Annotation of loncom/auth/lonauth.pm, revision 1.104

1.1       albertel    1: # The LearningOnline Network
                      2: # User Authentication Module
1.27      www         3: #
1.104   ! droeschl    4: # $Id: lonauth.pm,v 1.103 2010/03/17 17:51:06 raeburn 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);
1.26      harris41   35: use DynaLoader; # for Crypt::DES version
1.8       www        36: use Crypt::DES;
1.45      matthew    37: use Apache::loncommon();
1.66      albertel   38: use Apache::lonnet;
1.12      www        39: use Apache::lonmenu();
1.90      raeburn    40: use Apache::createaccount;
1.18      albertel   41: use Fcntl qw(:flock);
1.56      www        42: use Apache::lonlocal;
1.101     raeburn    43: use HTML::Entities;
1.85      albertel   44:  
1.1       albertel   45: # ------------------------------------------------------------ Successful login
1.85      albertel   46: sub success {
                     47:     my ($r, $username, $domain, $authhost, $lowerurl, $extra_env,
                     48: 	$form) = @_;
1.1       albertel   49: 
1.85      albertel   50: # ------------------------------------------------------------ Get cookie ready
                     51:     my $cookie =
                     52: 	&Apache::loncommon::init_user_environment($r, $username, $domain,
                     53: 						  $authhost, $form,
1.86      albertel   54: 						  {'extra_env' => $extra_env,});
1.4       www        55: 
1.69      albertel   56:     my $public=($username eq 'public' && $domain eq 'public');
                     57: 
1.85      albertel   58:     if ($public or $lowerurl eq 'noredirect') { return $cookie; }
1.78      albertel   59: 
1.7       www        60: # -------------------------------------------------------------------- Log this
                     61: 
                     62:     &Apache::lonnet::log($domain,$username,$authhost,
                     63:                          "Login $ENV{'REMOTE_ADDR'}");
1.4       www        64: 
1.14      www        65: # ------------------------------------------------- Check for critical messages
                     66: 
1.21      www        67:     my @what=&Apache::lonnet::dump('critical',$domain,$username);
1.14      www        68:     if ($what[0]) {
1.22      www        69: 	if (($what[0] ne 'con_lost') && ($what[0]!~/^error\:/)) {
1.21      www        70: 	    $lowerurl='/adm/email?critical=display';
1.14      www        71:         }
                     72:     }
                     73: 
1.5       www        74: # ------------------------------------------------------------ Get cookie ready
1.1       albertel   75:     $cookie="lonID=$cookie; path=/";
1.12      www        76: # -------------------------------------------------------- Menu script and info
1.100     raeburn    77:     my $destination = $lowerurl;
                     78: 
                     79:     if (defined($form->{role})) {
                     80:         my $envkey = 'user.role.'.$form->{role};
                     81:         my $now=time;
                     82:         my $then=$env{'user.login.time'};
                     83:         my $refresh=$env{'user.refresh.time'};
                     84:         if (exists($env{$envkey})) {
                     85:             my ($role,$where,$trolecode,$tstart,$tend,$tremark,$tstatus);
                     86:             &Apache::lonnet::role_status($envkey,$then,$refresh,$now,\$role,\$where,
                     87:                                          \$trolecode,\$tstatus,\$tstart,\$tend);
                     88:             if ($tstatus eq 'is') {
1.101     raeburn    89:                 $destination  .= ($destination =~ /\?/) ? '&' : '?';
                     90:                 my $newrole = &HTML::Entities::encode($form->{role},'"<>&');
                     91:                 $destination .= 'selectrole=1&'.$newrole.'=1';
1.100     raeburn    92:             }
                     93:         }
                     94:     }
1.101     raeburn    95:     if (defined($form->{symb})) {
                     96:         my $destsymb = $form->{symb};
                     97:         $destination  .= ($destination =~ /\?/) ? '&' : '?';
                     98:         if ($destsymb =~ /___/) {
                     99:             # FIXME Need to deal with encrypted symbs and urls as needed.
                    100:             my ($map,$resid,$desturl)=split(/___/,$destsymb);
                    101:             unless ($desturl=~/^(adm|uploaded|editupload|public)/) {
                    102:                 $desturl = &Apache::lonnet::clutter($desturl);
                    103:             }
                    104:             $desturl = &HTML::Entities::encode($desturl,'"<>&');
                    105:             $destsymb = &HTML::Entities::encode($destsymb,'"<>&');
                    106:             $destination .= '&destinationurl='.$desturl.
                    107:                             '&destsymb='.$destsymb;
                    108:         } else {
                    109:             $destsymb = &HTML::Entities::encode($destsymb,'"<>&');
                    110:             $destination .= '&destinationurl='.$destsymb;
                    111:         }
                    112:     }
1.100     raeburn   113: 
1.102     droeschl  114:     my $windowinfo = Apache::lonhtmlcommon::scripttag('self.name="loncapaclient";');
                    115:     my $header = '<meta HTTP-EQUIV="Refresh" CONTENT="0; url='.$destination.'" />';
1.99      bisitz    116:     my $brcrum = [{'href' => '',
                    117:                    'text' => 'Successful Login'},];
1.74      albertel  118:     my $start_page=&Apache::loncommon::start_page('Successful Login',
1.102     droeschl  119:                                                   $header,
1.104   ! droeschl  120:                                                   {'bread_crumbs' => $brcrum,});
1.74      albertel  121:     my $end_page  =&Apache::loncommon::end_page();
                    122: 
1.102     droeschl  123: 	my $continuelink='<a href="'.$destination.'">'.&mt('Continue').'</a>';
1.5       www       124: # ------------------------------------------------- Output for successful login
                    125: 
1.74      albertel  126:     &Apache::loncommon::content_type($r,'text/html');
                    127:     $r->header_out('Set-cookie' => $cookie);
                    128:     $r->send_http_header;
1.1       albertel  129: 
1.58      www       130:     my %lt=&Apache::lonlocal::texthash(
                    131: 				       'wel' => 'Welcome',
1.92      bisitz    132: 				       'mes' => 'Welcome to the Learning<i>Online</i> Network with CAPA. Please wait while your session is being set up.',
                    133: 				       'pro' => 'Login problems?',
1.58      www       134: 				       'log' => 'loginproblems.html',
                    135: 				       );
1.1       albertel  136:     $r->print(<<ENDSUCCESS);
1.74      albertel  137: $start_page
1.19      www       138: $windowinfo
1.58      www       139: <h1>$lt{'wel'}</h1>
1.92      bisitz    140: $lt{'mes'}<p>
                    141: <a href="/adm/$lt{'log'}">$lt{'pro'}</a></p>
1.64      albertel  142: $continuelink
1.74      albertel  143: $end_page
1.1       albertel  144: ENDSUCCESS
                    145: }
                    146: 
                    147: # --------------------------------------------------------------- Failed login!
                    148: 
                    149: sub failed {
1.85      albertel  150:     my ($r,$message,$form) = @_;
1.104   ! droeschl  151:     my $start_page = &Apache::loncommon::start_page('Unsuccessful Login',undef);
1.100     raeburn   152:     my $retry = '/adm/login?username='.$form->{'uname'}.
                    153:                 '&domain='.$form->{'udom'};
                    154:     if (exists($form->{role})) {
                    155:         $retry .= '&role='.$form->{role};
                    156:     }
                    157:     if (exists($form->{symb})) {
                    158:         $retry .= '&symb='.$form->{symb};
                    159:     }
1.74      albertel  160:     my $end_page   = &Apache::loncommon::end_page();
                    161:     &Apache::loncommon::content_type($r,'text/html');
                    162:     $r->send_http_header;
1.92      bisitz    163:     $r->print(
                    164:        $start_page
                    165:       .'<h1>'.&mt('Sorry ...').'</h1>'
1.95      bisitz    166:       .'<p class="LC_warning">'.&mt($message).'</p>'
1.100     raeburn   167:       .'<p>'.&mt('Please [_1]log in again[_2].','<a href="'.$retry.'">','</a>')
1.92      bisitz    168:       .'</p>'
                    169:       .'<p><a href="/adm/loginproblems.html">'.&mt('Login problems?').'</a></p>'
                    170:       .$end_page
                    171:     );
                    172:  }
1.60      www       173: 
1.55      www       174: # ------------------------------------------------------------------ Rerouting!
                    175: 
                    176: sub reroute {
1.74      albertel  177:     my ($r) = @_;
                    178:     &Apache::loncommon::content_type($r,'text/html');
                    179:     $r->send_http_header;
1.92      bisitz    180:     my $msg='<h1>'.&mt('Sorry ...').'</h1>'
                    181:            .&mt('Please [_1]log in again[_2].');
1.74      albertel  182:     &Apache::loncommon::simple_error_page($r,'Rerouting',$msg);
1.55      www       183: }
                    184: 
1.1       albertel  185: # ---------------------------------------------------------------- Main handler
                    186: 
                    187: sub handler {
                    188:     my $r = shift;
1.85      albertel  189:     my $form;
1.55      www       190: # Are we re-routing?
                    191:     if (-e '/home/httpd/html/lon-status/reroute.txt') {
                    192: 	&reroute($r);
                    193: 	return OK;
                    194:     }
1.56      www       195: 
1.57      www       196:     &Apache::lonlocal::get_language_handle($r);
1.1       albertel  197: 
1.59      www       198: # -------------------------------- Prevent users from attempting to login twice
1.89      albertel  199:     my $handle = &Apache::lonnet::check_for_valid_session($r);
                    200:     if ($handle ne '') {
1.103     raeburn   201:         my $lonidsdir=$r->dir_config('lonIDsDir');
                    202:         if ($handle=~/^publicuser\_/) {
                    203: # For "public user" - remove it, we apparently really want to login
                    204:             unlink($r->dir_config('lonIDsDir')."/$handle.id");
                    205:         } else {
1.59      www       206: # Indeed, a valid token is found
1.103     raeburn   207:             &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);
                    208: 	    &Apache::loncommon::content_type($r,'text/html');
                    209: 	    $r->send_http_header;
                    210: 	    my $start_page = 
                    211: 	        &Apache::loncommon::start_page('Already logged in');
                    212: 	    my $end_page = 
                    213: 	        &Apache::loncommon::end_page();
                    214:             $r->print(
                    215:                $start_page
                    216:               .'<h1>'.&mt('You are already logged in!').'</h1>'
                    217:               .'<p>'.&mt('Please either [_1]continue the current session[_2] or [_3]log out[_4].'
1.92      bisitz    218:                     ,'<a href="/adm/roles">','</a>','<a href="/adm/logout">','</a>')
1.103     raeburn   219:               .'</p>'
                    220:               .$end_page
                    221:             );
                    222:             return OK;
                    223:         }
1.59      www       224:     }
                    225: 
                    226: # ---------------------------------------------------- No valid token, continue
                    227: 
                    228: 
1.1       albertel  229:     my $buffer;
1.84      albertel  230:     if ($r->header_in('Content-length') > 0) {
                    231: 	$r->read($buffer,$r->header_in('Content-length'),0);
                    232:     }
1.85      albertel  233:     my %form;
                    234:     foreach my $pair (split(/&/,$buffer)) {
                    235:        my ($name,$value) = split(/=/,$pair);
1.7       www       236:        $value =~ tr/+/ /;
                    237:        $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
1.85      albertel  238:        $form{$name}=$value;
1.1       albertel  239:     } 
                    240: 
1.85      albertel  241:     if ((!$form{'uname'}) || (!$form{'upass0'}) || (!$form{'udom'})) {
                    242: 	&failed($r,'Username, password and domain need to be specified.',
                    243: 		\%form);
1.1       albertel  244:         return OK;
                    245:     }
1.61      www       246: 
                    247: # split user logging in and "su"-user
                    248: 
1.85      albertel  249:     ($form{'uname'},$form{'suname'})=split(/\:/,$form{'uname'});
1.87      albertel  250:     $form{'uname'} = &LONCAPA::clean_username($form{'uname'});
                    251:     $form{'suname'}= &LONCAPA::clean_username($form{'suname'});
                    252:     $form{'udom'}  = &LONCAPA::clean_domain(  $form{'udom'});
1.1       albertel  253: 
                    254:     my $role   = $r->dir_config('lonRole');
                    255:     my $domain = $r->dir_config('lonDefDomain');
                    256:     my $prodir = $r->dir_config('lonUsersDir');
1.93      raeburn   257:     my $contact_name = &mt('LON-CAPA helpdesk');
1.1       albertel  258: 
1.8       www       259: # ---------------------------------------- Get the information from login token
                    260: 
1.85      albertel  261:     my $tmpinfo=Apache::lonnet::reply('tmpget:'.$form{'logtoken'},
                    262:                                       $form{'serverid'});
1.8       www       263: 
                    264:     if (($tmpinfo=~/^error/) || ($tmpinfo eq 'con_lost')) {
1.85      albertel  265: 	&failed($r,'Information needed to verify your login information is missing, inaccessible or expired.',\%form);
1.8       www       266:         return OK;
1.44      www       267:     } else {
1.85      albertel  268: 	my $reply = &Apache::lonnet::reply('tmpdel:'.$form{'logtoken'},
                    269: 					   $form{'serverid'});
1.77      albertel  270:         if ( $reply ne 'ok' ) {
1.85      albertel  271:             &failed($r,'Session could not be opened.',\%form);
                    272: 	    &Apache::lonnet::logthis("ERROR got a reply of $reply when trying to contact ". $form{'serverid'}." to get login token");
1.77      albertel  273: 	    return OK;
1.44      www       274: 	}
1.8       www       275:     }
1.100     raeburn   276: 
1.93      raeburn   277:     if (!&Apache::lonnet::domain($form{'udom'})) {
                    278:         &failed($r,'The domain you provided is not a valid LON-CAPA domain.',\%form);
                    279:         return OK;
                    280:     }
1.100     raeburn   281: 
                    282:     my ($key,$firsturl,$rolestr,$symbstr)=split(/&/,$tmpinfo);
                    283:     if ($rolestr) {
                    284:         $rolestr = &unescape($rolestr);
                    285:     }
                    286:     if ($symbstr) {
                    287:         $symbstr= &unescape($symbstr);
                    288:     }
                    289:     if ($rolestr =~ /^role=/) {
                    290:         (undef,$form{'role'}) = split('=',$rolestr);
                    291:     }
                    292:     if ($symbstr =~ /^symb=/) { 
                    293:         (undef,$form{'symb'}) = split('=',$symbstr);
                    294:     }
1.8       www       295: 
                    296:     my $keybin=pack("H16",$key);
                    297: 
1.26      harris41  298:     my $cipher;
                    299:     if ($Crypt::DES::VERSION>=2.03) {
                    300: 	$cipher=new Crypt::DES $keybin;
                    301:     }
                    302:     else {
                    303: 	$cipher=new DES $keybin;
                    304:     }
1.67      www       305:     my $upass='';
                    306:     for (my $i=0;$i<=2;$i++) {
                    307: 	my $chunk=
1.85      albertel  308: 	    $cipher->decrypt(unpack("a8",pack("H16",substr($form{'upass'.$i},0,16))));
1.8       www       309: 
1.67      www       310: 	$chunk.=
1.85      albertel  311: 	    $cipher->decrypt(unpack("a8",pack("H16",substr($form{'upass'.$i},16,16))));
1.8       www       312: 
1.67      www       313: 	$chunk=substr($chunk,1,ord(substr($chunk,0,1)));
                    314: 	$upass.=$chunk;
                    315:     }
1.8       www       316: 
1.1       albertel  317: # ---------------------------------------------------------------- Authenticate
1.91      raeburn   318:     my @cancreate;
1.90      raeburn   319:     my %domconfig = &Apache::lonnet::get_dom('configuration',['usercreation'],$form{'udom'});
                    320:     if (ref($domconfig{'usercreation'}) eq 'HASH') {
                    321:         if (ref($domconfig{'usercreation'}{'cancreate'}) eq 'HASH') {
1.91      raeburn   322:             if (ref($domconfig{'usercreation'}{'cancreate'}{'selfcreate'}) eq 'ARRAY') {
                    323:                 @cancreate = @{$domconfig{'usercreation'}{'cancreate'}{'selfcreate'}};
                    324:             } elsif (($domconfig{'usercreation'}{'cancreate'}{'selfcreate'} ne 'none') && 
                    325:                      ($domconfig{'usercreation'}{'cancreate'}{'selfcreate'} ne '')) {
                    326:                 @cancreate = ($domconfig{'usercreation'}{'cancreate'}{'selfcreate'});
1.90      raeburn   327:             }
                    328:         }
                    329:     }
                    330:     my $defaultauth;
1.91      raeburn   331:     if (grep(/^login$/,@cancreate)) {
1.90      raeburn   332:         $defaultauth = 1;
                    333:     }
                    334:     my $authhost=Apache::lonnet::authenticate($form{'uname'},$upass,
                    335:                                               $form{'udom'},$defaultauth);
1.1       albertel  336:     
                    337: # --------------------------------------------------------------------- Failed?
                    338: 
                    339:     if ($authhost eq 'no_host') {
1.85      albertel  340: 	&failed($r,'Username and/or password could not be authenticated.',
                    341: 		\%form);
1.1       albertel  342:         return OK;
1.90      raeburn   343:     } elsif ($authhost eq 'no_account_on_host') {
                    344:         my %domconfig = 
                    345:             &Apache::lonnet::get_dom('configuration',['usercreation'],$form{'udom'});
1.91      raeburn   346:         if (grep(/^login$/,@cancreate)) {
1.90      raeburn   347:             my $start_page = 
1.104   ! droeschl  348:                 &Apache::loncommon::start_page('Create a user account in LON-CAPA');
1.90      raeburn   349:             my $domdesc = &Apache::lonnet::domain($form{'udom'},'description');
1.93      raeburn   350:             my $lonhost = $r->dir_config('lonHostID');
                    351:             my $origmail = $Apache::lonnet::perlvar{'lonSupportEMail'};
                    352:             my $contacts = 
                    353:                 &Apache::loncommon::build_recipient_list(undef,'helpdeskmail',
                    354:                                                         $form{'udom'},$origmail);
                    355:             my ($contact_email) = split(',',$contacts); 
1.94      raeburn   356:             my $output = &Apache::createaccount::username_check($form{'uname'}, 
                    357:                                                                 $form{'udom'},$domdesc,'',
                    358:                                                                 $lonhost,$contact_email,$contact_name);
1.90      raeburn   359:             &Apache::loncommon::content_type($r,'text/html');
                    360:             $r->send_http_header;
                    361:             &Apache::createaccount::print_header($r,$start_page);
1.94      raeburn   362:             $r->print('<h3>'.&mt('Account creation').'</h3>'.
                    363:                       &mt('Although your username and password were authenticated, you do not currently have a LON-CAPA account at this institution.').'<br />'.
                    364:                       $output.&Apache::loncommon::end_page());
1.90      raeburn   365:             return OK;
                    366:         } else {
                    367:             &failed($r,'Although your username and password were authenticated, you do not currently have a LON-CAPA account in this domain, and you are not permitted to create one.',\%form);
                    368:             return OK;
                    369:         }
1.1       albertel  370:     }
                    371: 
1.59      www       372:     if (($firsturl eq '') || 
                    373: 	($firsturl=~/^\/adm\/(logout|remote)/)) {
1.24      www       374: 	$firsturl='/adm/roles';
1.7       www       375:     }
1.61      www       376: # --------------------------------- Are we attempting to login as somebody else?
1.85      albertel  377:     if ($form{'suname'}) {
1.61      www       378: # ------------ see if the original user has enough privileges to pull this stunt
1.85      albertel  379: 	if (&Apache::lonnet::privileged($form{'uname'},$form{'udom'})) {
1.61      www       380: # ---------------------------------------------------- see if the su-user exists
1.85      albertel  381: 	    unless (&Apache::lonnet::homeserver($form{'suname'},$form{'udom'})
1.61      www       382: 		eq 'no_host') {
1.85      albertel  383: 		&Apache::lonnet::logthis(&Apache::lonnet::homeserver($form{'suname'},$form{'udom'}));
1.61      www       384: # ------------------------------ see if the su-user is not too highly privileged
1.85      albertel  385: 		unless (&Apache::lonnet::privileged($form{'suname'},$form{'udom'})) {
1.61      www       386: # -------------------------------------------------------- actually switch users
1.85      albertel  387: 		    &Apache::lonnet::logperm('User '.$form{'uname'}.' at '.$form{'udom'}.
                    388: 			' logging in as '.$form{'suname'});
                    389: 		    $form{'uname'}=$form{'suname'};
1.61      www       390: 		} else {
                    391: 		    &Apache::lonnet::logthis('Attempted switch user to privileged user');
                    392: 		}
                    393: 	    }
                    394: 	} else {
                    395: 	    &Apache::lonnet::logthis('Non-privileged user attempting switch user');
                    396: 	}
                    397:     }
1.85      albertel  398: 
1.81      albertel  399:     if ($r->dir_config("lonBalancer") eq 'yes') {
1.85      albertel  400: 	&success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef,
                    401: 		 \%form);
1.81      albertel  402: 	$r->internal_redirect('/adm/switchserver');
                    403:     } else {
1.85      albertel  404: 	&success($r,$form{'uname'},$form{'udom'},$authhost,$firsturl,undef,
                    405: 		 \%form);
1.81      albertel  406:     }
1.1       albertel  407:     return OK;
                    408: }
                    409: 
                    410: 1;
                    411: __END__
1.7       www       412: 
                    413: 

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