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Diff for /loncom/auth/loncacc.pm between versions 1.19 and 1.51

version 1.19, 2002/01/04 14:57:14 version 1.51, 2010/09/30 16:42:30
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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)
 # 6/15,16/11,22/11,  #
 # 01/06,01/11,6/1,9/25,9/28,11/22,12/25,12/26,  # $Id$
 # 01/06/01,05/04,05/05,05/09 Gerd Kortemeyer  #
   # 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 :methods);  use Apache::Constants qw(:common :http :methods REDIRECT);
 use Apache::File;  
 use CGI::Cookie();  
 use Fcntl qw(:flock);  use Fcntl qw(:flock);
   use Apache::lonlocal;
   use Apache::lonnet;
   use Apache::lonacc;
   use LONCAPA qw(:DEFAULT :match);
   
 sub constructaccess {  sub constructaccess {
     my ($url,$ownerdomain)=@_;      my ($url,$ownerdomain,$setpriv)=@_;
     my ($ownername)=($url=~/\/(?:\~|priv\/|home\/)(\w+)/);      my ($ownername)=($url=~/\/(?:\~|priv\/|home\/)($match_username)\//);
     unless (($ownername) && ($ownerdomain)) { return ''; }      unless (($ownername) && ($ownerdomain)) { return ''; }
       # We do not allow editing of previous versions of files.
     if (($ownername eq $ENV{'user.name'}) &&      if ($url=~/\.(\d+)\.(\w+)$/) { return ''; }
         ($ownerdomain eq $ENV{'user.domain'})) {      my @possibledomains = &Apache::lonnet::current_machine_domains();
  return ($ownername,$ownerdomain);      if ($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 $capriv='user.priv.ca./'.      my $then=$env{'user.login.time'};
                $ownerdomain.'/'.$ownername.'./'.      my %dcroles = ();
        $ownerdomain.'/'.$ownername;      if (&is_active_dc($ownerdomain,$then)) {
     map {          my %blocked=&Apache::lonnet::get('environment',['domcoord.author'],
         if ($_ eq $capriv) {                                           $ownerdomain,$ownername);
            return ($ownername,$ownerdomain);          unless ($blocked{'domcoord.author'} eq 'blocked') {
               if (grep(/^$ownerdomain$/,@possibledomains)) {
                   if ($setpriv) {
                       my $refresh=$env{'user.refresh.time'};
                       if (!$refresh) {
                           $refresh = $then;
                       }
                       my $now = time;
                       &Apache::lonnet::check_adhoc_privs($ownerdomain,$ownername,
                                                          $then,$refresh,$now,'ca',
                                                          'constructaccess');
                   }
                   return($ownername,$ownerdomain);
               }
         }          }
     } keys %ENV;      }
   
     return '';      return '';
 }  }
   
   sub is_active_dc {
       my ($ownerdomain,$then) = @_;
       my $livedc;
       if ($env{'user.adv'}) {
           my $domrole = $env{'user.role.dc./'.$ownerdomain.'/'};
           if ($domrole) {
               my ($tstart,$tend)=split(/\./,$domrole);
               $livedc = 1;
               if ($tstart && $tstart>$then) { undef($livedc); }
               if ($tend   && $tend  <$then) { 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 $cookie;  
     if ($lonid) {  
  my $handle=$lonid->value;  
         $handle=~s/\W//g;  
         my $lonidsdir=$r->dir_config('lonIDsDir');  
         if ((-e "$lonidsdir/$handle.id") && ($handle ne '')) {  
             my @profile;  
     {  
              my $idf=Apache::File->new("$lonidsdir/$handle.id");  
              flock($idf,LOCK_SH);  
              @profile=<$idf>;  
              $idf->close();  
     }  
             my $envi;  
             for ($envi=0;$envi<=$#profile;$envi++) {  
  chomp($profile[$envi]);  
  my ($envname,$envvalue)=split(/=/,$profile[$envi]);  
                 $ENV{$envname} = $envvalue;  
             }  
             $ENV{'user.environment'} = "$lonidsdir/$handle.id";  
             $ENV{'request.state'}    = "construct";  
             $ENV{'request.filename'} = $r->filename;  
   
             unless (&constructaccess($requrl,$r->dir_config('lonDefDomain'))) {  
                 $r->log_reason("Unauthorized $requrl", $r->filename);   
         return HTTP_NOT_ACCEPTABLE;  
             }  
   
 # -------------------------------------------------------- Load POST parameters      my $handle =  &Apache::lonnet::check_for_valid_session($r);
       if ($handle ne '') {
   
   # ------------------------------------------------------ Initialize Environment
           my $lonidsdir=$r->dir_config('lonIDsDir');
    &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);
   
         my $buffer;  # --------------------------------------------------------- Initialize Language
    
    &Apache::lonlocal::get_language_handle($r);
   
         $r->read($buffer,$r->header_in('Content-length'));  # -------------------------------------------------------------- Resource State
   
  unless ($buffer=~/^(\-+\w+)\s+Content\-Disposition\:\s*form\-data/si) {   $env{'request.state'}    = "construct";
             my @pairs=split(/&/,$buffer);   $env{'request.filename'} = $r->filename;
             my $pair;  
             foreach $pair (@pairs) {   unless (&constructaccess($requrl,$r->dir_config('lonDefDomain'),'setpriv')) {
                my ($name,$value) = split(/=/,$pair);      $r->log_reason("Unauthorized $requrl", $r->filename); 
                $value =~ tr/+/ /;      return HTTP_NOT_ACCEPTABLE;
                $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;  
                $name  =~ tr/+/ /;  
                $name  =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;  
                $ENV{"form.$name"}=$value;  
             }   
         } else {  
     my $contentsep=$1;  
             my @lines = split (/\n/,$buffer);  
             my $name='';  
             my $value='';  
             my $fname='';  
             my $fmime='';  
             my $i;  
             for ($i=0;$i<=$#lines;$i++) {  
  if ($lines[$i]=~/^$contentsep/) {  
     if ($name) {  
                         chomp($value);  
  if ($fname) {  
     $ENV{"form.$name.filename"}=$fname;  
                             $ENV{"form.$name.mimetype"}=$fmime;  
                         } else {  
                             $value=~s/\s+$//s;  
                         }  
                         $ENV{"form.$name"}=$value;  
                     }  
                     if ($i<$#lines) {  
  $i++;  
                         $lines[$i]=~  
  /Content\-Disposition\:\s*form\-data\;\s*name\=\"([^\"]+)\"/i;  
                         $name=$1;  
                         $value='';  
                         if ($lines[$i]=~/filename\=\"([^\"]+)\"/i) {  
    $fname=$1;  
                            if   
                             ($lines[$i+1]=~/Content\-Type\:\s*([\w\-\/]+)/i) {  
       $fmime=$1;  
                               $i++;  
    } else {  
                               $fmime='';  
                            }  
                         } else {  
     $fname='';  
                             $fmime='';  
                         }  
                         $i++;  
                     }  
                 } else {  
     $value.=$lines[$i]."\n";  
                 }  
             }  
  }   }
     $ENV{'request.method'}=$ENV{'REQUEST_METHOD'};  
             $r->method_number(M_GET);  # -------------------------------------------------------- Load POST parameters
     $r->method('GET');  
             $r->headers_in->unset('Content-length');   &Apache::lonacc::get_posted_cgi($r);
   
             return OK;    return OK; 
         } else {       } else { 
             $r->log_reason("Cookie $handle not valid", $r->filename)    $r->log_reason("Cookie $handle not valid", $r->filename) 
         };  
     }      }
   
 # ----------------------------------------------- Store where they wanted to go  # ----------------------------------------------- Store where they wanted to go
   
     $ENV{'request.firsturl'}=$requrl;      $env{'request.firsturl'}=$requrl;
     return FORBIDDEN;      return FORBIDDEN;
 }  }
   
Removed from v.1.19  
changed lines
  Added in v.1.51

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