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Split out MS-CAB ExtractFile logic

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This commit is contained in:
Matt Nadareski
2025-07-29 08:28:37 -04:00
parent 28b2eaa029
commit 6f4e7138fb
1 changed files with 36 additions and 23 deletions
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59
BinaryObjectScanner/FileType/MicrosoftCAB.cs
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@@ -197,32 +197,45 @@ namespace BinaryObjectScanner.FileType
// Loop through the files
for (int i = 0; i < files.Length; i++)
{
try
{
var compressedFile = files[i];
blockStream.Seek(compressedFile.FolderStartOffset, SeekOrigin.Begin);
byte[] fileData = blockStream.ReadBytes((int)compressedFile.FileSize);
var file = files[i];
ExtractFile(outDir, blockStream, file, includeDebug);
}
}
// Ensure directory separators are consistent
string fileName = compressedFile.Name!;
if (Path.DirectorySeparatorChar == '\\')
fileName = fileName.Replace('/', '\\');
else if (Path.DirectorySeparatorChar == '/')
fileName = fileName.Replace('\\', '/');
/// <summary>
/// Extract the contents of a single file
/// </summary>
/// <param name="outDir">Path to the output directory</param>
/// <param name="blockStream">Stream representing the uncompressed block data</param>
/// <param name="file">File information</param>
/// <param name="includeDebug">True to include debug data, false otherwise</param>
/// TODO: Remove once Serialization is updated
private static void ExtractFile(string outDir, Stream blockStream, CFFILE file, bool includeDebug)
{
try
{
blockStream.Seek(file.FolderStartOffset, SeekOrigin.Begin);
byte[] fileData = blockStream.ReadBytes((int)file.FileSize);
string tempFile = Path.Combine(outDir, fileName);
var directoryName = Path.GetDirectoryName(tempFile);
if (directoryName != null && !Directory.Exists(directoryName))
Directory.CreateDirectory(directoryName);
// Ensure directory separators are consistent
string fileName = file.Name!;
if (Path.DirectorySeparatorChar == '\\')
fileName = fileName.Replace('/', '\\');
else if (Path.DirectorySeparatorChar == '/')
fileName = fileName.Replace('\\', '/');
using var of = File.OpenWrite(tempFile);
of.Write(fileData, 0, fileData.Length);
of.Flush();
}
catch (Exception ex)
{
if (includeDebug) Console.WriteLine(ex);
}
string tempFile = Path.Combine(outDir, fileName);
var directoryName = Path.GetDirectoryName(tempFile);
if (directoryName != null && !Directory.Exists(directoryName))
Directory.CreateDirectory(directoryName);
using var of = File.OpenWrite(tempFile);
of.Write(fileData, 0, fileData.Length);
of.Flush();
}
catch (Exception ex)
{
if (includeDebug) Console.WriteLine(ex);
}
}