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Diff for /loncom/auth/loncacc.pm between versions 1.56 and 1.61

version 1.56, 2011/10/25 18:37:11 version 1.61, 2013/06/04 23:12:13
Line 1 Line 1
 # The LearningOnline Network  # The LearningOnline Network
 # Cookie Based Access Handler for Construction Area  # Cookie Based Access Handler for Authoring Spaces
 # (lonacc: 5/21/99,5/22,5/29,5/31 Gerd Kortemeyer)  # (lonacc: 5/21/99,5/22,5/29,5/31 Gerd Kortemeyer)
 #  #
 # $Id$  # $Id$
Line 31 Line 31
   
 =head1 NAME  =head1 NAME
   
 Apache::lonacc - Cookie Based Access Handler for Construction Area  Apache::lonacc - Cookie Based Access Handler for Authoring Spaces 
   
 =head1 SYNOPSIS  =head1 SYNOPSIS
   
Line 42  Invoked (for various locations) by /etc/ Line 42  Invoked (for various locations) by /etc/
 =head1 INTRODUCTION  =head1 INTRODUCTION
   
 This module enables cookie based authentication for construction area  This module enables cookie based authentication for construction area
 and is used to control access for three (essentially equivalent) URIs.  and is used to control access for the following two types of URI 
   (one for files, and one for directories):
   
  <LocationMatch "^/priv.*">   <LocationMatch "^/priv.*">
  <LocationMatch "^/\~.*">   <LocationMatch "^/priv.*/$">
  <LocationMatch "^/\~.*/$">  
   
 Whenever the client sends the cookie back to the server,   Whenever the client sends the cookie back to the server, 
 if the cookie is missing or invalid, the user is re-challenged  if the cookie is missing or invalid, the user is re-challenged
Line 71  store where they wanted to go (first url Line 71  store where they wanted to go (first url
   
 =back  =back
   
 =head1 OTHERSUBROUTINES  
   
 =over  
   
 =item constructaccess($url,$setpriv)  
   
 See if the owner domain and name  
 in the URL match those in the expected environment.  If so, return   
 two element list ($ownername,$ownerdomain).  Else, return null string.  
 If 'setpriv' is set to 'setpriv', it actually assigns the privileges.  
 =back  
   
 =cut  =cut
   
   
Line 96  use Apache::lonnet; Line 84  use Apache::lonnet;
 use Apache::lonacc;  use Apache::lonacc;
 use LONCAPA qw(:DEFAULT :match);  use LONCAPA qw(:DEFAULT :match);
   
 sub constructaccess {  
     my ($url,$setpriv)=@_;  
   
 # We do not allow editing of previous versions of files  
     if ($url=~/\.(\d+)\.(\w+)$/) { return ''; }  
   
 # Get username and domain from URL  
     my ($ownerdomain,$ownername)=($url=~/^(?:\/home\/httpd\/html\/|\/)priv\/($match_domain)\/($match_username)\//);  
   
 # The URL does not really point to any authorspace, forget it  
     unless (($ownername) && ($ownerdomain)) { return ''; }  
     
 # Now we need to see if the user has access to the authorspace of  
 # $ownername at $ownerdomain  
   
     if (($ownername eq $env{'user.name'}) && ($ownerdomain eq $env{'user.domain'})) {  
 # Real author for this?  
        if (exists($env{'user.priv.au./'.$ownerdomain.'/./'})) {  
           return ($ownername,$ownerdomain);  
        }  
     } else {  
 # Co-author for this?  
  if (exists($env{'user.priv.ca./'.$ownerdomain.'/'.$ownername.'./'}) ||  
     exists($env{'user.priv.aa./'.$ownerdomain.'/'.$ownername.'./'}) ) {  
     return ($ownername,$ownerdomain);  
  }  
     }  
 # We don't have any access right now. If we are not possibly going to do anything about this,  
 # we might as well leave  
    unless ($setpriv) { return ''; }  
   
 # Backdoor access?  
     my $allowed=&Apache::lonnet::allowed('eco',$ownerdomain);  
 # Nope  
     unless ($allowed) { return ''; }  
 # Looks like we may have access, but could be locked by the owner of the construction space  
     if ($allowed eq 'U') {  
         my %blocked=&Apache::lonnet::get('environment',['domcoord.author'],  
                                          $ownerdomain,$ownername);  
 # Is blocked by owner  
         if ($blocked{'domcoord.author'} eq 'blocked') { return ''; }  
     }  
     if (($allowed eq 'F') || ($allowed eq 'U')) {  
 # Grant temporary access  
         my $then=$env{'user.login.time'};  
         my $update==$env{'user.update.time'};  
         if (!$update) { $update = $then; }  
         my $refresh=$env{'user.refresh.time'};  
         if (!$refresh) { $refresh = $update; }  
         my $now = time;  
         &Apache::lonnet::check_adhoc_privs($ownerdomain,$ownername,  
                                            $update,$refresh,$now,'ca',  
                                            'constructaccess');  
         return($ownername,$ownerdomain);  
     }  
 # No business here  
     return '';  
 }  
   
 sub handler {  sub handler {
     my $r = shift;      my $r = shift;
     my $requrl=$r->uri;      my $requrl=$r->uri;
Line 176  sub handler { Line 105  sub handler {
  $env{'request.state'}    = "construct";   $env{'request.state'}    = "construct";
  $env{'request.filename'} = $r->filename;   $env{'request.filename'} = $r->filename;
   
  unless (&constructaccess($requrl,'setpriv')) {   my $allowed;
    my ($ownername,$ownerdom,$ownerhome) = 
               &Apache::lonnet::constructaccess($requrl,'setpriv');
           if (($ownername ne '') && ($ownerdom ne '') && ($ownerhome ne '')) {
               unless ($ownerhome eq 'no_host') {
                   my @hosts = &Apache::lonnet::current_machine_ids();
                   if (grep(/^\Q$ownerhome\E$/,@hosts)) {
                       $allowed = 1;
                   }
               }
           }
   
           unless ($allowed) {
     $r->log_reason("Unauthorized $requrl", $r->filename);       $r->log_reason("Unauthorized $requrl", $r->filename); 
     return HTTP_NOT_ACCEPTABLE;      return HTTP_NOT_ACCEPTABLE;
  }   }
Line 186  sub handler { Line 127  sub handler {
  &Apache::lonacc::get_posted_cgi($r);   &Apache::lonacc::get_posted_cgi($r);
   
  return OK;    return OK; 
     } else {       } else {
  $r->log_reason("Cookie $handle not valid", $r->filename)    $r->log_reason("Cookie $handle not valid", $r->filename) 
     }      }
   
Line 199  sub handler { Line 140  sub handler {
 1;  1;
 __END__  __END__
   
   
   
   
   
   
   
   
Removed from v.1.56  
changed lines
  Added in v.1.61

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