static public void Print(Formatter formatter, string curveName)
{
CurveNames curveEnum = GetCurveName(curveName);
ECParams ecp = ECRecommendedParameters.ecParams[(int)curveEnum];
ecp.Oid = ECRecommendedParameters.OID[(int)curveEnum];
formatter.PrintText("OID", ecp.Oid);
formatter.PrintBigInteger("p", "UCHAR", null, (ecp.parameters.Curve as FpCurve).Q);
formatter.PrintBigInteger("a", "UCHAR", null, ecp.parameters.Curve.A.ToBigInteger());
formatter.PrintBigInteger("b", "UCHAR", null, ecp.parameters.Curve.B.ToBigInteger());
formatter.PrintBigInteger("n", "UCHAR", null, ecp.parameters.N);
formatter.PrintBigInteger("h", "UCHAR", null, ecp.parameters.H);
formatter.PrintPoint("g", "UCHAR", null, ecp.parameters.G as FpPoint);
// g_1 ... g_n
for (int i = 1; i <= NumberOfPregeneratedGenerators; i++)
{
formatter.PrintPoint("g" + i, "UCHAR", null, ecp.g_i[i - 1], ecp.counter[i - 1]);
}
// g_t
formatter.PrintPoint("gt", "UCHAR", null, ecp.g_t, ecp.counter_t);
// g_d
formatter.PrintPoint("gd", "UCHAR", null, ecp.g_d, ecp.counter_d);
}
public static BigInteger FIPS_186_3_AnnexA_2_3(BigInteger p, BigInteger q, byte[] domain_parameter_seed, byte index, Formatter formater, out int count)
{
string hashAlg = null;
if (q.BitLength >= 512)
{
hashAlg = "SHA-512";
}
else if (q.BitLength >= 256)
{
hashAlg = "SHA-256";
}
else if (q.BitLength >= 160)
{
hashAlg = "SHA1";
}
else
{
throw new ArgumentException("q is too small");
}
HashAlgorithm hash = HashAlgorithm.Create(hashAlg);
BigInteger e = p.Subtract(BigInteger.One).Divide(q);
if (formater != null)
{
formater.PrintBigInteger("vr_e", "UCHAR", null, e);
}
count = 1;
while (count != 0)
{
int uIndex = 0;
byte[] U = new byte[domain_parameter_seed.Length + ggen.Length + 2];
Array.Copy(domain_parameter_seed, 0, U, uIndex, domain_parameter_seed.Length);
uIndex += domain_parameter_seed.Length;
Array.Copy(ggen, 0, U, uIndex, ggen.Length);
uIndex += ggen.Length;
U[U.Length - 2] = index;
U[U.Length - 1] = (byte)count;
BigInteger W = new BigInteger(1, hash.ComputeHash(U));
BigInteger g = W.ModPow(e, p);
if (g.CompareTo(BigInteger.Two) >= 0)
{
if (formater != null)
{
formater.PrintHex("vr_U", "UCHAR", null, U);
formater.PrintBigInteger("vr_W", "UCHAR", null, W);
}
return(g);
}
count++;
}
throw new Exception("Can't generate generator; max count reached");
}
public static FpPoint GetRandomPoint(string input, FpCurve curve, int index, Formatter formater, out int finalCounter)
{
int counter = 0;
ECFieldElement x = null, y = null, z = null;
while (y == null)
{
x = GetX(input, curve, index, counter);
z = x.Multiply(x.Square().Add(curve.A)).Add(curve.B);
if (z.ToBigInteger() == BigInteger.Zero)
{
y = z;
}
else
{
y = z.Sqrt(); // returns null if sqrt does not exist
}
counter++;
}
finalCounter = counter - 1;
if (formater != null)
{
formater.PrintBigInteger("vr_z", "UCAHR", null, z.ToBigInteger());
}
ECFieldElement yPrime = y.Negate();
return(new FpPoint(curve, x, y.ToBigInteger().CompareTo(yPrime.ToBigInteger()) < 0 ? y : yPrime));
}
internal static void Print(Formatter formatter, string groupName)
{
SGNames sgNameEnum = GetSGName(groupName);
SGParams sgp = SubgroupRecommendedParameters.sgParams[(int)sgNameEnum];
sgp.Oid = SubgroupRecommendedParameters.OID[(int)sgNameEnum];
formatter.PrintText("OID", "UCHAR", null, sgp.Oid);
formatter.PrintBigInteger("p", "UCHAR", null, sgp.p);
formatter.PrintBigInteger("q", "UCHAR", null, sgp.q);
formatter.PrintBigInteger("g", "UCHAR", null, sgp.g);
formatter.PrintHex("domainParamSeed", "UCHAR", null, sgp.domain_parameter_seed);
formatter.PrintBigInteger("e", "UCHAR", null, sgp.e);
// g_1 ... g_n
for (int i = 1; i <= NumberOfPregeneratedGenerators; i++)
{
formatter.PrintBigInteger("g" + i, "UCHAR", null, sgp.g_i[i - 1], sgp.counter[i - 1]);
}
// g_t
formatter.PrintBigInteger("gt", "UCHAR", null, sgp.g_t, sgp.counter_t);
// g_d
formatter.PrintBigInteger("gd", "UCHAR", null, sgp.g_d, sgp.counter_d);
}
