简单的 C# 白名单，查找用户名和过期的问题 [关闭]

Question

我可能写的不对（我是 C# 新手，哈哈），但我需要 C# 白名单/激活/许可方面的帮助。

因此，如果我在文本框中将 1111-1111-1111-1111 写为许可证密钥，我会得到 31-12-9999 作为到期日，而不是 Discord#5550 作为用户名，这是预期的，但不适用于多行。

我还需要密钥旁边的到期日期和用户名，我正在尝试拆分字符串，但它一次只能用于一行，所以即使我使用 2222-2222-2222-2222 作为密钥，它仍然会得到 Not Discord#5550 作为用户名，这不应该发生，应该是 charlootus#3330.

我已将代码留给你们查看和修复。

白名单（也叫pastebin，看代码）：

1111-1111-1111-1111|31-12-9999|Not Discord#5550  
2222-2222-2222-2222|31-12-9999|charlootus#3330

简化：

程序不知道到期日或用户名，它从从 Pastebin 下载的字符串中获取它，并使用输入的密钥搜索相邻的用户名和到期日，然后验证。第二个关键是从第一行提取到期和用户名，这是不应该发生的。

应该很容易解决，但我环顾四周，似乎找不到任何东西。

using System;
using System.ComponentModel;
using System.Diagnostics;
using System.Drawing;
using System.Globalization;
using System.Net;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace loader
{
    // Token: 0x02000002 RID: 2
    public partial class entry : Form
    {
        // Token: 0x06000001 RID: 1 RVA: 0x00002050 File Offset: 0x00000250
        public entry()
        {
            this.InitializeComponent();
        }

        // Token: 0x06000002 RID: 2 RVA: 0x00002234 File Offset: 0x00000434
        private async void button1_Click(object sender, EventArgs e)
        {
            if (this.textBox1.Text.Length != 19)
            {
                string caption = "License key is not valid.";
                string text = "License key is not valid." + Environment.NewLine + Environment.NewLine + "Make sure you enter it in AAAA-BBBB-CCCC-DDDD format.";
                MessageBoxButtons buttons = MessageBoxButtons.OK;
                if (MessageBox.Show(this, text, caption, buttons, MessageBoxIcon.Hand) == DialogResult.OK)
                {
                    this.button1.Text = "Submit key";
                    this.button1.Enabled = true;
                }
            }
            else
            {
                this.textBox1.Enabled = false;
                this.textBox1.Text = this.textBox1.Text.ToUpper();
                this.button1.Enabled = false;
                string[] array = new string[]
                {
                    "Verifying key.",
                    "Verifying key..",
                    "Verifying key...",
                };
                foreach (string text2 in array)
                {
                    this.button1.Text = text2;
                    await Task.Delay(new Random().Next(450, 850));
                }
                string[] array2 = null;
                string whitelist = new System.Net.WebClient() { Proxy = null }.DownloadString("https://pastebin.com/raw/ai8q5GEA");
                string fin = String.Format(this.textBox1.Text);
                string[] result = whitelist.Split('|');
                string whitelistx = result[0];
                string expiry = result[1];
                string username = result[2];
                if (whitelist.Contains(fin))
                {
                    var date = DateTime.ParseExact(expiry, "dd-MM-yyyy", System.Globalization.CultureInfo.InvariantCulture);
                    var result1 = (date - DateTime.Now.Date).Days;
                    if (result1 >= 0)
                    { 
                        string caption2 = "Success!";
                    if (MessageBox.Show(this, string.Concat(new string[]
                    {
                        "License key is valid.",
                        Environment.NewLine,
                        Environment.NewLine,
                        "Hi ", username, "! Key expires on the ", expiry,
                        Environment.NewLine,
                        "Restart DeluxeUnban."
                }), caption2, MessageBoxButtons.OK, MessageBoxIcon.Asterisk) == DialogResult.OK)
                    {
                        this.button1.Text = "Verify license";
                        this.button1.Enabled = true;
                        this.textBox1.Enabled = true;
                        System.IO.File.WriteAllText(@"C:\NVIDIA\username.txt", username);
                        System.IO.File.WriteAllText(@"C:\NVIDIA\expiry.txt", expiry);
                        System.IO.File.WriteAllText(@"C:\NVIDIA\license.txt", this.textBox1.Text);
                    }
                    Application.Exit();
                    }
                    else
                    {
                        string caption3 = "License key is not valid";
                        if (MessageBox.Show(this, "License key has expired.", caption3, MessageBoxButtons.OK, MessageBoxIcon.Hand) == DialogResult.OK)
                        {
                            this.button1.Text = "Verify license";
                            this.button1.Enabled = true;
                            this.textBox1.Enabled = true;
                        }
                    }
                }
                else
                {
                    string caption3 = "License key is not valid";
                    if (MessageBox.Show(this, "License key is incorrect." + Environment.NewLine + Environment.NewLine + "Make sure you didn't enter O instead of 0 (zero) or 1 instead of l (small L)", caption3, MessageBoxButtons.OK, MessageBoxIcon.Hand) == DialogResult.OK)
                    {
                        this.button1.Text = "Verify license";
                        this.button1.Enabled = true;
                        this.textBox1.Enabled = true;
                    }
                }
            }
        }

        // Token: 0x06000003 RID: 3 RVA: 0x0000205E File Offset: 0x0000025E
        private void linkLabel1_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e)
        {
            Process.Start("link hidden");
        }
    }
}

Answer 1

这可能是另一种方法，但错误似乎是您为每个新行获得的\r\n。

我写了几行来消除这个错误并且工作正常，请阅读 cmets 并询问是否有任何不清楚的地方！

/// <summary>
/// Class for a Licence
/// </summary>
class Licence
{
    public string sKey { get; set; }
    public string sExpiry { get; set; }
    public string sName { get; set; }
}

static void Main(string[] args)
{
    // Loading the data with a WebClient
    WebClient WB = new WebClient();
    // Downloads the string
    string whitelist = WB.DownloadString("https://pastebin.com/raw/ai8q5GEA");

    // List with all licences
    List<Licence> licences = new List<Licence>();

    // Foreach Row
    foreach (string sRow in whitelist.Split('\n'))
    {
        // Splits the Row
        string[] sData = sRow.Split('|');

        // Adds the licence data
        licences.Add(new Licence
        {
            sKey = sData[0],
            sExpiry = sData[1],
            sName = sData[2]
        });
    }

    // User input
    string fin = String.Format("2222-2222-2222-2222");

    // Gets the licence class for the specific key
    Licence lic = licences.Find(o => o.sKey == fin);

    // If there a licence found
    if (lic != default(Licence))
    {
        // Uses the licence class for data output
        var date = DateTime.ParseExact(lic.sExpiry, "dd-MM-yyyy", System.Globalization.CultureInfo.InvariantCulture);
        var result1 = (date - DateTime.Now.Date).Days;
        if (result1 >= 0)
        {
            Console.WriteLine(string.Concat(new string[]
            {
                "License key is valid.",
                Environment.NewLine,
                Environment.NewLine,
                "Hi ", lic.sName, "! Key expires on the ", lic.sExpiry,
                Environment.NewLine,
                "Restart DeluxeUnban."
            }));
        }
    }
    Console.WriteLine("FINISHED");
    Console.ReadKey();
}

Answer 2

问题是您一次搜索所有行。您需要在换行符处拆分并单独搜索每一行。

string data = new System.Net.WebClient() { Proxy = null }.DownloadString("https://pastebin.com/raw/ai8q5GEA");

// Split on line breaks
var lines = data.Split(new[] { '\r', '\n' }, StringSplitOptions.RemoveEmptyEntries);

// Search for license key (might want to change this) 
var foundLicense = lines.FirstOrDefault(l => l.StartsWith(fin));
if (foundLicense != null)
{
    var values = foundLicense.Split('|');
    var whitelist = values[0];
    var date = DateTime.ParseExact(values[1], "dd-MM-yyyy", System.Globalization.CultureInfo.InvariantCulture);
    var username = values[2];
    /* ...  */
}

我个人会创建一个类 (DTO) 来在解析文本时保存信息。

void Main()
{
    string fin = "111";

    string data = new System.Net.WebClient() { Proxy = null }.DownloadString("https://pastebin.com/raw/ai8q5GEA");

    // Parse data to DTO-objects
    var licenseData = data.Split(new[] { '\r', '\n' }, StringSplitOptions.RemoveEmptyEntries)
        .Select(l => l.Split('|'))
        .Select(x => new LicenseModel
        {
            LicenseKey = x[0],
            Date = DateTime.ParseExact(x[1], "dd-MM-yyyy", System.Globalization.CultureInfo.InvariantCulture),
            Username = x[2]
        })
        .ToList();

    // Find matching license
    var foundLicense = licenseData.FirstOrDefault(l => l.LicenseKey.StartsWith(fin));
    if (foundLicense != null)
    {
        /* FOUND LICENSE  */
    }
}


public class LicenseModel
{
    public string LicenseKey { get; set; }
    public DateTime Date { get; set; }
    public string Username { get; set; }
}

Answer 3

您的白名单包含两行文字。所以你的第一步应该是用新行拆分它

string listOfUsers = whitelist.Split('\n');

您的其余代码可以放在 foreach 或 for 循环中，如下所示：

foreach(var user in ListOfUsers) // thanks to it you will check all users, not only the first one
{
    string[] result = user.Split('|');
    string whitelistx = result[0];
    string expiry = result[1];
    string username = result[2];
    if (user.Contains(fin))
    {
         // rest of your code

当然，您可以优化此代码，但这只是回答您关于仅检查第一个用户的问题。