private void BtnDecrypt_Click(object sender, EventArgs e)
{
try
{
string Enstrdata = File.ReadAllText(TXTDecrypt.Text);
RC4 rc = new RC4(TXT_DecryptPassword.Text, Enstrdata);
string newstr = rc.EnDeCrypt();
byte[] data = UnicodeEncoding.Unicode.GetBytes(newstr);
int len = BitConverter.ToInt32(data, 0);
string FileName = UnicodeEncoding.Unicode.GetString(data, 4, len);
byte[] filebytes = new byte[data.Length - 4 - len];
Array.Copy(data, 4 + len, filebytes, 0, filebytes.Length);
FileStream strem = new FileStream(FileName, FileMode.Create, FileAccess.Write);
strem.Write(filebytes, 0, filebytes.Length);
strem.Close();
LblDecResult.Text = "File Decrypted.";
}
catch (Exception ex)
{
LblDecResult.Text = "Failed.";
}
}
private void BtnEncrypt_Click(object sender, EventArgs e)
{
try
{
string[] dir = TXTEncrypt.Text.Split('\\');
byte[] directory = UnicodeEncoding.Unicode.GetBytes(dir[dir.Length - 1]);
FileStream stream = new FileStream(TXTEncrypt.Text, FileMode.Open, FileAccess.Read);
byte[] data = new byte[stream.Length];
stream.Read(data, 0, data.Length);
stream.Close();
byte[] newdata = new byte[4 + directory.Length + data.Length];
BitConverter.GetBytes(directory.Length).CopyTo(newdata, 0);
directory.CopyTo(newdata, 4);
data.CopyTo(newdata, 4 + directory.Length);
RC4 rc = new RC4(TXT_EncryptPassword.Text, UnicodeEncoding.Unicode.GetString(newdata));
string str = rc.EnDeCrypt();
File.WriteAllText("Enc_" + (new Random()).Next(1, 53456345), str);
LblEncResult.Text = "File Encrypted.";
}
catch (Exception ex)
{
LblEncResult.Text = "Failed.";
}
}
