private void TestSign()
{
RLWEParameters mpar = RLWEParamSets.RLWEN512Q12289;
RLWEKeyGenerator mkgen = new RLWEKeyGenerator(mpar);
IAsymmetricKeyPair akp = mkgen.GenerateKeyPair();
using (RLWESign sgn = new RLWESign(mpar))
{
sgn.Initialize(akp.PublicKey);
int sz = sgn.MaxPlainText;
byte[] data = new byte[200];
new VTDev.Libraries.CEXEngine.Crypto.Prng.CSPRng().GetBytes(data);
byte[] code = sgn.Sign(data, 0, data.Length);
sgn.Initialize(akp.PrivateKey);
if (!sgn.Verify(data, 0, data.Length, code))
{
throw new Exception("EncryptionKey: private key comparison test failed!");
}
OnProgress(new TestEventArgs("Passed byte sign and verify"));
sgn.Initialize(akp.PublicKey);
code = sgn.Sign(new MemoryStream(data));
sgn.Initialize(akp.PrivateKey);
if (!sgn.Verify(new MemoryStream(data), code))
{
throw new Exception("EncryptionKey: private key comparison test failed!");
}
OnProgress(new TestEventArgs("Passed stream sign and verify"));
}
}
//signs a message using the internal private and public keys
public string SignMessage(string message)
{
RLWEParameters mpar = RLWEParamSets.RLWEN512Q12289;
string signature = "";
using (RLWESign sgn = new RLWESign(mpar))
{
sgn.Initialize(_privateKey.Key);
byte[] messageBytes = Encoding.UTF8.GetBytes(message);
byte[] signatureBytes = sgn.Sign(messageBytes, 0, messageBytes.Length);
signature = Convert.ToBase64String(signatureBytes);
}
return(signature);
}
//verify provided message with the signature and public key provided
public bool VerifySignature(string message, string signature, IPublicKey publicKey)
{
bool result = false;
RLWEParameters mpar = RLWEParamSets.RLWEN512Q12289;
using (RLWESign sgn = new RLWESign(mpar))
{
sgn.Initialize(((PublicKey)publicKey).Key);
byte[] messageBytes = Encoding.UTF8.GetBytes(message);
byte[] signatureBytes = Convert.FromBase64String(signature);
result = sgn.Verify(messageBytes, 0, messageBytes.Length, signatureBytes);
}
return(result);
}
//signs a message using the private and public keys provided
public string SignMessage(string message, IPrivateKey privateKey, IPublicKey publicKey = null)
{
//NB: public key isn't required by this implementation, so is initialized to null
RLWEParameters mpar = RLWEParamSets.RLWEN512Q12289;
string signature = "";
using (RLWESign sgn = new RLWESign(mpar))
{
sgn.Initialize(((PrivateKey)(privateKey)).Key);
byte[] messageBytes = Encoding.UTF8.GetBytes(message);
byte[] signatureBytes = sgn.Sign(messageBytes, 0, messageBytes.Length);
signature = Convert.ToBase64String(signatureBytes);
}
return(signature);
}