React Native Requires Chilkat v11.0.0+

Load JWK into PublicKey Object

See more JSON Web Signatures (JWS) Examples

Demonstrates how to load a Java Web Key (JWK) into a Chilkat public key object. React Native

import { JsonObject, PublicKey, StringBuilder } from '@chilkat/react-native'

function chilkatExample() {
  // Imagine we have this JWK:

  // {
  // "kty":"RSA",
  // "kid":"bilbo.baggins@hobbiton.example",
  // "use":"sig",
  // "n":"26381066103266289976070039679240841999340706859156341823971393693544846472963839705790075117105560154606562987481050889935247188300178764426769543782451174831475924241862817098997865881169498995546309260357488285676768114714548754913374731868063116787903918383610614912211576698081222844057810710088656983077876282582286966085572172471849443305250452393766960762340311496052418952315081937000716222751229644449475751932222180738210988190709824209639002026650048655399108647971010890335494074025258268035713167380057822555485524738518699437692145859633592396626258745090144803752145540471688039673495588314804430463791",
  // "e":"65537"
  // }
  // 

  const sbJwk = new StringBuilder();
  try {
    sbJwk.loadFile('qa_data/jwk/simple_jwk_rsa.json', 'utf-8');
  } catch {
    console.log('Failed to load simple JWK file.');
    return;
  }

  // Loading it into a Chilkat public key object is easy:
  const pubkey = new PublicKey();
  try {
    pubkey.loadFromString(sbJwk.getAsString());
  } catch {
    console.log(pubkey.lastErrorText);
    return;
  }

  console.log('Simple JWK loaded into public key object.');

  // ----------------------------------------------------------------------------------------------------------
  // Demonstrate how to load a JWK that is contained within JSON into a public key object.

  // {
  //   "alg":"RS256",
  //   "jwk":  {
  //           "kty":"RSA",
  //           "kid":"bilbo.baggins@hobbiton.example",
  //           "use":"sig",
  //           "n":"26381066103266289976070039679240841999340706859156341823971393693544846472963839705790075117105560154606562987481050889935247188300178764426769543782451174831475924241862817098997865881169498995546309260357488285676768114714548754913374731868063116787903918383610614912211576698081222844057810710088656983077876282582286966085572172471849443305250452393766960762340311496052418952315081937000716222751229644449475751932222180738210988190709824209639002026650048655399108647971010890335494074025258268035713167380057822555485524738518699437692145859633592396626258745090144803752145540471688039673495588314804430463791",
  //           "e":"65537"
  //           }
  // }

  const sbJwk2 = new StringBuilder();
  try {
    sbJwk2.loadFile('qa_data/jwk/contained_jwk_rsa.json', 'utf-8');
  } catch {
    console.log(sbJwk2.lastErrorText);
    return;
  }

  // Get the "jwk" part of the JSON..
  const json = new JsonObject();
  json.load(sbJwk2.getAsString());

  const jsonJwk = new JsonObject();
  try {
    json.objectOf2('jwk', jsonJwk);
  } catch {
    console.log(json.lastErrorText);
    return;
  }

  const pubkey2 = new PublicKey();
  try {
    pubkey2.loadFromString(jsonJwk.emit());
  } catch {
    console.log(pubkey2.lastErrorText);
    return;
  }

  console.log('Contained JWK loaded into public key object.');
}