public void KnapsackDecryption(FileInfo file, FormModel model)
{
bool threadSuccesfull = false;
var timeStarted = DateTime.Now;
try
{
//OutputFileName
string outputFileName = "";
//Log
loggerController.Add(" ! File dec: " + file.Name + ", Alg: " + model.AlgorithmName);
//Reading the extension
var readedValues = File.ReadAllBytes(file.FullName);
int lenght = 0;
var extensionLength = (int)readedValues[0];
lenght++;
char[] extension = new char[extensionLength];
int j = 0;
for (var i = 1; i <= extensionLength; i++)
{
extension[j] = (char)readedValues[i];
j++;
lenght++;
}
var finalExtesnion = "." + new string(extension);
//OutputFileName
outputFileName = FileNameCreator.CreateFileDecryptedName(
model.Folders.OutputFolder,
file.Name,
finalExtesnion);
using (FileStream fsw = new FileStream(outputFileName, FileMode.Create))
{
using (BinaryWriter bw = new BinaryWriter(fsw, new ASCIIEncoding()))
{
//DEC
byte[] newValue = new byte[readedValues.Length - lenght];
int k = 0;
for (int i = lenght + 1; i < readedValues.Length; i++)
{
newValue[k] = readedValues[i];
k++;
}
var dataToDec = System.Text.Encoding.ASCII.GetString(newValue);
string[] codes = dataToDec.Split(' ');
string output = "";
foreach (string s in codes)
{
try
{
int C = Convert.ToInt32(s);
output += System.Convert.ToChar(System.Convert.ToInt32(KnapsackAlg.Decrypt(C), 2));
}
catch
{
}
}
bw.Write(output);
if (LoadedFilesController._END_OF_ENC_DEC_THREADS)
{
bw.Dispose();
fsw.Dispose();
File.Delete(outputFileName);
Thread.CurrentThread.Abort();
}
}
}
threadSuccesfull = true;
Thread.Sleep(250);
}
catch (Exception ex)
{
loggerController.Add(" ? Dec exception: " + ex.Message);
threadSuccesfull = false;
}
finally
{
this.ThreadEnds(file, threadSuccesfull, timeStarted);
}
}
public void KnapsackEncryption(FileInfo file, FormModel model)
{
bool threadSuccesfull = false;
var timeStarted = DateTime.Now;
try
{
//OutputFileName
string outputFileName = FileNameCreator.CreateFileEncryptedName(
model.Folders.OutputFolder,
file.Name,
model.AlgorithmName);
//Log
loggerController.Add(" ! File enc: " + file.Name + ", Alg: " + model.AlgorithmName);
//Read a file char by char, and encrypt it
using (FileStream fsw = new FileStream(outputFileName, FileMode.Create))
{
using (BinaryWriter bw = new BinaryWriter(fsw, new ASCIIEncoding()))
{
//Writing the extension
char[] extension = file.Extension.Substring(1, file.Extension.Length - 1).ToCharArray();
char extensionLength = (char)extension.Length;
bw.Write(extensionLength);
for (var k = 0; k < extension.Length; k++)
{
bw.Write(extension[k]);
}
//Reading and encrypting files
var readedValue = File.ReadAllBytes(file.FullName);
string output = "";
foreach (byte b in readedValue)
{
string s = UtilConverter.FromDeciamlToBinary(b);
output += KnapsackAlg.Encrypt(s) + " ";
}
bw.Write(output);
if (LoadedFilesController._END_OF_ENC_DEC_THREADS)
{
bw.Dispose();
fsw.Dispose();
File.Delete(outputFileName);
Thread.CurrentThread.Abort();
}
}
}
threadSuccesfull = true;
Thread.Sleep(250);
}
catch (Exception ex)
{
loggerController.Add(" ? Enc exception: " + ex.Message);
threadSuccesfull = false;
}
finally
{
this.ThreadEnds(file, threadSuccesfull, timeStarted);
}
}
