static void Main()
{
const string original = "Very secret and important information that can not fall into the wrong hands.";
var hybrid = new HybridEncryption();
var rsaParams = new RSAWithRSAParameterKey();
rsaParams.AssignNewKey();
var digitalSignature = new DigitalSignature();
digitalSignature.AssignNewKey();
Console.WriteLine();
try
{
var encryptedBlock = hybrid.EncryptData(Encoding.UTF8.GetBytes(original), rsaParams,
digitalSignature);
var decrpyted = hybrid.DecryptData(encryptedBlock, rsaParams, digitalSignature);
Console.WriteLine("Original Message = " + original);
Console.WriteLine();
Console.WriteLine("Message After Decryption = " + Encoding.UTF8.GetString(decrpyted));
}
catch (CryptographicException ex)
{
Console.WriteLine("Error : " + ex.Message);
}
Console.ReadLine();
}
static void Main()
{
var document = Encoding.UTF8.GetBytes("Document to Sign");
byte[] hashedDocument;
using (var sha256 = SHA256.Create())
{
hashedDocument = sha256.ComputeHash(document);
}
var digitalSignature = new DigitalSignature();
digitalSignature.AssignNewKey();
var signature = digitalSignature.SignData(hashedDocument);
var verified = digitalSignature.VerifySignature(hashedDocument, signature);
Console.WriteLine();
Console.WriteLine(" Original Text = " +
Encoding.Default.GetString(document));
Console.WriteLine();
Console.WriteLine(" Digital Signature = " +
Convert.ToBase64String(signature));
Console.WriteLine();
Console.WriteLine(verified
? "The digital signature has been correctly verified."
: "The digital signature has NOT been correctly verified.");
Console.ReadLine();
}
