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- #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 Tables64kGcmMultiplier
- : IGcmMultiplier
- {
- private byte[] H;
- private GcmUtilities.FieldElement[][] T;
- public void Init(byte[] H)
- {
- if (T == null)
- {
- T = new GcmUtilities.FieldElement[16][];
- }
- else if (Arrays.AreEqual(this.H, H))
- {
- return;
- }
- this.H = Arrays.Clone(H);
- for (int i = 0; i < 16; ++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]);
- }
- }
- }
- public void MultiplyH(byte[] x)
- {
- //GcmUtilities.FieldElement z = T[15][x[15]];
- //for (int i = 14; i >= 0; --i)
- //{
- // GcmUtilities.Xor(ref z, ref T[i][x[i]]);
- //}
- //GcmUtilities.AsBytes(ref z, x);
- GcmUtilities.FieldElement[] t = T[15];
- int tPos = x[15];
- ulong z0 = t[tPos].n0, z1 = t[tPos].n1;
- for (int i = 14; i >= 0; --i)
- {
- t = T[i];
- tPos = x[i];
- z0 ^= t[tPos].n0;
- z1 ^= t[tPos].n1;
- }
- GcmUtilities.AsBytes(z0, z1, x);
- }
- }
- }
- #pragma warning restore
- #endif
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