Annotation of loncom/auth/lonauth.pm, revision 1.74
1.1 albertel 1: # The LearningOnline Network
2: # User Authentication Module
1.27 www 3: #
1.74 ! albertel 4: # $Id: lonauth.pm,v 1.73 2006/01/19 22:14:38 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: #
1.1 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;
1.72 www 43: use POSIX qw(strftime);
1.37 www 44:
45: my %FORM;
46:
1.1 albertel 47: # ------------------------------------------------------------ Successful login
48:
49: sub success {
1.6 www 50: my ($r, $username, $domain, $authhost,$lowerurl) = @_;
1.1 albertel 51: my $lonids=$r->dir_config('lonIDsDir');
1.4 www 52:
1.69 albertel 53: my $public=($username eq 'public' && $domain eq 'public');
54:
1.4 www 55: # See if old ID present, if so, remove
1.17 www 56:
1.69 albertel 57: my ($filename,$cookie,$userroles);
58: my $now=time;
59:
60: if ($public) {
61: my $max_public=100;
62: my $oldest;
63: my $oldest_time=0;
64: for(my $next=1;$next<=$max_public;$next++) {
65: if (-e $lonids."/publicuser_$next.id") {
66: my $mtime=(stat($lonids."/publicuser_$next.id"))[9];
67: if ($mtime<$oldest_time || !$oldest_time) {
68: $oldest_time=$mtime;
69: $oldest=$next;
70: }
71: } else {
72: $cookie="publicuser_$next";
73: last;
74: }
75: }
76: if (!$cookie) { $cookie="publicuser_$oldest"; }
77: } else {
78: opendir(DIR,$lonids);
79: while ($filename=readdir(DIR)) {
80: if ($filename=~/^$username\_\d+\_$domain\_$authhost\.id$/) {
81: unlink($lonids.'/'.$filename);
82: }
83: }
84: closedir(DIR);
1.4 www 85:
86: # Give them a new cookie
87:
1.69 albertel 88: $cookie="$username\_$now\_$domain\_$authhost";
89:
1.5 www 90: # Initialize roles
91:
1.69 albertel 92: $userroles=Apache::lonnet::rolesinit($domain,$username,$authhost);
93: }
1.7 www 94: # ------------------------------------ Check browser type and MathML capability
1.6 www 95:
1.45 matthew 96: my ($httpbrowser,$clientbrowser,$clientversion,$clientmathml,
97: $clientunicode,$clientos) = &Apache::loncommon::decode_user_agent($r);
1.6 www 98:
1.40 www 99: # -------------------------------------- Any accessibility options to remember?
100: if (($FORM{'interface'}) && ($FORM{'remember'} eq 'true')) {
1.41 albertel 101: foreach ('imagesuppress','appletsuppress',
102: 'embedsuppress','fontenhance','blackwhite') {
103: if ($FORM{$_} eq 'true') {
104: &Apache::lonnet::put('environment',{$_ => 'on'},
105: $domain,$username);
106: } else {
107: &Apache::lonnet::del('environment',[$_],$domain,$username);
108: }
109: }
110: }
1.11 www 111: # ------------------------------------------------------------- Get environment
112:
1.32 albertel 113: my $userenv;
114: my %userenv=Apache::lonnet::dump('environment',$domain,$username);
115: my ($tmp) = keys(%userenv);
116: if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
1.73 albertel 117: # default remote control to off
118: if ($userenv{'remote'} ne 'on') { $userenv{'remote'} = 'off'; }
1.32 albertel 119: foreach my $key (keys(%userenv)) {
120: $userenv.="environment.$key=$userenv{$key}\n";
121: }
1.11 www 122: }
1.38 www 123: if (($userenv{'interface'}) && (!$FORM{'interface'})) {
124: $FORM{'interface'}=$userenv{'interface'};
125: }
1.66 albertel 126: $env{'environment.remote'}=$userenv{'remote'};
1.65 albertel 127: if ($userenv{'texengine'} eq 'ttm') { $clientmathml=1; }
128:
1.54 www 129: # --------------- Do not trust query string to be put directly into environment
130: foreach ('imagesuppress','appletsuppress',
131: 'embedsuppress','fontenhance','blackwhite',
132: 'interface','localpath','localres') {
133: $FORM{$_}=~s/[\n\r\=]//gs;
134: }
1.7 www 135: # --------------------------------------------------------- Write first profile
1.5 www 136:
1.41 albertel 137: {
138: my $idf=Apache::File->new(">$lonids/$cookie.id");
139: unless (flock($idf,LOCK_EX)) {
140: &Apache::lonnet::logthis("<font color=blue>WARNING: ".
141: 'Could not obtain exclusive lock in lonauth: '.$!);
142: $idf->close();
143: return 'error: '.$!;
144: }
145: if ($userenv ne '') { print $idf "$userenv\n"; }
146: print $idf "user.name=$username\n";
147: print $idf "user.domain=$domain\n";
148: print $idf "user.home=$authhost\n";
149: print $idf "browser.type=$clientbrowser\n";
150: print $idf "browser.version=$clientversion\n";
151: print $idf "browser.mathml=$clientmathml\n";
152: print $idf "browser.unicode=$clientunicode\n";
153: print $idf "browser.os=$clientos\n";
1.53 www 154: if ($FORM{'localpath'}) {
155: print $idf "browser.localpath=$FORM{'localpath'}\n";
156: print $idf "browser.localres=$FORM{'localres'}\n";
157: }
1.71 www 158: print $idf "server.domain=".$r->dir_config('lonDefDomain')."\n";
1.72 www 159: my $timezone=POSIX::strftime("%Z",localtime(time));
1.71 www 160: print $idf "server.timezone=$timezone\n";
1.41 albertel 161: print $idf "request.course.fn=\n";
162: print $idf "request.course.uri=\n";
163: print $idf "request.course.sec=\n";
164: print $idf "request.role=cm\n";
1.66 albertel 165: print $idf "request.role.adv=$env{'user.adv'}\n";
1.42 www 166: print $idf "request.host=$ENV{'REMOTE_ADDR'}\n";
1.69 albertel 167: if ($public) {
1.68 albertel 168: print $idf "environment.remote=off\n";
169: }
1.41 albertel 170: if ($FORM{'interface'}) {
171: $FORM{'interface'}=~s/\W//gs;
172: print $idf "browser.interface=$FORM{'interface'}\n";
1.66 albertel 173: $env{'browser.interface'}=$FORM{'interface'};
1.41 albertel 174: foreach ('imagesuppress','appletsuppress',
175: 'embedsuppress','fontenhance','blackwhite') {
176: if (($FORM{$_} eq 'true') ||
177: ($userenv{$_} eq 'on')) {
178: print $idf "browser.$_=on\n";
179: }
1.18 albertel 180: }
1.41 albertel 181: }
182: if ($userroles ne '') { print $idf "$userroles"; }
183: $idf->close();
184: }
1.66 albertel 185: $env{'request.role'}='cm';
186: $env{'request.role.adv'}=$env{'user.adv'};
187: $env{'browser.type'}=$clientbrowser;
1.7 www 188: # -------------------------------------------------------------------- Log this
189:
190: &Apache::lonnet::log($domain,$username,$authhost,
191: "Login $ENV{'REMOTE_ADDR'}");
1.4 www 192:
1.14 www 193: # ------------------------------------------------- Check for critical messages
194:
1.21 www 195: my @what=&Apache::lonnet::dump('critical',$domain,$username);
1.14 www 196: if ($what[0]) {
1.22 www 197: if (($what[0] ne 'con_lost') && ($what[0]!~/^error\:/)) {
1.21 www 198: $lowerurl='/adm/email?critical=display';
1.14 www 199: }
200: }
201:
1.5 www 202: # ------------------------------------------------------------ Get cookie ready
203:
1.70 albertel 204: if ($public or $lowerurl eq 'noredirect') { return $cookie; }
205:
1.1 albertel 206: $cookie="lonID=$cookie; path=/";
1.12 www 207: # -------------------------------------------------------- Menu script and info
1.31 www 208: my $windowinfo=&Apache::lonmenu::open($clientos);
1.35 www 209: my $startupremote=&Apache::lonmenu::startupremote($lowerurl);
1.63 albertel 210: my $remoteinfo=&Apache::lonmenu::load_remote_msg($lowerurl);
1.35 www 211: my $setflags=&Apache::lonmenu::setflags();
212: my $maincall=&Apache::lonmenu::maincall();
1.74 ! albertel 213: my $start_page=&Apache::loncommon::start_page('Successful Login',
! 214: $startupremote);
! 215: my $end_page =&Apache::loncommon::end_page();
! 216:
1.64 albertel 217: my $continuelink;
1.66 albertel 218: if (($env{'browser.interface'} eq 'textual') ||
219: ($env{'environment.remote'} eq 'off')) {
1.64 albertel 220: $continuelink="<a href=\"$lowerurl\">".&mt('Continue')."</a>";
221: }
1.5 www 222: # ------------------------------------------------- Output for successful login
223:
1.74 ! albertel 224: &Apache::loncommon::content_type($r,'text/html');
! 225: $r->header_out('Set-cookie' => $cookie);
! 226: $r->send_http_header;
1.1 albertel 227:
1.58 www 228: my %lt=&Apache::lonlocal::texthash(
229: 'wel' => 'Welcome',
230: 'mes' => 'Welcome to the Learning<i>Online</i> Network with CAPA. Please wait while your session is being set up',
231: 'pro' => 'Problems',
232: 'log' => 'loginproblems.html',
233: );
1.1 albertel 234: $r->print(<<ENDSUCCESS);
1.74 ! albertel 235: $start_page
1.35 www 236: $setflags
1.19 www 237: $windowinfo
1.58 www 238: <h1>$lt{'wel'}</h1>
239: $lt{'mes'}.<p>
240: <a href="/adm/$lt{'log'}">$lt{'pro'}?</a></p>
1.63 albertel 241: $remoteinfo
1.35 www 242: $maincall
1.64 albertel 243: $continuelink
1.74 ! albertel 244: $end_page
1.1 albertel 245: ENDSUCCESS
246: }
247:
248: # --------------------------------------------------------------- Failed login!
249:
250: sub failed {
251: my ($r,$message) = @_;
1.74 ! albertel 252: my $start_page = &Apache::loncommon::start_page('Unsuccessful Login');
! 253: my $end_page = &Apache::loncommon::end_page();
! 254:
! 255: my %lt=('sorry' => &mt('Sorry ...'),
! 256: 'please' =>
! 257: &mt('Please [_1]log in again[_2].',
! 258: "<a href=\"/adm/login?username=$FORM{'uname'}&domain=$FORM{'udom'}\">",
! 259: '</a>'),
! 260: 'problemspage' => &mt('loginproblems.html'),
! 261: 'problems' => 'Problems',
! 262: );
! 263: &Apache::loncommon::content_type($r,'text/html');
! 264: $r->send_http_header;
1.1 albertel 265:
266: $r->print(<<ENDFAILED);
1.74 ! albertel 267: $start_page
! 268: <h1>$lt{'sorry'}</h1>
1.43 www 269: <p><b>$message</b></p>
1.74 ! albertel 270: <p>$lt{'please'}</p>
1.43 www 271: <p>
1.74 ! albertel 272: <a href="/adm/$lt{'problemspage'}">$lt{'problems'}</a></p>
! 273: $end_page
1.1 albertel 274: ENDFAILED
1.60 www 275: }
276:
1.55 www 277: # ------------------------------------------------------------------ Rerouting!
278:
279: sub reroute {
1.74 ! albertel 280: my ($r) = @_;
! 281: &Apache::loncommon::content_type($r,'text/html');
! 282: $r->send_http_header;
! 283: my $msg='<h1>Sorry ...</h1>
! 284: Please <a href="/">log in again</a>.';
! 285: &Apache::loncommon::simple_error_page($r,'Rerouting',$msg);
1.55 www 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") && ($handle ne '')) {
310: # Indeed, a valid token is found
1.74 ! albertel 311: &Apache::loncommon::content_type($r,'text/html');
! 312: $r->send_http_header;
! 313: my $start_page =
! 314: &Apache::loncommon::start_page('Already logged in');
! 315: my $end_page =
! 316: &Apache::loncommon::end_page();
1.59 www 317: $r->print(<<ENDFAILED);
1.74 ! albertel 318: $start_page
1.59 www 319: <h1>You are already logged in</h1>
320: <p>Please either <a href="/adm/roles">continue the current session</a> or
321: <a href="/adm/logout">logout</a>.</p>
322: <p>
323: <a href="/adm/loginproblems.html">Problems?</a></p>
1.74 ! albertel 324: $end_page
1.59 www 325: ENDFAILED
326: return OK;
327: }
328: }
329:
330: # ---------------------------------------------------- No valid token, continue
331:
332:
1.1 albertel 333: my $buffer;
1.49 albertel 334: $r->read($buffer,$r->header_in('Content-length'),0);
1.1 albertel 335: my @pairs=split(/&/,$buffer);
1.37 www 336: my $pair; my $name; my $value;
337: undef %FORM;
338: %FORM=();
1.1 albertel 339: foreach $pair (@pairs) {
340: ($name,$value) = split(/=/,$pair);
1.7 www 341: $value =~ tr/+/ /;
342: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
1.1 albertel 343: $FORM{$name}=$value;
344: }
345:
1.67 www 346: if ((!$FORM{'uname'}) || (!$FORM{'upass0'}) || (!$FORM{'udom'})) {
1.43 www 347: failed($r,'Username, password and domain need to be specified.');
1.1 albertel 348: return OK;
349: }
1.61 www 350:
351: # split user logging in and "su"-user
352:
353: ($FORM{'uname'},$FORM{'suname'})=split(/\:/,$FORM{'uname'});
1.1 albertel 354: $FORM{'uname'} =~ s/\W//g;
1.61 www 355: $FORM{'suname'} =~ s/\W//g;
1.1 albertel 356: $FORM{'udom'} =~ s/\W//g;
357:
358: my $role = $r->dir_config('lonRole');
359: my $domain = $r->dir_config('lonDefDomain');
360: my $prodir = $r->dir_config('lonUsersDir');
361:
1.8 www 362: # ---------------------------------------- Get the information from login token
363:
364: my $tmpinfo=Apache::lonnet::reply('tmpget:'.$FORM{'logtoken'},
365: $FORM{'serverid'});
366:
367: if (($tmpinfo=~/^error/) || ($tmpinfo eq 'con_lost')) {
1.43 www 368: failed($r,'Information needed to verify your login information is missing, inaccessible or expired.');
1.8 www 369: return OK;
1.44 www 370: } else {
371: unless (&Apache::lonnet::reply('tmpdel:'.$FORM{'logtoken'},
372: $FORM{'serverid'}) eq 'ok') {
373: &failed($r,'Session could not be opened.');
374: }
1.8 www 375: }
1.9 www 376: my ($key,$firsturl)=split(/&/,$tmpinfo);
1.8 www 377:
378: my $keybin=pack("H16",$key);
379:
1.26 harris41 380: my $cipher;
381: if ($Crypt::DES::VERSION>=2.03) {
382: $cipher=new Crypt::DES $keybin;
383: }
384: else {
385: $cipher=new DES $keybin;
386: }
1.67 www 387: my $upass='';
388: for (my $i=0;$i<=2;$i++) {
389: my $chunk=
390: $cipher->decrypt(unpack("a8",pack("H16",substr($FORM{'upass'.$i},0,16))));
1.8 www 391:
1.67 www 392: $chunk.=
393: $cipher->decrypt(unpack("a8",pack("H16",substr($FORM{'upass'.$i},16,16))));
1.8 www 394:
1.67 www 395: $chunk=substr($chunk,1,ord(substr($chunk,0,1)));
396: $upass.=$chunk;
397: }
1.8 www 398:
1.1 albertel 399: # ---------------------------------------------------------------- Authenticate
400: my $authhost=Apache::lonnet::authenticate($FORM{'uname'},
1.8 www 401: $upass,
1.1 albertel 402: $FORM{'udom'});
403:
404: # --------------------------------------------------------------------- Failed?
405:
406: if ($authhost eq 'no_host') {
1.43 www 407: failed($r,'Username and/or password could not be authenticated.');
1.1 albertel 408: return OK;
409: }
410:
1.59 www 411: if (($firsturl eq '') ||
412: ($firsturl=~/^\/adm\/(logout|remote)/)) {
1.24 www 413: $firsturl='/adm/roles';
1.7 www 414: }
1.61 www 415: # --------------------------------- Are we attempting to login as somebody else?
416: if ($FORM{'suname'}) {
417: # ------------ see if the original user has enough privileges to pull this stunt
418: if (&Apache::lonnet::privileged($FORM{'uname'},$FORM{'udom'})) {
419: # ---------------------------------------------------- see if the su-user exists
420: unless (&Apache::lonnet::homeserver($FORM{'suname'},$FORM{'udom'})
421: eq 'no_host') {
422: &Apache::lonnet::logthis(&Apache::lonnet::homeserver($FORM{'suname'},$FORM{'udom'}));
423: # ------------------------------ see if the su-user is not too highly privileged
424: unless (&Apache::lonnet::privileged($FORM{'suname'},$FORM{'udom'})) {
425: # -------------------------------------------------------- actually switch users
426: &Apache::lonnet::logperm('User '.$FORM{'uname'}.' at '.$FORM{'udom'}.
427: ' logging in as '.$FORM{'suname'});
428: $FORM{'uname'}=$FORM{'suname'};
429: } else {
430: &Apache::lonnet::logthis('Attempted switch user to privileged user');
431: }
432: }
433: } else {
434: &Apache::lonnet::logthis('Non-privileged user attempting switch user');
435: }
436: }
437: &success($r,$FORM{'uname'},$FORM{'udom'},$authhost,$firsturl);
1.1 albertel 438: return OK;
439: }
440:
441: 1;
442: __END__
1.7 www 443:
444:
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