Pass proxy certificates to TLS query

[ArturAralin]

Reason: some services uses self-signed certificates for communication (or authorization), but currently certs passed only to proxy server not to target service.

Solution: pass certificates to tls query to target service

[LuizFelipeNeves]

Please merge!

[cupofjoakim]

@TooTallNate Mind giving this a look? Would help a lot!

[pauldraper]

This would have saved me hours.

[FrankEssenberger]

I also had the problem that client certificate auth did not work via the proxy agent. I added the proposed manually to our node_modules and it did the trick that the certificate are also forwarded to the target system. Would be nice to get this in the main code line.

[barroudjo]

Yep I agree this would be a great addition. We actually need this in our team !

[dscalzi]

workaround while this is being ignored: #89

[dscalzi]

@TooTallNate bump? Libraries like https://github.com/delvedor/hpagent support this out of the box.

[TooTallNate]

You should be passing in options meant for the destination endpoint directly to https.get(). The options passed in the Agent constructor are meant for the connection to the proxy server.

[pmuellr]

For folks following the various TLS threads here ...

I'm in a sticky wicket here ... I'm using axios, but it doesn't seem to have a way to send https config along with a request. The way I've seen it done there is by using a customized http agent. And we're using the https-proxy-agent as our agent, which doesn't seem to support setting https options for the target, just the proxy.

Torn between using hpagent, the subclass trick with callback, or see if I can chain multiple agents - I guess I want an ordinary https agent, which then chains to the proxy agent, but no idea if this is supported, or will cause other issues ...