module Twofish::Mode

Encryption modes.

The only currently implemented modes are ECB (Electronic Code Book) and CBC (Cipher Block Chaining).

Constants

ALL: Array of all known modes.
CBC: Cipher block chaining mode.
DEFAULT: Default mode (ECB).
ECB: Electronic code book mode.

Public Class Methods

validate(mode) click to toggle source

Takes a string or symbol and returns the lowercased symbol representation if this is a recognized mode. Otherwise, throws ArgumentError.

# File lib/twofish/mode.rb, line 24
def self.validate(mode)
  mode_sym = mode.nil? ? DEFAULT : mode.to_s.downcase.to_sym
  raise ArgumentError, "unknown cipher mode #{mode.inspect}" unless ALL.include? mode_sym
  mode_sym
end