processBlock method

int processBlock(
  1. List<int?> M,
  2. int offset
)
override

Implementation

int processBlock(List<int?> M, int offset) {
  var des1 = new DESEngine();
  var des2 = new DESEngine();
  var des3 = new DESEngine();
  if (forEncryption == true) {
    des1.init(true, key!.sublist(0, 2));
    des1.processBlock(M, offset);
    des2.init(false, key!.sublist(2, 4));
    des2.processBlock(M, offset);
    des3.init(true, key!.sublist(4, 6));
    des3.processBlock(M, offset);
  } else {
    des3.init(false, key!.sublist(4, 6));
    des3.processBlock(M, offset);
    des2.init(true, key!.sublist(2, 4));
    des2.processBlock(M, offset);
    des1.init(false, key!.sublist(0, 2));
    des1.processBlock(M, offset);
  }
  return blockSize;
}