#!/bin/bash # Author: F. Bischof (info@meer-web.nl) # Check for input file if [ -n "$2" ] then INPUT=$2 if [ ! -e "$INPUT" ]; then echo "Input file does not exist!" exit 2 fi else echo "Usage: ./crypter.sh -[e/d] [inputfile]"; exit 1 fi # Check if keys are set if [ ! -f ~/.crypter/.keys ] then mkdir -p ~/.crypter echo "KEYS=\"-des-ede3-cbc -pbkdf2\"" > ~/.crypter/.keys fi source ~/.crypter/.keys # Check method case "$1" in "-e") echo "Encrypting file ${INPUT}" OUTPUT="${INPUT}.crypto" openssl enc $KEYS -salt -in ${INPUT} -out ${OUTPUT}.temp base64 ${OUTPUT}.temp > ${OUTPUT} rm -f ${OUTPUT}.temp if [ "`stat ${OUTPUT} | grep Size | awk '{ print $2}'`" != 0 ] then # OK - safe to delete the original input file echo "OK - Deleting file ${INPUT}" rm -f ${INPUT} exit 0 else # NOK - remove empty output file echo "CRITICAL - Output file ${OUTPUT} is 0 bytes! Not removing the source file ${INPUT}" rm -f ${OUTPUT} exit 2 fi ;; "-d") echo "Decrypting file ${INPUT}"; OUTPUT="`echo $INPUT | sed 's/\.crypto//'`" #Tim of the last extension in future update" base64 -d ${INPUT} > ${INPUT}.temp openssl enc -d $KEYS -in ${INPUT}.temp -out ${OUTPUT} rm -f ${INPUT}.temp if [ "`stat ${OUTPUT} | grep Size | awk '{ print $2}'`" != 0 ] then # OK - safe to delete the original input file echo "OK - Deleting file ${INPUT}" rm -f ${INPUT} else # NOK - remove empty output file echo "CRITICAL - Output file ${OUTPUT} is 0 bytes! Not removing the source file ${INPUT}" rm -f ${OUTPUT} exit 2 fi exit 0 ;; *) echo "Usage: ./crypter.sh -[e/d] [inputfile]"; exit 1 ;; esac exit 3