# File lib/chef-config/config.rb, line 1131
    def self.enable_fips_mode
      OpenSSL.fips_mode = true
      require "digest"
      require "digest/sha1"
      require "digest/md5"
      # Remove pre-existing constants if they do exist to reduce the
      # amount of log spam and warnings.
      Digest.send(:remove_const, "SHA1") if Digest.const_defined?("SHA1")
      Digest.const_set("SHA1", OpenSSL::Digest::SHA1)
      OpenSSL::Digest.send(:remove_const, "MD5") if OpenSSL::Digest.const_defined?("MD5")
      OpenSSL::Digest.const_set("MD5", Digest::MD5)
      ChefConfig.logger.debug "FIPS mode is enabled."
    end