Ruby AES Encrypt using OpenSSL

crypt

require "openssl"
require 'base64'

KEY = "***************************************"
ALGORITHM = "AES-256-ECB"

def self.encrypt(message, iv)
  cipher = OpenSSL::Cipher.new(ALGORITHM)
  cipher.encrypt()
  cipher.key = ENV["KEY"]
  cipher.iv =  iv
  crypt = cipher.update(message) + cipher.final()
  crypt_string = (Base64.encode64(crypt))
end

def self.decrypt(message, iv)
  cipher = OpenSSL::Cipher.new(ALGORITHM)
  cipher.decrypt()
  cipher.key = ENV["KEY"]
  cipher.iv =  iv
  tempkey = Base64.decode64(message)
  cipher.update(tempkey) + cipher.final()
end