mirror of
https://github.com/oliverschmidt/contiki.git
synced 2024-11-07 17:05:09 +00:00
92 lines
3.1 KiB
C
92 lines
3.1 KiB
C
/*
|
|
* Copyright (c) 2016, 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-cbc-mac
|
|
* @{
|
|
*
|
|
* \file
|
|
* Implementation of the cc2538 AES-CBC-MAC driver
|
|
*/
|
|
#include "contiki.h"
|
|
#include "dev/rom-util.h"
|
|
#include "dev/cbc-mac.h"
|
|
|
|
#include <stdbool.h>
|
|
#include <stdint.h>
|
|
/*---------------------------------------------------------------------------*/
|
|
uint8_t
|
|
cbc_mac_auth_start(uint8_t key_area, const void *mdata, uint16_t mdata_len,
|
|
struct process *process)
|
|
{
|
|
uint32_t ctrl;
|
|
uint32_t iv[AES_IV_LEN / sizeof(uint32_t)];
|
|
|
|
/* Program AES-CBC-MAC authentication operation */
|
|
ctrl = AES_AES_CTRL_SAVE_CONTEXT | /* Save context */
|
|
AES_AES_CTRL_CBC_MAC | /* CBC-MAC */
|
|
AES_AES_CTRL_DIRECTION_ENCRYPT; /* Encryption */
|
|
|
|
/* Prepare the crypto initialization vector
|
|
* Set initialization vector to 0 */
|
|
rom_util_memset(iv, 0, AES_IV_LEN);
|
|
|
|
return aes_auth_crypt_start(ctrl, key_area, iv, NULL, 0,
|
|
mdata, NULL, mdata_len, process);
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
uint8_t
|
|
cbc_mac_auth_get_result(const void *mac_in, void *mac_out)
|
|
{
|
|
uint32_t tag[AES_TAG_LEN / sizeof(uint32_t)];
|
|
uint8_t ret;
|
|
|
|
ret = aes_auth_crypt_get_result(NULL, tag);
|
|
if(ret != CRYPTO_SUCCESS) {
|
|
return ret;
|
|
}
|
|
|
|
if(mac_in != NULL) {
|
|
/* Check MAC */
|
|
if(rom_util_memcmp(tag, mac_in, CBC_MAC_MAC_LEN)) {
|
|
ret = AES_AUTHENTICATION_FAILED;
|
|
}
|
|
}
|
|
|
|
if(mac_out != NULL) {
|
|
/* Copy tag to MAC */
|
|
rom_util_memcpy(mac_out, tag, CBC_MAC_MAC_LEN);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
/** @} */
|