Annotation of loncom/auth/lonauth.pm, revision 1.62
1.1 albertel 1: # The LearningOnline Network
2: # User Authentication Module
1.27 www 3: #
1.62 ! albertel 4: # $Id: lonauth.pm,v 1.61 2004/01/13 16:29:40 www Exp $
1.27 www 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: #
1.2 www 28: # 5/21/99,5/22,5/25,5/26,5/27,5/29,6/2,6/11,6/14,6/15
1.4 www 29: # 16/11,12/16,
1.9 www 30: # 1/14,2/24,2/28,2/29,3/7,5/29,5/30,5/31,6/1,6/5,6/29,
1.19 www 31: # 7/1,7/10,10/2,10/5,10/9,10/26,10/30,11/10,
32: # 05/28,05/29 Gerd Kortemeyer
1.22 www 33: # 07/28,08/03 Gerd Kortemeyer
1.24 www 34: # 8/20 Gerd Kortemeyer
1.1 albertel 35:
36: package Apache::lonauth;
37:
1.18 albertel 38: use strict;
1.1 albertel 39: use Apache::Constants qw(:common);
40: use Apache::File;
41: use CGI qw(:standard);
42: use CGI::Cookie();
1.26 harris41 43: use DynaLoader; # for Crypt::DES version
1.8 www 44: use Crypt::DES;
1.45 matthew 45: use Apache::loncommon();
1.1 albertel 46: use Apache::lonnet();
1.12 www 47: use Apache::lonmenu();
1.18 albertel 48: use Fcntl qw(:flock);
1.56 www 49: use Apache::lonlocal;
1.37 www 50:
51: my %FORM;
52:
1.1 albertel 53: # ------------------------------------------------------------ Successful login
54:
55: sub success {
1.6 www 56: my ($r, $username, $domain, $authhost,$lowerurl) = @_;
1.1 albertel 57: my $lonids=$r->dir_config('lonIDsDir');
1.4 www 58:
59: # See if old ID present, if so, remove
1.17 www 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: }
1.4 www 67: }
1.17 www 68: closedir(DIR);
1.4 www 69:
70: # Give them a new cookie
71:
1.17 www 72: my $cookie;
1.5 www 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:
1.7 www 80: # ------------------------------------ Check browser type and MathML capability
1.6 www 81:
1.45 matthew 82: my ($httpbrowser,$clientbrowser,$clientversion,$clientmathml,
83: $clientunicode,$clientos) = &Apache::loncommon::decode_user_agent($r);
1.6 www 84:
1.40 www 85: # -------------------------------------- Any accessibility options to remember?
86: if (($FORM{'interface'}) && ($FORM{'remember'} eq 'true')) {
1.41 albertel 87: foreach ('imagesuppress','appletsuppress',
88: 'embedsuppress','fontenhance','blackwhite') {
89: if ($FORM{$_} eq 'true') {
90: &Apache::lonnet::put('environment',{$_ => 'on'},
91: $domain,$username);
92: } else {
93: &Apache::lonnet::del('environment',[$_],$domain,$username);
94: }
95: }
96: }
1.11 www 97: # ------------------------------------------------------------- Get environment
98:
1.32 albertel 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: }
1.11 www 106: }
1.38 www 107: if (($userenv{'interface'}) && (!$FORM{'interface'})) {
108: $FORM{'interface'}=$userenv{'interface'};
109: }
1.47 www 110: $ENV{'environment.remote'}=$userenv{'remote'};
1.54 www 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: }
1.7 www 117: # --------------------------------------------------------- Write first profile
1.5 www 118:
1.41 albertel 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";
1.53 www 136: if ($FORM{'localpath'}) {
137: print $idf "browser.localpath=$FORM{'localpath'}\n";
138: print $idf "browser.localres=$FORM{'localres'}\n";
139: }
1.41 albertel 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";
1.48 www 144: print $idf "request.role.adv=$ENV{'user.adv'}\n";
1.42 www 145: print $idf "request.host=$ENV{'REMOTE_ADDR'}\n";
1.41 albertel 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: }
1.18 albertel 156: }
1.41 albertel 157: }
158: if ($userroles ne '') { print $idf "$userroles"; }
159: $idf->close();
160: }
161: $ENV{'request.role'}='cm';
1.48 www 162: $ENV{'request.role.adv'}=$ENV{'user.adv'};
1.41 albertel 163: $ENV{'browser.type'}=$clientbrowser;
1.7 www 164: # -------------------------------------------------------------------- Log this
165:
166: &Apache::lonnet::log($domain,$username,$authhost,
167: "Login $ENV{'REMOTE_ADDR'}");
1.4 www 168:
1.14 www 169: # ------------------------------------------------- Check for critical messages
170:
1.21 www 171: my @what=&Apache::lonnet::dump('critical',$domain,$username);
1.14 www 172: if ($what[0]) {
1.22 www 173: if (($what[0] ne 'con_lost') && ($what[0]!~/^error\:/)) {
1.21 www 174: $lowerurl='/adm/email?critical=display';
1.14 www 175: }
176: }
177:
1.5 www 178: # ------------------------------------------------------------ Get cookie ready
179:
1.1 albertel 180: $cookie="lonID=$cookie; path=/";
1.12 www 181: # -------------------------------------------------------- Menu script and info
1.31 www 182: my $windowinfo=&Apache::lonmenu::open($clientos);
1.35 www 183: my $startupremote=&Apache::lonmenu::startupremote($lowerurl);
184: my $setflags=&Apache::lonmenu::setflags();
185: my $maincall=&Apache::lonmenu::maincall();
1.52 www 186: my $bodytag=&Apache::loncommon::bodytag('Successful Login');
1.60 www 187: my $add=&addcontent();
1.5 www 188: # ------------------------------------------------- Output for successful login
189:
1.1 albertel 190: $r->send_cgi_header(<<ENDHEADER);
1.60 www 191: Content-type: text/html$add
1.1 albertel 192: Set-cookie: $cookie
193:
194: ENDHEADER
1.58 www 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: );
1.1 albertel 201: $r->print(<<ENDSUCCESS);
202: <html>
203: <head>
1.4 www 204: <title>Successful Login to the LearningOnline Network with CAPA</title>
1.35 www 205: $startupremote
1.1 albertel 206: </head>
1.43 www 207: $bodytag
1.35 www 208: $setflags
1.19 www 209: $windowinfo
1.58 www 210: <h1>$lt{'wel'}</h1>
211: $lt{'mes'}.<p>
212: <a href="/adm/$lt{'log'}">$lt{'pro'}?</a></p>
1.35 www 213: $maincall
1.6 www 214: </body>
1.1 albertel 215: </html>
216: ENDSUCCESS
217: }
218:
219: # --------------------------------------------------------------- Failed login!
220:
221: sub failed {
222: my ($r,$message) = @_;
1.52 www 223: my $bodytag=&Apache::loncommon::bodytag('Unsuccessful Login');
1.60 www 224: my $add=&addcontent();
1.1 albertel 225: $r->send_cgi_header(<<ENDFHEADER);
1.60 www 226: Content-type: text/html$add
1.1 albertel 227:
228: ENDFHEADER
229: $r->print(<<ENDFAILED);
230: <html>
231: <head>
1.4 www 232: <title>Unsuccessful Login to the LearningOnline Network with CAPA</title>
1.1 albertel 233: </head>
1.43 www 234: $bodytag
1.1 albertel 235: <h1>Sorry ...</h1>
1.43 www 236: <p><b>$message</b></p>
1.46 matthew 237: <p>Please <a href="/adm/login?username=$FORM{'uname'}&domain=$FORM{'udom'}">log in again</a>.</p>
1.43 www 238: <p>
239: <a href="/adm/loginproblems.html">Problems?</a></p>
1.1 albertel 240: </body>
241: </html>
242: ENDFAILED
1.60 www 243: }
244:
245: # --------------------------------------------------------------------- Charset
246:
247: sub addcontent {
248: my $encoding=&Apache::lonlocal::current_encoding;
249: if ($encoding) {
250: return '; charset='.$encoding;
251: } else {
252: return '';
253: }
1.1 albertel 254: }
255:
1.55 www 256: # ------------------------------------------------------------------ Rerouting!
257:
258: sub reroute {
259: my $r=shift;
260: my $bodytag=&Apache::loncommon::bodytag('Rerouting');
261: $r->send_cgi_header(<<ENDRFHEADER);
262: Content-type: text/html
263:
264: ENDRFHEADER
265: $r->print(<<ENDRFAILED);
266: <html>
267: <head>
268: <title>Rerouting Login to the LearningOnline Network with CAPA</title>
269: </head>
270: $bodytag
271: <h1>Sorry ...</h1>
272: Please <a href="/">log in again</a>.
273: </body>
274: </html>
275: ENDRFAILED
276: }
277:
1.1 albertel 278: # ---------------------------------------------------------------- Main handler
279:
280: sub handler {
281: my $r = shift;
1.55 www 282:
283: # Are we re-routing?
284: if (-e '/home/httpd/html/lon-status/reroute.txt') {
285: &reroute($r);
286: return OK;
287: }
1.56 www 288:
1.57 www 289: &Apache::lonlocal::get_language_handle($r);
1.1 albertel 290:
1.59 www 291: # -------------------------------- Prevent users from attempting to login twice
292: my %cookies=CGI::Cookie->parse($r->header_in('Cookie'));
293: my $lonid=$cookies{'lonID'};
294: my $cookie;
295: if ($lonid) {
296: my $handle=$lonid->value;
297: $handle=~s/\W//g;
298: my $lonidsdir=$r->dir_config('lonIDsDir');
299: if ((-e "$lonidsdir/$handle.id") && ($handle ne '')) {
300: # Indeed, a valid token is found
301: $r->send_cgi_header(<<ENDFHEADER);
302: Content-type: text/html
303:
304: ENDFHEADER
305: my $bodytag=&Apache::loncommon::bodytag('Already logged in');
306: $r->print(<<ENDFAILED);
307: <html>
308: <head>
309: <title>Already logged in</title>
310: </head>
311: $bodytag
312: <h1>You are already logged in</h1>
313: <p>Please either <a href="/adm/roles">continue the current session</a> or
314: <a href="/adm/logout">logout</a>.</p>
315: <p>
316: <a href="/adm/loginproblems.html">Problems?</a></p>
317: </body>
318: </html>
319: ENDFAILED
320: return OK;
321: }
322: }
323:
324: # ---------------------------------------------------- No valid token, continue
325:
326:
1.1 albertel 327: my $buffer;
1.49 albertel 328: $r->read($buffer,$r->header_in('Content-length'),0);
1.1 albertel 329: my @pairs=split(/&/,$buffer);
1.37 www 330: my $pair; my $name; my $value;
331: undef %FORM;
332: %FORM=();
1.1 albertel 333: foreach $pair (@pairs) {
334: ($name,$value) = split(/=/,$pair);
1.7 www 335: $value =~ tr/+/ /;
336: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
1.1 albertel 337: $FORM{$name}=$value;
338: }
339:
340: if ((!$FORM{'uname'}) || (!$FORM{'upass'}) || (!$FORM{'udom'})) {
1.43 www 341: failed($r,'Username, password and domain need to be specified.');
1.1 albertel 342: return OK;
343: }
1.61 www 344:
345: # split user logging in and "su"-user
346:
347: ($FORM{'uname'},$FORM{'suname'})=split(/\:/,$FORM{'uname'});
1.1 albertel 348: $FORM{'uname'} =~ s/\W//g;
1.61 www 349: $FORM{'suname'} =~ s/\W//g;
1.1 albertel 350: $FORM{'udom'} =~ s/\W//g;
351:
352: my $role = $r->dir_config('lonRole');
353: my $domain = $r->dir_config('lonDefDomain');
354: my $prodir = $r->dir_config('lonUsersDir');
355:
1.8 www 356: # ---------------------------------------- Get the information from login token
357:
358: my $tmpinfo=Apache::lonnet::reply('tmpget:'.$FORM{'logtoken'},
359: $FORM{'serverid'});
360:
361: if (($tmpinfo=~/^error/) || ($tmpinfo eq 'con_lost')) {
1.43 www 362: failed($r,'Information needed to verify your login information is missing, inaccessible or expired.');
1.8 www 363: return OK;
1.44 www 364: } else {
365: unless (&Apache::lonnet::reply('tmpdel:'.$FORM{'logtoken'},
366: $FORM{'serverid'}) eq 'ok') {
367: &failed($r,'Session could not be opened.');
368: }
1.8 www 369: }
1.9 www 370: my ($key,$firsturl)=split(/&/,$tmpinfo);
1.8 www 371:
372: my $keybin=pack("H16",$key);
373:
1.26 harris41 374: my $cipher;
375: if ($Crypt::DES::VERSION>=2.03) {
376: $cipher=new Crypt::DES $keybin;
377: }
378: else {
379: $cipher=new DES $keybin;
380: }
1.8 www 381:
382: my $upass=$cipher->decrypt(
383: unpack("a8",pack("H16",substr($FORM{'upass'},0,16))));
384:
385: $upass.=$cipher->decrypt(
386: unpack("a8",pack("H16",substr($FORM{'upass'},16,16))));
387:
388: $upass=substr($upass,1,ord(substr($upass,0,1)));
389:
1.1 albertel 390: # ---------------------------------------------------------------- Authenticate
391: my $authhost=Apache::lonnet::authenticate($FORM{'uname'},
1.8 www 392: $upass,
1.1 albertel 393: $FORM{'udom'});
394:
395: # --------------------------------------------------------------------- Failed?
396:
397: if ($authhost eq 'no_host') {
1.43 www 398: failed($r,'Username and/or password could not be authenticated.');
1.1 albertel 399: return OK;
400: }
401:
1.59 www 402: if (($firsturl eq '') ||
403: ($firsturl=~/^\/adm\/(logout|remote)/)) {
1.24 www 404: $firsturl='/adm/roles';
1.7 www 405: }
1.61 www 406: # --------------------------------- Are we attempting to login as somebody else?
407: if ($FORM{'suname'}) {
408: # ------------ see if the original user has enough privileges to pull this stunt
409: if (&Apache::lonnet::privileged($FORM{'uname'},$FORM{'udom'})) {
410: # ---------------------------------------------------- see if the su-user exists
411: unless (&Apache::lonnet::homeserver($FORM{'suname'},$FORM{'udom'})
412: eq 'no_host') {
413: &Apache::lonnet::logthis(&Apache::lonnet::homeserver($FORM{'suname'},$FORM{'udom'}));
414: # ------------------------------ see if the su-user is not too highly privileged
415: unless (&Apache::lonnet::privileged($FORM{'suname'},$FORM{'udom'})) {
416: # -------------------------------------------------------- actually switch users
417: &Apache::lonnet::logperm('User '.$FORM{'uname'}.' at '.$FORM{'udom'}.
418: ' logging in as '.$FORM{'suname'});
419: $FORM{'uname'}=$FORM{'suname'};
420: } else {
421: &Apache::lonnet::logthis('Attempted switch user to privileged user');
422: }
423: }
424: } else {
425: &Apache::lonnet::logthis('Non-privileged user attempting switch user');
426: }
427: }
428: &success($r,$FORM{'uname'},$FORM{'udom'},$authhost,$firsturl);
1.1 albertel 429: return OK;
430: }
431:
432: 1;
433: __END__
1.7 www 434:
435:
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