Hash a Password with Argon2 (Defaults)

Demonstrates Crypt2.Argon2HashPassword, which hashes a password with Argon2 and returns a PHC-format string. Passing an empty options string uses all defaults, including a random salt.

import 'package:chilkat/chilkat.dart';

void main() {
  final crypt = CkCrypt2();

  // The password should come from a secure source rather than being hard-coded.
  final password = 'correct horse battery staple';

  // Hash the password using all defaults by passing an empty options string.  The defaults are
  // Argon2id, version 19, 3 iterations, 64 MB of memory, 1 lane, a 32-byte hash, and a 16-byte random
  // salt.  A random salt is generated automatically, which is what should normally happen.
  final String phcHash;
  try {
    phcHash = crypt.argon2HashPassword(password, '');
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  // The returned PHC-format string records the variant, version, cost parameters, salt, and hash --
  // everything needed to verify the password later.  Store the whole string.
  print(phcHash);
}