private void KryptoMainForm_Load(object sender, EventArgs e)
{
EncryptInputFileField.Text = ENCRYPTION_INPUT_PATH;
EncryptOutputFileField.Text = ENCRYPTION_OUTPUT_PATH;
DecryptInputFileField.Text = ENCRYPTION_OUTPUT_PATH;
DecryptOutputFileField.Text = DECRYPTION_OUTPUT_PATH;
AlphabetField1.Text = RSACore.GetAlphabet();
AlphabetField2.Text = RSACore.GetAlphabet();
}
private void GenerateKeysButton_Click(object sender, EventArgs evt)
{
string publickey;
string privatekey;
BigInteger p;
BigInteger q;
try
{
p = BigInteger.Parse(TextBoxP.Text);
q = BigInteger.Parse(TextBoxQ.Text);
if ((TextBoxP.Text == "") || TextBoxQ.Text == "")
{
MessageBox.Show("Please specify both p and q parameters and try again.", "Error", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
}
else if (!IsNumeric(TextBoxP.Text) || !IsNumeric(TextBoxQ.Text))
{
MessageBox.Show("Non-numeric input detected! Please double-check and try again.", "Error", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
}
else if (!RSACore.IsPrime(p) || !RSACore.IsPrime(q))
{
MessageBox.Show("Both p and q parameters should be prime numbers! Please double-check and try again.", "Error", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
}
else
{
KeyGenerationConsole.Items.Clear();
RSACore.GetEncryptionParameters(p, q, out BigInteger n, out BigInteger phi, out BigInteger d, out BigInteger e);
publickey = $"PUBLIC KEY (e, n): ({e}, {n})";
privatekey = $"PRIVATE KEY (d, n): ({d}, {n})";
KeyGenerationConsole.Items.Add($"p = {p}, q = {q}");
KeyGenerationConsole.Items.Add($"Modulus: n = {n}");
KeyGenerationConsole.Items.Add($"Euler's function: ф(n) = {phi}");
KeyGenerationConsole.Items.Add($"Public exponent: e = {e}");
KeyGenerationConsole.Items.Add($"Private exponent: d = {d}");
KeyGenerationConsole.Items.Add("-------------------------------------------------------------------------------------------");
KeyGenerationConsole.Items.Add(publickey);
KeyGenerationConsole.Items.Add(privatekey);
Clipboard.SetText($"{publickey}\r\n{privatekey}");
MessageBox.Show("Key pairs have been successfully generated and copied to clipboard. \nWarning: do not disclose the private key to any third-parties.", "Success", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
}
catch
{
MessageBox.Show("An error occured. Please check whether the filled in data are correct and try again.", "Error", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
}
}
private void Encrypt(BigInteger e, BigInteger n, string inputpath, string outputpath, bool b64enabled)
{
if (b64enabled)
{
string message = b64.ToBase(ReadBytes(inputpath));
List <string> result = RSACore.Encrypt(message, e, n);
WriteText(outputpath, result);
}
else
{
string message = "";
message = ReadTextStr(inputpath);
List <string> result = RSACore.Encrypt(message, e, n);
WriteText(outputpath, result);
}
}
private void Decrypt(BigInteger d, BigInteger n, string inputpath, string outputpath, bool b64enabled)
{
string decryptedmessage = "";
byte[] bytes;
List <string> encryptedmessage = new List <string>();
encryptedmessage = ReadText(inputpath);
decryptedmessage = RSACore.Decrypt(encryptedmessage, d, n);
if (b64enabled)
{
bytes = b64.FromBase(decryptedmessage);
WriteBytes(outputpath, bytes);
}
else
{
decryptedmessage = RSACore.Decrypt(encryptedmessage, d, n);
WriteText(outputpath, decryptedmessage);
}
}
private void AlphabetField_TextChanged(object sender, EventArgs e)
{
RSACore.SetAlphabet(AlphabetField1.Text);
}
