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(FPK): support archives with encrypted index.

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This commit is contained in:
morkt 2016-09-05 07:39:39 +04:00
parent ad8504179e
commit f6b729e5d9
2 changed files with 60 additions and 9 deletions
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61
ArcFormats/Interheart/ArcFPK.cs
View File

@ -2,7 +2,7 @@
//! \date Mon May 25 10:01:24 2015
//! \brief FPK resource archives implementation.
//
// Copyright (C) 2015 by morkt
// Copyright (C) 2015-2016 by morkt
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to
@ -42,17 +42,29 @@ namespace GameRes.Formats.CandySoft
public override ArcFile TryOpen (ArcView file)
{
int count = file.View.ReadInt32 (0);
if (!IsSaneCount (count))
if (file.MaxOffset < 0x10)
return null;
int count = file.View.ReadInt32 (0);
List<Entry> dir = null;
try
if (count < 0)
{
dir = ReadIndex (file, count, 0x10);
count &= 0x7FFFFFFF;
if (!IsSaneCount (count))
return null;
dir = ReadEncryptedIndex (file, count);
}
else
{
if (!IsSaneCount (count))
return null;
try
{
dir = ReadIndex (file, count, 0x10);
}
catch { /* read failed, try another filename length */ }
if (null == dir)
dir = ReadIndex (file, count, 0x18);
}
catch { /* read failed, try another filename length */ }
if (null == dir)
dir = ReadIndex (file, count, 0x18);
if (null == dir)
return null;
return new ArcFile (file, this, dir);
@ -81,6 +93,39 @@ namespace GameRes.Formats.CandySoft
return dir;
}
private List<Entry> ReadEncryptedIndex (ArcView file, int count)
{
file.View.Reserve (file.MaxOffset-8, 8);
uint index_offset = file.View.ReadUInt32 (file.MaxOffset-4);
if (index_offset < 4 || index_offset >= file.MaxOffset-8)
return null;
var key = file.View.ReadBytes (file.MaxOffset-8, 4);
int name_size = 0x18;
int index_size = count * (12 + name_size);
var index = file.View.ReadBytes (index_offset, (uint)index_size);
if (index.Length != index_size)
return null;
for (int i = 0; i < index.Length; ++i)
index[i] ^= key[i & 3];
int index_pos = 0;
var dir = new List<Entry> (count);
for (int i = 0; i < count; ++i)
{
string name = Binary.GetCString (index, index_pos+8, name_size);
if (string.IsNullOrWhiteSpace (name))
return null;
var entry = FormatCatalog.Instance.Create<Entry> (name);
entry.Offset = LittleEndian.ToUInt32 (index, index_pos);
entry.Size = LittleEndian.ToUInt32 (index, index_pos+4);
if (!entry.CheckPlacement (file.MaxOffset))
return null;
dir.Add (entry);
index_pos += 12 + name_size;
}
return dir;
}
public override Stream OpenEntry (ArcFile arc, Entry entry)
{
var input = arc.File.CreateStream (entry.Offset, entry.Size);

8
supported.html
View File

@ -134,6 +134,7 @@ White ~blanche comme la lune~<br/>
<tr><td>*.dat</td><td><tt>NEKOPACK</tt></td><td>No</td><td>Rosebleu<br/>Lime</td><td>
Inpyuri -Hito to Anata to Ayakashi to-<br/>
Nostradamus ni Kiitemiro♪<br/>
Tiny Dungeon ~BLACK and WHITE~<br/>
</td></tr>
<tr class="odd"><td>*.dat</td><td>-</td><td>No</td><td>Meteor<br/>Silver Bullet</td><td>
Chokotto☆Vampire!<br/>
@ -486,6 +487,7 @@ Tsuribaka ~Gakuen Taikou! Joshikousei Tsuriage Adventure~<br/>
<tr><td>*.gr</td><td>-</td><td>No</td></tr>
<tr class="odd"><td>*.dat</td><td><tt>SPack</tt></td><td>No</td><td>Goku-Fero</td><td>Inchuu Reiki Elenova</tr>
<tr><td>*.fpk</td><td>-</td><td>No</td><td rowspan="2">Candy Soft<br/>Interheart</td><td rowspan="2">
Aimai Ren'ai<br/>
Chijoku no Kankei ~Inkou Kyoushi~<br/>
Chijoku no Kankei 2<br/>
Jii -Nozoki no Houshuu-<br/>
@ -1071,13 +1073,17 @@ Caramel Box Yarukibako<br/>
Kagiroi ~Shaku Kei~<br/>
L.i.n.k.<br/>
</td></tr>
<tr><td>*.lac</td><td><tt>LAC</tt></td><td>No</td><td rowspan="5">Leaf</td><td rowspan="5">
<tr><td>*.lac</td><td><tt>LAC</tt></td><td>No</td><td rowspan="8">Leaf</td><td rowspan="8">
Kimi ga Yobu, Megiddo no Oka de<br/>
ToHeart2 AnotherDays<br/>
</td></tr>
<tr><td>*.a</td><td><tt>\x1E\xAF</tt></td><td>No</td></tr>
<tr><td>*.am</td><td><tt>am00</tt></td><td>No</td></tr>
<tr><td>*.g</td><td>-</td><td>No</td></tr>
<tr><td>*.w</td><td>-</td><td>No</td></tr>
<tr><td>*.pak</td><td><tt>LAC</tt></td><td>No</td></tr>
<tr><td>*.tex</td><td><tt>TEX PACK0.02</tt></td><td>No</td></tr>
<tr><td>*.lgf</td><td><tt>lgf</tt></td><td>No</td></tr>
<tr class="odd"><td>*.ark</td><td>-</td><td>No</td><td>Irrlicht</td><td>
Alter Ego<br/>
</td></tr>