private static void secp256k1_ecmult_odd_multiples_table(int n, GeJ[] prej, Fe[] zr, GeJ a)
{
var r1 = new GeJ();
Group.secp256k1_gej_double_var(r1, a, (Fe)null);
var b = new Ge();
b.X = r1.X.Clone();
b.Y = r1.Y.Clone();
b.Infinity = false;
var r2 = new Ge();
Group.secp256k1_ge_set_gej_zinv(r2, a, r1.Z);
prej[0].X = r2.X.Clone();
prej[0].Y = r2.Y.Clone();
prej[0].Z = a.Z.Clone();
prej[0].Infinity = false;
zr[0] = r1.Z.Clone();
for (var index = 1; index < n; ++index)
{
Group.secp256k1_gej_add_ge_var(prej[index], prej[index - 1], b, zr[index]);
}
Field.Mul(prej[n - 1].Z, prej[n - 1].Z, r1.Z);
}
public static void ContextBuild(EcmultGenContext ctx, EventHandler <Callback> cb)
{
var r1 = new Ge[1024];
var r2 = new GeJ();
var geJ1 = new GeJ();
if (ctx.Prec != null)
{
return;
}
ctx.PrecInit();
Group.secp256k1_gej_set_ge(r2, Group.Secp256K1GeConstG);
var bytes = Encoding.UTF8.GetBytes("The scalar for this x is unknown");
var fe = new Fe();
var ge = new Ge();
Field.SetB32(fe, bytes);
Group.secp256k1_ge_set_xo_var(ge, fe, false);
Group.secp256k1_gej_set_ge(geJ1, ge);
Group.secp256k1_gej_add_ge_var(geJ1, geJ1, Group.Secp256K1GeConstG, (Fe)null);
var a = new GeJ[1024];
for (var index = 0; index < a.Length; ++index)
{
a[index] = new GeJ();
}
var geJ2 = r2.Clone();
var geJ3 = geJ1.Clone();
for (var index1 = 0; index1 < 64; ++index1)
{
a[index1 * 16] = geJ3.Clone();
for (var index2 = 1; index2 < 16; ++index2)
{
Group.secp256k1_gej_add_var(a[index1 * 16 + index2], a[index1 * 16 + index2 - 1], geJ2, (Fe)null);
}
for (var index2 = 0; index2 < 4; ++index2)
{
Group.secp256k1_gej_double_var(geJ2, geJ2, (Fe)null);
}
Group.secp256k1_gej_double_var(geJ3, geJ3, (Fe)null);
if (index1 == 62)
{
Group.secp256k1_gej_neg(geJ3, geJ3);
Group.secp256k1_gej_add_var(geJ3, geJ3, geJ1, (Fe)null);
}
}
for (var index = 0; index < r1.Length; ++index)
{
r1[index] = new Ge();
}
Group.secp256k1_ge_set_all_gej_var(r1, a, 1024, cb);
for (var index1 = 0; index1 < 64; ++index1)
{
for (var index2 = 0; index2 < 16; ++index2)
{
Group.ToStorage(ctx.Prec[index1][index2], r1[index1 * 16 + index2]);
}
}
EcMultGen.Blind(ctx, (byte[])null);
}