- Dev-Editor is now able to forbid accessing a file using the configuration file

[devedit.git] / modules / Tool.pm

diff --git a/modules/Tool.pm b/modules/Tool.pm
index 75b9f31b6c8e247e7f9342b466f490d2abfae3e8..d9a20f7ea72bccea4401552fe4872def65c0e823 100644 (file)
--- a/modules/Tool.pm
+++ b/modules/Tool.pm
@@ -5,15 +5,19 @@ package Tool;
 #
 # Some shared sub routines
 #
 #
 # Some shared sub routines
 #

-# Author:        Patrick Canterino <patshaping@gmx.net>
-# Last modified: 2003-10-27
+# Author:        Patrick Canterino <patrick@patshaping.de>
+# Last modified: 2005-06-10

 #
 
 use strict;
 
 use vars qw(@EXPORT);
 
 #
 
 use strict;
 
 use vars qw(@EXPORT);
 

-use CGI qw(redirect);
+use CGI qw(redirect
+           escape
+           virtual_host
+           https);
+

 use Cwd qw(abs_path);
 use File::Spec;
 
 use Cwd qw(abs_path);
 use File::Spec;
 


@@ -24,12 +28,18 @@ use base qw(Exporter);
 @EXPORT = qw(check_path
              clean_path
              devedit_reload
 @EXPORT = qw(check_path
              clean_path
              devedit_reload

+             dos_wildcard_match
+             encode_html
+             equal_url

              file_name
              file_name

+             is_forbidden_file
+             mode_string
+             multi_string

              upper_path);
 
 # check_path()
 #
              upper_path);
 
 # check_path()
 #

-# Check, if a virtual path is above a virtual root directory
+# Check if a virtual path is above a virtual root directory

 # (currently no check if the path exists - check otherwise!)
 #
 # Params: 1. Virtual root directory
 # (currently no check if the path exists - check otherwise!)
 #
 # Params: 1. Virtual root directory


@@ -47,37 +57,36 @@ sub check_path($$)
  $root = abs_path($root);
  $root = File::Spec->canonpath($root);
 
  $root = abs_path($root);
  $root = File::Spec->canonpath($root);
 

- $path =~ s!^/{1}!!;
- $path = $root."/".$path;
+ $path =~ tr!\\!/!;
+ $path =~ s!^/+!!;
+ $path =  $root.'/'.$path;

 
 

- unless(-d $path)
- {
-  # The path points to a file
-  # We have to extract the directory name and create the absolute path
+ # We extract the last part of the path and create the absolute path

 
 

-  my $dir  = upper_path($path);
-  my $file = file_name($path);
+ my $first = upper_path($path);
+ $first    = File::Spec->canonpath($first);
+ $first    = abs_path($first);

 
 

-  $dir  = abs_path($dir);
-  $path = $dir."/".$file;
- }
- else
+ my $last  = file_name($path);
+
+ if(-d $first.'/'.$last && not -l $first.'/'.$last)

  {
  {

-  $path = abs_path($path);
+  $first = abs_path($first.'/'.$last);
+  $last  = '';

  }
 
  }
 

- $path = File::Spec->canonpath($path);
+ $path = File::Spec->canonpath($first.'/'.$last);

 
  # Check if the path is above the root directory
 
 
  # Check if the path is above the root directory
 

- return if(index($path,$root) == -1);
+ return if(index($path,$root) != 0);

 
  # Create short path name
 
  my $short_path = substr($path,length($root));
 
  # Create short path name
 
  my $short_path = substr($path,length($root));

- $short_path =~ tr!\\!\/!;
- $short_path = "/".$short_path unless($short_path =~ m!^/!);
- $short_path = $short_path."/" if($short_path !~ m!/$! && -d $path);
+ $short_path =~ tr!\\!/!;
+ $short_path = '/'.$short_path if($short_path !~ m!^/!);
+ $short_path = $short_path.'/' if($short_path !~ m!/$! && -d $path && not -l $path);

 
  return ($path,$short_path);
 }
 
  return ($path,$short_path);
 }


@@ -106,28 +115,127 @@ sub clean_path($)
 # with some other parameters
 #
 # Params: Hash Reference (will be merged to a query string)
 # with some other parameters
 #
 # Params: Hash Reference (will be merged to a query string)

+#         (optional)

 #
 # Return: HTTP redirection header (Scalar Reference)
 
 #
 # Return: HTTP redirection header (Scalar Reference)
 

-sub devedit_reload($)
+sub devedit_reload(;$)

 {
  my $params = shift;
 {
  my $params = shift;

- my @list;

 
 

- while(my ($param,$value) = each(%$params))
+ # Detect the protocol (simple HTTP or SSL encrypted HTTP)
+ # and check if the server listens on the default port
+
+ my $protocol = '';
+ my $port     = '';
+
+ if(https)

  {
  {

-  push(@list,$param."=".$value);
+  # SSL encrypted HTTP (HTTPS)
+
+  $protocol = 'https';
+  $port     = ':'.$ENV{'SERVER_PORT'} if($ENV{'SERVER_PORT'} != 443);

  }
  }

+ else
+ {
+  # Simple HTTP

 
 

- my $query  = join("&",@list);
- my $header = redirect("http://$ENV{'HTTP_HOST'}$ENV{'SCRIPT_NAME'}?$query");
+  $protocol = 'http';
+  $port     = ':'.$ENV{'SERVER_PORT'} if($ENV{'SERVER_PORT'} != 80);
+ }
+
+ # The following code is grabbed from Template::_query of
+ # Andre Malo's selfforum (http://sourceforge.net/projects/selfforum/)
+ # and modified by Patrick Canterino
+
+ my $query = '';
+
+ if(ref($params) eq 'HASH')
+ {
+  $query = '?'.join ('&' =>
+    map {
+      (ref)
+      ? map{escape ($_).'='.escape ($params -> {$_})} @{$params -> {$_}}
+      : escape ($_).'='.escape ($params -> {$_})
+    } keys %$params
+  );
+ }
+
+ # Create the redirection header
+
+ my $header = redirect($protocol.'://'.virtual_host.$port.$ENV{'SCRIPT_NAME'}.$query);

 
  return \$header;
 }
 
 
  return \$header;
 }
 

+# dos_wildcard_match()
+#
+# Check if a string matches against a DOS-style wildcard
+#
+# Params: 1. Pattern
+#         2. String
+#
+# Return: Status code (Boolean)
+
+sub dos_wildcard_match($$)
+{
+ my ($pattern,$string) = @_;
+
+ # The following part is stolen from File::DosGlob
+
+ # escape regex metachars but not glob chars
+ $pattern =~ s:([].+^\-\${}[|]):\\$1:g;
+ # and convert DOS-style wildcards to regex
+ $pattern =~ s/\*/.*/g;
+ $pattern =~ s/\?/.?/g;
+
+ return ($string =~ m|^$pattern$|is);
+}
+
+# encode_html()
+#
+# Encode HTML control characters (< > " &)
+#
+# Params: String to encode
+#
+# Return: Encoded string
+
+sub encode_html($)
+{
+ my $string = shift;
+
+ $string =~ s/&/&amp;/g;
+ $string =~ s/</&lt;/g;
+ $string =~ s/>/&gt;/g;
+ $string =~ s/"/&quot;/g;
+
+ return $string;
+}
+
+# equal_url()
+#
+# Create URL equal to a file or directory
+#
+# Params: 1. HTTP root
+#         2. Relative path
+#
+# Return: Formatted link (String)
+
+sub equal_url($$)
+{
+ my ($root,$path) = @_;
+ my $url;
+
+ $root =~ s!/+$!!;
+ $path =~ s!^/+!!;
+ $url  =  $root.'/'.$path;
+
+ return $url;
+}
+

 # file_name()
 #
 # file_name()
 #

-# Returns the last path of a path
+# Return the last part of a path

 #
 # Params: Path
 #
 #
 # Params: Path
 #


@@ -138,23 +246,103 @@ sub file_name($)
  my $path =  shift;
  $path    =~ tr!\\!/!;
 
  my $path =  shift;
  $path    =~ tr!\\!/!;
 

- unless($path eq "/")
+ unless($path =~ m!^/+$! || ($^O eq 'MSWin32' && $path =~ m!^[a-z]:/+$!i))

  {
  {

-  $path = substr($path,0,-1) if($path =~ m!/$!);
-  $path = substr($path,rindex($path,"/")+1);
+  $path =~ s!/+$!!;
+  $path =  substr($path,rindex($path,'/')+1);

  }
 
  return $path;
 }
 
  }
 
  return $path;
 }
 

-# upper_path()
+# is_forbidden_file()
+#
+# Check if a file is in the list of forbidden files
+#
+# Params: 1. Array Reference containing the list
+#         2. Filename to check

 #
 #

-# Truncate a path in one of the following ways:
+# Return: Status code (Boolean)
+
+sub is_forbidden_file($$)
+{
+ my ($list,$file) = @_;
+ $file =~ s!/+$!!g;
+
+ foreach my $entry(@$list)
+ {
+  return 1 if($file eq $entry);
+  return 1 if(index($file,$entry.'/') == 0);
+ }
+
+ return;
+}
+
+# mode_string()
+#
+# Convert a file mode number into a human readable string (rwxr-x-r-x)
+# (also supports SetUID, SetGID and Sticky Bit)
+#
+# Params: File mode number
+#
+# Return: Human readable mode string
+
+sub mode_string($)
+{
+ my $mode   = shift;
+ my $string = '';
+
+ # User
+
+ $string  = ($mode & 00400) ? 'r' : '-';
+ $string .= ($mode & 00200) ? 'w' : '-';
+ $string .= ($mode & 00100) ? (($mode & 04000) ? 's' : 'x') :
+                               ($mode & 04000) ? 'S' : '-';
+
+ # Group
+
+ $string .= ($mode & 00040) ? 'r' : '-';
+ $string .= ($mode & 00020) ? 'w' : '-';
+ $string .= ($mode & 00010) ? (($mode & 02000) ? 's' : 'x') :
+                               ($mode & 02000) ? 'S' : '-';
+
+ # Other
+
+ $string .= ($mode & 00004) ? 'r' : '-';
+ $string .= ($mode & 00002) ? 'w' : '-';
+ $string .= ($mode & 00001) ? (($mode & 01000) ? 't' : 'x') :
+                               ($mode & 01000) ? 'T' : '-';
+
+ return $string;
+}
+
+# multi_string()
+#
+# Create a Hash Reference containing three forms of a string
+#
+# Params: String
+#
+# Return: Hash Reference:
+#         normal => Normal form of the string
+#         html   => HTML encoded form (see encode_html())
+#         url    => URL encoded form
+
+sub multi_string($)
+{
+ my $string = shift;
+ my %multi;
+
+ $multi{'normal'} = $string;
+ $multi{'html'}   = encode_html($string);
+ $multi{'url'}    = escape($string);
+
+ return \%multi;
+}
+
+# upper_path()

 #
 #

-# - If the path points to a directory, the upper directory
-#   will be returned.
-# - If the path points to a file, the directory containing
-#   the file will be returned.
+# Remove the last part of a path
+# (the resulting path contains a trailing slash)

 #
 # Params: Path
 #
 #
 # Params: Path
 #


@@ -165,10 +353,10 @@ sub upper_path($)
  my $path =  shift;
  $path    =~ tr!\\!/!;
 
  my $path =  shift;
  $path    =~ tr!\\!/!;
 

- unless($path eq "/")
+ unless($path =~ m!^/+$! || ($^O eq 'MSWin32' && $path =~ m!^[a-z]:/+$!i))

  {
  {

-  $path = substr($path,0,-1) if($path =~ m!/$!);
-  $path = substr($path,0,rindex($path,"/")+1);
+  $path =~ s!/+$!!;
+  $path =  substr($path,0,rindex($path,'/')+1);

  }
 
  return $path;
  }
 
  return $path;