public virtual void Init(bool forSigning, ICipherParameters parameters)
{
ICipherParameters baseParam;
byte[] userID;
if (parameters is ParametersWithID)
{
baseParam = ((ParametersWithID)parameters).Parameters;
userID = ((ParametersWithID)parameters).GetID();
}
else
{
baseParam = parameters;
userID = Hex.Decode("31323334353637383132333435363738"); // the default value (ASCII "1234567812345678")
}
if (forSigning)
{
if (baseParam is ParametersWithRandom)
{
ParametersWithRandom rParam = (ParametersWithRandom)baseParam;
ecKey = (ECKeyParameters)rParam.Parameters;
ecParams = ecKey.Parameters;
kCalculator.Init(ecParams.N, rParam.Random);
}
else
{
ecKey = (ECKeyParameters)baseParam;
ecParams = ecKey.Parameters;
kCalculator.Init(ecParams.N, new SecureRandom());
}
pubPoint = CreateBasePointMultiplier().Multiply(ecParams.G, ((ECPrivateKeyParameters)ecKey).D).Normalize();
}
else
{
ecKey = (ECKeyParameters)baseParam;
ecParams = ecKey.Parameters;
pubPoint = ((ECPublicKeyParameters)ecKey).Q;
}
digest.Reset();
z = GetZ(userID);
digest.BlockUpdate(z, 0, z.Length);
}