--- loncom/auth/lonauth.pm 2000/10/02 19:43:49 1.11 +++ loncom/auth/lonauth.pm 2005/02/26 05:37:23 1.65 @@ -1,18 +1,54 @@ # The LearningOnline Network # User Authentication Module +# +# $Id: lonauth.pm,v 1.65 2005/02/26 05:37:23 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/ +# # 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 Gerd Kortemeyer +# 7/1,7/10,10/2,10/5,10/9,10/26,10/30,11/10, +# 05/28,05/29 Gerd Kortemeyer +# 07/28,08/03 Gerd Kortemeyer +# 8/20 Gerd Kortemeyer package Apache::lonauth; +use strict; 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::loncommon(); use Apache::lonnet(); +use Apache::lonmenu(); +use Fcntl qw(:flock); +use Apache::lonlocal; + +my %FORM; # ------------------------------------------------------------ Successful login @@ -21,13 +57,19 @@ sub success { my $lonids=$r->dir_config('lonIDsDir'); # See if old ID present, if so, remove - my $cookie; - while ($cookie=<$lonids/$username\_*\_$domain\_$authhost.id>) { - unlink($cookie); + + my $filename; + opendir(DIR,$lonids); + while ($filename=readdir(DIR)) { + if ($filename=~/^$username\_\d+\_$domain\_$authhost\.id$/) { + unlink($lonids.'/'.$filename); + } } + closedir(DIR); # Give them a new cookie + my $cookie; my $now=time; $cookie="$username\_$now\_$domain\_$authhost"; @@ -37,89 +79,148 @@ sub success { # ------------------------------------ Check browser type and MathML capability - my @browsertype=split(/\&/,$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 $userenv; + my %userenv=Apache::lonnet::dump('environment',$domain,$username); + my ($tmp) = keys(%userenv); + if ($tmp !~ /^(con_lost|error|no_such_host)/i) { + foreach my $key (keys(%userenv)) { + $userenv.="environment.$key=$userenv{$key}\n"; + } + } + 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/$cookie.id"); - if ($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"; - if ($userroles ne '') { print $idf "$userroles"; } + { + 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 $idf "browser.unicode=$clientunicode\n"; + print $idf "browser.os=$clientos\n"; + if ($FORM{'localpath'}) { + print $idf "browser.localpath=$FORM{'localpath'}\n"; + print $idf "browser.localres=$FORM{'localres'}\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 $idf "request.role.adv=$ENV{'user.adv'}\n"; + print $idf "request.host=$ENV{'REMOTE_ADDR'}\n"; + if ($FORM{'interface'}) { + $FORM{'interface'}=~s/\W//gs; + print $idf "browser.interface=$FORM{'interface'}\n"; + $ENV{'browser.interface'}=$FORM{'interface'}; + foreach ('imagesuppress','appletsuppress', + 'embedsuppress','fontenhance','blackwhite') { + if (($FORM{$_} eq 'true') || + ($userenv{$_} eq 'on')) { + print $idf "browser.$_=on\n"; + } + } + } + if ($userroles ne '') { print $idf "$userroles"; } + $idf->close(); + } + $ENV{'request.role'}='cm'; + $ENV{'request.role.adv'}=$ENV{'user.adv'}; + $ENV{'browser.type'}=$clientbrowser; # -------------------------------------------------------------------- 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 $windowinfo=&Apache::lonmenu::open($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 $bodytag=&Apache::loncommon::bodytag('Successful Login'); + my $add=&addcontent(); + my $continuelink; + if (($ENV{'browser.interface'} eq 'textual') || + ($ENV{'environment.remote'} eq 'off')) { + $continuelink="".&mt('Continue').""; + } # ------------------------------------------------- Output for successful login $r->send_cgi_header(< 'Welcome', + 'mes' => 'Welcome to the LearningOnline Network with CAPA. Please wait while your session is being set up', + 'pro' => 'Problems', + 'log' => 'loginproblems.html', + ); $r->print(< Successful Login to the LearningOnline Network with CAPA - +$startupremote - - -

Welcome!

+$bodytag +$setflags +$windowinfo +

$lt{'wel'}

+$lt{'mes'}.

+$lt{'pro'}?

+$remoteinfo +$maincall +$continuelink ENDSUCCESS @@ -129,8 +230,10 @@ ENDSUCCESS sub failed { my ($r,$message) = @_; + my $bodytag=&Apache::loncommon::bodytag('Unsuccessful Login'); + my $add=&addcontent(); $r->send_cgi_header(<print(< Unsuccessful Login to the LearningOnline Network with CAPA - - +$bodytag

Sorry ...

-

$message to use the LearningOnline Network with CAPA

+

$message

+

Please log in again.

+

+Problems?

ENDFAILED } +# --------------------------------------------------------------------- Charset + +sub addcontent { + my $encoding=&Apache::lonlocal::current_encoding; + if ($encoding) { + return '; charset='.$encoding; + } else { + return ''; + } +} + +# ------------------------------------------------------------------ Rerouting! + +sub reroute { + my $r=shift; + my $bodytag=&Apache::loncommon::bodytag('Rerouting'); + $r->send_cgi_header(<print(< + +Rerouting Login to the LearningOnline Network with CAPA + +$bodytag +

Sorry ...

+Please log in again. + + +ENDRFAILED +} + # ---------------------------------------------------------------- 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 + $r->send_cgi_header(<print(< + +Already logged in + +$bodytag +

You are already logged in

+

Please either continue the current session or +logout.

+

+Problems?

+ + +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); $value =~ tr/+/ /; @@ -164,10 +348,15 @@ sub handler { } if ((!$FORM{'uname'}) || (!$FORM{'upass'}) || (!$FORM{'udom'})) { - failed($r,'Username, password and domain need to be specified'); + failed($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'); @@ -180,15 +369,25 @@ sub handler { $FORM{'serverid'}); if (($tmpinfo=~/^error/) || ($tmpinfo eq 'con_lost')) { - failed($r,'Login token missing, inaccessible or expired'); + failed($r,'Information needed to verify your login information is missing, inaccessible or expired.'); return OK; + } else { + unless (&Apache::lonnet::reply('tmpdel:'.$FORM{'logtoken'}, + $FORM{'serverid'}) eq 'ok') { + &failed($r,'Session could not be opened.'); + } } - my ($key,$firsturl)=split(/&/,$tmpinfo); my $keybin=pack("H16",$key); - my $cipher=new DES $keybin; + my $cipher; + if ($Crypt::DES::VERSION>=2.03) { + $cipher=new Crypt::DES $keybin; + } + else { + $cipher=new DES $keybin; + } my $upass=$cipher->decrypt( unpack("a8",pack("H16",substr($FORM{'upass'},0,16)))); @@ -206,15 +405,37 @@ sub handler { # --------------------------------------------------------------------- Failed? if ($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 '') { - $firsturl='/res/adm/pages/index.html'; + if (($firsturl eq '') || + ($firsturl=~/^\/adm\/(logout|remote)/)) { + $firsturl='/adm/roles'; } - - success($r,$FORM{'uname'},$FORM{'udom'},$authhost,$firsturl); +# --------------------------------- 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'); + } + } + &success($r,$FORM{'uname'},$FORM{'udom'},$authhost,$firsturl); return OK; }