[zeromq-dev] Implementing a ZAP handler in C#

[Robert Pickering]

The next thing I tried was porting the code to the hw sample, so see if
the problem was specific to sub/pub or not. The hw sample doesn't work
either, so the problem is not specific to sub/pub as I thought:
https://gist.github.com/robertpi/224d834bc04e42f6cf23

I'll try porting the code to the libzmq directly. I also tidy up my
debug logs and publish them.

Thanks,
Robert

On Thu, Jul 23, 2015, at 09:41 PM, Arnaud Kapp wrote:
> Hello,
> 
> The authentication should happen automatically if the socket has the
> correct option configured (curve server flag, and a private key /
> public key).
> I am not aware of any limitation of the authentication / security code
> when using PUB/SUB. It should work.
> 
> I am not familiar enough with C# to know if there is something wrong
> with your code, but it looks ok.
> Are you able to get this to work using the libzmq C API?
> 
> On Thu, Jul 23, 2015 at 7:16 PM, Robert Pickering
> <robertfpickering at fastmail.com> wrote:
> > I've been continuing to look at this today. To investigate further I
> > build my own version of libzmq and added some debug code. What I think I
> > see is the handshake in zmq::stream_engine_t::in_event is successful but
> > in the sub/pub model the client sends no further data so there's nothing
> > to trigger the ZAP handler. Is there anyway to force authentication to
> > take place? Or is curve security just not an option with the sub/pub
> > model?
> >
> > Thanks,
> > Rob
> >
> > On Wed, Jul 22, 2015, at 04:54 PM, Robert Pickering wrote:
> >> I'm trying to implement a ZAP handler in C#. I've updated the patho
> >> sub/pub example to include curve cryptography and tried to add a ZAP
> >> handler in the publisher. Here's a gist of what I have so far:
> >> https://gist.github.com/robertpi/a140eaa62378c14678ad
> >>
> >> Basically in the publisher I bind a REP socket to
> >> inproc://zeromq.zap.01. I then set the ZMQ_CURVE_SERVER and
> >> ZMQ_CURVE_SECRETKEY on the publisher, while on the client I
> >> ZMQ_CURVE_SERVERKEY to be the servers public key, and set it's
> >> ZMQ_CURVE_PUBLICKEY and ZMQ_CURVE_SECRETKEY to be the clients
> >> public/secret key.
> >>
> >> Before I sent up the curve options the messages follow and the example
> >> works just fine. After I set the curve options the messages stop
> >> following. I was expecting my ZAP handling method to be called, so I
> >> could respond with with whether the client is valid or not, but it seem
> >> the ZAP handler never receives a message.
> >>
> >> I feel I'm missing some simple step to enable the ZAP handler. Do I need
> >> to send messages to inproc://zeromq.zap.01 to enable the ZAP handler? I
> >> see some examples set a verbosity option and an IP filter, are these
> >> messages that need to be sent to inproc://zeromq.zap.01? Or are they
> >> values that need to be set somewhere else?
> >>
> >> Many thanks for any help!
> >>
> >> Rob
> >>
> >> --
> >>   Robert Pickering
> >>   robertfpickering at fastmail.com
> >> _______________________________________________
> >> zeromq-dev mailing list
> >> zeromq-dev at lists.zeromq.org
> >> http://lists.zeromq.org/mailman/listinfo/zeromq-dev
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> 
> 
> 
> -- 
> Kapp Arnaud - Xaqq
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