default:
				return errors.New("x509: cannot parse IP address of length " + strconv.Itoa(len(data)))
			}
		}

		return nil
	})

	return
}

func parseAuthorityKeyIdentifier(e pkix.Extension) ([]byte, error) {
	// RFC 5280, Section 4.2.1.1
	if e.Critical {
		// Conforming CAs MUST mark this extension as non-critical