1: # The LearningOnline Network
2: # User Authentication Module
3: #
4: # $Id: lonauth.pm,v 1.39 2003/02/18 21:11:17 www 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: # 5/21/99,5/22,5/25,5/26,5/27,5/29,6/2,6/11,6/14,6/15
29: # 16/11,12/16,
30: # 1/14,2/24,2/28,2/29,3/7,5/29,5/30,5/31,6/1,6/5,6/29,
31: # 7/1,7/10,10/2,10/5,10/9,10/26,10/30,11/10,
32: # 05/28,05/29 Gerd Kortemeyer
33: # 07/28,08/03 Gerd Kortemeyer
34: # 8/20 Gerd Kortemeyer
35:
36: package Apache::lonauth;
37:
38: use strict;
39: use Apache::Constants qw(:common);
40: use Apache::File;
41: use CGI qw(:standard);
42: use CGI::Cookie();
43: use DynaLoader; # for Crypt::DES version
44: use Crypt::DES;
45: use Apache::lonnet();
46: use Apache::lonmenu();
47: use Fcntl qw(:flock);
48:
49: my %FORM;
50:
51: # ------------------------------------------------------------ Successful login
52:
53: sub success {
54: my ($r, $username, $domain, $authhost,$lowerurl) = @_;
55: my $lonids=$r->dir_config('lonIDsDir');
56:
57: # See if old ID present, if so, remove
58:
59: my $filename;
60: opendir(DIR,$lonids);
61: while ($filename=readdir(DIR)) {
62: if ($filename=~/^$username\_\d+\_$domain\_$authhost\.id$/) {
63: unlink($lonids.'/'.$filename);
64: }
65: }
66: closedir(DIR);
67:
68: # Give them a new cookie
69:
70: my $cookie;
71: my $now=time;
72: $cookie="$username\_$now\_$domain\_$authhost";
73:
74: # Initialize roles
75:
76: my $userroles=Apache::lonnet::rolesinit($domain,$username,$authhost);
77:
78: # ------------------------------------ Check browser type and MathML capability
79:
80: my @browsertype=split(/\&/,$r->dir_config("lonBrowsDet"));
81: my %mathcap=split(/\&/,$r->dir_config("lonMathML"));
82: my $httpbrowser=$ENV{"HTTP_USER_AGENT"};
83: my $i;
84: my $clientbrowser='unknown';
85: my $clientversion='0';
86: my $clientmathml='';
87: my $clientunicode='0';
88: for ($i=0;$i<=$#browsertype;$i++) {
89: my ($bname,$match,$notmatch,$vreg,$minv,$univ)=split(/\:/,$browsertype[$i]);
90: if (($httpbrowser=~/$match/i) && ($httpbrowser!~/$notmatch/i)) {
91: $clientbrowser=$bname;
92: $httpbrowser=~/$vreg/i;
93: $clientversion=$1;
94: $clientmathml=($clientversion>=$minv);
95: $clientunicode=($clientversion>=$univ);
96: }
97: }
98: my $clientos='unknown';
99: if (($httpbrowser=~/linux/i) ||
100: ($httpbrowser=~/unix/i) ||
101: ($httpbrowser=~/ux/i) ||
102: ($httpbrowser=~/solaris/i)) { $clientos='unix'; }
103: if (($httpbrowser=~/vax/i) ||
104: ($httpbrowser=~/vms/i)) { $clientos='vms'; }
105: if ($httpbrowser=~/next/i) { $clientos='next'; }
106: if (($httpbrowser=~/mac/i) ||
107: ($httpbrowser=~/powerpc/i)) { $clientos='mac'; }
108: if ($httpbrowser=~/win/i) { $clientos='win'; }
109: if ($httpbrowser=~/embed/i) { $clientos='pda'; }
110:
111: # ------------------------------------------------------------- Get environment
112:
113: my $userenv;
114: my %userenv=Apache::lonnet::dump('environment',$domain,$username);
115: my ($tmp) = keys(%userenv);
116: if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
117: foreach my $key (keys(%userenv)) {
118: $userenv.="environment.$key=$userenv{$key}\n";
119: }
120: }
121: if (($userenv{'interface'}) && (!$FORM{'interface'})) {
122: $FORM{'interface'}=$userenv{'interface'};
123: }
124: # --------------------------------------------------------- Write first profile
125:
126: {
127: my $idf=Apache::File->new(">$lonids/$cookie.id");
128: unless (flock($idf,LOCK_EX)) {
129: &Apache::lonnet::logthis("<font color=blue>WARNING: ".
130: 'Could not obtain exclusive lock in lonauth: '.$!);
131: $idf->close();
132: return 'error: '.$!;
133: }
134: if ($userenv ne '') { print $idf "$userenv\n"; }
135: print $idf "user.name=$username\n";
136: print $idf "user.domain=$domain\n";
137: print $idf "user.home=$authhost\n";
138: print $idf "browser.type=$clientbrowser\n";
139: print $idf "browser.version=$clientversion\n";
140: print $idf "browser.mathml=$clientmathml\n";
141: print $idf "browser.unicode=$clientunicode\n";
142: print $idf "browser.os=$clientos\n";
143: print $idf "request.course.fn=\n";
144: print $idf "request.course.uri=\n";
145: print $idf "request.course.sec=\n";
146: print $idf "request.role=cm\n";
147: print $idf "request.host=$ENV{'HTTP_HOST'}\n";
148: if ($FORM{'interface'}) {
149: $FORM{'interface'}=~s/\W//gs;
150: print $idf "browser.interface=$FORM{'interface'}\n";
151: $ENV{'browser.interface'}=$FORM{'interface'};
152: }
153: foreach
154: ('imagesuppress','appletsuppress',
155: 'embedsuppress','fontenhance','blackwhite') {
156: if (($FORM{$_} eq 'on') ||
157: ($userenv{$_} eq 'on')) {
158: print $idf "browser.$_=on\n";
159: }
160: }
161: if ($userroles ne '') { print $idf "$userroles"; }
162: $idf->close();
163: }
164: $ENV{'request.role'}='cm';
165: $ENV{'browser.type'}=$clientbrowser;
166: # -------------------------------------------------------------------- Log this
167:
168: &Apache::lonnet::log($domain,$username,$authhost,
169: "Login $ENV{'REMOTE_ADDR'}");
170:
171: # ------------------------------------------------- Check for critical messages
172:
173: my @what=&Apache::lonnet::dump('critical',$domain,$username);
174: if ($what[0]) {
175: if (($what[0] ne 'con_lost') && ($what[0]!~/^error\:/)) {
176: $lowerurl='/adm/email?critical=display';
177: }
178: }
179:
180: # ------------------------------------------------------------ Get cookie ready
181:
182: $cookie="lonID=$cookie; path=/";
183: # -------------------------------------------------------- Menu script and info
184: my $windowinfo=&Apache::lonmenu::open($clientos);
185: my $startupremote=&Apache::lonmenu::startupremote($lowerurl);
186: my $setflags=&Apache::lonmenu::setflags();
187: my $maincall=&Apache::lonmenu::maincall();
188: # ------------------------------------------------- Output for successful login
189:
190: $r->send_cgi_header(<<ENDHEADER);
191: Content-type: text/html
192: Set-cookie: $cookie
193:
194: ENDHEADER
195: $r->print(<<ENDSUCCESS);
196: <html>
197: <head>
198: <title>Successful Login to the LearningOnline Network with CAPA</title>
199: $startupremote
200: </head>
201: <body bgcolor="#FFFFFF">
202: $setflags
203: $windowinfo
204: <h1>Welcome!</h1>
205: Welcome to the Learning<i>Online</i> Network with CAPA.
206: Please wait while your session
207: is being set up.<p>
208: <a href="/adm/loginproblems.html">Problems?</a></p>
209: $maincall
210: </body>
211: </html>
212: ENDSUCCESS
213: }
214:
215: # --------------------------------------------------------------- Failed login!
216:
217: sub failed {
218: my ($r,$message) = @_;
219: $r->send_cgi_header(<<ENDFHEADER);
220: Content-type: text/html
221:
222: ENDFHEADER
223: $r->print(<<ENDFAILED);
224: <html>
225: <head>
226: <title>Unsuccessful Login to the LearningOnline Network with CAPA</title>
227: </head>
228: <html>
229: <body bgcolor="#FFFFFF">
230: <h1>Sorry ...</h1>
231: <h2>$message to use the Learning<i>Online</i> Network with CAPA</h2>
232: </body>
233: </html>
234: ENDFAILED
235: }
236:
237: # ---------------------------------------------------------------- Main handler
238:
239: sub handler {
240: my $r = shift;
241:
242: my $buffer;
243: $r->read($buffer,$r->header_in('Content-length'));
244: my @pairs=split(/&/,$buffer);
245: my $pair; my $name; my $value;
246: undef %FORM;
247: %FORM=();
248: foreach $pair (@pairs) {
249: ($name,$value) = split(/=/,$pair);
250: $value =~ tr/+/ /;
251: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
252: $FORM{$name}=$value;
253: }
254:
255: if ((!$FORM{'uname'}) || (!$FORM{'upass'}) || (!$FORM{'udom'})) {
256: failed($r,'Username, password and domain need to be specified');
257: return OK;
258: }
259: $FORM{'uname'} =~ s/\W//g;
260: $FORM{'udom'} =~ s/\W//g;
261:
262: my $role = $r->dir_config('lonRole');
263: my $domain = $r->dir_config('lonDefDomain');
264: my $prodir = $r->dir_config('lonUsersDir');
265:
266: # ---------------------------------------- Get the information from login token
267:
268: my $tmpinfo=Apache::lonnet::reply('tmpget:'.$FORM{'logtoken'},
269: $FORM{'serverid'});
270:
271: if (($tmpinfo=~/^error/) || ($tmpinfo eq 'con_lost')) {
272: failed($r,'Login token missing, inaccessible or expired');
273: return OK;
274: }
275:
276: my ($key,$firsturl)=split(/&/,$tmpinfo);
277:
278: my $keybin=pack("H16",$key);
279:
280: my $cipher;
281: if ($Crypt::DES::VERSION>=2.03) {
282: $cipher=new Crypt::DES $keybin;
283: }
284: else {
285: $cipher=new DES $keybin;
286: }
287:
288: my $upass=$cipher->decrypt(
289: unpack("a8",pack("H16",substr($FORM{'upass'},0,16))));
290:
291: $upass.=$cipher->decrypt(
292: unpack("a8",pack("H16",substr($FORM{'upass'},16,16))));
293:
294: $upass=substr($upass,1,ord(substr($upass,0,1)));
295:
296: # ---------------------------------------------------------------- Authenticate
297: my $authhost=Apache::lonnet::authenticate($FORM{'uname'},
298: $upass,
299: $FORM{'udom'});
300:
301: # --------------------------------------------------------------------- Failed?
302:
303: if ($authhost eq 'no_host') {
304: failed($r,'Username and/or password could not be authenticated');
305: return OK;
306: }
307:
308: if (($firsturl eq '') || ($firsturl eq '/adm/logout')) {
309: $firsturl='/adm/roles';
310: }
311:
312: success($r,$FORM{'uname'},$FORM{'udom'},$authhost,$firsturl);
313: return OK;
314: }
315:
316: 1;
317: __END__
318:
319:
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