public static string DesDecrypt(this string value, string password)
{
var passBytes = Encoding.ASCII.GetBytes(password);
return(Encoding.UTF8.GetString(DesCipher.DesDecrypt(Base64.DecodeToArray(value), passBytes, passBytes)));
}
public static string DesDecrypt(this string value, string password, string iv)
{
return
(Encoding.UTF8.GetString(DesCipher.DesDecrypt(Base64.DecodeToArray(value), Encoding.ASCII.GetBytes(password),
Encoding.ASCII.GetBytes(iv))));
}
private void Decrypt()
{
rtb_PlainText.TextChanged -= Rtb_PlainText_TextChanged;
rtb_PlainText.Text = String.Empty;
try
{
switch (cipherMode)
{
case CipherMode.Base64:
rtb_PlainText.Text = rtb_CipherText.Text.Base64Decode();
break;
case CipherMode.Caesar:
rtb_PlainText.Text = rtb_CipherText.Text.CaesarDecrypt((int)nud_Key.Value);
break;
case CipherMode.Des:
if (chk_ByteArrayValues.Checked)
{
var byteStrings = rtb_CipherText.Text.Replace("[", "").Split(']');
var bytes = new byte[byteStrings.Length - 1];
for (var i = 0; i < bytes.Length; i++)
{
bytes[i] = Convert.ToByte(byteStrings[i]);
}
rtb_PlainText.Text = Encoding.UTF8.GetString(DesCipher.DesDecrypt(bytes, Encoding.ASCII.GetBytes(tb_Password.Text), Encoding.ASCII.GetBytes(tb_IV.Text)));
}
else
{
rtb_PlainText.Text = rtb_CipherText.Text.DesDecrypt(tb_Password.Text, tb_IV.Text);
}
break;
case CipherMode.Rotate:
rtb_PlainText.Text = rtb_CipherText.Text.RotateDecrypt((int)nud_Key.Value);
break;
case CipherMode.TripleDes:
if (chk_ByteArrayValues.Checked)
{
var bytes = rtb_CipherText.Text.StringToByteArray();
if (chk_KeyAndIVInByteArrayFormat.Checked)
{
var keyBytes = tb_Password.Text.StringToByteArray();
var ivBytes = tb_IV.Text.StringToByteArray();
rtb_PlainText.Text = Encoding.UTF8.GetString(TripleDesCipher.TripleDesDecrypt(bytes, keyBytes, ivBytes));
}
else
{
rtb_PlainText.Text = Encoding.UTF8.GetString(TripleDesCipher.TripleDesDecrypt(bytes, Encoding.ASCII.GetBytes(tb_Password.Text), Encoding.ASCII.GetBytes(tb_IV.Text)));
}
}
else
{
if (chk_KeyAndIVInByteArrayFormat.Checked)
{
var keyBytes = tb_Password.Text.StringToByteArray();
var ivBytes = tb_IV.Text.StringToByteArray();
rtb_PlainText.Text = rtb_CipherText.Text.TripleDesDecrypt(keyBytes, ivBytes);
}
else
{
rtb_PlainText.Text = rtb_CipherText.Text.TripleDesDecrypt(tb_Password.Text, tb_IV.Text);
}
}
break;
case CipherMode.Xor:
rtb_PlainText.Text = rtb_CipherText.Text.XorCrypt(tb_Password.Text);
break;
}
}
catch (Exception ex)
{
rtb_PlainText.Text = ex.Message;
}
finally
{
rtb_PlainText.TextChanged += Rtb_PlainText_TextChanged;
}
}