userpref: [GnuTLS] Use valid serial for >= 3.6.0
Another change in 3.6.0 is that a serial of '\0' is not valid anymore.
Bump it to one.
diff --git a/common/userpref.c b/common/userpref.c
index f496fee..be745cb 100644
--- a/common/userpref.c
+++ b/common/userpref.c
@@ -598,7 +598,7 @@
/* generate certificates */
gnutls_x509_crt_set_key(root_cert, root_privkey);
- gnutls_x509_crt_set_serial(root_cert, "\x00", 1);
+ gnutls_x509_crt_set_serial(root_cert, "\x01", 1);
gnutls_x509_crt_set_version(root_cert, 3);
gnutls_x509_crt_set_ca_status(root_cert, 1);
gnutls_x509_crt_set_activation_time(root_cert, time(NULL));
@@ -606,7 +606,7 @@
gnutls_x509_crt_sign2(root_cert, root_cert, root_privkey, GNUTLS_DIG_SHA1, 0);
gnutls_x509_crt_set_key(host_cert, host_privkey);
- gnutls_x509_crt_set_serial(host_cert, "\x00", 1);
+ gnutls_x509_crt_set_serial(host_cert, "\x01", 1);
gnutls_x509_crt_set_version(host_cert, 3);
gnutls_x509_crt_set_ca_status(host_cert, 0);
gnutls_x509_crt_set_key_usage(host_cert, GNUTLS_KEY_KEY_ENCIPHERMENT | GNUTLS_KEY_DIGITAL_SIGNATURE);
@@ -703,7 +703,7 @@
if (GNUTLS_E_SUCCESS == gnutls_error) {
/* now generate device certificate */
gnutls_x509_crt_set_key(dev_cert, fake_privkey);
- gnutls_x509_crt_set_serial(dev_cert, "\x00", 1);
+ gnutls_x509_crt_set_serial(dev_cert, "\x01", 1);
gnutls_x509_crt_set_version(dev_cert, 3);
gnutls_x509_crt_set_ca_status(dev_cert, 0);
gnutls_x509_crt_set_activation_time(dev_cert, time(NULL));
