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317 lines
12 KiB
C#
317 lines
12 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 GameRes.Utility;
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namespace GameRes.Formats.Malie
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{
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internal interface ILibIndexReader : IDisposable
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{
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List<Entry> Dir { get; }
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bool ReadIndex ();
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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 CanWrite { 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 IMalieDecryptor Decryptor;
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public MalieArchive (ArcView file, ArchiveFormat format, ICollection<Entry> dir, IMalieDecryptor decr)
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: base (file, format, dir)
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{
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Decryptor = decr;
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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 "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 CanWrite { 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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Signatures = new uint[] { 0, 0x3F503FB1, 0xC237434E, 0x8CD11522, 0x09D411A7 };
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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 scheme in KnownSchemes.Values)
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{
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var decryptor = scheme.CreateDecryptor();
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ReadEncrypted (file.View, decryptor, 0, header, 0, 0x10);
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ILibIndexReader reader;
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if (Binary.AsciiEqual (header, 0, "LIBP"))
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reader = new LibPReader (file, decryptor, header, scheme);
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else if (Binary.AsciiEqual (header, 0, "LIBU"))
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reader = LibUReader.Create (file, decryptor);
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else
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continue;
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using (reader)
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{
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if (reader.ReadIndex())
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return new MalieArchive (file, this, reader.Dir, decryptor);
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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.Decryptor);
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return new StreamRegion (input, entry.Offset, entry.Size);
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}
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internal abstract class LibIndexReader : ILibIndexReader
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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 IMalieDecryptor m_dec;
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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, IMalieDecryptor decryptor, 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_dec = decryptor;
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m_header = header;
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}
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public abstract bool 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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LibScheme m_scheme;
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public LibPReader (ArcView file, IMalieDecryptor decryptor, byte[] header, LibScheme scheme)
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: base (file, decryptor, header)
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{
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m_base_offset = 0;
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m_scheme = scheme;
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}
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public override bool 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 false;
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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_dec, m_base_offset, m_index, 0, m_index.Length))
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return false;
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m_base_offset += m_index.Length;
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if (offsets.Length != ReadEncrypted (m_view, m_dec, m_base_offset, offsets, 0, offsets.Length))
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return false;
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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_scheme.GetAlignedOffset (m_base_offset);
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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;
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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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private static int ReadEncrypted (ArcView.Frame view, IMalieDecryptor dec, 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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dec.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, LibScheme> KnownSchemes = new Dictionary<string, LibScheme>();
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public override ResourceScheme Scheme
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{
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get { return new MalieScheme { KnownSchemes = KnownSchemes }; }
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set { KnownSchemes = ((MalieScheme)value).KnownSchemes; }
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}
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}
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}
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