mirror of
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426 lines
19 KiB
C#
426 lines
19 KiB
C#
//! \file ArcNPA.cs
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//! \date Fri Jul 18 04:07:42 2014
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//! \brief NPA archive 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.ComponentModel.Composition;
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using System.Collections.Generic;
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using System.Runtime.InteropServices;
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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 NpaEntry : PackedEntry
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{
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public byte[] RawName;
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}
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public class NpaArchive : ArcFile
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{
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public NpaTitleId GameId { get; private set; }
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public int Key { get; private set; }
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public byte[] KeyTable { get { return m_key_table.Value; } }
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private Lazy<byte[]> m_key_table;
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public NpaArchive (ArcView arc, ArchiveFormat impl, ICollection<Entry> dir,
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NpaTitleId game_id, int key)
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: base (arc, impl, dir)
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{
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GameId = game_id;
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Key = key;
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m_key_table = new Lazy<byte[]> (() => NpaOpener.GenerateKeyTable (game_id));
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}
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}
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public enum NpaTitleId
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{
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NotEncrypted,
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CHAOSHEAD, CHAOSHEADTR1, CHAOSHEADTR2, MURAMASATR, MURAMASA, SUMAGA, DJANGO, DJANGOTR,
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LAMENTO, LAMENTOTR, SWEETPOOL, SUMAGASP, DEMONBANE, MURAMASAAD, AXANAEL, KIKOKUGAI, SONICOMITR2,
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SUMAGA3P, SONICOMI, LOSTX, LOSTXTRAILER, DRAMATICALMURDER, TOTONO, PHENOMENO, NEKODA,
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}
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public class NpaOptions : ResourceOptions
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{
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public NpaTitleId TitleId { get; set; }
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}
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[Export(typeof(ArchiveFormat))]
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public class NpaOpener : ArchiveFormat
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{
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public override string Tag { get { return "NPA"; } }
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public override string Description { get { return arcStrings.NPADescription; } }
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public override uint Signature { get { return 0x0141504e; } } // NPA\x01
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public override bool IsHierarchic { get { return true; } }
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/// <summary>Known encryption schemes.</summary>
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public static readonly string[] KnownSchemes = new string[] {
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arcStrings.ArcNoEncryption,
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"Chaos;Head", "Chaos;Head Trial 1", "Chaos;Head Trial 2", "Muramasa Trial", "Muramasa",
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"Sumaga", "Zoku Satsuriku no Django", "Zoku Satsuriku no Django Trial", "Lamento",
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"Lamento Trial", "Sweet Pool", "Sumaga Special", "Demonbane", "MuramasaAD", "Axanael",
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"Kikokugai", "Sonicomi Trial 2", "Sumaga 3% Trial", "Sonicomi Version 1.0",
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"Guilty Crown Lost Xmas", "Guilty Crown Lost Xmas Trailer", "DRAMAtical Murder",
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"Kimi to Kanojo to Kanojo no Koi", "Phenomeno", "Nekoda -Nyanda-",
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};
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public override ArcFile TryOpen (ArcView file)
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{
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int key1 = file.View.ReadInt32 (7);
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int key2 = file.View.ReadInt32 (11);
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bool compressed = 0 != file.View.ReadByte (15);
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bool encrypted = 0 != file.View.ReadByte (16);
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int total_count = file.View.ReadInt32 (17);
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int folder_count = file.View.ReadInt32 (21);
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int file_count = file.View.ReadInt32 (25);
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if (total_count < folder_count + file_count)
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return null;
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uint dir_size = file.View.ReadUInt32 (37);
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if (dir_size >= file.MaxOffset)
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return null;
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var game_id = NpaTitleId.NotEncrypted;
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if (encrypted)
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game_id = QueryGameEncryption();
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int key;
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if (encrypted && (game_id == NpaTitleId.LAMENTO || game_id == NpaTitleId.LAMENTOTR))
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key = key1 + key2;
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else
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key = key1 * key2;
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long cur_offset = 41;
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var dir = new List<Entry> (file_count);
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for (int i = 0; i < total_count; ++i)
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{
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int name_size = file.View.ReadInt32 (cur_offset);
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if ((uint)name_size >= dir_size)
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return null;
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int type = file.View.ReadByte (cur_offset+4+name_size);
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if (1 != type) // ignore directory entries
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{
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var raw_name = new byte[name_size];
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file.View.Read (cur_offset+4, raw_name, 0, (uint)name_size);
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for (int x = 0; x < name_size; ++x)
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raw_name[x] += DecryptName (x, i, key);
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var info_offset = cur_offset + 5 + name_size;
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uint id = file.View.ReadUInt32 (info_offset);
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uint offset = file.View.ReadUInt32 (info_offset+4);
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uint size = file.View.ReadUInt32 (info_offset+8);
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uint unpacked_size = file.View.ReadUInt32 (info_offset+12);
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var entry = new NpaEntry {
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Name = Encodings.cp932.GetString (raw_name),
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Offset = dir_size+offset+41,
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Size = size,
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UnpackedSize = unpacked_size,
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IsPacked = compressed,
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RawName = raw_name,
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};
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entry.Type = FormatCatalog.Instance.GetTypeFromName (entry.Name);
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dir.Add (entry);
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}
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cur_offset += 4 + name_size + 17;
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}
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if (game_id != NpaTitleId.NotEncrypted)
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return new NpaArchive (file, this, dir, game_id, key);
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else
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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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if (arc is NpaArchive && entry is NpaEntry)
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return OpenEncryptedEntry (arc as NpaArchive, entry as NpaEntry);
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var input = arc.File.CreateStream (entry.Offset, entry.Size);
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return UnpackEntry (input, entry);
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}
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private Stream UnpackEntry (Stream input, Entry entry)
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{
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if (entry.Type != "image")
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{
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var npa_entry = entry as PackedEntry;
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if (null != npa_entry && npa_entry.IsPacked)
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return new ZLibStream (input, CompressionMode.Decompress);
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}
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return input;
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}
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private Stream OpenEncryptedEntry (NpaArchive arc, NpaEntry entry)
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{
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int key = GetKeyFromEntry (entry, arc.GameId, arc.Key);
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int encrypted_length = 0x1000;
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if (arc.GameId != NpaTitleId.LAMENTO && arc.GameId != NpaTitleId.LAMENTOTR)
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encrypted_length += entry.RawName.Length;
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using (var view = arc.File.CreateViewAccessor (entry.Offset, entry.Size))
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{
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byte[] buffer = new byte[entry.Size];
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unsafe
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{
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byte* src = view.GetPointer (entry.Offset);
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try
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{
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int x;
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for (x = 0; x < entry.Size && x < encrypted_length; x++)
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{
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if (arc.GameId == NpaTitleId.LAMENTO || arc.GameId == NpaTitleId.LAMENTOTR)
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{
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buffer[x] = (byte)(arc.KeyTable[src[x]] - key);
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}
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else if (arc.GameId == NpaTitleId.TOTONO)
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{
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byte r = src[x];
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r = arc.KeyTable[r];
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r = arc.KeyTable[r];
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r = arc.KeyTable[r];
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r = (byte)~r;
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buffer[x] = (byte)((sbyte)r - key - x);
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}
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else
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{
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buffer[x] = (byte)(arc.KeyTable[src[x]] - key - x);
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}
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}
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if (x != entry.Size)
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Marshal.Copy ((IntPtr)(src+x), buffer, x, (int)(entry.Size-x));
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} finally {
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view.SafeMemoryMappedViewHandle.ReleasePointer();
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}
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}
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return UnpackEntry (new MemoryStream (buffer, false), entry);
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}
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}
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byte DecryptName (int index, int curfile, int arc_key)
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{
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int key = 0xFC*index;
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key -= arc_key >> 0x18;
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key -= arc_key >> 0x10;
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key -= arc_key >> 0x08;
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key -= arc_key & 0xff;
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key -= curfile >> 0x18;
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key -= curfile >> 0x10;
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key -= curfile >> 0x08;
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key -= curfile;
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return (byte)(key & 0xff);
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}
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byte GetKeyFromEntry (NpaEntry entry, NpaTitleId game_id, int key2)
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{
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int key1;
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switch (game_id)
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{
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case NpaTitleId.AXANAEL:
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case NpaTitleId.KIKOKUGAI:
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case NpaTitleId.SONICOMITR2:
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case NpaTitleId.SONICOMI:
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case NpaTitleId.LOSTX:
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case NpaTitleId.DRAMATICALMURDER:
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key1 = 0x20101118;
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break;
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case NpaTitleId.TOTONO:
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key1 = 0x12345678;
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break;
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default:
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key1 = unchecked((int)0x87654321);
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break;
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}
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var name = entry.RawName;
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int i;
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for (i = 0; i < name.Length; ++i)
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key1 -= name[i];
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int key = key1 * i;
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if (game_id != NpaTitleId.LAMENTO && game_id != NpaTitleId.LAMENTOTR) // if the game is not Lamento
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{
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key += key2;
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key *= (int)entry.UnpackedSize;
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}
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return (byte)(key & 0xff);
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}
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public static byte[] GenerateKeyTable (NpaTitleId title_id)
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{
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int index = (int)title_id;
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if (index < 0 || index >= OrderTable.Length)
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throw new ArgumentOutOfRangeException ("title_id", "Invalid title id specified");
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byte[] order = OrderTable[index];
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if (null == order)
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throw new ArgumentException ("Encryption key table not defined", "title_id");
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var table = new byte[256];
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for (int i = 0; i < 256; ++i)
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{
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int edx = i << 4;
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int dl = (edx + order[i & 0x0f]) & 0xff;
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int dh = (edx + (order[i>>4] << 8)) & 0xff00;
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edx = (dh | dl) >> 4;
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var eax = BaseTable[i];
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table[eax] = (byte)(edx & 0xff);
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}
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for (int i = 16; i+1 < order.Length; i+=2)
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{
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int ecx = order[i];
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int edx = order[i+1];
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byte tmp = table[ecx];
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table[ecx] = table[edx];
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table[edx] = tmp;
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}
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return table;
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}
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public override ResourceOptions GetDefaultOptions ()
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{
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return new NpaOptions { TitleId = Settings.Default.NPAScheme };
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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.WidgetNPA;
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if (null != widget)
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{
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NpaTitleId scheme = GetTitleId (widget.GetScheme());
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Settings.Default.NPAScheme = scheme;
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return new NpaOptions { TitleId = scheme };
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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.WidgetNPA();
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}
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NpaTitleId QueryGameEncryption ()
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{
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var args = new ParametersRequestEventArgs
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{
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Notice = arcStrings.ArcEncryptedNotice,
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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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var options = GetOptions<NpaOptions> (args.Options);
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return options.TitleId;
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}
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public static NpaTitleId GetTitleId (string title)
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{
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var index = Array.IndexOf (KnownSchemes, title);
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if (index != -1)
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return (NpaTitleId)index;
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else
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return NpaTitleId.NotEncrypted;
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}
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static readonly byte[] BaseTable = {
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0x6F,0x05,0x6A,0xBF,0xA1,0xC7,0x8E,0xFB,0xD4,0x2F,0x80,0x58,0x4A,0x17,0x3B,0xB1,
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0x89,0xEC,0xA0,0x9F,0xD3,0xFC,0xC2,0x04,0x68,0x03,0xF3,0x25,0xBE,0x24,0xF1,0xBD,
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0xB8,0x41,0xC9,0x27,0x0E,0xA3,0xD8,0x7F,0x5B,0x8F,0x16,0x49,0xAA,0xB2,0x18,0xA7,
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0x33,0xE4,0xDB,0x48,0xCA,0xDE,0xAE,0xCD,0x13,0x1F,0x15,0x2E,0x39,0xF5,0x1E,0xDD,
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0x0F,0x88,0x4C,0x98,0x36,0xB4,0x3F,0x09,0x83,0xFD,0x32,0xBA,0x14,0x30,0x7A,0x63,
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0xB9,0x56,0x95,0x61,0xCC,0x8B,0xEF,0xDA,0xE5,0x2C,0xDC,0x12,0x1A,0x67,0x23,0x50,
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0xD1,0xC3,0x7E,0x6D,0xB6,0x90,0x3C,0xB3,0x0B,0xE2,0x91,0x70,0xA8,0xDF,0x44,0xC4,
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0xF4,0x01,0x5C,0x10,0x06,0xE7,0x54,0x40,0x43,0x72,0x38,0xBC,0xE3,0x07,0xFA,0x34,
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0x02,0xA4,0xF7,0x74,0xA9,0x4D,0x42,0xA5,0x85,0x35,0x79,0xD2,0x76,0x97,0x45,0x4F,
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0x08,0x5A,0xB0,0xEE,0x51,0x73,0x69,0x9E,0x94,0x47,0x77,0x29,0xD9,0x64,0x11,0xEB,
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0x37,0xAC,0x20,0x62,0x9A,0x6B,0x9C,0x75,0x22,0x87,0xAB,0x78,0x53,0xC8,0x5D,0xAD,
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0x2A,0xF2,0xCB,0xB7,0x0D,0xED,0x86,0x55,0xFF,0x19,0x57,0xD7,0xD5,0x60,0xC6,0x3D,
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0xEA,0xC1,0x6C,0xE1,0xC0,0x65,0x84,0xC5,0xE0,0x3E,0x7D,0x28,0x66,0xAF,0x1C,0x9B,
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0xCF,0x81,0x4E,0x26,0x59,0x2B,0x5F,0x7B,0xE8,0x8D,0x52,0x7C,0xF8,0x82,0x0C,0xF9,
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0x8C,0xE9,0xB5,0xE6,0x31,0x93,0x46,0x5E,0x1D,0x1B,0x4B,0x71,0xD6,0x92,0x3A,0xA6,
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0x2D,0x00,0x9D,0xBB,0x6E,0xF0,0x99,0xCE,0x21,0x0A,0xD0,0xF6,0xFE,0xA2,0x8A,0x96,
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};
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static readonly byte[][] OrderTable = {
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null, // NotEncrypted
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// CHAOSHEAD
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new byte[] { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },
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// CHAOSHEADTR1
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new byte[] { 0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0x1e,0x4e,0x66,0xb6 },
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// CHAOSHEADTR2
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new byte[] { 0x05,0x05,0x05,0x05,0x05,0x0b,0x0b,0x0b,0x0b,0x0b,0x00,0x00,0x00,0x00,0x00,0x00 },
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// MURAMASATR
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new byte[] { 0x3c,0xe0,0x2e,0x2f,0x20,0x2e,0x2f,0x20,0x8e,0x80,0x80,0xf2,0xf2,0xf2,0xfa,0xfc },
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// MURAMASA
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new byte[] { 0x35,0x70,0x2e,0x66,0x67,0x65,0x66,0x67,0x85,0x89,0x89,0x3b,0x3b,0x8b,0x81,0x85 },
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// SUMAGA
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new byte[] { 0x3c,0xe0,0x2e,0x2f,0x2f,0x2f,0x2f,0x20,0x8e,0x8f,0x8f,0xf2,0xf2,0xf2,0xfc,0xfc },
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// DJANGO
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new byte[] { 0xee,0xee,0xee,0xee,0xee,0xee,0xee,0xee,0xee,0xee,0xee,0xee,0xee,0xee,0xee,0xee,0x1e,0x4e,0x66,0xb6 },
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// DJANGOTR
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new byte[] { 0xed,0xee,0xee,0xef,0xed,0xee,0xee,0xee,0xfe,0xde,0xee,0xef,0xed,0xee,0xfe,0xdf,0x1e,0x4e,0x66,0xb6 },
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// LAMENTO
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new byte[] { 0xee,0xee,0xee,0xee,0xee,0xee,0xee,0xee,0xee,0xee,0xee,0xee,0xee,0xee,0xee,0xee,0x1e,0x4e,0x66,0xb6 },
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// LAMENTOTR
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new byte[] { 0xee,0xee,0xee,0xee,0xee,0xee,0xee,0xee,0xee,0xee,0xee,0xee,0xee,0xee,0xee,0xee,0x1e,0x4e,0x66,0xb6 },
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// SWEETPOOL
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new byte[] { 0x38,0x9c,0x2a,0x8b,0x8b,0x8b,0x8b,0x8c,0x8a,0x8b,0x8b,0xae,0xae,0xae,0xa8,0xa8 },
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// SUMAGASP
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new byte[] { 0xab,0x6f,0x9d,0x9e,0x9f,0x9d,0x9e,0xaf,0x8d,0xff,0xff,0x71,0x71,0x71,0x79,0x7b },
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// DEMONBANE
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new byte[] { 0x96,0xb9,0x47,0x48,0x99,0x97,0x9c,0xaa,0x88,0xca,0xea,0x73,0x73,0x7b,0xc9,0xc6 },
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// MURAMASAAD
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new byte[] { 0x00,0x04,0x04,0x68,0x68,0x68,0x68,0x68,0x6f,0x6f,0x9f,0x96,0x96,0x96,0x96,0x9b },
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// AXANAEL
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new byte[] { 0x08,0x0c,0x0c,0xc0,0xf0,0xf0,0xf0,0xf0,0xf7,0xf7,0xf7,0xfe,0xfe,0xfe,0xfe,0xf3 },
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// KIKOKUGAI
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new byte[] { 0x0f,0x07,0x07,0x90,0xf7,0xf7,0xf7,0xf7,0xf2,0x47,0x47,0x49,0xc9,0xc9,0xc9,0xc3 },
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// SONICOMITR2
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new byte[] { 0x08,0x0a,0x0a,0x40,0xfa,0xfa,0x50,0x50,0x55,0xf7,0xf7,0xf9,0x29,0x2c,0x7c,0x73 },
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// SUMAGA3P
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new byte[] { 0x0f,0xef,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff },
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// SONICOMI
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new byte[] { 0x0e,0x0b,0x0e,0x77,0x2e,0x2e,0x80,0x86,0xb9,0x2e,0x2e,0x29,0x89,0x82,0xad,0xaa },
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// LOSTX
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new byte[] { 0x38,0xba,0x4b,0x5b,0x55,0xae,0xee,0xe0,0x67,0x48,0x08,0x0a,0x6a,0x3d,0x32,0x8d },
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// LOSTXTRAILER
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new byte[] { 0x34,0x7a,0xbb,0xcb,0x11,0x65,0xea,0x5c,0x27,0x0f,0xcf,0xc6,0x66,0x39,0x39,0xfd },
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// DRAMATICALMURDER
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new byte[] { 0x05,0x0d,0x0d,0x13,0xb5,0x3d,0x8d,0x2d,0x20,0xc7,0xc7,0xcf,0x1f,0xef,0xef,0x48 },
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// TOTONO
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new byte[] { 0x6e,0x60,0x90,0xac,0xb3,0xe3,0x83,0xd6,0xde,0x7a,0x7a,0x7f,0xef,0xbf,0xb2,0xd6 },
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// PHENOMENO
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new byte[] { 0x30,0x96,0xdb,0x2b,0x3d,0x81,0x02,0x74,0x47,0x2b,0xeb,0xee,0x6e,0x35,0x35,0x5d },
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// NEKODA
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new byte[] { 0xdc,0xdc,0xec,0xcd,0xdb,0xdc,0xdc,0xdc,0xdc,0xdc,0xdc,0xdc,0xdc,0xdc,0xdc,0xdc,0x1e,0x4e,0x66,0xb6 },
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};
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}
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}
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