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. Use " +
      "config.secret_key_base = \"some secret phrase of at " +
      "least #{SECRET_MIN_LENGTH} characters\"" +
      "in config/initializers/secret_token.rb"
  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