FIPS 140-3 Certification

This image is FIPS-validated to ensure its cryptographic operations meet the Federal Information Processing Standards (FIPS) required for secure government and regulated environments. Its core cryptographic modules are validated under the NIST Cryptographic Module Validation Program (CMVP) and comply with the FIPS 140-3 standard.

To verify that the FIPS 140-3 provider is configured and active, follow the instructions in the FIPS compliance tab.

Try It Out

Check the version information for the .NET latest image:

docker run --rm reg.mini.dev/dotnet-sdk-fips dotnet --info

You should expect a response with the following structure:

.NET SDK:
 Version:           10.0.100
 Commit:            db1cdb71aa
 Workload version:  10.0.100-manifests.4eab3e0f
 MSBuild version:   18.0.2

Runtime Environment:
 OS Name:     minimos
 OS Version:  20241031
 OS Platform: Linux
 RID:         minimos.20241031-x64
 Base Path:   /usr/share/dotnet/sdk/10.0.100/

.NET workloads installed:
...

For our next test, we will use a multi-stage build using the Minimus .NET SDK and ASP.NET images to create a simple web app.

To begin, save the following two files to your project directory:

• dotnetapp.csproj is the project file for a sample .NET web application. Link to file
• Program.cs starts the web server for the sample .NET web application. Link to file

Next, in the same project directory, save the code below to a Dockerfile:

# -------- Build Stage --------
FROM reg.mini.dev/dotnet-sdk-fips:latest AS build

USER root
RUN mkdir -p /dotnetapp && chown -R 1000:1000 /dotnetapp

USER 1000
WORKDIR /dotnetapp

COPY --link --chown=1000:1000 ./dotnetapp.csproj .
COPY --link --chown=1000:1000 ./Program.cs .

RUN dotnet publish --no-self-contained -c Release -o /dotnetapp/dist

# -------- Runtime Stage --------
FROM reg.mini.dev/dotnet-aspnet-fips:latest

WORKDIR /dotnetapp

# Copy the published app from the build stage
COPY --from=build /dotnetapp/dist .

# Set the container’s entrypoint to run the web app
CMD ["dotnetapp.dll"]

Your project directory should now look like this:

project-root/
├── Dockerfile
├── dotnetapp.csproj
└── Program.cs

Note that the framework in the .csproj file should match the image version you are using. The default currently uses version 10 and framework net10.0.

Next, build and run your .NET web app. Note that the period . specifies the current directory as the build context:

docker build -t minimus-aspnet-app .
docker run minimus-aspnet-app

You should see a message such as:

info: Microsoft.Hosting.Lifetime[14]
      Now listening on: http://[::]:8080
info: Microsoft.Hosting.Lifetime[0]
      Application started. Press Ctrl+C to shut down.
info: Microsoft.Hosting.Lifetime[0]
      Hosting environment: Production
info: Microsoft.Hosting.Lifetime[0]
      Content root path: /dotnetapp

Technical Considerations

The .Net SDK FIPS image provided by Minimus is a FIPS validated, slim, security-hardened alternative to the public image from Docker Hub.

Terms & Info

This catalog is published by Minimus. All product names, logos, and marks, other than those belonging to Minimus, shown are owned by their respective rights holders and appear here only to identify the open source software each image contains. Minimus claims no ownership of those marks and implies no affiliation with, endorsement by, certification by, or sponsorship by any rights holder.

Images are provided "as-is" without warranty of any kind. "Hardened" refers to the security configuration applied at the time of build and does not constitute a guarantee of ongoing security or absence of vulnerabilities. The free tier is provided without support, SLA, or guaranteed patching timelines. Security updates may be applied to paid subscriptions before or instead of free tier images. By pulling or using any image you agree to our Terms of Use.