mirror of
https://github.com/crskycode/GARbro.git
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499 lines
18 KiB
C#
499 lines
18 KiB
C#
//! \file ArcLIB.cs
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//! \date Thu Jun 25 06:46:51 2015
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//! \brief Malie System archive implementation.
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//
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// Copyright (C) 2015-2016 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 System.Text;
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using GameRes.Encryption;
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using GameRes.Utility;
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namespace GameRes.Formats.Malie
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{
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[Export(typeof(ArchiveFormat))]
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public class LibOpener : ArchiveFormat
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{
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public override string Tag { get { return "LIB"; } }
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public override string Description { get { return "Malie engine resource archive"; } }
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public override uint Signature { get { return 0x0042494C; } } // 'LIB'
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public override bool IsHierarchic { get { return true; } }
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public override bool CanCreate { get { return false; } }
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public override ArcFile TryOpen (ArcView file)
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{
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var reader = new Reader (file);
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if (reader.ReadIndex ("", 0, (uint)file.MaxOffset))
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return new ArcFile (file, this, reader.Dir);
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else
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return null;
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}
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internal class Reader
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{
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ArcView.Frame m_view;
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List<Entry> m_dir = new List<Entry>();
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public List<Entry> Dir { get { return m_dir; } }
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public Reader (ArcView file)
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{
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m_view = file.View;
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}
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public bool ReadIndex (string root, long base_offset, uint size)
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{
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uint signature = m_view.ReadUInt32 (base_offset);
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if (0x0042494C != signature)
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return false;
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int count = m_view.ReadInt16 (base_offset + 8);
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if (count <= 0)
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return false;
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long index_offset = base_offset + 0x10;
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uint index_size = (uint)(0x30 * count);
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if (index_size > size)
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return false;
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if (index_size > m_view.Reserve (index_offset, index_size))
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return false;
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long data_offset = index_offset + index_size;
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if (m_dir.Capacity < m_dir.Count + count)
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m_dir.Capacity = m_dir.Count + count;
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for (int i = 0; i < count; ++i)
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{
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string name = m_view.ReadString (index_offset, 0x24);
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uint entry_size = m_view.ReadUInt32 (index_offset+0x24);
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long offset = base_offset + m_view.ReadUInt32 (index_offset+0x28);
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index_offset += 0x30;
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string ext = Path.GetExtension (name);
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name = Path.Combine (root, name);
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if (string.IsNullOrEmpty (ext) && ReadIndex (name, offset, entry_size))
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{
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continue;
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}
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if (offset < data_offset || offset + entry_size > base_offset + size)
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return false;
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var entry = FormatCatalog.Instance.Create<Entry> (name);
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entry.Offset = offset;
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entry.Size = entry_size;
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m_dir.Add (entry);
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}
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return true;
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}
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}
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}
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public class MalieArchive : ArcFile
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{
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public readonly Camellia Encryption;
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public MalieArchive (ArcView file, ArchiveFormat format, ICollection<Entry> dir, Camellia encryption)
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: base (file, format, dir)
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{
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Encryption = encryption;
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}
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}
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[Serializable]
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public class LibScheme : ResourceScheme
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{
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public Dictionary<string, uint[]> KnownKeys;
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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 "LIBP"; } }
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public override string Description { get { return "Malie engine encrypted archive"; } }
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public override uint Signature { get { return 0; } }
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public override bool IsHierarchic { get { return true; } }
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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[] { "lib", "dat" };
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}
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public override ArcFile TryOpen (ArcView file)
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{
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if (file.MaxOffset <= 0x10)
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return null;
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var header = new byte[0x10];
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foreach (var key in KnownKeys.Values)
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{
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var encryption = new Camellia (key);
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ReadEncrypted (file.View, encryption, 0, header, 0, 0x10);
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LibIndexReader reader;
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if (Binary.AsciiEqual (header, 0, "LIBP"))
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reader = new LibPReader (file, encryption, header);
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else if (Binary.AsciiEqual (header, 0, "LIBU"))
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reader = new LibUReader (file, encryption, header);
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else
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continue;
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using (reader)
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{
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var dir = reader.ReadIndex();
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if (dir != null)
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return new MalieArchive (file, this, dir, encryption);
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}
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}
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return null;
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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 march = arc as MalieArchive;
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if (null == march)
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return arc.File.CreateStream (entry.Offset, entry.Size);
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var input = new EncryptedStream (march.File, march.Encryption);
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return new StreamRegion (input, entry.Offset, entry.Size);
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}
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internal abstract class LibIndexReader : IDisposable
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{
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protected ArcView.Frame m_view;
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protected readonly long m_max_offset;
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protected Camellia m_enc;
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protected List<Entry> m_dir = new List<Entry>();
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protected byte[] m_header;
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public List<Entry> Dir { get { return m_dir; } }
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protected LibIndexReader (ArcView file, Camellia encryption, byte[] header)
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{
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m_view = file.View;
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m_max_offset = file.MaxOffset;
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m_enc = encryption;
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m_header = header;
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}
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public abstract List<Entry> ReadIndex ();
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#region IDisposable Members
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public void Dispose ()
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{
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Dispose (true);
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GC.SuppressFinalize (this);
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}
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protected virtual void Dispose (bool disposing)
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{
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}
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#endregion
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}
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internal class LibPReader : LibIndexReader
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{
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byte[] m_index;
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long m_base_offset;
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uint[] m_offset_table;
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public LibPReader (ArcView file, Camellia encryption, byte[] header) : base (file, encryption, header)
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{
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m_base_offset = 0;
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}
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public override List<Entry> ReadIndex ()
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{
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int count = LittleEndian.ToInt32 (m_header, 4);
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if (!IsSaneCount (count))
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return null;
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int offset_count = LittleEndian.ToInt32 (m_header, 8);
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m_index = new byte[0x20 * count];
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var offsets = new byte[4 * offset_count];
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m_base_offset += 0x10;
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if (m_index.Length != ReadEncrypted (m_view, m_enc, m_base_offset, m_index, 0, m_index.Length))
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return null;
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m_base_offset += m_index.Length;
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if (offsets.Length != ReadEncrypted (m_view, m_enc, m_base_offset, offsets, 0, offsets.Length))
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return null;
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m_offset_table = new uint[offset_count];
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Buffer.BlockCopy (offsets, 0, m_offset_table, 0, offsets.Length);
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m_base_offset += offsets.Length;
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m_base_offset = (m_base_offset + 0xFFF) & ~0xFFF;
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m_dir.Capacity = offset_count;
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ReadDir ("", 0, 1);
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return m_dir.Count > 0 ? m_dir : null;
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}
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private void ReadDir (string root, int entry_index, int count)
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{
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int current_offset = entry_index * 0x20;
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for (int i = 0; i < count; ++i)
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{
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string name = Binary.GetCString (m_index, current_offset, 0x14);
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int flags = LittleEndian.ToInt32 (m_index, current_offset+0x14);
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int offset = LittleEndian.ToInt32 (m_index, current_offset+0x18);
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uint size = LittleEndian.ToUInt32 (m_index, current_offset+0x1c);
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current_offset += 0x20;
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name = Path.Combine (root, name);
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if (0 == (flags & 0x10000))
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{
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if (offset > entry_index)
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ReadDir (name, (int)offset, (int)size);
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continue;
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}
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long entry_offset = m_base_offset + ((long)m_offset_table[offset] << 10);
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var entry = FormatCatalog.Instance.Create<Entry> (name);
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if (entry.CheckPlacement (m_max_offset))
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{
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entry.Offset = entry_offset;
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entry.Size = size;
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m_dir.Add (entry);
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}
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}
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}
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}
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internal class LibUReader : LibIndexReader
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{
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BinaryReader m_input;
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public LibUReader (ArcView file, Camellia encryption, byte[] header) : base (file, encryption, header)
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{
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var input = new EncryptedStream (file, encryption);
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m_input = new BinaryReader (input, Encoding.Unicode);
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}
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public override List<Entry> ReadIndex ()
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{
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return ReadDir ("", 0) ? m_dir : null;
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}
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bool ReadDir (string root, long base_offset)
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{
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m_input.BaseStream.Position = base_offset;
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if (0x5542494C != m_input.ReadUInt32()) // 'LIBU'
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return false;
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m_input.ReadInt32();
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int count = m_input.ReadInt32();
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if (!IsSaneCount (count))
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return false;
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if (m_dir.Capacity < m_dir.Count + count)
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m_dir.Capacity = m_dir.Count + count;
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long index_pos = base_offset + 0x10;
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for (int i = 0; i < count; ++i)
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{
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m_input.BaseStream.Position = index_pos;
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var name = ReadName();
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uint entry_size = m_input.ReadUInt32();
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long entry_offset = base_offset + m_input.ReadInt64();
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index_pos = m_input.BaseStream.Position;
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bool has_extension = -1 != name.IndexOf ('.');
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name = Path.Combine (root, name);
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if (!has_extension && ReadDir (name, entry_offset))
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continue;
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var entry = FormatCatalog.Instance.Create<Entry> (name);
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entry.Offset = entry_offset;
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entry.Size = entry_size;
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if (!entry.CheckPlacement (m_max_offset))
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return false;
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m_dir.Add (entry);
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}
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return true;
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}
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char[] m_name_buffer = new char[0x22];
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string ReadName ()
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{
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m_input.Read (m_name_buffer, 0, 0x22);
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int length = Array.IndexOf (m_name_buffer, '\0');
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if (-1 == length)
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length = m_name_buffer.Length;
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return new string (m_name_buffer, 0, length);
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}
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#region IDisposable methods
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bool m_disposed = false;
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protected override void Dispose (bool disposing)
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{
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if (!m_disposed)
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{
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if (disposing)
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m_input.Dispose();
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m_disposed = true;
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base.Dispose();
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}
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}
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#endregion
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}
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private static int ReadEncrypted (ArcView.Frame view, Camellia enc, long offset, byte[] buffer, int index, int length)
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{
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int offset_pad = (int)offset & 0xF;
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int aligned_len = (offset_pad + length + 0xF) & ~0xF;
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byte[] aligned_buf;
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int block = 0;
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if (aligned_len == length)
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{
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aligned_buf = buffer;
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block = index;
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}
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else
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{
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aligned_buf = new byte[aligned_len];
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}
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int read = view.Read (offset - offset_pad, aligned_buf, block, (uint)aligned_len);
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if (read < offset_pad)
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return 0;
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for (int block_count = aligned_len / 0x10; block_count > 0; --block_count)
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{
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enc.DecryptBlock (offset, aligned_buf, block);
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block += 0x10;
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offset += 0x10;
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}
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if (aligned_buf != buffer)
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Buffer.BlockCopy (aligned_buf, offset_pad, buffer, index, length);
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return Math.Min (length, read-offset_pad);
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}
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public static Dictionary<string, uint[]> KnownKeys = new Dictionary<string, uint[]>();
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public override ResourceScheme Scheme
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{
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get { return new LibScheme { KnownKeys = KnownKeys }; }
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set { KnownKeys = ((LibScheme)value).KnownKeys; }
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}
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}
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internal class EncryptedStream : Stream
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{
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ArcView.Frame m_view;
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Camellia m_enc;
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long m_max_offset;
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long m_position = 0;
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byte[] m_current_block = new byte[BlockLength];
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int m_current_block_length = 0;
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long m_current_block_position = 0;
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public const int BlockLength = 0x1000;
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public Camellia Encryption { get { return m_enc; } }
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public EncryptedStream (ArcView mmap, Camellia encryption)
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{
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m_view = mmap.CreateFrame();
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m_enc = encryption;
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m_max_offset = mmap.MaxOffset;
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}
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public override int Read (byte[] buf, int index, int count)
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{
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int total_read = 0;
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bool refill_buffer = !(m_position >= m_current_block_position && m_position < m_current_block_position + m_current_block_length);
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while (count > 0 && m_position < m_max_offset)
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{
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if (refill_buffer)
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{
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m_current_block_position = m_position & ~((long)BlockLength-1);
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FillBuffer();
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}
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int src_offset = (int)m_position & (BlockLength-1);
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int available = Math.Min (count, m_current_block_length - src_offset);
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Buffer.BlockCopy (m_current_block, src_offset, buf, index, available);
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m_position += available;
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total_read += available;
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index += available;
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count -= available;
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refill_buffer = true;
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}
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return total_read;
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}
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private void FillBuffer ()
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{
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m_current_block_length = m_view.Read (m_current_block_position, m_current_block, 0, (uint)BlockLength);
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for (int offset = 0; offset < m_current_block_length; offset += 0x10)
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{
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m_enc.DecryptBlock (m_current_block_position+offset, m_current_block, offset);
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}
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}
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#region IO.Stream methods
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public override bool CanRead { get { return !m_disposed; } }
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public override bool CanWrite { get { return false; } }
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public override bool CanSeek { get { return !m_disposed; } }
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public override long Length { get { return m_max_offset; } }
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public override long Position
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{
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get { return m_position; }
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set { m_position = value; }
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}
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public override long Seek (long pos, SeekOrigin whence)
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{
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if (SeekOrigin.Current == whence)
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m_position += pos;
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else if (SeekOrigin.End == whence)
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m_position = m_max_offset + pos;
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else
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m_position = pos;
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return m_position;
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}
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public override void Write (byte[] buf, int index, int count)
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{
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throw new NotSupportedException();
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}
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public override void SetLength (long length)
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{
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throw new NotSupportedException();
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}
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public override void Flush ()
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{
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}
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#endregion
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#region IDisposable methods
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bool m_disposed = false;
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protected override void Dispose (bool disposing)
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{
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if (!m_disposed)
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{
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if (disposing)
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m_view.Dispose();
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m_disposed = true;
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base.Dispose();
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}
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}
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#endregion
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}
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}
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