allowing for manual offset entry in case auto analysis fails

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

@@ -27,27 +27,28 @@ namespace apphost_extract_v2
 
         public IApphostFile Open()
         {
-            var textSegment = PEHeader.GetSegment(".text");
+              var textSegment = PEHeader.GetSegment(".text");
 
-            var sw = Stopwatch.StartNew();
-            Log.Info("Scanning for version string pointer...");
+              var sw = Stopwatch.StartNew();
+              Log.Info("Scanning for version string pointer...");
 
-            var sigscanResults = PatternScan(File, 
-                                textSegment.PointerToRawData, textSegment.SizeOfRawData,
-                                    VERSION_SIGNATURE, VERSION_SIGNATURE_MASK);
-            sw.Stop();
+              var sigscanResults = PatternScan(File, 
+                                  textSegment.PointerToRawData, textSegment.SizeOfRawData,
+                                      VERSION_SIGNATURE, VERSION_SIGNATURE_MASK);
+              sw.Stop();
 
-            if (sigscanResults.Length == 0)
-                return null;
-           
-            var versionOffset = (int)BitConverter.ToUInt32(File.ReadBuffer(sigscanResults[0] + 3, 4));
-            var versionStringPtr = PEHeader.AddVirtualOffset(sigscanResults[0] + 7, versionOffset);
-            var versionString = Encoding.Unicode.GetString(
-                                                File.ReadBuffer(
-                                                    versionStringPtr, 6));
+              if (sigscanResults.Length == 0)
+                  return null;
+
+              var versionOffset = (int)BitConverter.ToUInt32(File.ReadBuffer(sigscanResults[0] + 3, 4));
+              var versionStringPtr = PEHeader.AddVirtualOffset(sigscanResults[0] + 7, versionOffset);
+              var versionString = Encoding.Unicode.GetString(
+                                                  File.ReadBuffer(
+                                                      versionStringPtr, 6));
+
+              Log.Info($"Found version string at 0x{versionStringPtr:X8} in {sw.ElapsedMilliseconds}ms -> {versionString}");
+              Console.WriteLine();
 
-            Log.Info($"Found version string at 0x{versionStringPtr:X8} in {sw.ElapsedMilliseconds}ms -> {versionString}");
-            Console.WriteLine();
 
             switch (versionString)
             {
@@ -63,5 +64,22 @@ namespace apphost_extract_v2
                     return null;
             }
         }
+
+        public IApphostFile Open(string versionString, uint headerOffset)
+        {
+            switch (versionString)
+            {
+                case "3.0":
+                    return new ApphostFile30(File, PEHeader, headerOffset);
+
+                case "3.1":
+                    return new ApphostFile31(File, PEHeader, headerOffset);
+
+                case "5":
+                    return new ApphostFile5(File, PEHeader, headerOffset);
+                default:
+                    return null;
+            }
+        }
     }
 }

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

@@ -30,6 +30,23 @@ namespace apphost_extract_v2.Models
             Header.Manifest = ParseManifest();
         }
 
+        public ApphostFile30(FileStream fs, PEHeaders peheader, uint headerOffset) : base(fs, peheader)
+        {
+            Header = new AppHostFileHeader();
+            Log.Info($"Reading header at 0x{HEADER_OFFSET_PTR:X8}...");
+            var headerAddress = headerOffset;
+
+            if (headerAddress == 0)
+                Log.Fatal("The address of the Bundle header is 0 :/");
+
+            var headerBuffer = fs.ReadBuffer(headerAddress, HEADER_SIZE);
+
+            Header.Raw = headerBuffer;
+            Header.Path = Encoding.UTF8.GetString(fs.ReadBuffer(headerAddress + HEADER_SIZE, 0xC));
+
+            Header.Manifest = ParseManifest();
+        }
+
         private AppHostManifest ParseManifest()
         {
             AppHostManifest manifest = new AppHostManifest();

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

@@ -29,6 +29,22 @@ namespace apphost_extract_v2.Models
             Header.Manifest = ParseManifest();
         }
 
+        public ApphostFile31(FileStream fs, PEHeaders peheader, uint headerOffset) : base(fs, peheader)
+        {
+            Header = new AppHostFileHeader();
+            var headerAddress = headerOffset;
+
+            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()
         {
             AppHostManifest manifest = new AppHostManifest();

src/apphost-extract/apphost-extract-v2/Models/ApphostFile5.cs

@@ -34,6 +34,24 @@ namespace apphost_extract_v2.Models
 
         }
 
+        public ApphostFile5(FileStream fs, PEHeaders peheader, uint headerOffset) : base(fs, peheader)
+        {
+            Header = new AppHostFileHeader();
+            var headerAddress = headerOffset;
+
+            if (headerAddress == 0)
+                Log.Fatal("Unable to located bundle header :/");
+
+            var headerBuffer = fs.ReadBuffer(headerAddress, HEADER_SIZE);
+
+            Header.Raw = headerBuffer;
+            Header.Path = Encoding.UTF8.GetString(
+                                fs.ReadBuffer(headerAddress + HEADER_SIZE, 0xC));
+
+            Header.Manifest = ParseManifest();
+
+        }
+
         private uint FindHeaderOffset()
         {
             var textSegment = PEHeader.GetSegment(".text");

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

@@ -18,9 +18,17 @@ namespace apphost_extract_v2
 
             var apphostAnalyzer = new Analyzer(fileInfo);
             var apphost = apphostAnalyzer.Open();
-       
-            if(apphost == null)
-                Log.Fatal("Unable to determine apphost version.");
+
+            if (apphost == null)
+            {
+                Log.Error("Unable to determine apphost version automatically.");
+                var version = Log.QueryString("Please enter the apphost version, you can find it in the entry point of the app (3.0, 3.1, 5): ");
+                var headerOffset = uint.Parse(Log.QueryString("Please enter the Header offset \n(parse pdb, search for header_offset in names or\n use string reference 'Bundle Header Offset: [%lx]', find the .data ptr and enter its value): ").Replace("0x", ""), System.Globalization.NumberStyles.HexNumber);
+                
+                apphostAnalyzer = new Analyzer(fileInfo);
+                apphost = apphostAnalyzer.Open(version, headerOffset);
+            }
+                
 
             Log.Info("File parsed successfully, extracting contents...");
             Console.WriteLine();

src/apphost-extract/apphost-extract-v2/Properties/launchSettings.json

@@ -0,0 +1,7 @@
+{
+  "profiles": {
+    "apphost-extract-v2": {
+      "commandName": "Project"
+    }
+  }
+}