goranst
Joined: 13 Mar 2011
Posts: 4
Location: Skopje, Macedonia
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| MRF24J40MA Security issue |
 Posted: Tue Feb 28, 2012 5:35 pm |
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Hi all.
I am working on a universal home automation board base on pic 18f14k50 and MRF24J40MA. The communication works like a charm, I have no problems.
Anyway, when I try to encrypt the messages, It simply does not work.
I follow the MRF24J40MA data sheet and implement all the necessary steps. This is my TX_normal routine:
| Code: | void write_TX_normal_FIFO(void){
int i = 0;
int8 temp;
data_TX_normal_FIFO[0] = HEADER_LENGHT;
data_TX_normal_FIFO[1] = HEADER_LENGHT + DATA_LENGHT;
data_TX_normal_FIFO[2] = 0x01; // control frame
data_TX_normal_FIFO[3] = 0x88;
//data_TX_normal_FIFO[4] = SEQ_NUMBER; // sequence number
data_TX_normal_FIFO[5] = PAN_ID_2[1]; // destinatoin pan
data_TX_normal_FIFO[6] = PAN_ID_2[0];
data_TX_normal_FIFO[7] = ADDRESS_short_2[0]; // destination address
data_TX_normal_FIFO[8] = ADDRESS_short_2[1];
data_TX_normal_FIFO[9] = PAN_ID_1[0]; // source pan
data_TX_normal_FIFO[10] = PAN_ID_1[1];
data_TX_normal_FIFO[11] = ADDRESS_short_1[0]; // source address
data_TX_normal_FIFO[12] = ADDRESS_short_1[1];
data_TX_normal_FIFO[13] = DATA_TX[0]; // data
data_TX_normal_FIFO[14] = DATA_TX[1];
data_TX_normal_FIFO[15] = DATA_TX[2];
data_TX_normal_FIFO[16] = DATA_TX[3];
data_TX_normal_FIFO[17] = DATA_TX[4];
data_TX_normal_FIFO[18] = DATA_TX[5];
data_TX_normal_FIFO[19] = DATA_TX[6];
data_TX_normal_FIFO[20] = DATA_TX[7];
for(i = 0; i < (HEADER_LENGHT + DATA_LENGHT + 2); i++)
{
write_ZIGBEE_long(address_TX_normal_FIFO + i, data_TX_normal_FIFO[i]); // write frame into normal FIFO
}
//2.
for(i = 0; i < 13; i++)
{
write_ZIGBEE_long(UPNONCE0+i, NONCEkey[i]); // write NONCE security key normal FIFO
}
//3.
for(i = 0; i < 16; i++)
{
write_ZIGBEE_long(SECKTXNFIFO + i, key[i]); // write security key normal FIFO
}
//3.
temp = read_ZIGBEE_short(SECCON0);
temp = temp | 0x05;
temp = temp & 0xFD;
write_ZIGBEE_short(SECCON0, temp); // write Security Suite (AES-CBC-MAC-128)
//4.
write_ZIGBEE_short(SECCR2, read_ZIGBEE_short(SECCR2)|0x40);
//5.
temp = read_ZIGBEE_short(TXNCON);
temp = temp | 0x02; // mask for set encrypt
write_ZIGBEE_short(TXNCON, temp);
//6.
temp = read_ZIGBEE_short(TXNCON);
temp = temp | 0x01; // mask for start transmit
write_ZIGBEE_short(TXNCON, temp);
} |
Did someone had similar problems? has someone developed a encryption routine that is tested and works?
Thanks for the help in advance
_________________
Goran Stojanovski
www.atronika.com |
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