home_bin/bash/AESDEC

#!/bin/bash

if [ -z "$1" ]; then
	echo "Usage: $0 file_to_decrypt.aes [another_file_to_decrypt.aes]*"
	exit 1
fi

# TODO, use mktemp and -pass file:/tmp/tempfile to pass the password
read -ersp "Enter password: " P
echo

while [ ! -z "$1" ]; do
	INFILE="$1"
	OUTFILE="${1%.aes}"

	if [ "$INFILE" = "$OUTFILE" ]; then
		echo "The input file does not end with .aes"
		shift
		continue
	fi

	if [ -e "$OUTFILE" ]; then
		echo "$OUTFILE exists, will not overwrite"
		shift
		continue
	fi

	if [ ! -f "$INFILE" ]; then
		echo "$INFILE does not exist, can not decrypt"
		shift
		continue
	fi

	echo "Processing $INFILE..."
	if which bar > /dev/null 2>&1; then
		bar -dan -if "$INFILE" | openssl enc -d -aes-256-cbc -salt -pass pass:"$P" > "$OUTFILE"
	else
		echo -n "Please wait..."
		openssl enc -d -aes-256-cbc -salt -pass pass:"$P" < "$INFILE" > "$OUTFILE"
		echo " done."
	fi

	shift
done