Annotation of loncom/auth/lonauth.pm, revision 1.65
1.1 albertel 1: # The LearningOnline Network
2: # User Authentication Module
1.27 www 3: #
1.65 ! albertel 4: # $Id: lonauth.pm,v 1.64 2005/02/07 20:33:04 albertel 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'};
1.65 ! albertel 111: if ($userenv{'texengine'} eq 'ttm') { $clientmathml=1; }
! 112:
1.54 www 113: # --------------- Do not trust query string to be put directly into environment
114: foreach ('imagesuppress','appletsuppress',
115: 'embedsuppress','fontenhance','blackwhite',
116: 'interface','localpath','localres') {
117: $FORM{$_}=~s/[\n\r\=]//gs;
118: }
1.7 www 119: # --------------------------------------------------------- Write first profile
1.5 www 120:
1.41 albertel 121: {
122: my $idf=Apache::File->new(">$lonids/$cookie.id");
123: unless (flock($idf,LOCK_EX)) {
124: &Apache::lonnet::logthis("<font color=blue>WARNING: ".
125: 'Could not obtain exclusive lock in lonauth: '.$!);
126: $idf->close();
127: return 'error: '.$!;
128: }
129: if ($userenv ne '') { print $idf "$userenv\n"; }
130: print $idf "user.name=$username\n";
131: print $idf "user.domain=$domain\n";
132: print $idf "user.home=$authhost\n";
133: print $idf "browser.type=$clientbrowser\n";
134: print $idf "browser.version=$clientversion\n";
135: print $idf "browser.mathml=$clientmathml\n";
136: print $idf "browser.unicode=$clientunicode\n";
137: print $idf "browser.os=$clientos\n";
1.53 www 138: if ($FORM{'localpath'}) {
139: print $idf "browser.localpath=$FORM{'localpath'}\n";
140: print $idf "browser.localres=$FORM{'localres'}\n";
141: }
1.41 albertel 142: print $idf "request.course.fn=\n";
143: print $idf "request.course.uri=\n";
144: print $idf "request.course.sec=\n";
145: print $idf "request.role=cm\n";
1.48 www 146: print $idf "request.role.adv=$ENV{'user.adv'}\n";
1.42 www 147: print $idf "request.host=$ENV{'REMOTE_ADDR'}\n";
1.41 albertel 148: if ($FORM{'interface'}) {
149: $FORM{'interface'}=~s/\W//gs;
150: print $idf "browser.interface=$FORM{'interface'}\n";
151: $ENV{'browser.interface'}=$FORM{'interface'};
152: foreach ('imagesuppress','appletsuppress',
153: 'embedsuppress','fontenhance','blackwhite') {
154: if (($FORM{$_} eq 'true') ||
155: ($userenv{$_} eq 'on')) {
156: print $idf "browser.$_=on\n";
157: }
1.18 albertel 158: }
1.41 albertel 159: }
160: if ($userroles ne '') { print $idf "$userroles"; }
161: $idf->close();
162: }
163: $ENV{'request.role'}='cm';
1.48 www 164: $ENV{'request.role.adv'}=$ENV{'user.adv'};
1.41 albertel 165: $ENV{'browser.type'}=$clientbrowser;
1.7 www 166: # -------------------------------------------------------------------- Log this
167:
168: &Apache::lonnet::log($domain,$username,$authhost,
169: "Login $ENV{'REMOTE_ADDR'}");
1.4 www 170:
1.14 www 171: # ------------------------------------------------- Check for critical messages
172:
1.21 www 173: my @what=&Apache::lonnet::dump('critical',$domain,$username);
1.14 www 174: if ($what[0]) {
1.22 www 175: if (($what[0] ne 'con_lost') && ($what[0]!~/^error\:/)) {
1.21 www 176: $lowerurl='/adm/email?critical=display';
1.14 www 177: }
178: }
179:
1.5 www 180: # ------------------------------------------------------------ Get cookie ready
181:
1.1 albertel 182: $cookie="lonID=$cookie; path=/";
1.12 www 183: # -------------------------------------------------------- Menu script and info
1.31 www 184: my $windowinfo=&Apache::lonmenu::open($clientos);
1.35 www 185: my $startupremote=&Apache::lonmenu::startupremote($lowerurl);
1.63 albertel 186: my $remoteinfo=&Apache::lonmenu::load_remote_msg($lowerurl);
1.35 www 187: my $setflags=&Apache::lonmenu::setflags();
188: my $maincall=&Apache::lonmenu::maincall();
1.52 www 189: my $bodytag=&Apache::loncommon::bodytag('Successful Login');
1.60 www 190: my $add=&addcontent();
1.64 albertel 191: my $continuelink;
192: if (($ENV{'browser.interface'} eq 'textual') ||
193: ($ENV{'environment.remote'} eq 'off')) {
194: $continuelink="<a href=\"$lowerurl\">".&mt('Continue')."</a>";
195: }
1.5 www 196: # ------------------------------------------------- Output for successful login
197:
1.1 albertel 198: $r->send_cgi_header(<<ENDHEADER);
1.60 www 199: Content-type: text/html$add
1.1 albertel 200: Set-cookie: $cookie
201:
202: ENDHEADER
1.58 www 203: my %lt=&Apache::lonlocal::texthash(
204: 'wel' => 'Welcome',
205: 'mes' => 'Welcome to the Learning<i>Online</i> Network with CAPA. Please wait while your session is being set up',
206: 'pro' => 'Problems',
207: 'log' => 'loginproblems.html',
208: );
1.1 albertel 209: $r->print(<<ENDSUCCESS);
210: <html>
211: <head>
1.4 www 212: <title>Successful Login to the LearningOnline Network with CAPA</title>
1.35 www 213: $startupremote
1.1 albertel 214: </head>
1.43 www 215: $bodytag
1.35 www 216: $setflags
1.19 www 217: $windowinfo
1.58 www 218: <h1>$lt{'wel'}</h1>
219: $lt{'mes'}.<p>
220: <a href="/adm/$lt{'log'}">$lt{'pro'}?</a></p>
1.63 albertel 221: $remoteinfo
1.35 www 222: $maincall
1.64 albertel 223: $continuelink
1.6 www 224: </body>
1.1 albertel 225: </html>
226: ENDSUCCESS
227: }
228:
229: # --------------------------------------------------------------- Failed login!
230:
231: sub failed {
232: my ($r,$message) = @_;
1.52 www 233: my $bodytag=&Apache::loncommon::bodytag('Unsuccessful Login');
1.60 www 234: my $add=&addcontent();
1.1 albertel 235: $r->send_cgi_header(<<ENDFHEADER);
1.60 www 236: Content-type: text/html$add
1.1 albertel 237:
238: ENDFHEADER
239: $r->print(<<ENDFAILED);
240: <html>
241: <head>
1.4 www 242: <title>Unsuccessful Login to the LearningOnline Network with CAPA</title>
1.1 albertel 243: </head>
1.43 www 244: $bodytag
1.1 albertel 245: <h1>Sorry ...</h1>
1.43 www 246: <p><b>$message</b></p>
1.46 matthew 247: <p>Please <a href="/adm/login?username=$FORM{'uname'}&domain=$FORM{'udom'}">log in again</a>.</p>
1.43 www 248: <p>
249: <a href="/adm/loginproblems.html">Problems?</a></p>
1.1 albertel 250: </body>
251: </html>
252: ENDFAILED
1.60 www 253: }
254:
255: # --------------------------------------------------------------------- Charset
256:
257: sub addcontent {
258: my $encoding=&Apache::lonlocal::current_encoding;
259: if ($encoding) {
260: return '; charset='.$encoding;
261: } else {
262: return '';
263: }
1.1 albertel 264: }
265:
1.55 www 266: # ------------------------------------------------------------------ Rerouting!
267:
268: sub reroute {
269: my $r=shift;
270: my $bodytag=&Apache::loncommon::bodytag('Rerouting');
271: $r->send_cgi_header(<<ENDRFHEADER);
272: Content-type: text/html
273:
274: ENDRFHEADER
275: $r->print(<<ENDRFAILED);
276: <html>
277: <head>
278: <title>Rerouting Login to the LearningOnline Network with CAPA</title>
279: </head>
280: $bodytag
281: <h1>Sorry ...</h1>
282: Please <a href="/">log in again</a>.
283: </body>
284: </html>
285: ENDRFAILED
286: }
287:
1.1 albertel 288: # ---------------------------------------------------------------- Main handler
289:
290: sub handler {
291: my $r = shift;
1.55 www 292:
293: # Are we re-routing?
294: if (-e '/home/httpd/html/lon-status/reroute.txt') {
295: &reroute($r);
296: return OK;
297: }
1.56 www 298:
1.57 www 299: &Apache::lonlocal::get_language_handle($r);
1.1 albertel 300:
1.59 www 301: # -------------------------------- Prevent users from attempting to login twice
302: my %cookies=CGI::Cookie->parse($r->header_in('Cookie'));
303: my $lonid=$cookies{'lonID'};
304: my $cookie;
305: if ($lonid) {
306: my $handle=$lonid->value;
307: $handle=~s/\W//g;
308: my $lonidsdir=$r->dir_config('lonIDsDir');
309: if ((-e "$lonidsdir/$handle.id") && ($handle ne '')) {
310: # Indeed, a valid token is found
311: $r->send_cgi_header(<<ENDFHEADER);
312: Content-type: text/html
313:
314: ENDFHEADER
315: my $bodytag=&Apache::loncommon::bodytag('Already logged in');
316: $r->print(<<ENDFAILED);
317: <html>
318: <head>
319: <title>Already logged in</title>
320: </head>
321: $bodytag
322: <h1>You are already logged in</h1>
323: <p>Please either <a href="/adm/roles">continue the current session</a> or
324: <a href="/adm/logout">logout</a>.</p>
325: <p>
326: <a href="/adm/loginproblems.html">Problems?</a></p>
327: </body>
328: </html>
329: ENDFAILED
330: return OK;
331: }
332: }
333:
334: # ---------------------------------------------------- No valid token, continue
335:
336:
1.1 albertel 337: my $buffer;
1.49 albertel 338: $r->read($buffer,$r->header_in('Content-length'),0);
1.1 albertel 339: my @pairs=split(/&/,$buffer);
1.37 www 340: my $pair; my $name; my $value;
341: undef %FORM;
342: %FORM=();
1.1 albertel 343: foreach $pair (@pairs) {
344: ($name,$value) = split(/=/,$pair);
1.7 www 345: $value =~ tr/+/ /;
346: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
1.1 albertel 347: $FORM{$name}=$value;
348: }
349:
350: if ((!$FORM{'uname'}) || (!$FORM{'upass'}) || (!$FORM{'udom'})) {
1.43 www 351: failed($r,'Username, password and domain need to be specified.');
1.1 albertel 352: return OK;
353: }
1.61 www 354:
355: # split user logging in and "su"-user
356:
357: ($FORM{'uname'},$FORM{'suname'})=split(/\:/,$FORM{'uname'});
1.1 albertel 358: $FORM{'uname'} =~ s/\W//g;
1.61 www 359: $FORM{'suname'} =~ s/\W//g;
1.1 albertel 360: $FORM{'udom'} =~ s/\W//g;
361:
362: my $role = $r->dir_config('lonRole');
363: my $domain = $r->dir_config('lonDefDomain');
364: my $prodir = $r->dir_config('lonUsersDir');
365:
1.8 www 366: # ---------------------------------------- Get the information from login token
367:
368: my $tmpinfo=Apache::lonnet::reply('tmpget:'.$FORM{'logtoken'},
369: $FORM{'serverid'});
370:
371: if (($tmpinfo=~/^error/) || ($tmpinfo eq 'con_lost')) {
1.43 www 372: failed($r,'Information needed to verify your login information is missing, inaccessible or expired.');
1.8 www 373: return OK;
1.44 www 374: } else {
375: unless (&Apache::lonnet::reply('tmpdel:'.$FORM{'logtoken'},
376: $FORM{'serverid'}) eq 'ok') {
377: &failed($r,'Session could not be opened.');
378: }
1.8 www 379: }
1.9 www 380: my ($key,$firsturl)=split(/&/,$tmpinfo);
1.8 www 381:
382: my $keybin=pack("H16",$key);
383:
1.26 harris41 384: my $cipher;
385: if ($Crypt::DES::VERSION>=2.03) {
386: $cipher=new Crypt::DES $keybin;
387: }
388: else {
389: $cipher=new DES $keybin;
390: }
1.8 www 391:
392: my $upass=$cipher->decrypt(
393: unpack("a8",pack("H16",substr($FORM{'upass'},0,16))));
394:
395: $upass.=$cipher->decrypt(
396: unpack("a8",pack("H16",substr($FORM{'upass'},16,16))));
397:
398: $upass=substr($upass,1,ord(substr($upass,0,1)));
399:
1.1 albertel 400: # ---------------------------------------------------------------- Authenticate
401: my $authhost=Apache::lonnet::authenticate($FORM{'uname'},
1.8 www 402: $upass,
1.1 albertel 403: $FORM{'udom'});
404:
405: # --------------------------------------------------------------------- Failed?
406:
407: if ($authhost eq 'no_host') {
1.43 www 408: failed($r,'Username and/or password could not be authenticated.');
1.1 albertel 409: return OK;
410: }
411:
1.59 www 412: if (($firsturl eq '') ||
413: ($firsturl=~/^\/adm\/(logout|remote)/)) {
1.24 www 414: $firsturl='/adm/roles';
1.7 www 415: }
1.61 www 416: # --------------------------------- Are we attempting to login as somebody else?
417: if ($FORM{'suname'}) {
418: # ------------ see if the original user has enough privileges to pull this stunt
419: if (&Apache::lonnet::privileged($FORM{'uname'},$FORM{'udom'})) {
420: # ---------------------------------------------------- see if the su-user exists
421: unless (&Apache::lonnet::homeserver($FORM{'suname'},$FORM{'udom'})
422: eq 'no_host') {
423: &Apache::lonnet::logthis(&Apache::lonnet::homeserver($FORM{'suname'},$FORM{'udom'}));
424: # ------------------------------ see if the su-user is not too highly privileged
425: unless (&Apache::lonnet::privileged($FORM{'suname'},$FORM{'udom'})) {
426: # -------------------------------------------------------- actually switch users
427: &Apache::lonnet::logperm('User '.$FORM{'uname'}.' at '.$FORM{'udom'}.
428: ' logging in as '.$FORM{'suname'});
429: $FORM{'uname'}=$FORM{'suname'};
430: } else {
431: &Apache::lonnet::logthis('Attempted switch user to privileged user');
432: }
433: }
434: } else {
435: &Apache::lonnet::logthis('Non-privileged user attempting switch user');
436: }
437: }
438: &success($r,$FORM{'uname'},$FORM{'udom'},$authhost,$firsturl);
1.1 albertel 439: return OK;
440: }
441:
442: 1;
443: __END__
1.7 www 444:
445:
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