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(DxLib): guess key of version 6 archives.

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This commit is contained in:
morkt 2018-11-09 10:25:28 +04:00
parent ba4ec0aad4
commit aa7bfca83f
1 changed files with 43 additions and 10 deletions
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53
ArcFormats/DxLib/ArcDX.cs
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@ -2,7 +2,7 @@
//! \date Thu Oct 08 00:18:56 2015 //! \date Thu Oct 08 00:18:56 2015
//! \brief DxLib engine archives with 'DX' signature. //! \brief DxLib engine archives with 'DX' signature.
// //
// Copyright (C) 2015-2017 by morkt // Copyright (C) 2015-2018 by morkt
// //
// Permission is hereby granted, free of charge, to any person obtaining a copy // Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to // of this software and associated documentation files (the "Software"), to
@ -64,9 +64,10 @@ namespace GameRes.Formats.DxLib
public DxOpener () public DxOpener ()
{ {
Extensions = new string[] { "dxa", "hud", "usi", "med", "dat", "bin", "bcx" }; Extensions = new string[] { "dxa", "hud", "usi", "med", "dat", "bin", "bcx", "wolf" };
Signatures = new uint[] { Signatures = new uint[] {
0x19EF8ED4, 0xA9FCCEDD, 0x0AEE0FD3, 0x5523F211, 0x5524F211, 0x69FC5FE4, 0x09E19ED9, 0 0x19EF8ED4, 0xA9FCCEDD, 0x0AEE0FD3, 0x5523F211, 0x5524F211, 0x69FC5FE4, 0x09E19ED9, 0x7DCC5D83,
0
}; };
} }
@ -100,14 +101,27 @@ namespace GameRes.Formats.DxLib
return null; return null;
} }
} }
return GuessKey (file); var arc = GuessKey (file);
if (arc != null)
{
KnownKeys.Insert (0, arc.Key);
Trace.WriteLine (string.Format ("Restored key '{0}'", RestoreKey (arc.Key)), "[DXA]");
}
return arc;
} }
ArcFile GuessKey (ArcView file) DxArchive GuessKey (ArcView file)
{ {
if (file.MaxOffset > uint.MaxValue) if (file.MaxOffset > uint.MaxValue)
return null; return null;
var key = new byte[12]; var key = GuessKeyV6 (file);
if (key != null)
{
var dir = ReadIndex (file, 6, key);
if (dir != null)
return new DxArchive (file, this, dir, key, 6);
}
key = new byte[12];
for (short version = 4; version >= 1; --version) for (short version = 4; version >= 1; --version)
{ {
file.View.Read (0, key, 0, 12); file.View.Read (0, key, 0, 12);
@ -130,17 +144,36 @@ namespace GameRes.Formats.DxLib
{ {
var dir = ReadIndex (file, version, key); var dir = ReadIndex (file, version, key);
if (null != dir) if (null != dir)
{
KnownKeys.Insert (0, key);
Trace.WriteLine (string.Format ("Restored key '{0}'", RestoreKey (key)), "[DXA]");
return new DxArchive (file, this, dir, key, version); return new DxArchive (file, this, dir, key, version);
}
} }
catch { /* ignore parse errors */ } catch { /* ignore parse errors */ }
} }
return null; return null;
} }
byte[] GuessKeyV6 (ArcView file)
{
var header = file.View.ReadBytes (0, 0x30);
header[0] ^= (byte)'D';
header[1] ^= (byte)'X';
header[2] ^= 6;
uint key0 = header.ToUInt32 (0);
header[8] ^= (byte)0x30;
uint data_offset_hi = header.ToUInt32 (12) ^ key0;
if (data_offset_hi != 0)
return null;
uint key2 = header.ToUInt32 (8);
uint key1 = header.ToUInt32 (0x1C);
long index_offset = header.ToInt64 (0x10) ^ key1 ^ ((long)key2 << 32);
if (index_offset <= 0x30 || index_offset >= file.MaxOffset)
return null;
var key = new byte[12];
LittleEndian.Pack (key0, key, 0);
LittleEndian.Pack (key1, key, 4);
LittleEndian.Pack (key2, key, 8);
return key;
}
public override Stream OpenEntry (ArcFile arc, Entry entry) public override Stream OpenEntry (ArcFile arc, Entry entry)
{ {
Stream input = arc.File.CreateStream (entry.Offset, entry.Size); Stream input = arc.File.CreateStream (entry.Offset, entry.Size);