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Identify and use .rsrc item for NSIS

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This commit is contained in:
Matt Nadareski
2021-09-10 21:45:14 -07:00
parent 2a6a2930c1
commit bf385f0bbf
2 changed files with 6 additions and 44 deletions
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48
BurnOutSharp/PackerType/NSIS.cs
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@@ -4,6 +4,7 @@ using System.Linq;
using System.Text;
using BurnOutSharp.ExecutableType.Microsoft;
using BurnOutSharp.Matching;
using BurnOutSharp.Tools;
namespace BurnOutSharp.PackerType
{
@@ -17,30 +18,10 @@ namespace BurnOutSharp.PackerType
if (sections == null)
return null;
// TODO: Find this inside of the .rsrc section using the executable header
// Get the .rsrc section, if it exists
var rsrcSection = sections.FirstOrDefault(s => Encoding.ASCII.GetString(s.Name).StartsWith(".rsrc"));
if (rsrcSection != null)
{
int sectionAddr = (int)rsrcSection.PointerToRawData;
int sectionEnd = sectionAddr + (int)rsrcSection.VirtualSize;
var matchers = new List<ContentMatchSet>
{
// Nullsoft Install System
new ContentMatchSet(
new ContentMatch(new byte?[]
{
0x4e, 0x75, 0x6c, 0x6c, 0x73, 0x6f, 0x66, 0x74,
0x20, 0x49, 0x6e, 0x73, 0x74, 0x61, 0x6c, 0x6c,
0x20, 0x53, 0x79, 0x73, 0x74, 0x65, 0x6d
}, start: sectionAddr, end: sectionEnd),
GetVersion, "NSIS"),
};
string match = MatchUtil.GetFirstMatch(file, fileContent, matchers, includeDebug);
if (!string.IsNullOrWhiteSpace(match))
return match;
}
string description = Utilities.GetManifestDescription(pex);
Console.WriteLine(description);
if (!string.IsNullOrWhiteSpace(description) && description.StartsWith("Nullsoft Install System"))
return $"NSIS {description.Substring("Nullsoft Install System".Length).Trim()}";
// Get the .data section, if it exists
var dataSection = sections.FirstOrDefault(s => Encoding.ASCII.GetString(s.Name).StartsWith(".data"));
@@ -67,24 +48,5 @@ namespace BurnOutSharp.PackerType
return null;
}
public static string GetVersion(string file, byte[] fileContent, List<int> positions)
{
try
{
int index = positions[0];
index += 24;
if (fileContent[index] != 'v')
return "(Unknown Version)";
var versionBytes = new ReadOnlySpan<byte>(fileContent, index, 16).ToArray();
var onlyVersion = versionBytes.TakeWhile(b => b != '<').ToArray();
return Encoding.ASCII.GetString(onlyVersion);
}
catch
{
return "(Unknown Version)";
}
}
}
}

2
BurnOutSharp/Tools/Utilities.cs
View File

@@ -435,7 +435,7 @@ namespace BurnOutSharp.Tools
/// </summary>
/// <param name="rs">ResourceSection from the executable</param>
/// <returns>Full assembly manifest, null on error</returns>
private static string FindAssemblyManifest(ResourceSection rs) => FindResourceInSection(rs, dataStart: "<assembly")?.DataAsUTF8String;
private static string FindAssemblyManifest(ResourceSection rs) => FindResourceInSection(rs, dataContains: "<assembly")?.DataAsUTF8String;
/// <summary>
/// Get the assembly identity node from an embedded manifest