#
# Copyright:: Copyright 2009-2018, Chef Software Inc.
# License:: Apache License, Version 2.0
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#

require "chef/resource"

class Chef
  class Resource
    # a resource for generating dhparam.pem files.
    # If a valid dhparam.pem file is found at the specified location, no new
    # file will be created. If a file is found at the specified location but it
    # is not a valid dhparam file, it will be overwritten.
    #
    # @since 14.0
    class OpensslDhparam < Chef::Resource
      require "chef/mixin/openssl_helper"
      include Chef::Mixin::OpenSSLHelper

      resource_name :openssl_dhparam

      property :path,        String, name_property: true
      property :key_length,  equal_to: [1024, 2048, 4096, 8192], default: 2048
      property :generator,   equal_to: [2, 5], default: 2
      property :owner,       [String, nil]
      property :group,       [String, nil]
      property :mode,        [Integer, String], default: "0640"

      action :create do
        unless dhparam_pem_valid?(new_resource.path)
          converge_by("Create a dhparam file #{new_resource.path}") do
            dhparam_content = gen_dhparam(new_resource.key_length, new_resource.generator).to_pem

            declare_resource(:file, new_resource.path) do
              action :create
              owner new_resource.owner unless new_resource.owner.nil?
              group new_resource.group unless new_resource.group.nil?
              mode new_resource.mode
              sensitive true
              content dhparam_content
            end
          end
        end
      end
    end
  end
end