1 files changed, 72 insertions, 0 deletions
diff --git a/crypto/test/src/crypto/test/NistEccTest.cs b/crypto/test/src/crypto/test/NistEccTest.cs
new file mode 100644
index 000000000..7e658ff3e
--- /dev/null
+++ b/crypto/test/src/crypto/test/NistEccTest.cs
@@ -0,0 +1,72 @@
+using System.Collections.Generic;
+using System.IO;
+using System.Text.RegularExpressions;
+using NUnit.Framework;
+using Org.BouncyCastle.Math;
+using Org.BouncyCastle.Utilities.Test;
+
+namespace Org.BouncyCastle.Crypto.Tests
+{
+ public class NistEccTest
+ {
+ public IEnumerable<object[]> CollectTestVectors()
+ {
+ string curve = null;
+ BigInteger k = null;
+ BigInteger x = null;
+ BigInteger y = null;
+
+ using (StreamReader r = new StreamReader(SimpleTest.GetTestDataAsStream("crypto.nist_ecc.txt")))
+ {
+ string line;
+ while (null != (line = r.ReadLine()))
+ {
+ var capture = new Regex(@"^ ?(\w+):? =? ?(\w+)", RegexOptions.Compiled);
+ var data = capture.Match(line);
+
+ if (!data.Success) continue;
+ var nistKey = data.Groups[1].Value;
+ var nistValue = data.Groups[2].Value;
+ switch (nistKey)
+ {
+ case "Curve":
+ // Change curve name from LNNN to L-NNN ie: P256 to P-256
+ curve = $"{nistValue.Substring(0, 1)}-{nistValue.Substring(1)}";
+ break;
+ case "k":
+ k = new BigInteger(nistValue, 10);
+ break;
+ case "x":
+ x = new BigInteger(nistValue, radix: 16);
+ break;
+ case "y":
+ y = new BigInteger(nistValue, radix: 16);
+ break;
+ }
+
+ if (null != curve && null != k && null != x && null != y)
+ {
+ yield return new object[] {curve, k, x, y};
+ k = null;
+ x = null;
+ y = null;
+ }
+ }
+ }
+ }
+
+ [TestCaseSource(nameof(CollectTestVectors))]
+ public void TestMultiply(string curve, BigInteger k, BigInteger expectedX, BigInteger expectedY)
+ {
+ // Arrange
+ var x9EcParameters = Asn1.Nist.NistNamedCurves.GetByName(curve);
+
+ // Act
+ var ecPoint = x9EcParameters.G.Multiply(k).Normalize();
+
+ // Assert
+ Assert.AreEqual(expectedX, ecPoint.XCoord.ToBigInteger(), "Unexpected X Coordinate");
+ Assert.AreEqual(expectedY, ecPoint.YCoord.ToBigInteger(), "Unexpected Y Coordinate");
+ }
+ }
+}
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