Win32::FileSecurity - manage FileSecurity Discretionary Access Control Lists in perl
use Win32::FileSecurity;
This module offers control over the administration of system FileSecurity DACLs. You may want to use Get and EnumerateRights to get an idea of what mask values correspond to what rights as viewed from File Manager.
DELETE, READ_CONTROL, WRITE_DAC, WRITE_OWNER, SYNCHRONIZE, STANDARD_RIGHTS_REQUIRED, STANDARD_RIGHTS_READ, STANDARD_RIGHTS_WRITE, STANDARD_RIGHTS_EXECUTE, STANDARD_RIGHTS_ALL, SPECIFIC_RIGHTS_ALL, ACCESS_SYSTEM_SECURITY, MAXIMUM_ALLOWED, GENERIC_READ, GENERIC_WRITE, GENERIC_EXECUTE, GENERIC_ALL, F, FULL, R, READ, C, CHANGE
All of the functions return false if they fail, unless otherwise noted. Errors returned via $! containing both Win32 GetLastError() and a text message indicating Win32 function that failed.
Stores the value of named constant $name into $set. Same as $set = Win32::FileSecurity::NAME_OF_CONSTANT();.
Gets the DACLs of a file or directory.
Sets the DACL for a file or directory.
Turns the bitmask in $mask into a list of strings in @rightslist.
Takes a list of strings representing constants and returns a bitmasked integer value.
Entries take the form $permisshash{USERNAME} = $mask ;
# Gets the rights for all files listed on the command line.
use Win32::FileSecurity qw(Get EnumerateRights);
foreach( @ARGV ) {
next unless -e $_ ;
if ( Get( $_, \%hash ) ) {
while( ($name, $mask) = each %hash ) {
print "$name:\n\t";
EnumerateRights( $mask, \@happy ) ;
print join( "\n\t", @happy ), "\n";
}
}
else {
print( "Error #", int( $! ), ": $!" ) ;
}
}
# Gets existing DACL and modifies Administrator rights
use Win32::FileSecurity qw(MakeMask Get Set);
# These masks show up as Full Control in File Manager
$file = MakeMask( qw( FULL ) );
$dir = MakeMask( qw(
FULL
GENERIC_ALL
) );
foreach( @ARGV ) {
s/\\$//;
next unless -e;
Get( $_, \%hash ) ;
$hash{Administrator} = ( -d ) ? $dir : $file ;
Set( $_, \%hash ) ;
}
MakeMask( qw( FULL ) ); # for files
MakeMask( qw( READ GENERIC_READ GENERIC_EXECUTE ) ); # for directories
MakeMask( qw( CHANGE ) ); # for files
MakeMask( qw( CHANGE GENERIC_WRITE GENERIC_READ GENERIC_EXECUTE ) ); # for directories
MakeMask( qw( ADD GENERIC_READ GENERIC_EXECUTE ) ); # for directories only!
MakeMask( qw( FULL ) ); # for files
MakeMask( qw( FULL GENERIC_ALL ) ); # for directories
From Microsoft: check_sd http://premium.microsoft.com/download/msdn/samples/2760.exe
(thanks to Guert Schimmel at Sybase for turning me on to this one)
1.03 ALPHA 97-12-14
Imported diffs from 0.67 (parent) version
Pod fixes, @EXPORT list additions <gsar@activestate.com>
Fix unitialized vars on unknown ACLs <jmk@exc.bybyte.de>
CORE Win32 version imported from 0.66 <gsar@activestate.com>
Kludged bug in mapping bits to separate ACE's. Notably, this screwed up CHANGE access by leaving out a delete bit in the INHERIT_ONLY_ACE | OBJECT_INHERIT_ACE Access Control Entry.
May need to rethink...
Fixed bug in memory allocation check
Tested with 5.003 build 303
Added ISA exporter, and @EXPORT_OK
Added F, FULL, R, READ, C, CHANGE as composite pre-built mask names.
Added server\ to keys returned in hash from Get
Made constants and MakeMask case insensitive (I don't know why I did that)
Fixed mask comparison in ListDacl and Enumerate Rights from simple & mask to exact bit match ! ( ( x & y ) ^ x ) makes sure all bits in x are set in y
Fixed some "wild" pointers
Now suitable for file and directory permissions
Included ListDacl.exe in bundle for debugging
Added "intuitive" inheritance for directories, basically functions like FM triggered by presence of GENERIC_ rights this may need to change
see EXAMPLE2
Changed from AddAccessAllowedAce to AddAce for control over inheritance
Fixed memory allocation bug
Base functionality
Using AddAccessAllowedAce
Suitable for file permissions
