open-balena/scripts/gen-vpn-certs
Rich Bayliss 95d53993bc
vpn: Remove BALENA_ROOT_CA from the VPN trust chain
The VPN CA shouldn't need to be signed by the same CA that the HAproxy service
certificate is signed by. By removing this chain we are able to use a
different CA for the HTTPS services without impacting on the VPN service.

Change-type: patch
Signed-off-by: Rich Bayliss <rich@balena.io>
2019-03-20 09:13:19 +00:00

48 lines
1.4 KiB
Bash
Executable File

#!/bin/bash -e
usage() {
echo "usage: $0 COMMON_NAME [OUT]"
echo
echo " COMMON_NAME the domain name the certificate is valid for, eg. example.com"
echo " OUT path to output directory generated files will be placed in"
echo
}
if [ -z "$1" ]; then
usage
exit 1
fi
CMD="$(realpath "$0")"
DIR="$(dirname "${CMD}")"
CN="$1"
OUT="$(realpath "${2:-.}")"
# shellcheck source=scripts/ssl-common.sh
source "${DIR}/ssl-common.sh"
VPN_PKI="$(realpath "${OUT}/vpn")"
VPN_CA="${VPN_PKI}/ca.crt"
VPN_CRT="${VPN_PKI}/issued/vpn.${CN}.crt"
VPN_KEY="${VPN_PKI}/private/vpn.${CN}.key"
VPN_DH="${VPN_PKI}/dh.pem"
if [ ! -f $VPN_CA ] || [ ! -f $VPN_CRT ] || [ ! -f $VPN_KEY ] || [ ! -f $VPN_DH ]; then
rm -f $VPN_CA $VPN_CRT $VPN_DH $VPN_KEY
# generate VPN CA
"$easyrsa_bin" --pki-dir="${VPN_PKI}" init-pki &>/dev/null
"$easyrsa_bin" --pki-dir="${VPN_PKI}" --days="${CA_EXPIRY_DAYS}" --req-cn="vpn-ca.${CN}" build-ca nopass 2>/dev/null
# generate and sign vpn server certificate
"$easyrsa_bin" --pki-dir="${VPN_PKI}" --days="${CRT_EXPIRY_DAYS}" build-server-full "vpn.${CN}" nopass 2>/dev/null
# generate vpn dhparams (keysize of 2048 will do, 4096 can wind up taking hours to generate)
"$easyrsa_bin" --pki-dir="${VPN_PKI}" --keysize=2048 gen-dh 2>/dev/null
# update indexes and generate CRLs
"$easyrsa_bin" --pki-dir="${VPN_PKI}" update-db 2>/dev/null
"$easyrsa_bin" --pki-dir="${VPN_PKI}" gen-crl 2>/dev/null
fi