public void TEABMPDecryption(FileInfo file, FormModel model)
{
bool threadSuccesfull = false;
var timeStarted = DateTime.Now;
try
{
if (!file.Extension.Contains("bmp"))
{
throw new Exception("File is not bmp!");
}
//OutputFileName
string outputFileName = "";
//Log
loggerController.Add(" ! File dec: " + file.Name + ", Alg: " + model.AlgorithmName);
//OutputFileName
outputFileName = FileNameCreator.CreateFileDecryptedName(
model.Folders.OutputFolder,
file.Name,
".bmp");
using (FileStream fsw = new FileStream(outputFileName, FileMode.Create))
{
using (BinaryWriter bw = new BinaryWriter(fsw, new ASCIIEncoding()))
{
//Reading and encrypting files
var readedValue = File.ReadAllBytes(file.FullName);
long pos = readedValue[10] + 256 * (readedValue[11] + 256 * (readedValue[12] + 256 * readedValue[13]));
byte[] header = new byte[pos];
for (int i = 0; i < header.Length; i++)
{
header[i] = readedValue[i];
}
byte[] data = readedValue.Skip(header.Length).ToArray();
var decryptedValue = TEA.Decrypt(data);
decryptedValue = header.Concat(decryptedValue).ToArray();
bw.Write(decryptedValue);
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 TEADecryption(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
//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; i < readedValues.Length; i++)
{
newValue[k] = readedValues[i];
k++;
}
var decryptedValue = TEA.Decrypt(newValue);
bw.Write(decryptedValue);
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);
}
}