public void Init(byte[] H) { if (T == null) { T = new ulong[512]; } else if (Arrays.AreEqual(this.H, H)) { return; } this.H = Arrays.Clone(H); // T[0] = 0 // T[1] = H.p^7 GcmUtilities.AsUlongs(this.H, T, 2); GcmUtilities.MultiplyP7(T, 2, T, 2); for (int n = 2; n < 256; n += 2) { // T[2.n] = T[n].p^-1 GcmUtilities.DivideP(T, n, T, n << 1); // T[2.n + 1] = T[2.n] + T[1] GcmUtilities.Xor(T, n << 1, T, 2, T, (n + 1) << 1); } }