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(VffOpener): recognize archives embedded into EXE files.

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This commit is contained in:
morkt
2016-08-08 17:57:00 +04:00
parent da15b1f31f
commit 6ca6dd7e19
2 changed files with 54 additions and 11 deletions
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57
ArcFormats/LiveMaker/ArcVF.cs
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@@ -49,6 +49,7 @@ namespace GameRes.Formats.LiveMaker
public override ArcFile TryOpen (ArcView file)
{
uint base_offset = 0;
ArcView index_file = file;
ArcView extra_file = null;
try
@@ -58,24 +59,32 @@ namespace GameRes.Formats.LiveMaker
// game.001 -- [optional] extra part
// game.ext -- [optional] separate index (could be included into the main body)
if (!file.Name.EndsWith (".dat", StringComparison.InvariantCultureIgnoreCase))
return null;
uint signature = index_file.View.ReadUInt32 (0);
if (0x666676 != signature)
if (file.Name.EndsWith (".exe", StringComparison.InvariantCultureIgnoreCase)
&& (0x5A4D == (signature & 0xFFFF))) // 'MZ'
{
base_offset = SkipExeData (index_file);
signature = index_file.View.ReadUInt32 (base_offset);
}
else if (!file.Name.EndsWith (".dat", StringComparison.InvariantCultureIgnoreCase))
{
return null;
}
else if (0x666676 != signature)
{
var ext_filename = Path.ChangeExtension (file.Name, ".ext");
if (!VFS.FileExists (ext_filename))
return null;
index_file = VFS.OpenView (ext_filename);
signature = index_file.View.ReadUInt32 (0);
if (0x666676 != signature)
return null;
}
int count = index_file.View.ReadInt32 (6);
if (0x666676 != signature)
return null;
int count = index_file.View.ReadInt32 (base_offset+6);
if (!IsSaneCount (count))
return null;
var dir = ReadIndex (index_file, count);
var dir = ReadIndex (index_file, base_offset, count);
if (null == dir)
return null;
long max_offset = file.MaxOffset;
@@ -133,9 +142,9 @@ namespace GameRes.Formats.LiveMaker
return input;
}
List<Entry> ReadIndex (ArcView file, int count)
List<Entry> ReadIndex (ArcView file, uint base_offset, int count)
{
uint index_offset = 0xA;
uint index_offset = base_offset+0xA;
var name_buffer = new byte[0x100];
var rnd = new TpRandom (0x75D6EE39u);
var dir = new List<Entry> (count);
@@ -153,11 +162,11 @@ namespace GameRes.Formats.LiveMaker
dir.Add (FormatCatalog.Instance.Create<PackedEntry> (name));
}
rnd.Reset();
long offset = file.View.ReadInt64 (index_offset) ^ (int)rnd.GetRand32();
long offset = base_offset + (file.View.ReadInt64 (index_offset) ^ (int)rnd.GetRand32());
foreach (var entry in dir)
{
index_offset += 8;
long next_offset = file.View.ReadInt64 (index_offset) ^ (int)rnd.GetRand32();
long next_offset = base_offset + (file.View.ReadInt64 (index_offset) ^ (int)rnd.GetRand32());
entry.Offset = offset;
entry.Size = (uint)(next_offset - offset);
offset = next_offset;
@@ -178,6 +187,31 @@ namespace GameRes.Formats.LiveMaker
}
return Encodings.cp932.GetString (name_buf, 0, name_length);
}
uint SkipExeData (ArcView file)
{
uint offset = 0;
uint pe_offset = file.View.ReadUInt32 (0x3c);
if (pe_offset < file.MaxOffset && 0x4550 == file.View.ReadUInt32 (pe_offset)) // 'PE'
{
int opt_header = file.View.ReadUInt16 (pe_offset+0x14); // SizeOfOptionalHeader
offset = file.View.ReadUInt32 (pe_offset+0x54); // SizeOfHeaders
long section_table = pe_offset+opt_header+0x18;
int count = file.View.ReadUInt16 (pe_offset+6); // NumberOfSections
if (section_table + 0x28*count < file.MaxOffset)
{
for (int i = 0; i < count; ++i)
{
uint size = file.View.ReadUInt32 (section_table+0x10);
uint addr = file.View.ReadUInt32 (section_table+0x14);
section_table += 0x28;
if (0 != size)
offset = Math.Max (addr + size, offset);
}
}
}
return offset;
}
}
internal class TpRandom
@@ -239,6 +273,7 @@ namespace GameRes.Formats.LiveMaker
ExtraFile.Dispose();
_vff_disposed = true;
}
base.Dispose (disposing);
}
}
}