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);
}
}
