openvpn: Change the default cipher to AES-256-GCM for server configurations

This change makes the server use AES-256-GCM instead of BF-CBC as the default
cipher for the VPN tunnel.  To avoid breaking existing running configurations
defaulting to BF-CBC, the Negotiable Crypto Parameters (NCP) list contains
the BF-CBC in addition to AES-CBC.  This makes it possible to migrate
existing older client configurations one-by-one to use at least AES-CBC unless
the client is updated to v2.4 (which defaults to upgrade to AES-GCM automatically)

Upstream-Status: Backport [https://src.fedoraproject.org/rpms/openvpn/blob/rawhide/f/0001-Change-the-default-cipher-to-AES-256-GCM-for-server-.patch]

Signed-off-by: Wang Mingyu <wangmy@fujitsu.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/meta-networking/recipes-support/openvpn/openvpn/openvpn@.service b/meta-networking/recipes-support/openvpn/openvpn/openvpn@.service
index 358dcb791a..01dd2e8c25 100644
--- a/meta-networking/recipes-support/openvpn/openvpn/openvpn@.service
+++ b/meta-networking/recipes-support/openvpn/openvpn/openvpn@.service
@@ -6,7 +6,7 @@ After=syslog.target network.target
 PrivateTmp=true
 Type=forking
 PIDFile=/var/run/openvpn/%i.pid
-ExecStart=/usr/sbin/openvpn --daemon --writepid /var/run/openvpn/%i.pid --cd /etc/openvpn/ --config %i.conf
+ExecStart=/usr/sbin/openvpn --daemon --writepid /var/run/openvpn/%i.pid --cd /etc/openvpn/ --cipher AES-256-GCM --data-ciphers AES-256-GCM:AES-128-GCM:AES-256-CBC:AES-128-CBC:BF-CBC --config %i.conf
 
 [Install]
 WantedBy=multi-user.target