Encrypt Content to a JWE

See more JSON Web Encryption (JWE) Examples

Demonstrates Jwe.Encrypt, which encrypts a string and returns the resulting JWE. The charset argument converts the text to bytes before encryption.

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

function chilkatExample() {
  const jwe = new Jwe();

  // Set the JWE protected header, specifying the key-management algorithm (alg) and the content-
  // encryption algorithm (enc).
  const header = new JsonObject();
  header.updateString('alg', 'A256KW');
  header.updateString('enc', 'A256GCM');
  try {
    jwe.setProtectedHeader(header);
  } catch {
    console.log(jwe.lastErrorText);
    return;
  }

  // The 256-bit key-wrapping key (base64) for recipient index 0.  In production, obtain the key
  // from a secure source rather than hard-coding it.
  const base64Key = 'YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4eXowMTIzNDU=';
  try {
    jwe.setWrappingKey(0, base64Key, 'base64');
  } catch {
    console.log(jwe.lastErrorText);
    return;
  }

  // Encrypt the content.  The 2nd argument is the charset used to convert the text to bytes.  The
  // returned string is the JWE (compact serialization by default).
  let jweCompact: string;
  try {
    jweCompact = jwe.encrypt('This is the secret content.', 'utf-8');
  } catch {
    console.log(jwe.lastErrorText);
    return;
  }

  console.log(jweCompact);
}