Пример #1
0
 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.";
     }
 }
Пример #2
0
 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.";
     }
 }