Annotation of loncom/auth/loncacc.pm, revision 1.41

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: #
1.41    ! albertel    5: # $Id: loncacc.pm,v 1.40 2005/07/12 07:00:28 albertel 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: #
1.1       albertel   29: 
                     30: package Apache::loncacc;
                     31: 
                     32: use strict;
1.26      www        33: use Apache::Constants qw(:common :http :methods REDIRECT);
1.1       albertel   34: use CGI::Cookie();
1.14      www        35: use Fcntl qw(:flock);
1.30      www        36: use Apache::lonlocal;
1.38      albertel   37: use Apache::lonnet;
1.41    ! albertel   38: use Apache::lonacc;
1.1       albertel   39: 
1.15      www        40: sub constructaccess {
                     41:     my ($url,$ownerdomain)=@_;
1.32      www        42:     my ($ownername)=($url=~/\/(?:\~|priv\/|home\/)(\w+)\//);
1.15      www        43:     unless (($ownername) && ($ownerdomain)) { return ''; }
1.24      matthew    44:     # We do not allow editing of previous versions of files.
                     45:     if ($url=~/\.(\d+)\.(\w+)$/) { return ''; }
1.33      albertel   46:     my @possibledomains = &Apache::lonnet::current_machine_domains();
1.38      albertel   47:     if ($ownername eq $env{'user.name'}) {
1.33      albertel   48: 	foreach my $domain (@possibledomains) {
1.38      albertel   49: 	    if ($domain eq $env{'user.domain'}) {
1.33      albertel   50: 		return ($ownername,$domain);
                     51: 	    }
                     52: 	}
1.15      www        53:     }
1.33      albertel   54:     
                     55:     foreach my $domain (@possibledomains) {
1.40      albertel   56: 	if (exists($env{'user.priv.ca./'.$domain.'/'.$ownername.'./'}) ||
                     57: 	    exists($env{'user.priv.aa./'.$domain.'/'.$ownername.'./'}) ) {
                     58: 	    return ($ownername,$domain);
1.39      www        59: 	}
1.20      www        60:     }
1.15      www        61:     return '';
                     62: }
                     63: 
1.1       albertel   64: sub handler {
                     65:     my $r = shift;
                     66:     my $requrl=$r->uri;
1.38      albertel   67:     $env{'request.editurl'}=$requrl;
1.1       albertel   68:     my %cookies=CGI::Cookie->parse($r->header_in('Cookie'));
                     69:     my $lonid=$cookies{'lonID'};
                     70:     my $cookie;
                     71:     if ($lonid) {
                     72: 	my $handle=$lonid->value;
                     73:         $handle=~s/\W//g;
                     74:         my $lonidsdir=$r->dir_config('lonIDsDir');
                     75:         if ((-e "$lonidsdir/$handle.id") && ($handle ne '')) {
1.28      www        76: 
                     77: # ------------------------------------------------------ Initialize Environment
                     78: 
                     79:             &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);
1.30      www        80: 
                     81: # --------------------------------------------------------- Initialize Language
                     82:  
1.31      www        83:  	    &Apache::lonlocal::get_language_handle($r);
1.28      www        84: 
                     85: # -------------------------------------------------------------- Resource State
                     86: 
1.38      albertel   87:             $env{'request.state'}    = "construct";
                     88:             $env{'request.filename'} = $r->filename;
1.15      www        89: 
                     90:             unless (&constructaccess($requrl,$r->dir_config('lonDefDomain'))) {
                     91:                 $r->log_reason("Unauthorized $requrl", $r->filename); 
                     92: 	        return HTTP_NOT_ACCEPTABLE;
1.26      www        93:             }
1.9       www        94: 
                     95: # -------------------------------------------------------- Load POST parameters
                     96: 
1.41    ! albertel   97: 	    &Apache::lonacc::get_posted_cgi($r);
1.8       www        98: 
1.1       albertel   99:             return OK; 
                    100:         } else { 
                    101:             $r->log_reason("Cookie $handle not valid", $r->filename) 
                    102:         };
                    103:     }
1.6       www       104: 
                    105: # ----------------------------------------------- Store where they wanted to go
                    106: 
1.38      albertel  107:     $env{'request.firsturl'}=$requrl;
1.1       albertel  108:     return FORBIDDEN;
                    109: }
                    110: 
                    111: 1;
                    112: __END__
                    113: 
1.20      www       114: =head1 NAME
                    115: 
                    116: Apache::lonacc - Cookie Based Access Handler for Construction Area
                    117: 
                    118: =head1 SYNOPSIS
                    119: 
1.23      albertel  120: Invoked (for various locations) by /etc/httpd/conf/loncapa_apache.conf:
1.20      www       121: 
                    122:  PerlAccessHandler       Apache::loncacc
                    123: 
                    124: =head1 INTRODUCTION
                    125: 
                    126: This module enables cookie based authentication for construction area
                    127: and is used to control access for three (essentially equivalent) URIs.
                    128: 
                    129:  <LocationMatch "^/priv.*">
                    130:  <LocationMatch "^/\~.*">
                    131:  <LocationMatch "^/\~.*/$">
                    132: 
                    133: Whenever the client sends the cookie back to the server, 
                    134: if the cookie is missing or invalid, the user is re-challenged
                    135: for login information.
                    136: 
                    137: This is part of the LearningOnline Network with CAPA project
                    138: described at http://www.lon-capa.org.
                    139: 
                    140: =head1 HANDLER SUBROUTINE
                    141: 
                    142: This routine is called by Apache and mod_perl.
                    143: 
                    144: =over 4
                    145: 
                    146: =item *
                    147: 
                    148: load POST parameters
                    149: 
                    150: =item *
                    151: 
                    152: store where they wanted to go (first url entered)
                    153: 
                    154: =back
                    155: 
                    156: =head1 OTHERSUBROUTINES
                    157: 
                    158: =over 4
                    159: 
                    160: =item *
                    161: 
                    162: constructaccess($url,$ownerdomain) : See if the owner domain and name
                    163: in the URL match those in the expected environment.  If so, return 
                    164: two element list ($ownername,$ownerdomain).  Else, return null string.
                    165: 
                    166: =back
                    167: 
                    168: =cut
1.1       albertel  169: 
                    170: 
                    171: 
                    172: 
                    173: 
                    174: 
                    175: 

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