instances.h

/*
 *  This file is part of the optimized implementation of the Rainier
 * signature scheme. See the accompanying documentation for complete details.
 *
 *  The code is provided under the MIT license, see LICENSE for
 *  more details.
 *  SPDX-License-Identifier: MIT
 */

#pragma once

#include <cstdint>
#include <cstdlib>

/** Parameter set names */
enum params_t {
  PARAMETER_SET_INVALID = 0,
  Rainier_3_L1_Param1 = 1,
  Rainier_3_L3_Param1 = 2,
  Rainier_3_L5_Param1 = 3,
  Rainier_4_L1_Param1 = 4,
  Rainier_4_L3_Param1 = 5,
  Rainier_4_L5_Param1 = 6,
  PARAMETER_SET_MAX_INDEX = 7
};

struct rain_params_t {
  uint32_t key_size;
  uint32_t block_size;
  uint32_t num_sboxes;
};

struct signature_instance_t {

  rain_params_t block_cipher_params;

  uint32_t digest_size;     /* bytes */
  uint32_t seed_size;       /* bytes */
  uint32_t num_repetitions; // tau
  uint32_t num_MPC_parties; // N

  params_t params;
};

const signature_instance_t &instance_get(params_t param);