Dart Requires Chilkat v11.0.0+

Everyware API RSA Encrypt JSON

See more RSA Examples

Demonstrates how to RSA encrypt JSON using everyware.com's RSA public key. 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.

  // First build the JSON to be encrypted.
  final json = CkJsonObject();
  json.updateString('provider_key', 'USER GUID HERE');
  json.updateString('menu_item', 'payment');
  final dt = CkDateTime();
  dt.setFromCurrentSystemTime();
  json.updateString('date_time', dt.getAsUnixTimeStr(false));

  // This build JSON like the following:

  // {
  //     "provider_key": "USER GUID HERE",
  //     "menu_item": "payment",
  //     "date_time": "1588163411"
  // }

  // When we sign, we'll want to sign the most compact JSON possible
  json.emitCompact = true;

  // Everyware's RSA public key is at:  https://docs.everyware.com/docs/everyware-public-rsa-key
  final sb = CkStringBuilder();
  final bCrlf = true;
  sb.appendLine('-----BEGIN PUBLIC KEY-----', bCrlf);
  sb.appendLine('MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAxNbflxUSWQ3XJ1N9dAoh', bCrlf);
  sb.appendLine('k+uaiFsg3wkPi9LGS/mH8DtHBgZxKyz+oQBDtnDd9FDEo0ql7MMgCMsTAv27W5vk', bCrlf);
  sb.appendLine('Pu0rm6zhcTeYquWEuVCS7VtVsyTATr0Z9WhqNeZlIRurovJAXl2jRDX6QeY5dayC', bCrlf);
  sb.appendLine('ubwyG4lBWE4fCakGY6zlh+oaElK0rvblqjYoEg3dn4KPRCYGof8OFxLptHThD4cE', bCrlf);
  sb.appendLine('T30j+utVafhO0HRyJ4iR3Pigb4GXdWBtJEEEWddZJizMkjFQkyUAoYLOT8EJ2TW3', bCrlf);
  sb.appendLine('Tz8SvAuHBUEFcPWTSTMAG/bSp5wrYBTXaeEhx+wrYa60OruHuzgmhzKyQVuYlCNJ', bCrlf);
  sb.appendLine('HdbnassuIRjjSNo25o4AdSlWwpGfBZjAiyEInR+KGpHdhKTxSekJxiwiXUS0UfSG', bCrlf);
  sb.appendLine('prOpd5PzWaAR7DvjLsdmR9XffxvJCVxC735gLK7hDJKjCajDPHVDr8FSL8xMlrq0', bCrlf);
  sb.appendLine('nKxtsHeRl1yzoGrRr12+9MiQnHtpqROTNXcXdwe3v+Vh8V5k8v8oIrcgh1+/N7Bd', bCrlf);
  sb.appendLine('NiRsy1gFHBdu/he/KcDRT/9/acQFMPLQueGfZxUvU5As6pEONjtKX2MUg2fMF6Rc', bCrlf);
  sb.appendLine('sQVVrLzg0g7EcuHGfuPeKfD/716MvS8NU7rX+2soijCSQv/e18PJPMVDlcMXjnup', bCrlf);
  sb.appendLine('PPx1tStemesavFlj1okhS6UCAwEAAQ==', bCrlf);
  sb.appendLine('-----END PUBLIC KEY-----', bCrlf);

  final pubkey = CkPublicKey();
  try {
    pubkey.loadFromString(sb.getAsString());
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  final rsa = CkRsa();
  try {
    rsa.usePublicKey(pubkey);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  // We probably need a base64Url encoded encrypted key.
  // Using straight-up base64 would potenially include chars that are not URL safe (i.e. have special meanings in URLs)
  rsa.encodingMode = 'base64url';

  final encryptedJson = rsa.encryptStringENC(json.emit(), false);

  // Build the URL
  // Such as:  https://portal.everyware.com/Account/LoginMenu?data={Base64Url_encrypted_JSON}
  final sbUrl = CkStringBuilder();
  sbUrl.append('https://portal.everyware.com/Account/LoginMenu?data=');
  sbUrl.append(encryptedJson);

  print(sbUrl.getAsString());
}