Annotation of loncom/auth/lonacc.pm, revision 1.92
1.1 albertel 1: # The LearningOnline Network
2: # Cookie Based Access Handler
1.22 www 3: #
1.92 ! albertel 4: # $Id: lonacc.pm,v 1.91 2006/08/04 21:31:53 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: $handle=~s/\W//g;
1.70 albertel 152: }
153:
1.78 albertel 154: my ($sso_login);
1.70 albertel 155: if ($r->user
156: && (!$lonid || !-e "$lonidsdir/$handle.id" || $handle eq '') ) {
1.78 albertel 157: $sso_login = 1;
1.70 albertel 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:
1.78 albertel 167: if ($sso_login) {
168: &Apache::lonnet::appenv('request.sso.login' => 1);
169: }
170:
1.70 albertel 171: if ($r->dir_config("lonBalancer") eq 'yes') {
172: $r->set_handlers('PerlResponseHandler'=>
173: [\&Apache::switchserver::handler]);
174: }
1.92 ! albertel 175:
! 176: if ($handle eq '') {
! 177: $r->log_reason("Cookie $handle not valid", $r->filename);
! 178: } elsif ((-e "$lonidsdir/$handle.id") && ($handle ne '')) {
1.6 www 179:
1.46 www 180: # ------------------------------------------------------ Initialize Environment
181:
1.92 ! albertel 182: &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);
1.47 www 183:
184: # --------------------------------------------------------- Initialize Language
185:
1.92 ! albertel 186: &Apache::lonlocal::get_language_handle($r);
! 187:
! 188: }
1.46 www 189:
1.92 ! albertel 190: # -------------------------------------------------- Should be a valid user now
! 191: if ($env{'user.name'} ne '' && $env{'user.domain'} ne '') {
1.46 www 192: # -------------------------------------------------------------- Resource State
1.6 www 193:
1.92 ! albertel 194: if ($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);
1.6 www 201: # -------------------------------------------------------- Load POST parameters
202:
1.92 ! albertel 203: &Apache::lonacc::get_posted_cgi($r);
1.6 www 204:
205: # ---------------------------------------------------------------- Check access
1.92 ! albertel 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;
1.37 albertel 220: }
1.92 ! albertel 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;
1.67 albertel 228: }
1.92 ! albertel 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: }
1.23 www 239: # ------------------------------------------------------------- This is allowed
1.92 ! albertel 240: if ($env{'request.course.id'}) {
1.24 www 241: &Apache::lonnet::countacc($requrl);
1.92 ! albertel 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: ($requrl=~/^\/public\/.*\/syllabus$/)) {
1.23 www 249: # ------------------------------------- This is serious stuff, get symb and log
1.29 www 250: my $query=$r->args;
1.92 ! albertel 251: my $symb;
! 252: if ($query) {
1.29 www 253: &Apache::loncommon::get_unprocessed_cgi($query,['symb']);
1.92 ! albertel 254: }
! 255: if ($env{'form.symb'}) {
1.64 albertel 256: $symb=&Apache::lonnet::symbclean($env{'form.symb'});
1.92 ! albertel 257: if ($requrl =~ m|^/adm/wrapper/|
1.72 albertel 258: || $requrl =~ m|^/adm/coursedocs/showdoc/|) {
1.92 ! albertel 259: my ($map,$mid,$murl)=&Apache::lonnet::decode_symb($symb);
! 260: &Apache::lonnet::symblist($map,$murl => [$murl,$mid],
1.63 albertel 261: 'last_known' =>[$murl,$mid]);
1.92 ! albertel 262: } elsif ((&Apache::lonnet::symbverify($symb,$requrl)) ||
1.53 albertel 263: (($requrl=~m|(.*)/smpedit$|) &&
264: &Apache::lonnet::symbverify($symb,$1))) {
1.92 ! albertel 265: my ($map,$mid,$murl)=&Apache::lonnet::decode_symb($symb);
! 266: &Apache::lonnet::symblist($map,$murl => [$murl,$mid],
! 267: 'last_known' =>[$murl,$mid]);
1.31 www 268: } else {
269: $r->log_reason('Invalid symb for '.$requrl.': '.
1.92 ! albertel 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);
1.58 albertel 277: if (&Apache::lonnet::is_on_map($requrl) && $symb &&
1.56 albertel 278: !&Apache::lonnet::symbverify($symb,$requrl)) {
1.58 albertel 279: $r->log_reason('Invalid symb for '.$requrl.': '.$symb);
1.92 ! albertel 280: $env{'user.error.msg'}=
! 281: "$requrl:bre:1:1:Invalid Access";
! 282: return HTTP_NOT_ACCEPTABLE;
1.55 albertel 283: }
1.61 albertel 284: if ($symb) {
1.65 albertel 285: my ($map,$mid,$murl)=
286: &Apache::lonnet::decode_symb($symb);
1.63 albertel 287: &Apache::lonnet::symblist($map,$murl =>[$murl,$mid],
1.92 ! albertel 288: 'last_known' =>[$murl,$mid]);
1.61 albertel 289: }
1.92 ! albertel 290: }
! 291: $env{'request.symb'}=$symb;
! 292: &Apache::lonnet::courseacclog($symb);
! 293: } else {
1.23 www 294: # ------------------------------------------------------- This is other content
1.92 ! albertel 295: &Apache::lonnet::courseacclog($requrl);
! 296: }
1.88 albertel 297: }
1.92 ! albertel 298: return OK;
! 299: }
1.21 www 300: # -------------------------------------------- See if this is a public resource
1.68 albertel 301: if ($requrl=~m|^/+adm/+help/+|) {
1.89 albertel 302: return OK;
1.68 albertel 303: }
1.90 albertel 304: # ------------------------------------ See if this is a viewable portfolio file
1.89 albertel 305: if (&Apache::lonnet::is_portfolio_url($requrl)) {
1.90 albertel 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: }
1.79 raeburn 315: }
1.87 albertel 316:
1.34 www 317: # -------------------------------------------------------------- Not authorized
318: $requrl=~/\.(\w+)$/;
1.62 albertel 319: # if ((&Apache::loncommon::fileembstyle($1) eq 'ssi') ||
320: # ($requrl=~/^\/adm\/(roles|logout|email|menu|remote)/) ||
321: # ($requrl=~m|^/prtspool/|)) {
1.34 www 322: # -------------------------- Store where they wanted to go and get login screen
1.64 albertel 323: $env{'request.querystring'}=$r->args;
324: $env{'request.firsturl'}=$requrl;
1.34 www 325: return FORBIDDEN;
1.62 albertel 326: # } else {
1.34 www 327: # --------------------------------------------------------------------- Goodbye
1.62 albertel 328: # return HTTP_BAD_REQUEST;
329: # }
1.1 albertel 330: }
331:
332: 1;
333: __END__
1.25 harris41 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
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