Annotation of loncom/auth/lonacc.pm, revision 1.118
1.1 albertel 1: # The LearningOnline Network
2: # Cookie Based Access Handler
1.22 www 3: #
1.118 ! raeburn 4: # $Id: lonacc.pm,v 1.117 2008/11/10 13:20:24 jms 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();
1.103 raeburn 39: use Apache::blockedaccess();
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 (! $r->is_initial_req()) { return DECLINED; }
46: &Apache::lonnet::save_cache();
1.96 albertel 47: &Apache::lontexconvert::jsMath_reset();
1.75 albertel 48: return OK;
49: }
50:
51: sub goodbye {
52: my ($r)=@_;
53: &Apache::lonnet::goodbye();
54: return DONE;
55: }
56:
1.76 albertel 57: ###############################################
58:
59: sub get_posted_cgi {
1.114 raeburn 60: my ($r,$fields) = @_;
1.76 albertel 61:
62: my $buffer;
63: if ($r->header_in('Content-length')) {
64: $r->read($buffer,$r->header_in('Content-length'),0);
65: }
1.113 albertel 66: my $content_type = $r->header_in('Content-type');
67: if ($content_type !~ m{^multipart/form-data}) {
1.76 albertel 68: my @pairs=split(/&/,$buffer);
69: my $pair;
70: foreach $pair (@pairs) {
71: my ($name,$value) = split(/=/,$pair);
72: $value =~ tr/+/ /;
73: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
74: $name =~ tr/+/ /;
75: $name =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
1.114 raeburn 76: if (ref($fields) eq 'ARRAY') {
77: next if (!grep(/^\Q$name\E$/,@{$fields}));
78: }
1.77 albertel 79: &Apache::loncommon::add_to_env("form.$name",$value);
1.76 albertel 80: }
81: } else {
1.113 albertel 82: my ($contentsep) = ($content_type =~ /boundary=\"?([^\";,]+)\"?/);
1.76 albertel 83: my @lines = split (/\n/,$buffer);
84: my $name='';
85: my $value='';
86: my $fname='';
87: my $fmime='';
88: my $i;
89: for ($i=0;$i<=$#lines;$i++) {
1.113 albertel 90: if ($lines[$i]=~/^--\Q$contentsep\E/) {
1.76 albertel 91: if ($name) {
92: chomp($value);
1.114 raeburn 93: if (ref($fields) eq 'ARRAY') {
94: next if (!grep(/^\Q$name\E$/,@{$fields}));
95: }
1.118 ! raeburn 96: if ($fname) {
! 97: if ($env{'form.symb'} ne '') {
! 98: my $size = (length($value))/(1024.0 * 1024.0);
! 99: if (&upload_size_allowed($name,$size,$fname) eq 'ok') {
! 100: $env{"form.$name.filename"}=$fname;
! 101: $env{"form.$name.mimetype"}=$fmime;
! 102: &Apache::loncommon::add_to_env("form.$name",$value);
! 103: }
! 104: } else {
! 105: $env{"form.$name.filename"}=$fname;
! 106: $env{"form.$name.mimetype"}=$fmime;
! 107: &Apache::loncommon::add_to_env("form.$name",$value);
! 108: }
! 109: } else {
! 110: $value=~s/\s+$//s;
! 111: &Apache::loncommon::add_to_env("form.$name",$value);
! 112: }
1.76 albertel 113: }
114: if ($i<$#lines) {
115: $i++;
116: $lines[$i]=~
117: /Content\-Disposition\:\s*form\-data\;\s*name\=\"([^\"]+)\"/i;
118: $name=$1;
119: $value='';
120: if ($lines[$i]=~/filename\=\"([^\"]+)\"/i) {
121: $fname=$1;
122: if
123: ($lines[$i+1]=~/Content\-Type\:\s*([\w\-\/]+)/i) {
124: $fmime=$1;
125: $i++;
126: } else {
127: $fmime='';
128: }
129: } else {
130: $fname='';
131: $fmime='';
132: }
133: $i++;
134: }
135: } else {
136: $value.=$lines[$i]."\n";
137: }
138: }
139: }
140: #
141: # Digested POSTed values
142: #
143: # Remember the way this was originally done (GET or POST)
144: #
145: $env{'request.method'}=$ENV{'REQUEST_METHOD'};
146: #
147: # There may also be stuff in the query string
148: # Tell subsequent handlers that this was GET, not POST, so they can access query string.
149: # Also, unset POSTed content length to cover all tracks.
150: #
151:
152: $r->method_number(M_GET);
153:
154: $r->method('GET');
155: $r->headers_in->unset('Content-length');
156: }
157:
1.118 ! raeburn 158: #
! 159: # Perform size checks for file uploads to essayresponse items in course context.
! 160: #
! 161: # Add form.HWFILESIZE.$part_$id to %env with file size (MB)
! 162: # If file exceeds maximum allowed size, add form.HWFILETOOBIG.$part_$id to %env.
! 163: #
! 164:
! 165: sub upload_size_allowed {
! 166: my ($name,$size,$fname) = @_;
! 167: if ($name =~ /^HWFILE(\w+)$/) {
! 168: my $ident = $1;
! 169: my $item = 'HWFILESIZE'.$ident;
! 170: &Apache::loncommon::add_to_env("form.$item",$size);
! 171: my $maxsize= &Apache::lonnet::EXT("resource.$ident.maxfilesize");
! 172: if (!$maxsize) {
! 173: $maxsize = 100.0;
! 174: }
! 175: if ($size > $maxsize) {
! 176: my $warn = 'HWFILETOOBIG'.$ident;
! 177: &Apache::loncommon::add_to_env("form.$warn",$fname);
! 178: return;
! 179: }
! 180: }
! 181: return 'ok';
! 182: }
! 183:
1.94 albertel 184: # handle the case of the single sign on user, at this point $r->user
185: # will be set and valid now need to find the loncapa user info and possibly
186: # balance them
187: # returns OK if it was a SSO and user was handled
188: # undef if not SSO or no means to hanle the user
1.117 jms 189:
1.94 albertel 190: sub sso_login {
1.111 albertel 191: my ($r,$handle) = @_;
1.94 albertel 192:
193: my $lonidsdir=$r->dir_config('lonIDsDir');
194: if (!($r->user
195: && (!defined($env{'user.name'}) && !defined($env{'user.domain'}))
1.111 albertel 196: && ($handle eq ''))) {
1.94 albertel 197: # not an SSO case or already logged in
198: return undef;
199: }
200:
1.97 albertel 201: my ($user) = ($r->user =~ m/([a-zA-Z0-9_\-@.]*)/);
202:
1.94 albertel 203: my $domain = $r->dir_config('lonDefDomain');
1.97 albertel 204: my $home=&Apache::lonnet::homeserver($user,$domain);
1.94 albertel 205: if ($home !~ /(con_lost|no_host|no_such_host)/) {
1.107 albertel 206: &Apache::lonnet::logthis(" SSO authorized user $user ");
1.94 albertel 207: if ($r->dir_config("lonBalancer") eq 'yes') {
208: # login but immeaditly go to switch server to find us a new
209: # machine
1.97 albertel 210: &Apache::lonauth::success($r,$user,$domain,$home,'noredirect');
1.105 raeburn 211: $env{'request.sso.login'} = 1;
1.106 raeburn 212: if (defined($r->dir_config("lonSSOReloginServer"))) {
213: $env{'request.sso.reloginserver'} =
214: $r->dir_config('lonSSOReloginServer');
215: }
1.94 albertel 216: $r->internal_redirect('/adm/switchserver');
1.101 albertel 217: $r->set_handlers('PerlHandler'=> undef);
1.94 albertel 218: } else {
219: # need to login them in, so generate the need data that
220: # migrate expects to do login
221: my %info=('ip' => $r->connection->remote_ip(),
222: 'domain' => $domain,
1.97 albertel 223: 'username' => $user,
1.94 albertel 224: 'server' => $r->dir_config('lonHostID'),
225: 'sso.login' => 1
226: );
1.116 raeburn 227: if ($r->dir_config("ssodirecturl") == 1) {
228: $info{'origurl'} = $r->uri;
229: }
1.106 raeburn 230: if (defined($r->dir_config("lonSSOReloginServer"))) {
231: $info{'sso.reloginserver'} =
232: $r->dir_config('lonSSOReloginServer');
233: }
1.94 albertel 234: my $token =
235: &Apache::lonnet::tmpput(\%info,
236: $r->dir_config('lonHostID'));
237: $env{'form.token'} = $token;
238: $r->internal_redirect('/adm/migrateuser');
1.101 albertel 239: $r->set_handlers('PerlHandler'=> undef);
1.94 albertel 240: }
241: return OK;
1.98 albertel 242: } elsif (defined($r->dir_config('lonSSOUserUnknownRedirect'))) {
1.107 albertel 243: &Apache::lonnet::logthis(" SSO authorized unknown user $user ");
1.104 raeburn 244: $r->subprocess_env->set('SSOUserUnknown' => $user);
245: $r->subprocess_env->set('SSOUserDomain' => $domain);
1.115 raeburn 246: my @cancreate;
247: my %domconfig =
248: &Apache::lonnet::get_dom('configuration',['usercreation'],$domain);
249: if (ref($domconfig{'usercreation'}) eq 'HASH') {
250: if (ref($domconfig{'usercreation'}{'cancreate'}) eq 'HASH') {
251: if (ref($domconfig{'usercreation'}{'cancreate'}{'selfcreate'}) eq 'ARRAY') {
252: @cancreate = @{$domconfig{'usercreation'}{'cancreate'}{'selfcreate'}};
253: } elsif (($domconfig{'usercreation'}{'cancreate'}{'selfcreate'} ne 'none') &&
254: ($domconfig{'usercreation'}{'cancreate'}{'selfcreate'} ne '')) {
255: @cancreate = ($domconfig{'usercreation'}{'cancreate'}{'selfcreate'});
256: }
257: }
258: }
259: if (grep(/^sso$/,@cancreate)) {
260: $r->internal_redirect('/adm/createaccount');
261: } else {
262: $r->internal_redirect($r->dir_config('lonSSOUserUnknownRedirect'));
263: }
1.101 albertel 264: $r->set_handlers('PerlHandler'=> undef);
1.94 albertel 265: return OK;
266: }
267: return undef;
268: }
269:
1.1 albertel 270: sub handler {
271: my $r = shift;
272: my $requrl=$r->uri;
1.108 raeburn 273: if (&Apache::lonnet::is_domainimage($requrl)) {
274: return OK;
275: }
1.70 albertel 276:
1.111 albertel 277:
278: my $handle = &Apache::lonnet::check_for_valid_session($r);
1.93 albertel 279:
1.111 albertel 280: my $result = &sso_login($r,$handle);
1.100 albertel 281: if (defined($result)) {
1.116 raeburn 282: return $result;
1.70 albertel 283: }
284:
1.94 albertel 285:
1.70 albertel 286: if ($r->dir_config("lonBalancer") eq 'yes') {
287: $r->set_handlers('PerlResponseHandler'=>
288: [\&Apache::switchserver::handler]);
289: }
1.92 albertel 290:
291: if ($handle eq '') {
292: $r->log_reason("Cookie $handle not valid", $r->filename);
1.111 albertel 293: } elsif ($handle ne '') {
1.6 www 294:
1.46 www 295: # ------------------------------------------------------ Initialize Environment
1.111 albertel 296: my $lonidsdir=$r->dir_config('lonIDsDir');
1.92 albertel 297: &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);
1.47 www 298:
299: # --------------------------------------------------------- Initialize Language
300:
1.92 albertel 301: &Apache::lonlocal::get_language_handle($r);
302:
303: }
1.46 www 304:
1.92 albertel 305: # -------------------------------------------------- Should be a valid user now
306: if ($env{'user.name'} ne '' && $env{'user.domain'} ne '') {
1.46 www 307: # -------------------------------------------------------------- Resource State
1.6 www 308:
1.92 albertel 309: if ($requrl=~/^\/+(res|uploaded)\//) {
310: $env{'request.state'} = "published";
311: } else {
312: $env{'request.state'} = 'unknown';
313: }
314: $env{'request.filename'} = $r->filename;
315: $env{'request.noversionuri'} = &Apache::lonnet::deversion($requrl);
1.6 www 316: # -------------------------------------------------------- Load POST parameters
317:
1.92 albertel 318: &Apache::lonacc::get_posted_cgi($r);
1.6 www 319:
320: # ---------------------------------------------------------------- Check access
1.92 albertel 321: my $now = time;
1.95 albertel 322: if ($requrl !~ m{^/(?:adm|public|prtspool)/}
323: || $requrl =~ /^\/adm\/.*\/(smppg|bulletinboard)(\?|$ )/x) {
1.92 albertel 324: my $access=&Apache::lonnet::allowed('bre',$requrl);
325: if ($access eq '1') {
326: $env{'user.error.msg'}="$requrl:bre:0:0:Choose Course";
327: return HTTP_NOT_ACCEPTABLE;
328: }
329: if ($access eq 'A') {
330: &Apache::restrictedaccess::setup_handler($r);
331: return OK;
332: }
1.103 raeburn 333: if ($access eq 'B') {
334: &Apache::blockedaccess::setup_handler($r);
335: return OK;
336: }
1.92 albertel 337: if (($access ne '2') && ($access ne 'F')) {
338: $env{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
339: return HTTP_NOT_ACCEPTABLE;
1.37 albertel 340: }
1.92 albertel 341: }
342: if ($requrl =~ m|^/prtspool/|) {
343: my $start='/prtspool/'.$env{'user.name'}.'_'.
344: $env{'user.domain'};
345: if ($requrl !~ /^\Q$start\E/) {
346: $env{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
347: return HTTP_NOT_ACCEPTABLE;
1.67 albertel 348: }
1.92 albertel 349: }
1.109 banghart 350: if ($requrl =~ m|^/zipspool/|) {
1.110 banghart 351: my $start='/zipspool/zipout/'.$env{'user.name'}.":".
1.109 banghart 352: $env{'user.domain'};
353: if ($requrl !~ /^\Q$start\E/) {
354: $env{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
355: return HTTP_NOT_ACCEPTABLE;
356: }
357: }
1.92 albertel 358: if ($env{'user.name'} eq 'public' &&
359: $env{'user.domain'} eq 'public' &&
360: $requrl !~ m{^/+(res|public|uploaded)/} &&
361: $requrl !~ m{^/adm/[^/]+/[^/]+/aboutme/portfolio$ }x &&
362: $requrl !~ m{^/+adm/(help|logout|restrictedaccess|randomlabel\.png)}) {
363: $env{'request.querystring'}=$r->args;
364: $env{'request.firsturl'}=$requrl;
365: return FORBIDDEN;
366: }
1.23 www 367: # ------------------------------------------------------------- This is allowed
1.92 albertel 368: if ($env{'request.course.id'}) {
1.24 www 369: &Apache::lonnet::countacc($requrl);
1.92 albertel 370: $requrl=~/\.(\w+)$/;
371: if ((&Apache::loncommon::fileembstyle($1) eq 'ssi') ||
372: ($requrl=~/^\/adm\/.*\/(aboutme|navmaps|smppg|bulletinboard)(\?|$ )/x) ||
373: ($requrl=~/^\/adm\/wrapper\//) ||
374: ($requrl=~m|^/adm/coursedocs/showdoc/|) ||
375: ($requrl=~m|\.problem/smpedit$|) ||
376: ($requrl=~/^\/public\/.*\/syllabus$/)) {
1.23 www 377: # ------------------------------------- This is serious stuff, get symb and log
1.29 www 378: my $query=$r->args;
1.92 albertel 379: my $symb;
380: if ($query) {
1.29 www 381: &Apache::loncommon::get_unprocessed_cgi($query,['symb']);
1.92 albertel 382: }
383: if ($env{'form.symb'}) {
1.64 albertel 384: $symb=&Apache::lonnet::symbclean($env{'form.symb'});
1.92 albertel 385: if ($requrl =~ m|^/adm/wrapper/|
1.72 albertel 386: || $requrl =~ m|^/adm/coursedocs/showdoc/|) {
1.92 albertel 387: my ($map,$mid,$murl)=&Apache::lonnet::decode_symb($symb);
388: &Apache::lonnet::symblist($map,$murl => [$murl,$mid],
1.63 albertel 389: 'last_known' =>[$murl,$mid]);
1.92 albertel 390: } elsif ((&Apache::lonnet::symbverify($symb,$requrl)) ||
1.53 albertel 391: (($requrl=~m|(.*)/smpedit$|) &&
392: &Apache::lonnet::symbverify($symb,$1))) {
1.92 albertel 393: my ($map,$mid,$murl)=&Apache::lonnet::decode_symb($symb);
394: &Apache::lonnet::symblist($map,$murl => [$murl,$mid],
395: 'last_known' =>[$murl,$mid]);
1.31 www 396: } else {
397: $r->log_reason('Invalid symb for '.$requrl.': '.
1.92 albertel 398: $symb);
399: $env{'user.error.msg'}=
400: "$requrl:bre:1:1:Invalid Access";
401: return HTTP_NOT_ACCEPTABLE;
402: }
403: } else {
404: $symb=&Apache::lonnet::symbread($requrl);
1.58 albertel 405: if (&Apache::lonnet::is_on_map($requrl) && $symb &&
1.56 albertel 406: !&Apache::lonnet::symbverify($symb,$requrl)) {
1.58 albertel 407: $r->log_reason('Invalid symb for '.$requrl.': '.$symb);
1.92 albertel 408: $env{'user.error.msg'}=
409: "$requrl:bre:1:1:Invalid Access";
410: return HTTP_NOT_ACCEPTABLE;
1.55 albertel 411: }
1.61 albertel 412: if ($symb) {
1.65 albertel 413: my ($map,$mid,$murl)=
414: &Apache::lonnet::decode_symb($symb);
1.63 albertel 415: &Apache::lonnet::symblist($map,$murl =>[$murl,$mid],
1.92 albertel 416: 'last_known' =>[$murl,$mid]);
1.61 albertel 417: }
1.92 albertel 418: }
419: $env{'request.symb'}=$symb;
420: &Apache::lonnet::courseacclog($symb);
421: } else {
1.23 www 422: # ------------------------------------------------------- This is other content
1.92 albertel 423: &Apache::lonnet::courseacclog($requrl);
424: }
1.88 albertel 425: }
1.92 albertel 426: return OK;
427: }
1.21 www 428: # -------------------------------------------- See if this is a public resource
1.68 albertel 429: if ($requrl=~m|^/+adm/+help/+|) {
1.89 albertel 430: return OK;
1.68 albertel 431: }
1.90 albertel 432: # ------------------------------------ See if this is a viewable portfolio file
1.89 albertel 433: if (&Apache::lonnet::is_portfolio_url($requrl)) {
1.90 albertel 434: my $access=&Apache::lonnet::allowed('bre',$requrl);
435: if ($access eq 'A') {
436: &Apache::restrictedaccess::setup_handler($r);
437: return OK;
438: }
439: if (($access ne '2') && ($access ne 'F')) {
440: $env{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
441: return HTTP_NOT_ACCEPTABLE;
442: }
1.79 raeburn 443: }
1.87 albertel 444:
1.34 www 445: # -------------------------------------------------------------- Not authorized
446: $requrl=~/\.(\w+)$/;
1.62 albertel 447: # if ((&Apache::loncommon::fileembstyle($1) eq 'ssi') ||
448: # ($requrl=~/^\/adm\/(roles|logout|email|menu|remote)/) ||
449: # ($requrl=~m|^/prtspool/|)) {
1.34 www 450: # -------------------------- Store where they wanted to go and get login screen
1.64 albertel 451: $env{'request.querystring'}=$r->args;
452: $env{'request.firsturl'}=$requrl;
1.34 www 453: return FORBIDDEN;
1.62 albertel 454: # } else {
1.34 www 455: # --------------------------------------------------------------------- Goodbye
1.62 albertel 456: # return HTTP_BAD_REQUEST;
457: # }
1.1 albertel 458: }
459:
460: 1;
461: __END__
1.25 harris41 462:
463: =head1 NAME
464:
465: Apache::lonacc - Cookie Based Access Handler
466:
467: =head1 SYNOPSIS
468:
469: Invoked (for various locations) by /etc/httpd/conf/srm.conf:
470:
471: PerlAccessHandler Apache::lonacc
472:
473: =head1 INTRODUCTION
474:
475: This module enables cookie based authentication and is used
476: to control access for many different LON-CAPA URIs.
477:
478: Whenever the client sends the cookie back to the server,
479: this cookie is handled by either lonacc.pm or loncacc.pm
480: (see srm.conf for what is invoked when). If
481: the cookie is missing or invalid, the user is re-challenged
482: for login information.
483:
484: This is part of the LearningOnline Network with CAPA project
485: described at http://www.lon-capa.org.
486:
487: =head1 HANDLER SUBROUTINE
488:
489: This routine is called by Apache and mod_perl.
490:
491: =over 4
492:
493: =item *
494:
495: transfer profile into environment
496:
497: =item *
498:
499: load POST parameters
500:
501: =item *
502:
503: check access
504:
505: =item *
506:
507: if allowed, get symb, log, generate course statistics if applicable
508:
509: =item *
510:
511: otherwise return error
512:
513: =item *
514:
515: see if public resource
516:
517: =item *
518:
519: store attempted access
520:
521: =back
522:
523: =cut
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