initial commit

decompiled/PureCrack/Preflight.cs

@@ -0,0 +1,166 @@
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.IO;
+using System.Net;
+using System.Net.Sockets;
+using System.Security.Principal;
+using Microsoft.CodeAnalysis.CSharp;
+using PureCrack.Panel;
+using PureCrack.Setup;
+using PureCrack.Util;
+
+namespace PureCrack;
+
+public static class Preflight
+{
+	public sealed class Result
+	{
+		public List<string> Problems { get; } = new List<string>();
+
+		public string? PanelExePath { get; set; }
+
+		public bool Ok => Problems.Count == 0;
+	}
+
+	public static Result Run()
+	{
+		Result result = new Result();
+		if (!IsAdmin())
+		{
+			result.Problems.Add("not running as administrator (need admin to bind :443 + write hosts + install root cert)");
+		}
+		if (!IsTcpPortFree(443))
+		{
+			string text = LookupTcpListenerHolder(443);
+			string arg = text ?? "another process";
+			string arg2 = ((text != null && text.StartsWith("PID ")) ? (" (taskkill /F /PID " + text.Substring(4).Split(new char[1] { ' ' })[0] + " to stop it)") : "");
+			result.Problems.Add($":{443} is already bound by {arg}{arg2}");
+		}
+		try
+		{
+			if (!HostsManager.IsWritable())
+			{
+				result.Problems.Add(HostsManager.Path + " is not writable (file marked read-only? AV blocking?)");
+			}
+		}
+		catch (Exception ex)
+		{
+			result.Problems.Add("hosts file check threw: " + ex.Message);
+		}
+		try
+		{
+			result.PanelExePath = PanelLauncher.FindExe();
+		}
+		catch (FileNotFoundException ex2)
+		{
+			result.Problems.Add(ex2.Message);
+		}
+		try
+		{
+			_ = typeof(CSharpCompilation).Assembly.FullName;
+		}
+		catch (Exception ex3)
+		{
+			result.Problems.Add("Roslyn (Microsoft.CodeAnalysis.CSharp) not loadable: " + ex3.Message);
+		}
+		return result;
+	}
+
+	public static void Report(Result r)
+	{
+		if (r.Ok)
+		{
+			Log.Ok("preflight passed (panel at " + r.PanelExePath + ")");
+			return;
+		}
+		Log.Err($"preflight: {r.Problems.Count} problem(s) — fix all then re-launch:");
+		foreach (string problem in r.Problems)
+		{
+			Log.Bullet("  - " + problem);
+		}
+	}
+
+	private static bool IsAdmin()
+	{
+		try
+		{
+			using WindowsIdentity ntIdentity = WindowsIdentity.GetCurrent();
+			return new WindowsPrincipal(ntIdentity).IsInRole(WindowsBuiltInRole.Administrator);
+		}
+		catch
+		{
+			return false;
+		}
+	}
+
+	private static bool IsTcpPortFree(int port)
+	{
+		TcpListener tcpListener = null;
+		try
+		{
+			tcpListener = new TcpListener(IPAddress.Any, port);
+			tcpListener.Start();
+			return true;
+		}
+		catch (SocketException)
+		{
+			return false;
+		}
+		finally
+		{
+			try
+			{
+				tcpListener?.Stop();
+			}
+			catch
+			{
+			}
+		}
+	}
+
+	private static string? LookupTcpListenerHolder(int port)
+	{
+		try
+		{
+			using Process process = Process.Start(new ProcessStartInfo("netstat", "-ano")
+			{
+				UseShellExecute = false,
+				RedirectStandardOutput = true,
+				CreateNoWindow = true
+			});
+			if (process == null)
+			{
+				return null;
+			}
+			string text = process.StandardOutput.ReadToEnd();
+			process.WaitForExit(5000);
+			string[] array = text.Split(new char[1] { '\n' });
+			for (int i = 0; i < array.Length; i++)
+			{
+				string text2 = array[i].Trim();
+				if (!text2.StartsWith("TCP", StringComparison.Ordinal))
+				{
+					continue;
+				}
+				string[] array2 = text2.Split(new char[2] { ' ', '\t' }, StringSplitOptions.RemoveEmptyEntries);
+				if (array2.Length >= 5 && !(array2[3] != "LISTENING") && array2[1].EndsWith(":" + port, StringComparison.Ordinal) && int.TryParse(array2[4], out var result))
+				{
+					try
+					{
+						Process processById = Process.GetProcessById(result);
+						return $"PID {result} ({processById.ProcessName})";
+					}
+					catch
+					{
+						return $"PID {result}";
+					}
+				}
+			}
+		}
+		catch
+		{
+		}
+		return null;
+	}
+}