mirror of
https://github.com/crskycode/GARbro.git
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239 lines
9.2 KiB
C#
239 lines
9.2 KiB
C#
//! \file ArcTAC.cs
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//! \date Wed Jan 25 04:41:35 2017
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//! \brief TanukiSoft resource archive.
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//
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// Copyright (C) 2017 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.Text;
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using GameRes.Compression;
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using GameRes.Cryptography;
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namespace GameRes.Formats.Tanuki
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{
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[Export(typeof(ArchiveFormat))]
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public class TacOpener : ArchiveFormat
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{
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public override string Tag { get { return "TAC"; } }
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public override string Description { get { return "TanukiSoft resource archive"; } }
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public override uint Signature { get { return 0x63724154; } } // 'TArc'
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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 TacOpener ()
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{
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Extensions = new string[] { "tac", "stx" };
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}
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static readonly byte[] IndexKey = Encoding.ASCII.GetBytes ("TLibArchiveData");
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static readonly string ListFileName = "tanuki.lst";
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public override ArcFile TryOpen (ArcView file)
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{
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int version;
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if (file.View.AsciiEqual (4, "1.00"))
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version = 100;
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else if (file.View.AsciiEqual (4, "1.10"))
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version = 110;
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else
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return null;
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int count = file.View.ReadInt32 (0x14);
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if (!IsSaneCount (count))
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return null;
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int bucket_count = file.View.ReadInt32 (0x18);
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uint index_size = file.View.ReadUInt32 (0x1C);
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uint arc_seed = file.View.ReadUInt32 (0x20);
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long index_offset = version >= 110 ? 0x2C : 0x24;
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long base_offset = index_offset + index_size;
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var blowfish = new Blowfish (IndexKey);
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var packed_bytes = file.View.ReadBytes (index_offset, index_size);
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blowfish.Decipher (packed_bytes, packed_bytes.Length & ~7);
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using (var input = new MemoryStream (packed_bytes))
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using (var unpacked = new ZLibStream (input, CompressionMode.Decompress))
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using (var index = new BinaryReader (unpacked))
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{
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var file_map = BuildFileNameMap (arc_seed);
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var dir_table = new List<TacBucket> (bucket_count);
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for (int i = 0; i < bucket_count; ++i)
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{
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var entry = new TacBucket();
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entry.Hash = index.ReadUInt16();
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entry.Count = index.ReadUInt16();
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entry.Index = index.ReadInt32();
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dir_table.Add (entry);
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}
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var dir = new List<Entry> (count);
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for (int i = 0; i < count; ++i)
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{
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var entry = new TacEntry();
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entry.Hash = index.ReadUInt64();
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entry.IsPacked = index.ReadInt32() != 0;
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entry.UnpackedSize = index.ReadUInt32();
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entry.Offset = base_offset + index.ReadUInt32();
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entry.Size = index.ReadUInt32();
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if (!entry.CheckPlacement (file.MaxOffset))
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return null;
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dir.Add (entry);
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}
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var buffer = new byte[8];
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foreach (var bucket in dir_table)
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{
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for (int i = 0; i < bucket.Count; ++i)
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{
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var entry = dir[bucket.Index+i] as TacEntry;
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entry.Hash = entry.Hash << 16 | bucket.Hash;
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bool known_name = file_map.ContainsKey (entry.Hash);
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if (known_name)
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{
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entry.Name = file_map[entry.Hash];
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entry.Type = FormatCatalog.Instance.GetTypeFromName (entry.Name);
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}
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else
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{
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entry.Name = string.Format ("{0:X16}", entry.Hash);
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}
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if (entry.IsPacked)
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continue;
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entry.Key = Encoding.ASCII.GetBytes (string.Format ("{0}_tlib_secure_", entry.Hash));
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if (!known_name)
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{
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var bf = new Blowfish (entry.Key);
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file.View.Read (entry.Offset, buffer, 0, 8);
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bf.Decipher (buffer, 8);
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var res = AutoEntry.DetectFileType (buffer.ToUInt32 (0));
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if (res != null)
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entry.ChangeType (res);
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}
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if ("image" == entry.Type)
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entry.EncryptedSize = Math.Min (10240, entry.Size);
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else
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entry.EncryptedSize = entry.Size;
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}
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}
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return new ArcFile (file, this, dir);
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}
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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 tent = entry as TacEntry;
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if (null == tent)
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return base.OpenEntry (arc, entry);
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if (tent.IsPacked)
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{
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var input = arc.File.CreateStream (entry.Offset, entry.Size);
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return new ZLibStream (input, CompressionMode.Decompress);
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}
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var bf = new Blowfish (tent.Key);
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if (tent.EncryptedSize < tent.Size)
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{
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var header = arc.File.View.ReadBytes (tent.Offset, tent.EncryptedSize);
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bf.Decipher (header, header.Length);
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var rest = arc.File.CreateStream (tent.Offset+tent.EncryptedSize, tent.Size-tent.EncryptedSize);
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return new PrefixStream (header, rest);
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}
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else if (0 == (tent.Size & 7))
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{
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var input = arc.File.CreateStream (tent.Offset, tent.Size);
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return new InputCryptoStream (input, bf.CreateDecryptor());
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}
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else
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{
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var data = arc.File.View.ReadBytes (tent.Offset, tent.Size);
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bf.Decipher (data, data.Length & ~7);
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return new BinMemoryStream (data);
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}
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}
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internal static ulong HashFromString (string s, uint seed)
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{
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s = s.Replace ('\\', '/').ToUpperInvariant();
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var bytes = Encodings.cp932.GetBytes (s);
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ulong hash = 0;
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for (int i = 0; i < bytes.Length; ++i)
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{
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hash = bytes[i] + 0x19919 * hash + seed;
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}
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return hash;
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}
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internal static ulong HashFromAsciiString (string s, uint seed)
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{
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ulong hash = 0;
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for (int i = 0; i < s.Length; ++i)
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{
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hash = (uint)char.ToUpperInvariant (s[i]) + 0x19919 * hash + seed;
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}
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return hash;
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}
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Dictionary<ulong, string> BuildFileNameMap (uint seed)
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{
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var map = new Dictionary<ulong, string> (KnownNames.Length);
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foreach (var name in KnownNames)
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{
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map[HashFromAsciiString (name, seed)] = name;
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}
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return map;
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}
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internal string[] KnownNames { get { return s_known_file_names.Value; } }
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static Lazy<string[]> s_known_file_names = new Lazy<string[]> (ReadTanukiLst);
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static string[] ReadTanukiLst ()
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{
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try
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{
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var names = new List<string>();
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FormatCatalog.Instance.ReadFileList (ListFileName, name => names.Add (name));
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return names.ToArray();
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}
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catch (Exception X)
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{
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System.Diagnostics.Trace.WriteLine (X.Message, "[TAC]");
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return new string[0];
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}
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}
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}
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internal class TacEntry : PackedEntry
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{
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public ulong Hash;
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public byte[] Key;
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public uint EncryptedSize;
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}
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internal class TacBucket
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{
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public ushort Hash;
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public int Count;
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public int Index;
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}
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}
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