140 lines
5.6 KiB
C
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_ */
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @}
|
||
|
|
* @}
|
||
|
|
*/
|