--- loncom/auth/lonacc.pm 2000/12/26 19:50:25 1.15 +++ loncom/auth/lonacc.pm 2003/11/21 21:27:25 1.50 @@ -1,8 +1,41 @@ # The LearningOnline Network # Cookie Based Access Handler +# +# $Id: lonacc.pm,v 1.50 2003/11/21 21:27:25 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/ +# +# YEAR=1999 # 5/21/99,5/22,5/29,5/31,6/15,16/11,22/11, +# YEAR=2000 # 01/06,01/13,05/31,06/01,09/06,09/25,09/28,10/30,11/6, -# 12/25,12/26 Gerd Kortemeyer +# 12/25,12/26, +# YEAR=2001 +# 01/06/01,05/28,8/11,9/26,11/29 Gerd Kortemeyer +# YEAR=2002 +# 1/4,2/25 Gerd Kortemeyer +# +### package Apache::lonacc; @@ -10,7 +43,10 @@ use strict; use Apache::Constants qw(:common :http :methods); use Apache::File; use Apache::lonnet; +use Apache::loncommon(); +use Apache::lonlocal; use CGI::Cookie(); +use Fcntl qw(:flock); sub handler { my $r = shift; @@ -24,104 +60,30 @@ sub handler { my $lonidsdir=$r->dir_config('lonIDsDir'); if ((-e "$lonidsdir/$handle.id") && ($handle ne '')) { -# ------------------------------------------- Transfer profile into environment +# ------------------------------------------------------ Initialize Environment - 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'} = "published"; - $ENV{'request.filename'} = $r->filename; - -# --------------------- Figure out referer, first from HTTP_REFERER, then cache - - my $referer=''; - if ($referer=$r->header_in('Referer')) { - $ENV{'HTTP_REFERER'}=$referer; - } else { - $ENV{'HTTP_REFERER'}=$ENV{'httpref.'.$requrl}; - } - -# -------------------------------------------------------- Load POST parameters + &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle); +# --------------------------------------------------------- Initialize Language - - my $buffer; + &Apache::lonlocal::get_language_handle($r); - $r->read($buffer,$r->header_in('Content-length')); +# -------------------------------------------------------------- Resource State - unless ($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[$i]."\n"; - } + if ($requrl=~/^\/res\//) { + $ENV{'request.state'} = "published"; + } else { + $ENV{'request.state'} = 'unknown'; } - } - $r->method_number(M_GET); - $r->method('GET'); - $r->headers_in->unset('Content-length'); + $ENV{'request.filename'} = $r->filename; + $ENV{'request.noversionuri'} = &Apache::lonnet::deversion($requrl); +# -------------------------------------------------------- Load POST parameters + + &Apache::loncommon::get_posted_cgi($r); # ---------------------------------------------------------------- Check access - if ($requrl!~/^\/adm\//) { + if ($requrl!~/^\/adm|public|prtspool\//) { my $access=&Apache::lonnet::allowed('bre',$requrl); if ($access eq '1') { $ENV{'user.error.msg'}="$requrl:bre:0:0:Choose Course"; @@ -131,18 +93,151 @@ sub handler { $ENV{'user.error.msg'}="$requrl:bre:1:1:Access Denied"; return HTTP_NOT_ACCEPTABLE; } - } + } + if ($requrl =~ m|^/prtspool/|) { + my $start='/prtspool/'.$ENV{'user.name'}.'_'. + $ENV{'user.domain'}; + if ($requrl !~ /^\Q$start\E/) { + $ENV{'user.error.msg'}="$requrl:bre:1:1:Access Denied"; + return HTTP_NOT_ACCEPTABLE; + } + } +# ------------------------------------------------------------- This is allowed + if ($ENV{'request.course.id'}) { + &Apache::lonnet::countacc($requrl); + $requrl=~/\.(\w+)$/; + if ((&Apache::loncommon::fileembstyle($1) eq 'ssi') || + ($requrl=~/^\/adm\/.*\/(aboutme|navmaps|smppg|bulletinboard)(\?|$)/) || + ($requrl=~/^\/adm\/wrapper\//) || + ($requrl=~/^\/public\/.*\/syllabus$/)) { +# ------------------------------------- This is serious stuff, get symb and log + my $query=$r->args; + my $symb; + if ($query) { + &Apache::loncommon::get_unprocessed_cgi($query,['symb']); + } + if ($ENV{'form.symb'}) { + $symb=&Apache::lonnet::symbclean($ENV{'form.symb'}); + if (&Apache::lonnet::symbverify($symb,$requrl)) { + my ($map,$mid,$murl)=&Apache::lonnet::decode_symb($symb); + &Apache::lonnet::symblist($map,$murl => $mid, + 'last_known' => $murl); + } else { + $r->log_reason('Invalid symb for '.$requrl.': '. + $symb); + $ENV{'user.error.msg'}= + "$requrl:bre:1:1:Invalid Access"; + return HTTP_NOT_ACCEPTABLE; + } + } else { + $symb=&Apache::lonnet::symbread($requrl); + my ($map,$mid,$murl)=split(/\_\_\_/,$symb); + &Apache::lonnet::symblist($map,$murl => $mid, + 'last_known' => $murl); + } + $ENV{'request.symb'}=$symb; + &Apache::lonnet::courseacclog($symb); + } else { +# ------------------------------------------------------- This is other content + &Apache::lonnet::courseacclog($requrl); + } + } return OK; } else { $r->log_reason("Cookie $handle not valid", $r->filename) }; } -# ----------------------------------------------- Store where they wanted to go - - $ENV{'request.firsturl'}=$requrl; - return FORBIDDEN; +# -------------------------------------------- See if this is a public resource + if ($requrl=~m|^/public/| + || (&Apache::lonnet::metadata($requrl,'copyright') eq 'public')) { + &Apache::lonnet::logthis('Granting public access: '.$requrl); + my $buffer; + $r->read($buffer,$r->header_in('Content-length'),0); + &Apache::loncommon::get_unprocessed_cgi($buffer); + $ENV{'user.name'}='public'; + $ENV{'user.domain'}='public'; + $ENV{'request.state'} = "published"; + $ENV{'request.publicaccess'} = 1; + $ENV{'request.filename'} = $r->filename; + return OK; + } +# -------------------------------------------------------------- Not authorized + $requrl=~/\.(\w+)$/; + if ((&Apache::loncommon::fileembstyle($1) eq 'ssi') || + ($requrl=~/^\/adm\/(roles|logout|email|menu|remote)/) || + ($requrl=~m|^/prtspool/|)) { +# -------------------------- Store where they wanted to go and get login screen + $ENV{'request.querystring'}=$r->args; + $ENV{'request.firsturl'}=$requrl; + return FORBIDDEN; + } else { +# --------------------------------------------------------------------- Goodbye + return HTTP_BAD_REQUEST; + } } 1; __END__ + +=head1 NAME + +Apache::lonacc - Cookie Based Access Handler + +=head1 SYNOPSIS + +Invoked (for various locations) by /etc/httpd/conf/srm.conf: + + PerlAccessHandler Apache::lonacc + +=head1 INTRODUCTION + +This module enables cookie based authentication and is used +to control access for many different LON-CAPA URIs. + +Whenever the client sends the cookie back to the server, +this cookie is handled by either lonacc.pm or loncacc.pm +(see srm.conf for what is invoked when). 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 * + +transfer profile into environment + +=item * + +load POST parameters + +=item * + +check access + +=item * + +if allowed, get symb, log, generate course statistics if applicable + +=item * + +otherwise return error + +=item * + +see if public resource + +=item * + +store attempted access + +=back + +=cut