}
/*
+ * Create a random serial
+ */
+static int get_random_serial(void)
+{
+ int random = 0;
+ FILE *fd;
+
+ fd = fopen("/dev/urandom", "r");
+
+ if (fd) {
+ if (fread(&random, 1, sizeof(random), fd) != sizeof(random))
+ random = 0;
+
+ fclose(fd);
+ }
+
+ return random;
+}
+
+/*
* Create a self signed certificate
*/
int x509write_create_sign(x509_raw *chain, rsa_context *privkey)
/*
* CertificateSerialNumber ::= INTEGER
*/
- srand((unsigned int) time(NULL));
- serial = rand();
+ serial = get_random_serial();
+
+ if (serial == 0)
+ return 1;
+
if ((ret = asn1_add_int(serial, &chain->serial)) != 0)
return ret;