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90 lines
3.3 KiB
C
90 lines
3.3 KiB
C
/*
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* Copyright (c) 2015, Benoît Thébaudeau <benoit.thebaudeau.dev@gmail.com>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the copyright holder nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/**
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* \addtogroup cc2538-aes
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* @{
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*
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* \defgroup cc2538-ctr cc2538 AES-CTR
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*
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* Driver for the cc2538 AES-CTR mode of the security core
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* @{
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*
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* \file
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* Header file for the cc2538 AES-CTR driver
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*/
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#ifndef CTR_H_
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#define CTR_H_
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#include "contiki.h"
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#include "dev/aes.h"
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#include <stdbool.h>
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#include <stdint.h>
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/*---------------------------------------------------------------------------*/
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/** \name AES-CTR functions
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* @{
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*/
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/** \brief Starts a CTR crypto operation
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* \param encrypt \c true to encrypt, or \c false to decrypt
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* \param key_area Area in Key RAM where the key is stored (0 to
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* \c AES_KEY_AREAS - 1)
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* \param nonce Pointer to nonce (\c AES_IV_LEN - \p ctr_len octets), or \c NULL
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* \param ictr Pointer to initial counter
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* \param ctr_len Length of counter in octets (4, 8, 12, or 16)
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* \param mdata_in Pointer to input message in SRAM
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* \param mdata_out Pointer to output message in SRAM (may be \p mdata_in)
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* \param mdata_len Length of message in octets
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* \param process Process to be polled upon completion of the operation, or
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* \c NULL
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* \return \c CRYPTO_SUCCESS if successful, or CRYPTO/AES/CTR error code
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*/
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uint8_t ctr_crypt_start(uint8_t encrypt, uint8_t key_area, const void *nonce,
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const void *ictr, uint8_t ctr_len, const void *mdata_in,
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void *mdata_out, uint16_t mdata_len,
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struct process *process);
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/** \brief Checks the status of the CTR crypto operation
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* \return \c CRYPTO_PENDING if operation still pending, \c CRYPTO_SUCCESS if
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* successful, or CRYPTO/AES/CTR error code
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* \note This function must be called only after \c ctr_crypt_start().
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*/
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int8_t ctr_crypt_check_status(void);
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/** @} */
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#endif /* CTR_H_ */
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/**
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* @}
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* @}
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*/
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