Dart Requires Chilkat v11.0.0+

Generate an RSA Key and Get as Base64 DER

See more RSA Examples

Demonstrates how to generate a 2048-bit RSA key and return the public and private parts as unencrypted Base64 encoded DER. Dart

import 'package:chilkat/chilkat.dart';

void main() {
  // This example assumes the Chilkat API to have been previously unlocked.
  // See Global Unlock Sample for sample code.

  final rsa = CkRsa();

  // Generate a 2048-bit key.
  final privKey = CkPrivateKey();
  try {
    rsa.genKey(2048, privKey);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  // Get the public part of the key.
  final pubKey = CkPublicKey();
  privKey.toPublicKey(pubKey);

  // There are two possible formats for representing the RSA public key 
  // in ASN.1 (DER).  The possible formats are PKCS1 and PKCS8.
  // We can get either by setting bChoosePkcs1 to true or false.
  final bChoosePkcs1 = true;
  final pubKeyBase64Der = pubKey.getEncoded(bChoosePkcs1, 'base64');
  print('Public Key Base64 DER:');
  print(pubKeyBase64Der);

  // Get the private key as Base64 DER:
  // We can get PKCS1 or PKCS8, but with different methods:
  final privKeyPkcs1 = privKey.getPkcs1ENC('base64');
  print('Private Key PKCS1 Base64 DER:');
  print(privKeyPkcs1);

  final privKeyPkcs8 = privKey.getPkcs8ENC('base64');
  print('Private Key PKCS8 Base64 DER:');
  print(privKeyPkcs8);
}