elliptic-jwk

This library is a wrapper around the elliptic curve cryptography library (indutny/elliptic) and provides support for working with JSON Web Keys (JWKs).

Installation

You can install the library using npm:

npm install elliptic-jwk

Usage

To use the library, you first need to import it into your project:

import { toPrivateJwk, publicJwkFromPrivate } from "elliptic-jwk";

toPrivateJwk(privateKey: string, curve: string): object

This function takes a hexadecimal string privateKey and the name of an elliptic curve curve as arguments, and returns a JWK representation of the private key.

Example:

const privateKey = '<hex string private key>';
const curve = "secp256k1";
const privateJwk = toPrivateJwk(privateKey, curve);
console.log(privateJwk);

Output:

{
    "kty": "EC",
    "d": "<base64 encoded string private key>",
    "crv": "secp256k1",
    "x": "<base64 encoded string x>",
    "y": "<base64 encoded string y>"
}

publicJwkFromPrivate(privateJwk: object): object

This function takes a JWK representation of a private key privateJwk as an argument, and returns a JWK representation of the corresponding public key.

Example:

const privateKey = '<hex string private key>';
const curve = "secp256k1";
const privateJwk = toPrivateJwk(privateKey, curve);
const publicKeyJwk = publicJwkFromPrivate(privateJwk);
console.log(publicKeyJwk);

Output:

{
    "kty": "EC",
    "crv": "secp256k1",
    "x": "<base64 encoded string x>",
    "y": "<base64 encoded string y>"
}