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refactored DX archives.
This commit is contained in:
morkt
parent
51b0675cd0
commit
9084a4857f
@ -1,8 +1,8 @@
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//! \file ArcDX.cs
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//! \date Thu Oct 08 00:18:56 2015
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//! \brief Encrypted Flatz archives with 'DX' signature.
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//! \brief DxLib engine archives with 'DX' signature.
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//
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// Copyright (C) 2015 by morkt
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// Copyright (C) 2015-2016 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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@ -27,9 +27,10 @@ using System;
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using System.Collections.Generic;
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using System.ComponentModel.Composition;
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using System.IO;
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using System.Linq;
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using GameRes.Utility;
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namespace GameRes.Formats.Flat
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namespace GameRes.Formats.DxLib
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{
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internal class DxArchive : ArcFile
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{
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@ -42,44 +43,49 @@ namespace GameRes.Formats.Flat
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}
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}
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[Export(typeof(ArchiveFormat))]
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public class DatOpener : ArchiveFormat
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[Serializable]
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public class DxScheme : ResourceScheme
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{
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public override string Tag { get { return "DAT/FLAT"; } }
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public override string Description { get { return "Flat DX resource archive"; } }
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public IList<byte[]> KnownKeys;
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}
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[Export(typeof(ArchiveFormat))]
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public class DxOpener : ArchiveFormat
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{
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public override string Tag { get { return "DXA"; } }
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public override string Description { get { return "DxLib engine resource archive"; } }
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public override uint Signature { get { return 0; } }
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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 DatOpener ()
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public DxOpener ()
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{
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Signatures = new uint[] { 0x19EF8ED4 }; // the only recognized encryption scheme
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Extensions = new string[] { "dxa", "hud", "usi", "med", "dat" };
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Signatures = new uint[] { 0x19EF8ED4, 0xA9FCCEDD, 0x0AEE0FD3, 0 };
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}
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static readonly string[] KnownKeys = new string[]
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{
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"omanco", // Cross Quartz
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};
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public static IList<byte[]> KnownKeys = new List<byte[]>();
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public override ArcFile TryOpen (ArcView file)
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{
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int signature = file.View.ReadUInt16 (0);
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int version = file.View.ReadUInt16 (2);
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var key = new byte[12];
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foreach (var key_str in KnownKeys)
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uint signature = file.View.ReadUInt32 (0);
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foreach (var key in KnownKeys)
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{
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GetKeyBytes (key_str, key);
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int xor_id = key[0] | (key[1] << 8);
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int xor_ver = key[2] | (key[3] << 8);
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if ((signature ^ xor_id) != 0x5844) // 'DX'
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continue;
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xor_ver ^= version;
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if (xor_ver < 1 || xor_ver > 4)
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continue;
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var dir = ReadIndex (file, xor_ver, key);
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if (null != dir)
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return new DxArchive (file, this, dir, key);
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break;
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uint sig_key = LittleEndian.ToUInt32 (key, 0);
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uint sig_test = signature ^ sig_key;
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int version = (int)(sig_test >> 16);
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if (0x5844 == (sig_test & 0xFFFF) && version <= 4) // 'DX'
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{
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var dir = ReadIndex (file, version, key);
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if (null != dir)
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{
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// move last used key to the top of the known keys list
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KnownKeys.Remove (key);
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KnownKeys.Insert (0, key);
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return new DxArchive (file, this, dir, key);
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}
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break;
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}
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}
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return null;
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}
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@ -167,8 +173,8 @@ namespace GameRes.Formats.Flat
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List<Entry> ReadIndex (ArcView file, int version, byte[] key)
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{
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var header = new byte[0x18];
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if (0x18 != file.View.Read (4, header, 0, 0x18))
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var header = file.View.ReadBytes (4, 0x18);
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if (0x18 != header.Length)
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return null;
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Decrypt (header, 0, header.Length, 4, key);
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var dx = new DxHeader {
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@ -197,27 +203,40 @@ namespace GameRes.Formats.Flat
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}
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}
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private static void GetKeyBytes (string key, byte[] dst)
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public static byte[] CreateKey (string keyword)
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{
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int key_length = Math.Min (dst.Length, key.Length);
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key_length = Encodings.cp932.GetBytes (key, 0, key_length, dst, 0);
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int j = 0;
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for (int i = key_length; i < dst.Length; ++i)
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byte[] key;
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if (string.IsNullOrEmpty (keyword))
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{
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dst[i] = dst[j++];
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key = Enumerable.Repeat<byte> (0xAA, 12).ToArray();
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}
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dst[0] = (byte)~dst[0];
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dst[1] = (byte)((dst[1] >> 4) | (dst[1] << 4));
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dst[2] = (byte)(dst[2] ^ 0x8A);
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dst[3] = (byte)(~((dst[3] >> 4) | (dst[3] << 4)));
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dst[4] = (byte)~dst[4];
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dst[5] = (byte)(dst[5] ^ 0xAC);
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dst[6] = (byte)~dst[6];
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dst[7] = (byte)(~((dst[7] >> 3) | (dst[7] << 5)));
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dst[8] = (byte)((dst[8] >> 5) | (dst[8] << 3));
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dst[9] = (byte)(dst[9] ^ 0x7F);
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dst[10] = (byte)(((dst[10] >> 4) | (dst[10] << 4)) ^ 0xD6);
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dst[11] = (byte)(dst[11] ^ 0xCC);
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else
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{
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key = new byte[12];
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int char_count = Math.Min (keyword.Length, 12);
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int length = Encodings.cp932.GetBytes (keyword, 0, char_count, key, 0);
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if (length < 12)
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Binary.CopyOverlapped (key, 0, length, 12-length);
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}
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key[0] ^= 0xFF;
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key[1] = Binary.RotByteR (key[1], 4);
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key[2] ^= 0x8A;
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key[3] = (byte)~Binary.RotByteR (key[3], 4);
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key[4] ^= 0xFF;
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key[5] ^= 0xAC;
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key[6] ^= 0xFF;
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key[7] = (byte)~Binary.RotByteR (key[7], 3);
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key[8] = Binary.RotByteL (key[8], 3);
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key[9] ^= 0x7F;
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key[10] = (byte)(Binary.RotByteR (key[10], 4) ^ 0xD6);
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key[11] ^= 0xCC;
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return key;
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}
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public override ResourceScheme Scheme
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{
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get { return new DxScheme { KnownKeys = KnownKeys }; }
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set { KnownKeys = ((DxScheme)value).KnownKeys; }
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}
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}
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@ -334,62 +353,31 @@ namespace GameRes.Formats.Flat
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#endregion
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}
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internal class EncryptedStream : Stream
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internal class EncryptedStream : ProxyStream
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{
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private Stream m_stream;
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private int m_base_pos;
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private byte[] m_key;
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private bool m_should_dispose;
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public Stream BaseStream { get { return m_stream; } }
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public override bool CanRead { get { return m_stream.CanRead; } }
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public override bool CanSeek { get { return m_stream.CanSeek; } }
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public override bool CanWrite { get { return m_stream.CanWrite; } }
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public override long Length { get { return m_stream.Length; } }
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public override long Position
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public EncryptedStream (Stream stream, long base_position, byte[] key, bool leave_open = false)
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: base (stream, leave_open)
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{
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get { return m_stream.Position; }
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set { m_stream.Position = value; }
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}
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public EncryptedStream (Stream input, long base_position, byte[] key)
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{
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m_stream = input;
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m_key = key;
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m_base_pos = (int)(base_position % m_key.Length);
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m_should_dispose = true;
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}
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#region System.IO.Stream methods
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public override void Flush()
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{
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m_stream.Flush();
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}
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public override long Seek (long offset, SeekOrigin origin)
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{
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return m_stream.Seek (offset, origin);
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}
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public override void SetLength (long length)
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{
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m_stream.SetLength (length);
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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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var key_pos = m_base_pos + Position;
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int read = m_stream.Read (buffer, offset, count);
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int read = BaseStream.Read (buffer, offset, count);
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if (read > 0)
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DatOpener.Decrypt (buffer, offset, count, key_pos, m_key);
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DxOpener.Decrypt (buffer, offset, count, key_pos, m_key);
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return read;
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}
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public override int ReadByte ()
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{
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int key_pos = (int)((m_base_pos + Position) % m_key.Length);
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int b = m_stream.ReadByte();
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int b = BaseStream.ReadByte();
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if (-1 != b)
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{
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b ^= m_key[key_pos];
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@ -407,30 +395,13 @@ namespace GameRes.Formats.Flat
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if (m_key.Length == key_pos)
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key_pos = 0;
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}
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m_stream.Write (write_buf, 0, count);
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BaseStream.Write (write_buf, 0, count);
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}
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public override void WriteByte (byte value)
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{
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int key_pos = (int)((m_base_pos + Position) % m_key.Length);
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m_stream.WriteByte ((byte)(value ^ m_key[key_pos]));
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BaseStream.WriteByte ((byte)(value ^ m_key[key_pos]));
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}
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#endregion
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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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if (disposing && m_should_dispose)
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{
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m_stream.Dispose();
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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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}
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#endregion
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}
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}
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@ -101,6 +101,7 @@ Yakuchu!<br/>
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</td></tr>
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<tr><td>*.tgf</td><td>-</td><td>No</td></tr>
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<tr class="odd"><td>*.arc</td><td><tt>MajiroArcV1.000</tt><br/><tt>MajiroArcV2.000</tt><br/><tt>MajiroArcV3.000</tt></td><td>Yes</td><td rowspan="3">Majiro</td><td rowspan="3">
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Ai Suru Tsuma, Misaki no Furin Shouko<br/>
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Amber Quartz<br/>
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Arpeggio ~Kimi Iro no Melody~<br/>
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Chikan Kizoku<br/>
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@ -571,8 +572,10 @@ Soukai no Oujo-tachi<br/>
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Soukai no Valkyria <br/>
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</td></tr>
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<tr class="odd"><td>*.agf</td><td><tt>ACGF</tt></td><td>No</td></tr>
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<tr><td>*.dat</td><td><tt>DX</tt></td><td>No</td><td>Flat</td><td>
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<tr><td>*.dxa<br/>*.usi<br/>*.hud<br/>*.med<br/>*.dat</td><td><tt>DX</tt><span class="footnote">encrypted</span></td><td>No</td><td>DxLib</td><td>
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Ashita wa Kitto, Haremasu you ni<br/>
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Cross Quartz<br/>
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Hyakki Yakou<br/>
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</td></tr>
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<tr class="odd"><td>*.tcd</td><td><tt>TCD3</tt></td><td>No</td><td rowspan="2">TopCat</td><td rowspan="2">
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Atori no Sora to Shinchuu no Tsuki<br/>
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