/***********************************************************************************
* @fn halRfWriteTxBufSecure
*
* @brief Encrypt and authenticate plaintext then fill TX buffer
*
* @param uint8* data - data buffer. This must be allocated by caller.
* uint8 length - number of bytes
* uint8 encrLength - number of bytes to decrypt
* uint8 authLength - number of bytes to reverse authenticate
* uint8 m - integrity code (m=1,2,3 gives lenght of integrity
* field 4,8,16)
*
* @return none
*/
void halRfWriteTxBufSecure(uint8* data, uint8 length, uint8 encrLength, uint8 authLength, uint8 m)
{
uint8 micLength;
// Check range of m
#if 0 // POOH
HAL_ASSERT(m<=4);
#else
if( m > 4 )
{
DEBUG_MSG_ASSERT;
}
#endif
if(m>0) {
micLength = 0x2<<m;
}
else if(m==0) {
micLength=0;
}
// Write packet to work buffer
CC2520_MEMWR(ADDR_TX, length, data);
// skip the length byte and start from the next byte in TXBUF
// Outgoing frame uses nonce_tx
CC2520_CCM(HIGH_PRIORITY,ADDR_KEY/16, encrLength, ADDR_NONCE_TX/16, ADDR_TX+1, 0, authLength, m);
WAIT_DPU_DONE_H();
// copy from work buffer to TX FIFO
CC2520_TXBUFCP(HIGH_PRIORITY, ADDR_TX, length+micLength, NULL);
WAIT_DPU_DONE_H();
}
/***********************************************************************************
* @fn halRfSecurityInit
*
* @brief Security init. Write nonces and key to chip.
*
* @param none
*
* @return none
*/
void halRfSecurityInit(uint8* key, uint8* nonceRx, uint8* nonceTx)
{
// Write key
CC2520_MEMWR(ADDR_KEY,KEY_LENGTH,key);
// Write nonce RX
CC2520_MEMWR(ADDR_NONCE_RX,NONCE_LENGTH,nonceRx);
// Write nonce TX
CC2520_MEMWR(ADDR_NONCE_TX,NONCE_LENGTH,nonceTx);
// Reverse key
CC2520_MEMCPR(HIGH_PRIORITY,KEY_LENGTH,ADDR_KEY,ADDR_KEY);
// Reverse nonces
CC2520_MEMCPR(HIGH_PRIORITY,NONCE_LENGTH,ADDR_NONCE_RX,ADDR_NONCE_RX);
CC2520_MEMCPR(HIGH_PRIORITY,NONCE_LENGTH,ADDR_NONCE_TX,ADDR_NONCE_TX);
}
/***********************************************************************************
* @fn halRfSetExtAddr
*
* @brief Write PAN Id to chip
*
* @param none
*
* @return none
*/
void halRfSetExtAddr(uint8* extAddr)
{
CC2520_MEMWR(CC2520_RAM_EXTADDR, 8, extAddr);
}
