In my case I have to deal with 3 different parties. TinyECC(nesc), native c and contiki. What I am doing is convert nesc in to c then use it in contiki. And I don't have much knowledge in c. . I can't even found it's a segmentation fault or what in contiki. ( they call contiki as embeded os and we don't need to install it, only download package and go in to it and run simulator using 'ant run'). So I extract some codes out and create above source file to get the error.( I don't know way to debug in cooja simulator in contiki) .
But with your help I ported most of codes and correct errors. And I need to check my code is doing right things,,,if you don't mind please look at this code and give me idea how to compare two unsigned integers
Code:
static void bacast_signed_message()
{
uint8_t *M = malloc(MAX_M_LEN*sizeof(uint8_t));//uint8_t M[MAX_M_LEN];//uint8_t *M;
int M_len = MAX_M_LEN;;
uint8_t *C = malloc((2*KEYDIGITS*NN_DIGIT_LEN + 1 + MAX_M_LEN + HMAC_LEN)*sizeof(uint8_t));
int C_len;
//uint8_t C[2*KEYDIGITS*NN_DIGIT_LEN + 1 + MAX_M_LEN + HMAC_LEN];
uint8_t *dM = malloc(MAX_M_LEN*sizeof(uint8_t)); //uint8_t dM[MAX_M_LEN];
int dM_len = MAX_M_LEN;
random_data(M, MAX_M_LEN);
printf("C before encrypt %p\n",*C);
printf("M before encrypt %p\n",*M);
printf("dM before encrypt %p\n",*dM);
C_len = encrypt(C, (2*KEYDIGITS*NN_DIGIT_LEN + 1 + M_len + HMAC_LEN), M, M_len, &pbkey_alice);
//encrypt(uint8_t *C, int C_len, uint8_t *M, int M_len, Point *PublicKey);
printf("C after encrypt %p\n",*C);
printf("M after encrypt %p\n",*M);
printf("dM after encrypt %p\n",*dM);
dM_len = decrypt(dM, dM_len, C, C_len, prKey_alice);
//decrypt(uint8_t *M, int M_len, uint8_t *C, int C_len, NN_DIGIT *d);
printf("C after decrypt %p\n",*C);
printf("M after decrypt %p\n",*M);
printf("dM after decrypt %p\n",*dM);
printf("C_len = %i , M_len = %i\n",C_len,M_len);
if (dM == M){printf("Works\n");}
else{printf("Not Works\n");}
}
and this is the out put I got
Code:
C before encrypt 0x40
M before encrypt 0x28
dM before encrypt 0x70
C after encrypt 0x4
M after encrypt 0x28
dM after encrypt 0x70
C after decrypt 0x4
M after decrypt 0x28
dM after decrypt 0x28
C_len = 102 , M_len = 41
Not Works
And if I changed private_key(no change of public key) then It looks like this
Code:
C before encrypt 0x40
M before encrypt 0x28
dM before encrypt 0x70
C after encrypt 0x4
M after encrypt 0x28
dM after encrypt 0x70
C after decrypt 0x4
M after decrypt 0x28
dM after decrypt 0x70
C_len = 102 , M_len = 41
Not Works
That mean dM has not changed no. But I am not sure about this. If I use %u instead of %p it will give me totally different answers (it says if we use %u it'll convert to decimal. Please give me some advice, and tell me wrong whats with.
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. I can't even found it's a segmentation fault or what in contiki. ( they call contiki as embeded os and we don't need to install it, only download package and go in to it and run simulator using 'ant run'). So I extract some codes out and create above source file to get the error.( I don't know way to debug in cooja simulator in contiki) .