Kenji Arai
/
TYBLE16_mbedlized_os5_several_examples_1st
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Dependencies: nRF51_Vdd TextLCD BME280
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LoRaMacCrypto.h
00001 /** 00002 \code 00003 00004 / _____) _ | | 00005 ( (____ _____ ____ _| |_ _____ ____| |__ 00006 \____ \| ___ | (_ _) ___ |/ ___) _ \ 00007 _____) ) ____| | | || |_| ____( (___| | | | 00008 (______/|_____)_|_|_| \__)_____)\____)_| |_| 00009 (C)2013 Semtech 00010 ___ _____ _ ___ _ _____ ___ ___ ___ ___ 00011 / __|_ _/_\ / __| |/ / __/ _ \| _ \/ __| __| 00012 \__ \ | |/ _ \ (__| ' <| _| (_) | / (__| _| 00013 |___/ |_/_/ \_\___|_|\_\_| \___/|_|_\\___|___| 00014 embedded.connectivity.solutions=============== 00015 00016 \endcode 00017 00018 Description: LoRa MAC Crypto implementation 00019 00020 License: Revised BSD License, see LICENSE.TXT file include in the project 00021 00022 Maintainer: Miguel Luis ( Semtech ), Gregory Cristian ( Semtech ) and Daniel Jaeckle ( STACKFORCE ) 00023 00024 00025 Copyright (c) 2017, Arm Limited and affiliates. 00026 00027 SPDX-License-Identifier: BSD-3-Clause 00028 */ 00029 00030 #ifndef MBED_LORAWAN_MAC_LORAMAC_CRYPTO_H__ 00031 #define MBED_LORAWAN_MAC_LORAMAC_CRYPTO_H__ 00032 00033 #include "mbedtls/aes.h" 00034 #include "mbedtls/cmac.h" 00035 00036 00037 class LoRaMacCrypto 00038 { 00039 public: 00040 /** 00041 * Constructor 00042 */ 00043 LoRaMacCrypto(); 00044 00045 /** 00046 * Computes the LoRaMAC frame MIC field 00047 * 00048 * @param [in] buffer - Data buffer 00049 * @param [in] size - Data buffer size 00050 * @param [in] key - AES key to be used 00051 * @param [in] key_length - Length of the key (bits) 00052 * @param [in] address - Frame address 00053 * @param [in] dir - Frame direction [0: uplink, 1: downlink] 00054 * @param [in] seq_counter - Frame sequence counter 00055 * @param [out] mic - Computed MIC field 00056 * 00057 * @return 0 if successful, or a cipher specific error code 00058 */ 00059 int compute_mic(const uint8_t *buffer, uint16_t size, 00060 const uint8_t *key, uint32_t key_length, 00061 uint32_t address, uint8_t dir, uint32_t seq_counter, 00062 uint32_t *mic); 00063 00064 /** 00065 * Performs payload encryption 00066 * 00067 * @param [in] buffer - Data buffer 00068 * @param [in] size - Data buffer size 00069 * @param [in] key - AES key to be used 00070 * @param [in] key_length - Length of the key (bits) 00071 * @param [in] address - Frame address 00072 * @param [in] dir - Frame direction [0: uplink, 1: downlink] 00073 * @param [in] seq_counter - Frame sequence counter 00074 * @param [out] enc_buffer - Encrypted buffer 00075 * 00076 * @return 0 if successful, or a cipher specific error code 00077 */ 00078 int encrypt_payload(const uint8_t *buffer, uint16_t size, 00079 const uint8_t *key, uint32_t key_length, 00080 uint32_t address, uint8_t dir, uint32_t seq_counter, 00081 uint8_t *enc_buffer); 00082 00083 /** 00084 * Performs payload decryption 00085 * 00086 * @param [in] buffer - Data buffer 00087 * @param [in] size - Data buffer size 00088 * @param [in] key - AES key to be used 00089 * @param [in] key_length - Length of the key (bits) 00090 * @param [in] address - Frame address 00091 * @param [in] dir - Frame direction [0: uplink, 1: downlink] 00092 * @param [in] seq_counter - Frame sequence counter 00093 * @param [out] dec_buffer - Decrypted buffer 00094 * 00095 * @return 0 if successful, or a cipher specific error code 00096 */ 00097 int decrypt_payload(const uint8_t *buffer, uint16_t size, 00098 const uint8_t *key, uint32_t key_length, 00099 uint32_t address, uint8_t dir, uint32_t seq_counter, 00100 uint8_t *dec_buffer); 00101 00102 /** 00103 * Computes the LoRaMAC Join Request frame MIC field 00104 * 00105 * @param [in] buffer - Data buffer 00106 * @param [in] size - Data buffer size 00107 * @param [in] key - AES key to be used 00108 * @param [in] key_length - Length of the key (bits) 00109 * @param [out] mic - Computed MIC field 00110 * 00111 * @return 0 if successful, or a cipher specific error code 00112 * 00113 */ 00114 int compute_join_frame_mic(const uint8_t *buffer, uint16_t size, 00115 const uint8_t *key, uint32_t key_length, 00116 uint32_t *mic); 00117 00118 /** 00119 * Computes the LoRaMAC join frame decryption 00120 * 00121 * @param [in] buffer - Data buffer 00122 * @param [in] size - Data buffer size 00123 * @param [in] key - AES key to be used 00124 * @param [in] key_length - Length of the key (bits) 00125 * @param [out] dec_buffer - Decrypted buffer 00126 * 00127 * @return 0 if successful, or a cipher specific error code 00128 */ 00129 int decrypt_join_frame(const uint8_t *buffer, uint16_t size, 00130 const uint8_t *key, uint32_t key_length, 00131 uint8_t *dec_buffer); 00132 00133 /** 00134 * Computes the LoRaMAC join frame decryption 00135 * 00136 * @param [in] key - AES key to be used 00137 * @param [in] key_length - Length of the key (bits) 00138 * @param [in] app_nonce - Application nonce 00139 * @param [in] dev_nonce - Device nonce 00140 * @param [out] nwk_skey - Network session key 00141 * @param [out] app_skey - Application session key 00142 * 00143 * @return 0 if successful, or a cipher specific error code 00144 */ 00145 int compute_skeys_for_join_frame(const uint8_t *key, uint32_t key_length, 00146 const uint8_t *app_nonce, uint16_t dev_nonce, 00147 uint8_t *nwk_skey, uint8_t *app_skey); 00148 00149 private: 00150 /** 00151 * AES computation context variable 00152 */ 00153 mbedtls_aes_context aes_ctx; 00154 00155 /** 00156 * CMAC computation context variable 00157 */ 00158 mbedtls_cipher_context_t aes_cmac_ctx[1]; 00159 }; 00160 00161 #endif // MBED_LORAWAN_MAC_LORAMAC_CRYPTO_H__
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