This is a minimal reimplementation of libmacaroons (https://github.com/rescrv/libmacaroons) in OCaml.

It consists of two findlib libraries: macaroons and macaroons.sodium. The first provides a functor over the required cryptographic operations, while the second uses libsodium for crypto, and is only installed if the OPAM package sodium is installed.

See the paper http://research.google.com/pubs/pub41892.html to learn about Macaroons.