finished extraction logic

src/apphost-extract/apphost-extract/AppHostFile.cs

@@ -12,23 +12,28 @@ namespace apphost_extract
         private FileStream FileStream;
 
         public AppHostFileHeader Header { get; set; }
+        private const int HEADER_OFFSET_PTR = 0x27600;
 
 
         public AppHostFile(FileStream fileStream) 
         {
             FileStream = fileStream;
-            Header = new AppHostFileHeader(FileStream);
+            
+            var buffer = new byte[sizeof(int)];
+            FileStream.Seek(HEADER_OFFSET_PTR, SeekOrigin.Begin);
+            FileStream.Read(buffer, 0, buffer.Length);
+
+            Header = new AppHostFileHeader(FileStream, BitConverter.ToInt32(buffer, 0));
         }
 
 
         public static AppHostFile Open(string path)
         {
-            if (!File.Exists(path)) Log.Fatal("File not found.");
-
             try
             {
                 FileStream fs = new FileStream(path, FileMode.Open, FileAccess.ReadWrite);
                 AppHostFile file = new AppHostFile(fs);
+                Log.Info("File opened successfully!");
                 return file;
             }
             catch(Exception ex)
@@ -37,5 +42,33 @@ namespace apphost_extract
                 return null;
             }
         }
+
+        public void ExtractAll(string outputDir)
+        {
+            Directory.CreateDirectory(outputDir);
+            foreach (var fileEntry in Header.Manifest.FileEntries)
+            {
+                try
+                {
+                    var bytes = fileEntry.Read();
+                    var name = fileEntry.Name;
+                    var filePath = Path.Combine(outputDir, name);
+                    File.WriteAllBytes(filePath, bytes);
+
+                    Log.Critical($"Extracted {name}");
+
+                }
+                catch (Exception ex)
+                {
+                    Log.Error($"Could not extract {fileEntry.Name}: {ex.Message}");
+                }
+
+            }
+        }
+
+        public void Close()
+        {
+            FileStream.Close();
+        }
     }
 }

src/apphost-extract/apphost-extract/AppHostFileEntry.cs

@@ -9,23 +9,39 @@ namespace apphost_extract
 {
     public class AppHostFileEntry
     {
-        public int Offset { get; set; }
+        public long Offset { get; set; }
         public int Size { get; set; }
-        public string RelativePath { get; set; }
+        public string Name { get; set; }
 
         private byte[] Raw;
+        private FileStream FileStream;
 
         private const int FILE_ENTRY_SIZE = 0x12;
 
         public AppHostFileEntry(FileStream File)
         {
+            FileStream = File;
             byte[] entryBuffer = new byte[FILE_ENTRY_SIZE];
             File.Read(entryBuffer, 0, entryBuffer.Length);
             Raw = entryBuffer;
 
+            Offset = BitConverter.ToInt64(Raw, 0);
+
+            //hopefully nobody embeds a file larger than 2GB :D
+            Size = (int)BitConverter.ToInt64(Raw, 0x8); 
+
             byte[] stringBuffer = new byte[Raw[0x11]];
             File.Read(stringBuffer, 0, stringBuffer.Length);
-            RelativePath = Encoding.UTF8.GetString(stringBuffer);
+            Name = Encoding.UTF8.GetString(stringBuffer);
+        }
+
+        public byte[] Read()
+        {
+            //jumps to the offsets and reads the bytes
+            byte[] buffer = new byte[Size];
+            FileStream.Seek(Offset, SeekOrigin.Begin);
+            FileStream.Read(buffer, 0, Size);
+            return buffer;
         }
     }
 }

src/apphost-extract/apphost-extract/AppHostFileHeader.cs

@@ -9,19 +9,17 @@ namespace apphost_extract
 {
     public class AppHostFileHeader
     {
-        private const int HEADER_OFFSET = 0x1DE7E2;
         private const int HEADER_SIZE = 0xD;
 
         private byte[] Raw;
 
         public string Path { get; set; }
-        public int EmbeddedFilesCount { get; set; }
         
         public AppHostManifest Manifest { get; set; }
 
-        public AppHostFileHeader(FileStream File)
+        public AppHostFileHeader(FileStream File, int HeaderOffset)
         {
-            File.Seek(HEADER_OFFSET, SeekOrigin.Begin);
+            File.Seek(HeaderOffset, SeekOrigin.Begin);
             byte[] headerBuffer = new byte[HEADER_SIZE];
             File.Read(headerBuffer, 0, HEADER_SIZE);
             Raw = headerBuffer;
@@ -29,8 +27,11 @@ namespace apphost_extract
             byte[] stringBuffer = new byte[Raw[0xC]];
             File.Read(stringBuffer, 0, stringBuffer.Length);
             Path = Encoding.UTF8.GetString(stringBuffer);
+            Log.Info("Header parsed successfully!");
 
             Manifest = new AppHostManifest(File, BitConverter.ToInt32(Raw, 0x8));
+
+           
         }
 
         

src/apphost-extract/apphost-extract/AppHostManifest.cs

@@ -20,6 +20,9 @@ namespace apphost_extract
                 AppHostFileEntry entry = new AppHostFileEntry(File);
                 entries.Add(entry);
             }
+            FileEntries = entries.AsReadOnly();
+
+            Log.Info("Manifest parsed successfully!");
         }
     }
 }

src/apphost-extract/apphost-extract/Program.cs

@@ -1,6 +1,8 @@
 using System;
 using System.Collections.Generic;
+using System.IO;
 using System.Linq;
+using System.Reflection;
 using System.Text;
 using System.Threading.Tasks;
 
@@ -10,9 +12,49 @@ namespace apphost_extract
     {
         static void Main(string[] args)
         {
-            string path = "testapp.exe";
-            var file = AppHostFile.Open(path);
-            
+            Log.Info("apphost-extract by VollRagm\n", ConsoleColor.Yellow);
+            var path = GetPath(args);
+            var file = AppHostFile.Open(path.FullName);
+            Log.Info($"{file.Header.Manifest.FileEntries.Count} embedded file(s) found.");
+
+            var directory = Path.Combine(path.DirectoryName, path.Name.Remove(path.Name.Length - path.Extension.Length) +"_extracted");
+            Console.WriteLine();
+            Log.Info("Extracting...");
+
+            file.ExtractAll(directory);
+
+            Console.WriteLine();
+            Log.Info("Done.");
+            file.Close();
+            Console.ReadLine();
+        }
+
+        static FileInfo GetPath(string[] args)
+        {
+            try
+            {
+                var fileName = new FileInfo(Assembly.GetExecutingAssembly().Location).Name;
+
+                if (args.Length > 0)
+                {
+                    if (File.Exists(args[0]))
+                    {
+                        return new FileInfo(args[0]);
+                    }
+                    else
+                    {
+                        Log.Fatal($"{args[0]} could not be found. Usage: {fileName} <exe-path>");
+                    }
+                }
+                else
+                {
+                    Log.Fatal($"No File provided. Usage: {fileName} <exe-path>");
+                }
+            }catch(Exception ex)
+            {
+                Log.Fatal($"Could not get file: {ex.Message}");
+            }
+            return null;
         }
     }
 }