void CRC_Code::set_code(const std::string &code)
{
bvec poly;
for (int i = 0; i < 18;i++) {
if (crccode[i][0] == code)
poly = bvec(crccode[i][1]);
}
if ((code == "WCDMA-8") || (code == "WCDMA-12") || (code == "WCDMA-16") || (code == "WCDMA-24")) {
reverse_parity = true;
}
it_assert(poly.size() > 0, "This CRC code doesn't exist in the tables");
set_generator(poly);
}
static int check_prime(ENGINE *engine, struct prime *pr)
{
DH *dh1, *dh2;
BIGNUM *p, *g;
unsigned char *sec1, *sec2;
size_t size;
int ret;
if (verbose)
printf("Testing %s\n", pr->name);
p = BN_new();
g = BN_new();
dh1 = DH_new_method(engine);
dh2 = DH_new_method(engine);
/* 1. set shared parameter */
set_prime(p, pr->value);
set_generator(g);
dh1->p = BN_dup(p);
dh1->g = BN_dup(g);
dh2->p = BN_dup(p);
dh2->g = BN_dup(g);
/* 2. set keys */
ret = DH_generate_key(dh1);
if (ret == 0) {
fprintf(stderr, "DH_generate_key\n");
exit(EXIT_FAILURE);
}
ret = DH_generate_key(dh2);
if (ret == 0) {
fprintf(stderr, "DH_generate_key\n");
exit(EXIT_FAILURE);
}
/* 3. compute shared secret */
size = DH_size(dh1);
if (size != DH_size(dh2)) {
fprintf(stderr, "size does not match!\n");
exit(EXIT_FAILURE);
}
sec1 = malloc(size);
sec2 = malloc(size);
if (!sec1 || !sec2) {
perror("malloc");
exit(EXIT_FAILURE);
}
ret = DH_compute_key(sec1, dh2->pub_key, dh1);
if (ret == -1) {
fprintf(stderr, "DH_compute_key");
exit(EXIT_FAILURE);
}
ret = DH_compute_key(sec2, dh1->pub_key, dh2);
if (ret == -1) {
fprintf(stderr, "DH_compute_key");
exit(EXIT_FAILURE);
}
/* 4. compare shared secret */
if (verbose) {
printf("shared secret 1\n");
print_secret(sec1, size);
printf("shared secret 2\n");
print_secret(sec2, size);
}
if (memcmp(sec1, sec2, size) == 0)
ret = 1;
else
ret = 0;
free(sec2);
free(sec1);
DH_free(dh2);
DH_free(dh1);
BN_free(g);
BN_free(p);
return ret;
}
