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cc2538: Add AES-CCM* driver

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Signed-off-by: Benoît Thébaudeau <benoit.thebaudeau.dev@gmail.com>
This commit is contained in:
Benoît Thébaudeau 2015-12-26 00:42:39 +01:00
parent 24cb05059a
commit 69eacbddbe
6 changed files with 196 additions and 3 deletions
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2
cpu/cc2538/Makefile.cc2538
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@ -54,7 +54,7 @@ CONTIKI_CPU_DIRS += ../cc253x/usb/common ../cc253x/usb/common/cdc-acm
CONTIKI_CPU_SOURCEFILES += clock.c rtimer-arch.c uart.c watchdog.c
CONTIKI_CPU_SOURCEFILES += nvic.c cpu.c sys-ctrl.c gpio.c ioc.c spi.c adc.c
CONTIKI_CPU_SOURCEFILES += crypto.c aes.c ecb.c ccm.c sha256.c
CONTIKI_CPU_SOURCEFILES += cc2538-aes-128.c
CONTIKI_CPU_SOURCEFILES += cc2538-aes-128.c cc2538-ccm-star.c
CONTIKI_CPU_SOURCEFILES += cc2538-rf.c udma.c lpm.c
CONTIKI_CPU_SOURCEFILES += pka.c bignum-driver.c ecc-driver.c ecc-algorithm.c
CONTIKI_CPU_SOURCEFILES += ecc-curve.c

130
cpu/cc2538/dev/cc2538-ccm-star.c Normal file
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@ -0,0 +1,130 @@
/*
* 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-ccm-star
* @{
*
* \file
* Implementation of the AES-CCM* driver for the CC2538 SoC
*/
#include "contiki.h"
#include "dev/ccm.h"
#include "dev/cc2538-aes-128.h"
#include "dev/cc2538-ccm-star.h"
#include <stdint.h>
#include <stdio.h>
/*---------------------------------------------------------------------------*/
#define MODULE_NAME "cc2538-ccm-star"
#define CCM_STAR_LEN_LEN (CCM_NONCE_LEN_LEN - CCM_STAR_NONCE_LENGTH)
#define DEBUG 0
#if DEBUG
#define PRINTF(...) printf(__VA_ARGS__)
#else
#define PRINTF(...)
#endif
/*---------------------------------------------------------------------------*/
static uint8_t
enable_crypto(void)
{
uint8_t enabled = CRYPTO_IS_ENABLED();
if(!enabled) {
crypto_enable();
}
return enabled;
}
/*---------------------------------------------------------------------------*/
static void
restore_crypto(uint8_t enabled)
{
if(!enabled) {
crypto_disable();
}
}
/*---------------------------------------------------------------------------*/
static void
set_key(const uint8_t *key)
{
cc2538_aes_128_driver.set_key(key);
}
/*---------------------------------------------------------------------------*/
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)
{
uint16_t cdata_len;
uint8_t crypto_enabled, ret;
crypto_enabled = enable_crypto();
if(forward) {
ret = ccm_auth_encrypt_start(CCM_STAR_LEN_LEN, CC2538_AES_128_KEY_AREA,
nonce, a, a_len, m, m_len, m, mic_len, NULL);
if(ret != CRYPTO_SUCCESS) {
PRINTF("%s: ccm_auth_encrypt_start() error %u\n", MODULE_NAME, ret);
restore_crypto(crypto_enabled);
return;
}
while(!ccm_auth_encrypt_check_status());
ret = ccm_auth_encrypt_get_result(result, mic_len);
if(ret != CRYPTO_SUCCESS) {
PRINTF("%s: ccm_auth_encrypt_get_result() error %u\n", MODULE_NAME, ret);
}
} else {
cdata_len = m_len + mic_len;
ret = ccm_auth_decrypt_start(CCM_STAR_LEN_LEN, CC2538_AES_128_KEY_AREA,
nonce, a, a_len, m, cdata_len, m, mic_len,
NULL);
if(ret != CRYPTO_SUCCESS) {
PRINTF("%s: ccm_auth_decrypt_start() error %u\n", MODULE_NAME, ret);
restore_crypto(crypto_enabled);
return;
}
while(!ccm_auth_decrypt_check_status());
ret = ccm_auth_decrypt_get_result(m, cdata_len, result, mic_len);
if(ret != CRYPTO_SUCCESS) {
PRINTF("%s: ccm_auth_decrypt_get_result() error %u\n", MODULE_NAME, ret);
}
}
restore_crypto(crypto_enabled);
}
/*---------------------------------------------------------------------------*/
const struct ccm_star_driver cc2538_ccm_star_driver = {
set_key,
aead
};
/** @} */

55
cpu/cc2538/dev/cc2538-ccm-star.h Normal file
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@ -0,0 +1,55 @@
/*
* 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-ccm-star CC2538 AES-CCM*
*
* AES-CCM* driver for the CC2538 SoC
* @{
*
* \file
* Header file of the AES-CCM* driver for the CC2538 SoC
*/
#ifndef CC2538_CCM_STAR_H_
#define CC2538_CCM_STAR_H_
#include "lib/ccm-star.h"
/*---------------------------------------------------------------------------*/
extern const struct ccm_star_driver cc2538_ccm_star_driver;
#endif /* CC2538_CCM_STAR_H_ */
/**
* @}
* @}
*/

4
cpu/cc2538/dev/ccm.c
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@ -96,14 +96,14 @@ ccm_auth_crypt_get_result(const void *cdata, uint16_t cdata_len,
/* Check MIC */
data_len = cdata_len - mic_len;
if(rom_util_memcmp(tag, &((const uint8_t *)cdata)[data_len], mic_len)) {
return AES_AUTHENTICATION_FAILED;
ret = AES_AUTHENTICATION_FAILED;
}
}
/* Copy tag to MIC */
rom_util_memcpy(mic, tag, mic_len);
return CRYPTO_SUCCESS;
return ret;
}
/*---------------------------------------------------------------------------*/
uint8_t

4
platform/cc2538dk/contiki-conf.h
View File

@ -512,6 +512,10 @@ typedef uint32_t rtimer_clock_t;
#ifndef AES_128_CONF
#define AES_128_CONF cc2538_aes_128_driver /**< AES-128 driver */
#endif
#ifndef CCM_STAR_CONF
#define CCM_STAR_CONF cc2538_ccm_star_driver /**< AES-CCM* driver */
#endif
/** @} */
/*---------------------------------------------------------------------------*/

4
platform/zoul/contiki-conf.h
View File

@ -580,6 +580,10 @@ typedef uint32_t rtimer_clock_t;
#ifndef AES_128_CONF
#define AES_128_CONF cc2538_aes_128_driver /**< AES-128 driver */
#endif
#ifndef CCM_STAR_CONF
#define CCM_STAR_CONF cc2538_ccm_star_driver /**< AES-CCM* driver */
#endif
/** @} */
/*---------------------------------------------------------------------------*/