mirror of
https://github.com/crskycode/GARbro.git
synced 2024-10-23 23:58:17 +08:00
349 lines
13 KiB
C#
349 lines
13 KiB
C#
//! \file ArcDRS.cs
|
|
//! \date Thu Aug 21 06:11:09 2014
|
|
//! \brief Digital Romance System archive 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.Linq;
|
|
using System.Text;
|
|
using System.Collections.Generic;
|
|
using System.ComponentModel.Composition;
|
|
using GameRes.Utility;
|
|
using GameRes.Formats.Strings;
|
|
using GameRes.Formats.Properties;
|
|
|
|
namespace GameRes.Formats.Ikura
|
|
{
|
|
[Export(typeof(ArchiveFormat))]
|
|
public class DrsOpener : ArchiveFormat
|
|
{
|
|
public override string Tag { get { return "DRS"; } }
|
|
public override string Description { get { return "Digital Romance System resource archive"; } }
|
|
public override uint Signature { get { return 0; } }
|
|
public override bool IsHierarchic { get { return false; } }
|
|
public override bool CanCreate { get { return false; } }
|
|
|
|
public DrsOpener ()
|
|
{
|
|
Extensions = Enumerable.Empty<string>(); // DRS archives have no extensions
|
|
}
|
|
|
|
public override ArcFile TryOpen (ArcView file)
|
|
{
|
|
if (file.MaxOffset > uint.MaxValue)
|
|
return null;
|
|
int dir_size = file.View.ReadUInt16 (0);
|
|
if (dir_size < 0x20 || 0 != (dir_size & 0xf) || dir_size + 2 >= file.MaxOffset)
|
|
return null;
|
|
byte first = file.View.ReadByte (2);
|
|
if (0 == first)
|
|
return null;
|
|
file.View.Reserve (0, (uint)dir_size + 2);
|
|
int dir_offset = 2;
|
|
|
|
uint next_offset = file.View.ReadUInt32 (dir_offset+12);
|
|
if (next_offset > file.MaxOffset || next_offset < dir_size+2)
|
|
return null;
|
|
var encoding = Encodings.cp932.WithFatalFallback();
|
|
byte[] name_raw = new byte[12];
|
|
|
|
int count = dir_size / 0x10 - 1;
|
|
var dir = new List<Entry> (count);
|
|
for (int i = 0; i < count; ++i)
|
|
{
|
|
file.View.Read (dir_offset, name_raw, 0, 12);
|
|
int name_length = name_raw.Length;
|
|
while (name_length > 0 && 0 == name_raw[name_length-1])
|
|
--name_length;
|
|
if (0 == name_length)
|
|
return null;
|
|
uint offset = next_offset;
|
|
dir_offset += 0x10;
|
|
next_offset = file.View.ReadUInt32 (dir_offset+12);
|
|
if (next_offset > file.MaxOffset || next_offset < offset)
|
|
return null;
|
|
string name = encoding.GetString (name_raw, 0, name_length).ToLowerInvariant();
|
|
var entry = FormatCatalog.Instance.Create<Entry> (name);
|
|
entry.Offset = offset;
|
|
entry.Size = next_offset - offset;
|
|
dir.Add (entry);
|
|
}
|
|
return new ArcFile (file, this, dir);
|
|
}
|
|
}
|
|
|
|
[Serializable]
|
|
public class IsfScheme : ResourceScheme
|
|
{
|
|
public Dictionary<string, byte[]> KnownSecrets;
|
|
}
|
|
|
|
internal class IsfOptions : ResourceOptions
|
|
{
|
|
public byte[] Secret;
|
|
}
|
|
|
|
internal class IsfArchive : ArcFile
|
|
{
|
|
public byte[] Secret;
|
|
|
|
public IsfArchive (ArcView arc, ArchiveFormat impl, ICollection<Entry> dir, byte[] secret = null)
|
|
: base (arc, impl, dir)
|
|
{
|
|
Secret = secret;
|
|
}
|
|
}
|
|
|
|
[Export(typeof(ArchiveFormat))]
|
|
public class MpxOpener : ArchiveFormat
|
|
{
|
|
public override string Tag { get { return "IKURA/GDL"; } }
|
|
public override string Description { get { return "IKURA GDL resource archive"; } }
|
|
public override uint Signature { get { return 0x4d324d53; } } // 'SM2M'
|
|
public override bool IsHierarchic { get { return false; } }
|
|
public override bool CanCreate { get { return false; } }
|
|
|
|
public MpxOpener ()
|
|
{
|
|
Extensions = Enumerable.Empty<string>(); // DRS archives have no extensions
|
|
}
|
|
|
|
public override ArcFile TryOpen (ArcView file)
|
|
{
|
|
if (!file.View.AsciiEqual (4, "PX10") || file.MaxOffset > uint.MaxValue)
|
|
return null;
|
|
int count = file.View.ReadInt32 (8);
|
|
if (count <= 0 || count > 0xfffff)
|
|
return null;
|
|
uint index_size = file.View.ReadUInt32 (12);
|
|
if (index_size > file.MaxOffset)
|
|
return null;
|
|
var encoding = Encodings.cp932.WithFatalFallback();
|
|
byte[] name_raw = new byte[12];
|
|
|
|
long dir_offset = 0x20;
|
|
var dir = new List<Entry> (count);
|
|
bool has_scripts = false;
|
|
for (int i = 0; i < count; ++i)
|
|
{
|
|
file.View.Read (dir_offset, name_raw, 0, 12);
|
|
int name_length = name_raw.Length;
|
|
while (name_length > 0 && 0 == name_raw[name_length-1])
|
|
--name_length;
|
|
if (0 == name_length)
|
|
return null;
|
|
string name = encoding.GetString (name_raw, 0, name_length).ToLowerInvariant();
|
|
Entry entry;
|
|
if (name.EndsWith (".isf") || name.EndsWith (".snr"))
|
|
{
|
|
entry = new Entry { Name = name, Type = "script" };
|
|
has_scripts = true;
|
|
}
|
|
else
|
|
entry = FormatCatalog.Instance.Create<Entry> (name);
|
|
entry.Offset = file.View.ReadUInt32 (dir_offset+12);
|
|
entry.Size = file.View.ReadUInt32 (dir_offset+16);
|
|
if (!entry.CheckPlacement (file.MaxOffset))
|
|
return null;
|
|
dir.Add (entry);
|
|
dir_offset += 0x14;
|
|
}
|
|
if (has_scripts)
|
|
return new IsfArchive (file, this, dir);
|
|
else
|
|
return new ArcFile (file, this, dir);
|
|
}
|
|
|
|
public override Stream OpenEntry (ArcFile arc, Entry entry)
|
|
{
|
|
var isf = arc as IsfArchive;
|
|
if (null == isf || entry.Type != "script" || entry.Size <= 0x10)
|
|
return arc.File.CreateStream (entry.Offset, entry.Size);
|
|
bool encoded = arc.File.View.AsciiEqual (entry.Offset+entry.Size-0x10, "SECRETFILTER100a");
|
|
uint entry_size = entry.Size;
|
|
if (encoded)
|
|
{
|
|
entry_size -= 0x10;
|
|
if (null == isf.Secret)
|
|
isf.Secret = QuerySecret();
|
|
if (null == isf.Secret || 0 == isf.Secret.Length)
|
|
return arc.File.CreateStream (entry.Offset, entry.Size);
|
|
}
|
|
var data = new byte[entry_size];
|
|
arc.File.View.Read (entry.Offset, data, 0, entry_size);
|
|
if (encoded)
|
|
{
|
|
var decoder = new IsfDecoder (isf.Secret);
|
|
decoder.Decode (data);
|
|
}
|
|
int signature = LittleEndian.ToUInt16 (data, 4);
|
|
if (0x9795 == signature)
|
|
{
|
|
ApplyTransformation (data, 8, x => x >> 2 | x << 6);
|
|
}
|
|
else if (0xd197 == signature)
|
|
{
|
|
ApplyTransformation (data, 8, x => ~x);
|
|
}
|
|
else if (0xce89 == signature && 0 != data[6])
|
|
{
|
|
byte key = data[6];
|
|
ApplyTransformation (data, 8, x => x ^ key);
|
|
}
|
|
return new MemoryStream (data);
|
|
}
|
|
|
|
public override ResourceOptions GetDefaultOptions ()
|
|
{
|
|
return new IsfOptions {
|
|
Secret = GetSecret (Settings.Default.ISFScheme) ?? new byte[0]
|
|
};
|
|
}
|
|
|
|
public override object GetAccessWidget ()
|
|
{
|
|
return new GUI.WidgetISF();
|
|
}
|
|
|
|
private byte[] QuerySecret ()
|
|
{
|
|
var options = Query<IsfOptions> (arcStrings.ArcEncryptedNotice);
|
|
return options.Secret;
|
|
}
|
|
|
|
private static byte[] GetSecret (string scheme)
|
|
{
|
|
byte[] secret;
|
|
if (KnownSecrets.TryGetValue (scheme, out secret))
|
|
return secret;
|
|
return null;
|
|
}
|
|
|
|
private static void ApplyTransformation (byte[] data, int offset, Func<byte, int> method)
|
|
{
|
|
for (int i = offset; i < data.Length; ++i)
|
|
data[i] = (byte)method (data[i]);
|
|
}
|
|
|
|
public static Dictionary<string, byte[]> KnownSecrets = new Dictionary<string, byte[]>();
|
|
|
|
public override ResourceScheme Scheme
|
|
{
|
|
get { return new IsfScheme { KnownSecrets = KnownSecrets }; }
|
|
set { KnownSecrets = ((IsfScheme)value).KnownSecrets; }
|
|
}
|
|
}
|
|
|
|
internal class IsfDecoder
|
|
{
|
|
byte[] m_secret;
|
|
|
|
public IsfDecoder (byte[] secret)
|
|
{
|
|
m_secret = secret;
|
|
}
|
|
|
|
public void Decode (byte[] data)
|
|
{
|
|
var key_string = CreateKeyString();
|
|
int n = 0;
|
|
for (int i = 0; i < data.Length; )
|
|
{
|
|
DecodePrepare (n++, key_string);
|
|
for (int j = 0; j < key_string.Length && i < data.Length; )
|
|
{
|
|
data[i++] ^= key_string[j++];
|
|
}
|
|
}
|
|
}
|
|
|
|
private byte[] CreateKeyString ()
|
|
{
|
|
byte[] len_str = new byte[2];
|
|
for (int i = 0; i < 2; i++)
|
|
len_str[i] = EncodeHex ((byte)(Chr2HexCode (m_secret[0x500 + i]) - Chr2HexCode (m_secret[0x100 + i])));
|
|
|
|
byte[] key_string = new byte[Str2Hex (len_str)];
|
|
for (int i = 0; i < key_string.Length; i++)
|
|
key_string[i] = EncodeHex ((byte)(Chr2HexCode (m_secret[0x510 + i]) - Chr2HexCode (m_secret[0x110 + i])));
|
|
return key_string;
|
|
}
|
|
|
|
private void DecodePrepare (int index, byte[] key_string)
|
|
{
|
|
int p = (index & 0x3f) * 16; // index within SecretTable
|
|
for (int i = 0; i < key_string.Length; i++)
|
|
key_string[i] = EncodeHex ((byte)(Chr2HexCode (key_string[i]) + Chr2HexCode (m_secret[p+i])));
|
|
}
|
|
|
|
private static byte EncodeHex (byte symbol)
|
|
{
|
|
if (symbol < 0x80)
|
|
return HexEncodeMap[symbol % 36];
|
|
symbol = (byte)(-(sbyte)symbol % 36);
|
|
if (0 == symbol)
|
|
return HexEncodeMap[0];
|
|
return HexEncodeMap[36 - symbol];
|
|
}
|
|
|
|
private static byte Chr2HexCode (byte chr)
|
|
{
|
|
return HexTable[Chr2Hex (chr)];
|
|
}
|
|
|
|
private static byte Chr2Hex (byte chr)
|
|
{
|
|
byte code;
|
|
if (chr >= '0' && chr <= '9')
|
|
code = (byte)(chr - '0');
|
|
else if (chr >= 'a' && chr <= 'z')
|
|
code = (byte)(chr - 'a' + 10);
|
|
else if (chr >= 'A' && chr <= 'Z')
|
|
code = (byte)(chr - 'A' + 10);
|
|
else
|
|
code = 0;
|
|
return code;
|
|
}
|
|
|
|
private static int Str2Hex (byte[] shex)
|
|
{
|
|
int idec = 0;
|
|
for (int i = 0; i < shex.Length; ++i)
|
|
{
|
|
int mid = Chr2Hex (shex[i]);
|
|
mid <<= ((shex.Length - i - 1) << 2);
|
|
idec |= mid;
|
|
}
|
|
return idec;
|
|
}
|
|
|
|
static readonly byte[] HexEncodeMap = Encoding.ASCII.GetBytes("G5FXIL094MPRKWCJ3OEBVA7HQ2SU8Y6TZ1ND");
|
|
static readonly byte[] HexTable = new byte[] {
|
|
0x06, 0x21, 0x19, 0x10, 0x08, 0x01, 0x1E, 0x16, 0x1C, 0x07, 0x15, 0x13, 0x0E, 0x23, 0x12, 0x02,
|
|
0x00, 0x17, 0x04, 0x0F, 0x0C, 0x05, 0x09, 0x22, 0x11, 0x0A, 0x18, 0x0B, 0x1A, 0x1F, 0x1B, 0x14,
|
|
0x0D, 0x03, 0x1D, 0x20,
|
|
};
|
|
}
|
|
}
|