair (split(/&/,$buffer)) {
     $form{'uname'} = &LONCAPA::clean_username($form{'uname'});         my ($name,$value) = split(/=/,$pair);
     $form{'suname'}= &LONCAPA::clean_username($form{'suname'});         $value =~ tr/+/ /;
     $form{'udom'}  = &LONCAPA::clean_domain(  $form{'udom'});         $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
          $form{$name}=$value;
     my $role   = $r->dir_config('lonRole');      }
     my $domain = $r->dir_config('lonDefDomain');  
     my $prodir = $r->dir_config('lonUsersDir');      if ((!$form{'uname'}) || (!$form{'upass0'}) || (!$form{'udom'})) {
     my $contact_name = &mt('LON-CAPA helpdesk');   &failed($r,'Username, password and domain need to be specified.',
    \%form);
 # ---------------------------------------- Get the information from login token          return OK;
       }
     my $tmpinfo=Apache::lonnet::reply('tmpget:'.$form{'logtoken'},  
                                       $form{'serverid'});  # split user logging in and "su"-user
     my %sessiondata;  
     if ($form{'iptoken'}) {      ($form{'uname'},$form{'suname'})=split(/\:/,$form{'uname'});
         %sessiondata = &Apache::lonnet::tmpget($form{'iptoken'});      $form{'uname'} = &LONCAPA::clean_username($form{'uname'});
         my $delete = &Apache::lonnet::tmpdel($form{'token'});      $form{'suname'}= &LONCAPA::clean_username($form{'suname'});
     }      $form{'udom'}  = &LONCAPA::clean_domain(  $form{'udom'});
   
     if (($tmpinfo=~/^error/) || ($tmpinfo eq 'con_lost') ||       my $role   = $r->dir_config('lonRole');
         ($tmpinfo eq 'no_such_host')) {      my $domain = $r->dir_config('lonDefDomain');
  &failed($r,'Information needed to verify your login information is missing, inaccessible or expired.',\%form);      my $prodir = $r->dir_config('lonUsersDir');
         return OK;      my $contact_name = &mt('LON-CAPA helpdesk');
     } else {  
  my $reply = &Apache::lonnet::reply('tmpdel:'.$form{'logtoken'},  # ---------------------------------------- Get the information from login token
    $form{'serverid'});  
         if ( $reply ne 'ok' ) {      my $tmpinfo=Apache::lonnet::reply('tmpget:'.$form{'logtoken'},
             &failed($r,'Session could not be opened.',\%form);                                        $form{'serverid'});
     &Apache::lonnet::logthis("ERROR got a reply of $reply when trying to contact ". $form{'serverid'}." to get login token");  
     return OK;      my %sessiondata;
  }      if ($form{'iptoken'}) {
     }          %sessiondata = &Apache::lonnet::tmpget($form{'iptoken'});
           my $delete = &Apache::lonnet::tmpdel($form{'iptoken'});
     if (!&Apache::lonnet::domain($form{'udom'})) {      }
         &failed($r,'The domain you provided is not a valid LON-CAPA domain.',\%form);  
         return OK;      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);
     my ($key,$firsturl,$rolestr,$symbstr)=split(/&/,$tmpinfo);          return OK;
     if ($rolestr) {      } else {
         $rolestr = &unescape($rolestr);   my $reply = &Apache::lonnet::reply('tmpdel:'.$form{'logtoken'},
     }     $form{'serverid'});
     if ($symbstr) {          if ( $reply ne 'ok' ) {
         $symbstr= &unescape($symbstr);              &failed($r,'Session could not be opened.',\%form);
     }      &Apache::lonnet::logthis("ERROR got a reply of $reply when trying to contact ". $form{'serverid'}." to get login token");
     if ($rolestr =~ /^role=/) {      return OK;
         (undef,$form{'role'}) = split('=',$rolestr);   }
     }      }
     if ($symbstr =~ /^symb=/) {   
         (undef,$form{'symb'}) = split('=',$symbstr);      if (!&Apache::lonnet::domain($form{'udom'})) {
     }          &failed($r,'The domain you provided is not a valid LON-CAPA domain.',\%form);
           return OK;
     my $keybin=pack("H16",$key);      }
   
     my $cipher;      my ($key,$firsturl,$rolestr,$symbstr)=split(/&/,$tmpinfo);
     if ($Crypt::DES::VERSION>=2.03) {      if ($rolestr) {
  $cipher=new Crypt::DES $keybin;          $rolestr = &unescape($rolestr);
     }      }
     else {      if ($symbstr) {
  $cipher=new DES $keybin;          $symbstr= &unescape($symbstr);
     }      }
     my $upass='';      if ($rolestr =~ /^role=/) {
     for (my $i=0;$i<=2;$i++) {          (undef,$form{'role'}) = split('=',$rolestr);
  my $chunk=      }
     $cipher->decrypt(unpack("a8",pack("H16",substr($form{'upass'.$i},0,16))));      if ($symbstr =~ /^symb=/) {
           (undef,$form{'symb'}) = split('=',$symbstr);
  $chunk.=      }
     $cipher->decrypt(unpack("a8",pack("H16",substr($form{'upass'.$i},16,16))));  
       my $upass = $ENV{HTTPS} ? join("", @form{qw(upass0 upass1 upass2)})
  $chunk=substr($chunk,1,ord(substr($chunk,0,1)));          : decrypt($key, @form{qw(upass0 upass1 upass2)});
  $upass.=$chunk;  
     }  # ---------------------------------------------------------------- Authenticate
   
 # ---------------------------------------------------------------- Authenticate      my %domconfig = &Apache::lonnet::get_dom('configuration',['usercreation'],$form{'udom'});
       my ($cancreate,$statustocreate) =
     my %domconfig = &Apache::lonnet::get_dom('configuration',['usercreation'],$form{'udom'});          &Apache::createaccount::get_creation_controls($form{'udom'},$domconfig{'usercreation'});
     my ($cancreate,$statustocreate) =      my $defaultauth;
         &Apache::createaccount::get_creation_controls($form{'udom'},$domconfig{'usercreation'});      if (ref($cancreate) eq 'ARRAY') {
     my $defaultauth;          if (grep(/^login$/,@{$cancreate})) {
     if (ref($cancreate) eq 'ARRAY') {              $defaultauth = 1;
         if (grep(/^login$/,@{$cancreate})) {          }
             $defaultauth = 1;      }
         }      my $clientcancheckhost = 1;
     }      my $authhost=Apache::lonnet::authenticate($form{'uname'},$upass,
     my $clientcancheckhost = 1;                                                $form{'udom'},$defaultauth,
     my $authhost=Apache::lonnet::authenticate($form{'uname'},$upass,                                                $clientcancheckhost);
                                               $form{'udom'},$defaultauth,     
                                               $clientcancheckhost);  # --------------------------------------------------------------------- Failed?
       
 # --------------------------------------------------------------------- Failed?      if ($authhost eq 'no_host') {
    &failed($r,'Username and/or password could not be authenticated.',
     if ($authhost eq 'no_host') {   \%form);
  &failed($r,'Username and/or password could not be authenticated.',          return OK;
  \%form);      } elsif ($authhost eq 'no_account_on_host') {
         return OK;          if ($defaultauth) {
     } elsif ($authhost eq 'no_account_on_host') {              my $domdesc = &Apache::lonnet::domain($form{'udom'},'description');
         if ($defaultauth) {              unless (&check_can_host($r,\%form,'no_account_on_host',$domdesc)) {
             my $domdesc = &Apache::lonnet::domain($form{'udom'},'description');                  return OK;
             unless (&check_can_host($r,\%form,'no_account_on_host',$domdesc)) {              }
                 return OK;              my $start_page =
             }                  &Apache::loncommon::start_page('Create a user account in LON-CAPA');
             my $start_page =               my $lonhost = $r->dir_config('lonHostID');
                 &Apache::loncommon::start_page('Create a user account in LON-CAPA',              my $origmail = $Apache::lonnet::perlvar{'lonSupportEMail'};
                                                '',{'no_inline_link'   => 1,});              my $contacts =
             my $lonhost = $r->dir_config('lonHostID');                  &Apache::loncommon::build_recipient_list(undef,'helpdeskmail',
             my $origmail = $Apache::lonnet::perlvar{'lonSupportEMail'};                                                          $form{'udom'},$origmail);
             my $contacts =               my ($contact_email) = split(',',$contacts);
                 &Apache::loncommon::build_recipient_list(undef,'helpdeskmail',              my $output =
                                                         $form{'udom'},$origmail);                  &Apache::createaccount::username_check($form{'uname'},$form{'udom'},
             my ($contact_email) = split(',',$contacts);                                                          $domdesc,'',$lonhost,
             my $output =                                                          $contact_email,$contact_name,
                 &Apache::createaccount::username_check($form{'uname'},$form{'udom'},                                                         undef,$statustocreate);
                                                        $domdesc,'',$lonhost,              &Apache::loncommon::content_type($r,'text/html');
                                                        $contact_email,$contact_name,              $r->send_http_header;
                                                        undef,$statustocreate);              &Apache::createaccount::print_header($r,$start_page);
             &Apache::loncommon::content_type($r,'text/html');              $r->print('<h3>'.&mt('Account creation').'</h3>'.
             $r->send_http_header;                        &mt('Although your username and password were authenticated, you do not currently have a LON-CAPA account at this institution.').'<br />'.
             &Apache::createaccount::print_header($r,$start_page);                        $output.&Apache::loncommon::end_page());
             $r->print('<h3>'.&mt('Account creation').'</h3>'.              return OK;
                       &mt('Although your username and password were authenticated, you do not currently have a LON-CAPA account at this institution.').'<br />'.          } else {
                       $output.&Apache::loncommon::end_page());              &failed($r,'Although your username and password were authenticated, you do not currently have a LON-CAPA account in this domain, and you are not permitted to create one.',\%form);
             return OK;              return OK;
         } else {          }
             &failed($r,'Although your username and password were authenticated, you do not currently have a LON-CAPA account in this domain, and you are not permitted to create one.',\%form);      }
             return OK;  
         }      if (($firsturl eq '') ||
     }   ($firsturl=~/^\/adm\/(logout|remote)/)) {
    $firsturl='/adm/roles';
     if (($firsturl eq '') ||       }
  ($firsturl=~/^\/adm\/(logout|remote)/)) {  
  $firsturl='/adm/roles';      my $hosthere;
     }      if ($form{'iptoken'}) {
           if (($sessiondata{'domain'} eq $form{'udom'}) &&
     my $hosthere;              ($sessiondata{'username'} eq $form{'uname'})) {
     if ($form{'iptoken'}) {              $hosthere = 1;
         if (($sessiondata{'domain'} eq $form{'udom'}) &&          }
             ($sessiondata{'username'} eq $form{'uname'})) {      }
             $hosthere = 1;  
         }  # --------------------------------- Are we attempting to login as somebody else?
     }      if ($form{'suname'}) {
   # ------------ see if the original user has enough privileges to pull this stunt
 # --------------------------------- Are we attempting to login as somebody else?   if (&Apache::lonnet::privileged($form{'uname'},$form{'udom'})) {
     if ($form{'suname'}) {  # ---------------------------------------------------- see if the su-user exists
 # ------------ see if the original user has enough privileges to pull this stunt      unless (&Apache::lonnet::homeserver($form{'suname'},$form{'udom'})
  if (&Apache::lonnet::privileged($form{'uname'},$form{'udom'})) {   eq 'no_host') {
 # ---------------------------------------------------- see if the su-user exists   &Apache::lonnet::logthis(&Apache::lonnet::homeserver($form{'suname'},$form{'udom'}));
     unless (&Apache::lonnet::homeserver($form{'suname'},$form{'udom'})  # ------------------------------ see if the su-user is not too highly privileged
  eq 'no_host') {   unless (&Apache::lonnet::privileged($form{'suname'},$form{'udom'})) {
  &Apache::lonnet::logthis(&Apache::lonnet::homeserver($form{'suname'},$form{'udom'}));  # -------------------------------------------------------- actually switch users
 # ------------------------------ see if the su-user is not too highly privileged      &Apache::lonnet::logperm('User '.$form{'uname'}.' at '.$form{'udom'}.
  unless (&Apache::lonnet::privileged($form{'suname'},$form{'udom'})) {   ' logging in as '.$form{'suname'});
 # -------------------------------------------------------- actually switch users      $form{'uname'}=$form{'suname'};
     &Apache::lonnet::logperm('User '.$form{'uname'}.' at '.$form{'udom'}.   } else {
  ' logging in as '.$form{'suname'});      &Apache::lonnet::logthis('Attempted switch user to privileged user');
     $form{'uname'}=$form{'suname'};   }
  } else {      }
     &Apache::lonnet::logthis('Attempted switch user to privileged user');   } else {
  }      &Apache::lonnet::logthis('Non-privileged user attempting switch user');
     }   }
  } else {      }
     &Apache::lonnet::logthis('Non-privileged user attempting switch user');  
  }      my ($is_balancer,$otherserver);
     }  
       unless ($hosthere) {
     my ($is_balancer,$otherserver);          ($is_balancer,$otherserver) =
               &Apache::lonnet::check_loadbalancing($form{'uname'},$form{'udom'});
     unless ($hosthere) {      }
         ($is_balancer,$otherserver) =  
             &Apache::lonnet::check_loadbalancing($form{'uname'},$form{'udom'});      if ($is_balancer) {
     }          if (!$otherserver) {
               ($otherserver) = &Apache::lonnet::choose_server($form{'udom'});
     if ($is_balancer) {          }
         if (!$otherserver) {           if ($otherserver) {
             ($otherserver) = &Apache::lonnet::choose_server($form{'udom'});              &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef,
         }                       \%form);
         if ($otherserver) {              my $switchto = '/adm/switchserver?otherserver='.$otherserver;
             &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef,              if (($firsturl) && ($firsturl ne '/adm/switchserver') && ($firsturl ne '/adm/roles')) {
                      \%form);                  $switchto .= '&origurl='.$firsturl;
     $r->internal_redirect('/adm/switchserver?otherserver='.$otherserver.'&origurl='.$firsturl);              }
         } else {              if ($form{'role'}) {
             $r->print(&noswitch());                  $switchto .= '&role='.$form{'role'};
         }              }
         return OK;              if ($form{'symb'}) {
     } else {                  $switchto .= '&symb='.$form{'symb'};
         if (!&check_can_host($r,\%form,$authhost)) {              }
             my ($otherserver) = &Apache::lonnet::choose_server($form{'udom'});              $r->internal_redirect($switchto);
             if ($otherserver) {          } else {
                 &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef,              $r->print(&noswitch());
                          \%form);          }
                 $r->internal_redirect('/adm/switchserver?otherserver='.$otherserver.'&origurl='.$firsturl);          return OK;
             } else {      } else {
                 $r->print(&noswitch());          if (!&check_can_host($r,\%form,$authhost)) {
             }              my ($otherserver) = &Apache::lonnet::choose_server($form{'udom'});
             return OK;              if ($otherserver) {
         }                  &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef,
                            \%form);
 # ------------------------------------------------------- Do the load balancing                  my $switchto = '/adm/switchserver?otherserver='.$otherserver;
                   if (($firsturl) && ($firsturl ne '/adm/switchserver') && ($firsturl ne '/adm/roles')) {
 # ---------------------------------------------------------- Determine own load                      $switchto .= '&origurl='.$firsturl;
         my $loadlim = $r->dir_config('lonLoadLim');                  }
         my $loadavg;                  if ($form{'role'}) {
         {                      $switchto .= '&role='.$form{'role'};
             my $loadfile=Apache::File->new('/proc/loadavg');                  }
             $loadavg=<$loadfile>;                  if ($form{'symb'}) {
         }                      $switchto .= '&symb='.$form{'symb'};
         $loadavg =~ s/\s.*//g;                  }
         my $loadpercent=sprintf("%.1f",100*$loadavg/$loadlim);                  $r->internal_redirect($switchto);
         my $userloadpercent=&Apache::lonnet::userload();              } else {
                   $r->print(&noswitch());
 # ---------------------------------------------------------- Are we overloaded?              }
         if ((($userloadpercent>100.0)||($loadpercent>100.0))) {              return OK;
             my $unloaded=Apache::lonnet::spareserver($loadpercent,$userloadpercent,1,$form{'udom'});          }
             if (!$unloaded) {  
                 ($unloaded) = &Apache::lonnet::choose_server($form{'udom'});  # ------------------------------------------------------- Do the load balancing
             }  
             if ($unloaded) {  # ---------------------------------------------------------- Determine own load
                 &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',          my $loadlim = $r->dir_config('lonLoadLim');
                          undef,\%form);          my $loadavg;
                 $r->internal_redirect('/adm/switchserver?otherserver='.$unloaded.'&origurl='.$firsturl);          {
                 return OK;              my $loadfile=Apache::File->new('/proc/loadavg');
             }              $loadavg=<$loadfile>;
         }          }
         &success($r,$form{'uname'},$form{'udom'},$authhost,$firsturl,undef,          $loadavg =~ s/\s.*//g;
                  \%form);          my $loadpercent=sprintf("%.1f",100*$loadavg/$loadlim);
         return OK;          my $userloadpercent=&Apache::lonnet::userload();
     }  
 }  # ---------------------------------------------------------- Are we overloaded?
           if ((($userloadpercent>100.0)||($loadpercent>100.0))) {
 sub check_can_host {              my $unloaded=Apache::lonnet::spareserver($loadpercent,$userloadpercent,1,$form{'udom'});
     my ($r,$form,$authhost,$domdesc) = @_;              if (!$unloaded) {
     return unless (ref($form) eq 'HASH');                  ($unloaded) = &Apache::lonnet::choose_server($form{'udom'});
     my $canhost = 1;              }
     my $lonhost = $r->dir_config('lonHostID');              if ($unloaded) {
     my $udom = $form->{'udom'};                  &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',
     my @intdoms;                           undef,\%form);
     my $internet_names = &Apache::lonnet::get_internet_names($lonhost);                  $r->internal_redirect('/adm/switchserver?otherserver='.$unloaded.'&origurl='.$firsturl);
     if (ref($internet_names) eq 'ARRAY') {                  return OK;
         @intdoms = @{$internet_names};              }
     }          }
     my $uprimary_id = &Apache::lonnet::domain($udom,'primary');          &success($r,$form{'uname'},$form{'udom'},$authhost,$firsturl,undef,
     my $uint_dom = &Apache::lonnet::internet_dom($uprimary_id);                   \%form);
     unless ($uint_dom ne '' && grep(/^\Q$uint_dom\E$/,@intdoms)) {          return OK;
         my $machine_dom = &Apache::lonnet::host_domain($lonhost);      }
         my $hostname = &Apache::lonnet::hostname($lonhost);  }
         my $serverhomeID = &Apache::lonnet::get_server_homeID($hostname);  
         my $serverhomedom = &Apache::lonnet::host_domain($serverhomeID);  sub decrypt {
         my %defdomdefaults = &Apache::lonnet::get_domain_defaults($serverhomedom);      my ($key, @chunks) = @_;
         my %udomdefaults = &Apache::lonnet::get_domain_defaults($udom);  
         my $loncaparev;      my $keybin = pack("H16",$key);
         if ($authhost eq 'no_account_on_host') {  
             $loncaparev = &Apache::lonnet::get_server_loncaparev($machine_dom);      my $cipher;
         } else {      if ($Crypt::DES::VERSION >= 2.03) {
             $loncaparev = &Apache::lonnet::get_server_loncaparev($machine_dom,$lonhost);          $cipher = new Crypt::DES $keybin;
         }      } else {
         $canhost = &Apache::lonnet::can_host_session($udom,$lonhost,$loncaparev,          $cipher = new DES $keybin;
                                                      $udomdefaults{'remotesessions'},      }
                                                      $defdomdefaults{'hostedsessions'});  
     }      my $upass='';
     unless ($canhost) {      for (my $i=0;$i<=2;$i++) {
         if ($authhost eq 'no_account_on_host') {          my $chunk =
             my $checkloginvia = 1;              $cipher->decrypt(
             my ($login_host,$hostname) =                   unpack("a8",pack("H16",substr($chunks[$i],0,16))));
                 &Apache::lonnet::choose_server($udom,$checkloginvia);  
             &Apache::loncommon::content_type($r,'text/html');          $chunk .=
             $r->send_http_header;              $cipher->decrypt(
             if ($login_host ne '') {                  unpack("a8",pack("H16",substr($chunks[$i],16,16))));
                 my $protocol = $Apache::lonnet::protocol{$login_host};  
                 $protocol = 'http' if ($protocol ne 'https');          $chunk = substr($chunk,1,ord(substr($chunk,0,1)));
                 my $newurl = $protocol.'://'.$hostname.'/adm/createaccount';          $upass .= $chunk;
                 $r->print(&Apache::loncommon::start_page('Create a user account in LON-CAPA').      }
                           '<h3>'.&mt('Account creation').'</h3>'.      return $upass;
                           &mt('You do not currently have a LON-CAPA account at this institution.').'<br />'.  }
                           '<p>'.&mt('You will be able to create one by logging into a LON-CAPA server within the [_1] domain.',$domdesc).'</p>'.  
                           '<p>'.&mt('[_1]Log in[_2]','<a href="'.$newurl.'">','</a>').  sub check_can_host {
                           &Apache::loncommon::end_page());      my ($r,$form,$authhost,$domdesc) = @_;
             } else {      return unless (ref($form) eq 'HASH');
                 $r->print(&Apache::loncommon::start_page('Access to LON-CAPA unavailable').      my $canhost = 1;
                           '<h3>'.&mt('Account creation unavailable').'</h3>'.      my $lonhost = $r->dir_config('lonHostID');
                           &mt('You do not currently have a LON-CAPA account at this institution.').'<br />'.      my $udom = $form->{'udom'};
                           '<p>'.&mt('Currently a LON-CAPA server is not available within the [_1] domain for you to log-in to, to create an account.',$domdesc).'</p>'.      my @intdoms;
                           &Apache::loncommon::end_page());      my $internet_names = &Apache::lonnet::get_internet_names($lonhost);
             }      if (ref($internet_names) eq 'ARRAY') {
         } else {          @intdoms = @{$internet_names};
             &success($r,$form->{'uname'},$udom,$authhost,'noredirect',undef,      }
                      $form);      my $uprimary_id = &Apache::lonnet::domain($udom,'primary');
             my ($otherserver) = &Apache::lonnet::choose_server($udom);      my $uint_dom = &Apache::lonnet::internet_dom($uprimary_id);
             $r->internal_redirect('/adm/switchserver?otherserver='.$otherserver);      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 $canhost;          my $serverhomeID = &Apache::lonnet::get_server_homeID($hostname);
 }          my $serverhomedom = &Apache::lonnet::host_domain($serverhomeID);
           my %defdomdefaults = &Apache::lonnet::get_domain_defaults($serverhomedom);
 sub noswitch {          my %udomdefaults = &Apache::lonnet::get_domain_defaults($udom);
     my $result = &Apache::loncommon::start_page('Access to LON-CAPA unavailable').          my $loncaparev;
                  '<h3>'.&mt('Session unavailable').'</h3>'.          if ($authhost eq 'no_account_on_host') {
                  &mt('This LON-CAPA server is unable to host your session.').'<br />'.              $loncaparev = &Apache::lonnet::get_server_loncaparev($machine_dom);
                  '<p>'.&mt('Currently no other LON-CAPA server is available to host your session either.').'</p>'.          } else {
                  &Apache::loncommon::end_page();              $loncaparev = &Apache::lonnet::get_server_loncaparev($machine_dom,$lonhost);
     return $result;          }
 }          $canhost = &Apache::lonnet::can_host_session($udom,$lonhost,$loncaparev,
                                                        $udomdefaults{'remotesessions'},
 sub loginhelpdisplay {                                                       $defdomdefaults{'hostedsessions'});
     my ($authdomain) = @_;      }
     my $login_help = 1;      unless ($canhost) {
     my $lang = &Apache::lonlocal::current_language();          if ($authhost eq 'no_account_on_host') {
     if ($login_help) {              my $checkloginvia = 1;
         my $dom = $authdomain;              my ($login_host,$hostname) =
         if ($dom eq '') {                  &Apache::lonnet::choose_server($udom,$checkloginvia);
             $dom = &Apache::lonnet::default_login_domain();              &Apache::loncommon::content_type($r,'text/html');
         }              $r->send_http_header;
         my %domconfhash = &Apache::loncommon::get_domainconf($dom);              if ($login_host ne '') {
         my $loginhelp_url;                  my $protocol = $Apache::lonnet::protocol{$login_host};
         if ($lang) {                  $protocol = 'http' if ($protocol ne 'https');
             $loginhelp_url = $domconfhash{$dom.'.login.helpurl_'.$lang};                  my $newurl = $protocol.'://'.$hostname.'/adm/createaccount';
             if ($loginhelp_url ne '') {                  $r->print(&Apache::loncommon::start_page('Create a user account in LON-CAPA').
                 return $loginhelp_url;                            '<h3>'.&mt('Account creation').'</h3>'.
             }                            &mt('You do not currently have a LON-CAPA account at this institution.').'<br />'.
         }                            '<p>'.&mt('You will be able to create one by logging into a LON-CAPA server within the [_1] domain.',$domdesc).'</p>'.
         $loginhelp_url = $domconfhash{$dom.'.login.helpurl_nolang'};                            '<p>'.&mt('[_1]Log in[_2]','<a href="'.$newurl.'">','</a>').
         if ($loginhelp_url ne '') {                            &Apache::loncommon::end_page());
             return $loginhelp_url;              } else {
         } else {                  $r->print(&Apache::loncommon::start_page('Access to LON-CAPA unavailable').
             return '/adm/loginproblems.html';                            '<h3>'.&mt('Account creation unavailable').'</h3>'.
         }                            &mt('You do not currently have a LON-CAPA account at this institution.').'<br />'.
     }                            '<p>'.&mt('Currently a LON-CAPA server is not available within the [_1] domain for you to log-in to, to create an account.',$domdesc).'</p>'.
     return;                            &Apache::loncommon::end_page());
 }              }
           } else {
 1;              &success($r,$form->{'uname'},$udom,$authhost,'noredirect',undef,
 __END__                       $form);
               my ($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.1.121.2.6  
changed lines
  Added in v.1.136

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