key = "#{CERT_PATH}/client_expired.key"
      crt = "#{CERT_PATH}/client_expired.crt"
      client_ctx.key = OpenSSL::PKey::RSA.new File.read(key)
      client_ctx.cert = OpenSSL::X509::Certificate.new File.read(crt)
      client_ctx.ca_file = "#{CERT_PATH}/ca.crt"