/// <summary>
/// Calculate the ChaCha Hash of the given 512-bit state.
/// </summary>
/// <param name="state">The state which will be hashed</param>
/// <param name="rounds">Rounds of hash function</param>
private void ChaChaHash(ref uint[] state, int rounds)
{
if (!(rounds == 8 || rounds == 12 || rounds == 20))
{
throw new ArgumentException("Rounds must be 8, 12 or 20.");
}
// The original state before ChaCha hash function was applied. Needed for state addition afterwards.
uint[] originalState = (uint[])state.Clone();
OriginalState.Add(originalState);
for (int i = 0; i < rounds / 2; ++i)
{
// Column rounds
Quarterround(ref state, 0, 4, 8, 12);
Quarterround(ref state, 1, 5, 9, 13);
Quarterround(ref state, 2, 6, 10, 14);
Quarterround(ref state, 3, 7, 11, 15);
// Diagonal rounds
Quarterround(ref state, 0, 5, 10, 15);
Quarterround(ref state, 1, 6, 11, 12);
Quarterround(ref state, 2, 7, 8, 13);
Quarterround(ref state, 3, 4, 9, 14);
}
AdditionStep(ref state, originalState);
LittleEndianStep(ref state);
}
public InteractableData(XRManipulableInteractable interactable)
{
this.interactable = interactable;
originalState = new OriginalState
(
interactable.transform.position,
interactable.transform.localPosition,
interactable.transform.localScale,
interactable.transform.rotation
);
}
private void OnInteractableSelectEnter(XRBaseInteractor interactor)
{
isSelected = true;
if (interactor.selectTarget.GetType() != typeof(XRManipulableInteractable))
{
return;
}
if (currentInteractable.interactable == null)
{
currentInteractable = new InteractableData((XRManipulableInteractable)interactor.selectTarget);
originalState = new OriginalState(transform.position, transform.localPosition, transform.localScale, transform.rotation);
CreateManipulableCopy();
}
}
public void RecordChanges(BulkDescriptor bulk)
{
var originalDict = OriginalState.ToDictionary();
var currentDict = CurrentState.ToDictionary();
var correlation = currentDict.CorrelateWith(originalDict);
// Ensure all of the current ones have changes recorded
foreach (var tuple in correlation.SourceItems)
{
RecordChanges(tuple.Item, tuple.PairedWith, bulk);
}
// Remove anything no longer current
foreach (var aspect in correlation.NonSourceItems.SelectMany(s => s.Item.Aspects.Values))
{
aspect.RemoveAll(bulk);
}
}
private void ClearIntermediateResults()
{
// matrices
OriginalState.Clear();
OriginalStateDiffusion.Clear();
AdditionResultState.Clear();
AdditionResultStateDiffusion.Clear();
LittleEndianState.Clear();
LittleEndianStateDiffusion.Clear();
// qr
QRInput.Clear();
QRInputDiffusion.Clear();
QRStep.Clear();
QRStepDiffusion.Clear();
QROutput.Clear();
QROutputDiffusion.Clear();
InputMessage.Clear();
Keystream.Clear();
KeystreamDiffusion.Clear();
Output.Clear();
OutputDiffusion.Clear();
}
public void Rollback()
{
OriginalState.Reset(Actor);
}
public InteractableData()
{
interactable = null;
originalState = new OriginalState();
}
