- Initial commit

Runtime/3rdParty/BouncyCastle/math/ec/custom/sec/SecP224K1Curve.cs

@@ -0,0 +1,172 @@
+#if !BESTHTTP_DISABLE_ALTERNATE_SSL && (!UNITY_WEBGL || UNITY_EDITOR)
+#pragma warning disable
+using System;
+
+using Best.HTTP.SecureProtocol.Org.BouncyCastle.Math.Raw;
+using Best.HTTP.SecureProtocol.Org.BouncyCastle.Security;
+using Best.HTTP.SecureProtocol.Org.BouncyCastle.Utilities.Encoders;
+
+namespace Best.HTTP.SecureProtocol.Org.BouncyCastle.Math.EC.Custom.Sec
+{
+    internal class SecP224K1Curve
+        : AbstractFpCurve
+    {
+        public static readonly BigInteger q = SecP224K1FieldElement.Q;
+
+        private const int SECP224K1_DEFAULT_COORDS = COORD_JACOBIAN;
+        private const int SECP224K1_FE_INTS = 7;
+        private static readonly ECFieldElement[] SECP224K1_AFFINE_ZS = new ECFieldElement[] { new SecP224K1FieldElement(BigInteger.One) };
+
+        protected readonly SecP224K1Point m_infinity;
+
+        public SecP224K1Curve()
+            : base(q)
+        {
+            this.m_infinity = new SecP224K1Point(this, null, null);
+
+            this.m_a = FromBigInteger(BigInteger.Zero);
+            this.m_b = FromBigInteger(BigInteger.ValueOf(5));
+            this.m_order = new BigInteger(1, Hex.DecodeStrict("010000000000000000000000000001DCE8D2EC6184CAF0A971769FB1F7"));
+            this.m_cofactor = BigInteger.One;
+            this.m_coord = SECP224K1_DEFAULT_COORDS;
+        }
+
+        protected override ECCurve CloneCurve()
+        {
+            return new SecP224K1Curve();
+        }
+
+        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 SecP224K1FieldElement(x);
+        }
+
+        protected internal override ECPoint CreateRawPoint(ECFieldElement x, ECFieldElement y)
+        {
+            return new SecP224K1Point(this, x, y);
+        }
+
+        protected internal override ECPoint CreateRawPoint(ECFieldElement x, ECFieldElement y, ECFieldElement[] zs)
+        {
+            return new SecP224K1Point(this, x, y, zs);
+        }
+
+        public override ECLookupTable CreateCacheSafeLookupTable(ECPoint[] points, int off, int len)
+        {
+            uint[] table = new uint[len * SECP224K1_FE_INTS * 2];
+            {
+                int pos = 0;
+                for (int i = 0; i < len; ++i)
+                {
+                    ECPoint p = points[off + i];
+                    Nat224.Copy(((SecP224K1FieldElement)p.RawXCoord).x, 0, table, pos); pos += SECP224K1_FE_INTS;
+                    Nat224.Copy(((SecP224K1FieldElement)p.RawYCoord).x, 0, table, pos); pos += SECP224K1_FE_INTS;
+                }
+            }
+
+            return new SecP224K1LookupTable(this, table, len);
+        }
+
+        public override ECFieldElement RandomFieldElement(SecureRandom r)
+        {
+            uint[] x = Nat224.Create();
+            SecP224K1Field.Random(r, x);
+            return new SecP224K1FieldElement(x);
+        }
+
+        public override ECFieldElement RandomFieldElementMult(SecureRandom r)
+        {
+            uint[] x = Nat224.Create();
+            SecP224K1Field.RandomMult(r, x);
+            return new SecP224K1FieldElement(x);
+        }
+
+        private class SecP224K1LookupTable
+            : AbstractECLookupTable
+        {
+            private readonly SecP224K1Curve m_outer;
+            private readonly uint[] m_table;
+            private readonly int m_size;
+
+            internal SecP224K1LookupTable(SecP224K1Curve outer, uint[] 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)
+            {
+                uint[] x = Nat224.Create(), y = Nat224.Create();
+                int pos = 0;
+
+                for (int i = 0; i < m_size; ++i)
+                {
+                    uint MASK = (uint)(((i ^ index) - 1) >> 31);
+
+                    for (int j = 0; j < SECP224K1_FE_INTS; ++j)
+                    {
+                        x[j] ^= m_table[pos + j] & MASK;
+                        y[j] ^= m_table[pos + SECP224K1_FE_INTS + j] & MASK;
+                    }
+
+                    pos += (SECP224K1_FE_INTS * 2);
+                }
+
+                return CreatePoint(x, y);
+            }
+
+            public override ECPoint LookupVar(int index)
+            {
+                uint[] x = Nat224.Create(), y = Nat224.Create();
+                int pos = index * SECP224K1_FE_INTS * 2;
+
+                for (int j = 0; j < SECP224K1_FE_INTS; ++j)
+                {
+                    x[j] = m_table[pos + j];
+                    y[j] = m_table[pos + SECP224K1_FE_INTS + j];
+                }
+
+                return CreatePoint(x, y);
+            }
+
+            private ECPoint CreatePoint(uint[] x, uint[] y)
+            {
+                return m_outer.CreateRawPoint(new SecP224K1FieldElement(x), new SecP224K1FieldElement(y), SECP224K1_AFFINE_ZS);
+            }
+        }
+    }
+}
+#pragma warning restore
+#endif