1: # The LearningOnline Network
2: # User Authentication Module
3: #
4: # $Id: lonauth.pm,v 1.36 2003/02/03 18:03:52 harris41 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: # ------------------------------------------------------------ Successful login
49:
50: sub success {
51: my ($r, $username, $domain, $authhost,$lowerurl) = @_;
52: my $lonids=$r->dir_config('lonIDsDir');
53:
54: # See if old ID present, if so, remove
55:
56: my $filename;
57: opendir(DIR,$lonids);
58: while ($filename=readdir(DIR)) {
59: if ($filename=~/^$username\_\d+\_$domain\_$authhost\.id$/) {
60: unlink($lonids.'/'.$filename);
61: }
62: }
63: closedir(DIR);
64:
65: # Give them a new cookie
66:
67: my $cookie;
68: my $now=time;
69: $cookie="$username\_$now\_$domain\_$authhost";
70:
71: # Initialize roles
72:
73: my $userroles=Apache::lonnet::rolesinit($domain,$username,$authhost);
74:
75: # ------------------------------------ Check browser type and MathML capability
76:
77: my @browsertype=split(/\&/,$r->dir_config("lonBrowsDet"));
78: my %mathcap=split(/\&/,$r->dir_config("lonMathML"));
79: my $httpbrowser=$ENV{"HTTP_USER_AGENT"};
80: my $i;
81: my $clientbrowser='unknown';
82: my $clientversion='0';
83: my $clientmathml='';
84: my $clientunicode='0';
85: for ($i=0;$i<=$#browsertype;$i++) {
86: my ($bname,$match,$notmatch,$vreg,$minv,$univ)=split(/\:/,$browsertype[$i]);
87: if (($httpbrowser=~/$match/i) && ($httpbrowser!~/$notmatch/i)) {
88: $clientbrowser=$bname;
89: $httpbrowser=~/$vreg/i;
90: $clientversion=$1;
91: $clientmathml=($clientversion>=$minv);
92: $clientunicode=($clientversion>=$univ);
93: }
94: }
95: my $clientos='unknown';
96: if (($httpbrowser=~/linux/i) ||
97: ($httpbrowser=~/unix/i) ||
98: ($httpbrowser=~/ux/i) ||
99: ($httpbrowser=~/solaris/i)) { $clientos='unix'; }
100: if (($httpbrowser=~/vax/i) ||
101: ($httpbrowser=~/vms/i)) { $clientos='vms'; }
102: if ($httpbrowser=~/next/i) { $clientos='next'; }
103: if (($httpbrowser=~/mac/i) ||
104: ($httpbrowser=~/powerpc/i)) { $clientos='mac'; }
105: if ($httpbrowser=~/win/i) { $clientos='win'; }
106: if ($httpbrowser=~/embed/i) { $clientos='pda'; }
107:
108: # ------------------------------------------------------------- Get environment
109:
110: my $userenv;
111: my %userenv=Apache::lonnet::dump('environment',$domain,$username);
112: my ($tmp) = keys(%userenv);
113: if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
114: foreach my $key (keys(%userenv)) {
115: $userenv.="environment.$key=$userenv{$key}\n";
116: }
117: }
118: # --------------------------------------------------------- Write first profile
119:
120: {
121: my $idf=Apache::File->new(">$lonids/$cookie.id");
122: unless (flock($idf,LOCK_EX)) {
123: &Apache::lonnet::logthis("<font color=blue>WARNING: ".
124: 'Could not obtain exclusive lock in lonauth: '.$!);
125: $idf->close();
126: return 'error: '.$!;
127: }
128: if ($userenv ne '') { print $idf "$userenv\n"; }
129: print $idf "user.name=$username\n";
130: print $idf "user.domain=$domain\n";
131: print $idf "user.home=$authhost\n";
132: print $idf "browser.type=$clientbrowser\n";
133: print $idf "browser.version=$clientversion\n";
134: print $idf "browser.mathml=$clientmathml\n";
135: print $idf "browser.unicode=$clientunicode\n";
136: print $idf "browser.os=$clientos\n";
137: print $idf "request.course.fn=\n";
138: print $idf "request.course.uri=\n";
139: print $idf "request.course.sec=\n";
140: print $idf "request.role=cm\n";
141: print $idf "request.host=$ENV{'HTTP_HOST'}\n";
142: if ($userroles ne '') { print $idf "$userroles"; }
143: $idf->close();
144: }
145: $ENV{'request.role'}='cm';
146: $ENV{'browser.type'}=$clientbrowser;
147: # -------------------------------------------------------------------- Log this
148:
149: &Apache::lonnet::log($domain,$username,$authhost,
150: "Login $ENV{'REMOTE_ADDR'}");
151:
152: # ------------------------------------------------- Check for critical messages
153:
154: my @what=&Apache::lonnet::dump('critical',$domain,$username);
155: if ($what[0]) {
156: if (($what[0] ne 'con_lost') && ($what[0]!~/^error\:/)) {
157: $lowerurl='/adm/email?critical=display';
158: }
159: }
160:
161: # ------------------------------------------------------------ Get cookie ready
162:
163: $cookie="lonID=$cookie; path=/";
164: # -------------------------------------------------------- Menu script and info
165: my $windowinfo=&Apache::lonmenu::open($clientos);
166: my $startupremote=&Apache::lonmenu::startupremote($lowerurl);
167: my $setflags=&Apache::lonmenu::setflags();
168: my $maincall=&Apache::lonmenu::maincall();
169: # ------------------------------------------------- Output for successful login
170:
171: $r->send_cgi_header(<<ENDHEADER);
172: Content-type: text/html
173: Set-cookie: $cookie
174:
175: ENDHEADER
176: $r->print(<<ENDSUCCESS);
177: <html>
178: <head>
179: <title>Successful Login to the LearningOnline Network with CAPA</title>
180: $startupremote
181: </head>
182: <body bgcolor="#FFFFFF">
183: $setflags
184: $windowinfo
185: <h1>Welcome!</h1>
186: Welcome to the Learning<i>Online</i> Network with CAPA.
187: Please wait while your session
188: is being set up.<p>
189: <a href="/adm/loginproblems.html">Problems?</a></p>
190: $maincall
191: </body>
192: </html>
193: ENDSUCCESS
194: }
195:
196: # --------------------------------------------------------------- Failed login!
197:
198: sub failed {
199: my ($r,$message) = @_;
200: $r->send_cgi_header(<<ENDFHEADER);
201: Content-type: text/html
202:
203: ENDFHEADER
204: $r->print(<<ENDFAILED);
205: <html>
206: <head>
207: <title>Unsuccessful Login to the LearningOnline Network with CAPA</title>
208: </head>
209: <html>
210: <body bgcolor="#FFFFFF">
211: <h1>Sorry ...</h1>
212: <h2>$message to use the Learning<i>Online</i> Network with CAPA</h2>
213: </body>
214: </html>
215: ENDFAILED
216: }
217:
218: # ---------------------------------------------------------------- Main handler
219:
220: sub handler {
221: my $r = shift;
222:
223: my $buffer;
224: $r->read($buffer,$r->header_in('Content-length'));
225: my @pairs=split(/&/,$buffer);
226: my $pair; my $name; my $value; my %FORM;
227: foreach $pair (@pairs) {
228: ($name,$value) = split(/=/,$pair);
229: $value =~ tr/+/ /;
230: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
231: $FORM{$name}=$value;
232: }
233:
234: if ((!$FORM{'uname'}) || (!$FORM{'upass'}) || (!$FORM{'udom'})) {
235: failed($r,'Username, password and domain need to be specified');
236: return OK;
237: }
238: $FORM{'uname'} =~ s/\W//g;
239: $FORM{'udom'} =~ s/\W//g;
240:
241: my $role = $r->dir_config('lonRole');
242: my $domain = $r->dir_config('lonDefDomain');
243: my $prodir = $r->dir_config('lonUsersDir');
244:
245: # ---------------------------------------- Get the information from login token
246:
247: my $tmpinfo=Apache::lonnet::reply('tmpget:'.$FORM{'logtoken'},
248: $FORM{'serverid'});
249:
250: if (($tmpinfo=~/^error/) || ($tmpinfo eq 'con_lost')) {
251: failed($r,'Login token missing, inaccessible or expired');
252: return OK;
253: }
254:
255: my ($key,$firsturl)=split(/&/,$tmpinfo);
256:
257: my $keybin=pack("H16",$key);
258:
259: my $cipher;
260: if ($Crypt::DES::VERSION>=2.03) {
261: $cipher=new Crypt::DES $keybin;
262: }
263: else {
264: $cipher=new DES $keybin;
265: }
266:
267: my $upass=$cipher->decrypt(
268: unpack("a8",pack("H16",substr($FORM{'upass'},0,16))));
269:
270: $upass.=$cipher->decrypt(
271: unpack("a8",pack("H16",substr($FORM{'upass'},16,16))));
272:
273: $upass=substr($upass,1,ord(substr($upass,0,1)));
274:
275: # ---------------------------------------------------------------- Authenticate
276: my $authhost=Apache::lonnet::authenticate($FORM{'uname'},
277: $upass,
278: $FORM{'udom'});
279:
280: # --------------------------------------------------------------------- Failed?
281:
282: if ($authhost eq 'no_host') {
283: failed($r,'Username and/or password could not be authenticated');
284: return OK;
285: }
286:
287: if (($firsturl eq '') || ($firsturl eq '/adm/logout')) {
288: $firsturl='/adm/roles';
289: }
290:
291: success($r,$FORM{'uname'},$FORM{'udom'},$authhost,$firsturl);
292: return OK;
293: }
294:
295: 1;
296: __END__
297:
298:
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