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Antoine Cyr committed Nov 5, 2024
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232 changes: 232 additions & 0 deletions ...o3/libs/blueprint/include/nil/blueprint/bbf/components/hashes/poseidon/plonk/poseidon.hpp
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//---------------------------------------------------------------------------//
// Copyright (c) 2023 Alexey Yashunsky <[email protected]>
// Copyright (c) 2023 Dmitrii Tabalin <[email protected]>
//
// MIT License
//
// 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 the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
//---------------------------------------------------------------------------//
// @file Declaration of interfaces for FRI verification array swapping component.
//---------------------------------------------------------------------------//

#ifndef CRYPTO3_BLUEPRINT_BBF_COMPONENTS_HASHES_POSEIDON_PLONK_HPP
#define CRYPTO3_BLUEPRINT_BBF_COMPONENTS_HASHES_POSEIDON_PLONK_HPP

#include <functional>
#include <nil/blueprint/bbf/components/hashes/poseidon/plonk/poseidon_constants.hpp>
#include <nil/blueprint/bbf/generic.hpp>
#include <nil/blueprint/blueprint/plonk/assignment.hpp>
#include <nil/blueprint/blueprint/plonk/circuit.hpp>
#include <nil/blueprint/component.hpp>
#include <nil/blueprint/manifest.hpp>
#include <nil/crypto3/zk/snark/arithmetization/plonk/constraint_system.hpp>
#include <nil/crypto3/zk/snark/arithmetization/plonk/params.hpp>

namespace nil {
namespace blueprint {
namespace bbf {
namespace components {

template<typename FieldType, GenerationStage stage>
class flexible_poseidon : public generic_component<FieldType, stage> {
using generic_component<FieldType, stage>::allocate;
using generic_component<FieldType, stage>::copy_constrain;
using generic_component<FieldType, stage>::constrain;

using component_type = generic_component<FieldType, stage>;
constexpr static const std::size_t total_rounds_amount =
nil::blueprint::bbf::components::detail::poseidon_constants<
FieldType>::total_rounds_amount;
constexpr static const std::size_t full_rounds_amount =
nil::blueprint::bbf::components::detail::poseidon_constants<
FieldType>::full_rounds_amount;
constexpr static const std::size_t partial_rounds_amount =
nil::blueprint::bbf::components::detail::poseidon_constants<
FieldType>::partial_rounds_amount;
constexpr static const std::size_t state_size =
nil::blueprint::bbf::components::detail::poseidon_constants<
FieldType>::state_size;
constexpr static const std::size_t sbox_alpha =
nil::blueprint::bbf::components::detail::poseidon_constants<
FieldType>::sbox_alpha;
constexpr static const std::size_t mina_version =
nil::blueprint::bbf::components::detail::poseidon_constants<
FieldType>::mina_version;

constexpr static const std::array<
std::array<typename FieldType::value_type, state_size>, state_size>
mds = nil::blueprint::bbf::components::detail::poseidon_constants<
FieldType>::mds;
constexpr static const std::array<
std::array<typename FieldType::value_type, state_size>, total_rounds_amount>
round_constant =
nil::blueprint::bbf::components::detail::poseidon_constants<
FieldType>::round_constant;

public:
using typename generic_component<FieldType, stage>::TYPE;
using typename generic_component<FieldType, stage>::context_type;

public:
static nil::crypto3::zk::snark::plonk_table_description<FieldType>
get_table_description(std::size_t witness) {
constexpr std::size_t total_cells = (total_rounds_amount + 2) * state_size;
constexpr std::size_t public_inputs = 1;
constexpr std::size_t constants = 0;
std::size_t selectors = (total_cells + witness - 1) / witness;
nil::crypto3::zk::snark::plonk_table_description<FieldType> desc(
witness, public_inputs, constants, selectors);
desc.usable_rows_amount = selectors;
return desc;
}

public:
TYPE input[state_size];
TYPE res[state_size];

flexible_poseidon(context_type &context_object,
std::array<TYPE, state_size> input_state,
bool make_links = true)
: generic_component<FieldType, stage>(context_object) {
TYPE X[total_rounds_amount + 1][state_size];
TYPE W[(total_rounds_amount + 1) * state_size];

if constexpr (stage == GenerationStage::ASSIGNMENT) {
X[0][0] = input_state[0];
X[0][1] = input_state[1];
X[0][2] = input_state[2];
}

if (make_links) {
copy_constrain(X[0][0], input_state[0]);
copy_constrain(X[0][1], input_state[1]);
copy_constrain(X[0][2], input_state[2]);
}

W[0] = X[0][0];
W[1] = X[0][1];
W[2] = X[0][2];

allocate(W[0]);
allocate(W[1]);
allocate(W[2]);

static_assert(state_size == 3);

// Mina version
if (mina_version) {
// First full rounds
for (std::size_t i = 0; i < full_rounds_amount / 2; i++) {
for (std::size_t j = 0; j < state_size; j++) {
X[i + 1][j] = X[i][0].pow(sbox_alpha) * mds[j][0] +
X[i][1].pow(sbox_alpha) * mds[j][1] +
X[i][2].pow(sbox_alpha) * mds[j][2] +
round_constant[i][j];
W[(i + 1) * 3 + j] = X[i + 1][j];
allocate(W[(i + 1) * 3 + j]);
constrain(X[i + 1][j] - W[(i + 1) * 3 + j]);
}
}

// Middle partial rounds
for (std::size_t i = full_rounds_amount / 2;
i < partial_rounds_amount + full_rounds_amount / 2; i++) {
for (std::size_t j = 0; j < state_size; j++) {
X[i + 1][j] = X[i][0].pow(sbox_alpha) * mds[j][0] +
X[i][1] * mds[j][1] + X[i][2] * mds[j][2] +
round_constant[i][j];
W[(i + 1) * 3 + j] = X[i + 1][j];
allocate(W[(i + 1) * 3 + j]);
constrain(X[i + 1][j] - W[(i + 1) * 3 + j]);
}
}

// Last full rounds
for (std::size_t i = partial_rounds_amount + full_rounds_amount / 2;
i < total_rounds_amount; i++) {
for (std::size_t j = 0; j < state_size; j++) {
X[i + 1][j] = X[i][0].pow(sbox_alpha) * mds[j][0] +
X[i][1].pow(sbox_alpha) * mds[j][1] +
X[i][2].pow(sbox_alpha) * mds[j][2] +
round_constant[i][j];
W[(i + 1) * 3 + j] = X[i + 1][j];
allocate(W[(i + 1) * 3 + j]);
constrain(X[i + 1][j] - W[(i + 1) * 3 + j]);
}
}
} else {
// Version with original constants
// First full rounds
for (std::size_t i = 0; i < full_rounds_amount / 2; i++) {
for (std::size_t j = 0; j < state_size; j++) {
X[i + 1][j] = (X[i][0] + round_constant[i][0]).pow(sbox_alpha) *
mds[j][0] +
(X[i][1] + round_constant[i][1]).pow(sbox_alpha) *
mds[j][1] +
(X[i][2] + round_constant[i][2]).pow(sbox_alpha) *
mds[j][2];
W[(i + 1) * 3 + j] = X[i + 1][j];
allocate(W[(i + 1) * 3 + j]);
constrain(X[i + 1][j] - W[(i + 1) * 3 + j]);
}
}
// Middle partial rounds
for (std::size_t i = full_rounds_amount / 2;
i < partial_rounds_amount + full_rounds_amount / 2; i++) {
for (std::size_t j = 0; j < state_size; j++) {
X[i + 1][j] = (X[i][0] + round_constant[i][0]).pow(sbox_alpha) *
mds[j][0] +
(X[i][1] + round_constant[i][1]) * mds[j][1] +
(X[i][2] + round_constant[i][2]) * mds[j][2];
W[(i + 1) * 3 + j] = X[i + 1][j];
allocate(W[(i + 1) * 3 + j]);
constrain(X[i + 1][j] - W[(i + 1) * 3 + j]);
}
}
// Final full rounds
for (std::size_t i = partial_rounds_amount + full_rounds_amount / 2;
i < total_rounds_amount; i++) {
for (std::size_t j = 0; j < state_size; j++) {
X[i + 1][j] = (X[i][0] + round_constant[i][0]).pow(sbox_alpha) *
mds[j][0] +
(X[i][1] + round_constant[i][1]).pow(sbox_alpha) *
mds[j][1] +
(X[i][2] + round_constant[i][2]).pow(sbox_alpha) *
mds[j][2];
W[(i + 1) * 3 + j] = X[i + 1][j];
allocate(W[(i + 1) * 3 + j]);
constrain(X[i + 1][j] - W[(i + 1) * 3 + j]);
}
}
}
input[0] = X[0][0];
input[1] = X[0][1];
input[2] = X[0][2];
res[0] = X[total_rounds_amount][0];
res[1] = X[total_rounds_amount][1];
res[2] = X[total_rounds_amount][2];
}
};

} // namespace components
} // namespace bbf
} // namespace blueprint
} // namespace nil

#endif // CRYPTO3_BLUEPRINT_BBF_COMPONENTS_HASHES_POSEIDON_PLONK_HPP
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