loncom/auth/lonauth.pm - view

File: [LON-CAPA] / loncom / auth / lonauth.pm
Revision 1.121.2.13: download - view: text, annotated - select for diffs
Mon Jan 26 22:25:41 2015 UTC (9 years, 11 months ago) by raeburn
Branches: version_2_11_X
CVS tags: version_2_11_1

- For 2.11
  - Backport 1.137

# The LearningOnline Network # User Authentication Module # # $Id: lonauth.pm,v 1.121.2.13 2015/01/26 22:25:41 raeburn Exp $ # # Copyright Michigan State University Board of Trustees # # This file is part of the LearningOnline Network with CAPA (LON-CAPA). # # LON-CAPA is free software; you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation; either version 2 of the License, or # (at your option) any later version. # # LON-CAPA is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # # You should have received a copy of the GNU General Public License # along with LON-CAPA; if not, write to the Free Software # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA # # /home/httpd/html/adm/gpl.txt # # http://www.lon-capa.org/ # package Apache::lonauth; use strict; use LONCAPA; use Apache::Constants qw(:common); use CGI qw(:standard); use DynaLoader; # for Crypt::DES version use Crypt::DES; use Apache::loncommon(); use Apache::lonnet; use Apache::lonmenu(); use Apache::createaccount; use Fcntl qw(:flock); use Apache::lonlocal; use Apache::File(); use HTML::Entities; # ------------------------------------------------------------ Successful login sub success { my ($r, $username, $domain, $authhost, $lowerurl, $extra_env, $form) = @_; # ------------------------------------------------------------ Get cookie ready my $cookie = &Apache::loncommon::init_user_environment($r, $username, $domain, $authhost, $form, {'extra_env' => $extra_env,}); my $public=($username eq 'public' && $domain eq 'public'); if ($public or $lowerurl eq 'noredirect') { return $cookie; } # -------------------------------------------------------------------- Log this &Apache::lonnet::log($domain,$username,$authhost, "Login $ENV{'REMOTE_ADDR'}"); # ------------------------------------------------- Check for critical messages my @what=&Apache::lonnet::dump('critical',$domain,$username); if ($what[0]) { if (($what[0] ne 'con_lost') && ($what[0]!~/^error\:/)) { $lowerurl='/adm/email?critical=display'; } } # ------------------------------------------------------------ Get cookie ready $cookie="lonID=$cookie; path=/"; # -------------------------------------------------------- Menu script and info my $destination = $lowerurl; if (defined($form->{role})) { my $envkey = 'user.role.'.$form->{role}; my $now=time; my $then=$env{'user.login.time'}; my $refresh=$env{'user.refresh.time'}; my $update=$env{'user.update.time'}; if (!$update) { $update = $then; } if (exists($env{$envkey})) { my ($role,$where,$trolecode,$tstart,$tend,$tremark,$tstatus); &Apache::lonnet::role_status($envkey,$update,$refresh,$now,\$role,\$where, \$trolecode,\$tstatus,\$tstart,\$tend); if ($tstatus eq 'is') { $destination .= ($destination =~ /\?/) ? '&' : '?'; my $newrole = &HTML::Entities::encode($form->{role},'"<>&'); $destination .= 'selectrole=1&'.$newrole.'=1'; } } } if (defined($form->{symb})) { my $destsymb = $form->{symb}; $destination .= ($destination =~ /\?/) ? '&' : '?'; if ($destsymb =~ /___/) { # FIXME Need to deal with encrypted symbs and urls as needed. my ($map,$resid,$desturl)=split(/___/,$destsymb); $desturl = &Apache::lonnet::clutter($desturl); $desturl = &HTML::Entities::encode($desturl,'"<>&'); $destsymb = &HTML::Entities::encode($destsymb,'"<>&'); $destination .= 'destinationurl='.$desturl. '&destsymb='.$destsymb; } else { $destsymb = &HTML::Entities::encode($destsymb,'"<>&'); $destination .= 'destinationurl='.$destsymb; } } if ($destination =~ m{^/adm/roles}) { $destination .= ($destination =~ /\?/) ? '&' : '?'; $destination .= 'source=login'; } my $windowinfo=&Apache::lonmenu::open($env{'browser.os'}); my $startupremote=&Apache::lonmenu::startupremote($destination); my $remoteinfo=&Apache::lonmenu::load_remote_msg($lowerurl); my $setflags=&Apache::lonmenu::setflags(); my $maincall=&Apache::lonmenu::maincall(); my $brcrum = [{'href' => '', 'text' => 'Successful Login'},]; my $start_page=&Apache::loncommon::start_page('Successful Login', $startupremote, {'no_inline_link' => 1, 'bread_crumbs' => $brcrum,}); my $end_page =&Apache::loncommon::end_page(); my $continuelink; if ($env{'environment.remote'} eq 'off') { $continuelink='<a href="'.$destination.'">'.&mt('Continue').'</a>'; } # ------------------------------------------------- Output for successful login &Apache::loncommon::content_type($r,'text/html'); $r->header_out('Set-cookie' => $cookie); $r->send_http_header; my %lt=&Apache::lonlocal::texthash( 'wel' => 'Welcome', 'pro' => 'Login problems?', ); my $loginhelp = &loginhelpdisplay($domain); if ($loginhelp) { $loginhelp = '<p><a href="'.$loginhelp.'">'.$lt{'pro'}.'</a></p>'; } my $welcome = &mt('Welcome to the Learning[_1]Online[_2] Network with CAPA. Please wait while your session is being set up.','<i>','</i>'); $r->print(<<ENDSUCCESS); $start_page $setflags $windowinfo <h1>$lt{'wel'}</h1> $welcome $loginhelp $remoteinfo $maincall $continuelink $end_page ENDSUCCESS return; } # --------------------------------------------------------------- Failed login! sub failed { my ($r,$message,$form) = @_; (undef,undef,undef,my $clientmathml,my $clientunicode) = &Apache::loncommon::decode_user_agent(); my $args = {}; if ($clientunicode && !$clientmathml) { $args = {'browser.unicode' => 1}; } my $start_page = &Apache::loncommon::start_page('Unsuccessful Login',undef,$args); my $uname = &Apache::loncommon::cleanup_html($form->{'uname'}); my $udom = &Apache::loncommon::cleanup_html($form->{'udom'}); if (&Apache::lonnet::domain($udom,'description') eq '') { undef($udom); } my $retry = '/adm/login'; if ($uname eq $form->{'uname'}) { $retry .= '?username='.$uname; } if ($udom) { $retry .= (($retry=~/\?/)?'&':'?').'domain='.$udom; } if (exists($form->{role})) { my $role = &Apache::loncommon::cleanup_html($form->{role}); if ($role ne '') { $retry .= (($retry=~/\?/)?'&':'?').'role='.$role; } } if (exists($form->{symb})) { my $symb = &Apache::loncommon::cleanup_html($form->{symb}); if ($symb ne '') { $retry .= (($retry=~/\?/)?'&':'?').'symb='.$symb; } } my $end_page = &Apache::loncommon::end_page(); &Apache::loncommon::content_type($r,'text/html'); $r->send_http_header; my @actions = (&mt('Please [_1]log in again[_2].','<a href="'.$retry.'">','</a>')); my $loginhelp = &loginhelpdisplay($udom); if ($loginhelp) { push(@actions, '<a href="'.$loginhelp.'">'.&mt('Login problems?').'</a>'); } #FIXME: link to helpdesk might be added here $r->print( $start_page .'<h2>'.&mt('Sorry ...').'</h2>' .&Apache::lonhtmlcommon::confirm_success(&mt($message),1).'<br /><br />' .&Apache::lonhtmlcommon::actionbox(\@actions) .$end_page ); } # ------------------------------------------------------------------ Rerouting! sub reroute { my ($r) = @_; &Apache::loncommon::content_type($r,'text/html'); $r->send_http_header; my $msg='<b>'.&mt('Sorry ...').'</b><br />' .&mt('Please [_1]log in again[_2].'); &Apache::loncommon::simple_error_page($r,'Rerouting',$msg,{'no_auto_mt_msg' => 1}); } # ---------------------------------------------------------------- Main handler sub handler { my $r = shift; my $londocroot = $r->dir_config('lonDocRoot'); my $form; # Are we re-routing? if (-e "$londocroot/lon-status/reroute.txt") { &reroute($r); return OK; } &Apache::lonlocal::get_language_handle($r); # -------------------------------- Prevent users from attempting to login twice my $handle = &Apache::lonnet::check_for_valid_session($r); if ($handle ne '') { my $lonidsdir=$r->dir_config('lonIDsDir'); if ($handle=~/^publicuser\_/) { # For "public user" - remove it, we apparently really want to login unlink($r->dir_config('lonIDsDir')."/$handle.id"); } else { # Indeed, a valid token is found &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle); &Apache::loncommon::content_type($r,'text/html'); $r->send_http_header; my $start_page = &Apache::loncommon::start_page('Already logged in'); my $end_page = &Apache::loncommon::end_page(); my $dest = '/adm/roles'; if ($env{'form.firsturl'} ne '') { $dest = $env{'form.firsturl'}; } $r->print( $start_page .'<p class="LC_warning">'.&mt('You are already logged in!').'</p>' .'<p>'.&mt('Please either [_1]continue the current session[_2] or [_3]log out[_4].' ,'<a href="'.$dest.'">','</a>','<a href="/adm/logout">','</a>') .'</p>' .$end_page ); return OK; } } # ---------------------------------------------------- No valid token, continue my $buffer; if ($r->header_in('Content-length') > 0) { $r->read($buffer,$r->header_in('Content-length'),0); } my %form; foreach my $pair (split(/&/,$buffer)) { my ($name,$value) = split(/=/,$pair); $value =~ tr/+/ /; $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg; $form{$name}=$value; } if ((!$form{'uname'}) || (!$form{'upass0'}) || (!$form{'udom'})) { &failed($r,'Username, password and domain need to be specified.', \%form); return OK; } # split user logging in and "su"-user ($form{'uname'},$form{'suname'})=split(/\:/,$form{'uname'}); $form{'uname'} = &LONCAPA::clean_username($form{'uname'}); $form{'suname'}= &LONCAPA::clean_username($form{'suname'}); $form{'udom'} = &LONCAPA::clean_domain( $form{'udom'}); my $role = $r->dir_config('lonRole'); my $domain = $r->dir_config('lonDefDomain'); my $prodir = $r->dir_config('lonUsersDir'); my $contact_name = &mt('LON-CAPA helpdesk'); # ---------------------------------------- Get the information from login token my $tmpinfo=Apache::lonnet::reply('tmpget:'.$form{'logtoken'}, $form{'serverid'}); if (($tmpinfo=~/^error/) || ($tmpinfo eq 'con_lost') || ($tmpinfo eq 'no_such_host')) { &failed($r,'Information needed to verify your login information is missing, inaccessible or expired.',\%form); return OK; } else { my $reply = &Apache::lonnet::reply('tmpdel:'.$form{'logtoken'}, $form{'serverid'}); if ( $reply ne 'ok' ) { &failed($r,'Session could not be opened.',\%form); &Apache::lonnet::logthis("ERROR got a reply of $reply when trying to contact ". $form{'serverid'}." to get login token"); return OK; } } if (!&Apache::lonnet::domain($form{'udom'})) { &failed($r,'The domain you provided is not a valid LON-CAPA domain.',\%form); return OK; } my ($key,$firsturl,$rolestr,$symbstr,$iptokenstr)=split(/&/,$tmpinfo); if ($rolestr) { $rolestr = &unescape($rolestr); } if ($symbstr) { $symbstr= &unescape($symbstr); } if ($iptokenstr) { $iptokenstr = &unescape($iptokenstr); } if ($rolestr =~ /^role=/) { (undef,$form{'role'}) = split('=',$rolestr); } if ($symbstr =~ /^symb=/) { (undef,$form{'symb'}) = split('=',$symbstr); } if ($iptokenstr =~ /^iptoken=/) { (undef,$form{'iptoken'}) = split('=',$iptokenstr); } my $keybin=pack("H16",$key); my $cipher; if ($Crypt::DES::VERSION>=2.03) { $cipher=new Crypt::DES $keybin; } else { $cipher=new DES $keybin; } my $upass=''; for (my $i=0;$i<=2;$i++) { my $chunk= $cipher->decrypt(unpack("a8",pack("H16",substr($form{'upass'.$i},0,16)))); $chunk.= $cipher->decrypt(unpack("a8",pack("H16",substr($form{'upass'.$i},16,16)))); $chunk=substr($chunk,1,ord(substr($chunk,0,1))); $upass.=$chunk; } # ---------------------------------------------------------------- Authenticate my %domconfig = &Apache::lonnet::get_dom('configuration',['usercreation'],$form{'udom'}); my ($cancreate,$statustocreate) = &Apache::createaccount::get_creation_controls($form{'udom'},$domconfig{'usercreation'}); my $defaultauth; if (ref($cancreate) eq 'ARRAY') { if (grep(/^login$/,@{$cancreate})) { $defaultauth = 1; } } my $clientcancheckhost = 1; my $authhost=Apache::lonnet::authenticate($form{'uname'},$upass, $form{'udom'},$defaultauth, $clientcancheckhost); # --------------------------------------------------------------------- Failed? if ($authhost eq 'no_host') { &failed($r,'Username and/or password could not be authenticated.', \%form); return OK; } elsif ($authhost eq 'no_account_on_host') { if ($defaultauth) { my $domdesc = &Apache::lonnet::domain($form{'udom'},'description'); unless (&check_can_host($r,\%form,'no_account_on_host',$domdesc)) { return OK; } my $start_page = &Apache::loncommon::start_page('Create a user account in LON-CAPA', '',{'no_inline_link' => 1,}); my $lonhost = $r->dir_config('lonHostID'); my $origmail = $Apache::lonnet::perlvar{'lonSupportEMail'}; my $contacts = &Apache::loncommon::build_recipient_list(undef,'helpdeskmail', $form{'udom'},$origmail); my ($contact_email) = split(',',$contacts); my $output = &Apache::createaccount::username_check($form{'uname'},$form{'udom'}, $domdesc,'',$lonhost, $contact_email,$contact_name, undef,$statustocreate); &Apache::loncommon::content_type($r,'text/html'); $r->send_http_header; &Apache::createaccount::print_header($r,$start_page); $r->print('<h3>'.&mt('Account creation').'</h3>'. &mt('Although your username and password were authenticated, you do not currently have a LON-CAPA account at this institution.').'<br />'. $output.&Apache::loncommon::end_page()); return OK; } else { &failed($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); return OK; } } if (($firsturl eq '') || ($firsturl=~/^\/adm\/(logout|remote)/)) { $firsturl='/adm/roles'; } my $hosthere; if ($form{'iptoken'}) { my %sessiondata = &Apache::lonnet::tmpget($form{'iptoken'}); my $delete = &Apache::lonnet::tmpdel($form{'iptoken'}); if (($sessiondata{'domain'} eq $form{'udom'}) && ($sessiondata{'username'} eq $form{'uname'})) { $hosthere = 1; } } # --------------------------------- Are we attempting to login as somebody else? if ($form{'suname'}) { # ------------ see if the original user has enough privileges to pull this stunt if (&Apache::lonnet::privileged($form{'uname'},$form{'udom'})) { # ---------------------------------------------------- see if the su-user exists unless (&Apache::lonnet::homeserver($form{'suname'},$form{'udom'}) eq 'no_host') { &Apache::lonnet::logthis(&Apache::lonnet::homeserver($form{'suname'},$form{'udom'})); # ------------------------------ see if the su-user is not too highly privileged unless (&Apache::lonnet::privileged($form{'suname'},$form{'udom'})) { # -------------------------------------------------------- actually switch users &Apache::lonnet::logperm('User '.$form{'uname'}.' at '.$form{'udom'}. ' logging in as '.$form{'suname'}); $form{'uname'}=$form{'suname'}; } else { &Apache::lonnet::logthis('Attempted switch user to privileged user'); } } } else { &Apache::lonnet::logthis('Non-privileged user attempting switch user'); } } my ($is_balancer,$otherserver); unless ($hosthere) { ($is_balancer,$otherserver) = &Apache::lonnet::check_loadbalancing($form{'uname'},$form{'udom'}); } if ($is_balancer) { if (!$otherserver) { ($otherserver) = &Apache::lonnet::choose_server($form{'udom'}); } if ($otherserver) { &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef, \%form); my $switchto = '/adm/switchserver?otherserver='.$otherserver; if (($firsturl) && ($firsturl ne '/adm/switchserver') && ($firsturl ne '/adm/roles')) { $switchto .= '&origurl='.$firsturl; } if ($form{'role'}) { $switchto .= '&role='.$form{'role'}; } if ($form{'symb'}) { $switchto .= '&symb='.$form{'symb'}; } $r->internal_redirect($switchto); } else { $r->print(&noswitch()); } return OK; } else { if (!&check_can_host($r,\%form,$authhost)) { my ($otherserver) = &Apache::lonnet::choose_server($form{'udom'}); if ($otherserver) { &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef, \%form); my $switchto = '/adm/switchserver?otherserver='.$otherserver; if (($firsturl) && ($firsturl ne '/adm/switchserver') && ($firsturl ne '/adm/roles')) { $switchto .= '&origurl='.$firsturl; } if ($form{'role'}) { $switchto .= '&role='.$form{'role'}; } if ($form{'symb'}) { $switchto .= '&symb='.$form{'symb'}; } $r->internal_redirect($switchto); } else { $r->print(&noswitch()); } return OK; } # ------------------------------------------------------- Do the load balancing # ---------------------------------------------------------- Determine own load my $loadlim = $r->dir_config('lonLoadLim'); my $loadavg; { my $loadfile=Apache::File->new('/proc/loadavg'); $loadavg=<$loadfile>; } $loadavg =~ s/\s.*//g; my $loadpercent=sprintf("%.1f",100*$loadavg/$loadlim); my $userloadpercent=&Apache::lonnet::userload(); # ---------------------------------------------------------- Are we overloaded? if ((($userloadpercent>100.0)||($loadpercent>100.0))) { my $unloaded=Apache::lonnet::spareserver($loadpercent,$userloadpercent,1,$form{'udom'}); if (!$unloaded) { ($unloaded) = &Apache::lonnet::choose_server($form{'udom'}); } if ($unloaded) { &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect', undef,\%form); $r->internal_redirect('/adm/switchserver?otherserver='.$unloaded.'&origurl='.$firsturl); return OK; } } &success($r,$form{'uname'},$form{'udom'},$authhost,$firsturl,undef, \%form); return OK; } } sub check_can_host { my ($r,$form,$authhost,$domdesc) = @_; return unless (ref($form) eq 'HASH'); my $canhost = 1; my $lonhost = $r->dir_config('lonHostID'); my $udom = $form->{'udom'}; my @intdoms; my $internet_names = &Apache::lonnet::get_internet_names($lonhost); if (ref($internet_names) eq 'ARRAY') { @intdoms = @{$internet_names}; } my $uprimary_id = &Apache::lonnet::domain($udom,'primary'); my $uint_dom = &Apache::lonnet::internet_dom($uprimary_id); unless ($uint_dom ne '' && grep(/^\Q$uint_dom\E$/,@intdoms)) { my $machine_dom = &Apache::lonnet::host_domain($lonhost); my $hostname = &Apache::lonnet::hostname($lonhost); my $serverhomeID = &Apache::lonnet::get_server_homeID($hostname); my $serverhomedom = &Apache::lonnet::host_domain($serverhomeID); my %defdomdefaults = &Apache::lonnet::get_domain_defaults($serverhomedom); my %udomdefaults = &Apache::lonnet::get_domain_defaults($udom); my $loncaparev; if ($authhost eq 'no_account_on_host') { $loncaparev = &Apache::lonnet::get_server_loncaparev($machine_dom); } else { $loncaparev = &Apache::lonnet::get_server_loncaparev($machine_dom,$lonhost); } $canhost = &Apache::lonnet::can_host_session($udom,$lonhost,$loncaparev, $udomdefaults{'remotesessions'}, $defdomdefaults{'hostedsessions'}); } unless ($canhost) { if ($authhost eq 'no_account_on_host') { my $checkloginvia = 1; my ($login_host,$hostname) = &Apache::lonnet::choose_server($udom,$checkloginvia); &Apache::loncommon::content_type($r,'text/html'); $r->send_http_header; if ($login_host ne '') { my $protocol = $Apache::lonnet::protocol{$login_host}; $protocol = 'http' if ($protocol ne 'https'); my $newurl = $protocol.'://'.$hostname.'/adm/createaccount'; $r->print(&Apache::loncommon::start_page('Create a user account in LON-CAPA'). '<h3>'.&mt('Account creation').'</h3>'. &mt('You do not currently have a LON-CAPA account at this institution.').'<br />'. '<p>'.&mt('You will be able to create one by logging into a LON-CAPA server within the [_1] domain.',$domdesc).'</p>'. '<p>'.&mt('[_1]Log in[_2]','<a href="'.$newurl.'">','</a>'). &Apache::loncommon::end_page()); } else { $r->print(&Apache::loncommon::start_page('Access to LON-CAPA unavailable'). '<h3>'.&mt('Account creation unavailable').'</h3>'. &mt('You do not currently have a LON-CAPA account at this institution.').'<br />'. '<p>'.&mt('Currently a LON-CAPA server is not available within the [_1] domain for you to log-in to, to create an account.',$domdesc).'</p>'. &Apache::loncommon::end_page()); } } else { &success($r,$form->{'uname'},$udom,$authhost,'noredirect',undef, $form); my ($otherserver) = &Apache::lonnet::choose_server($udom); $r->internal_redirect('/adm/switchserver?otherserver='.$otherserver); } } return $canhost; } sub noswitch { my $result = &Apache::loncommon::start_page('Access to LON-CAPA unavailable'). '<h3>'.&mt('Session unavailable').'</h3>'. &mt('This LON-CAPA server is unable to host your session.').'<br />'. '<p>'.&mt('Currently no other LON-CAPA server is available to host your session either.').'</p>'. &Apache::loncommon::end_page(); return $result; } sub loginhelpdisplay { my ($authdomain) = @_; my $login_help = 1; my $lang = &Apache::lonlocal::current_language(); if ($login_help) { my $dom = $authdomain; if ($dom eq '') { $dom = &Apache::lonnet::default_login_domain(); } my %domconfhash = &Apache::loncommon::get_domainconf($dom); my $loginhelp_url; if ($lang) { $loginhelp_url = $domconfhash{$dom.'.login.helpurl_'.$lang}; if ($loginhelp_url ne '') { return $loginhelp_url; } } $loginhelp_url = $domconfhash{$dom.'.login.helpurl_nolang'}; if ($loginhelp_url ne '') { return $loginhelp_url; } else { return '/adm/loginproblems.html'; } } return; } 1; __END__