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# frozen_string_literal: false
#--
# = 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 licensed under the same licence as Ruby.
# (See the file 'LICENCE'.)
#++
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.downcase)
}
}
const_set(name, klass)
}
%w(128 192 256).each{|keylen|
klass = Class.new(Cipher){
define_method(:initialize){|mode = "CBC"|
super("aes-#{keylen}-#{mode}".downcase)
}
}
const_set("AES#{keylen}", klass)
}
# call-seq:
# cipher.random_key -> key
#
# Generate a random key with OpenSSL::Random.random_bytes and sets it to
# the cipher, and returns it.
#
# You must call #encrypt or #decrypt before calling this method.
def random_key
str = OpenSSL::Random.random_bytes(self.key_len)
self.key = str
end
# call-seq:
# cipher.random_iv -> iv
#
# Generate a random IV with OpenSSL::Random.random_bytes and sets it to the
# cipher, and returns it.
#
# You must call #encrypt or #decrypt before calling this method.
def random_iv
str = OpenSSL::Random.random_bytes(self.iv_len)
self.iv = str
end
# Deprecated.
#
# This class is only provided for backwards compatibility.
# Use OpenSSL::Cipher.
class Cipher < Cipher; end
deprecate_constant :Cipher
end # Cipher
end # OpenSSL