Encrypt and decrypt dada using AES in rails

rails_aes_crypto.rb

def aes_encrypt(key, data)
  aes = OpenSSL::Cipher.new('AES-256-CBC')
  aes.encrypt
  aes.key = Digest::SHA256.digest(key)
  aes.update(data) + aes.final
end

def aes_decrypt(key, encrypted_data)
  aes = OpenSSL::Cipher.new('AES-256-CBC')
  aes.decrypt
  aes.key = Digest::SHA256.digest(key)
  aes.update(encrypted_data) + aes.final
end