package bls12-381-hash

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bls12-381-hash
- Bls12_381_hash
  - Anemoi
    
    Parameters
  - Griffin
    
    Parameters
  - Poseidon
    
    Parameters
  - Rescue
    
    Parameters

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Implementation of an instantiation of Rescue over the scalar field of BLS12-381 for a security of 128 bits and with the permutation x^5. The parameters of the instantiation are:

state size = 3
number of rounds = 14

These parameters have been generated using this script.

type ctxt

Context of the permutation

val allocate_ctxt : 
  Bls12_381.Fr.t array array ->
  Bls12_381.Fr.t array ->
  int ->
  int ->
  ctxt

allocate_ctxt mds round_constants nb_rounds state_size. Allocate a context for a specific instance of Rescue

val get_state : ctxt -> Bls12_381.Fr.t array

Return the current state of the context

val get_state_size : ctxt -> int

Return the state size of the context

val set_state : ctxt -> Bls12_381.Fr.t array -> unit

set_state ctxt state. Set the context state to the given value. The value state must be of the same size than the expecting state

val apply_permutation : ctxt -> unit

Apply a permutation on the current state of the context

module Parameters : sig ... end

Set of parameters for BLS12-381, and parameters for specific instantiations given in the reference paper