Testcontainers is including shaded classes of Bouncycastle

[d53dave]

Hi,

I've read that with version 1.11 (#1307) the shaded dependencies were removed. I'm using v 1.15.3 now and I still see shaded classes in org.testcontainers.shaded.org.bouncycastle. While this hasn't caused direct issues for me (yet), autocomplete still suggests those classes before the ones that I directly include as dependencies in my project.

I know this is a debatable subject, but if the initial reason for shading (netty) went away in May 2019, then these classes really should not be in here anymore.

[lukaseder]

I came across this because I've found at least 3 shaded instances of a Base64 encoding/decoding algorithm on the classpath when testcontainers is present:

Since JDK 8, there is now java.util.Base64, so I was going to suggest replacing the others. But I can't even find any reference to org.bouncycastle. Is this dependency still needed, even?

[vlsi]

For reference, bouncycastle comes as a transitive dependency of com.github.docker-java:docker-java-core:

% ./gradlew :testcontainers:dependencies --configuration shaded

shaded
+--- org.awaitility:awaitility:4.2.0
|    \--- org.hamcrest:hamcrest:2.1
+--- com.github.docker-java:docker-java-bom:3.4.2
|    +--- com.github.docker-java:docker-java-core:3.4.2 (c)
|    +--- com.github.docker-java:docker-java-api:3.4.2 (c)
|    \--- com.github.docker-java:docker-java-transport:3.4.2 (c)
+--- com.github.docker-java:docker-java-core -> 3.4.2
|    +--- com.github.docker-java:docker-java-api:3.4.2
|    |    +--- com.fasterxml.jackson.core:jackson-annotations:2.10.3
|    |    \--- org.slf4j:slf4j-api:1.7.30
|    +--- com.github.docker-java:docker-java-transport:3.4.2
|    +--- org.slf4j:slf4j-api:1.7.30
|    +--- commons-io:commons-io:2.13.0
|    +--- org.apache.commons:commons-compress:1.21
|    +--- org.apache.commons:commons-lang3:3.12.0
|    +--- com.fasterxml.jackson.core:jackson-databind:2.10.3 -> 2.8.8
|    |    +--- com.fasterxml.jackson.core:jackson-annotations:2.8.0 -> 2.10.3
|    |    \--- com.fasterxml.jackson.core:jackson-core:2.8.8
|    \--- org.bouncycastle:bcpkix-jdk18on:1.76
|         +--- org.bouncycastle:bcprov-jdk18on:1.76
|         \--- org.bouncycastle:bcutil-jdk18on:1.76
|              \--- org.bouncycastle:bcprov-jdk18on:1.76
+--- com.google.guava:guava:33.3.1-jre
|    +--- com.google.guava:failureaccess:1.0.2
|    +--- com.google.guava:listenablefuture:9999.0-empty-to-avoid-conflict-with-guava
|    +--- com.google.code.findbugs:jsr305:3.0.2
|    +--- org.checkerframework:checker-qual:3.43.0
|    +--- com.google.errorprone:error_prone_annotations:2.28.0
|    \--- com.google.j2objc:j2objc-annotations:3.0.0
+--- org.yaml:snakeyaml:1.33
+--- org.glassfish.main.external:trilead-ssh2-repackaged:4.1.2
\--- org.zeroturnaround:zt-exec:1.12
     \--- org.slf4j:slf4j-api:1.7.2 -> 1.7.30