dolphin4-api/EO3100I_API_Documentation/app_security.html

/************************************************************************-

EVA Board:

    EVA320-2/EOP350


Input PIN:

    -


Output PIN:

    SCLKDIO_1

    Indicates the sending of the telegram


Description:

    This example shows how to convert a non secure message into a secure message.

    The secure message will be sent in the air.

    The secure message contains encrypted data, the rolling code and the CMAC.

    The example sends a secure message every second.


Notes:

    The rolling code will be incremented by the sec_convertToSecure function.


-************************************************************************/


#include "EO3100I_API.h"

#include "EO3100I_CFG.h"

#include <string.h>


#define ledTxOn();      io_setDigital(SCLKDIO_1,1);

#define ledTxOff();     io_setDigital(SCLKDIO_1,0);


code uint8 VERSION_APP[] = {0xE0,'V','E','R','S','I','O','N',1,0,1,0,'A','S','E','C','U','R','I','T','Y','S','E','N','D','E','R',0x00,0xE0};


uint8 const u8key[16]       = {0x2b, 0x7e, 0x15, 0x16, 0x28, 0xae, 0xd2, 0xa6, 0xab, 0xf7, 0x15, 0x88, 0x09, 0xcf, 0x4f, 0x3c};

uint8 const u8subkey1[16]   = {0xfb, 0xee, 0xd6, 0x18, 0x35, 0x71, 0x33, 0x66, 0x7c, 0x85, 0xe0, 0x8f, 0x72, 0x36, 0xa8, 0xde};

uint8 const u8subkey2[16]   = {0xf7, 0xdd, 0xac, 0x30, 0x6a, 0xe2, 0x66, 0xcc, 0xf9, 0x0b, 0xc1, 0x1e, 0xe4, 0x6d, 0x51, 0x3b};


uint8 xdata message[RADIO_BUFF_LENGTH2];

uint8 xdata messageSecure[RADIO_BUFF_LENGTH2];


void main()

{


    SECU_TYPE                   secuInfo;

    MESSAGE_TYPE                DataMsg;

    MESSAGE_TYPE                DataMsgSecure;

    TEL_RADIO_TYPE2             rTel2;

    uint32                      u32RLC;


    //Configuration in EO3100I_cfg.h

    mainInit();


    // Initialisation of the non secure message

    DataMsg.u8Data              = &message[0];                  // Assign a buffer to the non secure message

    DataMsg.u8SourceIdLength    = 4;                            // 32-bit Id

    DataMsg.u16MaxLength        = RADIO_BUFF_LENGTH2;           // Buffer length

    DataMsg.u32SourceId         = 0;                            // ASIC ID will be used

    DataMsg.u32DestinationId    = BROADCAST_ID;                 // Message to any receiver

    DataMsg.u8OptLength         = 0;                            // No optional data

    DataMsg.u8Choice            = RADIO_CHOICE_NON_SEC;         // This R-ORG is not included in the secure message DATA bytes

    DataMsg.u16Length           = 4;


    // Whatever DATA to be encrypted

    message[0] =    0x00;

    message[1] =    0x01;

    message[2] =    0x02;

    message[3] =    0x03;


    // Prepare the secure message

    DataMsgSecure.u8Data            = &messageSecure[0];        // Assign message buffer

    DataMsgSecure.u16MaxLength      = RADIO_BUFF_LENGTH2;

    DataMsgSecure.u8SourceIdLength  = 4;                                    // use 32 bit Id for EEP-Data-Message

    DataMsgSecure.u32DestinationId  = BROADCAST_ID;

    DataMsgSecure.u8OptLength       = 0;


    // Prepare the format of the secure message

    secuInfo.u8TeachInInfo          = TEACH_IN_TYPE_NON_SPEC;

    secuInfo.u8SLF                  = 0xB3;                                 // Security layer format byte : | RLC_ALGO (2-bits) | RLC_TX (1-bit) | MAC_ALGO (2-bits) | DATA_ENC (3-bits) |. 0xB3 = 3-byte RLC, sending RLC, 4-byte CMAC, VAES encryption

    secuInfo.u8KeySize              = 16;                                   // Size of the key in bytes.

    u32RLC                          = 0x00000000;                           // Initial rolling code

    memcpy(&secuInfo.u8Key[0]        , &u8key[0]    ,16);                   // Encryption/decryption key.

    memcpy(&secuInfo.u8CMACsubkey1[0], &u8subkey1[0],16);

    memcpy(&secuInfo.u8CMACsubkey2[0], &u8subkey2[0],16);


    // In every new loop the rolling code changes. This produces a change in the encrypted information and CMAC

    while(1)

    {

         // Transform the non-secure message into a secure message. Transformation happens according to the secuInfo.

         // This function increments the RLC as well.

         sec_convertToSecure(&DataMsg, &DataMsgSecure, &secuInfo, &u32RLC);


         // Convert the message into a telegram that can be sent

         misc_messageToRadio2(&DataMsgSecure, &rTel2, NULL);


        // Switch on the LED to indicate sending

        ledTxOn();

        // Send the secure telegram

        while (radio_sendTelegram2(&rTel2, NULL) ==  BUFF_FULL)

        ledTxOff();


        // 1 second pause

        time_wait(1000);


    }


}