class Gem::Request

def self.configure_connection_for_https(connection, cert_files)
  raise Gem::Exception.new("OpenSSL is not available. Install OpenSSL and rebuild Ruby (preferred) or use non-HTTPS sources") unless Gem::HAVE_OPENSSL
  connection.use_ssl = true
  connection.verify_mode =
    Gem.configuration.ssl_verify_mode || OpenSSL::SSL::VERIFY_PEER
  store = OpenSSL::X509::Store.new
  if Gem.configuration.ssl_client_cert
    pem = File.read Gem.configuration.ssl_client_cert
    connection.cert = OpenSSL::X509::Certificate.new pem
    connection.key = OpenSSL::PKey::RSA.new pem
  end
  store.set_default_paths
  cert_files.each do |ssl_cert_file|
    store.add_file ssl_cert_file
  end
  if Gem.configuration.ssl_ca_cert
    if File.directory? Gem.configuration.ssl_ca_cert
      store.add_path Gem.configuration.ssl_ca_cert
    else
      store.add_file Gem.configuration.ssl_ca_cert
    end
  end
  connection.cert_store = store
  connection.verify_callback = proc do |preverify_ok, store_context|
    verify_certificate store_context unless preverify_ok
    preverify_ok
  end
  connection
end