1: # The LearningOnline Network
2: # User Authentication Module
3: #
4: # $Id: lonauth.pm,v 1.52 2003/06/06 02:24:49 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::loncommon();
46: use Apache::lonnet();
47: use Apache::lonmenu();
48: use Fcntl qw(:flock);
49:
50: my %FORM;
51:
52: # ------------------------------------------------------------ Successful login
53:
54: sub success {
55: my ($r, $username, $domain, $authhost,$lowerurl) = @_;
56: my $lonids=$r->dir_config('lonIDsDir');
57:
58: # See if old ID present, if so, remove
59:
60: my $filename;
61: opendir(DIR,$lonids);
62: while ($filename=readdir(DIR)) {
63: if ($filename=~/^$username\_\d+\_$domain\_$authhost\.id$/) {
64: unlink($lonids.'/'.$filename);
65: }
66: }
67: closedir(DIR);
68:
69: # Give them a new cookie
70:
71: my $cookie;
72: my $now=time;
73: $cookie="$username\_$now\_$domain\_$authhost";
74:
75: # Initialize roles
76:
77: my $userroles=Apache::lonnet::rolesinit($domain,$username,$authhost);
78:
79: # ------------------------------------ Check browser type and MathML capability
80:
81: my ($httpbrowser,$clientbrowser,$clientversion,$clientmathml,
82: $clientunicode,$clientos) = &Apache::loncommon::decode_user_agent($r);
83:
84: # -------------------------------------- Any accessibility options to remember?
85: if (($FORM{'interface'}) && ($FORM{'remember'} eq 'true')) {
86: foreach ('imagesuppress','appletsuppress',
87: 'embedsuppress','fontenhance','blackwhite') {
88: if ($FORM{$_} eq 'true') {
89: &Apache::lonnet::put('environment',{$_ => 'on'},
90: $domain,$username);
91: } else {
92: &Apache::lonnet::del('environment',[$_],$domain,$username);
93: }
94: }
95: }
96: # ------------------------------------------------------------- Get environment
97:
98: my $userenv;
99: my %userenv=Apache::lonnet::dump('environment',$domain,$username);
100: my ($tmp) = keys(%userenv);
101: if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
102: foreach my $key (keys(%userenv)) {
103: $userenv.="environment.$key=$userenv{$key}\n";
104: }
105: }
106: if (($userenv{'interface'}) && (!$FORM{'interface'})) {
107: $FORM{'interface'}=$userenv{'interface'};
108: }
109: $ENV{'environment.remote'}=$userenv{'remote'};
110: # --------------------------------------------------------- Write first profile
111:
112: {
113: my $idf=Apache::File->new(">$lonids/$cookie.id");
114: unless (flock($idf,LOCK_EX)) {
115: &Apache::lonnet::logthis("<font color=blue>WARNING: ".
116: 'Could not obtain exclusive lock in lonauth: '.$!);
117: $idf->close();
118: return 'error: '.$!;
119: }
120: if ($userenv ne '') { print $idf "$userenv\n"; }
121: print $idf "user.name=$username\n";
122: print $idf "user.domain=$domain\n";
123: print $idf "user.home=$authhost\n";
124: print $idf "browser.type=$clientbrowser\n";
125: print $idf "browser.version=$clientversion\n";
126: print $idf "browser.mathml=$clientmathml\n";
127: print $idf "browser.unicode=$clientunicode\n";
128: print $idf "browser.os=$clientos\n";
129: print $idf "request.course.fn=\n";
130: print $idf "request.course.uri=\n";
131: print $idf "request.course.sec=\n";
132: print $idf "request.role=cm\n";
133: print $idf "request.role.adv=$ENV{'user.adv'}\n";
134: print $idf "request.host=$ENV{'REMOTE_ADDR'}\n";
135: if ($FORM{'interface'}) {
136: $FORM{'interface'}=~s/\W//gs;
137: print $idf "browser.interface=$FORM{'interface'}\n";
138: $ENV{'browser.interface'}=$FORM{'interface'};
139: foreach ('imagesuppress','appletsuppress',
140: 'embedsuppress','fontenhance','blackwhite') {
141: if (($FORM{$_} eq 'true') ||
142: ($userenv{$_} eq 'on')) {
143: print $idf "browser.$_=on\n";
144: }
145: }
146: }
147: if ($userroles ne '') { print $idf "$userroles"; }
148: $idf->close();
149: }
150: $ENV{'request.role'}='cm';
151: $ENV{'request.role.adv'}=$ENV{'user.adv'};
152: $ENV{'browser.type'}=$clientbrowser;
153: # -------------------------------------------------------------------- Log this
154:
155: &Apache::lonnet::log($domain,$username,$authhost,
156: "Login $ENV{'REMOTE_ADDR'}");
157:
158: # ------------------------------------------------- Check for critical messages
159:
160: my @what=&Apache::lonnet::dump('critical',$domain,$username);
161: if ($what[0]) {
162: if (($what[0] ne 'con_lost') && ($what[0]!~/^error\:/)) {
163: $lowerurl='/adm/email?critical=display';
164: }
165: }
166:
167: # ------------------------------------------------------------ Get cookie ready
168:
169: $cookie="lonID=$cookie; path=/";
170: # -------------------------------------------------------- Menu script and info
171: my $windowinfo=&Apache::lonmenu::open($clientos);
172: my $startupremote=&Apache::lonmenu::startupremote($lowerurl);
173: my $setflags=&Apache::lonmenu::setflags();
174: my $maincall=&Apache::lonmenu::maincall();
175: my $bodytag=&Apache::loncommon::bodytag('Successful Login');
176: # ------------------------------------------------- Output for successful login
177:
178: $r->send_cgi_header(<<ENDHEADER);
179: Content-type: text/html
180: Set-cookie: $cookie
181:
182: ENDHEADER
183: $r->print(<<ENDSUCCESS);
184: <html>
185: <head>
186: <title>Successful Login to the LearningOnline Network with CAPA</title>
187: $startupremote
188: </head>
189: $bodytag
190: $setflags
191: $windowinfo
192: <h1>Welcome!</h1>
193: Welcome to the Learning<i>Online</i> Network with CAPA.
194: Please wait while your session
195: is being set up.<p>
196: <a href="/adm/loginproblems.html">Problems?</a></p>
197: $maincall
198: </body>
199: </html>
200: ENDSUCCESS
201: }
202:
203: # --------------------------------------------------------------- Failed login!
204:
205: sub failed {
206: my ($r,$message) = @_;
207: my $bodytag=&Apache::loncommon::bodytag('Unsuccessful Login');
208: $r->send_cgi_header(<<ENDFHEADER);
209: Content-type: text/html
210:
211: ENDFHEADER
212: $r->print(<<ENDFAILED);
213: <html>
214: <head>
215: <title>Unsuccessful Login to the LearningOnline Network with CAPA</title>
216: </head>
217: <html>
218: $bodytag
219: <h1>Sorry ...</h1>
220: <p><b>$message</b></p>
221: <p>Please <a href="/adm/login?username=$FORM{'uname'}&domain=$FORM{'udom'}">log in again</a>.</p>
222: <p>
223: <a href="/adm/loginproblems.html">Problems?</a></p>
224: </body>
225: </html>
226: ENDFAILED
227: }
228:
229: # ---------------------------------------------------------------- Main handler
230:
231: sub handler {
232: my $r = shift;
233:
234: my $buffer;
235: $r->read($buffer,$r->header_in('Content-length'),0);
236: my @pairs=split(/&/,$buffer);
237: my $pair; my $name; my $value;
238: undef %FORM;
239: %FORM=();
240: foreach $pair (@pairs) {
241: ($name,$value) = split(/=/,$pair);
242: $value =~ tr/+/ /;
243: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
244: $FORM{$name}=$value;
245: }
246:
247: if ((!$FORM{'uname'}) || (!$FORM{'upass'}) || (!$FORM{'udom'})) {
248: failed($r,'Username, password and domain need to be specified.');
249: return OK;
250: }
251: $FORM{'uname'} =~ s/\W//g;
252: $FORM{'udom'} =~ s/\W//g;
253:
254: my $role = $r->dir_config('lonRole');
255: my $domain = $r->dir_config('lonDefDomain');
256: my $prodir = $r->dir_config('lonUsersDir');
257:
258: # ---------------------------------------- Get the information from login token
259:
260: my $tmpinfo=Apache::lonnet::reply('tmpget:'.$FORM{'logtoken'},
261: $FORM{'serverid'});
262:
263: if (($tmpinfo=~/^error/) || ($tmpinfo eq 'con_lost')) {
264: failed($r,'Information needed to verify your login information is missing, inaccessible or expired.');
265: return OK;
266: } else {
267: unless (&Apache::lonnet::reply('tmpdel:'.$FORM{'logtoken'},
268: $FORM{'serverid'}) eq 'ok') {
269: &failed($r,'Session could not be opened.');
270: }
271: }
272: my ($key,$firsturl)=split(/&/,$tmpinfo);
273:
274: my $keybin=pack("H16",$key);
275:
276: my $cipher;
277: if ($Crypt::DES::VERSION>=2.03) {
278: $cipher=new Crypt::DES $keybin;
279: }
280: else {
281: $cipher=new DES $keybin;
282: }
283:
284: my $upass=$cipher->decrypt(
285: unpack("a8",pack("H16",substr($FORM{'upass'},0,16))));
286:
287: $upass.=$cipher->decrypt(
288: unpack("a8",pack("H16",substr($FORM{'upass'},16,16))));
289:
290: $upass=substr($upass,1,ord(substr($upass,0,1)));
291:
292: # ---------------------------------------------------------------- Authenticate
293: my $authhost=Apache::lonnet::authenticate($FORM{'uname'},
294: $upass,
295: $FORM{'udom'});
296:
297: # --------------------------------------------------------------------- Failed?
298:
299: if ($authhost eq 'no_host') {
300: failed($r,'Username and/or password could not be authenticated.');
301: return OK;
302: }
303:
304: if (($firsturl eq '') || ($firsturl eq '/adm/logout')) {
305: $firsturl='/adm/roles';
306: }
307:
308: success($r,$FORM{'uname'},$FORM{'udom'},$authhost,$firsturl);
309: return OK;
310: }
311:
312: 1;
313: __END__
314:
315:
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