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

To take the Minimus OpenJDK image for a test run, we will require both OpenJDK and OpenJRE in our Dockerfile to keep the build and runtime environments separate and include only the compiled .class in the final image. Our test will also involve a Java project with a simple program that prints a welcome message.

First, create 2 files in your directory:

• Dockerfile
• MyMinimus.java

Save the following code to your Dockerfile:

# === Build Stage ===

FROM reg.mini.dev/openjdk-fips AS builder

COPY MyMinimus.java /home/build/

WORKDIR /home/build/

RUN javac -d /home/build MyMinimus.java
       
# === Runtime Stage ===

FROM reg.mini.dev/openjre-fips

COPY --from=0 /home/build/MyMinimus.class /app/

WORKDIR /app/

CMD ["java", "MyMinimus"]

Save the following Java script to the file MyMinimus.java. Note that for Java to compile properly, the filename must match the public class name, so be sure to save the file as MyMinimus.java.

 class MyMinimus
 {
     public static void main(String args[])
     {
         System.out.println("Welcome to MyMinimus!");
     }
 }   

Next, build the custom image and run it. Note that the period . specifies the current directory as the build context:

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

You should see the greeting Welcome to MyMinimus! in your terminal.

Technical Considerations

The OpenJDK-FIPS image provided by Minimus is a slim, security-hardened alternative to the public image from eclipse-temurin (since the Docker official image is deprecated). The images are largely interchangeable, with a few differences as noted below.