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Adds Xoshiro256** RNG (#67)

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Kamron Batman 2020-01-09 00:42:09 -08:00 • committed by GitHub
parent 5e2be2d7b6
commit 853c8d21f7
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21 changed files with 471 additions and 371 deletions
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Projects/Server/Utilities/Random.cs Normal file
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/*************************************************************************
* ModernUO *
* Copyright (C) 2019 - ModernUO Development Team *
* Email: hi@modernuo.com *
* File: Random.cs - Created: 2019/12/30 - Updated: 2019/01/05 *
* *
* This program is free software: you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation, either version 3 of the License, or *
* (at your option) any later version. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program. If not, see <http://www.gnu.org/licenses/>. *
*************************************************************************/
using System;
using System.Security.Cryptography;
namespace Server
{
/// <summary>
/// Handles random number generation.
/// </summary>
public static class RandomImpl
{
private static readonly Xoshiro256PlusPlus _Random = new Xoshiro256PlusPlus();
public static uint Next(uint c) => _Random.Next(c);
public static bool NextBool() => _Random.NextBool();
public static void GetBytes(Span<byte> b) => _Random.GetBytes(b);
public static double NextDouble() => _Random.NextDouble();
}
public static class SecureRandomImpl
{
public static readonly RandomNumberGenerator _Random;
static SecureRandomImpl()
{
try
{
_Random = new DRng64();
if (_Random is IHardwareRNG rng && rng?.IsSupported() != true)
_Random = new RNGCryptoServiceProvider();
}
catch (Exception)
{
_Random = new RNGCryptoServiceProvider();
}
}
public static bool IsHardwareRNG => _Random is IHardwareRNG;
public static string Name => _Random.GetType().Name;
public static void GetBytes(Span<byte> buffer) => _Random.GetBytes(buffer);
}
public interface IHardwareRNG
{
bool IsSupported();
}
}