- Initial commit

Runtime/3rdParty/BouncyCastle/math/ec/custom/sec/SecT239K1Curve.cs

@@ -0,0 +1,187 @@
+#if !BESTHTTP_DISABLE_ALTERNATE_SSL && (!UNITY_WEBGL || UNITY_EDITOR)
+#pragma warning disable
+using System;
+
+using Best.HTTP.SecureProtocol.Org.BouncyCastle.Math.EC.Multiplier;
+using Best.HTTP.SecureProtocol.Org.BouncyCastle.Math.Raw;
+using Best.HTTP.SecureProtocol.Org.BouncyCastle.Utilities.Encoders;
+
+namespace Best.HTTP.SecureProtocol.Org.BouncyCastle.Math.EC.Custom.Sec
+{
+    internal class SecT239K1Curve
+        : AbstractF2mCurve
+    {
+        private const int SECT239K1_DEFAULT_COORDS = COORD_LAMBDA_PROJECTIVE;
+        private const int SECT239K1_FE_LONGS = 4;
+        private static readonly ECFieldElement[] SECT239K1_AFFINE_ZS = new ECFieldElement[] { new SecT239FieldElement(BigInteger.One) };
+
+        protected readonly SecT239K1Point m_infinity;
+
+        public SecT239K1Curve()
+            : base(239, 158, 0, 0)
+        {
+            this.m_infinity = new SecT239K1Point(this, null, null);
+
+            this.m_a = FromBigInteger(BigInteger.Zero);
+            this.m_b = FromBigInteger(BigInteger.One);
+            this.m_order = new BigInteger(1, Hex.DecodeStrict("2000000000000000000000000000005A79FEC67CB6E91F1C1DA800E478A5"));
+            this.m_cofactor = BigInteger.ValueOf(4);
+
+            this.m_coord = SECT239K1_DEFAULT_COORDS;
+        }
+
+        protected override ECCurve CloneCurve()
+        {
+            return new SecT239K1Curve();
+        }
+
+        public override bool SupportsCoordinateSystem(int coord)
+        {
+            switch (coord)
+            {
+            case COORD_LAMBDA_PROJECTIVE:
+                return true;
+            default:
+                return false;
+            }
+        }
+
+        protected override ECMultiplier CreateDefaultMultiplier()
+        {
+            return new WTauNafMultiplier();
+        }
+
+        public override ECPoint Infinity
+        {
+            get { return m_infinity; }
+        }
+
+        public override int FieldSize
+        {
+            get { return 239; }
+        }
+
+        public override ECFieldElement FromBigInteger(BigInteger x)
+        {
+            return new SecT239FieldElement(x);
+        }
+
+        protected internal override ECPoint CreateRawPoint(ECFieldElement x, ECFieldElement y)
+        {
+            return new SecT239K1Point(this, x, y);
+        }
+
+        protected internal override ECPoint CreateRawPoint(ECFieldElement x, ECFieldElement y, ECFieldElement[] zs)
+        {
+            return new SecT239K1Point(this, x, y, zs);
+        }
+
+        public override bool IsKoblitz
+        {
+            get { return true; }
+        }
+
+        public virtual int M
+        {
+            get { return 239; }
+        }
+
+        public virtual bool IsTrinomial
+        {
+            get { return true; }
+        }
+
+        public virtual int K1
+        {
+            get { return 158; }
+        }
+
+        public virtual int K2
+        {
+            get { return 0; }
+        }
+
+        public virtual int K3
+        {
+            get { return 0; }
+        }
+
+        public override ECLookupTable CreateCacheSafeLookupTable(ECPoint[] points, int off, int len)
+        {
+            ulong[] table = new ulong[len * SECT239K1_FE_LONGS * 2];
+            {
+                int pos = 0;
+                for (int i = 0; i < len; ++i)
+                {
+                    ECPoint p = points[off + i];
+                    Nat256.Copy64(((SecT239FieldElement)p.RawXCoord).x, 0, table, pos); pos += SECT239K1_FE_LONGS;
+                    Nat256.Copy64(((SecT239FieldElement)p.RawYCoord).x, 0, table, pos); pos += SECT239K1_FE_LONGS;
+                }
+            }
+
+            return new SecT239K1LookupTable(this, table, len);
+        }
+
+        private class SecT239K1LookupTable
+            : AbstractECLookupTable
+        {
+            private readonly SecT239K1Curve m_outer;
+            private readonly ulong[] m_table;
+            private readonly int m_size;
+
+            internal SecT239K1LookupTable(SecT239K1Curve outer, ulong[] table, int size)
+            {
+                this.m_outer = outer;
+                this.m_table = table;
+                this.m_size = size;
+            }
+
+            public override int Size
+            {
+                get { return m_size; }
+            }
+
+            public override ECPoint Lookup(int index)
+            {
+                ulong[] x = Nat256.Create64(), y = Nat256.Create64();
+                int pos = 0;
+
+                for (int i = 0; i < m_size; ++i)
+                {
+                    ulong MASK = (ulong)(long)(((i ^ index) - 1) >> 31);
+
+                    for (int j = 0; j < SECT239K1_FE_LONGS; ++j)
+                    {
+                        x[j] ^= m_table[pos + j] & MASK;
+                        y[j] ^= m_table[pos + SECT239K1_FE_LONGS + j] & MASK;
+                    }
+
+                    pos += (SECT239K1_FE_LONGS * 2);
+                }
+
+                return CreatePoint(x, y);
+            }
+
+            public override ECPoint LookupVar(int index)
+            {
+                ulong[] x = Nat256.Create64(), y = Nat256.Create64();
+                int pos = index * SECT239K1_FE_LONGS * 2;
+
+                for (int j = 0; j < SECT239K1_FE_LONGS; ++j)
+                {
+                    x[j] = m_table[pos + j];
+                    y[j] = m_table[pos + SECT239K1_FE_LONGS + j];
+                }
+
+                return CreatePoint(x, y);
+            }
+
+            private ECPoint CreatePoint(ulong[] x, ulong[] y)
+            {
+                return m_outer.CreateRawPoint(new SecT239FieldElement(x), new SecT239FieldElement(y), SECT239K1_AFFINE_ZS);
+            }
+        }
+    }
+}
+#pragma warning restore
+#endif