React Native Requires Chilkat v11.0.0+

RSA Encrypt Randomly Generated AES Key

See more RSA Examples

Demonstrates how to RSA encrypt a randomly generated AES key. React Native

import { BinData, Cert, Prng, PublicKey, Rsa } from '@chilkat/react-native'

function chilkatExample() {
  // This example requires the Chilkat API to have been previously unlocked.
  // See Global Unlock Sample for sample code.

  // First generate a 256-bit AES key (32 bytes).
  const prng = new Prng();
  const bdAesKey = new BinData();
  prng.genRandomBd(32, bdAesKey);

  // Use a public key from a certificate for RSA encryption.
  const cert = new Cert();

  try {
    cert.loadFromFile('qa_data/pem/mf_public_rsa.pem');
  } catch {
    console.log(cert.lastErrorText);
    return;
  }

  const pubKey = new PublicKey();
  cert.getPublicKey(pubKey);

  const rsa = new Rsa();
  try {
    rsa.usePublicKey(pubKey);
  } catch {
    console.log(rsa.lastErrorText);
    return;
  }

  // RSA encrypt our 32-byte AES key.
  // The contents of bdAesKey are replaced with result of the RSA encryption.
  try {
    rsa.encryptBd(bdAesKey, false);
  } catch {
    console.log(rsa.lastErrorText);
    return;
  }

  // Return the result as a base64 string
  const encryptedAesKey = bdAesKey.getEncoded('base64');

  console.log(`encrypted AES key = ${encryptedAesKey}`);
}