gazagnaire.org / ocaml-hkdf
HMAC-based Extract-and-Expand Key Derivation Function (RFC 5869)
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ocaml-hkdf#

HMAC-based Extract-and-Expand Key Derivation Function (RFC 5869) for OCaml.

This is a rewrite of the upstream hkdf package (1.0.4) which depends on mirage-crypto and Cstruct.t. This version uses digestif for HMAC and plain bytes for all buffers, avoiding the mirage-crypto and cstruct dependency chain.

Installation#

Install with opam:

$ opam install nox-hkdf

If opam cannot find the package, it may not yet be released in the public opam-repository. Add the overlay repository, then install it:

$ opam repo add samoht https://tangled.org/gazagnaire.org/opam-overlay.git
$ opam update
$ opam install nox-hkdf

Usage#

let key = Hkdf.derive
  ~hash:`SHA256
  ~salt:Bytes.empty
  ~ikm:(Bytes.of_string "input key material")
  ~info:(Bytes.of_string "application context")
  ~len:32

References#

Licence#

ISC