USERNAME=${1:?username?}

SERVICE=${2:?service?}

KEYFILE=${3}

if [ ! $KEYFILE ]; then

echo "Using default key file"

KEYFILE=~/password_keyfile

if [ ! -e $KEYFILE ]; then

echo "Key file ($KEYFILE) does not exist."

echo -n "Do you wish to generate it? [y/N] ";

read GENFILE

echo

if [[ $GENFILE == y* || $GENFILE == Y* ]]; then

echo "Generating key file"

dd if=/dev/urandom of=$KEYFILE bs=100 count=104857

else

echo "Exiting"

exit

fi

echo

read -s -p "Enter Passphrase " PASSPHRASE

KNOW=`echo "$PASSPHRASE:$USERNAME@$SERVICE" | md5sum | od | head -n 1 `

SKIP=`echo $KNOW | cut -b 9-14`

COUNT=`echo $KNOW | cut -b 16-21`

echo -n "Your password is: "

BASE=`dd if=$KEYFILE bs=100 skip=$SKIP count=$COUNT 2>/dev/null | sha512sum `

echo $BASE | cut -b 1-10

[ -e ~/Dropbox/services.txt ] && echo "$USERNAME $SERVICE" >> ~/Dropbox/services.txt

sleep 10

clear