private void btDecode_Click(object sender, RoutedEventArgs e)
{
Passphrase pass = new Passphrase();
pass.Owner = this;
pass.ShowDialog();
byte[] decrypted;
using (FileStream fileStream = File.OpenRead(file))
{
decrypted = new byte[fileStream.Length];
fileStream.Read(decrypted, 0, decrypted.Length);
}
SymmetricAlgorithm sa;
CipherMode mode;
PaddingMode padding = PaddingMode.None;
byte[] keyT = Encoding.UTF8.GetBytes(pass.pbPass.Password);
SHA256 sha256 = new SHA256Cng();
keyT = sha256.ComputeHash(keyT);
int n = 0;
if (rbDeAES.IsChecked == true)
{
sa = AesCryptoServiceProvider.Create();
n = 32;
}
else
{
sa = TripleDESCryptoServiceProvider.Create();
n = 24;
}
byte[] key = new byte[n];
Array.Copy(keyT, key, n);
byte[] iv = new byte[8];
if (n == 24)
{
iv = new byte[8];
}
else
{
iv = new byte[16];
}
if (rbEnCBC.IsChecked == true)
{
mode = CipherMode.CBC;
}
else
{
if (rbEnCFB.IsEnabled)
{
mode = CipherMode.CFB;
}
else
{
mode = CipherMode.CTS;
}
}
byte[] entrophy = sha256.ComputeHash(Encoding.UTF8.GetBytes(pass.pbPass.Password)); //File.ReadAllBytes(@"D:\OSU\ЗПиД\ЗПиД6\Энтропия.txt");//113 183
// SHA256 sha256 = new SHA256Cng();
// entrophy = sha256.ComputeHash(entrophy);
using (FileStream fstream = File.OpenRead(@"D:\OSU\ЗПиД\ЗПиД6\Пароль.txt"))
{
byte[] keyTemp = new byte[fstream.Length];
fstream.Read(keyTemp, 0, keyTemp.Length);
key = ProtectedData.Unprotect(keyTemp, entrophy, DataProtectionScope.CurrentUser);
// keyT = Decrypt(temp, sa, key, iv, mode, padding);
}
//Array.Copy(keyT, key, n);
byte[] decr = Decrypt(decrypted, sa, key, iv, mode, padding);
string result = Encoding.UTF8.GetString(decr);
File.WriteAllText(@"C:\Users\Nastya\Desktop\Университет\ЗПиД\ЗПиД6\Результат.txt", result, Encoding.UTF8);
MessageBox.Show("Выполнено!");
tbDeOpenDialog.Text = "";
}
private void Encode_Click(object sender, RoutedEventArgs e)
{
Passphrase pass = new Passphrase();
pass.Owner = this;
pass.ShowDialog();
SymmetricAlgorithm sa;
byte[] iv = new byte[8];
CipherMode mode;
PaddingMode padding = PaddingMode.Zeros;
int n = 0;
if (rbEnAES.IsChecked == true)
{
sa = AesCryptoServiceProvider.Create();
n = 32;
}
else
{
sa = TripleDESCryptoServiceProvider.Create();
n = 24;
}
if (n == 32)
{
iv = new byte[16];
}
byte[] key = new byte[n];
if (rbEnCBC.IsChecked == true)
{
mode = CipherMode.CBC;
}
else
{
if (rbEnCFB.IsChecked == true)
{
mode = CipherMode.CFB;
}
else
{
mode = CipherMode.CTS;
}
}
byte[] entrophy = new byte[32];
/* RNGCryptoServiceProvider rng = new RNGCryptoServiceProvider();
* rng.GetBytes(entrophy);*/
SHA256 sha256 = new SHA256Cng();
entrophy = sha256.ComputeHash(Encoding.UTF8.GetBytes(pass.pbPass.Password));//114 174 3
byte[] salt = Encoding.UTF8.GetBytes("saltsaltsalt");
// File.WriteAllBytes(@"D:\OSU\ЗПиД\ЗПиД6\Энтропия.txt", entrophy);
if (rbGeneration.IsChecked == true)
{
Rfc2898DeriveBytes pbkdf2 = new Rfc2898DeriveBytes(pass.pbPass.Password, salt, 10000);
key = pbkdf2.GetBytes(n);
}
else
{
Rfc2898DeriveBytes pbkdf2 = new Rfc2898DeriveBytes(pbKeyPhrase.Password, salt, 10000);
key = pbkdf2.GetBytes(n);
}
byte[] encrypted = Encrypt(dataText, sa, key, iv, mode, padding);
using (
FileStream fs = new FileStream(@"D:\OSU\ЗПиД\ЗПиД6\Шифр.txt",
FileMode.Create))
{
fs.Write(encrypted, 0, encrypted.Length);
}
byte[] keyTemp = Encoding.UTF8.GetBytes(pass.pbPass.Password);
// SHA256 sha256 = new SHA256Managed();
keyTemp = sha256.ComputeHash(keyTemp);
byte[] keyForkey = new byte[n];
Array.Copy(keyTemp, keyForkey, n);
// byte[] en = Encrypt(key, sa, keyForkey, iv, mode, padding);
byte[] en = ProtectedData.Protect(key, entrophy, DataProtectionScope.CurrentUser);
using (
FileStream fs_key = new FileStream(@"D:\OSU\ЗПиД\ЗПиД6\Пароль.txt",
FileMode.Create))
{
fs_key.Write(en, 0, en.Length);
}
MessageBox.Show("Выполнено!");
tbEnOpenDialog.Text = "";
rbGeneration.IsChecked = true;
pbKeyPhrase.Password = "";
rbGeneration_Checked(sender, e);
}