React Native

Export a Private Key as a JWK

Demonstrates the Chilkat PrivateKey.GetJwk method, which exports the key as a compact JWK (JSON Web Key). It takes no arguments; binary values use Base64url without padding.

Note: The file paths are relative to the application's current working directory. Absolute paths may also be used. Supply the paths appropriate to your own environment.

Background: JWK is the JSON key format used across modern web security — JWT, OAuth, OpenID Connect. Exporting to it lets you publish a key into a JWK Set or hand it to a web framework that speaks JWK. Note this is the private JWK: it includes the private parameters (d and, for RSA, the CRT values), so it is highly sensitive — publish only the public JWK derived from ToPublicKey when sharing.

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React Native

import { PrivateKey } from '@chilkat/react-native'

function chilkatExample() {
  // Load a private key to export.
  const privKey = new PrivateKey();
  try {
    privKey.loadPemFile('qa_data/private.pem');
  } catch {
    console.log(privKey.lastErrorText);
    return;
  }

  // Export as a compact JWK (JSON Web Key).  Binary values use Base64url without padding.
  let jwk: string;
  try {
    jwk = privKey.getJwk();
  } catch {
    console.log(privKey.lastErrorText);
    return;
  }

  console.log(jwk);
}