internal-aes.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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 */

#ifndef LW_INTERNAL_AES_H
#define LW_INTERNAL_AES_H

#include "internal-util.h"

#ifdef __cplusplus
extern "C" {
#endif

#define AES_BLOCK_SIZE 16

#define AES128_KEY_SIZE 16

#define AES192_KEY_SIZE 24

#define AES256_KEY_SIZE 32

#define AES_ROUND_KEYS 60

typedef struct
{
    uint32_t k[AES_ROUND_KEYS];

    uint32_t rounds;

} aes_key_schedule_t;

void aes_128_init(aes_key_schedule_t *ks, const unsigned char *key);

void aes_192_init(aes_key_schedule_t *ks, const unsigned char *key);

void aes_256_init(aes_key_schedule_t *ks, const unsigned char *key);

void aes_ecb_encrypt
    (const aes_key_schedule_t *ks, unsigned char *output,
     const unsigned char *input);

#ifdef __cplusplus
}
#endif

#endif