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230 lines
8.9 KiB
C#
230 lines
8.9 KiB
C#
//! \file ArcYPF.cs
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//! \date Mon Jul 14 14:40:06 2014
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//! \brief YPF resource format 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.Text;
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using System.Collections.Generic;
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using System.ComponentModel.Composition;
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using System.Windows.Media;
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using System.Windows.Media.Imaging;
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using ZLibNet;
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using GameRes.Formats.Strings;
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using GameRes.Formats.Properties;
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namespace GameRes.Formats
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{
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public class YpfOptions : ResourceOptions
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{
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public uint Key { get; set; }
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}
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[Export(typeof(ArchiveFormat))]
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public class YpfOpener : ArchiveFormat
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{
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public override string Tag { get { return "YPF"; } }
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public override string Description { get { return arcStrings.YPFDescription; } }
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public override uint Signature { get { return 0x00465059; } }
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public override bool IsHierarchic { get { return true; } }
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private const uint DefaultKey = 0xffffffff;
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public override ArcFile TryOpen (ArcView file)
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{
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uint count = file.View.ReadUInt32 (8);
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uint dir_size = file.View.ReadUInt32 (12);
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if (dir_size < count * 0x17)
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return null;
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if (0 != ((count - 1) >> 20))
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return null;
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// Reserve (0x20, dir_size)
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var parser = new Parser (file, count, dir_size);
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uint key = QueryEncryptionKey();
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var dir = parser.ScanDir (key);
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if (0 == dir.Count)
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return null;
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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 PackedEntry;
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if (null == packed_entry || !packed_entry.IsPacked)
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return input;
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else
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return new ZLibStream (input, CompressionMode.Decompress);
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}
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public override ResourceOptions GetDefaultOptions ()
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{
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return new YpfOptions { Key = Settings.Default.YPFKey };
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}
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public override ResourceOptions GetOptions (object w)
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{
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var widget = w as GUI.WidgetYPF;
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if (null != widget)
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{
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uint last_key = widget.GetKey() ?? DefaultKey;
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Settings.Default.YPFKey = last_key;
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return new YpfOptions { Key = last_key };
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}
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return this.GetDefaultOptions();
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}
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public override object GetAccessWidget ()
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{
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return new GUI.WidgetYPF();
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}
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uint QueryEncryptionKey ()
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{
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var args = new ParametersRequestEventArgs
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{
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Notice = arcStrings.YPFNotice,
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};
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FormatCatalog.Instance.InvokeParametersRequest (this, args);
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if (!args.InputResult)
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throw new OperationCanceledException();
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return GetOptions<YpfOptions> (args.Options).Key;
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}
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private class Parser
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{
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ArcView m_file;
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uint m_version;
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uint m_count;
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uint m_dir_size;
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public Parser (ArcView file, uint count, uint dir_size)
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{
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m_file = file;
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m_count = count;
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m_dir_size = dir_size;
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m_version = file.View.ReadUInt32 (4);
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}
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// 4-name_checksum, 1-name_count, *-name, 1-file_type
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// 1-pack_flag, 4-size, 4-packed_size, 4-offset, 4-packed_adler32
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public List<Entry> ScanDir (uint key)
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{
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uint dir_offset = 0x20;
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uint dir_remaining = m_dir_size;
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var dir = new List<Entry> ((int)m_count);
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for (uint num = 0; num < m_count; ++num)
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{
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if (dir_remaining < 0x17)
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break;
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dir_remaining -= 0x17;
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uint name_size = Decrypt ((byte)(m_file.View.ReadByte (dir_offset+4) ^ 0xff));
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if (name_size > dir_remaining)
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break;
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dir_remaining -= name_size;
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dir_offset += 5;
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if (0 == name_size)
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break;
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if (0xffffffff == key)
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{
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if (name_size < 4)
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break;
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// assume filename contains '.' and 3-characters extension.
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key = (uint)(m_file.View.ReadByte (dir_offset+name_size-4) ^ 0x2e);
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}
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byte[] raw_name = new byte[name_size];
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for (int i = 0; i < name_size; ++i)
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{
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raw_name[i] = (byte)(m_file.View.ReadByte (dir_offset) ^ key);
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++dir_offset;
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}
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string name = Encodings.cp932.GetString (raw_name);
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// 0x0F7: 0-ybn, 1-bmp, 2-png, 3-jpg, 4-gif, 5-avi, 6-wav, 7-ogg, 8-psd
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// 0x122, 0x12C, 0x196: 0-ybn, 1-bmp, 2-png, 3-jpg, 4-gif, 5-wav, 6-ogg, 7-psd
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int type_id = m_file.View.ReadByte (dir_offset);
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string type = "";
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switch (type_id)
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{
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case 0:
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type = "script";
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break;
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case 1: case 2: case 3: case 4:
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type = "image";
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break;
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case 5:
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type = 0xf7 == m_version ? "video" : "audio";
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break;
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case 6:
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case 7:
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type = "audio";
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break;
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}
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var entry = new PackedEntry { Name = name, Type = type };
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entry.IsPacked = 1 == m_file.View.ReadByte (dir_offset+1);
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entry.UnpackedSize = m_file.View.ReadUInt32 (dir_offset+2);
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entry.Size = m_file.View.ReadUInt32 (dir_offset+6);
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entry.Offset = m_file.View.ReadUInt32 (dir_offset+10);
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if (entry.CheckPlacement (m_file.MaxOffset))
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dir.Add (entry);
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dir_offset += 0x12;
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}
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return dir;
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}
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static readonly byte[] s_crypt_table = {
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0x03,0x48,0x06,0x35, // 0x122, 0x196
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0x0C,0x10,0x11,0x19,0x1C,0x1E, // 0x0F7
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0x09,0x0B,0x0D,0x13,0x15,0x1B, // 0x12C
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0x20,0x23,0x26,0x29,
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0x2C,0x2F,0x2E,0x32,
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};
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// 0xFF 0x0F7 "Four-Leaf" adler32
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// 0x34 0x122 "Neko Koi!" crc32
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// 0x28 0x12C "Suzukaze no Melt" (no recovery - 00 00 00 00)
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// 0xFF 0x196 "Mamono Musume-tachi to no Rakuen ~Slime & Scylla~"
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public uint Decrypt (byte value)
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{
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int pos = s_crypt_table.Length - 0x14;
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if (m_version >= 0x100)
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{
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pos -= 4;
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if (m_version >= 0x12c && m_version < 0x196)
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pos += 10;
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}
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pos = Array.FindIndex (s_crypt_table, pos, x => x == value);
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if (-1 == pos)
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return value;
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if (0 != (pos & 1))
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return s_crypt_table[pos-1];
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else
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return s_crypt_table[pos+1];
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}
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}
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}
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}
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