| 鏈表順序 | plugin | cred_encoder_t | cred_encoding_type_t |
| 4 | pksc1 | pkcs1_encoder_encode | KEYID_PUBKEY_INFO_SHA1 KEYID_PUBKEY_SHA1 PUBKEY_ASN1_DER PUBKEY_SPKI_ASN1_DER PUBKEY_RSA_MODULUS PRIVKEY_ASN1_DER |
| 3 | pgp | pgp_encoder_encode | KEYID_PGPV3 |
| 2 | dnskey | dnskey_encoder_encode | PUBKEY_DNSKEY |
| 1 | sshkey | sshkey_encoder_encode | PUBKEY_SSHKEY |
| 0 | pem | pem_encoder_encode | PUBKEY_PEM PRIVKEY_PEM CERT_PEM |
| 鏈表順序 | plugin | cert_validator_t | |
| 1 | revocation | revocation_validator_t | |
| 0 | constraints | constraints_validator_t |
