- Initial commit

Runtime/3rdParty/BouncyCastle/crypto/modes/gcm/Tables8kGcmMultiplier.cs

@@ -0,0 +1,93 @@
+#if !BESTHTTP_DISABLE_ALTERNATE_SSL && (!UNITY_WEBGL || UNITY_EDITOR)
+#pragma warning disable
+using System;
+
+using Best.HTTP.SecureProtocol.Org.BouncyCastle.Crypto.Utilities;
+using Best.HTTP.SecureProtocol.Org.BouncyCastle.Utilities;
+
+namespace Best.HTTP.SecureProtocol.Org.BouncyCastle.Crypto.Modes.Gcm
+{
+    public sealed class Tables8kGcmMultiplier
+        : IGcmMultiplier
+    {
+        private byte[] H;
+        private GcmUtilities.FieldElement[][] T;
+
+        public void Init(byte[] H)
+        {
+            if (T == null)
+            {
+                T = new GcmUtilities.FieldElement[2][];
+            }
+            else if (Arrays.AreEqual(this.H, H))
+            {
+                return;
+            }
+
+            this.H = Arrays.Clone(H);
+
+            for (int i = 0; i < 2; ++i)
+            {
+                GcmUtilities.FieldElement[] t = T[i] = new GcmUtilities.FieldElement[256];
+
+                // t[0] = 0
+
+                if (i == 0)
+                {
+                    // t[1] = H.p^7
+                    GcmUtilities.AsFieldElement(this.H, out t[1]);
+                    GcmUtilities.MultiplyP7(ref t[1]);
+                }
+                else
+                {
+                    // t[1] = T[i-1][1].p^8
+                    GcmUtilities.MultiplyP8(ref T[i - 1][1], out t[1]);
+                }
+
+                for (int n = 1; n < 128; ++n)
+                {
+                    // t[2.n] = t[n].p^-1
+                    GcmUtilities.DivideP(ref t[n], out t[n << 1]);
+
+                    // t[2.n + 1] = t[2.n] + t[1]
+                    GcmUtilities.Xor(ref t[n << 1], ref t[1], out t[(n << 1) + 1]);
+                }
+            }
+        }
+        uint[] z = new uint[4];
+
+        public void MultiplyH(byte[] x)
+        {
+            GcmUtilities.FieldElement[] T0 = T[0], T1 = T[1];
+
+            //GcmUtilities.FieldElement z;
+            //GcmUtilities.Xor(ref T0[x[14]], ref T1[x[15]], out z);
+            //for (int i = 12; i >= 0; i -= 2)
+            //{
+            //    GcmUtilities.MultiplyP16(ref z);
+            //    GcmUtilities.Xor(ref z, ref T0[x[i]]);
+            //    GcmUtilities.Xor(ref z, ref T1[x[i + 1]]);
+            //}
+            //GcmUtilities.AsBytes(ref z, x);
+
+            int vPos = x[15];
+            int uPos = x[14];
+            ulong z1 = T0[uPos].n1 ^ T1[vPos].n1;
+            ulong z0 = T0[uPos].n0 ^ T1[vPos].n0;
+
+            for (int i = 12; i >= 0; i -= 2)
+            {
+                vPos = x[i + 1];
+                uPos = x[i];
+
+                ulong c = z1 << 48;
+                z1 = T0[uPos].n1 ^ T1[vPos].n1 ^ ((z1 >> 16) | (z0 << 48));
+                z0 = T0[uPos].n0 ^ T1[vPos].n0 ^ (z0 >> 16) ^ c ^ (c >> 1) ^ (c >> 2) ^ (c >> 7);
+            }
+
+            GcmUtilities.AsBytes(z0, z1, x);
+        }
+    }
+}
+#pragma warning restore
+#endif