Custom curves for secp128r1 and secp160r1/r2/k1

1 files changed, 78 insertions, 0 deletions

diff --git a/crypto/src/math/ec/custom/sec/SecP160R2Curve.cs b/crypto/src/math/ec/custom/sec/SecP160R2Curve.cs
new file mode 100644
index 000000000..100561453
--- /dev/null
+++ b/crypto/src/math/ec/custom/sec/SecP160R2Curve.cs
@@ -0,0 +1,78 @@
+using System;
+
+using Org.BouncyCastle.Utilities.Encoders;
+
+namespace Org.BouncyCastle.Math.EC.Custom.Sec
+{
+    internal class SecP160R2Curve
+        : AbstractFpCurve
+    {
+        public static readonly BigInteger q = new BigInteger(1,
+            Hex.Decode("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFAC73"));
+
+        private const int SecP160R2_DEFAULT_COORDS = COORD_JACOBIAN;
+
+        protected readonly SecP160R2Point m_infinity;
+
+        public SecP160R2Curve()
+            : base(q)
+        {
+            this.m_infinity = new SecP160R2Point(this, null, null);
+
+            this.m_a = FromBigInteger(new BigInteger(1,
+                Hex.Decode("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFAC70")));
+            this.m_b = FromBigInteger(new BigInteger(1,
+                Hex.Decode("B4E134D3FB59EB8BAB57274904664D5AF50388BA")));
+            this.m_order = new BigInteger(1, Hex.Decode("0100000000000000000000351EE786A818F3A1A16B"));
+            this.m_cofactor = BigInteger.One;
+
+            this.m_coord = SecP160R2_DEFAULT_COORDS;
+        }
+
+        protected override ECCurve CloneCurve()
+        {
+            return new SecP160R2Curve();
+        }
+
+        public override bool SupportsCoordinateSystem(int coord)
+        {
+            switch (coord)
+            {
+            case COORD_JACOBIAN:
+                return true;
+            default:
+                return false;
+            }
+        }
+
+        public virtual BigInteger Q
+        {
+            get { return q; }
+        }
+
+        public override ECPoint Infinity
+        {
+            get { return m_infinity; }
+        }
+
+        public override int FieldSize
+        {
+            get { return q.BitLength; }
+        }
+
+        public override ECFieldElement FromBigInteger(BigInteger x)
+        {
+            return new SecP160R2FieldElement(x);
+        }
+
+        protected internal override ECPoint CreateRawPoint(ECFieldElement x, ECFieldElement y, bool withCompression)
+        {
+            return new SecP160R2Point(this, x, y, withCompression);
+        }
+
+        protected internal override ECPoint CreateRawPoint(ECFieldElement x, ECFieldElement y, ECFieldElement[] zs, bool withCompression)
+        {
+            return new SecP160R2Point(this, x, y, zs, withCompression);
+        }
+    }
+}