GARbro-mirror/ArcFormats/Aims/ArcPACK.cs

118 lines
4.5 KiB
C#
Raw Normal View History

2018-03-21 13:49:48 +08:00
//! \file ArcPACK.cs
//! \date 2018 Mar 20
//! \brief AIMS engine resource archive.
//
// Copyright (C) 2018 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
// deal in the Software without restriction, including without limitation the
// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
// sell copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
// IN THE SOFTWARE.
//
using System.Collections.Generic;
using System.ComponentModel.Composition;
using System.IO;
using GameRes.Compression;
using GameRes.Cryptography;
namespace GameRes.Formats.Aims
{
internal class LunaArchive : ArcFile
{
public readonly byte[] Key;
public LunaArchive (ArcView arc, ArchiveFormat impl, ICollection<Entry> dir, byte[] key)
: base (arc, impl, dir)
{
Key = key;
}
}
[Export(typeof(ArchiveFormat))]
public class PackOpener : ArchiveFormat
{
public override string Tag { get { return "PACK/AIMS"; } }
public override string Description { get { return "AIMS engine resource archive"; } }
public override uint Signature { get { return 0x4B434150; } } // 'PACK'
public override bool IsHierarchic { get { return true; } }
public override bool CanWrite { get { return false; } }
public PackOpener ()
{
2019-03-20 17:31:14 +08:00
Extensions = new string[] { "p", "mus", "pac" };
2018-03-21 13:49:48 +08:00
}
// entry record
// 0x00 name
// 0x40 name crc32
// 0x44 data crc32
// 0x48 offset
// 0x4C size
public override ArcFile TryOpen (ArcView file)
{
int count = file.View.ReadInt32 (4);
if (!IsSaneCount (count))
return null;
uint index_offset = 8;
var dir = new List<Entry> (count);
for (int i = 0; i < count; ++i)
{
var name = file.View.ReadString (index_offset, 0x40);
var entry = FormatCatalog.Instance.Create<PackedEntry> (name);
entry.Offset = file.View.ReadUInt32 (index_offset+0x48);
entry.Size = file.View.ReadUInt32 (index_offset+0x4C);
if (!entry.CheckPlacement (file.MaxOffset))
return null;
dir.Add (entry);
index_offset += 0x50;
}
return new LunaArchive (file, this, dir, DefaultKey);
}
public override Stream OpenEntry (ArcFile arc, Entry entry)
{
var larc = arc as LunaArchive;
if (null == arc || !arc.File.View.AsciiEqual (entry.Offset, "LZSS"))
return base.OpenEntry (arc, entry);
uint unpacked_size = arc.File.View.ReadUInt32 (entry.Offset+4);
Stream input = arc.File.CreateStream (entry.Offset+8, entry.Size-8);
if (larc.Key != null)
{
var bf = new Blowfish (larc.Key);
input = new InputCryptoStream (input, bf.CreateDecryptor());
return new LimitStream (input, unpacked_size);
}
else
{
var lz = new LzssStream (input);
lz.Config.FrameInitPos = 0xFF0;
return lz;
}
}
static readonly byte[] DefaultKey = {
0x7D, 0x73, 0xF6, 0xE4, 0xF5, 0x81, 0x5F, 0x7C, 0x78, 0x30, 0xC2, 0x36, 0xEA, 0x3E, 0x8A, 0x76,
0xF7, 0xE0, 0x48, 0xB5, 0x85, 0xD7, 0x77, 0x49, 0x4C, 0x3D, 0xF5, 0x0C, 0xBB, 0xFB, 0x2E, 0x44,
0xFE, 0x25, 0xB7, 0xEB, 0xC7, 0xD9, 0x33, 0xAB, 0xA8, 0x2C, 0x64, 0xE8, 0xF0, 0xBD, 0xEB, 0x8D,
0x9D, 0x1D, 0xA2, 0xFC, 0x59, 0x09, 0xAA, 0xA4,
};
}
}