Dart Requires Chilkat v11.0.0+

Generate a Random 256-bit AES Key and RSA Encrypt

See more RSA Examples

Generates a random 256-bit AES key and encrypts using an RSA public key. Only the owner of the RSA private key will be able to decrypt the AES key. Dart

import 'package:chilkat/chilkat.dart';

void main() {
  // The RSA public key is used for encryption, and the private key for decryption.

  // The public key's role is to make encryption accessible to anyone while ensuring that
  // only the private key holder can decrypt the messages.
  // The public key is designed to be widely distributed so anyone can use it to encrypt messages
  // intended for the owner of the private key.

  // Load our 2048-bit RSA public key.
  final pubKey = CkPublicKey();
  // In all Chilkat methods expecting a path, you pass either absolute or relative paths.
  try {
    pubKey.loadFromFile('rsaKeys/Test2048Rsa.pem');
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  final rsa = CkRsa();

  // Tell RSA to use the public key.
  rsa.usePublicKey(pubKey);

  // Generate a random 256-bit AES key (32 bytes)
  final bdAesKey = CkBinData();
  final prng = CkPrng();
  prng.genRandomBd(32, bdAesKey);

  // RSA encrypt.
  rsa.encryptBd(bdAesKey, false);

  // Save the RSA encrypted AES key to a file.
  bdAesKey.writeFile('rsaEncrypted/myAes.key');
}