public void Init(byte[] H)
{
if (T == null)
{
T = new ulong[32][];
}
else if (Arrays.AreEqual(this.H, H))
{
return;
}
this.H = Arrays.Clone(H);
for (int i = 0; i < 32; ++i)
{
ulong[] t = T[i] = new ulong[32];
// t[0] = 0
if (i == 0)
{
// t[1] = H.p^3
GcmUtilities.AsUlongs(this.H, t, 2);
GcmUtilities.MultiplyP3(t, 2, t, 2);
}
else
{
// t[1] = T[i-1][1].p^4
GcmUtilities.MultiplyP4(T[i - 1], 2, t, 2);
}
for (int n = 2; n < 16; 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);
}
}
}
