--- loncom/auth/lonauth.pm 2008/10/01 11:11:08 1.95 +++ loncom/auth/lonauth.pm 2020/10/15 03:09:40 1.160 @@ -1,359 +1,899 @@ -# The LearningOnline Network -# User Authentication Module -# -# $Id: lonauth.pm,v 1.95 2008/10/01 11:11:08 bisitz 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; - -# ------------------------------------------------------------ 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 $windowinfo=&Apache::lonmenu::open($env{'browser.os'}); - my $startupremote=&Apache::lonmenu::startupremote($lowerurl); - my $remoteinfo=&Apache::lonmenu::load_remote_msg($lowerurl); - my $setflags=&Apache::lonmenu::setflags(); - my $maincall=&Apache::lonmenu::maincall(); - my $start_page=&Apache::loncommon::start_page('Successful Login', - $startupremote, - {'no_inline_link' => 1,}); - my $end_page =&Apache::loncommon::end_page(); - - my $continuelink; - if (($env{'browser.interface'} eq 'textual') || - ($env{'environment.remote'} eq 'off')) { - $continuelink="".&mt('Continue').""; - } -# ------------------------------------------------- Output for successful login - - &Apache::loncommon::content_type($r,'text/html'); - $r->header_out('Set-cookie' => $cookie); - $r->send_http_header; - - my %lt=&Apache::lonlocal::texthash( - 'wel' => 'Welcome', - 'mes' => 'Welcome to the LearningOnline Network with CAPA. Please wait while your session is being set up.', - 'pro' => 'Login problems?', - 'log' => 'loginproblems.html', - ); - $r->print(<$lt{'wel'} -$lt{'mes'}

-$lt{'pro'}

-$remoteinfo -$maincall -$continuelink -$end_page -ENDSUCCESS -} - -# --------------------------------------------------------------- Failed login! - -sub failed { - my ($r,$message,$form) = @_; - my $start_page = &Apache::loncommon::start_page('Unsuccessful Login',undef, - {'no_inline_link' => 1,}); - my $end_page = &Apache::loncommon::end_page(); - &Apache::loncommon::content_type($r,'text/html'); - sleep 1; # brute force counteraction: slow down attackers, which try to hack user authentication with automated scripts - $r->send_http_header; - $r->print( - $start_page - .'

'.&mt('Sorry ...').'

' - .'

'.&mt($message).'

' - .'

'.&mt('Please [_1]log in again[_2].' - ,"{'uname'}&domain=$form->{'udom'}\">",'') - .'

' - .'

'.&mt('Login problems?').'

' - .$end_page - ); - } - -# ------------------------------------------------------------------ Rerouting! - -sub reroute { - my ($r) = @_; - &Apache::loncommon::content_type($r,'text/html'); - $r->send_http_header; - my $msg='

'.&mt('Sorry ...').'

' - .&mt('Please [_1]log in again[_2].'); - &Apache::loncommon::simple_error_page($r,'Rerouting',$msg); -} - -# ---------------------------------------------------------------- Main handler - -sub handler { - my $r = shift; - my $form; -# Are we re-routing? - if (-e '/home/httpd/html/lon-status/reroute.txt') { - &reroute($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 ($handle ne '') { -# Indeed, a valid token is found - &Apache::loncommon::content_type($r,'text/html'); - $r->send_http_header; - my $start_page = - &Apache::loncommon::start_page('Already logged in'); - my $end_page = - &Apache::loncommon::end_page(); - $r->print( - $start_page - .'

'.&mt('You are already logged in!').'

' - .'

'.&mt('Please either [_1]continue the current session[_2] or [_3]logout[_4].' - ,'','','','') - .'

' - .'

'.&mt('Login problems?').'

' - .$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/) || ($tmpinfo eq 'con_lost')) { - &failed($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,$firsturl)=split(/&/,$tmpinfo); - - 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 @cancreate; - my %domconfig = &Apache::lonnet::get_dom('configuration',['usercreation'],$form{'udom'}); - if (ref($domconfig{'usercreation'}) eq 'HASH') { - if (ref($domconfig{'usercreation'}{'cancreate'}) eq 'HASH') { - if (ref($domconfig{'usercreation'}{'cancreate'}{'selfcreate'}) eq 'ARRAY') { - @cancreate = @{$domconfig{'usercreation'}{'cancreate'}{'selfcreate'}}; - } elsif (($domconfig{'usercreation'}{'cancreate'}{'selfcreate'} ne 'none') && - ($domconfig{'usercreation'}{'cancreate'}{'selfcreate'} ne '')) { - @cancreate = ($domconfig{'usercreation'}{'cancreate'}{'selfcreate'}); - } - } - } - my $defaultauth; - if (grep(/^login$/,@cancreate)) { - $defaultauth = 1; - } - my $authhost=Apache::lonnet::authenticate($form{'uname'},$upass, - $form{'udom'},$defaultauth); - -# --------------------------------------------------------------------- Failed? - - if ($authhost eq 'no_host') { - &failed($r,'Username and/or password could not be authenticated.', - \%form); - return OK; - } elsif ($authhost eq 'no_account_on_host') { - my %domconfig = - &Apache::lonnet::get_dom('configuration',['usercreation'],$form{'udom'}); - if (grep(/^login$/,@cancreate)) { - my $start_page = - &Apache::loncommon::start_page('Create a user account in LON-CAPA', - '',{'no_inline_link' => 1,}); - my $domdesc = &Apache::lonnet::domain($form{'udom'},'description'); - 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,$contact_name); - &Apache::loncommon::content_type($r,'text/html'); - $r->send_http_header; - &Apache::createaccount::print_header($r,$start_page); - $r->print('

'.&mt('Account creation').'

'. - &mt('Although your username and password were authenticated, you do not currently have a LON-CAPA account at this institution.').'
'. - $output.&Apache::loncommon::end_page()); - return OK; - } else { - &failed($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)/)) { - $firsturl='/adm/roles'; - } -# --------------------------------- Are we attempting to login as somebody else? - if ($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'); - } - } - - if ($r->dir_config("lonBalancer") eq 'yes') { - &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef, - \%form); - $r->internal_redirect('/adm/switchserver'); - } else { - &success($r,$form{'uname'},$form{'udom'},$authhost,$firsturl,undef, - \%form); - } - return OK; -} - -1; -__END__ - - +# The LearningOnline Network +# User Authentication Module +# +# $Id: lonauth.pm,v 1.160 2020/10/15 03:09:40 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 qw(:DEFAULT :match); +use Apache::Constants qw(:common); +use CGI qw(:standard); +use Apache::loncommon(); +use Apache::lonnet; +use Apache::lonmenu(); +use Apache::createaccount; +use Apache::ltiauth; +use Fcntl qw(:flock); +use Apache::lonlocal; +use Apache::File(); +use HTML::Entities; +use Digest::MD5; + +# ------------------------------------------------------------ Successful login +sub success { + my ($r, $username, $domain, $authhost, $lowerurl, $extra_env, + $form,$skipcritical,$cid) = @_; + +# ------------------------------------------------------------ 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 $ENV{'REMOTE_ADDR'}"); + +# ------------------------------------------------- Check for critical messages + + unless ($skipcritical) { + my @what=&Apache::lonnet::dump('critical',$domain,$username); + if ($what[0]) { + if (($what[0] ne 'con_lost') && ($what[0]!~/^error\:/)) { + $lowerurl='/adm/email?critical=display'; + } + } + } + +# ----------------------------------------------------------- Get cookies ready + my ($securecookie,$defaultcookie); + my $ssl = $r->subprocess_env('https'); + if ($ssl) { + $securecookie="lonSID=$cookie; path=/; HttpOnly; secure"; + my $lonidsdir=$r->dir_config('lonIDsDir'); + if (($lonidsdir) && (-e "$lonidsdir/$cookie.id")) { + my $linkname=substr(Digest::MD5::md5_hex(Digest::MD5::md5_hex(time(). {}. rand(). $$)), 0, 32).'_linked'; + if (-e "$lonidsdir/$linkname.id") { + unlink("$lonidsdir/$linkname.id"); + } + my $made_symlink = eval { symlink("$lonidsdir/$cookie.id", + "$lonidsdir/$linkname.id"); 1 }; + if ($made_symlink) { + $defaultcookie = "lonLinkID=$linkname; path=/; HttpOnly;"; + &Apache::lonnet::appenv({'user.linkedenv' => $linkname}); + } + } + } else { + $defaultcookie = "lonID=$cookie; path=/; HttpOnly;"; + } +# -------------------------------------------------------- Menu script and info + my $destination = $lowerurl; + if ($env{'request.lti.login'}) { + if (($env{'request.lti.reqcrs'}) && ($env{'request.lti.reqrole'} eq 'cc')) { + &Apache::loncommon::content_type($r,'text/html'); + if ($securecookie) { + $r->headers_out->add('Set-cookie' => $securecookie); + } + if ($defaultcookie) { + $r->headers_out->add('Set-cookie' => $defaultcookie); + } + $r->send_http_header; + if (ref($form) eq 'HASH') { + $form->{'lti.login'} = $env{'request.lti.login'}; + $form->{'lti.reqcrs'} = $env{'request.lti.reqcrs'}; + $form->{'lti.reqrole'} = $env{'request.lti.reqrole'}; + $form->{'lti.sourcecrs'} = $env{'request.lti.sourcecrs'}; + } + &Apache::ltiauth::lti_reqcrs($r,$domain,$form,$username,$domain); + return; + } + if ($env{'request.lti.selfenrollrole'}) { + if (&Apache::ltiauth::lti_enroll($username,$domain, + $env{'request.lti.selfenrollrole'}) eq 'ok') { + $form->{'role'} = $env{'request.lti.selfenrollrole'}; + &Apache::lonnet::delenv('request.lti.selfenrollrole'); + } else { + &Apache::ltiauth::invalid_request($r,24); + } + } + } + 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}; + my $encrypted; + if ($destsymb =~ m{^/enc/}) { + $encrypted = 1; + if ($cid) { + $destsymb = &Apache::lonenc::unencrypted($destsymb,$cid); + } + } + $destination .= ($destination =~ /\?/) ? '&' : '?'; + if ($destsymb =~ /___/) { + my ($map,$resid,$desturl)=split(/___/,$destsymb); + $desturl = &Apache::lonnet::clutter($desturl); + if ($encrypted) { + $desturl = &Apache::lonenc::encrypted($desturl,1,$cid); + $destsymb = $form->{symb}; + } + $desturl = &HTML::Entities::encode($desturl,'"<>&'); + $destsymb = &HTML::Entities::encode($destsymb,'"<>&'); + $destination .= 'destinationurl='.$desturl. + '&destsymb='.$destsymb; + } elsif (!$encrypted) { + $destsymb = &HTML::Entities::encode($destsymb,'"<>&'); + $destination .= 'destinationurl='.$destsymb; + } + } + if ($destination =~ m{^/adm/roles}) { + $destination .= ($destination =~ /\?/) ? '&' : '?'; + $destination .= 'source=login'; + } + + my $windowname = 'loncapaclient'; + if ($env{'request.lti.login'}) { + $windowname .= 'lti'; + } + my $windowinfo = Apache::lonhtmlcommon::scripttag('self.name="'.$windowname.'";'); + my $brcrum = [{'href' => '', + 'text' => 'Successful Login'},]; + my $args = {'bread_crumbs' => $brcrum,}; + unless ((defined($form->{role})) || (defined($form->{symb}))) { + my $update=$env{'user.update.time'}; + if (!$update) { + $update = $env{'user.login.time'}; + } + my %roles_in_env; + my $showcount = &Apache::lonroles::roles_from_env(\%roles_in_env,$update); + if ($showcount == 1) { + foreach my $rolecode (keys(%roles_in_env)) { + my ($cid) = ($rolecode =~ m{^\Quser.role.st./\E($match_domain/$match_courseid)(?:/|$)}); + if ($cid) { + my %coursedescription = + &Apache::lonnet::coursedescription($cid,{'one_time' => '1'}); + if ($coursedescription{'type'} eq 'Placement') { + $args->{'crstype'} = 'Placement'; + } + last; + } + } + } + } + +# ------------------------------------------------- Output for successful login + + &Apache::loncommon::content_type($r,'text/html'); + if ($securecookie) { + $r->headers_out->add('Set-cookie' => $securecookie); + } + if ($defaultcookie) { + $r->headers_out->add('Set-cookie' => $defaultcookie); + } + $r->send_http_header; + + my ($start_page,$js,$pagebody,$end_page); + if ($env{'request.lti.login'}) { + $args = {'only_body' => 1}; + if ($env{'request.lti.target'} eq '') { + my $ltitarget = (($destination =~ /\?/) ? '&' : '?'). + 'ltitarget=iframe'; + $js = <<"ENDJS"; + + + +ENDJS + $args->{'add_entries'} = {'onload' => "javascript:setLTItarget();"}; + $pagebody = ''; + } else { + $args->{'redirect'} = [0,$destination,1]; + } + $start_page=&Apache::loncommon::start_page('',$js,$args); + } else { + $args->{'redirect'} = [0,$destination]; + $start_page=&Apache::loncommon::start_page('Successful Login', + $js,$args); + + my %lt=&Apache::lonlocal::texthash( + 'wel' => 'Welcome', + 'pro' => 'Login problems?', + ); + $pagebody = "

$lt{'wel'}

\n". + &mt('Welcome to the Learning[_1]Online[_2] Network with CAPA. Please wait while your session is being set up.','',''); + my $loginhelp = &loginhelpdisplay($domain); + if ($loginhelp) { + $pagebody .= '

'.$lt{'pro'}.'

'; + } + } + $end_page = &Apache::loncommon::end_page(); + $r->print(< 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='.$symb; + } + } + if (exists($form->{firsturl})) { + my $firsturl = &Apache::loncommon::cleanup_html($form->{firsturl}); + if ($firsturl ne '') { + $retry .= (($retry=~/\?/)?'&':'?').'firsturl='.$firsturl; + if ($firsturl =~ m{^/tiny/$match_domain/\w+$}) { + unless (exists($form->{linkprot})) { + if (exists($form->{linkkey})) { + $retry .= 'linkkey='.$form->{linkkey}; + } + } + } + } + } + if (exists($form->{linkprot})) { + my $ltoken = &Apache::lonnet::tmpput({linkprot => $form->{'linkprot'}}, + $r->dir_config('lonHostID')); + if ($ltoken) { + $retry .= (($retry =~ /\?/) ? '&' : '?').'ltoken='.$ltoken; + } + } + 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].','','')); + my $loginhelp = &loginhelpdisplay($udom); + if ($loginhelp) { + push(@actions, ''.&mt('Login problems?').''); + } + #FIXME: link to helpdesk might be added here + + $r->print( + $start_page + .'

'.&mt('Sorry ...').'

' + .&Apache::lonhtmlcommon::confirm_success(&mt($message),1).'

' + .&Apache::lonhtmlcommon::actionbox(\@actions) + .$end_page + ); + } + +# ------------------------------------------------------------------ Rerouting! + +sub reroute { + my ($r) = @_; + &Apache::loncommon::content_type($r,'text/html'); + $r->send_http_header; + my $msg=''.&mt('Sorry ...').'
' + .&mt('Please [_1]log in again[_2].'); + &Apache::loncommon::simple_error_page($r,'Rerouting',$msg,{'no_auto_mt_msg' => 1}); +} + +# ---------------------------------------------------------------- Main handler + +sub handler { + my $r = shift; + my $londocroot = $r->dir_config('lonDocRoot'); +# Are we re-routing? + if (-e "$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 = $env{'form.firsturl'}; + if ($env{'form.firsturl'} =~ m{^/tiny/$match_domain/\w+$}) { + &Apache::lonnet::appenv({'request.deeplink.login' => $env{'form.firsturl'}}); + } + } + $r->print( + $start_page + .'

'.&mt('You are already logged in!').'

' + .'

'.&mt('Please either [_1]continue the current session[_2] or [_3]log out[_4].' + ,'','','','') + .'

' + .$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'},$form{'suname'},$form{'sudom'})=split(/\:/,$form{'uname'}); + $form{'uname'} = &LONCAPA::clean_username($form{'uname'}); + $form{'suname'}= &LONCAPA::clean_username($form{'suname'}); + $form{'udom'} = &LONCAPA::clean_domain($form{'udom'}); + $form{'sudom'} = &LONCAPA::clean_domain($form{'sudom'}); + + 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,$linkstr)=split(/&/,$tmpinfo); + if ($rolestr) { + $rolestr = &unescape($rolestr); + } + if ($symbstr) { + $symbstr= &unescape($symbstr); + } + if ($iptokenstr) { + $iptokenstr = &unescape($iptokenstr); + } + if ($linkstr) { + $linkstr = &unescape($linkstr); + } + if ($firsturl =~ m{^/tiny/$match_domain/\w+$}) { + $form{'firsturl'} = $firsturl; + } + if ($rolestr =~ /^role=/) { + (undef,$form{'role'}) = split('=',$rolestr); + } + if ($symbstr =~ /^symb=/) { + (undef,$form{'symb'}) = split('=',$symbstr); + } + if ($iptokenstr =~ /^iptoken=/) { + (undef,$form{'iptoken'}) = split('=',$iptokenstr); + } + if ($linkstr =~ /^linkprot=/) { + (undef,$form{'linkprot'}) = split('=',$linkstr); + } elsif ($linkstr =~ /^linkkey=/) { + (undef,$form{'linkkey'}) = split('=',$linkstr); + } + + my $upass = $ENV{HTTPS} ? $form{'upass0'} + : &Apache::loncommon::des_decrypt($key,$form{'upass0'}); + +# ---------------------------------------------------------------- Authenticate + + my %domconfig = &Apache::lonnet::get_dom('configuration',['usercreation'],$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'); + 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('

'.&mt('Account creation').'

'. + &mt('Although your username and password were authenticated, you do not currently have a LON-CAPA account at this institution.').'
'. + $output.&Apache::loncommon::end_page()); + return OK; + } else { + &failed($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'}) { + my ($suname,$sudom,$sudomref); + $suname = $form{'suname'}; + $sudom = $form{'udom'}; + if ($form{'sudom'}) { + unless ($sudom eq $form{'sudom'}) { + if (&Apache::lonnet::domain($form{'sudom'})) { + $sudomref = [$form{'sudom'}]; + $sudom = $form{'sudom'}; + } + } + } +# ------------ see if the original user has enough privileges to pull this stunt + if (&Apache::lonnet::privileged($form{'uname'},$form{'udom'},$sudomref)) { +# ---------------------------------------------------- see if the su-user exists + unless (&Apache::lonnet::homeserver($suname,$sudom) eq 'no_host') { +# ------------------------------ see if the su-user is not too highly privileged + if (&Apache::lonnet::privileged($suname,$sudom)) { + &Apache::lonnet::logthis('Attempted switch user to privileged user'); + } else { + my $noprivswitch; +# +# su-user's home server and user's home server must have one of: +# (a) same domain +# (b) same primary library server for the two domains +# (c) same "internet domain" for primary library server(s) for home servers' domains +# + my $suprim = &Apache::lonnet::domain($sudom,'primary'); + my $suintdom = &Apache::lonnet::internet_dom($suprim); + unless ($sudom eq $form{'udom'}) { + my $uprim = &Apache::lonnet::domain($form{'udom'},'primary'); + my $uintdom = &Apache::lonnet::internet_dom($uprim); + unless ($suprim eq $uprim) { + unless ($suintdom eq $uintdom) { + &Apache::lonnet::logthis('Attempted switch user ' + .'to user with different "internet domain".'); + $noprivswitch = 1; + } + } + } + + unless ($noprivswitch) { +# +# server where log-in occurs must have same "internet domain" as su-user's home +# server +# + my $lonhost = $r->dir_config('lonHostID'); + my $hostintdom = &Apache::lonnet::internet_dom($lonhost); + if ($hostintdom ne $suintdom) { + &Apache::lonnet::logthis('Attempted switch user on a ' + .'server with a different "internet domain".'); + } else { + +# -------------------------------------------------------- actually switch users + + &Apache::lonnet::logperm('User '.$form{'uname'}.' at '. + $form{'udom'}.' logging in as '.$suname.':'.$sudom); + $form{'uname'}=$suname; + if ($form{'udom'} ne $sudom) { + $form{'udom'}=$sudom; + } + } + } + } + } + } 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'},$form{'udom'},'login'); + if ($is_balancer) { + if ($otherserver eq '') { + my $lowest_load; + ($otherserver,undef,undef,undef,$lowest_load) = &Apache::lonnet::choose_server($form{'udom'}); + if ($lowest_load > 100) { + $otherserver = &Apache::lonnet::spareserver($lowest_load,$lowest_load,1,$form{'udom'}); + } + } + if ($otherserver ne '') { + my @hosts = &Apache::lonnet::current_machine_ids(); + if (grep(/^\Q$otherserver\E$/,@hosts)) { + $hosthere = $otherserver; + } + } + } + } + + if (($is_balancer) && (!$hosthere)) { + if ($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; #should escape + } + if ($form{'role'}) { + $switchto .= '&role='.$form{'role'}; + } + if ($form{'symb'}) { + $switchto .= '&symb='.$form{'symb'}; + } + if ($form{'linkprot'}) { + $env{'request.linkprot'} = $form{'linkprot'}; + } elsif ($form{'firsturl'} =~ m{^/tiny/$match_domain/\w+$}) { + if ($form{'linkkey'}) { + $env{'request.linkkey'} = $form{'linkkey'}; + } + $env{'request.deeplink.login'} = $form{'firsturl'}; + } + $r->internal_redirect($switchto); + } else { + &Apache::loncommon::content_type($r,'text/html'); + $r->send_http_header; + $r->print(&noswitch()); + } + return OK; + } else { + if (!&check_can_host($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; #should escape + } + if ($form{'role'}) { + $switchto .= '&role='.$form{'role'}; + } + if ($form{'symb'}) { + $switchto .= '&symb='.$form{'symb'}; + } + if ($form{'linkprot'}) { + $env{'request.linkprot'} = $form{'linkprot'}; + } elsif ($form{'firsturl'} =~ m{^/tiny/$match_domain/\w+$}) { + if ($form{'linkkey'}) { + $env{'request.linkkey'} = $form{'linkkey'}; + } + $env{'request.deeplink.login'} = $form{'firsturl'}; + + } + $r->internal_redirect($switchto); + } else { + &Apache::loncommon::content_type($r,'text/html'); + $r->send_http_header; + $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); + if ($form{'linkprot'}) { + $env{'request.linkprot'} = $form{'linkprot'}; + } elsif ($form{'firsturl'} =~ m{^/tiny/$match_domain/\w+$}) { + if ($form{'linkkey'}) { + $env{'request.linkkey'} = $form{'linkkey'}; + } + $env{'request.deeplink.login'} = $form{'firsturl'}; + } + $r->internal_redirect('/adm/switchserver?otherserver='.$unloaded.'&origurl='.$firsturl); + return OK; + } + } + if (($is_balancer) && ($hosthere)) { + $form{'noloadbalance'} = $hosthere; + } + my $extra_env; + if ($form{'linkprot'}) { + my ($linkprotector,$uri) = split(/:/,$form{'linkprot'},2); + if ($linkprotector) { + $extra_env = {'user.linkprotector' => $linkprotector, + 'user.linkproturi' => $uri,}; + } + } elsif ($form{'firsturl'} =~ m{^/tiny/$match_domain/\w+$}) { + if ($form{'linkkey'}) { + $extra_env = {'user.deeplinkkey' => $form{'linkkey'}, + 'user.keyedlinkuri' => $form{'firsturl'}, + 'request.deeplink.login' => $form{'firsturl'}}; + } else { + $extra_env = {'request.deeplink.login' => $form{'firsturl'}}; + } + } + &success($r,$form{'uname'},$form{'udom'},$authhost,$firsturl,$extra_env, + \%form); + return OK; + } +} + +sub check_can_host { + my ($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'; +#FIXME Should preserve where user was going and linkprot by setting ltoken at $login_host + $r->print(&Apache::loncommon::start_page('Create a user account in LON-CAPA'). + '

'.&mt('Account creation').'

'. + &mt('You do not currently have a LON-CAPA account at this institution.').'
'. + '

'.&mt('You will be able to create one by logging into a LON-CAPA server within the [_1] domain.',$domdesc).'

'. + '

'.&mt('[_1]Log in[_2]','',''). + &Apache::loncommon::end_page()); + } else { + $r->print(&Apache::loncommon::start_page('Access to LON-CAPA unavailable'). + '

'.&mt('Account creation unavailable').'

'. + &mt('You do not currently have a LON-CAPA account at this institution.').'
'. + '

'.&mt('Currently a LON-CAPA server is not available within the [_1] domain for you to log-in to, to create an account.',$domdesc).'

'. + &Apache::loncommon::end_page()); + } + } else { + &success($r,$form->{'uname'},$udom,$authhost,'noredirect',undef, + $form); + if ($form->{'linkprot'}) { + $env{'request.linkprot'} = $form->{'linkprot'}; + } elsif ($form->{'firsturl'} =~ m{^/tiny/$match_domain/\w+$}) { + if ($form->{'linkkey'}) { + $env{'request.linkkey'} = $form->{'linkkey'}; + } + $env{'request.deeplink.login'} = $form->{'firsturl'}; + } + my ($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'). + '

'.&mt('Session unavailable').'

'. + &mt('This LON-CAPA server is unable to host your session.').'
'. + '

'.&mt('Currently no other LON-CAPA server is available to host your session either.').'

'. + &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__ + +