Annotation of loncom/auth/loncacc.pm, revision 1.51
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: #
1.51 ! raeburn 5: # $Id: loncacc.pm,v 1.50 2009/10/07 14:47:48 raeburn 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
45: and is used to control access for three (essentially equivalent) URIs.
46:
47: <LocationMatch "^/priv.*">
48: <LocationMatch "^/\~.*">
49: <LocationMatch "^/\~.*/$">
50:
51: Whenever the client sends the cookie back to the server,
52: if the cookie is missing or invalid, the user is re-challenged
53: for login information.
54:
55: This is part of the LearningOnline Network with CAPA project
56: described at http://www.lon-capa.org.
57:
58: =head1 HANDLER SUBROUTINE
59:
60: This routine is called by Apache and mod_perl.
61:
62: =over 4
63:
64: =item *
65:
66: load POST parameters
67:
68: =item *
69:
70: store where they wanted to go (first url entered)
71:
72: =back
73:
74: =head1 OTHERSUBROUTINES
75:
1.48 jms 76: =over
1.47 jms 77:
1.48 jms 78: =item constructaccess($url,$ownerdomain)
1.47 jms 79:
1.48 jms 80: See if the owner domain and name
1.47 jms 81: in the URL match those in the expected environment. If so, return
82: two element list ($ownername,$ownerdomain). Else, return null string.
83:
84: =back
85:
86: =cut
87:
88:
1.1 albertel 89: package Apache::loncacc;
90:
91: use strict;
1.26 www 92: use Apache::Constants qw(:common :http :methods REDIRECT);
1.45 albertel 93: use Fcntl qw(:flock);
1.30 www 94: use Apache::lonlocal;
1.38 albertel 95: use Apache::lonnet;
1.45 albertel 96: use Apache::lonacc;
1.43 albertel 97: use LONCAPA qw(:DEFAULT :match);
1.1 albertel 98:
1.15 www 99: sub constructaccess {
1.49 raeburn 100: my ($url,$ownerdomain,$setpriv)=@_;
1.45 albertel 101: my ($ownername)=($url=~/\/(?:\~|priv\/|home\/)($match_username)\//);
1.15 www 102: unless (($ownername) && ($ownerdomain)) { return ''; }
1.24 matthew 103: # We do not allow editing of previous versions of files.
104: if ($url=~/\.(\d+)\.(\w+)$/) { return ''; }
1.33 albertel 105: my @possibledomains = &Apache::lonnet::current_machine_domains();
1.38 albertel 106: if ($ownername eq $env{'user.name'}) {
1.33 albertel 107: foreach my $domain (@possibledomains) {
1.38 albertel 108: if ($domain eq $env{'user.domain'}) {
1.33 albertel 109: return ($ownername,$domain);
110: }
111: }
1.15 www 112: }
1.45 albertel 113:
1.33 albertel 114: foreach my $domain (@possibledomains) {
1.40 albertel 115: if (exists($env{'user.priv.ca./'.$domain.'/'.$ownername.'./'}) ||
116: exists($env{'user.priv.aa./'.$domain.'/'.$ownername.'./'}) ) {
117: return ($ownername,$domain);
1.39 www 118: }
1.20 www 119: }
1.49 raeburn 120:
121: my $then=$env{'user.login.time'};
122: my %dcroles = ();
123: if (&is_active_dc($ownerdomain,$then)) {
124: my %blocked=&Apache::lonnet::get('environment',['domcoord.author'],
125: $ownerdomain,$ownername);
126: unless ($blocked{'domcoord.author'} eq 'blocked') {
127: if (grep(/^$ownerdomain$/,@possibledomains)) {
128: if ($setpriv) {
1.51 ! raeburn 129: my $refresh=$env{'user.refresh.time'};
! 130: if (!$refresh) {
! 131: $refresh = $then;
! 132: }
1.49 raeburn 133: my $now = time;
134: &Apache::lonnet::check_adhoc_privs($ownerdomain,$ownername,
1.51 ! raeburn 135: $then,$refresh,$now,'ca',
! 136: 'constructaccess');
1.49 raeburn 137: }
138: return($ownername,$ownerdomain);
139: }
140: }
141: }
1.15 www 142: return '';
143: }
144:
1.49 raeburn 145: sub is_active_dc {
146: my ($ownerdomain,$then) = @_;
147: my $livedc;
148: if ($env{'user.adv'}) {
149: my $domrole = $env{'user.role.dc./'.$ownerdomain.'/'};
150: if ($domrole) {
151: my ($tstart,$tend)=split(/\./,$domrole);
152: $livedc = 1;
153: if ($tstart && $tstart>$then) { undef($livedc); }
154: if ($tend && $tend <$then) { undef($livedc); }
155: }
156: }
157: return $livedc;
158: }
159:
160:
1.1 albertel 161: sub handler {
162: my $r = shift;
163: my $requrl=$r->uri;
1.38 albertel 164: $env{'request.editurl'}=$requrl;
1.46 albertel 165:
166: my $handle = &Apache::lonnet::check_for_valid_session($r);
167: if ($handle ne '') {
1.28 www 168:
169: # ------------------------------------------------------ Initialize Environment
1.46 albertel 170: my $lonidsdir=$r->dir_config('lonIDsDir');
171: &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);
1.30 www 172:
173: # --------------------------------------------------------- Initialize Language
174:
1.46 albertel 175: &Apache::lonlocal::get_language_handle($r);
1.28 www 176:
177: # -------------------------------------------------------------- Resource State
178:
1.46 albertel 179: $env{'request.state'} = "construct";
180: $env{'request.filename'} = $r->filename;
1.15 www 181:
1.50 raeburn 182: unless (&constructaccess($requrl,$r->dir_config('lonDefDomain'),'setpriv')) {
1.46 albertel 183: $r->log_reason("Unauthorized $requrl", $r->filename);
184: return HTTP_NOT_ACCEPTABLE;
185: }
1.9 www 186:
187: # -------------------------------------------------------- Load POST parameters
188:
1.46 albertel 189: &Apache::lonacc::get_posted_cgi($r);
1.8 www 190:
1.46 albertel 191: return OK;
192: } else {
193: $r->log_reason("Cookie $handle not valid", $r->filename)
1.1 albertel 194: }
1.6 www 195:
196: # ----------------------------------------------- Store where they wanted to go
197:
1.38 albertel 198: $env{'request.firsturl'}=$requrl;
1.1 albertel 199: return FORBIDDEN;
200: }
201:
202: 1;
203: __END__
204:
205:
206:
207:
208:
209:
210:
211:
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