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Diff for /loncom/auth/loncacc.pm between versions 1.3 and 1.53

version 1.3, 1999/11/22 17:23:13 version 1.53, 2011/09/27 20:28:38
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 # The LearningOnline Network  # The LearningOnline Network
 # Cookie Based Access Handler for Construction Area  # Cookie Based Access Handler for Construction Area
 # (lonacc: 5/21/99,5/22,5/29,5/31 Gerd Kortemeyer)  # (lonacc: 5/21/99,5/22,5/29,5/31 Gerd Kortemeyer)
 # 6/15,16/11 Gerd Kortemeyer  #
   # $Id$
   #
   # Copyright Michigan State University Board of Trustees
   #
   # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
   #
   # 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
   # the Free Software Foundation; either version 2 of the License, or
   # (at your option) any later version.
   #
   # LON-CAPA is distributed in the hope that it will be useful,
   # but WITHOUT ANY WARRANTY; without even the implied warranty of
   # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   # GNU General Public License for more details.
   #
   # You should have received a copy of the GNU General Public License
   # along with LON-CAPA; if not, write to the Free Software
   # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
   #
   # /home/httpd/html/adm/gpl.txt
   #
   # http://www.lon-capa.org/
   #
   
   =pod
   
   =head1 NAME
   
   Apache::lonacc - Cookie Based Access Handler for Construction Area
   
   =head1 SYNOPSIS
   
   Invoked (for various locations) by /etc/httpd/conf/loncapa_apache.conf:
   
    PerlAccessHandler       Apache::loncacc
   
   =head1 INTRODUCTION
   
   This module enables cookie based authentication for construction area
   and is used to control access for three (essentially equivalent) URIs.
   
    <LocationMatch "^/priv.*">
    <LocationMatch "^/\~.*">
    <LocationMatch "^/\~.*/$">
   
   Whenever the client sends the cookie back to the server, 
   if the cookie is missing or invalid, the user is re-challenged
   for login information.
   
   This is part of the LearningOnline Network with CAPA project
   described at http://www.lon-capa.org.
   
   =head1 HANDLER SUBROUTINE
   
   This routine is called by Apache and mod_perl.
   
   =over 4
   
   =item *
   
   load POST parameters
   
   =item *
   
   store where they wanted to go (first url entered)
   
   =back
   
   =head1 OTHERSUBROUTINES
   
   =over
   
   =item constructaccess($url,$ownerdomain)
   
   See if the owner domain and name
   in the URL match those in the expected environment.  If so, return 
   two element list ($ownername,$ownerdomain).  Else, return null string.
   
   =back
   
   =cut
   
   
 package Apache::loncacc;  package Apache::loncacc;
   
 use strict;  use strict;
 use Apache::Constants qw(:common :http);  use Apache::Constants qw(:common :http :methods REDIRECT);
 use CGI::Cookie();  use Fcntl qw(:flock);
   use Apache::lonlocal;
   use Apache::lonnet;
   use Apache::lonacc;
   use LONCAPA qw(:DEFAULT :match);
   
   sub constructaccess {
       my ($url,$ownerdomain,$setpriv)=@_;
       my ($ownername)=($url=~/\/(?:\~|priv\/|home\/)($match_username)\//);
       unless (($ownername) && ($ownerdomain)) { return ''; }
       # We do not allow editing of previous versions of files.
       if ($url=~/\.(\d+)\.(\w+)$/) { return ''; }
       my @possibledomains = &Apache::lonnet::current_machine_domains();
       if ($ownername eq $env{'user.name'}) {
    foreach my $domain (@possibledomains) {
       if ($domain eq $env{'user.domain'}) {
    return ($ownername,$domain);
       }
    }
       }
       
       foreach my $domain (@possibledomains) {
    if (exists($env{'user.priv.ca./'.$domain.'/'.$ownername.'./'}) ||
       exists($env{'user.priv.aa./'.$domain.'/'.$ownername.'./'}) ) {
       return ($ownername,$domain);
    }
       }
   
       my $then=$env{'user.login.time'};
       my $update==$env{'user.update.time'};
       if (!$update) {
           $update = $then;
       }
       my %dcroles = ();
       if (&is_active_dc($ownerdomain,$update)) {
           my %blocked=&Apache::lonnet::get('environment',['domcoord.author'],
                                            $ownerdomain,$ownername);
           unless ($blocked{'domcoord.author'} eq 'blocked') {
               if (grep(/^$ownerdomain$/,@possibledomains)) {
                   if ($setpriv) {
                       my $refresh=$env{'user.refresh.time'};
                       if (!$refresh) {
                           $refresh = $update;
                       }
                       my $now = time;
                       &Apache::lonnet::check_adhoc_privs($ownerdomain,$ownername,
                                                          $update,$refresh,$now,'ca',
                                                          'constructaccess');
                   }
                   return($ownername,$ownerdomain);
               }
           }
       }
       return '';
   }
   
   sub is_active_dc {
       my ($ownerdomain,$update) = @_;
       my $livedc;
       if ($env{'user.adv'}) {
           my $domrole = $env{'user.role.dc./'.$ownerdomain.'/'};
           if ($domrole) {
               my ($tstart,$tend)=split(/\./,$domrole);
               $livedc = 1;
               if ($tstart && $tstart>$update) { undef($livedc); }
               if ($tend   && $tend  <$update) { undef($livedc); }
           }
       }
       return $livedc;
   }
   
   
 sub handler {  sub handler {
     my $r = shift;      my $r = shift;
     my $requrl=$r->uri;      my $requrl=$r->uri;
     my %cookies=CGI::Cookie->parse($r->header_in('Cookie'));      $env{'request.editurl'}=$requrl;
     my $lonid=$cookies{'lonID'};  
     my $cookie;      my $handle =  &Apache::lonnet::check_for_valid_session($r);
     if ($lonid) {      if ($handle ne '') {
  my $handle=$lonid->value;  
         $handle=~s/\W//g;  # ------------------------------------------------------ Initialize Environment
         my $lonidsdir=$r->dir_config('lonIDsDir');          my $lonidsdir=$r->dir_config('lonIDsDir');
         if ((-e "$lonidsdir/$handle.id") && ($handle ne '')) {   &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);
             my $ownername=$requrl;  
             $ownername=~s/\/\~(\w+).*/\1/;  # --------------------------------------------------------- Initialize Language
             my $ownerdomain=$r->dir_config('lonDefDomain');   
             my @handleparts=split(/\_/,$handle);   &Apache::lonlocal::get_language_handle($r);
             my $username=$handleparts[0];  
             my $domain=$handleparts[2];  # -------------------------------------------------------------- Resource State
             if (($username ne $ownername) || ($domain ne $ownerdomain)) {  
                 $r->log_reason   $env{'request.state'}    = "construct";
                    ("$username at $domain not authorized", $r->filename);    $env{'request.filename'} = $r->filename;
         return HTTP_NOT_ACCEPTABLE;  
             }   unless (&constructaccess($requrl,$r->dir_config('lonDefDomain'),'setpriv')) {
             my @profile;      $r->log_reason("Unauthorized $requrl", $r->filename); 
     {      return HTTP_NOT_ACCEPTABLE;
              my $idf=Apache::File->new("$lonidsdir/$handle.id");   }
              @profile=<$idf>;  
     }  # -------------------------------------------------------- Load POST parameters
             my $envi;  
             for ($envi=0;$envi<=$#profile;$envi++) {   &Apache::lonacc::get_posted_cgi($r);
  chomp($profile[$envi]);  
  my ($envname,$envvalue)=split(/=/,$profile[$envi]);   return OK; 
                 $r->subprocess_env("profile.$envname" => "$envvalue");      } else { 
             }   $r->log_reason("Cookie $handle not valid", $r->filename) 
             $r->subprocess_env("user.environment" => "$lonidsdir/$handle.id");      }
             $r->subprocess_env("request.state" => "construct");  
             return OK;   # ----------------------------------------------- Store where they wanted to go
         } else {   
             $r->log_reason("Cookie $handle not valid", $r->filename)       $env{'request.firsturl'}=$requrl;
         };  
     }  
     $cookie=CGI::Cookie->new(-name  => 'lonURL',  
                              -value => $requrl,   
                              -path  => '/');  
     $r->err_headers_out->add('Set-Cookie' => $cookie);  
     return FORBIDDEN;      return FORBIDDEN;
 }  }
   
Removed from v.1.3  
changed lines
  Added in v.1.53

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