Cabinet File (*.CAB) Compression and Extraction

using System;
using System.IO;
using System.Text;
using System.Reflection;
using System.Collections;
using System.Runtime.InteropServices;

namespace Demo
{
	class CabLibDemo
	{
		[DllImport("kernel32.dll", EntryPoint="GetWindowsDirectoryA", CharSet=CharSet.Ansi)]
		private static extern int GetWindowsDirectory(StringBuilder s_Text, int MaxCount); 

		[DllImport("kernel32.dll", EntryPoint="GetCurrentDirectoryA", CharSet=CharSet.Ansi)]
		private static extern int GetCurrentDirectory(int MaxCount, StringBuilder s_Text); 

		[STAThread]
		static void Main(string[] args)
		{
			// Change this to split the archive into multiple files (200000 --> CAB split size = 200kB)
			// ATTENTION: In this case Parameter 1 of CompressFile() MUST contain "%d"
			int s32_SplitSize = 0x7FFFFFFF;

			// Store filetimes as UTC in CAB files
			bool b_UtcTime = true;

			// You can specify your own key for CAB encryption here (the longer the more secure, up to 5000 characters)

			String s_EncryptionKey = ""; // to handle CAB files without encryption
//			String s_EncryptionKey = "AH%KJ/76?KJ�H�\\��dghf7(ZTbjasdf82iz<sx87qpc5ba&m;-@^l#";

			// ########################## Initialization ############################


			StringBuilder s_WinDir = new StringBuilder(500);
			GetWindowsDirectory(s_WinDir, 500);

			String s_Explorer = s_WinDir + "\\Explorer.exe";
			String s_Notepad  = s_WinDir + "\\Notepad.exe";

			StringBuilder s_WorkDir = new StringBuilder(500);
			GetCurrentDirectory(500, s_WorkDir);

			String s_CompressDir = s_WorkDir + "\\_Compressed";
			String s_DecryptDir  = s_WorkDir + "\\_Decrypted";
			String s_ResourceDir = s_WorkDir + "\\_ExtractResource";
			String s_StreamDir   = s_WorkDir + "\\_ExtractStream";

			String s_CompressFile = s_CompressDir + "\\Packed_%d.cab";

			CabLib.Compress i_Compress = new CabLib.Compress();
			CabLib.Extract  i_Extract  = new CabLib.Extract();

			i_Compress.SetEncryptionKey(s_EncryptionKey);
			i_Extract. SetDecryptionKey(s_EncryptionKey);

			// ########################## Compress demo ############################

			// This will pack Explorer.exe and Notepad.exe into a CAB file with subfolders

			Console.WriteLine("                      CAB FILE COMPRESSION\n");

			try
			{
				ArrayList i_Files = new ArrayList();
				i_Files.Add(new string[] { s_Explorer, @"FileManager\Explorer.exe" });
				i_Files.Add(new string[] { s_Notepad,  @"TextManager\Notepad.exe"  });

				i_Compress.CompressFileList(i_Files, s_CompressFile, b_UtcTime, s32_SplitSize);

				Console.WriteLine("SUCCESS: Compressed Explorer.exe and Notepad.exe into cabinet in\n" + s_CompressDir);
			}
			catch (Exception Ex)
			{
				Console.WriteLine(Ex.Message);
				goto _RESOURCE;
			}

			// ########################## Decrypt demo ############################

			// This will decrypt the CAB file which was encrypted above

			if (s_EncryptionKey.Length == 0) // Skip the following if the file was not encrypted 
				goto _RESOURCE;

			Console.WriteLine("----------------------------------------------------------------");
			Console.WriteLine("\n                   CAB FILE DECRYPTION\n");

			// "Packed_%d.cab" --> "Packed_1.cab"
			s_CompressFile = s_CompressFile.Replace("%d", "1");

			try
			{
				// Now extract into subdirectory "_Decrypted" and the corresponding subdirectories in the CAB file
				i_Extract.ExtractFile(s_CompressFile, s_DecryptDir);
			
				Console.WriteLine("SUCCESS: Decrypted all files from the above encrypted cabinet to\n" + s_DecryptDir);
			}
			catch (Exception Ex)
			{
				Console.WriteLine(Ex.Message);
			}

			// ########################## Extract Win32 resource demo ############################

			// This will extract the file "Test.cab" in the embedded Win32 CabLib.dll resources

			_RESOURCE:
			i_Extract.SetDecryptionKey(""); // not needed anymore for resource extraction
			
			Console.WriteLine("----------------------------------------------------------------");
			Console.WriteLine("\n                 WIN32 CAB RESOURCE EXTRACTION\n");

			try
			{
				// Extract only one file from the cabinet which must be in the root folder!!
//				i_Extract.SetSingleFile("Root.txt");

				// Now extract into subdirectory "_ExtractResource" and the corresponding subdirectories in the CAB file
				i_Extract.ExtractResource("CabLib.dll", 101, "CABFILE", s_ResourceDir);

				Console.WriteLine("SUCCESS: Extracted all files from Win32 resource Test.cab in CabLib.dll to\n" + s_ResourceDir);
			}
			catch (Exception Ex)
			{
				Console.WriteLine(Ex.Message);
			}

			// ########################## Extract Stream demo ############################

			// This will extract the file "Test.cab" in the embedded CabLibDemo.exe resources

			Console.WriteLine("----------------------------------------------------------------");
			Console.WriteLine("\n                 .NET CAB STREAM EXTRACTION\n");

			try
			{
				Assembly i_Ass  = Assembly.GetExecutingAssembly();
				Stream   i_Strm = i_Ass.GetManifestResourceStream("CabLibDemo.Resources.Test.cab");

				// Attach the event handler
//				CabLib.Extract.delBeforeCopyFile i_Delegate = new CabLib.Extract.delBeforeCopyFile(OnBeforeCopyFile);
//				i_Extract.evBeforeCopyFile += i_Delegate;

				// Now extract into subdirectory "_ExtractStream" and the corresponding subdirectories in the CAB file
				i_Extract.ExtractStream(i_Strm, s_StreamDir);

//				i_Extract.evBeforeCopyFile -= i_Delegate;

				Console.WriteLine("SUCCESS: Extracted all files from .NET resource Test.cab in CabLibDemo.exe to\n" + s_StreamDir);
			}
			catch (Exception Ex)
			{
				Console.WriteLine(Ex.Message);
			}

			// Under some cirumstances the DOS window disappears immediately, so you cannot read anything!
			Console.WriteLine("\nHit any key to exit");
			Console.Read();
		}

		/// <summary>
		/// This event handler is called for every extratced file before it is written to disk
		/// return false here if you want a file not to be extracted
		/// </summary>
		static private bool OnBeforeCopyFile(CabLib.Extract.kCabinetFileInfo k_Info)
		{
			Console.WriteLine("Extracting " + k_Info.s_SubFolder + k_Info.s_File);
			return true;
		}

	}
}