public byte[][] SplitBlocks(byte[] paddedInputBits)
{
Debug.Assert(paddedInputBits.Length % rate == 0);
int numberOfBlocks = paddedInputBits.Length / rate;
byte[][] inputBlocks = null;
byte[] block;
/* split message into blocks of size `rate` */
List <byte[]> inputBlockList = new List <byte[]>(numberOfBlocks);
for (int i = 0; i < numberOfBlocks; i++)
{
block = KeccakHashFunction.SubArray(paddedInputBits, i * rate, rate);
inputBlockList.Add(block);
}
inputBlocks = inputBlockList.ToArray();
return(inputBlocks);
}
public byte[] Squeeze(int outputLength)
{
byte[] output = new byte[outputLength];
#if _DEBUG_
Console.WriteLine("\n#Sponge: begin squeezing phase");
#endif
if (outputLength <= rate)
{
#if _DEBUG_
Console.WriteLine("#Sponge: the output length is smaller or equal to the bit rate size ({0} <= {1})", outputLength, rate);
Console.WriteLine("#Sponge: -> squeeze output from state");
#endif
/* append `outputLength` bits of the state to the output */
output = KeccakHashFunction.SubArray(state, 0, outputLength);
/* presentation squeezing phase*/
#region presentation squeezing phase
if (pres.IsVisible && !pres.skipPresentation)
{
pres.Dispatcher.Invoke(DispatcherPriority.Normal, (SendOrPostCallback) delegate
{
pres.labelRound.Content = "";
pres.labelBlock.Content = "";
}, null);
}
if (pres.IsVisible && !pres.skipPresentation)
{
string stateStr = KeccakHashFunction.GetByteArrayAsString(state, laneSize);
string outputStr = KeccakHashFunction.GetByteArrayAsString(output, laneSize);
pres.Dispatcher.Invoke(DispatcherPriority.Normal, (SendOrPostCallback) delegate
{
pres.textBlockExplanation.Text = string.Format(Resources.PresSqueezingPhaseExplanation, outputLength); // If the hash value is larger than this part the state is repeatedly permuted by Keccak-f such that sufficient output can be extracted.", outputLength);
pres.imgBlankPage.Visibility = Visibility.Visible;
pres.labelCurrentPhase.Content = Resources.PresSqueezingPhase;
pres.labelOutput.Visibility = Visibility.Visible;
pres.textBlockStateBeforeAbsorb.Text = stateStr;
pres.absorbGrid.Visibility = Visibility.Visible;
pres.labelOldState.Content = Resources.PresState;
pres.textBlockStateAfterAbsorb.Text = outputStr;
}, null);
}
#endregion
}
else
{
int remainingOutput = outputLength, i = 0;
#if _DEBUG_
int squeezingRounds = remainingOutput % rate == 0 ? (int)(remainingOutput / rate - 1) : (remainingOutput / rate);
Console.WriteLine("#Sponge: the output length is larger than the bit rate ({0} > {1})", outputLength, rate);
Console.WriteLine("#Sponge: -> squeeze output from state iteratively ({0} iteration(s) required)\n", squeezingRounds);
#endif
/* append size of `rate` bits of the state to the output */
while (remainingOutput > rate)
{
Array.Copy(state, 0, output, i++ *rate, rate);
#if _DEBUG_
Console.WriteLine("#Sponge: squeeze iteration #{0}\n", i);
#endif
remainingOutput -= rate;
plugin.ProgressChanged((double)progressionStepCounter + (1.0 / 6.0), (double)progressionSteps);
keccak_f.Permute(ref state, progressionStepCounter, progressionSteps);
progressionStepCounter++;
}
if (remainingOutput > 0)
{
/* append remaining bits of the state to the output to fit the output length */
Array.Copy(state, 0, output, i * rate, remainingOutput);
}
}
#if _DEBUG_
Console.WriteLine("#Sponge: squeezing done!\n");
#endif
if (pres.IsVisible)
{
pres.Dispatcher.Invoke(DispatcherPriority.Normal, (SendOrPostCallback) delegate
{
pres.spInfo.Visibility = Visibility.Hidden;
//pres.labelCurrentStep.Content = "";
//pres.labelCurrentPhase.Content = "";
}, null);
}
return(output);
}
