diff options
Diffstat (limited to 'crypto/test')
| -rw-r--r-- | crypto/test/src/math/ec/test/AllTests.cs | 9 | ||||
| -rw-r--r-- | crypto/test/src/math/ec/test/ECAlgorithmsTest.cs | 151 | ||||
| -rw-r--r-- | crypto/test/src/math/ec/test/ECPointTest.cs | 2 |
3 files changed, 157 insertions, 5 deletions
diff --git a/crypto/test/src/math/ec/test/AllTests.cs b/crypto/test/src/math/ec/test/AllTests.cs index f5d7d2249..d4c7dc768 100644 --- a/crypto/test/src/math/ec/test/AllTests.cs +++ b/crypto/test/src/math/ec/test/AllTests.cs @@ -8,7 +8,7 @@ namespace Org.BouncyCastle.Math.EC.Tests public class AllTests { public static void Main( - string[] args) + string[] args) { // junit.textui.TestRunner.run(suite()); EventListener el = new NullListener(); @@ -17,11 +17,12 @@ namespace Org.BouncyCastle.Math.EC.Tests public static TestSuite suite() { - TestSuite suite = new TestSuite("EC Math tests"); + TestSuite suite = new TestSuite("EC Math tests"); - suite.Add(new ECPointTest()); + suite.Add(new ECAlgorithmsTest()); + suite.Add(new ECPointTest()); - return suite; + return suite; } } } diff --git a/crypto/test/src/math/ec/test/ECAlgorithmsTest.cs b/crypto/test/src/math/ec/test/ECAlgorithmsTest.cs new file mode 100644 index 000000000..a5d4abcd8 --- /dev/null +++ b/crypto/test/src/math/ec/test/ECAlgorithmsTest.cs @@ -0,0 +1,151 @@ +using System; +using System.Collections; + +using NUnit.Framework; + +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; + +namespace Org.BouncyCastle.Math.EC.Tests +{ + [TestFixture] + public class ECAlgorithmsTest + { + private const int SCALE = 8; + private static readonly SecureRandom RND = new SecureRandom(); + + [Test] + public void TestSumOfMultiplies() + { + foreach (X9ECParameters x9 in GetTestCurves()) + { + ECPoint[] points = new ECPoint[SCALE]; + BigInteger[] scalars = new BigInteger[SCALE]; + for (int i = 0; i < SCALE; ++i) + { + points[i] = GetRandomPoint(x9); + scalars[i] = GetRandomScalar(x9); + } + + ECPoint u = x9.Curve.Infinity; + for (int i = 0; i < SCALE; ++i) + { + u = u.Add(points[i].Multiply(scalars[i])); + + ECPoint v = ECAlgorithms.SumOfMultiplies(CopyPoints(points, i + 1), CopyScalars(scalars, i + 1)); + + ECPoint[] results = new ECPoint[] { u, v }; + x9.Curve.NormalizeAll(results); + + AssertPointsEqual("ECAlgorithms.SumOfMultiplies is incorrect", results[0], results[1]); + } + } + } + + [Test] + public void TestSumOfTwoMultiplies() + { + foreach (X9ECParameters x9 in GetTestCurves()) + { + ECPoint p = GetRandomPoint(x9); + BigInteger a = GetRandomScalar(x9); + + for (int i = 0; i < SCALE; ++i) + { + ECPoint q = GetRandomPoint(x9); + BigInteger b = GetRandomScalar(x9); + + ECPoint u = p.Multiply(a).Add(q.Multiply(b)); + ECPoint v = ECAlgorithms.ShamirsTrick(p, a, q, b); + ECPoint w = ECAlgorithms.SumOfTwoMultiplies(p, a, q, b); + + ECPoint[] results = new ECPoint[] { u, v, w }; + x9.Curve.NormalizeAll(results); + + AssertPointsEqual("ECAlgorithms.ShamirsTrick is incorrect", results[0], results[1]); + AssertPointsEqual("ECAlgorithms.SumOfTwoMultiplies is incorrect", results[0], results[2]); + + p = q; + a = b; + } + } + } + + private void AssertPointsEqual(string message, ECPoint a, ECPoint b) + { + Assert.AreEqual(a, b, message); + } + + private ECPoint[] CopyPoints(ECPoint[] ps, int len) + { + ECPoint[] result = new ECPoint[len]; + Array.Copy(ps, 0, result, 0, len); + return result; + } + + private BigInteger[] CopyScalars(BigInteger[] ks, int len) + { + BigInteger[] result = new BigInteger[len]; + Array.Copy(ks, 0, result, 0, len); + return result; + } + + private ECPoint GetRandomPoint(X9ECParameters x9) + { + return x9.G.Multiply(GetRandomScalar(x9)); + } + + private BigInteger GetRandomScalar(X9ECParameters x9) + { + return new BigInteger(x9.N.BitLength, RND); + } + + private IList GetTestCurves() + { + ArrayList x9s = new ArrayList(); + ArrayList names = new ArrayList(); + CollectionUtilities.AddRange(names, ECNamedCurveTable.Names); + CollectionUtilities.AddRange(names, CustomNamedCurves.Names); + foreach (string name in names) + { + X9ECParameters x9 = ECNamedCurveTable.GetByName(name); + if (x9 != null) + { + AddTestCurves(x9s, x9); + } + + x9 = CustomNamedCurves.GetByName(name); + if (x9 != null) + { + AddTestCurves(x9s, x9); + } + } + return x9s; + } + + private void AddTestCurves(IList x9s, X9ECParameters x9) + { + ECCurve curve = x9.Curve; + + int[] coords = ECCurve.GetAllCoordinateSystems(); + for (int i = 0; i < coords.Length; ++i) + { + int coord = coords[i]; + if (curve.CoordinateSystem == coord) + { + x9s.Add(x9); + } + else if (curve.SupportsCoordinateSystem(coord)) + { + ECCurve c = curve.Configure().SetCoordinateSystem(coord).Create(); + x9s.Add(new X9ECParameters(c, c.ImportPoint(x9.G), x9.N, x9.H)); + } + } + } + } +} diff --git a/crypto/test/src/math/ec/test/ECPointTest.cs b/crypto/test/src/math/ec/test/ECPointTest.cs index 4bad914fd..1a23e0bc7 100644 --- a/crypto/test/src/math/ec/test/ECPointTest.cs +++ b/crypto/test/src/math/ec/test/ECPointTest.cs @@ -530,7 +530,7 @@ namespace Org.BouncyCastle.Math.EC.Tests private void AssertPointsEqual(string message, ECPoint a, ECPoint b) { - Assert.AreEqual(a, b, message); + Assert.AreEqual(a, b, message); } } } |