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(YPF): detect archives embedded into EXE files.

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This commit is contained in:
morkt 2018-02-11 10:50:09 +04:00
parent 16720db6e6
commit 43fc625d81
1 changed files with 43 additions and 18 deletions
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61
ArcFormats/YuRis/ArcYPF.cs
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@ -2,7 +2,7 @@
//! \date Mon Jul 14 14:40:06 2014
//! \brief YPF resource format implementation.
//
// Copyright (C) 2014-2015 by morkt
// Copyright (C) 2014-2018 by morkt
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to
@ -103,27 +103,42 @@ namespace GameRes.Formats.YuRis
public override bool IsHierarchic { get { return true; } }
public override bool CanWrite { get { return true; } }
static public Dictionary<string, YpfScheme> KnownSchemes = new Dictionary<string, YpfScheme>();
public YpfOpener ()
{
Signatures = new uint[] { 0x00465059, 0 };
}
static public Dictionary<string, YpfScheme> KnownSchemes { get { return DefaultScheme.KnownSchemes; } }
static YuRisScheme DefaultScheme = new YuRisScheme { KnownSchemes = new Dictionary<string, YpfScheme>() };
public override ResourceScheme Scheme
{
get { return new YuRisScheme { KnownSchemes = KnownSchemes }; }
set { KnownSchemes = ((YuRisScheme)value).KnownSchemes; }
get { return DefaultScheme; }
set { DefaultScheme = (YuRisScheme)value; }
}
public override ArcFile TryOpen (ArcView file)
{
uint version = file.View.ReadUInt32 (4);
uint count = file.View.ReadUInt32 (8);
uint dir_size = file.View.ReadUInt32 (12);
if (dir_size < count * 0x17 || count > 0xfffff)
long ypf_offset = 0;
if (file.View.AsciiEqual (0, "MZ"))
{
ypf_offset = FindYser (file);
}
if (!file.View.AsciiEqual (ypf_offset, "YPF\0"))
return null;
if (dir_size > file.View.Reserve (0x20, dir_size))
uint version = file.View.ReadUInt32 (ypf_offset+4);
int count = file.View.ReadInt32 (ypf_offset+8);
uint dir_size = file.View.ReadUInt32 (ypf_offset+12);
if (!IsSaneCount (count) || dir_size < count * 0x17)
return null;
if (dir_size > file.View.Reserve (ypf_offset+0x20, dir_size))
return null;
var parser = new Parser (file, version, count, dir_size);
var scheme = QueryEncryptionScheme (file.Name, version);
var dir = parser.ScanDir (scheme);
var dir = parser.ScanDir (scheme, ypf_offset);
if (null == dir || 0 == dir.Count)
return null;
@ -192,6 +207,16 @@ namespace GameRes.Formats.YuRis
return scheme;
}
internal long FindYser (ArcView file)
{
var exe = new ExeFile (file);
var offset = exe.FindAsciiString (exe.Overlay, "YSER", 0x10);
if (-1 == offset)
return 0;
uint header_size = file.View.ReadUInt32 (offset+4);
return offset + header_size;
}
delegate uint ChecksumFunc (byte[] data);
public override void Create (Stream output, IEnumerable<Entry> list, ResourceOptions options,
@ -358,7 +383,7 @@ namespace GameRes.Formats.YuRis
uint* header = (uint*)raw;
uint version = header[1];
int first_item, last_item;
if (version >= 0x1CE || 0x12C == version || 0x19A == version)
if (version >= 0x1CE || 0x12C == version || 0x19A == version || 0x1C3 == version)
{
first_item = 3;
last_item = 7;
@ -404,10 +429,10 @@ namespace GameRes.Formats.YuRis
{
ArcView m_file;
uint m_version;
uint m_count;
int m_count;
uint m_dir_size;
public Parser (ArcView file, uint version, uint count, uint dir_size)
public Parser (ArcView file, uint version, int count, uint dir_size)
{
m_file = file;
m_count = count;
@ -417,15 +442,15 @@ namespace GameRes.Formats.YuRis
// int32-name_checksum, byte-name_count, *-name, byte-file_type
// byte-pack_flag, int32-size, int32-packed_size, int32-offset, int32-file_checksum
public List<Entry> ScanDir (YpfScheme scheme)
public List<Entry> ScanDir (YpfScheme scheme, long base_offset = 0)
{
uint dir_offset = 0x20;
long dir_offset = base_offset + 0x20;
uint dir_remaining = m_dir_size;
var dir = new List<Entry> ((int)m_count);
var dir = new List<Entry> (m_count);
byte key = scheme.Key;
bool guess_key = scheme.GuessKey;
uint extra_size = 0x12 + scheme.ExtraHeaderSize;
for (uint num = 0; num < m_count; ++num)
for (int num = 0; num < m_count; ++num)
{
if (dir_remaining < 5+extra_size)
return null;
@ -482,7 +507,7 @@ namespace GameRes.Formats.YuRis
entry.IsPacked = 0 != m_file.View.ReadByte (dir_offset+1);
entry.UnpackedSize = m_file.View.ReadUInt32 (dir_offset+2);
entry.Size = m_file.View.ReadUInt32 (dir_offset+6);
entry.Offset = m_file.View.ReadUInt32 (dir_offset+10);
entry.Offset = m_file.View.ReadUInt32 (dir_offset+10) + base_offset;
if (entry.CheckPlacement (m_file.MaxOffset))
dir.Add (entry);
dir_offset += extra_size;