//methods for Encrypt or Decrypt a FILE
public static void Encrypted(string password, string Path)
{
var nameOnFile = "";
var newEncryption = new SDESMethods(Path.Split('\\')[Path.Split('\\').Length - 1], ref nameOnFile, password);
using (var file = new FileStream(Path, FileMode.Open))
{
using (var text = new BinaryReader(file))
{
var name = Path.Split('\\');
name[name.Length - 1] = name[name.Length - 1].Split('.')[0] + ".cif";
var salida = string.Join("\\", name);
var eightBits = "";
using (var fileToWrite = new FileStream(salida, FileMode.Create))
{
using (var toWrite = new BinaryWriter(fileToWrite, Encoding.ASCII))
{
toWrite.Write("::" + nameOnFile + "||");
for (int i = 0; i < text.BaseStream.Length; i++)
{
eightBits = Convert.ToString(text.ReadByte(), 2).PadLeft(8, '0');
toWrite.Write(Convert.ToByte(newEncryption.Ciphertext(eightBits), 2));
}
}
}
}
}
}
public static void Decrypted(string password, string Path)
{
try
{
var OriginalName = "";
var NameOnFile = "";
var eightBits = "";
using (var fileForRead = new FileStream(Path, FileMode.Open))
{
using (var text = new BinaryReader(fileForRead))
{
ReadNames(text, ref OriginalName, ref NameOnFile);
var name = Path.Split('\\');
name[name.Length - 1] = OriginalName;
var salida = string.Join("\\", name);
var newDecryption = new SDESMethods(NameOnFile, password);
using (var fileForWrite = new FileStream(salida, FileMode.Create))
{
using (var toWrite = new BinaryWriter(fileForWrite, Encoding.GetEncoding("iso-8859-1")))
{
text.BaseStream.Seek(NameOnFile.Length + 5, SeekOrigin.Begin);
for (int i = NameOnFile.Length + 5; i < text.BaseStream.Length; i++)
{
eightBits = Convert.ToString(text.ReadByte(), 2).PadLeft(8, '0');
toWrite.Write(Convert.ToByte(newDecryption.Decrypted(eightBits), 2));
}
}
}
}
}
}
catch (Exception e)
{
Console.WriteLine("No se tienen registros que dicho archivo esta cifrado con SDES");
}
}
