crypter y decrypter base64

#!/bin/bash
#crypter
read -p "palabra a encryptar: " crypt

echo "$crypt" | base64

#!/bin/bash

#decrypter
read -r -p "palabra a desencryptar: " auth

decrypt=$(echo "$auth" | openssl enc -d -base64)

echo "$decrypt"

text2base64=$(echo Hi! | base64)
base642text=$(echo $text2base64 | base64 -d)
echo "Codificado: $text2base64"
echo "Descodificado: $base642text"