Optionally enable TLS connection

[MAHashmi]

Adds the possibility to use a tls socket instead of net socket instance,
if a tls connection is desired.

[MAHashmi]

Reference: #40

I have tested SSL connection between client and server with this change. I can add further documentation on the usage, if this pull request gets any attention. It would be really helpful to have it merged in the main master as opposed to my fork.

[alexguan]

There are more work than just enabling TLS connections. In Zookeeper Java Client, the TLS connection always comes with the ability to add the client certs to the Auth data so the server can authenticated using mTLS.

[MAHashmi]

Thanks for the response. I am not sure I understand your point. In case mTLS is desired, the client cert and CA can be provided as an argument to tls.connect(). If rejectUnauthorized flag is enabled it would ensure mTLS. For such a case the opts for createClient would look something like this:

opts = {
    tls: {
        ca: // ca file
        key: // client key
        cert: // client cert
        rejectUnauthorized: true
    }
};

[MAHashmi]

@alexguan Any thoughts on this? I can implement any additional functionality that you think might be missing. Would love to hear your feedback.

[MAHashmi]

@alexguan ???

[sirmonin]

@alexguan any news on this?

[EddieBenji]

Hi @alexguan
Is this change planned to be merged one day?

Thank you

[nokcm]

Hi @alexguan
Can we look into merging the PR? In my use-case I neeD the mTLS conneciton