如何可靠地破坏PrincipalContext.ValidateCredentials

Question

我有一个应用程序需要能够对本地计算机或域使用Windows身份验证。以前，我使用PrincipalContext.ValidateCredentials，它一开始工作正常，然后它开始随机返回false以获取正确的凭据。我查看了this question并看到人们说如果PrincipalContext.ValidateCredentials负载过重，那么它可能会开始抛出异常，我注意到其他地方的人都说它总是返回假。 / p>

我链接的问题建议使用LogonUser代替advapi32.dll库。这没关系，唯一的问题是我希望能够在说另一种方法起作用之前能够可靠地打破PrincipalContext.ValidateCredentials调用。此代码不会产生任何错误，并且永远不会在返回这些错误否定的同一系统上返回false。我想打破它，以便确保LogonUser电话不会出现同样的问题。

using System;
using System.Collections.Generic;
using System.DirectoryServices.AccountManagement;
using System.IO;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading;
using System.Threading.Tasks;

namespace TestAuthentication
{
    class Program
    {
        static void Main(string[] args)
        {
            var credentials = new Dictionary<string, string>
            {
                {"Developer","rfsdev"},
                {"Customer","password"},
                {"Content Builder", "password"},
            };
            bool isBroken = false;
            int maxTries = 10000;
            int currentTry = 0;
            while(!isBroken && currentTry < maxTries)
            {
                currentTry++;
                foreach(var kvp in credentials)
                {
                    isBroken = !AreCredentialsValid(kvp.Key, kvp.Value);
                    Console.WriteLine("Result from {0} and {1}: {2}", kvp.Key, kvp.Value, !isBroken);
                    if (isBroken)
                    {
                        Console.WriteLine("Found breaking case after {0} tries", currentTry);
                        break;
                    }
                }
            }
            Console.ReadLine();
        }

        protected static bool AreCredentialsValid(string username, string password)
        {
            bool isDomain = username.Contains("\\");
            string domain = isDomain ? username.Split(new char[] { '\\' })[0] : "";
            username = isDomain ? username.Split(new char[] { '\\' })[1] : username;
            bool credentialsValid = false;
            if (isDomain)
                using (PrincipalContext pc = new PrincipalContext(ContextType.Domain, domain))
                    credentialsValid = pc.ValidateCredentials(username, password);
            else
                using (PrincipalContext pc = new PrincipalContext(ContextType.Machine))
                    credentialsValid = pc.ValidateCredentials(username, password);
            return credentialsValid;
        }
    }
}