Annotation of loncom/auth/loncacc.pm, revision 1.57
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: #
1.57 ! raeburn 5: # $Id: loncacc.pm,v 1.56 2011/10/25 18:37:11 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: #
1.1 albertel 29:
1.47 jms 30: =pod
31:
32: =head1 NAME
33:
34: Apache::lonacc - Cookie Based Access Handler for Construction Area
35:
36: =head1 SYNOPSIS
37:
38: Invoked (for various locations) by /etc/httpd/conf/loncapa_apache.conf:
39:
40: PerlAccessHandler Apache::loncacc
41:
42: =head1 INTRODUCTION
43:
44: This module enables cookie based authentication for construction area
1.57 ! raeburn 45: and is used to control access for the following two types of URI
! 46: (one for files, and one for directories):
1.47 jms 47:
48: <LocationMatch "^/priv.*">
1.57 ! raeburn 49: <LocationMatch "^/priv.*/$">
1.47 jms 50:
51: Whenever the client sends the cookie back to the server,
52: if the cookie is missing or invalid, the user is re-challenged
53: for login information.
54:
55: This is part of the LearningOnline Network with CAPA project
56: described at http://www.lon-capa.org.
57:
58: =head1 HANDLER SUBROUTINE
59:
60: This routine is called by Apache and mod_perl.
61:
62: =over 4
63:
64: =item *
65:
66: load POST parameters
67:
68: =item *
69:
70: store where they wanted to go (first url entered)
71:
72: =back
73:
74: =head1 OTHERSUBROUTINES
75:
1.48 jms 76: =over
1.47 jms 77:
1.55 www 78: =item constructaccess($url,$setpriv)
1.47 jms 79:
1.48 jms 80: See if the owner domain and name
1.47 jms 81: in the URL match those in the expected environment. If so, return
82: two element list ($ownername,$ownerdomain). Else, return null string.
1.55 www 83: If 'setpriv' is set to 'setpriv', it actually assigns the privileges.
1.47 jms 84: =back
85:
86: =cut
87:
88:
1.1 albertel 89: package Apache::loncacc;
90:
91: use strict;
1.26 www 92: use Apache::Constants qw(:common :http :methods REDIRECT);
1.45 albertel 93: use Fcntl qw(:flock);
1.30 www 94: use Apache::lonlocal;
1.38 albertel 95: use Apache::lonnet;
1.45 albertel 96: use Apache::lonacc;
1.43 albertel 97: use LONCAPA qw(:DEFAULT :match);
1.1 albertel 98:
1.15 www 99: sub constructaccess {
1.54 www 100: my ($url,$setpriv)=@_;
101:
102: # We do not allow editing of previous versions of files
103: if ($url=~/\.(\d+)\.(\w+)$/) { return ''; }
104:
105: # Get username and domain from URL
1.57 ! raeburn 106: my $londocroot = $Apache::lonnet::perlvar{'lonDocRoot'};
! 107: my ($ownerdomain,$ownername)=($url=~ m{^(?:\Q$londocroot\E|)/priv/($match_domain)/($match_username)/});
1.54 www 108:
109: # The URL does not really point to any authorspace, forget it
1.15 www 110: unless (($ownername) && ($ownerdomain)) { return ''; }
1.54 www 111:
112: # Now we need to see if the user has access to the authorspace of
113: # $ownername at $ownerdomain
114:
115: if (($ownername eq $env{'user.name'}) && ($ownerdomain eq $env{'user.domain'})) {
116: # Real author for this?
117: if (exists($env{'user.priv.au./'.$ownerdomain.'/./'})) {
118: return ($ownername,$ownerdomain);
119: }
120: } else {
121: # Co-author for this?
122: if (exists($env{'user.priv.ca./'.$ownerdomain.'/'.$ownername.'./'}) ||
123: exists($env{'user.priv.aa./'.$ownerdomain.'/'.$ownername.'./'}) ) {
124: return ($ownername,$ownerdomain);
1.39 www 125: }
1.20 www 126: }
1.54 www 127: # We don't have any access right now. If we are not possibly going to do anything about this,
128: # we might as well leave
129: unless ($setpriv) { return ''; }
130:
131: # Backdoor access?
132: my $allowed=&Apache::lonnet::allowed('eco',$ownerdomain);
133: # Nope
134: unless ($allowed) { return ''; }
135: # Looks like we may have access, but could be locked by the owner of the construction space
136: if ($allowed eq 'U') {
1.49 raeburn 137: my %blocked=&Apache::lonnet::get('environment',['domcoord.author'],
138: $ownerdomain,$ownername);
1.54 www 139: # Is blocked by owner
140: if ($blocked{'domcoord.author'} eq 'blocked') { return ''; }
1.49 raeburn 141: }
1.54 www 142: if (($allowed eq 'F') || ($allowed eq 'U')) {
143: # Grant temporary access
144: my $then=$env{'user.login.time'};
145: my $update==$env{'user.update.time'};
146: if (!$update) { $update = $then; }
147: my $refresh=$env{'user.refresh.time'};
148: if (!$refresh) { $refresh = $update; }
149: my $now = time;
150: &Apache::lonnet::check_adhoc_privs($ownerdomain,$ownername,
151: $update,$refresh,$now,'ca',
152: 'constructaccess');
153: return($ownername,$ownerdomain);
154: }
155: # No business here
1.15 www 156: return '';
157: }
158:
1.1 albertel 159: sub handler {
160: my $r = shift;
161: my $requrl=$r->uri;
1.38 albertel 162: $env{'request.editurl'}=$requrl;
1.46 albertel 163:
164: my $handle = &Apache::lonnet::check_for_valid_session($r);
165: if ($handle ne '') {
1.28 www 166:
167: # ------------------------------------------------------ Initialize Environment
1.46 albertel 168: my $lonidsdir=$r->dir_config('lonIDsDir');
169: &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);
1.30 www 170:
171: # --------------------------------------------------------- Initialize Language
172:
1.46 albertel 173: &Apache::lonlocal::get_language_handle($r);
1.28 www 174:
175: # -------------------------------------------------------------- Resource State
176:
1.46 albertel 177: $env{'request.state'} = "construct";
178: $env{'request.filename'} = $r->filename;
1.15 www 179:
1.54 www 180: unless (&constructaccess($requrl,'setpriv')) {
1.46 albertel 181: $r->log_reason("Unauthorized $requrl", $r->filename);
182: return HTTP_NOT_ACCEPTABLE;
183: }
1.9 www 184:
185: # -------------------------------------------------------- Load POST parameters
186:
1.46 albertel 187: &Apache::lonacc::get_posted_cgi($r);
1.8 www 188:
1.46 albertel 189: return OK;
190: } else {
191: $r->log_reason("Cookie $handle not valid", $r->filename)
1.1 albertel 192: }
1.6 www 193:
194: # ----------------------------------------------- Store where they wanted to go
195:
1.38 albertel 196: $env{'request.firsturl'}=$requrl;
1.1 albertel 197: return FORBIDDEN;
198: }
199:
200: 1;
201: __END__
202:
203:
204:
205:
206:
207:
208:
209:
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