--- loncom/auth/loncacc.pm 2002/01/04 15:10:54 1.20 +++ loncom/auth/loncacc.pm 2013/06/04 23:12:13 1.61 @@ -1,8 +1,8 @@ # The LearningOnline Network -# Cookie Based Access Handler for Construction Area +# Cookie Based Access Handler for Authoring Spaces # (lonacc: 5/21/99,5/22,5/29,5/31 Gerd Kortemeyer) # -# $Id: loncacc.pm,v 1.20 2002/01/04 15:10:54 www Exp $ +# $Id: loncacc.pm,v 1.61 2013/06/04 23:12:13 raeburn Exp $ # # Copyright Michigan State University Board of Trustees # @@ -26,181 +26,27 @@ # # http://www.lon-capa.org/ # -# YEAR=2000 -# 6/15,16/11,22/11, -# YEAR=2001 -# 01/06,01/11,6/1,9/25,9/28,11/22,12/25,12/26, -# 01/06/01,05/04,05/05,05/09 Gerd Kortemeyer -# 12/21 Scott Harrison -# YEAR=2002 -# 1/4 Gerd Kortemeyer -### -package Apache::loncacc; - -use strict; -use Apache::Constants qw(:common :http :methods); -use Apache::File; -use CGI::Cookie(); -use Fcntl qw(:flock); - -sub constructaccess { - my ($url,$ownerdomain)=@_; - my ($ownername)=($url=~/\/(?:\~|priv\/|home\/)(\w+)/); - unless (($ownername) && ($ownerdomain)) { return ''; } - - if (($ownername eq $ENV{'user.name'}) && - ($ownerdomain eq $ENV{'user.domain'})) { - return ($ownername,$ownerdomain); - } - - my $capriv='user.priv.ca./'. - $ownerdomain.'/'.$ownername.'./'. - $ownerdomain.'/'.$ownername; - foreach (keys %ENV) { - if ($_ eq $capriv) { - return ($ownername,$ownerdomain); - } - } - - return ''; -} - -sub handler { - my $r = shift; - my $requrl=$r->uri; - 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 '')) { - my @profile; - { - my $idf=Apache::File->new("$lonidsdir/$handle.id"); - flock($idf,LOCK_SH); - @profile=<$idf>; - $idf->close(); - } - 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'} = $r->filename; - - unless (&constructaccess($requrl,$r->dir_config('lonDefDomain'))) { - $r->log_reason("Unauthorized $requrl", $r->filename); - return HTTP_NOT_ACCEPTABLE; - } - -# -------------------------------------------------------- Load POST parameters - - - my $buffer; - - $r->read($buffer,$r->header_in('Content-length')); - - unless ($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); - if ($fname) { - $ENV{"form.$name.filename"}=$fname; - $ENV{"form.$name.mimetype"}=$fmime; - } else { - $value=~s/\s+$//s; - } - $ENV{"form.$name"}=$value; - } - if ($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"; - } - } - } - $ENV{'request.method'}=$ENV{'REQUEST_METHOD'}; - $r->method_number(M_GET); - $r->method('GET'); - $r->headers_in->unset('Content-length'); - - return OK; - } else { - $r->log_reason("Cookie $handle not valid", $r->filename) - }; - } - -# ----------------------------------------------- Store where they wanted to go - - $ENV{'request.firsturl'}=$requrl; - return FORBIDDEN; -} - -1; -__END__ +=pod =head1 NAME -Apache::lonacc - Cookie Based Access Handler for Construction Area +Apache::lonacc - Cookie Based Access Handler for Authoring Spaces =head1 SYNOPSIS -Invoked (for various locations) by /etc/httpd/conf/srm.conf: +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. +and is used to control access for the following two types of URI +(one for files, and one for directories): - - + Whenever the client sends the cookie back to the server, if the cookie is missing or invalid, the user is re-challenged @@ -225,23 +71,72 @@ store where they wanted to go (first url =back -=head1 OTHERSUBROUTINES +=cut -=over 4 -=item * +package Apache::loncacc; -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. +use strict; +use Apache::Constants qw(:common :http :methods REDIRECT); +use Fcntl qw(:flock); +use Apache::lonlocal; +use Apache::lonnet; +use Apache::lonacc; +use LONCAPA qw(:DEFAULT :match); -=back +sub handler { + my $r = shift; + my $requrl=$r->uri; + $env{'request.editurl'}=$requrl; -=cut + my $handle = &Apache::lonnet::check_for_valid_session($r); + if ($handle ne '') { +# ------------------------------------------------------ Initialize Environment + my $lonidsdir=$r->dir_config('lonIDsDir'); + &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; + + my $allowed; + my ($ownername,$ownerdom,$ownerhome) = + &Apache::lonnet::constructaccess($requrl,'setpriv'); + if (($ownername ne '') && ($ownerdom ne '') && ($ownerhome ne '')) { + unless ($ownerhome eq 'no_host') { + my @hosts = &Apache::lonnet::current_machine_ids(); + if (grep(/^\Q$ownerhome\E$/,@hosts)) { + $allowed = 1; + } + } + } + unless ($allowed) { + $r->log_reason("Unauthorized $requrl", $r->filename); + return HTTP_NOT_ACCEPTABLE; + } +# -------------------------------------------------------- Load POST parameters + &Apache::lonacc::get_posted_cgi($r); + return OK; + } else { + $r->log_reason("Cookie $handle not valid", $r->filename) + } +# ----------------------------------------------- Store where they wanted to go + + $env{'request.firsturl'}=$requrl; + return FORBIDDEN; +} + +1; +__END__