private void btnEncrypt_Click(object sender, EventArgs e)
{
if (this.comboBox1.SelectedIndex == 0)
{
string seckey = "tjlx4Xd_dXa6xsC3pq-uX92h";
DESEncryptor cryptor = new DESEncryptor(seckey);
this.txtEncrypt.Text = cryptor.Encrypt(this.txtPlain.Text);
}
if (this.comboBox1.SelectedIndex == 1)
{
RSAEncryptor cryptor = new RSAEncryptor(null, null);
this.txtEncrypt.Text = cryptor.Encrypt(this.txtPlain.Text);
}
if (this.comboBox1.SelectedIndex == 2) //HMACSHA256
{
RSAEncryptor cryptor = new RSAEncryptor(null, null);
this.txtEncrypt.Text = cryptor.Encrypt(this.txtPlain.Text);
}
else
{
string pwd = "800:6cc3cfc47dbd03c1cbc60398b0988a:186e5678c8b40921e56e847807b7de";
string[] arr = pwd.Split(':');
HMACSHA1Encryptor eb = new HMACSHA1Encryptor(arr[1], Convert.ToInt32(arr[0]));
string arreer = eb.Encrypt("1");
}
}
private void EncryptFile()
{
byte[] message = File.ReadAllBytes(openFileDialog.FileName);
BigInteger p = BigInteger.Parse(p_textBox.Text);
BigInteger q = BigInteger.Parse(q_textBox.Text);
BigInteger closedKey = BigInteger.Parse(closedKey_textBox.Text);
BigInteger eulerFunc = Helper.CalcEulerFunc(p, q);
BigInteger key = Helper.CalcMultiplicativeInverseKey(eulerFunc, closedKey);
ushort[] result = new ushort[message.Length];
try
{
result = RSAEncryptor.Encrypt(message, key, p * q);
}
catch (ArithmeticException ex)
{
MessageBox.Show(ex.Message, "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
return;
}
string resultText = "";
foreach (var num in result)
{
resultText += num.ToString() + " ";
}
result_textBox.Text = resultText;
if (saveFileDialog.ShowDialog() == DialogResult.OK)
{
File.WriteAllBytes(saveFileDialog.FileName, Helper.ToByteArray(result));
}
}
public void ThrowsIfMessageIsTooLongForSpecifiedKey(byte[] message, string pubKey)
{
// Arrange
var keyParser = new PemRSAKeyParser();
var target = new RSAEncryptor();
keyParser.TryParsePublic(pubKey, out RSAParameters publicKey);
// Act/Assert
var ex = Assert.ThrowsAny <CryptographicException>(() => target.Encrypt(message, publicKey));
}
public void EncryptsAndDecryptsMessages(byte[] message, string pubKey, string privKey)
{
// Arrange
var keyParser = new PemRSAKeyParser();
var target = new RSAEncryptor();
keyParser.TryParsePublic(pubKey, out RSAParameters publicKey);
keyParser.TryParsePrivate(privKey, out RSAParameters privateKey);
// Act
var encryptedMessage = target.Encrypt(message, publicKey);
var decryptedMessage = target.Decrypt(encryptedMessage, privateKey);
// Assert
Assert.Equal(message, decryptedMessage);
}