tc_aes.h

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/* aes.h - TinyCrypt interface to an AES-128 implementation */

/*
 *  Copyright (C) 2017 by Intel Corporation, All Rights Reserved.
 *
 *  Redistribution and use in source and binary forms, with or without
 *  modification, are permitted provided that the following conditions are met:
 *
 *    - Redistributions of source code must retain the above copyright notice,
 *     this list of conditions and the following disclaimer.
 *
 *    - Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 *    - Neither the name of Intel Corporation nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 *  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 *  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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 */

#ifndef __TC_AES_H__
#define __TC_AES_H__

#include <stdint.h>

#ifdef __cplusplus
extern "C" {
#endif

#define Nb (4)  /* number of columns (32-bit words) comprising the state */
#define Nk (4)  /* number of 32-bit words comprising the key */
#define Nr (10) /* number of rounds */
#define TC_AES_BLOCK_SIZE (Nb*Nk)
#define TC_AES_KEY_SIZE (Nb*Nk)

typedef struct tc_aes_key_sched_struct {
  unsigned int words[Nb*(Nr+1)];
} *TCAesKeySched_t;

int tc_aes128_set_encrypt_key(TCAesKeySched_t s, const uint8_t *k);

int tc_aes_encrypt(uint8_t *out, const uint8_t *in, 
       const TCAesKeySched_t s);

int tc_aes128_set_decrypt_key(TCAesKeySched_t s, const uint8_t *k);

int tc_aes_decrypt(uint8_t *out, const uint8_t *in, 
       const TCAesKeySched_t s);

#ifdef __cplusplus
}
#endif

#endif /* __TC_AES_H__ */