1: # The LearningOnline Network
2: # Cookie Based Access Handler
3: #
4: # $Id: lonacc.pm,v 1.195 2021/10/25 15:23:34 raeburn 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: =head1 NAME
31:
32: Apache::lonacc - Cookie Based Access Handler
33:
34: =head1 SYNOPSIS
35:
36: Invoked (for various locations) by /etc/httpd/conf/srm.conf:
37:
38: PerlAccessHandler Apache::lonacc
39:
40: =head1 INTRODUCTION
41:
42: This module enables cookie based authentication and is used
43: to control access for many different LON-CAPA URIs.
44:
45: Whenever the client sends the cookie back to the server,
46: this cookie is handled by either lonacc.pm or loncacc.pm
47: (see srm.conf for what is invoked when). If
48: the cookie is missing or invalid, the user is re-challenged
49: for login information.
50:
51: This is part of the LearningOnline Network with CAPA project
52: described at http://www.lon-capa.org.
53:
54: =head1 HANDLER SUBROUTINE
55:
56: This routine is called by Apache and mod_perl.
57:
58: =over 4
59:
60: =item *
61:
62: transfer profile into environment
63:
64: =item *
65:
66: load POST parameters
67:
68: =item *
69:
70: check access
71:
72: =item *
73:
74: if allowed, get symb, log, generate course statistics if applicable
75:
76: =item *
77:
78: otherwise return error
79:
80: =item *
81:
82: see if public resource
83:
84: =item *
85:
86: store attempted access
87:
88: =back
89:
90: =head1 NOTABLE SUBROUTINES
91:
92: =cut
93:
94:
95: package Apache::lonacc;
96:
97: use strict;
98: use Apache::Constants qw(:common :http :methods);
99: use Apache::File;
100: use Apache::lonnet;
101: use Apache::loncommon();
102: use Apache::lonlocal;
103: use Apache::restrictedaccess();
104: use Apache::blockedaccess();
105: use Apache::lonprotected();
106: use Fcntl qw(:flock);
107: use LONCAPA qw(:DEFAULT :match);
108:
109: sub cleanup {
110: my ($r)=@_;
111: if (! $r->is_initial_req()) { return DECLINED; }
112: &Apache::lonnet::save_cache();
113: return OK;
114: }
115:
116: sub goodbye {
117: my ($r)=@_;
118: &Apache::lonnet::goodbye();
119: return DONE;
120: }
121:
122: ###############################################
123:
124: sub get_posted_cgi {
125: my ($r,$fields) = @_;
126:
127: my $buffer;
128: if ($r->header_in('Content-length')) {
129: $r->read($buffer,$r->header_in('Content-length'),0);
130: }
131: my $content_type = $r->header_in('Content-type');
132: if ($content_type !~ m{^multipart/form-data}) {
133: my @pairs=split(/&/,$buffer);
134: my $pair;
135: foreach $pair (@pairs) {
136: my ($name,$value) = split(/=/,$pair);
137: $value =~ tr/+/ /;
138: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
139: $name =~ tr/+/ /;
140: $name =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
141: if (ref($fields) eq 'ARRAY') {
142: next if (!grep(/^\Q$name\E$/,@{$fields}));
143: }
144: &Apache::loncommon::add_to_env("form.$name",$value);
145: }
146: } else {
147: my ($contentsep) = ($content_type =~ /boundary=\"?([^\";,]+)\"?/);
148: my @lines = split (/\n/,$buffer);
149: my $name='';
150: my $value='';
151: my $fname='';
152: my $fmime='';
153: my $i;
154: for ($i=0;$i<=$#lines;$i++) {
155: if ($lines[$i]=~/^--\Q$contentsep\E/) {
156: if ($name) {
157: chomp($value);
158: if (($r->uri eq '/adm/portfolio') &&
159: ($name eq 'uploaddoc')) {
160: if (length($value) == 1) {
161: $value=~s/[\r\n]$//;
162: }
163: } elsif ($fname =~ /\.(xls|doc|ppt)(x|m)$/i) {
164: $value=~s/[\r\n]$//;
165: }
166: if (ref($fields) eq 'ARRAY') {
167: next if (!grep(/^\Q$name\E$/,@{$fields}));
168: }
169: if ($fname) {
170: if ($env{'form.symb'} ne '') {
171: my $size = (length($value))/(1024.0 * 1024.0);
172: if (&upload_size_allowed($name,$size,$fname) eq 'ok') {
173: $env{"form.$name.filename"}=$fname;
174: $env{"form.$name.mimetype"}=$fmime;
175: &Apache::loncommon::add_to_env("form.$name",$value);
176: }
177: } else {
178: $env{"form.$name.filename"}=$fname;
179: $env{"form.$name.mimetype"}=$fmime;
180: &Apache::loncommon::add_to_env("form.$name",$value);
181: }
182: } else {
183: $value=~s/\s+$//s;
184: &Apache::loncommon::add_to_env("form.$name",$value);
185: }
186: }
187: if ($i<$#lines) {
188: $i++;
189: $lines[$i]=~
190: /Content\-Disposition\:\s*form\-data\;\s*name\=\"([^\"]+)\"/i;
191: $name=$1;
192: $value='';
193: if ($lines[$i]=~/filename\=\"([^\"]+)\"/i) {
194: $fname=$1;
195: if
196: ($lines[$i+1]=~/Content\-Type\:\s*([\w\-\/]+)/i) {
197: $fmime=$1;
198: $i++;
199: } else {
200: $fmime='';
201: }
202: } else {
203: $fname='';
204: $fmime='';
205: }
206: if ($i<$#lines && $lines[$i+1]=~/^Content\-Type\:\s*([\w\-\/]+)/i) {
207: # TODO: something with $1 !
208: $i++;
209: }
210: if ($i<$#lines && $lines[$i+1]=~/^Content\-transfer\-encoding\:\s*([\w\-\/]+)/i) {
211: # TODO: something with $1 !
212: $i++;
213: }
214: $i++;
215: }
216: } else {
217: $value.=$lines[$i]."\n";
218: }
219: }
220: }
221: #
222: # Digested POSTed values
223: #
224: # Remember the way this was originally done (GET or POST)
225: #
226: $env{'request.method'}=$ENV{'REQUEST_METHOD'};
227: #
228: # There may also be stuff in the query string
229: # Tell subsequent handlers that this was GET, not POST, so they can access query string.
230: # Also, unset POSTed content length to cover all tracks.
231: #
232:
233: $r->method_number(M_GET);
234:
235: $r->method('GET');
236: $r->headers_in->unset('Content-length');
237: }
238:
239: =pod
240:
241: =over
242:
243: =item upload_size_allowed()
244:
245: Perform size checks for file uploads to essayresponse items in course context.
246:
247: Add form.HWFILESIZE.$part_$id to %env with file size (MB)
248: If file exceeds maximum allowed size, add form.HWFILETOOBIG.$part_$id to %env.
249:
250: =cut
251:
252: sub upload_size_allowed {
253: my ($name,$size,$fname) = @_;
254: if ($name =~ /^HWFILE(\w+)$/) {
255: my $ident = $1;
256: my $item = 'HWFILESIZE'.$ident;
257: my $savesize = sprintf("%.6f",$size);
258: &Apache::loncommon::add_to_env("form.$item",$savesize);
259: my $maxsize= &Apache::lonnet::EXT("resource.$ident.maxfilesize");
260: if (!$maxsize) {
261: $maxsize = 10.0; # FIXME This should become a domain configuration.
262: }
263: if ($size > $maxsize) {
264: my $warn = 'HWFILETOOBIG'.$ident;
265: &Apache::loncommon::add_to_env("form.$warn",$fname);
266: return;
267: }
268: }
269: return 'ok';
270: }
271:
272: =pod
273:
274: =item sso_login()
275:
276: handle the case of the single sign on user, at this point $r->user
277: will be set and valid; now need to find the loncapa user info, and possibly
278: balance them. If $r->user() is set this means either it was either set by
279: SSO or by checkauthen.pm, if a valid cookie was found. The latter case can
280: be identified by the third arg ($usename), except when lonacc is called in
281: an internal redirect to /adm/switchserver (e.g., load-balancing following
282: successful authentication) -- no cookie set yet. For that particular case
283: simply skip the call to sso_login().
284:
285: returns OK if it was SSO and user was handled.
286: returns undef if not SSO or no means to handle the user.
287:
288: =cut
289:
290: sub sso_login {
291: my ($r,$handle,$username) = @_;
292:
293: if (($r->user eq '') || ($username ne '') || ($r->user eq 'public:public') ||
294: (defined($env{'user.name'}) && (defined($env{'user.domain'}))
295: && ($handle ne ''))) {
296: # not an SSO case or already logged in
297: return undef;
298: }
299:
300: my ($user) = ($r->user =~ m/^($match_username)$/);
301: if ($user eq '') {
302: return undef;
303: }
304:
305: my $query = $r->args;
306: my %form;
307: if ($query) {
308: my @items = ('role','symb','iptoken','origurl','ltoken','linkkey');
309: &Apache::loncommon::get_unprocessed_cgi($query,\@items);
310: foreach my $item (@items) {
311: if (defined($env{'form.'.$item})) {
312: $form{$item} = $env{'form.'.$item};
313: }
314: }
315: }
316:
317: my %sessiondata;
318: if ($form{'iptoken'}) {
319: %sessiondata = &Apache::lonnet::tmpget($form{'iptoken'});
320: my $delete = &Apache::lonnet::tmpdel($form{'iptoken'});
321: unless ($sessiondata{'sessionserver'}) {
322: delete($form{'iptoken'});
323: }
324: }
325:
326: my ($linkprot,$linkkey);
327: if ($form{'ltoken'}) {
328: my %link_info = &Apache::lonnet::tmpget($form{'ltoken'});
329: $linkprot = $link_info{'linkprot'};
330: my $delete = &Apache::lonnet::tmpdel($form{'ltoken'});
331: }
332: if ($form{'linkkey'} ne '') {
333: $linkkey = $form{'linkkey'};
334: }
335:
336: my $domain = $r->dir_config('lonSSOUserDomain');
337: if ($domain eq '') {
338: $domain = $r->dir_config('lonDefDomain');
339: }
340: my $home=&Apache::lonnet::homeserver($user,$domain);
341: if ($home !~ /(con_lost|no_host|no_such_host)/) {
342: &Apache::lonnet::logthis(" SSO authorized user $user ");
343: my ($is_balancer,$otherserver,$hosthere);
344: if ($form{'iptoken'}) {
345: if (($sessiondata{'domain'} eq $domain) &&
346: ($sessiondata{'username'} eq $user)) {
347: $hosthere = 1;
348: }
349: }
350: unless ($hosthere) {
351: ($is_balancer,$otherserver) =
352: &Apache::lonnet::check_loadbalancing($user,$domain,'login');
353: if ($is_balancer) {
354: # Check if browser sent a LON-CAPA load balancer cookie (and this is a balancer)
355: my ($found_server,$balancer_cookie) = &Apache::lonnet::check_for_balancer_cookie($r);
356: if (($found_server) && ($balancer_cookie =~ /^\Q$domain\E_\Q$user\E_/)) {
357: $otherserver = $found_server;
358: } elsif ($otherserver eq '') {
359: my $lowest_load;
360: ($otherserver,undef,undef,undef,$lowest_load) = &Apache::lonnet::choose_server($domain);
361: if ($lowest_load > 100) {
362: $otherserver = &Apache::lonnet::spareserver($r,$lowest_load,$lowest_load,1,$domain);
363: }
364: if ($otherserver ne '') {
365: my @hosts = &Apache::lonnet::current_machine_ids();
366: if (grep(/^\Q$otherserver\E$/,@hosts)) {
367: $hosthere = $otherserver;
368: }
369: }
370: }
371: }
372: }
373: if (($is_balancer) && (!$hosthere)) {
374: # login but immediately go to switch server to find us a new
375: # machine
376: &Apache::lonauth::success($r,$user,$domain,$home,'noredirect');
377: foreach my $item (keys(%form)) {
378: $env{'form.'.$item} = $form{$item};
379: }
380: unless (($form{'symb'}) || ($form{'origurl'})) {
381: unless (($r->uri eq '/adm/roles') || ($r->uri eq '/adm/sso')) {
382: $env{'form.origurl'} = $r->uri;
383: }
384: }
385: if (($r->uri eq '/adm/sso') && ($form{'origurl'} =~ m{^/+tiny/+$match_domain/+\w+$})) {
386: $env{'request.deeplink.login'} = $form{'origurl'};
387: } elsif ($r->uri =~ m{^/+tiny/+$match_domain/+\w+$}) {
388: $env{'request.deeplink.login'} = $r->uri;
389: }
390: if ($env{'request.deeplink.login'}) {
391: if ($linkprot) {
392: $env{'request.linkprot'} = $linkprot);
393: } elsif ($linkkey ne '') {
394: $env{'request.linkkey'} = $linkkey);
395: }
396: }
397: $env{'request.sso.login'} = 1;
398: if (defined($r->dir_config("lonSSOReloginServer"))) {
399: $env{'request.sso.reloginserver'} =
400: $r->dir_config('lonSSOReloginServer');
401: }
402: my $redirecturl = '/adm/switchserver';
403: if ($otherserver ne '') {
404: $redirecturl .= '?otherserver='.$otherserver;
405: }
406: $r->internal_redirect($redirecturl);
407: $r->set_handlers('PerlHandler'=> undef);
408: } else {
409: # need to login them in, so generate the need data that
410: # migrate expects to do login
411: my $ip = &Apache::lonnet::get_requestor_ip($r);
412: my %info=('ip' => $ip,
413: 'domain' => $domain,
414: 'username' => $user,
415: 'server' => $r->dir_config('lonHostID'),
416: 'sso.login' => 1
417: );
418: foreach my $item ('role','symb','iptoken','origurl') {
419: if (exists($form{$item})) {
420: $info{$item} = $form{$item};
421: }
422: }
423: unless (($info{'symb'}) || ($info{'origurl'})) {
424: unless (($r->uri eq '/adm/roles') || ($r->uri eq '/adm/sso')) {
425: $info{'origurl'} = $r->uri;
426: }
427: }
428: if (($r->uri eq '/adm/sso') && ($form{'origurl'} =~ m{^/+tiny/+$match_domain/+\w+$})) {
429: $info{'deeplink.login'} = $form{'origurl'};
430: } elsif ($r->uri =~ m{^/+tiny/+$match_domain/+\w+$}) {
431: $info{'deeplink.login'} = $r->uri;
432: }
433: if ($info{'deeplink.login'}) {
434: if ($linkprot) {
435: $info{'linkprot'} = $linkprot;
436: } elsif ($linkkey ne '') {
437: $info{'linkkey'} = $linkkey;
438: }
439: }
440: if ($r->dir_config("ssodirecturl") == 1) {
441: $info{'origurl'} = $r->uri;
442: }
443: if (defined($r->dir_config("lonSSOReloginServer"))) {
444: $info{'sso.reloginserver'} =
445: $r->dir_config('lonSSOReloginServer');
446: }
447: if (($is_balancer) && ($hosthere)) {
448: $info{'noloadbalance'} = $hosthere;
449: }
450: my $token =
451: &Apache::lonnet::tmpput(\%info,
452: $r->dir_config('lonHostID'));
453: $env{'form.token'} = $token;
454: $r->internal_redirect('/adm/migrateuser');
455: $r->set_handlers('PerlHandler'=> undef);
456: }
457: return OK;
458: } else {
459: &Apache::lonnet::logthis(" SSO authorized unknown user $user ");
460: my @cancreate;
461: my %domconfig =
462: &Apache::lonnet::get_dom('configuration',['usercreation'],$domain);
463: if (ref($domconfig{'usercreation'}) eq 'HASH') {
464: if (ref($domconfig{'usercreation'}{'cancreate'}) eq 'HASH') {
465: if (ref($domconfig{'usercreation'}{'cancreate'}{'selfcreate'}) eq 'ARRAY') {
466: @cancreate = @{$domconfig{'usercreation'}{'cancreate'}{'selfcreate'}};
467: } elsif (($domconfig{'usercreation'}{'cancreate'}{'selfcreate'} ne 'none') &&
468: ($domconfig{'usercreation'}{'cancreate'}{'selfcreate'} ne '')) {
469: @cancreate = ($domconfig{'usercreation'}{'cancreate'}{'selfcreate'});
470: }
471: }
472: }
473: if ((grep(/^sso$/,@cancreate)) || (defined($r->dir_config('lonSSOUserUnknownRedirect')))) {
474: $r->subprocess_env->set('SSOUserUnknown' => $user);
475: $r->subprocess_env->set('SSOUserDomain' => $domain);
476: if (grep(/^sso$/,@cancreate)) {
477: $r->set_handlers('PerlHandler'=> [\&Apache::createaccount::handler]);
478: $r->handler('perl-script');
479: } else {
480: $r->internal_redirect($r->dir_config('lonSSOUserUnknownRedirect'));
481: $r->set_handlers('PerlHandler'=> undef);
482: }
483: return OK;
484: }
485: }
486: return undef;
487: }
488:
489: sub handler {
490: my $r = shift;
491: my $requrl=$r->uri;
492:
493: if ($requrl =~ m{^/res/adm/pages/[^/]+\.(gif|png)$}) {
494: return OK;
495: }
496:
497: if (&Apache::lonnet::is_domainimage($requrl)) {
498: return OK;
499: }
500:
501: my %user;
502: my $handle = &Apache::lonnet::check_for_valid_session($r,undef,\%user);
503:
504: unless (($requrl eq '/adm/switchserver') && (!$r->is_initial_req())) {
505: my $result = &sso_login($r,$handle,$user{'name'});
506: if (defined($result)) {
507: return $result;
508: }
509: }
510:
511: my ($is_balancer,$otherserver);
512:
513: if ($handle eq '') {
514: unless ((($requrl eq '/adm/switchserver') && (!$r->is_initial_req())) ||
515: ($requrl =~ m{^/public/$match_domain/$match_courseid/syllabus}) ||
516: ($requrl =~ m{^/adm/help/}) ||
517: ($requrl =~ m{^/res/$match_domain/$match_username/})) {
518: $r->log_reason("Cookie not valid", $r->filename);
519: }
520: } elsif ($handle ne '') {
521:
522: # ------------------------------------------------------ Initialize Environment
523: my $lonidsdir=$r->dir_config('lonIDsDir');
524: &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);
525:
526: # --------------------------------------------------------- Initialize Language
527:
528: &Apache::lonlocal::get_language_handle($r);
529:
530: }
531:
532: # -------------------------------------------------- Should be a valid user now
533: if ($env{'user.name'} ne '' && $env{'user.domain'} ne '') {
534: # -------------------------------------------------------------- Resource State
535:
536: my ($cdom,$cnum);
537: if ($env{'request.course.id'}) {
538: $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
539: $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
540: }
541: if ($requrl=~/^\/+(res|uploaded)\//) {
542: $env{'request.state'} = "published";
543: } else {
544: $env{'request.state'} = 'unknown';
545: }
546: $env{'request.filename'} = $r->filename;
547: $env{'request.noversionuri'} = &Apache::lonnet::deversion($requrl);
548: my ($suppext,$checkabsolute);
549: if ($requrl =~ m{^/adm/wrapper/ext/}) {
550: my $query = $r->args;
551: if ($query) {
552: my $preserved;
553: foreach my $pair (split(/&/,$query)) {
554: my ($name, $value) = split(/=/,$pair);
555: unless (($name eq 'symb') || ($name eq 'usehttp')) {
556: $preserved .= $pair.'&';
557: }
558: if (($env{'request.course.id'}) && ($name eq 'folderpath')) {
559: if ($value =~ /^supplemental/) {
560: $suppext = 1;
561: }
562: }
563: }
564: $preserved =~ s/\&$//;
565: if ($preserved) {
566: $env{'request.external.querystring'} = $preserved;
567: }
568: }
569: if ($env{'request.course.id'}) {
570: $checkabsolute = 1;
571: }
572: } elsif ($env{'request.course.id'} &&
573: (($requrl =~ m{^/adm/$match_domain/$match_username/aboutme$}) ||
574: ($requrl eq "/public/$cdom/$cnum/syllabus") ||
575: ($requrl =~ m{^/adm/$cdom/$cnum/\d+/ext\.tool$}))) {
576: my $query = $r->args;
577: if ($query) {
578: foreach my $pair (split(/&/,$query)) {
579: my ($name, $value) = split(/=/,$pair);
580: if ($name eq 'folderpath') {
581: if ($value =~ /^supplemental/) {
582: $suppext = 1;
583: }
584: last;
585: }
586: }
587: }
588: if ($requrl =~ m{^/public/$cdom/$cnum/syllabus$}) {
589: $checkabsolute = 1;
590: }
591: }
592: if ($checkabsolute) {
593: my $hostname = $r->hostname();
594: my $lonhost = &Apache::lonnet::host_from_dns($hostname);
595: if ($lonhost) {
596: my $actual = &Apache::lonnet::absolute_url($hostname,1,1);
597: my $exphostname = &Apache::lonnet::hostname($lonhost);
598: my $expected = $Apache::lonnet::protocol{$lonhost}.'://'.$hostname;
599: unless ($actual eq $expected) {
600: $env{'request.use_absolute'} = $expected;
601: }
602: }
603: }
604: # -------------------------------------------------------- Load POST parameters
605:
606: &Apache::lonacc::get_posted_cgi($r);
607:
608: # ------------------------------------------------------ Check if load balancer
609:
610: my $checkexempt;
611: if ($env{'user.loadbalexempt'} eq $r->dir_config('lonHostID')) {
612: if ($env{'user.loadbalcheck.time'} + 600 > time) {
613: $checkexempt = 1;
614: }
615: }
616: if ($env{'user.noloadbalance'} eq $r->dir_config('lonHostID')) {
617: $checkexempt = 1;
618: }
619: unless (($checkexempt) || (($requrl eq '/adm/switchserver') && (!$r->is_initial_req()))) {
620: ($is_balancer,$otherserver) =
621: &Apache::lonnet::check_loadbalancing($env{'user.name'},
622: $env{'user.domain'});
623: if ($is_balancer) {
624: # Check if browser sent a LON-CAPA load balancer cookie (and this is a balancer)
625: my ($found_server,$balancer_cookie) = &Apache::lonnet::check_for_balancer_cookie($r);
626: if (($found_server) && ($balancer_cookie =~ /^\Q$env{'user.domain'}\E_\Q$env{'user.name'}\E_/)) {
627: $otherserver = $found_server;
628: }
629: unless ($requrl eq '/adm/switchserver') {
630: $r->set_handlers('PerlResponseHandler'=>
631: [\&Apache::switchserver::handler]);
632: }
633: if ($otherserver ne '') {
634: $env{'form.otherserver'} = $otherserver;
635: }
636: unless (($env{'form.origurl'}) || ($r->uri eq '/adm/roles') ||
637: ($r->uri eq '/adm/switchserver') || ($r->uri eq '/adm/sso')) {
638: $env{'form.origurl'} = $r->uri;
639: }
640: }
641: }
642: if ($requrl=~m{^/+tiny/+$match_domain/+\w+$}) {
643: if ($env{'user.name'} eq 'public' &&
644: $env{'user.domain'} eq 'public') {
645: $env{'request.firsturl'}=$requrl;
646: return FORBIDDEN;
647: } else {
648: return OK;
649: }
650: }
651: # ---------------------------------------------------------------- Check access
652: my $now = time;
653: my ($check_symb,$check_access,$check_block,$access,$poss_symb);
654: if ($requrl !~ m{^/(?:adm|public|(?:prt|zip)spool)/}
655: || $requrl =~ /^\/adm\/.*\/(smppg|bulletinboard)(\?|$ )/x) {
656: $check_access = 1;
657: }
658: if ((!$check_access) && ($env{'request.course.id'})) {
659: if (($requrl eq '/adm/viewclasslist') ||
660: ($requrl =~ m{^(/adm/wrapper|)\Q/uploaded/$cdom/$cnum/docs/\E}) ||
661: ($requrl =~ m{^/adm/.*/aboutme$}) ||
662: ($requrl=~m{^/adm/coursedocs/showdoc/}) ||
663: ($requrl=~m{^(/adm/wrapper|)/adm/$cdom/$cnum/\d+/ext\.tool$})) {
664: $check_block = 1;
665: }
666: }
667: if (($env{'request.course.id'}) && (!$suppext)) {
668: $requrl=~/\.(\w+)$/;
669: if ((&Apache::loncommon::fileembstyle($1) eq 'ssi') ||
670: ($requrl=~/^\/adm\/.*\/(aboutme|smppg|bulletinboard)(\?|$ )/x) ||
671: ($requrl=~/^\/adm\/wrapper\//) ||
672: ($requrl=~m|^/adm/coursedocs/showdoc/|) ||
673: ($requrl=~m|\.problem/smpedit$|) ||
674: ($requrl=~/^\/public\/.*\/syllabus$/) ||
675: ($requrl=~/^\/adm\/(viewclasslist|navmaps)$/) ||
676: ($requrl=~/^\/adm\/.*\/aboutme\/portfolio(\?|$)/) ||
677: ($requrl=~m{^/adm/$cdom/$cnum/\d+/ext\.tool$})) {
678: $check_symb = 1;
679: }
680: }
681: if (($check_access) || ($check_block)) {
682: if ($check_symb) {
683: if ($env{'form.symb'}) {
684: $poss_symb=&Apache::lonnet::symbclean($env{'form.symb'});
685: } elsif (($env{'request.course.id'}) && ($r->args ne '')) {
686: my $query = $r->args;
687: foreach my $pair (split(/&/,$query)) {
688: my ($name, $value) = split(/=/,$pair);
689: $name = &unescape($name);
690: $value =~ tr/+/ /;
691: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
692: if ($name eq 'symb') {
693: $poss_symb = &Apache::lonnet::symbclean($value);
694: last;
695: }
696: }
697: }
698: if ($poss_symb) {
699: my ($possmap,$resid,$url)=&Apache::lonnet::decode_symb($poss_symb);
700: $url = &Apache::lonnet::clutter($url);
701: my $toplevelmap = $env{'course.'.$env{'request.course.id'}.'.url'};
702: unless (($url eq $requrl) && (($possmap eq $toplevelmap) ||
703: (&Apache::lonnet::is_on_map($possmap)))) {
704: undef($poss_symb);
705: }
706: if ($poss_symb) {
707: if ((!$env{'request.role.adv'}) && ($env{'acc.randomout'}) &&
708: ($env{'acc.randomout'}=~/\&\Q$poss_symb\E\&/)) {
709: undef($poss_symb);
710: } elsif ((!$env{'request.role.adv'}) && ($env{'acc.deeplinkout'}) &&
711: ($env{'acc.deeplinkout'}=~/\&\Q$poss_symb\E\&/)) {
712: undef($poss_symb);
713: }
714: }
715: }
716: if ($poss_symb) {
717: $access=&Apache::lonnet::allowed('bre',$requrl,$poss_symb);
718: } else {
719: $access=&Apache::lonnet::allowed('bre',$requrl,'','','','',1);
720: }
721: } else {
722: my $nodeeplinkcheck;
723: if (($check_access) && ($requrl =~ /\.(sequence|page)$/)) {
724: unless ($env{'form.navmap'}) {
725: if ($r->args ne '') {
726: &Apache::loncommon::get_unprocessed_cgi($r->args,['navmap']);
727: unless ($env{'form.navmap'}) {
728: $nodeeplinkcheck = 1;
729: }
730: }
731: }
732: }
733: $access=&Apache::lonnet::allowed('bre',$requrl,'','','','','',$nodeeplinkcheck);
734: }
735: }
736: if ($check_block) {
737: if ($access eq 'B') {
738: if ($poss_symb) {
739: if (&Apache::lonnet::symbverify($poss_symb,$requrl)) {
740: $env{'request.symb'} = $poss_symb;
741: }
742: }
743: &Apache::blockedaccess::setup_handler($r);
744: return OK;
745: }
746: } elsif ($check_access) {
747: if ($handle eq '') {
748: unless ($access eq 'F') {
749: if ($requrl =~ m{^/res/$match_domain/$match_username/}) {
750: $r->log_reason("Cookie not valid", $r->filename);
751: }
752: }
753: }
754: if ($access eq '1') {
755: $env{'user.error.msg'}="$requrl:bre:0:0:Choose Course";
756: return HTTP_NOT_ACCEPTABLE;
757: }
758: if ($access eq 'A') {
759: &Apache::restrictedaccess::setup_handler($r);
760: return OK;
761: }
762: if ($access eq 'B') {
763: if ($poss_symb) {
764: if (&Apache::lonnet::symbverify($poss_symb,$requrl)) {
765: $env{'request.symb'} = $poss_symb;
766: }
767: }
768: &Apache::blockedaccess::setup_handler($r);
769: return OK;
770: }
771: if ($access eq 'D') {
772: &Apache::lonprotected::setup_handler($r);
773: return OK;
774: }
775: if (($access ne '2') && ($access ne 'F')) {
776: if ($requrl =~ m{^/res/}) {
777: $access = &Apache::lonnet::allowed('bro',$requrl);
778: if ($access ne 'F') {
779: if ($requrl eq '/res/lib/templates/simpleproblem.problem/smpedit') {
780: $access = &Apache::lonnet::allowed('bre','/res/lib/templates/simpleproblem.problem');
781: if ($access ne 'F') {
782: $env{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
783: return HTTP_NOT_ACCEPTABLE;
784: }
785: } else {
786: $env{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
787: return HTTP_NOT_ACCEPTABLE;
788: }
789: }
790: } elsif (($handle =~ /^publicuser_\d+$/) && (&Apache::lonnet::is_portfolio_url($requrl))) {
791: my $clientip = &Apache::lonnet::get_requestor_ip($r);
792: if (&Apache::lonnet::allowed('bre',$requrl,undef,undef,$clientip) ne 'F') {
793: $env{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
794: return HTTP_NOT_ACCEPTABLE;
795: }
796: } else {
797: $env{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
798: return HTTP_NOT_ACCEPTABLE;
799: }
800: }
801: }
802: if ($requrl =~ m|^/prtspool/|) {
803: my $start='/prtspool/'.$env{'user.name'}.'_'.
804: $env{'user.domain'};
805: if ($requrl !~ /^\Q$start\E/) {
806: $env{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
807: return HTTP_NOT_ACCEPTABLE;
808: }
809: }
810: if ($requrl =~ m|^/zipspool/|) {
811: my $start='/zipspool/zipout/'.$env{'user.name'}.":".
812: $env{'user.domain'};
813: if ($requrl !~ /^\Q$start\E/) {
814: $env{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
815: return HTTP_NOT_ACCEPTABLE;
816: }
817: }
818: if ($env{'user.name'} eq 'public' &&
819: $env{'user.domain'} eq 'public' &&
820: $requrl !~ m{^/+(res|public|uploaded)/} &&
821: $requrl !~ m{^/adm/[^/]+/[^/]+/aboutme/portfolio$ }x &&
822: $requrl !~ m{^/adm/blockingstatus/.*$} &&
823: $requrl !~ m{^/+adm/(help|logout|restrictedaccess|randomlabel\.png)}) {
824: $env{'request.querystring'}=$r->args;
825: $env{'request.firsturl'}=$requrl;
826: return FORBIDDEN;
827: }
828: # ------------------------------------------------------------- This is allowed
829: if ($env{'request.course.id'}) {
830: &Apache::lonnet::countacc($requrl);
831: my $query=$r->args;
832: if ($check_symb) {
833: # ------------------------------------- This is serious stuff, get symb and log
834: my $symb;
835: if ($query) {
836: &Apache::loncommon::get_unprocessed_cgi($query,['symb','folderpath']);
837: }
838: if ($env{'form.symb'}) {
839: $symb=&Apache::lonnet::symbclean($env{'form.symb'});
840: if (($requrl eq '/adm/navmaps') ||
841: ($requrl =~ m{^/adm/wrapper/}) ||
842: ($requrl =~ m{^/adm/coursedocs/showdoc/})) {
843: unless (&Apache::lonnet::symbverify($symb,$requrl)) {
844: if (&Apache::lonnet::is_on_map($requrl)) {
845: $symb = &Apache::lonnet::symbread($requrl);
846: unless (&Apache::lonnet::symbverify($symb,$requrl)) {
847: undef($symb);
848: }
849: }
850: }
851: if ($symb) {
852: if ($requrl eq '/adm/navmaps') {
853: my ($map,$mid,$murl)=&Apache::lonnet::decode_symb($symb);
854: &Apache::lonnet::symblist($map,$murl => [$murl,$mid]);
855: } elsif (($requrl =~ m{^/adm/wrapper/}) ||
856: ($requrl =~ m{^/adm/coursedocs/showdoc/})) {
857: my ($map,$mid,$murl)=&Apache::lonnet::decode_symb($symb);
858: if ($map =~ /\.page$/) {
859: my $mapsymb = &Apache::lonnet::symbread($map);
860: ($map,$mid,$murl)=&Apache::lonnet::decode_symb($mapsymb);
861: }
862: &Apache::lonnet::symblist($map,$murl => [$murl,$mid],
863: 'last_known' =>[$murl,$mid]);
864: }
865: }
866: } elsif ((&Apache::lonnet::symbverify($symb,$requrl)) ||
867: (($requrl=~m|(.*)/smpedit$|) &&
868: &Apache::lonnet::symbverify($symb,$1)) ||
869: (($requrl=~m|(.*/aboutme)/portfolio$|) &&
870: &Apache::lonnet::symbverify($symb,$1))) {
871: my ($map,$mid,$murl)=&Apache::lonnet::decode_symb($symb);
872: if (($map =~ /\.page$/) && ($requrl !~ /\.page$/)) {
873: my $mapsymb = &Apache::lonnet::symbread($map);
874: ($map,$mid,$murl)=&Apache::lonnet::decode_symb($mapsymb);
875: }
876: &Apache::lonnet::symblist($map,$murl => [$murl,$mid],
877: 'last_known' =>[$murl,$mid]);
878: } else {
879: $r->log_reason('Invalid symb for '.$requrl.': '.
880: $symb);
881: $env{'user.error.msg'}=
882: "$requrl:bre:1:1:Invalid Access";
883: return HTTP_NOT_ACCEPTABLE;
884: }
885: } else {
886: if ($requrl=~m{^(/adm/.*/aboutme)/portfolio$}) {
887: $requrl = $1;
888: }
889: $symb=&Apache::lonnet::symbread($requrl);
890: if (&Apache::lonnet::is_on_map($requrl) && $symb) {
891: my ($encstate,$invalidsymb);
892: unless (&Apache::lonnet::symbverify($symb,$requrl,\$encstate)) {
893: $invalidsymb = 1;
894: #
895: # If $env{'request.enc'} inconsistent with encryption expected for $symb
896: # retrieved by lonnet::symbread(), call again to check for an instance of
897: # $requrl in the course for which expected encryption matches request.enc.
898: # If symb for different instance passes lonnet::symbverify(), use that as
899: # the symb for $requrl and call &Apache::lonnet::allowed() for that symb.
900: # Report invalid symb if there is no other symb. Redirect to /adm/ambiguous
901: # if multiple possible symbs consistent with request.enc available for $requrl.
902: #
903: if (($env{'request.enc'} && !$encstate) || (!$env{'request.enc'} && $encstate)) {
904: my %possibles;
905: my $nocache = 1;
906: my $oldsymb = $symb;
907: $symb = &Apache::lonnet::symbread($requrl,'','','',\%possibles,$nocache);
908: if (($symb) && ($symb ne $oldsymb)) {
909: if (&Apache::lonnet::symbverify($symb,$requrl)) {
910: my $access=&Apache::lonnet::allowed('bre',$requrl,$symb);
911: if ($access eq 'B') {
912: $env{'request.symb'} = $symb;
913: &Apache::blockedaccess::setup_handler($r);
914: return OK;
915: } elsif (($access eq '2') || ($access eq 'F')) {
916: $invalidsymb = '';
917: }
918: }
919: } elsif (keys(%possibles) > 1) {
920: $r->internal_redirect('/adm/ambiguous');
921: return OK;
922: }
923: }
924: if ($invalidsymb) {
925: if ($requrl eq '/adm/navmaps') {
926: undef($symb);
927: } else {
928: $r->log_reason('Invalid symb for '.$requrl.': '.$symb);
929: $env{'user.error.msg'}=
930: "$requrl:bre:1:1:Invalid Access";
931: return HTTP_NOT_ACCEPTABLE;
932: }
933: }
934: }
935: }
936: if ($symb) {
937: my ($map,$mid,$murl)=
938: &Apache::lonnet::decode_symb($symb);
939: if ($requrl eq '/adm/navmaps') {
940: &Apache::lonnet::symblist($map,$murl =>[$murl,$mid]);
941: } else {
942: if (($map =~ /\.page$/) && ($requrl !~ /\.page$/)) {
943: my $mapsymb = &Apache::lonnet::symbread($map);
944: ($map,$mid,$murl)=&Apache::lonnet::decode_symb($mapsymb);
945: }
946: &Apache::lonnet::symblist($map,$murl =>[$murl,$mid],
947: 'last_known' =>[$murl,$mid]);
948: }
949: }
950: }
951: $env{'request.symb'}=$symb;
952: if (($env{'request.symbread.cached.'}) && ($env{'request.symbread.cached.'} ne $symb)) {
953: $env{'request.symbread.cached.'} = $symb;
954: }
955: &Apache::lonnet::courseacclog($symb);
956: } else {
957: # ------------------------------------------------------- This is other content
958: &Apache::lonnet::courseacclog($requrl);
959: }
960: if ($requrl =~ m{^/+uploaded/\Q$cdom\E/\Q$cnum\E/(docs|supplemental)/.+\.html?$}) {
961: if (&Apache::lonnet::allowed('mdc',$env{'request.course.id'})) {
962: if ($query) {
963: &Apache::loncommon::get_unprocessed_cgi($query,['forceedit']);
964: if ($env{'form.forceedit'}) {
965: $env{'request.state'} = 'edit';
966: }
967: }
968: }
969: } elsif ($requrl =~ m{^/+uploaded/\Q$cdom\E/\Q$cnum\E/portfolio/syllabus/.+\.html?$}) {
970: if (&Apache::lonnet::allowed('mdc',$env{'request.course.id'})) {
971: if ($query) {
972: &Apache::loncommon::get_unprocessed_cgi($query,['forceedit','editmode']);
973: if (($env{'form.forceedit'}) || ($env{'form.editmode'})) {
974: $env{'request.state'} = 'edit';
975: }
976: }
977: }
978: }
979: }
980: return OK;
981: } else {
982: my $defdom=$r->dir_config('lonDefDomain');
983: ($is_balancer,$otherserver) =
984: &Apache::lonnet::check_loadbalancing(undef,$defdom);
985: if ($is_balancer) {
986: $r->set_handlers('PerlResponseHandler'=>
987: [\&Apache::switchserver::handler]);
988: if ($otherserver ne '') {
989: $env{'form.otherserver'} = $otherserver;
990: }
991: }
992: }
993: # -------------------------------------------- See if this is a public resource
994: if ($requrl=~m|^/+adm/+help/+|) {
995: return OK;
996: }
997: # ------------------------------------ See if this is a viewable portfolio file
998: if (&Apache::lonnet::is_portfolio_url($requrl)) {
999: my $clientip = &Apache::lonnet::get_requestor_ip($r);
1000: my $access=&Apache::lonnet::allowed('bre',$requrl,undef,undef,$clientip);
1001: if ($access eq 'A') {
1002: &Apache::restrictedaccess::setup_handler($r);
1003: return OK;
1004: }
1005: if (($access ne '2') && ($access ne 'F')) {
1006: $env{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
1007: return HTTP_NOT_ACCEPTABLE;
1008: }
1009: }
1010:
1011: # -------------------------------------------------------------- Not authorized
1012: $requrl=~/\.(\w+)$/;
1013: # if ((&Apache::loncommon::fileembstyle($1) eq 'ssi') ||
1014: # ($requrl=~/^\/adm\/(roles|logout|email|menu|remote)/) ||
1015: # ($requrl=~m|^/prtspool/|)) {
1016: # -------------------------- Store where they wanted to go and get login screen
1017: $env{'request.querystring'}=$r->args;
1018: $env{'request.firsturl'}=$requrl;
1019: return FORBIDDEN;
1020: # } else {
1021: # --------------------------------------------------------------------- Goodbye
1022: # return HTTP_BAD_REQUEST;
1023: # }
1024: }
1025:
1026: 1;
1027: __END__
1028:
1029: =pod
1030:
1031: =back
1032:
1033: =cut
1034:
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