encrypt.rb

require 'openssl'
require 'base64'

aes = OpenSSL::Cipher.new("AES-256-CBC")
aes.encrypt
aes.key = Base64.decode64("4VZS/oCY73fTENgF8LyLq00B+bsXEHLlAFpRhoDXTKc=")
aes.iv = OpenSSL::Cipher.new("AES-256-CBC").random_iv

cipher = aes.update("I'm scared if I stop all at once, the cumulative hangover will literally kill me.")
cipher << aes.final

Base64.encode64(cipher)
# "Xfu+6jKYygwB6GlIj6zqL+Q0r3zBMo/zoAtTapREjFOCqb3+oaySCxx4Y8fV\nDg7OfUL0YBSAXzPkbV7qpqViVBcjfX9phao16CCxOObFGTXrXGgEmdxwvO85\ngESN/r/d\n"