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Randomize CN and server name, fixed #48

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Solution taken from pivpn install script here: https://github.com/pivpn/pivpn/blob/master/auto_install/install.sh.
Repo in https://github.com/pivpn/pivpn.
This commit is contained in:
cezar97 2018-01-18 17:19:51 +01:00 committed by GitHub
parent f681c0bd34
commit 4f5f43e503
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1 changed files with 11 additions and 4 deletions
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15
openvpn-install.sh
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@ -469,18 +469,25 @@ WantedBy=multi-user.target" > /etc/systemd/system/iptables.service
chown -R root:root /etc/openvpn/easy-rsa/
rm -rf ~/EasyRSA-3.0.3.tgz
cd /etc/openvpn/easy-rsa/
# Generate a random, alphanumeric identifier of 16 characters for CN and one for server name =>
### => FROM https://github.com/pivpn/pivpn/blob/master/auto_install/install.sh ###
NEW_UUID_CN=$(cat /dev/urandom | tr -dc 'a-zA-Z0-9' | fold -w 16 | head -n 1)
NEW_UUID_SERVER=$(cat /dev/urandom | tr -dc 'a-zA-Z0-9' | fold -w 16 | head -n 1)
SERVER_CN="cn_$NEW_UUID_CN"
SERVER_NAME="server_$NEW_UUID_SERVER"
echo "set_var EASYRSA_KEY_SIZE $RSA_KEY_SIZE" > vars
echo "set_var EASYRSA_REQ_CN $SERVER_CN" >> vars
# Create the PKI, set up the CA, the DH params and the server + client certificates
./easyrsa init-pki
./easyrsa --batch build-ca nopass
openssl dhparam -out dh.pem $DH_KEY_SIZE
./easyrsa build-server-full server nopass
./easyrsa build-server-full $SERVER_NAME nopass
./easyrsa build-client-full $CLIENT nopass
EASYRSA_CRL_DAYS=3650 ./easyrsa gen-crl
# generate tls-auth key
openvpn --genkey --secret /etc/openvpn/tls-auth.key
# Move all the generated files
cp pki/ca.crt pki/private/ca.key dh.pem pki/issued/server.crt pki/private/server.key /etc/openvpn/easy-rsa/pki/crl.pem /etc/openvpn
cp pki/ca.crt pki/private/ca.key dh.pem pki/issued/$SERVER_NAME.crt pki/private/$SERVER_NAME.key /etc/openvpn/easy-rsa/pki/crl.pem /etc/openvpn
# Make cert revocation list readable for non-root
chmod 644 /etc/openvpn/crl.pem
@ -539,8 +546,8 @@ ifconfig-pool-persist ipp.txt" >> /etc/openvpn/server.conf
echo 'push "redirect-gateway def1 bypass-dhcp" '>> /etc/openvpn/server.conf
echo "crl-verify crl.pem
ca ca.crt
cert server.crt
key server.key
cert $SERVER_NAME.crt
key $SERVER_NAME.key
tls-auth tls-auth.key 0
dh dh.pem
auth SHA256