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");
            }