// Allow using HMAC without bringing (most of) the whole crypto stack (using CryptoConfig)
// or even without bringing all the hash algorithms (using a common switch)
internal void SetHash(string name, HashAlgorithm instance)
{
_hashName = name;
_algo = instance;
}
private void Button1_Click(object sender, EventArgs Obj)
{
if (comboBox1.SelectedIndex != -1)
{
if (CheckData())
{
if (comboBox1.SelectedIndex == 0)
{
BigInteger fi = FindFuncEl(BigInteger.Parse(textBoxP.Text), BigInteger.Parse(textBoxQ.Text));
BigInteger d = BigInteger.Parse(textBoxD.Text);
BigInteger n = BigInteger.Parse(textBoxP.Text) * BigInteger.Parse(textBoxQ.Text);
textBoxR.Text = n.ToString();
BigInteger e, temp;
EuclideanAlgorithm(fi, d, out e, out temp);
if (e.Sign < 0)
{
e += fi;
}
textBoxE.Text = e.ToString();
SHA1.SHA1 sha1 = new SHA1.SHA1();
byte[] hash = sha1.ComputeHash(currentFile);
uint[] decHash = ArrBytesToArrUint(hash);
textBoxFH.Text = ToHexString(decHash);
plainSignature = BigInteger.Parse("0" + ToHexString(decHash), NumberStyles.HexNumber);
textBoxFD.Text = plainSignature.ToString();
plainSignature = FastExp(plainSignature, d, n);
}
else
{
SHA1.SHA1 sha1 = new SHA1.SHA1();
byte[] hash = sha1.ComputeHash(currentFile);
uint[] decHash = ArrBytesToArrUint(hash);
textBoxFH.Text = ToHexString(decHash);
plainSignature = BigInteger.Parse("0" + ToHexString(decHash), NumberStyles.HexNumber);
textBoxFD.Text = plainSignature.ToString();
if (cipherSignature == plainSignature)
{
MessageBox.Show(signatureTrue, sucsess, MessageBoxButtons.OK, MessageBoxIcon.Asterisk);
}
else
{
Error(signatureFalse);;
}
}
}
else if (currentFile == null)
{
Error(errorSelectedFile);
}
else
{
Error(invalidData);
}
}
else
{
Error(selectAction);
}
}
