internal-tinyjambu.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
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 * DEALINGS IN THE SOFTWARE.
 */

#ifndef LW_INTERNAL_TINYJAMBU_H
#define LW_INTERNAL_TINYJAMBU_H

#include "internal-util.h"

#ifdef __cplusplus
extern "C" {
#endif

#if defined(LW_UTIL_CPU_IS_64BIT)
#define TINY_JAMBU_64BIT 1
#else
#define TINY_JAMBU_64BIT 0
#endif

typedef struct
{
#if TINY_JAMBU_64BIT
    uint64_t t[2];      
#else
    uint32_t s[4];      
#endif
} tiny_jambu_state_t;

#if TINY_JAMBU_64BIT
typedef uint64_t tiny_jambu_key_word_t;
#else
typedef uint32_t tiny_jambu_key_word_t;
#endif

#if TINY_JAMBU_64BIT
#define tiny_jambu_key_load_even(ptr) \
    ((tiny_jambu_key_word_t)(~(le_load_word32((ptr)))))
#define tiny_jambu_key_load_odd(ptr) \
    (((tiny_jambu_key_word_t)(~(le_load_word32((ptr))))) << 32)
#else
#define tiny_jambu_key_load_even(ptr) \
    ((tiny_jambu_key_word_t)(~(le_load_word32((ptr)))))
#define tiny_jambu_key_load_odd(ptr) \
    ((tiny_jambu_key_word_t)(~(le_load_word32((ptr)))))
#endif

#if TINY_JAMBU_64BIT
#define tiny_jambu_init_state(state) \
    ((state)->t[0] = (state)->t[1] = 0)
#define tiny_jambu_add_domain(state, domain) \
    ((state)->t[0] ^= ((uint64_t)(domain)) << 32)
#define tiny_jambu_absorb(state, word) \
    ((state)->t[1] ^= ((uint64_t)(word)) << 32)
#define tiny_jambu_squeeze(state) ((uint32_t)((state)->t[1]))
#else
#define tiny_jambu_init_state(state) \
    ((state)->s[0] = (state)->s[1] = (state)->s[2] = (state)->s[3] = 0)
#define tiny_jambu_add_domain(state, domain) \
    ((state)->s[1] ^= (domain))
#define tiny_jambu_absorb(state, word) \
    ((state)->s[3] ^= (word))
#define tiny_jambu_squeeze(state) ((state)->s[2])
#endif

#define TINYJAMBU_ROUNDS(steps) ((steps) / 128)

void tiny_jambu_permutation_128
    (tiny_jambu_state_t *state, const tiny_jambu_key_word_t *key,
     unsigned rounds);

void tiny_jambu_permutation_192
    (tiny_jambu_state_t *state, const tiny_jambu_key_word_t *key,
     unsigned rounds);

void tiny_jambu_permutation_256
    (tiny_jambu_state_t *state, const tiny_jambu_key_word_t *key,
     unsigned rounds);

#ifdef __cplusplus
}
#endif

#endif