mirror of
https://github.com/crskycode/GARbro.git
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415 lines
17 KiB
C#
415 lines
17 KiB
C#
//! \file ArcKogado.cs
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//! \date Sun Aug 24 22:01:05 2014
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//! \brief Kogado game engine archive implementation.
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//
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// Copyright (C) 2014 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.IO;
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using System.Linq;
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using System.Collections.Generic;
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using System.ComponentModel.Composition;
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using System.Security.Cryptography;
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using System.Diagnostics;
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using System.Text;
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using GameRes.Formats.Strings;
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using GameRes.Utility;
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namespace GameRes.Formats.Kogado
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{
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public class KogadoEntry : PackedEntry
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{
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// 0 : Not compressed
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// 1 : Mariel compression
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// 2 : Cocotte compression
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// 3 : Xor 0xff encryption
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public byte CompressionType;
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public bool HasCheckSum;
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public ushort CheckSum;
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public long FileTime;
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}
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[Export(typeof(ArchiveFormat))]
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public class PakOpener : ArchiveFormat
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{
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public override string Tag { get { return "KOGADO"; } }
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public override string Description { get { return arcStrings.KogadoDescription; } }
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public override uint Signature { get { return 0x61507948; } } // 'HyPa'
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public override bool IsHierarchic { get { return false; } }
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public override bool CanCreate { get { return true; } }
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public PakOpener ()
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{
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Extensions = new string[] { "pak" };
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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 (0, "HyPack\x00"))
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return null;
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int version = file.View.ReadByte (7);
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if (2 != version && 3 != version)
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return null;
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uint index_offset = 0x10 + file.View.ReadUInt32 (8);
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if (index_offset >= file.MaxOffset)
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return null;
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uint entry_count = file.View.ReadUInt32 (12);
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if (entry_count > 0xfffff)
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return null;
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uint index_size = entry_count * 48;
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if (index_size > file.View.Reserve (index_offset, index_size))
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return null;
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long data_offset = 0x10;
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var dir = new List<Entry> ((int)entry_count);
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for (uint i = 0; i < entry_count; ++i)
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{
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string name = file.View.ReadString (index_offset, 0x15);
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string ext = file.View.ReadString (index_offset+0x15, 3);
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var entry = new KogadoEntry { Name = name+'.'+ext };
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entry.Type = FormatCatalog.Instance.GetTypeFromName (entry.Name);
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entry.Offset = data_offset + file.View.ReadUInt32 (index_offset + 0x18);
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entry.UnpackedSize = file.View.ReadUInt32 (index_offset + 0x1c);
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entry.Size = file.View.ReadUInt32 (index_offset + 0x20);
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if (!entry.CheckPlacement (file.MaxOffset))
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return null;
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entry.CompressionType = file.View.ReadByte (index_offset + 0x24);
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entry.HasCheckSum = 0 != file.View.ReadByte (index_offset + 0x25);
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entry.CheckSum = file.View.ReadUInt16 (index_offset + 0x26);
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entry.FileTime = file.View.ReadInt64 (index_offset + 0x28);
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entry.IsPacked = 0 != entry.CompressionType;
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dir.Add (entry);
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index_offset += 48;
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}
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return new ArcFile (file, this, dir);
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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 input = arc.File.CreateStream (entry.Offset, entry.Size);
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var packed_entry = entry as KogadoEntry;
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if (null == packed_entry || !packed_entry.IsPacked)
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return input;
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if (packed_entry.CompressionType > 3)
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{
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Trace.WriteLine (string.Format ("{1}: Unknown compression type {0}",
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packed_entry.CompressionType, packed_entry.Name),
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"Kogado.PakOpener.OpenEntry");
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return input;
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}
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if (3 == packed_entry.CompressionType)
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return new CryptoStream (input, new NotTransform(), CryptoStreamMode.Read);
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try
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{
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if (2 == packed_entry.CompressionType)
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{
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var decoded = new MemoryStream ((int)packed_entry.UnpackedSize);
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try
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{
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var cocotte = new CocotteEncoder();
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if (!cocotte.Decode (input, decoded))
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throw new InvalidFormatException ("Invalid Cocotte-encoded stream");
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decoded.Position = 0;
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return decoded;
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}
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catch
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{
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decoded.Dispose();
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throw;
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}
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}
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// if (1 == packed_entry.CompressionType)
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var unpacked = new byte[packed_entry.UnpackedSize];
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var mariel = new MarielEncoder();
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mariel.Unpack (input, unpacked, unpacked.Length);
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return new MemoryStream (unpacked, false);
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}
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finally
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{
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input.Dispose();
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}
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}
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internal class OutputEntry : KogadoEntry
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{
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public byte[] IndexName;
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public byte[] IndexExt;
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}
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// files inside archive are aligned to 0x10 boundary.
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// to convert DateTime structure into entry time:
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// entry.FileTime = file_info.CreationTimeUtc.Ticks;
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//
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// last two bytes of archive is CRC16 of the whole file
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public override void Create (Stream output, IEnumerable<Entry> list, ResourceOptions options,
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EntryCallback callback)
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{
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const long data_offset = 0x10;
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var encoding = Encodings.cp932.WithFatalFallback();
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int callback_count = 0;
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var output_list = new List<OutputEntry> (list.Count());
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foreach (var entry in list)
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{
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try
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{
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string name = Path.GetFileNameWithoutExtension (entry.Name);
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string ext = Path.GetExtension (entry.Name);
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byte[] name_buf = new byte[0x15];
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byte[] ext_buf = new byte[3];
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encoding.GetBytes (name, 0, name.Length, name_buf, 0);
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if (!string.IsNullOrEmpty (ext))
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{
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ext = ext.TrimStart ('.').ToLowerInvariant();
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encoding.GetBytes (ext, 0, ext.Length, ext_buf, 0);
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}
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var out_entry = new OutputEntry
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{
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Name = entry.Name,
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IndexName = name_buf,
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IndexExt = ext_buf,
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};
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output_list.Add (out_entry);
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}
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catch (EncoderFallbackException X)
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{
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throw new InvalidFileName (entry.Name, arcStrings.MsgIllegalCharacters, X);
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}
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catch (ArgumentException X)
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{
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throw new InvalidFileName (entry.Name, arcStrings.MsgFileNameTooLong, X);
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}
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}
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if (null != callback)
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callback (output_list.Count+2, null, null);
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output.Position = data_offset;
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uint current_offset = 0;
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foreach (var entry in output_list)
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{
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if (null != callback)
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callback (callback_count++, entry, arcStrings.MsgAddingFile);
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entry.FileTime = File.GetCreationTimeUtc (entry.Name).Ticks;
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entry.Offset = current_offset;
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entry.CompressionType = 0;
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using (var input = File.OpenRead (entry.Name))
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{
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var size = input.Length;
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if (size > uint.MaxValue || current_offset + size + 0x0f > uint.MaxValue)
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throw new FileSizeException();
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entry.Size = (uint)size;
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entry.UnpackedSize = entry.Size;
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using (var checked_stream = new CheckedStream (output, new Crc16()))
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{
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input.CopyTo (checked_stream);
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entry.HasCheckSum = true;
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entry.CheckSum = (ushort)checked_stream.CheckSumValue;
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}
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current_offset += (uint)size + 0x0f;
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current_offset &= ~0x0fu;
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output.Position = data_offset + current_offset;
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}
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}
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if (null != callback)
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callback (callback_count++, null, arcStrings.MsgUpdatingIndex);
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// at last, go back to directory and write offset/sizes
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uint index_offset = current_offset;
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using (var index = new BinaryWriter (output, encoding, true))
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{
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foreach (var entry in output_list)
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{
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index.Write (entry.IndexName);
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index.Write (entry.IndexExt);
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index.Write ((uint)entry.Offset);
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index.Write (entry.UnpackedSize);
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index.Write (entry.Size);
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index.Write (entry.CompressionType);
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index.Write (entry.HasCheckSum);
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index.Write (entry.CheckSum);
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index.Write (entry.FileTime);
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}
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index.BaseStream.Position = 0;
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index.Write (Signature);
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index.Write (0x03006b63);
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index.Write (index_offset);
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index.Write (output_list.Count);
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if (null != callback)
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callback (callback_count++, null, arcStrings.MsgCalculatingChecksum);
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output.Position = 0;
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using (var checked_stream = new CheckedStream (output, new Crc16()))
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{
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checked_stream.CopyTo (Stream.Null);
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index.Write ((ushort)checked_stream.CheckSumValue);
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}
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}
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}
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}
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public sealed class Crc16 : ICheckSum
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{
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private ushort m_value = 0xffff;
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public uint Value { get { return m_value; } }
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public void Update (byte[] buf, int pos, int len)
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{
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for (int i = 0; i < len; ++i)
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{
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m_value = (ushort)(Crc16Table[(m_value^buf[pos+i]) & 0xff] ^ (m_value >> 8));
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}
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}
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private static readonly ushort[] Crc16Table = {
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0x0000, 0x1189, 0x2312, 0x329b, 0x4624, 0x57ad, 0x6536, 0x74bf,
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0x8c48, 0x9dc1, 0xaf5a, 0xbed3, 0xca6c, 0xdbe5, 0xe97e, 0xf8f7,
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0x1081, 0x0108, 0x3393, 0x221a, 0x56a5, 0x472c, 0x75b7, 0x643e,
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0x9cc9, 0x8d40, 0xbfdb, 0xae52, 0xdaed, 0xcb64, 0xf9ff, 0xe876,
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0x2102, 0x308b, 0x0210, 0x1399, 0x6726, 0x76af, 0x4434, 0x55bd,
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0xad4a, 0xbcc3, 0x8e58, 0x9fd1, 0xeb6e, 0xfae7, 0xc87c, 0xd9f5,
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0x3183, 0x200a, 0x1291, 0x0318, 0x77a7, 0x662e, 0x54b5, 0x453c,
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0xbdcb, 0xac42, 0x9ed9, 0x8f50, 0xfbef, 0xea66, 0xd8fd, 0xc974,
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0x4204, 0x538d, 0x6116, 0x709f, 0x0420, 0x15a9, 0x2732, 0x36bb,
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0xce4c, 0xdfc5, 0xed5e, 0xfcd7, 0x8868, 0x99e1, 0xab7a, 0xbaf3,
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0x5285, 0x430c, 0x7197, 0x601e, 0x14a1, 0x0528, 0x37b3, 0x263a,
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0xdecd, 0xcf44, 0xfddf, 0xec56, 0x98e9, 0x8960, 0xbbfb, 0xaa72,
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0x6306, 0x728f, 0x4014, 0x519d, 0x2522, 0x34ab, 0x0630, 0x17b9,
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0xef4e, 0xfec7, 0xcc5c, 0xddd5, 0xa96a, 0xb8e3, 0x8a78, 0x9bf1,
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0x7387, 0x620e, 0x5095, 0x411c, 0x35a3, 0x242a, 0x16b1, 0x0738,
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0xffcf, 0xee46, 0xdcdd, 0xcd54, 0xb9eb, 0xa862, 0x9af9, 0x8b70,
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0x8408, 0x9581, 0xa71a, 0xb693, 0xc22c, 0xd3a5, 0xe13e, 0xf0b7,
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0x0840, 0x19c9, 0x2b52, 0x3adb, 0x4e64, 0x5fed, 0x6d76, 0x7cff,
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0x9489, 0x8500, 0xb79b, 0xa612, 0xd2ad, 0xc324, 0xf1bf, 0xe036,
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0x18c1, 0x0948, 0x3bd3, 0x2a5a, 0x5ee5, 0x4f6c, 0x7df7, 0x6c7e,
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0xa50a, 0xb483, 0x8618, 0x9791, 0xe32e, 0xf2a7, 0xc03c, 0xd1b5,
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0x2942, 0x38cb, 0x0a50, 0x1bd9, 0x6f66, 0x7eef, 0x4c74, 0x5dfd,
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0xb58b, 0xa402, 0x9699, 0x8710, 0xf3af, 0xe226, 0xd0bd, 0xc134,
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0x39c3, 0x284a, 0x1ad1, 0x0b58, 0x7fe7, 0x6e6e, 0x5cf5, 0x4d7c,
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0xc60c, 0xd785, 0xe51e, 0xf497, 0x8028, 0x91a1, 0xa33a, 0xb2b3,
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0x4a44, 0x5bcd, 0x6956, 0x78df, 0x0c60, 0x1de9, 0x2f72, 0x3efb,
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0xd68d, 0xc704, 0xf59f, 0xe416, 0x90a9, 0x8120, 0xb3bb, 0xa232,
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0x5ac5, 0x4b4c, 0x79d7, 0x685e, 0x1ce1, 0x0d68, 0x3ff3, 0x2e7a,
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0xe70e, 0xf687, 0xc41c, 0xd595, 0xa12a, 0xb0a3, 0x8238, 0x93b1,
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0x6b46, 0x7acf, 0x4854, 0x59dd, 0x2d62, 0x3ceb, 0x0e70, 0x1ff9,
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0xf78f, 0xe606, 0xd49d, 0xc514, 0xb1ab, 0xa022, 0x92b9, 0x8330,
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0x7bc7, 0x6a4e, 0x58d5, 0x495c, 0x3de3, 0x2c6a, 0x1ef1, 0x0f78,
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};
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}
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internal class MarielEncoder
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{
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public void Unpack (Stream input, byte[] dest, int dest_size)
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{
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int out_pos = 0;
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using (var reader = new BinaryReader (input, Encoding.ASCII, true))
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{
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uint bits = 0;
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while (dest_size > 0)
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{
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bool carry = 0 != (bits & 0x80000000);
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bits <<= 1;
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if (0 == bits)
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{
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bits = reader.ReadUInt32();
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carry = 0 != (bits & 0x80000000);
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bits = (bits << 1) | 1u;
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}
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int b = input.ReadByte();
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if (-1 == b)
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break;
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if (!carry)
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{
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dest[out_pos++] = (byte)b;
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dest_size--;
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continue;
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}
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int offset = (b & 0x0f) + 1;
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int count = ((b >> 4) & 0x0f) + 1;
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if (0x0f == count)
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{
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b = input.ReadByte();
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if (-1 == b)
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break;
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count = (byte)b;
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}
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else if (count > 0x0f)
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{
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count = reader.ReadUInt16();
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}
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if (offset >= 0x0b)
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{
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offset -= 0x0b;
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offset <<= 8;
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offset |= reader.ReadByte();
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}
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if (count > dest_size)
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count = dest_size;
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int src = out_pos - offset;
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if (src < 0 || src >= out_pos)
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break;
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Binary.CopyOverlapped (dest, src, out_pos, count);
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out_pos += count;
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dest_size -= count;
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}
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}
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}
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}
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public sealed class NotTransform : ICryptoTransform
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{
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private const int BlockSize = 256;
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public bool CanReuseTransform { get { return true; } }
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public bool CanTransformMultipleBlocks { get { return true; } }
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public int InputBlockSize { get { return BlockSize; } }
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public int OutputBlockSize { get { return BlockSize; } }
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public int TransformBlock (byte[] inputBuffer, int inputOffset, int inputCount,
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byte[] outputBuffer, int outputOffset)
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{
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for (int i = 0; i < inputCount; ++i)
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{
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outputBuffer[outputOffset++] = (byte)~inputBuffer[inputOffset+i];
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}
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return inputCount;
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}
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public byte[] TransformFinalBlock (byte[] inputBuffer, int inputOffset, int inputCount)
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{
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byte[] outputBuffer = new byte[inputCount];
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TransformBlock (inputBuffer, inputOffset, inputCount, outputBuffer, 0);
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return outputBuffer;
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}
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public void Dispose ()
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{
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System.GC.SuppressFinalize (this);
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}
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}
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}
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