ascon-xof.h

/*
 * 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
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 */

#ifndef LWCRYPTO_ASCON_XOF_H
#define LWCRYPTO_ASCON_XOF_H

#include <stddef.h>

#ifdef __cplusplus
extern "C" {
#endif

#define ASCON_HASH_SIZE 32

#define ASCON_XOF_RATE 8

typedef union
{
    struct {
        unsigned char state[40]; 
        unsigned char count;     
        unsigned char mode;      
    } s;                         
    unsigned long long align;    
} ascon_xof_state_t;

int ascon_xof
    (unsigned char *out, const unsigned char *in, size_t inlen);

void ascon_xof_init(ascon_xof_state_t *state);

void ascon_xof_init_fixed(ascon_xof_state_t *state, size_t outlen);

void ascon_xof_absorb
    (ascon_xof_state_t *state, const unsigned char *in, size_t inlen);

void ascon_xof_squeeze
    (ascon_xof_state_t *state, unsigned char *out, size_t outlen);

void ascon_xof_pad(ascon_xof_state_t *state);

int ascon_xofa
    (unsigned char *out, const unsigned char *in, size_t inlen);

void ascon_xofa_init(ascon_xof_state_t *state);

void ascon_xofa_init_fixed(ascon_xof_state_t *state, size_t outlen);

void ascon_xofa_absorb
    (ascon_xof_state_t *state, const unsigned char *in, size_t inlen);

void ascon_xofa_squeeze
    (ascon_xof_state_t *state, unsigned char *out, size_t outlen);

void ascon_xofa_pad(ascon_xof_state_t *state);

#ifdef __cplusplus
}
#endif

#endif