--- loncom/auth/loncacc.pm 2000/12/25 12:44:43 1.12 +++ loncom/auth/loncacc.pm 2005/07/12 07:00:28 1.40 @@ -1,19 +1,71 @@ # 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, -# 01/06,01/11,6/1,9/25,9/28,11/22,12/25 Gerd Kortemeyer +# +# $Id: loncacc.pm,v 1.40 2005/07/12 07:00:28 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 :methods); +use Apache::Constants qw(:common :http :methods REDIRECT); use Apache::File; use CGI::Cookie(); +use Fcntl qw(:flock); +use Apache::lonlocal; +use Apache::lonnet; + + +sub constructaccess { + my ($url,$ownerdomain)=@_; + my ($ownername)=($url=~/\/(?:\~|priv\/|home\/)(\w+)\//); + 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; @@ -22,97 +74,28 @@ sub handler { $handle=~s/\W//g; my $lonidsdir=$r->dir_config('lonIDsDir'); if ((-e "$lonidsdir/$handle.id") && ($handle ne '')) { - my $ownername=$requrl; - $ownername=~s/\/(?:\~|priv\/)(\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); - 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]); - $ENV{$envname} = $envvalue; - } - $ENV{'user.environment'} = "$lonidsdir/$handle.id"; - $ENV{'request.state'} = "construct"; - $ENV{'request.filename'} = $r->filename; -# -------------------------------------------------------- Load POST parameters +# ------------------------------------------------------ Initialize Environment + + &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle); +# --------------------------------------------------------- Initialize Language + + &Apache::lonlocal::get_language_handle($r); - my $buffer; +# -------------------------------------------------------------- Resource State - $r->read($buffer,$r->header_in('Content-length')); + $env{'request.state'} = "construct"; + $env{'request.filename'} = $r->filename; - unless ($buffer=~/^(\-+\w+)\s+Content\-Disposition\:\s*form\-data/si) { - my @pairs=split(/&/,$buffer); - my $pair; - foreach $pair (@pairs) { - my ($name,$value) = split(/=/,$pair); - $value =~ tr/+/ /; - $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg; - $name =~ tr/+/ /; - $name =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg; - $ENV{"form.$name"}=$value; - } - } else { - my $contentsep=$1; - my @lines = split (/\n/,$buffer); - my $name=''; - my $value=''; - my $fname=''; - my $fmime=''; - my $i; - for ($i=0;$i<=$#lines;$i++) { - if ($lines[$i]=~/^$contentsep/) { - if ($name) { - chomp($value); - $ENV{"form.$name"}=$value; - if ($fname) { - $ENV{"form.$name.filename"}=$fname; - $ENV{"form.$name.mimetype"}=$fmime; - } - } - if ($i<$#lines) { - $i++; - $lines[$i]=~ - /Content\-Disposition\:\s*form\-data\;\s*name\=\"([^\"]+)\"/i; - $name=$1; - $value=''; - if ($lines[$i]=~/filename\=\"([^\"]+)\"/i) { - $fname=$1; - if - ($lines[$i+1]=~/Content\-Type\:\s*([\w\-\/]+)/i) { - $fmime=$1; - $i++; - } else { - $fmime=''; - } - } else { - $fname=''; - $fmime=''; - } - $i++; - } - } else { - $value.=$lines[$i]."\n"; - } + unless (&constructaccess($requrl,$r->dir_config('lonDefDomain'))) { + $r->log_reason("Unauthorized $requrl", $r->filename); + return HTTP_NOT_ACCEPTABLE; } - } - $r->method_number(M_GET); - $r->method('GET'); - $r->headers_in->unset('Content-length'); + +# -------------------------------------------------------- Load POST parameters + + &Apache::loncommon::get_posted_cgi($r); return OK; } else { @@ -122,13 +105,68 @@ 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