public void SimpleSubstitutionDecryption(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);
//Read a file char by char, and decrypt it
using (StreamReader sr = new StreamReader(file.FullName))
{
//Reading the extension
var extensionLength = (int)sr.Read();
char[] extension = new char[extensionLength];
for (var i = 0; i < extensionLength; i++)
{
extension[i] = (char)sr.Read();
}
var finalExtesnion = "." + new string(extension);
//Output file name
outputFileName = FileNameCreator.CreateFileDecryptedName(
model.Folders.OutputFolder,
file.Name,
finalExtesnion);
using (StreamWriter sw = new StreamWriter(outputFileName))
{
while (sr.Peek() >= 0)
{
char character = (char)sr.Read();
character = Char.ToUpper(character);
if (character < 65 || character > 90)
{
sw.Write(character);
}
else
{
sw.Write(SimpleSubstituionCipher.Decrypt(character));
}
if (LoadedFilesController._END_OF_ENC_DEC_THREADS)
{
sr.Dispose();
sw.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);
}
}
//
//-----------------------------------------------------------------------------------------------------
// Algorithms
//-----------------------------------------------------------------------------------------------------
//
public void SimpleSubstitutionEncryption(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 (StreamReader sr = new StreamReader(file.FullName))
{
using (StreamWriter sw = new StreamWriter(outputFileName))
{
//Writing the extension
char[] extension = file.Extension.Substring(1, file.Extension.Length - 1).ToCharArray();
char extensionLength = (char)extension.Length;
sw.Write(extensionLength);
for (var k = 0; k < extension.Length; k++)
{
sw.Write(extension[k]);
}
//Reading - encrypting - saving data
while (sr.Peek() >= 0)
{
char character = (char)sr.Read();
character = Char.ToLower(character);
if (character < 97 || character > 122)
{
sw.Write(character);
}
else
{
sw.Write(SimpleSubstituionCipher.Encrypt(character));
}
if (LoadedFilesController._END_OF_ENC_DEC_THREADS)
{
sr.Dispose();
sw.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);
}
}
