dcfldd is a modified version of dd with nice features such as md5 hashing. DCFLdd was created by the US Department of Defense Computer Forensics Lab. I cannot find any official website for this package, so i followed opendarwin's example here: http://dcfldd.darwinports.com/
Created attachment 25373 [details] dcfldd-1.0.ebuild
now in portage, thanks for the ebuild