Source file redjubjub.ml

(*****************************************************************************)
(*                                                                           *)
(* Copyright (c) 2021 Danny Willems <be.danny.willems@gmail.com>             *)
(*                                                                           *)
(* Permission is hereby granted, free of charge, to any person obtaining a   *)
(* copy of this software and associated documentation files (the "Software"),*)
(* to deal in the Software without restriction, including without limitation *)
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(* Software is furnished to do so, subject to the following conditions:      *)
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(* DEALINGS IN THE SOFTWARE.                                                 *)
(*                                                                           *)
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module Make (Param : sig
  val generator : Jubjub.AffineEdwards.t
end) =
  Reddsa.MakeRedDSA
    (Jubjub.AffineEdwards)
    (struct
      let length = 512

      let generator = Param.generator

      module Blake2b = Mec_digestif.Make_BLAKE2B (struct
        let digest_size = 64
      end)

      let hash m =
        let ctx =
          Blake2b.init ~personalisation:(Bytes.of_string "Zcash_RedJubjubH") ()
        in
        let ctx = Blake2b.feed_bytes ctx m in
        let res_hexa = Blake2b.to_hex (Blake2b.get ctx) in
        let res_hexa_hex = `Hex res_hexa in
        let res_bytes = Hex.to_bytes res_hexa_hex in
        res_bytes

      let to_compressed = Jubjub.AffineEdwards.to_compressed

      let of_compressed_opt = Jubjub.AffineEdwards.of_compressed_opt
    end)