public void Absorb(byte[] input)
{
byte[] paddedInputBits;
byte[][] inputBlocks;
/* pad message */
paddedInputBits = Pad(input);
/* split padded message into blocks of equal length */
inputBlocks = SplitBlocks(paddedInputBits);
#region presentation execution phase information
if (pres.IsVisible && !pres.skipPresentation)
{
pres.Dispatcher.Invoke(DispatcherPriority.Normal, (SendOrPostCallback) delegate
{
pres.labelCurrentPhase.Content = Resources.PresExecution;
pres.labelCurrentStep.Content = Resources.PresOverview;
pres.labelExecutionInfoStateSize.Content = string.Format(Resources.PresExecutionInfoStateSize, (rate + capacity));
pres.labelExecutionInfoCapacitySize.Content = string.Format(Resources.PresExecutionInfoCapacitySize, capacity);
pres.labelExecutionInfoRateSize.Content = string.Format(Resources.PresExecutionInfoBitRateSize, rate);
pres.labelExecutionMessageLength.Content = string.Format(Resources.PresExecutionMessageLength, input.Length, input.Length / 8);
pres.labelExecutionPaddedMessageLength.Content = string.Format(Resources.PresExecutionPaddedMessageLength, paddedInputBits.Length, paddedInputBits.Length / 8);
pres.labelExecutionNumberOfBlocks.Content = string.Format(Resources.PresExecutionNumberOfBlocks, inputBlocks.Length);
pres.executionInfoCanvas.Visibility = Visibility.Visible;
}, null);
AutoResetEvent buttonNextClickedEvent = pres.buttonNextClickedEvent;
buttonNextClickedEvent.WaitOne();
pres.Dispatcher.Invoke(DispatcherPriority.Normal, (SendOrPostCallback) delegate
{
pres.executionInfoCanvas.Visibility = Visibility.Hidden;
}, null);
}
#endregion
#if _DEBUG_
Console.WriteLine("#Sponge: the input of length {0} bits is padded to {1} bits\n" +
"#Sponge: the padded input is splitted into {2} block(s) of size {3} bit\n", input.Length, paddedInputBits.Length, inputBlocks.Length, inputBlocks[0].Length);
Console.WriteLine("#Sponge: begin absorbing phase");
#endif
int blocksCounter = 1;
progressionStepCounter = 0;
if (pres.IsVisible && !pres.skipPresentation)
{
pres.Dispatcher.Invoke(DispatcherPriority.Normal, (SendOrPostCallback) delegate
{
pres.spInfo.Visibility = Visibility.Visible;
}, null);
}
/* absorb and permute */
foreach (byte[] block in inputBlocks)
{
#if _DEBUG_
Console.WriteLine("#Sponge: XORing input block #{0} on state\n", blocksCounter);
#endif
#region presentation absorbing phase
if (pres.IsVisible && !pres.skipPresentation)
{
string stateStr = KeccakHashFunction.GetByteArrayAsString(state, laneSize);
string blockStr = KeccakHashFunction.GetByteArrayAsString(block, laneSize);
pres.Dispatcher.Invoke(DispatcherPriority.Normal, (SendOrPostCallback) delegate
{
pres.labelRound.Content = "";
pres.labelBlock.Content = string.Format("Block {0}/{1}", blocksCounter, inputBlocks.Length);
pres.textBlockExplanation.Text = string.Format(Resources.PresAbsorbingPhaseExplanation, blocksCounter);
pres.imgBlankPage.Visibility = Visibility.Visible;
pres.labelCurrentPhase.Content = Resources.PresAbsorbingPhase;
pres.labelCurrentStep.Content = "";
pres.labelAbsorbGridBlockCounter.Content = string.Format("Block #{0}/{1}", blocksCounter, inputBlocks.Length);
pres.labelNewState.Visibility = Visibility.Visible;
pres.labelOldState.Content = Resources.PresOldState;
pres.textBlockStateBeforeAbsorb.Text = stateStr;
pres.textBlockBlockToAbsorb.Text = blockStr;
pres.absorbGrid.Visibility = Visibility.Visible;
pres.buttonSkipPermutation.IsEnabled = true;
pres.buttonSkip.IsEnabled = false;
pres.buttonAutostep.IsEnabled = false;
pres.autostepSpeedSlider.IsEnabled = false;
}, null);
//AutoResetEvent buttonNextClickedEvent = pres.buttonNextClickedEvent;
//buttonNextClickedEvent.WaitOne();
}
#endregion
XorBlockOnState(block);
plugin.ProgressChanged((double)progressionStepCounter + (1.0 / 6.0), (double)progressionSteps);
#region presentation absorbing phase
if (pres.IsVisible && !pres.skipPresentation)
{
string stateStr = KeccakHashFunction.GetByteArrayAsString(state, laneSize);
pres.Dispatcher.Invoke(DispatcherPriority.Normal, (SendOrPostCallback) delegate
{
pres.textBlockStateAfterAbsorb.Text = stateStr;
}, null);
AutoResetEvent buttonNextClickedEvent = pres.buttonNextClickedEvent;
buttonNextClickedEvent.WaitOne();
}
if (pres.IsVisible || pres.skipPresentation)
{
pres.Dispatcher.Invoke(DispatcherPriority.Normal, (SendOrPostCallback) delegate
{
pres.textBlockExplanation.Text = "";
pres.labelAbsorbGridBlockCounter.Content = "";
pres.absorbGrid.Visibility = Visibility.Hidden;
pres.imgBlankPage.Visibility = Visibility.Hidden;
pres.labelNewState.Visibility = Visibility.Hidden;
pres.labelOldState.Content = "";
pres.textBlockStateBeforeAbsorb.Text = "";
pres.textBlockBlockToAbsorb.Text = "";
pres.textBlockStateAfterAbsorb.Text = "";
pres.labelCurrentPhase.Content = "";
pres.labelCurrentStep.Content = "";
}, null);
}
#endregion
keccak_f.Permute(ref state, progressionStepCounter, progressionSteps);
blocksCounter++;
progressionStepCounter++;
pres.skipPermutation = false;
}
#if _DEBUG_
Console.WriteLine("\n#Sponge: absorbing done!");
blocksCounter++;
#endif
}
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);
}
