From 4fd68a3d37b113ef9809228e80f5aeb45208813f Mon Sep 17 00:00:00 2001
From: Peter Dettman <peter.dettman@bouncycastle.org>
Date: Fri, 24 Jan 2014 15:31:13 +0700
Subject: Run point test on all supported coordinate systems

---
 crypto/test/src/math/ec/test/ECPointTest.cs | 49 +++++++++++++++++++++--------
 1 file changed, 36 insertions(+), 13 deletions(-)

diff --git a/crypto/test/src/math/ec/test/ECPointTest.cs b/crypto/test/src/math/ec/test/ECPointTest.cs
index b4cabec78..faaca7f19 100644
--- a/crypto/test/src/math/ec/test/ECPointTest.cs
+++ b/crypto/test/src/math/ec/test/ECPointTest.cs
@@ -426,17 +426,10 @@ namespace Org.BouncyCastle.Math.EC.Tests
             AssertPointsEqual("Error decoding compressed point", p, decComp);
         }
 
-        private void ImplAddSubtractMultiplyTwiceEncodingTest(X9ECParameters x9ECParameters)
+        private void ImplAddSubtractMultiplyTwiceEncodingTest(ECCurve curve, ECPoint q, BigInteger n)
         {
-            BigInteger n = x9ECParameters.N;
-
-            // The generator is multiplied by random b to get random q
-            BigInteger b = new BigInteger(n.BitLength, secRand);
-            ECPoint g = x9ECParameters.G;
-            ECPoint q = g.Multiply(b).Normalize();
-
             // Get point at infinity on the curve
-            ECPoint infinity = x9ECParameters.Curve.Infinity;
+            ECPoint infinity = curve.Infinity;
 
             ImplTestAddSubtract(q, infinity);
             ImplTestMultiply(q, n.BitLength);
@@ -444,6 +437,36 @@ namespace Org.BouncyCastle.Math.EC.Tests
             ImplTestEncoding(q);
         }
 
+        private void ImplAddSubtractMultiplyTwiceEncodingTestAllCoords(X9ECParameters x9ECParameters)
+        {
+            BigInteger n = x9ECParameters.N;
+            ECPoint G = x9ECParameters.G;
+            ECCurve C = x9ECParameters.Curve;
+
+            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);
+                    }
+
+                    // The generator is multiplied by random b to get random q
+                    BigInteger b = new BigInteger(n.BitLength, secRand);
+                    ECPoint q = g.Multiply(b).Normalize();
+
+                    ImplAddSubtractMultiplyTwiceEncodingTest(c, q, n);
+                }
+            }
+        }
+
         /**
          * Calls <code>implTestAddSubtract()</code>,
          * <code>implTestMultiply</code> and <code>implTestEncoding</code> for
@@ -452,15 +475,15 @@ namespace Org.BouncyCastle.Math.EC.Tests
         [Test]
         public void TestAddSubtractMultiplyTwiceEncoding()
         {
-            foreach (string name in SecNamedCurves.Names)
+            foreach (string name in ECNamedCurveTable.Names)
             {
-                X9ECParameters x9ECParameters = SecNamedCurves.GetByName(name);
-                ImplAddSubtractMultiplyTwiceEncodingTest(x9ECParameters);
+                X9ECParameters x9ECParameters = ECNamedCurveTable.GetByName(name);
+                ImplAddSubtractMultiplyTwiceEncodingTestAllCoords(x9ECParameters);
 
                 x9ECParameters = CustomNamedCurves.GetByName(name);
                 if (x9ECParameters != null)
                 {
-                    ImplAddSubtractMultiplyTwiceEncodingTest(x9ECParameters);
+                    ImplAddSubtractMultiplyTwiceEncodingTestAllCoords(x9ECParameters);
                 }
             }
         }
-- 
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