#!/usr/bin/env bash
# PiVPN: revoke client script

INSTALL_USER=$(cat /etc/pivpn/INSTALL_USER)
REVOKE_STATUS=$(cat /etc/pivpn/REVOKE_STATUS)
PLAT=$(cat /etc/pivpn/DET_PLATFORM)
INDEX="/etc/openvpn/easy-rsa/keys/index.txt"

if [ ! -f $INDEX ]; then
        printf "The file: $INDEX \n"
        printf "Was not Found!\n"
        exit 1
fi

printf "\n"
printf " ::\e[4m  Certificate List  \e[0m:: \n"

i=0
while read -r line || [[ -n "$line" ]]; do
    status=$(echo $line | awk '{print $1}')
    if [[ $status = "V" ]]; then
        var=$(echo $line | sed -e 's/^.*CN=\([^/]*\)\/.*/\1/')
        certs[$i]=$var
        if [ "$i" != 0 ]; then
            printf "  $var\n"
        fi
        let i=i+1
        y=$i
    fi
done <$INDEX
printf "\n"

echo "::: Please enter the Name of the client to be revoked from the list above:"
read NAME

if [[ -z "$NAME" ]]; then
    printf '%s\n' "::: You can not leave this blank!"
    exit 1
fi

for((x=1;x<=$y;++x)); do
    if [[ ${certs[$x]} = ${NAME} ]]; then
        Valid=1
    fi
done

if [[ -z "$Valid" ]]; then
    printf "::: You didn't enter a valid cert name!\n"
    exit 1
fi

cd /etc/openvpn/easy-rsa
source /etc/openvpn/easy-rsa/vars

./revoke-full $NAME
echo "::: Certificate revoked, removing ovpns from /home/$INSTALL_USER/ovpns"
rm /home/$INSTALL_USER/ovpns/$NAME.ovpn
cp /etc/openvpn/easy-rsa/keys/crl.pem /etc/openvpn/crl.pem
echo "::: Completed!"

if [ $REVOKE_STATUS == 0 ]; then
        echo 1 > /etc/pivpn/REVOKE_STATUS
        printf "\nThis seems to be the first time you have revoked a cert.\n"
        printf "We are adding the CRL to the server.conf and restarting openvpn.\n"
        sed -i '/#crl-verify/c\crl-verify /etc/openvpn/crl.pem' /etc/openvpn/server.conf
        if [[ ${PLAT} == "Ubuntu" || ${PLAT} == "Debian" ]]; then
            service openvpn restart
        else
            systemctl restart openvpn.service
        fi
fi