osd-contiki/cpu/cc2538/dev/ccm.h
Benoît Thébaudeau 04890b1899 cc2538: ccm: Allow separate input/output buffers
This is supported by the hardware, so give access to this feature in the
API.

Signed-off-by: Benoît Thébaudeau <benoit.thebaudeau.dev@gmail.com>
2016-01-04 00:28:26 +01:00

160 lines
6.7 KiB
C

/*
* Original file:
* Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com/
* All rights reserved.
*
* Port to Contiki:
* Copyright (c) 2013, ADVANSEE - http://www.advansee.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-ccm cc2538 AES-CCM
*
* Driver for the cc2538 AES-CCM mode of the security core
* @{
*
* \file
* Header file for the cc2538 AES-CCM driver
*/
#ifndef CCM_H_
#define CCM_H_
#include "contiki.h"
#include "dev/aes.h"
#include <stdbool.h>
#include <stdint.h>
/*---------------------------------------------------------------------------*/
/** \name CCM constants
* @{
*/
#define CCM_FLAGS_LEN 1
#define CCM_NONCE_LEN_LEN (AES_IV_LEN - CCM_FLAGS_LEN)
#define CCM_MIC_MAX_LEN AES_TAG_LEN
/** @} */
/*---------------------------------------------------------------------------*/
/** \name AES-CCM functions
* @{
*/
/** \brief Starts a CCM authentication and encryption operation
* \param len_len Number of octets in length field (2, 4, or 8)
* \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 CCM_NONCE_LEN_LEN - \p len_len octets)
* \param adata Pointer to additional authenticated data in SRAM, or \c NULL
* \param adata_len Length of additional authenticated data in octets, or \c 0
* \param pdata Pointer to message to authenticate and encrypt in SRAM, or
* \c NULL
* \param pdata_len Length of message to authenticate and encrypt in octets, or
* \c 0
* \param cdata Pointer to encrypted message in SRAM (may be \p pdata), or
* \c NULL
* \param mic_len Number of octets in authentication field (even value between 0
* and \c CCM_MIC_MAX_LEN)
* \param process Process to be polled upon completion of the operation, or
* \c NULL
* \return \c CRYPTO_SUCCESS if successful, or CRYPTO/AES/CCM error code
*/
uint8_t ccm_auth_encrypt_start(uint8_t len_len, uint8_t key_area,
const void *nonce, const void *adata,
uint16_t adata_len, const void *pdata,
uint16_t pdata_len, void *cdata, uint8_t mic_len,
struct process *process);
/** \brief Checks the status of the CCM authentication and encryption operation
* \retval false Result not yet available, and no error occurred
* \retval true Result available, or error occurred
*/
#define ccm_auth_encrypt_check_status aes_auth_crypt_check_status
/** \brief Gets the result of the CCM authentication and encryption operation
* \param mic Pointer to authentication field, or \c NULL
* \param mic_len Number of octets in authentication field (even value between 0
* and \c CCM_MIC_MAX_LEN)
* \return \c CRYPTO_SUCCESS if successful, or CRYPTO/AES/CCM error code
* \note This function must be called only after \c ccm_auth_encrypt_start().
*/
uint8_t ccm_auth_encrypt_get_result(void *mic, uint8_t mic_len);
/** \brief Starts a CCM authentication checking and decryption operation
* \param len_len Number of octets in length field (2, 4, or 8)
* \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 CCM_NONCE_LEN_LEN - \p len_len octets)
* \param adata Pointer to additional authenticated data in SRAM, or \c NULL
* \param adata_len Length of additional authenticated data in octets, or \c 0
* \param cdata Pointer to encrypted and authenticated message in SRAM
* \param cdata_len Length of encrypted and authenticated message in octets
* \param pdata Pointer to decrypted message in SRAM (may be \p cdata), or
* \c NULL
* \param mic_len Number of octets in authentication field (even value between 0
* and \c CCM_MIC_MAX_LEN)
* \param process Process to be polled upon completion of the operation, or
* \c NULL
* \return \c CRYPTO_SUCCESS if successful, or CRYPTO/AES/CCM error code
*/
uint8_t ccm_auth_decrypt_start(uint8_t len_len, uint8_t key_area,
const void *nonce, const void *adata,
uint16_t adata_len, const void *cdata,
uint16_t cdata_len, void *pdata, uint8_t mic_len,
struct process *process);
/** \brief Checks the status of the CCM authentication checking and decryption
* operation
* \retval false Result not yet available, and no error occurred
* \retval true Result available, or error occurred
*/
#define ccm_auth_decrypt_check_status aes_auth_crypt_check_status
/** \brief Gets the result of the CCM authentication checking and decryption
* operation
* \param cdata Pointer to encrypted and authenticated message
* \param cdata_len Length of encrypted and authenticated message in octets
* \param mic Pointer to authentication field, or \c NULL
* \param mic_len Number of octets in authentication field (even value between 0
* and \c CCM_MIC_MAX_LEN)
* \return \c CRYPTO_SUCCESS if successful, or CRYPTO/AES/CCM error code
* \note This function must be called only after \c ccm_auth_decrypt_start().
*/
uint8_t ccm_auth_decrypt_get_result(const void *cdata, uint16_t cdata_len,
void *mic, uint8_t mic_len);
/** @} */
#endif /* CCM_H_ */
/**
* @}
* @}
*/