crypt-editor uses mcrypt to encrypt and decrypt text enabling

crypt-editor.sh

#!/bin/bash
usage()
{
cat <<EOF
Usage $0:
crypt-editor -help
crypt-editor [filename]
crypt-editor [editor] [filename]
crypt-editor [-k key] [filename]
crypt-editor [-k key] [editor] [filename]
EOF
}
while getopts "hk:" OPTION
do
	case $OPTION in
	h)
		usage
		exit 0
		;;
	k)
		pass=$OPTARG
		editor=$3
		file=$4
		;;
	esac
done

# take password
if [ -z $pass ]
then 
	echo -n "Passphrase: "
	stty -echo
	read pass
	editor=$1
	file=$2
fi

# set editor
# TODO bug: opening .nc file in another directory.
if [ ! `type -P $editor` ] || [ -f $editor ]
then
	echo "Setting editor as vi.."
	file=$editor
	editor="vi"
fi
# check for .nc extension
if [ `echo $file| grep ".*\.nc"` ]
then
	file=`expr "$file" : "\(.*\)\.nc"`
fi

# decrypt it
if [ -f $file.nc ]
then
	mcrypt -q -k $pass -d $file.nc

	# if password is invalid
	if [ $? -ne 0 ]
	then
		stty sane
		exit 1
	fi
fi

# open decrypted file
$editor $file

# encrypt it again
cat $file|mcrypt -q -k $pass >$file.nc

# remove temporary files
rm $file $file~ *$file.swp 2>/dev/null

stty sane