--- loncom/auth/loncacc.pm 2000/06/05 20:28:17 1.6 +++ loncom/auth/loncacc.pm 2007/02/01 07:13:59 1.45 @@ -1,61 +1,101 @@ # The LearningOnline Network # Cookie Based Access Handler for Construction Area # (lonacc: 5/21/99,5/22,5/29,5/31 Gerd Kortemeyer) -# 6/15,16/11,22/11, -# 01/06,01/11,6/1 Gerd Kortemeyer +# +# $Id: loncacc.pm,v 1.45 2007/02/01 07:13:59 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::loncacc; use strict; -use Apache::Constants qw(:common :http); +use Apache::Constants qw(:common :http :methods REDIRECT); use CGI::Cookie(); +use Fcntl qw(:flock); +use Apache::lonlocal; +use Apache::lonnet; +use Apache::lonacc; +use LONCAPA qw(:DEFAULT :match); + +sub constructaccess { + my ($url,$ownerdomain)=@_; + my ($ownername)=($url=~/\/(?:\~|priv\/|home\/)($match_username)\//); + unless (($ownername) && ($ownerdomain)) { return ''; } + # We do not allow editing of previous versions of files. + if ($url=~/\.(\d+)\.(\w+)$/) { return ''; } + my @possibledomains = &Apache::lonnet::current_machine_domains(); + if ($ownername eq $env{'user.name'}) { + foreach my $domain (@possibledomains) { + if ($domain eq $env{'user.domain'}) { + return ($ownername,$domain); + } + } + } + + foreach my $domain (@possibledomains) { + if (exists($env{'user.priv.ca./'.$domain.'/'.$ownername.'./'}) || + exists($env{'user.priv.aa./'.$domain.'/'.$ownername.'./'}) ) { + return ($ownername,$domain); + } + } + return ''; +} sub handler { my $r = shift; my $requrl=$r->uri; + $env{'request.editurl'}=$requrl; 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 $handle=&LONCAPA::clean_handle($lonid->value); my $lonidsdir=$r->dir_config('lonIDsDir'); if ((-e "$lonidsdir/$handle.id") && ($handle ne '')) { - my $ownername=$requrl; - $ownername=~s/\/\~(\w+).*/\1/; - my $ownerdomain=$r->dir_config('lonDefDomain'); - my @handleparts=split(/\_/,$handle); - my $username=$handleparts[0]; - my $domain=$handleparts[2]; - if (($username ne $ownername) || ($domain ne $ownerdomain)) { - $r->log_reason - ("$username at $domain not authorized", $r->filename); + +# ------------------------------------------------------ Initialize Environment + + &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle); + +# --------------------------------------------------------- Initialize Language + + &Apache::lonlocal::get_language_handle($r); + +# -------------------------------------------------------------- Resource State + + $env{'request.state'} = "construct"; + $env{'request.filename'} = $r->filename; + + unless (&constructaccess($requrl,$r->dir_config('lonDefDomain'))) { + $r->log_reason("Unauthorized $requrl", $r->filename); return HTTP_NOT_ACCEPTABLE; } - my @profile; - { - my $idf=Apache::File->new("$lonidsdir/$handle.id"); - @profile=<$idf>; - } - my $envi; - for ($envi=0;$envi<=$#profile;$envi++) { - chomp($profile[$envi]); - my ($envname,$envvalue)=split(/=/,$profile[$envi]); - $r->subprocess_env("$envname" => "$envvalue"); - } - $r->subprocess_env("user.environment" => "$lonidsdir/$handle.id", - "request.state" => "construct", - "request.filename" => $r->filename); - my $buffer; - $r->read($buffer,$r->header_in('Content-length')); - my @pairs=split(/&/,$buffer); - my $pair; my $name; my $value; - foreach $pair (@pairs) { - ($name,$value) = split(/=/,$pair); - $value =~ tr/+/ /; - $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg; - $r->subprocess_env("form.$name" => $value); - } + +# -------------------------------------------------------- Load POST parameters + + &Apache::lonacc::get_posted_cgi($r); + return OK; } else { $r->log_reason("Cookie $handle not valid", $r->filename) @@ -64,13 +104,68 @@ sub handler { # ----------------------------------------------- Store where they wanted to go - $ENV{'request.firsturl'}=$requrl; + $env{'request.firsturl'}=$requrl; return FORBIDDEN; } 1; __END__ +=head1 NAME + +Apache::lonacc - Cookie Based Access Handler for Construction Area + +=head1 SYNOPSIS + +Invoked (for various locations) by /etc/httpd/conf/loncapa_apache.conf: + + PerlAccessHandler Apache::loncacc + +=head1 INTRODUCTION + +This module enables cookie based authentication for construction area +and is used to control access for three (essentially equivalent) URIs. + + + + + +Whenever the client sends the cookie back to the server, +if the cookie is missing or invalid, the user is re-challenged +for login information. + +This is part of the LearningOnline Network with CAPA project +described at http://www.lon-capa.org. + +=head1 HANDLER SUBROUTINE + +This routine is called by Apache and mod_perl. + +=over 4 + +=item * + +load POST parameters + +=item * + +store where they wanted to go (first url entered) + +=back + +=head1 OTHERSUBROUTINES + +=over 4 + +=item * + +constructaccess($url,$ownerdomain) : See if the owner domain and name +in the URL match those in the expected environment. If so, return +two element list ($ownername,$ownerdomain). Else, return null string. + +=back + +=cut