private MCTResult <AlgoArrayResponse> Encrypt(IModeBlockCipherParameters param)
{
var responses = new List <AlgoArrayResponse>();
var i = 0;
var j = 0;
try
{
for (i = 0; i < 100; i++)
{
var iIterationResponse = new AlgoArrayResponse
{
IV = param.Iv,
Key = param.Key,
PlainText = param.Payload
};
BitString jCipherText = null;
BitString previousCipherText = null;
BitString copyPreviousCipherText = null;
var ivCopiedBytes = iIterationResponse.IV.ToBytes();
param.Iv = new BitString(ivCopiedBytes);
for (j = 0; j < 1000; j++)
{
var jResult = _algo.ProcessPayload(param);
jCipherText = jResult.Result;
if (j == 0)
{
previousCipherText = iIterationResponse.IV;
}
param.Payload = previousCipherText;
copyPreviousCipherText = previousCipherText;
previousCipherText = jCipherText;
}
iIterationResponse.CipherText = jCipherText;
responses.Add(iIterationResponse);
param.Key = _keyMaker.MixKeys(param.Key, previousCipherText, copyPreviousCipherText);
param.Iv = previousCipherText;
}
}
catch (Exception ex)
{
ThisLogger.Debug($"i count {i}, j count {j}");
ThisLogger.Error(ex);
return(new MCTResult <AlgoArrayResponse>(ex.Message));
}
return(new MCTResult <AlgoArrayResponse>(responses));
}
private void SetupNextOuterLoopValues(ref BitString iv, ref BitString key, ref BitString input, int j, List <BitString> previousOutputs)
{
if (j == _INNER_ITERATIONS_PER_OUTPUT - 1)
{
switch (Shift)
{
case 1:
{
var len = j - key.BitLength + 1;
var keyConcatenation = ConcatenateOutputsStartingAtIndex(previousOutputs, len);
key = key.XOR(keyConcatenation).GetDeepCopy();
iv = ConcatenateOutputsStartingAtIndex(previousOutputs, j - (_blockSizeBits / Shift) + 1).GetDeepCopy();
input = previousOutputs[j - _blockSizeBits / Shift].GetDeepCopy();
break;
}
case 8:
{
var index = j - (key.BitLength / 8) + 1;
var keyConcatenation = ConcatenateOutputsStartingAtIndex(previousOutputs, index);
key = key.XOR(keyConcatenation).GetDeepCopy();
iv = ConcatenateOutputsStartingAtIndex(previousOutputs, j - (128 / 8) + 1).GetDeepCopy();
input = previousOutputs[j - 16].GetDeepCopy();
break;
}
case 128:
{
int previousOutputsLastIndex = previousOutputs.Count - 1;
var currentOutput = previousOutputs[previousOutputsLastIndex];
var previousOutput = previousOutputs[previousOutputsLastIndex - 1];
key = _keyMaker.MixKeys(
key,
currentOutput,
previousOutput
);
iv = currentOutput;
input = previousOutput;
break;
}
default:
throw new ArgumentException(nameof(Shift));
}
}
}
