RHash is a console utility and library for computing and verifying hash sums
of files.  It supports CRC32, MD4, MD5, SHA1, SHA256, SHA512, SHA3, Tiger,
TTH, Torrent BTIH, AICH, ED2K, GOST R 34.11-94, RIPEMD-160, HAS-160, EDON-R
256/512, Whirlpool, and Snefru-128/256 hash sums.  Its features are:

  * Can calculate Magnet links
  * Output in a predefined (SFV, BSD-like) or a user-defined format
  * Ability to process directories recursively
  * Updating existing hash-files (adding hash sums of files missing in a
    hash-file)
  * Portable, written in pure C, small in size, open source (MIT license)

Perl wrapper is available as `security/p5-Crypt-RHash' port.