nes-proj/cpu/cc2538/dev/gcm.h
Benoît Thébaudeau ccceb63e88 cc2538: Add crypto driver and example for AES-GCM
Signed-off-by: Benoît Thébaudeau <benoit.thebaudeau.dev@gmail.com>
2016-01-06 23:22:54 +01:00

140 lines
5.6 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-gcm cc2538 AES-GCM
*
* Driver for the cc2538 AES-GCM mode of the security core
* @{
*
* \file
* Header file for the cc2538 AES-GCM driver
*/
#ifndef GCM_H_
#define GCM_H_
#include "contiki.h"
#include "dev/aes.h"
#include <stdbool.h>
#include <stdint.h>
/*---------------------------------------------------------------------------*/
/** \name AES-GCM constants
* @{
*/
#define GCM_IV_LEN (96 / 8)
#define GCM_TAG_LEN AES_TAG_LEN
/** @} */
/*---------------------------------------------------------------------------*/
/** \name AES-GCM functions
* @{
*/
/** \brief Starts a GCM authentication and encryption operation
* \param key_area Area in Key RAM where the key is stored (0 to
* \c AES_KEY_AREAS - 1)
* \param iv Pointer to 96-bit initialization vector
* \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 process Process to be polled upon completion of the operation, or
* \c NULL
* \return \c CRYPTO_SUCCESS if successful, or CRYPTO/AES/GCM error code
*/
uint8_t gcm_auth_encrypt_start(uint8_t key_area, const void *iv,
const void *adata, uint16_t adata_len,
const void *pdata, uint16_t pdata_len,
void *cdata, struct process *process);
/** \brief Checks the status of the GCM authentication and encryption operation
* \retval false Result not yet available, and no error occurred
* \retval true Result available, or error occurred
*/
#define gcm_auth_encrypt_check_status aes_auth_crypt_check_status
/** \brief Gets the result of the GCM authentication and encryption operation
* \param tag Pointer to 128-bit authentication tag, or \c NULL
* \return \c CRYPTO_SUCCESS if successful, or CRYPTO/AES/GCM error code
* \note This function must be called only after \c gcm_auth_encrypt_start().
*/
uint8_t gcm_auth_encrypt_get_result(void *tag);
/** \brief Starts a GCM authentication checking and decryption operation
* \param key_area Area in Key RAM where the key is stored (0 to
* \c AES_KEY_AREAS - 1)
* \param iv Pointer to 96-bit initialization vector
* \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 message in SRAM, or \c NULL
* \param cdata_len Length of encrypted message in octets, or \c 0
* \param pdata Pointer to decrypted message in SRAM (may be \p cdata), or
* \c NULL
* \param process Process to be polled upon completion of the operation, or
* \c NULL
* \return \c CRYPTO_SUCCESS if successful, or CRYPTO/AES/GCM error code
*/
uint8_t gcm_auth_decrypt_start(uint8_t key_area, const void *iv,
const void *adata, uint16_t adata_len,
const void *cdata, uint16_t cdata_len,
void *pdata, struct process *process);
/** \brief Checks the status of the GCM authentication checking and decryption
* operation
* \retval false Result not yet available, and no error occurred
* \retval true Result available, or error occurred
*/
#define gcm_auth_decrypt_check_status aes_auth_crypt_check_status
/** \brief Gets the result of the GCM authentication checking and decryption
* operation
* \param tag_in Pointer to 128-bit input authentication tag, or \c NULL
* \param tag_out Pointer to 128-bit output authentication tag, or \c NULL
* \return \c CRYPTO_SUCCESS if successful, or CRYPTO/AES/GCM error code
* \note This function must be called only after \c gcm_auth_decrypt_start().
*/
uint8_t gcm_auth_decrypt_get_result(const void *tag_in, void *tag_out);
/** @} */
#endif /* GCM_H_ */
/**
* @}
* @}
*/