asn1_encode_sequence_of_external_principal_identifier
asn1_addfield((const krb5_external_principal_identifier **)val->trustedCertifiers,1,asn1_encode_sequence_of_external_principal_identifier);
retval = asn1_encode_sequence_of_external_principal_identifier(buf, val, &length);
asn1_error_code asn1_encode_sequence_of_external_principal_identifier