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implemented ACTGS archives format.
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morkt
parent
382b257532
commit
2938fc111f
165
ArcFormats/Actgs/ArcDAT.cs
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165
ArcFormats/Actgs/ArcDAT.cs
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//! \file ArcDAT.cs
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//! \date Tue Nov 03 07:05:36 2015
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//! \brief ACTGS engine resource archive.
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//
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// Copyright (C) 2015 by morkt
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to
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// deal in the Software without restriction, including without limitation the
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// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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// sell copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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// IN THE SOFTWARE.
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//
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using System;
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using System.Collections.Generic;
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using System.ComponentModel.Composition;
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using System.IO;
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using System.Linq;
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using GameRes.Utility;
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using GameRes.Compression;
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namespace GameRes.Formats.Actgs
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{
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[Serializable]
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public class ActressScheme : ResourceScheme
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{
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public byte[][] KnownKeys;
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}
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internal class ActressArchive : ArcFile
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{
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public readonly byte[] Key;
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public ActressArchive (ArcView arc, ArchiveFormat impl, ICollection<Entry> dir, byte[] key)
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: base (arc, impl, dir)
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{
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Key = key;
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}
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}
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[Export(typeof(ArchiveFormat))]
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public class DatOpener : ArchiveFormat
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{
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public override string Tag { get { return "DAT/ACTGS"; } }
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public override string Description { get { return "ACTGS engine resource archive"; } }
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public override uint Signature { get { return 0; } }
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public override bool IsHierarchic { get { return false; } }
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public override bool CanCreate { get { return false; } }
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public DatOpener ()
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{
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Extensions = new string[] { "dat" };
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}
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public static byte[][] KnownKeys = { };
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public override ArcFile TryOpen (ArcView file)
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{
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int count = file.View.ReadInt32 (0);
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if (!IsSaneCount (count))
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return null;
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if (0 != (file.View.ReadInt32 (4) | file.View.ReadInt32 (8) | file.View.ReadInt32 (12)))
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return null;
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const int entry_size = 0x20;
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var index = new byte[count * entry_size];
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if (index.Length != file.View.Read (0x10, index, 0, (uint)index.Length))
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return null;
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uint first_offset = 0x10u + (uint)index.Length;
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uint actual_offset = LittleEndian.ToUInt32 (index, 0);
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byte[] key = null;
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if (actual_offset != first_offset)
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{
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key = FindKey (first_offset, actual_offset);
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if (null == key)
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return null;
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Decrypt (index, 0, index.Length, key);
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}
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int index_offset = 0;
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var dir = new List<Entry> (count);
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for (int i = 0; i < count; ++i)
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{
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var name = Binary.GetCString (index, index_offset+8, 0x18);
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if (0 == name.Length)
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return null;
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var entry = FormatCatalog.Instance.Create<Entry> (name);
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entry.Offset = LittleEndian.ToUInt32 (index, index_offset);
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entry.Size = LittleEndian.ToUInt32 (index, index_offset+4);
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if (!entry.CheckPlacement (file.MaxOffset))
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return null;
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dir.Add (entry);
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index_offset += 0x20;
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}
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if (null == key)
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return new ArcFile (file, this, dir);
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else
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return new ActressArchive (file, this, dir, key);
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}
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public override Stream OpenEntry (ArcFile arc, Entry entry)
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{
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var actarc = arc as ActressArchive;
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if (null == actarc || null == actarc.Key)
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return base.OpenEntry (arc, entry);
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if (entry.Name.EndsWith (".scr", StringComparison.InvariantCultureIgnoreCase))
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{
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if ('X' != arc.File.View.ReadByte (entry.Offset))
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return base.OpenEntry (arc, entry);
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var data = new byte[entry.Size];
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arc.File.View.Read (entry.Offset, data, 0, entry.Size);
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Decrypt (data, 1, data.Length-1, actarc.Key);
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data[0] = (byte)'N';
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return new MemoryStream (data);
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}
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if (arc.File.View.AsciiEqual (entry.Offset, "PAK "))
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{
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uint packed_size = arc.File.View.ReadUInt32 (entry.Offset+4);
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var input = arc.File.CreateStream (entry.Offset+12, packed_size);
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return new LzssStream (input);
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}
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uint length = Math.Min (entry.Size, 0x20u);
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var header = new byte[length];
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arc.File.View.Read (entry.Offset, header, 0, length);
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Decrypt (header, 0, (int)length, actarc.Key);
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if (entry.Size <= 0x20)
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return new MemoryStream (header);
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var rest = arc.File.CreateStream (entry.Offset+0x20, entry.Size-0x20);
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return new PrefixStream (header, rest);
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}
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byte[] FindKey (uint first_offset, uint actual_offset)
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{
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var pattern = new byte[4];
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LittleEndian.Pack (first_offset ^ actual_offset, pattern, 0);
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return Array.Find (KnownKeys, k => k.Take (4).SequenceEqual (pattern));
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}
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static void Decrypt (byte[] data, int index, int length, byte[] key)
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{
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for (int i = 0; i < length; ++i)
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{
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data[index+i] ^= key[i % key.Length];
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}
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}
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public override ResourceScheme Scheme
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{
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get { return new ActressScheme { KnownKeys = KnownKeys }; }
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set { KnownKeys = ((ActressScheme)value).KnownKeys; }
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}
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}
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}
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@ -62,6 +62,7 @@
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<Reference Include="WindowsBase" />
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</ItemGroup>
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<ItemGroup>
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<Compile Include="Actgs\ArcDAT.cs" />
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<Compile Include="Amaterasu\ImageGRP.cs" />
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<Compile Include="ArcDX.cs" />
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<Compile Include="ArcMiris.cs" />
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@ -201,7 +201,9 @@ Nikutai Ten'i<br/>
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<tr class="odd"><td>*.igf</td><td><tt>ZEUS</tt></td><td>No</td></tr>
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<tr><td>*.dat<br/>*.arc</td><td>-<br/><tt>M2TYPE</tt></td><td>No</td><td rowspan="2">FFA System/G-SYS</td><td rowspan="2">
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Dokusen Kango<br/>
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Hensai Keikaku<br/>
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Inran OL Sawatari Tokiko<br/>
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Kunoichi Kikyou ~Gensou Kannou Emaki~<br/>
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Momo x Momi<br/>
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Onsen Kankou Yukemuri Chijou<br/>
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</td></tr>
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@ -259,6 +261,7 @@ Rikorisu ~Lycoris Radiata~<br/>
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Aneimo 2 ~Second Stage~<br/>
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Momichupa Teacher!<br/>
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Natsu no Owari no Nirvana<br/>
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Patissier na Nyanko<br/>
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Prism Heart<br/>
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Trouble @ Spiral!<br/>
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</tr>
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@ -455,9 +458,13 @@ Moshimo Ashita ga Harenaraba<br/>
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</td></tr>
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<tr class="odd"><td>*.pga</td><td><tt>PGAPGAH</tt></td><td>Yes</td></tr>
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<tr class="odd"><td>*.chr</td><td><tt>char</tt></td><td>No</td></tr>
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<tr><td>*.gyu</td><td><tt>GYU\x1a</tt></td><td>ExHIBIT</td><td>
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<tr><td>*.gyu</td><td><tt>GYU\x1a</tt></td><td>No</td><td>ExHIBIT</td><td>
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Fuyu no Rondo<br/>
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</td></tr>
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<tr class="odd"><td>*.dat</td><td>-</td><td>No</td><td>ACTGS</td><td>
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Oreiro Ganbou<br/>
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Tadashiki Himehajime<br/>
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</td></tr>
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</table>
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<p><a name="note-1" class="footnote">1</a> Non-encrypted only</p>
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</body>
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