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[WIP] Add 7-Zip SFX extraction (#321)

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* Add 7-Zip SFX extraction

Newest SharpCompress added support for extracting 7-Zip SFX files, so we can add support for them here too.

* Clean up 7z SFX extraction method

* Remove unneeded import

* Use file instead of stream for 7z SFX

* Update 7z SFX to be more consistent with other packers
This commit is contained in:
TheRogueArchivist
2024-09-25 22:30:25 -06:00
committed by GitHub
parent 8df58fa4d4
commit 54cb996fce
1 changed files with 57 additions and 1 deletions
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58
BinaryObjectScanner/Packer/SevenZipSFX.cs
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@@ -1,10 +1,16 @@
using System;
using System.IO;
using System.Linq;
using BinaryObjectScanner.Interfaces;
using SabreTools.Serialization.Wrappers;
#if NET462_OR_GREATER || NETCOREAPP
using SharpCompress.Archives;
using SharpCompress.Archives.SevenZip;
using SharpCompress.Readers;
#endif
namespace BinaryObjectScanner.Packer
{
// TODO: Add extraction
public class SevenZipSFX : IExtractablePortableExecutable, IPortableExecutableCheck
{
/// <inheritdoc/>
@@ -47,7 +53,57 @@ namespace BinaryObjectScanner.Packer
/// <inheritdoc/>
public string? Extract(string file, PortableExecutable pex, bool includeDebug)
{
if (!File.Exists(file))
return null;
#if NET462_OR_GREATER || NETCOREAPP
try
{
// Create a temp output directory
string tempPath = Path.Combine(Path.GetTempPath(), Guid.NewGuid().ToString());
Directory.CreateDirectory(tempPath);
using (SevenZipArchive sevenZipFile = SevenZipArchive.Open(file, new ReaderOptions() { LookForHeader = true }))
{
foreach (var entry in sevenZipFile.Entries)
{
try
{
// If the entry is a directory
if (entry.IsDirectory)
continue;
// If the entry has an invalid key
if (entry.Key == null)
continue;
// If we have a partial entry due to an incomplete multi-part archive, skip it
if (!entry.IsComplete)
continue;
string tempFile = Path.Combine(tempPath, entry.Key);
var directoryName = Path.GetDirectoryName(tempFile);
if (directoryName != null && !Directory.Exists(directoryName))
Directory.CreateDirectory(directoryName);
entry.WriteToFile(tempFile);
}
catch (Exception ex)
{
if (includeDebug) Console.WriteLine(ex);
}
}
}
return tempPath;
}
catch (Exception ex)
{
if (includeDebug) Console.WriteLine(ex);
return null;
}
#else
return null;
#endif
}
}
}