public static string Decyphering(string closedMessageBlockDuoSS, string key)
{
int[] blocksBeforeInputWhiting = new int[4];
Int32[] blocksBeforeOutputWhiting = new Int32[4];
List <string> openMessage = new List <string>();
var subkeysArr = SubkeysGen.SubKeysGeneration(key);
var XDataBlocks = StringMethods.StringToList(closedMessageBlockDuoSS, XBlockLength);
for (int i = 0; i < 4; i++)
{
blocksBeforeOutputWhiting[i] = Convert.ToInt32(XDataBlocks[i], 2) ^ Convert.ToInt32(subkeysArr[i + 36], 2);
}
for (int round = 15; round > -1; round--)
{
blocksBeforeOutputWhiting = OneRoundReverse(blocksBeforeOutputWhiting, subkeysArr, round);
}
for (int i = 0; i < 4; i++)
{
blocksBeforeInputWhiting[i] = blocksBeforeOutputWhiting[i] ^ Convert.ToInt32(subkeysArr[i], 2);
openMessage.Add(StringMethods.MyConvertToString(blocksBeforeInputWhiting[i], 2, 32));
}
var resultStringDuoSS = StringMethods.ListToString(openMessage);
return(resultStringDuoSS);
}
public static string Cyphering(string openMessageBlockDuoSS, string key)
{
int [] blocksAfterInputWhiting = new int [4];
int [] blocksAfterOutputWhiting = new int [4];
List <string> closedMessage = new List <string>();
var subkeysArr = SubkeysGen.SubKeysGeneration(key);
var XDataBlocks = StringMethods.StringToList(openMessageBlockDuoSS, XBlockLength);
for (int i = 0; i < 4; i++)
{
blocksAfterInputWhiting[i] = Convert.ToInt32(XDataBlocks[i], 2) ^ Convert.ToInt32(subkeysArr[i], 2);
}
for (int round = 0; round < 16; round++)
{
blocksAfterInputWhiting = OneRound(blocksAfterInputWhiting, subkeysArr, round);
}
for (int i = 0; i < 4; i++)
{
blocksAfterOutputWhiting[i] = blocksAfterInputWhiting[i] ^ Convert.ToInt32(subkeysArr[i + 36], 2);
closedMessage.Add(StringMethods.MyConvertToString(blocksAfterOutputWhiting[i], 2, 32));
}
var resultStringDuoSS = StringMethods.ListToString(closedMessage);
return(resultStringDuoSS);
}
public static int[] OneRoundReverse(int[] blocksArray, List <string> subKeys, int roundNum)
{
int[] roundResult = new int[4];
int shiftedD = blocksArray[3];
for (int i = 0; i < 8; i++)
{
shiftedD = Convert.ToInt32(MyMath.LeftCycleShift(StringMethods.MyConvertToString(shiftedD, 2, 32)), 2);
}
var blockCafterG = GFunction(StringMethods.MyConvertToString(blocksArray[2], 2, 32));
var blockDafterG = GFunction(StringMethods.MyConvertToString(shiftedD, 2, 32));
var blockCandD = (Convert.ToInt32(blockCafterG, 2) + Convert.ToInt32(blockDafterG, 2)) % Math.Pow(2, 32);
var CPlusKey = blockCandD + Convert.ToInt32(subKeys.ElementAt(2 * roundNum + 8), 2);
var DPlusKey = blockCandD + Convert.ToInt32(subKeys.ElementAt(2 * roundNum + 9), 2);
blocksArray[0] = Convert.ToInt32(MyMath.LeftCycleShift(StringMethods.MyConvertToString(blocksArray[0], 2, 32)), 2);
blocksArray[1] = blocksArray[1] ^ (int)DPlusKey;
blocksArray[1] = Convert.ToInt32(MyMath.RightCycleShift(StringMethods.MyConvertToString(blocksArray[1], 2, 32)), 2);
blocksArray[0] = blocksArray[0] ^ (int)CPlusKey;
roundResult[0] = blocksArray[2];
roundResult[1] = blocksArray[3];
roundResult[2] = blocksArray[0];
roundResult[3] = blocksArray[1];
return(roundResult);
}
public static int[] OneRound(int [] blocksArray, List <string> subKeys, int roundNum)
{
int [] roundResult = new int [4];
var stringB = StringMethods.MyConvertToString(blocksArray[1], 2, 32);
for (int i = 0; i < 8; i++)
{
stringB = MyMath.LeftCycleShift(stringB);
}
int shiftedB = Convert.ToInt32(stringB, 2);
var blockAafterG = GFunction(StringMethods.MyConvertToString(blocksArray[0], 2, 32));
var blockBafterG = GFunction(StringMethods.MyConvertToString(shiftedB, 2, 32));
var blockAandB = (Convert.ToInt32(blockAafterG, 2) + Convert.ToInt32(blockBafterG, 2)) % Math.Pow(2, 32);
var APlusKey = blockAandB + Convert.ToInt32(subKeys.ElementAt(2 * roundNum + 8), 2);
var BPlusKey = blockAandB + Convert.ToInt32(subKeys.ElementAt(2 * roundNum + 9), 2);
blocksArray[2] = blocksArray[2] ^ (int)APlusKey;
blocksArray[3] = Convert.ToInt32(MyMath.LeftCycleShift(StringMethods.MyConvertToString(blocksArray[3], 2, 32)), 2);
blocksArray[3] = blocksArray[3] ^ (int)BPlusKey;
blocksArray[2] = Convert.ToInt32(MyMath.RightCycleShift(StringMethods.MyConvertToString(blocksArray[2], 2, 32)), 2);
roundResult[0] = blocksArray[2];
roundResult[1] = blocksArray[3];
roundResult[2] = blocksArray[0];
roundResult[3] = blocksArray[1];
return(roundResult);
}
public static int[] OneRoundLog(int[] blocksArray, List <string> subKeys, int roundNum, string fileWay)
{
StringBuilder strBuild = new StringBuilder();
string[] blocksName = { "A", "B", "C", "D" };
int[] roundResult = new int[4];
strBuild.AppendLine();
strBuild.AppendLine($"-------------------------------Round{roundNum}------------------------------");
strBuild.AppendLine($"Input blocks: [{blocksName[0]}]: {StringMethods.MyConvertToString(blocksArray[0], 2, 32)};");
for (int i = 1; i < 4; i++)
{
strBuild.AppendLine($" [{blocksName[i]}]: {StringMethods.MyConvertToString(blocksArray[i], 2, 32)};");
}
var stringB = StringMethods.MyConvertToString(blocksArray[1], 2, 32);
for (int i = 0; i < 8; i++)
{
stringB = MyMath.LeftCycleShift(stringB);
}
strBuild.AppendLine($"Содержимое субблока B циклически сдвигается влево на 8 бит: [{blocksName[1]}]= {stringB};");
int shiftedB = Convert.ToInt32(stringB, 2);
var blockAafterG = TwofishAlgo.GFunction(StringMethods.MyConvertToString(blocksArray[0], 2, 32));
strBuild.AppendLine($"Субблок A обрабатывается операцией g(): [{blocksName[0]}]= {blockAafterG};");
var blockBafterG = TwofishAlgo.GFunction(StringMethods.MyConvertToString(shiftedB, 2, 32));
strBuild.AppendLine($"Субблок B также обрабатывается операцией g(): [{blocksName[1]}]= {blockBafterG};");
var blockAandB = (Convert.ToInt32(blockAafterG, 2) + Convert.ToInt32(blockBafterG, 2)) % Math.Pow(2, 32);
strBuild.AppendLine($"Субблок B накладывается на A с помощью сложения по модулю 232,\n после чего аналогичным образом выполняется наложение субблока A на субблок B: [{blocksName[0]}]= [{blocksName[1]}]= {StringMethods.MyConvertToString((int)blockAandB,2,32)};");
var APlusKey = blockAandB + Convert.ToInt32(subKeys.ElementAt(2 * roundNum + 8), 2);
strBuild.AppendLine($"Фрагмент расширенного ключа K2r+8 (где r — номер текущего раунда, начиная с 0) складывается с субблоком A по модулю 232: [{blocksName[0]}] = {StringMethods.MyConvertToString((int)APlusKey, 2, 32)};");
var BPlusKey = blockAandB + Convert.ToInt32(subKeys.ElementAt(2 * roundNum + 9), 2);
strBuild.AppendLine($"Аналогично предыдущему шагу, K2r+9 накладывается на субблок B: [{blocksName[1]}] = {StringMethods.MyConvertToString((int)BPlusKey, 2, 32)};");
blocksArray[2] = blocksArray[2] ^ (int)APlusKey;
strBuild.AppendLine($"Субблок A накладывается на C операцией XOR: [{blocksName[2]}] = {StringMethods.MyConvertToString(blocksArray[2], 2, 32)};");
blocksArray[3] = Convert.ToInt32(MyMath.LeftCycleShift(StringMethods.MyConvertToString(blocksArray[3], 2, 32)), 2);
strBuild.AppendLine($"Содержимое субблока D циклически сдвигается влево на 1 бит: [{blocksName[3]}] = {StringMethods.MyConvertToString(blocksArray[3], 2, 32)};");
blocksArray[3] = blocksArray[3] ^ (int)BPlusKey;
strBuild.AppendLine($"Субблок B накладывается на D операцией XOR: [{blocksName[3]}] = {StringMethods.MyConvertToString(blocksArray[3], 2, 32)};");
blocksArray[2] = Convert.ToInt32(MyMath.RightCycleShift(StringMethods.MyConvertToString(blocksArray[2], 2, 32)), 2);
strBuild.AppendLine($"Содержимое субблока C циклически сдвигается вправо на 1 бит: [{blocksName[2]}] = {StringMethods.MyConvertToString(blocksArray[2], 2, 32)};");
roundResult[0] = blocksArray[2];
roundResult[1] = blocksArray[3];
roundResult[2] = blocksArray[0];
roundResult[3] = blocksArray[1];
strBuild.AppendLine($"Output blocks: [{blocksName[0]}]: {StringMethods.MyConvertToString(roundResult[0], 2, 32)};");
for (int i = 1; i < 4; i++)
{
strBuild.AppendLine($" [{blocksName[i]}]: {StringMethods.MyConvertToString(roundResult[i], 2, 32)};");
}
File.AppendAllText(fileWay, strBuild.ToString());
return(roundResult);
}
public static string ConvertTextToBinString(string textMessage)
{
var bytesData = Encoding.Default.GetBytes(textMessage);
string openMessageBin = "";
for (int i = 0; i < bytesData.Length; i++)
{
openMessageBin += (StringMethods.MyConvertToString(Convert.ToInt32(bytesData[i]), 2, 8));
}
return(openMessageBin);
}
public static void LogEncrypt(string key, string openMes, string fileWay)
{
StringBuilder strBuild = new StringBuilder();
int[] blocksAfterInputWhiting = new int[4];
int[] blocksAfterOutputWhiting = new int[4];
List <string> closedMessage = new List <string>();
var subkeysArr = SubkeysGen.SubKeysGeneration(key);
strBuild.AppendLine($"Open message block: {openMes};");
strBuild.AppendLine($"Key({key.Length.ToString()}): {key};");
strBuild.AppendLine($"RoundKeys: {subkeysArr[0]};");
for (int i = 1; i < 40; i++)
{
strBuild.AppendLine($" {subkeysArr[i]};");
}
var XDataBlocks = StringMethods.StringToList(openMes, TwofishAlgo.XBlockLength);
strBuild.AppendLine();
strBuild.AppendLine($"**************************Input Whiting**************************");
strBuild.AppendLine();
for (int i = 0; i < 4; i++)
{
blocksAfterInputWhiting[i] = Convert.ToInt32(XDataBlocks[i], 2) ^ Convert.ToInt32(subkeysArr[i], 2);
strBuild.AppendLine($"{XDataBlocks[i]} xor {subkeysArr[i]} = {StringMethods.MyConvertToString(blocksAfterInputWhiting[i], 2, 32)};");
}
strBuild.AppendLine();
strBuild.AppendLine($"**************************The Main Cycle**************************");
File.AppendAllText(fileWay, strBuild.ToString());
for (int round = 0; round < 16; round++)
{
blocksAfterInputWhiting = OneRoundLog(blocksAfterInputWhiting, subkeysArr, round, fileWay);
}
strBuild.AppendLine();
strBuild.AppendLine($"**************************Output Whiting**************************");
strBuild.AppendLine();
for (int i = 0; i < 4; i++)
{
blocksAfterOutputWhiting[i] = blocksAfterInputWhiting[i] ^ Convert.ToInt32(subkeysArr[i + 36], 2);
closedMessage.Add(StringMethods.MyConvertToString(blocksAfterOutputWhiting[i], 2, 32));
strBuild.AppendLine($"{StringMethods.MyConvertToString(blocksAfterInputWhiting[i], 2, 32)} xor {subkeysArr[i+36]} = {StringMethods.MyConvertToString(blocksAfterOutputWhiting[i], 2, 32)};");
}
var resultStringDuoSS = StringMethods.ListToString(closedMessage);
strBuild.AppendLine($"Closed message block: {resultStringDuoSS};");
}
public static string GFunction(string dataBlock32)
{
int[,] matrixAfterQ = new int[1, 4];
//int[,] resultArrayStep5 = new int[1, 4];
string block32BitAfterQ = "";
var eightBitBlocks = StringMethods.StringToList(dataBlock32, 8);
int blockNum = 0;
string gResult = "";
foreach (string subWord in eightBitBlocks)
{
int y = 0;
var a0 = Convert.ToInt32(subWord, 2) / 16;
var b0 = Convert.ToInt32(subWord, 2) % 16;
var a1 = a0 ^ b0;
var b0Nibbles = StringMethods.StringToList(StringMethods.MyConvertToString(b0, 2, 8), SubkeysGen.NibbleLength);
foreach (string nibble in b0Nibbles)
{
MyMath.RightCycleShift(nibble);
}
var b1 = (a0 ^ Convert.ToInt32(StringMethods.ListToString(b0Nibbles), 2) ^ (8 * a0)) % 16;
if (SubkeysGen.qOperationMatrix[4, blockNum] == 0)
{
var a2 = Convert.ToInt32(SubkeysGen.tItoeForQ0[0, a1], 16);
var b2 = Convert.ToInt32(SubkeysGen.tItoeForQ0[1, b1], 16);
var a3 = a2 ^ b2;
var b2Nibbles = StringMethods.StringToList(StringMethods.MyConvertToString(b2, 2, 8), SubkeysGen.NibbleLength);
foreach (string nibble in b2Nibbles)
{
MyMath.RightCycleShift(nibble);
}
var b3 = (a2 ^ Convert.ToInt32(StringMethods.ListToString(b2Nibbles), 2) ^ (8 * a2)) % 16;
var a4 = Convert.ToInt32(SubkeysGen.tItoeForQ0[2, a3], 16);
var b4 = Convert.ToInt32(SubkeysGen.tItoeForQ0[3, b3], 16);
y = 16 * a4 + b4;
}
else
{
var a2 = Convert.ToInt32(SubkeysGen.tItoeForQ1[0, a1], 16);
var b2 = Convert.ToInt32(SubkeysGen.tItoeForQ1[1, b1], 16);
var a3 = a2 ^ b2;
var b2Nibbles = StringMethods.StringToList(StringMethods.MyConvertToString(b2, 2, 8), SubkeysGen.NibbleLength);
foreach (string nibble in b2Nibbles)
{
MyMath.RightCycleShift(nibble);
}
var b3 = (a2 ^ Convert.ToInt32(StringMethods.ListToString(b2Nibbles), 2) ^ (8 * a2)) % 16;
var a4 = Convert.ToInt32(SubkeysGen.tItoeForQ1[2, a3], 16);
var b4 = Convert.ToInt32(SubkeysGen.tItoeForQ1[3, b3], 16);
y = 16 * a4 + b4;
}
block32BitAfterQ += StringMethods.MyConvertToString(y, 2, 32);
blockNum++;
}
var arrayAfterQ = StringMethods.StringToList(block32BitAfterQ, 8);
for (int k = 0; k < 4; k++)
{
matrixAfterQ[0, k] = Convert.ToInt32(arrayAfterQ.ElementAt(k), 2);
}
//resultArrayStep5 = MyMath.MatrixMultiplication(SubkeysGen.M1Matrix, matrixAfterQ);
for (int j = 0; j < 4; j++)
{
gResult += StringMethods.MyConvertToString(matrixAfterQ[0, j], 2, 8);
}
return(gResult);
}
public static List <string> SubKeysGeneration(string key)
{
if (key.Length < 128)
{
while (key.Length != 128)
{
key = key.Insert(0, "0");
}
}
else if (key.Length < 192)
{
while (key.Length != 192)
{
key = key.Insert(0, "0");
}
}
else if (key.Length < 256)
{
while (key.Length != 256)
{
key = key.Insert(0, "0");
}
}
var forCalculations = key.Length / 64;
var bigMKeyBlocks = StringMethods.StringToList(key, XBlockLength);
var lilMKeyBlocksBin = StringMethods.StringToList(key, byteLength);
int[] arrayV = new int[forCalculations];
List <string> arrayMe = new List <string>();
List <string> arrayMo = new List <string> ();
int[,] lilMKeyBlocksMatrix = new int[8, 1];
List <string> subkeys = new List <string>();
for (int i = 0; i < forCalculations; i++)
{
for (int k = 0; k < 8; k++)
{
lilMKeyBlocksMatrix[k, 0] = Convert.ToInt32(lilMKeyBlocksBin[i * 8 + k], 2);
}
var promezhutoch = MyMath.MatrixMultiplication(M2Matrix, lilMKeyBlocksMatrix);
int vItoe = 0;
for (int j = 0; j < 4; j++)
{
vItoe += (int)(promezhutoch[j, 0]);
}
arrayV[forCalculations - i - 1] = vItoe;//можно объединить с фором выше
arrayMe.Add(bigMKeyBlocks[2 * i]);
arrayMo.Add(bigMKeyBlocks[2 * i + 1]);
}
for (int i = 0; i < 40; i++)
{
var AItoe = HFunction(StringMethods.MyConvertToString((int)(2 * i * p), 2, 32), arrayMe, forCalculations);
var BItoe = StringMethods.MyConvertToString(HFunction(StringMethods.MyConvertToString((int)((2 * i + 1) * p), 2, 32), arrayMo, forCalculations), 2, 32);
for (int j = 0; j < 8; j++)
{
BItoe = MyMath.LeftCycleShift(BItoe);
}
if ((i % 2) == 0)
{
var subkeyI = StringMethods.MyConvertToString((int)(AItoe + Convert.ToInt32(BItoe, 2) % Math.Pow(2, 32)), 2, 32);
subkeys.Add(subkeyI);
}
else
{
var subkeyI = StringMethods.MyConvertToString((int)(AItoe + Convert.ToInt32(BItoe, 2) * 2 % Math.Pow(2, 32)), 2, 32);
for (int j = 0; j < 9; j++)
{
subkeyI = MyMath.LeftCycleShift(subkeyI);
}
subkeys.Add(subkeyI);
}
}
return(subkeys);
}
public static int HFunction(string word32BitDuoSS, List <string> arrayForCalculations, int kNumber)
{
int[,] matrixStep5 = new int[1, 4];
//int[,] resultArrayStep5 = new int[1, 4];
while (word32BitDuoSS.Length != 32)
{
word32BitDuoSS = word32BitDuoSS.Insert(0, "0");
}
string stepResult = word32BitDuoSS;
int stepNum = 2;
if (kNumber >= 2)
{
if (kNumber > 2)
{
stepNum -= 1;
if (kNumber > 3)
{
stepNum -= 1;
}
}
}
for (int i = stepNum; i < 5; i++)
{
string block32BitAfterQ = "";
var subWords8Bit = StringMethods.StringToList(stepResult, byteLength);
int flag = 0;
foreach (string subWord in subWords8Bit)
{
int y = 0;
var a0 = Convert.ToInt32(subWord, 2) / 16;
var b0 = Convert.ToInt32(subWord, 2) % 16;
var a1 = a0 ^ b0;
var test = StringMethods.MyConvertToString(b0, 2, 8);
var b0Nibbles = StringMethods.StringToList(StringMethods.MyConvertToString(b0, 2, 8), NibbleLength);
foreach (string nibble in b0Nibbles)
{
MyMath.RightCycleShift(nibble);
}
var b1 = (a0 ^ Convert.ToInt32(StringMethods.ListToString(b0Nibbles), 2) ^ (8 * a0)) % 16;
if (qOperationMatrix[stepNum, flag] == 0)
{
var a2 = Convert.ToInt32(tItoeForQ0[0, a1], 16);
var b2 = Convert.ToInt32(tItoeForQ0[1, b1], 16);
var a3 = a2 ^ b2;
var b2Nibbles = StringMethods.StringToList(StringMethods.MyConvertToString(b2, 2, 8), NibbleLength);
foreach (string nibble in b2Nibbles)
{
MyMath.RightCycleShift(nibble);
}
var b3 = (a2 ^ Convert.ToInt32(StringMethods.ListToString(b2Nibbles), 2) ^ (8 * a2)) % 16;
var a4 = Convert.ToInt32(tItoeForQ0[2, a3], 16);
var b4 = Convert.ToInt32(tItoeForQ0[3, b3], 16);
y = 16 * a4 + b4;
}
else
{
var a2 = Convert.ToInt32(tItoeForQ1[0, a1], 16);
var b2 = Convert.ToInt32(tItoeForQ1[1, b1], 16);
var a3 = a2 ^ b2;
var b2Nibbles = StringMethods.StringToList(StringMethods.MyConvertToString(b2, 2, 8), NibbleLength);
foreach (string nibble in b2Nibbles)
{
MyMath.RightCycleShift(nibble);
}
var b3 = (a2 ^ Convert.ToInt32(StringMethods.ListToString(b2Nibbles), 2) ^ (8 * a2)) % 16;
var a4 = Convert.ToInt32(tItoeForQ1[2, a3], 16);
var b4 = Convert.ToInt32(tItoeForQ1[3, b3], 16);
y = 16 * a4 + b4;
}
block32BitAfterQ += StringMethods.MyConvertToString(y, 2, 8);
flag++;
}
if (i != 4)
{
stepResult = StringMethods.MyConvertToString(Convert.ToInt32(block32BitAfterQ, 2) ^ Convert.ToInt32(arrayForCalculations[3 - i], 2), 2, 32);
}
else
{
var arrayAfterQ = StringMethods.StringToList(block32BitAfterQ, 8);
for (int k = 0; k < 4; k++)
{
matrixStep5[0, k] = Convert.ToInt32(arrayAfterQ[k], 2);
}
//resultArrayStep5 = MyMath.MatrixMultiplication(M1Matrix, matrixStep5);
}
}
int hResult = 0;
for (int j = 0; j < 3; j++)
{
hResult += (int)(matrixStep5[0, j]);
}
return(hResult);
}