public string Vernam(string inputFileName, string outputFileName)
{
_currentProgress = 0;
try
{
using (FileStream fsread = new FileStream(inputFileName, FileMode.Open, FileAccess.Read))
{
using (FileStream fswrite = new FileStream(outputFileName, FileMode.Create, FileAccess.Write))
{
Model2 part2 = new Model2();
var count = fsread.Length / 100;
if (count == 0)
{
throw new Exception("Пустой файл");
}
for (int i = 0; i < fsread.Length; i++)
{
if (_worker != null)
{
if (i % count == 0 && i != 0)
{
_worker.ReportProgress(_currentProgress);
Thread.Sleep(1);
_currentProgress = _currentProgress + 1;
_onPropertyChanged("CurrentProgress");
}
}
int readByte = fsread.ReadByte();
uint res;
string key = "keykeykeykeykeykeykey";
Dictionary <char, int> alph = new Dictionary <char, int>();
Dictionary <int, char> alph_r = new Dictionary <int, char>();
for (int j = 0; j < 256; j++)
{
char c = (char)j;
alph.Add(c, j);
alph_r.Add(j, c);
}
int idx;
if (alph.TryGetValue((char)readByte, out idx))
{
res = (uint)alph_r[(idx ^ alph[key[i % key.Length]]) % alph.Count];
fswrite.WriteByte(BitConverter.GetBytes(res)[0]);
}
}
}
}
}
catch (Exception e)
{
return(e.Message);
}
return("");
}
//вычисление ключа для следующего раунда расшифровки. циклический сдвиг << 2
private UInt32 KeyToPrevRound(UInt32 key)
{
Model2 model2 = new Model2();
return(model2.CyclicShiftLeft(key, 2));
}
//вычисление ключа для следующего раунда шифрования. циклический сдвиг >> 2
private UInt32 KeyToNextRound(UInt32 key)
{
Model2 model2 = new Model2();
return(model2.CyclicShiftRight(key, 2));
}
public string MyAlgorithm(string inputFileName, string outputFileName, ModeEncryption mode)
{
_currentProgress = 0;
try
{
using (FileStream fsread = new FileStream(inputFileName, FileMode.Open, FileAccess.Read))
{
using (FileStream fswrite = new FileStream(outputFileName, FileMode.Create, FileAccess.Write))
{
Model2 part2 = new Model2();
var count = fsread.Length / 100;
if (count == 0)
{
throw new Exception("Пустой файл");
}
for (int i = 0; i < fsread.Length; i++)
{
if (_worker != null)
{
if (i % count == 0 && i != 0)
{
_worker.ReportProgress(_currentProgress);
Thread.Sleep(5);
_currentProgress = _currentProgress + 1;
_onPropertyChanged("CurrentProgress");
}
}
int readByte = fsread.ReadByte();
uint res;
if (mode == ModeEncryption.Encrypt)
{
res = part2.SwapBits((uint)readByte, new List <byte> {
5, 3, 7, 1, 4, 0, 6, 2
});
}
else
{
res = part2.SwapBits((uint)readByte, new List <byte> {
5, 1, 7, 3, 6, 0, 4, 2
});
}
fswrite.WriteByte(BitConverter.GetBytes(res)[0]);
}
}
}
}
catch (Exception e)
{
return(e.Message);
}
return("");
}
public string Rc4(string inputFileName, string outputFileName)
{
_currentProgress = 0;
try
{
using (FileStream fsread = new FileStream(inputFileName, FileMode.Open, FileAccess.Read))
{
using (FileStream fswrite = new FileStream(outputFileName, FileMode.Create, FileAccess.Write))
{
Model2 part2 = new Model2();
var count = fsread.Length / 100;
if (count == 0)
{
throw new Exception("Пустой файл");
}
RC4 rc4 = new RC4("keykeykeykeykeykeykey");
for (int q = 0; q < fsread.Length; q++)
{
if (_worker != null)
{
if (q % count == 0 && q != 0)
{
_worker.ReportProgress(_currentProgress);
Thread.Sleep(1);
_currentProgress = _currentProgress + 1;
_onPropertyChanged("CurrentProgress");
}
}
int readByte = fsread.ReadByte();
uint result = rc4.EncodeByte((uint)readByte);
fswrite.WriteByte(BitConverter.GetBytes(result)[0]);
}
}
}
}
catch (Exception e)
{
return(e.Message);
}
return("");
}
