--- loncom/auth/lonacc.pm 1999/10/13 17:48:52 1.1.1.1 +++ loncom/auth/lonacc.pm 2006/07/07 22:01:52 1.84 @@ -1,12 +1,307 @@ # The LearningOnline Network # Cookie Based Access Handler -# 5/21/99,5/22,5/29,5/31,6/15 Gerd Kortemeyer +# +# $Id: lonacc.pm,v 1.84 2006/07/07 22:01:52 raeburn 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::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 cleanup { + my ($r)=@_; + if (! $r->is_initial_req()) { return DECLINED; } + &Apache::lonnet::save_cache(); + return OK; +} + +sub goodbye { + my ($r)=@_; + &Apache::lonnet::goodbye(); + return DONE; +} + +############################################### + +sub get_posted_cgi { + my ($r) = @_; + + my $buffer; + if ($r->header_in('Content-length')) { + $r->read($buffer,$r->header_in('Content-length'),0); + } + unless ($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($1))/eg; + &Apache::loncommon::add_to_env("form.$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; + } + &Apache::loncommon::add_to_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"; + } + } + } +# +# Digested POSTed values +# +# Remember the way this was originally done (GET or POST) +# + $env{'request.method'}=$ENV{'REQUEST_METHOD'}; +# +# There may also be stuff in the query string +# Tell subsequent handlers that this was GET, not POST, so they can access query string. +# Also, unset POSTed content length to cover all tracks. +# + + $r->method_number(M_GET); + + $r->method('GET'); + $r->headers_in->unset('Content-length'); +} + +sub portfolio_access { + my ($udom,$unum,$file_name,$group) = @_; + my $current_perms = &Apache::lonnet::get_portfile_permissions($udom,$unum); + my %access_controls = &Apache::lonnet::get_access_controls( + $current_perms,$group,$file_name); + my ($public,$guest,@domains,@users,@courses,@groups); + my $now = time; + my $access_hash = $access_controls{$file_name}; + if (ref($access_hash) eq 'HASH') { + foreach my $key (keys(%{$access_hash})) { + my ($num,$scope,$end,$start) = ($key =~ /^([^:]+):([a-z]+)_(\d*)_?(\d*)$/); + if ($start > $now) { + next; + } + if ($end && $end<$now) { + next; + } + if ($scope eq 'public') { + $public = $key; + last; + } elsif ($scope eq 'guest') { + $guest = $key; + } elsif ($scope eq 'domains') { + push(@domains,$key); + } elsif ($scope eq 'users') { + push(@users,$key); + } elsif ($scope eq 'course') { + push(@courses,$key); + } elsif ($scope eq 'group') { + push(@groups,$key); + } + } + if ($public) { + return 'ok'; + } + if ($env{'user.name'} eq 'public' && $env{'user.domain'} eq 'public') { + if ($guest) { + return 'guest:'.$guest; + } + } else { + if (@domains > 0) { + foreach my $domkey (@domains) { + my %content = &Apache::lonnet::parse_access_controls($$access_hash{$domkey}); + if (ref($content{'dom'}) eq 'ARRAY') { + if (grep(/^\Q$env{'user.domain'}\E$/,@{$content{'dom'}})) { + return 'ok'; + } + } + } + } + if (@users > 0) { + foreach my $userkey (@users) { + my %content = &Apache::lonnet::parse_access_controls($$access_hash{$userkey}); + if (exists($content{'users'}{$env{'user.name'}.':'.$env{'user.domain'}})) { + return 'ok'; + } + } + } + my %roleshash; + my @courses_and_groups = @courses; + push(@courses_and_groups,@groups); + if (@courses_and_groups > 0) { + my (%allgroups,%allroles); + my ($start,$end,$role,$sec,$group); + foreach my $envkey (%env) { + if ($envkey =~ m-^user\.role\.(gr|cc|in|ta|ep|st)\./([^/]+)/([^/]+)/?([^/]*)$-) { + my $cid = $2.'_'.$3; + if ($1 eq 'gr') { + $group = $4; + $allgroups{$cid}{$group} = $env{$envkey}; + } else { + if ($4 eq '') { + $sec = 'none'; + } else { + $sec = $4; + } + $allroles{$cid}{$1}{$sec} = $env{$envkey}; + } + } elsif ($envkey =~ m-^user\.role\./cr/(\w+/\w+/\w*)./([^/]+)/([^/]+)/?([^/]*)$-) { + my $cid = $2.'_'.$3; + if ($4 eq '') { + $sec = 'none'; + } else { + $sec = $4; + } + $allroles{$cid}{$1}{$sec} = $env{$envkey}; + } + } + if (keys(%allroles) == 0) { + return; + } + foreach my $key (@courses_and_groups) { + my %content = &Apache::lonnet::parse_access_controls($$access_hash{$key}); + my $cnum = $content{'number'}; + my $cdom = $content{'domain'}; + my $cid = $cdom.'_'.$cnum; + if (!exists($allroles{$cid})) { + next; + } + foreach my $role_id (keys(%{$content{'roles'}})) { + my @sections = @{$content{'roles'}{$role_id}{'section'}}; + my @groups = @{$content{'roles'}{$role_id}{'group'}}; + my @status = @{$content{'roles'}{$role_id}{'access'}}; + my @roles = @{$content{'roles'}{$role_id}{'role'}}; + foreach my $role (keys(%{$allroles{$cid}})) { + if ((grep/^all$/,@roles) || (grep/^\Q$role\E$/,@roles)) { + foreach my $sec (keys(%{$allroles{$cid}{$role}})) { + if (&course_group_datechecker($allroles{$cid}{$role}{$sec},$now,\@status) eq 'ok') { + if (grep/^all$/,@sections) { + return 'ok'; + } else { + if (grep/^$sec$/,@sections) { + return 'ok' + } + } + } + } + if (keys(%{$allgroups{$cid}}) == 0) { + if (grep/^none$/,@groups) { + return 'ok'; + } + } else { + if (grep/^all$/,@groups) { + return 'ok'; + } + foreach my $group (keys(%{$allgroups{$cid}})) { + if (grep/^$group$/,@groups) { + return 'ok'; + } + } + } + } + } + } + } + } + if ($guest) { + return 'guest:'.$guest; + } + } + } + return; +} + +sub course_group_datechecker { + my ($dates,$now,$status) = @_; + my ($start,$end) = split(/\./,$dates); + if (!$start && !$end) { + return 'ok'; + } + if (grep/^active$/,@{$status}) { + if (((!$start) || ($start && $start <= $now)) && ((!$end) || ($end && $end >= $now))) { + return 'ok'; + } + } + if (grep/^previous$/,@{$status}) { + if ($end > $now ) { + return 'ok'; + } + } + if (grep/^future$/,@{$status}) { + if ($start > $now) { + return 'ok'; + } + } + return; +} sub handler { my $r = shift; @@ -14,30 +309,285 @@ sub handler { my %cookies=CGI::Cookie->parse($r->header_in('Cookie')); my $lonid=$cookies{'lonID'}; my $cookie; + my $lonidsdir=$r->dir_config('lonIDsDir'); + + my $handle; if ($lonid) { - my $handle=$lonid->value; + $handle=$lonid->value; $handle=~s/\W//g; - my $lonidsdir=$r->dir_config('lonIDsDir'); + } + + my ($sso_login); + if ($r->user + && (!$lonid || !-e "$lonidsdir/$handle.id" || $handle eq '') ) { + $sso_login = 1; + my $domain = $r->dir_config('lonDefDomain'); + my $home=&Apache::lonnet::homeserver($r->user,$domain); + if ($home !~ /(con_lost|no_such_host)/) { + $handle=&Apache::lonauth::success($r,$r->user,$domain, + $home,'noredirect'); + $r->header_out('Set-cookie',"lonID=$handle; path=/"); + } + } + + if ($sso_login) { + &Apache::lonnet::appenv('request.sso.login' => 1); + } + + if ($r->dir_config("lonBalancer") eq 'yes') { + $r->set_handlers('PerlResponseHandler'=> + [\&Apache::switchserver::handler]); + } + + if ($handle ne '') { 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::lonacc::get_posted_cgi($r); + +# ---------------------------------------------------------------- Check access + my $now = time; + if ($requrl =~ m|/+uploaded/([^/]+)/([^/]+)/portfolio(/.+)$|) { + my $result = &portfolio_access($1,$2,$3); + if ($result eq 'ok') { + return OK; + } elsif ($result =~ /^guest:(\w+)$/) { + my $guestkey = $1; + #FIXME need to cause generation of an intermediate page + } + } elsif ($requrl =~ m|/+uploaded/([^/]+)/([^/]+)/groups/([^/]+)/portfolio/(.+)$|) { + my $result = &portfolio_access($1,$2,$3.'/'.$4,$3); + if ($result eq 'ok') { + return OK; + } elsif ($result =~ /^guest:(\w+)$/) { + my $guestkey = $1; + #FIXME need to cause generation of an intermediate page +} + } + if ($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; + } + } + if ($env{'user.name'} eq 'public' && + $env{'user.domain'} eq 'public' && + $requrl !~ m{^/+(res|public)/} && + $requrl !~ m{^/+adm/(help|logout|randomlabel\.png)}) { + $env{'request.querystring'}=$r->args; + $env{'request.firsturl'}=$requrl; + return FORBIDDEN; + } +# ------------------------------------------------------------- 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\//) || + ($requrl=~m|^/adm/coursedocs/showdoc/|) || + ($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($query,['symb']); + } + if ($env{'form.symb'}) { + $symb=&Apache::lonnet::symbclean($env{'form.symb'}); + if ($requrl =~ m|^/adm/wrapper/| + || $requrl =~ m|^/adm/coursedocs/showdoc/|) { + my ($map,$mid,$murl)=&Apache::lonnet::decode_symb($symb); + &Apache::lonnet::symblist($map,$murl => [$murl,$mid], + 'last_known' =>[$murl,$mid]); + } elsif ((&Apache::lonnet::symbverify($symb,$requrl)) || + (($requrl=~m|(.*)/smpedit$|) && + &Apache::lonnet::symbverify($symb,$1))) { + my ($map,$mid,$murl)=&Apache::lonnet::decode_symb($symb); + &Apache::lonnet::symblist($map,$murl => [$murl,$mid], + 'last_known' =>[$murl,$mid]); + } 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); + if (&Apache::lonnet::is_on_map($requrl) && $symb && + !&Apache::lonnet::symbverify($symb,$requrl)) { + $r->log_reason('Invalid symb for '.$requrl.': '.$symb); + $env{'user.error.msg'}= + "$requrl:bre:1:1:Invalid Access"; + return HTTP_NOT_ACCEPTABLE; + } + if ($symb) { + my ($map,$mid,$murl)= + &Apache::lonnet::decode_symb($symb); + &Apache::lonnet::symblist($map,$murl =>[$murl,$mid], + 'last_known' =>[$murl,$mid]); + } + } + $env{'request.symb'}=$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", $r->filename); + } + } + +# -------------------------------------------- See if this is a public resource + if ($requrl=~m|^/public/| + || (&Apache::lonnet::metadata($requrl,'copyright') eq 'public')) { + &Apache::lonnet::logthis('Granting public access: '.$requrl); + &Apache::lonlocal::get_language_handle($r); + my $cookie= + &Apache::lonauth::success($r,'public','public','public'); + my $lonidsdir=$r->dir_config('lonIDsDir'); + &Apache::lonnet::transfer_profile_to_env($lonidsdir,$cookie); + &Apache::lonacc::get_posted_cgi($r); + $env{'request.state'} = "published"; + $env{'request.publicaccess'} = 1; + $env{'request.filename'} = $r->filename; + + $r->header_out('Set-cookie',"lonID=$cookie; path=/"); + return OK; + } + if ($requrl=~m|^/+adm/+help/+|) { + return OK; } - $cookie=CGI::Cookie->new(-name => 'lonURL', - -value => $requrl, - -path => '/'); - $r->err_headers_out->add('Set-Cookie' => $cookie); - return FORBIDDEN; +# ------------------------------------- See if this is a viewable portfolio file + if ($requrl =~ m|/+uploaded/([^/]+)/([^/]+)/portfolio(/.+)$|) { + my $result = &portfolio_access($1,$2,$3); + if ($result eq 'ok') { + return OK; + } elsif ($result =~ /^guest:(\w+)$/) { + my $guestkey = $1; + #FIXME need to cause generation of an intermediate page + } + } elsif ($requrl =~ m|/+uploaded/([^/]+)/([^/]+)/groups/([^/]+)/portfolio/(.+)$|) { + my $result = &portfolio_access($1,$2,$3.'/'.$4,$3); + if ($result eq 'ok') { + return OK; + } elsif ($result =~ /^guest:(\w+)$/) { + my $guestkey = $1; + #FIXME need to cause generation of an intermediate page + } + } +# -------------------------------------------------------------- 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