`object
method extensions : (Netx509.oid * string * bool) list
method issuer : Netx509.directory_name
method issuer_unique_id : Netasn1.Value.bitstring_value option
method public_key : Netasn1.Value.bitstring_value
method public_key_algorithm : Netx509.oid * Netasn1.Value.value option
method serial_number : string
method signature : Netasn1.Value.bitstring_value
method signature_algorithm : Netx509.oid * Netasn1.Value.value option
method subject : Netx509.directory_name
method subject_unique_id : Netasn1.Value.bitstring_value option
method valid_not_after : float
method valid_not_before : float
method version : int
end`