public void TestCorrect1()
{
OFB ofb = createOFB(16, 16, 127);
var actual = ofb.Decode(plaintext);
CollectionAssert.AreEqual(expected, actual);
}
/// <exception cref="ArgumentException">Wrong length of IV.</exception>
public ICryptoTransform Create(CryptoDirection direction, Mode mode, byte[] iv)
{
if (iv.Length != BlockSize)
{
throw new ArgumentException("Wrong length of IV.");
}
InitRoundKey(direction);
switch (mode)
{
default:
case Mode.ECB:
if (direction == CryptoDirection.Encrypt)
{
return(new FROGEncryptTransform(_encryptRoundKeys));
}
else
{
return(new FROGDecryptTransform(_decryptRoundKeys));
}
case Mode.CBC:
return(CBC.Get(CreateNice(direction), iv, direction));
case Mode.CFB:
return(CFB.Get(CreateNice(CryptoDirection.Encrypt), iv, direction));
case Mode.OFB:
return(OFB.Get(CreateNice(CryptoDirection.Encrypt), iv, direction));
}
}
private IMode ChooseMode(string mode, byte[] key, DesEngine engine)
{
IMode chosenMode;
switch (mode)
{
case "ECB":
chosenMode = new ECB(engine);
break;
case "CBC":
chosenMode = new CBC(engine, key.ToArray());
break;
case "CFB":
chosenMode = new CFB(engine, key.ToArray());
break;
case "OFB":
chosenMode = new OFB(engine, key.ToArray());
break;
default:
throw new Exception("Неправильный режим");
}
return(chosenMode);
}
public void TestCorrect3()
{
byte[] plain = { 0x32 };
byte[] ciphertext = { 0x54 };
OFB ofb = createOFB(16, 16, 1);
CollectionAssert.AreEqual(ciphertext, ofb.Decode(plain));
}
/* executes class program */
public static void Main(String[] args)
{
OFB ofb = new OFB();
Console.Write("\n===== OFB (Output Feedback) =====\n");
Console.Write("\n\n== START PROGRAM ==\n\n");
ofb.driver();
Console.Write("\n\n== END PROGRAM ==\n\n");
Console.ReadLine();
}
public void TestCorrect2()
{
byte[] plain = { 0x32, 0x88, 0x31, 0xe0, 0x43 };
byte[] ciphertext = { 0x54, 0x67, 0xb9 };
byte[] actual = new byte[3];
OFB ofb = createOFB(16, 16, 3);
Array.Copy(ofb.Decode(plain), actual, 3);
CollectionAssert.AreEqual(ciphertext, actual);
}
public static void Main(String[] args)
/* executes class program */
{
OFB ofb = new OFB();
Console.Write("\n===== OFB (Output Feedback) =====\n");
Console.Write("\n\n== START PROGRAM ==\n\n");
ofb.driver();
Console.Write("\n\n== END PROGRAM ==\n\n");
Console.ReadLine();
}
private void OFBTest(byte[] Key, byte[, ][] Input, byte[, ][] Output)
{
byte[] outBytes = new byte[16];
byte[] iv = _vectors[0];
int index = 18;
if (Key.Length == 24)
{
index = 20;
}
else if (Key.Length == 32)
{
index = 22;
}
using (OFB mode = new OFB(new RHX()))
{
mode.Initialize(true, new KeyParams(Key, iv));
for (int i = 0; i < 4; i++)
{
mode.Transform(Input[index, i], outBytes);
if (Evaluate.AreEqual(outBytes, Output[index, i]) == false)
{
throw new Exception("OFB Mode: Encrypted arrays are not equal!");
}
}
}
index++;
using (OFB mode = new OFB(new RHX()))
{
mode.Initialize(false, new KeyParams(Key, iv));
for (int i = 0; i < 4; i++)
{
mode.Transform(Input[index, i], outBytes);
if (Evaluate.AreEqual(outBytes, _output[index, i]) == false)
{
throw new Exception("OFB Mode: Decrypted arrays are not equal!");
}
}
}
}
/// <exception cref="ArgumentException">Wrong key length or IV length</exception>
public static ICryptoTransform Get(byte[] key, Size stateSize, byte[] IV, Mode mode, CryptoDirection direction)
{
switch (mode)
{
default:
case Mode.ECB:
return(Get(key, stateSize, direction));
case Mode.CBC:
return(CBC.Get(GetNice(key, stateSize, direction), IV, direction));
case Mode.CFB:
return(CFB.Get(GetNice(key, stateSize, CryptoDirection.Encrypt), IV, direction));
case Mode.OFB:
return(OFB.Get(GetNice(key, stateSize, CryptoDirection.Encrypt), IV, direction));
}
}
private async void buttonEncode_Click(object sender, EventArgs e)
{
if ((textBoxKey.Text == "" && byteKey == null) ||
(textBoxC0.Text == "" && bytec0 == null && !radioButtonECB.Checked))
{
MessageBox.Show("Не введены данные");
return;
}
if (openFileDialog.ShowDialog() == DialogResult.Cancel)
{
return;
}
var filePath = openFileDialog.FileName;
Task read = Task.Run(() =>
{
try
{
text = File.ReadAllBytes(filePath);
}
catch (OutOfMemoryException ex)
{
MessageBox.Show(ex.Message);
return;
}
});
read.Wait();
if (text == null)
{
MessageBox.Show("Нет текста");
return;
}
ICoder modeWork = null;
if (byteKey == null)
{
byteKey = Encoding.Default.GetBytes(textBoxKey.Text);
}
var addByte = new List <byte>();
for (int i = byteKey.Length; i < blockKeySize; i++)
{
addByte.Add(byteKey[i % byteKey.Length]);
}
byteKey = byteKey.Concat(addByte.ToArray()).ToArray();
if (!radioButtonECB.Checked)
{
if (bytec0 == null)
{
bytec0 = Encoding.Default.GetBytes(textBoxC0.Text);
}
addByte = new List <byte>();
for (int i = bytec0.Length; i < blockSize; i++)
{
addByte.Add(bytec0[i % bytec0.Length]);
}
bytec0 = bytec0.Concat(addByte.ToArray()).ToArray();
}
if (text.Length % blockSize != 0)
{
addByte = new List <byte>();
for (int i = 0; i < blockSize - text.Length % blockSize; i++)
{
addByte.Add(0);
}
text = text.Concat(addByte.ToArray()).ToArray();
}
uint[] T = new uint[14];
for (int i = 0; i < byteKey.Length; i += subblockSize)
{
T[i / subblockSize] = BitConverter.ToUInt32(byteKey.Skip(i).Take(subblockSize).ToArray(), 0);
}
var fileName = Path.GetFileName(openFileDialog.FileName);
FormFile wind = new FormFile(fileName, true);
var mars = new Mars(T);
if (radioButtonECB.Checked)
{
modeWork = new ECB(mars, wind);
}
else if (radioButtonCBC.Checked)
{
modeWork = new CBC(mars, bytec0, wind);
}
else if (radioButtonCFB.Checked)
{
modeWork = new CFB(mars, bytec0, wind);
}
else if (radioButtonOFB.Checked)
{
modeWork = new OFB(mars, bytec0, wind);
}
wind.Show();
byte[] result = new byte[] { };
if (radioButtonECB.Checked)
{
int processorCount = 2;
Task <byte[]>[] allTasks = new Task <byte[]> [processorCount];
for (int i = 0; i < processorCount; i++)
{
int indexI = i; // т.к. значение i может поменяться при EndInvoke
allTasks[indexI] = Task.Run(() => modeWork.Encode(text.Skip(text.Length / processorCount * i).Take(text.Length / processorCount).ToArray()));
Thread.Sleep(100);
}
await Task.WhenAll(allTasks);
for (int i = 0; i < processorCount; i++)
{
result = result.Concat(allTasks[i].Result).ToArray();
}
}
else
{
result = await modeWork.Encode(text);
}
wind.progressBar.Value = 100;
using (var fs = System.IO.File.Create(Application.StartupPath + "\\(MARS)" + fileName))
{
await fs.WriteAsync(result, 0, result.Count());
fs.Flush();
}
}
public async Task <ActionResult <string> > Post(IFormFile message, KACD kacd)
{
byte[] byteMessage = null;
if (message == null)
{
ModelState.AddModelError("Error", "Некорректные параметры");
return(BadRequest(ModelState));
}
ICoder modeWork = null;
try
{
if (kacd.key == null || kacd.mode == null)
{
throw new FormatException();
}
var byteKey = Encoding.Default.GetBytes(kacd.key);
byte[] bytec0 = null;
if (kacd.mode != "ecb")
{
if (kacd.c0 == null)
{
throw new FormatException();
}
bytec0 = Encoding.Default.GetBytes(kacd.c0);
if (bytec0.Length != 8)
{
throw new FormatException();
}
}
if (byteKey.Length != 8)
{
throw new FormatException();
}
using (var ms = new MemoryStream())
{
message.CopyTo(ms);
byteMessage = ms.ToArray();
}
if (byteMessage.Length % 8 != 0)
{
var addByte = new List <byte>();
for (int i = 0; i < 8 - byteMessage.Length % 8; i++)
{
addByte.Add(0);
}
byteMessage = byteMessage.Concat(addByte.ToArray()).ToArray();
}
var des = new DES(BitConverter.ToUInt64(byteKey));
switch (kacd.mode)
{
case "ecb":
modeWork = new ECB(des);
break;
case "cbc":
modeWork = new CBC(des, bytec0);
break;
case "cfb":
modeWork = new CFB(des, bytec0);
break;
case "ofb":
modeWork = new OFB(des, bytec0);
break;
}
}
catch (FormatException)
{
ModelState.AddModelError("Error", "Некорректные параметры");
return(BadRequest(ModelState));
}
var result = kacd.decode != null?modeWork.Decode(byteMessage) : modeWork.Encode(byteMessage);
var path = "(DES)" + message.FileName;
using (var fs = System.IO.File.Create(_environment.WebRootPath + "/" + path))
{
fs.Write(result, 0, result.Count());
fs.Flush();
}
return(path);
}
public void TestNotCorrectText()
{
OFB ofb = createOFB(16, 16, 127);
var actual = ofb.Decode(null);
}
private void OfbModeTest()
{
AllocateRandom(ref _iv, 16);
AllocateRandom(ref _key, 32);
KeyParams kp = new KeyParams(_key, _iv);
RHX eng = new RHX();
OFB cipher = new OFB(eng);
OFB cipher2 = new OFB(eng);
ISO7816 padding = new ISO7816();
cipher.IsParallel = false;
CipherStream cs = new CipherStream(cipher2, padding);
for (int i = 0; i < 10; i++)
{
int sze = AllocateRandom(ref _plnText, 0, eng.BlockSize);
int prlBlock = sze - (sze % (cipher.BlockSize * _processorCount));
_cmpText = new byte[sze];
_decText = new byte[sze];
_encText = new byte[sze];
MemoryStream mIn = new MemoryStream(_plnText);
MemoryStream mOut = new MemoryStream();
MemoryStream mRes = new MemoryStream();
// *** Compare encryption output *** //
// local processor
cipher.Initialize(true, kp);
BlockEncrypt(cipher, padding, _plnText, 0, ref _encText, 0);
// streamcipher linear mode
cs.IsParallel = false;
// memorystream interface
cs.Initialize(true, kp);
cs.Write(mIn, mOut);
if (!Evaluate.AreEqual(mOut.ToArray(), _encText))
{
throw new Exception("CipherStreamTest: Encrypted arrays are not equal!");
}
// byte array interface
cs.Initialize(true, kp);
cs.Write(_plnText, 0, ref _cmpText, 0);
if (!Evaluate.AreEqual(_cmpText, _encText))
{
throw new Exception("CipherStreamTest: Encrypted arrays are not equal!");
}
// ***compare decryption output *** //
// local processor
cipher.Initialize(false, kp);
BlockDecrypt(cipher, padding, _encText, 0, ref _decText, 0);
if (!Evaluate.AreEqual(_plnText, _decText))
{
throw new Exception("CipherStreamTest: Decrypted arrays are not equal!");
}
// decrypt linear mode
cipher2.IsParallel = false;
mOut.Seek(0, SeekOrigin.Begin);
cs.Initialize(false, kp);
cs.Write(mOut, mRes);
if (!Evaluate.AreEqual(mRes.ToArray(), _decText))
{
throw new Exception("CipherStreamTest: Decrypted arrays are not equal!");
}
// byte array interface
cs.Initialize(false, kp);
Array.Resize(ref _cmpText, _encText.Length);
cs.Write(_encText, 0, ref _cmpText, 0);
if (!Evaluate.AreEqual(_cmpText, _decText))
{
throw new Exception("CipherStreamTest: Decrypted arrays are not equal!");
}
}
eng.Dispose();
}
