public void Start(string InputFilename, string OutputFilename, UInt64 Key, DESMode.DESMode Mode, bool Decode)
{
using (System.IO.BinaryReader Reader = new System.IO.BinaryReader(System.IO.File.Open(InputFilename, System.IO.FileMode.Open)))
{
using (System.IO.BinaryWriter Writer = new System.IO.BinaryWriter(System.IO.File.Open(OutputFilename, System.IO.FileMode.OpenOrCreate)))
{
const int MaxSize = 1048576;
int n = 0;
byte[] buffer = new byte[MaxSize];
int size = 0;
int k = 0;
UInt64 DESResult = 0;
while ((n = Reader.Read(buffer, 0, MaxSize)) > 0)
{
k = 0;
while (n > 0)
{
if ((n / 8) > 0)
size = 8;
else
size = n;
byte[] tempArray = new byte[size];
for (int i = 0; i != size; ++i, ++k)
tempArray[i] = buffer[k];
if (!Decode)
DESResult = Mode.EncodeBlock(GetUIntFromByteArray(tempArray), Key);
else
DESResult = Mode.DecodeBlock(GetUIntFromByteArray(tempArray), Key);
Writer.Write(GetByteArrayFromUInt(DESResult, size), 0, size);
n -= 8;
}
}
Writer.Close();
}
Reader.Close();
}
}
public string Encript(string message)
{
mode = DESMode.Encription;
byte[] byteMessage = PreprocessMessage(message);
List<BinaryNumber> ipInput = new List<BinaryNumber>();
BinaryNumber temp = new BinaryNumber();
for (int i = 0; i < byteMessage.Length; i++)
{
temp.Add(ToBinaryNumber(byteMessage[i], 8));
if ((i + 1)%8 == 0)
{
ipInput.Add(new BinaryNumber(temp));
temp.Clear();
}
}
encrypted = new List<BinaryNumber>();
for (int i = 0; i < ipInput.Count; i++)
{
encrypted.Add(Process(ipInput[i]));
}
StringBuilder sb = new StringBuilder();
foreach (var binaryNumber in encrypted)
{
sb.Append(binaryNumber);
}
return sb.ToString();
}
public string Decript()
{
mode = DESMode.Decription;
List<BinaryNumber> decrypted = new List<BinaryNumber>();
for (int i = 0; i < encrypted.Count; i++)
{
decrypted.Add(Process(encrypted[i]));
}
List<byte> decryptedBytes = new List<byte>();
foreach (var binaryNumber in decrypted)
{
string b = "";
for (int i = 0; i < binaryNumber.Length; i++)
{
b += binaryNumber[i];
if ((i+1)%8 == 0)
{
decryptedBytes.Add(Convert.ToByte(b, 2));
b = "";
}
}
}
return Encoding.Unicode.GetString(decryptedBytes.ToArray());
}
