File:
[LON-CAPA] /
loncom /
auth /
lonacc.pm
Revision
1.92:
download - view:
text,
annotated -
select for diffs
Tue Aug 8 17:20:15 2006 UTC (17 years, 9 months ago) by
albertel
Branches:
MAIN
CVS tags:
version_2_2_0,
version_2_1_99_3,
HEAD
- fix issues with public access
- publiccheck takes care of issuing all public cookies
(thus no longer getting two ids consumed)
- pucliccheck will initlaize the env of a puclic user so
lonacc can use the existance of user.name and user.domain being
set as a valid check of a being a valid user (as opposed to the
cookie being set to a valid file)
1: # The LearningOnline Network
2: # Cookie Based Access Handler
3: #
4: # $Id: lonacc.pm,v 1.92 2006/08/08 17:20:15 albertel Exp $
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: #
28: ###
29:
30: package Apache::lonacc;
31:
32: use strict;
33: use Apache::Constants qw(:common :http :methods);
34: use Apache::File;
35: use Apache::lonnet;
36: use Apache::loncommon();
37: use Apache::lonlocal;
38: use Apache::restrictedaccess();
39: use CGI::Cookie();
40: use Fcntl qw(:flock);
41: use LONCAPA;
42:
43: sub cleanup {
44: my ($r)=@_;
45: if (! $r->is_initial_req()) { return DECLINED; }
46: &Apache::lonnet::save_cache();
47: return OK;
48: }
49:
50: sub goodbye {
51: my ($r)=@_;
52: &Apache::lonnet::goodbye();
53: return DONE;
54: }
55:
56: ###############################################
57:
58: sub get_posted_cgi {
59: my ($r) = @_;
60:
61: my $buffer;
62: if ($r->header_in('Content-length')) {
63: $r->read($buffer,$r->header_in('Content-length'),0);
64: }
65: unless ($buffer=~/^(\-+\w+)\s+Content\-Disposition\:\s*form\-data/si) {
66: my @pairs=split(/&/,$buffer);
67: my $pair;
68: foreach $pair (@pairs) {
69: my ($name,$value) = split(/=/,$pair);
70: $value =~ tr/+/ /;
71: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
72: $name =~ tr/+/ /;
73: $name =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
74: &Apache::loncommon::add_to_env("form.$name",$value);
75: }
76: } else {
77: my $contentsep=$1;
78: my @lines = split (/\n/,$buffer);
79: my $name='';
80: my $value='';
81: my $fname='';
82: my $fmime='';
83: my $i;
84: for ($i=0;$i<=$#lines;$i++) {
85: if ($lines[$i]=~/^$contentsep/) {
86: if ($name) {
87: chomp($value);
88: if ($fname) {
89: $env{"form.$name.filename"}=$fname;
90: $env{"form.$name.mimetype"}=$fmime;
91: } else {
92: $value=~s/\s+$//s;
93: }
94: &Apache::loncommon::add_to_env("form.$name",$value);
95: }
96: if ($i<$#lines) {
97: $i++;
98: $lines[$i]=~
99: /Content\-Disposition\:\s*form\-data\;\s*name\=\"([^\"]+)\"/i;
100: $name=$1;
101: $value='';
102: if ($lines[$i]=~/filename\=\"([^\"]+)\"/i) {
103: $fname=$1;
104: if
105: ($lines[$i+1]=~/Content\-Type\:\s*([\w\-\/]+)/i) {
106: $fmime=$1;
107: $i++;
108: } else {
109: $fmime='';
110: }
111: } else {
112: $fname='';
113: $fmime='';
114: }
115: $i++;
116: }
117: } else {
118: $value.=$lines[$i]."\n";
119: }
120: }
121: }
122: #
123: # Digested POSTed values
124: #
125: # Remember the way this was originally done (GET or POST)
126: #
127: $env{'request.method'}=$ENV{'REQUEST_METHOD'};
128: #
129: # There may also be stuff in the query string
130: # Tell subsequent handlers that this was GET, not POST, so they can access query string.
131: # Also, unset POSTed content length to cover all tracks.
132: #
133:
134: $r->method_number(M_GET);
135:
136: $r->method('GET');
137: $r->headers_in->unset('Content-length');
138: }
139:
140: sub handler {
141: my $r = shift;
142: my $requrl=$r->uri;
143: my %cookies=CGI::Cookie->parse($r->header_in('Cookie'));
144: my $lonid=$cookies{'lonID'};
145: my $cookie;
146: my $lonidsdir=$r->dir_config('lonIDsDir');
147:
148: my $handle;
149: if ($lonid) {
150: $handle=$lonid->value;
151: $handle=~s/\W//g;
152: }
153:
154: my ($sso_login);
155: if ($r->user
156: && (!$lonid || !-e "$lonidsdir/$handle.id" || $handle eq '') ) {
157: $sso_login = 1;
158: my $domain = $r->dir_config('lonDefDomain');
159: my $home=&Apache::lonnet::homeserver($r->user,$domain);
160: if ($home !~ /(con_lost|no_such_host)/) {
161: $handle=&Apache::lonauth::success($r,$r->user,$domain,
162: $home,'noredirect');
163: $r->header_out('Set-cookie',"lonID=$handle; path=/");
164: }
165: }
166:
167: if ($sso_login) {
168: &Apache::lonnet::appenv('request.sso.login' => 1);
169: }
170:
171: if ($r->dir_config("lonBalancer") eq 'yes') {
172: $r->set_handlers('PerlResponseHandler'=>
173: [\&Apache::switchserver::handler]);
174: }
175:
176: if ($handle eq '') {
177: $r->log_reason("Cookie $handle not valid", $r->filename);
178: } elsif ((-e "$lonidsdir/$handle.id") && ($handle ne '')) {
179:
180: # ------------------------------------------------------ Initialize Environment
181:
182: &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);
183:
184: # --------------------------------------------------------- Initialize Language
185:
186: &Apache::lonlocal::get_language_handle($r);
187:
188: }
189:
190: # -------------------------------------------------- Should be a valid user now
191: if ($env{'user.name'} ne '' && $env{'user.domain'} ne '') {
192: # -------------------------------------------------------------- Resource State
193:
194: if ($requrl=~/^\/+(res|uploaded)\//) {
195: $env{'request.state'} = "published";
196: } else {
197: $env{'request.state'} = 'unknown';
198: }
199: $env{'request.filename'} = $r->filename;
200: $env{'request.noversionuri'} = &Apache::lonnet::deversion($requrl);
201: # -------------------------------------------------------- Load POST parameters
202:
203: &Apache::lonacc::get_posted_cgi($r);
204:
205: # ---------------------------------------------------------------- Check access
206: my $now = time;
207: if ($requrl!~/^\/adm|public|prtspool\//) {
208: my $access=&Apache::lonnet::allowed('bre',$requrl);
209: if ($access eq '1') {
210: $env{'user.error.msg'}="$requrl:bre:0:0:Choose Course";
211: return HTTP_NOT_ACCEPTABLE;
212: }
213: if ($access eq 'A') {
214: &Apache::restrictedaccess::setup_handler($r);
215: return OK;
216: }
217: if (($access ne '2') && ($access ne 'F')) {
218: $env{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
219: return HTTP_NOT_ACCEPTABLE;
220: }
221: }
222: if ($requrl =~ m|^/prtspool/|) {
223: my $start='/prtspool/'.$env{'user.name'}.'_'.
224: $env{'user.domain'};
225: if ($requrl !~ /^\Q$start\E/) {
226: $env{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
227: return HTTP_NOT_ACCEPTABLE;
228: }
229: }
230: if ($env{'user.name'} eq 'public' &&
231: $env{'user.domain'} eq 'public' &&
232: $requrl !~ m{^/+(res|public|uploaded)/} &&
233: $requrl !~ m{^/adm/[^/]+/[^/]+/aboutme/portfolio$ }x &&
234: $requrl !~ m{^/+adm/(help|logout|restrictedaccess|randomlabel\.png)}) {
235: $env{'request.querystring'}=$r->args;
236: $env{'request.firsturl'}=$requrl;
237: return FORBIDDEN;
238: }
239: # ------------------------------------------------------------- This is allowed
240: if ($env{'request.course.id'}) {
241: &Apache::lonnet::countacc($requrl);
242: $requrl=~/\.(\w+)$/;
243: if ((&Apache::loncommon::fileembstyle($1) eq 'ssi') ||
244: ($requrl=~/^\/adm\/.*\/(aboutme|navmaps|smppg|bulletinboard)(\?|$ )/x) ||
245: ($requrl=~/^\/adm\/wrapper\//) ||
246: ($requrl=~m|^/adm/coursedocs/showdoc/|) ||
247: ($requrl=~m|\.problem/smpedit$|) ||
248: ($requrl=~/^\/public\/.*\/syllabus$/)) {
249: # ------------------------------------- This is serious stuff, get symb and log
250: my $query=$r->args;
251: my $symb;
252: if ($query) {
253: &Apache::loncommon::get_unprocessed_cgi($query,['symb']);
254: }
255: if ($env{'form.symb'}) {
256: $symb=&Apache::lonnet::symbclean($env{'form.symb'});
257: if ($requrl =~ m|^/adm/wrapper/|
258: || $requrl =~ m|^/adm/coursedocs/showdoc/|) {
259: my ($map,$mid,$murl)=&Apache::lonnet::decode_symb($symb);
260: &Apache::lonnet::symblist($map,$murl => [$murl,$mid],
261: 'last_known' =>[$murl,$mid]);
262: } elsif ((&Apache::lonnet::symbverify($symb,$requrl)) ||
263: (($requrl=~m|(.*)/smpedit$|) &&
264: &Apache::lonnet::symbverify($symb,$1))) {
265: my ($map,$mid,$murl)=&Apache::lonnet::decode_symb($symb);
266: &Apache::lonnet::symblist($map,$murl => [$murl,$mid],
267: 'last_known' =>[$murl,$mid]);
268: } else {
269: $r->log_reason('Invalid symb for '.$requrl.': '.
270: $symb);
271: $env{'user.error.msg'}=
272: "$requrl:bre:1:1:Invalid Access";
273: return HTTP_NOT_ACCEPTABLE;
274: }
275: } else {
276: $symb=&Apache::lonnet::symbread($requrl);
277: if (&Apache::lonnet::is_on_map($requrl) && $symb &&
278: !&Apache::lonnet::symbverify($symb,$requrl)) {
279: $r->log_reason('Invalid symb for '.$requrl.': '.$symb);
280: $env{'user.error.msg'}=
281: "$requrl:bre:1:1:Invalid Access";
282: return HTTP_NOT_ACCEPTABLE;
283: }
284: if ($symb) {
285: my ($map,$mid,$murl)=
286: &Apache::lonnet::decode_symb($symb);
287: &Apache::lonnet::symblist($map,$murl =>[$murl,$mid],
288: 'last_known' =>[$murl,$mid]);
289: }
290: }
291: $env{'request.symb'}=$symb;
292: &Apache::lonnet::courseacclog($symb);
293: } else {
294: # ------------------------------------------------------- This is other content
295: &Apache::lonnet::courseacclog($requrl);
296: }
297: }
298: return OK;
299: }
300: # -------------------------------------------- See if this is a public resource
301: if ($requrl=~m|^/+adm/+help/+|) {
302: return OK;
303: }
304: # ------------------------------------ See if this is a viewable portfolio file
305: if (&Apache::lonnet::is_portfolio_url($requrl)) {
306: my $access=&Apache::lonnet::allowed('bre',$requrl);
307: if ($access eq 'A') {
308: &Apache::restrictedaccess::setup_handler($r);
309: return OK;
310: }
311: if (($access ne '2') && ($access ne 'F')) {
312: $env{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
313: return HTTP_NOT_ACCEPTABLE;
314: }
315: }
316:
317: # -------------------------------------------------------------- Not authorized
318: $requrl=~/\.(\w+)$/;
319: # if ((&Apache::loncommon::fileembstyle($1) eq 'ssi') ||
320: # ($requrl=~/^\/adm\/(roles|logout|email|menu|remote)/) ||
321: # ($requrl=~m|^/prtspool/|)) {
322: # -------------------------- Store where they wanted to go and get login screen
323: $env{'request.querystring'}=$r->args;
324: $env{'request.firsturl'}=$requrl;
325: return FORBIDDEN;
326: # } else {
327: # --------------------------------------------------------------------- Goodbye
328: # return HTTP_BAD_REQUEST;
329: # }
330: }
331:
332: 1;
333: __END__
334:
335: =head1 NAME
336:
337: Apache::lonacc - Cookie Based Access Handler
338:
339: =head1 SYNOPSIS
340:
341: Invoked (for various locations) by /etc/httpd/conf/srm.conf:
342:
343: PerlAccessHandler Apache::lonacc
344:
345: =head1 INTRODUCTION
346:
347: This module enables cookie based authentication and is used
348: to control access for many different LON-CAPA URIs.
349:
350: Whenever the client sends the cookie back to the server,
351: this cookie is handled by either lonacc.pm or loncacc.pm
352: (see srm.conf for what is invoked when). If
353: the cookie is missing or invalid, the user is re-challenged
354: for login information.
355:
356: This is part of the LearningOnline Network with CAPA project
357: described at http://www.lon-capa.org.
358:
359: =head1 HANDLER SUBROUTINE
360:
361: This routine is called by Apache and mod_perl.
362:
363: =over 4
364:
365: =item *
366:
367: transfer profile into environment
368:
369: =item *
370:
371: load POST parameters
372:
373: =item *
374:
375: check access
376:
377: =item *
378:
379: if allowed, get symb, log, generate course statistics if applicable
380:
381: =item *
382:
383: otherwise return error
384:
385: =item *
386:
387: see if public resource
388:
389: =item *
390:
391: store attempted access
392:
393: =back
394:
395: =cut
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>
![[BACK]](/icons/back.gif){kind=icon}
Return to lonacc.pm CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [LON-CAPA] / loncom / auth