1: # The LearningOnline Network
2: # User Authentication Module
3: #
4: # $Id: lonauth.pm,v 1.61 2004/01/13 16:29:40 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: use Apache::lonlocal;
50:
51: my %FORM;
52:
53: # ------------------------------------------------------------ Successful login
54:
55: sub success {
56: my ($r, $username, $domain, $authhost,$lowerurl) = @_;
57: my $lonids=$r->dir_config('lonIDsDir');
58:
59: # See if old ID present, if so, remove
60:
61: my $filename;
62: opendir(DIR,$lonids);
63: while ($filename=readdir(DIR)) {
64: if ($filename=~/^$username\_\d+\_$domain\_$authhost\.id$/) {
65: unlink($lonids.'/'.$filename);
66: }
67: }
68: closedir(DIR);
69:
70: # Give them a new cookie
71:
72: my $cookie;
73: my $now=time;
74: $cookie="$username\_$now\_$domain\_$authhost";
75:
76: # Initialize roles
77:
78: my $userroles=Apache::lonnet::rolesinit($domain,$username,$authhost);
79:
80: # ------------------------------------ Check browser type and MathML capability
81:
82: my ($httpbrowser,$clientbrowser,$clientversion,$clientmathml,
83: $clientunicode,$clientos) = &Apache::loncommon::decode_user_agent($r);
84:
85: # -------------------------------------- Any accessibility options to remember?
86: if (($FORM{'interface'}) && ($FORM{'remember'} eq 'true')) {
87: foreach ('imagesuppress','appletsuppress',
88: 'embedsuppress','fontenhance','blackwhite') {
89: if ($FORM{$_} eq 'true') {
90: &Apache::lonnet::put('environment',{$_ => 'on'},
91: $domain,$username);
92: } else {
93: &Apache::lonnet::del('environment',[$_],$domain,$username);
94: }
95: }
96: }
97: # ------------------------------------------------------------- Get environment
98:
99: my $userenv;
100: my %userenv=Apache::lonnet::dump('environment',$domain,$username);
101: my ($tmp) = keys(%userenv);
102: if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
103: foreach my $key (keys(%userenv)) {
104: $userenv.="environment.$key=$userenv{$key}\n";
105: }
106: }
107: if (($userenv{'interface'}) && (!$FORM{'interface'})) {
108: $FORM{'interface'}=$userenv{'interface'};
109: }
110: $ENV{'environment.remote'}=$userenv{'remote'};
111: # --------------- Do not trust query string to be put directly into environment
112: foreach ('imagesuppress','appletsuppress',
113: 'embedsuppress','fontenhance','blackwhite',
114: 'interface','localpath','localres') {
115: $FORM{$_}=~s/[\n\r\=]//gs;
116: }
117: # --------------------------------------------------------- Write first profile
118:
119: {
120: my $idf=Apache::File->new(">$lonids/$cookie.id");
121: unless (flock($idf,LOCK_EX)) {
122: &Apache::lonnet::logthis("<font color=blue>WARNING: ".
123: 'Could not obtain exclusive lock in lonauth: '.$!);
124: $idf->close();
125: return 'error: '.$!;
126: }
127: if ($userenv ne '') { print $idf "$userenv\n"; }
128: print $idf "user.name=$username\n";
129: print $idf "user.domain=$domain\n";
130: print $idf "user.home=$authhost\n";
131: print $idf "browser.type=$clientbrowser\n";
132: print $idf "browser.version=$clientversion\n";
133: print $idf "browser.mathml=$clientmathml\n";
134: print $idf "browser.unicode=$clientunicode\n";
135: print $idf "browser.os=$clientos\n";
136: if ($FORM{'localpath'}) {
137: print $idf "browser.localpath=$FORM{'localpath'}\n";
138: print $idf "browser.localres=$FORM{'localres'}\n";
139: }
140: print $idf "request.course.fn=\n";
141: print $idf "request.course.uri=\n";
142: print $idf "request.course.sec=\n";
143: print $idf "request.role=cm\n";
144: print $idf "request.role.adv=$ENV{'user.adv'}\n";
145: print $idf "request.host=$ENV{'REMOTE_ADDR'}\n";
146: if ($FORM{'interface'}) {
147: $FORM{'interface'}=~s/\W//gs;
148: print $idf "browser.interface=$FORM{'interface'}\n";
149: $ENV{'browser.interface'}=$FORM{'interface'};
150: foreach ('imagesuppress','appletsuppress',
151: 'embedsuppress','fontenhance','blackwhite') {
152: if (($FORM{$_} eq 'true') ||
153: ($userenv{$_} eq 'on')) {
154: print $idf "browser.$_=on\n";
155: }
156: }
157: }
158: if ($userroles ne '') { print $idf "$userroles"; }
159: $idf->close();
160: }
161: $ENV{'request.role'}='cm';
162: $ENV{'request.role.adv'}=$ENV{'user.adv'};
163: $ENV{'browser.type'}=$clientbrowser;
164: # -------------------------------------------------------------------- Log this
165:
166: &Apache::lonnet::log($domain,$username,$authhost,
167: "Login $ENV{'REMOTE_ADDR'}");
168:
169: # ------------------------------------------------- Check for critical messages
170:
171: my @what=&Apache::lonnet::dump('critical',$domain,$username);
172: if ($what[0]) {
173: if (($what[0] ne 'con_lost') && ($what[0]!~/^error\:/)) {
174: $lowerurl='/adm/email?critical=display';
175: }
176: }
177:
178: # ------------------------------------------------------------ Get cookie ready
179:
180: $cookie="lonID=$cookie; path=/";
181: # -------------------------------------------------------- Menu script and info
182: my $windowinfo=&Apache::lonmenu::open($clientos);
183: my $startupremote=&Apache::lonmenu::startupremote($lowerurl);
184: my $setflags=&Apache::lonmenu::setflags();
185: my $maincall=&Apache::lonmenu::maincall();
186: my $bodytag=&Apache::loncommon::bodytag('Successful Login');
187: my $add=&addcontent();
188: # ------------------------------------------------- Output for successful login
189:
190: $r->send_cgi_header(<<ENDHEADER);
191: Content-type: text/html$add
192: Set-cookie: $cookie
193:
194: ENDHEADER
195: my %lt=&Apache::lonlocal::texthash(
196: 'wel' => 'Welcome',
197: 'mes' => 'Welcome to the Learning<i>Online</i> Network with CAPA. Please wait while your session is being set up',
198: 'pro' => 'Problems',
199: 'log' => 'loginproblems.html',
200: );
201: $r->print(<<ENDSUCCESS);
202: <html>
203: <head>
204: <title>Successful Login to the LearningOnline Network with CAPA</title>
205: $startupremote
206: </head>
207: $bodytag
208: $setflags
209: $windowinfo
210: <h1>$lt{'wel'}</h1>
211: $lt{'mes'}.<p>
212: <a href="/adm/$lt{'log'}">$lt{'pro'}?</a></p>
213: $maincall
214: </body>
215: </html>
216: ENDSUCCESS
217: }
218:
219: # --------------------------------------------------------------- Failed login!
220:
221: sub failed {
222: my ($r,$message) = @_;
223: my $bodytag=&Apache::loncommon::bodytag('Unsuccessful Login');
224: my $add=&addcontent();
225: $r->send_cgi_header(<<ENDFHEADER);
226: Content-type: text/html$add
227:
228: ENDFHEADER
229: $r->print(<<ENDFAILED);
230: <html>
231: <head>
232: <title>Unsuccessful Login to the LearningOnline Network with CAPA</title>
233: </head>
234: <html>
235: $bodytag
236: <h1>Sorry ...</h1>
237: <p><b>$message</b></p>
238: <p>Please <a href="/adm/login?username=$FORM{'uname'}&domain=$FORM{'udom'}">log in again</a>.</p>
239: <p>
240: <a href="/adm/loginproblems.html">Problems?</a></p>
241: </body>
242: </html>
243: ENDFAILED
244: }
245:
246: # --------------------------------------------------------------------- Charset
247:
248: sub addcontent {
249: my $encoding=&Apache::lonlocal::current_encoding;
250: if ($encoding) {
251: return '; charset='.$encoding;
252: } else {
253: return '';
254: }
255: }
256:
257: # ------------------------------------------------------------------ Rerouting!
258:
259: sub reroute {
260: my $r=shift;
261: my $bodytag=&Apache::loncommon::bodytag('Rerouting');
262: $r->send_cgi_header(<<ENDRFHEADER);
263: Content-type: text/html
264:
265: ENDRFHEADER
266: $r->print(<<ENDRFAILED);
267: <html>
268: <head>
269: <title>Rerouting Login to the LearningOnline Network with CAPA</title>
270: </head>
271: <html>
272: $bodytag
273: <h1>Sorry ...</h1>
274: Please <a href="/">log in again</a>.
275: </body>
276: </html>
277: ENDRFAILED
278: }
279:
280: # ---------------------------------------------------------------- Main handler
281:
282: sub handler {
283: my $r = shift;
284:
285: # Are we re-routing?
286: if (-e '/home/httpd/html/lon-status/reroute.txt') {
287: &reroute($r);
288: return OK;
289: }
290:
291: &Apache::lonlocal::get_language_handle($r);
292:
293: # -------------------------------- Prevent users from attempting to login twice
294: my %cookies=CGI::Cookie->parse($r->header_in('Cookie'));
295: my $lonid=$cookies{'lonID'};
296: my $cookie;
297: if ($lonid) {
298: my $handle=$lonid->value;
299: $handle=~s/\W//g;
300: my $lonidsdir=$r->dir_config('lonIDsDir');
301: if ((-e "$lonidsdir/$handle.id") && ($handle ne '')) {
302: # Indeed, a valid token is found
303: $r->send_cgi_header(<<ENDFHEADER);
304: Content-type: text/html
305:
306: ENDFHEADER
307: my $bodytag=&Apache::loncommon::bodytag('Already logged in');
308: $r->print(<<ENDFAILED);
309: <html>
310: <head>
311: <title>Already logged in</title>
312: </head>
313: <html>
314: $bodytag
315: <h1>You are already logged in</h1>
316: <p>Please either <a href="/adm/roles">continue the current session</a> or
317: <a href="/adm/logout">logout</a>.</p>
318: <p>
319: <a href="/adm/loginproblems.html">Problems?</a></p>
320: </body>
321: </html>
322: ENDFAILED
323: return OK;
324: }
325: }
326:
327: # ---------------------------------------------------- No valid token, continue
328:
329:
330: my $buffer;
331: $r->read($buffer,$r->header_in('Content-length'),0);
332: my @pairs=split(/&/,$buffer);
333: my $pair; my $name; my $value;
334: undef %FORM;
335: %FORM=();
336: foreach $pair (@pairs) {
337: ($name,$value) = split(/=/,$pair);
338: $value =~ tr/+/ /;
339: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
340: $FORM{$name}=$value;
341: }
342:
343: if ((!$FORM{'uname'}) || (!$FORM{'upass'}) || (!$FORM{'udom'})) {
344: failed($r,'Username, password and domain need to be specified.');
345: return OK;
346: }
347:
348: # split user logging in and "su"-user
349:
350: ($FORM{'uname'},$FORM{'suname'})=split(/\:/,$FORM{'uname'});
351: $FORM{'uname'} =~ s/\W//g;
352: $FORM{'suname'} =~ s/\W//g;
353: $FORM{'udom'} =~ s/\W//g;
354:
355: my $role = $r->dir_config('lonRole');
356: my $domain = $r->dir_config('lonDefDomain');
357: my $prodir = $r->dir_config('lonUsersDir');
358:
359: # ---------------------------------------- Get the information from login token
360:
361: my $tmpinfo=Apache::lonnet::reply('tmpget:'.$FORM{'logtoken'},
362: $FORM{'serverid'});
363:
364: if (($tmpinfo=~/^error/) || ($tmpinfo eq 'con_lost')) {
365: failed($r,'Information needed to verify your login information is missing, inaccessible or expired.');
366: return OK;
367: } else {
368: unless (&Apache::lonnet::reply('tmpdel:'.$FORM{'logtoken'},
369: $FORM{'serverid'}) eq 'ok') {
370: &failed($r,'Session could not be opened.');
371: }
372: }
373: my ($key,$firsturl)=split(/&/,$tmpinfo);
374:
375: my $keybin=pack("H16",$key);
376:
377: my $cipher;
378: if ($Crypt::DES::VERSION>=2.03) {
379: $cipher=new Crypt::DES $keybin;
380: }
381: else {
382: $cipher=new DES $keybin;
383: }
384:
385: my $upass=$cipher->decrypt(
386: unpack("a8",pack("H16",substr($FORM{'upass'},0,16))));
387:
388: $upass.=$cipher->decrypt(
389: unpack("a8",pack("H16",substr($FORM{'upass'},16,16))));
390:
391: $upass=substr($upass,1,ord(substr($upass,0,1)));
392:
393: # ---------------------------------------------------------------- Authenticate
394: my $authhost=Apache::lonnet::authenticate($FORM{'uname'},
395: $upass,
396: $FORM{'udom'});
397:
398: # --------------------------------------------------------------------- Failed?
399:
400: if ($authhost eq 'no_host') {
401: failed($r,'Username and/or password could not be authenticated.');
402: return OK;
403: }
404:
405: if (($firsturl eq '') ||
406: ($firsturl=~/^\/adm\/(logout|remote)/)) {
407: $firsturl='/adm/roles';
408: }
409: # --------------------------------- Are we attempting to login as somebody else?
410: if ($FORM{'suname'}) {
411: # ------------ see if the original user has enough privileges to pull this stunt
412: if (&Apache::lonnet::privileged($FORM{'uname'},$FORM{'udom'})) {
413: # ---------------------------------------------------- see if the su-user exists
414: unless (&Apache::lonnet::homeserver($FORM{'suname'},$FORM{'udom'})
415: eq 'no_host') {
416: &Apache::lonnet::logthis(&Apache::lonnet::homeserver($FORM{'suname'},$FORM{'udom'}));
417: # ------------------------------ see if the su-user is not too highly privileged
418: unless (&Apache::lonnet::privileged($FORM{'suname'},$FORM{'udom'})) {
419: # -------------------------------------------------------- actually switch users
420: &Apache::lonnet::logperm('User '.$FORM{'uname'}.' at '.$FORM{'udom'}.
421: ' logging in as '.$FORM{'suname'});
422: $FORM{'uname'}=$FORM{'suname'};
423: } else {
424: &Apache::lonnet::logthis('Attempted switch user to privileged user');
425: }
426: }
427: } else {
428: &Apache::lonnet::logthis('Non-privileged user attempting switch user');
429: }
430: }
431: &success($r,$FORM{'uname'},$FORM{'udom'},$authhost,$firsturl);
432: return OK;
433: }
434:
435: 1;
436: __END__
437:
438:
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