Dart

Generate TOTP using Base32 Secret (6 Digits, Time-based, 30-second period)

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Generates a 6-digit time-based TOTP code using a base32 secret with a 30-second time period. Dart

import 'package:chilkat/chilkat.dart';

void main() {
  // This example requires the Chilkat API to have been previously unlocked.
  // See Global Unlock Sample for sample code.
  // 
  final crypt = CkCrypt2();

  // Base32 secret key:
  final secretKey = 'oebf ytfl qmzb p4xd 2ztf zyz4 hjrw 3uyo';

  final sbKey = CkStringBuilder();
  sbKey.append(secretKey);

  // Remove SPACE chars.
  final numRemoved = sbKey.replace(' ', '');

  // Note: A new token is generated every 30 seconds.  You must generate within the same 30 second interval to get the same result.

  // Generate 6 digits.
  final numDigits = 6;
  // 30 second time period.
  final timePeriod = 30;
  print('Your token is: ${crypt.totp(sbKey.getAsString(), 'base32', '0', '', timePeriod, numDigits, -1, 'sha1')}');
}