--- loncom/auth/lonacc.pm 2006/09/05 17:33:06 1.96 +++ loncom/auth/lonacc.pm 2010/03/19 22:22:34 1.130.4.1 @@ -1,7 +1,7 @@ # The LearningOnline Network # Cookie Based Access Handler # -# $Id: lonacc.pm,v 1.96 2006/09/05 17:33:06 albertel Exp $ +# $Id: lonacc.pm,v 1.130.4.1 2010/03/19 22:22:34 raeburn Exp $ # # Copyright Michigan State University Board of Trustees # @@ -27,6 +27,73 @@ # ### +=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 + +=head1 NOTABLE SUBROUTINES + +=over + +=cut + + package Apache::lonacc; use strict; @@ -36,7 +103,7 @@ use Apache::lonnet; use Apache::loncommon(); use Apache::lonlocal; use Apache::restrictedaccess(); -use CGI::Cookie(); +use Apache::blockedaccess(); use Fcntl qw(:flock); use LONCAPA; @@ -57,13 +124,14 @@ sub goodbye { ############################################### sub get_posted_cgi { - my ($r) = @_; + my ($r,$fields) = @_; 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 $content_type = $r->header_in('Content-type'); + if ($content_type !~ m{^multipart/form-data}) { my @pairs=split(/&/,$buffer); my $pair; foreach $pair (@pairs) { @@ -72,10 +140,13 @@ sub get_posted_cgi { $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($1))/eg; + if (ref($fields) eq 'ARRAY') { + next if (!grep(/^\Q$name\E$/,@{$fields})); + } &Apache::loncommon::add_to_env("form.$name",$value); } } else { - my $contentsep=$1; + my ($contentsep) = ($content_type =~ /boundary=\"?([^\";,]+)\"?/); my @lines = split (/\n/,$buffer); my $name=''; my $value=''; @@ -83,16 +154,29 @@ sub get_posted_cgi { my $fmime=''; my $i; for ($i=0;$i<=$#lines;$i++) { - if ($lines[$i]=~/^$contentsep/) { + if ($lines[$i]=~/^--\Q$contentsep\E/) { if ($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 (ref($fields) eq 'ARRAY') { + next if (!grep(/^\Q$name\E$/,@{$fields})); + } + if ($fname) { + if ($env{'form.symb'} ne '') { + my $size = (length($value))/(1024.0 * 1024.0); + if (&upload_size_allowed($name,$size,$fname) eq 'ok') { + $env{"form.$name.filename"}=$fname; + $env{"form.$name.mimetype"}=$fmime; + &Apache::loncommon::add_to_env("form.$name",$value); + } + } else { + $env{"form.$name.filename"}=$fname; + $env{"form.$name.mimetype"}=$fmime; + &Apache::loncommon::add_to_env("form.$name",$value); + } + } else { + $value=~s/\s+$//s; + &Apache::loncommon::add_to_env("form.$name",$value); + } } if ($i<$#lines) { $i++; @@ -138,48 +222,141 @@ sub get_posted_cgi { $r->headers_in->unset('Content-length'); } -# handle the case of the single sign on user, at this point $r->user -# will be set and valid now need to find the loncapa user info and possibly -# balance them -# returns OK if it was a SSO and user was handled -# undef if not SSO or no means to hanle the user +=pod + +=item upload_size_allowed() + + Perform size checks for file uploads to essayresponse items in course context. + + Add form.HWFILESIZE.$part_$id to %env with file size (MB) + If file exceeds maximum allowed size, add form.HWFILETOOBIG.$part_$id to %env. + +=cut + +sub upload_size_allowed { + my ($name,$size,$fname) = @_; + if ($name =~ /^HWFILE(\w+)$/) { + my $ident = $1; + my $item = 'HWFILESIZE'.$ident; + my $savesize = sprintf("%.6f",$size); + &Apache::loncommon::add_to_env("form.$item",$savesize); + my $maxsize= &Apache::lonnet::EXT("resource.$ident.maxfilesize"); + if (!$maxsize) { + $maxsize = 10.0; # FIXME This should become a domain configuration. + } + if ($size > $maxsize) { + my $warn = 'HWFILETOOBIG'.$ident; + &Apache::loncommon::add_to_env("form.$warn",$fname); + return; + } + } + return 'ok'; +} + +=pod + +=item sso_login() + + handle the case of the single sign on user, at this point $r->user + will be set and valid now need to find the loncapa user info and possibly + balance them + returns OK if it was a SSO and user was handled + undef if not SSO or no means to hanle the user + +=cut + sub sso_login { - my ($r,$lonid,$handle) = @_; + my ($r,$handle) = @_; my $lonidsdir=$r->dir_config('lonIDsDir'); if (!($r->user && (!defined($env{'user.name'}) && !defined($env{'user.domain'})) - && (!$lonid || !-e "$lonidsdir/$handle.id" || $handle eq ''))) { + && ($handle eq ''))) { # not an SSO case or already logged in return undef; } + my ($user) = ($r->user =~ m/([a-zA-Z0-9_\-@.]*)/); + + my $query = $r->args; + my %form; + if ($query) { + my @items = ('role','symb'); + &Apache::loncommon::get_unprocessed_cgi($query,\@items); + foreach my $item (@items) { + if (defined($env{'form.'.$item})) { + $form{$item} = $env{'form.'.$item}; + } + } + } + my $domain = $r->dir_config('lonDefDomain'); - my $home=&Apache::lonnet::homeserver($r->user,$domain); + my $home=&Apache::lonnet::homeserver($user,$domain); if ($home !~ /(con_lost|no_host|no_such_host)/) { + &Apache::lonnet::logthis(" SSO authorized user $user "); if ($r->dir_config("lonBalancer") eq 'yes') { # login but immeaditly go to switch server to find us a new # machine - &Apache::lonauth::success($r,$r->user,$domain,$home,'noredirect'); + &Apache::lonauth::success($r,$user,$domain,$home,'noredirect'); + $env{'request.sso.login'} = 1; + if (defined($r->dir_config("lonSSOReloginServer"))) { + $env{'request.sso.reloginserver'} = + $r->dir_config('lonSSOReloginServer'); + } $r->internal_redirect('/adm/switchserver'); + $r->set_handlers('PerlHandler'=> undef); } else { # need to login them in, so generate the need data that # migrate expects to do login my %info=('ip' => $r->connection->remote_ip(), 'domain' => $domain, - 'username' => $r->user, + 'username' => $user, 'server' => $r->dir_config('lonHostID'), 'sso.login' => 1 ); + foreach my $item ('role','symb') { + if (exists($form{$item})) { + $info{$item} = $form{$item}; + } + } + if ($r->dir_config("ssodirecturl") == 1) { + $info{'origurl'} = $r->uri; + } + if (defined($r->dir_config("lonSSOReloginServer"))) { + $info{'sso.reloginserver'} = + $r->dir_config('lonSSOReloginServer'); + } my $token = &Apache::lonnet::tmpput(\%info, $r->dir_config('lonHostID')); $env{'form.token'} = $token; $r->internal_redirect('/adm/migrateuser'); + $r->set_handlers('PerlHandler'=> undef); } return OK; - } elsif (defined($r->dir_config('lonSSOUserUnkownRedirect'))) { - $r->internal_redirect($r->dir_config('lonSSOUserUnkownRedirect')); + } elsif (defined($r->dir_config('lonSSOUserUnknownRedirect'))) { + &Apache::lonnet::logthis(" SSO authorized unknown user $user "); + $r->subprocess_env->set('SSOUserUnknown' => $user); + $r->subprocess_env->set('SSOUserDomain' => $domain); + my @cancreate; + my %domconfig = + &Apache::lonnet::get_dom('configuration',['usercreation'],$domain); + if (ref($domconfig{'usercreation'}) eq 'HASH') { + if (ref($domconfig{'usercreation'}{'cancreate'}) eq 'HASH') { + if (ref($domconfig{'usercreation'}{'cancreate'}{'selfcreate'}) eq 'ARRAY') { + @cancreate = @{$domconfig{'usercreation'}{'cancreate'}{'selfcreate'}}; + } elsif (($domconfig{'usercreation'}{'cancreate'}{'selfcreate'} ne 'none') && + ($domconfig{'usercreation'}{'cancreate'}{'selfcreate'} ne '')) { + @cancreate = ($domconfig{'usercreation'}{'cancreate'}{'selfcreate'}); + } + } + } + if (grep(/^sso$/,@cancreate)) { + $r->internal_redirect('/adm/createaccount'); + } else { + $r->internal_redirect($r->dir_config('lonSSOUserUnknownRedirect')); + } + $r->set_handlers('PerlHandler'=> undef); return OK; } return undef; @@ -188,19 +365,19 @@ sub sso_login { sub handler { my $r = shift; my $requrl=$r->uri; - my %cookies=CGI::Cookie->parse($r->header_in('Cookie')); - my $lonid=$cookies{'lonID'}; - my $cookie; - my $lonidsdir=$r->dir_config('lonIDsDir'); + if (&Apache::lonnet::is_domainimage($requrl)) { + return OK; + } - my $handle; - if ($lonid) { - $handle=$lonid->value; - $handle=~s/\W//g; + if ($requrl =~ m{^/res/adm/pages/[^/]+\.(gif|png)$}) { + return OK; } - if (my $result = &sso_login($r,$lonid,$handle)) { - return $result + my $handle = &Apache::lonnet::check_for_valid_session($r); + + my $result = &sso_login($r,$handle); + if (defined($result)) { + return $result; } @@ -211,10 +388,10 @@ sub handler { if ($handle eq '') { $r->log_reason("Cookie $handle not valid", $r->filename); - } elsif ((-e "$lonidsdir/$handle.id") && ($handle ne '')) { + } elsif ($handle ne '') { # ------------------------------------------------------ Initialize Environment - + my $lonidsdir=$r->dir_config('lonIDsDir'); &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle); # --------------------------------------------------------- Initialize Language @@ -234,6 +411,22 @@ sub handler { } $env{'request.filename'} = $r->filename; $env{'request.noversionuri'} = &Apache::lonnet::deversion($requrl); + if ($requrl =~ m{^/adm/wrapper/ext/}) { + my $query = $r->args; + if ($query) { + my $preserved; + foreach my $pair (split(/&/,$query)) { + my ($name, $value) = split(/=/,$pair); + unless (($name eq 'symb') || ($name eq 'wrapperdisplay')) { + $preserved .= $pair.'&'; + } + } + $preserved =~ s/\&$//; + if ($preserved) { + $env{'request.external.querystring'} = $preserved; + } + } + } # -------------------------------------------------------- Load POST parameters &Apache::lonacc::get_posted_cgi($r); @@ -251,9 +444,29 @@ sub handler { &Apache::restrictedaccess::setup_handler($r); return OK; } + if ($access eq 'B') { + &Apache::blockedaccess::setup_handler($r); + return OK; + } if (($access ne '2') && ($access ne 'F')) { - $env{'user.error.msg'}="$requrl:bre:1:1:Access Denied"; - return HTTP_NOT_ACCEPTABLE; + if ($requrl =~ m{^/res/}) { + $access = &Apache::lonnet::allowed('bro',$requrl); + if ($access ne 'F') { + if ($requrl eq '/res/lib/templates/simpleproblem.problem/smpedit') { + $access = &Apache::lonnet::allowed('bre','/res/lib/templates/simpleproblem.problem'); + if ($access ne 'F') { + $env{'user.error.msg'}="$requrl:bre:1:1:Access Denied"; + return HTTP_NOT_ACCEPTABLE; + } + } else { + $env{'user.error.msg'}="$requrl:bre:1:1:Access Denied"; + return HTTP_NOT_ACCEPTABLE; + } + } + } else { + $env{'user.error.msg'}="$requrl:bre:1:1:Access Denied"; + return HTTP_NOT_ACCEPTABLE; + } } } if ($requrl =~ m|^/prtspool/|) { @@ -264,10 +477,19 @@ sub handler { return HTTP_NOT_ACCEPTABLE; } } + if ($requrl =~ m|^/zipspool/|) { + my $start='/zipspool/zipout/'.$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|uploaded)/} && $requrl !~ m{^/adm/[^/]+/[^/]+/aboutme/portfolio$ }x && + $requrl !~ m{^/adm/blockingstatus/.*$} && $requrl !~ m{^/+adm/(help|logout|restrictedaccess|randomlabel\.png)}) { $env{'request.querystring'}=$r->args; $env{'request.firsturl'}=$requrl; @@ -277,6 +499,7 @@ sub handler { if ($env{'request.course.id'}) { &Apache::lonnet::countacc($requrl); $requrl=~/\.(\w+)$/; + my $query=$r->args; if ((&Apache::loncommon::fileembstyle($1) eq 'ssi') || ($requrl=~/^\/adm\/.*\/(aboutme|navmaps|smppg|bulletinboard)(\?|$ )/x) || ($requrl=~/^\/adm\/wrapper\//) || @@ -284,7 +507,6 @@ sub handler { ($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($query,['symb']); @@ -331,6 +553,18 @@ sub handler { # ------------------------------------------------------- This is other content &Apache::lonnet::courseacclog($requrl); } + my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};; + my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};; + if ($requrl =~ m{^/+uploaded/\Q$cdom\E/\Q$cnum\E/docs/.+\.html?$}) { + if (&Apache::lonnet::allowed('mdc',$env{'request.course.id'})) { + if ($query) { + &Apache::loncommon::get_unprocessed_cgi($query,['forceedit']); + if ($env{'form.forceedit'}) { + $env{'request.state'} = 'edit'; + } + } + } + } } return OK; } @@ -369,64 +603,9 @@ sub handler { 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 +=pod =back =cut +