permutation.h

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/*
 * Copyright (C) 2022 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
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 */
 
#ifndef ASCON_PERMUTATION_H
#define ASCON_PERMUTATION_H
 
#include <stdint.h>
#include <stddef.h>
 
#ifdef __cplusplus
extern "C" {
#endif
 
typedef union
{
    uint64_t S[5];                  
    uint32_t W[10];                 
    uint8_t B[40];                  
    void *P[40 / sizeof(void *)];   
} ascon_state_t;
 
void ascon_init(ascon_state_t *state);
 
void ascon_free(ascon_state_t *state);
 
void ascon_add_bytes
    (ascon_state_t *state, const uint8_t *data, unsigned offset, unsigned size);
 
void ascon_overwrite_bytes
    (ascon_state_t *state, const uint8_t *data, unsigned offset, unsigned size);
 
void ascon_overwrite_with_zeroes
    (ascon_state_t *state, unsigned offset, unsigned size);
 
void ascon_extract_bytes
    (const ascon_state_t *state, uint8_t *data, unsigned offset, unsigned size);
 
void ascon_extract_and_add_bytes
    (const ascon_state_t *state, const uint8_t *input, uint8_t *output,
     unsigned offset, unsigned size);
 
void ascon_extract_and_overwrite_bytes
    (ascon_state_t *state, const uint8_t *input, uint8_t *output,
     unsigned offset, unsigned size);
 
void ascon_permute(ascon_state_t *state, uint8_t first_round);
 
#define ascon_permute12(state) ascon_permute((state), 0)
 
#define ascon_permute8(state) ascon_permute((state), 4)
 
#define ascon_permute6(state) ascon_permute((state), 6)
 
void ascon_release(ascon_state_t *state);
 
void ascon_acquire(ascon_state_t *state);
 
void ascon_copy(ascon_state_t *dest, const ascon_state_t *src);
 
#ifdef __cplusplus
}
#endif
 
#endif