Call of Duty 5: FastFile Study

*** Article and investigation in early progress ***

Article looking at how fast files are made and how the process is coded, hope this is useful to people who want to know a little bit more on how the fast file process is handled.

New information regarding fast files

Due to the strings in the linker_pc.exe, I have discovered that the encrypter that Infinity Ward and Treyarch use is "libtomcrypt-1.17", this is an open source program that is available here

<syntaxhighlight lang="cpp"> private void ModBuildFastFileDelegate(Process lastProcess) { if (this.LauncherModBuildFastFilesCheckBox.Checked) { Launcher.CopyFileSmart(Path.Combine(Launcher.GetModDirectory(this.modName), "mod.csv"), Path.Combine(Launcher.GetZoneSourceDirectory(), "mod.csv")); } this.LaunchProcessHelper(this.LauncherModBuildFastFilesCheckBox.Checked, new ProcessFinishedDelegate(this.ModBuildMoveModFastFileDelegate), Launcher.GetLanguage() + " -moddir " + this.modName + " mod"); } </syntaxhighlight>


<syntaxhighlight lang="cpp"> private void CompileLevelMoveFastFilesDelegate(Process lastProcess) { string zoneDirectory = Launcher.GetZoneDirectory(); string str2 = Launcher.mapSettings.GetBoolean("compile_modenabled") ? Launcher.GetModDirectory(Launcher.mapSettings.GetString("compile_modname")) : Path.Combine(Launcher.GetUsermapsDirectory(), this.mapName); string str3 = this.mapName + ".ff"; string str4 = this.mapName + "_load.ff"; Launcher.MoveFile(Path.Combine(str3), Path.Combine(str3)); Launcher.MoveFile(Path.Combine(str3), Path.Combine(str3)); Launcher.MoveFile(Path.Combine(str4), Path.Combine(str4)); Launcher.Publish(); this.CompileLevelRunGameDelegate(lastProcess); } </syntaxhighlight>


<syntaxhighlight lang="cpp"> public static void CreateZoneSourceFiles(string mapName) { using (StreamWriter writer = new StreamWriter(GetZoneSourceFile(IsMP(writer.WriteLine("ignore,code_post_gfx_mp"); WriteLine("ignore,common_mp"); WriteLine("col_map_mp,maps/mp/" + writer.WriteLine("rawfile,maps/mp/" + writer.WriteLine("rawfile,maps/mp/" + writer.WriteLine("sound,common," + writer.WriteLine("sound,generic," + writer.WriteLine("sound,voiceovers," + writer.WriteLine("sound,multiplayer," + string GetRawDirectory(); </syntaxhighlight>


What I believe this means, with the little coding I know, I think in the fast file, they combine the d3dbsp with the "launcherCS.launcher" file, and they also combine the zone source directory with the d3dbsp, what i'm I missing?
The more I look into it, the more I realize the launcher.cs.launcher file is mostly just calling every string, I will post more of the file later today. Here is part of the launcher.cs.launcher file, like stated above, its just calling strings.


<syntaxhighlight lang="cpp"> public static string GetRawMapsDirectory(); public static string GetRootDirectory(); etc.... </syntaxhighlight> --Theoneman 16:27, 3 January 2012 (UTC)

The code you posted has nothing to do with fastfile compilation, it's the code of modbuilder, which generates a zone file (csv) for compilation. Not sure about encryption, the fastfile isn't in the first place. Remove the first 12 bytes and decompress with zlib, will give you a block file with many unencrypted data such as map entities. If there's encryption involved, then they did it for certain parts only. --CoDEmanX 12:47, 10 March 2012 (UTC)