pivpn/scripts/uninstall.sh
2020-10-24 13:41:07 +02:00

268 lines
8.7 KiB
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Executable file

#!/usr/bin/env bash
# PiVPN: Uninstall Script
### FIXME: global: config storage, refactor all scripts to adhere to the storage
### FIXME: use variables where appropriate, reduce magic numbers by 99.9%, at least.
# Find the rows and columns. Will default to 80x24 if it can not be detected.
screen_size=$(stty size 2>/dev/null || echo 24 80)
rows=$(echo "$screen_size" | awk '{print $1}')
columns=$(echo "$screen_size" | awk '{print $2}')
# Divide by two so the dialogs take up half of the screen, which looks nice.
r=$(( rows / 2 ))
c=$(( columns / 2 ))
# Unless the screen is tiny
r=$(( r < 20 ? 20 : r ))
c=$(( c < 70 ? 70 : c ))
PKG_MANAGER="apt-get"
UPDATE_PKG_CACHE="${PKG_MANAGER} update"
dnsmasqConfig="/etc/dnsmasq.d/02-pivpn.conf"
setupVarsFile="setupVars.conf"
setupConfigDir="/etc/pivpn"
pivpnFilesDir="/usr/local/src/pivpn"
pivpnScriptDir="/opt/pivpn"
if [ -r "${setupConfigDir}/wireguard/${setupVarsFile}" ] && [ -r "${setupConfigDir}/openvpn/${setupVarsFile}" ]; then
vpnStillExists=1
# Two protocols have been installed, check if the script has passed
# an argument, otherwise ask the user which one he wants to remove
if [ $# -ge 1 ]; then
VPN="$1"
echo "::: Uninstalling VPN: $VPN"
else
chooseVPNCmd=(whiptail --backtitle "Setup PiVPN" --title "Uninstall" --separate-output --radiolist "Both OpenVPN and WireGuard are installed, choose a VPN to uninstall (press space to select):" "${r}" "${c}" 2)
VPNChooseOptions=(WireGuard "" on
OpenVPN "" off)
if VPN=$("${chooseVPNCmd[@]}" "${VPNChooseOptions[@]}" 2>&1 >/dev/tty) ; then
echo "::: Uninstalling VPN: $VPN"
VPN="${VPN,,}"
else
echo "::: Cancel selected, exiting...."
exit 1
fi
fi
setupVars="${setupConfigDir}/${VPN}/${setupVarsFile}"
else
vpnStillExists=0
if [ -r "${setupConfigDir}/wireguard/${setupVarsFile}" ]; then
setupVars="${setupConfigDir}/wireguard/${setupVarsFile}"
elif [ -r "${setupConfigDir}/openvpn/${setupVarsFile}" ]; then
setupVars="${setupConfigDir}/openvpn/${setupVarsFile}"
fi
fi
if [ ! -f "${setupVars}" ]; then
echo "::: Missing setup vars file!"
exit 1
fi
# shellcheck disable=SC1090
source "${setupVars}"
### FIXME: introduce global lib
spinner(){
local pid=$1
local delay=0.50
local spinstr='/-\|'
while ps a | awk '{print $1}' | grep -q "$pid"; do
local temp=${spinstr#?}
printf " [%c] " "$spinstr"
local spinstr=$temp${spinstr%"$temp"}
sleep $delay
printf "\\b\\b\\b\\b\\b\\b"
done
printf " \\b\\b\\b\\b"
}
removeAll(){
# Stopping and disabling services
echo "::: Stopping and disabling services..."
if [ "$VPN" = "wireguard" ]; then
systemctl stop wg-quick@wg0
systemctl disable wg-quick@wg0 &> /dev/null
elif [ "$VPN" = "openvpn" ]; then
systemctl stop openvpn
systemctl disable openvpn &> /dev/null
fi
# Removing firewall rules.
echo "::: Removing firewall rules..."
if [ "$USING_UFW" -eq 1 ]; then
### FIXME: SC2154
ufw delete allow "${pivpnPORT}"/"${pivpnPROTO}" > /dev/null
### FIXME: SC2154
ufw route delete allow in on "${pivpnDEV}" from "${pivpnNET}/${subnetClass}" out on "${IPv4dev}" to any > /dev/null
sed "/-I POSTROUTING -s ${pivpnNET}\\/${subnetClass} -o ${IPv4dev} -j MASQUERADE -m comment --comment ${VPN}-nat-rule/d" -i /etc/ufw/before.rules
iptables -t nat -D POSTROUTING -s "${pivpnNET}/${subnetClass}" -o "${IPv4dev}" -j MASQUERADE -m comment --comment "${VPN}-nat-rule"
ufw reload &> /dev/null
elif [ "$USING_UFW" -eq 0 ]; then
if [ "$INPUT_CHAIN_EDITED" -eq 1 ]; then
iptables -D INPUT -i "${IPv4dev}" -p "${pivpnPROTO}" --dport "${pivpnPORT}" -j ACCEPT -m comment --comment "${VPN}-input-rule"
fi
if [ "$FORWARD_CHAIN_EDITED" -eq 1 ]; then
iptables -D FORWARD -d "${pivpnNET}/${subnetClass}" -i "${IPv4dev}" -o "${pivpnDEV}" -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT -m comment --comment "${VPN}-forward-rule"
iptables -D FORWARD -s "${pivpnNET}/${subnetClass}" -i "${pivpnDEV}" -o "${IPv4dev}" -j ACCEPT -m comment --comment "${VPN}-forward-rule"
fi
iptables -t nat -D POSTROUTING -s "${pivpnNET}/${subnetClass}" -o "${IPv4dev}" -j MASQUERADE -m comment --comment "${VPN}-nat-rule"
iptables-save > /etc/iptables/rules.v4
fi
# Disable IPv4 forwarding
if [ "${vpnStillExists}" -eq 0 ]; then
sed -i '/net.ipv4.ip_forward=1/c\#net.ipv4.ip_forward=1' /etc/sysctl.conf
sysctl -p
fi
# Purge dependencies
echo "::: Purge dependencies..."
for i in "${INSTALLED_PACKAGES[@]}"; do
while true; do
read -rp "::: Do you wish to remove $i from your system? [Y/n]: " yn
case $yn in
[Yy]* ) if [ "${i}" = "wireguard-tools" ]; then
# The bullseye repo may not exist if wireguard was available at the
# time of installation.
if [ -f /etc/apt/sources.list.d/pivpn-bullseye-repo.list ]; then
echo "::: Removing Debian Bullseye repo..."
rm -f /etc/apt/sources.list.d/pivpn-bullseye-repo.list
rm -f /etc/apt/preferences.d/pivpn-limit-bullseye
echo "::: Updating package cache..."
${UPDATE_PKG_CACHE} &> /dev/null & spinner $!
fi
if [ -f /etc/systemd/system/wg-quick@.service.d/override.conf ]; then
rm -f /etc/systemd/system/wg-quick@.service.d/override.conf
fi
elif [ "${i}" = "unattended-upgrades" ]; then
rm -rf /var/log/unattended-upgrades
rm -rf /etc/apt/apt.conf.d/*periodic
rm -rf /etc/apt/apt.conf.d/*unattended-upgrades
elif [ "${i}" = "openvpn" ]; then
if [ -f /etc/apt/sources.list.d/pivpn-openvpn-repo.list ]; then
echo "::: Removing OpenVPN software repo..."
rm -f /etc/apt/sources.list.d/pivpn-openvpn-repo.list
echo "::: Updating package cache..."
${UPDATE_PKG_CACHE} &> /dev/null & spinner $!
fi
deluser openvpn
rm -f /etc/rsyslog.d/30-openvpn.conf
rm -f /etc/logrotate.d/openvpn
fi
printf ":::\\tRemoving %s..." "$i"; $PKG_MANAGER -y remove --purge "$i" &> /dev/null & spinner $!; printf "done!\\n";
break
;;
[Nn]* ) printf ":::\\tSkipping %s\\n" "$i";
break
;;
* ) printf "::: You must answer yes or no!\\n";;
esac
done
done
# Take care of any additional package cleaning
printf "::: Auto removing remaining dependencies..."
$PKG_MANAGER -y autoremove &> /dev/null & spinner $!; printf "done!\\n";
printf "::: Auto cleaning remaining dependencies..."
$PKG_MANAGER -y autoclean &> /dev/null & spinner $!; printf "done!\\n";
if [ -f "$dnsmasqConfig" ]; then
rm -f "$dnsmasqConfig"
pihole restartdns
fi
echo ":::"
echo "::: Removing VPN configuration files..."
if [ "$VPN" = "wireguard" ]; then
rm -f /etc/wireguard/wg0.conf
rm -rf /etc/wireguard/configs
rm -rf /etc/wireguard/keys
### FIXME SC2154
rm -rf "$install_home/configs"
elif [ "$VPN" = "openvpn" ]; then
rm -rf /var/log/*openvpn*
rm -f /etc/openvpn/server.conf
rm -f /etc/openvpn/crl.pem
rm -rf /etc/openvpn/easy-rsa
rm -rf /etc/openvpn/ccd
rm -rf "$install_home/ovpns"
fi
if [ "${vpnStillExists}" -eq 0 ]; then
echo ":::"
echo "::: Removing pivpn system files..."
rm -rf "${setupConfigDir}"
rm -rf "${pivpnFilesDir}"
rm -f /var/log/*pivpn*
rm -f /etc/bash_completion.d/pivpn
unlink "${pivpnScriptDir}"
unlink /usr/local/bin/pivpn
else
if [[ ${VPN} == 'wireguard' ]]; then
othervpn='openvpn'
else
othervpn='wireguard'
fi
echo ":::"
echo "::: Other VPN ${othervpn} still present, so not"
echo "::: removing pivpn system files"
rm -f "${setupConfigDir}/${VPN}/${setupVarsFile}"
# Restore single pivpn script and bash completion for the remaining VPN
$SUDO unlink /usr/local/bin/pivpn
$SUDO ln -s -T "${pivpnFilesDir}/scripts/${othervpn}/pivpn.sh" /usr/local/bin/pivpn
$SUDO ln -s -T "${pivpnFilesDir}/scripts/${othervpn}/bash-completion" /etc/bash_completion.d/pivpn
# shellcheck disable=SC1091
. /etc/bash_completion.d/pivpn
fi
echo ":::"
printf "::: Finished removing PiVPN from your system.\\n"
printf "::: Reinstall by simpling running\\n:::\\n:::\\tcurl -L https://install.pivpn.io | bash\\n:::\\n::: at any time!\\n:::\\n"
}
askreboot(){
printf "It is \\e[1mstrongly\\e[0m recommended to reboot after un-installation.\\n"
read -p "Would you like to reboot now? [y/n]: " -n 1 -r
echo
if [[ ${REPLY} =~ ^[Yy]$ ]]; then
printf "\\nRebooting system...\\n"
sleep 3
shutdown -r now
fi
}
######### SCRIPT ###########
echo "::: Preparing to remove packages, be sure that each may be safely removed depending on your operating system."
echo "::: (SAFE TO REMOVE ALL ON RASPBIAN)"
while true; do
read -rp "::: Do you wish to completely remove PiVPN configuration and installed packages from your system? (You will be prompted for each package) [y/n]: " yn
case $yn in
[Yy]* ) removeAll; askreboot; break;;
[Nn]* ) printf "::: Not removing anything, exiting...\\n"; break;;
esac
done