public string ExtractMessage(DigitalSignatureResult signatureResult)
{
byte[] cipherTextBytes = Convert.FromBase64String(signatureResult.CipherText);
byte[] signatureBytes = Convert.FromBase64String(signatureResult.SignatureText);
byte[] recomputedHash = ComputeHashForMessage(cipherTextBytes);
VerifySignature(recomputedHash, signatureBytes);
byte[] plainTextBytes = GetReceiverCipher().Decrypt(cipherTextBytes, false);
return(Encoding.UTF8.GetString(plainTextBytes));
}
static void Main(string[] args)
{
Sender sender = new Sender();
DigitalSignatureResult res = sender.BuildSignedMessage("Hello digital sig!");
Console.WriteLine(res.CipherText);
Console.WriteLine(res.SignatureText);
String decryptedText = new Receiver().ExtractMessage(res);
Console.WriteLine(decryptedText);
Console.ReadKey();
}