mirror of
https://github.com/crskycode/GARbro.git
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1258 lines
44 KiB
C#
1258 lines
44 KiB
C#
//! \file ArcWARC.cs
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//! \date Fri Apr 10 03:10:42 2015
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//! \brief ShiinaRio engine archive format.
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//
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// Copyright (C) 2015 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.Runtime.InteropServices;
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using System.Windows;
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using System.Windows.Media.Imaging;
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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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using ZLibNet;
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namespace GameRes.Formats.ShiinaRio
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{
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internal class WarOptions : ResourceOptions
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{
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public EncryptionScheme Scheme { get; set; }
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}
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internal class WarcEntry : PackedEntry
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{
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public long FileTime;
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public uint Flags;
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}
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internal class WarcFile : ArcFile
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{
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public readonly Decoder Decoder;
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public WarcFile (ArcView arc, ArchiveFormat impl, ICollection<Entry> dir, Decoder decoder)
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: base (arc, impl, dir)
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{
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this.Decoder = decoder;
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}
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}
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[Export(typeof(ArchiveFormat))]
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public class WarOpener : ArchiveFormat
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{
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public override string Tag { get { return "WAR"; } }
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public override string Description { get { return "ShiinaRio engine resource archive"; } }
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public override uint Signature { get { return 0x43524157; } } // 'WARC'
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public override bool IsHierarchic { get { return false; } }
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public override bool CanCreate { get { return false; } }
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public override ArcFile TryOpen (ArcView file)
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{
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if (!file.View.AsciiEqual (4, " 1."))
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return null;
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int version = file.View.ReadByte (7) - 0x30;
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version = 100 + version * 10;
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if (170 != version && 130 != version && 150 != version)
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throw new NotSupportedException ("Not supported WARC version");
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uint index_offset = 0xf182ad82u ^ file.View.ReadUInt32 (8);
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if (index_offset >= file.MaxOffset)
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return null;
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var scheme = QueryEncryption();
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if (null == scheme)
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return null;
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var decoder = new Decoder (version, scheme);
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uint max_index_len = decoder.MaxIndexLength;
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uint index_length = (uint)Math.Min (max_index_len, file.MaxOffset - index_offset);
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if (index_length < 8)
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return null;
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var enc_index = new byte[max_index_len];
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if (index_length != file.View.Read (index_offset, enc_index, 0, index_length))
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return null;
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decoder.DecryptIndex (index_offset, enc_index);
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Stream index;
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if (version >= 170)
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{
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if (0x78 != enc_index[8]) // FIXME: check if it looks like ZLib stream
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return null;
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var zindex = new MemoryStream (enc_index, 8, (int)index_length-8);
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index = new ZLibStream (zindex, CompressionMode.Decompress);
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}
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else
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{
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var unpacked = new byte[max_index_len];
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index_length = UnpackRNG (enc_index, 0, index_length, unpacked);
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if (0 == index_length)
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return null;
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index = new MemoryStream (unpacked, 0, (int)index_length);
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}
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using (var header = new BinaryReader (index))
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{
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byte[] name_buf = new byte[decoder.EntryNameSize];
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var dir = new List<Entry> ();
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while (name_buf.Length == header.Read (name_buf, 0, name_buf.Length))
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{
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var name = Binary.GetCString (name_buf, 0, name_buf.Length);
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var entry = new WarcEntry {
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Name = name,
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Type = FormatCatalog.Instance.GetTypeFromName (name)
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};
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entry.Offset = header.ReadUInt32();
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entry.Size = header.ReadUInt32();
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if (!entry.CheckPlacement (file.MaxOffset))
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return null;
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entry.UnpackedSize = header.ReadUInt32();
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entry.IsPacked = entry.Size != entry.UnpackedSize;
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entry.FileTime = header.ReadInt64();
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entry.Flags = header.ReadUInt32();
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if (0 != name.Length)
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dir.Add (entry);
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}
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if (0 == dir.Count)
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return null;
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return new WarcFile (file, this, dir, decoder);
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}
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}
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private void Dump (string name, byte[] data)
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{
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using (var dump = File.Create (name))
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dump.Write (data, 0, data.Length);
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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 warc = arc as WarcFile;
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var wentry = entry as WarcEntry;
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if (null == warc || null == wentry || entry.Size < 8)
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return arc.File.CreateStream (entry.Offset, entry.Size);
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var enc_data = new byte[entry.Size];
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if (entry.Size != arc.File.View.Read (entry.Offset, enc_data, 0, entry.Size))
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return Stream.Null;
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uint sig = LittleEndian.ToUInt32 (enc_data, 0);
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uint unpacked_size = LittleEndian.ToUInt32 (enc_data, 4);
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sig ^= (unpacked_size ^ 0x82AD82) & 0xffffff;
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if (0 != (wentry.Flags & 0x80000000u) && entry.Size > 8) // encrypted entry
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warc.Decoder.Decrypt (enc_data, 8, entry.Size-8);
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if (0 != (wentry.Flags & 0x20000000u) && entry.Size > 8)
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warc.Decoder.Decrypt2 (enc_data, 8, entry.Size-8);
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byte[] unpacked = enc_data;
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UnpackMethod unpack = null;
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switch (sig & 0xffffff)
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{
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case 0x314859: // 'YH1'
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unpack = UnpackYH1;
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break;
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case 0x4b5059: // 'YPK'
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unpack = UnpackYPK;
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break;
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case 0x5a4c59: // 'YLZ'
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unpack = UnpackYLZ;
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break;
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}
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if (null != unpack)
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{
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unpacked = new byte[unpacked_size];
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unpack (enc_data, unpacked);
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if (0 != (wentry.Flags & 0x40000000))
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{
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warc.Decoder.Decrypt2 (unpacked, 0, (uint)unpacked.Length);
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if (warc.Decoder.SchemeVersion >= 2490)
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warc.Decoder.Decrypt3 (unpacked, 0, (uint)unpacked.Length);
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}
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}
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return new MemoryStream (unpacked);
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}
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delegate void UnpackMethod (byte[] input, byte[] output);
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void UnpackYH1 (byte[] input, byte[] output)
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{
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if (0 != input[3])
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{
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uint key = 0x6393528e^0x4b4du; // 'KM'
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unsafe
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{
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fixed (byte* buf_raw = input)
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{
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uint* encoded = (uint*)buf_raw;
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int i;
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for (i = 2; i < input.Length/4; ++i)
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encoded[i] ^= key;
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}
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}
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var decoder = new HuffmanReader (input, 8, input.Length-8, output);
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decoder.Unpack();
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}
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}
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void UnpackYPK (byte[] input, byte[] output)
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{
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if (0 != input[3])
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{
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uint key = ~0x4b4d4b4du; // 'KMKM'
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unsafe
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{
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fixed (byte* buf_raw = input)
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{
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uint* encoded = (uint*)buf_raw;
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int i;
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for (i = 2; i < input.Length/4; ++i)
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encoded[i] ^= key;
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for (i *= 4; i < input.Length; ++i)
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buf_raw[i] ^= (byte)key;
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}
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}
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}
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if (0x78 != input[8])
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throw new ApplicationException ("Invalid decryption scheme");
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var src = new MemoryStream (input, 8, input.Length-8);
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using (var zlib = new ZLibStream (src, CompressionMode.Decompress))
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zlib.Read (output, 0, output.Length);
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}
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void UnpackYLZ (byte[] input, byte[] output)
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{
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if (0 != input[3])
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{
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uint key = 0x4b4d4b4du; // 'KMKM'
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unsafe
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{
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fixed (byte* buf_raw = input)
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{
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uint* encoded = (uint*)buf_raw;
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int i;
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for (i = 2; i < input.Length/4; ++i)
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encoded[i] ^= key;
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for (i *= 4; i < input.Length; ++i)
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{
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buf_raw[i] ^= (byte)key;
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key >>= 8;
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}
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}
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}
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}
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var decoder = new YlzReader (input, 8, output);
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decoder.Unpack();
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}
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uint UnpackRNG (byte[] input, int in_start, uint input_size, byte[] output)
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{
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var coder = new Kogado.CRangeCoder();
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coder.InitQSModel (257, 12, 2000, null, false);
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return coder.Decode (output, 0, (uint)output.Length, input, (uint)in_start, input_size);
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}
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public override ResourceOptions GetDefaultOptions ()
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{
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return new WarOptions {
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Scheme = GetScheme (Settings.Default.WARCScheme),
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};
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}
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public override object GetAccessWidget ()
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{
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return new GUI.WidgetWARC();
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}
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EncryptionScheme QueryEncryption ()
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{
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var options = Query<WarOptions> (arcStrings.ArcEncryptedNotice);
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return options.Scheme;
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}
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static EncryptionScheme GetScheme (string scheme)
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{
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return Decoder.KnownSchemes.Where (s => s.Name == scheme).FirstOrDefault();
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}
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}
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internal class YlzReader
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{
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byte[] m_input;
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byte[] m_output;
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int m_src;
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uint m_ctl = 0;
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uint m_mask = 0;
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public YlzReader (byte[] input, int src_offset, byte[] output)
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{
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m_input = input;
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m_src = src_offset;
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m_output = output;
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}
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bool GetCtlBit ()
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{
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bool bit = 0 != (m_ctl & m_mask);
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m_mask >>= 1;
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if (0 == m_mask)
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{
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m_ctl = LittleEndian.ToUInt32 (m_input, m_src);
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m_src += 4;
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m_mask = 0x80000000;
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}
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return bit;
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}
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int GetBits (int n)
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{
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int v = 0;
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for (int i = 0; i < n; ++i)
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{
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v <<= 1;
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if (GetCtlBit())
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v |= 1;
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}
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return v;
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}
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public void Unpack ()
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{
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GetCtlBit();
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int dst = 0;
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while (dst < m_output.Length)
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{
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if (GetCtlBit())
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{
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m_output[dst++] = m_input[m_src++];
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continue;
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}
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bool next_bit = GetCtlBit();
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int offset = m_input[m_src++] | ~0xffff;
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int ah = 0xff;
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int count = 0;
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if (next_bit) // 5e
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{
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if (GetCtlBit()) // 10d
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{
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ah = (ah << 1) | GetBits (1);
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}
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else if (GetCtlBit()) // 13e
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{
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ah = (ah << 1) | GetBits (1);
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offset -= 0x200;
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}
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else if (GetCtlBit()) // 174
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{
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ah = (ah << 2) | GetBits (2);
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offset -= 0x400;
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}
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else if (GetCtlBit()) // 1c0
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{
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ah = (ah << 3) | GetBits (3);
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offset -= 0x800;
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}
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else
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{
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ah = (ah << 4) | GetBits (4);
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offset -= 0x1000;
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}
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if (GetCtlBit()) // 296
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{
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count = 3;
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}
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else if (GetCtlBit()) // 2a2
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{
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count = 4;
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}
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else if (GetCtlBit()) // 2c2
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{
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count = 5 + GetBits (1);
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}
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else if (GetCtlBit()) // 2f8
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{
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count = 7 + GetBits (2);
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}
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else if (GetCtlBit()) // 33f
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{
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count = 0x0b + GetBits (3);
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}
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else
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{
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count = 0x13 + m_input[m_src++];
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}
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}
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else if (GetCtlBit()) // 94
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{
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ah <<= 3; // b2
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ah |= GetBits (3);
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ah = (ah - 1) & 0xff;
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count = 2;
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}
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else if (0xff == (offset & 0xff))
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{
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return;
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}
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else
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{
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count = 2;
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}
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offset += (ah & 0xff) << 8; // 280
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Binary.CopyOverlapped (m_output, dst + offset, dst, count);
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dst += count;
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}
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}
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}
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internal class HuffmanReader
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{
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byte[] m_src;
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byte[] m_dst;
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uint[] lhs = new uint[511];
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uint[] rhs = new uint[511];
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int m_origin;
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int m_total;
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int m_input_pos;
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int m_remaining;
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int m_curbits;
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uint m_cache;
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uint m_curindex;
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public HuffmanReader (byte[] src, int index, int length, byte[] dst)
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{
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m_src = src;
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m_dst = dst;
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m_origin = index;
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m_total = length;
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}
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public HuffmanReader (byte[] src, byte[] dst) : this (src, 0, src.Length, dst)
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{
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}
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public byte[] Unpack ()
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{
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m_input_pos = m_origin;
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m_remaining = m_total;
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m_curbits = 0;
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m_curindex = 256;
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uint index = CreateTree();
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for (int i = 0; i < m_dst.Length; ++i)
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{
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uint idx = index;
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while (idx >= 256)
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{
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uint is_right;
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if (--m_curbits < 0)
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{
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m_curbits = 31;
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m_cache = ReadUInt32();
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is_right = m_cache >> 31;
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}
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else
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is_right = (m_cache >> m_curbits) & 1;
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if (0 != is_right)
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idx = rhs[idx];
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else
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idx = lhs[idx];
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}
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m_dst[i] = (byte)idx;
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}
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return m_dst;
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}
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uint ReadUInt32 ()
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{
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if (0 == m_remaining)
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throw new InvalidFormatException ("Unexpected end of file");
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uint v;
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if (m_remaining >= 4)
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{
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v = LittleEndian.ToUInt32 (m_src, m_input_pos);
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m_input_pos += 4;
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m_remaining -= 4;
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}
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else
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{
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v = m_src[m_input_pos++];
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int shift = 8;
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while (--m_remaining != 0)
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{
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v |= (uint)(m_src[m_input_pos++] << shift);
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shift += 8;
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}
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}
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return v;
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}
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uint GetBits (int req_bits)
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{
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uint ret_val = 0;
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if (req_bits > m_curbits)
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{
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do
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{
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req_bits -= m_curbits;
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ret_val |= (m_cache & ((1u << m_curbits) - 1u)) << req_bits;
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m_cache = ReadUInt32();
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m_curbits = 32;
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}
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while (req_bits > 32);
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}
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m_curbits -= req_bits;
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return ret_val | ((1u << req_bits) - 1u) & (m_cache >> m_curbits);
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}
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uint CreateTree ()
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{
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uint not_leaf;
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if (m_curbits-- < 1)
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{
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m_curbits = 31;
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m_cache = ReadUInt32();
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not_leaf = m_cache >> 31;
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}
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else
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not_leaf = (m_cache >> m_curbits) & 1;
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uint i;
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if (0 != not_leaf)
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{
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i = m_curindex++;
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lhs[i] = CreateTree();
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rhs[i] = CreateTree();
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}
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else
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i = GetBits (8);
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return i;
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}
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}
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|
|
|
internal class CachedResource
|
|
{
|
|
Dictionary<string, byte[]> ResourceCache = new Dictionary<string, byte[]>();
|
|
Dictionary<string, byte[]> RegionCache = new Dictionary<string, byte[]>();
|
|
|
|
public static Stream Open (string name)
|
|
{
|
|
var assembly = typeof(CachedResource).Assembly;
|
|
var stream = assembly.GetManifestResourceStream ("GameRes.Formats.Resources." + name);
|
|
if (null == stream)
|
|
throw new FileNotFoundException ("Resource not found", name);
|
|
return stream;
|
|
}
|
|
|
|
public byte[] Load (string name)
|
|
{
|
|
byte[] res;
|
|
if (!ResourceCache.TryGetValue (name, out res))
|
|
{
|
|
using (var stream = Open (name))
|
|
{
|
|
res = new byte[stream.Length];
|
|
stream.Read (res, 0, res.Length);
|
|
ResourceCache[name] = res;
|
|
}
|
|
}
|
|
return res;
|
|
}
|
|
|
|
// FIXME: this approach disregards possible differences in regions width or height
|
|
public byte[] LoadRegion (string name, int width, int height)
|
|
{
|
|
byte[] region;
|
|
if (!RegionCache.TryGetValue (name, out region))
|
|
{
|
|
using (var png = Open (name))
|
|
{
|
|
region = new byte[width*height*4];
|
|
var decoder = new PngBitmapDecoder (png, BitmapCreateOptions.None, BitmapCacheOption.OnLoad);
|
|
var bitmap = decoder.Frames[0];
|
|
width = Math.Min (width, bitmap.PixelWidth);
|
|
height = Math.Min (height, bitmap.PixelHeight);
|
|
int stride = bitmap.PixelWidth * bitmap.Format.BitsPerPixel / 8;
|
|
Int32Rect rect = new Int32Rect (0, 0, width, height);
|
|
bitmap.CopyPixels (rect, region, stride, 0);
|
|
RegionCache[name] = region;
|
|
}
|
|
}
|
|
return region;
|
|
}
|
|
}
|
|
|
|
internal class EncryptionScheme
|
|
{
|
|
public string Name { get; set; }
|
|
public string OriginalTitle { get; set; }
|
|
public int Version { get; set; }
|
|
public int EntryNameSize;
|
|
public byte[] CryptKey;
|
|
public uint[] HelperKey { get; set; }
|
|
public byte[] ShiinaImage;
|
|
public byte[] Region;
|
|
public byte[] DecodeBin;
|
|
|
|
private static CachedResource Resource = new CachedResource();
|
|
|
|
public static readonly string DefaultCrypt = "Crypt Type 20011002 - Copyright(C) 2000 Y.Yamada/STUDIO よしくん";
|
|
public static readonly uint[] ZeroKey = new uint[] { 0, 0, 0, 0, 0 };
|
|
|
|
public static EncryptionScheme Create (string name, int version, int entry_name_size,
|
|
string key1, uint[] key2,
|
|
string image, string region_src, string decode_bin = null,
|
|
string original_title = "")
|
|
{
|
|
var scheme = new EncryptionScheme
|
|
{
|
|
Name = name,
|
|
Version = version,
|
|
OriginalTitle = original_title,
|
|
EntryNameSize = entry_name_size,
|
|
CryptKey = Encodings.cp932.GetBytes (key1),
|
|
HelperKey = key2,
|
|
ShiinaImage = Resource.Load (image),
|
|
Region = Resource.LoadRegion (region_src, 48, 48),
|
|
};
|
|
if (null != decode_bin)
|
|
scheme.DecodeBin = Resource.Load (decode_bin);
|
|
return scheme;
|
|
}
|
|
|
|
public static EncryptionScheme Create (int version, string name, string original_title, uint[] key2)
|
|
{
|
|
string decode = version < 2490 ? "DecodeV1.bin" : "DecodeV249.bin";
|
|
string image = version < 2400 ? "ShiinaRio1.png"
|
|
: version < 2490 ? "ShiinaRio3.jpg"
|
|
: "ShiinaRio4.jpg";
|
|
int entry_name_size = version < 2390 ? 0x10 : 0x20;
|
|
return Create (name, version, entry_name_size, DefaultCrypt, key2,
|
|
image, "ShiinaRio2.png", decode, original_title);
|
|
}
|
|
|
|
public static EncryptionScheme Create (int version, string name)
|
|
{
|
|
return Create (version, name, "", ZeroKey);
|
|
}
|
|
}
|
|
|
|
internal class Decoder
|
|
{
|
|
EncryptionScheme m_scheme;
|
|
|
|
public int SchemeVersion { get { return m_scheme.Version; } }
|
|
public int WarcVersion { get; private set; }
|
|
public uint MaxIndexLength { get; private set; }
|
|
public int EntryNameSize { get { return m_scheme.EntryNameSize; } }
|
|
|
|
private uint Rand { get; set; }
|
|
|
|
public Decoder (int version, EncryptionScheme scheme)
|
|
{
|
|
m_scheme = scheme;
|
|
WarcVersion = version;
|
|
MaxIndexLength = GetMaxIndexLength (version);
|
|
}
|
|
|
|
public void Decrypt (byte[] data, int index, uint data_length)
|
|
{
|
|
if (data_length < 3)
|
|
return;
|
|
uint effective_length = Math.Min (data_length, 1024u);
|
|
int a, b;
|
|
uint fac = 0;
|
|
if (WarcVersion > 120)
|
|
{
|
|
Rand = data_length;
|
|
a = (sbyte)data[index] ^ (sbyte)data_length;
|
|
b = (sbyte)data[index+1] ^ (sbyte)(data_length / 2);
|
|
if (data_length != MaxIndexLength)
|
|
{
|
|
// ... regular entry decryption
|
|
int idx = (int)((double)NextRand() * (m_scheme.ShiinaImage.Length / 4294967296.0));
|
|
if (WarcVersion >= 160)
|
|
{
|
|
fac = Rand + m_scheme.ShiinaImage[idx];
|
|
fac = DecryptHelper3 (fac) & 0xfffffff;
|
|
if (effective_length > 0x80)
|
|
{
|
|
DecryptHelper4 (data, index+4, m_scheme.HelperKey);
|
|
index += 0x80;
|
|
effective_length -= 0x80;
|
|
}
|
|
}
|
|
else if (150 == WarcVersion)
|
|
{
|
|
fac = Rand + m_scheme.ShiinaImage[idx];
|
|
fac ^= (fac & 0xfff) * (fac & 0xfff);
|
|
uint v = 0;
|
|
for (int i = 0; i < 32; ++i)
|
|
{
|
|
uint bit = fac & 1;
|
|
fac >>= 1;
|
|
if (0 != bit)
|
|
v += fac;
|
|
}
|
|
fac = v;
|
|
}
|
|
else if (140 == WarcVersion)
|
|
{
|
|
fac = m_scheme.ShiinaImage[idx];
|
|
}
|
|
else if (130 == WarcVersion)
|
|
{
|
|
fac = m_scheme.ShiinaImage[idx & 0xff];
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
a = data[index];
|
|
b = data[index+1];
|
|
}
|
|
Rand ^= (uint)(DecryptHelper1 (a) * 100000000.0);
|
|
|
|
double token = 0.0;
|
|
if (0 != (a|b))
|
|
{
|
|
token = Math.Acos ((double)a / Math.Sqrt ((double)(a*a + b*b)));
|
|
token = token / Math.PI * 180.0;
|
|
}
|
|
if (b < 0)
|
|
token = 360.0 - token;
|
|
|
|
uint x = (fac + (byte)DecryptHelper2 (token)) % (uint)m_scheme.CryptKey.Length;
|
|
int n = 0;
|
|
for (int i = 2; i < effective_length; ++i)
|
|
{
|
|
byte d = data[index+i];
|
|
if (WarcVersion > 120)
|
|
d ^= (byte)((double)NextRand() / 16777216.0);
|
|
else
|
|
d ^= (byte)((double)NextRand() / 4294967296.0); // ? effectively a no-op
|
|
d = (byte)(((d & 1) << 7) | (d >> 1));
|
|
d ^= (byte)(m_scheme.CryptKey[n++] ^ m_scheme.CryptKey[x]);
|
|
data[index+i] = d;
|
|
x = d % (uint)m_scheme.CryptKey.Length;
|
|
if (n >= m_scheme.CryptKey.Length)
|
|
n = 0;
|
|
}
|
|
}
|
|
|
|
public void DecryptIndex (uint index_offset, byte[] enc_index)
|
|
{
|
|
Decrypt (enc_index, 0, (uint)enc_index.Length);
|
|
unsafe
|
|
{
|
|
fixed (byte* buf_raw = enc_index)
|
|
{
|
|
uint* encoded = (uint*)buf_raw;
|
|
for (int i = 0; i < enc_index.Length/4; ++i)
|
|
encoded[i] ^= index_offset;
|
|
if (WarcVersion >= 170)
|
|
{
|
|
byte key = (byte)~WarcVersion;
|
|
for (int i = 0; i < enc_index.Length; ++i)
|
|
buf_raw[i] ^= key;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
public void Decrypt2 (byte[] data, int index, uint length)
|
|
{
|
|
if (length < 0x400 || null == m_scheme.DecodeBin)
|
|
return;
|
|
uint crc = 0xffffffff;
|
|
for (int i = 0; i < 0x100; ++i)
|
|
{
|
|
crc ^= (uint)data[index++] << 24;
|
|
for (int j = 0; j < 8; ++j)
|
|
{
|
|
uint bit = crc & 0x80000000u;
|
|
crc <<= 1;
|
|
if (0 != bit)
|
|
crc ^= 0x04c11db7;
|
|
}
|
|
}
|
|
for (int i = 0; i < 0x40; ++i)
|
|
{
|
|
uint src = LittleEndian.ToUInt32 (data, index) & 0x1ffcu;
|
|
src = LittleEndian.ToUInt32 (m_scheme.DecodeBin, (int)src);
|
|
uint key = src ^ crc;
|
|
data[index++ + 0x100] ^= (byte)key;
|
|
data[index++ + 0x100] ^= (byte)(key >> 8);
|
|
data[index++ + 0x100] ^= (byte)(key >> 16);
|
|
data[index++ + 0x100] ^= (byte)(key >> 24);
|
|
}
|
|
}
|
|
|
|
public void Decrypt3 (byte[] data, int index, uint length)
|
|
{
|
|
if (length < 0x400)
|
|
return;
|
|
int src = index;
|
|
uint key = 0;
|
|
for (uint i = (length & 0x7eu) + 1; i != 0; --i)
|
|
{
|
|
key ^= data[src++];
|
|
for (int j = 0; j < 8; ++j)
|
|
{
|
|
uint bit = key & 1;
|
|
key = bit << 15 | key >> 1;
|
|
if (0 == bit)
|
|
key ^= 0x408;
|
|
}
|
|
}
|
|
data[index+0x104] ^= (byte)key;
|
|
data[index+0x105] ^= (byte)(key >> 8);
|
|
}
|
|
|
|
double DecryptHelper1 (double a)
|
|
{
|
|
if (a < 0)
|
|
return -DecryptHelper1 (-a);
|
|
|
|
double v0;
|
|
double v1;
|
|
if (a < 18.0)
|
|
{
|
|
v0 = a;
|
|
v1 = a;
|
|
double v2 = -(a * a);
|
|
|
|
for (int j = 3; j < 1000; j += 2)
|
|
{
|
|
v1 *= v2 / (j * (j - 1));
|
|
v0 += v1 / j;
|
|
if (v0 == v2)
|
|
break;
|
|
}
|
|
return v0;
|
|
}
|
|
|
|
int flags = 0;
|
|
double v0_l = 0;
|
|
v1 = 0;
|
|
double div = 1 / a;
|
|
double v1_h = 2.0;
|
|
double v0_h = 2.0;
|
|
double v1_l = 0;
|
|
v0 = 0;
|
|
int i = 0;
|
|
|
|
do
|
|
{
|
|
v0 += div;
|
|
div *= ++i / a;
|
|
if (v0 < v0_h)
|
|
v0_h = v0;
|
|
else
|
|
flags |= 1;
|
|
|
|
v1 += div;
|
|
div *= ++i / a;
|
|
if (v1 < v1_h)
|
|
v1_h = v1;
|
|
else
|
|
flags |= 2;
|
|
|
|
v0 -= div;
|
|
div *= ++i / a;
|
|
if (v0 > v0_l)
|
|
v0_l = v0;
|
|
else
|
|
flags |= 4;
|
|
|
|
v1 -= div;
|
|
div *= ++i / a;
|
|
if (v1 > v1_l)
|
|
v1_l = v1;
|
|
else
|
|
flags |= 8;
|
|
}
|
|
while (flags != 0xf);
|
|
|
|
return ((Math.PI - Math.Cos(a) * (v0_l + v0_h)) - (Math.Sin(a) * (v1_l + v1_h))) / 2.0;
|
|
}
|
|
|
|
uint DecryptHelper2 (double a)
|
|
{
|
|
double v0, v1, v2, v3;
|
|
|
|
if (a > 1.0)
|
|
{
|
|
v0 = Math.Sqrt (a * 2 - 1);
|
|
for (;;)
|
|
{
|
|
v1 = 1 - (double)NextRand() / 4294967296.0;
|
|
v2 = 2.0 * (double)NextRand() / 4294967296.0 - 1.0;
|
|
if (v1 * v1 + v2 * v2 > 1.0)
|
|
continue;
|
|
|
|
v2 /= v1;
|
|
v3 = v2 * v0 + a - 1.0;
|
|
if (v3 <= 0)
|
|
continue;
|
|
|
|
v1 = (a - 1.0) * Math.Log (v3 / (a - 1.0)) - v2 * v0;
|
|
if (v1 < -50.0)
|
|
continue;
|
|
|
|
if (((double)NextRand() / 4294967296.0) <= (Math.Exp(v1) * (v2 * v2 + 1.0)))
|
|
break;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
v0 = Math.Exp(1.0) / (a + Math.Exp(1.0));
|
|
do
|
|
{
|
|
v1 = (double)NextRand() / 4294967296.0;
|
|
v2 = (double)NextRand() / 4294967296.0;
|
|
if (v1 < v0)
|
|
{
|
|
v3 = Math.Pow(v2, 1.0 / a);
|
|
v1 = Math.Exp(-v3);
|
|
} else
|
|
{
|
|
v3 = 1.0 - Math.Log(v2);
|
|
v1 = Math.Pow(v3, a - 1.0);
|
|
}
|
|
}
|
|
while ((double)NextRand() / 4294967296.0 >= v1);
|
|
}
|
|
|
|
if (WarcVersion > 120)
|
|
return (uint)(v3 * 256.0);
|
|
else
|
|
return (byte)((double)NextRand() / 4294967296.0);
|
|
}
|
|
|
|
[StructLayout(LayoutKind.Explicit)]
|
|
struct Union
|
|
{
|
|
[FieldOffset(0)]
|
|
public int i;
|
|
[FieldOffset (0)]
|
|
public uint u;
|
|
[FieldOffset(0)]
|
|
public float f;
|
|
[FieldOffset(0)]
|
|
public byte b0;
|
|
[FieldOffset(1)]
|
|
public byte b1;
|
|
[FieldOffset(2)]
|
|
public byte b2;
|
|
[FieldOffset(3)]
|
|
public byte b3;
|
|
}
|
|
|
|
uint DecryptHelper3 (uint key)
|
|
{
|
|
var p = new Union();
|
|
p.u = key;
|
|
var fv = new Union();
|
|
fv.f = (float)(1.5 * (double)p.b0 + 0.1);
|
|
uint v0 = Binary.BigEndian (fv.u);
|
|
fv.f = (float)(1.5 * (double)p.b1 + 0.1);
|
|
uint v1 = (uint)fv.f;
|
|
fv.f = (float)(1.5 * (double)p.b2 + 0.1);
|
|
uint v2 = (uint)-fv.i;
|
|
fv.f = (float)(1.5 * (double)p.b3 + 0.1);
|
|
uint v3 = ~fv.u;
|
|
|
|
return ((v0 + v1) | (v2 - v3));
|
|
}
|
|
|
|
void DecryptHelper4 (byte[] data, int index, uint[] key_src)
|
|
{
|
|
uint[] buf = new uint[0x50];
|
|
int i;
|
|
for (i = 0; i < 0x10; ++i)
|
|
{
|
|
buf[i] = BigEndian.ToUInt32 (data, index+40+4*i);
|
|
}
|
|
for (; i < 0x50; ++i)
|
|
{
|
|
uint v = buf[i-16];
|
|
v ^= buf[i-14];
|
|
v ^= buf[i-8];
|
|
v ^= buf[i-3];
|
|
v = v << 1 | v >> 31;
|
|
buf[i] = v;
|
|
}
|
|
uint[] key = new uint[10];
|
|
Array.Copy (key_src, key, 5);
|
|
uint k0 = key[0];
|
|
uint k1 = key[1];
|
|
uint k2 = key[2];
|
|
uint k3 = key[3];
|
|
uint k4 = key[4];
|
|
|
|
uint pc = 0;
|
|
uint v26 = 0;
|
|
int buf_idx = 0;
|
|
for (int ebp = 0; ebp < 0x50; ++ebp)
|
|
{
|
|
if (ebp >= 0x10)
|
|
{
|
|
if (ebp >= 0x20)
|
|
{
|
|
if (ebp >= 0x30)
|
|
{
|
|
uint v27 = ~k3;
|
|
if (ebp >= 0x40)
|
|
{
|
|
v26 = k1 ^ (k2 | v27);
|
|
pc = 0xA953FD4E;
|
|
}
|
|
else
|
|
{
|
|
v26 = k1 & k3 | k2 & v27;
|
|
pc = 0x8F1BBCDC;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
v26 = k3 ^ (k1 | ~k2);
|
|
pc = 0x6ED9EBA1;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
v26 = k1 & k2 | k3 & ~k1;
|
|
pc = 0x5A827999;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
v26 = k1 ^ k2 ^ k3;
|
|
pc = 0;
|
|
}
|
|
uint v28 = buf[buf_idx] + k4 + v26 + pc + (k0 << 5 | k0 >> 27);
|
|
uint v29 = (k1 >> 2) | (k1 << 30);
|
|
k1 = k0;
|
|
k4 = k3;
|
|
k3 = k2;
|
|
k2 = v29;
|
|
k0 = v28;
|
|
++buf_idx;
|
|
}
|
|
key[0] += k0;
|
|
key[1] += k1;
|
|
key[2] += k2;
|
|
key[3] += k3;
|
|
key[4] += k4;
|
|
var ft = new FILETIME {
|
|
DateTimeLow = key[1],
|
|
DateTimeHigh = key[0] & 0x7FFFFFFF
|
|
};
|
|
var sys_time = new SYSTEMTIME (ft);
|
|
key[5] = (uint)(sys_time.Year | sys_time.Month << 16);
|
|
key[7] = (uint)(sys_time.Hour | sys_time.Minute << 16);
|
|
key[8] = (uint)(sys_time.Second | sys_time.Milliseconds << 16);
|
|
|
|
uint flags = LittleEndian.ToUInt32 (data, index+40) | 0x80000000;
|
|
// uint rgb = BigEndian.ToUInt32 (data, index+44) >> 8;
|
|
uint rgb = buf[1] >> 8;
|
|
if (0 == (flags & 0x78000000))
|
|
flags |= 0x98000000;
|
|
key[6] = RegionCrc32 (m_scheme.Region, flags, rgb);
|
|
key[9] = (uint)(((int)key[2] * (long)(int)key[3]) >> 8);
|
|
if (m_scheme.Version >= 2390)
|
|
key[6] += key[9];
|
|
unsafe
|
|
{
|
|
fixed (byte* data_fixed = data)
|
|
{
|
|
uint* encoded = (uint*)(data_fixed+index);
|
|
for (i = 0; i < 10; ++i)
|
|
{
|
|
encoded[i] ^= key[i];
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static readonly uint[] CustomCrcTable = InitCrcTable();
|
|
|
|
static uint[] InitCrcTable ()
|
|
{
|
|
var table = new uint[0x100];
|
|
for (uint i = 0; i != 256; ++i)
|
|
{
|
|
uint poly = i;
|
|
for (int j = 0; j < 8; ++j)
|
|
{
|
|
uint bit = poly & 1;
|
|
poly = poly >> 1 | poly << 31; // ror 1
|
|
if (0 == bit)
|
|
poly ^= 0x6DB88320;
|
|
}
|
|
table[i] = poly;
|
|
}
|
|
return table;
|
|
}
|
|
|
|
uint RegionCrc32 (byte[] src, uint flags, uint rgb)
|
|
{
|
|
int src_alpha = (int)flags & 0x1ff;
|
|
int dst_alpha = (int)(flags >> 12) & 0x1ff;
|
|
flags >>= 24;
|
|
if (0 == (flags & 0x10))
|
|
dst_alpha = 0;
|
|
if (0 == (flags & 8))
|
|
src_alpha = 0x100;
|
|
int y_step = 0;
|
|
int x_step = 4;
|
|
int width = 48;
|
|
int pos = 0;
|
|
if (0 != (flags & 0x40)) // horizontal flip
|
|
{
|
|
y_step += width;
|
|
pos += (width-1)*4;
|
|
x_step = -x_step;
|
|
}
|
|
if (0 != (flags & 0x20)) // vertical flip
|
|
{
|
|
y_step -= width;
|
|
pos += width*0x2f*4; // width*(height-1)*4;
|
|
}
|
|
y_step <<= 3;
|
|
uint checksum = 0;
|
|
for (int y = 0; y < 48; ++y)
|
|
{
|
|
for (int x = 0; x < 48; ++x)
|
|
{
|
|
int alpha = src[pos+3] * src_alpha;
|
|
alpha >>= 8;
|
|
uint color = rgb;
|
|
for (int i = 0; i < 3; ++i)
|
|
{
|
|
int v = src[pos+i];
|
|
int c = (int)(color & 0xff); // rgb[i];
|
|
c -= v;
|
|
c = (c * dst_alpha) >> 8;
|
|
c = (c + v) & 0xff;
|
|
c = (c * alpha) >> 8;
|
|
checksum = (checksum >> 8) ^ CustomCrcTable[(c ^ checksum) & 0xff];
|
|
color >>= 8;
|
|
}
|
|
pos += x_step;
|
|
}
|
|
pos += y_step;
|
|
}
|
|
return checksum;
|
|
}
|
|
|
|
[StructLayout(LayoutKind.Sequential)]
|
|
private struct FILETIME
|
|
{
|
|
public uint DateTimeLow;
|
|
public uint DateTimeHigh;
|
|
}
|
|
|
|
[StructLayout(LayoutKind.Sequential)]
|
|
private struct SYSTEMTIME
|
|
{
|
|
[MarshalAs(UnmanagedType.U2)] public ushort Year;
|
|
[MarshalAs(UnmanagedType.U2)] public ushort Month;
|
|
[MarshalAs(UnmanagedType.U2)] public ushort DayOfWeek;
|
|
[MarshalAs(UnmanagedType.U2)] public ushort Day;
|
|
[MarshalAs(UnmanagedType.U2)] public ushort Hour;
|
|
[MarshalAs(UnmanagedType.U2)] public ushort Minute;
|
|
[MarshalAs(UnmanagedType.U2)] public ushort Second;
|
|
[MarshalAs(UnmanagedType.U2)] public ushort Milliseconds;
|
|
|
|
public SYSTEMTIME (FILETIME ft)
|
|
{
|
|
FileTimeToSystemTime (ref ft, out this);
|
|
}
|
|
|
|
[DllImport ("kernel32.dll", CallingConvention = CallingConvention.Winapi, SetLastError = true)]
|
|
static extern bool FileTimeToSystemTime (ref FILETIME lpFileTime, out SYSTEMTIME lpSystemTime);
|
|
}
|
|
|
|
uint NextRand ()
|
|
{
|
|
Rand = 1566083941u * Rand + 1u;
|
|
return Rand;
|
|
}
|
|
|
|
uint GetMaxIndexLength (int version)
|
|
{
|
|
int max_index_entries = version < 150 ? 8192 : 16384;
|
|
return (uint)((m_scheme.EntryNameSize + 0x18) * max_index_entries);
|
|
}
|
|
|
|
public static EncryptionScheme[] KnownSchemes = new EncryptionScheme[]
|
|
{
|
|
EncryptionScheme.Create (2360, "ShiinaRio v2.36 and older"),
|
|
EncryptionScheme.Create (2480, "Bloody Rondo", "BLOODY†RONDO",
|
|
new uint[] { 0xFBFBF8F6, 0xFBE6EDF0, 0xFBF0FA, 0, 0 }),
|
|
EncryptionScheme.Create (2450, "Chuuchuu Nurse", "ちゅうちゅうナース",
|
|
new uint[] { 0xB0D1ECD1, 0xECD1F7D1, 0xF7D1B0D1, 0x08D23AD0, 0x13D20BD0 }),
|
|
EncryptionScheme.Create (2370, "Classmate no Okaa-san", "クラスメイトのお母さん",
|
|
new uint[] { 0xF182C682, 0xE882AA82, 0x718E5896, 0x8183CC82, 0xDAC98283 }),
|
|
EncryptionScheme.Create (2470, "Damatte Watashi no Muko ni Nare!", "黙って私のムコになれ！",
|
|
new uint[] { 0x44075C13, 0x010B4107, 0x05064907, 0x4C07D706, 0x6F074D07 }),
|
|
EncryptionScheme.Create (2470, "Hana to Otome ni Shukufuku wo Royal Bouquet", "花と乙女に祝福を ロイヤルブーケ",
|
|
new uint[] { 0xE3A7F1AC, 0xB2AA96AC, 0x4FAAECA7, 0xD5A7BAB0, 0x44A754A7 }),
|
|
EncryptionScheme.Create (2400, "Helter Skelter", "ヘルタースケルター",
|
|
new uint[] { 0x747C887C, 0xA47EA17C, 0xAF7CA77C, 0xA17C747C, 0x0000A47E }),
|
|
EncryptionScheme.Create (2470, "Mahou Shoujo no Taisetsu na Koto", "魔法少女の大切なこと。",
|
|
new uint[] { 0x51879387, 0x869EBC9E, 0xF480DD93, 0xD993C981, 0xD793A093 }),
|
|
EncryptionScheme.Create (2460, "Mikoko", "みここ",
|
|
new uint[] { 0x7DAC51AC, 0x51AC7DAC, 0x7DAC7DAC, 0x7DAC51AC, 0x51AC7DAC }),
|
|
EncryptionScheme.Create (2390, "Nagagutsu wo Haita Deco", "長靴をはいたデコ",
|
|
new uint[] { 0x486D887E, 0x0F7DBC73, 0x5D7D327D, 0x997C427D, 0x877EAD7C }),
|
|
EncryptionScheme.Create (2470, "Nakadashi Trilogy", "なかだしトリロジー",
|
|
new uint[] { 0x928ADB9E, 0xB087BB87, 0x928ADB9E, 0xB087BB87, 0xB087BB87 }),
|
|
EncryptionScheme.Create (2470, "Onedari Onapet", "おねだりオナペット",
|
|
new uint[] { 0xD59CB69C, 0xF69CA09C, 0x779D579D, 0x7C9D679D, 0x0000799D }),
|
|
EncryptionScheme.Create (2480, "Onegan!", "おねガン！",
|
|
new uint[] { 0xC881AB81, 0x90804880, 0xAB814A82, 0x4880C881, 0x4A829080 }),
|
|
EncryptionScheme.Create (2470, "Oreimo Plus", "俺妹プラス",
|
|
new uint[] { 0x24371528, 0x2822D722, 0x1528F922, 0xD7222437, 0xF9222822 }),
|
|
EncryptionScheme.Create (2470, "Pure Love!", "ぴゅあらっ！",
|
|
new uint[] { 0x31500050, 0x35507250, 0x87821350, 0x9D9E9780, 0x00009784 }),
|
|
EncryptionScheme.Create (2470, "Ren'ai Saimin", "恋愛催眠",
|
|
new uint[] { 0x6E423C5D, 0x7A5C0947, 0x6E423C5D, 0x7A5C0947, 0x6E423C5D }),
|
|
EncryptionScheme.Create (2480, "Sensei! Shite Ageru", "先生っ！ シてあげる",
|
|
new uint[] { 0x70562056, 0x87470744, 0x02449045, 0x76446644, 0x8F472F44 }),
|
|
EncryptionScheme.Create (2480, "Tanetsuke Mura", "種憑け村",
|
|
new uint[] { 0x7C7C7967, 0x7965574F, 0x4F69647C, 0x00005144, 0 }),
|
|
EncryptionScheme.Create (2470, "You~Gaku", "よう∽ガク",
|
|
new uint[] { 0x4DE2AB4D, 0x98AB5D46, 0x66496349, 0x485D685D, 0x5F4D4C5D }),
|
|
EncryptionScheme.Create (2410, "Zansho Omimai Moushiagemasu", "残暑お見舞い申し上げます。",
|
|
new uint[] { 0x3A123012, 0x6C3A6C36, 0x3C36323C, 0x6C360F16, 0x369DD012 }),
|
|
EncryptionScheme.Create ("ShiinaRio v2.49", 2490, 0x20, EncryptionScheme.DefaultCrypt,
|
|
new uint[] { 0x4B535453, 0xA15FA15F, 0, 0, 0 },
|
|
"ShiinaRio4.jpg", "ShiinaRio2.png", "DecodeV249.bin"),
|
|
};
|
|
}
|
|
}
|