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#--
#
# $RCSfile$
#
# = 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 36895 2012-09-04 00:57:31Z nobu $
#
#++
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::Cipher in the future.
class Cipher < Cipher
# add warning
end
end # Cipher
end # OpenSSL