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=begin
= $RCSfile$ -- Ruby-space predefined Cipher subclasses
= Info
'OpenSSL for Ruby 2' project
Copyright (C) 2002 Michal Rokos <m.rokos@sh.cvut.cz>
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