=begin = $RCSfile$ -- Ruby-space predefined Cipher subclasses = Info 'OpenSSL for Ruby 2' project Copyright (C) 2002 Michal Rokos All rights reserved. = Licence This program is licenced under the same licence as Ruby. (See the file 'LICENCE'.) = Version $Id: cipher.rb 12496 2007-06-08 15:02:04Z technorama $ =end ## # Should we care what if somebody require this file directly? #require 'openssl' module OpenSSL class Cipher %w(AES CAST5 BF DES IDEA RC2 RC4 RC5).each{|name| klass = Class.new(Cipher){ define_method(:initialize){|*args| cipher_name = args.inject(name){|n, arg| "#{n}-#{arg}" } super(cipher_name) } } const_set(name, klass) } %w(128 192 256).each{|keylen| klass = Class.new(Cipher){ define_method(:initialize){|mode| mode ||= "CBC" cipher_name = "AES-#{keylen}-#{mode}" super(cipher_name) } } const_set("AES#{keylen}", klass) } # Generate, set, and return a random key. # You must call cipher.encrypt or cipher.decrypt before calling this method. def random_key str = OpenSSL::Random.random_bytes(self.key_len) self.key = str return str end # Generate, set, and return a random iv. # You must call cipher.encrypt or cipher.decrypt before calling this method. def random_iv str = OpenSSL::Random.random_bytes(self.iv_len) self.iv = str return str end # This class is only provided for backwards compatibility. Use OpenSSL::Digest in the future. class Cipher < Cipher # add warning end end # Cipher end # OpenSSL