facet-asn1

ASN.1 DER/BER serialization and deserialization for facet.

This crate provides ASN.1 DER (Distinguished Encoding Rules) support via the FormatParser and FormatSerializer traits.

ASN.1 Overview

ASN.1 (Abstract Syntax Notation One) is a standard interface description language for defining data structures that can be serialized and deserialized in a cross-platform way. DER is a specific encoding rule that ensures canonical encoding.

Serialization

use facet::Facet;
use facet_asn1::to_vec;

#[derive(Facet)]
struct Point { x: i32, y: i32 }

let point = Point { x: 10, y: 20 };
let bytes = to_vec(&point).unwrap();

Deserialization

use facet::Facet;
use facet_asn1::from_slice;

#[derive(Facet)]
struct Point { x: i32, y: i32 }

// DER encoding of Point { x: 10, y: 20 }
let bytes = &[0x30, 0x06, 0x02, 0x01, 0x0A, 0x02, 0x01, 0x14];
let point: Point = from_slice(bytes).unwrap();

Type Mapping