66 lines
3.2 KiB
C
66 lines
3.2 KiB
C
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/*
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LoRaWAN.h - Library header file for LoRaWAN protocol, uses RFM95W module
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Created by Leo Korbee, March 31, 2018.
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Released into the public domain.
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@license Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
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Thanks to all the folks who contributed before me on this code.
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*/
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#include "../RFM95/RFM95.h"
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#include "Arduino.h"
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#ifndef LoRaWAN_h
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#define LoRaWAN_h
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// for AES encryption
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static const unsigned char PROGMEM S_Table[16][16] = {
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{0x63,0x7C,0x77,0x7B,0xF2,0x6B,0x6F,0xC5,0x30,0x01,0x67,0x2B,0xFE,0xD7,0xAB,0x76},
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{0xCA,0x82,0xC9,0x7D,0xFA,0x59,0x47,0xF0,0xAD,0xD4,0xA2,0xAF,0x9C,0xA4,0x72,0xC0},
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{0xB7,0xFD,0x93,0x26,0x36,0x3F,0xF7,0xCC,0x34,0xA5,0xE5,0xF1,0x71,0xD8,0x31,0x15},
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{0x04,0xC7,0x23,0xC3,0x18,0x96,0x05,0x9A,0x07,0x12,0x80,0xE2,0xEB,0x27,0xB2,0x75},
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{0x09,0x83,0x2C,0x1A,0x1B,0x6E,0x5A,0xA0,0x52,0x3B,0xD6,0xB3,0x29,0xE3,0x2F,0x84},
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{0x53,0xD1,0x00,0xED,0x20,0xFC,0xB1,0x5B,0x6A,0xCB,0xBE,0x39,0x4A,0x4C,0x58,0xCF},
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{0xD0,0xEF,0xAA,0xFB,0x43,0x4D,0x33,0x85,0x45,0xF9,0x02,0x7F,0x50,0x3C,0x9F,0xA8},
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{0x51,0xA3,0x40,0x8F,0x92,0x9D,0x38,0xF5,0xBC,0xB6,0xDA,0x21,0x10,0xFF,0xF3,0xD2},
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{0xCD,0x0C,0x13,0xEC,0x5F,0x97,0x44,0x17,0xC4,0xA7,0x7E,0x3D,0x64,0x5D,0x19,0x73},
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{0x60,0x81,0x4F,0xDC,0x22,0x2A,0x90,0x88,0x46,0xEE,0xB8,0x14,0xDE,0x5E,0x0B,0xDB},
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{0xE0,0x32,0x3A,0x0A,0x49,0x06,0x24,0x5C,0xC2,0xD3,0xAC,0x62,0x91,0x95,0xE4,0x79},
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{0xE7,0xC8,0x37,0x6D,0x8D,0xD5,0x4E,0xA9,0x6C,0x56,0xF4,0xEA,0x65,0x7A,0xAE,0x08},
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{0xBA,0x78,0x25,0x2E,0x1C,0xA6,0xB4,0xC6,0xE8,0xDD,0x74,0x1F,0x4B,0xBD,0x8B,0x8A},
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{0x70,0x3E,0xB5,0x66,0x48,0x03,0xF6,0x0E,0x61,0x35,0x57,0xB9,0x86,0xC1,0x1D,0x9E},
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{0xE1,0xF8,0x98,0x11,0x69,0xD9,0x8E,0x94,0x9B,0x1E,0x87,0xE9,0xCE,0x55,0x28,0xDF},
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{0x8C,0xA1,0x89,0x0D,0xBF,0xE6,0x42,0x68,0x41,0x99,0x2D,0x0F,0xB0,0x54,0xBB,0x16}
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};
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class LoRaWAN
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{
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public:
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LoRaWAN(RFM95 &rfm95);
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void setKeys(unsigned char NwkSkey[], unsigned char AppSkey[], unsigned char DevAddr[]);
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void Send_Data(unsigned char *Data, unsigned char Data_Length, unsigned int Frame_Counter_Tx, lora_dr_t datarate,unsigned char Frame_Port);
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private:
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RFM95 *_rfm95;
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// remember arrays are pointers!
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unsigned char *_NwkSkey;
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unsigned char *_AppSkey;
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unsigned char *_DevAddr;
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void RFM_Send_Package(unsigned char *RFM_Tx_Package, unsigned char Package_Length);
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// security stuff:
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void Encrypt_Payload(unsigned char *Data, unsigned char Data_Length, unsigned int Frame_Counter, unsigned char Direction);
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void Calculate_MIC(unsigned char *Data, unsigned char *Final_MIC, unsigned char Data_Length, unsigned int Frame_Counter, unsigned char Direction);
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void Generate_Keys(unsigned char *K1, unsigned char *K2);
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void Shift_Left(unsigned char *Data);
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void XOR(unsigned char *New_Data,unsigned char *Old_Data);
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void AES_Encrypt(unsigned char *Data, unsigned char *Key);
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void AES_Add_Round_Key(unsigned char *Round_Key, unsigned char (*State)[4]);
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unsigned char AES_Sub_Byte(unsigned char Byte);
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void AES_Shift_Rows(unsigned char (*State)[4]);
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void AES_Mix_Collums(unsigned char (*State)[4]);
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void AES_Calculate_Round_Key(unsigned char Round, unsigned char *Round_Key);
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};
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#endif
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