- Initial commit

Runtime/3rdParty/BouncyCastle/crypto/modes/gcm/Tables4kGcmMultiplier.cs

@@ -0,0 +1,72 @@
+#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 class Tables4kGcmMultiplier
+        : IGcmMultiplier
+    {
+        private byte[] H;
+        private GcmUtilities.FieldElement[] T;
+
+        public void Init(byte[] H)
+        {
+            if (T == null)
+            {
+                T = new GcmUtilities.FieldElement[256];
+            }
+            else if (Arrays.AreEqual(this.H, H))
+            {
+                return;
+            }
+
+            this.H = Arrays.Clone(H);
+
+            // T[0] = 0
+
+            // T[1] = H.p^7
+            GcmUtilities.AsFieldElement(this.H, out T[1]);
+            GcmUtilities.MultiplyP7(ref 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]);
+            }
+        }
+
+        public void MultiplyH(byte[] x)
+        {
+            //GcmUtilities.FieldElement z = T[x[15]];
+            //for (int i = 14; i >= 0; --i)
+            //{
+            //    GcmUtilities.MultiplyP8(ref z);
+            //    GcmUtilities.Xor(ref z, ref T[x[i]]);
+            //}
+            //GcmUtilities.AsBytes(ref z, x);
+
+            int pos = x[15];
+            ulong z0 = T[pos].n0, z1 = T[pos].n1;
+
+            for (int i = 14; i >= 0; --i)
+            {
+                pos = x[i];
+
+                ulong c = z1 << 56;
+                z1 = T[pos].n1 ^ ((z1 >> 8) | (z0 << 56));
+                z0 = T[pos].n0 ^ (z0 >> 8) ^ c ^ (c >> 1) ^ (c >> 2) ^ (c >> 7);
+            }
+
+            GcmUtilities.AsBytes(z0, z1, x);
+        }
+    }
+}
+#pragma warning restore
+#endif