secureRandom function Null safety

FortunaRandom secureRandom()

Implementation

FortunaRandom secureRandom() {
  var secureRandom = FortunaRandom();
  var random = Random.secure();
  final seeds = <int>[];
  for (int i = 0; i < 32; i++) {
    seeds.add(random.nextInt(255));
  }
  secureRandom.seed(KeyParameter(Uint8List.fromList(seeds)));
  return secureRandom;
}