Crate jf_poseidon2

The Poseidon2 permutation.

Available instances

We have implemented Poseidon2 instances: (field, state_size)

• (Bls12_381::Fr, 2), (Bls12_381::Fr, 3)
• (Bn254::Fr, 3)

This implementation was based upon the following resources:

• https://github.com/HorizenLabs/poseidon2/blob/main/plain_implementations/src/poseidon2/poseidon2.rs
• https://eprint.iacr.org/2023/323.pdf
• https://github.com/Plonky3/Plonky3/blob/main/poseidon2/

Modules

constants

Poseidon2 Constants copied from https://github.com/HorizenLabs/poseidon2/blob/main/plain_implementations/src/poseidon2/

crhf

Collision-resistant Hash Function (CRHF) based on Poseidon2 permutation

sponge

Poseidon2-based Cryptographic Sponge

Macros

define_poseidon2_params

macros to derive instances that implements trait Poseidon2Params

Structs

Poseidon2

A Poseidon2 permutation family https://eprint.iacr.org/2023/323

Enums

Poseidon2Error

Poseidon2 Error type

Traits

Poseidon2Params

Parameters required for a Poseidon2 permutation instance.