FileExtensionValidation 1.0.0.2
.NET Standard 2.0
This package targets .NET Standard 2.0. The package is compatible with this framework or higher.
.NET Framework 4.6.2
This package targets .NET Framework 4.6.2. The package is compatible with this framework or higher.
dotnet add package FileExtensionValidation --version 1.0.0.2
NuGet\Install-Package FileExtensionValidation -Version 1.0.0.2
This command is intended to be used within the Package Manager Console in Visual Studio, as it uses the NuGet module's version of Install-Package.
<PackageReference Include="FileExtensionValidation" Version="1.0.0.2" />
For projects that support PackageReference, copy this XML node into the project file to reference the package.
<PackageVersion Include="FileExtensionValidation" Version="1.0.0.2" />
<PackageReference Include="FileExtensionValidation" />
For projects that support Central Package Management (CPM), copy this XML node into the solution Directory.Packages.props file to version the package.
paket add FileExtensionValidation --version 1.0.0.2
The NuGet Team does not provide support for this client. Please contact its maintainers for support.
#r "nuget: FileExtensionValidation, 1.0.0.2"
#r directive can be used in F# Interactive and Polyglot Notebooks. Copy this into the interactive tool or source code of the script to reference the package.
#:package FileExtensionValidation@1.0.0.2
#:package directive can be used in C# file-based apps starting in .NET 10 preview 4. Copy this into a .cs file before any lines of code to reference the package.
#addin nuget:?package=FileExtensionValidation&version=1.0.0.2
#tool nuget:?package=FileExtensionValidation&version=1.0.0.2
The NuGet Team does not provide support for this client. Please contact its maintainers for support.
FileExtensionValidation 方案
參考自 安全框架︰輸入驗證 | 風險降低確定在接受使用者的檔案時已備妥適當的控制 區段中的程式碼，再加以調整。 主要就是讀取檔案中的 signatures(magic numbers or Magic Bytes) 來比較。
專案說明
| 專案 | 說明 | .NET版本 |
|---|---|---|
| FileExtensionValidation | fileSignature 變數記錄附檔名及檔案的 Signatures(包含Offset), IsValidFileExtension Method提供驗證檔案內容是否與附檔名相同。 | .NET Standard 2.0 |
| FileExtensionValidation.Test | FileExtensionValidation的測試程式，測試檔案會放置在Files目錄之中 | .NET 4.6.2 |
How do I install it?
FileExtensionValidation is available on NuGet, so can be installed via the Package Manager:
Install-Package FileExtensionValidation
Release Note
- 2025/07/09 修正 PNG 的檢查 v1.0.0.2
使用方式
傳入 File ByteArrays
var fileName = "1.jpg";
var filePath = Path.Combine(_folderPath, fileName);
var fileData = File.ReadAllBytes(filePath);
var isValidFileExtension = FileExtensionValidator.IsValidFileExtension(fileName, fileData, null);
//isValidFileExtension: true 表示通過，false 表示內容與附檔名不符
傳入 FileStream
var fileName = "1.jpg";
var filePath = Path.Combine(_folderPath, fileName);
var fs = File.OpenRead(filePath);
var isValidFileExtension = FileExtensionValidator.IsValidFileExtension(fileName, fs, null);
//isValidFileExtension: true 表示通過，false 表示內容與附檔名不符
註:如果不在驗證的檔案清單中，預設會回傳 False 哦!
目前 Support 的附檔名
| 附檔名 |
|---|
| .jpg |
| .odt |
| .ods |
| .xlsx |
| .xls |
| .avi |
| .mov |
| .wmv |
| .jpeg |
| .txt |
| .7z |
| .gif |
| .rm |
| .png |
| .odp |
| .wav |
| .odg |
| .3pg |
| .m4v |
| .mkv |
| .bmp |
| .mp4 |
| .mpg |
| .rar |
| .mp3 |
| .tif |
| .mpeg |
| .zip |
| .rtf |
| .ppt |
| .pptx |
| .doc |
| .docx |
參考資料
Get Feedback
License
| Product | Versions Compatible and additional computed target framework versions. |
|---|---|
| .NET | net5.0 was computed. net5.0-windows was computed. net6.0 was computed. net6.0-android was computed. net6.0-ios was computed. net6.0-maccatalyst was computed. net6.0-macos was computed. net6.0-tvos was computed. net6.0-windows was computed. net7.0 was computed. net7.0-android was computed. net7.0-ios was computed. net7.0-maccatalyst was computed. net7.0-macos was computed. net7.0-tvos was computed. net7.0-windows was computed. net8.0 was computed. net8.0-android was computed. net8.0-browser was computed. net8.0-ios was computed. net8.0-maccatalyst was computed. net8.0-macos was computed. net8.0-tvos was computed. net8.0-windows was computed. net9.0 was computed. net9.0-android was computed. net9.0-browser was computed. net9.0-ios was computed. net9.0-maccatalyst was computed. net9.0-macos was computed. net9.0-tvos was computed. net9.0-windows was computed. net10.0 was computed. net10.0-android was computed. net10.0-browser was computed. net10.0-ios was computed. net10.0-maccatalyst was computed. net10.0-macos was computed. net10.0-tvos was computed. net10.0-windows was computed. |
| .NET Core | netcoreapp2.0 was computed. netcoreapp2.1 was computed. netcoreapp2.2 was computed. netcoreapp3.0 was computed. netcoreapp3.1 was computed. |
| .NET Standard | netstandard2.0 is compatible. netstandard2.1 was computed. |
| .NET Framework | net461 was computed. net462 is compatible. net463 was computed. net47 was computed. net471 was computed. net472 was computed. net48 was computed. net481 was computed. |
| MonoAndroid | monoandroid was computed. |
| MonoMac | monomac was computed. |
| MonoTouch | monotouch was computed. |
| Tizen | tizen40 was computed. tizen60 was computed. |
| Xamarin.iOS | xamarinios was computed. |
| Xamarin.Mac | xamarinmac was computed. |
| Xamarin.TVOS | xamarintvos was computed. |
| Xamarin.WatchOS | xamarinwatchos was computed. |
Compatible target framework(s)
Included target framework(s) (in package)
Learn more about Target Frameworks and .NET Standard.
-
.NETFramework 4.6.2
- System.ValueTuple (>= 4.5.0)
-
.NETStandard 2.0
- System.ValueTuple (>= 4.5.0)
NuGet packages
This package is not used by any NuGet packages.
GitHub repositories
This package is not used by any popular GitHub repositories.