public RC4(string key)
{
this.Key = RC4.KSA(RC4.StringToByteArray(key));
}
public void RC4Decryption(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 (FileStream fsr = new FileStream(file.FullName, FileMode.Open))
{
using (BinaryReader br = new BinaryReader(fsr, new ASCIIEncoding()))
{
//Reading the extension
var extensionLength = (int)br.ReadByte();
char[] extension = new char[extensionLength];
for (var i = 0; i < extensionLength; i++)
{
extension[i] = (char)br.ReadByte();
}
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()))
{
int i = 0;
int j = 0;
byte[] state = RC4.KSA();
byte readedValue = 0;
while (br.BaseStream.Position < br.BaseStream.Length)
{
//DEC
readedValue = br.ReadByte();
byte prga = RC4.PRGA(ref i, ref j, ref state);
byte decryptedValue = RC4.Decrypt(readedValue, prga);
bw.Write(decryptedValue);
if (LoadedFilesController._END_OF_ENC_DEC_THREADS)
{
bw.Dispose();
fsw.Dispose();
br.Dispose();
fsr.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 RC4(byte[] key)
{
this.Key = RC4.KSA(key);
}
public void RC4Encryption(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 fsr = new FileStream(file.FullName, FileMode.Open))
{
using (BinaryReader br = new BinaryReader(fsr, new ASCIIEncoding()))
{
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
int i = 0;
int j = 0;
byte[] state = RC4.KSA();
byte inputValue = 0;
while (br.BaseStream.Position < br.BaseStream.Length)
{
//ENC
inputValue = br.ReadByte();
byte prga = RC4.PRGA(ref i, ref j, ref state);
byte encryptedValue = RC4.Encrypt(inputValue, prga);
bw.Write(encryptedValue);
if (LoadedFilesController._END_OF_ENC_DEC_THREADS)
{
bw.Dispose();
fsw.Dispose();
br.Dispose();
fsr.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);
}
}
