- Multithreaded extraction

src/apphost-extract/apphost-extract-v2/FileChecker.cs

@@ -12,8 +12,8 @@ namespace apphost_extract_v2
     public static class FileChecker
     {
         private const string HASHFILE = "apphost-hashes.txt"; 
-        private static SHA256Managed sha = new SHA256Managed();
         private static string[] Hashes;
+        private static SHA256Managed sha = new SHA256Managed();
 
         public static void Load()
         {
@@ -30,7 +30,11 @@ namespace apphost_extract_v2
 
         public static bool IsKnownFile(byte[] buffer)
         {
-            var hash = BitConverter.ToString(sha.ComputeHash(buffer)).Replace("-", "");
+            string hash = "";
+            lock (sha)
+            {
+                hash = BitConverter.ToString(sha.ComputeHash(buffer)).Replace("-", "");
+            }
             return Hashes.Contains(hash) || SignedByMS(buffer);
         }
 

src/apphost-extract/apphost-extract-v2/Models/ApphostFile30.cs

@@ -18,6 +18,10 @@ namespace apphost_extract_v2.Models
             Header = new AppHostFileHeader();
             Log.Info($"Reading header at 0x{HEADER_OFFSET_PTR:X8}...");
             var headerAddress = BitConverter.ToInt32(fs.ReadBuffer(HEADER_OFFSET_PTR, 4));
+            
+            if(headerAddress == 0)
+                Log.Fatal("The address of the Bundle header is 0 :/");
+
             var headerBuffer = fs.ReadBuffer(headerAddress, HEADER_SIZE);
 
             Header.Raw = headerBuffer;

src/apphost-extract/apphost-extract-v2/Models/ApphostFile31.cs

@@ -17,13 +17,16 @@ namespace apphost_extract_v2.Models
         {
             Header = new AppHostFileHeader();
             var headerAddress = BitConverter.ToInt32(fs.ReadBuffer(HEADER_OFFSET_PTR, 4));
+
+            if (headerAddress == 0)
+                Log.Fatal("The address of the Bundle header is 0 :/");
+
             var headerBuffer = fs.ReadBuffer(headerAddress, HEADER_SIZE);
             Log.Info($"Reading header at 0x{HEADER_OFFSET_PTR:X8}...");
             Header.Raw = headerBuffer;
             Header.Path = Encoding.UTF8.GetString(fs.ReadBuffer(headerAddress + HEADER_SIZE, 0xC));
             
             Header.Manifest = ParseManifest();
-            
         }
 
         private AppHostManifest ParseManifest()

src/apphost-extract/apphost-extract-v2/Models/General/IApphostFile.cs

@@ -23,8 +23,8 @@ namespace apphost_extract_v2.General
         {
             Directory.CreateDirectory(outputDir);
           
-            foreach(var fileEntry in Header.Manifest.FileEntries)
-            //Parallel.ForEach(Header.Manifest.FileEntries, fileEntry =>
+            //foreach(var fileEntry in Header.Manifest.FileEntries)
+            Parallel.ForEach(Header.Manifest.FileEntries, fileEntry =>
             {
                 try
                 {
@@ -47,7 +47,7 @@ namespace apphost_extract_v2.General
                 {
                     Log.Error($"Could not extract {fileEntry.Name}: {ex.Message}");
                 }
-            }//);
+            });
             Console.WriteLine();
         }
 

src/apphost-extract/apphost-extract-v2/Program.cs

@@ -14,7 +14,7 @@ namespace apphost_extract_v2
 
             FileChecker.Load();
 
-            var fileInfo = GetFileInfo(new string[] { "net5.0.2.exe" });
+            var fileInfo = GetFileInfo(args);
 
             var apphostAnalyzer = new Analyzer(fileInfo);
             var apphost = apphostAnalyzer.Open();

src/apphost-extract/apphost-extract-v2/Util.cs

@@ -43,8 +43,11 @@ namespace apphost_extract_v2
         public static byte[] ReadBuffer(this FileStream fs, long start, int length)
         {
             byte[] buff = new byte[length];
-            fs.Seek(start, SeekOrigin.Begin);
-            fs.Read(buff, 0, length);
+            lock (fs)
+            {
+                fs.Seek(start, SeekOrigin.Begin);
+                fs.Read(buff, 0, length);
+            }
             return buff;
         }