Add experimental support for GLV Type A endomorphisms

1 files changed, 20 insertions, 0 deletions

diff --git a/crypto/src/math/ec/ScaleXNegateYPointMap.cs b/crypto/src/math/ec/ScaleXNegateYPointMap.cs
new file mode 100644
index 000000000..b0466a633
--- /dev/null
+++ b/crypto/src/math/ec/ScaleXNegateYPointMap.cs
@@ -0,0 +1,20 @@
+using System;
+
+namespace Org.BouncyCastle.Math.EC
+{
+    public class ScaleXNegateYPointMap
+        : ECPointMap
+    {
+        protected readonly ECFieldElement scale;
+
+        public ScaleXNegateYPointMap(ECFieldElement scale)
+        {
+            this.scale = scale;
+        }
+
+        public virtual ECPoint Map(ECPoint p)
+        {
+            return p.ScaleXNegateY(scale);
+        }
+    }
+}