contiki/cpu/cc2538/dev/ctr.h
Benoît Thébaudeau 47c24cab11 cc2538: Add crypto driver and example for AES-CTR
Signed-off-by: Benoît Thébaudeau <benoit.thebaudeau.dev@gmail.com>
2016-01-06 23:22:53 +01:00

90 lines
3.3 KiB
C

/*
* Copyright (c) 2015, Benoît Thébaudeau <benoit.thebaudeau.dev@gmail.com>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
*
* 3. Neither the name of the copyright holder 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 ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/**
* \addtogroup cc2538-aes
* @{
*
* \defgroup cc2538-ctr cc2538 AES-CTR
*
* Driver for the cc2538 AES-CTR mode of the security core
* @{
*
* \file
* Header file for the cc2538 AES-CTR driver
*/
#ifndef CTR_H_
#define CTR_H_
#include "contiki.h"
#include "dev/aes.h"
#include <stdbool.h>
#include <stdint.h>
/*---------------------------------------------------------------------------*/
/** \name AES-CTR functions
* @{
*/
/** \brief Starts a CTR crypto operation
* \param encrypt \c true to encrypt, or \c false to decrypt
* \param key_area Area in Key RAM where the key is stored (0 to
* \c AES_KEY_AREAS - 1)
* \param nonce Pointer to nonce (\c AES_IV_LEN - \p ctr_len octets), or \c NULL
* \param ictr Pointer to initial counter
* \param ctr_len Length of counter in octets (4, 8, 12, or 16)
* \param mdata_in Pointer to input message in SRAM
* \param mdata_out Pointer to output message in SRAM (may be \p mdata_in)
* \param mdata_len Length of message in octets
* \param process Process to be polled upon completion of the operation, or
* \c NULL
* \return \c CRYPTO_SUCCESS if successful, or CRYPTO/AES/CTR error code
*/
uint8_t ctr_crypt_start(uint8_t encrypt, uint8_t key_area, const void *nonce,
const void *ictr, uint8_t ctr_len, const void *mdata_in,
void *mdata_out, uint16_t mdata_len,
struct process *process);
/** \brief Checks the status of the CTR crypto operation
* \return \c CRYPTO_PENDING if operation still pending, \c CRYPTO_SUCCESS if
* successful, or CRYPTO/AES/CTR error code
* \note This function must be called only after \c ctr_crypt_start().
*/
int8_t ctr_crypt_check_status(void);
/** @} */
#endif /* CTR_H_ */
/**
* @}
* @}
*/