128 lines
5 KiB
C
128 lines
5 KiB
C
|
/*
|
||
|
|
* Copyright (c) 2014, 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.
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef __TSCH_SECURITY_H__
|
||
|
|
#define __TSCH_SECURITY_H__
|
||
|
|
|
||
|
|
/********** Includes **********/
|
||
|
|
|
||
|
|
#include "contiki.h"
|
||
|
|
#include "net/mac/tsch/tsch-asn.h"
|
||
|
|
#include "net/mac/tsch/tsch-private.h"
|
||
|
|
#include "net/mac/frame802154.h"
|
||
|
|
#include "net/mac/frame802154e-ie.h"
|
||
|
|
|
||
|
|
/******** Configuration *******/
|
||
|
|
|
||
|
|
/* To enable TSCH security:
|
||
|
|
* - set LLSEC802154_CONF_SECURITY_LEVEL
|
||
|
|
* - set LLSEC802154_CONF_USES_EXPLICIT_KEYS
|
||
|
|
* - unset LLSEC802154_CONF_USES_FRAME_COUNTER
|
||
|
|
* */
|
||
|
|
#define TSCH_SECURITY_ENABLED (LLSEC802154_CONF_SECURITY_LEVEL != 0)
|
||
|
|
#if TSCH_SECURITY_ENABLED && !LLSEC802154_CONF_USES_EXPLICIT_KEYS
|
||
|
|
#error TSCH_SECURITY_ENABLED set but LLSEC802154_CONF_USES_EXPLICIT_KEYS unset
|
||
|
|
#endif /* TSCH_SECURITY_ENABLED */
|
||
|
|
#if TSCH_SECURITY_ENABLED && LLSEC802154_CONF_USES_FRAME_COUNTER
|
||
|
|
#error TSCH_SECURITY_ENABLED set but LLSEC802154_CONF_USES_FRAME_COUNTER set
|
||
|
|
#endif /* TSCH_SECURITY_ENABLED */
|
||
|
|
|
||
|
|
/* K1, defined in 6TiSCH minimal, is well-known (offers no security) and used for EBs only */
|
||
|
|
#ifdef TSCH_SECURITY_CONF_K1
|
||
|
|
#define TSCH_SECURITY_K1 TSCH_SECURITY_CONF_K1
|
||
|
|
#else /* TSCH_SECURITY_CONF_K1 */
|
||
|
|
#define TSCH_SECURITY_K1 { 0x36, 0x54, 0x69, 0x53, 0x43, 0x48, 0x20, 0x6D, 0x69, 0x6E, 0x69, 0x6D, 0x61, 0x6C, 0x31, 0x35 }
|
||
|
|
#endif /* TSCH_SECURITY_CONF_K1 */
|
||
|
|
|
||
|
|
/* K2, defined in 6TiSCH minimal, is used for all but EB traffic */
|
||
|
|
#ifdef TSCH_SECURITY_CONF_K2
|
||
|
|
#define TSCH_SECURITY_K2 TSCH_SECURITY_CONF_K2
|
||
|
|
#else /* TSCH_SECURITY_CONF_K2 */
|
||
|
|
#define TSCH_SECURITY_K2 { 0xde, 0xad, 0xbe, 0xef, 0xfa, 0xce, 0xca, 0xfe, 0xde, 0xad, 0xbe, 0xef, 0xfa, 0xce, 0xca, 0xfe }
|
||
|
|
#endif /* TSCH_SECURITY_CONF_K2 */
|
||
|
|
|
||
|
|
/* Key used for EBs */
|
||
|
|
#ifdef TSCH_SECURITY_CONF_KEY_INDEX_EB
|
||
|
|
#define TSCH_SECURITY_KEY_INDEX_EB TSCH_SECURITY_CONF_KEY_INDEX_EB
|
||
|
|
#else
|
||
|
|
#define TSCH_SECURITY_KEY_INDEX_EB 1 /* Use K1 as per 6TiSCH minimal */
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/* Security level for EBs */
|
||
|
|
#ifdef TSCH_SECURITY_CONF_SEC_LEVEL_EB
|
||
|
|
#define TSCH_SECURITY_KEY_SEC_LEVEL_EB TSCH_SECURITY_CONF_SEC_LEVEL_EB
|
||
|
|
#else
|
||
|
|
#define TSCH_SECURITY_KEY_SEC_LEVEL_EB 1 /* MIC-32, as per 6TiSCH minimal */
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/* Key used for ACK */
|
||
|
|
#ifdef TSCH_SECURITY_CONF_KEY_INDEX_ACK
|
||
|
|
#define TSCH_SECURITY_KEY_INDEX_ACK TSCH_SECURITY_CONF_KEY_INDEX_ACK
|
||
|
|
#else
|
||
|
|
#define TSCH_SECURITY_KEY_INDEX_ACK 2 /* Use K2 as per 6TiSCH minimal */
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/* Security level for ACKs */
|
||
|
|
#ifdef TSCH_SECURITY_CONF_SEC_LEVEL_ACK
|
||
|
|
#define TSCH_SECURITY_KEY_SEC_LEVEL_ACK TSCH_SECURITY_CONF_SEC_LEVEL_ACK
|
||
|
|
#else
|
||
|
|
#define TSCH_SECURITY_KEY_SEC_LEVEL_ACK 5 /* Encryption + MIC-32, as per 6TiSCH minimal */
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/* Key used for Other (Data, Cmd) */
|
||
|
|
#ifdef TSCH_SECURITY_CONF_KEY_INDEX_OTHER
|
||
|
|
#define TSCH_SECURITY_KEY_INDEX_OTHER TSCH_SECURITY_CONF_KEY_INDEX_OTHER
|
||
|
|
#else
|
||
|
|
#define TSCH_SECURITY_KEY_INDEX_OTHER 2 /* Use K2 as per 6TiSCH minimal */
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/* Security level for Other (Data, Cmd) */
|
||
|
|
#ifdef TSCH_SECURITY_CONF_SEC_LEVEL_OTHER
|
||
|
|
#define TSCH_SECURITY_KEY_SEC_LEVEL_OTHER TSCH_SECURITY_CONF_SEC_LEVEL_OTHER
|
||
|
|
#else
|
||
|
|
#define TSCH_SECURITY_KEY_SEC_LEVEL_OTHER 5 /* Encryption + MIC-32, as per 6TiSCH minimal */
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/************ Types ***********/
|
||
|
|
|
||
|
|
typedef uint8_t aes_key[16];
|
||
|
|
|
||
|
|
/********** Functions *********/
|
||
|
|
|
||
|
|
int tsch_security_mic_len(const frame802154_t *frame);
|
||
|
|
int tsch_security_secure_frame(uint8_t *hdr, uint8_t *outbuf,
|
||
|
|
int hdrlen, int datalen, struct asn_t *asn);
|
||
|
|
int tsch_security_parse_frame(const uint8_t *hdr, int hdrlen, int datalen,
|
||
|
|
const frame802154_t *frame, const linkaddr_t *sender, struct asn_t *asn);
|
||
|
|
|
||
|
|
#endif /* __TSCH_SECURITY_H__ */
|