class Acme::Client::SelfSignCertificate

def generate_certificate
  certificate = OpenSSL::X509::Certificate.new
  certificate.not_before = not_before
  certificate.not_after = not_after
  Acme::Client::Util.set_public_key(certificate, private_key)
  certificate.version = 2
  certificate.serial = 1
  certificate
end