The next generation of the Teknik Services. Written in ASP.NET. https://www.teknik.io/
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using CommandLine;
using Microsoft.EntityFrameworkCore;
using nClam;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using Teknik.Areas.Paste.Models;
using Teknik.Areas.Stats.Models;
using Teknik.Areas.Upload.Models;
using Teknik.Areas.Users.Models;
using Teknik.Areas.Users.Utility;
using Teknik.Configuration;
using Teknik.Data;
using Teknik.Utilities;
using Teknik.Utilities.Cryptography;
namespace Teknik.ServiceWorker
{
public class Program
{
private static string currentPath = Path.GetDirectoryName(Assembly.GetEntryAssembly().Location);
private static string virusFile = Path.Combine(currentPath, "virusLogs.txt");
private static string errorFile = Path.Combine(currentPath, "errorLogs.txt");
private static string orphansFile = Path.Combine(currentPath, "orphanedFiles.txt");
private static string configPath = currentPath;
private const string TAKEDOWN_REPORTER = "Teknik Automated System";
private static readonly object dbLock = new object();
private static readonly object scanStatsLock = new object();
public static event Action<string> OutputEvent;
public static int Main(string[] args)
{
try
{
Parser.Default.ParseArguments<ArgumentOptions>(args).WithParsed(options =>
{
if (!string.IsNullOrEmpty(options.Config))
configPath = options.Config;
if (Directory.Exists(configPath))
{
Config config = Config.Load(configPath);
Output(string.Format("[{0}] Started Server Maintenance Process.", DateTime.Now));
var optionsBuilder = new DbContextOptionsBuilder<TeknikEntities>();
optionsBuilder.UseSqlServer(config.DbConnection);
using (TeknikEntities db = new TeknikEntities(optionsBuilder.Options))
{
// Scan all the uploads for viruses, and remove the bad ones
if (options.ScanUploads && config.UploadConfig.VirusScanEnable)
{
ScanUploads(config, db);
}
// Runs the migration
if (options.Migrate)
{
// Run the overall migration calls
TeknikMigration.RunMigration(db, config);
}
if (options.Expire)
{
ProcessExpirations(config, db);
}
if (options.Clean)
{
CleanStorage(config, db);
}
}
Output(string.Format("[{0}] Finished Server Maintenance Process.", DateTime.Now));
}
else
{
string msg = string.Format("[{0}] Config File does not exist.", DateTime.Now);
File.AppendAllLines(errorFile, new List<string> { msg });
Output(msg);
}
});
}
catch (Exception ex)
{
string msg = string.Format("[{0}] Exception: {1}", DateTime.Now, ex.GetFullMessage(true));
File.AppendAllLines(errorFile, new List<string> { msg });
Output(msg);
}
return -1;
}
public static void ScanUploads(Config config, TeknikEntities db)
{
Output(string.Format("[{0}] Started Virus Scan.", DateTime.Now));
List<Upload> uploads = db.Uploads.ToList();
int maxConcurrency = 100;
int totalCount = uploads.Count();
int totalScans = 0;
int currentScan = 0;
int totalViruses = 0;
using (SemaphoreSlim concurrencySemaphore = new SemaphoreSlim(maxConcurrency))
{
List<Task> runningTasks = new List<Task>();
foreach (Upload upload in uploads)
{
concurrencySemaphore.Wait();
currentScan++;
Task scanTask = Task.Factory.StartNew(async () =>
{
try
{
var virusDetected = await ScanUpload(config, db, upload, totalCount, currentScan);
if (virusDetected)
totalViruses++;
totalScans++;
}
catch (Exception ex)
{
string errorMsg = string.Format("[{0}] Scan Error: {1}", DateTime.Now, ex.GetFullMessage(true, true));
File.AppendAllLines(errorFile, new List<string> { errorMsg });
}
finally
{
concurrencySemaphore.Release();
}
});
if (scanTask != null)
{
runningTasks.Add(scanTask);
}
}
Task.WaitAll(runningTasks.ToArray());
}
bool running = true;
//while (running)
//{
// running = runningTasks.Exists(s => s != null && !s.IsCompleted && !s.IsCanceled && !s.IsFaulted);
//}
Output(string.Format("Scanning Complete. {0} Scanned | {1} Viruses Found | {2} Total Files", totalScans, totalViruses, totalCount));
}
private static async Task<bool> ScanUpload(Config config, TeknikEntities db, Upload upload, int totalCount, int currentCount)
{
bool virusDetected = false;
string subDir = upload.FileName[0].ToString();
string filePath = Path.Combine(config.UploadConfig.UploadDirectory, subDir, upload.FileName);
if (File.Exists(filePath))
{
// If the IV is set, and Key is set, then scan it
if (!string.IsNullOrEmpty(upload.Key) && !string.IsNullOrEmpty(upload.IV))
{
byte[] keyBytes = Encoding.UTF8.GetBytes(upload.Key);
byte[] ivBytes = Encoding.UTF8.GetBytes(upload.IV);
long maxUploadSize = config.UploadConfig.MaxUploadSize;
if (upload.User != null)
{
maxUploadSize = config.UploadConfig.MaxUploadSizeBasic;
IdentityUserInfo userInfo = await IdentityHelper.GetIdentityUserInfo(config, upload.User.Username);
if (userInfo.AccountType == AccountType.Premium)
{
maxUploadSize = config.UploadConfig.MaxUploadSizePremium;
}
}
using (FileStream fs = new FileStream(filePath, FileMode.Open, FileAccess.Read))
using (AesCounterStream aesStream = new AesCounterStream(fs, false, keyBytes, ivBytes))
{
ClamClient clam = new ClamClient(config.UploadConfig.ClamServer, config.UploadConfig.ClamPort);
clam.MaxStreamSize = maxUploadSize;
ClamScanResult scanResult = await clam.SendAndScanFileAsync(fs);
switch (scanResult.Result)
{
case ClamScanResults.Clean:
string cleanMsg = string.Format("[{0}] Clean Scan: {1}/{2} Scanned | {3} - {4}", DateTime.Now, currentCount, totalCount, upload.Url, upload.FileName);
Output(cleanMsg);
break;
case ClamScanResults.VirusDetected:
string msg = string.Format("[{0}] Virus Detected: {1} - {2} - {3}", DateTime.Now, upload.Url, upload.FileName, scanResult.InfectedFiles.First().VirusName);
Output(msg);
lock (scanStatsLock)
{
virusDetected = true;
File.AppendAllLines(virusFile, new List<string> { msg });
}
lock (dbLock)
{
string urlName = upload.Url;
// Delete from the DB
db.Uploads.Remove(upload);
// Delete the File
if (File.Exists(filePath))
{
File.Delete(filePath);
}
// Add to transparency report if any were found
Takedown report = new Takedown();
report.Requester = TAKEDOWN_REPORTER;
report.RequesterContact = config.SupportEmail;
report.DateRequested = DateTime.Now;
report.Reason = "Malware Found";
report.ActionTaken = string.Format("Upload removed: {0}", urlName);
report.DateActionTaken = DateTime.Now;
db.Takedowns.Add(report);
// Save Changes
db.SaveChanges();
}
break;
case ClamScanResults.Error:
string errorMsg = string.Format("[{0}] Scan Error: {1}", DateTime.Now, scanResult.RawResult);
File.AppendAllLines(errorFile, new List<string> { errorMsg });
Output(errorMsg);
break;
case ClamScanResults.Unknown:
string unkMsg = string.Format("[{0}] Unknown Scan Result: {1}", DateTime.Now, scanResult.RawResult);
File.AppendAllLines(errorFile, new List<string> { unkMsg });
Output(unkMsg);
break;
}
}
}
}
return virusDetected;
}
public static void ProcessExpirations(Config config, TeknikEntities db)
{
Output(string.Format("[{0}] Starting processing expirations.", DateTime.Now));
var curDate = DateTime.Now;
// Process uploads
List<Upload> uploads = db.Uploads.Where(u => u.ExpireDate != null && u.ExpireDate < curDate).ToList();
foreach (Upload upload in uploads)
{
string subDir = upload.FileName[0].ToString();
string filePath = Path.Combine(config.UploadConfig.UploadDirectory, subDir, upload.FileName);
// Delete the File
if (File.Exists(filePath))
{
File.Delete(filePath);
}
}
db.RemoveRange(uploads);
db.SaveChanges();
// Process Pastes
List<Paste> pastes = db.Pastes.Where(p => p.ExpireDate != null && p.ExpireDate < curDate).ToList();
foreach (Paste paste in pastes)
{
string subDir = paste.FileName[0].ToString();
string filePath = Path.Combine(config.PasteConfig.PasteDirectory, subDir, paste.FileName);
// Delete the File
if (File.Exists(filePath))
{
File.Delete(filePath);
}
}
db.RemoveRange(pastes);
db.SaveChanges();
}
public static void CleanStorage(Config config, TeknikEntities db)
{
var curDate = DateTime.Now;
// Process upload data
Output(string.Format("[{0}] Starting processing upload storage cleaning.", DateTime.Now));
List<string> uploads = db.Uploads.Select(u => Path.Combine(config.UploadConfig.UploadDirectory, u.FileName[0].ToString(), u.FileName)).Select(u => u.ToLower()).ToList();
List<string> files = Directory.GetFiles(config.UploadConfig.UploadDirectory, "*.*", SearchOption.AllDirectories).Select(f => f.ToLower()).ToList();
var orphans = files.Except(uploads);
File.AppendAllLines(orphansFile, orphans);
foreach (var orphan in orphans)
{
File.Delete(orphan);
}
}
public static void Output(string message)
{
Console.WriteLine(message);
if (OutputEvent != null)
{
OutputEvent(message);
}
}
}
}