Annotation of loncom/auth/lonacc.pm, revision 1.124
1.1 albertel 1: # The LearningOnline Network
2: # Cookie Based Access Handler
1.22 www 3: #
1.124 ! raeburn 4: # $Id: lonacc.pm,v 1.123 2008/12/10 16:28:03 raeburn 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:
1.121 jms 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: =over
93:
94: =cut
95:
1.119 jms 96:
1.1 albertel 97: package Apache::lonacc;
98:
99: use strict;
1.8 www 100: use Apache::Constants qw(:common :http :methods);
1.2 www 101: use Apache::File;
1.6 www 102: use Apache::lonnet;
1.25 harris41 103: use Apache::loncommon();
1.47 www 104: use Apache::lonlocal;
1.86 albertel 105: use Apache::restrictedaccess();
1.103 raeburn 106: use Apache::blockedaccess();
1.16 www 107: use Fcntl qw(:flock);
1.85 raeburn 108: use LONCAPA;
1.1 albertel 109:
1.75 albertel 110: sub cleanup {
111: my ($r)=@_;
112: if (! $r->is_initial_req()) { return DECLINED; }
113: &Apache::lonnet::save_cache();
1.96 albertel 114: &Apache::lontexconvert::jsMath_reset();
1.75 albertel 115: return OK;
116: }
117:
118: sub goodbye {
119: my ($r)=@_;
120: &Apache::lonnet::goodbye();
121: return DONE;
122: }
123:
1.76 albertel 124: ###############################################
125:
126: sub get_posted_cgi {
1.114 raeburn 127: my ($r,$fields) = @_;
1.76 albertel 128:
129: my $buffer;
130: if ($r->header_in('Content-length')) {
131: $r->read($buffer,$r->header_in('Content-length'),0);
132: }
1.113 albertel 133: my $content_type = $r->header_in('Content-type');
134: if ($content_type !~ m{^multipart/form-data}) {
1.76 albertel 135: my @pairs=split(/&/,$buffer);
136: my $pair;
137: foreach $pair (@pairs) {
138: my ($name,$value) = split(/=/,$pair);
139: $value =~ tr/+/ /;
140: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
141: $name =~ tr/+/ /;
142: $name =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
1.114 raeburn 143: if (ref($fields) eq 'ARRAY') {
144: next if (!grep(/^\Q$name\E$/,@{$fields}));
145: }
1.77 albertel 146: &Apache::loncommon::add_to_env("form.$name",$value);
1.76 albertel 147: }
148: } else {
1.113 albertel 149: my ($contentsep) = ($content_type =~ /boundary=\"?([^\";,]+)\"?/);
1.76 albertel 150: my @lines = split (/\n/,$buffer);
151: my $name='';
152: my $value='';
153: my $fname='';
154: my $fmime='';
155: my $i;
156: for ($i=0;$i<=$#lines;$i++) {
1.113 albertel 157: if ($lines[$i]=~/^--\Q$contentsep\E/) {
1.76 albertel 158: if ($name) {
159: chomp($value);
1.114 raeburn 160: if (ref($fields) eq 'ARRAY') {
161: next if (!grep(/^\Q$name\E$/,@{$fields}));
162: }
1.118 raeburn 163: if ($fname) {
164: if ($env{'form.symb'} ne '') {
165: my $size = (length($value))/(1024.0 * 1024.0);
166: if (&upload_size_allowed($name,$size,$fname) eq 'ok') {
167: $env{"form.$name.filename"}=$fname;
168: $env{"form.$name.mimetype"}=$fmime;
169: &Apache::loncommon::add_to_env("form.$name",$value);
170: }
171: } else {
172: $env{"form.$name.filename"}=$fname;
173: $env{"form.$name.mimetype"}=$fmime;
174: &Apache::loncommon::add_to_env("form.$name",$value);
175: }
176: } else {
177: $value=~s/\s+$//s;
178: &Apache::loncommon::add_to_env("form.$name",$value);
179: }
1.76 albertel 180: }
181: if ($i<$#lines) {
182: $i++;
183: $lines[$i]=~
184: /Content\-Disposition\:\s*form\-data\;\s*name\=\"([^\"]+)\"/i;
185: $name=$1;
186: $value='';
187: if ($lines[$i]=~/filename\=\"([^\"]+)\"/i) {
188: $fname=$1;
189: if
190: ($lines[$i+1]=~/Content\-Type\:\s*([\w\-\/]+)/i) {
191: $fmime=$1;
192: $i++;
193: } else {
194: $fmime='';
195: }
196: } else {
197: $fname='';
198: $fmime='';
199: }
200: $i++;
201: }
202: } else {
203: $value.=$lines[$i]."\n";
204: }
205: }
206: }
207: #
208: # Digested POSTed values
209: #
210: # Remember the way this was originally done (GET or POST)
211: #
212: $env{'request.method'}=$ENV{'REQUEST_METHOD'};
213: #
214: # There may also be stuff in the query string
215: # Tell subsequent handlers that this was GET, not POST, so they can access query string.
216: # Also, unset POSTed content length to cover all tracks.
217: #
218:
219: $r->method_number(M_GET);
220:
221: $r->method('GET');
222: $r->headers_in->unset('Content-length');
223: }
224:
1.121 jms 225: =pod
226:
227: =item upload_size_allowed()
228:
229: Perform size checks for file uploads to essayresponse items in course context.
230:
231: Add form.HWFILESIZE.$part_$id to %env with file size (MB)
232: If file exceeds maximum allowed size, add form.HWFILETOOBIG.$part_$id to %env.
233:
234: =cut
1.118 raeburn 235:
236: sub upload_size_allowed {
237: my ($name,$size,$fname) = @_;
238: if ($name =~ /^HWFILE(\w+)$/) {
239: my $ident = $1;
240: my $item = 'HWFILESIZE'.$ident;
1.122 raeburn 241: my $savesize = sprintf("%.6f",$size);
242: &Apache::loncommon::add_to_env("form.$item",$savesize);
1.118 raeburn 243: my $maxsize= &Apache::lonnet::EXT("resource.$ident.maxfilesize");
244: if (!$maxsize) {
1.123 raeburn 245: $maxsize = 10.0; # FIXME This should become a domain configuration.
1.118 raeburn 246: }
247: if ($size > $maxsize) {
248: my $warn = 'HWFILETOOBIG'.$ident;
249: &Apache::loncommon::add_to_env("form.$warn",$fname);
250: return;
251: }
252: }
253: return 'ok';
254: }
255:
1.121 jms 256: =pod
257:
258: =item sso_login()
259:
260: handle the case of the single sign on user, at this point $r->user
261: will be set and valid now need to find the loncapa user info and possibly
262: balance them
263: returns OK if it was a SSO and user was handled
264: undef if not SSO or no means to hanle the user
265:
266: =cut
1.117 jms 267:
1.94 albertel 268: sub sso_login {
1.111 albertel 269: my ($r,$handle) = @_;
1.94 albertel 270:
271: my $lonidsdir=$r->dir_config('lonIDsDir');
272: if (!($r->user
273: && (!defined($env{'user.name'}) && !defined($env{'user.domain'}))
1.111 albertel 274: && ($handle eq ''))) {
1.94 albertel 275: # not an SSO case or already logged in
276: return undef;
277: }
278:
1.97 albertel 279: my ($user) = ($r->user =~ m/([a-zA-Z0-9_\-@.]*)/);
280:
1.94 albertel 281: my $domain = $r->dir_config('lonDefDomain');
1.97 albertel 282: my $home=&Apache::lonnet::homeserver($user,$domain);
1.94 albertel 283: if ($home !~ /(con_lost|no_host|no_such_host)/) {
1.107 albertel 284: &Apache::lonnet::logthis(" SSO authorized user $user ");
1.94 albertel 285: if ($r->dir_config("lonBalancer") eq 'yes') {
286: # login but immeaditly go to switch server to find us a new
287: # machine
1.97 albertel 288: &Apache::lonauth::success($r,$user,$domain,$home,'noredirect');
1.105 raeburn 289: $env{'request.sso.login'} = 1;
1.106 raeburn 290: if (defined($r->dir_config("lonSSOReloginServer"))) {
291: $env{'request.sso.reloginserver'} =
292: $r->dir_config('lonSSOReloginServer');
293: }
1.94 albertel 294: $r->internal_redirect('/adm/switchserver');
1.101 albertel 295: $r->set_handlers('PerlHandler'=> undef);
1.94 albertel 296: } else {
297: # need to login them in, so generate the need data that
298: # migrate expects to do login
299: my %info=('ip' => $r->connection->remote_ip(),
300: 'domain' => $domain,
1.97 albertel 301: 'username' => $user,
1.94 albertel 302: 'server' => $r->dir_config('lonHostID'),
303: 'sso.login' => 1
304: );
1.116 raeburn 305: if ($r->dir_config("ssodirecturl") == 1) {
306: $info{'origurl'} = $r->uri;
307: }
1.106 raeburn 308: if (defined($r->dir_config("lonSSOReloginServer"))) {
309: $info{'sso.reloginserver'} =
310: $r->dir_config('lonSSOReloginServer');
311: }
1.94 albertel 312: my $token =
313: &Apache::lonnet::tmpput(\%info,
314: $r->dir_config('lonHostID'));
315: $env{'form.token'} = $token;
316: $r->internal_redirect('/adm/migrateuser');
1.101 albertel 317: $r->set_handlers('PerlHandler'=> undef);
1.94 albertel 318: }
319: return OK;
1.98 albertel 320: } elsif (defined($r->dir_config('lonSSOUserUnknownRedirect'))) {
1.107 albertel 321: &Apache::lonnet::logthis(" SSO authorized unknown user $user ");
1.104 raeburn 322: $r->subprocess_env->set('SSOUserUnknown' => $user);
323: $r->subprocess_env->set('SSOUserDomain' => $domain);
1.115 raeburn 324: my @cancreate;
325: my %domconfig =
326: &Apache::lonnet::get_dom('configuration',['usercreation'],$domain);
327: if (ref($domconfig{'usercreation'}) eq 'HASH') {
328: if (ref($domconfig{'usercreation'}{'cancreate'}) eq 'HASH') {
329: if (ref($domconfig{'usercreation'}{'cancreate'}{'selfcreate'}) eq 'ARRAY') {
330: @cancreate = @{$domconfig{'usercreation'}{'cancreate'}{'selfcreate'}};
331: } elsif (($domconfig{'usercreation'}{'cancreate'}{'selfcreate'} ne 'none') &&
332: ($domconfig{'usercreation'}{'cancreate'}{'selfcreate'} ne '')) {
333: @cancreate = ($domconfig{'usercreation'}{'cancreate'}{'selfcreate'});
334: }
335: }
336: }
337: if (grep(/^sso$/,@cancreate)) {
338: $r->internal_redirect('/adm/createaccount');
339: } else {
340: $r->internal_redirect($r->dir_config('lonSSOUserUnknownRedirect'));
341: }
1.101 albertel 342: $r->set_handlers('PerlHandler'=> undef);
1.94 albertel 343: return OK;
344: }
345: return undef;
346: }
347:
1.1 albertel 348: sub handler {
349: my $r = shift;
350: my $requrl=$r->uri;
1.108 raeburn 351: if (&Apache::lonnet::is_domainimage($requrl)) {
352: return OK;
353: }
1.70 albertel 354:
1.124 ! raeburn 355: if ($requrl =~ m{^/res/adm/pages/[^/]+\.(gif|png)$}) {
! 356: return OK;
! 357: }
! 358:
1.111 albertel 359: my $handle = &Apache::lonnet::check_for_valid_session($r);
1.93 albertel 360:
1.111 albertel 361: my $result = &sso_login($r,$handle);
1.100 albertel 362: if (defined($result)) {
1.116 raeburn 363: return $result;
1.70 albertel 364: }
365:
1.94 albertel 366:
1.70 albertel 367: if ($r->dir_config("lonBalancer") eq 'yes') {
368: $r->set_handlers('PerlResponseHandler'=>
369: [\&Apache::switchserver::handler]);
370: }
1.92 albertel 371:
372: if ($handle eq '') {
373: $r->log_reason("Cookie $handle not valid", $r->filename);
1.111 albertel 374: } elsif ($handle ne '') {
1.6 www 375:
1.46 www 376: # ------------------------------------------------------ Initialize Environment
1.111 albertel 377: my $lonidsdir=$r->dir_config('lonIDsDir');
1.92 albertel 378: &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);
1.47 www 379:
380: # --------------------------------------------------------- Initialize Language
381:
1.92 albertel 382: &Apache::lonlocal::get_language_handle($r);
383:
384: }
1.46 www 385:
1.92 albertel 386: # -------------------------------------------------- Should be a valid user now
387: if ($env{'user.name'} ne '' && $env{'user.domain'} ne '') {
1.46 www 388: # -------------------------------------------------------------- Resource State
1.6 www 389:
1.92 albertel 390: if ($requrl=~/^\/+(res|uploaded)\//) {
391: $env{'request.state'} = "published";
392: } else {
393: $env{'request.state'} = 'unknown';
394: }
395: $env{'request.filename'} = $r->filename;
396: $env{'request.noversionuri'} = &Apache::lonnet::deversion($requrl);
1.6 www 397: # -------------------------------------------------------- Load POST parameters
398:
1.92 albertel 399: &Apache::lonacc::get_posted_cgi($r);
1.6 www 400:
401: # ---------------------------------------------------------------- Check access
1.92 albertel 402: my $now = time;
1.95 albertel 403: if ($requrl !~ m{^/(?:adm|public|prtspool)/}
404: || $requrl =~ /^\/adm\/.*\/(smppg|bulletinboard)(\?|$ )/x) {
1.92 albertel 405: my $access=&Apache::lonnet::allowed('bre',$requrl);
406: if ($access eq '1') {
407: $env{'user.error.msg'}="$requrl:bre:0:0:Choose Course";
408: return HTTP_NOT_ACCEPTABLE;
409: }
410: if ($access eq 'A') {
411: &Apache::restrictedaccess::setup_handler($r);
412: return OK;
413: }
1.103 raeburn 414: if ($access eq 'B') {
415: &Apache::blockedaccess::setup_handler($r);
416: return OK;
417: }
1.92 albertel 418: if (($access ne '2') && ($access ne 'F')) {
419: $env{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
420: return HTTP_NOT_ACCEPTABLE;
1.37 albertel 421: }
1.92 albertel 422: }
423: if ($requrl =~ m|^/prtspool/|) {
424: my $start='/prtspool/'.$env{'user.name'}.'_'.
425: $env{'user.domain'};
426: if ($requrl !~ /^\Q$start\E/) {
427: $env{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
428: return HTTP_NOT_ACCEPTABLE;
1.67 albertel 429: }
1.92 albertel 430: }
1.109 banghart 431: if ($requrl =~ m|^/zipspool/|) {
1.110 banghart 432: my $start='/zipspool/zipout/'.$env{'user.name'}.":".
1.109 banghart 433: $env{'user.domain'};
434: if ($requrl !~ /^\Q$start\E/) {
435: $env{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
436: return HTTP_NOT_ACCEPTABLE;
437: }
438: }
1.92 albertel 439: if ($env{'user.name'} eq 'public' &&
440: $env{'user.domain'} eq 'public' &&
441: $requrl !~ m{^/+(res|public|uploaded)/} &&
442: $requrl !~ m{^/adm/[^/]+/[^/]+/aboutme/portfolio$ }x &&
443: $requrl !~ m{^/+adm/(help|logout|restrictedaccess|randomlabel\.png)}) {
444: $env{'request.querystring'}=$r->args;
445: $env{'request.firsturl'}=$requrl;
446: return FORBIDDEN;
447: }
1.23 www 448: # ------------------------------------------------------------- This is allowed
1.92 albertel 449: if ($env{'request.course.id'}) {
1.24 www 450: &Apache::lonnet::countacc($requrl);
1.92 albertel 451: $requrl=~/\.(\w+)$/;
452: if ((&Apache::loncommon::fileembstyle($1) eq 'ssi') ||
453: ($requrl=~/^\/adm\/.*\/(aboutme|navmaps|smppg|bulletinboard)(\?|$ )/x) ||
454: ($requrl=~/^\/adm\/wrapper\//) ||
455: ($requrl=~m|^/adm/coursedocs/showdoc/|) ||
456: ($requrl=~m|\.problem/smpedit$|) ||
457: ($requrl=~/^\/public\/.*\/syllabus$/)) {
1.23 www 458: # ------------------------------------- This is serious stuff, get symb and log
1.29 www 459: my $query=$r->args;
1.92 albertel 460: my $symb;
461: if ($query) {
1.29 www 462: &Apache::loncommon::get_unprocessed_cgi($query,['symb']);
1.92 albertel 463: }
464: if ($env{'form.symb'}) {
1.64 albertel 465: $symb=&Apache::lonnet::symbclean($env{'form.symb'});
1.92 albertel 466: if ($requrl =~ m|^/adm/wrapper/|
1.72 albertel 467: || $requrl =~ m|^/adm/coursedocs/showdoc/|) {
1.92 albertel 468: my ($map,$mid,$murl)=&Apache::lonnet::decode_symb($symb);
469: &Apache::lonnet::symblist($map,$murl => [$murl,$mid],
1.63 albertel 470: 'last_known' =>[$murl,$mid]);
1.92 albertel 471: } elsif ((&Apache::lonnet::symbverify($symb,$requrl)) ||
1.53 albertel 472: (($requrl=~m|(.*)/smpedit$|) &&
473: &Apache::lonnet::symbverify($symb,$1))) {
1.92 albertel 474: my ($map,$mid,$murl)=&Apache::lonnet::decode_symb($symb);
475: &Apache::lonnet::symblist($map,$murl => [$murl,$mid],
476: 'last_known' =>[$murl,$mid]);
1.31 www 477: } else {
478: $r->log_reason('Invalid symb for '.$requrl.': '.
1.92 albertel 479: $symb);
480: $env{'user.error.msg'}=
481: "$requrl:bre:1:1:Invalid Access";
482: return HTTP_NOT_ACCEPTABLE;
483: }
484: } else {
485: $symb=&Apache::lonnet::symbread($requrl);
1.58 albertel 486: if (&Apache::lonnet::is_on_map($requrl) && $symb &&
1.56 albertel 487: !&Apache::lonnet::symbverify($symb,$requrl)) {
1.58 albertel 488: $r->log_reason('Invalid symb for '.$requrl.': '.$symb);
1.92 albertel 489: $env{'user.error.msg'}=
490: "$requrl:bre:1:1:Invalid Access";
491: return HTTP_NOT_ACCEPTABLE;
1.55 albertel 492: }
1.61 albertel 493: if ($symb) {
1.65 albertel 494: my ($map,$mid,$murl)=
495: &Apache::lonnet::decode_symb($symb);
1.63 albertel 496: &Apache::lonnet::symblist($map,$murl =>[$murl,$mid],
1.92 albertel 497: 'last_known' =>[$murl,$mid]);
1.61 albertel 498: }
1.92 albertel 499: }
500: $env{'request.symb'}=$symb;
501: &Apache::lonnet::courseacclog($symb);
502: } else {
1.23 www 503: # ------------------------------------------------------- This is other content
1.92 albertel 504: &Apache::lonnet::courseacclog($requrl);
505: }
1.88 albertel 506: }
1.92 albertel 507: return OK;
508: }
1.21 www 509: # -------------------------------------------- See if this is a public resource
1.68 albertel 510: if ($requrl=~m|^/+adm/+help/+|) {
1.89 albertel 511: return OK;
1.68 albertel 512: }
1.90 albertel 513: # ------------------------------------ See if this is a viewable portfolio file
1.89 albertel 514: if (&Apache::lonnet::is_portfolio_url($requrl)) {
1.90 albertel 515: my $access=&Apache::lonnet::allowed('bre',$requrl);
516: if ($access eq 'A') {
517: &Apache::restrictedaccess::setup_handler($r);
518: return OK;
519: }
520: if (($access ne '2') && ($access ne 'F')) {
521: $env{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
522: return HTTP_NOT_ACCEPTABLE;
523: }
1.79 raeburn 524: }
1.87 albertel 525:
1.34 www 526: # -------------------------------------------------------------- Not authorized
527: $requrl=~/\.(\w+)$/;
1.62 albertel 528: # if ((&Apache::loncommon::fileembstyle($1) eq 'ssi') ||
529: # ($requrl=~/^\/adm\/(roles|logout|email|menu|remote)/) ||
530: # ($requrl=~m|^/prtspool/|)) {
1.34 www 531: # -------------------------- Store where they wanted to go and get login screen
1.64 albertel 532: $env{'request.querystring'}=$r->args;
533: $env{'request.firsturl'}=$requrl;
1.34 www 534: return FORBIDDEN;
1.62 albertel 535: # } else {
1.34 www 536: # --------------------------------------------------------------------- Goodbye
1.62 albertel 537: # return HTTP_BAD_REQUEST;
538: # }
1.1 albertel 539: }
540:
541: 1;
542: __END__
1.120 jms 543:
1.121 jms 544: =pod
1.120 jms 545:
1.121 jms 546: =back
1.120 jms 547:
1.121 jms 548: =cut
1.120 jms 549:
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