generateAsymmetricJWK.ts

import { generateKeyPair } from "jose/key/generate/keypair";
import { exportJWK } from "jose/key/export";
import { JWK } from "jose";

async function generateKey() {
  const keyId = globalThis?.crypto.randomUUID();
  const algorithm = "EdDSA"; // Some example asymmetric algorithms
  const key = await generateKeyPair(algorithm, { extractable: true });

  const exportedPrivate = await exportJWK(key.privateKey);
  if (!exportedPrivate.kty) throw new Error(`missing kty`);
  const jwkPrivate: JWK = {
    ...exportedPrivate,
    kid: keyId,
    alg: algorithm,
  };
  const exportedPublic = await exportJWK(key.publicKey);
  if (!exportedPublic.kty) throw new Error(`missing kty`);
  const jwkPublic: JWK = {
    ...exportedPublic,
    kid: keyId,
    alg: algorithm,
  };
  return {
    jwkPrivateString: JSON.stringify(jwkPrivate),
    jwkPublicString: JSON.stringify(jwkPublic),
  };
}

const { jwkPrivateString, jwkPublicString } = await generateKey();
console.log(jwkPrivateString);
console.log(jwkPublicString);