From 162e6dd552e7555e1c7b4bf369ee110697d62934 Mon Sep 17 00:00:00 2001
From: VollRahm <vollrahm@gmail.com>
Date: Fri, 22 Jan 2021 19:51:07 +0100
Subject: [PATCH] Implemented part of the File structure

---
 .../apphost-extract/AppHostFile.cs            | 41 +++++++++++++
 .../apphost-extract/AppHostFileEntry.cs       | 12 ++++
 .../apphost-extract/AppHostFileHeader.cs      | 40 ++++++++++++
 .../apphost-extract/AppHostManifest.cs        | 19 ++++++
 src/apphost-extract/apphost-extract/Log.cs    | 61 +++++++++++++++++++
 .../apphost-extract/Program.cs                |  3 +
 .../apphost-extract/apphost-extract.csproj    |  4 ++
 7 files changed, 180 insertions(+)
 create mode 100644 src/apphost-extract/apphost-extract/AppHostFile.cs
 create mode 100644 src/apphost-extract/apphost-extract/AppHostFileEntry.cs
 create mode 100644 src/apphost-extract/apphost-extract/AppHostFileHeader.cs
 create mode 100644 src/apphost-extract/apphost-extract/AppHostManifest.cs
 create mode 100644 src/apphost-extract/apphost-extract/Log.cs

diff --git a/src/apphost-extract/apphost-extract/AppHostFile.cs b/src/apphost-extract/apphost-extract/AppHostFile.cs
new file mode 100644
index 0000000..f04ce35
--- /dev/null
+++ b/src/apphost-extract/apphost-extract/AppHostFile.cs
@@ -0,0 +1,41 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace apphost_extract
+{
+    public class AppHostFile
+    {
+        private FileStream FileStream;
+
+        public AppHostFileHeader Header { get; set; }
+
+
+        public AppHostFile(FileStream fileStream) 
+        {
+            FileStream = fileStream;
+            Header = new AppHostFileHeader(FileStream);
+        }
+
+
+        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);
+                return file;
+            }
+            catch(Exception ex)
+            {
+                Log.Fatal($"Exception when trying to open file: {ex.Message}");
+                return null;
+            }
+        }
+    }
+}
diff --git a/src/apphost-extract/apphost-extract/AppHostFileEntry.cs b/src/apphost-extract/apphost-extract/AppHostFileEntry.cs
new file mode 100644
index 0000000..05bc4ea
--- /dev/null
+++ b/src/apphost-extract/apphost-extract/AppHostFileEntry.cs
@@ -0,0 +1,12 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace apphost_extract
+{
+    public class AppHostFileEntry
+    {
+    }
+}
diff --git a/src/apphost-extract/apphost-extract/AppHostFileHeader.cs b/src/apphost-extract/apphost-extract/AppHostFileHeader.cs
new file mode 100644
index 0000000..cb672c3
--- /dev/null
+++ b/src/apphost-extract/apphost-extract/AppHostFileHeader.cs
@@ -0,0 +1,40 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace apphost_extract
+{
+    public class AppHostFileHeader
+    {
+        private const int HEADER_OFFSET = 0x1DE7E2;
+        private const int HEADER_SIZE = 0xD;
+
+        private byte[] Raw;
+
+        public byte PathLength { get; set; }
+        public string Path { get; set; }
+        public int EmbeddedFilesCount { get; set; }
+        
+        public AppHostManifest Manifest { get; set; }
+
+        public AppHostFileHeader(FileStream File)
+        {
+            File.Seek(HEADER_OFFSET, SeekOrigin.Begin);
+            byte[] headerBuffer = new byte[HEADER_SIZE];
+            File.Read(headerBuffer, 0, HEADER_SIZE);
+            Raw = headerBuffer;
+            PathLength = Raw[0xC];
+
+            byte[] stringBuffer = new byte[PathLength];
+            File.Read(stringBuffer, 0, stringBuffer.Length);
+            Path = Encoding.UTF8.GetString(stringBuffer);
+
+            Manifest = new AppHostManifest(File, BitConverter.ToInt32(Raw, 0x8));
+        }
+
+        
+    }
+}
diff --git a/src/apphost-extract/apphost-extract/AppHostManifest.cs b/src/apphost-extract/apphost-extract/AppHostManifest.cs
new file mode 100644
index 0000000..9dff1b5
--- /dev/null
+++ b/src/apphost-extract/apphost-extract/AppHostManifest.cs
@@ -0,0 +1,19 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace apphost_extract
+{
+    public class AppHostManifest
+    {
+        public IReadOnlyList<AppHostFileEntry> FileEntries { get; set; }
+
+        public AppHostManifest(FileStream File, int embeddedFileCount)
+        {
+            
+        }
+    }
+}
diff --git a/src/apphost-extract/apphost-extract/Log.cs b/src/apphost-extract/apphost-extract/Log.cs
new file mode 100644
index 0000000..1dc267c
--- /dev/null
+++ b/src/apphost-extract/apphost-extract/Log.cs
@@ -0,0 +1,61 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+public static class Log
+{
+    public static void Critical(object value)
+    {
+        Color(ConsoleColor.Magenta);
+        Console.WriteLine("[!] " + value.ToString());
+        Color();
+    }
+
+    public static void Info(object value)
+    {
+        Color(ConsoleColor.Cyan);
+        Console.WriteLine("[+] " + value.ToString());
+    }
+
+    public static bool QueryYesNo(string question)
+    {
+        var input = QueryString(question);
+        if (input.ToLower().StartsWith("y")) return true;
+        else return false;
+    }
+
+    public static string QueryString(string question)
+    {
+        Color(ConsoleColor.Yellow);
+        Console.Write("[?] " + question);
+        Color();
+        return Console.ReadLine();
+    }
+
+    public static void Info(object value, ConsoleColor color)
+    {
+        Color(color);
+        Console.WriteLine("[+] " + value.ToString());
+    }
+
+    public static void Error(object value)
+    {
+        Color(ConsoleColor.Red);
+        Console.WriteLine("[-] " + value.ToString());
+        Color();
+    }
+
+    public static void Fatal(object value)
+    {
+        Error(value);
+        Console.ReadLine();
+        Environment.Exit(0);
+    }
+
+    private static void Color(ConsoleColor color = ConsoleColor.White)
+    {
+        Console.ForegroundColor = color;
+    }
+}
diff --git a/src/apphost-extract/apphost-extract/Program.cs b/src/apphost-extract/apphost-extract/Program.cs
index 34a69a5..6266206 100644
--- a/src/apphost-extract/apphost-extract/Program.cs
+++ b/src/apphost-extract/apphost-extract/Program.cs
@@ -10,6 +10,9 @@ namespace apphost_extract
     {
         static void Main(string[] args)
         {
+            string path = "testapp.exe";
+            var file = AppHostFile.Open(path);
+            
         }
     }
 }
diff --git a/src/apphost-extract/apphost-extract/apphost-extract.csproj b/src/apphost-extract/apphost-extract/apphost-extract.csproj
index 86d3a6d..5b4c330 100644
--- a/src/apphost-extract/apphost-extract/apphost-extract.csproj
+++ b/src/apphost-extract/apphost-extract/apphost-extract.csproj
@@ -43,6 +43,10 @@
     <Reference Include="System.Xml" />
   </ItemGroup>
   <ItemGroup>
+    <Compile Include="AppHostFile.cs" />
+    <Compile Include="AppHostFileHeader.cs" />
+    <Compile Include="AppHostManifest.cs" />
+    <Compile Include="Log.cs" />
     <Compile Include="Program.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
   </ItemGroup>