一、生成 string 对应的 MD5 码

    /// <summary>
    /// 生成 string 对应的 MD5 码
    /// </summary>
    /// <param name="str">需要转换的字符串 string：用于登录认证时，str = username + 线下传递的key + DateTime.Now.Ticks.ToString() </param>
    /// <returns>转换后的 MD5 码</returns>
    public static string GetMD5FromString(string str)
    {
        byte[] data = System.Security.Cryptography.MD5.HashData(System.Text.Encoding.UTF8.GetBytes(str));
        System.Text.StringBuilder sBuilder = new();
        for (int i = 0; i < data.Length; i++)
        {
            sBuilder.Append(data[i].ToString("x2"));
        }

        return sBuilder.ToString().ToUpper();
    }

二、 生成 string 对应的 Pbkdf2 码

    /// <summary>
    /// derive a 256-bit subkey (use HMACSHA256 with 100 iterations)
    /// </summary>
    /// <param name="str">需要转换的字符串 string：用于登录认证时，通常为 username</param>
    /// <param name="password">线下传递的key</param>
    /// <param name="Ticks">用于登录认证时，通常为 DateTime.Now.Ticks.ToString()，用于检测登录认证是否超时</param>
    /// <returns>转换后的 Pbkdf2 码</returns>
    public static string GetPbkdf2FromString(string str, string password, string Ticks)
    {
        string hashed = Convert.ToBase64String(Microsoft.AspNetCore.Cryptography.KeyDerivation.KeyDerivation.Pbkdf2(
            password: password,
            salt: System.Text.Encoding.UTF8.GetBytes(str + Ticks),
            prf: Microsoft.AspNetCore.Cryptography.KeyDerivation.KeyDerivationPrf.HMACSHA256,
            iterationCount: 100,
            numBytesRequested: 256 / 8));

        return hashed;
    }