--- loncom/auth/lonauth.pm 2001/06/02 16:10:04 1.19 +++ loncom/auth/lonauth.pm 2006/09/19 21:36:24 1.83 @@ -1,118 +1,193 @@ # 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, -# 7/1,7/10,10/2,10/5,10/9,10/26,10/30,11/10, -# 05/28,05/29 Gerd Kortemeyer +# +# $Id: lonauth.pm,v 1.83 2006/09/19 21:36:24 albertel 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 Apache::File; use CGI qw(:standard); use CGI::Cookie(); +use DynaLoader; # for Crypt::DES version use Crypt::DES; -use Apache::lonnet(); +use Apache::loncommon(); +use Apache::lonnet; use Apache::lonmenu(); use Fcntl qw(:flock); +use Apache::lonlocal; +use GDBM_File; +my %FORM; + # ------------------------------------------------------------ Successful login sub success { - my ($r, $username, $domain, $authhost,$lowerurl) = @_; + my ($r, $username, $domain, $authhost, $lowerurl, $extra_env) = @_; my $lonids=$r->dir_config('lonIDsDir'); + my $public=($username eq 'public' && $domain eq 'public'); + # See if old ID present, if so, remove - my $filename; - opendir(DIR,$lonids); - while ($filename=readdir(DIR)) { - if ($filename=~/^$username\_\d+\_$domain\_$authhost\.id$/) { - unlink($lonids.'/'.$filename); - } - } - closedir(DIR); + my ($filename,$cookie,$userroles); + my $now=time; -# Give them a new cookie + if ($public) { + my $max_public=100; + my $oldest; + my $oldest_time=0; + for(my $next=1;$next<=$max_public;$next++) { + if (-e $lonids."/publicuser_$next.id") { + my $mtime=(stat($lonids."/publicuser_$next.id"))[9]; + if ($mtime<$oldest_time || !$oldest_time) { + $oldest_time=$mtime; + $oldest=$next; + } + } else { + $cookie="publicuser_$next"; + last; + } + } + if (!$cookie) { $cookie="publicuser_$oldest"; } + } else { + opendir(DIR,$lonids); + while ($filename=readdir(DIR)) { + if ($filename=~/^$username\_\d+\_$domain\_$authhost\.id$/) { + unlink($lonids.'/'.$filename); + } + } + closedir(DIR); - my $cookie; - my $now=time; - $cookie="$username\_$now\_$domain\_$authhost"; +# Give them a new cookie + $cookie="$username\_$now\_$domain\_$authhost"; + # Initialize roles - my $userroles=Apache::lonnet::rolesinit($domain,$username,$authhost); - + $userroles=&Apache::lonnet::rolesinit($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/i) { $clientos='win'; } + my ($httpbrowser,$clientbrowser,$clientversion,$clientmathml, + $clientunicode,$clientos) = &Apache::loncommon::decode_user_agent($r); +# -------------------------------------- Any accessibility options to remember? + if (($FORM{'interface'}) && ($FORM{'remember'} eq 'true')) { + foreach ('imagesuppress','appletsuppress', + 'embedsuppress','fontenhance','blackwhite') { + if ($FORM{$_} eq 'true') { + &Apache::lonnet::put('environment',{$_ => 'on'}, + $domain,$username); + } else { + &Apache::lonnet::del('environment',[$_],$domain,$username); + } + } + } # ------------------------------------------------------------- Get environment - my $userenv=Apache::lonnet::reply("dump:$domain:$username:environment", - $authhost); - if (($userenv eq 'con_lost') || - ($userenv =~ /^error\:/)) { - $userenv=''; - } - $userenv=~s/\&/\nenvironment\./g; - if ($userenv ne '') { - $userenv='environment.'.$userenv; + my %userenv=Apache::lonnet::dump('environment',$domain,$username); + my ($tmp) = keys(%userenv); + if ($tmp !~ /^(con_lost|error|no_such_host)/i) { + # default remote control to off + if ($userenv{'remote'} ne 'on') { $userenv{'remote'} = 'off'; } + } else { + undef(%userenv); + } + if (($userenv{'interface'}) && (!$FORM{'interface'})) { + $FORM{'interface'}=$userenv{'interface'}; + } + $env{'environment.remote'}=$userenv{'remote'}; + if ($userenv{'texengine'} eq 'ttm') { $clientmathml=1; } + +# --------------- Do not trust query string to be put directly into environment + foreach ('imagesuppress','appletsuppress', + 'embedsuppress','fontenhance','blackwhite', + 'interface','localpath','localres') { + $FORM{$_}=~s/[\n\r\=]//gs; } # --------------------------------------------------------- Write first profile - { - my $idf=Apache::File->new(">$lonids/$cookie.id"); - unless (flock($idf,LOCK_EX)) { - &Apache::lonnet::logthis("WARNING: ". - 'Could not obtain exclusive lock in lonauth: '.$!); - $idf->close(); - return 'error: '.$!; - } - if ($userenv ne '') { print $idf "$userenv\n"; } - 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"; - print $idf "request.course.fn=\n"; - print $idf "request.course.uri=\n"; - print $idf "request.course.sec=\n"; - print $idf "request.role=cm\n"; - print $idf "request.host=$ENV{'HTTP_HOST'}\n"; - if ($userroles ne '') { print $idf "$userroles"; } - $idf->close(); + { + my %initial_env = + ("user.name" => $username, + "user.domain" => $domain, + "user.home" => $authhost, + "browser.type" => $clientbrowser, + "browser.version" => $clientversion, + "browser.mathml" => $clientmathml, + "browser.unicode" => $clientunicode, + "browser.os" => $clientos, + "server.domain" => $r->dir_config('lonDefDomain'), + "request.course.fn" => '', + "request.course.uri" => '', + "request.course.sec" => '', + "request.role" => 'cm', + "request.role.adv" => $env{'user.adv'}, + "request.host" => $ENV{'REMOTE_ADDR'},); + + if ($FORM{'localpath'}) { + $initial_env{"browser.localpath"} = $FORM{'localpath'}; + $initial_env{"browser.localres"} = $FORM{'localres'}; } - $ENV{'request.role'}='cm'; + + if ($public) { + $initial_env{"environment.remote"} = "off"; + } + if ($FORM{'interface'}) { + $FORM{'interface'}=~s/\W//gs; + $initial_env{"browser.interface"} = $FORM{'interface'}; + $env{'browser.interface'}=$FORM{'interface'}; + foreach my $option ('imagesuppress','appletsuppress', + 'embedsuppress','fontenhance','blackwhite') { + if (($FORM{$option} eq 'true') || + ($userenv{$option} eq 'on')) { + $initial_env{"browser.$option"} = "on"; + } + } + } + + $env{'user.environment'} = "$lonids/$cookie.id"; + + if (tie(my %disk_env,'GDBM_File',"$lonids/$cookie.id", + &GDBM_WRCREAT(),0640)) { + &add_to_env(\%disk_env,\%initial_env); + &add_to_env(\%disk_env,\%userenv,'environment.'); + &add_to_env(\%disk_env,$userroles); + &add_to_env(\%disk_env,$extra_env); + untie(%disk_env); + } else { + &Apache::lonnet::logthis("WARNING: ". + 'Could not create environment storage in lonauth: '.$!); + return 'error: '.$!; + } + } + $env{'request.role'}='cm'; + $env{'request.role.adv'}=$env{'user.adv'}; + $env{'browser.type'}=$clientbrowser; # -------------------------------------------------------------------- Log this &Apache::lonnet::log($domain,$username,$authhost, @@ -120,106 +195,160 @@ sub success { # ------------------------------------------------- Check for critical messages - my @what=&Apache::lonnet::dump('critical'); + my @what=&Apache::lonnet::dump('critical',$domain,$username); if ($what[0]) { - if ($what[0] ne 'con_lost') { - $lowerurl='/adm/email/critical/'.$what[0]; + if (($what[0] ne 'con_lost') && ($what[0]!~/^error\:/)) { + $lowerurl='/adm/email?critical=display'; } } # ------------------------------------------------------------ Get cookie ready + if ($public or $lowerurl eq 'noredirect') { return $cookie; } + $cookie="lonID=$cookie; path=/"; # -------------------------------------------------------- Menu script and info - my $windowinfo=&Apache::lonmenu::open(); -# ------------------------------------------------------------- Info for Remote - my $configmenu=&Apache::lonmenu::rawconfig(); + my $windowinfo=&Apache::lonmenu::open($clientos); + 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 - $r->send_cgi_header(<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' => 'Problems', + 'log' => 'loginproblems.html', + ); $r->print(< - -Successful Login to the LearningOnline Network with CAPA - - - - +$start_page +$setflags $windowinfo -

Welcome!

- - +

$lt{'wel'}

+$lt{'mes'}.

+$lt{'pro'}?

+$remoteinfo +$maincall +$continuelink +$end_page ENDSUCCESS } +sub add_to_env { + my ($idf,$env_data,$prefix) = @_; + while (my ($key,$value) = each(%$env_data)) { + $idf->{$prefix.$key} = $value; + $env{$prefix.$key} = $value; + } +} + # --------------------------------------------------------------- Failed login! sub failed { my ($r,$message) = @_; - $r->send_cgi_header(< 1,}); + my $end_page = &Apache::loncommon::end_page(); + + my %lt=('sorry' => &mt('Sorry ...'), + 'please' => + &mt('Please [_1]log in again[_2].', + "", + ''), + 'problemspage' => &mt('loginproblems.html'), + 'problems' => 'Problems', + ); + &Apache::loncommon::content_type($r,'text/html'); + $r->send_http_header; -ENDFHEADER $r->print(< - -Unsuccessful Login to the LearningOnline Network with CAPA - - - -

Sorry ...

-

$message to use the LearningOnline Network with CAPA

- - +$start_page +

$lt{'sorry'}

+

$message

+

$lt{'please'}

+

+$lt{'problems'}

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

Sorry ...

+ Please log in again.'; + &Apache::loncommon::simple_error_page($r,'Rerouting',$msg); +} + # ---------------------------------------------------------------- Main handler sub handler { my $r = shift; +# Are we re-routing? + if (-e '/home/httpd/html/lon-status/reroute.txt') { + &reroute($r); + return OK; + } + + &Apache::lonlocal::get_language_handle($r); + +# -------------------------------- Prevent users from attempting to login twice + my %cookies=CGI::Cookie->parse($r->header_in('Cookie')); + my $lonid=$cookies{'lonID'}; + my $cookie; + if ($lonid) { + my $handle=$lonid->value; + $handle=~s/\W//g; + my $lonidsdir=$r->dir_config('lonIDsDir'); + if ((-e "$lonidsdir/$handle.id") && ($handle ne '')) { +# Indeed, a valid token is found + &Apache::loncommon::content_type($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(<You are already logged in +

Please either continue the current session or +logout.

+

+Problems?

+$end_page +ENDFAILED + return OK; + } + } + +# ---------------------------------------------------- No valid token, continue + + my $buffer; - $r->read($buffer,$r->header_in('Content-length')); + $r->read($buffer,$r->header_in('Content-length'),0); my @pairs=split(/&/,$buffer); - my $pair; my $name; my $value; my %FORM; + my $pair; my $name; my $value; + undef %FORM; + %FORM=(); foreach $pair (@pairs) { ($name,$value) = split(/=/,$pair); $value =~ tr/+/ /; @@ -227,11 +356,16 @@ sub handler { $FORM{$name}=$value; } - if ((!$FORM{'uname'}) || (!$FORM{'upass'}) || (!$FORM{'udom'})) { - failed($r,'Username, password and domain need to be specified'); + if ((!$FORM{'uname'}) || (!$FORM{'upass0'}) || (!$FORM{'udom'})) { + failed($r,'Username, password and domain need to be specified.'); return OK; } + +# split user logging in and "su"-user + + ($FORM{'uname'},$FORM{'suname'})=split(/\:/,$FORM{'uname'}); $FORM{'uname'} =~ s/\W//g; + $FORM{'suname'} =~ s/\W//g; $FORM{'udom'} =~ s/\W//g; my $role = $r->dir_config('lonRole'); @@ -244,23 +378,39 @@ sub handler { $FORM{'serverid'}); if (($tmpinfo=~/^error/) || ($tmpinfo eq 'con_lost')) { - failed($r,'Login token missing, inaccessible or expired'); + failed($r,'Information needed to verify your login information is missing, inaccessible or expired.'); return OK; + } else { + my $reply = &Apache::lonnet::reply('tmpdel:'.$FORM{'logtoken'}, + $FORM{'serverid'}); + if ( $reply ne 'ok' ) { + &failed($r,'Session could not be opened.'); + &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)))); + 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)))); - $upass.=$cipher->decrypt( - unpack("a8",pack("H16",substr($FORM{'upass'},16,16)))); + $chunk.= + $cipher->decrypt(unpack("a8",pack("H16",substr($FORM{'upass'.$i},16,16)))); - $upass=substr($upass,1,ord(substr($upass,0,1))); + $chunk=substr($chunk,1,ord(substr($chunk,0,1))); + $upass.=$chunk; + } # ---------------------------------------------------------------- Authenticate my $authhost=Apache::lonnet::authenticate($FORM{'uname'}, @@ -270,15 +420,42 @@ sub handler { # --------------------------------------------------------------------- Failed? if ($authhost eq 'no_host') { - failed($r,'Username and/or password could not be authenticated'); + failed($r,'Username and/or password could not be authenticated.'); return OK; } - if (($firsturl eq '') || ($firsturl eq '/adm/logout')) { - $firsturl='/res/adm/pages/index.html'; + if (($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'); + $r->internal_redirect('/adm/switchserver'); + } else { + &success($r,$FORM{'uname'},$FORM{'udom'},$authhost,$firsturl); } - - success($r,$FORM{'uname'},$FORM{'udom'},$authhost,$firsturl); return OK; }