Annotation of loncom/auth/loncacc.pm, revision 1.25
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: #
1.25 ! harris41 5: # $Id: loncacc.pm,v 1.24 2002/12/10 20:37:21 matthew 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;
1.8 www 41: use Apache::Constants qw(:common :http :methods);
1.7 www 42: use Apache::File;
1.1 albertel 43: use CGI::Cookie();
1.14 www 44: use Fcntl qw(:flock);
1.1 albertel 45:
1.15 www 46: sub constructaccess {
47: my ($url,$ownerdomain)=@_;
1.16 www 48: my ($ownername)=($url=~/\/(?:\~|priv\/|home\/)(\w+)/);
1.15 www 49: unless (($ownername) && ($ownerdomain)) { return ''; }
1.24 matthew 50: # We do not allow editing of previous versions of files.
51: if ($url=~/\.(\d+)\.(\w+)$/) { return ''; }
1.15 www 52: if (($ownername eq $ENV{'user.name'}) &&
53: ($ownerdomain eq $ENV{'user.domain'})) {
54: return ($ownername,$ownerdomain);
55: }
56:
57: my $capriv='user.priv.ca./'.
58: $ownerdomain.'/'.$ownername.'./'.
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:
66: return '';
67: }
68:
1.1 albertel 69: sub handler {
70: my $r = shift;
71: my $requrl=$r->uri;
1.22 www 72: $ENV{'request.editurl'}=$requrl;
1.1 albertel 73: my %cookies=CGI::Cookie->parse($r->header_in('Cookie'));
74: my $lonid=$cookies{'lonID'};
75: my $cookie;
76: if ($lonid) {
77: my $handle=$lonid->value;
78: $handle=~s/\W//g;
79: my $lonidsdir=$r->dir_config('lonIDsDir');
80: if ((-e "$lonidsdir/$handle.id") && ($handle ne '')) {
1.2 www 81: my @profile;
82: {
83: my $idf=Apache::File->new("$lonidsdir/$handle.id");
1.14 www 84: flock($idf,LOCK_SH);
1.2 www 85: @profile=<$idf>;
1.14 www 86: $idf->close();
1.2 www 87: }
88: my $envi;
89: for ($envi=0;$envi<=$#profile;$envi++) {
90: chomp($profile[$envi]);
91: my ($envname,$envvalue)=split(/=/,$profile[$envi]);
1.9 www 92: $ENV{$envname} = $envvalue;
1.2 www 93: }
1.9 www 94: $ENV{'user.environment'} = "$lonidsdir/$handle.id";
95: $ENV{'request.state'} = "construct";
96: $ENV{'request.filename'} = $r->filename;
1.15 www 97:
98: unless (&constructaccess($requrl,$r->dir_config('lonDefDomain'))) {
99: $r->log_reason("Unauthorized $requrl", $r->filename);
100: return HTTP_NOT_ACCEPTABLE;
101: }
1.9 www 102:
103: # -------------------------------------------------------- Load POST parameters
104:
105:
1.12 www 106: my $buffer;
1.8 www 107:
1.12 www 108: $r->read($buffer,$r->header_in('Content-length'));
109:
110: unless ($buffer=~/^(\-+\w+)\s+Content\-Disposition\:\s*form\-data/si) {
1.5 www 111: my @pairs=split(/&/,$buffer);
1.9 www 112: my $pair;
1.5 www 113: foreach $pair (@pairs) {
1.9 www 114: my ($name,$value) = split(/=/,$pair);
1.6 www 115: $value =~ tr/+/ /;
116: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
1.10 www 117: $name =~ tr/+/ /;
118: $name =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
1.21 albertel 119: &Apache::loncommon::add_to_env("form.$name",$value);
1.5 www 120: }
1.12 www 121: } else {
122: my $contentsep=$1;
123: my @lines = split (/\n/,$buffer);
124: my $name='';
125: my $value='';
126: my $fname='';
127: my $fmime='';
128: my $i;
129: for ($i=0;$i<=$#lines;$i++) {
130: if ($lines[$i]=~/^$contentsep/) {
131: if ($name) {
132: chomp($value);
133: if ($fname) {
134: $ENV{"form.$name.filename"}=$fname;
135: $ENV{"form.$name.mimetype"}=$fmime;
1.13 www 136: } else {
137: $value=~s/\s+$//s;
1.12 www 138: }
1.21 albertel 139: &Apache::loncommon::add_to_env("form.$name",$value);
1.12 www 140: }
141: if ($i<$#lines) {
142: $i++;
143: $lines[$i]=~
144: /Content\-Disposition\:\s*form\-data\;\s*name\=\"([^\"]+)\"/i;
145: $name=$1;
146: $value='';
147: if ($lines[$i]=~/filename\=\"([^\"]+)\"/i) {
148: $fname=$1;
149: if
150: ($lines[$i+1]=~/Content\-Type\:\s*([\w\-\/]+)/i) {
151: $fmime=$1;
152: $i++;
153: } else {
154: $fmime='';
155: }
156: } else {
157: $fname='';
158: $fmime='';
159: }
160: $i++;
161: }
162: } else {
163: $value.=$lines[$i]."\n";
164: }
165: }
166: }
1.20 www 167: $ENV{'request.method'}=$ENV{'REQUEST_METHOD'};
1.8 www 168: $r->method_number(M_GET);
169: $r->method('GET');
170: $r->headers_in->unset('Content-length');
171:
1.1 albertel 172: return OK;
173: } else {
174: $r->log_reason("Cookie $handle not valid", $r->filename)
175: };
176: }
1.6 www 177:
178: # ----------------------------------------------- Store where they wanted to go
179:
180: $ENV{'request.firsturl'}=$requrl;
1.1 albertel 181: return FORBIDDEN;
182: }
183:
184: 1;
185: __END__
186:
1.20 www 187: =head1 NAME
188:
189: Apache::lonacc - Cookie Based Access Handler for Construction Area
190:
191: =head1 SYNOPSIS
192:
1.23 albertel 193: Invoked (for various locations) by /etc/httpd/conf/loncapa_apache.conf:
1.20 www 194:
195: PerlAccessHandler Apache::loncacc
196:
197: =head1 INTRODUCTION
198:
199: This module enables cookie based authentication for construction area
200: and is used to control access for three (essentially equivalent) URIs.
201:
202: <LocationMatch "^/priv.*">
203: <LocationMatch "^/\~.*">
204: <LocationMatch "^/\~.*/$">
205:
206: Whenever the client sends the cookie back to the server,
207: if the cookie is missing or invalid, the user is re-challenged
208: for login information.
209:
210: This is part of the LearningOnline Network with CAPA project
211: described at http://www.lon-capa.org.
212:
213: =head1 HANDLER SUBROUTINE
214:
215: This routine is called by Apache and mod_perl.
216:
217: =over 4
218:
219: =item *
220:
221: load POST parameters
222:
223: =item *
224:
225: store where they wanted to go (first url entered)
226:
227: =back
228:
229: =head1 OTHERSUBROUTINES
230:
231: =over 4
232:
233: =item *
234:
235: constructaccess($url,$ownerdomain) : See if the owner domain and name
236: in the URL match those in the expected environment. If so, return
237: two element list ($ownername,$ownerdomain). Else, return null string.
238:
239: =back
240:
241: =cut
1.1 albertel 242:
243:
244:
245:
246:
247:
248:
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