Google身份验证器代码不匹配

Question

我正在使用Google身份验证器进行两步验证。它在本地工作正常。生产代码不匹配。因为我的服务器和我的移动时区不匹配。如何将我的服务器时区同步到我的移动应用程序。我正在使用基于时间的代码。

调用函数IsValid（密码，密码）

我的代码

public static class TimeBasedOneTimePassword
{
    public static readonly DateTime UNIX_EPOCH = new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc);

    private static MemoryCache _cache;

    static TimeBasedOneTimePassword()
    {
        _cache = new MemoryCache("TimeBasedOneTimePassword");
    }

    public static string GetPassword(string secret)
    {
        return GetPassword(secret, GetCurrentCounter());
    }

    public static string GetPassword(string secret, DateTime epoch, int timeStep)
    {
        long counter = GetCurrentCounter(DateTime.UtcNow, epoch, timeStep);

        return GetPassword(secret, counter);
    }

    public static string GetPassword(string secret, DateTime now, DateTime epoch, int timeStep, int digits)
    {
        long counter = GetCurrentCounter(now, epoch, timeStep);

        return GetPassword(secret, counter, digits);
    }

    private static string GetPassword(string secret, long counter, int digits = 6)
    {
        return HashedOneTimePassword.GeneratePassword(secret, counter, digits);
    }

    private static long GetCurrentCounter()
    {
        return GetCurrentCounter(DateTime.UtcNow, UNIX_EPOCH, 30);
    }

    private static long GetCurrentCounter(DateTime now, DateTime epoch, int timeStep)
    {
        return (long)(now - epoch).TotalSeconds / timeStep;
    }

    public static bool IsValid(string secret, string password, int checkAdjacentIntervals = 1)
    {
        string cache_key = string.Format("{0}_{1}", secret, password);

        if (_cache.Contains(cache_key))
        {
            throw new OneTimePasswordException("You cannot use the same secret/iterationNumber combination more than once.");
        }

        _cache.Add(cache_key, cache_key, new CacheItemPolicy { SlidingExpiration = TimeSpan.FromMinutes(2) });

        string strpass = GetPassword(secret);
        if (password ==strpass )
            return true;

        for (int i = 1; i <= checkAdjacentIntervals; i++)
        {
            if (password == GetPassword(secret, GetCurrentCounter() + i))
                return true;

            if (password == GetPassword(secret, GetCurrentCounter() - i))
                return true;
        }

        return false;
    }
}

谢谢，

SOMU