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- got the logic backwards

    1: # The LearningOnline Network
    2: # Cookie Based Access Handler for Construction Area
    3: # (lonacc: 5/21/99,5/22,5/29,5/31 Gerd Kortemeyer)
    4: #
    5: # $Id: loncacc.pm,v 1.44 2007/02/01 07:13:04 albertel Exp $
    6: #
    7: # Copyright Michigan State University Board of Trustees
    8: #
    9: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
   10: #
   11: # LON-CAPA is free software; you can redistribute it and/or modify
   12: # it under the terms of the GNU General Public License as published by
   13: # the Free Software Foundation; either version 2 of the License, or
   14: # (at your option) any later version.
   15: #
   16: # LON-CAPA is distributed in the hope that it will be useful,
   17: # but WITHOUT ANY WARRANTY; without even the implied warranty of
   18: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   19: # GNU General Public License for more details.
   20: #
   21: # You should have received a copy of the GNU General Public License
   22: # along with LON-CAPA; if not, write to the Free Software
   23: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
   24: #
   25: # /home/httpd/html/adm/gpl.txt
   26: #
   27: # http://www.lon-capa.org/
   28: #
   29: 
   30: package Apache::loncacc;
   31: 
   32: use strict;
   33: use Apache::Constants qw(:common :http :methods REDIRECT);
   34: use CGI::Cookie();
   35: use Apache::lonlocal;
   36: use Apache::lonnet;
   37: use Apache::lonacc();
   38: use LONCAPA qw(:DEFAULT :match);
   39: 
   40: sub constructaccess {
   41:     my ($url,$ownerdomain)=@_;
   42:     my ($ownername)=($url=~m{/(?:\~|priv/|home/)($match_username)/});
   43:     unless (($ownername) && ($ownerdomain)) { return ''; }
   44:     # We do not allow editing of previous versions of files.
   45:     if ($url=~/\.(\d+)\.(\w+)$/) { return ''; }
   46:     my @possibledomains = &Apache::lonnet::current_machine_domains();
   47:     if ($ownername eq $env{'user.name'}) {
   48: 	foreach my $domain (@possibledomains) {
   49: 	    if ($domain eq $env{'user.domain'}) {
   50:     &Apache::lonnet::logthis("good1!");
   51: 		return ($ownername,$domain);
   52: 	    }
   53: 	}
   54:     }
   55:     foreach my $domain (@possibledomains) {
   56: 	if (exists($env{'user.priv.ca./'.$domain.'/'.$ownername.'./'}) ||
   57: 	    exists($env{'user.priv.aa./'.$domain.'/'.$ownername.'./'}) ) {
   58:     &Apache::lonnet::logthis("good2!");
   59: 	    return ($ownername,$domain);
   60: 	}
   61:     }
   62:     &Apache::lonnet::logthis("boo! hiss!");
   63:     return '';
   64: }
   65: 
   66: sub handler {
   67:     my $r = shift;
   68: 
   69:     my $requrl=$r->uri;
   70:     $env{'request.editurl'}=$requrl;
   71:     my %cookies=CGI::Cookie->parse($r->header_in('Cookie'));
   72:     my $lonid=$cookies{'lonID'};
   73:     my $cookie;
   74:     if ($lonid) {
   75:       	my $handle=&LONCAPA::clean_handle($lonid->value);
   76:         my $lonidsdir=$r->dir_config('lonIDsDir');
   77:         if ((-e "$lonidsdir/$handle.id") && ($handle ne '')) {
   78: 
   79: # ------------------------------------------------------ Initialize Environment
   80: 
   81:             &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);
   82: 
   83: # --------------------------------------------------------- Initialize Language
   84:  
   85:  	    &Apache::lonlocal::get_language_handle($r);
   86: 
   87: # -------------------------------------------------------------- Resource State
   88: 
   89:             $env{'request.state'}    = "construct";
   90:             $env{'request.filename'} = $r->filename;
   91: 
   92:             unless (&constructaccess($requrl,$r->dir_config('lonDefDomain'))) {
   93:                 $r->log_reason("Unauthorized $requrl", $r->filename); 
   94: 	        return HTTP_NOT_ACCEPTABLE;
   95:             }
   96: 
   97: # -------------------------------------------------------- Load POST parameters
   98: 
   99: 	    &Apache::lonacc::get_posted_cgi($r);
  100: 
  101:             return OK; 
  102:         } else { 
  103:             $r->log_reason("Cookie $handle not valid", $r->filename) 
  104:         };
  105:     }
  106: 
  107: # ----------------------------------------------- Store where they wanted to go
  108: 
  109:     $env{'request.firsturl'}=$requrl;
  110:     return FORBIDDEN;
  111: }
  112: 
  113: 1;
  114: __END__
  115: 
  116: =head1 NAME
  117: 
  118: Apache::lonacc - Cookie Based Access Handler for Construction Area
  119: 
  120: =head1 SYNOPSIS
  121: 
  122: Invoked (for various locations) by /etc/httpd/conf/loncapa_apache.conf:
  123: 
  124:  PerlAccessHandler       Apache::loncacc
  125: 
  126: =head1 INTRODUCTION
  127: 
  128: This module enables cookie based authentication for construction area
  129: and is used to control access for three (essentially equivalent) URIs.
  130: 
  131:  <LocationMatch "^/priv.*">
  132:  <LocationMatch "^/\~.*">
  133:  <LocationMatch "^/\~.*/$">
  134: 
  135: Whenever the client sends the cookie back to the server, 
  136: if the cookie is missing or invalid, the user is re-challenged
  137: for login information.
  138: 
  139: This is part of the LearningOnline Network with CAPA project
  140: described at http://www.lon-capa.org.
  141: 
  142: =head1 HANDLER SUBROUTINE
  143: 
  144: This routine is called by Apache and mod_perl.
  145: 
  146: =over 4
  147: 
  148: =item *
  149: 
  150: load POST parameters
  151: 
  152: =item *
  153: 
  154: store where they wanted to go (first url entered)
  155: 
  156: =back
  157: 
  158: =head1 OTHERSUBROUTINES
  159: 
  160: =over 4
  161: 
  162: =item *
  163: 
  164: constructaccess($url,$ownerdomain) : See if the owner domain and name
  165: in the URL match those in the expected environment.  If so, return 
  166: two element list ($ownername,$ownerdomain).  Else, return null string.
  167: 
  168: =back
  169: 
  170: =cut
  171: 
  172: 
  173: 
  174: 
  175: 
  176: 
  177: