mirror of
https://github.com/crskycode/GARbro.git
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implemented another version of NEKOPACK archives.
This commit is contained in:
morkt
parent
77af4a7f50
commit
c54f59a05a
@ -26,33 +26,39 @@
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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.Diagnostics;
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using System.IO;
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using System.Linq;
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using GameRes.Utility;
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namespace GameRes.Formats.Neko
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{
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public class NekoArchive : ArcFile
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internal interface INekoEncryption
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{
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public uint Key { get; private set; }
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void Decrypt (uint key, byte[] input, int offset, int length);
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}
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public NekoArchive (ArcView arc, ArchiveFormat impl, ICollection<Entry> dir, uint key)
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internal class NekoArchive : ArcFile
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{
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public readonly INekoEncryption Decoder;
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public NekoArchive (ArcView arc, ArchiveFormat impl, ICollection<Entry> dir, INekoEncryption decoder)
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: base (arc, impl, dir)
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{
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Key = key;
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Decoder = decoder;
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}
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}
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[Export(typeof(ArchiveFormat))]
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public class PakOpener : ArchiveFormat
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public class Pak1Opener : ArchiveFormat
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{
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public override string Tag { get { return "NEKO"; } }
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public override string Tag { get { return "NEKOPACK/1"; } }
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public override string Description { get { return "NekoPack resource archive"; } }
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public override uint Signature { get { return 0x4f4b454e; } } // "NEKO"
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public override bool IsHierarchic { get { return true; } }
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public override bool CanCreate { get { return false; } }
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public PakOpener ()
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public Pak1Opener ()
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{
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Extensions = new string[] { "dat" };
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}
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@ -61,10 +67,12 @@ namespace GameRes.Formats.Neko
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{
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if (!file.View.AsciiEqual (4, "PACK"))
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return null;
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int length = file.View.ReadInt32 (0x14);
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if (length <= 0 || length >= file.MaxOffset)
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return null;
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uint id = file.View.ReadUInt32 (8);
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int length;
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byte[] index = ReadBlock (file.View, id, 0x10, out length);
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int total = 0;
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var dec = new NekoEncryption32bit (id);
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byte[] index = ReadBlock (file.View, dec, 0x10, out length);
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long offset = 0x18 + length;
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var dir = new List<Entry>();
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int index_pos = 0;
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@ -74,8 +82,7 @@ namespace GameRes.Formats.Neko
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if (count <= 0 || count > remaining/8-1)
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return null;
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uint hash = LittleEndian.ToUInt32 (index, index_pos);
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total += count;
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dir.Capacity = total;
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dir.Capacity = dir.Count + count;
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index_pos += 8;
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for (int j = 0; j < count; ++j)
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{
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@ -97,16 +104,15 @@ namespace GameRes.Formats.Neko
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uint hash = LittleEndian.ToUInt32 (buffer, 0);
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if (0 != hash)
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{
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ulong key = KeyFromHash (hash);
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Decrypt (key, buffer, 8, 8);
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dec.Decrypt (hash, buffer, 8, 8);
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}
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uint signature = LittleEndian.ToUInt32 (buffer, 8);
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var res = FormatCatalog.Instance.LookupSignature (signature);
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var res = AutoEntry.DetectFileType (signature);
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string ext = "";
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if (res.Any())
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if (null != res)
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{
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ext = res.First().Extensions.First();
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entry.Type = res.First().Type;
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ext = res.Extensions.FirstOrDefault();
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entry.Type = res.Type;
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}
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else if (0x474e4d8a == signature)
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ext = "mng";
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@ -116,7 +122,7 @@ namespace GameRes.Formats.Neko
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entry.Name = i.ToString ("D4");
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++i;
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}
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return new NekoArchive (file, this, dir, id);
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return new NekoArchive (file, this, dir, dec);
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}
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public override Stream OpenEntry (ArcFile arc, Entry entry)
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@ -125,18 +131,10 @@ namespace GameRes.Formats.Neko
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if (null == pak)
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return arc.File.CreateStream (entry.Offset, entry.Size);
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int length;
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var data = ReadBlock (arc.File.View, pak.Key, entry.Offset, out length);
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var data = ReadBlock (arc.File.View, pak.Decoder, entry.Offset, out length);
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return new MemoryStream (data, 0, length, false);
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}
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static ulong KeyFromHash (uint hash)
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{
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uint v2 = hash ^ (hash + 1566083941u);
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uint v3 = v2 ^ (hash - 899497514u);
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ulong result = v3 ^ (v2 - 1894007588u);
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return result | (result ^ (v3 + 1812433253u)) << 32;
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}
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static uint HashFromString (uint seed, byte[] str, int offset, int length)
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{
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// 0x00000000, "NEKOPACK" -> 0xAC0BF0B1
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@ -190,31 +188,12 @@ namespace GameRes.Formats.Neko
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return v1 << v2 | v1 >> (32-v2);
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}
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static ulong Decrypt (ulong key, byte[] buf, int offset, int length)
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{
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unsafe
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{
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fixed (byte* data = buf)
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{
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ulong* first = (ulong*)(data + offset);
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ulong* last = first + length/8;
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while (first != last)
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{
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ulong v = *first ^ key;
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key = MMX.PAddW (key, v);
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*first++ = v;
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}
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return key;
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}
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}
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}
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static byte[] ReadBlock (ArcView.Frame view, uint id, long offset, out int length)
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static byte[] ReadBlock (ArcView.Frame view, INekoEncryption enc, long offset, out int length)
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{
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uint hash = view.ReadUInt32 (offset);
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length = view.ReadInt32 (offset+4);
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// parity check
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// if (CalcParity (id, (uint)length) != hash)
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// if (CalcParity (((NekoEncryption32bit)enc).Parity, (uint)length) != hash)
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// throw new InvalidFormatException();
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int aligned_size = (length+7) & ~7;
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@ -222,10 +201,351 @@ namespace GameRes.Formats.Neko
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length = view.Read (offset+8, buffer, 0, (uint)length);
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if (0 != hash)
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{
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ulong key = KeyFromHash (hash);
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Decrypt (key, buffer, 0, aligned_size);
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enc.Decrypt (hash, buffer, 0, aligned_size);
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}
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return buffer;
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}
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}
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internal class NekoEncryption32bit : INekoEncryption
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{
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public uint Parity { get; set; }
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public NekoEncryption32bit (uint parity)
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{
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Parity = parity;
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}
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public void Decrypt (uint hash, byte[] buf, int offset, int length)
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{
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if (offset < 0 || offset > buf.Length)
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throw new ArgumentException ("offset");
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int count = Math.Min (length, buf.Length-offset) / 8;
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if (0 == count)
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return;
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ulong key = KeyFromHash (hash);
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unsafe
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{
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fixed (byte* data = buf)
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{
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ulong* first = (ulong*)(data + offset);
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ulong* last = first + count;
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while (first != last)
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{
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ulong v = *first ^ key;
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key = MMX.PAddW (key, v);
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*first++ = v;
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}
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}
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}
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}
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public static ulong KeyFromHash (uint hash)
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{
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uint v2 = hash ^ (hash + 1566083941u);
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uint v3 = v2 ^ (hash - 899497514u);
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ulong result = v3 ^ (v2 - 1894007588u);
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return result | (result ^ (v3 + 1812433253u)) << 32;
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}
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}
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[Export(typeof(ArchiveFormat))]
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public class Pak2Opener : ArchiveFormat
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{
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public override string Tag { get { return "NEKOPACK/2"; } }
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public override string Description { get { return "NekoPack resource archive"; } }
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public override uint Signature { get { return 0x4F4B454E; } } // "NEKO"
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public override bool IsHierarchic { get { return true; } }
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public override bool CanCreate { get { return false; } }
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public Pak2Opener ()
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{
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Extensions = new string[] { "dat" };
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}
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public override ArcFile TryOpen (ArcView file)
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{
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if (!file.View.AsciiEqual (4, "PACK"))
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return null;
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uint init_key = file.View.ReadUInt32 (0xC);
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var xdec = new NekoXCode (init_key);
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uint key = file.View.ReadUInt32 (0x10);
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var buffer = file.View.ReadBytes (0x14, 8);
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xdec.Decrypt (key, buffer, 0, 8);
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uint index_size = LittleEndian.ToUInt32 (buffer, 0);
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if (index_size != LittleEndian.ToUInt32 (buffer, 4))
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return null;
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var index = new byte[(index_size + 7u) & ~7u];
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if (file.View.Read (0x1C, index, 0, index_size) < index_size)
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return null;
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xdec.Decrypt (key, index, 0, index.Length);
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var names_map = GetKnownNamesMap (init_key);
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int index_pos = 0;
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var dir = new List<Entry>();
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long current_offset = 0x1C + index.Length;
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while (index_pos < (int)index_size)
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{
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uint dir_hash = LittleEndian.ToUInt32 (index, index_pos);
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int count = LittleEndian.ToInt32 (index, index_pos+4);
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if (count != LittleEndian.ToInt32 (index, index_pos+8))
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break;
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index_pos += 12;
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string dir_name;
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if (!names_map.TryGetValue (dir_hash, out dir_name))
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dir_name = dir_hash.ToString ("X8");
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dir.Capacity = dir.Count + count;
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for (int i = 0; i < count; ++i)
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{
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uint name_hash = LittleEndian.ToUInt32 (index, index_pos);
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uint size = LittleEndian.ToUInt32 (index, index_pos+4);
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var entry = new Entry
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{
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Name = string.Format ("{0}/{1:X8}", dir_name, name_hash),
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Offset = current_offset,
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Size = size,
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};
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if (!entry.CheckPlacement (file.MaxOffset))
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return null;
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dir.Add (entry);
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index_pos += 8;
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current_offset += entry.Size;
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}
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}
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if (0 == dir.Count)
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return null;
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DetectTypes (file, dir, xdec);
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return new NekoArchive (file, this, dir, xdec);
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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 narc = arc as NekoArchive;
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if (null == narc || entry.Size <= 12)
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return base.OpenEntry (arc, entry);
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uint key = arc.File.View.ReadUInt32 (entry.Offset);
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var data = new byte[entry.Size];
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arc.File.View.Read (entry.Offset+4, data, 0, 8);
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narc.Decoder.Decrypt (key, data, 0, 8);
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int size = LittleEndian.ToInt32 (data, 0);
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if (size != LittleEndian.ToInt32 (data, 4))
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{
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Trace.WriteLine ("entry decryption failed", "[NEKOPACK]");
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return base.OpenEntry (arc, entry);
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}
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int aligned_size = (size + 7) & ~7;
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if (aligned_size > data.Length)
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data = new byte[aligned_size];
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arc.File.View.Read (entry.Offset+12, data, 0, (uint)size);
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narc.Decoder.Decrypt (key, data, 0, aligned_size);
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return new MemoryStream (data, 0, size);
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}
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void DetectTypes (ArcView file, List<Entry> dir, NekoXCode dec)
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{
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byte[] buffer = new byte[8];
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foreach (var entry in dir)
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{
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uint key = file.View.ReadUInt32 (entry.Offset);
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file.View.Read (entry.Offset+12, buffer, 0, 8);
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dec.Decrypt (key, buffer, 0, 8);
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uint signature = LittleEndian.ToUInt32 (buffer, 0);
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var res = AutoEntry.DetectFileType (signature);
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string ext = "";
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if (res != null)
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{
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ext = res.Extensions.FirstOrDefault();
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entry.Type = res.Type;
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}
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else if (0x474e4d8a == signature)
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ext = "mng";
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else if (entry.Name.StartsWith ("script/"))
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entry.Type = "script";
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if (!string.IsNullOrEmpty (ext))
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entry.Name = Path.ChangeExtension (entry.Name, ext);
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}
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}
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static uint ComputeHash (string name, uint hash)
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{
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foreach (var c in name)
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{
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hash = 0x100002A * (ShiftMap[c & 0xFF] ^ hash);
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}
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return hash;
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}
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static string[] KnownDirNames = {
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"image/actor", "image/back", "image/mask", "image/visual",
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"sound/bgm", "sound/env", "sound/se", "voice", "script", "system", "count",
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};
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Dictionary<uint, string> GetKnownNamesMap (uint key)
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{
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var map = new Dictionary<uint, string> (KnownDirNames.Length);
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foreach (var name in KnownDirNames)
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{
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map[ComputeHash (name, key)] = name;
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}
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return map;
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}
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static readonly byte[] ShiftMap = {
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0xc9, 0xca, 0x00, 0xcb, 0xcc, 0xcd, 0xce, 0xcf, 0xd0, 0xd1, 0x00, 0xd2, 0xd3, 0x27, 0x25, 0xc8,
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0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x00, 0xd4, 0x00, 0xd5, 0x00, 0x00,
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0xd6, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19,
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0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, 0x20, 0x21, 0x22, 0x23, 0x24, 0xd7, 0xc8, 0xd8, 0xd9, 0x26,
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0xda, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19,
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0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, 0x20, 0x21, 0x22, 0x23, 0x24, 0xdb, 0x00, 0xdc, 0xdd, 0x00,
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0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38,
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0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, 0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48,
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0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58,
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0x59, 0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f, 0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68,
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0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78,
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0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f, 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88,
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0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f, 0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98,
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0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f, 0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, 0xa8,
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};
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}
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internal class NekoXCode : INekoEncryption
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{
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uint[] m_random;
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SimdProgram m_program;
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public NekoXCode (uint init_key)
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{
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m_random = InitTable (init_key);
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m_program = new SimdProgram (init_key);
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}
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public void Decrypt (uint key, byte[] input, int offset, int length)
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{
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for (int i = 1; i < 7; ++i)
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{
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uint src = key % 0x28 * 2;
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m_program.mm[i] = m_random[src] | (ulong)m_random[src+1] << 32;
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key /= 0x28;
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}
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m_program.Execute (input, offset, length);
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}
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class SimdProgram
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{
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public ulong[] mm = new ulong[7];
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Action[] m_transform = new Action[4];
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Action[] m_shuffle = new Action[6];
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Action<int>[] TransformList;
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Action[] ShuffleList;
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public SimdProgram (uint key)
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{
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TransformList = new Action<int>[] {
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pxor, paddb, paddw, paddd, psubb, psubw, psubd,
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pxor, psubb, psubw, psubd, paddb, paddw, paddd,
|
||||
};
|
||||
ShuffleList = new Action[] {
|
||||
paddq_1_2, paddq_2_3, paddq_3_4, paddq_4_5, paddq_5_6, paddq_6_1,
|
||||
};
|
||||
|
||||
GenerateProgram (key);
|
||||
}
|
||||
|
||||
void pxor (int i) { mm[0] ^= mm[i]; }
|
||||
void paddb (int i) { mm[0] = MMX.PAddB (mm[0], mm[i]); }
|
||||
void paddw (int i) { mm[0] = MMX.PAddW (mm[0], mm[i]); }
|
||||
void paddd (int i) { mm[0] = MMX.PAddD (mm[0], mm[i]); }
|
||||
void psubb (int i) { mm[0] = MMX.PSubB (mm[0], mm[i]); }
|
||||
void psubw (int i) { mm[0] = MMX.PSubW (mm[0], mm[i]); }
|
||||
void psubd (int i) { mm[0] = MMX.PSubD (mm[0], mm[i]); }
|
||||
|
||||
void paddq_1_2 () { mm[1] += mm[2]; }
|
||||
void paddq_2_3 () { mm[2] += mm[3]; }
|
||||
void paddq_3_4 () { mm[3] += mm[4]; }
|
||||
void paddq_4_5 () { mm[4] += mm[5]; }
|
||||
void paddq_5_6 () { mm[5] += mm[6]; }
|
||||
void paddq_6_1 () { mm[6] += mm[1]; }
|
||||
|
||||
void GenerateProgram (uint key)
|
||||
{
|
||||
int t1 = 7 + (int)(key >> 28);
|
||||
int cmd_base = (int)key & 0xffff;
|
||||
int arg_base = (int)(key >> 16) & 0xfff;
|
||||
for (int i = 3; i >= 0; --i)
|
||||
{
|
||||
int cmd = ((cmd_base >> (4 * i)) + t1) % TransformList.Length;
|
||||
int arg = (arg_base >> (3 * i)) % 6 + 1;
|
||||
m_transform[3-i] = () => TransformList[cmd] (arg);
|
||||
}
|
||||
for (uint i = 0; i < 6; ++i)
|
||||
{
|
||||
m_shuffle[i] = ShuffleList[(i + key) % (uint)ShuffleList.Length];
|
||||
}
|
||||
}
|
||||
|
||||
public unsafe void Execute (byte[] input, int offset, int length)
|
||||
{
|
||||
if (offset < 0 || offset > input.Length)
|
||||
throw new ArgumentException ("offset");
|
||||
int count = Math.Min (length, input.Length-offset) / 8;
|
||||
if (0 == count)
|
||||
return;
|
||||
fixed (byte* data = &input[offset])
|
||||
{
|
||||
ulong* data64 = (ulong*)data;
|
||||
for (;;)
|
||||
{
|
||||
mm[0] = *data64;
|
||||
foreach (var cmd in m_transform)
|
||||
cmd();
|
||||
*data64++ = mm[0];
|
||||
if (1 == count--)
|
||||
break;
|
||||
foreach (var cmd in m_shuffle)
|
||||
cmd();
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
static uint[] InitTable (uint key)
|
||||
{
|
||||
uint a = 0;
|
||||
uint b = 0;
|
||||
do
|
||||
{
|
||||
a <<= 1;
|
||||
b ^= 1;
|
||||
a = ((a | b) << (int)(key & 1)) | b;
|
||||
key >>= 1;
|
||||
}
|
||||
while (0 == (a & 0x80000000));
|
||||
key = a << 1;
|
||||
a = key + Binary.BigEndian (key);
|
||||
byte count = (byte)key;
|
||||
do
|
||||
{
|
||||
b = key ^ a;
|
||||
a = (b << 4) ^ (b >> 4) ^ (b << 3) ^ (b >> 3) ^ b;
|
||||
}
|
||||
while (--count != 0);
|
||||
|
||||
var table = new uint[154];
|
||||
for (int i = 0; i < table.Length; ++i)
|
||||
{
|
||||
b = key ^ a;
|
||||
a = (b << 4) ^ (b >> 4) ^ (b << 3) ^ (b >> 3) ^ b;
|
||||
table[i] = a;
|
||||
}
|
||||
return table;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
@ -97,7 +97,10 @@ White ~blanche comme la lune~<br/>
|
||||
</td></tr>
|
||||
<tr class="odd"><td>*.rct</td><td><tt>\x98\x5A\x92\x9AT</tt></td><td>Yes</td></tr>
|
||||
<tr class="odd"><td>*.rc8</td><td><tt>\x98\x5A\x92\x9A8_00</tt></td><td>No</td></tr>
|
||||
<tr><td>*.dat</td><td><tt>NEKOPACK</tt></td><td>No</td><td>Rosebleu</td><td>Inpyuri -Hito to Anata to Ayakashi to-</td></tr>
|
||||
<tr><td>*.dat</td><td><tt>NEKOPACK</tt></td><td>No</td><td>Rosebleu<br/>Lime</td><td>
|
||||
Inpyuri -Hito to Anata to Ayakashi to-<br/>
|
||||
Nostradamus ni Kiitemiro♪<br/>
|
||||
</td></tr>
|
||||
<tr class="odd"><td>*.dat</td><td>-</td><td>No</td><td>Meteor<br/>Silver Bullet</td><td>
|
||||
Chokotto☆Vampire!<br/>
|
||||
Clover Point<br/>
|
||||
@ -357,6 +360,7 @@ Konneko<br/>
|
||||
Natsu no Ame<br/>
|
||||
Sakura Musubi<br/>
|
||||
Santaful☆Summer<br/>
|
||||
Space☆Trouble<br/>
|
||||
Tonarizuma<br/>
|
||||
Yatohime Zankikou<br/>
|
||||
</td></tr>
|
||||
|
||||
Loading…
Reference in New Issue
Block a user