--- loncom/auth/lonacc.pm 2000/12/26 19:50:25 1.15 +++ loncom/auth/lonacc.pm 2002/11/06 22:43:27 1.37 @@ -1,8 +1,42 @@ # The LearningOnline Network # Cookie Based Access Handler +# +# $Id: lonacc.pm,v 1.37 2002/11/06 22:43:27 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 +# 12/15 Scott Harrison +# YEAR=2002 +# 1/4,2/25 Gerd Kortemeyer +# +### package Apache::lonacc; @@ -10,7 +44,9 @@ use strict; use Apache::Constants qw(:common :http :methods); use Apache::File; use Apache::lonnet; +use Apache::loncommon(); use CGI::Cookie(); +use Fcntl qw(:flock); sub handler { my $r = shift; @@ -29,7 +65,9 @@ sub handler { 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++) { @@ -38,17 +76,12 @@ sub handler { $ENV{$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; + if ($requrl=~/^\/res\//) { + $ENV{'request.state'} = "published"; } else { - $ENV{'HTTP_REFERER'}=$ENV{'httpref.'.$requrl}; - } + $ENV{'request.state'} = 'unknown'; + } + $ENV{'request.filename'} = $r->filename; # -------------------------------------------------------- Load POST parameters @@ -57,7 +90,6 @@ sub handler { 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; @@ -67,7 +99,7 @@ sub handler { $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"}=$value; + &Apache::loncommon::add_to_env("form.$name",$value); } } else { my $contentsep=$1; @@ -87,7 +119,7 @@ sub handler { } else { $value=~s/\s+$//s; } - $ENV{"form.$name"}=$value; + &Apache::loncommon::add_to_env("form.$name",$value); } if ($i<$#lines) { $i++; @@ -115,13 +147,14 @@ sub handler { } } } + $ENV{'request.method'}=$ENV{'REQUEST_METHOD'}; $r->method_number(M_GET); $r->method('GET'); $r->headers_in->unset('Content-length'); # ---------------------------------------------------------------- Check access - if ($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 +164,141 @@ 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') { +# ------------------------------------- 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,$murl)=split(/\_\_\_/,$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; + } + $ENV{'request.symb'}=$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); + $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)/) || + ($requrl=~m|^/prtspool/|)) { +# -------------------------- Store where they wanted to go and get login screen + $ENV{'request.firsturl'}=$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