#!/bin/bash

# Get current status of a VPN connection with options to connect/disconnect.
# Working with OpenConnect, but can work with any executable VPN. Commands
# that require admin permissions should be whitelisted with 'visudo', e.g.:
#
#joesmith ALL=(ALL) NOPASSWD: /usr/local/bin/openconnect
#joesmith ALL=(ALL) NOPASSWD: /usr/bin/killall -2 openconnect

# <xbar.title>VPN Status</xbar.title>
# <xbar.version>v1.1</xbar.version>
# <xbar.author>Jesse Jarzynka</xbar.author>
# <xbar.author.github>jessejoe</xbar.author.github>
# <xbar.desc>Displays status of a VPN interface with option to connect/disconnect.</xbar.desc>
# <xbar.image>http://i.imgur.com/RkmptwO.png</xbar.image>

mkdir -p "/Users/$USER/.log/"
logfile="/Users/$USER/.log/bibVPN.log"
echo -e "\nRun $0 , $(date)" >>$logfile
PATH=$PATH:/usr/local/bin
VPN_EXECUTABLE=$(which openconnect)
VPN_HOST="$3"
VPN_USERNAME="$2"
#DIR=$(dirname "${BASH_SOURCE[0]}")
DIR="$( cd -- "$(dirname "$0")" >/dev/null 2>&1 ; pwd -P )"
OC_PIDFILE="/var/run/openconnect/vpn.bib.de.pid"
SETTINGSFILE="$DIR/settings.csv"
ACCOUNTFILE="$DIR/accounts.csv"
SHOW_SETTINGS='ON'
SET_ICONS='no'
NET_FILTER='172.[123][0-9].1[67][80].'
FONT=( 'size=14' 'font=UbuntuMono' )
# Icons
ICON_connected="iVBORw0KGgoAAAANSUhEUgAAABgAAAAWCAYAAAGtemweAAAACXBIWXMAAAsSAAALEgHS3X78AAAA+klEQVR4nNRUwQ2DMAzMKy8WYIZOwb8LtUtAJSZp34zBCn3y4Y3cWLEr13KSllKhnnRKcvHZ4AScS6BJbUSMgRCncfJcaBG0KMcvMIj83ircWcUh9VTI46onO1A75sC2FIjpT0qHwMUy4AZSzuU6a7D2smDzLRu1Fi11aKRGJOHVyzKHlGExXu5MmlkJ6HpfRHbWx5SBR+tMtjNYOuQMfGV5Lecm8HSLQf8BH9iLC2BxoRiM/Qi9SnSlS1MRG9VLIM/bH4NM7Cgp/rImYkeaU4XQW8QsDBVpk9GeSRRnDb1FyCSWVtovYpcCtZG83rLALzwvuKskSNT2xwMAAP//L6vzxgAAAAJJREFUAwBX1u55AAAAAElFTkSuQmCC"
ICON_disconnected="iVBORw0KGgoAAAANSUhEUgAAABgAAAAWCAYAAAGtemweAAAACXBIWXMAAAsSAAALEgHS3X78AAAA2klEQVR4nNxTQQ6DMAyrqvGAXfeK7Uh5wHbgyhlxaP//hDXClbLOXUHqhDZLFsGJEzUUYwq4lBIrpsiwhirQEDHxRSw69mFU/a1OJNHh+ZYILMHibThjHUtkXyuU9tdMD5GeGSQh1LF+/2hguQPRY0MTFlGEzQ6bOJYMnhzuBo1OCrjejqx0KhnSk32TdgamhyaGP4SNHNQFYPSokdpdGLJGd1yaDpT4kdWIZ/PPoBsLTriRM+igmWyQeKtYlKGDNpP1iGZQkzTxVqGbMK2Wr+KQAU09Xx/wW3gCAAD//+SvwXMAAAACSURBVAMAV9bueQAAAABJRU5ErkJggg=="
# A command that will result in your VPN password. Recommend using
# "security find-generic-password -g -a foo" where foo is an account
# in your OSX Keychain, to avoid passwords stored in plain text
GET_VPN_PASSWORD="security find-generic-password -g -a $VPN_USERNAME 2>&1 >/dev/null | cut -d'\"' -f2"
if [[ -z $GET_VPN_PASSWORD ]] ; then 
    if $(read "Es wurde kein Passwort im Schlüsselbund gefunden. Soll dort eins hinterlegt werden? (ja/nein)") == '[Jj][aA]' ; then
        local $keychainPW = $(read "Wie lautet das Password für den Benutzer $VPN_USERNAME ?")
        security add-generic-password -a $VPN_USERNAME -s openconnect -w $keychainPW
    fi
fi

# Command to determine if VPN is connected or disconnected
VPN_CONNECTED="ifconfig | egrep -A1 'inet $NET_FILTER' |cut -d' ' -f2"
# Command to run to disconnect VPN
VPN_DISCONNECT_CMD="sudo killall -2 openconnect"
# Get IP of Current VPN Tunnel
IP=$(ifconfig | egrep -A1 'inet $NET_FILTER' |cut -d' ' -f2)

function askForVPNName(){
    results=$( /usr/bin/osascript -e 'display dialog "Wie lautet die E-Mail des Benutzers, der zum Verbinden verwendet werden soll?" default answer "vorname.nachname@bib.de" buttons {"Cancel","OK"} default button {"OK"} with title "Neuen User für das VPN anlegen"' )

    theButton=$( echo "$results" | /usr/bin/awk -F "button returned:|," '{print $2}' )
    theText=$( echo "$results" | /usr/bin/awk -F "text returned:" '{print $2}' )

    if [[ $theButton == "OK" ]] ;then
        echo $theText;
    fi
}

case "$1" in
    connect)
        VPN_PASSWORD=$(eval "$GET_VPN_PASSWORD")
        VPN_EXECUTABLE_PARAMS="--servercert $4 --protocol=fortinet" # Optional
        # VPN connection command, should eventually result in $VPN_CONNECTED,
        # may need to be modified for VPN clients other than openconnect
        echo "echo $VPN_PASSWORD | sudo $VPN_EXECUTABLE $VPN_EXECUTABLE_PARAMS --user $VPN_USERNAME --passwd-on-stdin $VPN_HOST --pid-file=$OC_PIDFILE --background" > $logfile 2>&1
        echo "$VPN_PASSWORD" | sudo $VPN_EXECUTABLE $VPN_EXECUTABLE_PARAMS --user $VPN_USERNAME --passwd-on-stdin $VPN_HOST --pid-file=$OC_PIDFILE --background > $logfile 2>&1
        
        IP=$(ifconfig | egrep -A1 'inet $NET_FILTER' |cut -d' ' -f2)
        while [ -z $IP ]; do echo "noch keine IP" ; sleep 0.5 ; IP=$(ifconfig | egrep -A1 'inet $NET_FILTER' |cut -d' ' -f2) ; done
        msg='display notification "Erfolgreich verbunden \nConnected User: '$VPN_USERNAME'" with title "OpenFortiVPN" subtitle "Deine IP lautet: '$IP'" sound name "Brise"'
        errmsg='display notification "Verbindungsversuch nicht erfolgreich" with title "OpenFortiVPN" subtitle "Schade" sound name "Brise"'
        if  [[ $IP =~ 172 ]] ; then osascript -e "$msg" ; else osascript -e "$errmsg" ; fi
        # Wait for connection so menu item refreshes instantly
        until eval "$VPN_CONNECTED"; do sleep 1; done
        ;;
    disconnect)
        eval "$VPN_DISCONNECT_CMD"
        # Wait for disconnection so menu item refreshes instantly
        until [ -z "$(eval "$VPN_CONNECTED")" ]; do sleep 1; done
        osascript -e 'display notification "VPN Tunnel erfolgreich geschlossen" with title "OpenFortiVPN" subtitle "Mach Feierabend" sound name "Submarine"'
        ;;
    newuser)
        echo "Sie wollen einen weiteren Benutzer für das VPN anlegen. Geben Sie dazu die folgenden Dinge ein."
        #echo -n "Wie lautet der Name der neuen Verbindung? " ; read NEW_VPN_NAME
        NEW_VPN_NAME=$(askForVPNName)
        echo -n "Wie lautet der VPN-Server? "; read NEW_VPN_HOST
        echo -n "Wie lautet die E-Mail des Benutzers? " ; read NEW_VPN_USERNAME
        NEW_VPN_PUBKEY=$(gnutls-cli --print-cert $NEW_VPN_HOST |grep -e 'pin-.*:'|awk '{$1=$1;print}')
        NEW_VPN_PASSWORD=$(security find-generic-password -g -a $NEW_VPN_USERNAME 2>&1 >/dev/null)
        if [[ $NEW_VPN_PASSWORD =~ password ]] ; then
            echo "Es ist bereits ein Passwort im Schlüsselbund für $NEW_VPN_USERNAME hinterlegt."
        else
            echo -n "Es ist noch kein Passwort im Schlüsselbund hinterlegt Bitte einmal das Passwort angeben : " ;
            NEW_VPN_PASS = $(read )
            security add-generic-password -a $NEW_VPN_USERNAME -s openconnect -w $NEW_VPN_PASS
        fi
        echo "$NEW_VPN_NAME,$NEW_VPN_USERNAME,$NEW_VPN_HOST,$NEW_VPN_PUBKEY" #>> $ACCOUNTFILE
        ;;
esac

#if [ -n "$(eval "$VPN_CONNECTED")" ]; then
if [ -f $OC_PIDFILE ]; then
    if [ $SET_ICONS == 'yes']; then echo "| templateImage=$ICON_connected" ; else echo "VPN ✔ |$FONT color=green" ; fi
    #
    echo '---'
    echo "Disconnect VPN | bash='$0' param1=disconnect terminal=false refresh=true"
    echo "User: $(ps -ef | grep -e '--user\ ' | cut -d' ' -f 33)"
    echo "IP: $IP"
    echo "---"
    echo "Settings"
    echo "--Farbige Icons aus"
    echo "--Tunnelblick Icons aus"
    echo "--Neuen User anlegen| shell='/Users/$USER/Library/Application\ Support/xbar/plugins/$(basename $0)' param1=newuser terminal=true refresh=true"
    exit
else
    if [ $SET_ICONS == 'yes' ] ; then echo "| templateImage=$ICON_disconnected" ; else echo "VPN ❌ | $FONT color=Crimson" ; fi
    echo '---'
    # Alle User aus der accounts.csv auslesen und dann zur Auswahl anbieten.
    cat "$ACCOUNTFILE" | while IFS= read config; 
    do 
        cfgName=$(echo $config|cut -d',' -f1)
        cfgMail=$(echo $config|cut -d',' -f2)
        cfgHost=$(echo $config|cut -d',' -f3)
        cfgPubKey=$(echo $config|cut -d',' -f4)
        echo "Connect $cfgName VPN | shell='...$0' param1=connect param2=$cfgMail param3=$cfgHost param4=$cfgPubKey terminal=false refresh=true"
    done

    if [[ $SHOW_SETTINGS == "ON" ]]; then
        echo "---"
        echo "Settings"
        echo "--$SETTINGSFILE"
        echo "--Farbige Icons aus"
        echo "--Tunnelblick Icons aus"
        echo "--Neuen User anlegen| bash=$0 param1=newuser terminal=true refresh=true"
    fi
    exit
fi

#if [ -f $OC_PIDFILE ]; then