easyrsa3 batch

# easyrsa3 using batch with no prompts

mkdir $HOME/clientside
mkdir $HOME/serverside
cd $HOME/serverside
wget https://github.com/OpenVPN/easy-rsa/archive/master.zip
unzip master.zip
cd easy-rsa-master/easyrsa3
openvpn --genkey --secret ta.key
./easyrsa init-pki
./easyrsa --batch build-ca nopass
./easyrsa --batch build-server-full server nopass
./easyrsa --batch build-client-full client1 nopass
./easyrsa gen-dh

# we will merge certs and keys into config files
# one for server and one for client

cp $HOME/serverside/easy-rsa-master/easyrsa3/pki/ca.crt $HOME/serverside/
cp $HOME/serverside/easy-rsa-master/easyrsa3/pki/issued/server.crt $HOME/serverside/
cp $HOME/serverside/easy-rsa-master/easyrsa3/pki/dh.pem $HOME/serverside/dh2048.pem
cp $HOME/serverside/easy-rsa-master/easyrsa3/pki/private/server.key $HOME/serverside/
cp $HOME/serverside/easy-rsa-master/easyrsa3/ta.key $HOME/serverside/
cp $HOME/serverside/easy-rsa-master/easyrsa3/pki/issued/client1.crt $HOME/clientside/
cp $HOME/serverside/easy-rsa-master/easyrsa3/ta.key $HOME/clientside/
cp $HOME/serverside/easy-rsa-master/easyrsa3/pki/ca.crt $HOME/clientside/
cp $HOME/serverside/easy-rsa-master/easyrsa3/pki/private/client1.key $HOME/clientside/

# Client Script
nano $HOME/clientside/raspberrypi.ovpn

dev tun
proto udp
remote change_this_to_server_address 34557
resolv-retry infinite
ca ca.crt
cert client1.crt
key client1.key
tls-auth ta.key 1
remote-cert-tls server
cipher AES-256-CBC
verb 3

# Now merge certs and keys into client script, so we only have one file to handle
cd $HOME/clientside/
wget --no-check-cert https://www.dropbox.com/s/v228zvccef9d10c/merge.sh -O merge.sh
sudo chmod +x merge.sh
sudo ./merge.sh
sudo chown $USER $HOME/clientside/raspberrypi.ovpn

# Now transfer client script raspberrypi.ovpn
# in $HOME/clientside/ to your client PC
# Due to permissions, I had to transfer it to C:\
# Then in windows, copy the file
# to C:\Program Files (x86)\OpenVPN\config

# Server Script
nano $HOME/serverside/server.conf

port 34557
proto udp
dev tun
ca ca.crt
cert server.crt
key server.key
tls-auth ta.key 0
dh dh2048.pem
cipher AES-256-CBC
user nobody
group nogroup
status openvpn-status.log
verb 3
push "redirect-gateway def1"
push "dhcp-option DNS"
push "dhcp-option DNS"
keepalive 5 30

# Now merge certs and keys into server script, so we only have one file to handle
cd $HOME/serverside/
wget --no-check-cert https://www.dropbox.com/s/9wc3we8ezfucj1j/merge_server.sh -O merge_server.sh
sudo chmod +x merge_server.sh
sudo ./merge_server.sh

# Now copy the merged server script to /etc/openvpn/
sudo cp $HOME/serverside/server.conf /etc/openvpn/

# Comments about nopass option, if you omit it.
# easyrsa --batch build-ca
# you need password to create and sign certs
# easyrsa --batch build-server-full server
# you need password to start server, not a good idea
# if you expected the server to start automatically.
# Don't do it.
# easyrsa --batch build-client-full client1
# you need password for client to connect, very annoying


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