--- loncom/auth/lonauth.pm 2000/06/29 20:43:03 1.8 +++ loncom/auth/lonauth.pm 2023/07/05 17:33:03 1.121.2.24.2.7 @@ -1,206 +1,1201 @@ # The LearningOnline Network # User Authentication Module -# 5/21/99,5/22,5/25,5/26,5/27,5/29,6/2,6/11,6/14,6/15 -# 16/11,12/16, -# 1/14,2/24,2/28,2/29,3/7,5/29,5/30,5/31,6/1,6/5,6/29 Gerd Kortemeyer +# +# $Id: lonauth.pm,v 1.121.2.24.2.7 2023/07/05 17:33:03 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 Apache::File; 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; use CGI::Cookie(); -use Crypt::DES; -use Apache::lonnet(); - + # ------------------------------------------------------------ Successful login - sub success { - my ($r, $username, $domain, $authhost,$lowerurl) = @_; - my $lonids=$r->dir_config('lonIDsDir'); + my ($r, $username, $domain, $authhost, $lowerurl, $extra_env, + $form,$skipcritical,$cid,$expirepub,$write_to_opener) = @_; + +# ------------------------------------------------------------ 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; } -# See if old ID present, if so, remove - my $cookie; - while ($cookie=<$lonids/$username\_*\_$domain\_$authhost.id>) { - unlink($cookie); - } - -# Give them a new cookie - - my $now=time; - $cookie="$username\_$now\_$domain\_$authhost"; - -# Initialize roles - - my $userroles=Apache::lonnet::rolesinit($domain,$username,$authhost); - -# ------------------------------------ Check browser type and MathML capability - - my @browsertype=split(/\&/,$r->dir_config("lonBrowsDet")); - my %mathcap=split(/\&/,$r->dir_config("lonMathML")); - my $httpbrowser=$ENV{"HTTP_USER_AGENT"}; - my $i; - my $clientbrowser='unknown'; - my $clientversion='0'; - my $clientmathml=''; - for ($i=0;$i<=$#browsertype;$i++) { - my ($bname,$match,$notmatch,$vreg,$minv)=split(/\:/,$browsertype[$i]); - if (($httpbrowser=~/$match/i) && ($httpbrowser!~/$notmatch/i)) { - $clientbrowser=$bname; - $httpbrowser=~/$vreg/i; - $clientversion=$1; - $clientmathml=($clientversion>=$minv); - } - } - my $clientos='unknown'; - if (($httpbrowser=~/linux/i) || - ($httpbrowser=~/unix/i) || - ($httpbrowser=~/ux/i) || - ($httpbrowser=~/solaris/i)) { $clientos='unix'; } - if (($httpbrowser=~/vax/i) || - ($httpbrowser=~/vms/i)) { $clientos='vms'; } - if ($httpbrowser=~/next/i) { $clientos='next'; } - if (($httpbrowser=~/mac/i) || - ($httpbrowser=~/powerpc/i)) { $clientos='mac'; } - if ($httpbrowser=~/win/) { $clientos='win'; } - -# --------------------------------------------------------- Write first profile - - { - my $idf=Apache::File->new(">$lonids/$cookie.id"); - print $idf "user.name=$username\n"; - print $idf "user.domain=$domain\n"; - print $idf "user.home=$authhost\n"; - print $idf "browser.type=$clientbrowser\n"; - print $idf "browser.version=$clientversion\n"; - print $idf "browser.mathml=$clientmathml\n"; - print $idf "browser.os=$clientos\n"; - if ($userroles ne '') { print $idf "$userroles" }; - } # -------------------------------------------------------------------- Log this + my $ip = &Apache::lonnet::get_requestor_ip(); &Apache::lonnet::log($domain,$username,$authhost, - "Login $ENV{'REMOTE_ADDR'}"); + "Login $ip"); -# ------------------------------------------------------------ Get cookie ready +# ------------------------------------------------- Check for critical messages + + unless ($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'; + } + } + } elsif (defined($form->{display})) { + if ($destination =~ m{^/adm/email($|\?)}) { + $destination .= ($destination =~ /\?/) ? '&' : '?' .'display='.&escape($form->{display}); + } + } + if (defined($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'; + } - $cookie="lonID=$cookie; path=/"; + my $brcrum = [{'href' => '', + 'text' => 'Successful Login'},]; + my $args = {'no_inline_link' => 1, + 'bread_crumbs' => $brcrum,}; + if (($env{'request.deeplink.login'} eq $lowerurl) && + (($env{'request.linkprot'}) || ($env{'request.linkkey'} ne ''))) { + my %info; + if ($env{'request.linkprot'}) { + $info{'linkprot'} = $env{'request.linkprot'}; + foreach my $item ('linkprotuser','linkprotexit','linkprotpbid','linkprotpburl') { + if ($form->{$item}) { + $info{$item} = $form->{$item}; + } + } + $args = {'only_body' => 1,}; + } elsif ($env{'request.linkkey'} ne '') { + $info{'linkkey'} = $env{'request.linkkey'}; + } + $info{'origurl'} = $lowerurl; + my $token = &Apache::lonnet::tmpput(\%info,$r->dir_config('lonHostID'),'link'); + unless (($token eq 'con_lost') || ($token eq 'refused') || + ($token eq 'unknown_cmd') || ($token eq 'no_such_host')) { + $destination .= (($destination =~ /\?/) ? '&' : '?') . 'ttoken='.$token; + } + } + if (($env{'request.deeplink.login'}) || ($env{'request.lti.login'})) { + if ($env{'environment.remote'} eq 'on') { + &Apache::lonnet::appenv({'environment.remote' => 'off'}); + } + } + my $startupremote; + if ($write_to_opener) { + if ($env{'environment.remote'} eq 'on') { + &Apache::lonnet::appenv({'environment.remote' => 'off'}); + } + $args->{'redirect'} = [0,$destination,'',$write_to_opener]; + } else { + $startupremote=&Apache::lonmenu::startupremote($destination); + } + my $windowinfo=&Apache::lonmenu::open($env{'browser.os'}); + 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', + $startupremote,$args); + my $end_page =&Apache::loncommon::end_page(); + + my $continuelink; + if ($env{'environment.remote'} eq 'off') { + unless ($write_to_opener) { + $continuelink=''.&mt('Continue').''; + } + } # ------------------------------------------------- Output for successful login - $r->send_cgi_header(<print(< - -Successful Login to the LearningOnline Network with CAPA - - - - -

Welcome!

- - + &Apache::loncommon::content_type($r,'text/html'); + if ($securecookie) { + $r->headers_out->add('Set-cookie' => $securecookie); + } + if ($defaultcookie) { + $r->headers_out->add('Set-cookie' => $defaultcookie); + } + if ($expirepub) { + my $c = new CGI::Cookie(-name => 'lonPubID', + -value => '', + -expires => '-10y',); + $r->headers_out->add('Set-cookie' => $c); + } + $r->send_http_header; + + if (($env{'request.linkprot'}) || ($env{'request.lti.login'})) { + $r->print(<$continuelink +$end_page +END + } else { + my %lt=&Apache::lonlocal::texthash( + 'wel' => 'Welcome', + 'pro' => 'Login problems?', + ); + my $loginhelp = &loginhelpdisplay($domain); + if ($loginhelp) { + $loginhelp = '

'.$lt{'pro'}.'

'; + } + + my $welcome = &mt('Welcome to the Learning[_1]Online[_2] Network with CAPA. Please wait while your session is being set up.','',''); + $r->print(<$lt{'wel'} +$welcome +$loginhelp +$remoteinfo +$maincall +$continuelink +$end_page ENDSUCCESS + } + return; } # --------------------------------------------------------------- Failed login! sub failed { - my ($r,$message) = @_; - $r->send_cgi_header(<print(< - -Unsuccessful Login to the LearningOnline Network with CAPA - - - -

Sorry ...

-

$message to use the LearningOnline Network with CAPA

- - -ENDFAILED + my ($r,$message,$form,$authhost) = @_; + (undef,undef,undef,my $clientmathml,my $clientunicode) = + &Apache::loncommon::decode_user_agent(); + my $args = {}; + if ($clientunicode && !$clientmathml) { + $args = {'browser.unicode' => 1}; + } + if ($form->{firsturl} =~ m{^/tiny/$match_domain/\w+$}) { + if ($form->{linkprot}) { + $args->{only_body} = 1; + } + } + + my @actions; + 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 $authtype; + if (($udom ne '') && ($uname ne '') && ($authhost eq 'no_host')) { + $authtype = &Apache::lonnet::queryauthenticate($uname,$udom); + } + my $retry = '/adm/login'; + if (($uname eq $form->{'uname'}) && ($authtype !~ /^lti:/)) { + $retry .= '?username='.$uname; + } + if ($udom) { + $retry .= (($retry=~/\?/)?'&':'?').'domain='.$udom; + } + my $lonhost = $r->dir_config('lonHostID'); + my $querystr; + my $result = &set_retry_token($form,$lonhost,\$querystr); + if ($result eq 'fail') { + 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='.$firsturl; + if ($form->{firsturl} =~ m{^/tiny/$match_domain/\w+$}) { + unless (exists($form->{linkprot})) { + if (exists($form->{linkkey})) { + $retry .= 'linkkey='.$form->{linkkey}; + } + } + } + } + } + if (exists($form->{linkprot})) { + my %info = ( + 'linkprot' => $form->{'linkprot'}, + ); + foreach my $item ('linkprotuser','linkprotexit','linkprotpbid','linkprotpburl') { + if ($form->{$item} ne '') { + $info{$item} = $form->{$item}; + } + } + my $ltoken = &Apache::lonnet::tmpput(\%info, + $r->dir_config('lonHostID'),'retry'); + if ($ltoken) { + $retry .= (($retry =~ /\?/) ? '&' : '?').'ltoken='.$ltoken; + } + } + } elsif ($querystr ne '') { + $retry .= (($retry=~/\?/)?'&':'?').$querystr; + } + my $end_page = &Apache::loncommon::end_page(); + &Apache::loncommon::content_type($r,'text/html'); + $r->send_http_header; + if ($authtype =~ /^lti:/) { + $message = &mt('Direct login is not supported with the username you entered.'). + '

'. + &mt('You likely need to launch LON-CAPA from within a course in a different Learning Management System.'). + '
'. + &mt('You can also try to log in with a different username.'); + @actions = + (&mt('Try your [_1]log in again[_2].','','')); + } else { + $message = &mt($message); + @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($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; + } - my $buffer; - $r->read($buffer,$r->header_in('Content-length')); - my @pairs=split(/&/,$buffer); - my $pair; my $name; my $value; my %FORM; - foreach $pair (@pairs) { - ($name,$value) = split(/=/,$pair); - $value =~ tr/+/ /; - $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg; - $FORM{$name}=$value; - } + &Apache::lonlocal::get_language_handle($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 $dest = '/adm/roles'; + my %form = &get_form_items($r); + if ($form{'logtoken'}) { + my $tmpinfo = &Apache::lonnet::reply('tmpget:'.$form{'logtoken'}, + $form{'serverid'}); + unless (($tmpinfo=~/^error/) || ($tmpinfo eq 'con_lost') || + ($tmpinfo eq 'no_such_host')) { + my ($des_key,$firsturl,@rest)=split(/&/,$tmpinfo); + $firsturl = &unescape($firsturl); + my %info; + foreach my $item (@rest) { + my ($key,$value) = split(/=/,$item); + $info{$key} = &unescape($value); + } + if ($firsturl ne '') { + $info{'firsturl'} = $firsturl; + $dest = $firsturl; + my $relogin; + if ($dest =~ m{^/tiny/$match_domain/\w+$}) { + if ($env{'request.course.id'}) { + my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'}; + my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'}; + my $symb = &Apache::loncommon::symb_from_tinyurl($dest,$cnum,$cdom); + if ($symb) { + unless (&set_deeplink_login(%info) eq 'ok') { + $relogin = 1; + } + } + } + if ($relogin) { + $r->print( + $start_page + .'

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

' + .'

'.&mt('Please [_1]log out[_2] first, and then try your access again', + '','') + .'

' + .$end_page); + } else { + if (($info{'linkprot'}) || ($info{'linkkey'} ne '')) { + if (($info{'linkprot'}) && ($info{'linkprotuser'} ne '')) { + unless ($info{'linkprotuser'} eq $env{'user.name'}.':'.$env{'user.domain'}) { + $r->print( + $start_page + .'

'.&mt('You are already logged in, but as a different user from the one expected for the link you followed from another system').'

' + .'

'.&mt('Please [_1]log out[_2] first, and then try following the link again from the other system', + '','') + + .'

' + .$end_page); + return OK; + } + } + my $token = &Apache::lonnet::tmpput(\%info,$r->dir_config('lonHostID'),'link'); + unless (($token eq 'con_lost') || ($token eq 'refused') || + ($token eq 'unknown_cmd') || ($token eq 'no_such_host')) { + $dest .= (($dest =~ /\?/) ? '&' : '?') . 'ttoken='.$token; + } + } + $r->print( + $start_page + .'

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

' + .'

'.&mt('Please either [_1]continue the current session[_2] or [_3]log out[_4] first, and then try your access again', + '','', + '','') + .'

' + .$end_page); + } + return OK; + } + } + } + } + $r->print( + $start_page + .'

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

' + .'

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

' + .$end_page + ); + return OK; + } + } - if ((!$FORM{'uname'}) || (!$FORM{'upass'}) || (!$FORM{'udom'})) { - failed($r,'Username, password and domain need to be specified'); +# ---------------------------------------------------- No valid token, continue + + my %form = &get_form_items($r); + if ((!$form{'uname'}) || (!$form{'upass0'}) || (!$form{'udom'})) { + &failed($r,'Username, password and domain need to be specified.', + \%form); return OK; } - $FORM{'uname'} =~ s/\W//g; - $FORM{'udom'} =~ s/\W//g; + +# split user logging in and "su"-user + + ($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'}); + my $tmpinfo=Apache::lonnet::reply('tmpget:'.$form{'logtoken'}, + $form{'serverid'}); - if (($tmpinfo=~/^error/) || ($tmpinfo eq 'con_lost')) { - failed($r,'Login token missing, inaccessible or expired'); + 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 ". $form{'serverid'}." to get login token"); + return OK; + } } - - my ($key,$firsturl)=split(/:/,$tmpinfo); - my $keybin=pack("H16",$key); - - my $cipher=new DES $keybin; - - my $upass=$cipher->decrypt( - unpack("a8",pack("H16",substr($FORM{'upass'},0,16)))); - - $upass.=$cipher->decrypt( - unpack("a8",pack("H16",substr($FORM{'upass'},16,16)))); + if (!&Apache::lonnet::domain($form{'udom'})) { + &failed($r,'The domain you provided is not a valid LON-CAPA domain.',\%form); + return OK; + } - $upass=substr($upass,1,ord(substr($upass,0,1))); + my ($des_key,$firsturl,@rest)=split(/&/,$tmpinfo); + $firsturl = &unescape($firsturl); + foreach my $item (@rest) { + my ($key,$value) = split(/=/,$item); + $form{$key} = &unescape($value); + } + if ($firsturl =~ m{^/tiny/$match_domain/\w+$}) { + $form{'firsturl'} = $firsturl; + } + my $upass = &Apache::loncommon::des_decrypt($des_key,$form{'upass0'}); # ---------------------------------------------------------------- Authenticate - my $authhost=Apache::lonnet::authenticate($FORM{'uname'}, - $upass, - $FORM{'udom'}); + + my %domconfig = &Apache::lonnet::get_dom('configuration',['usercreation'],$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'); + my $pwdverify; + if (&Apache::lonnet::homeserver($form{'uname'},$form{'udom'}) eq 'no_host') { + my %possunames = &alternate_unames_check($form{'uname'},$form{'udom'}); + if (keys(%possunames) > 0) { + foreach my $rulematch (keys(%possunames)) { + my $possuname = $possunames{$rulematch}; + if (($possuname ne '') && ($possuname =~ /^$match_username$/)) { + $authhost=Apache::lonnet::authenticate($possuname,$upass, + $form{'udom'},undef, + $clientcancheckhost); + if (($authhost eq 'no_host') || ($authhost eq 'no_account_on_host')) { + next; + } elsif (($authhost ne '') && (&Apache::lonnet::hostname($authhost) ne '')) { + $pwdverify = 1; + &Apache::lonnet::logthis("Authenticated user: $possuname was submitted as: $form{'uname'}"); + $form{'uname'} = $possuname; + last; + } + } + } + } + } + unless ($pwdverify) { + &failed($r,'Username and/or password could not be authenticated.', + \%form,$authhost); + 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('

'.&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,%sessiondata); + if ($form{'iptoken'}) { + %sessiondata = &Apache::lonnet::tmpget($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'); + } + } + + if ($form{'firsturl'} =~ m{^/tiny/$match_domain/\w+$}) { + if (($form{'linkprot'}) && ($form{'linkprotuser'} ne '')) { + unless($form{'linkprotuser'} eq $form{'uname'}.':'.$form{'udom'}) { + delete($form{'udom'}); + delete($form{'uname'}); + &failed($r,'Username and/or domain are different to that expected for the link you followed from another system', + \%form,$authhost); + return OK; + } + } + } + + my ($is_balancer,$otherserver); + + unless ($hosthere) { + ($is_balancer,$otherserver) = + &Apache::lonnet::check_loadbalancing($form{'uname'},$form{'udom'},'login'); + if ($is_balancer) { + # Check if browser sent a LON-CAPA load balancer cookie (and this is a balancer) + my ($found_server,$balancer_cookie) = &Apache::lonnet::check_for_balancer_cookie($r); + if (($found_server) && ($balancer_cookie =~ /^\Q$env{'user.domain'}\E_\Q$env{'user.name'}\E_/)) { + $otherserver = $found_server; + } + if ($otherserver eq '') { + my $lowest_load; + ($otherserver,undef,undef,undef,$lowest_load) = &Apache::lonnet::choose_server($form{'udom'}); + if ($lowest_load > 100) { + $otherserver = &Apache::lonnet::spareserver($r,$lowest_load,$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; + } + if ($form{'role'}) { + $switchto .= '&role='.$form{'role'}; + } + if ($form{'symb'}) { + $switchto .= '&symb='.$form{'symb'}; + } + if ($form{'linkprot'}) { + $env{'request.linkprot'} = $form{'linkprot'}; + foreach my $item ('linkprotuser','linkprotexit','linkprotpbid','linkprotpburl') { + if ($form{$item}) { + $env{'request.'.$item} = $form{$item}; + } + } + } elsif ($form{'linkkey'} ne '') { + $env{'request.linkkey'} = $form{'linkkey'}; + } + if ($form{'firsturl'} =~ m{^/tiny/$match_domain/\w+$}) { + &set_deeplink_login(%form); + } elsif ($firsturl eq '/adm/email') { + if ($form{'display'} && ($form{'mailrecip'} eq "$form{'uname'}:$form{'udom'}")) { + $env{'request.display'} = $form{'display'}; + $env{'request.mailrecip'} = $form{'mailrecip'}; + } + } + $r->internal_redirect($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; + } + if ($form{'role'}) { + $switchto .= '&role='.$form{'role'}; + } + if ($form{'symb'}) { + $switchto .= '&symb='.$form{'symb'}; + } + if ($form{'linkprot'}) { + $env{'request.linkprot'} = $form{'linkprot'}; + foreach my $item ('linkprotuser','linkprotexit','linkprotpbid','linkprotpburl') { + if ($form{$item}) { + $env{'request.'.$item} = $form{$item}; + } + } + } elsif ($form{'linkkey'} ne '') { + $env{'request.linkkey'} = $form{'linkkey'}; + } + if ($form{'firsturl'} =~ m{^/tiny/$match_domain/\w+$}) { + &set_deeplink_login(%form); + } elsif ($firsturl eq '/adm/email') { + if ($form{'display'} && ($form{'mailrecip'} eq "$form{'uname'}:$form{'udom'}")) { + $env{'request.display'} = $form{'display'}; + $env{'request.mailrecip'} = $form{'mailrecip'}; + } + } + $r->internal_redirect($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 $unloaded=Apache::lonnet::spareserver($r,$loadpercent,$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{'linkkey'} ne '') { + $env{'request.linkkey'} = $form{'linkkey'}; + } + if ($form{'firsturl'} =~ m{^/tiny/$match_domain/\w+$}) { + &set_deeplink_login(%form); + } elsif ($firsturl eq '/adm/email') { + if ($form{'display'} && ($form{'mailrecip'} eq "$form{'uname'}:$form{'udom'}")) { + $env{'request.display'} = $form{'display'}; + $env{'request.mailrecip'} = $form{'mailrecip'}; + } + } + $r->internal_redirect('/adm/switchserver?otherserver='.$unloaded.'&origurl='.$firsturl); + return OK; + } + } + if (($is_balancer) && ($hosthere)) { + $form{'noloadbalance'} = $hosthere; + } + my $extra_env; + if (($hosthere) && ($sessiondata{'sessionserver'} ne '')) { + if ($sessiondata{'origurl'} ne '') { + $firsturl = $sessiondata{'origurl'}; + $form{'firsturl'} = $sessiondata{'origurl'}; + my @names = ('role','symb','linkprot','linkkey'); + foreach my $item (@names) { + if ($sessiondata{$item} ne '') { + $form{$item} = $sessiondata{$item}; + } + } + if ($sessiondata{'origurl'} eq '/adm/email') { + if (($sessiondata{'display'}) && ($sessiondata{'mailrecip'})) { + if (&unescape($sessiondata{'mailrecip'}) eq "$form{'uname'}:$form{'udom'}") { + $form{'display'} = &unescape($sessiondata{'display'}); + $form{'mailrecip'} = &unescape($sessiondata{'mailrecip'}); + } + } + } + } + } + if ($form{'linkprot'}) { + my ($linkprotector,$uri) = split(/:/,$form{'linkprot'},2); + if ($linkprotector) { + $extra_env = {'user.linkprotector' => $linkprotector, + 'user.linkproturi' => $uri}; + } + } elsif ($form{'linkkey'} ne '') { + $extra_env = {'user.deeplinkkey' => $form{'linkkey'}, + 'user.keyedlinkuri' => $form{'firsturl'}}; + } + if ($form{'firsturl'} =~ m{^/tiny/$match_domain/\w+$}) { + &set_deeplink_login(%form); + if ($form{'linkprot'}) { + if (ref($extra_env) eq 'HASH') { + %{$extra_env} = ( %{$extra_env}, 'request.linkprot' => $form{'linkprot'} ); + } else { + $extra_env = {'request.linkprot' => $form{'linkprot'}}; + } + if ($form{'linkprotexit'}) { + $extra_env->{'request.linkprotexit'} = $form{'linkprotexit'}; + } + if ($form{'linkprotpbid'}) { + $extra_env->{'request.linkprotpbid'} = $form{'linkprotpbid'}; + } + if ($form{'linkprotpburl'}) { + $extra_env->{'request.linkprotpburl'} = $form{'linkprotpburl'}; + } + } elsif ($form{'linkkey'} ne '') { + if (ref($extra_env) eq 'HASH') { + %{$extra_env} = ( %{$extra_env}, 'request.linkkey' => $form{'linkkey'} ); + } else { + $extra_env = {'request.linkkey' => $form{'linkkey'}}; + } + } + if ($env{'request.deeplink.login'}) { + if (ref($extra_env) eq 'HASH') { + %{$extra_env} = ( %{$extra_env}, 'request.deeplink.login' => $form{'firsturl'} ); + } else { + $extra_env = {'request.deeplink.login' => $form{'firsturl'}}; + } + } + } + &success($r,$form{'uname'},$form{'udom'},$authhost,$firsturl,$extra_env, + \%form); return OK; } +} + +sub get_form_items { + my ($r) = @_; + 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}=$value; + } + return %form; +} - if ($firsturl eq '') { - $firsturl='/res/adm/pages/index.html'; +sub set_deeplink_login { + my (%form) = @_; + my $disallow; + if ($form{'firsturl'} =~ m{^/tiny/($match_domain)/\w+$}) { + my $cdom = $1; + my ($cnum,$symb) = &Apache::loncommon::symb_from_tinyurl($form{'firsturl'},'',$cdom); + if ($symb) { + if ($env{'request.course.id'} eq $cdom.'_'.$cnum) { + my $deeplink; + if ($symb =~ /\.(page|sequence)$/) { + my $mapname = &Apache::lonnet::deversion((&Apache::lonnet::decode_symb($symb))[2]); + my $navmap = Apache::lonnavmaps::navmap->new(); + if (ref($navmap)) { + $deeplink = $navmap->get_mapparam(undef,$mapname,'0.deeplink'); + } + } else { + $deeplink = &Apache::lonnet::EXT('resource.0.deeplink',$symb); + } + if ($deeplink ne '') { + my ($state,$others,$listed,$scope,$protect) = split(/,/,$deeplink); + if (($protect ne 'none') && ($protect ne '')) { + my ($acctype,$item) = split(/:/,$protect); + if ($acctype =~ /lti(c|d)$/) { + unless ($form{'linkprot'} eq $item.$1.':'.$env{'request.deeplink.login'}) { + $disallow = 1; + } + } elsif ($acctype eq 'key') { + unless ($form{'linkkey'} eq $item) { + $disallow = 1; + } + } + } + } + unless ($disallow) { + $env{'request.deeplink.login'} = $form{'firsturl'}; + } + } else { + $env{'request.deeplink.login'} = $form{'firsturl'}; + } + } + } + if ($disallow) { + return; } + return 'ok'; +} + +sub set_retry_token { + my ($form,$lonhost,$querystr) = @_; + if (ref($form) eq 'HASH') { + my ($firsturl,$token,$extras,@names); + @names = ('role','symb','linkprotuser','linkprotexit','linkprot','linkkey','iptoken','linkprotpbid','linkprotpburl'); + foreach my $name (@names) { + if ($form->{$name} ne '') { + $extras .= '&'.$name.'='.&escape($form->{$name}); + last if ($name eq 'linkprot'); + } + } + my $firsturl = $form->{'firsturl'}; + if (($firsturl ne '') || ($extras ne '')) { + $extras .= ':retry'; + $token = &Apache::lonnet::reply('tmpput:'.&escape($firsturl). + $extras,$lonhost); + if (($token eq 'con_lost') || ($token eq 'no_such_host')) { + return 'fail'; + } else { + if (ref($querystr)) { + $$querystr = 'retry='.$token; + } + return 'ok'; + } + } + } + return; +} - success($r,$FORM{'uname'},$FORM{'udom'},$authhost,$firsturl); - 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 $alias = &Apache::lonnet::use_proxy_alias($r,$login_host); + $hostname = $alias if ($alias ne ''); + 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->{'firsturl'} =~ m{^/tiny/$match_domain/\w+$}) { + $env{'request.deeplink.login'} = $form->{'firsturl'}; + } elsif ($form->{'firsturl'} eq '/adm/email') { + if ($form->{'display'} && ($form->{'mailrecip'} eq $form->{'uname'}.':'.$form->{'udom'})) { + $env{'request.display'} = $form->{'mailrecip'}; + $env{'request.mailrecip'} = $form->{'mailrecip'}; + } + } + if ($form->{'linkprot'}) { + $env{'request.linkprot'} = $form->{'linkprot'}; + } elsif ($form->{'linkkey'} ne '') { + $env{'request.linkkey'} = $form->{'linkkey'}; + } + my ($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 $loginhelp_url; + } else { + return '/adm/loginproblems.html'; + } + } + return; +} + +sub alternate_unames_check { + my ($uname,$udom) = @_; + my %possunames; + my %domdefs = &Apache::lonnet::get_domain_defaults($udom); + if (ref($domdefs{'unamemap_rule'}) eq 'ARRAY') { + if (@{$domdefs{'unamemap_rule'}} > 0) { + %possunames = + &Apache::lonnet::inst_rulecheck($udom,$uname,undef, + 'unamemap',$domdefs{'unamemap_rule'}); + } + } + return %possunames; } 1;