public enum CertTypePublic Enumeration CertTypepublic enum class CertTypetype CertType| None | 0 | None |
| Pkix | 1 | X.509 as per PKIX Defined in RFC 4398. |
| Spki | 2 | SPKI certificate Defined in RFC 4398. |
| Pgp | 3 | OpenPGP packet Defined in RFC 4398. |
| IPkix | 4 | The URL of an X.509 data object Defined in RFC 4398. |
| ISpki | 5 | The URL of an SPKI certificate Defined in RFC 4398. |
| IPgp | 6 | The fingerprint and URL of an OpenPGP packet Defined in RFC 4398. |
| Acpkix | 7 | Attribute Certificate Defined in RFC 4398. |
| IAcpkix | 8 | The URL of an Attribute Certificate Defined in RFC 4398. |
| Uri | 253 | URI private Defined in RFC 4398. |
| Oid | 254 | OID private Defined in RFC 4398. |