--- loncom/auth/lonacc.pm 1999/10/13 17:48:52 1.1.1.1 +++ loncom/auth/lonacc.pm 2004/12/14 20:32:15 1.53 @@ -1,12 +1,52 @@ # The LearningOnline Network # Cookie Based Access Handler -# 5/21/99,5/22,5/29,5/31,6/15 Gerd Kortemeyer +# +# $Id: lonacc.pm,v 1.53 2004/12/14 20:32:15 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, +# 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; use strict; -use Apache::Constants qw(:common); +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; @@ -19,25 +59,193 @@ sub handler { $handle=~s/\W//g; my $lonidsdir=$r->dir_config('lonIDsDir'); if ((-e "$lonidsdir/$handle.id") && ($handle ne '')) { - return OK; + +# ------------------------------------------------------ Initialize Environment + + &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle); + +# --------------------------------------------------------- Initialize Language + + &Apache::lonlocal::get_language_handle($r); + +# -------------------------------------------------------------- Resource State + + if ($requrl=~/^\/+(res|uploaded)\//) { + $ENV{'request.state'} = "published"; + } else { + $ENV{'request.state'} = 'unknown'; + } + $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|public|prtspool\//) { + my $access=&Apache::lonnet::allowed('bre',$requrl); + if ($access eq '1') { + $ENV{'user.error.msg'}="$requrl:bre:0:0:Choose Course"; + return HTTP_NOT_ACCEPTABLE; + } + if (($access ne '2') && ($access ne 'F')) { + $ENV{'user.error.msg'}="$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\//) || + ($requrl=~m|\.problem/smpedit$|) || + ($requrl=~/^\/public\/.*\/syllabus$/)) { +# ------------------------------------- This is serious stuff, get symb and log + my $query=$r->args; + my $symb; + if ($query) { + &Apache::loncommon::get_unprocessed_cgi($query,['symb']); + } + &Apache::lonnet::logthis("form.symb is ".$ENV{'form.symb'}); + if ($ENV{'form.symb'}) { + $symb=&Apache::lonnet::symbclean($ENV{'form.symb'}); + if ($requrl =~ m|^/adm/wrapper/|) { + my ($map,$mid,$murl)=&Apache::lonnet::decode_symb($symb); + &Apache::lonnet::symblist($map,$murl => $mid, + 'last_known' => $murl); + } elsif ((&Apache::lonnet::symbverify($symb,$requrl)) || + (($requrl=~m|(.*)/smpedit$|) && + &Apache::lonnet::symbverify($symb,$1))) { + my ($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) + $r->log_reason("Cookie $handle not valid", $r->filename) }; } - $cookie=CGI::Cookie->new(-name => 'lonURL', - -value => $requrl, - -path => '/'); - $r->err_headers_out->add('Set-Cookie' => $cookie); - return FORBIDDEN; + +# -------------------------------------------- See if this is a public resource + if ($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