RNGCryptoServiceProvider 已过时

RNGCryptoServiceProvider is obsolete

我需要使用随机数字和字母生成令牌。但是,错误消息告诉我使用 RandomNumberGenerator,它只会给我随机数,这无济于事。

错误信息

'RNGCryptoServiceProvider' is obsolete: 'RNGCryptoServiceProvider is obsolete. To generate a random number, use one of the RandomNumberGenerator static methods instead.'

当前使用的代码

    private static string RandomString()
    {
        int length = 256;
        const string valid = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890";
        StringBuilder res = new StringBuilder();
        using (RNGCryptoServiceProvider rng = new RNGCryptoServiceProvider())
        {
            byte[] uintBuffer = new byte[sizeof(uint)];

            while (length-- > 0)
            {
                rng.GetBytes(uintBuffer);
                uint num = BitConverter.ToUInt32(uintBuffer, 0);
                res.Append(valid[(int)(num % (uint)valid.Length)]);
            }
        }
        return res.ToString();
    }

如何更改上面的代码以使用未过时的包?

您可以这样使用 RandomNumberGenerator

var randomNumber = new byte[32];
string refreshToken = "";

using (var rng = RandomNumberGenerator.Create())
{
     rng.GetBytes(randomNumber);
     refreshToken = Convert.ToBase64String(randomNumber);
}

结果示例:fHu4SOyv03PhHvqWx5WGmI5xQFnH00CmLCV3IYJd5Dw=

只需根据您的情况进行调整即可。