C# 真封神游戏 pak 文件解密代码

        public bool ReadZfsFile(string ZfsFile)
        {
            try
            {
                FileStream fs = new FileStream(ZfsFile, FileMode.Open, FileAccess.Read);
                BinaryReader r = new BinaryReader(fs);
                //文件头
                r.ReadBytes(0x1d);
                int mapoffset = r.ReadInt32();
                r.ReadInt32();
                int cnt = r.ReadInt32();
                mapoffset += 23;
                for (int i = 0; i < cnt; i++)
                {
                    //文件表
                    fs.Seek(mapoffset, SeekOrigin.Begin);
                    int namelen = r.ReadInt32();
                    char[] name = r.ReadChars(namelen);
                    int fileoffset = r.ReadInt32();
                    int filesize = r.ReadInt32();
                    mapoffset += namelen + 44;
                    //文件
                    fs.Seek(fileoffset, SeekOrigin.Begin);
                    string file = new string(name);
                    string dir = Path.GetDirectoryName(file);
                    if (dir.Length > 0) Directory.CreateDirectory(dir);
                    FileStream fw = new FileStream(file, FileMode.CreateNew);
                    BinaryWriter w = new BinaryWriter(fw);
                    byte[] con = r.ReadBytes(filesize);
                    w.Write(con);
                    w.Close();
                    fw.Close();
                }
                fs.Close();
                return true;
            }
            catch (Exception e)
            {
                MessageBox.Show(e.Message);
                return false;
            }


//用法：

            if (ReadZfsFile("gameworld_server.pak"))
            {
                MessageBox.Show("成功");
            }