public override ArcFile TryOpen(ArcView file)
{
if (!file.View.AsciiEqual(4, "PACK"))
{
return(null);
}
uint init_key = file.View.ReadUInt32(0xC);
var xdec = new NekoXCode(init_key);
uint seed = file.View.ReadUInt32(0x10);
var buffer = file.View.ReadBytes(0x14, 8);
xdec.Decrypt(seed, buffer, 0, 8);
uint index_size = LittleEndian.ToUInt32(buffer, 0);
if (index_size < 0x14 || index_size != LittleEndian.ToUInt32(buffer, 4))
{
return(null);
}
var index = new byte[(index_size + 7u) & ~7u];
if (file.View.Read(0x1C, index, 0, index_size) < index_size)
{
return(null);
}
xdec.Decrypt(seed, index, 0, index.Length);
using (var reader = new IndexReader(file, xdec, index, (int)index_size))
{
var dir = reader.Parse(0x1C + index.Length);
if (null == dir)
{
return(null);
}
reader.DetectTypes(dir, entry => {
uint key = file.View.ReadUInt32(entry.Offset);
file.View.Read(entry.Offset + 12, buffer, 0, 8);
xdec.Decrypt(key, buffer, 0, 8);
return(LittleEndian.ToUInt32(buffer, 0));
});
return(new NekoArchive(file, this, dir, xdec));
}
}
void DetectTypes(ArcView file, List <Entry> dir, NekoXCode dec)
{
byte[] buffer = new byte[8];
foreach (var entry in dir.Where(e => string.IsNullOrEmpty(e.Type)))
{
if (entry.Name.EndsWith(".txt", StringComparison.InvariantCultureIgnoreCase))
{
entry.Type = "script";
continue;
}
uint key = file.View.ReadUInt32(entry.Offset);
file.View.Read(entry.Offset + 12, buffer, 0, 8);
dec.Decrypt(key, buffer, 0, 8);
uint signature = LittleEndian.ToUInt32(buffer, 0);
var res = AutoEntry.DetectFileType(signature);
string ext = "";
if (res != null)
{
ext = res.Extensions.FirstOrDefault();
entry.Type = res.Type;
}
else if (0x474e4d8a == signature)
{
ext = "mng";
}
else if (entry.Name.StartsWith("script/"))
{
entry.Type = "script";
}
if (!string.IsNullOrEmpty(ext))
{
entry.Name = Path.ChangeExtension(entry.Name, ext);
}
}
}
void DetectTypes(ArcView file, List<Entry> dir, NekoXCode dec)
{
byte[] buffer = new byte[8];
foreach (var entry in dir.Where (e => string.IsNullOrEmpty (e.Type)))
{
if (entry.Name.EndsWith (".txt", StringComparison.InvariantCultureIgnoreCase))
{
entry.Type = "script";
continue;
}
uint key = file.View.ReadUInt32 (entry.Offset);
file.View.Read (entry.Offset+12, buffer, 0, 8);
dec.Decrypt (key, buffer, 0, 8);
uint signature = LittleEndian.ToUInt32 (buffer, 0);
var res = AutoEntry.DetectFileType (signature);
string ext = "";
if (res != null)
{
ext = res.Extensions.FirstOrDefault();
entry.Type = res.Type;
}
else if (0x474e4d8a == signature)
ext = "mng";
else if (entry.Name.StartsWith ("script/"))
entry.Type = "script";
if (!string.IsNullOrEmpty (ext))
entry.Name = Path.ChangeExtension (entry.Name, ext);
}
}
public override ArcFile TryOpen(ArcView file)
{
if (!file.View.AsciiEqual(4, "PACK"))
{
return(null);
}
uint init_key = file.View.ReadUInt32(0xC);
var xdec = new NekoXCode(init_key);
uint key = file.View.ReadUInt32(0x10);
var buffer = file.View.ReadBytes(0x14, 8);
xdec.Decrypt(key, buffer, 0, 8);
uint index_size = LittleEndian.ToUInt32(buffer, 0);
if (index_size != LittleEndian.ToUInt32(buffer, 4))
{
return(null);
}
var index = new byte[(index_size + 7u) & ~7u];
if (file.View.Read(0x1C, index, 0, index_size) < index_size)
{
return(null);
}
xdec.Decrypt(key, index, 0, index.Length);
var names_map = GetNamesMap(init_key, KnownDirNames);
var files_map = GetNamesMap(init_key, KnownFileNames.Value);
int index_pos = 0;
var dir = new List <Entry>();
long current_offset = 0x1C + index.Length;
while (index_pos < (int)index_size)
{
uint dir_hash = LittleEndian.ToUInt32(index, index_pos);
int count = LittleEndian.ToInt32(index, index_pos + 4);
if (count != LittleEndian.ToInt32(index, index_pos + 8))
{
break;
}
index_pos += 12;
string dir_name;
if (!names_map.TryGetValue(dir_hash, out dir_name))
{
dir_name = dir_hash.ToString("X8");
}
dir.Capacity = dir.Count + count;
for (int i = 0; i < count; ++i)
{
uint name_hash = LittleEndian.ToUInt32(index, index_pos);
uint size = LittleEndian.ToUInt32(index, index_pos + 4);
string file_name;
string type = "";
if (!files_map.TryGetValue(name_hash, out file_name))
{
file_name = name_hash.ToString("X8");
}
else
{
type = FormatCatalog.Instance.GetTypeFromName(file_name);
}
var entry = new Entry
{
Name = string.Format("{0}/{1}", dir_name, file_name),
Type = type,
Offset = current_offset,
Size = size,
};
if (!entry.CheckPlacement(file.MaxOffset))
{
return(null);
}
dir.Add(entry);
index_pos += 8;
current_offset += entry.Size;
}
}
if (0 == dir.Count)
{
return(null);
}
DetectTypes(file, dir, xdec);
return(new NekoArchive(file, this, dir, xdec));
}
public override ArcFile TryOpen(ArcView file)
{
if (!file.View.AsciiEqual (4, "PACK"))
return null;
uint init_key = file.View.ReadUInt32 (0xC);
var xdec = new NekoXCode (init_key);
uint key = file.View.ReadUInt32 (0x10);
var buffer = file.View.ReadBytes (0x14, 8);
xdec.Decrypt (key, buffer, 0, 8);
uint index_size = LittleEndian.ToUInt32 (buffer, 0);
if (index_size != LittleEndian.ToUInt32 (buffer, 4))
return null;
var index = new byte[(index_size + 7u) & ~7u];
if (file.View.Read (0x1C, index, 0, index_size) < index_size)
return null;
xdec.Decrypt (key, index, 0, index.Length);
var names_map = GetNamesMap (init_key, KnownDirNames);
var files_map = GetNamesMap (init_key, KnownFileNames.Value);
int index_pos = 0;
var dir = new List<Entry>();
long current_offset = 0x1C + index.Length;
while (index_pos < (int)index_size)
{
uint dir_hash = LittleEndian.ToUInt32 (index, index_pos);
int count = LittleEndian.ToInt32 (index, index_pos+4);
if (count != LittleEndian.ToInt32 (index, index_pos+8))
break;
index_pos += 12;
string dir_name;
if (!names_map.TryGetValue (dir_hash, out dir_name))
dir_name = dir_hash.ToString ("X8");
dir.Capacity = dir.Count + count;
for (int i = 0; i < count; ++i)
{
uint name_hash = LittleEndian.ToUInt32 (index, index_pos);
uint size = LittleEndian.ToUInt32 (index, index_pos+4);
string file_name;
string type = "";
if (!files_map.TryGetValue(name_hash, out file_name))
file_name = name_hash.ToString("X8");
else
type = FormatCatalog.Instance.GetTypeFromName (file_name);
var entry = new Entry
{
Name = string.Format ("{0}/{1}", dir_name, file_name),
Type = type,
Offset = current_offset,
Size = size,
};
if (!entry.CheckPlacement (file.MaxOffset))
return null;
dir.Add (entry);
index_pos += 8;
current_offset += entry.Size;
}
}
if (0 == dir.Count)
return null;
DetectTypes (file, dir, xdec);
return new NekoArchive (file, this, dir, xdec);
}
