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using System;
using System.Collections;
using System.Text;
using NUnit.Framework;
using Org.BouncyCastle.Asn1;
using Org.BouncyCastle.Asn1.Sec;
using Org.BouncyCastle.Asn1.X9;
using Org.BouncyCastle.Crypto.EC;
using Org.BouncyCastle.Math;
using Org.BouncyCastle.Math.EC;
using Org.BouncyCastle.Security;
using Org.BouncyCastle.Utilities;
using Org.BouncyCastle.Utilities.Collections;
using Org.BouncyCastle.Utilities.Date;
namespace Org.BouncyCastle.Math.EC.Tests
{
/**
* Compares the performance of the the window NAF point multiplication against
* conventional point multiplication.
*/
[TestFixture, Explicit]
public class ECPointPerformanceTest
{
public const int PRE_ROUNDS = 100;
public const int NUM_ROUNDS = 1000;
private static string[] COORD_NAMES = new string[]{ "AFFINE", "HOMOGENEOUS", "JACOBIAN", "JACOBIAN-CHUDNOVSKY",
"JACOBIAN-MODIFIED", "LAMBDA-AFFINE", "LAMBDA-PROJECTIVE", "SKEWED" };
private void RandMult(string curveName)
{
X9ECParameters spec = ECNamedCurveTable.GetByName(curveName);
if (spec != null)
{
RandMult(curveName, spec);
}
spec = CustomNamedCurves.GetByName(curveName);
if (spec != null)
{
RandMult(curveName + " (custom)", spec);
}
}
private void RandMult(string label, X9ECParameters spec)
{
ECCurve C = spec.Curve;
ECPoint G = (ECPoint)spec.G;
BigInteger n = spec.N;
SecureRandom random = new SecureRandom();
random.SetSeed(DateTimeUtilities.CurrentUnixMs());
Console.WriteLine(label);
int[] coords = ECCurve.GetAllCoordinateSystems();
for (int i = 0; i < coords.Length; ++i)
{
int coord = coords[i];
if (C.SupportsCoordinateSystem(coord))
{
ECCurve c = C;
ECPoint g = G;
if (c.CoordinateSystem != coord)
{
c = C.Configure().SetCoordinateSystem(coord).Create();
g = c.ImportPoint(G);
}
double avgDuration = RandMult(random, g, n);
string coordName = COORD_NAMES[coord];
StringBuilder sb = new StringBuilder();
sb.Append(" ");
sb.Append(coordName);
for (int j = coordName.Length; j < 30; ++j)
{
sb.Append(' ');
}
sb.Append(": ");
sb.Append(avgDuration);
sb.Append("ms");
Console.WriteLine(sb.ToString());
}
}
}
private double RandMult(SecureRandom random, ECPoint g, BigInteger n)
{
BigInteger[] ks = new BigInteger[128];
for (int i = 0; i < ks.Length; ++i)
{
ks[i] = new BigInteger(n.BitLength - 1, random);
}
int ki = 0;
ECPoint p = g;
for (int i = 1; i <= PRE_ROUNDS; i++)
{
BigInteger k = ks[ki];
p = g.Multiply(k);
if (++ki == ks.Length)
{
ki = 0;
g = p;
}
}
long startTime = DateTimeUtilities.CurrentUnixMs();
for (int i = 1; i <= NUM_ROUNDS; i++)
{
BigInteger k = ks[ki];
p = g.Multiply(k);
if (++ki == ks.Length)
{
ki = 0;
g = p;
}
}
long endTime = DateTimeUtilities.CurrentUnixMs();
return (double)(endTime - startTime) / NUM_ROUNDS;
}
[Test]
public void TestMultiply()
{
ArrayList nameList = new ArrayList();
CollectionUtilities.AddRange(nameList, ECNamedCurveTable.Names);
string[] names = (string[])nameList.ToArray(typeof(string));
Array.Sort(names);
ISet oids = new HashSet();
foreach (string name in names)
{
DerObjectIdentifier oid = ECNamedCurveTable.GetOid(name);
if (!oids.Contains(oid))
{
oids.Add(oid);
RandMult(name);
}
}
}
public static void Main(string[] args)
{
new ECPointPerformanceTest().TestMultiply();
}
}
}
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