GARbro-mirror/ArcFormats/NitroPlus/ArcNitro.cs
2016-05-21 10:31:09 +04:00

238 lines
9.0 KiB
C#

//! \file ArcNitro.cs
//! \date Wed Feb 25 20:28:14 2015
//! \brief Nitro+ PAK archives implementation.
//
// 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
// 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;
using System.Collections.Generic;
using System.ComponentModel.Composition;
using System.IO;
using System.Text;
using GameRes.Compression;
using GameRes.Utility;
namespace GameRes.Formats.NitroPlus
{
internal class PakEntry : Entry
{
public uint Key;
}
internal class NitroPak : ArcFile
{
public int Version;
public NitroPak (ArcView arc, ArchiveFormat impl, ICollection<Entry> dir, int version)
: base (arc, impl, dir)
{
Version = version;
}
}
[Export(typeof(ArchiveFormat))]
public class PakOpener : ArchiveFormat
{
public override string Tag { get { return "PAK/NITRO+"; } }
public override string Description { get { return "Nitro+ resource archive"; } }
public override uint Signature { get { return 0x03; } }
public override bool IsHierarchic { get { return true; } }
public override bool CanCreate { get { return false; } }
public PakOpener ()
{
Extensions = new string[] { "pak" };
Signatures = new uint[] { 2, 3 };
}
public override ArcFile TryOpen (ArcView file)
{
int version = file.View.ReadInt32 (0);
List<Entry> dir = null;
if (2 == version)
dir = OpenPakV2 (file);
else if (3 == version)
dir = OpenPakV3 (file);
if (null == dir)
return null;
return new NitroPak (file, this, dir, version);
}
private List<Entry> OpenPakV2 (ArcView file)
{
int count = file.View.ReadInt32 (4);
if (!IsSaneCount (count))
return null;
int unpacked_size = file.View.ReadInt32 (8);
uint packed_size = file.View.ReadUInt32 (0xC);
using (var input = file.CreateStream (0x114, packed_size))
using (var header_stream = new ZLibStream (input, CompressionMode.Decompress))
using (var header = new BinaryReader (header_stream, Encoding.ASCII, true))
{
long base_offset = 0x114 + packed_size;
var name_buf = new byte[0x40];
var dir = new List<Entry> (count);
for (int i = 0; i < count; ++i)
{
int name_length = header.ReadInt32();
if (name_length <= 0)
return null;
if (name_length > name_buf.Length)
name_buf = new byte[name_length];
if (name_length != header.Read (name_buf, 0, name_length))
return null;
var name = Encodings.cp932.GetString (name_buf, 0, name_length);
var entry = FormatCatalog.Instance.Create<PackedEntry> (name);
entry.Offset = base_offset + header.ReadUInt32();
entry.UnpackedSize = header.ReadUInt32();
entry.Size = header.ReadUInt32();
entry.IsPacked = header.ReadInt32() != 0;
uint psize = header.ReadUInt32();
if (entry.IsPacked)
entry.Size = psize;
if (!entry.CheckPlacement (file.MaxOffset))
return null;
dir.Add (entry);
}
return dir;
}
}
private List<Entry> OpenPakV3 (ArcView file)
{
if (0x110 > file.View.Reserve (4, 0x110))
return null;
uint size_xor = file.View.ReadUInt32 (0x104);
if (0x64 != size_xor)
return null;
byte[] name_buf = file.View.ReadBytes (4, 0x100);
int name_len = 0;
for (int i = 0; i < name_buf.Length; ++i)
{
if (0 == name_buf[i])
break;
if (name_buf[i] >= 0x80 || name_buf[i] < 0x20)
return null;
++name_len;
}
if (0 == name_len || name_len > 0x10)
return null;
uint header_key = GetKey (name_buf, name_len);
uint unpacked = file.View.ReadUInt32 (0x108) ^ header_key;
int count = (int)(file.View.ReadUInt32 (0x10c) ^ header_key);
if (!IsSaneCount (count))
return null;
var dir = new List<Entry> (count);
uint header_size = file.View.ReadUInt32 (0x110) ^ size_xor;
long base_offset = 0x114 + header_size;
using (var input = file.CreateStream (0x114, header_size))
using (var header_stream = new ZLibStream (input, CompressionMode.Decompress))
using (var header = new BinaryReader (header_stream, Encoding.ASCII, true))
{
for (int i = 0; i < count; ++i)
{
name_len = header.ReadInt32();
if (name_len <= 0 || name_len > name_buf.Length)
return null;
if (name_len != header.Read (name_buf, 0, name_len))
return null;
uint key = GetKey (name_buf, name_len);
uint offset = header.ReadUInt32() ^ key;
uint size = header.ReadUInt32() ^ key;
uint val1 = header.ReadUInt32() ^ key;
uint val2 = header.ReadUInt32() ^ key;
uint val3 = header.ReadUInt32() ^ key;
var entry = new PakEntry {
Name = Encodings.cp932.GetString (name_buf, 0, name_len),
Offset = base_offset+offset,
Size = size,
Key = key,
};
if (!entry.CheckPlacement (file.MaxOffset))
return null;
entry.Type = FormatCatalog.Instance.GetTypeFromName (entry.Name);
dir.Add (entry);
}
return dir;
}
}
static uint GetKey (byte[] name, int length)
{
int key = 0;
for (int i = 0; i < length; ++i)
{
key *= 0x89;
key += (sbyte)name[i];
}
return (uint)key;
}
public override Stream OpenEntry (ArcFile arc, Entry entry)
{
var pak_entry = entry as PakEntry;
if (pak_entry != null)
return OpenV3Entry (arc, pak_entry);
var packed_entry = entry as PackedEntry;
if (packed_entry != null && packed_entry.IsPacked)
return UnpackV2Entry (arc, packed_entry);
return arc.File.CreateStream (entry.Offset, entry.Size);
}
private Stream UnpackV2Entry (ArcFile arc, PackedEntry entry)
{
var input = arc.File.CreateStream (entry.Offset, entry.Size);
try
{
return new ZLibStream (input, CompressionMode.Decompress);
}
catch
{
input.Dispose();
throw;
}
}
private Stream OpenV3Entry (ArcFile arc, PakEntry entry)
{
uint enc_size = Math.Min (entry.Size, 0x10u);
if (0 == enc_size)
return Stream.Null;
var buf = arc.File.View.ReadBytes (entry.Offset, enc_size);
uint key = entry.Key;
for (int i = 0; i < buf.Length; ++i)
{
buf[i] ^= (byte)key;
key = Binary.RotR (key, 8);
}
if (enc_size == entry.Size)
return new MemoryStream (buf, false);
return new PrefixStream (buf, arc.File.CreateStream (entry.Offset+enc_size, entry.Size-enc_size));
}
}
}