Create a JWS into a StringBuilder

See more JSON Web Signatures (JWS) Examples

Demonstrates Jws.CreateJwsSb, which creates a JWS and writes it into a StringBuilder.

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

function chilkatExample() {
  const jws = new Jws();

  // Set the protected header for signer 0, specifying the signature algorithm (alg).
  const header = new JsonObject();
  header.updateString('alg', 'HS256');
  try {
    jws.setProtectedHeader(0, header);
  } catch {
    console.log(jws.lastErrorText);
    return;
  }

  // Set the payload to be signed.
  const bIncludeBom = false;
  try {
    jws.setPayload('This is the content to sign.', 'utf-8', bIncludeBom);
  } catch {
    console.log(jws.lastErrorText);
    return;
  }

  // Provide the HMAC key (base64) for signer 0.  In production, obtain the key from a secure source
  // rather than hard-coding it.
  const base64Key = 'YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4eXowMTIzNDU=';
  try {
    jws.setMacKey(0, base64Key, 'base64');
  } catch {
    console.log(jws.lastErrorText);
    return;
  }

  // Create the JWS and write it into a StringBuilder.
  const sbJws = new StringBuilder();
  try {
    jws.createJwsSb(sbJws);
  } catch {
    console.log(jws.lastErrorText);
    return;
  }

  console.log(sbJws.getAsString());
}