Nat448
using Org.BouncyCastle.Crypto.Utilities;
using System;
namespace Org.BouncyCastle.Math.Raw
{
internal static class Nat448
{
public static void Copy64(ulong[] x, ulong[] z)
{
z[0] = x[0];
z[1] = x[1];
z[2] = x[2];
z[3] = x[3];
z[4] = x[4];
z[5] = x[5];
z[6] = x[6];
}
public static void Copy64(ulong[] x, int xOff, ulong[] z, int zOff)
{
z[zOff] = x[xOff];
z[zOff + 1] = x[xOff + 1];
z[zOff + 2] = x[xOff + 2];
z[zOff + 3] = x[xOff + 3];
z[zOff + 4] = x[xOff + 4];
z[zOff + 5] = x[xOff + 5];
z[zOff + 6] = x[xOff + 6];
}
public static void Copy64(ReadOnlySpan<ulong> x, Span<ulong> z)
{
z[0] = x[0];
z[1] = x[1];
z[2] = x[2];
z[3] = x[3];
z[4] = x[4];
z[5] = x[5];
z[6] = x[6];
}
public static ulong[] Create64()
{
return new ulong[7];
}
public static ulong[] CreateExt64()
{
return new ulong[14];
}
public static bool Eq64(ulong[] x, ulong[] y)
{
for (int num = 6; num >= 0; num--) {
if (x[num] != y[num])
return false;
}
return true;
}
public static bool IsOne64(ulong[] x)
{
if (x[0] != 1)
return false;
for (int i = 1; i < 7; i++) {
if (x[i] != 0)
return false;
}
return true;
}
public static bool IsZero64(ReadOnlySpan<ulong> x)
{
for (int i = 0; i < 7; i++) {
if (x[i] != 0)
return false;
}
return true;
}
public static void Mul(uint[] x, uint[] y, uint[] zz)
{
Nat224.Mul(x, y, zz);
Nat224.Mul(x, 7, y, 7, zz, 14);
uint num = Nat224.AddToEachOther(zz, 7, zz, 14);
uint cIn = num + Nat224.AddTo(zz, 0, zz, 7, 0);
num += Nat224.AddTo(zz, 21, zz, 14, cIn);
uint[] array = Nat224.Create();
uint[] array2 = Nat224.Create();
bool flag = Nat224.Diff(x, 7, x, 0, array, 0) != Nat224.Diff(y, 7, y, 0, array2, 0);
uint[] array3 = Nat224.CreateExt();
Nat224.Mul(array, array2, array3);
num = (uint)((int)num + (flag ? ((int)Nat.AddTo(14, array3, 0, zz, 7)) : Nat.SubFrom(14, array3, 0, zz, 7)));
Nat.AddWordAt(28, num, zz, 21);
}
public unsafe static void Mul(ReadOnlySpan<uint> x, ReadOnlySpan<uint> y, Span<uint> zz)
{
Nat224.Mul(x, y, zz);
Nat224.Mul(x.Slice(7, x.Length - 7), y.Slice(7, y.Length - 7), zz.Slice(14, zz.Length - 14));
uint num = Nat224.AddToEachOther(zz.Slice(7, zz.Length - 7), zz.Slice(14, zz.Length - 14));
uint cIn = num + Nat224.AddTo(zz, zz.Slice(7, zz.Length - 7), 0);
num += Nat224.AddTo(zz.Slice(21, zz.Length - 21), zz.Slice(14, zz.Length - 14), cIn);
Span<uint> span = new Span<uint>(stackalloc byte[28], 7);
Span<uint> span2 = new Span<uint>(stackalloc byte[28], 7);
bool flag = Nat224.Diff(x.Slice(7, x.Length - 7), x, span) != Nat224.Diff(y.Slice(7, y.Length - 7), y, span2);
Span<uint> span3 = new Span<uint>(stackalloc byte[56], 14);
Nat224.Mul(span, span2, span3);
num = (uint)((int)num + (flag ? ((int)Nat.AddTo(14, span3, zz.Slice(7, zz.Length - 7))) : Nat.SubFrom(14, span3, zz.Slice(7, zz.Length - 7))));
Nat.AddWordAt(28, num, zz, 21);
}
public static void Square(uint[] x, uint[] zz)
{
Nat224.Square(x, zz);
Nat224.Square(x, 7, zz, 14);
uint num = Nat224.AddToEachOther(zz, 7, zz, 14);
uint cIn = num + Nat224.AddTo(zz, 0, zz, 7, 0);
num += Nat224.AddTo(zz, 21, zz, 14, cIn);
uint[] array = Nat224.Create();
Nat224.Diff(x, 7, x, 0, array, 0);
uint[] array2 = Nat224.CreateExt();
Nat224.Square(array, array2);
num = (uint)((int)num + Nat.SubFrom(14, array2, 0, zz, 7));
Nat.AddWordAt(28, num, zz, 21);
}
public unsafe static void Square(ReadOnlySpan<uint> x, Span<uint> zz)
{
Nat224.Square(x, zz);
Nat224.Square(x.Slice(7, x.Length - 7), zz.Slice(14, zz.Length - 14));
uint num = Nat224.AddToEachOther(zz.Slice(7, zz.Length - 7), zz.Slice(14, zz.Length - 14));
uint cIn = num + Nat224.AddTo(zz, zz.Slice(7, zz.Length - 7), 0);
num += Nat224.AddTo(zz.Slice(21, zz.Length - 21), zz.Slice(14, zz.Length - 14), cIn);
Span<uint> span = new Span<uint>(stackalloc byte[28], 7);
Nat224.Diff(x.Slice(7, x.Length - 7), x, span);
Span<uint> span2 = new Span<uint>(stackalloc byte[56], 14);
Nat224.Square(span, span2);
num = (uint)((int)num + Nat.SubFrom(14, span2, zz.Slice(7, zz.Length - 7)));
Nat.AddWordAt(28, num, zz, 21);
}
public static BigInteger ToBigInteger64(ulong[] x)
{
byte[] array = new byte[56];
for (int i = 0; i < 7; i++) {
ulong num = x[i];
if (num != 0)
Pack.UInt64_To_BE(num, array, 6 - i << 3);
}
return new BigInteger(1, array);
}
}
}