internal-ascon-m2.h

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/*
 * Copyright (C) 2021 Southern Storm Software, Pty Ltd.
 *
 * 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.
 */

#ifndef LW_INTERNAL_ASCON_M2_H
#define LW_INTERNAL_ASCON_M2_H

#include "internal-ascon.h"

#ifdef __cplusplus
extern "C" {
#endif

typedef struct
{
    ascon_state_t a;    
    ascon_state_t b;    
} ascon_masked_state_x2_t;

typedef union
{
    uint64_t S[6];      
    uint32_t W[12];     
} ascon_masked_key_x2_t;

void ascon_permute_masked_x2
    (ascon_masked_state_x2_t *state, uint8_t first_round);

void ascon_mask_key_128_x2
    (ascon_masked_key_x2_t *mk, uint64_t iv, const unsigned char *k);

void ascon_mask_key_160_x2
    (ascon_masked_key_x2_t *mk, uint32_t iv, const unsigned char *k);

void ascon_masked_init_key_x2
    (ascon_masked_state_x2_t *state, const ascon_masked_key_x2_t *mk,
     const unsigned char *npub, int is_160_bit);

void ascon_masked_finalize_128_x2
    (ascon_masked_state_x2_t *state, const ascon_masked_key_x2_t *mk,
     unsigned char tag[16]);

void ascon_masked_finalize_128a_x2
    (ascon_masked_state_x2_t *state, const ascon_masked_key_x2_t *mk,
     unsigned char tag[16]);

void ascon_masked_finalize_80pq_x2
    (ascon_masked_state_x2_t *state, const ascon_masked_key_x2_t *mk,
     unsigned char tag[16]);

void ascon_masked_absorb_8_x2
    (ascon_masked_state_x2_t *state, const unsigned char *data,
     size_t len, uint8_t first_round);

void ascon_masked_absorb_16_x2
    (ascon_masked_state_x2_t *state, const unsigned char *data,
     size_t len, uint8_t first_round);

void ascon_masked_encrypt_8_x2
    (ascon_masked_state_x2_t *state, unsigned char *dest,
     const unsigned char *src, size_t len, uint8_t first_round);

void ascon_masked_decrypt_8_x2
    (ascon_masked_state_x2_t *state, unsigned char *dest,
     const unsigned char *src, size_t len, uint8_t first_round);

void ascon_masked_encrypt_16_x2
    (ascon_masked_state_x2_t *state, unsigned char *dest,
     const unsigned char *src, size_t len, uint8_t first_round);

void ascon_masked_decrypt_16_x2
    (ascon_masked_state_x2_t *state, unsigned char *dest,
     const unsigned char *src, size_t len, uint8_t first_round);

#if ASCON_SLICED
#define ascon_masked_separator_x2(state) ((state)->a.W[8] ^= 0x01)
#else
#define ascon_masked_separator_x2(state) ((state)->a.S[4] ^= 0x01)
#endif

void ascon_masked_refresh_x2(ascon_masked_state_x2_t *state);

void ascon_masked_key_refresh_x2(ascon_masked_key_x2_t *mk);

#ifdef __cplusplus
}
#endif

#endif