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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,105 +1,107 @@ | ||
| //! The permutation module contains the function implementing the permutation used in Poseidon | ||
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|
||
| use crate::constants::SpongeConstants; | ||
| use crate::poseidon::{sbox, ArithmeticSpongeParams}; | ||
| use ark_ff::Field; | ||
|
|
||
| fn apply_mds_matrix<F: Field, SC: SpongeConstants>( | ||
| params: &ArithmeticSpongeParams<F>, | ||
| state: &[F], | ||
| ) -> Vec<F> { | ||
| if SC::PERM_FULL_MDS { | ||
| params | ||
| .mds | ||
| .iter() | ||
| .map(|m| { | ||
| state | ||
| .iter() | ||
| .zip(m.iter()) | ||
| .fold(F::zero(), |x, (s, &m)| m * s + x) | ||
| }) | ||
| .collect() | ||
| } else { | ||
| vec![ | ||
| state[0] + state[2], | ||
| state[0] + state[1], | ||
| state[1] + state[2], | ||
| ] | ||
| } | ||
| } | ||
|
|
||
| pub fn full_round<F: Field, SC: SpongeConstants>( | ||
| params: &ArithmeticSpongeParams<F>, | ||
| state: &mut Vec<F>, | ||
| r: usize, | ||
| ) { | ||
| for state_i in state.iter_mut() { | ||
| *state_i = sbox::<F, SC>(*state_i); | ||
| } | ||
| *state = apply_mds_matrix::<F, SC>(params, state); | ||
| for (i, x) in params.round_constants[r].iter().enumerate() { | ||
| state[i].add_assign(x); | ||
| } | ||
| } | ||
|
|
||
| pub fn half_rounds<F: Field, SC: SpongeConstants>( | ||
| params: &ArithmeticSpongeParams<F>, | ||
| state: &mut [F], | ||
| ) { | ||
| for r in 0..SC::PERM_HALF_ROUNDS_FULL { | ||
| for (i, x) in params.round_constants[r].iter().enumerate() { | ||
| state[i].add_assign(x); | ||
| } | ||
| for state_i in state.iter_mut() { | ||
| *state_i = sbox::<F, SC>(*state_i); | ||
| } | ||
| apply_mds_matrix::<F, SC>(params, state); | ||
| } | ||
|
|
||
| for r in 0..SC::PERM_ROUNDS_PARTIAL { | ||
| for (i, x) in params.round_constants[SC::PERM_HALF_ROUNDS_FULL + r] | ||
| .iter() | ||
| .enumerate() | ||
| { | ||
| state[i].add_assign(x); | ||
| } | ||
| state[0] = sbox::<F, SC>(state[0]); | ||
| apply_mds_matrix::<F, SC>(params, state); | ||
| } | ||
|
|
||
| for r in 0..SC::PERM_HALF_ROUNDS_FULL { | ||
| for (i, x) in params.round_constants | ||
| [SC::PERM_HALF_ROUNDS_FULL + SC::PERM_ROUNDS_PARTIAL + r] | ||
| .iter() | ||
| .enumerate() | ||
| { | ||
| state[i].add_assign(x); | ||
| } | ||
| for state_i in state.iter_mut() { | ||
| *state_i = sbox::<F, SC>(*state_i); | ||
| } | ||
| apply_mds_matrix::<F, SC>(params, state); | ||
| } | ||
| } | ||
|
|
||
| pub fn poseidon_block_cipher<F: Field, SC: SpongeConstants>( | ||
| params: &ArithmeticSpongeParams<F>, | ||
| state: &mut Vec<F>, | ||
| ) { | ||
| if SC::PERM_HALF_ROUNDS_FULL == 0 { | ||
| if SC::PERM_INITIAL_ARK { | ||
| for (i, x) in params.round_constants[0].iter().enumerate() { | ||
| state[i].add_assign(x); | ||
| } | ||
| for r in 0..SC::PERM_ROUNDS_FULL { | ||
| full_round::<F, SC>(params, state, r + 1); | ||
| } | ||
| } else { | ||
| for r in 0..SC::PERM_ROUNDS_FULL { | ||
| full_round::<F, SC>(params, state, r); | ||
| } | ||
| } | ||
| } else { | ||
| half_rounds::<F, SC>(params, state); | ||
| } | ||
| } | ||
| //! The permutation module contains the function implementing the permutation used in Poseidon | ||
|
|
||
| use crate::constants::SpongeConstants; | ||
| use crate::poseidon::{sbox, ArithmeticSpongeParams}; | ||
| use rayon::iter::{IndexedParallelIterator, IntoParallelRefIterator, ParallelIterator}; | ||
| use ark_ff::Field; | ||
|
|
||
| fn apply_mds_matrix<F: Field, SC: SpongeConstants>( | ||
| params: &ArithmeticSpongeParams<F>, | ||
| state: &[F], | ||
| ) -> Vec<F> { | ||
| if SC::PERM_FULL_MDS { | ||
| params | ||
| .mds | ||
| .par_iter() | ||
| .map(|m| { | ||
| state | ||
| .par_iter() | ||
| .zip(m.par_iter()) | ||
| .map(|(s, &m)| m * s) | ||
| .sum::<F>() | ||
| }) | ||
| .collect() | ||
| } else { | ||
| vec![ | ||
| state[0] + state[2], | ||
| state[0] + state[1], | ||
| state[1] + state[2], | ||
| ] | ||
| } | ||
| } | ||
|
|
||
| pub fn full_round<F: Field, SC: SpongeConstants>( | ||
| params: &ArithmeticSpongeParams<F>, | ||
| state: &mut Vec<F>, | ||
| r: usize, | ||
| ) { | ||
| for state_i in state.iter_mut() { | ||
| *state_i = sbox::<F, SC>(*state_i); | ||
| } | ||
| *state = apply_mds_matrix::<F, SC>(params, state); | ||
| for (i, x) in params.round_constants[r].iter().enumerate() { | ||
| state[i].add_assign(x); | ||
| } | ||
| } | ||
|
|
||
| pub fn half_rounds<F: Field, SC: SpongeConstants>( | ||
| params: &ArithmeticSpongeParams<F>, | ||
| state: &mut [F], | ||
| ) { | ||
| for r in 0..SC::PERM_HALF_ROUNDS_FULL { | ||
| for (i, x) in params.round_constants[r].iter().enumerate() { | ||
| state[i].add_assign(x); | ||
| } | ||
| for state_i in state.iter_mut() { | ||
| *state_i = sbox::<F, SC>(*state_i); | ||
| } | ||
| apply_mds_matrix::<F, SC>(params, state); | ||
| } | ||
|
|
||
| for r in 0..SC::PERM_ROUNDS_PARTIAL { | ||
| for (i, x) in params.round_constants[SC::PERM_HALF_ROUNDS_FULL + r] | ||
| .iter() | ||
| .enumerate() | ||
| { | ||
| state[i].add_assign(x); | ||
| } | ||
| state[0] = sbox::<F, SC>(state[0]); | ||
| apply_mds_matrix::<F, SC>(params, state); | ||
| } | ||
|
|
||
| for r in 0..SC::PERM_HALF_ROUNDS_FULL { | ||
| for (i, x) in params.round_constants | ||
| [SC::PERM_HALF_ROUNDS_FULL + SC::PERM_ROUNDS_PARTIAL + r] | ||
| .iter() | ||
| .enumerate() | ||
| { | ||
| state[i].add_assign(x); | ||
| } | ||
| for state_i in state.iter_mut() { | ||
| *state_i = sbox::<F, SC>(*state_i); | ||
| } | ||
| apply_mds_matrix::<F, SC>(params, state); | ||
| } | ||
| } | ||
|
|
||
| pub fn poseidon_block_cipher<F: Field, SC: SpongeConstants>( | ||
| params: &ArithmeticSpongeParams<F>, | ||
| state: &mut Vec<F>, | ||
| ) { | ||
| if SC::PERM_HALF_ROUNDS_FULL == 0 { | ||
| if SC::PERM_INITIAL_ARK { | ||
| for (i, x) in params.round_constants[0].iter().enumerate() { | ||
| state[i].add_assign(x); | ||
| } | ||
| for r in 0..SC::PERM_ROUNDS_FULL { | ||
| full_round::<F, SC>(params, state, r + 1); | ||
| } | ||
| } else { | ||
| for r in 0..SC::PERM_ROUNDS_FULL { | ||
| full_round::<F, SC>(params, state, r); | ||
| } | ||
| } | ||
| } else { | ||
| half_rounds::<F, SC>(params, state); | ||
| } | ||
| } |