Annotation of loncom/auth/loncacc.pm, revision 1.32

1.1       albertel    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)
1.20      www         4: #
1.32    ! www         5: # $Id: loncacc.pm,v 1.31 2003/09/20 17:44:22 www Exp $
1.20      www         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: # YEAR=2000
1.4       www        30: # 6/15,16/11,22/11,
1.20      www        31: # YEAR=2001
1.15      www        32: # 01/06,01/11,6/1,9/25,9/28,11/22,12/25,12/26,
1.16      www        33: # 01/06/01,05/04,05/05,05/09 Gerd Kortemeyer
1.20      www        34: # YEAR=2002
                     35: # 1/4 Gerd Kortemeyer
                     36: ###
1.1       albertel   37: 
                     38: package Apache::loncacc;
                     39: 
                     40: use strict;
1.26      www        41: use Apache::Constants qw(:common :http :methods REDIRECT);
1.7       www        42: use Apache::File;
1.1       albertel   43: use CGI::Cookie();
1.14      www        44: use Fcntl qw(:flock);
1.30      www        45: use Apache::lonlocal;
1.1       albertel   46: 
1.15      www        47: sub constructaccess {
                     48:     my ($url,$ownerdomain)=@_;
1.32    ! www        49:     my ($ownername)=($url=~/\/(?:\~|priv\/|home\/)(\w+)\//);
1.15      www        50:     unless (($ownername) && ($ownerdomain)) { return ''; }
1.24      matthew    51:     # We do not allow editing of previous versions of files.
                     52:     if ($url=~/\.(\d+)\.(\w+)$/) { return ''; }
1.15      www        53:     if (($ownername eq $ENV{'user.name'}) &&
                     54:         ($ownerdomain eq $ENV{'user.domain'})) {
                     55: 	return ($ownername,$ownerdomain);
                     56:     }
                     57: 
                     58:     my $capriv='user.priv.ca./'.
1.29      www        59:                $ownerdomain.'/'.$ownername.'./';
1.20      www        60:     foreach (keys %ENV) {
1.15      www        61:         if ($_ eq $capriv) {
                     62:            return ($ownername,$ownerdomain);
                     63:         }
1.20      www        64:     }
1.15      www        65:     return '';
                     66: }
                     67: 
1.1       albertel   68: sub handler {
                     69:     my $r = shift;
                     70:     my $requrl=$r->uri;
1.22      www        71:     $ENV{'request.editurl'}=$requrl;
1.1       albertel   72:     my %cookies=CGI::Cookie->parse($r->header_in('Cookie'));
                     73:     my $lonid=$cookies{'lonID'};
                     74:     my $cookie;
                     75:     if ($lonid) {
                     76: 	my $handle=$lonid->value;
                     77:         $handle=~s/\W//g;
                     78:         my $lonidsdir=$r->dir_config('lonIDsDir');
                     79:         if ((-e "$lonidsdir/$handle.id") && ($handle ne '')) {
1.28      www        80: 
                     81: # ------------------------------------------------------ Initialize Environment
                     82: 
                     83:             &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);
1.30      www        84: 
                     85: # --------------------------------------------------------- Initialize Language
                     86:  
1.31      www        87:  	    &Apache::lonlocal::get_language_handle($r);
1.28      www        88: 
                     89: # -------------------------------------------------------------- Resource State
                     90: 
1.9       www        91:             $ENV{'request.state'}    = "construct";
                     92:             $ENV{'request.filename'} = $r->filename;
1.15      www        93: 
                     94:             unless (&constructaccess($requrl,$r->dir_config('lonDefDomain'))) {
                     95:                 $r->log_reason("Unauthorized $requrl", $r->filename); 
                     96: 	        return HTTP_NOT_ACCEPTABLE;
1.26      www        97:             }
                     98: # Construction space needs Remote to work
                     99:             if ($ENV{'environment.remote'} eq 'off') {
                    100: 	        $r->content_type('text/html');
                    101:                 $r->header_out(Location => 
                    102:                     'http://'.$r->server->server_hostname.
                    103:                     '/adm/remote?action=launch&url='.
                    104:                     &Apache::lonnet::escape($requrl));
                    105:                 return REDIRECT;
1.15      www       106:             }
1.9       www       107: 
                    108: # -------------------------------------------------------- Load POST parameters
                    109: 
1.28      www       110: 	    &Apache::loncommon::get_posted_cgi($r);
1.8       www       111: 
1.1       albertel  112:             return OK; 
                    113:         } else { 
                    114:             $r->log_reason("Cookie $handle not valid", $r->filename) 
                    115:         };
                    116:     }
1.6       www       117: 
                    118: # ----------------------------------------------- Store where they wanted to go
                    119: 
                    120:     $ENV{'request.firsturl'}=$requrl;
1.1       albertel  121:     return FORBIDDEN;
                    122: }
                    123: 
                    124: 1;
                    125: __END__
                    126: 
1.20      www       127: =head1 NAME
                    128: 
                    129: Apache::lonacc - Cookie Based Access Handler for Construction Area
                    130: 
                    131: =head1 SYNOPSIS
                    132: 
1.23      albertel  133: Invoked (for various locations) by /etc/httpd/conf/loncapa_apache.conf:
1.20      www       134: 
                    135:  PerlAccessHandler       Apache::loncacc
                    136: 
                    137: =head1 INTRODUCTION
                    138: 
                    139: This module enables cookie based authentication for construction area
                    140: and is used to control access for three (essentially equivalent) URIs.
                    141: 
                    142:  <LocationMatch "^/priv.*">
                    143:  <LocationMatch "^/\~.*">
                    144:  <LocationMatch "^/\~.*/$">
                    145: 
                    146: Whenever the client sends the cookie back to the server, 
                    147: if the cookie is missing or invalid, the user is re-challenged
                    148: for login information.
                    149: 
                    150: This is part of the LearningOnline Network with CAPA project
                    151: described at http://www.lon-capa.org.
                    152: 
                    153: =head1 HANDLER SUBROUTINE
                    154: 
                    155: This routine is called by Apache and mod_perl.
                    156: 
                    157: =over 4
                    158: 
                    159: =item *
                    160: 
                    161: load POST parameters
                    162: 
                    163: =item *
                    164: 
                    165: store where they wanted to go (first url entered)
                    166: 
                    167: =back
                    168: 
                    169: =head1 OTHERSUBROUTINES
                    170: 
                    171: =over 4
                    172: 
                    173: =item *
                    174: 
                    175: constructaccess($url,$ownerdomain) : See if the owner domain and name
                    176: in the URL match those in the expected environment.  If so, return 
                    177: two element list ($ownername,$ownerdomain).  Else, return null string.
                    178: 
                    179: =back
                    180: 
                    181: =cut
1.1       albertel  182: 
                    183: 
                    184: 
                    185: 
                    186: 
                    187: 
                    188: 

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