Ref<ByteArray> keyExpansion(ByteArray *key, int Nr)
{
if (Nr <= 0) Nr = numRounds(key->count() / 4);
Ref<ByteArray> w = ByteArray::create(Ns * (Nr + 1));
const int Nk = key->count() / 4;
int i = 0;
for (; i < Nk; ++i) {
w->wordAt(i) =
word(
key->at(4 * i),
key->at(4 * i + 1),
key->at(4 * i + 2),
key->at(4 * i + 3)
);
}
for (; i < w->count() / 4; ++i) {
uint32_t h = w->wordAt(i - 1);
if (i % Nk == 0)
h = subWord(rotWord(h)) ^ rCon(i / Nk);
else if (Nk > 6 && i % Nk == 4)
h = subWord(h);
w->wordAt(i) = w->wordAt(i - Nk) ^ h;
}
return w;
}
QRectF Cell::boundingRect(void) const
{
QRectF rCon(FRAME, FRAME, scene()->width() - FRAME * 2, scene()->height() - FRAME * 2);
QRectF rCell(0, 0, (rCon.width() - FRAME * 3) / 4, (rCon.width() - FRAME * 3) / 4);
return rCell;
}
