Annotation of loncom/auth/lonauth.pm, revision 1.78
1.1 albertel 1: # The LearningOnline Network
2: # User Authentication Module
1.27 www 3: #
1.78 ! albertel 4: # $Id: lonauth.pm,v 1.77 2006/05/31 15:33:39 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;
1.78 ! albertel 32: use LONCAPA;
1.1 albertel 33: use Apache::Constants qw(:common);
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:
1.69 albertel 52: my $public=($username eq 'public' && $domain eq 'public');
53:
1.4 www 54: # See if old ID present, if so, remove
1.17 www 55:
1.69 albertel 56: my ($filename,$cookie,$userroles);
57: my $now=time;
58:
59: if ($public) {
60: my $max_public=100;
61: my $oldest;
62: my $oldest_time=0;
63: for(my $next=1;$next<=$max_public;$next++) {
64: if (-e $lonids."/publicuser_$next.id") {
65: my $mtime=(stat($lonids."/publicuser_$next.id"))[9];
66: if ($mtime<$oldest_time || !$oldest_time) {
67: $oldest_time=$mtime;
68: $oldest=$next;
69: }
70: } else {
71: $cookie="publicuser_$next";
72: last;
73: }
74: }
75: if (!$cookie) { $cookie="publicuser_$oldest"; }
76: } else {
77: opendir(DIR,$lonids);
78: while ($filename=readdir(DIR)) {
79: if ($filename=~/^$username\_\d+\_$domain\_$authhost\.id$/) {
80: unlink($lonids.'/'.$filename);
81: }
82: }
83: closedir(DIR);
1.4 www 84:
85: # Give them a new cookie
86:
1.69 albertel 87: $cookie="$username\_$now\_$domain\_$authhost";
88:
1.5 www 89: # Initialize roles
90:
1.69 albertel 91: $userroles=Apache::lonnet::rolesinit($domain,$username,$authhost);
92: }
1.7 www 93: # ------------------------------------ Check browser type and MathML capability
1.6 www 94:
1.45 matthew 95: my ($httpbrowser,$clientbrowser,$clientversion,$clientmathml,
96: $clientunicode,$clientos) = &Apache::loncommon::decode_user_agent($r);
1.6 www 97:
1.40 www 98: # -------------------------------------- Any accessibility options to remember?
99: if (($FORM{'interface'}) && ($FORM{'remember'} eq 'true')) {
1.41 albertel 100: foreach ('imagesuppress','appletsuppress',
101: 'embedsuppress','fontenhance','blackwhite') {
102: if ($FORM{$_} eq 'true') {
103: &Apache::lonnet::put('environment',{$_ => 'on'},
104: $domain,$username);
105: } else {
106: &Apache::lonnet::del('environment',[$_],$domain,$username);
107: }
108: }
109: }
1.11 www 110: # ------------------------------------------------------------- Get environment
111:
1.32 albertel 112: my %userenv=Apache::lonnet::dump('environment',$domain,$username);
113: my ($tmp) = keys(%userenv);
114: if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
1.73 albertel 115: # default remote control to off
116: if ($userenv{'remote'} ne 'on') { $userenv{'remote'} = 'off'; }
1.78 ! albertel 117: } else {
! 118: undef(%userenv);
1.11 www 119: }
1.38 www 120: if (($userenv{'interface'}) && (!$FORM{'interface'})) {
121: $FORM{'interface'}=$userenv{'interface'};
122: }
1.66 albertel 123: $env{'environment.remote'}=$userenv{'remote'};
1.65 albertel 124: if ($userenv{'texengine'} eq 'ttm') { $clientmathml=1; }
125:
1.54 www 126: # --------------- Do not trust query string to be put directly into environment
127: foreach ('imagesuppress','appletsuppress',
128: 'embedsuppress','fontenhance','blackwhite',
129: 'interface','localpath','localres') {
130: $FORM{$_}=~s/[\n\r\=]//gs;
131: }
1.7 www 132: # --------------------------------------------------------- Write first profile
1.5 www 133:
1.41 albertel 134: {
1.78 ! albertel 135: my %initial_env =
! 136: ("user.name" => $username,
! 137: "user.domain" => $domain,
! 138: "user.home" => $authhost,
! 139: "browser.type" => $clientbrowser,
! 140: "browser.version" => $clientversion,
! 141: "browser.mathml" => $clientmathml,
! 142: "browser.unicode" => $clientunicode,
! 143: "browser.os" => $clientos,
! 144: "server.domain" => $r->dir_config('lonDefDomain'),
! 145: "request.course.fn" => '',
! 146: "request.course.uri" => '',
! 147: "request.course.sec" => '',
! 148: "request.role" => 'cm',
! 149: "request.role.adv" => $env{'user.adv'},
! 150: "request.host" => $ENV{'REMOTE_ADDR'},);
! 151:
1.53 www 152: if ($FORM{'localpath'}) {
1.78 ! albertel 153: $initial_env{"browser.localpath"} = $FORM{'localpath'};
! 154: $initial_env{"browser.localres"} = $FORM{'localres'};
1.53 www 155: }
1.78 ! albertel 156:
1.69 albertel 157: if ($public) {
1.78 ! albertel 158: $initial_env{"environment.remote"} = "off";
1.68 albertel 159: }
1.41 albertel 160: if ($FORM{'interface'}) {
161: $FORM{'interface'}=~s/\W//gs;
1.78 ! albertel 162: $initial_env{"browser.interface"} = $FORM{'interface'};
1.66 albertel 163: $env{'browser.interface'}=$FORM{'interface'};
1.78 ! albertel 164: foreach my $option ('imagesuppress','appletsuppress',
! 165: 'embedsuppress','fontenhance','blackwhite') {
! 166: if (($FORM{$option} eq 'true') ||
! 167: ($userenv{$option} eq 'on')) {
! 168: $initial_env{"browser.$option"} = "on";
1.41 albertel 169: }
1.18 albertel 170: }
1.41 albertel 171: }
1.78 ! albertel 172:
! 173: open(my $idf,">$lonids/$cookie.id");
! 174: unless (flock($idf,LOCK_EX)) {
! 175: &Apache::lonnet::logthis("<font color=blue>WARNING: ".
! 176: 'Could not obtain exclusive lock in lonauth: '.$!);
! 177: close($idf);
! 178: return 'error: '.$!;
! 179: }
! 180:
! 181: while (my ($key,$value) = each(%initial_env)) {
! 182: print $idf (&escape($key).'='.&escape($value)."\n");
! 183: }
! 184: while (my ($key,$value) = each(%userenv)) {
! 185: print $idf (&escape($key).'='.&escape($value)."\n");
! 186: }
1.41 albertel 187: if ($userroles ne '') { print $idf "$userroles"; }
1.78 ! albertel 188: close($idf);
1.41 albertel 189: }
1.66 albertel 190: $env{'request.role'}='cm';
191: $env{'request.role.adv'}=$env{'user.adv'};
192: $env{'browser.type'}=$clientbrowser;
1.7 www 193: # -------------------------------------------------------------------- Log this
194:
195: &Apache::lonnet::log($domain,$username,$authhost,
196: "Login $ENV{'REMOTE_ADDR'}");
1.4 www 197:
1.14 www 198: # ------------------------------------------------- Check for critical messages
199:
1.21 www 200: my @what=&Apache::lonnet::dump('critical',$domain,$username);
1.14 www 201: if ($what[0]) {
1.22 www 202: if (($what[0] ne 'con_lost') && ($what[0]!~/^error\:/)) {
1.21 www 203: $lowerurl='/adm/email?critical=display';
1.14 www 204: }
205: }
206:
1.5 www 207: # ------------------------------------------------------------ Get cookie ready
208:
1.70 albertel 209: if ($public or $lowerurl eq 'noredirect') { return $cookie; }
210:
1.1 albertel 211: $cookie="lonID=$cookie; path=/";
1.12 www 212: # -------------------------------------------------------- Menu script and info
1.31 www 213: my $windowinfo=&Apache::lonmenu::open($clientos);
1.35 www 214: my $startupremote=&Apache::lonmenu::startupremote($lowerurl);
1.63 albertel 215: my $remoteinfo=&Apache::lonmenu::load_remote_msg($lowerurl);
1.35 www 216: my $setflags=&Apache::lonmenu::setflags();
217: my $maincall=&Apache::lonmenu::maincall();
1.74 albertel 218: my $start_page=&Apache::loncommon::start_page('Successful Login',
1.76 albertel 219: $startupremote,
220: {'no_inline_link' => 1,});
1.74 albertel 221: my $end_page =&Apache::loncommon::end_page();
222:
1.64 albertel 223: my $continuelink;
1.66 albertel 224: if (($env{'browser.interface'} eq 'textual') ||
225: ($env{'environment.remote'} eq 'off')) {
1.64 albertel 226: $continuelink="<a href=\"$lowerurl\">".&mt('Continue')."</a>";
227: }
1.5 www 228: # ------------------------------------------------- Output for successful login
229:
1.74 albertel 230: &Apache::loncommon::content_type($r,'text/html');
231: $r->header_out('Set-cookie' => $cookie);
232: $r->send_http_header;
1.1 albertel 233:
1.58 www 234: my %lt=&Apache::lonlocal::texthash(
235: 'wel' => 'Welcome',
236: 'mes' => 'Welcome to the Learning<i>Online</i> Network with CAPA. Please wait while your session is being set up',
237: 'pro' => 'Problems',
238: 'log' => 'loginproblems.html',
239: );
1.1 albertel 240: $r->print(<<ENDSUCCESS);
1.74 albertel 241: $start_page
1.35 www 242: $setflags
1.19 www 243: $windowinfo
1.58 www 244: <h1>$lt{'wel'}</h1>
245: $lt{'mes'}.<p>
246: <a href="/adm/$lt{'log'}">$lt{'pro'}?</a></p>
1.63 albertel 247: $remoteinfo
1.35 www 248: $maincall
1.64 albertel 249: $continuelink
1.74 albertel 250: $end_page
1.1 albertel 251: ENDSUCCESS
252: }
253:
254: # --------------------------------------------------------------- Failed login!
255:
256: sub failed {
257: my ($r,$message) = @_;
1.76 albertel 258: my $start_page = &Apache::loncommon::start_page('Unsuccessful Login',undef,
259: {'no_inline_link' => 1,});
1.74 albertel 260: my $end_page = &Apache::loncommon::end_page();
261:
262: my %lt=('sorry' => &mt('Sorry ...'),
263: 'please' =>
264: &mt('Please [_1]log in again[_2].',
265: "<a href=\"/adm/login?username=$FORM{'uname'}&domain=$FORM{'udom'}\">",
266: '</a>'),
267: 'problemspage' => &mt('loginproblems.html'),
268: 'problems' => 'Problems',
269: );
270: &Apache::loncommon::content_type($r,'text/html');
271: $r->send_http_header;
1.1 albertel 272:
273: $r->print(<<ENDFAILED);
1.74 albertel 274: $start_page
275: <h1>$lt{'sorry'}</h1>
1.43 www 276: <p><b>$message</b></p>
1.74 albertel 277: <p>$lt{'please'}</p>
1.43 www 278: <p>
1.74 albertel 279: <a href="/adm/$lt{'problemspage'}">$lt{'problems'}</a></p>
280: $end_page
1.1 albertel 281: ENDFAILED
1.60 www 282: }
283:
1.55 www 284: # ------------------------------------------------------------------ Rerouting!
285:
286: sub reroute {
1.74 albertel 287: my ($r) = @_;
288: &Apache::loncommon::content_type($r,'text/html');
289: $r->send_http_header;
290: my $msg='<h1>Sorry ...</h1>
291: Please <a href="/">log in again</a>.';
292: &Apache::loncommon::simple_error_page($r,'Rerouting',$msg);
1.55 www 293: }
294:
1.1 albertel 295: # ---------------------------------------------------------------- Main handler
296:
297: sub handler {
298: my $r = shift;
1.55 www 299:
300: # Are we re-routing?
301: if (-e '/home/httpd/html/lon-status/reroute.txt') {
302: &reroute($r);
303: return OK;
304: }
1.56 www 305:
1.57 www 306: &Apache::lonlocal::get_language_handle($r);
1.1 albertel 307:
1.59 www 308: # -------------------------------- Prevent users from attempting to login twice
309: my %cookies=CGI::Cookie->parse($r->header_in('Cookie'));
310: my $lonid=$cookies{'lonID'};
311: my $cookie;
312: if ($lonid) {
313: my $handle=$lonid->value;
314: $handle=~s/\W//g;
315: my $lonidsdir=$r->dir_config('lonIDsDir');
316: if ((-e "$lonidsdir/$handle.id") && ($handle ne '')) {
317: # Indeed, a valid token is found
1.74 albertel 318: &Apache::loncommon::content_type($r,'text/html');
319: $r->send_http_header;
320: my $start_page =
321: &Apache::loncommon::start_page('Already logged in');
322: my $end_page =
323: &Apache::loncommon::end_page();
1.59 www 324: $r->print(<<ENDFAILED);
1.74 albertel 325: $start_page
1.59 www 326: <h1>You are already logged in</h1>
327: <p>Please either <a href="/adm/roles">continue the current session</a> or
328: <a href="/adm/logout">logout</a>.</p>
329: <p>
330: <a href="/adm/loginproblems.html">Problems?</a></p>
1.74 albertel 331: $end_page
1.59 www 332: ENDFAILED
333: return OK;
334: }
335: }
336:
337: # ---------------------------------------------------- No valid token, continue
338:
339:
1.1 albertel 340: my $buffer;
1.49 albertel 341: $r->read($buffer,$r->header_in('Content-length'),0);
1.1 albertel 342: my @pairs=split(/&/,$buffer);
1.37 www 343: my $pair; my $name; my $value;
344: undef %FORM;
345: %FORM=();
1.1 albertel 346: foreach $pair (@pairs) {
347: ($name,$value) = split(/=/,$pair);
1.7 www 348: $value =~ tr/+/ /;
349: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
1.1 albertel 350: $FORM{$name}=$value;
351: }
352:
1.67 www 353: if ((!$FORM{'uname'}) || (!$FORM{'upass0'}) || (!$FORM{'udom'})) {
1.43 www 354: failed($r,'Username, password and domain need to be specified.');
1.1 albertel 355: return OK;
356: }
1.61 www 357:
358: # split user logging in and "su"-user
359:
360: ($FORM{'uname'},$FORM{'suname'})=split(/\:/,$FORM{'uname'});
1.1 albertel 361: $FORM{'uname'} =~ s/\W//g;
1.61 www 362: $FORM{'suname'} =~ s/\W//g;
1.1 albertel 363: $FORM{'udom'} =~ s/\W//g;
364:
365: my $role = $r->dir_config('lonRole');
366: my $domain = $r->dir_config('lonDefDomain');
367: my $prodir = $r->dir_config('lonUsersDir');
368:
1.8 www 369: # ---------------------------------------- Get the information from login token
370:
371: my $tmpinfo=Apache::lonnet::reply('tmpget:'.$FORM{'logtoken'},
372: $FORM{'serverid'});
373:
374: if (($tmpinfo=~/^error/) || ($tmpinfo eq 'con_lost')) {
1.43 www 375: failed($r,'Information needed to verify your login information is missing, inaccessible or expired.');
1.8 www 376: return OK;
1.44 www 377: } else {
1.77 albertel 378: my $reply = &Apache::lonnet::reply('tmpdel:'.$FORM{'logtoken'},
379: $FORM{'serverid'});
380: if ( $reply ne 'ok' ) {
1.44 www 381: &failed($r,'Session could not be opened.');
1.77 albertel 382: &Apache::lonnet::logthis("ERROR got a reply of $reply when trying to contact ". $FORM{'serverid'}." to get login token");
383: return OK;
1.44 www 384: }
1.8 www 385: }
1.9 www 386: my ($key,$firsturl)=split(/&/,$tmpinfo);
1.8 www 387:
388: my $keybin=pack("H16",$key);
389:
1.26 harris41 390: my $cipher;
391: if ($Crypt::DES::VERSION>=2.03) {
392: $cipher=new Crypt::DES $keybin;
393: }
394: else {
395: $cipher=new DES $keybin;
396: }
1.67 www 397: my $upass='';
398: for (my $i=0;$i<=2;$i++) {
399: my $chunk=
400: $cipher->decrypt(unpack("a8",pack("H16",substr($FORM{'upass'.$i},0,16))));
1.8 www 401:
1.67 www 402: $chunk.=
403: $cipher->decrypt(unpack("a8",pack("H16",substr($FORM{'upass'.$i},16,16))));
1.8 www 404:
1.67 www 405: $chunk=substr($chunk,1,ord(substr($chunk,0,1)));
406: $upass.=$chunk;
407: }
1.8 www 408:
1.1 albertel 409: # ---------------------------------------------------------------- Authenticate
410: my $authhost=Apache::lonnet::authenticate($FORM{'uname'},
1.8 www 411: $upass,
1.1 albertel 412: $FORM{'udom'});
413:
414: # --------------------------------------------------------------------- Failed?
415:
416: if ($authhost eq 'no_host') {
1.43 www 417: failed($r,'Username and/or password could not be authenticated.');
1.1 albertel 418: return OK;
419: }
420:
1.59 www 421: if (($firsturl eq '') ||
422: ($firsturl=~/^\/adm\/(logout|remote)/)) {
1.24 www 423: $firsturl='/adm/roles';
1.7 www 424: }
1.61 www 425: # --------------------------------- Are we attempting to login as somebody else?
426: if ($FORM{'suname'}) {
427: # ------------ see if the original user has enough privileges to pull this stunt
428: if (&Apache::lonnet::privileged($FORM{'uname'},$FORM{'udom'})) {
429: # ---------------------------------------------------- see if the su-user exists
430: unless (&Apache::lonnet::homeserver($FORM{'suname'},$FORM{'udom'})
431: eq 'no_host') {
432: &Apache::lonnet::logthis(&Apache::lonnet::homeserver($FORM{'suname'},$FORM{'udom'}));
433: # ------------------------------ see if the su-user is not too highly privileged
434: unless (&Apache::lonnet::privileged($FORM{'suname'},$FORM{'udom'})) {
435: # -------------------------------------------------------- actually switch users
436: &Apache::lonnet::logperm('User '.$FORM{'uname'}.' at '.$FORM{'udom'}.
437: ' logging in as '.$FORM{'suname'});
438: $FORM{'uname'}=$FORM{'suname'};
439: } else {
440: &Apache::lonnet::logthis('Attempted switch user to privileged user');
441: }
442: }
443: } else {
444: &Apache::lonnet::logthis('Non-privileged user attempting switch user');
445: }
446: }
447: &success($r,$FORM{'uname'},$FORM{'udom'},$authhost,$firsturl);
1.1 albertel 448: return OK;
449: }
450:
451: 1;
452: __END__
1.7 www 453:
454:
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