mirror of
https://github.com/crskycode/GARbro.git
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627 lines
23 KiB
C#
627 lines
23 KiB
C#
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//! \file ArcXP3.cs
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//! \date Wed Jul 16 13:58:17 2014
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//! \brief KiriKiri engine archive implementation.
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//
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using System;
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using System.IO;
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using System.IO.MemoryMappedFiles;
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using System.Text;
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using System.Linq;
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using System.Collections.Generic;
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using System.ComponentModel.Composition;
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using System.Windows.Media;
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using System.Windows.Media.Imaging;
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using System.Diagnostics;
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using GameRes.Utility;
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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.KiriKiri
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{
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public struct Xp3Segment
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{
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public bool IsCompressed;
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public long Offset;
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public uint Size;
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public uint PackedSize;
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}
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public class Xp3Entry : PackedEntry
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{
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List<Xp3Segment> m_segments = new List<Xp3Segment>();
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public bool IsEncrypted { get; set; }
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public ICrypt Cipher { get; set; }
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public ICollection<Xp3Segment> Segments { get { return m_segments; } }
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public uint Hash { get; set; }
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}
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// Archive version 1: encrypt file first, then calculate checksum
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// version 2: calculate checksum, then encrypt
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[Export(typeof(ArchiveFormat))]
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public class Xp3Opener : ArchiveFormat
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{
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public override string Tag { get { return "XP3"; } }
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public override string Description { get { return "KiriKiri game engine resource archive"; } }
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public override uint Signature { get { return 0x0d335058; } }
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private static readonly ICrypt NoCryptAlgorithm = new NoCrypt();
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public static readonly Dictionary<string, ICrypt> KnownSchemes = new Dictionary<string, ICrypt> {
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{ arcStrings.ArcNoEncryption, NoCryptAlgorithm },
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{ "Fate/Stay Night", new FateCrypt() },
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{ "Swan Song", new SwanSongCrypt() },
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{ "Cafe Sourire", new XorCrypt (0xcd) },
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{ "Seirei Tenshou", new SeitenCrypt() },
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{ "Okiba ga Nai!", new OkibaCrypt() },
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};
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public override ArcFile TryOpen (ArcView file)
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{
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if (!file.View.AsciiEqual (0, "XP3\x0d\x0a\x20\x0a\x1a\x8b\x67\x01"))
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return null;
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long dir_offset = file.View.ReadInt64 (0x0b);
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if (0x17 == dir_offset)
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{
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if (1 != file.View.ReadUInt32 (0x13))
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return null;
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if (0x80 != file.View.ReadUInt32 (0x17))
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return null;
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dir_offset = file.View.ReadInt64 (0x20);
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}
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int header_type = file.View.ReadByte (dir_offset);
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if (0 != header_type && 1 != header_type)
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return null;
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Stream header_stream;
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if (0 == header_type) // read unpacked header
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{
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long header_size = file.View.ReadInt64 (dir_offset+1);
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if (header_size > uint.MaxValue)
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return null;
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header_stream = file.CreateStream (dir_offset+9, (uint)header_size);
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}
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else // read packed header
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{
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long packed_size = file.View.ReadInt64 (dir_offset+1);
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if (packed_size > uint.MaxValue)
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return null;
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long header_size = file.View.ReadInt64 (dir_offset+9);
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using (var input = file.CreateStream (dir_offset+17, (uint)packed_size))
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header_stream = ZLibCompressor.DeCompress (input);
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}
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var crypt_algorithm = new Lazy<ICrypt> (QueryCryptAlgorithm);
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var dir = new List<Entry>();
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dir_offset = 0;
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using (var header = new BinaryReader (header_stream, Encoding.Unicode))
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{
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while (-1 != header.PeekChar())
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{
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uint entry_signature = header.ReadUInt32();
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if (0x656c6946 != entry_signature) // "File"
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{
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break;
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}
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long entry_size = header.ReadInt64();
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dir_offset += 12 + entry_size;
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var entry = new Xp3Entry();
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while (entry_size > 0)
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{
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uint section = header.ReadUInt32();
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long section_size = header.ReadInt64();
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entry_size -= 12;
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if (section_size > entry_size)
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break;
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entry_size -= section_size;
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long next_section_pos = header.BaseStream.Position + section_size;
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switch (section)
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{
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case 0x6f666e69: // "info"
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{
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if (entry.Size != 0 || !string.IsNullOrEmpty (entry.Name))
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{
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goto NextEntry; // ambiguous entry, ignore
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}
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entry.IsEncrypted = 0 != header.ReadUInt32();
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long file_size = header.ReadInt64();
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long packed_size = header.ReadInt64();
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if (file_size > uint.MaxValue || packed_size > uint.MaxValue)
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{
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goto NextEntry;
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}
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entry.IsPacked = file_size != packed_size;
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entry.Size = (uint)packed_size;
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entry.UnpackedSize = (uint)file_size;
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int name_size = header.ReadInt16();
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if (name_size > 0x100 || name_size <= 0)
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{
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goto NextEntry;
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}
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if (entry.IsEncrypted)
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entry.Cipher = crypt_algorithm.Value;
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else
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entry.Cipher = NoCryptAlgorithm;
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char[] name = header.ReadChars (name_size);
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entry.Name = new string (name);
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entry.Type = FormatCatalog.Instance.GetTypeFromName (entry.Name);
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break;
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}
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case 0x6d676573: // "segm"
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{
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int segment_count = (int)(section_size / 0x1c);
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if (segment_count > 0)
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{
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for (int i = 0; i < segment_count; ++i)
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{
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bool compressed = 0 != header.ReadInt32();
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long segment_offset = header.ReadInt64();
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long segment_size = header.ReadInt64();
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long segment_packed_size = header.ReadInt64();
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if (segment_offset > file.MaxOffset || segment_size > file.MaxOffset
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|| segment_packed_size > file.MaxOffset)
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{
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goto NextEntry;
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}
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var segment = new Xp3Segment {
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IsCompressed = compressed,
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Offset = segment_offset,
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Size = (uint)segment_size,
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PackedSize = (uint)segment_packed_size
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};
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entry.Segments.Add (segment);
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}
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entry.Offset = entry.Segments.First().Offset;
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}
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break;
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}
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case 0x726c6461: // "adlr"
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if (4 == section_size)
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entry.Hash = header.ReadUInt32();
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break;
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default: // unknown section
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break;
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}
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header.BaseStream.Position = next_section_pos;
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}
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if (!string.IsNullOrEmpty (entry.Name) && entry.Segments.Any())
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dir.Add (entry);
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NextEntry:
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header.BaseStream.Position = dir_offset;
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}
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}
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return new ArcFile (file, this, dir);
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}
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public override Stream OpenEntry (ArcFile arc, Entry entry)
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{
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var xp3_entry = entry as Xp3Entry;
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if (null == xp3_entry || !xp3_entry.Segments.Any())
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return arc.File.CreateStream (entry.Offset, entry.Size);
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if (1 == xp3_entry.Segments.Count && !xp3_entry.IsEncrypted)
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{
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var segment = xp3_entry.Segments.First();
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if (segment.IsCompressed)
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return new ZLibStream (arc.File.CreateStream (segment.Offset, segment.PackedSize),
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CompressionMode.Decompress);
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else
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return arc.File.CreateStream (segment.Offset, segment.Size);
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}
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return new Xp3Stream (arc.File, xp3_entry);
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}
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string m_scheme = GetDefaultScheme();
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ICrypt QueryCryptAlgorithm ()
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{
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var widget = new GUI.WidgetXP3 (m_scheme);
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var args = new ParametersRequestEventArgs
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{
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Notice = arcStrings.ArcEncryptedNotice,
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InputWidget = widget,
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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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m_scheme = widget.GetScheme();
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if (null != m_scheme)
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{
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ICrypt algorithm;
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if (KnownSchemes.TryGetValue (m_scheme, out algorithm))
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{
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Settings.Default.XP3Scheme = m_scheme;
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return algorithm;
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}
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}
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return NoCryptAlgorithm;
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}
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public static string GetDefaultScheme ()
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{
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string scheme = Settings.Default.XP3Scheme;
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if (!string.IsNullOrEmpty (scheme) && KnownSchemes.ContainsKey (scheme))
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return scheme;
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else
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return arcStrings.ArcNoEncryption;
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}
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static uint GetFileCheckSum (Stream src)
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{
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// compute file checksum via adler32.
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// src's file pointer should be reset to zero.
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var sum = new Adler32();
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byte[] buf = new byte[64*1024];
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for (;;)
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{
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int read = src.Read (buf, 0, buf.Length);
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if (0 == read) break;
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sum.Update (buf, 0, read);
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}
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return sum.Value;
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}
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}
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public class Xp3Stream : Stream
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{
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ArcView m_file;
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Xp3Entry m_entry;
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IEnumerator<Xp3Segment> m_segment;
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Stream m_stream;
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long m_offset = 0;
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bool m_eof = false;
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public override bool CanRead { get { return true; } }
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public override bool CanSeek { get { return false; } }
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public override bool CanWrite { get { return false; } }
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public override long Length { get { return m_entry.UnpackedSize; } }
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public override long Position
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{
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get { return m_offset; }
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set { throw new NotSupportedException ("Xp3Stream.Position not supported."); }
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}
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public Xp3Stream (ArcView file, Xp3Entry entry)
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{
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m_file = file;
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m_entry = entry;
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m_segment = entry.Segments.GetEnumerator();
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NextSegment();
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}
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private void NextSegment ()
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{
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if (!m_segment.MoveNext())
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{
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m_eof = true;
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return;
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}
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if (null != m_stream)
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m_stream.Dispose();
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var segment = m_segment.Current;
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if (segment.IsCompressed)
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m_stream = new ZLibStream (m_file.CreateStream (segment.Offset, segment.PackedSize),
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CompressionMode.Decompress);
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else
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m_stream = m_file.CreateStream (segment.Offset, segment.Size);
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}
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public override int Read (byte[] buffer, int offset, int count)
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{
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int total = 0;
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while (!m_eof && count > 0)
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{
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int read = m_stream.Read (buffer, offset, count);
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m_entry.Cipher.Decrypt (m_entry, m_offset, buffer, offset, read);
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m_offset += read;
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total += read;
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offset += read;
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count -= read;
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if (0 != count)
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NextSegment();
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}
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return total;
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}
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public override int ReadByte ()
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{
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int b = -1;
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while (!m_eof)
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{
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b = m_stream.ReadByte();
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if (-1 != b)
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{
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b = m_entry.Cipher.Decrypt (m_entry, m_offset++, (byte)b);
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break;
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}
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NextSegment();
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}
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return b;
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}
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public override void Flush ()
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{
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}
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public override long Seek (long offset, SeekOrigin origin)
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{
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throw new NotSupportedException ("Xp3Stream.Seek method is not supported");
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}
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public override void SetLength (long length)
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{
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throw new NotSupportedException ("Xp3Stream.SetLength method is not supported");
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}
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public override void Write (byte[] buffer, int offset, int count)
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{
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throw new NotSupportedException ("Xp3Stream.Write method is not supported");
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}
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public override void WriteByte (byte value)
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{
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throw new NotSupportedException("Xp3Stream.WriteByte method is not supported");
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}
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#region IDisposable Members
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bool disposed = false;
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protected override void Dispose (bool disposing)
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{
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if (!disposed)
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{
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m_file = null;
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if (null != m_stream)
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{
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m_stream.Dispose();
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m_stream = null;
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}
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disposed = true;
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base.Dispose (disposing);
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}
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}
|
||
|
|
#endregion
|
||
|
|
}
|
||
|
|
|
||
|
|
public abstract class ICrypt
|
||
|
|
{
|
||
|
|
public abstract byte Decrypt (Xp3Entry entry, long offset, byte value);
|
||
|
|
|
||
|
|
public virtual void Decrypt (Xp3Entry entry, long offset, byte[] values, int pos, int count)
|
||
|
|
{
|
||
|
|
for (int i = 0; i < count; ++i)
|
||
|
|
values[pos+i] = this.Decrypt (entry, offset+i, values[pos+i]);
|
||
|
|
}
|
||
|
|
|
||
|
|
public virtual void Encrypt (Xp3Entry entry, long offset, byte[] values, int pos, int count)
|
||
|
|
{
|
||
|
|
throw new NotImplementedException ("Encryption method not implemented");
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
public class NoCrypt : ICrypt
|
||
|
|
{
|
||
|
|
public override byte Decrypt (Xp3Entry entry, long offset, byte value)
|
||
|
|
{
|
||
|
|
return value;
|
||
|
|
}
|
||
|
|
public override void Decrypt (Xp3Entry entry, long offset, byte[] values, int pos, int count)
|
||
|
|
{
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
public override void Encrypt (Xp3Entry entry, long offset, byte[] values, int pos, int count)
|
||
|
|
{
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
internal class FateCrypt : ICrypt
|
||
|
|
{
|
||
|
|
public override byte Decrypt (Xp3Entry entry, long offset, byte value)
|
||
|
|
{
|
||
|
|
byte result = (byte)(value ^ 0x36);
|
||
|
|
if (0x13 == offset)
|
||
|
|
result ^= 1;
|
||
|
|
else if (0x2ea29 == offset)
|
||
|
|
result ^= 3;
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
public override void Decrypt (Xp3Entry entry, long offset, byte[] values, int pos, int count)
|
||
|
|
{
|
||
|
|
for (int i = 0; i < count; ++i)
|
||
|
|
{
|
||
|
|
values[pos+i] ^= 0x36;
|
||
|
|
}
|
||
|
|
if (offset > 0x2ea29)
|
||
|
|
return;
|
||
|
|
if (offset + count > 0x2ea29)
|
||
|
|
values[pos+0x2ea29-offset] ^= 3;
|
||
|
|
if (offset > 0x13)
|
||
|
|
return;
|
||
|
|
if (offset + count > 0x13)
|
||
|
|
values[pos+0x13-offset] ^= 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
public override void Encrypt (Xp3Entry entry, long offset, byte[] values, int pos, int count)
|
||
|
|
{
|
||
|
|
Decrypt (entry, offset, values, pos, count);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
internal class XorCrypt : ICrypt
|
||
|
|
{
|
||
|
|
private byte m_key;
|
||
|
|
|
||
|
|
public byte Key
|
||
|
|
{
|
||
|
|
get { return m_key; }
|
||
|
|
set { m_key = value; }
|
||
|
|
}
|
||
|
|
|
||
|
|
public XorCrypt (uint key)
|
||
|
|
{
|
||
|
|
m_key = (byte)key;
|
||
|
|
}
|
||
|
|
|
||
|
|
public override byte Decrypt (Xp3Entry entry, long offset, byte value)
|
||
|
|
{
|
||
|
|
return (byte)(value ^ m_key);
|
||
|
|
}
|
||
|
|
|
||
|
|
public override void Decrypt (Xp3Entry entry, long offset, byte[] values, int pos, int count)
|
||
|
|
{
|
||
|
|
for (int i = 0; i < count; ++i)
|
||
|
|
{
|
||
|
|
values[pos+i] ^= m_key;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
public override void Encrypt (Xp3Entry entry, long offset, byte[] values, int pos, int count)
|
||
|
|
{
|
||
|
|
Decrypt (entry, offset, values, pos, count);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
internal class SwanSongCrypt : ICrypt
|
||
|
|
{
|
||
|
|
static private byte Adjust (uint hash, out int shift)
|
||
|
|
{
|
||
|
|
int cl = (int)(hash & 0xff);
|
||
|
|
if (0 == cl) cl = 0x0f;
|
||
|
|
shift = cl & 7;
|
||
|
|
int ch = (int)((hash >> 8) & 0xff);
|
||
|
|
if (0 == ch) ch = 0xf0;
|
||
|
|
return (byte)ch;
|
||
|
|
}
|
||
|
|
|
||
|
|
public override byte Decrypt (Xp3Entry entry, long offset, byte value)
|
||
|
|
{
|
||
|
|
int shift;
|
||
|
|
byte xor = Adjust (entry.Hash, out shift);
|
||
|
|
uint data = (uint)(value ^ xor);
|
||
|
|
return (byte)((data >> shift) | (data << (8 - shift)));
|
||
|
|
}
|
||
|
|
|
||
|
|
public override void Decrypt (Xp3Entry entry, long offset, byte[] values, int pos, int count)
|
||
|
|
{
|
||
|
|
int shift;
|
||
|
|
byte xor = Adjust (entry.Hash, out shift);
|
||
|
|
for (int i = 0; i < count; ++i)
|
||
|
|
{
|
||
|
|
uint data = (uint)(values[pos+i] ^ xor);
|
||
|
|
values[pos+i] = (byte)((data >> shift) | (data << (8 - shift)));
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
public override void Encrypt (Xp3Entry entry, long offset, byte[] values, int pos, int count)
|
||
|
|
{
|
||
|
|
int shift;
|
||
|
|
byte xor = Adjust (entry.Hash, out shift);
|
||
|
|
for (int i = 0; i < count; ++i)
|
||
|
|
{
|
||
|
|
uint data = values[pos+i];
|
||
|
|
data = (byte)((data << shift) | (data >> (8 - shift)));
|
||
|
|
values[pos+i] = (byte)(data ^ xor);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
internal class SeitenCrypt : ICrypt
|
||
|
|
{
|
||
|
|
public override byte Decrypt (Xp3Entry entry, long offset, byte value)
|
||
|
|
{
|
||
|
|
uint key = entry.Hash ^ (uint)offset;
|
||
|
|
if (0 != (key & 2))
|
||
|
|
{
|
||
|
|
int ecx = (int)key & 0x18;
|
||
|
|
value ^= (byte)((key >> ecx) | (key >> (ecx & 8)));
|
||
|
|
}
|
||
|
|
if (0 != (key & 4))
|
||
|
|
{
|
||
|
|
value += (byte)key;
|
||
|
|
}
|
||
|
|
if (0 != (key & 8))
|
||
|
|
{
|
||
|
|
value -= (byte)(key >> (int)(key & 0x10));
|
||
|
|
}
|
||
|
|
return value;
|
||
|
|
}
|
||
|
|
|
||
|
|
public override void Encrypt (Xp3Entry entry, long offset, byte[] values, int pos, int count)
|
||
|
|
{
|
||
|
|
for (int i = 0; i < count; ++i)
|
||
|
|
{
|
||
|
|
uint key = entry.Hash ^ (uint)offset;
|
||
|
|
if (0 != (key & 8))
|
||
|
|
{
|
||
|
|
values[pos+i] += (byte)(key >> (int)(key & 0x10));
|
||
|
|
}
|
||
|
|
if (0 != (key & 4))
|
||
|
|
{
|
||
|
|
values[pos+i] -= (byte)key;
|
||
|
|
}
|
||
|
|
if (0 != (key & 2))
|
||
|
|
{
|
||
|
|
int ecx = (int)key & 0x18;
|
||
|
|
values[pos+i] ^= (byte)((key >> ecx) | (key >> (ecx & 8)));
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
internal class OkibaCrypt : ICrypt
|
||
|
|
{
|
||
|
|
public override byte Decrypt (Xp3Entry entry, long offset, byte value)
|
||
|
|
{
|
||
|
|
if (offset < 0x65)
|
||
|
|
return (byte)(value ^ (byte)(entry.Hash >> 4));
|
||
|
|
uint key = entry.Hash;
|
||
|
|
// 0,1,2,3 -> 1,0,3,2
|
||
|
|
key = ((key & 0xff0000) << 8) | ((key & 0xff000000) >> 8)
|
||
|
|
| ((key & 0xff00) >> 8) | ((key & 0xff) << 8);
|
||
|
|
key >>= 8 * ((int)(offset - 0x65) & 3);
|
||
|
|
return (byte)(value ^ (byte)key);
|
||
|
|
}
|
||
|
|
|
||
|
|
public override void Decrypt (Xp3Entry entry, long offset, byte[] values, int pos, int count)
|
||
|
|
{
|
||
|
|
int i = 0;
|
||
|
|
if (offset < 0x65)
|
||
|
|
{
|
||
|
|
uint key = entry.Hash >> 4;
|
||
|
|
int limit = Math.Min (count, (int)(0x65 - offset));
|
||
|
|
for (; i < limit; ++i)
|
||
|
|
{
|
||
|
|
values[pos+i] ^= (byte)key;
|
||
|
|
++offset;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (i < count)
|
||
|
|
{
|
||
|
|
offset -= 0x65;
|
||
|
|
uint key = entry.Hash;
|
||
|
|
key = ((key & 0xff0000) << 8) | ((key & 0xff000000) >> 8)
|
||
|
|
| ((key & 0xff00) >> 8) | ((key & 0xff) << 8);
|
||
|
|
do
|
||
|
|
{
|
||
|
|
values[pos+i] ^= (byte)(key >> (8 * ((int)offset & 3)));
|
||
|
|
++offset;
|
||
|
|
}
|
||
|
|
while (++i < count);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
public override void Encrypt (Xp3Entry entry, long offset, byte[] values, int pos, int count)
|
||
|
|
{
|
||
|
|
Decrypt (entry, offset, values, pos, count);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|