require 'openssl'
require 'base64'
require 'uri'

class AESEncDec {
	cipher = OpenSSL::Cipher::Cipher.new("aes-256-cbc")

	def initialize

	end

	def self.export_key 
		ENV['aes_key']  = cipher.key = cipher.random_key # stores the key in key, and also sets the generated key on the cipher
		ENV['aes_iv']  = cipher.iv = cipher.random_iv # stores the iv in iv, and also sets the generated iv on the cipher
	end

	def self.encrypt(data)
		cipher.encrypt
		cipher.key = ENV["aes_key"]
		cipher.iv = ENV["aes_iv"]
		encrypted = cipher.update(data) + cipher.final
		encrypted = Base64.urlsafe_encode64(encrypted)
		return encrypted
	end

	def self.decrypt(data) 
		cipher.decrypt
		cipher.key = ENV["aes_key"]
		cipher.iv = ENV["aes_iv"]

		# Start the decryption
		decoded = Base64.urlsafe_decode64(data)
		decrypted = cipher.update(decoded) + cipher.final
	end
}