Libmhash is a library that provides a uniform interface to several hash algorithms. It supports the basics for message authentication by following rfc2104 (HMAC). It also includes some key generation algorithms which are based on hash algorithms.
PHPRPMs is a collection of tools required to build PHP extensions "missing" from your RedHat/Fedora distribution (such as mhash, mcrypt, FDFtk, mssql, SQLite, APC, APD, dBase, filePro and others) as RPM add-ons to your "factory" PHP packages.