Annotation of loncom/auth/lonacc.pm, revision 1.69
1.1 albertel 1: # The LearningOnline Network
2: # Cookie Based Access Handler
1.22 www 3: #
1.69 ! www 4: # $Id: lonacc.pm,v 1.68 2005/07/07 21:38:35 albertel Exp $
1.22 www 5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
1.25 harris41 28: ###
1.1 albertel 29:
30: package Apache::lonacc;
31:
32: use strict;
1.8 www 33: use Apache::Constants qw(:common :http :methods);
1.2 www 34: use Apache::File;
1.6 www 35: use Apache::lonnet;
1.25 harris41 36: use Apache::loncommon();
1.47 www 37: use Apache::lonlocal;
1.1 albertel 38: use CGI::Cookie();
1.16 www 39: use Fcntl qw(:flock);
1.1 albertel 40:
41: sub handler {
42: my $r = shift;
43: my $requrl=$r->uri;
44: my %cookies=CGI::Cookie->parse($r->header_in('Cookie'));
45: my $lonid=$cookies{'lonID'};
46: my $cookie;
47: if ($lonid) {
48: my $handle=$lonid->value;
49: $handle=~s/\W//g;
50: my $lonidsdir=$r->dir_config('lonIDsDir');
51: if ((-e "$lonidsdir/$handle.id") && ($handle ne '')) {
1.6 www 52:
1.46 www 53: # ------------------------------------------------------ Initialize Environment
54:
55: &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);
1.47 www 56:
57: # --------------------------------------------------------- Initialize Language
58:
1.48 www 59: &Apache::lonlocal::get_language_handle($r);
1.46 www 60:
61: # -------------------------------------------------------------- Resource State
1.6 www 62:
1.51 albertel 63: if ($requrl=~/^\/+(res|uploaded)\//) {
1.64 albertel 64: $env{'request.state'} = "published";
1.17 www 65: } else {
1.64 albertel 66: $env{'request.state'} = 'unknown';
1.17 www 67: }
1.64 albertel 68: $env{'request.filename'} = $r->filename;
69: $env{'request.noversionuri'} = &Apache::lonnet::deversion($requrl);
1.6 www 70: # -------------------------------------------------------- Load POST parameters
71:
1.46 www 72: &Apache::loncommon::get_posted_cgi($r);
1.6 www 73:
74: # ---------------------------------------------------------------- Check access
75:
1.37 albertel 76: if ($requrl!~/^\/adm|public|prtspool\//) {
1.7 www 77: my $access=&Apache::lonnet::allowed('bre',$requrl);
78: if ($access eq '1') {
1.64 albertel 79: $env{'user.error.msg'}="$requrl:bre:0:0:Choose Course";
1.7 www 80: return HTTP_NOT_ACCEPTABLE;
81: }
82: if (($access ne '2') && ($access ne 'F')) {
1.64 albertel 83: $env{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
1.7 www 84: return HTTP_NOT_ACCEPTABLE;
85: }
1.23 www 86: }
1.37 albertel 87: if ($requrl =~ m|^/prtspool/|) {
1.64 albertel 88: my $start='/prtspool/'.$env{'user.name'}.'_'.
89: $env{'user.domain'};
1.37 albertel 90: if ($requrl !~ /^\Q$start\E/) {
1.64 albertel 91: $env{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
1.37 albertel 92: return HTTP_NOT_ACCEPTABLE;
93: }
94: }
1.67 albertel 95: if ($env{'user.name'} eq 'public' &&
96: $env{'user.domain'} eq 'public' &&
97: $requrl !~ m{^/+(res|public)/} &&
1.69 ! www 98: $requrl !~ m{^/+adm/(help|logout|randomlabel\.png)}) {
1.67 albertel 99: $env{'request.querystring'}=$r->args;
100: $env{'request.firsturl'}=$requrl;
101: return FORBIDDEN;
102: }
1.23 www 103: # ------------------------------------------------------------- This is allowed
1.64 albertel 104: if ($env{'request.course.id'}) {
1.24 www 105: &Apache::lonnet::countacc($requrl);
1.23 www 106: $requrl=~/\.(\w+)$/;
1.39 www 107: if ((&Apache::loncommon::fileembstyle($1) eq 'ssi') ||
1.44 www 108: ($requrl=~/^\/adm\/.*\/(aboutme|navmaps|smppg|bulletinboard)(\?|$)/) ||
109: ($requrl=~/^\/adm\/wrapper\//) ||
1.53 albertel 110: ($requrl=~m|\.problem/smpedit$|) ||
1.39 www 111: ($requrl=~/^\/public\/.*\/syllabus$/)) {
1.23 www 112: # ------------------------------------- This is serious stuff, get symb and log
1.29 www 113: my $query=$r->args;
114: my $symb;
115: if ($query) {
116: &Apache::loncommon::get_unprocessed_cgi($query,['symb']);
117: }
1.64 albertel 118: if ($env{'form.symb'}) {
119: $symb=&Apache::lonnet::symbclean($env{'form.symb'});
1.52 raeburn 120: if ($requrl =~ m|^/adm/wrapper/|) {
121: my ($map,$mid,$murl)=&Apache::lonnet::decode_symb($symb);
1.63 albertel 122: &Apache::lonnet::symblist($map,$murl => [$murl,$mid],
123: 'last_known' =>[$murl,$mid]);
1.53 albertel 124: } elsif ((&Apache::lonnet::symbverify($symb,$requrl)) ||
125: (($requrl=~m|(.*)/smpedit$|) &&
126: &Apache::lonnet::symbverify($symb,$1))) {
1.50 albertel 127: my ($map,$mid,$murl)=&Apache::lonnet::decode_symb($symb);
1.63 albertel 128: &Apache::lonnet::symblist($map,$murl => [$murl,$mid],
129: 'last_known' =>[$murl,$mid]);
1.31 www 130: } else {
131: $r->log_reason('Invalid symb for '.$requrl.': '.
132: $symb);
1.64 albertel 133: $env{'user.error.msg'}=
1.31 www 134: "$requrl:bre:1:1:Invalid Access";
135: return HTTP_NOT_ACCEPTABLE;
136: }
1.29 www 137: } else {
1.44 www 138: $symb=&Apache::lonnet::symbread($requrl);
1.58 albertel 139: if (&Apache::lonnet::is_on_map($requrl) && $symb &&
1.56 albertel 140: !&Apache::lonnet::symbverify($symb,$requrl)) {
1.58 albertel 141: $r->log_reason('Invalid symb for '.$requrl.': '.$symb);
1.64 albertel 142: $env{'user.error.msg'}=
1.55 albertel 143: "$requrl:bre:1:1:Invalid Access";
144: return HTTP_NOT_ACCEPTABLE;
145: }
1.61 albertel 146: if ($symb) {
1.65 albertel 147: my ($map,$mid,$murl)=
148: &Apache::lonnet::decode_symb($symb);
1.63 albertel 149: &Apache::lonnet::symblist($map,$murl =>[$murl,$mid],
150: 'last_known' =>[$murl,$mid]);
1.61 albertel 151: }
1.29 www 152: }
1.64 albertel 153: $env{'request.symb'}=$symb;
1.23 www 154: &Apache::lonnet::courseacclog($symb);
155: } else {
156: # ------------------------------------------------------- This is other content
157: &Apache::lonnet::courseacclog($requrl);
158: }
159: }
1.2 www 160: return OK;
1.1 albertel 161: } else {
1.5 www 162: $r->log_reason("Cookie $handle not valid", $r->filename)
1.1 albertel 163: };
164: }
1.6 www 165:
1.21 www 166: # -------------------------------------------- See if this is a public resource
1.37 albertel 167: if ($requrl=~m|^/public/|
168: || (&Apache::lonnet::metadata($requrl,'copyright') eq 'public')) {
1.21 www 169: &Apache::lonnet::logthis('Granting public access: '.$requrl);
1.66 albertel 170: my $cookie=
171: &Apache::lonauth::success($r,'public','public','public');
172: my $lonidsdir=$r->dir_config('lonIDsDir');
173: &Apache::lonnet::transfer_profile_to_env($lonidsdir,$cookie);
1.60 albertel 174: &Apache::loncommon::get_posted_cgi($r);
1.64 albertel 175: $env{'request.state'} = "published";
176: $env{'request.publicaccess'} = 1;
177: $env{'request.filename'} = $r->filename;
1.59 albertel 178:
1.66 albertel 179: $r->header_out('Set-cookie',"lonID=$cookie; path=/");
1.21 www 180: return OK;
181: }
1.68 albertel 182: if ($requrl=~m|^/+adm/+help/+|) {
183: return OK;
184: }
1.34 www 185: # -------------------------------------------------------------- Not authorized
186: $requrl=~/\.(\w+)$/;
1.62 albertel 187: # if ((&Apache::loncommon::fileembstyle($1) eq 'ssi') ||
188: # ($requrl=~/^\/adm\/(roles|logout|email|menu|remote)/) ||
189: # ($requrl=~m|^/prtspool/|)) {
1.34 www 190: # -------------------------- Store where they wanted to go and get login screen
1.64 albertel 191: $env{'request.querystring'}=$r->args;
192: $env{'request.firsturl'}=$requrl;
1.34 www 193: return FORBIDDEN;
1.62 albertel 194: # } else {
1.34 www 195: # --------------------------------------------------------------------- Goodbye
1.62 albertel 196: # return HTTP_BAD_REQUEST;
197: # }
1.1 albertel 198: }
199:
200: 1;
201: __END__
1.25 harris41 202:
203: =head1 NAME
204:
205: Apache::lonacc - Cookie Based Access Handler
206:
207: =head1 SYNOPSIS
208:
209: Invoked (for various locations) by /etc/httpd/conf/srm.conf:
210:
211: PerlAccessHandler Apache::lonacc
212:
213: =head1 INTRODUCTION
214:
215: This module enables cookie based authentication and is used
216: to control access for many different LON-CAPA URIs.
217:
218: Whenever the client sends the cookie back to the server,
219: this cookie is handled by either lonacc.pm or loncacc.pm
220: (see srm.conf for what is invoked when). If
221: the cookie is missing or invalid, the user is re-challenged
222: for login information.
223:
224: This is part of the LearningOnline Network with CAPA project
225: described at http://www.lon-capa.org.
226:
227: =head1 HANDLER SUBROUTINE
228:
229: This routine is called by Apache and mod_perl.
230:
231: =over 4
232:
233: =item *
234:
235: transfer profile into environment
236:
237: =item *
238:
239: load POST parameters
240:
241: =item *
242:
243: check access
244:
245: =item *
246:
247: if allowed, get symb, log, generate course statistics if applicable
248:
249: =item *
250:
251: otherwise return error
252:
253: =item *
254:
255: see if public resource
256:
257: =item *
258:
259: store attempted access
260:
261: =back
262:
263: =cut
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