Re: Java/RPG Question

Have you got the same code working called from java?

I would suggest get that working using TLS1.2 first if you haven't already
done so.

That way at least you can validate you have everything you need for TLS 1.2
then switch it over to calling it from RPG once you have that working.

If you have done that then it's likely a classpath/authority issue I would
guess, and making sure everything you need is being picked up correctly

On Fri, 10 Sep 2021, 14:37 Blake Butterworth, <[email protected]>
wrote:

> Hello All,
>
> We have an RPG application that uses a Java class to perform HTTPS REST
> requests to an external web API. The connectivity between the systems broke
> recently (probably due to an update applied on the other side). We’ve
> determined the problem is that the process needs to establish a TLS
> 1.2-level connection since by default the Java environment appears to use
> an older, now unsupported version of TLS. We found a way to enable the Java
> code to establish a TLS 1.2 connection with the following property:
>
> -Dcom.ibm.jsse2.overrideDefaultTLS=true
>
> When we run a Java test app within QSH from the command line, it causes
> the Java code to negotiate a connection using TLS 1.2, which fixes our
> problem.
>
> Java -Dcom.ibm.jsse2.overrideDefaultTLS=true <class>
>
> When we put the property into the RPG program using the
> QIBM_RPG_JAVA_PROPERTIES environment variable, it fails. The JVM has an
> error on startup. We tried using ADDENVVAR and then the command line
> invocation without the property, which doesn’t work either. Lastly, we
> tried putting the property in a SystemDefault.properties file. It seems the
> system sees the property, but the JVM fails on startup.
>
> Has anyone else run into something like this? Is there a better/alternate
> way to configure Java to use TLS 1.2? We are currently running Java 8 on
> IBM i 7.2. Sorry, this is kind of a cross-over question. I can post it to
> the RPG side, if need be.
>
> Thanks,
> Blake Butterworth
>
> Application Development Manager
>
> Kansas Turnpike Authority
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