//подписываем сообщение
public string SingGen(byte[] h, BInteger d)
{
BInteger alpha = new BInteger(h);
BInteger e = alpha % n;
if (e == 0)
e = 1;
BInteger k = new BInteger();
ECPoint C = new ECPoint();
BInteger r = new BInteger();
BInteger s = new BInteger();
do
{
do
{
k.genRandomBits(n.bitCount(), new Random());
} while ((k < 0) || (k > n));
C = ECPoint.multiply(k, G);
r = C.x % n;
s = ((r * d) + (k * e)) % n;
} while ((r == 0) || (s == 0));
string Rvector = padding(r.ToHexString(), n.bitCount() / 4);
string Svector = padding(s.ToHexString(), n.bitCount() / 4);
return Rvector + Svector;
}
