SaboteurExtractor.cs

using System;
using System.Diagnostics;
using System.IO;
using System.Text;

namespace SaboteurExtractor
{
	class Program
	{
		static void Main(string[] args)
		{
			Extract(
				@"E:\Users\Will\Downloads\Start0.kiloPack",
				@"E:\Users\Will\Downloads\Start0"
			);
			Extract(
				@"E:\Users\Will\Downloads\Mega2.megaPack",
				@"E:\Users\Will\Downloads\Mega2"
			);
		}

		static void Extract(string p_filePath, string p_outputDir)
		{
			using (BinaryReader br = new BinaryReader(File.OpenRead(p_filePath)))
			{
				string magic = Encoding.ASCII.GetString(br.ReadBytes(4));
				Debug.Assert(magic == "00PM");

				int numFiles = br.ReadInt32();
				file_header_t[] headers = new file_header_t[numFiles];
				ulong[] hashes = new ulong[numFiles];

				for (int i = 0; i < numFiles; i++)
				{
					headers[i] = new file_header_t(br);
				}
				for (int i = 0; i < numFiles; i++)
				{
					hashes[i] = br.ReadUInt64();
				}
				for (int i = 0; i < numFiles; i++)
				{
					Debug.Assert(headers[i].hash == hashes[i]);
				}

				if (Directory.Exists(p_outputDir) == false)
				{
					Directory.CreateDirectory(p_outputDir);
				}

				for (int i = 0; i < numFiles; i++)
				{
					FileInfo outputFile = new FileInfo(
						Path.Combine(
							p_outputDir,
							string.Format("{0}_{1:X16}.bin", i, headers[i].hash)
						)
					);

					br.BaseStream.Position = headers[i].offset;
					using (BinaryWriter bw = new BinaryWriter(File.OpenWrite(outputFile.FullName)))
					{
						Console.WriteLine(outputFile.Name);
						bw.Write(br.ReadBytes(headers[i].length));
					}
				}
			}
		}

		struct file_header_t
		{
			public ulong hash;
			public int length;
			public int offset;
			public uint unknown;

			public file_header_t(BinaryReader p_reader)
			{
				hash = p_reader.ReadUInt64();
				length = p_reader.ReadInt32();
				offset = p_reader.ReadInt32();
				unknown = p_reader.ReadUInt32();
				Debug.Assert(unknown == 0);
			}
		}
	}
}