private void button2_Click(object sender, EventArgs e)
{
try
{
var provider = new RSACryptoProvider(Int64.Parse(textBox5.Text), Int64.Parse(textBox4.Text), Int64.Parse(textBox3.Text), Int32.Parse(textBox7.Text), Int32.Parse(textBox6.Text));
textBox1.Text = provider.Decrypt(textBox2.Text);
}
catch (Exception Ex)
{
MessageBox.Show(Ex.Message);
}
}
public String Decrypt(String Cyphertext)
{
var numericalEquivalents = RSACryptoProvider.GetNumericalEquivalents(Cyphertext, this.CypherTextBlockSize);
String result = "";
foreach (var n in numericalEquivalents)
{
var decrypted = Math.Pow(n, this.DecryptionExponent, this.Modulus);
result += GetStringEquivalent(decrypted, PlainTextBlockSize);
}
return(result.ToLower());
}
public String Encrypt(String Plaintext)
{
var numericalEquivalents = RSACryptoProvider.GetNumericalEquivalents(Plaintext.ToUpper(), this.PlainTextBlockSize);
String result = "";
foreach (var n in numericalEquivalents)
{
var encrypted = Math.Pow(n, EncryptionExponent, Modulus);
result += GetStringEquivalent(encrypted, CypherTextBlockSize);
}
return(result);
}
