Ruby string to raw binary

[Razer1610]

in PHP there is the hash() function that can return raw binary data.http://de2.php.net/manual/en/function.hash.phpI want to do the same in Ruby. How do I do that? I generate the hash with:\[code\]h = Digest::SHA2.new(512) << "hashme"\[/code\]PHP generates 32 byte of "raw binary output".