1# frozen_string_literal: true
 2
 3require 'xml/kit/templatable'
 4
 5module Xml
 6  module Kit
 7    # An implementation of the EncryptedKey element.
 8    # https://www.w3.org/TR/xmlenc-core1/#sec-EncryptedKey
 9    #
10    # @since 0.3.0
11    class EncryptedKey
12      include ::Xml::Kit::Templatable
13      attr_reader :id
14      attr_reader :asymmetric_cipher, :symmetric_cipher
15      attr_accessor :key_info
16
17      def initialize(id: Id.generate,
18                     asymmetric_cipher: nil,
19                     symmetric_cipher: nil,
20                     key_info: nil)
21        @id = id
22        @asymmetric_cipher = asymmetric_cipher ||
23          key_info.try(:asymmetric_cipher)
24        @symmetric_cipher = symmetric_cipher ||
25          key_info.try(:symmetric_cipher) ||
26          Xml::Kit::Crypto::SymmetricCipher.new
27        @key_info = key_info
28      end
29
30      def cipher_value
31        Base64.strict_encode64(asymmetric_cipher.encrypt(symmetric_cipher.key))
32      end
33    end
34  end
35end