Annotation of loncom/auth/lonacc.pm, revision 1.120
1.1 albertel 1: # The LearningOnline Network
2: # Cookie Based Access Handler
1.22 www 3: #
1.120 ! jms 4: # $Id: lonacc.pm,v 1.119 2008/11/18 19:14:34 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:
1.119 jms 30:
1.1 albertel 31: package Apache::lonacc;
32:
33: use strict;
1.8 www 34: use Apache::Constants qw(:common :http :methods);
1.2 www 35: use Apache::File;
1.6 www 36: use Apache::lonnet;
1.25 harris41 37: use Apache::loncommon();
1.47 www 38: use Apache::lonlocal;
1.86 albertel 39: use Apache::restrictedaccess();
1.103 raeburn 40: use Apache::blockedaccess();
1.16 www 41: use Fcntl qw(:flock);
1.85 raeburn 42: use LONCAPA;
1.1 albertel 43:
1.75 albertel 44: sub cleanup {
45: my ($r)=@_;
46: if (! $r->is_initial_req()) { return DECLINED; }
47: &Apache::lonnet::save_cache();
1.96 albertel 48: &Apache::lontexconvert::jsMath_reset();
1.75 albertel 49: return OK;
50: }
51:
52: sub goodbye {
53: my ($r)=@_;
54: &Apache::lonnet::goodbye();
55: return DONE;
56: }
57:
1.76 albertel 58: ###############################################
59:
60: sub get_posted_cgi {
1.114 raeburn 61: my ($r,$fields) = @_;
1.76 albertel 62:
63: my $buffer;
64: if ($r->header_in('Content-length')) {
65: $r->read($buffer,$r->header_in('Content-length'),0);
66: }
1.113 albertel 67: my $content_type = $r->header_in('Content-type');
68: if ($content_type !~ m{^multipart/form-data}) {
1.76 albertel 69: my @pairs=split(/&/,$buffer);
70: my $pair;
71: foreach $pair (@pairs) {
72: my ($name,$value) = split(/=/,$pair);
73: $value =~ tr/+/ /;
74: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
75: $name =~ tr/+/ /;
76: $name =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
1.114 raeburn 77: if (ref($fields) eq 'ARRAY') {
78: next if (!grep(/^\Q$name\E$/,@{$fields}));
79: }
1.77 albertel 80: &Apache::loncommon::add_to_env("form.$name",$value);
1.76 albertel 81: }
82: } else {
1.113 albertel 83: my ($contentsep) = ($content_type =~ /boundary=\"?([^\";,]+)\"?/);
1.76 albertel 84: my @lines = split (/\n/,$buffer);
85: my $name='';
86: my $value='';
87: my $fname='';
88: my $fmime='';
89: my $i;
90: for ($i=0;$i<=$#lines;$i++) {
1.113 albertel 91: if ($lines[$i]=~/^--\Q$contentsep\E/) {
1.76 albertel 92: if ($name) {
93: chomp($value);
1.114 raeburn 94: if (ref($fields) eq 'ARRAY') {
95: next if (!grep(/^\Q$name\E$/,@{$fields}));
96: }
1.118 raeburn 97: if ($fname) {
98: if ($env{'form.symb'} ne '') {
99: my $size = (length($value))/(1024.0 * 1024.0);
100: if (&upload_size_allowed($name,$size,$fname) eq 'ok') {
101: $env{"form.$name.filename"}=$fname;
102: $env{"form.$name.mimetype"}=$fmime;
103: &Apache::loncommon::add_to_env("form.$name",$value);
104: }
105: } else {
106: $env{"form.$name.filename"}=$fname;
107: $env{"form.$name.mimetype"}=$fmime;
108: &Apache::loncommon::add_to_env("form.$name",$value);
109: }
110: } else {
111: $value=~s/\s+$//s;
112: &Apache::loncommon::add_to_env("form.$name",$value);
113: }
1.76 albertel 114: }
115: if ($i<$#lines) {
116: $i++;
117: $lines[$i]=~
118: /Content\-Disposition\:\s*form\-data\;\s*name\=\"([^\"]+)\"/i;
119: $name=$1;
120: $value='';
121: if ($lines[$i]=~/filename\=\"([^\"]+)\"/i) {
122: $fname=$1;
123: if
124: ($lines[$i+1]=~/Content\-Type\:\s*([\w\-\/]+)/i) {
125: $fmime=$1;
126: $i++;
127: } else {
128: $fmime='';
129: }
130: } else {
131: $fname='';
132: $fmime='';
133: }
134: $i++;
135: }
136: } else {
137: $value.=$lines[$i]."\n";
138: }
139: }
140: }
141: #
142: # Digested POSTed values
143: #
144: # Remember the way this was originally done (GET or POST)
145: #
146: $env{'request.method'}=$ENV{'REQUEST_METHOD'};
147: #
148: # There may also be stuff in the query string
149: # Tell subsequent handlers that this was GET, not POST, so they can access query string.
150: # Also, unset POSTed content length to cover all tracks.
151: #
152:
153: $r->method_number(M_GET);
154:
155: $r->method('GET');
156: $r->headers_in->unset('Content-length');
157: }
158:
1.118 raeburn 159: #
160: # Perform size checks for file uploads to essayresponse items in course context.
161: #
162: # Add form.HWFILESIZE.$part_$id to %env with file size (MB)
163: # If file exceeds maximum allowed size, add form.HWFILETOOBIG.$part_$id to %env.
164: #
165:
166: sub upload_size_allowed {
167: my ($name,$size,$fname) = @_;
168: if ($name =~ /^HWFILE(\w+)$/) {
169: my $ident = $1;
170: my $item = 'HWFILESIZE'.$ident;
171: &Apache::loncommon::add_to_env("form.$item",$size);
172: my $maxsize= &Apache::lonnet::EXT("resource.$ident.maxfilesize");
173: if (!$maxsize) {
174: $maxsize = 100.0;
175: }
176: if ($size > $maxsize) {
177: my $warn = 'HWFILETOOBIG'.$ident;
178: &Apache::loncommon::add_to_env("form.$warn",$fname);
179: return;
180: }
181: }
182: return 'ok';
183: }
184:
1.94 albertel 185: # handle the case of the single sign on user, at this point $r->user
186: # will be set and valid now need to find the loncapa user info and possibly
187: # balance them
188: # returns OK if it was a SSO and user was handled
189: # undef if not SSO or no means to hanle the user
1.117 jms 190:
1.94 albertel 191: sub sso_login {
1.111 albertel 192: my ($r,$handle) = @_;
1.94 albertel 193:
194: my $lonidsdir=$r->dir_config('lonIDsDir');
195: if (!($r->user
196: && (!defined($env{'user.name'}) && !defined($env{'user.domain'}))
1.111 albertel 197: && ($handle eq ''))) {
1.94 albertel 198: # not an SSO case or already logged in
199: return undef;
200: }
201:
1.97 albertel 202: my ($user) = ($r->user =~ m/([a-zA-Z0-9_\-@.]*)/);
203:
1.94 albertel 204: my $domain = $r->dir_config('lonDefDomain');
1.97 albertel 205: my $home=&Apache::lonnet::homeserver($user,$domain);
1.94 albertel 206: if ($home !~ /(con_lost|no_host|no_such_host)/) {
1.107 albertel 207: &Apache::lonnet::logthis(" SSO authorized user $user ");
1.94 albertel 208: if ($r->dir_config("lonBalancer") eq 'yes') {
209: # login but immeaditly go to switch server to find us a new
210: # machine
1.97 albertel 211: &Apache::lonauth::success($r,$user,$domain,$home,'noredirect');
1.105 raeburn 212: $env{'request.sso.login'} = 1;
1.106 raeburn 213: if (defined($r->dir_config("lonSSOReloginServer"))) {
214: $env{'request.sso.reloginserver'} =
215: $r->dir_config('lonSSOReloginServer');
216: }
1.94 albertel 217: $r->internal_redirect('/adm/switchserver');
1.101 albertel 218: $r->set_handlers('PerlHandler'=> undef);
1.94 albertel 219: } else {
220: # need to login them in, so generate the need data that
221: # migrate expects to do login
222: my %info=('ip' => $r->connection->remote_ip(),
223: 'domain' => $domain,
1.97 albertel 224: 'username' => $user,
1.94 albertel 225: 'server' => $r->dir_config('lonHostID'),
226: 'sso.login' => 1
227: );
1.116 raeburn 228: if ($r->dir_config("ssodirecturl") == 1) {
229: $info{'origurl'} = $r->uri;
230: }
1.106 raeburn 231: if (defined($r->dir_config("lonSSOReloginServer"))) {
232: $info{'sso.reloginserver'} =
233: $r->dir_config('lonSSOReloginServer');
234: }
1.94 albertel 235: my $token =
236: &Apache::lonnet::tmpput(\%info,
237: $r->dir_config('lonHostID'));
238: $env{'form.token'} = $token;
239: $r->internal_redirect('/adm/migrateuser');
1.101 albertel 240: $r->set_handlers('PerlHandler'=> undef);
1.94 albertel 241: }
242: return OK;
1.98 albertel 243: } elsif (defined($r->dir_config('lonSSOUserUnknownRedirect'))) {
1.107 albertel 244: &Apache::lonnet::logthis(" SSO authorized unknown user $user ");
1.104 raeburn 245: $r->subprocess_env->set('SSOUserUnknown' => $user);
246: $r->subprocess_env->set('SSOUserDomain' => $domain);
1.115 raeburn 247: my @cancreate;
248: my %domconfig =
249: &Apache::lonnet::get_dom('configuration',['usercreation'],$domain);
250: if (ref($domconfig{'usercreation'}) eq 'HASH') {
251: if (ref($domconfig{'usercreation'}{'cancreate'}) eq 'HASH') {
252: if (ref($domconfig{'usercreation'}{'cancreate'}{'selfcreate'}) eq 'ARRAY') {
253: @cancreate = @{$domconfig{'usercreation'}{'cancreate'}{'selfcreate'}};
254: } elsif (($domconfig{'usercreation'}{'cancreate'}{'selfcreate'} ne 'none') &&
255: ($domconfig{'usercreation'}{'cancreate'}{'selfcreate'} ne '')) {
256: @cancreate = ($domconfig{'usercreation'}{'cancreate'}{'selfcreate'});
257: }
258: }
259: }
260: if (grep(/^sso$/,@cancreate)) {
261: $r->internal_redirect('/adm/createaccount');
262: } else {
263: $r->internal_redirect($r->dir_config('lonSSOUserUnknownRedirect'));
264: }
1.101 albertel 265: $r->set_handlers('PerlHandler'=> undef);
1.94 albertel 266: return OK;
267: }
268: return undef;
269: }
270:
1.1 albertel 271: sub handler {
272: my $r = shift;
273: my $requrl=$r->uri;
1.108 raeburn 274: if (&Apache::lonnet::is_domainimage($requrl)) {
275: return OK;
276: }
1.70 albertel 277:
1.111 albertel 278:
279: my $handle = &Apache::lonnet::check_for_valid_session($r);
1.93 albertel 280:
1.111 albertel 281: my $result = &sso_login($r,$handle);
1.100 albertel 282: if (defined($result)) {
1.116 raeburn 283: return $result;
1.70 albertel 284: }
285:
1.94 albertel 286:
1.70 albertel 287: if ($r->dir_config("lonBalancer") eq 'yes') {
288: $r->set_handlers('PerlResponseHandler'=>
289: [\&Apache::switchserver::handler]);
290: }
1.92 albertel 291:
292: if ($handle eq '') {
293: $r->log_reason("Cookie $handle not valid", $r->filename);
1.111 albertel 294: } elsif ($handle ne '') {
1.6 www 295:
1.46 www 296: # ------------------------------------------------------ Initialize Environment
1.111 albertel 297: my $lonidsdir=$r->dir_config('lonIDsDir');
1.92 albertel 298: &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);
1.47 www 299:
300: # --------------------------------------------------------- Initialize Language
301:
1.92 albertel 302: &Apache::lonlocal::get_language_handle($r);
303:
304: }
1.46 www 305:
1.92 albertel 306: # -------------------------------------------------- Should be a valid user now
307: if ($env{'user.name'} ne '' && $env{'user.domain'} ne '') {
1.46 www 308: # -------------------------------------------------------------- Resource State
1.6 www 309:
1.92 albertel 310: if ($requrl=~/^\/+(res|uploaded)\//) {
311: $env{'request.state'} = "published";
312: } else {
313: $env{'request.state'} = 'unknown';
314: }
315: $env{'request.filename'} = $r->filename;
316: $env{'request.noversionuri'} = &Apache::lonnet::deversion($requrl);
1.6 www 317: # -------------------------------------------------------- Load POST parameters
318:
1.92 albertel 319: &Apache::lonacc::get_posted_cgi($r);
1.6 www 320:
321: # ---------------------------------------------------------------- Check access
1.92 albertel 322: my $now = time;
1.95 albertel 323: if ($requrl !~ m{^/(?:adm|public|prtspool)/}
324: || $requrl =~ /^\/adm\/.*\/(smppg|bulletinboard)(\?|$ )/x) {
1.92 albertel 325: my $access=&Apache::lonnet::allowed('bre',$requrl);
326: if ($access eq '1') {
327: $env{'user.error.msg'}="$requrl:bre:0:0:Choose Course";
328: return HTTP_NOT_ACCEPTABLE;
329: }
330: if ($access eq 'A') {
331: &Apache::restrictedaccess::setup_handler($r);
332: return OK;
333: }
1.103 raeburn 334: if ($access eq 'B') {
335: &Apache::blockedaccess::setup_handler($r);
336: return OK;
337: }
1.92 albertel 338: if (($access ne '2') && ($access ne 'F')) {
339: $env{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
340: return HTTP_NOT_ACCEPTABLE;
1.37 albertel 341: }
1.92 albertel 342: }
343: if ($requrl =~ m|^/prtspool/|) {
344: my $start='/prtspool/'.$env{'user.name'}.'_'.
345: $env{'user.domain'};
346: if ($requrl !~ /^\Q$start\E/) {
347: $env{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
348: return HTTP_NOT_ACCEPTABLE;
1.67 albertel 349: }
1.92 albertel 350: }
1.109 banghart 351: if ($requrl =~ m|^/zipspool/|) {
1.110 banghart 352: my $start='/zipspool/zipout/'.$env{'user.name'}.":".
1.109 banghart 353: $env{'user.domain'};
354: if ($requrl !~ /^\Q$start\E/) {
355: $env{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
356: return HTTP_NOT_ACCEPTABLE;
357: }
358: }
1.92 albertel 359: if ($env{'user.name'} eq 'public' &&
360: $env{'user.domain'} eq 'public' &&
361: $requrl !~ m{^/+(res|public|uploaded)/} &&
362: $requrl !~ m{^/adm/[^/]+/[^/]+/aboutme/portfolio$ }x &&
363: $requrl !~ m{^/+adm/(help|logout|restrictedaccess|randomlabel\.png)}) {
364: $env{'request.querystring'}=$r->args;
365: $env{'request.firsturl'}=$requrl;
366: return FORBIDDEN;
367: }
1.23 www 368: # ------------------------------------------------------------- This is allowed
1.92 albertel 369: if ($env{'request.course.id'}) {
1.24 www 370: &Apache::lonnet::countacc($requrl);
1.92 albertel 371: $requrl=~/\.(\w+)$/;
372: if ((&Apache::loncommon::fileembstyle($1) eq 'ssi') ||
373: ($requrl=~/^\/adm\/.*\/(aboutme|navmaps|smppg|bulletinboard)(\?|$ )/x) ||
374: ($requrl=~/^\/adm\/wrapper\//) ||
375: ($requrl=~m|^/adm/coursedocs/showdoc/|) ||
376: ($requrl=~m|\.problem/smpedit$|) ||
377: ($requrl=~/^\/public\/.*\/syllabus$/)) {
1.23 www 378: # ------------------------------------- This is serious stuff, get symb and log
1.29 www 379: my $query=$r->args;
1.92 albertel 380: my $symb;
381: if ($query) {
1.29 www 382: &Apache::loncommon::get_unprocessed_cgi($query,['symb']);
1.92 albertel 383: }
384: if ($env{'form.symb'}) {
1.64 albertel 385: $symb=&Apache::lonnet::symbclean($env{'form.symb'});
1.92 albertel 386: if ($requrl =~ m|^/adm/wrapper/|
1.72 albertel 387: || $requrl =~ m|^/adm/coursedocs/showdoc/|) {
1.92 albertel 388: my ($map,$mid,$murl)=&Apache::lonnet::decode_symb($symb);
389: &Apache::lonnet::symblist($map,$murl => [$murl,$mid],
1.63 albertel 390: 'last_known' =>[$murl,$mid]);
1.92 albertel 391: } elsif ((&Apache::lonnet::symbverify($symb,$requrl)) ||
1.53 albertel 392: (($requrl=~m|(.*)/smpedit$|) &&
393: &Apache::lonnet::symbverify($symb,$1))) {
1.92 albertel 394: my ($map,$mid,$murl)=&Apache::lonnet::decode_symb($symb);
395: &Apache::lonnet::symblist($map,$murl => [$murl,$mid],
396: 'last_known' =>[$murl,$mid]);
1.31 www 397: } else {
398: $r->log_reason('Invalid symb for '.$requrl.': '.
1.92 albertel 399: $symb);
400: $env{'user.error.msg'}=
401: "$requrl:bre:1:1:Invalid Access";
402: return HTTP_NOT_ACCEPTABLE;
403: }
404: } else {
405: $symb=&Apache::lonnet::symbread($requrl);
1.58 albertel 406: if (&Apache::lonnet::is_on_map($requrl) && $symb &&
1.56 albertel 407: !&Apache::lonnet::symbverify($symb,$requrl)) {
1.58 albertel 408: $r->log_reason('Invalid symb for '.$requrl.': '.$symb);
1.92 albertel 409: $env{'user.error.msg'}=
410: "$requrl:bre:1:1:Invalid Access";
411: return HTTP_NOT_ACCEPTABLE;
1.55 albertel 412: }
1.61 albertel 413: if ($symb) {
1.65 albertel 414: my ($map,$mid,$murl)=
415: &Apache::lonnet::decode_symb($symb);
1.63 albertel 416: &Apache::lonnet::symblist($map,$murl =>[$murl,$mid],
1.92 albertel 417: 'last_known' =>[$murl,$mid]);
1.61 albertel 418: }
1.92 albertel 419: }
420: $env{'request.symb'}=$symb;
421: &Apache::lonnet::courseacclog($symb);
422: } else {
1.23 www 423: # ------------------------------------------------------- This is other content
1.92 albertel 424: &Apache::lonnet::courseacclog($requrl);
425: }
1.88 albertel 426: }
1.92 albertel 427: return OK;
428: }
1.21 www 429: # -------------------------------------------- See if this is a public resource
1.68 albertel 430: if ($requrl=~m|^/+adm/+help/+|) {
1.89 albertel 431: return OK;
1.68 albertel 432: }
1.90 albertel 433: # ------------------------------------ See if this is a viewable portfolio file
1.89 albertel 434: if (&Apache::lonnet::is_portfolio_url($requrl)) {
1.90 albertel 435: my $access=&Apache::lonnet::allowed('bre',$requrl);
436: if ($access eq 'A') {
437: &Apache::restrictedaccess::setup_handler($r);
438: return OK;
439: }
440: if (($access ne '2') && ($access ne 'F')) {
441: $env{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
442: return HTTP_NOT_ACCEPTABLE;
443: }
1.79 raeburn 444: }
1.87 albertel 445:
1.34 www 446: # -------------------------------------------------------------- Not authorized
447: $requrl=~/\.(\w+)$/;
1.62 albertel 448: # if ((&Apache::loncommon::fileembstyle($1) eq 'ssi') ||
449: # ($requrl=~/^\/adm\/(roles|logout|email|menu|remote)/) ||
450: # ($requrl=~m|^/prtspool/|)) {
1.34 www 451: # -------------------------- Store where they wanted to go and get login screen
1.64 albertel 452: $env{'request.querystring'}=$r->args;
453: $env{'request.firsturl'}=$requrl;
1.34 www 454: return FORBIDDEN;
1.62 albertel 455: # } else {
1.34 www 456: # --------------------------------------------------------------------- Goodbye
1.62 albertel 457: # return HTTP_BAD_REQUEST;
458: # }
1.1 albertel 459: }
460:
461: 1;
462: __END__
1.120 ! jms 463:
! 464:
! 465: =head1 NAME
! 466:
! 467: Apache::lonacc - Cookie Based Access Handler
! 468:
! 469: =head1 SYNOPSIS
! 470:
! 471: Invoked (for various locations) by /etc/httpd/conf/srm.conf:
! 472:
! 473: PerlAccessHandler Apache::lonacc
! 474:
! 475: =head1 INTRODUCTION
! 476:
! 477: This module enables cookie based authentication and is used
! 478: to control access for many different LON-CAPA URIs.
! 479:
! 480: Whenever the client sends the cookie back to the server,
! 481: this cookie is handled by either lonacc.pm or loncacc.pm
! 482: (see srm.conf for what is invoked when). If
! 483: the cookie is missing or invalid, the user is re-challenged
! 484: for login information.
! 485:
! 486: This is part of the LearningOnline Network with CAPA project
! 487: described at http://www.lon-capa.org.
! 488:
! 489: =head1 HANDLER SUBROUTINE
! 490:
! 491: This routine is called by Apache and mod_perl.
! 492:
! 493: =over 4
! 494:
! 495: =item *
! 496:
! 497: transfer profile into environment
! 498:
! 499: =item *
! 500:
! 501: load POST parameters
! 502:
! 503: =item *
! 504:
! 505: check access
! 506:
! 507: =item *
! 508:
! 509: if allowed, get symb, log, generate course statistics if applicable
! 510:
! 511: =item *
! 512:
! 513: otherwise return error
! 514:
! 515: =item *
! 516:
! 517: see if public resource
! 518:
! 519: =item *
! 520:
! 521: store attempted access
! 522:
! 523: =back
! 524:
! 525: =cut
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