mirror of
https://github.com/oliverschmidt/contiki.git
synced 2024-08-17 13:29:10 +00:00
120 lines
3.6 KiB
C
120 lines
3.6 KiB
C
/*
|
|
* Copyright (c) 2015, SICS Swedish ICT.
|
|
* 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 Institute 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 INSTITUTE 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 INSTITUTE 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.
|
|
*
|
|
* This file is part of the Contiki operating system.
|
|
*
|
|
*/
|
|
|
|
/**
|
|
* \file
|
|
* CCM* header implementation exploiting the JN516x
|
|
* cryptographic co-processor
|
|
* \author
|
|
* Simon Duquennoy <simonduq@sics.se>
|
|
*/
|
|
|
|
#include "ccm-star.h"
|
|
#include <AHI_AES.h>
|
|
#include <string.h>
|
|
|
|
static tsReg128 current_key;
|
|
static int current_key_is_new = 1;
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
static void
|
|
aead(const uint8_t *nonce,
|
|
uint8_t *m, uint8_t m_len,
|
|
const uint8_t *a, uint8_t a_len,
|
|
uint8_t *result, uint8_t mic_len,
|
|
int forward)
|
|
{
|
|
tsReg128 nonce_aligned;
|
|
memcpy(&nonce_aligned, nonce, sizeof(nonce_aligned));
|
|
if(forward) {
|
|
bACI_CCMstar(
|
|
¤t_key,
|
|
current_key_is_new,
|
|
XCV_REG_AES_SET_MODE_CCM,
|
|
mic_len,
|
|
a_len,
|
|
m_len,
|
|
&nonce_aligned,
|
|
(uint8_t *)a,
|
|
(uint8_t *)m,
|
|
(uint8_t *)m,
|
|
result,
|
|
NULL
|
|
);
|
|
} else {
|
|
bool_t auth;
|
|
bACI_CCMstar(
|
|
¤t_key,
|
|
current_key_is_new,
|
|
XCV_REG_AES_SET_MODE_CCM_D,
|
|
mic_len,
|
|
a_len,
|
|
m_len,
|
|
&nonce_aligned,
|
|
(uint8_t *)a,
|
|
(uint8_t *)m,
|
|
(uint8_t *)m,
|
|
(uint8_t *)a + a_len + m_len,
|
|
&auth
|
|
);
|
|
/* To comply with the CCM_STAR interface, copy MIC to result in case of success */
|
|
if(result != NULL) {
|
|
if(auth) {
|
|
memcpy(result, a + a_len + m_len, mic_len);
|
|
} else {
|
|
/* Otherwise, corrupt the result */
|
|
memcpy(result, a + a_len + m_len, mic_len);
|
|
result[0]++;
|
|
}
|
|
}
|
|
}
|
|
|
|
current_key_is_new = 0;
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
static void
|
|
set_key(const uint8_t *key)
|
|
{
|
|
if(memcmp(¤t_key, key, sizeof(current_key)) == 0) {
|
|
current_key_is_new = 0;
|
|
} else {
|
|
memcpy(¤t_key, key, sizeof(current_key));
|
|
current_key_is_new = 1;
|
|
}
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
const struct ccm_star_driver ccm_star_driver_jn516x = {
|
|
set_key,
|
|
aead
|
|
};
|
|
/*---------------------------------------------------------------------------*/
|