Hashrat is a hash-generation utility that supports the md5, sha1, sha256,
sha512, whirlpool, jh-244, jh256, jh-384 and jh-512 hash functions, and also the
HMAC versions of those functions. It can output in 'traditional' format (same as
md5sum and shasum and the like), or it's own format. Hashes can be output in
octal, decimal, hexadecimal, uppercase hexadecimal or base64. It supports
directory recursion, hashing entire devices, and generating a hash for an entire
directory. It has a 'CGI' mode that can be used as a web-page to lookup hashes.