43 lines
1.3 KiB
C#
43 lines
1.3 KiB
C#
using System;
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using System.Security.Cryptography;
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using System.Text;
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namespace SharpChat {
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public static class RNG {
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private static object Lock { get; } = new();
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private static Random NormalRandom { get; } = new();
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private static RandomNumberGenerator SecureRandom { get; } = RandomNumberGenerator.Create();
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public static int Next() {
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lock (Lock)
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return NormalRandom.Next();
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}
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public static int Next(int max) {
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lock (Lock)
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return NormalRandom.Next(max);
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}
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public static int Next(int min, int max) {
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lock (Lock)
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return NormalRandom.Next(min, max);
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}
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public static void NextBytes(byte[] buffer) {
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lock(Lock)
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SecureRandom.GetBytes(buffer);
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}
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public const string ID_CHARS = @"abcdefghijklmnopqrstuvwxyz0123456789-_ABCDEFGHIJKLMNOPQRSTUVWXYZ";
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public static string NextString(int length, string chars = ID_CHARS) {
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byte[] buffer = new byte[length];
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NextBytes(buffer);
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StringBuilder sb = new();
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foreach(byte b in buffer)
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sb.Append(chars[b % chars.Length]);
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return sb.ToString();
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}
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}
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}
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