Annotation of loncom/auth/lonauth.pm, revision 1.68
1.1 albertel 1: # The LearningOnline Network
2: # User Authentication Module
1.27 www 3: #
1.68 ! albertel 4: # $Id: lonauth.pm,v 1.67 2005/06/07 02:14:28 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: #
1.1 albertel 28:
29: package Apache::lonauth;
30:
1.18 albertel 31: use strict;
1.1 albertel 32: use Apache::Constants qw(:common);
33: use Apache::File;
34: use CGI qw(:standard);
35: use CGI::Cookie();
1.26 harris41 36: use DynaLoader; # for Crypt::DES version
1.8 www 37: use Crypt::DES;
1.45 matthew 38: use Apache::loncommon();
1.66 albertel 39: use Apache::lonnet;
1.12 www 40: use Apache::lonmenu();
1.18 albertel 41: use Fcntl qw(:flock);
1.56 www 42: use Apache::lonlocal;
1.37 www 43:
44: my %FORM;
45:
1.1 albertel 46: # ------------------------------------------------------------ Successful login
47:
48: sub success {
1.6 www 49: my ($r, $username, $domain, $authhost,$lowerurl) = @_;
1.1 albertel 50: my $lonids=$r->dir_config('lonIDsDir');
1.4 www 51:
52: # See if old ID present, if so, remove
1.17 www 53:
54: my $filename;
55: opendir(DIR,$lonids);
56: while ($filename=readdir(DIR)) {
57: if ($filename=~/^$username\_\d+\_$domain\_$authhost\.id$/) {
58: unlink($lonids.'/'.$filename);
59: }
1.4 www 60: }
1.17 www 61: closedir(DIR);
1.4 www 62:
63: # Give them a new cookie
64:
1.17 www 65: my $cookie;
1.5 www 66: my $now=time;
67: $cookie="$username\_$now\_$domain\_$authhost";
68:
69: # Initialize roles
70:
71: my $userroles=Apache::lonnet::rolesinit($domain,$username,$authhost);
72:
1.7 www 73: # ------------------------------------ Check browser type and MathML capability
1.6 www 74:
1.45 matthew 75: my ($httpbrowser,$clientbrowser,$clientversion,$clientmathml,
76: $clientunicode,$clientos) = &Apache::loncommon::decode_user_agent($r);
1.6 www 77:
1.40 www 78: # -------------------------------------- Any accessibility options to remember?
79: if (($FORM{'interface'}) && ($FORM{'remember'} eq 'true')) {
1.41 albertel 80: foreach ('imagesuppress','appletsuppress',
81: 'embedsuppress','fontenhance','blackwhite') {
82: if ($FORM{$_} eq 'true') {
83: &Apache::lonnet::put('environment',{$_ => 'on'},
84: $domain,$username);
85: } else {
86: &Apache::lonnet::del('environment',[$_],$domain,$username);
87: }
88: }
89: }
1.11 www 90: # ------------------------------------------------------------- Get environment
91:
1.32 albertel 92: my $userenv;
93: my %userenv=Apache::lonnet::dump('environment',$domain,$username);
94: my ($tmp) = keys(%userenv);
95: if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
96: foreach my $key (keys(%userenv)) {
97: $userenv.="environment.$key=$userenv{$key}\n";
98: }
1.11 www 99: }
1.38 www 100: if (($userenv{'interface'}) && (!$FORM{'interface'})) {
101: $FORM{'interface'}=$userenv{'interface'};
102: }
1.66 albertel 103: $env{'environment.remote'}=$userenv{'remote'};
1.65 albertel 104: if ($userenv{'texengine'} eq 'ttm') { $clientmathml=1; }
105:
1.54 www 106: # --------------- Do not trust query string to be put directly into environment
107: foreach ('imagesuppress','appletsuppress',
108: 'embedsuppress','fontenhance','blackwhite',
109: 'interface','localpath','localres') {
110: $FORM{$_}=~s/[\n\r\=]//gs;
111: }
1.7 www 112: # --------------------------------------------------------- Write first profile
1.5 www 113:
1.41 albertel 114: {
115: my $idf=Apache::File->new(">$lonids/$cookie.id");
116: unless (flock($idf,LOCK_EX)) {
117: &Apache::lonnet::logthis("<font color=blue>WARNING: ".
118: 'Could not obtain exclusive lock in lonauth: '.$!);
119: $idf->close();
120: return 'error: '.$!;
121: }
122: if ($userenv ne '') { print $idf "$userenv\n"; }
123: print $idf "user.name=$username\n";
124: print $idf "user.domain=$domain\n";
125: print $idf "user.home=$authhost\n";
126: print $idf "browser.type=$clientbrowser\n";
127: print $idf "browser.version=$clientversion\n";
128: print $idf "browser.mathml=$clientmathml\n";
129: print $idf "browser.unicode=$clientunicode\n";
130: print $idf "browser.os=$clientos\n";
1.53 www 131: if ($FORM{'localpath'}) {
132: print $idf "browser.localpath=$FORM{'localpath'}\n";
133: print $idf "browser.localres=$FORM{'localres'}\n";
134: }
1.41 albertel 135: print $idf "request.course.fn=\n";
136: print $idf "request.course.uri=\n";
137: print $idf "request.course.sec=\n";
138: print $idf "request.role=cm\n";
1.66 albertel 139: print $idf "request.role.adv=$env{'user.adv'}\n";
1.42 www 140: print $idf "request.host=$ENV{'REMOTE_ADDR'}\n";
1.68 ! albertel 141: if ($username eq 'public' && $domain eq 'public') {
! 142: print $idf "environment.remote=off\n";
! 143: }
1.41 albertel 144: if ($FORM{'interface'}) {
145: $FORM{'interface'}=~s/\W//gs;
146: print $idf "browser.interface=$FORM{'interface'}\n";
1.66 albertel 147: $env{'browser.interface'}=$FORM{'interface'};
1.41 albertel 148: foreach ('imagesuppress','appletsuppress',
149: 'embedsuppress','fontenhance','blackwhite') {
150: if (($FORM{$_} eq 'true') ||
151: ($userenv{$_} eq 'on')) {
152: print $idf "browser.$_=on\n";
153: }
1.18 albertel 154: }
1.41 albertel 155: }
156: if ($userroles ne '') { print $idf "$userroles"; }
157: $idf->close();
158: }
1.66 albertel 159: $env{'request.role'}='cm';
160: $env{'request.role.adv'}=$env{'user.adv'};
161: $env{'browser.type'}=$clientbrowser;
1.7 www 162: # -------------------------------------------------------------------- Log this
163:
164: &Apache::lonnet::log($domain,$username,$authhost,
165: "Login $ENV{'REMOTE_ADDR'}");
1.4 www 166:
1.14 www 167: # ------------------------------------------------- Check for critical messages
168:
1.21 www 169: my @what=&Apache::lonnet::dump('critical',$domain,$username);
1.14 www 170: if ($what[0]) {
1.22 www 171: if (($what[0] ne 'con_lost') && ($what[0]!~/^error\:/)) {
1.21 www 172: $lowerurl='/adm/email?critical=display';
1.14 www 173: }
174: }
175:
1.5 www 176: # ------------------------------------------------------------ Get cookie ready
177:
1.68 ! albertel 178: if ($username eq 'public' && $domain eq 'public') {
! 179: return $cookie;
! 180: }
1.1 albertel 181: $cookie="lonID=$cookie; path=/";
1.12 www 182: # -------------------------------------------------------- Menu script and info
1.31 www 183: my $windowinfo=&Apache::lonmenu::open($clientos);
1.35 www 184: my $startupremote=&Apache::lonmenu::startupremote($lowerurl);
1.63 albertel 185: my $remoteinfo=&Apache::lonmenu::load_remote_msg($lowerurl);
1.35 www 186: my $setflags=&Apache::lonmenu::setflags();
187: my $maincall=&Apache::lonmenu::maincall();
1.52 www 188: my $bodytag=&Apache::loncommon::bodytag('Successful Login');
1.60 www 189: my $add=&addcontent();
1.64 albertel 190: my $continuelink;
1.66 albertel 191: if (($env{'browser.interface'} eq 'textual') ||
192: ($env{'environment.remote'} eq 'off')) {
1.64 albertel 193: $continuelink="<a href=\"$lowerurl\">".&mt('Continue')."</a>";
194: }
1.5 www 195: # ------------------------------------------------- Output for successful login
196:
1.1 albertel 197: $r->send_cgi_header(<<ENDHEADER);
1.60 www 198: Content-type: text/html$add
1.1 albertel 199: Set-cookie: $cookie
200:
201: ENDHEADER
1.58 www 202: my %lt=&Apache::lonlocal::texthash(
203: 'wel' => 'Welcome',
204: 'mes' => 'Welcome to the Learning<i>Online</i> Network with CAPA. Please wait while your session is being set up',
205: 'pro' => 'Problems',
206: 'log' => 'loginproblems.html',
207: );
1.1 albertel 208: $r->print(<<ENDSUCCESS);
209: <html>
210: <head>
1.4 www 211: <title>Successful Login to the LearningOnline Network with CAPA</title>
1.35 www 212: $startupremote
1.1 albertel 213: </head>
1.43 www 214: $bodytag
1.35 www 215: $setflags
1.19 www 216: $windowinfo
1.58 www 217: <h1>$lt{'wel'}</h1>
218: $lt{'mes'}.<p>
219: <a href="/adm/$lt{'log'}">$lt{'pro'}?</a></p>
1.63 albertel 220: $remoteinfo
1.35 www 221: $maincall
1.64 albertel 222: $continuelink
1.6 www 223: </body>
1.1 albertel 224: </html>
225: ENDSUCCESS
226: }
227:
228: # --------------------------------------------------------------- Failed login!
229:
230: sub failed {
231: my ($r,$message) = @_;
1.52 www 232: my $bodytag=&Apache::loncommon::bodytag('Unsuccessful Login');
1.60 www 233: my $add=&addcontent();
1.1 albertel 234: $r->send_cgi_header(<<ENDFHEADER);
1.60 www 235: Content-type: text/html$add
1.1 albertel 236:
237: ENDFHEADER
238: $r->print(<<ENDFAILED);
239: <html>
240: <head>
1.4 www 241: <title>Unsuccessful Login to the LearningOnline Network with CAPA</title>
1.1 albertel 242: </head>
1.43 www 243: $bodytag
1.1 albertel 244: <h1>Sorry ...</h1>
1.43 www 245: <p><b>$message</b></p>
1.46 matthew 246: <p>Please <a href="/adm/login?username=$FORM{'uname'}&domain=$FORM{'udom'}">log in again</a>.</p>
1.43 www 247: <p>
248: <a href="/adm/loginproblems.html">Problems?</a></p>
1.1 albertel 249: </body>
250: </html>
251: ENDFAILED
1.60 www 252: }
253:
254: # --------------------------------------------------------------------- Charset
255:
256: sub addcontent {
257: my $encoding=&Apache::lonlocal::current_encoding;
258: if ($encoding) {
259: return '; charset='.$encoding;
260: } else {
261: return '';
262: }
1.1 albertel 263: }
264:
1.55 www 265: # ------------------------------------------------------------------ Rerouting!
266:
267: sub reroute {
268: my $r=shift;
269: my $bodytag=&Apache::loncommon::bodytag('Rerouting');
270: $r->send_cgi_header(<<ENDRFHEADER);
271: Content-type: text/html
272:
273: ENDRFHEADER
274: $r->print(<<ENDRFAILED);
275: <html>
276: <head>
277: <title>Rerouting Login to the LearningOnline Network with CAPA</title>
278: </head>
279: $bodytag
280: <h1>Sorry ...</h1>
281: Please <a href="/">log in again</a>.
282: </body>
283: </html>
284: ENDRFAILED
285: }
286:
1.1 albertel 287: # ---------------------------------------------------------------- Main handler
288:
289: sub handler {
290: my $r = shift;
1.55 www 291:
292: # Are we re-routing?
293: if (-e '/home/httpd/html/lon-status/reroute.txt') {
294: &reroute($r);
295: return OK;
296: }
1.56 www 297:
1.57 www 298: &Apache::lonlocal::get_language_handle($r);
1.1 albertel 299:
1.59 www 300: # -------------------------------- Prevent users from attempting to login twice
301: my %cookies=CGI::Cookie->parse($r->header_in('Cookie'));
302: my $lonid=$cookies{'lonID'};
303: my $cookie;
304: if ($lonid) {
305: my $handle=$lonid->value;
306: $handle=~s/\W//g;
307: my $lonidsdir=$r->dir_config('lonIDsDir');
308: if ((-e "$lonidsdir/$handle.id") && ($handle ne '')) {
309: # Indeed, a valid token is found
310: $r->send_cgi_header(<<ENDFHEADER);
311: Content-type: text/html
312:
313: ENDFHEADER
314: my $bodytag=&Apache::loncommon::bodytag('Already logged in');
315: $r->print(<<ENDFAILED);
316: <html>
317: <head>
318: <title>Already logged in</title>
319: </head>
320: $bodytag
321: <h1>You are already logged in</h1>
322: <p>Please either <a href="/adm/roles">continue the current session</a> or
323: <a href="/adm/logout">logout</a>.</p>
324: <p>
325: <a href="/adm/loginproblems.html">Problems?</a></p>
326: </body>
327: </html>
328: ENDFAILED
329: return OK;
330: }
331: }
332:
333: # ---------------------------------------------------- No valid token, continue
334:
335:
1.1 albertel 336: my $buffer;
1.49 albertel 337: $r->read($buffer,$r->header_in('Content-length'),0);
1.1 albertel 338: my @pairs=split(/&/,$buffer);
1.37 www 339: my $pair; my $name; my $value;
340: undef %FORM;
341: %FORM=();
1.1 albertel 342: foreach $pair (@pairs) {
343: ($name,$value) = split(/=/,$pair);
1.7 www 344: $value =~ tr/+/ /;
345: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
1.1 albertel 346: $FORM{$name}=$value;
347: }
348:
1.67 www 349: if ((!$FORM{'uname'}) || (!$FORM{'upass0'}) || (!$FORM{'udom'})) {
1.43 www 350: failed($r,'Username, password and domain need to be specified.');
1.1 albertel 351: return OK;
352: }
1.61 www 353:
354: # split user logging in and "su"-user
355:
356: ($FORM{'uname'},$FORM{'suname'})=split(/\:/,$FORM{'uname'});
1.1 albertel 357: $FORM{'uname'} =~ s/\W//g;
1.61 www 358: $FORM{'suname'} =~ s/\W//g;
1.1 albertel 359: $FORM{'udom'} =~ s/\W//g;
360:
361: my $role = $r->dir_config('lonRole');
362: my $domain = $r->dir_config('lonDefDomain');
363: my $prodir = $r->dir_config('lonUsersDir');
364:
1.8 www 365: # ---------------------------------------- Get the information from login token
366:
367: my $tmpinfo=Apache::lonnet::reply('tmpget:'.$FORM{'logtoken'},
368: $FORM{'serverid'});
369:
370: if (($tmpinfo=~/^error/) || ($tmpinfo eq 'con_lost')) {
1.43 www 371: failed($r,'Information needed to verify your login information is missing, inaccessible or expired.');
1.8 www 372: return OK;
1.44 www 373: } else {
374: unless (&Apache::lonnet::reply('tmpdel:'.$FORM{'logtoken'},
375: $FORM{'serverid'}) eq 'ok') {
376: &failed($r,'Session could not be opened.');
377: }
1.8 www 378: }
1.9 www 379: my ($key,$firsturl)=split(/&/,$tmpinfo);
1.8 www 380:
381: my $keybin=pack("H16",$key);
382:
1.26 harris41 383: my $cipher;
384: if ($Crypt::DES::VERSION>=2.03) {
385: $cipher=new Crypt::DES $keybin;
386: }
387: else {
388: $cipher=new DES $keybin;
389: }
1.67 www 390: my $upass='';
391: for (my $i=0;$i<=2;$i++) {
392: my $chunk=
393: $cipher->decrypt(unpack("a8",pack("H16",substr($FORM{'upass'.$i},0,16))));
1.8 www 394:
1.67 www 395: $chunk.=
396: $cipher->decrypt(unpack("a8",pack("H16",substr($FORM{'upass'.$i},16,16))));
1.8 www 397:
1.67 www 398: $chunk=substr($chunk,1,ord(substr($chunk,0,1)));
399: $upass.=$chunk;
400: }
1.8 www 401:
1.1 albertel 402: # ---------------------------------------------------------------- Authenticate
403: my $authhost=Apache::lonnet::authenticate($FORM{'uname'},
1.8 www 404: $upass,
1.1 albertel 405: $FORM{'udom'});
406:
407: # --------------------------------------------------------------------- Failed?
408:
409: if ($authhost eq 'no_host') {
1.43 www 410: failed($r,'Username and/or password could not be authenticated.');
1.1 albertel 411: return OK;
412: }
413:
1.59 www 414: if (($firsturl eq '') ||
415: ($firsturl=~/^\/adm\/(logout|remote)/)) {
1.24 www 416: $firsturl='/adm/roles';
1.7 www 417: }
1.61 www 418: # --------------------------------- Are we attempting to login as somebody else?
419: if ($FORM{'suname'}) {
420: # ------------ see if the original user has enough privileges to pull this stunt
421: if (&Apache::lonnet::privileged($FORM{'uname'},$FORM{'udom'})) {
422: # ---------------------------------------------------- see if the su-user exists
423: unless (&Apache::lonnet::homeserver($FORM{'suname'},$FORM{'udom'})
424: eq 'no_host') {
425: &Apache::lonnet::logthis(&Apache::lonnet::homeserver($FORM{'suname'},$FORM{'udom'}));
426: # ------------------------------ see if the su-user is not too highly privileged
427: unless (&Apache::lonnet::privileged($FORM{'suname'},$FORM{'udom'})) {
428: # -------------------------------------------------------- actually switch users
429: &Apache::lonnet::logperm('User '.$FORM{'uname'}.' at '.$FORM{'udom'}.
430: ' logging in as '.$FORM{'suname'});
431: $FORM{'uname'}=$FORM{'suname'};
432: } else {
433: &Apache::lonnet::logthis('Attempted switch user to privileged user');
434: }
435: }
436: } else {
437: &Apache::lonnet::logthis('Non-privileged user attempting switch user');
438: }
439: }
440: &success($r,$FORM{'uname'},$FORM{'udom'},$authhost,$firsturl);
1.1 albertel 441: return OK;
442: }
443:
444: 1;
445: __END__
1.7 www 446:
447:
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