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 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};");
}
private void Encode_Click(object sender, EventArgs e)
{
//var len = TwofishAlgo.testKey.Length;
var openMessage = File.ReadAllText(@WayFrom.Text);
var openMessageBin = StringMethods.ConvertTextToBinString(openMessage);
List <string> encodedBlocks = new List <string>();
List <byte> intViewOfBytes = new List <byte>();
string result = "";
//byte[] bytesResult = new byte[];
if (openMessageBin.Length % 128 != 0)
{
for (int i = openMessageBin.Length % 128; i < 128; i++)
{
openMessageBin += "0";
}
}
var blocks128bit = StringMethods.StringToList(openMessageBin, 128);
foreach (string block in blocks128bit)
{
encodedBlocks.Add(TwofishAlgo.Cyphering(block, TwofishAlgo.testKey));
}
var binaryResultString = StringMethods.ListToString(encodedBlocks);
var bytesResultHashset = StringMethods.StringToList(binaryResultString, 8);
foreach (string resultByte in bytesResultHashset)
{
intViewOfBytes.Add(Convert.ToByte(Convert.ToInt32(resultByte, 2)));
}
var arrayOfBytes = intViewOfBytes.ToArray();
Encoding encoding = Encoding.GetEncoding(1251);
for (int i = 0; i < arrayOfBytes.Count(); i++)
{
byte [] oneByte = new byte[1];
oneByte [0] = arrayOfBytes[i];
result += encoding.GetString(oneByte);
}
File.WriteAllText(WayTo.Text, result, Encoding.UTF8);
var fileName = Convert.ToString(DateTime.Now).Replace(":", "_");
string keyPath = "G:\\KINGSTON\\8 сем\\КМЗИ\\лаб3+дз\\" + fileName + ".txt";
File.WriteAllText(keyPath, TwofishAlgo.testKey);
}
private void Decypher_Click(object sender, EventArgs e)
{
var closedMessage = File.ReadAllText(@WayFrom.Text);
var key = File.ReadAllText(@KeyWay.Text);
var closedMessageBin = StringMethods.ConvertTextToBinString(closedMessage);
List <string> decodedBlocks = new List <string>();
List <byte> intViewOfBytes = new List <byte>();
string result = "";
if (closedMessageBin.Length % 128 != 0)
{
for (int i = closedMessageBin.Length % 128; i < 128; i++)
{
closedMessageBin += "0";
}
}
var blocks128bit = StringMethods.StringToList(closedMessageBin, 128);
foreach (string block in blocks128bit)
{
decodedBlocks.Add(TwofishAlgo.Decyphering(block, key));
}
var binaryResultString = StringMethods.ListToString(decodedBlocks);
var bytesResultHashset = StringMethods.StringToList(binaryResultString, 8);
foreach (string resultByte in bytesResultHashset)
{
intViewOfBytes.Add(Convert.ToByte(Convert.ToInt32(resultByte, 2)));
}
var arrayOfBytes = intViewOfBytes.ToArray();
Encoding encoding = Encoding.GetEncoding(1251);
for (int i = 0; i < arrayOfBytes.Count(); i++)
{
byte[] oneByte = new byte[1];
oneByte[0] = arrayOfBytes[i];
result += encoding.GetString(oneByte);
}
File.WriteAllText(WayTo.Text, result, Encoding.UTF8);
}
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 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);
}