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using System;
using System.Security.Cryptography;
using System.Text;
namespace Timeline.Helpers
{
public static class SecureRandomExtensions
{
private static readonly char[] AlphaDigitString = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ".ToCharArray();
public static string GenerateAlphaDigitString(this RandomNumberGenerator randomNumberGenerator, int length)
{
if (length <= 0) throw new ArgumentOutOfRangeException(nameof(length));
var buffer = new byte[length];
randomNumberGenerator.GetBytes(buffer);
StringBuilder stringBuilder = new();
foreach (byte b in buffer)
{
stringBuilder.Append(AlphaDigitString[b % AlphaDigitString.Length]);
}
return stringBuilder.ToString();
}
}
}
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