#!/bin/bash

# -----------------------------------------------------------------------------
# Decompress and decrypt a specified file
# -----------------------------------------------------------------------------

infname="$1"
kfile="$2"

if [ -z "$kfile" ]; then
	echo "Error must specify text and keyfile" 1>&2
	exit 1
fi

if [ 0 -eq 0 ]; then

	zipfname=${infname%.*}
	rm $zipfname

	echo "Writing to $zipfname"
	cat $infname | base64 -d > $zipfname

	first_inner_zip_fname=$(unzip -l $zipfname | head -n 4 | tail -n 1 | awk '{print $4}')
	if [ -e $first_inner_zip_fname ]; then
		rm $first_inner_zip_fname
	fi 

	unzip $zipfname

	echo "Decrypting $first_inner_zip_fname"
        /usr/bin/openssl enc -aes-256-cbc -d -in $first_inner_zip_fname -pass file:$kfile

else
	echo "Clearing"
	rm $infname.enc.zip $infname.enc $infname.enc.zip.b64
fi