Diff for /loncom/auth/lonacc.pm between versions 1.96 and 1.121

version 1.96, 2006/09/05 17:33:06 version 1.121, 2008/11/25 14:19:07
Line 27 Line 27
 #  #
 ###  ###
   
   =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;  package Apache::lonacc;
   
 use strict;  use strict;
Line 36  use Apache::lonnet; Line 103  use Apache::lonnet;
 use Apache::loncommon();  use Apache::loncommon();
 use Apache::lonlocal;  use Apache::lonlocal;
 use Apache::restrictedaccess();  use Apache::restrictedaccess();
 use CGI::Cookie();  use Apache::blockedaccess(); 
 use Fcntl qw(:flock);  use Fcntl qw(:flock);
 use LONCAPA;  use LONCAPA;
   
Line 57  sub goodbye { Line 124  sub goodbye {
 ###############################################  ###############################################
   
 sub get_posted_cgi {  sub get_posted_cgi {
     my ($r) = @_;      my ($r,$fields) = @_;
   
     my $buffer;      my $buffer;
     if ($r->header_in('Content-length')) {      if ($r->header_in('Content-length')) {
  $r->read($buffer,$r->header_in('Content-length'),0);   $r->read($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(/&/,$buffer);   my @pairs=split(/&/,$buffer);
  my $pair;   my $pair;
  foreach $pair (@pairs) {   foreach $pair (@pairs) {
Line 72  sub get_posted_cgi { Line 140  sub get_posted_cgi {
     $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;      $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
     $name  =~ tr/+/ /;      $name  =~ tr/+/ /;
     $name  =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;      $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",$value);      &Apache::loncommon::add_to_env("form.$name",$value);
  }   }
     } else {      } else {
  my $contentsep=$1;   my ($contentsep) = ($content_type =~ /boundary=\"?([^\";,]+)\"?/);
  my @lines = split (/\n/,$buffer);   my @lines = split (/\n/,$buffer);
  my $name='';   my $name='';
  my $value='';   my $value='';
Line 83  sub get_posted_cgi { Line 154  sub get_posted_cgi {
  my $fmime='';   my $fmime='';
  my $i;   my $i;
  for ($i=0;$i<=$#lines;$i++) {   for ($i=0;$i<=$#lines;$i++) {
     if ($lines[$i]=~/^$contentsep/) {      if ($lines[$i]=~/^--\Q$contentsep\E/) {
  if ($name) {   if ($name) {
     chomp($value);      chomp($value);
     if ($fname) {                      if (ref($fields) eq 'ARRAY') {
  $env{"form.$name.filename"}=$fname;                          next if (!grep(/^\Q$name\E$/,@{$fields}));
  $env{"form.$name.mimetype"}=$fmime;                      }
     } else {                      if ($fname) {
  $value=~s/\s+$//s;                          if ($env{'form.symb'} ne '') {
     }                              my $size = (length($value))/(1024.0 * 1024.0);
     &Apache::loncommon::add_to_env("form.$name",$value);                              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) {   if ($i<$#lines) {
     $i++;      $i++;
Line 138  sub get_posted_cgi { Line 222  sub get_posted_cgi {
     $r->headers_in->unset('Content-length');      $r->headers_in->unset('Content-length');
 }  }
   
 # handle the case of the single sign on user, at this point $r->user   =pod
 # will be set and valid now need to find the loncapa user info and possibly  
 # balance them  =item upload_size_allowed()
 # returns OK if it was a SSO and user was handled  
 #         undef if not SSO or no means to hanle the user   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;
           &Apache::loncommon::add_to_env("form.$item",$size);
           my $maxsize= &Apache::lonnet::EXT("resource.$ident.maxfilesize");
           if (!$maxsize) {
               $maxsize = 100.0;
           }
           if ($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 {  sub sso_login {
     my ($r,$lonid,$handle) = @_;      my ($r,$handle) = @_;
   
     my $lonidsdir=$r->dir_config('lonIDsDir');      my $lonidsdir=$r->dir_config('lonIDsDir');
     if (!($r->user       if (!($r->user 
   && (!defined($env{'user.name'}) && !defined($env{'user.domain'}))    && (!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   # not an SSO case or already logged in
  return undef;   return undef;
     }      }
   
       my ($user) = ($r->user =~ m/([a-zA-Z0-9_\-@.]*)/);
   
     my $domain = $r->dir_config('lonDefDomain');      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)/) {      if ($home !~ /(con_lost|no_host|no_such_host)/) {
    &Apache::lonnet::logthis(" SSO authorized user $user ");
  if ($r->dir_config("lonBalancer") eq 'yes') {   if ($r->dir_config("lonBalancer") eq 'yes') {
     # login but immeaditly go to switch server to find us a new       # login but immeaditly go to switch server to find us a new 
     # machine      # machine
     &Apache::lonauth::success($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->internal_redirect('/adm/switchserver');
       $r->set_handlers('PerlHandler'=> undef);
  } else {   } else {
     # need to login them in, so generate the need data that      # need to login them in, so generate the need data that
     # migrate expects to do login      # migrate expects to do login
     my %info=('ip'        => $r->connection->remote_ip(),      my %info=('ip'        => $r->connection->remote_ip(),
       'domain'    => $domain,        'domain'    => $domain,
       'username'  => $r->user,        'username'  => $user,
       'server'    => $r->dir_config('lonHostID'),        'server'    => $r->dir_config('lonHostID'),
       'sso.login' => 1        'sso.login' => 1
       );        );
               if ($r->dir_config("ssodirecturl") == 1) {
                   $info{'origurl'} = $r->uri;
               }
               if (defined($r->dir_config("lonSSOReloginServer"))) {
                   $info{'sso.reloginserver'} = 
                       $r->dir_config('lonSSOReloginServer'); 
               }
     my $token =       my $token = 
  &Apache::lonnet::tmpput(\%info,   &Apache::lonnet::tmpput(\%info,
  $r->dir_config('lonHostID'));   $r->dir_config('lonHostID'));
     $env{'form.token'} = $token;      $env{'form.token'} = $token;
     $r->internal_redirect('/adm/migrateuser');      $r->internal_redirect('/adm/migrateuser');
       $r->set_handlers('PerlHandler'=> undef);
  }   }
  return OK;   return OK;
     } elsif (defined($r->dir_config('lonSSOUserUnkownRedirect'))) {      } elsif (defined($r->dir_config('lonSSOUserUnknownRedirect'))) {
  $r->internal_redirect($r->dir_config('lonSSOUserUnkownRedirect'));   &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 OK;
     }      }
     return undef;      return undef;
Line 188  sub sso_login { Line 347  sub sso_login {
 sub handler {  sub handler {
     my $r = shift;      my $r = shift;
     my $requrl=$r->uri;      my $requrl=$r->uri;
     my %cookies=CGI::Cookie->parse($r->header_in('Cookie'));      if (&Apache::lonnet::is_domainimage($requrl)) {
     my $lonid=$cookies{'lonID'};          return OK;
     my $cookie;  
     my $lonidsdir=$r->dir_config('lonIDsDir');  
   
     my $handle;  
     if ($lonid) {  
  $handle=$lonid->value;  
         $handle=~s/\W//g;  
     }      }
   
     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;
     }      }
   
   
Line 211  sub handler { Line 367  sub handler {
           
     if ($handle eq '') {      if ($handle eq '') {
  $r->log_reason("Cookie $handle not valid", $r->filename);    $r->log_reason("Cookie $handle not valid", $r->filename); 
     } elsif ((-e "$lonidsdir/$handle.id") && ($handle ne '')) {      } elsif ($handle ne '') {
   
 # ------------------------------------------------------ Initialize Environment  # ------------------------------------------------------ Initialize Environment
    my $lonidsdir=$r->dir_config('lonIDsDir');
  &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);   &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);
   
 # --------------------------------------------------------- Initialize Language  # --------------------------------------------------------- Initialize Language
Line 251  sub handler { Line 407  sub handler {
  &Apache::restrictedaccess::setup_handler($r);   &Apache::restrictedaccess::setup_handler($r);
  return OK;   return OK;
     }      }
               if ($access eq 'B') {
                   &Apache::blockedaccess::setup_handler($r);
                   return OK;
               }
     if (($access ne '2') && ($access ne 'F')) {      if (($access ne '2') && ($access ne 'F')) {
  $env{'user.error.msg'}="$requrl:bre:1:1:Access Denied";   $env{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
  return HTTP_NOT_ACCEPTABLE;    return HTTP_NOT_ACCEPTABLE; 
Line 264  sub handler { Line 424  sub handler {
  return HTTP_NOT_ACCEPTABLE;   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 ($env{'user.name'} eq 'public' &&    if ($env{'user.name'} eq 'public' && 
     $env{'user.domain'} eq 'public' &&      $env{'user.domain'} eq 'public' &&
     $requrl !~ m{^/+(res|public|uploaded)/} &&      $requrl !~ m{^/+(res|public|uploaded)/} &&
Line 369  sub handler { Line 537  sub handler {
 1;  1;
 __END__  __END__
   
 =head1 NAME  =pod
   
 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  =back
   
 =cut  =cut
   

Removed from v.1.96  
changed lines
  Added in v.1.121


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