Semtech / LoRaWAN-lib

LoRaWAN MAC layer implementation

Dependents:   LoRaWAN-demo-72_tjm LoRaWAN-demo-72_jlc LoRaWAN-demo-elmo frdm_LoRa_Connect_Woodstream_Demo_tjm ... more

LoRAWAN-lib is a port of the GitHub LoRaMac-node LoRaWAN MAC layer implementation.

This library depends on the SX1276Lib or SX1272Lib radio drivers depending on the used mbed component shield.

This library depends also on some cryptographic helper functions as well as helper functions for the timers management. These can be found on the example projects under the system directory.

The example projects are:

  1. LoRaWAN-demo-72
  2. LoRaWAN-demo-76
  3. LoRaWAN-demo-NAMote72

The LoRaWAN specification specifies different ISM bands operating parameters. These are all implemented under the LoRaMac-board.h file.

In order to select which band to use, please change line 24 of board.h file provided on the examples projects as follows:


EU868

board.h

#define USE_BAND_868


US915

board.h

#define USE_BAND_915


US915 - Hybrid

board.h

#define USE_BAND_915_HYBRID


CN780

board.h

#define USE_BAND_780


EU433

board.h

#define USE_BAND_433

LoRaMacCrypto.h

Committer:
ubhat
Date:
2018-07-17
Revision:
11:2426a05fe29e
Parent:
2:14a5d6ad92d5

File content as of revision 11:2426a05fe29e:

/*!
 * \file      LoRaMacCrypto.h
 *
 * \brief     LoRa MAC layer cryptography implementation
 *
 * \copyright Revised BSD License, see section \ref LICENSE.
 *
 * \code
 *                ______                              _
 *               / _____)             _              | |
 *              ( (____  _____ ____ _| |_ _____  ____| |__
 *               \____ \| ___ |    (_   _) ___ |/ ___)  _ \
 *               _____) ) ____| | | || |_| ____( (___| | | |
 *              (______/|_____)_|_|_| \__)_____)\____)_| |_|
 *              (C)2013 Semtech
 *
 *               ___ _____ _   ___ _  _____ ___  ___  ___ ___
 *              / __|_   _/_\ / __| |/ / __/ _ \| _ \/ __| __|
 *              \__ \ | |/ _ \ (__| ' <| _| (_) |   / (__| _|
 *              |___/ |_/_/ \_\___|_|\_\_| \___/|_|_\\___|___|
 *              embedded.connectivity.solutions===============
 *
 * \endcode
 *
 * \author    Miguel Luis ( Semtech )
 *
 * \author    Gregory Cristian ( Semtech )
 *
 * \author    Daniel Jäckle ( STACKFORCE )
 *
 * \defgroup    LORAMAC_CRYPTO  LoRa MAC layer cryptography implementation
 *              This module covers the implementation of cryptographic functions
 *              of the LoRaMAC layer.
 * \{
 */
#ifndef __LORAMAC_CRYPTO_H__
#define __LORAMAC_CRYPTO_H__

/*!
 * Computes the LoRaMAC frame MIC field
 *
 * \param [IN]  buffer          - Data buffer
 * \param [IN]  size            - Data buffer size
 * \param [IN]  key             - AES key to be used
 * \param [IN]  address         - Frame address
 * \param [IN]  dir             - Frame direction [0: uplink, 1: downlink]
 * \param [IN]  sequenceCounter - Frame sequence counter
 * \param [OUT] mic             - Computed MIC field
 */
void LoRaMacComputeMic( const uint8_t *buffer, uint16_t size, const uint8_t *key, uint32_t address, uint8_t dir, uint32_t sequenceCounter, uint32_t *mic );

/*!
 * Computes the LoRaMAC payload encryption
 *
 * \param [IN]  buffer          - Data buffer
 * \param [IN]  size            - Data buffer size
 * \param [IN]  key             - AES key to be used
 * \param [IN]  address         - Frame address
 * \param [IN]  dir             - Frame direction [0: uplink, 1: downlink]
 * \param [IN]  sequenceCounter - Frame sequence counter
 * \param [OUT] encBuffer       - Encrypted buffer
 */
void LoRaMacPayloadEncrypt( const uint8_t *buffer, uint16_t size, const uint8_t *key, uint32_t address, uint8_t dir, uint32_t sequenceCounter, uint8_t *encBuffer );

/*!
 * Computes the LoRaMAC payload decryption
 *
 * \param [IN]  buffer          - Data buffer
 * \param [IN]  size            - Data buffer size
 * \param [IN]  key             - AES key to be used
 * \param [IN]  address         - Frame address
 * \param [IN]  dir             - Frame direction [0: uplink, 1: downlink]
 * \param [IN]  sequenceCounter - Frame sequence counter
 * \param [OUT] decBuffer       - Decrypted buffer
 */
void LoRaMacPayloadDecrypt( const uint8_t *buffer, uint16_t size, const uint8_t *key, uint32_t address, uint8_t dir, uint32_t sequenceCounter, uint8_t *decBuffer );

/*!
 * Computes the LoRaMAC Join Request frame MIC field
 *
 * \param [IN]  buffer          - Data buffer
 * \param [IN]  size            - Data buffer size
 * \param [IN]  key             - AES key to be used
 * \param [OUT] mic             - Computed MIC field
 */
void LoRaMacJoinComputeMic( const uint8_t *buffer, uint16_t size, const uint8_t *key, uint32_t *mic );

/*!
 * Computes the LoRaMAC join frame decryption
 *
 * \param [IN]  buffer          - Data buffer
 * \param [IN]  size            - Data buffer size
 * \param [IN]  key             - AES key to be used
 * \param [OUT] decBuffer       - Decrypted buffer
 */
void LoRaMacJoinDecrypt( const uint8_t *buffer, uint16_t size, const uint8_t *key, uint8_t *decBuffer );

/*!
 * Computes the LoRaMAC join frame decryption
 *
 * \param [IN]  key             - AES key to be used
 * \param [IN]  appNonce        - Application nonce
 * \param [IN]  devNonce        - Device nonce
 * \param [OUT] nwkSKey         - Network session key
 * \param [OUT] appSKey         - Application session key
 */
void LoRaMacJoinComputeSKeys( const uint8_t *key, const uint8_t *appNonce, uint16_t devNonce, uint8_t *nwkSKey, uint8_t *appSKey );

/*! \} defgroup LORAMAC */

#endif // __LORAMAC_CRYPTO_H__