CERTIFICATE_TYPE
CERTIFICATE_TYPE("PKIX", 1),
CERTIFICATE_TYPE("SPKI", 2),
CERTIFICATE_TYPE("PGP", 3),
CERTIFICATE_TYPE("IPKIX", 4),
CERTIFICATE_TYPE("ISPKI", 5),
CERTIFICATE_TYPE("IPGP", 6),
CERTIFICATE_TYPE("ACPKIX", 7),
CERTIFICATE_TYPE("IACPKIX", 8),
CERTIFICATE_TYPE("URI", 253),
CERTIFICATE_TYPE("OID", 254),