Annotation of loncom/auth/lonacc.pm, revision 1.93
1.1 albertel 1: # The LearningOnline Network
2: # Cookie Based Access Handler
1.22 www 3: #
1.93 ! albertel 4: # $Id: lonacc.pm,v 1.92 2006/08/08 17:20:15 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;
1.86 albertel 38: use Apache::restrictedaccess();
1.1 albertel 39: use CGI::Cookie();
1.16 www 40: use Fcntl qw(:flock);
1.85 raeburn 41: use LONCAPA;
1.1 albertel 42:
1.75 albertel 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:
1.76 albertel 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($1))/eg;
1.77 albertel 74: &Apache::loncommon::add_to_env("form.$name",$value);
1.76 albertel 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: }
1.77 albertel 94: &Apache::loncommon::add_to_env("form.$name",$value);
1.76 albertel 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:
1.1 albertel 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;
1.70 albertel 146: my $lonidsdir=$r->dir_config('lonIDsDir');
147:
148: my $handle;
1.1 albertel 149: if ($lonid) {
1.70 albertel 150: $handle=$lonid->value;
1.1 albertel 151: $handle=~s/\W//g;
1.70 albertel 152: }
1.93 ! albertel 153:
1.78 albertel 154: my ($sso_login);
1.70 albertel 155: if ($r->user
1.93 ! albertel 156: #&& $r->user ne 'lonadm'
1.70 albertel 157: && (!$lonid || !-e "$lonidsdir/$handle.id" || $handle eq '') ) {
1.93 ! albertel 158: &Apache::lonnet::logthis("$handle and -e ".(-e "$lonidsdir/$handle.id"));
! 159:
1.70 albertel 160: my $domain = $r->dir_config('lonDefDomain');
161: my $home=&Apache::lonnet::homeserver($r->user,$domain);
1.93 ! albertel 162: if ($home !~ /(con_lost|no_host|no_such_host)/) {
! 163: my %info=('ip' => $r->connection->remote_ip(),
! 164: 'domain' => $domain,
! 165: 'username' => $r->user,
! 166: 'server' => $r->dir_config('lonHostID'),
! 167: 'sso.login' => 1
! 168: );
! 169: my $token = &Apache::lonnet::tmpput(\%info,
! 170: $r->dir_config('lonHostID'));
! 171: $env{'form.token'} = $token;
! 172: $r->internal_redirect('/adm/migrateuser');
! 173: return OK;
! 174: } elsif (defined($r->dir_config('lonSSOUserUnkownRedirect'))) {
! 175: $r->internal_redirect($r->dir_config('lonSSOUserUnkownRedirect'));
! 176: return OK;
1.70 albertel 177: }
178: }
179:
180: if ($r->dir_config("lonBalancer") eq 'yes') {
181: $r->set_handlers('PerlResponseHandler'=>
182: [\&Apache::switchserver::handler]);
183: }
1.92 albertel 184:
185: if ($handle eq '') {
186: $r->log_reason("Cookie $handle not valid", $r->filename);
187: } elsif ((-e "$lonidsdir/$handle.id") && ($handle ne '')) {
1.6 www 188:
1.46 www 189: # ------------------------------------------------------ Initialize Environment
190:
1.92 albertel 191: &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);
1.47 www 192:
193: # --------------------------------------------------------- Initialize Language
194:
1.92 albertel 195: &Apache::lonlocal::get_language_handle($r);
196:
197: }
1.46 www 198:
1.92 albertel 199: # -------------------------------------------------- Should be a valid user now
200: if ($env{'user.name'} ne '' && $env{'user.domain'} ne '') {
1.46 www 201: # -------------------------------------------------------------- Resource State
1.6 www 202:
1.92 albertel 203: if ($requrl=~/^\/+(res|uploaded)\//) {
204: $env{'request.state'} = "published";
205: } else {
206: $env{'request.state'} = 'unknown';
207: }
208: $env{'request.filename'} = $r->filename;
209: $env{'request.noversionuri'} = &Apache::lonnet::deversion($requrl);
1.6 www 210: # -------------------------------------------------------- Load POST parameters
211:
1.92 albertel 212: &Apache::lonacc::get_posted_cgi($r);
1.6 www 213:
214: # ---------------------------------------------------------------- Check access
1.92 albertel 215: my $now = time;
216: if ($requrl!~/^\/adm|public|prtspool\//) {
217: my $access=&Apache::lonnet::allowed('bre',$requrl);
218: if ($access eq '1') {
219: $env{'user.error.msg'}="$requrl:bre:0:0:Choose Course";
220: return HTTP_NOT_ACCEPTABLE;
221: }
222: if ($access eq 'A') {
223: &Apache::restrictedaccess::setup_handler($r);
224: return OK;
225: }
226: if (($access ne '2') && ($access ne 'F')) {
227: $env{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
228: return HTTP_NOT_ACCEPTABLE;
1.37 albertel 229: }
1.92 albertel 230: }
231: if ($requrl =~ m|^/prtspool/|) {
232: my $start='/prtspool/'.$env{'user.name'}.'_'.
233: $env{'user.domain'};
234: if ($requrl !~ /^\Q$start\E/) {
235: $env{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
236: return HTTP_NOT_ACCEPTABLE;
1.67 albertel 237: }
1.92 albertel 238: }
239: if ($env{'user.name'} eq 'public' &&
240: $env{'user.domain'} eq 'public' &&
241: $requrl !~ m{^/+(res|public|uploaded)/} &&
242: $requrl !~ m{^/adm/[^/]+/[^/]+/aboutme/portfolio$ }x &&
243: $requrl !~ m{^/+adm/(help|logout|restrictedaccess|randomlabel\.png)}) {
244: $env{'request.querystring'}=$r->args;
245: $env{'request.firsturl'}=$requrl;
246: return FORBIDDEN;
247: }
1.23 www 248: # ------------------------------------------------------------- This is allowed
1.92 albertel 249: if ($env{'request.course.id'}) {
1.24 www 250: &Apache::lonnet::countacc($requrl);
1.92 albertel 251: $requrl=~/\.(\w+)$/;
252: if ((&Apache::loncommon::fileembstyle($1) eq 'ssi') ||
253: ($requrl=~/^\/adm\/.*\/(aboutme|navmaps|smppg|bulletinboard)(\?|$ )/x) ||
254: ($requrl=~/^\/adm\/wrapper\//) ||
255: ($requrl=~m|^/adm/coursedocs/showdoc/|) ||
256: ($requrl=~m|\.problem/smpedit$|) ||
257: ($requrl=~/^\/public\/.*\/syllabus$/)) {
1.23 www 258: # ------------------------------------- This is serious stuff, get symb and log
1.29 www 259: my $query=$r->args;
1.92 albertel 260: my $symb;
261: if ($query) {
1.29 www 262: &Apache::loncommon::get_unprocessed_cgi($query,['symb']);
1.92 albertel 263: }
264: if ($env{'form.symb'}) {
1.64 albertel 265: $symb=&Apache::lonnet::symbclean($env{'form.symb'});
1.92 albertel 266: if ($requrl =~ m|^/adm/wrapper/|
1.72 albertel 267: || $requrl =~ m|^/adm/coursedocs/showdoc/|) {
1.92 albertel 268: my ($map,$mid,$murl)=&Apache::lonnet::decode_symb($symb);
269: &Apache::lonnet::symblist($map,$murl => [$murl,$mid],
1.63 albertel 270: 'last_known' =>[$murl,$mid]);
1.92 albertel 271: } elsif ((&Apache::lonnet::symbverify($symb,$requrl)) ||
1.53 albertel 272: (($requrl=~m|(.*)/smpedit$|) &&
273: &Apache::lonnet::symbverify($symb,$1))) {
1.92 albertel 274: my ($map,$mid,$murl)=&Apache::lonnet::decode_symb($symb);
275: &Apache::lonnet::symblist($map,$murl => [$murl,$mid],
276: 'last_known' =>[$murl,$mid]);
1.31 www 277: } else {
278: $r->log_reason('Invalid symb for '.$requrl.': '.
1.92 albertel 279: $symb);
280: $env{'user.error.msg'}=
281: "$requrl:bre:1:1:Invalid Access";
282: return HTTP_NOT_ACCEPTABLE;
283: }
284: } else {
285: $symb=&Apache::lonnet::symbread($requrl);
1.58 albertel 286: if (&Apache::lonnet::is_on_map($requrl) && $symb &&
1.56 albertel 287: !&Apache::lonnet::symbverify($symb,$requrl)) {
1.58 albertel 288: $r->log_reason('Invalid symb for '.$requrl.': '.$symb);
1.92 albertel 289: $env{'user.error.msg'}=
290: "$requrl:bre:1:1:Invalid Access";
291: return HTTP_NOT_ACCEPTABLE;
1.55 albertel 292: }
1.61 albertel 293: if ($symb) {
1.65 albertel 294: my ($map,$mid,$murl)=
295: &Apache::lonnet::decode_symb($symb);
1.63 albertel 296: &Apache::lonnet::symblist($map,$murl =>[$murl,$mid],
1.92 albertel 297: 'last_known' =>[$murl,$mid]);
1.61 albertel 298: }
1.92 albertel 299: }
300: $env{'request.symb'}=$symb;
301: &Apache::lonnet::courseacclog($symb);
302: } else {
1.23 www 303: # ------------------------------------------------------- This is other content
1.92 albertel 304: &Apache::lonnet::courseacclog($requrl);
305: }
1.88 albertel 306: }
1.92 albertel 307: return OK;
308: }
1.21 www 309: # -------------------------------------------- See if this is a public resource
1.68 albertel 310: if ($requrl=~m|^/+adm/+help/+|) {
1.89 albertel 311: return OK;
1.68 albertel 312: }
1.90 albertel 313: # ------------------------------------ See if this is a viewable portfolio file
1.89 albertel 314: if (&Apache::lonnet::is_portfolio_url($requrl)) {
1.90 albertel 315: my $access=&Apache::lonnet::allowed('bre',$requrl);
316: if ($access eq 'A') {
317: &Apache::restrictedaccess::setup_handler($r);
318: return OK;
319: }
320: if (($access ne '2') && ($access ne 'F')) {
321: $env{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
322: return HTTP_NOT_ACCEPTABLE;
323: }
1.79 raeburn 324: }
1.87 albertel 325:
1.34 www 326: # -------------------------------------------------------------- Not authorized
327: $requrl=~/\.(\w+)$/;
1.62 albertel 328: # if ((&Apache::loncommon::fileembstyle($1) eq 'ssi') ||
329: # ($requrl=~/^\/adm\/(roles|logout|email|menu|remote)/) ||
330: # ($requrl=~m|^/prtspool/|)) {
1.34 www 331: # -------------------------- Store where they wanted to go and get login screen
1.64 albertel 332: $env{'request.querystring'}=$r->args;
333: $env{'request.firsturl'}=$requrl;
1.34 www 334: return FORBIDDEN;
1.62 albertel 335: # } else {
1.34 www 336: # --------------------------------------------------------------------- Goodbye
1.62 albertel 337: # return HTTP_BAD_REQUEST;
338: # }
1.1 albertel 339: }
340:
341: 1;
342: __END__
1.25 harris41 343:
344: =head1 NAME
345:
346: Apache::lonacc - Cookie Based Access Handler
347:
348: =head1 SYNOPSIS
349:
350: Invoked (for various locations) by /etc/httpd/conf/srm.conf:
351:
352: PerlAccessHandler Apache::lonacc
353:
354: =head1 INTRODUCTION
355:
356: This module enables cookie based authentication and is used
357: to control access for many different LON-CAPA URIs.
358:
359: Whenever the client sends the cookie back to the server,
360: this cookie is handled by either lonacc.pm or loncacc.pm
361: (see srm.conf for what is invoked when). If
362: the cookie is missing or invalid, the user is re-challenged
363: for login information.
364:
365: This is part of the LearningOnline Network with CAPA project
366: described at http://www.lon-capa.org.
367:
368: =head1 HANDLER SUBROUTINE
369:
370: This routine is called by Apache and mod_perl.
371:
372: =over 4
373:
374: =item *
375:
376: transfer profile into environment
377:
378: =item *
379:
380: load POST parameters
381:
382: =item *
383:
384: check access
385:
386: =item *
387:
388: if allowed, get symb, log, generate course statistics if applicable
389:
390: =item *
391:
392: otherwise return error
393:
394: =item *
395:
396: see if public resource
397:
398: =item *
399:
400: store attempted access
401:
402: =back
403:
404: =cut
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