static void Main(string[] args)
{
ECKeyPair keyPair = KeyPairGenerator.Generate();
//Console.WriteLine(privateKey.ToString() + Environment.NewLine);
// Fake data
byte[] message = new BigInteger("968236873715988614170569073515315707566766479517").ToByteArray();
ECSigner signer = new ECSigner();
ECSignature signature = signer.Sign(keyPair, message);
message = new BigInteger("9682368737159881417056907351531570756676647951").ToByteArray();
ECVerifier verifier = new ECVerifier(keyPair);
bool isGood = verifier.Verify(signature, message);
Console.WriteLine(isGood);
}
public override byte[] ProcessBlock(
byte[] @in,
int inOff,
int inLen)
{
if (ForEncryption)
{
if (KeyPairGenerator != null)
{
EphemeralKeyPair ephKeyPair = KeyPairGenerator.Generate();
PrivParam = ephKeyPair.GetKeyPair().Private;
V = ephKeyPair.GetEncodedPublicKey();
}
}
else
{
if (KeyParser != null)
{
MemoryStream bIn = new MemoryStream(@in, inOff, inLen)
{
Position = SecureHeadSize
};
try
{
PubParam = KeyParser.ReadKey(bIn);
}
catch (IOException e)
{
throw new InvalidCipherTextException("unable to recover ephemeral public key: " + e.Message, e);
}
catch (ArgumentException e)
{
throw new InvalidCipherTextException("unable to recover ephemeral public key: " + e.Message, e);
}
int encLength = (inLen - (int)(bIn.Length - bIn.Position));
V = Arrays.CopyOfRange(@in, inOff + SecureHeadSize, inOff + encLength);
}
}
// Compute the common value and convert to byte array.
Agree.Init(PrivParam);
BigInteger z = Agree.CalculateAgreement(PubParam);
byte[] bigZ = BigIntegers.AsUnsignedByteArray(Agree.GetFieldSize(), z);
try
{
// Initialise the KDF.
KdfParameters kdfParam = new KdfParameters(bigZ, null);
Kdf.Init(kdfParam);
if (ForEncryption)
{
return(EncryptBlock(@in, inOff, inLen));
}
else
{
byte[] temp = new byte[inLen - SecureHeadSize];
Array.Copy(@in, inOff + SecureHeadSize, temp, 0, temp.Length);
return(DecryptBlock(temp, inOff, temp.Length));
}
}
finally
{
Arrays.Fill(bigZ, 0);
}
}
