Nat320
using Org.BouncyCastle.Crypto.Utilities;
namespace Org.BouncyCastle.Math.Raw
{
internal static class Nat320
{
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];
}
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];
}
public static ulong[] Create64()
{
return new ulong[5];
}
public static ulong[] CreateExt64()
{
return new ulong[10];
}
public static bool Eq64(ulong[] x, ulong[] y)
{
for (int num = 4; 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 < 5; i++) {
if (x[i] != 0)
return false;
}
return true;
}
public static bool IsZero64(ulong[] x)
{
for (int i = 0; i < 5; i++) {
if (x[i] != 0)
return false;
}
return true;
}
public static BigInteger ToBigInteger64(ulong[] x)
{
byte[] array = new byte[40];
for (int i = 0; i < 5; i++) {
ulong num = x[i];
if (num != 0)
Pack.UInt64_To_BE(num, array, 4 - i << 3);
}
return new BigInteger(1, array);
}
}
}