140 lines
5.6 KiB
C
140 lines
5.6 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-gcm cc2538 AES-GCM
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*
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* Driver for the cc2538 AES-GCM 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-GCM driver
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*/
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#ifndef GCM_H_
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#define GCM_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-GCM constants
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* @{
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*/
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#define GCM_IV_LEN (96 / 8)
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#define GCM_TAG_LEN AES_TAG_LEN
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/** @} */
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/*---------------------------------------------------------------------------*/
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/** \name AES-GCM functions
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* @{
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*/
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/** \brief Starts a GCM authentication and encryption operation
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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 iv Pointer to 96-bit initialization vector
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* \param adata Pointer to additional authenticated data in SRAM, or \c NULL
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* \param adata_len Length of additional authenticated data in octets, or \c 0
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* \param pdata Pointer to message to authenticate and encrypt in SRAM, or
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* \c NULL
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* \param pdata_len Length of message to authenticate and encrypt in octets, or
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* \c 0
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* \param cdata Pointer to encrypted message in SRAM (may be \p pdata), or
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* \c NULL
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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/GCM error code
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*/
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uint8_t gcm_auth_encrypt_start(uint8_t key_area, const void *iv,
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const void *adata, uint16_t adata_len,
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const void *pdata, uint16_t pdata_len,
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void *cdata, struct process *process);
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/** \brief Checks the status of the GCM authentication and encryption operation
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* \retval false Result not yet available, and no error occurred
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* \retval true Result available, or error occurred
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*/
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#define gcm_auth_encrypt_check_status aes_auth_crypt_check_status
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/** \brief Gets the result of the GCM authentication and encryption operation
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* \param tag Pointer to 128-bit authentication tag, or \c NULL
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* \return \c CRYPTO_SUCCESS if successful, or CRYPTO/AES/GCM error code
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* \note This function must be called only after \c gcm_auth_encrypt_start().
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*/
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uint8_t gcm_auth_encrypt_get_result(void *tag);
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/** \brief Starts a GCM authentication checking and decryption operation
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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 iv Pointer to 96-bit initialization vector
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* \param adata Pointer to additional authenticated data in SRAM, or \c NULL
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* \param adata_len Length of additional authenticated data in octets, or \c 0
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* \param cdata Pointer to encrypted message in SRAM, or \c NULL
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* \param cdata_len Length of encrypted message in octets, or \c 0
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* \param pdata Pointer to decrypted message in SRAM (may be \p cdata), or
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* \c NULL
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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/GCM error code
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*/
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uint8_t gcm_auth_decrypt_start(uint8_t key_area, const void *iv,
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const void *adata, uint16_t adata_len,
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const void *cdata, uint16_t cdata_len,
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void *pdata, struct process *process);
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/** \brief Checks the status of the GCM authentication checking and decryption
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* operation
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* \retval false Result not yet available, and no error occurred
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* \retval true Result available, or error occurred
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*/
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#define gcm_auth_decrypt_check_status aes_auth_crypt_check_status
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/** \brief Gets the result of the GCM authentication checking and decryption
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* operation
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* \param tag_in Pointer to 128-bit input authentication tag, or \c NULL
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* \param tag_out Pointer to 128-bit output authentication tag, or \c NULL
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* \return \c CRYPTO_SUCCESS if successful, or CRYPTO/AES/GCM error code
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* \note This function must be called only after \c gcm_auth_decrypt_start().
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*/
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uint8_t gcm_auth_decrypt_get_result(const void *tag_in, void *tag_out);
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/** @} */
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#endif /* GCM_H_ */
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/**
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* @}
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* @}
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*/
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