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Diff for /loncom/auth/lonauth.pm between versions 1.73 and 1.148

version 1.73, 2006/01/19 22:14:38 version 1.148, 2017/08/08 18:26:34
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 Apache::Constants qw(:common);  use LONCAPA qw(:DEFAULT :match);
 use Apache::File;  use Apache::Constants qw(:common);
 use CGI qw(:standard);  use CGI qw(:standard);
 use CGI::Cookie();  use Apache::loncommon();
 use DynaLoader; # for Crypt::DES version  use Apache::lonnet;
 use Crypt::DES;  use Apache::lonmenu();
 use Apache::loncommon();  use Apache::createaccount;
 use Apache::lonnet;  use Fcntl qw(:flock);
 use Apache::lonmenu();  use Apache::lonlocal;
 use Fcntl qw(:flock);  use Apache::File();
 use Apache::lonlocal;  use HTML::Entities;
 use POSIX qw(strftime);  use Digest::MD5;
    
 my %FORM;  # ------------------------------------------------------------ Successful login
   sub success {
 # ------------------------------------------------------------ Successful login      my ($r, $username, $domain, $authhost, $lowerurl, $extra_env,
    $form) = @_;
 sub success {  
     my ($r, $username, $domain, $authhost,$lowerurl) = @_;  # ------------------------------------------------------------ Get cookie ready
     my $lonids=$r->dir_config('lonIDsDir');      my $cookie =
    &Apache::loncommon::init_user_environment($r, $username, $domain,
     my $public=($username eq 'public' && $domain eq 'public');    $authhost, $form,
     {'extra_env' => $extra_env,});
 # See if old ID present, if so, remove  
       my $public=($username eq 'public' && $domain eq 'public');
     my ($filename,$cookie,$userroles);  
     my $now=time;      if ($public or $lowerurl eq 'noredirect') { return $cookie; }
   
     if ($public) {  # -------------------------------------------------------------------- Log this
  my $max_public=100;  
  my $oldest;      &Apache::lonnet::log($domain,$username,$authhost,
  my $oldest_time=0;                           "Login $ENV{'REMOTE_ADDR'}");
  for(my $next=1;$next<=$max_public;$next++) {  
     if (-e $lonids."/publicuser_$next.id") {  # ------------------------------------------------- Check for critical messages
  my $mtime=(stat($lonids."/publicuser_$next.id"))[9];  
  if ($mtime<$oldest_time || !$oldest_time) {      my @what=&Apache::lonnet::dump('critical',$domain,$username);
     $oldest_time=$mtime;      if ($what[0]) {
     $oldest=$next;   if (($what[0] ne 'con_lost') && ($what[0]!~/^error\:/)) {
  }      $lowerurl='/adm/email?critical=display';
     } else {          }
  $cookie="publicuser_$next";      }
  last;  
     }  # ----------------------------------------------------------- Get cookies ready
  }      my ($securecookie,$defaultcookie);
  if (!$cookie) { $cookie="publicuser_$oldest"; }      if ($ENV{'SERVER_PORT'} == 443) {
     } else {          $securecookie="lonID=$cookie; path=/; HttpOnly; secure";
  opendir(DIR,$lonids);          my $lonidsdir=$r->dir_config('lonIDsDir');
  while ($filename=readdir(DIR)) {          if (($lonidsdir) && (-e "$lonidsdir/$cookie.id")) {
     if ($filename=~/^$username\_\d+\_$domain\_$authhost\.id$/) {              my $linkname=substr(Digest::MD5::md5_hex(Digest::MD5::md5_hex(time(). {}. rand(). $$)), 0, 32).'_linked';
  unlink($lonids.'/'.$filename);              if (-e "$lonidsdir/$linkname.id") {
     }                  unlink("$lonidsdir/$linkname.id");
  }              }
  closedir(DIR);              my $made_symlink = eval { symlink("$lonidsdir/$cookie.id",
                                                 "$lonidsdir/$linkname.id"); 1 };
 # Give them a new cookie              if ($made_symlink) {
                   $defaultcookie = "lonLinkID=$linkname; path=/; HttpOnly;";
  $cookie="$username\_$now\_$domain\_$authhost";                  &Apache::lonnet::appenv({'user.linkedenv' => "$lonidsdir/$linkname.id"});
                   }
 # Initialize roles          }
       } else {
  $userroles=Apache::lonnet::rolesinit($domain,$username,$authhost);          $defaultcookie = "lonID=$cookie; path=/; HttpOnly;";
     }      }
 # ------------------------------------ Check browser type and MathML capability  # -------------------------------------------------------- Menu script and info
       my $destination = $lowerurl;
     my ($httpbrowser,$clientbrowser,$clientversion,$clientmathml,  
         $clientunicode,$clientos) = &Apache::loncommon::decode_user_agent($r);      if (defined($form->{role})) {
           my $envkey = 'user.role.'.$form->{role};
 # -------------------------------------- Any accessibility options to remember?          my $now=time;
     if (($FORM{'interface'}) && ($FORM{'remember'} eq 'true')) {          my $then=$env{'user.login.time'};
  foreach ('imagesuppress','appletsuppress',          my $refresh=$env{'user.refresh.time'};
  'embedsuppress','fontenhance','blackwhite') {          my $update=$env{'user.update.time'};
     if ($FORM{$_} eq 'true') {          if (!$update) {
  &Apache::lonnet::put('environment',{$_ => 'on'},              $update = $then;
      $domain,$username);          }
     } else {          if (exists($env{$envkey})) {
  &Apache::lonnet::del('environment',[$_],$domain,$username);              my ($role,$where,$trolecode,$tstart,$tend,$tremark,$tstatus);
     }              &Apache::lonnet::role_status($envkey,$update,$refresh,$now,\$role,\$where,
  }                                           \$trolecode,\$tstatus,\$tstart,\$tend);
     }              if ($tstatus eq 'is') {
 # ------------------------------------------------------------- Get environment                  $destination  .= ($destination =~ /\?/) ? '&' : '?';
                   my $newrole = &HTML::Entities::encode($form->{role},'"<>&');
     my $userenv;                  $destination .= 'selectrole=1&'.$newrole.'=1';
     my %userenv=Apache::lonnet::dump('environment',$domain,$username);              }
     my ($tmp) = keys(%userenv);          }
     if ($tmp !~ /^(con_lost|error|no_such_host)/i) {      }
  # default remote control to off      if (defined($form->{symb})) {
  if ($userenv{'remote'} ne 'on') { $userenv{'remote'} = 'off'; }          my $destsymb = $form->{symb};
  foreach my $key (keys(%userenv)) {          $destination  .= ($destination =~ /\?/) ? '&' : '?';
     $userenv.="environment.$key=$userenv{$key}\n";          if ($destsymb =~ /___/) {
  }              # FIXME Need to deal with encrypted symbs and urls as needed.
     }              my ($map,$resid,$desturl)=split(/___/,$destsymb);
     if (($userenv{'interface'}) && (!$FORM{'interface'})) {              $desturl = &Apache::lonnet::clutter($desturl);
  $FORM{'interface'}=$userenv{'interface'};              $desturl = &HTML::Entities::encode($desturl,'"<>&');
     }              $destsymb = &HTML::Entities::encode($destsymb,'"<>&');
     $env{'environment.remote'}=$userenv{'remote'};              $destination .= 'destinationurl='.$desturl.
     if ($userenv{'texengine'} eq 'ttm') { $clientmathml=1; }                              '&destsymb='.$destsymb;
           } else {
 # --------------- Do not trust query string to be put directly into environment              $destsymb = &HTML::Entities::encode($destsymb,'"<>&');
     foreach ('imagesuppress','appletsuppress',              $destination .= 'destinationurl='.$destsymb;
      'embedsuppress','fontenhance','blackwhite',          }
      'interface','localpath','localres') {      }
  $FORM{$_}=~s/[\n\r\=]//gs;      if ($destination =~ m{^/adm/roles}) {
     }          $destination  .= ($destination =~ /\?/) ? '&' : '?';
 # --------------------------------------------------------- Write first profile          $destination .= 'source=login';
       }
     {  
  my $idf=Apache::File->new(">$lonids/$cookie.id");      my $windowinfo = Apache::lonhtmlcommon::scripttag('self.name="loncapaclient";');
  unless (flock($idf,LOCK_EX)) {      my $header = '<meta HTTP-EQUIV="Refresh" CONTENT="0; url='.$destination.'" />';
     &Apache::lonnet::logthis("<font color=blue>WARNING: ".      my $brcrum = [{'href' => '',
    'Could not obtain exclusive lock in lonauth: '.$!);                     'text' => 'Successful Login'},];
     $idf->close();      my $args = {'bread_crumbs' => $brcrum,};
     return 'error: '.$!;      unless ((defined($form->{role})) || (defined($form->{symb}))) {
  }          my $update=$env{'user.update.time'};
  if ($userenv ne '') { print $idf "$userenv\n"; }          if (!$update) {
  print $idf "user.name=$username\n";              $update = $env{'user.login.time'};
  print $idf "user.domain=$domain\n";          }
  print $idf "user.home=$authhost\n";          my %roles_in_env;
  print $idf "browser.type=$clientbrowser\n";          my $showcount = &Apache::lonroles::roles_from_env(\%roles_in_env,$update);
  print $idf "browser.version=$clientversion\n";          if ($showcount == 1) {
  print $idf "browser.mathml=$clientmathml\n";              foreach my $rolecode (keys(%roles_in_env)) {
  print $idf "browser.unicode=$clientunicode\n";                  my ($cid) = ($rolecode =~ m{^\Quser.role.st./\E($match_domain/$match_courseid)(?:/|$)});
  print $idf "browser.os=$clientos\n";                  if ($cid) {
         if ($FORM{'localpath'}) {                      my %coursedescription =
            print $idf "browser.localpath=$FORM{'localpath'}\n";                          &Apache::lonnet::coursedescription($cid,{'one_time' => '1'});
            print $idf "browser.localres=$FORM{'localres'}\n";                      if ($coursedescription{'type'} eq 'Placement') {
         }                          $args->{'crstype'} = 'Placement';
         print $idf "server.domain=".$r->dir_config('lonDefDomain')."\n";                      }
         my $timezone=POSIX::strftime("%Z",localtime(time));                      last;
         print $idf "server.timezone=$timezone\n";                  }
  print $idf "request.course.fn=\n";              }
  print $idf "request.course.uri=\n";          }
  print $idf "request.course.sec=\n";      }
  print $idf "request.role=cm\n";      my $start_page=&Apache::loncommon::start_page('Successful Login',
         print $idf "request.role.adv=$env{'user.adv'}\n";                                                    $header,$args);
  print $idf "request.host=$ENV{'REMOTE_ADDR'}\n";      my $end_page  =&Apache::loncommon::end_page();
  if ($public) {  
     print $idf "environment.remote=off\n";   my $continuelink='<a href="'.$destination.'">'.&mt('Continue').'</a>';
  }  # ------------------------------------------------- Output for successful login
  if ($FORM{'interface'}) {  
     $FORM{'interface'}=~s/\W//gs;      &Apache::loncommon::content_type($r,'text/html');
     print $idf "browser.interface=$FORM{'interface'}\n";      if ($securecookie) {
     $env{'browser.interface'}=$FORM{'interface'};          $r->headers_out->add('Set-cookie' => $securecookie);
     foreach ('imagesuppress','appletsuppress',      }
      'embedsuppress','fontenhance','blackwhite') {      if ($defaultcookie) {
  if (($FORM{$_} eq 'true') ||          $r->headers_out->add('Set-cookie' => $defaultcookie);
     ($userenv{$_} eq 'on')) {      }
     print $idf "browser.$_=on\n";      $r->send_http_header;
  }  
     }      my %lt=&Apache::lonlocal::texthash(
  }         'wel' => 'Welcome',
  if ($userroles ne '') { print $idf "$userroles"; }         'pro' => 'Login problems?',
  $idf->close();         );
     }      my $loginhelp = &loginhelpdisplay($domain);
     $env{'request.role'}='cm';      if ($loginhelp) {
     $env{'request.role.adv'}=$env{'user.adv'};          $loginhelp = '<p><a href="'.$loginhelp.'">'.$lt{'pro'}.'</a></p>';
     $env{'browser.type'}=$clientbrowser;      }
 # -------------------------------------------------------------------- Log this  
       my $welcome = &mt('Welcome to the Learning[_1]Online[_2] Network with CAPA. Please wait while your session is being set up.','<i>','</i>');
     &Apache::lonnet::log($domain,$username,$authhost,      $r->print(<<ENDSUCCESS);
                          "Login $ENV{'REMOTE_ADDR'}");  $start_page
   $windowinfo
 # ------------------------------------------------- Check for critical messages  <h1>$lt{'wel'}</h1>
   $welcome
     my @what=&Apache::lonnet::dump('critical',$domain,$username);  $loginhelp
     if ($what[0]) {  $continuelink
  if (($what[0] ne 'con_lost') && ($what[0]!~/^error\:/)) {  $end_page
     $lowerurl='/adm/email?critical=display';  ENDSUCCESS
         }      return;
     }  }
   
 # ------------------------------------------------------------ Get cookie ready  # --------------------------------------------------------------- Failed login!
   
     if ($public or $lowerurl eq 'noredirect') { return $cookie; }  sub failed {
       my ($r,$message,$form) = @_;
     $cookie="lonID=$cookie; path=/";      (undef,undef,undef,my $clientmathml,my $clientunicode) =
 # -------------------------------------------------------- Menu script and info          &Apache::loncommon::decode_user_agent();
     my $windowinfo=&Apache::lonmenu::open($clientos);      my $args = {};
     my $startupremote=&Apache::lonmenu::startupremote($lowerurl);      if ($clientunicode && !$clientmathml) {
     my $remoteinfo=&Apache::lonmenu::load_remote_msg($lowerurl);          $args = {'browser.unicode' => 1};
     my $setflags=&Apache::lonmenu::setflags();      }
     my $maincall=&Apache::lonmenu::maincall();  
     my $bodytag=&Apache::loncommon::bodytag('Successful Login');      my $start_page = &Apache::loncommon::start_page('Unsuccessful Login',undef,$args);
     my $add=&addcontent();      my $uname = &Apache::loncommon::cleanup_html($form->{'uname'});
     my $continuelink;      my $udom = &Apache::loncommon::cleanup_html($form->{'udom'});
     if (($env{'browser.interface'} eq 'textual') ||      if (&Apache::lonnet::domain($udom,'description') eq '') {
         ($env{'environment.remote'} eq 'off')) {          undef($udom);
  $continuelink="<a href=\"$lowerurl\">".&mt('Continue')."</a>";      }
     }      my $retry = '/adm/login';
 # ------------------------------------------------- Output for successful login      if ($uname eq $form->{'uname'}) {
           $retry .= '?username='.$uname;
     $r->send_cgi_header(<<ENDHEADER);      }
 Content-type: text/html$add      if ($udom) {
 Set-cookie: $cookie          $retry .= (($retry=~/\?/)?'&amp;':'?').'domain='.$udom;
       }
 ENDHEADER      if (exists($form->{role})) {
     my %lt=&Apache::lonlocal::texthash(          my $role = &Apache::loncommon::cleanup_html($form->{role});
        'wel' => 'Welcome',          if ($role ne '') {
        'mes' => 'Welcome to the Learning<i>Online</i> Network with CAPA. Please wait while your session is being set up',              $retry .= (($retry=~/\?/)?'&amp;':'?').'role='.$role;
        'pro' => 'Problems',          }
        'log' => 'loginproblems.html',      }
        );      if (exists($form->{symb})) {
     $r->print(<<ENDSUCCESS);          my $symb = &Apache::loncommon::cleanup_html($form->{symb});
 <html>          if ($symb ne '') {
 <head>              $retry .= (($retry=~/\?/)?'&amp;':'?').'symb='.$symb;
 <title>Successful Login to the LearningOnline Network with CAPA</title>          }
 $startupremote      }
 </head>      my $end_page = &Apache::loncommon::end_page();
 $bodytag      &Apache::loncommon::content_type($r,'text/html');
 $setflags      $r->send_http_header;
 $windowinfo      my @actions =
 <h1>$lt{'wel'}</h1>           (&mt('Please [_1]log in again[_2].','<a href="'.$retry.'">','</a>'));
 $lt{'mes'}.<p>      my $loginhelp = &loginhelpdisplay($udom);
 <a href="/adm/$lt{'log'}">$lt{'pro'}?</a></p>      if ($loginhelp) {
 $remoteinfo          push(@actions, '<a href="'.$loginhelp.'">'.&mt('Login problems?').'</a>');
 $maincall      }
 $continuelink      #FIXME: link to helpdesk might be added here
 </body>  
 </html>      $r->print(
 ENDSUCCESS         $start_page
 }        .'<h2>'.&mt('Sorry ...').'</h2>'
         .&Apache::lonhtmlcommon::confirm_success(&mt($message),1).'<br /><br />'
 # --------------------------------------------------------------- Failed login!        .&Apache::lonhtmlcommon::actionbox(\@actions)
         .$end_page
 sub failed {      );
     my ($r,$message) = @_;   }
     my $bodytag=&Apache::loncommon::bodytag('Unsuccessful Login');  
     my $add=&addcontent();  # ------------------------------------------------------------------ Rerouting!
     $r->send_cgi_header(<<ENDFHEADER);  
 Content-type: text/html$add  sub reroute {
       my ($r) = @_;
 ENDFHEADER      &Apache::loncommon::content_type($r,'text/html');
     $r->print(<<ENDFAILED);      $r->send_http_header;
 <html>      my $msg='<b>'.&mt('Sorry ...').'</b><br />'
 <head>             .&mt('Please [_1]log in again[_2].');
 <title>Unsuccessful Login to the LearningOnline Network with CAPA</title>      &Apache::loncommon::simple_error_page($r,'Rerouting',$msg,{'no_auto_mt_msg' => 1});
 </head>  }
 $bodytag  
 <h1>Sorry ...</h1>  # ---------------------------------------------------------------- Main handler
 <p><b>$message</b></p>  
 <p>Please <a href="/adm/login?username=$FORM{'uname'}&domain=$FORM{'udom'}">log in again</a>.</p>  sub handler {
 <p>      my $r = shift;
 <a href="/adm/loginproblems.html">Problems?</a></p>      my $londocroot = $r->dir_config('lonDocRoot');
 </body>  # Are we re-routing?
 </html>      if (-e "$londocroot/lon-status/reroute.txt") {
 ENDFAILED   &reroute($r);
 }   return OK;
       }
 # --------------------------------------------------------------------- Charset  
       &Apache::lonlocal::get_language_handle($r);
 sub addcontent {  
     my $encoding=&Apache::lonlocal::current_encoding;  # -------------------------------- Prevent users from attempting to login twice
     if ($encoding) {      my $handle = &Apache::lonnet::check_for_valid_session($r);
  return '; charset='.$encoding;      if ($handle ne '') {
     } else {          my $lonidsdir=$r->dir_config('lonIDsDir');
  return '';          if ($handle=~/^publicuser\_/) {
     }  # For "public user" - remove it, we apparently really want to login
 }              unlink($r->dir_config('lonIDsDir')."/$handle.id");
           } else {
 # ------------------------------------------------------------------ Rerouting!  # Indeed, a valid token is found
               &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);
 sub reroute {      &Apache::loncommon::content_type($r,'text/html');
     my $r=shift;      $r->send_http_header;
     my $bodytag=&Apache::loncommon::bodytag('Rerouting');      my $start_page =
     $r->send_cgi_header(<<ENDRFHEADER);          &Apache::loncommon::start_page('Already logged in');
 Content-type: text/html      my $end_page =
           &Apache::loncommon::end_page();
 ENDRFHEADER              my $dest = '/adm/roles';
     $r->print(<<ENDRFAILED);              if ($env{'form.firsturl'} ne '') {
 <html>                  $dest = $env{'form.firsturl'};
 <head>              }
 <title>Rerouting Login to the LearningOnline Network with CAPA</title>              $r->print(
 </head>                 $start_page
 $bodytag                .'<p class="LC_warning">'.&mt('You are already logged in!').'</p>'
 <h1>Sorry ...</h1>                .'<p>'.&mt('Please either [_1]continue the current session[_2] or [_3]log out[_4].'
 Please <a href="/">log in again</a>.                      ,'<a href="'.$dest.'">','</a>','<a href="/adm/logout">','</a>')
 </body>                .'</p>'
 </html>                .$end_page
 ENDRFAILED              );
 }              return OK;
           }
 # ---------------------------------------------------------------- Main handler      }
   
 sub handler {  # ---------------------------------------------------- No valid token, continue
     my $r = shift;  
   
 # Are we re-routing?      my $buffer;
     if (-e '/home/httpd/html/lon-status/reroute.txt') {      if ($r->header_in('Content-length') > 0) {
  &reroute($r);   $r->read($buffer,$r->header_in('Content-length'),0);
  return OK;      }
     }      my %form;
       foreach my $pair (split(/&/,$buffer)) {
     &Apache::lonlocal::get_language_handle($r);         my ($name,$value) = split(/=/,$pair);
          $value =~ tr/+/ /;
 # -------------------------------- Prevent users from attempting to login twice         $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
     my %cookies=CGI::Cookie->parse($r->header_in('Cookie'));         $form{$name}=$value;
     my $lonid=$cookies{'lonID'};      }
     my $cookie;  
     if ($lonid) {      if ((!$form{'uname'}) || (!$form{'upass0'}) || (!$form{'udom'})) {
  my $handle=$lonid->value;   &failed($r,'Username, password and domain need to be specified.',
         $handle=~s/\W//g;   \%form);
         my $lonidsdir=$r->dir_config('lonIDsDir');          return OK;
         if ((-e "$lonidsdir/$handle.id") && ($handle ne '')) {      }
 # Indeed, a valid token is found  
     $r->send_cgi_header(<<ENDFHEADER);  # split user logging in and "su"-user
 Content-type: text/html  
       ($form{'uname'},$form{'suname'},$form{'sudom'})=split(/\:/,$form{'uname'});
 ENDFHEADER      $form{'uname'} = &LONCAPA::clean_username($form{'uname'});
     my $bodytag=&Apache::loncommon::bodytag('Already logged in');      $form{'suname'}= &LONCAPA::clean_username($form{'suname'});
     $r->print(<<ENDFAILED);      $form{'udom'}  = &LONCAPA::clean_domain($form{'udom'});
 <html>      $form{'sudom'} = &LONCAPA::clean_domain($form{'sudom'});
 <head>  
 <title>Already logged in</title>      my $role   = $r->dir_config('lonRole');
 </head>      my $domain = $r->dir_config('lonDefDomain');
 $bodytag      my $prodir = $r->dir_config('lonUsersDir');
 <h1>You are already logged in</h1>      my $contact_name = &mt('LON-CAPA helpdesk');
 <p>Please either <a href="/adm/roles">continue the current session</a> or  
 <a href="/adm/logout">logout</a>.</p>  # ---------------------------------------- Get the information from login token
 <p>  
 <a href="/adm/loginproblems.html">Problems?</a></p>      my $tmpinfo=Apache::lonnet::reply('tmpget:'.$form{'logtoken'},
 </body>                                        $form{'serverid'});
 </html>  
 ENDFAILED      if (($tmpinfo=~/^error/) || ($tmpinfo eq 'con_lost') ||
            return OK;          ($tmpinfo eq 'no_such_host')) {
  }   &failed($r,'Information needed to verify your login information is missing, inaccessible or expired.',\%form);
     }          return OK;
       } else {
 # ---------------------------------------------------- No valid token, continue   my $reply = &Apache::lonnet::reply('tmpdel:'.$form{'logtoken'},
      $form{'serverid'});
           if ( $reply ne 'ok' ) {
     my $buffer;              &failed($r,'Session could not be opened.',\%form);
     $r->read($buffer,$r->header_in('Content-length'),0);      &Apache::lonnet::logthis("ERROR got a reply of $reply when trying to contact ". $form{'serverid'}." to get login token");
     my @pairs=split(/&/,$buffer);      return OK;
     my $pair; my $name; my $value;   }
     undef %FORM;      }
     %FORM=();  
     foreach $pair (@pairs) {      if (!&Apache::lonnet::domain($form{'udom'})) {
        ($name,$value) = split(/=/,$pair);          &failed($r,'The domain you provided is not a valid LON-CAPA domain.',\%form);
        $value =~ tr/+/ /;          return OK;
        $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;      }
        $FORM{$name}=$value;  
     }       my ($key,$firsturl,$rolestr,$symbstr,$iptokenstr)=split(/&/,$tmpinfo);
       if ($rolestr) {
     if ((!$FORM{'uname'}) || (!$FORM{'upass0'}) || (!$FORM{'udom'})) {          $rolestr = &unescape($rolestr);
  failed($r,'Username, password and domain need to be specified.');      }
         return OK;      if ($symbstr) {
     }          $symbstr= &unescape($symbstr);
       }
 # split user logging in and "su"-user      if ($iptokenstr) {
           $iptokenstr = &unescape($iptokenstr);
     ($FORM{'uname'},$FORM{'suname'})=split(/\:/,$FORM{'uname'});      }
     $FORM{'uname'} =~ s/\W//g;      if ($rolestr =~ /^role=/) {
     $FORM{'suname'} =~ s/\W//g;          (undef,$form{'role'}) = split('=',$rolestr);
     $FORM{'udom'}  =~ s/\W//g;      }
       if ($symbstr =~ /^symb=/) {
     my $role   = $r->dir_config('lonRole');          (undef,$form{'symb'}) = split('=',$symbstr);
     my $domain = $r->dir_config('lonDefDomain');      }
     my $prodir = $r->dir_config('lonUsersDir');      if ($iptokenstr =~ /^iptoken=/) {
           (undef,$form{'iptoken'}) = split('=',$iptokenstr);
 # ---------------------------------------- Get the information from login token      }
   
     my $tmpinfo=Apache::lonnet::reply('tmpget:'.$FORM{'logtoken'},      my $upass = $ENV{HTTPS} ? $form{'upass0'}
                                       $FORM{'serverid'});          : &Apache::loncommon::des_decrypt($key,$form{'upass0'});
   
     if (($tmpinfo=~/^error/) || ($tmpinfo eq 'con_lost')) {  # ---------------------------------------------------------------- Authenticate
  failed($r,'Information needed to verify your login information is missing, inaccessible or expired.');  
         return OK;      my %domconfig = &Apache::lonnet::get_dom('configuration',['usercreation'],$form{'udom'});
     } else {      my ($cancreate,$statustocreate) =
         unless (&Apache::lonnet::reply('tmpdel:'.$FORM{'logtoken'},          &Apache::createaccount::get_creation_controls($form{'udom'},$domconfig{'usercreation'});
                                          $FORM{'serverid'}) eq 'ok') {      my $defaultauth;
             &failed($r,'Session could not be opened.');      if (ref($cancreate) eq 'ARRAY') {
  }          if (grep(/^login$/,@{$cancreate})) {
     }              $defaultauth = 1;
     my ($key,$firsturl)=split(/&/,$tmpinfo);          }
       }
     my $keybin=pack("H16",$key);      my $clientcancheckhost = 1;
       my $authhost=Apache::lonnet::authenticate($form{'uname'},$upass,
     my $cipher;                                                $form{'udom'},$defaultauth,
     if ($Crypt::DES::VERSION>=2.03) {                                                $clientcancheckhost);
  $cipher=new Crypt::DES $keybin;     
     }  # --------------------------------------------------------------------- Failed?
     else {  
  $cipher=new DES $keybin;      if ($authhost eq 'no_host') {
     }   &failed($r,'Username and/or password could not be authenticated.',
     my $upass='';   \%form);
     for (my $i=0;$i<=2;$i++) {          return OK;
  my $chunk=      } elsif ($authhost eq 'no_account_on_host') {
     $cipher->decrypt(unpack("a8",pack("H16",substr($FORM{'upass'.$i},0,16))));          if ($defaultauth) {
               my $domdesc = &Apache::lonnet::domain($form{'udom'},'description');
  $chunk.=              unless (&check_can_host($r,\%form,'no_account_on_host',$domdesc)) {
     $cipher->decrypt(unpack("a8",pack("H16",substr($FORM{'upass'.$i},16,16))));                  return OK;
               }
  $chunk=substr($chunk,1,ord(substr($chunk,0,1)));              my $start_page =
  $upass.=$chunk;                  &Apache::loncommon::start_page('Create a user account in LON-CAPA');
     }              my $lonhost = $r->dir_config('lonHostID');
               my $origmail = $Apache::lonnet::perlvar{'lonSupportEMail'};
 # ---------------------------------------------------------------- Authenticate              my $contacts =
     my $authhost=Apache::lonnet::authenticate($FORM{'uname'},                  &Apache::loncommon::build_recipient_list(undef,'helpdeskmail',
                                               $upass,                                                          $form{'udom'},$origmail);
                                               $FORM{'udom'});              my ($contact_email) = split(',',$contacts);
                   my $output =
 # --------------------------------------------------------------------- Failed?                  &Apache::createaccount::username_check($form{'uname'},$form{'udom'},
                                                          $domdesc,'',$lonhost,
     if ($authhost eq 'no_host') {                                                         $contact_email,$contact_name,
  failed($r,'Username and/or password could not be authenticated.');                                                         undef,$statustocreate);
         return OK;              &Apache::loncommon::content_type($r,'text/html');
     }              $r->send_http_header;
               &Apache::createaccount::print_header($r,$start_page);
     if (($firsturl eq '') ||               $r->print('<h3>'.&mt('Account creation').'</h3>'.
  ($firsturl=~/^\/adm\/(logout|remote)/)) {                        &mt('Although your username and password were authenticated, you do not currently have a LON-CAPA account at this institution.').'<br />'.
  $firsturl='/adm/roles';                        $output.&Apache::loncommon::end_page());
     }              return OK;
 # --------------------------------- Are we attempting to login as somebody else?          } else {
     if ($FORM{'suname'}) {              &failed($r,'Although your username and password were authenticated, you do not currently have a LON-CAPA account in this domain, and you are not permitted to create one.',\%form);
 # ------------ see if the original user has enough privileges to pull this stunt              return OK;
  if (&Apache::lonnet::privileged($FORM{'uname'},$FORM{'udom'})) {          }
 # ---------------------------------------------------- see if the su-user exists      }
     unless (&Apache::lonnet::homeserver($FORM{'suname'},$FORM{'udom'})  
  eq 'no_host') {      if (($firsturl eq '') ||
  &Apache::lonnet::logthis(&Apache::lonnet::homeserver($FORM{'suname'},$FORM{'udom'}));   ($firsturl=~/^\/adm\/(logout|remote)/)) {
 # ------------------------------ see if the su-user is not too highly privileged   $firsturl='/adm/roles';
  unless (&Apache::lonnet::privileged($FORM{'suname'},$FORM{'udom'})) {      }
 # -------------------------------------------------------- actually switch users  
     &Apache::lonnet::logperm('User '.$FORM{'uname'}.' at '.$FORM{'udom'}.      my $hosthere;
  ' logging in as '.$FORM{'suname'});      if ($form{'iptoken'}) {
     $FORM{'uname'}=$FORM{'suname'};          my %sessiondata = &Apache::lonnet::tmpget($form{'iptoken'});
  } else {          my $delete = &Apache::lonnet::tmpdel($form{'iptoken'});
     &Apache::lonnet::logthis('Attempted switch user to privileged user');          if (($sessiondata{'domain'} eq $form{'udom'}) &&
  }              ($sessiondata{'username'} eq $form{'uname'})) {
     }              $hosthere = 1;
  } else {          }
     &Apache::lonnet::logthis('Non-privileged user attempting switch user');      }
  }  
     }  # --------------------------------- Are we attempting to login as somebody else?
     &success($r,$FORM{'uname'},$FORM{'udom'},$authhost,$firsturl);      if ($form{'suname'}) {
     return OK;          my ($suname,$sudom,$sudomref);
 }          $suname = $form{'suname'};
           $sudom = $form{'udom'};
 1;          if ($form{'sudom'}) {
 __END__              unless ($sudom eq $form{'sudom'}) {
                   if (&Apache::lonnet::domain($form{'sudom'})) {
                       $sudomref = [$form{'sudom'}];
                       $sudom = $form{'sudom'};
                   }
               }
           }
   # ------------ see if the original user has enough privileges to pull this stunt
    if (&Apache::lonnet::privileged($form{'uname'},$form{'udom'},$sudomref)) {
   # ---------------------------------------------------- see if the su-user exists
       unless (&Apache::lonnet::homeserver($suname,$sudom) eq 'no_host') {
   # ------------------------------ see if the su-user is not too highly privileged
    if (&Apache::lonnet::privileged($suname,$sudom)) {
                       &Apache::lonnet::logthis('Attempted switch user to privileged user');
                   } else {
                       my $noprivswitch;
   #
   # su-user's home server and user's home server must have one of:
   # (a) same domain
   # (b) same primary library server for the two domains
   # (c) same "internet domain" for primary library server(s) for home servers' domains
   #
                       my $suprim = &Apache::lonnet::domain($sudom,'primary');
                       my $suintdom = &Apache::lonnet::internet_dom($suprim);
                       unless ($sudom eq $form{'udom'}) {
                           my $uprim = &Apache::lonnet::domain($form{'udom'},'primary');
                           my $uintdom = &Apache::lonnet::internet_dom($uprim);
                           unless ($suprim eq $uprim) {
                               unless ($suintdom eq $uintdom) {
                                   &Apache::lonnet::logthis('Attempted switch user '
                                      .'to user with different "internet domain".');                        
                                   $noprivswitch = 1;
                               }
                           }
                       }
   
                       unless ($noprivswitch) {
   #
   # server where log-in occurs must have same "internet domain" as su-user's home
   # server
   #
                           my $lonhost = $r->dir_config('lonHostID');
                           my $hostintdom = &Apache::lonnet::internet_dom($lonhost);
                           if ($hostintdom ne $suintdom) {
                               &Apache::lonnet::logthis('Attempted switch user on a '
                                   .'server with a different "internet domain".');
                           } else {
   
   # -------------------------------------------------------- actually switch users
   
               &Apache::lonnet::logperm('User '.$form{'uname'}.' at '.
                                 $form{'udom'}.' logging in as '.$suname.':'.$sudom);
               $form{'uname'}=$suname;
                               if ($form{'udom'} ne $sudom) {
                                   $form{'udom'}=$sudom;
                               }
                           }
                       }
    }
       }
    } else {
       &Apache::lonnet::logthis('Non-privileged user attempting switch user');
    }
       }
   
       my ($is_balancer,$otherserver);
   
       unless ($hosthere) {
           ($is_balancer,$otherserver) =
               &Apache::lonnet::check_loadbalancing($form{'uname'},$form{'udom'},'login');
           if ($is_balancer) {
               if ($otherserver eq '') {
                   my $lowest_load;
                   ($otherserver,undef,undef,undef,$lowest_load) = &Apache::lonnet::choose_server($form{'udom'});
                   if ($lowest_load > 100) {
                       $otherserver = &Apache::lonnet::spareserver($lowest_load,$lowest_load,1,$form{'udom'});
                   }
               }
               if ($otherserver ne '') {
                   my @hosts = &Apache::lonnet::current_machine_ids();
                   if (grep(/^\Q$otherserver\E$/,@hosts)) {
                       $hosthere = $otherserver;
                   }
               }
           }
       }
   
       if (($is_balancer) && (!$hosthere)) {
           if ($otherserver) {
               &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef,
                        \%form);
               my $switchto = '/adm/switchserver?otherserver='.$otherserver;
               if (($firsturl) && ($firsturl ne '/adm/switchserver') && ($firsturl ne '/adm/roles')) {
                   $switchto .= '&origurl='.$firsturl;
               }
               if ($form{'role'}) {
                   $switchto .= '&role='.$form{'role'};
               }
               if ($form{'symb'}) {
                   $switchto .= '&symb='.$form{'symb'};
               }
               $r->internal_redirect($switchto);
           } else {
               $r->print(&noswitch());
           }
           return OK;
       } else {
           if (!&check_can_host($r,\%form,$authhost)) {
               my ($otherserver) = &Apache::lonnet::choose_server($form{'udom'});
               if ($otherserver) {
                   &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef,
                            \%form);
                   my $switchto = '/adm/switchserver?otherserver='.$otherserver;
                   if (($firsturl) && ($firsturl ne '/adm/switchserver') && ($firsturl ne '/adm/roles')) {
                       $switchto .= '&origurl='.$firsturl;
                   }
                   if ($form{'role'}) {
                       $switchto .= '&role='.$form{'role'};
                   }
                   if ($form{'symb'}) {
                       $switchto .= '&symb='.$form{'symb'};
                   }
                   $r->internal_redirect($switchto);
               } else {
                   $r->print(&noswitch());
               }
               return OK;
           }
   
   # ------------------------------------------------------- Do the load balancing
   
   # ---------------------------------------------------------- Determine own load
           my $loadlim = $r->dir_config('lonLoadLim');
           my $loadavg;
           {
               my $loadfile=Apache::File->new('/proc/loadavg');
               $loadavg=<$loadfile>;
           }
           $loadavg =~ s/\s.*//g;
           my $loadpercent=sprintf("%.1f",100*$loadavg/$loadlim);
           my $userloadpercent=&Apache::lonnet::userload();
   
   # ---------------------------------------------------------- Are we overloaded?
           if ((($userloadpercent>100.0)||($loadpercent>100.0))) {
               my $unloaded=Apache::lonnet::spareserver($loadpercent,$userloadpercent,1,$form{'udom'});
               if (!$unloaded) {
                   ($unloaded) = &Apache::lonnet::choose_server($form{'udom'});
               }
               if ($unloaded) {
                   &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',
                            undef,\%form);
                   $r->internal_redirect('/adm/switchserver?otherserver='.$unloaded.'&origurl='.$firsturl);
                   return OK;
               }
           }
           if (($is_balancer) && ($hosthere)) {
               $form{'noloadbalance'} = $hosthere;
           }
           &success($r,$form{'uname'},$form{'udom'},$authhost,$firsturl,undef,
                    \%form);
           return OK;
       }
   }
   
   sub check_can_host {
       my ($r,$form,$authhost,$domdesc) = @_;
       return unless (ref($form) eq 'HASH');
       my $canhost = 1;
       my $lonhost = $r->dir_config('lonHostID');
       my $udom = $form->{'udom'};
       my @intdoms;
       my $internet_names = &Apache::lonnet::get_internet_names($lonhost);
       if (ref($internet_names) eq 'ARRAY') {
           @intdoms = @{$internet_names};
       }
       my $uprimary_id = &Apache::lonnet::domain($udom,'primary');
       my $uint_dom = &Apache::lonnet::internet_dom($uprimary_id);
       unless ($uint_dom ne '' && grep(/^\Q$uint_dom\E$/,@intdoms)) {
           my $machine_dom = &Apache::lonnet::host_domain($lonhost);
           my $hostname = &Apache::lonnet::hostname($lonhost);
           my $serverhomeID = &Apache::lonnet::get_server_homeID($hostname);
           my $serverhomedom = &Apache::lonnet::host_domain($serverhomeID);
           my %defdomdefaults = &Apache::lonnet::get_domain_defaults($serverhomedom);
           my %udomdefaults = &Apache::lonnet::get_domain_defaults($udom);
           my $loncaparev;
           if ($authhost eq 'no_account_on_host') {
               $loncaparev = &Apache::lonnet::get_server_loncaparev($machine_dom);
           } else {
               $loncaparev = &Apache::lonnet::get_server_loncaparev($machine_dom,$lonhost);
           }
           $canhost = &Apache::lonnet::can_host_session($udom,$lonhost,$loncaparev,
                                                        $udomdefaults{'remotesessions'},
                                                        $defdomdefaults{'hostedsessions'});
       }
       unless ($canhost) {
           if ($authhost eq 'no_account_on_host') {
               my $checkloginvia = 1;
               my ($login_host,$hostname) =
                   &Apache::lonnet::choose_server($udom,$checkloginvia);
               &Apache::loncommon::content_type($r,'text/html');
               $r->send_http_header;
               if ($login_host ne '') {
                   my $protocol = $Apache::lonnet::protocol{$login_host};
                   $protocol = 'http' if ($protocol ne 'https');
                   my $newurl = $protocol.'://'.$hostname.'/adm/createaccount';
                   $r->print(&Apache::loncommon::start_page('Create a user account in LON-CAPA').
                             '<h3>'.&mt('Account creation').'</h3>'.
                             &mt('You do not currently have a LON-CAPA account at this institution.').'<br />'.
                             '<p>'.&mt('You will be able to create one by logging into a LON-CAPA server within the [_1] domain.',$domdesc).'</p>'.
                             '<p>'.&mt('[_1]Log in[_2]','<a href="'.$newurl.'">','</a>').
                             &Apache::loncommon::end_page());
               } else {
                   $r->print(&Apache::loncommon::start_page('Access to LON-CAPA unavailable').
                             '<h3>'.&mt('Account creation unavailable').'</h3>'.
                             &mt('You do not currently have a LON-CAPA account at this institution.').'<br />'.
                             '<p>'.&mt('Currently a LON-CAPA server is not available within the [_1] domain for you to log-in to, to create an account.',$domdesc).'</p>'.
                             &Apache::loncommon::end_page());
               }
           } else {
               &success($r,$form->{'uname'},$udom,$authhost,'noredirect',undef,
                        $form);
               my ($otherserver) = &Apache::lonnet::choose_server($udom);
               $r->internal_redirect('/adm/switchserver?otherserver='.$otherserver);
           }
       }
       return $canhost;
   }
   
   sub noswitch {
       my $result = &Apache::loncommon::start_page('Access to LON-CAPA unavailable').
                    '<h3>'.&mt('Session unavailable').'</h3>'.
                    &mt('This LON-CAPA server is unable to host your session.').'<br />'.
                    '<p>'.&mt('Currently no other LON-CAPA server is available to host your session either.').'</p>'.
                    &Apache::loncommon::end_page();
       return $result;
   }
   
   sub loginhelpdisplay {
       my ($authdomain) = @_;
       my $login_help = 1;
       my $lang = &Apache::lonlocal::current_language();
       if ($login_help) {
           my $dom = $authdomain;
           if ($dom eq '') {
               $dom = &Apache::lonnet::default_login_domain();
           }
           my %domconfhash = &Apache::loncommon::get_domainconf($dom);
           my $loginhelp_url;
           if ($lang) {
               $loginhelp_url = $domconfhash{$dom.'.login.helpurl_'.$lang};
               if ($loginhelp_url ne '') {
                   return $loginhelp_url;
               }
           }
           $loginhelp_url = $domconfhash{$dom.'.login.helpurl_nolang'};
           if ($loginhelp_url ne '') {
               return $loginhelp_url;
           } else {
               return '/adm/loginproblems.html';
           }
       }
       return;
   }
   
   1;
   __END__
   
   
Removed from v.1.73  
changed lines
  Added in v.1.148

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