Docker SecureRandom test

00_README.md

Instructions

$ git clone https://gist.github.com/de5cea7195d757582621.git docker-java-secure_random-test
$ cd docker-java-secure_random-test
$ docker build -t local/java-secure_random-test .
$ docker run --rm -it local/java-secure_random-test

Dockerfile

FROM java:8

ENV TEST_SRC /usr/src/secure_random-test

RUN mkdir $TEST_SRC
WORKDIR $TEST_SRC

COPY SecureRandomTest.java $TEST_SRC/

RUN javac SecureRandomTest.java

CMD ["java", "-cp", ".", "SecureRandomTest"]

SecureRandomTest.java

import java.math.BigInteger;
import java.security.SecureRandom;

public class SecureRandomTest {
	public static void main(String... argz) throws Exception {
		SecureRandom rnd = SecureRandom.getInstance("SHA1PRNG");
		byte[] seed = rnd.generateSeed(1024);
		System.out.println(new BigInteger(1, seed).toString(16));
	}
}