TCW_WHITENING_SIZE
cc->key_extra_size = cc->iv_size + TCW_WHITENING_SIZE;
if (cc->key_size <= (cc->iv_size + TCW_WHITENING_SIZE)) {
tcw->whitening = kzalloc(TCW_WHITENING_SIZE, GFP_KERNEL);
int key_offset = cc->key_size - cc->iv_size - TCW_WHITENING_SIZE;
TCW_WHITENING_SIZE);
memset(tcw->whitening, 0, TCW_WHITENING_SIZE);
u8 buf[TCW_WHITENING_SIZE];