mirror of
https://github.com/crskycode/GARbro.git
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432 lines
17 KiB
C#
432 lines
17 KiB
C#
//! \file ArcTactics.cs
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//! \date Thu Jul 23 16:27:55 2015
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//! \brief Tactics archive file 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.Security.Cryptography;
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using GameRes.Compression;
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using GameRes.Formats.Properties;
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using GameRes.Formats.Strings;
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using GameRes.Utility;
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namespace GameRes.Formats.Tactics
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{
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internal class TacticsArcFile : ArcFile
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{
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public readonly byte[] Password;
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public readonly bool CustomLzss;
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public TacticsArcFile (ArcView file, ArchiveFormat format, ICollection<Entry> dir, byte[] pass)
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: base (file, format, dir)
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{
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Password = pass;
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CustomLzss = false;
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}
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public TacticsArcFile (ArcView file, ArchiveFormat format, ICollection<Entry> dir, ArcScheme scheme)
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: base (file, format, dir)
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{
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Password = Encodings.cp932.GetBytes (scheme.Password);
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CustomLzss = scheme.CustomLzss;
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}
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}
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[Export(typeof(ArchiveFormat))]
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public class ArcOpener : ArchiveFormat
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{
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public override string Tag { get { return "ARC/Tactics"; } }
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public override string Description { get { return "Tactics archive file"; } }
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public override uint Signature { get { return 0x54434154; } } // 'TACT'
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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 ArcOpener ()
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{
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Extensions = new string[] { "arc", "adf" };
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}
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public override ArcFile TryOpen (ArcView file)
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{
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if (!file.View.AsciiEqual (4, "ICS_ARC_FILE"))
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return null;
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var reader = new IndexReader (file);
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var dir = reader.ReadIndex();
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if (null == dir)
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return null;
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return new TacticsArcFile (file, this, dir, reader.Password);
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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 tarc = arc as TacticsArcFile;
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var tent = (PackedEntry)entry;
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if (null == tarc || null == tarc.Password && !tent.IsPacked)
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return arc.File.CreateStream (entry.Offset, entry.Size);
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if (null == tarc.Password)
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return new LzssStream (arc.File.CreateStream (entry.Offset, entry.Size));
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var data = arc.File.View.ReadBytes (entry.Offset, entry.Size);
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int p = 0;
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for (int i = 0; i < data.Length; ++i)
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{
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data[i] ^= tarc.Password[p++];
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if (p == tarc.Password.Length)
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p = 0;
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}
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if (tarc.CustomLzss && tent.IsPacked)
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{
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data = UnpackCustomLzss (data);
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return new MemoryStream (data);
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}
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Stream input = new MemoryStream (data);
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if (tent.IsPacked)
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input = new LzssStream (input);
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return input;
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}
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internal class IndexReader
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{
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ArcView m_file;
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uint m_packed_size;
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uint m_unpacked_size;
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int m_count;
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byte[] m_index;
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Lazy<List<Entry>> m_dir;
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public byte[] Password { get; private set; }
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public IndexReader (ArcView file)
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{
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m_file = file;
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m_packed_size = m_file.View.ReadUInt32 (0x10);
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m_unpacked_size = m_file.View.ReadUInt32 (0x14);
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m_count = m_file.View.ReadInt32 (0x18);
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m_dir = new Lazy<List<Entry>> (() => new List<Entry> (m_count));
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}
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public List<Entry> ReadIndex ()
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{
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if (!IsSaneCount (m_count) || m_packed_size+0x20L > m_file.MaxOffset)
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return null;
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m_index = new byte[m_unpacked_size];
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var readers = new Func<Stream, bool>[] {
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ReadV0,
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s => ReadV1 (s, 0x18),
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s => ReadV1 (s, 0x10),
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};
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using (var input = m_file.CreateStream (0x20, m_packed_size))
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{
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foreach (var read in readers)
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{
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try
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{
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if (read (input))
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return m_dir.Value;
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}
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catch { /* ignore parse errors */ }
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input.Position = 0;
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if (m_dir.IsValueCreated)
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m_dir.Value.Clear();
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}
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return null;
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}
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}
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bool ReadV1 (Stream input, int entry_size)
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{
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// NOTE CryptoStream will close an input stream
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using (var proxy = new InputProxyStream (input, true))
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using (var xored = new CryptoStream (proxy, new NotTransform(), CryptoStreamMode.Read))
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using (var lzss = new LzssStream (xored))
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if (m_index.Length != lzss.Read (m_index, 0, m_index.Length))
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return false;
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int index_offset = Array.IndexOf<byte> (m_index, 0);
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if (-1 == index_offset || 0 == index_offset)
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return false;
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Password = m_index.Take (index_offset++).ToArray();
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long base_offset = 0x20 + m_packed_size;
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for (int i = 0; i < m_count; ++i)
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{
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var entry = new PackedEntry();
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entry.Offset = LittleEndian.ToUInt32 (m_index, index_offset) + base_offset;
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entry.Size = LittleEndian.ToUInt32 (m_index, index_offset + 4);
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if (!entry.CheckPlacement (m_file.MaxOffset))
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return false;
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entry.UnpackedSize = LittleEndian.ToUInt32 (m_index, index_offset + 8);
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entry.IsPacked = entry.UnpackedSize != 0;
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if (!entry.IsPacked)
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entry.UnpackedSize = entry.Size;
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int name_len = LittleEndian.ToInt32 (m_index, index_offset + 0xC);
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if (name_len <= 0 || name_len > 0x100)
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return false;
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entry.Name = Encodings.cp932.GetString (m_index, index_offset+entry_size, name_len);
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entry.Type = FormatCatalog.Instance.GetTypeFromName (entry.Name);
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m_dir.Value.Add (entry);
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index_offset += entry_size + name_len;
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}
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return true;
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}
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bool ReadV0 (Stream input)
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{
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long current_offset = 0x20 + m_packed_size;
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uint offset_table_size = (uint)m_count * 0x10;
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if (offset_table_size > m_file.View.Reserve (current_offset, offset_table_size))
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return false;
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using (var lzss = new LzssStream (input, LzssMode.Decompress, true))
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if (m_index.Length != lzss.Read (m_index, 0, m_index.Length))
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return false;
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for (int i = 0; i < m_index.Length; ++i)
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{
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m_index[i] = (byte)(~m_index[i] - 5);
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}
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int index_offset = Array.IndexOf<byte> (m_index, 0);
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if (-1 == index_offset || 0 == index_offset)
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return false;
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index_offset++;
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// Password = m_index.Take (index_offset++).ToArray();
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for (int i = 0; i < m_count && index_offset < m_index.Length; ++i)
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{
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int name_end = Array.IndexOf<byte> (m_index, 0, index_offset);
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if (-1 == name_end)
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name_end = m_index.Length;
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if (index_offset == name_end)
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return false;
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var entry = new PackedEntry();
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entry.Offset = m_file.View.ReadUInt32 (current_offset);
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entry.Size = m_file.View.ReadUInt32 (current_offset+4);
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entry.UnpackedSize = m_file.View.ReadUInt32 (current_offset+8);
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entry.IsPacked = entry.UnpackedSize != 0;
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if (!entry.CheckPlacement (m_file.MaxOffset))
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return false;
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entry.Name = Encodings.cp932.GetString (m_index, index_offset, name_end-index_offset);
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entry.Type = FormatCatalog.Instance.GetTypeFromName (entry.Name);
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m_dir.Value.Add (entry);
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index_offset = name_end+1;
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current_offset += 0x10;
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}
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return true;
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}
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}
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static readonly ushort[] LzRefTable = {
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0x0001, 0x0804, 0x1001, 0x2001, 0x0002, 0x0805, 0x1002, 0x2002,
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0x0003, 0x0806, 0x1003, 0x2003, 0x0004, 0x0807, 0x1004, 0x2004,
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0x0005, 0x0808, 0x1005, 0x2005, 0x0006, 0x0809, 0x1006, 0x2006,
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0x0007, 0x080A, 0x1007, 0x2007, 0x0008, 0x080B, 0x1008, 0x2008,
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0x0009, 0x0904, 0x1009, 0x2009, 0x000A, 0x0905, 0x100A, 0x200A,
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0x000B, 0x0906, 0x100B, 0x200B, 0x000C, 0x0907, 0x100C, 0x200C,
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0x000D, 0x0908, 0x100D, 0x200D, 0x000E, 0x0909, 0x100E, 0x200E,
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0x000F, 0x090A, 0x100F, 0x200F, 0x0010, 0x090B, 0x1010, 0x2010,
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0x0011, 0x0A04, 0x1011, 0x2011, 0x0012, 0x0A05, 0x1012, 0x2012,
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0x0013, 0x0A06, 0x1013, 0x2013, 0x0014, 0x0A07, 0x1014, 0x2014,
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0x0015, 0x0A08, 0x1015, 0x2015, 0x0016, 0x0A09, 0x1016, 0x2016,
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0x0017, 0x0A0A, 0x1017, 0x2017, 0x0018, 0x0A0B, 0x1018, 0x2018,
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0x0019, 0x0B04, 0x1019, 0x2019, 0x001A, 0x0B05, 0x101A, 0x201A,
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0x001B, 0x0B06, 0x101B, 0x201B, 0x001C, 0x0B07, 0x101C, 0x201C,
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0x001D, 0x0B08, 0x101D, 0x201D, 0x001E, 0x0B09, 0x101E, 0x201E,
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0x001F, 0x0B0A, 0x101F, 0x201F, 0x0020, 0x0B0B, 0x1020, 0x2020,
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0x0021, 0x0C04, 0x1021, 0x2021, 0x0022, 0x0C05, 0x1022, 0x2022,
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0x0023, 0x0C06, 0x1023, 0x2023, 0x0024, 0x0C07, 0x1024, 0x2024,
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0x0025, 0x0C08, 0x1025, 0x2025, 0x0026, 0x0C09, 0x1026, 0x2026,
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0x0027, 0x0C0A, 0x1027, 0x2027, 0x0028, 0x0C0B, 0x1028, 0x2028,
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0x0029, 0x0D04, 0x1029, 0x2029, 0x002A, 0x0D05, 0x102A, 0x202A,
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0x002B, 0x0D06, 0x102B, 0x202B, 0x002C, 0x0D07, 0x102C, 0x202C,
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0x002D, 0x0D08, 0x102D, 0x202D, 0x002E, 0x0D09, 0x102E, 0x202E,
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0x002F, 0x0D0A, 0x102F, 0x202F, 0x0030, 0x0D0B, 0x1030, 0x2030,
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0x0031, 0x0E04, 0x1031, 0x2031, 0x0032, 0x0E05, 0x1032, 0x2032,
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0x0033, 0x0E06, 0x1033, 0x2033, 0x0034, 0x0E07, 0x1034, 0x2034,
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0x0035, 0x0E08, 0x1035, 0x2035, 0x0036, 0x0E09, 0x1036, 0x2036,
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0x0037, 0x0E0A, 0x1037, 0x2037, 0x0038, 0x0E0B, 0x1038, 0x2038,
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0x0039, 0x0F04, 0x1039, 0x2039, 0x003A, 0x0F05, 0x103A, 0x203A,
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0x003B, 0x0F06, 0x103B, 0x203B, 0x003C, 0x0F07, 0x103C, 0x203C,
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0x0801, 0x0F08, 0x103D, 0x203D, 0x1001, 0x0F09, 0x103E, 0x203E,
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0x1801, 0x0F0A, 0x103F, 0x203F, 0x2001, 0x0F0B, 0x1040, 0x2040,
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};
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internal byte[] UnpackCustomLzss (byte[] input)
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{
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int unpacked_size = 0;
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int src = 0;
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int i = 0;
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byte b;
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do
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{
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b = input[src++];
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unpacked_size |= (b & 0x7F) << i;
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i += 7;
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}
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while (b >= 0x80);
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if (unpacked_size <= 0)
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throw new InvalidEncryptionScheme();
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var output = new byte[unpacked_size];
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int dst = 0;
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while (dst < unpacked_size)
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{
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b = input[src++];
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if (0 != (b & 3))
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{
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int offset_length = (LzRefTable[b] >> 8) & ~7;
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int offset = 0;
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for (i = 0; i < offset_length; i += 8)
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offset |= input[src++] << i;
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offset += LzRefTable[b] & 0x700;
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int count = LzRefTable[b] & 0xFF;
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Binary.CopyOverlapped (output, dst - offset, dst, count);
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dst += count;
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}
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else
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{
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int count = (b >> 2) + 1;
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if (count >= 0x3D)
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{
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int count_length = (count - 0x3C) * 8;
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count = 0;
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for (i = 0; i < count_length; i += 8)
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count |= input[src++] << i;
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count++;
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}
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Buffer.BlockCopy (input, src, output, dst, count);
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src += count;
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dst += count;
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}
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}
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return output;
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}
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}
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[Export(typeof(ArchiveFormat))]
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public class Arc2Opener : ArcOpener
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{
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public override string Tag { get { return "ARC/Tactics/2"; } }
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public override bool CanCreate { get { return false; } }
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public Arc2Opener ()
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{
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Extensions = new string[] { "arc" };
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}
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public override ArcFile TryOpen (ArcView file)
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{
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if (!file.View.AsciiEqual (4, "ICS_ARC_FILE"))
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return null;
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var dir = new List<Entry>();
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long offset = 0x10;
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while (offset < file.MaxOffset)
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{
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uint size = file.View.ReadUInt32 (offset);
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uint unpacked_size = file.View.ReadUInt32 (offset+4);
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uint name_length = file.View.ReadUInt32 (offset+8);
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if (0 == name_length)
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break;
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if (name_length > 0x100)
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return null;
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offset += 0x14;
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var name = file.View.ReadString (offset, name_length);
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offset += name_length;
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if (offset + size > file.MaxOffset)
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return null;
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var entry = FormatCatalog.Instance.Create<PackedEntry> (name);
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entry.Offset = offset;
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entry.Size = size;
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entry.IsPacked = unpacked_size != 0;
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entry.UnpackedSize = entry.IsPacked ? unpacked_size : size;
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dir.Add (entry);
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offset += size;
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}
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if (0 == dir.Count)
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return null;
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var scheme = QueryScheme();
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if (null == scheme)
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return null;
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return new TacticsArcFile (file, this, dir, scheme);
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}
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ArcScheme QueryScheme ()
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{
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var options = Query<TacticsOptions> (arcStrings.ArcEncryptedNotice);
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return options.Scheme;
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}
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public override ResourceOptions GetDefaultOptions ()
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{
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string title = Settings.Default.TacticsArcTitle;
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ArcScheme scheme = null;
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if (!KnownSchemes.TryGetValue (title, out scheme) && !string.IsNullOrEmpty (Settings.Default.TacticsArcPassword))
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scheme = new ArcScheme (Settings.Default.TacticsArcPassword);
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return new TacticsOptions { Scheme = scheme };
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}
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public override object GetAccessWidget ()
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{
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return new GUI.WidgetTactics();
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}
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public static Dictionary<string, ArcScheme> KnownSchemes = new Dictionary<string, ArcScheme>();
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public override ResourceScheme Scheme
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{
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get { return new SchemeMap { KnownSchemes = KnownSchemes }; }
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set { KnownSchemes = ((SchemeMap)value).KnownSchemes; }
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}
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}
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public class TacticsOptions : ResourceOptions
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{
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public ArcScheme Scheme;
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}
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[Serializable]
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public class ArcScheme
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{
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public string Password;
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public bool CustomLzss;
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public ArcScheme (string password, bool custom_lzss = false)
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{
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Password = password;
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CustomLzss = custom_lzss;
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}
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}
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[Serializable]
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public class SchemeMap : ResourceScheme
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{
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public Dictionary<string, ArcScheme> KnownSchemes;
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}
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}
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