1: # The LearningOnline Network
2: # Cookie Based Access Handler
3: #
4: # $Id: lonacc.pm,v 1.194 2021/08/16 15:25:44 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: &Apache::lonnet::appenv({'request.deeplink.login' => $r->uri});
392: if ($linkprot) {
393: &Apache::lonnet::appenv({'request.linkprot' => $linkprot});
394: } elsif ($linkkey ne '') {
395: &Apache::lonnet::appenv({'request.linkkey' => $linkkey});
396: }
397: }
398: $env{'request.sso.login'} = 1;
399: if (defined($r->dir_config("lonSSOReloginServer"))) {
400: $env{'request.sso.reloginserver'} =
401: $r->dir_config('lonSSOReloginServer');
402: }
403: my $redirecturl = '/adm/switchserver';
404: if ($otherserver ne '') {
405: $redirecturl .= '?otherserver='.$otherserver;
406: }
407: $r->internal_redirect($redirecturl);
408: $r->set_handlers('PerlHandler'=> undef);
409: } else {
410: # need to login them in, so generate the need data that
411: # migrate expects to do login
412: my $ip = &Apache::lonnet::get_requestor_ip($r);
413: my %info=('ip' => $ip,
414: 'domain' => $domain,
415: 'username' => $user,
416: 'server' => $r->dir_config('lonHostID'),
417: 'sso.login' => 1
418: );
419: foreach my $item ('role','symb','iptoken','origurl') {
420: if (exists($form{$item})) {
421: $info{$item} = $form{$item};
422: }
423: }
424: unless (($info{'symb'}) || ($info{'origurl'})) {
425: unless (($r->uri eq '/adm/roles') || ($r->uri eq '/adm/sso')) {
426: $info{'origurl'} = $r->uri;
427: }
428: }
429: if (($r->uri eq '/adm/sso') && ($form{'origurl'} =~ m{^/+tiny/+$match_domain/+\w+$})) {
430: $info{'deeplink.login'} = $form{'origurl'};
431: } elsif ($r->uri =~ m{^/+tiny/+$match_domain/+\w+$}) {
432: $info{'deeplink.login'} = $r->uri;
433: }
434: if ($info{'deeplink.login'}) {
435: if ($linkprot) {
436: $info{'linkprot'} = $linkprot;
437: } elsif ($linkkey ne '') {
438: $info{'linkkey'} = $linkkey;
439: }
440: }
441: if ($r->dir_config("ssodirecturl") == 1) {
442: $info{'origurl'} = $r->uri;
443: }
444: if (defined($r->dir_config("lonSSOReloginServer"))) {
445: $info{'sso.reloginserver'} =
446: $r->dir_config('lonSSOReloginServer');
447: }
448: if (($is_balancer) && ($hosthere)) {
449: $info{'noloadbalance'} = $hosthere;
450: }
451: my $token =
452: &Apache::lonnet::tmpput(\%info,
453: $r->dir_config('lonHostID'));
454: $env{'form.token'} = $token;
455: $r->internal_redirect('/adm/migrateuser');
456: $r->set_handlers('PerlHandler'=> undef);
457: }
458: return OK;
459: } else {
460: &Apache::lonnet::logthis(" SSO authorized unknown user $user ");
461: my @cancreate;
462: my %domconfig =
463: &Apache::lonnet::get_dom('configuration',['usercreation'],$domain);
464: if (ref($domconfig{'usercreation'}) eq 'HASH') {
465: if (ref($domconfig{'usercreation'}{'cancreate'}) eq 'HASH') {
466: if (ref($domconfig{'usercreation'}{'cancreate'}{'selfcreate'}) eq 'ARRAY') {
467: @cancreate = @{$domconfig{'usercreation'}{'cancreate'}{'selfcreate'}};
468: } elsif (($domconfig{'usercreation'}{'cancreate'}{'selfcreate'} ne 'none') &&
469: ($domconfig{'usercreation'}{'cancreate'}{'selfcreate'} ne '')) {
470: @cancreate = ($domconfig{'usercreation'}{'cancreate'}{'selfcreate'});
471: }
472: }
473: }
474: if ((grep(/^sso$/,@cancreate)) || (defined($r->dir_config('lonSSOUserUnknownRedirect')))) {
475: $r->subprocess_env->set('SSOUserUnknown' => $user);
476: $r->subprocess_env->set('SSOUserDomain' => $domain);
477: if (grep(/^sso$/,@cancreate)) {
478: $r->set_handlers('PerlHandler'=> [\&Apache::createaccount::handler]);
479: $r->handler('perl-script');
480: } else {
481: $r->internal_redirect($r->dir_config('lonSSOUserUnknownRedirect'));
482: $r->set_handlers('PerlHandler'=> undef);
483: }
484: return OK;
485: }
486: }
487: return undef;
488: }
489:
490: sub handler {
491: my $r = shift;
492: my $requrl=$r->uri;
493:
494: if ($requrl =~ m{^/res/adm/pages/[^/]+\.(gif|png)$}) {
495: return OK;
496: }
497:
498: if (&Apache::lonnet::is_domainimage($requrl)) {
499: return OK;
500: }
501:
502: my %user;
503: my $handle = &Apache::lonnet::check_for_valid_session($r,undef,\%user);
504:
505: unless (($requrl eq '/adm/switchserver') && (!$r->is_initial_req())) {
506: my $result = &sso_login($r,$handle,$user{'name'});
507: if (defined($result)) {
508: return $result;
509: }
510: }
511:
512: my ($is_balancer,$otherserver);
513:
514: if ($handle eq '') {
515: unless ((($requrl eq '/adm/switchserver') && (!$r->is_initial_req())) ||
516: ($requrl =~ m{^/public/$match_domain/$match_courseid/syllabus}) ||
517: ($requrl =~ m{^/adm/help/}) ||
518: ($requrl =~ m{^/res/$match_domain/$match_username/})) {
519: $r->log_reason("Cookie not valid", $r->filename);
520: }
521: } elsif ($handle ne '') {
522:
523: # ------------------------------------------------------ Initialize Environment
524: my $lonidsdir=$r->dir_config('lonIDsDir');
525: &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);
526:
527: # --------------------------------------------------------- Initialize Language
528:
529: &Apache::lonlocal::get_language_handle($r);
530:
531: }
532:
533: # -------------------------------------------------- Should be a valid user now
534: if ($env{'user.name'} ne '' && $env{'user.domain'} ne '') {
535: # -------------------------------------------------------------- Resource State
536:
537: my ($cdom,$cnum);
538: if ($env{'request.course.id'}) {
539: $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
540: $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
541: }
542: if ($requrl=~/^\/+(res|uploaded)\//) {
543: $env{'request.state'} = "published";
544: } else {
545: $env{'request.state'} = 'unknown';
546: }
547: $env{'request.filename'} = $r->filename;
548: $env{'request.noversionuri'} = &Apache::lonnet::deversion($requrl);
549: my ($suppext,$checkabsolute);
550: if ($requrl =~ m{^/adm/wrapper/ext/}) {
551: my $query = $r->args;
552: if ($query) {
553: my $preserved;
554: foreach my $pair (split(/&/,$query)) {
555: my ($name, $value) = split(/=/,$pair);
556: unless (($name eq 'symb') || ($name eq 'usehttp')) {
557: $preserved .= $pair.'&';
558: }
559: if (($env{'request.course.id'}) && ($name eq 'folderpath')) {
560: if ($value =~ /^supplemental/) {
561: $suppext = 1;
562: }
563: }
564: }
565: $preserved =~ s/\&$//;
566: if ($preserved) {
567: $env{'request.external.querystring'} = $preserved;
568: }
569: }
570: if ($env{'request.course.id'}) {
571: $checkabsolute = 1;
572: }
573: } elsif ($env{'request.course.id'} &&
574: (($requrl =~ m{^/adm/$match_domain/$match_username/aboutme$}) ||
575: ($requrl eq "/public/$cdom/$cnum/syllabus") ||
576: ($requrl =~ m{^/adm/$cdom/$cnum/\d+/ext\.tool$}))) {
577: my $query = $r->args;
578: if ($query) {
579: foreach my $pair (split(/&/,$query)) {
580: my ($name, $value) = split(/=/,$pair);
581: if ($name eq 'folderpath') {
582: if ($value =~ /^supplemental/) {
583: $suppext = 1;
584: }
585: last;
586: }
587: }
588: }
589: if ($requrl =~ m{^/public/$cdom/$cnum/syllabus$}) {
590: $checkabsolute = 1;
591: }
592: }
593: if ($checkabsolute) {
594: my $hostname = $r->hostname();
595: my $lonhost = &Apache::lonnet::host_from_dns($hostname);
596: if ($lonhost) {
597: my $actual = &Apache::lonnet::absolute_url($hostname,1,1);
598: my $exphostname = &Apache::lonnet::hostname($lonhost);
599: my $expected = $Apache::lonnet::protocol{$lonhost}.'://'.$hostname;
600: unless ($actual eq $expected) {
601: $env{'request.use_absolute'} = $expected;
602: }
603: }
604: }
605: # -------------------------------------------------------- Load POST parameters
606:
607: &Apache::lonacc::get_posted_cgi($r);
608:
609: # ------------------------------------------------------ Check if load balancer
610:
611: my $checkexempt;
612: if ($env{'user.loadbalexempt'} eq $r->dir_config('lonHostID')) {
613: if ($env{'user.loadbalcheck.time'} + 600 > time) {
614: $checkexempt = 1;
615: }
616: }
617: if ($env{'user.noloadbalance'} eq $r->dir_config('lonHostID')) {
618: $checkexempt = 1;
619: }
620: unless (($checkexempt) || (($requrl eq '/adm/switchserver') && (!$r->is_initial_req()))) {
621: ($is_balancer,$otherserver) =
622: &Apache::lonnet::check_loadbalancing($env{'user.name'},
623: $env{'user.domain'});
624: if ($is_balancer) {
625: # Check if browser sent a LON-CAPA load balancer cookie (and this is a balancer)
626: my ($found_server,$balancer_cookie) = &Apache::lonnet::check_for_balancer_cookie($r);
627: if (($found_server) && ($balancer_cookie =~ /^\Q$env{'user.domain'}\E_\Q$env{'user.name'}\E_/)) {
628: $otherserver = $found_server;
629: }
630: unless ($requrl eq '/adm/switchserver') {
631: $r->set_handlers('PerlResponseHandler'=>
632: [\&Apache::switchserver::handler]);
633: }
634: if ($otherserver ne '') {
635: $env{'form.otherserver'} = $otherserver;
636: }
637: unless (($env{'form.origurl'}) || ($r->uri eq '/adm/roles') ||
638: ($r->uri eq '/adm/switchserver') || ($r->uri eq '/adm/sso')) {
639: $env{'form.origurl'} = $r->uri;
640: }
641: }
642: }
643: if ($requrl=~m{^/+tiny/+$match_domain/+\w+$}) {
644: if ($env{'user.name'} eq 'public' &&
645: $env{'user.domain'} eq 'public') {
646: $env{'request.firsturl'}=$requrl;
647: return FORBIDDEN;
648: } else {
649: return OK;
650: }
651: }
652: # ---------------------------------------------------------------- Check access
653: my $now = time;
654: my ($check_symb,$check_access,$check_block,$access,$poss_symb);
655: if ($requrl !~ m{^/(?:adm|public|(?:prt|zip)spool)/}
656: || $requrl =~ /^\/adm\/.*\/(smppg|bulletinboard)(\?|$ )/x) {
657: $check_access = 1;
658: }
659: if ((!$check_access) && ($env{'request.course.id'})) {
660: if (($requrl eq '/adm/viewclasslist') ||
661: ($requrl =~ m{^(/adm/wrapper|)\Q/uploaded/$cdom/$cnum/docs/\E}) ||
662: ($requrl =~ m{^/adm/.*/aboutme$}) ||
663: ($requrl=~m{^/adm/coursedocs/showdoc/}) ||
664: ($requrl=~m{^(/adm/wrapper|)/adm/$cdom/$cnum/\d+/ext\.tool$})) {
665: $check_block = 1;
666: }
667: }
668: if (($env{'request.course.id'}) && (!$suppext)) {
669: $requrl=~/\.(\w+)$/;
670: if ((&Apache::loncommon::fileembstyle($1) eq 'ssi') ||
671: ($requrl=~/^\/adm\/.*\/(aboutme|smppg|bulletinboard)(\?|$ )/x) ||
672: ($requrl=~/^\/adm\/wrapper\//) ||
673: ($requrl=~m|^/adm/coursedocs/showdoc/|) ||
674: ($requrl=~m|\.problem/smpedit$|) ||
675: ($requrl=~/^\/public\/.*\/syllabus$/) ||
676: ($requrl=~/^\/adm\/(viewclasslist|navmaps)$/) ||
677: ($requrl=~/^\/adm\/.*\/aboutme\/portfolio(\?|$)/) ||
678: ($requrl=~m{^/adm/$cdom/$cnum/\d+/ext\.tool$})) {
679: $check_symb = 1;
680: }
681: }
682: if (($check_access) || ($check_block)) {
683: if ($check_symb) {
684: if ($env{'form.symb'}) {
685: $poss_symb=&Apache::lonnet::symbclean($env{'form.symb'});
686: } elsif (($env{'request.course.id'}) && ($r->args ne '')) {
687: my $query = $r->args;
688: foreach my $pair (split(/&/,$query)) {
689: my ($name, $value) = split(/=/,$pair);
690: $name = &unescape($name);
691: $value =~ tr/+/ /;
692: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
693: if ($name eq 'symb') {
694: $poss_symb = &Apache::lonnet::symbclean($value);
695: last;
696: }
697: }
698: }
699: if ($poss_symb) {
700: my ($possmap,$resid,$url)=&Apache::lonnet::decode_symb($poss_symb);
701: $url = &Apache::lonnet::clutter($url);
702: my $toplevelmap = $env{'course.'.$env{'request.course.id'}.'.url'};
703: unless (($url eq $requrl) && (($possmap eq $toplevelmap) ||
704: (&Apache::lonnet::is_on_map($possmap)))) {
705: undef($poss_symb);
706: }
707: if ($poss_symb) {
708: if ((!$env{'request.role.adv'}) && ($env{'acc.randomout'}) &&
709: ($env{'acc.randomout'}=~/\&\Q$poss_symb\E\&/)) {
710: undef($poss_symb);
711: } elsif ((!$env{'request.role.adv'}) && ($env{'acc.deeplinkout'}) &&
712: ($env{'acc.deeplinkout'}=~/\&\Q$poss_symb\E\&/)) {
713: undef($poss_symb);
714: }
715: }
716: }
717: if ($poss_symb) {
718: $access=&Apache::lonnet::allowed('bre',$requrl,$poss_symb);
719: } else {
720: $access=&Apache::lonnet::allowed('bre',$requrl,'','','','',1);
721: }
722: } else {
723: my $nodeeplinkcheck;
724: if (($check_access) && ($requrl =~ /\.(sequence|page)$/)) {
725: unless ($env{'form.navmap'}) {
726: if ($r->args ne '') {
727: &Apache::loncommon::get_unprocessed_cgi($r->args,['navmap']);
728: unless ($env{'form.navmap'}) {
729: $nodeeplinkcheck = 1;
730: }
731: }
732: }
733: }
734: $access=&Apache::lonnet::allowed('bre',$requrl,'','','','','',$nodeeplinkcheck);
735: }
736: }
737: if ($check_block) {
738: if ($access eq 'B') {
739: if ($poss_symb) {
740: if (&Apache::lonnet::symbverify($poss_symb,$requrl)) {
741: $env{'request.symb'} = $poss_symb;
742: }
743: }
744: &Apache::blockedaccess::setup_handler($r);
745: return OK;
746: }
747: } elsif ($check_access) {
748: if ($handle eq '') {
749: unless ($access eq 'F') {
750: if ($requrl =~ m{^/res/$match_domain/$match_username/}) {
751: $r->log_reason("Cookie not valid", $r->filename);
752: }
753: }
754: }
755: if ($access eq '1') {
756: $env{'user.error.msg'}="$requrl:bre:0:0:Choose Course";
757: return HTTP_NOT_ACCEPTABLE;
758: }
759: if ($access eq 'A') {
760: &Apache::restrictedaccess::setup_handler($r);
761: return OK;
762: }
763: if ($access eq 'B') {
764: if ($poss_symb) {
765: if (&Apache::lonnet::symbverify($poss_symb,$requrl)) {
766: $env{'request.symb'} = $poss_symb;
767: }
768: }
769: &Apache::blockedaccess::setup_handler($r);
770: return OK;
771: }
772: if ($access eq 'D') {
773: &Apache::lonprotected::setup_handler($r);
774: return OK;
775: }
776: if (($access ne '2') && ($access ne 'F')) {
777: if ($requrl =~ m{^/res/}) {
778: $access = &Apache::lonnet::allowed('bro',$requrl);
779: if ($access ne 'F') {
780: if ($requrl eq '/res/lib/templates/simpleproblem.problem/smpedit') {
781: $access = &Apache::lonnet::allowed('bre','/res/lib/templates/simpleproblem.problem');
782: if ($access ne 'F') {
783: $env{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
784: return HTTP_NOT_ACCEPTABLE;
785: }
786: } else {
787: $env{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
788: return HTTP_NOT_ACCEPTABLE;
789: }
790: }
791: } elsif (($handle =~ /^publicuser_\d+$/) && (&Apache::lonnet::is_portfolio_url($requrl))) {
792: my $clientip = &Apache::lonnet::get_requestor_ip($r);
793: if (&Apache::lonnet::allowed('bre',$requrl,undef,undef,$clientip) ne 'F') {
794: $env{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
795: return HTTP_NOT_ACCEPTABLE;
796: }
797: } else {
798: $env{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
799: return HTTP_NOT_ACCEPTABLE;
800: }
801: }
802: }
803: if ($requrl =~ m|^/prtspool/|) {
804: my $start='/prtspool/'.$env{'user.name'}.'_'.
805: $env{'user.domain'};
806: if ($requrl !~ /^\Q$start\E/) {
807: $env{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
808: return HTTP_NOT_ACCEPTABLE;
809: }
810: }
811: if ($requrl =~ m|^/zipspool/|) {
812: my $start='/zipspool/zipout/'.$env{'user.name'}.":".
813: $env{'user.domain'};
814: if ($requrl !~ /^\Q$start\E/) {
815: $env{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
816: return HTTP_NOT_ACCEPTABLE;
817: }
818: }
819: if ($env{'user.name'} eq 'public' &&
820: $env{'user.domain'} eq 'public' &&
821: $requrl !~ m{^/+(res|public|uploaded)/} &&
822: $requrl !~ m{^/adm/[^/]+/[^/]+/aboutme/portfolio$ }x &&
823: $requrl !~ m{^/adm/blockingstatus/.*$} &&
824: $requrl !~ m{^/+adm/(help|logout|restrictedaccess|randomlabel\.png)}) {
825: $env{'request.querystring'}=$r->args;
826: $env{'request.firsturl'}=$requrl;
827: return FORBIDDEN;
828: }
829: # ------------------------------------------------------------- This is allowed
830: if ($env{'request.course.id'}) {
831: &Apache::lonnet::countacc($requrl);
832: my $query=$r->args;
833: if ($check_symb) {
834: # ------------------------------------- This is serious stuff, get symb and log
835: my $symb;
836: if ($query) {
837: &Apache::loncommon::get_unprocessed_cgi($query,['symb','folderpath']);
838: }
839: if ($env{'form.symb'}) {
840: $symb=&Apache::lonnet::symbclean($env{'form.symb'});
841: if (($requrl eq '/adm/navmaps') ||
842: ($requrl =~ m{^/adm/wrapper/}) ||
843: ($requrl =~ m{^/adm/coursedocs/showdoc/})) {
844: unless (&Apache::lonnet::symbverify($symb,$requrl)) {
845: if (&Apache::lonnet::is_on_map($requrl)) {
846: $symb = &Apache::lonnet::symbread($requrl);
847: unless (&Apache::lonnet::symbverify($symb,$requrl)) {
848: undef($symb);
849: }
850: }
851: }
852: if ($symb) {
853: if ($requrl eq '/adm/navmaps') {
854: my ($map,$mid,$murl)=&Apache::lonnet::decode_symb($symb);
855: &Apache::lonnet::symblist($map,$murl => [$murl,$mid]);
856: } elsif (($requrl =~ m{^/adm/wrapper/}) ||
857: ($requrl =~ m{^/adm/coursedocs/showdoc/})) {
858: my ($map,$mid,$murl)=&Apache::lonnet::decode_symb($symb);
859: if ($map =~ /\.page$/) {
860: my $mapsymb = &Apache::lonnet::symbread($map);
861: ($map,$mid,$murl)=&Apache::lonnet::decode_symb($mapsymb);
862: }
863: &Apache::lonnet::symblist($map,$murl => [$murl,$mid],
864: 'last_known' =>[$murl,$mid]);
865: }
866: }
867: } elsif ((&Apache::lonnet::symbverify($symb,$requrl)) ||
868: (($requrl=~m|(.*)/smpedit$|) &&
869: &Apache::lonnet::symbverify($symb,$1)) ||
870: (($requrl=~m|(.*/aboutme)/portfolio$|) &&
871: &Apache::lonnet::symbverify($symb,$1))) {
872: my ($map,$mid,$murl)=&Apache::lonnet::decode_symb($symb);
873: if (($map =~ /\.page$/) && ($requrl !~ /\.page$/)) {
874: my $mapsymb = &Apache::lonnet::symbread($map);
875: ($map,$mid,$murl)=&Apache::lonnet::decode_symb($mapsymb);
876: }
877: &Apache::lonnet::symblist($map,$murl => [$murl,$mid],
878: 'last_known' =>[$murl,$mid]);
879: } else {
880: $r->log_reason('Invalid symb for '.$requrl.': '.
881: $symb);
882: $env{'user.error.msg'}=
883: "$requrl:bre:1:1:Invalid Access";
884: return HTTP_NOT_ACCEPTABLE;
885: }
886: } else {
887: if ($requrl=~m{^(/adm/.*/aboutme)/portfolio$}) {
888: $requrl = $1;
889: }
890: $symb=&Apache::lonnet::symbread($requrl);
891: if (&Apache::lonnet::is_on_map($requrl) && $symb) {
892: my ($encstate,$invalidsymb);
893: unless (&Apache::lonnet::symbverify($symb,$requrl,\$encstate)) {
894: $invalidsymb = 1;
895: #
896: # If $env{'request.enc'} inconsistent with encryption expected for $symb
897: # retrieved by lonnet::symbread(), call again to check for an instance of
898: # $requrl in the course for which expected encryption matches request.enc.
899: # If symb for different instance passes lonnet::symbverify(), use that as
900: # the symb for $requrl and call &Apache::lonnet::allowed() for that symb.
901: # Report invalid symb if there is no other symb. Redirect to /adm/ambiguous
902: # if multiple possible symbs consistent with request.enc available for $requrl.
903: #
904: if (($env{'request.enc'} && !$encstate) || (!$env{'request.enc'} && $encstate)) {
905: my %possibles;
906: my $nocache = 1;
907: my $oldsymb = $symb;
908: $symb = &Apache::lonnet::symbread($requrl,'','','',\%possibles,$nocache);
909: if (($symb) && ($symb ne $oldsymb)) {
910: if (&Apache::lonnet::symbverify($symb,$requrl)) {
911: my $access=&Apache::lonnet::allowed('bre',$requrl,$symb);
912: if ($access eq 'B') {
913: $env{'request.symb'} = $symb;
914: &Apache::blockedaccess::setup_handler($r);
915: return OK;
916: } elsif (($access eq '2') || ($access eq 'F')) {
917: $invalidsymb = '';
918: }
919: }
920: } elsif (keys(%possibles) > 1) {
921: $r->internal_redirect('/adm/ambiguous');
922: return OK;
923: }
924: }
925: if ($invalidsymb) {
926: if ($requrl eq '/adm/navmaps') {
927: undef($symb);
928: } else {
929: $r->log_reason('Invalid symb for '.$requrl.': '.$symb);
930: $env{'user.error.msg'}=
931: "$requrl:bre:1:1:Invalid Access";
932: return HTTP_NOT_ACCEPTABLE;
933: }
934: }
935: }
936: }
937: if ($symb) {
938: my ($map,$mid,$murl)=
939: &Apache::lonnet::decode_symb($symb);
940: if ($requrl eq '/adm/navmaps') {
941: &Apache::lonnet::symblist($map,$murl =>[$murl,$mid]);
942: } else {
943: if (($map =~ /\.page$/) && ($requrl !~ /\.page$/)) {
944: my $mapsymb = &Apache::lonnet::symbread($map);
945: ($map,$mid,$murl)=&Apache::lonnet::decode_symb($mapsymb);
946: }
947: &Apache::lonnet::symblist($map,$murl =>[$murl,$mid],
948: 'last_known' =>[$murl,$mid]);
949: }
950: }
951: }
952: $env{'request.symb'}=$symb;
953: if (($env{'request.symbread.cached.'}) && ($env{'request.symbread.cached.'} ne $symb)) {
954: $env{'request.symbread.cached.'} = $symb;
955: }
956: &Apache::lonnet::courseacclog($symb);
957: } else {
958: # ------------------------------------------------------- This is other content
959: &Apache::lonnet::courseacclog($requrl);
960: }
961: if ($requrl =~ m{^/+uploaded/\Q$cdom\E/\Q$cnum\E/(docs|supplemental)/.+\.html?$}) {
962: if (&Apache::lonnet::allowed('mdc',$env{'request.course.id'})) {
963: if ($query) {
964: &Apache::loncommon::get_unprocessed_cgi($query,['forceedit']);
965: if ($env{'form.forceedit'}) {
966: $env{'request.state'} = 'edit';
967: }
968: }
969: }
970: } elsif ($requrl =~ m{^/+uploaded/\Q$cdom\E/\Q$cnum\E/portfolio/syllabus/.+\.html?$}) {
971: if (&Apache::lonnet::allowed('mdc',$env{'request.course.id'})) {
972: if ($query) {
973: &Apache::loncommon::get_unprocessed_cgi($query,['forceedit','editmode']);
974: if (($env{'form.forceedit'}) || ($env{'form.editmode'})) {
975: $env{'request.state'} = 'edit';
976: }
977: }
978: }
979: }
980: }
981: return OK;
982: } else {
983: my $defdom=$r->dir_config('lonDefDomain');
984: ($is_balancer,$otherserver) =
985: &Apache::lonnet::check_loadbalancing(undef,$defdom);
986: if ($is_balancer) {
987: $r->set_handlers('PerlResponseHandler'=>
988: [\&Apache::switchserver::handler]);
989: if ($otherserver ne '') {
990: $env{'form.otherserver'} = $otherserver;
991: }
992: }
993: }
994: # -------------------------------------------- See if this is a public resource
995: if ($requrl=~m|^/+adm/+help/+|) {
996: return OK;
997: }
998: # ------------------------------------ See if this is a viewable portfolio file
999: if (&Apache::lonnet::is_portfolio_url($requrl)) {
1000: my $clientip = &Apache::lonnet::get_requestor_ip($r);
1001: my $access=&Apache::lonnet::allowed('bre',$requrl,undef,undef,$clientip);
1002: if ($access eq 'A') {
1003: &Apache::restrictedaccess::setup_handler($r);
1004: return OK;
1005: }
1006: if (($access ne '2') && ($access ne 'F')) {
1007: $env{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
1008: return HTTP_NOT_ACCEPTABLE;
1009: }
1010: }
1011:
1012: # -------------------------------------------------------------- Not authorized
1013: $requrl=~/\.(\w+)$/;
1014: # if ((&Apache::loncommon::fileembstyle($1) eq 'ssi') ||
1015: # ($requrl=~/^\/adm\/(roles|logout|email|menu|remote)/) ||
1016: # ($requrl=~m|^/prtspool/|)) {
1017: # -------------------------- Store where they wanted to go and get login screen
1018: $env{'request.querystring'}=$r->args;
1019: $env{'request.firsturl'}=$requrl;
1020: return FORBIDDEN;
1021: # } else {
1022: # --------------------------------------------------------------------- Goodbye
1023: # return HTTP_BAD_REQUEST;
1024: # }
1025: }
1026:
1027: 1;
1028: __END__
1029:
1030: =pod
1031:
1032: =back
1033:
1034: =cut
1035:
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>
![[BACK]](/icons/back.gif){kind=icon}
Return to lonacc.pm CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [LON-CAPA] / loncom / auth