class ActiveSupport::LegacyKeyGenerator

:nodoc:

def ensure_secret_secure(secret)

secret they've provided is at least 30 characters in length.
To prevent users from using something insecure like "Password" we make sure that the 
def ensure_secret_secure(secret)
  if secret.blank?
    raise ArgumentError, "A secret is required to generate an integrity hash " \
      "for cookie session data. Set a secret_key_base of at least " \
      "#{SECRET_MIN_LENGTH} characters in config/secrets.yml."
  end
  if secret.length < SECRET_MIN_LENGTH
    raise ArgumentError, "Secret should be something secure, " \
      "like \"#{SecureRandom.hex(16)}\". The value you " \
      "provided, \"#{secret}\", is shorter than the minimum length " \
      "of #{SECRET_MIN_LENGTH} characters."
  end
end

def generate_key(salt) 

def generate_key(salt)
  @secret
end

def initialize(secret) 

def initialize(secret)
  ensure_secret_secure(secret)
  @secret = secret
end