Annotation of loncom/auth/lonacc.pm, revision 1.80
1.1 albertel 1: # The LearningOnline Network
2: # Cookie Based Access Handler
1.22 www 3: #
1.80 ! albertel 4: # $Id: lonacc.pm,v 1.79 2006/06/16 22:37:29 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:
30: package Apache::lonacc;
31:
32: use strict;
1.8 www 33: use Apache::Constants qw(:common :http :methods);
1.2 www 34: use Apache::File;
1.6 www 35: use Apache::lonnet;
1.25 harris41 36: use Apache::loncommon();
1.47 www 37: use Apache::lonlocal;
1.1 albertel 38: use CGI::Cookie();
1.16 www 39: use Fcntl qw(:flock);
1.1 albertel 40:
1.75 albertel 41: sub cleanup {
42: my ($r)=@_;
43: if (! $r->is_initial_req()) { return DECLINED; }
44: &Apache::lonnet::save_cache();
45: return OK;
46: }
47:
48: sub goodbye {
49: my ($r)=@_;
50: &Apache::lonnet::goodbye();
51: return DONE;
52: }
53:
1.76 albertel 54: ###############################################
55:
56: sub get_posted_cgi {
57: my ($r) = @_;
58:
59: my $buffer;
60: if ($r->header_in('Content-length')) {
61: $r->read($buffer,$r->header_in('Content-length'),0);
62: }
63: unless ($buffer=~/^(\-+\w+)\s+Content\-Disposition\:\s*form\-data/si) {
64: my @pairs=split(/&/,$buffer);
65: my $pair;
66: foreach $pair (@pairs) {
67: my ($name,$value) = split(/=/,$pair);
68: $value =~ tr/+/ /;
69: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
70: $name =~ tr/+/ /;
71: $name =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
1.77 albertel 72: &Apache::loncommon::add_to_env("form.$name",$value);
1.76 albertel 73: }
74: } else {
75: my $contentsep=$1;
76: my @lines = split (/\n/,$buffer);
77: my $name='';
78: my $value='';
79: my $fname='';
80: my $fmime='';
81: my $i;
82: for ($i=0;$i<=$#lines;$i++) {
83: if ($lines[$i]=~/^$contentsep/) {
84: if ($name) {
85: chomp($value);
86: if ($fname) {
87: $env{"form.$name.filename"}=$fname;
88: $env{"form.$name.mimetype"}=$fmime;
89: } else {
90: $value=~s/\s+$//s;
91: }
1.77 albertel 92: &Apache::loncommon::add_to_env("form.$name",$value);
1.76 albertel 93: }
94: if ($i<$#lines) {
95: $i++;
96: $lines[$i]=~
97: /Content\-Disposition\:\s*form\-data\;\s*name\=\"([^\"]+)\"/i;
98: $name=$1;
99: $value='';
100: if ($lines[$i]=~/filename\=\"([^\"]+)\"/i) {
101: $fname=$1;
102: if
103: ($lines[$i+1]=~/Content\-Type\:\s*([\w\-\/]+)/i) {
104: $fmime=$1;
105: $i++;
106: } else {
107: $fmime='';
108: }
109: } else {
110: $fname='';
111: $fmime='';
112: }
113: $i++;
114: }
115: } else {
116: $value.=$lines[$i]."\n";
117: }
118: }
119: }
120: #
121: # Digested POSTed values
122: #
123: # Remember the way this was originally done (GET or POST)
124: #
125: $env{'request.method'}=$ENV{'REQUEST_METHOD'};
126: #
127: # There may also be stuff in the query string
128: # Tell subsequent handlers that this was GET, not POST, so they can access query string.
129: # Also, unset POSTed content length to cover all tracks.
130: #
131:
132: $r->method_number(M_GET);
133:
134: $r->method('GET');
135: $r->headers_in->unset('Content-length');
136: }
137:
1.79 raeburn 138: sub portfolio_access {
139: my ($udom,$unum,$file_name,$group) = @_;
140: my $current_perms = &Apache::lonnet::get_portfile_permissions($udom,$unum);
141: my %access_controls = &Apache::lonnet::get_access_controls(
142: $current_perms,$group,$file_name);
143: my ($public);
144: my $now = time;
145: my $access_hash = $access_controls{$file_name};
146: if (ref($access_hash) eq 'HASH') {
147: foreach my $key (keys(%{$access_hash})) {
148: my ($num,$scope,$end,$start) = ($key =~ /^([^:]+):([a-z]+)_(\d*)_?(\d*)$/);
149: if ($start > $now) {
150: next;
151: }
152: if ($end && $end<$now) {
153: next;
154: }
155: if ($scope eq 'public') {
156: $public = $key;
157: last;
158: }
159: }
160: if ($public) {
161: return 'ok';
162: }
163: }
164: return;
165: }
1.76 albertel 166:
1.1 albertel 167: sub handler {
168: my $r = shift;
169: my $requrl=$r->uri;
170: my %cookies=CGI::Cookie->parse($r->header_in('Cookie'));
171: my $lonid=$cookies{'lonID'};
172: my $cookie;
1.70 albertel 173: my $lonidsdir=$r->dir_config('lonIDsDir');
174:
175: my $handle;
1.1 albertel 176: if ($lonid) {
1.70 albertel 177: $handle=$lonid->value;
1.1 albertel 178: $handle=~s/\W//g;
1.70 albertel 179: }
180:
1.78 albertel 181: my ($sso_login);
1.70 albertel 182: if ($r->user
183: && (!$lonid || !-e "$lonidsdir/$handle.id" || $handle eq '') ) {
1.78 albertel 184: $sso_login = 1;
1.70 albertel 185: my $domain = $r->dir_config('lonDefDomain');
186: my $home=&Apache::lonnet::homeserver($r->user,$domain);
187: if ($home !~ /(con_lost|no_such_host)/) {
188: $handle=&Apache::lonauth::success($r,$r->user,$domain,
189: $home,'noredirect');
190: $r->header_out('Set-cookie',"lonID=$handle; path=/");
191: }
192: }
193:
1.78 albertel 194: if ($sso_login) {
195: &Apache::lonnet::appenv('request.sso.login' => 1);
196: }
197:
1.70 albertel 198: if ($r->dir_config("lonBalancer") eq 'yes') {
199: $r->set_handlers('PerlResponseHandler'=>
200: [\&Apache::switchserver::handler]);
201: }
202:
203: if ($handle ne '') {
1.1 albertel 204: if ((-e "$lonidsdir/$handle.id") && ($handle ne '')) {
1.6 www 205:
1.46 www 206: # ------------------------------------------------------ Initialize Environment
207:
208: &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);
1.47 www 209:
210: # --------------------------------------------------------- Initialize Language
211:
1.48 www 212: &Apache::lonlocal::get_language_handle($r);
1.46 www 213:
214: # -------------------------------------------------------------- Resource State
1.6 www 215:
1.51 albertel 216: if ($requrl=~/^\/+(res|uploaded)\//) {
1.64 albertel 217: $env{'request.state'} = "published";
1.17 www 218: } else {
1.64 albertel 219: $env{'request.state'} = 'unknown';
1.17 www 220: }
1.64 albertel 221: $env{'request.filename'} = $r->filename;
222: $env{'request.noversionuri'} = &Apache::lonnet::deversion($requrl);
1.6 www 223: # -------------------------------------------------------- Load POST parameters
224:
1.76 albertel 225: &Apache::lonacc::get_posted_cgi($r);
1.6 www 226:
227: # ---------------------------------------------------------------- Check access
1.79 raeburn 228: my $now = time;
1.80 ! albertel 229: if ($requrl =~ m|/+uploaded/([^/]+)/([^/]+)/portfolio(/.+)$|) {
1.79 raeburn 230: my $result = &portfolio_access($1,$2,$3);
231: if ($result eq 'ok') {
232: return OK;
233: }
1.80 ! albertel 234: } elsif ($requrl =~ m|/+uploaded/([^/]+)/([^/]+)/groups/([^/]+)/portfolio/(.+)$|) {
1.79 raeburn 235: my $result = &portfolio_access($1,$2,$4.'/'.$3,$3);
236: if ($result eq 'ok') {
237: return OK;
238: }
239: }
1.37 albertel 240: if ($requrl!~/^\/adm|public|prtspool\//) {
1.7 www 241: my $access=&Apache::lonnet::allowed('bre',$requrl);
242: if ($access eq '1') {
1.64 albertel 243: $env{'user.error.msg'}="$requrl:bre:0:0:Choose Course";
1.7 www 244: return HTTP_NOT_ACCEPTABLE;
245: }
246: if (($access ne '2') && ($access ne 'F')) {
1.64 albertel 247: $env{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
1.7 www 248: return HTTP_NOT_ACCEPTABLE;
249: }
1.23 www 250: }
1.37 albertel 251: if ($requrl =~ m|^/prtspool/|) {
1.64 albertel 252: my $start='/prtspool/'.$env{'user.name'}.'_'.
253: $env{'user.domain'};
1.37 albertel 254: if ($requrl !~ /^\Q$start\E/) {
1.64 albertel 255: $env{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
1.37 albertel 256: return HTTP_NOT_ACCEPTABLE;
257: }
258: }
1.67 albertel 259: if ($env{'user.name'} eq 'public' &&
260: $env{'user.domain'} eq 'public' &&
261: $requrl !~ m{^/+(res|public)/} &&
1.69 www 262: $requrl !~ m{^/+adm/(help|logout|randomlabel\.png)}) {
1.67 albertel 263: $env{'request.querystring'}=$r->args;
264: $env{'request.firsturl'}=$requrl;
265: return FORBIDDEN;
266: }
1.23 www 267: # ------------------------------------------------------------- This is allowed
1.64 albertel 268: if ($env{'request.course.id'}) {
1.24 www 269: &Apache::lonnet::countacc($requrl);
1.23 www 270: $requrl=~/\.(\w+)$/;
1.39 www 271: if ((&Apache::loncommon::fileembstyle($1) eq 'ssi') ||
1.44 www 272: ($requrl=~/^\/adm\/.*\/(aboutme|navmaps|smppg|bulletinboard)(\?|$)/) ||
273: ($requrl=~/^\/adm\/wrapper\//) ||
1.72 albertel 274: ($requrl=~m|^/adm/coursedocs/showdoc/|) ||
1.53 albertel 275: ($requrl=~m|\.problem/smpedit$|) ||
1.39 www 276: ($requrl=~/^\/public\/.*\/syllabus$/)) {
1.23 www 277: # ------------------------------------- This is serious stuff, get symb and log
1.29 www 278: my $query=$r->args;
279: my $symb;
280: if ($query) {
281: &Apache::loncommon::get_unprocessed_cgi($query,['symb']);
282: }
1.64 albertel 283: if ($env{'form.symb'}) {
284: $symb=&Apache::lonnet::symbclean($env{'form.symb'});
1.72 albertel 285: if ($requrl =~ m|^/adm/wrapper/|
286: || $requrl =~ m|^/adm/coursedocs/showdoc/|) {
1.52 raeburn 287: my ($map,$mid,$murl)=&Apache::lonnet::decode_symb($symb);
1.63 albertel 288: &Apache::lonnet::symblist($map,$murl => [$murl,$mid],
289: 'last_known' =>[$murl,$mid]);
1.53 albertel 290: } elsif ((&Apache::lonnet::symbverify($symb,$requrl)) ||
291: (($requrl=~m|(.*)/smpedit$|) &&
292: &Apache::lonnet::symbverify($symb,$1))) {
1.50 albertel 293: my ($map,$mid,$murl)=&Apache::lonnet::decode_symb($symb);
1.74 albertel 294: &Apache::lonnet::symblist($map,$murl => [$murl,$mid],
1.63 albertel 295: 'last_known' =>[$murl,$mid]);
1.31 www 296: } else {
297: $r->log_reason('Invalid symb for '.$requrl.': '.
298: $symb);
1.64 albertel 299: $env{'user.error.msg'}=
1.31 www 300: "$requrl:bre:1:1:Invalid Access";
301: return HTTP_NOT_ACCEPTABLE;
302: }
1.29 www 303: } else {
1.44 www 304: $symb=&Apache::lonnet::symbread($requrl);
1.58 albertel 305: if (&Apache::lonnet::is_on_map($requrl) && $symb &&
1.56 albertel 306: !&Apache::lonnet::symbverify($symb,$requrl)) {
1.58 albertel 307: $r->log_reason('Invalid symb for '.$requrl.': '.$symb);
1.64 albertel 308: $env{'user.error.msg'}=
1.55 albertel 309: "$requrl:bre:1:1:Invalid Access";
310: return HTTP_NOT_ACCEPTABLE;
311: }
1.61 albertel 312: if ($symb) {
1.65 albertel 313: my ($map,$mid,$murl)=
314: &Apache::lonnet::decode_symb($symb);
1.63 albertel 315: &Apache::lonnet::symblist($map,$murl =>[$murl,$mid],
316: 'last_known' =>[$murl,$mid]);
1.61 albertel 317: }
1.29 www 318: }
1.64 albertel 319: $env{'request.symb'}=$symb;
1.23 www 320: &Apache::lonnet::courseacclog($symb);
321: } else {
322: # ------------------------------------------------------- This is other content
323: &Apache::lonnet::courseacclog($requrl);
324: }
325: }
1.2 www 326: return OK;
1.1 albertel 327: } else {
1.73 raeburn 328: $r->log_reason("Cookie $handle not valid", $r->filename);
329: }
1.1 albertel 330: }
1.6 www 331:
1.21 www 332: # -------------------------------------------- See if this is a public resource
1.37 albertel 333: if ($requrl=~m|^/public/|
334: || (&Apache::lonnet::metadata($requrl,'copyright') eq 'public')) {
1.21 www 335: &Apache::lonnet::logthis('Granting public access: '.$requrl);
1.71 www 336: &Apache::lonlocal::get_language_handle($r);
1.66 albertel 337: my $cookie=
338: &Apache::lonauth::success($r,'public','public','public');
339: my $lonidsdir=$r->dir_config('lonIDsDir');
340: &Apache::lonnet::transfer_profile_to_env($lonidsdir,$cookie);
1.76 albertel 341: &Apache::lonacc::get_posted_cgi($r);
1.64 albertel 342: $env{'request.state'} = "published";
343: $env{'request.publicaccess'} = 1;
344: $env{'request.filename'} = $r->filename;
1.59 albertel 345:
1.66 albertel 346: $r->header_out('Set-cookie',"lonID=$cookie; path=/");
1.21 www 347: return OK;
348: }
1.68 albertel 349: if ($requrl=~m|^/+adm/+help/+|) {
350: return OK;
351: }
1.79 raeburn 352: # ------------------------------------- See if this is a viewable portfolio file
1.80 ! albertel 353: if ($requrl =~ m|/+uploaded/([^/]+)/([^/]+)/portfolio(/.+)$|) {
1.79 raeburn 354: my $result = &portfolio_access($1,$2,$3);
355: if ($result eq 'ok') {
356: return OK;
357: }
1.80 ! albertel 358: } elsif ($requrl =~ m|/+uploaded/([^/]+)/([^/]+)/groups/([^/]+)/portfolio/(.+)$|) {
1.79 raeburn 359: my $result = &portfolio_access($1,$2,$4.'/'.$3,$3);
360: if ($result eq 'ok') {
361: return OK;
362: }
363: }
1.34 www 364: # -------------------------------------------------------------- Not authorized
365: $requrl=~/\.(\w+)$/;
1.62 albertel 366: # if ((&Apache::loncommon::fileembstyle($1) eq 'ssi') ||
367: # ($requrl=~/^\/adm\/(roles|logout|email|menu|remote)/) ||
368: # ($requrl=~m|^/prtspool/|)) {
1.34 www 369: # -------------------------- Store where they wanted to go and get login screen
1.64 albertel 370: $env{'request.querystring'}=$r->args;
371: $env{'request.firsturl'}=$requrl;
1.34 www 372: return FORBIDDEN;
1.62 albertel 373: # } else {
1.34 www 374: # --------------------------------------------------------------------- Goodbye
1.62 albertel 375: # return HTTP_BAD_REQUEST;
376: # }
1.1 albertel 377: }
378:
379: 1;
380: __END__
1.25 harris41 381:
382: =head1 NAME
383:
384: Apache::lonacc - Cookie Based Access Handler
385:
386: =head1 SYNOPSIS
387:
388: Invoked (for various locations) by /etc/httpd/conf/srm.conf:
389:
390: PerlAccessHandler Apache::lonacc
391:
392: =head1 INTRODUCTION
393:
394: This module enables cookie based authentication and is used
395: to control access for many different LON-CAPA URIs.
396:
397: Whenever the client sends the cookie back to the server,
398: this cookie is handled by either lonacc.pm or loncacc.pm
399: (see srm.conf for what is invoked when). If
400: the cookie is missing or invalid, the user is re-challenged
401: for login information.
402:
403: This is part of the LearningOnline Network with CAPA project
404: described at http://www.lon-capa.org.
405:
406: =head1 HANDLER SUBROUTINE
407:
408: This routine is called by Apache and mod_perl.
409:
410: =over 4
411:
412: =item *
413:
414: transfer profile into environment
415:
416: =item *
417:
418: load POST parameters
419:
420: =item *
421:
422: check access
423:
424: =item *
425:
426: if allowed, get symb, log, generate course statistics if applicable
427:
428: =item *
429:
430: otherwise return error
431:
432: =item *
433:
434: see if public resource
435:
436: =item *
437:
438: store attempted access
439:
440: =back
441:
442: =cut
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