module ChefConfig

def self.fips?
  if ChefConfig.windows?
    begin
      require "win32/registry"
    rescue LoadError
      return false
    end
    # from http://msdn.microsoft.com/en-us/library/windows/desktop/aa384129(v=vs.85).aspx
    reg_type =
      case ::RbConfig::CONFIG["target_cpu"]
      when "i386"
        Win32::Registry::KEY_READ | 0x100
      when "x86_64"
        Win32::Registry::KEY_READ | 0x200
      else
        Win32::Registry::KEY_READ
      end
    begin
      Win32::Registry::HKEY_LOCAL_MACHINE.open('System\CurrentControlSet\Control\Lsa\FIPSAlgorithmPolicy', reg_type) do |policy|
        policy["Enabled"] != 0
      end
    rescue Win32::Registry::Error
      false
    end
  else
    fips_path = "/proc/sys/crypto/fips_enabled"
    File.exist?(fips_path) && File.read(fips_path).chomp != "0"
  end
end

def self.logger
  @logger
end

def self.logger=(new_logger)
  @logger = new_logger
end

def self.windows?
  if RUBY_PLATFORM =~ /mswin|mingw|windows/
    true
  else
    false
  end
end