@hazae41/asn1

npm i @hazae41/asn1

Node Package

Features

Current features

• 100% TypeScript and ESM
• No external dependency
• Rust-like patterns
• Zero-copy DER <=> ASN1 reading and writing
• Almost all universal triplets
• Implicit and explicit tagged types

Upcoming features

• More string types
• More encodings

Usage

import { DER } from "@hazae41/asn1"

const input = new Uint8Array([0x01, 0x01, 0xFF])

const triplet = DER.tryFromBytes(input).unwrap() // Boolean

console.log(triplet.toString()) // "BOOLEAN true"

const output = DER.tryToBytes(triplet).unwrap() // Uint8Array([0x01, 0x01, 0xFF])