GARbro-mirror/ArcFormats/ArcYPF.cs

230 lines
8.9 KiB
C#

//! \file ArcYPF.cs
//! \date Mon Jul 14 14:40:06 2014
//! \brief YPF resource format implementation.
//
// Copyright (C) 2014 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.IO;
using System.Text;
using System.Collections.Generic;
using System.ComponentModel.Composition;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using ZLibNet;
using GameRes.Formats.Strings;
using GameRes.Formats.Properties;
namespace GameRes.Formats
{
public class YpfOptions : ResourceOptions
{
public uint Key { get; set; }
}
[Export(typeof(ArchiveFormat))]
public class YpfOpener : ArchiveFormat
{
public override string Tag { get { return "YPF"; } }
public override string Description { get { return arcStrings.YPFDescription; } }
public override uint Signature { get { return 0x00465059; } }
public override bool IsHierarchic { get { return true; } }
private const uint DefaultKey = 0xffffffff;
public override ArcFile TryOpen (ArcView file)
{
uint count = file.View.ReadUInt32 (8);
uint dir_size = file.View.ReadUInt32 (12);
if (dir_size < count * 0x17)
return null;
if (0 != ((count - 1) >> 20))
return null;
// Reserve (0x20, dir_size)
var parser = new Parser (file, count, dir_size);
uint key = QueryEncryptionKey();
var dir = parser.ScanDir (key);
if (0 == dir.Count)
return null;
return new ArcFile (file, this, dir);
}
public override Stream OpenEntry (ArcFile arc, Entry entry)
{
var input = arc.File.CreateStream (entry.Offset, entry.Size);
var packed_entry = entry as PackedEntry;
if (null == packed_entry || !packed_entry.IsPacked)
return input;
else
return new ZLibStream (input, CompressionMode.Decompress);
}
public override ResourceOptions GetDefaultOptions ()
{
return new YpfOptions { Key = Settings.Default.YPFKey };
}
public override ResourceOptions GetOptions (object w)
{
var widget = w as GUI.WidgetYPF;
if (null != widget)
{
uint last_key = widget.GetKey() ?? DefaultKey;
Settings.Default.YPFKey = last_key;
return new YpfOptions { Key = last_key };
}
return this.GetDefaultOptions();
}
public override object GetAccessWidget ()
{
return new GUI.WidgetYPF();
}
uint QueryEncryptionKey ()
{
var args = new ParametersRequestEventArgs
{
Notice = arcStrings.YPFNotice,
};
FormatCatalog.Instance.InvokeParametersRequest (this, args);
if (!args.InputResult)
throw new OperationCanceledException();
return GetOptions<YpfOptions> (args.Options).Key;
}
private class Parser
{
ArcView m_file;
uint m_version;
uint m_count;
uint m_dir_size;
public Parser (ArcView file, uint count, uint dir_size)
{
m_file = file;
m_count = count;
m_dir_size = dir_size;
m_version = file.View.ReadUInt32 (4);
}
// 4-name_checksum, 1-name_count, *-name, 1-file_type
// 1-pack_flag, 4-size, 4-packed_size, 4-offset, 4-packed_adler32
public List<Entry> ScanDir (uint key)
{
uint dir_offset = 0x20;
uint dir_remaining = m_dir_size;
var dir = new List<Entry> ((int)m_count);
for (uint num = 0; num < m_count; ++num)
{
if (dir_remaining < 0x17)
break;
dir_remaining -= 0x17;
uint name_size = Decrypt ((byte)(m_file.View.ReadByte (dir_offset+4) ^ 0xff));
if (name_size > dir_remaining)
break;
dir_remaining -= name_size;
dir_offset += 5;
if (0 == name_size)
break;
if (0xffffffff == key)
{
if (name_size < 4)
break;
// assume filename contains '.' and 3-characters extension.
key = (uint)(m_file.View.ReadByte (dir_offset+name_size-4) ^ 0x2e);
}
byte[] raw_name = new byte[name_size];
for (int i = 0; i < name_size; ++i)
{
raw_name[i] = (byte)(m_file.View.ReadByte (dir_offset) ^ key);
++dir_offset;
}
string name = Encodings.cp932.GetString (raw_name);
// 0x0F7: 0-ybn, 1-bmp, 2-png, 3-jpg, 4-gif, 5-avi, 6-wav, 7-ogg, 8-psd
// 0x122, 0x12C, 0x196: 0-ybn, 1-bmp, 2-png, 3-jpg, 4-gif, 5-wav, 6-ogg, 7-psd
int type_id = m_file.View.ReadByte (dir_offset);
string type = "";
switch (type_id)
{
case 0:
type = "script";
break;
case 1: case 2: case 3: case 4:
type = "image";
break;
case 5:
type = 0xf7 == m_version ? "video" : "audio";
break;
case 6:
case 7:
type = "audio";
break;
}
var entry = new PackedEntry { Name = name, Type = type };
entry.IsPacked = 1 == m_file.View.ReadByte (dir_offset+1);
entry.UnpackedSize = m_file.View.ReadUInt32 (dir_offset+2);
entry.Size = m_file.View.ReadUInt32 (dir_offset+6);
entry.Offset = m_file.View.ReadUInt32 (dir_offset+10);
if (entry.CheckPlacement (m_file.MaxOffset))
dir.Add (entry);
dir_offset += 0x12;
}
return dir;
}
static readonly byte[] s_crypt_table = {
0x03,0x48,0x06,0x35, // 0x122, 0x196
0x0C,0x10,0x11,0x19,0x1C,0x1E, // 0x0F7
0x09,0x0B,0x0D,0x13,0x15,0x1B, // 0x12C
0x20,0x23,0x26,0x29,
0x2C,0x2F,0x2E,0x32,
};
// 0xFF 0x0F7 "Four-Leaf" adler32
// 0x34 0x122 "Neko Koi!" crc32
// 0x28 0x12C "Suzukaze no Melt" (no recovery - 00 00 00 00)
// 0xFF 0x196 "Mamono Musume-tachi to no Rakuen ~Slime & Scylla~"
public uint Decrypt (byte value)
{
int pos = s_crypt_table.Length - 0x14;
if (m_version >= 0x100)
{
pos -= 4;
if (m_version >= 0x12c && m_version < 0x196)
pos += 10;
}
pos = Array.FindIndex (s_crypt_table, pos, x => x == value);
if (-1 == pos)
return value;
if (0 != (pos & 1))
return s_crypt_table[pos-1];
else
return s_crypt_table[pos+1];
}
}
}
}