allowUnknownUsages bool
	// allow duplicate usages values
	allowDuplicateUsages bool
}

// validateCSR validates the signature and formatting of a base64-wrapped,
// PEM-encoded PKCS#10 certificate signing request. If this is invalid, we must
// not accept the CSR for further processing.
func validateCSR(obj *certificates.CertificateSigningRequest) error {
	csr, err := certificates.ParseCSR(obj.Spec.Request)
	if err != nil {