1: # The LearningOnline Network
2: # User Authentication Module
3: #
4: # $Id: lonauth.pm,v 1.64 2005/02/07 20:33:04 albertel 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 $remoteinfo=&Apache::lonmenu::load_remote_msg($lowerurl);
185: my $setflags=&Apache::lonmenu::setflags();
186: my $maincall=&Apache::lonmenu::maincall();
187: my $bodytag=&Apache::loncommon::bodytag('Successful Login');
188: my $add=&addcontent();
189: my $continuelink;
190: if (($ENV{'browser.interface'} eq 'textual') ||
191: ($ENV{'environment.remote'} eq 'off')) {
192: $continuelink="<a href=\"$lowerurl\">".&mt('Continue')."</a>";
193: }
194: # ------------------------------------------------- Output for successful login
195:
196: $r->send_cgi_header(<<ENDHEADER);
197: Content-type: text/html$add
198: Set-cookie: $cookie
199:
200: ENDHEADER
201: my %lt=&Apache::lonlocal::texthash(
202: 'wel' => 'Welcome',
203: 'mes' => 'Welcome to the Learning<i>Online</i> Network with CAPA. Please wait while your session is being set up',
204: 'pro' => 'Problems',
205: 'log' => 'loginproblems.html',
206: );
207: $r->print(<<ENDSUCCESS);
208: <html>
209: <head>
210: <title>Successful Login to the LearningOnline Network with CAPA</title>
211: $startupremote
212: </head>
213: $bodytag
214: $setflags
215: $windowinfo
216: <h1>$lt{'wel'}</h1>
217: $lt{'mes'}.<p>
218: <a href="/adm/$lt{'log'}">$lt{'pro'}?</a></p>
219: $remoteinfo
220: $maincall
221: $continuelink
222: </body>
223: </html>
224: ENDSUCCESS
225: }
226:
227: # --------------------------------------------------------------- Failed login!
228:
229: sub failed {
230: my ($r,$message) = @_;
231: my $bodytag=&Apache::loncommon::bodytag('Unsuccessful Login');
232: my $add=&addcontent();
233: $r->send_cgi_header(<<ENDFHEADER);
234: Content-type: text/html$add
235:
236: ENDFHEADER
237: $r->print(<<ENDFAILED);
238: <html>
239: <head>
240: <title>Unsuccessful Login to the LearningOnline Network with CAPA</title>
241: </head>
242: $bodytag
243: <h1>Sorry ...</h1>
244: <p><b>$message</b></p>
245: <p>Please <a href="/adm/login?username=$FORM{'uname'}&domain=$FORM{'udom'}">log in again</a>.</p>
246: <p>
247: <a href="/adm/loginproblems.html">Problems?</a></p>
248: </body>
249: </html>
250: ENDFAILED
251: }
252:
253: # --------------------------------------------------------------------- Charset
254:
255: sub addcontent {
256: my $encoding=&Apache::lonlocal::current_encoding;
257: if ($encoding) {
258: return '; charset='.$encoding;
259: } else {
260: return '';
261: }
262: }
263:
264: # ------------------------------------------------------------------ Rerouting!
265:
266: sub reroute {
267: my $r=shift;
268: my $bodytag=&Apache::loncommon::bodytag('Rerouting');
269: $r->send_cgi_header(<<ENDRFHEADER);
270: Content-type: text/html
271:
272: ENDRFHEADER
273: $r->print(<<ENDRFAILED);
274: <html>
275: <head>
276: <title>Rerouting Login to the LearningOnline Network with CAPA</title>
277: </head>
278: $bodytag
279: <h1>Sorry ...</h1>
280: Please <a href="/">log in again</a>.
281: </body>
282: </html>
283: ENDRFAILED
284: }
285:
286: # ---------------------------------------------------------------- Main handler
287:
288: sub handler {
289: my $r = shift;
290:
291: # Are we re-routing?
292: if (-e '/home/httpd/html/lon-status/reroute.txt') {
293: &reroute($r);
294: return OK;
295: }
296:
297: &Apache::lonlocal::get_language_handle($r);
298:
299: # -------------------------------- Prevent users from attempting to login twice
300: my %cookies=CGI::Cookie->parse($r->header_in('Cookie'));
301: my $lonid=$cookies{'lonID'};
302: my $cookie;
303: if ($lonid) {
304: my $handle=$lonid->value;
305: $handle=~s/\W//g;
306: my $lonidsdir=$r->dir_config('lonIDsDir');
307: if ((-e "$lonidsdir/$handle.id") && ($handle ne '')) {
308: # Indeed, a valid token is found
309: $r->send_cgi_header(<<ENDFHEADER);
310: Content-type: text/html
311:
312: ENDFHEADER
313: my $bodytag=&Apache::loncommon::bodytag('Already logged in');
314: $r->print(<<ENDFAILED);
315: <html>
316: <head>
317: <title>Already logged in</title>
318: </head>
319: $bodytag
320: <h1>You are already logged in</h1>
321: <p>Please either <a href="/adm/roles">continue the current session</a> or
322: <a href="/adm/logout">logout</a>.</p>
323: <p>
324: <a href="/adm/loginproblems.html">Problems?</a></p>
325: </body>
326: </html>
327: ENDFAILED
328: return OK;
329: }
330: }
331:
332: # ---------------------------------------------------- No valid token, continue
333:
334:
335: my $buffer;
336: $r->read($buffer,$r->header_in('Content-length'),0);
337: my @pairs=split(/&/,$buffer);
338: my $pair; my $name; my $value;
339: undef %FORM;
340: %FORM=();
341: foreach $pair (@pairs) {
342: ($name,$value) = split(/=/,$pair);
343: $value =~ tr/+/ /;
344: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
345: $FORM{$name}=$value;
346: }
347:
348: if ((!$FORM{'uname'}) || (!$FORM{'upass'}) || (!$FORM{'udom'})) {
349: failed($r,'Username, password and domain need to be specified.');
350: return OK;
351: }
352:
353: # split user logging in and "su"-user
354:
355: ($FORM{'uname'},$FORM{'suname'})=split(/\:/,$FORM{'uname'});
356: $FORM{'uname'} =~ s/\W//g;
357: $FORM{'suname'} =~ s/\W//g;
358: $FORM{'udom'} =~ s/\W//g;
359:
360: my $role = $r->dir_config('lonRole');
361: my $domain = $r->dir_config('lonDefDomain');
362: my $prodir = $r->dir_config('lonUsersDir');
363:
364: # ---------------------------------------- Get the information from login token
365:
366: my $tmpinfo=Apache::lonnet::reply('tmpget:'.$FORM{'logtoken'},
367: $FORM{'serverid'});
368:
369: if (($tmpinfo=~/^error/) || ($tmpinfo eq 'con_lost')) {
370: failed($r,'Information needed to verify your login information is missing, inaccessible or expired.');
371: return OK;
372: } else {
373: unless (&Apache::lonnet::reply('tmpdel:'.$FORM{'logtoken'},
374: $FORM{'serverid'}) eq 'ok') {
375: &failed($r,'Session could not be opened.');
376: }
377: }
378: my ($key,$firsturl)=split(/&/,$tmpinfo);
379:
380: my $keybin=pack("H16",$key);
381:
382: my $cipher;
383: if ($Crypt::DES::VERSION>=2.03) {
384: $cipher=new Crypt::DES $keybin;
385: }
386: else {
387: $cipher=new DES $keybin;
388: }
389:
390: my $upass=$cipher->decrypt(
391: unpack("a8",pack("H16",substr($FORM{'upass'},0,16))));
392:
393: $upass.=$cipher->decrypt(
394: unpack("a8",pack("H16",substr($FORM{'upass'},16,16))));
395:
396: $upass=substr($upass,1,ord(substr($upass,0,1)));
397:
398: # ---------------------------------------------------------------- Authenticate
399: my $authhost=Apache::lonnet::authenticate($FORM{'uname'},
400: $upass,
401: $FORM{'udom'});
402:
403: # --------------------------------------------------------------------- Failed?
404:
405: if ($authhost eq 'no_host') {
406: failed($r,'Username and/or password could not be authenticated.');
407: return OK;
408: }
409:
410: if (($firsturl eq '') ||
411: ($firsturl=~/^\/adm\/(logout|remote)/)) {
412: $firsturl='/adm/roles';
413: }
414: # --------------------------------- Are we attempting to login as somebody else?
415: if ($FORM{'suname'}) {
416: # ------------ see if the original user has enough privileges to pull this stunt
417: if (&Apache::lonnet::privileged($FORM{'uname'},$FORM{'udom'})) {
418: # ---------------------------------------------------- see if the su-user exists
419: unless (&Apache::lonnet::homeserver($FORM{'suname'},$FORM{'udom'})
420: eq 'no_host') {
421: &Apache::lonnet::logthis(&Apache::lonnet::homeserver($FORM{'suname'},$FORM{'udom'}));
422: # ------------------------------ see if the su-user is not too highly privileged
423: unless (&Apache::lonnet::privileged($FORM{'suname'},$FORM{'udom'})) {
424: # -------------------------------------------------------- actually switch users
425: &Apache::lonnet::logperm('User '.$FORM{'uname'}.' at '.$FORM{'udom'}.
426: ' logging in as '.$FORM{'suname'});
427: $FORM{'uname'}=$FORM{'suname'};
428: } else {
429: &Apache::lonnet::logthis('Attempted switch user to privileged user');
430: }
431: }
432: } else {
433: &Apache::lonnet::logthis('Non-privileged user attempting switch user');
434: }
435: }
436: &success($r,$FORM{'uname'},$FORM{'udom'},$authhost,$firsturl);
437: return OK;
438: }
439:
440: 1;
441: __END__
442:
443:
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>
![[BACK]](/icons/back.gif){kind=icon}
Return to lonauth.pm CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [LON-CAPA] / loncom / auth