This is a pure JS implementation of ECDSA features for eMRTD certificates (ICAO 9303 p.12) with explicit ECC parameters
bun add github:li0ard/ecdsa_icao
import { curveFromECParams } from "@li0ard/ecdsa_icao"
let certificate = new X509Certificate("./example.pem")
let curve = curveFromECParams(certificate).subjectPublicKeyInfo