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Diff for /loncom/auth/loncacc.pm between versions 1.5 and 1.42

version 1.5, 2000/01/14 21:12:40 version 1.42, 2006/11/23 01:49:41
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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 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/
   #
   
 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 CGI::Cookie();
   use Fcntl qw(:flock);
   use Apache::lonlocal;
   use Apache::lonnet;
   use Apache::lonacc;
   
   sub constructaccess {
       my ($url,$ownerdomain)=@_;
       my ($ownername)=($url=~/\/(?:\~|priv\/|home\/)(\w+)\//);
       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);
    }
       }
       return '';
   }
   
 sub handler {  sub handler {
     my $r = shift;      my $r = shift;
     my $requrl=$r->uri;      my $requrl=$r->uri;
       $env{'request.editurl'}=$requrl;
     my %cookies=CGI::Cookie->parse($r->header_in('Cookie'));      my %cookies=CGI::Cookie->parse($r->header_in('Cookie'));
     my $lonid=$cookies{'lonID'};      my $lonid=$cookies{'lonID'};
     my $cookie;      my $cookie;
     if ($lonid) {      if ($lonid) {
  my $handle=$lonid->value;        my $handle=&LONCAPA::clean_handle($lonid->value);
         $handle=~s/\W//g;  
         my $lonidsdir=$r->dir_config('lonIDsDir');          my $lonidsdir=$r->dir_config('lonIDsDir');
         if ((-e "$lonidsdir/$handle.id") && ($handle ne '')) {          if ((-e "$lonidsdir/$handle.id") && ($handle ne '')) {
             my $ownername=$requrl;  
             $ownername=~s/\/\~(\w+).*/\1/;  # ------------------------------------------------------ Initialize Environment
             my $ownerdomain=$r->dir_config('lonDefDomain');  
             my @handleparts=split(/\_/,$handle);              &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);
             my $username=$handleparts[0];  
             my $domain=$handleparts[2];  # --------------------------------------------------------- Initialize Language
             if (($username ne $ownername) || ($domain ne $ownerdomain)) {   
                 $r->log_reason       &Apache::lonlocal::get_language_handle($r);
                    ("$username at $domain not authorized", $r->filename);   
   # -------------------------------------------------------------- Resource State
   
               $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;          return HTTP_NOT_ACCEPTABLE;
             }              }
             my @profile;  
     {  # -------------------------------------------------------- Load POST parameters
              my $idf=Apache::File->new("$lonidsdir/$handle.id");  
              @profile=<$idf>;      &Apache::lonacc::get_posted_cgi($r);
     }  
             my $envi;  
             for ($envi=0;$envi<=$#profile;$envi++) {  
  chomp($profile[$envi]);  
  my ($envname,$envvalue)=split(/=/,$profile[$envi]);  
                 $r->subprocess_env("$envname" => "$envvalue");  
             }  
             $r->subprocess_env("user.environment" => "$lonidsdir/$handle.id",  
                                "request.state"    => "construct",  
                                "request.filename" => $r->filename);  
             my $buffer;  
             $r->read($buffer,$r->header_in('Content-length'));  
             my @pairs=split(/&/,$buffer);  
             my $pair; my $name; my $value;  
             foreach $pair (@pairs) {  
                ($name,$value) = split(/=/,$pair);  
                $r->subprocess_env("form.$name" => $value);  
             }   
             return OK;               return OK; 
         } else {           } else { 
             $r->log_reason("Cookie $handle not valid", $r->filename)               $r->log_reason("Cookie $handle not valid", $r->filename) 
         };          };
     }      }
     $cookie=CGI::Cookie->new(-name  => 'lonURL',  
                              -value => $requrl,   # ----------------------------------------------- Store where they wanted to go
                              -path  => '/');  
     $r->err_headers_out->add('Set-Cookie' => $cookie);      $env{'request.firsturl'}=$requrl;
     return FORBIDDEN;      return FORBIDDEN;
 }  }
   
 1;  1;
 __END__  __END__
   
   =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 4
   
   =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
   
   
   
Removed from v.1.5  
changed lines
  Added in v.1.42

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