Annotation of loncom/auth/lonacc.pm, revision 1.90
1.1 albertel 1: # The LearningOnline Network
2: # Cookie Based Access Handler
1.22 www 3: #
1.90 ! albertel 4: # $Id: lonacc.pm,v 1.89 2006/07/21 18:52:32 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: $r->set_handlers('PerlResponseHandler'=>
173: [\&Apache::switchserver::handler]);
174: }
175:
176: if ($handle ne '') {
1.1 albertel 177: if ((-e "$lonidsdir/$handle.id") && ($handle ne '')) {
1.6 www 178:
1.46 www 179: # ------------------------------------------------------ Initialize Environment
180:
181: &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);
1.47 www 182:
183: # --------------------------------------------------------- Initialize Language
184:
1.48 www 185: &Apache::lonlocal::get_language_handle($r);
1.46 www 186:
187: # -------------------------------------------------------------- Resource State
1.6 www 188:
1.51 albertel 189: if ($requrl=~/^\/+(res|uploaded)\//) {
1.64 albertel 190: $env{'request.state'} = "published";
1.17 www 191: } else {
1.64 albertel 192: $env{'request.state'} = 'unknown';
1.17 www 193: }
1.64 albertel 194: $env{'request.filename'} = $r->filename;
195: $env{'request.noversionuri'} = &Apache::lonnet::deversion($requrl);
1.6 www 196: # -------------------------------------------------------- Load POST parameters
197:
1.76 albertel 198: &Apache::lonacc::get_posted_cgi($r);
1.6 www 199:
200: # ---------------------------------------------------------------- Check access
1.79 raeburn 201: my $now = time;
1.37 albertel 202: if ($requrl!~/^\/adm|public|prtspool\//) {
1.7 www 203: my $access=&Apache::lonnet::allowed('bre',$requrl);
204: if ($access eq '1') {
1.64 albertel 205: $env{'user.error.msg'}="$requrl:bre:0:0:Choose Course";
1.7 www 206: return HTTP_NOT_ACCEPTABLE;
207: }
1.90 ! albertel 208: if ($access eq 'A') {
! 209: &Apache::restrictedaccess::setup_handler($r);
! 210: return OK;
! 211: }
1.7 www 212: if (($access ne '2') && ($access ne 'F')) {
1.64 albertel 213: $env{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
1.7 www 214: return HTTP_NOT_ACCEPTABLE;
215: }
1.23 www 216: }
1.37 albertel 217: if ($requrl =~ m|^/prtspool/|) {
1.64 albertel 218: my $start='/prtspool/'.$env{'user.name'}.'_'.
219: $env{'user.domain'};
1.37 albertel 220: if ($requrl !~ /^\Q$start\E/) {
1.64 albertel 221: $env{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
1.37 albertel 222: return HTTP_NOT_ACCEPTABLE;
223: }
224: }
1.67 albertel 225: if ($env{'user.name'} eq 'public' &&
226: $env{'user.domain'} eq 'public' &&
1.90 ! albertel 227: $requrl !~ m{^/+(res|public|uploaded)/} &&
1.89 albertel 228: $requrl !~ m{^/+adm/(help|logout|restrictedaccess|randomlabel\.png)}) {
1.67 albertel 229: $env{'request.querystring'}=$r->args;
230: $env{'request.firsturl'}=$requrl;
231: return FORBIDDEN;
232: }
1.23 www 233: # ------------------------------------------------------------- This is allowed
1.64 albertel 234: if ($env{'request.course.id'}) {
1.24 www 235: &Apache::lonnet::countacc($requrl);
1.23 www 236: $requrl=~/\.(\w+)$/;
1.39 www 237: if ((&Apache::loncommon::fileembstyle($1) eq 'ssi') ||
1.84 raeburn 238: ($requrl=~/^\/adm\/.*\/(aboutme|navmaps|smppg|bulletinboard)(\?|$)/) ||
1.44 www 239: ($requrl=~/^\/adm\/wrapper\//) ||
1.72 albertel 240: ($requrl=~m|^/adm/coursedocs/showdoc/|) ||
1.53 albertel 241: ($requrl=~m|\.problem/smpedit$|) ||
1.39 www 242: ($requrl=~/^\/public\/.*\/syllabus$/)) {
1.23 www 243: # ------------------------------------- This is serious stuff, get symb and log
1.29 www 244: my $query=$r->args;
245: my $symb;
246: if ($query) {
247: &Apache::loncommon::get_unprocessed_cgi($query,['symb']);
248: }
1.64 albertel 249: if ($env{'form.symb'}) {
250: $symb=&Apache::lonnet::symbclean($env{'form.symb'});
1.72 albertel 251: if ($requrl =~ m|^/adm/wrapper/|
252: || $requrl =~ m|^/adm/coursedocs/showdoc/|) {
1.52 raeburn 253: my ($map,$mid,$murl)=&Apache::lonnet::decode_symb($symb);
1.63 albertel 254: &Apache::lonnet::symblist($map,$murl => [$murl,$mid],
255: 'last_known' =>[$murl,$mid]);
1.53 albertel 256: } elsif ((&Apache::lonnet::symbverify($symb,$requrl)) ||
257: (($requrl=~m|(.*)/smpedit$|) &&
258: &Apache::lonnet::symbverify($symb,$1))) {
1.50 albertel 259: my ($map,$mid,$murl)=&Apache::lonnet::decode_symb($symb);
1.74 albertel 260: &Apache::lonnet::symblist($map,$murl => [$murl,$mid],
1.63 albertel 261: 'last_known' =>[$murl,$mid]);
1.31 www 262: } else {
263: $r->log_reason('Invalid symb for '.$requrl.': '.
264: $symb);
1.64 albertel 265: $env{'user.error.msg'}=
1.31 www 266: "$requrl:bre:1:1:Invalid Access";
267: return HTTP_NOT_ACCEPTABLE;
268: }
1.29 www 269: } else {
1.44 www 270: $symb=&Apache::lonnet::symbread($requrl);
1.58 albertel 271: if (&Apache::lonnet::is_on_map($requrl) && $symb &&
1.56 albertel 272: !&Apache::lonnet::symbverify($symb,$requrl)) {
1.58 albertel 273: $r->log_reason('Invalid symb for '.$requrl.': '.$symb);
1.64 albertel 274: $env{'user.error.msg'}=
1.55 albertel 275: "$requrl:bre:1:1:Invalid Access";
276: return HTTP_NOT_ACCEPTABLE;
277: }
1.61 albertel 278: if ($symb) {
1.65 albertel 279: my ($map,$mid,$murl)=
280: &Apache::lonnet::decode_symb($symb);
1.63 albertel 281: &Apache::lonnet::symblist($map,$murl =>[$murl,$mid],
282: 'last_known' =>[$murl,$mid]);
1.61 albertel 283: }
1.29 www 284: }
1.64 albertel 285: $env{'request.symb'}=$symb;
1.23 www 286: &Apache::lonnet::courseacclog($symb);
287: } else {
288: # ------------------------------------------------------- This is other content
289: &Apache::lonnet::courseacclog($requrl);
290: }
291: }
1.2 www 292: return OK;
1.1 albertel 293: } else {
1.73 raeburn 294: $r->log_reason("Cookie $handle not valid", $r->filename);
295: }
1.88 albertel 296: }
1.6 www 297:
1.21 www 298: # -------------------------------------------- See if this is a public resource
1.37 albertel 299: if ($requrl=~m|^/public/|
300: || (&Apache::lonnet::metadata($requrl,'copyright') eq 'public')) {
1.21 www 301: &Apache::lonnet::logthis('Granting public access: '.$requrl);
1.71 www 302: &Apache::lonlocal::get_language_handle($r);
1.66 albertel 303: my $cookie=
304: &Apache::lonauth::success($r,'public','public','public');
305: my $lonidsdir=$r->dir_config('lonIDsDir');
306: &Apache::lonnet::transfer_profile_to_env($lonidsdir,$cookie);
1.76 albertel 307: &Apache::lonacc::get_posted_cgi($r);
1.64 albertel 308: $env{'request.state'} = "published";
309: $env{'request.publicaccess'} = 1;
310: $env{'request.filename'} = $r->filename;
1.59 albertel 311:
1.66 albertel 312: $r->header_out('Set-cookie',"lonID=$cookie; path=/");
1.21 www 313: return OK;
314: }
1.68 albertel 315: if ($requrl=~m|^/+adm/+help/+|) {
1.89 albertel 316: return OK;
1.68 albertel 317: }
1.90 ! albertel 318: # ------------------------------------ See if this is a viewable portfolio file
1.89 albertel 319: if (&Apache::lonnet::is_portfolio_url($requrl)) {
1.90 ! albertel 320: my $access=&Apache::lonnet::allowed('bre',$requrl);
! 321: if ($access eq 'A') {
! 322: &Apache::restrictedaccess::setup_handler($r);
! 323: return OK;
! 324: }
! 325: if (($access ne '2') && ($access ne 'F')) {
! 326: $env{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
! 327: return HTTP_NOT_ACCEPTABLE;
! 328: }
1.79 raeburn 329: }
1.87 albertel 330:
1.34 www 331: # -------------------------------------------------------------- Not authorized
332: $requrl=~/\.(\w+)$/;
1.62 albertel 333: # if ((&Apache::loncommon::fileembstyle($1) eq 'ssi') ||
334: # ($requrl=~/^\/adm\/(roles|logout|email|menu|remote)/) ||
335: # ($requrl=~m|^/prtspool/|)) {
1.34 www 336: # -------------------------- Store where they wanted to go and get login screen
1.64 albertel 337: $env{'request.querystring'}=$r->args;
338: $env{'request.firsturl'}=$requrl;
1.34 www 339: return FORBIDDEN;
1.62 albertel 340: # } else {
1.34 www 341: # --------------------------------------------------------------------- Goodbye
1.62 albertel 342: # return HTTP_BAD_REQUEST;
343: # }
1.1 albertel 344: }
345:
346: 1;
347: __END__
1.25 harris41 348:
349: =head1 NAME
350:
351: Apache::lonacc - Cookie Based Access Handler
352:
353: =head1 SYNOPSIS
354:
355: Invoked (for various locations) by /etc/httpd/conf/srm.conf:
356:
357: PerlAccessHandler Apache::lonacc
358:
359: =head1 INTRODUCTION
360:
361: This module enables cookie based authentication and is used
362: to control access for many different LON-CAPA URIs.
363:
364: Whenever the client sends the cookie back to the server,
365: this cookie is handled by either lonacc.pm or loncacc.pm
366: (see srm.conf for what is invoked when). If
367: the cookie is missing or invalid, the user is re-challenged
368: for login information.
369:
370: This is part of the LearningOnline Network with CAPA project
371: described at http://www.lon-capa.org.
372:
373: =head1 HANDLER SUBROUTINE
374:
375: This routine is called by Apache and mod_perl.
376:
377: =over 4
378:
379: =item *
380:
381: transfer profile into environment
382:
383: =item *
384:
385: load POST parameters
386:
387: =item *
388:
389: check access
390:
391: =item *
392:
393: if allowed, get symb, log, generate course statistics if applicable
394:
395: =item *
396:
397: otherwise return error
398:
399: =item *
400:
401: see if public resource
402:
403: =item *
404:
405: store attempted access
406:
407: =back
408:
409: =cut
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