contiki/core/net/llsec/ccm.h
2014-08-05 05:07:05 -07:00

86 lines
2.6 KiB
C

/**
* \addtogroup llsec802154
* @{
*/
/*
* Copyright (c) 2013, Hasso-Plattner-Institut.
* 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 file.
* \author
* Konrad Krentz <konrad.krentz@gmail.com>
*/
#ifndef CCM_H_
#define CCM_H_
#include "contiki.h"
#include "net/mac/frame802154.h"
/* see RFC 3610 */
#define CCM_AUTH_FLAGS(Adata, M) ((Adata ? (1 << 6) : 0) | (((M - 2) >> 1) << 3) | 1)
#define CCM_ENCRYPTION_FLAGS 1
#ifdef CCM_CONF
#define CCM CCM_CONF
#else /* CCM_CONF */
#define CCM ccm_driver
#endif /* CCM_CONF */
/**
* Structure of CCM drivers.
*/
struct ccm_driver {
/**
* \brief Generates a MIC over the frame in the packetbuf.
* \param result The generated MIC will be put here
* \param mic_len <= 16; set to LLSEC802154_MIC_LENGTH to be compliant
*/
void (* mic)(const uint8_t *extended_source_address,
uint8_t *result,
uint8_t mic_len);
/**
* \brief XORs the frame in the packetbuf with the key stream.
*/
void (* ctr)(const uint8_t *extended_source_address);
};
extern const struct ccm_driver CCM;
#endif /* CCM_H_ */
/** @} */