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-rw-r--r--package/utils/px5g-standalone/src/library/x509write.c27
1 files changed, 25 insertions, 2 deletions
diff --git a/package/utils/px5g-standalone/src/library/x509write.c b/package/utils/px5g-standalone/src/library/x509write.c
index fabee20ea6..1091568745 100644
--- a/package/utils/px5g-standalone/src/library/x509write.c
+++ b/package/utils/px5g-standalone/src/library/x509write.c
@@ -1000,6 +1000,26 @@ static int x509write_make_sign(x509_raw *chain, rsa_context *privkey)
}
/*
+ * 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)
@@ -1020,8 +1040,11 @@ 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;