STORAGE_LOCATION=~/.ssh
ROUNDS=250
ALGOS=(RSA  RSA  ECDSA ECDSA ECDSA ED25519 )
SIZES=(2048 4096  256   384   521    256   )

echo "Enter the email you want to generate keys with and press [ENTER]: "
read EMAIL
echo "Enter the password you want to secure the keys with and press [ENTER] (empty for no password): "
read -s PASSWORD

for i in "${!ALGOS[@]}"; do
  ALGO="${ALGOS[$i]}"
  SIZE="${SIZES[$i]}"
  echo "Generating ${ALGO}-${SIZE} key..."
  FINGERPRINT=$(ssh-keygen -t "${ALGO}" -b "${SIZE}" -C "${EMAIL}" -N "${PASSWORD}" -o -a "${ROUNDS}" -f "${STORAGE_LOCATION}/${EMAIL}.${ALGO}-${SIZE}" | grep "SHA256:")
  echo "Key Fingerprint: ${FINGERPRINT}"
done

echo "Done!"