mailexe.sh

#!/bin/bash

while getopts "de:" OPTION
do
	case $OPTION in
	d)
		# mailexe -d [original] [duplicate]
		#decoding
		base64 $2 > original
		base64 $3 > duplicate
		diff -ed original duplicate > diffed
		tail -n +2 diffed | head -n -1 > exe.64
		base64 -d exe.64 > output.exe
		rm original duplicate diffed exe.64
		echo "output.exe generated"
		;;
	e)
		# mailexe -e [exe file] [image file]
		#encoding
		base64 $3 > temp
		base64 $2 >> temp
		base64 -d temp > image.png
		rm temp
		echo "image.png has the exe file embedded"
		;;
	esac
	
done